org.jikesrvm.compilers.opt.inlining

Class ClassLoadingDependencyManager

java.lang.Object

org.jikesrvm.compilers.opt.inlining.ClassLoadingDependencyManager

All Implemented Interfaces:

ClassLoadingListener

public final class ClassLoadingDependencyManager
extends Object
implements ClassLoadingListener

This class acts as an intermediary between RVMClassLoader and the optimizing compiler's dependency database. Just before a class is marked as INITIALIZED, RVMClass.initialize() invokes ClassLoadingDependencyManager.classInitialized(), which is responsible for identifying and performing all necessary invalidations of opt compiler code.

Field Summary

Fields

Modifier and Type	Field and Description
private InvalidationDatabase	db Database holding information on class loading
(package private) static boolean	DEBUG Debug execution
private static PrintStream	log Stream used in debug tracing
(package private) static boolean	TRACE Trace execution

Constructor Summary

Constructors

Constructor and Description
ClassLoadingDependencyManager()

Method Summary

Modifier and Type	Method and Description
void	addNoSubclassDependency(RVMClass source, CompiledMethod cm) Record that the code currently being compiled (cm) must be invalidated if source ever has a subclass.
void	addNotOverriddenDependency(RVMMethod source, CompiledMethod cm) Record that the code currently being compiled (cm) must be invalidated if source is overridden.
void	classInitialized(RVMClass c, boolean writingBootImage)
private void	handleOverriddenMethods(RVMClass c) Takes action when a method is overridden.
private void	handleSubclassing(RVMClass c)
private void	invalidate(CompiledMethod cm)
private void	processOverride(RVMMethod overridden)
(package private) void	report(String s)

Methods inherited from class java.lang.Object

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

Field Detail

db

private final InvalidationDatabase db

Database holding information on class loading

DEBUG

static final boolean DEBUG

Debug execution

See Also:

Constant Field Values

TRACE

static final boolean TRACE

Trace execution

See Also:

Constant Field Values

log

private static PrintStream log

Stream used in debug tracing

Constructor Detail

ClassLoadingDependencyManager

public ClassLoadingDependencyManager()

Method Detail

classInitialized

public void classInitialized(RVMClass c,
                             boolean writingBootImage)

Specified by:

classInitialized in interface ClassLoadingListener

addNotOverriddenDependency

public void addNotOverriddenDependency(RVMMethod source,
                                       CompiledMethod cm)

Record that the code currently being compiled (cm) must be invalidated if source is overridden.

Parameters:

source - the method whose overriding will cause invalidation

cm - the method to invalidate

addNoSubclassDependency

public void addNoSubclassDependency(RVMClass source,
                                    CompiledMethod cm)

Record that the code currently being compiled (cm) must be invalidated if source ever has a subclass.

Parameters:

source - the class whose subclassing will cause invalidation

cm - the method to invalidate

handleOverriddenMethods

private void handleOverriddenMethods(RVMClass c)

Takes action when a method is overridden.

Parameters:

c - a class that has just been loaded.

processOverride

private void processOverride(RVMMethod overridden)

handleSubclassing

private void handleSubclassing(RVMClass c)

invalidate

private void invalidate(CompiledMethod cm)

report

void report(String s)