Module openj9.dtfj

Package com.ibm.j9ddr.corereaders.tdump.zebedee.le

Class DsaStackFrame

java.lang.Object

com.ibm.j9ddr.corereaders.tdump.zebedee.le.DsaStackFrame

public class DsaStackFrame
extends Object

This class represents a single LE stack frame (aka DSA). Use getParentFrame() to get the stack frame that called this one. XXX see ceekdmdr

Constructor Summary

Constructors

Constructor	Description
DsaStackFrame(long address, boolean isDownStack, RegisterSet registers, AddressSpace space, Caa caa)	Create a new DsaStackFrame from the given dsa address and with the given stack direction.

Method Summary

Modifier and Type	Method	Description
AddressSpace	getAddressSpace()	Returns the AddressSpace we belong to.
long	getDsaAddress()	Returns the address of the DSA for this stack frame.
String	getEntryName()	Returns the name of the function
long	getEntryOffset()	Returns the offset from the function entry point.
long	getEntryPoint()	Returns the entry point address for the function belonging to this dsa.
static String	getEntryPointName(AddressSpace space, long ep)	Returns the function name for the given entry point address.
static String	getEntryPointName(AddressSpace space, long ep, boolean scan)	Returns the function name for the given entry point address.
Function	getFunction()	Returns the function call that this stack frame represents.
DsaStackFrame	getParentFrame()	Returns the caller of this stack frame.
RegisterSet	getRegisterSet()	Returns the current register set (or null if there are no saved registers).
boolean	isDownStack()

Methods declared in class java.lang.Object

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

Constructor Details

DsaStackFrame

public DsaStackFrame(long address,
 boolean isDownStack,
 RegisterSet registers,
 AddressSpace space,
 Caa caa)
              throws IOException

Create a new DsaStackFrame from the given dsa address and with the given stack direction.

Throws:

IOException

Method Details

isDownStack

public boolean isDownStack()

getAddressSpace

public AddressSpace getAddressSpace()

Returns the AddressSpace we belong to.

getDsaAddress

public long getDsaAddress()

Returns the address of the DSA for this stack frame.

getRegisterSet

public RegisterSet getRegisterSet()

Returns the current register set (or null if there are no saved registers).

getEntryOffset

public long getEntryOffset()

Returns the offset from the function entry point. This is the offset within the function's executable code where the call was made to the successor stack frame.

getEntryPoint

public long getEntryPoint()

Returns the entry point address for the function belonging to this dsa.

getEntryName

public String getEntryName()

Returns the name of the function

getParentFrame

public DsaStackFrame getParentFrame()

Returns the caller of this stack frame.

Returns:

the stack frame for the function that called this one or null if we have reached the bottom of the stack or an error has occurred

getFunction

public Function getFunction()

Returns the function call that this stack frame represents.

getEntryPointName

public static String getEntryPointName(AddressSpace space,
 long ep)
                                throws IOException

Returns the function name for the given entry point address. XXX This was borrowed from the old svcdump code. We really should reuse some of the code elsewhere in this class that obtains the name but it's currently horribly intertwined with other DSA logic. Might be possible to fake up a DSA?

Throws:

IOException

getEntryPointName

public static String getEntryPointName(AddressSpace space,
 long ep,
 boolean scan)
                                throws IOException

Returns the function name for the given entry point address. If the scan arg is set true, keep searching backwards for a maximum of 0x1000 bytes for a valid entry point.

Throws:

IOException