Module openj9.dtfj

Package com.ibm.j9ddr.vm29.view.dtfj.java

Class DTFJJavaRuntimeMemorySectionBase

java.lang.Object

com.ibm.j9ddr.vm29.view.dtfj.java.DTFJJavaRuntimeMemorySectionBase

All Implemented Interfaces:

ImageSection, JavaRuntimeMemorySection

Direct Known Subclasses:

DTFJGenericJavaRuntimeMemorySection, DTFJMemoryTagRuntimeMemorySection

public abstract class DTFJJavaRuntimeMemorySectionBase
extends Object
implements JavaRuntimeMemorySection

Field Summary

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

ALLOCATION_TYPE_MALLOC_FREED, ALLOCATION_TYPE_MALLOC_LIVE, ALLOCATION_TYPE_MEMORY_MAPPED_FILE, ALLOCATION_TYPE_SHARED_MEMORY, ALLOCATION_TYPE_VIRTUAL_ALLOC

Constructor Summary

Constructors

Constructor	Description
DTFJJavaRuntimeMemorySectionBase()

Method Summary

Modifier and Type	Method	Description
ImagePointer	getBaseAddress()	Gets the base address (the lowest) of memory in this section.
protected abstract long	getBaseAddressAsLong()
Properties	getProperties()	Get the OS-specific properties for this section.
boolean	isExecutable()	Tests executable permission on memory section.
boolean	isReadOnly()	Tests read permission on memory section.
boolean	isShared()	Tests shared permission on memory section.

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.image.ImageSection

getName, getSize

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

getAllocationType, getAllocator, getMemoryCategory

Constructor Details

DTFJJavaRuntimeMemorySectionBase

public DTFJJavaRuntimeMemorySectionBase()

Method Details

getBaseAddressAsLong

protected abstract long getBaseAddressAsLong()

getBaseAddress

public ImagePointer getBaseAddress()

Description copied from interface: ImageSection

Gets the base address (the lowest) of memory in this section.

Specified by:

getBaseAddress in interface ImageSection

Returns:

Base address pointer.

isExecutable

public boolean isExecutable()
                     throws DataUnavailable

Description copied from interface: ImageSection

Tests executable permission on memory section.

Specified by:

isExecutable in interface ImageSection

Returns:

true if the memory pages in this section are marked executable. False otherwise.

Throws:

DataUnavailable

isReadOnly

public boolean isReadOnly()
                   throws DataUnavailable

Description copied from interface: ImageSection

Tests read permission on memory section.

Specified by:

isReadOnly in interface ImageSection

Returns:

true if the memory pages in this section are marked read-only. False otherwise.

Throws:

DataUnavailable

isShared

public boolean isShared()
                 throws DataUnavailable

Description copied from interface: ImageSection

Tests shared permission on memory section.

Specified by:

isShared in interface ImageSection

Returns:

true if this section is shared between processes. False otherwise.

Throws:

DataUnavailable

getProperties

public Properties getProperties()

Description copied from interface: ImageSection

Get the OS-specific properties for this section.

Specified by:

getProperties in interface ImageSection

Returns:

a table of OS-specific properties for this section. Values which are commonly available include

• "readable" -- whether the memory section can be read from
• "writable" -- whether the memory section can be written to
• "executable" -- whether data in the memory section can be executed