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/*
* Copyright (C) 2014-2018 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.
*/
#pragma once
#include "GPRInfo.h"
namespace JSC {
struct EntryFrame;
class CallFrame;
class JSGlobalObject;
class JSObject;
class VM;
struct VMEntryRecord {
/*
* This record stored in a vmEntryTo{JavaScript,Host} allocated frame. It is allocated on the stack
* after callee save registers where local variables would go.
*/
VM* m_vm;
CallFrame* m_prevTopCallFrame;
EntryFrame* m_prevTopEntryFrame;
JSObject* m_callee;
JSObject* callee() const { return m_callee; }
#if !ENABLE(C_LOOP) && NUMBER_OF_CALLEE_SAVES_REGISTERS > 0
CPURegister calleeSaveRegistersBuffer[NUMBER_OF_CALLEE_SAVES_REGISTERS];
#elif ENABLE(C_LOOP)
CPURegister calleeSaveRegistersBuffer[1];
#endif
CallFrame* prevTopCallFrame() { return m_prevTopCallFrame; }
SUPPRESS_ASAN CallFrame* unsafePrevTopCallFrame() { return m_prevTopCallFrame; }
EntryFrame* prevTopEntryFrame() { return m_prevTopEntryFrame; }
SUPPRESS_ASAN EntryFrame* unsafePrevTopEntryFrame() { return m_prevTopEntryFrame; }
};
extern "C" VMEntryRecord* vmEntryRecord(EntryFrame*);
} // namespace JSC
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