Packages

  • 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) that can be used to create arbitrary representations.
    • a library to create a one-to-one in-memory representation of Java bytecode (Bytecode Disassembler).
    • a library to create a representation of Java bytecode that facilitates writing simple static analyses (Bytecode Representation - org.opalj.br).
    • 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 and to facilitate checking architecture definitions.
    • a library for the lightweight manipulation and creation of Java bytecode (Bytecode Assembler).

    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 – also referred to as OPAL.

    Implementation of an abstract interpretation (ai) framework – also referred to as OPAL.

    Please note that OPAL/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 OPAL/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
    • 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 l1

    Commonly useful methods.

    Commonly useful methods.

    Definition Classes
    domain
  • ArrayValues
  • ClassValues
  • ConcreteArrayValues
  • ConcretePrimitiveValuesConversions
  • ConstraintsBetweenIntegerValues
  • DefaultArrayValuesBinding
  • DefaultClassValuesBinding
  • DefaultConcreteArrayValuesBinding
  • DefaultDomain
  • DefaultDomainWithCFG
  • DefaultDomainWithCFGAndDefUse
  • DefaultIntegerRangeValues
  • DefaultIntegerSetValues
  • DefaultIntegerValues
  • DefaultIntervalValuesDomain
  • DefaultJavaObjectToDomainValueConversion
  • DefaultLongSetValues
  • DefaultLongValues
  • DefaultReferenceValuesBinding
  • DefaultReferenceValuesDomain
  • DefaultReferenceValuesDomainWithCFGAndDefUse
  • DefaultSetValuesDomain
  • DefaultSingletonValuesDomain
  • DefaultStringValuesBinding
  • IntegerRangeValues
  • IntegerSetValues
  • IntegerValues
  • LongSetValues
  • LongSetValuesShiftOperators
  • LongValues
  • LongValuesShiftOperators
  • MaxArrayLengthRefinement
  • NullPropertyRefinement
  • RecordAllThrownExceptions
  • ReferenceValues
  • ReflectiveInvoker
  • StringBuilderValues
  • StringValues
c

org.opalj.ai.domain.l1

DefaultIntervalValuesDomain

class DefaultIntervalValuesDomain[Source] extends CorrelationalDomain with TheProject with TheMethod with DefaultSpecialDomainValuesBinding with ThrowAllPotentialExceptionsConfiguration with DefaultHandlingOfMethodResults with IgnoreSynchronization with DefaultTypeLevelFloatValues with DefaultTypeLevelDoubleValues with TypeLevelFieldAccessInstructions with TypeLevelInvokeInstructions with TypeLevelDynamicLoads with l0.DefaultReferenceValuesBinding with DefaultIntegerRangeValues with ConstraintsBetweenIntegerValues with DefaultLongValues with LongValuesShiftOperators with ConcretePrimitiveValuesConversions

This domain uses the l1 level stable domains which handle primitive values using intervals/ranges.

Source
DefaultIntervalValuesDomain.scala
Linear Supertypes
ConcretePrimitiveValuesConversions, TypeLevelPrimitiveValuesConversions, LongValuesShiftOperators, DefaultLongValues, LongValues, ConcreteLongValues, ConstraintsBetweenIntegerValues, TheCodeStructure, DefaultIntegerRangeValues, IntegerRangeValues, ConcreteIntegerValues, IntegerRangeValuesFactory, l0.DefaultReferenceValuesBinding, DefaultExceptionsFactory, DefaultTypeLevelReferenceValues, TypeLevelReferenceValues, AsJavaObject, GeneralizedArrayHandling, TypeLevelDynamicLoads, TypeLevelInvokeInstructions, MethodCallsHandling, TypeLevelFieldAccessInstructions, DefaultTypeLevelDoubleValues, TypeLevelDoubleValues, DefaultTypeLevelFloatValues, TypeLevelFloatValues, IgnoreSynchronization, DefaultHandlingOfMethodResults, DefaultHandlingForReturnInstructions, DefaultHandlingOfVoidReturns, DefaultHandlingForThrownExceptions, ReturnInstructionsDomain, ThrowAllPotentialExceptionsConfiguration, DefaultSpecialDomainValuesBinding, TheMethod, TheCode, TheProject, LogContextProvider, ThePropertyStore, CorrelationalDomain, CorrelationalDomainSupport, IdentityBasedCorrelationChangeDetection, JoinStabilization, Domain, Configuration, TypedValuesFactory, PrimitiveValuesConversionsDomain, DynamicLoadsDomain, ai.ReturnInstructionsDomain, MonitorInstructionsDomain, MethodCallsDomain, FieldAccessesDomain, ReferenceValuesDomain, ReferenceValuesFactory, ExceptionsFactory, DoubleValuesDomain, DoubleValuesFactory, FloatValuesDomain, FloatValuesFactory, LongValuesDomain, LongValuesFactory, IntegerValuesDomain, IntegerValuesFactory, CoreDomainFunctionality, SubroutinesDomain, ValuesDomain, AnyRef, Any
Ordering
  1. Alphabetic
  2. By Inheritance
Inherited
  1. DefaultIntervalValuesDomain
  2. ConcretePrimitiveValuesConversions
  3. TypeLevelPrimitiveValuesConversions
  4. LongValuesShiftOperators
  5. DefaultLongValues
  6. LongValues
  7. ConcreteLongValues
  8. ConstraintsBetweenIntegerValues
  9. TheCodeStructure
  10. DefaultIntegerRangeValues
  11. IntegerRangeValues
  12. ConcreteIntegerValues
  13. IntegerRangeValuesFactory
  14. DefaultReferenceValuesBinding
  15. DefaultExceptionsFactory
  16. DefaultTypeLevelReferenceValues
  17. TypeLevelReferenceValues
  18. AsJavaObject
  19. GeneralizedArrayHandling
  20. TypeLevelDynamicLoads
  21. TypeLevelInvokeInstructions
  22. MethodCallsHandling
  23. TypeLevelFieldAccessInstructions
  24. DefaultTypeLevelDoubleValues
  25. TypeLevelDoubleValues
  26. DefaultTypeLevelFloatValues
  27. TypeLevelFloatValues
  28. IgnoreSynchronization
  29. DefaultHandlingOfMethodResults
  30. DefaultHandlingForReturnInstructions
  31. DefaultHandlingOfVoidReturns
  32. DefaultHandlingForThrownExceptions
  33. ReturnInstructionsDomain
  34. ThrowAllPotentialExceptionsConfiguration
  35. DefaultSpecialDomainValuesBinding
  36. TheMethod
  37. TheCode
  38. TheProject
  39. LogContextProvider
  40. ThePropertyStore
  41. CorrelationalDomain
  42. CorrelationalDomainSupport
  43. IdentityBasedCorrelationChangeDetection
  44. JoinStabilization
  45. Domain
  46. Configuration
  47. TypedValuesFactory
  48. PrimitiveValuesConversionsDomain
  49. DynamicLoadsDomain
  50. ReturnInstructionsDomain
  51. MonitorInstructionsDomain
  52. MethodCallsDomain
  53. FieldAccessesDomain
  54. ReferenceValuesDomain
  55. ReferenceValuesFactory
  56. ExceptionsFactory
  57. DoubleValuesDomain
  58. DoubleValuesFactory
  59. FloatValuesDomain
  60. FloatValuesFactory
  61. LongValuesDomain
  62. LongValuesFactory
  63. IntegerValuesDomain
  64. IntegerValuesFactory
  65. CoreDomainFunctionality
  66. SubroutinesDomain
  67. ValuesDomain
  68. AnyRef
  69. Any
  1. Hide All
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Visibility
  1. Public
  2. Protected

Instance Constructors

  1. new DefaultIntervalValuesDomain(project: Project[Source], method: Method)

Type Members

  1. trait RETValue extends Value with IsReturnAddressValue
    Definition Classes
    ValuesDomain
  2. trait ReferenceValue extends TypedValue[ReferenceType] with IsReferenceValue
    Definition Classes
    ValuesDomain
  3. class ReturnAddressValue extends RETValue

    Stores a single return address (i.e., a program counter/index into the code array).

    Stores a single return address (i.e., a program counter/index into the code array).

    Definition Classes
    ValuesDomain
    Note

    Though the framework completely handles all aspects related to return address values, it is nevertheless necessary that this class inherits from Value as return addresses are stored on the stack/in the registers. However, if the Value trait should be refined, all additional methods may – from the point-of-view of OPAL-AI – just throw an UnsupportedOperationException as these additional methods will never be called by the OPAL-AI.

  4. class ReturnAddressValues extends RETValue

    A collection of (not further stored) return address values.

    A collection of (not further stored) return address values. Primarily used when we join the executions of subroutines.

    Definition Classes
    ValuesDomain
  5. trait TypedValue[+T <: Type] extends Value with KnownTypedValue
    Definition Classes
    ValuesDomain
  6. trait Value extends ValueInformation

    Abstracts over a concrete operand stack value or a value stored in one of the local variables/registers.

    Abstracts over a concrete operand stack value or a value stored in one of the local variables/registers.

    Use Of Value/Dependencies On Value

    In general, subclasses and users of a Domain should not have/declare a direct dependency on Value. Instead they should use DomainValue as otherwise extensibility of a Domain may be hampered or even be impossible. The only exceptions are, of course, classes that directly inherit from this class.

    Refining Value

    If you directly extend/refine this trait (i.e., in a subclass of the Domain trait you write something like trait Value extends super.Value), make sure that you also extend all classes/traits that inherit from this type (this may require a deep mixin composition and that you refine the type DomainType accordingly). However, OPAL was designed such that extending this class should – in general – not be necessary. It may also be easier to encode the desired semantics – as far as possible – as part of the domain.

    Implementing Value

    Standard inheritance from this trait is always supported and is the primary mechanism to model an abstract domain's lattice w.r.t. some special type of value. In general, the implementation should try to avoid creating new instances of values unless strictly required to model the domain's semantics. This will greatly improve the overall performance as this framework heavily uses reference-based equality checks to speed up the evaluation.

    Definition Classes
    ValuesDomain
    Note

    OPAL does not rely on any special equality semantics w.r.t. values and never directly or indirectly calls a Value's equals method. Hence, a domain can encode equality such that it best fits its need. However, some of the provided domains rely on the following semantics for equals: Two domain values have to be equal (==) iff they represent the same information. This includes additional information, such as, the value of the origin. E.g., a value (AnIntegerValue) that represents an arbitrary Integer value has to return true if the domain value with which it is compared also represents an arbitrary Integer value (AnIntegerValue). However, it may still be necessary to use multiple objects to represent an arbitrary integer value if, e.g., constraints should be attached to specific values. For example, after a comparison of an integer value with a predefined value (e.g., AnIntegerValue < 4) it is possible to constrain the respective value on the subsequent paths (< 4 on one path and >= 4 on the other path). To make that possible, it is however necessary to distinguish the AnIntegervalue from some other AnIntegerValue to avoid constraining unrelated values.

    public void foo(int a,int b) {
    if(a < 4) {
        z = a - 2 // here a is constrained (< 4), b and z are unconstrained
    }
    else {
        z = a + 2 // here a is constrained (>= 4), b and z are unconstrained
    }
}

    In general, equals is only defined for values belonging to the same domain. If values need to be compared across domains, they need to be adapted to a target domain first.

  7. trait DoubleValue extends (TypeLevelDoubleValues.this)#TypedValue[DoubleType] with IsDoubleValue

    Abstracts over double values at the type level.

    Abstracts over double values at the type level.

    Definition Classes
    TypeLevelDoubleValues
  8. trait FloatValue extends (TypeLevelFloatValues.this)#TypedValue[FloatType] with IsFloatValue

    Abstracts over all values with computational type float.

    Abstracts over all values with computational type float.

    Definition Classes
    TypeLevelFloatValues
  9. trait ArrayAbstraction extends AnyRef
    Definition Classes
    TypeLevelReferenceValues
  10. trait ReferenceValueLike extends (TypeLevelReferenceValues.this)#ReferenceValue with (TypeLevelReferenceValues.this)#ArrayAbstraction

    Abstracts over all values with computational type reference.

    Abstracts over all values with computational type reference. I.e., abstracts over class and array values and also the null value.

    Definition Classes
    TypeLevelReferenceValues
  11. class AnIntegerValue extends (DefaultIntegerRangeValues.this)#AnIntegerValueLike

    Represents a specific but unknown Integer value.

    Represents a specific but unknown Integer value.

    Definition Classes
    DefaultIntegerRangeValues
    Note

    The functionality to propagate a constraint crucially depends on the fact that two integer values that are not guaranteed to represent the same runtime value are represented by two different instances of "AnIntegerValue"; otherwise, propagating the constraint that some value (after some kind of check) has to have a special value may affect unrelated values!

  12. class IntegerRange extends (DefaultIntegerRangeValues.this)#IntegerRangeLike

    Represents a specific integer value in the range [lowerBound,upperBound].

    Represents a specific integer value in the range [lowerBound,upperBound].

    Definition Classes
    DefaultIntegerRangeValues
  13. type AReferenceValue = ReferenceValueLike
    Definition Classes
    DefaultReferenceValuesBinding → TypeLevelReferenceValues
  14. type ArrayLoadResult = Computation[DomainValue, ExceptionValues]

    Computation that returns the value stored in an array at a given index or an exception.

    Computation that returns the value stored in an array at a given index or an exception. The exceptions that may be thrown are: NullPointerException and ArrayIndexOutOfBoundsException.

    Definition Classes
    ReferenceValuesDomain
  15. type ArrayStoreResult = Computation[Nothing, ExceptionValues]

    Computation that succeeds (updates the value stored in the array at the given index) or that throws an exception.

    Computation that succeeds (updates the value stored in the array at the given index) or that throws an exception. The exceptions that may be thrown are: NullPointerException, ArrayIndexOutOfBoundsException and ArrayStoreException.

    Definition Classes
    ReferenceValuesDomain
  16. type Constraint = constraints.NumericConstraints.Value
    Definition Classes
    ConstraintsBetweenIntegerValues
  17. type ConstraintsStore = IdentityHashMap[IntegerLikeValue, IdentityHashMap[IntegerLikeValue, Constraint]]
    Definition Classes
    ConstraintsBetweenIntegerValues
  18. type DomainArrayValue = AnArrayValue
    Definition Classes
    DefaultReferenceValuesBinding → DefaultTypeLevelReferenceValues → TypeLevelReferenceValues
  19. final type DomainIllegalValue = IllegalValue

    Abstracts over the concrete type of IllegalValue.

    Abstracts over the concrete type of IllegalValue.

    This type needs to be refined whenever the class IllegalValue is refined or the type DomainValue is refined.

    Definition Classes
    DefaultSpecialDomainValuesBinding → ValuesDomain
  20. type DomainNullValue = ANullValue
    Definition Classes
    DefaultReferenceValuesBinding → DefaultTypeLevelReferenceValues → TypeLevelReferenceValues
  21. type DomainObjectValue = AnObjectValue
    Definition Classes
    DefaultReferenceValuesBinding → DefaultTypeLevelReferenceValues → TypeLevelReferenceValues
  22. type DomainReferenceValue = ReferenceValueLike
    Definition Classes
    DefaultReferenceValuesBinding → ValuesDomain
  23. final type DomainReturnAddressValue = ReturnAddressValue

    Abstracts over the concrete type of ReturnAddressValue.

    Abstracts over the concrete type of ReturnAddressValue. Needs to be fixed by some sub-trait/sub-class. In the simplest case (i.e., when neither the Value trait nor the ReturnAddressValue trait was refined) it is sufficient to write:

    type DomainReturnAddressValue = ReturnAddressValue
    Definition Classes
    DefaultSpecialDomainValuesBinding → ValuesDomain
  24. final type DomainReturnAddressValues = ReturnAddressValues
    Definition Classes
    DefaultSpecialDomainValuesBinding → ValuesDomain
  25. final type DomainTypedValue[+T <: Type] = TypedValue[T]
    Definition Classes
    DefaultSpecialDomainValuesBinding → ValuesDomain
  26. final type DomainValue = Value

    Abstracts over the concrete type of Value.

    Abstracts over the concrete type of Value. Needs to be refined by traits that inherit from Domain and which extend Domain's Value trait.

    Definition Classes
    DefaultSpecialDomainValuesBinding → ValuesDomain
  27. type ExceptionValue = DomainReferenceValue

    A simple type alias of the type DomainValue; used to facilitate comprehension.

    A simple type alias of the type DomainValue; used to facilitate comprehension.

    Definition Classes
    ValuesDomain
  28. type ExceptionValues = Iterable[ExceptionValue]

    A type alias for Iterables of ExceptionValues; used to facilitate comprehension.

    A type alias for Iterables of ExceptionValues; used to facilitate comprehension.

    Definition Classes
    ValuesDomain
  29. type IntegerValueOrArithmeticException = Computation[DomainValue, ExceptionValue]

    Computation that returns a numeric value or an ObjectType.ArithmeticException.

    Computation that returns a numeric value or an ObjectType.ArithmeticException.

    Definition Classes
    IntegerValuesDomain
  30. type Locals = collection.mutable.Locals[DomainValue]

    An instruction's current register values/locals are represented using an array.

    An instruction's current register values/locals are represented using an array.

    Definition Classes
    ValuesDomain
  31. type LocalsArray = Array[Locals]
    Definition Classes
    ValuesDomain
  32. type LongValueOrArithmeticException = Computation[DomainValue, ExceptionValue]
    Definition Classes
    LongValuesDomain
  33. type MethodCallResult = Computation[DomainValue, ExceptionValues]
    Definition Classes
    MethodCallsDomain
  34. type Operands = List[DomainValue]

    An instruction's operands are represented using a list where the first element of the list represents the top level operand stack value.

    An instruction's operands are represented using a list where the first element of the list represents the top level operand stack value.

    Definition Classes
    ValuesDomain
  35. type OperandsArray = Array[Operands]
    Definition Classes
    ValuesDomain
  36. class ConcreteLongValue extends (DefaultLongValues.this)#TheLongValue

    Represents a concrete long value.

    Represents a concrete long value.

    Definition Classes
    DefaultLongValues
  37. trait AnIntegerValueLike extends (IntegerRangeValues.this)#IntegerLikeValue

    Represents an (unknown) integer value.

    Represents an (unknown) integer value.

    Models the top value of this domain's lattice.

    Definition Classes
    IntegerRangeValues
  38. sealed trait IntegerLikeValue extends (IntegerRangeValues.this)#TypedValue[CTIntType] with IsIntegerValue

    Abstracts over all values with computational type integer.

    Abstracts over all values with computational type integer.

    Definition Classes
    IntegerRangeValues
  39. abstract class IntegerRangeLike extends (IntegerRangeValues.this)#IntegerLikeValue

    Represents a range of integer values.

    Represents a range of integer values. The range's bounds are inclusive. Unless a range has only one value it is impossible to tell whether or not a value that is in the range will potentially occur at runtime.

    Definition Classes
    IntegerRangeValues
  40. trait ALongValue extends (LongValues.this)#LongValue

    Represents an (unknown) long value.

    Represents an (unknown) long value.

    Models the top value of this domain's lattice.

    Definition Classes
    LongValues
  41. sealed trait LongValue extends (LongValues.this)#TypedValue[LongType] with IsLongValue

    Abstracts over all values with computational type long.

    Abstracts over all values with computational type long.

    Definition Classes
    LongValues
  42. trait TheLongValue extends (LongValues.this)#LongValue

    Represents one concrete long value.

    Represents one concrete long value.

    Definition Classes
    LongValues

Value Members

  1. object ConcreteIntegerValue
    Definition Classes
    ConcreteIntegerValues
  2. object ConcreteLongValue
    Definition Classes
    ConcreteLongValues
  3. case object ADoubleValue extends (DefaultTypeLevelDoubleValues.this)#DoubleValue with Product with Serializable

    Represents an unknown double value.

    Represents an unknown double value.

    Definition Classes
    DefaultTypeLevelDoubleValues
  4. case object AFloatValue extends (DefaultTypeLevelFloatValues.this)#FloatValue with Product with Serializable
    Definition Classes
    DefaultTypeLevelFloatValues
  5. object AnArrayValue

    Enables matching of DomainValues that are array values.

    Enables matching of DomainValues that are array values.

    Definition Classes
    DefaultTypeLevelReferenceValues
  6. object MObjectValueLike
    Definition Classes
    DefaultTypeLevelReferenceValues
  7. object SObjectValueLike
    Definition Classes
    DefaultTypeLevelReferenceValues
  8. object IsNull
    Definition Classes
    TypeLevelReferenceValues
  9. object IsPrecise
    Definition Classes
    TypeLevelReferenceValues
  10. object UpperTypeBound
    Definition Classes
    TypeLevelReferenceValues
  11. def AnIntegerValue(): AnIntegerValue

    Factory method to create a new instance of AnIntegerValue.

    Factory method to create a new instance of AnIntegerValue.

    Definition Classes
    DefaultIntegerRangeValues
  12. final def ArithmeticException(origin: ValueOrigin): ExceptionValue

    Creates a non-null object that represent a ArithmeticException and that has the given origin.

    Creates a non-null object that represent a ArithmeticException and that has the given origin. If the ArithmeticException was created by the VM while evaluating an instruction with the program counter pc you use the method ValueOriginForImmediateVMException to translate that pc to the appropriate ValueOrigin.

    Definition Classes
    DefaultExceptionsFactory → ExceptionsFactory
  13. final def ArrayIndexOutOfBoundsException(origin: ValueOrigin): ExceptionValue

    Creates a non-null object that represent a ArrayIndexOutOfBoundsException and that has the given origin.

    Creates a non-null object that represent a ArrayIndexOutOfBoundsException and that has the given origin. If the ArrayIndexOutOfBoundsException was created by the VM while evaluating an instruction with the program counter pc you use the method ValueOriginForImmediateVMException to translate that pc to the appropriate ValueOrigin.

    Definition Classes
    DefaultExceptionsFactory → ExceptionsFactory
  14. final def ArrayStoreException(origin: ValueOrigin): ExceptionValue

    Creates a non-null object that represent a ArrayStoreException and that has the given origin.

    Creates a non-null object that represent a ArrayStoreException and that has the given origin. If the ArrayStoreException was created by the VM while evaluating an instruction with the program counter pc you use the method ValueOriginForImmediateVMException to translate that pc to the appropriate ValueOrigin.

    Definition Classes
    DefaultExceptionsFactory → ExceptionsFactory
  15. def ArrayValue(origin: ValueOrigin, arrayType: ArrayType): DomainArrayValue

    Creates a new DomainValue that represents an array value with unknown values and where the specified type may also just be an upper type bound (unless the component type is a primitive type or an array of primitives.)

    Creates a new DomainValue that represents an array value with unknown values and where the specified type may also just be an upper type bound (unless the component type is a primitive type or an array of primitives.)

    Typical Usage

    This factory method is (typically) used to create a domain value that represents an array if we know nothing specific about the array. E.g., if you want to analyze a method that takes an array as a parameter.

    Summary

    The properties of the value are:

    • Type: Upper Bound (unless the elementType is a base type)
    • Null: Unknown
    • Size: Unknown
    • Content: Unknown
    Definition Classes
    DefaultReferenceValuesBinding → TypeLevelReferenceValues
    Note

    Java's arrays are co-variant. I.e., Object[] a = new Serializable[100]; is valid.

  16. def BooleanValue(origin: ValueOrigin, value: Boolean): DomainTypedValue[CTIntType]

    Factory method to create a representation of a boolean value with the given initial value and origin.

    Factory method to create a representation of a boolean value with the given initial value and origin.

    The domain may ignore the information about the value and the origin (origin).

    Definition Classes
    DefaultIntegerRangeValues → IntegerValuesFactory
  17. def BooleanValue(origin: ValueOrigin): DomainTypedValue[CTIntType]

    Factory method to create a representation of a boolean value if we know the origin of the value.

    Factory method to create a representation of a boolean value if we know the origin of the value.

    The domain may ignore the information about the origin (origin).

    Definition Classes
    DefaultIntegerRangeValues → IntegerValuesFactory
  18. def ByteValue(origin: ValueOrigin, value: Byte): DomainTypedValue[CTIntType]

    Factory method to create a DomainValue that represents the given byte value and that was created (explicitly or implicitly) by the instruction with the specified program counter.

    Factory method to create a DomainValue that represents the given byte value and that was created (explicitly or implicitly) by the instruction with the specified program counter.

    The domain may ignore the information about the value and the origin (origin).

    Definition Classes
    DefaultIntegerRangeValues → IntegerValuesFactory
  19. def ByteValue(origin: ValueOrigin): DomainTypedValue[CTIntType]

    Factory method to create a DomainValue that was created (explicitly or implicitly) by the instruction with the specified program counter.

    Factory method to create a DomainValue that was created (explicitly or implicitly) by the instruction with the specified program counter.

    The domain may ignore the information about the origin (origin).

    Definition Classes
    DefaultIntegerRangeValues → IntegerValuesFactory
  20. def CharValue(origin: ValueOrigin, value: Char): DomainTypedValue[CTIntType]

    Factory method to create a DomainValue that represents the given char value and that was created (explicitly or implicitly) by the instruction with the specified program counter.

    Factory method to create a DomainValue that represents the given char value and that was created (explicitly or implicitly) by the instruction with the specified program counter.

    Definition Classes
    DefaultIntegerRangeValues → IntegerValuesFactory
  21. def CharValue(origin: ValueOrigin): DomainTypedValue[CTIntType]

    Factory method to create a DomainValue that was created (explicitly or implicitly) by the instruction with the specified program counter.

    Factory method to create a DomainValue that was created (explicitly or implicitly) by the instruction with the specified program counter.

    The domain may ignore the information about the origin (origin).

    Definition Classes
    DefaultIntegerRangeValues → IntegerValuesFactory
  22. final def ClassCastException(origin: ValueOrigin): ExceptionValue

    Creates a non-null object that represent a ClassCastException and that has the given origin.

    Creates a non-null object that represent a ClassCastException and that has the given origin. If the ClassCastException was created by the VM while evaluating an instruction with the program counter pc you use the method ValueOriginForImmediateVMException to translate that pc to the appropriate ValueOrigin.

    Definition Classes
    DefaultExceptionsFactory → ExceptionsFactory
  23. final def ClassNotFoundException(origin: ValueOrigin): ExceptionValue
    Definition Classes
    DefaultExceptionsFactory → ExceptionsFactory
  24. def ClassValue(pc: Int, t: Type): DomainObjectValue

    Factory method to create a DomainValue that represents a runtime value of type "Class<T>" and that was created by the instruction with the specified program counter.

    Factory method to create a DomainValue that represents a runtime value of type "Class<T>" and that was created by the instruction with the specified program counter.

    This function is called by OPAL when a class constant (LDC(_W) instruction) is put on the stack.

    The domain may ignore the information about the value and the origin (vo).

    Summary

    The properties of the domain value are:

    • Initialized: Yes and the type represented by the class is the given type.
    • Type: java.lang.Class<t:Type>
    • Null: No
    Definition Classes
    TypeLevelReferenceValues → ReferenceValuesFactory
  25. final def ConstantFieldValue(pc: Int, cv: ConstantFieldValue[_]): DomainValue

    Creates the domain value that represents the constant field value.

    Creates the domain value that represents the constant field value.

    Definition Classes
    Domain
  26. final def DefaultValue(origin: ValueOrigin, theType: FieldType): DomainValue

    Creates a DomainValue that represents a value with the given type and which is initialized using the JVM's default value for that type.

    Creates a DomainValue that represents a value with the given type and which is initialized using the JVM's default value for that type. E.g., for IntegerValues the value is set to 0. In case of a ReferenceType the value is the ReferenceValuesFactory#NullValue.

    Definition Classes
    TypedValuesFactory
  27. final val DomainReferenceValueTag: ClassTag[DomainReferenceValue]

    The class tag can be used to create type safe arrays or to extract the concrete type of the domain value.

    The class tag can be used to create type safe arrays or to extract the concrete type of the domain value.

    val DomainReferenceValue(v) = value // of type "DomainValue"
// v is now of the type DomainReferenceValue
    Definition Classes
    DefaultReferenceValuesBinding → ValuesDomain
  28. final val DomainValueTag: ClassTag[DomainValue]

    The class tag for the type DomainValue.

    The class tag for the type DomainValue.

    Required to generate instances of arrays in which values of type DomainValue can be stored in a type-safe manner.

    Initialization

    In the sub-trait or class that fixes the type of DomainValue it is necessary to implement this abstract val using:

    val DomainValueTag : ClassTag[DomainValue] = implicitly

    (As of Scala 2.10 it is necessary that you do not use implicit in the subclass - it will compile, but fail at runtime.)

    Definition Classes
    DefaultSpecialDomainValuesBinding → ValuesDomain
  29. final def DoubleValue(valueOrigin: Int, value: Double): DoubleValue

    Factory method to create a DomainValue that represents the given double value and that was created (explicitly or implicitly) by the instruction with the specified program counter.

    Factory method to create a DomainValue that represents the given double value and that was created (explicitly or implicitly) by the instruction with the specified program counter.

    The domain may ignore the information about the value and the origin (vo).

    Definition Classes
    DefaultTypeLevelDoubleValues → DoubleValuesFactory
  30. final def DoubleValue(valueOrigin: Int): DoubleValue

    Factory method to create a DomainValue that was created (explicitly or implicitly) by the instruction with the specified program counter, but where we have no knowledge about the precise value.

    Factory method to create a DomainValue that was created (explicitly or implicitly) by the instruction with the specified program counter, but where we have no knowledge about the precise value.

    The domain may ignore the information about the origin (vo).

    Definition Classes
    DefaultTypeLevelDoubleValues → DoubleValuesFactory
  31. def FloatValue(valueOrigin: Int, value: Float): FloatValue

    Factory method to create a DomainValue with the specified origin.

    Factory method to create a DomainValue with the specified origin. The origin is typically the program counter of the instruction that created this value/where the value was observed for the first time.

    The domain may ignore the information about the origin (origin).

    Definition Classes
    DefaultTypeLevelFloatValues → FloatValuesFactory
  32. def FloatValue(valueOrigin: Int): FloatValue

    Factory method to create a DomainValue with the specified origin.

    Factory method to create a DomainValue with the specified origin. The origin is typically the program counter of the instruction that created this value/where the value was observed for the first time.

    The domain may ignore the information about the origin (origin).

    Definition Classes
    DefaultTypeLevelFloatValues → FloatValuesFactory
  33. final def IllegalMonitorStateException(origin: ValueOrigin): ExceptionValue

    Creates a non-null object that represent an IllegalMonitorStateException and that has the given origin.

    Creates a non-null object that represent an IllegalMonitorStateException and that has the given origin. If the IllegalMonitorStateException was created by the VM while evaluating an instruction with the program counter pc you should use the method ValueOriginForImmediateVMException to translate that pc to the appropriate ValueOrigin.

    Definition Classes
    DefaultExceptionsFactory → ExceptionsFactory
  34. def InitializedDomainValue(origin: ValueOrigin, vi: ValueInformation): DomainValue

    Creates a domain value from the given value information that represents a properly domain value.

    Creates a domain value from the given value information that represents a properly domain value. A representation of a proper value is created even if the value information is provided for an uninitialized value.

    Definition Classes
    TypeLevelReferenceValues → ValuesDomain
    Note

    This function is only defined for proper values, i.e., it is not defined for void values or illegal values.

    ,

    This method is intended to be overwritten by concrete domains which can represent more information.

  35. def InitializedObjectValue(pc: Int, objectType: ObjectType): DomainObjectValue

    Factory method to create a DomainValue that represents an initialized reference value of the given type and that was created (explicitly or implicitly) by the instruction with the specified program counter.

    Factory method to create a DomainValue that represents an initialized reference value of the given type and that was created (explicitly or implicitly) by the instruction with the specified program counter.

    General Remarks

    The given type usually identifies a class type (not an interface type) that is not abstract, but in some cases (e.g. consider java.awt.Toolkit()) it may be useful/meaningful to relax this requirement and to state that the class precisely represents the runtime type – even so the class is abstract. However, such decisions need to be made by the domain.

    This method is used by the OPAL framework to create reference values that are normally internally created by the JVM (in particular exceptions such as NullPointerException and ClassCastException). However, it can generally be used to create initialized objects/arrays.

    Summary

    The properties of the domain value are:

    • Initialized: Yes
    • Type: precise (i.e., this type is not an upper bound, the type correctly models the runtime type.)
    • Null: No (This value is not null.)
    Definition Classes
    TypeLevelReferenceValues → ReferenceValuesFactory
  36. final def IntegerConstant0: DomainTypedValue[CTIntType]

    Factory method to create a representation of the integer constant value 0.

    Factory method to create a representation of the integer constant value 0.

    OPAL in particular uses this special value for performing subsequent computations against the fixed value 0 (e.g., for if_XX instructions).

    (The origin (ValueOrigin) that is used is the ConstantValueOrigin to signify that this value was not created by the program.)

    The domain may ignore the information about the value.

    Definition Classes
    IntegerValuesFactory
  37. final def IntegerRange(lb: Int, ub: Int): IntegerRange

    Creates a new IntegerRange value with the given bounds.

    Creates a new IntegerRange value with the given bounds.

    Definition Classes
    DefaultIntegerRangeValues → IntegerRangeValues
    Annotations
    @inline()
  38. final def IntegerRange(origin: ValueOrigin, lowerBound: Int, upperBound: Int): DomainTypedValue[CTIntType]

    Creates a new IntegerRange value with the given bounds.

    Creates a new IntegerRange value with the given bounds.

    Definition Classes
    IntegerRangeValues → IntegerRangeValuesFactory
  39. def IntegerRange(value: Int): DomainTypedValue[CTIntType]

    Creates a new IntegerRange value with the lower and upper bound set to the given value.

    Creates a new IntegerRange value with the lower and upper bound set to the given value.

    Definition Classes
    IntegerRangeValues
  40. def IntegerValue(origin: ValueOrigin, value: Int): DomainTypedValue[CTIntType]

    Factory method to create a DomainValue that represents the given integer value and that was created (explicitly or implicitly) by the instruction with the specified program counter.

    Factory method to create a DomainValue that represents the given integer value and that was created (explicitly or implicitly) by the instruction with the specified program counter.

    The domain may ignore the information about the value and the origin (origin).

    Definition Classes
    DefaultIntegerRangeValues → IntegerValuesFactory
  41. def IntegerValue(origin: ValueOrigin): DomainTypedValue[CTIntType]

    Factory method to create a DomainValue that was created (explicitly or implicitly) by the instruction with the specified program counter.

    Factory method to create a DomainValue that was created (explicitly or implicitly) by the instruction with the specified program counter.

    The domain may ignore the information about the origin (origin).

    Definition Classes
    DefaultIntegerRangeValues → IntegerValuesFactory
  42. def LongValue(origin: ValueOrigin, value: Long): ConcreteLongValue

    Factory method to create a DomainValue that represents the given long value and that was created (explicitly or implicitly) by the instruction with the specified program counter.

    Factory method to create a DomainValue that represents the given long value and that was created (explicitly or implicitly) by the instruction with the specified program counter.

    The domain may ignore the information about the value and the origin (vo).

    Definition Classes
    DefaultLongValues → LongValuesFactory
  43. def LongValue(origin: ValueOrigin): ALongValue.type

    Factory method to create a DomainValue that was created (explicitly or implicitly) by the instruction with the specified program counter.

    Factory method to create a DomainValue that was created (explicitly or implicitly) by the instruction with the specified program counter.

    The domain may ignore the information about the origin (vo).

    Definition Classes
    DefaultLongValues → LongValuesFactory
  44. final val MetaInformationUpdateIllegalValue: MetaInformationUpdate[DomainIllegalValue]

    The result of the merge of two incompatible values has to be reported as a MetaInformationUpdate[DomainIllegalValue].

    The result of the merge of two incompatible values has to be reported as a MetaInformationUpdate[DomainIllegalValue].

    Definition Classes
    DefaultSpecialDomainValuesBinding → ValuesDomain
  45. final def MethodExternalNullPointerException(pc: Int): ExceptionValue
    Definition Classes
    ExceptionsFactory
  46. def MethodHandle(origin: ValueOrigin, handle: MethodHandle): DomainReferenceValue

    Called by the AI framework for each load constant method handle (org.opalj.br.instructions.LoadMethodHandle) instruction to get a representation of/a DomainValue that represents the handle.

    Called by the AI framework for each load constant method handle (org.opalj.br.instructions.LoadMethodHandle) instruction to get a representation of/a DomainValue that represents the handle.

    handle

    A valid method handle.

    returns

    An InitializedObjectValue(ObjectType.MethodHandle). Hence, this method needs to be overridden if resolution of MethodHandle based method calls should be performed.

    Definition Classes
    ReferenceValuesFactory
  47. def MethodType(origin: ValueOrigin, descriptor: MethodDescriptor): DomainReferenceValue

    Called by the framework for each load constant method type (org.opalj.br.instructions.LoadMethodType) instruction to get a domain-specific representation of the method descriptor as a MethodType.

    Called by the framework for each load constant method type (org.opalj.br.instructions.LoadMethodType) instruction to get a domain-specific representation of the method descriptor as a MethodType.

    descriptor

    A valid method descriptor.

    returns

    An InitializedObjectValue(ObjectType.MethodType). Hence, this method needs to be overridden if resolution of MethodType based method calls should be performed.

    Definition Classes
    ReferenceValuesFactory
  48. final def NegativeArraySizeException(origin: ValueOrigin): ExceptionValue

    Creates a non-null object that represent a NegativeArraySizeException and that has the given origin.

    Creates a non-null object that represent a NegativeArraySizeException and that has the given origin. If the NegativeArraySizeException was created by the VM while evaluating an instruction with the program counter pc you use the method ValueOriginForImmediateVMException to translate that pc to the appropriate ValueOrigin.

    Definition Classes
    DefaultExceptionsFactory → ExceptionsFactory
  49. def NewArray(pc: Int, counts: Operands, arrayType: ArrayType): DomainArrayValue

    Factory method to create a new domain value that represents a newly created array (non-null) with the size determined by count that is empty.

    Factory method to create a new domain value that represents a newly created array (non-null) with the size determined by count that is empty.

    Typical Usage

    This factory method is (implicitly) used, e.g., by OPAL when a multianewarray instruction is found.

    Summary

    The properties of the value are:

    • Type: Precise
    • Null: No
    • Size: Depending on the values in counts
    • Content: Symbol("Empty")' (i.e., default values w.r.t. to the array's component type)
    Definition Classes
    TypeLevelReferenceValues
  50. def NewArray(pc: Int, count: DomainValue, arrayType: ArrayType): DomainArrayValue

    Factory method to create a new domain value that represents a newly created array (non-null) with the size determined by count that is empty.

    Factory method to create a new domain value that represents a newly created array (non-null) with the size determined by count that is empty.

    Typical Usage

    This factory method is (implicitly) used, e.g., by OPAL when a newarray instruction is found.

    Summary

    The properties of the value are:

    • Type: Precise
    • Null: No
    • Size: Count
    • Content: Symbol("Empty")' (i.e., default values w.r.t. to the array's component type)
    Definition Classes
    TypeLevelReferenceValues
  51. def NewObject(pc: Int, objectType: ObjectType): DomainObjectValue

    Creates a new DomainValue that represents a new, uninitialized instance of an object of the given type.

    Creates a new DomainValue that represents a new, uninitialized instance of an object of the given type. The object was created by the (NEW) instruction with the specified program counter.

    OPAL calls this method when it evaluates newobject instructions. If the bytecode is valid a call of one of the (super) object's constructors will subsequently initialize the object.

    Summary

    The properties of the domain value are:

    • Initialized: no (only the memory is allocated for the object)
    • Type: precise (i.e., this type is not an upper bound, the type correctly models the runtime type.)
    • Null: no (This value is not null.)
    Definition Classes
    TypeLevelReferenceValues → ReferenceValuesFactory
    Note

    Instances of arrays are created by the newarray and multianewarray instructions and in both cases an exception may be thrown (e.g., NegativeArraySizeException).

  52. def NonNullObjectValue(pc: Int, objectType: ObjectType): DomainObjectValue

    Represents a non-null reference value with the given type as an upper type bound.

    Represents a non-null reference value with the given type as an upper type bound.

    The domain may ignore the information about the value and the origin (vo).

    Summary

    The properties of the domain value are:

    • Initialized: Yes (the constructor was called)
    • Type: Upper Bound
    • Null: No (This value is not null.)
    Definition Classes
    TypeLevelReferenceValues → ReferenceValuesFactory
  53. final def NullPointerException(origin: ValueOrigin): ExceptionValue

    Creates a non-null object that represent a NullPointerException and that has the given origin.

    Creates a non-null object that represent a NullPointerException and that has the given origin. If the NullPointerException was created by the VM while evaluating an instruction with the program counter pc you should use the method ValueOriginForImmediateVMException to translate that pc to the appropriate ValueOrigin.

    Definition Classes
    DefaultExceptionsFactory → ExceptionsFactory
  54. def NullValue(origin: ValueOrigin): DomainNullValue

    Factory method to create a DomainValue that represents value null and and that was created (explicitly or implicitly) by the instruction with the specified program counter.

    Factory method to create a DomainValue that represents value null and and that was created (explicitly or implicitly) by the instruction with the specified program counter.

    The domain may ignore the information about the value and the origin (pc).

    Summary

    The properties of the domain value are:

    • Initialized: N/A
    • Type: Null
    • Null: Yes

    This implementation always returns the singleton instance TheNullValue.

    Definition Classes
    DefaultReferenceValuesBinding → TypeLevelReferenceValues → ReferenceValuesFactory
  55. def ObjectValue(origin: ValueOrigin, upperTypeBound: UIDSet[ObjectType]): DomainObjectValue

    Factory method to create a DomainValue that represents either an class-/interface value that has the given types as an upper bound or the value null.

    Factory method to create a DomainValue that represents either an class-/interface value that has the given types as an upper bound or the value null. However, the information whether the value is null or not is not available. Furthermore, the type may also just be an upper bound and it is not known if the value is properly initialized.

    Summary

    The properties of the domain value are:

    • Initialized: Yes (An Object with multiple bounds can only exist due to a merge, in this case, the objects must have been initialized beforehand or the value is not used at all and actually represents a dead variable.)
    • Type: Upper Bound
    • Null: Unknown
    • Content: Unknown
    Definition Classes
    DefaultReferenceValuesBinding → TypeLevelReferenceValues
  56. def ObjectValue(origin: ValueOrigin, objectType: ObjectType): DomainObjectValue

    Factory method to create a DomainValue that represents either an class-/interface value that has the given type or the value null.

    Factory method to create a DomainValue that represents either an class-/interface value that has the given type or the value null. However, the information whether the value is null or not is not available. Furthermore, the type may also just be an upper bound and it is not known if the value is properly initialized.

    Summary

    The properties of the domain value are:

    • Initialized: Unknown (I.e., it is not guaranteed that the constructor was called; unless NewObject was overridden and returns DomainValues that are distinguishable!)
    • Type: Upper Bound
    • Null: Unknown
    • Content: Unknown
    Definition Classes
    DefaultReferenceValuesBinding → TypeLevelReferenceValues
  57. final def ReferenceValue(pc: Int, upperTypeBound: ReferenceType): AReferenceValue

    Factory method to create a DomainValue that represents either a reference value that has the given type and is initialized or the value null.

    Factory method to create a DomainValue that represents either a reference value that has the given type and is initialized or the value null. However, the information whether the value is null or not is not available. Furthermore, the type may also just be an upper bound.

    The domain may ignore the information about the value and the origin, but it has to remain possible for the domain to identify the component type of an array.

    Summary

    The properties of the domain value are:

    • Initialized: Yes (if non-null the constructor was called/the array was initialized)
    • Type: Upper Bound
    • Null: Unknown
    • Content: Unknown
    Definition Classes
    TypeLevelReferenceValues → ReferenceValuesFactory
  58. final def ReturnAddressValue(address: Int): ReturnAddressValue

    Factory method to create an instance of a ReturnAddressValue.

    Factory method to create an instance of a ReturnAddressValue.

    Definition Classes
    DefaultSpecialDomainValuesBinding → ValuesDomain
  59. def ShortValue(origin: ValueOrigin, value: Short): DomainTypedValue[CTIntType]

    Factory method to create a DomainValue that represents the given short value and that was created (explicitly or implicitly) by the instruction with the specified program counter.

    Factory method to create a DomainValue that represents the given short value and that was created (explicitly or implicitly) by the instruction with the specified program counter.

    Definition Classes
    DefaultIntegerRangeValues → IntegerValuesFactory
  60. def ShortValue(origin: ValueOrigin): DomainTypedValue[CTIntType]

    Factory method to create a DomainValue that was created (explicitly or implicitly) by the instruction with the specified program counter.

    Factory method to create a DomainValue that was created (explicitly or implicitly) by the instruction with the specified program counter.

    The domain may ignore the information about the origin (origin).

    Definition Classes
    DefaultIntegerRangeValues → IntegerValuesFactory
  61. def StringValue(pc: Int, value: String): DomainObjectValue

    Factory method to create a DomainValue that represents the given string value and that was created by the instruction with the specified program counter.

    Factory method to create a DomainValue that represents the given string value and that was created by the instruction with the specified program counter.

    This function is called by OPAL-AI when a string constant (LDC(_W) instruction) is put on the stack.

    The domain may ignore the information about the value and the origin (vo).

    Summary

    The properties of the domain value are:

    • Initialized: Yes and the String's value is the given value. The string may be empty (""), but it is never null.
    • Type: java.lang.String
    • Null: No
    value

    A non-null string. (The string may be empty, though.)

    Definition Classes
    TypeLevelReferenceValues → ReferenceValuesFactory
  62. final def StructuralUpdateIllegalValue: StructuralUpdate[Nothing]

    The result of merging two values should never be reported as a StructuralUpdate if the computed value is an IllegalValue.

    The result of merging two values should never be reported as a StructuralUpdate if the computed value is an IllegalValue. The JVM semantics guarantee that the value will not be used and, hence, continuing the interpretation is meaningless.

    Definition Classes
    ValuesDomain
    Note

    This method is solely defined for documentation purposes and to catch implementation errors early on.

  63. final val TheIllegalValue: DomainIllegalValue

    The singleton instance of the IllegalValue.

    The singleton instance of the IllegalValue.

    Definition Classes
    DefaultSpecialDomainValuesBinding → ValuesDomain
  64. val TheNullValue: DomainNullValue
    Definition Classes
    DefaultReferenceValuesBinding
  65. final val TheReturnAddressValues: ReturnAddressValues

    The singleton instance of ReturnAddressValues

    The singleton instance of ReturnAddressValues

    Definition Classes
    DefaultSpecialDomainValuesBinding → ValuesDomain
  66. final def Throwable(origin: ValueOrigin): ExceptionValue

    Creates a non-null object that represent a Throwable object and that has the given origin.

    Creates a non-null object that represent a Throwable object and that has the given origin. If the Throwable was created by the VM while evaluating an instruction with the program counter pc you should use the method ValueOriginForImmediateVMException to translate that pc to the appropriate ValueOrigin.

    Definition Classes
    DefaultExceptionsFactory → ExceptionsFactory
  67. def TypedValue(origin: ValueOrigin, valueType: Type): DomainValue

    Factory method to create domain values with a specific type.

    Factory method to create domain values with a specific type. I.e., values for which we have some type information but no precise value or source information. However, the value is guaranteed to be null or properly initialized.

    For example, if valueType is a reference type it may be possible that the actual value is null, but such knowledge is not available.

    The framework uses this method when a method is to be analyzed, but no parameter values are given and initial values need to be generated. This method is not used elsewhere by the framework.

    Definition Classes
    TypedValuesFactory
  68. def UninitializedThis(objectType: ObjectType): DomainObjectValue

    Creates a new DomainValue that represents the this value of a constructor before the super constructor is called.

    Creates a new DomainValue that represents the this value of a constructor before the super constructor is called. Hence, the value origin is necessarily always -1.

    OPAL calls this method when it creates the initial locals for constructors.

    Summary

    The properties of the domain value are:

    • Initialized: no (only the memory is allocated for the object)
    • Type: upper bound
    • Null: no (This value is not null.)
    Definition Classes
    TypeLevelReferenceValues → ReferenceValuesFactory
    Note

    Instances of arrays are never uninitialized.

  69. final def VMArithmeticException(pc: Int): ExceptionValue
    Definition Classes
    ExceptionsFactory
  70. final def VMArrayIndexOutOfBoundsException(pc: Int): ExceptionValue
    Definition Classes
    ExceptionsFactory
  71. final def VMArrayStoreException(pc: Int): ExceptionValue
    Definition Classes
    ExceptionsFactory
  72. final def VMClassCastException(pc: Int): ExceptionValue
    Definition Classes
    ExceptionsFactory
  73. final def VMClassNotFoundException(pc: Int): ExceptionValue
    Definition Classes
    ExceptionsFactory
  74. final def VMIllegalMonitorStateException(pc: Int): ExceptionValue
    Definition Classes
    ExceptionsFactory
  75. final def VMNegativeArraySizeException(pc: Int): ExceptionValue
    Definition Classes
    ExceptionsFactory
  76. final def VMNullPointerException(pc: Int): ExceptionValue
    Definition Classes
    ExceptionsFactory
  77. final def VMThrowable(pc: Int): ExceptionValue
    Definition Classes
    ExceptionsFactory
  78. def aaload(pc: Int, index: DomainValue, arrayref: DomainValue): ArrayLoadResult
    Definition Classes
    GeneralizedArrayHandling → ReferenceValuesDomain
  79. def aastore(pc: Int, value: DomainValue, index: DomainValue, arrayref: DomainValue): ArrayStoreResult
    Definition Classes
    GeneralizedArrayHandling → ReferenceValuesDomain
  80. 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

    false

    Definition Classes
    ThrowAllPotentialExceptionsConfiguration → Configuration
  81. 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

    false

    Definition Classes
    ThrowAllPotentialExceptionsConfiguration → Configuration
  82. def abruptMethodExecution(pc: Int, exception: ExceptionValue): Unit

    Called by the abstract interpreter when an exception is thrown that is not (guaranteed to be) handled within the same method.

    Called by the abstract interpreter when an exception is thrown that is not (guaranteed to be) handled within the same method.

    Definition Classes
    DefaultHandlingForThrownExceptions → ReturnInstructionsDomain
    Note

    If the original exception value is null (/*E.g.*/throw null;), then the exception that is actually thrown is a new NullPointerException. This situation is, however, completely handled by OPAL and the exception value is hence never null.

  83. def abstractInterpretationEnded(aiResult: AIResult { val domain: DefaultIntervalValuesDomain.this.type }): Unit

    Called by the abstract interpreter when the abstract interpretation of a method has ended.

    Called by the abstract interpreter when the abstract interpretation of a method has ended. The abstract interpretation of a method ends if either the fixpoint is reached or the interpretation was aborted.

    By default this method does nothing.

    Domains that override this method are expected to also call super.abstractInterpretationEnded(aiResult).

    Definition Classes
    CoreDomainFunctionality
  84. def afterEvaluation(pc: Int, instruction: Instruction, oldOperands: Operands, oldLocals: Locals, targetPC: Int, isExceptionalControlFlow: Boolean, forceJoin: Boolean, newOperands: Operands, newLocals: Locals): (Operands, Locals)

    This methods is called after the evaluation of the instruction with the given pc with respect to targetPC, but before the values are propagated (joined) and before it is checked whether the interpretation needs to be continued.

    This methods is called after the evaluation of the instruction with the given pc with respect to targetPC, but before the values are propagated (joined) and before it is checked whether the interpretation needs to be continued. I.e., if the operands (newOperands) or locals (newLocals) are further refined then the refined operands and locals are joined (if necessary).

    Definition Classes
    CoreDomainFunctionality
    Note

    During the evaluation of the instruction it is possible that this method is called multiple times with different targetPCs. The latter is not only true for control flow instructions, but also for those instructions that may raise an exception. This method can and is intended to be overridden to further refine the operand stack/the locals. However, the overriding method should always forward the (possibly refined) operands and locals to the super method (stackable traits).

  85. def areturn(pc: Int, value: DomainValue): Computation[Nothing, ExceptionValue]

    The given value, which is a value with computational type reference, is returned by the return instruction with the given pc.

    The given value, which is a value with computational type reference, is returned by the return instruction with the given pc.

    Definition Classes
    DefaultHandlingForReturnInstructions → ReturnInstructionsDomain
  86. def arraylength(pc: Int, arrayref: DomainValue): Computation[DomainValue, ExceptionValue]

    Returns the array's length or throws a NullPointerException if the given reference is null.

    Returns the array's length or throws a NullPointerException if the given reference is null.

    Definition Classes
    TypeLevelReferenceValues → ReferenceValuesDomain
    Note

    It is in general not necessary to override this method. If you need some special handling refine the trait ArrayValue.

  87. def arrayload(pc: Int, index: DomainValue, arrayref: DomainValue): ArrayLoadResult

    Loads the value stored in the array at the given index or throws an exception (NullPointerException or IndexOutOfBoundsException).

    Loads the value stored in the array at the given index or throws an exception (NullPointerException or IndexOutOfBoundsException).

    Definition Classes
    TypeLevelReferenceValues → GeneralizedArrayHandling
    Note

    It is in general not necessary to override this method. If you need some special handling refine the load method defined by the trait ArrayValue.

  88. def arraystore(pc: Int, value: DomainValue, index: DomainValue, arrayref: DomainValue): ArrayStoreResult

    Stores the given value in the array at the given index or throws an exception (NullPointerException, ArrayStoreException or IndexOutOfBoundsException).

    Stores the given value in the array at the given index or throws an exception (NullPointerException, ArrayStoreException or IndexOutOfBoundsException).

    Definition Classes
    TypeLevelReferenceValues → GeneralizedArrayHandling
    Note

    It is in general not necessary to override this method. If you need some special handling refine the store method defined by the trait ArrayValue.

  89. def asArrayAbstraction(value: DomainValue): ArrayAbstraction
    Definition Classes
    TypeLevelReferenceValues
  90. def asObjectValue(value: DomainValue): DomainObjectValue
    Definition Classes
    TypeLevelReferenceValues
  91. def asReferenceValue(value: DomainValue): AReferenceValue

    Returns the given value as a DomainReferenceValue.

    Returns the given value as a DomainReferenceValue. Basically just performs a type cast and is intended to be used to communicate that the value has to be a reference value (if the underlying byte code is valid.)

    Definition Classes
    TypeLevelReferenceValues
  92. def baload(pc: Int, index: DomainValue, arrayref: DomainValue): ArrayLoadResult
    Definition Classes
    GeneralizedArrayHandling → ReferenceValuesDomain
  93. def bastore(pc: Int, value: DomainValue, index: DomainValue, arrayref: DomainValue): ArrayStoreResult
    Definition Classes
    GeneralizedArrayHandling → ReferenceValuesDomain
  94. def caload(pc: Int, index: DomainValue, arrayref: DomainValue): ArrayLoadResult
    Definition Classes
    GeneralizedArrayHandling → ReferenceValuesDomain
  95. def castore(pc: Int, value: DomainValue, index: DomainValue, arrayref: DomainValue): ArrayStoreResult
    Definition Classes
    GeneralizedArrayHandling → ReferenceValuesDomain
  96. def cfJoins: IntTrieSet

    Definition Classes
    TheCodeStructure
    See also

    org.opalj.br.Code.cfPCs, org.opalj.br.Code.cfJoins, org.opalj.br.Code.predecessorPCs

  97. final def classFile: ClassFile
    Definition Classes
    TheMethod
    Annotations
    @inline()
  98. implicit final def classHierarchy: ClassHierarchy

    Returns the project's class hierarchy.

    Returns the project's class hierarchy.

    Definition Classes
    TheProject
    Annotations
    @inline()
  99. def cloneConstraintsStore(store: ConstraintsStore): ConstraintsStore
    Definition Classes
    ConstraintsBetweenIntegerValues
  100. final val code: Code

    Returns the code block that is currently analyzed.

    Returns the code block that is currently analyzed.

    Definition Classes
    TheMethod → TheCode
  101. def d2f(pc: Int, value: DomainValue): DomainValue
    Definition Classes
    TypeLevelPrimitiveValuesConversions → PrimitiveValuesConversionsDomain
  102. def d2i(pc: Int, value: DomainValue): DomainValue
    Definition Classes
    TypeLevelPrimitiveValuesConversions → PrimitiveValuesConversionsDomain
  103. def d2l(pc: Int, value: DomainValue): DomainValue
    Definition Classes
    TypeLevelPrimitiveValuesConversions → PrimitiveValuesConversionsDomain
  104. def dadd(pc: Int, value1: DomainValue, value2: DomainValue): DomainValue
    Definition Classes
    TypeLevelDoubleValues → DoubleValuesDomain
  105. def daload(pc: Int, index: DomainValue, arrayref: DomainValue): ArrayLoadResult
    Definition Classes
    GeneralizedArrayHandling → ReferenceValuesDomain
  106. def dastore(pc: Int, value: DomainValue, index: DomainValue, arrayref: DomainValue): ArrayStoreResult
    Definition Classes
    GeneralizedArrayHandling → ReferenceValuesDomain
  107. def dcmpg(pc: Int, value1: DomainValue, value2: DomainValue): DomainValue
    Definition Classes
    TypeLevelDoubleValues → DoubleValuesDomain
  108. def dcmpl(pc: Int, value1: DomainValue, value2: DomainValue): DomainValue
    Definition Classes
    TypeLevelDoubleValues → DoubleValuesDomain
  109. def ddiv(pc: Int, value1: DomainValue, value2: DomainValue): DomainValue
    Definition Classes
    TypeLevelDoubleValues → DoubleValuesDomain
  110. def dmul(pc: Int, value1: DomainValue, value2: DomainValue): DomainValue
    Definition Classes
    TypeLevelDoubleValues → DoubleValuesDomain
  111. def dneg(pc: Int, value: DomainValue): DomainValue
    Definition Classes
    TypeLevelDoubleValues → DoubleValuesDomain
  112. def doGetfield(pc: Int, objectref: DomainValue, fieldValue: DomainValue): Computation[DomainValue, ExceptionValue]
    Definition Classes
    TypeLevelFieldAccessInstructions
  113. def doGetstatic(pc: Int, fieldValue: DomainValue): Computation[DomainValue, Nothing]
    Definition Classes
    TypeLevelFieldAccessInstructions
  114. def doLoadDynamic(pc: Int, constantValue: DomainValue): Computation[DomainValue, Nothing]
    Definition Classes
    TypeLevelDynamicLoads
  115. def drem(pc: Int, value1: DomainValue, value2: DomainValue): DomainValue
    Definition Classes
    TypeLevelDoubleValues → DoubleValuesDomain
  116. def dreturn(pc: Int, value: DomainValue): Computation[Nothing, ExceptionValue]

    The given value, which is a value with computational type double, is returned by the return instruction with the given pc.

    The given value, which is a value with computational type double, is returned by the return instruction with the given pc.

    Definition Classes
    DefaultHandlingForReturnInstructions → ReturnInstructionsDomain
  117. def dsub(pc: Int, value1: DomainValue, value2: DomainValue): DomainValue
    Definition Classes
    TypeLevelDoubleValues → DoubleValuesDomain
  118. def establishConstraint(pc: Int, v1: IntegerLikeValue, v2: IntegerLikeValue, c: Constraint): ConstraintsStore
    Definition Classes
    ConstraintsBetweenIntegerValues
  119. def evaluationCompleted(pc: Int, worklist: List[Int], evaluatedPCs: IntArrayStack, operandsArray: OperandsArray, localsArray: LocalsArray, tracer: Option[AITracer]): Unit

    Called by the framework after evaluating the instruction with the given pc.

    Called by the framework after evaluating the instruction with the given pc. I.e., the state of all potential successor instructions was updated and the flow method was called – potentially multiple times – accordingly.

    By default this method does nothing.

    Definition Classes
    CoreDomainFunctionality
  120. def f2d(pc: Int, value: DomainValue): DomainValue
    Definition Classes
    TypeLevelPrimitiveValuesConversions → PrimitiveValuesConversionsDomain
  121. def f2i(pc: Int, value: DomainValue): DomainValue
    Definition Classes
    TypeLevelPrimitiveValuesConversions → PrimitiveValuesConversionsDomain
  122. def f2l(pc: Int, value: DomainValue): DomainValue
    Definition Classes
    TypeLevelPrimitiveValuesConversions → PrimitiveValuesConversionsDomain
  123. def fadd(pc: Int, value1: DomainValue, value2: DomainValue): DomainValue
    Definition Classes
    TypeLevelFloatValues → FloatValuesDomain
  124. def faload(pc: Int, index: DomainValue, arrayref: DomainValue): ArrayLoadResult
    Definition Classes
    GeneralizedArrayHandling → ReferenceValuesDomain
  125. def fastore(pc: Int, value: DomainValue, index: DomainValue, arrayref: DomainValue): ArrayStoreResult
    Definition Classes
    GeneralizedArrayHandling → ReferenceValuesDomain
  126. def fcmpg(pc: Int, value1: DomainValue, value2: DomainValue): DomainValue
    Definition Classes
    TypeLevelFloatValues → FloatValuesDomain
  127. def fcmpl(pc: Int, value1: DomainValue, value2: DomainValue): DomainValue
    Definition Classes
    TypeLevelFloatValues → FloatValuesDomain
  128. def fdiv(pc: Int, value1: DomainValue, value2: DomainValue): DomainValue
    Definition Classes
    TypeLevelFloatValues → FloatValuesDomain
  129. def flow(currentPC: Int, currentOperands: Operands, currentLocals: Locals, successorPC: Int, isSuccessorScheduled: Answer, isExceptionalControlFlow: Boolean, abruptSubroutineTerminationCount: Int, wasJoinPerformed: Boolean, worklist: List[Int], operandsArray: OperandsArray, localsArray: LocalsArray, tracer: Option[AITracer]): List[Int]

    Called by the framework after performing a computation to inform the domain about the result.

    Called by the framework after performing a computation to inform the domain about the result. That is, after evaluating the effect of the instruction with currentPC on the current stack and register and (if necessary) joining the updated stack and registers with the stack and registers associated with the instruction successorPC. (Hence, this method is ONLY called for return instructions if the return instruction throws an IllegalMonitorStateException.) This function basically informs the domain about the instruction that may be evaluated next. The flow function is called for every possible successor of the instruction with currentPC. This includes all branch targets as well as those instructions that handle exceptions.

    In some cases it will even be the case that flow is called multiple times with the same pair of program counters: (currentPC, successorPC). This may happen, e.g., in case of a switch instruction where multiple values have the same body/target instruction and we do not have precise information about the switch value. E.g., as in the following snippet:

    switch (i) {  // pc: X => Y (for "1"), Y (for "2"), Y (for "3")
case 1:
case 2:
case 3: System.out.println("Great.");            // pc: Y
default: System.out.println("Not So Great.");    // pc: Z
}

    The flow function is also called after instructions that are domain independent such as dup and load instructions which just manipulate the registers and stack in a generic way. This enables the domain to precisely follow the evaluation progress and in particular to perform control-flow dependent analyses.

    currentPC

    The program counter of the instruction that is currently evaluated by the abstract interpreter.

    currentOperands

    The current operands. I.e., the operand stack before the instruction is evaluated.

    currentLocals

    The current locals. I.e., the locals before the instruction is evaluated.

    successorPC

    The program counter of an instruction that is a potential successor of the instruction with currentPC. In general the AI framework adds the pc of the successor instruction to the beginning of the worklist unless it is a join instruction. In this case the pc is added to the end – in the context of the current (sub)routine. Hence, the AI framework first evaluates all paths leading to a join instruction before the join instruction will be evaluated.

    isSuccessorScheduled

    Yes if the successor instruction is or was scheduled. I.e., Yes is returned if the worklist contains successorPC, No if the worklist does not contain successorPC. Unknown is returned if the AI framework did not process the worklist and doesn't know anything about the scheduled successors. Note that this value is independent of the subroutine in which the value may be scheduled. If an implementation schedules successorPC the the super call has to set isSuccessorScheduled to Yes.

    isExceptionalControlFlow

    true if and only if the evaluation of the instruction with the program counter currentPC threw an exception; false otherwise. Hence, if this parameter is true the instruction with successorPC is the first instruction of the handler.

    abruptSubroutineTerminationCount

    > 0 if and only if we have an exceptional control flow that terminates one or more subroutines. In this case the successor instruction is scheduled (if at all) after all subroutines that will be terminated by the exception.

    wasJoinPerformed

    true if a join was performed. I.e., the successor instruction is an instruction (Code.cfJoins) that was already previously evaluated and where multiple paths potentially join.

    worklist

    The current list of instructions that will be evaluated next.

    If subroutines are not used (i.e., Java >= 5)

    If you want to force the evaluation of the instruction with the program counter successorPC it is sufficient to test whether the list already contains successorPC and – if not – to prepend it. If the worklist already contains successorPC then the domain is allowed to move the PC to the beginning of the worklist.

    If the code contains subroutines (JSR/RET)

    If the PC does not belong to the same (current) (sub)routine, it is not allowed to be moved to the beginning of the worklist. (Subroutines can only be found in code generated by old Java compilers; before Java 6. Subroutines are identified by jsr/ret instructions. A subroutine can be identified by going back in the worklist and by looking for specific "program counters" (e.g., SUBROUTINE_START, SUBROUTINE_END). These program counters mark the beginning of a subroutine. In other words, an instruction can be freely moved around unless a special program counter value is found. All special program counters use negative values. Additionally, neither the negative values nor the positive values between two negative values should be changed. Furthermore, no value (PC) should be put between negative values that capture subroutine information. If the domain updates the worklist, it is the responsibility of the domain to call the tracer and to inform it about the changes. Note that the worklist is not allowed to contain duplicates related to the evaluation of the current (sub-)routine.

    operandsArray

    The array that associates every instruction with its operand stack that is in effect. Note, that only those elements of the array contain values that are related to instructions that were evaluated in the past; the other elements are null. Furthermore, it identifies the operandsArray of the subroutine that will execute the instruction with successorPC. The operandsArray may be null for the current instruction (not the successor instruction) if the execution of the current instruction leads to the termination of the current subroutine. In this case the information about the operands and locals associated with all instructions belonging to the subroutine is reset.

    localsArray

    The array that associates every instruction with its current register values. Note, that only those elements of the array contain values that are related to instructions that were evaluated in the past. The other elements are null. Furthermore, it identifies the localsArray of the subroutine that will execute the instruction with successorPC. The localsArray may be null for the current instruction (not the successor instruction) if the execution of the current instruction leads to the termination of the current subroutine. In this case the information about the operands and locals associated with all instructions belonging to the subroutine is reset.

    returns

    The updated worklist. In most cases this is simply the given worklist. The default case is also to return the given worklist.

    Definition Classes
    ConstraintsBetweenIntegerValues → CoreDomainFunctionality
    Note

    The domain is allowed to modify the worklist, operandsArray and localsArray. However, the AI will not perform any checks. In case of updates of the operandsArray or localsArray it is necessary to first create a shallow copy before updating it. If this is not done, it may happen that the locals associated with other instructions are also updated.

    ,

    A method that overrides this method must always call the super method to ensure that every domain that uses this hook gets informed about a flow.

  130. def fmul(pc: Int, value1: DomainValue, value2: DomainValue): DomainValue
    Definition Classes
    TypeLevelFloatValues → FloatValuesDomain
  131. def fneg(pc: Int, value: DomainValue): DomainValue
    Definition Classes
    TypeLevelFloatValues → FloatValuesDomain
  132. def frem(pc: Int, value1: DomainValue, value2: DomainValue): DomainValue
    Definition Classes
    TypeLevelFloatValues → FloatValuesDomain
  133. def freturn(pc: Int, value: DomainValue): Computation[Nothing, ExceptionValue]

    The given value, which is a value with computational type float, is returned by the return instruction with the given pc.

    The given value, which is a value with computational type float, is returned by the return instruction with the given pc.

    Definition Classes
    DefaultHandlingForReturnInstructions → ReturnInstructionsDomain
  134. def fsub(pc: Int, value1: DomainValue, value2: DomainValue): DomainValue
    Definition Classes
    TypeLevelFloatValues → FloatValuesDomain
  135. def getfield(pc: Int, objectref: DomainValue, declaringClass: ObjectType, fieldName: String, fieldType: FieldType): Computation[DomainValue, ExceptionValue]

    Returns the field's value and/or a new NullPointerException if the given objectref represents the value null.

    Returns the field's value and/or a new NullPointerException if the given objectref represents the value null.

    returns

    The field's value or a new NullPointerException.

    Definition Classes
    TypeLevelFieldAccessInstructions → FieldAccessesDomain
  136. def getstatic(pc: Int, declaringClass: ObjectType, fieldName: String, fieldType: FieldType): Computation[DomainValue, Nothing]

    Returns the field's value.

    Returns the field's value.

    Definition Classes
    TypeLevelFieldAccessInstructions → FieldAccessesDomain
  137. def i2b(pc: Int, value: DomainValue): DomainValue
    Definition Classes
    IntegerRangeValues → IntegerValuesDomain
  138. def i2c(pc: Int, value: DomainValue): DomainValue
    Definition Classes
    IntegerRangeValues → IntegerValuesDomain
  139. def i2d(pc: Int, value: DomainValue): DomainValue
    Definition Classes
    ConcretePrimitiveValuesConversions → TypeLevelPrimitiveValuesConversions → PrimitiveValuesConversionsDomain
  140. def i2f(pc: Int, value: DomainValue): DomainValue
    Definition Classes
    ConcretePrimitiveValuesConversions → TypeLevelPrimitiveValuesConversions → PrimitiveValuesConversionsDomain
  141. def i2l(pc: Int, value: DomainValue): DomainValue
    Definition Classes
    ConcretePrimitiveValuesConversions → TypeLevelPrimitiveValuesConversions → PrimitiveValuesConversionsDomain
  142. def i2s(pc: Int, value: DomainValue): DomainValue
    Definition Classes
    IntegerRangeValues → IntegerValuesDomain
  143. def iadd(pc: Int, value1: DomainValue, value2: DomainValue): DomainValue
    Definition Classes
    IntegerRangeValues → IntegerValuesDomain
  144. def iaload(pc: Int, index: DomainValue, arrayref: DomainValue): ArrayLoadResult
    Definition Classes
    GeneralizedArrayHandling → ReferenceValuesDomain
  145. def iand(pc: Int, value1: DomainValue, value2: DomainValue): DomainValue
    Definition Classes
    IntegerRangeValues → IntegerValuesDomain
  146. def iastore(pc: Int, value: DomainValue, index: DomainValue, arrayref: DomainValue): ArrayStoreResult
    Definition Classes
    GeneralizedArrayHandling → ReferenceValuesDomain
  147. def idiv(pc: Int, numerator: DomainValue, denominator: DomainValue): IntegerValueOrArithmeticException
    Definition Classes
    IntegerRangeValues → IntegerValuesDomain
  148. def iinc(pc: Int, value: DomainValue, increment: Int): DomainValue
    Definition Classes
    IntegerRangeValues → IntegerValuesDomain
  149. def imul(pc: Int, value1: DomainValue, value2: DomainValue): DomainValue
    Definition Classes
    IntegerRangeValues → IntegerValuesDomain
  150. def ineg(pc: Int, value: DomainValue): DomainValue
    Definition Classes
    IntegerRangeValues → IntegerValuesDomain
  151. def instructions: Array[Instruction]
    Definition Classes
    TheCodeStructure
  152. def intAreEqual(pc: Int, value1: DomainValue, value2: DomainValue): Answer

    Tests if the two given integer values are equal.

    Tests if the two given integer values are equal.

    value1

    A value with computational type integer.

    value2

    A value with computational type integer.

    Definition Classes
    ConstraintsBetweenIntegerValues → IntegerRangeValues → IntegerValuesDomain
  153. def intAreNotEqual(pc: Int, value1: DomainValue, value2: DomainValue): Answer

    Tests if the two given integer values are not equal.

    Tests if the two given integer values are not equal.

    value1

    A value with computational type integer.

    value2

    A value with computational type integer.

    Definition Classes
    IntegerValuesDomain
  154. def intEstablishAreEqual(pc: Int, value1: DomainValue, value2: DomainValue, operands: Operands, locals: Locals): (Operands, Locals)

    Definition Classes
    ConstraintsBetweenIntegerValues → IntegerRangeValues → IntegerValuesDomain
    Note

    This function is ONLY defined if a corresponding test (value1 == value2) returned org.opalj.Unknown. I.e., this method is only allowed to be called if there is something to establish! I.e., the domain values are real ranges (not single values, e.g., [1,1]) that overlap.

  155. def intEstablishAreNotEqual(pc: Int, value1: DomainValue, value2: DomainValue, operands: Operands, locals: Locals): (Operands, Locals)

    Definition Classes
    ConstraintsBetweenIntegerValues → IntegerRangeValues → IntegerValuesDomain
    Note

    This function is ONLY defined if a corresponding test (value1 != value2) returned org.opalj.Unknown. I.e., this method is only allowed to be called if there is something to establish! I.e., the domain values are real ranges (not single values, e.g., [1,1]) that overlap.

  156. def intEstablishIsLessThan(pc: Int, left: DomainValue, right: DomainValue, operands: Operands, locals: Locals): (Operands, Locals)

    Definition Classes
    ConstraintsBetweenIntegerValues → IntegerRangeValues → IntegerValuesDomain
    Note

    This function is ONLY defined if a corresponding test (value1 < value2) returned org.opalj.Unknown. I.e., this method is only allowed to be called if there is something to establish! I.e., the domain values are real ranges (not single values, e.g., [1,1]) that overlap.

  157. def intEstablishIsLessThanOrEqualTo(pc: Int, left: DomainValue, right: DomainValue, operands: Operands, locals: Locals): (Operands, Locals)

    Definition Classes
    ConstraintsBetweenIntegerValues → IntegerRangeValues → IntegerValuesDomain
    Note

    This function is ONLY defined if a corresponding test (value1 <= value2) returned org.opalj.Unknown. I.e., this method is only allowed to be called if there is something to establish! I.e., the domain values are real ranges (not single values, e.g., [1,1]) that overlap.

  158. def intEstablishValue(pc: Int, theValue: Int, value: DomainValue, operands: Operands, locals: Locals): (Operands, Locals)

    Sets the given domain value to theValue.

    Sets the given domain value to theValue.

    This function is called by OPAL before it starts to explore the branch where this condition has to hold. (This function is, e.g., called whenever we explore the branches of a switch-case statement.) I.e., the constraint is established before a potential join operation.

    value

    An integer domain value that does also, but not exclusively represents theValue.

    Definition Classes
    ConstraintsBetweenIntegerValues → IntegerRangeValues → IntegerValuesDomain
  159. def intIs0(pc: Int, value: DomainValue): Answer

    Tests if the given integer value is 0 or maybe 0.

    Tests if the given integer value is 0 or maybe 0.

    value

    A value with computational type integer.

    Definition Classes
    IntegerValuesDomain
  160. def intIsGreaterThan(pc: Int, largerValue: DomainValue, smallerValue: DomainValue): Answer

    Tests if the first integer value is larger than the second value.

    Tests if the first integer value is larger than the second value.

    largerValue

    A value with computational type integer.

    smallerValue

    A value with computational type integer.

    Definition Classes
    IntegerValuesDomain
  161. def intIsGreaterThan0(pc: Int, value: DomainValue): Answer

    Tests if the given integer value is > 0 or maybe > 0.

    Tests if the given integer value is > 0 or maybe > 0.

    value

    A value with computational type integer.

    Definition Classes
    IntegerValuesDomain
  162. def intIsGreaterThanOrEqualTo(pc: Int, largerOrEqualValue: DomainValue, smallerOrEqualValue: DomainValue): Answer

    Tests if the first integer value is larger than or equal to the second value.

    Tests if the first integer value is larger than or equal to the second value.

    largerOrEqualValue

    A value with computational type integer.

    smallerOrEqualValue

    A value with computational type integer.

    Definition Classes
    IntegerValuesDomain
  163. def intIsGreaterThanOrEqualTo0(pc: Int, value: DomainValue): Answer

    Tests if the given value is greater than or equal to 0 or maybe greater than or equal to 0.

    Tests if the given value is greater than or equal to 0 or maybe greater than or equal to 0.

    value

    A value with computational type integer.

    Definition Classes
    IntegerValuesDomain
  164. def intIsLessThan(pc: Int, left: DomainValue, right: DomainValue): Answer

    Tests if the first integer value is smaller than the second value.

    Tests if the first integer value is smaller than the second value.

    Definition Classes
    ConstraintsBetweenIntegerValues → IntegerRangeValues → IntegerValuesDomain
  165. def intIsLessThan0(pc: Int, value: DomainValue): Answer

    Tests if the given integer value is < 0 or maybe < 0.

    Tests if the given integer value is < 0 or maybe < 0.

    value

    A value with computational type integer.

    Definition Classes
    IntegerValuesDomain
  166. def intIsLessThanOrEqualTo(pc: Int, left: DomainValue, right: DomainValue): Answer

    Tests if the first integer value is less than or equal to the second value.

    Tests if the first integer value is less than or equal to the second value.

    Definition Classes
    ConstraintsBetweenIntegerValues → IntegerRangeValues → IntegerValuesDomain
  167. def intIsLessThanOrEqualTo0(pc: Int, value: DomainValue): Answer

    Tests if the given integer value is less than or equal to 0 or maybe less than or equal to 0.

    Tests if the given integer value is less than or equal to 0 or maybe less than or equal to 0.

    value

    A value with computational type integer.

    Definition Classes
    IntegerValuesDomain
  168. def intIsNot0(pc: Int, value: DomainValue): Answer

    Tests if the given integer value is not 0 or maybe not 0.

    Tests if the given integer value is not 0 or maybe not 0.

    value

    A value with computational type integer.

    Definition Classes
    IntegerValuesDomain
  169. def intIsSomeValueInRange(pc: Int, value: DomainValue, lowerBound: Int, upperBound: Int): Answer

    Returns Yes iff at least one possible extension of the given value is in the specified range; that is, if the intersection of the range of values captured by the given value and the specified range is non-empty.

    Returns Yes iff at least one possible extension of the given value is in the specified range; that is, if the intersection of the range of values captured by the given value and the specified range is non-empty.

    For example, if the given value captures all positive integer values and the specified range is [-1,1] then the answer has to be Yes. If we know nothing about the potential extension of the given value the answer will be Unknown. The answer is No iff both ranges are non-overlapping.

    value

    A value that has to be of computational type integer.

    lowerBound

    The range's lower bound (inclusive).

    upperBound

    The range's upper bound (inclusive).

    Definition Classes
    IntegerRangeValues → IntegerValuesDomain
  170. def intIsSomeValueNotInRange(pc: Int, value: DomainValue, lowerBound: Int, upperBound: Int): Answer

    Returns Yes iff at least one (possible) extension of a given value is not in the specified range; that is, if the set difference of the range of values captured by the given value and the specified range is non-empty.

    Returns Yes iff at least one (possible) extension of a given value is not in the specified range; that is, if the set difference of the range of values captured by the given value and the specified range is non-empty. For example, if the given value has the integer value 10 and the specified range is [0,Integer.MAX_VALUE] then the answer has to be No. But, if the given value represents the range [-5,Integer.MAX_VALUE] and the specified range is again [0,Integer.MAX_VALUE] then the answer has to be Yes.

    The answer is Yes iff the analysis determined that at runtime value will have a value that is not in the specified range. If the analysis(domain) is not able to determine whether the value is or is not in the given range then the answer has to be Unknown.

    value

    A value that has to be of computational type integer.

    lowerBound

    The range's lower bound (inclusive).

    upperBound

    The range's upper bound (inclusive).

    Definition Classes
    IntegerRangeValues → IntegerValuesDomain
  171. final def intValue[T](value: DomainValue)(f: (Int) => T)(orElse: => T): T

    If the given value encapsulates a precise integer value then the function ifThen is called with the respective value otherwise orElse is called.

    If the given value encapsulates a precise integer value then the function ifThen is called with the respective value otherwise orElse is called.

    Definition Classes
    IntegerRangeValues → ConcreteIntegerValues
    Annotations
    @inline()
  172. final def intValueOption(value: DomainValue): Option[Int]

    Returns the current Int value represented by the domain value if it exists.

    Returns the current Int value represented by the domain value if it exists.

    Definition Classes
    IntegerRangeValues → ConcreteIntegerValues
    Annotations
    @inline()
    Note

    This method returns None if the DomainValue does not represent an Integer value or the precise value is not known. I.e., this method never fails.

  173. def invokedynamic(pc: Int, bootstrapMethod: BootstrapMethod, name: String, methodDescriptor: MethodDescriptor, operands: Operands): MethodCallResult
    Definition Classes
    TypeLevelInvokeInstructions → MethodCallsDomain
  174. def invokeinterface(pc: Int, declaringClass: ObjectType, name: String, methodDescriptor: MethodDescriptor, operands: Operands): MethodCallResult
    Definition Classes
    TypeLevelInvokeInstructions → MethodCallsDomain
  175. def invokespecial(pc: Int, declaringClass: ObjectType, isInterface: Boolean, name: String, methodDescriptor: MethodDescriptor, operands: Operands): MethodCallResult
    Definition Classes
    TypeLevelInvokeInstructions → MethodCallsDomain
  176. def invokestatic(pc: Int, declaringClass: ObjectType, isInterface: Boolean, name: String, methodDescriptor: MethodDescriptor, operands: Operands): MethodCallResult
    Definition Classes
    TypeLevelInvokeInstructions → MethodCallsDomain
  177. def invokevirtual(pc: Int, declaringClass: ReferenceType, name: String, methodDescriptor: MethodDescriptor, operands: Operands): MethodCallResult
    Definition Classes
    TypeLevelInvokeInstructions → MethodCallsDomain
  178. def ior(pc: Int, value1: DomainValue, value2: DomainValue): DomainValue
    Definition Classes
    IntegerRangeValues → IntegerValuesDomain
  179. def irem(pc: Int, left: DomainValue, right: DomainValue): IntegerValueOrArithmeticException
    Definition Classes
    IntegerRangeValues → IntegerValuesDomain
  180. def ireturn(pc: Int, value: DomainValue): Computation[Nothing, ExceptionValue]

    The given value, which is a value with computational type integer, is returned by the return instruction with the given pc.

    The given value, which is a value with computational type integer, is returned by the return instruction with the given pc.

    Definition Classes
    DefaultHandlingForReturnInstructions → ReturnInstructionsDomain
  181. final def isASubtypeOf(subtype: ReferenceType, supertype: ReferenceType): Answer

    Tests if subtype is known to be subtype of supertype.

    Tests if subtype is known to be subtype of supertype. See org.opalj.br.ClassHierarchy's isSubtypeOf method for details.

    Definition Classes
    ValuesDomain
  182. final def isSubtypeOf(subtype: ReferenceType, supertype: ReferenceType): Boolean

    Tests if subtype is known to be subtype of supertype.

    Tests if subtype is known to be subtype of supertype. See org.opalj.br.ClassHierarchy's isSubtypeOf method for details.

    Definition Classes
    ValuesDomain
  183. final def isValueASubtypeOf(value: DomainValue, supertype: ReferenceType): Answer

    Tries to determine – under the assumption that the given value is not null – if the runtime type of the given reference value could be a subtype of the specified reference type supertype.

    Tries to determine – under the assumption that the given value is not null – if the runtime type of the given reference value could be a subtype of the specified reference type supertype. I.e., if the type of the value is not precisely known, then all subtypes of the value's type are also taken into consideration when analyzing the subtype relation and only if we can guarantee that none is a subtype of the given supertype the answer will be No.

    Definition Classes
    TypeLevelReferenceValues → ReferenceValuesDomain
    Note

    The returned value is only meaningful if value does not represent the runtime value null.

  184. def ishl(pc: Int, value: DomainValue, shift: DomainValue): DomainValue
    Definition Classes
    IntegerRangeValues → IntegerValuesDomain
  185. def ishr(pc: Int, value: DomainValue, shift: DomainValue): DomainValue
    Definition Classes
    IntegerRangeValues → IntegerValuesDomain
  186. def isub(pc: Int, left: DomainValue, right: DomainValue): DomainValue
    Definition Classes
    IntegerRangeValues → IntegerValuesDomain
  187. def iushr(pc: Int, value: DomainValue, shift: DomainValue): DomainValue
    Definition Classes
    IntegerRangeValues → IntegerValuesDomain
  188. def ixor(pc: Int, value1: DomainValue, value2: DomainValue): DomainValue
    Definition Classes
    IntegerRangeValues → IntegerValuesDomain
  189. def join(pc: Int, thisOperands: Operands, thisLocals: Locals, otherOperands: Operands, otherLocals: Locals): Update[(Operands, Locals)]

    Joins the given operand stacks and local variables.

    Joins the given operand stacks and local variables.

    In general there should be no need to refine this method. Overriding this method should only be done for analysis purposes.

    Performance

    This method heavily relies on reference comparisons to speed up the overall process of performing an abstract interpretation of a method. Hence, a computation should – whenever possible – return (one of) the original object(s) if that value has the same abstract state as the result. Furthermore, if all original values capture the same abstract state as the result of the computation, the "left" value/the value that was already used in the past should be returned.

    returns

    The joined operand stack and registers. Returns NoUpdate if this memory layout already subsumes the other memory layout.

    Definition Classes
    CoreDomainFunctionality
    Note

    The size of the operands stacks that are to be joined and the number of registers/locals that are to be joined can be expected to be identical under the assumption that the bytecode is valid and the framework contains no bugs.

    ,

    The operand stacks are guaranteed to contain compatible values w.r.t. the computational type (unless the bytecode is not valid or OPAL contains an error). I.e., if the result of joining two operand stack values is an IllegalValue we assume that the domain implementation is incorrect. However, the joining of two register values can result in an illegal value - which identifies the value as being dead.

  190. def jumpToSubroutine(pc: Int, branchTarget: Int, returnTarget: Int): Unit

    pc

    The pc of the jsr(w) instruction.

    Definition Classes
    SubroutinesDomain
  191. final def justThrows(value: ExceptionValue): ThrowsException[ExceptionValues]
    Definition Classes
    ReferenceValuesFactory
  192. def l2d(pc: Int, value: DomainValue): DomainValue

    Conversion of the given long value to a double value.

    Conversion of the given long value to a double value.

    returns

    The result of calling DoubleValue(pc).

    Definition Classes
    ConcretePrimitiveValuesConversions → TypeLevelPrimitiveValuesConversions → PrimitiveValuesConversionsDomain
  193. def l2f(pc: Int, value: DomainValue): DomainValue

    Conversion of the given long value to a float value.

    Conversion of the given long value to a float value.

    returns

    The result of calling FloatValue(pc).

    Definition Classes
    ConcretePrimitiveValuesConversions → TypeLevelPrimitiveValuesConversions → PrimitiveValuesConversionsDomain
  194. def l2i(pc: Int, value: DomainValue): DomainValue

    Conversion of the given long value to an integer value.

    Conversion of the given long value to an integer value.

    returns

    The result of calling IntegerValue(pc).

    Definition Classes
    ConcretePrimitiveValuesConversions → TypeLevelPrimitiveValuesConversions → PrimitiveValuesConversionsDomain
  195. def ladd(pc: Int, value1: DomainValue, value2: DomainValue): DomainValue

    Add of two long values.

    Add of two long values.

    pc

    The pc of the add(+) instruction.

    value1

    A long value (guaranteed by the JVM's semantics).

    value2

    A long value (guaranteed by the JVM's semantics).

    Definition Classes
    LongValues → LongValuesDomain
  196. def laload(pc: Int, index: DomainValue, arrayref: DomainValue): ArrayLoadResult
    Definition Classes
    GeneralizedArrayHandling → ReferenceValuesDomain
  197. def land(pc: Int, value1: DomainValue, value2: DomainValue): DomainValue

    Boolean and of two long values.

    Boolean and of two long values.

    pc

    The pc of the "&" instruction.

    value1

    A long value (guaranteed by the JVM's semantics).

    value2

    A long value (guaranteed by the JVM's semantics).

    Definition Classes
    LongValues → LongValuesDomain
  198. def lastore(pc: Int, value: DomainValue, index: DomainValue, arrayref: DomainValue): ArrayStoreResult
    Definition Classes
    GeneralizedArrayHandling → ReferenceValuesDomain
  199. def lcmp(pc: Int, left: DomainValue, right: DomainValue): DomainValue

    Comparison (==) of two long values.

    Comparison (==) of two long values.

    pc

    The pc of the comparison instruction.

    returns

    A domain value that encapsulates an integer value with the value -1,0 or 1.

    Definition Classes
    LongValues → LongValuesDomain
  200. def ldiv(pc: Int, numerator: DomainValue, denominator: DomainValue): LongValueOrArithmeticException

    Division of two long values.

    Division of two long values.

    pc

    The pc of the div (/) instruction.

    returns

    The return value is the calculated value and/or (depending on the domain) an ArithmeticException if value2 is 0.

    Definition Classes
    LongValues → LongValuesDomain
  201. def lmul(pc: Int, value1: DomainValue, value2: DomainValue): DomainValue

    Multiplication of two long values.

    Multiplication of two long values.

    pc

    The pc of the mul (/) instruction.

    value1

    A long value (guaranteed by the JVM's semantics).

    value2

    A long value (guaranteed by the JVM's semantics).

    Definition Classes
    LongValues → LongValuesDomain
  202. def lneg(pc: Int, value: DomainValue): DomainValue

    Negation of a long value.

    Negation of a long value.

    pc

    The pc of the neg instruction.

    value

    A long value (guaranteed by the JVM's semantics).

    Definition Classes
    LongValues → LongValuesDomain
  203. def loadDynamic(pc: Int, bootstrapMethod: BootstrapMethod, fieldName: String, descriptor: FieldType): Computation[DomainValue, Nothing]

    Returns the dynamic constant's value.

    Returns the dynamic constant's value.

    Definition Classes
    TypeLevelDynamicLoads → DynamicLoadsDomain
  204. implicit final def logContext: LogContext
    Definition Classes
    TheProject → LogContextProvider
  205. final def longValue[T](value: DomainValue)(ifThen: (Long) => T)(orElse: => T): T

    If the given value represents one specific long value then the function ifThen is called with the respective value otherwise orElse is called.

    If the given value represents one specific long value then the function ifThen is called with the respective value otherwise orElse is called.

    Definition Classes
    LongValues → ConcreteLongValues
    Annotations
    @inline()
  206. final def longValueOption(value: DomainValue): Option[Long]

    Returns the current Long value represented by the domain value if it exists.

    Returns the current Long value represented by the domain value if it exists.

    Definition Classes
    LongValues → ConcreteLongValues
    Annotations
    @inline()
    Note

    This method returns None if the DomainValue does not represent a Long value or the precise value is not known. I.e., this method never fails.

  207. def lor(pc: Int, value1: DomainValue, value2: DomainValue): DomainValue

    Boolean or of two long values.

    Boolean or of two long values.

    pc

    The pc of the "boolean or" (|) instruction.

    value1

    A long value (guaranteed by the JVM's semantics).

    value2

    A long value (guaranteed by the JVM's semantics).

    Definition Classes
    LongValues → LongValuesDomain
  208. def lrem(pc: Int, left: DomainValue, right: DomainValue): LongValueOrArithmeticException

    Remainder of two long values.

    Remainder of two long values.

    pc

    The pc of the div (/) instruction.

    returns

    The return value is the calculated value and/or (depending on the domain) an ArithmeticException if value2 is 0.

    Definition Classes
    LongValues → LongValuesDomain
  209. def lreturn(pc: Int, value: DomainValue): Computation[Nothing, ExceptionValue]

    The given value, which is a value with computational type long, is returned by the return instruction with the given pc.

    The given value, which is a value with computational type long, is returned by the return instruction with the given pc.

    Definition Classes
    DefaultHandlingForReturnInstructions → ReturnInstructionsDomain
  210. def lshl(pc: Int, longValue: DomainValue, shiftValue: DomainValue): DomainTypedValue[LongType]

    Shift left of a long value.

    Shift left of a long value.

    pc

    The pc of the "shift left" instruction.

    Definition Classes
    LongValuesShiftOperators → LongValuesDomain
  211. def lshr(pc: Int, longValue: DomainValue, shiftValue: DomainValue): DomainTypedValue[LongType]

    Shift right of a long value.

    Shift right of a long value.

    pc

    The pc of the "shift right" instruction.

    Definition Classes
    LongValuesShiftOperators → LongValuesDomain
  212. def lsub(pc: Int, left: DomainValue, right: DomainValue): DomainValue

    Subtraction of two long values.

    Subtraction of two long values.

    pc

    The pc of the sub(-) instruction.

    Definition Classes
    LongValues → LongValuesDomain
  213. def lushr(pc: Int, longValue: DomainValue, shiftValue: DomainValue): DomainTypedValue[LongType]

    Unsigned shift right of a long value.

    Unsigned shift right of a long value.

    pc

    The pc of the "unsigned shift right" instruction.

    Definition Classes
    LongValuesShiftOperators → LongValuesDomain
  214. def lxor(pc: Int, value1: DomainValue, value2: DomainValue): DomainValue

    xor of two long values.

    xor of two long values.

    pc

    The pc of the "xor" instruction.

    value1

    A long value (guaranteed by the JVM's semantics).

    value2

    A long value (guaranteed by the JVM's semantics).

    Definition Classes
    LongValues → LongValuesDomain
  215. def maxCardinalityOfIntegerRanges: Long

    Determines the maximum number of values captured by an integer value range.

    Determines the maximum number of values captured by an integer value range.

    This setting is only used when true ranges are merged; in case of a join of two concrete values we will always create an IntegerRangeLike value. If the cardinality is exceeded, we will also first create ranges based on the boundaries determined by the defaul data types (byte,short,char).

    This setting can be adapted at runtime.

    Definition Classes
    IntegerRangeValues
  216. def mergeDomainValues(pc: Int, v1: DomainValue, v2: DomainValue): DomainValue

    Merges the given domain value v1 with the domain value v2 and returns the merged value which is v1 if v1 is an abstraction of v2, v2 if v2 is an abstraction of v1 or some other value if a new value is computed that abstracts over both values.

    Merges the given domain value v1 with the domain value v2 and returns the merged value which is v1 if v1 is an abstraction of v2, v2 if v2 is an abstraction of v1 or some other value if a new value is computed that abstracts over both values.

    This operation is commutative.

    Definition Classes
    ValuesDomain
  217. def mergeMultipleExceptionValues(pc: Int, v1s: ExceptionValues, v2s: ExceptionValues): ExceptionValues

    Merges those exceptions that have the same upper type bound.

    Merges those exceptions that have the same upper type bound. This ensures that per upper type bound only one ValuesDomain.DomainValue (which may be a MultipleReferenceValues) is used. For those values that are merged, the given pc is used.

    Definition Classes
    TypeLevelReferenceValues
  218. val method: Method

    Returns the method that is currently analyzed.

    Returns the method that is currently analyzed.

    Definition Classes
    DefaultIntervalValuesDomain → TheMethod
  219. def monitorenter(pc: Int, value: DomainValue): Computation[Nothing, ExceptionValue]

    Handles a monitorenter instruction.

    Handles a monitorenter instruction.

    Definition Classes
    IgnoreSynchronization → MonitorInstructionsDomain
    Note

    The default implementation checks if the given value is null and raises an exception if it is null or maybe null.

  220. def monitorexit(pc: Int, value: DomainValue): Computation[Nothing, ExceptionValues]

    Handles a monitorexit instruction.

    Handles a monitorexit instruction.

    Definition Classes
    IgnoreSynchronization → MonitorInstructionsDomain
    Note

    The default implementation checks if the given value is null and raises an exception if it is null or maybe null.

  221. def multianewarray(pc: Int, counts: Operands, arrayType: ArrayType): Computation[DomainArrayValue, ExceptionValue]

    Creates a multi-dimensional array.

    Creates a multi-dimensional array.

    Definition Classes
    TypeLevelReferenceValues → ReferenceValuesDomain
    Note

    The componentType may be (again) an array type.

    ,

    It is generally not necessary to override this method as it handles all cases in a generic manner.

  222. def newarray(pc: Int, count: DomainValue, componentType: FieldType): Computation[DomainValue, ExceptionValue]

    Creates a new array.

    Creates a new array.

    Definition Classes
    TypeLevelReferenceValues → ReferenceValuesDomain
    Note

    It is generally not necessary to override this method as it handles all cases in a generic manner.

  223. val project: Project[Source]

    Returns the project that is currently analyzed.

    Returns the project that is currently analyzed.

    Definition Classes
    DefaultIntervalValuesDomain → TheProject
  224. def properties(pc: Int, valueToString: (AnyRef) => String): Option[String]

    Returns a string representation of the properties associated with the instruction with the respective program counter.

    Returns a string representation of the properties associated with the instruction with the respective program counter.

    Associating properties with an instruction and maintaining those properties is, however, at the sole responsibility of the Domain.

    This method is predefined to facilitate the development of support tools and is not used by the abstract interpretation framework.

    Domains that define (additional) properties should (abstract) override this method and should return a textual representation of the property.

    Definition Classes
    ConstraintsBetweenIntegerValues → ValuesDomain
  225. implicit final lazy val propertyStore: PropertyStore
    Definition Classes
    TheProject → ThePropertyStore
  226. def putConstraintInStore(store: ConstraintsStore, v1: IntegerLikeValue, v2: IntegerLikeValue, c: Constraint): ConstraintsStore
    Definition Classes
    ConstraintsBetweenIntegerValues
  227. def putfield(pc: Int, objectref: DomainValue, value: DomainValue, declaringClass: ObjectType, fieldName: String, fieldType: FieldType): Computation[Nothing, ExceptionValue]

    Sets the field's value if the given objectref is not null(in the Domain).

    Sets the field's value if the given objectref is not null(in the Domain). In the latter case a NullPointerException is thrown.

    Definition Classes
    TypeLevelFieldAccessInstructions → FieldAccessesDomain
  228. def putstatic(pc: Int, value: DomainValue, declaringClass: ObjectType, fieldName: String, fieldType: FieldType): Computation[Nothing, Nothing]

    Sets the field's value.

    Sets the field's value.

    Definition Classes
    TypeLevelFieldAccessInstructions → FieldAccessesDomain
  229. def refAreEqual(pc: Int, value1: DomainValue, value2: DomainValue): Answer

    Tests if both values refer to the same object instance.

    Tests if both values refer to the same object instance.

    Though this is in general intractable, there are some cases where a definitive answer is possible.

    This implementation completely handles the case where at least one value definitively represents the null value. Additionally, if we have precise type information and the types are different, No is returned. Otherwise, Unknown is returned.

    value1

    A value of type ReferenceValue.

    value2

    A value of type ReferenceValue.

    Definition Classes
    TypeLevelReferenceValues → ReferenceValuesDomain
    Note

    This method is intended to be overridden by subclasses and may be the first one that is called (by means of super) by the overriding method to handle checks related to null. E.g.

    super.areEqualReferences(value1,value2).ifUnknown {
    ...
}
  230. def refAreNotEqual(pc: Int, value1: DomainValue, value2: DomainValue): Answer

    Compares the given values for reference inequality.

    Compares the given values for reference inequality. Returns No if both values point to the same instance and returns Yes if both objects are known not to point to the same instance. The latter is, e.g., trivially the case when both values have a different concrete type. Otherwise Unknown is returned.

    If both values are representing the null value the org.opalj.Answer is Yes.

    value1

    A value of computational type reference.

    value2

    A value of computational type reference.

    Definition Classes
    ReferenceValuesDomain
  231. def refEstablishAreEqual(pc: Int, value1: DomainValue, value2: DomainValue, operands: Operands, locals: Locals): (Operands, Locals)

    Called by OPAL when two values were compared for reference equality and we are going to analyze the branch where the comparison succeeded.

    Called by OPAL when two values were compared for reference equality and we are going to analyze the branch where the comparison succeeded.

    Definition Classes
    ReferenceValuesDomain
  232. def refEstablishAreNotEqual(pc: Int, value1: DomainValue, value2: DomainValue, operands: Operands, locals: Locals): (Operands, Locals)

    Called by OPAL when two values were compared for reference equality and we are going to analyze the branch where the comparison failed.

    Called by OPAL when two values were compared for reference equality and we are going to analyze the branch where the comparison failed.

    Definition Classes
    ReferenceValuesDomain
  233. def refEstablishIsNonNull(pc: Int, value: DomainValue, operands: Operands, locals: Locals): (Operands, Locals)

    Called by OPAL-AI when it establishes that the value is guaranteed not to be null.

    Called by OPAL-AI when it establishes that the value is guaranteed not to be null. E.g., after a comparison with null OPAL can establish that the value has to be null on one branch and that the value is not null on the other branch.

    Definition Classes
    ReferenceValuesDomain
  234. def refEstablishIsNull(pc: Int, value: DomainValue, operands: Operands, locals: Locals): (Operands, Locals)

    Called by the framework when the value is known to be null/has to be null.

    Called by the framework when the value is known to be null/has to be null. E.g., after a comparison with null (IFNULL/IFNONNULL) OPAL-AI knows that the value has to be null on one branch and that the value is not null on the other branch.

    Definition Classes
    ReferenceValuesDomain
  235. def refIsNonNull(pc: Int, value: DomainValue): Answer

    Returns Yes if given value is never null, Unknown if the values is maybe null and No otherwise.

    Returns Yes if given value is never null, Unknown if the values is maybe null and No otherwise.

    value

    A value of computational type reference.

    Definition Classes
    ReferenceValuesDomain
  236. final def refIsNull(pc: Int, value: DomainValue): Answer

    Determines the nullness-property of the given value.

    Determines the nullness-property of the given value.

    value

    A value of type ReferenceValue.

    Definition Classes
    TypeLevelReferenceValues → ReferenceValuesDomain
  237. def refSetUpperTypeBoundOfTopOperand(pc: Int, upperTypeBound: ReferenceType, operands: Operands, locals: Locals): (Operands, Locals)

    Called by the abstract interpreter when the type bound of the top most stack value needs to be refined.

    Called by the abstract interpreter when the type bound of the top most stack value needs to be refined. This method is only called by the abstract interpreter iff an immediately preceding subtype query (typeOf(value) <: bound) returned Unknown. This method must not be ignored – w.r.t. refining the top-most stack value; it is e.g., used by org.opalj.br.instructions.CHECKCAST instructions.

    A domain that is able to identify aliases can use this information to propagate the information to the other aliases.

    Definition Classes
    TypeLevelReferenceValues → ReferenceValuesDomain
  238. def refTopOperandIsNull(pc: Int, operands: Operands, locals: Locals): (Operands, Locals)

    Sets the is null property of the top-most stack value to Yes.

    Sets the is null property of the top-most stack value to Yes. This method is called by the framework when the top-most operand stack value has to be null, but a previous isNull check returned Unknown. E.g., after a org.opalj.br.instructions.CHECKCAST that fails or if a InstanceOf check has succeeded.

    This method can be ignored; i.e., the return value can be (operands,locals). However, a domain that tracks alias information can use this information to propagate the information to the other aliases.

    Definition Classes
    TypeLevelReferenceValues → ReferenceValuesDomain
  239. def returnFromSubroutine(pc: Int, lvIndex: Int): Unit

    pc

    The pc of the ret instruction.

    Definition Classes
    SubroutinesDomain
  240. def returnVoid(pc: Int): Computation[Nothing, ExceptionValue]

    Called when a return instruction with the given pc is reached.

    Called when a return instruction with the given pc is reached. In other words, when the method returns normally.

    Definition Classes
    DefaultHandlingOfVoidReturns → ReturnInstructionsDomain
  241. def saload(pc: Int, index: DomainValue, arrayref: DomainValue): ArrayLoadResult
    Definition Classes
    GeneralizedArrayHandling → ReferenceValuesDomain
  242. def sastore(pc: Int, value: DomainValue, index: DomainValue, arrayref: DomainValue): ArrayStoreResult
    Definition Classes
    GeneralizedArrayHandling → ReferenceValuesDomain
  243. def setCodeStructure(theInstructions: Array[Instruction], theCFJoins: IntTrieSet, liveVariables: LiveVariables): Unit

    Sets the code structure.

    Sets the code structure.

    This method is called by the AI framework immediately before the interpretation (continues).

    Definition Classes
    ConstraintsBetweenIntegerValues → TheCodeStructure
  244. def summarize(pc: Int, values: Iterable[DomainValue]): DomainValue

    Creates a summary of the given domain values by summarizing and joining the given values.

    Creates a summary of the given domain values by summarizing and joining the given values. For the precise details regarding the calculation of a summary see Value.summarize(...).

    pc

    The program counter that will be used for the summary value if a new value is returned that abstracts over/summarizes the given values.

    values

    An Iterable over one or more values.

    Definition Classes
    ValuesDomain
    Note

    The current algorithm is generic and should satisfy most needs, but it is not very efficient. However, it should be easy to tailor it for a specific domain/domain values, if need be.

  245. 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

    true

    Definition Classes
    ThrowAllPotentialExceptionsConfiguration → Configuration
  246. 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

    true

    Definition Classes
    ThrowAllPotentialExceptionsConfiguration → Configuration
  247. 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

    true

    Definition Classes
    ThrowAllPotentialExceptionsConfiguration → Configuration
  248. 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

    true

    Definition Classes
    ThrowAllPotentialExceptionsConfiguration → Configuration
  249. 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

    true

    Definition Classes
    ThrowAllPotentialExceptionsConfiguration → Configuration
  250. 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.Any

    Definition Classes
    ThrowAllPotentialExceptionsConfiguration → Configuration
  251. 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

    true

    Definition Classes
    ThrowAllPotentialExceptionsConfiguration → Configuration
  252. 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

    true

    Definition Classes
    ThrowAllPotentialExceptionsConfiguration → Configuration
  253. 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

    true

    Definition Classes
    ThrowAllPotentialExceptionsConfiguration → Configuration
  254. 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

    true

    Definition Classes
    ThrowAllPotentialExceptionsConfiguration → Configuration
  255. 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

    true

    Definition Classes
    ThrowAllPotentialExceptionsConfiguration → Configuration
  256. 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

    true

    Definition Classes
    ThrowAllPotentialExceptionsConfiguration → Configuration
  257. 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

    true

    Definition Classes
    ThrowAllPotentialExceptionsConfiguration → Configuration
  258. final def throws(value: ExceptionValue): ThrowsException[ExceptionValue]
    Definition Classes
    ReferenceValuesFactory
  259. def toJavaObject(pc: Int, value: DomainValue): Option[AnyRef]

    Converts – if possible – a given DomainValue to a Java object that is appropriately initialized.

    Converts – if possible – a given DomainValue to a Java object that is appropriately initialized.

    Implementation

    Every domain that supports the creation of a Java object's based on a domain value is expected to implement this method and to test if it can create a precise representation of the given value. If not, the implementation has to delegate the responsibility to the super method to creat an abstract representation.

    abstract override def toJavaObject(value : DomainValue): Option[Object] = {
 if(value...)
     // create and return Java object
 else
     super.toJavaObject(value)
}
    returns

    Some(Object) is returned if it was possible to create a compatible corresponding Java object; otherwise None is returned. Default: None unless the value is null. In the latter case Some(null) is returned.

    Definition Classes
    TypeLevelReferenceValues → AsJavaObject
    Note

    This operation is generally only possible if the domain value maintains enough state information to completely initialize the Java object.

  260. def toString(): String
    Definition Classes
    TheMethod → AnyRef → Any
  261. def updateMemoryLayout(oldValue: DomainValue, newValue: DomainValue, operands: Operands, locals: Locals): (Operands, Locals)

    Replaces all occurrences of oldValue (using reference-quality) with newValue.

    Replaces all occurrences of oldValue (using reference-quality) with newValue. If no occurrences are found, the original operands and locals data structures are returned.

    Definition Classes
    ConstraintsBetweenIntegerValues → CoreDomainFunctionality
  262. case object ALongValue extends (DefaultLongValues.this)#ALongValue with Product with Serializable

    Represents an unspecific, unknown long value.

    Represents an unspecific, unknown long value.

    Definition Classes
    DefaultLongValues
  263. object IntegerRangeLike

    Extractor for IntegerRange values.

    Extractor for IntegerRange values.

    Definition Classes
    IntegerRangeValues
  264. object TheLongValue
    Definition Classes
    LongValues