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

[David Justo via llvm-commits]

================
@@ -0,0 +1,27 @@
+// RUN: %clangxx_asan -O0 %s -o %t
+// RUN: %run %t 2>&1
----------------
davidmrdavid wrote:

Ah, good catch, thanks for letting me know. I was somehow under the impression that the `CHECK` pattern was implicitly always checked. I merged the tests, based on your suggestion, so that address this issue as well.

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