Module openj9.dtfj

Package com.ibm.dtfj.addressspace

Class LayeredAddressSpace

java.lang.Object

com.ibm.dtfj.addressspace.CommonAddressSpace

com.ibm.dtfj.addressspace.LayeredAddressSpace

All Implemented Interfaces:

IAbstractAddressSpace

public class LayeredAddressSpace
extends CommonAddressSpace

Constructor Summary

Constructors

Constructor	Description
LayeredAddressSpace(IAbstractAddressSpace base, boolean isLittleEndian, boolean is64Bit)

Method Summary

Modifier and Type	Method	Description
int	getBytesAt(int asid, long address, byte[] buffer)
boolean	isExecutable(int asid, long address)
boolean	isReadOnly(int asid, long address)
boolean	isShared(int asid, long address)
void	mapRegion(long virtualAddress, ClosingFileReader residentFile, long fileOffset, long size)

Methods declared in class com.ibm.dtfj.addressspace.CommonAddressSpace

_residentRange, bytesPerPointer, compareAddress, findPattern, findWhichMemoryRange, getByteAt, getByteOrder, getIntAt, getLongAt, getMemoryBytes, getMemoryBytes, getMemoryRanges, getPointerAt, getShortAt

Methods declared in class java.lang.Object

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

Constructor Details

LayeredAddressSpace

public LayeredAddressSpace(IAbstractAddressSpace base,
 boolean isLittleEndian,
 boolean is64Bit)

Method Details

isExecutable

public boolean isExecutable(int asid,
 long address)
                     throws MemoryAccessException

Parameters:

asid - an address space ID

address - a byte-offset into the asid

Returns:

true if this memory address is within an executable page

Throws:

MemoryAccessException - if the memory cannot be read

isReadOnly

public boolean isReadOnly(int asid,
 long address)
                   throws MemoryAccessException

Parameters:

asid - an address space ID

address - a byte-offset into the asid

Returns:

true if write access to this memory address was disabled in the image

Throws:

MemoryAccessException - if the memory cannot be read

isShared

public boolean isShared(int asid,
 long address)
                 throws MemoryAccessException

Parameters:

asid - an address space ID

address - a byte-offset into the asid

Returns:

true if this memory address is shared between processes

Throws:

MemoryAccessException - if the memory cannot be read

getBytesAt

public int getBytesAt(int asid,
 long address,
 byte[] buffer)
               throws MemoryAccessException

Parameters:

asid - an address space ID

address - a byte-offset into the asid

buffer - a byte array to receive the bytes

Returns:

the number of bytes read into buffer

Throws:

MemoryAccessException - if the memory cannot be read

mapRegion

public void mapRegion(long virtualAddress,
 ClosingFileReader residentFile,
 long fileOffset,
 long size)