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Date: Mon, 03 Dec 2007 10:01:05 +0800
From: David Xu <davidxu@FreeBSD.org>
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To: Daniel Eischen <deischen@FreeBSD.org>
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Cc: nate@yogotech.com, java@FreeBSD.org, julian@FreeBSD.org
Subject: Re: cvs commit: src/lib/libkse/thread thr_kern.c
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Daniel Eischen wrote:
> On Fri, 1 Dec 2007, Arno J. Klaassen wrote:
> 
>> Daniel Eischen <deischen@freebsd.org> writes:
>>
>>> On Fri, 30 Nov 2007, Arno J. Klaassen wrote:
>>>
>>> [ ... ]
>>>
>>>> (gdb) where
>>>> #0  0x000000080075d151 in pthread_sigmask () from /usr/lib/libkse.so.3
>>>> #1  0x000000080075d103 in sigprocmask () from /usr/lib/libkse.so.3
>>>> #2  0x000000080076c423 in pthread_kill () from /usr/lib/libkse.so.3
>>>> #3  0x0000000800758f29 in fork () from /usr/lib/libkse.so.3
>>>> #4  0x0000000801e43158 in jdk_fork_wrapper ()
>>>
>>>
>>> This isn't really telling me anything because fork() doesn't call
>>> pthread_kill(), and pthread_kill() doesn't call sigprocmask().
>>
>>
>> ah, make install strips debug symbols?
>>
>> Anyway, I reran with 
>> "LD_LIBRARY_PATH=/usr/obj/files/bsd/src7/lib/libkse 
>> /usr/local/jdk1.5.0/bin/java_g "
>>
>> That gives :
>>
>> #0  0x000000080075d151 in _pthread_sigmask (how=3, set=0x813cc6e10, 
>> oset=0x0)
>>    at /files/bsd/src7/lib/libkse/thread/thr_sigmask.c:52
>> #1  0x000000080075d103 in _sigprocmask (how=3, set=0x813cc6e10, oset=0x0)
>>    at /files/bsd/src7/lib/libkse/thread/thr_sigprocmask.c:49
>> #2  0x000000080076c423 in _kse_single_thread (curthread=0x813cc6c00)
>>    at /files/bsd/src7/lib/libkse/thread/thr_kern.c:361
>> #3  0x0000000800758f29 in _fork ()
>>    at /files/bsd/src7/lib/libkse/thread/thr_fork.c:101
>> #4  0x0000000801e43158 in jdk_fork_wrapper ()
>>    at ../../../src/solaris/native/java/lang/UNIXProcess_md.c:437
>>
>> Hope this is better
> 
> 
> Yes, this would seem to be a kernel problem, as _get_curthread()
> seems to be returning garbage.  This is a libkse MD function,
> that relies on %gs (for i386/amd64) to point to something
> that was initialized in the parent.
> 
> Julian, David, got any ideas?
> 

I don't know, I am still reading some kernel code.

Regards,
David Xu