topic Re: Direct memory writing in Operating System - Linux

Direct memory writing

Alejandro Torrijo — Tue, 10 Jul 2007 03:44:20 GMT

Is there any application which permits writing in a process memory area?

Thanks in advance,
Alex

Re: Direct memory writing

Dennis Handly — Tue, 10 Jul 2007 06:58:05 GMT

What memory is that? Are you talking about a debugger that can use ttrace to write to a process space?

Or with shared memory, you can just attached and then just load/store that memory.

The first is slow. The second runs at hardware speeds.

Re: Direct memory writing

Alejandro Torrijo — Wed, 11 Jul 2007 03:01:51 GMT

I am asking about process space. I know that it can be done with "wdb" but I would like to know if it is possible to use another application (supported HP application preferred).

Re: Direct memory writing

A. Clay Stephenson — Wed, 11 Jul 2007 09:38:51 GMT

In a word, "no". The "supported" way for a group of processes to alter one another's memory is via shared memory segments. Consider the security and safety issues involved with what you seem to want to do. It would help if you described what you are trying to do and why; it might then be possible to offer better suggestions.

There is no /proc tree so there is no easy access to the memory image of all processes.

Re: Direct memory writing

Alejandro Torrijo — Thu, 12 Jul 2007 02:28:05 GMT

Our client is trying to debug a problematic code segment.

Re: Direct memory writing

Dennis Handly — Thu, 12 Jul 2007 02:37:41 GMT

>Our client is trying to debug a problematic code segment.

So what is wrong with using wdb/gdb?

Re: Direct memory writing

Alejandro Torrijo — Thu, 12 Jul 2007 05:55:39 GMT

There is no problem at all. We just wanted to know if is there any other application to do this, but we would tell them to continue using wdb.

Re: Direct memory writing

Dennis Handly — Thu, 12 Jul 2007 17:40:03 GMT

>We just wanted to know if is there any other application to do this

Application other than a debugger??

Basically there is only gdb. You can use wdb, ddd? or eclipse to sit on top of gdb.

Re: Direct memory writing

Alejandro Torrijo — Tue, 24 Jul 2007 05:56:30 GMT

Thank you for your answers.

Re: Direct memory writing

Dennis Handly — Tue, 24 Jul 2007 16:22:03 GMT

You haven't assigned any points to this thread. Did you get any useful answers?
Please read:
http://forums1.itrc.hp.com/service/forums/helptips.do?#33

You can reopen the thread by:
http://forums1.itrc.hp.com/service/forums/helptips.do?#41