1 #include "pseudo_barrier.h" 2 #include <chrono> 3 #include <fcntl.h> 4 #include <fstream> 5 #include <stdio.h> 6 #include <thread> 7 #include <vector> 8 9 pseudo_barrier_t barrier; 10 11 constexpr size_t nthreads = 5; 12 volatile bool wait_for_debugger_flag = true; 13 break_here()14void break_here() {} 15 tfunc()16void tfunc() { 17 pseudo_barrier_wait(barrier); 18 19 break_here(); 20 } 21 main(int argc,char const * argv[])22int main(int argc, char const *argv[]) { 23 lldb_enable_attach(); 24 25 if (argc < 3) 26 return 1; 27 28 // Create a file to signal that this process has started up. 29 std::ofstream(argv[1]).close(); 30 31 // And wait for it to attach. 32 for (int i = 0; i < 100 && wait_for_debugger_flag; ++i) 33 std::this_thread::sleep_for(std::chrono::seconds(1)); 34 35 // Fire up the threads and have them call break_here() simultaneously. 36 pseudo_barrier_init(barrier, nthreads); 37 std::vector<std::thread> threads; 38 for (size_t i = 0; i < nthreads; ++i) 39 threads.emplace_back(tfunc); 40 41 for (std::thread &t : threads) 42 t.join(); 43 44 // Create the file to let the debugger know we're running. 45 std::ofstream(argv[2]).close(); 46 47 return 0; 48 } 49