compiler-rt/test/tsan/java_race.cpp

   1 // RUN: %clangxx_tsan -O1 %s -o %t && %deflake %run %t | FileCheck %s
   2 #include "java.h"
   3
   4 void *Thread(void *p) {
   5   barrier_wait(&barrier);
   6   *(int*)p = 42;
   7   return 0;
   8 }
   9
  10 int main() {
  11   barrier_init(&barrier, 2);
  12   int const kHeapSize = 1024 * 1024;
  13   jptr jheap = (jptr)malloc(kHeapSize + 8) + 8;
  14   __tsan_java_init(jheap, kHeapSize);
  15   const int kBlockSize = 16;
  16   __tsan_java_alloc(jheap, kBlockSize);
  17   pthread_t th;
  18   pthread_create(&th, 0, Thread, (void*)jheap);
  19   *(int*)jheap = 43;
  20   barrier_wait(&barrier);
  21   pthread_join(th, 0);
  22   __tsan_java_free(jheap, kBlockSize);
  23   fprintf(stderr, "DONE\n");
  24   return __tsan_java_fini();
  25 }
  26
  27 // CHECK: WARNING: ThreadSanitizer: data race
  28 // CHECK: DONE