I'm doing a dynamic build (the default setting I believe.) here are the ldd
results (that's how we can tell, right?)
# ldd /usr/bin/perl
linux-vdso.so.1 => (0x00007ffff2dff000)
libnsl.so.1 => /lib64/libnsl.so.1 (0x00000039c3c00000)
libdl.so.2 => /lib64/libdl.so.2 (0x00000039bec00000)
libm.so.6 => /lib64/libm.so.6 (0x00000039bfc00000)
libcrypt.so.1 => /lib64/libcrypt.so.1 (0x00000039c1800000)
libutil.so.1 => /lib64/libutil.so.1 (0x00000039c4000000)
libpthread.so.0 => /lib64/libpthread.so.0 (0x00000039bf400000)
libc.so.6 => /lib64/libc.so.6 (0x00000039bf000000)
/lib64/ld-linux-x86-64.so.2 (0x00000039be800000)
libfreebl3.so => /lib64/libfreebl3.so (0x00000039c2c00000)
# ldd /etc/httpd/modules/mod_perl.so
linux-vdso.so.1 => (0x00007fff33fff000)
libnsl.so.1 => /lib64/libnsl.so.1 (0x00007fbe6ec80000)
libdl.so.2 => /lib64/libdl.so.2 (0x00007fbe6ea7c000)
libm.so.6 => /lib64/libm.so.6 (0x00007fbe6e7f7000)
libcrypt.so.1 => /lib64/libcrypt.so.1 (0x00007fbe6e5c0000)
libutil.so.1 => /lib64/libutil.so.1 (0x00007fbe6e3bd000)
libpthread.so.0 => /lib64/libpthread.so.0 (0x00007fbe6e19f000)
libc.so.6 => /lib64/libc.so.6 (0x00007fbe6de0e000)
/lib64/ld-linux-x86-64.so.2 (0x00000039be800000)
libfreebl3.so => /lib64/libfreebl3.so (0x00007fbe6dbac000)
> Date: Wed, 22 Aug 2012 17:11:32 -0600
> From: [email protected]
> To: [email protected]
> CC: [email protected]
> Subject: RE: mod_perl always segfault on thread creation
>
> Hi Rommel: Are you building statically or dynamically? I had a problem
> with segfaulting mod_perl, the solution for which eluded me for a long
> time. I had been doing a static apache/mod_perl build on CentOS 6.3
> (similar to RedHat Enterprise 6.3).
>
> I finally cured the problem by just doing a dynamic build instead. From
> what I can tell, static builds in my environment (x86_64, CentOS 6.3, perl
> 5.16.1) are pretty well broken. The dynamic build went just fine.
>
> Just a thought...
>
> --Doug Hunt
>
> [email protected]
> Software Engineer
> UCAR - COSMIC, Tel. (303) 497-2611
>
> On Wed, 22 Aug 2012, hack bear wrote:
>
> > Thanks but the trick doesn't seem to help.
> >
> > First the instruction seems wrong. With it, the resulting perl executable
> > does not even have useithreads defined.
> >
> > Then I try
> >
> > CFLAGS='-m64 -mtune=nocona' ./Configure -Dinstallusrbinperl -Dusethreads
> > -Duseithreads -Dprefix=/usr -des -A ccflags="-fPIC
> > -m64 -mtune=nocona "
> >
> > Now I get a perl with useithread and -mtune=nocona (versus -mtune=generic)
> >
> > # perl -V
> > Summary of my perl5 (revision 5 version 16 subversion 1) configuration:
> >
> > Platform:
> > osname=linux, osvers=2.6.32-131.12.1.el6.x86_64,
> > archname=x86_64-linux-thread-multi
> > uname='linux alcatraz6 2.6.32-131.12.1.el6.x86_64 #1 smp wed sep 21
> > 08:12:51 pdt 2011 x86_64 x86_64 x86_64 gnulinux '
> > config_args='-Dinstallusrbinperl -Dusethreads -Duseithreads
> > -Dprefix=/usr -des -A ccflags=-fPIC -m64 -mtune=nocona '
> > hint=previous, useposix=true, d_sigaction=define
> > useithreads=define, usemultiplicity=define
> > useperlio=define, d_sfio=undef, uselargefiles=define, usesocks=undef
> > use64bitint=define, use64bitall=define, uselongdouble=undef
> > usemymalloc=n, bincompat5005=undef
> > Compiler:
> > cc='cc', ccflags ='-D_REENTRANT -D_GNU_SOURCE -fPIC
> > -fno-strict-aliasing -pipe -fstack-protector -I/usr/local/include
> > -D_LARGEFILE_SOURCE -D_FILE_OFFSET_BITS=64 -fPIC -m64 -mtune=nocona',
> >
> > Then I install the perl build, build mod_perl and install. Verify I'm using
> > the new versions in apache. But still the script
> > produces segfault consistently.
> >
> > Did people ever get threads to work in mod_perl/apache/redhat enterprise
> > linux 6? May someone send the "perl -V" output. This
> > basic feature should work out of box on any environment.
> >
> >
> > _______________________________________________________________________________________________________________________________
> > From: [email protected]
> > To: [email protected]; [email protected]
> > Subject: RE: mod_perl always segfault on thread creation
> > Date: Tue, 21 Aug 2012 06:41:09 +0000
> >
> > Hi,
> >
> >
> >
> > You could try some options for configuring Perl given here:
> >
> > http://perl.apache.org/docs/2.0/user/install/install.pod.orig
> >
> >
> >
> > specially:
> >
> > % CFLAGS='-m64 -mtune=nocona' ./Configure -des -A ccflags=-fPIC
> >
> >
> >
> > Before doing a make.
> >
> >
> >
> > Thanks,
> >
> > Rommel.
> >
> >
> >
> >
> >
> > From: hack bear [mailto:[email protected]]
> > Sent: Tuesday, August 21, 2012 2:06 AM
> > To: [email protected]
> > Subject: mod_perl always segfault on thread creation
> >
> >
> >
> > hi,
> >
> > This is totally frustrating. My mod_perl script always causes segmentation
> > fault when it tries to create a thread. I searched
> > the Web and this forum, but there is still no definitive answers. My perl
> > and mod_perl are of pretty recent versions and I
> > check for the inclusion of useithreads config. I wrote a simple script to
> > prove it:
> >
> > use CGI;
> > use threads;
> > use Config;
> > use mod_perl;
> >
> > our $LOGGER;
> > BEGIN {
> > $LOGGER = Apache2::ServerUtil->server->log;
> > $LOGGER->error("testhread starting (CGI version ".CGI->version.")");
> > }
> >
> > my $q = CGI->new;
> > my $check = defined $Config{useithreads};
> > $LOGGER->error("useithread? $check");
> > my $v = mod_perl->VERSION;
> > $LOGGER->error("version $v");
> >
> > my $thr = threads->create(sub { }); # comment out these two lines will
> > work
> > $thr->join(); # already crashed at the line above
> >
> > $q->header(-status => '200 OK');
> >
> > It produces logs
> >
> > Aug 20 13:07:50 (4216) [error] testhread starting (CGI version 3.51)
> > Aug 20 13:07:50 (4216) [error] useithread? 1
> > Aug 20 13:07:50 (4216) [error] version 2.000004
> > Aug 20 13:07:51 (4159) [notice] child pid 4216 exit signal Segmentation
> > fault (11)
> >
> > Any way I can solve this?
> >
> > Thanks!
> >
> > (Perl -V)
> > Summary of my perl5 (revision 5 version 10 subversion 1) configuration:
> >
> > Platform:
> > osname=linux, osvers=2.6.18-274.3.1.el5,
> > archname=x86_64-linux-thread-multi
> > uname='linux hs20-bc2-5.build.redhat.com 2.6.18-274.3.1.el5 #1 smp fri
> > aug 26 18:49:02 edt 2011 x86_64 x86_64 x86_64
> > gnulinux '
> > config_args='-des -Doptimize=-O2 -g -pipe -Wall -Wp,-D_FORTIFY_SOURCE=2
> > -fexceptions -fstack-protector
> > --param=ssp-buffer-size=4 -m64 -mtune=generic -DDEBUGGING=-g
> > -Dversion=5.10.1 -Dmyhostname=localhost -Dperladmin=root@localhost
> > -Dcc=gcc -Dcf_by=Red Hat, Inc. -Dprefix=/usr -Dvendorprefix=/usr
> > -Dsiteprefix=/usr/local -Dsitelib=/usr/local/share/perl5
> > -Dsitearch=/usr/local/lib64/perl5 -Dprivlib=/usr/share/perl5
> > -Darchlib=/usr/lib64/perl5
> > -Dvendorlib=/usr/share/perl5/vendor_perl
> > -Dvendorarch=/usr/lib64/perl5/vendor_perl -Dinc_version_list=5.10.0
> > -Darchname=x86_64-linux-thread-multi -Dlibpth=/usr/local/lib64 /lib64
> > /usr/lib64 -Duseshrplib -Dusethreads -Duseithreads
> > -Duselargefiles -Dd_dosuid -Dd_semctl_semun -Di_db -Ui_ndbm -Di_gdbm
> > -Di_shadow -Di_syslog -Dman3ext=3pm -Duseperlio
> > -Dinstallusrbinperl=n -Ubincompat5005 -Uversiononly -Dpager=/usr/bin/less
> > -isr -Dd_gethostent_r_proto -Ud_endhostent_r_proto
> > -Ud_sethostent_r_proto -Ud_endprotoent_r_proto -Ud_setprotoent_r_proto
> > -Ud_endservent_r_proto -Ud_setservent_r_proto
> > -Dscriptdir=/usr/bin'
> > hint=recommended, useposix=true, d_sigaction=define
> > useithreads=define, usemultiplicity=define
> > useperlio=define, d_sfio=undef, uselargefiles=define, usesocks=undef
> > use64bitint=define, use64bitall=define, uselongdouble=undef
> > usemymalloc=n, bincompat5005=undef
> > Compiler:
> > cc='gcc', ccflags ='-D_REENTRANT -D_GNU_SOURCE -fno-strict-aliasing
> > -pipe -fstack-protector -I/usr/local/include
> > -D_LARGEFILE_SOURCE -D_FILE_OFFSET_BITS=64',
> > optimize='-O2 -g -pipe -Wall -Wp,-D_FORTIFY_SOURCE=2 -fexceptions
> > -fstack-protector --param=ssp-buffer-size=4 -m64
> > -mtune=generic',
> > cppflags='-D_REENTRANT -D_GNU_SOURCE -fno-strict-aliasing -pipe
> > -fstack-protector -I/usr/local/include'
> > ccversion='', gccversion='4.4.5 20110214 (Red Hat 4.4.5-6)',
> > 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='gcc', ldflags =' -fstack-protector'
> > libpth=/usr/local/lib64 /lib64 /usr/lib64
> > libs=-lresolv -lnsl -lgdbm -ldb -ldl -lm -lcrypt -lutil -lpthread -lc
> > perllibs=-lresolv -lnsl -ldl -lm -lcrypt -lutil -lpthread -lc
> > libc=, so=so, useshrplib=true, libperl=libperl.so
> > gnulibc_version='2.12'
> > Dynamic Linking:
> > dlsrc=dl_dlopen.xs, dlext=so, d_dlsymun=undef, ccdlflags='-Wl,-E
> > -Wl,-rpath,/usr/lib64/perl5/CORE'
> > cccdlflags='-fPIC', lddlflags='-shared -O2 -g -pipe -Wall
> > -Wp,-D_FORTIFY_SOURCE=2 -fexceptions -fstack-protector
> > --param=ssp-buffer-size=4 -m64 -mtune=generic'
> > Characteristics of this binary (from libperl):
> > Compile-time options: MULTIPLICITY PERL_DONT_CREATE_GVSV
> > PERL_IMPLICIT_CONTEXT PERL_MALLOC_WRAP
> > USE_64_BIT_ALL
> > USE_64_BIT_INT USE_ITHREADS USE_LARGE_FILES
> > USE_PERLIO USE_REENTRANT_API
> > Built under linux
> > Compiled at Oct 4 2011 10:53:24
> > @INC:
> > /usr/local/lib64/perl5
> > /usr/local/share/perl5
> > /usr/lib64/perl5/vendor_perl
> > /usr/share/perl5/vendor_perl
> > /usr/lib64/perl5
> > /usr/share/perl5
> >
> >
> >
