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From Fred Moyer <f...@redhotpenguin.com>
Subject Re: [mp2] mod_perl 2.0.7 Segfault When Loading Certain Perl Module
Date Tue, 14 Aug 2012 18:17:45 GMT
Can you try the latest version from source?

http://perl.apache.org/download/source.html

It looks like you are using perl 5.16, some recent fixes were
committed there. The subversion tip will likely be the 2.0.8 RC in a
week or so.

On Mon, Aug 13, 2012 at 3:01 PM, Jason Lin <jasonlin@ucar.edu> wrote:
> Hi,
>
> I work for a project that has been using mod_perl for quite a while.
> Recently, we upgraded our 64-bit web server with Perl 5.16, mod_perl 2.0.7
> (it's 2.0.6 with patch), and apache 2.2.22 on CentOS 6.3. Since then, we've
> been unable to start Apache server (segmentation faults) with same
> httpd.conf which worked previously.
>
> As far as I can tell, the segfault seems to be triggered while trying to
> load any Perl module using either PerlModule directive or in <Perl> block in
> httpd.conf that directly or indirectly use Carp, or even just try to load
> Carp itself. Strace shows that the process would segfault while loading (or
> right after loading) Carp.pm. The server can still successfully start and
> work when carefully removing such modules in httpd.conf.
>
> Is anyone seeing this same issue or have any ideas how it can be fixed other
> than trying to hack through all the Perl modules to make sure Carp is not
> called?
>
>
> perl -V
> Summary of my perl5 (revision 5 version 16 subversion 0) configuration:
>
>   Platform:
>     osname=linux, osvers=2.6.32-279.1.1.el6.x86_64, archname=x86_64-linux
>     uname='linux fox.cosmic.ucar.edu 2.6.32-279.1.1.el6.x86_64 #1 smp tue
> jul 10 13:47:21 utc 2012 x86_64 x86_64 x86_64 gnulinux '
>     config_args='-Dprefix=/ops/tools -des
> -Accflags=-DPERL_RELOCATABLE_INCPUSH'
>     hint=recommended, useposix=true, d_sigaction=define
>     useithreads=undef, usemultiplicity=undef
>     useperlio=define, d_sfio=undef, uselargefiles=define, usesocks=undef
>     use64bitint=define, use64bitall=define, uselongdouble=undef
>     usemymalloc=n, bincompat5005=undef
>   Compiler:
>     cc='cc', ccflags ='-DPERL_RELOCATABLE_INCPUSH -fno-strict-aliasing -pipe
> -fstack-protector -I/usr/local/include -D_LARGEFILE_SOURCE
> -D_FILE_OFFSET_BITS=64',
>     optimize='-O2',
>     cppflags='-DPERL_RELOCATABLE_INCPUSH -fno-strict-aliasing -pipe
> -fstack-protector -I/usr/local/include'
>     ccversion='', gccversion='4.4.6 20120305 (Red Hat 4.4.6-4)',
> gccosandvers=''
>     intsize=4, longsize=8, ptrsize=8, doublesize=8, byteorder=12345678
>     d_longlong=define, longlongsize=8, d_longdbl=define, longdblsize=16
>     ivtype='long', ivsize=8, nvtype='double', nvsize=8, Off_t='off_t',
> lseeksize=8
>     alignbytes=8, prototype=define
>   Linker and Libraries:
>     ld='cc', ldflags =' -fstack-protector -L/usr/local/lib'
>     libpth=/usr/local/lib /lib/../lib64 /usr/lib/../lib64 /lib /usr/lib
> /lib64 /usr/lib64 /usr/local/lib64
>     libs=-lnsl -lgdbm -ldl -lm -lcrypt -lutil -lc
>     perllibs=-lnsl -ldl -lm -lcrypt -lutil -lc
>     libc=, so=so, useshrplib=false, libperl=libperl.a
>     gnulibc_version='2.12'
>   Dynamic Linking:
>     dlsrc=dl_dlopen.xs, dlext=so, d_dlsymun=undef, ccdlflags='-Wl,-E'
>     cccdlflags='-fPIC', lddlflags='-shared -O2 -L/usr/local/lib
> -fstack-protector'
>
>
> Characteristics of this binary (from libperl):
>   Compile-time options: HAS_TIMES PERLIO_LAYERS PERL_DONT_CREATE_GVSV
>                         PERL_MALLOC_WRAP PERL_PRESERVE_IVUV
>                         PERL_RELOCATABLE_INCPUSH USE_64_BIT_ALL
>                         USE_64_BIT_INT USE_LARGE_FILES USE_LOCALE
>                         USE_LOCALE_COLLATE USE_LOCALE_CTYPE
>                         USE_LOCALE_NUMERIC USE_PERLIO USE_PERL_ATOF
>   Built under linux
>   Compiled at Aug  1 2012 16:14:39
>   %ENV:
>     PERL5LIB="/ops/tools/lib"
>   @INC:
>     /ops/tools/lib
>     /ops/tools/lib/perl5/site_perl/5.16.0/x86_64-linux
>     /ops/tools/lib/perl5/site_perl/5.16.0
>     /ops/tools/lib/perl5/5.16.0/x86_64-linux
>     /ops/tools/lib/perl5/5.16.0
>     .
>
> Note that we compiled Perl with relocation flag (-DPERL_RELOCATABLE_INCPUSH)
> turned on, yet same issue can also be found without the flag in our test.
>
> Any help/advice would be appreciated, thank you in advance.
>
>
> Best,
> Jason

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