Updated French translations for GOLD and LD
[binutils-gdb.git] / gdbsupport / signals-state-save-restore.cc
blob307e238307fb9d47f3a627c63d1d99c5835f48fe
1 /* Copyright (C) 2016-2024 Free Software Foundation, Inc.
3 This file is part of GDB.
5 This program is free software; you can redistribute it and/or modify
6 it under the terms of the GNU General Public License as published by
7 the Free Software Foundation; either version 3 of the License, or
8 (at your option) any later version.
10 This program is distributed in the hope that it will be useful,
11 but WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 GNU General Public License for more details.
15 You should have received a copy of the GNU General Public License
16 along with this program. If not, see <http://www.gnu.org/licenses/>. */
18 #include "common-defs.h"
19 #include "signals-state-save-restore.h"
20 #include "gdbsupport/gdb-sigmask.h"
22 #include <signal.h>
24 /* The original signal actions and mask. */
26 #ifdef HAVE_SIGACTION
27 static struct sigaction original_signal_actions[NSIG];
29 static sigset_t original_signal_mask;
30 #endif
32 /* See signals-state-save-restore.h. */
34 void
35 save_original_signals_state (bool quiet)
37 #ifdef HAVE_SIGACTION
38 int i;
39 int res;
41 res = gdb_sigmask (0, NULL, &original_signal_mask);
42 if (res == -1)
43 perror_with_name (("sigprocmask"));
45 bool found_preinstalled = false;
47 for (i = 1; i < NSIG; i++)
49 struct sigaction *oldact = &original_signal_actions[i];
51 res = sigaction (i, NULL, oldact);
52 if (res == -1 && errno == EINVAL)
54 /* Some signal numbers in the range are invalid. */
55 continue;
57 else if (res == -1)
58 perror_with_name (("sigaction"));
60 /* If we find a custom signal handler already installed, then
61 this function was called too late. This is a warning instead
62 of an internal error because this can also happen if you
63 LD_PRELOAD a library that installs a signal handler early via
64 __attribute__((constructor)), like libSegFault.so. */
65 if (!quiet
66 && oldact->sa_handler != SIG_DFL
67 && oldact->sa_handler != SIG_IGN)
69 found_preinstalled = true;
71 /* Use raw fprintf here because we're being called in early
72 startup, before GDB's filtered streams are created. */
73 fprintf (stderr,
74 _("warning: Found custom handler for signal "
75 "%d (%s) preinstalled.\n"), i,
76 strsignal (i));
80 if (found_preinstalled)
82 fprintf (stderr, _("\
83 Some signal dispositions inherited from the environment (SIG_DFL/SIG_IGN)\n\
84 won't be propagated to spawned programs.\n"));
86 #endif
89 /* See signals-state-save-restore.h. */
91 void
92 restore_original_signals_state (void)
94 #ifdef HAVE_SIGACTION
95 int i;
96 int res;
98 for (i = 1; i < NSIG; i++)
100 res = sigaction (i, &original_signal_actions[i], NULL);
101 if (res == -1 && errno == EINVAL)
103 /* Some signal numbers in the range are invalid. */
104 continue;
106 else if (res == -1)
107 perror_with_name (("sigaction"));
110 res = gdb_sigmask (SIG_SETMASK, &original_signal_mask, NULL);
111 if (res == -1)
112 perror_with_name (("sigprocmask"));
113 #endif