[Date Prev][Date Next] [Thread Prev][Thread Next] [Date Index] [Thread Index]

[Pkg-octave-devel] Bug#528078: marked as done (octave3.0: Segfault when doing a big calcul.)

Your message dated Sun, 17 May 2009 10:39:16 +0200
with message-id <20090517083916.GB22693@pc049-u864.lyon.inserm.fr>
and subject line Closing Bug#523085 and Bug#528078
has caused the Debian Bug report #528078,
regarding octave3.0: Segfault when doing a big calcul.
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.

(NB: If you are a system administrator and have no idea what this
message is talking about, this may indicate a serious mail system
misconfiguration somewhere. Please contact owner@bugs.debian.org

528078: http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=528078
Debian Bug Tracking System
Contact owner@bugs.debian.org with problems
--- Begin Message ---
Package: octave3.0
Version: 1:3.0.1-6lenny3
Severity: important

Ok, I'm trying to do a big computation with a exponential time 
differencing method, using lot of fft, ifft and vector
element-by-element multiplication. The matter is that , when
I'm trying to run my script, octave3.0 crash with a segfault.

I have run it in gdb :


(gdb) run equa_diff_SSM_ETD1.m 
Starting program: /usr/bin/octave equa_diff_SSM_ETD1.m
(no debugging symbols found)
(no debugging symbols found)
[Thread debugging using libthread_db enabled]
[New Thread 0xb5b4cab0 (LWP 19081)]
GNU Octave, version 3.0.1
Copyright (C) 2008 John W. Eaton and others.
This is free software; see the source code for copying conditions.
FITNESS FOR A PARTICULAR PURPOSE.  For details, type `warranty'.

Octave was configured for "i486-pc-linux-gnu".

Additional information about Octave is available at http://www.octave.org.

Please contribute if you find this software useful.
For more information, visit http://www.octave.org/help-wanted.html

Report bugs to <bug@octave.org> (but first, please read
http://www.octave.org/bugs.html to learn how to write a helpful report).

For information about changes from previous versions, type `news'.

Program received signal SIGSEGV, Segmentation fault.
[Switching to Thread 0xb5b4cab0 (LWP 19081)]
0xb794fc42 in symbol_record::clear (this=0xaad5fd8) at ov.h:392
392	ov.h: No such file or directory.
	in ov.h


Step to reproduce : run this script with octave interpreter.

%%%%%%%%%%%%%%%%%%%%%START OF SCRIPT%%%%%%%%%%%%%%%%%%%%%%%%%%
clear all ;

delta_z = 1e-7 ; %
fenetre_t = 7 ;

N_z = 1000 ; 
N_t = 1024 ;%256 ;
N_nu = N_t ;

delta_t = fenetre_t ./ ( N_t - 1) ;

delta_nu = 1 ./ ( ( N_nu - 1 ) .* delta_t ) ;

vecteur_t = [ -fenetre_t/2: delta_t : fenetre_t/2 ] ;
vecteur_z = [ 0 : delta_z : ( N_z - 1 ) * delta_z ] ;
vecteur_nu = [ 0 :delta_nu : (N_nu/2)*delta_nu ,  -(N_nu/2-1)*delta_nu : delta_nu : -delta_nu ] ;

p = 5 ;
gamma = 0 ;

eta  = vecteur_t * p + (p.^3) * vecteur_z(1) - gamma ; 
u = zeros ( N_z , N_t ) ;
u(1,:) = ( sqrt(6)*p ) ./ cosh(eta) ;
c = ( 2 .* pi .* i .* vecteur_nu ).^3 ; 

g1=exp( c .* delta_z ) ;

g2(1) = delta_z ;

for k = [ 1:N_z-1 ] 
    u_chapeau_0 = fft( u( k , : )  ) ; %  
    vecteur_derive = real(ifft( i .* 2 .*  pi .* vecteur_nu .* u_chapeau_0 ));
    terme_non_lineaire = fft( ( u( k , : ).^2 ) .* vecteur_derive  )  ; 
    u_chapeau_1 = g1 .* u_chapeau_0 +  terme_non_lineaire .*g2 ;
    u(k+1,:) = real(ifft(u_chapeau_1)) ;
end ;

imagesc(vecteur_t,vecteur_z,real(u)) ;
%%%%%%%%%%%%%%END OF SCRIPT%%%%%%%%%%%%%%%%%%%%%

-- System Information:
Debian Release: 5.0.1
  APT prefers stable
  APT policy: (500, 'stable')
Architecture: i386 (i686)

Kernel: Linux 2.6.26-2-686 (SMP w/2 CPU cores)
Locale: LANG=fr_FR.UTF-8, LC_CTYPE=fr_FR.UTF-8 (charmap=UTF-8)
Shell: /bin/sh linked to /bin/bash

Versions of packages octave3.0 depends on:
ii  libatlas3gf-base [libl 3.6.0-22          Automatically Tuned Linear Algebra
ii  libblas3gf [libblas.so 1.2-2             Basic Linear Algebra Subroutines 3
ii  libc6                  2.7-18            GNU C Library: Shared libraries
ii  libcurl3-gnutls        7.18.2-8lenny2    Multi-protocol file transfer libra
ii  libfftw3-3             3.1.2-3.1         library for computing Fast Fourier
ii  libgcc1                1:4.3.2-1.1       GCC support library
ii  libgfortran3           4.3.2-1.1         Runtime library for GNU Fortran ap
ii  libglpk0               4.29-2            linear programming kit with intege
ii  libhdf5-serial-1.6.6-0 1.6.6-4           Hierarchical Data Format 5 (HDF5) 
ii  liblapack3gf [liblapac 3.1.1-1           library of linear algebra routines
ii  libncurses5            5.7+20081213-1    shared libraries for terminal hand
ii  libpcre3               7.6-2.1           Perl 5 Compatible Regular Expressi
ii  libqhull5              2003.1-9lenny1    calculate convex hulls and related
ii  libreadline5           5.2-3.1           GNU readline and history libraries
ii  libstdc++6             4.3.2-1.1         The GNU Standard C++ Library v3
ii  libsuitesparse-3.1.0   3.1.0-3           collection of libraries for comput
ii  texinfo                4.11.dfsg.1-4     Documentation system for on-line i
ii  zlib1g                 1: compression library - runtime

Versions of packages octave3.0 recommends:
ii  gnuplot                       4.2.2-1.2  A command-line driven interactive 
ii  libatlas3gf-base              3.6.0-22   Automatically Tuned Linear Algebra

Versions of packages octave3.0 suggests:
ii  octave3.0-doc            1:3.0.1-6lenny3 PDF documentation on the GNU Octav
ii  octave3.0-emacsen        1:3.0.1-6lenny3 Emacs support for the GNU Octave l
ii  octave3.0-headers        1:3.0.1-6lenny3 header files for the GNU Octave la
ii  octave3.0-htmldoc        1:3.0.1-6lenny3 HTML documentation on the GNU Octa
ii  octave3.0-info           1:3.0.1-6lenny3 GNU Info documentation on the GNU 

-- no debconf information

--- End Message ---
--- Begin Message ---
I am hereby closing these two bug reports:

    #523085 octave3.0: clear -all causes segfault and coredump
    #528078 octave3.0: Segfault when doing a big calcul.

They were actually due to a problem in some Octave-Forge packages whose
binding code was generated using SWIG.  The two packages distributed in
Debian that fall in this case (octave-ftp and octave-ann) have been
changed such as they are not autoloaded and a warning message is issued
when the user load the pacakge into Octave.




--- End Message ---

Reply to: