1 | // RUN: %clangxx_hwasan -mllvm -hwasan-use-stack-safety=0 -O2 %s -o %t && \ |
2 | // RUN: %run %t 2>&1 |
3 | |
4 | // REQUIRES: aarch64-target-arch || riscv64-target-arch |
5 | |
6 | #include <sanitizer/hwasan_interface.h> |
7 | #include <setjmp.h> |
8 | #include <stdlib.h> |
9 | #include <string.h> |
10 | |
11 | #include <sys/types.h> |
12 | #include <unistd.h> |
13 | |
14 | volatile const char *stackbuf = nullptr; |
15 | jmp_buf jbuf; |
16 | |
17 | __attribute__((noinline)) bool jump() { |
18 | // Fool the compiler so it cannot deduce noreturn. |
19 | if (getpid() != 0) { |
20 | longjmp(env: jbuf, val: 1); |
21 | return true; |
22 | } |
23 | return false; |
24 | } |
25 | |
26 | bool target() { |
27 | switch (setjmp(jbuf)) { |
28 | case 1: |
29 | return false; |
30 | default: |
31 | break; |
32 | } |
33 | |
34 | while (true) { |
35 | char buf[4096]; |
36 | stackbuf = buf; |
37 | if (!jump()) { |
38 | break; |
39 | }; |
40 | } |
41 | return true; |
42 | } |
43 | |
44 | int main() { |
45 | target(); |
46 | |
47 | void *untagged = __hwasan_tag_pointer(p: stackbuf, tag: 0); |
48 | if (stackbuf == untagged) { |
49 | // The buffer wasn't tagged in the first place, so the test will not work |
50 | // as expected. |
51 | return 2; |
52 | } |
53 | if (__hwasan_test_shadow(x: untagged, size: 4096) != -1) { |
54 | return 1; |
55 | } |
56 | |
57 | return 0; |
58 | } |
59 | |