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btrfs-progs
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btrfs-progs: add option to disable backtrace usage 

This commit adds the support for a make variable named
"DISABLE_BACKTRACE" which allows to disable the support for backtrace()
usage on ASSERT(), BUG() and BUG_ON() calls.
This is useful because some alternative C libraries like uClibc have
optional support for backtrace() which is rarely built when debugging
isn't taking place.

Signed-off-by: Gustavo Zacarias <gustavo@zacarias.com.ar>
Signed-off-by: David Sterba <dsterba@suse.cz>
This commit is contained in:
Gustavo Zacarias 2014-10-07 11:09:04 -03:00 committed by David Sterba
parent cb37bf83cc
commit 05499d865f
2 changed files with 19 additions and 0 deletions
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4
Makefile
View File

@ -63,6 +63,10 @@ BUILDDIRS = $(patsubst %,build-%,$(SUBDIRS))
INSTALLDIRS = $(patsubst %,install-%,$(SUBDIRS)) INSTALLDIRS = $(patsubst %,install-%,$(SUBDIRS))
CLEANDIRS = $(patsubst %,clean-%,$(SUBDIRS)) CLEANDIRS = $(patsubst %,clean-%,$(SUBDIRS))
ifeq ($(DISABLE_BACKTRACE),1)
AM_CFLAGS += -DBTRFS_DISABLE_BACKTRACE
endif
ifneq ($(DISABLE_DOCUMENTATION),1) ifneq ($(DISABLE_DOCUMENTATION),1)
BUILDDIRS += build-Documentation BUILDDIRS += build-Documentation
INSTALLDIRS += install-Documentation INSTALLDIRS += install-Documentation

15
kerncompat.h
View File

@ -29,7 +29,9 @@
#include <stddef.h> #include <stddef.h>
#include <linux/types.h> #include <linux/types.h>
#include <stdint.h> #include <stdint.h>
#ifndef BTRFS_DISABLE_BACKTRACE
#include <execinfo.h> #include <execinfo.h>
#endif
#define ptr_to_u64(x) ((u64)(uintptr_t)x) #define ptr_to_u64(x) ((u64)(uintptr_t)x)
#define u64_to_ptr(x) ((void *)(uintptr_t)x) #define u64_to_ptr(x) ((void *)(uintptr_t)x)
@ -55,6 +57,7 @@
#define ULONG_MAX (~0UL) #define ULONG_MAX (~0UL)
#endif #endif
#ifndef BTRFS_DISABLE_BACKTRACE
#define MAX_BACKTRACE 16 #define MAX_BACKTRACE 16
static inline void print_trace(void) static inline void print_trace(void)
{ {
@ -81,6 +84,9 @@ static inline void assert_trace(const char *assertion, const char *filename,
} }
#define BUG() assert_trace(NULL, __FILE__, __func__, __LINE__, 0) #define BUG() assert_trace(NULL, __FILE__, __func__, __LINE__, 0)
#else
#define BUG() assert(0)
#endif
#ifdef __CHECKER__ #ifdef __CHECKER__
#define __force __attribute__((force)) #define __force __attribute__((force))
@ -264,10 +270,19 @@ static inline long IS_ERR(const void *ptr)
#define kstrdup(x, y) strdup(x) #define kstrdup(x, y) strdup(x)
#define kfree(x) free(x) #define kfree(x) free(x)
#ifndef BTRFS_DISABLE_BACKTRACE
#define BUG_ON(c) assert_trace(#c, __FILE__, __func__, __LINE__, !(c)) #define BUG_ON(c) assert_trace(#c, __FILE__, __func__, __LINE__, !(c))
#else
#define BUG_ON(c) assert(!(c))
#endif
#define WARN_ON(c) BUG_ON(c) #define WARN_ON(c) BUG_ON(c)
#ifndef BTRFS_DISABLE_BACKTRACE
#define ASSERT(c) assert_trace(#c, __FILE__, __func__, __LINE__, (c)) #define ASSERT(c) assert_trace(#c, __FILE__, __func__, __LINE__, (c))
#else
#define ASSERT(c) assert(c)
#endif
#define container_of(ptr, type, member) ({ \ #define container_of(ptr, type, member) ({ \
const typeof( ((type *)0)->member ) *__mptr = (ptr); \ const typeof( ((type *)0)->member ) *__mptr = (ptr); \