compiler-rt/test/tsan/java_race_move.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 varaddr2;
   6
   7 void *Thread(void *p) {
   8   barrier_wait(&barrier);
   9   *(int*)varaddr2 = 42;
  10   return 0;
  11 }
  12
  13 int main() {
  14   barrier_init(&barrier, 2);
  15   int const kHeapSize = 1024 * 1024;
  16   jptr jheap = (jptr)malloc(kHeapSize + 8) + 8;
  17   __tsan_java_init(jheap, kHeapSize);
  18   const int kBlockSize = 64;
  19   int const kMove = 1024;
  20   __tsan_java_alloc(jheap, kBlockSize);
  21   varaddr = jheap + 16;
  22   varaddr2 = varaddr + kMove;
  23   pthread_t th;
  24   pthread_create(&th, 0, Thread, 0);
  25   *(int*)varaddr = 43;
  26   __tsan_java_move(varaddr, varaddr2, kBlockSize);
  27   barrier_wait(&barrier);
  28   pthread_join(th, 0);
  29   __tsan_java_free(varaddr2, kBlockSize);
  30   fprintf(stderr, "DONE\n");
  31   return __tsan_java_fini();
  32 }
  33
  34 // Note: there is a race on the moved object (which we used to detect),
  35 // but now __tsan_java_move resets the object shadow, so we don't detect it anymore.
  36 // CHECK-NOT: WARNING: ThreadSanitizer: data race
  37 // CHECK: DONE