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sanitizer_allocator.cpp: Ensure at least sizeof(void*) alignment #84440

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Merged
merged 2 commits into from
Oct 24, 2024
Merged

sanitizer_allocator.cpp: Ensure at least sizeof(void*) alignment #84440

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0bf259f
[𝘀𝗽𝗿] initial version
arichardson Mar 8, 2024
942a6e9
rebase
arichardson Oct 24, 2024
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5 changes: 3 additions & 2 deletions compiler-rt/lib/sanitizer_common/sanitizer_allocator.cpp
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Original file line number Diff line number Diff line change
Expand Up @@ -59,7 +59,7 @@ static void *RawInternalAlloc(uptr size, InternalAllocatorCache *cache,

static void *RawInternalRealloc(void *ptr, uptr size,
InternalAllocatorCache *cache) {
uptr alignment = 8;
constexpr usize alignment = Max<usize>(8, sizeof(void *));
if (cache == 0) {
SpinMutexLock l(&internal_allocator_cache_mu);
return internal_allocator()->Reallocate(&internal_allocator_cache, ptr,
Expand Down Expand Up @@ -137,7 +137,8 @@ void InternalAllocatorUnlock() SANITIZER_NO_THREAD_SAFETY_ANALYSIS {
}

// LowLevelAllocator
constexpr uptr kLowLevelAllocatorDefaultAlignment = 8;
constexpr usize kLowLevelAllocatorDefaultAlignment =
Max<usize>(8, sizeof(void *));
constexpr uptr kMinNumPagesRounded = 16;
constexpr uptr kMinRoundedSize = 65536;
static uptr low_level_alloc_min_alignment = kLowLevelAllocatorDefaultAlignment;
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