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
6 * are met:
7 * 1. Redistributions of source code must retain the above copyright
8 * notice, this list of conditions and the following disclaimer.
9 * 2. Redistributions in binary form must reproduce the above copyright
10 * notice, this list of conditions and the following disclaimer in the
11 * documentation and/or other materials provided with the distribution.
12 *
13 * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
14 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
15 * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
16 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
17 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
18 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
19 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
20 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
21 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
22 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
23 * THE POSSIBILITY OF SUCH DAMAGE.
24 */
25
26 #include "config.h"
27 #include "bindings/v8/V8Initializer.h"
28
29 #include "bindings/core/v8/V8DOMException.h"
30 #include "bindings/core/v8/V8ErrorEvent.h"
31 #include "bindings/core/v8/V8History.h"
32 #include "bindings/core/v8/V8Location.h"
33 #include "bindings/core/v8/V8Window.h"
34 #include "bindings/v8/DOMWrapperWorld.h"
35 #include "bindings/v8/ScriptCallStackFactory.h"
36 #include "bindings/v8/ScriptController.h"
37 #include "bindings/v8/ScriptProfiler.h"
38 #include "bindings/v8/V8Binding.h"
39 #include "bindings/v8/V8ErrorHandler.h"
40 #include "bindings/v8/V8GCController.h"
41 #include "bindings/v8/V8PerContextData.h"
42 #include "core/dom/Document.h"
43 #include "core/dom/ExceptionCode.h"
44 #include "core/frame/ConsoleTypes.h"
45 #include "core/frame/LocalDOMWindow.h"
46 #include "core/frame/LocalFrame.h"
47 #include "core/frame/csp/ContentSecurityPolicy.h"
48 #include "core/inspector/ScriptCallStack.h"
49 #include "platform/TraceEvent.h"
50 #include "public/platform/Platform.h"
51 #include "wtf/RefPtr.h"
52 #include "wtf/text/WTFString.h"
53 #include <v8-debug.h>
54
55 namespace WebCore {
56
findFrame(v8::Local<v8::Object> host,v8::Local<v8::Value> data,v8::Isolate * isolate)57 static LocalFrame* findFrame(v8::Local<v8::Object> host, v8::Local<v8::Value> data, v8::Isolate* isolate)
58 {
59 const WrapperTypeInfo* type = WrapperTypeInfo::unwrap(data);
60
61 if (V8Window::wrapperTypeInfo.equals(type)) {
62 v8::Handle<v8::Object> windowWrapper = V8Window::findInstanceInPrototypeChain(host, isolate);
63 if (windowWrapper.IsEmpty())
64 return 0;
65 return V8Window::toNative(windowWrapper)->frame();
66 }
67
68 if (V8History::wrapperTypeInfo.equals(type))
69 return V8History::toNative(host)->frame();
70
71 if (V8Location::wrapperTypeInfo.equals(type))
72 return V8Location::toNative(host)->frame();
73
74 // This function can handle only those types listed above.
75 ASSERT_NOT_REACHED();
76 return 0;
77 }
78
reportFatalErrorInMainThread(const char * location,const char * message)79 static void reportFatalErrorInMainThread(const char* location, const char* message)
80 {
81 int memoryUsageMB = blink::Platform::current()->actualMemoryUsageMB();
82 printf("V8 error: %s (%s). Current memory usage: %d MB\n", message, location, memoryUsageMB);
83 CRASH();
84 }
85
messageHandlerInMainThread(v8::Handle<v8::Message> message,v8::Handle<v8::Value> data)86 static void messageHandlerInMainThread(v8::Handle<v8::Message> message, v8::Handle<v8::Value> data)
87 {
88 ASSERT(isMainThread());
89 // It's possible that messageHandlerInMainThread() is invoked while we're initializing a window.
90 // In that half-baked situation, we don't have a valid context nor a valid world,
91 // so just return immediately.
92 if (DOMWrapperWorld::windowIsBeingInitialized())
93 return;
94
95 v8::Isolate* isolate = v8::Isolate::GetCurrent();
96 // If called during context initialization, there will be no entered window.
97 LocalDOMWindow* enteredWindow = enteredDOMWindow(isolate);
98 if (!enteredWindow || !enteredWindow->isCurrentlyDisplayedInFrame())
99 return;
100
101 String errorMessage = toCoreString(message->Get());
102
103 v8::Handle<v8::StackTrace> stackTrace = message->GetStackTrace();
104 RefPtrWillBeRawPtr<ScriptCallStack> callStack = nullptr;
105 // Currently stack trace is only collected when inspector is open.
106 if (!stackTrace.IsEmpty() && stackTrace->GetFrameCount() > 0)
107 callStack = createScriptCallStack(stackTrace, ScriptCallStack::maxCallStackSizeToCapture, isolate);
108
109 v8::Handle<v8::Value> resourceName = message->GetScriptResourceName();
110 bool shouldUseDocumentURL = resourceName.IsEmpty() || !resourceName->IsString();
111 String resource = shouldUseDocumentURL ? enteredWindow->document()->url() : toCoreString(resourceName.As<v8::String>());
112 AccessControlStatus corsStatus = message->IsSharedCrossOrigin() ? SharableCrossOrigin : NotSharableCrossOrigin;
113
114 ScriptState* scriptState = ScriptState::current(isolate);
115 RefPtrWillBeRawPtr<ErrorEvent> event = ErrorEvent::create(errorMessage, resource, message->GetLineNumber(), message->GetStartColumn() + 1, &scriptState->world());
116 if (V8DOMWrapper::isDOMWrapper(data)) {
117 v8::Handle<v8::Object> obj = v8::Handle<v8::Object>::Cast(data);
118 const WrapperTypeInfo* type = toWrapperTypeInfo(obj);
119 if (V8DOMException::wrapperTypeInfo.isSubclass(type)) {
120 DOMException* exception = V8DOMException::toNative(obj);
121 if (exception && !exception->messageForConsole().isEmpty())
122 event->setUnsanitizedMessage("Uncaught " + exception->toStringForConsole());
123 }
124 }
125
126 // This method might be called while we're creating a new context. In this case, we
127 // avoid storing the exception object, as we can't create a wrapper during context creation.
128 // FIXME: Can we even get here during initialization now that we bail out when GetEntered returns an empty handle?
129 LocalFrame* frame = enteredWindow->document()->frame();
130 if (frame && frame->script().existingWindowShell(scriptState->world())) {
131 V8ErrorHandler::storeExceptionOnErrorEventWrapper(event.get(), data, scriptState->context()->Global(), isolate);
132 }
133 enteredWindow->document()->reportException(event.release(), callStack, corsStatus);
134 }
135
failedAccessCheckCallbackInMainThread(v8::Local<v8::Object> host,v8::AccessType type,v8::Local<v8::Value> data)136 static void failedAccessCheckCallbackInMainThread(v8::Local<v8::Object> host, v8::AccessType type, v8::Local<v8::Value> data)
137 {
138 v8::Isolate* isolate = v8::Isolate::GetCurrent();
139 LocalFrame* target = findFrame(host, data, isolate);
140 if (!target)
141 return;
142 LocalDOMWindow* targetWindow = target->domWindow();
143
144 // FIXME: We should modify V8 to pass in more contextual information (context, property, and object).
145 ExceptionState exceptionState(ExceptionState::UnknownContext, 0, 0, isolate->GetCurrentContext()->Global(), isolate);
146 exceptionState.throwSecurityError(targetWindow->sanitizedCrossDomainAccessErrorMessage(callingDOMWindow(isolate)), targetWindow->crossDomainAccessErrorMessage(callingDOMWindow(isolate)));
147 exceptionState.throwIfNeeded();
148 }
149
codeGenerationCheckCallbackInMainThread(v8::Local<v8::Context> context)150 static bool codeGenerationCheckCallbackInMainThread(v8::Local<v8::Context> context)
151 {
152 if (ExecutionContext* executionContext = toExecutionContext(context)) {
153 if (ContentSecurityPolicy* policy = toDocument(executionContext)->contentSecurityPolicy())
154 return policy->allowEval(ScriptState::from(context));
155 }
156 return false;
157 }
158
timerTraceProfilerInMainThread(const char * name,int status)159 static void timerTraceProfilerInMainThread(const char* name, int status)
160 {
161 if (!status) {
162 TRACE_EVENT_BEGIN0("V8", name);
163 } else {
164 TRACE_EVENT_END0("V8", name);
165 }
166 }
167
initializeV8Common(v8::Isolate * isolate)168 static void initializeV8Common(v8::Isolate* isolate)
169 {
170 v8::ResourceConstraints constraints;
171 constraints.ConfigureDefaults(static_cast<uint64_t>(blink::Platform::current()->physicalMemoryMB()) << 20, static_cast<uint32_t>(blink::Platform::current()->virtualMemoryLimitMB()) << 20, static_cast<uint32_t>(blink::Platform::current()->numberOfProcessors()));
172 v8::SetResourceConstraints(isolate, &constraints);
173
174 v8::V8::AddGCPrologueCallback(V8GCController::gcPrologue);
175 v8::V8::AddGCEpilogueCallback(V8GCController::gcEpilogue);
176
177 v8::Debug::SetLiveEditEnabled(isolate, false);
178
179 isolate->SetAutorunMicrotasks(false);
180 }
181
initializeMainThreadIfNeeded(v8::Isolate * isolate)182 void V8Initializer::initializeMainThreadIfNeeded(v8::Isolate* isolate)
183 {
184 ASSERT(isMainThread());
185
186 static bool initialized = false;
187 if (initialized)
188 return;
189 initialized = true;
190
191 initializeV8Common(isolate);
192
193 v8::V8::SetFatalErrorHandler(reportFatalErrorInMainThread);
194 V8PerIsolateData::ensureInitialized(isolate);
195 v8::V8::AddMessageListener(messageHandlerInMainThread);
196 v8::V8::SetFailedAccessCheckCallbackFunction(failedAccessCheckCallbackInMainThread);
197 v8::V8::SetAllowCodeGenerationFromStringsCallback(codeGenerationCheckCallbackInMainThread);
198
199 isolate->SetEventLogger(timerTraceProfilerInMainThread);
200
201 ScriptProfiler::initialize();
202 }
203
reportFatalErrorInWorker(const char * location,const char * message)204 static void reportFatalErrorInWorker(const char* location, const char* message)
205 {
206 // FIXME: We temporarily deal with V8 internal error situations such as out-of-memory by crashing the worker.
207 CRASH();
208 }
209
messageHandlerInWorker(v8::Handle<v8::Message> message,v8::Handle<v8::Value> data)210 static void messageHandlerInWorker(v8::Handle<v8::Message> message, v8::Handle<v8::Value> data)
211 {
212 static bool isReportingException = false;
213 // Exceptions that occur in error handler should be ignored since in that case
214 // WorkerGlobalScope::reportException will send the exception to the worker object.
215 if (isReportingException)
216 return;
217 isReportingException = true;
218
219 v8::Isolate* isolate = v8::Isolate::GetCurrent();
220 ScriptState* scriptState = ScriptState::current(isolate);
221 // During the frame teardown, there may not be a valid context.
222 if (ExecutionContext* context = scriptState->executionContext()) {
223 String errorMessage = toCoreString(message->Get());
224 TOSTRING_VOID(V8StringResource<>, sourceURL, message->GetScriptResourceName());
225
226 RefPtrWillBeRawPtr<ErrorEvent> event = ErrorEvent::create(errorMessage, sourceURL, message->GetLineNumber(), message->GetStartColumn() + 1, &DOMWrapperWorld::current(isolate));
227 AccessControlStatus corsStatus = message->IsSharedCrossOrigin() ? SharableCrossOrigin : NotSharableCrossOrigin;
228
229 V8ErrorHandler::storeExceptionOnErrorEventWrapper(event.get(), data, scriptState->context()->Global(), isolate);
230 context->reportException(event.release(), nullptr, corsStatus);
231 }
232
233 isReportingException = false;
234 }
235
236 static const int kWorkerMaxStackSize = 500 * 1024;
237
initializeWorker(v8::Isolate * isolate)238 void V8Initializer::initializeWorker(v8::Isolate* isolate)
239 {
240 initializeV8Common(isolate);
241
242 v8::V8::AddMessageListener(messageHandlerInWorker);
243 v8::V8::SetFatalErrorHandler(reportFatalErrorInWorker);
244
245 v8::ResourceConstraints resourceConstraints;
246 uint32_t here;
247 resourceConstraints.set_stack_limit(&here - kWorkerMaxStackSize / sizeof(uint32_t*));
248 v8::SetResourceConstraints(isolate, &resourceConstraints);
249 }
250
251 } // namespace WebCore
252