1 // RUN: %clang_hwasan -O0 -DNEGATIVE %s -o %t && %run %t 2>&1
2 // RUN: %clang_hwasan -O0 %s -o %t && not %run %t 2>&1 | FileCheck %s
3 
4 // REQUIRES: stable-runtime
5 
6 #include <stdlib.h>
7 #include <assert.h>
8 #include <sanitizer/hwasan_interface.h>
9 
10 __attribute__((noinline))
f(void * caller_frame)11 int f(void *caller_frame) {
12   int z = 0;
13   int *volatile p = &z;
14   // Tag of local is never zero.
15   assert(__hwasan_tag_pointer(p, 0) != p);
16 #ifndef NEGATIVE
17   // This will destroy shadow of "z", and the following load will crash.
18   __hwasan_handle_longjmp(caller_frame);
19 #endif
20   return p[0];
21 }
22 
main()23 int main() {
24   return f(__builtin_frame_address(0));
25   // CHECK: READ of size 8 at {{.*}} tags: {{.*}}/00 (ptr/mem)
26 }
27