44 lines · cpp
1// RUN: %clangxx_tsan %s %link_libcxx_tsan -o %t2// RUN: %run %t 2>&1 | FileCheck %s --implicit-check-not='ThreadSanitizer'3 4#include <dispatch/dispatch.h>5 6#include <atomic>7#include <cstdio>8#include <memory>9 10std::atomic<long> destructor_counter(0);11 12struct MyStruct {13 virtual ~MyStruct() {14 usleep(10000);15 std::atomic_fetch_add_explicit(&destructor_counter, 1, std::memory_order_relaxed);16 }17};18 19int main(int argc, const char *argv[]) {20 std::fprintf(stderr, "Hello world.\n");21 22 dispatch_queue_t q = dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_DEFAULT, 0);23 dispatch_group_t g = dispatch_group_create();24 25 for (int i = 0; i < 100; i++) {26 std::shared_ptr<MyStruct> shared(new MyStruct());27 28 dispatch_group_async(g, q, ^{29 shared.get(); // just to make sure the object is captured by the block30 });31 }32 33 dispatch_group_wait(g, DISPATCH_TIME_FOREVER);34 35 if (destructor_counter != 100) {36 std::abort();37 }38 39 std::fprintf(stderr, "Done.\n");40}41 42// CHECK: Hello world.43// CHECK: Done.44