Trait

org.opalj.ai

ReferenceValuesFactory

Related Doc: package ai

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trait ReferenceValuesFactory extends ExceptionsFactory

Definition of factory methods to create ReferenceValues.

Self Type
ReferenceValuesFactory
Source
ReferenceValuesFactory.scala
Linear Supertypes
Known Subclasses
AnalysisDomain, AnalysisDomain, AnalysisDomain, AnalysisDomain, AnalysisDomain, AnalysisDomain, ArrayValues, BaseBugPickerAnalysisDomain, BaseDomain, BaseDomain, BaseDomainWithDefUse, BaseFieldValuesAnalysisDomain, BaseMethodReturnValuesAnalysisDomain, BasePerformInvocationBugPickerAnalysisDomain, BasicVTACallGraphDomain, BasicVTAWithPreAnalysisCallGraphDomain, CFACallGraphDomain, CalledTaintAnalysisDomain, ChildDefaultDomain, ClassValues, ConstantFieldValuesResolution, CoordinatingValuesDomain, CorrelationalDomain, DefaultArrayValuesBinding, DefaultCHACallGraphDomain, DefaultClassValuesBinding, DefaultDomain, DefaultDomain, DefaultDomain, DefaultDomain, DefaultDomainWithCFG, DefaultDomainWithCFGAndDefUse, DefaultIntervalValuesDomain, DefaultLongSetValues, DefaultPerformInvocationsDomain, DefaultPerformInvocationsDomainWithCFG, DefaultReferenceValuesBinding, DefaultReferenceValuesBinding, DefaultReferenceValuesDomain, DefaultSetValuesDomain, DefaultSingletonValuesDomain, DefaultStringValuesBinding, DefaultTypeLevelIntegerValues, DefaultTypeLevelReferenceValues, DefaultVTACallGraphDomain, Domain, ExceptionUsageAnalysisDomain, ExtVTACallGraphDomain, FPFieldValuesAnalysisDomain, FPMethodReturnValuesAnalysisDomain, FallbackBugPickerAnalysisDomain, GeneralizedArrayHandling, InfiniteRecursionsDomain, InvocationBugPickerAnalysisDomain, MaxArrayLengthRefinement, PrimitiveTACAIDomain, RecordConstraints, ReferenceValues, ReferenceValuesDomain, ReifiedConstraints, RootBugPickerAnalysisDomain, RootTaintAnalysisDomain, SharedDefaultDomain, SharedValuesDomain, StringBuilderValues, StringValues, TaintAnalysisDomain, TypeLevelDomain, TypeLevelIntegerValues, TypeLevelReferenceValues, ValuesCoordinatingDomain, ZeroDomain
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Inherited
  1. ReferenceValuesFactory
  2. ExceptionsFactory
  3. ValuesDomain
  4. AnyRef
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Visibility
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Type Members

  1. abstract type DomainIllegalValue <: IllegalValue with DomainValue

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    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
    ValuesDomain
  2. abstract type DomainReferenceValue >: Null <: ReferenceValue with DomainTypedValue[ReferenceType]

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    Definition Classes
    ValuesDomain
  3. abstract type DomainReturnAddressValue <: ReturnAddressValue with DomainValue

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    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
    ValuesDomain
  4. abstract type DomainReturnAddressValues <: ReturnAddressValues with DomainValue

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    Definition Classes
    ValuesDomain
  5. abstract type DomainTypedValue[+T <: Type] >: Null <: DomainValue

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    Definition Classes
    ValuesDomain
  6. abstract type DomainValue >: Null <: Value

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    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
    ValuesDomain
  7. type ExceptionValue = DomainReferenceValue

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    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
  8. type ExceptionValues = Iterable[ExceptionValue]

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    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
  9. class IllegalValue extends Value

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    Represents a value that has no well defined state/type.

    Represents a value that has no well defined state/type. Such values are the result of a join of two incompatible values and are generally only found in registers (in the locals) and then identify a value that is dead.

    Attributes
    protected
    Definition Classes
    ValuesDomain
    See also

    org.opalj.ai.Domain.Value for further details.

  10. type Locals = collection.mutable.Locals[DomainValue]

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    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
  11. type LocalsArray = Array[Locals]

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    Definition Classes
    ValuesDomain
  12. type Operands = Chain[DomainValue]

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    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
  13. type OperandsArray = Array[Operands]

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    Definition Classes
    ValuesDomain
  14. trait RETValue extends Value

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    Definition Classes
    ValuesDomain
  15. trait ReferenceValue extends TypedValue[ReferenceType] with IsReferenceValue[DomainReferenceValue]

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    Definition Classes
    ValuesDomain
  16. class ReturnAddressValue extends RETValue

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    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 OperationNotSupportedException as these additional methods will never be called by OPAL-AI.

  17. class ReturnAddressValues extends RETValue

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

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

    Definition Classes
    ValuesDomain
  18. trait TypedValue[+T <: Type] extends Value with KnownType

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    Definition Classes
    ValuesDomain
  19. trait Value extends AnyRef

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    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 or eq 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.

Abstract Value Members

  1. abstract def ArithmeticException(origin: ValueOrigin): ExceptionValue

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    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 ValueOriginForVMLevelValue to translate that pc to the appropriate ValueOrigin.

    Definition Classes
    ExceptionsFactory
  2. abstract def ArrayIndexOutOfBoundsException(origin: ValueOrigin): ExceptionValue

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    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 ValueOriginForVMLevelValue to translate that pc to the appropriate ValueOrigin.

    Definition Classes
    ExceptionsFactory
  3. abstract def ArrayStoreException(origin: ValueOrigin): ExceptionValue

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    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 ValueOriginForVMLevelValue to translate that pc to the appropriate ValueOrigin.

    Definition Classes
    ExceptionsFactory
  4. abstract def ClassCastException(origin: ValueOrigin): ExceptionValue

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    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 ValueOriginForVMLevelValue to translate that pc to the appropriate ValueOrigin.

    Definition Classes
    ExceptionsFactory
  5. abstract def ClassNotFoundException(origin: ValueOrigin): ExceptionValue

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    Definition Classes
    ExceptionsFactory
  6. abstract def ClassValue(origin: ValueOrigin, t: Type): DomainReferenceValue

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    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
  7. abstract val DomainReferenceValue: ClassTag[DomainReferenceValue]

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    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
    ValuesDomain
  8. implicit abstract val DomainValue: ClassTag[DomainValue]

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    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
    ValuesDomain
  9. abstract def IllegalMonitorStateException(origin: ValueOrigin): ExceptionValue

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    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 ValueOriginForVMLevelValue to translate that pc to the appropriate ValueOrigin.

    Definition Classes
    ExceptionsFactory
  10. abstract def InitializedArrayValue(origin: ValueOrigin, arrayType: ArrayType, counts: Chain[Int]): DomainReferenceValue

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    Factory method to create a DomainValue that represents an array that was successfully created and which has the given type.

    Factory method to create a DomainValue that represents an array that was successfully created and which has the given type.

    The domain may ignore the information about the origin (pc) and the precise size of each dimension.

    Summary

    The properties of the domain value are:

    • Type: Precise
    • Null: No
    • Content: Unknown
    origin

    Information about the origin of the value.

    counts

    The size of each dimension if available. counts may not be empty but may not contain information about all dimensions; the following condition always has to hold: counts.length <= arrayType.dimensions.

  11. abstract def InitializedObjectValue(origin: ValueOrigin, objectType: ObjectType): DomainReferenceValue

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    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 NullPointExeception 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.)
  12. abstract def MetaInformationUpdateIllegalValue: MetaInformationUpdate[DomainIllegalValue]

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    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
    ValuesDomain
  13. abstract def NegativeArraySizeException(origin: ValueOrigin): ExceptionValue

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    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 ValueOriginForVMLevelValue to translate that pc to the appropriate ValueOrigin.

    Definition Classes
    ExceptionsFactory
  14. abstract def NewObject(origin: ValueOrigin, objectType: ObjectType): DomainReferenceValue

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    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 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.)
    Note

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

  15. abstract def NonNullObjectValue(origin: ValueOrigin, objectType: ObjectType): DomainReferenceValue

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    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.)
  16. abstract def NullPointerException(origin: ValueOrigin): ExceptionValue

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    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 ValueOriginForVMLevelValue to translate that pc to the appropriate ValueOrigin.

    Definition Classes
    ExceptionsFactory
  17. abstract def NullValue(origin: ValueOrigin): DomainReferenceValue

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    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
  18. abstract def ReferenceValue(origin: ValueOrigin, referenceType: ReferenceType): DomainReferenceValue

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    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
  19. abstract def ReturnAddressValue(address: PC): DomainReturnAddressValue

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    Factory method to create an instance of a ReturnAddressValue.

    Factory method to create an instance of a ReturnAddressValue.

    Definition Classes
    ValuesDomain
  20. abstract def StringValue(origin: ValueOrigin, value: String): DomainReferenceValue

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    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.)

  21. abstract val TheIllegalValue: DomainIllegalValue

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    The singleton instance of the IllegalValue.

    The singleton instance of the IllegalValue.

    Definition Classes
    ValuesDomain
  22. abstract val TheReturnAddressValues: DomainReturnAddressValues

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    The singleton instance of ReturnAddressValues

    The singleton instance of ReturnAddressValues

    Definition Classes
    ValuesDomain
  23. abstract def Throwable(origin: ValueOrigin): ExceptionValue

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    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 ValueOriginForVMLevelValue to translate that pc to the appropriate ValueOrigin.

    Definition Classes
    ExceptionsFactory

Concrete Value Members

  1. final def !=(arg0: Any): Boolean

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    Definition Classes
    AnyRef → Any
  2. final def ##(): Int

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    Definition Classes
    AnyRef → Any
  3. final def ==(arg0: Any): Boolean

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    Definition Classes
    AnyRef → Any
  4. def MethodHandle(origin: ValueOrigin, handle: MethodHandle): DomainReferenceValue

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    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.

  5. def MethodType(origin: ValueOrigin, descriptor: MethodDescriptor): DomainReferenceValue

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    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.

  6. final def StructuralUpdateIllegalValue: StructuralUpdate[Nothing]

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    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.

  7. final def VMArithmeticException(pc: PC): ExceptionValue

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    Definition Classes
    ExceptionsFactory
  8. final def VMArrayIndexOutOfBoundsException(pc: PC): ExceptionValue

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    Definition Classes
    ExceptionsFactory
  9. final def VMArrayStoreException(pc: PC): ExceptionValue

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    Definition Classes
    ExceptionsFactory
  10. final def VMClassCastException(pc: PC): ExceptionValue

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    Definition Classes
    ExceptionsFactory
  11. final def VMClassNotFoundException(pc: PC): ExceptionValue

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    Definition Classes
    ExceptionsFactory
  12. final def VMIllegalMonitorStateException(pc: PC): ExceptionValue

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    Definition Classes
    ExceptionsFactory
  13. final def VMNegativeArraySizeException(pc: PC): ExceptionValue

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    Definition Classes
    ExceptionsFactory
  14. final def VMNullPointerException(pc: PC): ExceptionValue

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    Definition Classes
    ExceptionsFactory
  15. final def VMThrowable(pc: PC): ExceptionValue

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    Definition Classes
    ExceptionsFactory
  16. final def asInstanceOf[T0]: T0

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    Definition Classes
    Any
  17. def clone(): AnyRef

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    Attributes
    protected[java.lang]
    Definition Classes
    AnyRef
    Annotations
    @throws( ... )
  18. final def eq(arg0: AnyRef): Boolean

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    Definition Classes
    AnyRef
  19. def equals(arg0: Any): Boolean

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    Definition Classes
    AnyRef → Any
  20. def finalize(): Unit

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    Attributes
    protected[java.lang]
    Definition Classes
    AnyRef
    Annotations
    @throws( classOf[java.lang.Throwable] )
  21. final def getClass(): Class[_]

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    Definition Classes
    AnyRef → Any
  22. def hashCode(): Int

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    Definition Classes
    AnyRef → Any
  23. final def isInstanceOf[T0]: Boolean

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    Definition Classes
    Any
  24. final def justThrows(value: ExceptionValue): ThrowsException[ExceptionValues]

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  25. def mergeDomainValues(pc: PC, v1: DomainValue, v2: DomainValue): DomainValue

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    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
  26. final def ne(arg0: AnyRef): Boolean

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    Definition Classes
    AnyRef
  27. final def notify(): Unit

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    Definition Classes
    AnyRef
  28. final def notifyAll(): Unit

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    Definition Classes
    AnyRef
  29. def properties(pc: PC, propertyToString: (AnyRef) ⇒ String = (v) ⇒ v.toString): Option[String]

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    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
    ValuesDomain
  30. def summarize(pc: PC, values: Iterable[DomainValue]): DomainValue

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    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.

  31. final def synchronized[T0](arg0: ⇒ T0): T0

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    Definition Classes
    AnyRef
  32. final def throws(value: ExceptionValue): ThrowsException[ExceptionValue]

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  33. def toString(): String

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    Definition Classes
    AnyRef → Any
  34. def typeOfValue(value: DomainValue): TypeInformation

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    Returns the type(type bounds) of the given value.

    Returns the type(type bounds) of the given value.

    In general a single value can have multiple type bounds which depend on the control flow. However, all types that the value represents must belong to the same computational type category. I.e., it is possible that the value either has the type "NullPointerException or IllegalArgumentException", but it will never have – at the same time – the (Java) types int and long. Furthermore, it is possible that the returned type(s) is(are) only an upper bound of the real type unless the type is a primitive type.

    This default implementation always returns org.opalj.ai.UnknownType.

    Implementing typeOfValue

    This method is typically not implemented by a single Domain trait/object, but is instead implemented collaboratively by all domains that implement the semantics of certain values. To achieve that, other Domain traits that implement a concrete domain's semantics have to abstract override this method and only return the value's type if the domain knows anything about the type. If a method that overrides this method has no knowledge about the given value, it should delegate this call to its super method.

    Example

    trait FloatValues extends Domain[...] {
      ...
        abstract override def typeOfValue(value: DomainValue): TypesAnswer =
        value match {
          case r: FloatValue ⇒ IsFloatValue
          case _             ⇒ super.typeOfValue(value)
        }
    }
    Definition Classes
    ValuesDomain
  35. final def wait(): Unit

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    Definition Classes
    AnyRef
    Annotations
    @throws( ... )
  36. final def wait(arg0: Long, arg1: Int): Unit

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    Definition Classes
    AnyRef
    Annotations
    @throws( ... )
  37. final def wait(arg0: Long): Unit

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