src/compiler-rt/test/tsan/Darwin/osatomics-add.mm

   1 // RUN: %clangxx_tsan %s -o %t -framework Foundation -std=c++11
   2 // RUN: %run %t 2>&1 | FileCheck %s
   3
   4 #import <Foundation/Foundation.h>
   5 #import <libkern/OSAtomic.h>
   6
   7 #include <thread>
   8
   9 volatile int64_t retainCount = 0;
  10
  11 long g = 0;
  12
  13 void dealloc() {
  14   g = 42;
  15 }
  16
  17 void release() {
  18   if (OSAtomicAdd64Barrier(-1, &retainCount) == 0) {
  19     dealloc();
  20   }
  21 }
  22
  23 void retain() {
  24   OSAtomicAdd64Barrier(1, &retainCount);
  25 }
  26
  27 int main(int argc, const char * argv[]) {
  28   fprintf(stderr, "start\n");
  29   retain();
  30   retain();
  31
  32   std::thread t([]{
  33     release();
  34   });
  35
  36   g = 47;
  37
  38   release();
  39   t.join();
  40
  41   fprintf(stderr, "end, g = %ld\n", g);
  42
  43   return 0;
  44 }
  45
  46 // CHECK: start
  47 // CHECK: end, g = 42
  48 // CHECK-NOT: WARNING: ThreadSanitizer