topic Segfault in kernel compilation in OpenCL* for CPU

Segfault in kernel compilation

Bruce_M_ — Sun, 06 Jan 2013 15:10:22 GMT

The attached kernel causes a segfault when clBuildProgram is called. Steps to reproduce:

On an Ubuntu 64-bit 12.04.1 system, install onlineclc (http://gitorious.org/onlineclc).
Install the 2013 beta SDK as the only (or first) OpenCL platform on the system.
Run onlineclc crash.cl. It will segfault.

The kernel is a minimal example created by deleting as much code as possible while still segfaulting, so it doesn't do anything useful.

Device info:

Name: Intel(R) Core(TM) i7-2600 CPU @ 3.40GHz
Vendor: Intel(R) Corporation
Device OpenCL C version: OpenCL C 1.2
Driver version: 1.2
Profile: FULL_PROFILE
Version: OpenCL 1.2 (Build 56860)

I just happened to have a

Jeffrey_M_Intel1 — Thu, 10 Jan 2013 05:35:52 GMT

I just happened to have a system with Ubuntu 12.04 convenient for testing. I was able to replicate the segfault via the command-line compiler too (not just with onlineclc). You've probably already seen this -- the compilation was successful using a similar kernel without the union. Unfortunately this can't be filed as a bug yet. Intel OpenCL doesn't support Ubuntu, just Fedora and SUSE. In order to process the bug it will need to be reproduced on a supported configuration. Any chance you could try this on a supported setup? Thanks, Jeff

Actually the issue is

Yuri_K_Intel — Thu, 10 Jan 2013 13:14:55 GMT

Actually the issue is reproducible on RHEL 6.1 as well, so I'm going to submit a bug for it. Thanks, Yuri

Hi Bruce,

Yuri_K_Intel — Tue, 22 Jan 2013 14:32:33 GMT

Hi Bruce, The issue has been fixed and will be available in the next release later this year. Thanks, Yuri