[OpenAFS] AFS 1.8.2 , bus error on FreeBSD

[Andreas Ladanyi]

I cant see crashes when compiling with gcc. The "bos" binary was built. 
But "bus error" occurs when executing the "bos" binary.

if i understand you correctly the error is in the LWP code. There is a 
workaround for this issue only for clang. So if i use clang to compile 
the "bos" binary could start without "bus error" ?


Am 07.04.19 um 20:44 schrieb Benjamin Kaduk:
> I don't think that's a requirement, no.
> (Were the crashes with a gcc-compiled version?)
>
> -Ben
>
> On Sun, Apr 07, 2019 at 08:17:44PM +0200, Andreas Ladanyi wrote:
>> Ok so i have to compile OpenAFS 1.8 with clang instead of gcc at FreeBSD ?
>>
>>
>> Am 06.04.19 um 04:33 schrieb Benjamin Kaduk:
>>> On Fri, Apr 05, 2019 at 08:39:23AM +0200, Andreas Ladanyi wrote:
>>>> Hi,
>>>>
>>>> i compiled afs 1.8.2 on freebsd 11.2. When i want to execute bos command
>>>> it shows me a "Bus Error".  If i understand the problem correctly the
>>>> problem is that bos wants to access memory which CPU physically cant access.
>>>>
>>>> Do i have to set some flags at configure time, before make ?
>>> The LWP code ends up with a misaligned stack for the green thread and it's
>>> kind of messy to track down a fix that works on all OS versions and with
>>> all compilers.
>>>
>>> The ports collection makefile adds -mstackrealign for clang, to work around
>>> this issue.  The hope is that for OpenAFS 2.0 we'll have LWP entirely gone
>>> and not need to worry about this any more...
>>>
>>> -Ben
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