The OPAL Framework6.0.0 < Back

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package root
Definition Classes
root
package org
Definition Classes
root
package opalj
OPAL is a Scala-based framework for the static analysis, manipulation and creation of Java bytecode.
OPAL is a Scala-based framework for the static analysis, manipulation and creation of Java bytecode. OPAL is designed with performance, scalability and adaptability in mind.
Its main components are:
- a library (Common) which provides generally useful data-structures and algorithms for static analyses.
- a framework for implementing lattice based static analyses (Static Analysis Infrastructure)
- a framework for parsing Java bytecode (Bytecode Infrastructure - org.opalj.bi) that can be used to create arbitrary representations.
- a library to create a one-to-one in-memory representation of Java bytecode (Bytecode Disassembler - org.opalj.da).
- a library to convert this representation to Java class files (Bytecode Creator - org.opalj.bc).
- a library to create a representation of Java bytecode that facilitates writing simple static analyses (Bytecode Representation - org.opalj.br).
- a library to create a stackless, three-address code representation of Java bytecode that facilitates writing complex static analyses (Three Address Code - org.opalj.tac).
- a scalable, easily customizable framework for the abstract interpretation of Java bytecode (Abstract Interpretation Framework - org.opalj.ai).
- a library to extract dependencies between code elements (Dependencies Extraction - org.opalj.de) and to facilitate checking architecture definitions (Architecture Validation - org.opalj.av).
- a library for the lightweight manipulation and creation of Java bytecode (Bytecode Assembler - org.opalj.ba).
- a library for parsing Android packages (APK - org.opalj.apk).
- libraries for writing static analyses using the interprocedural finite distributive subset (IFDS - org.opalj.ifds) and interprocedural distributive environment (IDE - org.opal.ide) algorithms.
General Design Decisions
Thread Safety
Unless explicitly noted, OPAL is thread safe. I.e., the classes defined by OPAL can be considered to be thread safe unless otherwise stated. (For example, it is possible to read and process class files concurrently without explicit synchronization on the client side.)
No null Values
Unless explicitly noted, OPAL does not null values I.e., fields that are accessible will never contain null values and methods will never return null. If a method accepts null as a value for a parameter or returns a null value it is always explicitly documented. In general, the behavior of methods that are passed null values is undefined unless explicitly documented.
No Typecasts for Collections
For efficiency reasons, OPAL sometimes uses mutable data-structures internally. After construction time, these data-structures are generally represented using their generic interfaces (e.g., scala.collection.{Set,Map}). However, a downcast (e.g., to add/remove elements) is always forbidden as it would effectively prevent thread-safety.
Assertions
OPAL makes heavy use of Scala's Assertion Facility to facilitate writing correct code. Hence, for production builds (after thorough testing(!)) it is highly recommend to build OPAL again using -Xdisable-assertions.
Definition Classes
org
package ai
Implementation of an abstract interpretation (ai) framework.
Implementation of an abstract interpretation (ai) framework.
Please note that the abstract interpreter just refers to the classes and traits defined in this package (ai). The classes and traits defined in the sub-packages (in particular in domain) are not considered to be part of the core of the abstract interpreter.
Definition Classes
opalj
Note
This framework assumes that the analyzed bytecode is valid; i.e., the JVM's bytecode verifier would be able to verify the code. Furthermore, load-time errors (e.g., LinkageErrors) are – by default – completely ignored to facilitate the analysis of parts of a project. In general, if the presented bytecode is not valid, the result is undefined (i.e., OPAL may report meaningless results, crash or run indefinitely).
See also
org.opalj.ai.AI - Implements the abstract interpreter that processes a methods code and uses an analysis-specific domain to perform the abstract computations.
org.opalj.ai.Domain - The core interface between the abstract interpretation framework and the abstract domain that is responsible for performing the abstract computations.
package domain
This package contains definitions of common domains that can be used for the implementation of analyses.
This package contains definitions of common domains that can be used for the implementation of analyses.
Types of Domains
In general, we distinguish two types of domains. First, domains that define a general interface (on top of the one defined by Domain), but do not directly provide an implementation. Hence, whenever you develop a new Domain you should consider implementing/using these domains to maximize reusability. Second, Domains that implement a specific interface (trait). In this case, we further distinguish between domains that provide a default implementation (per interface only one of these Domains can be used to create a final Domain) and those that can be stacked and basically refine the overall functionality.
Examples
- Domains That Define a General Interface
  - Origin defines two types which domains that provide information abou the origin of a value should consider to implement.
  - TheProject defines a standard mechanism how a domain can access the current project.
  - ...
- Domains That Provide a Default Implementation
  - Origin defines the functionality to return a value's origin if the value supports that.
  - org.opalj.ai.domain.TheProject default implementation of the class hierarchy related methods using the project's class hierarchy.
  - org.opalj.ai.domain.DefaultHandlingOfMethodResults basically implements a Domain's methods related to return instructions an uncaught exceptions.
  - ...
- Domains That Implement Stackable Functionality
  - org.opalj.ai.domain.RecordThrownExceptions records information about all uncaught exceptions by intercepting a Domain's respective methods. However, it does provide a default implementation. Hence, a typical pattern is:
```
class MyDomain extends Domain with ...
    with DefaultHandlingOfMethodResults with RecordThrownExceptions
```
Thread Safety
Unless explicitly documented, a domain is never thread-safe. The general programming model is to use one Domain object per code block/method and therefore, thread-safety is not required for Domains that are used for the evaluation of methods. However domains that are used to adapt/transfer values should be thread safe (see org.opalj.ai.domain.ValuesCoordinatingDomain for further details).
Definition Classes
ai
package l0
Definition Classes
domain
package l1
Commonly useful methods.
Commonly useful methods.
Definition Classes
domain
package l2
Definition Classes
domain
package tracing
Definition Classes
domain
AsDomainValue
AsJavaObject
ConcreteIntegerValues
ConcreteLongValues
ConstantFieldValuesResolution
CurrentCode
DefaultExceptionsFactory
DefaultHandlingForReturnInstructions
DefaultHandlingForThrownExceptions
DefaultHandlingOfMethodResults
DefaultHandlingOfVoidReturns
DefaultRecordMethodCallResults
DefaultSpecialDomainValuesBinding
DomainId
DomainValues
GeneralizedArrayHandling
IgnoreSynchronization
ImpossibleRefinement
MethodCallResults
MethodCallsHandling
MonitorInstructionsTracker
Origin
Origins
OriginsIterator
PerInstructionPostProcessing
PerformAI
PostEvaluationMemoryManagement
PredefinedClassHierarchy
RecordAllThrownExceptions
RecordCFG
RecordConstraints
RecordDefUse
RecordJoinedThrownExceptions
RecordLastReturnedValues
RecordMethodCallResults
RecordReturnFromMethodInstructions
RecordReturnedValue
RecordReturnedValueInfrastructure
RecordReturnedValues
RecordReturnedValuesInfrastructure
RecordThrownExceptions
RecordVoidReturns
RefineDefUseUsingOrigins
ReifiedConstraints
ReturnInstructionsDomain
SpecialMethodsHandling
TheCode
TheMethod
TheProject
ThePropertyStore
ThrowAllPotentialExceptionsConfiguration
ThrowNoPotentialExceptionsConfiguration
ValuesCoordinatingDomain

org.opalj.ai.domain

ThrowNoPotentialExceptionsConfiguration

trait ThrowNoPotentialExceptionsConfiguration extends Configuration

A configuration that forces the abstract interpretor to never create an exception if it is not possible to deduce that the specific exception is guaranteed to be thrown.

Usage

If you need to adapt a setting just override the respective method in your domain or create a class that inherits from Configuration.

Core Properties

Concrete base implementation of the Configuration trait that can be used to create a final domain.
Thread safe.

Source: ThrowNoPotentialExceptionsConfiguration.scala

Linear Supertypes

Configuration, AnyRef, Any

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final def !=(arg0: Any): Boolean
Definition Classes
AnyRef → Any
final def ##: Int
Definition Classes
AnyRef → Any
final def ==(arg0: Any): Boolean
Definition Classes
AnyRef → Any
def abortProcessingExceptionsOfCalledMethodsOnUnknownException: Boolean
If true the processing of the exception handlers related to an invoke statement will be aborted if the relation between the type of the thrown exception and the caught type is unknown.
If true the processing of the exception handlers related to an invoke statement will be aborted if the relation between the type of the thrown exception and the caught type is unknown.
returns
true
Definition Classes
ThrowNoPotentialExceptionsConfiguration → Configuration
def abortProcessingThrownExceptionsOnUnknownException: Boolean
If true the processing of the exception handlers related to an athrow statement will be aborted if the relation between the type of the thrown exception and the caught type is unknown.
If true the processing of the exception handlers related to an athrow statement will be aborted if the relation between the type of the thrown exception and the caught type is unknown.
returns
true
Definition Classes
ThrowNoPotentialExceptionsConfiguration → Configuration
final def asInstanceOf[T0]: T0
Definition Classes
Any
def clone(): AnyRef
Attributes
protected[lang]
Definition Classes
AnyRef
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@throws(classOf[java.lang.CloneNotSupportedException]) @native() @IntrinsicCandidate()
final def eq(arg0: AnyRef): Boolean
Definition Classes
AnyRef
def equals(arg0: AnyRef): Boolean
Definition Classes
AnyRef → Any
final def getClass(): Class[_ <: AnyRef]
Definition Classes
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@native() @IntrinsicCandidate()
def hashCode(): Int
Definition Classes
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@native() @IntrinsicCandidate()
final def isInstanceOf[T0]: Boolean
Definition Classes
Any
final def ne(arg0: AnyRef): Boolean
Definition Classes
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final def notify(): Unit
Definition Classes
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@native() @IntrinsicCandidate()
final def notifyAll(): Unit
Definition Classes
AnyRef
Annotations
@native() @IntrinsicCandidate()
final def synchronized[T0](arg0: => T0): T0
Definition Classes
AnyRef
def throwArithmeticExceptions: Boolean
If true, all instructions that may raise an arithmetic exception (e.g., idiv, ldiv) should do so if it is impossible to statically determine that no exception will occur.
If true, all instructions that may raise an arithmetic exception (e.g., idiv, ldiv) should do so if it is impossible to statically determine that no exception will occur. But, if we can statically determine that the operation will raise an exception then the exception will be thrown – independently of this setting. Furthermore, if we can statically determine that no exception will be raised, no exception will be thrown. Hence, this setting only affects computations with values with incomplete information.
returns
false
Definition Classes
ThrowNoPotentialExceptionsConfiguration → Configuration
def throwArrayIndexOutOfBoundsException: Boolean
If true an ArrayIndexOutOfBoundsException is thrown if the index cannot be verified to be valid.
If true an ArrayIndexOutOfBoundsException is thrown if the index cannot be verified to be valid.
returns
false
Definition Classes
ThrowNoPotentialExceptionsConfiguration → Configuration
def throwArrayStoreException: Boolean
If true an ArrayStoreException is thrown if it cannot be verified that the value can be stored in the array.
If true an ArrayStoreException is thrown if it cannot be verified that the value can be stored in the array.
returns
false
Definition Classes
ThrowNoPotentialExceptionsConfiguration → Configuration
def throwClassCastException: Boolean
If true a ClassCastException is thrown by CHECKCAST instructions if it cannot be verified that no ClassCastException will be thrown.
If true a ClassCastException is thrown by CHECKCAST instructions if it cannot be verified that no ClassCastException will be thrown.
returns
false
Definition Classes
ThrowNoPotentialExceptionsConfiguration → Configuration
def throwClassNotFoundException: Boolean
Throw a ClassNotFoundException if the a specific reference type is not known in the current context.
Throw a ClassNotFoundException if the a specific reference type is not known in the current context. The context is typically a specific Project.
returns
false
Definition Classes
ThrowNoPotentialExceptionsConfiguration → Configuration
def throwExceptionsOnMethodCall: ExceptionsRaisedByCalledMethod
Determines the behavior how method calls are handled when the exceptions that the called method may throw are unknown.
Determines the behavior how method calls are handled when the exceptions that the called method may throw are unknown.
returns
ExceptionsRaisedByCalledMethods.Known
Definition Classes
ThrowNoPotentialExceptionsConfiguration → Configuration
def throwIllegalMonitorStateException: Boolean
If true then monitorexit and the (XXX)return instructions will throw IllegalMonitorStateExceptions unless the analysis is able to determine that the exception is guaranteed not to be raised.
If true then monitorexit and the (XXX)return instructions will throw IllegalMonitorStateExceptions unless the analysis is able to determine that the exception is guaranteed not to be raised.
returns
false
Definition Classes
ThrowNoPotentialExceptionsConfiguration → Configuration
def throwNegativeArraySizeException: Boolean
If true a NegativeArraySizeException is thrown if the index cannot be verified to be positive.
If true a NegativeArraySizeException is thrown if the index cannot be verified to be positive.
returns
false
Definition Classes
ThrowNoPotentialExceptionsConfiguration → Configuration
def throwNullPointerExceptionOnArrayAccess: Boolean
Returns true if potential NullPointerExceptions should be thrown and false if such NullPointerExceptions should be ignored.
Returns true if potential NullPointerExceptions should be thrown and false if such NullPointerExceptions should be ignored. However, if the interpreter identifies a situation in which a NullPointerException is guaranteed to be thrown, it will be thrown.
returns
false
Definition Classes
ThrowNoPotentialExceptionsConfiguration → Configuration
def throwNullPointerExceptionOnFieldAccess: Boolean
Returns true if potential NullPointerExceptions should be thrown and false if such NullPointerExceptions should be ignored.
Returns true if potential NullPointerExceptions should be thrown and false if such NullPointerExceptions should be ignored. However, if the interpreter identifies a situation in which a NullPointerException is guaranteed to be thrown, it will be thrown.
returns
false
Definition Classes
ThrowNoPotentialExceptionsConfiguration → Configuration
def throwNullPointerExceptionOnMethodCall: Boolean
Returns true if potential NullPointerExceptions should be thrown and false if such NullPointerExceptions should be ignored.
Returns true if potential NullPointerExceptions should be thrown and false if such NullPointerExceptions should be ignored. However, if the interpreter identifies a situation in which a NullPointerException is guaranteed to be thrown, it will be thrown. Example:
```
def demo(o : Object) {
     o.toString  // - If "true", a NullPointerException will ALSO be thrown;
                 //   the operation also succeeds.
                 // - If "false" the operation will "just" succeed
}
```
returns
false
Definition Classes
ThrowNoPotentialExceptionsConfiguration → Configuration
def throwNullPointerExceptionOnMonitorAccess: Boolean
Returns true if potential NullPointerExceptions should be thrown and false if such NullPointerExceptions should be ignored.
Returns true if potential NullPointerExceptions should be thrown and false if such NullPointerExceptions should be ignored. However, if the interpreter identifies a situation in which a NullPointerException is guaranteed to be thrown, it will be thrown.
returns
false
Definition Classes
ThrowNoPotentialExceptionsConfiguration → Configuration
def throwNullPointerExceptionOnThrow: Boolean
If true a VM level NullPointerExceptions is thrown if the exception that is to be thrown may be null.
If true a VM level NullPointerExceptions is thrown if the exception that is to be thrown may be null.
returns
false
Definition Classes
ThrowNoPotentialExceptionsConfiguration → Configuration
def toString(): String
Definition Classes
AnyRef → Any
final def wait(arg0: Long, arg1: Int): Unit
Definition Classes
AnyRef
Annotations
@throws(classOf[java.lang.InterruptedException])
final def wait(arg0: Long): Unit
Definition Classes
AnyRef
Annotations
@throws(classOf[java.lang.InterruptedException])
final def wait(): Unit
Definition Classes
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Annotations
@throws(classOf[java.lang.InterruptedException])

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def finalize(): Unit
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protected[lang]
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@throws(classOf[java.lang.Throwable]) @Deprecated @Deprecated
Deprecated

Packages

General Design Decisions

Thread Safety

No `null` Values

No Typecasts for Collections

Assertions

Types of Domains

Thread Safety

ThrowNoPotentialExceptionsConfiguration

trait ThrowNoPotentialExceptionsConfiguration extends Configuration

Usage

Core Properties

Value Members

Deprecated Value Members

Inherited from Configuration

Inherited from AnyRef

Inherited from Any

Ungrouped

Packages

General Design Decisions

Thread Safety

No null Values

No Typecasts for Collections

Assertions

Types of Domains

Thread Safety

ThrowNoPotentialExceptionsConfiguration

trait ThrowNoPotentialExceptionsConfiguration extends Configuration

Usage

Core Properties

Value Members

Deprecated Value Members

Inherited from Configuration

Inherited from AnyRef

Inherited from Any

Ungrouped

No `null` Values

ThrowNoPotentialExceptionsConfiguration