binutils-gdb/gdbsupport/signals-state-save-restore.c
Tom Tromey 01027315f5 Move gdbsupport to the top level
This patch moves the gdbsupport directory to the top level.  This is
the next step in the ongoing project to move gdbserver to the top
level.

The bulk of this patch was created by "git mv gdb/gdbsupport gdbsupport".

This patch then adds a build system to gdbsupport and wires it into
the top level.  Then it changes gdb to use the top-level build.

gdbserver, on the other hand, is not yet changed.  It still does its
own build of gdbsupport.

ChangeLog
2020-01-14  Tom Tromey  <tom@tromey.com>

	* src-release.sh (GDB_SUPPORT_DIRS): Add gdbsupport.
	* MAINTAINERS: Add gdbsupport.
	* configure: Rebuild.
	* configure.ac (configdirs): Add gdbsupport.
	* gdbsupport: New directory, move from gdb/gdbsupport.
	* Makefile.def (host_modules, dependencies): Add gnulib.
	* Makefile.in: Rebuild.

gdb/ChangeLog
2020-01-14  Tom Tromey  <tom@tromey.com>

	* nat/x86-linux-dregs.c: Include configh.h.
	* nat/linux-ptrace.c: Include configh.h.
	* nat/linux-btrace.c: Include configh.h.
	* defs.h: Include config.h, bfd.h.
	* configure.ac: Don't source common.host.
	(CONFIG_OBS, CONFIG_SRCS): Remove gdbsupport files.
	* configure: Rebuild.
	* acinclude.m4: Update path.
	* Makefile.in (SUPPORT, LIBSUPPORT, INCSUPPORT): New variables.
	(CONFIG_SRC_SUBDIR): Remove gdbsupport.
	(INTERNAL_CFLAGS_BASE): Add INCSUPPORT.
	(CLIBS): Add LIBSUPPORT.
	(CDEPS): Likewise.
	(COMMON_SFILES): Remove gdbsupport files.
	(HFILES_NO_SRCDIR): Likewise.
	(stamp-version): Update path to create-version.sh.
	(ALLDEPFILES): Remove gdbsupport files.

gdb/gdbserver/ChangeLog
2020-01-14  Tom Tromey  <tom@tromey.com>

	* server.h: Include config.h.
	* gdbreplay.c: Include config.h.
	* configure: Rebuild.
	* configure.ac: Don't source common.host.
	* acinclude.m4: Update path.
	* Makefile.in (INCSUPPORT): New variable.
	(INCLUDE_CFLAGS): Add INCSUPPORT.
	(SFILES): Update paths.
	(version-generated.c): Update path to create-version.sh.
	(gdbsupport/%-ipa.o, gdbsupport/%.o): Update paths.

gdbsupport/ChangeLog
2020-01-14  Tom Tromey  <tom@tromey.com>

	* common-defs.h: Add GDBSERVER case.  Update includes.
	* acinclude.m4, aclocal.m4, config.in, configure, configure.ac,
	Makefile.am, Makefile.in, README: New files.
	* Moved from ../gdb/gdbsupport/

Change-Id: I07632e7798635c1bab389bf885971e584fb4bb78
2020-01-14 16:25:02 -07:00

115 lines
3.0 KiB
C

/* Copyright (C) 2016-2020 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 "common-defs.h"
#include "signals-state-save-restore.h"
#include "gdbsupport/gdb-sigmask.h"
#include <signal.h>
/* The original signal actions and mask. */
#ifdef HAVE_SIGACTION
static struct sigaction original_signal_actions[NSIG];
static sigset_t original_signal_mask;
#endif
/* See signals-state-save-restore.h. */
void
save_original_signals_state (bool quiet)
{
#ifdef HAVE_SIGACTION
int i;
int res;
res = gdb_sigmask (0, NULL, &original_signal_mask);
if (res == -1)
perror_with_name (("sigprocmask"));
bool found_preinstalled = false;
for (i = 1; i < NSIG; i++)
{
struct sigaction *oldact = &original_signal_actions[i];
res = sigaction (i, NULL, oldact);
if (res == -1 && errno == EINVAL)
{
/* Some signal numbers in the range are invalid. */
continue;
}
else if (res == -1)
perror_with_name (("sigaction"));
/* If we find a custom signal handler already installed, then
this function was called too late. This is a warning instead
of an internal error because this can also happen if you
LD_PRELOAD a library that installs a signal handler early via
__attribute__((constructor)), like libSegFault.so. */
if (!quiet
&& oldact->sa_handler != SIG_DFL
&& oldact->sa_handler != SIG_IGN)
{
found_preinstalled = true;
/* Use raw fprintf here because we're being called in early
startup, before GDB's filtered streams are created. */
fprintf (stderr,
_("warning: Found custom handler for signal "
"%d (%s) preinstalled.\n"), i,
strsignal (i));
}
}
if (found_preinstalled)
{
fprintf (stderr, _("\
Some signal dispositions inherited from the environment (SIG_DFL/SIG_IGN)\n\
won't be propagated to spawned programs.\n"));
}
#endif
}
/* See signals-state-save-restore.h. */
void
restore_original_signals_state (void)
{
#ifdef HAVE_SIGACTION
int i;
int res;
for (i = 1; i < NSIG; i++)
{
res = sigaction (i, &original_signal_actions[i], NULL);
if (res == -1 && errno == EINVAL)
{
/* Some signal numbers in the range are invalid. */
continue;
}
else if (res == -1)
perror_with_name (("sigaction"));
}
res = gdb_sigmask (SIG_SETMASK, &original_signal_mask, NULL);
if (res == -1)
perror_with_name (("sigprocmask"));
#endif
}