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/*
* Copyright (C) 2008 Apple 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. ``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
* 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.
*/
#ifndef JITCode_h
#define JITCode_h
#include <wtf/Platform.h>
#if ENABLE(JIT)
#include "CallFrame.h"
#include "JSValue.h"
#include "MacroAssemblerCodeRef.h"
#include "Profiler.h"
namespace JSC {
class JSGlobalData;
class RegisterFile;
class JITCode {
typedef MacroAssemblerCodeRef CodeRef;
typedef MacroAssemblerCodePtr CodePtr;
public:
JITCode()
{
}
JITCode(const CodeRef ref)
: m_ref(ref)
{
}
bool operator !() const
{
return !m_ref.m_code.executableAddress();
}
CodePtr addressForCall()
{
return m_ref.m_code;
}
// This function returns the offset in bytes of 'pointerIntoCode' into
// this block of code. The pointer provided must be a pointer into this
// block of code. It is ASSERTed that no codeblock >4gb in size.
unsigned offsetOf(void* pointerIntoCode)
{
intptr_t result = reinterpret_cast<intptr_t>(pointerIntoCode) - reinterpret_cast<intptr_t>(m_ref.m_code.executableAddress());
ASSERT(static_cast<intptr_t>(static_cast<unsigned>(result)) == result);
return static_cast<unsigned>(result);
}
// Execute the code!
inline JSValue execute(RegisterFile* registerFile, CallFrame* callFrame, JSGlobalData* globalData, JSValue* exception)
{
return JSValue::decode(ctiTrampoline(m_ref.m_code.executableAddress(), registerFile, callFrame, exception, Profiler::enabledProfilerReference(), globalData));
}
void* start()
{
return m_ref.m_code.dataLocation();
}
size_t size()
{
ASSERT(m_ref.m_code.executableAddress());
return m_ref.m_size;
}
ExecutablePool* getExecutablePool()
{
return m_ref.m_executablePool.get();
}
// Host functions are a bit special; they have a m_code pointer but they
// do not individully ref the executable pool containing the trampoline.
static JITCode HostFunction(CodePtr code)
{
return JITCode(code.dataLocation(), 0, 0);
}
private:
JITCode(void* code, PassRefPtr<ExecutablePool> executablePool, size_t size)
: m_ref(code, executablePool, size)
{
}
CodeRef m_ref;
};
};
#endif
#endif
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