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143 lines
3.2 KiB
C
143 lines
3.2 KiB
C
/* This testcase is part of GDB, the GNU debugger.
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Copyright 2014-2020 Free Software Foundation, Inc.
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>. */
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#include <pthread.h>
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#include <signal.h>
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#include <stdlib.h>
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#include <unistd.h>
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/* Used to individually advance each thread to the desired stopping point. */
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int ready;
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sig_atomic_t sigusr1_received;
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sig_atomic_t sigusr2_received;
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sig_atomic_t sigabrt_received;
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/* Number of threads currently running. */
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int thread_count;
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pthread_mutex_t thread_count_mutex;
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pthread_cond_t thread_count_condvar;
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static void
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incr_thread_count (void)
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{
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pthread_mutex_lock (&thread_count_mutex);
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++thread_count;
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pthread_cond_signal (&thread_count_condvar);
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pthread_mutex_unlock (&thread_count_mutex);
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}
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static void
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sigusr1_handler (int sig)
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{
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sigusr1_received = 1;
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}
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static void
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sigusr2_handler (int sig)
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{
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sigusr2_received = 1;
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}
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static void
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sigabrt_handler (int sig)
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{
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sigabrt_received = 1;
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}
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static void *
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sigusr1_thread_function (void *unused)
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{
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incr_thread_count ();
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while (!ready)
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usleep (100);
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pthread_kill (pthread_self (), SIGUSR1);
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}
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static void *
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sigusr2_thread_function (void *unused)
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{
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incr_thread_count ();
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while (!ready)
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usleep (100);
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/* pthread_kill (pthread_self (), SIGUSR2); - manually injected by gdb */
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}
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/* Wait until all threads are at a point where a backtrace will
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show the thread entry point function. */
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static void
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wait_all_threads_running (int nr_threads)
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{
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pthread_mutex_lock (&thread_count_mutex);
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while (1)
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{
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if (thread_count == nr_threads)
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{
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pthread_mutex_unlock (&thread_count_mutex);
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return;
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}
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pthread_cond_wait (&thread_count_condvar, &thread_count_mutex);
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}
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}
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static void
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all_threads_running (void)
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{
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while (!ready)
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usleep (100);
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}
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static void
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all_threads_done (void)
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{
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}
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int
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main ()
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{
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pthread_t sigusr1_thread, sigusr2_thread;
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/* Protect against running forever. */
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alarm (60);
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signal (SIGUSR1, sigusr1_handler);
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signal (SIGUSR2, sigusr2_handler);
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signal (SIGABRT, sigabrt_handler);
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/* Don't let any thread advance past initialization. */
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ready = 0;
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pthread_mutex_init (&thread_count_mutex, NULL);
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pthread_cond_init (&thread_count_condvar, NULL);
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#define NR_THREADS 2
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pthread_create (&sigusr1_thread, NULL, sigusr1_thread_function, NULL);
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pthread_create (&sigusr2_thread, NULL, sigusr2_thread_function, NULL);
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wait_all_threads_running (NR_THREADS);
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all_threads_running ();
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pthread_kill (pthread_self (), SIGABRT);
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pthread_join (sigusr1_thread, NULL);
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pthread_join (sigusr2_thread, NULL);
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all_threads_done ();
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return 0;
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}
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