sun.jvm.hotspot.debugger

Class Page

java.lang.Object

sun.jvm.hotspot.debugger.Page

public class Page
extends java.lang.Object

A class representing an arbitrary-sized page which can be linked into a list. Used by the PageCache.

Constructor Summary

Constructors

Constructor and Description
Page(long baseAddress, byte[] data) The length of the data[] array implicitly defines the size of the page.
Page(long baseAddress, long unmappedPageLength) This constructor creates an "unmapped" page of the specified length.

Method Summary

Modifier and Type	Method and Description
long	getBaseAddress()
boolean	getBoolean(long address)
byte	getByte(long address)
char	getChar(long address, boolean bigEndian)
void	getData(long startAddress, long numBytes, int[] destBuf, long destBufOffset) Throws IndexOutOfBoundsException if the number of bytes requested is greater than the page size, or if the start address doesn't fall within the page.
void	getDataAsBytes(long startAddress, long numBytes, byte[] destBuf, long destBufOffset) Throws IndexOutOfBoundsException if the number of bytes requested is greater than the page size, or if the start address doesn't fall within the page.
double	getDouble(long address, boolean bigEndian)
float	getFloat(long address, boolean bigEndian)
int	getInt(long address, boolean bigEndian)
long	getLong(long address, boolean bigEndian)
Page	getNext()
Page	getPrev()
short	getShort(long address, boolean bigEndian)
long	getSize()
boolean	isMapped() Indicates whether this page is mapped in the remote process's address space
void	setNext(Page next)
void	setPrev(Page prev)

Methods inherited from class java.lang.Object

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

Constructor Detail

Page

public Page(long baseAddress,
            byte[] data)

The length of the data[] array implicitly defines the size of the page.

Page

public Page(long baseAddress,
            long unmappedPageLength)

This constructor creates an "unmapped" page of the specified length. Fetches from this page will cause -1 to be inserted into the destination buffer.

Method Detail

getBaseAddress

public long getBaseAddress()

getSize

public long getSize()

isMapped

public boolean isMapped()

Indicates whether this page is mapped in the remote process's address space

getPrev

public Page getPrev()

setPrev

public void setPrev(Page prev)

getNext

public Page getNext()

setNext

public void setNext(Page next)

getData

public void getData(long startAddress,
                    long numBytes,
                    int[] destBuf,
                    long destBufOffset)
             throws java.lang.IndexOutOfBoundsException

Throws IndexOutOfBoundsException if the number of bytes requested is greater than the page size, or if the start address doesn't fall within the page. There are no guarantees on whether any data was actually fetched if an IndexOutOfBoundsException is thrown. If this page is unmapped, -1 is returned for all addresses on this page.

Throws:

java.lang.IndexOutOfBoundsException

getDataAsBytes

public void getDataAsBytes(long startAddress,
                           long numBytes,
                           byte[] destBuf,
                           long destBufOffset)
                    throws java.lang.IndexOutOfBoundsException

Throws IndexOutOfBoundsException if the number of bytes requested is greater than the page size, or if the start address doesn't fall within the page. There are no guarantees on whether any data was actually fetched if an IndexOutOfBoundsException is thrown. If this page is unmapped, throws a RuntimeException; this should be watched for at higher levels.

Throws:

java.lang.IndexOutOfBoundsException

getBoolean

public boolean getBoolean(long address)

getByte

public byte getByte(long address)

getShort

public short getShort(long address,
                      boolean bigEndian)

getChar

public char getChar(long address,
                    boolean bigEndian)

getInt

public int getInt(long address,
                  boolean bigEndian)

getLong

public long getLong(long address,
                    boolean bigEndian)

getFloat

public float getFloat(long address,
                      boolean bigEndian)

getDouble

public double getDouble(long address,
                        boolean bigEndian)