зеркало из https://github.com/mozilla/gecko-dev.git
600 строки
16 KiB
C++
600 строки
16 KiB
C++
/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* vim: set ts=8 sts=2 et sw=2 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 "nsXULPrototypeCache.h"
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#include "plstr.h"
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#include "nsXULPrototypeDocument.h"
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#include "nsIServiceManager.h"
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#include "nsIURI.h"
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#include "nsIChromeRegistry.h"
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#include "nsIFile.h"
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#include "nsIObjectInputStream.h"
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#include "nsIObjectOutputStream.h"
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#include "nsIObserverService.h"
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#include "nsIStringStream.h"
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#include "nsIStorageStream.h"
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#include "nsAppDirectoryServiceDefs.h"
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#include "js/TracingAPI.h"
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#include "mozilla/StyleSheetInlines.h"
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#include "mozilla/Preferences.h"
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#include "mozilla/scache/StartupCache.h"
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#include "mozilla/scache/StartupCacheUtils.h"
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#include "mozilla/Telemetry.h"
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using namespace mozilla;
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using namespace mozilla::scache;
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static bool gDisableXULCache = false; // enabled by default
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static const char kDisableXULCachePref[] = "nglayout.debug.disable_xul_cache";
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static const char kXULCacheInfoKey[] = "nsXULPrototypeCache.startupCache";
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static const char kXULCachePrefix[] = "xulcache";
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//----------------------------------------------------------------------
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static void
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UpdategDisableXULCache()
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{
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// Get the value of "nglayout.debug.disable_xul_cache" preference
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gDisableXULCache =
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Preferences::GetBool(kDisableXULCachePref, gDisableXULCache);
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// Sets the flag if the XUL cache is disabled
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if (gDisableXULCache) {
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Telemetry::Accumulate(Telemetry::XUL_CACHE_DISABLED, true);
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}
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}
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static void
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DisableXULCacheChangedCallback(const char* aPref, void* aClosure)
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{
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bool wasEnabled = !gDisableXULCache;
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UpdategDisableXULCache();
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if (wasEnabled && gDisableXULCache) {
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nsXULPrototypeCache* cache = nsXULPrototypeCache::GetInstance();
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if (cache) {
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// AbortCaching() calls Flush() for us.
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cache->AbortCaching();
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}
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}
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}
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//----------------------------------------------------------------------
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nsXULPrototypeCache* nsXULPrototypeCache::sInstance = nullptr;
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nsXULPrototypeCache::nsXULPrototypeCache()
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{
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}
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nsXULPrototypeCache::~nsXULPrototypeCache()
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{
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FlushScripts();
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}
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NS_IMPL_ISUPPORTS(nsXULPrototypeCache, nsIObserver)
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/* static */ nsXULPrototypeCache*
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nsXULPrototypeCache::GetInstance()
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{
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if (!sInstance) {
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NS_ADDREF(sInstance = new nsXULPrototypeCache());
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UpdategDisableXULCache();
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Preferences::RegisterCallback(DisableXULCacheChangedCallback,
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kDisableXULCachePref);
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nsCOMPtr<nsIObserverService> obsSvc =
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mozilla::services::GetObserverService();
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if (obsSvc) {
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nsXULPrototypeCache *p = sInstance;
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obsSvc->AddObserver(p, "chrome-flush-skin-caches", false);
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obsSvc->AddObserver(p, "chrome-flush-caches", false);
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obsSvc->AddObserver(p, NS_XPCOM_SHUTDOWN_OBSERVER_ID, false);
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obsSvc->AddObserver(p, "startupcache-invalidate", false);
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}
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}
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return sInstance;
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}
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//----------------------------------------------------------------------
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NS_IMETHODIMP
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nsXULPrototypeCache::Observe(nsISupports* aSubject,
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const char *aTopic,
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const char16_t *aData)
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{
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if (!strcmp(aTopic, "chrome-flush-skin-caches")) {
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FlushSkinFiles();
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}
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else if (!strcmp(aTopic, "chrome-flush-caches") ||
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!strcmp(aTopic, NS_XPCOM_SHUTDOWN_OBSERVER_ID)) {
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Flush();
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}
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else if (!strcmp(aTopic, "startupcache-invalidate")) {
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AbortCaching();
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}
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else {
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NS_WARNING("Unexpected observer topic.");
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}
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return NS_OK;
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}
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nsXULPrototypeDocument*
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nsXULPrototypeCache::GetPrototype(nsIURI* aURI)
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{
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if (!aURI)
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return nullptr;
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nsCOMPtr<nsIURI> uriWithoutRef;
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aURI->CloneIgnoringRef(getter_AddRefs(uriWithoutRef));
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nsXULPrototypeDocument* protoDoc = mPrototypeTable.GetWeak(uriWithoutRef);
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if (protoDoc)
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return protoDoc;
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nsresult rv = BeginCaching(aURI);
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if (NS_FAILED(rv))
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return nullptr;
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// No prototype in XUL memory cache. Spin up the cache Service.
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nsCOMPtr<nsIObjectInputStream> ois;
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rv = GetInputStream(aURI, getter_AddRefs(ois));
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if (NS_FAILED(rv))
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return nullptr;
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RefPtr<nsXULPrototypeDocument> newProto;
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rv = NS_NewXULPrototypeDocument(getter_AddRefs(newProto));
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if (NS_FAILED(rv))
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return nullptr;
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rv = newProto->Read(ois);
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if (NS_SUCCEEDED(rv)) {
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rv = PutPrototype(newProto);
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} else {
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newProto = nullptr;
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}
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mInputStreamTable.Remove(aURI);
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return newProto;
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}
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nsresult
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nsXULPrototypeCache::PutPrototype(nsXULPrototypeDocument* aDocument)
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{
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if (!aDocument->GetURI()) {
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return NS_ERROR_FAILURE;
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}
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nsCOMPtr<nsIURI> uri;
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aDocument->GetURI()->CloneIgnoringRef(getter_AddRefs(uri));
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// Put() releases any old value and addrefs the new one
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mPrototypeTable.Put(uri, aDocument);
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return NS_OK;
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}
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nsresult
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nsXULPrototypeCache::PutStyleSheet(CSSStyleSheet* aStyleSheet)
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{
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nsIURI* uri = aStyleSheet->GetSheetURI();
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mStyleSheetTable.Put(uri, aStyleSheet);
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return NS_OK;
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}
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JSScript*
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nsXULPrototypeCache::GetScript(nsIURI* aURI)
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{
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return mScriptTable.Get(aURI);
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}
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nsresult
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nsXULPrototypeCache::PutScript(nsIURI* aURI,
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JS::Handle<JSScript*> aScriptObject)
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{
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MOZ_ASSERT(aScriptObject, "Need a non-NULL script");
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#ifdef DEBUG_BUG_392650
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if (mScriptTable.Get(aURI)) {
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nsAutoCString scriptName;
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aURI->GetSpec(scriptName);
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nsAutoCString message("Loaded script ");
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message += scriptName;
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message += " twice (bug 392650)";
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NS_WARNING(message.get());
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}
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#endif
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mScriptTable.Put(aURI, aScriptObject);
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return NS_OK;
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}
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nsresult
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nsXULPrototypeCache::PutXBLDocumentInfo(nsXBLDocumentInfo* aDocumentInfo)
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{
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nsIURI* uri = aDocumentInfo->DocumentURI();
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RefPtr<nsXBLDocumentInfo> info;
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mXBLDocTable.Get(uri, getter_AddRefs(info));
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if (!info) {
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mXBLDocTable.Put(uri, aDocumentInfo);
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}
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return NS_OK;
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}
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void
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nsXULPrototypeCache::FlushSkinFiles()
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{
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// Flush out skin XBL files from the cache.
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for (auto iter = mXBLDocTable.Iter(); !iter.Done(); iter.Next()) {
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nsAutoCString str;
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iter.Key()->GetPath(str);
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if (strncmp(str.get(), "/skin", 5) == 0) {
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iter.Remove();
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}
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}
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// Now flush out our skin stylesheets from the cache.
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for (auto iter = mStyleSheetTable.Iter(); !iter.Done(); iter.Next()) {
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nsAutoCString str;
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iter.Data()->GetSheetURI()->GetPath(str);
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if (strncmp(str.get(), "/skin", 5) == 0) {
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iter.Remove();
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}
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}
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// Iterate over all the remaining XBL and make sure cached
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// scoped skin stylesheets are flushed and refetched by the
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// prototype bindings.
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for (auto iter = mXBLDocTable.Iter(); !iter.Done(); iter.Next()) {
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iter.Data()->FlushSkinStylesheets();
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}
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}
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void
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nsXULPrototypeCache::FlushScripts()
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{
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mScriptTable.Clear();
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}
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void
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nsXULPrototypeCache::Flush()
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{
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mPrototypeTable.Clear();
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mScriptTable.Clear();
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mStyleSheetTable.Clear();
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mXBLDocTable.Clear();
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}
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bool
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nsXULPrototypeCache::IsEnabled()
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{
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return !gDisableXULCache;
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}
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void
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nsXULPrototypeCache::AbortCaching()
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{
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#ifdef DEBUG_brendan
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NS_BREAK();
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#endif
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// Flush the XUL cache for good measure, in case we cached a bogus/downrev
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// script, somehow.
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Flush();
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// Clear the cache set
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mStartupCacheURITable.Clear();
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}
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nsresult
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nsXULPrototypeCache::WritePrototype(nsXULPrototypeDocument* aPrototypeDocument)
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{
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nsresult rv = NS_OK, rv2 = NS_OK;
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if (!StartupCache::GetSingleton())
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return NS_OK;
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nsCOMPtr<nsIURI> protoURI = aPrototypeDocument->GetURI();
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nsCOMPtr<nsIObjectOutputStream> oos;
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rv = GetOutputStream(protoURI, getter_AddRefs(oos));
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NS_ENSURE_SUCCESS(rv, rv);
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rv = aPrototypeDocument->Write(oos);
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NS_ENSURE_SUCCESS(rv, rv);
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FinishOutputStream(protoURI);
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return NS_FAILED(rv) ? rv : rv2;
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}
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nsresult
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nsXULPrototypeCache::GetInputStream(nsIURI* uri, nsIObjectInputStream** stream)
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{
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nsAutoCString spec(kXULCachePrefix);
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nsresult rv = PathifyURI(uri, spec);
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if (NS_FAILED(rv))
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return NS_ERROR_NOT_AVAILABLE;
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UniquePtr<char[]> buf;
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uint32_t len;
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nsCOMPtr<nsIObjectInputStream> ois;
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StartupCache* sc = StartupCache::GetSingleton();
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if (!sc)
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return NS_ERROR_NOT_AVAILABLE;
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rv = sc->GetBuffer(spec.get(), &buf, &len);
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if (NS_FAILED(rv))
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return NS_ERROR_NOT_AVAILABLE;
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rv = NewObjectInputStreamFromBuffer(Move(buf), len, getter_AddRefs(ois));
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NS_ENSURE_SUCCESS(rv, rv);
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mInputStreamTable.Put(uri, ois);
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ois.forget(stream);
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return NS_OK;
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}
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nsresult
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nsXULPrototypeCache::FinishInputStream(nsIURI* uri) {
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mInputStreamTable.Remove(uri);
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return NS_OK;
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}
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nsresult
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nsXULPrototypeCache::GetOutputStream(nsIURI* uri, nsIObjectOutputStream** stream)
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{
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nsresult rv;
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nsCOMPtr<nsIObjectOutputStream> objectOutput;
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nsCOMPtr<nsIStorageStream> storageStream;
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bool found = mOutputStreamTable.Get(uri, getter_AddRefs(storageStream));
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if (found) {
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objectOutput = do_CreateInstance("mozilla.org/binaryoutputstream;1");
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if (!objectOutput) return NS_ERROR_OUT_OF_MEMORY;
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nsCOMPtr<nsIOutputStream> outputStream
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= do_QueryInterface(storageStream);
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objectOutput->SetOutputStream(outputStream);
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} else {
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rv = NewObjectOutputWrappedStorageStream(getter_AddRefs(objectOutput),
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getter_AddRefs(storageStream),
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false);
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NS_ENSURE_SUCCESS(rv, rv);
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mOutputStreamTable.Put(uri, storageStream);
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}
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objectOutput.forget(stream);
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return NS_OK;
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}
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nsresult
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nsXULPrototypeCache::FinishOutputStream(nsIURI* uri)
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{
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nsresult rv;
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StartupCache* sc = StartupCache::GetSingleton();
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if (!sc)
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return NS_ERROR_NOT_AVAILABLE;
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nsCOMPtr<nsIStorageStream> storageStream;
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bool found = mOutputStreamTable.Get(uri, getter_AddRefs(storageStream));
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if (!found)
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return NS_ERROR_UNEXPECTED;
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nsCOMPtr<nsIOutputStream> outputStream
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= do_QueryInterface(storageStream);
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outputStream->Close();
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UniquePtr<char[]> buf;
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uint32_t len;
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rv = NewBufferFromStorageStream(storageStream, &buf, &len);
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NS_ENSURE_SUCCESS(rv, rv);
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if (!mStartupCacheURITable.GetEntry(uri)) {
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nsAutoCString spec(kXULCachePrefix);
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rv = PathifyURI(uri, spec);
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if (NS_FAILED(rv))
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return NS_ERROR_NOT_AVAILABLE;
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rv = sc->PutBuffer(spec.get(), buf.get(), len);
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if (NS_SUCCEEDED(rv)) {
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mOutputStreamTable.Remove(uri);
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mStartupCacheURITable.PutEntry(uri);
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}
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}
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return rv;
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}
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// We have data if we're in the middle of writing it or we already
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// have it in the cache.
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nsresult
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nsXULPrototypeCache::HasData(nsIURI* uri, bool* exists)
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{
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if (mOutputStreamTable.Get(uri, nullptr)) {
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*exists = true;
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return NS_OK;
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}
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nsAutoCString spec(kXULCachePrefix);
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nsresult rv = PathifyURI(uri, spec);
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if (NS_FAILED(rv)) {
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*exists = false;
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return NS_OK;
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}
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UniquePtr<char[]> buf;
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uint32_t len;
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StartupCache* sc = StartupCache::GetSingleton();
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if (sc) {
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rv = sc->GetBuffer(spec.get(), &buf, &len);
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} else {
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*exists = false;
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return NS_OK;
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}
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*exists = NS_SUCCEEDED(rv);
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return NS_OK;
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}
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nsresult
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nsXULPrototypeCache::BeginCaching(nsIURI* aURI)
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{
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nsresult rv, tmp;
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nsAutoCString path;
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aURI->GetPath(path);
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if (!StringEndsWith(path, NS_LITERAL_CSTRING(".xul")))
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return NS_ERROR_NOT_AVAILABLE;
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StartupCache* startupCache = StartupCache::GetSingleton();
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if (!startupCache)
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return NS_ERROR_FAILURE;
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if (gDisableXULCache)
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return NS_ERROR_NOT_AVAILABLE;
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// Get the chrome directory to validate against the one stored in the
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// cache file, or to store there if we're generating a new file.
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nsCOMPtr<nsIFile> chromeDir;
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rv = NS_GetSpecialDirectory(NS_APP_CHROME_DIR, getter_AddRefs(chromeDir));
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if (NS_FAILED(rv))
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return rv;
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nsAutoCString chromePath;
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rv = chromeDir->GetNativePath(chromePath);
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if (NS_FAILED(rv))
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return rv;
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// XXXbe we assume the first package's locale is the same as the locale of
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// all subsequent packages of cached chrome URIs....
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nsAutoCString package;
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rv = aURI->GetHost(package);
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if (NS_FAILED(rv))
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return rv;
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nsCOMPtr<nsIXULChromeRegistry> chromeReg
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= do_GetService(NS_CHROMEREGISTRY_CONTRACTID, &rv);
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nsAutoCString locale;
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rv = chromeReg->GetSelectedLocale(package, false, locale);
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if (NS_FAILED(rv))
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return rv;
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nsAutoCString fileChromePath, fileLocale;
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UniquePtr<char[]> buf;
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uint32_t len, amtRead;
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nsCOMPtr<nsIObjectInputStream> objectInput;
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rv = startupCache->GetBuffer(kXULCacheInfoKey, &buf, &len);
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if (NS_SUCCEEDED(rv))
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rv = NewObjectInputStreamFromBuffer(Move(buf), len,
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getter_AddRefs(objectInput));
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if (NS_SUCCEEDED(rv)) {
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rv = objectInput->ReadCString(fileLocale);
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tmp = objectInput->ReadCString(fileChromePath);
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if (NS_FAILED(tmp)) {
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rv = tmp;
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}
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if (NS_FAILED(rv) ||
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(!fileChromePath.Equals(chromePath) ||
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!fileLocale.Equals(locale))) {
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// Our cache won't be valid in this case, we'll need to rewrite.
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// XXX This blows away work that other consumers (like
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// mozJSComponentLoader) have done, need more fine-grained control.
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startupCache->InvalidateCache();
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mStartupCacheURITable.Clear();
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rv = NS_ERROR_UNEXPECTED;
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}
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} else if (rv != NS_ERROR_NOT_AVAILABLE)
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// NS_ERROR_NOT_AVAILABLE is normal, usually if there's no cachefile.
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return rv;
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if (NS_FAILED(rv)) {
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// Either the cache entry was invalid or it didn't exist, so write it now.
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nsCOMPtr<nsIObjectOutputStream> objectOutput;
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nsCOMPtr<nsIInputStream> inputStream;
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nsCOMPtr<nsIStorageStream> storageStream;
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rv = NewObjectOutputWrappedStorageStream(getter_AddRefs(objectOutput),
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getter_AddRefs(storageStream),
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false);
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if (NS_SUCCEEDED(rv)) {
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rv = objectOutput->WriteStringZ(locale.get());
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tmp = objectOutput->WriteStringZ(chromePath.get());
|
|
if (NS_FAILED(tmp)) {
|
|
rv = tmp;
|
|
}
|
|
tmp = objectOutput->Close();
|
|
if (NS_FAILED(tmp)) {
|
|
rv = tmp;
|
|
}
|
|
tmp = storageStream->NewInputStream(0, getter_AddRefs(inputStream));
|
|
if (NS_FAILED(tmp)) {
|
|
rv = tmp;
|
|
}
|
|
}
|
|
|
|
if (NS_SUCCEEDED(rv)) {
|
|
uint64_t len64;
|
|
rv = inputStream->Available(&len64);
|
|
if (NS_SUCCEEDED(rv)) {
|
|
if (len64 <= UINT32_MAX)
|
|
len = (uint32_t)len64;
|
|
else
|
|
rv = NS_ERROR_FILE_TOO_BIG;
|
|
}
|
|
}
|
|
|
|
if (NS_SUCCEEDED(rv)) {
|
|
buf = MakeUnique<char[]>(len);
|
|
rv = inputStream->Read(buf.get(), len, &amtRead);
|
|
if (NS_SUCCEEDED(rv) && len == amtRead)
|
|
rv = startupCache->PutBuffer(kXULCacheInfoKey, buf.get(), len);
|
|
else {
|
|
rv = NS_ERROR_UNEXPECTED;
|
|
}
|
|
}
|
|
|
|
// Failed again, just bail.
|
|
if (NS_FAILED(rv)) {
|
|
startupCache->InvalidateCache();
|
|
mStartupCacheURITable.Clear();
|
|
return NS_ERROR_FAILURE;
|
|
}
|
|
}
|
|
|
|
return NS_OK;
|
|
}
|
|
|
|
void
|
|
nsXULPrototypeCache::MarkInCCGeneration(uint32_t aGeneration)
|
|
{
|
|
for (auto iter = mXBLDocTable.Iter(); !iter.Done(); iter.Next()) {
|
|
iter.Data()->MarkInCCGeneration(aGeneration);
|
|
}
|
|
for (auto iter = mPrototypeTable.Iter(); !iter.Done(); iter.Next()) {
|
|
iter.Data()->MarkInCCGeneration(aGeneration);
|
|
}
|
|
}
|
|
|
|
void
|
|
nsXULPrototypeCache::MarkInGC(JSTracer* aTrc)
|
|
{
|
|
for (auto iter = mScriptTable.Iter(); !iter.Done(); iter.Next()) {
|
|
JS::Heap<JSScript*>& script = iter.Data();
|
|
JS::TraceEdge(aTrc, &script, "nsXULPrototypeCache script");
|
|
}
|
|
}
|