1/*
2 * Copyright (C) 2014-2018 Apple Inc. All rights reserved.
3 *
4 * Redistribution and use in source and binary forms, with or without
5 * modification, are permitted provided that the following conditions
6 * are met:
7 * 1. Redistributions of source code must retain the above copyright
8 * notice, this list of conditions and the following disclaimer.
9 * 2. Redistributions in binary form must reproduce the above copyright
10 * notice, this list of conditions and the following disclaimer in the
11 * documentation and/or other materials provided with the distribution.
12 *
13 * THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY
14 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
15 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
16 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR
17 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
18 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
19 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
20 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
21 * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
22 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
23 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
24 */
25
26#pragma once
27
28#include "GPRInfo.h"
29
30namespace JSC {
31
32struct EntryFrame;
33class CallFrame;
34class JSGlobalObject;
35class JSObject;
36class VM;
37
38struct VMEntryRecord {
39 /*
40 * This record stored in a vmEntryTo{JavaScript,Host} allocated frame. It is allocated on the stack
41 * after callee save registers where local variables would go.
42 */
43 VM* m_vm;
44 CallFrame* m_prevTopCallFrame;
45 EntryFrame* m_prevTopEntryFrame;
46 JSObject* m_callee;
47
48 JSObject* callee() const { return m_callee; }
49
50#if !ENABLE(C_LOOP) && NUMBER_OF_CALLEE_SAVES_REGISTERS > 0
51 CPURegister calleeSaveRegistersBuffer[NUMBER_OF_CALLEE_SAVES_REGISTERS];
52#elif ENABLE(C_LOOP)
53 CPURegister calleeSaveRegistersBuffer[1];
54#endif
55
56 CallFrame* prevTopCallFrame() { return m_prevTopCallFrame; }
57 SUPPRESS_ASAN CallFrame* unsafePrevTopCallFrame() { return m_prevTopCallFrame; }
58
59 EntryFrame* prevTopEntryFrame() { return m_prevTopEntryFrame; }
60 SUPPRESS_ASAN EntryFrame* unsafePrevTopEntryFrame() { return m_prevTopEntryFrame; }
61};
62
63extern "C" VMEntryRecord* vmEntryRecord(EntryFrame*);
64
65} // namespace JSC
66