| 1 | // RUN: %clang_tsan -O1 %s -o %t && %deflake %run %t | FileCheck %s |
|---|
| 2 | #include "test.h" |
|---|
| 3 | |
|---|
| 4 | pthread_mutex_t Mtx; |
|---|
| 5 | int Global; |
|---|
| 6 | |
|---|
| 7 | void *Thread2(void *x) { |
|---|
| 8 | barrier_wait(barrier: &barrier); |
|---|
| 9 | // CHECK: WARNING: ThreadSanitizer: data race |
|---|
| 10 | // CHECK-NEXT: Atomic read of size 1 at {{.*}} by thread T2: |
|---|
| 11 | // CHECK-NEXT: #0 pthread_mutex_lock |
|---|
| 12 | // CHECK-NEXT: #1 Thread2{{.*}} {{.*}}race_on_mutex.c:[[@LINE+1]]{{(:3)?}} ({{.*}}) |
|---|
| 13 | pthread_mutex_lock(mutex: &Mtx); |
|---|
| 14 | Global = 43; |
|---|
| 15 | pthread_mutex_unlock(mutex: &Mtx); |
|---|
| 16 | return NULL; |
|---|
| 17 | } |
|---|
| 18 | |
|---|
| 19 | void *Thread1(void *x) { |
|---|
| 20 | // CHECK: Previous write of size {{[0-9]+}} at {{.*}} by thread T1: |
|---|
| 21 | // CHECK: #{{[0-9]+}} {{.*}}pthread_mutex_init {{.*}} ({{.*}}) |
|---|
| 22 | // CHECK-NEXT: #{{[0-9]+}} Thread1{{.*}} {{.*}}race_on_mutex.c:[[@LINE+1]]{{(:3)?}} ({{.*}}) |
|---|
| 23 | pthread_mutex_init(mutex: &Mtx, mutexattr: 0); |
|---|
| 24 | pthread_mutex_lock(mutex: &Mtx); |
|---|
| 25 | Global = 42; |
|---|
| 26 | pthread_mutex_unlock(mutex: &Mtx); |
|---|
| 27 | barrier_wait(barrier: &barrier); |
|---|
| 28 | return NULL; |
|---|
| 29 | } |
|---|
| 30 | |
|---|
| 31 | int main() { |
|---|
| 32 | barrier_init(barrier: &barrier, count: 2); |
|---|
| 33 | pthread_t t[2]; |
|---|
| 34 | pthread_create(newthread: &t[0], NULL, start_routine: Thread1, NULL); |
|---|
| 35 | pthread_create(newthread: &t[1], NULL, start_routine: Thread2, NULL); |
|---|
| 36 | pthread_join(th: t[0], NULL); |
|---|
| 37 | pthread_join(th: t[1], NULL); |
|---|
| 38 | pthread_mutex_destroy(mutex: &Mtx); |
|---|
| 39 | return 0; |
|---|
| 40 | } |
|---|
| 41 | |
|---|
