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69 lines
2.8 KiB
Java
69 lines
2.8 KiB
Java
/*
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* Copyright (c) 2022, 2025, Oracle and/or its affiliates. All rights reserved.
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* This code is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 only, as
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* published by the Free Software Foundation. Oracle designates this
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* particular file as subject to the "Classpath" exception as provided
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* by Oracle in the LICENSE file that accompanied this code.
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*
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* This code is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* version 2 for more details (a copy is included in the LICENSE file that
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* accompanied this code).
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*
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* You should have received a copy of the GNU General Public License version
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* 2 along with this work; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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* or visit www.oracle.com if you need additional information or have any
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* questions.
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*/
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package java.lang.classfile;
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import java.lang.classfile.attribute.CodeAttribute;
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import java.lang.classfile.instruction.*;
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import jdk.internal.classfile.impl.AbstractInstruction;
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/**
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* Models an executable instruction in the {@code code} array of the {@link
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* CodeAttribute Code} attribute of a method. The order of instructions in
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* a {@link CodeModel} is significant.
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* <p>
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* The {@link #opcode() opcode} identifies the operation of an instruction.
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* Each {@linkplain Opcode#kind() kind} of opcode has its own modeling interface
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* for instructions.
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*
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* @see Opcode
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* @jvms 6.5 Instructions
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* @sealedGraph
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* @since 24
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*/
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public sealed interface Instruction extends CodeElement
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permits ArrayLoadInstruction, ArrayStoreInstruction, BranchInstruction,
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ConstantInstruction, ConvertInstruction, DiscontinuedInstruction,
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FieldInstruction, InvokeDynamicInstruction, InvokeInstruction,
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LoadInstruction, StoreInstruction, IncrementInstruction,
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LookupSwitchInstruction, MonitorInstruction, NewMultiArrayInstruction,
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NewObjectInstruction, NewPrimitiveArrayInstruction, NewReferenceArrayInstruction,
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NopInstruction, OperatorInstruction, ReturnInstruction,
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StackInstruction, TableSwitchInstruction,
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ThrowInstruction, TypeCheckInstruction, AbstractInstruction {
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/**
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* {@return the operation of this instruction}
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*/
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Opcode opcode();
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/**
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* {@return the size in bytes of this instruction}
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* This value is equal to {@link Opcode#sizeIfFixed()
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* opcode().sizeIfFixed()} if it is not {@code -1}.
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*/
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int sizeInBytes();
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}
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