gecko-dev/dom/storage/DOMStorageIPC.cpp

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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 "DOMStorageIPC.h"
#include "DOMStorageManager.h"
#include "mozilla/dom/ContentChild.h"
#include "mozilla/dom/ContentParent.h"
#include "mozilla/unused.h"
#include "nsIDiskSpaceWatcher.h"
#include "nsThreadUtils.h"
namespace mozilla {
namespace dom {
// ----------------------------------------------------------------------------
// Child
// ----------------------------------------------------------------------------
NS_IMPL_ADDREF(DOMStorageDBChild)
NS_IMETHODIMP_(MozExternalRefCountType) DOMStorageDBChild::Release(void)
{
NS_PRECONDITION(0 != mRefCnt, "dup release");
nsrefcnt count = --mRefCnt;
NS_LOG_RELEASE(this, count, "DOMStorageDBChild");
if (count == 1 && mIPCOpen) {
Send__delete__(this);
return 0;
}
if (count == 0) {
mRefCnt = 1;
delete this;
return 0;
}
return count;
}
void
DOMStorageDBChild::AddIPDLReference()
{
MOZ_ASSERT(!mIPCOpen, "Attempting to retain multiple IPDL references");
mIPCOpen = true;
AddRef();
}
void
DOMStorageDBChild::ReleaseIPDLReference()
{
MOZ_ASSERT(mIPCOpen, "Attempting to release non-existent IPDL reference");
mIPCOpen = false;
Release();
}
DOMStorageDBChild::DOMStorageDBChild(DOMLocalStorageManager* aManager)
: mManager(aManager)
, mStatus(NS_OK)
, mIPCOpen(false)
{
}
DOMStorageDBChild::~DOMStorageDBChild()
{
}
nsTHashtable<nsCStringHashKey>&
DOMStorageDBChild::ScopesHavingData()
{
if (!mScopesHavingData) {
mScopesHavingData = new nsTHashtable<nsCStringHashKey>;
}
return *mScopesHavingData;
}
nsresult
DOMStorageDBChild::Init()
{
ContentChild* child = ContentChild::GetSingleton();
AddIPDLReference();
child->SendPStorageConstructor(this);
return NS_OK;
}
nsresult
DOMStorageDBChild::Shutdown()
{
// There is nothing to do here, IPC will release automatically and
// the actual thread running on the parent process will also stop
// automatically in profile-before-change topic observer.
return NS_OK;
}
void
DOMStorageDBChild::AsyncPreload(DOMStorageCacheBridge* aCache, bool aPriority)
{
if (mIPCOpen) {
// Adding ref to cache for the time of preload. This ensures a reference to
// to the cache and that all keys will load into this cache object.
mLoadingCaches.PutEntry(aCache);
SendAsyncPreload(aCache->Scope(), aPriority);
} else {
// No IPC, no love. But the LoadDone call is expected.
aCache->LoadDone(NS_ERROR_UNEXPECTED);
}
}
void
DOMStorageDBChild::AsyncGetUsage(DOMStorageUsageBridge* aUsage)
{
if (mIPCOpen) {
SendAsyncGetUsage(aUsage->Scope());
}
}
void
DOMStorageDBChild::SyncPreload(DOMStorageCacheBridge* aCache, bool aForceSync)
{
if (NS_FAILED(mStatus)) {
aCache->LoadDone(mStatus);
return;
}
if (!mIPCOpen) {
aCache->LoadDone(NS_ERROR_UNEXPECTED);
return;
}
// There is no way to put the child process to a wait state to receive all
// incoming async responses from the parent, hence we have to do a sync preload
// instead. We are smart though, we only demand keys that are left to load in
// case the async preload has already loaded some keys.
InfallibleTArray<nsString> keys, values;
nsresult rv;
SendPreload(aCache->Scope(), aCache->LoadedCount(), &keys, &values, &rv);
for (uint32_t i = 0; i < keys.Length(); ++i) {
aCache->LoadItem(keys[i], values[i]);
}
aCache->LoadDone(rv);
}
nsresult
DOMStorageDBChild::AsyncAddItem(DOMStorageCacheBridge* aCache,
const nsAString& aKey,
const nsAString& aValue)
{
if (NS_FAILED(mStatus) || !mIPCOpen) {
return mStatus;
}
SendAsyncAddItem(aCache->Scope(), nsString(aKey), nsString(aValue));
ScopesHavingData().PutEntry(aCache->Scope());
return NS_OK;
}
nsresult
DOMStorageDBChild::AsyncUpdateItem(DOMStorageCacheBridge* aCache,
const nsAString& aKey,
const nsAString& aValue)
{
if (NS_FAILED(mStatus) || !mIPCOpen) {
return mStatus;
}
SendAsyncUpdateItem(aCache->Scope(), nsString(aKey), nsString(aValue));
ScopesHavingData().PutEntry(aCache->Scope());
return NS_OK;
}
nsresult
DOMStorageDBChild::AsyncRemoveItem(DOMStorageCacheBridge* aCache,
const nsAString& aKey)
{
if (NS_FAILED(mStatus) || !mIPCOpen) {
return mStatus;
}
SendAsyncRemoveItem(aCache->Scope(), nsString(aKey));
return NS_OK;
}
nsresult
DOMStorageDBChild::AsyncClear(DOMStorageCacheBridge* aCache)
{
if (NS_FAILED(mStatus) || !mIPCOpen) {
return mStatus;
}
SendAsyncClear(aCache->Scope());
ScopesHavingData().RemoveEntry(aCache->Scope());
return NS_OK;
}
bool
DOMStorageDBChild::ShouldPreloadScope(const nsACString& aScope)
{
// Return true if we didn't receive the aScope list yet.
// I tend to rather preserve a bit of early-after-start performance
// then a bit of memory here.
return !mScopesHavingData || mScopesHavingData->Contains(aScope);
}
bool
DOMStorageDBChild::RecvObserve(const nsCString& aTopic,
const nsCString& aScopePrefix)
{
DOMStorageObserver::Self()->Notify(aTopic.get(), aScopePrefix);
return true;
}
bool
DOMStorageDBChild::RecvScopesHavingData(nsTArray<nsCString>&& aScopes)
{
for (uint32_t i = 0; i < aScopes.Length(); ++i) {
ScopesHavingData().PutEntry(aScopes[i]);
}
return true;
}
bool
DOMStorageDBChild::RecvLoadItem(const nsCString& aScope,
const nsString& aKey,
const nsString& aValue)
{
DOMStorageCache* aCache = mManager->GetCache(aScope);
if (aCache) {
aCache->LoadItem(aKey, aValue);
}
return true;
}
bool
DOMStorageDBChild::RecvLoadDone(const nsCString& aScope, const nsresult& aRv)
{
DOMStorageCache* aCache = mManager->GetCache(aScope);
if (aCache) {
aCache->LoadDone(aRv);
// Just drop reference to this cache now since the load is done.
mLoadingCaches.RemoveEntry(static_cast<DOMStorageCacheBridge*>(aCache));
}
return true;
}
bool
DOMStorageDBChild::RecvLoadUsage(const nsCString& aScope, const int64_t& aUsage)
{
nsRefPtr<DOMStorageUsageBridge> scopeUsage = mManager->GetScopeUsage(aScope);
scopeUsage->LoadUsage(aUsage);
return true;
}
bool
DOMStorageDBChild::RecvError(const nsresult& aRv)
{
mStatus = aRv;
return true;
}
// ----------------------------------------------------------------------------
// Parent
// ----------------------------------------------------------------------------
NS_IMPL_ADDREF(DOMStorageDBParent)
NS_IMPL_RELEASE(DOMStorageDBParent)
void
DOMStorageDBParent::AddIPDLReference()
{
MOZ_ASSERT(!mIPCOpen, "Attempting to retain multiple IPDL references");
mIPCOpen = true;
AddRef();
}
void
DOMStorageDBParent::ReleaseIPDLReference()
{
MOZ_ASSERT(mIPCOpen, "Attempting to release non-existent IPDL reference");
mIPCOpen = false;
Release();
}
namespace {
class SendInitialChildDataRunnable : public nsRunnable
{
public:
explicit SendInitialChildDataRunnable(DOMStorageDBParent* aParent)
: mParent(aParent)
{}
private:
NS_IMETHOD Run()
{
if (!mParent->IPCOpen()) {
return NS_OK;
}
DOMStorageDBBridge* db = DOMStorageCache::GetDatabase();
if (db) {
InfallibleTArray<nsCString> scopes;
db->GetScopesHavingData(&scopes);
mozilla::unused << mParent->SendScopesHavingData(scopes);
}
// We need to check if the device is in a low disk space situation, so
// we can forbid in that case any write in localStorage.
nsCOMPtr<nsIDiskSpaceWatcher> diskSpaceWatcher =
do_GetService("@mozilla.org/toolkit/disk-space-watcher;1");
if (!diskSpaceWatcher) {
NS_WARNING("Could not get disk information from DiskSpaceWatcher");
return NS_OK;
}
bool lowDiskSpace = false;
diskSpaceWatcher->GetIsDiskFull(&lowDiskSpace);
if (lowDiskSpace) {
mozilla::unused << mParent->SendObserve(
nsDependentCString("low-disk-space"), EmptyCString());
}
return NS_OK;
}
nsRefPtr<DOMStorageDBParent> mParent;
};
} // namespace
DOMStorageDBParent::DOMStorageDBParent()
: mIPCOpen(false)
{
DOMStorageObserver* observer = DOMStorageObserver::Self();
if (observer) {
observer->AddSink(this);
}
// We are always open by IPC only
AddIPDLReference();
// Cannot send directly from here since the channel
// is not completely built at this moment.
nsRefPtr<SendInitialChildDataRunnable> r =
new SendInitialChildDataRunnable(this);
NS_DispatchToCurrentThread(r);
}
DOMStorageDBParent::~DOMStorageDBParent()
{
DOMStorageObserver* observer = DOMStorageObserver::Self();
if (observer) {
observer->RemoveSink(this);
}
}
mozilla::ipc::IProtocol*
DOMStorageDBParent::CloneProtocol(Channel* aChannel,
mozilla::ipc::ProtocolCloneContext* aCtx)
{
ContentParent* contentParent = aCtx->GetContentParent();
nsAutoPtr<PStorageParent> actor(contentParent->AllocPStorageParent());
if (!actor || !contentParent->RecvPStorageConstructor(actor)) {
return nullptr;
}
return actor.forget();
}
DOMStorageDBParent::CacheParentBridge*
DOMStorageDBParent::NewCache(const nsACString& aScope)
{
return new CacheParentBridge(this, aScope);
}
void
DOMStorageDBParent::ActorDestroy(ActorDestroyReason aWhy)
{
// Implement me! Bug 1005169
}
bool
DOMStorageDBParent::RecvAsyncPreload(const nsCString& aScope, const bool& aPriority)
{
DOMStorageDBBridge* db = DOMStorageCache::StartDatabase();
if (!db) {
return false;
}
db->AsyncPreload(NewCache(aScope), aPriority);
return true;
}
bool
DOMStorageDBParent::RecvAsyncGetUsage(const nsCString& aScope)
{
DOMStorageDBBridge* db = DOMStorageCache::StartDatabase();
if (!db) {
return false;
}
// The object releases it self in LoadUsage method
nsRefPtr<UsageParentBridge> usage = new UsageParentBridge(this, aScope);
db->AsyncGetUsage(usage);
return true;
}
namespace {
// We need another implementation of DOMStorageCacheBridge to do
// synchronous IPC preload. This class just receives Load* notifications
// and fills the returning arguments of RecvPreload with the database
// values for us.
class SyncLoadCacheHelper : public DOMStorageCacheBridge
{
public:
SyncLoadCacheHelper(const nsCString& aScope,
uint32_t aAlreadyLoadedCount,
InfallibleTArray<nsString>* aKeys,
InfallibleTArray<nsString>* aValues,
nsresult* rv)
: mMonitor("DOM Storage SyncLoad IPC")
, mScope(aScope)
, mKeys(aKeys)
, mValues(aValues)
, mRv(rv)
, mLoaded(false)
, mLoadedCount(aAlreadyLoadedCount)
{
// Precaution
*mRv = NS_ERROR_UNEXPECTED;
}
virtual const nsCString& Scope() const { return mScope; }
virtual bool Loaded() { return mLoaded; }
virtual uint32_t LoadedCount() { return mLoadedCount; }
virtual bool LoadItem(const nsAString& aKey, const nsString& aValue)
{
// Called on the aCache background thread
if (mLoaded) {
return false;
}
++mLoadedCount;
mKeys->AppendElement(aKey);
mValues->AppendElement(aValue);
return true;
}
virtual void LoadDone(nsresult aRv)
{
// Called on the aCache background thread
MonitorAutoLock monitor(mMonitor);
mLoaded = true;
*mRv = aRv;
monitor.Notify();
}
virtual void LoadWait()
{
// Called on the main thread, exits after LoadDone() call
MonitorAutoLock monitor(mMonitor);
while (!mLoaded) {
monitor.Wait();
}
}
private:
Monitor mMonitor;
nsCString mScope;
InfallibleTArray<nsString>* mKeys;
InfallibleTArray<nsString>* mValues;
nsresult* mRv;
bool mLoaded;
uint32_t mLoadedCount;
};
} // namespace
bool
DOMStorageDBParent::RecvPreload(const nsCString& aScope,
const uint32_t& aAlreadyLoadedCount,
InfallibleTArray<nsString>* aKeys,
InfallibleTArray<nsString>* aValues,
nsresult* aRv)
{
DOMStorageDBBridge* db = DOMStorageCache::StartDatabase();
if (!db) {
return false;
}
nsRefPtr<SyncLoadCacheHelper> cache(
new SyncLoadCacheHelper(aScope, aAlreadyLoadedCount, aKeys, aValues, aRv));
db->SyncPreload(cache, true);
return true;
}
bool
DOMStorageDBParent::RecvAsyncAddItem(const nsCString& aScope,
const nsString& aKey,
const nsString& aValue)
{
DOMStorageDBBridge* db = DOMStorageCache::StartDatabase();
if (!db) {
return false;
}
nsresult rv = db->AsyncAddItem(NewCache(aScope), aKey, aValue);
if (NS_FAILED(rv) && mIPCOpen) {
mozilla::unused << SendError(rv);
}
return true;
}
bool
DOMStorageDBParent::RecvAsyncUpdateItem(const nsCString& aScope,
const nsString& aKey,
const nsString& aValue)
{
DOMStorageDBBridge* db = DOMStorageCache::StartDatabase();
if (!db) {
return false;
}
nsresult rv = db->AsyncUpdateItem(NewCache(aScope), aKey, aValue);
if (NS_FAILED(rv) && mIPCOpen) {
mozilla::unused << SendError(rv);
}
return true;
}
bool
DOMStorageDBParent::RecvAsyncRemoveItem(const nsCString& aScope,
const nsString& aKey)
{
DOMStorageDBBridge* db = DOMStorageCache::StartDatabase();
if (!db) {
return false;
}
nsresult rv = db->AsyncRemoveItem(NewCache(aScope), aKey);
if (NS_FAILED(rv) && mIPCOpen) {
mozilla::unused << SendError(rv);
}
return true;
}
bool
DOMStorageDBParent::RecvAsyncClear(const nsCString& aScope)
{
DOMStorageDBBridge* db = DOMStorageCache::StartDatabase();
if (!db) {
return false;
}
nsresult rv = db->AsyncClear(NewCache(aScope));
if (NS_FAILED(rv) && mIPCOpen) {
mozilla::unused << SendError(rv);
}
return true;
}
bool
DOMStorageDBParent::RecvAsyncFlush()
{
DOMStorageDBBridge* db = DOMStorageCache::GetDatabase();
if (!db) {
return false;
}
db->AsyncFlush();
return true;
}
// DOMStorageObserverSink
nsresult
DOMStorageDBParent::Observe(const char* aTopic,
const nsACString& aScopePrefix)
{
if (mIPCOpen) {
#ifdef MOZ_NUWA_PROCESS
if (!(static_cast<ContentParent*>(Manager())->IsNuwaProcess() &&
ContentParent::IsNuwaReady())) {
#endif
mozilla::unused << SendObserve(nsDependentCString(aTopic),
nsCString(aScopePrefix));
#ifdef MOZ_NUWA_PROCESS
}
#endif
}
return NS_OK;
}
namespace {
// Results must be sent back on the main thread
class LoadRunnable : public nsRunnable
{
public:
enum TaskType {
loadItem,
loadDone
};
LoadRunnable(DOMStorageDBParent* aParent,
TaskType aType,
const nsACString& aScope,
const nsAString& aKey = EmptyString(),
const nsAString& aValue = EmptyString())
: mParent(aParent)
, mType(aType)
, mScope(aScope)
, mKey(aKey)
, mValue(aValue)
{ }
LoadRunnable(DOMStorageDBParent* aParent,
TaskType aType,
const nsACString& aScope,
nsresult aRv)
: mParent(aParent)
, mType(aType)
, mScope(aScope)
, mRv(aRv)
{ }
private:
nsRefPtr<DOMStorageDBParent> mParent;
TaskType mType;
nsCString mScope;
nsString mKey;
nsString mValue;
nsresult mRv;
NS_IMETHOD Run()
{
if (!mParent->IPCOpen()) {
return NS_OK;
}
switch (mType)
{
case loadItem:
mozilla::unused << mParent->SendLoadItem(mScope, mKey, mValue);
break;
case loadDone:
mozilla::unused << mParent->SendLoadDone(mScope, mRv);
break;
}
return NS_OK;
}
};
} // namespace
// DOMStorageDBParent::CacheParentBridge
bool
DOMStorageDBParent::CacheParentBridge::LoadItem(const nsAString& aKey, const nsString& aValue)
{
if (mLoaded) {
return false;
}
++mLoadedCount;
nsRefPtr<LoadRunnable> r =
new LoadRunnable(mParent, LoadRunnable::loadItem, mScope, aKey, aValue);
NS_DispatchToMainThread(r);
return true;
}
void
DOMStorageDBParent::CacheParentBridge::LoadDone(nsresult aRv)
{
// Prevent send of duplicate LoadDone.
if (mLoaded) {
return;
}
mLoaded = true;
nsRefPtr<LoadRunnable> r =
new LoadRunnable(mParent, LoadRunnable::loadDone, mScope, aRv);
NS_DispatchToMainThread(r);
}
void
DOMStorageDBParent::CacheParentBridge::LoadWait()
{
// Should never be called on this implementation
MOZ_ASSERT(false);
}
// DOMStorageDBParent::UsageParentBridge
namespace {
class UsageRunnable : public nsRunnable
{
public:
UsageRunnable(DOMStorageDBParent* aParent, const nsACString& aScope, const int64_t& aUsage)
: mParent(aParent)
, mScope(aScope)
, mUsage(aUsage)
{}
private:
NS_IMETHOD Run()
{
if (!mParent->IPCOpen()) {
return NS_OK;
}
mozilla::unused << mParent->SendLoadUsage(mScope, mUsage);
return NS_OK;
}
nsRefPtr<DOMStorageDBParent> mParent;
nsCString mScope;
int64_t mUsage;
};
} // namespace
void
DOMStorageDBParent::UsageParentBridge::LoadUsage(const int64_t aUsage)
{
nsRefPtr<UsageRunnable> r = new UsageRunnable(mParent, mScope, aUsage);
NS_DispatchToMainThread(r);
}
} // namespace dom
} // namespace mozilla