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/*
* Copyright (C) 2014 Apple Inc. All rights reserved.
* Copyright (c) 2010 Google Inc. All rights reserved.
* Copyright (C) 2012 Research In Motion Limited. 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 "ScriptCallStackFactory.h"
#include "CallFrame.h"
#include "CodeBlock.h"
#include "Exception.h"
#include "JSCJSValue.h"
#include "JSCInlines.h"
#include "ScriptArguments.h"
#include "ScriptCallFrame.h"
#include "ScriptCallStack.h"
#include "ScriptValue.h"
#include "StackVisitor.h"
#include <wtf/RefCountedArray.h>
#include <wtf/text/WTFString.h>
using namespace JSC;
namespace Inspector {
class CreateScriptCallStackFunctor {
public:
CreateScriptCallStackFunctor(bool needToSkipAFrame, Vector<ScriptCallFrame>& frames, size_t remainingCapacity)
: m_needToSkipAFrame(needToSkipAFrame)
, m_frames(frames)
, m_remainingCapacityForFrameCapture(remainingCapacity)
{
}
StackVisitor::Status operator()(StackVisitor& visitor)
{
if (m_needToSkipAFrame) {
m_needToSkipAFrame = false;
return StackVisitor::Continue;
}
if (m_remainingCapacityForFrameCapture) {
#if ENABLE(WEBASSEMBLY)
if (visitor->codeBlock()->ownerExecutable()->isWebAssemblyExecutable())
return StackVisitor::Continue;
#endif
unsigned line;
unsigned column;
visitor->computeLineAndColumn(line, column);
m_frames.append(ScriptCallFrame(visitor->functionName(), visitor->sourceURL(), line, column));
m_remainingCapacityForFrameCapture--;
return StackVisitor::Continue;
}
return StackVisitor::Done;
}
private:
bool m_needToSkipAFrame;
Vector<ScriptCallFrame>& m_frames;
size_t m_remainingCapacityForFrameCapture;
};
Ref<ScriptCallStack> createScriptCallStack(JSC::ExecState* exec, size_t maxStackSize)
{
if (!exec)
return ScriptCallStack::create();
Vector<ScriptCallFrame> frames;
CallFrame* frame = exec->vm().topCallFrame;
CreateScriptCallStackFunctor functor(false, frames, maxStackSize);
frame->iterate(functor);
return ScriptCallStack::create(frames);
}
Ref<ScriptCallStack> createScriptCallStackForConsole(JSC::ExecState* exec, size_t maxStackSize)
{
if (!exec)
return ScriptCallStack::create();
Vector<ScriptCallFrame> frames;
CallFrame* frame = exec->vm().topCallFrame;
CreateScriptCallStackFunctor functor(true, frames, maxStackSize);
frame->iterate(functor);
if (frames.isEmpty()) {
CreateScriptCallStackFunctor functor(false, frames, maxStackSize);
frame->iterate(functor);
}
return ScriptCallStack::create(frames);
}
static void extractSourceInformationFromException(JSC::ExecState* exec, JSObject* exceptionObject, int* lineNumber, int* columnNumber, String* sourceURL)
{
// FIXME: <http://webkit.org/b/115087> Web Inspector: Should not need to evaluate JavaScript handling exceptions
JSValue lineValue = exceptionObject->getDirect(exec->vm(), Identifier::fromString(exec, "line"));
*lineNumber = lineValue && lineValue.isNumber() ? int(lineValue.toNumber(exec)) : 0;
JSValue columnValue = exceptionObject->getDirect(exec->vm(), Identifier::fromString(exec, "column"));
*columnNumber = columnValue && columnValue.isNumber() ? int(columnValue.toNumber(exec)) : 0;
JSValue sourceURLValue = exceptionObject->getDirect(exec->vm(), Identifier::fromString(exec, "sourceURL"));
*sourceURL = sourceURLValue && sourceURLValue.isString() ? sourceURLValue.toString(exec)->value(exec) : ASCIILiteral("undefined");
exec->clearException();
}
Ref<ScriptCallStack> createScriptCallStackFromException(JSC::ExecState* exec, JSC::Exception* exception, size_t maxStackSize)
{
Vector<ScriptCallFrame> frames;
RefCountedArray<StackFrame> stackTrace = exception->stack();
for (size_t i = 0; i < stackTrace.size() && i < maxStackSize; i++) {
unsigned line;
unsigned column;
stackTrace[i].computeLineAndColumn(line, column);
String functionName = stackTrace[i].friendlyFunctionName(exec);
frames.append(ScriptCallFrame(functionName, stackTrace[i].friendlySourceURL(), line, column));
}
// Fallback to getting at least the line and sourceURL from the exception object if it has values and the exceptionStack doesn't.
if (exception->value().isObject()) {
JSObject* exceptionObject = exception->value().toObject(exec);
int lineNumber;
int columnNumber;
String exceptionSourceURL;
if (!frames.size()) {
extractSourceInformationFromException(exec, exceptionObject, &lineNumber, &columnNumber, &exceptionSourceURL);
frames.append(ScriptCallFrame(String(), exceptionSourceURL, lineNumber, columnNumber));
} else {
if (stackTrace[0].sourceURL.isEmpty()) {
const ScriptCallFrame& firstCallFrame = frames.first();
extractSourceInformationFromException(exec, exceptionObject, &lineNumber, &columnNumber, &exceptionSourceURL);
frames[0] = ScriptCallFrame(firstCallFrame.functionName(), exceptionSourceURL, lineNumber, columnNumber);
}
}
}
return ScriptCallStack::create(frames);
}
Ref<ScriptArguments> createScriptArguments(JSC::ExecState* exec, unsigned skipArgumentCount)
{
Vector<Deprecated::ScriptValue> arguments;
size_t argumentCount = exec->argumentCount();
for (size_t i = skipArgumentCount; i < argumentCount; ++i)
arguments.append(Deprecated::ScriptValue(exec->vm(), exec->uncheckedArgument(i)));
return ScriptArguments::create(exec, arguments);
}
} // namespace Inspector
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