odd regression in the linux emulator.

[Jacob Frelinger]

On 01/27/11 16:49, Kostik Belousov wrote:
> On Wed, Jan 26, 2011 at 09:08:43PM +0000, Alexander Best wrote:
>> On Wed Jan 26 11, Jacob Frelinger wrote:
>>> On 01/26/11 12:55, Alexander Best wrote:
>>>> could you provide the output of 'pkg_info -E linux_dist\*' please?
>>>
>>> [jolly at moku ~]$ pkg_info -E linux_dist\*
>>> linux_dist-gentoo-stage3-20100622
>>>
>>>> btw: i also experience the problem. newer versions of linux_dist come with
>>>> linux binaries that make heavy use of futextes (even 'ls'). you should see
>>>> a lot of futex warnings in 'dmesg -a'.
>>>
>>> linux: pid 8416 (gmake): linux_sys_futex: op FUTEX_WAIT_BITSET not
>>> implemented
>>> linux: pid 8907 (ls): linux_sys_futex: op FUTEX_WAIT_BITSET not implemented
>>> linux: pid 8908 (ls): linux_sys_futex: op FUTEX_WAIT_BITSET not implemented
>>>
>>> yup.  got those.  I saw them before when everything was working though
>>> so I assumed they weren't the problem...  ls generates them but seems to
>>> work just fine.
>>
>> i think you're right. the futex stuff doesn't seem to be causing problems. i
>> performed a kdump -d/linux_ktrace sequence and this is the result:
>>
>>    8462 gmake    RET   write 67/0x43
>>    8462 gmake    CALL  linux_pipe(0xffffbe08)
>>    8462 gmake    RET   linux_pipe 0
>>    8462 gmake    CALL  close(0x5)
>>    8462 gmake    RET   close 0
>>    8462 gmake    CALL  linux_fcntl64(0x3,0x2,0x1)
>>    8462 gmake    RET   linux_fcntl64 0
>>    8462 gmake    CALL  linux_rt_sigprocmask(0,0x806bfe0,0,0x8)
>>    8462 gmake    RET   linux_rt_sigprocmask 0
>>    8462 gmake    CALL  linux_vfork
>>    8462 gmake    RET   linux_vfork 8463/0x210f
>>    8462 gmake    CALL  linux_rt_sigprocmask(0x2,0xffffbdb0,0,0x8)
>>    8462 gmake    RET   linux_rt_sigprocmask 0
>>    8462 gmake    CALL  linux_wait4(0xffffffff,0xffffbe5c,0,0)
>>    8462 gmake    RET   linux_wait4 RESTART
>>    8462 gmake    PSIG  SIGCHLD caught handler=0x80541a0 mask=0x0 code=0x0
>>    8462 gmake    CALL  linux_sigreturn(0xffffbb34)
>>    8462 gmake    RET   linux_sigreturn JUSTRETURN
>>    8462 gmake    CALL  linux_wait4(0xffffffffffffffff,0xffffffffffffbe5c,0,0)
>>    8462 gmake    RET   linux_wait4 -1 errno 14 Bad address
>>    8462 gmake    CALL  write(0x2,0xffff96b8,0xa)
>>    8462 gmake    GIO   fd 2 wrote 10 bytes
>>         "make: *** "
>>    8462 gmake    RET   write 10/0xa
>>    8462 gmake    CALL  write(0x2,0xffff96b8,0x11)
>>    8462 gmake    GIO   fd 2 wrote 17 bytes
>>         "wait: Bad address"
>>    8462 gmake    RET   write 17/0x11
>>    8462 gmake    CALL  write(0x2,0x8068727,0x9)
>>    8462 gmake    GIO   fd 2 wrote 9 bytes
>>         ".  Stop.
>>         "
>>    8462 gmake    RET   write 9
>>    8462 gmake    CALL  write(0x2,0xffff9618,0x6)
>>    8462 gmake    GIO   fd 2 wrote 6 bytes
>>         "make: "
>>    8462 gmake    RET   write 6
>>    8462 gmake    CALL  write(0x2,0xffff9618,0x23)
>>    8462 gmake    GIO   fd 2 wrote 35 bytes
>>         "*** Waiting for unfinished jobs...."
>>
>> ...so something's wrong with the linux_wait4() call.
> This should be fixed by r217991.

This fixed the problem for me as well.

Thanks!

-- 
Jacob Frelinger
jacob.frelinger at duke.edu
CBB Graduate Student