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/*
* Copyright (C) 2009 Google Inc. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are
* met:
*
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above
* copyright notice, this list of conditions and the following disclaimer
* in the documentation and/or other materials provided with the
* distribution.
* * Neither the name of Google Inc. nor the names of its
* contributors may be used to endorse or promote products derived from
* this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include "config.h"
#include "WebKit.h"
#include "IDBFactoryBackendProxy.h"
#include "RuntimeEnabledFeatures.h"
#include "WebMediaPlayerClientImpl.h"
#include "bindings/v8/V8Binding.h"
#include "bindings/v8/V8Initializer.h"
#include "bindings/v8/V8RecursionScope.h"
#include "core/Init.h"
#include "core/dom/Microtask.h"
#include "core/page/Page.h"
#include "core/frame/Settings.h"
#include "core/workers/WorkerGlobalScopeProxy.h"
#include "platform/LayoutTestSupport.h"
#include "platform/Logging.h"
#include "platform/graphics/ImageDecodingStore.h"
#include "platform/graphics/media/MediaPlayer.h"
#include "public/platform/Platform.h"
#include "public/platform/WebPrerenderingSupport.h"
#include "public/platform/WebThread.h"
#include "wtf/Assertions.h"
#include "wtf/CryptographicallyRandomNumber.h"
#include "wtf/MainThread.h"
#include "wtf/WTF.h"
#include "wtf/text/AtomicString.h"
#include "wtf/text/TextEncoding.h"
#include <v8.h>
namespace blink {
namespace {
class EndOfTaskRunner : public WebThread::TaskObserver {
public:
virtual void willProcessTask() { }
virtual void didProcessTask()
{
WebCore::Microtask::performCheckpoint();
}
};
} // namespace
static WebThread::TaskObserver* s_endOfTaskRunner = 0;
// Make sure we are not re-initialized in the same address space.
// Doing so may cause hard to reproduce crashes.
static bool s_webKitInitialized = false;
static bool generateEntropy(unsigned char* buffer, size_t length)
{
if (Platform::current()) {
Platform::current()->cryptographicallyRandomValues(buffer, length);
return true;
}
return false;
}
#ifndef NDEBUG
static void assertV8RecursionScope()
{
ASSERT(!isMainThread() || WebCore::V8RecursionScope::properlyUsed());
}
#endif
void initialize(Platform* platform)
{
initializeWithoutV8(platform);
v8::Isolate* isolate = v8::Isolate::GetCurrent();
WebCore::V8Initializer::initializeMainThreadIfNeeded(isolate);
v8::V8::SetEntropySource(&generateEntropy);
v8::V8::SetArrayBufferAllocator(WebCore::v8ArrayBufferAllocator());
v8::V8::Initialize();
WebCore::setMainThreadIsolate(isolate);
WebCore::V8PerIsolateData::ensureInitialized(isolate);
// currentThread will always be non-null in production, but can be null in Chromium unit tests.
if (WebThread* currentThread = platform->currentThread()) {
#ifndef NDEBUG
v8::V8::AddCallCompletedCallback(&assertV8RecursionScope);
#endif
ASSERT(!s_endOfTaskRunner);
s_endOfTaskRunner = new EndOfTaskRunner;
currentThread->addTaskObserver(s_endOfTaskRunner);
}
}
v8::Isolate* mainThreadIsolate()
{
return WebCore::mainThreadIsolate();
}
static double currentTimeFunction()
{
return Platform::current()->currentTime();
}
static double monotonicallyIncreasingTimeFunction()
{
return Platform::current()->monotonicallyIncreasingTime();
}
static void cryptographicallyRandomValues(unsigned char* buffer, size_t length)
{
Platform::current()->cryptographicallyRandomValues(buffer, length);
}
static void callOnMainThreadFunction(WTF::MainThreadFunction function, void* context)
{
Platform::current()->callOnMainThread(function, context);
}
void initializeWithoutV8(Platform* platform)
{
ASSERT(!s_webKitInitialized);
s_webKitInitialized = true;
ASSERT(platform);
Platform::initialize(platform);
WTF::setRandomSource(cryptographicallyRandomValues);
WTF::initialize(currentTimeFunction, monotonicallyIncreasingTimeFunction);
WTF::initializeMainThread(callOnMainThreadFunction);
WebCore::init();
WebCore::ImageDecodingStore::initializeOnce();
// There are some code paths (for example, running WebKit in the browser
// process and calling into LocalStorage before anything else) where the
// UTF8 string encoding tables are used on a background thread before
// they're set up. This is a problem because their set up routines assert
// they're running on the main WebKitThread. It might be possible to make
// the initialization thread-safe, but given that so many code paths use
// this, initializing this lazily probably doesn't buy us much.
WTF::UTF8Encoding();
WebCore::setIDBFactoryBackendInterfaceCreateFunction(blink::IDBFactoryBackendProxy::create);
WebCore::MediaPlayer::setMediaEngineCreateFunction(blink::WebMediaPlayerClientImpl::create);
}
void shutdown()
{
// currentThread will always be non-null in production, but can be null in Chromium unit tests.
if (Platform::current()->currentThread()) {
ASSERT(s_endOfTaskRunner);
#ifndef NDEBUG
v8::V8::RemoveCallCompletedCallback(&assertV8RecursionScope);
#endif
Platform::current()->currentThread()->removeTaskObserver(s_endOfTaskRunner);
delete s_endOfTaskRunner;
s_endOfTaskRunner = 0;
}
WebCore::V8PerIsolateData::dispose(WebCore::mainThreadIsolate());
WebCore::setMainThreadIsolate(0);
v8::V8::Dispose();
shutdownWithoutV8();
}
void shutdownWithoutV8()
{
ASSERT(!s_endOfTaskRunner);
WebCore::ImageDecodingStore::shutdown();
WebCore::shutdown();
WTF::shutdown();
Platform::shutdown();
WebPrerenderingSupport::shutdown();
}
void setLayoutTestMode(bool value)
{
WebCore::setIsRunningLayoutTest(value);
}
bool layoutTestMode()
{
return WebCore::isRunningLayoutTest();
}
void enableLogChannel(const char* name)
{
#if !LOG_DISABLED
WTFLogChannel* channel = WebCore::getChannelFromName(name);
if (channel)
channel->state = WTFLogChannelOn;
#endif // !LOG_DISABLED
}
void resetPluginCache(bool reloadPages)
{
WebCore::Page::refreshPlugins(reloadPages);
}
} // namespace blink
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