1// RUN: %clangxx_tsan -O1 --std=c++17 %s -o %t && %run %t 2>&1 | FileCheck %s
2#include "custom_mutex.h"
3
4#include <cstddef>
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
14int main() {
15 alignas(Mutex) std::byte mu1_store[sizeof(Mutex)];
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 alignas(Mutex) std::byte mu2_store[sizeof(Mutex)];
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, format: "DONE\n");
30 return 0;
31}
32
33// CHECK: DONE
34

source code of compiler-rt/test/tsan/custom_mutex4.cpp