зеркало из https://github.com/mozilla/gecko-dev.git
Bug 414977 - "insufficient unlink methods in some DOM classes?". Allow the cycle collector to unlink XPCWrappedNatives in one cycle instead of two. r=peterv, sr=jst, a1.9b4+=schrep.
This commit is contained in:
bent.mozilla@gmail.com
Родитель
c6fbe64265
Коммит
05abaea802
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@ -1088,8 +1088,9 @@ NS_IMPL_CYCLE_COLLECTION_UNLINK_BEGIN(nsDocument)
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NS_IMPL_CYCLE_COLLECTION_UNLINK_USERDATA
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// Unlink any associated preserved wrapper.
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tmp->RemoveReference(tmp);
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// Drop the content hash.
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delete tmp->mContentWrapperHash;
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tmp->mContentWrapperHash = nsnull;
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tmp->mParentDocument = nsnull;
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@ -2079,7 +2079,16 @@ public:
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// Root/Unroot methods, to avoid root/unrooting the JS objects from
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// addrefing/releasing the XPCWrappedNative during unlinking, which would
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// make the JS objects uncollectable to the JS GC.
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NS_DECL_CYCLE_COLLECTION_CLASS_NO_UNLINK(XPCWrappedNative)
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class NS_CYCLE_COLLECTION_INNERCLASS
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: public nsXPCOMCycleCollectionParticipant
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{
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NS_DECL_CYCLE_COLLECTION_CLASS_BODY_NO_UNLINK(XPCWrappedNative,
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XPCWrappedNative)
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NS_IMETHOD RootAndUnlinkJSObjects(void *p);
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NS_IMETHOD Unlink(void *p) { return NS_OK; }
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NS_IMETHOD Unroot(void *p) { return NS_OK; }
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};
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NS_CYCLE_COLLECTION_PARTICIPANT_INSTANCE
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NS_DECL_CYCLE_COLLECTION_UNMARK_PURPLE_STUB(XPCWrappedNative)
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#ifndef XPCONNECT_STANDALONE
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@ -2089,8 +2098,10 @@ public:
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JSBool
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IsValid() const {return nsnull != mFlatJSObject;}
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#define XPC_SCOPE_TAG ((jsword)0x1)
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#define XPC_SCOPE_WORD(s) ((jsword)(s))
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#define XPC_SCOPE_WORD(s) ((jsword)(s))
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#define XPC_SCOPE_MASK ((jsword)0x3)
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#define XPC_SCOPE_TAG ((jsword)0x1)
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#define XPC_WRAPPER_EXPIRED ((jsword)0x2)
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static inline JSBool
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IsTaggedScope(XPCWrappedNativeScope* s)
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@ -2105,25 +2116,39 @@ public:
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UnTagScope(XPCWrappedNativeScope* s)
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{return (XPCWrappedNativeScope*)(XPC_SCOPE_WORD(s) & ~XPC_SCOPE_TAG);}
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inline JSBool
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IsWrapperExpired() const
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{return XPC_SCOPE_WORD(mMaybeScope) & XPC_WRAPPER_EXPIRED;}
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JSBool
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HasProto() const {return !IsTaggedScope(mMaybeScope);}
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XPCWrappedNativeProto*
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GetProto() const {return HasProto() ? mMaybeProto : nsnull;}
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GetProto() const
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{return HasProto() ?
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(XPCWrappedNativeProto*)
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(XPC_SCOPE_WORD(mMaybeProto) & ~XPC_SCOPE_MASK) : nsnull;}
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void
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SetProto(XPCWrappedNativeProto* p)
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{NS_ASSERTION(!IsWrapperExpired(), "bad ptr!");
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mMaybeProto = p;}
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XPCWrappedNativeScope*
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GetScope() const {return HasProto() ?
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mMaybeProto->GetScope() : UnTagScope(mMaybeScope);}
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GetScope() const
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{return GetProto() ? GetProto()->GetScope() :
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(XPCWrappedNativeScope*)
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(XPC_SCOPE_WORD(mMaybeScope) & ~XPC_SCOPE_MASK);}
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nsISupports*
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GetIdentityObject() const {return mIdentity;}
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JSObject*
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GetFlatJSObject() const {return mFlatJSObject;}
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GetFlatJSObject() const {return mFlatJSObject;}
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XPCLock*
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GetLock() const {return IsValid() && HasProto() ?
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mMaybeProto->GetLock() : nsnull;}
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GetProto()->GetLock() : nsnull;}
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XPCNativeSet*
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GetSet() const {XPCAutoLock al(GetLock()); return mSet;}
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@ -2131,6 +2156,12 @@ public:
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private:
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void
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SetSet(XPCNativeSet* set) {XPCAutoLock al(GetLock()); mSet = set;}
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inline void
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ExpireWrapper()
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{mMaybeScope = (XPCWrappedNativeScope*)
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(XPC_SCOPE_WORD(mMaybeScope) | XPC_WRAPPER_EXPIRED);}
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public:
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XPCNativeScriptableInfo*
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@ -2141,20 +2172,20 @@ public:
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void**
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GetSecurityInfoAddr() {return HasProto() ?
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mMaybeProto->GetSecurityInfoAddr() : nsnull;}
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GetProto()->GetSecurityInfoAddr() : nsnull;}
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nsIClassInfo*
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GetClassInfo() const {return IsValid() && HasProto() ?
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mMaybeProto->GetClassInfo() : nsnull;}
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GetProto()->GetClassInfo() : nsnull;}
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JSBool
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HasSharedProto() const {return IsValid() && HasProto() &&
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mMaybeProto->IsShared();}
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GetProto()->IsShared();}
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JSBool
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HasMutatedSet() const {return IsValid() &&
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(!HasProto() ||
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GetSet() != mMaybeProto->GetSet());}
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GetSet() != GetProto()->GetSet());}
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XPCJSRuntime*
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GetRuntime() const {XPCWrappedNativeScope* scope = GetScope();
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@ -2240,7 +2271,7 @@ public:
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{
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mSet->Mark();
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if(mScriptableInfo) mScriptableInfo->Mark();
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if(HasProto()) mMaybeProto->Mark();
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if(HasProto()) GetProto()->Mark();
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}
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// Yes, we *do* need to mark the mScriptableInfo in both cases.
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@ -2248,7 +2279,7 @@ public:
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{
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if(mScriptableInfo && JS_IsGCMarkingTracer(trc))
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mScriptableInfo->Mark();
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if(HasProto()) mMaybeProto->TraceJS(trc);
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if(HasProto()) GetProto()->TraceJS(trc);
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if(mWrapper)
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JS_CALL_OBJECT_TRACER(trc, mWrapper, "XPCWrappedNative::mWrapper");
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TraceOtherWrapper(trc);
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@ -2271,7 +2302,7 @@ public:
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#ifdef DEBUG
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void ASSERT_SetsNotMarked() const
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{mSet->ASSERT_NotMarked();
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if(HasProto()){mMaybeProto->ASSERT_SetNotMarked();}}
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if(HasProto()){GetProto()->ASSERT_SetNotMarked();}}
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int DEBUG_CountOfTearoffChunks() const
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{int i = 0; const XPCWrappedNativeTearOffChunk* to;
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@ -50,6 +50,15 @@
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NS_IMPL_CYCLE_COLLECTION_CLASS(XPCWrappedNative)
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NS_IMETHODIMP
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NS_CYCLE_COLLECTION_CLASSNAME(XPCWrappedNative)::RootAndUnlinkJSObjects(void *p)
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{
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XPCWrappedNative *tmp = static_cast<XPCWrappedNative*>(p);
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tmp->ExpireWrapper();
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return NS_OK;
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}
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NS_IMETHODIMP
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NS_CYCLE_COLLECTION_CLASSNAME(XPCWrappedNative)::Traverse(void *p,
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nsCycleCollectionTraversalCallback &cb)
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@ -655,8 +664,12 @@ XPCWrappedNative::~XPCWrappedNative()
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delete mScriptableInfo;
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}
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Native2WrappedNativeMap* map = GetScope()->GetWrappedNativeMap();
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{ // scoped lock
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XPCWrappedNativeScope *scope = GetScope();
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if(scope)
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{
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Native2WrappedNativeMap* map = scope->GetWrappedNativeMap();
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// scoped lock
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XPCAutoLock lock(GetRuntime()->GetMapLock());
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map->Remove(this);
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}
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@ -1031,7 +1044,24 @@ XPCWrappedNative::FlatJSObjectFinalized(JSContext *cx)
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GetScope()->GetWrapperMap()->Remove(mFlatJSObject);
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//This makes IsValid return false from now on...
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if(IsWrapperExpired())
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{
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GetScope()->GetWrappedNativeMap()->Remove(this);
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XPCWrappedNativeProto* proto = GetProto();
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if(mScriptableInfo &&
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(!HasProto() ||
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(proto && proto->GetScriptableInfo() != mScriptableInfo)))
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{
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delete mScriptableInfo;
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mScriptableInfo = nsnull;
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}
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mMaybeScope = nsnull;
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}
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// This makes IsValid return false from now on...
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mFlatJSObject = nsnull;
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NS_ASSERTION(mIdentity, "bad pointer!");
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@ -1218,7 +1248,7 @@ XPCWrappedNative::ReparentWrapperIfFound(XPCCallContext& ccx,
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oldMap->Remove(wrapper);
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if(wrapper->HasProto())
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wrapper->mMaybeProto = newProto;
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wrapper->SetProto(newProto);
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// If the wrapper has no scriptable or it has a non-shared
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// scriptable, then we don't need to mess with it.
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@ -2662,7 +2692,7 @@ NS_IMETHODIMP XPCWrappedNative::RefreshPrototype()
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if(!JS_SetPrototype(ccx, GetFlatJSObject(), newProto->GetJSProtoObject()))
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return UnexpectedFailure(NS_ERROR_FAILURE);
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mMaybeProto = newProto;
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SetProto(newProto);
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if(mScriptableInfo == oldProto->GetScriptableInfo())
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mScriptableInfo = newProto->GetScriptableInfo();
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@ -2687,13 +2717,14 @@ NS_IMETHODIMP XPCWrappedNative::DebugDump(PRInt16 depth)
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if(HasProto())
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{
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if(depth && mMaybeProto)
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mMaybeProto->DebugDump(depth);
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XPCWrappedNativeProto* proto = GetProto();
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if(depth && proto)
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proto->DebugDump(depth);
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else
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XPC_LOG_ALWAYS(("mMaybeProto @ %x", mMaybeProto));
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XPC_LOG_ALWAYS(("mMaybeProto @ %x", proto));
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}
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else
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XPC_LOG_ALWAYS(("Scope @ %x", UnTagScope(mMaybeScope)));
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XPC_LOG_ALWAYS(("Scope @ %x", GetScope()));
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if(depth && mSet)
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mSet->DebugDump(depth);
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@ -355,7 +355,7 @@ WrappedNativeJSGCThingTracer(JSDHashTable *table, JSDHashEntryHdr *hdr,
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uint32 number, void *arg)
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{
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XPCWrappedNative* wrapper = ((Native2WrappedNativeMap::Entry*)hdr)->value;
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if(wrapper->HasExternalReference())
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if(wrapper->HasExternalReference() && !wrapper->IsWrapperExpired())
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{
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JSTracer* trc = (JSTracer *)arg;
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JS_CALL_OBJECT_TRACER(trc, wrapper->GetFlatJSObject(),
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