ScriptCallStackFactory.cpp   [plain text]

/*
 * Copyright (c) 2010 Google Inc. All rights reserved.
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 * in the documentation and/or other materials provided with the
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 * contributors may be used to endorse or promote products derived from
 * this software without specific prior written permission.
 * 
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 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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#include "config.h"
#include "ScriptCallStackFactory.h"

#include "InspectorInstrumentation.h"
#include "JSDOMBinding.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 <runtime/UString.h>

using namespace JSC;

namespace WebCore {

class ScriptExecutionContext;

PassRefPtr<ScriptCallStack> createScriptCallStack(size_t, bool)
{
    return 0;
}

PassRefPtr<ScriptCallStack> createScriptCallStack(JSC::ExecState* exec, size_t maxStackSize)
{
    Vector<ScriptCallFrame> frames;
    CallFrame* callFrame = exec;
    while (true) {
        ASSERT(callFrame);
        int signedLineNumber;
        intptr_t sourceID;
        UString urlString;
        JSValue function;

        exec->interpreter()->retrieveLastCaller(callFrame, signedLineNumber, sourceID, urlString, function);
        UString 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(ustringToString(functionName), ustringToString(urlString), lineNumber));
        if (!function || frames.size() == maxStackSize)
            break;
        callFrame = callFrame->callerFrame();
    }
    return ScriptCallStack::create(frames);
}

PassRefPtr<ScriptCallStack> createScriptCallStackForInspector(JSC::ExecState* exec)
{
    size_t maxStackSize = 1;
    if (InspectorInstrumentation::hasFrontends()) {
        ScriptExecutionContext* scriptExecutionContext = jsCast<JSDOMGlobalObject*>(exec->lexicalGlobalObject())->scriptExecutionContext();
        if (InspectorInstrumentation::hasFrontendForScriptContext(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