mirror of
https://github.com/MariaDB/server.git
synced 2025-01-15 19:42:28 +01:00
4faef6e240
The purpose of the compress() wrapper my_compress_buffer() was twofold: silence Valgrind warnings about uninitialized memory access before zlib 1.2.4, and have PERFORMANCE_SCHEMA instrumentation of some zlib related memory allocation. Because of PERFORMANCE_SCHEMA, we cannot trivially replace my_compress_buffer() with compress(). az_open(): Remove a crc32() call. Any CRC of the empty string is 0.
104 lines
4.4 KiB
C
104 lines
4.4 KiB
C
/* Copyright (C) 2010, 2022, MariaDB Corporation.
|
|
|
|
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; version 2 of the License.
|
|
|
|
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 02110-1335 USA */
|
|
|
|
#ifndef MY_VALGRIND_INCLUDED
|
|
#define MY_VALGRIND_INCLUDED
|
|
|
|
/* clang -> gcc */
|
|
#ifndef __has_feature
|
|
# define __has_feature(x) 0
|
|
#endif
|
|
#if __has_feature(address_sanitizer)
|
|
# define __SANITIZE_ADDRESS__ 1
|
|
#endif
|
|
|
|
#if __has_feature(memory_sanitizer)
|
|
# include <sanitizer/msan_interface.h>
|
|
# define HAVE_valgrind
|
|
# define HAVE_MEM_CHECK
|
|
# define MEM_UNDEFINED(a,len) __msan_allocated_memory(a,len)
|
|
# define MEM_MAKE_ADDRESSABLE(a,len) MEM_UNDEFINED(a,len)
|
|
# define MEM_MAKE_DEFINED(a,len) __msan_unpoison(a,len)
|
|
# define MEM_NOACCESS(a,len) ((void) 0)
|
|
# define MEM_CHECK_ADDRESSABLE(a,len) ((void) 0)
|
|
# define MEM_CHECK_DEFINED(a,len) __msan_check_mem_is_initialized(a,len)
|
|
# define MEM_GET_VBITS(a,b,len) __msan_copy_shadow(b,a,len)
|
|
# define MEM_SET_VBITS(a,b,len) __msan_copy_shadow(a,b,len)
|
|
# define REDZONE_SIZE 8
|
|
# ifdef __linux__
|
|
# define MSAN_STAT_WORKAROUND(st) MEM_MAKE_DEFINED(st, sizeof(*st))
|
|
# else
|
|
# define MSAN_STAT_WORKAROUND(st) ((void) 0)
|
|
# endif
|
|
#elif defined(HAVE_VALGRIND_MEMCHECK_H) && defined(HAVE_valgrind)
|
|
# include <valgrind/memcheck.h>
|
|
# define HAVE_MEM_CHECK
|
|
# define MEM_UNDEFINED(a,len) VALGRIND_MAKE_MEM_UNDEFINED(a,len)
|
|
# define MEM_MAKE_ADDRESSABLE(a,len) MEM_UNDEFINED(a,len)
|
|
# define MEM_MAKE_DEFINED(a,len) VALGRIND_MAKE_MEM_DEFINED(a,len)
|
|
# define MEM_NOACCESS(a,len) VALGRIND_MAKE_MEM_NOACCESS(a,len)
|
|
# define MEM_CHECK_ADDRESSABLE(a,len) VALGRIND_CHECK_MEM_IS_ADDRESSABLE(a,len)
|
|
# define MEM_CHECK_DEFINED(a,len) VALGRIND_CHECK_MEM_IS_DEFINED(a,len)
|
|
# define MEM_GET_VBITS(a,b,len) VALGRIND_GET_VBITS(a,b,len)
|
|
# define MEM_SET_VBITS(a,b,len) VALGRIND_SET_VBITS(a,b,len)
|
|
# define REDZONE_SIZE 8
|
|
# define MSAN_STAT_WORKAROUND(st) ((void) 0)
|
|
#elif defined(__SANITIZE_ADDRESS__) && (!defined(_MSC_VER) || defined (__clang__))
|
|
# include <sanitizer/asan_interface.h>
|
|
/* How to do manual poisoning:
|
|
https://github.com/google/sanitizers/wiki/AddressSanitizerManualPoisoning */
|
|
# define MEM_UNDEFINED(a,len) ((void) 0)
|
|
# define MEM_MAKE_ADDRESSABLE(a,len) ASAN_UNPOISON_MEMORY_REGION(a,len)
|
|
# define MEM_MAKE_DEFINED(a,len) ((void) 0)
|
|
# define MEM_NOACCESS(a,len) ASAN_POISON_MEMORY_REGION(a,len)
|
|
# define MEM_CHECK_ADDRESSABLE(a,len) \
|
|
assert(!__asan_region_is_poisoned((void*) a,len))
|
|
# define MEM_CHECK_DEFINED(a,len) ((void) 0)
|
|
# define MEM_GET_VBITS(a,b,len) ((void) 0)
|
|
# define MEM_SET_VBITS(a,b,len) ((void) 0)
|
|
# define MSAN_STAT_WORKAROUND(st) ((void) 0)
|
|
# define REDZONE_SIZE 8
|
|
#else
|
|
# define MEM_UNDEFINED(a,len) ((void) 0)
|
|
# define MEM_MAKE_ADDRESSABLE(a,len) ((void) 0)
|
|
# define MEM_MAKE_DEFINED(a,len) ((void) 0)
|
|
# define MEM_NOACCESS(a,len) ((void) 0)
|
|
# define MEM_CHECK_ADDRESSABLE(a,len) ((void) 0)
|
|
# define MEM_CHECK_DEFINED(a,len) ((void) 0)
|
|
# define MEM_GET_VBITS(a,b,len) ((void) 0)
|
|
# define MEM_SET_VBITS(a,b,len) ((void) 0)
|
|
# define REDZONE_SIZE 0
|
|
# define MSAN_STAT_WORKAROUND(st) ((void) 0)
|
|
#endif /* __has_feature(memory_sanitizer) */
|
|
|
|
#ifdef TRASH_FREED_MEMORY
|
|
/*
|
|
_TRASH_FILL() has to call MEM_MAKE_ADDRESSABLE() to cancel any effect of
|
|
TRASH_FREE().
|
|
This can happen in the case one does
|
|
TRASH_ALLOC(A,B) ; TRASH_FREE(A,B) ; TRASH_ALLOC(A,B)
|
|
to reuse the same memory in an internal memory allocator like MEM_ROOT.
|
|
_TRASH_FILL() is an internal function and should not be used externally.
|
|
*/
|
|
#define _TRASH_FILL(A,B,C) do { const size_t trash_tmp= (B); MEM_MAKE_ADDRESSABLE(A, trash_tmp); memset(A, C, trash_tmp); } while (0)
|
|
#else
|
|
#define _TRASH_FILL(A,B,C) do { MEM_UNDEFINED((A), (B)); } while (0)
|
|
#endif
|
|
/** Note that some memory became allocated and/or uninitialized. */
|
|
#define TRASH_ALLOC(A,B) do { _TRASH_FILL(A,B,0xA5); MEM_MAKE_ADDRESSABLE(A,B); } while(0)
|
|
/** Note that some memory became freed. (Prohibit further access to it.) */
|
|
#define TRASH_FREE(A,B) do { _TRASH_FILL(A,B,0x8F); MEM_NOACCESS(A,B); } while(0)
|
|
|
|
#endif /* MY_VALGRIND_INCLUDED */
|