[Crash-utility] calling crash from another program (or vice versa)

[James Washer]

Thanks all.. I take a look at the various options recommended.
On Mon, 2009-12-14 at 08:40 -0500, Chouinard, Luc wrote:
> Jim -
> 
> Indraneel Mukherjee (mukherjee.indraneel at gmail.com) posted these to the
> lkcd mailing list some time ago. You might want to look at some of those
> - there's one about mounts and one about SBs. 
> 
> Sial does not provide reentrancy back to crash. On the plus side, you
> can pretty much cut&paste kernel code straight into you script, so you
> don't have to be a kernel guru to get the info you want. A good source
> of code is the /proc hooks that are employed throughout kernel and
> driver code... :)
> 
> 
>         -Luc
>  
> 
> > -----Original Message-----
> > From: crash-utility-bounces at redhat.com 
> > [mailto:crash-utility-bounces at redhat.com] On Behalf Of James Washer
> > Sent: Friday, December 11, 2009 6:29 PM
> > To: Discussion "list for crash utility usage,maintenance and 
> > development
> > Subject: [Crash-utility] calling crash from another program 
> > (or vice versa)
> > 
> > Often, I'd like to be able to run one crash command, massage 
> > the data produced, and run follow up commands using the massaged data
> > 
> > A (possibly crazy) example, run the mount command, collect 
> > the superblocks addresses, for each super_block, get the 
> > s_inodes list head, traverse each list head to the inode, for 
> > each inode, find it's i_data
> > (address_space) and get the number of pages.. Now.. sum these 
> > up and print a table of filesystem mounts points and the 
> > number of cached pages for each... Perhaps, I'd even traverse 
> > the struct pages to provide a count of clean and dirty pages 
> > for each file system.
> > 
> > I do do this by hand. (i.e. mount > mount.file; perlscript 
> > mount.file > crash-script-step-1, then, back in crash I do ". 
> > crash-script-step-1 > data-file-2; and repeat with more 
> > massaging).. This is gross, prone to error, and not terribly fast.
> > 
> > I'd love to start crash as a child of perl and either use 
> > expect (which is a bit of a hack) or better yet, have some 
> > machine interface to crash (ala gdbmi)...
> > 
> > I know.. it's open source, I should write it myself. I just 
> > don't want to reinvent the wheel, if someone else already has 
> > done something like this.
> > 
> > Perhaps I need to learn sial. But what little sial I've 
> > looked at seems a bit low level for my needs.
> > 
> > Has anyone had much luck using expect with crash?
> > 
> > thanks
> > 
> >  - jim
> > 
> > 
> > --
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> > Crash-utility at redhat.com
> > https://www.redhat.com/mailman/listinfo/crash-utility
> > 
> > 
> 
> 
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> email message attachment
> > -------- Forwarded Message --------
> > From: Luc Chouinard <lucchouina at yahoo.com>
> > To: Chouinard, Luc <Luc.Chouinard at trueposition.com>
> > Subject: Fw: [lkcd-devel] Some additional SIAL scripts for lkcdutils
> > Date: Thu, 24 Sep 2009 07:35:20 -0500
> > 
> > 
> > ----- Forwarded Message ----
> > From: Indraneel Mukherjee <mukherjee.indraneel at gmail.com>
> > To: lkcd-devel at lists.sourceforge.net
> > Sent: Thursday, September 24, 2009 7:32:12 AM
> > Subject: [lkcd-devel] Some additional SIAL scripts for lkcdutils
> > 
> > Hi,
> > We wrote some additional SIAL scripts for lkcdutils.
> > 
> > Details:
> > ---------
> > 
> > 1. files.sial - Similar to the 'sfiles' command listing info on open files for processes in the dump.
> > 2. inodeinfo.sial - Prints detailed info for the given inode number of a given superblock in the dump.
> > 3. lsmount.sial - List the mounted file systems in the dump.
> > 4. meminfo.sial - Similar to /proc/meminfo.
> > 5. mutexinfo - Shows the owner and waiting processes for a given mutex address.
> > 6. psched.sial - Similar to /proc/$PID/sched
> > 7. superblkinfo.sial - Lists all  the fs superblocks and the associated inodes.
> > 
> > They've been tested on lcrash dumps for linux-2.6.22 through 26 for ARM architecture.
> > 
> > Can these be added to the lkcdutils svn repo?
> > 
> > Warm Regards,
> > Indro
> > 
> > plain text document attachment (ATT1316106.txt), "ATT1316106.txt"
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