Module openj9.dtfj

Package com.ibm.dtfj.java.javacore

Class JCJavaLocation

java.lang.Object

com.ibm.dtfj.java.javacore.JCJavaLocation

All Implemented Interfaces:

JavaLocation

public class JCJavaLocation
extends Object
implements JavaLocation

Constructor Summary

Constructors

Constructor	Description
JCJavaLocation(JavaMethod javaMethod)

Method Summary

Modifier and Type	Method	Description
ImagePointer	getAddress()	Fetches the absolute address of the code which this location represents.
int	getCompilationLevel()	Get the compilation level for this location.
String	getFilename()	Get the source file name.
int	getLineNumber()	Get the line number.
JavaMethod	getMethod()	Get the method which contains the point of execution.
void	setAddress(ImagePointer address)	NON-DTFJ
void	setCompilation(String compilationLevel)	NON-DTFJ
void	setFilename(String fileName)	NON-DTFJ
void	setLineNumber(int lineNumber)	NON-DTFJ
String	toString()	Answers a string containing a concise, human-readable description of the receiver.

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.java.JavaLocation

equals, hashCode

Constructor Details

JCJavaLocation

public JCJavaLocation(JavaMethod javaMethod)
               throws JCInvalidArgumentsException

Throws:

JCInvalidArgumentsException

Method Details

getAddress

public ImagePointer getAddress()
                        throws CorruptDataException

Description copied from interface: JavaLocation

Fetches the absolute address of the code which this location represents. This pointer will be contained within one of the segments returned by getBytecodeSections() or getCompiledSections() of the method returned by getMethod().

null may be returned, particularly for methods with no bytecode or compiled sections (e.g. some native methods)

Although an offset into the method may be calculated using this pointer, caution should be exercised in attempting to map this offset to an offset within the original class file. Various transformations may have been applied to the bytecodes by the VM or other agents which may make the offset difficult to interpret.

For native methods, the address may be meaningless.

Specified by:

getAddress in interface JavaLocation

Returns:

the address in memory of the managed code

Throws:

CorruptDataException

setAddress

public void setAddress(ImagePointer address)

NON-DTFJ

Parameters:

address -

getCompilationLevel

public int getCompilationLevel()
                        throws CorruptDataException

Description copied from interface: JavaLocation

Get the compilation level for this location. This is an implementation defined number indicating the level at which the current location was compiled. 0 indicates interpreted. Any positive number indicates some level of JIT compilation. Typically, higher numbers indicate more aggressive compilation strategies

For native methods, a non-zero compilation level indicates that some level of JIT compilation has been applied to the native call (e.g. a custom native call stub). To determine if the method is native, use getMethod().getModifiers().

Specified by:

getCompilationLevel in interface JavaLocation

Returns:

the compilation level

Throws:

CorruptDataException

setCompilation

public void setCompilation(String compilationLevel)

NON-DTFJ

Parameters:

compilationLevel -

getFilename

public String getFilename()
                   throws DataUnavailable,
CorruptDataException

Description copied from interface: JavaLocation

Get the source file name.

Specified by:

getFilename in interface JavaLocation

Returns:

the name of the source file, if available, or throws DataUnavailable if it is not available

Throws:

DataUnavailable - if the source file name is unavailable in the core

CorruptDataException

setFilename

public void setFilename(String fileName)

NON-DTFJ

Parameters:

fileName -

getLineNumber

public int getLineNumber()
                  throws DataUnavailable,
CorruptDataException

Description copied from interface: JavaLocation

Get the line number.

Specified by:

getLineNumber in interface JavaLocation

Returns:

the line number, if available, or throws DataUnavailable if it is not available Line numbers are counted from 1

Throws:

DataUnavailable - if the line number data is not available for this location

CorruptDataException

setLineNumber

public void setLineNumber(int lineNumber)

NON-DTFJ

Parameters:

lineNumber -

getMethod

public JavaMethod getMethod()
                     throws CorruptDataException

Description copied from interface: JavaLocation

Get the method which contains the point of execution.

Specified by:

getMethod in interface JavaLocation

Returns:

the method which contains the point of execution

Throws:

CorruptDataException

toString

public String toString()

Description copied from class: java.lang.Object

Answers a string containing a concise, human-readable description of the receiver.

Specified by:

toString in interface JavaLocation

Overrides:

toString in class Object

Returns:

A string representing the location as it would be seen in a Java stack trace