https://bugs.freedesktop.org/show_bug.cgi?id=86594
Bug ID: 86594
Summary: Segfault in glGetActiveUniformName
Product: Mesa
Version: 10.3
Hardware: x86-64 (AMD64)
OS: Linux (All)
Status: NEW
Severity: major
Priority: medium
Component: Mesa core
Assignee: mesa-dev@lists.freedesktop.org
Reporter: si...@gimp.org
I am trying to get some information about a compiled GL shader program, in
particular I need to get information about the Uniform Variables used.
The code I use is this:
glGetProgramiv (program, GL_ACTIVE_UNIFORMS, &n_uniforms);
fprintf (stderr, "%d uniforms:\n", n_uniforms);
for (i = 0; i < n_uniforms; i++)
{
glGetActiveUniformName (program, i, 79, &namelen, name);
name[namelen] = '\0';
fprintf (stderr, " %2d: %s\n", i, name);
}
I get a segfault within glGetActiveUniformName, something is wrong here. The
same code works fine with the NVidia proprietary drivers.
Some more information:
GL_VERSION : 2.1 Mesa 10.3.2
GL_VENDOR : Intel Open Source Technology Center
GL_RENDERER : Mesa DRI Intel(R) Ironlake Mobile
GLEW_VERSION : 1.10.0
GLSL VERSION : 1.20
This is using debian unstable with libgl1-mesa-glx:amd64, 10.3.2-1, amd64
Valgrind is not really helpful, even with debug symbols installed:
==27042== Process terminating with default action of signal 11 (SIGSEGV)
==27042== Bad permissions for mapped region at address 0x0
==27042== at 0x0: ???
==27042== by 0x402BFF: main (shadertoy.c:458)
==27042==
--
You are receiving this mail because:
You are the assignee for the bug.
_______________________________________________
mesa-dev mailing list
mesa-dev@lists.freedesktop.org
http://lists.freedesktop.org/mailman/listinfo/mesa-dev
