[flang] [clang] [mlir] [llvm] [libcxx] [compiler-rt] [libc] [lldb] [openmp] [hwasan] Classify stack overflow, and use after scope (PR #76133)

[Vitaly Buka via cfe-commits]

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@@ -0,0 +1,25 @@
+// RUN: %clang_hwasan -g %s -o %t && not %run %t 2>&1 | FileCheck %s
+
+// Stack histories currently are not recorded on x86.
+// XFAIL: target=x86_64{{.*}}
+
+__attribute((noinline)) void buggy() {
+  char c[64];
+  char *volatile p = c;
+  p[-2] = 0;
+}
+
+int main() {
+  buggy();
+  // CHECK: WRITE of size 1 at
+  // CHECK: #0 {{.*}} in buggy{{.*}}stack-underflow.c:[[@LINE-6]]
+  // CHECK: Cause: stack tag-mismatch
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vitalybuka wrote:

The first one is true, the second one is "Potentially"

https://github.com/llvm/llvm-project/pull/76133