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gecko-dev/dom/plugins/ipc/PluginModuleChild.h

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/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*-
* vim: sw=4 ts=4 et :
* 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/. */
#ifndef dom_plugins_PluginModuleChild_h
#define dom_plugins_PluginModuleChild_h 1
#include "mozilla/Attributes.h"
#include <string>
#include <vector>
#include "base/basictypes.h"
#include "prlink.h"
#include "npapi.h"
#include "npfunctions.h"
#include "nsDataHashtable.h"
#include "nsTHashtable.h"
#include "nsHashKeys.h"
#ifdef MOZ_WIDGET_COCOA
#include "PluginInterposeOSX.h"
#endif
#include "mozilla/plugins/PPluginModuleChild.h"
#include "mozilla/plugins/PluginInstanceChild.h"
#include "mozilla/plugins/PluginMessageUtils.h"
#include "mozilla/plugins/PluginQuirks.h"
// NOTE: stolen from nsNPAPIPlugin.h
#if defined(XP_WIN)
#define NS_NPAPIPLUGIN_CALLBACK(_type, _name) _type (__stdcall * _name)
#else
#define NS_NPAPIPLUGIN_CALLBACK(_type, _name) _type (* _name)
#endif
typedef NS_NPAPIPLUGIN_CALLBACK(NPError, NP_GETENTRYPOINTS) (NPPluginFuncs* pCallbacks);
typedef NS_NPAPIPLUGIN_CALLBACK(NPError, NP_PLUGININIT) (const NPNetscapeFuncs* pCallbacks);
typedef NS_NPAPIPLUGIN_CALLBACK(NPError, NP_PLUGINUNIXINIT) (const NPNetscapeFuncs* pCallbacks, NPPluginFuncs* fCallbacks);
typedef NS_NPAPIPLUGIN_CALLBACK(NPError, NP_PLUGINSHUTDOWN) (void);
namespace mozilla {
namespace dom {
class PCrashReporterChild;
} // namespace dom
namespace plugins {
class PluginInstanceChild;
class PluginModuleChild : public PPluginModuleChild
{
typedef mozilla::dom::PCrashReporterChild PCrashReporterChild;
protected:
virtual mozilla::ipc::RacyInterruptPolicy
MediateInterruptRace(const MessageInfo& parent,
const MessageInfo& child) override
{
return MediateRace(parent, child);
}
virtual bool ShouldContinueFromReplyTimeout() override;
virtual mozilla::ipc::IPCResult RecvSettingChanged(const PluginSettings& aSettings) override;
// Implement the PPluginModuleChild interface
virtual mozilla::ipc::IPCResult RecvDisableFlashProtectedMode() override;
virtual mozilla::ipc::IPCResult AnswerNP_GetEntryPoints(NPError* rv) override;
virtual mozilla::ipc::IPCResult AnswerNP_Initialize(const PluginSettings& aSettings, NPError* rv) override;
virtual mozilla::ipc::IPCResult RecvAsyncNP_Initialize(const PluginSettings& aSettings) override;
virtual mozilla::ipc::IPCResult AnswerSyncNPP_New(PPluginInstanceChild* aActor, NPError* rv)
override;
virtual mozilla::ipc::IPCResult RecvAsyncNPP_New(PPluginInstanceChild* aActor) override;
virtual mozilla::ipc::IPCResult
RecvInitPluginModuleChild(Endpoint<PPluginModuleChild>&& endpoint) override;
virtual PPluginInstanceChild*
AllocPPluginInstanceChild(const nsCString& aMimeType,
const uint16_t& aMode,
const InfallibleTArray<nsCString>& aNames,
const InfallibleTArray<nsCString>& aValues)
override;
virtual bool
DeallocPPluginInstanceChild(PPluginInstanceChild* aActor) override;
virtual mozilla::ipc::IPCResult
RecvPPluginInstanceConstructor(PPluginInstanceChild* aActor,
const nsCString& aMimeType,
const uint16_t& aMode,
InfallibleTArray<nsCString>&& aNames,
InfallibleTArray<nsCString>&& aValues)
override;
virtual mozilla::ipc::IPCResult
AnswerNP_Shutdown(NPError *rv) override;
virtual mozilla::ipc::IPCResult
AnswerOptionalFunctionsSupported(bool *aURLRedirectNotify,
bool *aClearSiteData,
bool *aGetSitesWithData) override;
virtual mozilla::ipc::IPCResult
RecvNPP_ClearSiteData(const nsCString& aSite,
const uint64_t& aFlags,
const uint64_t& aMaxAge,
const uint64_t& aCallbackId) override;
virtual mozilla::ipc::IPCResult
RecvNPP_GetSitesWithData(const uint64_t& aCallbackId) override;
virtual mozilla::ipc::IPCResult
RecvSetAudioSessionData(const nsID& aId,
const nsString& aDisplayName,
const nsString& aIconPath) override;
virtual mozilla::ipc::IPCResult
RecvSetParentHangTimeout(const uint32_t& aSeconds) override;
virtual PCrashReporterChild*
AllocPCrashReporterChild(mozilla::dom::NativeThreadId* id,
uint32_t* processType) override;
virtual bool
DeallocPCrashReporterChild(PCrashReporterChild* actor) override;
virtual mozilla::ipc::IPCResult
AnswerPCrashReporterConstructor(PCrashReporterChild* actor,
mozilla::dom::NativeThreadId* id,
uint32_t* processType) override;
virtual void
ActorDestroy(ActorDestroyReason why) override;
virtual mozilla::ipc::IPCResult
RecvProcessNativeEventsInInterruptCall() override;
virtual mozilla::ipc::IPCResult RecvStartProfiler(const ProfilerInitParams& params) override;
virtual mozilla::ipc::IPCResult RecvStopProfiler() override;
virtual mozilla::ipc::IPCResult RecvGatherProfile() override;
virtual mozilla::ipc::IPCResult
AnswerModuleSupportsAsyncRender(bool* aResult) override;
public:
explicit PluginModuleChild(bool aIsChrome);
virtual ~PluginModuleChild();
void CommonInit();
// aPluginFilename is UTF8, not native-charset!
bool InitForChrome(const std::string& aPluginFilename,
base::ProcessId aParentPid,
MessageLoop* aIOLoop,
IPC::Channel* aChannel);
bool InitForContent(Endpoint<PPluginModuleChild>&& aEndpoint);
static bool
CreateForContentProcess(Endpoint<PPluginModuleChild>&& aEndpoint);
void CleanUp();
NPError NP_Shutdown();
const char* GetUserAgent();
static const NPNetscapeFuncs sBrowserFuncs;
static PluginModuleChild* GetChrome();
/**
* The child implementation of NPN_CreateObject.
*/
static NPObject* NPN_CreateObject(NPP aNPP, NPClass* aClass);
/**
* The child implementation of NPN_RetainObject.
*/
static NPObject* NPN_RetainObject(NPObject* aNPObj);
/**
* The child implementation of NPN_ReleaseObject.
*/
static void NPN_ReleaseObject(NPObject* aNPObj);
/**
* The child implementations of NPIdentifier-related functions.
*/
static NPIdentifier NPN_GetStringIdentifier(const NPUTF8* aName);
static void NPN_GetStringIdentifiers(const NPUTF8** aNames,
int32_t aNameCount,
NPIdentifier* aIdentifiers);
static NPIdentifier NPN_GetIntIdentifier(int32_t aIntId);
static bool NPN_IdentifierIsString(NPIdentifier aIdentifier);
static NPUTF8* NPN_UTF8FromIdentifier(NPIdentifier aIdentifier);
static int32_t NPN_IntFromIdentifier(NPIdentifier aIdentifier);
#ifdef MOZ_WIDGET_COCOA
void ProcessNativeEvents();
void PluginShowWindow(uint32_t window_id, bool modal, CGRect r) {
SendPluginShowWindow(window_id, modal, r.origin.x, r.origin.y, r.size.width, r.size.height);
}
void PluginHideWindow(uint32_t window_id) {
SendPluginHideWindow(window_id);
}
void SetCursor(NSCursorInfo& cursorInfo) {
SendSetCursor(cursorInfo);
}
void ShowCursor(bool show) {
SendShowCursor(show);
}
void PushCursor(NSCursorInfo& cursorInfo) {
SendPushCursor(cursorInfo);
}
void PopCursor() {
SendPopCursor();
}
bool GetNativeCursorsSupported() {
return Settings().nativeCursorsSupported();
}
#endif
int GetQuirks() { return mQuirks; }
const PluginSettings& Settings() const { return mCachedSettings; }
NPError PluginRequiresAudioDeviceChanges(PluginInstanceChild* aInstance,
NPBool aShouldRegister);
mozilla::ipc::IPCResult RecvNPP_SetValue_NPNVaudioDeviceChangeDetails(
const NPAudioDeviceChangeDetailsIPC& detailsIPC) override;
private:
NPError DoNP_Initialize(const PluginSettings& aSettings);
void AddQuirk(PluginQuirks quirk) {
if (mQuirks == QUIRKS_NOT_INITIALIZED)
mQuirks = 0;
mQuirks |= quirk;
}
void InitQuirksModes(const nsCString& aMimeType);
bool InitGraphics();
void DeinitGraphics();
#if defined(OS_WIN)
void HookProtectedMode();
#endif
#if defined(MOZ_WIDGET_GTK)
static gboolean DetectNestedEventLoop(gpointer data);
static gboolean ProcessBrowserEvents(gpointer data);
virtual void EnteredCxxStack() override;
virtual void ExitedCxxStack() override;
#endif
PRLibrary* mLibrary;
nsCString mPluginFilename; // UTF8
int mQuirks;
bool mIsChrome;
bool mHasShutdown; // true if NP_Shutdown has run
// we get this from the plugin
NP_PLUGINSHUTDOWN mShutdownFunc;
#if defined(OS_LINUX) || defined(OS_BSD)
NP_PLUGINUNIXINIT mInitializeFunc;
#elif defined(OS_WIN) || defined(OS_MACOSX)
NP_PLUGININIT mInitializeFunc;
NP_GETENTRYPOINTS mGetEntryPointsFunc;
#endif
NPPluginFuncs mFunctions;
PluginSettings mCachedSettings;
#if defined(MOZ_WIDGET_GTK)
// If a plugin spins a nested glib event loop in response to a
// synchronous IPC message from the browser, the loop might break
// only after the browser responds to a request sent by the
// plugin. This can happen if a plugin uses gtk's synchronous
// copy/paste, for example. But because the browser is blocked on
// a condvar, it can't respond to the request. This situation
// isn't technically a deadlock, but the symptoms are basically
// the same from the user's perspective.
//
// We take two steps to prevent this
//
// (1) Detect nested event loops spun by the plugin. This is
// done by scheduling a glib timer event in the plugin
// process whenever the browser might block on the plugin.
// If the plugin indeed spins a nested loop, this timer event
// will fire "soon" thereafter.
//
// (2) When a nested loop is detected, deschedule the
// nested-loop-detection timer and in its place, schedule
// another timer that periodically calls back into the
// browser and spins a mini event loop. This mini event loop
// processes a handful of pending native events.
//
// Because only timer (1) or (2) (or neither) may be active at any
// point in time, we use the same member variable
// |mNestedLoopTimerId| to refer to both.
//
// When the browser no longer might be blocked on a plugin's IPC
// response, we deschedule whichever of (1) or (2) is active.
guint mNestedLoopTimerId;
# ifdef DEBUG
// Depth of the stack of calls to g_main_context_dispatch before any
// nested loops are run. This is 1 when IPC calls are dispatched from
// g_main_context_iteration, or 0 when dispatched directly from
// MessagePumpForUI.
int mTopLoopDepth;
# endif
#endif
#if defined(XP_WIN)
typedef nsTHashtable<nsPtrHashKey<PluginInstanceChild>> PluginInstanceSet;
// Set of plugins that have registered to be notified when the audio device
// changes.
PluginInstanceSet mAudioNotificationSet;
#endif
public: // called by PluginInstanceChild
/**
* Dealloc an NPObject after last-release or when the associated instance
* is destroyed. This function will remove the object from mObjectMap.
*/
static void DeallocNPObject(NPObject* o);
NPError NPP_Destroy(PluginInstanceChild* instance) {
return mFunctions.destroy(instance->GetNPP(), 0);
}
private:
#if defined(OS_WIN)
virtual void EnteredCall() override;
virtual void ExitedCall() override;
// Entered/ExitedCall notifications keep track of whether the plugin has
// entered a nested event loop within this interrupt call.
struct IncallFrame
{
IncallFrame()
: _spinning(false)
, _savedNestableTasksAllowed(false)
{ }
bool _spinning;
bool _savedNestableTasksAllowed;
};
AutoTArray<IncallFrame, 8> mIncallPumpingStack;
static LRESULT CALLBACK NestedInputEventHook(int code,
WPARAM wParam,
LPARAM lParam);
static LRESULT CALLBACK CallWindowProcHook(int code,
WPARAM wParam,
LPARAM lParam);
void SetEventHooks();
void ResetEventHooks();
HHOOK mNestedEventHook;
HHOOK mGlobalCallWndProcHook;
public:
bool mAsyncRenderSupport;
#endif
};
} /* namespace plugins */
} /* namespace mozilla */
#endif // ifndef dom_plugins_PluginModuleChild_h
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