NullPropertyRefinement

trait NullPropertyRefinement extends CoreDomainFunctionality

Refines a reference's null property if the reference value may be null and this has resulted in a corresponding exception.

Self Type: NullPropertyRefinement with ReferenceValuesDomain with Origin
Source: NullPropertyRefinement.scala

Linear Supertypes

CoreDomainFunctionality, SubroutinesDomain, ValuesDomain, AnyRef, Any

Known Subclasses

DefaultDomain, DefaultDomainWithCFG, DefaultDomainWithCFGAndDefUse, DefaultSetValuesDomain, ChildDefaultDomain, DefaultDomain, DefaultPerformInvocationsDomain, DefaultPerformInvocationsDomainWithCFG, DefaultPerformInvocationsDomainWithCFGAndDefUse, SharedDefaultDomain, L1DefaultDomainWithCFGAndDefUseAndSignatureRefinement

Ordering

Alphabetic
By Inheritance

Inherited

NullPropertyRefinement
CoreDomainFunctionality
SubroutinesDomain
ValuesDomain
AnyRef
Any

Hide All
Show All

Visibility

Public
Protected

Type Members

class IllegalValue extends Value with IsIllegalValue
Represents a value that has no well defined state/type.
Represents a value that has no well defined state/type. Such values are either the result of a join of two incompatible values or if the variable was identified as being dead. IllegalValue's are only found in registers (in the locals).
Attributes
protected
Definition Classes
ValuesDomain
See also
org.opalj.ai.Domain.Value for further details.
trait RETValue extends Value with IsReturnAddressValue
Definition Classes
ValuesDomain
trait ReferenceValue extends TypedValue[ReferenceType] with IsReferenceValue
Definition Classes
ValuesDomain
class ReturnAddressValue extends RETValue
Stores a single return address (i.e., a program counter/index into the code array).
Stores a single return address (i.e., a program counter/index into the code array).
Definition Classes
ValuesDomain
Note
Though the framework completely handles all aspects related to return address values, it is nevertheless necessary that this class inherits from Value as return addresses are stored on the stack/in the registers. However, if the Value trait should be refined, all additional methods may – from the point-of-view of OPAL-AI – just throw an UnsupportedOperationException as these additional methods will never be called by the OPAL-AI.
class ReturnAddressValues extends RETValue
A collection of (not further stored) return address values.
A collection of (not further stored) return address values. Primarily used when we join the executions of subroutines.
Definition Classes
ValuesDomain
trait TypedValue[+T <: Type] extends Value with KnownTypedValue
Definition Classes
ValuesDomain
trait Value extends ValueInformation
Abstracts over a concrete operand stack value or a value stored in one of the local variables/registers.
Abstracts over a concrete operand stack value or a value stored in one of the local variables/registers.
Use Of Value/Dependencies On Value
In general, subclasses and users of a Domain should not have/declare a direct dependency on Value. Instead they should use DomainValue as otherwise extensibility of a Domain may be hampered or even be impossible. The only exceptions are, of course, classes that directly inherit from this class.
Refining Value
If you directly extend/refine this trait (i.e., in a subclass of the Domain trait you write something like trait Value extends super.Value), make sure that you also extend all classes/traits that inherit from this type (this may require a deep mixin composition and that you refine the type DomainType accordingly). However, OPAL was designed such that extending this class should – in general – not be necessary. It may also be easier to encode the desired semantics – as far as possible – as part of the domain.
Implementing Value
Standard inheritance from this trait is always supported and is the primary mechanism to model an abstract domain's lattice w.r.t. some special type of value. In general, the implementation should try to avoid creating new instances of values unless strictly required to model the domain's semantics. This will greatly improve the overall performance as this framework heavily uses reference-based equality checks to speed up the evaluation.
Definition Classes
ValuesDomain
Note
OPAL does not rely on any special equality semantics w.r.t. values and never directly or indirectly calls a Value's equals method. Hence, a domain can encode equality such that it best fits its need. However, some of the provided domains rely on the following semantics for equals: Two domain values have to be equal (==) iff they represent the same information. This includes additional information, such as, the value of the origin. E.g., a value (AnIntegerValue) that represents an arbitrary Integer value has to return true if the domain value with which it is compared also represents an arbitrary Integer value (AnIntegerValue). However, it may still be necessary to use multiple objects to represent an arbitrary integer value if, e.g., constraints should be attached to specific values. For example, after a comparison of an integer value with a predefined value (e.g., AnIntegerValue < 4) it is possible to constrain the respective value on the subsequent paths (< 4 on one path and >= 4 on the other path). To make that possible, it is however necessary to distinguish the AnIntegervalue from some other AnIntegerValue to avoid constraining unrelated values.
public void foo(int a,int b) { if(a < 4) { z = a - 2 // here a is constrained (< 4), b and z are unconstrained } else { z = a + 2 // here a is constrained (>= 4), b and z are unconstrained } }
In general, equals is only defined for values belonging to the same domain. If values need to be compared across domains, they need to be adapted to a target domain first.
abstract type DomainIllegalValue <: (NullPropertyRefinement.this)#IllegalValue with (NullPropertyRefinement.this)#DomainValue
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
abstract type DomainReferenceValue >: Null <: (NullPropertyRefinement.this)#ReferenceValue with (NullPropertyRefinement.this)#DomainTypedValue[ReferenceType]
Definition Classes
ValuesDomain
abstract type DomainReturnAddressValue <: (NullPropertyRefinement.this)#ReturnAddressValue with (NullPropertyRefinement.this)#DomainValue
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
abstract type DomainReturnAddressValues <: (NullPropertyRefinement.this)#ReturnAddressValues with (NullPropertyRefinement.this)#DomainValue
Definition Classes
ValuesDomain
abstract type DomainTypedValue[+T <: Type] >: Null <: (NullPropertyRefinement.this)#DomainValue
Definition Classes
ValuesDomain
abstract type DomainValue >: Null <: (NullPropertyRefinement.this)#Value
Abstracts over the concrete type of Value.
Abstracts over the concrete type of Value. Needs to be refined by traits that inherit from Domain and which extend Domain's Value trait.
Definition Classes
ValuesDomain
type ExceptionValue = (NullPropertyRefinement.this)#DomainReferenceValue
A simple type alias of the type DomainValue; used to facilitate comprehension.
A simple type alias of the type DomainValue; used to facilitate comprehension.
Definition Classes
ValuesDomain
type ExceptionValues = Iterable[(NullPropertyRefinement.this)#ExceptionValue]
A type alias for Iterables of ExceptionValues; used to facilitate comprehension.
A type alias for Iterables of ExceptionValues; used to facilitate comprehension.
Definition Classes
ValuesDomain
type Locals = collection.mutable.Locals[(NullPropertyRefinement.this)#DomainValue]
An instruction's current register values/locals are represented using an array.
An instruction's current register values/locals are represented using an array.
Definition Classes
ValuesDomain
type LocalsArray = Array[(NullPropertyRefinement.this)#Locals]
Definition Classes
ValuesDomain
type Operands = List[(NullPropertyRefinement.this)#DomainValue]
An instruction's operands are represented using a list where the first element of the list represents the top level operand stack value.
An instruction's operands are represented using a list where the first element of the list represents the top level operand stack value.
Definition Classes
ValuesDomain
type OperandsArray = Array[(NullPropertyRefinement.this)#Operands]
Definition Classes
ValuesDomain

Abstract Value Members

abstract val DomainReferenceValueTag: ClassTag[(NullPropertyRefinement.this)#DomainReferenceValue]
The class tag can be used to create type safe arrays or to extract the concrete type of the domain value.
The class tag can be used to create type safe arrays or to extract the concrete type of the domain value.
```
val DomainReferenceValue(v) = value // of type "DomainValue"
// v is now of the type DomainReferenceValue
```
Definition Classes
ValuesDomain
implicit abstract val DomainValueTag: ClassTag[(NullPropertyRefinement.this)#DomainValue]
The class tag for the type DomainValue.
The class tag for the type DomainValue.
Required to generate instances of arrays in which values of type DomainValue can be stored in a type-safe manner.
Initialization
In the sub-trait or class that fixes the type of DomainValue it is necessary to implement this abstract val using:
```
val DomainValueTag : ClassTag[DomainValue] = implicitly
```
(As of Scala 2.10 it is necessary that you do not use implicit in the subclass - it will compile, but fail at runtime.)
Definition Classes
ValuesDomain
abstract def InitializedDomainValue(origin: ValueOrigin, vi: ValueInformation): (NullPropertyRefinement.this)#DomainValue
Creates a domain value from the given value information that represents a properly domain value.
Creates a domain value from the given value information that represents a properly domain value. A representation of a proper value is created even if the value information is provided for an uninitialized value.
Definition Classes
ValuesDomain
Note
This function is only defined for proper values, i.e., it is not defined for void values or illegal values.
,
This method is intended to be overwritten by concrete domains which can represent more information.
abstract def MetaInformationUpdateIllegalValue: MetaInformationUpdate[(NullPropertyRefinement.this)#DomainIllegalValue]
The result of the merge of two incompatible values has to be reported as a MetaInformationUpdate[DomainIllegalValue].
The result of the merge of two incompatible values has to be reported as a MetaInformationUpdate[DomainIllegalValue].
Definition Classes
ValuesDomain
abstract def ReturnAddressValue(address: Int): (NullPropertyRefinement.this)#DomainReturnAddressValue
Factory method to create an instance of a ReturnAddressValue.
Factory method to create an instance of a ReturnAddressValue.
Definition Classes
ValuesDomain
abstract val TheIllegalValue: (NullPropertyRefinement.this)#DomainIllegalValue
The singleton instance of the IllegalValue.
The singleton instance of the IllegalValue.
Definition Classes
ValuesDomain
abstract val TheReturnAddressValues: (NullPropertyRefinement.this)#DomainReturnAddressValues
The singleton instance of ReturnAddressValues
The singleton instance of ReturnAddressValues
Definition Classes
ValuesDomain
implicit abstract def classHierarchy: ClassHierarchy
This project's class hierarchy.
This project's class hierarchy.
Usually, just a redirect to the Project's class hierarchy or the default class hierarchy.
Definition Classes
ValuesDomain

Concrete Value Members

final def !=(arg0: Any): Boolean
Definition Classes
AnyRef → Any
final def ##: Int
Definition Classes
AnyRef → Any
final def ==(arg0: Any): Boolean
Definition Classes
AnyRef → Any
final def StructuralUpdateIllegalValue: StructuralUpdate[Nothing]
The result of merging two values should never be reported as a StructuralUpdate if the computed value is an IllegalValue.
The result of merging two values should never be reported as a StructuralUpdate if the computed value is an IllegalValue. The JVM semantics guarantee that the value will not be used and, hence, continuing the interpretation is meaningless.
Definition Classes
ValuesDomain
Note
This method is solely defined for documentation purposes and to catch implementation errors early on.
def abstractInterpretationEnded(aiResult: AIResult { val domain: NullPropertyRefinement.this.type }): Unit
Called by the abstract interpreter when the abstract interpretation of a method has ended.
Called by the abstract interpreter when the abstract interpretation of a method has ended. The abstract interpretation of a method ends if either the fixpoint is reached or the interpretation was aborted.
By default this method does nothing.
Domains that override this method are expected to also call super.abstractInterpretationEnded(aiResult).
Definition Classes
CoreDomainFunctionality
def afterBaseJoin(pc: Int): Unit
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
def afterEvaluation(pc: Int, instruction: Instruction, oldOperands: (NullPropertyRefinement.this)#Operands, oldLocals: (NullPropertyRefinement.this)#Locals, targetPC: Int, isExceptionalControlFlow: Boolean, forceJoin: Boolean, newOperands: (NullPropertyRefinement.this)#Operands, newLocals: (NullPropertyRefinement.this)#Locals): ((NullPropertyRefinement.this)#Operands, (NullPropertyRefinement.this)#Locals)
This methods is called after the evaluation of the instruction with the given pc with respect to targetPC, but before the values are propagated (joined) and before it is checked whether the interpretation needs to be continued.
This methods is called after the evaluation of the instruction with the given pc with respect to targetPC, but before the values are propagated (joined) and before it is checked whether the interpretation needs to be continued. I.e., if the operands (newOperands) or locals (newLocals) are further refined then the refined operands and locals are joined (if necessary).
Definition Classes
NullPropertyRefinement → 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).
final def asInstanceOf[T0]: T0
Definition Classes
Any
def beforeBaseJoin(pc: Int): Unit
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.
def clone(): AnyRef
Attributes
protected[lang]
Definition Classes
AnyRef
Annotations
@throws(classOf[java.lang.CloneNotSupportedException]) @native() @IntrinsicCandidate()
final def eq(arg0: AnyRef): Boolean
Definition Classes
AnyRef
def equals(arg0: AnyRef): Boolean
Definition Classes
AnyRef → Any
def evaluationCompleted(pc: Int, worklist: List[Int], evaluatedPCs: IntArrayStack, operandsArray: (NullPropertyRefinement.this)#OperandsArray, localsArray: (NullPropertyRefinement.this)#LocalsArray, tracer: Option[AITracer]): Unit
Called by the framework after evaluating the instruction with the given pc.
Called by the framework after evaluating the instruction with the given pc. I.e., the state of all potential successor instructions was updated and the flow method was called – potentially multiple times – accordingly.
By default this method does nothing.
Definition Classes
CoreDomainFunctionality
def flow(currentPC: Int, currentOperands: (NullPropertyRefinement.this)#Operands, currentLocals: (NullPropertyRefinement.this)#Locals, successorPC: Int, isSuccessorScheduled: Answer, isExceptionalControlFlow: Boolean, abruptSubroutineTerminationCount: Int, wasJoinPerformed: Boolean, worklist: List[Int], operandsArray: (NullPropertyRefinement.this)#OperandsArray, localsArray: (NullPropertyRefinement.this)#LocalsArray, tracer: Option[AITracer]): List[Int]
Called by the framework after performing a computation to inform the domain about the result.
Called by the framework after performing a computation to inform the domain about the result. That is, after evaluating the effect of the instruction with currentPC on the current stack and register and (if necessary) joining the updated stack and registers with the stack and registers associated with the instruction successorPC. (Hence, this method is ONLY called for return instructions if the return instruction throws an IllegalMonitorStateException.) This function basically informs the domain about the instruction that may be evaluated next. The flow function is called for every possible successor of the instruction with currentPC. This includes all branch targets as well as those instructions that handle exceptions.
In some cases it will even be the case that flow is called multiple times with the same pair of program counters: (currentPC, successorPC). This may happen, e.g., in case of a switch instruction where multiple values have the same body/target instruction and we do not have precise information about the switch value. E.g., as in the following snippet:
```
switch (i) {  // pc: X => Y (for "1"), Y (for "2"), Y (for "3")
case 1:
case 2:
case 3: System.out.println("Great.");            // pc: Y
default: System.out.println("Not So Great.");    // pc: Z
}
```
The flow function is also called after instructions that are domain independent such as dup and load instructions which just manipulate the registers and stack in a generic way. This enables the domain to precisely follow the evaluation progress and in particular to perform control-flow dependent analyses.
currentPC
The program counter of the instruction that is currently evaluated by the abstract interpreter.
currentOperands
The current operands. I.e., the operand stack before the instruction is evaluated.
currentLocals
The current locals. I.e., the locals before the instruction is evaluated.
successorPC
The program counter of an instruction that is a potential successor of the instruction with currentPC. In general the AI framework adds the pc of the successor instruction to the beginning of the worklist unless it is a join instruction. In this case the pc is added to the end – in the context of the current (sub)routine. Hence, the AI framework first evaluates all paths leading to a join instruction before the join instruction will be evaluated.
isSuccessorScheduled
Yes if the successor instruction is or was scheduled. I.e., Yes is returned if the worklist contains successorPC, No if the worklist does not contain successorPC. Unknown is returned if the AI framework did not process the worklist and doesn't know anything about the scheduled successors. Note that this value is independent of the subroutine in which the value may be scheduled. If an implementation schedules successorPC the the super call has to set isSuccessorScheduled to Yes.
isExceptionalControlFlow
true if and only if the evaluation of the instruction with the program counter currentPC threw an exception; false otherwise. Hence, if this parameter is true the instruction with successorPC is the first instruction of the handler.
abruptSubroutineTerminationCount
> 0 if and only if we have an exceptional control flow that terminates one or more subroutines. In this case the successor instruction is scheduled (if at all) after all subroutines that will be terminated by the exception.
wasJoinPerformed
true if a join was performed. I.e., the successor instruction is an instruction (Code.cfJoins) that was already previously evaluated and where multiple paths potentially join.
worklist
The current list of instructions that will be evaluated next.
If subroutines are not used (i.e., Java >= 5)
If you want to force the evaluation of the instruction with the program counter successorPC it is sufficient to test whether the list already contains successorPC and – if not – to prepend it. If the worklist already contains successorPC then the domain is allowed to move the PC to the beginning of the worklist.
If the code contains subroutines (JSR/RET)
If the PC does not belong to the same (current) (sub)routine, it is not allowed to be moved to the beginning of the worklist. (Subroutines can only be found in code generated by old Java compilers; before Java 6. Subroutines are identified by jsr/ret instructions. A subroutine can be identified by going back in the worklist and by looking for specific "program counters" (e.g., SUBROUTINE_START, SUBROUTINE_END). These program counters mark the beginning of a subroutine. In other words, an instruction can be freely moved around unless a special program counter value is found. All special program counters use negative values. Additionally, neither the negative values nor the positive values between two negative values should be changed. Furthermore, no value (PC) should be put between negative values that capture subroutine information. If the domain updates the worklist, it is the responsibility of the domain to call the tracer and to inform it about the changes. Note that the worklist is not allowed to contain duplicates related to the evaluation of the current (sub-)routine.
operandsArray
The array that associates every instruction with its operand stack that is in effect. Note, that only those elements of the array contain values that are related to instructions that were evaluated in the past; the other elements are null. Furthermore, it identifies the operandsArray of the subroutine that will execute the instruction with successorPC. The operandsArray may be null for the current instruction (not the successor instruction) if the execution of the current instruction leads to the termination of the current subroutine. In this case the information about the operands and locals associated with all instructions belonging to the subroutine is reset.
localsArray
The array that associates every instruction with its current register values. Note, that only those elements of the array contain values that are related to instructions that were evaluated in the past. The other elements are null. Furthermore, it identifies the localsArray of the subroutine that will execute the instruction with successorPC. The localsArray may be null for the current instruction (not the successor instruction) if the execution of the current instruction leads to the termination of the current subroutine. In this case the information about the operands and locals associated with all instructions belonging to the subroutine is reset.
returns
The updated worklist. In most cases this is simply the given worklist. The default case is also to return the given worklist.
Definition Classes
CoreDomainFunctionality
Note
The domain is allowed to modify the worklist, operandsArray and localsArray. However, the AI will not perform any checks. In case of updates of the operandsArray or localsArray it is necessary to first create a shallow copy before updating it. If this is not done, it may happen that the locals associated with other instructions are also updated.
,
A method that overrides this method must always call the super method to ensure that every domain that uses this hook gets informed about a flow.
final def getClass(): Class[_ <: AnyRef]
Definition Classes
AnyRef → Any
Annotations
@native() @IntrinsicCandidate()
def hashCode(): Int
Definition Classes
AnyRef → Any
Annotations
@native() @IntrinsicCandidate()
final def isASubtypeOf(subtype: ReferenceType, supertype: ReferenceType): Answer
Tests if subtype is known to be subtype of supertype.
Tests if subtype is known to be subtype of supertype. See org.opalj.br.ClassHierarchy's isSubtypeOf method for details.
Definition Classes
ValuesDomain
final def isInstanceOf[T0]: Boolean
Definition Classes
Any
final def isSubtypeOf(subtype: ReferenceType, supertype: ReferenceType): Boolean
Tests if subtype is known to be subtype of supertype.
Tests if subtype is known to be subtype of supertype. See org.opalj.br.ClassHierarchy's isSubtypeOf method for details.
Definition Classes
ValuesDomain
def join(pc: Int, thisOperands: (NullPropertyRefinement.this)#Operands, thisLocals: (NullPropertyRefinement.this)#Locals, otherOperands: (NullPropertyRefinement.this)#Operands, otherLocals: (NullPropertyRefinement.this)#Locals): Update[((NullPropertyRefinement.this)#Operands, (NullPropertyRefinement.this)#Locals)]
Joins the given operand stacks and local variables.
Joins the given operand stacks and local variables.
In general there should be no need to refine this method. Overriding this method should only be done for analysis purposes.
Performance
This method heavily relies on reference comparisons to speed up the overall process of performing an abstract interpretation of a method. Hence, a computation should – whenever possible – return (one of) the original object(s) if that value has the same abstract state as the result. Furthermore, if all original values capture the same abstract state as the result of the computation, the "left" value/the value that was already used in the past should be returned.
returns
The joined operand stack and registers. Returns NoUpdate if this memory layout already subsumes the other memory layout.
Definition Classes
CoreDomainFunctionality
Note
The size of the operands stacks that are to be joined and the number of registers/locals that are to be joined can be expected to be identical under the assumption that the bytecode is valid and the framework contains no bugs.
,
The operand stacks are guaranteed to contain compatible values w.r.t. the computational type (unless the bytecode is not valid or OPAL contains an error). I.e., if the result of joining two operand stack values is an IllegalValue we assume that the domain implementation is incorrect. However, the joining of two register values can result in an illegal value - which identifies the value as being dead.
def joinPostProcessing(updateType: UpdateType, pc: Int, oldOperands: (NullPropertyRefinement.this)#Operands, oldLocals: (NullPropertyRefinement.this)#Locals, newOperands: (NullPropertyRefinement.this)#Operands, newLocals: (NullPropertyRefinement.this)#Locals): Update[((NullPropertyRefinement.this)#Operands, (NullPropertyRefinement.this)#Locals)]
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
def joinValues(pc: Int, left: (NullPropertyRefinement.this)#DomainValue, right: (NullPropertyRefinement.this)#DomainValue): Update[(NullPropertyRefinement.this)#DomainValue]
Attributes
protected[this]
Definition Classes
CoreDomainFunctionality
def jumpToSubroutine(pc: Int, branchTarget: Int, returnTarget: Int): Unit
pc
The pc of the jsr(w) instruction.
Definition Classes
SubroutinesDomain
def mergeDomainValues(pc: Int, v1: (NullPropertyRefinement.this)#DomainValue, v2: (NullPropertyRefinement.this)#DomainValue): (NullPropertyRefinement.this)#DomainValue
Merges the given domain value v1 with the domain value v2 and returns the merged value which is v1 if v1 is an abstraction of v2, v2 if v2 is an abstraction of v1 or some other value if a new value is computed that abstracts over both values.
Merges the given domain value v1 with the domain value v2 and returns the merged value which is v1 if v1 is an abstraction of v2, v2 if v2 is an abstraction of v1 or some other value if a new value is computed that abstracts over both values.
This operation is commutative.
Definition Classes
ValuesDomain
final def ne(arg0: AnyRef): Boolean
Definition Classes
AnyRef
final def notify(): Unit
Definition Classes
AnyRef
Annotations
@native() @IntrinsicCandidate()
final def notifyAll(): Unit
Definition Classes
AnyRef
Annotations
@native() @IntrinsicCandidate()
def properties(pc: PC, propertyToString: (AnyRef) => String = p => p.toString): Option[String]
Returns a string representation of the properties associated with the instruction with the respective program counter.
Returns a string representation of the properties associated with the instruction with the respective program counter.
Associating properties with an instruction and maintaining those properties is, however, at the sole responsibility of the Domain.
This method is predefined to facilitate the development of support tools and is not used by the abstract interpretation framework.
Domains that define (additional) properties should (abstract) override this method and should return a textual representation of the property.
Definition Classes
ValuesDomain
def returnFromSubroutine(pc: Int, lvIndex: Int): Unit
pc
The pc of the ret instruction.
Definition Classes
SubroutinesDomain
def schedule(successorPC: Int, abruptSubroutineTerminationCount: Int, worklist: List[Int]): List[Int]
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
def summarize(pc: Int, values: Iterable[(NullPropertyRefinement.this)#DomainValue]): (NullPropertyRefinement.this)#DomainValue
Creates a summary of the given domain values by summarizing and joining the given values.
Creates a summary of the given domain values by summarizing and joining the given values. For the precise details regarding the calculation of a summary see Value.summarize(...).
pc
The program counter that will be used for the summary value if a new value is returned that abstracts over/summarizes the given values.
values
An Iterable over one or more values.
Definition Classes
ValuesDomain
Note
The current algorithm is generic and should satisfy most needs, but it is not very efficient. However, it should be easy to tailor it for a specific domain/domain values, if need be.
final def synchronized[T0](arg0: => T0): T0
Definition Classes
AnyRef
def toString(): String
Definition Classes
AnyRef → Any
def updateMemoryLayout(oldValue: (NullPropertyRefinement.this)#DomainValue, newValue: (NullPropertyRefinement.this)#DomainValue, operands: (NullPropertyRefinement.this)#Operands, locals: (NullPropertyRefinement.this)#Locals): ((NullPropertyRefinement.this)#Operands, (NullPropertyRefinement.this)#Locals)
Replaces all occurrences of oldValue (using reference-quality) with newValue.
Replaces all occurrences of oldValue (using reference-quality) with newValue. If no occurrences are found, the original operands and locals data structures are returned.
Definition Classes
CoreDomainFunctionality
final def wait(arg0: Long, arg1: Int): Unit
Definition Classes
AnyRef
Annotations
@throws(classOf[java.lang.InterruptedException])
final def wait(arg0: Long): Unit
Definition Classes
AnyRef
Annotations
@throws(classOf[java.lang.InterruptedException])
final def wait(): Unit
Definition Classes
AnyRef
Annotations
@throws(classOf[java.lang.InterruptedException])

Deprecated Value Members

def finalize(): Unit
Attributes
protected[lang]
Definition Classes
AnyRef
Annotations
@throws(classOf[java.lang.Throwable]) @Deprecated
Deprecated

Packages

General Design Decisions

Thread Safety

No `null` Values

No Typecasts for Collections

Assertions

Types of Domains

Thread Safety

NullPropertyRefinement

trait NullPropertyRefinement extends CoreDomainFunctionality

Type Members

Use Of Value/Dependencies On Value

Refining Value

Implementing Value

Abstract Value Members

Initialization

Concrete Value Members

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

If the code contains subroutines (JSR/RET)

Performance

Deprecated Value Members

Inherited from CoreDomainFunctionality

Inherited from SubroutinesDomain

Inherited from ValuesDomain

Inherited from AnyRef

Inherited from Any

Ungrouped

Packages

General Design Decisions

Thread Safety

No null Values

No Typecasts for Collections

Assertions

Types of Domains

Thread Safety

NullPropertyRefinement

trait NullPropertyRefinement extends CoreDomainFunctionality

Type Members

Use Of Value/Dependencies On Value

Refining Value

Implementing Value

Abstract Value Members

Initialization

Concrete Value Members

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

If the code contains subroutines (JSR/RET)

Performance

Deprecated Value Members

Inherited from CoreDomainFunctionality

Inherited from SubroutinesDomain

Inherited from ValuesDomain

Inherited from AnyRef

Inherited from Any

Ungrouped

No `null` Values

NullPropertyRefinement