1 files changed, 26 insertions, 0 deletions
diff --git a/test/hwasan/TestCases/longjmp.c b/test/hwasan/TestCases/longjmp.c
new file mode 100644
index 0000000000000..8d847b54b275a
--- /dev/null
+++ b/test/hwasan/TestCases/longjmp.c
@@ -0,0 +1,26 @@
+// RUN: %clang_hwasan -O0 -DNEGATIVE %s -o %t && %run %t 2>&1
+// RUN: %clang_hwasan -O0 %s -o %t && not %run %t 2>&1 | FileCheck %s
+
+// REQUIRES: stable-runtime
+
+#include <stdlib.h>
+#include <assert.h>
+#include <sanitizer/hwasan_interface.h>
+
+__attribute__((noinline))
+int f(void *caller_frame) {
+  int z = 0;
+  int *volatile p = &z;
+  // Tag of local is never zero.
+  assert(__hwasan_tag_pointer(p, 0) != p);
+#ifndef NEGATIVE
+  // This will destroy shadow of "z", and the following load will crash.
+  __hwasan_handle_longjmp(caller_frame);
+#endif
+  return p[0];
+}
+
+int main() {
+  return f(__builtin_frame_address(0));
+  // CHECK: READ of size 8 at {{.*}} tags: {{.*}}/00 (ptr/mem)
+}