1d506c26d9
This commit is the result of the following actions:
- Running gdb/copyright.py to update all of the copyright headers to
include 2024,
- Manually updating a few files the copyright.py script told me to
update, these files had copyright headers embedded within the
file,
- Regenerating gdbsupport/Makefile.in to refresh it's copyright
date,
- Using grep to find other files that still mentioned 2023. If
these files were updated last year from 2022 to 2023 then I've
updated them this year to 2024.
I'm sure I've probably missed some dates. Feel free to fix them up as
you spot them.
123 lines
3 KiB
C
123 lines
3 KiB
C
/* This testcase is part of GDB, the GNU debugger.
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Copyright 2021-2024 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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#define _GNU_SOURCE
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#include <assert.h>
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#include <pthread.h>
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#include <stdlib.h>
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#include <stdio.h>
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#include <unistd.h>
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#include <string.h>
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#define THREADS 20
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static volatile unsigned int global_var = 123;
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/* Wrapper around pthread_create. */
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static void
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create_thread (pthread_t *child,
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void *(*start_routine) (void *), void *arg)
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{
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int rc;
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while ((rc = pthread_create (child, NULL, start_routine, arg)) != 0)
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{
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fprintf (stderr, "unexpected error from pthread_create: %s (%d)\n",
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strerror (rc), rc);
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sleep (1);
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}
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}
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/* Data passed to threads on creation. This is allocated on the heap
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and ownership transferred from parent to child. */
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struct thread_arg
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{
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/* The thread's parent. */
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pthread_t parent;
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/* Whether to call pthread_join on the parent. */
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int join_parent;
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};
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/* Entry point for threads. */
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static void *
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thread_fn (void *arg)
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{
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struct thread_arg *p = arg;
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/* Passing no argument makes the thread exit immediately. */
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if (p == NULL)
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return NULL;
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if (p->join_parent)
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assert (pthread_join (p->parent, NULL) == 0);
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/* Spawn a number of threads that exit immediately, and then join
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them. The idea is to maximize the time window when we mostly
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have threads exiting. */
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{
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pthread_t child[THREADS];
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int i;
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/* Passing no argument makes the thread exit immediately. */
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for (i = 0; i < THREADS; i++)
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create_thread (&child[i], thread_fn, NULL);
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for (i = 0; i < THREADS; i++)
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pthread_join (child[i], NULL);
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}
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/* Spawn a new thread that joins us, and exit. The idea here is to
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not have any thread that stays around forever. */
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{
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pthread_t child;
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p->parent = pthread_self ();
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p->join_parent = 1;
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create_thread (&child, thread_fn, p);
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}
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return NULL;
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}
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int
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main (void)
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{
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int i;
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for (i = 0; i < 4; i++)
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{
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struct thread_arg *p;
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pthread_t child;
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p = malloc (sizeof *p);
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p->parent = pthread_self ();
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/* Only join the parent once. */
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if (i == 0)
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p->join_parent = 1;
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else
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p->join_parent = 0;
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create_thread (&child, thread_fn, p);
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}
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/* Exit the leader to make sure that we can access memory with the
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leader gone. */
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pthread_exit (NULL);
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}
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