Class RuleGeneratorAdapter

java.lang.Object
org.objectweb.asm.MethodVisitor
org.jboss.byteman.agent.adapter.RuleMethodAdapter
org.jboss.byteman.agent.adapter.RuleGeneratorAdapter
Direct Known Subclasses:
RuleTriggerMethodAdapter
public class RuleGeneratorAdapter extends RuleMethodAdapter
A modified version of the asm 3.0 GeneratorAdapter class which dispatches calls to methods of MethodVisitor to this rather than to the encapsulated MethodVisitor instance in field mv. Doing so gives the current instance a chance to observe all visit operations. Without it the current instance only sees visit operations invoked directly by previous visitors in the chain. This is necessary in order for the RuleTriggerAdapter to build a complete CFG for the method being visited. As a consequence of the above change this class cannot inherit the methods from LocalVariableSorter which allow introduction of new local variables. That's not actually much of a loss since the functionality provided by that class is of limited utility -- it only allows local variables to be introduced via a prior pipeline stage. Instead this class provides methods to track the number of locals employed so far and supports temporary introduction and removal of locals inside injected trigger or handler code. See methods newLocal(org.objectweb.asm.Type), popLocal(int), loadLocal(int) and storeLocal(int). Another reason to transplant code to this class is because it inherits functionality from RuleMethodAdapter which is used by RuleCheckAdapter and RuleTriggerAdapter to identify and classify local variables but provides functionality to modify bytecode which is only needed by RuleTriggerAdapter. So, the original class would have needed reparenting anyway.

  • Nested Class Summary

    Nested classes/interfaces inherited from class RuleMethodAdapter

    RuleMethodAdapter.LocalVar

  • Field Summary

    Fields
    Modifier and Type
    Field
    Description
    static final int
    ADD
    Constant for the math method.
    static final int
    AND
    Constant for the math method.
    private final org.objectweb.asm.Type[]
    argumentTypes
    Argument types of the method visited by this adapter.
    private static final org.objectweb.asm.Type
    BOOLEAN_TYPE
     
    private static final org.objectweb.asm.commons.Method
    BOOLEAN_VALUE
     
    private static final org.objectweb.asm.Type
    BYTE_TYPE
     
    private static final org.objectweb.asm.commons.Method
    CHAR_VALUE
     
    private static final org.objectweb.asm.Type
    CHARACTER_TYPE
     
    private static final String
    CLDESC
     
    static final int
    DIV
    Constant for the math method.
    private static final org.objectweb.asm.Type
    DOUBLE_TYPE
     
    private static final org.objectweb.asm.commons.Method
    DOUBLE_VALUE
     
    static final int
    EQ
    Constant for the ifCmp method.
    private static final org.objectweb.asm.Type
    FLOAT_TYPE
     
    private static final org.objectweb.asm.commons.Method
    FLOAT_VALUE
     
    static final int
    GE
    Constant for the ifCmp method.
    static final int
    GT
    Constant for the ifCmp method.
    private static final org.objectweb.asm.commons.Method
    INT_VALUE
     
    private static final org.objectweb.asm.Type
    INTEGER_TYPE
     
    static final int
    LE
    Constant for the ifCmp method.
    private int
    localHighWater
    used to track maximum number of local variable slots
    private final List
    localTypes
    Types of the local variables of the method visited by this adapter.
    private static final org.objectweb.asm.Type
    LONG_TYPE
     
    private static final org.objectweb.asm.commons.Method
    LONG_VALUE
     
    static final int
    LT
    Constant for the ifCmp method.
    static final int
    MUL
    Constant for the math method.
    static final int
    NE
    Constant for the ifCmp method.
    static final int
    NEG
    Constant for the math method.
    private int
    nextLocal
    used to track active local variable slots
    private static final org.objectweb.asm.Type
    NUMBER_TYPE
     
    private static final org.objectweb.asm.Type
    OBJECT_TYPE
     
    static final int
    OR
    Constant for the math method.
    static final int
    REM
    Constant for the math method.
    private final org.objectweb.asm.Type
    returnType
    Return type of the method visited by this adapter.
    static final int
    SHL
    Constant for the math method.
    private static final org.objectweb.asm.Type
    SHORT_TYPE
     
    static final int
    SHR
    Constant for the math method.
    static final int
    SUB
    Constant for the math method.
    static final int
    USHR
    Constant for the math method.
    static final int
    XOR
    Constant for the math method.

    Fields inherited from class RuleMethodAdapter

    access, descriptor, localVarsByName, name, rule, transformContext

    Fields inherited from class org.objectweb.asm.MethodVisitor

    api, mv

  • Constructor Summary

    Constructors
    Constructor
    Description
    RuleGeneratorAdapter(org.objectweb.asm.MethodVisitor mv, TransformContext transformContext, int access, String name, String desc, Rule rule)
    Creates a new RuleGeneratorAdapter.

  • Method Summary

    Modifier and Type
    Method
    Description
    void
    arrayLength()
    Generates the instruction to compute the length of an array.
    void
    arrayLoad(org.objectweb.asm.Type type)
    Generates the instruction to load an element from an array.
    void
    arrayStore(org.objectweb.asm.Type type)
    Generates the instruction to store an element in an array.
    void
    box(org.objectweb.asm.Type type)
    Generates the instructions to box the top stack value.
    void
    cast(org.objectweb.asm.Type from, org.objectweb.asm.Type to)
    Generates the instructions to cast a numerical value from one type to another.
    void
    catchException(org.objectweb.asm.Label start, org.objectweb.asm.Label end, org.objectweb.asm.Type exception)
    Marks the start of an exception handler.
    void
    checkCast(org.objectweb.asm.Type type)
    Generates the instruction to check that the top stack value is of the given type.
    private void
    dumpFrame(int nLocal, Object[] local, int nStack, Object[] stack)
     
    private void
    dumpType(StringBuffer buffer, Object t)
     
    void
    dup()
    Generates a DUP instruction.
    void
    dup2()
    Generates a DUP2 instruction.
    void
    dup2X1()
    Generates a DUP2_X1 instruction.
    void
    dup2X2()
    Generates a DUP2_X2 instruction.
    void
    dupX1()
    Generates a DUP_X1 instruction.
    void
    dupX2()
    Generates a DUP_X2 instruction.
    void
    endMethod()
    Marks the end of the visited method.
    private void
    fieldInsn(int opcode, org.objectweb.asm.Type ownerType, String name, org.objectweb.asm.Type fieldType)
    Generates a get field or set field instruction.
    private int
    getArgIndex(int arg)
    Returns the index of the given method argument in the frame's local variables array.
    void
    getField(org.objectweb.asm.Type owner, String name, org.objectweb.asm.Type type)
    Generates the instruction to push the value of a non static field on the stack.
    private static String[]
    getInternalNames(org.objectweb.asm.Type[] types)
    Returns the internal names of the given types.
    org.objectweb.asm.Type
    getLocalType(int local)
     
    void
    getStatic(org.objectweb.asm.Type owner, String name, org.objectweb.asm.Type type)
    Generates the instruction to push the value of a static field on the stack.
    void
    goTo(org.objectweb.asm.Label label)
    Generates the instruction to jump to the given label.
    void
    ifCmp(org.objectweb.asm.Type type, int mode, org.objectweb.asm.Label label)
    Generates the instructions to jump to a label based on the comparison of the top two stack values.
    void
    ifICmp(int mode, org.objectweb.asm.Label label)
    Generates the instructions to jump to a label based on the comparison of the top two integer stack values.
    void
    ifNonNull(org.objectweb.asm.Label label)
    Generates the instruction to jump to the given label if the top stack value is not null.
    void
    ifNull(org.objectweb.asm.Label label)
    Generates the instruction to jump to the given label if the top stack value is null.
    void
    ifZCmp(int mode, org.objectweb.asm.Label label)
    Generates the instructions to jump to a label based on the comparison of the top integer stack value with zero.
    void
    iinc(int local, int amount)
    Generates the instruction to increment the given local variable.
    private void
    initLocalTypes()
    initialise the local slot types array with the types of the method target and parameters.
    void
    instanceOf(org.objectweb.asm.Type type)
    Generates the instruction to test if the top stack value is of the given type.
    void
    invokeConstructor(org.objectweb.asm.Type type, org.objectweb.asm.commons.Method method)
    Generates the instruction to invoke a constructor.
    void
    invokeDynamic(String name, String desc, org.objectweb.asm.Handle bsm, Object... bsmArgs)
    Generates an invokedynamic instruction.
    private void
    invokeInsn(int opcode, org.objectweb.asm.Type type, org.objectweb.asm.commons.Method method, boolean itf)
    Generates an invoke method instruction.
    void
    invokeInterface(org.objectweb.asm.Type owner, org.objectweb.asm.commons.Method method)
    Generates the instruction to invoke an interface method.
    void
    invokeStatic(org.objectweb.asm.Type owner, org.objectweb.asm.commons.Method method)
    Generates the instruction to invoke a static method.
    void
    invokeVirtual(org.objectweb.asm.Type owner, org.objectweb.asm.commons.Method method)
    Generates the instruction to invoke a normal method.
    void
    loadArg(int arg)
    Generates the instruction to load the given method argument on the stack.
    void
    loadArgArray()
    Generates the instructions to load all the method arguments on the stack, as a single object array.
    void
    loadArgs()
    Generates the instructions to load all the method arguments on the stack.
    void
    loadArgs(int arg, int count)
    Generates the instructions to load the given method arguments on the stack.
    private void
    loadInsn(org.objectweb.asm.Type type, int index)
    Generates the instruction to push a local variable on the stack.
    void
    loadLocal(int local)
    load a value onto the stack from a local var slot which can obtained from a call to newLocal or from a lcoal variable table entry.
    void
    loadThis()
    Generates the instruction to load 'this' on the stack.
    org.objectweb.asm.Label
    mark()
    Marks the current code position with a new label.
    void
    mark(org.objectweb.asm.Label label)
    Marks the current code position with the given label.
    void
    math(int op, org.objectweb.asm.Type type)
    Generates the instruction to do the specified mathematical or logical operation.
    void
    monitorEnter()
    Generates the instruction to get the monitor of the top stack value.
    void
    monitorExit()
    Generates the instruction to release the monitor of the top stack value.
    void
    newArray(org.objectweb.asm.Type type)
    Generates the instruction to create a new array.
    void
    newInstance(org.objectweb.asm.Type type)
    Generates the instruction to create a new object.
    org.objectweb.asm.Label
    newLabel()
    Creates a new Label.
    int
    newLocal(org.objectweb.asm.Type valueType)
    return a new local slot index for a local var not currently in use.
    void
    not()
    Generates the instructions to compute the bitwise negation of the top stack value.
    void
    pop()
    Generates a POP instruction.
    void
    pop2()
    Generates a POP2 instruction.
    void
    popLocal(int local)
    free a previously allocated local slot
    void
    push(boolean value)
    Generates the instruction to push the given value on the stack.
    void
    push(double value)
    Generates the instruction to push the given value on the stack.
    void
    push(float value)
    Generates the instruction to push the given value on the stack.
    void
    push(int value)
    Generates the instruction to push the given value on the stack.
    void
    push(long value)
    Generates the instruction to push the given value on the stack.
    void
    push(String value)
    Generates the instruction to push the given value on the stack.
    void
    push(org.objectweb.asm.Handle handle)
    Generates the instruction to push a handle on the stack.
    void
    push(org.objectweb.asm.Type value)
    Generates the instruction to push the given value on the stack.
    void
    putField(org.objectweb.asm.Type owner, String name, org.objectweb.asm.Type type)
    Generates the instruction to store the top stack value in a non static field.
    void
    putStatic(org.objectweb.asm.Type owner, String name, org.objectweb.asm.Type type)
    Generates the instruction to store the top stack value in a static field.
    void
    ret(int local)
    Generates a RET instruction.
    void
    returnValue()
    Generates the instruction to return the top stack value to the caller.
    void
    storeArg(int arg)
    Generates the instruction to store the top stack value in the given method argument.
    private void
    storeInsn(org.objectweb.asm.Type type, int index)
    Generates the instruction to store the top stack value in a local variable.
    void
    storeLocal(int local)
    save a value on the stack to a local var slot
    void
    swap()
    Generates a SWAP instruction.
    void
    swap(org.objectweb.asm.Type prev, org.objectweb.asm.Type type)
    Generates the instructions to swap the top two stack values.
    void
    tableSwitch(int[] keys, org.objectweb.asm.commons.TableSwitchGenerator generator)
    Generates the instructions for a switch statement.
    void
    tableSwitch(int[] keys, org.objectweb.asm.commons.TableSwitchGenerator generator, boolean useTable)
    Generates the instructions for a switch statement.
    void
    throwException()
    Generates the instruction to throw an exception.
    void
    throwException(org.objectweb.asm.Type type, String msg)
    Generates the instructions to create and throw an exception.
    private void
    typeInsn(int opcode, org.objectweb.asm.Type type)
    Generates a type dependent instruction.
    void
    unbox(org.objectweb.asm.Type type)
    Generates the instructions to unbox the top stack value.
    void
    visitFrame(int type, int nLocal, Object[] local, int nStack, Object[] stack)
     
    void
    visitMaxs(int maxStack, int maxLocals)
    ensure we allow enough room for any extra locals on the stack
    void
    visitVarInsn(int opcode, int var)
    override this so we can see track which local var slots are in use and avoid overwriting them

    Methods inherited from class RuleMethodAdapter

    getTargetClassName, getTriggerClassName, lookup, visitLocalVariable

    Methods inherited from class org.objectweb.asm.MethodVisitor

    getDelegate, visitAnnotableParameterCount, visitAnnotation, visitAnnotationDefault, visitAttribute, visitCode, visitEnd, visitFieldInsn, visitIincInsn, visitInsn, visitInsnAnnotation, visitIntInsn, visitInvokeDynamicInsn, visitJumpInsn, visitLabel, visitLdcInsn, visitLineNumber, visitLocalVariableAnnotation, 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

    • CLDESC

      private static final String CLDESC
      See Also:

    • BYTE_TYPE

      private static final org.objectweb.asm.Type BYTE_TYPE

    • BOOLEAN_TYPE

      private static final org.objectweb.asm.Type BOOLEAN_TYPE

    • SHORT_TYPE

      private static final org.objectweb.asm.Type SHORT_TYPE

    • CHARACTER_TYPE

      private static final org.objectweb.asm.Type CHARACTER_TYPE

    • INTEGER_TYPE

      private static final org.objectweb.asm.Type INTEGER_TYPE

    • FLOAT_TYPE

      private static final org.objectweb.asm.Type FLOAT_TYPE

    • LONG_TYPE

      private static final org.objectweb.asm.Type LONG_TYPE

    • DOUBLE_TYPE

      private static final org.objectweb.asm.Type DOUBLE_TYPE

    • NUMBER_TYPE

      private static final org.objectweb.asm.Type NUMBER_TYPE

    • OBJECT_TYPE

      private static final org.objectweb.asm.Type OBJECT_TYPE

    • BOOLEAN_VALUE

      private static final org.objectweb.asm.commons.Method BOOLEAN_VALUE

    • CHAR_VALUE

      private static final org.objectweb.asm.commons.Method CHAR_VALUE

    • INT_VALUE

      private static final org.objectweb.asm.commons.Method INT_VALUE

    • FLOAT_VALUE

      private static final org.objectweb.asm.commons.Method FLOAT_VALUE

    • LONG_VALUE

      private static final org.objectweb.asm.commons.Method LONG_VALUE

    • DOUBLE_VALUE

      private static final org.objectweb.asm.commons.Method DOUBLE_VALUE

    • ADD

      public static final int ADD
      Constant for the math method.
      See Also:

    • SUB

      public static final int SUB
      Constant for the math method.
      See Also:

    • MUL

      public static final int MUL
      Constant for the math method.
      See Also:

    • DIV

      public static final int DIV
      Constant for the math method.
      See Also:

    • REM

      public static final int REM
      Constant for the math method.
      See Also:

    • NEG

      public static final int NEG
      Constant for the math method.
      See Also:

    • SHL

      public static final int SHL
      Constant for the math method.
      See Also:

    • SHR

      public static final int SHR
      Constant for the math method.
      See Also:

    • USHR

      public static final int USHR
      Constant for the math method.
      See Also:

    • AND

      public static final int AND
      Constant for the math method.
      See Also:

    • OR

      public static final int OR
      Constant for the math method.
      See Also:

    • XOR

      public static final int XOR
      Constant for the math method.
      See Also:

    • EQ

      public static final int EQ
      Constant for the ifCmp method.
      See Also:

    • NE

      public static final int NE
      Constant for the ifCmp method.
      See Also:

    • LT

      public static final int LT
      Constant for the ifCmp method.
      See Also:

    • GE

      public static final int GE
      Constant for the ifCmp method.
      See Also:

    • GT

      public static final int GT
      Constant for the ifCmp method.
      See Also:

    • LE

      public static final int LE
      Constant for the ifCmp method.
      See Also:

    • argumentTypes

      private final org.objectweb.asm.Type[] argumentTypes
      Argument types of the method visited by this adapter.

    • returnType

      private final org.objectweb.asm.Type returnType
      Return type of the method visited by this adapter.

    • localTypes

      private final List localTypes
      Types of the local variables of the method visited by this adapter.

    • nextLocal

      private int nextLocal
      used to track active local variable slots

    • localHighWater

      private int localHighWater
      used to track maximum number of local variable slots

  • Constructor Details

    • RuleGeneratorAdapter

      public RuleGeneratorAdapter(org.objectweb.asm.MethodVisitor mv, TransformContext transformContext, int access, String name, String desc, Rule rule)
      Creates a new RuleGeneratorAdapter.
      Parameters:
      mv - the method visitor to which this adapter delegates calls.
      transformContext - the current transform context
      access - the method's access flags (see Opcodes).
      name - the method's name.
      desc - the method's descriptor (see Type).
      rule - the rule currently being injected

  • Method Details

    • initLocalTypes

      private void initLocalTypes()
      initialise the local slot types array with the types of the method target and parameters. this is needed because we are only sent an initial frame identifying the local slots which belong to the method if a stackmap table has been included in the bytecode and this is nto always the case.

    • getInternalNames

      private static String[] getInternalNames(org.objectweb.asm.Type[] types)
      Returns the internal names of the given types.
      Parameters:
      types - a set of types.
      Returns:
      the internal names of the given types.

    • push

      public void push(boolean value)
      Generates the instruction to push the given value on the stack.
      Parameters:
      value - the value to be pushed on the stack.

    • push

      public void push(int value)
      Generates the instruction to push the given value on the stack.
      Parameters:
      value - the value to be pushed on the stack.

    • push

      public void push(long value)
      Generates the instruction to push the given value on the stack.
      Parameters:
      value - the value to be pushed on the stack.

    • push

      public void push(float value)
      Generates the instruction to push the given value on the stack.
      Parameters:
      value - the value to be pushed on the stack.

    • push

      public void push(double value)
      Generates the instruction to push the given value on the stack.
      Parameters:
      value - the value to be pushed on the stack.

    • push

      public void push(String value)
      Generates the instruction to push the given value on the stack.
      Parameters:
      value - the value to be pushed on the stack. May be null.

    • push

      public void push(org.objectweb.asm.Type value)
      Generates the instruction to push the given value on the stack.
      Parameters:
      value - the value to be pushed on the stack.

    • push

      public void push(org.objectweb.asm.Handle handle)
      Generates the instruction to push a handle on the stack.
      Parameters:
      handle - the handle to be pushed on the stack.

    • getArgIndex

      private int getArgIndex(int arg)
      Returns the index of the given method argument in the frame's local variables array.
      Parameters:
      arg - the index of a method argument.
      Returns:
      the index of the given method argument in the frame's local variables array.

    • loadInsn

      private void loadInsn(org.objectweb.asm.Type type, int index)
      Generates the instruction to push a local variable on the stack.
      Parameters:
      type - the type of the local variable to be loaded.
      index - an index in the frame's local variables array.

    • storeInsn

      private void storeInsn(org.objectweb.asm.Type type, int index)
      Generates the instruction to store the top stack value in a local variable.
      Parameters:
      type - the type of the local variable to be stored.
      index - an index in the frame's local variables array.

    • loadThis

      public void loadThis()
      Generates the instruction to load 'this' on the stack.

    • loadArg

      public void loadArg(int arg)
      Generates the instruction to load the given method argument on the stack.
      Parameters:
      arg - the index of a method argument.

    • loadArgs

      public void loadArgs(int arg, int count)
      Generates the instructions to load the given method arguments on the stack.
      Parameters:
      arg - the index of the first method argument to be loaded.
      count - the number of method arguments to be loaded.

    • loadArgs

      public void loadArgs()
      Generates the instructions to load all the method arguments on the stack.

    • loadArgArray

      public void loadArgArray()
      Generates the instructions to load all the method arguments on the stack, as a single object array.

    • storeArg

      public void storeArg(int arg)
      Generates the instruction to store the top stack value in the given method argument.
      Parameters:
      arg - the index of a method argument.

    • arrayLoad

      public void arrayLoad(org.objectweb.asm.Type type)
      Generates the instruction to load an element from an array.
      Parameters:
      type - the type of the array element to be loaded.

    • arrayStore

      public void arrayStore(org.objectweb.asm.Type type)
      Generates the instruction to store an element in an array.
      Parameters:
      type - the type of the array element to be stored.

    • pop

      public void pop()
      Generates a POP instruction.

    • pop2

      public void pop2()
      Generates a POP2 instruction.

    • dup

      public void dup()
      Generates a DUP instruction.

    • dup2

      public void dup2()
      Generates a DUP2 instruction.

    • dupX1

      public void dupX1()
      Generates a DUP_X1 instruction.

    • dupX2

      public void dupX2()
      Generates a DUP_X2 instruction.

    • dup2X1

      public void dup2X1()
      Generates a DUP2_X1 instruction.

    • dup2X2

      public void dup2X2()
      Generates a DUP2_X2 instruction.

    • swap

      public void swap()
      Generates a SWAP instruction.

    • swap

      public void swap(org.objectweb.asm.Type prev, org.objectweb.asm.Type type)
      Generates the instructions to swap the top two stack values.
      Parameters:
      prev - type of the top - 1 stack value.
      type - type of the top stack value.

    • math

      public void math(int op, org.objectweb.asm.Type type)
      Generates the instruction to do the specified mathematical or logical operation.
      Parameters:
      op - a mathematical or logical operation. Must be one of ADD, SUB, MUL, DIV, REM, NEG, SHL, SHR, USHR, AND, OR, XOR.
      type - the type of the operand(s) for this operation.

    • not

      public void not()
      Generates the instructions to compute the bitwise negation of the top stack value.

    • iinc

      public void iinc(int local, int amount)
      Generates the instruction to increment the given local variable.
      Parameters:
      local - the local variable to be incremented.
      amount - the amount by which the local variable must be incremented.

    • cast

      public void cast(org.objectweb.asm.Type from, org.objectweb.asm.Type to)
      Generates the instructions to cast a numerical value from one type to another.
      Parameters:
      from - the type of the top stack value
      to - the type into which this value must be cast.

    • box

      public void box(org.objectweb.asm.Type type)
      Generates the instructions to box the top stack value. This value is replaced by its boxed equivalent on top of the stack.
      Parameters:
      type - the type of the top stack value.

    • unbox

      public void unbox(org.objectweb.asm.Type type)
      Generates the instructions to unbox the top stack value. This value is replaced by its unboxed equivalent on top of the stack.
      Parameters:
      type - the type of the top stack value.

    • newLabel

      public org.objectweb.asm.Label newLabel()
      Creates a new Label.
      Returns:
      a new Label.

    • mark

      public void mark(org.objectweb.asm.Label label)
      Marks the current code position with the given label.
      Parameters:
      label - a label.

    • mark

      public org.objectweb.asm.Label mark()
      Marks the current code position with a new label.
      Returns:
      the label that was created to mark the current code position.

    • ifCmp

      public void ifCmp(org.objectweb.asm.Type type, int mode, org.objectweb.asm.Label label)
      Generates the instructions to jump to a label based on the comparison of the top two stack values.
      Parameters:
      type - the type of the top two stack values.
      mode - how these values must be compared. One of EQ, NE, LT, GE, GT, LE.
      label - where to jump if the comparison result is true.

    • ifICmp

      public void ifICmp(int mode, org.objectweb.asm.Label label)
      Generates the instructions to jump to a label based on the comparison of the top two integer stack values.
      Parameters:
      mode - how these values must be compared. One of EQ, NE, LT, GE, GT, LE.
      label - where to jump if the comparison result is true.

    • ifZCmp

      public void ifZCmp(int mode, org.objectweb.asm.Label label)
      Generates the instructions to jump to a label based on the comparison of the top integer stack value with zero.
      Parameters:
      mode - how these values must be compared. One of EQ, NE, LT, GE, GT, LE.
      label - where to jump if the comparison result is true.

    • ifNull

      public void ifNull(org.objectweb.asm.Label label)
      Generates the instruction to jump to the given label if the top stack value is null.
      Parameters:
      label - where to jump if the condition is true.

    • ifNonNull

      public void ifNonNull(org.objectweb.asm.Label label)
      Generates the instruction to jump to the given label if the top stack value is not null.
      Parameters:
      label - where to jump if the condition is true.

    • goTo

      public void goTo(org.objectweb.asm.Label label)
      Generates the instruction to jump to the given label.
      Parameters:
      label - where to jump if the condition is true.

    • ret

      public void ret(int local)
      Generates a RET instruction.
      Parameters:
      local - a local variable identifier, as returned by newLocal().

    • tableSwitch

      public void tableSwitch(int[] keys, org.objectweb.asm.commons.TableSwitchGenerator generator)
      Generates the instructions for a switch statement.
      Parameters:
      keys - the switch case keys.
      generator - a generator to generate the code for the switch cases.

    • tableSwitch

      public void tableSwitch(int[] keys, org.objectweb.asm.commons.TableSwitchGenerator generator, boolean useTable)
      Generates the instructions for a switch statement.
      Parameters:
      keys - the switch case keys.
      generator - a generator to generate the code for the switch cases.
      useTable - true to use a TABLESWITCH instruction, or false to use a LOOKUPSWITCH instruction.

    • returnValue

      public void returnValue()
      Generates the instruction to return the top stack value to the caller.

    • fieldInsn

      private void fieldInsn(int opcode, org.objectweb.asm.Type ownerType, String name, org.objectweb.asm.Type fieldType)
      Generates a get field or set field instruction.
      Parameters:
      opcode - the instruction's opcode.
      ownerType - the class in which the field is defined.
      name - the name of the field.
      fieldType - the type of the field.

    • getStatic

      public void getStatic(org.objectweb.asm.Type owner, String name, org.objectweb.asm.Type type)
      Generates the instruction to push the value of a static field on the stack.
      Parameters:
      owner - the class in which the field is defined.
      name - the name of the field.
      type - the type of the field.

    • putStatic

      public void putStatic(org.objectweb.asm.Type owner, String name, org.objectweb.asm.Type type)
      Generates the instruction to store the top stack value in a static field.
      Parameters:
      owner - the class in which the field is defined.
      name - the name of the field.
      type - the type of the field.

    • getField

      public void getField(org.objectweb.asm.Type owner, String name, org.objectweb.asm.Type type)
      Generates the instruction to push the value of a non static field on the stack.
      Parameters:
      owner - the class in which the field is defined.
      name - the name of the field.
      type - the type of the field.

    • putField

      public void putField(org.objectweb.asm.Type owner, String name, org.objectweb.asm.Type type)
      Generates the instruction to store the top stack value in a non static field.
      Parameters:
      owner - the class in which the field is defined.
      name - the name of the field.
      type - the type of the field.

    • invokeInsn

      private void invokeInsn(int opcode, org.objectweb.asm.Type type, org.objectweb.asm.commons.Method method, boolean itf)
      Generates an invoke method instruction.
      Parameters:
      opcode - the instruction's opcode.
      type - the class in which the method is defined.
      method - the method to be invoked.

    • invokeVirtual

      public void invokeVirtual(org.objectweb.asm.Type owner, org.objectweb.asm.commons.Method method)
      Generates the instruction to invoke a normal method.
      Parameters:
      owner - the class in which the method is defined.
      method - the method to be invoked.

    • invokeConstructor

      public void invokeConstructor(org.objectweb.asm.Type type, org.objectweb.asm.commons.Method method)
      Generates the instruction to invoke a constructor.
      Parameters:
      type - the class in which the constructor is defined.
      method - the constructor to be invoked.

    • invokeStatic

      public void invokeStatic(org.objectweb.asm.Type owner, org.objectweb.asm.commons.Method method)
      Generates the instruction to invoke a static method.
      Parameters:
      owner - the class in which the method is defined.
      method - the method to be invoked.

    • invokeInterface

      public void invokeInterface(org.objectweb.asm.Type owner, org.objectweb.asm.commons.Method method)
      Generates the instruction to invoke an interface method.
      Parameters:
      owner - the class in which the method is defined.
      method - the method to be invoked.

    • invokeDynamic

      public void invokeDynamic(String name, String desc, org.objectweb.asm.Handle bsm, Object... bsmArgs)
      Generates an invokedynamic instruction.
      Parameters:
      name - the method's name.
      desc - the method's descriptor (see Type).
      bsm - the bootstrap method.
      bsmArgs - the bootstrap method constant arguments. Each argument must be an Integer, Float, Long, Double, String, Type or Handle value. This method is allowed to modify the content of the array so a caller should expect that this array may change.

    • typeInsn

      private void typeInsn(int opcode, org.objectweb.asm.Type type)
      Generates a type dependent instruction.
      Parameters:
      opcode - the instruction's opcode.
      type - the instruction's operand.

    • newInstance

      public void newInstance(org.objectweb.asm.Type type)
      Generates the instruction to create a new object.
      Parameters:
      type - the class of the object to be created.

    • newArray

      public void newArray(org.objectweb.asm.Type type)
      Generates the instruction to create a new array.
      Parameters:
      type - the type of the array elements.

    • arrayLength

      public void arrayLength()
      Generates the instruction to compute the length of an array.

    • throwException

      public void throwException()
      Generates the instruction to throw an exception.

    • throwException

      public void throwException(org.objectweb.asm.Type type, String msg)
      Generates the instructions to create and throw an exception. The exception class must have a constructor with a single String argument.
      Parameters:
      type - the class of the exception to be thrown.
      msg - the detailed message of the exception.

    • checkCast

      public void checkCast(org.objectweb.asm.Type type)
      Generates the instruction to check that the top stack value is of the given type.
      Parameters:
      type - a class or interface type.

    • instanceOf

      public void instanceOf(org.objectweb.asm.Type type)
      Generates the instruction to test if the top stack value is of the given type.
      Parameters:
      type - a class or interface type.

    • monitorEnter

      public void monitorEnter()
      Generates the instruction to get the monitor of the top stack value.

    • monitorExit

      public void monitorExit()
      Generates the instruction to release the monitor of the top stack value.

    • endMethod

      public void endMethod()
      Marks the end of the visited method.

    • catchException

      public void catchException(org.objectweb.asm.Label start, org.objectweb.asm.Label end, org.objectweb.asm.Type exception)
      Marks the start of an exception handler.
      Parameters:
      start - beginning of the exception handler's scope (inclusive).
      end - end of the exception handler's scope (exclusive).
      exception - internal name of the type of exceptions handled by the handler.

    • visitVarInsn

      public void visitVarInsn(int opcode, int var)
      override this so we can see track which local var slots are in use and avoid overwriting them
      Overrides:
      visitVarInsn in class org.objectweb.asm.MethodVisitor
      Parameters:
      opcode - the bytecode operation
      var - local variable index

    • newLocal

      public int newLocal(org.objectweb.asm.Type valueType)
      return a new local slot index for a local var not currently in use. this must be released using popLocal before a new frame can be notified which means that the slot should only be allocated inside a generated trigger section and should be released before the trigger end of the trigger section by calling popLocal.
      Parameters:
      valueType - the type of the value to be stored in the local slot
      Returns:
      the index for the new slot

    • popLocal

      public void popLocal(int local)
      free a previously allocated local slot
      Parameters:
      local - the slot to be released

    • loadLocal

      public void loadLocal(int local)
      load a value onto the stack from a local var slot which can obtained from a call to newLocal or from a lcoal variable table entry.
      Parameters:
      local - the slot to load from

    • storeLocal

      public void storeLocal(int local)
      save a value on the stack to a local var slot
      Parameters:
      local - the slot to save to

    • getLocalType

      public org.objectweb.asm.Type getLocalType(int local)

    • visitMaxs

      public void visitMaxs(int maxStack, int maxLocals)
      ensure we allow enough room for any extra locals on the stack
      Overrides:
      visitMaxs in class org.objectweb.asm.MethodVisitor
      Parameters:
      maxStack - the maximum stack depth
      maxLocals - the maximum local count

    • dumpFrame

      private void dumpFrame(int nLocal, Object[] local, int nStack, Object[] stack)

    • dumpType

      private void dumpType(StringBuffer buffer, Object t)

    • visitFrame

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