forked from Imagelibrary/binutils-gdb
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.
106 lines
2.4 KiB
C
106 lines
2.4 KiB
C
/* This testcase is part of GDB, the GNU debugger.
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Copyright 2023-2024 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 <stdio.h>
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#include <unistd.h>
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#include <sys/ptrace.h>
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#include <pthread.h>
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#include <stdlib.h>
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#include <errno.h>
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int fds[2];
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_Atomic pid_t bg_tid = 0;
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pthread_barrier_t barrier;
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#define FIVE_MINUTES (5 * 60)
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/* One thread of the child process. This is traced by the parent
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process. */
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void *
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block (void *ignore)
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{
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bg_tid = gettid ();
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pthread_barrier_wait (&barrier);
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sleep (FIVE_MINUTES);
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return 0;
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}
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/* The parent process blocks in this function. */
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void
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parent_stop (pid_t child_thread_pid)
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{
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sleep (FIVE_MINUTES);
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}
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int
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main ()
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{
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int result;
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pthread_barrier_init (&barrier, NULL, 2);
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result = pipe (fds);
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assert (result != -1);
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pid_t child = fork ();
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if (child != 0)
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{
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/* Parent. */
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close (fds[1]);
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pid_t the_tid;
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result = read (fds[0], &the_tid, sizeof (the_tid));
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assert (result == sizeof (the_tid));
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/* Trace a single, non-main thread of the child. This should
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prevent gdb from attaching to the child at all. The bug here
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was that gdb would get into an infinite loop repeatedly
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trying to attach to this thread. */
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result = ptrace (PTRACE_SEIZE, the_tid, (void *) 0, (void *) 0);
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if (result == -1)
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perror ("ptrace");
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parent_stop (child);
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}
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else
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{
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/* Child. */
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close (fds[0]);
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pthread_t thr;
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result = pthread_create (&thr, 0, block, 0);
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assert (result == 0);
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/* Wait until the TID has been assigned. */
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pthread_barrier_wait (&barrier);
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assert (bg_tid != 0);
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result = write (fds[1], &bg_tid, sizeof (bg_tid));
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assert (result == sizeof (bg_tid));
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sleep (FIVE_MINUTES);
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}
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exit (0);
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}
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