mirror of
https://sourceware.org/git/binutils-gdb.git
synced 2024-12-27 04:52:05 +08:00
4a94e36819
This commit brings all the changes made by running gdb/copyright.py as per GDB's Start of New Year Procedure. For the avoidance of doubt, all changes in this commits were performed by the script.
94 lines
2.6 KiB
C
94 lines
2.6 KiB
C
/* This testcase is part of GDB, the GNU debugger.
|
|
|
|
Copyright 2016-2022 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/>. */
|
|
|
|
#define _GNU_SOURCE
|
|
#include <stdlib.h>
|
|
#include <unistd.h>
|
|
#include <sched.h>
|
|
#include <pthread.h>
|
|
|
|
static void
|
|
marker ()
|
|
{}
|
|
|
|
#define STACK_SIZE 0x1000
|
|
|
|
/* These are used to signal that the threads have started correctly. The
|
|
GLOBAL_THREAD_COUNT is set to the number of threads in main, then
|
|
decremented (under a lock) in each new thread. */
|
|
pthread_mutex_t global_lock = PTHREAD_MUTEX_INITIALIZER;
|
|
int global_thread_count = 0;
|
|
|
|
static int
|
|
clone_fn (void *unused)
|
|
{
|
|
/* Signal that this thread has started correctly. */
|
|
if (pthread_mutex_lock (&global_lock) != 0)
|
|
abort ();
|
|
global_thread_count--;
|
|
if (pthread_mutex_unlock (&global_lock) != 0)
|
|
abort ();
|
|
|
|
return 0;
|
|
}
|
|
|
|
int
|
|
main (void)
|
|
{
|
|
int i, pid;
|
|
unsigned char *stack[6];
|
|
|
|
/* Due to bug gdb/19675 the cloned thread _might_ try to reenter main
|
|
(this depends on where the displaced instruction is placed for
|
|
execution). However, if we do reenter main then lets ensure we fail
|
|
hard rather then just silently executing the code below. */
|
|
static int started = 0;
|
|
if (!started)
|
|
started = 1;
|
|
else
|
|
abort ();
|
|
|
|
for (i = 0; i < (sizeof (stack) / sizeof (stack[0])); i++)
|
|
stack[i] = malloc (STACK_SIZE);
|
|
|
|
global_thread_count = (sizeof (stack) / sizeof (stack[0]));
|
|
|
|
for (i = 0; i < (sizeof (stack) / sizeof (stack[0])); i++)
|
|
{
|
|
pid = clone (clone_fn, stack[i] + STACK_SIZE, CLONE_FILES | CLONE_VM,
|
|
NULL);
|
|
}
|
|
|
|
for (i = 0; i < (sizeof (stack) / sizeof (stack[0])); i++)
|
|
free (stack[i]);
|
|
|
|
/* Set an alarm so we don't end up stuck waiting for threads that might
|
|
never start correctly. */
|
|
alarm (120);
|
|
|
|
/* Now wait for all the threads to start up. */
|
|
while (global_thread_count != 0)
|
|
{
|
|
/* Force memory barrier so GLOBAL_THREAD_COUNT will be refetched. */
|
|
asm volatile ("" ::: "memory");
|
|
sleep (1);
|
|
}
|
|
|
|
/* Call marker, this is what GDB is waiting for. */
|
|
marker ();
|
|
}
|