RepoMirrors/crash
1
0
Fork 0
mirror of https://github.com/crash-utility/crash synced 2025-02-01 22:02:36 +00:00
Code Issues Packages Projects Releases Wiki Activity
618066f433
crash/memory.c
Dave Anderson 6871d539a8 Implemented a new "kmem -h" option that displays the address of 
each hugepage hstate array entry, its hugepage size, its free and
total counts, and name string.
(anderson@redhat.com)
2014-05-16 17:19:23 -04:00

18028 lines
489 KiB
C
Raw Blame History

/* memory.c - core analysis suite
*
* Copyright (C) 1999, 2000, 2001, 2002 Mission Critical Linux, Inc.
* Copyright (C) 2002-2014 David Anderson
* Copyright (C) 2002-2014 Red Hat, Inc. All rights reserved.
* Copyright (C) 2002 Silicon Graphics, Inc.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*/
#include "defs.h"
#include <sys/mman.h>
#include <ctype.h>
#include <netinet/in.h>
struct meminfo { /* general purpose memory information structure */
ulong cache; /* used by the various memory searching/dumping */
ulong slab; /* routines. Only one of these is used per cmd */
ulong c_flags; /* so stuff whatever's helpful in here... */
ulong c_offset;
ulong c_num;
ulong s_mem;
void *s_freep;
ulong *s_index;
ulong s_inuse;
ulong cpucached_cache;
ulong cpucached_slab;
ulong inuse;
ulong order;
ulong slabsize;
ulong num_slabs;
ulong objects;
ulonglong spec_addr;
ulong flags;
ulong size;
ulong objsize;
int memtype;
int free;
int slab_offset;
char *reqname;
char *curname;
ulong *addrlist;
int *kmem_bufctl;
ulong *cpudata[NR_CPUS];
ulong *shared_array_cache;
int current_cache_index;
ulong found;
ulong retval;
char *ignore;
int errors;
int calls;
int cpu;
int cache_count;
ulong get_shared;
ulong get_totalram;
ulong get_buffers;
ulong get_slabs;
char *slab_buf;
char *cache_buf;
ulong *cache_list;
struct vmlist {
ulong addr;
ulong size;
} *vmlist;
ulong container;
int *freelist;
int freelist_index_size;
};
/*
* Search modes
*/
#define SEARCH_ULONG (0)
#define SEARCH_UINT (1)
#define SEARCH_USHORT (2)
#define SEARCH_CHARS (3)
#define SEARCH_DEFAULT (SEARCH_ULONG)
/* search mode information */
struct searchinfo {
int mode;
int vcnt;
int val;
int context;
int memtype;
int do_task_header;
int tasks_found;
struct task_context *task_context;
ulong vaddr_start;
ulong vaddr_end;
ulonglong paddr_start;
ulonglong paddr_end;
union {
/* default ulong search */
struct {
ulong value[MAXARGS];
char *opt_string[MAXARGS];
ulong mask;
} s_ulong;
/* uint search */
struct {
uint value[MAXARGS];
char *opt_string[MAXARGS];
uint mask;
} s_uint;
/* ushort search */
struct {
ushort value[MAXARGS];
char *opt_string[MAXARGS];
ushort mask;
} s_ushort;
/* string (chars) search */
struct {
char *value[MAXARGS];
int len[MAXARGS];
int started_flag; /* string search needs history */
} s_chars;
} s_parms;
char buf[BUFSIZE];
};
static char *memtype_string(int, int);
static char *error_handle_string(ulong);
static void dump_mem_map(struct meminfo *);
static void dump_mem_map_SPARSEMEM(struct meminfo *);
static void fill_mem_map_cache(ulong, ulong, char *);
static void page_flags_init(void);
static int page_flags_init_from_pageflag_names(void);
static int page_flags_init_from_pageflags_enum(void);
static int translate_page_flags(char *, ulong);
static void dump_free_pages(struct meminfo *);
static int dump_zone_page_usage(void);
static void dump_multidimensional_free_pages(struct meminfo *);
static void dump_free_pages_zones_v1(struct meminfo *);
static void dump_free_pages_zones_v2(struct meminfo *);
struct free_page_callback_data;
static int dump_zone_free_area(ulong, int, ulong, struct free_page_callback_data *);
static void dump_page_hash_table(struct meminfo *);
static void kmem_search(struct meminfo *);
static void kmem_cache_init(void);
static void kmem_cache_init_slub(void);
static ulong max_cpudata_limit(ulong, ulong *);
static void kmem_cache_downsize(void);
static int ignore_cache(struct meminfo *, char *);
static char *is_kmem_cache_addr(ulong, char *);
static char *is_kmem_cache_addr_common(ulong, char *);
static void kmem_cache_list(void);
static void dump_kmem_cache(struct meminfo *);
static void dump_kmem_cache_percpu_v1(struct meminfo *);
static void dump_kmem_cache_percpu_v2(struct meminfo *);
static void dump_kmem_cache_slub(struct meminfo *);
static void dump_kmem_cache_info_v2(struct meminfo *);
static void kmem_cache_list_common(void);
static ulong get_cpu_slab_ptr(struct meminfo *, int, ulong *);
static unsigned int oo_order(ulong);
static unsigned int oo_objects(ulong);
static char *vaddr_to_kmem_cache(ulong, char *, int);
static char *is_slab_overload_page(ulong, ulong *, char *);
static ulong vaddr_to_slab(ulong);
static void do_slab_chain(int, struct meminfo *);
static void do_slab_chain_percpu_v1(long, struct meminfo *);
static void do_slab_chain_percpu_v2(long, struct meminfo *);
static void do_slab_chain_percpu_v2_nodes(long, struct meminfo *);
static void do_slab_chain_slab_overload_page(long, struct meminfo *);
static int slab_freelist_index_size(void);
static void do_slab_slub(struct meminfo *, int);
static void do_kmem_cache_slub(struct meminfo *);
static void save_slab_data(struct meminfo *);
static int slab_data_saved(struct meminfo *);
static void dump_saved_slab_data(void);
static void dump_slab(struct meminfo *);
static void dump_slab_percpu_v1(struct meminfo *);
static void dump_slab_percpu_v2(struct meminfo *);
static void dump_slab_overload_page(struct meminfo *);
static int verify_slab_v1(struct meminfo *, ulong, int);
static int verify_slab_v2(struct meminfo *, ulong, int);
static int verify_slab_overload_page(struct meminfo *, ulong, int);
static void gather_slab_free_list(struct meminfo *);
static void gather_slab_free_list_percpu(struct meminfo *);
static void gather_slab_free_list_slab_overload_page(struct meminfo *);
static void gather_cpudata_list_v1(struct meminfo *);
static void gather_cpudata_list_v2(struct meminfo *);
static void gather_cpudata_list_v2_nodes(struct meminfo *, int);
static int check_cpudata_list(struct meminfo *, ulong);
static int check_shared_list(struct meminfo *, ulong);
static void gather_slab_cached_count(struct meminfo *);
static void dump_slab_objects(struct meminfo *);
static void dump_slab_objects_percpu(struct meminfo *);
static void dump_vmlist(struct meminfo *);
static void dump_vmap_area(struct meminfo *);
static int dump_page_lists(struct meminfo *);
static void dump_kmeminfo(void);
static int page_to_phys(ulong, physaddr_t *);
static void display_memory(ulonglong, long, ulong, int, void *);
static char *show_opt_string(struct searchinfo *);
static void display_with_pre_and_post(void *, ulonglong, struct searchinfo *);
static ulong search_ulong(ulong *, ulong, int, struct searchinfo *);
static ulong search_uint(ulong *, ulong, int, struct searchinfo *);
static ulong search_ushort(ulong *, ulong, int, struct searchinfo *);
static ulong search_chars(ulong *, ulong, int, struct searchinfo *);
static ulonglong search_ulong_p(ulong *, ulonglong, int, struct searchinfo *);
static ulonglong search_uint_p(ulong *, ulonglong, int, struct searchinfo *);
static ulonglong search_ushort_p(ulong *, ulonglong, int, struct searchinfo *);
static ulonglong search_chars_p(ulong *, ulonglong, int, struct searchinfo *);
static void search_virtual(struct searchinfo *);
static void search_physical(struct searchinfo *);
static int next_upage(struct task_context *, ulong, ulong *);
static int next_kpage(ulong, ulong *);
static int next_physpage(ulonglong, ulonglong *);
static int next_vmlist_vaddr(ulong, ulong *);
static int next_module_vaddr(ulong, ulong *);
static int next_identity_mapping(ulong, ulong *);
static int vm_area_page_dump(ulong, ulong, ulong, ulong, ulong,
struct reference *);
static int dump_swap_info(ulong, ulong *, ulong *);
static void swap_info_init(void);
static char *get_swapdev(ulong, char *);
static void fill_swap_info(ulong);
static char *vma_file_offset(ulong, ulong, char *);
static ssize_t read_dev_kmem(ulong, char *, long);
static void dump_memory_nodes(int);
static void dump_zone_stats(void);
#define MEMORY_NODES_DUMP (0)
#define MEMORY_NODES_INITIALIZE (1)
static void node_table_init(void);
static int compare_node_data(const void *, const void *);
static void do_vm_flags(ulonglong);
static ulonglong get_vm_flags(char *);
static void PG_reserved_flag_init(void);
static void PG_slab_flag_init(void);
static ulong nr_blockdev_pages(void);
void sparse_mem_init(void);
void dump_mem_sections(void);
void list_mem_sections(void);
ulong sparse_decode_mem_map(ulong, ulong);
char *read_mem_section(ulong);
ulong nr_to_section(ulong);
int valid_section(ulong);
int section_has_mem_map(ulong);
ulong section_mem_map_addr(ulong);
ulong valid_section_nr(ulong);
ulong pfn_to_map(ulong);
static int get_nodes_online(void);
static int next_online_node(int);
static ulong next_online_pgdat(int);
static int vm_stat_init(void);
static int vm_event_state_init(void);
static int dump_vm_stat(char *, long *, ulong);
static int dump_vm_event_state(void);
static int dump_page_states(void);
static int generic_read_dumpfile(ulonglong, void *, long, char *, ulong);
static int generic_write_dumpfile(ulonglong, void *, long, char *, ulong);
static int page_to_nid(ulong);
static int get_kmem_cache_list(ulong **);
static int get_kmem_cache_slub_data(long, struct meminfo *);
static ulong compound_head(ulong);
static long count_partial(ulong, struct meminfo *);
static ulong get_freepointer(struct meminfo *, void *);
static int count_free_objects(struct meminfo *, ulong);
char *is_slab_page(struct meminfo *, char *);
static void do_node_lists_slub(struct meminfo *, ulong, int);
static int devmem_is_restricted(void);
static int switch_to_proc_kcore(void);
static int verify_pfn(ulong);
static void dump_per_cpu_offsets(void);
static void dump_page_flags(ulonglong);
static ulong kmem_cache_nodelists(ulong);
static void dump_hstates(void);
/*
* Memory display modes specific to this file.
*/
#define DISPLAY_8 (0x2)
#define DISPLAY_16 (0x4)
#define DISPLAY_32 (0x8)
#define DISPLAY_64 (0x10)
#define SHOW_OFFSET (0x20)
#define SYMBOLIC (0x40)
#define HEXADECIMAL (0x80)
#define DECIMAL (0x100)
#define UDECIMAL (0x200)
#define ASCII_ENDLINE (0x400)
#define NO_ASCII (0x800)
#define SLAB_CACHE (0x1000)
#define DISPLAY_ASCII (0x2000)
#define NET_ENDIAN (0x4000)
#define DISPLAY_RAW (0x8000)
#define NO_ERROR (0x10000)
#define SLAB_CACHE2 (0x20000)
#define DISPLAY_TYPES (DISPLAY_RAW|DISPLAY_ASCII|DISPLAY_8|\
DISPLAY_16|DISPLAY_32|DISPLAY_64)
#define ASCII_UNLIMITED ((ulong)(-1) >> 1)
static ulong DISPLAY_DEFAULT;
/*
* Verify that the sizeof the primitive types are reasonable.
*/
void
mem_init(void)
{
if (sizeof(char) != SIZEOF_8BIT)
error(FATAL, "unsupported sizeof(char): %d\n", sizeof(char));
if (sizeof(short) != SIZEOF_16BIT)
error(FATAL, "unsupported sizeof(short): %d\n", sizeof(short));
if ((sizeof(int) != SIZEOF_32BIT) && (sizeof(int) != SIZEOF_64BIT))
error(FATAL, "unsupported sizeof(int): %d\n", sizeof(int));
if ((sizeof(long) != SIZEOF_32BIT) && (sizeof(long) != SIZEOF_64BIT))
error(FATAL, "unsupported sizeof(long): %d\n", sizeof(long));
if (sizeof(void *) != sizeof(long))
error(FATAL, "pointer size: %d is not sizeof(long): %d\n", sizeof(void *), sizeof(long));
DISPLAY_DEFAULT = (sizeof(long) == 8) ? DISPLAY_64 : DISPLAY_32;
}
/*
* Stash a few popular offsets and some basic kernel virtual memory
* items used by routines in this file.
*/
void
vm_init(void)
{
char buf[BUFSIZE];
int i, len, dimension;
struct syment *sp_array[2];
ulong value1, value2;
char *kmem_cache_node_struct, *nodelists_field;
MEMBER_OFFSET_INIT(task_struct_mm, "task_struct", "mm");
MEMBER_OFFSET_INIT(mm_struct_mmap, "mm_struct", "mmap");
MEMBER_OFFSET_INIT(mm_struct_pgd, "mm_struct", "pgd");
MEMBER_OFFSET_INIT(mm_struct_rss, "mm_struct", "rss");
if (!VALID_MEMBER(mm_struct_rss))
MEMBER_OFFSET_INIT(mm_struct_rss, "mm_struct", "_rss");
MEMBER_OFFSET_INIT(mm_struct_anon_rss, "mm_struct", "_anon_rss");
MEMBER_OFFSET_INIT(mm_struct_file_rss, "mm_struct", "_file_rss");
if (!VALID_MEMBER(mm_struct_anon_rss)) {
MEMBER_OFFSET_INIT(mm_struct_rss_stat, "mm_struct", "rss_stat");
MEMBER_OFFSET_INIT(mm_rss_stat_count, "mm_rss_stat", "count");
}
MEMBER_OFFSET_INIT(mm_struct_total_vm, "mm_struct", "total_vm");
MEMBER_OFFSET_INIT(mm_struct_start_code, "mm_struct", "start_code");
MEMBER_OFFSET_INIT(vm_area_struct_vm_mm, "vm_area_struct", "vm_mm");
MEMBER_OFFSET_INIT(vm_area_struct_vm_next, "vm_area_struct", "vm_next");
MEMBER_OFFSET_INIT(vm_area_struct_vm_end, "vm_area_struct", "vm_end");
MEMBER_OFFSET_INIT(vm_area_struct_vm_start,
"vm_area_struct", "vm_start");
MEMBER_OFFSET_INIT(vm_area_struct_vm_flags,
"vm_area_struct", "vm_flags");
MEMBER_OFFSET_INIT(vm_area_struct_vm_file, "vm_area_struct", "vm_file");
MEMBER_OFFSET_INIT(vm_area_struct_vm_offset,
"vm_area_struct", "vm_offset");
MEMBER_OFFSET_INIT(vm_area_struct_vm_pgoff,
"vm_area_struct", "vm_pgoff");
MEMBER_SIZE_INIT(vm_area_struct_vm_flags, "vm_area_struct", "vm_flags");
MEMBER_OFFSET_INIT(vm_struct_addr, "vm_struct", "addr");
MEMBER_OFFSET_INIT(vm_struct_size, "vm_struct", "size");
MEMBER_OFFSET_INIT(vm_struct_next, "vm_struct", "next");
MEMBER_OFFSET_INIT(vmap_area_va_start, "vmap_area", "va_start");
MEMBER_OFFSET_INIT(vmap_area_va_end, "vmap_area", "va_end");
MEMBER_OFFSET_INIT(vmap_area_list, "vmap_area", "list");
MEMBER_OFFSET_INIT(vmap_area_flags, "vmap_area", "flags");
MEMBER_OFFSET_INIT(vmap_area_vm, "vmap_area", "vm");
if (INVALID_MEMBER(vmap_area_vm))
MEMBER_OFFSET_INIT(vmap_area_vm, "vmap_area", "private");
STRUCT_SIZE_INIT(vmap_area, "vmap_area");
if (VALID_MEMBER(vmap_area_va_start) &&
VALID_MEMBER(vmap_area_va_end) &&
VALID_MEMBER(vmap_area_flags) &&
VALID_MEMBER(vmap_area_list) &&
VALID_MEMBER(vmap_area_vm) &&
kernel_symbol_exists("vmap_area_list"))
vt->flags |= USE_VMAP_AREA;
MEMBER_OFFSET_INIT(page_next, "page", "next");
if (VALID_MEMBER(page_next))
MEMBER_OFFSET_INIT(page_prev, "page", "prev");
MEMBER_OFFSET_INIT(page_list, "page", "list");
if (VALID_MEMBER(page_list)) {
ASSIGN_OFFSET(page_list_next) = OFFSET(page_list) +
OFFSET(list_head_next);
ASSIGN_OFFSET(page_list_prev) = OFFSET(page_list) +
OFFSET(list_head_prev);
}
MEMBER_OFFSET_INIT(page_next_hash, "page", "next_hash");
MEMBER_OFFSET_INIT(page_inode, "page", "inode");
MEMBER_OFFSET_INIT(page_offset, "page", "offset");
MEMBER_OFFSET_INIT(page_count, "page", "count");
if (INVALID_MEMBER(page_count)) {
MEMBER_OFFSET_INIT(page_count, "page", "_count");
if (INVALID_MEMBER(page_count))
ANON_MEMBER_OFFSET_INIT(page_count, "page", "_count");
}
MEMBER_OFFSET_INIT(page_flags, "page", "flags");
MEMBER_SIZE_INIT(page_flags, "page", "flags");
MEMBER_OFFSET_INIT(page_mapping, "page", "mapping");
if (INVALID_MEMBER(page_mapping))
ANON_MEMBER_OFFSET_INIT(page_mapping, "page", "mapping");
if (INVALID_MEMBER(page_mapping) &&
(THIS_KERNEL_VERSION < LINUX(2,6,17)) &&
MEMBER_EXISTS("page", "_mapcount"))
ASSIGN_OFFSET(page_mapping) = MEMBER_OFFSET("page", "_mapcount") +
STRUCT_SIZE("atomic_t") + sizeof(ulong);
MEMBER_OFFSET_INIT(page_index, "page", "index");
if (INVALID_MEMBER(page_index))
ANON_MEMBER_OFFSET_INIT(page_index, "page", "index");
MEMBER_OFFSET_INIT(page_buffers, "page", "buffers");
MEMBER_OFFSET_INIT(page_lru, "page", "lru");
if (INVALID_MEMBER(page_lru))
ANON_MEMBER_OFFSET_INIT(page_lru, "page", "lru");
MEMBER_OFFSET_INIT(page_pte, "page", "pte");
MEMBER_OFFSET_INIT(mm_struct_pgd, "mm_struct", "pgd");
MEMBER_OFFSET_INIT(swap_info_struct_swap_file,
"swap_info_struct", "swap_file");
MEMBER_OFFSET_INIT(swap_info_struct_swap_vfsmnt,
"swap_info_struct", "swap_vfsmnt");
MEMBER_OFFSET_INIT(swap_info_struct_flags,
"swap_info_struct", "flags");
MEMBER_OFFSET_INIT(swap_info_struct_swap_map,
"swap_info_struct", "swap_map");
MEMBER_OFFSET_INIT(swap_info_struct_swap_device,
"swap_info_struct", "swap_device");
MEMBER_OFFSET_INIT(swap_info_struct_prio, "swap_info_struct", "prio");
MEMBER_OFFSET_INIT(swap_info_struct_max, "swap_info_struct", "max");
MEMBER_OFFSET_INIT(swap_info_struct_pages, "swap_info_struct", "pages");
MEMBER_OFFSET_INIT(swap_info_struct_inuse_pages, "swap_info_struct",
"inuse_pages");
MEMBER_OFFSET_INIT(swap_info_struct_old_block_size,
"swap_info_struct", "old_block_size");
MEMBER_OFFSET_INIT(block_device_bd_inode, "block_device", "bd_inode");
MEMBER_OFFSET_INIT(block_device_bd_list, "block_device", "bd_list");
MEMBER_OFFSET_INIT(block_device_bd_disk, "block_device", "bd_disk");
MEMBER_OFFSET_INIT(inode_i_mapping, "inode", "i_mapping");
MEMBER_OFFSET_INIT(address_space_nrpages, "address_space", "nrpages");
if (INVALID_MEMBER(address_space_nrpages))
MEMBER_OFFSET_INIT(address_space_nrpages, "address_space", "__nrpages");
MEMBER_OFFSET_INIT(gendisk_major, "gendisk", "major");
MEMBER_OFFSET_INIT(gendisk_fops, "gendisk", "fops");
MEMBER_OFFSET_INIT(gendisk_disk_name, "gendisk", "disk_name");
STRUCT_SIZE_INIT(block_device, "block_device");
STRUCT_SIZE_INIT(address_space, "address_space");
STRUCT_SIZE_INIT(gendisk, "gendisk");
STRUCT_SIZE_INIT(blk_major_name, "blk_major_name");
if (VALID_STRUCT(blk_major_name)) {
MEMBER_OFFSET_INIT(blk_major_name_next, "blk_major_name",
"next");
MEMBER_OFFSET_INIT(blk_major_name_name, "blk_major_name",
"name");
MEMBER_OFFSET_INIT(blk_major_name_major, "blk_major_name",
"major");
}
STRUCT_SIZE_INIT(kmem_slab_s, "kmem_slab_s");
STRUCT_SIZE_INIT(slab_s, "slab_s");
STRUCT_SIZE_INIT(slab, "slab");
STRUCT_SIZE_INIT(kmem_cache_s, "kmem_cache_s");
STRUCT_SIZE_INIT(pgd_t, "pgd_t");
/*
* slab: overload struct slab over struct page
* https://lkml.org/lkml/2013/10/16/155
*/
if (MEMBER_EXISTS("kmem_cache", "freelist_cache")) {
vt->flags |= SLAB_OVERLOAD_PAGE;
ANON_MEMBER_OFFSET_INIT(page_s_mem, "page", "s_mem");
ANON_MEMBER_OFFSET_INIT(page_freelist, "page", "freelist");
ANON_MEMBER_OFFSET_INIT(page_active, "page", "active");
}
if (!VALID_STRUCT(kmem_slab_s) && VALID_STRUCT(slab_s)) {
vt->flags |= PERCPU_KMALLOC_V1;
MEMBER_OFFSET_INIT(kmem_cache_s_num, "kmem_cache_s", "num");
MEMBER_OFFSET_INIT(kmem_cache_s_next, "kmem_cache_s", "next");
MEMBER_OFFSET_INIT(kmem_cache_s_name, "kmem_cache_s", "name");
MEMBER_OFFSET_INIT(kmem_cache_s_objsize,
"kmem_cache_s", "objsize");
MEMBER_OFFSET_INIT(kmem_cache_s_flags, "kmem_cache_s", "flags");
MEMBER_OFFSET_INIT(kmem_cache_s_gfporder,
"kmem_cache_s", "gfporder");
MEMBER_OFFSET_INIT(kmem_cache_s_slabs,
"kmem_cache_s", "slabs");
MEMBER_OFFSET_INIT(kmem_cache_s_slabs_full,
"kmem_cache_s", "slabs_full");
MEMBER_OFFSET_INIT(kmem_cache_s_slabs_partial,
"kmem_cache_s", "slabs_partial");
MEMBER_OFFSET_INIT(kmem_cache_s_slabs_free,
"kmem_cache_s", "slabs_free");
MEMBER_OFFSET_INIT(kmem_cache_s_cpudata,
"kmem_cache_s", "cpudata");
ARRAY_LENGTH_INIT(len, NULL, "kmem_cache_s.cpudata", NULL, 0);
MEMBER_OFFSET_INIT(kmem_cache_s_colour_off,
"kmem_cache_s", "colour_off");
MEMBER_OFFSET_INIT(slab_s_list, "slab_s", "list");
MEMBER_OFFSET_INIT(slab_s_s_mem, "slab_s", "s_mem");
MEMBER_OFFSET_INIT(slab_s_inuse, "slab_s", "inuse");
MEMBER_OFFSET_INIT(slab_s_free, "slab_s", "free");
MEMBER_OFFSET_INIT(cpucache_s_avail, "cpucache_s", "avail");
MEMBER_OFFSET_INIT(cpucache_s_limit, "cpucache_s", "limit");
STRUCT_SIZE_INIT(cpucache_s, "cpucache_s");
} else if (!VALID_STRUCT(kmem_slab_s) &&
!VALID_STRUCT(slab_s) &&
(VALID_STRUCT(slab) || (vt->flags & SLAB_OVERLOAD_PAGE))) {
vt->flags |= PERCPU_KMALLOC_V2;
if (VALID_STRUCT(kmem_cache_s)) {
MEMBER_OFFSET_INIT(kmem_cache_s_num, "kmem_cache_s", "num");
MEMBER_OFFSET_INIT(kmem_cache_s_next, "kmem_cache_s", "next");
MEMBER_OFFSET_INIT(kmem_cache_s_name, "kmem_cache_s", "name");
MEMBER_OFFSET_INIT(kmem_cache_s_colour_off, "kmem_cache_s",
"colour_off");
MEMBER_OFFSET_INIT(kmem_cache_s_objsize, "kmem_cache_s",
"objsize");
MEMBER_OFFSET_INIT(kmem_cache_s_flags, "kmem_cache_s", "flags");
MEMBER_OFFSET_INIT(kmem_cache_s_gfporder,
"kmem_cache_s", "gfporder");
MEMBER_OFFSET_INIT(kmem_cache_s_lists, "kmem_cache_s", "lists");
MEMBER_OFFSET_INIT(kmem_cache_s_array, "kmem_cache_s", "array");
ARRAY_LENGTH_INIT(len, NULL, "kmem_cache_s.array", NULL, 0);
} else {
STRUCT_SIZE_INIT(kmem_cache_s, "kmem_cache");
MEMBER_OFFSET_INIT(kmem_cache_s_num, "kmem_cache", "num");
MEMBER_OFFSET_INIT(kmem_cache_s_next, "kmem_cache", "next");
if (INVALID_MEMBER(kmem_cache_s_next)) {
/*
* slab/slub unification starting in Linux 3.6.
*/
MEMBER_OFFSET_INIT(kmem_cache_s_next, "kmem_cache", "list");
MEMBER_OFFSET_INIT(kmem_cache_list, "kmem_cache", "list");
MEMBER_OFFSET_INIT(kmem_cache_name, "kmem_cache", "name");
MEMBER_OFFSET_INIT(kmem_cache_size, "kmem_cache", "size");
STRUCT_SIZE_INIT(kmem_cache, "kmem_cache");
}
MEMBER_OFFSET_INIT(kmem_cache_s_name, "kmem_cache", "name");
MEMBER_OFFSET_INIT(kmem_cache_s_colour_off, "kmem_cache",
"colour_off");
if (MEMBER_EXISTS("kmem_cache", "objsize"))
MEMBER_OFFSET_INIT(kmem_cache_s_objsize, "kmem_cache",
"objsize");
else if (MEMBER_EXISTS("kmem_cache", "buffer_size"))
MEMBER_OFFSET_INIT(kmem_cache_s_objsize, "kmem_cache",
"buffer_size");
else if (MEMBER_EXISTS("kmem_cache", "size"))
MEMBER_OFFSET_INIT(kmem_cache_s_objsize, "kmem_cache",
"size");
MEMBER_OFFSET_INIT(kmem_cache_s_flags, "kmem_cache", "flags");
MEMBER_OFFSET_INIT(kmem_cache_s_gfporder,
"kmem_cache", "gfporder");
if (MEMBER_EXISTS("kmem_cache", "lists"))
MEMBER_OFFSET_INIT(kmem_cache_s_lists, "kmem_cache", "lists");
else if (MEMBER_EXISTS("kmem_cache", "nodelists") ||
MEMBER_EXISTS("kmem_cache", "node")) {
nodelists_field = MEMBER_EXISTS("kmem_cache", "node") ?
"node" : "nodelists";
vt->flags |= PERCPU_KMALLOC_V2_NODES;
MEMBER_OFFSET_INIT(kmem_cache_s_lists, "kmem_cache", nodelists_field);
if (MEMBER_TYPE("kmem_cache", nodelists_field) == TYPE_CODE_PTR) {
int nr_node_ids;
/*
* nodelists now a pointer to an outside array
*/
vt->flags |= NODELISTS_IS_PTR;
if (kernel_symbol_exists("nr_node_ids")) {
get_symbol_data("nr_node_ids", sizeof(int),
&nr_node_ids);
vt->kmem_cache_len_nodes = nr_node_ids;
} else
vt->kmem_cache_len_nodes = 1;
} else {
/*
* This should never happen with kmem_cache.node,
* only with kmem_cache.nodelists
*/
ARRAY_LENGTH_INIT(vt->kmem_cache_len_nodes, NULL,
"kmem_cache.nodelists", NULL, 0);
}
}
MEMBER_OFFSET_INIT(kmem_cache_s_array, "kmem_cache", "array");
ARRAY_LENGTH_INIT(len, NULL, "kmem_cache.array", NULL, 0);
}
if (VALID_STRUCT(slab)) {
MEMBER_OFFSET_INIT(slab_list, "slab", "list");
MEMBER_OFFSET_INIT(slab_s_mem, "slab", "s_mem");
MEMBER_OFFSET_INIT(slab_inuse, "slab", "inuse");
MEMBER_OFFSET_INIT(slab_free, "slab", "free");
/*
* slab members were moved to an anonymous union in 2.6.39.
*/
if (INVALID_MEMBER(slab_list))
ANON_MEMBER_OFFSET_INIT(slab_list, "slab", "list");
if (INVALID_MEMBER(slab_s_mem))
ANON_MEMBER_OFFSET_INIT(slab_s_mem, "slab", "s_mem");
if (INVALID_MEMBER(slab_inuse))
ANON_MEMBER_OFFSET_INIT(slab_inuse, "slab", "inuse");
if (INVALID_MEMBER(slab_free))
ANON_MEMBER_OFFSET_INIT(slab_free, "slab", "free");
}
MEMBER_OFFSET_INIT(array_cache_avail, "array_cache", "avail");
MEMBER_OFFSET_INIT(array_cache_limit, "array_cache", "limit");
STRUCT_SIZE_INIT(array_cache, "array_cache");
/*
* kmem_list3 renamed to kmem_cache_node in kernel 3.11-rc1
*/
kmem_cache_node_struct = STRUCT_EXISTS("kmem_cache_node") ?
"kmem_cache_node" : "kmem_list3";
MEMBER_OFFSET_INIT(kmem_list3_slabs_partial,
kmem_cache_node_struct, "slabs_partial");
MEMBER_OFFSET_INIT(kmem_list3_slabs_full,
kmem_cache_node_struct, "slabs_full");
MEMBER_OFFSET_INIT(kmem_list3_slabs_free,
kmem_cache_node_struct, "slabs_free");
MEMBER_OFFSET_INIT(kmem_list3_free_objects,
kmem_cache_node_struct, "free_objects");
MEMBER_OFFSET_INIT(kmem_list3_shared, kmem_cache_node_struct, "shared");
/*
* Common to slab/slub
*/
ANON_MEMBER_OFFSET_INIT(page_slab, "page", "slab_cache");
ANON_MEMBER_OFFSET_INIT(page_slab_page, "page", "slab_page");
ANON_MEMBER_OFFSET_INIT(page_first_page, "page", "first_page");
} else if (MEMBER_EXISTS("kmem_cache", "cpu_slab") &&
STRUCT_EXISTS("kmem_cache_node")) {
vt->flags |= KMALLOC_SLUB;
STRUCT_SIZE_INIT(kmem_cache, "kmem_cache");
MEMBER_OFFSET_INIT(kmem_cache_size, "kmem_cache", "size");
MEMBER_OFFSET_INIT(kmem_cache_objsize, "kmem_cache", "objsize");
if (INVALID_MEMBER(kmem_cache_objsize))
MEMBER_OFFSET_INIT(kmem_cache_objsize, "kmem_cache",
"object_size");
MEMBER_OFFSET_INIT(kmem_cache_offset, "kmem_cache", "offset");
MEMBER_OFFSET_INIT(kmem_cache_order, "kmem_cache", "order");
MEMBER_OFFSET_INIT(kmem_cache_local_node, "kmem_cache", "local_node");
MEMBER_OFFSET_INIT(kmem_cache_objects, "kmem_cache", "objects");
MEMBER_OFFSET_INIT(kmem_cache_inuse, "kmem_cache", "inuse");
MEMBER_OFFSET_INIT(kmem_cache_align, "kmem_cache", "align");
MEMBER_OFFSET_INIT(kmem_cache_node, "kmem_cache", "node");
MEMBER_OFFSET_INIT(kmem_cache_cpu_slab, "kmem_cache", "cpu_slab");
MEMBER_OFFSET_INIT(kmem_cache_list, "kmem_cache", "list");
MEMBER_OFFSET_INIT(kmem_cache_name, "kmem_cache", "name");
MEMBER_OFFSET_INIT(kmem_cache_flags, "kmem_cache", "flags");
MEMBER_OFFSET_INIT(kmem_cache_cpu_freelist, "kmem_cache_cpu", "freelist");
MEMBER_OFFSET_INIT(kmem_cache_cpu_page, "kmem_cache_cpu", "page");
MEMBER_OFFSET_INIT(kmem_cache_cpu_node, "kmem_cache_cpu", "node");
ANON_MEMBER_OFFSET_INIT(page_inuse, "page", "inuse");
ANON_MEMBER_OFFSET_INIT(page_offset, "page", "offset");
ANON_MEMBER_OFFSET_INIT(page_slab, "page", "slab");
if (INVALID_MEMBER(page_slab))
ANON_MEMBER_OFFSET_INIT(page_slab, "page", "slab_cache");
ANON_MEMBER_OFFSET_INIT(page_slab_page, "page", "slab_page");
ANON_MEMBER_OFFSET_INIT(page_first_page, "page", "first_page");
ANON_MEMBER_OFFSET_INIT(page_freelist, "page", "freelist");
if (INVALID_MEMBER(kmem_cache_objects)) {
MEMBER_OFFSET_INIT(kmem_cache_oo, "kmem_cache", "oo");
ANON_MEMBER_OFFSET_INIT(page_objects, "page", "objects");
}
if (VALID_MEMBER(kmem_cache_node)) {
ARRAY_LENGTH_INIT(len, NULL, "kmem_cache.node", NULL, 0);
vt->flags |= CONFIG_NUMA;
}
ARRAY_LENGTH_INIT(len, NULL, "kmem_cache.cpu_slab", NULL, 0);
STRUCT_SIZE_INIT(kmem_cache_node, "kmem_cache_node");
STRUCT_SIZE_INIT(kmem_cache_cpu, "kmem_cache_cpu");
MEMBER_OFFSET_INIT(kmem_cache_node_nr_partial,
"kmem_cache_node", "nr_partial");
MEMBER_OFFSET_INIT(kmem_cache_node_nr_slabs,
"kmem_cache_node", "nr_slabs");
MEMBER_OFFSET_INIT(kmem_cache_node_partial,
"kmem_cache_node", "partial");
MEMBER_OFFSET_INIT(kmem_cache_node_full,
"kmem_cache_node", "full");
} else {
MEMBER_OFFSET_INIT(kmem_cache_s_c_nextp,
"kmem_cache_s", "c_nextp");
MEMBER_OFFSET_INIT(kmem_cache_s_c_name,
"kmem_cache_s", "c_name");
MEMBER_OFFSET_INIT(kmem_cache_s_c_num,
"kmem_cache_s", "c_num");
MEMBER_OFFSET_INIT(kmem_cache_s_c_org_size,
"kmem_cache_s", "c_org_size");
MEMBER_OFFSET_INIT(kmem_cache_s_c_flags,
"kmem_cache_s", "c_flags");
MEMBER_OFFSET_INIT(kmem_cache_s_c_offset,
"kmem_cache_s", "c_offset");
MEMBER_OFFSET_INIT(kmem_cache_s_c_firstp,
"kmem_cache_s", "c_firstp");
MEMBER_OFFSET_INIT(kmem_cache_s_c_gfporder,
"kmem_cache_s", "c_gfporder");
MEMBER_OFFSET_INIT(kmem_cache_s_c_magic,
"kmem_cache_s", "c_magic");
MEMBER_OFFSET_INIT(kmem_cache_s_c_align,
"kmem_cache_s", "c_align");
MEMBER_OFFSET_INIT(kmem_slab_s_s_nextp,
"kmem_slab_s", "s_nextp");
MEMBER_OFFSET_INIT(kmem_slab_s_s_freep,
"kmem_slab_s", "s_freep");
MEMBER_OFFSET_INIT(kmem_slab_s_s_inuse,
"kmem_slab_s", "s_inuse");
MEMBER_OFFSET_INIT(kmem_slab_s_s_mem,
"kmem_slab_s", "s_mem");
MEMBER_OFFSET_INIT(kmem_slab_s_s_index,
"kmem_slab_s", "s_index");
MEMBER_OFFSET_INIT(kmem_slab_s_s_offset,
"kmem_slab_s", "s_offset");
MEMBER_OFFSET_INIT(kmem_slab_s_s_magic,
"kmem_slab_s", "s_magic");
}
if (!kt->kernel_NR_CPUS) {
if (enumerator_value("WORK_CPU_UNBOUND", (long *)&value1))
kt->kernel_NR_CPUS = (int)value1;
else if ((i = get_array_length("__per_cpu_offset", NULL, 0)))
kt->kernel_NR_CPUS = i;
else if (ARRAY_LENGTH(kmem_cache_s_cpudata))
kt->kernel_NR_CPUS = ARRAY_LENGTH(kmem_cache_s_cpudata);
else if (ARRAY_LENGTH(kmem_cache_s_array))
kt->kernel_NR_CPUS = ARRAY_LENGTH(kmem_cache_s_array);
else if (ARRAY_LENGTH(kmem_cache_cpu_slab))
kt->kernel_NR_CPUS = ARRAY_LENGTH(kmem_cache_cpu_slab);
}
if (CRASHDEBUG(1))
fprintf(fp, "kernel NR_CPUS: %d %s\n", kt->kernel_NR_CPUS,
kt->kernel_NR_CPUS ? "" : "(unknown)");
if (kt->kernel_NR_CPUS > NR_CPUS) {
error(WARNING,
"kernel-configured NR_CPUS (%d) greater than compiled-in NR_CPUS (%d)\n",
kt->kernel_NR_CPUS, NR_CPUS);
error(FATAL, "recompile crash with larger NR_CPUS\n");
}
if (machdep->init_kernel_pgd)
machdep->init_kernel_pgd();
else if (symbol_exists("swapper_pg_dir")) {
value1 = symbol_value("swapper_pg_dir");
for (i = 0; i < NR_CPUS; i++)
vt->kernel_pgd[i] = value1;
} else if (symbol_exists("cpu_pgd")) {
len = get_array_length("cpu_pgd", &dimension, 0);
if ((len == NR_CPUS) && (dimension == machdep->ptrs_per_pgd)) {
value1 = symbol_value("cpu_pgd");
for (i = 0; i < NR_CPUS; i++) {
value2 = i *
(SIZE(pgd_t) * machdep->ptrs_per_pgd);
vt->kernel_pgd[i] = value1 + value2;
}
error(WARNING,
"no swapper_pg_dir: using first entry of cpu_pgd[%d][%d]\n\n",
dimension, len);
} else {
error(WARNING,
"unrecognized dimensions: cpu_pgd[%d][%d]\n",
dimension, len);
value1 = symbol_value("cpu_pgd");
for (i = 0; i < NR_CPUS; i++)
vt->kernel_pgd[i] = value1;
error(WARNING,
"no swapper_pg_dir: using first entry of cpu_pgd[%d][%d]\n\n",
dimension, len);
}
} else
error(FATAL, "no swapper_pg_dir or cpu_pgd symbols exist?\n");
get_symbol_data("high_memory", sizeof(ulong), &vt->high_memory);
if (kernel_symbol_exists("mem_section"))
vt->flags |= SPARSEMEM;
else if (kernel_symbol_exists("mem_map")) {
get_symbol_data("mem_map", sizeof(char *), &vt->mem_map);
vt->flags |= FLATMEM;
} else
vt->flags |= DISCONTIGMEM;
sparse_mem_init();
vt->vmalloc_start = machdep->vmalloc_start();
if (IS_VMALLOC_ADDR(vt->mem_map))
vt->flags |= V_MEM_MAP;
vt->total_pages = BTOP(VTOP(vt->high_memory));
switch (get_syment_array("totalram_pages", sp_array, 2))
{
case 1:
get_symbol_data("totalram_pages", sizeof(ulong),
&vt->totalram_pages);
break;
case 2:
if (!(readmem(sp_array[0]->value, KVADDR,
&value1, sizeof(ulong),
"totalram_pages #1", RETURN_ON_ERROR)))
break;
if (!(readmem(sp_array[1]->value, KVADDR,
&value2, sizeof(ulong),
"totalram_pages #2", RETURN_ON_ERROR)))
break;
vt->totalram_pages = MAX(value1, value2);
break;
}
if (symbol_exists("totalhigh_pages")) {
switch (get_syment_array("totalhigh_pages", sp_array, 2))
{
case 1:
get_symbol_data("totalhigh_pages", sizeof(ulong),
&vt->totalhigh_pages);
break;
case 2:
if (!(readmem(sp_array[0]->value, KVADDR,
&value1, sizeof(ulong),
"totalhigh_pages #1", RETURN_ON_ERROR)))
break;
if (!(readmem(sp_array[1]->value, KVADDR,
&value2, sizeof(ulong),
"totalhigh_pages #2", RETURN_ON_ERROR)))
break;
vt->totalhigh_pages = MAX(value1, value2);
break;
}
vt->total_pages += vt->totalhigh_pages;
}
if (symbol_exists("num_physpages"))
get_symbol_data("num_physpages", sizeof(ulong),
&vt->num_physpages);
if (kernel_symbol_exists("mem_map"))
get_symbol_data("max_mapnr", sizeof(ulong), &vt->max_mapnr);
if (kernel_symbol_exists("nr_swapfiles"))
get_symbol_data("nr_swapfiles", sizeof(unsigned int),
&vt->nr_swapfiles);
STRUCT_SIZE_INIT(page, "page");
STRUCT_SIZE_INIT(free_area, "free_area");
STRUCT_SIZE_INIT(free_area_struct, "free_area_struct");
STRUCT_SIZE_INIT(zone, "zone");
STRUCT_SIZE_INIT(zone_struct, "zone_struct");
STRUCT_SIZE_INIT(kmem_bufctl_t, "kmem_bufctl_t");
STRUCT_SIZE_INIT(swap_info_struct, "swap_info_struct");
STRUCT_SIZE_INIT(mm_struct, "mm_struct");
STRUCT_SIZE_INIT(vm_area_struct, "vm_area_struct");
STRUCT_SIZE_INIT(pglist_data, "pglist_data");
if (VALID_STRUCT(pglist_data)) {
vt->flags |= ZONES;
if (symbol_exists("pgdat_list") && !IS_SPARSEMEM())
vt->flags |= NODES;
/*
* Determine the number of nodes the best way possible,
* starting with a default of 1.
*/
vt->numnodes = 1;
if (symbol_exists("numnodes"))
get_symbol_data("numnodes", sizeof(int), &vt->numnodes);
if (get_nodes_online())
vt->flags |= NODES_ONLINE;
MEMBER_OFFSET_INIT(pglist_data_node_zones,
"pglist_data", "node_zones");
MEMBER_OFFSET_INIT(pglist_data_node_mem_map,
"pglist_data", "node_mem_map");
MEMBER_OFFSET_INIT(pglist_data_node_start_paddr,
"pglist_data", "node_start_paddr");
MEMBER_OFFSET_INIT(pglist_data_node_start_mapnr,
"pglist_data", "node_start_mapnr");
MEMBER_OFFSET_INIT(pglist_data_node_size,
"pglist_data", "node_size");
MEMBER_OFFSET_INIT(pglist_data_node_id,
"pglist_data", "node_id");
MEMBER_OFFSET_INIT(pglist_data_node_next,
"pglist_data", "node_next");
MEMBER_OFFSET_INIT(pglist_data_bdata, "pglist_data", "bdata");
MEMBER_OFFSET_INIT(pglist_data_nr_zones, "pglist_data",
"nr_zones");
MEMBER_OFFSET_INIT(pglist_data_node_start_pfn, "pglist_data",
"node_start_pfn");
MEMBER_OFFSET_INIT(pglist_data_pgdat_next, "pglist_data",
"pgdat_next");
MEMBER_OFFSET_INIT(pglist_data_node_present_pages,
"pglist_data", "node_present_pages");
MEMBER_OFFSET_INIT(pglist_data_node_spanned_pages,
"pglist_data", "node_spanned_pages");
ARRAY_LENGTH_INIT(vt->nr_zones, pglist_data_node_zones,
"pglist_data.node_zones", NULL,
SIZE_OPTION(zone_struct, zone));
vt->ZONE_HIGHMEM = vt->nr_zones - 1;
if (VALID_STRUCT(zone_struct)) {
MEMBER_OFFSET_INIT(zone_struct_free_pages,
"zone_struct", "free_pages");
MEMBER_OFFSET_INIT(zone_struct_free_area,
"zone_struct", "free_area");
MEMBER_OFFSET_INIT(zone_struct_zone_pgdat,
"zone_struct", "zone_pgdat");
MEMBER_OFFSET_INIT(zone_struct_name, "zone_struct",
"name");
MEMBER_OFFSET_INIT(zone_struct_size, "zone_struct",
"size");
if (INVALID_MEMBER(zone_struct_size))
MEMBER_OFFSET_INIT(zone_struct_memsize,
"zone_struct", "memsize");
MEMBER_OFFSET_INIT(zone_struct_zone_start_pfn,
"zone_struct", "zone_start_pfn");
MEMBER_OFFSET_INIT(zone_struct_zone_start_paddr,
"zone_struct", "zone_start_paddr");
MEMBER_OFFSET_INIT(zone_struct_zone_start_mapnr,
"zone_struct", "zone_start_mapnr");
MEMBER_OFFSET_INIT(zone_struct_zone_mem_map,
"zone_struct", "zone_mem_map");
MEMBER_OFFSET_INIT(zone_struct_inactive_clean_pages,
"zone_struct", "inactive_clean_pages");
MEMBER_OFFSET_INIT(zone_struct_inactive_clean_list,
"zone_struct", "inactive_clean_list");
ARRAY_LENGTH_INIT(vt->nr_free_areas,
zone_struct_free_area, "zone_struct.free_area",
NULL, SIZE(free_area_struct));
MEMBER_OFFSET_INIT(zone_struct_inactive_dirty_pages,
"zone_struct", "inactive_dirty_pages");
MEMBER_OFFSET_INIT(zone_struct_active_pages,
"zone_struct", "active_pages");
MEMBER_OFFSET_INIT(zone_struct_pages_min,
"zone_struct", "pages_min");
MEMBER_OFFSET_INIT(zone_struct_pages_low,
"zone_struct", "pages_low");
MEMBER_OFFSET_INIT(zone_struct_pages_high,
"zone_struct", "pages_high");
vt->dump_free_pages = dump_free_pages_zones_v1;
} else if (VALID_STRUCT(zone)) {
MEMBER_OFFSET_INIT(zone_vm_stat, "zone", "vm_stat");
MEMBER_OFFSET_INIT(zone_free_pages, "zone", "free_pages");
if (INVALID_MEMBER(zone_free_pages) &&
VALID_MEMBER(zone_vm_stat)) {
long nr_free_pages = 0;
if (!enumerator_value("NR_FREE_PAGES", &nr_free_pages))
error(WARNING,
"cannot determine NR_FREE_PAGES enumerator\n");
ASSIGN_OFFSET(zone_free_pages) = OFFSET(zone_vm_stat) +
(nr_free_pages * sizeof(long));
}
MEMBER_OFFSET_INIT(zone_free_area,
"zone", "free_area");
MEMBER_OFFSET_INIT(zone_zone_pgdat,
"zone", "zone_pgdat");
MEMBER_OFFSET_INIT(zone_name, "zone",
"name");
MEMBER_OFFSET_INIT(zone_zone_mem_map,
"zone", "zone_mem_map");
MEMBER_OFFSET_INIT(zone_zone_start_pfn,
"zone", "zone_start_pfn");
MEMBER_OFFSET_INIT(zone_spanned_pages,
"zone", "spanned_pages");
MEMBER_OFFSET_INIT(zone_present_pages,
"zone", "present_pages");
MEMBER_OFFSET_INIT(zone_pages_min,
"zone", "pages_min");
MEMBER_OFFSET_INIT(zone_pages_low,
"zone", "pages_low");
MEMBER_OFFSET_INIT(zone_pages_high,
"zone", "pages_high");
MEMBER_OFFSET_INIT(zone_watermark,
"zone", "watermark");
MEMBER_OFFSET_INIT(zone_nr_active,
"zone", "nr_active");
MEMBER_OFFSET_INIT(zone_nr_inactive,
"zone", "nr_inactive");
MEMBER_OFFSET_INIT(zone_all_unreclaimable,
"zone", "all_unreclaimable");
MEMBER_OFFSET_INIT(zone_flags, "zone", "flags");
MEMBER_OFFSET_INIT(zone_pages_scanned, "zone",
"pages_scanned");
ARRAY_LENGTH_INIT(vt->nr_free_areas, zone_free_area,
"zone.free_area", NULL, SIZE(free_area));
vt->dump_free_pages = dump_free_pages_zones_v2;
}
} else
vt->numnodes = 1;
node_table_init();
sprintf(buf, "%llx", (ulonglong)
MAX((uint64_t)vt->max_mapnr * PAGESIZE(),
machdep->memory_size()));
vt->paddr_prlen = strlen(buf);
if (vt->flags & PERCPU_KMALLOC_V1)
vt->dump_kmem_cache = dump_kmem_cache_percpu_v1;
else if (vt->flags & PERCPU_KMALLOC_V2)
vt->dump_kmem_cache = dump_kmem_cache_percpu_v2;
else if (vt->flags & KMALLOC_SLUB)
vt->dump_kmem_cache = dump_kmem_cache_slub;
else
vt->dump_kmem_cache = dump_kmem_cache;
if (!(vt->flags & (NODES|ZONES))) {
get_array_length("free_area", &dimension, 0);
if (dimension)
vt->dump_free_pages = dump_multidimensional_free_pages;
else
vt->dump_free_pages = dump_free_pages;
}
if (!(vt->vma_cache = (char *)malloc(SIZE(vm_area_struct)*VMA_CACHE)))
error(FATAL, "cannot malloc vm_area_struct cache\n");
if (symbol_exists("page_hash_bits")) {
unsigned int page_hash_bits;
get_symbol_data("page_hash_bits", sizeof(unsigned int),
&page_hash_bits);
len = (1 << page_hash_bits);
builtin_array_length("page_hash_table", len, NULL);
get_symbol_data("page_hash_table", sizeof(void *),
&vt->page_hash_table);
vt->page_hash_table_len = len;
STRUCT_SIZE_INIT(page_cache_bucket, "page_cache_bucket");
if (VALID_STRUCT(page_cache_bucket))
MEMBER_OFFSET_INIT(page_cache_bucket_chain,
"page_cache_bucket", "chain");
} else if (symbol_exists("page_hash_table")) {
vt->page_hash_table = symbol_value("page_hash_table");
vt->page_hash_table_len = 0;
} else if (CRASHDEBUG(1))
error(NOTE, "page_hash_table does not exist in this kernel\n");
kmem_cache_init();
page_flags_init();
vt->flags |= VM_INIT;
}
/*
* This command displays the contents of memory, with the output formatted
* in several different manners. The starting address may be entered either
* symbolically or by address. The default output size is the size of a long
* data type, and the default output format is hexadecimal. When hexadecimal
* output is used, the output will be accompanied by an ASCII translation.
* These are the options:
*
* -p address argument is a physical address.
* -u address argument is a user virtual address.
* -d display output in signed decimal format (default is hexadecimal).
* -D display output in unsigned decimal format (default is hexadecimal).
* -s displays output symbolically when appropriate.
* -8 display output in 8-bit values.
* -16 display output in 16-bit values.
* -32 display output in 32-bit values (default on 32-bit machines).
* -64 display output in 64-bit values (default on 64-bit machines).
*
* The default number of items to display is 1, but a count argument, if any,
* must follow the address.
*/
void
cmd_rd(void)
{
int c, memtype;
ulong flag;
long count;
ulonglong addr, endaddr;
ulong offset;
struct syment *sp;
FILE *tmpfp;
char *outputfile;
flag = HEXADECIMAL|DISPLAY_DEFAULT;
endaddr = 0;
offset = 0;
memtype = KVADDR;
tmpfp = NULL;
outputfile = NULL;
count = -1;
while ((c = getopt(argcnt, args, "axme:r:pfudDusSNo:81:3:6:")) != EOF) {
switch(c)
{
case 'a':
flag &= ~DISPLAY_TYPES;
flag |= DISPLAY_ASCII;
break;
case '8':
flag &= ~DISPLAY_TYPES;
flag |= DISPLAY_8;
break;
case '1':
if (!STREQ(optarg, "6")) {
error(INFO,
"invalid option: %c%s\n", c, optarg);
argerrs++;
} else {
flag &= ~DISPLAY_TYPES;
flag |= DISPLAY_16;
}
break;
case '3':
if (!STREQ(optarg, "2")) {
error(INFO,
"invalid option: %c%s\n", c, optarg);
argerrs++;
} else {
flag &= ~DISPLAY_TYPES;
flag |= DISPLAY_32;
}
break;
case '6':
if (!STREQ(optarg, "4")) {
error(INFO,
"invalid option: %c%s\n", c, optarg);
argerrs++;
} else {
flag &= ~DISPLAY_TYPES;
flag |= DISPLAY_64;
}
break;
case 'e':
endaddr = htoll(optarg, FAULT_ON_ERROR, NULL);
break;
case 'r':
flag &= ~DISPLAY_TYPES;
flag |= DISPLAY_RAW;
outputfile = optarg;
if ((tmpfp = fopen(outputfile, "w")) == NULL)
error(FATAL, "cannot open output file: %s\n",
outputfile);
set_tmpfile2(tmpfp);
break;
case 's':
case 'S':
if (flag & DISPLAY_DEFAULT) {
flag |= SYMBOLIC;
if (c == 'S') {
if (flag & SLAB_CACHE)
flag |= SLAB_CACHE2;
else
flag |= SLAB_CACHE;
}
} else {
error(INFO, "-%c option"
" is only allowed with %d-bit display\n",
c, DISPLAY_DEFAULT == DISPLAY_64 ?
64 : 32);
argerrs++;
}
break;
case 'o':
offset = stol(optarg, FAULT_ON_ERROR, NULL);
flag |= SHOW_OFFSET;
break;
case 'p':
memtype &= ~(UVADDR|KVADDR|XENMACHADDR|FILEADDR);
memtype = PHYSADDR;
break;
case 'u':
memtype &= ~(KVADDR|PHYSADDR|XENMACHADDR|FILEADDR);
memtype = UVADDR;
break;
case 'd':
flag &= ~(HEXADECIMAL|DECIMAL);
flag |= DECIMAL;
break;
case 'D':
flag &= ~(HEXADECIMAL|UDECIMAL);
flag |= UDECIMAL;
break;
case 'm':
if (!(kt->flags & ARCH_XEN))
error(FATAL, "-m option only applies to xen architecture\n");
memtype &= ~(UVADDR|KVADDR|FILEADDR);
memtype = XENMACHADDR;
break;
case 'f':
if (!pc->dumpfile)
error(FATAL,
"-f option requires a dumpfile\n");
memtype &= ~(KVADDR|UVADDR|PHYSADDR|XENMACHADDR);
memtype = FILEADDR;
break;
case 'x':
flag |= NO_ASCII;
break;
case 'N':
flag |= NET_ENDIAN;
break;
default:
argerrs++;
break;
}
}
if (argerrs || !args[optind])
cmd_usage(pc->curcmd, SYNOPSIS);
if (*args[optind] == '(')
addr = evall(args[optind], FAULT_ON_ERROR, NULL);
else if (hexadecimal(args[optind], 0))
addr = htoll(args[optind], FAULT_ON_ERROR, NULL);
else if ((sp = symbol_search(args[optind])))
addr = (ulonglong)sp->value;
else {
fprintf(fp, "symbol not found: %s\n", args[optind]);
fprintf(fp, "possible alternatives:\n");
if (!symbol_query(args[optind], " ", NULL))
fprintf(fp, " (none found)\n");
return;
}
if (flag & SHOW_OFFSET)
addr += offset;
if (args[++optind])
count = stol(args[optind], FAULT_ON_ERROR, NULL);
if (count == -1) {
if (endaddr) {
long bcnt;
if (endaddr <= addr)
error(FATAL, "invalid ending address: %llx\n",
endaddr);
bcnt = endaddr - addr;
switch (flag & (DISPLAY_TYPES))
{
case DISPLAY_64:
count = bcnt/8;
break;
case DISPLAY_32:
count = bcnt/4;
break;
case DISPLAY_16:
count = bcnt/2;
break;
case DISPLAY_8:
case DISPLAY_ASCII:
case DISPLAY_RAW:
count = bcnt;
break;
}
if (bcnt == 0)
count = 1;
} else {
if ((flag & DISPLAY_TYPES) == DISPLAY_RAW)
error(FATAL, "-r option requires either a count"
" argument or the -e option\n");
count = (flag & DISPLAY_ASCII) ? ASCII_UNLIMITED : 1;
}
} else if (endaddr)
error(WARNING,
"ending address ignored when count is specified\n");
if ((flag & HEXADECIMAL) && !(flag & SYMBOLIC) && !(flag & NO_ASCII) &&
!(flag & DISPLAY_ASCII))
flag |= ASCII_ENDLINE;
if (memtype == KVADDR) {
if (!COMMON_VADDR_SPACE() && !IS_KVADDR(addr))
memtype = UVADDR;
}
display_memory(addr, count, flag, memtype, outputfile);
}
/*
* display_memory() does the work for cmd_rd(), but can (and is) called by
* other routines that want to dump raw data. Based upon the flag, the
* output format is tailored to fit in an 80-character line. Hexadecimal
* output is accompanied by an end-of-line ASCII translation.
*/
#define MAX_HEXCHARS_PER_LINE (32)
/* line locations where ASCII output starts */
#define ASCII_START_8 (51 + VADDR_PRLEN)
#define ASCII_START_16 (43 + VADDR_PRLEN)
#define ASCII_START_32 (39 + VADDR_PRLEN)
#define ASCII_START_64 (37 + VADDR_PRLEN)
#define ENTRIES_8 (16) /* number of entries per line per size */
#define ENTRIES_16 (8)
#define ENTRIES_32 (4)
#define ENTRIES_64 (2)
struct memloc { /* common holder of read memory */
uint8_t u8;
uint16_t u16;
uint32_t u32;
uint64_t u64;
uint64_t limit64;
};
static void
display_memory(ulonglong addr, long count, ulong flag, int memtype, void *opt)
{
int i, a, j;
size_t typesz, sz;
long written;
void *location;
char readtype[20];
char *addrtype;
struct memloc mem;
int displayed, per_line;
int hx, lost;
char hexchars[MAX_HEXCHARS_PER_LINE+1];
char ch;
int linelen;
char buf[BUFSIZE];
char slab[BUFSIZE];
int ascii_start;
ulong error_handle;
char *hex_64_fmt = BITS32() ? "%.*llx " : "%.*lx ";
char *dec_64_fmt = BITS32() ? "%12lld " : "%15ld ";
char *dec_u64_fmt = BITS32() ? "%12llu " : "%20lu ";
if (count <= 0)
error(FATAL, "invalid count request: %ld\n", count);
switch (memtype)
{
case KVADDR:
addrtype = "KVADDR";
break;
case UVADDR:
addrtype = "UVADDR";
break;
case PHYSADDR:
addrtype = "PHYSADDR";
break;
case XENMACHADDR:
addrtype = "XENMACHADDR";
break;
case FILEADDR:
addrtype = "FILEADDR";
break;
default:
addrtype = NULL;
break;
}
if (CRASHDEBUG(4))
fprintf(fp, "<addr: %llx count: %ld flag: %lx (%s)>\n",
addr, count, flag, addrtype);
if (flag & DISPLAY_RAW) {
for (written = 0; written < count; written += sz) {
sz = BUFSIZE > (count - written) ?
(size_t)(count - written) : (size_t)BUFSIZE;
readmem(addr + written, memtype, buf, (long)sz,
"raw dump to file", FAULT_ON_ERROR);
if (fwrite(buf, 1, sz, pc->tmpfile2) != sz)
error(FATAL, "cannot write to: %s\n",
(char *)opt);
}
close_tmpfile2();
fprintf(fp, "%ld bytes copied from 0x%llx to %s\n",
count, addr, (char *)opt);
return;
}
BZERO(&mem, sizeof(struct memloc));
hx = lost = linelen = typesz = per_line = ascii_start = 0;
location = NULL;
switch (flag & (DISPLAY_TYPES))
{
case DISPLAY_64:
ascii_start = ASCII_START_64;
typesz = SIZEOF_64BIT;
location = &mem.u64;
sprintf(readtype, "64-bit %s", addrtype);
per_line = ENTRIES_64;
if (machine_type("IA64"))
mem.limit64 = kt->end;
break;
case DISPLAY_32:
ascii_start = ASCII_START_32;
typesz = SIZEOF_32BIT;
location = &mem.u32;
sprintf(readtype, "32-bit %s", addrtype);
per_line = ENTRIES_32;
break;
case DISPLAY_16:
ascii_start = ASCII_START_16;
typesz = SIZEOF_16BIT;
location = &mem.u16;
sprintf(readtype, "16-bit %s", addrtype);
per_line = ENTRIES_16;
break;
case DISPLAY_8:
ascii_start = ASCII_START_8;
typesz = SIZEOF_8BIT;
location = &mem.u8;
sprintf(readtype, "8-bit %s", addrtype);
per_line = ENTRIES_8;
break;
case DISPLAY_ASCII:
typesz = SIZEOF_8BIT;
location = &mem.u8;
sprintf(readtype, "ascii");
per_line = 60;
displayed = 0;
break;
}
if (flag & NO_ERROR)
error_handle = RETURN_ON_ERROR|QUIET;
else
error_handle = FAULT_ON_ERROR;
for (i = a = 0; i < count; i++) {
if(!readmem(addr, memtype, location, typesz,
readtype, error_handle)) {
addr += typesz;
lost += 1;
continue;
}
if (!(flag & DISPLAY_ASCII) && (((i - lost) % per_line) == 0)) {
if ((i - lost)) {
if (flag & ASCII_ENDLINE) {
fprintf(fp, " %s", hexchars);
}
fprintf(fp, "\n");
}
fprintf(fp, "%s: ",
mkstring(buf, VADDR_PRLEN, RJUST|LONGLONG_HEX,
MKSTR(&addr)));
hx = 0;
BZERO(hexchars, MAX_HEXCHARS_PER_LINE+1);
linelen = VADDR_PRLEN + strlen(": ");
}
switch (flag & DISPLAY_TYPES)
{
case DISPLAY_64:
if ((flag & (HEXADECIMAL|SYMBOLIC|DISPLAY_DEFAULT)) ==
(HEXADECIMAL|SYMBOLIC|DISPLAY_DEFAULT)) {
if ((!mem.limit64 || (mem.u64 <= mem.limit64)) &&
in_ksymbol_range(mem.u64) &&
strlen(value_to_symstr(mem.u64, buf, 0))) {
fprintf(fp, "%-16s ", buf);
linelen += strlen(buf)+1;
break;
}
if ((flag & SLAB_CACHE) &&
vaddr_to_kmem_cache(mem.u64, slab,
!VERBOSE)) {
if ((flag & SLAB_CACHE2) || CRASHDEBUG(1))
sprintf(buf, "[%llx:%s]",
(ulonglong)mem.u64,
slab);
else
sprintf(buf, "[%s]", slab);
fprintf(fp, "%-16s ", buf);
linelen += strlen(buf)+1;
break;
}
}
if (flag & HEXADECIMAL) {
fprintf(fp, hex_64_fmt, LONG_LONG_PRLEN,
mem.u64);
linelen += (LONG_LONG_PRLEN + 1);
}
else if (flag & DECIMAL)
fprintf(fp, dec_64_fmt, mem.u64);
else if (flag & UDECIMAL)
fprintf(fp, dec_u64_fmt, mem.u64);
break;
case DISPLAY_32:
if ((flag & (HEXADECIMAL|SYMBOLIC|DISPLAY_DEFAULT)) ==
(HEXADECIMAL|SYMBOLIC|DISPLAY_DEFAULT)) {
if (in_ksymbol_range(mem.u32) &&
strlen(value_to_symstr(mem.u32, buf, 0))) {
fprintf(fp, INT_PRLEN == 16 ?
"%-16s " : "%-8s ", buf);
linelen += strlen(buf)+1;
break;
}
if ((flag & SLAB_CACHE) &&
vaddr_to_kmem_cache(mem.u32, slab,
!VERBOSE)) {
if ((flag & SLAB_CACHE2) || CRASHDEBUG(1))
sprintf(buf, "[%x:%s]",
mem.u32, slab);
else
sprintf(buf, "[%s]", slab);
fprintf(fp, INT_PRLEN == 16 ?
"%-16s " : "%-8s ", buf);
linelen += strlen(buf)+1;
break;
}
}
if (flag & NET_ENDIAN)
mem.u32 = htonl(mem.u32);
if (flag & HEXADECIMAL) {
fprintf(fp, "%.*x ", INT_PRLEN, mem.u32 );
linelen += (INT_PRLEN + 1);
}
else if (flag & DECIMAL)
fprintf(fp, "%12d ", mem.u32 );
else if (flag & UDECIMAL)
fprintf(fp, "%12u ", mem.u32 );
break;
case DISPLAY_16:
if (flag & NET_ENDIAN)
mem.u16 = htons(mem.u16);
if (flag & HEXADECIMAL) {
fprintf(fp, "%.*x ", SHORT_PRLEN, mem.u16);
linelen += (SHORT_PRLEN + 1);
}
else if (flag & DECIMAL)
fprintf(fp, "%5d ", mem.u16);
else if (flag & UDECIMAL)
fprintf(fp, "%5u ", mem.u16);
break;
case DISPLAY_8:
if (flag & HEXADECIMAL) {
fprintf(fp, "%.*x ", CHAR_PRLEN, mem.u8);
linelen += (CHAR_PRLEN + 1);
}
else if (flag & DECIMAL)
fprintf(fp, "%3d ", mem.u8);
else if (flag & UDECIMAL)
fprintf(fp, "%3u ", mem.u8);
break;
case DISPLAY_ASCII:
if (isprint(mem.u8)) {
if ((a % per_line) == 0) {
if (displayed && i)
fprintf(fp, "\n");
fprintf(fp, "%s: ",
mkstring(buf, VADDR_PRLEN,
RJUST|LONGLONG_HEX,
MKSTR(&addr)));
}
fprintf(fp, "%c", mem.u8);
displayed++;
a++;
} else {
if (count == ASCII_UNLIMITED)
return;
a = 0;
}
break;
}
if (flag & HEXADECIMAL) {
char* ptr;
switch (flag & DISPLAY_TYPES)
{
case DISPLAY_64:
ptr = (char*)&mem.u64;
for (j = 0; j < SIZEOF_64BIT; j++) {
ch = ptr[j];
if ((ch >= 0x20) && (ch < 0x7f)) {
hexchars[hx++] = ch;
}
else {
hexchars[hx++] = '.';
}
}
break;
case DISPLAY_32:
ptr = (char*)&mem.u32;
for (j = 0; j < (SIZEOF_32BIT); j++) {
ch = ptr[j];
if ((ch >= 0x20) && (ch < 0x7f)) {
hexchars[hx++] = ch;
} else {
hexchars[hx++] = '.';
}
}
break;
case DISPLAY_16:
ptr = (char*)&mem.u16;
for (j = 0; j < SIZEOF_16BIT; j++) {
ch = ptr[j];
if ((ch >= 0x20) && (ch < 0x7f)) {
hexchars[hx++] = ch;
} else {
hexchars[hx++] = '.';
}
}
break;
case DISPLAY_8:
ptr = (char*)&mem.u8;
for (j = 0; j < SIZEOF_8BIT; j++) {
ch = ptr[j];
if ((ch >= 0x20) && (ch < 0x7f)) {
hexchars[hx++] = ch;
} else {
hexchars[hx++] = '.';
}
}
break;
}
}
addr += typesz;
}
if ((flag & ASCII_ENDLINE) && hx) {
pad_line(fp, ascii_start - linelen, ' ');
fprintf(fp, " %s", hexchars);
}
if (lost != count )
fprintf(fp,"\n");
}
/*
* cmd_wr() is the sister routine of cmd_rd(), used to modify the contents
* of memory. Like the "rd" command, the starting address may be entered
* either symbolically or by address. The default modification size
* is the size of a long data type. Write permission must exist on the
* /dev/mem. The flags are similar to those used by rd:
*
* -p address argument is a physical address.
* -u address argument is user virtual address (only if ambiguous).
* -k address argument is user virtual address (only if ambiguous).
* -8 write data in an 8-bit value.
* -16 write data in a 16-bit value.
* -32 write data in a 32-bit values (default on 32-bit machines).
* -64 write data in a 64-bit values (default on 64-bit machines).
*
* Only one value of a given datasize may be modified.
*/
void
cmd_wr(void)
{
int c;
ulonglong value;
int addr_entered, value_entered;
int memtype;
struct memloc mem;
ulong addr;
void *buf;
long size;
struct syment *sp;
if (DUMPFILE())
error(FATAL, "not allowed on dumpfiles\n");
memtype = 0;
buf = NULL;
addr = 0;
size = sizeof(void*);
addr_entered = value_entered = FALSE;
while ((c = getopt(argcnt, args, "fukp81:3:6:")) != EOF) {
switch(c)
{
case '8':
size = 1;
break;
case '1':
if (!STREQ(optarg, "6")) {
error(INFO,
"invalid option: %c%s\n", c, optarg);
argerrs++;
} else
size = 2;
break;
case '3':
if (!STREQ(optarg, "2")) {
error(INFO,
"invalid option: %c%s\n", c, optarg);
argerrs++;
} else
size = 4;
break;
case '6':
if (!STREQ(optarg, "4")) {
error(INFO,
"invalid option: %c%s\n", c, optarg);
argerrs++;
} else
size = 8;
break;
case 'p':
memtype &= ~(UVADDR|KVADDR|FILEADDR);
memtype = PHYSADDR;
break;
case 'u':
memtype &= ~(PHYSADDR|KVADDR|FILEADDR);
memtype = UVADDR;
break;
case 'k':
memtype &= ~(PHYSADDR|UVADDR|FILEADDR);
memtype = KVADDR;
break;
case 'f':
/*
* Unsupported, but can be forcibly implemented
* by removing the DUMPFILE() check above and
* recompiling.
*/
if (!pc->dumpfile)
error(FATAL,
"-f option requires a dumpfile\n");
memtype &= ~(PHYSADDR|UVADDR|KVADDR);
memtype = FILEADDR;
break;
default:
argerrs++;
break;
}
}
if (argerrs)
cmd_usage(pc->curcmd, SYNOPSIS);
if (args[optind]) {
if (*args[optind] == '(')
addr = evall(args[optind], FAULT_ON_ERROR, NULL);
else if (hexadecimal(args[optind], 0))
addr = htoll(args[optind], FAULT_ON_ERROR, NULL);
else if ((sp = symbol_search(args[optind])))
addr = sp->value;
else {
fprintf(fp, "symbol not found: %s\n", args[optind]);
fprintf(fp, "possible alternatives:\n");
if (!symbol_query(args[optind], " ", NULL))
fprintf(fp, " (none found)\n");
return;
}
addr_entered = TRUE;
if (args[++optind]) {
value = stol(args[optind], FAULT_ON_ERROR, NULL);
value_entered = TRUE;
switch (size)
{
case 1:
mem.u8 = (uint8_t)value;
buf = (void *)&mem.u8;
break;
case 2:
mem.u16 = (uint16_t)value;
buf = (void *)&mem.u16;
break;
case 4:
mem.u32 = (uint32_t)value;
buf = (void *)&mem.u32;
break;
case 8:
mem.u64 = (uint64_t)value;
buf = (void *)&mem.u64;
break;
}
}
}
if (!addr_entered || !value_entered)
cmd_usage(pc->curcmd, SYNOPSIS);
if (!memtype)
memtype = vaddr_type(addr, CURRENT_CONTEXT());
switch (memtype)
{
case UVADDR:
if (!IS_UVADDR(addr, CURRENT_CONTEXT())) {
error(INFO, "invalid user virtual address: %llx\n",
addr);
cmd_usage(pc->curcmd, SYNOPSIS);
}
break;
case KVADDR:
if (!IS_KVADDR(addr)) {
error(INFO, "invalid kernel virtual address: %llx\n",
addr);
cmd_usage(pc->curcmd, SYNOPSIS);
}
break;
case PHYSADDR:
break;
case FILEADDR:
break;
case AMBIGUOUS:
error(INFO,
"ambiguous address: %llx (requires -p, -u or -k)\n",
addr);
cmd_usage(pc->curcmd, SYNOPSIS);
}
writemem(addr, memtype, buf, size, "write memory", FAULT_ON_ERROR);
}
char *
format_stack_entry(struct bt_info *bt, char *retbuf, ulong value, ulong limit)
{
char buf[BUFSIZE];
char slab[BUFSIZE];
if (BITS32()) {
if ((bt->flags & BT_FULL_SYM_SLAB) && accessible(value)) {
if ((!limit || (value <= limit)) &&
in_ksymbol_range(value) &&
strlen(value_to_symstr(value, buf, 0)))
sprintf(retbuf, INT_PRLEN == 16 ?
"%-16s" : "%-8s", buf);
else if (vaddr_to_kmem_cache(value, slab, !VERBOSE)) {
if ((bt->flags & BT_FULL_SYM_SLAB2) || CRASHDEBUG(1))
sprintf(buf, "[%lx:%s]", value, slab);
else
sprintf(buf, "[%s]", slab);
sprintf(retbuf, INT_PRLEN == 16 ?
"%-16s" : "%-8s", buf);
} else
sprintf(retbuf, "%08lx", value);
} else
sprintf(retbuf, "%08lx", value);
} else {
if ((bt->flags & BT_FULL_SYM_SLAB) && accessible(value)) {
if ((!limit || (value <= limit)) &&
in_ksymbol_range(value) &&
strlen(value_to_symstr(value, buf, 0)))
sprintf(retbuf, "%-16s", buf);
else if (vaddr_to_kmem_cache(value, slab, !VERBOSE)) {
if ((bt->flags & BT_FULL_SYM_SLAB2) || CRASHDEBUG(1))
sprintf(buf, "[%lx:%s]", value, slab);
else
sprintf(buf, "[%s]", slab);
sprintf(retbuf, "%-16s", buf);
} else
sprintf(retbuf, "%016lx", value);
} else
sprintf(retbuf, "%016lx", value);
}
return retbuf;
}
/*
* For processors with "traditional" kernel/user address space distinction.
*/
int
generic_is_kvaddr(ulong addr)
{
return (addr >= (ulong)(machdep->kvbase));
}
/*
* NOTE: Perhaps even this generic version should tighten up requirements
* by calling uvtop()?
*/
int
generic_is_uvaddr(ulong addr, struct task_context *tc)
{
return (addr < (ulong)(machdep->kvbase));
}
/*
* Raw dump of a task's stack, forcing symbolic output.
*/
void
raw_stack_dump(ulong stackbase, ulong size)
{
display_memory(stackbase, size/sizeof(ulong),
HEXADECIMAL|DISPLAY_DEFAULT|SYMBOLIC, KVADDR, NULL);
}
/*
* Raw data dump, with the option of symbolic output.
*/
void
raw_data_dump(ulong addr, long count, int symbolic)
{
long wordcnt;
ulonglong address;
int memtype;
switch (sizeof(long))
{
case SIZEOF_32BIT:
wordcnt = count/SIZEOF_32BIT;
if (count % SIZEOF_32BIT)
wordcnt++;
break;
case SIZEOF_64BIT:
wordcnt = count/SIZEOF_64BIT;
if (count % SIZEOF_64BIT)
wordcnt++;
break;
default:
break;
}
if (pc->curcmd_flags & MEMTYPE_FILEADDR) {
address = pc->curcmd_private;
memtype = FILEADDR;
} else if (pc->curcmd_flags & MEMTYPE_UVADDR) {
address = (ulonglong)addr;
memtype = UVADDR;
} else {
address = (ulonglong)addr;
memtype = KVADDR;
}
display_memory(address, wordcnt,
HEXADECIMAL|DISPLAY_DEFAULT|(symbolic ? SYMBOLIC : ASCII_ENDLINE),
memtype, NULL);
}
/*
* Quietly checks the accessibility of a memory location.
*/
int
accessible(ulong kva)
{
ulong tmp;
return(readmem(kva, KVADDR, &tmp, sizeof(ulong),
"accessible check", RETURN_ON_ERROR|QUIET));
}
/*
* readmem() is by far *the* workhorse of this whole program. It reads
* memory from /dev/kmem, /dev/mem the dumpfile or /proc/kcore, whichever
* is appropriate:
*
* addr a user, kernel or physical memory address.
* memtype addr type: UVADDR, KVADDR, PHYSADDR, XENMACHADDR or FILEADDR
* buffer supplied buffer to read the data into.
* size number of bytes to read.
* type string describing the request -- helpful when the read fails.
* error_handle what to do if the read fails: FAULT_ON_ERROR kills the command
* immediately; RETURN_ON_ERROR returns FALSE; QUIET suppresses
* the error message.
*/
#define PRINT_ERROR_MESSAGE ((!(error_handle & QUIET) && !STREQ(pc->curcmd, "search")) || \
(CRASHDEBUG(1) && !STREQ(pc->curcmd, "search")) || CRASHDEBUG(2))
#define INVALID_UVADDR "invalid user virtual address: %llx type: \"%s\"\n"
#define INVALID_KVADDR "invalid kernel virtual address: %llx type: \"%s\"\n"
#define SEEK_ERRMSG "seek error: %s address: %llx type: \"%s\"\n"
#define READ_ERRMSG "read error: %s address: %llx type: \"%s\"\n"
#define WRITE_ERRMSG "write error: %s address: %llx type: \"%s\"\n"
#define PAGE_EXCLUDED_ERRMSG "page excluded: %s address: %llx type: \"%s\"\n"
#define RETURN_ON_PARTIAL_READ() \
if ((error_handle & RETURN_PARTIAL) && (size < orig_size)) { \
if (CRASHDEBUG(1)) \
error(INFO, "RETURN_PARTIAL: \"%s\" read: %ld of %ld\n",\
type, orig_size - size, orig_size); \
return TRUE; \
}
int
readmem(ulonglong addr, int memtype, void *buffer, long size,
char *type, ulong error_handle)
{
int fd;
long cnt, orig_size;
physaddr_t paddr;
ulonglong pseudo;
char *bufptr;
if (CRASHDEBUG(4))
fprintf(fp, "<readmem: %llx, %s, \"%s\", %ld, %s, %lx>\n",
addr, memtype_string(memtype, 1), type, size,
error_handle_string(error_handle), (ulong)buffer);
bufptr = (char *)buffer;
orig_size = size;
if (size <= 0) {
if (PRINT_ERROR_MESSAGE)
error(INFO, "invalid size request: %ld type: \"%s\"\n",
size, type);
goto readmem_error;
}
fd = REMOTE_MEMSRC() ? pc->sockfd : (ACTIVE() ? pc->mfd : pc->dfd);
/*
* Screen out any error conditions.
*/
switch (memtype)
{
case UVADDR:
if (!CURRENT_CONTEXT()) {
if (PRINT_ERROR_MESSAGE)
error(INFO, "no current user process\n");
goto readmem_error;
}
if (!IS_UVADDR(addr, CURRENT_CONTEXT())) {
if (PRINT_ERROR_MESSAGE)
error(INFO, INVALID_UVADDR, addr, type);
goto readmem_error;
}
break;
case KVADDR:
if (LKCD_DUMPFILE())
addr = fix_lkcd_address(addr);
if (!IS_KVADDR(addr)) {
if (PRINT_ERROR_MESSAGE)
error(INFO, INVALID_KVADDR, addr, type);
goto readmem_error;
}
break;
case PHYSADDR:
case XENMACHADDR:
break;
case FILEADDR:
return generic_read_dumpfile(addr, buffer, size, type, error_handle);
}
while (size > 0) {
switch (memtype)
{
case UVADDR:
if (!uvtop(CURRENT_CONTEXT(), addr, &paddr, 0)) {
if (PRINT_ERROR_MESSAGE)
error(INFO, INVALID_UVADDR, addr, type);
goto readmem_error;
}
break;
case KVADDR:
if (!kvtop(CURRENT_CONTEXT(), addr, &paddr, 0)) {
if (PRINT_ERROR_MESSAGE)
error(INFO, INVALID_KVADDR, addr, type);
goto readmem_error;
}
break;
case PHYSADDR:
paddr = addr;
break;
case XENMACHADDR:
pseudo = xen_m2p(addr);
if (pseudo == XEN_MACHADDR_NOT_FOUND) {
pc->curcmd_flags |= XEN_MACHINE_ADDR;
paddr = addr;
} else
paddr = pseudo | PAGEOFFSET(addr);
break;
}
/*
* Compute bytes till end of page.
*/
cnt = PAGESIZE() - PAGEOFFSET(paddr);
if (cnt > size)
cnt = size;
if (CRASHDEBUG(4))
fprintf(fp, "<%s: addr: %llx paddr: %llx cnt: %ld>\n",
readmem_function_name(), addr,
(unsigned long long)paddr, cnt);
if (memtype == KVADDR)
pc->curcmd_flags |= MEMTYPE_KVADDR;
else
pc->curcmd_flags &= ~MEMTYPE_KVADDR;
switch (READMEM(fd, bufptr, cnt,
(memtype == PHYSADDR) || (memtype == XENMACHADDR) ? 0 : addr, paddr))
{
case SEEK_ERROR:
if (PRINT_ERROR_MESSAGE)
error(INFO, SEEK_ERRMSG, memtype_string(memtype, 0), addr, type);
goto readmem_error;
case READ_ERROR:
if (PRINT_ERROR_MESSAGE)
error(INFO, READ_ERRMSG, memtype_string(memtype, 0), addr, type);
goto readmem_error;
case PAGE_EXCLUDED:
RETURN_ON_PARTIAL_READ();
if (PRINT_ERROR_MESSAGE)
error(INFO, PAGE_EXCLUDED_ERRMSG, memtype_string(memtype, 0), addr, type);
goto readmem_error;
default:
break;
}
addr += cnt;
bufptr += cnt;
size -= cnt;
}
return TRUE;
readmem_error:
switch (error_handle)
{
case (FAULT_ON_ERROR):
if ((pc->flags & DEVMEM) && (kt->flags & PRE_KERNEL_INIT) &&
devmem_is_restricted() && switch_to_proc_kcore())
return(readmem(addr, memtype, bufptr, size,
type, error_handle));
/* FALLTHROUGH */
case (QUIET|FAULT_ON_ERROR):
if (pc->flags & IN_FOREACH)
RESUME_FOREACH();
RESTART();
case (RETURN_ON_ERROR):
case (RETURN_PARTIAL|RETURN_ON_ERROR):
case (QUIET|RETURN_ON_ERROR):
break;
}
return FALSE;
}
/*
* Accept anything...
*/
int
generic_verify_paddr(physaddr_t paddr)
{
return TRUE;
}
/*
* Read from /dev/mem.
*/
int
read_dev_mem(int fd, void *bufptr, int cnt, ulong addr, physaddr_t paddr)
{
int readcnt;
if (!machdep->verify_paddr(paddr)) {
if (CRASHDEBUG(1) && !STREQ(pc->curcmd, "search"))
error(INFO, "verify_paddr(%lx) failed\n", paddr);
return READ_ERROR;
}
/*
* /dev/mem disallows anything >= __pa(high_memory)
*
* However it will allow 64-bit lseeks to anywhere, and when followed
* by pulling a 32-bit address from the 64-bit file position, it
* quietly returns faulty data from the (wrapped-around) address.
*/
if (vt->high_memory && (paddr >= (physaddr_t)(VTOP(vt->high_memory)))) {
readcnt = 0;
errno = 0;
goto try_dev_kmem;
}
if (lseek(fd, (off_t)paddr, SEEK_SET) == -1)
return SEEK_ERROR;
next_read:
errno = 0;
readcnt = read(fd, bufptr, cnt);
if ((readcnt != cnt) && CRASHDEBUG(4)) {
if (errno)
perror("/dev/mem");
error(INFO, "read(/dev/mem, %lx, %ld): %ld (%lx)\n",
paddr, cnt, readcnt, readcnt);
}
try_dev_kmem:
/*
* On 32-bit intel architectures high memory can can only be accessed
* via vmalloc'd addresses. However, /dev/mem returns 0 bytes, and
* non-reserved memory pages can't be mmap'd, so the only alternative
* is to read it from /dev/kmem.
*/
if ((readcnt != cnt) && BITS32() && !readcnt && !errno &&
IS_VMALLOC_ADDR(addr))
readcnt = read_dev_kmem(addr, bufptr, cnt);
/*
* The 2.6 valid_phys_addr_range() can potentially shorten the
* count of a legitimate read request. So far this has only been
* seen on an ia64 where a kernel page straddles an EFI segment.
*/
if ((readcnt != cnt) && readcnt && (machdep->flags & DEVMEMRD) &&
!errno) {
if (CRASHDEBUG(1) && !STREQ(pc->curcmd, "search"))
error(INFO, "read(/dev/mem, %lx, %ld): %ld (%lx)\n",
paddr, cnt, readcnt, readcnt);
cnt -= readcnt;
bufptr += readcnt;
goto next_read;
}
if (readcnt != cnt)
return READ_ERROR;
return readcnt;
}
/*
* Write to /dev/mem.
*/
int
write_dev_mem(int fd, void *bufptr, int cnt, ulong addr, physaddr_t paddr)
{
if (!machdep->verify_paddr(paddr)) {
if (CRASHDEBUG(1))
error(INFO, "verify_paddr(%lx) failed\n", paddr);
return WRITE_ERROR;
}
if (lseek(fd, (off_t)paddr, SEEK_SET) == -1)
return SEEK_ERROR;
if (write(fd, bufptr, cnt) != cnt)
return WRITE_ERROR;
return cnt;
}
/*
* The first required reads of memory are done in kernel_init(),
* so if there's a fatal read error of /dev/mem, display a warning
* message if it appears that CONFIG_STRICT_DEVMEM is in effect.
* On x86 and x86_64, only the first 256 pages of physical memory
* are accessible:
*
* #ifdef CONFIG_STRICT_DEVMEM
* int devmem_is_allowed(unsigned long pagenr)
* {
* if (pagenr <= 256)
* return 1;
* if (!page_is_ram(pagenr))
* return 1;
* return 0;
* }
* #endif
*
* It would probably suffice to simply check for the existence of
* devmem_is_allowed(), but on x86 and x86_64 verify pfn 256 reads OK,
* and 257 fails.
*
* Update: a patch has been posted to LKML to fix the off-by-one error
* by changing "<= 256" to "< 256":
*
* https://lkml.org/lkml/2012/8/28/357
*
* The X86/X86_64 lower-boundary pfn check below has been changed
* (preemptively) from 256 to 255.
*
* In any case, if that x86/x86_64 check fails to prove CONFIG_STRICT_DEVMEM
* is configured, then the function will check that "jiffies" can be read,
* as is done for the other architectures.
*
*/
static int
devmem_is_restricted(void)
{
long tmp;
int restricted;
/*
* Check for pre-CONFIG_STRICT_DEVMEM kernels.
*/
if (!kernel_symbol_exists("devmem_is_allowed")) {
if (machine_type("ARM") || machine_type("ARM64") ||
machine_type("X86") || machine_type("X86_64") ||
machine_type("PPC") || machine_type("PPC64"))
return FALSE;
}
restricted = FALSE;
if (STREQ(pc->live_memsrc, "/dev/mem")) {
if (machine_type("X86") || machine_type("X86_64")) {
if (readmem(255*PAGESIZE(), PHYSADDR, &tmp,
sizeof(long), "devmem_is_allowed - pfn 255",
QUIET|RETURN_ON_ERROR) &&
!(readmem(257*PAGESIZE(), PHYSADDR, &tmp,
sizeof(long), "devmem_is_allowed - pfn 257",
QUIET|RETURN_ON_ERROR)))
restricted = TRUE;
}
if (kernel_symbol_exists("jiffies") &&
!readmem(symbol_value("jiffies"), KVADDR, &tmp,
sizeof(ulong), "devmem_is_allowed - jiffies",
QUIET|RETURN_ON_ERROR))
restricted = TRUE;
if (restricted)
error(INFO,
"\nthis kernel may be configured with CONFIG_STRICT_DEVMEM,"
" which\n renders /dev/mem unusable as a live memory "
"source.\n\n");
}
return restricted;
}
static int
switch_to_proc_kcore(void)
{
close(pc->mfd);
if (file_exists("/proc/kcore", NULL))
error(INFO, "trying /proc/kcore as an alternative to /dev/mem\n\n");
else
return FALSE;
if ((pc->mfd = open("/proc/kcore", O_RDONLY)) < 0) {
error(INFO, "/proc/kcore: %s\n", strerror(errno));
return FALSE;
}
if (!proc_kcore_init(fp)) {
error(INFO, "/proc/kcore: initialization failed\n");
return FALSE;
}
pc->flags &= ~DEVMEM;
pc->flags |= PROC_KCORE;
pc->readmem = read_proc_kcore;
pc->writemem = write_proc_kcore;
pc->live_memsrc = "/proc/kcore";
return TRUE;
}
/*
* Read from memory driver.
*/
int
read_memory_device(int fd, void *bufptr, int cnt, ulong addr, physaddr_t paddr)
{
if (pc->curcmd_flags & XEN_MACHINE_ADDR)
return READ_ERROR;
if (!machdep->verify_paddr(paddr)) {
if (CRASHDEBUG(1))
error(INFO, "verify_paddr(%lx) failed\n", paddr);
return READ_ERROR;
}
lseek(fd, (loff_t)paddr, SEEK_SET);
if (read(fd, bufptr, cnt) != cnt)
return READ_ERROR;
return cnt;
}
/*
* Write to memory driver.
*/
int
write_memory_device(int fd, void *bufptr, int cnt, ulong addr, physaddr_t paddr)
{
if (!(MEMORY_DRIVER_DEVICE_MODE & S_IWUSR))
return (error(FATAL, "cannot write to %s!\n", pc->live_memsrc));
if (lseek(fd, (loff_t)paddr, SEEK_SET) == -1)
return SEEK_ERROR;
if (write(fd, bufptr, cnt) != cnt)
return WRITE_ERROR;
return cnt;
}
/*
* Read from an MCLX formatted dumpfile.
*/
int
read_mclx_dumpfile(int fd, void *bufptr, int cnt, ulong addr, physaddr_t paddr)
{
if (vas_lseek((ulong)paddr, SEEK_SET))
return SEEK_ERROR;
if (vas_read((void *)bufptr, cnt) != cnt)
return READ_ERROR;
return cnt;
}
/*
* Write to an MCLX formatted dumpfile. This only modifies the buffered
* copy only; if it gets flushed, the modification is lost.
*/
int
write_mclx_dumpfile(int fd, void *bufptr, int cnt, ulong addr, physaddr_t paddr)
{
if (vas_lseek((ulong)paddr, SEEK_SET))
return SEEK_ERROR;
if (vas_write((void *)bufptr, cnt) != cnt)
return WRITE_ERROR;
return cnt;
}
/*
* Read from an LKCD formatted dumpfile.
*/
int
read_lkcd_dumpfile(int fd, void *bufptr, int cnt, ulong addr, physaddr_t paddr)
{
set_lkcd_fp(fp);
if (!lkcd_lseek(paddr))
return SEEK_ERROR;
if (lkcd_read((void *)bufptr, cnt) != cnt)
return READ_ERROR;
return cnt;
}
/*
* Write to an LKCD formatted dumpfile. (dummy routine -- not allowed)
*/
int
write_lkcd_dumpfile(int fd, void *bufptr, int cnt, ulong addr, physaddr_t paddr)
{
return (error(FATAL, "cannot write to an LKCD compressed dump!\n"));
}
/*
* Read from network daemon.
*/
int
read_daemon(int fd, void *bufptr, int cnt, ulong vaddr, physaddr_t paddr)
{
if (remote_memory_read(pc->rmfd, bufptr, cnt, paddr, -1) == cnt)
return cnt;
if (!IS_VMALLOC_ADDR(vaddr) || DUMPFILE())
return READ_ERROR;
/*
* On 32-bit architectures w/memory above ~936MB,
* that memory can only be accessed via vmalloc'd
* addresses. However, /dev/mem returns 0 bytes,
* and non-reserved memory pages can't be mmap'd, so
* the only alternative is to read it from /dev/kmem.
*/
if (BITS32() && remote_memory_read(pc->rkfd, bufptr, cnt, vaddr, -1) == cnt)
return cnt;
return READ_ERROR;
}
/*
* Write to network daemon.
*/
int
write_daemon(int fd, void *bufptr, int cnt, ulong addr, physaddr_t paddr)
{
return (error(FATAL, "writing to daemon not supported yet [TBD]\n"));
}
/*
* Turn the memtype bitmask into a string.
*/
static
char *memtype_string(int memtype, int debug)
{
static char membuf[40];
switch (memtype)
{
case UVADDR:
sprintf(membuf, debug ? "UVADDR" : "user virtual");
break;
case KVADDR:
sprintf(membuf, debug ? "KVADDR" : "kernel virtual");
break;
case PHYSADDR:
sprintf(membuf, debug ? "PHYSADDR" : "physical");
break;
case XENMACHADDR:
sprintf(membuf, debug ? "XENMACHADDR" : "xen machine");
break;
case FILEADDR:
sprintf(membuf, debug ? "FILEADDR" : "dumpfile");
break;
default:
if (debug)
sprintf(membuf, "0x%x (?)", memtype);
else
sprintf(membuf, "unknown");
break;
}
return membuf;
}
/*
* Turn the error_handle bitmask into a string,
* Note: FAULT_ON_ERROR == 0
*/
static
char *error_handle_string(ulong error_handle)
{
static char ebuf[20];
int others;
sprintf(ebuf, "(");
others = 0;
if (error_handle & RETURN_ON_ERROR)
sprintf(&ebuf[strlen(ebuf)], "%sROE", others++ ? "|" : "");
if (error_handle & FAULT_ON_ERROR)
sprintf(&ebuf[strlen(ebuf)], "%sFOE", others++ ? "|" : "");
if (error_handle & QUIET)
sprintf(&ebuf[strlen(ebuf)], "%sQ", others++ ? "|" : "");
if (error_handle & HEX_BIAS)
sprintf(&ebuf[strlen(ebuf)], "%sHB", others++ ? "|" : "");
if (error_handle & RETURN_PARTIAL)
sprintf(&ebuf[strlen(ebuf)], "%sRP", others++ ? "|" : "");
strcat(ebuf, ")");
return ebuf;
}
/*
* Sister routine to readmem().
*/
int
writemem(ulonglong addr, int memtype, void *buffer, long size,
char *type, ulong error_handle)
{
int fd;
long cnt;
physaddr_t paddr;
char *bufptr;
if (CRASHDEBUG(1))
fprintf(fp, "writemem: %llx, %s, \"%s\", %ld, %s %lx\n",
addr, memtype_string(memtype, 1), type, size,
error_handle_string(error_handle), (ulong)buffer);
if (size < 0) {
if (PRINT_ERROR_MESSAGE)
error(INFO, "invalid size request: %ld\n", size);
goto writemem_error;
}
bufptr = (char *)buffer;
fd = ACTIVE() ? pc->mfd : pc->dfd;
/*
* Screen out any error conditions.
*/
switch (memtype)
{
case UVADDR:
if (!CURRENT_CONTEXT()) {
if (PRINT_ERROR_MESSAGE)
error(INFO, "no current user process\n");
goto writemem_error;
}
if (!IS_UVADDR(addr, CURRENT_CONTEXT())) {
if (PRINT_ERROR_MESSAGE)
error(INFO, INVALID_UVADDR, addr, type);
goto writemem_error;
}
break;
case KVADDR:
if (!IS_KVADDR(addr)) {
if (PRINT_ERROR_MESSAGE)
error(INFO, INVALID_KVADDR, addr, type);
goto writemem_error;
}
break;
case PHYSADDR:
break;
case FILEADDR:
return generic_write_dumpfile(addr, buffer, size, type, error_handle);
}
while (size > 0) {
switch (memtype)
{
case UVADDR:
if (!uvtop(CURRENT_CONTEXT(), addr, &paddr, 0)) {
if (PRINT_ERROR_MESSAGE)
error(INFO, INVALID_UVADDR, addr, type);
goto writemem_error;
}
break;
case KVADDR:
if (!kvtop(CURRENT_CONTEXT(), addr, &paddr, 0)) {
if (PRINT_ERROR_MESSAGE)
error(INFO, INVALID_KVADDR, addr, type);
goto writemem_error;
}
break;
case PHYSADDR:
paddr = addr;
break;
}
/*
* Compute bytes till end of page.
*/
cnt = PAGESIZE() - PAGEOFFSET(paddr);
if (cnt > size)
cnt = size;
switch (pc->writemem(fd, bufptr, cnt, addr, paddr))
{
case SEEK_ERROR:
if (PRINT_ERROR_MESSAGE)
error(INFO, SEEK_ERRMSG, memtype_string(memtype, 0), addr, type);
goto writemem_error;
case WRITE_ERROR:
if (PRINT_ERROR_MESSAGE)
error(INFO, WRITE_ERRMSG, memtype_string(memtype, 0), addr, type);
goto writemem_error;
default:
break;
}
addr += cnt;
bufptr += cnt;
size -= cnt;
}
return TRUE;
writemem_error:
switch (error_handle)
{
case (FAULT_ON_ERROR):
case (QUIET|FAULT_ON_ERROR):
RESTART();
case (RETURN_ON_ERROR):
case (QUIET|RETURN_ON_ERROR):
break;
}
return FALSE;
}
/*
* When /dev/mem won't allow access, try /dev/kmem.
*/
static ssize_t
read_dev_kmem(ulong vaddr, char *bufptr, long cnt)
{
ssize_t readcnt;
if (pc->kfd < 0) {
if ((pc->kfd = open("/dev/kmem", O_RDONLY)) < 0)
return 0;
}
if (lseek(pc->kfd, vaddr, SEEK_SET) == -1)
return 0;
readcnt = read(pc->kfd, bufptr, cnt);
if (readcnt != cnt)
readcnt = 0;
return readcnt;
}
/*
* Generic dumpfile read/write functions to handle FILEADDR
* memtype arguments to readmem() and writemem(). These are
* not to be confused with pc->readmem/writemem plug-ins.
*/
static int
generic_read_dumpfile(ulonglong addr, void *buffer, long size, char *type,
ulong error_handle)
{
int fd;
int retval;
retval = TRUE;
if (!pc->dumpfile)
error(FATAL, "command requires a dumpfile\n");
if ((fd = open(pc->dumpfile, O_RDONLY)) < 0)
error(FATAL, "%s: %s\n", pc->dumpfile,
strerror(errno));
if (lseek(fd, addr, SEEK_SET) == -1) {
if (PRINT_ERROR_MESSAGE)
error(INFO, SEEK_ERRMSG,
memtype_string(FILEADDR, 0), addr, type);
retval = FALSE;
} else if (read(fd, buffer, size) != size) {
if (PRINT_ERROR_MESSAGE)
error(INFO, READ_ERRMSG,
memtype_string(FILEADDR, 0), addr, type);
retval = FALSE;
}
close(fd);
return retval;
}
static int
generic_write_dumpfile(ulonglong addr, void *buffer, long size, char *type,
ulong error_handle)
{
int fd;
int retval;
retval = TRUE;
if (!pc->dumpfile)
error(FATAL, "command requires a dumpfile\n");
if ((fd = open(pc->dumpfile, O_WRONLY)) < 0)
error(FATAL, "%s: %s\n", pc->dumpfile,
strerror(errno));
if (lseek(fd, addr, SEEK_SET) == -1) {
if (PRINT_ERROR_MESSAGE)
error(INFO, SEEK_ERRMSG,
memtype_string(FILEADDR, 0), addr, type);
retval = FALSE;
} else if (write(fd, buffer, size) != size) {
if (PRINT_ERROR_MESSAGE)
error(INFO, WRITE_ERRMSG,
memtype_string(FILEADDR, 0), addr, type);
retval = FALSE;
}
close(fd);
return retval;
}
/*
* Translates a kernel virtual address to its physical address. cmd_vtop()
* sets the verbose flag so that the pte translation gets displayed; all
* other callers quietly accept the translation.
*/
int
kvtop(struct task_context *tc, ulong kvaddr, physaddr_t *paddr, int verbose)
{
physaddr_t unused;
return (machdep->kvtop(tc ? tc : CURRENT_CONTEXT(), kvaddr,
paddr ? paddr : &unused, verbose));
}
/*
* Translates a user virtual address to its physical address. cmd_vtop()
* sets the verbose flag so that the pte translation gets displayed; all
* other callers quietly accept the translation.
*
* This routine can also take mapped kernel virtual addresses if the -u flag
* was passed to cmd_vtop(). If so, it makes the translation using the
* kernel-memory PGD entry instead of swapper_pg_dir.
*/
int
uvtop(struct task_context *tc, ulong vaddr, physaddr_t *paddr, int verbose)
{
return(machdep->uvtop(tc, vaddr, paddr, verbose));
}
/*
* The vtop command does a verbose translation of a user or kernel virtual
* address into it physical address. The pte translation is shown by
* passing the VERBOSE flag to kvtop() or uvtop(). If it's a user virtual
* address, the vm_area_struct data containing the page is displayed.
* Lastly, the mem_map[] page data containing the address is displayed.
*/
void
cmd_vtop(void)
{
int c;
ulong vaddr, context;
int others;
ulong vtop_flags, loop_vtop_flags;
struct task_context *tc;
vtop_flags = loop_vtop_flags = 0;
tc = NULL;
while ((c = getopt(argcnt, args, "ukc:")) != EOF) {
switch(c)
{
case 'c':
switch (str_to_context(optarg, &context, &tc))
{
case STR_PID:
case STR_TASK:
vtop_flags |= USE_USER_PGD;
break;
case STR_INVALID:
error(FATAL, "invalid task or pid value: %s\n",
optarg);
break;
}
break;
case 'u':
vtop_flags |= UVADDR;
break;
case 'k':
vtop_flags |= KVADDR;
break;
default:
argerrs++;
break;
}
}
if (argerrs || !args[optind])
cmd_usage(pc->curcmd, SYNOPSIS);
if (!tc && !(tc = CURRENT_CONTEXT()))
error(FATAL, "no current user process\n");
if ((vtop_flags & (UVADDR|KVADDR)) == (UVADDR|KVADDR))
error(FATAL, "-u and -k options are mutually exclusive\n");
others = 0;
while (args[optind]) {
vaddr = htol(args[optind], FAULT_ON_ERROR, NULL);
if (!(vtop_flags & (UVADDR|KVADDR))) {
switch (vaddr_type(vaddr, tc))
{
case UVADDR:
loop_vtop_flags = UVADDR;
break;
case KVADDR:
loop_vtop_flags = KVADDR;
break;
case AMBIGUOUS:
error(FATAL,
"ambiguous address: %lx (requires -u or -k)\n",
vaddr);
break;
}
} else
loop_vtop_flags = 0;
if (others++)
fprintf(fp, "\n");
do_vtop(vaddr, tc, vtop_flags | loop_vtop_flags);
if (REMOTE() && CRASHDEBUG(1)) {
ulong paddr = remote_vtop(tc->processor, vaddr);
if (paddr)
fprintf(fp, "rvtop(%lx)=%lx\n", vaddr, paddr);
}
optind++;
}
}
/*
* Do the work for cmd_vtop(), or less likely, foreach().
*/
void
do_vtop(ulong vaddr, struct task_context *tc, ulong vtop_flags)
{
physaddr_t paddr;
ulong vma, page;
int page_exists;
struct meminfo meminfo;
char buf1[BUFSIZE];
char buf2[BUFSIZE];
int memtype = 0;
switch (vtop_flags & (UVADDR|KVADDR))
{
case UVADDR:
memtype = UVADDR;
break;
case KVADDR:
memtype = KVADDR;
break;
case (UVADDR|KVADDR):
error(FATAL, "-u and -k options are mutually exclusive\n");
break;
default:
switch (vaddr_type(vaddr, tc))
{
case UVADDR:
memtype = UVADDR;
break;
case KVADDR:
memtype = KVADDR;
break;
case AMBIGUOUS:
error(FATAL,
"ambiguous address: %lx (requires -u or -k)\n",
vaddr);
break;
}
break;
}
page_exists = paddr = 0;
switch (memtype) {
case UVADDR:
fprintf(fp, "%s %s\n",
mkstring(buf1, UVADDR_PRLEN, LJUST, "VIRTUAL"),
mkstring(buf2, VADDR_PRLEN, LJUST, "PHYSICAL"));
if (!IN_TASK_VMA(tc->task, vaddr)) {
fprintf(fp, "%s (not accessible)\n\n",
mkstring(buf1, UVADDR_PRLEN, LJUST|LONG_HEX,
MKSTR(vaddr)));
return;
}
if (!uvtop(tc, vaddr, &paddr, 0)) {
fprintf(fp, "%s %s\n\n",
mkstring(buf1, UVADDR_PRLEN, LJUST|LONG_HEX,
MKSTR(vaddr)),
(XEN() && (paddr == PADDR_NOT_AVAILABLE)) ?
"(page not available)" : "(not mapped)");
page_exists = FALSE;
} else {
fprintf(fp, "%s %s\n\n",
mkstring(buf1, UVADDR_PRLEN, LJUST|LONG_HEX,
MKSTR(vaddr)),
mkstring(buf2, VADDR_PRLEN, LJUST|LONGLONG_HEX,
MKSTR(&paddr)));
page_exists = TRUE;
}
uvtop(tc, vaddr, &paddr, VERBOSE);
fprintf(fp, "\n");
vma = vm_area_dump(tc->task, UVADDR, vaddr, 0);
if (!page_exists) {
if (swap_location(paddr, buf1))
fprintf(fp, "\nSWAP: %s\n", buf1);
else if (vma_file_offset(vma, vaddr, buf1))
fprintf(fp, "\nFILE: %s\n", buf1);
}
break;
case KVADDR:
fprintf(fp, "%s %s\n",
mkstring(buf1, VADDR_PRLEN, LJUST, "VIRTUAL"),
mkstring(buf2, VADDR_PRLEN, LJUST, "PHYSICAL"));
if (!IS_KVADDR(vaddr)) {
fprintf(fp, "%-8lx (not a kernel virtual address)\n\n",
vaddr);
return;
}
if (vtop_flags & USE_USER_PGD) {
if (!uvtop(tc, vaddr, &paddr, 0)) {
fprintf(fp, "%s %s\n\n",
mkstring(buf1, UVADDR_PRLEN,
LJUST|LONG_HEX, MKSTR(vaddr)),
(XEN() &&
(paddr == PADDR_NOT_AVAILABLE)) ?
"(page not available)" :
"(not mapped)");
page_exists = FALSE;
} else {
fprintf(fp, "%s %s\n\n",
mkstring(buf1, UVADDR_PRLEN,
LJUST|LONG_HEX, MKSTR(vaddr)),
mkstring(buf2, VADDR_PRLEN,
LJUST|LONGLONG_HEX, MKSTR(&paddr)));
page_exists = TRUE;
}
uvtop(tc, vaddr, &paddr, VERBOSE);
} else {
if (!kvtop(tc, vaddr, &paddr, 0)) {
fprintf(fp, "%s %s\n\n",
mkstring(buf1, VADDR_PRLEN,
LJUST|LONG_HEX, MKSTR(vaddr)),
(XEN() &&
(paddr == PADDR_NOT_AVAILABLE)) ?
"(page not available)" :
"(not mapped)");
page_exists = FALSE;
} else {
fprintf(fp, "%s %s\n\n",
mkstring(buf1, VADDR_PRLEN,
LJUST|LONG_HEX, MKSTR(vaddr)),
mkstring(buf2, VADDR_PRLEN,
LJUST|LONGLONG_HEX, MKSTR(&paddr)));
page_exists = TRUE;
}
kvtop(tc, vaddr, &paddr, VERBOSE);
}
break;
}
fprintf(fp, "\n");
if (page_exists && phys_to_page(paddr, &page)) {
if ((pc->flags & DEVMEM) && (paddr >= VTOP(vt->high_memory)))
return;
BZERO(&meminfo, sizeof(struct meminfo));
meminfo.flags = ADDRESS_SPECIFIED;
meminfo.spec_addr = paddr;
meminfo.memtype = PHYSADDR;
dump_mem_map(&meminfo);
}
}
/*
* Runs PTOV() on the physical address argument or translates
* a per-cpu offset and cpu specifier.
*/
void
cmd_ptov(void)
{
int c, len, unknown;
ulong vaddr;
physaddr_t paddr, paddr_test;
char buf1[BUFSIZE];
char buf2[BUFSIZE];
int others;
char *cpuspec;
ulong *cpus;
while ((c = getopt(argcnt, args, "")) != EOF) {
switch(c)
{
default:
argerrs++;
break;
}
}
if (argerrs || !args[optind])
cmd_usage(pc->curcmd, SYNOPSIS);
others = 0;
cpuspec = NULL;
cpus = NULL;
while (args[optind]) {
cpuspec = strchr(args[optind], ':');
if (cpuspec) {
*cpuspec++ = NULLCHAR;
cpus = get_cpumask_buf();
if (STREQ(cpuspec, ""))
SET_BIT(cpus, CURRENT_CONTEXT()->processor);
else
make_cpumask(cpuspec, cpus, FAULT_ON_ERROR, NULL);
}
paddr = htoll(args[optind], FAULT_ON_ERROR, NULL);
if (cpuspec) {
sprintf(buf1, "[%d]", kt->cpus-1);
len = strlen(buf1) + 2;
fprintf(fp, "%sPER-CPU OFFSET: %llx\n",
others++ ? "\n" : "", (ulonglong)paddr);
fprintf(fp, " %s %s\n",
mkstring(buf1, len, LJUST, "CPU"),
mkstring(buf2, VADDR_PRLEN, LJUST, "VIRTUAL"));
for (c = 0; c < kt->cpus; c++) {
if (!NUM_IN_BITMAP(cpus, c))
continue;
vaddr = paddr + kt->__per_cpu_offset[c];
sprintf(buf1, "[%d]", c);
fprintf(fp, " %s%lx\n",
mkstring(buf2, len, LJUST, buf1),
vaddr);
}
FREEBUF(cpus);
} else {
vaddr = PTOV(paddr);
unknown = BITS32() && (!kvtop(0, vaddr, &paddr_test, 0) ||
(paddr_test != paddr));
fprintf(fp, "%s%s %s\n", others++ ? "\n" : "",
mkstring(buf1, VADDR_PRLEN, LJUST, "VIRTUAL"),
mkstring(buf2, VADDR_PRLEN, LJUST, "PHYSICAL"));
fprintf(fp, "%s %s\n", unknown ?
mkstring(buf1, VADDR_PRLEN, LJUST, "unknown") :
mkstring(buf1, VADDR_PRLEN, LJUST|LONG_HEX, MKSTR(vaddr)),
mkstring(buf2, VADDR_PRLEN, LJUST|LONGLONG_HEX,
MKSTR(&paddr)));
}
optind++;
}
}
/*
* Runs PTOB() on the page frame number to get the page address.
*/
void
cmd_ptob(void)
{
ulonglong value;
optind = 1;
if (!args[optind])
cmd_usage(pc->curcmd, SYNOPSIS);
while (args[optind]) {
value = stoll(args[optind], FAULT_ON_ERROR, NULL);
fprintf(fp, "%llx: %llx\n", value, PTOB(value));
optind++;
}
}
/*
* Runs BTOP() on the address to get the page frame number.
*/
void
cmd_btop(void)
{
ulonglong value;
optind = 1;
if (!args[optind])
cmd_usage(pc->curcmd, SYNOPSIS);
while (args[optind]) {
value = htoll(args[optind], FAULT_ON_ERROR, NULL);
fprintf(fp, "%llx: %llx\n", value, BTOP(value));
optind++;
}
}
/*
* This command displays basic virtual memory information of a context,
* consisting of a pointer to its mm_struct, its RSS and total virtual
* memory size; and a list of pointers to each vm_area_struct, its starting
* and ending address, and vm_flags value. The argument can be a task
* address or a PID number; if no args, the current context is used.
*/
void
cmd_vm(void)
{
int c;
ulong flag;
ulong value;
ulong single_vma;
ulonglong llvalue;
struct task_context *tc;
struct reference reference, *ref;
unsigned int radix;
int subsequent;
flag = 0;
single_vma = 0;
radix = 0;
ref = NULL;
BZERO(&reference, sizeof(struct reference));
while ((c = getopt(argcnt, args, "f:pmvR:P:xd")) != EOF) {
switch(c)
{
case 'f':
if (flag)
argerrs++;
else {
llvalue = htoll(optarg, FAULT_ON_ERROR, NULL);
do_vm_flags(llvalue);
return;
}
break;
case 'p':
if (flag)
argerrs++;
else
flag |= PHYSADDR;
break;
case 'm':
if (flag)
argerrs++;
else
flag |= PRINT_MM_STRUCT;
break;
case 'v':
if (flag)
argerrs++;
else
flag |= PRINT_VMA_STRUCTS;
break;
case 'R':
if (ref) {
error(INFO, "only one -R option allowed\n");
argerrs++;
} else if (flag && !(flag & PHYSADDR))
argerrs++;
else {
ref = &reference;
ref->str = optarg;
flag |= PHYSADDR;
}
break;
case 'P':
if (flag)
argerrs++;
else {
flag |= PRINT_SINGLE_VMA;
single_vma = htol(optarg, FAULT_ON_ERROR, NULL);
}
break;
case 'x':
if (radix == 10)
error(FATAL,
"-d and -x are mutually exclusive\n");
radix = 16;
break;
case 'd':
if (radix == 16)
error(FATAL,
"-d and -x are mutually exclusive\n");
radix = 10;
break;
default:
argerrs++;
break;
}
}
if (argerrs)
cmd_usage(pc->curcmd, SYNOPSIS);
if (radix == 10)
flag |= PRINT_RADIX_10;
else if (radix == 16)
flag |= PRINT_RADIX_16;
if (!args[optind]) {
if (!ref)
print_task_header(fp, CURRENT_CONTEXT(), 0);
vm_area_dump(CURRENT_TASK(), flag, single_vma, ref);
return;
}
subsequent = 0;
while (args[optind]) {
switch (str_to_context(args[optind], &value, &tc))
{
case STR_PID:
for (tc = pid_to_context(value); tc; tc = tc->tc_next) {
if (!ref)
print_task_header(fp, tc, subsequent++);
vm_area_dump(tc->task, flag, single_vma, ref);
}
break;
case STR_TASK:
if (!ref)
print_task_header(fp, tc, subsequent++);
vm_area_dump(tc->task, flag, single_vma, ref);
break;
case STR_INVALID:
error(INFO, "%sinvalid task or pid value: %s\n",
subsequent++ ? "\n" : "", args[optind]);
break;
}
optind++;
}
}
/*
* Translate a vm_flags value.
*/
#define VM_READ 0x00000001ULL /* currently active flags */
#define VM_WRITE 0x00000002ULL
#define VM_EXEC 0x00000004ULL
#define VM_SHARED 0x00000008ULL
#define VM_MAYREAD 0x00000010ULL /* limits for mprotect() etc */
#define VM_MAYWRITE 0x00000020ULL
#define VM_MAYEXEC 0x00000040ULL
#define VM_MAYSHARE 0x00000080ULL
#define VM_GROWSDOWN 0x00000100ULL /* general info on the segment */
#define VM_GROWSUP 0x00000200ULL
#define VM_NOHUGEPAGE 0x00000200ULL /* MADV_NOHUGEPAGE marked this vma */
#define VM_SHM 0x00000400ULL /* shared memory area, don't swap out */
#define VM_PFNMAP 0x00000400ULL
#define VM_DENYWRITE 0x00000800ULL /* ETXTBSY on write attempts.. */
#define VM_EXECUTABLE 0x00001000ULL
#define VM_LOCKED 0x00002000ULL
#define VM_IO 0x00004000ULL /* Memory mapped I/O or similar */
#define VM_SEQ_READ 0x00008000ULL /* App will access data sequentially */
#define VM_RAND_READ 0x00010000ULL /* App will not benefit from clustered reads */
#define VM_DONTCOPY 0x00020000ULL /* Do not copy this vma on fork */
#define VM_DONTEXPAND 0x00040000ULL /* Cannot expand with mremap() */
#define VM_RESERVED 0x00080000ULL /* Don't unmap it from swap_out */
#define VM_BIGPAGE 0x00100000ULL /* bigpage mappings, no pte's */
#define VM_BIGMAP 0x00200000ULL /* user wants bigpage mapping */
#define VM_WRITECOMBINED 0x00100000ULL /* Write-combined */
#define VM_NONCACHED 0x00200000ULL /* Noncached access */
#define VM_HUGETLB 0x00400000ULL /* Huge tlb Page*/
#define VM_ACCOUNT 0x00100000ULL /* Memory is a vm accounted object */
#define VM_NONLINEAR 0x00800000ULL /* Is non-linear (remap_file_pages) */
#define VM_MAPPED_COPY 0x01000000ULL /* T if mapped copy of data (nommu mmap) */
#define VM_HUGEPAGE 0x01000000ULL /* MADV_HUGEPAGE marked this vma */
#define VM_INSERTPAGE 0x02000000ULL /* The vma has had "vm_insert_page()" done on it */
#define VM_ALWAYSDUMP 0x04000000ULL /* Always include in core dumps */
#define VM_CAN_NONLINEAR 0x08000000ULL /* Has ->fault & does nonlinear pages */
#define VM_MIXEDMAP 0x10000000ULL /* Can contain "struct page" and pure PFN pages */
#define VM_SAO 0x20000000ULL /* Strong Access Ordering (powerpc) */
#define VM_PFN_AT_MMAP 0x40000000ULL /* PFNMAP vma that is fully mapped at mmap time */
#define VM_MERGEABLE 0x80000000ULL /* KSM may merge identical pages */
static void
do_vm_flags(ulonglong flags)
{
int others;
others = 0;
fprintf(fp, "%llx: (", flags);
if (flags & VM_READ) {
fprintf(fp, "READ");
others++;
}
if (flags & VM_WRITE)
fprintf(fp, "%sWRITE", others++ ? "|" : "");
if (flags & VM_EXEC)
fprintf(fp, "%sEXEC", others++ ? "|" : "");
if (flags & VM_SHARED)
fprintf(fp, "%sSHARED", others++ ? "|" : "");
if (flags & VM_MAYREAD)
fprintf(fp, "%sMAYREAD", others++ ? "|" : "");
if (flags & VM_MAYWRITE)
fprintf(fp, "%sMAYWRITE", others++ ? "|" : "");
if (flags & VM_MAYEXEC)
fprintf(fp, "%sMAYEXEC", others++ ? "|" : "");
if (flags & VM_MAYSHARE)
fprintf(fp, "%sMAYSHARE", others++ ? "|" : "");
if (flags & VM_GROWSDOWN)
fprintf(fp, "%sGROWSDOWN", others++ ? "|" : "");
if (kernel_symbol_exists("expand_upwards")) {
if (flags & VM_GROWSUP)
fprintf(fp, "%sGROWSUP", others++ ? "|" : "");
} else if (flags & VM_NOHUGEPAGE)
fprintf(fp, "%sNOHUGEPAGE", others++ ? "|" : "");
if (flags & VM_SHM) {
if (THIS_KERNEL_VERSION > LINUX(2,6,17))
fprintf(fp, "%sPFNMAP", others++ ? "|" : "");
else
fprintf(fp, "%sSHM", others++ ? "|" : "");
}
if (flags & VM_DENYWRITE)
fprintf(fp, "%sDENYWRITE", others++ ? "|" : "");
if (flags & VM_EXECUTABLE)
fprintf(fp, "%sEXECUTABLE", others++ ? "|" : "");
if (flags & VM_LOCKED)
fprintf(fp, "%sLOCKED", others++ ? "|" : "");
if (flags & VM_IO)
fprintf(fp, "%sIO", others++ ? "|" : "");
if (flags & VM_SEQ_READ)
fprintf(fp, "%sSEQ_READ", others++ ? "|" : "");
if (flags & VM_RAND_READ)
fprintf(fp, "%sRAND_READ", others++ ? "|" : "");
if (flags & VM_DONTCOPY)
fprintf(fp, "%sDONTCOPY", others++ ? "|" : "");
if (flags & VM_DONTEXPAND)
fprintf(fp, "%sDONTEXPAND", others++ ? "|" : "");
if (flags & VM_RESERVED)
fprintf(fp, "%sRESERVED", others++ ? "|" : "");
if (symbol_exists("nr_bigpages") && (THIS_KERNEL_VERSION == LINUX(2,4,9))) {
if (flags & VM_BIGPAGE)
fprintf(fp, "%sBIGPAGE", others++ ? "|" : "");
if (flags & VM_BIGMAP)
fprintf(fp, "%sBIGMAP", others++ ? "|" : "");
} else {
if ((THIS_KERNEL_VERSION < LINUX(2,4,21)) &&
(flags & VM_WRITECOMBINED))
fprintf(fp, "%sWRITECOMBINED", others++ ? "|" : "");
if ((THIS_KERNEL_VERSION < LINUX(2,4,21)) &&
(flags & VM_NONCACHED))
fprintf(fp, "%sNONCACHED", others++ ? "|" : "");
if (flags & VM_HUGETLB)
fprintf(fp, "%sHUGETLB", others++ ? "|" : "");
if (flags & VM_ACCOUNT)
fprintf(fp, "%sACCOUNT", others++ ? "|" : "");
}
if (flags & VM_NONLINEAR)
fprintf(fp, "%sNONLINEAR", others++ ? "|" : "");
if (flags & VM_HUGEPAGE) {
if (MEMBER_EXISTS("mm_struct", "pmd_huge_pte"))
fprintf(fp, "%sHUGEPAGE", others++ ? "|" : "");
else
fprintf(fp, "%sMAPPED_COPY", others++ ? "|" : "");
}
if (flags & VM_INSERTPAGE)
fprintf(fp, "%sINSERTPAGE", others++ ? "|" : "");
if (flags & VM_ALWAYSDUMP)
fprintf(fp, "%sALWAYSDUMP", others++ ? "|" : "");
if (flags & VM_CAN_NONLINEAR)
fprintf(fp, "%sCAN_NONLINEAR", others++ ? "|" : "");
if (flags & VM_MIXEDMAP)
fprintf(fp, "%sMIXEDMAP", others++ ? "|" : "");
if (flags & VM_SAO)
fprintf(fp, "%sSAO", others++ ? "|" : "");
if (flags & VM_PFN_AT_MMAP)
fprintf(fp, "%sPFN_AT_MMAP", others++ ? "|" : "");
if (flags & VM_MERGEABLE)
fprintf(fp, "%sMERGEABLE", others++ ? "|" : "");
fprintf(fp, ")\n");
}
/*
* Read whatever size vm_area_struct.vm_flags happens to be into a ulonglong.
*/
static ulonglong
get_vm_flags(char *vma_buf)
{
ulonglong vm_flags = 0;
if (SIZE(vm_area_struct_vm_flags) == sizeof(short))
vm_flags = USHORT(vma_buf + OFFSET(vm_area_struct_vm_flags));
else if (SIZE(vm_area_struct_vm_flags) == sizeof(long))
vm_flags = ULONG(vma_buf+ OFFSET(vm_area_struct_vm_flags));
else if (SIZE(vm_area_struct_vm_flags) == sizeof(long long))
vm_flags = ULONGLONG(vma_buf+ OFFSET(vm_area_struct_vm_flags));
else
error(INFO, "questionable vm_area_struct.vm_flags size: %d\n",
SIZE(vm_area_struct_vm_flags));
return vm_flags;
}
/*
* vm_area_dump() primarily does the work for cmd_vm(), but is also called
* from IN_TASK_VMA(), do_vtop(), and foreach(). How it behaves depends
* upon the flag and ref arguments:
*
* UVADDR do_vtop() when dumping the VMA for a uvaddr
* UVADDR|VERIFY_ADDR IN_TASK_VMA() macro checks if a uvaddr is in a VMA
* PHYSADDR cmd_vm() or foreach(vm) for -p and -R options
* PRINT_MM_STRUCT cmd_vm() or foreach(vm) for -m option
* PRINT_VMA_STRUCTS cmd_vm() or foreach(vm) for -v option
* PRINT_INODES open_files_dump() backdoors foreach(vm)
*
* ref cmd_vm() or foreach(vm) for -R option that searches
* for references -- and only then does a display
*/
#define PRINT_VM_DATA() \
{ \
fprintf(fp, "%s %s ", \
mkstring(buf4, VADDR_PRLEN, CENTER|LJUST, "MM"), \
mkstring(buf5, VADDR_PRLEN, CENTER|LJUST, "PGD")); \
fprintf(fp, "%s %s\n", \
mkstring(buf4, 6, CENTER|LJUST, "RSS"), \
mkstring(buf5, 8, CENTER|LJUST, "TOTAL_VM")); \
\
fprintf(fp, "%s %s ", \
mkstring(buf4, VADDR_PRLEN, CENTER|LJUST|LONG_HEX, \
MKSTR(tm->mm_struct_addr)), \
mkstring(buf5, VADDR_PRLEN, CENTER|LJUST|LONG_HEX, \
MKSTR(tm->pgd_addr))); \
\
sprintf(buf4, "%ldk", (tm->rss * PAGESIZE())/1024); \
sprintf(buf5, "%ldk", (tm->total_vm * PAGESIZE())/1024); \
fprintf(fp, "%s %s\n", \
mkstring(buf4, 6, CENTER|LJUST, NULL), \
mkstring(buf5, 8, CENTER|LJUST, NULL)); \
}
#define PRINT_VMA_DATA() \
fprintf(fp, "%s%s%s%s%s %6llx%s%s\n", \
mkstring(buf4, VADDR_PRLEN, CENTER|LJUST|LONG_HEX, MKSTR(vma)), \
space(MINSPACE), \
mkstring(buf2, UVADDR_PRLEN, RJUST|LONG_HEX, MKSTR(vm_start)), \
space(MINSPACE), \
mkstring(buf3, UVADDR_PRLEN, RJUST|LONG_HEX, MKSTR(vm_end)), \
vm_flags, space(MINSPACE), buf1);
#define FILENAME_COMPONENT(P,C) \
((STREQ((P), "/") && STREQ((C), "/")) || \
(!STREQ((C), "/") && strstr((P),(C))))
#define VM_REF_SEARCH (0x1)
#define VM_REF_DISPLAY (0x2)
#define VM_REF_NUMBER (0x4)
#define VM_REF_VMA (0x8)
#define VM_REF_PAGE (0x10)
#define VM_REF_HEADER (0x20)
#define DO_REF_SEARCH(X) ((X) && ((X)->cmdflags & VM_REF_SEARCH))
#define DO_REF_DISPLAY(X) ((X) && ((X)->cmdflags & VM_REF_DISPLAY))
#define VM_REF_CHECK_HEXVAL(X,V) \
(DO_REF_SEARCH(X) && ((X)->cmdflags & VM_REF_NUMBER) && ((X)->hexval == (V)))
#define VM_REF_CHECK_DECVAL(X,V) \
(DO_REF_SEARCH(X) && ((X)->cmdflags & VM_REF_NUMBER) && ((X)->decval == (V)))
#define VM_REF_CHECK_STRING(X,S) \
(DO_REF_SEARCH(X) && (string_exists(S)) && FILENAME_COMPONENT((S),(X)->str))
#define VM_REF_FOUND(X) ((X) && ((X)->cmdflags & VM_REF_HEADER))
ulong
vm_area_dump(ulong task, ulong flag, ulong vaddr, struct reference *ref)
{
struct task_context *tc;
ulong vma;
ulong vm_start;
ulong vm_end;
ulong vm_next, vm_mm;
char *dentry_buf, *vma_buf, *file_buf;
ulonglong vm_flags;
ulong vm_file, inode;
ulong dentry, vfsmnt;
ulong single_vma;
unsigned int radix;
int single_vma_found;
int found;
struct task_mem_usage task_mem_usage, *tm;
char buf1[BUFSIZE];
char buf2[BUFSIZE];
char buf3[BUFSIZE];
char buf4[BUFSIZE];
char buf5[BUFSIZE];
char vma_header[BUFSIZE];
tc = task_to_context(task);
tm = &task_mem_usage;
get_task_mem_usage(task, tm);
single_vma = 0;
single_vma_found = FALSE;
if (flag & PRINT_SINGLE_VMA) {
single_vma = vaddr;
vaddr = 0;
}
if (flag & PRINT_RADIX_10)
radix = 10;
else if (flag & PRINT_RADIX_16)
radix = 16;
else
radix = 0;
if (ref) {
ref->cmdflags = VM_REF_SEARCH;
if (IS_A_NUMBER(ref->str)) {
ref->hexval = htol(ref->str, FAULT_ON_ERROR, NULL);
if (decimal(ref->str, 0))
ref->decval = dtol(ref->str,
FAULT_ON_ERROR, NULL);
ref->cmdflags |= VM_REF_NUMBER;
}
}
if (VM_REF_CHECK_HEXVAL(ref, tm->mm_struct_addr) ||
VM_REF_CHECK_HEXVAL(ref, tm->pgd_addr)) {
print_task_header(fp, tc, 0);
PRINT_VM_DATA();
fprintf(fp, "\n");
return (ulong)NULL;
}
if (!(flag & (UVADDR|PRINT_MM_STRUCT|PRINT_VMA_STRUCTS|PRINT_SINGLE_VMA)) &&
!DO_REF_SEARCH(ref))
PRINT_VM_DATA();
if (!tm->mm_struct_addr)
return (ulong)NULL;
if (flag & PRINT_MM_STRUCT) {
dump_struct("mm_struct", tm->mm_struct_addr, radix);
return (ulong)NULL;
}
readmem(tm->mm_struct_addr + OFFSET(mm_struct_mmap), KVADDR,
&vma, sizeof(void *), "mm_struct mmap", FAULT_ON_ERROR);
sprintf(vma_header, "%s%s%s%s%s FLAGS%sFILE\n",
mkstring(buf1, VADDR_PRLEN, CENTER|LJUST, "VMA"),
space(MINSPACE),
mkstring(buf2, UVADDR_PRLEN, CENTER|RJUST, "START"),
space(MINSPACE),
mkstring(buf3, UVADDR_PRLEN, CENTER|RJUST, "END"),
space(MINSPACE));
if (!(flag & (PHYSADDR|VERIFY_ADDR|PRINT_VMA_STRUCTS|PRINT_SINGLE_VMA)) &&
!DO_REF_SEARCH(ref))
fprintf(fp, "%s", vma_header);
for (found = FALSE; vma; vma = vm_next) {
if ((flag & PHYSADDR) && !DO_REF_SEARCH(ref))
fprintf(fp, "%s", vma_header);
inode = 0;
BZERO(buf1, BUFSIZE);
vma_buf = fill_vma_cache(vma);
vm_mm = ULONG(vma_buf + OFFSET(vm_area_struct_vm_mm));
vm_end = ULONG(vma_buf + OFFSET(vm_area_struct_vm_end));
vm_next = ULONG(vma_buf + OFFSET(vm_area_struct_vm_next));
vm_start = ULONG(vma_buf + OFFSET(vm_area_struct_vm_start));
vm_flags = get_vm_flags(vma_buf);
vm_file = ULONG(vma_buf + OFFSET(vm_area_struct_vm_file));
if (flag & PRINT_SINGLE_VMA) {
if (vma != single_vma)
continue;
fprintf(fp, "%s", vma_header);
single_vma_found = TRUE;
}
if (flag & PRINT_VMA_STRUCTS) {
dump_struct("vm_area_struct", vma, radix);
continue;
}
if (vm_file && !(flag & VERIFY_ADDR)) {
file_buf = fill_file_cache(vm_file);
dentry = ULONG(file_buf + OFFSET(file_f_dentry));
dentry_buf = NULL;
if (dentry) {
dentry_buf = fill_dentry_cache(dentry);
if (VALID_MEMBER(file_f_vfsmnt)) {
vfsmnt = ULONG(file_buf +
OFFSET(file_f_vfsmnt));
get_pathname(dentry, buf1, BUFSIZE,
1, vfsmnt);
} else {
get_pathname(dentry, buf1, BUFSIZE,
1, 0);
}
}
if ((flag & PRINT_INODES) && dentry) {
inode = ULONG(dentry_buf +
OFFSET(dentry_d_inode));
}
}
if (!(flag & UVADDR) || ((flag & UVADDR) &&
((vaddr >= vm_start) && (vaddr < vm_end)))) {
found = TRUE;
if (flag & VERIFY_ADDR)
return vma;
if (DO_REF_SEARCH(ref)) {
if (VM_REF_CHECK_HEXVAL(ref, vma) ||
VM_REF_CHECK_HEXVAL(ref, (ulong)vm_flags) ||
VM_REF_CHECK_STRING(ref, buf1)) {
if (!(ref->cmdflags & VM_REF_HEADER)) {
print_task_header(fp, tc, 0);
PRINT_VM_DATA();
ref->cmdflags |= VM_REF_HEADER;
}
if (!(ref->cmdflags & VM_REF_VMA) ||
(ref->cmdflags & VM_REF_PAGE)) {
fprintf(fp, "%s", vma_header);
ref->cmdflags |= VM_REF_VMA;
ref->cmdflags &= ~VM_REF_PAGE;
ref->ref1 = vma;
}
PRINT_VMA_DATA();
}
if (vm_area_page_dump(vma, task,
vm_start, vm_end, vm_mm, ref)) {
if (!(ref->cmdflags & VM_REF_HEADER)) {
print_task_header(fp, tc, 0);
PRINT_VM_DATA();
ref->cmdflags |= VM_REF_HEADER;
}
if (!(ref->cmdflags & VM_REF_VMA) ||
(ref->ref1 != vma)) {
fprintf(fp, "%s", vma_header);
PRINT_VMA_DATA();
ref->cmdflags |= VM_REF_VMA;
ref->ref1 = vma;
}
ref->cmdflags |= VM_REF_DISPLAY;
vm_area_page_dump(vma, task,
vm_start, vm_end, vm_mm, ref);
ref->cmdflags &= ~VM_REF_DISPLAY;
}
continue;
}
if (inode) {
fprintf(fp, "%lx%s%s%s%s%s%6llx%s%lx %s\n",
vma, space(MINSPACE),
mkstring(buf2, UVADDR_PRLEN, RJUST|LONG_HEX,
MKSTR(vm_start)), space(MINSPACE),
mkstring(buf3, UVADDR_PRLEN, RJUST|LONG_HEX,
MKSTR(vm_end)), space(MINSPACE),
vm_flags, space(MINSPACE), inode, buf1);
} else {
PRINT_VMA_DATA();
if (flag & (PHYSADDR|PRINT_SINGLE_VMA))
vm_area_page_dump(vma, task,
vm_start, vm_end, vm_mm, ref);
}
if (flag & UVADDR)
return vma;
}
}
if (flag & VERIFY_ADDR)
return (ulong)NULL;
if ((flag & PRINT_SINGLE_VMA) && !single_vma_found)
fprintf(fp, "(not found)\n");
if ((flag & UVADDR) && !found)
fprintf(fp, "(not found)\n");
if (VM_REF_FOUND(ref))
fprintf(fp, "\n");
return (ulong)NULL;
}
static int
vm_area_page_dump(ulong vma,
ulong task,
ulong start,
ulong end,
ulong mm,
struct reference *ref)
{
physaddr_t paddr;
ulong offs;
char *p1, *p2;
int display;
char buf1[BUFSIZE];
char buf2[BUFSIZE];
char buf3[BUFSIZE];
char buf4[BUFSIZE];
if (mm == symbol_value("init_mm"))
return FALSE;
if (!ref || DO_REF_DISPLAY(ref))
fprintf(fp, "%s %s\n",
mkstring(buf1, UVADDR_PRLEN, LJUST, "VIRTUAL"),
mkstring(buf2, MAX(PADDR_PRLEN, strlen("PHYSICAL")),
LJUST, "PHYSICAL"));
if (DO_REF_DISPLAY(ref)) {
start = ref->ref2;
}
while (start < end) {
display = DO_REF_SEARCH(ref) ? FALSE : TRUE;
if (VM_REF_CHECK_HEXVAL(ref, start)) {
if (DO_REF_DISPLAY(ref))
display = TRUE;
else {
ref->cmdflags |= VM_REF_PAGE;
ref->ref2 = start;
return TRUE;
}
}
if (uvtop(task_to_context(task), start, &paddr, 0)) {
sprintf(buf3, "%s %s\n",
mkstring(buf1, UVADDR_PRLEN, LJUST|LONG_HEX,
MKSTR(start)),
mkstring(buf2, MAX(PADDR_PRLEN,
strlen("PHYSICAL")), RJUST|LONGLONG_HEX,
MKSTR(&paddr)));
if (VM_REF_CHECK_HEXVAL(ref, paddr)) {
if (DO_REF_DISPLAY(ref))
display = TRUE;
else {
ref->cmdflags |= VM_REF_PAGE;
ref->ref2 = start;
return TRUE;
}
}
} else if (paddr && swap_location(paddr, buf1)) {
sprintf(buf3, "%s SWAP: %s\n",
mkstring(buf2, UVADDR_PRLEN, LJUST|LONG_HEX,
MKSTR(start)), buf1);
if (DO_REF_SEARCH(ref)) {
if (VM_REF_CHECK_DECVAL(ref,
THIS_KERNEL_VERSION >= LINUX(2,6,0) ?
__swp_offset(paddr) : SWP_OFFSET(paddr))) {
if (DO_REF_DISPLAY(ref))
display = TRUE;
else {
ref->cmdflags |= VM_REF_PAGE;
ref->ref2 = start;
return TRUE;
}
}
strcpy(buf4, buf3);
p1 = strstr(buf4, "SWAP:") + strlen("SWAP: ");
p2 = strstr(buf4, " OFFSET:");
*p2 = NULLCHAR;
if (VM_REF_CHECK_STRING(ref, p1)) {
if (DO_REF_DISPLAY(ref))
display = TRUE;
else {
ref->cmdflags |= VM_REF_PAGE;
ref->ref2 = start;
return TRUE;
}
}
}
} else if (vma_file_offset(vma, start, buf1)) {
sprintf(buf3, "%s FILE: %s\n",
mkstring(buf2, UVADDR_PRLEN, LJUST|LONG_HEX,
MKSTR(start)), buf1);
if (DO_REF_SEARCH(ref)) {
extract_hex(strstr(buf3, "OFFSET:") +
strlen("OFFSET: "), &offs, 0, 0);
if (VM_REF_CHECK_HEXVAL(ref, offs)) {
if (DO_REF_DISPLAY(ref))
display = TRUE;
else {
ref->cmdflags |= VM_REF_PAGE;
ref->ref2 = start;
return TRUE;
}
}
}
} else {
sprintf(buf3, "%s (not mapped)\n",
mkstring(buf1, UVADDR_PRLEN, LJUST|LONG_HEX,
MKSTR(start)));
}
if (display)
fprintf(fp, "%s", buf3);
start += PAGESIZE();
}
return FALSE;
}
/*
* Cache the passed-in vm_area_struct.
*/
char *
fill_vma_cache(ulong vma)
{
int i;
char *cache;
vt->vma_cache_fills++;
for (i = 0; i < VMA_CACHE; i++) {
if (vt->cached_vma[i] == vma) {
vt->cached_vma_hits[i]++;
cache = vt->vma_cache + (SIZE(vm_area_struct)*i);
return(cache);
}
}
cache = vt->vma_cache + (SIZE(vm_area_struct)*vt->vma_cache_index);
readmem(vma, KVADDR, cache, SIZE(vm_area_struct),
"fill_vma_cache", FAULT_ON_ERROR);
vt->cached_vma[vt->vma_cache_index] = vma;
vt->vma_cache_index = (vt->vma_cache_index+1) % VMA_CACHE;
return(cache);
}
/*
* If active, clear the vm_area_struct references.
*/
void
clear_vma_cache(void)
{
int i;
if (DUMPFILE())
return;
for (i = 0; i < VMA_CACHE; i++) {
vt->cached_vma[i] = 0;
vt->cached_vma_hits[i] = 0;
}
vt->vma_cache_fills = 0;
vt->vma_cache_index = 0;
}
/*
* Check whether an address is a user stack address based
* upon its vm_area_struct flags.
*/
int
in_user_stack(ulong task, ulong vaddr)
{
ulong vma;
ulonglong vm_flags;
char *vma_buf;
if ((vma = vm_area_dump(task, UVADDR|VERIFY_ADDR, vaddr, 0))) {
vma_buf = fill_vma_cache(vma);
vm_flags = get_vm_flags(vma_buf);
if (vm_flags & VM_GROWSDOWN)
return TRUE;
else if (kernel_symbol_exists("expand_upwards") &&
(vm_flags & VM_GROWSUP))
return TRUE;
/*
* per-thread stack
*/
if ((vm_flags & (VM_READ|VM_WRITE)) == (VM_READ|VM_WRITE))
return TRUE;
}
return FALSE;
}
/*
* Fill in the task_mem_usage structure with the RSS, virtual memory size,
* percent of physical memory being used, and the mm_struct address.
*/
void
get_task_mem_usage(ulong task, struct task_mem_usage *tm)
{
struct task_context *tc;
long rss = 0;
BZERO(tm, sizeof(struct task_mem_usage));
if (IS_ZOMBIE(task) || IS_EXITING(task))
return;
tc = task_to_context(task);
if (!tc || !tc->mm_struct) /* probably a kernel thread */
return;
tm->mm_struct_addr = tc->mm_struct;
if (!task_mm(task, TRUE))
return;
if (VALID_MEMBER(mm_struct_rss))
/*
* mm_struct.rss or mm_struct._rss exist.
*/
tm->rss = ULONG(tt->mm_struct + OFFSET(mm_struct_rss));
else {
/*
* Latest kernels have mm_struct.mm_rss_stat[].
*/
if (VALID_MEMBER(mm_struct_rss_stat)) {
long anonpages, filepages;
if (!enumerator_value("MM_FILEPAGES", &filepages) ||
!enumerator_value("MM_ANONPAGES", &anonpages)) {
filepages = 0;
anonpages = 1;
}
rss += LONG(tt->mm_struct +
OFFSET(mm_struct_rss_stat) +
OFFSET(mm_rss_stat_count) +
(filepages * sizeof(long)));
rss += LONG(tt->mm_struct +
OFFSET(mm_struct_rss_stat) +
OFFSET(mm_rss_stat_count) +
(anonpages * sizeof(long)));
}
/* Check whether SPLIT_RSS_COUNTING is enabled */
if (VALID_MEMBER(task_struct_rss_stat)) {
int i, sync_rss;
ulong tgid;
struct task_context *tc1;
tgid = task_tgid(task);
tc1 = FIRST_CONTEXT();
for (i = 0; i < RUNNING_TASKS(); i++, tc1++) {
if (task_tgid(tc1->task) != tgid)
continue;
/* count 0 -> filepages */
if (!readmem(tc1->task +
OFFSET(task_struct_rss_stat) +
OFFSET(task_rss_stat_count), KVADDR,
&sync_rss,
sizeof(int),
"task_struct rss_stat MM_FILEPAGES",
RETURN_ON_ERROR))
continue;
rss += sync_rss;
/* count 1 -> anonpages */
if (!readmem(tc1->task +
OFFSET(task_struct_rss_stat) +
OFFSET(task_rss_stat_count) +
sizeof(int),
KVADDR, &sync_rss,
sizeof(int),
"task_struct rss_stat MM_ANONPAGES",
RETURN_ON_ERROR))
continue;
rss += sync_rss;
}
}
/*
* mm_struct._anon_rss and mm_struct._file_rss should exist.
*/
if (VALID_MEMBER(mm_struct_anon_rss))
rss += LONG(tt->mm_struct + OFFSET(mm_struct_anon_rss));
if (VALID_MEMBER(mm_struct_file_rss))
rss += LONG(tt->mm_struct + OFFSET(mm_struct_file_rss));
tm->rss = (unsigned long)rss;
}
tm->total_vm = ULONG(tt->mm_struct + OFFSET(mm_struct_total_vm));
tm->pgd_addr = ULONG(tt->mm_struct + OFFSET(mm_struct_pgd));
if (is_kernel_thread(task))
return;
tm->pct_physmem = ((double)(tm->rss*100)) /
((double)(MIN(vt->total_pages,
vt->num_physpages ? vt->num_physpages : vt->total_pages)));
}
/*
* cmd_kmem() is designed as a multi-purpose kernel memory investigator with
* the flag argument sending it off in a multitude of areas. To date, the
* following options are defined:
*
* -f displays the contents of the system free_area[] array headers;
* also verifies that the page count equals nr_free_pages
* -F same as -f, but also dumps all pages linked to that header.
* -p displays basic information about each page in the system
* mem_map[] array.
* -s displays kmalloc() slab data.
* -S same as -s, but displays all kmalloc() objects.
* -v displays the vmlist entries.
* -c displays the number of pages in the page_hash_table.
* -C displays all entries in the page_hash_table.
* -i displays informational data shown by /proc/meminfo.
* -h hugepage information from hstates[] array
*
* -P forces address to be defined as a physical address
* address when used with -f, the address can be either a page pointer
* or a physical address; the free_area header containing the page
* (if any) is displayed.
* When used with -p, the address can be either a page pointer or a
* physical address; its basic mem_map page information is displayed.
* When used with -c, the page_hash_table entry containing the
* page pointer is displayed.
*/
/* Note: VERBOSE is 0x1, ADDRESS_SPECIFIED is 0x2 */
#define GET_TOTALRAM_PAGES (ADDRESS_SPECIFIED << 1)
#define GET_SHARED_PAGES (ADDRESS_SPECIFIED << 2)
#define GET_FREE_PAGES (ADDRESS_SPECIFIED << 3)
#define GET_FREE_HIGHMEM_PAGES (ADDRESS_SPECIFIED << 4)
#define GET_ZONE_SIZES (ADDRESS_SPECIFIED << 5)
#define GET_HIGHEST (ADDRESS_SPECIFIED << 6)
#define GET_BUFFERS_PAGES (ADDRESS_SPECIFIED << 7)
#define GET_SLAB_PAGES (ADDRESS_SPECIFIED << 8)
#define GET_PHYS_TO_VMALLOC (ADDRESS_SPECIFIED << 9)
#define GET_ACTIVE_LIST (ADDRESS_SPECIFIED << 10)
#define GET_INACTIVE_LIST (ADDRESS_SPECIFIED << 11)
#define GET_INACTIVE_CLEAN (ADDRESS_SPECIFIED << 12) /* obsolete */
#define GET_INACTIVE_DIRTY (ADDRESS_SPECIFIED << 13) /* obsolete */
#define SLAB_GET_COUNTS (ADDRESS_SPECIFIED << 14)
#define SLAB_WALKTHROUGH (ADDRESS_SPECIFIED << 15)
#define GET_VMLIST_COUNT (ADDRESS_SPECIFIED << 16)
#define GET_VMLIST (ADDRESS_SPECIFIED << 17)
#define SLAB_DATA_NOSAVE (ADDRESS_SPECIFIED << 18)
#define GET_SLUB_SLABS (ADDRESS_SPECIFIED << 19)
#define GET_SLUB_OBJECTS (ADDRESS_SPECIFIED << 20)
#define VMLIST_VERIFY (ADDRESS_SPECIFIED << 21)
#define SLAB_FIRST_NODE (ADDRESS_SPECIFIED << 22)
#define CACHE_SET (ADDRESS_SPECIFIED << 23)
#define SLAB_OVERLOAD_PAGE_PTR (ADDRESS_SPECIFIED << 24)
#define SLAB_BITFIELD (ADDRESS_SPECIFIED << 25)
#define GET_ALL \
(GET_SHARED_PAGES|GET_TOTALRAM_PAGES|GET_BUFFERS_PAGES|GET_SLAB_PAGES)
void
cmd_kmem(void)
{
int i;
int c;
int sflag, Sflag, pflag, fflag, Fflag, vflag, zflag, oflag, gflag;
int nflag, cflag, Cflag, iflag, lflag, Lflag, Pflag, Vflag, hflag;
struct meminfo meminfo;
ulonglong value[MAXARGS];
char buf[BUFSIZE];
char *p1;
int spec_addr, escape;
spec_addr = 0;
sflag = Sflag = pflag = fflag = Fflag = Pflag = zflag = oflag = 0;
vflag = Cflag = cflag = iflag = nflag = lflag = Lflag = Vflag = 0;
gflag = hflag = 0;
escape = FALSE;
BZERO(&meminfo, sizeof(struct meminfo));
BZERO(&value[0], sizeof(ulonglong)*MAXARGS);
while ((c = getopt(argcnt, args, "gI:sSFfpvczCinl:L:PVoh")) != EOF) {
switch(c)
{
case 'V':
Vflag = 1;
break;
case 'n':
nflag = 1;
break;
case 'z':
zflag = 1;
break;
case 'i':
iflag = 1;
break;
case 'h':
hflag = 1;
break;
case 'C':
Cflag = 1, cflag = 0;;
break;
case 'c':
cflag = 1, Cflag = 0;
break;
case 'v':
vflag = 1;
break;
case 's':
sflag = 1; Sflag = 0;
break;
case 'S':
Sflag = 1; sflag = 0;
break;
case 'F':
Fflag = 1; fflag = 0;
break;;
case 'f':
fflag = 1; Fflag = 0;
break;;
case 'p':
pflag = 1;
break;
case 'I':
meminfo.ignore = optarg;
break;
case 'l':
if (STREQ(optarg, "a")) {
meminfo.flags |= GET_ACTIVE_LIST;
lflag = 1; Lflag = 0;
} else if (STREQ(optarg, "i")) {
meminfo.flags |= GET_INACTIVE_LIST;
lflag = 1; Lflag = 0;
} else if (STREQ(optarg, "ic")) {
meminfo.flags |= GET_INACTIVE_CLEAN;
lflag = 1; Lflag = 0;
} else if (STREQ(optarg, "id")) {
meminfo.flags |= GET_INACTIVE_DIRTY;
lflag = 1; Lflag = 0;
} else
argerrs++;
break;
case 'L':
if (STREQ(optarg, "a")) {
meminfo.flags |= GET_ACTIVE_LIST;
Lflag = 1; lflag = 0;
} else if (STREQ(optarg, "i")) {
meminfo.flags |= GET_INACTIVE_LIST;
Lflag = 1; lflag = 0;
} else if (STREQ(optarg, "ic")) {
meminfo.flags |= GET_INACTIVE_CLEAN;
Lflag = 1; lflag = 0;
} else if (STREQ(optarg, "id")) {
meminfo.flags |= GET_INACTIVE_DIRTY;
Lflag = 1; lflag = 0;
} else
argerrs++;
break;
case 'P':
Pflag = 1;
break;
case 'o':
oflag = 1;
break;
case 'g':
gflag = 1;
break;
default:
argerrs++;
break;
}
}
if (argerrs)
cmd_usage(pc->curcmd, SYNOPSIS);
if ((sflag + Sflag + pflag + fflag + Fflag + Vflag + oflag +
vflag + Cflag + cflag + iflag + lflag + Lflag + gflag + hflag) > 1) {
error(INFO, "only one flag allowed!\n");
cmd_usage(pc->curcmd, SYNOPSIS);
}
if (sflag || Sflag || !(vt->flags & KMEM_CACHE_INIT))
kmem_cache_init();
while (args[optind]) {
if (hexadecimal(args[optind], 0)) {
value[spec_addr++] =
htoll(args[optind], FAULT_ON_ERROR, NULL);
} else {
if (meminfo.reqname)
error(FATAL,
"only one kmem_cache reference is allowed\n");
meminfo.reqname = args[optind];
if (args[optind][0] == '\\') {
meminfo.reqname = &args[optind][1];
escape = TRUE;
} else
meminfo.reqname = args[optind];
if (!sflag && !Sflag)
cmd_usage(pc->curcmd, SYNOPSIS);
}
optind++;
}
for (i = 0; i < spec_addr; i++) {
if (Pflag)
meminfo.memtype = PHYSADDR;
else
meminfo.memtype = IS_KVADDR(value[i]) ?
KVADDR : PHYSADDR;
if (fflag) {
meminfo.spec_addr = value[i];
meminfo.flags = ADDRESS_SPECIFIED;
if (meminfo.calls++)
fprintf(fp, "\n");
vt->dump_free_pages(&meminfo);
fflag++;
}
if (pflag) {
meminfo.spec_addr = value[i];
meminfo.flags = ADDRESS_SPECIFIED;
dump_mem_map(&meminfo);
pflag++;
}
if (sflag || Sflag) {
if (vt->flags & KMEM_CACHE_UNAVAIL)
error(FATAL,
"kmem cache slab subsystem not available\n");
meminfo.flags = Sflag ? VERBOSE : 0;
if (meminfo.memtype == PHYSADDR) {
if (value[i] < VTOP(vt->high_memory)) {
value[i] = PTOV(value[i]);
meminfo.memtype = KVADDR;
} else
error(WARNING,
"cannot make virtual-to-physical translation: %llx\n",
value[i]);
}
if ((p1 = is_kmem_cache_addr(value[i], buf))) {
if (meminfo.reqname)
error(FATAL,
"only one kmem_cache reference is allowed\n");
meminfo.reqname = p1;
meminfo.cache = value[i];
meminfo.flags |= CACHE_SET;
if ((i+1) == spec_addr) { /* done? */
if (meminfo.calls++)
fprintf(fp, "\n");
vt->dump_kmem_cache(&meminfo);
}
meminfo.flags &= ~CACHE_SET;
} else {
meminfo.spec_addr = value[i];
meminfo.flags = ADDRESS_SPECIFIED;
if (Sflag && (vt->flags & KMALLOC_SLUB))
meminfo.flags |= VERBOSE;
if (meminfo.calls++)
fprintf(fp, "\n");
vt->dump_kmem_cache(&meminfo);
}
if (sflag)
sflag++;
if (Sflag)
Sflag++;
}
if (vflag) {
meminfo.spec_addr = value[i];
meminfo.flags = ADDRESS_SPECIFIED;
dump_vmlist(&meminfo);
vflag++;
}
if (cflag) {
meminfo.spec_addr = value[i];
meminfo.flags = ADDRESS_SPECIFIED;
if (meminfo.calls++)
fprintf(fp, "\n");
dump_page_hash_table(&meminfo);
cflag++;
}
if (lflag) {
meminfo.spec_addr = value[i];
meminfo.flags |= (ADDRESS_SPECIFIED|VERBOSE);
if (meminfo.calls++)
fprintf(fp, "\n");
dump_page_lists(&meminfo);
lflag++;
}
if (gflag) {
if (i)
fprintf(fp, "\n");
dump_page_flags(value[i]);
gflag++;
}
/*
* no value arguments allowed!
*/
if (zflag || nflag || iflag || Fflag || Cflag || Lflag ||
Vflag || oflag || hflag) {
error(INFO,
"no address arguments allowed with this option\n");
cmd_usage(pc->curcmd, SYNOPSIS);
}
if (!(sflag + Sflag + pflag + fflag + vflag + cflag +
lflag + Lflag + gflag)) {
meminfo.spec_addr = value[i];
meminfo.flags = ADDRESS_SPECIFIED;
if (meminfo.calls++)
fprintf(fp, "\n");
else
kmem_cache_init();
kmem_search(&meminfo);
}
}
if (iflag == 1)
dump_kmeminfo();
if (pflag == 1)
dump_mem_map(&meminfo);
if (fflag == 1)
vt->dump_free_pages(&meminfo);
if (Fflag == 1) {
meminfo.flags = VERBOSE;
vt->dump_free_pages(&meminfo);
}
if (hflag == 1)
dump_hstates();
if (sflag == 1) {
if (!escape && STREQ(meminfo.reqname, "list"))
kmem_cache_list();
else if (vt->flags & KMEM_CACHE_UNAVAIL)
error(FATAL,
"kmem cache slab subsystem not available\n");
else
vt->dump_kmem_cache(&meminfo);
}
if (Sflag == 1) {
if (STREQ(meminfo.reqname, "list"))
kmem_cache_list();
else if (vt->flags & KMEM_CACHE_UNAVAIL)
error(FATAL,
"kmem cache slab subsystem not available\n");
else {
meminfo.flags = VERBOSE;
vt->dump_kmem_cache(&meminfo);
}
}
if (vflag == 1)
dump_vmlist(&meminfo);
if (Cflag == 1) {
meminfo.flags = VERBOSE;
dump_page_hash_table(&meminfo);
}
if (cflag == 1)
dump_page_hash_table(&meminfo);
if (nflag == 1)
dump_memory_nodes(MEMORY_NODES_DUMP);
if (zflag == 1)
dump_zone_stats();
if (lflag == 1) {
dump_page_lists(&meminfo);
}
if (Lflag == 1) {
meminfo.flags |= VERBOSE;
dump_page_lists(&meminfo);
}
if (Vflag == 1) {
dump_vm_stat(NULL, NULL, 0);
dump_page_states();
dump_vm_event_state();
}
if (oflag == 1)
dump_per_cpu_offsets();
if (gflag == 1)
dump_page_flags(0);
if (!(sflag + Sflag + pflag + fflag + Fflag + vflag +
Vflag + zflag + oflag + cflag + Cflag + iflag +
nflag + lflag + Lflag + gflag + hflag + meminfo.calls))
cmd_usage(pc->curcmd, SYNOPSIS);
}
static void
PG_reserved_flag_init(void)
{
ulong pageptr;
int count;
ulong vaddr, flags;
char *buf;
if (enumerator_value("PG_reserved", (long *)&flags)) {
vt->PG_reserved = 1 << flags;
if (CRASHDEBUG(2))
fprintf(fp, "PG_reserved (enum): %lx\n", vt->PG_reserved);
return;
}
vaddr = kt->stext ? kt->stext : symbol_value("sys_read");
if (!phys_to_page((physaddr_t)VTOP(vaddr), &pageptr))
return;
buf = (char *)GETBUF(SIZE(page));
if (!readmem(pageptr, KVADDR, buf, SIZE(page),
"reserved page", RETURN_ON_ERROR|QUIET)) {
FREEBUF(buf);
return;
}
flags = ULONG(buf + OFFSET(page_flags));
count = INT(buf + OFFSET(page_count));
if (count_bits_long(flags) == 1)
vt->PG_reserved = flags;
else
vt->PG_reserved = 1 << (ffsl(flags)-1);
if (count == -1)
vt->flags |= PGCNT_ADJ;
if (CRASHDEBUG(2))
fprintf(fp,
"PG_reserved: vaddr: %lx page: %lx flags: %lx => %lx\n",
vaddr, pageptr, flags, vt->PG_reserved);
FREEBUF(buf);
}
static void
PG_slab_flag_init(void)
{
int bit;
ulong pageptr;
ulong vaddr, flags, flags2;
char buf[BUFSIZE]; /* safe for a page struct */
/*
* Set the old defaults in case all else fails.
*/
if (enumerator_value("PG_slab", (long *)&flags)) {
vt->PG_slab = flags;
if (CRASHDEBUG(2))
fprintf(fp, "PG_slab (enum): %lx\n", vt->PG_slab);
} else if (VALID_MEMBER(page_pte)) {
if (THIS_KERNEL_VERSION < LINUX(2,6,0))
vt->PG_slab = 10;
else if (THIS_KERNEL_VERSION >= LINUX(2,6,0))
vt->PG_slab = 7;
} else if (THIS_KERNEL_VERSION >= LINUX(2,6,0)) {
vt->PG_slab = 7;
} else {
if (try_get_symbol_data("vm_area_cachep", sizeof(void *), &vaddr) &&
phys_to_page((physaddr_t)VTOP(vaddr), &pageptr) &&
readmem(pageptr, KVADDR, buf, SIZE(page),
"vm_area_cachep page", RETURN_ON_ERROR|QUIET)) {
flags = ULONG(buf + OFFSET(page_flags));
if ((bit = ffsl(flags))) {
vt->PG_slab = bit - 1;
if (CRASHDEBUG(2))
fprintf(fp,
"PG_slab bit: vaddr: %lx page: %lx flags: %lx => %ld\n",
vaddr, pageptr, flags, vt->PG_slab);
}
}
}
if (vt->flags & KMALLOC_SLUB) {
/*
* PG_slab and the following are hardwired for
* kernels prior to the pageflags enumerator.
*/
#define PG_compound 14 /* Part of a compound page */
#define PG_reclaim 17 /* To be reclaimed asap */
vt->PG_head_tail_mask = ((1L << PG_compound) | (1L << PG_reclaim));
if (enumerator_value("PG_tail", (long *)&flags))
vt->PG_head_tail_mask = (1L << flags);
else if (enumerator_value("PG_compound", (long *)&flags) &&
enumerator_value("PG_reclaim", (long *)&flags2)) {
vt->PG_head_tail_mask = ((1L << flags) | (1L << flags2));
if (CRASHDEBUG(2))
fprintf(fp, "PG_head_tail_mask: %lx\n",
vt->PG_head_tail_mask);
}
} else {
if (enumerator_value("PG_tail", (long *)&flags))
vt->PG_head_tail_mask = (1L << flags);
else if (enumerator_value("PG_compound", (long *)&flags) &&
enumerator_value("PG_reclaim", (long *)&flags2)) {
vt->PG_head_tail_mask = ((1L << flags) | (1L << flags2));
if (CRASHDEBUG(2))
fprintf(fp, "PG_head_tail_mask: %lx (PG_compound|PG_reclaim)\n",
vt->PG_head_tail_mask);
}
}
if (!vt->PG_slab)
error(INFO, "cannot determine PG_slab bit value\n");
}
/*
* dump_mem_map() displays basic data about each entry in the mem_map[]
* array, or if an address is specified, just the mem_map[] entry for that
* address. Specified addresses can either be physical address or page
* structure pointers.
*/
/* Page flag bit values */
#define v22_PG_locked 0
#define v22_PG_error 1
#define v22_PG_referenced 2
#define v22_PG_dirty 3
#define v22_PG_uptodate 4
#define v22_PG_free_after 5
#define v22_PG_decr_after 6
#define v22_PG_swap_unlock_after 7
#define v22_PG_DMA 8
#define v22_PG_Slab 9
#define v22_PG_swap_cache 10
#define v22_PG_skip 11
#define v22_PG_reserved 31
#define v24_PG_locked 0
#define v24_PG_error 1
#define v24_PG_referenced 2
#define v24_PG_uptodate 3
#define v24_PG_dirty 4
#define v24_PG_decr_after 5
#define v24_PG_active 6
#define v24_PG_inactive_dirty 7
#define v24_PG_slab 8
#define v24_PG_swap_cache 9
#define v24_PG_skip 10
#define v24_PG_inactive_clean 11
#define v24_PG_highmem 12
#define v24_PG_checked 13 /* kill me in 2.5.<early>. */
#define v24_PG_bigpage 14
/* bits 21-30 unused */
#define v24_PG_arch_1 30
#define v24_PG_reserved 31
#define v26_PG_private 12
#define PGMM_CACHED (512)
static void
dump_mem_map_SPARSEMEM(struct meminfo *mi)
{
ulong i;
long total_pages;
int others, page_not_mapped, phys_not_mapped, page_mapping;
ulong pp, ppend;
physaddr_t phys, physend;
ulong tmp, reserved, shared, slabs;
ulong PG_reserved_flag;
long buffers;
ulong inode, offset, flags, mapping, index;
uint count;
int print_hdr, pg_spec, phys_spec, done;
int v22;
char hdr[BUFSIZE];
char buf1[BUFSIZE];
char buf2[BUFSIZE];
char buf3[BUFSIZE];
char buf4[BUFSIZE];
char *page_cache;
char *pcache;
ulong section, section_nr, nr_mem_sections, section_size;
long buffersize;
char *outputbuffer;
int bufferindex;
buffersize = 1024 * 1024;
outputbuffer = GETBUF(buffersize + 512);
char style1[100];
char style2[100];
char style3[100];
char style4[100];
sprintf((char *)&style1, "%%lx%s%%%dllx%s%%%dlx%s%%8lx %%2d%s",
space(MINSPACE),
(int)MAX(PADDR_PRLEN, strlen("PHYSICAL")),
space(MINSPACE),
VADDR_PRLEN,
space(MINSPACE),
space(MINSPACE));
sprintf((char *)&style2, "%%-%dlx%s%%%dllx%s%s%s%s %2s ",
VADDR_PRLEN,
space(MINSPACE),
(int)MAX(PADDR_PRLEN, strlen("PHYSICAL")),
space(MINSPACE),
mkstring(buf3, VADDR_PRLEN, CENTER|RJUST, " "),
space(MINSPACE),
mkstring(buf4, 8, CENTER|RJUST, " "),
" ");
sprintf((char *)&style3, "%%-%dlx%s%%%dllx%s%s%s%s %%2d ",
VADDR_PRLEN,
space(MINSPACE),
(int)MAX(PADDR_PRLEN, strlen("PHYSICAL")),
space(MINSPACE),
mkstring(buf3, VADDR_PRLEN, CENTER|RJUST, "-------"),
space(MINSPACE),
mkstring(buf4, 8, CENTER|RJUST, "-----"));
sprintf((char *)&style4, "%%-%dlx%s%%%dllx%s%%%dlx%s%%8lx %%2d ",
VADDR_PRLEN,
space(MINSPACE),
(int)MAX(PADDR_PRLEN, strlen("PHYSICAL")),
space(MINSPACE),
VADDR_PRLEN,
space(MINSPACE));
v22 = VALID_MEMBER(page_inode); /* page.inode vs. page.mapping */
if (v22) {
sprintf(hdr, "%s%s%s%s%s%s%s%sCNT FLAGS\n",
mkstring(buf1, VADDR_PRLEN, CENTER, "PAGE"),
space(MINSPACE),
mkstring(buf2, MAX(PADDR_PRLEN, strlen("PHYSICAL")),
RJUST, "PHYSICAL"),
space(MINSPACE),
mkstring(buf3, VADDR_PRLEN, CENTER|RJUST, "INODE"),
space(MINSPACE),
mkstring(buf4, 8, CENTER|LJUST, "OFFSET"),
space(MINSPACE-1));
} else {
sprintf(hdr, "%s%s%s%s%s%s%sCNT FLAGS\n",
mkstring(buf1, VADDR_PRLEN, CENTER, "PAGE"),
space(MINSPACE),
mkstring(buf2, MAX(PADDR_PRLEN, strlen("PHYSICAL")),
RJUST, "PHYSICAL"),
space(MINSPACE),
mkstring(buf3, VADDR_PRLEN, CENTER|RJUST, "MAPPING"),
space(MINSPACE),
mkstring(buf4, 8, CENTER|RJUST, "INDEX"));
}
mapping = index = 0;
reserved = shared = slabs = buffers = inode = offset = 0;
pg_spec = phys_spec = print_hdr = FALSE;
switch (mi->flags)
{
case ADDRESS_SPECIFIED:
switch (mi->memtype)
{
case KVADDR:
if (is_page_ptr(mi->spec_addr, NULL))
pg_spec = TRUE;
else {
if (kvtop(NULL, mi->spec_addr, &phys, 0)) {
mi->spec_addr = phys;
phys_spec = TRUE;
}
else
return;
}
break;
case PHYSADDR:
phys_spec = TRUE;
break;
default:
error(FATAL, "dump_mem_map: no memtype specified\n");
break;
}
print_hdr = TRUE;
break;
case GET_ALL:
shared = 0;
reserved = 0;
buffers = 0;
slabs = 0;
break;
case GET_SHARED_PAGES:
shared = 0;
break;
case GET_TOTALRAM_PAGES:
reserved = 0;
break;
case GET_BUFFERS_PAGES:
buffers = 0;
break;
case GET_SLAB_PAGES:
slabs = 0;
break;
default:
print_hdr = TRUE;
break;
}
page_cache = GETBUF(SIZE(page) * PGMM_CACHED);
done = FALSE;
total_pages = 0;
nr_mem_sections = NR_MEM_SECTIONS();
bufferindex = 0;
/*
* Iterate over all possible sections
*/
for (section_nr = 0; section_nr < nr_mem_sections ; section_nr++) {
if (CRASHDEBUG(2))
fprintf(fp, "section_nr = %ld\n", section_nr);
/*
* If we are looking up a specific address, jump directly
* to the section with that page
*/
if (mi->flags & ADDRESS_SPECIFIED) {
ulong pfn;
physaddr_t tmp;
if (pg_spec) {
if (!page_to_phys(mi->spec_addr, &tmp))
return;
pfn = tmp >> PAGESHIFT();
} else
pfn = mi->spec_addr >> PAGESHIFT();
section_nr = pfn_to_section_nr(pfn);
}
if (!(section = valid_section_nr(section_nr))) {
#ifdef NOTDEF
break; /* On a real sparsemem system we need to check
* every section as gaps may exist. But this
* can be slow. If we know we don't have gaps
* just stop validating sections when we
* get to the end of the valid ones.
* In the future find a way to short circuit
* this loop.
*/
#endif
if (mi->flags & ADDRESS_SPECIFIED)
break;
continue;
}
if (print_hdr) {
if (!(pc->curcmd_flags & HEADER_PRINTED))
fprintf(fp, "%s", hdr);
print_hdr = FALSE;
pc->curcmd_flags |= HEADER_PRINTED;
}
pp = section_mem_map_addr(section);
pp = sparse_decode_mem_map(pp, section_nr);
phys = (physaddr_t) section_nr * PAGES_PER_SECTION() * PAGESIZE();
section_size = PAGES_PER_SECTION();
for (i = 0; i < section_size;
i++, pp += SIZE(page), phys += PAGESIZE()) {
if ((i % PGMM_CACHED) == 0) {
ppend = pp + ((PGMM_CACHED-1) * SIZE(page));
physend = phys + ((PGMM_CACHED-1) * PAGESIZE());
if ((pg_spec && (mi->spec_addr > ppend)) ||
(phys_spec &&
(PHYSPAGEBASE(mi->spec_addr) > physend))) {
i += (PGMM_CACHED-1);
pp = ppend;
phys = physend;
continue;
}
fill_mem_map_cache(pp, ppend, page_cache);
}
pcache = page_cache + ((i%PGMM_CACHED) * SIZE(page));
if (received_SIGINT())
restart(0);
if ((pg_spec && (pp == mi->spec_addr)) ||
(phys_spec && (phys == PHYSPAGEBASE(mi->spec_addr))))
done = TRUE;
if (!done && (pg_spec || phys_spec))
continue;
flags = ULONG(pcache + OFFSET(page_flags));
if (SIZE(page_flags) == 4)
flags &= 0xffffffff;
count = UINT(pcache + OFFSET(page_count));
switch (mi->flags)
{
case GET_ALL:
case GET_BUFFERS_PAGES:
if (VALID_MEMBER(page_buffers)) {
tmp = ULONG(pcache +
OFFSET(page_buffers));
if (tmp)
buffers++;
} else if (THIS_KERNEL_VERSION >= LINUX(2,6,0)) {
if ((flags >> v26_PG_private) & 1)
buffers++;
} else
error(FATAL,
"cannot determine whether pages have buffers\n");
if (mi->flags != GET_ALL)
continue;
/* FALLTHROUGH */
case GET_SLAB_PAGES:
if (v22) {
if ((flags >> v22_PG_Slab) & 1)
slabs++;
} else if (vt->PG_slab) {
if ((flags >> vt->PG_slab) & 1)
slabs++;
} else {
if ((flags >> v24_PG_slab) & 1)
slabs++;
}
if (mi->flags != GET_ALL)
continue;
/* FALLTHROUGH */
case GET_SHARED_PAGES:
case GET_TOTALRAM_PAGES:
if (vt->PG_reserved)
PG_reserved_flag = vt->PG_reserved;
else
PG_reserved_flag = v22 ?
1 << v22_PG_reserved :
1 << v24_PG_reserved;
if (flags & PG_reserved_flag) {
reserved++;
} else {
if ((int)count >
(vt->flags & PGCNT_ADJ ? 0 : 1))
shared++;
}
continue;
}
page_mapping = VALID_MEMBER(page_mapping);
if (v22) {
inode = ULONG(pcache + OFFSET(page_inode));
offset = ULONG(pcache + OFFSET(page_offset));
} else if (page_mapping) {
mapping = ULONG(pcache +
OFFSET(page_mapping));
index = ULONG(pcache + OFFSET(page_index));
}
page_not_mapped = phys_not_mapped = FALSE;
if (v22) {
bufferindex += sprintf(outputbuffer+bufferindex,
(char *)&style1, pp, phys, inode,
offset, count);
} else {
if ((vt->flags & V_MEM_MAP)) {
if (!machdep->verify_paddr(phys))
phys_not_mapped = TRUE;
if (!kvtop(NULL, pp, NULL, 0))
page_not_mapped = TRUE;
}
if (page_not_mapped)
bufferindex += sprintf(outputbuffer+bufferindex,
(char *)&style2, pp, phys);
else if (!page_mapping)
bufferindex += sprintf(outputbuffer+bufferindex,
(char *)&style3, pp, phys, count);
else
bufferindex += sprintf(outputbuffer+bufferindex,
(char *)&style4, pp, phys,
mapping, index, count);
}
others = 0;
#define sprintflag(X) sprintf(outputbuffer + bufferindex, X, others++ ? "," : "")
if (v22) {
if ((flags >> v22_PG_DMA) & 1)
bufferindex += sprintflag("%sDMA");
if ((flags >> v22_PG_locked) & 1)
bufferindex += sprintflag("%slocked");
if ((flags >> v22_PG_error) & 1)
bufferindex += sprintflag("%serror");
if ((flags >> v22_PG_referenced) & 1)
bufferindex += sprintflag("%sreferenced");
if ((flags >> v22_PG_dirty) & 1)
bufferindex += sprintflag("%sdirty");
if ((flags >> v22_PG_uptodate) & 1)
bufferindex += sprintflag("%suptodate");
if ((flags >> v22_PG_free_after) & 1)
bufferindex += sprintflag("%sfree_after");
if ((flags >> v22_PG_decr_after) & 1)
bufferindex += sprintflag("%sdecr_after");
if ((flags >> v22_PG_swap_unlock_after) & 1)
bufferindex += sprintflag("%sswap_unlock_after");
if ((flags >> v22_PG_Slab) & 1)
bufferindex += sprintflag("%sslab");
if ((flags >> v22_PG_swap_cache) & 1)
bufferindex += sprintflag("%sswap_cache");
if ((flags >> v22_PG_skip) & 1)
bufferindex += sprintflag("%sskip");
if ((flags >> v22_PG_reserved) & 1)
bufferindex += sprintflag("%sreserved");
bufferindex += sprintf(outputbuffer+bufferindex, "\n");
} else if (THIS_KERNEL_VERSION > LINUX(2,4,9)) {
if (vt->flags & PAGEFLAGS)
bufferindex += translate_page_flags(outputbuffer+bufferindex, flags);
else
bufferindex += sprintf(outputbuffer+bufferindex, "%lx\n", flags);
} else {
if ((flags >> v24_PG_locked) & 1)
bufferindex += sprintflag("%slocked");
if ((flags >> v24_PG_error) & 1)
bufferindex += sprintflag("%serror");
if ((flags >> v24_PG_referenced) & 1)
bufferindex += sprintflag("%sreferenced");
if ((flags >> v24_PG_uptodate) & 1)
bufferindex += sprintflag("%suptodate");
if ((flags >> v24_PG_dirty) & 1)
bufferindex += sprintflag("%sdirty");
if ((flags >> v24_PG_decr_after) & 1)
bufferindex += sprintflag("%sdecr_after");
if ((flags >> v24_PG_active) & 1)
bufferindex += sprintflag("%sactive");
if ((flags >> v24_PG_inactive_dirty) & 1)
bufferindex += sprintflag("%sinactive_dirty");
if ((flags >> v24_PG_slab) & 1)
bufferindex += sprintflag("%sslab");
if ((flags >> v24_PG_swap_cache) & 1)
bufferindex += sprintflag("%sswap_cache");
if ((flags >> v24_PG_skip) & 1)
bufferindex += sprintflag("%sskip");
if ((flags >> v24_PG_inactive_clean) & 1)
bufferindex += sprintflag("%sinactive_clean");
if ((flags >> v24_PG_highmem) & 1)
bufferindex += sprintflag("%shighmem");
if ((flags >> v24_PG_checked) & 1)
bufferindex += sprintflag("%schecked");
if ((flags >> v24_PG_bigpage) & 1)
bufferindex += sprintflag("%sbigpage");
if ((flags >> v24_PG_arch_1) & 1)
bufferindex += sprintflag("%sarch_1");
if ((flags >> v24_PG_reserved) & 1)
bufferindex += sprintflag("%sreserved");
if (phys_not_mapped)
bufferindex += sprintflag("%s[NOT MAPPED]");
bufferindex += sprintf(outputbuffer+bufferindex, "\n");
}
if (bufferindex > buffersize) {
fprintf(fp, "%s", outputbuffer);
bufferindex = 0;
}
if (done)
break;
}
if (done)
break;
}
if (bufferindex > 0) {
fprintf(fp, "%s", outputbuffer);
}
switch (mi->flags)
{
case GET_TOTALRAM_PAGES:
mi->retval = total_pages - reserved;
break;
case GET_SHARED_PAGES:
mi->retval = shared;
break;
case GET_BUFFERS_PAGES:
mi->retval = buffers;
break;
case GET_SLAB_PAGES:
mi->retval = slabs;
break;
case GET_ALL:
mi->get_totalram = total_pages - reserved;
mi->get_shared = shared;
mi->get_buffers = buffers;
mi->get_slabs = slabs;
break;
case ADDRESS_SPECIFIED:
mi->retval = done;
break;
}
FREEBUF(outputbuffer);
FREEBUF(page_cache);
}
static void
dump_mem_map(struct meminfo *mi)
{
long i, n;
long total_pages;
int others, page_not_mapped, phys_not_mapped, page_mapping;
ulong pp, ppend;
physaddr_t phys, physend;
ulong tmp, reserved, shared, slabs;
ulong PG_reserved_flag;
long buffers;
ulong inode, offset, flags, mapping, index;
ulong node_size;
uint count;
int print_hdr, pg_spec, phys_spec, done;
int v22;
struct node_table *nt;
char hdr[BUFSIZE];
char buf1[BUFSIZE];
char buf2[BUFSIZE];
char buf3[BUFSIZE];
char buf4[BUFSIZE];
char *page_cache;
char *pcache;
long buffersize;
char *outputbuffer;
int bufferindex;
buffersize = 1024 * 1024;
outputbuffer = GETBUF(buffersize + 512);
char style1[100];
char style2[100];
char style3[100];
char style4[100];
if (IS_SPARSEMEM()) {
dump_mem_map_SPARSEMEM(mi);
return;
}
sprintf((char *)&style1, "%%lx%s%%%dllx%s%%%dlx%s%%8lx %%2d%s",
space(MINSPACE),
(int)MAX(PADDR_PRLEN, strlen("PHYSICAL")),
space(MINSPACE),
VADDR_PRLEN,
space(MINSPACE),
space(MINSPACE));
sprintf((char *)&style2, "%%-%dlx%s%%%dllx%s%s%s%s %2s ",
VADDR_PRLEN,
space(MINSPACE),
(int)MAX(PADDR_PRLEN, strlen("PHYSICAL")),
space(MINSPACE),
mkstring(buf3, VADDR_PRLEN, CENTER|RJUST, " "),
space(MINSPACE),
mkstring(buf4, 8, CENTER|RJUST, " "),
" ");
sprintf((char *)&style3, "%%-%dlx%s%%%dllx%s%s%s%s %%2d ",
VADDR_PRLEN,
space(MINSPACE),
(int)MAX(PADDR_PRLEN, strlen("PHYSICAL")),
space(MINSPACE),
mkstring(buf3, VADDR_PRLEN, CENTER|RJUST, "-------"),
space(MINSPACE),
mkstring(buf4, 8, CENTER|RJUST, "-----"));
sprintf((char *)&style4, "%%-%dlx%s%%%dllx%s%%%dlx%s%%8lx %%2d ",
VADDR_PRLEN,
space(MINSPACE),
(int)MAX(PADDR_PRLEN, strlen("PHYSICAL")),
space(MINSPACE),
VADDR_PRLEN,
space(MINSPACE));
v22 = VALID_MEMBER(page_inode); /* page.inode vs. page.mapping */
if (v22) {
sprintf(hdr, "%s%s%s%s%s%s%s%sCNT FLAGS\n",
mkstring(buf1, VADDR_PRLEN, CENTER, "PAGE"),
space(MINSPACE),
mkstring(buf2, MAX(PADDR_PRLEN, strlen("PHYSICAL")),
RJUST, "PHYSICAL"),
space(MINSPACE),
mkstring(buf3, VADDR_PRLEN, CENTER|RJUST, "INODE"),
space(MINSPACE),
mkstring(buf4, 8, CENTER|LJUST, "OFFSET"),
space(MINSPACE-1));
} else {
sprintf(hdr, "%s%s%s%s%s%s%sCNT FLAGS\n",
mkstring(buf1, VADDR_PRLEN, CENTER, "PAGE"),
space(MINSPACE),
mkstring(buf2, MAX(PADDR_PRLEN, strlen("PHYSICAL")),
RJUST, "PHYSICAL"),
space(MINSPACE),
mkstring(buf3, VADDR_PRLEN, CENTER|RJUST, "MAPPING"),
space(MINSPACE),
mkstring(buf4, 8, CENTER|RJUST, "INDEX"));
}
mapping = index = 0;
reserved = shared = slabs = buffers = inode = offset = 0;
pg_spec = phys_spec = print_hdr = FALSE;
switch (mi->flags)
{
case ADDRESS_SPECIFIED:
switch (mi->memtype)
{
case KVADDR:
if (is_page_ptr(mi->spec_addr, NULL))
pg_spec = TRUE;
else {
if (kvtop(NULL, mi->spec_addr, &phys, 0)) {
mi->spec_addr = phys;
phys_spec = TRUE;
}
else
return;
}
break;
case PHYSADDR:
phys_spec = TRUE;
break;
default:
error(FATAL, "dump_mem_map: no memtype specified\n");
break;
}
print_hdr = TRUE;
break;
case GET_ALL:
shared = 0;
reserved = 0;
buffers = 0;
slabs = 0;
break;
case GET_SHARED_PAGES:
shared = 0;
break;
case GET_TOTALRAM_PAGES:
reserved = 0;
break;
case GET_BUFFERS_PAGES:
buffers = 0;
break;
case GET_SLAB_PAGES:
slabs = 0;
break;
default:
print_hdr = TRUE;
break;
}
page_cache = GETBUF(SIZE(page) * PGMM_CACHED);
done = FALSE;
total_pages = 0;
bufferindex = 0;
for (n = 0; n < vt->numnodes; n++) {
if (print_hdr) {
if (!(pc->curcmd_flags & HEADER_PRINTED))
fprintf(fp, "%s%s", n ? "\n" : "", hdr);
print_hdr = FALSE;
pc->curcmd_flags |= HEADER_PRINTED;
}
nt = &vt->node_table[n];
total_pages += nt->size;
pp = nt->mem_map;
phys = nt->start_paddr;
if ((vt->flags & V_MEM_MAP) && (vt->numnodes == 1))
node_size = vt->max_mapnr;
else
node_size = nt->size;
for (i = 0; i < node_size;
i++, pp += SIZE(page), phys += PAGESIZE()) {
if ((i % PGMM_CACHED) == 0) {
ppend = pp + ((PGMM_CACHED-1) * SIZE(page));
physend = phys + ((PGMM_CACHED-1) * PAGESIZE());
if ((pg_spec && (mi->spec_addr > ppend)) ||
(phys_spec &&
(PHYSPAGEBASE(mi->spec_addr) > physend))) {
i += (PGMM_CACHED-1);
pp = ppend;
phys = physend;
continue;
}
fill_mem_map_cache(pp, ppend, page_cache);
}
pcache = page_cache + ((i%PGMM_CACHED) * SIZE(page));
if (received_SIGINT())
restart(0);
if ((pg_spec && (pp == mi->spec_addr)) ||
(phys_spec && (phys == PHYSPAGEBASE(mi->spec_addr))))
done = TRUE;
if (!done && (pg_spec || phys_spec))
continue;
flags = ULONG(pcache + OFFSET(page_flags));
if (SIZE(page_flags) == 4)
flags &= 0xffffffff;
count = UINT(pcache + OFFSET(page_count));
switch (mi->flags)
{
case GET_ALL:
case GET_BUFFERS_PAGES:
if (VALID_MEMBER(page_buffers)) {
tmp = ULONG(pcache +
OFFSET(page_buffers));
if (tmp)
buffers++;
} else if (THIS_KERNEL_VERSION >= LINUX(2,6,0)) {
if ((flags >> v26_PG_private) & 1)
buffers++;
} else
error(FATAL,
"cannot determine whether pages have buffers\n");
if (mi->flags != GET_ALL)
continue;
/* FALLTHROUGH */
case GET_SLAB_PAGES:
if (v22) {
if ((flags >> v22_PG_Slab) & 1)
slabs++;
} else if (vt->PG_slab) {
if ((flags >> vt->PG_slab) & 1)
slabs++;
} else {
if ((flags >> v24_PG_slab) & 1)
slabs++;
}
if (mi->flags != GET_ALL)
continue;
/* FALLTHROUGH */
case GET_SHARED_PAGES:
case GET_TOTALRAM_PAGES:
if (vt->PG_reserved)
PG_reserved_flag = vt->PG_reserved;
else
PG_reserved_flag = v22 ?
1 << v22_PG_reserved :
1 << v24_PG_reserved;
if (flags & PG_reserved_flag) {
reserved++;
} else {
if ((int)count >
(vt->flags & PGCNT_ADJ ? 0 : 1))
shared++;
}
continue;
}
page_mapping = VALID_MEMBER(page_mapping);
if (v22) {
inode = ULONG(pcache + OFFSET(page_inode));
offset = ULONG(pcache + OFFSET(page_offset));
} else if (page_mapping) {
mapping = ULONG(pcache +
OFFSET(page_mapping));
index = ULONG(pcache + OFFSET(page_index));
}
page_not_mapped = phys_not_mapped = FALSE;
if (v22) {
bufferindex += sprintf(outputbuffer+bufferindex,
(char *)&style1, pp, phys, inode,
offset, count);
} else {
if ((vt->flags & V_MEM_MAP)) {
if (!machdep->verify_paddr(phys))
phys_not_mapped = TRUE;
if (!kvtop(NULL, pp, NULL, 0))
page_not_mapped = TRUE;
}
if (page_not_mapped)
bufferindex += sprintf(outputbuffer+bufferindex,
(char *)&style2, pp, phys);
else if (!page_mapping)
bufferindex += sprintf(outputbuffer+bufferindex,
(char *)&style3, pp, phys, count);
else
bufferindex += sprintf(outputbuffer+bufferindex,
(char *)&style4, pp, phys,
mapping, index, count);
}
others = 0;
#define sprintflag(X) sprintf(outputbuffer + bufferindex, X, others++ ? "," : "")
if (v22) {
if ((flags >> v22_PG_DMA) & 1)
bufferindex += sprintflag("%sDMA");
if ((flags >> v22_PG_locked) & 1)
bufferindex += sprintflag("%slocked");
if ((flags >> v22_PG_error) & 1)
bufferindex += sprintflag("%serror");
if ((flags >> v22_PG_referenced) & 1)
bufferindex += sprintflag("%sreferenced");
if ((flags >> v22_PG_dirty) & 1)
bufferindex += sprintflag("%sdirty");
if ((flags >> v22_PG_uptodate) & 1)
bufferindex += sprintflag("%suptodate");
if ((flags >> v22_PG_free_after) & 1)
bufferindex += sprintflag("%sfree_after");
if ((flags >> v22_PG_decr_after) & 1)
bufferindex += sprintflag("%sdecr_after");
if ((flags >> v22_PG_swap_unlock_after) & 1)
bufferindex += sprintflag("%sswap_unlock_after");
if ((flags >> v22_PG_Slab) & 1)
bufferindex += sprintflag("%sslab");
if ((flags >> v22_PG_swap_cache) & 1)
bufferindex += sprintflag("%sswap_cache");
if ((flags >> v22_PG_skip) & 1)
bufferindex += sprintflag("%sskip");
if ((flags >> v22_PG_reserved) & 1)
bufferindex += sprintflag("%sreserved");
bufferindex += sprintf(outputbuffer+bufferindex, "\n");
} else if (THIS_KERNEL_VERSION > LINUX(2,4,9)) {
if (vt->flags & PAGEFLAGS)
bufferindex += translate_page_flags(outputbuffer+bufferindex, flags);
else
bufferindex += sprintf(outputbuffer+bufferindex, "%lx\n", flags);
} else {
if ((flags >> v24_PG_locked) & 1)
bufferindex += sprintflag("%slocked");
if ((flags >> v24_PG_error) & 1)
bufferindex += sprintflag("%serror");
if ((flags >> v24_PG_referenced) & 1)
bufferindex += sprintflag("%sreferenced");
if ((flags >> v24_PG_uptodate) & 1)
bufferindex += sprintflag("%suptodate");
if ((flags >> v24_PG_dirty) & 1)
bufferindex += sprintflag("%sdirty");
if ((flags >> v24_PG_decr_after) & 1)
bufferindex += sprintflag("%sdecr_after");
if ((flags >> v24_PG_active) & 1)
bufferindex += sprintflag("%sactive");
if ((flags >> v24_PG_inactive_dirty) & 1)
bufferindex += sprintflag("%sinactive_dirty");
if ((flags >> v24_PG_slab) & 1)
bufferindex += sprintflag("%sslab");
if ((flags >> v24_PG_swap_cache) & 1)
bufferindex += sprintflag("%sswap_cache");
if ((flags >> v24_PG_skip) & 1)
bufferindex += sprintflag("%sskip");
if ((flags >> v24_PG_inactive_clean) & 1)
bufferindex += sprintflag("%sinactive_clean");
if ((flags >> v24_PG_highmem) & 1)
bufferindex += sprintflag("%shighmem");
if ((flags >> v24_PG_checked) & 1)
bufferindex += sprintflag("%schecked");
if ((flags >> v24_PG_bigpage) & 1)
bufferindex += sprintflag("%sbigpage");
if ((flags >> v24_PG_arch_1) & 1)
bufferindex += sprintflag("%sarch_1");
if ((flags >> v24_PG_reserved) & 1)
bufferindex += sprintflag("%sreserved");
if (phys_not_mapped)
bufferindex += sprintflag("%s[NOT MAPPED]");
bufferindex += sprintf(outputbuffer+bufferindex, "\n");
}
if (bufferindex > buffersize) {
fprintf(fp, "%s", outputbuffer);
bufferindex = 0;
}
if (done)
break;
}
if (done)
break;
}
if (bufferindex > 0) {
fprintf(fp, "%s", outputbuffer);
}
switch (mi->flags)
{
case GET_TOTALRAM_PAGES:
mi->retval = total_pages - reserved;
break;
case GET_SHARED_PAGES:
mi->retval = shared;
break;
case GET_BUFFERS_PAGES:
mi->retval = buffers;
break;
case GET_SLAB_PAGES:
mi->retval = slabs;
break;
case GET_ALL:
mi->get_totalram = total_pages - reserved;
mi->get_shared = shared;
mi->get_buffers = buffers;
mi->get_slabs = slabs;
break;
case ADDRESS_SPECIFIED:
mi->retval = done;
break;
}
FREEBUF(outputbuffer);
FREEBUF(page_cache);
}
/*
* Stash a chunk of PGMM_CACHED page structures, starting at addr, into the
* passed-in buffer. The mem_map array is normally guaranteed to be
* readable except in the case of virtual mem_map usage. When V_MEM_MAP
* is in place, read all pages consumed by PGMM_CACHED page structures
* that are currently mapped, leaving the unmapped ones just zeroed out.
*/
static void
fill_mem_map_cache(ulong pp, ulong ppend, char *page_cache)
{
long size, cnt;
ulong addr;
char *bufptr;
/*
* Try to read it in one fell swoop.
*/
if (readmem(pp, KVADDR, page_cache, SIZE(page) * PGMM_CACHED,
"page struct cache", RETURN_ON_ERROR|QUIET))
return;
/*
* Break it into page-size-or-less requests, warning if it's
* not a virtual mem_map.
*/
size = SIZE(page) * PGMM_CACHED;
addr = pp;
bufptr = page_cache;
while (size > 0) {
/*
* Compute bytes till end of page.
*/
cnt = PAGESIZE() - PAGEOFFSET(addr);
if (cnt > size)
cnt = size;
if (!readmem(addr, KVADDR, bufptr, size,
"virtual page struct cache", RETURN_ON_ERROR|QUIET)) {
BZERO(bufptr, size);
if (!(vt->flags & V_MEM_MAP) && ((addr+size) < ppend))
error(WARNING,
"mem_map[] from %lx to %lx not accessible\n",
addr, addr+size);
}
addr += cnt;
bufptr += cnt;
size -= cnt;
}
}
static void
dump_hstates()
{
char *hstate;
int i, len, order;
long nr, free;
ulong vaddr;
char buf1[BUFSIZE];
char buf2[BUFSIZE];
if (!kernel_symbol_exists("hstates")) {
error(INFO, "hstates[] array does not exist\n");
option_not_supported('h');
}
if (INVALID_MEMBER(hstate_name)) {
STRUCT_SIZE_INIT(hstate, "hstate");
MEMBER_OFFSET_INIT(hstate_order, "hstate", "order");
MEMBER_OFFSET_INIT(hstate_nr_huge_pages, "hstate", "nr_huge_pages");
MEMBER_OFFSET_INIT(hstate_free_huge_pages, "hstate", "free_huge_pages");
MEMBER_OFFSET_INIT(hstate_name, "hstate", "name");
if (INVALID_SIZE(hstate) ||
INVALID_MEMBER(hstate_order) ||
INVALID_MEMBER(hstate_name) ||
INVALID_MEMBER(hstate_nr_huge_pages) ||
INVALID_MEMBER(hstate_free_huge_pages)) {
error(INFO, "hstate structure or members have changed\n");
option_not_supported('h');
}
}
fprintf(fp, "%s",
mkstring(buf1, VADDR_PRLEN, CENTER, "HSTATE"));
fprintf(fp, " SIZE FREE TOTAL NAME\n");
len = get_array_length("hstates", NULL, 0);
hstate = GETBUF(SIZE(hstate));
for (i = 0; i < len; i++) {
vaddr = symbol_value("hstates") + (SIZE(hstate) * i);
if (!readmem(vaddr, KVADDR, hstate,
SIZE(hstate), "hstate", RETURN_ON_ERROR))
break;
order = INT(hstate + OFFSET(hstate_order));
if (!order)
continue;
fprintf(fp, "%lx ", vaddr);
pages_to_size(1 << order, buf1);
shift_string_left(first_space(buf1), 1);
fprintf(fp, "%s ", mkstring(buf2, 5, RJUST, buf1));
free = LONG(hstate + OFFSET(hstate_free_huge_pages));
sprintf(buf1, "%ld", free);
fprintf(fp, "%s ", mkstring(buf2, 6, RJUST, buf1));
nr = LONG(hstate + OFFSET(hstate_nr_huge_pages));
sprintf(buf1, "%ld", nr);
fprintf(fp, "%s ", mkstring(buf2, 6, RJUST, buf1));
fprintf(fp, "%s\n", hstate + OFFSET(hstate_name));
}
FREEBUF(hstate);
}
static void
page_flags_init(void)
{
if (!page_flags_init_from_pageflag_names())
page_flags_init_from_pageflags_enum();
PG_reserved_flag_init();
PG_slab_flag_init();
}
static int
page_flags_init_from_pageflag_names(void)
{
int i, len;
char *buffer, *nameptr;
char namebuf[BUFSIZE];
ulong mask;
void *name;
MEMBER_OFFSET_INIT(trace_print_flags_mask, "trace_print_flags", "mask");
MEMBER_OFFSET_INIT(trace_print_flags_name, "trace_print_flags", "name");
STRUCT_SIZE_INIT(trace_print_flags, "trace_print_flags");
if (INVALID_SIZE(trace_print_flags) ||
INVALID_MEMBER(trace_print_flags_mask) ||
INVALID_MEMBER(trace_print_flags_name) ||
!kernel_symbol_exists("pageflag_names") ||
!(len = get_array_length("pageflag_names", NULL, 0)))
return FALSE;
buffer = GETBUF(SIZE(trace_print_flags) * len);
if (!readmem(symbol_value("pageflag_names"), KVADDR, buffer,
SIZE(trace_print_flags) * len, "pageflag_names array",
RETURN_ON_ERROR)) {
FREEBUF(buffer);
return FALSE;
}
if (!(vt->pageflags_data = (struct pageflags_data *)
malloc(sizeof(struct pageflags_data) * len))) {
error(INFO, "cannot malloc pageflags_data cache\n");
FREEBUF(buffer);
return FALSE;
}
if (CRASHDEBUG(1))
fprintf(fp, "pageflags from pageflag_names: \n");
for (i = 0; i < len; i++) {
mask = ULONG(buffer + (SIZE(trace_print_flags)*i) +
OFFSET(trace_print_flags_mask));
name = VOID_PTR(buffer + (SIZE(trace_print_flags)*i) +
OFFSET(trace_print_flags_name));
if ((mask == -1UL) && !name) { /* Linux 3.5 and earlier */
len--;
break;
}
if (!read_string((ulong)name, namebuf, BUFSIZE-1)) {
error(INFO, "failed to read pageflag_names entry\n",
i, name, mask);
goto pageflags_fail;
}
if (!(nameptr = (char *)malloc(strlen(namebuf)+1))) {
error(INFO, "cannot malloc pageflag_names space\n");
goto pageflags_fail;
}
strcpy(nameptr, namebuf);
vt->pageflags_data[i].name = nameptr;
vt->pageflags_data[i].mask = mask;
if (CRASHDEBUG(1)) {
fprintf(fp, " %08lx %s\n",
vt->pageflags_data[i].mask,
vt->pageflags_data[i].name);
}
}
FREEBUF(buffer);
vt->nr_pageflags = len;
vt->flags |= PAGEFLAGS;
return TRUE;
pageflags_fail:
FREEBUF(buffer);
free(vt->pageflags_data);
vt->pageflags_data = NULL;
return FALSE;
}
static int
page_flags_init_from_pageflags_enum(void)
{
int c;
int p, len;
char *nameptr;
char buf[BUFSIZE];
char *arglist[MAXARGS];
if (!(vt->pageflags_data = (struct pageflags_data *)
malloc(sizeof(struct pageflags_data) * 32))) {
error(INFO, "cannot malloc pageflags_data cache\n");
return FALSE;
}
p = 0;
pc->flags2 |= ALLOW_FP;
open_tmpfile();
if (dump_enumerator_list("pageflags")) {
rewind(pc->tmpfile);
while (fgets(buf, BUFSIZE, pc->tmpfile)) {
if (!strstr(buf, " = "))
continue;
c = parse_line(buf, arglist);
if (strstr(arglist[0], "__NR_PAGEFLAGS")) {
len = atoi(arglist[2]);
if (!len || (len > 32))
goto enum_fail;
vt->nr_pageflags = len;
break;
}
if (!(nameptr = (char *)malloc(strlen(arglist[0])))) {
error(INFO, "cannot malloc pageflags name space\n");
goto enum_fail;
}
strcpy(nameptr, arglist[0] + strlen("PG_"));
vt->pageflags_data[p].name = nameptr;
vt->pageflags_data[p].mask = 1 << atoi(arglist[2]);
p++;
}
} else
goto enum_fail;
close_tmpfile();
pc->flags2 &= ~ALLOW_FP;
if (CRASHDEBUG(1)) {
fprintf(fp, "pageflags from enum: \n");
for (p = 0; p < vt->nr_pageflags; p++)
fprintf(fp, " %08lx %s\n",
vt->pageflags_data[p].mask,
vt->pageflags_data[p].name);
}
vt->flags |= PAGEFLAGS;
return TRUE;
enum_fail:
close_tmpfile();
pc->flags2 &= ~ALLOW_FP;
for (c = 0; c < p; c++)
free(vt->pageflags_data[c].name);
free(vt->pageflags_data);
vt->pageflags_data = NULL;
vt->nr_pageflags = 0;
return FALSE;
}
static int
translate_page_flags(char *buffer, ulong flags)
{
char buf[BUFSIZE];
int i, others;
sprintf(buf, "%lx", flags);
if (flags) {
for (i = others = 0; i < vt->nr_pageflags; i++) {
if (flags & vt->pageflags_data[i].mask)
sprintf(&buf[strlen(buf)], "%s%s",
others++ ? "," : " ",
vt->pageflags_data[i].name);
}
}
strcat(buf, "\n");
strcpy(buffer, buf);
return(strlen(buf));
}
/*
* dump_page_hash_table() displays the entries in each page_hash_table.
*/
#define PGHASH_CACHED (1024)
static void
dump_page_hash_table(struct meminfo *hi)
{
int i;
int len, entry_len;
ulong page_hash_table, head;
struct list_data list_data, *ld;
struct gnu_request req;
long total_cached;
long page_cache_size;
ulong this_addr, searchpage;
int errflag, found, cnt, populated, verbose;
uint ival;
ulong buffer_pages;
char buf[BUFSIZE];
char hash_table[BUFSIZE];
char *pcache, *pghash_cache;
if (!vt->page_hash_table) {
if (hi->flags & VERBOSE)
option_not_supported('C');
if (symbol_exists("nr_pagecache")) {
buffer_pages = nr_blockdev_pages();
get_symbol_data("nr_pagecache", sizeof(int), &ival);
page_cache_size = (ulong)ival;
page_cache_size -= buffer_pages;
fprintf(fp, "page cache size: %ld\n", page_cache_size);
if (hi->flags & ADDRESS_SPECIFIED)
option_not_supported('c');
} else
option_not_supported('c');
return;
}
ld = &list_data;
if (hi->spec_addr && (hi->flags & ADDRESS_SPECIFIED)) {
verbose = TRUE;
searchpage = hi->spec_addr;
} else if (hi->flags & VERBOSE) {
verbose = TRUE;
searchpage = 0;
} else {
verbose = FALSE;
searchpage = 0;
}
if (vt->page_hash_table_len == 0)
error(FATAL, "cannot determine size of page_hash_table\n");
page_hash_table = vt->page_hash_table;
len = vt->page_hash_table_len;
entry_len = VALID_STRUCT(page_cache_bucket) ?
SIZE(page_cache_bucket) : sizeof(void *);
populated = 0;
if (CRASHDEBUG(1))
fprintf(fp, "page_hash_table length: %d\n", len);
get_symbol_type("page_cache_size", NULL, &req);
if (req.length == sizeof(int)) {
get_symbol_data("page_cache_size", sizeof(int), &ival);
page_cache_size = (long)ival;
} else
get_symbol_data("page_cache_size", sizeof(long),
&page_cache_size);
pghash_cache = GETBUF(sizeof(void *) * PGHASH_CACHED);
if (searchpage)
open_tmpfile();
hq_open();
for (i = total_cached = 0; i < len; i++,
page_hash_table += entry_len) {
if ((i % PGHASH_CACHED) == 0) {
readmem(page_hash_table, KVADDR, pghash_cache,
entry_len * PGHASH_CACHED,
"page hash cache", FAULT_ON_ERROR);
}
pcache = pghash_cache + ((i%PGHASH_CACHED) * entry_len);
if (VALID_STRUCT(page_cache_bucket))
pcache += OFFSET(page_cache_bucket_chain);
head = ULONG(pcache);
if (!head)
continue;
if (verbose)
fprintf(fp, "page_hash_table[%d]\n", i);
if (CRASHDEBUG(1))
populated++;
BZERO(ld, sizeof(struct list_data));
ld->flags = verbose;
ld->start = head;
ld->searchfor = searchpage;
ld->member_offset = OFFSET(page_next_hash);
cnt = do_list(ld);
total_cached += cnt;
if (ld->searchfor)
break;
if (received_SIGINT())
restart(0);
}
hq_close();
fprintf(fp, "%spage_cache_size: %ld ", verbose ? "\n" : "",
page_cache_size);
if (page_cache_size != total_cached)
fprintf(fp, "(found %ld)\n", total_cached);
else
fprintf(fp, "(verified)\n");
if (CRASHDEBUG(1))
fprintf(fp, "heads containing page(s): %d\n", populated);
if (searchpage) {
rewind(pc->tmpfile);
found = FALSE;
while (fgets(buf, BUFSIZE, pc->tmpfile)) {
if (CRASHDEBUG(1) && STRNEQ(buf, "<readmem:"))
continue;
if (strstr(buf, "page_hash_table")) {
strcpy(hash_table, buf);
continue;
}
if (strstr(buf, "page_cache_size"))
continue;
if (CRASHDEBUG(1) &&
!hexadecimal(strip_linefeeds(buf), 0))
continue;
this_addr = htol(strip_linefeeds(buf),
RETURN_ON_ERROR, &errflag);
if (this_addr == searchpage) {
found = TRUE;
break;
}
}
close_tmpfile();
if (found) {
fprintf(fp, "%s", hash_table);
fprintf(fp, "%lx\n", searchpage);
hi->retval = TRUE;
}
}
}
/*
* dump_free_pages() displays basic data about pages currently resident
* in the free_area[] memory lists. If the flags contains the VERBOSE
* bit, each page slab base address is dumped. If an address is specified
* only the free_area[] data containing that page is displayed, along with
* the page slab base address. Specified addresses can either be physical
* address or page structure pointers.
*/
char *free_area_hdr1 = \
"AREA SIZE FREE_AREA_STRUCT BLOCKS PAGES\n";
char *free_area_hdr2 = \
"AREA SIZE FREE_AREA_STRUCT\n";
static void
dump_free_pages(struct meminfo *fi)
{
int i;
int order;
ulong free_area;
char *free_area_buf;
ulong *pp;
int nr_mem_lists;
struct list_data list_data, *ld;
long cnt, total_free, chunk_size;
int nr_free_pages;
char buf[BUFSIZE];
char last_free[BUFSIZE];
char last_free_hdr[BUFSIZE];
int verbose, errflag, found;
physaddr_t searchphys;
ulong this_addr;
physaddr_t this_phys;
int do_search;
ulong kfp, offset;
int flen, dimension;
if (vt->flags & (NODES|ZONES))
error(FATAL, "dump_free_pages called with (NODES|ZONES)\n");
nr_mem_lists = ARRAY_LENGTH(free_area);
dimension = ARRAY_LENGTH(free_area_DIMENSION);
if (nr_mem_lists == 0)
error(FATAL, "cannot determine size/dimensions of free_area\n");
if (dimension)
error(FATAL,
"dump_free_pages called with multidimensional free area\n");
ld = &list_data;
total_free = 0;
searchphys = 0;
chunk_size = 0;
do_search = FALSE;
get_symbol_data("nr_free_pages", sizeof(int), &nr_free_pages);
switch (fi->flags)
{
case GET_FREE_HIGHMEM_PAGES:
error(FATAL, "GET_FREE_HIGHMEM_PAGES invalid in this kernel\n");
case GET_FREE_PAGES:
fi->retval = (ulong)nr_free_pages;
return;
case ADDRESS_SPECIFIED:
switch (fi->memtype)
{
case KVADDR:
if (!page_to_phys(fi->spec_addr, &searchphys)) {
if (!kvtop(NULL, fi->spec_addr, &searchphys, 0))
return;
}
break;
case PHYSADDR:
searchphys = fi->spec_addr;
break;
default:
error(FATAL, "dump_free_pages: no memtype specified\n");
}
do_search = TRUE;
break;
}
verbose = (do_search || (fi->flags & VERBOSE)) ? TRUE : FALSE;
free_area_buf = GETBUF(nr_mem_lists * SIZE(free_area_struct));
kfp = free_area = symbol_value("free_area");
flen = MAX(VADDR_PRLEN, strlen("FREE_AREA_STRUCT"));
readmem(free_area, KVADDR, free_area_buf,
SIZE(free_area_struct) * nr_mem_lists,
"free_area_struct", FAULT_ON_ERROR);
if (do_search)
open_tmpfile();
if (!verbose)
fprintf(fp, "%s", free_area_hdr1);
hq_open();
for (i = 0; i < nr_mem_lists; i++) {
pp = (ulong *)(free_area_buf + (SIZE(free_area_struct)*i));
chunk_size = power(2, i);
if (verbose)
fprintf(fp, "%s", free_area_hdr2);
fprintf(fp, "%3d ", i);
sprintf(buf, "%ldk", (chunk_size * PAGESIZE())/1024);
fprintf(fp, "%5s ", buf);
fprintf(fp, "%s %s",
mkstring(buf, flen, CENTER|LONG_HEX, MKSTR(kfp)),
verbose ? "\n" : "");
if (is_page_ptr(*pp, NULL)) {
BZERO(ld, sizeof(struct list_data));
ld->flags = verbose;
ld->start = *pp;
ld->end = free_area;
cnt = do_list(ld);
total_free += (cnt * chunk_size);
} else
cnt = 0;
if (!verbose)
fprintf(fp, "%6ld %6ld\n", cnt, cnt * chunk_size );
free_area += SIZE(free_area_struct);
kfp += SIZE(free_area_struct);
}
hq_close();
fprintf(fp, "\nnr_free_pages: %d ", nr_free_pages);
if (total_free != nr_free_pages)
fprintf(fp, "(found %ld)\n", total_free);
else
fprintf(fp, "(verified)\n");
if (!do_search)
return;
found = FALSE;
rewind(pc->tmpfile);
order = offset = this_addr = 0;
while (fgets(buf, BUFSIZE, pc->tmpfile)) {
if (CRASHDEBUG(1) && STRNEQ(buf, "<readmem"))
continue;
if (strstr(buf, "nr_free_pages") ||
STREQ(buf, "\n"))
continue;
if (strstr(buf, "AREA")) {
strcpy(last_free_hdr, buf);
continue;
}
if (strstr(buf, "k")) {
strcpy(last_free, buf);
chunk_size = power(2, order) * PAGESIZE();
order++;
continue;
}
if (CRASHDEBUG(1) && !hexadecimal(strip_linefeeds(buf), 0))
continue;
errflag = 0;
this_addr = htol(strip_linefeeds(buf),
RETURN_ON_ERROR, &errflag);
if (errflag)
continue;
if (!page_to_phys(this_addr, &this_phys))
continue;
if ((searchphys >= this_phys) &&
(searchphys < (this_phys+chunk_size))) {
if (searchphys > this_phys)
offset = (searchphys - this_phys)/PAGESIZE();
found = TRUE;
break;
}
}
close_tmpfile();
if (found) {
order--;
fprintf(fp, "%s", last_free_hdr);
fprintf(fp, "%s", last_free);
fprintf(fp, "%lx ", this_addr);
if (order) {
switch (fi->memtype)
{
case KVADDR:
fprintf(fp, "(%lx is ", (ulong)fi->spec_addr);
break;
case PHYSADDR:
fprintf(fp, "(%llx is %s", fi->spec_addr,
PAGEOFFSET(fi->spec_addr) ? "in " : "");
break;
}
fprintf(fp, "%s of %ld pages) ",
ordinal(offset+1, buf), power(2, order));
}
fi->retval = TRUE;
fprintf(fp, "\n");
}
}
/*
* Dump free pages on kernels with a multi-dimensional free_area array.
*/
char *free_area_hdr5 = \
" AREA SIZE FREE_AREA_STRUCT BLOCKS PAGES\n";
char *free_area_hdr6 = \
" AREA SIZE FREE_AREA_STRUCT\n";
static void
dump_multidimensional_free_pages(struct meminfo *fi)
{
int i, j;
struct list_data list_data, *ld;
long cnt, total_free;
ulong kfp, free_area;
physaddr_t searchphys;
int flen, errflag, verbose, nr_free_pages;
int nr_mem_lists, dimension, order, do_search;
ulong sum, found, offset;
char *free_area_buf, *p;
ulong *pp;
long chunk_size;
ulong this_addr;
physaddr_t this_phys;
char buf[BUFSIZE];
char last_area[BUFSIZE];
char last_area_hdr[BUFSIZE];
if (vt->flags & (NODES|ZONES))
error(FATAL,
"dump_multidimensional_free_pages called with (NODES|ZONES)\n");
ld = &list_data;
if (SIZE(free_area_struct) % sizeof(ulong))
error(FATAL, "free_area_struct not long-word aligned?\n");
total_free = 0;
searchphys = 0;
chunk_size = 0;
do_search = FALSE;
get_symbol_data("nr_free_pages", sizeof(int), &nr_free_pages);
switch (fi->flags)
{
case GET_FREE_HIGHMEM_PAGES:
error(FATAL, "GET_FREE_HIGHMEM_PAGES invalid in this kernel\n");
case GET_FREE_PAGES:
fi->retval = (ulong)nr_free_pages;
return;
case ADDRESS_SPECIFIED:
switch (fi->memtype)
{
case KVADDR:
if (!page_to_phys(fi->spec_addr, &searchphys)) {
if (!kvtop(NULL, fi->spec_addr, &searchphys, 0))
return;
}
break;
case PHYSADDR:
searchphys = fi->spec_addr;
break;
default:
error(FATAL,
"dump_multidimensional_free_pages: no memtype specified\n");
}
do_search = TRUE;
break;
}
verbose = (do_search || (fi->flags & VERBOSE)) ? TRUE : FALSE;
flen = MAX(VADDR_PRLEN, strlen("FREE_AREA_STRUCT"));
nr_mem_lists = ARRAY_LENGTH(free_area);
dimension = ARRAY_LENGTH(free_area_DIMENSION);
if (!nr_mem_lists || !dimension)
error(FATAL, "cannot determine free_area dimensions\n");
free_area_buf =
GETBUF((nr_mem_lists * SIZE(free_area_struct)) * dimension);
kfp = free_area = symbol_value("free_area");
readmem(free_area, KVADDR, free_area_buf,
(SIZE(free_area_struct) * nr_mem_lists) * dimension,
"free_area arrays", FAULT_ON_ERROR);
if (do_search)
open_tmpfile();
hq_open();
for (i = sum = found = 0; i < dimension; i++) {
if (!verbose)
fprintf(fp, "%s", free_area_hdr5);
pp = (ulong *)(free_area_buf +
((SIZE(free_area_struct)*nr_mem_lists)*i));
for (j = 0; j < nr_mem_lists; j++) {
if (verbose)
fprintf(fp, "%s", free_area_hdr6);
sprintf(buf, "[%d][%d]", i, j);
fprintf(fp, "%7s ", buf);
chunk_size = power(2, j);
sprintf(buf, "%ldk", (chunk_size * PAGESIZE())/1024);
fprintf(fp, "%5s ", buf);
fprintf(fp, "%s %s",
mkstring(buf, flen, CENTER|LONG_HEX, MKSTR(kfp)),
verbose ? "\n" : "");
if (is_page_ptr(*pp, NULL)) {
BZERO(ld, sizeof(struct list_data));
ld->flags = verbose;
ld->start = *pp;
ld->end = free_area;
cnt = do_list(ld);
total_free += (cnt * chunk_size);
} else
cnt = 0;
if (!verbose)
fprintf(fp,
"%6ld %6ld\n", cnt, cnt * chunk_size );
pp += (SIZE(free_area_struct)/sizeof(ulong));
free_area += SIZE(free_area_struct);
kfp += SIZE(free_area_struct);
}
fprintf(fp, "\n");
}
hq_close();
fprintf(fp, "nr_free_pages: %d ", nr_free_pages);
if (total_free != nr_free_pages)
fprintf(fp, "(found %ld)\n", total_free);
else
fprintf(fp, "(verified)\n");
if (!do_search)
return;
found = FALSE;
rewind(pc->tmpfile);
order = offset = this_addr = 0;
while (fgets(buf, BUFSIZE, pc->tmpfile)) {
if (CRASHDEBUG(1) && STRNEQ(buf, "<readmem:"))
continue;
if (STRNEQ(buf, "nr_free_pages:"))
continue;
if (strstr(buf, "AREA")) {
strcpy(last_area_hdr, buf);
p = fgets(buf, BUFSIZE, pc->tmpfile);
strcpy(last_area, strip_linefeeds(buf));
p = strstr(buf, "k");
*p = NULLCHAR;
while (*p != ' ')
p--;
chunk_size = atol(p+1) * 1024;
if (chunk_size == PAGESIZE())
order = 0;
else
order++;
continue;
}
errflag = 0;
this_addr = htol(strip_linefeeds(buf),
RETURN_ON_ERROR, &errflag);
if (errflag)
continue;
if (!page_to_phys(this_addr, &this_phys))
continue;
if ((searchphys >= this_phys) &&
(searchphys < (this_phys+chunk_size))) {
if (searchphys > this_phys)
offset = (searchphys - this_phys)/PAGESIZE();
found = TRUE;
break;
}
}
close_tmpfile();
if (found) {
fprintf(fp, "%s", last_area_hdr);
fprintf(fp, "%s\n", last_area);
fprintf(fp, "%lx ", this_addr);
if (order) {
switch (fi->memtype)
{
case KVADDR:
fprintf(fp, "(%lx is ", (ulong)fi->spec_addr);
break;
case PHYSADDR:
fprintf(fp, "(%llx is %s", fi->spec_addr,
PAGEOFFSET(fi->spec_addr) ? "in " : "");
break;
}
fprintf(fp, "%s of %ld pages) ",
ordinal(offset+1, buf), power(2, order));
}
fi->retval = TRUE;
fprintf(fp, "\n");
}
}
/*
* Dump free pages in newer kernels that have zones. This is a work in
* progress, because although the framework for memory nodes has been laid
* down, complete support has not been put in place.
*/
static char *zone_hdr = "ZONE NAME SIZE FREE";
static void
dump_free_pages_zones_v1(struct meminfo *fi)
{
int i, n;
ulong node_zones;
ulong size;
long zone_size_offset;
long chunk_size;
int order, errflag, do_search;
ulong offset, verbose, value, sum, found;
ulong this_addr;
physaddr_t this_phys, searchphys;
ulong zone_mem_map;
ulong zone_start_paddr;
ulong zone_start_mapnr;
struct node_table *nt;
char buf[BUFSIZE], *p;
char buf1[BUFSIZE];
char buf2[BUFSIZE];
char buf3[BUFSIZE];
char last_node[BUFSIZE];
char last_zone[BUFSIZE];
char last_area[BUFSIZE];
char last_area_hdr[BUFSIZE];
if (!(vt->flags & (NODES|ZONES)))
error(FATAL,
"dump_free_pages_zones_v1 called without (NODES|ZONES)\n");
if (fi->flags & ADDRESS_SPECIFIED) {
switch (fi->memtype)
{
case KVADDR:
if (!page_to_phys(fi->spec_addr, &searchphys)) {
if (!kvtop(NULL, fi->spec_addr, &searchphys, 0))
return;
}
break;
case PHYSADDR:
searchphys = fi->spec_addr;
break;
default:
error(FATAL,
"dump_free_pages_zones_v1: no memtype specified\n");
}
do_search = TRUE;
} else {
searchphys = 0;
do_search = FALSE;
}
verbose = (do_search || (fi->flags & VERBOSE)) ? TRUE : FALSE;
chunk_size = 0;
zone_size_offset = 0;
if (VALID_MEMBER(zone_struct_size))
zone_size_offset = OFFSET(zone_struct_size);
else if (VALID_MEMBER(zone_struct_memsize))
zone_size_offset = OFFSET(zone_struct_memsize);
else
error(FATAL,
"zone_struct has neither size nor memsize field\n");
if (do_search)
open_tmpfile();
hq_open();
for (n = sum = found = 0; n < vt->numnodes; n++) {
nt = &vt->node_table[n];
node_zones = nt->pgdat + OFFSET(pglist_data_node_zones);
for (i = 0; i < vt->nr_zones; i++) {
if (fi->flags == GET_FREE_PAGES) {
readmem(node_zones+
OFFSET(zone_struct_free_pages),
KVADDR, &value, sizeof(ulong),
"node_zones free_pages",
FAULT_ON_ERROR);
sum += value;
node_zones += SIZE(zone_struct);
continue;
}
if (fi->flags == GET_FREE_HIGHMEM_PAGES) {
if (i == vt->ZONE_HIGHMEM) {
readmem(node_zones+
OFFSET(zone_struct_free_pages),
KVADDR, &value, sizeof(ulong),
"node_zones free_pages",
FAULT_ON_ERROR);
sum += value;
}
node_zones += SIZE(zone_struct);
continue;
}
if (fi->flags == GET_ZONE_SIZES) {
readmem(node_zones+zone_size_offset,
KVADDR, &size, sizeof(ulong),
"node_zones {mem}size", FAULT_ON_ERROR);
sum += size;
node_zones += SIZE(zone_struct);
continue;
}
if ((i == 0) && (vt->flags & NODES)) {
if (n) {
fprintf(fp, "\n");
pad_line(fp,
VADDR_PRLEN > 8 ? 74 : 66, '-');
fprintf(fp, "\n");
}
fprintf(fp, "%sNODE\n %2d\n",
n ? "\n" : "", nt->node_id);
}
fprintf(fp, "%s%s %s START_PADDR START_MAPNR\n",
i > 0 ? "\n" : "",
zone_hdr,
mkstring(buf1, VADDR_PRLEN, CENTER|LJUST,
"MEM_MAP"));
fprintf(fp, "%3d ", i);
readmem(node_zones+OFFSET(zone_struct_name), KVADDR,
&value, sizeof(void *),
"node_zones name", FAULT_ON_ERROR);
if (read_string(value, buf, BUFSIZE-1))
fprintf(fp, "%-9s ", buf);
else
fprintf(fp, "(unknown) ");
readmem(node_zones+zone_size_offset, KVADDR,
&size, sizeof(ulong),
"node_zones {mem}size", FAULT_ON_ERROR);
fprintf(fp, "%6ld ", size);
readmem(node_zones+OFFSET(zone_struct_free_pages),
KVADDR, &value, sizeof(ulong),
"node_zones free_pages", FAULT_ON_ERROR);
fprintf(fp, "%6ld ", value);
readmem(node_zones+OFFSET(zone_struct_zone_start_paddr),
KVADDR, &zone_start_paddr, sizeof(ulong),
"node_zones zone_start_paddr", FAULT_ON_ERROR);
readmem(node_zones+OFFSET(zone_struct_zone_start_mapnr),
KVADDR, &zone_start_mapnr, sizeof(ulong),
"node_zones zone_start_mapnr", FAULT_ON_ERROR);
readmem(node_zones+OFFSET(zone_struct_zone_mem_map),
KVADDR, &zone_mem_map, sizeof(ulong),
"node_zones zone_mem_map", FAULT_ON_ERROR);
fprintf(fp, "%s %s %s\n",
mkstring(buf1, VADDR_PRLEN,
CENTER|LONG_HEX,MKSTR(zone_mem_map)),
mkstring(buf2, strlen("START_PADDR"),
CENTER|LONG_HEX|RJUST,
MKSTR(zone_start_paddr)),
mkstring(buf3, strlen("START_MAPNR"),
CENTER|LONG_DEC|RJUST,
MKSTR(zone_start_mapnr)));
sum += value;
if (value)
found += dump_zone_free_area(node_zones+
OFFSET(zone_struct_free_area),
vt->nr_free_areas, verbose, NULL);
node_zones += SIZE(zone_struct);
}
}
hq_close();
if (fi->flags & (GET_FREE_PAGES|GET_ZONE_SIZES|GET_FREE_HIGHMEM_PAGES)) {
fi->retval = sum;
return;
}
fprintf(fp, "\nnr_free_pages: %ld ", sum);
if (sum == found)
fprintf(fp, "(verified)\n");
else
fprintf(fp, "(found %ld)\n", found);
if (!do_search)
return;
found = FALSE;
rewind(pc->tmpfile);
order = offset = this_addr = 0;
last_node[0] = NULLCHAR;
last_zone[0] = NULLCHAR;
last_area[0] = NULLCHAR;
last_area_hdr[0] = NULLCHAR;
while (fgets(buf, BUFSIZE, pc->tmpfile)) {
if (CRASHDEBUG(1) && STRNEQ(buf, "<readmem"))
continue;
if (STRNEQ(buf, "nr_free_pages:"))
continue;
if (STRNEQ(buf, "NODE")) {
p = fgets(buf, BUFSIZE, pc->tmpfile);
strcpy(last_node, strip_linefeeds(buf));
continue;
}
if (STRNEQ(buf, "ZONE")) {
p = fgets(buf, BUFSIZE, pc->tmpfile);
strcpy(last_zone, strip_linefeeds(buf));
continue;
}
if (STRNEQ(buf, "AREA")) {
strcpy(last_area_hdr, buf);
p = fgets(buf, BUFSIZE, pc->tmpfile);
strcpy(last_area, strip_linefeeds(buf));
p = strstr(buf, "k");
*p = NULLCHAR;
while (*p != ' ')
p--;
chunk_size = atol(p+1) * 1024;
if (chunk_size == PAGESIZE())
order = 0;
else
order++;
continue;
}
if (CRASHDEBUG(0) &&
!hexadecimal(strip_linefeeds(buf), 0))
continue;
errflag = 0;
this_addr = htol(strip_linefeeds(buf),
RETURN_ON_ERROR, &errflag);
if (errflag)
continue;
if (!page_to_phys(this_addr, &this_phys))
continue;
if ((searchphys >= this_phys) &&
(searchphys < (this_phys+chunk_size))) {
if (searchphys > this_phys)
offset = (searchphys - this_phys)/PAGESIZE();
found = TRUE;
break;
}
}
close_tmpfile();
if (found) {
if (strlen(last_node))
fprintf(fp, "NODE\n%s\n", last_node);
fprintf(fp, "%s %s START_PADDR START_MAPNR\n",
zone_hdr,
mkstring(buf1, VADDR_PRLEN, CENTER|LJUST, "MEM_MAP"));
fprintf(fp, "%s\n", last_zone);
fprintf(fp, "%s", last_area_hdr);
fprintf(fp, "%s\n", last_area);
fprintf(fp, "%lx ", this_addr);
if (order) {
switch (fi->memtype)
{
case KVADDR:
fprintf(fp, "(%lx is ", (ulong)fi->spec_addr);
break;
case PHYSADDR:
fprintf(fp, "(%llx is %s", fi->spec_addr,
PAGEOFFSET(fi->spec_addr) ? "in " : "");
break;
}
fprintf(fp, "%s of %ld pages) ",
ordinal(offset+1, buf), power(2, order));
}
fi->retval = TRUE;
fprintf(fp, "\n");
}
}
/*
* Callback function for free-list search for a specific page.
*/
struct free_page_callback_data {
physaddr_t searchphys;
long block_size;
ulong page;
int found;
};
static int
free_page_callback(void *page, void *arg)
{
struct free_page_callback_data *cbd = arg;
physaddr_t this_phys;
if (!page_to_phys((ulong)page, &this_phys))
return FALSE;
if ((cbd->searchphys >= this_phys) &&
(cbd->searchphys < (this_phys + cbd->block_size))) {
cbd->page = (ulong)page;
cbd->found = TRUE;
return TRUE;
}
return FALSE;
}
/*
* Same as dump_free_pages_zones_v1(), but updated for numerous 2.6 zone
* and free_area related data structure changes.
*/
static void
dump_free_pages_zones_v2(struct meminfo *fi)
{
int i, n;
ulong node_zones;
ulong size;
long zone_size_offset;
long chunk_size;
int order, errflag, do_search;
ulong offset, verbose, value, sum, found;
ulong this_addr;
physaddr_t phys, this_phys, searchphys, end_paddr;
struct free_page_callback_data callback_data;
ulong pp;
ulong zone_mem_map;
ulong zone_start_paddr;
ulong zone_start_pfn;
ulong zone_start_mapnr;
struct node_table *nt;
char buf[BUFSIZE], *p;
char buf1[BUFSIZE];
char buf2[BUFSIZE];
char buf3[BUFSIZE];
char last_node[BUFSIZE];
char last_zone[BUFSIZE];
char last_area[BUFSIZE];
char last_area_hdr[BUFSIZE];
if (!(vt->flags & (NODES|ZONES)))
error(FATAL,
"dump_free_pages_zones_v2 called without (NODES|ZONES)\n");
if (fi->flags & ADDRESS_SPECIFIED) {
switch (fi->memtype)
{
case KVADDR:
if (!page_to_phys(fi->spec_addr, &searchphys)) {
if (!kvtop(NULL, fi->spec_addr, &searchphys, 0))
return;
}
break;
case PHYSADDR:
searchphys = fi->spec_addr;
break;
default:
error(FATAL,
"dump_free_pages_zones_v2: no memtype specified\n");
}
do_search = TRUE;
callback_data.searchphys = searchphys;
callback_data.found = FALSE;
} else {
searchphys = 0;
do_search = FALSE;
}
verbose = (do_search || (fi->flags & VERBOSE)) ? TRUE : FALSE;
zone_size_offset = 0;
chunk_size = 0;
this_addr = 0;
if (VALID_MEMBER(zone_spanned_pages))
zone_size_offset = OFFSET(zone_spanned_pages);
else
error(FATAL, "zone struct has no spanned_pages field\n");
if (do_search)
open_tmpfile();
hq_open();
for (n = sum = found = 0; n < vt->numnodes; n++) {
nt = &vt->node_table[n];
node_zones = nt->pgdat + OFFSET(pglist_data_node_zones);
for (i = 0; i < vt->nr_zones; i++) {
if (fi->flags == GET_FREE_PAGES) {
readmem(node_zones+
OFFSET(zone_free_pages),
KVADDR, &value, sizeof(ulong),
"node_zones free_pages",
FAULT_ON_ERROR);
sum += value;
node_zones += SIZE(zone);
continue;
}
if (fi->flags == GET_FREE_HIGHMEM_PAGES) {
readmem(node_zones+OFFSET(zone_name), KVADDR,
&value, sizeof(void *),
"node_zones name", FAULT_ON_ERROR);
if (read_string(value, buf, BUFSIZE-1) &&
STREQ(buf, "HighMem"))
vt->ZONE_HIGHMEM = i;
if (i == vt->ZONE_HIGHMEM) {
readmem(node_zones+
OFFSET(zone_free_pages),
KVADDR, &value, sizeof(ulong),
"node_zones free_pages",
FAULT_ON_ERROR);
sum += value;
}
node_zones += SIZE(zone);
continue;
}
if (fi->flags == GET_ZONE_SIZES) {
readmem(node_zones+zone_size_offset,
KVADDR, &size, sizeof(ulong),
"node_zones size", FAULT_ON_ERROR);
sum += size;
node_zones += SIZE(zone);
continue;
}
if ((i == 0) && ((vt->flags & NODES) || (vt->numnodes > 1))) {
if (n) {
fprintf(fp, "\n");
pad_line(fp,
VADDR_PRLEN > 8 ? 74 : 66, '-');
fprintf(fp, "\n");
}
fprintf(fp, "%sNODE\n %2d\n",
n ? "\n" : "", nt->node_id);
}
fprintf(fp, "%s%s %s START_PADDR START_MAPNR\n",
i > 0 ? "\n" : "",
zone_hdr,
mkstring(buf1, VADDR_PRLEN, CENTER|LJUST,
"MEM_MAP"));
fprintf(fp, "%3d ", i);
readmem(node_zones+OFFSET(zone_name), KVADDR,
&value, sizeof(void *),
"node_zones name", FAULT_ON_ERROR);
if (read_string(value, buf, BUFSIZE-1))
fprintf(fp, "%-9s ", buf);
else
fprintf(fp, "(unknown) ");
readmem(node_zones+zone_size_offset, KVADDR,
&size, sizeof(ulong),
"node_zones size", FAULT_ON_ERROR);
fprintf(fp, "%6ld ", size);
readmem(node_zones+OFFSET(zone_free_pages),
KVADDR, &value, sizeof(ulong),
"node_zones free_pages", FAULT_ON_ERROR);
fprintf(fp, "%6ld ", value);
if (VALID_MEMBER(zone_zone_mem_map)) {
readmem(node_zones+OFFSET(zone_zone_mem_map),
KVADDR, &zone_mem_map, sizeof(ulong),
"node_zones zone_mem_map", FAULT_ON_ERROR);
}
readmem(node_zones+ OFFSET(zone_zone_start_pfn),
KVADDR, &zone_start_pfn, sizeof(ulong),
"node_zones zone_start_pfn", FAULT_ON_ERROR);
zone_start_paddr = PTOB(zone_start_pfn);
if (!VALID_MEMBER(zone_zone_mem_map)) {
if (IS_SPARSEMEM() || IS_DISCONTIGMEM()) {
zone_mem_map = 0;
if (size) {
phys = PTOB(zone_start_pfn);
if (phys_to_page(phys, &pp))
zone_mem_map = pp;
}
} else if (vt->flags & FLATMEM) {
zone_mem_map = 0;
if (size)
zone_mem_map = nt->mem_map +
(zone_start_pfn * SIZE(page));
} else
error(FATAL, "\ncannot determine zone mem_map: TBD\n");
}
if (zone_mem_map)
zone_start_mapnr =
(zone_mem_map - nt->mem_map) /
SIZE(page);
else
zone_start_mapnr = 0;
fprintf(fp, "%s %s %s\n",
mkstring(buf1, VADDR_PRLEN,
CENTER|LONG_HEX,MKSTR(zone_mem_map)),
mkstring(buf2, strlen("START_PADDR"),
CENTER|LONG_HEX|RJUST,
MKSTR(zone_start_paddr)),
mkstring(buf3, strlen("START_MAPNR"),
CENTER|LONG_DEC|RJUST,
MKSTR(zone_start_mapnr)));
sum += value;
if (value) {
if (do_search) {
end_paddr = nt->start_paddr +
((physaddr_t)nt->size *
(physaddr_t)PAGESIZE());
if ((searchphys >= nt->start_paddr) &&
(searchphys < end_paddr))
found += dump_zone_free_area(node_zones+
OFFSET(zone_free_area),
vt->nr_free_areas, verbose,
&callback_data);
if (callback_data.found)
goto done_search;
} else
found += dump_zone_free_area(node_zones+
OFFSET(zone_free_area),
vt->nr_free_areas, verbose, NULL);
}
node_zones += SIZE(zone);
}
}
done_search:
hq_close();
if (fi->flags & (GET_FREE_PAGES|GET_ZONE_SIZES|GET_FREE_HIGHMEM_PAGES)) {
fi->retval = sum;
return;
}
fprintf(fp, "\nnr_free_pages: %ld ", sum);
if (sum == found)
fprintf(fp, "(verified)\n");
else
fprintf(fp, "(found %ld)\n", found);
if (!do_search)
return;
found = FALSE;
rewind(pc->tmpfile);
order = offset = 0;
last_node[0] = NULLCHAR;
last_zone[0] = NULLCHAR;
last_area[0] = NULLCHAR;
last_area_hdr[0] = NULLCHAR;
while (fgets(buf, BUFSIZE, pc->tmpfile)) {
if (CRASHDEBUG(1) && STRNEQ(buf, "<readmem"))
continue;
if (STRNEQ(buf, "nr_free_pages:"))
continue;
if (STRNEQ(buf, "NODE")) {
p = fgets(buf, BUFSIZE, pc->tmpfile);
strcpy(last_node, strip_linefeeds(buf));
continue;
}
if (STRNEQ(buf, "ZONE")) {
p = fgets(buf, BUFSIZE, pc->tmpfile);
strcpy(last_zone, strip_linefeeds(buf));
continue;
}
if (STRNEQ(buf, "AREA")) {
strcpy(last_area_hdr, buf);
p = fgets(buf, BUFSIZE, pc->tmpfile);
strcpy(last_area, strip_linefeeds(buf));
p = strstr(buf, "k");
*p = NULLCHAR;
while (*p != ' ')
p--;
chunk_size = atol(p+1) * 1024;
if (chunk_size == PAGESIZE())
order = 0;
else
order++;
continue;
}
if (CRASHDEBUG(0) &&
!hexadecimal(strip_linefeeds(buf), 0))
continue;
errflag = 0;
this_addr = htol(strip_linefeeds(buf),
RETURN_ON_ERROR, &errflag);
if (errflag)
continue;
if (!page_to_phys(this_addr, &this_phys))
continue;
if ((searchphys >= this_phys) &&
(searchphys < (this_phys+chunk_size))) {
if (searchphys > this_phys)
offset = (searchphys - this_phys)/PAGESIZE();
found = TRUE;
break;
}
}
close_tmpfile();
if (found) {
if (strlen(last_node))
fprintf(fp, "NODE\n%s\n", last_node);
fprintf(fp, "%s %s START_PADDR START_MAPNR\n",
zone_hdr,
mkstring(buf1, VADDR_PRLEN, CENTER|LJUST, "MEM_MAP"));
fprintf(fp, "%s\n", last_zone);
fprintf(fp, "%s", last_area_hdr);
fprintf(fp, "%s\n", last_area);
fprintf(fp, "%lx ", this_addr);
if (order) {
switch (fi->memtype)
{
case KVADDR:
fprintf(fp, "(%lx is ", (ulong)fi->spec_addr);
break;
case PHYSADDR:
fprintf(fp, "(%llx is %s", fi->spec_addr,
PAGEOFFSET(fi->spec_addr) ? "in " : "");
break;
}
fprintf(fp, "%s of %ld pages)",
ordinal(offset+1, buf), chunk_size/PAGESIZE());
}
fi->retval = TRUE;
fprintf(fp, "\n");
}
}
static char *
page_usage_hdr = "ZONE NAME FREE ACTIVE INACTIVE_DIRTY INACTIVE_CLEAN MIN/LOW/HIGH";
/*
* Display info about the non-free pages in each zone.
*/
static int
dump_zone_page_usage(void)
{
int i, n;
ulong value, node_zones;
struct node_table *nt;
ulong inactive_dirty_pages, inactive_clean_pages, active_pages;
ulong free_pages, pages_min, pages_low, pages_high;
char namebuf[BUFSIZE];
char buf1[BUFSIZE];
char buf2[BUFSIZE];
char buf3[BUFSIZE];
if (!VALID_MEMBER(zone_struct_inactive_dirty_pages) ||
!VALID_MEMBER(zone_struct_inactive_clean_pages) ||
!VALID_MEMBER(zone_struct_active_pages) ||
!VALID_MEMBER(zone_struct_pages_min) ||
!VALID_MEMBER(zone_struct_pages_low) ||
!VALID_MEMBER(zone_struct_pages_high))
return FALSE;
fprintf(fp, "\n");
for (n = 0; n < vt->numnodes; n++) {
nt = &vt->node_table[n];
node_zones = nt->pgdat + OFFSET(pglist_data_node_zones);
if ((vt->numnodes > 1) && (vt->flags & NODES)) {
fprintf(fp, "%sNODE\n %2d\n",
n ? "\n" : "", nt->node_id);
}
fprintf(fp, "%s\n", page_usage_hdr);
for (i = 0; i < vt->nr_zones; i++) {
readmem(node_zones+OFFSET(zone_struct_free_pages),
KVADDR, &free_pages, sizeof(ulong),
"node_zones free_pages", FAULT_ON_ERROR);
readmem(node_zones+
OFFSET(zone_struct_inactive_dirty_pages),
KVADDR, &inactive_dirty_pages, sizeof(ulong),
"node_zones inactive_dirty_pages",
FAULT_ON_ERROR);
readmem(node_zones+
OFFSET(zone_struct_inactive_clean_pages),
KVADDR, &inactive_clean_pages, sizeof(ulong),
"node_zones inactive_clean_pages",
FAULT_ON_ERROR);
readmem(node_zones+OFFSET(zone_struct_active_pages),
KVADDR, &active_pages, sizeof(ulong),
"node_zones active_pages", FAULT_ON_ERROR);
readmem(node_zones+OFFSET(zone_struct_pages_min),
KVADDR, &pages_min, sizeof(ulong),
"node_zones pages_min", FAULT_ON_ERROR);
readmem(node_zones+OFFSET(zone_struct_pages_low),
KVADDR, &pages_low, sizeof(ulong),
"node_zones pages_low", FAULT_ON_ERROR);
readmem(node_zones+OFFSET(zone_struct_pages_high),
KVADDR, &pages_high, sizeof(ulong),
"node_zones pages_high", FAULT_ON_ERROR);
readmem(node_zones+OFFSET(zone_struct_name), KVADDR,
&value, sizeof(void *),
"node_zones name", FAULT_ON_ERROR);
if (read_string(value, buf1, BUFSIZE-1))
sprintf(namebuf, "%-8s", buf1);
else
sprintf(namebuf, "(unknown)");
sprintf(buf2, "%ld/%ld/%ld",
pages_min, pages_low, pages_high);
fprintf(fp, "%3d %s %7ld %7ld %15ld %15ld %s\n",
i,
namebuf,
free_pages,
active_pages,
inactive_dirty_pages,
inactive_clean_pages,
mkstring(buf3, strlen("MIN/LOW/HIGH"),
CENTER, buf2));
node_zones += SIZE(zone_struct);
}
}
return TRUE;
}
/*
* Dump the num "order" contents of the zone_t free_area array.
*/
char *free_area_hdr3 = "AREA SIZE FREE_AREA_STRUCT\n";
char *free_area_hdr4 = "AREA SIZE FREE_AREA_STRUCT BLOCKS PAGES\n";
static int
dump_zone_free_area(ulong free_area, int num, ulong verbose,
struct free_page_callback_data *callback_data)
{
int i, j;
long chunk_size;
int flen, total_free, cnt;
char buf[BUFSIZE];
ulong free_area_buf[3];
char *free_area_buf2;
char *free_list_buf;
ulong free_list;
struct list_data list_data, *ld;
int list_count;
ulong *free_ptr;
list_count = 0;
free_list_buf = free_area_buf2 = NULL;
if (VALID_STRUCT(free_area_struct)) {
if (SIZE(free_area_struct) != (3 * sizeof(ulong)))
error(FATAL,
"unrecognized free_area_struct size: %ld\n",
SIZE(free_area_struct));
list_count = 1;
} else if (VALID_STRUCT(free_area)) {
if (SIZE(free_area) == (3 * sizeof(ulong)))
list_count = 1;
else {
list_count = MEMBER_SIZE("free_area",
"free_list")/SIZE(list_head);
free_area_buf2 = GETBUF(SIZE(free_area));
free_list_buf = GETBUF(SIZE(list_head));
readmem(free_area, KVADDR, free_area_buf2,
SIZE(free_area), "free_area struct",
FAULT_ON_ERROR);
}
} else error(FATAL,
"neither free_area_struct or free_area structures exist\n");
ld = &list_data;
if (!verbose)
fprintf(fp, "%s", free_area_hdr4);
total_free = 0;
flen = MAX(VADDR_PRLEN, strlen("FREE_AREA_STRUCT"));
if (list_count > 1)
goto multiple_lists;
for (i = 0; i < num; i++,
free_area += SIZE_OPTION(free_area_struct, free_area)) {
if (verbose)
fprintf(fp, "%s", free_area_hdr3);
fprintf(fp, "%3d ", i);
chunk_size = power(2, i);
sprintf(buf, "%ldk", (chunk_size * PAGESIZE())/1024);
fprintf(fp, " %7s ", buf);
readmem(free_area, KVADDR, free_area_buf,
sizeof(ulong) * 3, "free_area_struct", FAULT_ON_ERROR);
fprintf(fp, "%s ",
mkstring(buf, flen, CENTER|LONG_HEX, MKSTR(free_area)));
if (free_area_buf[0] == free_area) {
if (verbose)
fprintf(fp, "\n");
else
fprintf(fp, "%6d %6d\n", 0, 0);
continue;
}
if (verbose)
fprintf(fp, "\n");
BZERO(ld, sizeof(struct list_data));
ld->flags = verbose | RETURN_ON_DUPLICATE;
ld->start = free_area_buf[0];
ld->end = free_area;
if (VALID_MEMBER(page_list_next))
ld->list_head_offset = OFFSET(page_list);
else if (VALID_MEMBER(page_lru))
ld->list_head_offset = OFFSET(page_lru)+
OFFSET(list_head_next);
else error(FATAL,
"neither page.list or page.lru exist?\n");
cnt = do_list(ld);
if (cnt < 0) {
error(pc->curcmd_flags & IGNORE_ERRORS ? INFO : FATAL,
"corrupted free list from free_area_struct: %lx\n",
free_area);
if (pc->curcmd_flags & IGNORE_ERRORS)
break;
}
if (!verbose)
fprintf(fp, "%6d %6ld\n", cnt, cnt*chunk_size);
total_free += (cnt * chunk_size);
}
return total_free;
multiple_lists:
for (i = 0; i < num; i++,
free_area += SIZE_OPTION(free_area_struct, free_area)) {
readmem(free_area, KVADDR, free_area_buf2,
SIZE(free_area), "free_area struct", FAULT_ON_ERROR);
for (j = 0, free_list = free_area; j < list_count;
j++, free_list += SIZE(list_head)) {
if (verbose)
fprintf(fp, "%s", free_area_hdr3);
fprintf(fp, "%3d ", i);
chunk_size = power(2, i);
sprintf(buf, "%ldk", (chunk_size * PAGESIZE())/1024);
fprintf(fp, " %7s ", buf);
readmem(free_list, KVADDR, free_list_buf,
SIZE(list_head), "free_area free_list",
FAULT_ON_ERROR);
fprintf(fp, "%s ",
mkstring(buf, flen, CENTER|LONG_HEX, MKSTR(free_list)));
free_ptr = (ulong *)free_list_buf;
if (*free_ptr == free_list) {
if (verbose)
fprintf(fp, "\n");
else
fprintf(fp, "%6d %6d\n", 0, 0);
continue;
}
if (verbose)
fprintf(fp, "\n");
BZERO(ld, sizeof(struct list_data));
ld->flags = verbose | RETURN_ON_DUPLICATE;
ld->start = *free_ptr;
ld->end = free_list;
ld->list_head_offset = OFFSET(page_lru) +
OFFSET(list_head_next);
if (callback_data) {
ld->flags &= ~VERBOSE;
ld->flags |= (LIST_CALLBACK|CALLBACK_RETURN);
ld->callback_func = free_page_callback;
ld->callback_data = (void *)callback_data;
callback_data->block_size = chunk_size * PAGESIZE();
}
cnt = do_list(ld);
if (cnt < 0) {
error(pc->curcmd_flags & IGNORE_ERRORS ? INFO : FATAL,
"corrupted free list %d from free_area struct: %lx\n",
j, free_area);
if (pc->curcmd_flags & IGNORE_ERRORS)
goto bailout;
}
if (callback_data && callback_data->found) {
fprintf(fp, "%lx\n", callback_data->page);
goto bailout;
}
if (!verbose)
fprintf(fp, "%6d %6ld\n", cnt, cnt*chunk_size);
total_free += (cnt * chunk_size);
}
}
bailout:
FREEBUF(free_area_buf2);
FREEBUF(free_list_buf);
return total_free;
}
/*
* dump_kmeminfo displays basic memory use information typically shown
* by /proc/meminfo, and then some...
*/
char *kmeminfo_hdr = " PAGES TOTAL PERCENTAGE\n";
static void
dump_kmeminfo(void)
{
int i, len;
ulong totalram_pages;
ulong freeram_pages;
ulong used_pages;
ulong shared_pages;
ulong buffer_pages;
ulong subtract_buffer_pages;
ulong totalswap_pages, totalused_pages;
ulong totalhigh_pages;
ulong freehighmem_pages;
ulong totallowmem_pages;
ulong freelowmem_pages;
long nr_file_pages, nr_slab;
ulong swapper_space_nrpages;
ulong pct;
ulong value1, value2;
uint tmp;
struct meminfo meminfo;
struct gnu_request req;
long page_cache_size;
ulong get_totalram;
ulong get_buffers;
ulong get_slabs;
struct syment *sp_array[2];
char buf[BUFSIZE];
BZERO(&meminfo, sizeof(struct meminfo));
meminfo.flags = GET_ALL;
dump_mem_map(&meminfo);
get_totalram = meminfo.get_totalram;
shared_pages = meminfo.get_shared;
get_buffers = meminfo.get_buffers;
get_slabs = meminfo.get_slabs;
/*
* If vm_stat array exists, override page search info.
*/
if (vm_stat_init()) {
if (dump_vm_stat("NR_SLAB", &nr_slab, 0))
get_slabs = nr_slab;
else if (dump_vm_stat("NR_SLAB_RECLAIMABLE", &nr_slab, 0)) {
get_slabs = nr_slab;
if (dump_vm_stat("NR_SLAB_UNRECLAIMABLE", &nr_slab, 0))
get_slabs += nr_slab;
}
}
fprintf(fp, "%s", kmeminfo_hdr);
/*
* Get total RAM based upon how the various versions of si_meminfo()
* have done it, latest to earliest:
*
* Prior to 2.3.36, count all mem_map pages minus the reserved ones.
* From 2.3.36 onwards, use "totalram_pages" if set.
*/
if (symbol_exists("totalram_pages")) {
totalram_pages = vt->totalram_pages ?
vt->totalram_pages : get_totalram;
} else
totalram_pages = get_totalram;
fprintf(fp, "%10s %7ld %11s ----\n", "TOTAL MEM",
totalram_pages, pages_to_size(totalram_pages, buf));
/*
* Get free pages from dump_free_pages() or its associates.
* Used pages are a free-bee...
*/
meminfo.flags = GET_FREE_PAGES;
vt->dump_free_pages(&meminfo);
freeram_pages = meminfo.retval;
pct = (freeram_pages * 100)/totalram_pages;
fprintf(fp, "%10s %7ld %11s %3ld%% of TOTAL MEM\n",
"FREE", freeram_pages, pages_to_size(freeram_pages, buf), pct);
used_pages = totalram_pages - freeram_pages;
pct = (used_pages * 100)/totalram_pages;
fprintf(fp, "%10s %7ld %11s %3ld%% of TOTAL MEM\n",
"USED", used_pages, pages_to_size(used_pages, buf), pct);
/*
* Get shared pages from dump_mem_map(). Note that this is done
* differently than the kernel -- it just tallies the non-reserved
* pages that have a count of greater than 1.
*/
pct = (shared_pages * 100)/totalram_pages;
fprintf(fp, "%10s %7ld %11s %3ld%% of TOTAL MEM\n",
"SHARED", shared_pages, pages_to_size(shared_pages, buf), pct);
subtract_buffer_pages = 0;
if (symbol_exists("buffermem_pages")) {
get_symbol_data("buffermem_pages", sizeof(int), &tmp);
buffer_pages = (ulong)tmp;
} else if (symbol_exists("buffermem")) {
get_symbol_data("buffermem", sizeof(int), &tmp);
buffer_pages = BTOP(tmp);
} else if ((THIS_KERNEL_VERSION >= LINUX(2,6,0)) &&
symbol_exists("nr_blockdev_pages")) {
subtract_buffer_pages = buffer_pages = nr_blockdev_pages();
} else
buffer_pages = 0;
pct = (buffer_pages * 100)/totalram_pages;
fprintf(fp, "%10s %7ld %11s %3ld%% of TOTAL MEM\n",
"BUFFERS", buffer_pages, pages_to_size(buffer_pages, buf), pct);
if (CRASHDEBUG(1))
error(NOTE, "pages with buffers: %ld\n", get_buffers);
/*
* page_cache_size has evolved from a long to an atomic_t to
* not existing at all.
*/
if (symbol_exists("page_cache_size")) {
get_symbol_type("page_cache_size", NULL, &req);
if (req.length == sizeof(int)) {
get_symbol_data("page_cache_size", sizeof(int), &tmp);
page_cache_size = (long)tmp;
} else
get_symbol_data("page_cache_size", sizeof(long),
&page_cache_size);
page_cache_size -= subtract_buffer_pages;
} else if (symbol_exists("nr_pagecache")) {
get_symbol_data("nr_pagecache", sizeof(int), &tmp);
page_cache_size = (long)tmp;
page_cache_size -= subtract_buffer_pages;
} else if (dump_vm_stat("NR_FILE_PAGES", &nr_file_pages, 0)) {
char *swapper_space = GETBUF(SIZE(address_space));
swapper_space_nrpages = 0;
if (symbol_exists("swapper_spaces") &&
(len = get_array_length("swapper_spaces", NULL, 0))) {
for (i = 0; i < len; i++) {
if (!readmem(symbol_value("swapper_spaces") +
i * SIZE(address_space), KVADDR,
swapper_space, SIZE(address_space),
"swapper_space", RETURN_ON_ERROR))
break;
swapper_space_nrpages += ULONG(swapper_space +
OFFSET(address_space_nrpages));
}
} else if (symbol_exists("swapper_space") &&
readmem(symbol_value("swapper_space"), KVADDR,
swapper_space, SIZE(address_space), "swapper_space",
RETURN_ON_ERROR))
swapper_space_nrpages = ULONG(swapper_space +
OFFSET(address_space_nrpages));
page_cache_size = nr_file_pages - swapper_space_nrpages -
buffer_pages;
FREEBUF(swapper_space);
} else
page_cache_size = 0;
pct = (page_cache_size * 100)/totalram_pages;
fprintf(fp, "%10s %7ld %11s %3ld%% of TOTAL MEM\n",
"CACHED", page_cache_size,
pages_to_size(page_cache_size, buf), pct);
/*
* Although /proc/meminfo doesn't show it, show how much memory
* the slabs take up.
*/
pct = (get_slabs * 100)/totalram_pages;
fprintf(fp, "%10s %7ld %11s %3ld%% of TOTAL MEM\n",
"SLAB", get_slabs, pages_to_size(get_slabs, buf), pct);
if (symbol_exists("totalhigh_pages")) {
switch (get_syment_array("totalhigh_pages", sp_array, 2))
{
case 1:
get_symbol_data("totalhigh_pages", sizeof(ulong),
&totalhigh_pages);
break;
case 2:
if (!(readmem(sp_array[0]->value, KVADDR,
&value1, sizeof(ulong),
"totalhigh_pages #1", RETURN_ON_ERROR)))
break;
if (!(readmem(sp_array[1]->value, KVADDR,
&value2, sizeof(ulong),
"totalhigh_pages #2", RETURN_ON_ERROR)))
break;
totalhigh_pages = MAX(value1, value2);
break;
}
pct = totalhigh_pages ?
(totalhigh_pages * 100)/totalram_pages : 0;
fprintf(fp, "\n%10s %7ld %11s %3ld%% of TOTAL MEM\n",
"TOTAL HIGH", totalhigh_pages,
pages_to_size(totalhigh_pages, buf), pct);
meminfo.flags = GET_FREE_HIGHMEM_PAGES;
vt->dump_free_pages(&meminfo);
freehighmem_pages = meminfo.retval;
pct = freehighmem_pages ?
(freehighmem_pages * 100)/totalhigh_pages : 0;
fprintf(fp, "%10s %7ld %11s %3ld%% of TOTAL HIGH\n",
"FREE HIGH", freehighmem_pages,
pages_to_size(freehighmem_pages, buf), pct);
totallowmem_pages = totalram_pages - totalhigh_pages;
pct = (totallowmem_pages * 100)/totalram_pages;
fprintf(fp, "%10s %7ld %11s %3ld%% of TOTAL MEM\n",
"TOTAL LOW", totallowmem_pages,
pages_to_size(totallowmem_pages, buf), pct);
freelowmem_pages = freeram_pages - freehighmem_pages;
pct = (freelowmem_pages * 100)/totallowmem_pages;
fprintf(fp, "%10s %7ld %11s %3ld%% of TOTAL LOW\n",
"FREE LOW", freelowmem_pages,
pages_to_size(freelowmem_pages, buf), pct);
}
/*
* get swap data from dump_swap_info().
*/
fprintf(fp, "\n");
if (symbol_exists("swapper_space") || symbol_exists("swapper_spaces")) {
if (dump_swap_info(RETURN_ON_ERROR, &totalswap_pages,
&totalused_pages)) {
fprintf(fp, "%10s %7ld %11s ----\n",
"TOTAL SWAP", totalswap_pages,
pages_to_size(totalswap_pages, buf));
pct = totalswap_pages ? (totalused_pages * 100) /
totalswap_pages : 100;
fprintf(fp, "%10s %7ld %11s %3ld%% of TOTAL SWAP\n",
"SWAP USED", totalused_pages,
pages_to_size(totalused_pages, buf), pct);
pct = totalswap_pages ?
((totalswap_pages - totalused_pages) *
100) / totalswap_pages : 0;
fprintf(fp, "%10s %7ld %11s %3ld%% of TOTAL SWAP\n",
"SWAP FREE",
totalswap_pages - totalused_pages,
pages_to_size(totalswap_pages - totalused_pages,
buf), pct);
} else
error(INFO,
"swap_info[%ld].swap_map at %lx is inaccessible\n",
totalused_pages, totalswap_pages);
}
dump_zone_page_usage();
}
/*
* Emulate 2.6 nr_blockdev_pages() function.
*/
static ulong
nr_blockdev_pages(void)
{
struct list_data list_data, *ld;
int i, bdevcnt;
ulong inode, address_space;
ulong nrpages;
char *block_device_buf, *inode_buf, *address_space_buf;
ld = &list_data;
BZERO(ld, sizeof(struct list_data));
get_symbol_data("all_bdevs", sizeof(void *), &ld->start);
if (empty_list(ld->start))
return 0;
ld->flags |= LIST_ALLOCATE;
ld->end = symbol_value("all_bdevs");
ld->list_head_offset = OFFSET(block_device_bd_list);
block_device_buf = GETBUF(SIZE(block_device));
inode_buf = GETBUF(SIZE(inode));
address_space_buf = GETBUF(SIZE(address_space));
bdevcnt = do_list(ld);
/*
* go through the block_device list, emulating:
*
* ret += bdev->bd_inode->i_mapping->nrpages;
*/
for (i = nrpages = 0; i < bdevcnt; i++) {
readmem(ld->list_ptr[i], KVADDR, block_device_buf,
SIZE(block_device), "block_device buffer",
FAULT_ON_ERROR);
inode = ULONG(block_device_buf + OFFSET(block_device_bd_inode));
readmem(inode, KVADDR, inode_buf, SIZE(inode), "inode buffer",
FAULT_ON_ERROR);
address_space = ULONG(inode_buf + OFFSET(inode_i_mapping));
readmem(address_space, KVADDR, address_space_buf,
SIZE(address_space), "address_space buffer",
FAULT_ON_ERROR);
nrpages += ULONG(address_space_buf +
OFFSET(address_space_nrpages));
}
FREEBUF(ld->list_ptr);
FREEBUF(block_device_buf);
FREEBUF(inode_buf);
FREEBUF(address_space_buf);
return nrpages;
}
/*
* dump_vmlist() displays information from the vmlist.
*/
static void
dump_vmlist(struct meminfo *vi)
{
char buf[BUFSIZE];
char buf1[BUFSIZE];
char buf2[BUFSIZE];
ulong vmlist;
ulong addr, size, next, pcheck, count, verified;
physaddr_t paddr;
int mod_vmlist;
if (vt->flags & USE_VMAP_AREA) {
dump_vmap_area(vi);
return;
}
get_symbol_data("vmlist", sizeof(void *), &vmlist);
next = vmlist;
count = verified = 0;
mod_vmlist = kernel_symbol_exists("mod_vmlist");
while (next) {
if (!(pc->curcmd_flags & HEADER_PRINTED) && (next == vmlist) &&
!(vi->flags & (GET_HIGHEST|GET_PHYS_TO_VMALLOC|
GET_VMLIST_COUNT|GET_VMLIST|VMLIST_VERIFY))) {
fprintf(fp, "%s ",
mkstring(buf, MAX(strlen("VM_STRUCT"), VADDR_PRLEN),
CENTER|LJUST, "VM_STRUCT"));
fprintf(fp, "%s SIZE\n",
mkstring(buf, (VADDR_PRLEN * 2) + strlen(" - "),
CENTER|LJUST, "ADDRESS RANGE"));
pc->curcmd_flags |= HEADER_PRINTED;
}
readmem(next+OFFSET(vm_struct_addr), KVADDR,
&addr, sizeof(void *),
"vmlist addr", FAULT_ON_ERROR);
readmem(next+OFFSET(vm_struct_size), KVADDR,
&size, sizeof(ulong),
"vmlist size", FAULT_ON_ERROR);
if (vi->flags & (GET_VMLIST_COUNT|GET_VMLIST)) {
/*
* Preceding GET_VMLIST_COUNT set vi->retval.
*/
if (vi->flags & GET_VMLIST) {
if (count < vi->retval) {
vi->vmlist[count].addr = addr;
vi->vmlist[count].size = size;
}
}
count++;
goto next_entry;
}
if (!(vi->flags & ADDRESS_SPECIFIED) ||
((vi->memtype == KVADDR) &&
((vi->spec_addr >= addr) && (vi->spec_addr < (addr+size))))) {
if (vi->flags & VMLIST_VERIFY) {
verified++;
break;
}
fprintf(fp, "%s%s %s - %s %6ld\n",
mkstring(buf,VADDR_PRLEN, LONG_HEX|CENTER|LJUST,
MKSTR(next)), space(MINSPACE-1),
mkstring(buf1, VADDR_PRLEN, LONG_HEX|RJUST,
MKSTR(addr)),
mkstring(buf2, VADDR_PRLEN, LONG_HEX|LJUST,
MKSTR(addr+size)),
size);
}
if ((vi->flags & ADDRESS_SPECIFIED) &&
(vi->memtype == PHYSADDR)) {
for (pcheck = addr; pcheck < (addr+size);
pcheck += PAGESIZE()) {
if (!kvtop(NULL, pcheck, &paddr, 0))
continue;
if ((vi->spec_addr >= paddr) &&
(vi->spec_addr < (paddr+PAGESIZE()))) {
if (vi->flags & GET_PHYS_TO_VMALLOC) {
vi->retval = pcheck +
PAGEOFFSET(paddr);
return;
} else
fprintf(fp,
"%s%s %s - %s %6ld\n",
mkstring(buf, VADDR_PRLEN,
LONG_HEX|CENTER|LJUST,
MKSTR(next)), space(MINSPACE-1),
mkstring(buf1, VADDR_PRLEN,
LONG_HEX|RJUST, MKSTR(addr)),
mkstring(buf2, VADDR_PRLEN,
LONG_HEX|LJUST,
MKSTR(addr+size)), size);
break;
}
}
}
next_entry:
readmem(next+OFFSET(vm_struct_next),
KVADDR, &next, sizeof(void *),
"vmlist next", FAULT_ON_ERROR);
if (!next && mod_vmlist) {
get_symbol_data("mod_vmlist", sizeof(void *), &next);
mod_vmlist = FALSE;
}
}
if (vi->flags & GET_HIGHEST)
vi->retval = addr+size;
if (vi->flags & GET_VMLIST_COUNT)
vi->retval = count;
if (vi->flags & VMLIST_VERIFY)
vi->retval = verified;
}
static void
dump_vmap_area(struct meminfo *vi)
{
int i, cnt;
ulong start, end, vm_struct, flags;
struct list_data list_data, *ld;
char *vmap_area_buf;
ulong size, pcheck, count, verified;
physaddr_t paddr;
char buf1[BUFSIZE];
char buf2[BUFSIZE];
char buf3[BUFSIZE];
char buf4[BUFSIZE];
#define VM_VM_AREA 0x4 /* mm/vmalloc.c */
vmap_area_buf = GETBUF(SIZE(vmap_area));
start = count = verified = size = 0;
ld = &list_data;
BZERO(ld, sizeof(struct list_data));
ld->flags = LIST_HEAD_FORMAT|LIST_HEAD_POINTER|LIST_ALLOCATE;
get_symbol_data("vmap_area_list", sizeof(void *), &ld->start);
ld->list_head_offset = OFFSET(vmap_area_list);
ld->end = symbol_value("vmap_area_list");
cnt = do_list(ld);
for (i = 0; i < cnt; i++) {
if (!(pc->curcmd_flags & HEADER_PRINTED) && (i == 0) &&
!(vi->flags & (GET_HIGHEST|GET_PHYS_TO_VMALLOC|
GET_VMLIST_COUNT|GET_VMLIST|VMLIST_VERIFY))) {
fprintf(fp, "%s ",
mkstring(buf1, MAX(strlen("VMAP_AREA"), VADDR_PRLEN),
CENTER|LJUST, "VMAP_AREA"));
fprintf(fp, "%s ",
mkstring(buf1, MAX(strlen("VM_STRUCT"), VADDR_PRLEN),
CENTER|LJUST, "VM_STRUCT"));
fprintf(fp, "%s SIZE\n",
mkstring(buf1, (VADDR_PRLEN * 2) + strlen(" - "),
CENTER|LJUST, "ADDRESS RANGE"));
pc->curcmd_flags |= HEADER_PRINTED;
}
readmem(ld->list_ptr[i], KVADDR, vmap_area_buf,
SIZE(vmap_area), "vmap_area struct", FAULT_ON_ERROR);
flags = ULONG(vmap_area_buf + OFFSET(vmap_area_flags));
if (flags != VM_VM_AREA)
continue;
start = ULONG(vmap_area_buf + OFFSET(vmap_area_va_start));
end = ULONG(vmap_area_buf + OFFSET(vmap_area_va_end));
vm_struct = ULONG(vmap_area_buf + OFFSET(vmap_area_vm));
size = end - start;
if (vi->flags & (GET_VMLIST_COUNT|GET_VMLIST)) {
/*
* Preceding GET_VMLIST_COUNT set vi->retval.
*/
if (vi->flags & GET_VMLIST) {
if (count < vi->retval) {
vi->vmlist[count].addr = start;
vi->vmlist[count].size = size;
}
}
count++;
continue;
}
if (!(vi->flags & ADDRESS_SPECIFIED) ||
((vi->memtype == KVADDR) &&
((vi->spec_addr >= start) && (vi->spec_addr < (start+size))))) {
if (vi->flags & VMLIST_VERIFY) {
verified++;
break;
}
fprintf(fp, "%s%s %s%s %s - %s %7ld\n",
mkstring(buf1,VADDR_PRLEN, LONG_HEX|CENTER|LJUST,
MKSTR(ld->list_ptr[i])), space(MINSPACE-1),
mkstring(buf2,VADDR_PRLEN, LONG_HEX|CENTER|LJUST,
MKSTR(vm_struct)), space(MINSPACE-1),
mkstring(buf3, VADDR_PRLEN, LONG_HEX|RJUST,
MKSTR(start)),
mkstring(buf4, VADDR_PRLEN, LONG_HEX|LJUST,
MKSTR(start+size)),
size);
}
if ((vi->flags & ADDRESS_SPECIFIED) &&
(vi->memtype == PHYSADDR)) {
for (pcheck = start; pcheck < (start+size);
pcheck += PAGESIZE()) {
if (!kvtop(NULL, pcheck, &paddr, 0))
continue;
if ((vi->spec_addr >= paddr) &&
(vi->spec_addr < (paddr+PAGESIZE()))) {
if (vi->flags & GET_PHYS_TO_VMALLOC) {
vi->retval = pcheck +
PAGEOFFSET(paddr);
FREEBUF(ld->list_ptr);
return;
} else
fprintf(fp,
"%s%s %s%s %s - %s %7ld\n",
mkstring(buf1,VADDR_PRLEN,
LONG_HEX|CENTER|LJUST,
MKSTR(ld->list_ptr[i])),
space(MINSPACE-1),
mkstring(buf2, VADDR_PRLEN,
LONG_HEX|CENTER|LJUST,
MKSTR(vm_struct)), space(MINSPACE-1),
mkstring(buf3, VADDR_PRLEN,
LONG_HEX|RJUST, MKSTR(start)),
mkstring(buf4, VADDR_PRLEN,
LONG_HEX|LJUST,
MKSTR(start+size)), size);
break;
}
}
}
}
FREEBUF(ld->list_ptr);
if (vi->flags & GET_HIGHEST)
vi->retval = start+size;
if (vi->flags & GET_VMLIST_COUNT)
vi->retval = count;
if (vi->flags & VMLIST_VERIFY)
vi->retval = verified;
}
/*
* dump_page_lists() displays information from the active_list,
* inactive_dirty_list and inactive_clean_list from each zone.
*/
static int
dump_page_lists(struct meminfo *mi)
{
int i, c, n, retval;
ulong node_zones, pgdat;
struct node_table *nt;
struct list_data list_data, *ld;
char buf[BUFSIZE];
ulong value;
ulong inactive_clean_pages, inactive_clean_list;
int nr_active_pages, nr_inactive_pages;
int nr_inactive_dirty_pages;
ld = &list_data;
retval = FALSE;
nr_active_pages = nr_inactive_dirty_pages = -1;
BZERO(ld, sizeof(struct list_data));
ld->list_head_offset = OFFSET(page_lru);
if (mi->flags & ADDRESS_SPECIFIED)
ld->searchfor = mi->spec_addr;
else if (mi->flags & VERBOSE)
ld->flags |= VERBOSE;
if (mi->flags & GET_ACTIVE_LIST) {
if (!symbol_exists("active_list"))
error(FATAL,
"active_list does not exist in this kernel\n");
if (symbol_exists("nr_active_pages"))
get_symbol_data("nr_active_pages", sizeof(int),
&nr_active_pages);
else
error(FATAL,
"nr_active_pages does not exist in this kernel\n");
ld->end = symbol_value("active_list");
readmem(ld->end, KVADDR, &ld->start, sizeof(void *),
"LIST_HEAD contents", FAULT_ON_ERROR);
if (mi->flags & VERBOSE)
fprintf(fp, "active_list:\n");
if (ld->start == ld->end) {
c = 0;
ld->searchfor = 0;
if (mi->flags & VERBOSE)
fprintf(fp, "(empty)\n");
} else {
hq_open();
c = do_list(ld);
hq_close();
}
if ((mi->flags & ADDRESS_SPECIFIED) && ld->searchfor) {
fprintf(fp, "%lx\n", ld->searchfor);
retval = TRUE;
} else {
fprintf(fp, "%snr_active_pages: %d ",
mi->flags & VERBOSE ? "\n" : "",
nr_active_pages);
if (c != nr_active_pages)
fprintf(fp, "(found %d)\n", c);
else
fprintf(fp, "(verified)\n");
}
}
if (mi->flags & GET_INACTIVE_LIST) {
if (!symbol_exists("inactive_list"))
error(FATAL,
"inactive_list does not exist in this kernel\n");
if (symbol_exists("nr_inactive_pages"))
get_symbol_data("nr_inactive_pages", sizeof(int),
&nr_inactive_pages);
else
error(FATAL,
"nr_active_pages does not exist in this kernel\n");
ld->end = symbol_value("inactive_list");
readmem(ld->end, KVADDR, &ld->start, sizeof(void *),
"LIST_HEAD contents", FAULT_ON_ERROR);
if (mi->flags & VERBOSE)
fprintf(fp, "inactive_list:\n");
if (ld->start == ld->end) {
c = 0;
ld->searchfor = 0;
if (mi->flags & VERBOSE)
fprintf(fp, "(empty)\n");
} else {
hq_open();
c = do_list(ld);
hq_close();
}
if ((mi->flags & ADDRESS_SPECIFIED) && ld->searchfor) {
fprintf(fp, "%lx\n", ld->searchfor);
retval = TRUE;
} else {
fprintf(fp, "%snr_inactive_pages: %d ",
mi->flags & VERBOSE ? "\n" : "",
nr_inactive_pages);
if (c != nr_inactive_pages)
fprintf(fp, "(found %d)\n", c);
else
fprintf(fp, "(verified)\n");
}
}
if (mi->flags & GET_INACTIVE_DIRTY) {
if (!symbol_exists("inactive_dirty_list"))
error(FATAL,
"inactive_dirty_list does not exist in this kernel\n");
if (symbol_exists("nr_inactive_dirty_pages"))
get_symbol_data("nr_inactive_dirty_pages", sizeof(int),
&nr_inactive_dirty_pages);
else
error(FATAL,
"nr_inactive_dirty_pages does not exist in this kernel\n");
ld->end = symbol_value("inactive_dirty_list");
readmem(ld->end, KVADDR, &ld->start, sizeof(void *),
"LIST_HEAD contents", FAULT_ON_ERROR);
if (mi->flags & VERBOSE)
fprintf(fp, "%sinactive_dirty_list:\n",
mi->flags & GET_ACTIVE_LIST ? "\n" : "");
if (ld->start == ld->end) {
c = 0;
ld->searchfor = 0;
if (mi->flags & VERBOSE)
fprintf(fp, "(empty)\n");
} else {
hq_open();
c = do_list(ld);
hq_close();
}
if ((mi->flags & ADDRESS_SPECIFIED) && ld->searchfor) {
fprintf(fp, "%lx\n", ld->searchfor);
retval = TRUE;
} else {
fprintf(fp, "%snr_inactive_dirty_pages: %d ",
mi->flags & VERBOSE ? "\n" : "",
nr_inactive_dirty_pages);
if (c != nr_inactive_dirty_pages)
fprintf(fp, "(found %d)\n", c);
else
fprintf(fp, "(verified)\n");
}
}
if (mi->flags & GET_INACTIVE_CLEAN) {
if (INVALID_MEMBER(zone_struct_inactive_clean_list))
error(FATAL,
"inactive_clean_list(s) do not exist in this kernel\n");
get_symbol_data("pgdat_list", sizeof(void *), &pgdat);
if ((mi->flags & VERBOSE) &&
(mi->flags & (GET_ACTIVE_LIST|GET_INACTIVE_DIRTY)))
fprintf(fp, "\n");
for (n = 0; pgdat; n++) {
nt = &vt->node_table[n];
node_zones = nt->pgdat + OFFSET(pglist_data_node_zones);
for (i = 0; i < vt->nr_zones; i++) {
readmem(node_zones+OFFSET(zone_struct_name),
KVADDR, &value, sizeof(void *),
"zone_struct name", FAULT_ON_ERROR);
if (!read_string(value, buf, BUFSIZE-1))
sprintf(buf, "(unknown) ");
if (mi->flags & VERBOSE) {
if (vt->numnodes > 1)
fprintf(fp, "NODE %d ", n);
fprintf(fp,
"\"%s\" inactive_clean_list:\n",
buf);
}
readmem(node_zones +
OFFSET(zone_struct_inactive_clean_pages),
KVADDR, &inactive_clean_pages,
sizeof(ulong), "inactive_clean_pages",
FAULT_ON_ERROR);
readmem(node_zones +
OFFSET(zone_struct_inactive_clean_list),
KVADDR, &inactive_clean_list,
sizeof(ulong), "inactive_clean_list",
FAULT_ON_ERROR);
ld->start = inactive_clean_list;
ld->end = node_zones +
OFFSET(zone_struct_inactive_clean_list);
if (mi->flags & ADDRESS_SPECIFIED)
ld->searchfor = mi->spec_addr;
if (ld->start == ld->end) {
c = 0;
ld->searchfor = 0;
if (mi->flags & VERBOSE)
fprintf(fp, "(empty)\n");
} else {
hq_open();
c = do_list(ld);
hq_close();
}
if ((mi->flags & ADDRESS_SPECIFIED) &&
ld->searchfor) {
fprintf(fp, "%lx\n", ld->searchfor);
retval = TRUE;
} else {
if (vt->numnodes > 1)
fprintf(fp, "NODE %d ", n);
fprintf(fp, "\"%s\" ", buf);
fprintf(fp,
"inactive_clean_pages: %ld ",
inactive_clean_pages);
if (c != inactive_clean_pages)
fprintf(fp, "(found %d)\n", c);
else
fprintf(fp, "(verified)\n");
}
node_zones += SIZE(zone_struct);
}
readmem(pgdat + OFFSET_OPTION(pglist_data_node_next,
pglist_data_pgdat_next), KVADDR,
&pgdat, sizeof(void *), "pglist_data node_next",
FAULT_ON_ERROR);
}
}
return retval;
}
/*
* Check whether an address is a kmem_cache_t address, and if so, return
* a pointer to the static buffer containing its name string. Otherwise
* return NULL on failure.
*/
#define PERCPU_NOT_SUPPORTED "per-cpu slab format not supported yet\n"
static char *
is_kmem_cache_addr(ulong vaddr, char *kbuf)
{
ulong cache, cache_cache, name;
long next_offset, name_offset;
if (vt->flags & KMEM_CACHE_UNAVAIL) {
error(INFO, "kmem cache slab subsystem not available\n");
return NULL;
}
if (vt->flags & KMALLOC_SLUB)
return is_kmem_cache_addr_common(vaddr, kbuf);
if ((vt->flags & KMALLOC_COMMON) && !symbol_exists("cache_cache"))
return is_kmem_cache_addr_common(vaddr, kbuf);
name_offset = vt->flags & (PERCPU_KMALLOC_V1|PERCPU_KMALLOC_V2) ?
OFFSET(kmem_cache_s_name) : OFFSET(kmem_cache_s_c_name);
next_offset = vt->flags & (PERCPU_KMALLOC_V1|PERCPU_KMALLOC_V2) ?
OFFSET(kmem_cache_s_next) : OFFSET(kmem_cache_s_c_nextp);
cache = cache_cache = symbol_value("cache_cache");
do {
if (cache == vaddr) {
if (vt->kmem_cache_namelen) {
readmem(cache+name_offset, KVADDR, kbuf, vt->kmem_cache_namelen, "name array", FAULT_ON_ERROR);
} else {
readmem(cache+name_offset, KVADDR, &name, sizeof(name), "name", FAULT_ON_ERROR);
if (!read_string(name, kbuf, BUFSIZE-1)) {
if (vt->flags &
(PERCPU_KMALLOC_V1|PERCPU_KMALLOC_V2))
error(WARNING,
"cannot read kmem_cache_s.name string at %lx\n",
name);
else
error(WARNING,
"cannot read kmem_cache_s.c_name string at %lx\n",
name);
sprintf(kbuf, "(unknown)");
}
}
return kbuf;
}
readmem(cache+next_offset, KVADDR, &cache, sizeof(long),
"kmem_cache_s next", FAULT_ON_ERROR);
if (vt->flags & (PERCPU_KMALLOC_V1|PERCPU_KMALLOC_V2))
cache -= next_offset;
} while (cache != cache_cache);
return NULL;
}
/*
* Note same functionality as above, but instead it just
* dumps all slab cache names and their addresses.
*/
static void
kmem_cache_list(void)
{
ulong cache, cache_cache, name;
long next_offset, name_offset;
char *cache_buf;
int has_cache_chain;
ulong cache_chain;
char buf[BUFSIZE];
if (vt->flags & KMEM_CACHE_UNAVAIL) {
error(INFO, "kmem cache slab subsystem not available\n");
return;
}
if (vt->flags & (KMALLOC_SLUB|KMALLOC_COMMON)) {
kmem_cache_list_common();
return;
}
if (symbol_exists("cache_chain")) {
has_cache_chain = TRUE;
cache_chain = symbol_value("cache_chain");
} else {
has_cache_chain = FALSE;
cache_chain = 0;
}
name_offset = vt->flags & (PERCPU_KMALLOC_V1|PERCPU_KMALLOC_V2) ?
OFFSET(kmem_cache_s_name) : OFFSET(kmem_cache_s_c_name);
next_offset = vt->flags & (PERCPU_KMALLOC_V1|PERCPU_KMALLOC_V2) ?
OFFSET(kmem_cache_s_next) : OFFSET(kmem_cache_s_c_nextp);
cache = cache_cache = symbol_value("cache_cache");
cache_buf = GETBUF(SIZE(kmem_cache_s));
do {
readmem(cache, KVADDR, cache_buf, SIZE(kmem_cache_s),
"kmem_cache buffer", FAULT_ON_ERROR);
if (vt->kmem_cache_namelen) {
BCOPY(cache_buf+name_offset, buf,
vt->kmem_cache_namelen);
} else {
name = ULONG(cache_buf + name_offset);
if (!read_string(name, buf, BUFSIZE-1)) {
if (vt->flags &
(PERCPU_KMALLOC_V1|PERCPU_KMALLOC_V2))
error(WARNING,
"cannot read kmem_cache_s.name string at %lx\n",
name);
else
error(WARNING,
"cannot read kmem_cache_s.c_name string at %lx\n",
name);
sprintf(buf, "(unknown)");
}
}
fprintf(fp, "%lx %s\n", cache, buf);
cache = ULONG(cache_buf + next_offset);
if (has_cache_chain && (cache == cache_chain))
readmem(cache, KVADDR, &cache, sizeof(char *),
"cache_chain", FAULT_ON_ERROR);
if (vt->flags & (PERCPU_KMALLOC_V1|PERCPU_KMALLOC_V2))
cache -= next_offset;
} while (cache != cache_cache);
FREEBUF(cache_buf);
}
/*
* Translate an address to its physical page number, verify that the
* page in fact belongs to the slab subsystem, and if so, return the
* name of the cache to which it belongs.
*/
static char *
vaddr_to_kmem_cache(ulong vaddr, char *buf, int verbose)
{
physaddr_t paddr;
ulong page;
ulong cache;
if (!kvtop(NULL, vaddr, &paddr, 0)) {
if (verbose)
error(WARNING,
"cannot make virtual-to-physical translation: %lx\n",
vaddr);
return NULL;
}
if (!phys_to_page(paddr, &page)) {
if (verbose)
error(WARNING,
"cannot find mem_map page for address: %lx\n",
vaddr);
return NULL;
}
if ((vt->flags & KMALLOC_SLUB) ||
((vt->flags & KMALLOC_COMMON) &&
VALID_MEMBER(page_slab) && VALID_MEMBER(page_first_page))) {
readmem(compound_head(page)+OFFSET(page_slab),
KVADDR, &cache, sizeof(void *),
"page.slab", FAULT_ON_ERROR);
} else if (VALID_MEMBER(page_next))
readmem(page+OFFSET(page_next),
KVADDR, &cache, sizeof(void *),
"page.next", FAULT_ON_ERROR);
else if (VALID_MEMBER(page_list_next))
readmem(page+OFFSET(page_list_next),
KVADDR, &cache, sizeof(void *),
"page.list.next", FAULT_ON_ERROR);
else if (VALID_MEMBER(page_lru))
readmem(page+OFFSET(page_lru)+OFFSET(list_head_next),
KVADDR, &cache, sizeof(void *),
"page.lru.next", FAULT_ON_ERROR);
else
error(FATAL, "cannot determine slab cache from page struct\n");
return(is_kmem_cache_addr(cache, buf));
}
static char *
is_slab_overload_page(ulong vaddr, ulong *page_head, char *buf)
{
ulong cache;
char *p;
if ((vt->flags & SLAB_OVERLOAD_PAGE) &&
is_page_ptr(vaddr, NULL) &&
VALID_MEMBER(page_slab) && VALID_MEMBER(page_first_page)) {
readmem(compound_head(vaddr)+OFFSET(page_slab),
KVADDR, &cache, sizeof(void *),
"page.slab", FAULT_ON_ERROR);
p = is_kmem_cache_addr(cache, buf);
if (p)
*page_head = compound_head(vaddr);
return p;
}
return NULL;
}
/*
* Translate an address to its physical page number, verify that the
* page in fact belongs to the slab subsystem, and if so, return the
* address of the slab to which it belongs.
*/
static ulong
vaddr_to_slab(ulong vaddr)
{
physaddr_t paddr;
ulong page;
ulong slab;
if (!kvtop(NULL, vaddr, &paddr, 0)) {
error(WARNING,
"cannot make virtual-to-physical translation: %lx\n",
vaddr);
return 0;
}
if (!phys_to_page(paddr, &page)) {
error(WARNING, "cannot find mem_map page for address: %lx\n",
vaddr);
return 0;
}
slab = 0;
if (vt->flags & KMALLOC_SLUB)
slab = compound_head(page);
else if (vt->flags & SLAB_OVERLOAD_PAGE)
slab = page;
else if ((vt->flags & KMALLOC_COMMON) && VALID_MEMBER(page_slab_page))
readmem(page+OFFSET(page_slab_page),
KVADDR, &slab, sizeof(void *),
"page.slab_page", FAULT_ON_ERROR);
else if (VALID_MEMBER(page_prev))
readmem(page+OFFSET(page_prev),
KVADDR, &slab, sizeof(void *),
"page.prev", FAULT_ON_ERROR);
else if (VALID_MEMBER(page_list_prev))
readmem(page+OFFSET(page_list_prev),
KVADDR, &slab, sizeof(void *),
"page.list.prev", FAULT_ON_ERROR);
else if (VALID_MEMBER(page_lru))
readmem(page+OFFSET(page_lru)+OFFSET(list_head_prev),
KVADDR, &slab, sizeof(void *),
"page.lru.prev", FAULT_ON_ERROR);
else
error(FATAL, "unknown definition of struct page?\n");
return slab;
}
/*
* Initialize any data required for scouring the kmalloc subsystem more
* efficiently.
*/
char slab_hdr[100] = { 0 };
char kmem_cache_hdr[100] = { 0 };
char free_inuse_hdr[100] = { 0 };
static void
kmem_cache_init(void)
{
ulong cache, cache_end, max_cnum, max_limit, max_cpus, tmp, tmp2;
long cache_count, num_offset, next_offset;
char *cache_buf;
if (vt->flags & KMEM_CACHE_UNAVAIL)
return;
if ((vt->flags & KMEM_CACHE_DELAY) && !(pc->flags & RUNTIME))
return;
if (DUMPFILE() && (vt->flags & KMEM_CACHE_INIT))
return;
please_wait("gathering kmem slab cache data");
if (!strlen(slab_hdr)) {
if (vt->flags & KMALLOC_SLUB)
sprintf(slab_hdr,
"SLAB%sMEMORY%sNODE TOTAL ALLOCATED FREE\n",
space(VADDR_PRLEN > 8 ? 14 : 6),
space(VADDR_PRLEN > 8 ? 12 : 4));
else
sprintf(slab_hdr,
"SLAB%sMEMORY%sTOTAL ALLOCATED FREE\n",
space(VADDR_PRLEN > 8 ? 14 : 6),
space(VADDR_PRLEN > 8 ? 12 : 4));
}
if (!strlen(kmem_cache_hdr))
sprintf(kmem_cache_hdr,
"CACHE%sNAME OBJSIZE ALLOCATED TOTAL SLABS SSIZE\n",
space(VADDR_PRLEN > 8 ? 12 : 4));
if (!strlen(free_inuse_hdr))
sprintf(free_inuse_hdr, "FREE / [ALLOCATED]\n");
if (vt->flags & KMALLOC_SLUB) {
kmem_cache_init_slub();
please_wait_done();
return;
}
num_offset = vt->flags & (PERCPU_KMALLOC_V1|PERCPU_KMALLOC_V2) ?
OFFSET(kmem_cache_s_num) : OFFSET(kmem_cache_s_c_num);
next_offset = vt->flags & (PERCPU_KMALLOC_V1|PERCPU_KMALLOC_V2) ?
OFFSET(kmem_cache_s_next) : OFFSET(kmem_cache_s_c_nextp);
max_cnum = max_limit = max_cpus = cache_count = tmp2 = 0;
/*
* Pre-2.6 versions used the "cache_cache" as the head of the
* slab chain list. 2.6 uses the "cache_chain" list_head.
* In 3.6 SLAB and SLUB use the "slab_caches" list_head.
*/
if (vt->flags & PERCPU_KMALLOC_V2) {
if (kernel_symbol_exists("cache_chain")) {
get_symbol_data("cache_chain", sizeof(ulong), &cache);
cache_end = symbol_value("cache_chain");
} else if (kernel_symbol_exists("slab_caches")) {
vt->flags |= KMALLOC_COMMON;
get_symbol_data("slab_caches", sizeof(ulong), &cache);
cache_end = symbol_value("slab_caches");
} else {
error(INFO,
"unable to initialize kmem slab cache subsystem\n\n");
return;
}
cache -= next_offset;
} else
cache = cache_end = symbol_value("cache_cache");
if (!(pc->flags & RUNTIME))
kmem_cache_downsize();
cache_buf = GETBUF(SIZE(kmem_cache_s));
hq_open();
do {
cache_count++;
if (!readmem(cache, KVADDR, cache_buf, SIZE(kmem_cache_s),
"kmem_cache buffer", RETURN_ON_ERROR)) {
FREEBUF(cache_buf);
vt->flags |= KMEM_CACHE_UNAVAIL;
error(INFO,
"%sunable to initialize kmem slab cache subsystem\n\n",
DUMPFILE() ? "\n" : "");
hq_close();
return;
}
if (!hq_enter(cache)) {
error(WARNING,
"%sduplicate kmem_cache entry in cache list: %lx\n",
DUMPFILE() ? "\n" : "", cache);
error(INFO, "unable to initialize kmem slab cache subsystem\n\n");
vt->flags |= KMEM_CACHE_UNAVAIL;
hq_close();
return;
}
tmp = (ulong)(UINT(cache_buf + num_offset));
if (tmp > max_cnum)
max_cnum = tmp;
if ((tmp = max_cpudata_limit(cache, &tmp2)) > max_limit)
max_limit = tmp;
/*
* Recognize and bail out on any max_cpudata_limit() failures.
*/
if (vt->flags & KMEM_CACHE_UNAVAIL) {
FREEBUF(cache_buf);
hq_close();
return;
}
if (tmp2 > max_cpus)
max_cpus = tmp2;
cache = ULONG(cache_buf + next_offset);
switch (vt->flags & (PERCPU_KMALLOC_V1|PERCPU_KMALLOC_V2))
{
case PERCPU_KMALLOC_V1:
cache -= next_offset;
break;
case PERCPU_KMALLOC_V2:
if (cache != cache_end)
cache -= next_offset;
break;
}
} while (cache != cache_end);
hq_close();
FREEBUF(cache_buf);
vt->kmem_max_c_num = max_cnum;
vt->kmem_max_limit = max_limit;
vt->kmem_max_cpus = max_cpus;
vt->kmem_cache_count = cache_count;
if (CRASHDEBUG(2)) {
fprintf(fp, "kmem_cache_init:\n");
fprintf(fp, " kmem_max_c_num: %ld\n", vt->kmem_max_c_num);
fprintf(fp, " kmem_max_limit: %ld\n", vt->kmem_max_limit);
fprintf(fp, " kmem_max_cpus: %ld\n", vt->kmem_max_cpus);
fprintf(fp, " kmem_cache_count: %ld\n", vt->kmem_cache_count);
}
if (!(vt->flags & KMEM_CACHE_INIT)) {
if (vt->flags & PERCPU_KMALLOC_V1)
ARRAY_LENGTH_INIT(vt->kmem_cache_namelen,
kmem_cache_s_name, "kmem_cache_s.name",
NULL, sizeof(char));
else if (vt->flags & PERCPU_KMALLOC_V2)
vt->kmem_cache_namelen = 0;
else
ARRAY_LENGTH_INIT(vt->kmem_cache_namelen,
kmem_cache_s_c_name, "kmem_cache_s.c_name",
NULL, 0);
}
please_wait_done();
vt->flags |= KMEM_CACHE_INIT;
}
static ulong
kmem_cache_nodelists(ulong cache)
{
ulong nodelists = 0;
if (vt->flags & NODELISTS_IS_PTR) {
/*
* nodelists is pointer to the array
*/
if (!readmem(cache+OFFSET(kmem_cache_s_lists), KVADDR,
&nodelists, sizeof(ulong), "nodelists pointer",
RETURN_ON_ERROR))
error(WARNING, "cannot read kmem_cache nodelists pointer");
return nodelists;
} else
return cache+OFFSET(kmem_cache_s_lists);
}
static void
kmem_cache_downsize(void)
{
char *cache_buf;
ulong kmem_cache;
uint buffer_size, object_size;
int nr_node_ids;
int nr_cpu_ids;
if (vt->flags & KMALLOC_SLUB) {
if (kernel_symbol_exists("kmem_cache") &&
VALID_MEMBER(kmem_cache_objsize) &&
try_get_symbol_data("kmem_cache",
sizeof(ulong), &kmem_cache) &&
readmem(kmem_cache + OFFSET(kmem_cache_objsize),
KVADDR, &object_size, sizeof(int),
"kmem_cache objsize/object_size", RETURN_ON_ERROR)) {
ASSIGN_SIZE(kmem_cache) = object_size;
if (CRASHDEBUG(1))
fprintf(fp, "\nkmem_cache_downsize: %ld to %ld\n",
STRUCT_SIZE("kmem_cache"),
SIZE(kmem_cache));
}
return;
}
if ((THIS_KERNEL_VERSION < LINUX(2,6,22)) ||
!(vt->flags & PERCPU_KMALLOC_V2_NODES) ||
(!kernel_symbol_exists("cache_cache") &&
!kernel_symbol_exists("kmem_cache_boot")) ||
(!MEMBER_EXISTS("kmem_cache", "buffer_size") &&
!MEMBER_EXISTS("kmem_cache", "size"))) {
return;
}
if (vt->flags & NODELISTS_IS_PTR) {
/*
* More recent kernels have kmem_cache.array[] sized
* by the number of cpus plus the number of nodes.
*/
if (kernel_symbol_exists("kmem_cache_boot") &&
MEMBER_EXISTS("kmem_cache", "object_size") &&
readmem(symbol_value("kmem_cache_boot") +
MEMBER_OFFSET("kmem_cache", "object_size"),
KVADDR, &object_size, sizeof(int),
"kmem_cache_boot object_size", RETURN_ON_ERROR))
ASSIGN_SIZE(kmem_cache_s) = object_size;
else if (kernel_symbol_exists("cache_cache") &&
MEMBER_EXISTS("kmem_cache", "object_size") &&
readmem(symbol_value("cache_cache") +
MEMBER_OFFSET("kmem_cache", "object_size"),
KVADDR, &object_size, sizeof(int),
"cache_cache object_size", RETURN_ON_ERROR))
ASSIGN_SIZE(kmem_cache_s) = object_size;
else
object_size = 0;
/*
* Older kernels have kmem_cache.array[] sized by
* the number of cpus; real value is nr_cpu_ids,
* but fallback is kt->cpus.
*/
if (kernel_symbol_exists("nr_cpu_ids"))
get_symbol_data("nr_cpu_ids", sizeof(int),
&nr_cpu_ids);
else
nr_cpu_ids = kt->cpus;
ARRAY_LENGTH(kmem_cache_s_array) = nr_cpu_ids;
if (!object_size)
ASSIGN_SIZE(kmem_cache_s) = OFFSET(kmem_cache_s_array) +
sizeof(ulong) * nr_cpu_ids;
if (CRASHDEBUG(1))
fprintf(fp, "\nkmem_cache_downsize: %ld to %ld\n",
STRUCT_SIZE("kmem_cache"), SIZE(kmem_cache_s));
return;
}
cache_buf = GETBUF(SIZE(kmem_cache_s));
if (!readmem(symbol_value("cache_cache"), KVADDR, cache_buf,
SIZE(kmem_cache_s), "kmem_cache buffer", RETURN_ON_ERROR)) {
FREEBUF(cache_buf);
return;
}
buffer_size = UINT(cache_buf +
MEMBER_OFFSET("kmem_cache", "buffer_size"));
if (buffer_size < SIZE(kmem_cache_s)) {
if (kernel_symbol_exists("nr_node_ids")) {
get_symbol_data("nr_node_ids", sizeof(int),
&nr_node_ids);
vt->kmem_cache_len_nodes = nr_node_ids;
} else
vt->kmem_cache_len_nodes = 1;
if (buffer_size >= (uint)(OFFSET(kmem_cache_s_lists) +
(sizeof(void *) * vt->kmem_cache_len_nodes)))
ASSIGN_SIZE(kmem_cache_s) = buffer_size;
else
error(WARNING,
"questionable cache_cache.buffer_size: %d\n",
buffer_size);
if (CRASHDEBUG(1)) {
fprintf(fp,
"\nkmem_cache_downsize: %ld to %d\n",
STRUCT_SIZE("kmem_cache"), buffer_size);
fprintf(fp,
"kmem_cache_downsize: nr_node_ids: %ld\n",
vt->kmem_cache_len_nodes);
}
}
FREEBUF(cache_buf);
}
/*
* Stash a list of presumably-corrupted slab cache addresses.
*/
static void
mark_bad_slab_cache(ulong cache)
{
size_t sz;
if (vt->nr_bad_slab_caches) {
sz = sizeof(ulong) * (vt->nr_bad_slab_caches + 1);
if (!(vt->bad_slab_caches = realloc(vt->bad_slab_caches, sz))) {
error(INFO, "cannot realloc bad_slab_caches array\n");
vt->nr_bad_slab_caches = 0;
return;
}
} else {
if (!(vt->bad_slab_caches = (ulong *)malloc(sizeof(ulong)))) {
error(INFO, "cannot malloc bad_slab_caches array\n");
return;
}
}
vt->bad_slab_caches[vt->nr_bad_slab_caches++] = cache;
}
static int
bad_slab_cache(ulong cache)
{
int i;
for (i = 0; i < vt->nr_bad_slab_caches; i++) {
if (vt->bad_slab_caches[i] == cache)
return TRUE;
}
return FALSE;
}
/*
* Determine the largest cpudata limit for a given cache.
*/
static ulong
max_cpudata_limit(ulong cache, ulong *cpus)
{
int i;
ulong cpudata[NR_CPUS];
int limit;
ulong max_limit;
ulong shared;
ulong *start_address;
if (vt->flags & PERCPU_KMALLOC_V2_NODES)
goto kmem_cache_s_array_nodes;
if (vt->flags & PERCPU_KMALLOC_V2)
goto kmem_cache_s_array;
if (INVALID_MEMBER(kmem_cache_s_cpudata)) {
*cpus = 0;
return 0;
}
if (!readmem(cache+OFFSET(kmem_cache_s_cpudata),
KVADDR, &cpudata[0],
sizeof(ulong) * ARRAY_LENGTH(kmem_cache_s_cpudata),
"cpudata array", RETURN_ON_ERROR))
goto bail_out;
for (i = max_limit = 0; (i < ARRAY_LENGTH(kmem_cache_s_cpudata)) &&
cpudata[i]; i++) {
if (!readmem(cpudata[i]+OFFSET(cpucache_s_limit),
KVADDR, &limit, sizeof(int),
"cpucache limit", RETURN_ON_ERROR))
goto bail_out;
if (limit > max_limit)
max_limit = limit;
}
*cpus = i;
return max_limit;
kmem_cache_s_array:
if (!readmem(cache+OFFSET(kmem_cache_s_array),
KVADDR, &cpudata[0],
sizeof(ulong) * ARRAY_LENGTH(kmem_cache_s_array),
"array cache array", RETURN_ON_ERROR))
goto bail_out;
for (i = max_limit = 0; (i < ARRAY_LENGTH(kmem_cache_s_array)) &&
cpudata[i]; i++) {
if (!readmem(cpudata[i]+OFFSET(array_cache_limit),
KVADDR, &limit, sizeof(int),
"array cache limit", RETURN_ON_ERROR))
goto bail_out;
if (limit > max_limit)
max_limit = limit;
}
/*
* If the shared list can be accessed, check its size as well.
*/
if (VALID_MEMBER(kmem_list3_shared) &&
VALID_MEMBER(kmem_cache_s_lists) &&
readmem(cache+OFFSET(kmem_cache_s_lists)+OFFSET(kmem_list3_shared),
KVADDR, &shared, sizeof(void *), "kmem_list3 shared",
RETURN_ON_ERROR|QUIET) &&
readmem(shared+OFFSET(array_cache_limit),
KVADDR, &limit, sizeof(int), "shared array_cache limit",
RETURN_ON_ERROR|QUIET)) {
if (limit > max_limit)
max_limit = limit;
}
*cpus = i;
return max_limit;
kmem_cache_s_array_nodes:
if (CRASHDEBUG(3))
fprintf(fp, "kmem_cache: %lx\n", cache);
if (!readmem(cache+OFFSET(kmem_cache_s_array), KVADDR, &cpudata[0],
sizeof(ulong) * MIN(NR_CPUS, ARRAY_LENGTH(kmem_cache_s_array)),
"array cache array", RETURN_ON_ERROR))
goto bail_out;
for (i = max_limit = 0; (i < kt->cpus) && cpudata[i]; i++) {
if (!readmem(cpudata[i]+OFFSET(array_cache_limit),
KVADDR, &limit, sizeof(int),
"array cache limit", RETURN_ON_ERROR)) {
error(INFO,
"kmem_cache: %lx: invalid array_cache pointer: %lx\n",
cache, cpudata[i]);
mark_bad_slab_cache(cache);
return max_limit;
}
if (CRASHDEBUG(3))
fprintf(fp, " array limit[%d]: %d\n", i, limit);
if (limit > max_limit)
max_limit = limit;
}
*cpus = i;
/*
* Check the shared list of all the nodes.
*/
start_address = (ulong *)GETBUF(sizeof(ulong) * vt->kmem_cache_len_nodes);
if (VALID_MEMBER(kmem_list3_shared) && VALID_MEMBER(kmem_cache_s_lists) &&
readmem(kmem_cache_nodelists(cache), KVADDR, &start_address[0],
sizeof(ulong) * vt->kmem_cache_len_nodes, "array nodelist array",
RETURN_ON_ERROR)) {
for (i = 0; i < vt->kmem_cache_len_nodes; i++) {
if (start_address[i] == 0)
continue;
if (readmem(start_address[i] + OFFSET(kmem_list3_shared),
KVADDR, &shared, sizeof(void *),
"kmem_list3 shared", RETURN_ON_ERROR|QUIET)) {
if (!shared)
break;
} else
continue;
if (readmem(shared + OFFSET(array_cache_limit),
KVADDR, &limit, sizeof(int), "shared array_cache limit",
RETURN_ON_ERROR|QUIET)) {
if (CRASHDEBUG(3))
fprintf(fp,
" shared node limit[%d]: %d\n",
i, limit);
if (limit > max_limit)
max_limit = limit;
break;
}
}
}
FREEBUF(start_address);
return max_limit;
bail_out:
vt->flags |= KMEM_CACHE_UNAVAIL;
error(INFO, "unable to initialize kmem slab cache subsystem\n\n");
*cpus = 0;
return 0;
}
/*
* Determine whether the current slab cache is contained in
* the comma-separated list from a "kmem -I list1,list2 ..."
* command entry.
*/
static int
ignore_cache(struct meminfo *si, char *name)
{
int i, argc;
char *p1;
char *arglist[MAXARGS];
char buf[BUFSIZE];
if (!si->ignore)
return FALSE;
strcpy(buf, si->ignore);
p1 = buf;
while (*p1) {
if (*p1 == ',')
*p1 = ' ';
p1++;
}
argc = parse_line(buf, arglist);
for (i = 0; i < argc; i++) {
if (STREQ(name, arglist[i]))
return TRUE;
}
return FALSE;
}
/*
* dump_kmem_cache() displays basic information about kmalloc() slabs.
* At this point, only kmem_cache_s structure data for each slab is dumped.
*
* TBD: Given a specified physical address, and determine which slab it came
* from, and whether it's in use or not.
*/
#define SLAB_C_MAGIC 0x4F17A36DUL
#define SLAB_MAGIC_ALLOC 0xA5C32F2BUL /* slab is alive */
#define SLAB_MAGIC_DESTROYED 0xB2F23C5AUL /* slab has been destroyed */
#define SLAB_CFLGS_BUFCTL 0x020000UL /* bufctls in own cache */
#define KMEM_SLAB_ADDR (1)
#define KMEM_BUFCTL_ADDR (2)
#define KMEM_OBJECT_ADDR_FREE (3)
#define KMEM_OBJECT_ADDR_INUSE (4)
#define KMEM_OBJECT_ADDR_CACHED (5)
#define KMEM_ON_SLAB (6)
#define KMEM_OBJECT_ADDR_SHARED (7)
#define KMEM_SLAB_OVERLOAD_PAGE (8)
#define KMEM_SLAB_FREELIST (9)
#define DUMP_KMEM_CACHE_INFO_V1() \
{ \
char b1[BUFSIZE]; \
fprintf(fp, "%s %-18s %8ld ", \
mkstring(b1, VADDR_PRLEN, LJUST|LONG_HEX, MKSTR(si->cache)), \
buf, si->size); \
fprintf(fp, "%9ld %8ld %5ld %3ldk\n", \
vt->flags & PERCPU_KMALLOC_V1 ? \
si->inuse - si->cpucached_cache : \
si->inuse, si->num_slabs * si->c_num, \
si->num_slabs, si->slabsize/1024); \
}
#define DUMP_KMEM_CACHE_INFO_V2() dump_kmem_cache_info_v2(si)
static void
dump_kmem_cache_info_v2(struct meminfo *si)
{
char b1[BUFSIZE];
char b2[BUFSIZE];
int namelen, sizelen, spacelen;
fprintf(fp, "%s ",
mkstring(b1, VADDR_PRLEN, LJUST|LONG_HEX, MKSTR(si->cache)));
namelen = strlen(si->curname);
sprintf(b2, "%ld", si->size);
sizelen = strlen(b2);
spacelen = 0;
if (namelen++ > 18) {
spacelen = 29 - namelen - sizelen;
fprintf(fp, "%s%s%ld ", si->curname,
space(spacelen <= 0 ? 1 : spacelen), si->size);
if (spacelen > 0)
spacelen = 1;
sprintf(b1, "%c%dld ", '%', 9 + spacelen - 1);
} else {
fprintf(fp, "%-18s %8ld ", si->curname, si->size);
sprintf(b1, "%c%dld ", '%', 9);
}
fprintf(fp, b1, vt->flags & (PERCPU_KMALLOC_V2) ?
si->inuse - si->cpucached_cache : si->inuse);
fprintf(fp, "%8ld %s%5ld %s%3ldk\n",
si->num_slabs * si->c_num,
si->num_slabs < 100000 ? " " : "", si->num_slabs,
(si->slabsize/1024) < 1000 ? " " : "", si->slabsize/1024);
}
#define DUMP_SLAB_INFO() \
{ \
char b1[BUFSIZE], b2[BUFSIZE]; \
ulong allocated, freeobjs, slab; \
if (vt->flags & SLAB_OVERLOAD_PAGE) \
slab = si->slab - OFFSET(page_lru); \
else \
slab = si->slab; \
if (vt->flags & (PERCPU_KMALLOC_V1|PERCPU_KMALLOC_V2)) { \
allocated = si->s_inuse - si->cpucached_slab; \
freeobjs = si->c_num - allocated - si->cpucached_slab; \
} else { \
allocated = si->s_inuse; \
freeobjs = si->c_num - si->s_inuse; \
} \
fprintf(fp, "%s %s %5ld %9ld %4ld\n", \
mkstring(b1, VADDR_PRLEN, LJUST|LONG_HEX, MKSTR(slab)), \
mkstring(b2, VADDR_PRLEN, LJUST|LONG_HEX, MKSTR(si->s_mem)), \
si->c_num, allocated, \
vt->flags & (PERCPU_KMALLOC_V1|PERCPU_KMALLOC_V2) ? \
freeobjs + si->cpucached_slab : freeobjs); \
}
static void
dump_kmem_cache(struct meminfo *si)
{
char buf[BUFSIZE];
char kbuf[BUFSIZE];
char *reqname;
ulong cache_cache;
ulong name, magic;
int cnt;
char *p1;
if (vt->flags & (PERCPU_KMALLOC_V1|PERCPU_KMALLOC_V2))
error(FATAL,
"dump_kmem_cache called with PERCPU_KMALLOC_V[12] set\n");
si->found = si->retval = 0;
reqname = NULL;
if ((!(si->flags & VERBOSE) || si->reqname) &&
!(si->flags & (ADDRESS_SPECIFIED|GET_SLAB_PAGES)))
fprintf(fp, "%s", kmem_cache_hdr);
si->addrlist = (ulong *)GETBUF((vt->kmem_max_c_num+1) * sizeof(ulong));
cnt = 0;
if (si->flags & CACHE_SET) {
readmem(si->cache+OFFSET(kmem_cache_s_c_nextp),
KVADDR, &cache_cache, sizeof(ulong),
"kmem_cache next", FAULT_ON_ERROR);
} else
si->cache = cache_cache = symbol_value("cache_cache");
if (si->flags & ADDRESS_SPECIFIED) {
if (!(p1 = vaddr_to_kmem_cache(si->spec_addr, kbuf, VERBOSE))) {
error(INFO,
"address is not allocated in slab subsystem: %lx\n",
si->spec_addr);
return;
}
if (si->reqname && (si->reqname != p1))
error(INFO,
"ignoring pre-selected %s cache for address: %lx\n",
si->reqname, si->spec_addr, si->reqname);
reqname = p1;
} else
reqname = si->reqname;
si->cache_buf = GETBUF(SIZE(kmem_cache_s));
do {
if ((si->flags & VERBOSE) && !si->reqname &&
!(si->flags & ADDRESS_SPECIFIED))
fprintf(fp, "%s%s", cnt++ ? "\n" : "", kmem_cache_hdr);
readmem(si->cache, KVADDR, si->cache_buf, SIZE(kmem_cache_s),
"kmem_cache buffer", FAULT_ON_ERROR);
if (vt->kmem_cache_namelen) {
BCOPY(si->cache_buf + OFFSET(kmem_cache_s_c_name),
buf, vt->kmem_cache_namelen);
} else {
name = ULONG(si->cache_buf +
OFFSET(kmem_cache_s_c_name));
if (!read_string(name, buf, BUFSIZE-1)) {
error(WARNING,
"cannot read kmem_cache_s.c_name string at %lx\n",
name);
sprintf(buf, "(unknown)");
}
}
if (reqname && !STREQ(reqname, buf))
goto next_cache;
if (ignore_cache(si, buf)) {
fprintf(fp, "%lx %-18s [IGNORED]\n", si->cache, buf);
goto next_cache;
}
si->curname = buf;
if (CRASHDEBUG(1))
fprintf(fp, "cache: %lx %s\n", si->cache, si->curname);
console("cache: %lx %s\n", si->cache, si->curname);
magic = ULONG(si->cache_buf + OFFSET(kmem_cache_s_c_magic));
if (magic == SLAB_C_MAGIC) {
si->size = ULONG(si->cache_buf +
OFFSET(kmem_cache_s_c_org_size));
if (!si->size) {
if (STREQ(si->curname, "kmem_cache"))
si->size = SIZE(kmem_cache_s);
else {
error(INFO,
"\"%s\" cache: c_org_size: %ld\n",
si->curname, si->size);
si->errors++;
}
}
si->c_flags = ULONG(si->cache_buf +
OFFSET(kmem_cache_s_c_flags));
si->c_offset = ULONG(si->cache_buf +
OFFSET(kmem_cache_s_c_offset));
si->order = ULONG(si->cache_buf +
OFFSET(kmem_cache_s_c_gfporder));
si->c_num = ULONG(si->cache_buf +
OFFSET(kmem_cache_s_c_num));
do_slab_chain(SLAB_GET_COUNTS, si);
if (!(si->flags & (ADDRESS_SPECIFIED|GET_SLAB_PAGES)))
DUMP_KMEM_CACHE_INFO_V1();
if (si->flags == GET_SLAB_PAGES)
si->retval += (si->num_slabs *
(si->slabsize/PAGESIZE()));
if (si->flags & (VERBOSE|ADDRESS_SPECIFIED)) {
si->slab = (si->flags & ADDRESS_SPECIFIED) ?
vaddr_to_slab(si->spec_addr) : 0;
do_slab_chain(SLAB_WALKTHROUGH, si);
if (si->found) {
fprintf(fp, "%s", kmem_cache_hdr);
DUMP_KMEM_CACHE_INFO_V1();
fprintf(fp, "%s", slab_hdr);
DUMP_SLAB_INFO();
switch (si->found)
{
case KMEM_BUFCTL_ADDR:
fprintf(fp, " %lx ",
(ulong)si->spec_addr);
fprintf(fp,
"(ON-SLAB kmem_bufctl_t)\n");
break;
case KMEM_SLAB_ADDR:
fprintf(fp, " %lx ",
(ulong)si->spec_addr);
fprintf(fp,
"(ON-SLAB kmem_slab_t)\n");
break;
case KMEM_ON_SLAB:
fprintf(fp, " %lx ",
(ulong)si->spec_addr);
fprintf(fp,
"(unused part of slab)\n");
break;
case KMEM_OBJECT_ADDR_FREE:
fprintf(fp, "%s",
free_inuse_hdr);
fprintf(fp, " %lx\n",
si->container ? si->container :
(ulong)si->spec_addr);
break;
case KMEM_OBJECT_ADDR_INUSE:
fprintf(fp, "%s",
free_inuse_hdr);
fprintf(fp, " [%lx]\n",
si->container ? si->container :
(ulong)si->spec_addr);
break;
}
break;
}
}
} else {
error(INFO, "\"%s\" cache: invalid c_magic: %lx\n",
si->curname, magic);
si->errors++;
}
next_cache:
si->cache = ULONG(si->cache_buf + OFFSET(kmem_cache_s_c_nextp));
} while (si->cache != cache_cache);
FREEBUF(si->cache_buf);
if ((si->flags & ADDRESS_SPECIFIED) && !si->found)
error(INFO, "%s: address not found in cache: %lx\n",
reqname, si->spec_addr);
if (si->errors)
error(INFO, "%ld error%s encountered\n",
si->errors, si->errors > 1 ? "s" : "");
FREEBUF(si->addrlist);
}
/*
* dump_kmem_cache() adapted for newer percpu slab format.
*/
static void
dump_kmem_cache_percpu_v1(struct meminfo *si)
{
int i;
char buf[BUFSIZE];
char kbuf[BUFSIZE];
char *reqname;
ulong cache_cache;
ulong name;
int cnt;
uint tmp_val; /* Used as temporary variable to read sizeof(int) and
assigned to ulong variable. We are doing this to mask
the endian issue */
char *p1;
if (!(vt->flags & PERCPU_KMALLOC_V1))
error(FATAL,
"dump_kmem_cache_percpu called without PERCPU_KMALLOC_V1\n");
si->found = si->retval = 0;
reqname = NULL;
if ((!(si->flags & VERBOSE) || si->reqname) &&
!(si->flags & (ADDRESS_SPECIFIED|GET_SLAB_PAGES)))
fprintf(fp, "%s", kmem_cache_hdr);
si->addrlist = (ulong *)GETBUF((vt->kmem_max_c_num+1) * sizeof(ulong));
si->kmem_bufctl = (int *)GETBUF((vt->kmem_max_c_num+1) * sizeof(int));
for (i = 0; i < vt->kmem_max_cpus; i++)
si->cpudata[i] = (ulong *)
GETBUF(vt->kmem_max_limit * sizeof(ulong));
cnt = 0;
if (si->flags & CACHE_SET) {
readmem(si->cache+OFFSET(kmem_cache_s_next),
KVADDR, &cache_cache, sizeof(ulong),
"kmem_cache_s next", FAULT_ON_ERROR);
} else
si->cache = cache_cache = symbol_value("cache_cache");
if (si->flags & ADDRESS_SPECIFIED) {
if (!(p1 = vaddr_to_kmem_cache(si->spec_addr, kbuf, VERBOSE))) {
error(INFO,
"address is not allocated in slab subsystem: %lx\n",
si->spec_addr);
return;
}
if (si->reqname && (si->reqname != p1))
error(INFO,
"ignoring pre-selected %s cache for address: %lx\n",
si->reqname, si->spec_addr, si->reqname);
reqname = p1;
} else
reqname = si->reqname;
do {
if ((si->flags & VERBOSE) && !si->reqname &&
!(si->flags & ADDRESS_SPECIFIED))
fprintf(fp, "%s%s", cnt++ ? "\n" : "", kmem_cache_hdr);
if (vt->kmem_cache_namelen) {
readmem(si->cache+OFFSET(kmem_cache_s_name),
KVADDR, buf, vt->kmem_cache_namelen,
"name array", FAULT_ON_ERROR);
} else {
readmem(si->cache+OFFSET(kmem_cache_s_name),
KVADDR, &name, sizeof(ulong),
"name", FAULT_ON_ERROR);
if (!read_string(name, buf, BUFSIZE-1)) {
error(WARNING,
"cannot read kmem_cache_s.name string at %lx\n",
name);
sprintf(buf, "(unknown)");
}
}
if (reqname && !STREQ(reqname, buf))
goto next_cache;
if (ignore_cache(si, buf)) {
fprintf(fp, "%lx %-18s [IGNORED]\n", si->cache, buf);
goto next_cache;
}
si->curname = buf;
readmem(si->cache+OFFSET(kmem_cache_s_objsize),
KVADDR, &tmp_val, sizeof(uint),
"objsize", FAULT_ON_ERROR);
si->size = (ulong)tmp_val;
if (!si->size) {
if (STREQ(si->curname, "kmem_cache"))
si->size = SIZE(kmem_cache_s);
else {
error(INFO, "\"%s\" cache: objsize: %ld\n",
si->curname, si->size);
si->errors++;
}
}
readmem(si->cache+OFFSET(kmem_cache_s_flags),
KVADDR, &tmp_val, sizeof(uint),
"kmem_cache_s flags", FAULT_ON_ERROR);
si->c_flags = (ulong)tmp_val;
readmem(si->cache+OFFSET(kmem_cache_s_gfporder),
KVADDR, &tmp_val, sizeof(uint),
"gfporder", FAULT_ON_ERROR);
si->order = (ulong)tmp_val;
readmem(si->cache+OFFSET(kmem_cache_s_num),
KVADDR, &tmp_val, sizeof(uint),
"kmem_cache_s num", FAULT_ON_ERROR);
si->c_num = (ulong)tmp_val;
do_slab_chain_percpu_v1(SLAB_GET_COUNTS, si);
if (!(si->flags & (ADDRESS_SPECIFIED|GET_SLAB_PAGES))) {
DUMP_KMEM_CACHE_INFO_V1();
if (CRASHDEBUG(3))
dump_struct("kmem_cache_s", si->cache, 0);
}
if (si->flags == GET_SLAB_PAGES)
si->retval += (si->num_slabs *
(si->slabsize/PAGESIZE()));
if (si->flags & (VERBOSE|ADDRESS_SPECIFIED)) {
gather_cpudata_list_v1(si);
si->slab = (si->flags & ADDRESS_SPECIFIED) ?
vaddr_to_slab(si->spec_addr) : 0;
do_slab_chain_percpu_v1(SLAB_WALKTHROUGH, si);
if (si->found) {
fprintf(fp, "%s", kmem_cache_hdr);
DUMP_KMEM_CACHE_INFO_V1();
fprintf(fp, "%s", slab_hdr);
gather_slab_cached_count(si);
DUMP_SLAB_INFO();
switch (si->found)
{
case KMEM_BUFCTL_ADDR:
fprintf(fp, " %lx ",
(ulong)si->spec_addr);
fprintf(fp,"(kmem_bufctl_t)\n");
break;
case KMEM_SLAB_ADDR:
fprintf(fp, " %lx ",
(ulong)si->spec_addr);
fprintf(fp, "(slab_s)\n");
break;
case KMEM_ON_SLAB:
fprintf(fp, " %lx ",
(ulong)si->spec_addr);
fprintf(fp, "(unused part of slab)\n");
break;
case KMEM_OBJECT_ADDR_FREE:
fprintf(fp, "%s", free_inuse_hdr);
fprintf(fp, " %lx\n",
si->container ? si->container :
(ulong)si->spec_addr);
break;
case KMEM_OBJECT_ADDR_INUSE:
fprintf(fp, "%s", free_inuse_hdr);
fprintf(fp, " [%lx]\n",
si->container ? si->container :
(ulong)si->spec_addr);
break;
case KMEM_OBJECT_ADDR_CACHED:
fprintf(fp, "%s", free_inuse_hdr);
fprintf(fp,
" %lx (cpu %d cache)\n",
si->container ? si->container :
(ulong)si->spec_addr, si->cpu);
break;
}
break;
}
}
next_cache:
readmem(si->cache+OFFSET(kmem_cache_s_next),
KVADDR, &si->cache, sizeof(ulong),
"kmem_cache_s next", FAULT_ON_ERROR);
si->cache -= OFFSET(kmem_cache_s_next);
} while (si->cache != cache_cache);
if ((si->flags & ADDRESS_SPECIFIED) && !si->found)
error(INFO, "%s: address not found in cache: %lx\n",
reqname, si->spec_addr);
if (si->errors)
error(INFO, "%ld error%s encountered\n",
si->errors, si->errors > 1 ? "s" : "");
FREEBUF(si->addrlist);
FREEBUF(si->kmem_bufctl);
for (i = 0; i < vt->kmem_max_cpus; i++)
FREEBUF(si->cpudata[i]);
}
/*
* Updated for 2.6 slab substructure.
*/
static void
dump_kmem_cache_percpu_v2(struct meminfo *si)
{
int i;
char buf[BUFSIZE];
char kbuf[BUFSIZE];
char *reqname;
ulong cache_end;
ulong name, page_head;
int cnt;
uint tmp_val; /* Used as temporary variable to read sizeof(int) and
assigned to ulong variable. We are doing this to mask
the endian issue */
char *p1;
if (!(vt->flags & PERCPU_KMALLOC_V2))
error(FATAL,
"dump_kmem_cache_percpu called without PERCPU_KMALLOC_V2\n");
si->found = si->retval = 0;
reqname = NULL;
if ((!(si->flags & VERBOSE) || si->reqname) &&
!(si->flags & (ADDRESS_SPECIFIED|GET_SLAB_PAGES)))
fprintf(fp, "%s", kmem_cache_hdr);
si->addrlist = (ulong *)GETBUF((vt->kmem_max_c_num+1) * sizeof(ulong));
si->kmem_bufctl = (int *)GETBUF((vt->kmem_max_c_num+1) * sizeof(int));
if (vt->flags & SLAB_OVERLOAD_PAGE) {
si->freelist = si->kmem_bufctl;
si->freelist_index_size = slab_freelist_index_size();
}
for (i = 0; i < vt->kmem_max_cpus; i++)
si->cpudata[i] = (ulong *)
GETBUF(vt->kmem_max_limit * sizeof(ulong));
if(vt->flags & PERCPU_KMALLOC_V2_NODES)
si->shared_array_cache = (ulong *)
GETBUF(vt->kmem_cache_len_nodes *
(vt->kmem_max_limit+1) * sizeof(ulong));
else
si->shared_array_cache = (ulong *)
GETBUF((vt->kmem_max_limit+1) * sizeof(ulong));
cnt = 0;
if (si->flags & CACHE_SET)
readmem(si->cache+OFFSET(kmem_cache_s_next),
KVADDR, &cache_end, sizeof(ulong),
"kmem_cache_s next", FAULT_ON_ERROR);
else {
if (vt->flags & KMALLOC_COMMON) {
get_symbol_data("slab_caches", sizeof(ulong), &si->cache);
si->cache -= OFFSET(kmem_cache_s_next);
cache_end = symbol_value("slab_caches");
} else {
get_symbol_data("cache_chain", sizeof(ulong), &si->cache);
si->cache -= OFFSET(kmem_cache_s_next);
cache_end = symbol_value("cache_chain");
}
}
if (si->flags & ADDRESS_SPECIFIED) {
if ((p1 = is_slab_overload_page(si->spec_addr, &page_head, kbuf))) {
si->flags |= SLAB_OVERLOAD_PAGE_PTR;
si->spec_addr = page_head;
} else if (!(p1 = vaddr_to_kmem_cache(si->spec_addr, kbuf, VERBOSE))) {
error(INFO,
"address is not allocated in slab subsystem: %lx\n",
si->spec_addr);
return;
}
if (si->reqname && (si->reqname != p1))
error(INFO,
"ignoring pre-selected %s cache for address: %lx\n",
si->reqname, si->spec_addr, si->reqname);
reqname = p1;
} else
reqname = si->reqname;
do {
if ((si->flags & VERBOSE) && !si->reqname &&
!(si->flags & ADDRESS_SPECIFIED))
fprintf(fp, "%s%s", cnt++ ? "\n" : "", kmem_cache_hdr);
if (vt->kmem_cache_namelen) {
readmem(si->cache+OFFSET(kmem_cache_s_name),
KVADDR, buf, vt->kmem_cache_namelen,
"name array", FAULT_ON_ERROR);
} else {
readmem(si->cache+OFFSET(kmem_cache_s_name),
KVADDR, &name, sizeof(ulong),
"name", FAULT_ON_ERROR);
if (!read_string(name, buf, BUFSIZE-1)) {
error(WARNING,
"cannot read kmem_cache_s.name string at %lx\n",
name);
sprintf(buf, "(unknown)");
}
}
if (reqname && !STREQ(reqname, buf))
goto next_cache;
if (ignore_cache(si, buf)) {
fprintf(fp, "%lx %-18s [IGNORED]\n", si->cache, buf);
goto next_cache;
}
if (bad_slab_cache(si->cache)) {
fprintf(fp, "%lx %-18s [INVALID/CORRUPTED]\n", si->cache, buf);
goto next_cache;
}
si->curname = buf;
readmem(si->cache+OFFSET(kmem_cache_s_objsize),
KVADDR, &tmp_val, sizeof(uint),
"objsize", FAULT_ON_ERROR);
si->size = (ulong)tmp_val;
if (!si->size) {
if (STREQ(si->curname, "kmem_cache"))
si->size = SIZE(kmem_cache_s);
else {
error(INFO, "\"%s\" cache: objsize: %ld\n",
si->curname, si->size);
si->errors++;
}
}
readmem(si->cache+OFFSET(kmem_cache_s_flags),
KVADDR, &tmp_val, sizeof(uint),
"kmem_cache_s flags", FAULT_ON_ERROR);
si->c_flags = (ulong)tmp_val;
readmem(si->cache+OFFSET(kmem_cache_s_gfporder),
KVADDR, &tmp_val, sizeof(uint),
"gfporder", FAULT_ON_ERROR);
si->order = (ulong)tmp_val;
readmem(si->cache+OFFSET(kmem_cache_s_num),
KVADDR, &tmp_val, sizeof(uint),
"kmem_cache_s num", FAULT_ON_ERROR);
si->c_num = (ulong)tmp_val;
if (vt->flags & PERCPU_KMALLOC_V2_NODES) {
if (vt->flags & SLAB_OVERLOAD_PAGE)
do_slab_chain_slab_overload_page(SLAB_GET_COUNTS, si);
else
do_slab_chain_percpu_v2_nodes(SLAB_GET_COUNTS, si);
} else
do_slab_chain_percpu_v2(SLAB_GET_COUNTS, si);
if (!(si->flags & (ADDRESS_SPECIFIED|GET_SLAB_PAGES))) {
DUMP_KMEM_CACHE_INFO_V2();
if (CRASHDEBUG(3))
dump_struct("kmem_cache_s", si->cache, 0);
}
if (si->flags == GET_SLAB_PAGES)
si->retval += (si->num_slabs *
(si->slabsize/PAGESIZE()));
if (si->flags & (VERBOSE|ADDRESS_SPECIFIED)) {
if (!(vt->flags & PERCPU_KMALLOC_V2_NODES))
gather_cpudata_list_v2(si);
si->slab = (si->flags & ADDRESS_SPECIFIED) ?
vaddr_to_slab(si->spec_addr) : 0;
if (vt->flags & PERCPU_KMALLOC_V2_NODES) {
if (vt->flags & SLAB_OVERLOAD_PAGE)
do_slab_chain_slab_overload_page(SLAB_WALKTHROUGH, si);
else
do_slab_chain_percpu_v2_nodes(SLAB_WALKTHROUGH, si);
} else
do_slab_chain_percpu_v2(SLAB_WALKTHROUGH, si);
if (si->found) {
fprintf(fp, "%s", kmem_cache_hdr);
DUMP_KMEM_CACHE_INFO_V2();
fprintf(fp, "%s", slab_hdr);
gather_slab_cached_count(si);
DUMP_SLAB_INFO();
switch (si->found)
{
case KMEM_BUFCTL_ADDR:
fprintf(fp, " %lx ",
(ulong)si->spec_addr);
fprintf(fp,"(kmem_bufctl_t)\n");
break;
case KMEM_SLAB_ADDR:
fprintf(fp, " %lx ",
(ulong)si->spec_addr);
fprintf(fp, "(slab)\n");
break;
case KMEM_ON_SLAB:
fprintf(fp, " %lx ",
(ulong)si->spec_addr);
fprintf(fp, "(unused part of slab)\n");
break;
case KMEM_SLAB_FREELIST:
fprintf(fp, " %lx ",
(ulong)si->spec_addr);
fprintf(fp, "(on-slab freelist)\n");
break;
case KMEM_SLAB_OVERLOAD_PAGE:
si->flags &= ~ADDRESS_SPECIFIED;
dump_slab_objects_percpu(si);
si->flags |= ADDRESS_SPECIFIED;
break;
case KMEM_OBJECT_ADDR_FREE:
fprintf(fp, "%s", free_inuse_hdr);
fprintf(fp, " %lx\n",
si->container ? si->container :
(ulong)si->spec_addr);
break;
case KMEM_OBJECT_ADDR_INUSE:
fprintf(fp, "%s", free_inuse_hdr);
fprintf(fp, " [%lx]\n",
si->container ? si->container :
(ulong)si->spec_addr);
break;
case KMEM_OBJECT_ADDR_CACHED:
fprintf(fp, "%s", free_inuse_hdr);
fprintf(fp,
" %lx (cpu %d cache)\n",
si->container ? si->container :
(ulong)si->spec_addr, si->cpu);
break;
case KMEM_OBJECT_ADDR_SHARED:
fprintf(fp, "%s", free_inuse_hdr);
fprintf(fp,
" %lx (shared cache)\n",
si->container ? si->container :
(ulong)si->spec_addr);
break;
}
break;
}
}
next_cache:
readmem(si->cache+OFFSET(kmem_cache_s_next),
KVADDR, &si->cache, sizeof(ulong),
"kmem_cache_s next", FAULT_ON_ERROR);
if (si->cache != cache_end)
si->cache -= OFFSET(kmem_cache_s_next);
} while (si->cache != cache_end);
if ((si->flags & ADDRESS_SPECIFIED) && !si->found)
error(INFO, "%s: address not found in cache: %lx\n",
reqname, si->spec_addr);
if (si->errors)
error(INFO, "%ld error%s encountered\n",
si->errors, si->errors > 1 ? "s" : "");
FREEBUF(si->addrlist);
FREEBUF(si->kmem_bufctl);
for (i = 0; i < vt->kmem_max_cpus; i++)
FREEBUF(si->cpudata[i]);
FREEBUF(si->shared_array_cache);
}
/*
* Walk through the slab chain hanging off a kmem_cache_s structure,
* gathering basic statistics.
*
* TBD: Given a specified physical address, determine whether it's in this
* slab chain, and whether it's in use or not.
*/
#define INSLAB(obj, si) \
((ulong)((ulong)(obj) & ~(si->slabsize-1)) == si->s_mem)
static void
do_slab_chain(int cmd, struct meminfo *si)
{
ulong tmp, magic;
ulong kmem_slab_end;
char *kmem_slab_s_buf;
si->slabsize = (power(2, si->order) * PAGESIZE());
kmem_slab_end = si->cache + OFFSET(kmem_cache_s_c_offset);
switch (cmd)
{
case SLAB_GET_COUNTS:
si->slab = ULONG(si->cache_buf + OFFSET(kmem_cache_s_c_firstp));
if (slab_data_saved(si))
return;
si->num_slabs = si->inuse = 0;
if (si->slab == kmem_slab_end)
return;
kmem_slab_s_buf = GETBUF(SIZE(kmem_slab_s));
do {
if (received_SIGINT()) {
FREEBUF(kmem_slab_s_buf);
restart(0);
}
readmem(si->slab, KVADDR, kmem_slab_s_buf,
SIZE(kmem_slab_s), "kmem_slab_s buffer",
FAULT_ON_ERROR);
magic = ULONG(kmem_slab_s_buf +
OFFSET(kmem_slab_s_s_magic));
if (magic == SLAB_MAGIC_ALLOC) {
tmp = ULONG(kmem_slab_s_buf +
OFFSET(kmem_slab_s_s_inuse));
si->inuse += tmp;
si->num_slabs++;
} else {
fprintf(fp,
"\"%s\" cache: invalid s_magic: %lx\n",
si->curname, magic);
si->errors++;
FREEBUF(kmem_slab_s_buf);
return;
}
si->slab = ULONG(kmem_slab_s_buf +
OFFSET(kmem_slab_s_s_nextp));
} while (si->slab != kmem_slab_end);
FREEBUF(kmem_slab_s_buf);
save_slab_data(si);
break;
case SLAB_WALKTHROUGH:
if (!si->slab)
si->slab = ULONG(si->cache_buf +
OFFSET(kmem_cache_s_c_firstp));
if (si->slab == kmem_slab_end)
return;
if (CRASHDEBUG(1)) {
fprintf(fp, "search cache: [%s] ", si->curname);
if (si->flags & ADDRESS_SPECIFIED)
fprintf(fp, "for %llx", si->spec_addr);
fprintf(fp, "\n");
}
si->slab_buf = kmem_slab_s_buf = GETBUF(SIZE(kmem_slab_s));
do {
if (received_SIGINT()) {
FREEBUF(kmem_slab_s_buf);
restart(0);
}
readmem(si->slab, KVADDR, kmem_slab_s_buf,
SIZE(kmem_slab_s), "kmem_slab_s buffer",
FAULT_ON_ERROR);
dump_slab(si);
if (si->found) {
FREEBUF(kmem_slab_s_buf);
return;
}
si->slab = ULONG(kmem_slab_s_buf +
OFFSET(kmem_slab_s_s_nextp));
} while (si->slab != kmem_slab_end);
FREEBUF(kmem_slab_s_buf);
break;
}
}
/*
* do_slab_chain() adapted for newer percpu slab format.
*/
#define SLAB_BASE(X) (PTOB(BTOP(X)))
#define INSLAB_PERCPU(obj, si) \
((ulong)((ulong)(obj) & ~(si->slabsize-1)) == SLAB_BASE(si->s_mem))
#define SLAB_CHAINS (3)
static char *slab_chain_name_v1[] = {"full", "partial", "free"};
static void
do_slab_chain_percpu_v1(long cmd, struct meminfo *si)
{
int i, tmp, s;
int list_borked;
char *slab_s_buf;
ulong specified_slab;
ulong last;
ulong slab_chains[SLAB_CHAINS];
list_borked = 0;
si->slabsize = (power(2, si->order) * PAGESIZE());
si->cpucached_slab = 0;
if (VALID_MEMBER(kmem_cache_s_slabs)) {
slab_chains[0] = si->cache + OFFSET(kmem_cache_s_slabs);
slab_chains[1] = 0;
slab_chains[2] = 0;
} else {
slab_chains[0] = si->cache + OFFSET(kmem_cache_s_slabs_full);
slab_chains[1] = si->cache + OFFSET(kmem_cache_s_slabs_partial);
slab_chains[2] = si->cache + OFFSET(kmem_cache_s_slabs_free);
}
if (CRASHDEBUG(1)) {
fprintf(fp, "[ %s: %lx ", si->curname, si->cache);
fprintf(fp, "full: %lx partial: %lx free: %lx ]\n",
slab_chains[0], slab_chains[1], slab_chains[2]);
}
switch (cmd)
{
case SLAB_GET_COUNTS:
si->flags |= SLAB_GET_COUNTS;
si->flags &= ~SLAB_WALKTHROUGH;
si->cpucached_cache = 0;
si->num_slabs = si->inuse = 0;
gather_cpudata_list_v1(si);
slab_s_buf = GETBUF(SIZE(slab_s));
for (s = 0; s < SLAB_CHAINS; s++) {
if (!slab_chains[s])
continue;
if (!readmem(slab_chains[s],
KVADDR, &si->slab, sizeof(ulong),
"first slab", QUIET|RETURN_ON_ERROR)) {
error(INFO,
"%s: %s list: bad slab pointer: %lx\n",
si->curname, slab_chain_name_v1[s],
slab_chains[s]);
list_borked = 1;
continue;
}
if (slab_data_saved(si)) {
FREEBUF(slab_s_buf);
return;
}
if (si->slab == slab_chains[s])
continue;
last = slab_chains[s];
do {
if (received_SIGINT()) {
FREEBUF(slab_s_buf);
restart(0);
}
if (!verify_slab_v1(si, last, s)) {
list_borked = 1;
continue;
}
last = si->slab - OFFSET(slab_s_list);
readmem(si->slab, KVADDR, slab_s_buf,
SIZE(slab_s), "slab_s buffer",
FAULT_ON_ERROR);
tmp = INT(slab_s_buf + OFFSET(slab_s_inuse));
si->inuse += tmp;
if (ACTIVE())
gather_cpudata_list_v1(si);
si->s_mem = ULONG(slab_s_buf +
OFFSET(slab_s_s_mem));
gather_slab_cached_count(si);
si->num_slabs++;
si->slab = ULONG(slab_s_buf +
OFFSET(slab_s_list));
si->slab -= OFFSET(slab_s_list);
/*
* Check for slab transition. (Tony Dziedzic)
*/
for (i = 0; i < SLAB_CHAINS; i++) {
if ((i != s) &&
(si->slab == slab_chains[i])) {
error(NOTE,
"%s: slab chain inconsistency: %s list\n",
si->curname,
slab_chain_name_v1[s]);
list_borked = 1;
}
}
} while (si->slab != slab_chains[s] && !list_borked);
}
FREEBUF(slab_s_buf);
if (!list_borked)
save_slab_data(si);
break;
case SLAB_WALKTHROUGH:
specified_slab = si->slab;
si->flags |= SLAB_WALKTHROUGH;
si->flags &= ~SLAB_GET_COUNTS;
for (s = 0; s < SLAB_CHAINS; s++) {
if (!slab_chains[s])
continue;
if (!specified_slab) {
if (!readmem(slab_chains[s],
KVADDR, &si->slab, sizeof(ulong),
"slabs", QUIET|RETURN_ON_ERROR)) {
error(INFO,
"%s: %s list: bad slab pointer: %lx\n",
si->curname,
slab_chain_name_v1[s],
slab_chains[s]);
list_borked = 1;
continue;
}
last = slab_chains[s];
} else
last = 0;
if (si->slab == slab_chains[s])
continue;
if (CRASHDEBUG(1)) {
fprintf(fp, "search cache: [%s] ", si->curname);
if (si->flags & ADDRESS_SPECIFIED)
fprintf(fp, "for %llx", si->spec_addr);
fprintf(fp, "\n");
}
do {
if (received_SIGINT())
restart(0);
if (!verify_slab_v1(si, last, s)) {
list_borked = 1;
continue;
}
last = si->slab - OFFSET(slab_s_list);
dump_slab_percpu_v1(si);
if (si->found) {
return;
}
readmem(si->slab+OFFSET(slab_s_list),
KVADDR, &si->slab, sizeof(ulong),
"slab list", FAULT_ON_ERROR);
si->slab -= OFFSET(slab_s_list);
} while (si->slab != slab_chains[s] && !list_borked);
}
break;
}
}
/*
* Try to preclude any attempt to translate a bogus slab structure.
*/
static int
verify_slab_v1(struct meminfo *si, ulong last, int s)
{
char slab_s_buf[BUFSIZE];
struct kernel_list_head *list_head;
unsigned int inuse;
ulong s_mem;
char *list;
int errcnt;
list = slab_chain_name_v1[s];
errcnt = 0;
if (!readmem(si->slab, KVADDR, slab_s_buf,
SIZE(slab_s), "slab_s buffer", QUIET|RETURN_ON_ERROR)) {
error(INFO, "%s: %s list: bad slab pointer: %lx\n",
si->curname, list, si->slab);
return FALSE;
}
list_head = (struct kernel_list_head *)
(slab_s_buf + OFFSET(slab_s_list));
if (!IS_KVADDR((ulong)list_head->next) ||
!accessible((ulong)list_head->next)) {
error(INFO, "%s: %s list: slab: %lx bad next pointer: %lx\n",
si->curname, list, si->slab,
(ulong)list_head->next);
errcnt++;
}
if (last && (last != (ulong)list_head->prev)) {
error(INFO, "%s: %s list: slab: %lx bad prev pointer: %lx\n",
si->curname, list, si->slab,
(ulong)list_head->prev);
errcnt++;
}
inuse = UINT(slab_s_buf + OFFSET(slab_s_inuse));
if (inuse > si->c_num) {
error(INFO, "%s: %s list: slab: %lx bad inuse counter: %ld\n",
si->curname, list, si->slab, inuse);
errcnt++;
}
if (!last)
goto no_inuse_check_v1;
switch (s)
{
case 0: /* full -- but can be one singular list */
if (VALID_MEMBER(kmem_cache_s_slabs_full) &&
(inuse != si->c_num)) {
error(INFO,
"%s: %s list: slab: %lx bad inuse counter: %ld\n",
si->curname, list, si->slab, inuse);
errcnt++;
}
break;
case 1: /* partial */
if ((inuse == 0) || (inuse == si->c_num)) {
error(INFO,
"%s: %s list: slab: %lx bad inuse counter: %ld\n",
si->curname, list, si->slab, inuse);
errcnt++;
}
break;
case 2: /* free */
if (inuse > 0) {
error(INFO,
"%s: %s list: slab: %lx bad inuse counter: %ld\n",
si->curname, list, si->slab, inuse);
errcnt++;
}
break;
}
no_inuse_check_v1:
s_mem = ULONG(slab_s_buf + OFFSET(slab_s_s_mem));
if (!IS_KVADDR(s_mem) || !accessible(s_mem)) {
error(INFO, "%s: %s list: slab: %lx bad s_mem pointer: %lx\n",
si->curname, list, si->slab, s_mem);
errcnt++;
}
si->errors += errcnt;
return(errcnt ? FALSE : TRUE);
}
/*
* Updated for 2.6 slab substructure.
*/
static char *slab_chain_name_v2[] = {"partial", "full", "free"};
static void
do_slab_chain_percpu_v2(long cmd, struct meminfo *si)
{
int i, tmp, s;
int list_borked;
char *slab_buf;
ulong specified_slab;
ulong last;
ulong slab_chains[SLAB_CHAINS];
list_borked = 0;
si->slabsize = (power(2, si->order) * PAGESIZE());
si->cpucached_slab = 0;
slab_chains[0] = si->cache + OFFSET(kmem_cache_s_lists) +
OFFSET(kmem_list3_slabs_partial);
slab_chains[1] = si->cache + OFFSET(kmem_cache_s_lists) +
OFFSET(kmem_list3_slabs_full);
slab_chains[2] = si->cache + OFFSET(kmem_cache_s_lists) +
OFFSET(kmem_list3_slabs_free);
if (CRASHDEBUG(1)) {
fprintf(fp, "[ %s: %lx ", si->curname, si->cache);
fprintf(fp, "partial: %lx full: %lx free: %lx ]\n",
slab_chains[0], slab_chains[1], slab_chains[2]);
}
switch (cmd)
{
case SLAB_GET_COUNTS:
si->flags |= SLAB_GET_COUNTS;
si->flags &= ~SLAB_WALKTHROUGH;
si->cpucached_cache = 0;
si->num_slabs = si->inuse = 0;
gather_cpudata_list_v2(si);
slab_buf = GETBUF(SIZE(slab));
for (s = 0; s < SLAB_CHAINS; s++) {
if (!slab_chains[s])
continue;
if (!readmem(slab_chains[s],
KVADDR, &si->slab, sizeof(ulong),
"first slab", QUIET|RETURN_ON_ERROR)) {
error(INFO,
"%s: %s list: bad slab pointer: %lx\n",
si->curname,
slab_chain_name_v2[s],
slab_chains[s]);
list_borked = 1;
continue;
}
if (slab_data_saved(si)) {
FREEBUF(slab_buf);
return;
}
if (si->slab == slab_chains[s])
continue;
last = slab_chains[s];
do {
if (received_SIGINT()) {
FREEBUF(slab_buf);
restart(0);
}
if (!verify_slab_v2(si, last, s)) {
list_borked = 1;
continue;
}
last = si->slab - OFFSET(slab_list);
readmem(si->slab, KVADDR, slab_buf,
SIZE(slab), "slab buffer",
FAULT_ON_ERROR);
tmp = INT(slab_buf + OFFSET(slab_inuse));
si->inuse += tmp;
if (ACTIVE())
gather_cpudata_list_v2(si);
si->s_mem = ULONG(slab_buf +
OFFSET(slab_s_mem));
gather_slab_cached_count(si);
si->num_slabs++;
si->slab = ULONG(slab_buf +
OFFSET(slab_list));
si->slab -= OFFSET(slab_list);
/*
* Check for slab transition. (Tony Dziedzic)
*/
for (i = 0; i < SLAB_CHAINS; i++) {
if ((i != s) &&
(si->slab == slab_chains[i])) {
error(NOTE,
"%s: slab chain inconsistency: %s list\n",
si->curname,
slab_chain_name_v2[s]);
list_borked = 1;
}
}
} while (si->slab != slab_chains[s] && !list_borked);
}
FREEBUF(slab_buf);
if (!list_borked)
save_slab_data(si);
break;
case SLAB_WALKTHROUGH:
specified_slab = si->slab;
si->flags |= SLAB_WALKTHROUGH;
si->flags &= ~SLAB_GET_COUNTS;
for (s = 0; s < SLAB_CHAINS; s++) {
if (!slab_chains[s])
continue;
if (!specified_slab) {
if (!readmem(slab_chains[s],
KVADDR, &si->slab, sizeof(ulong),
"slabs", QUIET|RETURN_ON_ERROR)) {
error(INFO,
"%s: %s list: bad slab pointer: %lx\n",
si->curname,
slab_chain_name_v2[s],
slab_chains[s]);
list_borked = 1;
continue;
}
last = slab_chains[s];
} else
last = 0;
if (si->slab == slab_chains[s])
continue;
if (CRASHDEBUG(1)) {
fprintf(fp, "search cache: [%s] ", si->curname);
if (si->flags & ADDRESS_SPECIFIED)
fprintf(fp, "for %llx", si->spec_addr);
fprintf(fp, "\n");
}
do {
if (received_SIGINT())
restart(0);
if (!verify_slab_v2(si, last, s)) {
list_borked = 1;
continue;
}
last = si->slab - OFFSET(slab_list);
dump_slab_percpu_v2(si);
if (si->found) {
return;
}
readmem(si->slab+OFFSET(slab_list),
KVADDR, &si->slab, sizeof(ulong),
"slab list", FAULT_ON_ERROR);
si->slab -= OFFSET(slab_list);
} while (si->slab != slab_chains[s] && !list_borked);
}
break;
}
}
/*
* Added To Traverse the Nodelists
*/
static void
do_slab_chain_percpu_v2_nodes(long cmd, struct meminfo *si)
{
int i, tmp, s, node;
int list_borked;
char *slab_buf;
ulong specified_slab;
ulong last;
ulong slab_chains[SLAB_CHAINS];
ulong *start_address;
int index;
list_borked = 0;
slab_buf = NULL;
si->slabsize = (power(2, si->order) * PAGESIZE());
si->cpucached_slab = 0;
start_address = (ulong *)GETBUF(sizeof(ulong) * vt->kmem_cache_len_nodes);
if (!readmem(kmem_cache_nodelists(si->cache), KVADDR,
&start_address[0], sizeof(ulong) * vt->kmem_cache_len_nodes,
"array nodelist array", RETURN_ON_ERROR))
error(INFO, "cannot read kmem_cache nodelists array");
switch (cmd)
{
case SLAB_GET_COUNTS:
si->flags |= (SLAB_GET_COUNTS|SLAB_FIRST_NODE);
si->flags &= ~SLAB_WALKTHROUGH;
si->cpucached_cache = 0;
si->num_slabs = si->inuse = 0;
slab_buf = GETBUF(SIZE(slab));
for (index = 0; (index < vt->kmem_cache_len_nodes); index++)
{
if (vt->flags & NODES_ONLINE) {
node = next_online_node(index);
if (node < 0)
break;
if (node != index)
continue;
}
if (start_address[index] == 0)
continue;
slab_chains[0] = start_address[index] + OFFSET(kmem_list3_slabs_partial);
slab_chains[1] = start_address[index] + OFFSET(kmem_list3_slabs_full);
slab_chains[2] = start_address[index] + OFFSET(kmem_list3_slabs_free);
gather_cpudata_list_v2_nodes(si, index);
si->flags &= ~SLAB_FIRST_NODE;
if (CRASHDEBUG(1)) {
fprintf(fp, "[ %s: %lx ", si->curname, si->cache);
fprintf(fp, "partial: %lx full: %lx free: %lx ]\n",
slab_chains[0], slab_chains[1], slab_chains[2]);
}
for (s = 0; s < SLAB_CHAINS; s++) {
if (!slab_chains[s])
continue;
if (!readmem(slab_chains[s],
KVADDR, &si->slab, sizeof(ulong),
"first slab", QUIET|RETURN_ON_ERROR)) {
error(INFO,
"%s: %s list: bad slab pointer: %lx\n",
si->curname,
slab_chain_name_v2[s],
slab_chains[s]);
list_borked = 1;
continue;
}
if (slab_data_saved(si)) {
FREEBUF(slab_buf);
FREEBUF(start_address);
return;
}
if (si->slab == slab_chains[s])
continue;
last = slab_chains[s];
do {
if (received_SIGINT()) {
FREEBUF(slab_buf);
FREEBUF(start_address);
restart(0);
}
if (!verify_slab_v2(si, last, s)) {
list_borked = 1;
continue;
}
last = si->slab - OFFSET(slab_list);
readmem(si->slab, KVADDR, slab_buf,
SIZE(slab), "slab buffer",
FAULT_ON_ERROR);
tmp = INT(slab_buf + OFFSET(slab_inuse));
si->inuse += tmp;
si->s_mem = ULONG(slab_buf +
OFFSET(slab_s_mem));
gather_slab_cached_count(si);
si->num_slabs++;
si->slab = ULONG(slab_buf +
OFFSET(slab_list));
si->slab -= OFFSET(slab_list);
/*
* Check for slab transition. (Tony Dziedzic)
*/
for (i = 0; i < SLAB_CHAINS; i++) {
if ((i != s) &&
(si->slab == slab_chains[i])) {
error(NOTE,
"%s: slab chain inconsistency: %s list\n",
si->curname,
slab_chain_name_v2[s]);
list_borked = 1;
}
}
} while (si->slab != slab_chains[s] && !list_borked);
}
}
if (!list_borked)
save_slab_data(si);
break;
case SLAB_WALKTHROUGH:
specified_slab = si->slab;
si->flags |= (SLAB_WALKTHROUGH|SLAB_FIRST_NODE);
si->flags &= ~SLAB_GET_COUNTS;
slab_buf = GETBUF(SIZE(slab));
for (index = 0; (index < vt->kmem_cache_len_nodes); index++)
{
if (vt->flags & NODES_ONLINE) {
node = next_online_node(index);
if (node < 0)
break;
if (node != index)
continue;
}
if (start_address[index] == 0)
continue;
slab_chains[0] = start_address[index] + OFFSET(kmem_list3_slabs_partial);
slab_chains[1] = start_address[index] + OFFSET(kmem_list3_slabs_full);
slab_chains[2] = start_address[index] + OFFSET(kmem_list3_slabs_free);
gather_cpudata_list_v2_nodes(si, index);
si->flags &= ~SLAB_FIRST_NODE;
if (CRASHDEBUG(1)) {
fprintf(fp, "[ %s: %lx ", si->curname, si->cache);
fprintf(fp, "partial: %lx full: %lx free: %lx ]\n",
slab_chains[0], slab_chains[1], slab_chains[2]);
}
for (s = 0; s < SLAB_CHAINS; s++) {
if (!slab_chains[s])
continue;
if (!specified_slab) {
if (!readmem(slab_chains[s],
KVADDR, &si->slab, sizeof(ulong),
"slabs", QUIET|RETURN_ON_ERROR)) {
error(INFO, "%s: %s list: "
"bad slab pointer: %lx\n",
si->curname,
slab_chain_name_v2[s],
slab_chains[s]);
list_borked = 1;
continue;
}
last = slab_chains[s];
} else
last = 0;
if (si->slab == slab_chains[s])
continue;
readmem(si->slab, KVADDR, slab_buf,
SIZE(slab), "slab buffer",
FAULT_ON_ERROR);
si->s_mem = ULONG(slab_buf +
OFFSET(slab_s_mem));
if (CRASHDEBUG(1)) {
fprintf(fp, "search cache: [%s] ", si->curname);
if (si->flags & ADDRESS_SPECIFIED)
fprintf(fp, "for %llx", si->spec_addr);
fprintf(fp, "\n");
}
do {
if (received_SIGINT())
{
FREEBUF(start_address);
FREEBUF(slab_buf);
restart(0);
}
if (!verify_slab_v2(si, last, s)) {
list_borked = 1;
continue;
}
last = si->slab - OFFSET(slab_list);
dump_slab_percpu_v2(si);
if (si->found) {
FREEBUF(start_address);
FREEBUF(slab_buf);
return;
}
readmem(si->slab+OFFSET(slab_list),
KVADDR, &si->slab, sizeof(ulong),
"slab list", FAULT_ON_ERROR);
si->slab -= OFFSET(slab_list);
} while (si->slab != slab_chains[s] && !list_borked);
}
}
break;
}
FREEBUF(slab_buf);
FREEBUF(start_address);
}
static int
slab_freelist_index_size(void)
{
struct datatype_member datatype, *dm;
dm = &datatype;
BZERO(dm, sizeof(*dm));
dm->name = "freelist_idx_t";
if (is_typedef(dm->name))
return DATATYPE_SIZE(dm);
if (CRASHDEBUG(1))
error(INFO, "freelist_idx_t does not exist\n");
return sizeof(int);
}
static void
do_slab_chain_slab_overload_page(long cmd, struct meminfo *si)
{
int i, tmp, s, node;
int list_borked;
char *page_buf;
ulong specified_slab;
ulong last;
ulong slab_chains[SLAB_CHAINS];
ulong *start_address;
int index;
list_borked = 0;
page_buf = NULL;
si->slabsize = (power(2, si->order) * PAGESIZE());
si->cpucached_slab = 0;
start_address = (ulong *)GETBUF(sizeof(ulong) * vt->kmem_cache_len_nodes);
if (!readmem(kmem_cache_nodelists(si->cache), KVADDR,
&start_address[0], sizeof(ulong) * vt->kmem_cache_len_nodes,
"array nodelist array", RETURN_ON_ERROR))
error(INFO, "cannot read kmem_cache nodelists array");
switch (cmd)
{
case SLAB_GET_COUNTS:
si->flags |= (SLAB_GET_COUNTS|SLAB_FIRST_NODE);
si->flags &= ~SLAB_WALKTHROUGH;
si->cpucached_cache = 0;
si->num_slabs = si->inuse = 0;
page_buf = GETBUF(SIZE(page));
for (index = 0; (index < vt->kmem_cache_len_nodes); index++)
{
if (vt->flags & NODES_ONLINE) {
node = next_online_node(index);
if (node < 0)
break;
if (node != index)
continue;
}
if (start_address[index] == 0)
continue;
slab_chains[0] = start_address[index] + OFFSET(kmem_list3_slabs_partial);
slab_chains[1] = start_address[index] + OFFSET(kmem_list3_slabs_full);
slab_chains[2] = start_address[index] + OFFSET(kmem_list3_slabs_free);
gather_cpudata_list_v2_nodes(si, index);
si->flags &= ~SLAB_FIRST_NODE;
if (CRASHDEBUG(1)) {
fprintf(fp, "[ %s: %lx ", si->curname, si->cache);
fprintf(fp, "partial: %lx full: %lx free: %lx ]\n",
slab_chains[0], slab_chains[1], slab_chains[2]);
}
for (s = 0; s < SLAB_CHAINS; s++) {
if (!slab_chains[s])
continue;
if (!readmem(slab_chains[s],
KVADDR, &si->slab, sizeof(ulong),
"first slab", QUIET|RETURN_ON_ERROR)) {
error(INFO,
"%s: %s list: bad page/slab pointer: %lx\n",
si->curname,
slab_chain_name_v2[s],
slab_chains[s]);
list_borked = 1;
continue;
}
if (slab_data_saved(si)) {
FREEBUF(page_buf);
FREEBUF(start_address);
return;
}
if (si->slab == slab_chains[s])
continue;
last = slab_chains[s];
do {
if (received_SIGINT()) {
FREEBUF(page_buf);
FREEBUF(start_address);
restart(0);
}
if (!verify_slab_overload_page(si, last, s)) {
list_borked = 1;
continue;
}
last = si->slab;
readmem(si->slab - OFFSET(page_lru), KVADDR, page_buf,
SIZE(page), "page (slab) buffer",
FAULT_ON_ERROR);
tmp = INT(page_buf + OFFSET(page_active));
si->inuse += tmp;
si->s_mem = ULONG(page_buf +
OFFSET(page_s_mem));
gather_slab_cached_count(si);
si->num_slabs++;
si->slab = ULONG(page_buf +
OFFSET(page_lru));
/*
* Check for slab transition. (Tony Dziedzic)
*/
for (i = 0; i < SLAB_CHAINS; i++) {
if ((i != s) &&
(si->slab == slab_chains[i])) {
error(NOTE,
"%s: slab chain inconsistency: %s list\n",
si->curname,
slab_chain_name_v2[s]);
list_borked = 1;
}
}
} while (si->slab != slab_chains[s] && !list_borked);
}
}
if (!list_borked)
save_slab_data(si);
break;
case SLAB_WALKTHROUGH:
if (si->flags & SLAB_OVERLOAD_PAGE_PTR) {
specified_slab = si->spec_addr;
si->slab = si->spec_addr + OFFSET(page_lru);
} else {
specified_slab = si->slab;
if (si->slab)
si->slab += OFFSET(page_lru);
}
si->flags |= (SLAB_WALKTHROUGH|SLAB_FIRST_NODE);
si->flags &= ~SLAB_GET_COUNTS;
page_buf = GETBUF(SIZE(page));
for (index = 0; (index < vt->kmem_cache_len_nodes); index++)
{
if (vt->flags & NODES_ONLINE) {
node = next_online_node(index);
if (node < 0)
break;
if (node != index)
continue;
}
if (start_address[index] == 0)
continue;
slab_chains[0] = start_address[index] + OFFSET(kmem_list3_slabs_partial);
slab_chains[1] = start_address[index] + OFFSET(kmem_list3_slabs_full);
slab_chains[2] = start_address[index] + OFFSET(kmem_list3_slabs_free);
gather_cpudata_list_v2_nodes(si, index);
si->flags &= ~SLAB_FIRST_NODE;
if (CRASHDEBUG(1)) {
fprintf(fp, "[ %s: %lx ", si->curname, si->cache);
fprintf(fp, "partial: %lx full: %lx free: %lx ]\n",
slab_chains[0], slab_chains[1], slab_chains[2]);
}
for (s = 0; s < SLAB_CHAINS; s++) {
if (!slab_chains[s])
continue;
if (!specified_slab) {
if (!readmem(slab_chains[s],
KVADDR, &si->slab, sizeof(ulong),
"slabs", QUIET|RETURN_ON_ERROR)) {
error(INFO, "%s: %s list: "
"bad page/slab pointer: %lx\n",
si->curname,
slab_chain_name_v2[s],
slab_chains[s]);
list_borked = 1;
continue;
}
last = slab_chains[s];
} else
last = 0;
if (si->slab == slab_chains[s])
continue;
readmem(si->slab - OFFSET(page_lru), KVADDR, page_buf,
SIZE(page), "page (slab) buffer",
FAULT_ON_ERROR);
si->s_mem = ULONG(page_buf +
OFFSET(page_s_mem));
if (CRASHDEBUG(1)) {
fprintf(fp, "search cache: [%s] ", si->curname);
if (si->flags & ADDRESS_SPECIFIED)
fprintf(fp, "for %llx", si->spec_addr);
fprintf(fp, "\n");
}
do {
if (received_SIGINT())
{
FREEBUF(start_address);
FREEBUF(page_buf);
restart(0);
}
if (!verify_slab_overload_page(si, last, s)) {
list_borked = 1;
continue;
}
last = si->slab;
dump_slab_overload_page(si);
if (si->found) {
FREEBUF(start_address);
FREEBUF(page_buf);
return;
}
readmem(si->slab, KVADDR, &si->slab,
sizeof(ulong), "slab list",
FAULT_ON_ERROR);
} while (si->slab != slab_chains[s] && !list_borked);
}
}
break;
}
FREEBUF(page_buf);
FREEBUF(start_address);
}
/*
* Try to preclude any attempt to translate a bogus slab structure.
*/
static int
verify_slab_v2(struct meminfo *si, ulong last, int s)
{
char slab_buf[BUFSIZE];
struct kernel_list_head *list_head;
unsigned int inuse;
ulong s_mem;
char *list;
int errcnt;
list = slab_chain_name_v2[s];
errcnt = 0;
if (!readmem(si->slab, KVADDR, slab_buf,
SIZE(slab), "slab buffer", QUIET|RETURN_ON_ERROR)) {
error(INFO, "%s: %s list: bad slab pointer: %lx\n",
si->curname, list, si->slab);
return FALSE;
}
list_head = (struct kernel_list_head *)(slab_buf + OFFSET(slab_list));
if (!IS_KVADDR((ulong)list_head->next) ||
!accessible((ulong)list_head->next)) {
error(INFO, "%s: %s list: slab: %lx bad next pointer: %lx\n",
si->curname, list, si->slab,
(ulong)list_head->next);
errcnt++;
}
if (last && (last != (ulong)list_head->prev)) {
error(INFO, "%s: %s list: slab: %lx bad prev pointer: %lx\n",
si->curname, list, si->slab,
(ulong)list_head->prev);
errcnt++;
}
inuse = UINT(slab_buf + OFFSET(slab_inuse));
if (inuse > si->c_num) {
error(INFO, "%s: %s list: slab: %lx bad inuse counter: %ld\n",
si->curname, list, si->slab, inuse);
errcnt++;
}
if (!last)
goto no_inuse_check_v2;
switch (s)
{
case 0: /* partial */
if ((inuse == 0) || (inuse == si->c_num)) {
error(INFO,
"%s: %s list: slab: %lx bad inuse counter: %ld\n",
si->curname, list, si->slab, inuse);
errcnt++;
}
break;
case 1: /* full */
if (inuse != si->c_num) {
error(INFO,
"%s: %s list: slab: %lx bad inuse counter: %ld\n",
si->curname, list, si->slab, inuse);
errcnt++;
}
break;
case 2: /* free */
if (inuse > 0) {
error(INFO,
"%s: %s list: slab: %lx bad inuse counter: %ld\n",
si->curname, list, si->slab, inuse);
errcnt++;
}
break;
}
no_inuse_check_v2:
s_mem = ULONG(slab_buf + OFFSET(slab_s_mem));
if (!IS_KVADDR(s_mem) || !accessible(s_mem)) {
error(INFO, "%s: %s list: slab: %lx bad s_mem pointer: %lx\n",
si->curname, list, si->slab, s_mem);
errcnt++;
}
si->errors += errcnt;
return(errcnt ? FALSE : TRUE);
}
static int
verify_slab_overload_page(struct meminfo *si, ulong last, int s)
{
char *page_buf;
struct kernel_list_head *list_head;
unsigned int active;
ulong s_mem;
char *list;
int errcnt;
list = slab_chain_name_v2[s];
page_buf = GETBUF(SIZE(page));
errcnt = 0;
if (!readmem(si->slab - OFFSET(page_lru), KVADDR, page_buf,
SIZE(page), "page (slab) buffer", QUIET|RETURN_ON_ERROR)) {
error(INFO, "%s: %s list: bad slab pointer: %lx\n",
si->curname, list, si->slab);
FREEBUF(page_buf);
return FALSE;
}
list_head = (struct kernel_list_head *)(page_buf + OFFSET(page_lru));
if (!IS_KVADDR((ulong)list_head->next) ||
!accessible((ulong)list_head->next)) {
error(INFO, "%s: %s list: page/slab: %lx bad next pointer: %lx\n",
si->curname, list, si->slab,
(ulong)list_head->next);
errcnt++;
}
if (last && (last != (ulong)list_head->prev)) {
error(INFO, "%s: %s list: page/slab: %lx bad prev pointer: %lx\n",
si->curname, list, si->slab,
(ulong)list_head->prev);
errcnt++;
}
active = UINT(page_buf + OFFSET(page_active));
if (active > si->c_num) {
error(INFO, "%s: %s list: page/slab: %lx bad active counter: %ld\n",
si->curname, list, si->slab, active);
errcnt++;
}
if (!last)
goto no_inuse_check_v2;
switch (s)
{
case 0: /* partial */
if ((active == 0) || (active == si->c_num)) {
error(INFO,
"%s: %s list: page/slab: %lx bad active counter: %ld\n",
si->curname, list, si->slab, active);
errcnt++;
}
break;
case 1: /* full */
if (active != si->c_num) {
error(INFO,
"%s: %s list: page/slab: %lx bad active counter: %ld\n",
si->curname, list, si->slab, active);
errcnt++;
}
break;
case 2: /* free */
if (active > 0) {
error(INFO,
"%s: %s list: page/slab: %lx bad active counter: %ld\n",
si->curname, list, si->slab, active);
errcnt++;
}
break;
}
no_inuse_check_v2:
s_mem = ULONG(page_buf + OFFSET(page_s_mem));
if (!IS_KVADDR(s_mem) || !accessible(s_mem)) {
error(INFO, "%s: %s list: page/slab: %lx bad s_mem pointer: %lx\n",
si->curname, list, si->slab, s_mem);
errcnt++;
}
si->errors += errcnt;
FREEBUF(page_buf);
return(errcnt ? FALSE : TRUE);
}
/*
* If it's a dumpfile, save the essential slab data to avoid re-reading
* the whole slab chain more than once. This may seem like overkill, but
* if the problem is a memory leak, or just the over-use of the buffer_head
* cache, it's painful to wait each time subsequent kmem -s or -i commands
* simply need the basic slab counts.
*/
struct slab_data {
ulong cache_addr;
int num_slabs;
int inuse;
ulong cpucached_cache;
};
#define NO_SLAB_DATA ((void *)(-1))
static void
save_slab_data(struct meminfo *si)
{
int i;
if (si->flags & SLAB_DATA_NOSAVE) {
si->flags &= ~SLAB_DATA_NOSAVE;
return;
}
if (ACTIVE())
return;
if (vt->slab_data == NO_SLAB_DATA)
return;
if (!vt->slab_data) {
if (!(vt->slab_data = (struct slab_data *)
malloc(sizeof(struct slab_data) * vt->kmem_cache_count))) {
error(INFO, "cannot malloc slab_data table");
vt->slab_data = NO_SLAB_DATA;
return;
}
for (i = 0; i < vt->kmem_cache_count; i++) {
vt->slab_data[i].cache_addr = (ulong)NO_SLAB_DATA;
vt->slab_data[i].num_slabs = 0;
vt->slab_data[i].inuse = 0;
vt->slab_data[i].cpucached_cache = 0;
}
}
for (i = 0; i < vt->kmem_cache_count; i++) {
if (vt->slab_data[i].cache_addr == si->cache)
break;
if (vt->slab_data[i].cache_addr == (ulong)NO_SLAB_DATA) {
vt->slab_data[i].cache_addr = si->cache;
vt->slab_data[i].num_slabs = si->num_slabs;
vt->slab_data[i].inuse = si->inuse;
vt->slab_data[i].cpucached_cache = si->cpucached_cache;
break;
}
}
}
static int
slab_data_saved(struct meminfo *si)
{
int i;
if (ACTIVE() || !vt->slab_data || (vt->slab_data == NO_SLAB_DATA))
return FALSE;
for (i = 0; i < vt->kmem_cache_count; i++) {
if (vt->slab_data[i].cache_addr == si->cache) {
si->inuse = vt->slab_data[i].inuse;
si->num_slabs = vt->slab_data[i].num_slabs;
si->cpucached_cache = vt->slab_data[i].cpucached_cache;
return TRUE;
}
}
return FALSE;
}
static void
dump_saved_slab_data(void)
{
int i;
if (!vt->slab_data || (vt->slab_data == NO_SLAB_DATA))
return;
for (i = 0; i < vt->kmem_cache_count; i++) {
if (vt->slab_data[i].cache_addr == (ulong)NO_SLAB_DATA)
break;
fprintf(fp,
" cache: %lx inuse: %5d num_slabs: %3d cpucached_cache: %ld\n",
vt->slab_data[i].cache_addr,
vt->slab_data[i].inuse,
vt->slab_data[i].num_slabs,
vt->slab_data[i].cpucached_cache);
}
}
/*
* Dump the contents of a kmem slab.
*/
static void
dump_slab(struct meminfo *si)
{
si->s_mem = ULONG(si->slab_buf + OFFSET(kmem_slab_s_s_mem));
si->s_mem = PTOB(BTOP(si->s_mem));
if (si->flags & ADDRESS_SPECIFIED) {
if (INSLAB(si->slab, si) && (si->spec_addr >= si->slab) &&
(si->spec_addr < (si->slab+SIZE(kmem_slab_s)))) {
si->found = KMEM_SLAB_ADDR;
return;
}
if (INSLAB(si->spec_addr, si))
si->found = KMEM_ON_SLAB; /* But don't return yet... */
else
return;
}
si->s_freep = VOID_PTR(si->slab_buf + OFFSET(kmem_slab_s_s_freep));
si->s_inuse = ULONG(si->slab_buf + OFFSET(kmem_slab_s_s_inuse));
si->s_index = ULONG_PTR(si->slab_buf + OFFSET(kmem_slab_s_s_index));
if (!(si->flags & ADDRESS_SPECIFIED)) {
fprintf(fp, "%s", slab_hdr);
DUMP_SLAB_INFO();
}
dump_slab_objects(si);
}
/*
* dump_slab() adapted for newer percpu slab format.
*/
static void
dump_slab_percpu_v1(struct meminfo *si)
{
int tmp;
readmem(si->slab+OFFSET(slab_s_s_mem),
KVADDR, &si->s_mem, sizeof(ulong),
"s_mem", FAULT_ON_ERROR);
/*
* Include the array of kmem_bufctl_t's appended to slab.
*/
tmp = SIZE(slab_s) + (SIZE(kmem_bufctl_t) * si->c_num);
if (si->flags & ADDRESS_SPECIFIED) {
if (INSLAB_PERCPU(si->slab, si) &&
(si->spec_addr >= si->slab) &&
(si->spec_addr < (si->slab+tmp))) {
if (si->spec_addr >= (si->slab + SIZE(slab_s)))
si->found = KMEM_BUFCTL_ADDR;
else
si->found = KMEM_SLAB_ADDR;
} else if (INSLAB_PERCPU(si->spec_addr, si))
si->found = KMEM_ON_SLAB; /* But don't return yet... */
else
return;
}
readmem(si->slab+OFFSET(slab_s_inuse),
KVADDR, &tmp, sizeof(int),
"inuse", FAULT_ON_ERROR);
si->s_inuse = tmp;
readmem(si->slab+OFFSET(slab_s_free),
KVADDR, &si->free, SIZE(kmem_bufctl_t),
"kmem_bufctl_t", FAULT_ON_ERROR);
gather_slab_free_list_percpu(si);
gather_slab_cached_count(si);
if (!(si->flags & ADDRESS_SPECIFIED)) {
fprintf(fp, "%s", slab_hdr);
DUMP_SLAB_INFO();
}
dump_slab_objects_percpu(si);
}
/*
* Updated for 2.6 slab substructure.
*/
static void
dump_slab_percpu_v2(struct meminfo *si)
{
int tmp;
readmem(si->slab+OFFSET(slab_s_mem),
KVADDR, &si->s_mem, sizeof(ulong),
"s_mem", FAULT_ON_ERROR);
/*
* Include the array of kmem_bufctl_t's appended to slab.
*/
tmp = SIZE(slab) + (SIZE(kmem_bufctl_t) * si->c_num);
if (si->flags & ADDRESS_SPECIFIED) {
if (INSLAB_PERCPU(si->slab, si) &&
(si->spec_addr >= si->slab) &&
(si->spec_addr < (si->slab+tmp))) {
if (si->spec_addr >= (si->slab + SIZE(slab)))
si->found = KMEM_BUFCTL_ADDR;
else
si->found = KMEM_SLAB_ADDR;
} else if (INSLAB_PERCPU(si->spec_addr, si))
si->found = KMEM_ON_SLAB; /* But don't return yet... */
else
return;
}
readmem(si->slab+OFFSET(slab_inuse),
KVADDR, &tmp, sizeof(int),
"inuse", FAULT_ON_ERROR);
si->s_inuse = tmp;
readmem(si->slab+OFFSET(slab_free),
KVADDR, &si->free, SIZE(kmem_bufctl_t),
"kmem_bufctl_t", FAULT_ON_ERROR);
gather_slab_free_list_percpu(si);
gather_slab_cached_count(si);
if (!(si->flags & ADDRESS_SPECIFIED)) {
fprintf(fp, "%s", slab_hdr);
DUMP_SLAB_INFO();
}
dump_slab_objects_percpu(si);
}
static void
dump_slab_overload_page(struct meminfo *si)
{
int tmp;
ulong slab_overload_page, freelist;
slab_overload_page = si->slab - OFFSET(page_lru);
readmem(slab_overload_page + OFFSET(page_s_mem),
KVADDR, &si->s_mem, sizeof(ulong),
"page.s_mem", FAULT_ON_ERROR);
readmem(slab_overload_page + OFFSET(page_freelist),
KVADDR, &freelist, sizeof(ulong),
"page.freelist", FAULT_ON_ERROR);
if (si->flags & ADDRESS_SPECIFIED) {
if ((si->spec_addr >= slab_overload_page) &&
(si->spec_addr < (slab_overload_page+SIZE(page)))) {
si->found = KMEM_SLAB_OVERLOAD_PAGE;
} else if (INSLAB_PERCPU(si->spec_addr, si))
si->found = KMEM_ON_SLAB; /* But don't return yet... */
else
return;
}
readmem(slab_overload_page + OFFSET(page_active),
KVADDR, &tmp, sizeof(int),
"active", FAULT_ON_ERROR);
si->s_inuse = tmp;
gather_slab_free_list_slab_overload_page(si);
gather_slab_cached_count(si);
if (!(si->flags & ADDRESS_SPECIFIED)) {
fprintf(fp, "%s", slab_hdr);
DUMP_SLAB_INFO();
}
dump_slab_objects_percpu(si);
}
/*
* Gather the free objects in a slab into the si->addrlist, checking for
* specified addresses that are in-slab kmem_bufctls, and making error checks
* along the way. Object address checks are deferred to dump_slab_objects().
*/
#define INOBJECT(addr, obj) ((addr >= obj) && (addr < (obj+si->size)))
static void
gather_slab_free_list(struct meminfo *si)
{
ulong *next, obj;
ulong expected, cnt;
BNEG(si->addrlist, sizeof(ulong) * (si->c_num+1));
if (!si->s_freep)
return;
cnt = 0;
expected = si->c_num - si->s_inuse;
next = si->s_freep;
do {
if (cnt == si->c_num) {
error(INFO,
"\"%s\" cache: too many objects found in slab free list\n",
si->curname);
si->errors++;
return;
}
/*
* Off-slab kmem_bufctls are contained in arrays of object
* pointers that point to:
* 1. next kmem_bufctl (or NULL) if the object is free.
* 2. to the object if it the object is in use.
*
* On-slab kmem_bufctls resides just after the object itself,
* and point to:
* 1. next kmem_bufctl (or NULL) if object is free.
* 2. the containing slab if the object is in use.
*/
if (si->c_flags & SLAB_CFLGS_BUFCTL)
obj = si->s_mem + ((next - si->s_index) * si->c_offset);
else
obj = (ulong)next - si->c_offset;
si->addrlist[cnt] = obj;
if (si->flags & ADDRESS_SPECIFIED) {
if (INSLAB(next, si) &&
(si->spec_addr >= (ulong)next) &&
(si->spec_addr < (ulong)(next + 1))) {
si->found = KMEM_BUFCTL_ADDR;
return;
}
}
cnt++;
if (!INSLAB(obj, si)) {
error(INFO,
"\"%s\" cache: address not contained within slab: %lx\n",
si->curname, obj);
si->errors++;
}
readmem((ulong)next, KVADDR, &next, sizeof(void *),
"s_freep chain entry", FAULT_ON_ERROR);
} while (next);
if (cnt != expected) {
error(INFO,
"\"%s\" cache: free object mismatch: expected: %ld found: %ld\n",
si->curname, expected, cnt);
si->errors++;
}
}
/*
* gather_slab_free_list() adapted for newer percpu slab format.
*/
#define BUFCTL_END 0xffffFFFF
static void
gather_slab_free_list_percpu(struct meminfo *si)
{
int i;
ulong obj;
ulong expected, cnt;
int free_index;
ulong kmembp;
short *kbp;
BNEG(si->addrlist, sizeof(ulong) * (si->c_num+1));
if (CRASHDEBUG(1))
fprintf(fp, "slab: %lx si->s_inuse: %ld si->c_num: %ld\n",
si->slab, si->s_inuse, si->c_num);
if (si->s_inuse == si->c_num )
return;
kmembp = si->slab + SIZE_OPTION(slab_s, slab);
readmem((ulong)kmembp, KVADDR, si->kmem_bufctl,
SIZE(kmem_bufctl_t) * si->c_num,
"kmem_bufctl array", FAULT_ON_ERROR);
if (CRASHDEBUG(1)) {
for (i = 0; (SIZE(kmem_bufctl_t) == sizeof(int)) &&
(i < si->c_num); i++)
fprintf(fp, "%d ", si->kmem_bufctl[i]);
for (kbp = (short *)&si->kmem_bufctl[0], i = 0;
(SIZE(kmem_bufctl_t) == sizeof(short)) && (i < si->c_num);
i++)
fprintf(fp, "%d ", *(kbp + i));
fprintf(fp, "\n");
}
cnt = 0;
expected = si->c_num - si->s_inuse;
if (SIZE(kmem_bufctl_t) == sizeof(int)) {
for (free_index = si->free; free_index != BUFCTL_END;
free_index = si->kmem_bufctl[free_index]) {
if (cnt == si->c_num) {
error(INFO,
"\"%s\" cache: too many objects found in slab free list\n",
si->curname);
si->errors++;
return;
}
obj = si->s_mem + (free_index*si->size);
si->addrlist[cnt] = obj;
cnt++;
}
} else if (SIZE(kmem_bufctl_t) == sizeof(short)) {
kbp = (short *)&si->kmem_bufctl[0];
for (free_index = si->free; free_index != BUFCTL_END;
free_index = (int)*(kbp + free_index)) {
if (cnt == si->c_num) {
error(INFO,
"\"%s\" cache: too many objects found in slab free list\n",
si->curname);
si->errors++;
return;
}
obj = si->s_mem + (free_index*si->size);
si->addrlist[cnt] = obj;
cnt++;
}
} else
error(FATAL,
"size of kmem_bufctl_t (%d) not sizeof(int) or sizeof(short)\n",
SIZE(kmem_bufctl_t));
if (cnt != expected) {
error(INFO,
"\"%s\" cache: free object mismatch: expected: %ld found: %ld\n",
si->curname, expected, cnt);
si->errors++;
}
}
static void
gather_slab_free_list_slab_overload_page(struct meminfo *si)
{
int i, active;
ulong obj, objnr, cnt, freelist;
unsigned char *ucharptr;
unsigned short *ushortptr;
unsigned int *uintptr;
if (CRASHDEBUG(1))
fprintf(fp, "slab page: %lx active: %ld si->c_num: %ld\n",
si->slab - OFFSET(page_lru), si->s_inuse, si->c_num);
if (si->s_inuse == si->c_num )
return;
readmem(si->slab - OFFSET(page_lru) + OFFSET(page_freelist),
KVADDR, &freelist, sizeof(void *), "page freelist",
FAULT_ON_ERROR);
readmem(freelist, KVADDR, si->freelist,
si->freelist_index_size * si->c_num,
"freelist array", FAULT_ON_ERROR);
BNEG(si->addrlist, sizeof(ulong) * (si->c_num+1));
cnt = objnr = 0;
ucharptr = NULL;
ushortptr = NULL;
uintptr = NULL;
active = si->s_inuse;
switch (si->freelist_index_size)
{
case 1: ucharptr = (unsigned char *)si->freelist; break;
case 2: ushortptr = (unsigned short *)si->freelist; break;
case 4: uintptr = (unsigned int *)si->freelist; break;
}
for (i = 0; i < si->c_num; i++) {
switch (si->freelist_index_size)
{
case 1: objnr = (ulong)*ucharptr++; break;
case 2: objnr = (ulong)*ushortptr++; break;
case 4: objnr = (ulong)*uintptr++; break;
}
if (objnr >= si->c_num) {
error(INFO,
"\"%s\" cache: invalid/corrupt freelist entry: %ld\n",
si->curname, objnr);
si->errors++;
}
if (i >= active) {
obj = si->s_mem + (objnr * si->size);
si->addrlist[cnt++] = obj;
if (CRASHDEBUG(1))
fprintf(fp, "%ld ", objnr);
} else if (CRASHDEBUG(1))
fprintf(fp, "[%ld] ", objnr);
}
if (CRASHDEBUG(1))
fprintf(fp, "\n");
}
/*
* Dump the FREE, [ALLOCATED] and <CACHED> objects of a slab.
*/
#define DUMP_SLAB_OBJECT() \
for (j = on_free_list = 0; j < si->c_num; j++) { \
if (obj == si->addrlist[j]) { \
on_free_list = TRUE; \
break; \
} \
} \
\
if (on_free_list) { \
if (!(si->flags & ADDRESS_SPECIFIED)) \
fprintf(fp, " %lx\n", obj); \
if (si->flags & ADDRESS_SPECIFIED) { \
if (INOBJECT(si->spec_addr, obj)) { \
si->found = \
KMEM_OBJECT_ADDR_FREE; \
si->container = obj; \
return; \
} \
} \
} else { \
if (!(si->flags & ADDRESS_SPECIFIED)) \
fprintf(fp, " [%lx]\n", obj); \
cnt++; \
if (si->flags & ADDRESS_SPECIFIED) { \
if (INOBJECT(si->spec_addr, obj)) { \
si->found = \
KMEM_OBJECT_ADDR_INUSE; \
si->container = obj; \
return; \
} \
} \
}
static void
dump_slab_objects(struct meminfo *si)
{
int i, j;
ulong *next;
int on_free_list;
ulong cnt, expected;
ulong bufctl, obj;
gather_slab_free_list(si);
if ((si->flags & ADDRESS_SPECIFIED) && (si->found & ~KMEM_ON_SLAB))
return;
cnt = 0;
expected = si->s_inuse;
si->container = 0;
if (CRASHDEBUG(1))
for (i = 0; i < si->c_num; i++) {
fprintf(fp, "si->addrlist[%d]: %lx\n",
i, si->addrlist[i]);
}
if (!(si->flags & ADDRESS_SPECIFIED))
fprintf(fp, "%s", free_inuse_hdr);
/* For on-slab bufctls, c_offset is the distance between the start of
* an obj and its related bufctl. For off-slab bufctls, c_offset is
* the distance between objs in the slab.
*/
if (si->c_flags & SLAB_CFLGS_BUFCTL) {
for (i = 0, next = si->s_index; i < si->c_num; i++, next++) {
obj = si->s_mem +
((next - si->s_index) * si->c_offset);
DUMP_SLAB_OBJECT();
}
} else {
/*
* Get the "real" s_mem, i.e., without the offset stripped off.
* It contains the address of the first object.
*/
readmem(si->slab+OFFSET(kmem_slab_s_s_mem),
KVADDR, &obj, sizeof(ulong),
"s_mem", FAULT_ON_ERROR);
for (i = 0; i < si->c_num; i++) {
DUMP_SLAB_OBJECT();
if (si->flags & ADDRESS_SPECIFIED) {
bufctl = obj + si->c_offset;
if ((si->spec_addr >= bufctl) &&
(si->spec_addr <
(bufctl + SIZE(kmem_bufctl_t)))) {
si->found = KMEM_BUFCTL_ADDR;
return;
}
}
obj += (si->c_offset + SIZE(kmem_bufctl_t));
}
}
if (cnt != expected) {
error(INFO,
"\"%s\" cache: inuse object mismatch: expected: %ld found: %ld\n",
si->curname, expected, cnt);
si->errors++;
}
}
/*
* dump_slab_objects() adapted for newer percpu slab format.
*/
static void
dump_slab_objects_percpu(struct meminfo *si)
{
int i, j;
int on_free_list, on_cpudata_list, on_shared_list;
ulong cnt, expected;
ulong obj, freelist;
if ((si->flags & ADDRESS_SPECIFIED) && (si->found & ~KMEM_ON_SLAB))
if (!(si->found & KMEM_SLAB_OVERLOAD_PAGE))
return;
cnt = 0;
expected = si->s_inuse;
si->container = 0;
if (CRASHDEBUG(1))
for (i = 0; i < si->c_num; i++) {
fprintf(fp, "si->addrlist[%d]: %lx\n",
i, si->addrlist[i]);
}
if (!(si->flags & ADDRESS_SPECIFIED))
fprintf(fp, "%s", free_inuse_hdr);
for (i = 0, obj = si->s_mem; i < si->c_num; i++, obj += si->size) {
on_free_list = FALSE;
on_cpudata_list = FALSE;
on_shared_list = FALSE;
for (j = 0; j < si->c_num; j++) {
if (obj == si->addrlist[j]) {
on_free_list = TRUE;
break;
}
}
on_cpudata_list = check_cpudata_list(si, obj);
on_shared_list = check_shared_list(si, obj);
if (on_free_list && on_cpudata_list) {
error(INFO,
"\"%s\" cache: object %lx on both free and cpu %d lists\n",
si->curname, obj, si->cpu);
si->errors++;
}
if (on_free_list && on_shared_list) {
error(INFO,
"\"%s\" cache: object %lx on both free and shared lists\n",
si->curname, obj);
si->errors++;
}
if (on_cpudata_list && on_shared_list) {
error(INFO,
"\"%s\" cache: object %lx on both cpu %d and shared lists\n",
si->curname, obj, si->cpu);
si->errors++;
}
if (on_free_list) {
if (!(si->flags & ADDRESS_SPECIFIED))
fprintf(fp, " %lx\n", obj);
if (si->flags & ADDRESS_SPECIFIED) {
if (INOBJECT(si->spec_addr, obj)) {
si->found =
KMEM_OBJECT_ADDR_FREE;
si->container = obj;
return;
}
}
} else if (on_cpudata_list) {
if (!(si->flags & ADDRESS_SPECIFIED))
fprintf(fp, " %lx (cpu %d cache)\n", obj,
si->cpu);
cnt++;
if (si->flags & ADDRESS_SPECIFIED) {
if (INOBJECT(si->spec_addr, obj)) {
si->found =
KMEM_OBJECT_ADDR_CACHED;
si->container = obj;
return;
}
}
} else if (on_shared_list) {
if (!(si->flags & ADDRESS_SPECIFIED))
fprintf(fp, " %lx (shared cache)\n", obj);
cnt++;
if (si->flags & ADDRESS_SPECIFIED) {
if (INOBJECT(si->spec_addr, obj)) {
si->found =
KMEM_OBJECT_ADDR_SHARED;
si->container = obj;
return;
}
}
} else {
if (!(si->flags & ADDRESS_SPECIFIED))
fprintf(fp, " [%lx]\n", obj);
cnt++;
if (si->flags & ADDRESS_SPECIFIED) {
if (INOBJECT(si->spec_addr, obj)) {
si->found =
KMEM_OBJECT_ADDR_INUSE;
si->container = obj;
return;
}
}
}
}
if (cnt != expected) {
error(INFO,
"\"%s\" cache: inuse object mismatch: expected: %ld found: %ld\n",
si->curname, expected, cnt);
si->errors++;
}
if ((si->flags & ADDRESS_SPECIFIED) &&
(vt->flags & SLAB_OVERLOAD_PAGE)) {
readmem(si->slab - OFFSET(page_lru) + OFFSET(page_freelist),
KVADDR, &freelist, sizeof(ulong), "page.freelist",
FAULT_ON_ERROR);
if ((si->spec_addr >= freelist) && (si->spec_addr < si->s_mem))
si->found = KMEM_SLAB_FREELIST;
}
}
/*
* Determine how many of the "inuse" slab objects are actually cached
* in the kmem_cache_s header. Set the per-slab count and update the
* cumulative per-cache count. With the addition of the shared list
* check, the terms "cpucached_cache" and "cpucached_slab" are somewhat
* misleading. But they both are types of objects that are cached
* in the kmem_cache_s header, just not necessarily per-cpu.
*/
static void
gather_slab_cached_count(struct meminfo *si)
{
int i;
ulong obj;
int in_cpudata, in_shared;
si->cpucached_slab = 0;
for (i = 0, obj = si->s_mem; i < si->c_num; i++, obj += si->size) {
in_cpudata = in_shared = 0;
if (check_cpudata_list(si, obj)) {
in_cpudata = TRUE;
si->cpucached_slab++;
if (si->flags & SLAB_GET_COUNTS) {
si->cpucached_cache++;
}
}
if (check_shared_list(si, obj)) {
in_shared = TRUE;
if (!in_cpudata) {
si->cpucached_slab++;
if (si->flags & SLAB_GET_COUNTS) {
si->cpucached_cache++;
}
}
}
if (in_cpudata && in_shared) {
si->flags |= SLAB_DATA_NOSAVE;
if (!(si->flags & VERBOSE))
error(INFO,
"\"%s\" cache: object %lx on both cpu %d and shared lists\n",
si->curname, obj, si->cpu);
}
}
}
/*
* Populate the percpu object list for a given slab.
*/
static void
gather_cpudata_list_v1(struct meminfo *si)
{
int i, j;
int avail;
ulong cpudata[NR_CPUS];
if (INVALID_MEMBER(kmem_cache_s_cpudata))
return;
readmem(si->cache+OFFSET(kmem_cache_s_cpudata),
KVADDR, &cpudata[0],
sizeof(ulong) * ARRAY_LENGTH(kmem_cache_s_cpudata),
"cpudata array", FAULT_ON_ERROR);
for (i = 0; (i < ARRAY_LENGTH(kmem_cache_s_cpudata)) &&
cpudata[i]; i++) {
BZERO(si->cpudata[i], sizeof(ulong) * vt->kmem_max_limit);
readmem(cpudata[i]+OFFSET(cpucache_s_avail),
KVADDR, &avail, sizeof(int),
"cpucache avail", FAULT_ON_ERROR);
if (!avail)
continue;
if (avail > vt->kmem_max_limit) {
error(INFO,
"\"%s\" cache: cpucache_s.avail %d greater than limit %ld\n",
si->curname, avail, vt->kmem_max_limit);
si->errors++;
}
if (CRASHDEBUG(2))
fprintf(fp, "%s: cpu[%d] avail: %d\n",
si->curname, i, avail);
readmem(cpudata[i]+SIZE(cpucache_s),
KVADDR, si->cpudata[i],
sizeof(void *) * avail,
"cpucache avail", FAULT_ON_ERROR);
if (CRASHDEBUG(2))
for (j = 0; j < avail; j++)
fprintf(fp, " %lx\n", si->cpudata[i][j]);
}
}
/*
* Updated for 2.6 slab percpu data structure, this also gathers
* the shared array_cache list as well.
*/
static void
gather_cpudata_list_v2(struct meminfo *si)
{
int i, j;
int avail;
ulong cpudata[NR_CPUS];
ulong shared;
readmem(si->cache+OFFSET(kmem_cache_s_array),
KVADDR, &cpudata[0],
sizeof(ulong) * ARRAY_LENGTH(kmem_cache_s_array),
"array_cache array", FAULT_ON_ERROR);
for (i = 0; (i < ARRAY_LENGTH(kmem_cache_s_array)) &&
cpudata[i]; i++) {
BZERO(si->cpudata[i], sizeof(ulong) * vt->kmem_max_limit);
readmem(cpudata[i]+OFFSET(array_cache_avail),
KVADDR, &avail, sizeof(int),
"array cache avail", FAULT_ON_ERROR);
if (!avail)
continue;
if (avail > vt->kmem_max_limit) {
error(INFO,
"\"%s\" cache: array_cache.avail %d greater than limit %ld\n",
si->curname, avail, vt->kmem_max_limit);
si->errors++;
}
if (CRASHDEBUG(2))
fprintf(fp, "%s: cpu[%d] avail: %d\n",
si->curname, i, avail);
readmem(cpudata[i]+SIZE(array_cache),
KVADDR, si->cpudata[i],
sizeof(void *) * avail,
"array_cache avail", FAULT_ON_ERROR);
if (CRASHDEBUG(2))
for (j = 0; j < avail; j++)
fprintf(fp, " %lx (cpu %d)\n", si->cpudata[i][j], i);
}
/*
* If the shared list contains anything, gather them as well.
*/
BZERO(si->shared_array_cache, sizeof(ulong) * vt->kmem_max_limit);
if (!VALID_MEMBER(kmem_list3_shared) ||
!VALID_MEMBER(kmem_cache_s_lists) ||
!readmem(si->cache+OFFSET(kmem_cache_s_lists)+
OFFSET(kmem_list3_shared), KVADDR, &shared, sizeof(void *),
"kmem_list3 shared", RETURN_ON_ERROR|QUIET) ||
!readmem(shared+OFFSET(array_cache_avail),
KVADDR, &avail, sizeof(int), "shared array_cache avail",
RETURN_ON_ERROR|QUIET) || !avail)
return;
if (avail > vt->kmem_max_limit) {
error(INFO,
"\"%s\" cache: shared array_cache.avail %d greater than limit %ld\n",
si->curname, avail, vt->kmem_max_limit);
si->errors++;
return;
}
if (CRASHDEBUG(2))
fprintf(fp, "%s: shared avail: %d\n",
si->curname, avail);
readmem(shared+SIZE(array_cache), KVADDR, si->shared_array_cache,
sizeof(void *) * avail, "shared array_cache avail",
FAULT_ON_ERROR);
if (CRASHDEBUG(2))
for (j = 0; j < avail; j++)
fprintf(fp, " %lx (shared list)\n", si->shared_array_cache[j]);
}
/*
* Updated gather_cpudata_list_v2 for per-node kmem_list3's in kmem_cache
*/
static void
gather_cpudata_list_v2_nodes(struct meminfo *si, int index)
{
int i, j;
int avail;
ulong cpudata[NR_CPUS];
ulong shared;
ulong *start_address;
start_address = (ulong *) GETBUF(sizeof(ulong) * vt->kmem_cache_len_nodes);
readmem(si->cache+OFFSET(kmem_cache_s_array),
KVADDR, &cpudata[0],
sizeof(ulong) * vt->kmem_max_cpus,
"array_cache array", FAULT_ON_ERROR);
for (i = 0; (i < vt->kmem_max_cpus) && cpudata[i] && !(index); i++) {
if (si->cpudata[i])
BZERO(si->cpudata[i], sizeof(ulong) * vt->kmem_max_limit);
else
continue;
readmem(cpudata[i]+OFFSET(array_cache_avail),
KVADDR, &avail, sizeof(int),
"array cache avail", FAULT_ON_ERROR);
if (!avail)
continue;
if (avail > vt->kmem_max_limit) {
error(INFO,
"\"%s\" cache: array_cache.avail %d greater than limit %ld\n",
si->curname, avail, vt->kmem_max_limit);
si->errors++;
continue;
}
if (CRASHDEBUG(2))
fprintf(fp, "%s: cpu[%d] avail: %d\n",
si->curname, i, avail);
readmem(cpudata[i]+SIZE(array_cache),
KVADDR, si->cpudata[i],
sizeof(void *) * avail,
"array_cache avail", FAULT_ON_ERROR);
if (CRASHDEBUG(2))
for (j = 0; j < avail; j++)
fprintf(fp, " %lx (cpu %d)\n", si->cpudata[i][j], i);
}
/*
* If the shared list contains anything, gather them as well.
*/
if (si->flags & SLAB_FIRST_NODE) {
BZERO(si->shared_array_cache, sizeof(ulong) *
vt->kmem_max_limit * vt->kmem_cache_len_nodes);
si->current_cache_index = 0;
}
if (!readmem(kmem_cache_nodelists(si->cache), KVADDR, &start_address[0],
sizeof(ulong) * vt->kmem_cache_len_nodes , "array nodelist array",
RETURN_ON_ERROR) ||
!readmem(start_address[index] + OFFSET(kmem_list3_shared), KVADDR, &shared,
sizeof(void *), "kmem_list3 shared", RETURN_ON_ERROR|QUIET) || !shared ||
!readmem(shared + OFFSET(array_cache_avail), KVADDR, &avail, sizeof(int),
"shared array_cache avail", RETURN_ON_ERROR|QUIET) || !avail) {
FREEBUF(start_address);
return;
}
if (avail > vt->kmem_max_limit) {
error(INFO,
"\"%s\" cache: shared array_cache.avail %d greater than limit %ld\n",
si->curname, avail, vt->kmem_max_limit);
si->errors++;
FREEBUF(start_address);
return;
}
if (CRASHDEBUG(2))
fprintf(fp, "%s: shared avail: %d\n",
si->curname, avail);
readmem(shared+SIZE(array_cache), KVADDR, si->shared_array_cache + si->current_cache_index,
sizeof(void *) * avail, "shared array_cache avail",
FAULT_ON_ERROR);
if ((si->current_cache_index + avail) >
(vt->kmem_max_limit * vt->kmem_cache_len_nodes)) {
error(INFO,
"\"%s\" cache: total shared array_cache.avail %d greater than total limit %ld\n",
si->curname,
si->current_cache_index + avail,
vt->kmem_max_limit * vt->kmem_cache_len_nodes);
si->errors++;
FREEBUF(start_address);
return;
}
if (CRASHDEBUG(2))
for (j = si->current_cache_index; j < (si->current_cache_index + avail); j++)
fprintf(fp, " %lx (shared list)\n", si->shared_array_cache[j]);
si->current_cache_index += avail;
FREEBUF(start_address);
}
/*
* Check whether a given address is contained in the previously-gathered
* percpu object cache.
*/
static int
check_cpudata_list(struct meminfo *si, ulong obj)
{
int i, j;
for (i = 0; i < vt->kmem_max_cpus; i++) {
for (j = 0; si->cpudata[i][j]; j++)
if (si->cpudata[i][j] == obj) {
si->cpu = i;
return TRUE;
}
}
return FALSE;
}
/*
* Check whether a given address is contained in the previously-gathered
* shared object cache.
*/
static int
check_shared_list(struct meminfo *si, ulong obj)
{
int i;
if (INVALID_MEMBER(kmem_list3_shared) ||
!si->shared_array_cache)
return FALSE;
for (i = 0; si->shared_array_cache[i]; i++) {
if (si->shared_array_cache[i] == obj)
return TRUE;
}
return FALSE;
}
/*
* Search the various memory subsystems for instances of this address.
* Start with the most specific areas, ending up with at least the
* mem_map page data.
*/
static void
kmem_search(struct meminfo *mi)
{
struct syment *sp;
struct meminfo tmp_meminfo;
char buf[BUFSIZE];
ulong vaddr, orig_flags;
physaddr_t paddr;
ulong offset;
ulong task;
ulong show_flags;
struct task_context *tc;
vaddr = 0;
pc->curcmd_flags &= ~HEADER_PRINTED;
pc->curcmd_flags |= IGNORE_ERRORS;
switch (mi->memtype)
{
case KVADDR:
vaddr = mi->spec_addr;
break;
case PHYSADDR:
vaddr = mi->spec_addr < VTOP(vt->high_memory) ?
PTOV(mi->spec_addr) : BADADDR;
break;
}
orig_flags = mi->flags;
mi->retval = 0;
/*
* Check first for a possible symbolic display of the virtual
* address associated with mi->spec_addr or PTOV(mi->spec_addr).
*/
if (((vaddr >= kt->stext) && (vaddr <= kt->end)) ||
IS_MODULE_VADDR(mi->spec_addr)) {
if ((sp = value_search(vaddr, &offset))) {
show_flags = SHOW_LINENUM | SHOW_RADIX();
if (module_symbol(sp->value, NULL, NULL, NULL, 0))
show_flags |= SHOW_MODULE;
show_symbol(sp, offset, show_flags);
fprintf(fp, "\n");
}
}
/*
* Check for a valid mapped address.
*/
if ((mi->memtype == KVADDR) && IS_VMALLOC_ADDR(mi->spec_addr)) {
if (kvtop(NULL, mi->spec_addr, &paddr, 0)) {
mi->flags = orig_flags | VMLIST_VERIFY;
dump_vmlist(mi);
if (mi->retval) {
mi->flags = orig_flags;
dump_vmlist(mi);
fprintf(fp, "\n");
mi->spec_addr = paddr;
mi->memtype = PHYSADDR;
goto mem_map;
}
}
}
/*
* If the address is physical, check whether it's in vmalloc space.
*/
if (mi->memtype == PHYSADDR) {
mi->flags = orig_flags;
mi->flags |= GET_PHYS_TO_VMALLOC;
mi->retval = 0;
dump_vmlist(mi);
mi->flags &= ~GET_PHYS_TO_VMALLOC;
if (mi->retval) {
if ((sp = value_search(mi->retval, &offset))) {
show_symbol(sp, offset,
SHOW_LINENUM | SHOW_RADIX());
fprintf(fp, "\n");
}
dump_vmlist(mi);
fprintf(fp, "\n");
goto mem_map;
}
}
/*
* Check whether the containing page belongs to the slab subsystem.
*/
mi->flags = orig_flags;
mi->retval = 0;
if ((vaddr != BADADDR) && vaddr_to_kmem_cache(vaddr, buf, VERBOSE)) {
BZERO(&tmp_meminfo, sizeof(struct meminfo));
tmp_meminfo.spec_addr = vaddr;
tmp_meminfo.memtype = KVADDR;
tmp_meminfo.flags = mi->flags;
vt->dump_kmem_cache(&tmp_meminfo);
fprintf(fp, "\n");
}
if ((vaddr != BADADDR) && is_slab_page(mi, buf)) {
BZERO(&tmp_meminfo, sizeof(struct meminfo));
tmp_meminfo.spec_addr = vaddr;
tmp_meminfo.memtype = KVADDR;
tmp_meminfo.flags = mi->flags;
vt->dump_kmem_cache(&tmp_meminfo);
fprintf(fp, "\n");
}
/*
* Check free list.
*/
mi->flags = orig_flags;
mi->retval = 0;
vt->dump_free_pages(mi);
if (mi->retval)
fprintf(fp, "\n");
if (vt->page_hash_table) {
/*
* Check the page cache.
*/
mi->flags = orig_flags;
mi->retval = 0;
dump_page_hash_table(mi);
if (mi->retval)
fprintf(fp, "\n");
}
/*
* Check whether it's a current task or stack address.
*/
if ((mi->memtype == KVADDR) && (task = vaddr_in_task_struct(vaddr)) &&
(tc = task_to_context(task))) {
show_context(tc);
fprintf(fp, "\n");
} else if ((mi->memtype == KVADDR) && (task = stkptr_to_task(vaddr)) &&
(tc = task_to_context(task))) {
show_context(tc);
fprintf(fp, "\n");
}
mem_map:
mi->flags = orig_flags;
pc->curcmd_flags &= ~HEADER_PRINTED;
if (vaddr != BADADDR)
dump_mem_map(mi);
else
mi->retval = FALSE;
if (!mi->retval)
fprintf(fp, "%llx: %s address not found in mem map\n",
mi->spec_addr, memtype_string(mi->memtype, 0));
}
/*
* Determine whether an address is a page pointer from the mem_map[] array.
* If the caller requests it, return the associated physical address.
*/
int
is_page_ptr(ulong addr, physaddr_t *phys)
{
int n;
ulong ppstart, ppend;
struct node_table *nt;
ulong pgnum, node_size;
ulong nr, sec_addr;
ulong nr_mem_sections;
ulong coded_mem_map, mem_map, end_mem_map;
physaddr_t section_paddr;
if (IS_SPARSEMEM()) {
nr_mem_sections = NR_MEM_SECTIONS();
for (nr = 0; nr < nr_mem_sections ; nr++) {
if ((sec_addr = valid_section_nr(nr))) {
coded_mem_map = section_mem_map_addr(sec_addr);
mem_map = sparse_decode_mem_map(coded_mem_map, nr);
end_mem_map = mem_map + (PAGES_PER_SECTION() * SIZE(page));
if ((addr >= mem_map) && (addr < end_mem_map)) {
if ((addr - mem_map) % SIZE(page))
return FALSE;
if (phys) {
section_paddr = PTOB(section_nr_to_pfn(nr));
pgnum = (addr - mem_map) / SIZE(page);
*phys = section_paddr + ((physaddr_t)pgnum * PAGESIZE());
}
return TRUE;
}
}
}
return FALSE;
}
for (n = 0; n < vt->numnodes; n++) {
nt = &vt->node_table[n];
if ((vt->flags & V_MEM_MAP) && (vt->numnodes == 1))
node_size = vt->max_mapnr;
else
node_size = nt->size;
ppstart = nt->mem_map;
ppend = ppstart + (node_size * SIZE(page));
if ((addr < ppstart) || (addr >= ppend))
continue;
/*
* We're in the mem_map range -- but it is a page pointer?
*/
if ((addr - ppstart) % SIZE(page))
return FALSE;
if (phys) {
pgnum = (addr - nt->mem_map) / SIZE(page);
*phys = ((physaddr_t)pgnum * PAGESIZE()) + nt->start_paddr;
}
return TRUE;
}
return FALSE;
#ifdef PRE_NODES
ppstart = vt->mem_map;
ppend = ppstart + (vt->total_pages * vt->page_struct_len);
if ((addr < ppstart) || (addr >= ppend))
return FALSE;
if ((addr - ppstart) % vt->page_struct_len)
return FALSE;
return TRUE;
#endif
}
/*
* Return the physical address associated with this page pointer.
*/
static int
page_to_phys(ulong pp, physaddr_t *phys)
{
return(is_page_ptr(pp, phys));
}
/*
* Return the page pointer associated with this physical address.
*/
int
phys_to_page(physaddr_t phys, ulong *pp)
{
int n;
ulong pgnum;
struct node_table *nt;
physaddr_t pstart, pend;
ulong node_size;
if (IS_SPARSEMEM()) {
ulong map;
map = pfn_to_map(phys >> PAGESHIFT());
if (map) {
*pp = map;
return TRUE;
}
return FALSE;
}
for (n = 0; n < vt->numnodes; n++) {
nt = &vt->node_table[n];
if ((vt->flags & V_MEM_MAP) && (vt->numnodes == 1))
node_size = vt->max_mapnr;
else
node_size = nt->size;
pstart = nt->start_paddr;
pend = pstart + ((ulonglong)node_size * PAGESIZE());
if ((phys < pstart) || (phys >= pend))
continue;
/*
* We're in the physical range -- calculate the page.
*/
pgnum = BTOP(phys - pstart);
*pp = nt->mem_map + (pgnum * SIZE(page));
return TRUE;
}
return FALSE;
#ifdef PRE_NODES
if (phys >= (vt->total_pages * PAGESIZE()))
return FALSE;
pgnum = PTOB(BTOP(phys)) / PAGESIZE();
*pp = vt->mem_map + (pgnum * vt->page_struct_len);
return TRUE;
#endif
}
/*
* Fill the caller's buffer with up to maxlen non-NULL bytes
* starting from kvaddr, returning the number of consecutive
* non-NULL bytes found. If the buffer gets filled with
* maxlen bytes without a NULL, then the caller is reponsible
* for handling it.
*/
int
read_string(ulong kvaddr, char *buf, int maxlen)
{
int i;
BZERO(buf, maxlen);
readmem(kvaddr, KVADDR, buf, maxlen,
"read_string characters", QUIET|RETURN_ON_ERROR);
for (i = 0; i < maxlen; i++) {
if (buf[i] == NULLCHAR) {
BZERO(&buf[i], maxlen-i);
break;
}
}
return i;
}
/*
* "help -v" output
*/
void
dump_vm_table(int verbose)
{
int i;
struct node_table *nt;
int others;
ulong *up;
others = 0;
fprintf(fp, " flags: %lx %s(",
vt->flags, count_bits_long(vt->flags) > 4 ? "\n " : "");
if (vt->flags & NODES)
fprintf(fp, "%sNODES", others++ ? "|" : "");
if (vt->flags & NODES_ONLINE)
fprintf(fp, "%sNODES_ONLINE", others++ ? "|" : "");
if (vt->flags & ZONES)
fprintf(fp, "%sZONES", others++ ? "|" : "");
if (vt->flags & PERCPU_KMALLOC_V1)
fprintf(fp, "%sPERCPU_KMALLOC_V1", others++ ? "|" : "");
if (vt->flags & PERCPU_KMALLOC_V2)
fprintf(fp, "%sPERCPU_KMALLOC_V2", others++ ? "|" : "");
if (vt->flags & COMMON_VADDR)
fprintf(fp, "%sCOMMON_VADDR", others++ ? "|" : "");
if (vt->flags & KMEM_CACHE_INIT)
fprintf(fp, "%sKMEM_CACHE_INIT", others++ ? "|" : "");
if (vt->flags & V_MEM_MAP)
fprintf(fp, "%sV_MEM_MAP", others++ ? "|" : "");
if (vt->flags & KMEM_CACHE_UNAVAIL)
fprintf(fp, "%sKMEM_CACHE_UNAVAIL", others++ ? "|" : "");
if (vt->flags & DISCONTIGMEM)
fprintf(fp, "%sDISCONTIGMEM", others++ ? "|" : "");
if (vt->flags & FLATMEM)
fprintf(fp, "%sFLATMEM", others++ ? "|" : "");
if (vt->flags & SPARSEMEM)
fprintf(fp, "%sSPARSEMEM", others++ ? "|" : "");\
if (vt->flags & SPARSEMEM_EX)
fprintf(fp, "%sSPARSEMEM_EX", others++ ? "|" : "");\
if (vt->flags & KMEM_CACHE_DELAY)
fprintf(fp, "%sKMEM_CACHE_DELAY", others++ ? "|" : "");\
if (vt->flags & PERCPU_KMALLOC_V2_NODES)
fprintf(fp, "%sPERCPU_KMALLOC_V2_NODES", others++ ? "|" : "");\
if (vt->flags & VM_STAT)
fprintf(fp, "%sVM_STAT", others++ ? "|" : "");\
if (vt->flags & KMALLOC_SLUB)
fprintf(fp, "%sKMALLOC_SLUB", others++ ? "|" : "");\
if (vt->flags & KMALLOC_COMMON)
fprintf(fp, "%sKMALLOC_COMMON", others++ ? "|" : "");\
if (vt->flags & SLAB_OVERLOAD_PAGE)
fprintf(fp, "%sSLAB_OVERLOAD_PAGE", others++ ? "|" : "");\
if (vt->flags & USE_VMAP_AREA)
fprintf(fp, "%sUSE_VMAP_AREA", others++ ? "|" : "");\
if (vt->flags & CONFIG_NUMA)
fprintf(fp, "%sCONFIG_NUMA", others++ ? "|" : "");\
if (vt->flags & VM_EVENT)
fprintf(fp, "%sVM_EVENT", others++ ? "|" : "");\
if (vt->flags & PGCNT_ADJ)
fprintf(fp, "%sPGCNT_ADJ", others++ ? "|" : "");\
if (vt->flags & PAGEFLAGS)
fprintf(fp, "%sPAGEFLAGS", others++ ? "|" : "");\
if (vt->flags & SWAPINFO_V1)
fprintf(fp, "%sSWAPINFO_V1", others++ ? "|" : "");\
if (vt->flags & SWAPINFO_V2)
fprintf(fp, "%sSWAPINFO_V2", others++ ? "|" : "");\
if (vt->flags & NODELISTS_IS_PTR)
fprintf(fp, "%sNODELISTS_IS_PTR", others++ ? "|" : "");\
if (vt->flags & VM_INIT)
fprintf(fp, "%sVM_INIT", others++ ? "|" : "");\
fprintf(fp, ")\n");
if (vt->kernel_pgd[0] == vt->kernel_pgd[1])
fprintf(fp, " kernel_pgd[NR_CPUS]: %lx ...\n",
vt->kernel_pgd[0]);
else {
fprintf(fp, " kernel_pgd[NR_CPUS]: ");
for (i = 0; i < NR_CPUS; i++) {
if ((i % 4) == 0)
fprintf(fp, "\n ");
fprintf(fp, "%lx ", vt->kernel_pgd[i]);
}
fprintf(fp, "\n");
}
fprintf(fp, " high_memory: %lx\n", vt->high_memory);
fprintf(fp, " vmalloc_start: %lx\n", vt->vmalloc_start);
fprintf(fp, " mem_map: %lx\n", vt->mem_map);
fprintf(fp, " total_pages: %ld\n", vt->total_pages);
fprintf(fp, " max_mapnr: %ld\n", vt->max_mapnr);
fprintf(fp, " totalram_pages: %ld\n", vt->totalram_pages);
fprintf(fp, " totalhigh_pages: %ld\n", vt->totalhigh_pages);
fprintf(fp, " num_physpages: %ld\n", vt->num_physpages);
fprintf(fp, " page_hash_table: %lx\n", vt->page_hash_table);
fprintf(fp, "page_hash_table_len: %d\n", vt->page_hash_table_len);
fprintf(fp, " kmem_max_c_num: %ld\n", vt->kmem_max_c_num);
fprintf(fp, " kmem_max_limit: %ld\n", vt->kmem_max_limit);
fprintf(fp, " kmem_max_cpus: %ld\n", vt->kmem_max_cpus);
fprintf(fp, " kmem_cache_count: %ld\n", vt->kmem_cache_count);
fprintf(fp, " kmem_cache_namelen: %d\n", vt->kmem_cache_namelen);
fprintf(fp, "kmem_cache_len_nodes: %ld\n", vt->kmem_cache_len_nodes);
fprintf(fp, " nr_bad_slab_caches: %d\n", vt->nr_bad_slab_caches);
if (!vt->nr_bad_slab_caches)
fprintf(fp, " bad_slab_caches: (unused)\n");
else {
for (i = 0; i < vt->nr_bad_slab_caches; i++) {
fprintf(fp, " bad_slab_caches[%d]: %lx\n",
i, vt->bad_slab_caches[i]);
}
}
fprintf(fp, " paddr_prlen: %d\n", vt->paddr_prlen);
fprintf(fp, " numnodes: %d\n", vt->numnodes);
fprintf(fp, " nr_zones: %d\n", vt->nr_zones);
fprintf(fp, " nr_free_areas: %d\n", vt->nr_free_areas);
for (i = 0; i < vt->numnodes; i++) {
nt = &vt->node_table[i];
fprintf(fp, " node_table[%d]: \n", i);
fprintf(fp, " id: %d\n", nt->node_id);
fprintf(fp, " pgdat: %lx\n", nt->pgdat);
fprintf(fp, " size: %ld\n", nt->size);
fprintf(fp, " present: %ld\n", nt->present);
fprintf(fp, " mem_map: %lx\n", nt->mem_map);
fprintf(fp, " start_paddr: %llx\n", nt->start_paddr);
fprintf(fp, " start_mapnr: %ld\n", nt->start_mapnr);
}
fprintf(fp, " dump_free_pages: ");
if (vt->dump_free_pages == dump_free_pages)
fprintf(fp, "dump_free_pages()\n");
else if (vt->dump_free_pages == dump_free_pages_zones_v1)
fprintf(fp, "dump_free_pages_zones_v1()\n");
else if (vt->dump_free_pages == dump_free_pages_zones_v2)
fprintf(fp, "dump_free_pages_zones_v2()\n");
else if (vt->dump_free_pages == dump_multidimensional_free_pages)
fprintf(fp, "dump_multidimensional_free_pages()\n");
else
fprintf(fp, "%lx (unknown)\n", (ulong)vt->dump_free_pages);
fprintf(fp, " dump_kmem_cache: ");
if (vt->dump_kmem_cache == dump_kmem_cache)
fprintf(fp, "dump_kmem_cache()\n");
else if (vt->dump_kmem_cache == dump_kmem_cache_percpu_v1)
fprintf(fp, "dump_kmem_cache_percpu_v1()\n");
else if (vt->dump_kmem_cache == dump_kmem_cache_percpu_v2)
fprintf(fp, "dump_kmem_cache_percpu_v2()\n");
else if (vt->dump_kmem_cache == dump_kmem_cache_slub)
fprintf(fp, "dump_kmem_cache_slub()\n");
else
fprintf(fp, "%lx (unknown)\n", (ulong)vt->dump_kmem_cache);
fprintf(fp, " slab_data: %lx\n", (ulong)vt->slab_data);
if (verbose)
dump_saved_slab_data();
fprintf(fp, " cpu_slab_type: %d\n", vt->cpu_slab_type);
fprintf(fp, " nr_swapfiles: %d\n", vt->nr_swapfiles);
fprintf(fp, " last_swap_read: %lx\n", vt->last_swap_read);
fprintf(fp, " swap_info_struct: %lx\n", (ulong)vt->swap_info_struct);
fprintf(fp, " mem_sec: %lx\n", (ulong)vt->mem_sec);
fprintf(fp, " mem_section: %lx\n", (ulong)vt->mem_section);
fprintf(fp, " ZONE_HIGHMEM: %d\n", vt->ZONE_HIGHMEM);
fprintf(fp, "node_online_map_len: %d\n", vt->node_online_map_len);
if (vt->node_online_map_len) {
fprintf(fp, " node_online_map: ");
up = (ulong *)vt->node_online_map;
for (i = 0; i < vt->node_online_map_len; i++) {
fprintf(fp, "%s%lx", i ? ", " : "[", *up);
up++;
}
fprintf(fp, "]\n");
} else {
fprintf(fp, " node_online_map: (unused)\n");
}
fprintf(fp, " nr_vm_stat_items: %d\n", vt->nr_vm_stat_items);
fprintf(fp, " vm_stat_items: %s", (vt->flags & VM_STAT) ?
"\n" : "(not used)\n");
for (i = 0; i < vt->nr_vm_stat_items; i++)
fprintf(fp, " [%d] %s\n", i, vt->vm_stat_items[i]);
fprintf(fp, " nr_vm_event_items: %d\n", vt->nr_vm_event_items);
fprintf(fp, " vm_event_items: %s", (vt->flags & VM_EVENT) ?
"\n" : "(not used)\n");
for (i = 0; i < vt->nr_vm_event_items; i++)
fprintf(fp, " [%d] %s\n", i, vt->vm_event_items[i]);
fprintf(fp, " PG_reserved: %lx\n", vt->PG_reserved);
fprintf(fp, " PG_slab: %ld (%lx)\n", vt->PG_slab,
(ulong)1 << vt->PG_slab);
fprintf(fp, " PG_head_tail_mask: %lx\n", vt->PG_head_tail_mask);
fprintf(fp, " nr_pageflags: %d\n", vt->nr_pageflags);
fprintf(fp, " pageflags_data: %s\n",
vt->nr_pageflags ? "" : "(not used)");
for (i = 0; i < vt->nr_pageflags; i++) {
fprintf(fp, " %s[%d] %08lx: %s\n",
i < 10 ? " " : "", i,
vt->pageflags_data[i].mask,
vt->pageflags_data[i].name);
}
dump_vma_cache(VERBOSE);
}
/*
* Calculate the amount of memory referenced in the kernel-specific "nodes".
*/
uint64_t
total_node_memory()
{
int i;
struct node_table *nt;
uint64_t total;
for (i = total = 0; i < vt->numnodes; i++) {
nt = &vt->node_table[i];
if (CRASHDEBUG(1)) {
console("node_table[%d]: \n", i);
console(" id: %d\n", nt->node_id);
console(" pgdat: %lx\n", nt->pgdat);
console(" size: %ld\n", nt->size);
console(" present: %ld\n", nt->present);
console(" mem_map: %lx\n", nt->mem_map);
console(" start_paddr: %lx\n", nt->start_paddr);
console(" start_mapnr: %ld\n", nt->start_mapnr);
}
if (nt->present)
total += (uint64_t)((uint64_t)nt->present * (uint64_t)PAGESIZE());
else
total += (uint64_t)((uint64_t)nt->size * (uint64_t)PAGESIZE());
}
return total;
}
/*
* Dump just the vm_area_struct cache table data so that it can be
* called from above or for debug purposes.
*/
void
dump_vma_cache(ulong verbose)
{
int i;
ulong vhits;
if (!verbose)
goto show_hits;
for (i = 0; i < VMA_CACHE; i++)
fprintf(fp, " cached_vma[%2d]: %lx (%ld)\n",
i, vt->cached_vma[i],
vt->cached_vma_hits[i]);
fprintf(fp, " vma_cache: %lx\n", (ulong)vt->vma_cache);
fprintf(fp, " vma_cache_index: %d\n", vt->vma_cache_index);
fprintf(fp, " vma_cache_fills: %ld\n", vt->vma_cache_fills);
fflush(fp);
show_hits:
if (vt->vma_cache_fills) {
for (i = vhits = 0; i < VMA_CACHE; i++)
vhits += vt->cached_vma_hits[i];
fprintf(stderr, "%s vma hit rate: %2ld%% (%ld of %ld)\n",
verbose ? "" : " ",
(vhits * 100)/vt->vma_cache_fills,
vhits, vt->vma_cache_fills);
}
}
/*
* Guess at the "real" amount of physical memory installed, formatting
* it in a MB or GB based string.
*/
char *
get_memory_size(char *buf)
{
uint64_t total;
ulong next_gig;
#ifdef OLDWAY
ulong mbs, gbs;
#endif
total = machdep->memory_size();
if ((next_gig = roundup(total, GIGABYTES(1)))) {
if ((next_gig - total) <= MEGABYTES(64))
total = next_gig;
}
return (pages_to_size((ulong)(total/PAGESIZE()), buf));
#ifdef OLDWAY
gbs = (ulong)(total/GIGABYTES(1));
mbs = (ulong)(total/MEGABYTES(1));
if (gbs)
mbs = (total % GIGABYTES(1))/MEGABYTES(1);
if (total%MEGABYTES(1))
mbs++;
if (gbs)
sprintf(buf, mbs ? "%ld GB %ld MB" : "%ld GB", gbs, mbs);
else
sprintf(buf, "%ld MB", mbs);
return buf;
#endif
}
/*
* For use by architectures not having machine-specific manners for
* best determining physical memory size.
*/
uint64_t
generic_memory_size(void)
{
if (machdep->memsize)
return machdep->memsize;
return (machdep->memsize = total_node_memory());
}
/*
* Determine whether a virtual address is user or kernel or ambiguous.
*/
int
vaddr_type(ulong vaddr, struct task_context *tc)
{
int memtype, found;
if (!tc)
tc = CURRENT_CONTEXT();
memtype = found = 0;
if (machdep->is_uvaddr(vaddr, tc)) {
memtype |= UVADDR;
found++;
}
if (machdep->is_kvaddr(vaddr)) {
memtype |= KVADDR;
found++;
}
if (found == 1)
return memtype;
else
return AMBIGUOUS;
}
/*
* Determine the first valid user space address
*/
static int
address_space_start(struct task_context *tc, ulong *addr)
{
ulong vma;
char *vma_buf;
if (!tc->mm_struct)
return FALSE;
fill_mm_struct(tc->mm_struct);
vma = ULONG(tt->mm_struct + OFFSET(mm_struct_mmap));
if (!vma)
return FALSE;
vma_buf = fill_vma_cache(vma);
*addr = ULONG(vma_buf + OFFSET(vm_area_struct_vm_start));
return TRUE;
}
int
generic_get_kvaddr_ranges(struct vaddr_range *rp)
{
int cnt;
if (XEN_HYPER_MODE())
return 0;
cnt = 0;
rp[cnt].type = KVADDR_UNITY_MAP;
rp[cnt].start = machdep->kvbase;
rp[cnt++].end = vt->vmalloc_start;
rp[cnt].type = KVADDR_VMALLOC;
rp[cnt].start = vt->vmalloc_start;
rp[cnt++].end = (ulong)(-1);
return cnt;
}
/*
* Search for a given value between a starting and ending address range,
* applying an optional mask for "don't care" bits. As an alternative
* to entering the starting address value, -k means "start of kernel address
* space". For processors with ambiguous user/kernel address spaces,
* -u or -k must be used (with or without -s) as a differentiator.
*/
void
cmd_search(void)
{
int i, c, memtype, ranges, context, max;
ulonglong start, end;
ulong value, mask, len;
ulong uvaddr_start, uvaddr_end;
ulong kvaddr_start, kvaddr_end, range_end;
int sflag, Kflag, Vflag, pflag, tflag;
struct searchinfo searchinfo;
struct syment *sp;
struct node_table *nt;
struct vaddr_range vaddr_ranges[MAX_KVADDR_RANGES];
struct vaddr_range *vrp;
struct task_context *tc;
#define vaddr_overflow(ADDR) (BITS32() && ((ADDR) > 0xffffffffULL))
#define uint_overflow(VALUE) ((VALUE) > 0xffffffffUL)
#define ushort_overflow(VALUE) ((VALUE) > 0xffffUL)
context = max = 0;
start = end = 0;
value = mask = sflag = pflag = Kflag = Vflag = memtype = len = tflag = 0;
kvaddr_start = kvaddr_end = 0;
uvaddr_start = UNINITIALIZED;
uvaddr_end = COMMON_VADDR_SPACE() ? (ulong)(-1) : machdep->kvbase;
BZERO(&searchinfo, sizeof(struct searchinfo));
vrp = &vaddr_ranges[0];
ranges = machdep->get_kvaddr_ranges(vrp);
if (CRASHDEBUG(1)) {
fprintf(fp, "kvaddr ranges:\n");
for (i = 0; i < ranges; i++) {
fprintf(fp, " [%d] %lx %lx ", i,
vrp[i].start, vrp[i].end);
switch (vrp[i].type)
{
case KVADDR_UNITY_MAP:
fprintf(fp, "KVADDR_UNITY_MAP\n");
break;
case KVADDR_START_MAP:
fprintf(fp, "KVADDR_START_MAP\n");
break;
case KVADDR_VMALLOC:
fprintf(fp, "KVADDR_VMALLOC\n");
break;
case KVADDR_MODULES:
fprintf(fp, "KVADDR_MODULES\n");
break;
case KVADDR_VMEMMAP:
fprintf(fp, "KVADDR_VMEMMAP\n");
break;
}
}
}
searchinfo.mode = SEARCH_ULONG; /* default search */
while ((c = getopt(argcnt, args, "tl:ukKVps:e:v:m:hwcx:")) != EOF) {
switch(c)
{
case 'u':
if (XEN_HYPER_MODE())
error(FATAL,
"-u option is not applicable to the "
"Xen hypervisor\n");
if (is_kernel_thread(CURRENT_TASK()) ||
!task_mm(CURRENT_TASK(), TRUE))
error(FATAL,
"current context has no user address space\n");
if (!sflag) {
address_space_start(CURRENT_CONTEXT(),
&uvaddr_start);
start = (ulonglong)uvaddr_start;
}
memtype = UVADDR;
sflag++;
break;
case 'p':
if (XEN_HYPER_MODE())
error(FATAL,
"-p option is not applicable to the "
"Xen hypervisor\n");
memtype = PHYSADDR;
if (!sflag) {
nt = &vt->node_table[0];
start = nt->start_paddr;
}
sflag++;
break;
case 'V':
case 'K':
case 'k':
if (XEN_HYPER_MODE())
error(FATAL,
"-%c option is not applicable to the "
"Xen hypervisor\n", c);
if (!sflag)
start = vrp[0].start;
memtype = KVADDR;
sflag++;
if (c == 'K')
Kflag++;
else if (c == 'V')
Vflag++;
break;
case 's':
if ((sp = symbol_search(optarg)))
start = (ulonglong)sp->value;
else
start = htoll(optarg, FAULT_ON_ERROR, NULL);
sflag++;
break;
case 'e':
if ((sp = symbol_search(optarg)))
end = (ulonglong)sp->value;
else
end = htoll(optarg, FAULT_ON_ERROR, NULL);
if (!end)
error(FATAL, "invalid ending address: 0\n");
break;
case 'l':
len = stol(optarg, FAULT_ON_ERROR, NULL);
break;
case 'm':
mask = htol(optarg, FAULT_ON_ERROR, NULL);
break;
case 'h':
if (searchinfo.mode != SEARCH_DEFAULT)
error(INFO, "WARNING: overriding previously"
" set search mode with \"h\"\n");
searchinfo.mode = SEARCH_USHORT;
break;
case 'w':
if (searchinfo.mode != SEARCH_DEFAULT)
error(INFO, "WARNING: overriding previously"
" set search mode with \"w\"\n");
searchinfo.mode = SEARCH_UINT;
break;
case 'c':
if (searchinfo.mode != SEARCH_DEFAULT)
error(INFO, "WARNING: overriding previously"
" set search type with \"c\"\n");
searchinfo.mode = SEARCH_CHARS;
break;
case 'x':
context = dtoi(optarg, FAULT_ON_ERROR, NULL);
break;
case 't':
if (XEN_HYPER_MODE())
error(FATAL,
"-t option is not applicable to the "
"Xen hypervisor\n");
tflag++;
break;
default:
argerrs++;
break;
}
}
if (tflag && (memtype || start || end || len))
error(FATAL,
"-t option cannot be used with other "
"memory-selection options\n");
if (XEN_HYPER_MODE()) {
memtype = KVADDR;
if (!sflag)
error(FATAL,
"the \"-s start\" option is required for"
" the Xen hypervisor\n");
} else if (!memtype) {
memtype = KVADDR;
if (!tflag && !sflag++)
start = vrp[0].start;
}
if (argerrs || (!sflag && !tflag) || !args[optind] ||
(len && end) || !memtype)
cmd_usage(pc->curcmd, SYNOPSIS);
searchinfo.memtype = memtype;
/*
* Verify starting address.
*/
switch (memtype)
{
case UVADDR:
if (vaddr_overflow(start) ||
!IS_UVADDR((ulong)start, CURRENT_CONTEXT())) {
error(INFO, "invalid user virtual address: %llx\n",
start);
cmd_usage(pc->curcmd, SYNOPSIS);
}
break;
case KVADDR:
if (tflag)
break;
if (vaddr_overflow(start) ||
!IS_KVADDR((ulong)start)) {
error(INFO, "invalid kernel virtual address: %llx\n",
(ulonglong)start);
cmd_usage(pc->curcmd, SYNOPSIS);
}
break;
case AMBIGUOUS:
error(INFO,
"ambiguous virtual address: %llx (requires -u or -k)\n",
(ulonglong)start);
cmd_usage(pc->curcmd, SYNOPSIS);
}
/*
* Set up ending address if necessary.
*/
if (!end && !len && !tflag) {
switch (memtype)
{
case UVADDR:
end = (ulonglong)uvaddr_end;
break;
case KVADDR:
if (XEN_HYPER_MODE())
end = (ulong)(-1);
else {
range_end = 0;
for (i = 0; i < ranges; i++) {
if (vrp[i].end > range_end)
range_end = vrp[i].end;
}
end = (ulonglong)range_end;
}
break;
case PHYSADDR:
nt = &vt->node_table[vt->numnodes-1];
end = nt->start_paddr + (nt->size * PAGESIZE());
break;
}
} else if (len)
end = start + len;
/*
* Final verification and per-type start/end variable setting.
*/
switch (memtype)
{
case UVADDR:
uvaddr_start = (ulong)start;
if (end > (ulonglong)uvaddr_end) {
error(INFO,
"ending address %lx is in kernel space: %llx\n", end);
cmd_usage(pc->curcmd, SYNOPSIS);
}
if (end < (ulonglong)uvaddr_end)
uvaddr_end = (ulong)end;
if (uvaddr_end < uvaddr_start) {
error(INFO,
"ending address %lx is below starting address %lx\n",
uvaddr_end, uvaddr_start);
cmd_usage(pc->curcmd, SYNOPSIS);
}
break;
case KVADDR:
if (tflag)
break;
kvaddr_start = (ulong)start;
kvaddr_end = (ulong)end;
if (kvaddr_end < kvaddr_start) {
error(INFO,
"ending address %lx is below starting address %lx\n",
kvaddr_end, kvaddr_start);
cmd_usage(pc->curcmd, SYNOPSIS);
}
break;
case PHYSADDR:
if (end < start) {
error(INFO,
"ending address %llx is below starting address %llx\n",
(ulonglong)end, (ulonglong)start);
cmd_usage(pc->curcmd, SYNOPSIS);
}
break;
}
if (mask) {
switch (searchinfo.mode)
{
case SEARCH_ULONG:
searchinfo.s_parms.s_ulong.mask = mask;
break;
case SEARCH_UINT:
searchinfo.s_parms.s_uint.mask = mask;
break;
case SEARCH_USHORT:
searchinfo.s_parms.s_ushort.mask = mask;
break;
case SEARCH_CHARS:
error(INFO, "mask ignored on string search\n");
break;
}
}
if (context) {
switch (searchinfo.mode)
{
case SEARCH_ULONG:
max = PAGESIZE()/sizeof(long);
break;
case SEARCH_UINT:
max = PAGESIZE()/sizeof(int);
break;
case SEARCH_USHORT:
max = PAGESIZE()/sizeof(short);
break;
case SEARCH_CHARS:
error(FATAL, "-x option is not allowed with -c\n");
break;
}
if (context > max)
error(FATAL,
"context value %d is too large: maximum is %d\n",
context, max);
searchinfo.context = context;
}
searchinfo.vcnt = 0;
searchinfo.val = UNUSED;
while (args[optind]) {
switch (searchinfo.mode)
{
case SEARCH_ULONG:
if (can_eval(args[optind])) {
value = eval(args[optind], FAULT_ON_ERROR, NULL);
searchinfo.s_parms.s_ulong.opt_string[searchinfo.vcnt] =
mask ? NULL : args[optind];
} else if (symbol_exists(args[optind])) {
value = symbol_value(args[optind]);
searchinfo.s_parms.s_ulong.opt_string[searchinfo.vcnt] =
mask ? NULL : args[optind];
} else
value = htol(args[optind], FAULT_ON_ERROR, NULL);
searchinfo.s_parms.s_ulong.value[searchinfo.vcnt] = value;
searchinfo.vcnt++;
break;
case SEARCH_UINT:
if (can_eval(args[optind])) {
value = eval(args[optind], FAULT_ON_ERROR, NULL);
searchinfo.s_parms.s_uint.opt_string[searchinfo.vcnt] =
mask ? NULL : args[optind];
} else if (symbol_exists(args[optind])) {
value = symbol_value(args[optind]);
searchinfo.s_parms.s_uint.opt_string[searchinfo.vcnt] =
mask ? NULL : args[optind];
} else
value = htol(args[optind], FAULT_ON_ERROR, NULL);
searchinfo.s_parms.s_uint.value[searchinfo.vcnt] = value;
if (uint_overflow(value))
error(FATAL, "value too large for -w option: %lx %s\n",
value, show_opt_string(&searchinfo));
searchinfo.vcnt++;
break;
case SEARCH_USHORT:
if (can_eval(args[optind])) {
value = eval(args[optind], FAULT_ON_ERROR, NULL);
searchinfo.s_parms.s_ushort.opt_string[searchinfo.vcnt] =
mask ? NULL : args[optind];
} else if (symbol_exists(args[optind])) {
value = symbol_value(args[optind]);
searchinfo.s_parms.s_ushort.opt_string[searchinfo.vcnt] =
mask ? NULL : args[optind];
} else
value = htol(args[optind], FAULT_ON_ERROR, NULL);
searchinfo.s_parms.s_ushort.value[searchinfo.vcnt] = value;
if (ushort_overflow(value))
error(FATAL, "value too large for -h option: %lx %s\n",
value, show_opt_string(&searchinfo));
searchinfo.vcnt++;
break;
case SEARCH_CHARS:
/* parser can deliver empty strings */
if (strlen(args[optind])) {
searchinfo.s_parms.s_chars.value[searchinfo.vcnt] =
args[optind];
searchinfo.s_parms.s_chars.len[searchinfo.vcnt] =
strlen(args[optind]);
searchinfo.vcnt++;
}
break;
}
optind++;
}
if (!searchinfo.vcnt)
cmd_usage(pc->curcmd, SYNOPSIS);
switch (memtype)
{
case PHYSADDR:
searchinfo.paddr_start = start;
searchinfo.paddr_end = end;
search_physical(&searchinfo);
break;
case UVADDR:
searchinfo.vaddr_start = uvaddr_start;
searchinfo.vaddr_end = uvaddr_end;
search_virtual(&searchinfo);
break;
case KVADDR:
if (XEN_HYPER_MODE()) {
searchinfo.vaddr_start = kvaddr_start;
searchinfo.vaddr_end = kvaddr_end;
search_virtual(&searchinfo);
break;
}
if (tflag) {
searchinfo.tasks_found = 0;
tc = FIRST_CONTEXT();
for (i = 0; i < RUNNING_TASKS(); i++, tc++) {
searchinfo.vaddr_start = GET_STACKBASE(tc->task);
searchinfo.vaddr_end = GET_STACKTOP(tc->task);
searchinfo.task_context = tc;
searchinfo.do_task_header = TRUE;
search_virtual(&searchinfo);
}
break;
}
for (i = 0; i < ranges; i++) {
if ((kvaddr_start >= vrp[i].end) ||
(kvaddr_end <= vrp[i].start))
continue;
switch (vrp[i].type)
{
case KVADDR_UNITY_MAP:
case KVADDR_START_MAP:
if (Vflag)
continue;
break;
case KVADDR_VMALLOC:
case KVADDR_MODULES:
case KVADDR_VMEMMAP:
if (Kflag)
continue;
break;
}
pc->curcmd_private = vrp[i].type;
searchinfo.vaddr_start =
kvaddr_start > vrp[i].start ?
kvaddr_start : vrp[i].start;
searchinfo.vaddr_end =
(kvaddr_end < vrp[i].end) ?
kvaddr_end : vrp[i].end;
search_virtual(&searchinfo);
}
break;
}
}
/*
* Do the work for cmd_search().
*/
static char *
show_opt_string(struct searchinfo *si)
{
char *opt_string;
int index;
index = (si->val == UNUSED) ? si->vcnt : si->val;
switch (si->mode)
{
case SEARCH_USHORT:
opt_string = si->s_parms.s_ushort.opt_string[index];
break;
case SEARCH_UINT:
opt_string = si->s_parms.s_uint.opt_string[index];
break;
case SEARCH_ULONG:
default:
opt_string = si->s_parms.s_ulong.opt_string[index];
break;
}
if (!opt_string)
return "";
else if (FIRSTCHAR(opt_string) == '(')
return opt_string;
else {
sprintf(si->buf, "(%s)", opt_string);
return si->buf;
}
}
#define SEARCHMASK(X) ((X) | mask)
static void
display_with_pre_and_post(void *bufptr, ulonglong addr, struct searchinfo *si)
{
int ctx, memtype, t, amount;
ulonglong addr_d;
ulong flag;
char buf[BUFSIZE];
ctx = si->context;
memtype = si->memtype;
flag = HEXADECIMAL|NO_ERROR|ASCII_ENDLINE;
switch (si->mode)
{
case SEARCH_USHORT:
t = sizeof(ushort);
break;
case SEARCH_UINT:
t = sizeof(uint);
break;
case SEARCH_ULONG:
default:
t = sizeof(ulong);
break;
}
switch (t)
{
case 8:
flag |= DISPLAY_64;
break;
case 4:
flag |= DISPLAY_32;
break;
case 2:
flag |= DISPLAY_16;
break;
}
amount = ctx * t;
addr_d = addr - amount < 0 ? 0 : addr - amount;
display_memory(addr_d, ctx, flag, memtype, NULL);
BZERO(buf, BUFSIZE);
fprintf(fp, "%s: ", mkstring(buf, VADDR_PRLEN,
RJUST|LONGLONG_HEX, MKSTR(&addr)));
switch(si->mode)
{
case SEARCH_ULONG:
fprintf(fp, "%lx %s\n", *((ulong *)bufptr),
show_opt_string(si));
break;
case SEARCH_UINT:
fprintf(fp, "%x %s\n", *((uint *)bufptr),
show_opt_string(si));
break;
case SEARCH_USHORT:
fprintf(fp, "%x %s\n", *((ushort *)bufptr),
show_opt_string(si));
break;
}
addr_d = addr + t;
display_memory(addr_d, ctx, flag, memtype, NULL);
fprintf(fp, "\n");
}
static ulong
search_ulong(ulong *bufptr, ulong addr, int longcnt, struct searchinfo *si)
{
int i;
ulong mask = si->s_parms.s_ulong.mask;
for (i = 0; i < longcnt; i++, bufptr++, addr += sizeof(long)) {
for (si->val = 0; si->val < si->vcnt; si->val++) {
if (SEARCHMASK(*bufptr) ==
SEARCHMASK(si->s_parms.s_ulong.value[si->val])) {
if (si->do_task_header) {
print_task_header(fp, si->task_context,
si->tasks_found);
si->do_task_header = FALSE;
si->tasks_found++;
}
if (si->context)
display_with_pre_and_post(bufptr, addr, si);
else
fprintf(fp, "%lx: %lx %s\n", addr, *bufptr,
show_opt_string(si));
}
}
}
return addr;
}
/* phys search uses ulonglong address representation */
static ulonglong
search_ulong_p(ulong *bufptr, ulonglong addr, int longcnt, struct searchinfo *si)
{
int i;
ulong mask = si->s_parms.s_ulong.mask;
for (i = 0; i < longcnt; i++, bufptr++, addr += sizeof(long)) {
for (si->val = 0; si->val < si->vcnt; si->val++) {
if (SEARCHMASK(*bufptr) ==
SEARCHMASK(si->s_parms.s_ulong.value[si->val])) {
if (si->context)
display_with_pre_and_post(bufptr, addr, si);
else
fprintf(fp, "%llx: %lx %s\n", addr, *bufptr,
show_opt_string(si));
}
}
}
return addr;
}
static ulong
search_uint(ulong *bufptr, ulong addr, int longcnt, struct searchinfo *si)
{
int i;
int cnt = longcnt * (sizeof(long)/sizeof(int));
uint *ptr = (uint *)bufptr;
uint mask = si->s_parms.s_uint.mask;
for (i = 0; i < cnt; i++, ptr++, addr += sizeof(int)) {
for (si->val = 0; si->val < si->vcnt; si->val++) {
if (SEARCHMASK(*ptr) ==
SEARCHMASK(si->s_parms.s_uint.value[si->val])) {
if (si->do_task_header) {
print_task_header(fp, si->task_context,
si->tasks_found);
si->do_task_header = FALSE;
si->tasks_found++;
}
if (si->context)
display_with_pre_and_post(ptr, addr, si);
else
fprintf(fp, "%lx: %x %s\n", addr, *ptr,
show_opt_string(si));
}
}
}
return addr;
}
/* phys search uses ulonglong address representation */
static ulonglong
search_uint_p(ulong *bufptr, ulonglong addr, int longcnt, struct searchinfo *si)
{
int i;
int cnt = longcnt * (sizeof(long)/sizeof(int));
uint *ptr = (uint *)bufptr;
uint mask = si->s_parms.s_uint.mask;
for (i = 0; i < cnt; i++, ptr++, addr += sizeof(int)) {
for (si->val = 0; si->val < si->vcnt; si->val++) {
if (SEARCHMASK(*ptr) ==
SEARCHMASK(si->s_parms.s_uint.value[si->val])) {
if (si->context)
display_with_pre_and_post(ptr, addr, si);
else
fprintf(fp, "%llx: %x %s\n", addr, *ptr,
show_opt_string(si));
}
}
}
return addr;
}
static ulong
search_ushort(ulong *bufptr, ulong addr, int longcnt, struct searchinfo *si)
{
int i;
int cnt = longcnt * (sizeof(long)/sizeof(short));
ushort *ptr = (ushort *)bufptr;
ushort mask = si->s_parms.s_ushort.mask;
for (i = 0; i < cnt; i++, ptr++, addr += sizeof(short)) {
for (si->val = 0; si->val < si->vcnt; si->val++) {
if (SEARCHMASK(*ptr) ==
SEARCHMASK(si->s_parms.s_ushort.value[si->val])) {
if (si->do_task_header) {
print_task_header(fp, si->task_context,
si->tasks_found);
si->do_task_header = FALSE;
si->tasks_found++;
}
if (si->context)
display_with_pre_and_post(ptr, addr, si);
else
fprintf(fp, "%lx: %x %s\n", addr, *ptr,
show_opt_string(si));
}
}
}
return addr;
}
/* phys search uses ulonglong address representation */
static ulonglong
search_ushort_p(ulong *bufptr, ulonglong addr, int longcnt, struct searchinfo *si)
{
int i;
int cnt = longcnt * (sizeof(long)/sizeof(short));
ushort *ptr = (ushort *)bufptr;
ushort mask = si->s_parms.s_ushort.mask;
for (i = 0; i < cnt; i++, ptr++, addr += sizeof(short)) {
for (si->val = 0; si->val < si->vcnt; si->val++) {
if (SEARCHMASK(*ptr) ==
SEARCHMASK(si->s_parms.s_ushort.value[si->val])) {
if (si->context)
display_with_pre_and_post(ptr, addr, si);
else
fprintf(fp, "%llx: %x %s\n", addr, *ptr,
show_opt_string(si));
}
}
}
return addr;
}
/*
* String search "memory" to remember possible matches that cross
* page (or search buffer) boundaries.
* The cross_match zone is the last strlen-1 chars of the page for
* each of the possible targets.
*/
struct cross_match {
int cnt; /* possible hits in the cross_match zone */
ulong addr; /* starting addr of crossing match zone for this target */
ulonglong addr_p; /* for physical search */
char hit[BUFSIZE]; /* array of hit locations in the crossing match zone */
/* This should really be the much-smaller MAXARGLEN, but
* no one seems to be enforcing that in the parser.
*/
} cross[MAXARGS];
ulong cross_match_next_addr; /* the expected starting value of the next page */
ulonglong cross_match_next_addr_p; /* the expected starting value of the next physical page */
#define CHARS_CTX 56
static void
report_match(struct searchinfo *si, ulong addr, char *ptr1, int len1, char *ptr2, int len2)
{
int i;
if (si->do_task_header) {
print_task_header(fp, si->task_context, si->tasks_found);
si->do_task_header = FALSE;
si->tasks_found++;
}
fprintf(fp, "%lx: ", addr);
for (i = 0; i < len1; i++) {
if (isprint(ptr1[i]))
fprintf(fp, "%c", ptr1[i]);
else
fprintf(fp, ".");
}
for (i = 0; i < len2; i++) {
if (isprint(ptr2[i]))
fprintf(fp, "%c", ptr2[i]);
else
fprintf(fp, ".");
}
fprintf(fp, "\n");
}
static ulong
search_chars(ulong *bufptr, ulong addr, int longcnt, struct searchinfo *si)
{
int i, j;
int len;
char *target;
int charcnt = longcnt * sizeof(long);
char *ptr = (char *)bufptr;
/* is this the first page of this search? */
if (si->s_parms.s_chars.started_flag == 0) {
for (j = 0; j < si->vcnt; j++) {
cross[j].cnt = 0; /* no hits */
}
cross_match_next_addr = (ulong)-1; /* no page match for first page */
si->s_parms.s_chars.started_flag++;
}
if (cross_match_next_addr == addr) {
for (j = 0; j < si->vcnt; j++) {
if (cross[j].cnt) {
target = si->s_parms.s_chars.value[j];
len = si->s_parms.s_chars.len[j];
for (i = 0; i < len - 1; i++) {
if (cross[j].hit[i] &&
!strncmp(&target[len - 1 - i], ptr, i + 1))
report_match(si, cross[j].addr + i,
target, len,
&ptr[i+1],
CHARS_CTX - len);
}
}
}
}
/* set up for possible cross matches on this page */
cross_match_next_addr = addr + charcnt;
for (j = 0; j < si->vcnt; j++) {
len = si->s_parms.s_chars.len[j];
cross[j].cnt = 0;
cross[j].addr = addr + longcnt * sizeof(long) - (len - 1);
for (i = 0; i < len - 1; i++)
cross[j].hit[i] = 0;
}
for (i = 0; i < charcnt; i++, ptr++, addr++) {
for (j = 0; j < si->vcnt; j++) {
target = si->s_parms.s_chars.value[j];
len = si->s_parms.s_chars.len[j];
if ((i + len) > charcnt) {
/* check for cross match */
if (!strncmp(target, ptr, charcnt - i)) {
cross[j].hit[len + i - charcnt - 1] = 1;
cross[j].cnt++;
}
} else {
if (!strncmp(target, ptr, len)) {
int slen = CHARS_CTX;
if ((i + CHARS_CTX) > charcnt)
slen = charcnt - i;
report_match(si, addr, ptr, slen, (char *)0, 0);
}
}
}
}
return addr;
}
static void
report_match_p(ulonglong addr, char *ptr1, int len1, char *ptr2, int len2)
{
int i;
fprintf(fp, "%llx: ", addr);
for (i = 0; i < len1; i++) {
if (isprint(ptr1[i]))
fprintf(fp, "%c", ptr1[i]);
else
fprintf(fp, ".");
}
for (i = 0; i < len2; i++) {
if (isprint(ptr2[i]))
fprintf(fp, "%c", ptr2[i]);
else
fprintf(fp, ".");
}
fprintf(fp, "\n");
}
static ulonglong
search_chars_p(ulong *bufptr, ulonglong addr_p, int longcnt, struct searchinfo *si)
{
int i, j;
int len;
char *target;
int charcnt = longcnt * sizeof(long);
char *ptr = (char *)bufptr;
/* is this the first page of this search? */
if (si->s_parms.s_chars.started_flag == 0) {
for (j = 0; j < si->vcnt; j++) {
cross[j].cnt = 0; /* no hits */
}
cross_match_next_addr_p = (ulonglong)-1; /* no page match for first page */
si->s_parms.s_chars.started_flag++;
}
if (cross_match_next_addr_p == addr_p) {
for (j = 0; j < si->vcnt; j++) {
if (cross[j].cnt) {
target = si->s_parms.s_chars.value[j];
len = si->s_parms.s_chars.len[j];
for (i = 0; i < len - 1; i++) {
if (cross[j].hit[i] &&
!strncmp(&target[len - 1 - i], ptr, i + 1))
report_match_p(cross[j].addr_p + i,
target, len,
&ptr[i+1],
CHARS_CTX - len);
}
}
}
}
/* set up for possible cross matches on this page */
cross_match_next_addr_p = addr_p + charcnt;
for (j = 0; j < si->vcnt; j++) {
len = si->s_parms.s_chars.len[j];
cross[j].cnt = 0;
cross[j].addr_p = addr_p + longcnt * sizeof(long) - (len - 1);
for (i = 0; i < len - 1; i++)
cross[j].hit[i] = 0;
}
for (i = 0; i < charcnt; i++, ptr++, addr_p++) {
for (j = 0; j < si->vcnt; j++) {
target = si->s_parms.s_chars.value[j];
len = si->s_parms.s_chars.len[j];
if ((i + len) > charcnt) {
/* check for cross match */
if (!strncmp(target, ptr, charcnt - i)) {
cross[j].hit[len + i - charcnt - 1] = 1;
cross[j].cnt++;
}
} else {
if (!strncmp(target, ptr, len)) {
int slen = CHARS_CTX;
if ((i + CHARS_CTX) > charcnt)
slen = charcnt - i;
report_match_p(addr_p, ptr, slen, (char *)0, 0);
}
}
}
}
return addr_p;
}
static void
search_virtual(struct searchinfo *si)
{
ulong start, end;
ulong pp, next, *ubp;
int wordcnt, lastpage;
ulong page;
physaddr_t paddr;
char *pagebuf;
ulong pct, pages_read, pages_checked;
time_t begin, finish;
start = si->vaddr_start;
end = si->vaddr_end;
pages_read = pages_checked = 0;
begin = finish = 0;
pagebuf = GETBUF(PAGESIZE());
if (start & (sizeof(long)-1)) {
start &= ~(sizeof(long)-1);
error(INFO, "rounding down start address to: %lx\n", start);
}
if (CRASHDEBUG(1)) {
begin = time(NULL);
fprintf(fp, "search_virtual: start: %lx end: %lx\n",
start, end);
}
next = start;
for (pp = VIRTPAGEBASE(start); next < end; next = pp) {
pages_checked++;
lastpage = (VIRTPAGEBASE(next) == VIRTPAGEBASE(end));
if (LKCD_DUMPFILE())
set_lkcd_nohash();
/*
* Keep it virtual for Xen hypervisor.
*/
if (XEN_HYPER_MODE()) {
if (!readmem(pp, KVADDR, pagebuf, PAGESIZE(),
"search page", RETURN_ON_ERROR|QUIET)) {
if (CRASHDEBUG(1))
fprintf(fp,
"search suspended at: %lx\n", pp);
goto done;
}
goto virtual;
}
switch (si->memtype)
{
case UVADDR:
if (!uvtop(CURRENT_CONTEXT(), pp, &paddr, 0) ||
!phys_to_page(paddr, &page)) {
if (!next_upage(CURRENT_CONTEXT(), pp, &pp))
goto done;
continue;
}
break;
case KVADDR:
if (!kvtop(CURRENT_CONTEXT(), pp, &paddr, 0) ||
!phys_to_page(paddr, &page)) {
if (!next_kpage(pp, &pp))
goto done;
continue;
}
break;
}
if (!readmem(paddr, PHYSADDR, pagebuf, PAGESIZE(),
"search page", RETURN_ON_ERROR|QUIET)) {
pp += PAGESIZE();
continue;
}
virtual:
pages_read++;
ubp = (ulong *)&pagebuf[next - pp];
if (lastpage) {
if (end == (ulong)(-1))
wordcnt = PAGESIZE()/sizeof(long);
else
wordcnt = (end - next)/sizeof(long);
} else
wordcnt = (PAGESIZE() - (next - pp))/sizeof(long);
switch (si->mode)
{
case SEARCH_ULONG:
next = search_ulong(ubp, next, wordcnt, si);
break;
case SEARCH_UINT:
next = search_uint(ubp, next, wordcnt, si);
break;
case SEARCH_USHORT:
next = search_ushort(ubp, next, wordcnt, si);
break;
case SEARCH_CHARS:
next = search_chars(ubp, next, wordcnt, si);
break;
default:
/* unimplemented search type */
next += wordcnt * (sizeof(long));
break;
}
if (CRASHDEBUG(1))
if ((pp % (1024*1024)) == 0)
console("%lx\n", pp);
pp += PAGESIZE();
}
done:
if (CRASHDEBUG(1)) {
finish = time(NULL);
pct = (pages_read * 100)/pages_checked;
fprintf(fp,
"search_virtual: read %ld (%ld%%) of %ld pages checked in %ld seconds\n",
pages_read, pct, pages_checked, finish - begin);
}
}
static void
search_physical(struct searchinfo *si)
{
ulonglong start_in, end_in;
ulong *ubp;
int wordcnt, lastpage;
ulonglong pnext, ppp;
char *pagebuf;
ulong pct, pages_read, pages_checked;
time_t begin, finish;
ulong page;
start_in = si->paddr_start;
end_in = si->paddr_end;
pages_read = pages_checked = 0;
begin = finish = 0;
pagebuf = GETBUF(PAGESIZE());
if (start_in & (sizeof(ulonglong)-1)) {
start_in &= ~(sizeof(ulonglong)-1);
error(INFO, "rounding down start address to: %llx\n",
(ulonglong)start_in);
}
if (CRASHDEBUG(1)) {
begin = time(NULL);
fprintf(fp, "search_physical: start: %llx end: %llx\n",
start_in, end_in);
}
pnext = start_in;
for (ppp = PHYSPAGEBASE(start_in); pnext < end_in; pnext = ppp) {
pages_checked++;
lastpage = (PHYSPAGEBASE(pnext) == PHYSPAGEBASE(end_in));
if (LKCD_DUMPFILE())
set_lkcd_nohash();
if (!phys_to_page(ppp, &page) ||
!readmem(ppp, PHYSADDR, pagebuf, PAGESIZE(),
"search page", RETURN_ON_ERROR|QUIET)) {
if (!next_physpage(ppp, &ppp))
break;
continue;
}
pages_read++;
ubp = (ulong *)&pagebuf[pnext - ppp];
if (lastpage) {
if (end_in == (ulonglong)(-1))
wordcnt = PAGESIZE()/sizeof(long);
else
wordcnt = (end_in - pnext)/sizeof(long);
} else
wordcnt = (PAGESIZE() - (pnext - ppp))/sizeof(long);
switch (si->mode)
{
case SEARCH_ULONG:
pnext = search_ulong_p(ubp, pnext, wordcnt, si);
break;
case SEARCH_UINT:
pnext = search_uint_p(ubp, pnext, wordcnt, si);
break;
case SEARCH_USHORT:
pnext = search_ushort_p(ubp, pnext, wordcnt, si);
break;
case SEARCH_CHARS:
pnext = search_chars_p(ubp, pnext, wordcnt, si);
break;
default:
/* unimplemented search type */
pnext += wordcnt * (sizeof(long));
break;
}
ppp += PAGESIZE();
}
if (CRASHDEBUG(1)) {
finish = time(NULL);
pct = (pages_read * 100)/pages_checked;
fprintf(fp,
"search_physical: read %ld (%ld%%) of %ld pages checked in %ld seconds\n",
pages_read, pct, pages_checked, finish - begin);
}
}
/*
* Return the next mapped user virtual address page that comes after
* the passed-in address.
*/
static int
next_upage(struct task_context *tc, ulong vaddr, ulong *nextvaddr)
{
ulong vma, total_vm;
char *vma_buf;
ulong vm_start, vm_end;
ulong vm_next;
if (!tc->mm_struct)
return FALSE;
fill_mm_struct(tc->mm_struct);
vma = ULONG(tt->mm_struct + OFFSET(mm_struct_mmap));
total_vm = ULONG(tt->mm_struct + OFFSET(mm_struct_total_vm));
if (!vma || (total_vm == 0))
return FALSE;
vaddr = VIRTPAGEBASE(vaddr) + PAGESIZE(); /* first possible page */
for ( ; vma; vma = vm_next) {
vma_buf = fill_vma_cache(vma);
vm_start = ULONG(vma_buf + OFFSET(vm_area_struct_vm_start));
vm_end = ULONG(vma_buf + OFFSET(vm_area_struct_vm_end));
vm_next = ULONG(vma_buf + OFFSET(vm_area_struct_vm_next));
if (vaddr <= vm_start) {
*nextvaddr = vm_start;
return TRUE;
}
if ((vaddr > vm_start) && (vaddr < vm_end)) {
*nextvaddr = vaddr;
return TRUE;
}
}
return FALSE;
}
/*
* Return the next mapped kernel virtual address in the vmlist
* that is equal to or comes after the passed-in address.
* Prevent repeated calls to dump_vmlist() by only doing it
* one time for dumpfiles, or one time per (active) command.
*/
static int
next_vmlist_vaddr(ulong vaddr, ulong *nextvaddr)
{
int i, retval;
ulong cnt;
struct meminfo meminfo, *mi;
static int count = 0;
static struct vmlist *vmlist = NULL;
static ulong cmdgencur = BADVAL;
/*
* Search the stashed vmlist if possible.
*/
if (vmlist && ACTIVE()) {
if (pc->cmdgencur != cmdgencur) {
free(vmlist);
vmlist = NULL;
}
}
if (vmlist) {
for (i = 0, retval = FALSE; i < count; i++) {
if (vaddr <= vmlist[i].addr) {
*nextvaddr = vmlist[i].addr;
retval = TRUE;
break;
}
if (vaddr < (vmlist[i].addr + vmlist[i].size)) {
*nextvaddr = vaddr;
retval = TRUE;
break;
}
}
return retval;
}
mi = &meminfo;
BZERO(mi, sizeof(struct meminfo));
mi->flags = GET_VMLIST_COUNT;
dump_vmlist(mi);
cnt = mi->retval;
if (!cnt)
return FALSE;
mi->vmlist = (struct vmlist *)GETBUF(sizeof(struct vmlist)*cnt);
mi->flags = GET_VMLIST;
dump_vmlist(mi);
for (i = 0, retval = FALSE; i < cnt; i++) {
if (vaddr <= mi->vmlist[i].addr) {
*nextvaddr = mi->vmlist[i].addr;
retval = TRUE;
break;
}
if (vaddr < (mi->vmlist[i].addr + mi->vmlist[i].size)) {
*nextvaddr = vaddr;
retval = TRUE;
break;
}
}
if (!vmlist) {
vmlist = (struct vmlist *)
malloc(sizeof(struct vmlist)*cnt);
if (vmlist) {
BCOPY(mi->vmlist, vmlist,
sizeof(struct vmlist)*cnt);
count = cnt;
cmdgencur = pc->cmdgencur;
}
}
FREEBUF(mi->vmlist);
return retval;
}
/*
* Determine whether a virtual address is inside a vmlist segment.
*/
int
in_vmlist_segment(ulong vaddr)
{
ulong next;
if (next_vmlist_vaddr(vaddr, &next) &&
(vaddr == next))
return TRUE;
return FALSE;
}
/*
* Return the next kernel module virtual address that is
* equal to or comes after the passed-in address.
*/
static int
next_module_vaddr(ulong vaddr, ulong *nextvaddr)
{
int i;
ulong start, end;
struct load_module *lm;
for (i = 0; i < st->mods_installed; i++) {
lm = &st->load_modules[i];
start = lm->mod_base;
end = lm->mod_base + lm->mod_size;
if (vaddr >= end)
continue;
/*
* Either below or in this module.
*/
if (vaddr < start)
*nextvaddr = start;
else
*nextvaddr = vaddr;
return TRUE;
}
return FALSE;
}
/*
* Return the next kernel virtual address page in a designated
* kernel virtual address range that comes after the passed-in,
* untranslatable, address.
*/
static int
next_kpage(ulong vaddr, ulong *nextvaddr)
{
ulong vaddr_orig;
vaddr_orig = vaddr;
vaddr = VIRTPAGEBASE(vaddr) + PAGESIZE(); /* first possible page */
if (vaddr < vaddr_orig) /* wrapped back to zero? */
return FALSE;
switch (pc->curcmd_private)
{
case KVADDR_UNITY_MAP:
return next_identity_mapping(vaddr, nextvaddr);
case KVADDR_VMALLOC:
return next_vmlist_vaddr(vaddr, nextvaddr);
case KVADDR_VMEMMAP:
*nextvaddr = vaddr;
return TRUE;
case KVADDR_START_MAP:
*nextvaddr = vaddr;
return TRUE;
case KVADDR_MODULES:
return next_module_vaddr(vaddr, nextvaddr);
}
return FALSE;
}
/*
* Return the next physical address page that comes after
* the passed-in, unreadable, address.
*/
static int
next_physpage(ulonglong paddr, ulonglong *nextpaddr)
{
int n;
ulonglong node_start;
ulonglong node_end;
struct node_table *nt;
for (n = 0; n < vt->numnodes; n++) {
nt = &vt->node_table[n];
node_start = nt->start_paddr;
node_end = nt->start_paddr + (nt->size * PAGESIZE());
if (paddr >= node_end)
continue;
if (paddr < node_start) {
*nextpaddr = node_start;
return TRUE;
}
if (paddr < node_end) {
*nextpaddr = paddr + PAGESIZE();
return TRUE;
}
}
return FALSE;
}
/*
* Display swap statistics.
*/
void
cmd_swap(void)
{
int c;
while ((c = getopt(argcnt, args, "")) != EOF) {
switch(c)
{
default:
argerrs++;
break;
}
}
if (argerrs)
cmd_usage(pc->curcmd, SYNOPSIS);
dump_swap_info(VERBOSE, NULL, NULL);
}
/*
* Do the work for cmd_swap().
*/
#define SWP_USED 1
#define SWAP_MAP_BAD 0x8000
char *swap_info_hdr = \
"SWAP_INFO_STRUCT TYPE SIZE USED PCT PRI FILENAME\n";
static int
dump_swap_info(ulong swapflags, ulong *totalswap_pages, ulong *totalused_pages)
{
int i, j;
int swap_device, prio;
ulong pages, usedswap;
ulong flags, swap_file, max, swap_map, pct;
ulong vfsmnt;
ulong swap_info, swap_info_ptr;
ushort *smap;
ulong inuse_pages, totalswap, totalused;
char *devname;
char buf[BUFSIZE];
char buf1[BUFSIZE];
char buf2[BUFSIZE];
char buf3[BUFSIZE];
char buf4[BUFSIZE];
char buf5[BUFSIZE];
if (!symbol_exists("nr_swapfiles"))
error(FATAL, "nr_swapfiles doesn't exist in this kernel!\n");
if (!symbol_exists("swap_info"))
error(FATAL, "swap_info doesn't exist in this kernel!\n");
swap_info_init();
swap_info = symbol_value("swap_info");
if (swapflags & VERBOSE)
fprintf(fp, "%s", swap_info_hdr);
totalswap = totalused = 0;
for (i = 0; i < vt->nr_swapfiles; i++,
swap_info += (vt->flags & SWAPINFO_V1 ?
SIZE(swap_info_struct) : sizeof(void *))) {
if (vt->flags & SWAPINFO_V2) {
if (!readmem(swap_info, KVADDR, &swap_info_ptr,
sizeof(void *), "swap_info pointer",
QUIET|RETURN_ON_ERROR))
continue;
if (!swap_info_ptr)
continue;
fill_swap_info(swap_info_ptr);
} else
fill_swap_info(swap_info);
if (MEMBER_SIZE("swap_info_struct", "flags") == sizeof(uint))
flags = UINT(vt->swap_info_struct +
OFFSET(swap_info_struct_flags));
else
flags = ULONG(vt->swap_info_struct +
OFFSET(swap_info_struct_flags));
if (!(flags & SWP_USED))
continue;
swap_file = ULONG(vt->swap_info_struct +
OFFSET(swap_info_struct_swap_file));
swap_device = INT(vt->swap_info_struct +
OFFSET_OPTION(swap_info_struct_swap_device,
swap_info_struct_old_block_size));
pages = INT(vt->swap_info_struct +
OFFSET(swap_info_struct_pages));
totalswap += pages;
pages <<= (PAGESHIFT() - 10);
inuse_pages = 0;
if (MEMBER_SIZE("swap_info_struct", "prio") == sizeof(short))
prio = SHORT(vt->swap_info_struct +
OFFSET(swap_info_struct_prio));
else
prio = INT(vt->swap_info_struct +
OFFSET(swap_info_struct_prio));
if (MEMBER_SIZE("swap_info_struct", "max") == sizeof(int))
max = UINT(vt->swap_info_struct +
OFFSET(swap_info_struct_max));
else
max = ULONG(vt->swap_info_struct +
OFFSET(swap_info_struct_max));
if (VALID_MEMBER(swap_info_struct_inuse_pages)) {
if (MEMBER_SIZE("swap_info_struct", "inuse_pages") == sizeof(int))
inuse_pages = UINT(vt->swap_info_struct +
OFFSET(swap_info_struct_inuse_pages));
else
inuse_pages = ULONG(vt->swap_info_struct +
OFFSET(swap_info_struct_inuse_pages));
}
swap_map = ULONG(vt->swap_info_struct +
OFFSET(swap_info_struct_swap_map));
if (swap_file) {
if (VALID_MEMBER(swap_info_struct_swap_vfsmnt)) {
vfsmnt = ULONG(vt->swap_info_struct +
OFFSET(swap_info_struct_swap_vfsmnt));
get_pathname(swap_file, buf, BUFSIZE,
1, vfsmnt);
} else if (VALID_MEMBER
(swap_info_struct_old_block_size)) {
devname = vfsmount_devname(file_to_vfsmnt(swap_file),
buf1, BUFSIZE);
get_pathname(file_to_dentry(swap_file),
buf, BUFSIZE, 1, file_to_vfsmnt(swap_file));
if ((STREQ(devname, "devtmpfs") || STREQ(devname, "udev"))
&& !STRNEQ(buf, "/dev/"))
string_insert("/dev", buf);
} else {
get_pathname(swap_file, buf, BUFSIZE, 1, 0);
}
} else
sprintf(buf, "(unknown)");
smap = NULL;
if (vt->flags & SWAPINFO_V1) {
smap = (ushort *)GETBUF(sizeof(ushort) * max);
if (!readmem(swap_map, KVADDR, smap,
sizeof(ushort) * max, "swap_info swap_map data",
RETURN_ON_ERROR|QUIET)) {
if (swapflags & RETURN_ON_ERROR) {
*totalswap_pages = swap_map;
*totalused_pages = i;
FREEBUF(smap);
return FALSE;
} else
error(FATAL,
"swap_info[%d].swap_map at %lx is inaccessible\n",
i, swap_map);
}
}
usedswap = 0;
if (smap) {
for (j = 0; j < max; j++) {
switch (smap[j])
{
case SWAP_MAP_BAD:
case 0:
continue;
default:
usedswap++;
}
}
FREEBUF(smap);
} else
usedswap = inuse_pages;
totalused += usedswap;
usedswap <<= (PAGESHIFT() - 10);
pct = (usedswap * 100)/pages;
if (swapflags & VERBOSE) {
sprintf(buf1, "%lx", (vt->flags & SWAPINFO_V2) ?
swap_info_ptr : swap_info);
sprintf(buf2, "%ldk", pages);
sprintf(buf3, "%ldk", usedswap);
sprintf(buf4, "%2ld%%", pct);
sprintf(buf5, "%d", prio);
fprintf(fp, "%s %s %s %s %s %s %s\n",
mkstring(buf1,
MAX(VADDR_PRLEN, strlen("SWAP_INFO_STRUCT")),
CENTER|LJUST, NULL),
swap_device ? "PARTITION" : " FILE ",
mkstring(buf2, 10, CENTER|RJUST, NULL),
mkstring(buf3, 10, CENTER|RJUST, NULL),
mkstring(buf4, 4, CENTER|RJUST, NULL),
mkstring(buf5, 4, RJUST, NULL), buf);
}
}
if (totalswap_pages)
*totalswap_pages = totalswap;
if (totalused_pages)
*totalused_pages = totalused;
return TRUE;
}
/*
* Determine the swap_info_struct usage.
*/
static void
swap_info_init(void)
{
struct gnu_request *req;
if (vt->flags & (SWAPINFO_V1|SWAPINFO_V2))
return;
req = (struct gnu_request *)GETBUF(sizeof(struct gnu_request));
if ((get_symbol_type("swap_info", NULL, req) == TYPE_CODE_ARRAY) &&
((req->target_typecode == TYPE_CODE_PTR) ||
(req->target_typecode == TYPE_CODE_STRUCT))) {
switch (req->target_typecode)
{
case TYPE_CODE_STRUCT:
vt->flags |= SWAPINFO_V1;
break;
case TYPE_CODE_PTR:
vt->flags |= SWAPINFO_V2;
break;
}
} else {
if (THIS_KERNEL_VERSION >= LINUX(2,6,33))
vt->flags |= SWAPINFO_V2;
else
vt->flags |= SWAPINFO_V1;
}
FREEBUF(req);
}
/*
* Translate a PTE into a swap device and offset string.
*/
char *
swap_location(ulonglong pte, char *buf)
{
char swapdev[BUFSIZE];
if (!pte)
return NULL;
if (THIS_KERNEL_VERSION >= LINUX(2,6,0))
sprintf(buf, "%s OFFSET: %lld",
get_swapdev(__swp_type(pte), swapdev), __swp_offset(pte));
else
sprintf(buf, "%s OFFSET: %llx",
get_swapdev(SWP_TYPE(pte), swapdev), SWP_OFFSET(pte));
return buf;
}
/*
* Given the type field from a PTE, return the name of the swap device.
*/
static char *
get_swapdev(ulong type, char *buf)
{
unsigned int i, swap_info_len;
ulong swap_info, swap_info_ptr, swap_file;
ulong vfsmnt;
if (!symbol_exists("nr_swapfiles"))
error(FATAL, "nr_swapfiles doesn't exist in this kernel!\n");
if (!symbol_exists("swap_info"))
error(FATAL, "swap_info doesn't exist in this kernel!\n");
swap_info_init();
swap_info = symbol_value("swap_info");
swap_info_len = (i = ARRAY_LENGTH(swap_info)) ?
i : get_array_length("swap_info", NULL, 0);
sprintf(buf, "(unknown swap location)");
if (type >= swap_info_len)
return buf;
switch (vt->flags & (SWAPINFO_V1|SWAPINFO_V2))
{
case SWAPINFO_V1:
swap_info += type * SIZE(swap_info_struct);
fill_swap_info(swap_info);
break;
case SWAPINFO_V2:
swap_info += type * sizeof(void *);
if (!readmem(swap_info, KVADDR, &swap_info_ptr,
sizeof(void *), "swap_info pointer",
RETURN_ON_ERROR|QUIET))
return buf;
if (!swap_info_ptr)
return buf;
fill_swap_info(swap_info_ptr);
break;
}
swap_file = ULONG(vt->swap_info_struct +
OFFSET(swap_info_struct_swap_file));
if (swap_file) {
if (VALID_MEMBER(swap_info_struct_swap_vfsmnt)) {
vfsmnt = ULONG(vt->swap_info_struct +
OFFSET(swap_info_struct_swap_vfsmnt));
get_pathname(swap_file, buf, BUFSIZE, 1, vfsmnt);
} else if (VALID_MEMBER (swap_info_struct_old_block_size)) {
get_pathname(file_to_dentry(swap_file),
buf, BUFSIZE, 1, 0);
} else {
get_pathname(swap_file, buf, BUFSIZE, 1, 0);
}
}
return buf;
}
/*
* If not currently stashed, cache the passed-in swap_info_struct.
*/
static void
fill_swap_info(ulong swap_info)
{
if (vt->last_swap_read == swap_info)
return;
if (!vt->swap_info_struct && !(vt->swap_info_struct = (char *)
malloc(SIZE(swap_info_struct))))
error(FATAL, "cannot malloc swap_info_struct space\n");
readmem(swap_info, KVADDR, vt->swap_info_struct, SIZE(swap_info_struct),
"fill_swap_info", FAULT_ON_ERROR);
vt->last_swap_read = swap_info;
}
/*
* If active, clear references to the swap_info references.
*/
void
clear_swap_info_cache(void)
{
if (ACTIVE())
vt->last_swap_read = 0;
}
/*
* Translage a vm_area_struct and virtual address into a filename
* and offset string.
*/
#define PAGE_CACHE_SHIFT (machdep->pageshift) /* This is supposed to change! */
static char *
vma_file_offset(ulong vma, ulong vaddr, char *buf)
{
ulong vm_file, vm_start, vm_offset, vm_pgoff, dentry, offset;
ulong vfsmnt;
char file[BUFSIZE];
char *vma_buf, *file_buf;
if (!vma)
return NULL;
vma_buf = fill_vma_cache(vma);
vm_file = ULONG(vma_buf + OFFSET(vm_area_struct_vm_file));
if (!vm_file)
goto no_file_offset;
file_buf = fill_file_cache(vm_file);
dentry = ULONG(file_buf + OFFSET(file_f_dentry));
if (!dentry)
goto no_file_offset;
file[0] = NULLCHAR;
if (VALID_MEMBER(file_f_vfsmnt)) {
vfsmnt = ULONG(file_buf + OFFSET(file_f_vfsmnt));
get_pathname(dentry, file, BUFSIZE, 1, vfsmnt);
} else
get_pathname(dentry, file, BUFSIZE, 1, 0);
if (!strlen(file))
goto no_file_offset;
vm_start = ULONG(vma_buf + OFFSET(vm_area_struct_vm_start));
vm_offset = vm_pgoff = 0xdeadbeef;
if (VALID_MEMBER(vm_area_struct_vm_offset))
vm_offset = ULONG(vma_buf +
OFFSET(vm_area_struct_vm_offset));
else if (VALID_MEMBER(vm_area_struct_vm_pgoff))
vm_pgoff = ULONG(vma_buf +
OFFSET(vm_area_struct_vm_pgoff));
else
goto no_file_offset;
offset = 0;
if (vm_offset != 0xdeadbeef)
offset = VIRTPAGEBASE(vaddr) - vm_start + vm_offset;
else if (vm_pgoff != 0xdeadbeef) {
offset = ((vaddr - vm_start) >> PAGE_CACHE_SHIFT) + vm_pgoff;
offset <<= PAGE_CACHE_SHIFT;
}
sprintf(buf, "%s OFFSET: %lx", file, offset);
return buf;
no_file_offset:
return NULL;
}
/*
* Translate a PTE into its physical address and flags.
*/
void
cmd_pte(void)
{
int c;
ulonglong pte;
while ((c = getopt(argcnt, args, "")) != EOF) {
switch(c)
{
default:
argerrs++;
break;
}
}
if (argerrs)
cmd_usage(pc->curcmd, SYNOPSIS);
while (args[optind]) {
pte = htoll(args[optind], FAULT_ON_ERROR, NULL);
machdep->translate_pte((ulong)pte, NULL, pte);
optind++;
}
}
static char *node_zone_hdr = "ZONE NAME SIZE";
/*
* On systems supporting memory nodes, display the basic per-node data.
*/
static void
dump_memory_nodes(int initialize)
{
int i, j;
int n, id, node, flen, slen, badaddr;
ulong node_mem_map;
ulong temp_node_start_paddr;
ulonglong node_start_paddr;
ulong node_start_pfn;
ulong node_start_mapnr;
ulong node_spanned_pages, node_present_pages;
ulong free_pages, zone_size, node_size, cum_zone_size;
ulong zone_start_paddr, zone_start_mapnr, zone_mem_map;
physaddr_t phys;
ulong pp;
ulong zone_start_pfn;
ulong bdata;
ulong pgdat;
ulong node_zones;
ulong value;
char buf1[BUFSIZE];
char buf2[BUFSIZE];
char buf3[BUFSIZE];
char buf4[BUFSIZE];
char buf5[BUFSIZE];
struct node_table *nt;
node = slen = 0;
if (!(vt->flags & (NODES|NODES_ONLINE)) && initialize) {
nt = &vt->node_table[0];
nt->node_id = 0;
if (symbol_exists("contig_page_data"))
nt->pgdat = symbol_value("contig_page_data");
else
nt->pgdat = 0;
nt->size = vt->total_pages;
nt->mem_map = vt->mem_map;
nt->start_paddr = 0;
nt->start_mapnr = 0;
if (CRASHDEBUG(1)) {
fprintf(fp, "node_table[%d]: \n", 0);
fprintf(fp, " id: %d\n", nt->node_id);
fprintf(fp, " pgdat: %lx\n", nt->pgdat);
fprintf(fp, " size: %ld\n", nt->size);
fprintf(fp, " present: %ld\n", nt->present);
fprintf(fp, " mem_map: %lx\n", nt->mem_map);
fprintf(fp, " start_paddr: %llx\n", nt->start_paddr);
fprintf(fp, " start_mapnr: %ld\n", nt->start_mapnr);
}
return;
}
if (initialize) {
pgdat = UNINITIALIZED;
/*
* This order may have to change based upon architecture...
*/
if (symbol_exists("pgdat_list") &&
(VALID_MEMBER(pglist_data_node_next) ||
VALID_MEMBER(pglist_data_pgdat_next))) {
get_symbol_data("pgdat_list", sizeof(void *), &pgdat);
vt->flags &= ~NODES_ONLINE;
} else if (vt->flags & NODES_ONLINE) {
if ((node = next_online_node(0)) < 0) {
error(WARNING,
"cannot determine first node from node_online_map\n\n");
return;
}
if (!(pgdat = next_online_pgdat(node))) {
error(WARNING,
"cannot determine pgdat list for this kernel/architecture\n\n");
return;
}
}
} else
pgdat = vt->node_table[0].pgdat;
if (initialize && (pgdat == UNINITIALIZED)) {
error(WARNING, "cannot initialize pgdat list\n\n");
return;
}
for (n = 0, badaddr = FALSE; pgdat; n++) {
if (n >= vt->numnodes)
error(FATAL, "numnodes out of sync with pgdat_list?\n");
nt = &vt->node_table[n];
readmem(pgdat+OFFSET(pglist_data_node_id), KVADDR, &id,
sizeof(int), "pglist node_id", FAULT_ON_ERROR);
if (VALID_MEMBER(pglist_data_node_mem_map)) {
readmem(pgdat+OFFSET(pglist_data_node_mem_map), KVADDR,
&node_mem_map, sizeof(ulong),
"node_mem_map", FAULT_ON_ERROR);
} else {
node_mem_map = BADADDR;
badaddr = TRUE;
}
if (VALID_MEMBER(pglist_data_node_start_paddr)) {
readmem(pgdat+OFFSET(pglist_data_node_start_paddr),
KVADDR, &temp_node_start_paddr, sizeof(ulong),
"pglist node_start_paddr", FAULT_ON_ERROR);
node_start_paddr = temp_node_start_paddr;
}
else if (VALID_MEMBER(pglist_data_node_start_pfn)) {
readmem(pgdat+OFFSET(pglist_data_node_start_pfn),
KVADDR, &node_start_pfn, sizeof(ulong),
"pglist node_start_pfn", FAULT_ON_ERROR);
node_start_mapnr = node_start_pfn;
node_start_paddr = PTOB(node_start_pfn);
if (badaddr && IS_SPARSEMEM()) {
if (!verify_pfn(node_start_pfn))
error(WARNING, "questionable node_start_pfn: %lx\n",
node_start_pfn);
phys = PTOB(node_start_pfn);
if (phys_to_page(phys, &pp))
node_mem_map = pp;
}
} else error(INFO,
"cannot determine zone starting physical address\n");
if (VALID_MEMBER(pglist_data_node_start_mapnr))
readmem(pgdat+OFFSET(pglist_data_node_start_mapnr),
KVADDR, &node_start_mapnr, sizeof(ulong),
"pglist node_start_mapnr", FAULT_ON_ERROR);
if (VALID_MEMBER(pglist_data_node_size))
readmem(pgdat+OFFSET(pglist_data_node_size),
KVADDR, &node_size, sizeof(ulong),
"pglist node_size", FAULT_ON_ERROR);
else if (VALID_MEMBER(pglist_data_node_spanned_pages)) {
readmem(pgdat+OFFSET(pglist_data_node_spanned_pages),
KVADDR, &node_spanned_pages, sizeof(ulong),
"pglist node_spanned_pages", FAULT_ON_ERROR);
node_size = node_spanned_pages;
} else error(INFO, "cannot determine zone size\n");
if (VALID_MEMBER(pglist_data_node_present_pages))
readmem(pgdat+OFFSET(pglist_data_node_present_pages),
KVADDR, &node_present_pages, sizeof(ulong),
"pglist node_present_pages", FAULT_ON_ERROR);
else
node_present_pages = 0;
if (VALID_MEMBER(pglist_data_bdata))
readmem(pgdat+OFFSET(pglist_data_bdata), KVADDR, &bdata,
sizeof(ulong), "pglist bdata", FAULT_ON_ERROR);
else
bdata = BADADDR;
if (initialize) {
nt->node_id = id;
nt->pgdat = pgdat;
if (VALID_MEMBER(zone_struct_memsize))
nt->size = 0; /* initialize below */
else
nt->size = node_size;
nt->present = node_present_pages;
nt->mem_map = node_mem_map;
nt->start_paddr = node_start_paddr;
nt->start_mapnr = node_start_mapnr;
if (CRASHDEBUG(1)) {
fprintf(fp, "node_table[%d]: \n", n);
fprintf(fp, " id: %d\n", nt->node_id);
fprintf(fp, " pgdat: %lx\n", nt->pgdat);
fprintf(fp, " size: %ld\n", nt->size);
fprintf(fp, " present: %ld\n", nt->present);
fprintf(fp, " mem_map: %lx\n", nt->mem_map);
fprintf(fp, " start_paddr: %llx\n", nt->start_paddr);
fprintf(fp, " start_mapnr: %ld\n", nt->start_mapnr);
}
}
if (!initialize) {
if (n) {
fprintf(fp, "\n");
pad_line(fp, slen, '-');
}
flen = MAX(VADDR_PRLEN, strlen("BOOTMEM_DATA"));
fprintf(fp, "%sNODE %s %s %s %s\n",
n ? "\n\n" : "",
mkstring(buf1, 8, CENTER, "SIZE"),
mkstring(buf2, flen, CENTER|LJUST, "PGLIST_DATA"),
mkstring(buf3, flen, CENTER|LJUST, "BOOTMEM_DATA"),
mkstring(buf4, flen, CENTER|LJUST, "NODE_ZONES"));
node_zones = pgdat + OFFSET(pglist_data_node_zones);
sprintf(buf5, " %2d %s %s %s %s\n", id,
mkstring(buf1, 8, CENTER|LJUST|LONG_DEC,
MKSTR(node_size)),
mkstring(buf2, flen, CENTER|LJUST|LONG_HEX,
MKSTR(pgdat)),
bdata == BADADDR ?
mkstring(buf3, flen, CENTER, "----") :
mkstring(buf3, flen, CENTER|LONG_HEX, MKSTR(bdata)),
mkstring(buf4, flen, CENTER|LJUST|LONG_HEX,
MKSTR(node_zones)));
fprintf(fp, "%s", buf5);
j = 12 + strlen(buf1) + strlen(buf2) + strlen(buf3) +
count_leading_spaces(buf4);
for (i = 1; i < vt->nr_zones; i++) {
node_zones += SIZE_OPTION(zone_struct, zone);
INDENT(j);
fprintf(fp, "%lx\n", node_zones);
}
fprintf(fp, "%s START_PADDR START_MAPNR\n",
mkstring(buf1, VADDR_PRLEN, CENTER|LJUST,
"MEM_MAP"));
fprintf(fp, "%s %s %s\n",
mkstring(buf1, VADDR_PRLEN,
CENTER|LONG_HEX, MKSTR(node_mem_map)),
mkstring(buf2, strlen(" START_PADDR "),
CENTER|LONGLONG_HEX|RJUST, MKSTR(&node_start_paddr)),
mkstring(buf3, strlen("START_MAPNR"),
CENTER|LONG_DEC|RJUST,
MKSTR(node_start_mapnr)));
sprintf(buf2, "%s %s START_PADDR START_MAPNR",
node_zone_hdr,
mkstring(buf1, VADDR_PRLEN, CENTER|RJUST,
"MEM_MAP"));
slen = strlen(buf2);
fprintf(fp, "\n%s\n", buf2);
}
node_zones = pgdat + OFFSET(pglist_data_node_zones);
cum_zone_size = 0;
for (i = 0; i < vt->nr_zones; i++) {
if (CRASHDEBUG(7))
fprintf(fp, "zone %d at %lx\n", i, node_zones);
if (VALID_MEMBER(zone_struct_size))
readmem(node_zones+OFFSET(zone_struct_size),
KVADDR, &zone_size, sizeof(ulong),
"zone_struct size", FAULT_ON_ERROR);
else if (VALID_MEMBER(zone_struct_memsize)) {
readmem(node_zones+OFFSET(zone_struct_memsize),
KVADDR, &zone_size, sizeof(ulong),
"zone_struct memsize", FAULT_ON_ERROR);
nt->size += zone_size;
} else if (VALID_MEMBER(zone_spanned_pages)) {
readmem(node_zones+ OFFSET(zone_spanned_pages),
KVADDR, &zone_size, sizeof(ulong),
"zone spanned_pages", FAULT_ON_ERROR);
} else error(FATAL,
"zone_struct has neither size nor memsize field\n");
readmem(node_zones+
OFFSET_OPTION(zone_struct_free_pages,
zone_free_pages), KVADDR, &free_pages,
sizeof(ulong), "zone[_struct] free_pages",
FAULT_ON_ERROR);
readmem(node_zones+OFFSET_OPTION(zone_struct_name,
zone_name), KVADDR, &value, sizeof(void *),
"zone[_struct] name", FAULT_ON_ERROR);
if (!read_string(value, buf1, BUFSIZE-1))
sprintf(buf1, "(unknown) ");
if (VALID_STRUCT(zone_struct)) {
if (VALID_MEMBER(zone_struct_zone_start_paddr))
{
readmem(node_zones+OFFSET
(zone_struct_zone_start_paddr),
KVADDR, &zone_start_paddr,
sizeof(ulong),
"node_zones zone_start_paddr",
FAULT_ON_ERROR);
} else {
readmem(node_zones+
OFFSET(zone_struct_zone_start_pfn),
KVADDR, &zone_start_pfn,
sizeof(ulong),
"node_zones zone_start_pfn",
FAULT_ON_ERROR);
zone_start_paddr =
PTOB(zone_start_pfn);
}
readmem(node_zones+
OFFSET(zone_struct_zone_start_mapnr),
KVADDR, &zone_start_mapnr,
sizeof(ulong),
"node_zones zone_start_mapnr",
FAULT_ON_ERROR);
} else {
readmem(node_zones+
OFFSET(zone_zone_start_pfn),
KVADDR, &zone_start_pfn,
sizeof(ulong),
"node_zones zone_start_pfn",
FAULT_ON_ERROR);
zone_start_paddr = PTOB(zone_start_pfn);
if (IS_SPARSEMEM()) {
zone_mem_map = 0;
zone_start_mapnr = 0;
if (zone_size) {
phys = PTOB(zone_start_pfn);
zone_start_mapnr = phys/PAGESIZE();
}
} else if (!(vt->flags & NODES) &&
INVALID_MEMBER(zone_zone_mem_map)) {
readmem(pgdat+OFFSET(pglist_data_node_mem_map),
KVADDR, &zone_mem_map, sizeof(void *),
"contig_page_data mem_map", FAULT_ON_ERROR);
if (zone_size)
zone_mem_map += cum_zone_size * SIZE(page);
} else readmem(node_zones+
OFFSET(zone_zone_mem_map),
KVADDR, &zone_mem_map,
sizeof(ulong),
"node_zones zone_mem_map",
FAULT_ON_ERROR);
if (zone_mem_map)
zone_start_mapnr =
(zone_mem_map - node_mem_map) /
SIZE(page);
else if (!IS_SPARSEMEM())
zone_start_mapnr = 0;
}
if (IS_SPARSEMEM()) {
zone_mem_map = 0;
if (zone_size) {
phys = PTOB(zone_start_pfn);
if (phys_to_page(phys, &pp))
zone_mem_map = pp;
}
} else if (!(vt->flags & NODES) &&
INVALID_MEMBER(zone_struct_zone_mem_map) &&
INVALID_MEMBER(zone_zone_mem_map)) {
readmem(pgdat+OFFSET(pglist_data_node_mem_map),
KVADDR, &zone_mem_map, sizeof(void *),
"contig_page_data mem_map", FAULT_ON_ERROR);
if (zone_size)
zone_mem_map += cum_zone_size * SIZE(page);
else
zone_mem_map = 0;
} else
readmem(node_zones+
OFFSET_OPTION(zone_struct_zone_mem_map,
zone_zone_mem_map), KVADDR, &zone_mem_map,
sizeof(ulong), "node_zones zone_mem_map",
FAULT_ON_ERROR);
if (!initialize) {
fprintf(fp, " %2d %-9s %7ld ",
i, buf1, zone_size);
cum_zone_size += zone_size;
fprintf(fp, "%s %s %s\n",
mkstring(buf1, VADDR_PRLEN,
RJUST|LONG_HEX,MKSTR(zone_mem_map)),
mkstring(buf2, strlen("START_PADDR"),
LONG_HEX|RJUST,MKSTR(zone_start_paddr)),
mkstring(buf3, strlen("START_MAPNR"),
LONG_DEC|RJUST,
MKSTR(zone_start_mapnr)));
}
node_zones += SIZE_OPTION(zone_struct, zone);
}
if (initialize) {
if (vt->flags & NODES_ONLINE) {
if ((node = next_online_node(node+1)) < 0)
pgdat = 0;
else if (!(pgdat = next_online_pgdat(node))) {
error(WARNING,
"cannot determine pgdat list for this kernel/architecture (node %d)\n\n",
node);
pgdat = 0;
}
} else
readmem(pgdat + OFFSET_OPTION(pglist_data_node_next,
pglist_data_pgdat_next), KVADDR,
&pgdat, sizeof(void *), "pglist_data node_next",
FAULT_ON_ERROR);
} else {
if ((n+1) < vt->numnodes)
pgdat = vt->node_table[n+1].pgdat;
else
pgdat = 0;
}
}
if (n != vt->numnodes) {
if (CRASHDEBUG(2))
error(NOTE, "changing numnodes from %d to %d\n",
vt->numnodes, n);
vt->numnodes = n;
}
if (!initialize && IS_SPARSEMEM())
dump_mem_sections();
}
/*
* At least verify that page-shifted physical address.
*/
static int
verify_pfn(ulong pfn)
{
int i;
physaddr_t mask;
if (!machdep->max_physmem_bits)
return TRUE;
mask = 0;
for (i = machdep->max_physmem_bits; i < machdep->bits; i++)
mask |= ((physaddr_t)1 << i);
if (mask & PTOB(pfn))
return FALSE;
return TRUE;
}
static void
dump_zone_stats(void)
{
int i, n;
ulong pgdat, node_zones;
char *zonebuf;
char buf1[BUFSIZE];
int ivalue;
ulong value1;
ulong value2;
ulong value3;
ulong value4;
ulong value5;
ulong value6;
long min, low, high;
value1 = value2 = value3 = value4 = value5 = value6 = 0;
min = low = high = 0;
pgdat = vt->node_table[0].pgdat;
zonebuf = GETBUF(SIZE_OPTION(zone_struct, zone));
vm_stat_init();
for (n = 0; pgdat; n++) {
node_zones = pgdat + OFFSET(pglist_data_node_zones);
for (i = 0; i < vt->nr_zones; i++) {
if (!readmem(node_zones, KVADDR, zonebuf,
SIZE_OPTION(zone_struct, zone),
"zone buffer", FAULT_ON_ERROR))
break;
value1 = ULONG(zonebuf +
OFFSET_OPTION(zone_struct_name, zone_name));
if (!read_string(value1, buf1, BUFSIZE-1))
sprintf(buf1, "(unknown) ");
if (VALID_MEMBER(zone_struct_size))
value1 = value6 = ULONG(zonebuf +
OFFSET(zone_struct_size));
else if (VALID_MEMBER(zone_struct_memsize)) {
value1 = value6 = ULONG(zonebuf +
OFFSET(zone_struct_memsize));
} else if (VALID_MEMBER(zone_spanned_pages)) {
value1 = ULONG(zonebuf +
OFFSET(zone_spanned_pages));
value6 = ULONG(zonebuf +
OFFSET(zone_present_pages));
} else error(FATAL,
"zone struct has unknown size field\n");
if (VALID_MEMBER(zone_watermark)) {
if (!enumerator_value("WMARK_MIN", &min) ||
!enumerator_value("WMARK_LOW", &low) ||
!enumerator_value("WMARK_HIGH", &high)) {
min = 0;
low = 1;
high = 2;
}
value2 = ULONG(zonebuf + OFFSET(zone_watermark) +
(sizeof(long) * min));
value3 = ULONG(zonebuf + OFFSET(zone_watermark) +
(sizeof(long) * low));
value4 = ULONG(zonebuf + OFFSET(zone_watermark) +
(sizeof(long) * high));
} else {
value2 = ULONG(zonebuf + OFFSET_OPTION(zone_pages_min,
zone_struct_pages_min));
value3 = ULONG(zonebuf + OFFSET_OPTION(zone_pages_low,
zone_struct_pages_low));
value4 = ULONG(zonebuf + OFFSET_OPTION(zone_pages_high,
zone_struct_pages_high));
}
value5 = ULONG(zonebuf + OFFSET_OPTION(zone_free_pages,
zone_struct_free_pages));
fprintf(fp,
"NODE: %d ZONE: %d ADDR: %lx NAME: \"%s\"\n",
n, i, node_zones, buf1);
if (!value1) {
fprintf(fp, " [unpopulated]\n");
goto next_zone;
}
fprintf(fp, " SIZE: %ld", value1);
if (value6 < value1)
fprintf(fp, " PRESENT: %ld", value6);
fprintf(fp, " MIN/LOW/HIGH: %ld/%ld/%ld",
value2, value3, value4);
if (VALID_MEMBER(zone_vm_stat))
dump_vm_stat("NR_FREE_PAGES", (long *)&value5,
node_zones + OFFSET(zone_vm_stat));
if (VALID_MEMBER(zone_nr_active) &&
VALID_MEMBER(zone_nr_inactive)) {
value1 = ULONG(zonebuf +
OFFSET(zone_nr_active));
value2 = ULONG(zonebuf +
OFFSET(zone_nr_inactive));
fprintf(fp,
"\n NR_ACTIVE: %ld NR_INACTIVE: %ld FREE: %ld\n",
value1, value2, value5);
if (VALID_MEMBER(zone_vm_stat)) {
fprintf(fp, " VM_STAT:\n");
dump_vm_stat(NULL, NULL, node_zones +
OFFSET(zone_vm_stat));
}
} else if (VALID_MEMBER(zone_vm_stat) &&
dump_vm_stat("NR_ACTIVE", (long *)&value1,
node_zones + OFFSET(zone_vm_stat)) &&
dump_vm_stat("NR_INACTIVE", (long *)&value2,
node_zones + OFFSET(zone_vm_stat))) {
fprintf(fp, "\n VM_STAT:\n");
dump_vm_stat(NULL, NULL, node_zones +
OFFSET(zone_vm_stat));
} else {
if (VALID_MEMBER(zone_vm_stat)) {
fprintf(fp, "\n VM_STAT:\n");
dump_vm_stat(NULL, NULL, node_zones +
OFFSET(zone_vm_stat));
} else
fprintf(fp, " FREE: %ld\n", value5);
goto next_zone;
}
if (VALID_MEMBER(zone_all_unreclaimable)) {
ivalue = UINT(zonebuf +
OFFSET(zone_all_unreclaimable));
fprintf(fp, " ALL_UNRECLAIMABLE: %s ",
ivalue ? "yes" : "no");
} else if (VALID_MEMBER(zone_flags) &&
enumerator_value("ZONE_ALL_UNRECLAIMABLE",
(long *)&value1)) {
value2 = ULONG(zonebuf + OFFSET(zone_flags));
value3 = value2 & (1 << value1);
fprintf(fp, " ALL_UNRECLAIMABLE: %s ",
value3 ? "yes" : "no");
}
if (VALID_MEMBER(zone_pages_scanned)) {
value1 = ULONG(zonebuf +
OFFSET(zone_pages_scanned));
fprintf(fp, "PAGES_SCANNED: %ld ", value1);
}
fprintf(fp, "\n");
next_zone:
fprintf(fp, "\n");
node_zones += SIZE_OPTION(zone_struct, zone);
}
if ((n+1) < vt->numnodes)
pgdat = vt->node_table[n+1].pgdat;
else
pgdat = 0;
}
FREEBUF(zonebuf);
}
/*
* Gather essential information regarding each memory node.
*/
static void
node_table_init(void)
{
int n;
ulong pgdat;
/*
* Override numnodes -- some kernels may leave it at 1 on a system
* with multiple memory nodes.
*/
if ((vt->flags & NODES) && (VALID_MEMBER(pglist_data_node_next) ||
VALID_MEMBER(pglist_data_pgdat_next))) {
get_symbol_data("pgdat_list", sizeof(void *), &pgdat);
for (n = 0; pgdat; n++) {
readmem(pgdat + OFFSET_OPTION(pglist_data_node_next,
pglist_data_pgdat_next), KVADDR,
&pgdat, sizeof(void *), "pglist_data node_next",
FAULT_ON_ERROR);
}
if (n != vt->numnodes) {
if (CRASHDEBUG(2))
error(NOTE, "changing numnodes from %d to %d\n",
vt->numnodes, n);
vt->numnodes = n;
}
} else
vt->flags &= ~NODES;
if (!(vt->node_table = (struct node_table *)
malloc(sizeof(struct node_table) * vt->numnodes)))
error(FATAL, "cannot malloc node_table %s(%d nodes)",
vt->numnodes > 1 ? "array " : "", vt->numnodes);
BZERO(vt->node_table, sizeof(struct node_table) * vt->numnodes);
dump_memory_nodes(MEMORY_NODES_INITIALIZE);
qsort((void *)vt->node_table, (size_t)vt->numnodes,
sizeof(struct node_table), compare_node_data);
if (CRASHDEBUG(2))
dump_memory_nodes(MEMORY_NODES_DUMP);
}
/*
* The comparison function must return an integer less than,
* equal to, or greater than zero if the first argument is
* considered to be respectively less than, equal to, or
* greater than the second. If two members compare as equal,
* their order in the sorted array is undefined.
*/
static int
compare_node_data(const void *v1, const void *v2)
{
struct node_table *t1, *t2;
t1 = (struct node_table *)v1;
t2 = (struct node_table *)v2;
return (t1->node_id < t2->node_id ? -1 :
t1->node_id == t2->node_id ? 0 : 1);
}
/*
* Depending upon the processor, and whether we're running live or on a
* dumpfile, get the system page size.
*/
uint
memory_page_size(void)
{
uint psz;
if (machdep->pagesize)
return machdep->pagesize;
if (REMOTE_MEMSRC())
return remote_page_size();
switch (pc->flags & MEMORY_SOURCES)
{
case DISKDUMP:
psz = diskdump_page_size();
break;
case XENDUMP:
psz = xendump_page_size();
break;
case KDUMP:
psz = kdump_page_size();
break;
case NETDUMP:
psz = netdump_page_size();
break;
case MCLXCD:
psz = (uint)mclx_page_size();
break;
case LKCD:
#if 0 /* REMIND: */
psz = lkcd_page_size(); /* dh_dump_page_size is HW page size; should add dh_page_size */
#else
psz = (uint)getpagesize();
#endif
break;
case DEVMEM:
case MEMMOD:
case CRASHBUILTIN:
case KVMDUMP:
case PROC_KCORE:
psz = (uint)getpagesize();
break;
case S390D:
psz = s390_page_size();
break;
case SADUMP:
psz = sadump_page_size();
break;
default:
psz = 0;
error(FATAL, "memory_page_size: invalid pc->flags: %lx\n",
pc->flags & MEMORY_SOURCES);
}
return psz;
}
/*
* If the page size cannot be determined by the dumpfile (like kdump),
* and the processor default cannot be used, allow the force-feeding
* of a crash command-line page size option.
*/
void
force_page_size(char *s)
{
int k, err;
ulong psize;
k = 1;
err = FALSE;
psize = 0;
switch (LASTCHAR(s))
{
case 'k':
case 'K':
LASTCHAR(s) = NULLCHAR;
if (!decimal(s, 0)) {
err = TRUE;
break;
}
k = 1024;
/* FALLTHROUGH */
default:
if (decimal(s, 0))
psize = dtol(s, QUIET|RETURN_ON_ERROR, &err);
else if (hexadecimal(s, 0))
psize = htol(s, QUIET|RETURN_ON_ERROR, &err);
else
err = TRUE;
break;
}
if (err)
error(INFO, "invalid page size: %s\n", s);
else
machdep->pagesize = psize * k;
}
/*
* Return the vmalloc address referenced by the first vm_struct
* on the vmlist. This can normally be used by the machine-specific
* xxx_vmalloc_start() routines.
*/
ulong
first_vmalloc_address(void)
{
static ulong vmalloc_start = 0;
ulong vm_struct, vmap_area;
if (DUMPFILE() && vmalloc_start)
return vmalloc_start;
if (vt->flags & USE_VMAP_AREA) {
get_symbol_data("vmap_area_list", sizeof(void *), &vmap_area);
if (!vmap_area)
return 0;
if (!readmem(vmap_area - OFFSET(vmap_area_list) +
OFFSET(vmap_area_va_start), KVADDR, &vmalloc_start,
sizeof(void *), "first vmap_area va_start", RETURN_ON_ERROR))
non_matching_kernel();
} else if (kernel_symbol_exists("vmlist")) {
get_symbol_data("vmlist", sizeof(void *), &vm_struct);
if (!vm_struct)
return 0;
if (!readmem(vm_struct+OFFSET(vm_struct_addr), KVADDR,
&vmalloc_start, sizeof(void *),
"first vmlist addr", RETURN_ON_ERROR))
non_matching_kernel();
}
return vmalloc_start;
}
/*
* Return the highest vmalloc address in the vmlist.
*/
ulong
last_vmalloc_address(void)
{
struct meminfo meminfo;
static ulong vmalloc_limit = 0;
if (!vmalloc_limit || ACTIVE()) {
BZERO(&meminfo, sizeof(struct meminfo));
meminfo.memtype = KVADDR;
meminfo.spec_addr = 0;
meminfo.flags = (ADDRESS_SPECIFIED|GET_HIGHEST);
dump_vmlist(&meminfo);
vmalloc_limit = meminfo.retval;
}
return vmalloc_limit;
}
/*
* Determine whether an identity-mapped virtual address
* refers to an existant physical page, and if not bump
* it up to the next node.
*/
static int
next_identity_mapping(ulong vaddr, ulong *nextvaddr)
{
int n, retval;
struct node_table *nt;
ulonglong paddr, pstart, psave, pend;
ulong node_size;
paddr = VTOP(vaddr);
psave = 0;
retval = FALSE;
for (n = 0; n < vt->numnodes; n++) {
nt = &vt->node_table[n];
if ((vt->flags & V_MEM_MAP) && (vt->numnodes == 1))
node_size = vt->max_mapnr;
else
node_size = nt->size;
pstart = nt->start_paddr;
pend = pstart + ((ulonglong)node_size * PAGESIZE());
/*
* Check the next node.
*/
if (paddr >= pend)
continue;
/*
* Bump up to the next node, but keep looking in
* case of non-sequential nodes.
*/
if (paddr < pstart) {
if (psave && (psave < pstart))
continue;
*nextvaddr = PTOV(pstart);
psave = pstart;
retval = TRUE;
continue;
}
/*
* We're in the physical range.
*/
*nextvaddr = vaddr;
retval = TRUE;
break;
}
return retval;
}
/*
* Return the L1 cache size in bytes, which can be found stored in the
* cache_cache.
*/
int
l1_cache_size(void)
{
ulong cache;
ulong c_align;
int colour_off;
int retval;
retval = -1;
if (VALID_MEMBER(kmem_cache_s_c_align)) {
cache = symbol_value("cache_cache");
readmem(cache+OFFSET(kmem_cache_s_c_align),
KVADDR, &c_align, sizeof(ulong),
"c_align", FAULT_ON_ERROR);
retval = (int)c_align;
} else if (VALID_MEMBER(kmem_cache_s_colour_off)) {
cache = symbol_value("cache_cache");
readmem(cache+OFFSET(kmem_cache_s_colour_off),
KVADDR, &colour_off, sizeof(int),
"colour_off", FAULT_ON_ERROR);
retval = colour_off;
}
return retval;
}
/*
* Multi-purpose routine used to query/control dumpfile memory usage.
*/
int
dumpfile_memory(int cmd)
{
int retval;
retval = 0;
switch (cmd)
{
case DUMPFILE_MEM_USED:
if (REMOTE_DUMPFILE())
retval = remote_memory_used();
else if (pc->flags & NETDUMP)
retval = netdump_memory_used();
else if (pc->flags & KDUMP)
retval = kdump_memory_used();
else if (pc->flags & XENDUMP)
retval = xendump_memory_used();
else if (pc->flags & KVMDUMP)
retval = kvmdump_memory_used();
else if (pc->flags & DISKDUMP)
retval = diskdump_memory_used();
else if (pc->flags & LKCD)
retval = lkcd_memory_used();
else if (pc->flags & MCLXCD)
retval = vas_memory_used();
else if (pc->flags & S390D)
retval = s390_memory_used();
else if (pc->flags & SADUMP)
retval = sadump_memory_used();
break;
case DUMPFILE_FREE_MEM:
if (REMOTE_DUMPFILE())
retval = remote_free_memory();
else if (pc->flags & NETDUMP)
retval = netdump_free_memory();
else if (pc->flags & KDUMP)
retval = kdump_free_memory();
else if (pc->flags & XENDUMP)
retval = xendump_free_memory();
else if (pc->flags & KVMDUMP)
retval = kvmdump_free_memory();
else if (pc->flags & DISKDUMP)
retval = diskdump_free_memory();
else if (pc->flags & LKCD)
retval = lkcd_free_memory();
else if (pc->flags & MCLXCD)
retval = vas_free_memory(NULL);
else if (pc->flags & S390D)
retval = s390_free_memory();
else if (pc->flags & SADUMP)
retval = sadump_free_memory();
break;
case DUMPFILE_MEM_DUMP:
if (REMOTE_DUMPFILE())
retval = remote_memory_dump(0);
else if (pc->flags & NETDUMP)
retval = netdump_memory_dump(fp);
else if (pc->flags & KDUMP)
retval = kdump_memory_dump(fp);
else if (pc->flags & XENDUMP)
retval = xendump_memory_dump(fp);
else if (pc->flags & KVMDUMP)
retval = kvmdump_memory_dump(fp);
else if (pc->flags & DISKDUMP)
retval = diskdump_memory_dump(fp);
else if (pc->flags & LKCD)
retval = lkcd_memory_dump(set_lkcd_fp(fp));
else if (pc->flags & MCLXCD)
retval = vas_memory_dump(fp);
else if (pc->flags & S390D)
retval = s390_memory_dump(fp);
else if (pc->flags & PROC_KCORE)
retval = kcore_memory_dump(fp);
else if (pc->flags & SADUMP)
retval = sadump_memory_dump(fp);
break;
case DUMPFILE_ENVIRONMENT:
if (pc->flags & LKCD) {
set_lkcd_fp(fp);
dump_lkcd_environment(0);
} else if (pc->flags & REM_LKCD)
retval = remote_memory_dump(VERBOSE);
break;
}
return retval;
}
/*
* Functions for sparse mem support
*/
ulong
sparse_decode_mem_map(ulong coded_mem_map, ulong section_nr)
{
return coded_mem_map +
(section_nr_to_pfn(section_nr) * SIZE(page));
}
void
sparse_mem_init(void)
{
ulong addr;
ulong mem_section_size;
int len, dimension;
if (!IS_SPARSEMEM())
return;
MEMBER_OFFSET_INIT(mem_section_section_mem_map, "mem_section",
"section_mem_map");
if (!MAX_PHYSMEM_BITS())
error(FATAL,
"CONFIG_SPARSEMEM kernels not supported for this architecture\n");
if ((len = get_array_length("mem_section", &dimension, 0) ==
(NR_MEM_SECTIONS() / _SECTIONS_PER_ROOT_EXTREME())) || !dimension)
vt->flags |= SPARSEMEM_EX;
if (IS_SPARSEMEM_EX()) {
machdep->sections_per_root = _SECTIONS_PER_ROOT_EXTREME();
mem_section_size = sizeof(void *) * NR_SECTION_ROOTS();
} else {
machdep->sections_per_root = _SECTIONS_PER_ROOT();
mem_section_size = SIZE(mem_section) * NR_SECTION_ROOTS();
}
if (CRASHDEBUG(1)) {
fprintf(fp, "PAGESIZE=%d\n",PAGESIZE());
fprintf(fp,"mem_section_size = %ld\n", mem_section_size);
fprintf(fp, "NR_SECTION_ROOTS = %ld\n", NR_SECTION_ROOTS());
fprintf(fp, "NR_MEM_SECTIONS = %ld\n", NR_MEM_SECTIONS());
fprintf(fp, "SECTIONS_PER_ROOT = %ld\n", SECTIONS_PER_ROOT() );
fprintf(fp, "SECTION_ROOT_MASK = 0x%lx\n", SECTION_ROOT_MASK());
fprintf(fp, "PAGES_PER_SECTION = %ld\n", PAGES_PER_SECTION());
if (IS_SPARSEMEM_EX() && !len)
error(WARNING, "SPARSEMEM_EX: questionable section values\n");
}
if (!(vt->mem_sec = (void *)malloc(mem_section_size)))
error(FATAL, "cannot malloc mem_sec cache\n");
if (!(vt->mem_section = (char *)malloc(SIZE(mem_section))))
error(FATAL, "cannot malloc mem_section cache\n");
addr = symbol_value("mem_section");
readmem(addr, KVADDR,vt->mem_sec ,mem_section_size,
"memory section root table", FAULT_ON_ERROR);
}
char *
read_mem_section(ulong addr)
{
if ((addr == 0) || !IS_KVADDR(addr))
return 0;
readmem(addr, KVADDR, vt->mem_section, SIZE(mem_section),
"memory section", FAULT_ON_ERROR);
return vt->mem_section;
}
ulong
nr_to_section(ulong nr)
{
ulong addr;
ulong *mem_sec = vt->mem_sec;
if (IS_SPARSEMEM_EX()) {
if (SECTION_NR_TO_ROOT(nr) >= NR_SECTION_ROOTS()) {
if (!STREQ(pc->curcmd, "rd") &&
!STREQ(pc->curcmd, "search") &&
!STREQ(pc->curcmd, "kmem"))
error(WARNING,
"sparsemem: invalid section number: %ld\n",
nr);
return 0;
}
}
if (IS_SPARSEMEM_EX()) {
if ((mem_sec[SECTION_NR_TO_ROOT(nr)] == 0) ||
!IS_KVADDR(mem_sec[SECTION_NR_TO_ROOT(nr)]))
return 0;
addr = mem_sec[SECTION_NR_TO_ROOT(nr)] +
(nr & SECTION_ROOT_MASK()) * SIZE(mem_section);
} else
addr = symbol_value("mem_section") +
(SECTIONS_PER_ROOT() * SECTION_NR_TO_ROOT(nr) +
(nr & SECTION_ROOT_MASK())) * SIZE(mem_section);
if (!IS_KVADDR(addr))
return 0;
return addr;
}
/*
* We use the lower bits of the mem_map pointer to store
* a little bit of information. There should be at least
* 3 bits here due to 32-bit alignment.
*/
#define SECTION_MARKED_PRESENT (1UL<<0)
#define SECTION_HAS_MEM_MAP (1UL<<1)
#define SECTION_MAP_LAST_BIT (1UL<<2)
#define SECTION_MAP_MASK (~(SECTION_MAP_LAST_BIT-1))
int
valid_section(ulong addr)
{
char *mem_section;
if ((mem_section = read_mem_section(addr)))
return (ULONG(mem_section +
OFFSET(mem_section_section_mem_map)) &&
SECTION_MARKED_PRESENT);
return 0;
}
int
section_has_mem_map(ulong addr)
{
char *mem_section;
if ((mem_section = read_mem_section(addr)))
return (ULONG(mem_section +
OFFSET(mem_section_section_mem_map))
&& SECTION_HAS_MEM_MAP);
return 0;
}
ulong
section_mem_map_addr(ulong addr)
{
char *mem_section;
ulong map;
if ((mem_section = read_mem_section(addr))) {
map = ULONG(mem_section +
OFFSET(mem_section_section_mem_map));
map &= SECTION_MAP_MASK;
return map;
}
return 0;
}
ulong
valid_section_nr(ulong nr)
{
ulong addr = nr_to_section(nr);
if (valid_section(addr))
return addr;
return 0;
}
ulong
pfn_to_map(ulong pfn)
{
ulong section, page_offset;
ulong section_nr;
ulong coded_mem_map, mem_map;
section_nr = pfn_to_section_nr(pfn);
if (!(section = valid_section_nr(section_nr)))
return 0;
if (section_has_mem_map(section)) {
page_offset = pfn - section_nr_to_pfn(section_nr);
coded_mem_map = section_mem_map_addr(section);
mem_map = sparse_decode_mem_map(coded_mem_map, section_nr) +
(page_offset * SIZE(page));
return mem_map;
}
return 0;
}
void
dump_mem_sections(void)
{
ulong nr,addr;
ulong nr_mem_sections;
ulong coded_mem_map, mem_map, pfn;
char buf1[BUFSIZE];
char buf2[BUFSIZE];
char buf3[BUFSIZE];
char buf4[BUFSIZE];
nr_mem_sections = NR_MEM_SECTIONS();
fprintf(fp, "\n");
pad_line(fp, BITS32() ? 59 : 67, '-');
fprintf(fp, "\n\nNR %s %s %s PFN\n",
mkstring(buf1, VADDR_PRLEN, CENTER|LJUST, "SECTION"),
mkstring(buf2, MAX(VADDR_PRLEN,strlen("CODED_MEM_MAP")),
CENTER|LJUST, "CODED_MEM_MAP"),
mkstring(buf3, VADDR_PRLEN, CENTER|LJUST, "MEM_MAP"));
for (nr = 0; nr < nr_mem_sections ; nr++) {
if ((addr = valid_section_nr(nr))) {
coded_mem_map = section_mem_map_addr(addr);
mem_map = sparse_decode_mem_map(coded_mem_map,nr);
pfn = section_nr_to_pfn(nr);
fprintf(fp, "%2ld %s %s %s %s\n",
nr,
mkstring(buf1, VADDR_PRLEN,
CENTER|LONG_HEX, MKSTR(addr)),
mkstring(buf2, MAX(VADDR_PRLEN,
strlen("CODED_MEM_MAP")),
CENTER|LONG_HEX|RJUST, MKSTR(coded_mem_map)),
mkstring(buf3, VADDR_PRLEN,
CENTER|LONG_HEX|RJUST, MKSTR(mem_map)),
pc->output_radix == 10 ?
mkstring(buf4, VADDR_PRLEN,
LONG_DEC|LJUST, MKSTR(pfn)) :
mkstring(buf4, VADDR_PRLEN,
LONG_HEX|LJUST, MKSTR(pfn)));
}
}
}
void
list_mem_sections(void)
{
ulong nr,addr;
ulong nr_mem_sections = NR_MEM_SECTIONS();
ulong coded_mem_map;
for (nr = 0; nr <= nr_mem_sections ; nr++) {
if ((addr = valid_section_nr(nr))) {
coded_mem_map = section_mem_map_addr(addr);
fprintf(fp,
"nr=%ld section = %lx coded_mem_map=%lx pfn=%ld mem_map=%lx\n",
nr,
addr,
coded_mem_map,
section_nr_to_pfn(nr),
sparse_decode_mem_map(coded_mem_map,nr));
}
}
}
/*
* For kernels containing the node_online_map or node_states[],
* return the number of online node bits set.
*/
static int
get_nodes_online(void)
{
int i, len, online;
struct gnu_request req;
ulong *maskptr;
long N_ONLINE;
ulong mapaddr;
if (!symbol_exists("node_online_map") &&
!symbol_exists("node_states"))
return 0;
len = mapaddr = 0;
if (symbol_exists("node_online_map")) {
if (LKCD_KERNTYPES()) {
if ((len = STRUCT_SIZE("nodemask_t")) < 0)
error(FATAL,
"cannot determine type nodemask_t\n");
mapaddr = symbol_value("node_online_map");
} else {
len = get_symbol_type("node_online_map", NULL, &req)
== TYPE_CODE_UNDEF ? sizeof(ulong) : req.length;
mapaddr = symbol_value("node_online_map");
}
} else if (symbol_exists("node_states")) {
if ((get_symbol_type("node_states", NULL, &req) != TYPE_CODE_ARRAY) ||
!(len = get_array_length("node_states", NULL, 0)) ||
!enumerator_value("N_ONLINE", &N_ONLINE))
return 0;
len = req.length / len;
mapaddr = symbol_value("node_states") + (N_ONLINE * len);
}
if (!(vt->node_online_map = (ulong *)malloc(len)))
error(FATAL, "cannot malloc node_online_map\n");
if (!readmem(mapaddr, KVADDR,
(void *)&vt->node_online_map[0], len, "node_online_map",
QUIET|RETURN_ON_ERROR))
error(FATAL, "cannot read node_online_map/node_states\n");
vt->node_online_map_len = len/sizeof(ulong);
online = 0;
maskptr = (ulong *)vt->node_online_map;
for (i = 0; i < vt->node_online_map_len; i++, maskptr++)
online += count_bits_long(*maskptr);
if (CRASHDEBUG(1)) {
fprintf(fp, "node_online_map: [");
for (i = 0; i < vt->node_online_map_len; i++)
fprintf(fp, "%s%lx", i ? ", " : "", vt->node_online_map[i]);
fprintf(fp, "] -> nodes online: %d\n", online);
}
if (online)
vt->numnodes = online;
return online;
}
/*
* Return the next node index, with "first" being the first acceptable node.
*/
static int
next_online_node(int first)
{
int i, j, node;
ulong mask, *maskptr;
if ((first/BITS_PER_LONG) >= vt->node_online_map_len) {
error(INFO, "next_online_node: %d is too large!\n", first);
return -1;
}
maskptr = (ulong *)vt->node_online_map;
for (i = node = 0; i < vt->node_online_map_len; i++, maskptr++) {
mask = *maskptr;
for (j = 0; j < BITS_PER_LONG; j++, node++) {
if (mask & 1) {
if (node >= first)
return node;
}
mask >>= 1;
}
}
return -1;
}
/*
* Modify appropriately for architecture/kernel nuances.
*/
static ulong
next_online_pgdat(int node)
{
char buf[BUFSIZE];
ulong pgdat;
/*
* Default -- look for type: struct pglist_data node_data[]
*/
if (LKCD_KERNTYPES()) {
if (!kernel_symbol_exists("node_data"))
goto pgdat2;
/*
* Just index into node_data[] without checking that it is
* an array; kerntypes have no such symbol information.
*/
} else {
if (get_symbol_type("node_data", NULL, NULL) != TYPE_CODE_ARRAY)
goto pgdat2;
open_tmpfile();
sprintf(buf, "whatis node_data");
if (!gdb_pass_through(buf, fp, GNU_RETURN_ON_ERROR)) {
close_tmpfile();
goto pgdat2;
}
rewind(pc->tmpfile);
while (fgets(buf, BUFSIZE, pc->tmpfile)) {
if (STRNEQ(buf, "type = "))
break;
}
close_tmpfile();
if ((!strstr(buf, "struct pglist_data *") &&
!strstr(buf, "pg_data_t *")) ||
(count_chars(buf, '[') != 1) ||
(count_chars(buf, ']') != 1))
goto pgdat2;
}
if (!readmem(symbol_value("node_data") + (node * sizeof(void *)),
KVADDR, &pgdat, sizeof(void *), "node_data", RETURN_ON_ERROR) ||
!IS_KVADDR(pgdat))
goto pgdat2;
return pgdat;
pgdat2:
if (LKCD_KERNTYPES()) {
if (!kernel_symbol_exists("pgdat_list"))
goto pgdat3;
} else {
if (get_symbol_type("pgdat_list",NULL,NULL) != TYPE_CODE_ARRAY)
goto pgdat3;
open_tmpfile();
sprintf(buf, "whatis pgdat_list");
if (!gdb_pass_through(buf, fp, GNU_RETURN_ON_ERROR)) {
close_tmpfile();
goto pgdat3;
}
rewind(pc->tmpfile);
while (fgets(buf, BUFSIZE, pc->tmpfile)) {
if (STRNEQ(buf, "type = "))
break;
}
close_tmpfile();
if ((!strstr(buf, "struct pglist_data *") &&
!strstr(buf, "pg_data_t *")) ||
(count_chars(buf, '[') != 1) ||
(count_chars(buf, ']') != 1))
goto pgdat3;
}
if (!readmem(symbol_value("pgdat_list") + (node * sizeof(void *)),
KVADDR, &pgdat, sizeof(void *), "pgdat_list", RETURN_ON_ERROR) ||
!IS_KVADDR(pgdat))
goto pgdat3;
return pgdat;
pgdat3:
if (symbol_exists("contig_page_data") && (node == 0))
return symbol_value("contig_page_data");
return 0;
}
/*
* Make the vm_stat[] array contents easily accessible.
*/
static int
vm_stat_init(void)
{
char buf[BUFSIZE];
char *arglist[MAXARGS];
int i, count, stringlen, total;
int c ATTRIBUTE_UNUSED;
struct gnu_request *req;
char *start;
long enum_value;
if (vt->flags & VM_STAT)
return TRUE;
if ((vt->nr_vm_stat_items == -1) || !symbol_exists("vm_stat"))
goto bailout;
/*
* look for type: type = atomic_long_t []
*/
if (LKCD_KERNTYPES()) {
if (!symbol_exists("vm_stat"))
goto bailout;
/*
* Just assume that vm_stat is an array; there is
* no symbol info in a kerntypes file.
*/
} else {
if (!symbol_exists("vm_stat") ||
get_symbol_type("vm_stat", NULL, NULL) != TYPE_CODE_ARRAY)
goto bailout;
vt->nr_vm_stat_items = get_array_length("vm_stat", NULL, 0);
}
open_tmpfile();
req = (struct gnu_request *)GETBUF(sizeof(struct gnu_request));
req->command = GNU_GET_DATATYPE;
req->name = "zone_stat_item";
req->flags = GNU_PRINT_ENUMERATORS;
gdb_interface(req);
FREEBUF(req);
stringlen = 1;
count = -1;
rewind(pc->tmpfile);
while (fgets(buf, BUFSIZE, pc->tmpfile)) {
if (strstr(buf, "{") || strstr(buf, "}"))
continue;
clean_line(buf);
c = parse_line(buf, arglist);
if (STREQ(arglist[0], "NR_VM_ZONE_STAT_ITEMS")) {
if (LKCD_KERNTYPES())
vt->nr_vm_stat_items =
MAX(atoi(arglist[2]), count);
break;
} else {
stringlen += strlen(arglist[0]);
count++;
}
}
total = stringlen + vt->nr_vm_stat_items +
(sizeof(void *) * vt->nr_vm_stat_items);
if (!(vt->vm_stat_items = (char **)malloc(total))) {
close_tmpfile();
error(FATAL, "cannot malloc vm_stat_items cache\n");
}
BZERO(vt->vm_stat_items, total);
start = (char *)&vt->vm_stat_items[vt->nr_vm_stat_items];
rewind(pc->tmpfile);
while (fgets(buf, BUFSIZE, pc->tmpfile)) {
if (strstr(buf, "{") || strstr(buf, "}"))
continue;
c = parse_line(buf, arglist);
if (enumerator_value(arglist[0], &enum_value))
i = enum_value;
else {
close_tmpfile();
goto bailout;
}
if (i < vt->nr_vm_stat_items) {
vt->vm_stat_items[i] = start;
strcpy(start, arglist[0]);
start += strlen(arglist[0]) + 1;
}
}
close_tmpfile();
vt->flags |= VM_STAT;
return TRUE;
bailout:
vt->nr_vm_stat_items = -1;
return FALSE;
}
/*
* Either dump all vm_stat entries, or return the value of
* the specified vm_stat item. Use the global counter unless
* a zone-specific address is passed.
*/
static int
dump_vm_stat(char *item, long *retval, ulong zone)
{
char *buf;
ulong *vp;
ulong location;
int i, maxlen, len;
if (!vm_stat_init()) {
if (!item)
if (CRASHDEBUG(1))
error(INFO,
"vm_stat not available in this kernel\n");
return FALSE;
}
buf = GETBUF(sizeof(ulong) * vt->nr_vm_stat_items);
location = zone ? zone : symbol_value("vm_stat");
readmem(location, KVADDR, buf,
sizeof(ulong) * vt->nr_vm_stat_items,
"vm_stat", FAULT_ON_ERROR);
if (!item) {
if (!zone)
fprintf(fp, " VM_STAT:\n");
for (i = maxlen = 0; i < vt->nr_vm_stat_items; i++)
if ((len = strlen(vt->vm_stat_items[i])) > maxlen)
maxlen = len;
vp = (ulong *)buf;
for (i = 0; i < vt->nr_vm_stat_items; i++)
fprintf(fp, "%s%s: %ld\n",
space(maxlen - strlen(vt->vm_stat_items[i])),
vt->vm_stat_items[i], vp[i]);
return TRUE;
}
vp = (ulong *)buf;
for (i = 0; i < vt->nr_vm_stat_items; i++) {
if (STREQ(vt->vm_stat_items[i], item)) {
*retval = vp[i];
return TRUE;
}
}
return FALSE;
}
/*
* Dump the cumulative totals of the per_cpu__page_states counters.
*/
int
dump_page_states(void)
{
struct syment *sp;
ulong addr, value;
int i, c, fd, len, instance, members;
char buf[BUFSIZE];
char *arglist[MAXARGS];
struct entry {
char *name;
ulong value;
} *entry_list;
struct stat stat;
char *namebuf, *nameptr;
if (!(sp = per_cpu_symbol_search("per_cpu__page_states"))) {
if (CRASHDEBUG(1))
error(INFO, "per_cpu__page_states"
"not available in this kernel\n");
return FALSE;
}
instance = members = len = 0;
sprintf(buf, "ptype struct page_state");
open_tmpfile();
if (!gdb_pass_through(buf, fp, GNU_RETURN_ON_ERROR)) {
close_tmpfile();
return FALSE;
}
fflush(pc->tmpfile);
fd = fileno(pc->tmpfile);
fstat(fd, &stat);
namebuf = GETBUF(stat.st_size);
nameptr = namebuf;
rewind(pc->tmpfile);
while (fgets(buf, BUFSIZE, pc->tmpfile)) {
if (strstr(buf, "struct page_state") ||
strstr(buf, "}"))
continue;
members++;
}
entry_list = (struct entry *)
GETBUF(sizeof(struct entry) * members);
rewind(pc->tmpfile);
i = 0;
while (fgets(buf, BUFSIZE, pc->tmpfile)) {
if (strstr(buf, "struct page_state") ||
strstr(buf, "}"))
continue;
strip_ending_char(strip_linefeeds(buf), ';');
c = parse_line(buf, arglist);
strcpy(nameptr, arglist[c-1]);
entry_list[i].name = nameptr;
if (strlen(nameptr) > len)
len = strlen(nameptr);
nameptr += strlen(nameptr)+2;
i++;
}
close_tmpfile();
open_tmpfile();
for (c = 0; c < kt->cpus; c++) {
addr = sp->value + kt->__per_cpu_offset[c];
dump_struct("page_state", addr, RADIX(16));
}
i = 0;
rewind(pc->tmpfile);
while (fgets(buf, BUFSIZE, pc->tmpfile)) {
if (strstr(buf, "struct page_state")) {
instance++;
i = 0;
continue;
}
if (strstr(buf, "}"))
continue;
strip_linefeeds(buf);
extract_hex(buf, &value, ',', TRUE);
entry_list[i].value += value;
i++;
}
close_tmpfile();
fprintf(fp, " PAGE_STATES:\n");
for (i = 0; i < members; i++) {
sprintf(buf, "%s", entry_list[i].name);
fprintf(fp, "%s", mkstring(buf, len+2, RJUST, 0));
fprintf(fp, ": %ld\n", entry_list[i].value);
}
FREEBUF(namebuf);
FREEBUF(entry_list);
return TRUE;
}
/*
* Dump the cumulative totals of the per_cpu__vm_event_state
* counters.
*/
static int
dump_vm_event_state(void)
{
int i, c, maxlen, len;
struct syment *sp;
ulong addr;
ulong *events, *cumulative;
if (!vm_event_state_init())
return FALSE;
events = (ulong *)GETBUF((sizeof(ulong) * vt->nr_vm_event_items) * 2);
cumulative = &events[vt->nr_vm_event_items];
sp = per_cpu_symbol_search("per_cpu__vm_event_states");
for (c = 0; c < kt->cpus; c++) {
addr = sp->value + kt->__per_cpu_offset[c];
if (CRASHDEBUG(1)) {
fprintf(fp, "[%d]: %lx\n", c, addr);
dump_struct("vm_event_state", addr, RADIX(16));
}
readmem(addr, KVADDR, events,
sizeof(ulong) * vt->nr_vm_event_items,
"vm_event_states buffer", FAULT_ON_ERROR);
for (i = 0; i < vt->nr_vm_event_items; i++)
cumulative[i] += events[i];
}
fprintf(fp, "\n VM_EVENT_STATES:\n");
for (i = maxlen = 0; i < vt->nr_vm_event_items; i++)
if ((len = strlen(vt->vm_event_items[i])) > maxlen)
maxlen = len;
for (i = 0; i < vt->nr_vm_event_items; i++)
fprintf(fp, "%s%s: %ld\n",
space(maxlen - strlen(vt->vm_event_items[i])),
vt->vm_event_items[i], cumulative[i]);
FREEBUF(events);
return TRUE;
}
static int
vm_event_state_init(void)
{
int i, stringlen, total;
int c ATTRIBUTE_UNUSED;
long count, enum_value;
struct gnu_request *req;
char *arglist[MAXARGS];
char buf[BUFSIZE];
char *start;
if (vt->flags & VM_EVENT)
return TRUE;
if ((vt->nr_vm_event_items == -1) ||
!per_cpu_symbol_search("per_cpu__vm_event_states"))
goto bailout;
if (!enumerator_value("NR_VM_EVENT_ITEMS", &count))
return FALSE;
vt->nr_vm_event_items = count;
open_tmpfile();
req = (struct gnu_request *)GETBUF(sizeof(struct gnu_request));
req->command = GNU_GET_DATATYPE;
req->name = "vm_event_item";
req->flags = GNU_PRINT_ENUMERATORS;
gdb_interface(req);
FREEBUF(req);
stringlen = 1;
rewind(pc->tmpfile);
while (fgets(buf, BUFSIZE, pc->tmpfile)) {
if (strstr(buf, "{") || strstr(buf, "}"))
continue;
clean_line(buf);
c = parse_line(buf, arglist);
if (STREQ(arglist[0], "NR_VM_EVENT_ITEMS"))
break;
else
stringlen += strlen(arglist[0]);
}
total = stringlen + vt->nr_vm_event_items +
(sizeof(void *) * vt->nr_vm_event_items);
if (!(vt->vm_event_items = (char **)malloc(total))) {
close_tmpfile();
error(FATAL, "cannot malloc vm_event_items cache\n");
}
BZERO(vt->vm_event_items, total);
start = (char *)&vt->vm_event_items[vt->nr_vm_event_items];
rewind(pc->tmpfile);
while (fgets(buf, BUFSIZE, pc->tmpfile)) {
if (strstr(buf, "{") || strstr(buf, "}"))
continue;
c = parse_line(buf, arglist);
if (enumerator_value(arglist[0], &enum_value))
i = enum_value;
else {
close_tmpfile();
goto bailout;
}
if (i < vt->nr_vm_event_items) {
vt->vm_event_items[i] = start;
strcpy(start, arglist[0]);
start += strlen(arglist[0]) + 1;
}
}
close_tmpfile();
vt->flags |= VM_EVENT;
return TRUE;
bailout:
vt->nr_vm_event_items = -1;
return FALSE;
}
/*
* Dump the per-cpu offset values that are used to
* resolve per-cpu symbol values.
*/
static void
dump_per_cpu_offsets(void)
{
int c;
char buf[BUFSIZE];
fprintf(fp, "PER-CPU OFFSET VALUES:\n");
for (c = 0; c < kt->cpus; c++) {
sprintf(buf, "CPU %d", c);
fprintf(fp, "%7s: %lx\n", buf, kt->__per_cpu_offset[c]);
}
}
/*
* Dump the value(s) of a page->flags bitmap.
*/
void
dump_page_flags(ulonglong flags)
{
int c ATTRIBUTE_UNUSED;
int sz, val, found, largest, longest, header_printed;
char buf1[BUFSIZE];
char buf2[BUFSIZE];
char header[BUFSIZE];
char *arglist[MAXARGS];
ulonglong tmpflag;
found = longest = largest = header_printed = 0;
open_tmpfile();
if (dump_enumerator_list("pageflags")) {
rewind(pc->tmpfile);
while (fgets(buf1, BUFSIZE, pc->tmpfile)) {
if (strstr(buf1, " = ")) {
c = parse_line(buf1, arglist);
if ((sz = strlen(arglist[0])) > longest)
longest = sz;
if (strstr(arglist[0], "PG_") &&
((val = atoi(arglist[2])) > largest))
largest = val;
}
}
} else
error(FATAL, "enum pageflags does not exist in this kernel\n");
largest = (largest+1)/4 + 1;
sprintf(header, "%s BIT VALUE\n",
mkstring(buf1, longest, LJUST, "PAGE-FLAG"));
rewind(pc->tmpfile);
if (flags)
fprintf(pc->saved_fp, "FLAGS: %llx\n", flags);
fprintf(pc->saved_fp, "%s%s", flags ? " " : "", header);
while (fgets(buf1, BUFSIZE, pc->tmpfile)) {
if (strstr(buf1, " = ") && strstr(buf1, "PG_")) {
c = parse_line(buf1, arglist);
val = atoi(arglist[2]);
tmpflag = 1ULL << val;
if (!flags || (flags & tmpflag)) {
fprintf(pc->saved_fp, "%s%s %2d %.*lx\n",
flags ? " " : "",
mkstring(buf2, longest, LJUST,
arglist[0]), val,
largest, (ulong)(1ULL << val));
if (flags & tmpflag)
found++;
}
}
}
if (flags && !found)
fprintf(pc->saved_fp, " (none found)\n");
close_tmpfile();
}
/*
* Support for slub.c slab cache.
*/
static void
kmem_cache_init_slub(void)
{
if (CRASHDEBUG(1) &&
!(vt->flags & CONFIG_NUMA) && (vt->numnodes > 1))
error(WARNING,
"kmem_cache_init_slub: numnodes: %d without CONFIG_NUMA\n",
vt->numnodes);
kmem_cache_downsize();
vt->cpu_slab_type = MEMBER_TYPE("kmem_cache", "cpu_slab");
vt->flags |= KMEM_CACHE_INIT;
}
static void
kmem_cache_list_common(void)
{
int i, cnt;
ulong *cache_list;
ulong name;
char buf[BUFSIZE];
cnt = get_kmem_cache_list(&cache_list);
for (i = 0; i < cnt; i++) {
fprintf(fp, "%lx ", cache_list[i]);
readmem(cache_list[i] + OFFSET(kmem_cache_name),
KVADDR, &name, sizeof(char *),
"kmem_cache.name", FAULT_ON_ERROR);
if (!read_string(name, buf, BUFSIZE-1))
sprintf(buf, "(unknown)\n");
fprintf(fp, "%s\n", buf);
}
FREEBUF(cache_list);
}
#define DUMP_KMEM_CACHE_INFO_SLUB() dump_kmem_cache_info_slub(si)
static void
dump_kmem_cache_info_slub(struct meminfo *si)
{
char b1[BUFSIZE];
char b2[BUFSIZE];
int namelen, sizelen, spacelen;
fprintf(fp, "%s ",
mkstring(b1, VADDR_PRLEN, LJUST|LONG_HEX, MKSTR(si->cache)));
namelen = strlen(si->curname);
sprintf(b2, "%ld", si->objsize);
sizelen = strlen(b2);
spacelen = 0;
if (namelen++ > 18) {
spacelen = 29 - namelen - sizelen;
fprintf(fp, "%s%s%ld ", si->curname,
space(spacelen <= 0 ? 1 : spacelen), si->objsize);
if (spacelen > 0)
spacelen = 1;
sprintf(b1, "%c%dld ", '%', 9 + spacelen - 1);
} else {
fprintf(fp, "%-18s %8ld ", si->curname, si->objsize);
sprintf(b1, "%c%dld ", '%', 9);
}
fprintf(fp, b1, si->inuse);
fprintf(fp, "%8ld %5ld %4ldk\n",
si->num_slabs * si->objects,
si->num_slabs, si->slabsize/1024);
}
static void
dump_kmem_cache_slub(struct meminfo *si)
{
int i;
ulong name, oo;
unsigned int size, objsize, objects, order, offset;
char *reqname, *p1;
char kbuf[BUFSIZE];
char buf[BUFSIZE];
if (INVALID_MEMBER(kmem_cache_node_nr_slabs)) {
error(INFO,
"option requires kmem_cache_node.nr_slabs member!\n"
"(the kernel must be built with CONFIG_SLUB_DEBUG)\n");
return;
}
order = objects = 0;
si->cache_count = get_kmem_cache_list(&si->cache_list);
si->cache_buf = GETBUF(SIZE(kmem_cache));
if (VALID_MEMBER(page_objects) &&
OFFSET(page_objects) == OFFSET(page_inuse))
si->flags |= SLAB_BITFIELD;
if (!si->reqname &&
!(si->flags & (ADDRESS_SPECIFIED|GET_SLAB_PAGES)))
fprintf(fp, "%s", kmem_cache_hdr);
if (si->flags & ADDRESS_SPECIFIED) {
if ((p1 = is_slab_page(si, kbuf))) {
si->flags |= VERBOSE;
si->slab = (ulong)si->spec_addr;
} else if (!(p1 = vaddr_to_kmem_cache(si->spec_addr, kbuf,
VERBOSE))) {
error(INFO,
"address is not allocated in slab subsystem: %lx\n",
si->spec_addr);
goto bailout;
}
if (si->reqname && (si->reqname != p1))
error(INFO,
"ignoring pre-selected %s cache for address: %lx\n",
si->reqname, si->spec_addr, si->reqname);
reqname = p1;
} else
reqname = si->reqname;
for (i = 0; i < si->cache_count; i++) {
BZERO(si->cache_buf, SIZE(kmem_cache));
if (!readmem(si->cache_list[i], KVADDR, si->cache_buf,
SIZE(kmem_cache), "kmem_cache buffer",
RETURN_ON_ERROR|RETURN_PARTIAL))
goto next_cache;
name = ULONG(si->cache_buf + OFFSET(kmem_cache_name));
if (!read_string(name, buf, BUFSIZE-1))
sprintf(buf, "(unknown)");
if (reqname) {
if (!STREQ(reqname, buf))
continue;
fprintf(fp, "%s", kmem_cache_hdr);
}
if (ignore_cache(si, buf)) {
fprintf(fp, "%lx %-18s [IGNORED]\n",
si->cache_list[i], buf);
goto next_cache;
}
objsize = UINT(si->cache_buf + OFFSET(kmem_cache_objsize));
size = UINT(si->cache_buf + OFFSET(kmem_cache_size));
offset = UINT(si->cache_buf + OFFSET(kmem_cache_offset));
if (VALID_MEMBER(kmem_cache_objects)) {
objects = UINT(si->cache_buf +
OFFSET(kmem_cache_objects));
order = UINT(si->cache_buf + OFFSET(kmem_cache_order));
} else if (VALID_MEMBER(kmem_cache_oo)) {
oo = ULONG(si->cache_buf + OFFSET(kmem_cache_oo));
objects = oo_objects(oo);
order = oo_order(oo);
} else
error(FATAL, "cannot determine "
"kmem_cache objects/order values\n");
si->cache = si->cache_list[i];
si->curname = buf;
si->objsize = objsize;
si->size = size;
si->objects = objects;
si->slabsize = (PAGESIZE() << order);
si->inuse = si->num_slabs = 0;
si->slab_offset = offset;
if (!get_kmem_cache_slub_data(GET_SLUB_SLABS, si) ||
!get_kmem_cache_slub_data(GET_SLUB_OBJECTS, si))
goto next_cache;
DUMP_KMEM_CACHE_INFO_SLUB();
if (si->flags & ADDRESS_SPECIFIED) {
if (!si->slab)
si->slab = vaddr_to_slab(si->spec_addr);
do_slab_slub(si, VERBOSE);
} else if (si->flags & VERBOSE) {
do_kmem_cache_slub(si);
if (!reqname && ((i+1) < si->cache_count))
fprintf(fp, "%s", kmem_cache_hdr);
}
next_cache:
if (reqname)
break;
}
bailout:
FREEBUF(si->cache_list);
FREEBUF(si->cache_buf);
}
/*
* Emulate the total count calculation done by the
* slab_objects() sysfs function in slub.c.
*/
static int
get_kmem_cache_slub_data(long cmd, struct meminfo *si)
{
int i, n, node;
ulong total_objects, total_slabs;
ulong cpu_slab_ptr, node_ptr;
ulong node_nr_partial, node_nr_slabs;
int full_slabs, objects;
long p;
short inuse;
ulong *nodes, *per_cpu;
struct node_table *nt;
/*
* nodes[n] is not being used (for now)
* per_cpu[n] is a count of cpu_slab pages per node.
*/
nodes = (ulong *)GETBUF(2 * sizeof(ulong) * vt->numnodes);
per_cpu = nodes + vt->numnodes;
total_slabs = total_objects = 0;
for (i = 0; i < kt->cpus; i++) {
cpu_slab_ptr = get_cpu_slab_ptr(si, i, NULL);
if (!cpu_slab_ptr)
continue;
if ((node = page_to_nid(cpu_slab_ptr)) < 0)
goto bailout;
switch (cmd)
{
case GET_SLUB_OBJECTS:
if (!readmem(cpu_slab_ptr + OFFSET(page_inuse),
KVADDR, &inuse, sizeof(short),
"page inuse", RETURN_ON_ERROR))
return FALSE;
total_objects += inuse;
break;
case GET_SLUB_SLABS:
total_slabs++;
break;
}
per_cpu[node]++;
}
for (n = 0; n < vt->numnodes; n++) {
if (vt->flags & CONFIG_NUMA) {
nt = &vt->node_table[n];
node_ptr = ULONG(si->cache_buf +
OFFSET(kmem_cache_node) +
(sizeof(void *) * nt->node_id));
} else
node_ptr = si->cache +
OFFSET(kmem_cache_local_node);
if (!node_ptr)
continue;
if (!readmem(node_ptr + OFFSET(kmem_cache_node_nr_partial),
KVADDR, &node_nr_partial, sizeof(ulong),
"kmem_cache_node nr_partial", RETURN_ON_ERROR))
goto bailout;
if (!readmem(node_ptr + OFFSET(kmem_cache_node_nr_slabs),
KVADDR, &node_nr_slabs, sizeof(ulong),
"kmem_cache_node nr_slabs", RETURN_ON_ERROR))
goto bailout;
switch (cmd)
{
case GET_SLUB_OBJECTS:
if ((p = count_partial(node_ptr, si)) < 0)
return FALSE;
total_objects += p;
break;
case GET_SLUB_SLABS:
total_slabs += node_nr_partial;
break;
}
full_slabs = node_nr_slabs - per_cpu[n] - node_nr_partial;
objects = si->objects;
switch (cmd)
{
case GET_SLUB_OBJECTS:
total_objects += (full_slabs * objects);
break;
case GET_SLUB_SLABS:
total_slabs += full_slabs;
break;
}
if (!(vt->flags & CONFIG_NUMA))
break;
}
switch (cmd)
{
case GET_SLUB_OBJECTS:
si->inuse = total_objects;
break;
case GET_SLUB_SLABS:
si->num_slabs = total_slabs;
break;
}
FREEBUF(nodes);
return TRUE;
bailout:
FREEBUF(nodes);
return FALSE;
}
static void
do_kmem_cache_slub(struct meminfo *si)
{
int i, n;
ulong cpu_slab_ptr, node_ptr;
ulong node_nr_partial, node_nr_slabs;
ulong *per_cpu;
struct node_table *nt;
per_cpu = (ulong *)GETBUF(sizeof(ulong) * vt->numnodes);
for (i = 0; i < kt->cpus; i++) {
cpu_slab_ptr = get_cpu_slab_ptr(si, i, NULL);
fprintf(fp, "CPU %d SLAB:\n%s", i,
cpu_slab_ptr ? "" : " (empty)\n");
if (!cpu_slab_ptr)
continue;
if ((n = page_to_nid(cpu_slab_ptr)) >= 0)
per_cpu[n]++;
si->slab = cpu_slab_ptr;
do_slab_slub(si, VERBOSE);
if (received_SIGINT())
restart(0);
}
for (n = 0; n < vt->numnodes; n++) {
if (vt->flags & CONFIG_NUMA) {
nt = &vt->node_table[n];
node_ptr = ULONG(si->cache_buf +
OFFSET(kmem_cache_node) +
(sizeof(void *)* nt->node_id));
} else
node_ptr = si->cache +
OFFSET(kmem_cache_local_node);
if (node_ptr) {
if (!readmem(node_ptr + OFFSET(kmem_cache_node_nr_partial),
KVADDR, &node_nr_partial, sizeof(ulong),
"kmem_cache_node nr_partial", RETURN_ON_ERROR))
break;
if (!readmem(node_ptr + OFFSET(kmem_cache_node_nr_slabs),
KVADDR, &node_nr_slabs, sizeof(ulong),
"kmem_cache_node nr_slabs", RETURN_ON_ERROR))
break;
} else
node_nr_partial = node_nr_slabs = 0;
fprintf(fp, "KMEM_CACHE_NODE NODE SLABS PARTIAL PER-CPU\n");
fprintf(fp, "%lx%s", node_ptr, space(VADDR_PRLEN > 8 ? 2 : 10));
fprintf(fp, "%4d %5ld %7ld %7ld\n",
n, node_nr_slabs, node_nr_partial, per_cpu[n]);
do_node_lists_slub(si, node_ptr, n);
if (!(vt->flags & CONFIG_NUMA))
break;
}
fprintf(fp, "\n");
FREEBUF(per_cpu);
}
#define DUMP_SLAB_INFO_SLUB() \
{ \
char b1[BUFSIZE], b2[BUFSIZE]; \
fprintf(fp, " %s %s %4d %5d %9d %4d\n", \
mkstring(b1, VADDR_PRLEN, LJUST|LONG_HEX, MKSTR(si->slab)), \
mkstring(b2, VADDR_PRLEN, LJUST|LONG_HEX, MKSTR(vaddr)), \
node, objects, inuse, objects - inuse); \
}
static void
do_slab_slub(struct meminfo *si, int verbose)
{
physaddr_t paddr;
ulong vaddr, objects_vaddr;
ushort inuse, objects;
ulong freelist, cpu_freelist, cpu_slab_ptr;
int i, cpu_slab, is_free, node;
ulong p, q;
if (!si->slab) {
if (CRASHDEBUG(1))
error(INFO, "-S option not supported for CONFIG_SLUB\n");
return;
}
if (!page_to_phys(si->slab, &paddr)) {
error(WARNING,
"%lx: cannot tranlate slab page to physical address\n",
si->slab);
return;
}
node = page_to_nid(si->slab);
vaddr = PTOV(paddr);
if (verbose)
fprintf(fp, " %s", slab_hdr);
if (!readmem(si->slab + OFFSET(page_inuse), KVADDR, &inuse,
sizeof(ushort), "page.inuse", RETURN_ON_ERROR))
return;
if (!readmem(si->slab + OFFSET(page_freelist), KVADDR, &freelist,
sizeof(void *), "page.freelist", RETURN_ON_ERROR))
return;
/*
* Pre-2.6.27, the object count and order were fixed in the
* kmem_cache structure. Now they may change, say if a high
* order slab allocation fails, so the per-slab object count
* is kept in the slab.
*/
if (VALID_MEMBER(page_objects)) {
objects_vaddr = si->slab + OFFSET(page_objects);
if (si->flags & SLAB_BITFIELD)
objects_vaddr += sizeof(ushort);
if (!readmem(objects_vaddr, KVADDR, &objects,
sizeof(ushort), "page.objects", RETURN_ON_ERROR))
return;
/*
* Strip page.frozen bit.
*/
if (si->flags & SLAB_BITFIELD) {
if (__BYTE_ORDER == __LITTLE_ENDIAN) {
objects <<= 1;
objects >>= 1;
}
if (__BYTE_ORDER == __BIG_ENDIAN)
objects >>= 1;
}
if (CRASHDEBUG(1) && (objects != si->objects))
error(NOTE, "%s: slab: %lx oo objects: %ld "
"slab objects: %d\n",
si->curname, si->slab,
si->objects, objects);
} else
objects = (ushort)si->objects;
if (!verbose) {
DUMP_SLAB_INFO_SLUB();
return;
}
for (i = 0, cpu_slab = -1; i < kt->cpus; i++) {
cpu_slab_ptr = get_cpu_slab_ptr(si, i, &cpu_freelist);
if (!cpu_slab_ptr)
continue;
if (cpu_slab_ptr == si->slab) {
cpu_slab = i;
/*
* Later slub scheme uses the per-cpu freelist
* so count the free objects by hand.
*/
if (cpu_freelist)
freelist = cpu_freelist;
inuse = si->objects - count_free_objects(si, freelist);
break;
}
}
DUMP_SLAB_INFO_SLUB();
fprintf(fp, " %s", free_inuse_hdr);
#define PAGE_MAPPING_ANON 1
if (CRASHDEBUG(1)) {
fprintf(fp, "< SLUB: free list START: >\n");
i = 0;
for (q = freelist; q; q = get_freepointer(si, (void *)q)) {
if (q & PAGE_MAPPING_ANON) {
fprintf(fp,
"< SLUB: free list END: %lx (%d found) >\n",
q, i);
break;
}
fprintf(fp, " %lx\n", q);
i++;
}
if (!q)
fprintf(fp, "< SLUB: free list END (%d found) >\n", i);
}
for (p = vaddr; p < vaddr + objects * si->size; p += si->size) {
is_free = FALSE;
for (is_free = 0, q = freelist; q;
q = get_freepointer(si, (void *)q)) {
if (q == BADADDR)
return;
if (q & PAGE_MAPPING_ANON)
break;
if (p == q) {
is_free = TRUE;
break;
}
}
if (si->flags & ADDRESS_SPECIFIED) {
if ((si->spec_addr < p) ||
(si->spec_addr >= (p + si->size))) {
if (!(si->flags & VERBOSE))
continue;
}
}
fprintf(fp, " %s%lx%s",
is_free ? " " : "[",
p, is_free ? " " : "]");
if (is_free && (cpu_slab >= 0))
fprintf(fp, "(cpu %d cache)", cpu_slab);
fprintf(fp, "\n");
}
}
static int
count_free_objects(struct meminfo *si, ulong freelist)
{
int c;
ulong q;
c = 0;
for (q = freelist; q; q = get_freepointer(si, (void *)q)) {
if (q & PAGE_MAPPING_ANON)
break;
c++;
}
return c;
}
static ulong
get_freepointer(struct meminfo *si, void *object)
{
ulong vaddr, nextfree;
vaddr = (ulong)(object + si->slab_offset);
if (!readmem(vaddr, KVADDR, &nextfree,
sizeof(void *), "get_freepointer", RETURN_ON_ERROR))
return BADADDR;
return nextfree;
}
static void
do_node_lists_slub(struct meminfo *si, ulong node_ptr, int node)
{
ulong next, list_head, flags;
int first;
if (!node_ptr)
return;
list_head = node_ptr + OFFSET(kmem_cache_node_partial);
if (!readmem(list_head, KVADDR, &next, sizeof(ulong),
"kmem_cache_node partial", RETURN_ON_ERROR))
return;
fprintf(fp, "NODE %d PARTIAL:\n%s", node,
next == list_head ? " (empty)\n" : "");
first = 0;
while (next != list_head) {
si->slab = next - OFFSET(page_lru);
if (first++ == 0)
fprintf(fp, " %s", slab_hdr);
do_slab_slub(si, !VERBOSE);
if (received_SIGINT())
restart(0);
if (!readmem(next, KVADDR, &next, sizeof(ulong),
"page.lru.next", RETURN_ON_ERROR))
return;
if (!IS_KVADDR(next)) {
error(INFO, "%s: partial list: page.lru.next: %lx\n",
si->curname, next);
return;
}
}
#define SLAB_STORE_USER (0x00010000UL)
flags = ULONG(si->cache_buf + OFFSET(kmem_cache_flags));
if (INVALID_MEMBER(kmem_cache_node_full) ||
!(flags & SLAB_STORE_USER)) {
fprintf(fp, "NODE %d FULL:\n (not tracked)\n", node);
return;
}
list_head = node_ptr + OFFSET(kmem_cache_node_full);
if (!readmem(list_head, KVADDR, &next, sizeof(ulong),
"kmem_cache_node full", RETURN_ON_ERROR))
return;
fprintf(fp, "NODE %d FULL:\n%s", node,
next == list_head ? " (empty)\n" : "");
first = 0;
while (next != list_head) {
si->slab = next - OFFSET(page_lru);
if (first++ == 0)
fprintf(fp, " %s", slab_hdr);
do_slab_slub(si, !VERBOSE);
if (received_SIGINT())
restart(0);
if (!readmem(next, KVADDR, &next, sizeof(ulong),
"page.lru.next", RETURN_ON_ERROR))
return;
if (!IS_KVADDR(next)) {
error(INFO, "%s: full list: page.lru.next: %lx\n",
si->curname, next);
return;
}
}
}
static char *
is_kmem_cache_addr_common(ulong vaddr, char *kbuf)
{
int i, cnt;
ulong *cache_list;
ulong name;
int found;
cnt = get_kmem_cache_list(&cache_list);
for (i = 0, found = FALSE; i < cnt; i++) {
if (cache_list[i] != vaddr)
continue;
if (!readmem(cache_list[i] + OFFSET(kmem_cache_name),
KVADDR, &name, sizeof(char *),
"kmem_cache.name", RETURN_ON_ERROR))
break;
if (!read_string(name, kbuf, BUFSIZE-1))
sprintf(kbuf, "(unknown)");
found = TRUE;
break;
}
FREEBUF(cache_list);
return (found ? kbuf : NULL);
}
/*
* Kernel-config-neutral page-to-node evaluator.
*/
static int
page_to_nid(ulong page)
{
int i;
physaddr_t paddr;
struct node_table *nt;
physaddr_t end_paddr;
if (!page_to_phys(page, &paddr)) {
error(INFO, "page_to_nid: invalid page: %lx\n", page);
return -1;
}
for (i = 0; i < vt->numnodes; i++) {
nt = &vt->node_table[i];
end_paddr = nt->start_paddr +
((physaddr_t)nt->size * (physaddr_t)PAGESIZE());
if ((paddr >= nt->start_paddr) && (paddr < end_paddr))
return i;
}
error(INFO, "page_to_nid: cannot determine node for pages: %lx\n",
page);
return -1;
}
/*
* Allocate and fill the passed-in buffer with a list of
* the current kmem_cache structures.
*/
static int
get_kmem_cache_list(ulong **cache_buf)
{
int cnt;
ulong vaddr;
struct list_data list_data, *ld;
get_symbol_data("slab_caches", sizeof(void *), &vaddr);
ld = &list_data;
BZERO(ld, sizeof(struct list_data));
ld->flags |= LIST_ALLOCATE;
ld->start = vaddr;
ld->list_head_offset = OFFSET(kmem_cache_list);
ld->end = symbol_value("slab_caches");
if (CRASHDEBUG(3))
ld->flags |= VERBOSE;
cnt = do_list(ld);
*cache_buf = ld->list_ptr;
return cnt;
}
/*
* Get the address of the head page of a compound page.
*/
static ulong
compound_head(ulong page)
{
ulong flags, first_page;;
first_page = page;
if (!readmem(page+OFFSET(page_flags), KVADDR, &flags, sizeof(ulong),
"page.flags", RETURN_ON_ERROR))
return first_page;
if ((flags & vt->PG_head_tail_mask) == vt->PG_head_tail_mask)
readmem(page+OFFSET(page_first_page), KVADDR, &first_page,
sizeof(ulong), "page.first_page", RETURN_ON_ERROR);
return first_page;
}
long
count_partial(ulong node, struct meminfo *si)
{
ulong list_head, next;
short inuse;
ulong total_inuse;
ulong count = 0;
count = 0;
total_inuse = 0;
list_head = node + OFFSET(kmem_cache_node_partial);
if (!readmem(list_head, KVADDR, &next, sizeof(ulong),
"kmem_cache_node.partial", RETURN_ON_ERROR))
return -1;
hq_open();
while (next != list_head) {
if (!readmem(next - OFFSET(page_lru) + OFFSET(page_inuse),
KVADDR, &inuse, sizeof(ushort), "page.inuse", RETURN_ON_ERROR)) {
hq_close();
return -1;
}
if (inuse == -1) {
error(INFO, "%s: partial list: page.inuse: -1\n",
si->curname);
break;
}
total_inuse += inuse;
if (!readmem(next, KVADDR, &next, sizeof(ulong),
"page.lru.next", RETURN_ON_ERROR)) {
hq_close();
return -1;
}
if (!IS_KVADDR(next)) {
error(INFO, "%s: partial list: page.lru.next: %lx\n",
si->curname, next);
break;
}
/*
* Keep track of the last 1000 entries, and check
* whether the list has recursed back onto itself.
*/
if ((++count % 1000) == 0) {
hq_close();
hq_open();
}
if (!hq_enter(next)) {
error(INFO,
"%s: partial list: list corrupt: recurses back onto itself\n",
si->curname);
hq_close();
return -1;
}
}
hq_close();
return total_inuse;
}
char *
is_slab_page(struct meminfo *si, char *buf)
{
int i, cnt;
ulong page_slab, page_flags, name;
ulong *cache_list;
char *retval;
if (!(vt->flags & KMALLOC_SLUB))
return NULL;
if (!is_page_ptr((ulong)si->spec_addr, NULL))
return NULL;
if (!readmem(si->spec_addr + OFFSET(page_flags), KVADDR,
&page_flags, sizeof(ulong), "page.flags",
RETURN_ON_ERROR|QUIET))
return NULL;
if (!(page_flags & (1 << vt->PG_slab)))
return NULL;
if (!readmem(si->spec_addr + OFFSET(page_slab), KVADDR,
&page_slab, sizeof(ulong), "page.slab",
RETURN_ON_ERROR|QUIET))
return NULL;
retval = NULL;
cnt = get_kmem_cache_list(&cache_list);
for (i = 0; i < cnt; i++) {
if (page_slab == cache_list[i]) {
if (!readmem(cache_list[i] + OFFSET(kmem_cache_name),
KVADDR, &name, sizeof(char *),
"kmem_cache.name", QUIET|RETURN_ON_ERROR))
goto bailout;
if (!read_string(name, buf, BUFSIZE-1))
goto bailout;
retval = buf;
break;
}
}
bailout:
FREEBUF(cache_list);
return retval;
}
/*
* Figure out which of the kmem_cache.cpu_slab declarations
* is used by this kernel, and return a pointer to the slab
* page being used. Return the kmem_cache_cpu.freelist pointer
* if requested.
*/
static ulong
get_cpu_slab_ptr(struct meminfo *si, int cpu, ulong *cpu_freelist)
{
ulong cpu_slab_ptr, page, freelist;
if (cpu_freelist)
*cpu_freelist = 0;
switch (vt->cpu_slab_type)
{
case TYPE_CODE_STRUCT:
cpu_slab_ptr = ULONG(si->cache_buf +
OFFSET(kmem_cache_cpu_slab) +
OFFSET(kmem_cache_cpu_page));
if (cpu_freelist && VALID_MEMBER(kmem_cache_cpu_freelist))
*cpu_freelist = ULONG(si->cache_buf +
OFFSET(kmem_cache_cpu_slab) +
OFFSET(kmem_cache_cpu_freelist));
break;
case TYPE_CODE_ARRAY:
cpu_slab_ptr = ULONG(si->cache_buf +
OFFSET(kmem_cache_cpu_slab) + (sizeof(void *)*cpu));
if (cpu_slab_ptr && cpu_freelist &&
VALID_MEMBER(kmem_cache_cpu_freelist)) {
if (readmem(cpu_slab_ptr + OFFSET(kmem_cache_cpu_freelist),
KVADDR, &freelist, sizeof(void *),
"kmem_cache_cpu.freelist", RETURN_ON_ERROR))
*cpu_freelist = freelist;
}
if (cpu_slab_ptr && VALID_MEMBER(kmem_cache_cpu_page)) {
if (!readmem(cpu_slab_ptr + OFFSET(kmem_cache_cpu_page),
KVADDR, &page, sizeof(void *),
"kmem_cache_cpu.page", RETURN_ON_ERROR))
cpu_slab_ptr = 0;
else
cpu_slab_ptr = page;
}
break;
case TYPE_CODE_PTR:
cpu_slab_ptr = ULONG(si->cache_buf + OFFSET(kmem_cache_cpu_slab)) +
kt->__per_cpu_offset[cpu];
if (cpu_slab_ptr && cpu_freelist &&
VALID_MEMBER(kmem_cache_cpu_freelist)) {
if (readmem(cpu_slab_ptr + OFFSET(kmem_cache_cpu_freelist),
KVADDR, &freelist, sizeof(void *),
"kmem_cache_cpu.freelist", RETURN_ON_ERROR))
*cpu_freelist = freelist;
}
if (cpu_slab_ptr && VALID_MEMBER(kmem_cache_cpu_page)) {
if (!readmem(cpu_slab_ptr + OFFSET(kmem_cache_cpu_page),
KVADDR, &page, sizeof(void *),
"kmem_cache_cpu.page", RETURN_ON_ERROR))
cpu_slab_ptr = 0;
else
cpu_slab_ptr = page;
}
break;
default:
cpu_slab_ptr = 0;
error(FATAL, "cannot determine location of kmem_cache.cpu_slab page\n");
}
return cpu_slab_ptr;
}
/*
* In 2.6.27 kmem_cache.order and kmem_cache.objects were merged
* into the kmem_cache.oo, a kmem_cache_order_objects structure.
* oo_order() and oo_objects() emulate the kernel functions
* of the same name.
*/
static unsigned int oo_order(ulong oo)
{
return (oo >> 16);
}
static unsigned int oo_objects(ulong oo)
{
return (oo & ((1 << 16) - 1));
}
#ifdef NOT_USED
ulong
slab_to_kmem_cache_node(struct meminfo *si, ulong slab_page)
{
int node;
ulong node_ptr;
if (vt->flags & CONFIG_NUMA) {
node = page_to_nid(slab_page);
node_ptr = ULONG(si->cache_buf +
OFFSET(kmem_cache_node) +
(sizeof(void *)*node));
} else
node_ptr = si->cache + OFFSET(kmem_cache_local_node);
return node_ptr;
}
ulong
get_kmem_cache_by_name(char *request)
{
int i, cnt;
ulong *cache_list;
ulong name;
char buf[BUFSIZE];
ulong found;
cnt = get_kmem_cache_list(&cache_list);
cache_buf = GETBUF(SIZE(kmem_cache));
found = 0;
for (i = 0; i < cnt; i++) {
readmem(cache_list[i] + OFFSET(kmem_cache_name),
KVADDR, &name, sizeof(char *),
"kmem_cache.name", FAULT_ON_ERROR);
if (!read_string(name, buf, BUFSIZE-1))
continue;
if (STREQ(buf, request)) {
found = cache_list[i];
break;
}
}
FREEBUF(cache_list);
return found;
}
#endif /* NOT_USED */
Reference in New Issue View Git Blame Copy Permalink