| 1 | #include "attach.h" |
|---|---|
| 2 | #include "pseudo_barrier.h" |
| 3 | #include <chrono> |
| 4 | #include <cstdio> |
| 5 | #include <fcntl.h> |
| 6 | #include <fstream> |
| 7 | #include <thread> |
| 8 | #include <vector> |
| 9 | |
| 10 | pseudo_barrier_t barrier; |
| 11 | |
| 12 | constexpr size_t nthreads = 5; |
| 13 | volatile bool wait_for_debugger_flag = true; |
| 14 | |
| 15 | void break_here() {} |
| 16 | |
| 17 | void tfunc() { |
| 18 | pseudo_barrier_wait(barrier); |
| 19 | |
| 20 | break_here(); |
| 21 | } |
| 22 | |
| 23 | int main(int argc, char const *argv[]) { |
| 24 | lldb_enable_attach(); |
| 25 | |
| 26 | if (argc < 3) |
| 27 | return 1; |
| 28 | |
| 29 | // Create a file to signal that this process has started up. |
| 30 | std::ofstream(argv[1]).close(); |
| 31 | |
| 32 | // And wait for it to attach. |
| 33 | for (int i = 0; i < 100 && wait_for_debugger_flag; ++i) |
| 34 | std::this_thread::sleep_for(rtime: std::chrono::seconds(1)); |
| 35 | |
| 36 | // Fire up the threads and have them call break_here() simultaneously. |
| 37 | pseudo_barrier_init(barrier, nthreads); |
| 38 | std::vector<std::thread> threads; |
| 39 | for (size_t i = 0; i < nthreads; ++i) |
| 40 | threads.emplace_back(args&: tfunc); |
| 41 | |
| 42 | for (std::thread &t : threads) |
| 43 | t.join(); |
| 44 | |
| 45 | // Create the file to let the debugger know we're running. |
| 46 | std::ofstream(argv[2]).close(); |
| 47 | |
| 48 | return 0; |
| 49 | } |
| 50 |