1 /* 2 Copyright (c) 2020-2021 Intel Corporation 3 4 Licensed under the Apache License, Version 2.0 (the "License"); 5 you may not use this file except in compliance with the License. 6 You may obtain a copy of the License at 7 8 http://www.apache.org/licenses/LICENSE-2.0 9 10 Unless required by applicable law or agreed to in writing, software 11 distributed under the License is distributed on an "AS IS" BASIS, 12 WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 See the License for the specific language governing permissions and 14 limitations under the License. 15 */ 16 17 #include "common/config.h" 18 19 #include "tbb/parallel_for.h" 20 #include "tbb/global_control.h" 21 22 #include "common/test.h" 23 #include "common/utils.h" 24 #include "common/utils_concurrency_limit.h" 25 26 #include <atomic> 27 #include <condition_variable> 28 #include <thread> 29 #include <vector> 30 31 //! \file test_eh_thread.cpp 32 //! \brief Test for [internal] functionality 33 34 // On Windows there is no real thread number limit beside available memory. 35 // Therefore, the test for thread limit is unreasonable. 36 // 37 // Under ASAN current approach is not viable as it breaks the ASAN itself as well 38 #if TBB_USE_EXCEPTIONS && !_WIN32 && !__ANDROID__ && !__TBB_TEST_USE_ADDRESS_SANITIZER 39 40 static bool g_exception_caught = false; 41 static std::mutex m; 42 static std::condition_variable cv; 43 static std::atomic<bool> stop{ false }; 44 45 static void* thread_routine(void*) 46 { 47 std::unique_lock<std::mutex> lock(m); 48 cv.wait(lock, [] { return stop == true; }); 49 return 0; 50 } 51 52 class Thread { 53 pthread_t mHandle{}; 54 bool mValid{}; 55 public: 56 Thread() { 57 mValid = false; 58 pthread_attr_t attr; 59 // Limit the stack size not to consume all virtual memory on 32 bit platforms. 60 if (pthread_attr_init(&attr) == 0 && pthread_attr_setstacksize(&attr, 100*1024) == 0) { 61 mValid = pthread_create(&mHandle, &attr, thread_routine, /* arg = */ nullptr) == 0; 62 } 63 } 64 bool isValid() const { return mValid; } 65 void join() { 66 pthread_join(mHandle, nullptr); 67 } 68 }; 69 70 //! Test for exception when too many threads 71 //! \brief \ref resource_usage 72 TEST_CASE("Too many threads") { 73 if (utils::get_platform_max_threads() < 2) { 74 // The test expects that the scheduler will try to create at least one thread. 75 return; 76 } 77 std::thread /* isolate test */ ([] { 78 std::vector<Thread> threads; 79 stop = false; 80 for (;;) { 81 Thread thread; 82 if (!thread.isValid()) { 83 break; 84 } 85 threads.push_back(thread); 86 } 87 g_exception_caught = false; 88 try { 89 // Initialize the library to create worker threads 90 tbb::parallel_for(0, 2, [](int) {}); 91 } catch (const std::exception & e) { 92 g_exception_caught = true; 93 // Do not CHECK to avoid memory allocation (we can be out of memory) 94 if (e.what()== nullptr) { 95 FAIL("Exception does not have description"); 96 } 97 } 98 // Do not CHECK to avoid memory allocation (we can be out of memory) 99 if (!g_exception_caught) { 100 FAIL("No exception was caught"); 101 } 102 stop = true; 103 cv.notify_all(); 104 for (auto& t : threads) { 105 t.join(); 106 } 107 }).join(); 108 } 109 #endif 110