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/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim: set ts=8 sts=2 et sw=2 tw=80: */
/* 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/. */
#include "SharedScriptCache.h"
#include "ScriptLoadHandler.h" // ScriptLoadHandler
#include "ScriptLoader.h" // ScriptLoader
#include "mozilla/Maybe.h" // Maybe, Some, Nothing
#include "mozilla/Unused.h" // Unused
#include "mozilla/dom/ContentParent.h" // dom::ContentParent
#include "nsIMemoryReporter.h" // nsIMemoryReporter, MOZ_DEFINE_MALLOC_SIZE_OF, RegisterWeakMemoryReporter, UnregisterWeakMemoryReporter, MOZ_COLLECT_REPORT, KIND_HEAP, UNITS_BYTES
#include "nsIPrefBranch.h" // nsIPrefBranch, NS_PREFBRANCH_PREFCHANGE_TOPIC_ID
#include "nsIPrefService.h" // NS_PREFSERVICE_CONTRACTID
#include "nsIPrincipal.h" // nsIPrincipal
#include "nsISupportsImpl.h" // NS_IMPL_ISUPPORTS
#include "nsStringFwd.h" // nsACString
namespace mozilla::dom {
ScriptHashKey::ScriptHashKey(ScriptLoader* aLoader,
const JS::loader::ScriptLoadRequest* aRequest)
: PLDHashEntryHdr(),
mURI(aRequest->mURI),
mLoaderPrincipal(aLoader->LoaderPrincipal()),
mPartitionPrincipal(aLoader->PartitionedPrincipal()),
mCORSMode(aRequest->CORSMode()),
mSRIMetadata(aRequest->mIntegrity),
mKind(aRequest->mKind),
mNonce(aRequest->Nonce()),
mIsLinkRelPreload(aRequest->GetScriptLoadContext()->IsPreload()) {
if (mKind == JS::loader::ScriptKind::eClassic) {
if (aRequest->GetScriptLoadContext()->HasScriptElement()) {
aRequest->GetScriptLoadContext()->GetHintCharset(mHintCharset);
}
}
MOZ_COUNT_CTOR(ScriptHashKey);
}
ScriptHashKey::ScriptHashKey(const ScriptLoadData& aLoadData)
: ScriptHashKey(aLoadData.CacheKey()) {}
bool ScriptHashKey::KeyEquals(const ScriptHashKey& aKey) const {
if (mKind != aKey.mKind) {
return false;
}
{
bool eq;
if (NS_FAILED(mURI->Equals(aKey.mURI, &eq)) || !eq) {
return false;
}
}
if (!mPartitionPrincipal->Equals(aKey.mPartitionPrincipal)) {
return false;
}
if (mCORSMode != aKey.mCORSMode) {
return false;
}
if (mNonce != aKey.mNonce) {
return false;
}
// NOTE: module always use UTF-8.
if (mKind == JS::loader::ScriptKind::eClassic) {
if (mHintCharset != aKey.mHintCharset) {
return false;
}
}
if (!mSRIMetadata.CanTrustBeDelegatedTo(aKey.mSRIMetadata) ||
!aKey.mSRIMetadata.CanTrustBeDelegatedTo(mSRIMetadata)) {
return false;
}
return true;
}
NS_IMPL_ISUPPORTS(ScriptLoadData, nsISupports)
ScriptLoadData::ScriptLoadData(ScriptLoader* aLoader,
JS::loader::ScriptLoadRequest* aRequest)
: mExpirationTime(aRequest->ExpirationTime()),
mLoader(aLoader),
mKey(aLoader, aRequest),
mLoadedScript(aRequest->getLoadedScript()),
mNetworkMetadata(aRequest->mNetworkMetadata) {}
NS_IMPL_ISUPPORTS(SharedScriptCache, nsIMemoryReporter)
MOZ_DEFINE_MALLOC_SIZE_OF(SharedScriptCacheMallocSizeOf)
SharedScriptCache::SharedScriptCache() = default;
void SharedScriptCache::Init() {
RegisterWeakMemoryReporter(this);
// URL classification (tracking protection etc) are handled inside
// nsHttpChannel.
// The cache reflects the policy for whether to block or not, and once
// the policy is modified, we should discard the cache, to avoid running
// a cached script which is supposed to be blocked.
auto ClearCache = [](const char*, void*) { Clear(); };
Preferences::RegisterPrefixCallback(ClearCache, "urlclassifier.");
Preferences::RegisterCallback(ClearCache,
"privacy.trackingprotection.enabled");
}
SharedScriptCache::~SharedScriptCache() { UnregisterWeakMemoryReporter(this); }
void SharedScriptCache::LoadCompleted(SharedScriptCache* aCache,
ScriptLoadData& aData) {}
NS_IMETHODIMP
SharedScriptCache::CollectReports(nsIHandleReportCallback* aHandleReport,
nsISupports* aData, bool aAnonymize) {
MOZ_COLLECT_REPORT("explicit/js-non-window/cache", KIND_HEAP, UNITS_BYTES,
SharedScriptCacheMallocSizeOf(this) +
SizeOfExcludingThis(SharedScriptCacheMallocSizeOf),
"Memory used for SharedScriptCache to share script "
"across documents");
return NS_OK;
}
void SharedScriptCache::Clear(const Maybe<bool>& aChrome,
const Maybe<nsCOMPtr<nsIPrincipal>>& aPrincipal,
const Maybe<nsCString>& aSchemelessSite,
const Maybe<OriginAttributesPattern>& aPattern,
const Maybe<nsCString>& aURL) {
using ContentParent = dom::ContentParent;
if (XRE_IsParentProcess()) {
for (auto* cp : ContentParent::AllProcesses(ContentParent::eLive)) {
Unused << cp->SendClearScriptCache(aChrome, aPrincipal, aSchemelessSite,
aPattern, aURL);
}
}
if (sSingleton) {
sSingleton->ClearInProcess(aChrome, aPrincipal, aSchemelessSite, aPattern,
aURL);
}
}
/* static */
void SharedScriptCache::PrepareForLastCC() {
if (sSingleton) {
sSingleton->mComplete.Clear();
sSingleton->mPending.Clear();
sSingleton->mLoading.Clear();
}
}
} // namespace mozilla::dom
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