1 /*
2 * Copyright (C) 2009 Google Inc. All rights reserved.
3 *
4 * Redistribution and use in source and binary forms, with or without
5 * modification, are permitted provided that the following conditions are
6 * met:
7 *
8 * * Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * * Redistributions in binary form must reproduce the above
11 * copyright notice, this list of conditions and the following disclaimer
12 * in the documentation and/or other materials provided with the
13 * distribution.
14 * * Neither the name of Google Inc. nor the names of its
15 * contributors may be used to endorse or promote products derived from
16 * this software without specific prior written permission.
17 *
18 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
19 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
20 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
21 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
22 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
23 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
24 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
25 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
26 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
27 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
28 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
29 */
30
31 #include "config.h"
32 #include "public/web/WebKit.h"
33
34 #include "bindings/v8/V8Binding.h"
35 #include "bindings/v8/V8GCController.h"
36 #include "bindings/v8/V8Initializer.h"
37 #include "core/Init.h"
38 #include "core/animation/AnimationClock.h"
39 #include "core/dom/Microtask.h"
40 #include "core/frame/Settings.h"
41 #include "core/page/Page.h"
42 #include "core/workers/WorkerGlobalScopeProxy.h"
43 #include "gin/public/v8_platform.h"
44 #include "modules/InitModules.h"
45 #include "platform/LayoutTestSupport.h"
46 #include "platform/Logging.h"
47 #include "platform/RuntimeEnabledFeatures.h"
48 #include "platform/graphics/ImageDecodingStore.h"
49 #include "platform/graphics/media/MediaPlayer.h"
50 #include "platform/heap/Heap.h"
51 #include "platform/heap/glue/MessageLoopInterruptor.h"
52 #include "platform/heap/glue/PendingGCRunner.h"
53 #include "public/platform/Platform.h"
54 #include "public/platform/WebPrerenderingSupport.h"
55 #include "public/platform/WebThread.h"
56 #include "web/IndexedDBClientImpl.h"
57 #include "web/WebMediaPlayerClientImpl.h"
58 #include "wtf/Assertions.h"
59 #include "wtf/CryptographicallyRandomNumber.h"
60 #include "wtf/MainThread.h"
61 #include "wtf/WTF.h"
62 #include "wtf/text/AtomicString.h"
63 #include "wtf/text/TextEncoding.h"
64 #include <v8.h>
65
66 namespace blink {
67
68 namespace {
69
70 class EndOfTaskRunner : public WebThread::TaskObserver {
71 public:
willProcessTask()72 virtual void willProcessTask() OVERRIDE
73 {
74 WebCore::AnimationClock::notifyTaskStart();
75 }
didProcessTask()76 virtual void didProcessTask() OVERRIDE
77 {
78 WebCore::Microtask::performCheckpoint();
79 WebCore::V8GCController::reportDOMMemoryUsageToV8(mainThreadIsolate());
80 }
81 };
82
83 } // namespace
84
85 static WebThread::TaskObserver* s_endOfTaskRunner = 0;
86 static WebThread::TaskObserver* s_pendingGCRunner = 0;
87 static WebCore::ThreadState::Interruptor* s_messageLoopInterruptor = 0;
88 static WebCore::ThreadState::Interruptor* s_isolateInterruptor = 0;
89
90 // Make sure we are not re-initialized in the same address space.
91 // Doing so may cause hard to reproduce crashes.
92 static bool s_webKitInitialized = false;
93
generateEntropy(unsigned char * buffer,size_t length)94 static bool generateEntropy(unsigned char* buffer, size_t length)
95 {
96 if (Platform::current()) {
97 Platform::current()->cryptographicallyRandomValues(buffer, length);
98 return true;
99 }
100 return false;
101 }
102
initialize(Platform * platform)103 void initialize(Platform* platform)
104 {
105 initializeWithoutV8(platform);
106
107 v8::V8::InitializePlatform(gin::V8Platform::Get());
108 v8::Isolate* isolate = v8::Isolate::New();
109 isolate->Enter();
110 WebCore::V8Initializer::initializeMainThreadIfNeeded(isolate);
111 v8::V8::SetEntropySource(&generateEntropy);
112 v8::V8::SetArrayBufferAllocator(WebCore::v8ArrayBufferAllocator());
113 v8::V8::Initialize();
114 WebCore::V8PerIsolateData::ensureInitialized(isolate);
115
116 s_isolateInterruptor = new WebCore::V8IsolateInterruptor(v8::Isolate::GetCurrent());
117 WebCore::ThreadState::current()->addInterruptor(s_isolateInterruptor);
118
119 // currentThread will always be non-null in production, but can be null in Chromium unit tests.
120 if (WebThread* currentThread = platform->currentThread()) {
121 ASSERT(!s_endOfTaskRunner);
122 s_endOfTaskRunner = new EndOfTaskRunner;
123 currentThread->addTaskObserver(s_endOfTaskRunner);
124 }
125 }
126
mainThreadIsolate()127 v8::Isolate* mainThreadIsolate()
128 {
129 return WebCore::V8PerIsolateData::mainThreadIsolate();
130 }
131
currentTimeFunction()132 static double currentTimeFunction()
133 {
134 return Platform::current()->currentTime();
135 }
136
monotonicallyIncreasingTimeFunction()137 static double monotonicallyIncreasingTimeFunction()
138 {
139 return Platform::current()->monotonicallyIncreasingTime();
140 }
141
cryptographicallyRandomValues(unsigned char * buffer,size_t length)142 static void cryptographicallyRandomValues(unsigned char* buffer, size_t length)
143 {
144 Platform::current()->cryptographicallyRandomValues(buffer, length);
145 }
146
callOnMainThreadFunction(WTF::MainThreadFunction function,void * context)147 static void callOnMainThreadFunction(WTF::MainThreadFunction function, void* context)
148 {
149 Platform::current()->callOnMainThread(function, context);
150 }
151
initializeWithoutV8(Platform * platform)152 void initializeWithoutV8(Platform* platform)
153 {
154 ASSERT(!s_webKitInitialized);
155 s_webKitInitialized = true;
156
157 ASSERT(platform);
158 Platform::initialize(platform);
159
160 WTF::setRandomSource(cryptographicallyRandomValues);
161 WTF::initialize(currentTimeFunction, monotonicallyIncreasingTimeFunction);
162 WTF::initializeMainThread(callOnMainThreadFunction);
163 WebCore::Heap::init();
164
165 WebCore::ThreadState::attachMainThread();
166 // currentThread will always be non-null in production, but can be null in Chromium unit tests.
167 if (WebThread* currentThread = platform->currentThread()) {
168 ASSERT(!s_pendingGCRunner);
169 s_pendingGCRunner = new WebCore::PendingGCRunner;
170 currentThread->addTaskObserver(s_pendingGCRunner);
171
172 ASSERT(!s_messageLoopInterruptor);
173 s_messageLoopInterruptor = new WebCore::MessageLoopInterruptor(currentThread);
174 WebCore::ThreadState::current()->addInterruptor(s_messageLoopInterruptor);
175 }
176
177 DEFINE_STATIC_LOCAL(WebCore::ModulesInitializer, initializer, ());
178 initializer.init();
179
180 // There are some code paths (for example, running WebKit in the browser
181 // process and calling into LocalStorage before anything else) where the
182 // UTF8 string encoding tables are used on a background thread before
183 // they're set up. This is a problem because their set up routines assert
184 // they're running on the main WebKitThread. It might be possible to make
185 // the initialization thread-safe, but given that so many code paths use
186 // this, initializing this lazily probably doesn't buy us much.
187 WTF::UTF8Encoding();
188
189 WebCore::setIndexedDBClientCreateFunction(blink::IndexedDBClientImpl::create);
190
191 WebCore::MediaPlayer::setMediaEngineCreateFunction(blink::WebMediaPlayerClientImpl::create);
192 }
193
shutdown()194 void shutdown()
195 {
196 // currentThread will always be non-null in production, but can be null in Chromium unit tests.
197 if (Platform::current()->currentThread()) {
198 ASSERT(s_endOfTaskRunner);
199 Platform::current()->currentThread()->removeTaskObserver(s_endOfTaskRunner);
200 delete s_endOfTaskRunner;
201 s_endOfTaskRunner = 0;
202 }
203
204 ASSERT(s_isolateInterruptor);
205 WebCore::ThreadState::current()->removeInterruptor(s_isolateInterruptor);
206
207 // currentThread will always be non-null in production, but can be null in Chromium unit tests.
208 if (Platform::current()->currentThread()) {
209 ASSERT(s_pendingGCRunner);
210 delete s_pendingGCRunner;
211 s_pendingGCRunner = 0;
212
213 ASSERT(s_messageLoopInterruptor);
214 WebCore::ThreadState::current()->removeInterruptor(s_messageLoopInterruptor);
215 delete s_messageLoopInterruptor;
216 s_messageLoopInterruptor = 0;
217 }
218
219 // Detach the main thread before starting the shutdown sequence
220 // so that the main thread won't get involved in a GC during the shutdown.
221 WebCore::ThreadState::detachMainThread();
222
223 v8::Isolate* isolate = WebCore::V8PerIsolateData::mainThreadIsolate();
224 WebCore::V8PerIsolateData::dispose(isolate);
225 isolate->Exit();
226 isolate->Dispose();
227
228 shutdownWithoutV8();
229 }
230
shutdownWithoutV8()231 void shutdownWithoutV8()
232 {
233 ASSERT(!s_endOfTaskRunner);
234 WebCore::shutdown();
235 WebCore::Heap::shutdown();
236 WTF::shutdown();
237 Platform::shutdown();
238 WebPrerenderingSupport::shutdown();
239 }
240
setLayoutTestMode(bool value)241 void setLayoutTestMode(bool value)
242 {
243 WebCore::setIsRunningLayoutTest(value);
244 }
245
layoutTestMode()246 bool layoutTestMode()
247 {
248 return WebCore::isRunningLayoutTest();
249 }
250
setFontAntialiasingEnabledForTest(bool value)251 void setFontAntialiasingEnabledForTest(bool value)
252 {
253 WebCore::setFontAntialiasingEnabledForTest(value);
254 }
255
fontAntialiasingEnabledForTest()256 bool fontAntialiasingEnabledForTest()
257 {
258 return WebCore::isFontAntialiasingEnabledForTest();
259 }
260
enableLogChannel(const char * name)261 void enableLogChannel(const char* name)
262 {
263 #if !LOG_DISABLED
264 WTFLogChannel* channel = WebCore::getChannelFromName(name);
265 if (channel)
266 channel->state = WTFLogChannelOn;
267 #endif // !LOG_DISABLED
268 }
269
resetPluginCache(bool reloadPages)270 void resetPluginCache(bool reloadPages)
271 {
272 WebCore::Page::refreshPlugins(reloadPages);
273 }
274
275 } // namespace blink
276