llvm-project.git/compiler-rt/test/asan/TestCases/zero_alloc.cpp, branch users/mingmingl-llvm/samplefdo-profile-format

[asan] Change zero_alloc.cpp testcase to use stdlib.h, re-enable on Mac (#156490)

2025-09-02T19:48:31+00:00

Avoid build breakage on Mac (reported at
https://github.com/llvm/llvm-project/pull/155943#issuecomment-3244593484)

Mark asan/TestCases/zero_alloc.cpp unsupported on Mac for now

2025-09-02T09:46:04+00:00

It's failing due to the malloc.h include, see comment on
https://github.com/llvm/llvm-project/pull/155943

[asan] Detect dereferencing zero-alloc as heap buffer overflow (#155943)

2025-08-29T17:19:47+00:00

When a zero-byte allocation is requested, ASan actually allocates 1-byte
for compatibility. This change poisons that byte, to detect
dereferences.

Also updates the test from #155933

[asan] Add test for deferencing zero-sized malloc/calloc (#155933)

2025-08-28T22:48:52+00:00

ASan fails to catch this, because 0-byte allocations are converted into
1-byte allocations.

Bug originally reported by dvyukov