proguard.classfile.util
Class InstructionSequenceMatcher

java.lang.Object
  proguard.classfile.util.SimplifiedVisitor
      proguard.classfile.util.InstructionSequenceMatcher

All Implemented Interfaces:

ConstantVisitor, InstructionVisitor

public class InstructionSequenceMatcher
extends SimplifiedVisitor
implements InstructionVisitor, ConstantVisitor

This InstructionVisitor checks whether a given pattern instruction sequence occurs in the instructions that are visited. The arguments of the instruction sequence can be wildcards that are matched.

Field Summary

static int	A
static int	B
static int	C
static int	D
static int	X
static int	Y
static int	Z

Constructor Summary

InstructionSequenceMatcher(Constant[] patternConstants, Instruction[] patternInstructions)
Creates a new InstructionSequenceMatcher.

Method Summary

int	instructionCount()
boolean	isMatching()
int	matchedArgument(int argument)
int[]	matchedArguments(int[] arguments)
int	matchedBranchOffset(int offset, int branchOffset)
int	matchedConstantIndex(int constantIndex)
int	matchedInstructionOffset(int index)
int[]	matchedJumpOffsets(int offset, int[] jumpOffsets)
void	reset() Starts matching from the first instruction again next time.
void	visitAnyRefConstant(Clazz clazz, RefConstant refConstant) Visits any type of RefConstant of the given class.
void	visitBranchInstruction(Clazz clazz, Method method, CodeAttribute codeAttribute, int offset, BranchInstruction branchInstruction)
void	visitClassConstant(Clazz clazz, ClassConstant classConstant)
void	visitConstantInstruction(Clazz clazz, Method method, CodeAttribute codeAttribute, int offset, ConstantInstruction constantInstruction)
void	visitDoubleConstant(Clazz clazz, DoubleConstant doubleConstant)
void	visitFloatConstant(Clazz clazz, FloatConstant floatConstant)
void	visitIntegerConstant(Clazz clazz, IntegerConstant integerConstant)
void	visitLongConstant(Clazz clazz, LongConstant longConstant)
void	visitLookUpSwitchInstruction(Clazz clazz, Method method, CodeAttribute codeAttribute, int offset, LookUpSwitchInstruction lookUpSwitchInstruction)
void	visitNameAndTypeConstant(Clazz clazz, NameAndTypeConstant nameAndTypeConstant)
void	visitSimpleInstruction(Clazz clazz, Method method, CodeAttribute codeAttribute, int offset, SimpleInstruction simpleInstruction)
void	visitStringConstant(Clazz clazz, StringConstant stringConstant)
void	visitTableSwitchInstruction(Clazz clazz, Method method, CodeAttribute codeAttribute, int offset, TableSwitchInstruction tableSwitchInstruction)
void	visitUtf8Constant(Clazz clazz, Utf8Constant utf8Constant)
void	visitVariableInstruction(Clazz clazz, Method method, CodeAttribute codeAttribute, int offset, VariableInstruction variableInstruction)

Methods inherited from class proguard.classfile.util.SimplifiedVisitor

visitAnnotation, visitAnnotation, visitAnnotation, visitAnnotation, visitAnnotation, visitAnnotationDefaultAttribute, visitAnnotationElementValue, visitAnyAnnotationsAttribute, visitAnyAttribute, visitAnyClass, visitAnyConstant, visitAnyElementValue, visitAnyInstruction, visitAnyMember, visitAnyMethodrefConstant, visitAnyParameterAnnotationsAttribute, visitAnyStackMapFrame, visitAnySwitchInstruction, visitAnyVerificationType, visitArrayElementValue, visitClassElementValue, visitCodeAttribute, visitConstantElementValue, visitConstantValueAttribute, visitDeprecatedAttribute, visitDeprecatedAttribute, visitDeprecatedAttribute, visitDeprecatedAttribute, visitDoubleType, visitEnclosingMethodAttribute, visitEnumConstantElementValue, visitExceptionsAttribute, visitFieldrefConstant, visitFloatType, visitFullFrame, visitInnerClassesAttribute, visitIntegerType, visitInterfaceMethodrefConstant, visitLessZeroFrame, visitLibraryClass, visitLibraryField, visitLibraryMember, visitLibraryMethod, visitLineNumberTableAttribute, visitLocalVariableTableAttribute, visitLocalVariableTypeTableAttribute, visitLongType, visitMethodrefConstant, visitMoreZeroFrame, visitNullType, visitObjectType, visitProgramClass, visitProgramField, visitProgramMember, visitProgramMethod, visitRuntimeInvisibleAnnotationsAttribute, visitRuntimeInvisibleAnnotationsAttribute, visitRuntimeInvisibleAnnotationsAttribute, visitRuntimeInvisibleAnnotationsAttribute, visitRuntimeInvisibleParameterAnnotationsAttribute, visitRuntimeVisibleAnnotationsAttribute, visitRuntimeVisibleAnnotationsAttribute, visitRuntimeVisibleAnnotationsAttribute, visitRuntimeVisibleAnnotationsAttribute, visitRuntimeVisibleParameterAnnotationsAttribute, visitSameOneFrame, visitSameZeroFrame, visitSignatureAttribute, visitSignatureAttribute, visitSignatureAttribute, visitSignatureAttribute, visitSourceDirAttribute, visitSourceFileAttribute, visitStackDoubleType, visitStackFloatType, visitStackIntegerType, visitStackLongType, visitStackMapAttribute, visitStackMapTableAttribute, visitStackNullType, visitStackObjectType, visitStackTopType, visitStackUninitializedThisType, visitStackUninitializedType, visitSyntheticAttribute, visitSyntheticAttribute, visitSyntheticAttribute, visitSyntheticAttribute, visitTopType, visitUninitializedThisType, visitUninitializedType, visitUnknownAttribute, visitVariablesDoubleType, visitVariablesFloatType, visitVariablesIntegerType, visitVariablesLongType, visitVariablesNullType, visitVariablesObjectType, visitVariablesTopType, visitVariablesUninitializedThisType, visitVariablesUninitializedType

Methods inherited from class java.lang.Object

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

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

visitFieldrefConstant, visitInterfaceMethodrefConstant, visitMethodrefConstant

Field Detail

X

public static final int X

See Also:

Constant Field Values

Y

public static final int Y

See Also:

Constant Field Values

Z

public static final int Z

See Also:

Constant Field Values

A

public static final int A

See Also:

Constant Field Values

B

public static final int B

See Also:

Constant Field Values

C

public static final int C

See Also:

Constant Field Values

D

public static final int D

See Also:

Constant Field Values

Constructor Detail

InstructionSequenceMatcher

public InstructionSequenceMatcher(Constant[] patternConstants,
                                  Instruction[] patternInstructions)

Creates a new InstructionSequenceMatcher.

Parameters:

patternConstants - any constants referenced by the pattern instruction.

patternInstructions - the pattern instruction sequence.

Method Detail

reset

public void reset()

Starts matching from the first instruction again next time.

isMatching

public boolean isMatching()

instructionCount

public int instructionCount()

matchedInstructionOffset

public int matchedInstructionOffset(int index)

matchedArgument

public int matchedArgument(int argument)

matchedArguments

public int[] matchedArguments(int[] arguments)

matchedConstantIndex

public int matchedConstantIndex(int constantIndex)

matchedBranchOffset

public int matchedBranchOffset(int offset,
                               int branchOffset)

matchedJumpOffsets

public int[] matchedJumpOffsets(int offset,
                                int[] jumpOffsets)

visitSimpleInstruction

public void visitSimpleInstruction(Clazz clazz,
                                   Method method,
                                   CodeAttribute codeAttribute,
                                   int offset,
                                   SimpleInstruction simpleInstruction)

Specified by:

visitSimpleInstruction in interface InstructionVisitor

Overrides:

visitSimpleInstruction in class SimplifiedVisitor

visitVariableInstruction

public void visitVariableInstruction(Clazz clazz,
                                     Method method,
                                     CodeAttribute codeAttribute,
                                     int offset,
                                     VariableInstruction variableInstruction)

Specified by:

visitVariableInstruction in interface InstructionVisitor

Overrides:

visitVariableInstruction in class SimplifiedVisitor

visitConstantInstruction

public void visitConstantInstruction(Clazz clazz,
                                     Method method,
                                     CodeAttribute codeAttribute,
                                     int offset,
                                     ConstantInstruction constantInstruction)

Specified by:

visitConstantInstruction in interface InstructionVisitor

Overrides:

visitConstantInstruction in class SimplifiedVisitor

visitBranchInstruction

public void visitBranchInstruction(Clazz clazz,
                                   Method method,
                                   CodeAttribute codeAttribute,
                                   int offset,
                                   BranchInstruction branchInstruction)

Specified by:

visitBranchInstruction in interface InstructionVisitor

Overrides:

visitBranchInstruction in class SimplifiedVisitor

visitTableSwitchInstruction

public void visitTableSwitchInstruction(Clazz clazz,
                                        Method method,
                                        CodeAttribute codeAttribute,
                                        int offset,
                                        TableSwitchInstruction tableSwitchInstruction)

Specified by:

visitTableSwitchInstruction in interface InstructionVisitor

Overrides:

visitTableSwitchInstruction in class SimplifiedVisitor

visitLookUpSwitchInstruction

public void visitLookUpSwitchInstruction(Clazz clazz,
                                         Method method,
                                         CodeAttribute codeAttribute,
                                         int offset,
                                         LookUpSwitchInstruction lookUpSwitchInstruction)

Specified by:

visitLookUpSwitchInstruction in interface InstructionVisitor

Overrides:

visitLookUpSwitchInstruction in class SimplifiedVisitor

visitIntegerConstant

public void visitIntegerConstant(Clazz clazz,
                                 IntegerConstant integerConstant)

Specified by:

visitIntegerConstant in interface ConstantVisitor

Overrides:

visitIntegerConstant in class SimplifiedVisitor

visitLongConstant

public void visitLongConstant(Clazz clazz,
                              LongConstant longConstant)

Specified by:

visitLongConstant in interface ConstantVisitor

Overrides:

visitLongConstant in class SimplifiedVisitor

visitFloatConstant

public void visitFloatConstant(Clazz clazz,
                               FloatConstant floatConstant)

Specified by:

visitFloatConstant in interface ConstantVisitor

Overrides:

visitFloatConstant in class SimplifiedVisitor

visitDoubleConstant

public void visitDoubleConstant(Clazz clazz,
                                DoubleConstant doubleConstant)

Specified by:

visitDoubleConstant in interface ConstantVisitor

Overrides:

visitDoubleConstant in class SimplifiedVisitor

visitStringConstant

public void visitStringConstant(Clazz clazz,
                                StringConstant stringConstant)

Specified by:

visitStringConstant in interface ConstantVisitor

Overrides:

visitStringConstant in class SimplifiedVisitor

visitUtf8Constant

public void visitUtf8Constant(Clazz clazz,
                              Utf8Constant utf8Constant)

Specified by:

visitUtf8Constant in interface ConstantVisitor

Overrides:

visitUtf8Constant in class SimplifiedVisitor

visitAnyRefConstant

public void visitAnyRefConstant(Clazz clazz,
                                RefConstant refConstant)

Description copied from class: SimplifiedVisitor

Visits any type of RefConstant of the given class.

Overrides:

visitAnyRefConstant in class SimplifiedVisitor

visitClassConstant

public void visitClassConstant(Clazz clazz,
                               ClassConstant classConstant)

Specified by:

visitClassConstant in interface ConstantVisitor

Overrides:

visitClassConstant in class SimplifiedVisitor

visitNameAndTypeConstant

public void visitNameAndTypeConstant(Clazz clazz,
                                     NameAndTypeConstant nameAndTypeConstant)

Specified by:

visitNameAndTypeConstant in interface ConstantVisitor

Overrides:

visitNameAndTypeConstant in class SimplifiedVisitor