| 1 | // RUN: %clang_tsan -O1 %s -o %t && %deflake %run %t 2>&1 | FileCheck %s |
|---|---|
| 2 | |
| 3 | #include <pthread.h> |
| 4 | #include <stdio.h> |
| 5 | #include <stdlib.h> |
| 6 | #include <setjmp.h> |
| 7 | #include <string.h> |
| 8 | |
| 9 | void bar(jmp_buf env) { |
| 10 | volatile int x = 42; |
| 11 | jmp_buf env2; |
| 12 | memcpy(dest: env2, src: env, n: sizeof(jmp_buf)); |
| 13 | longjmp(env: env2, val: 42); |
| 14 | x++; |
| 15 | } |
| 16 | |
| 17 | void foo(jmp_buf env) { |
| 18 | volatile int x = 42; |
| 19 | bar(env); |
| 20 | x++; |
| 21 | } |
| 22 | |
| 23 | __attribute__((noinline)) void badguy() { |
| 24 | pthread_mutex_t mtx; |
| 25 | pthread_mutex_init(mutex: &mtx, mutexattr: 0); |
| 26 | pthread_mutex_lock(mutex: &mtx); |
| 27 | pthread_mutex_destroy(mutex: &mtx); |
| 28 | } |
| 29 | |
| 30 | __attribute__((noinline)) void mymain() { |
| 31 | jmp_buf env; |
| 32 | if (setjmp(env) == 42) { |
| 33 | badguy(); |
| 34 | return; |
| 35 | } |
| 36 | foo(env); |
| 37 | fprintf(stderr, format: "FAILED\n"); |
| 38 | } |
| 39 | |
| 40 | int main() { |
| 41 | volatile int x = 42; |
| 42 | mymain(); |
| 43 | return x; |
| 44 | } |
| 45 | |
| 46 | // CHECK-NOT: FAILED |
| 47 | // CHECK: WARNING: ThreadSanitizer: destroy of a locked mutex |
| 48 | // CHECK: #0 pthread_mutex_destroy |
| 49 | // CHECK: #1 badguy |
| 50 | // CHECK: #2 mymain |
| 51 | // CHECK: #3 main |
| 52 | |
| 53 |