Module openj9.dtfj

Package com.ibm.dtfj.java.j9

Class JavaReference

java.lang.Object

com.ibm.dtfj.java.j9.JavaReference

All Implemented Interfaces:

JavaReference

public class JavaReference
extends Object
implements JavaReference

JavaReference is intended to represent either a standard reference within a java heap, for example a reference from one object to another, or a root. A root is a reference that is held outside of the heap, in the Java stack or within the JVM itself.

Field Summary

Fields declared in interface com.ibm.dtfj.java.JavaReference

HEAP_ROOT_CLASSLOADER, HEAP_ROOT_FINALIZABLE_OBJ, HEAP_ROOT_JNI_GLOBAL, HEAP_ROOT_JNI_LOCAL, HEAP_ROOT_MONITOR, HEAP_ROOT_OTHER, HEAP_ROOT_STACK_LOCAL, HEAP_ROOT_STRINGTABLE, HEAP_ROOT_SYSTEM_CLASS, HEAP_ROOT_THREAD, HEAP_ROOT_UNFINALIZED_OBJ, HEAP_ROOT_UNKNOWN, REACHABILITY_PHANTOM, REACHABILITY_SOFT, REACHABILITY_STRONG, REACHABILITY_UNKNOWN, REACHABILITY_WEAK, REFERENCE_ARRAY_ELEMENT, REFERENCE_ASSOCIATED_CLASS, REFERENCE_CLASS, REFERENCE_CLASS_LOADER, REFERENCE_CLASS_OBJECT, REFERENCE_CONSTANT_POOL, REFERENCE_FIELD, REFERENCE_INTERFACE, REFERENCE_LOADED_CLASS, REFERENCE_PROTECTION_DOMAIN, REFERENCE_SIGNERS, REFERENCE_STATIC_FIELD, REFERENCE_SUPERCLASS, REFERENCE_UNKNOWN, REFERENCE_UNUSED_14

Constructor Summary

Constructors

Constructor	Description
JavaReference(JavaRuntime javaVM, Object source, long address, String description, int referencetype, int roottype, int reachability)	Constructor
JavaReference(JavaRuntime javaVM, Object source, Object target, String description, int referencetype, int roottype, int reachability)	Constructor

Method Summary

Methods declared in class java.lang.Object

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

Methods declared in interface com.ibm.dtfj.java.JavaReference

getDescription, getReachability, getReferenceType, getRootType, getSource, getTarget, isClassReference, isObjectReference

Constructor Detail

JavaReference

public JavaReference(JavaRuntime javaVM,
                     Object source,
                     long address,
                     String description,
                     int referencetype,
                     int roottype,
                     int reachability)

Constructor

Parameters:

javaVM - JavaRuntime

source - Object The source of this reference/root, for example the JVM or an object on the heap

address - long Address of the target object of this reference/root.

description - String

referencetype - int Mutually exclusive with respect to roottype.

roottype - int Mutually exclusive with respect to referencetype.

reachability - int the strength of the reference (this helps the GC in selection of objects for collection).

JavaReference

public JavaReference(JavaRuntime javaVM,
                     Object source,
                     Object target,
                     String description,
                     int referencetype,
                     int roottype,
                     int reachability)

Constructor

Parameters:

javaVM - JavaRuntime

source - Object The source of this reference/root, for example the JVM or an object on the heap

target - Object The target object of this reference/root.

description - String

referencetype - int Mutually exclusive with respect to roottype.

roottype - int Mutually exclusive with respect to referencetype.

reachability - int The strength of the reference (this helps the GC in selection of objects for collection).