Packages

  • package root
    Definition Classes
    root
  • package org
    Definition Classes
    root
  • package opalj

    OPAL is a Scala-based framework for the static analysis, manipulation and creation of Java bytecode.

    OPAL is a Scala-based framework for the static analysis, manipulation and creation of Java bytecode. OPAL is designed with performance, scalability and adaptability in mind.

    Its main components are:

    • a library (Common) which provides generally useful data-structures and algorithms for static analyses.
    • a framework for implementing lattice based static analyses (Static Analysis Infrastructure)
    • a framework for parsing Java bytecode (Bytecode Infrastructure) that can be used to create arbitrary representations.
    • a library to create a one-to-one in-memory representation of Java bytecode (Bytecode Disassembler).
    • a library to create a representation of Java bytecode that facilitates writing simple static analyses (Bytecode Representation - org.opalj.br).
    • a scalable, easily customizable framework for the abstract interpretation of Java bytecode (Abstract Interpretation Framework - org.opalj.ai).
    • a library to extract dependencies between code elements and to facilitate checking architecture definitions.
    • a library for the lightweight manipulation and creation of Java bytecode (Bytecode Assembler).

    General Design Decisions

    Thread Safety

    Unless explicitly noted, OPAL is thread safe. I.e., the classes defined by OPAL can be considered to be thread safe unless otherwise stated. (For example, it is possible to read and process class files concurrently without explicit synchronization on the client side.)

    No null Values

    Unless explicitly noted, OPAL does not null values I.e., fields that are accessible will never contain null values and methods will never return null. If a method accepts null as a value for a parameter or returns a null value it is always explicitly documented. In general, the behavior of methods that are passed null values is undefined unless explicitly documented.

    No Typecasts for Collections

    For efficiency reasons, OPAL sometimes uses mutable data-structures internally. After construction time, these data-structures are generally represented using their generic interfaces (e.g., scala.collection.{Set,Map}). However, a downcast (e.g., to add/remove elements) is always forbidden as it would effectively prevent thread-safety.

    Assertions

    OPAL makes heavy use of Scala's Assertion Facility to facilitate writing correct code. Hence, for production builds (after thorough testing(!)) it is highly recommend to build OPAL again using -Xdisable-assertions.

    Definition Classes
    org
  • package ba

    Implementation of an eDSL for creating Java bytecode.

    Implementation of an eDSL for creating Java bytecode. The eDSL is designed to facilitate the creation of correct class files; i.e., whenever possible it tries to fill wholes. For example, when an interface is specified the library automatically ensures that the super class type is (initially) set to java.lang.Object as required by the JVM specification.

    This package in particular provides functionality to convert org.opalj.br classes to org.opalj.da classes.

    Definition Classes
    opalj
  • AccessModifier
  • AnnotatedInstructionElement
  • BRConstantsBuffer
  • CATCH
  • CLASS
  • CODE
  • CodeAttributeBuilder
  • CodeElement
  • EXCEPTIONS
  • ExceptionHandlerElement
  • ExceptionHandlerTableBuilder
  • FIELD
  • FIELDS
  • InsertionPosition
  • InstructionElement
  • InstructionLikeElement
  • LINENUMBER
  • LabelElement
  • LabeledCode
  • LineNumberTableBuilder
  • METHOD
  • METHODS
  • PCMapping
  • ProjectBasedInMemoryClassLoader
  • PseudoInstruction
  • TRY
  • TRYEND
  • ToDAConfig

class LabeledCode extends AnyRef

Mutable container for some labeled code. We will use org.opalj.br.instructions.PCLabel labels for those labels which were created based on the original code. This enables the computation ofa mapping from old pcs to new pcs.

Source
LabeledCode.scala
Note

Using LabeledCode is NOT thread safe.

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Instance Constructors

  1. new LabeledCode(originalCode: Code, instructions: ArrayBuffer[CodeElement[AnyRef]])

    originalCode

    The original code.

Value Members

  1. final def !=(arg0: Any): Boolean
    Definition Classes
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  2. final def ##: Int
    Definition Classes
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  3. final def ==(arg0: Any): Boolean
    Definition Classes
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  4. final def asInstanceOf[T0]: T0
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  5. def clone(): AnyRef
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    protected[lang]
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    @throws(classOf[java.lang.CloneNotSupportedException]) @native() @IntrinsicCandidate()
  6. def codeElements: Iterator[CodeElement[AnyRef]]

    Returns a view of the current code elements.

    Returns a view of the current code elements.

    This iterator is not fail-fast and the result is undetermined if – while the iteration is not completed – a change of the code is performed.

  7. final def eq(arg0: AnyRef): Boolean
    Definition Classes
    AnyRef
  8. def equals(arg0: AnyRef): Boolean
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  9. final def getClass(): Class[_ <: AnyRef]
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    @native() @IntrinsicCandidate()
  10. def hashCode(): Int
    Definition Classes
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    @native() @IntrinsicCandidate()
  11. def insert(insertionPC: PC, insertionPosition: InsertionPosition.Value, newInstructions: Seq[CodeElement[AnyRef]]): Unit

    Inserts the given sequence of instructions before, at or after the instruction - identified by a org.opalj.br.instructions.PCLabel - with the given pc.

    Inserts the given sequence of instructions before, at or after the instruction - identified by a org.opalj.br.instructions.PCLabel - with the given pc. CODE objects created by Code.toLabeldCode generally creates org.opalj.br.instructions.PCLabel.

    Here, before means that those instruction which currently jump to the instruction with the given pc, will jump to the first instruction of the given sequence of instructions.

    insertionPC

    The pc of an instruction.

    insertionPosition

    Given an instruction I which is a jump target and which has the pc insertionPC. In this case, the effect of the (insertion) position is: Before insertionPC: // the jump target will be the newly inserted instructions <new instructions> <remaining original instructions> After insertionPC: <original instruction with program counter insertionPC> newJumpTarget(insertionPC+1): // i.e., an instruction which jumps to the original // instruction which follows the instruction with // insertionPC will still jump to that instruction // and not the new one. // Additionally, existing exception handlers which // included the specified instruction will also // include this instruction. <new instructions> pcOfNextInstruction(insertionPC): <remaining original instructions> At newJumpTarget(insertionPC): <new instructions> insertionPC: <remaining original instructions> (W.r.t. labeled code the effect can also be described as shown next: Let's assume that: EH ... code elements modelling exception handlers (TRY|TRYEND|CATCH) I ... the (implicitly referenced) instruction L ... the (implicit) label of the instruction CE ... the new CodeElements Given: EH | L | I // EH can be empty, L is (for original instructions) always existing! Before: EH | L | CE | I At: EH | CE | L | I // existing exception handlers w.r.t. L are effective After: EH | L | I | CE | EH | L+1 // i.e., the insertion position depends on L+1(!) ) Hence, At and After can be used interchangeably except when an instruction should be added at the very beginning or after the end.

    newInstructions

    The sequence of instructions that will be added at the specified position relative to the instruction with the given pc. If this list of instructions contains instructions which have jump targets then these jump targets have to use InstructionLabels which are not used by the code (which are the program counters of the code's instructions). E.g., by using name based labels we will get unique jump targets for instructions.

    Note

    The instructions are only considered to be prototypes and are adapted (in case of jump instructions) if necessary.

    ,

    This method does not provide support for methods that will - if too many instructions are added - exceed the maximum allowed length of methods.

  12. final def isInstanceOf[T0]: Boolean
    Definition Classes
    Any
  13. final def ne(arg0: AnyRef): Boolean
    Definition Classes
    AnyRef
  14. final def notify(): Unit
    Definition Classes
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    @native() @IntrinsicCandidate()
  15. final def notifyAll(): Unit
    Definition Classes
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    Annotations
    @native() @IntrinsicCandidate()
  16. val originalCode: Code
  17. def removedDeadCode(): Unit
  18. def replace(pc: PC, newInstructions: Seq[CodeElement[AnyRef]]): Unit

    Replaces the InstructionLikeElement associate with the given pc by the given instruction sequence.

    Replaces the InstructionLikeElement associate with the given pc by the given instruction sequence. I.e., only the InstructionLikeElement is replaced; all other information associated with the respective program counter (e.g., line number or exception handling related markers) is kept.

    The instruction sequence has to process the values on the stack that would have been processed. Overall the sequence has to be stack-neutral.

  19. def result: CodeAttributeBuilder[AnyRef]

    Creates a new CodeAttributeBuilder based on this LabeledCode; that builder can then be used to construct a valid org.opalj.br.Code attribute.

  20. final def synchronized[T0](arg0: => T0): T0
    Definition Classes
    AnyRef
  21. def toString(): String
    Definition Classes
    LabeledCode → AnyRef → Any
  22. final def wait(arg0: Long, arg1: Int): Unit
    Definition Classes
    AnyRef
    Annotations
    @throws(classOf[java.lang.InterruptedException])
  23. final def wait(arg0: Long): Unit
    Definition Classes
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    Annotations
    @throws(classOf[java.lang.InterruptedException])
  24. final def wait(): Unit
    Definition Classes
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    Annotations
    @throws(classOf[java.lang.InterruptedException])

Deprecated Value Members

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

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