/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */ /* 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 nsWrapperCache_h___ #define nsWrapperCache_h___ #include "nsCycleCollectionParticipant.h" #include "mozilla/Assertions.h" class JSObject; struct JSContext; class XPCWrappedNativeScope; namespace mozilla { namespace dom { namespace workers { class DOMBindingBase; } // namespace workers } // namespace dom } // namespace mozilla #define NS_WRAPPERCACHE_IID \ { 0x6f3179a1, 0x36f7, 0x4a5c, \ { 0x8c, 0xf1, 0xad, 0xc8, 0x7c, 0xde, 0x3e, 0x87 } } /** * Class to store the wrapper for an object. This can only be used with objects * that only have one non-security wrapper at a time (for an XPCWrappedNative * this is usually ensured by setting an explicit parent in the PreCreate hook * for the class). * * An instance of nsWrapperCache can be gotten from an object that implements * a wrapper cache by calling QueryInterface on it. Note that this breaks XPCOM * rules a bit (this object doesn't derive from nsISupports). * * The cache can store objects other than wrappers. We allow wrappers to use a * separate JSObject to store their state (mostly expandos). If the wrapper is * collected and we want to preserve this state we actually store the state * object in the cache. * * The cache can store 2 types of objects: * * If WRAPPER_IS_DOM_BINDING is not set (IsDOMBinding() returns false): * - a slim wrapper or the JSObject of an XPCWrappedNative wrapper * * If WRAPPER_IS_DOM_BINDING is set (IsDOMBinding() returns true): * - a DOM binding object (regular JS object or proxy) * * The finalizer for the wrapper clears the cache. * * A number of the methods are implemented in nsWrapperCacheInlines.h because we * have to include some JS headers that don't play nicely with the rest of the * codebase. Include nsWrapperCacheInlines.h if you need to call those methods. */ class nsWrapperCache { friend class mozilla::dom::workers::DOMBindingBase; public: NS_DECLARE_STATIC_IID_ACCESSOR(NS_WRAPPERCACHE_IID) nsWrapperCache() : mWrapperPtrBits(0) { } ~nsWrapperCache() { MOZ_ASSERT(!PreservingWrapper(), "Destroying cache with a preserved wrapper!"); } /** * Get the cached wrapper. * * This getter clears the gray bit before handing out the JSObject which means * that the object is guaranteed to be kept alive past the next CC. */ JSObject* GetWrapper() const; /** * Get the cached wrapper. * * This getter does not change the color of the JSObject meaning that the * object returned is not guaranteed to be kept alive past the next CC. * * This should only be called if you are certain that the return value won't * be passed into a JS API function and that it won't be stored without being * rooted (or otherwise signaling the stored value to the CC). */ JSObject* GetWrapperPreserveColor() const { return GetJSObjectFromBits(); } void SetWrapper(JSObject* aWrapper) { MOZ_ASSERT(!PreservingWrapper(), "Clearing a preserved wrapper!"); MOZ_ASSERT(aWrapper, "Use ClearWrapper!"); SetWrapperBits(aWrapper); } /** * Clear the wrapper. This should be called from the finalizer for the * wrapper. */ void ClearWrapper() { MOZ_ASSERT(!PreservingWrapper(), "Clearing a preserved wrapper!"); SetWrapperBits(NULL); } bool PreservingWrapper() { return (mWrapperPtrBits & WRAPPER_BIT_PRESERVED) != 0; } void SetIsDOMBinding() { MOZ_ASSERT(!mWrapperPtrBits, "This flag should be set before creating any wrappers."); mWrapperPtrBits = WRAPPER_IS_DOM_BINDING; } bool IsDOMBinding() const { return (mWrapperPtrBits & WRAPPER_IS_DOM_BINDING) != 0; } void SetHasSystemOnlyWrapper() { MOZ_ASSERT(GetWrapperPreserveColor(), "This flag should be set after wrapper creation."); MOZ_ASSERT(IsDOMBinding(), "This flag should only be set for DOM bindings."); mWrapperPtrBits |= WRAPPER_HAS_SOW; } bool HasSystemOnlyWrapper() const { return (mWrapperPtrBits & WRAPPER_HAS_SOW) != 0; } /** * Wrap the object corresponding to this wrapper cache. If non-null is * returned, the object has already been stored in the wrapper cache. */ virtual JSObject* WrapObject(JSContext *cx, JSObject *scope) { MOZ_ASSERT(!IsDOMBinding(), "Someone forgot to override WrapObject"); return nullptr; } /** * Returns true if the object has a non-gray wrapper. */ bool IsBlack(); /** * Returns true if the object has a black wrapper, * and all the GC things it is keeping alive are black too. */ bool IsBlackAndDoesNotNeedTracing(nsISupports* aThis); // Only meant to be called by code that preserves a wrapper. void SetPreservingWrapper(bool aPreserve) { if(aPreserve) { mWrapperPtrBits |= WRAPPER_BIT_PRESERVED; } else { mWrapperPtrBits &= ~WRAPPER_BIT_PRESERVED; } } private: JSObject *GetJSObjectFromBits() const { return reinterpret_cast(mWrapperPtrBits & ~kWrapperBitMask); } void SetWrapperBits(void *aWrapper) { mWrapperPtrBits = reinterpret_cast(aWrapper) | (mWrapperPtrBits & WRAPPER_IS_DOM_BINDING); } /** * If this bit is set then we're preserving the wrapper, which in effect ties * the lifetime of the JS object stored in the cache to the lifetime of the * native object. We rely on the cycle collector to break the cycle that this * causes between the native object and the JS object, so it is important that * any native object that supports preserving of its wrapper * traces/traverses/unlinks the cached JS object (see * NS_IMPL_CYCLE_COLLECTION_TRACE_PRESERVED_WRAPPER, * NS_IMPL_CYCLE_COLLECTION_TRAVERSE_SCRIPT_OBJECTS and * NS_IMPL_CYCLE_COLLECTION_UNLINK_PRESERVED_WRAPPER). */ enum { WRAPPER_BIT_PRESERVED = 1 << 0 }; /** * If this bit is set then the wrapper for the native object is a DOM binding * (regular JS object or proxy). */ enum { WRAPPER_IS_DOM_BINDING = 1 << 1 }; /** * If this bit is set then the wrapper for the native object is a DOM binding * (regular JS object or proxy) that has a system only wrapper for same-origin * access. */ enum { WRAPPER_HAS_SOW = 1 << 2 }; enum { kWrapperBitMask = (WRAPPER_BIT_PRESERVED | WRAPPER_IS_DOM_BINDING | WRAPPER_HAS_SOW) }; uintptr_t mWrapperPtrBits; }; NS_DEFINE_STATIC_IID_ACCESSOR(nsWrapperCache, NS_WRAPPERCACHE_IID) #define NS_WRAPPERCACHE_INTERFACE_MAP_ENTRY \ if ( aIID.Equals(NS_GET_IID(nsWrapperCache)) ) { \ *aInstancePtr = static_cast(this); \ return NS_OK; \ } // Cycle collector macros for wrapper caches. #define NS_IMPL_CYCLE_COLLECTION_TRACE_PRESERVED_WRAPPER \ nsContentUtils::TraceWrapper(tmp, aCallback, aClosure); #define NS_IMPL_CYCLE_COLLECTION_UNLINK_PRESERVED_WRAPPER \ nsContentUtils::ReleaseWrapper(p, tmp); #define NS_IMPL_CYCLE_COLLECTION_TRACE_WRAPPERCACHE(_class) \ NS_IMPL_CYCLE_COLLECTION_TRACE_BEGIN(_class) \ NS_IMPL_CYCLE_COLLECTION_TRACE_PRESERVED_WRAPPER \ NS_IMPL_CYCLE_COLLECTION_TRACE_END #define NS_IMPL_CYCLE_COLLECTION_WRAPPERCACHE_0(_class) \ NS_IMPL_CYCLE_COLLECTION_UNLINK_BEGIN(_class) \ NS_IMPL_CYCLE_COLLECTION_UNLINK_PRESERVED_WRAPPER \ NS_IMPL_CYCLE_COLLECTION_UNLINK_END \ NS_IMPL_CYCLE_COLLECTION_TRAVERSE_BEGIN(_class) \ NS_IMPL_CYCLE_COLLECTION_TRAVERSE_SCRIPT_OBJECTS \ NS_IMPL_CYCLE_COLLECTION_TRAVERSE_END \ NS_IMPL_CYCLE_COLLECTION_TRACE_WRAPPERCACHE(_class) #define NS_IMPL_CYCLE_COLLECTION_WRAPPERCACHE_1(_class, _field) \ NS_IMPL_CYCLE_COLLECTION_UNLINK_BEGIN(_class) \ NS_IMPL_CYCLE_COLLECTION_UNLINK(_field) \ NS_IMPL_CYCLE_COLLECTION_UNLINK_PRESERVED_WRAPPER \ NS_IMPL_CYCLE_COLLECTION_UNLINK_END \ NS_IMPL_CYCLE_COLLECTION_TRAVERSE_BEGIN(_class) \ NS_IMPL_CYCLE_COLLECTION_TRAVERSE(_field) \ NS_IMPL_CYCLE_COLLECTION_TRAVERSE_SCRIPT_OBJECTS \ NS_IMPL_CYCLE_COLLECTION_TRAVERSE_END \ NS_IMPL_CYCLE_COLLECTION_TRACE_WRAPPERCACHE(_class) #define NS_IMPL_CYCLE_COLLECTION_WRAPPERCACHE_2(_class, _field1,\ _field2) \ NS_IMPL_CYCLE_COLLECTION_UNLINK_BEGIN(_class) \ NS_IMPL_CYCLE_COLLECTION_UNLINK(_field1) \ NS_IMPL_CYCLE_COLLECTION_UNLINK(_field2) \ NS_IMPL_CYCLE_COLLECTION_UNLINK_PRESERVED_WRAPPER \ NS_IMPL_CYCLE_COLLECTION_UNLINK_END \ NS_IMPL_CYCLE_COLLECTION_TRAVERSE_BEGIN(_class) \ NS_IMPL_CYCLE_COLLECTION_TRAVERSE(_field1) \ NS_IMPL_CYCLE_COLLECTION_TRAVERSE(_field2) \ NS_IMPL_CYCLE_COLLECTION_TRAVERSE_SCRIPT_OBJECTS \ NS_IMPL_CYCLE_COLLECTION_TRAVERSE_END \ NS_IMPL_CYCLE_COLLECTION_TRACE_WRAPPERCACHE(_class) #define NS_IMPL_CYCLE_COLLECTION_WRAPPERCACHE_3(_class, _field1,\ _field2, \ _field3) \ NS_IMPL_CYCLE_COLLECTION_UNLINK_BEGIN(_class) \ NS_IMPL_CYCLE_COLLECTION_UNLINK(_field1) \ NS_IMPL_CYCLE_COLLECTION_UNLINK(_field2) \ NS_IMPL_CYCLE_COLLECTION_UNLINK(_field3) \ NS_IMPL_CYCLE_COLLECTION_UNLINK_PRESERVED_WRAPPER \ NS_IMPL_CYCLE_COLLECTION_UNLINK_END \ NS_IMPL_CYCLE_COLLECTION_TRAVERSE_BEGIN(_class) \ NS_IMPL_CYCLE_COLLECTION_TRAVERSE(_field1) \ NS_IMPL_CYCLE_COLLECTION_TRAVERSE(_field2) \ NS_IMPL_CYCLE_COLLECTION_TRAVERSE(_field3) \ NS_IMPL_CYCLE_COLLECTION_TRAVERSE_SCRIPT_OBJECTS \ NS_IMPL_CYCLE_COLLECTION_TRAVERSE_END \ NS_IMPL_CYCLE_COLLECTION_TRACE_WRAPPERCACHE(_class) #define NS_IMPL_CYCLE_COLLECTION_WRAPPERCACHE_4(_class, _field1,\ _field2, \ _field3, \ _field4) \ NS_IMPL_CYCLE_COLLECTION_UNLINK_BEGIN(_class) \ NS_IMPL_CYCLE_COLLECTION_UNLINK(_field1) \ NS_IMPL_CYCLE_COLLECTION_UNLINK(_field2) \ NS_IMPL_CYCLE_COLLECTION_UNLINK(_field3) \ NS_IMPL_CYCLE_COLLECTION_UNLINK(_field4) \ NS_IMPL_CYCLE_COLLECTION_UNLINK_PRESERVED_WRAPPER \ NS_IMPL_CYCLE_COLLECTION_UNLINK_END \ NS_IMPL_CYCLE_COLLECTION_TRAVERSE_BEGIN(_class) \ NS_IMPL_CYCLE_COLLECTION_TRAVERSE(_field1) \ NS_IMPL_CYCLE_COLLECTION_TRAVERSE(_field2) \ NS_IMPL_CYCLE_COLLECTION_TRAVERSE(_field3) \ NS_IMPL_CYCLE_COLLECTION_TRAVERSE(_field4) \ NS_IMPL_CYCLE_COLLECTION_TRAVERSE_SCRIPT_OBJECTS \ NS_IMPL_CYCLE_COLLECTION_TRAVERSE_END \ NS_IMPL_CYCLE_COLLECTION_TRACE_WRAPPERCACHE(_class) #define NS_IMPL_CYCLE_COLLECTION_WRAPPERCACHE_5(_class, _field1,\ _field2, \ _field3, \ _field4, \ _field5) \ NS_IMPL_CYCLE_COLLECTION_UNLINK_BEGIN(_class) \ NS_IMPL_CYCLE_COLLECTION_UNLINK(_field1) \ NS_IMPL_CYCLE_COLLECTION_UNLINK(_field2) \ NS_IMPL_CYCLE_COLLECTION_UNLINK(_field3) \ NS_IMPL_CYCLE_COLLECTION_UNLINK(_field4) \ NS_IMPL_CYCLE_COLLECTION_UNLINK(_field5) \ NS_IMPL_CYCLE_COLLECTION_UNLINK_PRESERVED_WRAPPER \ NS_IMPL_CYCLE_COLLECTION_UNLINK_END \ NS_IMPL_CYCLE_COLLECTION_TRAVERSE_BEGIN(_class) \ NS_IMPL_CYCLE_COLLECTION_TRAVERSE(_field1) \ NS_IMPL_CYCLE_COLLECTION_TRAVERSE(_field2) \ NS_IMPL_CYCLE_COLLECTION_TRAVERSE(_field3) \ NS_IMPL_CYCLE_COLLECTION_TRAVERSE(_field4) \ NS_IMPL_CYCLE_COLLECTION_TRAVERSE(_field5) \ NS_IMPL_CYCLE_COLLECTION_TRAVERSE_SCRIPT_OBJECTS \ NS_IMPL_CYCLE_COLLECTION_TRAVERSE_END \ NS_IMPL_CYCLE_COLLECTION_TRACE_WRAPPERCACHE(_class) #define NS_IMPL_CYCLE_COLLECTION_WRAPPERCACHE_6(_class, _field1,\ _field2, \ _field3, \ _field4, \ _field5, \ _field6) \ NS_IMPL_CYCLE_COLLECTION_UNLINK_BEGIN(_class) \ NS_IMPL_CYCLE_COLLECTION_UNLINK(_field1) \ NS_IMPL_CYCLE_COLLECTION_UNLINK(_field2) \ NS_IMPL_CYCLE_COLLECTION_UNLINK(_field3) \ NS_IMPL_CYCLE_COLLECTION_UNLINK(_field4) \ NS_IMPL_CYCLE_COLLECTION_UNLINK(_field5) \ NS_IMPL_CYCLE_COLLECTION_UNLINK(_field6) \ NS_IMPL_CYCLE_COLLECTION_UNLINK_PRESERVED_WRAPPER \ NS_IMPL_CYCLE_COLLECTION_UNLINK_END \ NS_IMPL_CYCLE_COLLECTION_TRAVERSE_BEGIN(_class) \ NS_IMPL_CYCLE_COLLECTION_TRAVERSE(_field1) \ NS_IMPL_CYCLE_COLLECTION_TRAVERSE(_field2) \ NS_IMPL_CYCLE_COLLECTION_TRAVERSE(_field3) \ NS_IMPL_CYCLE_COLLECTION_TRAVERSE(_field4) \ NS_IMPL_CYCLE_COLLECTION_TRAVERSE(_field5) \ NS_IMPL_CYCLE_COLLECTION_TRAVERSE(_field6) \ NS_IMPL_CYCLE_COLLECTION_TRAVERSE_SCRIPT_OBJECTS \ NS_IMPL_CYCLE_COLLECTION_TRAVERSE_END \ NS_IMPL_CYCLE_COLLECTION_TRACE_WRAPPERCACHE(_class) #define NS_IMPL_CYCLE_COLLECTION_WRAPPERCACHE_7(_class, _field1,\ _field2, \ _field3, \ _field4, \ _field5, \ _field6, \ _field7) \ NS_IMPL_CYCLE_COLLECTION_UNLINK_BEGIN(_class) \ NS_IMPL_CYCLE_COLLECTION_UNLINK(_field1) \ NS_IMPL_CYCLE_COLLECTION_UNLINK(_field2) \ NS_IMPL_CYCLE_COLLECTION_UNLINK(_field3) \ NS_IMPL_CYCLE_COLLECTION_UNLINK(_field4) \ NS_IMPL_CYCLE_COLLECTION_UNLINK(_field5) \ NS_IMPL_CYCLE_COLLECTION_UNLINK(_field6) \ NS_IMPL_CYCLE_COLLECTION_UNLINK(_field7) \ NS_IMPL_CYCLE_COLLECTION_UNLINK_PRESERVED_WRAPPER \ NS_IMPL_CYCLE_COLLECTION_UNLINK_END \ NS_IMPL_CYCLE_COLLECTION_TRAVERSE_BEGIN(_class) \ NS_IMPL_CYCLE_COLLECTION_TRAVERSE(_field1) \ NS_IMPL_CYCLE_COLLECTION_TRAVERSE(_field2) \ NS_IMPL_CYCLE_COLLECTION_TRAVERSE(_field3) \ NS_IMPL_CYCLE_COLLECTION_TRAVERSE(_field4) \ NS_IMPL_CYCLE_COLLECTION_TRAVERSE(_field5) \ NS_IMPL_CYCLE_COLLECTION_TRAVERSE(_field6) \ NS_IMPL_CYCLE_COLLECTION_TRAVERSE(_field7) \ NS_IMPL_CYCLE_COLLECTION_TRAVERSE_SCRIPT_OBJECTS \ NS_IMPL_CYCLE_COLLECTION_TRAVERSE_END \ NS_IMPL_CYCLE_COLLECTION_TRACE_WRAPPERCACHE(_class) #define NS_IMPL_CYCLE_COLLECTION_WRAPPERCACHE_8(_class, _field1,\ _field2, \ _field3, \ _field4, \ _field5, \ _field6, \ _field7, \ _field8) \ NS_IMPL_CYCLE_COLLECTION_UNLINK_BEGIN(_class) \ NS_IMPL_CYCLE_COLLECTION_UNLINK(_field1) \ NS_IMPL_CYCLE_COLLECTION_UNLINK(_field2) \ NS_IMPL_CYCLE_COLLECTION_UNLINK(_field3) \ NS_IMPL_CYCLE_COLLECTION_UNLINK(_field4) \ NS_IMPL_CYCLE_COLLECTION_UNLINK(_field5) \ NS_IMPL_CYCLE_COLLECTION_UNLINK(_field6) \ NS_IMPL_CYCLE_COLLECTION_UNLINK(_field7) \ NS_IMPL_CYCLE_COLLECTION_UNLINK(_field8) \ NS_IMPL_CYCLE_COLLECTION_UNLINK_PRESERVED_WRAPPER \ NS_IMPL_CYCLE_COLLECTION_UNLINK_END \ NS_IMPL_CYCLE_COLLECTION_TRAVERSE_BEGIN(_class) \ NS_IMPL_CYCLE_COLLECTION_TRAVERSE(_field1) \ NS_IMPL_CYCLE_COLLECTION_TRAVERSE(_field2) \ NS_IMPL_CYCLE_COLLECTION_TRAVERSE(_field3) \ NS_IMPL_CYCLE_COLLECTION_TRAVERSE(_field4) \ NS_IMPL_CYCLE_COLLECTION_TRAVERSE(_field5) \ NS_IMPL_CYCLE_COLLECTION_TRAVERSE(_field6) \ NS_IMPL_CYCLE_COLLECTION_TRAVERSE(_field7) \ NS_IMPL_CYCLE_COLLECTION_TRAVERSE(_field8) \ NS_IMPL_CYCLE_COLLECTION_TRAVERSE_SCRIPT_OBJECTS \ NS_IMPL_CYCLE_COLLECTION_TRAVERSE_END \ NS_IMPL_CYCLE_COLLECTION_TRACE_WRAPPERCACHE(_class) #define NS_IMPL_CYCLE_COLLECTION_WRAPPERCACHE_9(_class, _field1,\ _field2, \ _field3, \ _field4, \ _field5, \ _field6, \ _field7, \ _field8, \ _field9) \ NS_IMPL_CYCLE_COLLECTION_UNLINK_BEGIN(_class) \ NS_IMPL_CYCLE_COLLECTION_UNLINK(_field1) \ NS_IMPL_CYCLE_COLLECTION_UNLINK(_field2) \ NS_IMPL_CYCLE_COLLECTION_UNLINK(_field3) \ NS_IMPL_CYCLE_COLLECTION_UNLINK(_field4) \ NS_IMPL_CYCLE_COLLECTION_UNLINK(_field5) \ NS_IMPL_CYCLE_COLLECTION_UNLINK(_field6) \ NS_IMPL_CYCLE_COLLECTION_UNLINK(_field7) \ NS_IMPL_CYCLE_COLLECTION_UNLINK(_field8) \ NS_IMPL_CYCLE_COLLECTION_UNLINK(_field9) \ NS_IMPL_CYCLE_COLLECTION_UNLINK_PRESERVED_WRAPPER \ NS_IMPL_CYCLE_COLLECTION_UNLINK_END \ NS_IMPL_CYCLE_COLLECTION_TRAVERSE_BEGIN(_class) \ NS_IMPL_CYCLE_COLLECTION_TRAVERSE(_field1) \ NS_IMPL_CYCLE_COLLECTION_TRAVERSE(_field2) \ NS_IMPL_CYCLE_COLLECTION_TRAVERSE(_field3) \ NS_IMPL_CYCLE_COLLECTION_TRAVERSE(_field4) \ NS_IMPL_CYCLE_COLLECTION_TRAVERSE(_field5) \ NS_IMPL_CYCLE_COLLECTION_TRAVERSE(_field6) \ NS_IMPL_CYCLE_COLLECTION_TRAVERSE(_field7) \ NS_IMPL_CYCLE_COLLECTION_TRAVERSE(_field8) \ NS_IMPL_CYCLE_COLLECTION_TRAVERSE(_field9) \ NS_IMPL_CYCLE_COLLECTION_TRAVERSE_SCRIPT_OBJECTS \ NS_IMPL_CYCLE_COLLECTION_TRAVERSE_END \ NS_IMPL_CYCLE_COLLECTION_TRACE_WRAPPERCACHE(_class) #define NS_IMPL_CYCLE_COLLECTION_WRAPPERCACHE_10(_class, _field1,\ _field2, \ _field3, \ _field4, \ _field5, \ _field6, \ _field7, \ _field8, \ _field9, \ _field10) \ NS_IMPL_CYCLE_COLLECTION_UNLINK_BEGIN(_class) \ NS_IMPL_CYCLE_COLLECTION_UNLINK(_field1) \ NS_IMPL_CYCLE_COLLECTION_UNLINK(_field2) \ NS_IMPL_CYCLE_COLLECTION_UNLINK(_field3) \ NS_IMPL_CYCLE_COLLECTION_UNLINK(_field4) \ NS_IMPL_CYCLE_COLLECTION_UNLINK(_field5) \ NS_IMPL_CYCLE_COLLECTION_UNLINK(_field6) \ NS_IMPL_CYCLE_COLLECTION_UNLINK(_field7) \ NS_IMPL_CYCLE_COLLECTION_UNLINK(_field8) \ NS_IMPL_CYCLE_COLLECTION_UNLINK(_field9) \ NS_IMPL_CYCLE_COLLECTION_UNLINK(_field10) \ NS_IMPL_CYCLE_COLLECTION_UNLINK_PRESERVED_WRAPPER \ NS_IMPL_CYCLE_COLLECTION_UNLINK_END \ NS_IMPL_CYCLE_COLLECTION_TRAVERSE_BEGIN(_class) \ NS_IMPL_CYCLE_COLLECTION_TRAVERSE(_field1) \ NS_IMPL_CYCLE_COLLECTION_TRAVERSE(_field2) \ NS_IMPL_CYCLE_COLLECTION_TRAVERSE(_field3) \ NS_IMPL_CYCLE_COLLECTION_TRAVERSE(_field4) \ NS_IMPL_CYCLE_COLLECTION_TRAVERSE(_field5) \ NS_IMPL_CYCLE_COLLECTION_TRAVERSE(_field6) \ NS_IMPL_CYCLE_COLLECTION_TRAVERSE(_field7) \ NS_IMPL_CYCLE_COLLECTION_TRAVERSE(_field8) \ NS_IMPL_CYCLE_COLLECTION_TRAVERSE(_field9) \ NS_IMPL_CYCLE_COLLECTION_TRAVERSE(_field10) \ NS_IMPL_CYCLE_COLLECTION_TRAVERSE_SCRIPT_OBJECTS \ NS_IMPL_CYCLE_COLLECTION_TRAVERSE_END \ NS_IMPL_CYCLE_COLLECTION_TRACE_WRAPPERCACHE(_class) #endif /* nsWrapperCache_h___ */