fhpd load/start/run

[Rick Moseley <rmoseley at redhat dot com>]

Hi all,

Recently I have been working on the load/start/run command sequence and 
I thought I would bring everyone up-to-date on where I am.  I thought I 
would give everyone a quick overview of the commands and what they do as 
the functionality of the start/run commands changes based on what 
context they are executed in.

load - takes a path to an executable as a parameter and allows the user 
to examine data from an executable without running it

start - takes a path to an executable as a parameter and runs it to the 
first executable instruction; if a start command is executed with no 
parameters after a load command, it uses the path to the executable used 
in that command to do the same thing; if another start command is issued 
subsequently without parameters, the process is killed and a new version 
is loaded and rerun to the first executable instruction

Here is a load/start/start command sequence example:
  
      (fhpd) load ../pkglibdir/funit-threads-looper
       Loaded executable file: ../pkglibdir/funit-threads-looper
       (fhpd) start
       Attached to process 28451
       (fhpd) start
       Killing process 28451
       Loaded executable file: 
/home/rmoseley/frysk-git1/build/frysk-core/frysk/pkglibdir/funit-threads-looper
       Attached to process 28456
       (fhpd) where
       [0.0]
       #0 0x00000035ff600ac0 in _start () from /lib64/ld-2.7.so


run - is pretty much exactly the same as the "start" command except the 
process is run to the first breakpoint(if there is one) instead of the 
first executable instruction; if a run command is issued with no 
parameters, then it uses the path to the executable from a previous 
start or load command; as with the start command, subsequent run 
commands will kill the currently running process and reruns the process 
to the first breakpoint(again, if there is one)

Here is an example of a load/run/run sequence:

       (fhpd) load ../pkglibdir/funit-threads-looper
       Loaded executable file: ../pkglibdir/funit-threads-looper
       (fhpd) run
       Attached to process 28727
       Running process 28727
       (fhpd) run
       Killing process 28727
       Loaded executable file: 
/home/rmoseley/frysk-git1/build/frysk-core/frysk/pkglibdir/funit-threads-looper
       Attached to process 28741
       Running process 28741

Please note that changes have also been made to the HpdTestbed class to 
implement a "start" method(HpdTestbed.start).  I have made the changes 
to the existing tests that were using HpdTestbed.run to now use 
HpdTestbed.start.

Now, the next thing to get working is the passing of commandline 
arguments thru the above sequences.

As always, comments/suggestions/ideas are always welcome.    :-)

Rick