mirror of https://github.com/schoebel/mars
131 lines
3.9 KiB
C
131 lines
3.9 KiB
C
/*
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* MARS Long Distance Replication Software
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*
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* This file is part of MARS project: http://schoebel.github.io/mars/
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*
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* Copyright (C) 2010-2014 Thomas Schoebel-Theuer
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* Copyright (C) 2011-2014 1&1 Internet AG
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License along
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* with this program; if not, write to the Free Software Foundation, Inc.,
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* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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*/
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#ifndef BRICK_CHECKING_H
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#define BRICK_CHECKING_H
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/////////////////////////////////////////////////////////////////////////
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// checking
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#if defined(CONFIG_MARS_DEBUG) || defined(CONFIG_MARS_CHECKS)
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#define BRICK_CHECKING true
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#else
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#define BRICK_CHECKING false
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#endif
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#define _CHECK_ATOMIC(atom,OP,minval) \
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do { \
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if (BRICK_CHECKING) { \
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int __test = atomic_read(atom); \
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if (unlikely(__test OP (minval))) { \
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atomic_set(atom, minval); \
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BRICK_ERR("%d: atomic " #atom " " #OP " " #minval " (%d)\n", __LINE__, __test); \
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} \
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} \
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} while (0)
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#define CHECK_ATOMIC(atom,minval) \
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_CHECK_ATOMIC(atom, <, minval)
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#define CHECK_HEAD_EMPTY(head) \
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do { \
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if (BRICK_CHECKING && \
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unlikely(!list_empty(head) && \
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(head)->next && \
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(head)->next != LIST_POISON1 && \
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(head)->prev != LIST_POISON2)) { \
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list_del_init(head); \
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BRICK_ERR("%d: list_head " #head " (%p) not empty\n", __LINE__, head); \
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} \
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} while (0)
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#ifdef CONFIG_MARS_DEBUG_MEM
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#define CHECK_PTR_DEAD(ptr,label) \
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do { \
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if (BRICK_CHECKING && \
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unlikely( \
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((unsigned long)(ptr) & 0xffffffff) == 0x5a5a5a5a || \
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((unsigned long)(ptr) & 0xffffffff) == 0x6b6b6b6b)) { \
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BRICK_FAT("%d: pointer '" #ptr "' is DEAD\n", __LINE__); \
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goto label; \
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} \
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} while (0)
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#else
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#define CHECK_PTR_DEAD(ptr,label) /*empty*/
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#endif
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/* Counterpart of CHECK_PTR_NULL().
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* Most of the consequences should be caught by the compiler,
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* without producing code (potentially except some debugging code).
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* Otherwise, or when dump_stack()ing at runtime, code inspection should be
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* tightened.
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* So this is essentially a self-check against common bugs, often introduced
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* during reorgs.
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*/
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#ifdef BRICK_CHECKING
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#define SET_PTR_NULL(ptr) (ptr) = NULL
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#else
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#define SET_PTR_NULL(ptr) /* empty */
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#endif
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#define CHECK_PTR_NULL(ptr,label) \
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do { \
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CHECK_PTR_DEAD(ptr, label); \
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if (BRICK_CHECKING && unlikely(!(ptr))) { \
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BRICK_FAT("%d: pointer '" #ptr "' is NULL\n", __LINE__); \
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goto label; \
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} \
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} while (0)
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#ifdef CONFIG_MARS_DEBUG
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#define CHECK_PTR(ptr,label) \
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do { \
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CHECK_PTR_NULL(ptr, label); \
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if (BRICK_CHECKING && unlikely(!virt_addr_valid(ptr))) { \
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BRICK_FAT("%d: pointer '" #ptr "' (%p) is no valid virtual KERNEL address\n", __LINE__, ptr); \
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goto label; \
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} \
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} while (0)
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#else
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#define CHECK_PTR(ptr,label) CHECK_PTR_NULL(ptr,label)
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#endif
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#define CHECK_ASPECT(a_ptr, o_ptr,label) \
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do { \
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if (BRICK_CHECKING && unlikely((a_ptr)->object != o_ptr)) { \
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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); \
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goto label; \
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} \
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} while (0)
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#define _CHECK(ptr,label) \
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do { \
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if (BRICK_CHECKING && unlikely(!(ptr))) { \
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BRICK_FAT("%d: condition '" #ptr "' is VIOLATED\n", __LINE__); \
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goto label; \
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} \
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} while (0)
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#endif
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