Trait

org.opalj.ai.domain

ConstantFieldValuesResolution

Related Doc: package domain

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trait ConstantFieldValuesResolution extends Domain

Resolves references to final static fields that have simple constant values.

Self Type
ConstantFieldValuesResolution with TheProject with TheClassHierarchy
Source
ConstantFieldValuesResolution.scala
Note

A typical Java compiler automatically resolves all simple references and, hence, this trait has for Java projects in general no effect. If we analyze other languages that compile to the JVM platform, the effect might be different.

Linear Supertypes
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Inherited
  1. ConstantFieldValuesResolution
  2. Domain
  3. Configuration
  4. TypedValuesFactory
  5. PrimitiveValuesConversionsDomain
  6. ReturnInstructionsDomain
  7. MonitorInstructionsDomain
  8. MethodCallsDomain
  9. FieldAccessesDomain
  10. ReferenceValuesDomain
  11. ReferenceValuesFactory
  12. ExceptionsFactory
  13. DoubleValuesDomain
  14. DoubleValuesFactory
  15. FloatValuesDomain
  16. FloatValuesFactory
  17. LongValuesDomain
  18. LongValuesFactory
  19. IntegerValuesDomain
  20. IntegerValuesFactory
  21. CoreDomainFunctionality
  22. SubroutinesDomain
  23. ValuesDomain
  24. AnyRef
  25. Any
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Visibility
  1. Public
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Type Members

  1. type ArrayLoadResult = Computation[(ConstantFieldValuesResolution.this)#DomainValue, (ConstantFieldValuesResolution.this)#ExceptionValues]

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    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
  2. type ArrayStoreResult = Computation[Nothing, (ConstantFieldValuesResolution.this)#ExceptionValues]

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    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
  3. abstract type DomainIllegalValue <: (ConstantFieldValuesResolution.this)#IllegalValue with (ConstantFieldValuesResolution.this)#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
  4. abstract type DomainReferenceValue >: Null <: (ConstantFieldValuesResolution.this)#ReferenceValue with (ConstantFieldValuesResolution.this)#DomainTypedValue[ReferenceType]

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    Definition Classes
    ValuesDomain
  5. abstract type DomainReturnAddressValue <: (ConstantFieldValuesResolution.this)#ReturnAddressValue with (ConstantFieldValuesResolution.this)#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
  6. abstract type DomainReturnAddressValues <: (ConstantFieldValuesResolution.this)#ReturnAddressValues with (ConstantFieldValuesResolution.this)#DomainValue

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    Definition Classes
    ValuesDomain
  7. abstract type DomainTypedValue[+T <: Type] >: Null <: (ConstantFieldValuesResolution.this)#DomainValue

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    Definition Classes
    ValuesDomain
  8. abstract type DomainValue >: Null <: (ConstantFieldValuesResolution.this)#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
  9. type ExceptionValue = (ConstantFieldValuesResolution.this)#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
  10. type ExceptionValues = Iterable[(ConstantFieldValuesResolution.this)#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
  11. 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.

  12. type IntegerValueOrArithmeticException = Computation[(ConstantFieldValuesResolution.this)#DomainValue, (ConstantFieldValuesResolution.this)#ExceptionValue]

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

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

    Definition Classes
    IntegerValuesDomain
  13. type Locals = collection.mutable.Locals[(ConstantFieldValuesResolution.this)#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
  14. type LocalsArray = Array[(ConstantFieldValuesResolution.this)#Locals]

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    Definition Classes
    ValuesDomain
  15. type LongValueOrArithmeticException = Computation[(ConstantFieldValuesResolution.this)#DomainValue, (ConstantFieldValuesResolution.this)#ExceptionValue]

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    Definition Classes
    LongValuesDomain
  16. type MethodCallResult = Computation[(ConstantFieldValuesResolution.this)#DomainValue, (ConstantFieldValuesResolution.this)#ExceptionValues]

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    Definition Classes
    MethodCallsDomain
  17. type Operands = Chain[(ConstantFieldValuesResolution.this)#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
  18. type OperandsArray = Array[(ConstantFieldValuesResolution.this)#Operands]

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    Definition Classes
    ValuesDomain
  19. trait RETValue extends Value

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

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    Definition Classes
    ValuesDomain
  21. 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.

  22. 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
  23. trait TypedValue[+T <: Type] extends Value with KnownType

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    Definition Classes
    ValuesDomain
  24. 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): (ConstantFieldValuesResolution.this)#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): (ConstantFieldValuesResolution.this)#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): (ConstantFieldValuesResolution.this)#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 BooleanValue(origin: ValueOrigin, value: Boolean): (ConstantFieldValuesResolution.this)#DomainTypedValue[CTIntType]

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    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
    IntegerValuesFactory
  5. abstract def BooleanValue(origin: ValueOrigin): (ConstantFieldValuesResolution.this)#DomainTypedValue[CTIntType]

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    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
    IntegerValuesFactory
  6. abstract def ByteValue(origin: ValueOrigin, value: Byte): (ConstantFieldValuesResolution.this)#DomainTypedValue[CTIntType]

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    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
    IntegerValuesFactory
  7. abstract def ByteValue(origin: ValueOrigin): (ConstantFieldValuesResolution.this)#DomainTypedValue[CTIntType]

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    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
    IntegerValuesFactory
  8. abstract def CharValue(origin: ValueOrigin, value: Char): (ConstantFieldValuesResolution.this)#DomainTypedValue[CTIntType]

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    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
    IntegerValuesFactory
  9. abstract def CharValue(origin: ValueOrigin): (ConstantFieldValuesResolution.this)#DomainTypedValue[CTIntType]

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    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
    IntegerValuesFactory
  10. abstract def ClassCastException(origin: ValueOrigin): (ConstantFieldValuesResolution.this)#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
  11. abstract def ClassNotFoundException(origin: ValueOrigin): (ConstantFieldValuesResolution.this)#ExceptionValue

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    Definition Classes
    ExceptionsFactory
  12. abstract def ClassValue(origin: ValueOrigin, t: Type): (ConstantFieldValuesResolution.this)#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
    Definition Classes
    ReferenceValuesFactory
  13. abstract val DomainReferenceValue: ClassTag[(ConstantFieldValuesResolution.this)#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
  14. implicit abstract val DomainValue: ClassTag[(ConstantFieldValuesResolution.this)#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
  15. abstract def DoubleValue(origin: ValueOrigin, value: Double): (ConstantFieldValuesResolution.this)#DomainTypedValue[DoubleType]

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    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
    DoubleValuesFactory
  16. abstract def DoubleValue(origin: ValueOrigin): (ConstantFieldValuesResolution.this)#DomainTypedValue[DoubleType]

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    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
    DoubleValuesFactory
  17. abstract def FloatValue(origin: ValueOrigin, value: Float): (ConstantFieldValuesResolution.this)#DomainTypedValue[FloatType]

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    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
    FloatValuesFactory
  18. abstract def FloatValue(origin: ValueOrigin): (ConstantFieldValuesResolution.this)#DomainTypedValue[FloatType]

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    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
    FloatValuesFactory
  19. abstract def IllegalMonitorStateException(origin: ValueOrigin): (ConstantFieldValuesResolution.this)#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
  20. abstract def InitializedArrayValue(origin: ValueOrigin, arrayType: ArrayType, counts: Chain[Int]): (ConstantFieldValuesResolution.this)#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.

    Definition Classes
    ReferenceValuesFactory
  21. abstract def InitializedObjectValue(origin: ValueOrigin, objectType: ObjectType): (ConstantFieldValuesResolution.this)#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.)
    Definition Classes
    ReferenceValuesFactory
  22. abstract def IntegerValue(origin: ValueOrigin, value: Int): (ConstantFieldValuesResolution.this)#DomainTypedValue[CTIntType]

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    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
    IntegerValuesFactory
  23. abstract def IntegerValue(origin: ValueOrigin): (ConstantFieldValuesResolution.this)#DomainTypedValue[CTIntType]

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    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
    IntegerValuesFactory
  24. abstract def LongValue(origin: ValueOrigin, value: Long): (ConstantFieldValuesResolution.this)#DomainTypedValue[LongType]

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    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
    LongValuesFactory
  25. abstract def LongValue(origin: ValueOrigin): (ConstantFieldValuesResolution.this)#DomainTypedValue[LongType]

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    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
    LongValuesFactory
  26. abstract def MetaInformationUpdateIllegalValue: MetaInformationUpdate[(ConstantFieldValuesResolution.this)#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
  27. abstract def NegativeArraySizeException(origin: ValueOrigin): (ConstantFieldValuesResolution.this)#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
  28. abstract def NewObject(origin: ValueOrigin, objectType: ObjectType): (ConstantFieldValuesResolution.this)#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.)
    Definition Classes
    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).

  29. abstract def NonNullObjectValue(origin: ValueOrigin, objectType: ObjectType): (ConstantFieldValuesResolution.this)#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.)
    Definition Classes
    ReferenceValuesFactory
  30. abstract def NullPointerException(origin: ValueOrigin): (ConstantFieldValuesResolution.this)#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
  31. abstract def NullValue(origin: ValueOrigin): (ConstantFieldValuesResolution.this)#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
    Definition Classes
    ReferenceValuesFactory
  32. abstract def ReferenceValue(origin: ValueOrigin, referenceType: ReferenceType): (ConstantFieldValuesResolution.this)#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
    Definition Classes
    ReferenceValuesFactory
  33. abstract def ReturnAddressValue(address: PC): (ConstantFieldValuesResolution.this)#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
  34. abstract def ShortValue(origin: ValueOrigin, value: Short): (ConstantFieldValuesResolution.this)#DomainTypedValue[CTIntType]

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    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
    IntegerValuesFactory
  35. abstract def ShortValue(origin: ValueOrigin): (ConstantFieldValuesResolution.this)#DomainTypedValue[CTIntType]

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    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
    IntegerValuesFactory
  36. abstract def StringValue(origin: ValueOrigin, value: String): (ConstantFieldValuesResolution.this)#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.)

    Definition Classes
    ReferenceValuesFactory
  37. abstract val TheIllegalValue: (ConstantFieldValuesResolution.this)#DomainIllegalValue

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    The singleton instance of the IllegalValue.

    The singleton instance of the IllegalValue.

    Definition Classes
    ValuesDomain
  38. abstract val TheReturnAddressValues: (ConstantFieldValuesResolution.this)#DomainReturnAddressValues

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    The singleton instance of ReturnAddressValues

    The singleton instance of ReturnAddressValues

    Definition Classes
    ValuesDomain
  39. abstract def Throwable(origin: ValueOrigin): (ConstantFieldValuesResolution.this)#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
  40. abstract def aaload(pc: PC, index: (ConstantFieldValuesResolution.this)#DomainValue, arrayref: (ConstantFieldValuesResolution.this)#DomainValue): (ConstantFieldValuesResolution.this)#ArrayLoadResult

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    Definition Classes
    ReferenceValuesDomain
  41. abstract def aastore(pc: PC, value: (ConstantFieldValuesResolution.this)#DomainValue, index: (ConstantFieldValuesResolution.this)#DomainValue, arrayref: (ConstantFieldValuesResolution.this)#DomainValue): (ConstantFieldValuesResolution.this)#ArrayStoreResult

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    Definition Classes
    ReferenceValuesDomain
  42. abstract def abruptMethodExecution(pc: PC, exceptionValue: (ConstantFieldValuesResolution.this)#ExceptionValue): Unit

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    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
    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.

  43. abstract def areturn(pc: PC, value: (ConstantFieldValuesResolution.this)#DomainValue): Computation[Nothing, (ConstantFieldValuesResolution.this)#ExceptionValue]

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    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
    ReturnInstructionsDomain
  44. abstract def arraylength(pc: PC, arrayref: (ConstantFieldValuesResolution.this)#DomainValue): Computation[(ConstantFieldValuesResolution.this)#DomainValue, (ConstantFieldValuesResolution.this)#ExceptionValue]

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    Returns the array's length or throws a NullPointerException.

    Returns the array's length or throws a NullPointerException.

    Definition Classes
    ReferenceValuesDomain
  45. abstract def baload(pc: PC, index: (ConstantFieldValuesResolution.this)#DomainValue, arrayref: (ConstantFieldValuesResolution.this)#DomainValue): (ConstantFieldValuesResolution.this)#ArrayLoadResult

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    Definition Classes
    ReferenceValuesDomain
  46. abstract def bastore(pc: PC, value: (ConstantFieldValuesResolution.this)#DomainValue, index: (ConstantFieldValuesResolution.this)#DomainValue, arrayref: (ConstantFieldValuesResolution.this)#DomainValue): (ConstantFieldValuesResolution.this)#ArrayStoreResult

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    Definition Classes
    ReferenceValuesDomain
  47. abstract def caload(pc: PC, index: (ConstantFieldValuesResolution.this)#DomainValue, arrayref: (ConstantFieldValuesResolution.this)#DomainValue): (ConstantFieldValuesResolution.this)#ArrayLoadResult

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    Definition Classes
    ReferenceValuesDomain
  48. abstract def castore(pc: PC, value: (ConstantFieldValuesResolution.this)#DomainValue, index: (ConstantFieldValuesResolution.this)#DomainValue, arrayref: (ConstantFieldValuesResolution.this)#DomainValue): (ConstantFieldValuesResolution.this)#ArrayStoreResult

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    Definition Classes
    ReferenceValuesDomain
  49. abstract def d2f(pc: PC, value: (ConstantFieldValuesResolution.this)#DomainValue): (ConstantFieldValuesResolution.this)#DomainValue

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  50. abstract def d2i(pc: PC, value: (ConstantFieldValuesResolution.this)#DomainValue): (ConstantFieldValuesResolution.this)#DomainValue

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  51. abstract def d2l(pc: PC, value: (ConstantFieldValuesResolution.this)#DomainValue): (ConstantFieldValuesResolution.this)#DomainValue

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  52. abstract def dadd(pc: PC, value1: (ConstantFieldValuesResolution.this)#DomainValue, value2: (ConstantFieldValuesResolution.this)#DomainValue): (ConstantFieldValuesResolution.this)#DomainValue

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    Definition Classes
    DoubleValuesDomain
  53. abstract def daload(pc: PC, index: (ConstantFieldValuesResolution.this)#DomainValue, arrayref: (ConstantFieldValuesResolution.this)#DomainValue): (ConstantFieldValuesResolution.this)#ArrayLoadResult

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    Definition Classes
    ReferenceValuesDomain
  54. abstract def dastore(pc: PC, value: (ConstantFieldValuesResolution.this)#DomainValue, index: (ConstantFieldValuesResolution.this)#DomainValue, arrayref: (ConstantFieldValuesResolution.this)#DomainValue): (ConstantFieldValuesResolution.this)#ArrayStoreResult

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    Definition Classes
    ReferenceValuesDomain
  55. abstract def dcmpg(pc: PC, value1: (ConstantFieldValuesResolution.this)#DomainValue, value2: (ConstantFieldValuesResolution.this)#DomainValue): (ConstantFieldValuesResolution.this)#DomainValue

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    Definition Classes
    DoubleValuesDomain
  56. abstract def dcmpl(pc: PC, value1: (ConstantFieldValuesResolution.this)#DomainValue, value2: (ConstantFieldValuesResolution.this)#DomainValue): (ConstantFieldValuesResolution.this)#DomainValue

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    Definition Classes
    DoubleValuesDomain
  57. abstract def ddiv(pc: PC, value1: (ConstantFieldValuesResolution.this)#DomainValue, value2: (ConstantFieldValuesResolution.this)#DomainValue): (ConstantFieldValuesResolution.this)#DomainValue

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    Definition Classes
    DoubleValuesDomain
  58. abstract def dmul(pc: PC, value1: (ConstantFieldValuesResolution.this)#DomainValue, value2: (ConstantFieldValuesResolution.this)#DomainValue): (ConstantFieldValuesResolution.this)#DomainValue

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    Definition Classes
    DoubleValuesDomain
  59. abstract def dneg(pc: PC, value: (ConstantFieldValuesResolution.this)#DomainValue): (ConstantFieldValuesResolution.this)#DomainValue

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    Definition Classes
    DoubleValuesDomain
  60. abstract def drem(pc: PC, value1: (ConstantFieldValuesResolution.this)#DomainValue, value2: (ConstantFieldValuesResolution.this)#DomainValue): (ConstantFieldValuesResolution.this)#DomainValue

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    Definition Classes
    DoubleValuesDomain
  61. abstract def dreturn(pc: PC, value: (ConstantFieldValuesResolution.this)#DomainValue): Computation[Nothing, (ConstantFieldValuesResolution.this)#ExceptionValue]

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    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
    ReturnInstructionsDomain
  62. abstract def dsub(pc: PC, value1: (ConstantFieldValuesResolution.this)#DomainValue, value2: (ConstantFieldValuesResolution.this)#DomainValue): (ConstantFieldValuesResolution.this)#DomainValue

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    Definition Classes
    DoubleValuesDomain
  63. abstract def f2d(pc: PC, value: (ConstantFieldValuesResolution.this)#DomainValue): (ConstantFieldValuesResolution.this)#DomainValue

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  64. abstract def f2i(pc: PC, value: (ConstantFieldValuesResolution.this)#DomainValue): (ConstantFieldValuesResolution.this)#DomainValue

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  65. abstract def f2l(pc: PC, value: (ConstantFieldValuesResolution.this)#DomainValue): (ConstantFieldValuesResolution.this)#DomainValue

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  66. abstract def fadd(pc: PC, value1: (ConstantFieldValuesResolution.this)#DomainValue, value2: (ConstantFieldValuesResolution.this)#DomainValue): (ConstantFieldValuesResolution.this)#DomainValue

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    Definition Classes
    FloatValuesDomain
  67. abstract def faload(pc: PC, index: (ConstantFieldValuesResolution.this)#DomainValue, arrayref: (ConstantFieldValuesResolution.this)#DomainValue): (ConstantFieldValuesResolution.this)#ArrayLoadResult

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    Definition Classes
    ReferenceValuesDomain
  68. abstract def fastore(pc: PC, value: (ConstantFieldValuesResolution.this)#DomainValue, index: (ConstantFieldValuesResolution.this)#DomainValue, arrayref: (ConstantFieldValuesResolution.this)#DomainValue): (ConstantFieldValuesResolution.this)#ArrayStoreResult

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    Definition Classes
    ReferenceValuesDomain
  69. abstract def fcmpg(pc: PC, value1: (ConstantFieldValuesResolution.this)#DomainValue, value2: (ConstantFieldValuesResolution.this)#DomainValue): (ConstantFieldValuesResolution.this)#DomainValue

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    Definition Classes
    FloatValuesDomain
  70. abstract def fcmpl(pc: PC, value1: (ConstantFieldValuesResolution.this)#DomainValue, value2: (ConstantFieldValuesResolution.this)#DomainValue): (ConstantFieldValuesResolution.this)#DomainValue

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    Definition Classes
    FloatValuesDomain
  71. abstract def fdiv(pc: PC, value1: (ConstantFieldValuesResolution.this)#DomainValue, value2: (ConstantFieldValuesResolution.this)#DomainValue): (ConstantFieldValuesResolution.this)#DomainValue

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    Definition Classes
    FloatValuesDomain
  72. abstract def fmul(pc: PC, value1: (ConstantFieldValuesResolution.this)#DomainValue, value2: (ConstantFieldValuesResolution.this)#DomainValue): (ConstantFieldValuesResolution.this)#DomainValue

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    Definition Classes
    FloatValuesDomain
  73. abstract def fneg(pc: PC, value: (ConstantFieldValuesResolution.this)#DomainValue): (ConstantFieldValuesResolution.this)#DomainValue

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    Definition Classes
    FloatValuesDomain
  74. abstract def frem(pc: PC, value1: (ConstantFieldValuesResolution.this)#DomainValue, value2: (ConstantFieldValuesResolution.this)#DomainValue): (ConstantFieldValuesResolution.this)#DomainValue

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    Definition Classes
    FloatValuesDomain
  75. abstract def freturn(pc: PC, value: (ConstantFieldValuesResolution.this)#DomainValue): Computation[Nothing, (ConstantFieldValuesResolution.this)#ExceptionValue]

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    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
    ReturnInstructionsDomain
  76. abstract def fsub(pc: PC, value1: (ConstantFieldValuesResolution.this)#DomainValue, value2: (ConstantFieldValuesResolution.this)#DomainValue): (ConstantFieldValuesResolution.this)#DomainValue

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    Definition Classes
    FloatValuesDomain
  77. abstract def getfield(pc: PC, objectref: (ConstantFieldValuesResolution.this)#DomainValue, declaringClass: ObjectType, name: String, fieldType: FieldType): Computation[(ConstantFieldValuesResolution.this)#DomainValue, (ConstantFieldValuesResolution.this)#ExceptionValue]

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    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
    FieldAccessesDomain
  78. abstract def i2b(pc: PC, value: (ConstantFieldValuesResolution.this)#DomainValue): (ConstantFieldValuesResolution.this)#DomainValue

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    Definition Classes
    IntegerValuesDomain
  79. abstract def i2c(pc: PC, value: (ConstantFieldValuesResolution.this)#DomainValue): (ConstantFieldValuesResolution.this)#DomainValue

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    Definition Classes
    IntegerValuesDomain
  80. abstract def i2d(pc: PC, value: (ConstantFieldValuesResolution.this)#DomainValue): (ConstantFieldValuesResolution.this)#DomainValue

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  81. abstract def i2f(pc: PC, value: (ConstantFieldValuesResolution.this)#DomainValue): (ConstantFieldValuesResolution.this)#DomainValue

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  82. abstract def i2l(pc: PC, value: (ConstantFieldValuesResolution.this)#DomainValue): (ConstantFieldValuesResolution.this)#DomainValue

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  83. abstract def i2s(pc: PC, value: (ConstantFieldValuesResolution.this)#DomainValue): (ConstantFieldValuesResolution.this)#DomainValue

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    Definition Classes
    IntegerValuesDomain
  84. abstract def iadd(pc: PC, value1: (ConstantFieldValuesResolution.this)#DomainValue, value2: (ConstantFieldValuesResolution.this)#DomainValue): (ConstantFieldValuesResolution.this)#DomainValue

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    Definition Classes
    IntegerValuesDomain
  85. abstract def iaload(pc: PC, index: (ConstantFieldValuesResolution.this)#DomainValue, arrayref: (ConstantFieldValuesResolution.this)#DomainValue): (ConstantFieldValuesResolution.this)#ArrayLoadResult

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    Definition Classes
    ReferenceValuesDomain
  86. abstract def iand(pc: PC, value1: (ConstantFieldValuesResolution.this)#DomainValue, value2: (ConstantFieldValuesResolution.this)#DomainValue): (ConstantFieldValuesResolution.this)#DomainValue

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    Definition Classes
    IntegerValuesDomain
  87. abstract def iastore(pc: PC, value: (ConstantFieldValuesResolution.this)#DomainValue, index: (ConstantFieldValuesResolution.this)#DomainValue, arrayref: (ConstantFieldValuesResolution.this)#DomainValue): (ConstantFieldValuesResolution.this)#ArrayStoreResult

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    Definition Classes
    ReferenceValuesDomain
  88. abstract def idiv(pc: PC, value1: (ConstantFieldValuesResolution.this)#DomainValue, value2: (ConstantFieldValuesResolution.this)#DomainValue): (ConstantFieldValuesResolution.this)#IntegerValueOrArithmeticException

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    Definition Classes
    IntegerValuesDomain
  89. abstract def iinc(pc: PC, value: (ConstantFieldValuesResolution.this)#DomainValue, increment: Int): (ConstantFieldValuesResolution.this)#DomainValue

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    Definition Classes
    IntegerValuesDomain
  90. abstract def imul(pc: PC, value1: (ConstantFieldValuesResolution.this)#DomainValue, value2: (ConstantFieldValuesResolution.this)#DomainValue): (ConstantFieldValuesResolution.this)#DomainValue

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    Definition Classes
    IntegerValuesDomain
  91. abstract def ineg(pc: PC, value: (ConstantFieldValuesResolution.this)#DomainValue): (ConstantFieldValuesResolution.this)#DomainValue

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    Definition Classes
    IntegerValuesDomain
  92. abstract def intAreEqual(pc: PC, value1: (ConstantFieldValuesResolution.this)#DomainValue, value2: (ConstantFieldValuesResolution.this)#DomainValue): Answer

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    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
    IntegerValuesDomain
  93. abstract def intIsLessThan(pc: PC, smallerValue: (ConstantFieldValuesResolution.this)#DomainValue, largerValue: (ConstantFieldValuesResolution.this)#DomainValue): Answer

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

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

    smallerValue

    A value with computational type integer.

    largerValue

    A value with computational type integer.

    Definition Classes
    IntegerValuesDomain
  94. abstract def intIsLessThanOrEqualTo(pc: PC, smallerOrEqualValue: (ConstantFieldValuesResolution.this)#DomainValue, equalOrLargerValue: (ConstantFieldValuesResolution.this)#DomainValue): Answer

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    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.

    smallerOrEqualValue

    A value with computational type integer.

    equalOrLargerValue

    A value with computational type integer.

    Definition Classes
    IntegerValuesDomain
  95. abstract def intIsSomeValueInRange(pc: PC, value: (ConstantFieldValuesResolution.this)#DomainValue, lowerBound: Int, upperBound: Int): Answer

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    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
    IntegerValuesDomain
  96. abstract def intIsSomeValueNotInRange(pc: PC, value: (ConstantFieldValuesResolution.this)#DomainValue, lowerBound: Int, upperBound: Int): Answer

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    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
    IntegerValuesDomain
  97. abstract def invokedynamic(pc: PC, bootstrapMethod: BootstrapMethod, name: String, methodDescriptor: MethodDescriptor, operands: (ConstantFieldValuesResolution.this)#Operands): (ConstantFieldValuesResolution.this)#MethodCallResult

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    Definition Classes
    MethodCallsDomain
  98. abstract def invokeinterface(pc: PC, declaringClass: ObjectType, name: String, methodDescriptor: MethodDescriptor, operands: (ConstantFieldValuesResolution.this)#Operands): (ConstantFieldValuesResolution.this)#MethodCallResult

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    Definition Classes
    MethodCallsDomain
  99. abstract def invokespecial(pc: PC, declaringClass: ObjectType, isInterface: Boolean, name: String, methodDescriptor: MethodDescriptor, operands: (ConstantFieldValuesResolution.this)#Operands): (ConstantFieldValuesResolution.this)#MethodCallResult

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    Definition Classes
    MethodCallsDomain
  100. abstract def invokestatic(pc: PC, declaringClass: ObjectType, isInterface: Boolean, name: String, methodDescriptor: MethodDescriptor, operands: (ConstantFieldValuesResolution.this)#Operands): (ConstantFieldValuesResolution.this)#MethodCallResult

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    Definition Classes
    MethodCallsDomain
  101. abstract def invokevirtual(pc: PC, declaringClass: ReferenceType, name: String, methodDescriptor: MethodDescriptor, operands: (ConstantFieldValuesResolution.this)#Operands): (ConstantFieldValuesResolution.this)#MethodCallResult

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    Definition Classes
    MethodCallsDomain
  102. abstract def ior(pc: PC, value1: (ConstantFieldValuesResolution.this)#DomainValue, value2: (ConstantFieldValuesResolution.this)#DomainValue): (ConstantFieldValuesResolution.this)#DomainValue

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    Definition Classes
    IntegerValuesDomain
  103. abstract def irem(pc: PC, value1: (ConstantFieldValuesResolution.this)#DomainValue, value2: (ConstantFieldValuesResolution.this)#DomainValue): (ConstantFieldValuesResolution.this)#IntegerValueOrArithmeticException

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    Definition Classes
    IntegerValuesDomain
  104. abstract def ireturn(pc: PC, value: (ConstantFieldValuesResolution.this)#DomainValue): Computation[Nothing, (ConstantFieldValuesResolution.this)#ExceptionValue]

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    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
    ReturnInstructionsDomain
  105. abstract def isSubtypeOf(subtype: ReferenceType, supertype: ReferenceType): Answer

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    Tries to determine if the type referred to as subtype is a subtype of the specified reference type supertype.

    Tries to determine if the type referred to as subtype is a subtype of the specified reference type supertype. If the class hierarchy is not complete the answer may be Unknown.

    Definition Classes
    ReferenceValuesDomain
  106. abstract def isValueSubtypeOf(value: (ConstantFieldValuesResolution.this)#DomainValue, supertype: ReferenceType): Answer

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    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
    ReferenceValuesDomain
    Note

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

  107. abstract def ishl(pc: PC, value1: (ConstantFieldValuesResolution.this)#DomainValue, value2: (ConstantFieldValuesResolution.this)#DomainValue): (ConstantFieldValuesResolution.this)#DomainValue

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    Definition Classes
    IntegerValuesDomain
  108. abstract def ishr(pc: PC, value1: (ConstantFieldValuesResolution.this)#DomainValue, value2: (ConstantFieldValuesResolution.this)#DomainValue): (ConstantFieldValuesResolution.this)#DomainValue

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    Definition Classes
    IntegerValuesDomain
  109. abstract def isub(pc: PC, value1: (ConstantFieldValuesResolution.this)#DomainValue, value2: (ConstantFieldValuesResolution.this)#DomainValue): (ConstantFieldValuesResolution.this)#DomainValue

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    Definition Classes
    IntegerValuesDomain
  110. abstract def iushr(pc: PC, value1: (ConstantFieldValuesResolution.this)#DomainValue, value2: (ConstantFieldValuesResolution.this)#DomainValue): (ConstantFieldValuesResolution.this)#DomainValue

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    Definition Classes
    IntegerValuesDomain
  111. abstract def ixor(pc: PC, value1: (ConstantFieldValuesResolution.this)#DomainValue, value2: (ConstantFieldValuesResolution.this)#DomainValue): (ConstantFieldValuesResolution.this)#DomainValue

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    Definition Classes
    IntegerValuesDomain
  112. abstract def l2d(pc: PC, value: (ConstantFieldValuesResolution.this)#DomainValue): (ConstantFieldValuesResolution.this)#DomainValue

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    Conversion of the given long value to a double value.

    Conversion of the given long value to a double value.

    Definition Classes
    PrimitiveValuesConversionsDomain
  113. abstract def l2f(pc: PC, value: (ConstantFieldValuesResolution.this)#DomainValue): (ConstantFieldValuesResolution.this)#DomainValue

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    Conversion of the given long value to a float value.

    Conversion of the given long value to a float value.

    Definition Classes
    PrimitiveValuesConversionsDomain
  114. abstract def l2i(pc: PC, value: (ConstantFieldValuesResolution.this)#DomainValue): (ConstantFieldValuesResolution.this)#DomainValue

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    Conversion of the given long value to an integer value.

    Conversion of the given long value to an integer value.

    Definition Classes
    PrimitiveValuesConversionsDomain
  115. abstract def ladd(pc: PC, value1: (ConstantFieldValuesResolution.this)#DomainValue, value2: (ConstantFieldValuesResolution.this)#DomainValue): (ConstantFieldValuesResolution.this)#DomainValue

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    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
    LongValuesDomain
  116. abstract def laload(pc: PC, index: (ConstantFieldValuesResolution.this)#DomainValue, arrayref: (ConstantFieldValuesResolution.this)#DomainValue): (ConstantFieldValuesResolution.this)#ArrayLoadResult

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    Definition Classes
    ReferenceValuesDomain
  117. abstract def land(pc: PC, value1: (ConstantFieldValuesResolution.this)#DomainValue, value2: (ConstantFieldValuesResolution.this)#DomainValue): (ConstantFieldValuesResolution.this)#DomainValue

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    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
    LongValuesDomain
  118. abstract def lastore(pc: PC, value: (ConstantFieldValuesResolution.this)#DomainValue, index: (ConstantFieldValuesResolution.this)#DomainValue, arrayref: (ConstantFieldValuesResolution.this)#DomainValue): (ConstantFieldValuesResolution.this)#ArrayStoreResult

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    Definition Classes
    ReferenceValuesDomain
  119. abstract def lcmp(pc: PC, value1: (ConstantFieldValuesResolution.this)#DomainValue, value2: (ConstantFieldValuesResolution.this)#DomainValue): (ConstantFieldValuesResolution.this)#DomainValue

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    Comparison (==) of two long values.

    Comparison (==) of two long values.

    pc

    The pc of the comparison instruction.

    value1

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

    value2

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

    returns

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

    Definition Classes
    LongValuesDomain
  120. abstract def ldiv(pc: PC, value1: (ConstantFieldValuesResolution.this)#DomainValue, value2: (ConstantFieldValuesResolution.this)#DomainValue): (ConstantFieldValuesResolution.this)#LongValueOrArithmeticException

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    Division of two long values.

    Division of two long values.

    pc

    The pc of the div (/) instruction.

    value1

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

    value2

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

    returns

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

    Definition Classes
    LongValuesDomain
  121. abstract def lmul(pc: PC, value1: (ConstantFieldValuesResolution.this)#DomainValue, value2: (ConstantFieldValuesResolution.this)#DomainValue): (ConstantFieldValuesResolution.this)#DomainValue

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    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
    LongValuesDomain
  122. abstract def lneg(pc: PC, value: (ConstantFieldValuesResolution.this)#DomainValue): (ConstantFieldValuesResolution.this)#DomainValue

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    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
    LongValuesDomain
  123. abstract def lor(pc: PC, value1: (ConstantFieldValuesResolution.this)#DomainValue, value2: (ConstantFieldValuesResolution.this)#DomainValue): (ConstantFieldValuesResolution.this)#DomainValue

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    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
    LongValuesDomain
  124. abstract def lrem(pc: PC, value1: (ConstantFieldValuesResolution.this)#DomainValue, value2: (ConstantFieldValuesResolution.this)#DomainValue): (ConstantFieldValuesResolution.this)#LongValueOrArithmeticException

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    Remainder of two long values.

    Remainder of two long values.

    pc

    The pc of the div (/) instruction.

    value1

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

    value2

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

    returns

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

    Definition Classes
    LongValuesDomain
  125. abstract def lreturn(pc: PC, value: (ConstantFieldValuesResolution.this)#DomainValue): Computation[Nothing, (ConstantFieldValuesResolution.this)#ExceptionValue]

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    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
    ReturnInstructionsDomain
  126. abstract def lshl(pc: PC, value1: (ConstantFieldValuesResolution.this)#DomainValue, value2: (ConstantFieldValuesResolution.this)#DomainValue): (ConstantFieldValuesResolution.this)#DomainValue

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    Shift left of a long value.

    Shift left of a long value.

    pc

    The pc of the "shift left" instruction.

    value1

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

    value2

    A int value (guaranteed by the JVM's semantics) that determines the number of bits to shift.

    Definition Classes
    LongValuesDomain
  127. abstract def lshr(pc: PC, value1: (ConstantFieldValuesResolution.this)#DomainValue, value2: (ConstantFieldValuesResolution.this)#DomainValue): (ConstantFieldValuesResolution.this)#DomainValue

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    Shift right of a long value.

    Shift right of a long value.

    pc

    The pc of the "shift right" instruction.

    value1

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

    value2

    An int value (guaranteed by the JVM's semantics) that determines the number of bits to shift.

    Definition Classes
    LongValuesDomain
  128. abstract def lsub(pc: PC, value1: (ConstantFieldValuesResolution.this)#DomainValue, value2: (ConstantFieldValuesResolution.this)#DomainValue): (ConstantFieldValuesResolution.this)#DomainValue

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    Subtraction of two long values.

    Subtraction of two long values.

    pc

    The pc of the sub(-) instruction.

    value1

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

    value2

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

    Definition Classes
    LongValuesDomain
  129. abstract def lushr(pc: PC, value1: (ConstantFieldValuesResolution.this)#DomainValue, value2: (ConstantFieldValuesResolution.this)#DomainValue): (ConstantFieldValuesResolution.this)#DomainValue

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    Unsigned shift right of a long value.

    Unsigned shift right of a long value.

    pc

    The pc of the "unsigned shift right" instruction.

    value1

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

    value2

    A int value (guaranteed by the JVM's semantics) that determines the number of bits to shift.

    Definition Classes
    LongValuesDomain
  130. abstract def lxor(pc: PC, value1: (ConstantFieldValuesResolution.this)#DomainValue, value2: (ConstantFieldValuesResolution.this)#DomainValue): (ConstantFieldValuesResolution.this)#DomainValue

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    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
    LongValuesDomain
  131. abstract def monitorenter(pc: PC, value: (ConstantFieldValuesResolution.this)#DomainValue): Computation[Nothing, (ConstantFieldValuesResolution.this)#ExceptionValue]

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    Handles a monitorenter instruction.

    Handles a monitorenter instruction.

    Definition Classes
    MonitorInstructionsDomain
    Note

    A monitor enter instruction may throw a NullPointerException.

  132. abstract def monitorexit(pc: PC, value: (ConstantFieldValuesResolution.this)#DomainValue): Computation[Nothing, (ConstantFieldValuesResolution.this)#ExceptionValues]

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    Handles a monitorexit instruction.

    Handles a monitorexit instruction.

    Definition Classes
    MonitorInstructionsDomain
    Note

    A monitor exit instruction may throw a NullPointerException or an IllegalMonitorStateException.

  133. abstract def multianewarray(pc: PC, counts: (ConstantFieldValuesResolution.this)#Operands, arrayType: ArrayType): Computation[(ConstantFieldValuesResolution.this)#DomainValue, (ConstantFieldValuesResolution.this)#ExceptionValue]

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    Creates a representation of a new multidimensional array.

    Creates a representation of a new multidimensional array. The return value is either a new array or a NegativeArraySizeException if count is negative.

    Definition Classes
    ReferenceValuesDomain
  134. abstract def newarray(pc: PC, count: (ConstantFieldValuesResolution.this)#DomainValue, componentType: FieldType): Computation[(ConstantFieldValuesResolution.this)#DomainValue, (ConstantFieldValuesResolution.this)#ExceptionValue]

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    The return value is either a new array or a NegativeArraySizeException if count is negative.

    The return value is either a new array or a NegativeArraySizeException if count is negative.

    Definition Classes
    ReferenceValuesDomain
  135. abstract def putfield(pc: PC, objectref: (ConstantFieldValuesResolution.this)#DomainValue, value: (ConstantFieldValuesResolution.this)#DomainValue, declaringClass: ObjectType, name: String, fieldType: FieldType): Computation[Nothing, (ConstantFieldValuesResolution.this)#ExceptionValue]

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    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
    FieldAccessesDomain
  136. abstract def putstatic(pc: PC, value: (ConstantFieldValuesResolution.this)#DomainValue, declaringClass: ObjectType, name: String, fieldType: FieldType): Computation[Nothing, Nothing]

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    Sets the field's value.

    Sets the field's value.

    Definition Classes
    FieldAccessesDomain
  137. abstract def refAreEqual(pc: PC, value1: (ConstantFieldValuesResolution.this)#DomainValue, value2: (ConstantFieldValuesResolution.this)#DomainValue): Answer

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    Compares the given values for reference equality.

    Compares the given values for reference equality. Returns Yes if both values point to the same instance and returns No 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
  138. abstract def refIsNull(pc: PC, value: (ConstantFieldValuesResolution.this)#DomainValue): Answer

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    Determines whether the given value is null (Yes), maybe null (Unknown) or is not null (No).

    Determines whether the given value is null (Yes), maybe null (Unknown) or is not null (No).

    value

    A value of computational type reference.

    Definition Classes
    ReferenceValuesDomain
  139. abstract def refSetUpperTypeBoundOfTopOperand(pc: PC, bound: ReferenceType, operands: (ConstantFieldValuesResolution.this)#Operands, locals: (ConstantFieldValuesResolution.this)#Locals): ((ConstantFieldValuesResolution.this)#Operands, (ConstantFieldValuesResolution.this)#Locals)

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    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
    ReferenceValuesDomain
  140. abstract def refTopOperandIsNull(pc: PC, operands: (ConstantFieldValuesResolution.this)#Operands, locals: (ConstantFieldValuesResolution.this)#Locals): ((ConstantFieldValuesResolution.this)#Operands, (ConstantFieldValuesResolution.this)#Locals)

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    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 unless the value is "null".

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

    Definition Classes
    ReferenceValuesDomain
  141. abstract def returnVoid(pc: PC): Computation[Nothing, (ConstantFieldValuesResolution.this)#ExceptionValue]

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    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
    ReturnInstructionsDomain
  142. abstract def saload(pc: PC, index: (ConstantFieldValuesResolution.this)#DomainValue, arrayref: (ConstantFieldValuesResolution.this)#DomainValue): (ConstantFieldValuesResolution.this)#ArrayLoadResult

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    Definition Classes
    ReferenceValuesDomain
  143. abstract def sastore(pc: PC, value: (ConstantFieldValuesResolution.this)#DomainValue, index: (ConstantFieldValuesResolution.this)#DomainValue, arrayref: (ConstantFieldValuesResolution.this)#DomainValue): (ConstantFieldValuesResolution.this)#ArrayStoreResult

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    Definition Classes
    ReferenceValuesDomain
  144. abstract def throwArithmeticExceptions: Boolean

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    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.

    Definition Classes
    Configuration
  145. abstract def throwArrayIndexOutOfBoundsException: Boolean

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    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.

    Definition Classes
    Configuration
  146. abstract def throwArrayStoreException: Boolean

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    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.

    Definition Classes
    Configuration
  147. abstract def throwClassCastException: Boolean

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    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.

    Definition Classes
    Configuration
  148. abstract def throwClassNotFoundException: Boolean

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    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.

    Definition Classes
    Configuration
  149. abstract def throwExceptionsOnMethodCall: ExceptionsRaisedByCalledMethod

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    Determines the behavior how method calls are handled where the exceptions that the called method may throw are unknown.

    Determines the behavior how method calls are handled where the exceptions that the called method may throw are unknown.

    Definition Classes
    Configuration
  150. abstract def throwIllegalMonitorStateException: Boolean

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    If true then monitorexit and the (XXX)return instructions will throw IllegalMonitorStateExceptions unless the analysis is able to determine that the exception is guaranteed 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 to be raised.

    Definition Classes
    Configuration
  151. abstract def throwNegativeArraySizeException: Boolean

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    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.

    Definition Classes
    Configuration
  152. abstract def throwNullPointerExceptionOnArrayAccess: Boolean

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    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.

    Definition Classes
    Configuration
  153. abstract def throwNullPointerExceptionOnFieldAccess: Boolean

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    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.

    Definition Classes
    Configuration
  154. abstract def throwNullPointerExceptionOnMethodCall: Boolean

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    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
    }
    Definition Classes
    Configuration
  155. abstract def throwNullPointerExceptionOnMonitorAccess: Boolean

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    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.

    Definition Classes
    Configuration
  156. abstract def throwNullPointerExceptionOnThrow: Boolean

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    If true a NullPointerExceptions is thrown if the exception that is to be thrown is not not known to be null.

    If true a NullPointerExceptions is thrown if the exception that is to be thrown is not not known to be null.

    Definition Classes
    Configuration

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. final def ConstantFieldValue(pc: PC, cv: ConstantFieldValue[_]): (ConstantFieldValuesResolution.this)#DomainValue

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    Creates the domain value that represents the constant field value.

    Creates the domain value that represents the constant field value.

    Definition Classes
    Domain
  5. final def DefaultValue(origin: ValueOrigin, theType: FieldType): (ConstantFieldValuesResolution.this)#DomainValue

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    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
  6. final def IntegerConstant0: (ConstantFieldValuesResolution.this)#DomainTypedValue[CTIntType]

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    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
  7. def MethodHandle(origin: ValueOrigin, handle: MethodHandle): (ConstantFieldValuesResolution.this)#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.

    Definition Classes
    ReferenceValuesFactory
  8. def MethodType(origin: ValueOrigin, descriptor: MethodDescriptor): (ConstantFieldValuesResolution.this)#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.

    Definition Classes
    ReferenceValuesFactory
  9. 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.

  10. def TypedValue(origin: ValueOrigin, valueType: Type): (ConstantFieldValuesResolution.this)#DomainValue

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    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
  11. final def VMArithmeticException(pc: PC): (ConstantFieldValuesResolution.this)#ExceptionValue

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    Definition Classes
    ExceptionsFactory
  12. final def VMArrayIndexOutOfBoundsException(pc: PC): (ConstantFieldValuesResolution.this)#ExceptionValue

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    Definition Classes
    ExceptionsFactory
  13. final def VMArrayStoreException(pc: PC): (ConstantFieldValuesResolution.this)#ExceptionValue

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    Definition Classes
    ExceptionsFactory
  14. final def VMClassCastException(pc: PC): (ConstantFieldValuesResolution.this)#ExceptionValue

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    Definition Classes
    ExceptionsFactory
  15. final def VMClassNotFoundException(pc: PC): (ConstantFieldValuesResolution.this)#ExceptionValue

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    Definition Classes
    ExceptionsFactory
  16. final def VMIllegalMonitorStateException(pc: PC): (ConstantFieldValuesResolution.this)#ExceptionValue

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    Definition Classes
    ExceptionsFactory
  17. final def VMNegativeArraySizeException(pc: PC): (ConstantFieldValuesResolution.this)#ExceptionValue

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    Definition Classes
    ExceptionsFactory
  18. final def VMNullPointerException(pc: PC): (ConstantFieldValuesResolution.this)#ExceptionValue

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    Definition Classes
    ExceptionsFactory
  19. final def VMThrowable(pc: PC): (ConstantFieldValuesResolution.this)#ExceptionValue

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    Definition Classes
    ExceptionsFactory
  20. def abstractInterpretationEnded(aiResult: AIResult { val domain: org.opalj.ai.<refinement>.type }): Unit

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    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
  21. def afterBaseJoin(pc: PC): Unit

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    This method is called after all values which differ have been joined, but before joinPostProcessing will be called.

    This method is called after all values which differ have been joined, but before joinPostProcessing will be called.

    Attributes
    protected[this]
    Definition Classes
    CoreDomainFunctionality
  22. def afterEvaluation(pc: PC, instruction: Instruction, oldOperands: (ConstantFieldValuesResolution.this)#Operands, oldLocals: (ConstantFieldValuesResolution.this)#Locals, targetPC: PC, isExceptionalControlFlow: Boolean, newOperands: (ConstantFieldValuesResolution.this)#Operands, newLocals: (ConstantFieldValuesResolution.this)#Locals): ((ConstantFieldValuesResolution.this)#Operands, (ConstantFieldValuesResolution.this)#Locals)

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    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).

  23. final def asInstanceOf[T0]: T0

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    Definition Classes
    Any
  24. def beforeBaseJoin(pc: PC): Unit

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    This method is called immediately before a join operation with regard to the specified pc is performed.

    This method is called immediately before a join operation with regard to the specified pc is performed.

    Attributes
    protected[this]
    Definition Classes
    CoreDomainFunctionality
    Note

    This method is intended to be overwritten by clients to perform custom operations.

  25. def clone(): AnyRef

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

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

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    Definition Classes
    AnyRef → Any
  28. def evaluationCompleted(pc: PC, worklist: Chain[PC], evaluated: Chain[PC], operandsArray: (ConstantFieldValuesResolution.this)#OperandsArray, localsArray: (ConstantFieldValuesResolution.this)#LocalsArray, tracer: Option[AITracer]): Unit

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    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
  29. def finalize(): Unit

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    Attributes
    protected[java.lang]
    Definition Classes
    AnyRef
    Annotations
    @throws( classOf[java.lang.Throwable] )
  30. def flow(currentPC: PC, currentOperands: (ConstantFieldValuesResolution.this)#Operands, currentLocals: (ConstantFieldValuesResolution.this)#Locals, successorPC: PC, isSuccessorScheduled: Answer, isExceptionalControlFlow: Boolean, abruptSubroutineTerminationCount: Int, wasJoinPerformed: Boolean, worklist: Chain[PC], operandsArray: (ConstantFieldValuesResolution.this)#OperandsArray, localsArray: (ConstantFieldValuesResolution.this)#LocalsArray, tracer: Option[AITracer]): Chain[PC]

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    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
    CoreDomainFunctionality
    Note

    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.

    ,

    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.

  31. final def getClass(): Class[_]

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    Definition Classes
    AnyRef → Any
  32. def getstatic(pc: PC, classType: ObjectType, fieldName: String, fieldType: FieldType): Computation[(ConstantFieldValuesResolution.this)#DomainValue, Nothing]

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    Returns the field's value.

    Returns the field's value.

    Definition Classes
    ConstantFieldValuesResolutionFieldAccessesDomain
  33. def hashCode(): Int

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    Definition Classes
    AnyRef → Any
  34. def intAreNotEqual(pc: PC, value1: (ConstantFieldValuesResolution.this)#DomainValue, value2: (ConstantFieldValuesResolution.this)#DomainValue): Answer

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    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
  35. def intEstablishAreEqual(pc: PC, value1: (ConstantFieldValuesResolution.this)#DomainValue, value2: (ConstantFieldValuesResolution.this)#DomainValue, operands: (ConstantFieldValuesResolution.this)#Operands, locals: (ConstantFieldValuesResolution.this)#Locals): ((ConstantFieldValuesResolution.this)#Operands, (ConstantFieldValuesResolution.this)#Locals)

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    Definition Classes
    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.

  36. def intEstablishAreNotEqual(pc: PC, value1: (ConstantFieldValuesResolution.this)#DomainValue, value2: (ConstantFieldValuesResolution.this)#DomainValue, operands: (ConstantFieldValuesResolution.this)#Operands, locals: (ConstantFieldValuesResolution.this)#Locals): ((ConstantFieldValuesResolution.this)#Operands, (ConstantFieldValuesResolution.this)#Locals)

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    Definition Classes
    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.

  37. def intEstablishIsLessThan(pc: PC, value1: (ConstantFieldValuesResolution.this)#DomainValue, value2: (ConstantFieldValuesResolution.this)#DomainValue, operands: (ConstantFieldValuesResolution.this)#Operands, locals: (ConstantFieldValuesResolution.this)#Locals): ((ConstantFieldValuesResolution.this)#Operands, (ConstantFieldValuesResolution.this)#Locals)

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    Definition Classes
    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.

  38. def intEstablishIsLessThanOrEqualTo(pc: PC, value1: (ConstantFieldValuesResolution.this)#DomainValue, value2: (ConstantFieldValuesResolution.this)#DomainValue, operands: (ConstantFieldValuesResolution.this)#Operands, locals: (ConstantFieldValuesResolution.this)#Locals): ((ConstantFieldValuesResolution.this)#Operands, (ConstantFieldValuesResolution.this)#Locals)

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    Definition Classes
    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.

  39. def intEstablishValue(pc: PC, theValue: Int, value: (ConstantFieldValuesResolution.this)#DomainValue, operands: (ConstantFieldValuesResolution.this)#Operands, locals: (ConstantFieldValuesResolution.this)#Locals): ((ConstantFieldValuesResolution.this)#Operands, (ConstantFieldValuesResolution.this)#Locals)

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    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
    IntegerValuesDomain
  40. def intIs0(pc: PC, value: (ConstantFieldValuesResolution.this)#DomainValue): Answer

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    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
  41. def intIsGreaterThan(pc: PC, largerValue: (ConstantFieldValuesResolution.this)#DomainValue, smallerValue: (ConstantFieldValuesResolution.this)#DomainValue): Answer

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    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
  42. def intIsGreaterThan0(pc: PC, value: (ConstantFieldValuesResolution.this)#DomainValue): Answer

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    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
  43. def intIsGreaterThanOrEqualTo(pc: PC, largerOrEqualValue: (ConstantFieldValuesResolution.this)#DomainValue, smallerOrEqualValue: (ConstantFieldValuesResolution.this)#DomainValue): Answer

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    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
  44. def intIsGreaterThanOrEqualTo0(pc: PC, value: (ConstantFieldValuesResolution.this)#DomainValue): Answer

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    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
  45. def intIsLessThan0(pc: PC, value: (ConstantFieldValuesResolution.this)#DomainValue): Answer

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    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
  46. def intIsLessThanOrEqualTo0(pc: PC, value: (ConstantFieldValuesResolution.this)#DomainValue): Answer

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    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
  47. def intIsNot0(pc: PC, value: (ConstantFieldValuesResolution.this)#DomainValue): Answer

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    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
  48. final def isInstanceOf[T0]: Boolean

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    Definition Classes
    Any
  49. def join(pc: PC, thisOperands: (ConstantFieldValuesResolution.this)#Operands, thisLocals: (ConstantFieldValuesResolution.this)#Locals, otherOperands: (ConstantFieldValuesResolution.this)#Operands, otherLocals: (ConstantFieldValuesResolution.this)#Locals): Update[((ConstantFieldValuesResolution.this)#Operands, (ConstantFieldValuesResolution.this)#Locals)]

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    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 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.

    ,

    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.

  50. def joinPostProcessing(updateType: UpdateType, pc: PC, oldOperands: (ConstantFieldValuesResolution.this)#Operands, oldLocals: (ConstantFieldValuesResolution.this)#Locals, newOperands: (ConstantFieldValuesResolution.this)#Operands, newLocals: (ConstantFieldValuesResolution.this)#Locals): Update[((ConstantFieldValuesResolution.this)#Operands, (ConstantFieldValuesResolution.this)#Locals)]

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    Enables the customization of the behavior of the base join method.

    Enables the customization of the behavior of the base join method.

    This method in particular enables, in case of a MetaInformationUpdate, to raise the update type to force the continuation of the abstract interpretation process.

    Methods should always override this method and should call the super method.

    updateType

    The current update type. The level can be raised. It is an error to lower the update level.

    oldOperands

    The old operands, before the join. Should not be changed.

    oldLocals

    The old locals, before the join. Should not be changed.

    newOperands

    The new operands; may be updated.

    newLocals

    The new locals; may be updated.

    Attributes
    protected[this]
    Definition Classes
    CoreDomainFunctionality
  51. def joinValues(pc: PC, left: (ConstantFieldValuesResolution.this)#DomainValue, right: (ConstantFieldValuesResolution.this)#DomainValue): Update[(ConstantFieldValuesResolution.this)#DomainValue]

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    Attributes
    protected[this]
    Definition Classes
    CoreDomainFunctionality
  52. def jumpToSubroutine(pc: PC, branchTarget: PC, returnTarget: PC): Unit

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    pc

    The pc of the jsr(w) instruction.

    Definition Classes
    SubroutinesDomain
  53. final def justThrows(value: (ConstantFieldValuesResolution.this)#ExceptionValue): ThrowsException[(ConstantFieldValuesResolution.this)#ExceptionValues]

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    Definition Classes
    ReferenceValuesFactory
  54. def mergeDomainValues(pc: PC, v1: (ConstantFieldValuesResolution.this)#DomainValue, v2: (ConstantFieldValuesResolution.this)#DomainValue): (ConstantFieldValuesResolution.this)#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
  55. final def ne(arg0: AnyRef): Boolean

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

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

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    Definition Classes
    AnyRef
  58. 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
  59. def refAreNotEqual(pc: PC, value1: (ConstantFieldValuesResolution.this)#DomainValue, value2: (ConstantFieldValuesResolution.this)#DomainValue): Answer

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    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
  60. def refEstablishAreEqual(pc: PC, value1: (ConstantFieldValuesResolution.this)#DomainValue, value2: (ConstantFieldValuesResolution.this)#DomainValue, operands: (ConstantFieldValuesResolution.this)#Operands, locals: (ConstantFieldValuesResolution.this)#Locals): ((ConstantFieldValuesResolution.this)#Operands, (ConstantFieldValuesResolution.this)#Locals)

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    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
  61. def refEstablishAreNotEqual(pc: PC, value1: (ConstantFieldValuesResolution.this)#DomainValue, value2: (ConstantFieldValuesResolution.this)#DomainValue, operands: (ConstantFieldValuesResolution.this)#Operands, locals: (ConstantFieldValuesResolution.this)#Locals): ((ConstantFieldValuesResolution.this)#Operands, (ConstantFieldValuesResolution.this)#Locals)

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    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
  62. def refEstablishIsNonNull(pc: PC, value: (ConstantFieldValuesResolution.this)#DomainValue, operands: (ConstantFieldValuesResolution.this)#Operands, locals: (ConstantFieldValuesResolution.this)#Locals): ((ConstantFieldValuesResolution.this)#Operands, (ConstantFieldValuesResolution.this)#Locals)

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    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
  63. def refEstablishIsNull(pc: PC, value: (ConstantFieldValuesResolution.this)#DomainValue, operands: (ConstantFieldValuesResolution.this)#Operands, locals: (ConstantFieldValuesResolution.this)#Locals): ((ConstantFieldValuesResolution.this)#Operands, (ConstantFieldValuesResolution.this)#Locals)

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    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
  64. def refIsNonNull(pc: PC, value: (ConstantFieldValuesResolution.this)#DomainValue): Answer

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    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
  65. def returnFromSubroutine(pc: PC, lvIndex: Int): Unit

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    pc

    The pc of the ret instruction.

    Definition Classes
    SubroutinesDomain
  66. def schedule(successorPC: PC, abruptSubroutineTerminationCount: Int, worklist: Chain[PC]): Chain[PC]

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    This function can be called when the instruction successorPC needs to be scheduled.

    This function can be called when the instruction successorPC needs to be scheduled. The function will test if the instruction is already scheduled and – if so – returns the given worklist. Otherwise the instruction is scheduled in the correct (subroutine-)context.

    Attributes
    protected[this]
    Definition Classes
    CoreDomainFunctionality
  67. def summarize(pc: PC, values: Iterable[(ConstantFieldValuesResolution.this)#DomainValue]): (ConstantFieldValuesResolution.this)#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.

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

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    Definition Classes
    AnyRef
  69. final def throws(value: (ConstantFieldValuesResolution.this)#ExceptionValue): ThrowsException[(ConstantFieldValuesResolution.this)#ExceptionValue]

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    Definition Classes
    ReferenceValuesFactory
  70. def toString(): String

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    Definition Classes
    AnyRef → Any
  71. def typeOfValue(value: (ConstantFieldValuesResolution.this)#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
  72. def updateMemoryLayout(oldValue: (ConstantFieldValuesResolution.this)#DomainValue, newValue: (ConstantFieldValuesResolution.this)#DomainValue, operands: (ConstantFieldValuesResolution.this)#Operands, locals: (ConstantFieldValuesResolution.this)#Locals): ((ConstantFieldValuesResolution.this)#Operands, (ConstantFieldValuesResolution.this)#Locals)

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    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
    CoreDomainFunctionality
  73. final def wait(): Unit

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

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

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    Definition Classes
    AnyRef
    Annotations
    @throws( ... )

Inherited from Domain

Inherited from Configuration

Inherited from TypedValuesFactory

Inherited from MonitorInstructionsDomain

Inherited from MethodCallsDomain

Inherited from FieldAccessesDomain

Inherited from ReferenceValuesDomain

Inherited from ReferenceValuesFactory

Inherited from ExceptionsFactory

Inherited from DoubleValuesDomain

Inherited from DoubleValuesFactory

Inherited from FloatValuesDomain

Inherited from FloatValuesFactory

Inherited from LongValuesDomain

Inherited from LongValuesFactory

Inherited from IntegerValuesDomain

Inherited from IntegerValuesFactory

Inherited from CoreDomainFunctionality

Inherited from SubroutinesDomain

Inherited from ValuesDomain

Inherited from AnyRef

Inherited from Any

Ungrouped