javassist.bytecode.stackmap

Class Tracer

java.lang.Object

javassist.bytecode.stackmap.Tracer

All Implemented Interfaces:

TypeTag

Direct Known Subclasses:

MapMaker

public abstract class Tracer
extends java.lang.Object
implements TypeTag

Field Summary

Fields

Modifier and Type	Field and Description
protected ClassPool	classPool
protected ConstPool	cpool
protected TypeData[]	localsTypes
protected java.lang.String	returnType
protected int	stackTop
protected TypeData[]	stackTypes

Fields inherited from interface javassist.bytecode.stackmap.TypeTag

DOUBLE, FLOAT, INTEGER, LONG, TOP, TOP_TYPE

Constructor Summary

Constructors

Constructor and Description
Tracer(ClassPool classes, ConstPool cp, int maxStack, int maxLocals, java.lang.String retType)
Tracer(Tracer t)

Method Summary

Modifier and Type	Method and Description
private void	checkParamTypes(java.lang.String desc, int i)
private void	constructorCalled(TypeData target, int offset)
private int	doALOAD(int localVar)
private int	doASTORE(int index)
private void	doDUP_XX(int delta, int len)
private int	doGetField(int pos, byte[] code, boolean notStatic)
private int	doInvokeDynamic(int pos, byte[] code)
private int	doInvokeIntfMethod(int pos, byte[] code)
private int	doInvokeMethod(int pos, byte[] code, boolean notStatic)
private void	doLDC(int index)
private int	doMultiANewArray(int pos, byte[] code)
private int	doNEWARRAY(int pos, byte[] code)
protected int	doOpcode(int pos, byte[] code) Does abstract interpretation on the given bytecode instruction.
private int	doOpcode0_53(int pos, byte[] code, int op)
private int	doOpcode148_201(int pos, byte[] code, int op)
private int	doOpcode54_95(int pos, byte[] code, int op)
private int	doOpcode96_147(int pos, byte[] code, int op)
private int	doPutField(int pos, byte[] code, boolean notStatic)
private void	doWIDE_STORE(int pos, byte[] code, TypeData type)
private void	doWIDE_XLOAD(int pos, byte[] code, TypeData type)
private int	doWIDE(int pos, byte[] code)
private int	doXLOAD(int localVar, TypeData type)
private int	doXLOAD(TypeData type, byte[] code, int pos)
private int	doXSTORE(int pos, byte[] code, TypeData type)
private int	doXSTORE(int index, TypeData type)
private static java.lang.String	getFieldClassName(java.lang.String desc, int index)
private void	pushMemberType(java.lang.String descriptor)
private void	setFieldTarget(boolean notStatic, int index)
protected void	visitBranch(int pos, byte[] code, int offset)
protected void	visitGoto(int pos, byte[] code, int offset)
protected void	visitJSR(int pos, byte[] code) Invoked when the visited instruction is jsr.
protected void	visitLookupSwitch(int pos, byte[] code, int n, int pairsPos, int defaultOffset)
protected void	visitRET(int pos, byte[] code) Invoked when the visited instruction is ret or wide ret.
protected void	visitReturn(int pos, byte[] code)
protected void	visitTableSwitch(int pos, byte[] code, int n, int offsetPos, int defaultOffset)
protected void	visitThrow(int pos, byte[] code)

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

classPool

protected ClassPool classPool

cpool

protected ConstPool cpool

returnType

protected java.lang.String returnType

stackTop

protected int stackTop

stackTypes

protected TypeData[] stackTypes

localsTypes

protected TypeData[] localsTypes

Constructor Detail

Tracer

public Tracer(ClassPool classes,
              ConstPool cp,
              int maxStack,
              int maxLocals,
              java.lang.String retType)

Tracer

public Tracer(Tracer t)

Method Detail

doOpcode

protected int doOpcode(int pos,
                       byte[] code)
                throws BadBytecode

Does abstract interpretation on the given bytecode instruction. It records whether or not a local variable (i.e. register) is accessed. If the instruction requires that a local variable or a stack element has a more specific type, this method updates the type of it.

Parameters:

pos - the position of the instruction.

Returns:

the size of the instruction at POS.

Throws:

BadBytecode

visitBranch

protected void visitBranch(int pos,
                           byte[] code,
                           int offset)
                    throws BadBytecode

Throws:

BadBytecode

visitGoto

protected void visitGoto(int pos,
                         byte[] code,
                         int offset)
                  throws BadBytecode

Throws:

BadBytecode

visitReturn

protected void visitReturn(int pos,
                           byte[] code)
                    throws BadBytecode

Throws:

BadBytecode

visitThrow

protected void visitThrow(int pos,
                          byte[] code)
                   throws BadBytecode

Throws:

BadBytecode

visitTableSwitch

protected void visitTableSwitch(int pos,
                                byte[] code,
                                int n,
                                int offsetPos,
                                int defaultOffset)
                         throws BadBytecode

Parameters:

pos - the position of TABLESWITCH

code - bytecode

n - the number of case labels

offsetPos - the position of the branch-target table.

defaultOffset - the offset to the default branch target.

Throws:

BadBytecode

visitLookupSwitch

protected void visitLookupSwitch(int pos,
                                 byte[] code,
                                 int n,
                                 int pairsPos,
                                 int defaultOffset)
                          throws BadBytecode

Parameters:

pos - the position of LOOKUPSWITCH

code - bytecode

n - the number of case labels

offsetPos - the position of the table of pairs of a value and a branch target.

defaultOffset - the offset to the default branch target.

Throws:

BadBytecode

visitJSR

protected void visitJSR(int pos,
                        byte[] code)
                 throws BadBytecode

Invoked when the visited instruction is jsr. Java6 or later does not allow using RET.

Throws:

BadBytecode

visitRET

protected void visitRET(int pos,
                        byte[] code)
                 throws BadBytecode

Invoked when the visited instruction is ret or wide ret. Java6 or later does not allow using RET.

Throws:

BadBytecode

doOpcode0_53

private int doOpcode0_53(int pos,
                         byte[] code,
                         int op)
                  throws BadBytecode

Throws:

BadBytecode

doLDC

private void doLDC(int index)

doXLOAD

private int doXLOAD(TypeData type,
                    byte[] code,
                    int pos)

doXLOAD

private int doXLOAD(int localVar,
                    TypeData type)

doALOAD

private int doALOAD(int localVar)

doOpcode54_95

private int doOpcode54_95(int pos,
                          byte[] code,
                          int op)
                   throws BadBytecode

Throws:

BadBytecode

doXSTORE

private int doXSTORE(int pos,
                     byte[] code,
                     TypeData type)

doXSTORE

private int doXSTORE(int index,
                     TypeData type)

doASTORE

private int doASTORE(int index)

doDUP_XX

private void doDUP_XX(int delta,
                      int len)

doOpcode96_147

private int doOpcode96_147(int pos,
                           byte[] code,
                           int op)

doOpcode148_201

private int doOpcode148_201(int pos,
                            byte[] code,
                            int op)
                     throws BadBytecode

Throws:

BadBytecode

doWIDE

private int doWIDE(int pos,
                   byte[] code)
            throws BadBytecode

Throws:

BadBytecode

doWIDE_XLOAD

private void doWIDE_XLOAD(int pos,
                          byte[] code,
                          TypeData type)

doWIDE_STORE

private void doWIDE_STORE(int pos,
                          byte[] code,
                          TypeData type)

doPutField

private int doPutField(int pos,
                       byte[] code,
                       boolean notStatic)
                throws BadBytecode

Throws:

BadBytecode

doGetField

private int doGetField(int pos,
                       byte[] code,
                       boolean notStatic)
                throws BadBytecode

Throws:

BadBytecode

setFieldTarget

private void setFieldTarget(boolean notStatic,
                            int index)
                     throws BadBytecode

Throws:

BadBytecode

doNEWARRAY

private int doNEWARRAY(int pos,
                       byte[] code)

doMultiANewArray

private int doMultiANewArray(int pos,
                             byte[] code)

doInvokeMethod

private int doInvokeMethod(int pos,
                           byte[] code,
                           boolean notStatic)
                    throws BadBytecode

Throws:

BadBytecode

constructorCalled

private void constructorCalled(TypeData target,
                               int offset)

doInvokeIntfMethod

private int doInvokeIntfMethod(int pos,
                               byte[] code)
                        throws BadBytecode

Throws:

BadBytecode

doInvokeDynamic

private int doInvokeDynamic(int pos,
                            byte[] code)
                     throws BadBytecode

Throws:

BadBytecode

pushMemberType

private void pushMemberType(java.lang.String descriptor)

getFieldClassName

private static java.lang.String getFieldClassName(java.lang.String desc,
                                                  int index)

checkParamTypes

private void checkParamTypes(java.lang.String desc,
                             int i)
                      throws BadBytecode

Throws:

BadBytecode