proguard.classfile.editor
Class CodeAttributeEditor

java.lang.Object
  proguard.classfile.util.SimplifiedVisitor
      proguard.classfile.editor.CodeAttributeEditor

All Implemented Interfaces:

StackMapFrameVisitor, VerificationTypeVisitor, AttributeVisitor, ExceptionInfoVisitor, LineNumberInfoVisitor, LocalVariableInfoVisitor, LocalVariableTypeInfoVisitor, InstructionVisitor

public class CodeAttributeEditor
extends SimplifiedVisitor
implements AttributeVisitor, InstructionVisitor, ExceptionInfoVisitor, StackMapFrameVisitor, VerificationTypeVisitor, LineNumberInfoVisitor, LocalVariableInfoVisitor, LocalVariableTypeInfoVisitor

This AttributeVisitor accumulates specified changes to code, and then applies these accumulated changes to the code attributes that it visits.

Field Summary

boolean[]	deleted
Instruction[]	postInsertions
Instruction[]	preInsertions
Instruction[]	replacements

Constructor Summary

CodeAttributeEditor()

CodeAttributeEditor(boolean updateFrameSizes)

Method Summary

void	deleteInstruction(int instructionOffset) Remembers to delete the instruction at the given offset.
void	insertAfterInstruction(int instructionOffset, Instruction instruction) Remembers to place the given instruction right after the instruction at the given offset.
void	insertAfterInstruction(int instructionOffset, Instruction[] instructions) Remembers to place the given instructions right after the instruction at the given offset.
void	insertBeforeInstruction(int instructionOffset, Instruction instruction) Remembers to place the given instruction right before the instruction at the given offset.
void	insertBeforeInstruction(int instructionOffset, Instruction[] instructions) Remembers to place the given instructions right before the instruction at the given offset.
boolean	isModified(int instructionOffset) Returns whether the instruction at the given offset has been modified in any way.
void	replaceInstruction(int instructionOffset, Instruction instruction) Remembers to replace the instruction at the given offset by the given instruction.
void	replaceInstruction(int instructionOffset, Instruction[] instructions) Remembers to replace the instruction at the given offset by the given instructions.
void	reset(int codeLength) Resets the accumulated code changes.
void	undeleteInstruction(int instructionOffset) Remembers not to delete the instruction at the given offset.
void	visitAnyAttribute(Clazz clazz, Attribute attribute) Visit any type of attribute.
void	visitAnyStackMapFrame(Clazz clazz, Method method, CodeAttribute codeAttribute, int offset, StackMapFrame stackMapFrame) Visits any type of VerificationType.
void	visitAnyVerificationType(Clazz clazz, Method method, CodeAttribute codeAttribute, int offset, VerificationType verificationType) Visits any type of VerificationType.
void	visitBranchInstruction(Clazz clazz, Method method, CodeAttribute codeAttribute, int offset, BranchInstruction branchInstruction)
void	visitCodeAttribute(Clazz clazz, Method method, CodeAttribute codeAttribute)
void	visitCodeAttribute0(Clazz clazz, Method method, CodeAttribute codeAttribute)
void	visitConstantInstruction(Clazz clazz, Method method, CodeAttribute codeAttribute, int offset, ConstantInstruction constantInstruction)
void	visitExceptionInfo(Clazz clazz, Method method, CodeAttribute codeAttribute, ExceptionInfo exceptionInfo)
void	visitFullFrame(Clazz clazz, Method method, CodeAttribute codeAttribute, int offset, FullFrame fullFrame)
void	visitLineNumberInfo(Clazz clazz, Method method, CodeAttribute codeAttribute, LineNumberInfo lineNumberInfo)
void	visitLineNumberTableAttribute(Clazz clazz, Method method, CodeAttribute codeAttribute, LineNumberTableAttribute lineNumberTableAttribute)
void	visitLocalVariableInfo(Clazz clazz, Method method, CodeAttribute codeAttribute, LocalVariableInfo localVariableInfo)
void	visitLocalVariableTableAttribute(Clazz clazz, Method method, CodeAttribute codeAttribute, LocalVariableTableAttribute localVariableTableAttribute)
void	visitLocalVariableTypeInfo(Clazz clazz, Method method, CodeAttribute codeAttribute, LocalVariableTypeInfo localVariableTypeInfo)
void	visitLocalVariableTypeTableAttribute(Clazz clazz, Method method, CodeAttribute codeAttribute, LocalVariableTypeTableAttribute localVariableTypeTableAttribute)
void	visitLookUpSwitchInstruction(Clazz clazz, Method method, CodeAttribute codeAttribute, int offset, LookUpSwitchInstruction lookUpSwitchInstruction)
void	visitMoreZeroFrame(Clazz clazz, Method method, CodeAttribute codeAttribute, int offset, MoreZeroFrame moreZeroFrame)
void	visitSameOneFrame(Clazz clazz, Method method, CodeAttribute codeAttribute, int offset, SameOneFrame sameOneFrame)
void	visitSimpleInstruction(Clazz clazz, Method method, CodeAttribute codeAttribute, int offset, SimpleInstruction simpleInstruction)
void	visitStackMapAttribute(Clazz clazz, Method method, CodeAttribute codeAttribute, StackMapAttribute stackMapAttribute)
void	visitStackMapTableAttribute(Clazz clazz, Method method, CodeAttribute codeAttribute, StackMapTableAttribute stackMapTableAttribute)
void	visitTableSwitchInstruction(Clazz clazz, Method method, CodeAttribute codeAttribute, int offset, TableSwitchInstruction tableSwitchInstruction)
void	visitUninitializedType(Clazz clazz, Method method, CodeAttribute codeAttribute, int offset, UninitializedType uninitializedType)
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, visitAnyClass, visitAnyConstant, visitAnyElementValue, visitAnyInstruction, visitAnyMember, visitAnyMethodrefConstant, visitAnyParameterAnnotationsAttribute, visitAnyRefConstant, visitAnySwitchInstruction, visitArrayElementValue, visitClassConstant, visitClassElementValue, visitConstantElementValue, visitConstantValueAttribute, visitDeprecatedAttribute, visitDeprecatedAttribute, visitDeprecatedAttribute, visitDeprecatedAttribute, visitDoubleConstant, visitDoubleType, visitEnclosingMethodAttribute, visitEnumConstantElementValue, visitExceptionsAttribute, visitFieldrefConstant, visitFloatConstant, visitFloatType, visitInnerClassesAttribute, visitIntegerConstant, visitIntegerType, visitInterfaceMethodrefConstant, visitLessZeroFrame, visitLibraryClass, visitLibraryField, visitLibraryMember, visitLibraryMethod, visitLongConstant, visitLongType, visitMethodrefConstant, visitNameAndTypeConstant, visitNullType, visitObjectType, visitProgramClass, visitProgramField, visitProgramMember, visitProgramMethod, visitRuntimeInvisibleAnnotationsAttribute, visitRuntimeInvisibleAnnotationsAttribute, visitRuntimeInvisibleAnnotationsAttribute, visitRuntimeInvisibleAnnotationsAttribute, visitRuntimeInvisibleParameterAnnotationsAttribute, visitRuntimeVisibleAnnotationsAttribute, visitRuntimeVisibleAnnotationsAttribute, visitRuntimeVisibleAnnotationsAttribute, visitRuntimeVisibleAnnotationsAttribute, visitRuntimeVisibleParameterAnnotationsAttribute, visitSameZeroFrame, visitSignatureAttribute, visitSignatureAttribute, visitSignatureAttribute, visitSignatureAttribute, visitSourceDirAttribute, visitSourceFileAttribute, visitStackDoubleType, visitStackFloatType, visitStackIntegerType, visitStackLongType, visitStackNullType, visitStackObjectType, visitStackTopType, visitStackUninitializedThisType, visitStackUninitializedType, visitStringConstant, visitSyntheticAttribute, visitSyntheticAttribute, visitSyntheticAttribute, visitSyntheticAttribute, visitTopType, visitUninitializedThisType, 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.attribute.visitor.AttributeVisitor

visitAnnotationDefaultAttribute, visitConstantValueAttribute, visitDeprecatedAttribute, visitDeprecatedAttribute, visitDeprecatedAttribute, visitEnclosingMethodAttribute, visitExceptionsAttribute, visitInnerClassesAttribute, visitRuntimeInvisibleAnnotationsAttribute, visitRuntimeInvisibleAnnotationsAttribute, visitRuntimeInvisibleAnnotationsAttribute, visitRuntimeInvisibleParameterAnnotationsAttribute, visitRuntimeVisibleAnnotationsAttribute, visitRuntimeVisibleAnnotationsAttribute, visitRuntimeVisibleAnnotationsAttribute, visitRuntimeVisibleParameterAnnotationsAttribute, visitSignatureAttribute, visitSignatureAttribute, visitSignatureAttribute, visitSourceDirAttribute, visitSourceFileAttribute, visitSyntheticAttribute, visitSyntheticAttribute, visitSyntheticAttribute, visitUnknownAttribute

Methods inherited from interface proguard.classfile.attribute.preverification.visitor.StackMapFrameVisitor

visitLessZeroFrame, visitSameZeroFrame

Methods inherited from interface proguard.classfile.attribute.preverification.visitor.VerificationTypeVisitor

visitDoubleType, visitFloatType, visitIntegerType, visitLongType, visitNullType, visitObjectType, visitStackDoubleType, visitStackFloatType, visitStackIntegerType, visitStackLongType, visitStackNullType, visitStackObjectType, visitStackTopType, visitStackUninitializedThisType, visitStackUninitializedType, visitTopType, visitUninitializedThisType, visitVariablesDoubleType, visitVariablesFloatType, visitVariablesIntegerType, visitVariablesLongType, visitVariablesNullType, visitVariablesObjectType, visitVariablesTopType, visitVariablesUninitializedThisType, visitVariablesUninitializedType

Field Detail

preInsertions

public Instruction[] preInsertions

replacements

public Instruction[] replacements

postInsertions

public Instruction[] postInsertions

deleted

public boolean[] deleted

Constructor Detail

CodeAttributeEditor

public CodeAttributeEditor()

CodeAttributeEditor

public CodeAttributeEditor(boolean updateFrameSizes)

Method Detail

reset

public void reset(int codeLength)

Resets the accumulated code changes.

Parameters:

codeLength - the length of the code that will be edited next.

insertBeforeInstruction

public void insertBeforeInstruction(int instructionOffset,
                                    Instruction instruction)

Remembers to place the given instruction right before the instruction at the given offset.

Parameters:

instructionOffset - the offset of the instruction.

instruction - the new instruction.

insertBeforeInstruction

public void insertBeforeInstruction(int instructionOffset,
                                    Instruction[] instructions)

Remembers to place the given instructions right before the instruction at the given offset.

Parameters:

instructionOffset - the offset of the instruction.

instructions - the new instructions.

replaceInstruction

public void replaceInstruction(int instructionOffset,
                               Instruction instruction)

Remembers to replace the instruction at the given offset by the given instruction.

Parameters:

instructionOffset - the offset of the instruction to be replaced.

instruction - the new instruction.

replaceInstruction

public void replaceInstruction(int instructionOffset,
                               Instruction[] instructions)

Remembers to replace the instruction at the given offset by the given instructions.

Parameters:

instructionOffset - the offset of the instruction to be replaced.

instructions - the new instructions.

insertAfterInstruction

public void insertAfterInstruction(int instructionOffset,
                                   Instruction instruction)

Remembers to place the given instruction right after the instruction at the given offset.

Parameters:

instructionOffset - the offset of the instruction.

instruction - the new instruction.

insertAfterInstruction

public void insertAfterInstruction(int instructionOffset,
                                   Instruction[] instructions)

Remembers to place the given instructions right after the instruction at the given offset.

Parameters:

instructionOffset - the offset of the instruction.

instructions - the new instructions.

deleteInstruction

public void deleteInstruction(int instructionOffset)

Remembers to delete the instruction at the given offset.

Parameters:

instructionOffset - the offset of the instruction to be deleted.

undeleteInstruction

public void undeleteInstruction(int instructionOffset)

Remembers not to delete the instruction at the given offset.

Parameters:

instructionOffset - the offset of the instruction not to be deleted.

isModified

public boolean isModified(int instructionOffset)

Returns whether the instruction at the given offset has been modified in any way.

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

visitCodeAttribute0

public void visitCodeAttribute0(Clazz clazz,
                                Method method,
                                CodeAttribute codeAttribute)

visitStackMapAttribute

public void visitStackMapAttribute(Clazz clazz,
                                   Method method,
                                   CodeAttribute codeAttribute,
                                   StackMapAttribute stackMapAttribute)

Specified by:

visitStackMapAttribute in interface AttributeVisitor

Overrides:

visitStackMapAttribute in class SimplifiedVisitor

visitStackMapTableAttribute

public void visitStackMapTableAttribute(Clazz clazz,
                                        Method method,
                                        CodeAttribute codeAttribute,
                                        StackMapTableAttribute stackMapTableAttribute)

Specified by:

visitStackMapTableAttribute in interface AttributeVisitor

Overrides:

visitStackMapTableAttribute in class SimplifiedVisitor

visitLineNumberTableAttribute

public void visitLineNumberTableAttribute(Clazz clazz,
                                          Method method,
                                          CodeAttribute codeAttribute,
                                          LineNumberTableAttribute lineNumberTableAttribute)

Specified by:

visitLineNumberTableAttribute in interface AttributeVisitor

Overrides:

visitLineNumberTableAttribute in class SimplifiedVisitor

visitLocalVariableTableAttribute

public void visitLocalVariableTableAttribute(Clazz clazz,
                                             Method method,
                                             CodeAttribute codeAttribute,
                                             LocalVariableTableAttribute localVariableTableAttribute)

Specified by:

visitLocalVariableTableAttribute in interface AttributeVisitor

Overrides:

visitLocalVariableTableAttribute in class SimplifiedVisitor

visitLocalVariableTypeTableAttribute

public void visitLocalVariableTypeTableAttribute(Clazz clazz,
                                                 Method method,
                                                 CodeAttribute codeAttribute,
                                                 LocalVariableTypeTableAttribute localVariableTypeTableAttribute)

Specified by:

visitLocalVariableTypeTableAttribute in interface AttributeVisitor

Overrides:

visitLocalVariableTypeTableAttribute in class SimplifiedVisitor

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

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

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

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

visitExceptionInfo

public void visitExceptionInfo(Clazz clazz,
                               Method method,
                               CodeAttribute codeAttribute,
                               ExceptionInfo exceptionInfo)

Specified by:

visitExceptionInfo in interface ExceptionInfoVisitor

visitAnyStackMapFrame

public void visitAnyStackMapFrame(Clazz clazz,
                                  Method method,
                                  CodeAttribute codeAttribute,
                                  int offset,
                                  StackMapFrame stackMapFrame)

Description copied from class: SimplifiedVisitor

Visits any type of VerificationType.

Overrides:

visitAnyStackMapFrame in class SimplifiedVisitor

visitSameOneFrame

public void visitSameOneFrame(Clazz clazz,
                              Method method,
                              CodeAttribute codeAttribute,
                              int offset,
                              SameOneFrame sameOneFrame)

Specified by:

visitSameOneFrame in interface StackMapFrameVisitor

Overrides:

visitSameOneFrame in class SimplifiedVisitor

visitMoreZeroFrame

public void visitMoreZeroFrame(Clazz clazz,
                               Method method,
                               CodeAttribute codeAttribute,
                               int offset,
                               MoreZeroFrame moreZeroFrame)

Specified by:

visitMoreZeroFrame in interface StackMapFrameVisitor

Overrides:

visitMoreZeroFrame in class SimplifiedVisitor

visitFullFrame

public void visitFullFrame(Clazz clazz,
                           Method method,
                           CodeAttribute codeAttribute,
                           int offset,
                           FullFrame fullFrame)

Specified by:

visitFullFrame in interface StackMapFrameVisitor

Overrides:

visitFullFrame in class SimplifiedVisitor

visitAnyVerificationType

public void visitAnyVerificationType(Clazz clazz,
                                     Method method,
                                     CodeAttribute codeAttribute,
                                     int offset,
                                     VerificationType verificationType)

Description copied from class: SimplifiedVisitor

Visits any type of VerificationType.

Overrides:

visitAnyVerificationType in class SimplifiedVisitor

visitUninitializedType

public void visitUninitializedType(Clazz clazz,
                                   Method method,
                                   CodeAttribute codeAttribute,
                                   int offset,
                                   UninitializedType uninitializedType)

Specified by:

visitUninitializedType in interface VerificationTypeVisitor

Overrides:

visitUninitializedType in class SimplifiedVisitor

visitLineNumberInfo

public void visitLineNumberInfo(Clazz clazz,
                                Method method,
                                CodeAttribute codeAttribute,
                                LineNumberInfo lineNumberInfo)

Specified by:

visitLineNumberInfo in interface LineNumberInfoVisitor

visitLocalVariableInfo

public void visitLocalVariableInfo(Clazz clazz,
                                   Method method,
                                   CodeAttribute codeAttribute,
                                   LocalVariableInfo localVariableInfo)

Specified by:

visitLocalVariableInfo in interface LocalVariableInfoVisitor

visitLocalVariableTypeInfo

public void visitLocalVariableTypeInfo(Clazz clazz,
                                       Method method,
                                       CodeAttribute codeAttribute,
                                       LocalVariableTypeInfo localVariableTypeInfo)

Specified by:

visitLocalVariableTypeInfo in interface LocalVariableTypeInfoVisitor