Re: GMP memory allocation and Macaulay2 (cont.)

[Bill Allombert <Bill.Allombert@math.u-bordeaux.fr>]

On Wed, Jun 21, 2017 at 04:33:12PM -0400, Doug Torrance wrote:
> Hello!
> A while ago [1], I inquired about an segfaults when Macaulay2 is linked
> against both PARI and GMP due to memory allocation issues.
> 
> Note that I tried using the new-ish INIT_noINTGMPm option to pari_init_opts
> when calling from Macaulay2 to no avail.
> 
> I promised a backtrace to help identify the problem, but am only now getting
> around to it.
> 
> Here is the output from gdb:
> (gdb) bt
> #0  __GI___libc_free (mem=0xfffffffffffffff8) at malloc.c:2966
> #1  0x00007ffff40be12f in pari_var_close ()
>    from /usr/lib/x86_64-linux-gnu/libpari-gmp-tls.so.5
> #2  0x00007ffff4102d7c in pari_close_opts ()
>    from /usr/lib/x86_64-linux-gnu/libpari-gmp-tls.so.5
> #3  0x000055555559d239 in closepari () at pari-c.c:79
> #4  0x00007ffff7de8e7a in _dl_fini () at dl-fini.c:235
> #5  0x00007ffff2f03910 in __run_exit_handlers (status=status@entry=1,
>     listp=0x7ffff32675d8 <__exit_funcs>,
>     run_list_atexit=run_list_atexit@entry=true,
> run_dtors=run_dtors@entry=true)
>     at exit.c:83
> #6  0x00007ffff2f0396a in __GI_exit (status=status@entry=1) at exit.c:105
> #7  0x00005555555f6d61 in system_exit (x=1) at system.d:78
> #8  0x000055555569e4b8 in Exit (err=<optimized out>) at interp.dd:575
> #9  0x00005555556a1197 in interp_process () at interp.dd:601
> #10 0x00005555555f59f0 in interpFunc (vargs2=<optimized out>) at M2lib.c:604
> #11 0x00005555558fa6ab in ThreadTask::run (this=0x5555561fada0,
>     thread=thread@entry=0x55555607d4d0) at supervisor.cpp:360
> #12 0x00005555558fa880 in SupervisorThread::threadEntryPoint (
>     this=0x55555607d4d0) at supervisor.cpp:422
> #13 0x00005555558fad99 in SupervisorThread::threadEntryPoint (
>     st=<optimized out>) at supervisor.hpp:96
> #14 0x00007ffff588c28e in GC_inner_start_routine ()
>    from /usr/lib/x86_64-linux-gnu/libgc.so.1
> #15 0x00007ffff58873c2 in GC_call_with_stack_base ()
>    from /usr/lib/x86_64-linux-gnu/libgc.so.1
> #16 0x00007ffff38f9494 in start_thread (arg=0x7fffed327700)
>     at pthread_create.c:333
> #17 0x00007ffff2fb6a8f in clone ()
>     at ../sysdeps/unix/sysv/linux/x86_64/clone.S:97
> 
> Is this helpful?

This does not seems related to GMP.
Are you using thread ? Do you use the thread-safe version of PARI ?

Cheers,
Bill.