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OMRSymbol.cpp
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OMRSymbol.cpp
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/*******************************************************************************
* Copyright (c) 2000, 2021 IBM Corp. and others
*
* This program and the accompanying materials are made available under
* the terms of the Eclipse Public License 2.0 which accompanies this
* distribution and is available at http://eclipse.org/legal/epl-2.0
* or the Apache License, Version 2.0 which accompanies this distribution
* and is available at https://www.apache.org/licenses/LICENSE-2.0.
*
* This Source Code may also be made available under the following Secondary
* Licenses when the conditions for such availability set forth in the
* Eclipse Public License, v. 2.0 are satisfied: GNU General Public License,
* version 2 with the GNU Classpath Exception [1] and GNU General Public
* License, version 2 with the OpenJDK Assembly Exception [2].
*
* [1] https://www.gnu.org/software/classpath/license.html
* [2] http://openjdk.java.net/legal/assembly-exception.html
*
* SPDX-License-Identifier: EPL-2.0 OR Apache-2.0 OR GPL-2.0 WITH Classpath-exception-2.0 OR LicenseRef-GPL-2.0 WITH Assembly-exception
*******************************************************************************/
#include <stddef.h>
#include <stdint.h>
#include <string.h>
#include "env/FrontEnd.hpp"
#include "compile/Compilation.hpp"
#include "compile/ResolvedMethod.hpp"
#include "compile/SymbolReferenceTable.hpp"
#include "env/KnownObjectTable.hpp"
#include "env/ObjectModel.hpp"
#include "env/TRMemory.hpp"
#include "il/AutomaticSymbol.hpp"
#include "il/DataTypes.hpp"
#include "il/RegisterMappedSymbol.hpp"
#include "il/StaticSymbol.hpp"
#include "il/Symbol.hpp"
#include "il/SymbolReference.hpp"
#include "infra/Assert.hpp"
#include "infra/Flags.hpp"
#include "ras/Debug.hpp"
template <typename AllocatorType>
TR::Symbol * OMR::Symbol::create(AllocatorType m)
{
return new (m) TR::Symbol();
}
template <typename AllocatorType>
TR::Symbol * OMR::Symbol::create(AllocatorType m, TR::DataType d)
{
return new (m) TR::Symbol(d);
}
template <typename AllocatorType>
TR::Symbol * OMR::Symbol::create(AllocatorType m, TR::DataType d, uint32_t s)
{
return new (m) TR::Symbol(d,s);
}
OMR::Symbol::Symbol(TR::DataType d) :
_size(0),
_name(0),
_flags(0),
_flags2(0),
_localIndex(0)
{
self()->setDataType(d);
}
OMR::Symbol::Symbol(TR::DataType d, uint32_t size) :
_name(0),
_flags(0),
_flags2(0),
_localIndex(0)
{
self()->setDataType(d);
_size = size;
}
bool
OMR::Symbol::isReferenced()
{
return self()->isVariableSizeSymbol() && self()->castToVariableSizeSymbol()->isReferenced();
}
bool
OMR::Symbol::dontEliminateStores(TR::Compilation *comp, bool isForLocalDeadStore)
{
return (self()->isAuto() && _flags.testAny(PinningArrayPointer)) ||
(self()->isParm() && _flags.testAny(ReinstatedReceiver)) ||
_flags.testAny(HoldsMonitoredObject) ||
(comp->getSymRefTab()->findThisRangeExtensionSymRef() && (self() == comp->getSymRefTab()->findThisRangeExtensionSymRef()->getSymbol()));
}
uint32_t
OMR::Symbol::getNumberOfSlots()
{
uint32_t numSlots = self()->getRoundedSize()/self()->convertTypeToSize(TR::Address);
// We should always give at least 1 slot.
// This is specifically for the case of an int type on 64bit pltfrms
return (numSlots? numSlots : 1);
}
TR::DataType
OMR::Symbol::convertSigCharToType(char sigChar)
{
switch (sigChar)
{
case 'Z': return TR::Int8;
case 'B': return TR::Int8;
case 'C': return TR::Int16;
case 'S': return TR::Int16;
case 'I': return TR::Int32;
case 'J': return TR::Int64;
case 'F': return TR::Float;
case 'D': return TR::Double;
case 'L':
case 'Q':
case '[': return TR::Address;
}
TR_ASSERT(0, "unknown signature character");
return TR::Int32;
}
/**
* Sets the data type of a symbol, and the size, if the size can be inferred
* from the data type.
*/
void
OMR::Symbol::setDataType(TR::DataType dt)
{
uint32_t inferredSize = TR::DataType::getSize(dt);
if (inferredSize)
{
_size = inferredSize;
}
_flags.setValue(DataTypeMask, dt);
}
uint32_t
OMR::Symbol::getRoundedSize()
{
int32_t roundedSize = (int32_t)((self()->getSize()+3)&(~3)); // cast explicitly
return roundedSize ? roundedSize : 4;
}
int32_t
OMR::Symbol::getOffset()
{
TR::RegisterMappedSymbol * r = self()->getRegisterMappedSymbol();
return r ? r->getOffset() : 0;
}
/*
* Static factory methods
*/
template <typename AllocatorType>
TR::Symbol * OMR::Symbol::createShadow(AllocatorType m)
{
TR::Symbol * sym = new (m) TR::Symbol();
sym->_flags.setValue(KindMask, IsShadow);
return sym;
}
template <typename AllocatorType>
TR::Symbol * OMR::Symbol::createShadow(AllocatorType m, TR::DataType d)
{
TR::Symbol * sym = new (m) TR::Symbol(d);
sym->_flags.setValue(KindMask, IsShadow);
return sym;
}
template <typename AllocatorType>
TR::Symbol * OMR::Symbol::createShadow(AllocatorType m, TR::DataType d, uint32_t s)
{
TR::Symbol * sym = new (m) TR::Symbol(d,s);
sym->_flags.setValue(KindMask, IsShadow);
return sym;
}
template <typename AllocatorType>
TR::Symbol * OMR::Symbol::createNamedShadow(AllocatorType m, TR::DataType d, uint32_t s, char *name)
{
auto * sym = createShadow(m,d,s);
sym->_name = name;
sym->_flags2.set(NamedShadow);
return sym;
}
/*
* Explicit instantiation of factories for each TR_Memory type.
*/
template TR::Symbol * OMR::Symbol::create(TR_StackMemory);
template TR::Symbol * OMR::Symbol::create(TR_HeapMemory);
template TR::Symbol * OMR::Symbol::create(PERSISTENT_NEW_DECLARE);
template TR::Symbol * OMR::Symbol::create(TR_StackMemory, TR::DataType);
template TR::Symbol * OMR::Symbol::create(TR_HeapMemory, TR::DataType);
template TR::Symbol * OMR::Symbol::create(PERSISTENT_NEW_DECLARE, TR::DataType);
template TR::Symbol * OMR::Symbol::create(TR_StackMemory, TR::DataType, uint32_t);
template TR::Symbol * OMR::Symbol::create(TR_HeapMemory, TR::DataType, uint32_t);
template TR::Symbol * OMR::Symbol::create(PERSISTENT_NEW_DECLARE, TR::DataType, uint32_t);
template TR::Symbol * OMR::Symbol::createShadow(TR_StackMemory);
template TR::Symbol * OMR::Symbol::createShadow(TR_HeapMemory);
template TR::Symbol * OMR::Symbol::createShadow(PERSISTENT_NEW_DECLARE);
template TR::Symbol * OMR::Symbol::createShadow(TR_StackMemory, TR::DataType);
template TR::Symbol * OMR::Symbol::createShadow(TR_HeapMemory, TR::DataType);
template TR::Symbol * OMR::Symbol::createShadow(PERSISTENT_NEW_DECLARE, TR::DataType);
template TR::Symbol * OMR::Symbol::createShadow(TR_StackMemory, TR::DataType, uint32_t);
template TR::Symbol * OMR::Symbol::createShadow(TR_HeapMemory, TR::DataType, uint32_t);
template TR::Symbol * OMR::Symbol::createShadow(PERSISTENT_NEW_DECLARE, TR::DataType, uint32_t);
template TR::Symbol * OMR::Symbol::createNamedShadow(TR_StackMemory, TR::DataType, uint32_t, char *);
template TR::Symbol * OMR::Symbol::createNamedShadow(TR_HeapMemory, TR::DataType, uint32_t, char *);
template TR::Symbol * OMR::Symbol::createNamedShadow(PERSISTENT_NEW_DECLARE, TR::DataType, uint32_t, char *);