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80 lines
2.0 KiB
C
80 lines
2.0 KiB
C
/* This testcase is part of GDB, the GNU debugger.
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Copyright 2002-2018 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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This file is copied from schedlock.c. */
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#include <stdio.h>
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#include <unistd.h>
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#include <stdlib.h>
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#include <pthread.h>
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void *thread_function (void *arg); /* Function executed by each thread. */
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#define NUM 5
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unsigned int args[NUM+1];
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int
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main ()
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{
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int res;
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pthread_t threads[NUM];
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void *thread_result;
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long i;
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/* To keep the test determinative, initialize args first,
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then start all the threads. Otherwise, the way watchthreads.exp
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is written, we have to worry about things like threads[0] getting
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to 29 hits of args[0] before args[1] gets changed. */
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for (i = 0; i < NUM; i++)
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{
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/* The call to usleep is so that when the watchpoint triggers,
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the pc is still on the same line. */
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args[i] = 1; usleep (1); /* Init value. */
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}
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for (i = 0; i < NUM; i++)
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{
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res = pthread_create (&threads[i],
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NULL,
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thread_function,
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(void *) i);
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}
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args[i] = 1;
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thread_function ((void *) i);
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exit (EXIT_SUCCESS);
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}
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void *
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thread_function (void *arg)
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{
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int my_number = (long) arg;
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int *myp = (int *) &args[my_number];
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/* Don't run forever. Run just short of it :) */
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while (*myp > 0)
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{
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(*myp) ++; usleep (1); /* Loop increment. */
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}
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pthread_exit (NULL);
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}
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