Class ValueRangeAnalysisFactory

java.lang.Object

edu.umd.cs.findbugs.classfile.engine.bcel.ValueRangeAnalysisFactory

All Implemented Interfaces:

IAnalysisEngine<MethodDescriptor, ValueRangeAnalysisFactory.ValueRangeAnalysis>, IMethodAnalysisEngine<ValueRangeAnalysisFactory.ValueRangeAnalysis>

public class ValueRangeAnalysisFactory
extends Object
implements IMethodAnalysisEngine<ValueRangeAnalysisFactory.ValueRangeAnalysis>

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
private static class	ValueRangeAnalysisFactory.BackIterator
private static class	ValueRangeAnalysisFactory.Branch
private static class	ValueRangeAnalysisFactory.Condition
private static class	ValueRangeAnalysisFactory.Context
static class	ValueRangeAnalysisFactory.LongRangeSet
static class	ValueRangeAnalysisFactory.RedundantCondition
private static class	ValueRangeAnalysisFactory.TypeLongRange
private static class	ValueRangeAnalysisFactory.Value
static class	ValueRangeAnalysisFactory.ValueRangeAnalysis
private static class	ValueRangeAnalysisFactory.VariableData

Field Summary

Fields

Modifier and Type	Field	Description
private static final Map<String, ValueRangeAnalysisFactory.TypeLongRange>	typeRanges

Constructor Summary

Constructors

Constructor	Description
ValueRangeAnalysisFactory()

Method Summary

Modifier and Type	Method	Description
ValueRangeAnalysisFactory.ValueRangeAnalysis	analyze(IAnalysisCache analysisCache, MethodDescriptor descriptor)	Perform an analysis on class or method named by given descriptor.
private static String	convertNumber(long val)
private static String	convertNumber(String signature, Number number)
private int	findEndOfAssertBlock(org.apache.bcel.generic.InstructionHandle ih)	Expecting an assert block to look like this: 6 getstatic ghIssues.Issue608.$assertionsDisabled : boolean [7] 9 ifne 0 12 iload_1 [i] // Loading some variable named "i" 13 bipush 12 // Loading a constant 12 15 if_icmplt 0 // Comparing i and 12 18 new java.lang.AssertionError [13] 21 dup 22 ldc invalid input: '<'String "assertion failure message"> [15] 24 invokespecial java.lang.AssertionError(java.lang.Object) [17] 27 athrow
private static Location	getLocation(BasicBlock block)
private static Map<Integer, ValueRangeAnalysisFactory.Value>	getParameterTypes(MethodDescriptor descriptor)
void	registerWith(IAnalysisCache analysisCache)	Register the analysis engine with given analysis cache.
private static void	walkCFG(CFG cfg, ValueRangeAnalysisFactory.LongRangeSet subRange, Map<Edge, ValueRangeAnalysisFactory.Branch> edges, BitSet reachedBlocks)

Methods inherited from class Object

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

Field Details

typeRanges

private static final Map<String, ValueRangeAnalysisFactory.TypeLongRange> typeRanges

Constructor Details

ValueRangeAnalysisFactory

public ValueRangeAnalysisFactory()

Method Details

analyze

public ValueRangeAnalysisFactory.ValueRangeAnalysis analyze(IAnalysisCache analysisCache,
 MethodDescriptor descriptor)
                                                     throws CheckedAnalysisException

Description copied from interface: IAnalysisEngine

Perform an analysis on class or method named by given descriptor.

Specified by:

analyze in interface IAnalysisEngine<MethodDescriptor, ValueRangeAnalysisFactory.ValueRangeAnalysis>

Parameters:

analysisCache - the analysis cache

descriptor - the descriptor of the class or method to be analyzed

Returns:

the result of the analysis of the class or method

Throws:

CheckedAnalysisException

findEndOfAssertBlock

private int findEndOfAssertBlock(org.apache.bcel.generic.InstructionHandle ih)

Expecting an assert block to look like this: 6 getstatic ghIssues.Issue608.$assertionsDisabled : boolean [7]
9 ifne 0
12 iload_1 [i] // Loading some variable named "i"
13 bipush 12 // Loading a constant 12
15 if_icmplt 0 // Comparing i and 12
18 new java.lang.AssertionError [13]
21 dup
22 ldc invalid input: '<'String "assertion failure message"> [15]
24 invokespecial java.lang.AssertionError(java.lang.Object) [17]
27 athrow


Parameters:

ih - The InstructionHandle corresponding to the ifne 0 in the above sample

Returns:

The position for the final athrow

getLocation

private static Location getLocation(BasicBlock block)

convertNumber

private static String convertNumber(String signature,
 Number number)

convertNumber

private static String convertNumber(long val)

getParameterTypes

private static Map<Integer, ValueRangeAnalysisFactory.Value> getParameterTypes(MethodDescriptor descriptor)

walkCFG

private static void walkCFG(CFG cfg,
 ValueRangeAnalysisFactory.LongRangeSet subRange,
 Map<Edge, ValueRangeAnalysisFactory.Branch> edges,
 BitSet reachedBlocks)

registerWith

public void registerWith(IAnalysisCache analysisCache)

Description copied from interface: IAnalysisEngine

Register the analysis engine with given analysis cache.

Specified by:

registerWith in interface IAnalysisEngine<MethodDescriptor, ValueRangeAnalysisFactory.ValueRangeAnalysis>

Parameters:

analysisCache - the analysis cache