org.jikesrvm.adaptive.measurements.instrumentation

Class Instrumentation

java.lang.Object

org.jikesrvm.adaptive.measurements.instrumentation.Instrumentation

public final class Instrumentation
extends Object

This class is used to provide general functionality useful to instrumenting methods.

Field Summary

Fields

Modifier and Type	Field and Description
static InstrumentedEventCounterManager	eventCounterManager A pointer to a InstrumentedEventCounterManager, (See InstrumentedEventCounterManager.java for the idea behind a counter manager) There can be multiple managers in use at the same time (for example, one per method)., but for now we just use one for everything.
private static boolean	instrumentationEnabled

Constructor Summary

Constructors

Constructor and Description
Instrumentation()

Method Summary

Modifier and Type	Method and Description
static void	boot(AOSOptions options) Called at boot time to set up the required data structures.
(package private) static void	disableInstrumentation() Calling this routine causes all future compilations not to insert instrumentation, regardless of what the options say.
(package private) static void	enableInstrumentation() Enable instrumentations, so that future compilations will not perform any instrumentation.
static boolean	instrumentationEnabled()

Methods inherited from class java.lang.Object

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

Field Detail

eventCounterManager

public static InstrumentedEventCounterManager eventCounterManager

A pointer to a InstrumentedEventCounterManager, (See InstrumentedEventCounterManager.java for the idea behind a counter manager) There can be multiple managers in use at the same time (for example, one per method)., but for now we just use one for everything.

instrumentationEnabled

private static boolean instrumentationEnabled

Constructor Detail

Instrumentation

public Instrumentation()

Method Detail

boot

public static void boot(AOSOptions options)

Called at boot time to set up the required data structures.

Parameters:

options - the options that govern the setup

disableInstrumentation

static void disableInstrumentation()

Calling this routine causes all future compilations not to insert instrumentation, regardless of what the options say. Used during system shutdown. Note, this method will not stop instrumentation in currently compiled methods from executing.

enableInstrumentation

static void enableInstrumentation()

Enable instrumentations, so that future compilations will not perform any instrumentation.

instrumentationEnabled

public static boolean instrumentationEnabled()

Returns:

whether it is currently O.K. to compile a method and insert instrumentation