compiler-rt/test/tsan/custom_mutex4.cpp

   1 // RUN: %clangxx_tsan -O1 --std=c++11 %s -o %t && %run %t 2>&1 | FileCheck %s
   2 #include "custom_mutex.h"
   3
   4 #include <type_traits>
   5
   6 // Test that the destruction events of a mutex are ignored when the
   7 // annotations request this.
   8 //
   9 // Use after destruction is UB, but __tsan_mutex_linker_init and
  10 // __tsan_mutex_not_static exist to support global variables of mutex type,
  11 // which might be accessed during program shutdown after the class's destructor
  12 // has run.
  13
  14 int main() {
  15   std::aligned_storage<sizeof(Mutex), alignof(Mutex)>::type mu1_store;
  16   Mutex* mu1 = reinterpret_cast<Mutex*>(&mu1_store);
  17   new(&mu1_store) Mutex(false, __tsan_mutex_linker_init);
  18   mu1->Lock();
  19   mu1->~Mutex();
  20   mu1->Unlock();
  21
  22   std::aligned_storage<sizeof(Mutex), alignof(Mutex)>::type mu2_store;
  23   Mutex* mu2 = reinterpret_cast<Mutex*>(&mu2_store);
  24   new(&mu2_store) Mutex(false, 0, __tsan_mutex_not_static);
  25   mu2->Lock();
  26   mu2->~Mutex();
  27   mu2->Unlock();
  28
  29   fprintf(stderr, "DONE\n");
  30   return 0;
  31 }
  32
  33 // CHECK: DONE