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Cannot get dbx to work correctly with a running process

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Old 02-25-2011
Cannot get dbx to work correctly with a running process
Hi everyone,

I've been struggling with this for a few weeks now. I'm trying to debug a running process with dbx on an AIX box.

The command I'm using is 'dbx -a <pid> core'
There is a function I can perform in my application that crashes this process, but it does not show up as crashed in dbx. However, if I do 'ps -ef | grep <process>' it shows a new PID, so I know something is happening. The output I get when I first start dbx is,

Quote:
Waiting to attach to process 573546 ...
Successfully attached to dps643.
Type 'help' for help.
reading symbolic information ...
stopped in msgrcv at 0x900000000247918 ($t1)
0x900000000247918 (msgrcv+0xd8) e8410028 ld r2,0x28(r1)
(dbx)
If anyone can give me a hand, I'd appreciate it.

---------- Post updated at 12:29 PM ---------- Previous update was at 12:09 PM ----------

Another thing I just noticed is, the PID doesn't change until I actually type 'quit' in dbx. The service appears to crash (application locks up - then displays connection lost message), but the PID doesn't change until I exit my dbx session. Don't know if that matters.
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jsadebugd

jsadebugd(1)						      General Commands Manual						      jsadebugd(1)

NAME

       jsadebugd - serviceability agent debug daemon

SYNOPSIS

       jsadebugd [pid] [server-id]
       jsadebugd executable core [server-id]

DESCRIPTION

       jsadebugd  attaches to a Java process or core file and acts as a debug server. Remote clients such as jstack, jmap, and jinfo can attach to
       the server using Java Remote Method Invocation (RMI). Before starting jsadebugd, rmiregistry must be started with:

	      rmiregistry -J-Xbootclasspath/p:$JAVA_HOME/lib/sajdi.jar

       where $JAVA_HOME is the J2SE SDK installation directory.  If rmiregistry was not started, jsadebugd will start an rmiregistry in a standard
       (1099) port internally. Debug server may be stopped by sending SIGINT (pressing Ctrl-C) to it.

       NOTE - This utility is unsupported and may or may not be available in future versions of the J2SE SDK.  jinfo is not currently available on
       Windows platforms or on the Linux Itanium platform.

PARAMETERS

       pid	      process id of the process to which the debug server should attach. The process must be a Java process. To get a list of Java
		      processes  running  on  a  machine,  jps	may be used.  At most one instance of the debug server may be attached to a single
		      process.

       executable     Java executable from which the core dump was produced.

       core	      core file to which the debug server should attach.

       server-id      optional unique id, needed if multiple debug servers are started on the same machine. This ID must be used by remote clients
		      to identify the particular debug server to attach. Within a single machine, this ID must be unique.

SEE ALSO

       jinfo(1) jmap(1) jps(1) jstack(1) rmiregistry(1)

								   13 June 2004 						      jsadebugd(1)