| /* This testcase is part of GDB, the GNU debugger. |
| |
| Copyright 2014-2024 Free Software Foundation, Inc. |
| |
| This program is free software; you can redistribute it and/or modify |
| it under the terms of the GNU General Public License as published by |
| the Free Software Foundation; either version 3 of the License, or |
| (at your option) any later version. |
| |
| This program is distributed in the hope that it will be useful, |
| but WITHOUT ANY WARRANTY; without even the implied warranty of |
| MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| GNU General Public License for more details. |
| |
| You should have received a copy of the GNU General Public License |
| along with this program. If not, see <http://www.gnu.org/licenses/>. */ |
| |
| #include <pthread.h> |
| #include <signal.h> |
| #include <stdlib.h> |
| #include <unistd.h> |
| |
| /* Used to individually advance each thread to the desired stopping point. */ |
| int ready; |
| |
| sig_atomic_t sigusr1_received; |
| sig_atomic_t sigusr2_received; |
| sig_atomic_t sigabrt_received; |
| |
| /* Number of threads currently running. */ |
| int thread_count; |
| pthread_mutex_t thread_count_mutex; |
| pthread_cond_t thread_count_condvar; |
| |
| static void |
| incr_thread_count (void) |
| { |
| pthread_mutex_lock (&thread_count_mutex); |
| ++thread_count; |
| pthread_cond_signal (&thread_count_condvar); |
| pthread_mutex_unlock (&thread_count_mutex); |
| } |
| |
| static void |
| sigusr1_handler (int sig) |
| { |
| sigusr1_received = 1; |
| } |
| |
| static void |
| sigusr2_handler (int sig) |
| { |
| sigusr2_received = 1; |
| } |
| |
| static void |
| sigabrt_handler (int sig) |
| { |
| sigabrt_received = 1; |
| } |
| |
| static void * |
| sigusr1_thread_function (void *unused) |
| { |
| incr_thread_count (); |
| while (!ready) |
| usleep (100); |
| pthread_kill (pthread_self (), SIGUSR1); |
| } |
| |
| static void * |
| sigusr2_thread_function (void *unused) |
| { |
| incr_thread_count (); |
| while (!ready) |
| usleep (100); |
| /* pthread_kill (pthread_self (), SIGUSR2); - manually injected by gdb */ |
| } |
| |
| /* Wait until all threads are at a point where a backtrace will |
| show the thread entry point function. */ |
| |
| static void |
| wait_all_threads_running (int nr_threads) |
| { |
| pthread_mutex_lock (&thread_count_mutex); |
| |
| while (1) |
| { |
| if (thread_count == nr_threads) |
| { |
| pthread_mutex_unlock (&thread_count_mutex); |
| return; |
| } |
| pthread_cond_wait (&thread_count_condvar, &thread_count_mutex); |
| } |
| } |
| |
| static void |
| all_threads_running (void) |
| { |
| while (!ready) |
| usleep (100); |
| } |
| |
| static void |
| all_threads_done (void) |
| { |
| } |
| |
| int |
| main () |
| { |
| pthread_t sigusr1_thread, sigusr2_thread; |
| |
| /* Protect against running forever. */ |
| alarm (60); |
| |
| signal (SIGUSR1, sigusr1_handler); |
| signal (SIGUSR2, sigusr2_handler); |
| signal (SIGABRT, sigabrt_handler); |
| |
| /* Don't let any thread advance past initialization. */ |
| ready = 0; |
| |
| pthread_mutex_init (&thread_count_mutex, NULL); |
| pthread_cond_init (&thread_count_condvar, NULL); |
| |
| #define NR_THREADS 2 |
| pthread_create (&sigusr1_thread, NULL, sigusr1_thread_function, NULL); |
| pthread_create (&sigusr2_thread, NULL, sigusr2_thread_function, NULL); |
| wait_all_threads_running (NR_THREADS); |
| all_threads_running (); |
| |
| pthread_kill (pthread_self (), SIGABRT); |
| |
| pthread_join (sigusr1_thread, NULL); |
| pthread_join (sigusr2_thread, NULL); |
| all_threads_done (); |
| |
| return 0; |
| } |