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adding check for ptr cookie to be the same as segment cookie to catch valid pointers when unaligned os memory is provided at allocation

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This commit is contained in:
Blake Taylor 2023-01-26 20:13:49 -08:00
parent dd7348066f
commit c6bbc28da0
1 changed files with 9 additions and 1 deletions
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10
src/segment-cache.c
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@ -385,7 +385,15 @@ static bool mi_is_valid_pointer(const void* p) {
} }
mi_decl_nodiscard mi_decl_export bool mi_is_in_heap_region(const void* p) mi_attr_noexcept { mi_decl_nodiscard mi_decl_export bool mi_is_in_heap_region(const void* p) mi_attr_noexcept {
return mi_is_valid_pointer(p); if mi_likely(mi_is_valid_pointer(p)) {
return true;
}
// when unable to allocate aligned OS memory directly, pointer cookie is same as segment cookie
mi_segment_t* const segment = _mi_ptr_segment(p);
if (segment == NULL) return false;
return (_mi_ptr_cookie(segment) == segment->cookie);
} }
/* /*