forked from OSchip/llvm-project
38 lines
945 B
C++
38 lines
945 B
C++
// 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 mtx;
|
|
|
|
void *Thread1(void *x) {
|
|
sleep(1);
|
|
pthread_mutex_lock(&mtx);
|
|
Global++;
|
|
pthread_mutex_unlock(&mtx);
|
|
return NULL;
|
|
}
|
|
|
|
void *Thread2(void *x) {
|
|
Global--;
|
|
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: Mutex [[M1]] created at:
|
|
// CHECK: #0 pthread_mutex_init
|
|
// CHECK: #1 main {{.*}}/mutexset1.cc:[[@LINE+1]]
|
|
pthread_mutex_init(&mtx, 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(&mtx);
|
|
}
|