WebKit/Source/JavaScriptCore/interpreter/ProtoCallFrame.h at main · WebKit/WebKit · GitHub

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* 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 <JavaScriptCore/CodeBlock.h>

#include <JavaScriptCore/Register.h>

#include <JavaScriptCore/StackAlignment.h>

#include <wtf/ForbidHeapAllocation.h>

#include <wtf/Platform.h>

#if ENABLE(WEBASSEMBLY)

#include <JavaScriptCore/JSWebAssemblyInstance.h>

#endif

WTF_ALLOW_UNSAFE_BUFFER_USAGE_BEGIN

namespace JSC {

struct JS_EXPORT_PRIVATE ProtoCallFrame {

WTF_FORBID_HEAP_ALLOCATION;

public:

// CodeBlock, Callee, ArgumentCount, and |this|.

static constexpr unsigned numberOfRegisters { 4 };

JSCell* context { nullptr };

uint32_t paddedArgCount;

EncodedJSValue* args;

JSGlobalObject* globalObject;

inline void init(CodeBlock*, JSGlobalObject*, JSObject*, JSValue, JSCell* context, int, EncodedJSValue* otherArgs = nullptr);

inline CodeBlock* codeBlock() const;

inline void setCodeBlock(CodeBlock*);

inline JSObject* callee() const;

inline void setCallee(JSObject*);

void setGlobalObject(JSGlobalObject* object)

{

globalObject = object;

}

int argumentCountIncludingThis() const { return argCountAndCodeOriginValue.lowWord(); }

int argumentCount() const { return argumentCountIncludingThis() - 1; }

void setArgumentCountIncludingThis(int count) { argCountAndCodeOriginValue.lowWord() = count; }

void setPaddedArgCount(uint32_t argCount) { paddedArgCount = argCount; }

void clearCurrentVPC() { argCountAndCodeOriginValue.highWord() = 0; }

JSValue thisValue() const { return thisArg.Register::jsValue(); }

void setThisValue(JSValue value) { thisArg = value; }

#if ENABLE(WEBASSEMBLY)

void setWasmInstance(JSWebAssemblyInstance* instance)

{

codeBlockValue = instance;

}

#endif

JSValue argument(size_t argumentIndex)

{

ASSERT(static_cast<int>(argumentIndex) < argumentCount());

return JSValue::decode(args[argumentIndex]);

}

void setArgument(size_t argumentIndex, JSValue value)

{

ASSERT(static_cast<int>(argumentIndex) < argumentCount());

args[argumentIndex] = JSValue::encode(value);

}

};

} // namespace JSC

WTF_ALLOW_UNSAFE_BUFFER_USAGE_END

WebKit/Source/JavaScriptCore/interpreter/ProtoCallFrame.h at main · WebKit/WebKit · GitHub

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