1*bcaeed49SFangrui Song // RUN: %clangxx_tsan -O1 --std=c++11 %s -o %t && %run %t 2>&1 | FileCheck %s
2*bcaeed49SFangrui Song #include "custom_mutex.h"
3*bcaeed49SFangrui Song 
4*bcaeed49SFangrui Song #include <type_traits>
5*bcaeed49SFangrui Song 
6*bcaeed49SFangrui Song // Test that the destruction events of a mutex are ignored when the
7*bcaeed49SFangrui Song // annotations request this.
8*bcaeed49SFangrui Song //
9*bcaeed49SFangrui Song // Use after destruction is UB, but __tsan_mutex_linker_init and
10*bcaeed49SFangrui Song // __tsan_mutex_not_static exist to support global variables of mutex type,
11*bcaeed49SFangrui Song // which might be accessed during program shutdown after the class's destructor
12*bcaeed49SFangrui Song // has run.
13*bcaeed49SFangrui Song 
main()14*bcaeed49SFangrui Song int main() {
15*bcaeed49SFangrui Song   std::aligned_storage<sizeof(Mutex), alignof(Mutex)>::type mu1_store;
16*bcaeed49SFangrui Song   Mutex* mu1 = reinterpret_cast<Mutex*>(&mu1_store);
17*bcaeed49SFangrui Song   new(&mu1_store) Mutex(false, __tsan_mutex_linker_init);
18*bcaeed49SFangrui Song   mu1->Lock();
19*bcaeed49SFangrui Song   mu1->~Mutex();
20*bcaeed49SFangrui Song   mu1->Unlock();
21*bcaeed49SFangrui Song 
22*bcaeed49SFangrui Song   std::aligned_storage<sizeof(Mutex), alignof(Mutex)>::type mu2_store;
23*bcaeed49SFangrui Song   Mutex* mu2 = reinterpret_cast<Mutex*>(&mu2_store);
24*bcaeed49SFangrui Song   new(&mu2_store) Mutex(false, 0, __tsan_mutex_not_static);
25*bcaeed49SFangrui Song   mu2->Lock();
26*bcaeed49SFangrui Song   mu2->~Mutex();
27*bcaeed49SFangrui Song   mu2->Unlock();
28*bcaeed49SFangrui Song 
29*bcaeed49SFangrui Song   fprintf(stderr, "DONE\n");
30*bcaeed49SFangrui Song   return 0;
31*bcaeed49SFangrui Song }
32*bcaeed49SFangrui Song 
33*bcaeed49SFangrui Song // CHECK: DONE
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