Package org.jboss.byteman.agent.adapter

Class VariableAccessTriggerAdapter.VariableAccessTriggerMethodAdapter

java.lang.Object

org.objectweb.asm.MethodVisitor

org.jboss.byteman.agent.adapter.RuleMethodAdapter

org.jboss.byteman.agent.adapter.RuleGeneratorAdapter

org.jboss.byteman.agent.adapter.RuleTriggerMethodAdapter

org.jboss.byteman.agent.adapter.VariableAccessTriggerAdapter.VariableAccessTriggerMethodAdapter

All Implemented Interfaces:

LocalScopeMethodVisitor

Direct Known Subclasses:

VariableAccessTriggerAdapter.VariableAccessTriggerConstructorAdapter

Enclosing class:

VariableAccessTriggerAdapter

private class VariableAccessTriggerAdapter.VariableAccessTriggerMethodAdapter
extends RuleTriggerMethodAdapter
implements LocalScopeMethodVisitor

a method visitor used to add a rule event trigger call to a method

Nested Class Summary

Nested classes/interfaces inherited from class org.jboss.byteman.agent.adapter.RuleMethodAdapter

RuleMethodAdapter.LocalVar

Field Summary

Fields

Modifier and Type	Field	Description
private int	index
protected boolean	latched	flag used by subclass to avoid inserting trigger until after super constructor has been called
private int	visitedCount

Fields inherited from class org.jboss.byteman.agent.adapter.RuleTriggerMethodAdapter

exceptions

Fields inherited from class org.jboss.byteman.agent.adapter.RuleGeneratorAdapter

ADD, AND, DIV, EQ, GE, GT, LE, LT, MUL, NE, NEG, OR, REM, SHL, SHR, SUB, USHR, XOR

Fields inherited from class org.jboss.byteman.agent.adapter.RuleMethodAdapter

access, descriptor, localVarsByName, name, rule, transformContext

Fields inherited from class org.objectweb.asm.MethodVisitor

api, mv

Constructor Summary

Constructors

Constructor	Description
VariableAccessTriggerMethodAdapter(org.objectweb.asm.MethodVisitor mv, TransformContext transformContext, int access, String name, String descriptor, String signature, String[] exceptions)

Method Summary

Modifier and Type	Method	Description
private boolean	matchCall(int opcode)
void	visitIincInsn(int var, int increment)
void	visitLocalScopeEnd(String name, String desc, String signature, int stackSlot, int endOffset)	checks if the local var going out of scope is the one mentioned in the rule location and if so records that the slot is no longer active.
void	visitLocalScopeStart(String name, String desc, String signature, int stackSlot, int startOffset)	checks if the local var coming into scope is the one mentioned in the rule location and if so records which slot is now being used to store the variable.
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 org.jboss.byteman.agent.adapter.RuleTriggerMethodAdapter

getInvokedTypes, getMethodName, getNewClassName, getReturnBindingType, inBytemanHandler, inBytemanTrigger, injectTriggerPoint, inRethrowHandler, visitCode, visitEnd, visitFieldInsn, visitInsn, visitIntInsn, visitInvokeDynamicInsn, visitJumpInsn, visitLabel, visitLdcInsn, visitLookupSwitchInsn, visitMaxs, visitMethodInsn, visitMultiANewArrayInsn, visitTableSwitchInsn, visitTriggerEnd, visitTriggerStart, visitTryCatchBlock, visitTypeInsn

Methods inherited from class org.jboss.byteman.agent.adapter.RuleGeneratorAdapter

arrayLength, arrayLoad, arrayStore, box, cast, catchException, checkCast, dup, dup2, dup2X1, dup2X2, dupX1, dupX2, endMethod, getField, getLocalType, getStatic, goTo, ifCmp, ifICmp, ifNonNull, ifNull, ifZCmp, iinc, instanceOf, invokeConstructor, invokeDynamic, invokeInterface, invokeStatic, invokeVirtual, loadArg, loadArgArray, loadArgs, loadArgs, loadLocal, loadThis, mark, mark, math, monitorEnter, monitorExit, newArray, newInstance, newLabel, newLocal, not, pop, pop2, popLocal, push, push, push, push, push, push, push, push, putField, putStatic, ret, returnValue, storeArg, storeLocal, swap, swap, tableSwitch, tableSwitch, throwException, throwException, unbox, visitFrame

Methods inherited from class org.jboss.byteman.agent.adapter.RuleMethodAdapter

getTriggerClassName, lookup, visitLocalVariable

Methods inherited from class org.objectweb.asm.MethodVisitor

getDelegate, visitAnnotableParameterCount, visitAnnotation, visitAnnotationDefault, visitAttribute, visitInsnAnnotation, visitLineNumber, visitLocalVariableAnnotation, visitMethodInsn, visitParameter, visitParameterAnnotation, visitTryCatchAnnotation, visitTypeAnnotation

Methods inherited from class java.lang.Object

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

Field Details

latched

protected boolean latched

flag used by subclass to avoid inserting trigger until after super constructor has been called

index

private int index

visitedCount

private int visitedCount

Constructor Details

VariableAccessTriggerMethodAdapter

VariableAccessTriggerMethodAdapter(org.objectweb.asm.MethodVisitor mv,
 TransformContext transformContext,
 int access,
 String name,
 String descriptor,
 String signature,
 String[] exceptions)

Method Details

visitLocalScopeStart

public void visitLocalScopeStart(String name,
 String desc,
 String signature,
 int stackSlot,
 int startOffset)

checks if the local var coming into scope is the one mentioned in the rule location and if so records which slot is now being used to store the variable. this is called by the BMJSRInliner which feeds this adapter because this adapter implements LocalScopeMethodVisitor

Specified by:

visitLocalScopeStart in interface LocalScopeMethodVisitor

Parameters:

name -

desc -

signature -

stackSlot -

visitLocalScopeEnd

public void visitLocalScopeEnd(String name,
 String desc,
 String signature,
 int stackSlot,
 int endOffset)

checks if the local var going out of scope is the one mentioned in the rule location and if so records that the slot is no longer active. this is called by the BMJSRInliner which feeds this adapter because this adapter implements LocalScopeMethodVisitor

Specified by:

visitLocalScopeEnd in interface LocalScopeMethodVisitor

Parameters:

name -

desc -

signature -

stackSlot -

visitVarInsn

public void visitVarInsn(int opcode,
 int var)

Description copied from class: RuleGeneratorAdapter

override this so we can see track which local var slots are in use and avoid overwriting them

Overrides:

visitVarInsn in class RuleTriggerMethodAdapter

Parameters:

opcode - the bytecode operation

var - local variable index

visitIincInsn

public void visitIincInsn(int var,
 int increment)

Overrides:

visitIincInsn in class RuleTriggerMethodAdapter

matchCall

private boolean matchCall(int opcode)