edu.rice.cs.cunit.instrumentors.delay
Class CallOnSynchronizedBlockStrategy

java.lang.Object
  edu.rice.cs.cunit.instrumentors.util.AInsertAtOpcodeStrategy
      edu.rice.cs.cunit.instrumentors.delay.CallOnSynchronizedBlockStrategy

All Implemented Interfaces:

IInstrumentationStrategy

public class CallOnSynchronizedBlockStrategy
extends AInsertAtOpcodeStrategy

Instrumentation strategy that adds code before and after a monitorenter instruction.

Author:

Mathias Ricken

Field Summary

protected java.lang.String	_className Name of the class containing the method to be called.
protected java.lang.String	_methodName Name of the method to be called.
protected java.lang.String	_postVarClassName Name of the class containing the post-enabled flag.
protected java.lang.String	_postVarName Name of the post-enabled flag.
protected java.lang.String	_preVarClassName Name of the class containing the pre-enabled flag.
protected java.lang.String	_preVarName Name of the pre-enabled flag.

Fields inherited from class edu.rice.cs.cunit.instrumentors.util.AInsertAtOpcodeStrategy

_afterOpcodePredicate, _beforeOpcodePredicate, _classPredicate, _methodPredicate, OPCODE_NEVER

Constructor Summary

CallOnSynchronizedBlockStrategy(java.lang.String className, java.lang.String methodName, java.lang.String preVarClassName, java.lang.String preVarName, java.lang.String postVarClassName, java.lang.String postVarName)
Create a new strategy.

Method Summary

boolean	insertEndOfMethod(ClassFile cf, MethodInfo mi, InstructionList il, boolean insertBefore, boolean insertAfter) Insert instructions at the end of the method.
void	insertInstructionsAfter(ClassFile cf, MethodInfo mi, InstructionList il) Add instructions to call SyncPointBuffer.randomDelay after a monitorenter.
void	insertInstructionsBefore(ClassFile cf, MethodInfo mi, InstructionList il) Add instructions to call SyncPointBuffer.randomDelay before a monitorenter.
void	modifyStackAndLocals(ClassFile cf, MethodInfo mi, InstructionList il, boolean insertBefore, boolean insertAfter, boolean insertEndOfMethod) Modify the stack size and number of local variables so that the added instructions can execute.

Methods inherited from class edu.rice.cs.cunit.instrumentors.util.AInsertAtOpcodeStrategy

done, instrument

Methods inherited from class java.lang.Object

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

Field Detail

_className

protected java.lang.String _className

Name of the class containing the method to be called.

_methodName

protected java.lang.String _methodName

Name of the method to be called.

_preVarClassName

protected java.lang.String _preVarClassName

Name of the class containing the pre-enabled flag.

_preVarName

protected java.lang.String _preVarName

Name of the pre-enabled flag.

_postVarClassName

protected java.lang.String _postVarClassName

Name of the class containing the post-enabled flag.

_postVarName

protected java.lang.String _postVarName

Name of the post-enabled flag.

Constructor Detail

CallOnSynchronizedBlockStrategy

public CallOnSynchronizedBlockStrategy(java.lang.String className,
                                       java.lang.String methodName,
                                       java.lang.String preVarClassName,
                                       java.lang.String preVarName,
                                       java.lang.String postVarClassName,
                                       java.lang.String postVarName)

Create a new strategy.

Parameters:

className - name of the class containing the method to be called

methodName - name of the method to be called

preVarClassName - name of the class containing the pre-enabled flag

preVarName - name of the pre-enabled flag

postVarClassName - name of the class containing the post-enabled flag

postVarName - name of the post-enabled flag

Method Detail

insertInstructionsBefore

public void insertInstructionsBefore(ClassFile cf,
                                     MethodInfo mi,
                                     InstructionList il)

Add instructions to call SyncPointBuffer.randomDelay before a monitorenter.

Specified by:

insertInstructionsBefore in class AInsertAtOpcodeStrategy

Parameters:

cf - class file

mi - method information

il - instruction list

insertInstructionsAfter

public void insertInstructionsAfter(ClassFile cf,
                                    MethodInfo mi,
                                    InstructionList il)

Add instructions to call SyncPointBuffer.randomDelay after a monitorenter.

Specified by:

insertInstructionsAfter in class AInsertAtOpcodeStrategy

Parameters:

cf - class file

mi - method information

il - instruction list

insertEndOfMethod

public boolean insertEndOfMethod(ClassFile cf,
                                 MethodInfo mi,
                                 InstructionList il,
                                 boolean insertBefore,
                                 boolean insertAfter)

Insert instructions at the end of the method. NOTE: The method is expected to move exactly to the last instruction that was inserted. If it moves to a place before the instruction, an infinite loop may occur. If it moves to a place after the instruction, future inserts may not occur.

Specified by:

insertEndOfMethod in class AInsertAtOpcodeStrategy

Parameters:

cf - class file

mi - method information

il - instruction list

insertBefore - true if code was inserted before an opcode

insertAfter - true if code was inserted after an opcode

Returns:

true if code was inserted

modifyStackAndLocals

public void modifyStackAndLocals(ClassFile cf,
                                 MethodInfo mi,
                                 InstructionList il,
                                 boolean insertBefore,
                                 boolean insertAfter,
                                 boolean insertEndOfMethod)

Modify the stack size and number of local variables so that the added instructions can execute. Called only once per method.

Specified by:

modifyStackAndLocals in class AInsertAtOpcodeStrategy

Parameters:

cf - class file

mi - method information

il - instruction list

insertBefore - true if code was inserted before an opcode

insertAfter - true if code was inserted after an opcode

insertEndOfMethod - true if code was inserted at the end of the method