Class HeapDumpReader

java.lang.Object

org.openjdk.jol.heap.HeapDumpReader

public class HeapDumpReader
extends Object

Experimental heap dump reader

Field Summary

Fields

Modifier and Type	Field	Description
private final byte[]	buf
private final Multiset<ClassData>	classCounts
private final Map<Long, ClassData>	classDatas
private final Map<Long,String>	classNames
private final File	file
private String	header
private int	idSize
private final InputStream	is
private long	readBytes
private final Map<Long,String>	strings
private final ByteBuffer	wrapBuf

Constructor Summary

Constructors

Constructor	Description
HeapDumpReader(File file)

Method Summary

Modifier and Type	Method	Description
private void	digestClass()
private void	digestHeapDump()
private void	digestInstance()
private void	digestObjArray()
private void	digestPrimArray()
private String	errorMessage(String message)
private int	getSize(int type)
private String	getTypeString(int type)
Multiset<ClassData>	parse()
private int	read()
private int	read(byte[] b, int size)
(package private) byte[]	read_contents(long len)
private long	read_ID()
(package private) byte[]	read_null(long len)
(package private) int	read_U1()
(package private) int	read_U2()
(package private) long	read_U4()
(package private) long	read_U8()
(package private) String	readNullTerminated()
(package private) String	readString(long len)
private long	readValue(int type)
protected void	visitClass(long id, String name, List<Integer> oopIdx, int oopSize)
protected void	visitInstance(long id, long klassID, byte[] bytes)
protected void	visitPrimArray(long id, String componentType, int count, byte[] bytes)

Methods inherited from class Object

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

Field Details

is

private final InputStream is

strings

private final Map<Long,String> strings

classNames

private final Map<Long,String> classNames

classCounts

private final Multiset<ClassData> classCounts

classDatas

private final Map<Long, ClassData> classDatas

file

private final File file

idSize

private int idSize

readBytes

private long readBytes

buf

private final byte[] buf

wrapBuf

private final ByteBuffer wrapBuf

header

private String header

Constructor Details

HeapDumpReader

public HeapDumpReader(File file)
               throws IOException

Throws:

IOException

Method Details

read

private int read()
          throws HeapDumpException

Throws:

HeapDumpException

read

private int read(byte[] b,
 int size)
          throws HeapDumpException

Throws:

HeapDumpException

parse

public Multiset<ClassData> parse()
                          throws IOException,
HeapDumpException

Throws:

IOException

HeapDumpException

digestHeapDump

private void digestHeapDump()
                     throws HeapDumpException

Throws:

HeapDumpException

digestPrimArray

private void digestPrimArray()
                      throws HeapDumpException

Throws:

HeapDumpException

digestObjArray

private void digestObjArray()
                     throws HeapDumpException

Throws:

HeapDumpException

digestInstance

private void digestInstance()
                     throws HeapDumpException

Throws:

HeapDumpException

digestClass

private void digestClass()
                  throws HeapDumpException

Throws:

HeapDumpException

readValue

private long readValue(int type)
                throws HeapDumpException

Throws:

HeapDumpException

getSize

private int getSize(int type)
             throws HeapDumpException

Throws:

HeapDumpException

getTypeString

private String getTypeString(int type)
                      throws HeapDumpException

Throws:

HeapDumpException

read_ID

private long read_ID()
              throws HeapDumpException

Throws:

HeapDumpException

read_null

byte[] read_null(long len)
          throws HeapDumpException

Throws:

HeapDumpException

read_contents

byte[] read_contents(long len)
              throws HeapDumpException

Throws:

HeapDumpException

readNullTerminated

String readNullTerminated()
                   throws HeapDumpException

Throws:

HeapDumpException

readString

String readString(long len)
           throws HeapDumpException

Throws:

HeapDumpException

read_U8

long read_U8()
      throws HeapDumpException

Throws:

HeapDumpException

read_U4

long read_U4()
      throws HeapDumpException

Throws:

HeapDumpException

read_U2

int read_U2()
     throws HeapDumpException

Throws:

HeapDumpException

read_U1

int read_U1()
     throws HeapDumpException

Throws:

HeapDumpException

errorMessage

private String errorMessage(String message)
                     throws HeapDumpException

Throws:

HeapDumpException

visitInstance

protected void visitInstance(long id,
 long klassID,
 byte[] bytes)

visitClass

protected void visitClass(long id,
 String name,
 List<Integer> oopIdx,
 int oopSize)

visitPrimArray

protected void visitPrimArray(long id,
 String componentType,
 int count,
 byte[] bytes)