From 1f2d799ed0684e94489802502a709822581a537d Mon Sep 17 00:00:00 2001 From: Daan Date: Sat, 2 Mar 2024 14:14:59 -0800 Subject: [PATCH] possible fix for #855 --- src/segment-map.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/src/segment-map.c b/src/segment-map.c index 4c2104bd..a306ec67 100644 --- a/src/segment-map.c +++ b/src/segment-map.c @@ -29,6 +29,7 @@ terms of the MIT license. A copy of the license can be found in the file static _Atomic(uintptr_t) mi_segment_map[MI_SEGMENT_MAP_WSIZE + 1]; // 2KiB per TB with 64MiB segments static size_t mi_segment_map_index_of(const mi_segment_t* segment, size_t* bitidx) { + // note: segment can be invalid or NULL. mi_assert_internal(_mi_ptr_segment(segment + 1) == segment); // is it aligned on MI_SEGMENT_SIZE? if ((uintptr_t)segment >= MI_MAX_ADDRESS) { *bitidx = 0; @@ -70,8 +71,7 @@ void _mi_segment_map_freed_at(const mi_segment_t* segment) { // Determine the segment belonging to a pointer or NULL if it is not in a valid segment. static mi_segment_t* _mi_segment_of(const void* p) { if (p == NULL) return NULL; - mi_segment_t* segment = _mi_ptr_segment(p); - mi_assert_internal(segment != NULL); + mi_segment_t* segment = _mi_ptr_segment(p); // segment can be NULL size_t bitidx; size_t index = mi_segment_map_index_of(segment, &bitidx); // fast path: for any pointer to valid small/medium/large object or first MI_SEGMENT_SIZE in huge