WebKit/Source/JavaScriptCore/jit/JITCompilationKey.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 "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

WebKit/Source/JavaScriptCore/jit/JITCompilationKey.h at main · WebKit/WebKit · GitHub

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