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OMRSnippet.hpp
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OMRSnippet.hpp
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/*******************************************************************************
* Copyright (c) 2000, 2020 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
*******************************************************************************/
#ifndef OMR_Z_SNIPPET_INCL
#define OMR_Z_SNIPPET_INCL
/*
* The following #define and typedef must appear before any #includes in this file
*/
#ifndef OMR_SNIPPET_CONNECTOR
#define OMR_SNIPPET_CONNECTOR
namespace OMR { namespace Z { class Snippet; } }
namespace OMR { typedef OMR::Z::Snippet SnippetConnector; }
#else
#error OMR::Z::Snippet expected to be a primary connector, but an OMR connector is already defined
#endif
#include "compiler/codegen/OMRSnippet.hpp"
#include <stdint.h>
#include "codegen/InstOpCode.hpp"
#include "env/jittypes.h"
#include "infra/Flags.hpp"
namespace TR { class CodeGenerator; }
namespace TR { class LabelSymbol; }
namespace TR { class Node; }
namespace TR { class SymbolReference; }
namespace OMR
{
namespace Z
{
class OMR_EXTENSIBLE Snippet : public OMR::Snippet
{
/** offset from the codebase -- the 1st Snippet code location */
int32_t _codeBaseOffset;
int8_t _pad_bytes;
flags16_t _zflags;
/** For trace files: Snippet Target Address (addr of helper method/trampoline). */
intptr_t _snippetDestAddr;
public:
Snippet(TR::CodeGenerator *cg, TR::Node * node, TR::LabelSymbol *lab, bool requiresGCMap);
Snippet(TR::CodeGenerator *cg, TR::Node *node, TR::LabelSymbol *label);
enum Kind
{
IsUnknown,
IsCall,
IsUnresolvedCall,
IsVirtual,
IsVirtualUnresolved,
IsInterfaceCall,
IsHelperCall,
IsRecompilation,
IsStackCheckFailure,
IsUnresolvedData,
IsConstantData,
IsConstantInstruction,
IsWritableData,
IsEyeCatcherData,
IsInterfaceCallData,
IsForceRecompData,
IsJNICallData,
IsHeapAlloc,
IsForceRecomp,
IsMonitorEnter,
IsMonitorExit,
IsRestoreGPR7,
numKinds
};
virtual Kind getKind() { return IsUnknown; }
int32_t setCodeBaseOffset(int32_t offset) { return _codeBaseOffset=offset; }
int32_t getCodeBaseOffset() { return _codeBaseOffset; }
int8_t setPadBytes(int8_t numOfBytes) { return _pad_bytes=numOfBytes; }
int8_t getPadBytes() { return _pad_bytes; }
intptr_t setSnippetDestAddr(intptr_t addr) {return _snippetDestAddr = addr;}
intptr_t getSnippetDestAddr() {return _snippetDestAddr;}
/** Helper method to reload VM Thread into GPR13 */
uint8_t *generateLoadVMThreadInstruction(TR::CodeGenerator *cg, uint8_t *cursor);
uint32_t getLoadVMThreadInstructionLength(TR::CodeGenerator *cg);
// helper methods to insert Runtime Instrumentation hooks
uint8_t *generateRuntimeInstrumentationOnOffInstruction(TR::CodeGenerator *cg, uint8_t *cursor, TR::InstOpCode::Mnemonic op, bool isPrivateLinkage = false);
uint32_t getRuntimeInstrumentationOnOffInstructionLength(TR::CodeGenerator *cg, bool isPrivateLinkage = false);
//functions to access literal pool flag
bool getNeedLitPoolBasePtr() { return _zflags.testAny(NeedLitPoolBasePtr); }
void setNeedLitPoolBasePtr() { _zflags.set(NeedLitPoolBasePtr); }
void resetNeedLitPoolBasePtr() { _zflags.reset(NeedLitPoolBasePtr); }
// For trace files: whether snippet used MCC trampoline to reach target
void setUsedTrampoline(bool used) { return _zflags.set(UsedTrampoline, used); }
bool usedTrampoline() { return _zflags.testAny(UsedTrampoline); }
// Whether snippet was used or not.
bool getIsUsed() { return _zflags.testAny(IsUsed); }
void setIsUsed(bool isUsed) { return _zflags.set(IsUsed, isUsed); }
private:
enum // _zflags
{
NeedLitPoolBasePtr = 0x0001, ///< For determining the proper load instructions for accessing the literal pool
UsedTrampoline = 0x0002, ///< For trace files: Whether Snippet uses MCC trampoline to reach target.
IsUsed = 0x0004, ///< Whether current snippet was used or not.
DummyLastEnum
};
};
}
}
#endif