Linux: Catch X errors and force a crash....

app/x11_util.cc

 // Copyright (c) 2010 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 // This file defines utility functions for X11 (Linux only). This code has been
 // ported from XCB since we can't use XCB on Ubuntu while its 32-bit support
 // remains woefully incomplete.
 
 #include "app/x11_util.h"
 
@@ skipping 34 matching lines @@
 CachedPictFormats* get_cached_pict_formats() {
   static CachedPictFormats* formats = NULL;
   if (!formats)
     formats = new CachedPictFormats();
   return formats;
 }
 
 // Maximum number of CachedPictFormats we keep around.
 const size_t kMaxCacheSize = 5;
 
+int X11ErrorHandler(Display* d, XErrorEvent* e) {
+  LOG(FATAL) << "X Error detected: serial " << e->serial
+             << " error_code " << static_cast<unsigned int>(e->error_code)
+             << " request_code " << static_cast<unsigned int>(e->request_code)
+             << " minor_code " << static_cast<unsigned int>(e->minor_code);
+  return 0;
+}
+
+int X11IOErrorHandler(Display* d) {
+  LOG(FATAL) << "X IO Error detected";
+  return 0;
+}
+
 }  // namespace
 
+void SetX11ErrorHandlers() {
+  XSetErrorHandler(X11ErrorHandler);
+  XSetIOErrorHandler(X11IOErrorHandler);
+}
+
 bool XDisplayExists() {
   return (gdk_display_get_default() != NULL);
 }
 
 Display* GetXDisplay() {
   static Display* display = NULL;
 
   if (!display)
     display = gdk_x11_get_default_xdisplay();
 
@@ skipping 713 matching lines @@
   event.xclient.format = 32;
   event.xclient.data.l[0] = desktop;
   event.xclient.data.l[1] = 1;  // source indication
 
   int result = XSendEvent(GetXDisplay(), GetX11RootWindow(), False,
                           SubstructureNotifyMask, &event);
   return result == Success;
 }
 
 }  // namespace x11_util