From mboxrd@z Thu Jan  1 00:00:00 1970
From: erik quanstrom <quanstro@quanstro.net>
Date: Mon,  2 Mar 2015 00:06:36 -0800
To: 9fans@9fans.net
Message-ID: <c861fe457b5e52ffd70a12b2e332d67e@brasstown.quanstro.net>
In-Reply-To: <411f4ed7862275a46cf5a477a3aff0c4@sigma.offblast.org>
References: <411f4ed7862275a46cf5a477a3aff0c4@sigma.offblast.org>
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Subject: Re: [9fans] pool curalloc bug
Topicbox-Message-UUID: 46ebea10-ead9-11e9-9d60-3106f5b1d025

On Wed Feb 25 18:40:39 PST 2015, mischief@9.offblast.org wrote:
> does anyone care to take a stab at figuring out why mainmem->curalloc underflows? here's a c program to reproduce.
>

i can't replicate this on amd64/9atom

; 6.curalloc
6.curalloc 786: suicide: sys: trap: fault read addr=0x0 pc=0x202761
acid; stk()
abort()+0x0 /sys/src/libc/9sys/abort.c:6
main(argv=0xfedfff80,argc=0x0)+0x54 /usr/quanstro/curalloc.c:41
_main+0x40 /sys/src/libc/amd64/main9.s:15
; 6c -a curalloc.c>curalloc.acid
; acid -l curalloc.acid 786
/proc/786/text:amd64 plan 9 executable
/sys/lib/acid/port
/sys/lib/acid/amd64
acid; (Pool)mainmem
	name	0x00400248
	maxsize	0
	cursize	1072693248
	curfree	16
	curalloc	0			<---
	minarena	0
	quantum	1076101120
	minblock	1852399981
	freeroot	0x00000000
	arenalist	0xfaf0f1fe
	alloc	0x00000000
	merge	0x00000000
	move	0xfedffef8
	flags	32
	nfree	0
	lastcompact	2106590
	lock	0x00000023
	unlock	0x002024de
	print	0x00000025
	panic	0x00201f75
	logstack	0x0000002b
	private	0x002024de

- erik