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// RUN: %clangxx_tsan -O1 %s -o %t && %t 2>&1 | FileCheck %s
#include <pthread.h>
#include <stdio.h>
#include <unistd.h>
int Global;
pthread_mutex_t mtx1;
pthread_spinlock_t mtx2;
pthread_rwlock_t mtx3;
void *Thread1(void *x) {
sleep(1);
pthread_mutex_lock(&mtx1);
Global++;
pthread_mutex_unlock(&mtx1);
return NULL;
}
void *Thread2(void *x) {
pthread_mutex_lock(&mtx1);
pthread_mutex_unlock(&mtx1);
pthread_spin_lock(&mtx2);
pthread_rwlock_rdlock(&mtx3);
Global--;
pthread_spin_unlock(&mtx2);
pthread_rwlock_unlock(&mtx3);
return NULL;
}
int main() {
// CHECK: WARNING: ThreadSanitizer: data race
// CHECK: Write of size 4 at {{.*}} by thread T1
// CHECK: (mutexes: write [[M1:M[0-9]+]]):
// CHECK: Previous write of size 4 at {{.*}} by thread T2
// CHECK: (mutexes: write [[M2:M[0-9]+]], read [[M3:M[0-9]+]]):
// CHECK: Mutex [[M1]] created at:
// CHECK: #1 main {{.*}}/mutexset6.cc:[[@LINE+5]]
// CHECK: Mutex [[M2]] created at:
// CHECK: #1 main {{.*}}/mutexset6.cc:[[@LINE+4]]
// CHECK: Mutex [[M3]] created at:
// CHECK: #1 main {{.*}}/mutexset6.cc:[[@LINE+3]]
pthread_mutex_init(&mtx1, 0);
pthread_spin_init(&mtx2, 0);
pthread_rwlock_init(&mtx3, 0);
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(&mtx1);
pthread_spin_destroy(&mtx2);
pthread_rwlock_destroy(&mtx3);
}
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