Segfault in libamdocl12cl64.so when running tests on R9 270X

[sliterok]

Linux Mint 17.3 ASUS R9 270X fglrx 2:15.200-0ubuntu0.5 AMDAPPSDK-3.0

(gdb) run

Starting program: /home/mint/new/caffe/build/test/test.testbin 
[Thread debugging using libthread_db enabled]
Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1".
Traceback (most recent call last):
File "/usr/share/gdb/auto-load/usr/lib/x86_64-linux-gnu/libstdc++.so.6.0.19-gdb.py", line 63, in <module>
from libstdcxx.v6.printers import register_libstdcxx_printers
ImportError: No module named 'libstdcxx'
[New Thread 0x7fffe1808700 (LWP 20356)]
Current device id: 0
Program received signal SIGSEGV, Segmentation fault.
0x00007fffd9e7defa in ?? () from /usr/lib/libamdocl12cl64.so

(gdb) bt full

#0 0x00007fffd9e7defa in ?? () from /usr/lib/libamdocl12cl64.so
No symbol table info available.
#1 0x00007fffd9e7e6e8 in ?? () from /usr/lib/libamdocl12cl64.so
No symbol table info available.
#2 0x00007ffff56145ea in __cxa_finalize (d=0x7fffdd006c40) at cxa_finalize.c:56
check = 1314
cxafn = <optimized out>
cxaarg = <optimized out>
f = 0xf07800
funcs = 0xf077d0
#3 0x00007fffd9e52e16 in ?? () from /usr/lib/libamdocl12cl64.so
No symbol table info available.
#4 0x000000000000008a in ?? ()
No symbol table info available.
#5 0x0000000000000000 in ?? ()
No symbol table info available.

[hughperkins]

My guess is the opencl compiler is crashing. If it was me, and I wanted to fix/diagnose it, what I would do is:

• first run all the samples from clBLAS, and check if any of them crash too
  • if they crash, then log in clBLAS repo issues, but you can still carry on as below
• otherwise find the simplest program that causes a crash
• figure out which kernel(s) are being used
• comment out everything inside the kernels, so they do nothing. ie, the kernels will look like as appendix below
• => verify no longer crashes
• uncomment stuff until you figure out which bit is causing the crash

appendix, fake example of a commented out kernel

kernel void someKernel(float *data) {  // dont comment out the declaration
  // some
  // commented
  // out 
  // stuff
  // ...
}  // dont comment out the closing bracket

[sliterok]

Fixed with installing ubuntu instead of mint

[hughperkins]

Interesting.