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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 "ScriptValue.h"
#include <interpreter/CallFrame.h>
#include <interpreter/Interpreter.h>
#include <runtime/ArgList.h>
#include <runtime/JSFunction.h>
#include <runtime/JSGlobalData.h>
#include <runtime/JSValue.h>
#include <wtf/text/WTFString.h>
using namespace JSC;
namespace WebCore {
class ScriptExecutionContext;
PassRefPtr<ScriptCallStack> createScriptCallStack(size_t maxStackSize, bool emptyIsAllowed)
{
Vector<ScriptCallFrame> frames;
if (JSC::ExecState* exec = JSMainThreadExecState::currentState()) {
Vector<StackFrame> stackTrace;
Interpreter::getStackTrace(&exec->globalData(), stackTrace);
for (Vector<StackFrame>::const_iterator iter = stackTrace.begin(); iter < stackTrace.end(); iter++) {
frames.append(ScriptCallFrame(iter->friendlyFunctionName(exec), iter->friendlySourceURL(), iter->friendlyLineNumber()));
if (frames.size() >= maxStackSize)
break;
}
}
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));
}
return ScriptCallStack::create(frames);
}
PassRefPtr<ScriptCallStack> createScriptCallStack(JSC::ExecState* exec, size_t maxStackSize)
{
Vector<ScriptCallFrame> frames;
CallFrame* callFrame = exec;
while (true) {
ASSERT(callFrame);
int signedLineNumber;
intptr_t sourceID;
String urlString;
JSValue function;
exec->interpreter()->retrieveLastCaller(callFrame, signedLineNumber, sourceID, urlString, function);
String functionName;
if (function)
functionName = jsCast<JSFunction*>(function)->name(exec);
else {
// Caller is unknown, but if frames is empty we should still add the frame, because
// something called us, and gave us arguments.
if (!frames.isEmpty())
break;
}
unsigned lineNumber = signedLineNumber >= 0 ? signedLineNumber : 0;
frames.append(ScriptCallFrame(functionName, urlString, lineNumber));
if (!function || frames.size() == maxStackSize)
break;
callFrame = callFrame->callerFrame();
}
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<ScriptValue> arguments;
size_t argumentCount = exec->argumentCount();
for (size_t i = skipArgumentCount; i < argumentCount; ++i)
arguments.append(ScriptValue(exec->globalData(), exec->argument(i)));
return ScriptArguments::create(exec, arguments);
}
} // namespace WebCore
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