BytecodeUtils

Value Members

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

   

   Test two objects for inequality.

   Test two objects for inequality.

   returns

   true if !(this == that), false otherwise.

   Definition Classes

   AnyRef → Any

2. final def ##(): Int

   

   Equivalent to x.hashCode except for boxed numeric types and null.

   Equivalent to x.hashCode except for boxed numeric types and null. For numerics, it returns a hash value which is consistent with value equality: if two value type instances compare as true, then ## will produce the same hash value for each of them. For null returns a hashcode where null.hashCode throws a NullPointerException.

   returns

   a hash value consistent with ==

   Definition Classes

   AnyRef → Any

3. final def ==(arg0: Any): Boolean

   

   The expression x == that is equivalent to if (x eq null) that eq null else x.equals(that).

   The expression x == that is equivalent to if (x eq null) that eq null else x.equals(that).

   returns

   true if the receiver object is equivalent to the argument; false otherwise.

   Definition Classes

   AnyRef → Any

4. object ConditionalJump

   

5. object Goto

   

6. object JumpNonJsr

   

7. object VarInstruction

   

8. final def asInstanceOf[T0]: T0

   

   Cast the receiver object to be of type T0.

   Cast the receiver object to be of type T0.

   Note that the success of a cast at runtime is modulo Scala's erasure semantics. Therefore the expression 1.asInstanceOf[String] will throw a ClassCastException at runtime, while the expression List(1).asInstanceOf[List[String]] will not. In the latter example, because the type argument is erased as part of compilation it is not possible to check whether the contents of the list are of the requested type.

   returns

   the receiver object.

   Definition Classes

   Any

   Exceptions thrown

   ClassCastException if the receiver object is not an instance of the erasure of type T0.

9. def clone(): AnyRef

   

   Create a copy of the receiver object.

   Create a copy of the receiver object.

   The default implementation of the clone method is platform dependent.

   returns

   a copy of the receiver object.

   Attributes

   protected[java.lang]

   Definition Classes

   AnyRef

   Annotations

   @throws( ... )

   Note

   not specified by SLS as a member of AnyRef

10. def cloneInstructions(methodNode: MethodNode, labelMap: Map[LabelNode, LabelNode]): (InsnList, Map[AbstractInsnNode, AbstractInsnNode])

    

    Clone the instructions in methodNode into a new InsnList, mapping labels according to the labelMap.

    Clone the instructions in methodNode into a new InsnList, mapping labels according to the labelMap. Returns the new instruction list and a map from old to new instructions.

11. def cloneLabels(methodNode: MethodNode): Map[LabelNode, LabelNode]

    

12. def cloneLocalVariableNodes(methodNode: MethodNode, labelMap: Map[LabelNode, LabelNode], prefix: String): List[LocalVariableNode]

    

    Clone the local variable descriptors of methodNode and map their start and end labels according to the labelMap.

13. def cloneTryCatchBlockNodes(methodNode: MethodNode, labelMap: Map[LabelNode, LabelNode]): List[TryCatchBlockNode]

    

    Clone the local try/catch blocks of methodNode and map their start and end and handler labels according to the labelMap.

14. def codeSizeOKForInlining(caller: MethodNode, callee: MethodNode): Boolean

    

15. def computeMaxLocalsMaxStack(method: MethodNode): Unit

    

    In order to run an Analyzer, the maxLocals / maxStack fields need to be available.

    In order to run an Analyzer, the maxLocals / maxStack fields need to be available. The ASM framework only computes these values during bytecode generation.

    Since there's currently no better way, we run a bytecode generator on the method and extract the computed values. This required changes to the ASM codebase:

    • the MethodWriter class was made public
    • accessors for maxLocals / maxStack were added to the MethodWriter class

    We could probably make this faster (and allocate less memory) by hacking the ASM framework more: create a subclass of MethodWriter with a /dev/null byteVector. Another option would be to create a separate visitor for computing those values, duplicating the functionality from the MethodWriter.

16. final def eq(arg0: AnyRef): Boolean

    

    Tests whether the argument (that) is a reference to the receiver object (this).

    Tests whether the argument (that) is a reference to the receiver object (this).

    The eq method implements an equivalence relation on non-null instances of AnyRef, and has three additional properties:

    • It is consistent: for any non-null instances x and y of type AnyRef, multiple invocations of x.eq(y) consistently returns true or consistently returns false.
    • For any non-null instance x of type AnyRef, x.eq(null) and null.eq(x) returns false.
    • null.eq(null) returns true.

    When overriding the equals or hashCode methods, it is important to ensure that their behavior is consistent with reference equality. Therefore, if two objects are references to each other (o1 eq o2), they should be equal to each other (o1 == o2) and they should hash to the same value (o1.hashCode == o2.hashCode).

    returns

    true if the argument is a reference to the receiver object; false otherwise.

    Definition Classes

    AnyRef

17. def equals(arg0: Any): Boolean

    

    The equality method for reference types.

    The equality method for reference types. Default implementation delegates to eq.

    See also equals in scala.Any.

    returns

    true if the receiver object is equivalent to the argument; false otherwise.

    Definition Classes

    AnyRef → Any

18. def finalJumpTarget(source: JumpInsnNode): LabelNode

    

19. def finalize(): Unit

    

    Called by the garbage collector on the receiver object when there are no more references to the object.

    Called by the garbage collector on the receiver object when there are no more references to the object.

    The details of when and if the finalize method is invoked, as well as the interaction between finalize and non-local returns and exceptions, are all platform dependent.

    Attributes

    protected[java.lang]

    Definition Classes

    AnyRef

    Annotations

    @throws( classOf[java.lang.Throwable] )

    Note

    not specified by SLS as a member of AnyRef

20. def fixLoadedNothingOrNullValue(loadedType: Type, loadInstr: AbstractInsnNode, methodNode: MethodNode, bTypes: BTypes): Unit

    

    This method is used by optimizer components to eliminate phantom values of instruction that load a value of type Nothing$ or Null$.

    This method is used by optimizer components to eliminate phantom values of instruction that load a value of type Nothing$ or Null$. Such values on the stack don't interact well with stack map frames.

    For example, opt.getOrElse(throw e) is re-written to an invocation of the lambda body, a method with return type Nothing$. Similarly for opt.getOrElse(null) and Null$.

    During bytecode generation this is handled by BCodeBodyBuilder.adapt. See the comment in that method which explains the issue with such phantom values.

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

    

    A representation that corresponds to the dynamic class of the receiver object.

    A representation that corresponds to the dynamic class of the receiver object.

    The nature of the representation is platform dependent.

    returns

    a representation that corresponds to the dynamic class of the receiver object.

    Definition Classes

    AnyRef → Any

    Note

    not specified by SLS as a member of AnyRef

22. def getPop(size: Int): InsnNode

    

23. def hashCode(): Int

    

    The hashCode method for reference types.

    The hashCode method for reference types. See hashCode in scala.Any.

    returns

    the hash code value for this object.

    Definition Classes

    AnyRef → Any

24. def instructionResultSize(instruction: AbstractInsnNode): Int

    

25. def isAbstractMethod(methodNode: MethodNode): Boolean

    

26. def isConditionalJump(instruction: AbstractInsnNode): Boolean

    

27. def isConstructor(methodNode: MethodNode): Boolean

    

28. def isExecutable(instruction: AbstractInsnNode): Boolean

    

29. def isFinalClass(classNode: ClassNode): Boolean

    

30. def isFinalMethod(methodNode: MethodNode): Boolean

    

31. final def isInstanceOf[T0]: Boolean

    

    Test whether the dynamic type of the receiver object is T0.

    Test whether the dynamic type of the receiver object is T0.

    Note that the result of the test is modulo Scala's erasure semantics. Therefore the expression 1.isInstanceOf[String] will return false, while the expression List(1).isInstanceOf[List[String]] will return true. In the latter example, because the type argument is erased as part of compilation it is not possible to check whether the contents of the list are of the specified type.

    returns

    true if the receiver object is an instance of erasure of type T0; false otherwise.

    Definition Classes

    Any

32. def isJumpNonJsr(instruction: AbstractInsnNode): Boolean

    

33. def isLoad(instruction: AbstractInsnNode): Boolean

    

34. def isNativeMethod(methodNode: MethodNode): Boolean

    

35. def isReference(t: Type): Boolean

    

36. def isReturn(instruction: AbstractInsnNode): Boolean

    

37. def isStaticMethod(methodNode: MethodNode): Boolean

    

38. def isStore(instruction: AbstractInsnNode): Boolean

    

39. def isStrictfpMethod(methodNode: MethodNode): Boolean

    

40. def isSynchronizedMethod(methodNode: MethodNode): Boolean

    

41. def isVarInstruction(instruction: AbstractInsnNode): Boolean

    

42. def labelReferences(method: MethodNode): Map[LabelNode, Set[AnyRef]]

    

43. final val maxJVMMethodSize: Int(65535)

    

44. final val maxMethodSizeAfterInline: Int

    

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

    

    Equivalent to !(this eq that).

    Equivalent to !(this eq that).

    returns

    true if the argument is not a reference to the receiver object; false otherwise.

    Definition Classes

    AnyRef

46. def negateJumpOpcode(jumpOpcode: Int): Int

    

47. def newLabelNode: LabelNode

    

    Create a new LabelNode with a correctly associated Label.

48. def nextExecutableInstruction(instruction: AbstractInsnNode, alsoKeep: (AbstractInsnNode) ⇒ Boolean = Set()): Option[AbstractInsnNode]

    

49. final def notify(): Unit

    

    Wakes up a single thread that is waiting on the receiver object's monitor.

    Wakes up a single thread that is waiting on the receiver object's monitor.

    Definition Classes

    AnyRef

    Note

    not specified by SLS as a member of AnyRef

50. final def notifyAll(): Unit

    

    Wakes up all threads that are waiting on the receiver object's monitor.

    Wakes up all threads that are waiting on the receiver object's monitor.

    Definition Classes

    AnyRef

    Note

    not specified by SLS as a member of AnyRef

51. def removeJumpAndAdjustStack(method: MethodNode, jump: JumpInsnNode): Unit

    

52. def removeLineNumberNodes(instructions: InsnList): Unit

    

53. def removeLineNumberNodes(classNode: ClassNode): Unit

    

54. def sameTargetExecutableInstruction(a: JumpInsnNode, b: JumpInsnNode): Boolean

    

55. def substituteLabel(reference: AnyRef, from: LabelNode, to: LabelNode): Unit

    

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

    

    Definition Classes

    AnyRef

57. def toString(): String

    

    Creates a String representation of this object.

    Creates a String representation of this object. The default representation is platform dependent. On the java platform it is the concatenation of the class name, "@", and the object's hashcode in hexadecimal.

    returns

    a String representation of the object.

    Definition Classes

    AnyRef → Any

58. final def wait(): Unit

    

    Definition Classes

    AnyRef

    Annotations

    @throws( ... )

59. final def wait(arg0: Long, arg1: Int): Unit

    

    Definition Classes

    AnyRef

    Annotations

    @throws( ... )

60. final def wait(arg0: Long): Unit

    

    Definition Classes

    AnyRef

    Annotations

    @throws( ... )