| // RUN: %clang_tsan -O1 %s -o %t && %deflake %run %t | FileCheck %s |
| // This test fails on powerpc64 (VMA=46). |
| // The size of the write reported by Tsan for T1 is 8 instead of 1. |
| // XFAIL: powerpc64 |
| #include "test.h" |
| |
| pthread_mutex_t Mtx; |
| int Global; |
| |
| void *Thread1(void *x) { |
| pthread_mutex_init(&Mtx, 0); |
| pthread_mutex_lock(&Mtx); |
| Global = 42; |
| pthread_mutex_unlock(&Mtx); |
| barrier_wait(&barrier); |
| return NULL; |
| } |
| |
| void *Thread2(void *x) { |
| barrier_wait(&barrier); |
| pthread_mutex_lock(&Mtx); |
| Global = 43; |
| pthread_mutex_unlock(&Mtx); |
| return NULL; |
| } |
| |
| int main() { |
| barrier_init(&barrier, 2); |
| pthread_t t[2]; |
| pthread_create(&t[0], NULL, Thread1, NULL); |
| pthread_create(&t[1], NULL, Thread2, NULL); |
| pthread_join(t[0], NULL); |
| pthread_join(t[1], NULL); |
| pthread_mutex_destroy(&Mtx); |
| return 0; |
| } |
| |
| // CHECK: WARNING: ThreadSanitizer: data race |
| // CHECK-NEXT: Atomic read of size 1 at {{.*}} by thread T2: |
| // CHECK-NEXT: #0 pthread_mutex_lock |
| // CHECK-NEXT: #1 Thread2{{.*}} {{.*}}race_on_mutex.c:21{{(:3)?}} ({{.*}}) |
| // CHECK: Previous write of size 1 at {{.*}} by thread T1: |
| // CHECK-NEXT: #0 pthread_mutex_init {{.*}} ({{.*}}) |
| // CHECK-NEXT: #1 Thread1{{.*}} {{.*}}race_on_mutex.c:11{{(:3)?}} ({{.*}}) |