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  
 7  void *Thread(void *p) {
 8    barrier_wait(&barrier);
 9    __tsan_java_mutex_lock(lockaddr);
10    *(int*)varaddr = 42;
11    __tsan_java_mutex_unlock(lockaddr);
12    return 0;
13  }
14  
15  int main() {
16    barrier_init(&barrier, 2);
17    int const kHeapSize = 1024 * 1024;
18    jptr jheap = (jptr)malloc(kHeapSize + 8) + 8;
19    __tsan_java_init(jheap, kHeapSize);
20    const int kBlockSize = 16;
21    __tsan_java_alloc(jheap, kBlockSize);
22    varaddr = jheap;
23    lockaddr = jheap + 8;
24    pthread_t th;
25    pthread_create(&th, 0, Thread, 0);
26    __tsan_java_mutex_lock(lockaddr);
27    *(int*)varaddr = 43;
28    __tsan_java_mutex_unlock(lockaddr);
29    barrier_wait(&barrier);
30    pthread_join(th, 0);
31    __tsan_java_free(jheap, kBlockSize);
32    fprintf(stderr, "DONE\n");
33    return __tsan_java_fini();
34  }
35  
36  // CHECK-NOT: WARNING: ThreadSanitizer: data race
37  // CHECK: DONE