1// RUN: %clangxx_tsan -O1 %s -o %t && %run %t 2>&1 | FileCheck %s
2#include "java.h"
3
4jptr varaddr;
5jptr lockaddr;
6
7void *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    printf("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    printf("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
28int 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    printf("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  printf("DONE\n");
52  return __tsan_java_fini();
53}
54
55// CHECK-NOT: WARNING: ThreadSanitizer: data race
56// CHECK-NOT: FAILED
57// CHECK: DONE
58