| 1 | #include <condition_variable> |
|---|---|
| 2 | #include <iostream> |
| 3 | #include <mutex> |
| 4 | #include <thread> |
| 5 | |
| 6 | std::mutex mtx; |
| 7 | std::condition_variable cv; |
| 8 | int ready_thread_id = 0; |
| 9 | int signal_main_thread = 0; |
| 10 | |
| 11 | void worker(int id) { |
| 12 | std::cout << "Worker "<< id << " executing..."<< std::endl; |
| 13 | |
| 14 | // lldb test should change signal_main_thread to true to break the loop. |
| 15 | while (!signal_main_thread) { |
| 16 | std::this_thread::sleep_for(rtime: std::chrono::milliseconds(10)); |
| 17 | } |
| 18 | |
| 19 | // Signal the main thread to continue main thread |
| 20 | { |
| 21 | std::lock_guard<std::mutex> lock(mtx); |
| 22 | ready_thread_id = id; // break worker thread here |
| 23 | } |
| 24 | cv.notify_one(); |
| 25 | |
| 26 | std::this_thread::sleep_for(rtime: std::chrono::seconds(1)); |
| 27 | std::cout << "Worker "<< id << " finished."<< std::endl; |
| 28 | } |
| 29 | |
| 30 | void deadlock_func(std::unique_lock<std::mutex> &lock) { |
| 31 | int i = 10; |
| 32 | ++i; // Set interrupt breakpoint here |
| 33 | printf(format: "%d", i); // Finish step-over from inner breakpoint |
| 34 | auto func = [] { return ready_thread_id == 1; }; |
| 35 | cv.wait(lock&: lock, p: func); |
| 36 | } |
| 37 | |
| 38 | int simulate_thread() { |
| 39 | std::thread t1(worker, 1); |
| 40 | |
| 41 | std::unique_lock<std::mutex> lock(mtx); |
| 42 | deadlock_func(lock); // Set breakpoint1 here |
| 43 | |
| 44 | std::thread t2(worker, 2); // Finish step-over from breakpoint1 |
| 45 | |
| 46 | cv.wait(lock&: lock, p: [] { return ready_thread_id == 2; }); |
| 47 | |
| 48 | t1.join(); |
| 49 | t2.join(); |
| 50 | |
| 51 | std::cout << "Main thread continues..."<< std::endl; |
| 52 | |
| 53 | return 0; |
| 54 | } |
| 55 | |
| 56 | int bar() { return 54; } |
| 57 | |
| 58 | int foo(const std::string p1, int extra) { return p1.size() + extra; } |
| 59 | |
| 60 | int main(int argc, char *argv[]) { |
| 61 | std::string ss = "this is a string for testing", |
| 62 | ls = "this is a long string for testing"; |
| 63 | foo(p1: ss.size() % 2 == 0 ? ss : ls, extra: bar()); // Set breakpoint2 here |
| 64 | |
| 65 | simulate_thread(); // Finish step-over from breakpoint2 |
| 66 | |
| 67 | return 0; |
| 68 | } |
| 69 |