compiler-rt/test/tsan/java_lock.cpp

   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