Package proguard.classfile.instruction

Class ConstantInstruction

java.lang.Object

proguard.classfile.instruction.Instruction

proguard.classfile.instruction.ConstantInstruction

All Implemented Interfaces:

ConstantVisitor

public class ConstantInstruction
extends Instruction
implements ConstantVisitor

This Instruction represents an instruction that refers to an entry in the constant pool.

Field Summary

Fields

Modifier and Type	Field	Description
int	constant
int	constantIndex

Fields inherited from class proguard.classfile.instruction.Instruction

ARRAY_T_BOOLEAN, ARRAY_T_BYTE, ARRAY_T_CHAR, ARRAY_T_DOUBLE, ARRAY_T_FLOAT, ARRAY_T_INT, ARRAY_T_LONG, ARRAY_T_SHORT, NAMES, OP_AALOAD, OP_AASTORE, OP_ACONST_NULL, OP_ALOAD, OP_ALOAD_0, OP_ALOAD_1, OP_ALOAD_2, OP_ALOAD_3, OP_ANEWARRAY, OP_ARETURN, OP_ARRAYLENGTH, OP_ASTORE, OP_ASTORE_0, OP_ASTORE_1, OP_ASTORE_2, OP_ASTORE_3, OP_ATHROW, OP_BALOAD, OP_BASTORE, OP_BIPUSH, OP_CALOAD, OP_CASTORE, OP_CHECKCAST, OP_D2F, OP_D2I, OP_D2L, OP_DADD, OP_DALOAD, OP_DASTORE, OP_DCMPG, OP_DCMPL, OP_DCONST_0, OP_DCONST_1, OP_DDIV, OP_DLOAD, OP_DLOAD_0, OP_DLOAD_1, OP_DLOAD_2, OP_DLOAD_3, OP_DMUL, OP_DNEG, OP_DREM, OP_DRETURN, OP_DSTORE, OP_DSTORE_0, OP_DSTORE_1, OP_DSTORE_2, OP_DSTORE_3, OP_DSUB, OP_DUP, OP_DUP_X1, OP_DUP_X2, OP_DUP2, OP_DUP2_X1, OP_DUP2_X2, OP_F2D, OP_F2I, OP_F2L, OP_FADD, OP_FALOAD, OP_FASTORE, OP_FCMPG, OP_FCMPL, OP_FCONST_0, OP_FCONST_1, OP_FCONST_2, OP_FDIV, OP_FLOAD, OP_FLOAD_0, OP_FLOAD_1, OP_FLOAD_2, OP_FLOAD_3, OP_FMUL, OP_FNEG, OP_FREM, OP_FRETURN, OP_FSTORE, OP_FSTORE_0, OP_FSTORE_1, OP_FSTORE_2, OP_FSTORE_3, OP_FSUB, OP_GETFIELD, OP_GETSTATIC, OP_GOTO, OP_GOTO_W, OP_I2B, OP_I2C, OP_I2D, OP_I2F, OP_I2L, OP_I2S, OP_IADD, OP_IALOAD, OP_IAND, OP_IASTORE, OP_ICONST_0, OP_ICONST_1, OP_ICONST_2, OP_ICONST_3, OP_ICONST_4, OP_ICONST_5, OP_ICONST_M1, OP_IDIV, OP_IFACMPEQ, OP_IFACMPNE, OP_IFEQ, OP_IFGE, OP_IFGT, OP_IFICMPEQ, OP_IFICMPGE, OP_IFICMPGT, OP_IFICMPLE, OP_IFICMPLT, OP_IFICMPNE, OP_IFLE, OP_IFLT, OP_IFNE, OP_IFNONNULL, OP_IFNULL, OP_IINC, OP_ILOAD, OP_ILOAD_0, OP_ILOAD_1, OP_ILOAD_2, OP_ILOAD_3, OP_IMUL, OP_INEG, OP_INSTANCEOF, OP_INVOKEDYNAMIC, OP_INVOKEINTERFACE, OP_INVOKESPECIAL, OP_INVOKESTATIC, OP_INVOKEVIRTUAL, OP_IOR, OP_IREM, OP_IRETURN, OP_ISHL, OP_ISHR, OP_ISTORE, OP_ISTORE_0, OP_ISTORE_1, OP_ISTORE_2, OP_ISTORE_3, OP_ISUB, OP_IUSHR, OP_IXOR, OP_JSR, OP_JSR_W, OP_L2D, OP_L2F, OP_L2I, OP_LADD, OP_LALOAD, OP_LAND, OP_LASTORE, OP_LCMP, OP_LCONST_0, OP_LCONST_1, OP_LDC, OP_LDC_W, OP_LDC2_W, OP_LDIV, OP_LLOAD, OP_LLOAD_0, OP_LLOAD_1, OP_LLOAD_2, OP_LLOAD_3, OP_LMUL, OP_LNEG, OP_LOOKUPSWITCH, OP_LOR, OP_LREM, OP_LRETURN, OP_LSHL, OP_LSHR, OP_LSTORE, OP_LSTORE_0, OP_LSTORE_1, OP_LSTORE_2, OP_LSTORE_3, OP_LSUB, OP_LUSHR, OP_LXOR, OP_MONITORENTER, OP_MONITOREXIT, OP_MULTIANEWARRAY, OP_NEW, OP_NEWARRAY, OP_NOP, OP_POP, OP_POP2, OP_PUTFIELD, OP_PUTSTATIC, OP_RET, OP_RETURN, OP_SALOAD, OP_SASTORE, OP_SIPUSH, OP_SWAP, OP_TABLESWITCH, OP_WIDE, opcode

Constructor Summary

Constructors

Constructor	Description
ConstantInstruction()	Creates an uninitialized ConstantInstruction.
ConstantInstruction(byte opcode, int constantIndex)	Creates a new ConstantInstruction with the given opcode and constant pool index.
ConstantInstruction(byte opcode, int constantIndex, int constant)	Creates a new ConstantInstruction with the given opcode, constant pool index, and constant.

Method Summary

Modifier and Type	Method	Description
void	accept(Clazz clazz, Method method, CodeAttribute codeAttribute, int offset, InstructionVisitor instructionVisitor)	Accepts the given visitor.
byte	canonicalOpcode()	Returns the canonical opcode of this instruction, i.e.
ConstantInstruction	copy(ConstantInstruction constantInstruction)	Copies the given instruction into this instruction.
boolean	equals(Object o)
int	hashCode()
int	length(int offset)	Returns the length in bytes of the instruction.
boolean	mayInstanceThrowExceptions(Clazz clazz)	Returns whether a particular instance of an instruction may throw an exception.
protected void	readInfo(byte[] code, int offset)	Reads the data following the instruction opcode.
Instruction	shrink()	Shrinks this instruction to its shortest possible form.
int	stackPopCount(Clazz clazz)	Returns the number of entries popped from the stack during the execution of the instruction.
int	stackPushCount(Clazz clazz)	Returns the number of entries pushed onto the stack during the execution of the instruction.
String	toString()
String	toString(Clazz clazz, int offset)	Returns a description of the instruction, at the given offset.
void	visitClassConstant(Clazz clazz, ClassConstant classConstant)
void	visitDoubleConstant(Clazz clazz, DoubleConstant doubleConstant)
void	visitDynamicConstant(Clazz clazz, DynamicConstant dynamicConstant)
void	visitFieldrefConstant(Clazz clazz, FieldrefConstant fieldrefConstant)
void	visitFloatConstant(Clazz clazz, FloatConstant floatConstant)
void	visitIntegerConstant(Clazz clazz, IntegerConstant integerConstant)
void	visitInterfaceMethodrefConstant(Clazz clazz, InterfaceMethodrefConstant interfaceMethodrefConstant)
void	visitInvokeDynamicConstant(Clazz clazz, InvokeDynamicConstant invokeDynamicConstant)
void	visitLongConstant(Clazz clazz, LongConstant longConstant)
void	visitMethodHandleConstant(Clazz clazz, MethodHandleConstant methodHandleConstant)
void	visitMethodrefConstant(Clazz clazz, MethodrefConstant methodrefConstant)
void	visitMethodTypeConstant(Clazz clazz, MethodTypeConstant methodTypeConstant)
void	visitModuleConstant(Clazz clazz, ModuleConstant moduleConstant)
void	visitNameAndTypeConstant(Clazz clazz, NameAndTypeConstant nameAndTypeConstant)
void	visitPackageConstant(Clazz clazz, PackageConstant packageConstant)
void	visitPrimitiveArrayConstant(Clazz clazz, PrimitiveArrayConstant primitiveArrayConstant)
void	visitStringConstant(Clazz clazz, StringConstant stringConstant)
void	visitUtf8Constant(Clazz clazz, Utf8Constant utf8Constant)
protected void	writeInfo(byte[] code, int offset)	Writes data following the instruction opcode.

Methods inherited from class proguard.classfile.instruction.Instruction

actualOpcode, getName, isCategory2, isWide, mayThrowExceptions, readByte, readInt, readShort, readSignedByte, readSignedShort, readSignedValue, readValue, stackEntryIndexBefore, toString, write, write, writeByte, writeInt, writeShort, writeSignedByte, writeSignedShort, writeSignedValue, writeValue

Methods inherited from class java.lang.Object

clone, finalize, getClass, notify, notifyAll, wait, wait, wait

Methods inherited from interface proguard.classfile.constant.visitor.ConstantVisitor

visitAnyConstant, visitAnyMethodrefConstant, visitAnyRefConstant

Field Details

constantIndex

public int constantIndex

constant

public int constant

Constructor Details

ConstantInstruction

public ConstantInstruction()

Creates an uninitialized ConstantInstruction.

ConstantInstruction

public ConstantInstruction(byte opcode,
 int constantIndex)

Creates a new ConstantInstruction with the given opcode and constant pool index.

ConstantInstruction

public ConstantInstruction(byte opcode,
 int constantIndex,
 int constant)

Creates a new ConstantInstruction with the given opcode, constant pool index, and constant.

Method Details

copy

public ConstantInstruction copy(ConstantInstruction constantInstruction)

Copies the given instruction into this instruction.

Parameters:

constantInstruction - the instruction to be copied.

Returns:

this instruction.

mayInstanceThrowExceptions

public boolean mayInstanceThrowExceptions(Clazz clazz)

Returns whether a particular instance of an instruction may throw an exception.

In particular, this takes into account that an ldc with a class, method type or method ref constant operand may throw exceptions while other constants may not.

Overrides:

mayInstanceThrowExceptions in class Instruction

canonicalOpcode

public byte canonicalOpcode()

Description copied from class: Instruction

Returns the canonical opcode of this instruction, i.e. typically the opcode whose extension has been removed.

Overrides:

canonicalOpcode in class Instruction

shrink

public Instruction shrink()

Description copied from class: Instruction

Shrinks this instruction to its shortest possible form.

Specified by:

shrink in class Instruction

Returns:

this instruction.

readInfo

protected void readInfo(byte[] code,
 int offset)

Description copied from class: Instruction

Reads the data following the instruction opcode.

Specified by:

readInfo in class Instruction

writeInfo

protected void writeInfo(byte[] code,
 int offset)

Description copied from class: Instruction

Writes data following the instruction opcode.

Specified by:

writeInfo in class Instruction

length

public int length(int offset)

Description copied from class: Instruction

Returns the length in bytes of the instruction.

Specified by:

length in class Instruction

accept

public void accept(Clazz clazz,
 Method method,
 CodeAttribute codeAttribute,
 int offset,
 InstructionVisitor instructionVisitor)

Description copied from class: Instruction

Accepts the given visitor.

Specified by:

accept in class Instruction

toString

public String toString(Clazz clazz,
 int offset)

Description copied from class: Instruction

Returns a description of the instruction, at the given offset.

Overrides:

toString in class Instruction

stackPopCount

public int stackPopCount(Clazz clazz)

Description copied from class: Instruction

Returns the number of entries popped from the stack during the execution of the instruction.

Overrides:

stackPopCount in class Instruction

stackPushCount

public int stackPushCount(Clazz clazz)

Description copied from class: Instruction

Returns the number of entries pushed onto the stack during the execution of the instruction.

Overrides:

stackPushCount in class Instruction

visitIntegerConstant

public void visitIntegerConstant(Clazz clazz,
 IntegerConstant integerConstant)

Specified by:

visitIntegerConstant in interface ConstantVisitor

visitLongConstant

public void visitLongConstant(Clazz clazz,
 LongConstant longConstant)

Specified by:

visitLongConstant in interface ConstantVisitor

visitFloatConstant

public void visitFloatConstant(Clazz clazz,
 FloatConstant floatConstant)

Specified by:

visitFloatConstant in interface ConstantVisitor

visitDoubleConstant

public void visitDoubleConstant(Clazz clazz,
 DoubleConstant doubleConstant)

Specified by:

visitDoubleConstant in interface ConstantVisitor

visitPrimitiveArrayConstant

public void visitPrimitiveArrayConstant(Clazz clazz,
 PrimitiveArrayConstant primitiveArrayConstant)

Specified by:

visitPrimitiveArrayConstant in interface ConstantVisitor

visitStringConstant

public void visitStringConstant(Clazz clazz,
 StringConstant stringConstant)

Specified by:

visitStringConstant in interface ConstantVisitor

visitUtf8Constant

public void visitUtf8Constant(Clazz clazz,
 Utf8Constant utf8Constant)

Specified by:

visitUtf8Constant in interface ConstantVisitor

visitMethodHandleConstant

public void visitMethodHandleConstant(Clazz clazz,
 MethodHandleConstant methodHandleConstant)

Specified by:

visitMethodHandleConstant in interface ConstantVisitor

visitClassConstant

public void visitClassConstant(Clazz clazz,
 ClassConstant classConstant)

Specified by:

visitClassConstant in interface ConstantVisitor

visitMethodTypeConstant

public void visitMethodTypeConstant(Clazz clazz,
 MethodTypeConstant methodTypeConstant)

Specified by:

visitMethodTypeConstant in interface ConstantVisitor

visitModuleConstant

public void visitModuleConstant(Clazz clazz,
 ModuleConstant moduleConstant)

Specified by:

visitModuleConstant in interface ConstantVisitor

visitPackageConstant

public void visitPackageConstant(Clazz clazz,
 PackageConstant packageConstant)

Specified by:

visitPackageConstant in interface ConstantVisitor

visitFieldrefConstant

public void visitFieldrefConstant(Clazz clazz,
 FieldrefConstant fieldrefConstant)

Specified by:

visitFieldrefConstant in interface ConstantVisitor

visitDynamicConstant

public void visitDynamicConstant(Clazz clazz,
 DynamicConstant dynamicConstant)

Specified by:

visitDynamicConstant in interface ConstantVisitor

visitInvokeDynamicConstant

public void visitInvokeDynamicConstant(Clazz clazz,
 InvokeDynamicConstant invokeDynamicConstant)

Specified by:

visitInvokeDynamicConstant in interface ConstantVisitor

visitInterfaceMethodrefConstant

public void visitInterfaceMethodrefConstant(Clazz clazz,
 InterfaceMethodrefConstant interfaceMethodrefConstant)

Specified by:

visitInterfaceMethodrefConstant in interface ConstantVisitor

visitMethodrefConstant

public void visitMethodrefConstant(Clazz clazz,
 MethodrefConstant methodrefConstant)

Specified by:

visitMethodrefConstant in interface ConstantVisitor

visitNameAndTypeConstant

public void visitNameAndTypeConstant(Clazz clazz,
 NameAndTypeConstant nameAndTypeConstant)

Specified by:

visitNameAndTypeConstant in interface ConstantVisitor

toString

public String toString()

Overrides:

toString in class Object

equals

public boolean equals(Object o)

Specified by:

equals in class Instruction

hashCode

public int hashCode()

Specified by:

hashCode in class Instruction