1 // RUN: %clangxx_tsan -O1 %s -o %t && %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 *(int*)varaddr = 42;
11 int rec = __tsan_java_mutex_unlock_rec(lockaddr);
12 if (rec != 2) {
13 fprintf(stderr, "FAILED 0 rec=%d\n", rec);
14 exit(1);
15 }
16 barrier_wait(&barrier);
17 barrier_wait(&barrier);
18 __tsan_java_mutex_lock_rec(lockaddr, rec);
19 if (*(int*)varaddr != 43) {
20 fprintf(stderr, "FAILED 3 var=%d\n", *(int*)varaddr);
21 exit(1);
22 }
23 __tsan_java_mutex_unlock(lockaddr);
24 __tsan_java_mutex_unlock(lockaddr);
25 return 0;
26 }
27
main()28 int main() {
29 barrier_init(&barrier, 2);
30 int const kHeapSize = 1024 * 1024;
31 jptr jheap = (jptr)malloc(kHeapSize + 8) + 8;
32 __tsan_java_init(jheap, kHeapSize);
33 const int kBlockSize = 16;
34 __tsan_java_alloc(jheap, kBlockSize);
35 varaddr = jheap;
36 *(int*)varaddr = 0;
37 lockaddr = jheap + 8;
38 pthread_t th;
39 pthread_create(&th, 0, Thread, 0);
40 barrier_wait(&barrier);
41 __tsan_java_mutex_lock(lockaddr);
42 if (*(int*)varaddr != 42) {
43 fprintf(stderr, "FAILED 1 var=%d\n", *(int*)varaddr);
44 exit(1);
45 }
46 *(int*)varaddr = 43;
47 __tsan_java_mutex_unlock(lockaddr);
48 barrier_wait(&barrier);
49 pthread_join(th, 0);
50 __tsan_java_free(jheap, kBlockSize);
51 fprintf(stderr, "DONE\n");
52 return __tsan_java_fini();
53 }
54
55 // CHECK-NOT: WARNING: ThreadSanitizer: data race
56 // CHECK-NOT: FAILED
57 // CHECK: DONE
58