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memdebug.h
/*------------------------------------------------------------------------- * * memdebug.h * Memory debugging support. * * Currently, this file either wraps <valgrind/memcheck.h> or substitutes * empty definitions for Valgrind client request macros we use. * * * Portions Copyright (c) 1996-2020, PostgreSQL Global Development Group * Portions Copyright (c) 1994, Regents of the University of California * * src/include/utils/memdebug.h * *------------------------------------------------------------------------- */ #ifndef MEMDEBUG_H #define MEMDEBUG_H #ifdef USE_VALGRIND #include <valgrind/memcheck.h> #else #define VALGRIND_CHECK_MEM_IS_DEFINED(addr, size) do {} while (0) #define VALGRIND_CREATE_MEMPOOL(context, redzones, zeroed) do {} while (0) #define VALGRIND_DESTROY_MEMPOOL(context) do {} while (0) #define VALGRIND_MAKE_MEM_DEFINED(addr, size) do {} while (0) #define VALGRIND_MAKE_MEM_NOACCESS(addr, size) do {} while (0) #define VALGRIND_MAKE_MEM_UNDEFINED(addr, size) do {} while (0) #define VALGRIND_MEMPOOL_ALLOC(context, addr, size) do {} while (0) #define VALGRIND_MEMPOOL_FREE(context, addr) do {} while (0) #define VALGRIND_MEMPOOL_CHANGE(context, optr, nptr, size) do {} while (0) #endif #ifdef CLOBBER_FREED_MEMORY /* Wipe freed memory for debugging purposes */ static inline void wipe_mem(void *ptr, size_t size) { VALGRIND_MAKE_MEM_UNDEFINED(ptr, size); memset(ptr, 0x7F, size); VALGRIND_MAKE_MEM_NOACCESS(ptr, size); } #endif /* CLOBBER_FREED_MEMORY */ #ifdef MEMORY_CONTEXT_CHECKING static inline void set_sentinel(void *base, Size offset) { char *ptr = (char *) base + offset; VALGRIND_MAKE_MEM_UNDEFINED(ptr, 1); *ptr = 0x7E; VALGRIND_MAKE_MEM_NOACCESS(ptr, 1); } static inline bool sentinel_ok(const void *base, Size offset) { const char *ptr = (const char *) base + offset; bool ret; VALGRIND_MAKE_MEM_DEFINED(ptr, 1); ret = *ptr == 0x7E; VALGRIND_MAKE_MEM_NOACCESS(ptr, 1); return ret; } #endif /* MEMORY_CONTEXT_CHECKING */ #ifdef RANDOMIZE_ALLOCATED_MEMORY void randomize_mem(char *ptr, size_t size); #endif /* RANDOMIZE_ALLOCATED_MEMORY */ #endif /* MEMDEBUG_H */
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