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/* GIMP - The GNU Image Manipulation Program
* Copyright (C) 1995 Spencer Kimball and Peter Mattis
*
* 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 <https://www.gnu.org/licenses/>.
*/
#include "config.h"
#include <signal.h>
#include <gio/gio.h>
#include "libgimpbase/gimpbase.h"
#include "libgimpbase/gimpbase-private.h"
#include "core/core-types.h"
#include "core/gimp.h"
#include "errors.h"
#include "signals.h"
#ifdef G_OS_WIN32
#ifdef HAVE_EXCHNDL
#include <windows.h>
#include <time.h>
#include <exchndl.h>
static LPTOP_LEVEL_EXCEPTION_FILTER g_prevExceptionFilter = NULL;
static LONG WINAPI gimp_sigfatal_handler (PEXCEPTION_POINTERS pExceptionInfo);
#endif
#else
static void gimp_sigfatal_handler (gint sig_num) G_GNUC_NORETURN;
#endif
void
gimp_init_signal_handlers (gchar **backtrace_file)
{
time_t t;
#ifdef G_OS_WIN32
gchar *codeview_path;
#endif
gchar *filename;
gchar *dir;
#if defined (G_OS_WIN32) && defined (HAVE_EXCHNDL)
wchar_t *backtrace_file_utf16;
#endif
#ifdef G_OS_WIN32
/* FIXME: https://github.com/jrfonseca/drmingw/issues/91 */
codeview_path = g_build_filename (gimp_installation_directory (),
"bin", NULL);
g_setenv ("_NT_SYMBOL_PATH", codeview_path, TRUE);
g_free (codeview_path);
/* This has to be the non-roaming directory (i.e., the local
directory) as backtraces correspond to the binaries on this
system. */
dir = g_build_filename (g_get_user_data_dir (),
GIMPDIR, GIMP_USER_VERSION, "CrashLog",
NULL);
#else
dir = g_build_filename (gimp_directory (), "CrashLog", NULL);
#endif
time (&t);
filename = g_strdup_printf ("%s-crash-%" G_GUINT64_FORMAT ".txt",
PACKAGE_NAME, (guint64) t);
*backtrace_file = g_build_filename (dir, filename, NULL);
g_free (filename);
g_free (dir);
#ifdef G_OS_WIN32
/* Use Dr. Mingw (dumps backtrace on crash) if it is available. Do
* nothing otherwise on Win32.
* The user won't get any stack trace from glib anyhow.
* Without Dr. MinGW, It's better to let Windows inform about the
* program error, and offer debugging (if the user has installed MSVC
* or some other compiler that knows how to install itself as a
* handler for program errors).
*/
#ifdef HAVE_EXCHNDL
/* Order is very important here. We need to add our signal handler
* first, then run ExcHndlInit() which will add its own handler, so
* that ExcHnl's handler runs first since that's in FILO order.
*/
if (! g_prevExceptionFilter)
g_prevExceptionFilter = SetUnhandledExceptionFilter (gimp_sigfatal_handler);
ExcHndlInit ();
if ((backtrace_file_utf16 = g_utf8_to_utf16 (*backtrace_file, -1, NULL, NULL, NULL)))
{
ExcHndlSetLogFileNameW (backtrace_file_utf16);
g_free (backtrace_file_utf16);
}
#endif /* HAVE_EXCHNDL */
#else
/* Handle fatal signals */
/* these are handled by gimp_terminate() */
gimp_signal_private (SIGHUP, gimp_sigfatal_handler, 0);
gimp_signal_private (SIGINT, gimp_sigfatal_handler, 0);
gimp_signal_private (SIGQUIT, gimp_sigfatal_handler, 0);
gimp_signal_private (SIGTERM, gimp_sigfatal_handler, 0);
/* these are handled by gimp_fatal_error() */
/*
* MacOS has it's own crash handlers which end up fighting the
* these Gimp supplied handlers and leading to very hard to
* deal with hangs (just get a spin dump)
*/
#ifndef PLATFORM_OSX
gimp_signal_private (SIGABRT, gimp_sigfatal_handler, 0);
gimp_signal_private (SIGBUS, gimp_sigfatal_handler, 0);
gimp_signal_private (SIGSEGV, gimp_sigfatal_handler, 0);
gimp_signal_private (SIGFPE, gimp_sigfatal_handler, 0);
#endif
/* Ignore SIGPIPE because plug_in.c handles broken pipes */
gimp_signal_private (SIGPIPE, SIG_IGN, 0);
/* Restart syscalls on SIGCHLD */
gimp_signal_private (SIGCHLD, SIG_DFL, SA_RESTART);
#endif /* G_OS_WIN32 */
}
#ifdef G_OS_WIN32
#ifdef HAVE_EXCHNDL
static LONG WINAPI
gimp_sigfatal_handler (PEXCEPTION_POINTERS pExceptionInfo)
{
EXCEPTION_RECORD *er;
int fatal;
if (pExceptionInfo == NULL ||
pExceptionInfo->ExceptionRecord == NULL)
return EXCEPTION_CONTINUE_SEARCH;
er = pExceptionInfo->ExceptionRecord;
fatal = I_RpcExceptionFilter (er->ExceptionCode);
/* IREF() returns EXCEPTION_CONTINUE_SEARCH for fatal exceptions */
if (fatal == EXCEPTION_CONTINUE_SEARCH)
{
/* Just in case, so that we don't loop or anything similar, just
* re-establish previous handler.
*/
SetUnhandledExceptionFilter (g_prevExceptionFilter);
/* Now process the exception. */
gimp_fatal_error ("unhandled exception");
}
if (g_prevExceptionFilter && g_prevExceptionFilter != gimp_sigfatal_handler)
return g_prevExceptionFilter (pExceptionInfo);
else
return EXCEPTION_CONTINUE_SEARCH;
}
#endif
#else
/* gimp core signal handler for fatal signals */
static void
gimp_sigfatal_handler (gint sig_num)
{
switch (sig_num)
{
case SIGHUP:
case SIGINT:
case SIGQUIT:
case SIGTERM:
gimp_terminate (g_strsignal (sig_num));
break;
case SIGABRT:
case SIGBUS:
case SIGSEGV:
case SIGFPE:
default:
gimp_fatal_error (g_strsignal (sig_num));
break;
}
}
#endif /* G_OS_WIN32 */
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