311 lines
12 KiB
Java
311 lines
12 KiB
Java
/***
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* ASM: a very small and fast Java bytecode manipulation framework
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* Copyright (c) 2000,2002,2003 INRIA, France Telecom
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. Neither the name of the copyright holders nor the names of its
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* contributors may be used to endorse or promote products derived from
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* this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
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* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
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* THE POSSIBILITY OF SUCH DAMAGE.
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*
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* Contact: Eric.Bruneton@rd.francetelecom.com
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*
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* Author: Eric Bruneton
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*/
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package org.objectweb.asm;
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/**
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* A visitor to visit the bytecode instructions of a Java method. The methods
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* of this visitor must be called in the sequential order of the bytecode
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* instructions of the visited code. The {@link #visitMaxs visitMaxs} method
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* must be called after all the instructions have been visited. The {@link
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* #visitTryCatchBlock visitTryCatchBlock}, {@link #visitLocalVariable
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* visitLocalVariable} and {@link #visitLineNumber visitLineNumber} methods may
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* be called in any order, at any time (provided the labels passed as arguments
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* have already been visited with {@link #visitLabel visitLabel}).
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*/
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public interface CodeVisitor {
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/**
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* Visits a zero operand instruction.
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*
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* @param opcode the opcode of the instruction to be visited. This opcode is
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* either NOP, ACONST_NULL, ICONST_M1, ICONST_0, ICONST_1, ICONST_2,
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* ICONST_3, ICONST_4, ICONST_5, LCONST_0, LCONST_1, FCONST_0, FCONST_1,
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* FCONST_2, DCONST_0, DCONST_1,
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*
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* IALOAD, LALOAD, FALOAD, DALOAD, AALOAD, BALOAD, CALOAD, SALOAD,
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* IASTORE, LASTORE, FASTORE, DASTORE, AASTORE, BASTORE, CASTORE,
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* SASTORE,
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*
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* POP, POP2, DUP, DUP_X1, DUP_X2, DUP2, DUP2_X1, DUP2_X2, SWAP,
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*
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* IADD, LADD, FADD, DADD, ISUB, LSUB, FSUB, DSUB, IMUL, LMUL, FMUL,
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* DMUL, IDIV, LDIV, FDIV, DDIV, IREM, LREM, FREM, DREM, INEG, LNEG,
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* FNEG, DNEG, ISHL, LSHL, ISHR, LSHR, IUSHR, LUSHR, IAND, LAND, IOR,
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* LOR, IXOR, LXOR,
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*
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* I2L, I2F, I2D, L2I, L2F, L2D, F2I, F2L, F2D, D2I, D2L, D2F, I2B, I2C,
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* I2S,
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*
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* LCMP, FCMPL, FCMPG, DCMPL, DCMPG,
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*
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* IRETURN, LRETURN, FRETURN, DRETURN, ARETURN, RETURN,
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*
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* ARRAYLENGTH,
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*
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* ATHROW,
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*
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* MONITORENTER, or MONITOREXIT.
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*/
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void visitInsn (int opcode);
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/**
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* Visits an instruction with a single int operand.
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*
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* @param opcode the opcode of the instruction to be visited. This opcode is
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* either BIPUSH, SIPUSH or NEWARRAY.
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* @param operand the operand of the instruction to be visited.
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*/
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void visitIntInsn (int opcode, int operand);
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/**
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* Visits a local variable instruction. A local variable instruction is an
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* instruction that loads or stores the value of a local variable.
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*
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* @param opcode the opcode of the local variable instruction to be visited.
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* This opcode is either ILOAD, LLOAD, FLOAD, DLOAD, ALOAD, ISTORE,
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* LSTORE, FSTORE, DSTORE, ASTORE or RET.
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* @param var the operand of the instruction to be visited. This operand is
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* the index of a local variable.
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*/
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void visitVarInsn (int opcode, int var);
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/**
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* Visits a type instruction. A type instruction is an instruction that
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* takes a type descriptor as parameter.
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*
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* @param opcode the opcode of the type instruction to be visited. This opcode
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* is either NEW, ANEWARRAY, CHECKCAST or INSTANCEOF.
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* @param desc the operand of the instruction to be visited. This operand is
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* must be a fully qualified class name in internal form, or the type
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* descriptor of an array type (see {@link Type Type}).
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*/
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void visitTypeInsn (int opcode, String desc);
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/**
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* Visits a field instruction. A field instruction is an instruction that
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* loads or stores the value of a field of an object.
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*
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* @param opcode the opcode of the type instruction to be visited. This opcode
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* is either GETSTATIC, PUTSTATIC, GETFIELD or PUTFIELD.
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* @param owner the internal name of the field's owner class (see {@link
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* Type#getInternalName getInternalName}).
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* @param name the field's name.
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* @param desc the field's descriptor (see {@link Type Type}).
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*/
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void visitFieldInsn (int opcode, String owner, String name, String desc);
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/**
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* Visits a method instruction. A method instruction is an instruction that
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* invokes a method.
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*
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* @param opcode the opcode of the type instruction to be visited. This opcode
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* is either INVOKEVIRTUAL, INVOKESPECIAL, INVOKESTATIC or
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* INVOKEINTERFACE.
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* @param owner the internal name of the method's owner class (see {@link
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* Type#getInternalName getInternalName}).
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* @param name the method's name.
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* @param desc the method's descriptor (see {@link Type Type}).
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*/
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void visitMethodInsn (int opcode, String owner, String name, String desc);
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/**
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* Visits a jump instruction. A jump instruction is an instruction that may
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* jump to another instruction.
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*
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* @param opcode the opcode of the type instruction to be visited. This opcode
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* is either IFEQ, IFNE, IFLT, IFGE, IFGT, IFLE, IF_ICMPEQ, IF_ICMPNE,
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* IF_ICMPLT, IF_ICMPGE, IF_ICMPGT, IF_ICMPLE, IF_ACMPEQ, IF_ACMPNE,
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* GOTO, JSR, IFNULL or IFNONNULL.
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* @param label the operand of the instruction to be visited. This operand is
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* a label that designates the instruction to which the jump instruction
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* may jump.
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*/
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void visitJumpInsn (int opcode, Label label);
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/**
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* Visits a label. A label designates the instruction that will be visited
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* just after it.
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*
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* @param label a {@link Label Label} object.
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*/
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void visitLabel (Label label);
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// -------------------------------------------------------------------------
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// Special instructions
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// -------------------------------------------------------------------------
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/**
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* Visits a LDC instruction.
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*
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* @param cst the constant to be loaded on the stack. This parameter must be
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* a non null {@link java.lang.Integer Integer}, a {@link java.lang.Float
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* Float}, a {@link java.lang.Long Long}, a {@link java.lang.Double
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* Double} or a {@link String String}.
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*/
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void visitLdcInsn (Object cst);
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/**
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* Visits an IINC instruction.
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*
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* @param var index of the local variable to be incremented.
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* @param increment amount to increment the local variable by.
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*/
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void visitIincInsn (int var, int increment);
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/**
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* Visits a TABLESWITCH instruction.
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*
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* @param min the minimum key value.
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* @param max the maximum key value.
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* @param dflt beginning of the default handler block.
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* @param labels beginnings of the handler blocks. <tt>labels[i]</tt> is the
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* beginning of the handler block for the <tt>min + i</tt> key.
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*/
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void visitTableSwitchInsn (int min, int max, Label dflt, Label labels[]);
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/**
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* Visits a LOOKUPSWITCH instruction.
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*
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* @param dflt beginning of the default handler block.
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* @param keys the values of the keys.
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* @param labels beginnings of the handler blocks. <tt>labels[i]</tt> is the
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* beginning of the handler block for the <tt>keys[i]</tt> key.
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*/
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void visitLookupSwitchInsn (Label dflt, int keys[], Label labels[]);
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/**
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* Visits a MULTIANEWARRAY instruction.
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*
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* @param desc an array type descriptor (see {@link Type Type}).
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* @param dims number of dimensions of the array to allocate.
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*/
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void visitMultiANewArrayInsn (String desc, int dims);
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// -------------------------------------------------------------------------
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// Exceptions table entries, max stack size and max locals
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// -------------------------------------------------------------------------
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/**
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* Visits a try catch block.
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*
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* @param start beginning of the exception handler's scope (inclusive).
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* @param end end of the exception handler's scope (exclusive).
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* @param handler beginning of the exception handler's code.
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* @param type internal name of the type of exceptions handled by the handler,
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* or <tt>null</tt> to catch any exceptions (for "finally" blocks).
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* @throws IllegalArgumentException if one of the labels has not already been
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* visited by this visitor (by the {@link #visitLabel visitLabel}
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* method).
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*/
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void visitTryCatchBlock (Label start, Label end, Label handler, String type);
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/**
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* Visits the maximum stack size and the maximum number of local variables of
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* the method.
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*
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* @param maxStack maximum stack size of the method.
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* @param maxLocals maximum number of local variables for the method.
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*/
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void visitMaxs (int maxStack, int maxLocals);
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// -------------------------------------------------------------------------
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// Debug information
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// -------------------------------------------------------------------------
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/**
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* Visits a local variable declaration.
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*
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* @param name the name of a local variable.
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* @param desc the type descriptor of this local variable.
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* @param start the first instruction corresponding to the scope of this
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* local variable (inclusive).
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* @param end the last instruction corresponding to the scope of this
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* local variable (exclusive).
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* @param index the local variable's index.
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* @throws IllegalArgumentException if one of the labels has not already been
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* visited by this visitor (by the {@link #visitLabel visitLabel}
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* method).
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*/
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void visitLocalVariable (
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String name,
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String desc,
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Label start,
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Label end,
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int index);
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/**
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* Visits a line number declaration.
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*
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* @param line a line number. This number refers to the source file
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* from which the class was compiled.
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* @param start the first instruction corresponding to this line number.
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* @throws IllegalArgumentException if <tt>start</tt> has not already been
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* visited by this visitor (by the {@link #visitLabel visitLabel}
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* method).
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*/
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void visitLineNumber (int line, Label start);
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// -------------------------------------------------------------------------
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// Non standard attributes
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// -------------------------------------------------------------------------
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/**
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* Visits a non standard attribute of the code. This method must visit only
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* the first attribute in the given attribute list.
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*
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* @param attr a non standard code attribute. Must not be <tt>null</tt>.
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*/
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void visitAttribute (Attribute attr);
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}
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