mirror of
https://github.com/darlinghq/darling-JavaScriptCore.git
synced 2025-04-12 11:52:56 +00:00
55 lines
2.0 KiB
C++
55 lines
2.0 KiB
C++
/*
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* Copyright (C) 2019 Apple Inc. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
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* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
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* THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
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* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
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* THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#pragma once
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#include "JSCJSValue.h"
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#include "JSCell.h"
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#include "Options.h"
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namespace JSC {
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inline bool scribbleFreeCells()
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{
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return ASSERT_ENABLED || Options::scribbleFreeCells();
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}
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#define SCRIBBLE_WORD static_cast<intptr_t>(0xbadbeef0)
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inline bool isScribbledValue(JSValue value)
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{
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return JSValue::encode(value) == JSValue::encode(bitwise_cast<JSCell*>(SCRIBBLE_WORD));
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}
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inline void scribble(void* base, size_t size)
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{
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for (size_t i = size / sizeof(EncodedJSValue); i--;) {
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// Use a 16-byte aligned value to ensure that it passes the cell check.
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static_cast<EncodedJSValue*>(base)[i] = JSValue::encode(bitwise_cast<JSCell*>(SCRIBBLE_WORD));
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}
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}
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}
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