1/*
2 * Copyright (C) 2013 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#ifndef ProtoCallFrame_h
27#define ProtoCallFrame_h
28
29#include "Register.h"
30
31namespace JSC {
32
33struct ProtoCallFrame {
34 Register codeBlockValue;
35 Register calleeValue;
36 Register argCountAndCodeOriginValue;
37 Register thisArg;
38 uint32_t paddedArgCount;
39 bool arityMissMatch;
40 JSValue *args;
41
42 void init(CodeBlock*, JSObject*, JSValue, int, JSValue* otherArgs = 0);
43
44 CodeBlock* codeBlock() const { return codeBlockValue.Register::codeBlock(); }
45 void setCodeBlock(CodeBlock* codeBlock) { codeBlockValue = codeBlock; }
46
47 JSObject* callee() const { return calleeValue.Register::object(); }
48 void setCallee(JSObject* callee) { calleeValue = callee; }
49
50 int argumentCountIncludingThis() const { return argCountAndCodeOriginValue.payload(); }
51 int argumentCount() const { return argumentCountIncludingThis() - 1; }
52 void setArgumentCountIncludingThis(int count) { argCountAndCodeOriginValue.payload() = count; }
53 void setPaddedArgCount(uint32_t argCount) { paddedArgCount = argCount; }
54
55 void clearCurrentVPC() { argCountAndCodeOriginValue.tag() = 0; }
56
57 JSValue thisValue() const { return thisArg.Register::jsValue(); }
58 void setThisValue(JSValue value) { thisArg = value; }
59
60 bool needArityCheck() { return arityMissMatch; }
61
62 JSValue argument(size_t argumentIndex)
63 {
64 ASSERT(static_cast<int>(argumentIndex) < argumentCount());
65 return args[argumentIndex];
66 }
67 void setArgument(size_t argumentIndex, JSValue value)
68 {
69 ASSERT(static_cast<int>(argumentIndex) < argumentCount());
70 args[argumentIndex] = value;
71 }
72};
73
74} // namespace JSC
75
76#endif // ProtoCallFrame_h
77