proguard.classfile.attribute.visitor

Class StackSizeComputer

java.lang.Object

proguard.classfile.attribute.visitor.StackSizeComputer

All Implemented Interfaces:

AttributeVisitor, ExceptionInfoVisitor, InstructionVisitor

public class StackSizeComputer
extends java.lang.Object
implements AttributeVisitor, InstructionVisitor, ExceptionInfoVisitor

This AttributeVisitor computes the stack sizes at all instruction offsets of the code attributes that it visits.

Constructor Summary

Constructors

Constructor and Description
StackSizeComputer()

Method Summary

Modifier and Type	Method and Description
int	getMaxStackSize() Returns the maximum stack size of the most recently visited code attribute.
int	getStackSizeAfter(int instructionOffset) Returns the stack size after the given instruction offset of the most recently visited code attribute.
int	getStackSizeBefore(int instructionOffset) Returns the stack size before the given instruction offset of the most recently visited code attribute.
boolean	isReachable(int instructionOffset) Returns whether the instruction at the given offset is reachable in the most recently visited code attribute.
void	visitAnyAttribute(Clazz clazz, Attribute attribute) Visits any Attribute instance.
void	visitAnySwitchInstruction(Clazz clazz, Method method, CodeAttribute codeAttribute, int offset, SwitchInstruction switchInstruction) Visits any SwitchInstruction instance.
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	visitSimpleInstruction(Clazz clazz, Method method, CodeAttribute codeAttribute, int offset, SimpleInstruction simpleInstruction)
void	visitVariableInstruction(Clazz clazz, Method method, CodeAttribute codeAttribute, int offset, VariableInstruction variableInstruction)

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, visitAnyAnnotationsAttribute, visitAnyParameterAnnotationsAttribute, visitAnyTypeAnnotationsAttribute, visitBootstrapMethodsAttribute, visitConstantValueAttribute, visitDeprecatedAttribute, visitDeprecatedAttribute, visitDeprecatedAttribute, visitDeprecatedAttribute, visitEnclosingMethodAttribute, visitExceptionsAttribute, visitInnerClassesAttribute, visitLineNumberTableAttribute, visitLocalVariableTableAttribute, visitLocalVariableTypeTableAttribute, visitMethodParametersAttribute, visitModuleAttribute, visitModuleMainClassAttribute, visitModulePackagesAttribute, visitNestHostAttribute, visitNestMembersAttribute, visitPermittedSubclassesAttribute, visitRecordAttribute, visitRuntimeInvisibleAnnotationsAttribute, visitRuntimeInvisibleAnnotationsAttribute, visitRuntimeInvisibleAnnotationsAttribute, visitRuntimeInvisibleAnnotationsAttribute, visitRuntimeInvisibleAnnotationsAttribute, visitRuntimeInvisibleParameterAnnotationsAttribute, visitRuntimeInvisibleTypeAnnotationsAttribute, visitRuntimeInvisibleTypeAnnotationsAttribute, visitRuntimeInvisibleTypeAnnotationsAttribute, visitRuntimeInvisibleTypeAnnotationsAttribute, visitRuntimeInvisibleTypeAnnotationsAttribute, visitRuntimeInvisibleTypeAnnotationsAttribute, visitRuntimeVisibleAnnotationsAttribute, visitRuntimeVisibleAnnotationsAttribute, visitRuntimeVisibleAnnotationsAttribute, visitRuntimeVisibleAnnotationsAttribute, visitRuntimeVisibleAnnotationsAttribute, visitRuntimeVisibleParameterAnnotationsAttribute, visitRuntimeVisibleTypeAnnotationsAttribute, visitRuntimeVisibleTypeAnnotationsAttribute, visitRuntimeVisibleTypeAnnotationsAttribute, visitRuntimeVisibleTypeAnnotationsAttribute, visitRuntimeVisibleTypeAnnotationsAttribute, visitRuntimeVisibleTypeAnnotationsAttribute, visitSignatureAttribute, visitSignatureAttribute, visitSignatureAttribute, visitSignatureAttribute, visitSignatureAttribute, visitSourceDebugExtensionAttribute, visitSourceDirAttribute, visitSourceFileAttribute, visitStackMapAttribute, visitStackMapTableAttribute, visitSyntheticAttribute, visitSyntheticAttribute, visitSyntheticAttribute, visitSyntheticAttribute, visitUnknownAttribute

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

visitAnyInstruction, visitLookUpSwitchInstruction, visitTableSwitchInstruction

Constructor Detail

StackSizeComputer

public StackSizeComputer()

Method Detail

isReachable

public boolean isReachable(int instructionOffset)

Returns whether the instruction at the given offset is reachable in the most recently visited code attribute.

getStackSizeBefore

public int getStackSizeBefore(int instructionOffset)

Returns the stack size before the given instruction offset of the most recently visited code attribute.

getStackSizeAfter

public int getStackSizeAfter(int instructionOffset)

Returns the stack size after the given instruction offset of the most recently visited code attribute.

getMaxStackSize

public int getMaxStackSize()

Returns the maximum stack size of the most recently visited code attribute.

visitAnyAttribute

public void visitAnyAttribute(Clazz clazz,
                              Attribute attribute)

Description copied from interface: AttributeVisitor

Visits any Attribute instance. The more specific default implementations of this interface delegate to this method.

Specified by:

visitAnyAttribute in interface AttributeVisitor

visitCodeAttribute

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

Specified by:

visitCodeAttribute in interface AttributeVisitor

visitCodeAttribute0

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

visitSimpleInstruction

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

Specified by:

visitSimpleInstruction in interface InstructionVisitor

visitConstantInstruction

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

Specified by:

visitConstantInstruction in interface InstructionVisitor

visitVariableInstruction

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

Specified by:

visitVariableInstruction in interface InstructionVisitor

visitBranchInstruction

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

Specified by:

visitBranchInstruction in interface InstructionVisitor

visitAnySwitchInstruction

public void visitAnySwitchInstruction(Clazz clazz,
                                      Method method,
                                      CodeAttribute codeAttribute,
                                      int offset,
                                      SwitchInstruction switchInstruction)

Description copied from interface: InstructionVisitor

Visits any SwitchInstruction instance. The more specific default implementations of this interface delegate to this method.

Specified by:

visitAnySwitchInstruction in interface InstructionVisitor

visitExceptionInfo

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

Specified by:

visitExceptionInfo in interface ExceptionInfoVisitor