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Provide is_zend_ptr() function to check if a pointer lays in Zend MM heap.

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This commit is contained in:
Dmitry Stogov 2018-12-12 13:02:28 +03:00
parent 05f3706588
commit 4d0a2f68a9
2 changed files with 35 additions and 0 deletions
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34
Zend/zend_alloc.c
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@ -2376,6 +2376,40 @@ ZEND_API int is_zend_mm(void)
#endif #endif
} }
ZEND_API int is_zend_ptr(const void *ptr)
{
#if ZEND_MM_CUSTOM
if (AG(mm_heap)->use_custom_heap) {
return 0;
}
#endif
if (AG(mm_heap)->main_chunk) {
zend_mm_chunk *chunk = AG(mm_heap)->main_chunk;
do {
if (ptr >= (void*)chunk
&& ptr < (void*)((char*)chunk + ZEND_MM_CHUNK_SIZE)) {
return 1;
}
chunk = chunk->next;
} while (chunk != AG(mm_heap)->main_chunk);
}
if (AG(mm_heap)->huge_list) {
zend_mm_huge_list *block = AG(mm_heap)->huge_list;
do {
if (ptr >= (void*)block
&& ptr < (void*)((char*)block + block->size)) {
return 1;
}
block = block->next;
} while (block != AG(mm_heap)->huge_list);
}
return 0;
}
#if !ZEND_DEBUG && defined(HAVE_BUILTIN_CONSTANT_P) #if !ZEND_DEBUG && defined(HAVE_BUILTIN_CONSTANT_P)
#undef _emalloc #undef _emalloc

1
Zend/zend_alloc.h
View file

@ -224,6 +224,7 @@ ZEND_API int zend_set_memory_limit(size_t memory_limit);
ZEND_API void start_memory_manager(void); ZEND_API void start_memory_manager(void);
ZEND_API void shutdown_memory_manager(int silent, int full_shutdown); ZEND_API void shutdown_memory_manager(int silent, int full_shutdown);
ZEND_API int is_zend_mm(void); ZEND_API int is_zend_mm(void);
ZEND_API int is_zend_ptr(const void *ptr);
ZEND_API size_t zend_memory_usage(int real_usage); ZEND_API size_t zend_memory_usage(int real_usage);
ZEND_API size_t zend_memory_peak_usage(int real_usage); ZEND_API size_t zend_memory_peak_usage(int real_usage);