зеркало из https://github.com/mozilla/pjs.git
206 строки
6.8 KiB
C++
206 строки
6.8 KiB
C++
/* -*- Mode: C++; tab-width: 40; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* ***** BEGIN LICENSE BLOCK *****
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* Version: MPL 1.1/GPL 2.0/LGPL 2.1
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*
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* The contents of this file are subject to the Mozilla Public License Version
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* 1.1 (the "License"); you may not use this file except in compliance with
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* the License. You may obtain a copy of the License at
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* http://www.mozilla.org/MPL/
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*
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* Software distributed under the License is distributed on an "AS IS" basis,
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* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
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* for the specific language governing rights and limitations under the
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* License.
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*
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* The Original Code is mozilla.org code.
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*
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* The Initial Developer of the Original Code is
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* the Mozilla Foundation <http://www.mozilla.org/>
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* Portions created by the Initial Developer are Copyright (C) 2010
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* the Initial Developer. All Rights Reserved.
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*
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* Contributor(s):
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* Karl Tomlinson <karlt+@karlt.net>
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*
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* Alternatively, the contents of this file may be used under the terms of
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* either the GNU General Public License Version 2 or later (the "GPL"), or
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* the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
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* in which case the provisions of the GPL or the LGPL are applicable instead
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* of those above. If you wish to allow use of your version of this file only
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* under the terms of either the GPL or the LGPL, and not to allow others to
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* use your version of this file under the terms of the MPL, indicate your
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* decision by deleting the provisions above and replace them with the notice
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* and other provisions required by the GPL or the LGPL. If you do not delete
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* the provisions above, a recipient may use your version of this file under
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* the terms of any one of the MPL, the GPL or the LGPL.
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*
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* ***** END LICENSE BLOCK ***** */
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#include "nsX11ErrorHandler.h"
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#ifdef MOZ_IPC
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#include "mozilla/plugins/PluginProcessChild.h"
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using mozilla::plugins::PluginProcessChild;
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#endif
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#include "prenv.h"
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#include "nsXULAppAPI.h"
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#include "nsExceptionHandler.h"
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#include "nsDebug.h"
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#include "mozilla/X11Util.h"
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#include <X11/Xlib.h>
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#define BUFSIZE 2048 // What Xlib uses with XGetErrorDatabaseText
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extern "C" {
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static int
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IgnoreError(Display *display, XErrorEvent *event) {
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return 0; // This return value is ignored.
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}
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static int
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X11Error(Display *display, XErrorEvent *event) {
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nsCAutoString notes;
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char buffer[BUFSIZE];
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// Get an indication of how long ago the request that caused the error was
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// made. Do this before querying extensions etc below.
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unsigned long age = NextRequest(display) - event->serial;
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// Ignore subsequent errors, which may get processed during the extension
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// queries below for example.
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XSetErrorHandler(IgnoreError);
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// Get a string to represent the request that caused the error.
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nsCAutoString message;
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if (event->request_code < 128) {
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// Core protocol request
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message.AppendInt(event->request_code);
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} else {
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// Extension request
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int nExts;
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char** extNames = XListExtensions(display, &nExts);
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if (extNames) {
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for (int i = 0; i < nExts; ++i) {
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int major_opcode, first_event, first_error;
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if (XQueryExtension(display, extNames[i],
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&major_opcode, &first_event, &first_error)
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&& major_opcode == event->request_code) {
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message.Append(extNames[i]);
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message.Append('.');
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message.AppendInt(event->minor_code);
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break;
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}
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}
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XFreeExtensionList(extNames);
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}
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}
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if (message.IsEmpty()) {
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buffer[0] = '\0';
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} else {
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XGetErrorDatabaseText(display, "XRequest", message.get(), "",
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buffer, sizeof(buffer));
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}
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if (buffer[0]) {
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notes.Append(buffer);
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} else {
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notes.Append("Request ");
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notes.AppendInt(event->request_code);
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notes.Append('.');
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notes.AppendInt(event->minor_code);
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}
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notes.Append(": ");
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// Get a string to describe the error.
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XGetErrorText(display, event->error_code, buffer, sizeof(buffer));
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notes.Append(buffer);
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// For requests where Xlib gets the reply synchronously, |age| will be 1
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// and the stack will include the function making the request. For
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// asynchronous requests, the current stack will often be unrelated to the
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// point of making the request, even if |age| is 1, but sometimes this may
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// help us count back to the point of the request. With XSynchronize on,
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// the stack will include the function making the request, even though
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// |age| will be 2 for asynchronous requests because XSynchronize is
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// implemented by an empty request from an XSync, which has not yet been
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// processed.
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if (age > 1) {
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// XSynchronize returns the previous "after function". If a second
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// XSynchronize call returns the same function after an enable call then
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// synchronization must have already been enabled.
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if (XSynchronize(display, True) == XSynchronize(display, False)) {
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notes.Append("; sync");
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} else {
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notes.Append("; ");
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notes.AppendInt(PRUint32(age));
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notes.Append(" requests ago");
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}
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}
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#ifdef MOZ_CRASHREPORTER
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switch (XRE_GetProcessType()) {
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case GeckoProcessType_Default:
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CrashReporter::AppendAppNotesToCrashReport(notes);
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break;
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#ifdef MOZ_IPC
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case GeckoProcessType_Plugin:
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if (CrashReporter::GetEnabled()) {
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// This is assuming that X operations are performed on the plugin
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// thread. If plugins are using X on another thread, then we'll need to
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// handle that differently.
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PluginProcessChild::AppendNotesToCrashReport(notes);
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}
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break;
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#endif
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default:
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; // crash report notes not supported.
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}
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#endif
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#ifdef DEBUG
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// The resource id is unlikely to be useful in a crash report without
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// context of other ids, but add it to the debug console output.
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notes.Append("; id=0x");
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notes.AppendInt(PRUint32(event->resourceid), 16);
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#ifdef MOZ_X11
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// Actually, for requests where Xlib gets the reply synchronously,
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// MOZ_X_SYNC=1 will not be necessary, but we don't have a table to tell us
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// which requests get a synchronous reply.
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if (!PR_GetEnv("MOZ_X_SYNC")) {
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notes.Append("\nRe-running with MOZ_X_SYNC=1 in the environment may give a more helpful backtrace.");
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}
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#endif
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#endif
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#ifdef MOZ_WIDGET_QT
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// We should not abort here if MOZ_X_SYNC is not set
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// until http://bugreports.qt.nokia.com/browse/QTBUG-4042
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// not fixed, just print error value
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if (!PR_GetEnv("MOZ_X_SYNC")) {
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fprintf(stderr, "XError: %s\n", notes.get());
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return 0; // temporary workaround for bug 161472
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}
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#endif
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NS_RUNTIMEABORT(notes.get());
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return 0; // not reached
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}
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}
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void
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InstallX11ErrorHandler()
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{
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XSetErrorHandler(X11Error);
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Display *display = mozilla::DefaultXDisplay();
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NS_ASSERTION(display, "No X display");
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if (PR_GetEnv("MOZ_X_SYNC")) {
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XSynchronize(display, True);
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}
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}
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