| Re: [eigen] segfault in adjoint unit test |
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- To: eigen@xxxxxxxxxxxxxxxxxxx
- Subject: Re: [eigen] segfault in adjoint unit test
- From: Benoit Jacob <jacob.benoit.1@xxxxxxxxx>
- Date: Sat, 29 Aug 2009 11:49:55 -0400
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I vaguely infer from your backtrace that it must be the devel branch
and SSE enabled, so i tried here with GCC 4.4.1 and -O2 -finline but i
can't reproduce, sorry.
Benoit
2009/8/29 Hauke Heibel <hauke.heibel@xxxxxxxxxxxxxx>:
> As I mentioned before, the error does not occur as soon as O2 is
> disabled since that disables inlining as well.
>
> Here is the callstack - unfortunately not very useful due to the inlining..
>
> test_adjoint.exe!Eigen::MatrixBase<Eigen::GeneralProduct<Eigen::Transpose<Eigen::Matrix<float,4,4,0,4,4>>,Eigen::Matrix<float,4,1,0,4,1>,2>
>>::dot<Eigen::Matrix<float,4,1,0,4,1> >(const
> Eigen::MatrixBase<Eigen::Matrix<float,4,1,0,4,1> > & other={...})
> Line 272 + 0xdc bytes C++
> test_adjoint.exe!adjoint<Eigen::Matrix<float,4,4,0,4,4> >(const
> Eigen::Matrix<float,4,4,0,4,4> & m={...}) Line 84 + 0x61 bytes C++
> test_adjoint.exe!test_adjoint() Line 120 + 0x1ca bytes C++
> test_adjoint.exe!main(int argc=0, char * * argv=0x0000000000000000)
> Line 329 C++
> test_adjoint.exe!__tmainCRTStartup() Line 586 + 0x19 bytes C
>
> I will try to find out more soon.
>
> - Hauke
>
> On Sat, Aug 29, 2009 at 5:22 PM, Benoit Jacob<jacob.benoit.1@xxxxxxxxx> wrote:
>> 2.0 or devel? SSE enabled or not? Just so I can try to reproduce...
>>
>> can you get a backtrace? perhaps disable assertion checking if that
>> helps getting a better backtrace, and make sure the test is compiled
>> without -O2...
>>
>> Benoit
>>
>> 2009/8/29 Hauke Heibel <hauke.heibel@xxxxxxxxxxxxxx>:
>>> Hi,
>>>
>>> I noticed a segfault in the adjoint unit test. It disappears when I change
>>>
>>> VERIFY(ei_isApprox(v1.dot(square * v2), square.adjoint() * v1.dot(v2),
>>> largerEps));
>>>
>>> to
>>>
>>> VERIFY(ei_isApprox(v1.dot(square * v2), (square.adjoint() *
>>> v1).eval().dot(v2), largerEps));
>>>
>>> and it also does not appear when inlining is disabled. I don't know
>>> how to nail down the error. I guess it's some nestByValue related
>>> issue...
>>>
>>> Regards,
>>> Hauke
>>>
>>>
>>>
>>
>>
>>
>
>
>