| 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 | |