Re: Help on perl core dump

[Mike Dunaway]

So what was the question?

On Jan 28, 2013, at 5:48 AM, karthik sankaran  wrote:

> gdb /usr/bin/perl /piroot/corefiles/core.21394
> 
> GNU gdb (GDB) Red Hat Enterprise Linux (7.2-56.el6)
> 
> Copyright (C) 2010 Free Software Foundation, Inc.
> 
> License GPLv3+: GNU GPL version 3 or later  
> This is free software: you are free to change and redistribute it.
> 
> There is NO WARRANTY, to the extent permitted by law.  Type "show copying"
> 
> and "show warranty" for details.
> 
> This GDB was configured as "x86_64-redhat-linux-gnu".
> 
> For bug reporting instructions, please see:
> 
> ...
> 
> Reading symbols from /usr/bin/perl...(no debugging symbols found)...done.
> 
> [New Thread 21394]
> 
> 
> 
> warning: .dynamic section for "/lib64/libc.so.6" is not at the expected
> address (wrong library or version mismatch?)
> 
> Reading symbols from /usr/lib64/perl5/CORE/libperl.so...(no debugging
> symbols found)...done.
> 
> Loaded symbols for /usr/lib64/perl5/CORE/libperl.so
> 
> Reading symbols from /lib64/libresolv.so.2...(no debugging symbols
> found)...done.
> 
> Loaded symbols for /lib64/libresolv.so.2
> 
> Reading symbols from /lib64/libnsl.so.1...(no debugging symbols
> found)...done.
> 
> Loaded symbols for /lib64/libnsl.so.1
> 
> Reading symbols from /lib64/libdl.so.2...(no debugging symbols
> found)...done.
> 
> Loaded symbols for /lib64/libdl.so.2
> 
> Reading symbols from /lib64/libm.so.6...(no debugging symbols found)...done.
> 
> Loaded symbols for /lib64/libm.so.6
> 
> Reading symbols from /lib64/libcrypt.so.1...(no debugging symbols
> found)...done.
> 
> Loaded symbols for /lib64/libcrypt.so.1
> 
> Reading symbols from /lib64/libutil.so.1...(no debugging symbols
> found)...done.
> 
> Loaded symbols for /lib64/libutil.so.1
> 
> Reading symbols from /lib64/libpthread.so.0...(no debugging symbols
> found)...done.
> 
> [Thread debugging using libthread_db enabled]
> 
> Loaded symbols for /lib64/libpthread.so.0
> 
> Reading symbols from /lib64/libc.so.6...(no debugging symbols found)...done.
> 
> Loaded symbols for /lib64/libc.so.6
> 
> Reading symbols from /lib64/ld-linux-x86-64.so.2...(no debugging symbols
> found)...done.
> 
> Loaded symbols for /lib64/ld-linux-x86-64.so.2
> 
> Reading symbols from /usr/lib64/libfreebl3.so...(no debugging symbols
> found)...done.
> 
> Loaded symbols for /usr/lib64/libfreebl3.so
> 
> Reading symbols from /usr/local/lib64/perl5/auto/DBI/DBI.so...done.
> 
> Loaded symbols for /usr/local/lib64/perl5/auto/DBI/DBI.so
> 
> Reading symbols from /usr/lib64/perl5/auto/List/Util/Util.so...(no
> debugging symbols found)...done.
> 
> Loaded symbols for /usr/lib64/perl5/auto/List/Util/Util.so
> 
> Reading symbols from /usr/local/lib64/perl5/auto/Time/HiRes/HiRes.so...done.
> 
> Loaded symbols for /usr/local/lib64/perl5/auto/Time/HiRes/HiRes.so
> 
> Reading symbols from /lib64/librt.so.1...(no debugging symbols
> found)...done.
> 
> Loaded symbols for /lib64/librt.so.1
> 
> Reading symbols from /usr/lib64/perl5/auto/Sys/Hostname/Hostname.so...(no
> debugging symbols found)...done.
> 
> Loaded symbols for /usr/lib64/perl5/auto/Sys/Hostname/Hostname.so
> 
> Reading symbols from /usr/local/lib64/perl5/auto/Params/Util/Util.so...done.
> 
> Loaded symbols for /usr/local/lib64/perl5/auto/Params/Util/Util.so
> 
> Reading symbols from
> /usr/local/lib64/perl5/auto/Package/Stash/XS/XS.so...done.
> 
> Loaded symbols for /usr/local/lib64/perl5/auto/Package/Stash/XS/XS.so
> 
> Reading symbols from
> /usr/local/lib64/perl5/auto/List/MoreUtils/MoreUtils.so...done.
> 
> Loaded symbols for /usr/local/lib64/perl5/auto/List/MoreUtils/MoreUtils.so
> 
> Reading symbols from
> /usr/local/lib64/perl5/auto/Params/Validate/XS/XS.so...done.
> 
> Loaded symbols for /usr/local/lib64/perl5/auto/Params/Validate/XS/XS.so
> 
> Reading symbols from /usr/lib64/perl5/auto/IO/IO.so...(no debugging symbols
> found)...done.
> 
> Loaded symbols for /usr/lib64/perl5/auto/IO/IO.so
> 
> Reading symbols from /usr/lib64/perl5/auto/Fcntl/Fcntl.so...(no debugging
> symbols found)...done.
> 
> Loaded symbols for /usr/lib64/perl5/auto/Fcntl/Fcntl.so
> 
> Reading symbols from /usr/lib64/perl5/auto/Storable/Storable.so...(no
> debugging symbols found)...done.
> 
> Loaded symbols for /usr/lib64/perl5/auto/Storable/Storable.so
> 
> Reading symbols from /usr/lib64/perl5/auto/Encode/Encode.so...(no debugging
> symbols found)...done.
> 
> Loaded symbols for /usr/lib64/perl5/auto/Encode/Encode.so
> 
> Reading symbols from /usr/local/lib64/perl5/auto/YAML/Syck/Syck.so...done.
> 
> Loaded symbols for /usr/local/lib64/perl5/auto/YAML/Syck/Syck.so
> 
> Reading symbols from /usr/lib64/perl5/auto/XML/Parser/Expat/Expat.so...(no
> debugging symbols found)...done.
> 
> Loaded symbols for /usr/lib64/perl5/auto/XML/Parser/Expat/Expat.so
> 
> Reading symbols from /lib64/libexpat.so.1...(no debugging symbols
> found)...done.
> 
> Loaded symbols for /lib64/libexpat.so.1

Re: Help on perl core dump

[Bob goolsby]

I suspect the real question is: "Why am I trying to debug a Perl
configuration problem with the gdb()?  Why didn't I read the first few
lines of the error message (starting with "warning:") and fix the
problem?"  I get enough gdb() practice running against some gnarly
(and barkley) C code in my current contract.  ("We have this piece of
Legacy that we lost the source on, and we'd like it rewritten in a
more modern/friendly language")

Just because you can, does not mean you should break out the run-time
debugger for every possible problem you encounter.  As someone on Perl
Monks says (Toolic?) "When your only tool is a hammer, every problem
looks like your thumb."


B

On Mon, Jan 28, 2013 at 7:44 AM, Mike Dunaway  wrote:
> So what was the question?
>
> On Jan 28, 2013, at 5:48 AM, karthik sankaran  
> wrote:
>
>> gdb /usr/bin/perl /piroot/corefiles/core.21394
>>
>> GNU gdb (GDB) Red Hat Enterprise Linux (7.2-56.el6)
>>
>> Copyright (C) 2010 Free Software Foundation, Inc.
>>
>> License GPLv3+: GNU GPL version 3 or later >
>> This is free software: you are free to change and redistribute it.
>>
>> There is NO WARRANTY, to the extent permitted by law.  Type "show copying"
>>
>> and "show warranty" for details.
>>
>> This GDB was configured as "x86_64-redhat-linux-gnu".
>>
>> For bug reporting instructions, please see:
>>
>> ...
>>
>> Reading symbols from /usr/bin/perl...(no debugging symbols found)...done.
>>
>> [New Thread 21394]
>>
>>
>>
>> warning: .dynamic section for "/lib64/libc.so.6" is not at the expected
>> address (wrong library or version mismatch?)
>>
>> Reading symbols from /usr/lib64/perl5/CORE/libperl.so...(no debugging
>> symbols found)...done.
>>
>> Loaded symbols for /usr/lib64/perl5/CORE/libperl.so
>>
>> Reading symbols from /lib64/libresolv.so.2...(no debugging symbols
>> found)...done.
>>
>> Loaded symbols for /lib64/libresolv.so.2
>>
>> Reading symbols from /lib64/libnsl.so.1...(no debugging symbols
>> found)...done.
>>
>> Loaded symbols for /lib64/libnsl.so.1
>>
>> Reading symbols from /lib64/libdl.so.2...(no debugging symbols
>> found)...done.
>>
>> Loaded symbols for /lib64/libdl.so.2
>>
>> Reading symbols from /lib64/libm.so.6...(no debugging symbols found)...done.
>>
>> Loaded symbols for /lib64/libm.so.6
>>
>> Reading symbols from /lib64/libcrypt.so.1...(no debugging symbols
>> found)...done.
>>
>> Loaded symbols for /lib64/libcrypt.so.1
>>
>> Reading symbols from /lib64/libutil.so.1...(no debugging symbols
>> found)...done.
>>
>> Loaded symbols for /lib64/libutil.so.1
>>
>> Reading symbols from /lib64/libpthread.so.0...(no debugging symbols
>> found)...done.
>>
>> [Thread debugging using libthread_db enabled]
>>
>> Loaded symbols for /lib64/libpthread.so.0
>>
>> Reading symbols from /lib64/libc.so.6...(no debugging symbols found)...done.
>>
>> Loaded symbols for /lib64/libc.so.6
>>
>> Reading symbols from /lib64/ld-linux-x86-64.so.2...(no debugging symbols
>> found)...done.
>>
>> Loaded symbols for /lib64/ld-linux-x86-64.so.2
>>
>> Reading symbols from /usr/lib64/libfreebl3.so...(no debugging symbols
>> found)...done.
>>
>> Loaded symbols for /usr/lib64/libfreebl3.so
>>
>> Reading symbols from /usr/local/lib64/perl5/auto/DBI/DBI.so...done.
>>
>> Loaded symbols for /usr/local/lib64/perl5/auto/DBI/DBI.so
>>
>> Reading symbols from /usr/lib64/perl5/auto/List/Util/Util.so...(no
>> debugging symbols found)...done.
>>
>> Loaded symbols for /usr/lib64/perl5/auto/List/Util/Util.so
>>
>> Reading symbols from /usr/local/lib64/perl5/auto/Time/HiRes/HiRes.so...done.
>>
>> Loaded symbols for /usr/local/lib64/perl5/auto/Time/HiRes/HiRes.so
>>
>> Reading symbols from /lib64/librt.so.1...(no debugging symbols
>> found)...done.
>>
>> Loaded symbols for /lib64/librt.so.1
>>
>> Reading symbols from /usr/lib64/perl5/auto/Sys/Hostname/Hostname.so...(no
>> debugging symbols found)...done.
>>
>> Loaded symbols for /usr/lib64/perl5/auto/Sys/Hostname/Hostname.so
>>
>> Reading symbols from /usr/local/lib64/perl5/auto/Params/Util/Util.so...done.
>>
>> Loaded symbols for /usr/local/lib64/perl5/auto/Params/Util/Util.so
>>
>> Reading symbols from
>> /usr/local/lib64/perl5/auto/Package/Stash/XS/XS.so...done.
>>
>> Loaded symbols for /usr/local/lib64/perl5/auto/Package/Stash/XS/XS.so
>>
>> Reading symbols from
>> /usr/local/lib64/perl5/auto/List/MoreUtils/MoreUtils.so...done.
>>
>> Loaded symbols for /usr/local/lib64/perl5/auto/List/MoreUtils/MoreUtils.so
>>
>> Reading symbols from
>> /usr/local/lib64/perl5/auto/Params/Validate/XS/XS.so...done.
>>
>> Loaded symbols for /usr/local/lib64/perl5/auto/Params/Validate/XS/XS.so
>>
>> Reading symbols from /usr/lib64/perl5/auto/IO/IO.so...(no debugging symbols
>> found)...done.
>>
>> Loaded symbols for /usr/lib64/perl5/auto/IO/IO.so
>>
>> Reading symbols from /usr/lib64/perl5/auto/Fcntl/Fcntl.so...(no debugging
>> symbols found)...done.
>>
>> Loaded symbols for /usr/lib64/perl5/auto/Fcntl/Fcnt

Re: Help on perl core dump

[karthik sankaran]

"Why am I trying to debug a Perl
configuration problem with the gdb()?  Why didn't I read the first few
lines of the error message (starting with "warning:") and fix the
problem?"

I am seeing a lot of core dump files created by perl. The only way I know
to go through the core dump files is through the gdb. Only after going
through the gdb am seeing the WARNING message. rt?

And the last few lines of the gbd shows that perl is core dumping becaue of
some libc issues. I was trying to find if I can get some help to fix this
problem

(gdb) where

#0  0x7f320ea364a3 in ptmalloc_unlock_all2 () from /lib64/libc.so.6

#1  0x00722010 in ?? ()

#2  0x7f320fd3a500 in Perl_leave_scope () from
/usr/lib64/perl5/CORE/libperl.so

#3  0x in ?? ()


On Tue, Jan 29, 2013 at 8:49 AM, Bob goolsby  wrote:

> I suspect the real question is: "Why am I trying to debug a Perl
> configuration problem with the gdb()?  Why didn't I read the first few
> lines of the error message (starting with "warning:") and fix the
> problem?"  I get enough gdb() practice running against some gnarly
> (and barkley) C code in my current contract.  ("We have this piece of
> Legacy that we lost the source on, and we'd like it rewritten in a
> more modern/friendly language")
>
> Just because you can, does not mean you should break out the run-time
> debugger for every possible problem you encounter.  As someone on Perl
> Monks says (Toolic?) "When your only tool is a hammer, every problem
> looks like your thumb."
>
>
> B
>
> On Mon, Jan 28, 2013 at 7:44 AM, Mike Dunaway 
> wrote:
> > So what was the question?
> >
> > On Jan 28, 2013, at 5:48 AM, karthik sankaran 
> wrote:
> >
> >> gdb /usr/bin/perl /piroot/corefiles/core.21394
> >>
> >> GNU gdb (GDB) Red Hat Enterprise Linux (7.2-56.el6)
> >>
> >> Copyright (C) 2010 Free Software Foundation, Inc.
> >>
> >> License GPLv3+: GNU GPL version 3 or later <
> http://gnu.org/licenses/gpl.html
> >>
> >> This is free software: you are free to change and redistribute it.
> >>
> >> There is NO WARRANTY, to the extent permitted by law.  Type "show
> copying"
> >>
> >> and "show warranty" for details.
> >>
> >> This GDB was configured as "x86_64-redhat-linux-gnu".
> >>
> >> For bug reporting instructions, please see:
> >>
> >> ...
> >>
> >> Reading symbols from /usr/bin/perl...(no debugging symbols
> found)...done.
> >>
> >> [New Thread 21394]
> >>
> >>
> >>
> >> warning: .dynamic section for "/lib64/libc.so.6" is not at the expected
> >> address (wrong library or version mismatch?)
> >>
> >> Reading symbols from /usr/lib64/perl5/CORE/libperl.so...(no debugging
> >> symbols found)...done.
> >>
> >> Loaded symbols for /usr/lib64/perl5/CORE/libperl.so
> >>
> >> Reading symbols from /lib64/libresolv.so.2...(no debugging symbols
> >> found)...done.
> >>
> >> Loaded symbols for /lib64/libresolv.so.2
> >>
> >> Reading symbols from /lib64/libnsl.so.1...(no debugging symbols
> >> found)...done.
> >>
> >> Loaded symbols for /lib64/libnsl.so.1
> >>
> >> Reading symbols from /lib64/libdl.so.2...(no debugging symbols
> >> found)...done.
> >>
> >> Loaded symbols for /lib64/libdl.so.2
> >>
> >> Reading symbols from /lib64/libm.so.6...(no debugging symbols
> found)...done.
> >>
> >> Loaded symbols for /lib64/libm.so.6
> >>
> >> Reading symbols from /lib64/libcrypt.so.1...(no debugging symbols
> >> found)...done.
> >>
> >> Loaded symbols for /lib64/libcrypt.so.1
> >>
> >> Reading symbols from /lib64/libutil.so.1...(no debugging symbols
> >> found)...done.
> >>
> >> Loaded symbols for /lib64/libutil.so.1
> >>
> >> Reading symbols from /lib64/libpthread.so.0...(no debugging symbols
> >> found)...done.
> >>
> >> [Thread debugging using libthread_db enabled]
> >>
> >> Loaded symbols for /lib64/libpthread.so.0
> >>
> >> Reading symbols from /lib64/libc.so.6...(no debugging symbols
> found)...done.
> >>
> >> Loaded symbols for /lib64/libc.so.6
> >>
> >> Reading symbols from /lib64/ld-linux-x86-64.so.2...(no debugging symbols
> >> found)...done.
> >>
> >> Loaded symbols for /lib64/ld-linux-x86-64.so.2
> >>
> >> Reading symbols from /usr/lib64/libfreebl3.so...(no debugging symbols
> >> found)...done.
> >>
> >> Loaded symbols for /usr/lib64/libfreebl3.so
> >>
> >> Reading symbols from /usr/local/lib64/perl5/auto/DBI/DBI.so...done.
> >>
> >> Loaded symbols for /usr/local/lib64/perl5/auto/DBI/DBI.so
> >>
> >> Reading symbols from /usr/lib64/perl5/auto/List/Util/Util.so...(no
> >> debugging symbols found)...done.
> >>
> >> Loaded symbols for /usr/lib64/perl5/auto/List/Util/Util.so
> >>
> >> Reading symbols from
> /usr/local/lib64/perl5/auto/Time/HiRes/HiRes.so...done.
> >>
> >> Loaded symbols for /usr/local/lib64/perl5/auto/Time/HiRes/HiRes.so
> >>
> >> Reading symbols from /lib64/librt.so.1...(no debugging symbols
> >> found)...done.
> >>
> >> Loaded symbols for /lib64/librt.so.1
> >>
> >> Reading symbols from
> /usr/lib64/perl5/auto/Sys/Hostname/Hostname.so...(no
> >

Re: Help on perl core dump

[John SJ Anderson]

On Mon, Jan 28, 2013 at 9:27 PM, karthik sankaran
 wrote:
> I am seeing a lot of core dump files created by perl.

The perl-beginners list isn't the most appropriate forum for this
issue -- dealing with the interpreter core dumping and how to
troubleshoot that particular situation is well out of "beginner"
territory -- but if you can give us a bit more information, we may be
able to suggest better places for you to ask these questions.

Along those lines, some questions:

* Is there a specific program or piece of code that's causing the core
dump? (I.e., what are you doing to make Perl dump core? -- what's the
minimum amount of code needed to produce this segfault?)

* Can you reproduce this core dump on another machine? (I.e., have you
ruled out that there's some hardware issue at the bottom of this)

* It looks as if this is the Perl 5.10 that ships with RHEL6 (or maybe
CentOS?) -- could you confirm that? If you build your own copy of
Perl, does the segfault still happen?

thanks,
john.

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Re: Help on perl core dump

[karthik sankaran]

thanks for the reply,

The perl code uses multi-processing functionality. A parent child
functionality where the parent invokes as many childs needed and will
terminate once the child completes its process.

Yes I am seeing this core dumps in other servers also. I info I forgot to
mention is I am using perl 5.10.1, I suspected that whether this could be
an issue and I have upgraded by perl version to 5.16.2,

Will run my code on this version and will update you on the status,

Re: Help on perl core dump

[karthik sankaran]

Hi --

Even after upgrading to the latest version of perl I am seeing the core
dump files created.


On Wed, Jan 30, 2013 at 10:42 AM, karthik sankaran  wrote:

> thanks for the reply,
>
> The perl code uses multi-processing functionality. A parent child
> functionality where the parent invokes as many childs needed and will
> terminate once the child completes its process.
>
> Yes I am seeing this core dumps in other servers also. I info I forgot to
> mention is I am using perl 5.10.1, I suspected that whether this could be
> an issue and I have upgraded by perl version to 5.16.2,
>
> Will run my code on this version and will update you on the status,
>
>
>


-- 
Regards,
karthik

Re: Help on perl core dump

[Jim Gibson]

On Jan 30, 2013, at 3:14 AM, karthik sankaran wrote:

> Hi --
> 
> Even after upgrading to the latest version of perl I am seeing the core
> dump files created.
> 

I would make sure that perl and all of the XS modules you are using were 
compiled with the same compiler and libraries. When you upgraded, did you 
compile perl from source or install a binary distribution? Did you reinstall 
all of the modules?


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Re: Help on perl core dump

[karthik sankaran]

I compiled it from the source and Yes , in installed all the necessary
modules again.

this is the latest info from the gdb after upgrading to the perl version
16, subversion 2 (v5.16.2) built for x86_64-linux

Program terminated with signal 11, Segmentation fault.
#0  0x7f0686355c47 in net_real_write (net=0x29a7980, packet=0x29b6400
"\005", len=9) at
/pb2/build/sb_0-5715375-1337072270.49/mysql-5.5.25/sql/net_serv.cc:577
577 /pb2/build/sb_0-5715375-1337072270.49/mysql-5.5.25/sql/net_serv.cc:
No such file or directory.
in
/pb2/build/sb_0-5715375-1337072270.49/mysql-5.5.25/sql/net_serv.cc
Missing separate debuginfos, use: debuginfo-install
glibc-2.12-1.80.el6_3.6.x86_64 libgcc-4.4.6-3.el6.x86_64
nss-softokn-freebl-3.12.9-11.el6.x86_64 zlib-1.2.3-27.el6.x86_64
(gdb) where
#0  0x7f0686355c47 in net_real_write (net=0x29a7980, packet=0x29b6400
"\005", len=9) at
/pb2/build/sb_0-5715375-1337072270.49/mysql-5.5.25/sql/net_serv.cc:577
#1  0x7f06863561b3 in net_flush (net=0x29ae560) at
/pb2/build/sb_0-5715375-1337072270.49/mysql-5.5.25/sql/net_serv.cc:338
#2  0x7f0686356347 in net_write_command (net=0x29a7980, command=, header=0x0, head_len=0, packet=0x7fff4c914b70 "'", len=4)
at
/pb2/build/sb_0-5715375-1337072270.49/mysql-5.5.25/sql/net_serv.cc:478
#3  0x7f068635350d in cli_advanced_command (mysql=0x29a7980,
command=, header=0x0, header_length=0,
arg=0x7fff4c914b70 "'", arg_length=4,
skip_check=1 '\001', stmt=0x29b5e60) at
/pb2/build/sb_0-5715375-1337072270.49/mysql-5.5.25/sql-common/client.c:841
#4  0x7f068634a5bd in mysql_stmt_close (stmt=0x29b5e60) at
/pb2/build/sb_0-5715375-1337072270.49/mysql-5.5.25/libmysql/libmysql.c:4670
#5  0x7f0686780025 in mysql_st_destroy (sth=,
imp_sth=0x29b5bd0) at dbdimp.c:4150
#6  0x7f068678933a in XS_DBD__mysql__st_DESTROY (cv=) at ./mysql.xsi:774
#7  0x7f0688c5ecb4 in XS_DBI_dispatch () from
/usr/local/lib/perl5/site_perl/5.16.2/x86_64-linux/auto/DBI/DBI.so
#8  0x00497ad8 in Perl_pp_entersub ()
#9  0x00434066 in Perl_call_sv ()
#10 0x004a7e2c in S_curse ()
#11 0x004a860d in Perl_sv_clear ()
#12 0x004a8bd6 in Perl_sv_free2 ()
#13 0x0049eb5b in S_visit ()
#14 0x004a907e in Perl_sv_clean_objs ()
#15 0x004380f5 in perl_destruct ()
#16 0x0041e0ac in main ()
(gdb)


On Wed, Jan 30, 2013 at 9:07 PM, Jim Gibson  wrote:

>
> On Jan 30, 2013, at 3:14 AM, karthik sankaran wrote:
>
> > Hi --
> >
> > Even after upgrading to the latest version of perl I am seeing the core
> > dump files created.
> >
>
> I would make sure that perl and all of the XS modules you are using were
> compiled with the same compiler and libraries. When you upgraded, did you
> compile perl from source or install a binary distribution? Did you
> reinstall all of the modules?
>
>
> --
> To unsubscribe, e-mail: beginners-unsubscr...@perl.org
> For additional commands, e-mail: beginners-h...@perl.org
> http://learn.perl.org/
>
>
>


-- 
Regards,
karthik

Re: Help on perl core dump

[John SJ Anderson]

On Wed, Jan 30, 2013 at 9:17 PM, karthik sankaran
 wrote:
> I compiled it from the source and Yes , in installed all the necessary
> modules again.
>
> this is the latest info from the gdb after upgrading to the perl version
> 16, subversion 2 (v5.16.2) built for x86_64-linux
>
> Program terminated with signal 11, Segmentation fault.
> #0  0x7f0686355c47 in net_real_write (net=0x29a7980, packet=0x29b6400
> "\005", len=9) at
> /pb2/build/sb_0-5715375-1337072270.49/mysql-5.5.25/sql/net_serv.cc:577
> 577 /pb2/build/sb_0-5715375-1337072270.49/mysql-5.5.25/sql/net_serv.cc:
 
^^

That's not coming from Perl. I think you have a problem with your
MySQL installation.


j.

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Re: Help on perl core dump

[karthik sankaran]

Hi Guys,

Here is something I got from latest core dump files,

[root@DS002009 mos]# perl -v

This is perl 5, version 16, subversion 2 (v5.16.2) built for x86_64-linux

Copyright 1987-2012, Larry Wall

Perl may be copied only under the terms of either the Artistic License or
the
GNU General Public License, which may be found in the Perl 5 source kit.

Complete documentation for Perl, including FAQ lists, should be found on
this system using "man perl" or "perldoc perl".  If you have access to the
Internet, point your browser at http://www.perl.org/, the Perl Home Page.

[root@DS002009 mos]# gdb /usr/bin/perl core.17537
GNU gdb (GDB) Red Hat Enterprise Linux (7.2-56.el6)
Copyright (C) 2010 Free Software Foundation, Inc.
License GPLv3+: GNU GPL version 3 or later 
This is free software: you are free to change and redistribute it.
There is NO WARRANTY, to the extent permitted by law.  Type "show copying"
and "show warranty" for details.
This GDB was configured as "x86_64-redhat-linux-gnu".
For bug reporting instructions, please see:
...
Reading symbols from /usr/bin/perl...(no debugging symbols found)...done.
[New Thread 17537]

warning: .dynamic section for "/usr/local/mysql/lib/libmysqlclient.so.18"
is not at the expected address (wrong library or version mismatch?)
Reading symbols from /lib64/libnsl.so.1...(no debugging symbols
found)...done.
Loaded symbols for /lib64/libnsl.so.1
Reading symbols from /lib64/libdl.so.2...(no debugging symbols
found)...done.
Loaded symbols for /lib64/libdl.so.2
Reading symbols from /lib64/libm.so.6...(no debugging symbols found)...done.
Loaded symbols for /lib64/libm.so.6
Reading symbols from /lib64/libcrypt.so.1...(no debugging symbols
found)...done.
Loaded symbols for /lib64/libcrypt.so.1
Reading symbols from /lib64/libutil.so.1...(no debugging symbols
found)...done.
Loaded symbols for /lib64/libutil.so.1
Reading symbols from /lib64/libc.so.6...(no debugging symbols found)...done.
Loaded symbols for /lib64/libc.so.6
Reading symbols from /lib64/ld-linux-x86-64.so.2...(no debugging symbols
found)...done.
Loaded symbols for /lib64/ld-linux-x86-64.so.2
Reading symbols from /lib64/libfreebl3.so...(no debugging symbols
found)...done.
Loaded symbols for /lib64/libfreebl3.so
Reading symbols from
/usr/local/lib/perl5/site_perl/5.16.2/x86_64-linux/auto/DBI/DBI.so...(no
debugging symbols found)...done.
Loaded symbols for
/usr/local/lib/perl5/site_perl/5.16.2/x86_64-linux/auto/DBI/DBI.so
Reading symbols from
/usr/local/lib/perl5/5.16.2/x86_64-linux/auto/List/Util/Util.so...(no
debugging symbols found)...done.
Loaded symbols for
/usr/local/lib/perl5/5.16.2/x86_64-linux/auto/List/Util/Util.so
Reading symbols from
/usr/local/lib/perl5/5.16.2/x86_64-linux/auto/Time/HiRes/HiRes.so...(no
debugging symbols found)...done.
Loaded symbols for
/usr/local/lib/perl5/5.16.2/x86_64-linux/auto/Time/HiRes/HiRes.so
Reading symbols from /lib/../lib64/librt.so.1...(no debugging symbols
found)...done.
Loaded symbols for /lib/../lib64/librt.so.1
Reading symbols from /lib/../lib64/libpthread.so.0...(no debugging symbols
found)...done.
[Thread debugging using libthread_db enabled]
Loaded symbols for /lib/../lib64/libpthread.so.0
Reading symbols from
/usr/local/lib/perl5/5.16.2/x86_64-linux/auto/Sys/Hostname/Hostname.so...(no
debugging symbols found)...done.
Loaded symbols for
/usr/local/lib/perl5/5.16.2/x86_64-linux/auto/Sys/Hostname/Hostname.so
Reading symbols from
/usr/local/lib/perl5/site_perl/5.16.2/x86_64-linux/auto/Params/Util/Util.so...(no
debugging symbols found)...done.
Loaded symbols for
/usr/local/lib/perl5/site_perl/5.16.2/x86_64-linux/auto/Params/Util/Util.so
Reading symbols from
/usr/local/lib/perl5/site_perl/5.16.2/x86_64-linux/auto/Package/Stash/XS/XS.so...(no
debugging symbols found)...done.
Loaded symbols for
/usr/local/lib/perl5/site_perl/5.16.2/x86_64-linux/auto/Package/Stash/XS/XS.so
Reading symbols from
/usr/local/lib/perl5/site_perl/5.16.2/x86_64-linux/auto/List/MoreUtils/MoreUtils.so...(no
debugging symbols found)...done.
Loaded symbols for
/usr/local/lib/perl5/site_perl/5.16.2/x86_64-linux/auto/List/MoreUtils/MoreUtils.so
Reading symbols from
/usr/local/lib/perl5/site_perl/5.16.2/x86_64-linux/auto/Params/Validate/XS/XS.so...(no
debugging symbols found)...done.
Loaded symbols for
/usr/local/lib/perl5/site_perl/5.16.2/x86_64-linux/auto/Params/Validate/XS/XS.so
Reading symbols from
/usr/local/lib/perl5/5.16.2/x86_64-linux/auto/IO/IO.so...(no debugging
symbols found)...done.
Loaded symbols for /usr/local/lib/perl5/5.16.2/x86_64-linux/auto/IO/IO.so
Reading symbols from
/usr/local/lib/perl5/5.16.2/x86_64-linux/auto/Fcntl/Fcntl.so...(no
debugging symbols found)...done.
Loaded symbols for
/usr/local/lib/perl5/5.16.2/x86_64-linux/auto/Fcntl/Fcntl.so
Reading symbols from
/usr/local/lib/perl5/5.16.2/x86_64-linux/auto/Storable/Storable.so...(no
debugging symbols found)...done.
Loaded symbols for
/usr/local/lib/perl5/5.16.2

Re: Help on perl core dump

[John SJ Anderson]

On Mon, Feb 11, 2013 at 1:23 AM, karthik sankaran
 wrote:
> warning: .dynamic section for "/usr/local/mysql/lib/libmysqlclient.so.18" is
> not at the expected address (wrong library or version mismatch?)

You have a problem with your MySQL installation. The most probable
cause is that you built DBD::mysql against a particular version of
libmysqlclient and then that library was upgraded, perhaps in an OS
upgrade, and now that module and the shared library don't match up
anymore.

Try reinstalling DBD::mysql.

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