forked from mirrors/gecko-dev
265e672179
# ignore-this-changeset --HG-- extra : amend_source : 4d301d3b0b8711c4692392aa76088ba7fd7d1022
736 lines
17 KiB
C++
736 lines
17 KiB
C++
/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* vim: set ts=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 file,
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* You can obtain one at http://mozilla.org/MPL/2.0/. */
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#include "LSSnapshot.h"
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#include "nsContentUtils.h"
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namespace mozilla {
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namespace dom {
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namespace {
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const uint32_t kSnapshotTimeoutMs = 20000;
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} // namespace
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LSSnapshot::LSSnapshot(LSDatabase* aDatabase)
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: mDatabase(aDatabase),
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mActor(nullptr),
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mInitLength(0),
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mLength(0),
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mExactUsage(0),
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mPeakUsage(0),
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mLoadState(LoadState::Initial),
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mExplicit(false),
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mHasPendingStableStateCallback(false),
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mHasPendingTimerCallback(false),
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mDirty(false)
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#ifdef DEBUG
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,
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mInitialized(false),
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mSentFinish(false)
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#endif
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{
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AssertIsOnOwningThread();
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}
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LSSnapshot::~LSSnapshot() {
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AssertIsOnOwningThread();
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MOZ_ASSERT(mDatabase);
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MOZ_ASSERT(!mHasPendingStableStateCallback);
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MOZ_ASSERT(!mHasPendingTimerCallback);
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MOZ_ASSERT_IF(mInitialized, mSentFinish);
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if (mActor) {
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mActor->SendDeleteMeInternal();
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MOZ_ASSERT(!mActor, "SendDeleteMeInternal should have cleared!");
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}
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}
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void LSSnapshot::SetActor(LSSnapshotChild* aActor) {
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AssertIsOnOwningThread();
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MOZ_ASSERT(aActor);
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MOZ_ASSERT(!mActor);
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mActor = aActor;
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}
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nsresult LSSnapshot::Init(const LSSnapshotInitInfo& aInitInfo, bool aExplicit) {
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AssertIsOnOwningThread();
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MOZ_ASSERT(!mSelfRef);
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MOZ_ASSERT(mActor);
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MOZ_ASSERT(mLoadState == LoadState::Initial);
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MOZ_ASSERT(!mInitialized);
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MOZ_ASSERT(!mSentFinish);
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mSelfRef = this;
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LoadState loadState = aInitInfo.loadState();
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const nsTArray<LSItemInfo>& itemInfos = aInitInfo.itemInfos();
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for (uint32_t i = 0; i < itemInfos.Length(); i++) {
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const LSItemInfo& itemInfo = itemInfos[i];
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const nsString& value = itemInfo.value();
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if (loadState != LoadState::AllOrderedItems && !value.IsVoid()) {
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mLoadedItems.PutEntry(itemInfo.key());
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}
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mValues.Put(itemInfo.key(), value);
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}
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if (loadState == LoadState::Partial) {
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mInitLength = aInitInfo.totalLength();
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mLength = mInitLength;
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} else if (loadState == LoadState::AllOrderedKeys) {
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mInitLength = aInitInfo.totalLength();
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} else {
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MOZ_ASSERT(loadState == LoadState::AllOrderedItems);
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}
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mExactUsage = aInitInfo.initialUsage();
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mPeakUsage = aInitInfo.peakUsage();
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mLoadState = aInitInfo.loadState();
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mExplicit = aExplicit;
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#ifdef DEBUG
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mInitialized = true;
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#endif
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if (!mExplicit) {
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mTimer = NS_NewTimer();
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MOZ_ASSERT(mTimer);
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ScheduleStableStateCallback();
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}
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return NS_OK;
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}
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nsresult LSSnapshot::GetLength(uint32_t* aResult) {
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AssertIsOnOwningThread();
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MOZ_ASSERT(mActor);
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MOZ_ASSERT(mInitialized);
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MOZ_ASSERT(!mSentFinish);
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MaybeScheduleStableStateCallback();
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if (mLoadState == LoadState::Partial) {
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*aResult = mLength;
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} else {
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*aResult = mValues.Count();
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}
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return NS_OK;
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}
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nsresult LSSnapshot::GetKey(uint32_t aIndex, nsAString& aResult) {
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AssertIsOnOwningThread();
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MOZ_ASSERT(mActor);
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MOZ_ASSERT(mInitialized);
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MOZ_ASSERT(!mSentFinish);
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MaybeScheduleStableStateCallback();
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nsresult rv = EnsureAllKeys();
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if (NS_WARN_IF(NS_FAILED(rv))) {
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return rv;
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}
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aResult.SetIsVoid(true);
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for (auto iter = mValues.ConstIter(); !iter.Done(); iter.Next()) {
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if (aIndex == 0) {
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aResult = iter.Key();
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return NS_OK;
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}
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aIndex--;
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}
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return NS_OK;
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}
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nsresult LSSnapshot::GetItem(const nsAString& aKey, nsAString& aResult) {
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AssertIsOnOwningThread();
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MOZ_ASSERT(mActor);
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MOZ_ASSERT(mInitialized);
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MOZ_ASSERT(!mSentFinish);
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MaybeScheduleStableStateCallback();
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nsString result;
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nsresult rv = GetItemInternal(aKey, Optional<nsString>(), result);
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if (NS_WARN_IF(NS_FAILED(rv))) {
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return rv;
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}
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aResult = result;
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return NS_OK;
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}
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nsresult LSSnapshot::GetKeys(nsTArray<nsString>& aKeys) {
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AssertIsOnOwningThread();
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MOZ_ASSERT(mActor);
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MOZ_ASSERT(mInitialized);
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MOZ_ASSERT(!mSentFinish);
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MaybeScheduleStableStateCallback();
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nsresult rv = EnsureAllKeys();
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if (NS_WARN_IF(NS_FAILED(rv))) {
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return rv;
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}
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for (auto iter = mValues.ConstIter(); !iter.Done(); iter.Next()) {
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aKeys.AppendElement(iter.Key());
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}
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return NS_OK;
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}
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nsresult LSSnapshot::SetItem(const nsAString& aKey, const nsAString& aValue,
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LSNotifyInfo& aNotifyInfo) {
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AssertIsOnOwningThread();
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MOZ_ASSERT(mActor);
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MOZ_ASSERT(mInitialized);
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MOZ_ASSERT(!mSentFinish);
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MaybeScheduleStableStateCallback();
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nsString oldValue;
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nsresult rv =
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GetItemInternal(aKey, Optional<nsString>(nsString(aValue)), oldValue);
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if (NS_WARN_IF(NS_FAILED(rv))) {
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return rv;
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}
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bool changed;
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if (oldValue == aValue && oldValue.IsVoid() == aValue.IsVoid()) {
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changed = false;
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} else {
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changed = true;
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int64_t delta = static_cast<int64_t>(aValue.Length()) -
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static_cast<int64_t>(oldValue.Length());
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if (oldValue.IsVoid()) {
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delta += static_cast<int64_t>(aKey.Length());
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}
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rv = UpdateUsage(delta);
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if (NS_WARN_IF(NS_FAILED(rv))) {
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if (oldValue.IsVoid()) {
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mValues.Remove(aKey);
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} else {
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mValues.Put(aKey, oldValue);
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}
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return rv;
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}
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if (oldValue.IsVoid() && mLoadState == LoadState::Partial) {
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mLength++;
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}
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LSSetItemInfo setItemInfo;
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setItemInfo.key() = aKey;
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setItemInfo.oldValue() = oldValue;
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setItemInfo.value() = aValue;
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mWriteInfos.AppendElement(std::move(setItemInfo));
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}
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aNotifyInfo.changed() = changed;
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aNotifyInfo.oldValue() = oldValue;
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return NS_OK;
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}
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nsresult LSSnapshot::RemoveItem(const nsAString& aKey,
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LSNotifyInfo& aNotifyInfo) {
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AssertIsOnOwningThread();
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MOZ_ASSERT(mActor);
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MOZ_ASSERT(mInitialized);
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MOZ_ASSERT(!mSentFinish);
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MaybeScheduleStableStateCallback();
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nsString oldValue;
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nsresult rv =
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GetItemInternal(aKey, Optional<nsString>(VoidString()), oldValue);
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if (NS_WARN_IF(NS_FAILED(rv))) {
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return rv;
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}
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bool changed;
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if (oldValue.IsVoid()) {
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changed = false;
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} else {
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changed = true;
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int64_t delta = -(static_cast<int64_t>(aKey.Length()) +
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static_cast<int64_t>(oldValue.Length()));
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DebugOnly<nsresult> rv = UpdateUsage(delta);
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MOZ_ASSERT(NS_SUCCEEDED(rv));
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if (mLoadState == LoadState::Partial) {
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mLength--;
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}
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LSRemoveItemInfo removeItemInfo;
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removeItemInfo.key() = aKey;
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removeItemInfo.oldValue() = oldValue;
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mWriteInfos.AppendElement(std::move(removeItemInfo));
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}
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aNotifyInfo.changed() = changed;
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aNotifyInfo.oldValue() = oldValue;
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return NS_OK;
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}
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nsresult LSSnapshot::Clear(LSNotifyInfo& aNotifyInfo) {
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AssertIsOnOwningThread();
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MOZ_ASSERT(mActor);
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MOZ_ASSERT(mInitialized);
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MOZ_ASSERT(!mSentFinish);
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MaybeScheduleStableStateCallback();
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uint32_t length;
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if (mLoadState == LoadState::Partial) {
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length = mLength;
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MOZ_ASSERT(length);
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MOZ_ALWAYS_TRUE(mActor->SendLoaded());
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mLoadedItems.Clear();
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mUnknownItems.Clear();
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mLength = 0;
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mLoadState = LoadState::AllOrderedItems;
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} else {
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length = mValues.Count();
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}
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bool changed;
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if (!length) {
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changed = false;
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} else {
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changed = true;
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DebugOnly<nsresult> rv = UpdateUsage(-mExactUsage);
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MOZ_ASSERT(NS_SUCCEEDED(rv));
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mValues.Clear();
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LSClearInfo clearInfo;
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mWriteInfos.AppendElement(std::move(clearInfo));
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}
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aNotifyInfo.changed() = changed;
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return NS_OK;
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}
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void LSSnapshot::MarkDirty() {
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AssertIsOnOwningThread();
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MOZ_ASSERT(mActor);
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MOZ_ASSERT(mInitialized);
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MOZ_ASSERT(!mSentFinish);
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if (mDirty) {
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return;
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}
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mDirty = true;
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if (!mExplicit && !mHasPendingStableStateCallback) {
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CancelTimer();
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MOZ_ALWAYS_SUCCEEDS(Checkpoint());
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MOZ_ALWAYS_SUCCEEDS(Finish());
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} else {
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MOZ_ASSERT(!mHasPendingTimerCallback);
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}
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}
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nsresult LSSnapshot::End() {
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AssertIsOnOwningThread();
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MOZ_ASSERT(mActor);
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MOZ_ASSERT(mExplicit);
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MOZ_ASSERT(!mHasPendingStableStateCallback);
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MOZ_ASSERT(!mHasPendingTimerCallback);
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MOZ_ASSERT(mInitialized);
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MOZ_ASSERT(!mSentFinish);
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nsresult rv = Checkpoint();
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if (NS_WARN_IF(NS_FAILED(rv))) {
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return rv;
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}
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RefPtr<LSSnapshot> kungFuDeathGrip = this;
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rv = Finish();
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if (NS_WARN_IF(NS_FAILED(rv))) {
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return rv;
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}
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if (NS_WARN_IF(!mActor->SendPing())) {
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return NS_ERROR_FAILURE;
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}
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return NS_OK;
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}
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void LSSnapshot::ScheduleStableStateCallback() {
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AssertIsOnOwningThread();
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MOZ_ASSERT(mTimer);
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MOZ_ASSERT(!mExplicit);
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MOZ_ASSERT(!mHasPendingStableStateCallback);
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CancelTimer();
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nsCOMPtr<nsIRunnable> runnable = this;
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nsContentUtils::RunInStableState(runnable.forget());
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mHasPendingStableStateCallback = true;
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}
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void LSSnapshot::MaybeScheduleStableStateCallback() {
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AssertIsOnOwningThread();
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if (!mExplicit && !mHasPendingStableStateCallback) {
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ScheduleStableStateCallback();
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} else {
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MOZ_ASSERT(!mHasPendingTimerCallback);
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}
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}
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nsresult LSSnapshot::GetItemInternal(const nsAString& aKey,
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const Optional<nsString>& aValue,
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nsAString& aResult) {
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AssertIsOnOwningThread();
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MOZ_ASSERT(mActor);
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MOZ_ASSERT(mInitialized);
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MOZ_ASSERT(!mSentFinish);
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nsString result;
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switch (mLoadState) {
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case LoadState::Partial: {
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if (mValues.Get(aKey, &result)) {
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MOZ_ASSERT(!result.IsVoid());
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} else if (mLoadedItems.GetEntry(aKey) || mUnknownItems.GetEntry(aKey)) {
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result.SetIsVoid(true);
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} else {
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if (NS_WARN_IF(!mActor->SendLoadItem(nsString(aKey), &result))) {
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return NS_ERROR_FAILURE;
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}
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if (result.IsVoid()) {
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mUnknownItems.PutEntry(aKey);
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} else {
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mLoadedItems.PutEntry(aKey);
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mValues.Put(aKey, result);
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if (mLoadedItems.Count() == mInitLength) {
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mLoadedItems.Clear();
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mUnknownItems.Clear();
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mLength = 0;
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mLoadState = LoadState::AllUnorderedItems;
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}
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}
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}
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if (aValue.WasPassed()) {
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const nsString& value = aValue.Value();
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if (!value.IsVoid()) {
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mValues.Put(aKey, value);
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} else if (!result.IsVoid()) {
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mValues.Remove(aKey);
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}
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}
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break;
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}
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case LoadState::AllOrderedKeys: {
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if (mValues.Get(aKey, &result)) {
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if (result.IsVoid()) {
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if (NS_WARN_IF(!mActor->SendLoadItem(nsString(aKey), &result))) {
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return NS_ERROR_FAILURE;
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}
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MOZ_ASSERT(!result.IsVoid());
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mLoadedItems.PutEntry(aKey);
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mValues.Put(aKey, result);
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if (mLoadedItems.Count() == mInitLength) {
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mLoadedItems.Clear();
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MOZ_ASSERT(mLength == 0);
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mLoadState = LoadState::AllOrderedItems;
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}
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}
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} else {
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result.SetIsVoid(true);
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}
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if (aValue.WasPassed()) {
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const nsString& value = aValue.Value();
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if (!value.IsVoid()) {
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mValues.Put(aKey, value);
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} else if (!result.IsVoid()) {
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mValues.Remove(aKey);
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}
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}
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break;
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}
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case LoadState::AllUnorderedItems:
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case LoadState::AllOrderedItems: {
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if (aValue.WasPassed()) {
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const nsString& value = aValue.Value();
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if (!value.IsVoid()) {
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auto entry = mValues.LookupForAdd(aKey);
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if (entry) {
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result = entry.Data();
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entry.Data() = value;
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} else {
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result.SetIsVoid(true);
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entry.OrInsert([value]() { return value; });
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}
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} else {
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if (auto entry = mValues.Lookup(aKey)) {
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result = entry.Data();
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MOZ_ASSERT(!result.IsVoid());
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entry.Remove();
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} else {
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result.SetIsVoid(true);
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}
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}
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} else {
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if (mValues.Get(aKey, &result)) {
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MOZ_ASSERT(!result.IsVoid());
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} else {
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result.SetIsVoid(true);
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}
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}
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break;
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}
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default:
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MOZ_CRASH("Bad state!");
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}
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aResult = result;
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return NS_OK;
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}
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nsresult LSSnapshot::EnsureAllKeys() {
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AssertIsOnOwningThread();
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MOZ_ASSERT(mActor);
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MOZ_ASSERT(mInitialized);
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MOZ_ASSERT(!mSentFinish);
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MOZ_ASSERT(mLoadState != LoadState::Initial);
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if (mLoadState == LoadState::AllOrderedKeys ||
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mLoadState == LoadState::AllOrderedItems) {
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return NS_OK;
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}
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nsTArray<nsString> keys;
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if (NS_WARN_IF(!mActor->SendLoadKeys(&keys))) {
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return NS_ERROR_FAILURE;
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}
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nsDataHashtable<nsStringHashKey, nsString> newValues;
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for (auto key : keys) {
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newValues.Put(key, VoidString());
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}
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for (uint32_t index = 0; index < mWriteInfos.Length(); index++) {
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const LSWriteInfo& writeInfo = mWriteInfos[index];
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switch (writeInfo.type()) {
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case LSWriteInfo::TLSSetItemInfo: {
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newValues.Put(writeInfo.get_LSSetItemInfo().key(), VoidString());
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break;
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}
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case LSWriteInfo::TLSRemoveItemInfo: {
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newValues.Remove(writeInfo.get_LSRemoveItemInfo().key());
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break;
|
|
}
|
|
case LSWriteInfo::TLSClearInfo: {
|
|
newValues.Clear();
|
|
break;
|
|
}
|
|
|
|
default:
|
|
MOZ_CRASH("Should never get here!");
|
|
}
|
|
}
|
|
|
|
MOZ_ASSERT_IF(mLoadState == LoadState::AllUnorderedItems,
|
|
newValues.Count() == mValues.Count());
|
|
|
|
for (auto iter = newValues.Iter(); !iter.Done(); iter.Next()) {
|
|
nsString value;
|
|
if (mValues.Get(iter.Key(), &value)) {
|
|
iter.Data() = value;
|
|
}
|
|
}
|
|
|
|
mValues.SwapElements(newValues);
|
|
|
|
if (mLoadState == LoadState::Partial) {
|
|
mUnknownItems.Clear();
|
|
mLength = 0;
|
|
mLoadState = LoadState::AllOrderedKeys;
|
|
} else {
|
|
MOZ_ASSERT(mLoadState == LoadState::AllUnorderedItems);
|
|
|
|
MOZ_ASSERT(mUnknownItems.Count() == 0);
|
|
MOZ_ASSERT(mLength == 0);
|
|
mLoadState = LoadState::AllOrderedItems;
|
|
}
|
|
|
|
return NS_OK;
|
|
}
|
|
|
|
nsresult LSSnapshot::UpdateUsage(int64_t aDelta) {
|
|
AssertIsOnOwningThread();
|
|
MOZ_ASSERT(mDatabase);
|
|
MOZ_ASSERT(mActor);
|
|
MOZ_ASSERT(mPeakUsage >= mExactUsage);
|
|
MOZ_ASSERT(mInitialized);
|
|
MOZ_ASSERT(!mSentFinish);
|
|
|
|
int64_t newExactUsage = mExactUsage + aDelta;
|
|
if (newExactUsage > mPeakUsage) {
|
|
int64_t minSize = newExactUsage - mPeakUsage;
|
|
int64_t requestedSize = minSize + 4096;
|
|
int64_t size;
|
|
if (NS_WARN_IF(
|
|
!mActor->SendIncreasePeakUsage(requestedSize, minSize, &size))) {
|
|
return NS_ERROR_FAILURE;
|
|
}
|
|
|
|
MOZ_ASSERT(size >= 0);
|
|
|
|
if (size == 0) {
|
|
return NS_ERROR_FILE_NO_DEVICE_SPACE;
|
|
}
|
|
|
|
mPeakUsage += size;
|
|
}
|
|
|
|
mExactUsage = newExactUsage;
|
|
return NS_OK;
|
|
}
|
|
|
|
nsresult LSSnapshot::Checkpoint() {
|
|
AssertIsOnOwningThread();
|
|
MOZ_ASSERT(mActor);
|
|
MOZ_ASSERT(mInitialized);
|
|
MOZ_ASSERT(!mSentFinish);
|
|
|
|
if (!mWriteInfos.IsEmpty()) {
|
|
MOZ_ALWAYS_TRUE(mActor->SendCheckpoint(mWriteInfos));
|
|
|
|
mWriteInfos.Clear();
|
|
}
|
|
|
|
return NS_OK;
|
|
}
|
|
|
|
nsresult LSSnapshot::Finish() {
|
|
AssertIsOnOwningThread();
|
|
MOZ_ASSERT(mDatabase);
|
|
MOZ_ASSERT(mActor);
|
|
MOZ_ASSERT(mInitialized);
|
|
MOZ_ASSERT(!mSentFinish);
|
|
|
|
MOZ_ALWAYS_TRUE(mActor->SendFinish());
|
|
|
|
mDatabase->NoteFinishedSnapshot(this);
|
|
|
|
#ifdef DEBUG
|
|
mSentFinish = true;
|
|
#endif
|
|
|
|
// Clear the self reference added in Init method.
|
|
MOZ_ASSERT(mSelfRef);
|
|
mSelfRef = nullptr;
|
|
|
|
return NS_OK;
|
|
}
|
|
|
|
void LSSnapshot::CancelTimer() {
|
|
AssertIsOnOwningThread();
|
|
MOZ_ASSERT(mTimer);
|
|
|
|
if (mHasPendingTimerCallback) {
|
|
MOZ_ALWAYS_SUCCEEDS(mTimer->Cancel());
|
|
mHasPendingTimerCallback = false;
|
|
}
|
|
}
|
|
|
|
// static
|
|
void LSSnapshot::TimerCallback(nsITimer* aTimer, void* aClosure) {
|
|
MOZ_ASSERT(aTimer);
|
|
|
|
auto* self = static_cast<LSSnapshot*>(aClosure);
|
|
MOZ_ASSERT(self);
|
|
MOZ_ASSERT(self->mTimer);
|
|
MOZ_ASSERT(SameCOMIdentity(self->mTimer, aTimer));
|
|
MOZ_ASSERT(!self->mHasPendingStableStateCallback);
|
|
MOZ_ASSERT(self->mHasPendingTimerCallback);
|
|
|
|
self->mHasPendingTimerCallback = false;
|
|
|
|
MOZ_ALWAYS_SUCCEEDS(self->Finish());
|
|
}
|
|
|
|
NS_IMPL_ISUPPORTS(LSSnapshot, nsIRunnable)
|
|
|
|
NS_IMETHODIMP
|
|
LSSnapshot::Run() {
|
|
AssertIsOnOwningThread();
|
|
MOZ_ASSERT(!mExplicit);
|
|
MOZ_ASSERT(mHasPendingStableStateCallback);
|
|
MOZ_ASSERT(!mHasPendingTimerCallback);
|
|
|
|
mHasPendingStableStateCallback = false;
|
|
|
|
MOZ_ALWAYS_SUCCEEDS(Checkpoint());
|
|
|
|
if (mDirty || !Preferences::GetBool("dom.storage.snapshot_reusing")) {
|
|
MOZ_ALWAYS_SUCCEEDS(Finish());
|
|
} else if (!mExplicit) {
|
|
MOZ_ASSERT(mTimer);
|
|
|
|
MOZ_ALWAYS_SUCCEEDS(mTimer->InitWithNamedFuncCallback(
|
|
TimerCallback, this, kSnapshotTimeoutMs, nsITimer::TYPE_ONE_SHOT,
|
|
"LSSnapshot::TimerCallback"));
|
|
|
|
mHasPendingTimerCallback = true;
|
|
}
|
|
|
|
return NS_OK;
|
|
}
|
|
|
|
} // namespace dom
|
|
} // namespace mozilla
|