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-rw-r--r--app/errors.c475
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diff --git a/app/errors.c b/app/errors.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"
+
+#define _GNU_SOURCE /* need the POSIX signal API */
+
+#include <stdlib.h>
+#include <string.h>
+#ifdef HAVE_UNISTD_H
+#include <unistd.h>
+#endif
+
+#include <gio/gio.h>
+#include <glib/gstdio.h>
+
+#include <gdk-pixbuf/gdk-pixbuf.h>
+#include <gegl.h>
+
+#include "libgimpbase/gimpbase.h"
+
+#include "core/core-types.h"
+
+#include "core/gimp.h"
+#include "core/gimpdrawable.h"
+#include "core/gimpimage.h"
+#include "core/gimpitem.h"
+#include "core/gimpparamspecs.h"
+
+#include "config/gimpcoreconfig.h"
+
+#include "pdb/gimppdb.h"
+
+#include "errors.h"
+#include "gimp-log.h"
+
+#ifdef G_OS_WIN32
+#include <windows.h>
+#endif
+
+/* private variables */
+
+static Gimp *the_errors_gimp = NULL;
+static gboolean use_debug_handler = FALSE;
+static GimpStackTraceMode stack_trace_mode = GIMP_STACK_TRACE_QUERY;
+static gchar *full_prog_name = NULL;
+static gchar *backtrace_file = NULL;
+static gchar *backup_path = NULL;
+static GimpLogHandler log_domain_handler = 0;
+static guint global_handler_id = 0;
+
+
+/* local function prototypes */
+
+static void gimp_message_log_func (const gchar *log_domain,
+ GLogLevelFlags flags,
+ const gchar *message,
+ gpointer data);
+static void gimp_error_log_func (const gchar *domain,
+ GLogLevelFlags flags,
+ const gchar *message,
+ gpointer data) G_GNUC_NORETURN;
+
+static G_GNUC_NORETURN void gimp_eek (const gchar *reason,
+ const gchar *message,
+ gboolean use_handler);
+
+
+/* public functions */
+
+void
+errors_init (Gimp *gimp,
+ const gchar *_full_prog_name,
+ gboolean _use_debug_handler,
+ GimpStackTraceMode _stack_trace_mode,
+ const gchar *_backtrace_file)
+{
+ g_return_if_fail (GIMP_IS_GIMP (gimp));
+ g_return_if_fail (_full_prog_name != NULL);
+ g_return_if_fail (full_prog_name == NULL);
+
+#ifdef GIMP_UNSTABLE
+ g_printerr ("This is a development version of GIMP. "
+ "Debug messages may appear here.\n\n");
+#endif /* GIMP_UNSTABLE */
+
+ the_errors_gimp = gimp;
+ use_debug_handler = _use_debug_handler ? TRUE : FALSE;
+ stack_trace_mode = _stack_trace_mode;
+ full_prog_name = g_strdup (_full_prog_name);
+
+ /* Create parent directories for both the crash and backup files. */
+ backtrace_file = g_path_get_dirname (_backtrace_file);
+ backup_path = g_build_filename (gimp_directory (), "backups", NULL);
+
+ g_mkdir_with_parents (backtrace_file, S_IRUSR | S_IWUSR | S_IXUSR);
+ g_free (backtrace_file);
+ backtrace_file = g_strdup (_backtrace_file);
+
+ g_mkdir_with_parents (backup_path, S_IRUSR | S_IWUSR | S_IXUSR);
+ g_free (backup_path);
+ backup_path = g_build_filename (gimp_directory (), "backups",
+ "backup-XXX.xcf", NULL);
+
+ log_domain_handler = gimp_log_set_handler (FALSE,
+ G_LOG_LEVEL_WARNING |
+ G_LOG_LEVEL_MESSAGE |
+ G_LOG_LEVEL_CRITICAL,
+ gimp_message_log_func, gimp);
+
+ global_handler_id = g_log_set_handler (NULL,
+ G_LOG_LEVEL_ERROR | G_LOG_FLAG_FATAL,
+ gimp_error_log_func, gimp);
+}
+
+void
+errors_exit (void)
+{
+ if (log_domain_handler)
+ {
+ gimp_log_remove_handler (log_domain_handler);
+
+ log_domain_handler = 0;
+ }
+
+ if (global_handler_id)
+ {
+ g_log_remove_handler (NULL, global_handler_id);
+
+ global_handler_id = 0;
+ }
+
+ the_errors_gimp = NULL;
+
+ if (backtrace_file)
+ g_free (backtrace_file);
+ if (full_prog_name)
+ g_free (full_prog_name);
+ if (backup_path)
+ g_free (backup_path);
+}
+
+GList *
+errors_recovered (void)
+{
+ GList *recovered = NULL;
+ gchar *backup_path = g_build_filename (gimp_directory (), "backups", NULL);
+ GDir *backup_dir = NULL;
+
+ if ((backup_dir = g_dir_open (backup_path, 0, NULL)))
+ {
+ const gchar *file;
+
+ while ((file = g_dir_read_name (backup_dir)))
+ {
+ if (g_str_has_suffix (file, ".xcf"))
+ {
+ gchar *path = g_build_filename (backup_path, file, NULL);
+
+ if (g_file_test (path, G_FILE_TEST_IS_REGULAR) &&
+ ! g_file_test (path, G_FILE_TEST_IS_SYMLINK))
+ {
+ /* A quick basic security check. It is not foolproof,
+ * but better than nothing to make sure we are not
+ * trying to read, then delete a folder or a symlink
+ * to a file outside the backup directory.
+ */
+ recovered = g_list_append (recovered, path);
+ }
+ else
+ {
+ g_free (path);
+ }
+ }
+ }
+
+ g_dir_close (backup_dir);
+ }
+ g_free (backup_path);
+
+ return recovered;
+}
+
+void
+gimp_fatal_error (const gchar *message)
+{
+ gimp_eek ("fatal error", message, TRUE);
+}
+
+void
+gimp_terminate (const gchar *message)
+{
+ gimp_eek ("terminated", message, use_debug_handler);
+}
+
+
+/* private functions */
+
+static void
+gimp_message_log_func (const gchar *log_domain,
+ GLogLevelFlags flags,
+ const gchar *message,
+ gpointer data)
+{
+ Gimp *gimp = data;
+ GimpCoreConfig *config = gimp->config;
+ const gchar *msg_domain = NULL;
+ GimpMessageSeverity severity = GIMP_MESSAGE_WARNING;
+ gboolean gui_message = TRUE;
+ GimpDebugPolicy debug_policy;
+
+ /* All GIMP messages are processed under the same domain, but
+ * we need to keep the log domain information for third party
+ * messages.
+ */
+ if (! log_domain ||
+ (! g_str_has_prefix (log_domain, "Gimp") &&
+ ! g_str_has_prefix (log_domain, "LibGimp")))
+ msg_domain = log_domain;
+
+ /* If debug policy requires it, WARNING and CRITICAL errors must be
+ * routed for appropriate debugging.
+ */
+ g_object_get (G_OBJECT (config),
+ "debug-policy", &debug_policy,
+ NULL);
+
+ switch (flags & G_LOG_LEVEL_MASK)
+ {
+ case G_LOG_LEVEL_WARNING:
+ severity = GIMP_MESSAGE_BUG_WARNING;
+ if (debug_policy > GIMP_DEBUG_POLICY_WARNING)
+ gui_message = FALSE;
+ break;
+ case G_LOG_LEVEL_CRITICAL:
+ severity = GIMP_MESSAGE_BUG_CRITICAL;
+ if (debug_policy > GIMP_DEBUG_POLICY_CRITICAL)
+ gui_message = FALSE;
+ break;
+ }
+
+ if (gimp && gui_message)
+ {
+ gimp_show_message (gimp, NULL, severity, msg_domain, message);
+ }
+ else
+ {
+ const gchar *reason = "Message";
+
+ gimp_enum_get_value (GIMP_TYPE_MESSAGE_SEVERITY, severity,
+ NULL, NULL, &reason, NULL);
+
+ g_printerr ("%s: %s-%s: %s\n",
+ gimp_filename_to_utf8 (full_prog_name),
+ log_domain, reason, message);
+ }
+}
+
+static void
+gimp_error_log_func (const gchar *domain,
+ GLogLevelFlags flags,
+ const gchar *message,
+ gpointer data)
+{
+ gimp_fatal_error (message);
+}
+
+static void
+gimp_eek (const gchar *reason,
+ const gchar *message,
+ gboolean use_handler)
+{
+ GimpCoreConfig *config = the_errors_gimp->config;
+ gboolean eek_handled = FALSE;
+ GimpDebugPolicy debug_policy;
+ GList *iter;
+ gint num_idx;
+ gint i = 0;
+
+ /* GIMP has 2 ways to handle termination signals and fatal errors: one
+ * is the stack trace mode which is set at start as command line
+ * option --stack-trace-mode, this won't change for the length of the
+ * session and outputs a trace in terminal; the other is set in
+ * preferences, outputs a trace in a GUI and can change anytime during
+ * the session.
+ * The GUI backtrace has priority if it is set.
+ */
+ g_object_get (G_OBJECT (config),
+ "debug-policy", &debug_policy,
+ NULL);
+
+ /* Let's just always output on stdout at least so that there is a
+ * trace if the rest fails. */
+ g_printerr ("%s: %s: %s\n", full_prog_name, reason, message);
+
+#if ! defined (G_OS_WIN32) || defined (HAVE_EXCHNDL)
+
+ if (use_handler)
+ {
+#ifndef GIMP_CONSOLE_COMPILATION
+ if (debug_policy != GIMP_DEBUG_POLICY_NEVER &&
+ ! the_errors_gimp->no_interface &&
+ backtrace_file)
+ {
+ FILE *fd;
+ gboolean has_backtrace = TRUE;
+
+ /* If GUI backtrace enabled (it is disabled by default), it
+ * takes precedence over the command line argument.
+ */
+#ifdef G_OS_WIN32
+ const gchar *gimpdebug = "gimp-debug-tool-" GIMP_TOOL_VERSION ".exe";
+#elif defined (PLATFORM_OSX)
+ const gchar *gimpdebug = "gimp-debug-tool-" GIMP_TOOL_VERSION;
+#else
+ const gchar *gimpdebug = LIBEXECDIR "/gimp-debug-tool-" GIMP_TOOL_VERSION;
+#endif
+ gchar *args[9] = { (gchar *) gimpdebug, full_prog_name, NULL,
+ (gchar *) reason, (gchar *) message,
+ backtrace_file, the_errors_gimp->config->last_known_release,
+ NULL, NULL };
+ gchar pid[16];
+ gchar timestamp[16];
+
+ g_snprintf (pid, 16, "%u", (guint) getpid ());
+ args[2] = pid;
+
+ g_snprintf (timestamp, 16, "%lu", the_errors_gimp->config->last_release_timestamp);
+ args[7] = timestamp;
+
+#ifndef G_OS_WIN32
+ /* On Win32, the trace has already been processed by ExcHnl
+ * and is waiting for us in a text file.
+ */
+ fd = g_fopen (backtrace_file, "w");
+ has_backtrace = gimp_stack_trace_print ((const gchar *) full_prog_name,
+ fd, NULL);
+ fclose (fd);
+#endif
+
+ /* We don't care about any return value. If it fails, too
+ * bad, we just won't have any stack trace.
+ * We still need to use the sync() variant because we have
+ * to keep GIMP up long enough for the debugger to get its
+ * trace.
+ */
+ if (has_backtrace &&
+ g_file_test (backtrace_file, G_FILE_TEST_IS_REGULAR) &&
+ g_spawn_async (NULL, args, NULL,
+ G_SPAWN_SEARCH_PATH | G_SPAWN_STDERR_TO_DEV_NULL | G_SPAWN_STDOUT_TO_DEV_NULL,
+ NULL, NULL, NULL, NULL))
+ eek_handled = TRUE;
+ }
+#endif /* !GIMP_CONSOLE_COMPILATION */
+
+#ifndef G_OS_WIN32
+ if (! eek_handled)
+ {
+ switch (stack_trace_mode)
+ {
+ case GIMP_STACK_TRACE_NEVER:
+ break;
+
+ case GIMP_STACK_TRACE_QUERY:
+ {
+ sigset_t sigset;
+
+ sigemptyset (&sigset);
+ sigprocmask (SIG_SETMASK, &sigset, NULL);
+
+ if (the_errors_gimp)
+ gimp_gui_ungrab (the_errors_gimp);
+
+ gimp_stack_trace_query ((const gchar *) full_prog_name);
+ }
+ break;
+
+ case GIMP_STACK_TRACE_ALWAYS:
+ {
+ sigset_t sigset;
+
+ sigemptyset (&sigset);
+ sigprocmask (SIG_SETMASK, &sigset, NULL);
+
+ gimp_stack_trace_print ((const gchar *) full_prog_name,
+ stdout, NULL);
+ }
+ break;
+
+ default:
+ break;
+ }
+ }
+#endif /* ! G_OS_WIN32 */
+ }
+#endif /* ! G_OS_WIN32 || HAVE_EXCHNDL */
+
+#if defined (G_OS_WIN32) && ! defined (GIMP_CONSOLE_COMPILATION)
+ /* g_on_error_* don't do anything reasonable on Win32. */
+ if (! eek_handled && ! the_errors_gimp->no_interface)
+ MessageBox (NULL, g_strdup_printf ("%s: %s", reason, message),
+ full_prog_name, MB_OK|MB_ICONERROR);
+#endif
+
+ /* Let's try to back-up all unsaved images!
+ * It is not 100%: when I tested with various bugs created on purpose,
+ * I had cases where saving failed. I am not sure if this is because
+ * of some memory management along the way to XCF saving or some other
+ * messed up state of GIMP, but this is normal not to expect too much
+ * during a crash.
+ * Nevertheless in various test cases, I had successful backups XCF of
+ * the work in progress. Yeah!
+ */
+ if (backup_path)
+ {
+ /* increase the busy counter, so XCF saving calling
+ * gimp_set_busy() and gimp_unset_busy() won't call the GUI
+ * layer and do whatever windowing system calls to set cursors.
+ */
+ the_errors_gimp->busy++;
+
+ /* The index of 'XXX' in backup_path string. */
+ num_idx = strlen (backup_path) - 7;
+
+ iter = gimp_get_image_iter (the_errors_gimp);
+ for (; iter && i < 1000; iter = iter->next)
+ {
+ GimpImage *image = iter->data;
+ GimpItem *item;
+
+ if (! gimp_image_is_dirty (image))
+ continue;
+
+ item = GIMP_ITEM (gimp_image_get_active_drawable (image));
+
+ /* This is a trick because we want to avoid any memory
+ * allocation when the process is abnormally terminated.
+ * We just assume that you'll never have more than 1000 images
+ * open (which is already far fetched).
+ */
+ backup_path[num_idx + 2] = '0' + (i % 10);
+ backup_path[num_idx + 1] = '0' + ((i/10) % 10);
+ backup_path[num_idx] = '0' + ((i/100) % 10);
+
+ /* Saving. */
+ gimp_pdb_execute_procedure_by_name (the_errors_gimp->pdb,
+ gimp_get_user_context (the_errors_gimp),
+ NULL, NULL,
+ "gimp-xcf-save",
+ GIMP_TYPE_INT32, 0,
+ GIMP_TYPE_IMAGE_ID, gimp_image_get_ID (image),
+ GIMP_TYPE_DRAWABLE_ID, gimp_item_get_ID (item),
+ G_TYPE_STRING, backup_path,
+ G_TYPE_STRING, backup_path,
+ G_TYPE_NONE);
+ i++;
+ }
+ }
+
+ exit (EXIT_FAILURE);
+}