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/*
* Copyright (C) 2012, 2014 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 CallLinkInfo_h
#define CallLinkInfo_h
#include "CallEdgeProfile.h"
#include "ClosureCallStubRoutine.h"
#include "CodeLocation.h"
#include "CodeSpecializationKind.h"
#include "JITWriteBarrier.h"
#include "JSFunction.h"
#include "Opcode.h"
#include "WriteBarrier.h"
#include <wtf/OwnPtr.h>
#include <wtf/SentinelLinkedList.h>
namespace JSC {
#if ENABLE(JIT)
class RepatchBuffer;
struct CallLinkInfo : public BasicRawSentinelNode<CallLinkInfo> {
enum CallType { None, Call, CallVarargs, Construct, ConstructVarargs };
static CallType callTypeFor(OpcodeID opcodeID)
{
if (opcodeID == op_call || opcodeID == op_call_eval)
return Call;
if (opcodeID == op_construct)
return Construct;
if (opcodeID == op_construct_varargs)
return ConstructVarargs;
ASSERT(opcodeID == op_call_varargs);
return CallVarargs;
}
CallLinkInfo()
: isFTL(false)
, hasSeenShouldRepatch(false)
, hasSeenClosure(false)
, callType(None)
, slowPathCount(0)
{
}
~CallLinkInfo()
{
if (isOnList())
remove();
}
CodeSpecializationKind specializationKind() const
{
return specializationFromIsConstruct(callType == Construct || callType == ConstructVarargs);
}
CodeLocationNearCall callReturnLocation;
CodeLocationDataLabelPtr hotPathBegin;
CodeLocationNearCall hotPathOther;
JITWriteBarrier<JSFunction> callee;
WriteBarrier<JSFunction> lastSeenCallee;
RefPtr<ClosureCallStubRoutine> stub;
bool isFTL : 1;
bool hasSeenShouldRepatch : 1;
bool hasSeenClosure : 1;
unsigned callType : 5; // CallType
unsigned calleeGPR : 8;
unsigned slowPathCount;
CodeOrigin codeOrigin;
OwnPtr<CallEdgeProfile> callEdgeProfile;
bool isLinked() { return stub || callee; }
void unlink(RepatchBuffer&);
bool seenOnce()
{
return hasSeenShouldRepatch;
}
void setSeen()
{
hasSeenShouldRepatch = true;
}
void visitWeak(RepatchBuffer&);
static CallLinkInfo& dummy();
};
inline CodeOrigin getCallLinkInfoCodeOrigin(CallLinkInfo& callLinkInfo)
{
return callLinkInfo.codeOrigin;
}
typedef HashMap<CodeOrigin, CallLinkInfo*, CodeOriginApproximateHash> CallLinkInfoMap;
#else // ENABLE(JIT)
typedef HashMap<int, void*> CallLinkInfoMap;
#endif // ENABLE(JIT)
} // namespace JSC
#endif // CallLinkInfo_h
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