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-rw-r--r--app/signals.c186
1 files changed, 186 insertions, 0 deletions
diff --git a/app/signals.c b/app/signals.c
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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 "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;
+ gchar *filename;
+ gchar *dir;
+
+#ifdef G_OS_WIN32
+ /* 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 ();
+ ExcHndlSetLogFileNameA (*backtrace_file);
+
+#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() */
+ 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);
+
+ /* 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 */