src/compiler-rt/test/tsan/libcxx/std_shared_ptr.cc

   1 // RUN: %clangxx_tsan -O1 %s -o %t && %run %t 2>&1 | FileCheck %s
   2 #include <stdio.h>
   3 #include <memory>
   4 #include <thread>
   5
   6 int main() {
   7   int v1 = 0;
   8   int v2 = 0;
   9   std::thread t1;
  10   std::thread t2;
  11
  12   {
  13      auto thingy = std::make_shared<int>(42);
  14      t1 = std::thread([thingy, &v1] { v1 = *thingy; });
  15      t2 = std::thread([thingy, &v2] { v2 = *thingy; });
  16   }
  17
  18   t1.join();
  19   t2.join();
  20   printf("%d %d\n", v1, v2);
  21   // CHECK-NOT: ThreadSanitizer: data race
  22   // CHECK: 42 42
  23   return 0;
  24 }