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JITCompilationKey.h
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91 lines (72 loc) · 2.88 KB
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/*
* Copyright (C) 2013-2021 Apple Inc. All rights reserved.
*
* 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 "JITCompilationMode.h"
#include <wtf/HashMap.h>
namespace JSC {
class JSCell;
class JITCompilationKey {
public:
JITCompilationKey()
: m_codeBlock(nullptr)
, m_mode(JITCompilationMode::InvalidCompilation)
{
}
JITCompilationKey(WTF::HashTableDeletedValueType)
: m_codeBlock(nullptr)
, m_mode(JITCompilationMode::DFG)
{
}
JITCompilationKey(JSCell* profiledBlock, JITCompilationMode mode)
: m_codeBlock(profiledBlock)
, m_mode(mode)
{
}
explicit operator bool() const
{
return m_codeBlock || m_mode != JITCompilationMode::InvalidCompilation;
}
bool isHashTableDeletedValue() const
{
return !m_codeBlock && m_mode != JITCompilationMode::InvalidCompilation;
}
static constexpr bool safeToCompareToHashTableEmptyOrDeletedValue = true;
JITCompilationMode mode() const { return m_mode; }
friend bool operator==(const JITCompilationKey&, const JITCompilationKey&) = default;
unsigned hash() const
{
return WTF::pairIntHash(WTF::PtrHash<JSCell*>::hash(m_codeBlock), static_cast<std::underlying_type_t<JITCompilationMode>>(m_mode));
}
void dump(PrintStream&) const;
private:
// Either CodeBlock* or UnlinkedCodeBlock* for basleline JIT.
JSCell* m_codeBlock;
JITCompilationMode m_mode;
};
} // namespace JSC
namespace WTF {
template<typename T> struct HashTraits;
template<> struct HashTraits<JSC::JITCompilationKey> : SimpleClassHashTraits<JSC::JITCompilationKey> { };
} // namespace WTF