1 | // RUN: %clang_hwasan -O0 -DNEGATIVE %s -o %t && %run %t 2>&1 |
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2 | // RUN: %clang_hwasan -O0 %s -o %t && not %run %t 2>&1 | FileCheck %s |
3 | |
4 | // REQUIRES: pointer-tagging |
5 | |
6 | #include <stdlib.h> |
7 | #include <assert.h> |
8 | #include <sanitizer/hwasan_interface.h> |
9 | |
10 | __attribute__((noinline)) |
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(sp_dst: caller_frame); |
19 | #endif |
20 | return p[0]; |
21 | } |
22 | |
23 | int main() { |
24 | return f(caller_frame: __builtin_frame_address(0)); |
25 | // CHECK: READ of size 8 at {{.*}} tags: {{.*}}/00 (ptr/mem) |
26 | } |
27 |