org.jikesrvm.mm.mminterface

Class MemoryManagerConstants

java.lang.Object

org.jikesrvm.mm.mminterface.MemoryManagerConstants

public class MemoryManagerConstants
extends Object

This class merely exposes the MMTk constants into the Jikes RVM package space so that they can be accessed by the VM in an MM-neutral way. It is separate from MemoryManager to break cyclic class-loading dependencies.

Field Summary

Fields

Modifier and Type	Field and Description
static int	GC_HEADER_BITS Number of bits in the GC header required by the selected plan
static int	GC_HEADER_BYTES Number of additional bytes required in the header by the selected plan
static boolean	GENERATE_GC_TRACE true if the selected plan needs support for generating a GC trace
static boolean	MOVES_CODE true if the selected plan moves code
static boolean	MOVES_OBJECTS true if the selected plan may move objects
static boolean	MOVES_TIBS true if the selected plan moves TIB objects
static boolean	NEEDS_CONCURRENT_WORKERS true if the selected plan requires concurrent worker threads
static boolean	NEEDS_LINEAR_SCAN true if the selected plan needs support for linearly scanning the heap

Constructor Summary

Constructors

Constructor and Description
MemoryManagerConstants()

Method Summary

Methods inherited from class java.lang.Object

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

Field Detail

NEEDS_LINEAR_SCAN

public static final boolean NEEDS_LINEAR_SCAN

true if the selected plan needs support for linearly scanning the heap

GC_HEADER_BITS

public static final int GC_HEADER_BITS

Number of bits in the GC header required by the selected plan

GC_HEADER_BYTES

public static final int GC_HEADER_BYTES

Number of additional bytes required in the header by the selected plan

NEEDS_CONCURRENT_WORKERS

public static final boolean NEEDS_CONCURRENT_WORKERS

true if the selected plan requires concurrent worker threads

GENERATE_GC_TRACE

public static final boolean GENERATE_GC_TRACE

true if the selected plan needs support for generating a GC trace

MOVES_OBJECTS

public static final boolean MOVES_OBJECTS

true if the selected plan may move objects

MOVES_TIBS

public static final boolean MOVES_TIBS

true if the selected plan moves TIB objects

See Also:

Constant Field Values

MOVES_CODE

public static final boolean MOVES_CODE

true if the selected plan moves code

See Also:

Constant Field Values

Constructor Detail

MemoryManagerConstants

public MemoryManagerConstants()