[opengl] [Bug] Fix crash with old GLX

[archibate]

Related issue = #958 #1106

@TroyZhai do you have a taichi dev setup to help me test if the problem is gone? Many thanks!
Hope this could resolve your issue systematically :) more tests required.

[Click here for the format server]

A similar issue: http://www.mujoco.org/forum/index.php?threads/segmentation-fault-when-running-bin-simulate-on-ubuntu-16-04.3512/ or glfw/glfw#1096
Related pieces in GLFW: https://github.com/glfw/glfw/blob/e0c77f71f90e3bb8495c5c88fb0fb054d71cf7fc/src/glx_context.c#L62-L66

[zhai-xiao]

@archibate Sure thing, hold on

[Eydcao]

Incredible speed @archibate ! I will also give it a try, just a sec.

[archibate]

Bad news: it makes OpenGL not work on my machine too.

[Eydcao]

Bad news: it makes OpenGL not work on my machine too.

Still incredible speed :>, I could help test when you make another fix again

[archibate]

Thank for the patience! Given the address traceback. Could you run objdump -D /lib/libGLX_mesa.so | grep 35bf.: for me?

[Eydcao]

Thank for the patience! Given the address traceback. Could you run objdump -D /lib/libGLX_mesa.so | grep 35bf.: for me?

objdump: '/lib/libGLX_mesa.so': No such file

It says

[archibate]

Oh, sorry! It's /lib/x86_64-linux-gnu/libGLX_mesa.so.

[Eydcao]

Oh, sorry! It's /lib/x86_64-linux-gnu/libGLX_mesa.so.

This PC does not have it still, but in the same dir I found libGLX_mesa.so.0 and libGLX_mesa.so.0.0.0. Attached screenshots here

[archibate]

The information is really helpful! I added some hooks in _glfwInitGLX(), could you retrieve the latest commit of this PR and run git submodule update --init then build + import taichi to see what message it prints? (should be G0~G20, of course, no rush at all :)

[Eydcao]

The information is really helpful! I added some hooks in _glfwInitGLX(), could you retrieve the latest commit of this PR and run git submodule update --init then build + import taichi to see what message it prints? (should be G0~G20, of course, no rush at all :)

No problem, please hold on

[archibate]

What's your glx version?

[Eydcao]

What's your glx version?

1.4

[archibate]

That's strange... my glx is also 1.4..

[Eydcao]

The information is really helpful! I added some hooks in _glfwInitGLX(), could you retrieve the latest commit of this PR and run git submodule update --init then build + import taichi to see what message it prints? (should be G0~G20, of course, no rush at all :)