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/*
* Copyright (C) 2015 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.
*/
#ifndef PolymorphicCallStubRoutine_h
#define PolymorphicCallStubRoutine_h
#if ENABLE(JIT)
#include "CallEdge.h"
#include "CallVariant.h"
#include "CodeOrigin.h"
#include "GCAwareJITStubRoutine.h"
#include <wtf/FastMalloc.h>
#include <wtf/Noncopyable.h>
#include <wtf/Vector.h>
namespace JSC {
class CallLinkInfo;
class PolymorphicCallNode : public BasicRawSentinelNode<PolymorphicCallNode> {
WTF_MAKE_NONCOPYABLE(PolymorphicCallNode);
public:
PolymorphicCallNode(CallLinkInfo* info)
: m_callLinkInfo(info)
{
}
~PolymorphicCallNode();
void unlink(VM&);
bool hasCallLinkInfo(CallLinkInfo* info) { return m_callLinkInfo == info; }
void clearCallLinkInfo();
private:
CallLinkInfo* m_callLinkInfo;
};
class PolymorphicCallCase {
public:
PolymorphicCallCase()
: m_codeBlock(nullptr)
{
}
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* m_codeBlock;
};
class PolymorphicCallStubRoutine : public GCAwareJITStubRoutine {
public:
PolymorphicCallStubRoutine(
const MacroAssemblerCodeRef&, VM&, const JSCell* owner,
ExecState* callerFrame, CallLinkInfo&, const Vector<PolymorphicCallCase>&,
std::unique_ptr<uint32_t[]> fastCounts);
virtual ~PolymorphicCallStubRoutine();
CallVariantList variants() const;
CallEdgeList edges() const;
void clearCallNodesFor(CallLinkInfo*);
bool visitWeak(VM&) override;
protected:
virtual void markRequiredObjectsInternal(SlotVisitor&) override;
private:
Vector<WriteBarrier<JSCell>, 2> m_variants;
std::unique_ptr<uint32_t[]> m_fastCounts;
Bag<PolymorphicCallNode> m_callNodes;
};
} // namespace JSC
#endif // ENABLE(JIT)
#endif // PolymorphicCallStubRoutine_h
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