1 // RUN: %clangxx_tsan -O1 %s -o %t && %deflake %run %t 2>&1 | FileCheck %s
2 #include "java.h"
3
4 jptr varaddr;
5 jptr lockaddr;
6
Thread(void * p)7 void *Thread(void *p) {
8 __tsan_java_mutex_lock(lockaddr);
9 __tsan_java_mutex_lock(lockaddr);
10 __tsan_java_mutex_lock(lockaddr);
11 int rec = __tsan_java_mutex_unlock_rec(lockaddr);
12 if (rec != 3) {
13 fprintf(stderr, "FAILED 0 rec=%d\n", rec);
14 exit(1);
15 }
16 *(int*)varaddr = 42;
17 barrier_wait(&barrier);
18 barrier_wait(&barrier);
19 __tsan_java_mutex_lock_rec(lockaddr, rec);
20 __tsan_java_mutex_unlock(lockaddr);
21 __tsan_java_mutex_unlock(lockaddr);
22 __tsan_java_mutex_unlock(lockaddr);
23 return 0;
24 }
25
main()26 int main() {
27 barrier_init(&barrier, 2);
28 int const kHeapSize = 1024 * 1024;
29 jptr jheap = (jptr)malloc(kHeapSize + 8) + 8;
30 __tsan_java_init(jheap, kHeapSize);
31 const int kBlockSize = 16;
32 __tsan_java_alloc(jheap, kBlockSize);
33 varaddr = jheap;
34 *(int*)varaddr = 0;
35 lockaddr = jheap + 8;
36 pthread_t th;
37 pthread_create(&th, 0, Thread, 0);
38 barrier_wait(&barrier);
39 __tsan_java_mutex_lock(lockaddr);
40 *(int*)varaddr = 43;
41 __tsan_java_mutex_unlock(lockaddr);
42 barrier_wait(&barrier);
43 pthread_join(th, 0);
44 __tsan_java_free(jheap, kBlockSize);
45 fprintf(stderr, "DONE\n");
46 return __tsan_java_fini();
47 }
48
49 // CHECK: WARNING: ThreadSanitizer: data race
50 // CHECK-NOT: FAILED
51 // CHECK: DONE
52