[compiler-rt] [ASan] Honor `allocator_may_return_null` when set through user-function and fix large alloc edge case (PR #117929)

[Vitaly Buka via llvm-commits]

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@@ -85,8 +85,12 @@ static void NORETURN ReportInternalAllocatorOutOfMemory(uptr requested_size) {
 
 void *InternalAlloc(uptr size, InternalAllocatorCache *cache, uptr alignment) {
   void *p = RawInternalAlloc(size, cache, alignment);
-  if (UNLIKELY(!p))
+  if (UNLIKELY(!p)) {
+    if (AllocatorMayReturnNull()) {
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vitalybuka wrote:

This is internal allocator, and I don't think internal users expect  NULL

https://github.com/llvm/llvm-project/pull/117929