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.
132 lines
3.0 KiB
C
132 lines
3.0 KiB
C
/* Test case for forgotten hw-watchpoints after fork()-off of a process.
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Copyright 2012-2024 Free Software Foundation, Inc.
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This file is part of GDB.
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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 "watchpoint-fork.h"
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#include <string.h>
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#include <errno.h>
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#include <unistd.h>
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#include <assert.h>
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#include <signal.h>
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#include <stdio.h>
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/* `pid_t' may not be available. */
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static volatile int usr1_got;
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static void
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handler_usr1 (int signo)
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{
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usr1_got++;
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}
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void
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forkoff (int nr)
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{
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int child, save_parent = getpid ();
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int i;
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struct sigaction act, oldact;
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#ifdef THREAD
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void *thread_result;
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#endif
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memset (&act, 0, sizeof act);
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act.sa_flags = SA_RESTART;
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act.sa_handler = handler_usr1;
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sigemptyset (&act.sa_mask);
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i = sigaction (SIGUSR1, &act, &oldact);
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assert (i == 0);
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child = fork ();
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switch (child)
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{
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case -1:
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assert (0);
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default:
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#if DEBUG
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printf ("parent%d: %d\n", nr, (int) child);
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#endif
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/* Sleep for a while to possibly get incorrectly ATTACH_THREADed by GDB
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tracing the child fork with no longer valid thread/lwp entries of the
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parent. */
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i = sleep (2);
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assert (i == 0);
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/* We must not get caught here (against a forgotten breakpoint). */
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var++;
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marker ();
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#ifdef THREAD
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/* And neither got caught our thread. */
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step = 99;
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i = pthread_join (thread, &thread_result);
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assert (i == 0);
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assert (thread_result == (void *) 99UL);
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#endif
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/* Be sure our child knows we did not get caught above. */
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i = kill (child, SIGUSR1);
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assert (i == 0);
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/* Sleep for a while to check GDB's `info threads' no longer tracks us in
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the child fork. */
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i = sleep (2);
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assert (i == 0);
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_exit (0);
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case 0:
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#if DEBUG
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printf ("child%d: %d\n", nr, (int) getpid ());
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#endif
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/* Let the parent signal us about its success. Be careful of races. */
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for (;;)
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{
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/* Parent either died (and USR1_GOT is zero) or it succeeded. */
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if (getppid () != save_parent)
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break;
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if (kill (getppid (), 0) != 0)
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break;
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/* Parent succeeded? */
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if (usr1_got)
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break;
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#ifdef THREAD
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i = pthread_yield ();
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assert (i == 0);
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#endif
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}
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assert (usr1_got);
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/* We must get caught here (against a false watchpoint removal). */
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marker ();
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}
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i = sigaction (SIGUSR1, &oldact, NULL);
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assert (i == 0);
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}
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