Date: Tue, 12 Oct 2010 23:43:46 +0300 From: Andriy Gapon <avg@icyb.net.ua> To: Hans Petter Selasky <hselasky@c2i.net> Cc: freebsd-acpi@freebsd.org Subject: Re: MacBookPro 5,1 Message-ID: <4CB4C882.6050006@icyb.net.ua> In-Reply-To: <201010121425.07279.hselasky@c2i.net> References: <201010121209.06397.hselasky@c2i.net> <4CB4434E.7020006@icyb.net.ua> <201010121425.07279.hselasky@c2i.net>
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on 12/10/2010 15:25 Hans Petter Selasky said the following: > On Tuesday 12 October 2010 13:15:26 Andriy Gapon wrote: >> on 12/10/2010 13:09 Hans Petter Selasky said the following: >>> Hi, >>> >>> My MacBookPro 5,1 does not boot using -current because memory inside the >>> ACPI kernel module is used after free. >>> >>> The following patch temporily mitigates the problem: >>> >>> /usr/src/sys/dev/acpica/Osd/OsdMemory.c >>> >>> void >>> AcpiOsFree(void *Memory) >>> { >>> + if (cold == 0) >>> >>> free(Memory, M_ACPICA); >>> >>> } >>> >>> Is there any way to debug this from user-land? >> >> I think that the best way is to get a backtrace at least or better a >> crashdump. > > The crashdump is not helpful. It crashes at init time, while the actual free > happens very early during boot. Still a backtrace would be useful, I think. Or track all calls to AcpiOsFree, e.g. using DTrace or stack(9) or etc. -- Andriy Gapon
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