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Old 2016-06-13, 20:58   #1
pessoft
 
Jun 2016

1 Posts
Exclamation mprime 28.9 - occassional segmentation fault during start

Hi,

I sometimes get segmentation fault during mprime start ( using mprime -d ). It happened to 28.9, but also to 28.7.

Is this mprime related issue?

This is how output looks like:

Code:
[Main thread Jun 13 01:00] Mersenne number primality test program version 28.9
[Main thread Jun 13 01:00] Optimizing for CPU architecture: Core i3/i5/i7, L2 cache size: 256 KB, L3 cache size: 4 MB
[Main thread Jun 13 01:00] Logical CPUs 1,3 form one physical CPU.
[Main thread Jun 13 01:00] Logical CPUs 2,4 form one physical CPU.
Segmentation fault (core dumped)
Here is some basic debug info:

Code:
[New LWP 2104]
[New LWP 2098]
[New LWP 2100]
[Thread debugging using libthread_db enabled]
Using host libthread_db library "/lib64/libthread_db.so.1".
Core was generated by `./mprime -d'.
Program terminated with signal SIGSEGV, Segmentation fault.
#0  __strcasecmp_l_avx () at ../sysdeps/x86_64/multiarch/strcmp-sse42.S:235
235        movdqa    (%rdi), %xmm2
[Current thread is 1 (Thread 0x7f46cdb76700 (LWP 2104))]
(gdb) bt full
#0  __strcasecmp_l_avx () at ../sysdeps/x86_64/multiarch/strcmp-sse42.S:235
No locals.
#1  0x00000000004165f7 in ?? ()
No symbol table info available.
#2  0x0000000000000000 in ?? ()
No symbol table info available.
(gdb) list
230        ja    LABEL(bigger)
231        mov    %edx, %r8d        /* r8d is offset flag for exit tail */
232        xchg    %ecx, %eax
233        xchg    %rsi, %rdi
234    LABEL(bigger):
235        movdqa    (%rdi), %xmm2
236        movdqa    (%rsi), %xmm1
237        lea    15(%rax), %r9
238        sub    %rcx, %r9
239        lea    LABEL(unaligned_table)(%rip), %r10
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