FS#58996 - ocl-icd: segfault, triggered with ImageMagick.
Attached to Project:
Arch Linux
Opened by Oid Maps (dreieck) - Wednesday, 13 June 2018, 07:36 GMT
Last edited by Doug Newgard (Scimmia) - Friday, 15 June 2018, 04:54 GMT
Opened by Oid Maps (dreieck) - Wednesday, 13 June 2018, 07:36 GMT
Last edited by Doug Newgard (Scimmia) - Friday, 15 June 2018, 04:54 GMT
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Details
Having the package `extra/ocl-icd` installed makes
ImageMagick SIGABRT/ segfault.
It looks like the error is in `/usr/lib/libOpenCL.so`. Steps to reproduce: * Have `extra/imagemagick` installed. * Have `extra/ocl-icd` installed. * Get an example image, e.g. http://imagemagick.org/image/wizard.png * Convert the image with `resize`: `convert wizard.png -resize 16x16 wizard.jpg` The output of this command on `stderr` is `Aborted`, exitcode is 134. The operation has been carried out, though. Also `mogrify` is affected. This has happend with many ImageMagick versions in the last months or year. Current version: 7.0.7-39. If `ocl-icd` is not installed (but `opencl-mesa` still is), the operation succeeds. The output of `convert -version`: Version: ImageMagick 7.0.7-39 Q16 x86_64 2018-06-11 https://www.imagemagick.org Copyright: © 1999-2018 ImageMagick Studio LLC License: https://www.imagemagick.org/script/license.php Features: Cipher DPC HDRI Modules OpenCL OpenMP Delegates (built-in): bzlib cairo fontconfig freetype gslib jng jp2 jpeg lcms lqr ltdl lzma openexr pangocairo png ps raw rsvg tiff webp wmf x xml zlib The output of `clinfo`: Number of platforms 2 Platform Name Intel(R) OpenCL Platform Vendor Intel(R) Corporation Platform Version OpenCL 1.2 LINUX Platform Profile FULL_PROFILE Platform Extensions cl_khr_icd cl_khr_global_int32_base_atomics cl_khr_global_int32_extended_atomics cl_khr_local_int32_base_atomics cl_khr_local_int32_extended_atomics cl_khr_byte_addressable_store cl_khr_depth_images cl_khr_3d_image_writes cl_intel_exec_by_local_thread cl_khr_spir cl_khr_fp64 Platform Extensions function suffix INTEL Platform Name Clover Platform Vendor Mesa Platform Version OpenCL 1.1 Mesa 18.0.4 Platform Profile FULL_PROFILE Platform Extensions cl_khr_icd Platform Extensions function suffix MESA Platform Name Intel(R) OpenCL Number of devices 1 Device Name Intel(R) Core(TM)2 Solo CPU U3500 @ 1.40GHz Device Vendor Intel(R) Corporation Device Vendor ID 0x8086 Device Version OpenCL 1.2 (Build 25) Driver Version 1.2.0.25 Device OpenCL C Version OpenCL C 1.2 Device Type CPU Device Profile FULL_PROFILE Device Available Yes Compiler Available Yes Linker Available Yes Max compute units 1 Max clock frequency 1400MHz Device Partition (core) Max number of sub-devices 1 Supported partition types by counts, equally, by names (Intel) Supported affinity domains (n/a) Max work item dimensions 3 Max work item sizes 8192x8192x8192 Max work group size 8192 Preferred work group size multiple <getWGsizes:1171: create context : error -2> Preferred / native vector sizes char 1 / 16 short 1 / 8 int 1 / 4 long 1 / 2 half 0 / 0 (n/a) float 1 / 4 double 1 / 2 (cl_khr_fp64) Half-precision Floating-point support (n/a) Single-precision Floating-point support (core) Denormals Yes Infinity and NANs Yes Round to nearest Yes Round to zero No Round to infinity No IEEE754-2008 fused multiply-add No Support is emulated in software No Correctly-rounded divide and sqrt operations No Double-precision Floating-point support (cl_khr_fp64) Denormals Yes Infinity and NANs Yes Round to nearest Yes Round to zero Yes Round to infinity Yesconvert wizard.png -resize 16x16 wizard.jpg` IEEE754-2008 fused multiply-add Yes Support is emulated in software No Address bits 64, Little-Endian Global memory size 8312324096 (7.741GiB) Error Correction support No Max memory allocation 2078081024 (1.935GiB) Unified memory for Host and Device Yes Minimum alignment for any data type 128 bytes Alignment of base address 1024 bits (128 bytes) Global Memory cache type Read/Write Global Memory cache size 3145728 (3MiB) Global Memory cache line size 64 bytes Image support Yes Max number of samplers per kernel 480 Max size for 1D images from buffer 129880064 pixels Max 1D or 2D image array size 2048 images Max 2D image size 16384x16384 pixels Max 3D image size 2048x2048x2048 pixels Max number of read image args 480 Max number of write image args 480 Local memory type Global Local memory size 32768 (32KiB) Max number of constant args 480 Max constant buffer size 131072 (128KiB) Max size of kernel argument 3840 (3.75KiB) Queue properties Out-of-order execution Yes Profiling Yes Local thread execution (Intel) Yes Prefer user sync for interop No Profiling timer resolution 1ns Execution capabilities Run OpenCL kernels Yes Run native kernels Yes SPIR versions 1.2 printf() buffer size 1048576 (1024KiB) Built-in kernels (n/a) Device Extensions cl_khr_icd cl_khr_global_int32_base_atomics cl_khr_global_int32_extended_atomics cl_khr_local_int32_base_atomics cl_khr_local_int32_extended_atomics cl_khr_byte_addressable_store cl_khr_depth_images cl_khr_3d_image_writes cl_intel_exec_by_local_thread cl_khr_spir cl_khr_fp64 Platform Name Clover Number of devices 0 NULL platform behavior clGetPlatformInfo(NULL, CL_PLATFORM_NAME, ...) Intel(R) OpenCL clGetDeviceIDs(NULL, CL_DEVICE_TYPE_ALL, ...) Success [INTEL] clCreateContext(NULL, ...) [default] <checkNullCtx:2758: create context with device from default platform : error -2> clCreateContext(NULL, ...) [other] <checkNullCtx:2758: create context with device from default platform : error -2> clCreateContextFromType(NULL, CL_DEVICE_TYPE_DEFAULT) No devices available in platform clCreateContextFromType(NULL, CL_DEVICE_TYPE_CPU) No devices available in platform clCreateContextFromType(NULL, CL_DEVICE_TYPE_GPU) No devices found in platform clCreateContextFromType(NULL, CL_DEVICE_TYPE_ACCELERATOR) No devices found in platform clCreateContextFromType(NULL, CL_DEVICE_TYPE_CUSTOM) No devices found in platform clCreateContextFromType(NULL, CL_DEVICE_TYPE_ALL) No devices available in platform ICD loader properties ICD loader Name OpenCL ICD Loader ICD loader Vendor OCL Icd free software ICD loader Version 2.2.12 ICD loader Profile OpenCL 2.2 `gdb` backtrace of the failing command: `gdb convert`, at the prompt typing `run wizard.png -resize 16x16 wizard.jpg`. Output: Starting program: /usr/bin/convert wizard.png -resize 16x16 wizard.jpg [Thread debugging using libthread_db enabled] Using host libthread_db library "/usr/lib/libthread_db.so.1". Program received signal SIGSEGV, Segmentation fault. 0x0000000000000000 in ?? () At the prompt, typing `bt`. Output: #0 0x0000000000000000 in ?? () #1 0x00007ffff00e0b94 in clReleaseContext () from /usr/lib/libOpenCL.so #2 0x00007ffff7619cfe in ?? () from /usr/lib/libMagickCore-7.Q16HDRI.so.6 #3 0x00007ffff761cc97 in ?? () from /usr/lib/libMagickCore-7.Q16HDRI.so.6 #4 0x00007ffff7608d27 in MagickCoreTerminus () from /usr/lib/libMagickCore-7.Q16HDRI.so.6 #5 0x000055555555518b in ?? () #6 0x00007ffff6bf79a7 in __libc_start_main () from /usr/lib/libc.so.6 #7 0x0000555555554f1a in ?? () The file `/usr/lib/libOpenCL.so` is owned by `extra/ocl-icd`. Removing `ocl-icd` also removes `/usr/lib/libOpenCL.so`. `convert wizard.png -resize 16x16 wizard.jpg` runs fine then. Also, recompiling ImageMagick without OpenCL makes it work fine. Recompiling ImageMagick without HDRI does not have an effect on this error. This bug has been originally reported to ImageMagick: http://github.com/ImageMagick/ImageMagick/issues/1134. |
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Comment by Oid Maps (dreieck) -
Wednesday, 13 June 2018, 08:22 GMT
OK. It has to do with `intel-compute-runtime`, some Intel OpenCL
implementation. If I remove that, it works (though I have only
Mesa OpenCL then).