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119 lines
2.5 KiB
C
119 lines
2.5 KiB
C
/* This testcase is part of GDB, the GNU debugger.
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Copyright 2009-2015 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 <unistd.h>
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#include <stdlib.h>
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#include <signal.h>
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unsigned int args[2];
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pthread_barrier_t barrier;
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pthread_t child_thread_2, child_thread_3;
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void
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handler (int signo)
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{
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/* so that thread 3 is sure to run, in case the bug is present. */
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usleep (10);
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}
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void
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callme (void)
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{
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}
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void *
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child_function_3 (void *arg)
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{
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int my_number = (long) arg;
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volatile int *myp = (int *) &args[my_number];
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pthread_barrier_wait (&barrier);
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while (*myp > 0)
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{
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(*myp) ++; /* set breakpoint child_two here */
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callme ();
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}
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pthread_exit (NULL);
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}
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void *
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child_function_2 (void *arg)
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{
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int my_number = (long) arg;
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volatile int *myp = (int *) &args[my_number];
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pthread_barrier_wait (&barrier);
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while (*myp > 0)
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{
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(*myp) ++;
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callme (); /* set breakpoint child_one here */
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}
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*myp = 1;
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while (*myp > 0)
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{
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(*myp) ++;
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callme ();
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}
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pthread_exit (NULL);
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}
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int
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main ()
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{
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int res;
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long i;
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signal (SIGUSR1, handler);
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/* Call these early so that PLTs for these are resolved soon,
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instead of in the threads. RTLD_NOW should work as well. */
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usleep (0);
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pthread_barrier_init (&barrier, NULL, 1);
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pthread_barrier_wait (&barrier);
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pthread_barrier_init (&barrier, NULL, 2);
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i = 0;
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args[i] = 1;
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res = pthread_create (&child_thread_2,
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NULL, child_function_2, (void *) i);
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pthread_barrier_wait (&barrier);
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callme (); /* set wait-thread-2 breakpoint here */
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i = 1;
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args[i] = 1;
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res = pthread_create (&child_thread_3,
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NULL, child_function_3, (void *) i);
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pthread_barrier_wait (&barrier);
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callme (); /* set wait-thread-3 breakpoint here */
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pthread_kill (child_thread_2, SIGUSR1);
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pthread_join (child_thread_2, NULL);
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pthread_join (child_thread_3, NULL);
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exit(EXIT_SUCCESS);
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}
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