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Diffstat (limited to 'application/basilisk/modules/ProcessHangMonitor.jsm')
| -rw-r--r-- | application/basilisk/modules/ProcessHangMonitor.jsm | 398 |
1 files changed, 0 insertions, 398 deletions
diff --git a/application/basilisk/modules/ProcessHangMonitor.jsm b/application/basilisk/modules/ProcessHangMonitor.jsm deleted file mode 100644 index b64d2308a6..0000000000 --- a/application/basilisk/modules/ProcessHangMonitor.jsm +++ /dev/null @@ -1,398 +0,0 @@ -/* -*- mode: js; indent-tabs-mode: nil; js-indent-level: 2 -*- */ -/* 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/. */ - -"use strict"; - -var Cc = Components.classes; -var Ci = Components.interfaces; -var Cu = Components.utils; - -this.EXPORTED_SYMBOLS = ["ProcessHangMonitor"]; - -Cu.import("resource://gre/modules/Services.jsm"); - -/** - * This JSM is responsible for observing content process hang reports - * and asking the user what to do about them. See nsIHangReport for - * the platform interface. - */ - -var ProcessHangMonitor = { - /** - * This timeout is the wait period applied after a user selects "Wait" in - * an existing notification. - */ - get WAIT_EXPIRATION_TIME() { - try { - return Services.prefs.getIntPref("browser.hangNotification.waitPeriod"); - } catch (ex) { - return 10000; - } - }, - - /** - * Collection of hang reports that haven't expired or been dismissed - * by the user. These are nsIHangReports. - */ - _activeReports: new Set(), - - /** - * Collection of hang reports that have been suppressed for a short - * period of time. Value is an nsITimer for when the wait time - * expires. - */ - _pausedReports: new Map(), - - /** - * Initialize hang reporting. Called once in the parent process. - */ - init() { - Services.obs.addObserver(this, "process-hang-report", false); - Services.obs.addObserver(this, "clear-hang-report", false); - Services.obs.addObserver(this, "xpcom-shutdown", false); - Services.ww.registerNotification(this); - }, - - /** - * Terminate JavaScript associated with the hang being reported for - * the selected browser in |win|. - */ - terminateScript(win) { - this.handleUserInput(win, report => report.terminateScript()); - }, - - /** - * Start devtools debugger for JavaScript associated with the hang - * being reported for the selected browser in |win|. - */ - debugScript(win) { - this.handleUserInput(win, report => { - function callback() { - report.endStartingDebugger(); - } - - report.beginStartingDebugger(); - - let svc = Cc["@mozilla.org/dom/slow-script-debug;1"].getService(Ci.nsISlowScriptDebug); - let handler = svc.remoteActivationHandler; - handler.handleSlowScriptDebug(report.scriptBrowser, callback); - }); - }, - - /** - * Terminate the plugin process associated with a hang being reported - * for the selected browser in |win|. Will attempt to generate a combined - * crash report for all processes. - */ - terminatePlugin(win) { - this.handleUserInput(win, report => report.terminatePlugin()); - }, - - /** - * Dismiss the browser notification and invoke an appropriate action based on - * the hang type. - */ - stopIt(win) { - let report = this.findActiveReport(win.gBrowser.selectedBrowser); - if (!report) { - return; - } - - switch (report.hangType) { - case report.SLOW_SCRIPT: - this.terminateScript(win); - break; - case report.PLUGIN_HANG: - this.terminatePlugin(win); - break; - } - }, - - /** - * Dismiss the notification, clear the report from the active list and set up - * a new timer to track a wait period during which we won't notify. - */ - waitLonger(win) { - let report = this.findActiveReport(win.gBrowser.selectedBrowser); - if (!report) { - return; - } - // Remove the report from the active list. - this.removeActiveReport(report); - - // NOTE, we didn't call userCanceled on nsIHangReport here. This insures - // we don't repeatedly generate and cache crash report data for this hang - // in the process hang reporter. It already has one report for the browser - // process we want it hold onto. - - // Create a new wait timer with notify callback - let timer = Cc["@mozilla.org/timer;1"].createInstance(Ci.nsITimer); - timer.initWithCallback(() => { - for (let [stashedReport, otherTimer] of this._pausedReports) { - if (otherTimer === timer) { - this.removePausedReport(stashedReport); - - // We're still hung, so move the report back to the active - // list and update the UI. - this._activeReports.add(report); - this.updateWindows(); - break; - } - } - }, this.WAIT_EXPIRATION_TIME, timer.TYPE_ONE_SHOT); - - this._pausedReports.set(report, timer); - - // remove the browser notification associated with this hang - this.updateWindows(); - }, - - /** - * If there is a hang report associated with the selected browser in - * |win|, invoke |func| on that report and stop notifying the user - * about it. - */ - handleUserInput(win, func) { - let report = this.findActiveReport(win.gBrowser.selectedBrowser); - if (!report) { - return null; - } - this.removeActiveReport(report); - - return func(report); - }, - - observe(subject, topic, data) { - switch (topic) { - case "xpcom-shutdown": - Services.obs.removeObserver(this, "xpcom-shutdown"); - Services.obs.removeObserver(this, "process-hang-report"); - Services.obs.removeObserver(this, "clear-hang-report"); - Services.ww.unregisterNotification(this); - break; - - case "process-hang-report": - this.reportHang(subject.QueryInterface(Ci.nsIHangReport)); - break; - - case "clear-hang-report": - this.clearHang(subject.QueryInterface(Ci.nsIHangReport)); - break; - - case "domwindowopened": - // Install event listeners on the new window in case one of - // its tabs is already hung. - let win = subject.QueryInterface(Ci.nsIDOMWindow); - let listener = (ev) => { - win.removeEventListener("load", listener, true); - this.updateWindows(); - }; - win.addEventListener("load", listener, true); - break; - } - }, - - /** - * Find a active hang report for the given <browser> element. - */ - findActiveReport(browser) { - let frameLoader = browser.QueryInterface(Ci.nsIFrameLoaderOwner).frameLoader; - for (let report of this._activeReports) { - if (report.isReportForBrowser(frameLoader)) { - return report; - } - } - return null; - }, - - /** - * Find a paused hang report for the given <browser> element. - */ - findPausedReport(browser) { - let frameLoader = browser.QueryInterface(Ci.nsIFrameLoaderOwner).frameLoader; - for (let [report, ] of this._pausedReports) { - if (report.isReportForBrowser(frameLoader)) { - return report; - } - } - return null; - }, - - /** - * Remove an active hang report from the active list and cancel the timer - * associated with it. - */ - removeActiveReport(report) { - this._activeReports.delete(report); - this.updateWindows(); - }, - - /** - * Remove a paused hang report from the paused list and cancel the timer - * associated with it. - */ - removePausedReport(report) { - let timer = this._pausedReports.get(report); - if (timer) { - timer.cancel(); - } - this._pausedReports.delete(report); - }, - - /** - * Iterate over all XUL windows and ensure that the proper hang - * reports are shown for each one. Also install event handlers in - * each window to watch for events that would cause a different hang - * report to be displayed. - */ - updateWindows() { - let e = Services.wm.getEnumerator("navigator:browser"); - while (e.hasMoreElements()) { - let win = e.getNext(); - - this.updateWindow(win); - - // Only listen for these events if there are active hang reports. - if (this._activeReports.size) { - this.trackWindow(win); - } else { - this.untrackWindow(win); - } - } - }, - - /** - * If there is a hang report for the current tab in |win|, display it. - */ - updateWindow(win) { - let report = this.findActiveReport(win.gBrowser.selectedBrowser); - - if (report) { - this.showNotification(win, report); - } else { - this.hideNotification(win); - } - }, - - /** - * Show the notification for a hang. - */ - showNotification(win, report) { - let nb = win.document.getElementById("high-priority-global-notificationbox"); - let notification = nb.getNotificationWithValue("process-hang"); - if (notification) { - return; - } - - let bundle = win.gNavigatorBundle; - - let buttons = [{ - label: bundle.getString("processHang.button_stop.label"), - accessKey: bundle.getString("processHang.button_stop.accessKey"), - callback() { - ProcessHangMonitor.stopIt(win); - } - }, - { - label: bundle.getString("processHang.button_wait.label"), - accessKey: bundle.getString("processHang.button_wait.accessKey"), - callback() { - ProcessHangMonitor.waitLonger(win); - } - }]; - -#ifdef MOZ_DEV_EDITION - if (report.hangType == report.SLOW_SCRIPT) { - buttons.push({ - label: bundle.getString("processHang.button_debug.label"), - accessKey: bundle.getString("processHang.button_debug.accessKey"), - callback() { - ProcessHangMonitor.debugScript(win); - } - }); - } -#endif - - nb.appendNotification(bundle.getString("processHang.label"), - "process-hang", - "chrome://browser/content/aboutRobots-icon.png", - nb.PRIORITY_WARNING_HIGH, buttons); - }, - - /** - * Ensure that no hang notifications are visible in |win|. - */ - hideNotification(win) { - let nb = win.document.getElementById("high-priority-global-notificationbox"); - let notification = nb.getNotificationWithValue("process-hang"); - if (notification) { - nb.removeNotification(notification); - } - }, - - /** - * Install event handlers on |win| to watch for events that would - * cause a different hang report to be displayed. - */ - trackWindow(win) { - win.gBrowser.tabContainer.addEventListener("TabSelect", this, true); - win.gBrowser.tabContainer.addEventListener("TabRemotenessChange", this, true); - }, - - untrackWindow(win) { - win.gBrowser.tabContainer.removeEventListener("TabSelect", this, true); - win.gBrowser.tabContainer.removeEventListener("TabRemotenessChange", this, true); - }, - - handleEvent(event) { - let win = event.target.ownerGlobal; - - // If a new tab is selected or if a tab changes remoteness, then - // we may need to show or hide a hang notification. - - if (event.type == "TabSelect" || event.type == "TabRemotenessChange") { - this.updateWindow(win); - } - }, - - /** - * Handle a potentially new hang report. If it hasn't been seen - * before, show a notification for it in all open XUL windows. - */ - reportHang(report) { - // If this hang was already reported reset the timer for it. - if (this._activeReports.has(report)) { - // if this report is in active but doesn't have a notification associated - // with it, display a notification. - this.updateWindows(); - return; - } - - // If this hang was already reported and paused by the user ignore it. - if (this._pausedReports.has(report)) { - return; - } - - // On e10s this counts slow-script/hanged-plugin notice only once. - // This code is not reached on non-e10s. - if (report.hangType == report.SLOW_SCRIPT) { - // On non-e10s, SLOW_SCRIPT_NOTICE_COUNT is probed at nsGlobalWindow.cpp - Services.telemetry.getHistogramById("SLOW_SCRIPT_NOTICE_COUNT").add(); - } else if (report.hangType == report.PLUGIN_HANG) { - // On non-e10s we have sufficient plugin telemetry probes, - // so PLUGIN_HANG_NOTICE_COUNT is only probed on e10s. - Services.telemetry.getHistogramById("PLUGIN_HANG_NOTICE_COUNT").add(); - } - - this._activeReports.add(report); - this.updateWindows(); - }, - - clearHang(report) { - this.removeActiveReport(report); - this.removePausedReport(report); - report.userCanceled(); - }, -}; |