| 1 | // RUN: %clangxx_tsan -O1 %s -o %t && %deflake %run %t | FileCheck %s |
|---|---|
| 2 | #include <pthread.h> |
| 3 | #include <stdlib.h> |
| 4 | #include <stdio.h> |
| 5 | #include <unistd.h> |
| 6 | #include <errno.h> |
| 7 | |
| 8 | pthread_mutex_t m; |
| 9 | int x; |
| 10 | |
| 11 | void *thr(void *p) { |
| 12 | pthread_mutex_lock(mutex: &m); |
| 13 | x = 42; |
| 14 | return 0; |
| 15 | } |
| 16 | |
| 17 | int main() { |
| 18 | pthread_mutexattr_t a; |
| 19 | pthread_mutexattr_init(attr: &a); |
| 20 | pthread_mutexattr_setrobust(attr: &a, robustness: PTHREAD_MUTEX_ROBUST); |
| 21 | pthread_mutex_init(mutex: &m, mutexattr: &a); |
| 22 | pthread_t th; |
| 23 | pthread_create(newthread: &th, attr: 0, start_routine: thr, arg: 0); |
| 24 | sleep(seconds: 1); |
| 25 | if (pthread_mutex_trylock(mutex: &m) != EOWNERDEAD) { |
| 26 | fprintf(stderr, format: "not EOWNERDEAD\n"); |
| 27 | exit(status: 1); |
| 28 | } |
| 29 | x = 43; |
| 30 | pthread_join(th: th, thread_return: 0); |
| 31 | fprintf(stderr, format: "DONE\n"); |
| 32 | } |
| 33 | |
| 34 | // This is a false positive, tsan must not bark at the data race. |
| 35 | // But currently it does. |
| 36 | // CHECK-NOT: WARNING: ThreadSanitizer WARNING: double lock of mutex |
| 37 | // CHECK: WARNING: ThreadSanitizer: data race |
| 38 | // CHECK-NOT: EOWNERDEAD |
| 39 | // CHECK: DONE |
| 40 | // CHECK-NOT: WARNING: ThreadSanitizer |
| 41 | |
| 42 |