1 // RUN: %clangxx_tsan -O1 %s -o %t && %deflake %run %t | FileCheck %s 2 #include <pthread.h> 3 #include <stdio.h> 4 #include <unistd.h> 5 6 int Global; 7 pthread_mutex_t mtx; 8 9 void *Thread1(void *x) { 10 sleep(1); 11 pthread_mutex_lock(&mtx); 12 Global++; 13 pthread_mutex_unlock(&mtx); 14 return NULL; 15 } 16 17 void *Thread2(void *x) { 18 Global--; 19 return NULL; 20 } 21 22 int main() { 23 // CHECK: WARNING: ThreadSanitizer: data race 24 // CHECK: Write of size 4 at {{.*}} by thread T1 25 // CHECK: (mutexes: write [[M1:M[0-9]+]]): 26 // CHECK: Previous write of size 4 at {{.*}} by thread T2: 27 // CHECK: Mutex [[M1]] (0x{{.*}}) created at: 28 // CHECK: #0 pthread_mutex_init 29 // CHECK: #1 main {{.*}}/mutexset1.cc:[[@LINE+1]] 30 pthread_mutex_init(&mtx, 0); 31 pthread_t t[2]; 32 pthread_create(&t[0], NULL, Thread1, NULL); 33 pthread_create(&t[1], NULL, Thread2, NULL); 34 pthread_join(t[0], NULL); 35 pthread_join(t[1], NULL); 36 pthread_mutex_destroy(&mtx); 37 } 38
