org.jikesrvm.compilers.opt.escape

Class MethodSummary

java.lang.Object

org.jikesrvm.compilers.opt.escape.MethodSummary

class MethodSummary
extends Object

Hold semantic information about a method that is not defined in RVMMethod.

Field Summary

Fields

Modifier and Type	Field and Description
private long	escapeInfo Escape result.
private static long	EVERYTHING_ESCAPES
private boolean	inProgress Is this method currently being analyzed?
private static int	MAXIMUM_PARAMETER_INDEX Long is 64 bits, but we need to reserve a bit for the result and we start counting at zero.
private static long	RESULT_ESCAPES

Constructor Summary

Constructors

Constructor and Description
MethodSummary(RVMMethod m)

Method Summary

Modifier and Type	Method and Description
boolean	inProgress()
boolean	parameterMayEscapeThread(int p) Query whether a parameter may escape from a thread.
boolean	resultMayEscapeThread() Query whether the result of this method may escape from a thread.
void	setInProgress(boolean b)
void	setParameterMayEscapeThread(int p, boolean b) Record that a parameter may or may not escape from a thread.
void	setResultMayEscapeThread(boolean b) Record that a result of this method may or may not escape from a thread.

Methods inherited from class java.lang.Object

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

Field Detail

MAXIMUM_PARAMETER_INDEX

private static final int MAXIMUM_PARAMETER_INDEX

Long is 64 bits, but we need to reserve a bit for the result and we start counting at zero.

See Also:

Constant Field Values

inProgress

private boolean inProgress

Is this method currently being analyzed? Used for recursive invocations of the optimizing compiler.

RESULT_ESCAPES

private static final long RESULT_ESCAPES

See Also:

Constant Field Values

EVERYTHING_ESCAPES

private static final long EVERYTHING_ESCAPES

See Also:

Constant Field Values

escapeInfo

private long escapeInfo

Escape result. Top bit is for the result of the method, i.e. the return value. The this parameter counts as a parameter.

Constructor Detail

MethodSummary

MethodSummary(RVMMethod m)

Parameters:

m - RVMMethod representing this method.

Method Detail

setParameterMayEscapeThread

public void setParameterMayEscapeThread(int p,
                                        boolean b)

Record that a parameter may or may not escape from a thread.

Parameters:

p - the number of the parameter

b - may it escape?

parameterMayEscapeThread

public boolean parameterMayEscapeThread(int p)

Query whether a parameter may escape from a thread.

Parameters:

p - the number of the parameter

Returns:

false iff the parameter cannot escape from the thread, true otherwise.

setResultMayEscapeThread

public void setResultMayEscapeThread(boolean b)

Record that a result of this method may or may not escape from a thread.

Parameters:

b - may it escape?

resultMayEscapeThread

public boolean resultMayEscapeThread()

Query whether the result of this method may escape from a thread.

Returns:

false iff the parameter cannot escape from the thread, true otherwise.

inProgress

public boolean inProgress()

Returns:

whether the analysis of this method is in progress

setInProgress

public void setInProgress(boolean b)