Package javassist.bytecode.analysis

Class Executor

java.lang.Object

javassist.bytecode.analysis.Executor

All Implemented Interfaces:

Opcode

public class Executor
extends Object
implements Opcode

Executor is responsible for modeling the effects of a JVM instruction on a frame.

Field Summary

Fields

Modifier and Type	Field	Description
private final Type	CLASS_TYPE
private final ClassPool	classPool
private final ConstPool	constPool
private int	lastPos
private final Type	STRING_TYPE
private final Type	THROWABLE_TYPE

Fields inherited from interface javassist.bytecode.Opcode

AALOAD, AASTORE, ACONST_NULL, ALOAD, ALOAD_0, ALOAD_1, ALOAD_2, ALOAD_3, ANEWARRAY, ARETURN, ARRAYLENGTH, ASTORE, ASTORE_0, ASTORE_1, ASTORE_2, ASTORE_3, ATHROW, BALOAD, BASTORE, BIPUSH, CALOAD, CASTORE, CHECKCAST, D2F, D2I, D2L, DADD, DALOAD, DASTORE, DCMPG, DCMPL, DCONST_0, DCONST_1, DDIV, DLOAD, DLOAD_0, DLOAD_1, DLOAD_2, DLOAD_3, DMUL, DNEG, DREM, DRETURN, DSTORE, DSTORE_0, DSTORE_1, DSTORE_2, DSTORE_3, DSUB, DUP, DUP_X1, DUP_X2, DUP2, DUP2_X1, DUP2_X2, F2D, F2I, F2L, FADD, FALOAD, FASTORE, FCMPG, FCMPL, FCONST_0, FCONST_1, FCONST_2, FDIV, FLOAD, FLOAD_0, FLOAD_1, FLOAD_2, FLOAD_3, FMUL, FNEG, FREM, FRETURN, FSTORE, FSTORE_0, FSTORE_1, FSTORE_2, FSTORE_3, FSUB, GETFIELD, GETSTATIC, GOTO, GOTO_W, I2B, I2C, I2D, I2F, I2L, I2S, IADD, IALOAD, IAND, IASTORE, ICONST_0, ICONST_1, ICONST_2, ICONST_3, ICONST_4, ICONST_5, ICONST_M1, IDIV, IF_ACMPEQ, IF_ACMPNE, IF_ICMPEQ, IF_ICMPGE, IF_ICMPGT, IF_ICMPLE, IF_ICMPLT, IF_ICMPNE, IFEQ, IFGE, IFGT, IFLE, IFLT, IFNE, IFNONNULL, IFNULL, IINC, ILOAD, ILOAD_0, ILOAD_1, ILOAD_2, ILOAD_3, IMUL, INEG, INSTANCEOF, INVOKEDYNAMIC, INVOKEINTERFACE, INVOKESPECIAL, INVOKESTATIC, INVOKEVIRTUAL, IOR, IREM, IRETURN, ISHL, ISHR, ISTORE, ISTORE_0, ISTORE_1, ISTORE_2, ISTORE_3, ISUB, IUSHR, IXOR, JSR, JSR_W, L2D, L2F, L2I, LADD, LALOAD, LAND, LASTORE, LCMP, LCONST_0, LCONST_1, LDC, LDC_W, LDC2_W, LDIV, LLOAD, LLOAD_0, LLOAD_1, LLOAD_2, LLOAD_3, LMUL, LNEG, LOOKUPSWITCH, LOR, LREM, LRETURN, LSHL, LSHR, LSTORE, LSTORE_0, LSTORE_1, LSTORE_2, LSTORE_3, LSUB, LUSHR, LXOR, MONITORENTER, MONITOREXIT, MULTIANEWARRAY, NEW, NEWARRAY, NOP, POP, POP2, PUTFIELD, PUTSTATIC, RET, RETURN, SALOAD, SASTORE, SIPUSH, STACK_GROW, SWAP, T_BOOLEAN, T_BYTE, T_CHAR, T_DOUBLE, T_FLOAT, T_INT, T_LONG, T_SHORT, TABLESWITCH, WIDE

Constructor Summary

Constructors

Constructor	Description
Executor(ClassPool classPool, ConstPool constPool)

Method Summary

Modifier and Type	Method	Description
private void	access(int index, Type type, Subroutine subroutine)
private void	evalArrayLoad(Type expectedComponent, Frame frame)
private void	evalArrayStore(Type expectedComponent, Frame frame)
private void	evalBinaryMath(Type expected, Frame frame)
private void	evalGetField(int opcode, int index, Frame frame)
private void	evalInvokeDynamic(int opcode, int index, Frame frame)
private void	evalInvokeIntfMethod(int opcode, int index, Frame frame)
private void	evalInvokeMethod(int opcode, int index, Frame frame)
private void	evalLDC(int index, Frame frame)
private void	evalLoad(Type expected, int index, Frame frame, Subroutine subroutine)
private void	evalNewArray(int pos, CodeIterator iter, Frame frame)
private void	evalNewObjectArray(int pos, CodeIterator iter, Frame frame)
private void	evalPutField(int opcode, int index, Frame frame)
private void	evalShift(Type expected, Frame frame)
private void	evalStore(Type expected, int index, Frame frame, Subroutine subroutine)
private void	evalWide(int pos, CodeIterator iter, Frame frame, Subroutine subroutine)
void	execute(MethodInfo method, int pos, CodeIterator iter, Frame frame, Subroutine subroutine)	Execute the instruction, modeling the effects on the specified frame and subroutine.
private Type	getType(String name)
private Type[]	paramTypesFromDesc(String desc)
private Type	resolveClassInfo(String info)
private Type	returnTypeFromDesc(String desc)
private Type	simplePeek(Frame frame)
private Type	simplePop(Frame frame)
private void	simplePush(Type type, Frame frame)
private void	simpleSetLocal(int index, Type type, Frame frame)
private Type	typeFromDesc(String desc)
private void	verifyAssignable(Type expected, Type type)
private Type	zeroExtend(Type type)

Methods inherited from class java.lang.Object

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

Field Details

constPool

private final ConstPool constPool

classPool

private final ClassPool classPool

STRING_TYPE

private final Type STRING_TYPE

CLASS_TYPE

private final Type CLASS_TYPE

THROWABLE_TYPE

private final Type THROWABLE_TYPE

lastPos

private int lastPos

Constructor Details

Executor

public Executor(ClassPool classPool,
 ConstPool constPool)

Method Details

execute

public void execute(MethodInfo method,
 int pos,
 CodeIterator iter,
 Frame frame,
 Subroutine subroutine)
             throws BadBytecode

Execute the instruction, modeling the effects on the specified frame and subroutine. If a subroutine is passed, the access flags will be modified if this instruction accesses the local variable table.

Parameters:

method - the method containing the instruction

pos - the position of the instruction in the method

iter - the code iterator used to find the instruction

frame - the frame to modify to represent the result of the instruction

subroutine - the optional subroutine this instruction belongs to.

Throws:

BadBytecode - if the bytecode violates the jvm spec

zeroExtend

private Type zeroExtend(Type type)

evalArrayLoad

private void evalArrayLoad(Type expectedComponent,
 Frame frame)
                    throws BadBytecode

Throws:

BadBytecode

evalArrayStore

private void evalArrayStore(Type expectedComponent,
 Frame frame)
                     throws BadBytecode

Throws:

BadBytecode

evalBinaryMath

private void evalBinaryMath(Type expected,
 Frame frame)
                     throws BadBytecode

Throws:

BadBytecode

evalGetField

private void evalGetField(int opcode,
 int index,
 Frame frame)
                   throws BadBytecode

Throws:

BadBytecode

evalInvokeIntfMethod

private void evalInvokeIntfMethod(int opcode,
 int index,
 Frame frame)
                           throws BadBytecode

Throws:

BadBytecode

evalInvokeMethod

private void evalInvokeMethod(int opcode,
 int index,
 Frame frame)
                       throws BadBytecode

Throws:

BadBytecode

evalInvokeDynamic

private void evalInvokeDynamic(int opcode,
 int index,
 Frame frame)
                        throws BadBytecode

Throws:

BadBytecode

evalLDC

private void evalLDC(int index,
 Frame frame)
              throws BadBytecode

Throws:

BadBytecode

evalLoad

private void evalLoad(Type expected,
 int index,
 Frame frame,
 Subroutine subroutine)
               throws BadBytecode

Throws:

BadBytecode

evalNewArray

private void evalNewArray(int pos,
 CodeIterator iter,
 Frame frame)
                   throws BadBytecode

Throws:

BadBytecode

evalNewObjectArray

private void evalNewObjectArray(int pos,
 CodeIterator iter,
 Frame frame)
                         throws BadBytecode

Throws:

BadBytecode

evalPutField

private void evalPutField(int opcode,
 int index,
 Frame frame)
                   throws BadBytecode

Throws:

BadBytecode

evalShift

private void evalShift(Type expected,
 Frame frame)
                throws BadBytecode

Throws:

BadBytecode

evalStore

private void evalStore(Type expected,
 int index,
 Frame frame,
 Subroutine subroutine)
                throws BadBytecode

Throws:

BadBytecode

evalWide

private void evalWide(int pos,
 CodeIterator iter,
 Frame frame,
 Subroutine subroutine)
               throws BadBytecode

Throws:

BadBytecode

getType

private Type getType(String name)
              throws BadBytecode

Throws:

BadBytecode

paramTypesFromDesc

private Type[] paramTypesFromDesc(String desc)
                           throws BadBytecode

Throws:

BadBytecode

returnTypeFromDesc

private Type returnTypeFromDesc(String desc)
                         throws BadBytecode

Throws:

BadBytecode

simplePeek

private Type simplePeek(Frame frame)

simplePop

private Type simplePop(Frame frame)

simplePush

private void simplePush(Type type,
 Frame frame)

access

private void access(int index,
 Type type,
 Subroutine subroutine)

simpleSetLocal

private void simpleSetLocal(int index,
 Type type,
 Frame frame)

resolveClassInfo

private Type resolveClassInfo(String info)
                       throws BadBytecode

Throws:

BadBytecode

typeFromDesc

private Type typeFromDesc(String desc)
                   throws BadBytecode

Throws:

BadBytecode

verifyAssignable

private void verifyAssignable(Type expected,
 Type type)
                       throws BadBytecode

Throws:

BadBytecode