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CachedBytecode.h
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/*
* Copyright (C) 2019 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 "CacheUpdate.h"
#include "LeafExecutable.h"
#include "ParserModes.h"
#include <wtf/MallocPtr.h>
#include <wtf/Noncopyable.h>
#include <wtf/RefCounted.h>
#include <wtf/Vector.h>
namespace JSC {
class UnlinkedFunctionExecutable;
class CachedBytecode : public RefCounted<CachedBytecode> {
WTF_MAKE_NONCOPYABLE(CachedBytecode);
public:
static Ref<CachedBytecode> create()
{
return adoptRef(*new CachedBytecode(CachePayload::makeEmptyPayload()));
}
static Ref<CachedBytecode> create(FileSystem::MappedFileData&& data, LeafExecutableMap&& leafExecutables = { })
{
return adoptRef(*new CachedBytecode(CachePayload::makeMappedPayload(WTFMove(data)), WTFMove(leafExecutables)));
}
static Ref<CachedBytecode> create(MallocPtr<uint8_t, VMMalloc>&& data, size_t size, LeafExecutableMap&& leafExecutables)
{
return adoptRef(*new CachedBytecode(CachePayload::makeMallocPayload(WTFMove(data), size), WTFMove(leafExecutables)));
}
LeafExecutableMap& leafExecutables() { return m_leafExecutables; }
JS_EXPORT_PRIVATE void addGlobalUpdate(Ref<CachedBytecode>);
JS_EXPORT_PRIVATE void addFunctionUpdate(const UnlinkedFunctionExecutable*, CodeSpecializationKind, Ref<CachedBytecode>);
using ForEachUpdateCallback = Function<void(off_t, const void*, size_t)>;
JS_EXPORT_PRIVATE void commitUpdates(const ForEachUpdateCallback&) const;
const uint8_t* data() const { return m_payload.data(); }
size_t size() const { return m_payload.size(); }
bool hasUpdates() const { return !m_updates.isEmpty(); }
size_t sizeForUpdate() const { return m_size; }
private:
CachedBytecode(CachePayload&& payload, LeafExecutableMap&& leafExecutables = { })
: m_size(payload.size())
, m_payload(WTFMove(payload))
, m_leafExecutables(WTFMove(leafExecutables))
{
}
void copyLeafExecutables(const CachedBytecode&);
size_t m_size { 0 };
CachePayload m_payload;
LeafExecutableMap m_leafExecutables;
Vector<CacheUpdate> m_updates;
};
} // namespace JSC