Hi.

I'm using Eigen to develop my own graphics engine (http://code.google.com/p/ufb/), and have a problem. One of my test segfaults (without assertion error and it segfaults with the first call of glCreateProgram() function).

If I disable Eigen alignment (defining EIGEN_DONT_ALIGN) the test works.

Now I tried almost everything, and the thing still crashes (unless I add a qDebug() << "output" to a problematic class's method) and I am wondering if somebody knows for a direction to look into.

And also, I have a class Object, which has fixed-sized vector. This class Object is then subclassed (Camera, Light, ParticleEmitter) and I'm wondering if that could be the problem?

Best regards.

have you tried in "debug mode" ? i.e., without defining NDEBUG.

Anyway, you have to take special cares at your class Object, have a look at this page:

http://eigen.tuxfamily.org/dox/Unaligne ... ssert.html

NDEBUG is not defined (if I define it, it doesn't crash ).

I've been looking at those special cases, and tried them out, but nothing worked.

I also included the QtAlignedMalloc, and it still doesn't work.

This information might help:

Valgrind says this upon crash:

Code: Select all

==10602== Process terminating with default action of signal 11 (SIGSEGV)
==10602==  Access not within mapped region at address 0xD913D298
==10602==    at 0x5124357: ??? (in /usr/lib/opengl/ati/lib/libGL.so.1.2)
==10602==    by 0x81479E3: BGE::Driver::GL3::bind(BGE::Storage::ShaderProgram*) (gl3.cpp:273)

Also note, that one function call is missing (between bind and ??? ).