proguard.optimize.info

Class ParameterUsageMarker

java.lang.Object

proguard.classfile.util.SimplifiedVisitor

proguard.optimize.info.ParameterUsageMarker

All Implemented Interfaces:

AttributeVisitor, InstructionVisitor, MemberVisitor

public class ParameterUsageMarker
extends SimplifiedVisitor
implements MemberVisitor, AttributeVisitor, InstructionVisitor

This MemberVisitor counts the parameters and marks the used parameters of the methods that it visits. It also marks the 'this' parameters of methods that have hierarchies.

Author:

Eric Lafortune

Constructor Summary

Constructors

Constructor and Description
ParameterUsageMarker() Creates a new ParameterUsageMarker.
ParameterUsageMarker(boolean markThisParameter, boolean markAllParameters) Creates a new ParameterUsageMarker that optionally marks all parameters.

Method Summary

Methods

Modifier and Type	Method and Description
static int	getParameterSize(Method method) Returns the total size of the parameters.
static long	getUsedParameters(Method method) Returns which parameters are being used.
static boolean	isParameterUsed(Method method, int variableIndex) Returns whether the given parameter is being used.
static void	markParameterUsed(Method method, int variableIndex) Marks the given parameter as being used.
static void	markUsedParameters(Method method, long usedParameters) Marks the given parameters as being used.
void	visitAnyAttribute(Clazz clazz, Attribute attribute) Visit any type of attribute.
void	visitAnyInstruction(Clazz clazz, Method method, CodeAttribute codeAttribute, int offset, Instruction instruction) Visits any type of Instruction.
void	visitCodeAttribute(Clazz clazz, Method method, CodeAttribute codeAttribute)
void	visitLibraryMethod(LibraryClass libraryClass, LibraryMethod libraryMethod)
void	visitProgramMethod(ProgramClass programClass, ProgramMethod programMethod)
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, visitAnnotation, visitAnnotationDefaultAttribute, visitAnnotationElementValue, visitAnyAnnotationsAttribute, visitAnyClass, visitAnyConstant, visitAnyElementValue, visitAnyMember, visitAnyMethodrefConstant, visitAnyParameterAnnotationsAttribute, visitAnyRefConstant, visitAnyStackMapFrame, visitAnySwitchInstruction, visitAnyTargetInfo, visitAnyTypeAnnotationsAttribute, visitAnyVerificationType, visitArrayElementValue, visitBootstrapMethodsAttribute, visitBranchInstruction, visitCatchTargetInfo, visitClassConstant, visitClassElementValue, visitConstantElementValue, visitConstantInstruction, visitConstantValueAttribute, visitDeprecatedAttribute, visitDeprecatedAttribute, visitDeprecatedAttribute, visitDeprecatedAttribute, visitDoubleConstant, visitDoubleType, visitEmptyTargetInfo, visitEmptyTargetInfo, visitEmptyTargetInfo, visitEnclosingMethodAttribute, visitEnumConstantElementValue, visitExceptionsAttribute, visitFieldrefConstant, visitFloatConstant, visitFloatType, visitFormalParameterTargetInfo, visitFullFrame, visitInnerClassesAttribute, visitIntegerConstant, visitIntegerType, visitInterfaceMethodrefConstant, visitInvokeDynamicConstant, visitLessZeroFrame, visitLibraryClass, visitLibraryField, visitLibraryMember, visitLineNumberTableAttribute, visitLocalVariableTableAttribute, visitLocalVariableTargetInfo, visitLocalVariableTypeTableAttribute, visitLongConstant, visitLongType, visitLookUpSwitchInstruction, visitMethodHandleConstant, visitMethodParametersAttribute, visitMethodrefConstant, visitMethodTypeConstant, visitMoreZeroFrame, visitNameAndTypeConstant, visitNullType, visitObjectType, visitOffsetTargetInfo, visitProgramClass, visitProgramField, visitProgramMember, visitRuntimeInvisibleAnnotationsAttribute, visitRuntimeInvisibleAnnotationsAttribute, visitRuntimeInvisibleAnnotationsAttribute, visitRuntimeInvisibleAnnotationsAttribute, visitRuntimeInvisibleParameterAnnotationsAttribute, visitRuntimeInvisibleTypeAnnotationsAttribute, visitRuntimeInvisibleTypeAnnotationsAttribute, visitRuntimeInvisibleTypeAnnotationsAttribute, visitRuntimeInvisibleTypeAnnotationsAttribute, visitRuntimeInvisibleTypeAnnotationsAttribute, visitRuntimeVisibleAnnotationsAttribute, visitRuntimeVisibleAnnotationsAttribute, visitRuntimeVisibleAnnotationsAttribute, visitRuntimeVisibleAnnotationsAttribute, visitRuntimeVisibleParameterAnnotationsAttribute, visitRuntimeVisibleTypeAnnotationsAttribute, visitRuntimeVisibleTypeAnnotationsAttribute, visitRuntimeVisibleTypeAnnotationsAttribute, visitRuntimeVisibleTypeAnnotationsAttribute, visitRuntimeVisibleTypeAnnotationsAttribute, visitSameOneFrame, visitSameZeroFrame, visitSignatureAttribute, visitSignatureAttribute, visitSignatureAttribute, visitSignatureAttribute, visitSimpleInstruction, visitSourceDirAttribute, visitSourceFileAttribute, visitStackDoubleType, visitStackFloatType, visitStackIntegerType, visitStackLongType, visitStackMapAttribute, visitStackMapTableAttribute, visitStackNullType, visitStackObjectType, visitStackTopType, visitStackUninitializedThisType, visitStackUninitializedType, visitStringConstant, visitSuperTypeTargetInfo, visitSyntheticAttribute, visitSyntheticAttribute, visitSyntheticAttribute, visitSyntheticAttribute, visitTableSwitchInstruction, visitThrowsTargetInfo, visitTopType, visitTypeAnnotation, visitTypeAnnotation, visitTypeAnnotation, visitTypeAnnotation, visitTypeAnnotation, visitTypeAnnotation, visitTypeArgumentTargetInfo, visitTypeParameterBoundTargetInfo, visitTypeParameterBoundTargetInfo, visitTypeParameterBoundTargetInfo, visitTypeParameterBoundTargetInfo, visitTypeParameterTargetInfo, visitTypeParameterTargetInfo, visitTypePathInfo, visitTypePathInfo, visitTypePathInfo, visitTypePathInfo, visitTypePathInfo, visitUninitializedThisType, visitUninitializedType, visitUnknownAttribute, visitUtf8Constant, 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.visitor.MemberVisitor

visitLibraryField, visitProgramField

Methods inherited from interface proguard.classfile.attribute.visitor.AttributeVisitor

visitAnnotationDefaultAttribute, visitBootstrapMethodsAttribute, visitConstantValueAttribute, visitDeprecatedAttribute, visitDeprecatedAttribute, visitDeprecatedAttribute, visitEnclosingMethodAttribute, visitExceptionsAttribute, visitInnerClassesAttribute, visitLineNumberTableAttribute, visitLocalVariableTableAttribute, visitLocalVariableTypeTableAttribute, visitMethodParametersAttribute, visitRuntimeInvisibleAnnotationsAttribute, visitRuntimeInvisibleAnnotationsAttribute, visitRuntimeInvisibleAnnotationsAttribute, visitRuntimeInvisibleParameterAnnotationsAttribute, visitRuntimeInvisibleTypeAnnotationsAttribute, visitRuntimeInvisibleTypeAnnotationsAttribute, visitRuntimeInvisibleTypeAnnotationsAttribute, visitRuntimeInvisibleTypeAnnotationsAttribute, visitRuntimeVisibleAnnotationsAttribute, visitRuntimeVisibleAnnotationsAttribute, visitRuntimeVisibleAnnotationsAttribute, visitRuntimeVisibleParameterAnnotationsAttribute, visitRuntimeVisibleTypeAnnotationsAttribute, visitRuntimeVisibleTypeAnnotationsAttribute, visitRuntimeVisibleTypeAnnotationsAttribute, visitRuntimeVisibleTypeAnnotationsAttribute, visitSignatureAttribute, visitSignatureAttribute, visitSignatureAttribute, visitSourceDirAttribute, visitSourceFileAttribute, visitStackMapAttribute, visitStackMapTableAttribute, visitSyntheticAttribute, visitSyntheticAttribute, visitSyntheticAttribute, visitUnknownAttribute

Methods inherited from interface proguard.classfile.instruction.visitor.InstructionVisitor

visitBranchInstruction, visitConstantInstruction, visitLookUpSwitchInstruction, visitSimpleInstruction, visitTableSwitchInstruction

Constructor Detail

ParameterUsageMarker

public ParameterUsageMarker()

Creates a new ParameterUsageMarker.

ParameterUsageMarker

public ParameterUsageMarker(boolean markThisParameter,
                    boolean markAllParameters)

Creates a new ParameterUsageMarker that optionally marks all parameters.

Parameters:

markThisParameter - specifies whether all 'this' parameters should be marked as being used.

markAllParameters - specifies whether all other parameters should be marked as being used.

Method Detail

visitProgramMethod

public void visitProgramMethod(ProgramClass programClass,
                      ProgramMethod programMethod)

Specified by:

visitProgramMethod in interface MemberVisitor

Overrides:

visitProgramMethod in class SimplifiedVisitor

visitLibraryMethod

public void visitLibraryMethod(LibraryClass libraryClass,
                      LibraryMethod libraryMethod)

Specified by:

visitLibraryMethod in interface MemberVisitor

Overrides:

visitLibraryMethod in class SimplifiedVisitor

visitAnyAttribute

public void visitAnyAttribute(Clazz clazz,
                     Attribute attribute)

Description copied from class: SimplifiedVisitor

Visit any type of attribute.

Overrides:

visitAnyAttribute in class SimplifiedVisitor

visitCodeAttribute

public void visitCodeAttribute(Clazz clazz,
                      Method method,
                      CodeAttribute codeAttribute)

Specified by:

visitCodeAttribute in interface AttributeVisitor

Overrides:

visitCodeAttribute in class SimplifiedVisitor

visitAnyInstruction

public void visitAnyInstruction(Clazz clazz,
                       Method method,
                       CodeAttribute codeAttribute,
                       int offset,
                       Instruction instruction)

Description copied from class: SimplifiedVisitor

Visits any type of Instruction.

Overrides:

visitAnyInstruction 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

getParameterSize

public static int getParameterSize(Method method)

Returns the total size of the parameters.

markParameterUsed

public static void markParameterUsed(Method method,
                     int variableIndex)

Marks the given parameter as being used.

markUsedParameters

public static void markUsedParameters(Method method,
                      long usedParameters)

Marks the given parameters as being used.

isParameterUsed

public static boolean isParameterUsed(Method method,
                      int variableIndex)

Returns whether the given parameter is being used.

getUsedParameters

public static long getUsedParameters(Method method)

Returns which parameters are being used.