PARI/GP Bug report logs - #1798
pthread-related bug on Solaris

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From: "PARI/GP Bug Tracking System" <allomber@math.u-bordeaux.fr>
To: Karim Belabas <Karim.Belabas@math.u-bordeaux.fr>
Subject: Bug#1798: marked as done (pthread-related bug on Solaris)
Message-ID: <handler.1798.D1798.1538991978160523.ackdone@pari.math.u-bordeaux.fr>
References: <20181008094615.GA13418@math.u-bordeaux.fr>
 <CAJ-x-UgQoMUKJ7CBNie_vxQhTzCwp5MUvw9k4e0+1nS9MO_K1g@mail.gmail.com>
X-Pari/gp-PR-Message: closed 1798
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Date: Mon, 08 Oct 2018 10:03:02 +0000
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Your message dated Mon, 8 Oct 2018 11:46:15 +0200
with message-id <20181008094615.GA13418@math.u-bordeaux.fr>
and subject line Re: Bug#1798: pthread-related bug on Solaris
has caused the PARI/GP Bug report #1798,
regarding pthread-related bug on Solaris
to be marked as done.

This means that you claim that the problem has been dealt with.
If this is not the case it is now your responsibility to reopen the
Bug report if necessary, and/or fix the problem forthwith.

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1798: /cgi-bin/bugreport.cgi?bug=1798
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Contact allomber@math.u-bordeaux.fr with problems

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From: Igor Schein <igorschein@gmail.com>

To: submit <submit@pari.math.u-bordeaux.fr>

Subject: pthread-related bug on Solaris

Date: Fri, 18 Mar 2016 15:21:13 -0400

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Package: pari
Version: git

          GP/PARI CALCULATOR Version 2.8.0 (development 18700-3cadb51)
          ix86 running solaris (ix86/GMP-4.3.2 kernel) 32-bit version
                 compiled: Mar 18 2016, gcc version 4.8.2 (GCC)
                           threading engine: pthread
                (readline v5.2 disabled, extended help enabled)

                     Copyright (C) 2000-2016 The PARI Group

PARI/GP is free software, covered by the GNU General Public License, and
comes
WITHOUT ANY WARRANTY WHATSOEVER.

Type ? for help, \q to quit.
Type ?15 for how to get moral (and possibly technical) support.

parisize = 4000000, primelimit = 500000
   echo = 1 (on)
? bnfisprincipal(bnfinit(x^2-x-57),[5,1;0,1])
  ***   at top-level: bnfisprincipal(bnfin
  ***                 ^--------------------
  *** bnfisprincipal: bug in PARI/GP (Segmentation Fault), please report.

Debug version works fine with pthread.

Thanks

Igor

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From: Karim Belabas <Karim.Belabas@math.u-bordeaux.fr>

To: Igor Schein <igorschein@gmail.com>

Cc: Bill Allombert <Bill.Allombert@math.u-bordeaux.fr>, 1798-close@pari.math.u-bordeaux.fr

Subject: Re: Bug#1798: pthread-related bug on Solaris

Date: Mon, 8 Oct 2018 11:46:15 +0200

* Igor Schein [2016-03-30 20:56]:
> On Fri, Mar 18, 2016 at 3:50 PM, Bill Allombert <
> Bill.Allombert@math.u-bordeaux.fr> wrote:
> 
> > On Fri, Mar 18, 2016 at 03:21:13PM -0400, Igor Schein wrote:
> > > Package: pari
> > > Version: git
> > >
> > >           GP/PARI CALCULATOR Version 2.8.0 (development 18700-3cadb51)
> > >           ix86 running solaris (ix86/GMP-4.3.2 kernel) 32-bit version
> > >                  compiled: Mar 18 2016, gcc version 4.8.2 (GCC)
> > >                            threading engine: pthread
> > >                 (readline v5.2 disabled, extended help enabled)
> > >
> > >                      Copyright (C) 2000-2016 The PARI Group
> > >
> > > PARI/GP is free software, covered by the GNU General Public License, and
> > > comes
> > > WITHOUT ANY WARRANTY WHATSOEVER.
> > >
> > > Type ? for help, \q to quit.
> > > Type ?15 for how to get moral (and possibly technical) support.
> > >
> > > parisize = 4000000, primelimit = 500000
> > >    echo = 1 (on)
> > > ? bnfisprincipal(bnfinit(x^2-x-57),[5,1;0,1])
> > >   ***   at top-level: bnfisprincipal(bnfin
> > >   ***                 ^--------------------
> > >   *** bnfisprincipal: bug in PARI/GP (Segmentation Fault), please report.
> > >
> > > Debug version works fine with pthread.
> >
> > I do not know how good is the TLS support in this configuration.
> > Your example does not actually run any threads, so it is purely
> > a TLS issue.
> >
> > Could you try
> > polmodular(127)
> >
> > Cheers,
> > Bill
> >
> 
> I was able to work around the said SEGV by configuring with
> CFLAGS=-fno-tree-loop-vectorize
> 
> When I do use -ftree-loop-vectorize, I get the following stack trace (for
> what it's worth):
> 
> #0  getrand () at ../src/basemath/random.c:134
> #1  0x079eb2c0 in bnfisprincipal0 (bnf=0xfe5d0e00, x=<optimized out>,
> flag=1) at ../src/basemath/buch2.c:1902
> #2  0x07d62ae5 in closure_eval (C=C@entry=0xfe5d0fb4) at
> ../src/language/eval.c:1305
> #3  0x07d6425c in closure_return (C=<optimized out>) at
> ../src/language/eval.c:614
> #4  closure_evalres (C=0xfe5d0fb4) at ../src/language/eval.c:1585
> #5  0x08071ca6 in gp_main_loop (ismain=ismain@entry=1) at ../src/gp/gp.c:371
> #6  0x08072912 in main (argc=<optimized out>, argv=<optimized out>) at
> ../src/gp/gp.c:598
> 
> I get the identical behavior with both
> gcc version 4.8.2 (GCC)
> and
> gcc version 6.0.0 20160327 (experimental) (GCC)

Closing this issue.

Thanks for your report !

    K.B.
--
Karim Belabas, IMB (UMR 5251)  Tel: (+33) (0)5 40 00 26 17
Universite de Bordeaux         Fax: (+33) (0)5 40 00 21 23
351, cours de la Liberation    http://www.math.u-bordeaux.fr/~kbelabas/
F-33405 Talence (France)       http://pari.math.u-bordeaux.fr/  [PARI/GP]
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