forked from mirrors/gecko-dev
2bc88d71e0
Crash annotations in content processes are currently sent over IPC via shared memory buffers. To pave the way for the Rust rewrite of the exception handler we are removing this code and gathering all the crash annotations within the content processes themselves. This patch causes annotations to be stored in the global table of each content process. They are then streamed out to the parent process by the exception handler together with the exception-time annotations. This has a number of benefits: * we have one less channel to exchange data between content processes and the parent process * we save memory because we don't need to allocate the shared memory buffers * annotations are faster because we don't stream them all out every time one changes * we won't truncate annotations anymore if we run out of space in the shared segment. * we don't need delayed annotations anymore, so we can get rid of the associated machinery As I refactored the code I tried to adjust all the obsolete comments, consolidate shared code and remove the redundant steps that were sometimes present. In many places we had two entire crash annotation tables we merged to change just a couple; that comes from the fact that historically we loaded them from disk. Now it doesn't matter anymore and we can just go ahead and change the ones we care about. Differential Revision: https://phabricator.services.mozilla.com/D62586 --HG-- extra : moz-landing-system : lando
341 lines
11 KiB
C++
341 lines
11 KiB
C++
/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*-
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* vim: sw=2 ts=4 et :
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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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#ifndef dom_plugins_PluginModuleChild_h
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#define dom_plugins_PluginModuleChild_h 1
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#include "mozilla/Attributes.h"
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#include <string>
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#include <vector>
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#include "base/basictypes.h"
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#include "prlink.h"
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#include "npapi.h"
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#include "npfunctions.h"
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#include "nsDataHashtable.h"
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#include "nsTHashtable.h"
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#include "nsHashKeys.h"
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#ifdef MOZ_WIDGET_COCOA
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# include "PluginInterposeOSX.h"
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#endif
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#include "mozilla/plugins/PPluginModuleChild.h"
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#include "mozilla/plugins/PluginInstanceChild.h"
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#include "mozilla/plugins/PluginMessageUtils.h"
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#include "mozilla/plugins/PluginQuirks.h"
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namespace mozilla {
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class ChildProfilerController;
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namespace plugins {
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class PluginInstanceChild;
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class PluginModuleChild : public PPluginModuleChild {
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friend class PPluginModuleChild;
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protected:
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virtual mozilla::ipc::RacyInterruptPolicy MediateInterruptRace(
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const MessageInfo& parent, const MessageInfo& child) override {
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return MediateRace(parent, child);
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}
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virtual bool ShouldContinueFromReplyTimeout() override;
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mozilla::ipc::IPCResult RecvSettingChanged(const PluginSettings& aSettings);
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// Implement the PPluginModuleChild interface
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mozilla::ipc::IPCResult RecvInitProfiler(
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Endpoint<mozilla::PProfilerChild>&& aEndpoint);
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mozilla::ipc::IPCResult RecvDisableFlashProtectedMode();
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mozilla::ipc::IPCResult AnswerNP_GetEntryPoints(NPError* rv);
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mozilla::ipc::IPCResult AnswerNP_Initialize(const PluginSettings& aSettings,
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NPError* rv);
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mozilla::ipc::IPCResult AnswerSyncNPP_New(PPluginInstanceChild* aActor,
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NPError* rv);
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mozilla::ipc::IPCResult RecvInitPluginModuleChild(
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Endpoint<PPluginModuleChild>&& endpoint);
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mozilla::ipc::IPCResult RecvInitPluginFunctionBroker(
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Endpoint<PFunctionBrokerChild>&& endpoint);
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PPluginInstanceChild* AllocPPluginInstanceChild(
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const nsCString& aMimeType, const nsTArray<nsCString>& aNames,
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const nsTArray<nsCString>& aValues);
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bool DeallocPPluginInstanceChild(PPluginInstanceChild* aActor);
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mozilla::ipc::IPCResult RecvPPluginInstanceConstructor(
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PPluginInstanceChild* aActor, const nsCString& aMimeType,
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nsTArray<nsCString>&& aNames, nsTArray<nsCString>&& aValues) override;
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mozilla::ipc::IPCResult AnswerNP_Shutdown(NPError* rv);
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mozilla::ipc::IPCResult AnswerOptionalFunctionsSupported(
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bool* aURLRedirectNotify, bool* aClearSiteData, bool* aGetSitesWithData);
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mozilla::ipc::IPCResult RecvNPP_ClearSiteData(const nsCString& aSite,
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const uint64_t& aFlags,
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const uint64_t& aMaxAge,
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const uint64_t& aCallbackId);
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mozilla::ipc::IPCResult RecvNPP_GetSitesWithData(const uint64_t& aCallbackId);
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mozilla::ipc::IPCResult RecvSetAudioSessionData(const nsID& aId,
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const nsString& aDisplayName,
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const nsString& aIconPath);
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mozilla::ipc::IPCResult RecvSetParentHangTimeout(const uint32_t& aSeconds);
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mozilla::ipc::IPCResult AnswerInitCrashReporter(
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mozilla::dom::NativeThreadId* aId);
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virtual void ActorDestroy(ActorDestroyReason why) override;
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mozilla::ipc::IPCResult RecvProcessNativeEventsInInterruptCall();
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mozilla::ipc::IPCResult AnswerModuleSupportsAsyncRender(bool* aResult);
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public:
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explicit PluginModuleChild(bool aIsChrome);
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virtual ~PluginModuleChild();
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void CommonInit();
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#if defined(OS_WIN) && defined(MOZ_SANDBOX)
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// Path to the roaming Flash Player folder. This is used to restore some
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// behavior blocked by the sandbox.
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static void SetFlashRoamingPath(const std::wstring& aRoamingPath);
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static std::wstring GetFlashRoamingPath();
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#endif
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// aPluginFilename is UTF8, not native-charset!
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bool InitForChrome(const std::string& aPluginFilename,
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base::ProcessId aParentPid, MessageLoop* aIOLoop,
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UniquePtr<IPC::Channel> aChannel);
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bool InitForContent(Endpoint<PPluginModuleChild>&& aEndpoint);
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static bool CreateForContentProcess(Endpoint<PPluginModuleChild>&& aEndpoint);
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void CleanUp();
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NPError NP_Shutdown();
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const char* GetUserAgent();
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static const NPNetscapeFuncs sBrowserFuncs;
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static PluginModuleChild* GetChrome();
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/**
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* The child implementation of NPN_CreateObject.
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*/
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static NPObject* NPN_CreateObject(NPP aNPP, NPClass* aClass);
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/**
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* The child implementation of NPN_RetainObject.
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*/
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static NPObject* NPN_RetainObject(NPObject* aNPObj);
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/**
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* The child implementation of NPN_ReleaseObject.
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*/
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static void NPN_ReleaseObject(NPObject* aNPObj);
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/**
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* The child implementations of NPIdentifier-related functions.
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*/
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static NPIdentifier NPN_GetStringIdentifier(const NPUTF8* aName);
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static void NPN_GetStringIdentifiers(const NPUTF8** aNames,
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int32_t aNameCount,
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NPIdentifier* aIdentifiers);
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static NPIdentifier NPN_GetIntIdentifier(int32_t aIntId);
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static bool NPN_IdentifierIsString(NPIdentifier aIdentifier);
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static NPUTF8* NPN_UTF8FromIdentifier(NPIdentifier aIdentifier);
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static int32_t NPN_IntFromIdentifier(NPIdentifier aIdentifier);
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#ifdef MOZ_WIDGET_COCOA
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void ProcessNativeEvents();
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void PluginShowWindow(uint32_t window_id, bool modal, CGRect r) {
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SendPluginShowWindow(window_id, modal, r.origin.x, r.origin.y, r.size.width,
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r.size.height);
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}
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void PluginHideWindow(uint32_t window_id) { SendPluginHideWindow(window_id); }
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void SetCursor(NSCursorInfo& cursorInfo) { SendSetCursor(cursorInfo); }
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void ShowCursor(bool show) { SendShowCursor(show); }
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void PushCursor(NSCursorInfo& cursorInfo) { SendPushCursor(cursorInfo); }
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void PopCursor() { SendPopCursor(); }
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bool GetNativeCursorsSupported() {
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return Settings().nativeCursorsSupported();
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}
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#endif
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int GetQuirks() { return mQuirks; }
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const PluginSettings& Settings() const { return mCachedSettings; }
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NPError PluginRequiresAudioDeviceChanges(PluginInstanceChild* aInstance,
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NPBool aShouldRegister);
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mozilla::ipc::IPCResult RecvNPP_SetValue_NPNVaudioDeviceChangeDetails(
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const NPAudioDeviceChangeDetailsIPC& detailsIPC);
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mozilla::ipc::IPCResult RecvNPP_SetValue_NPNVaudioDeviceStateChanged(
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const NPAudioDeviceStateChangedIPC& aDeviceStateIPC);
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private:
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NPError DoNP_Initialize(const PluginSettings& aSettings);
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void AddQuirk(PluginQuirks quirk) {
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if (mQuirks == QUIRKS_NOT_INITIALIZED) mQuirks = 0;
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mQuirks |= quirk;
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}
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void InitQuirksModes(const nsCString& aMimeType);
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bool InitGraphics();
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void DeinitGraphics();
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#if defined(MOZ_WIDGET_GTK)
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static gboolean DetectNestedEventLoop(gpointer data);
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static gboolean ProcessBrowserEvents(gpointer data);
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virtual void EnteredCxxStack() override;
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virtual void ExitedCxxStack() override;
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#endif
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PRLibrary* mLibrary;
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nsCString mPluginFilename; // UTF8
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int mQuirks;
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bool mIsChrome;
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bool mHasShutdown; // true if NP_Shutdown has run
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#ifdef MOZ_GECKO_PROFILER
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RefPtr<ChildProfilerController> mProfilerController;
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#endif
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// we get this from the plugin
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NP_PLUGINSHUTDOWN mShutdownFunc;
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#if defined(OS_LINUX) || defined(OS_BSD) || defined(OS_SOLARIS)
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NP_PLUGINUNIXINIT mInitializeFunc;
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#elif defined(OS_WIN) || defined(OS_MACOSX)
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NP_PLUGININIT mInitializeFunc;
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NP_GETENTRYPOINTS mGetEntryPointsFunc;
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#endif
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NPPluginFuncs mFunctions;
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PluginSettings mCachedSettings;
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#if defined(MOZ_WIDGET_GTK)
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// If a plugin spins a nested glib event loop in response to a
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// synchronous IPC message from the browser, the loop might break
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// only after the browser responds to a request sent by the
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// plugin. This can happen if a plugin uses gtk's synchronous
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// copy/paste, for example. But because the browser is blocked on
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// a condvar, it can't respond to the request. This situation
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// isn't technically a deadlock, but the symptoms are basically
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// the same from the user's perspective.
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//
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// We take two steps to prevent this
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//
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// (1) Detect nested event loops spun by the plugin. This is
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// done by scheduling a glib timer event in the plugin
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// process whenever the browser might block on the plugin.
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// If the plugin indeed spins a nested loop, this timer event
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// will fire "soon" thereafter.
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//
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// (2) When a nested loop is detected, deschedule the
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// nested-loop-detection timer and in its place, schedule
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// another timer that periodically calls back into the
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// browser and spins a mini event loop. This mini event loop
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// processes a handful of pending native events.
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//
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// Because only timer (1) or (2) (or neither) may be active at any
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// point in time, we use the same member variable
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// |mNestedLoopTimerId| to refer to both.
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//
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// When the browser no longer might be blocked on a plugin's IPC
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// response, we deschedule whichever of (1) or (2) is active.
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guint mNestedLoopTimerId;
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# ifdef DEBUG
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// Depth of the stack of calls to g_main_context_dispatch before any
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// nested loops are run. This is 1 when IPC calls are dispatched from
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// g_main_context_iteration, or 0 when dispatched directly from
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// MessagePumpForUI.
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int mTopLoopDepth;
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# endif
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#endif
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#if defined(XP_WIN)
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typedef nsTHashtable<nsPtrHashKey<PluginInstanceChild>> PluginInstanceSet;
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// Set of plugins that have registered to be notified when the audio device
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// changes.
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PluginInstanceSet mAudioNotificationSet;
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#endif
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public: // called by PluginInstanceChild
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/**
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* Dealloc an NPObject after last-release or when the associated instance
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* is destroyed. This function will remove the object from mObjectMap.
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*/
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static void DeallocNPObject(NPObject* o);
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NPError NPP_Destroy(PluginInstanceChild* instance) {
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return mFunctions.destroy(instance->GetNPP(), 0);
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}
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#if defined(OS_MACOSX) && defined(MOZ_SANDBOX)
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void EnableFlashSandbox(int aLevel, bool aShouldEnableLogging);
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#endif
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private:
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#if defined(OS_MACOSX) && defined(MOZ_SANDBOX)
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int mFlashSandboxLevel;
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bool mEnableFlashSandboxLogging;
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#endif
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#if defined(OS_WIN)
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virtual void EnteredCall() override;
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virtual void ExitedCall() override;
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// Entered/ExitedCall notifications keep track of whether the plugin has
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// entered a nested event loop within this interrupt call.
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struct IncallFrame {
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IncallFrame() : _spinning(false), _savedNestableTasksAllowed(false) {}
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bool _spinning;
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bool _savedNestableTasksAllowed;
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};
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AutoTArray<IncallFrame, 8> mIncallPumpingStack;
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static LRESULT CALLBACK NestedInputEventHook(int code, WPARAM wParam,
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LPARAM lParam);
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static LRESULT CALLBACK CallWindowProcHook(int code, WPARAM wParam,
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LPARAM lParam);
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void SetEventHooks();
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void ResetEventHooks();
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HHOOK mNestedEventHook;
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HHOOK mGlobalCallWndProcHook;
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public:
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bool mAsyncRenderSupport;
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#endif
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};
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} /* namespace plugins */
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} /* namespace mozilla */
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#endif // ifndef dom_plugins_PluginModuleChild_h
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