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From Dan Wilga <dwi...@MtHolyoke.edu>
Subject RE: Segfault or no content
Date Tue, 08 Mar 2005 21:09:36 GMT
At 9:41 PM +0100 3/8/05, Gerald Richter wrote:
>Hi,
>
>Please try to add a
>
>PerlModule Embperl
>
>After the LoadModule embperl_module ....
>
>Into your httpd.conf

Now I only ever get the second version (no content from .epl pages, 
and "/perl-status?Embperl" crashes.)



>  > -----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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>>
>>
>
>
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-- 
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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