topic clBuildProgram segmentation fault when -g build option specified in OpenCL* for CPU

clBuildProgram segmentation fault when -g build option specified

Noah_R_ — Tue, 20 Aug 2013 21:20:15 GMT

This demonstrates a segmentation fault experienced upon calling clBuildProgram() when this particular OpenCL program is compiled with the "-g" build option.

My setup: Ubuntu 13.04, Intel OpenCL intel/opencl-1.2-3.0.67279
Execution is on CPU device: Intel(R) Core(TM) i7-3615QM CPU @ 2.30GHz

Build Command:
[bash]g++ -o ./debug_symbols_seg_fault -g debug_symbols_seg_fault.cpp bugDemoSupport.cpp -I $OCL_INC_DIR -L $OCL_LIB_DIR -lOpenCL [/bash]

Run Command:
[bash]./debug_symbols_seg_fault [/bash]
Or, if you need to supply a different OpenCL platform index or device index, see [bash]./debug_symbols_seg_fault -h [/bash]

I see a segmentation fault upon call to clBuildProgram().

If you edit debug_symbols_seg_fault.cpp line 51 to remove the "-g" debug symbols flag from the buildOptions string, recompile, then re-run, the segmantion fault does not occur.

I tried a much smaller kernel but it did not reproduce this bug. The attached full OpenCL program does work correctly in the context of a larger program on AMD and Apple OpenCL implementations.

Any suggestions? I'd like to resolve this so that I can use the Intel debugging toolset.

Sidenote: Wow. Your forum does not accept files with .cl extension?

Thanks for the reproducer. We

Raghupathi_M_Intel — Wed, 21 Aug 2013 15:47:00 GMT

Thanks for the reproducer. We'll take a look and get back to you.

Raghu

Were you able to reproduce

Noah_R_ — Wed, 11 Sep 2013 04:09:51 GMT

Were you able to reproduce this bug?

Hi,

Yuri_K_Intel — Wed, 11 Sep 2013 07:58:22 GMT

Hi, Yes, the bug is reproducible on our side. I will notify you about availability of the fix. Thanks, Yuri

Has there been any progress

Noah_R_ — Wed, 04 Dec 2013 16:41:38 GMT

Has there been any progress on fixing this bug? The effect for me is I can't develop on the Intel OpenCL platform, because I can't troubleshoot my complex kernels using gdb.

Hi,

Yuri_K_Intel — Thu, 05 Dec 2013 07:25:18 GMT

Hi, We have the fix in our development branch. Unfortunately, I can't say anything regarding when this fix will be available in a public release. I will update here once this is done. Thanks, Yuri