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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:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. 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.
*
* THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS 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 APPLE INC. OR ITS 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 "V8Initializer.h"
#include "BindingState.h"
#include "DOMWindow.h"
#include "Document.h"
#include "Frame.h"
#include "MemoryUsageSupport.h"
#include "ScriptCallStack.h"
#include "ScriptCallStackFactory.h"
#include "ScriptProfiler.h"
#include "V8Binding.h"
#include "V8DOMWindow.h"
#include "V8GCController.h"
#include "V8History.h"
#include "V8Location.h"
#include "V8PerContextData.h"
#include <v8.h>
#include <wtf/RefPtr.h>
#include <wtf/text/WTFString.h>
namespace WebCore {
static Frame* findFrame(v8::Local<v8::Object> host, v8::Local<v8::Value> data)
{
WrapperTypeInfo* type = WrapperTypeInfo::unwrap(data);
if (V8DOMWindow::info.equals(type)) {
v8::Handle<v8::Object> windowWrapper = V8DOMWrapper::lookupDOMWrapper(V8DOMWindow::GetTemplate(), host);
if (windowWrapper.IsEmpty())
return 0;
return V8DOMWindow::toNative(windowWrapper)->frame();
}
if (V8History::info.equals(type))
return V8History::toNative(host)->frame();
if (V8Location::info.equals(type))
return V8Location::toNative(host)->frame();
// This function can handle only those types listed above.
ASSERT_NOT_REACHED();
return 0;
}
static void reportFatalErrorInMainThread(const char* location, const char* message)
{
int memoryUsageMB = MemoryUsageSupport::actualMemoryUsageMB();
printf("V8 error: %s (%s). Current memory usage: %d MB\n", message, location, memoryUsageMB);
CRASH();
}
static void messageHandlerInMainThread(v8::Handle<v8::Message> message, v8::Handle<v8::Value> data)
{
DOMWindow* firstWindow = firstDOMWindow(BindingState::instance());
if (!firstWindow->isCurrentlyDisplayedInFrame())
return;
String errorMessage = toWebCoreString(message->Get());
v8::Handle<v8::StackTrace> stackTrace = message->GetStackTrace();
RefPtr<ScriptCallStack> callStack;
// Currently stack trace is only collected when inspector is open.
if (!stackTrace.IsEmpty() && stackTrace->GetFrameCount() > 0)
callStack = createScriptCallStack(stackTrace, ScriptCallStack::maxCallStackSizeToCapture);
v8::Handle<v8::Value> resourceName = message->GetScriptResourceName();
bool shouldUseDocumentURL = resourceName.IsEmpty() || !resourceName->IsString();
String resource = shouldUseDocumentURL ? firstWindow->document()->url() : toWebCoreString(resourceName);
firstWindow->document()->reportException(errorMessage, message->GetLineNumber(), resource, callStack);
}
static void failedAccessCheckCallbackInMainThread(v8::Local<v8::Object> host, v8::AccessType type, v8::Local<v8::Value> data)
{
Frame* target = findFrame(host, data);
if (!target)
return;
DOMWindow* targetWindow = target->document()->domWindow();
targetWindow->printErrorMessage(targetWindow->crossDomainAccessErrorMessage(activeDOMWindow(BindingState::instance())));
}
void V8Initializer::initializeMainThreadIfNeeded()
{
ASSERT(isMainThread());
static bool initialized = false;
if (initialized)
return;
initialized = true;
v8::V8::IgnoreOutOfMemoryException();
v8::V8::SetFatalErrorHandler(reportFatalErrorInMainThread);
v8::V8::AddGCPrologueCallback(V8GCController::gcPrologue);
v8::V8::AddGCEpilogueCallback(V8GCController::gcEpilogue);
v8::V8::AddMessageListener(messageHandlerInMainThread);
v8::V8::SetFailedAccessCheckCallbackFunction(failedAccessCheckCallbackInMainThread);
#if ENABLE(JAVASCRIPT_DEBUGGER)
ScriptProfiler::initialize();
#endif
V8PerIsolateData::ensureInitialized(v8::Isolate::GetCurrent());
// FIXME: Remove the following 2 lines when V8 default has changed.
const char es5ReadonlyFlag[] = "--es5_readonly";
v8::V8::SetFlagsFromString(es5ReadonlyFlag, sizeof(es5ReadonlyFlag));
}
static void reportFatalErrorInWorker(const char* location, const char* message)
{
// FIXME: We temporarily deal with V8 internal error situations such as out-of-memory by crashing the worker.
CRASH();
}
static void messageHandlerInWorker(v8::Handle<v8::Message> message, v8::Handle<v8::Value> data)
{
static bool isReportingException = false;
// Exceptions that occur in error handler should be ignored since in that case
// WorkerContext::reportException will send the exception to the worker object.
if (isReportingException)
return;
isReportingException = true;
// During the frame teardown, there may not be a valid context.
if (ScriptExecutionContext* context = getScriptExecutionContext()) {
String errorMessage = toWebCoreString(message->Get());
int lineNumber = message->GetLineNumber();
String sourceURL = toWebCoreString(message->GetScriptResourceName());
context->reportException(errorMessage, lineNumber, sourceURL, 0);
}
isReportingException = false;
}
static const int kWorkerMaxStackSize = 500 * 1024;
void V8Initializer::initializeWorker()
{
v8::V8::AddMessageListener(messageHandlerInWorker);
v8::V8::IgnoreOutOfMemoryException();
v8::V8::SetFatalErrorHandler(reportFatalErrorInWorker);
v8::V8::AddGCPrologueCallback(V8GCController::gcPrologue);
v8::V8::AddGCEpilogueCallback(V8GCController::gcEpilogue);
// FIXME: Remove the following 2 lines when V8 default has changed.
const char es5ReadonlyFlag[] = "--es5_readonly";
v8::V8::SetFlagsFromString(es5ReadonlyFlag, sizeof(es5ReadonlyFlag));
v8::ResourceConstraints resourceConstraints;
uint32_t here;
resourceConstraints.set_stack_limit(&here - kWorkerMaxStackSize / sizeof(uint32_t*));
v8::SetResourceConstraints(&resourceConstraints);
V8PerIsolateData::ensureInitialized(v8::Isolate::GetCurrent());
}
} // namespace WebCore
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