From mboxrd@z Thu Jan  1 00:00:00 1970
To: quanstro@coraid.com, 9fans@9fans.net
Date: Wed, 15 Jul 2009 17:37:51 +0200
From: gdiaz@9grid.es
Message-ID: <f2601ee4829146eff54943ad919920a5@9grid.es>
MIME-Version: 1.0
Content-Type: text/plain; charset="UTF-8"
Content-Transfer-Encoding: 8bit
Subject: Re: [9fans] naive acid debugging
Topicbox-Message-UUID: 21865de0-ead5-11e9-9d60-3106f5b1d025

hello

thank you very much  Erik, I'll look at that code today night, i hope to see the light soon ☺

gabi

> While understanding how refs work inside nupas, i decided to try to implement the same function nupas has to find mailbox references in acid langauge, so i did:
>
> defn findmboxrefs(mb,fids) {
> 	local f, refs;
> 	f=fids;
> 	while f!=0 do {
> 		print("f=", f\X,"\n");
> 		if f->mb==mb then
> 			refs++;
> 		print("f->mb=", f->mb\X,"	=?	mb=",mb\X,"\n");
> 		f=f->next;
> 	}
> 	print("refs ==", refs,"\n");
> }

first, i want to complement you on a fine use of acid.
very nice.

>
> using a Broken nupas (broked by an assert call), i got this:
>
> acid: findmboxrefs(*checkmboxrefs:mb,fids);
> f=0x0003a090
> f->mb=0x00000000	=?	mb=0x0004a468
> f=0x0004bf68
> f->mb=0x8d1c2444	=?	mb=0x0004a468
> f=0x89ffffe4
> <stdin>:75: (error) indir: can't read address 0x89ffffe4: bad arg in system call

your assmption that each fid has a mailbox is wrong.
see rattach() and sanefid().  they encode the rules.

- erik