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Posted to modperl@perl.apache.org by Yuri Karaban <mo...@dev97.com> on 2014/04/14 14:32:19 UTC
SIGSEGV: PerlLoadModule inside VirtualHost with PerlOptions +Parent
1. Problem Description:
Looks like mod_perl executes PerlLoadModule in a context of parent Perl
interpreter and module body is evaluated in parent Perl, but
Apache2::Module::add is switching the context again and in this context
TestParam module was not defined and gv_stashpv("TestParam", FALSE)
returns NULL (at modperl_module.c:764) and gv_fetchmethod_autoload is
executed with the NULL stash (at modperl_module.c:765).
2. Used Components and their Configuration:
*** mod_perl version 2.000008
*** using /usr/lib64/perl5/vendor_perl/5.18.2/x86_64-linux-thread-multi/Apache2/BuildConfig.pm
*** Makefile.PL options:
MP_APR_LIB => aprext
MP_APXS => /usr/sbin/apxs2
MP_COMPAT_1X => 1
MP_DEBUG => 1
MP_GENERATE_XS => 1
MP_LIBNAME => mod_perl
MP_TRACE => 1
MP_USE_DSO => 1
*** The httpd binary was not found
*** (apr|apu)-config linking info
-laprutil-1 -ldb-5.2 -lgdbm -lexpat -L/var/tmp/portage/dev-libs/apr-util-1.5.3-r1/temp
-lapr-1 -luuid -lrt -lcrypt -lpthread -ldl
*** /usr/bin/perl -V
Summary of my perl5 (revision 5 version 18 subversion 2) configuration:
Platform:
osname=linux, osvers=3.13.6-gentoo, archname=x86_64-linux-thread-multi
uname='linux localhost.localdomain 3.13.6-gentoo #1 smp preempt sat mar 29 21:30:07 eet 2014 x86_64'
config_args='-des -Duseshrplib -Darchname=x86_64-linux-thread -Dcc=x86_64-pc-linux-gnu-gcc -Doptimize=-march=core2 -O2 -pipe -Dldflags=-Wl,-O1 -Wl,--as-needed -Dprefix=/usr -Dinstallprefix=/usr -Dsiteprefix=/usr/local -Dvendorprefix=/usr -Dscriptdir=/usr/bin -Dprivlib=/usr/lib64/perl5/5.18.2 -Darchlib=/usr/lib64/perl5/5.18.2/x86_64-linux-thread-multi -Dsitelib=/usr/local/lib64/perl5/5.18.2 -Dsitearch=/usr/local/lib64/perl5/5.18.2/x86_64-linux-thread-multi -Dvendorlib=/usr/lib64/perl5/vendor_perl/5.18.2 -Dvendorarch=/usr/lib64/perl5/vendor_perl/5.18.2/x86_64-linux-thread-multi -Dman1dir=/usr/share/man/man1 -Dman3dir=/usr/share/man/man3 -Dsiteman1dir=/usr/local/man/man1 -Dsiteman3dir=/usr/local/man/man3 -Dvendorman1dir=/usr/share/man/man1 -Dvendorman3dir=/usr/share/man/man3 -Dman1ext=1 -Dman3ext=3pm -Dlibperl=libperl.so.5.18.2 -Dlocincpth=/usr/include -Dglibpth=/lib64 /usr/lib64 -Duselargefiles -Dd_semctl_semun -Dcf_by=Gentoo -Dmyhostname=localhost -Dperladmin=root@localhost -Dinstallusrbinperl=n -Ud_csh -Uusenm -Di_ndbm -Di_gdbm -Di_db -Dusethreads -DDEBUGGING=none -Dinc_version_list=5.18.0/x86_64-linux-thread-multi 5.18.0 5.18.1/x86_64-linux-thread-multi 5.18.1 -Dlibpth=/usr/local/lib64 /lib64 /usr/lib64 -Dnoextensions=ODBM_File'
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='x86_64-pc-linux-gnu-gcc', ccflags ='-D_REENTRANT -D_GNU_SOURCE -fno-strict-aliasing -pipe -D_LARGEFILE_SOURCE -D_FILE_OFFSET_BITS=64',
optimize='-march=core2 -O2 -pipe',
cppflags='-D_REENTRANT -D_GNU_SOURCE -fno-strict-aliasing -pipe'
ccversion='', gccversion='4.8.2', 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='x86_64-pc-linux-gnu-gcc', ldflags ='-Wl,-O1 -Wl,--as-needed'
libpth=/usr/local/lib64 /lib64 /usr/lib64
libs=-lnsl -lgdbm -ldb -ldl -lm -lcrypt -lutil -lpthread -lc -lgdbm_compat
perllibs=-lnsl -ldl -lm -lcrypt -lutil -lpthread -lc
libc=/lib/libc-2.18.so, so=so, useshrplib=true, libperl=libperl.so.5.18.2
gnulibc_version='2.18'
Dynamic Linking:
dlsrc=dl_dlopen.xs, dlext=so, d_dlsymun=undef, ccdlflags='-Wl,-E'
cccdlflags='-fPIC', lddlflags='-shared -march=core2 -O2 -pipe -Wl,-O1 -Wl,--as-needed'
Characteristics of this binary (from libperl):
Compile-time options: HAS_TIMES MULTIPLICITY PERLIO_LAYERS
PERL_DONT_CREATE_GVSV
PERL_HASH_FUNC_ONE_AT_A_TIME_HARD
PERL_IMPLICIT_CONTEXT PERL_MALLOC_WRAP
PERL_PRESERVE_IVUV PERL_SAWAMPERSAND USE_64_BIT_ALL
USE_64_BIT_INT USE_ITHREADS USE_LARGE_FILES
USE_LOCALE USE_LOCALE_COLLATE USE_LOCALE_CTYPE
USE_LOCALE_NUMERIC USE_PERLIO USE_PERL_ATOF
USE_REENTRANT_API
Locally applied patches:
gentoo/EUMM-RUNPATH - https://bugs.gentoo.org/105054 cpan/ExtUtils-MakeMaker: drop $PORTAGE_TMPDIR from LD_RUN_PATH
gentoo/EUMM_delete_packlist - Don't install .packlist or perllocal.pod for perl or vendor
gentoo/config_over - Remove -rpath and append LDFLAGS to lddlflags
gentoo/cpan_definstalldirs - Provide a sensible INSTALLDIRS default for modules installed from CPAN.
gentoo/cpanplus_definstalldirs - Configure CPANPLUS to use the site directories by default.
gentoo/create_libperl_soname - https://bugs.gentoo.org/286840 Set libperl soname
gentoo/drop_fstack_protector - https://bugs.gentoo.org/348557 Don't force -fstack-protector on everyone.
gentoo/enc2xs - Tweak enc2xs to follow symlinks and ignore missing @INC directories.
gentoo/mod_paths - Add /etc/perl to @INC
gentoo/patchlevel - List packaged patches for perl-5.18.2(#1) in patchlevel.h
gentoo/aix_soname - aix gcc detection and shared library soname support
gentoo/opensolars_headers - Add headers for opensolaris
gentoo/cleanup-paths - Cleanup PATH and shrpenv
gentoo/usr_local - Remove /usr/local paths
gentoo/hints_hpux - Fix hpux hints
gentoo/darwin-cc-ld - https://bugs.gentoo.org/297751 darwin: Use $CC to link
gentoo/interix - Fix interix hints
fixes/net_smtp_docs - [rt.cpan.org #36038] Document the Net::SMTP 'Port' option
debian/cpan-missing-site-dirs - Fix CPAN::FirstTime defaults with nonexisting site dirs if a parent is writable
fixes/memoize_storable_nstore - [rt.cpan.org #77790] Memoize::Storable: respect 'nstore' option not respected
fixes/net_ftp_failed_command - [rt.cpan.org #37700] Net::FTP: cope gracefully with a failed command
fixes/perlbug-patchlist - [3541c11] [perl #118433] Make perlbug look up the list of local patches at run time
fixes/module_metadata_taint_fix - [bff978f] [rt.cpan.org #88576] untaint version, if needed, in Module::Metadata
fixes/IPC-SysV-spelling - [rt.cpan.org #86736] Fix spelling of IPC_CREAT in IPC-SysV documentation
Built under linux
Compiled at Apr 5 2014 18:55:03
%ENV:
PERL_LWP_USE_HTTP_10="1"
@INC:
/etc/perl
/usr/local/lib64/perl5/5.18.2/x86_64-linux-thread-multi
/usr/local/lib64/perl5/5.18.2
/usr/lib64/perl5/vendor_perl/5.18.2/x86_64-linux-thread-multi
/usr/lib64/perl5/vendor_perl/5.18.2
/usr/local/lib64/perl5
/usr/lib64/perl5/vendor_perl
/usr/lib64/perl5/5.18.2/x86_64-linux-thread-multi
/usr/lib64/perl5/5.18.2
.
*** Packages of interest status:
Apache2 : -
Apache2::Request : -
CGI : 3.63, 3.63
ExtUtils::MakeMaker: 6.66, 6.82
LWP : 6.05
mod_perl : -
mod_perl2 : 2.000008
3. This is the core dump trace: (if you get a core dump):
#0 0x00007ffff0dd465a in Perl_gv_fetchmethod_pvn_flags ()
from /usr/lib64/libperl.so.5.18
#1 0x00007ffff11457af in modperl_module_fetch_method (my_perl=0x7492c0,
p=0x67e138, modp=0x744d78, method=0x7ffff1154763 "DIR_CREATE")
at modperl_module.c:765
#2 0x00007ffff11459d6 in modperl_module_add (p=0x67e138, s=0x688418,
name=0x946eb0 "TestParam", mod_cmds=0x94b830) at modperl_module.c:816
#3 0x00007fffede89101 in mpxs_Apache2__Module_add (my_perl=0x844970,
package=0x946eb0 "TestParam", cmds=0x94b830)
at /var/tmp/portage/www-apache/mod_perl-2.0.8/work/mod_perl-2.0.8/xs/Apache2/Module/Apache2__Module.h:90
#4 0x00007fffede895ca in XS_Apache2__Module_add (my_perl=0x844970,
cv=0x9de6e0) at Module.xs:55
#5 0x00007ffff0e412e6 in Perl_pp_entersub () from /usr/lib64/libperl.so.5.18
#6 0x00007ffff0e39936 in Perl_runops_standard ()
from /usr/lib64/libperl.so.5.18
#7 0x00007ffff0dcbb4b in Perl_eval_sv () from /usr/lib64/libperl.so.5.18
#8 0x00007ffff11312d3 in modperl_require_module (my_perl=0x844970,
pv=0x72d730 "TestParam", logfailure=0) at modperl_util.c:30
#9 0x00007ffff11299a0 in modperl_cmd_modules (parms=0x7fffffffdb70,
mconfig=0x743e78, arg=0x72d730 "TestParam") at modperl_cmd.c:190
#10 0x00007ffff112c131 in modperl_cmd_load_module (parms=0x7fffffffdb70,
mconfig=0x743e78, arg=0x72d730 "TestParam") at modperl_cmd.c:668
#11 0x0000000000440886 in invoke_cmd (cmd=0x7ffff135d678 <modperl_cmds+760>,
parms=0x7fffffffdb70, mconfig=0x743e78, args=0x72d730 "TestParam")
at config.c:757
#12 0x0000000000441bc4 in ap_walk_config_sub (current=0x72d6f0,
parms=0x7fffffffdb70, section_vector=0x743800) at config.c:1163
#13 0x0000000000441c71 in ap_walk_config (current=0x72d6f0,
parms=0x7fffffffdb70, section_vector=0x743800) at config.c:1196
#14 0x0000000000435014 in virtualhost_section (cmd=0x7fffffffdb70,
dummy=0x689b60, arg=0x7430d0 "127.0.0.1:8000") at core.c:2234
#15 0x0000000000440886 in invoke_cmd (cmd=0x460510 <core_cmds+80>,
parms=0x7fffffffdb70, mconfig=0x689b60, args=0x72d618 "127.0.0.1:8000>")
at config.c:757
#16 0x0000000000441bc4 in ap_walk_config_sub (current=0x72d5d8,
parms=0x7fffffffdb70, section_vector=0x689740) at config.c:1163
#17 0x0000000000441c71 in ap_walk_config (current=0x72d5d8,
parms=0x7fffffffdb70, section_vector=0x689740) at config.c:1196
#18 0x0000000000442fc3 in ap_process_config_tree (s=0x688418,
conftree=0x6ada78, p=0x67e138, ptemp=0x68a198) at config.c:1765
#19 0x0000000000425252 in main (argc=3, argv=0x7fffffffdda8) at main.c:645
4. This is the Apache config file:
Listen 127.0.0.1:8000
<VirtualHost 127.0.0.1:8000>
PerlOptions +Parent
PerlSwitches -I/path/to/module
PerlLoadModule TestParam
CustomLog /tmp/access.log combined
ErrorLog /tmp/error.log
</VirtualHost>
5. This is the Perl module:
package TestParam;
use strict;
use warnings;
use Apache2::Module ();
my @directives = ({ name => 'TestParam' });
Apache2::Module::add(__PACKAGE__, \@directives);
1;
This report was generated by /usr/bin/mp2bug on Mon Apr 14 11:39:36 2014 GMT.
--
E pluribus unum