Module openj9.dtfjview

Package com.ibm.jvm.dtfjview.heapdump.classic

Class ClassicHeapDumpFormatter

java.lang.Object

com.ibm.jvm.dtfjview.heapdump.HeapDumpFormatter

com.ibm.jvm.dtfjview.heapdump.classic.ClassicHeapDumpFormatter

public class ClassicHeapDumpFormatter
extends HeapDumpFormatter

A formatter for classic heap dumps. Format specification is in the diagnostic guide.

Field Summary

Fields declared in class com.ibm.jvm.dtfjview.heapdump.HeapDumpFormatter

_is64Bit, _version

Constructor Summary

Constructors

Constructor	Description
ClassicHeapDumpFormatter(Writer out, String version, boolean is64bit)

Method Summary

Modifier and Type	Method	Description
void	addClass(long address, String name, long superClassAddress, int size, long instanceSize, int hashCode, ReferenceIterator references)	Adds a class to the heapdump.
void	addObject(long address, long classAddress, String className, int size, int hashCode, ReferenceIterator references)	Adds an object to the heapdump.
void	addObjectArray(long address, long arrayClassAddress, String arrayClassName, long elementClassAddress, String elementClassName, long size, int numberOfElements, int hashCode, ReferenceIterator references)	Adds an object array to the heapdump.
void	addPrimitiveArray(long address, long arrayClassAddress, int type, long size, int hashCode, int numberOfElements)	Adds a primitive array object to the heapdump Type code is: 0 - bool, 1 - char, 2 - float, 3 - double, 4 - byte, 5 - short, 6 - int, 7 - long
void	close()	Closes the heapdump

Methods declared in class java.lang.Object

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

Constructor Details

ClassicHeapDumpFormatter

public ClassicHeapDumpFormatter(Writer out,
 String version,
 boolean is64bit)
                         throws IOException

Throws:

IOException

Method Details

addClass

public void addClass(long address,
 String name,
 long superClassAddress,
 int size,
 long instanceSize,
 int hashCode,
 ReferenceIterator references)
              throws IOException

Description copied from class: HeapDumpFormatter

Adds a class to the heapdump.

Specified by:

addClass in class HeapDumpFormatter

Parameters:

address - Address of class

name - Name of class

superClassAddress - Address of superclass

size - Size of class, bytes

instanceSize - Size of objects of this class

hashCode - Hashcode

references - Iterator of Long addresses (some of which may be null)

Throws:

IOException

addObject

public void addObject(long address,
 long classAddress,
 String className,
 int size,
 int hashCode,
 ReferenceIterator references)
               throws IOException

Description copied from class: HeapDumpFormatter

Adds an object to the heapdump.

Specified by:

addObject in class HeapDumpFormatter

Parameters:

address - Address of object

classAddress - Address of class of object

className - Name of class of object

size - Size of object, bytes

hashCode - Hashcode of object

references - Iterator of Long addresses (some of which may be null)

Throws:

IOException

addObjectArray

public void addObjectArray(long address,
 long arrayClassAddress,
 String arrayClassName,
 long elementClassAddress,
 String elementClassName,
 long size,
 int numberOfElements,
 int hashCode,
 ReferenceIterator references)
                    throws IOException

Description copied from class: HeapDumpFormatter

Adds an object array to the heapdump.

Specified by:

addObjectArray in class HeapDumpFormatter

Parameters:

address - Address of object

arrayClassAddress - Address of class of array object

arrayClassName - Name of class of array object

elementClassAddress - Address of class of elements

elementClassName - Name of class of elements

size - Size of object, bytes Since version 6 PHD, instance size is in the PHD and can be larger than max signed int so pass as a long

numberOfElements - number of elements in the array

hashCode - Hashcode of object

references - Iterator of Long addresses (some of which may be null)

Throws:

IOException

addPrimitiveArray

public void addPrimitiveArray(long address,
 long arrayClassAddress,
 int type,
 long size,
 int hashCode,
 int numberOfElements)
                       throws IOException,
IllegalArgumentException

Description copied from class: HeapDumpFormatter

Adds a primitive array object to the heapdump Type code is: 0 - bool, 1 - char, 2 - float, 3 - double, 4 - byte, 5 - short, 6 - int, 7 - long

Specified by:

addPrimitiveArray in class HeapDumpFormatter

Parameters:

address - Address of object

arrayClassAddress - Address of primitive array class

type - Type code - see above

size - Size of object, bytes. Since version 6 PHD, instance size is in the PHD and can be larger than max signed int so pass as a long

hashCode - Hashcode of object

numberOfElements - Number of elements in the array

Throws:

IOException

IllegalArgumentException - if invalid type is supplied

close

public void close()
           throws IOException

Description copied from class: HeapDumpFormatter

Closes the heapdump

Specified by:

close in class HeapDumpFormatter

Throws:

IOException