interpreter/ProtoCallFrame.h

   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
  31 namespace JSC {
  32
  33 struct 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