http://www.perlmonks.org?node_id=1002750


in reply to unusual perl segfaults

perl version is perl-5.8.8-32.el5_6.3 
 [~]# perl --version

This is perl, v5.8.8 built for x86_64-linux

[download]
OS is CentOS release 5.8

Replies are listed 'Best First'.
Re^2: unusual perl segfaults
by Anonymous Monk on Nov 08, 2012 at 21:22 UTC
    additional info 
    Summary of my perl5 (revision 5 version 8 subversion 8) configuration:
  Platform:
    osname=linux, osvers=2.6.18-128.el5xen, archname=x86_64-linux
    uname='linux default.localhost.com 2.6.18-128.el5xen #1 smp wed ja
+n 21 11:12:42 est 2009 x86_64 x86_64 x86_64 gnulinux '
    config_args='-des -Dprefix=/usr/local -Doptimize=-Os -Duseshrplib 
+-Dusemymalloc=y -Accflags=-fPIC -DPIC -m64 -Dlibpth=/usr/local/lib64 
+/lib64 /usr/lib64 -Aldflags=-L/usr/lib64 -L/lib64 -lresolv -lnsl -ldl
+ -lm -lcrypt -lutil -lc'
    hint=recommended, useposix=true, d_sigaction=define
    usethreads=undef use5005threads=undef useithreads=undef usemultipl
+icity=undef
    useperlio=define d_sfio=undef uselargefiles=define usesocks=undef
    use64bitint=define use64bitall=define uselongdouble=undef
    usemymalloc=y, bincompat5005=undef
  Compiler:
    cc='cc', ccflags ='-fPIC -DPIC -m64 -fno-strict-aliasing -pipe -Wd
+eclaration-after-statement -I/usr/local/include -D_LARGEFILE_SOURCE -
+D_FILE_OFFSET_BITS=64 -I/usr/include/gdbm',
    optimize='-Os',
    cppflags='-fPIC -DPIC -m64 -fno-strict-aliasing -pipe -Wdeclaratio
+n-after-statement -I/usr/local/include -I/usr/include/gdbm'
    ccversion='', gccversion='4.1.2 20080704 (Red Hat 4.1.2-51)', gcco
+sandvers=''
    intsize=4, longsize=8, ptrsize=8, doublesize=8, byteorder=12345678
    d_longlong=define, longlongsize=8, d_longdbl=define, longdblsize=1
+6
    ivtype='long', ivsize=8, nvtype='double', nvsize=8, Off_t='off_t',
+ lseeksize=8
    alignbytes=8, prototype=define
  Linker and Libraries:
    ld='cc', ldflags =' -L/usr/lib64 -L/lib64 -lresolv -lnsl -ldl -lm 
+-lcrypt -lutil -lc'
    libpth=/usr/local/lib64 /lib64 /usr/lib64
    libs=-lnsl -lgdbm -ldb -ldl -lm -lcrypt -lutil -lc
    perllibs=-lnsl -ldl -lm -lcrypt -lutil -lc
    libc=/lib/libc-2.5.so, so=so, useshrplib=true, libperl=libperl.so
    gnulibc_version='2.5'
  Dynamic Linking:
    dlsrc=dl_dlopen.xs, dlext=so, d_dlsymun=undef, ccdlflags='-Wl,-E -
+Wl,-rpath,/usr/local/lib/perl5/5.8.8/x86_64-linux/CORE'
    cccdlflags='-fpic', lddlflags='-shared -L/usr/lib64 -L/lib64'


Characteristics of this binary (from libperl):
  Compile-time options: MYMALLOC PERL_MALLOC_WRAP USE_64_BIT_ALL
                        USE_64_BIT_INT USE_LARGE_FILES USE_PERLIO
  Built under linux
  Compiled at Nov 25 2011 14:21:17
  @INC:
    /usr/local/lib/perl5/5.8.8/x86_64-linux
    /usr/local/lib/perl5/5.8.8
    /usr/local/lib/perl5/site_perl/5.8.8/x86_64-linux
    /usr/local/lib/perl5/site_perl/5.8.8
    /usr/local/lib/perl5/site_perl
    .

    [download]
[reply]
[d/l]
      it seems i was able to resolve my problem by setting the data segment size value. 
       ulimit -n 1024 -u 35 -m 200000 -d unlimited -s 8192 -c 200000 -v 2000
+00

      [download]
      after setting I didn't experience core dumps anymore.
[reply]
[d/l]

        Thank you so much, it has helped in my case too!

        V.Melnik
[reply]

In Section Seekers of Perl Wisdom