54 lines · cpp
1// RUN: %clangxx_tsan -O1 %s -o %t && %deflake %run %t | FileCheck %s2#include "test.h"3 4int Global;5pthread_mutex_t mtx1;6pthread_mutex_t mtx2;7pthread_rwlock_t mtx3;8 9void *Thread1(void *x) {10 barrier_wait(&barrier);11 pthread_mutex_lock(&mtx1);12 Global++;13 pthread_mutex_unlock(&mtx1);14 return NULL;15}16 17void *Thread2(void *x) {18 pthread_mutex_lock(&mtx1);19 pthread_mutex_unlock(&mtx1);20 pthread_mutex_lock(&mtx2);21 pthread_rwlock_rdlock(&mtx3);22 Global--;23 pthread_mutex_unlock(&mtx2);24 pthread_rwlock_unlock(&mtx3);25 barrier_wait(&barrier);26 return NULL;27}28 29int main() {30 barrier_init(&barrier, 2);31 // CHECK: WARNING: ThreadSanitizer: data race32 // CHECK: Write of size 4 at {{.*}} by thread T133 // CHECK: (mutexes: write [[M1:M[0-9]+]]):34 // CHECK: Previous write of size 4 at {{.*}} by thread T235 // CHECK: (mutexes: write [[M2:M[0-9]+]], read [[M3:M[0-9]+]]):36 // CHECK: Mutex [[M1]] (0x{{.*}}) created at:37 // CHECK: #1 main {{.*}}mutexset6.cpp:[[@LINE+5]]38 // CHECK: Mutex [[M2]] (0x{{.*}}) created at:39 // CHECK: #1 main {{.*}}mutexset6.cpp:[[@LINE+4]]40 // CHECK: Mutex [[M3]] (0x{{.*}}) created at:41 // CHECK: #1 main {{.*}}mutexset6.cpp:[[@LINE+3]]42 pthread_mutex_init(&mtx1, 0);43 pthread_mutex_init(&mtx2, 0);44 pthread_rwlock_init(&mtx3, 0);45 pthread_t t[2];46 pthread_create(&t[0], NULL, Thread1, NULL);47 pthread_create(&t[1], NULL, Thread2, NULL);48 pthread_join(t[0], NULL);49 pthread_join(t[1], NULL);50 pthread_mutex_destroy(&mtx1);51 pthread_mutex_destroy(&mtx2);52 pthread_rwlock_destroy(&mtx3);53}54