com.caucho.bytecode
Class CodeVisitor

java.lang.Object
  extended by com.caucho.bytecode.CodeVisitor
Direct Known Subclasses:
CodeEnhancer

public class CodeVisitor
extends java.lang.Object

Visitor for travelling the code.


Field Summary
protected  CodeAttribute _codeAttr
           
protected  int _offset
           
static int AALOAD
           
static int AASTORE
           
static int ACONST_NULL
           
static int ALOAD
           
static int ALOAD_0
           
static int ALOAD_1
           
static int ALOAD_2
           
static int ALOAD_3
           
static int ANEWARRAY
           
static int ARETURN
           
static int ARRAYLENGTH
           
static int ASTORE
           
static int ASTORE_0
           
static int ASTORE_1
           
static int ASTORE_2
           
static int ASTORE_3
           
static int ATHROW
           
static int BALOAD
           
static int BASTORE
           
static int BIPUSH
           
static int CALOAD
           
static int CASTORE
           
static int CHECKCAST
           
static int D2F
           
static int D2I
           
static int D2L
           
static int DADD
           
static int DALOAD
           
static int DASTORE
           
static int DCMPG
           
static int DCMPL
           
static int DCONST_0
           
static int DCONST_1
           
static int DDIV
           
static int DLOAD
           
static int DLOAD_0
           
static int DLOAD_1
           
static int DLOAD_2
           
static int DLOAD_3
           
static int DMUL
           
static int DNEG
           
static int DREM
           
static int DRETURN
           
static int DSTORE
           
static int DSTORE_0
           
static int DSTORE_1
           
static int DSTORE_2
           
static int DSTORE_3
           
static int DSUB
           
static int DUP
           
static int DUP_X1
           
static int DUP_X2
           
static int DUP2
           
static int DUP2_X1
           
static int DUP2_X2
           
static int F2D
           
static int F2I
           
static int F2L
           
static int FADD
           
static int FALOAD
           
static int FASTORE
           
static int FCMPG
           
static int FCMPL
           
static int FCONST_0
           
static int FCONST_1
           
static int FCONST_2
           
static int FDIV
           
static int FLOAD
           
static int FLOAD_0
           
static int FLOAD_1
           
static int FLOAD_2
           
static int FLOAD_3
           
static int FMUL
           
static int FNEG
           
static int FREM
           
static int FRETURN
           
static int FSTORE
           
static int FSTORE_0
           
static int FSTORE_1
           
static int FSTORE_2
           
static int FSTORE_3
           
static int FSUB
           
static int GETFIELD
           
static int GETSTATIC
           
static int GOTO
           
static int GOTO_W
           
static int I2B
           
static int I2C
           
static int I2D
           
static int I2F
           
static int I2L
           
static int I2S
           
static int IADD
           
static int IALOAD
           
static int IAND
           
static int IASTORE
           
static int ICONST_0
           
static int ICONST_1
           
static int ICONST_2
           
static int ICONST_3
           
static int ICONST_4
           
static int ICONST_5
           
static int ICONST_M1
           
static int IDIV
           
static int IF_ACMPEQ
           
static int IF_ACMPNE
           
static int IF_ICMPEQ
           
static int IF_ICMPGE
           
static int IF_ICMPGT
           
static int IF_ICMPLE
           
static int IF_ICMPLT
           
static int IF_ICMPNE
           
static int IFEQ
           
static int IFGE
           
static int IFGT
           
static int IFLE
           
static int IFLT
           
static int IFNE
           
static int IFNONNULL
           
static int IFNULL
           
static int IINC
           
static int ILOAD
           
static int ILOAD_0
           
static int ILOAD_1
           
static int ILOAD_2
           
static int ILOAD_3
           
static int IMUL
           
static int INEG
           
static int INSTANCEOF
           
static int INVOKEINTERFACE
           
static int INVOKESPECIAL
           
static int INVOKESTATIC
           
static int INVOKEVIRTUAL
           
static int IOR
           
static int IREM
           
static int IRETURN
           
static int ISHL
           
static int ISHR
           
static int ISTORE
           
static int ISTORE_0
           
static int ISTORE_1
           
static int ISTORE_2
           
static int ISTORE_3
           
static int ISUB
           
static int IUSHR
           
static int IXOR
           
static int JSR
           
static int JSR_W
           
static int L2D
           
static int L2F
           
static int L2I
           
static int LADD
           
static int LALOAD
           
static int LAND
           
static int LASTORE
           
static int LCMP
           
static int LCONST_0
           
static int LCONST_1
           
static int LDC
           
static int LDC_W
           
static int LDC2_W
           
static int LDIV
           
static int LLOAD
           
static int LLOAD_0
           
static int LLOAD_1
           
static int LLOAD_2
           
static int LLOAD_3
           
static int LMUL
           
static int LNEG
           
static int LOOKUPSWITCH
           
static int LOR
           
static int LREM
           
static int LRETURN
           
static int LSHL
           
static int LSHR
           
static int LSTORE
           
static int LSTORE_0
           
static int LSTORE_1
           
static int LSTORE_2
           
static int LSTORE_3
           
static int LSUB
           
static int LUSHR
           
static int LXOR
           
static int MONITORENTER
           
static int MONITOREXIT
           
static int MULTIANEWARRAY
           
static int NEW
           
static int NEWARRAY
           
static int NOP
           
static int POP
           
static int POP2
           
static int PUTFIELD
           
static int PUTSTATIC
           
static int RESERVED_0
           
static int RET
           
static int RETURN
           
static int SALOAD
           
static int SASTORE
           
static int SIPUSH
           
static int SWAP
           
static int TABLESWITCH
           
static int WIDE
           
 
Constructor Summary
CodeVisitor()
           
CodeVisitor(JavaClass javaClass, CodeAttribute codeAttr)
           
 
Method Summary
 void analyze(Analyzer analyzer)
          Analyzes the code for a method
 void analyze(Analyzer analyzer, boolean allowFlow)
          Analyzes the code for a method
protected  void analyzeImpl(Analyzer analyzer, boolean allowFlow, IntArray pendingTargets, IntArray completedTargets)
          Analyzes the code for a method
 int getBranchTarget()
          Returns the branch target.
 int getByte(int offset)
          Reads a byte value.
 int getByteArg()
          Reads a byte argument.
 int getByteArg(int offset)
          Gets a byte arg
 byte[] getCode()
          Returns the code buffer.
 CodeAttribute getCodeAttribute()
          Returns the code attribute.
 ConstantPoolEntry getConstantArg()
          Returns a constant pool item.
 java.util.ArrayList<CodeAttribute.ExceptionItem> getExceptions()
          Returns the exceptions.
 int getInt(int offset)
          Reads an int argument.
 int getIntArg()
          Reads an integer.
 JavaClass getJavaClass()
          Returns the java class.
 int getOffset()
          Returns the offset.
 int getOpcode()
          Returns the opcode at the cursor.
 int getShort(int offset)
          Reads a short value.
 int getShortArg()
          Reads a short argument.
 int getShortArg(int offset)
          Sets a short value.
 int[] getSwitchTargets()
          Returns the branch target.
 void init(JavaClass javaClass, CodeAttribute codeAttr)
           
 boolean isBranch()
          Returns true for a simple branch, i.e.
 boolean isSwitch()
          Returns true for a switch.
 boolean next()
          Goes to the next opcode.
protected  int nextOffset()
          Goes to the next opcode.
 void setByteArg(int offset, int value)
          Sets a byte value.
 void setInt(int offset, int value)
          Sets a short value.
 void setOffset(int offset)
          Sets the offset.
 void setShort(int offset, int value)
          Sets a short value.
 void setShortArg(int offset, int value)
          Sets a short value.
 
Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait
 

Field Detail

_codeAttr

protected CodeAttribute _codeAttr

_offset

protected int _offset

NOP

public static final int NOP
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Constant Field Values

ACONST_NULL

public static final int ACONST_NULL
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ICONST_M1

public static final int ICONST_M1
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ICONST_0

public static final int ICONST_0
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ICONST_1

public static final int ICONST_1
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ICONST_2

public static final int ICONST_2
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ICONST_3

public static final int ICONST_3
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ICONST_4

public static final int ICONST_4
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ICONST_5

public static final int ICONST_5
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LCONST_0

public static final int LCONST_0
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LCONST_1

public static final int LCONST_1
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FCONST_0

public static final int FCONST_0
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FCONST_1

public static final int FCONST_1
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FCONST_2

public static final int FCONST_2
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DCONST_0

public static final int DCONST_0
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DCONST_1

public static final int DCONST_1
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BIPUSH

public static final int BIPUSH
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SIPUSH

public static final int SIPUSH
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LDC

public static final int LDC
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LDC_W

public static final int LDC_W
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LDC2_W

public static final int LDC2_W
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ILOAD

public static final int ILOAD
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LLOAD

public static final int LLOAD
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FLOAD

public static final int FLOAD
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DLOAD

public static final int DLOAD
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ALOAD

public static final int ALOAD
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ILOAD_0

public static final int ILOAD_0
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ILOAD_1

public static final int ILOAD_1
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ILOAD_2

public static final int ILOAD_2
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ILOAD_3

public static final int ILOAD_3
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LLOAD_0

public static final int LLOAD_0
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LLOAD_1

public static final int LLOAD_1
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LLOAD_2

public static final int LLOAD_2
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LLOAD_3

public static final int LLOAD_3
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FLOAD_0

public static final int FLOAD_0
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FLOAD_1

public static final int FLOAD_1
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FLOAD_2

public static final int FLOAD_2
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FLOAD_3

public static final int FLOAD_3
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DLOAD_0

public static final int DLOAD_0
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DLOAD_1

public static final int DLOAD_1
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DLOAD_2

public static final int DLOAD_2
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DLOAD_3

public static final int DLOAD_3
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ALOAD_0

public static final int ALOAD_0
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ALOAD_1

public static final int ALOAD_1
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ALOAD_2

public static final int ALOAD_2
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ALOAD_3

public static final int ALOAD_3
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IALOAD

public static final int IALOAD
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LALOAD

public static final int LALOAD
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FALOAD

public static final int FALOAD
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DALOAD

public static final int DALOAD
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AALOAD

public static final int AALOAD
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BALOAD

public static final int BALOAD
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CALOAD

public static final int CALOAD
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SALOAD

public static final int SALOAD
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ISTORE

public static final int ISTORE
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LSTORE

public static final int LSTORE
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FSTORE

public static final int FSTORE
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DSTORE

public static final int DSTORE
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ASTORE

public static final int ASTORE
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ISTORE_0

public static final int ISTORE_0
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ISTORE_1

public static final int ISTORE_1
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ISTORE_2

public static final int ISTORE_2
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ISTORE_3

public static final int ISTORE_3
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LSTORE_0

public static final int LSTORE_0
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LSTORE_1

public static final int LSTORE_1
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LSTORE_2

public static final int LSTORE_2
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LSTORE_3

public static final int LSTORE_3
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FSTORE_0

public static final int FSTORE_0
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FSTORE_1

public static final int FSTORE_1
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FSTORE_2

public static final int FSTORE_2
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FSTORE_3

public static final int FSTORE_3
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DSTORE_0

public static final int DSTORE_0
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DSTORE_1

public static final int DSTORE_1
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DSTORE_2

public static final int DSTORE_2
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DSTORE_3

public static final int DSTORE_3
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ASTORE_0

public static final int ASTORE_0
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ASTORE_1

public static final int ASTORE_1
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ASTORE_2

public static final int ASTORE_2
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ASTORE_3

public static final int ASTORE_3
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IASTORE

public static final int IASTORE
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LASTORE

public static final int LASTORE
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FASTORE

public static final int FASTORE
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DASTORE

public static final int DASTORE
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AASTORE

public static final int AASTORE
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BASTORE

public static final int BASTORE
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CASTORE

public static final int CASTORE
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SASTORE

public static final int SASTORE
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POP

public static final int POP
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POP2

public static final int POP2
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DUP

public static final int DUP
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DUP_X1

public static final int DUP_X1
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DUP_X2

public static final int DUP_X2
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DUP2

public static final int DUP2
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DUP2_X1

public static final int DUP2_X1
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DUP2_X2

public static final int DUP2_X2
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SWAP

public static final int SWAP
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IADD

public static final int IADD
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LADD

public static final int LADD
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FADD

public static final int FADD
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DADD

public static final int DADD
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ISUB

public static final int ISUB
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LSUB

public static final int LSUB
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FSUB

public static final int FSUB
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DSUB

public static final int DSUB
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IMUL

public static final int IMUL
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LMUL

public static final int LMUL
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FMUL

public static final int FMUL
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DMUL

public static final int DMUL
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IDIV

public static final int IDIV
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LDIV

public static final int LDIV
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FDIV

public static final int FDIV
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DDIV

public static final int DDIV
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IREM

public static final int IREM
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LREM

public static final int LREM
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FREM

public static final int FREM
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DREM

public static final int DREM
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INEG

public static final int INEG
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LNEG

public static final int LNEG
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FNEG

public static final int FNEG
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DNEG

public static final int DNEG
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ISHL

public static final int ISHL
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LSHL

public static final int LSHL
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ISHR

public static final int ISHR
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LSHR

public static final int LSHR
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IUSHR

public static final int IUSHR
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LUSHR

public static final int LUSHR
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IAND

public static final int IAND
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LAND

public static final int LAND
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IOR

public static final int IOR
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LOR

public static final int LOR
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IXOR

public static final int IXOR
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LXOR

public static final int LXOR
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IINC

public static final int IINC
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I2L

public static final int I2L
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I2F

public static final int I2F
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I2D

public static final int I2D
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L2I

public static final int L2I
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L2F

public static final int L2F
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L2D

public static final int L2D
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F2I

public static final int F2I
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F2L

public static final int F2L
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F2D

public static final int F2D
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D2I

public static final int D2I
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D2L

public static final int D2L
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D2F

public static final int D2F
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I2B

public static final int I2B
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I2C

public static final int I2C
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I2S

public static final int I2S
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LCMP

public static final int LCMP
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FCMPL

public static final int FCMPL
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FCMPG

public static final int FCMPG
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DCMPL

public static final int DCMPL
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DCMPG

public static final int DCMPG
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IFEQ

public static final int IFEQ
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IFNE

public static final int IFNE
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IFLT

public static final int IFLT
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IFGE

public static final int IFGE
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IFGT

public static final int IFGT
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IFLE

public static final int IFLE
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IF_ICMPEQ

public static final int IF_ICMPEQ
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IF_ICMPNE

public static final int IF_ICMPNE
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IF_ICMPLT

public static final int IF_ICMPLT
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IF_ICMPGE

public static final int IF_ICMPGE
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IF_ICMPGT

public static final int IF_ICMPGT
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IF_ICMPLE

public static final int IF_ICMPLE
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IF_ACMPEQ

public static final int IF_ACMPEQ
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IF_ACMPNE

public static final int IF_ACMPNE
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GOTO

public static final int GOTO
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JSR

public static final int JSR
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RET

public static final int RET
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TABLESWITCH

public static final int TABLESWITCH
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LOOKUPSWITCH

public static final int LOOKUPSWITCH
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IRETURN

public static final int IRETURN
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LRETURN

public static final int LRETURN
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FRETURN

public static final int FRETURN
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DRETURN

public static final int DRETURN
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ARETURN

public static final int ARETURN
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RETURN

public static final int RETURN
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GETSTATIC

public static final int GETSTATIC
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PUTSTATIC

public static final int PUTSTATIC
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GETFIELD

public static final int GETFIELD
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PUTFIELD

public static final int PUTFIELD
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INVOKEVIRTUAL

public static final int INVOKEVIRTUAL
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INVOKESPECIAL

public static final int INVOKESPECIAL
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INVOKESTATIC

public static final int INVOKESTATIC
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INVOKEINTERFACE

public static final int INVOKEINTERFACE
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RESERVED_0

public static final int RESERVED_0
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NEW

public static final int NEW
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NEWARRAY

public static final int NEWARRAY
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ANEWARRAY

public static final int ANEWARRAY
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ARRAYLENGTH

public static final int ARRAYLENGTH
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ATHROW

public static final int ATHROW
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CHECKCAST

public static final int CHECKCAST
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INSTANCEOF

public static final int INSTANCEOF
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MONITORENTER

public static final int MONITORENTER
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MONITOREXIT

public static final int MONITOREXIT
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WIDE

public static final int WIDE
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MULTIANEWARRAY

public static final int MULTIANEWARRAY
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IFNULL

public static final int IFNULL
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IFNONNULL

public static final int IFNONNULL
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GOTO_W

public static final int GOTO_W
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JSR_W

public static final int JSR_W
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Constant Field Values
Constructor Detail

CodeVisitor

public CodeVisitor()

CodeVisitor

public CodeVisitor(JavaClass javaClass,
                   CodeAttribute codeAttr)
Method Detail

init

public void init(JavaClass javaClass,
                 CodeAttribute codeAttr)

getJavaClass

public JavaClass getJavaClass()
Returns the java class.


getCodeAttribute

public CodeAttribute getCodeAttribute()
Returns the code attribute.


getOffset

public int getOffset()
Returns the offset.


setOffset

public void setOffset(int offset)
Sets the offset.


getCode

public byte[] getCode()
Returns the code buffer.


getExceptions

public java.util.ArrayList<CodeAttribute.ExceptionItem> getExceptions()
Returns the exceptions.


getOpcode

public int getOpcode()
Returns the opcode at the cursor.


next

public boolean next()
Goes to the next opcode.


nextOffset

protected int nextOffset()
Goes to the next opcode.


isBranch

public boolean isBranch()
Returns true for a simple branch, i.e. a branch with a simple target.


getBranchTarget

public int getBranchTarget()
Returns the branch target.


isSwitch

public boolean isSwitch()
Returns true for a switch.


getSwitchTargets

public int[] getSwitchTargets()
Returns the branch target.


getConstantArg

public ConstantPoolEntry getConstantArg()
Returns a constant pool item.


getByteArg

public int getByteArg()
Reads a byte argument.


getByteArg

public int getByteArg(int offset)
Gets a byte arg


setByteArg

public void setByteArg(int offset,
                       int value)
Sets a byte value.


getShortArg

public int getShortArg()
Reads a short argument.


getShortArg

public int getShortArg(int offset)
Sets a short value.


setShortArg

public void setShortArg(int offset,
                        int value)
Sets a short value.


setShort

public void setShort(int offset,
                     int value)
Sets a short value.


getIntArg

public int getIntArg()
Reads an integer.


setInt

public void setInt(int offset,
                   int value)
Sets a short value.


getByte

public int getByte(int offset)
Reads a byte value.


getShort

public int getShort(int offset)
Reads a short value.


getInt

public int getInt(int offset)
Reads an int argument.


analyze

public void analyze(Analyzer analyzer)
             throws java.lang.Exception
Analyzes the code for a method

Throws:
java.lang.Exception

analyze

public void analyze(Analyzer analyzer,
                    boolean allowFlow)
             throws java.lang.Exception
Analyzes the code for a method

Throws:
java.lang.Exception

analyzeImpl

protected void analyzeImpl(Analyzer analyzer,
                           boolean allowFlow,
                           IntArray pendingTargets,
                           IntArray completedTargets)
                    throws java.lang.Exception
Analyzes the code for a method

Throws:
java.lang.Exception