Corefile Host was (Re: frysk-core/frysk/proc IsaFactory.java TestIsa.)

[Phil Muldoon <pmuldoon@redhat.com>]

I've checked in an initial first  base of Corefile analysis code. A lot 
of this code is built on top of the considerable Frysk Java Elf bindings 
work that I and others have worked on for several months. It's good to 
finally see daylight ;)

The next task is to write an arbitary get(memory address) -> 
(translation) -> read from core file wrapper.

Corefile host/proc/tasks extend the abstract host/core/task pattern that 
Frysk is built on, and access is achieved through these interfaces. This 
allows us to "slot in" a LinuxCoreFileTask in  many places without 
modification to the code-base (like unwinding and source view) where a 
LinuxPtraceTask would have been used before.  Access to a core file via 
api is simple and is illustrated in several ways via the test classes, 
also checked in with this code. But to illustrate briefly:

Host coreHost = new LinuxCoreFileHost(Manager.eventLoop,File("your-core-file"));

{Run event loop}

Access to that corefile's procs/tasks is via the normal ways, via observers, finders or simply like:

Proc proc = coreHost.getProc(new ProcId(31497));

getting the main task something like:

Task task = proc.getMainTask();

and as usual all tasks via the getTasks() interface.

to look at a corefile task's registers you might do something like

Isa isa = task.getIsa();
long ebx = isa.getRegisterByName("ebx").get(task))

All of these interfaces are exactly the same as live ptrace procs. 

Regards

Phil





pmuldoon@sourceware.org wrote:
> CVSROOT:	/cvs/frysk
> Module name:	frysk-core
> Changes by:	pmuldoon@sourceware.org	2007-03-23 21:25:39
>
> Modified files:
> 	frysk/proc     : IsaFactory.java TestIsa.java ChangeLog 
> Added files:
> 	frysk/proc     : LinuxCoreFileHost.java 
> 	                 LinuxCoreFileHostState.java 
> 	                 LinuxCoreFileProc.java 
> 	                 LinuxCoreFileProcState.java 
> 	                 LinuxCoreFileTask.java 
> 	                 LinuxCoreFileTaskState.java TestLinuxCore.java 
>
> Log message:
> 	2007-03-23  Phil Muldoon  <pmuldoon@redjat.com>
> 	
> 	* TestLinuxCore.java: New.
> 	* LinuxCoreFileTaskState.java: New.
> 	* LinuxCoreFileTask.java:New.
> 	* LinuxCoreFileHostState.java: New.
> 	* LinuxCoreFileHost.java:New.
> 	* LinuxCoreFileProcState.java: New.
> 	* LinuxCoreFileProc.java: New.
> 	
> 	* TestIsa.java: Changed to call getIsaForCoreFile.
> 	* IsaFactory.java (getIsaByElfType): Renamed to
> 	getIsaForCoreFile. Also, modified to always return
> 	the architecture of the core file, regardless of
> 	32on64 ISA situations.
>
> Patches:
> http://sourceware.org/cgi-bin/cvsweb.cgi/frysk-core/frysk/proc/LinuxCoreFileHost.java.diff?cvsroot=frysk&r1=1.1&r2=1.2
> http://sourceware.org/cgi-bin/cvsweb.cgi/frysk-core/frysk/proc/LinuxCoreFileHostState.java.diff?cvsroot=frysk&r1=NONE&r2=1.1
> http://sourceware.org/cgi-bin/cvsweb.cgi/frysk-core/frysk/proc/LinuxCoreFileProc.java.diff?cvsroot=frysk&r1=NONE&r2=1.1
> http://sourceware.org/cgi-bin/cvsweb.cgi/frysk-core/frysk/proc/LinuxCoreFileProcState.java.diff?cvsroot=frysk&r1=NONE&r2=1.1
> http://sourceware.org/cgi-bin/cvsweb.cgi/frysk-core/frysk/proc/LinuxCoreFileTask.java.diff?cvsroot=frysk&r1=NONE&r2=1.1
> http://sourceware.org/cgi-bin/cvsweb.cgi/frysk-core/frysk/proc/LinuxCoreFileTaskState.java.diff?cvsroot=frysk&r1=NONE&r2=1.1
> http://sourceware.org/cgi-bin/cvsweb.cgi/frysk-core/frysk/proc/TestLinuxCore.java.diff?cvsroot=frysk&r1=NONE&r2=1.1
> http://sourceware.org/cgi-bin/cvsweb.cgi/frysk-core/frysk/proc/IsaFactory.java.diff?cvsroot=frysk&r1=1.15&r2=1.16
> http://sourceware.org/cgi-bin/cvsweb.cgi/frysk-core/frysk/proc/TestIsa.java.diff?cvsroot=frysk&r1=1.11&r2=1.12
> http://sourceware.org/cgi-bin/cvsweb.cgi/frysk-core/frysk/proc/ChangeLog.diff?cvsroot=frysk&r1=1.641&r2=1.642
>
>