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/*
* 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 "InspectorInstrumentation.h"
#include "JSDOMBinding.h"
#include "JSMainThreadExecState.h"
#include "ScriptArguments.h"
#include "ScriptCallFrame.h"
#include "ScriptCallStack.h"
#include <bindings/ScriptValue.h>
#include <interpreter/CallFrame.h>
#include <interpreter/CallFrameInlines.h>
#include <interpreter/StackVisitor.h>
#include <runtime/ArgList.h>
#include <runtime/JSCJSValue.h>
#include <runtime/JSFunction.h>
#include <runtime/VM.h>
#include <wtf/text/WTFString.h>
using namespace JSC;
namespace WebCore {
class ScriptExecutionContext;
class CreateScriptCallStackFunctor {
public:
CreateScriptCallStackFunctor(Vector<ScriptCallFrame>& frames, size_t remainingCapacity)
: m_frames(frames)
, m_remainingCapacityForFrameCapture(remainingCapacity)
{
}
StackVisitor::Status operator()(StackVisitor& visitor)
{
if (m_remainingCapacityForFrameCapture) {
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:
Vector<ScriptCallFrame>& m_frames;
size_t m_remainingCapacityForFrameCapture;
};
PassRefPtr<ScriptCallStack> createScriptCallStack(size_t maxStackSize, bool emptyIsAllowed)
{
Vector<ScriptCallFrame> frames;
if (JSC::ExecState* exec = JSMainThreadExecState::currentState()) {
CallFrame* frame = exec->vm().topCallFrame;
CreateScriptCallStackFunctor functor(frames, maxStackSize);
frame->iterate(functor);
}
if (frames.isEmpty() && !emptyIsAllowed) {
// No frames found. It may happen in the case where
// a bound function is called from native code for example.
// Fallback to setting lineNumber to 0, and source and function name to "undefined".
frames.append(ScriptCallFrame("undefined", "undefined", 0, 0));
}
return ScriptCallStack::create(frames);
}
class CreateScriptCallStackForConsoleFunctor {
public:
CreateScriptCallStackForConsoleFunctor(bool needToSkipAFrame, size_t remainingCapacity, Vector<ScriptCallFrame>& frames)
: m_needToSkipAFrame(needToSkipAFrame)
, m_remainingCapacityForFrameCapture(remainingCapacity)
, m_frames(frames)
{
}
StackVisitor::Status operator()(StackVisitor& visitor)
{
if (m_needToSkipAFrame) {
m_needToSkipAFrame = false;
return StackVisitor::Continue;
}
if (m_remainingCapacityForFrameCapture) {
// This early exit is necessary to maintain our old behaviour
// but the stack trace we produce now is complete and handles all
// ways in which code may be running
if (!visitor->callee() && m_frames.size())
return StackVisitor::Done;
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;
size_t m_remainingCapacityForFrameCapture;
Vector<ScriptCallFrame>& m_frames;
};
PassRefPtr<ScriptCallStack> createScriptCallStack(JSC::ExecState* exec, size_t maxStackSize)
{
Vector<ScriptCallFrame> frames;
ASSERT(exec);
CallFrame* frame = exec->vm().topCallFrame;
CreateScriptCallStackForConsoleFunctor functor(true, maxStackSize, frames);
frame->iterate(functor);
if (frames.isEmpty()) {
CreateScriptCallStackForConsoleFunctor functor(false, maxStackSize, frames);
frame->iterate(functor);
}
return ScriptCallStack::create(frames);
}
PassRefPtr<ScriptCallStack> createScriptCallStackFromException(JSC::ExecState* exec, JSC::JSValue& exception, size_t maxStackSize)
{
Vector<ScriptCallFrame> frames;
RefCountedArray<StackFrame> stackTrace = exec->vm().exceptionStack();
for (size_t i = 0; i < stackTrace.size() && i < maxStackSize; i++) {
if (!stackTrace[i].callee && frames.size())
break;
String functionName = stackTrace[i].friendlyFunctionName(exec);
unsigned line;
unsigned column;
stackTrace[i].computeLineAndColumn(line, column);
frames.append(ScriptCallFrame(functionName, stackTrace[i].sourceURL, line, column));
}
// FIXME: <http://webkit.org/b/115087> Web Inspector: WebCore::reportException should not evaluate JavaScript handling exceptions
// Fallback to getting at least the line and sourceURL from the exception if it has values and the exceptionStack doesn't.
if (frames.size() > 0) {
const ScriptCallFrame& firstCallFrame = frames.first();
JSObject* exceptionObject = exception.toObject(exec);
if (exception.isObject() && firstCallFrame.sourceURL().isEmpty()) {
JSValue lineValue = exceptionObject->getDirect(exec->vm(), Identifier(exec, "line"));
int lineNumber = lineValue && lineValue.isNumber() ? int(lineValue.toNumber(exec)) : 0;
JSValue columnValue = exceptionObject->getDirect(exec->vm(), Identifier(exec, "column"));
int columnNumber = columnValue && columnValue.isNumber() ? int(columnValue.toNumber(exec)) : 0;
JSValue sourceURLValue = exceptionObject->getDirect(exec->vm(), Identifier(exec, "sourceURL"));
String exceptionSourceURL = sourceURLValue && sourceURLValue.isString() ? sourceURLValue.toString(exec)->value(exec) : ASCIILiteral("undefined");
frames[0] = ScriptCallFrame(firstCallFrame.functionName(), exceptionSourceURL, lineNumber, columnNumber);
}
}
return ScriptCallStack::create(frames);
}
PassRefPtr<ScriptCallStack> createScriptCallStackForConsole(JSC::ExecState* exec)
{
size_t maxStackSize = 1;
if (InspectorInstrumentation::hasFrontends()) {
ScriptExecutionContext* scriptExecutionContext = jsCast<JSDOMGlobalObject*>(exec->lexicalGlobalObject())->scriptExecutionContext();
if (InspectorInstrumentation::consoleAgentEnabled(scriptExecutionContext))
maxStackSize = ScriptCallStack::maxCallStackSizeToCapture;
}
return createScriptCallStack(exec, maxStackSize);
}
PassRefPtr<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 WebCore
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