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// This Source Code Form is subject to the terms of the Mozilla Public
// License, v. 2.0. If a copy of the MPL was not distributed with this
// file, You can obtain one at http://mozilla.org/MPL/2.0/.
this.EXPORTED_SYMBOLS = ["CompatWarning"];
const Ci = Components.interfaces;
const Cc = Components.classes;
const Cu = Components.utils;
Cu.import("resource://gre/modules/Services.jsm");
Cu.import("resource://gre/modules/XPCOMUtils.jsm");
Cu.import("resource://gre/modules/Preferences.jsm");
XPCOMUtils.defineLazyModuleGetter(this, "console",
"resource://gre/modules/Console.jsm");
function section(number, url)
{
const baseURL = "https://developer.mozilla.org/en-US/Firefox/Multiprocess_Firefox/Limitations_of_chrome_scripts";
return { number, url: baseURL + url };
}
var CompatWarning = {
// Sometimes we want to generate a warning, but put off issuing it
// until later. For example, if someone registers a listener, we
// might only want to warn about it if the listener actually
// fires. However, we want the warning to show a stack for the
// registration site.
delayedWarning: function(msg, addon, warning) {
function isShimLayer(filename) {
return filename.indexOf("CompatWarning.jsm") != -1 ||
filename.indexOf("RemoteAddonsParent.jsm") != -1 ||
filename.indexOf("RemoteAddonsChild.jsm") != -1 ||
filename.indexOf("multiprocessShims.js") != -1;
}
let stack = Components.stack;
while (stack && isShimLayer(stack.filename))
stack = stack.caller;
let alreadyWarned = false;
return function() {
if (alreadyWarned) {
return;
}
alreadyWarned = true;
if (addon) {
let histogram = Services.telemetry.getKeyedHistogramById("ADDON_SHIM_USAGE");
histogram.add(addon, warning ? warning.number : 0);
}
if (!Preferences.get("dom.ipc.shims.enabledWarnings", false))
return;
let error = Cc['@mozilla.org/scripterror;1'].createInstance(Ci.nsIScriptError);
if (!error || !Services.console) {
// Too late during shutdown to use the nsIConsole
return;
}
let message = `Warning: ${msg}`;
if (warning)
message += `\nMore info at: ${warning.url}`;
error.init(
/* message*/ message,
/* sourceName*/ stack ? stack.filename : "",
/* sourceLine*/ stack ? stack.sourceLine : "",
/* lineNumber*/ stack ? stack.lineNumber : 0,
/* columnNumber*/ 0,
/* flags*/ Ci.nsIScriptError.warningFlag,
/* category*/ "chrome javascript");
Services.console.logMessage(error);
if (Preferences.get("dom.ipc.shims.dumpWarnings", false)) {
dump(message + "\n");
while (stack) {
dump(stack + "\n");
stack = stack.caller;
}
dump("\n");
}
};
},
warn: function(msg, addon, warning) {
let delayed = this.delayedWarning(msg, addon, warning);
delayed();
},
warnings: {
content: section(1, "#gBrowser.contentWindow.2C_window.content..."),
limitations_of_CPOWs: section(2, "#Limitations_of_CPOWs"),
nsIContentPolicy: section(3, "#nsIContentPolicy"),
nsIWebProgressListener: section(4, "#nsIWebProgressListener"),
observers: section(5, "#Observers_in_the_chrome_process"),
DOM_events: section(6, "#DOM_Events"),
sandboxes: section(7, "#Sandboxes"),
JSMs: section(8, "#JavaScript_code_modules_(JSMs)"),
nsIAboutModule: section(9, "#nsIAboutModule"),
// If more than 14 values appear here, you need to change the
// ADDON_SHIM_USAGE histogram definition in Histograms.json.
},
};
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