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/*
* Copyright (C) 2015-2022 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 "CallEdge.h"
#include "CallLinkInfoBase.h"
#include "CallVariant.h"
#include "GCAwareJITStubRoutine.h"
#include <wtf/ButterflyArray.h>
#include <wtf/Noncopyable.h>
#include <wtf/UniqueArray.h>
#include <wtf/Vector.h>
namespace JSC {
class CallLinkInfo;
class PolymorphicCallNode final : public CallLinkInfoBase {
WTF_MAKE_NONCOPYABLE(PolymorphicCallNode);
public:
PolymorphicCallNode()
: CallLinkInfoBase(CallSiteType::PolymorphicCallNode)
{
}
void initialize(uint8_t index, uint8_t totalSize)
{
m_index = index;
m_totalSize = totalSize;
m_cleared = false;
}
void unlinkOrUpgradeImpl(VM&, CodeBlock*, CodeBlock*);
void clear();
PolymorphicCallStubRoutine* owner();
private:
uint8_t m_index { 0 };
uint8_t m_totalSize { 0 };
bool m_cleared { true };
};
class PolymorphicCallCase {
public:
PolymorphicCallCase() = default;
PolymorphicCallCase(CallVariant variant, CodeBlock* codeBlock)
: m_variant(variant)
, m_codeBlock(codeBlock)
{
}
CallVariant variant() const { return m_variant; }
CodeBlock* codeBlock() const { return m_codeBlock; }
void dump(PrintStream&) const;
private:
CallVariant m_variant;
CodeBlock* const m_codeBlock { nullptr };
};
class PolymorphicCallStubRoutine final : public GCAwareJITStubRoutine, public ButterflyArray<PolymorphicCallStubRoutine, PolymorphicCallNode, CallSlot> {
public:
using Base = GCAwareJITStubRoutine;
friend class JITStubRoutine;
CallVariantList variants() const;
bool hasEdges() const;
CallEdgeList edges() const;
void clearCallNodesFor(CallLinkInfo*);
template<typename Functor>
void forEachDependentCell(const Functor& functor) const
{
for (unsigned i = 0, size = std::size(trailingSpan()) - 1; i < size; ++i)
functor(trailingSpan()[i].m_calleeOrExecutable);
}
static Ref<PolymorphicCallStubRoutine> create(const MacroAssemblerCodeRef<JITStubRoutinePtrTag>& code, VM& vm, JSCell* owner, CallFrame* callerFrame, CallLinkInfo& callLinkInfo, const Vector<CallSlot, 16>& callSlots, bool notUsingCounting, bool isClosureCall)
{
return adoptRef(*createImpl(callSlots.size(), callSlots.size() + /* sentinel */ 1, code, vm, owner, callerFrame, callLinkInfo, callSlots, notUsingCounting, isClosureCall));
}
PolymorphicCallStubRoutine(unsigned headerSize, unsigned trailingSize, const MacroAssemblerCodeRef<JITStubRoutinePtrTag>&, VM&, JSCell* owner, CallFrame* callerFrame, CallLinkInfo&, const Vector<CallSlot, 16>&, bool notUsingCounting, bool isClosureCall);
using ButterflyArray<PolymorphicCallStubRoutine, PolymorphicCallNode, CallSlot>::operator delete;
CallLinkInfo* callLinkInfo() const { return m_callLinkInfo; }
static void destroy(PolymorphicCallStubRoutine*);
bool upgradeIfPossible(VM&, CodeBlock*, CodeBlock*, uint8_t);
bool isClosureCall() const { return m_isClosureCall; }
private:
void markRequiredObjectsImpl(AbstractSlotVisitor&);
void markRequiredObjectsImpl(SlotVisitor&);
bool visitWeakImpl(VM&);
CallLinkInfo* m_callLinkInfo { nullptr };
bool m_notUsingCounting : 1 { false };
bool m_isClosureCall : 1 { false };
};
} // namespace JSC
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