MacBookPro 5,1

[Hans Petter Selasky]

On Tuesday 12 October 2010 22:43:46 Andriy Gapon wrote:
> 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.

Do you have any hints how a shall configure DTrace to trace AcpiOsFree() ?

--HPS