mirror of
https://sourceware.org/git/binutils-gdb.git
synced 2024-11-27 03:51:15 +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.
127 lines
3.1 KiB
C
127 lines
3.1 KiB
C
/* Self tests for scoped_ignored_signal for GDB, the GNU debugger.
|
|
|
|
Copyright (C) 2021-2022 Free Software Foundation, Inc.
|
|
|
|
This file is part of GDB.
|
|
|
|
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/>. */
|
|
|
|
#include "defs.h"
|
|
#include "gdbsupport/scoped_ignore_signal.h"
|
|
#include "gdbsupport/selftest.h"
|
|
#include "gdbsupport/scope-exit.h"
|
|
#include <unistd.h>
|
|
#include <signal.h>
|
|
|
|
namespace selftests {
|
|
namespace scoped_ignore_sig {
|
|
|
|
#ifdef SIGPIPE
|
|
|
|
/* True if the SIGPIPE handler ran. */
|
|
static volatile sig_atomic_t got_sigpipe = 0;
|
|
|
|
/* SIGPIPE handler for testing. */
|
|
|
|
static void
|
|
handle_sigpipe (int)
|
|
{
|
|
got_sigpipe = 1;
|
|
}
|
|
|
|
/* Test scoped_ignore_sigpipe. */
|
|
|
|
static void
|
|
test_sigpipe ()
|
|
{
|
|
auto *osig = signal (SIGPIPE, handle_sigpipe);
|
|
SCOPE_EXIT { signal (SIGPIPE, osig); };
|
|
|
|
#ifdef HAVE_SIGPROCMASK
|
|
/* Make sure SIGPIPE isn't blocked. */
|
|
sigset_t set, old_state;
|
|
sigemptyset (&set);
|
|
sigaddset (&set, SIGPIPE);
|
|
sigprocmask (SIG_UNBLOCK, &set, &old_state);
|
|
SCOPE_EXIT { sigprocmask (SIG_SETMASK, &old_state, nullptr); };
|
|
#endif
|
|
|
|
/* Create pipe, and close read end so that writes to the pipe fail
|
|
with EPIPE. */
|
|
|
|
int fd[2];
|
|
char c = 0xff;
|
|
int r;
|
|
|
|
r = pipe (fd);
|
|
SELF_CHECK (r == 0);
|
|
|
|
close (fd[0]);
|
|
SCOPE_EXIT { close (fd[1]); };
|
|
|
|
/* Check that writing to the pipe results in EPIPE. EXPECT_SIG
|
|
indicates whether a SIGPIPE signal is expected. */
|
|
auto check_pipe_write = [&] (bool expect_sig)
|
|
{
|
|
got_sigpipe = 0;
|
|
errno = 0;
|
|
|
|
r = write (fd[1], &c, 1);
|
|
SELF_CHECK (r == -1 && errno == EPIPE
|
|
&& got_sigpipe == expect_sig);
|
|
};
|
|
|
|
/* Check that without a scoped_ignore_sigpipe in scope we indeed get
|
|
a SIGPIPE signal. */
|
|
check_pipe_write (true);
|
|
|
|
/* Now check that with a scoped_ignore_sigpipe in scope, SIGPIPE is
|
|
ignored/blocked. */
|
|
{
|
|
scoped_ignore_sigpipe ignore1;
|
|
|
|
check_pipe_write (false);
|
|
|
|
/* Check that scoped_ignore_sigpipe nests correctly. */
|
|
{
|
|
scoped_ignore_sigpipe ignore2;
|
|
|
|
check_pipe_write (false);
|
|
}
|
|
|
|
/* If nesting works correctly, this write results in no
|
|
SIGPIPE. */
|
|
check_pipe_write (false);
|
|
}
|
|
|
|
/* No scoped_ignore_sigpipe is in scope anymore, so this should
|
|
result in a SIGPIPE signal. */
|
|
check_pipe_write (true);
|
|
}
|
|
|
|
#endif /* SIGPIPE */
|
|
|
|
} /* namespace scoped_ignore_sig */
|
|
} /* namespace selftests */
|
|
|
|
void _initialize_scoped_ignore_signal_selftests ();
|
|
void
|
|
_initialize_scoped_ignore_signal_selftests ()
|
|
{
|
|
#ifdef SIGPIPE
|
|
selftests::register_test ("scoped_ignore_sigpipe",
|
|
selftests::scoped_ignore_sig::test_sigpipe);
|
|
#endif
|
|
}
|