[compiler-rt] [asan] Add experimental 'track_poison' flag (PR #133175)

[Thurston Dang via llvm-commits]

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@@ -0,0 +1,47 @@
+// Check that __asan_poison_memory_region and ASAN_OPTIONS=track_poison work.
+//
+// RUN: %clangxx_asan -O0 %s -o %t && env ASAN_OPTIONS=track_poison=1000 not %run %t       2>&1 | FileCheck %s --check-prefixes=CHECK-AC,CHECK-A
+// RUN: %clangxx_asan -O0 %s -o %t && env ASAN_OPTIONS=track_poison=1000     %run %t 20    2>&1 | FileCheck %s --check-prefixes=CHECK-B
+// RUN: %clangxx_asan -O0 %s -o %t && env ASAN_OPTIONS=track_poison=1000 not %run %t 30 30 2>&1 | FileCheck %s --check-prefixes=CHECK-AC,CHECK-C
+
+#include <stdio.h>
+#include <stdlib.h>
+
+extern "C" void __asan_poison_memory_region(void *, size_t);
+extern "C" void __asan_unpoison_memory_region(void *, size_t);
+
+void novichok(char *x) {
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thurstond wrote:

I've put in a boring function name instead

https://github.com/llvm/llvm-project/pull/133175