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1. Problem Description:
[System: Solaris 9, apache-2.0.61, Perl 5.8.8, mod_perl 2.0.3, and
also mod_perl 2.0.4-dev (from svn checkout yesterday).
httpd segfaults when I access this CGI, on the second or subsequent
access (but not the first) after restarting the server:
use CGI qw/:standard/;
use strict;
my $q = CGI->new();
handle_response();
exit(0);
sub handle_response() {
$q->redirect( "http://slashdot.org"; );
}
I'm accessing this at http://<server>/mp/crash_me
Note that if I get rid of handle_response() and just put the
$q->redirect() call directly where the call to handle_response()
call is, there is no segfault problem.
>From error_log:
[Wed Nov 21 09:32:51 2007] [notice] Apache/2.0.61 (Unix)
mod_perl/2.0.4-dev Perl/v5.8.8 configured -- resuming normal
operations
ap_get_server_banner() not available until httpd/2.2.4 falling
back to ap_get_server_version() at
/data/software/perl/perl-5.8.8/lib/5.8.8/sun4-solaris/XSLoader.pm line
94.
ap_get_server_description() not available until httpd/2.2.4
falling back to ap_get_server_version() at
/data/software/perl/perl-5.8.8/lib/5.8.8/sun4-solaris/XSLoader.pm line
94.
ap_get_server_banner() not available until httpd/2.2.4 falling
back to ap_get_server_version() at
/data/software/perl/perl-5.8.8/lib/5.8.8/sun4-solaris/XSLoader.pm line
94.
ap_get_server_description() not available until httpd/2.2.4
falling back to ap_get_server_version() at
/data/software/perl/perl-5.8.8/lib/5.8.8/sun4-solaris/XSLoader.pm line
94.
[Wed Nov 21 09:33:13 2007] [notice] child pid 8842 exit signal
Segmentation fault (11), possible coredump in /tmp
>From httpd.conf:
CoreDumpDirectory /tmp
Alias /mp/ /data/software/www/mp/
PerlRequire /data/software/www/mp/startup.pl
<Location /mp>
SetHandler perl-script
PerlResponseHandler ModPerl::Registry
PerlOptions +ParseHeaders
Options +ExecCGI
Order allow,deny
Allow from all
</Location>
startup.pl is just:
use lib qw(/data/software/www/mp/lib);
1;
2. Used Components and their Configuration:
*** mod_perl version 2.000004
*** using
/data/software/perl/perl-5.8.8/lib/site_perl/5.8.8/sun4-solaris/Apache2/BuildConfig.pm
*** Makefile.PL options:
MP_APR_LIB => aprext
MP_APXS => /data/software/www/apache-2.0.61-maint/bin/apxs
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
-L/data/software/www/apache-2.0.61-maint/lib -laprutil-0 -lexpat
-L/data/software/www/apache-2.0.61-maint/lib
-L/data/software/www/apache-2.0.61-maint/lib -lapr-0 -lsendfile -lrt
-lm -lsocket -lnsl -lresolv -lpthread -ldl
*** /data/software/perl/perl-5.8.8/bin/perl -V
Summary of my perl5 (revision 5 version 8 subversion 8) configuration:
Platform:
osname=solaris, osvers=2.9, archname=sun4-solaris
uname='sunos XXXXXXX.umd.edu 5.9 generic_122300-08 sun4u sparc
sunw,ultra-30 '
config_args=''
hint=recommended, useposix=true, d_sigaction=define
usethreads=undef use5005threads=undef useithreads=undef
usemultiplicity=undef
useperlio=define d_sfio=undef uselargefiles=define usesocks=undef
use64bitint=undef use64bitall=undef uselongdouble=undef
usemymalloc=n, bincompat5005=undef
Compiler:
cc='/opt/SUNWspro/bin/cc', ccflags =' -D_LARGEFILE_SOURCE
-D_FILE_OFFSET_BITS=64',
optimize='-O',
cppflags=''
ccversion='Sun C 5.8 Patch 121015-01 2006/01/26', gccversion='',
gccosandvers=''
intsize=4, longsize=4, ptrsize=4, doublesize=8, byteorder=4321
d_longlong=define, longlongsize=8, d_longdbl=define, longdblsize=16
ivtype='long', ivsize=4, nvtype='double', nvsize=8, Off_t='off_t',
lseeksize=8
alignbytes=8, prototype=define
Linker and Libraries:
ld='/opt/SUNWspro/bin/cc', ldflags =' -L/usr/lib -L/usr/ccs/lib
-L/afs/glue.umd.edu/software/sunstudio/11/SUNWspro/prod/lib/v8plus
-L/afs/glue.umd.ed
u/software/sunstudio/11/SUNWspro/prod/lib -L/lib '
libpth=/usr/lib /usr/ccs/lib
/afs/glue.umd.edu/software/sunstudio/11/SUNWspro/prod/lib/v8plus
/afs/glue.umd.edu/software/sunstudio/11/SUNWspro/prod/l
ib /lib
libs=-lsocket -lnsl -ldl -lm -lc
perllibs=-lsocket -lnsl -ldl -lm -lc
libc=/lib/libc.so, so=so, useshrplib=false, libperl=libperl.a
gnulibc_version=''
Dynamic Linking:
dlsrc=dl_dlopen.xs, dlext=so, d_dlsymun=undef, ccdlflags=' '
cccdlflags='-KPIC', lddlflags='-G -L/usr/lib -L/usr/ccs/lib
-L/afs/glue.umd.edu/software/sunstudio/11/SUNWspro/prod/lib/v8plus
-L/afs/glue.umd.edu/so
ftware/sunstudio/11/SUNWspro/prod/lib -L/lib'
Characteristics of this binary (from libperl):
Compile-time options: PERL_MALLOC_WRAP USE_LARGE_FILES USE_PERLIO
Built under solaris
Compiled at Nov 13 2007 15:43:13
%ENV:
PERL_LWP_USE_HTTP_10="1"
@INC:
/data/software/perl/perl-5.8.8/lib/5.8.8/sun4-solaris
/data/software/perl/perl-5.8.8/lib/5.8.8
/data/software/perl/perl-5.8.8/lib/site_perl/5.8.8/sun4-solaris
/data/software/perl/perl-5.8.8/lib/site_perl/5.8.8
/data/software/perl/perl-5.8.8/lib/site_perl
.
*** Packages of interest status:
Apache2 : -
Apache2::Request : -
CGI : 3.15
ExtUtils::MakeMaker: 6.36
LWP : 5.808
mod_perl : -
mod_perl2 : 2.000004
3. This is the core dump trace: (if you get a core dump):
Core was generated by
`/data/software/www/apache-2.0.61-maint/bin/httpd -k start'.
Program terminated with signal 11, Segmentation fault.
#0 0x0008f85c in ap_get_module_config (cv=0x6565702d, m=0xfee81150)
at util_debug.c:106
106 return ((void **)cv)[m->module_index];
(gdb) bt
#0 0x0008f85c in ap_get_module_config (cv=0x6565702d, m=0xfee81150)
at util_debug.c:106
#1 0xfec436c8 in XS_Apache2__RequestRec_send_cgi_header (cv=0x251480)
at
/export/data/software/www/build/mod_perl-2.0-svn/WrapXS/Apache2/Response/Response.xs:149
#2 0xfeddc4d0 in Perl_pp_entersub () from
/data/software/www/apache/modules/mod_perl.so
#3 0xfedd2d5c in Perl_runops_standard () from
/data/software/www/apache/modules/mod_perl.so
#4 0xfed6fd30 in Perl_call_sv () from
/data/software/www/apache/modules/mod_perl.so
#5 0xfed435b8 in modperl_callback (handler=0x1f7200, p=0x222898,
r=0x2228d0, s=0xf0458, args=0x276ac0)
at modperl_callback.c:101
#6 0xfed441a4 in modperl_callback_run_handlers (idx=6, type=4,
r=0x2228d0, c=0x0, s=0xf0458, pconf=0x0, plog=0x0,
ptemp=0x0, run_mode=MP_HOOK_RUN_FIRST) at modperl_callback.c:262
#7 0xfed44888 in modperl_callback_per_dir (idx=6, r=0x2228d0,
run_mode=MP_HOOK_RUN_FIRST) at modperl_callback.c:371
#8 0xfed3ce34 in modperl_response_handler_run (r=0x2228d0, finish=0)
at mod_perl.c:999
#9 0xfed3d204 in modperl_response_handler_cgi (r=0x2228d0) at mod_perl.c:1099
#10 0x00075c04 in ap_run_handler (r=0x2228d0) at config.c:153
#11 0x000768cc in ap_invoke_handler (r=0x2228d0) at config.c:364
#12 0x00054604 in ap_process_request (r=0x2228d0) at http_request.c:249
#13 0x0004b61c in ap_process_http_connection (c=0x21a988) at http_core.c:253
#14 0x0008be4c in ap_run_process_connection (c=0x21a988) at connection.c:43
#15 0x0008c470 in ap_process_connection (c=0x21a988, csd=0x21a8b0) at
connection.c:176
#16 0x000735a4 in child_main (child_num_arg=1) at prefork.c:610
#17 0x000737d0 in make_child (s=0xf0458, slot=1) at prefork.c:704
#18 0x00073bb8 in perform_idle_server_maintenance (p=0xebcb8) at prefork.c:839
#19 0x00074240 in ap_mpm_run (_pconf=0xebcb8, plog=0x123d98,
s=0xf0458) at prefork.c:1040
#20 0x0007f468 in main (argc=3, argv=0xffbff764) at main.c:636
Current language: auto; currently minimal
This report was generated by /data/software/perl/current/bin/mp2bug on
Wed Nov 21 14:34:03 2007 GMT.
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