83 lines
2.1 KiB
C
83 lines
2.1 KiB
C
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/*-------------------------------------------------------------------------
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*
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* memdebug.h
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* Memory debugging support.
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*
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* Currently, this file either wraps <valgrind/memcheck.h> or substitutes
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* empty definitions for Valgrind client request macros we use.
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*
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*
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* Portions Copyright (c) 1996-2023, PostgreSQL Global Development Group
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* Portions Copyright (c) 1994, Regents of the University of California
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*
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* src/include/utils/memdebug.h
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*
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*-------------------------------------------------------------------------
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*/
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#ifndef MEMDEBUG_H
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#define MEMDEBUG_H
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#ifdef USE_VALGRIND
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#include <valgrind/memcheck.h>
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#else
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#define VALGRIND_CHECK_MEM_IS_DEFINED(addr, size) do {} while (0)
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#define VALGRIND_CREATE_MEMPOOL(context, redzones, zeroed) do {} while (0)
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#define VALGRIND_DESTROY_MEMPOOL(context) do {} while (0)
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#define VALGRIND_MAKE_MEM_DEFINED(addr, size) do {} while (0)
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#define VALGRIND_MAKE_MEM_NOACCESS(addr, size) do {} while (0)
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#define VALGRIND_MAKE_MEM_UNDEFINED(addr, size) do {} while (0)
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#define VALGRIND_MEMPOOL_ALLOC(context, addr, size) do {} while (0)
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#define VALGRIND_MEMPOOL_FREE(context, addr) do {} while (0)
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#define VALGRIND_MEMPOOL_CHANGE(context, optr, nptr, size) do {} while (0)
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#endif
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#ifdef CLOBBER_FREED_MEMORY
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/* Wipe freed memory for debugging purposes */
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static inline void
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wipe_mem(void *ptr, size_t size)
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{
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VALGRIND_MAKE_MEM_UNDEFINED(ptr, size);
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memset(ptr, 0x7F, size);
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VALGRIND_MAKE_MEM_NOACCESS(ptr, size);
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}
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#endif /* CLOBBER_FREED_MEMORY */
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#ifdef MEMORY_CONTEXT_CHECKING
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static inline void
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set_sentinel(void *base, Size offset)
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{
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char *ptr = (char *) base + offset;
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VALGRIND_MAKE_MEM_UNDEFINED(ptr, 1);
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*ptr = 0x7E;
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VALGRIND_MAKE_MEM_NOACCESS(ptr, 1);
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}
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static inline bool
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sentinel_ok(const void *base, Size offset)
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{
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const char *ptr = (const char *) base + offset;
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bool ret;
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VALGRIND_MAKE_MEM_DEFINED(ptr, 1);
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ret = *ptr == 0x7E;
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VALGRIND_MAKE_MEM_NOACCESS(ptr, 1);
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return ret;
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}
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#endif /* MEMORY_CONTEXT_CHECKING */
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#ifdef RANDOMIZE_ALLOCATED_MEMORY
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void randomize_mem(char *ptr, size_t size);
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#endif /* RANDOMIZE_ALLOCATED_MEMORY */
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#endif /* MEMDEBUG_H */
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