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From "Gerald Richter" <rich...@ecos.de>
Subject RE: Segfault or no content
Date Tue, 08 Mar 2005 20:41:50 GMT
Hi,

Please try to add a

PerlModule Embperl

After the LoadModule embperl_module ....

Into your httpd.conf

Does this solve your problem?

Gerald


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Gerald Richter            ecos electronic communication services gmbh
IT-Securitylösungen * Webapplikationen mit Apache/Perl/mod_perl/Embperl

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E-Mail:     richter@ecos.de          Voice:   +49 6133 939-122
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ECOS BB-5000 Firewall- und IT-Security Appliance: www.bb-5000.info
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> -----Original Message-----
> From: Dan Wilga [mailto:dwilga@MtHolyoke.edu] 
> Sent: Tuesday, March 08, 2005 7:28 PM
> To: embperl@perl.apache.org
> Subject: Segfault or no content
> 
> I am getting a consistent segfault in Embperl, that I'd like 
> some help in diagnosing. I am using:
> 
> RHEL AS 4, kernel 2.6.11
> with these things I compiled myself:
>    apache 2.0.53
>    perl 5.8.6
>    mod_perl-2.0.0-RC4
>    Embperl 2.0rc2
> 
> The problem happens with earlier versions of everything, as 
> well (even Emb 1.x). Here is the relevant section of httpd.conf:
> 
> AddType         text/html .epl
> LoadModule      embperl_module 
> /usr/lib/perl5/site_perl/5.8.6/i686-linux/auto/Embperl/Embperl.so
> Embperl_UseEnv  on
> SetEnv          EMBPERL_DEBUG 0
> SetEnv          EMBPERL_APPNAME lottery
> SetEnv          EMBPERL_SESSION_HANDLER_CLASS no
> PerlSetEnv      EMBPERL_SESSION_HANDLER_CLASS no
> 
> <Files *.epl>
>    PerlSetEnv    EMBPERL_SESSION_HANDLER_CLASS no
>    SetHandler    perl-script
>    PerlResponseHandler   Embperl::Object
>    Options       ExecCGI
> </Files>
> 
> <Location /lottery>
>    DirectoryIndex index.epl index.html index.shtml 
> default.html blocked.html
>    PerlSetEnv    EMBPERL_OBJECT_BASE hello.epl
>    PerlSetEnv    EMBPERL_FILESMATCH "\.epl$"
>    PerlResponseHandler   Embperl::Object
> </Location>
> 
> The above config uses "hello.epl", which is just:
> 
> <HTML><HEAD></HEAD><BODY>
> [+ "Hello world!" +]
> </BODY></HTML>
> 
> If I do not include a "use Embperl" line in my startup 
> script, then the first request for a ".epl" file works fine, 
> but the second request for the *same page* will segfault. 
> This is the output from a gdb run with "-X -DSSL":
> 
> Program received signal SIGSEGV, Segmentation fault.
> [Switching to Thread -1208875328 (LWP 30771)]
> 0xb7e2fb52 in S_hv_fetch_common () from /etc/httpd/modules/mod_perl.so
> (gdb) bt
> #0  0xb7e2fb52 in S_hv_fetch_common () from 
> /etc/httpd/modules/mod_perl.so
> #1  0xb7e31000 in Perl_hv_fetch () from /etc/httpd/modules/mod_perl.so
> #2  0xb7b93367 in EMBPERL2_GetHashValueStr ()
>     from 
> /usr/lib/perl5/site_perl/5.8.6/i686-linux/auto/Embperl/Embperl.so
> #3  0xb7b9f0a1 in embperl_GetCGIReqConfig ()
>     from 
> /usr/lib/perl5/site_perl/5.8.6/i686-linux/auto/Embperl/Embperl.so
> #4  0xb7bb6c91 in embperl_GetApacheReqConfig ()
>     from 
> /usr/lib/perl5/site_perl/5.8.6/i686-linux/auto/Embperl/Embperl.so
> #5  0xb7b9b1c2 in embperl_SetupRequest ()
>     from 
> /usr/lib/perl5/site_perl/5.8.6/i686-linux/auto/Embperl/Embperl.so
> #6  0xb7b9db70 in embperl_InitRequest ()
>     from 
> /usr/lib/perl5/site_perl/5.8.6/i686-linux/auto/Embperl/Embperl.so
> #7  0xb7b86bff in XS_Embperl__Req_InitRequest ()
>     from 
> /usr/lib/perl5/site_perl/5.8.6/i686-linux/auto/Embperl/Embperl.so
> #8  0xb7e3ace8 in Perl_pp_entersub () from 
> /etc/httpd/modules/mod_perl.so
> #9  0xb7e34632 in Perl_runops_standard () from 
> /etc/httpd/modules/mod_perl.so #10 0xb7dd7fe9 in Perl_call_sv 
> () from /etc/httpd/modules/mod_perl.so
> #11 0xb7dbe88f in modperl_callback () from 
> /etc/httpd/modules/mod_perl.so
> #12 0xb7dbefa5 in modperl_callback_run_handlers ()
>     from /etc/httpd/modules/mod_perl.so
> #13 0xb7dbf343 in modperl_callback_per_dir ()
>     from /etc/httpd/modules/mod_perl.so
> #14 0xb7dba7a5 in modperl_response_handler_cgi ()
>     from /etc/httpd/modules/mod_perl.so
> #15 0x080672ce in ap_run_handler (r=0x8d45740) at config.c:152
> #16 0x08067699 in ap_invoke_handler (r=0x8d45740) at config.c:364
> #17 0x08064ee5 in ap_process_request (r=0x8d45740) at 
> http_request.c:249
> #18 0x08060bb1 in ap_process_http_connection (c=0x8d37200) at 
> http_core.c:251
> #19 0x0806f4e2 in ap_run_process_connection (c=0x8d37200) at 
> connection.c:43 #20 0x08065aa9 in child_main 
> (child_num_arg=0) at prefork.c:610
> #21 0x08065c9d in make_child (s=0x809be58, slot=0) at prefork.c:650
> #22 0x08065d64 in startup_children (number_to_start=5) at 
> prefork.c:722
> #23 0x08066437 in ap_mpm_run (_pconf=0xbffff500, 
> plog=0x80c4150, s=0xbffff504)
>      at prefork.c:941
> #24 0x0806b4e7 in main (argc=3, argv=0xbffff6a4) at main.c:618
> 
> This is similar to a problem encountered in this thread:
> 
>    http://www2.ecos.de/~mailarc/embperl/2004-04/msg00110.html
> 
> the solution for which was to include "use Embperl" in the 
> startup script. But if I do this, then:
> 
> - web pages which use Embperl (ending in .epl) return no 
> content and no errors
> - and, the perl-status URL for Embperl [hostname/perl-status?Embperl]
> segfaults:
> 
> Program received signal SIGSEGV, Segmentation fault.
> [Switching to Thread -1208875328 (LWP 16726)]
> 0xb7b989d7 in EMBPERL2_mgGetCurrNode ()
>     from 
> /usr/lib/perl5/site_perl/5.8.6/i686-linux/auto/Embperl/Embperl.so
> (gdb) bt
> #0  0xb7b989d7 in EMBPERL2_mgGetCurrNode ()
>     from 
> /usr/lib/perl5/site_perl/5.8.6/i686-linux/auto/Embperl/Embperl.so
> #1  0xb7e273b2 in Perl_mg_get () from /etc/httpd/modules/mod_perl.so
> #2  0xb7e53f7f in Perl_sv_setsv_flags () from 
> /etc/httpd/modules/mod_perl.so
> #3  0xb7e559ca in Perl_sv_mortalcopy () from 
> /etc/httpd/modules/mod_perl.so
> #4  0xb7e729ad in Perl_pp_leavetry () from 
> /etc/httpd/modules/mod_perl.so
> #5  0xb7e34632 in Perl_runops_standard () from 
> /etc/httpd/modules/mod_perl.so
> #6  0xb7dd7fe9 in Perl_call_sv () from /etc/httpd/modules/mod_perl.so
> #7  0xb7dbe88f in modperl_callback () from 
> /etc/httpd/modules/mod_perl.so
> #8  0xb7dbefa5 in modperl_callback_run_handlers ()
>     from /etc/httpd/modules/mod_perl.so
> #9  0xb7dbf343 in modperl_callback_per_dir ()
>     from /etc/httpd/modules/mod_perl.so
> #10 0xb7dba7a5 in modperl_response_handler_cgi ()
>     from /etc/httpd/modules/mod_perl.so
> #11 0x080672ce in ap_run_handler (r=0x8e2bca8) at config.c:152
> #12 0x08067699 in ap_invoke_handler (r=0x8e2bca8) at config.c:364
> #13 0x08064ee5 in ap_process_request (r=0x8e2bca8) at 
> http_request.c:249
> #14 0x08060bb1 in ap_process_http_connection (c=0x8e05088) at 
> http_core.c:251
> #15 0x0806f4e2 in ap_run_process_connection (c=0x8e05088) at 
> connection.c:43
> #16 0x08065aa9 in child_main (child_num_arg=0) at prefork.c:610
> #17 0x08065c9d in make_child (s=0x809be58, slot=0) at prefork.c:650
> #18 0x08065d64 in startup_children (number_to_start=5) at 
> prefork.c:722
> #19 0x08066437 in ap_mpm_run (_pconf=0xbffff500, 
> plog=0x80c4150, s=0xbffff504)
>      at prefork.c:941
> #20 0x0806b4e7 in main (argc=3, argv=0xbffff6a4) at main.c:618
> 
> Any ideas?
> -- 
> Dan Wilga                                         dwilga@mtholyoke.edu
> Web Administrator                             http://www.mtholyoke.edu
> Mount Holyoke College                                Tel: 413-538-3027
> South Hadley, MA  01075            "Who left the cake out in 
> the rain?"
> 
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