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Make useful infrastructure from aset.c generally available.

Browse Source 
An upcoming patch introduces a new type of memory context. To avoid
duplicating debugging infrastructure within aset.c, move useful pieces
to memdebug.[ch].

While touching aset.c, fix printf format code in AllocFree* debug
macros.

Author: Tomas Vondra
Reviewed-By: Andres Freund
Discussion: https://postgr.es/m/b3b2245c-b37a-e1e5-ebc4-857c914bc747@2ndquadrant.com
This commit is contained in:
Andres Freund
2017-02-27 03:41:44 -08:00
parent 1513dbea7f
commit bfd12cccbd
4 changed files with 144 additions and 114 deletions
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48
src/include/utils/memdebug.h
View File

@@ -31,4 +31,52 @@
#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 */