dlopen-ing a library with OpenMP by a non-OpenMP process
Daniel Eischen
deischen at freebsd.org
Wed Nov 12 12:13:53 PST 2008
On Wed, 12 Nov 2008, Mikhail Teterin wrote:
> Sent by Kostik Belousov:
>> On Wed, Nov 12, 2008 at 01:09:22PM -0500, Mikhail Teterin wrote:
>>
>>> Hello!
>>>
>>> Currently, when a program built without OpenMP (-fopenmp) is trying to
>>> dlopen a library, built with the feature, the result is a crash from "bad
>>> system call":
>>>
>>> #0 0x00000008009a223c in ksem_init () from /lib/libc.so.7
>>> #1 0x0000000800998a8f in sem_init () from /lib/libc.so.7
>>> #2 0x00000008011a6537 in omp_get_nested () from /usr/lib/libgomp.so.1
>>> #3 0x00000008011a3466 in ?? () from /usr/lib/libgomp.so.1
>>> #4 0x0000000000000002 in ?? ()
>>> #5 0x00000008005072b2 in dlsym () from /libexec/ld-elf.so.1
>>> #6 0x0000000800507cd2 in dlopen () from /libexec/ld-elf.so.1
>>> ...
>>>
>> Try "kldload sem".
>>
> Uhm... That worked... I see... Shouldn't sem_init be nicer about it, though?
> Thanks,
Or perhaps you should read sem(4) ;-)
--
DE
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