mirror of
https://github.com/mozilla/gecko-dev.git
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1279 lines
33 KiB
C++
1279 lines
33 KiB
C++
/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* vim: set ts=8 sts=2 et sw=2 tw=80: */
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/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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#include "mozilla/ProcessHangMonitor.h"
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#include "mozilla/ProcessHangMonitorIPC.h"
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#include "jsapi.h"
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#include "js/GCAPI.h"
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#include "mozilla/Atomics.h"
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#include "mozilla/BackgroundHangMonitor.h"
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#include "mozilla/dom/ContentParent.h"
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#include "mozilla/dom/Element.h"
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#include "mozilla/dom/ScriptSettings.h"
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#include "mozilla/dom/TabChild.h"
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#include "mozilla/dom/TabParent.h"
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#include "mozilla/Monitor.h"
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#include "mozilla/plugins/PluginBridge.h"
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#include "mozilla/Preferences.h"
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#include "mozilla/Unused.h"
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#include "nsIFrameLoader.h"
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#include "nsIHangReport.h"
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#include "nsITabParent.h"
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#include "nsPluginHost.h"
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#include "nsThreadUtils.h"
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#ifdef MOZ_CRASHREPORTER
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#include "nsExceptionHandler.h"
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#endif
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#include "base/task.h"
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#include "base/thread.h"
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#ifdef XP_WIN
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// For IsDebuggerPresent()
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#include <windows.h>
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#endif
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using namespace mozilla;
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using namespace mozilla::dom;
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/*
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* Basic architecture:
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*
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* Each process has its own ProcessHangMonitor singleton. This singleton exists
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* as long as there is at least one content process in the system. Each content
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* process has a HangMonitorChild and the chrome process has one
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* HangMonitorParent per process. Each process (including the chrome process)
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* runs a hang monitoring thread. The PHangMonitor actors are bound to this
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* thread so that they never block on the main thread.
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*
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* When the content process detects a hang, it posts a task to its hang thread,
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* which sends an IPC message to the hang thread in the parent. The parent
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* cancels any ongoing CPOW requests and then posts a runnable to the main
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* thread that notifies Firefox frontend code of the hang. The frontend code is
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* passed an nsIHangReport, which can be used to terminate the hang.
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*
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* If the user chooses to terminate a script, a task is posted to the chrome
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* process's hang monitoring thread, which sends an IPC message to the hang
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* thread in the content process. That thread sets a flag to indicate that JS
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* execution should be terminated the next time it hits the interrupt
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* callback. A similar scheme is used for debugging slow scripts. If a content
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* process or plug-in needs to be terminated, the chrome process does so
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* directly, without messaging the content process.
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*/
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namespace {
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/* Child process objects */
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class HangMonitorChild
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: public PProcessHangMonitorChild
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{
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public:
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explicit HangMonitorChild(ProcessHangMonitor* aMonitor);
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~HangMonitorChild() override;
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void Open(Transport* aTransport, ProcessId aOtherPid,
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MessageLoop* aIOLoop);
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typedef ProcessHangMonitor::SlowScriptAction SlowScriptAction;
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SlowScriptAction NotifySlowScript(nsITabChild* aTabChild,
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const char* aFileName,
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unsigned aLineNo);
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void NotifySlowScriptAsync(TabId aTabId,
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const nsCString& aFileName,
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unsigned aLineNo);
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bool IsDebuggerStartupComplete();
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void NotifyPluginHang(uint32_t aPluginId);
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void NotifyPluginHangAsync(uint32_t aPluginId);
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void ClearHang();
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void ClearHangAsync();
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void ClearForcePaint();
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mozilla::ipc::IPCResult RecvTerminateScript() override;
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mozilla::ipc::IPCResult RecvBeginStartingDebugger() override;
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mozilla::ipc::IPCResult RecvEndStartingDebugger() override;
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mozilla::ipc::IPCResult RecvForcePaint(const TabId& aTabId, const uint64_t& aLayerObserverEpoch) override;
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void ActorDestroy(ActorDestroyReason aWhy) override;
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void InterruptCallback();
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void Shutdown();
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static HangMonitorChild* Get() { return sInstance; }
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MessageLoop* MonitorLoop() { return mHangMonitor->MonitorLoop(); }
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private:
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void ShutdownOnThread();
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static Atomic<HangMonitorChild*> sInstance;
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UniquePtr<BackgroundHangMonitor> mForcePaintMonitor;
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const RefPtr<ProcessHangMonitor> mHangMonitor;
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Monitor mMonitor;
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// Main thread-only.
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bool mSentReport;
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// These fields must be accessed with mMonitor held.
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bool mTerminateScript;
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bool mStartDebugger;
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bool mFinishedStartingDebugger;
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bool mForcePaint;
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TabId mForcePaintTab;
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MOZ_INIT_OUTSIDE_CTOR uint64_t mForcePaintEpoch;
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JSContext* mContext;
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bool mShutdownDone;
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// This field is only accessed on the hang thread.
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bool mIPCOpen;
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};
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Atomic<HangMonitorChild*> HangMonitorChild::sInstance;
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/* Parent process objects */
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class HangMonitorParent;
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class HangMonitoredProcess final
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: public nsIHangReport
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{
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public:
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NS_DECL_THREADSAFE_ISUPPORTS
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HangMonitoredProcess(HangMonitorParent* aActor,
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ContentParent* aContentParent)
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: mActor(aActor), mContentParent(aContentParent) {}
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NS_IMETHOD GetHangType(uint32_t* aHangType) override;
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NS_IMETHOD GetScriptBrowser(nsIDOMElement** aBrowser) override;
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NS_IMETHOD GetScriptFileName(nsACString& aFileName) override;
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NS_IMETHOD GetScriptLineNo(uint32_t* aLineNo) override;
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NS_IMETHOD GetPluginName(nsACString& aPluginName) override;
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NS_IMETHOD TerminateScript() override;
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NS_IMETHOD BeginStartingDebugger() override;
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NS_IMETHOD EndStartingDebugger() override;
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NS_IMETHOD TerminatePlugin() override;
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NS_IMETHOD UserCanceled() override;
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NS_IMETHOD IsReportForBrowser(nsIFrameLoader* aFrameLoader, bool* aResult) override;
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// Called when a content process shuts down.
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void Clear() {
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mContentParent = nullptr;
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mActor = nullptr;
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}
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/**
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* Sets the information associated with this hang: this includes the ID of
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* the plugin which caused the hang as well as the content PID. The ID of
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* a minidump taken during the hang can also be provided.
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*
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* @param aHangData The hang information
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* @param aDumpId The ID of a minidump taken when the hang occurred
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*/
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void SetHangData(const HangData& aHangData, const nsAString& aDumpId) {
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mHangData = aHangData;
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mDumpId = aDumpId;
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}
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void ClearHang() {
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mHangData = HangData();
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mDumpId.Truncate();
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}
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private:
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~HangMonitoredProcess() = default;
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// Everything here is main thread-only.
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HangMonitorParent* mActor;
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ContentParent* mContentParent;
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HangData mHangData;
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nsAutoString mDumpId;
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};
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class HangMonitorParent
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: public PProcessHangMonitorParent
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{
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public:
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explicit HangMonitorParent(ProcessHangMonitor* aMonitor);
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~HangMonitorParent() override;
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void Open(Transport* aTransport, ProcessId aPid, MessageLoop* aIOLoop);
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mozilla::ipc::IPCResult RecvHangEvidence(const HangData& aHangData) override;
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mozilla::ipc::IPCResult RecvClearHang() override;
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void ActorDestroy(ActorDestroyReason aWhy) override;
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void SetProcess(HangMonitoredProcess* aProcess) { mProcess = aProcess; }
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void Shutdown();
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void ForcePaint(dom::TabParent* aTabParent, uint64_t aLayerObserverEpoch);
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void TerminateScript();
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void BeginStartingDebugger();
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void EndStartingDebugger();
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void CleanupPluginHang(uint32_t aPluginId, bool aRemoveFiles);
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/**
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* Update the dump for the specified plugin. This method is thread-safe and
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* is used to replace a browser minidump with a full minidump. If aDumpId is
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* empty this is a no-op.
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*/
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void UpdateMinidump(uint32_t aPluginId, const nsString& aDumpId);
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MessageLoop* MonitorLoop() { return mHangMonitor->MonitorLoop(); }
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private:
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bool TakeBrowserMinidump(const PluginHangData& aPhd, nsString& aCrashId);
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void ForcePaintOnThread(TabId aTabId, uint64_t aLayerObserverEpoch);
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void ShutdownOnThread();
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const RefPtr<ProcessHangMonitor> mHangMonitor;
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// This field is read-only after construction.
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bool mReportHangs;
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// This field is only accessed on the hang thread.
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bool mIPCOpen;
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Monitor mMonitor;
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// Must be accessed with mMonitor held.
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RefPtr<HangMonitoredProcess> mProcess;
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bool mShutdownDone;
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// Map from plugin ID to crash dump ID. Protected by mBrowserCrashDumpHashLock.
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nsDataHashtable<nsUint32HashKey, nsString> mBrowserCrashDumpIds;
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Mutex mBrowserCrashDumpHashLock;
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};
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} // namespace
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/* HangMonitorChild implementation */
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HangMonitorChild::HangMonitorChild(ProcessHangMonitor* aMonitor)
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: mHangMonitor(aMonitor),
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mMonitor("HangMonitorChild lock"),
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mSentReport(false),
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mTerminateScript(false),
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mStartDebugger(false),
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mFinishedStartingDebugger(false),
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mForcePaint(false),
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mShutdownDone(false),
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mIPCOpen(true)
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{
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MOZ_RELEASE_ASSERT(NS_IsMainThread());
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mContext = danger::GetJSContext();
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mForcePaintMonitor =
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MakeUnique<mozilla::BackgroundHangMonitor>("Gecko_Child_ForcePaint",
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128, /* ms timeout for microhangs */
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8192 /* ms timeout for permahangs */,
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BackgroundHangMonitor::THREAD_PRIVATE);
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}
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HangMonitorChild::~HangMonitorChild()
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{
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MOZ_RELEASE_ASSERT(NS_IsMainThread());
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MOZ_ASSERT(sInstance == this);
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mForcePaintMonitor = nullptr;
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sInstance = nullptr;
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}
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void
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HangMonitorChild::InterruptCallback()
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{
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MOZ_RELEASE_ASSERT(NS_IsMainThread());
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bool forcePaint;
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TabId forcePaintTab;
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uint64_t forcePaintEpoch;
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{
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MonitorAutoLock lock(mMonitor);
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forcePaint = mForcePaint;
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forcePaintTab = mForcePaintTab;
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forcePaintEpoch = mForcePaintEpoch;
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mForcePaint = false;
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}
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if (forcePaint) {
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RefPtr<TabChild> tabChild = TabChild::FindTabChild(forcePaintTab);
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if (tabChild) {
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JS::AutoAssertNoGC nogc(mContext);
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JS::AutoAssertOnBarrier nobarrier(mContext);
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tabChild->ForcePaint(forcePaintEpoch);
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}
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}
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}
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void
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HangMonitorChild::Shutdown()
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{
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MOZ_RELEASE_ASSERT(NS_IsMainThread());
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MonitorAutoLock lock(mMonitor);
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while (!mShutdownDone) {
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mMonitor.Wait();
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}
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}
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void
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HangMonitorChild::ShutdownOnThread()
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{
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MOZ_RELEASE_ASSERT(MessageLoop::current() == MonitorLoop());
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MonitorAutoLock lock(mMonitor);
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mShutdownDone = true;
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mMonitor.Notify();
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}
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void
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HangMonitorChild::ActorDestroy(ActorDestroyReason aWhy)
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{
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MOZ_RELEASE_ASSERT(MessageLoop::current() == MonitorLoop());
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mIPCOpen = false;
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// We use a task here to ensure that IPDL is finished with this
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// HangMonitorChild before it gets deleted on the main thread.
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MonitorLoop()->PostTask(NewNonOwningRunnableMethod(this, &HangMonitorChild::ShutdownOnThread));
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}
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mozilla::ipc::IPCResult
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HangMonitorChild::RecvTerminateScript()
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{
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MOZ_RELEASE_ASSERT(MessageLoop::current() == MonitorLoop());
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MonitorAutoLock lock(mMonitor);
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mTerminateScript = true;
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return IPC_OK();
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}
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mozilla::ipc::IPCResult
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HangMonitorChild::RecvBeginStartingDebugger()
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{
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MOZ_RELEASE_ASSERT(MessageLoop::current() == MonitorLoop());
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MonitorAutoLock lock(mMonitor);
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mStartDebugger = true;
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return IPC_OK();
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}
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mozilla::ipc::IPCResult
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HangMonitorChild::RecvEndStartingDebugger()
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{
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MOZ_RELEASE_ASSERT(MessageLoop::current() == MonitorLoop());
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MonitorAutoLock lock(mMonitor);
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mFinishedStartingDebugger = true;
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return IPC_OK();
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}
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mozilla::ipc::IPCResult
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HangMonitorChild::RecvForcePaint(const TabId& aTabId, const uint64_t& aLayerObserverEpoch)
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{
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MOZ_RELEASE_ASSERT(MessageLoop::current() == MonitorLoop());
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mForcePaintMonitor->NotifyActivity();
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{
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MonitorAutoLock lock(mMonitor);
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mForcePaint = true;
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mForcePaintTab = aTabId;
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mForcePaintEpoch = aLayerObserverEpoch;
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}
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JS_RequestInterruptCallback(mContext);
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JS::RequestGCInterruptCallback(mContext);
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return IPC_OK();
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}
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void
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HangMonitorChild::ClearForcePaint()
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{
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MOZ_RELEASE_ASSERT(NS_IsMainThread());
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MOZ_RELEASE_ASSERT(XRE_IsContentProcess());
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mForcePaintMonitor->NotifyWait();
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}
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void
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HangMonitorChild::Open(Transport* aTransport, ProcessId aPid,
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MessageLoop* aIOLoop)
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{
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MOZ_RELEASE_ASSERT(MessageLoop::current() == MonitorLoop());
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MOZ_ASSERT(!sInstance);
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sInstance = this;
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DebugOnly<bool> ok = PProcessHangMonitorChild::Open(aTransport, aPid, aIOLoop);
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MOZ_ASSERT(ok);
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}
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void
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HangMonitorChild::NotifySlowScriptAsync(TabId aTabId,
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const nsCString& aFileName,
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unsigned aLineNo)
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{
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if (mIPCOpen) {
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Unused << SendHangEvidence(SlowScriptData(aTabId, aFileName, aLineNo));
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}
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}
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HangMonitorChild::SlowScriptAction
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HangMonitorChild::NotifySlowScript(nsITabChild* aTabChild,
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const char* aFileName,
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unsigned aLineNo)
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{
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MOZ_RELEASE_ASSERT(NS_IsMainThread());
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mSentReport = true;
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{
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MonitorAutoLock lock(mMonitor);
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if (mTerminateScript) {
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mTerminateScript = false;
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return SlowScriptAction::Terminate;
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}
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if (mStartDebugger) {
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mStartDebugger = false;
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return SlowScriptAction::StartDebugger;
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}
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}
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TabId id;
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if (aTabChild) {
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RefPtr<TabChild> tabChild = static_cast<TabChild*>(aTabChild);
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id = tabChild->GetTabId();
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}
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nsAutoCString filename(aFileName);
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MonitorLoop()->PostTask(NewNonOwningRunnableMethod
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<TabId, nsCString, unsigned>(this,
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&HangMonitorChild::NotifySlowScriptAsync,
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id, filename, aLineNo));
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return SlowScriptAction::Continue;
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}
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bool
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HangMonitorChild::IsDebuggerStartupComplete()
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{
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MOZ_RELEASE_ASSERT(NS_IsMainThread());
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MonitorAutoLock lock(mMonitor);
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if (mFinishedStartingDebugger) {
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mFinishedStartingDebugger = false;
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return true;
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}
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return false;
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}
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void
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HangMonitorChild::NotifyPluginHang(uint32_t aPluginId)
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{
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// main thread in the child
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MOZ_RELEASE_ASSERT(NS_IsMainThread());
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mSentReport = true;
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// bounce to background thread
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MonitorLoop()->PostTask(NewNonOwningRunnableMethod<uint32_t>(this,
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&HangMonitorChild::NotifyPluginHangAsync,
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aPluginId));
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}
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void
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HangMonitorChild::NotifyPluginHangAsync(uint32_t aPluginId)
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{
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MOZ_RELEASE_ASSERT(MessageLoop::current() == MonitorLoop());
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// bounce back to parent on background thread
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if (mIPCOpen) {
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Unused << SendHangEvidence(PluginHangData(aPluginId,
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base::GetCurrentProcId()));
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}
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}
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void
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HangMonitorChild::ClearHang()
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{
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MOZ_ASSERT(NS_IsMainThread());
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if (mSentReport) {
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// bounce to background thread
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MonitorLoop()->PostTask(NewNonOwningRunnableMethod(this, &HangMonitorChild::ClearHangAsync));
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MonitorAutoLock lock(mMonitor);
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mSentReport = false;
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mTerminateScript = false;
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mStartDebugger = false;
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mFinishedStartingDebugger = false;
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}
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}
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void
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HangMonitorChild::ClearHangAsync()
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{
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MOZ_RELEASE_ASSERT(MessageLoop::current() == MonitorLoop());
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// bounce back to parent on background thread
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if (mIPCOpen) {
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Unused << SendClearHang();
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}
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}
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/* HangMonitorParent implementation */
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HangMonitorParent::HangMonitorParent(ProcessHangMonitor* aMonitor)
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: mHangMonitor(aMonitor),
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mIPCOpen(true),
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mMonitor("HangMonitorParent lock"),
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mShutdownDone(false),
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mBrowserCrashDumpHashLock("mBrowserCrashDumpIds lock")
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{
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MOZ_RELEASE_ASSERT(NS_IsMainThread());
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mReportHangs = mozilla::Preferences::GetBool("dom.ipc.reportProcessHangs", false);
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}
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HangMonitorParent::~HangMonitorParent()
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{
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#ifdef MOZ_CRASHREPORTER
|
|
MutexAutoLock lock(mBrowserCrashDumpHashLock);
|
|
|
|
for (auto iter = mBrowserCrashDumpIds.Iter(); !iter.Done(); iter.Next()) {
|
|
nsString crashId = iter.UserData();
|
|
if (!crashId.IsEmpty()) {
|
|
CrashReporter::DeleteMinidumpFilesForID(crashId);
|
|
}
|
|
}
|
|
#endif
|
|
}
|
|
|
|
void
|
|
HangMonitorParent::Shutdown()
|
|
{
|
|
MOZ_RELEASE_ASSERT(NS_IsMainThread());
|
|
|
|
MonitorAutoLock lock(mMonitor);
|
|
|
|
if (mProcess) {
|
|
mProcess->Clear();
|
|
mProcess = nullptr;
|
|
}
|
|
|
|
MonitorLoop()->PostTask(NewNonOwningRunnableMethod(this,
|
|
&HangMonitorParent::ShutdownOnThread));
|
|
|
|
while (!mShutdownDone) {
|
|
mMonitor.Wait();
|
|
}
|
|
}
|
|
|
|
void
|
|
HangMonitorParent::ShutdownOnThread()
|
|
{
|
|
MOZ_RELEASE_ASSERT(MessageLoop::current() == MonitorLoop());
|
|
|
|
// mIPCOpen is only written from this thread, so need need to take the lock
|
|
// here. We'd be shooting ourselves in the foot, because ActorDestroy takes
|
|
// it.
|
|
if (mIPCOpen) {
|
|
Close();
|
|
}
|
|
|
|
MonitorAutoLock lock(mMonitor);
|
|
mShutdownDone = true;
|
|
mMonitor.Notify();
|
|
}
|
|
|
|
void
|
|
HangMonitorParent::ForcePaint(dom::TabParent* aTab, uint64_t aLayerObserverEpoch)
|
|
{
|
|
MOZ_RELEASE_ASSERT(NS_IsMainThread());
|
|
TabId id = aTab->GetTabId();
|
|
MonitorLoop()->PostTask(NewNonOwningRunnableMethod<TabId, uint64_t>(
|
|
this, &HangMonitorParent::ForcePaintOnThread, id, aLayerObserverEpoch));
|
|
}
|
|
|
|
void
|
|
HangMonitorParent::ForcePaintOnThread(TabId aTabId, uint64_t aLayerObserverEpoch)
|
|
{
|
|
MOZ_RELEASE_ASSERT(MessageLoop::current() == MonitorLoop());
|
|
|
|
if (mIPCOpen) {
|
|
Unused << SendForcePaint(aTabId, aLayerObserverEpoch);
|
|
}
|
|
}
|
|
|
|
void
|
|
HangMonitorParent::ActorDestroy(ActorDestroyReason aWhy)
|
|
{
|
|
MOZ_RELEASE_ASSERT(MessageLoop::current() == MonitorLoop());
|
|
mIPCOpen = false;
|
|
}
|
|
|
|
void
|
|
HangMonitorParent::Open(Transport* aTransport, ProcessId aPid,
|
|
MessageLoop* aIOLoop)
|
|
{
|
|
MOZ_RELEASE_ASSERT(MessageLoop::current() == MonitorLoop());
|
|
|
|
DebugOnly<bool> ok = PProcessHangMonitorParent::Open(aTransport, aPid, aIOLoop);
|
|
MOZ_ASSERT(ok);
|
|
}
|
|
|
|
class HangObserverNotifier final : public Runnable
|
|
{
|
|
public:
|
|
HangObserverNotifier(HangMonitoredProcess* aProcess,
|
|
HangMonitorParent *aParent,
|
|
const HangData& aHangData,
|
|
const nsString& aBrowserDumpId,
|
|
bool aTakeMinidump)
|
|
: mProcess(aProcess),
|
|
mParent(aParent),
|
|
mHangData(aHangData),
|
|
mBrowserDumpId(aBrowserDumpId),
|
|
mTakeMinidump(aTakeMinidump)
|
|
{}
|
|
|
|
NS_IMETHOD
|
|
Run() override
|
|
{
|
|
// chrome process, main thread
|
|
MOZ_RELEASE_ASSERT(NS_IsMainThread());
|
|
|
|
nsString dumpId;
|
|
if ((mHangData.type() == HangData::TPluginHangData) && mTakeMinidump) {
|
|
// We've been handed a partial minidump; complete it with plugin and
|
|
// content process dumps.
|
|
const PluginHangData& phd = mHangData.get_PluginHangData();
|
|
plugins::TakeFullMinidump(phd.pluginId(), phd.contentProcessId(),
|
|
mBrowserDumpId, dumpId);
|
|
mParent->UpdateMinidump(phd.pluginId(), dumpId);
|
|
} else {
|
|
// We already have a full minidump; go ahead and use it.
|
|
dumpId = mBrowserDumpId;
|
|
}
|
|
|
|
mProcess->SetHangData(mHangData, dumpId);
|
|
|
|
nsCOMPtr<nsIObserverService> observerService =
|
|
mozilla::services::GetObserverService();
|
|
observerService->NotifyObservers(mProcess, "process-hang-report", nullptr);
|
|
return NS_OK;
|
|
}
|
|
|
|
private:
|
|
RefPtr<HangMonitoredProcess> mProcess;
|
|
HangMonitorParent* mParent;
|
|
HangData mHangData;
|
|
nsAutoString mBrowserDumpId;
|
|
bool mTakeMinidump;
|
|
};
|
|
|
|
// Take a minidump of the browser process if one wasn't already taken for the
|
|
// plugin that caused the hang. Return false if a dump was already available or
|
|
// true if new one has been taken.
|
|
bool
|
|
HangMonitorParent::TakeBrowserMinidump(const PluginHangData& aPhd,
|
|
nsString& aCrashId)
|
|
{
|
|
#ifdef MOZ_CRASHREPORTER
|
|
MutexAutoLock lock(mBrowserCrashDumpHashLock);
|
|
if (!mBrowserCrashDumpIds.Get(aPhd.pluginId(), &aCrashId)) {
|
|
nsCOMPtr<nsIFile> browserDump;
|
|
if (CrashReporter::TakeMinidump(getter_AddRefs(browserDump), true)) {
|
|
if (!CrashReporter::GetIDFromMinidump(browserDump, aCrashId)
|
|
|| aCrashId.IsEmpty()) {
|
|
browserDump->Remove(false);
|
|
NS_WARNING("Failed to generate timely browser stack, "
|
|
"this is bad for plugin hang analysis!");
|
|
} else {
|
|
mBrowserCrashDumpIds.Put(aPhd.pluginId(), aCrashId);
|
|
return true;
|
|
}
|
|
}
|
|
}
|
|
#endif // MOZ_CRASHREPORTER
|
|
|
|
return false;
|
|
}
|
|
|
|
mozilla::ipc::IPCResult
|
|
HangMonitorParent::RecvHangEvidence(const HangData& aHangData)
|
|
{
|
|
// chrome process, background thread
|
|
MOZ_RELEASE_ASSERT(MessageLoop::current() == MonitorLoop());
|
|
|
|
if (!mReportHangs) {
|
|
return IPC_OK();
|
|
}
|
|
|
|
#ifdef XP_WIN
|
|
// Don't report hangs if we're debugging the process. You can comment this
|
|
// line out for testing purposes.
|
|
if (IsDebuggerPresent()) {
|
|
return IPC_OK();
|
|
}
|
|
#endif
|
|
|
|
// Before we wake up the browser main thread we want to take a
|
|
// browser minidump.
|
|
nsAutoString crashId;
|
|
bool takeMinidump = false;
|
|
if (aHangData.type() == HangData::TPluginHangData) {
|
|
takeMinidump = TakeBrowserMinidump(aHangData.get_PluginHangData(), crashId);
|
|
}
|
|
|
|
mHangMonitor->InitiateCPOWTimeout();
|
|
|
|
MonitorAutoLock lock(mMonitor);
|
|
|
|
nsCOMPtr<nsIRunnable> notifier =
|
|
new HangObserverNotifier(mProcess, this, aHangData, crashId, takeMinidump);
|
|
NS_DispatchToMainThread(notifier);
|
|
|
|
return IPC_OK();
|
|
}
|
|
|
|
class ClearHangNotifier final : public Runnable
|
|
{
|
|
public:
|
|
explicit ClearHangNotifier(HangMonitoredProcess* aProcess)
|
|
: mProcess(aProcess)
|
|
{}
|
|
|
|
NS_IMETHOD
|
|
Run() override
|
|
{
|
|
// chrome process, main thread
|
|
MOZ_RELEASE_ASSERT(NS_IsMainThread());
|
|
mProcess->ClearHang();
|
|
|
|
nsCOMPtr<nsIObserverService> observerService =
|
|
mozilla::services::GetObserverService();
|
|
observerService->NotifyObservers(mProcess, "clear-hang-report", nullptr);
|
|
return NS_OK;
|
|
}
|
|
|
|
private:
|
|
RefPtr<HangMonitoredProcess> mProcess;
|
|
};
|
|
|
|
mozilla::ipc::IPCResult
|
|
HangMonitorParent::RecvClearHang()
|
|
{
|
|
// chrome process, background thread
|
|
MOZ_RELEASE_ASSERT(MessageLoop::current() == MonitorLoop());
|
|
|
|
if (!mReportHangs) {
|
|
return IPC_OK();
|
|
}
|
|
|
|
mHangMonitor->InitiateCPOWTimeout();
|
|
|
|
MonitorAutoLock lock(mMonitor);
|
|
|
|
nsCOMPtr<nsIRunnable> notifier =
|
|
new ClearHangNotifier(mProcess);
|
|
NS_DispatchToMainThread(notifier);
|
|
|
|
return IPC_OK();
|
|
}
|
|
|
|
void
|
|
HangMonitorParent::TerminateScript()
|
|
{
|
|
MOZ_RELEASE_ASSERT(MessageLoop::current() == MonitorLoop());
|
|
|
|
if (mIPCOpen) {
|
|
Unused << SendTerminateScript();
|
|
}
|
|
}
|
|
|
|
void
|
|
HangMonitorParent::BeginStartingDebugger()
|
|
{
|
|
MOZ_RELEASE_ASSERT(MessageLoop::current() == MonitorLoop());
|
|
|
|
if (mIPCOpen) {
|
|
Unused << SendBeginStartingDebugger();
|
|
}
|
|
}
|
|
|
|
void
|
|
HangMonitorParent::EndStartingDebugger()
|
|
{
|
|
MOZ_RELEASE_ASSERT(MessageLoop::current() == MonitorLoop());
|
|
|
|
if (mIPCOpen) {
|
|
Unused << SendEndStartingDebugger();
|
|
}
|
|
}
|
|
|
|
void
|
|
HangMonitorParent::CleanupPluginHang(uint32_t aPluginId, bool aRemoveFiles)
|
|
{
|
|
MutexAutoLock lock(mBrowserCrashDumpHashLock);
|
|
nsAutoString crashId;
|
|
if (!mBrowserCrashDumpIds.Get(aPluginId, &crashId)) {
|
|
return;
|
|
}
|
|
mBrowserCrashDumpIds.Remove(aPluginId);
|
|
#ifdef MOZ_CRASHREPORTER
|
|
if (aRemoveFiles && !crashId.IsEmpty()) {
|
|
CrashReporter::DeleteMinidumpFilesForID(crashId);
|
|
}
|
|
#endif
|
|
}
|
|
|
|
void
|
|
HangMonitorParent::UpdateMinidump(uint32_t aPluginId, const nsString& aDumpId)
|
|
{
|
|
if (aDumpId.IsEmpty()) {
|
|
return;
|
|
}
|
|
|
|
MutexAutoLock lock(mBrowserCrashDumpHashLock);
|
|
mBrowserCrashDumpIds.Put(aPluginId, aDumpId);
|
|
}
|
|
|
|
/* HangMonitoredProcess implementation */
|
|
|
|
NS_IMPL_ISUPPORTS(HangMonitoredProcess, nsIHangReport)
|
|
|
|
NS_IMETHODIMP
|
|
HangMonitoredProcess::GetHangType(uint32_t* aHangType)
|
|
{
|
|
MOZ_RELEASE_ASSERT(NS_IsMainThread());
|
|
switch (mHangData.type()) {
|
|
case HangData::TSlowScriptData:
|
|
*aHangType = SLOW_SCRIPT;
|
|
break;
|
|
case HangData::TPluginHangData:
|
|
*aHangType = PLUGIN_HANG;
|
|
break;
|
|
default:
|
|
MOZ_ASSERT_UNREACHABLE("Unexpected HangData type");
|
|
return NS_ERROR_UNEXPECTED;
|
|
}
|
|
|
|
return NS_OK;
|
|
}
|
|
|
|
NS_IMETHODIMP
|
|
HangMonitoredProcess::GetScriptBrowser(nsIDOMElement** aBrowser)
|
|
{
|
|
MOZ_RELEASE_ASSERT(NS_IsMainThread());
|
|
if (mHangData.type() != HangData::TSlowScriptData) {
|
|
return NS_ERROR_NOT_AVAILABLE;
|
|
}
|
|
|
|
TabId tabId = mHangData.get_SlowScriptData().tabId();
|
|
if (!mContentParent) {
|
|
return NS_ERROR_NOT_AVAILABLE;
|
|
}
|
|
|
|
nsTArray<PBrowserParent*> tabs;
|
|
mContentParent->ManagedPBrowserParent(tabs);
|
|
for (size_t i = 0; i < tabs.Length(); i++) {
|
|
TabParent* tp = TabParent::GetFrom(tabs[i]);
|
|
if (tp->GetTabId() == tabId) {
|
|
nsCOMPtr<nsIDOMElement> node = do_QueryInterface(tp->GetOwnerElement());
|
|
node.forget(aBrowser);
|
|
return NS_OK;
|
|
}
|
|
}
|
|
|
|
*aBrowser = nullptr;
|
|
return NS_OK;
|
|
}
|
|
|
|
NS_IMETHODIMP
|
|
HangMonitoredProcess::GetScriptFileName(nsACString& aFileName)
|
|
{
|
|
MOZ_RELEASE_ASSERT(NS_IsMainThread());
|
|
if (mHangData.type() != HangData::TSlowScriptData) {
|
|
return NS_ERROR_NOT_AVAILABLE;
|
|
}
|
|
|
|
aFileName = mHangData.get_SlowScriptData().filename();
|
|
return NS_OK;
|
|
}
|
|
|
|
NS_IMETHODIMP
|
|
HangMonitoredProcess::GetScriptLineNo(uint32_t* aLineNo)
|
|
{
|
|
MOZ_RELEASE_ASSERT(NS_IsMainThread());
|
|
if (mHangData.type() != HangData::TSlowScriptData) {
|
|
return NS_ERROR_NOT_AVAILABLE;
|
|
}
|
|
|
|
*aLineNo = mHangData.get_SlowScriptData().lineno();
|
|
return NS_OK;
|
|
}
|
|
|
|
NS_IMETHODIMP
|
|
HangMonitoredProcess::GetPluginName(nsACString& aPluginName)
|
|
{
|
|
MOZ_RELEASE_ASSERT(NS_IsMainThread());
|
|
if (mHangData.type() != HangData::TPluginHangData) {
|
|
return NS_ERROR_NOT_AVAILABLE;
|
|
}
|
|
|
|
uint32_t id = mHangData.get_PluginHangData().pluginId();
|
|
|
|
RefPtr<nsPluginHost> host = nsPluginHost::GetInst();
|
|
nsPluginTag* tag = host->PluginWithId(id);
|
|
if (!tag) {
|
|
return NS_ERROR_UNEXPECTED;
|
|
}
|
|
|
|
aPluginName = tag->Name();
|
|
return NS_OK;
|
|
}
|
|
|
|
NS_IMETHODIMP
|
|
HangMonitoredProcess::TerminateScript()
|
|
{
|
|
MOZ_RELEASE_ASSERT(NS_IsMainThread());
|
|
if (mHangData.type() != HangData::TSlowScriptData) {
|
|
return NS_ERROR_UNEXPECTED;
|
|
}
|
|
|
|
if (!mActor) {
|
|
return NS_ERROR_UNEXPECTED;
|
|
}
|
|
|
|
ProcessHangMonitor::Get()->MonitorLoop()->PostTask(NewNonOwningRunnableMethod(mActor,
|
|
&HangMonitorParent::TerminateScript));
|
|
return NS_OK;
|
|
}
|
|
|
|
NS_IMETHODIMP
|
|
HangMonitoredProcess::BeginStartingDebugger()
|
|
{
|
|
MOZ_RELEASE_ASSERT(NS_IsMainThread());
|
|
if (mHangData.type() != HangData::TSlowScriptData) {
|
|
return NS_ERROR_UNEXPECTED;
|
|
}
|
|
|
|
if (!mActor) {
|
|
return NS_ERROR_UNEXPECTED;
|
|
}
|
|
|
|
ProcessHangMonitor::Get()->MonitorLoop()->PostTask(NewNonOwningRunnableMethod(mActor,
|
|
&HangMonitorParent::BeginStartingDebugger));
|
|
return NS_OK;
|
|
}
|
|
|
|
NS_IMETHODIMP
|
|
HangMonitoredProcess::EndStartingDebugger()
|
|
{
|
|
MOZ_RELEASE_ASSERT(NS_IsMainThread());
|
|
if (mHangData.type() != HangData::TSlowScriptData) {
|
|
return NS_ERROR_UNEXPECTED;
|
|
}
|
|
|
|
if (!mActor) {
|
|
return NS_ERROR_UNEXPECTED;
|
|
}
|
|
|
|
ProcessHangMonitor::Get()->MonitorLoop()->PostTask(NewNonOwningRunnableMethod(mActor,
|
|
&HangMonitorParent::EndStartingDebugger));
|
|
return NS_OK;
|
|
}
|
|
|
|
NS_IMETHODIMP
|
|
HangMonitoredProcess::TerminatePlugin()
|
|
{
|
|
MOZ_RELEASE_ASSERT(NS_IsMainThread());
|
|
if (mHangData.type() != HangData::TPluginHangData) {
|
|
return NS_ERROR_UNEXPECTED;
|
|
}
|
|
|
|
// Use the multi-process crash report generated earlier.
|
|
uint32_t id = mHangData.get_PluginHangData().pluginId();
|
|
base::ProcessId contentPid = mHangData.get_PluginHangData().contentProcessId();
|
|
plugins::TerminatePlugin(id, contentPid, NS_LITERAL_CSTRING("HangMonitor"),
|
|
mDumpId);
|
|
|
|
if (mActor) {
|
|
mActor->CleanupPluginHang(id, false);
|
|
}
|
|
return NS_OK;
|
|
}
|
|
|
|
NS_IMETHODIMP
|
|
HangMonitoredProcess::IsReportForBrowser(nsIFrameLoader* aFrameLoader, bool* aResult)
|
|
{
|
|
MOZ_RELEASE_ASSERT(NS_IsMainThread());
|
|
|
|
if (!mActor) {
|
|
*aResult = false;
|
|
return NS_OK;
|
|
}
|
|
|
|
TabParent* tp = TabParent::GetFrom(aFrameLoader);
|
|
if (!tp) {
|
|
*aResult = false;
|
|
return NS_OK;
|
|
}
|
|
|
|
*aResult = mContentParent == tp->Manager();
|
|
return NS_OK;
|
|
}
|
|
|
|
NS_IMETHODIMP
|
|
HangMonitoredProcess::UserCanceled()
|
|
{
|
|
MOZ_RELEASE_ASSERT(NS_IsMainThread());
|
|
if (mHangData.type() != HangData::TPluginHangData) {
|
|
return NS_OK;
|
|
}
|
|
|
|
if (mActor) {
|
|
uint32_t id = mHangData.get_PluginHangData().pluginId();
|
|
mActor->CleanupPluginHang(id, true);
|
|
}
|
|
return NS_OK;
|
|
}
|
|
|
|
static bool
|
|
InterruptCallback(JSContext* cx)
|
|
{
|
|
if (HangMonitorChild* child = HangMonitorChild::Get()) {
|
|
child->InterruptCallback();
|
|
}
|
|
|
|
return true;
|
|
}
|
|
|
|
ProcessHangMonitor* ProcessHangMonitor::sInstance;
|
|
|
|
ProcessHangMonitor::ProcessHangMonitor()
|
|
: mCPOWTimeout(false)
|
|
{
|
|
MOZ_RELEASE_ASSERT(NS_IsMainThread());
|
|
|
|
if (XRE_IsContentProcess()) {
|
|
nsCOMPtr<nsIObserverService> obs = mozilla::services::GetObserverService();
|
|
obs->AddObserver(this, "xpcom-shutdown", false);
|
|
}
|
|
|
|
mThread = new base::Thread("ProcessHangMonitor");
|
|
if (!mThread->Start()) {
|
|
delete mThread;
|
|
mThread = nullptr;
|
|
}
|
|
}
|
|
|
|
ProcessHangMonitor::~ProcessHangMonitor()
|
|
{
|
|
MOZ_RELEASE_ASSERT(NS_IsMainThread());
|
|
|
|
MOZ_ASSERT(sInstance == this);
|
|
sInstance = nullptr;
|
|
|
|
delete mThread;
|
|
}
|
|
|
|
ProcessHangMonitor*
|
|
ProcessHangMonitor::GetOrCreate()
|
|
{
|
|
MOZ_RELEASE_ASSERT(NS_IsMainThread());
|
|
if (!sInstance) {
|
|
sInstance = new ProcessHangMonitor();
|
|
}
|
|
return sInstance;
|
|
}
|
|
|
|
NS_IMPL_ISUPPORTS(ProcessHangMonitor, nsIObserver)
|
|
|
|
NS_IMETHODIMP
|
|
ProcessHangMonitor::Observe(nsISupports* aSubject, const char* aTopic, const char16_t* aData)
|
|
{
|
|
MOZ_RELEASE_ASSERT(NS_IsMainThread());
|
|
if (!strcmp(aTopic, "xpcom-shutdown")) {
|
|
if (HangMonitorChild* child = HangMonitorChild::Get()) {
|
|
child->Shutdown();
|
|
delete child;
|
|
}
|
|
|
|
nsCOMPtr<nsIObserverService> obs = mozilla::services::GetObserverService();
|
|
if (obs) {
|
|
obs->RemoveObserver(this, "xpcom-shutdown");
|
|
}
|
|
}
|
|
return NS_OK;
|
|
}
|
|
|
|
ProcessHangMonitor::SlowScriptAction
|
|
ProcessHangMonitor::NotifySlowScript(nsITabChild* aTabChild,
|
|
const char* aFileName,
|
|
unsigned aLineNo)
|
|
{
|
|
MOZ_RELEASE_ASSERT(NS_IsMainThread());
|
|
return HangMonitorChild::Get()->NotifySlowScript(aTabChild, aFileName, aLineNo);
|
|
}
|
|
|
|
bool
|
|
ProcessHangMonitor::IsDebuggerStartupComplete()
|
|
{
|
|
MOZ_RELEASE_ASSERT(NS_IsMainThread());
|
|
return HangMonitorChild::Get()->IsDebuggerStartupComplete();
|
|
}
|
|
|
|
bool
|
|
ProcessHangMonitor::ShouldTimeOutCPOWs()
|
|
{
|
|
MOZ_RELEASE_ASSERT(NS_IsMainThread());
|
|
|
|
if (mCPOWTimeout) {
|
|
mCPOWTimeout = false;
|
|
return true;
|
|
}
|
|
return false;
|
|
}
|
|
|
|
void
|
|
ProcessHangMonitor::InitiateCPOWTimeout()
|
|
{
|
|
MOZ_RELEASE_ASSERT(MessageLoop::current() == MonitorLoop());
|
|
mCPOWTimeout = true;
|
|
}
|
|
|
|
void
|
|
ProcessHangMonitor::NotifyPluginHang(uint32_t aPluginId)
|
|
{
|
|
MOZ_RELEASE_ASSERT(NS_IsMainThread());
|
|
return HangMonitorChild::Get()->NotifyPluginHang(aPluginId);
|
|
}
|
|
|
|
PProcessHangMonitorParent*
|
|
mozilla::CreateHangMonitorParent(ContentParent* aContentParent,
|
|
mozilla::ipc::Transport* aTransport,
|
|
base::ProcessId aOtherPid)
|
|
{
|
|
MOZ_RELEASE_ASSERT(NS_IsMainThread());
|
|
|
|
ProcessHangMonitor* monitor = ProcessHangMonitor::GetOrCreate();
|
|
auto* parent = new HangMonitorParent(monitor);
|
|
|
|
auto* process = new HangMonitoredProcess(parent, aContentParent);
|
|
parent->SetProcess(process);
|
|
|
|
monitor->MonitorLoop()->PostTask(NewNonOwningRunnableMethod
|
|
<mozilla::ipc::Transport*,
|
|
base::ProcessId,
|
|
MessageLoop*>(parent,
|
|
&HangMonitorParent::Open,
|
|
aTransport, aOtherPid,
|
|
XRE_GetIOMessageLoop()));
|
|
|
|
return parent;
|
|
}
|
|
|
|
PProcessHangMonitorChild*
|
|
mozilla::CreateHangMonitorChild(mozilla::ipc::Transport* aTransport,
|
|
base::ProcessId aOtherPid)
|
|
{
|
|
MOZ_RELEASE_ASSERT(NS_IsMainThread());
|
|
|
|
JSContext* cx = danger::GetJSContext();
|
|
JS_AddInterruptCallback(cx, InterruptCallback);
|
|
JS::AddGCInterruptCallback(cx, InterruptCallback);
|
|
|
|
ProcessHangMonitor* monitor = ProcessHangMonitor::GetOrCreate();
|
|
auto* child = new HangMonitorChild(monitor);
|
|
|
|
monitor->MonitorLoop()->PostTask(NewNonOwningRunnableMethod
|
|
<mozilla::ipc::Transport*,
|
|
base::ProcessId,
|
|
MessageLoop*>(child,
|
|
&HangMonitorChild::Open,
|
|
aTransport, aOtherPid,
|
|
XRE_GetIOMessageLoop()));
|
|
|
|
return child;
|
|
}
|
|
|
|
MessageLoop*
|
|
ProcessHangMonitor::MonitorLoop()
|
|
{
|
|
return mThread->message_loop();
|
|
}
|
|
|
|
/* static */ void
|
|
ProcessHangMonitor::AddProcess(ContentParent* aContentParent)
|
|
{
|
|
MOZ_RELEASE_ASSERT(NS_IsMainThread());
|
|
|
|
if (mozilla::Preferences::GetBool("dom.ipc.processHangMonitor", false)) {
|
|
DebugOnly<bool> opened = PProcessHangMonitor::Open(aContentParent);
|
|
MOZ_ASSERT(opened);
|
|
}
|
|
}
|
|
|
|
/* static */ void
|
|
ProcessHangMonitor::RemoveProcess(PProcessHangMonitorParent* aParent)
|
|
{
|
|
MOZ_RELEASE_ASSERT(NS_IsMainThread());
|
|
auto parent = static_cast<HangMonitorParent*>(aParent);
|
|
parent->Shutdown();
|
|
delete parent;
|
|
}
|
|
|
|
/* static */ void
|
|
ProcessHangMonitor::ClearHang()
|
|
{
|
|
MOZ_ASSERT(NS_IsMainThread());
|
|
if (HangMonitorChild* child = HangMonitorChild::Get()) {
|
|
child->ClearHang();
|
|
}
|
|
}
|
|
|
|
/* static */ void
|
|
ProcessHangMonitor::ForcePaint(PProcessHangMonitorParent* aParent,
|
|
dom::TabParent* aTabParent,
|
|
uint64_t aLayerObserverEpoch)
|
|
{
|
|
MOZ_RELEASE_ASSERT(NS_IsMainThread());
|
|
auto parent = static_cast<HangMonitorParent*>(aParent);
|
|
parent->ForcePaint(aTabParent, aLayerObserverEpoch);
|
|
}
|
|
|
|
/* static */ void
|
|
ProcessHangMonitor::ClearForcePaint()
|
|
{
|
|
MOZ_RELEASE_ASSERT(NS_IsMainThread());
|
|
MOZ_RELEASE_ASSERT(XRE_IsContentProcess());
|
|
|
|
if (HangMonitorChild* child = HangMonitorChild::Get()) {
|
|
child->ClearForcePaint();
|
|
}
|
|
}
|