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
