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Close #18596: Support address sanity checking in clang/GCC

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This patch appropriately marks known false alarms in the
small object allocator when address sanity checking is
enabled (patch contributed by Dhiru Kholia).
This commit is contained in:
Nick Coghlan 2013-09-29 00:28:55 +10:00
parent 4cc2afa0ec
commit 6ba64f454d
3 changed files with 28 additions and 0 deletions
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20
Objects/obmalloc.c
View file

@ -12,6 +12,24 @@ static void _PyObject_DebugDumpAddress(const void *p);
static void _PyMem_DebugCheckAddress(char api_id, const void *p);
#endif
#if defined(__has_feature) /* Clang */
#if __has_feature(address_sanitizer) /* is ASAN enabled? */
#define ATTRIBUTE_NO_ADDRESS_SAFETY_ANALYSIS \
__attribute__((no_address_safety_analysis)) \
__attribute__ ((noinline))
#else
#define ATTRIBUTE_NO_ADDRESS_SAFETY_ANALYSIS
#endif
#else
#if defined(__SANITIZE_ADDRESS__) /* GCC 4.8.x, is ASAN enabled? */
#define ATTRIBUTE_NO_ADDRESS_SAFETY_ANALYSIS \
__attribute__((no_address_safety_analysis)) \
__attribute__ ((noinline))
#else
#define ATTRIBUTE_NO_ADDRESS_SAFETY_ANALYSIS
#endif
#endif
#ifdef WITH_PYMALLOC
#ifdef MS_WINDOWS
@ -1300,6 +1318,7 @@ redirect:
/* free */
ATTRIBUTE_NO_ADDRESS_SAFETY_ANALYSIS
static void
_PyObject_Free(void *ctx, void *p)
{
@ -1528,6 +1547,7 @@ redirect:
* return a non-NULL result.
*/
ATTRIBUTE_NO_ADDRESS_SAFETY_ANALYSIS
static void *
_PyObject_Realloc(void *ctx, void *p, size_t nbytes)
{