Class ProbeInserter

java.lang.Object
org.objectweb.asm.MethodVisitor
org.jacoco.core.internal.instr.ProbeInserter
All Implemented Interfaces:
IProbeInserter
class ProbeInserter extends org.objectweb.asm.MethodVisitor implements IProbeInserter
Internal utility to add probes into the control flow of a method. The code for a probe simply sets a certain slot of a boolean array to true. In addition the probe array has to be retrieved at the beginning of the method and stored in a local variable. For this two local variables will be reserved immediately after the method parameters - the probe array will be stored in the second one, and the first one is reserved for the case when the last local variable of method parameters is overridden in the method body to store a value of type long or double which occupy two variables.

  • Field Summary

    Fields
    Modifier and Type
    Field
    Description
    private int
    accessorStackSize
    Maximum stack usage of the code to access the probe array.
    private final IProbeArrayStrategy
    arrayStrategy
     
    private final org.objectweb.asm.Label
    beginLabel
    Label for the new beginning of the method
    private final boolean
    clinit
    true if method is a class or interface initialization method.
    private final int
    variable
    Position of the inserted variable.

    Fields inherited from class org.objectweb.asm.MethodVisitor

    api, mv

  • Constructor Summary

    Constructors
    Constructor
    Description
    ProbeInserter(int access, String name, String desc, org.objectweb.asm.MethodVisitor mv, IProbeArrayStrategy arrayStrategy)
    Creates a new ProbeInserter.

  • Method Summary

    Modifier and Type
    Method
    Description
    void
    insertProbe(int id)
    Inserts the probe with the given id.
    private int
    map(int var)
     
    void
    visitCode()
     
    final void
    visitFrame(int type, int nLocal, Object[] local, int nStack, Object[] stack)
     
    final void
    visitIincInsn(int var, int increment)
     
    final void
    visitLocalVariable(String name, String desc, String signature, org.objectweb.asm.Label start, org.objectweb.asm.Label end, int index)
     
    org.objectweb.asm.AnnotationVisitor
    visitLocalVariableAnnotation(int typeRef, org.objectweb.asm.TypePath typePath, org.objectweb.asm.Label[] start, org.objectweb.asm.Label[] end, int[] index, String descriptor, boolean visible)
     
    void
    visitMaxs(int maxStack, int maxLocals)
     
    final void
    visitVarInsn(int opcode, int var)
     

    Methods inherited from class org.objectweb.asm.MethodVisitor

    getDelegate, visitAnnotableParameterCount, visitAnnotation, visitAnnotationDefault, visitAttribute, visitEnd, visitFieldInsn, visitInsn, visitInsnAnnotation, visitIntInsn, visitInvokeDynamicInsn, visitJumpInsn, visitLabel, visitLdcInsn, visitLineNumber, visitLookupSwitchInsn, visitMethodInsn, visitMethodInsn, visitMultiANewArrayInsn, visitParameter, visitParameterAnnotation, visitTableSwitchInsn, visitTryCatchAnnotation, visitTryCatchBlock, visitTypeAnnotation, visitTypeInsn

    Methods inherited from class Object

    clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

  • Field Details

    • arrayStrategy

      private final IProbeArrayStrategy arrayStrategy

    • clinit

      private final boolean clinit
      true if method is a class or interface initialization method.

    • variable

      private final int variable
      Position of the inserted variable.

    • beginLabel

      private final org.objectweb.asm.Label beginLabel
      Label for the new beginning of the method

    • accessorStackSize

      private int accessorStackSize
      Maximum stack usage of the code to access the probe array.

  • Constructor Details

    • ProbeInserter

      ProbeInserter(int access, String name, String desc, org.objectweb.asm.MethodVisitor mv, IProbeArrayStrategy arrayStrategy)
      Creates a new ProbeInserter.
      Parameters:
      access - access flags of the adapted method
      name - the method's name
      desc - the method's descriptor
      mv - the method visitor to which this adapter delegates calls
      arrayStrategy - callback to create the code that retrieves the reference to the probe array

  • Method Details

    • insertProbe

      public void insertProbe(int id)
      Description copied from interface: IProbeInserter
      Inserts the probe with the given id.
      Specified by:
      insertProbe in interface IProbeInserter
      Parameters:
      id - id of the probe to insert

    • visitCode

      public void visitCode()
      Overrides:
      visitCode in class org.objectweb.asm.MethodVisitor

    • visitVarInsn

      public final void visitVarInsn(int opcode, int var)
      Overrides:
      visitVarInsn in class org.objectweb.asm.MethodVisitor

    • visitIincInsn

      public final void visitIincInsn(int var, int increment)
      Overrides:
      visitIincInsn in class org.objectweb.asm.MethodVisitor

    • visitLocalVariable

      public final void visitLocalVariable(String name, String desc, String signature, org.objectweb.asm.Label start, org.objectweb.asm.Label end, int index)
      Overrides:
      visitLocalVariable in class org.objectweb.asm.MethodVisitor

    • visitLocalVariableAnnotation

      public org.objectweb.asm.AnnotationVisitor visitLocalVariableAnnotation(int typeRef, org.objectweb.asm.TypePath typePath, org.objectweb.asm.Label[] start, org.objectweb.asm.Label[] end, int[] index, String descriptor, boolean visible)
      Overrides:
      visitLocalVariableAnnotation in class org.objectweb.asm.MethodVisitor

    • visitMaxs

      public void visitMaxs(int maxStack, int maxLocals)
      Overrides:
      visitMaxs in class org.objectweb.asm.MethodVisitor

    • map

      private int map(int var)

    • visitFrame

      public final void visitFrame(int type, int nLocal, Object[] local, int nStack, Object[] stack)
      Overrides:
      visitFrame in class org.objectweb.asm.MethodVisitor