text: // RUN: %clangxx_tsan -O1 %s -o %t && %run %t 2>&1 | FileCheck %s
  #include "java.h"
  #include <unistd.h>
  
  jptr varaddr;
  jptr lockaddr;
  
  void *Thread(void *p) {
    sleep(1);
    __tsan_java_mutex_read_lock(lockaddr);
    *(int*)varaddr = 42;
    __tsan_java_mutex_read_unlock(lockaddr);
    return 0;
  }
  
  int main() {
    int const kHeapSize = 1024 * 1024;
    void *jheap = malloc(kHeapSize);
    __tsan_java_init((jptr)jheap, kHeapSize);
    const int kBlockSize = 16;
    __tsan_java_alloc((jptr)jheap, kBlockSize);
    varaddr = (jptr)jheap;
    lockaddr = (jptr)jheap + 8;
    pthread_t th;
    pthread_create(&th, 0, Thread, 0);
    __tsan_java_mutex_lock(lockaddr);
    *(int*)varaddr = 43;
    __tsan_java_mutex_unlock(lockaddr);
    pthread_join(th, 0);
    __tsan_java_free((jptr)jheap, kBlockSize);
    printf("OK\n");
    return __tsan_java_fini();
  }
  
  // CHECK-NOT: WARNING: ThreadSanitizer: data race
  