1 /* -*- Mode: C++; tab-width: 40; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
2 /* This Source Code Form is subject to the terms of the Mozilla Public
3 * License, v. 2.0. If a copy of the MPL was not distributed with this
4 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
5
6 #include "nsGDKErrorHandler.h"
7
8 #include <gtk/gtk.h>
9 #include <gdk/gdkx.h>
10 #include <errno.h>
11 #include <stdlib.h>
12 #include <string.h>
13
14 #include "nsDebug.h"
15 #include "nsString.h"
16 #include "nsX11ErrorHandler.h"
17
18 #include "prenv.h"
19
20
21 /* See https://bugzilla.gnome.org/show_bug.cgi?id=629608#c8
22 *
23 * GDK implements X11 error traps to ignore X11 errors.
24 * Unfortunatelly We don't know which X11 events can be ignored
25 * so we have to utilize the Gdk error handler to avoid
26 * false alarms in Gtk3.
27 */
28 static void
GdkErrorHandler(const gchar * log_domain,GLogLevelFlags log_level,const gchar * message,gpointer user_data)29 GdkErrorHandler(const gchar *log_domain, GLogLevelFlags log_level,
30 const gchar *message, gpointer user_data)
31 {
32 if (strstr(message, "X Window System error")) {
33 XErrorEvent event;
34 nsDependentCString buffer(message);
35 char *endptr;
36
37 /* Parse Gdk X Window error message which has this format:
38 * (Details: serial XXXX error_code XXXX request_code XXXX (XXXX) minor_code XXXX)
39 */
40 NS_NAMED_LITERAL_CSTRING(serialString, "(Details: serial ");
41 int32_t start = buffer.Find(serialString);
42 if (start == kNotFound)
43 NS_RUNTIMEABORT(message);
44
45 start += serialString.Length();
46 errno = 0;
47 event.serial = strtol(buffer.BeginReading() + start, &endptr, 10);
48 if (errno)
49 NS_RUNTIMEABORT(message);
50
51 NS_NAMED_LITERAL_CSTRING(errorCodeString, " error_code ");
52 if (!StringBeginsWith(Substring(endptr, buffer.EndReading()), errorCodeString))
53 NS_RUNTIMEABORT(message);
54
55 errno = 0;
56 event.error_code = strtol(endptr + errorCodeString.Length(), &endptr, 10);
57 if (errno)
58 NS_RUNTIMEABORT(message);
59
60 NS_NAMED_LITERAL_CSTRING(requestCodeString, " request_code ");
61 if (!StringBeginsWith(Substring(endptr, buffer.EndReading()), requestCodeString))
62 NS_RUNTIMEABORT(message);
63
64 errno = 0;
65 event.request_code = strtol(endptr + requestCodeString.Length(), &endptr, 10);
66 if (errno)
67 NS_RUNTIMEABORT(message);
68
69 NS_NAMED_LITERAL_CSTRING(minorCodeString, " minor_code ");
70 start = buffer.Find(minorCodeString, endptr - buffer.BeginReading());
71 if (!start)
72 NS_RUNTIMEABORT(message);
73
74 errno = 0;
75 event.minor_code = strtol(buffer.BeginReading() + start + minorCodeString.Length(), nullptr, 10);
76 if (errno)
77 NS_RUNTIMEABORT(message);
78
79 event.display = GDK_DISPLAY_XDISPLAY(gdk_display_get_default());
80 // Gdk does not provide resource ID
81 event.resourceid = 0;
82
83 X11Error(event.display, &event);
84 } else {
85 g_log_default_handler(log_domain, log_level, message, user_data);
86 NS_RUNTIMEABORT(message);
87 }
88 }
89
90 void
InstallGdkErrorHandler()91 InstallGdkErrorHandler()
92 {
93 g_log_set_handler("Gdk",
94 (GLogLevelFlags)(G_LOG_LEVEL_ERROR | G_LOG_FLAG_FATAL | G_LOG_FLAG_RECURSION),
95 GdkErrorHandler,
96 nullptr);
97 if (PR_GetEnv("MOZ_X_SYNC")) {
98 XSynchronize(GDK_DISPLAY_XDISPLAY(gdk_display_get_default()), True);
99 }
100 }
101