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/*
* Copyright (C) 2018 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
#if ENABLE(JIT)
#include "CodeLocation.h"
#include <wtf/StdLibExtras.h>
#include <wtf/Vector.h>
namespace JSC {
class JITCodeMap {
private:
struct Entry {
Entry() { }
Entry(unsigned bytecodeIndex, CodeLocationLabel<JSEntryPtrTag> codeLocation)
: m_bytecodeIndex(bytecodeIndex)
, m_codeLocation(codeLocation)
{ }
inline unsigned bytecodeIndex() const { return m_bytecodeIndex; }
inline CodeLocationLabel<JSEntryPtrTag> codeLocation() { return m_codeLocation; }
private:
unsigned m_bytecodeIndex;
CodeLocationLabel<JSEntryPtrTag> m_codeLocation;
};
public:
void append(unsigned bytecodeIndex, CodeLocationLabel<JSEntryPtrTag> codeLocation)
{
m_entries.append({ bytecodeIndex, codeLocation });
}
void finish() { m_entries.shrinkToFit(); }
CodeLocationLabel<JSEntryPtrTag> find(unsigned bytecodeIndex) const
{
auto* entry =
binarySearch<Entry, unsigned>(m_entries,
m_entries.size(), bytecodeIndex, [] (Entry* entry) {
return entry->bytecodeIndex();
});
if (!entry)
return CodeLocationLabel<JSEntryPtrTag>();
return entry->codeLocation();
}
explicit operator bool() const { return m_entries.size(); }
private:
Vector<Entry> m_entries;
};
} // namespace JSC
#endif // ENABLE(JIT)