1// RUN: %clangxx_tsan -O1 %s -o %t && %deflake %run %t | FileCheck %s
2#include "test.h"
3
4int Global;
5pthread_mutex_t mtx1;
6pthread_mutex_t mtx2;
7
8void *Thread1(void *x) {
9 pthread_mutex_lock(mutex: &mtx1);
10 pthread_mutex_lock(mutex: &mtx2);
11 Global++;
12 pthread_mutex_unlock(mutex: &mtx2);
13 pthread_mutex_unlock(mutex: &mtx1);
14 barrier_wait(barrier: &barrier);
15 return NULL;
16}
17
18void *Thread2(void *x) {
19 barrier_wait(barrier: &barrier);
20 Global--;
21 return NULL;
22}
23
24int main() {
25 barrier_init(barrier: &barrier, count: 2);
26 // CHECK: WARNING: ThreadSanitizer: data race
27 // CHECK: Write of size 4 at {{.*}} by thread T2:
28 // CHECK: Previous write of size 4 at {{.*}} by thread T1
29 // CHECK: (mutexes: write [[M1:M[0-9]+]], write [[M2:M[0-9]+]]):
30 // CHECK: Mutex [[M1]] (0x{{.*}}) created at:
31 // CHECK: #0 pthread_mutex_init
32 // CHECK: #1 main {{.*}}mutexset4.cpp:[[@LINE+4]]
33 // CHECK: Mutex [[M2]] (0x{{.*}}) created at:
34 // CHECK: #0 pthread_mutex_init
35 // CHECK: #1 main {{.*}}mutexset4.cpp:[[@LINE+2]]
36 pthread_mutex_init(mutex: &mtx1, mutexattr: 0);
37 pthread_mutex_init(mutex: &mtx2, mutexattr: 0);
38 pthread_t t[2];
39 pthread_create(newthread: &t[0], NULL, start_routine: Thread1, NULL);
40 pthread_create(newthread: &t[1], NULL, start_routine: Thread2, NULL);
41 pthread_join(th: t[0], NULL);
42 pthread_join(th: t[1], NULL);
43 pthread_mutex_destroy(mutex: &mtx1);
44 pthread_mutex_destroy(mutex: &mtx2);
45}
46

source code of compiler-rt/test/tsan/mutexset4.cpp