[compiler-rt] [HWASAN] Add test to detected use after free in memcmp (PR #67204)

[Florian Mayer via llvm-commits]

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@@ -0,0 +1,15 @@
+// RUN: %clangxx -O0 %s -o %t && %run %t
+// XFAIL: *
+// UNSUPPORTED: lsan, ubsan
+// FIXME: HWASAN should work when we have intercepptors.
+// UNSUPPORTED: hwasan
+
+#include <cstring>
+#include <cstdio>
+
+int main(int argc, char** argv) {
+  int *x = new int(7);
+  delete x;
+  // Trigger use after free error.
+  return memcmp(x, &argc, sizeof(int)) == 0 ? 1 : 0;
+}
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fmayer wrote:

Please add newline at EOF.

https://github.com/llvm/llvm-project/pull/67204