зеркало из https://github.com/mozilla/gecko-dev.git
367 строки
11 KiB
C++
367 строки
11 KiB
C++
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* vim: set ts=2 sw=2 et tw=80: */
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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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#include "mozilla/DebugOnly.h"
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#include "nsXBLDocumentInfo.h"
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#include "nsIDocument.h"
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#include "nsXBLPrototypeBinding.h"
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#include "nsIScriptObjectPrincipal.h"
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#include "nsIScriptContext.h"
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#include "nsIDOMDocument.h"
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#include "nsIDOMScriptObjectFactory.h"
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#include "jsapi.h"
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#include "jsfriendapi.h"
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#include "nsIURI.h"
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#include "nsIConsoleService.h"
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#include "nsIScriptError.h"
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#include "nsIChromeRegistry.h"
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#include "nsIPrincipal.h"
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#include "nsJSPrincipals.h"
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#include "nsIScriptSecurityManager.h"
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#include "nsContentUtils.h"
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#include "nsCxPusher.h"
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#include "nsDOMJSUtils.h"
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#include "mozilla/Services.h"
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#include "xpcpublic.h"
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#include "mozilla/scache/StartupCache.h"
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#include "mozilla/scache/StartupCacheUtils.h"
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#include "nsCCUncollectableMarker.h"
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#include "mozilla/dom/BindingUtils.h"
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#include "mozilla/dom/URL.h"
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using namespace mozilla;
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using namespace mozilla::scache;
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using namespace mozilla::dom;
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static const char kXBLCachePrefix[] = "xblcache";
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/* Implementation file */
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static PLDHashOperator
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TraverseProtos(const nsACString &aKey, nsXBLPrototypeBinding *aProto, void* aClosure)
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{
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nsCycleCollectionTraversalCallback *cb =
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static_cast<nsCycleCollectionTraversalCallback*>(aClosure);
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aProto->Traverse(*cb);
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return PL_DHASH_NEXT;
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}
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static PLDHashOperator
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UnlinkProtoJSObjects(const nsACString &aKey, nsXBLPrototypeBinding *aProto, void* aClosure)
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{
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aProto->UnlinkJSObjects();
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return PL_DHASH_NEXT;
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}
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struct ProtoTracer
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{
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const TraceCallbacks &mCallbacks;
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void *mClosure;
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};
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static PLDHashOperator
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TraceProtos(const nsACString &aKey, nsXBLPrototypeBinding *aProto, void* aClosure)
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{
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ProtoTracer* closure = static_cast<ProtoTracer*>(aClosure);
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aProto->Trace(closure->mCallbacks, closure->mClosure);
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return PL_DHASH_NEXT;
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}
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NS_IMPL_CYCLE_COLLECTION_CLASS(nsXBLDocumentInfo)
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NS_IMPL_CYCLE_COLLECTION_UNLINK_BEGIN(nsXBLDocumentInfo)
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if (tmp->mBindingTable) {
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tmp->mBindingTable->EnumerateRead(UnlinkProtoJSObjects, nullptr);
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}
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NS_IMPL_CYCLE_COLLECTION_UNLINK(mDocument)
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NS_IMPL_CYCLE_COLLECTION_UNLINK_END
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NS_IMPL_CYCLE_COLLECTION_TRAVERSE_BEGIN(nsXBLDocumentInfo)
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if (tmp->mDocument &&
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nsCCUncollectableMarker::InGeneration(cb, tmp->mDocument->GetMarkedCCGeneration())) {
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NS_IMPL_CYCLE_COLLECTION_TRAVERSE_SCRIPT_OBJECTS
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return NS_SUCCESS_INTERRUPTED_TRAVERSE;
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}
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NS_IMPL_CYCLE_COLLECTION_TRAVERSE(mDocument)
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if (tmp->mBindingTable) {
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tmp->mBindingTable->EnumerateRead(TraverseProtos, &cb);
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}
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NS_IMPL_CYCLE_COLLECTION_TRAVERSE_SCRIPT_OBJECTS
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NS_IMPL_CYCLE_COLLECTION_TRAVERSE_END
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NS_IMPL_CYCLE_COLLECTION_TRACE_BEGIN(nsXBLDocumentInfo)
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if (tmp->mBindingTable) {
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ProtoTracer closure = { aCallbacks, aClosure };
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tmp->mBindingTable->EnumerateRead(TraceProtos, &closure);
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}
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NS_IMPL_CYCLE_COLLECTION_TRACE_END
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static void
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UnmarkXBLJSObject(void* aP, const char* aName, void* aClosure)
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{
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JS::ExposeObjectToActiveJS(static_cast<JSObject*>(aP));
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}
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static PLDHashOperator
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UnmarkProtos(const nsACString &aKey, nsXBLPrototypeBinding *aProto, void* aClosure)
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{
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aProto->Trace(TraceCallbackFunc(UnmarkXBLJSObject), nullptr);
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return PL_DHASH_NEXT;
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}
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void
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nsXBLDocumentInfo::MarkInCCGeneration(uint32_t aGeneration)
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{
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if (mDocument) {
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mDocument->MarkUncollectableForCCGeneration(aGeneration);
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}
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// Unmark any JS we hold
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if (mBindingTable) {
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mBindingTable->EnumerateRead(UnmarkProtos, nullptr);
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}
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}
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NS_INTERFACE_MAP_BEGIN_CYCLE_COLLECTION(nsXBLDocumentInfo)
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NS_INTERFACE_MAP_ENTRY(nsISupportsWeakReference)
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NS_INTERFACE_MAP_ENTRY(nsISupports)
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NS_INTERFACE_MAP_END
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NS_IMPL_CYCLE_COLLECTING_ADDREF(nsXBLDocumentInfo)
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NS_IMPL_CYCLE_COLLECTING_RELEASE(nsXBLDocumentInfo)
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nsXBLDocumentInfo::nsXBLDocumentInfo(nsIDocument* aDocument)
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: mDocument(aDocument),
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mScriptAccess(true),
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mIsChrome(false),
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mFirstBinding(nullptr)
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{
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nsIURI* uri = aDocument->GetDocumentURI();
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if (IsChromeURI(uri)) {
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// Cache whether or not this chrome XBL can execute scripts.
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nsCOMPtr<nsIXULChromeRegistry> reg =
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mozilla::services::GetXULChromeRegistryService();
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if (reg) {
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bool allow = true;
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reg->AllowScriptsForPackage(uri, &allow);
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mScriptAccess = allow;
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}
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mIsChrome = true;
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} else {
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// If this binding isn't running with system principal, then it's running
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// from a remote-XUL whitelisted domain. This is already a not-really-
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// supported configuration (among other things, we don't use XBL scopes in
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// that configuration for compatibility reasons). But we should still at
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// least make an effort to prevent binding code from running if content
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// script is disabled or if the source domain is blacklisted (since the
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// source domain for remote XBL must always be the same as the source domain
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// of the bound content).
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//
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// If we just ask the binding document if script is enabled, it will
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// discover that it has no inner window, and return false. So instead, we
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// short-circuit the normal compartment-managed script-disabling machinery,
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// and query the policy for the URI directly.
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bool allow;
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nsIScriptSecurityManager* ssm = nsContentUtils::GetSecurityManager();
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nsresult rv = ssm->PolicyAllowsScript(uri, &allow);
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mScriptAccess = NS_SUCCEEDED(rv) && allow;
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}
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}
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nsXBLDocumentInfo::~nsXBLDocumentInfo()
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{
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mozilla::DropJSObjects(this);
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}
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nsXBLPrototypeBinding*
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nsXBLDocumentInfo::GetPrototypeBinding(const nsACString& aRef)
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{
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if (!mBindingTable)
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return nullptr;
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if (aRef.IsEmpty()) {
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// Return our first binding
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return mFirstBinding;
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}
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return mBindingTable->Get(aRef);
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}
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nsresult
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nsXBLDocumentInfo::SetPrototypeBinding(const nsACString& aRef, nsXBLPrototypeBinding* aBinding)
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{
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if (!mBindingTable) {
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mBindingTable = new nsClassHashtable<nsCStringHashKey, nsXBLPrototypeBinding>();
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mozilla::HoldJSObjects(this);
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}
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NS_ENSURE_STATE(!mBindingTable->Get(aRef));
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mBindingTable->Put(aRef, aBinding);
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return NS_OK;
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}
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void
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nsXBLDocumentInfo::RemovePrototypeBinding(const nsACString& aRef)
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{
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if (mBindingTable) {
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nsAutoPtr<nsXBLPrototypeBinding> bindingToRemove;
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mBindingTable->RemoveAndForget(aRef, bindingToRemove);
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// We do not want to destroy the binding, so just forget it.
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bindingToRemove.forget();
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}
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}
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// Callback to enumerate over the bindings from this document and write them
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// out to the cache.
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static PLDHashOperator
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WriteBinding(const nsACString &aKey, nsXBLPrototypeBinding *aProto, void* aClosure)
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{
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aProto->Write((nsIObjectOutputStream*)aClosure);
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return PL_DHASH_NEXT;
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}
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// static
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nsresult
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nsXBLDocumentInfo::ReadPrototypeBindings(nsIURI* aURI, nsXBLDocumentInfo** aDocInfo)
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{
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*aDocInfo = nullptr;
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nsAutoCString spec(kXBLCachePrefix);
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nsresult rv = PathifyURI(aURI, spec);
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NS_ENSURE_SUCCESS(rv, rv);
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StartupCache* startupCache = StartupCache::GetSingleton();
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NS_ENSURE_TRUE(startupCache, NS_ERROR_FAILURE);
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nsAutoArrayPtr<char> buf;
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uint32_t len;
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rv = startupCache->GetBuffer(spec.get(), getter_Transfers(buf), &len);
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// GetBuffer will fail if the binding is not in the cache.
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if (NS_FAILED(rv))
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return rv;
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nsCOMPtr<nsIObjectInputStream> stream;
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rv = NewObjectInputStreamFromBuffer(buf, len, getter_AddRefs(stream));
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NS_ENSURE_SUCCESS(rv, rv);
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buf.forget();
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// The file compatibility.ini stores the build id. This is checked in
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// nsAppRunner.cpp and will delete the cache if a different build is
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// present. However, we check that the version matches here to be safe.
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uint32_t version;
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rv = stream->Read32(&version);
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NS_ENSURE_SUCCESS(rv, rv);
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if (version != XBLBinding_Serialize_Version) {
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// The version that exists is different than expected, likely created with a
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// different build, so invalidate the cache.
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startupCache->InvalidateCache();
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return NS_ERROR_NOT_AVAILABLE;
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}
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nsCOMPtr<nsIPrincipal> principal;
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nsContentUtils::GetSecurityManager()->
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GetSystemPrincipal(getter_AddRefs(principal));
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nsCOMPtr<nsIDOMDocument> domdoc;
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rv = NS_NewXBLDocument(getter_AddRefs(domdoc), aURI, nullptr, principal);
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NS_ENSURE_SUCCESS(rv, rv);
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nsCOMPtr<nsIDocument> doc = do_QueryInterface(domdoc);
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NS_ASSERTION(doc, "Must have a document!");
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nsRefPtr<nsXBLDocumentInfo> docInfo = new nsXBLDocumentInfo(doc);
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while (1) {
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uint8_t flags;
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nsresult rv = stream->Read8(&flags);
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NS_ENSURE_SUCCESS(rv, rv);
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if (flags == XBLBinding_Serialize_NoMoreBindings)
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break;
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rv = nsXBLPrototypeBinding::ReadNewBinding(stream, docInfo, doc, flags);
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if (NS_FAILED(rv)) {
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return rv;
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}
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}
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docInfo.swap(*aDocInfo);
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return NS_OK;
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}
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nsresult
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nsXBLDocumentInfo::WritePrototypeBindings()
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{
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// Only write out bindings with the system principal
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if (!nsContentUtils::IsSystemPrincipal(mDocument->NodePrincipal()))
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return NS_OK;
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nsAutoCString spec(kXBLCachePrefix);
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nsresult rv = PathifyURI(DocumentURI(), spec);
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NS_ENSURE_SUCCESS(rv, rv);
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StartupCache* startupCache = StartupCache::GetSingleton();
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NS_ENSURE_TRUE(startupCache, rv);
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nsCOMPtr<nsIObjectOutputStream> stream;
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nsCOMPtr<nsIStorageStream> storageStream;
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rv = NewObjectOutputWrappedStorageStream(getter_AddRefs(stream),
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getter_AddRefs(storageStream),
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true);
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NS_ENSURE_SUCCESS(rv, rv);
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rv = stream->Write32(XBLBinding_Serialize_Version);
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NS_ENSURE_SUCCESS(rv, rv);
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if (mBindingTable) {
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mBindingTable->EnumerateRead(WriteBinding, stream);
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}
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// write a end marker at the end
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rv = stream->Write8(XBLBinding_Serialize_NoMoreBindings);
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NS_ENSURE_SUCCESS(rv, rv);
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stream->Close();
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NS_ENSURE_SUCCESS(rv, rv);
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uint32_t len;
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nsAutoArrayPtr<char> buf;
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rv = NewBufferFromStorageStream(storageStream, getter_Transfers(buf), &len);
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NS_ENSURE_SUCCESS(rv, rv);
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return startupCache->PutBuffer(spec.get(), buf, len);
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}
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void
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nsXBLDocumentInfo::SetFirstPrototypeBinding(nsXBLPrototypeBinding* aBinding)
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{
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mFirstBinding = aBinding;
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}
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static PLDHashOperator
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FlushScopedSkinSheets(const nsACString &aKey, nsXBLPrototypeBinding *aProto, void* aClosure)
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{
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aProto->FlushSkinSheets();
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return PL_DHASH_NEXT;
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}
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void
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nsXBLDocumentInfo::FlushSkinStylesheets()
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{
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if (mBindingTable) {
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mBindingTable->EnumerateRead(FlushScopedSkinSheets, nullptr);
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}
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}
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#ifdef DEBUG
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void
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AssertInCompilationScope()
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{
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AutoJSContext cx;
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// Note - Inverting the order of these operands is a rooting hazard.
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MOZ_ASSERT(xpc::GetCompilationScope() == JS::CurrentGlobalOrNull(cx));
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}
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#endif
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