mars/kernel/brick_checking.h

127 lines
3.8 KiB
C
Raw Normal View History

2014-11-21 10:51:34 +00:00
/*
* MARS Long Distance Replication Software
*
* This file is part of MARS project: http://schoebel.github.io/mars/
*
* Copyright (C) 2010-2014 Thomas Schoebel-Theuer
* Copyright (C) 2011-2014 1&1 Internet AG
*
* 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.
*
* You should have received a copy of the GNU General Public License along
* with this program; if not, write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
#ifndef BRICK_CHECKING_H
#define BRICK_CHECKING_H
/////////////////////////////////////////////////////////////////////////
// checking
2013-04-26 19:05:35 +00:00
#if defined(CONFIG_MARS_DEBUG) || defined(CONFIG_MARS_CHECKS)
#define BRICK_CHECKING true
#else
#define BRICK_CHECKING false
#endif
#define _CHECK_ATOMIC(atom,OP,minval) \
2012-02-07 17:44:10 +00:00
do { \
if (BRICK_CHECKING) { \
int __test = atomic_read(atom); \
2013-04-26 19:05:35 +00:00
if (unlikely(__test OP (minval))) { \
atomic_set(atom, minval); \
BRICK_ERR("%d: atomic " #atom " " #OP " " #minval " (%d)\n", __LINE__, __test); \
} \
2012-02-07 17:44:10 +00:00
} \
} while (0)
#define CHECK_ATOMIC(atom,minval) \
_CHECK_ATOMIC(atom, <, minval)
#define CHECK_HEAD_EMPTY(head) \
2012-02-07 17:44:10 +00:00
do { \
if (BRICK_CHECKING && unlikely(!list_empty(head) && (head)->next)) { \
list_del_init(head); \
BRICK_ERR("%d: list_head " #head " (%p) not empty\n", __LINE__, head); \
} \
2012-02-07 17:44:10 +00:00
} while (0)
2013-04-26 19:05:35 +00:00
#ifdef CONFIG_MARS_DEBUG_MEM
2012-02-07 17:44:10 +00:00
#define CHECK_PTR_DEAD(ptr,label) \
do { \
if (BRICK_CHECKING && \
unlikely( \
((unsigned long)(ptr) & 0xffffffff) == 0x5a5a5a5a || \
((unsigned long)(ptr) & 0xffffffff) == 0x6b6b6b6b)) { \
2012-02-07 17:44:10 +00:00
BRICK_FAT("%d: pointer '" #ptr "' is DEAD\n", __LINE__); \
goto label; \
} \
} while (0)
2013-04-26 19:05:35 +00:00
#else
#define CHECK_PTR_DEAD(ptr,label) /*empty*/
#endif
2022-07-11 12:34:55 +00:00
/* Counterpart of CHECK_PTR_NULL().
* Most of the consequences should be caught by the compiler,
* without producing code (potentially except some debugging code).
* Otherwise, or when dump_stack()ing at runtime, code inspection should be
* tightened.
* So this is essentially a self-check against common bugs, often introduced
* during reorgs.
*/
#ifdef BRICK_CHECKING
#define SET_PTR_NULL(ptr) (ptr) = NULL
#else
#define SET_PTR_NULL(ptr) /* empty */
#endif
#define CHECK_PTR_NULL(ptr,label) \
2012-02-07 17:44:10 +00:00
do { \
CHECK_PTR_DEAD(ptr, label); \
if (BRICK_CHECKING && unlikely(!(ptr))) { \
BRICK_FAT("%d: pointer '" #ptr "' is NULL\n", __LINE__); \
goto label; \
2012-02-07 17:44:10 +00:00
} \
} while (0)
2013-04-26 19:05:35 +00:00
#ifdef CONFIG_MARS_DEBUG
#define CHECK_PTR(ptr,label) \
2012-02-07 17:44:10 +00:00
do { \
CHECK_PTR_NULL(ptr, label); \
2012-02-07 17:44:10 +00:00
if (BRICK_CHECKING && unlikely(!virt_addr_valid(ptr))) { \
BRICK_FAT("%d: pointer '" #ptr "' (%p) is no valid virtual KERNEL address\n", __LINE__, ptr); \
goto label; \
2012-02-07 17:44:10 +00:00
} \
} while (0)
2013-04-26 19:05:35 +00:00
#else
#define CHECK_PTR(ptr,label) CHECK_PTR_NULL(ptr,label)
#endif
2012-12-07 10:30:04 +00:00
#define CHECK_ASPECT(a_ptr, o_ptr,label) \
do { \
if (BRICK_CHECKING && unlikely((a_ptr)->object != o_ptr)) { \
BRICK_FAT("%d: aspect pointer '" #a_ptr "' (%p) belongs to object %p, not to " #o_ptr " (%p)\n", __LINE__, a_ptr, (a_ptr)->object, o_ptr); \
goto label; \
} \
} while (0)
#define _CHECK(ptr,label) \
2012-02-07 17:44:10 +00:00
do { \
if (BRICK_CHECKING && unlikely(!(ptr))) { \
BRICK_FAT("%d: condition '" #ptr "' is VIOLATED\n", __LINE__); \
goto label; \
2012-02-07 17:44:10 +00:00
} \
} while (0)
#endif