mirror of
https://gitlab.winehq.org/wine/wine-gecko.git
synced 2024-09-13 09:24:08 -07:00
b9afeeb542
We want this right now so that we can avoid the scary warning when content Components access happens in XBL (which we're allowing going forward). This patch would be overkill just for that, but I also have plans to introduce a SOW-like protection of the Components wrapper filtering policy. I can't just do the filename hack for that though, because real- world XBL filenames might be all over the place. So let's just be safe here.
371 lines
13 KiB
C++
371 lines
13 KiB
C++
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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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 nsJSEnvironment_h
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#define nsJSEnvironment_h
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#include "nsIScriptContext.h"
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#include "nsIScriptRuntime.h"
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#include "nsIScriptGlobalObject.h"
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#include "nsCOMPtr.h"
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#include "jsapi.h"
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#include "jsfriendapi.h"
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#include "nsIObserver.h"
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#include "nsIXPCScriptNotify.h"
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#include "prtime.h"
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#include "nsCycleCollectionParticipant.h"
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#include "nsIXPConnect.h"
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#include "nsIArray.h"
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#include "mozilla/Attributes.h"
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class nsIXPConnectJSObjectHolder;
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class nsRootedJSValueArray;
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class nsScriptNameSpaceManager;
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namespace mozilla {
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template <class> class Maybe;
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}
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// The amount of time we wait between a request to GC (due to leaving
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// a page) and doing the actual GC.
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#define NS_GC_DELAY 4000 // ms
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class nsJSContext : public nsIScriptContext,
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public nsIXPCScriptNotify
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{
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public:
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nsJSContext(JSRuntime *aRuntime);
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virtual ~nsJSContext();
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NS_DECL_CYCLE_COLLECTING_ISUPPORTS
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NS_DECL_CYCLE_COLLECTION_SCRIPT_HOLDER_CLASS_AMBIGUOUS(nsJSContext,
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nsIScriptContext)
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virtual nsIScriptObjectPrincipal* GetObjectPrincipal();
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virtual void SetGlobalObject(nsIScriptGlobalObject* aGlobalObject)
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{
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mGlobalObjectRef = aGlobalObject;
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}
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virtual nsresult EvaluateString(const nsAString& aScript,
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JSObject* aScopeObject,
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nsIPrincipal *principal,
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nsIPrincipal *originPrincipal,
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const char *aURL,
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uint32_t aLineNo,
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JSVersion aVersion,
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nsAString *aRetValue,
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bool* aIsUndefined);
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virtual nsresult EvaluateStringWithValue(const nsAString& aScript,
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JSObject* aScopeObject,
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nsIPrincipal* aPrincipal,
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const char* aURL,
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uint32_t aLineNo,
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uint32_t aVersion,
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JS::Value* aRetValue,
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bool* aIsUndefined);
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virtual nsresult CompileScript(const PRUnichar* aText,
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int32_t aTextLength,
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nsIPrincipal *principal,
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const char *aURL,
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uint32_t aLineNo,
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uint32_t aVersion,
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nsScriptObjectHolder<JSScript>& aScriptObject,
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bool aSaveSource = false);
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virtual nsresult ExecuteScript(JSScript* aScriptObject,
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JSObject* aScopeObject,
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nsAString* aRetValue,
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bool* aIsUndefined);
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virtual nsresult CompileEventHandler(nsIAtom *aName,
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uint32_t aArgCount,
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const char** aArgNames,
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const nsAString& aBody,
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const char *aURL, uint32_t aLineNo,
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uint32_t aVersion,
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bool aIsXBL,
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nsScriptObjectHolder<JSObject>& aHandler);
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virtual nsresult CallEventHandler(nsISupports* aTarget, JSObject* aScope,
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JSObject* aHandler,
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nsIArray *argv, nsIVariant **rv);
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virtual nsresult BindCompiledEventHandler(nsISupports *aTarget,
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JSObject *aScope,
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JSObject* aHandler,
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nsScriptObjectHolder<JSObject>& aBoundHandler);
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virtual nsresult CompileFunction(JSObject* aTarget,
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const nsACString& aName,
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uint32_t aArgCount,
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const char** aArgArray,
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const nsAString& aBody,
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const char* aURL,
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uint32_t aLineNo,
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uint32_t aVersion,
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bool aShared,
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bool aIsXBL,
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JSObject** aFunctionObject);
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virtual nsIScriptGlobalObject *GetGlobalObject();
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inline nsIScriptGlobalObject *GetGlobalObjectRef() { return mGlobalObjectRef; };
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virtual JSContext* GetNativeContext();
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virtual JSObject* GetNativeGlobal();
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virtual nsresult InitContext();
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virtual bool IsContextInitialized();
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virtual void ScriptEvaluated(bool aTerminated);
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virtual void SetTerminationFunction(nsScriptTerminationFunc aFunc,
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nsIDOMWindow* aRef);
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virtual bool GetScriptsEnabled();
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virtual void SetScriptsEnabled(bool aEnabled, bool aFireTimeouts);
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virtual nsresult SetProperty(JSObject* aTarget, const char* aPropName, nsISupports* aVal);
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virtual bool GetProcessingScriptTag();
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virtual void SetProcessingScriptTag(bool aResult);
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virtual bool GetExecutingScript();
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virtual void SetGCOnDestruction(bool aGCOnDestruction);
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virtual nsresult InitClasses(JSObject* aGlobalObj);
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virtual void WillInitializeContext();
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virtual void DidInitializeContext();
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virtual nsresult Serialize(nsIObjectOutputStream* aStream, JSScript* aScriptObject);
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virtual nsresult Deserialize(nsIObjectInputStream* aStream,
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nsScriptObjectHolder<JSScript>& aResult);
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virtual nsresult DropScriptObject(void *object);
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virtual nsresult HoldScriptObject(void *object);
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virtual void EnterModalState();
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virtual void LeaveModalState();
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NS_DECL_NSIXPCSCRIPTNOTIFY
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static void LoadStart();
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static void LoadEnd();
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enum IsCompartment {
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CompartmentGC,
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NonCompartmentGC
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};
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enum IsShrinking {
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ShrinkingGC,
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NonShrinkingGC
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};
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enum IsIncremental {
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IncrementalGC,
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NonIncrementalGC
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};
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static void GarbageCollectNow(js::gcreason::Reason reason,
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IsIncremental aIncremental = NonIncrementalGC,
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IsCompartment aCompartment = NonCompartmentGC,
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IsShrinking aShrinking = NonShrinkingGC,
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int64_t aSliceMillis = 0);
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static void ShrinkGCBuffersNow();
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// If aExtraForgetSkippableCalls is -1, forgetSkippable won't be
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// called even if the previous collection was GC.
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static void CycleCollectNow(nsICycleCollectorListener *aListener = nullptr,
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int32_t aExtraForgetSkippableCalls = 0,
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bool aForced = true);
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static void PokeGC(js::gcreason::Reason aReason, int aDelay = 0);
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static void KillGCTimer();
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static void PokeShrinkGCBuffers();
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static void KillShrinkGCBuffersTimer();
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static void MaybePokeCC();
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static void KillCCTimer();
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static void KillFullGCTimer();
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static void KillInterSliceGCTimer();
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virtual void GC(js::gcreason::Reason aReason);
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static uint32_t CleanupsSinceLastGC();
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nsIScriptGlobalObject* GetCachedGlobalObject()
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{
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// Verify that we have a global so that this
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// does always return a null when GetGlobalObject() is null.
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JSObject* global = JS_GetGlobalObject(mContext);
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return global ? mGlobalObjectRef.get() : nullptr;
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}
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protected:
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nsresult InitializeExternalClasses();
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// Helper to convert xpcom datatypes to jsvals.
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nsresult ConvertSupportsTojsvals(nsISupports *aArgs,
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JSObject *aScope,
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uint32_t *aArgc,
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jsval **aArgv,
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mozilla::Maybe<nsRootedJSValueArray> &aPoolRelease);
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nsresult AddSupportsPrimitiveTojsvals(nsISupports *aArg, jsval *aArgv);
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// given an nsISupports object (presumably an event target or some other
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// DOM object), get (or create) the JSObject wrapping it.
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nsresult JSObjectFromInterface(nsISupports *aSup, JSObject *aScript,
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JSObject **aRet);
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// Report the pending exception on our mContext, if any. This
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// function will set aside the frame chain on mContext before
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// reporting.
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void ReportPendingException();
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private:
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void DestroyJSContext();
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nsrefcnt GetCCRefcnt();
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JSContext *mContext;
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bool mActive;
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protected:
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struct TerminationFuncHolder;
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friend struct TerminationFuncHolder;
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struct TerminationFuncClosure
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{
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TerminationFuncClosure(nsScriptTerminationFunc aFunc,
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nsISupports* aArg,
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TerminationFuncClosure* aNext) :
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mTerminationFunc(aFunc),
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mTerminationFuncArg(aArg),
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mNext(aNext)
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{
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}
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~TerminationFuncClosure()
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{
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delete mNext;
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}
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nsScriptTerminationFunc mTerminationFunc;
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nsCOMPtr<nsISupports> mTerminationFuncArg;
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TerminationFuncClosure* mNext;
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};
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struct TerminationFuncHolder
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{
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TerminationFuncHolder(nsJSContext* aContext)
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: mContext(aContext),
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mTerminations(aContext->mTerminations)
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{
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aContext->mTerminations = nullptr;
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}
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~TerminationFuncHolder()
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{
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// Have to be careful here. mContext might have picked up new
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// termination funcs while the script was evaluating. Prepend whatever
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// we have to the current termination funcs on the context (since our
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// termination funcs were posted first).
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if (mTerminations) {
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TerminationFuncClosure* cur = mTerminations;
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while (cur->mNext) {
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cur = cur->mNext;
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}
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cur->mNext = mContext->mTerminations;
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mContext->mTerminations = mTerminations;
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}
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}
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nsJSContext* mContext;
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TerminationFuncClosure* mTerminations;
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};
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TerminationFuncClosure* mTerminations;
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private:
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bool mIsInitialized;
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bool mScriptsEnabled;
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bool mGCOnDestruction;
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bool mProcessingScriptTag;
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uint32_t mExecuteDepth;
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uint32_t mDefaultJSOptions;
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PRTime mOperationCallbackTime;
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PRTime mModalStateTime;
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uint32_t mModalStateDepth;
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nsJSContext *mNext;
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nsJSContext **mPrev;
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// mGlobalObjectRef ensures that the outer window stays alive as long as the
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// context does. It is eventually collected by the cycle collector.
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nsCOMPtr<nsIScriptGlobalObject> mGlobalObjectRef;
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static int JSOptionChangedCallback(const char *pref, void *data);
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static JSBool DOMOperationCallback(JSContext *cx);
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};
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class nsIJSRuntimeService;
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class nsJSRuntime MOZ_FINAL : public nsIScriptRuntime
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{
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public:
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// let people who can see us use our runtime for convenience.
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static JSRuntime *sRuntime;
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public:
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// nsISupports
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NS_DECL_ISUPPORTS
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virtual already_AddRefed<nsIScriptContext> CreateContext();
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virtual nsresult DropScriptObject(void *object);
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virtual nsresult HoldScriptObject(void *object);
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static void Startup();
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static void Shutdown();
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// Setup all the statics etc - safe to call multiple times after Startup()
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static nsresult Init();
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// Get the NameSpaceManager, creating if necessary
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static nsScriptNameSpaceManager* GetNameSpaceManager();
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};
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// An interface for fast and native conversion to/from nsIArray. If an object
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// supports this interface, JS can reach directly in for the argv, and avoid
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// nsISupports conversion. If this interface is not supported, the object will
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// be queried for nsIArray, and everything converted via xpcom objects.
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#define NS_IJSARGARRAY_IID \
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{ 0xb6acdac8, 0xf5c6, 0x432c, \
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{ 0xa8, 0x6e, 0x33, 0xee, 0xb1, 0xb0, 0xcd, 0xdc } }
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class nsIJSArgArray : public nsIArray
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{
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public:
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NS_DECLARE_STATIC_IID_ACCESSOR(NS_IJSARGARRAY_IID)
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// Bug 312003 describes why this must be "void **", but after calling argv
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// may be cast to jsval* and the args found at:
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// ((jsval*)argv)[0], ..., ((jsval*)argv)[argc - 1]
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virtual nsresult GetArgs(uint32_t *argc, void **argv) = 0;
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};
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NS_DEFINE_STATIC_IID_ACCESSOR(nsIJSArgArray, NS_IJSARGARRAY_IID)
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/* factory functions */
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nsresult NS_CreateJSRuntime(nsIScriptRuntime **aRuntime);
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/* prototypes */
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void NS_ScriptErrorReporter(JSContext *cx, const char *message, JSErrorReport *report);
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JSObject* NS_DOMReadStructuredClone(JSContext* cx,
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JSStructuredCloneReader* reader, uint32_t tag,
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uint32_t data, void* closure);
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JSBool NS_DOMWriteStructuredClone(JSContext* cx,
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JSStructuredCloneWriter* writer,
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JSObject* obj, void *closure);
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void NS_DOMStructuredCloneError(JSContext* cx, uint32_t errorid);
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#endif /* nsJSEnvironment_h */
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