Class FindPuzzlers

java.lang.Object

edu.umd.cs.findbugs.visitclass.BetterVisitor

edu.umd.cs.findbugs.visitclass.PreorderVisitor

edu.umd.cs.findbugs.visitclass.AnnotationVisitor

edu.umd.cs.findbugs.visitclass.DismantleBytecode

edu.umd.cs.findbugs.BytecodeScanningDetector

edu.umd.cs.findbugs.bcel.OpcodeStackDetector

edu.umd.cs.findbugs.detect.FindPuzzlers

All Implemented Interfaces:

Detector, Priorities, org.apache.bcel.classfile.Visitor

public class FindPuzzlers
extends OpcodeStackDetector

Nested Class Summary

Nested classes/interfaces inherited from class OpcodeStackDetector

OpcodeStackDetector.WithCustomJumpInfo

Field Summary

Fields

Modifier and Type	Field	Description
(package private) int	badlyComputingOddState
(package private) int	becameTop
(package private) int	best_priority_for_ICAST_INTEGER_MULTIPLY_CAST_TO_LONG
(package private) final BugAccumulator	bugAccumulator
(package private) final BugReporter	bugReporter
(package private) boolean	constantArgumentToShift
(package private) int	imul_constant
(package private) int	imul_distance
(package private) boolean	imul_operand_is_parameter
(package private) boolean	isTigerOrHigher
(package private) static ClassDescriptor	ITERATOR
(package private) static ClassDescriptor	MAP_ENTRY
(package private) BugInstance	pendingUnreachableBranch
(package private) XMethod	previousMethodInvocation
(package private) int	prevOpCode
(package private) int	prevOpcodeIncrementedRegister
(package private) boolean	shiftOfNonnegativeValue
(package private) static FieldDescriptor	SYSTEM_ERR
(package private) static FieldDescriptor	SYSTEM_OUT
(package private) int	ternaryConversionState
private final boolean	testingEnabled
(package private) int	valueOfConstantArgumentToShift

Fields inherited from class OpcodeStackDetector

stack

Fields inherited from class DismantleBytecode

codeBytes, lineNumberTable, M_BR, M_CP, M_INT, M_PAD, M_R, M_UINT

Fields inherited from interface Priorities

EXP_PRIORITY, HIGH_PRIORITY, IGNORE_PRIORITY, LOW_PRIORITY, NORMAL_PRIORITY

Constructor Summary

Constructors

Constructor	Description
FindPuzzlers(BugReporter bugReporter)

Method Summary

Modifier and Type	Method	Description
private int	adjustMultiplier(Object constant, int mul)
private int	adjustPriority(int factor, int priority)
boolean	beforeOpcode(int seen)	return false if we should skip calling sawOpcode
(package private) boolean	extendsThread(org.apache.bcel.classfile.JavaClass obj)
(package private) boolean	implementsRunnable(org.apache.bcel.classfile.JavaClass obj)
private void	resetIMulCastLong()
void	sawOpcode(int seen)	By default, this method will not be called when stack is TOP.
void	visit(org.apache.bcel.classfile.Code obj)
void	visit(org.apache.bcel.classfile.JavaClass obj)

Methods inherited from class OpcodeStackDetector

afterOpcode, getStack, isUsingCustomUserValue, visitCode

Methods inherited from class BytecodeScanningDetector

getClassContext, report, shouldVisitCode, visitClassContext

Methods inherited from class DismantleBytecode

areOppositeBranches, atCatchBlock, getBranchFallThrough, getBranchOffset, getBranchTarget, getClassConstantOperand, getClassDescriptorOperand, getCodeByte, getConstantRefOperand, getDefaultSwitchOffset, getDottedClassConstantOperand, getFieldDescriptorOperand, getIntConstant, getLongConstant, getMaxPC, getMethodDescriptorOperand, getNameConstantOperand, getNextCodeByte, getNextOpcode, getNextPC, getOpcode, getPC, getPrevOpcode, getRefConstantOperand, getRefFieldIsStatic, getRegisterOperand, getSigConstantOperand, getStringConstantOperand, getSwitchLabels, getSwitchOffsets, getXClassOperand, getXFieldOperand, getXMethodOperand, isBranch, isMethodCall, isRegisterLoad, isRegisterStore, isRegisterStore, isReturn, isShift, isSwitch, isWideOpcode, printOpCode, sawBranchTo, sawClass, sawDouble, sawField, sawFloat, sawIMethod, sawInt, sawLong, sawMethod, sawRegister, sawString

Methods inherited from class AnnotationVisitor

getAnnotationParameterAsEnum, getAnnotationParameterAsString, getAnnotationParameterAsStringArray, visitAnnotation, visitAnnotation, visitParameterAnnotation, visitParameterAnnotation, visitSyntheticParameterAnnotation

Methods inherited from class PreorderVisitor

amVisitingMainMethod, asUnsignedByte, doVisitMethod, getClassDescriptor, getClassName, getCode, getConstantPool, getDottedClassName, getDottedFieldSig, getDottedMethodSig, getDottedSuperclassName, getField, getFieldDescriptor, getFieldIsStatic, getFieldName, getFieldSig, getFullyQualifiedFieldName, getFullyQualifiedMethodName, getMethod, getMethodDescriptor, getMethodName, getMethodSig, getMethodVisitOrder, getNumberArguments, getNumberMethodArguments, getPackageName, getSizeOfSurroundingTryBlock, getSizeOfSurroundingTryBlock, getSourceFile, getStringFromIndex, getSuperclassName, getSurroundingCaughtExceptions, getSurroundingCaughtExceptions, getSurroundingCaughtExceptionTypes, getSurroundingTryBlock, getSurroundingTryBlock, getThisClass, getXClass, getXField, getXMethod, hasInterestingClass, hasInterestingMethod, isVisitMethodsInCallOrder, setupVisitorForClass, setVisitMethodsInCallOrder, shouldVisit, toString, visitAfter, visitAfter, visitAnnotationDefault, visitAnnotationEntry, visitBootstrapMethods, visitConstantInvokeDynamic, visitConstantMethodHandle, visitConstantMethodType, visitConstantModule, visitConstantPackage, visitConstantPool, visitEnclosingMethod, visitingField, visitingMethod, visitInnerClasses, visitJavaClass, visitLineNumberTable, visitLocalVariableTable, visitMethodParameters, visitParameterAnnotationEntry, visitStackMap, visitStackMapEntry

Methods inherited from class BetterVisitor

clone, report, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visitCodeException, visitConstantClass, visitConstantDouble, visitConstantFieldref, visitConstantFloat, visitConstantInteger, visitConstantInterfaceMethodref, visitConstantLong, visitConstantMethodref, visitConstantNameAndType, visitConstantString, visitConstantUtf8, visitConstantValue, visitDeprecated, visitExceptionTable, visitField, visitInnerClass, visitLineNumber, visitLocalVariable, visitLocalVariableTypeTable, visitMethod, visitSignature, visitSourceFile, visitSynthetic, visitUnknown

Methods inherited from class Object

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

Methods inherited from interface org.apache.bcel.classfile.Visitor

visitConstantDynamic, visitMethodParameter, visitModule, visitModuleExports, visitModuleMainClass, visitModuleOpens, visitModulePackages, visitModuleProvides, visitModuleRequires, visitNestHost, visitNestMembers, visitRecord, visitRecordComponent, visitStackMapType

Field Details

SYSTEM_OUT

static FieldDescriptor SYSTEM_OUT

SYSTEM_ERR

static FieldDescriptor SYSTEM_ERR

bugReporter

final BugReporter bugReporter

bugAccumulator

final BugAccumulator bugAccumulator

testingEnabled

private final boolean testingEnabled

becameTop

int becameTop

imul_constant

int imul_constant

imul_distance

int imul_distance

imul_operand_is_parameter

boolean imul_operand_is_parameter

prevOpcodeIncrementedRegister

int prevOpcodeIncrementedRegister

valueOfConstantArgumentToShift

int valueOfConstantArgumentToShift

best_priority_for_ICAST_INTEGER_MULTIPLY_CAST_TO_LONG

int best_priority_for_ICAST_INTEGER_MULTIPLY_CAST_TO_LONG

constantArgumentToShift

boolean constantArgumentToShift

shiftOfNonnegativeValue

boolean shiftOfNonnegativeValue

ternaryConversionState

int ternaryConversionState

badlyComputingOddState

int badlyComputingOddState

prevOpCode

int prevOpCode

previousMethodInvocation

XMethod previousMethodInvocation

isTigerOrHigher

boolean isTigerOrHigher

ITERATOR

static ClassDescriptor ITERATOR

MAP_ENTRY

static ClassDescriptor MAP_ENTRY

pendingUnreachableBranch

BugInstance pendingUnreachableBranch

Constructor Details

FindPuzzlers

public FindPuzzlers(BugReporter bugReporter)

Method Details

visit

public void visit(org.apache.bcel.classfile.Code obj)

Overrides:

visit in class DismantleBytecode

visit

public void visit(org.apache.bcel.classfile.JavaClass obj)

Overrides:

visit in class BetterVisitor

resetIMulCastLong

private void resetIMulCastLong()

adjustPriority

private int adjustPriority(int factor,
 int priority)

adjustMultiplier

private int adjustMultiplier(Object constant,
 int mul)

beforeOpcode

public boolean beforeOpcode(int seen)

Description copied from class: DismantleBytecode

return false if we should skip calling sawOpcode

Overrides:

beforeOpcode in class OpcodeStackDetector

sawOpcode

public void sawOpcode(int seen)

Description copied from class: OpcodeStackDetector

By default, this method will not be called when stack is TOP. To change this behavior, override #beforeOpcode(int) and change to return true even if stack is TOP.

see Using FindBugs for Research to learn lattice and what TOP means.

Specified by:

sawOpcode in class OpcodeStackDetector

See Also:

• OpcodeStackDetector.beforeOpcode(int)

implementsRunnable

boolean implementsRunnable(org.apache.bcel.classfile.JavaClass obj)

extendsThread

boolean extendsThread(org.apache.bcel.classfile.JavaClass obj)