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/*
* Copyright (C) 2013-2015 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.
*/
#pragma once
#if ENABLE(FTL_JIT)
#include "CCallHelpers.h"
#include "FTLSlowPathCallKey.h"
#include "JITOperations.h"
namespace JSC { namespace FTL {
class State;
class SlowPathCall {
public:
SlowPathCall() { }
SlowPathCall(MacroAssembler::Call call, const SlowPathCallKey& key)
: m_call(call)
, m_key(key)
{
}
MacroAssembler::Call call() const { return m_call; }
SlowPathCallKey key() const { return m_key; }
private:
MacroAssembler::Call m_call;
SlowPathCallKey m_key;
};
// This will be an RAII thingy that will set up the necessary stack sizes and offsets and such.
class SlowPathCallContext {
public:
SlowPathCallContext(RegisterSet usedRegisters, CCallHelpers&, unsigned numArgs, GPRReg returnRegister);
~SlowPathCallContext();
// NOTE: The call that this returns is already going to be linked by the JIT using addLinkTask(),
// so there is no need for you to link it yourself.
SlowPathCall makeCall(void* callTarget);
private:
SlowPathCallKey keyWithTarget(void* callTarget) const;
RegisterSet m_argumentRegisters;
RegisterSet m_callingConventionRegisters;
CCallHelpers& m_jit;
unsigned m_numArgs;
GPRReg m_returnRegister;
size_t m_offsetToSavingArea;
size_t m_stackBytesNeeded;
RegisterSet m_thunkSaveSet;
ptrdiff_t m_offset;
};
template<typename... ArgumentTypes>
SlowPathCall callOperation(
const RegisterSet& usedRegisters, CCallHelpers& jit, CCallHelpers::JumpList* exceptionTarget,
FunctionPtr function, GPRReg resultGPR, ArgumentTypes... arguments)
{
SlowPathCall call;
{
SlowPathCallContext context(usedRegisters, jit, sizeof...(ArgumentTypes) + 1, resultGPR);
jit.setupArgumentsWithExecState(arguments...);
call = context.makeCall(function.value());
}
if (exceptionTarget)
exceptionTarget->append(jit.emitExceptionCheck());
return call;
}
template<typename... ArgumentTypes>
SlowPathCall callOperation(
const RegisterSet& usedRegisters, CCallHelpers& jit, CallSiteIndex callSiteIndex,
CCallHelpers::JumpList* exceptionTarget, FunctionPtr function, GPRReg resultGPR,
ArgumentTypes... arguments)
{
if (callSiteIndex) {
jit.store32(
CCallHelpers::TrustedImm32(callSiteIndex.bits()),
CCallHelpers::tagFor(CallFrameSlot::argumentCount));
}
return callOperation(usedRegisters, jit, exceptionTarget, function, resultGPR, arguments...);
}
CallSiteIndex callSiteIndexForCodeOrigin(State&, CodeOrigin);
template<typename... ArgumentTypes>
SlowPathCall callOperation(
State& state, const RegisterSet& usedRegisters, CCallHelpers& jit, CodeOrigin codeOrigin,
CCallHelpers::JumpList* exceptionTarget, FunctionPtr function, GPRReg result, ArgumentTypes... arguments)
{
return callOperation(
usedRegisters, jit, callSiteIndexForCodeOrigin(state, codeOrigin), exceptionTarget, function,
result, arguments...);
}
} } // namespace JSC::FTL
#endif // ENABLE(FTL_JIT)
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