I noticed segfaults in my error logs a couple days ago. I am getting 1 for
about every 1K page views. I am able to reproduce it now, but still can't make
any sense of it. I'm sending a backtrace, and my environment.
It is not based on any particular or even area of my site URL. It definately
happens under greater load.
Note: Though there are a few lines in the backtrace about caching, I am NOT
using any of the caching functionality right now. At least, I do not have any
of it enabled.
My Env:
Perl: 5.8.7
EmbPerl: 2.0.0 (I did get a patch to get the caching to work via the infinate
benevolence of Gerald)
Apache: 2.0.54
The relevant (Embperl) parts of my httpd.conf is:
LoadModule embperl_module
/home/carl/projects/GOB/third-party/perl/lib/5.8.7/i686-linux/auto/Embperl/Embperl.so
PerlRequire Embperl.pm
PerlRequire /home/carl/projects/GOB/uis/pre_compile_pages.pl
Embperl_Top_Include "use strict;"
Embperl_Input_Escmode 0
Embperl_Syntax EmbperlBlocks
Embperl_Object_Base base.htt
Embperl_Options 524432
Embperl_UseEnv on
EMBPERL_LOG /home/carl/projects/GOB/third-party/apache/logs/embperl_log
EMBPERL_SESSION_HANDLER_CLASS no
EMBPERL_OPTIONS 524432
EMBPERL_ESCMODE 0
EMBPERL_DEBUG 0
* I have 3 directories that contain EmbPerl apps (3 base.htt files).
* I'm not using the Object functionality.
The backtrace is below.
I would really appreciate some input on this. I am just about to have a major
release, with a whole lot more data, a major marketing push, and a bunch of
relationships that are going to drive traffic. All of that is waiting on
resolution of this problem. I will happily do anything I can on my side to help.
-Carl
#0 0xf7d9c89d in EMBPERL2_Node_appendChild () from
/home/carl/projects/GOB/third-party/perl/lib/5.8.7/i686-linux/auto/Embperl/Embperl.so
(gdb) bt
#0 0xf7d9c89d in EMBPERL2_Node_appendChild () from
/home/carl/projects/GOB/third-party/perl/lib/5.8.7/i686-linux/auto/Embperl/Embperl.so
#1 0xf7d97a73 in embperl_Parse () from
/home/carl/projects/GOB/third-party/perl/lib/5.8.7/i686-linux/auto/Embperl/Embperl.so
#2 0xf7da55a7 in ProviderEpParse_GetContentIndex () from
/home/carl/projects/GOB/third-party/perl/lib/5.8.7/i686-linux/auto/Embperl/Embperl.so
#3 0xf7da4300 in Cache_GetContentIndex () from
/home/carl/projects/GOB/third-party/perl/lib/5.8.7/i686-linux/auto/Embperl/Embperl.so
#4 0xf7da571a in ProviderEpCompile_GetContentIndex () from
/home/carl/projects/GOB/third-party/perl/lib/5.8.7/i686-linux/auto/Embperl/Embperl.so
#5 0xf7da41c0 in Cache_GetContentSvIndex () from
/home/carl/projects/GOB/third-party/perl/lib/5.8.7/i686-linux/auto/Embperl/Embperl.so
#6 0xf7da5985 in ProviderEpRun_GetContentIndex () from
/home/carl/projects/GOB/third-party/perl/lib/5.8.7/i686-linux/auto/Embperl/Embperl.so
#7 0xf7da4300 in Cache_GetContentIndex () from
/home/carl/projects/GOB/third-party/perl/lib/5.8.7/i686-linux/auto/Embperl/Embperl.so
#8 0xf7d8558b in ProcessFile () from
/home/carl/projects/GOB/third-party/perl/lib/5.8.7/i686-linux/auto/Embperl/Embperl.so
#9 0xf7d859ba in embperl_RunComponent () from
/home/carl/projects/GOB/third-party/perl/lib/5.8.7/i686-linux/auto/Embperl/Embperl.so
#10 0xf7d85c93 in embperl_ExecuteComponent () from
/home/carl/projects/GOB/third-party/perl/lib/5.8.7/i686-linux/auto/Embperl/Embperl.so
#11 0xf7dc26be in XS_Embperl__Req_execute_component () from
/home/carl/projects/GOB/third-party/perl/lib/5.8.7/i686-linux/auto/Embperl/Embperl.so
#12 0xf7eac35e in Perl_pp_entersub () from
/home/carl/projects/GOB/third-party/apache/modules/mod_perl.so
#13 0xf7eaaead in Perl_runops_standard () from
/home/carl/projects/GOB/third-party/apache/modules/mod_perl.so
#14 0xf7e5e62b in S_call_body () from
/home/carl/projects/GOB/third-party/apache/modules/mod_perl.so
#15 0xf7e5f175 in Perl_call_sv () from
/home/carl/projects/GOB/third-party/apache/modules/mod_perl.so
#16 0xf7d8ac24 in EMBPERL2_CallStoredCV () from
/home/carl/projects/GOB/third-party/perl/lib/5.8.7/i686-linux/auto/Embperl/Embperl.so
#17 0xf7da0000 in embperl_Execute () from
/home/carl/projects/GOB/third-party/perl/lib/5.8.7/i686-linux/auto/Embperl/Embperl.so
#18 0xf7da59b9 in ProviderEpRun_GetContentIndex () from
/home/carl/projects/GOB/third-party/perl/lib/5.8.7/i686-linux/auto/Embperl/Embperl.so
#19 0xf7da4300 in Cache_GetContentIndex () from
/home/carl/projects/GOB/third-party/perl/lib/5.8.7/i686-linux/auto/Embperl/Embperl.so
#20 0xf7d8558b in ProcessFile () from
/home/carl/projects/GOB/third-party/perl/lib/5.8.7/i686-linux/auto/Embperl/Embperl.so
#21 0xf7d860df in embperl_RunRequest () from
/home/carl/projects/GOB/third-party/perl/lib/5.8.7/i686-linux/auto/Embperl/Embperl.so
#22 0xf7dc23f4 in XS_Embperl__Req_run () from
/home/carl/projects/GOB/third-party/perl/lib/5.8.7/i686-linux/auto/Embperl/Embperl.so
#23 0xf7eac35e in Perl_pp_entersub () from
/home/carl/projects/GOB/third-party/apache/modules/mod_perl.so
#24 0xf7eaaead in Perl_runops_standard () from
/home/carl/projects/GOB/third-party/apache/modules/mod_perl.so
#25 0xf7e5e62b in S_call_body () from
/home/carl/projects/GOB/third-party/apache/modules/mod_perl.so
#26 0xf7e5f175 in Perl_call_sv () from
/home/carl/projects/GOB/third-party/apache/modules/mod_perl.so
#27 0xf7e4b984 in modperl_callback () from
/home/carl/projects/GOB/third-party/apache/modules/mod_perl.so
#28 0xf7e4bd6c in modperl_callback_run_handlers () from
/home/carl/projects/GOB/third-party/apache/modules/mod_perl.so
#29 0xf7e4c112 in modperl_callback_per_dir () from
/home/carl/projects/GOB/third-party/apache/modules/mod_perl.so
#30 0xf7e482ad in modperl_response_handler_run () from
/home/carl/projects/GOB/third-party/apache/modules/mod_perl.so
#31 0xf7e4842a in modperl_response_handler_cgi () from
/home/carl/projects/GOB/third-party/apache/modules/mod_perl.so
#32 0x080673db in ap_run_handler (r=0x8571550) at config.c:152
#33 0x08069d85 in ap_invoke_handler (r=0x8571550) at config.c:364
#34 0x080655df in ap_process_request (r=0x8571550) at http_request.c:249
#35 0x08060e6c in ap_process_http_connection (c=0x857b660) at http_core.c:251
#36 0x0807013b in ap_run_process_connection (c=0x857b660) at connection.c:43
#37 0x080664e8 in child_main (child_num_arg=Variable "child_num_arg" is not
available.
) at prefork.c:610
#38 0x08066671 in make_child (s=Variable "s" is not available.
) at prefork.c:704
#39 0x08066701 in startup_children (number_to_start=2) at prefork.c:722
#40 0x08066dcd in ap_mpm_run (_pconf=0x809c0a8, plog=0x80c6150, s=0x809de58) at
prefork.c:941
#41 0x0806be4a in main (argc=3, argv=0xffffc3a4) at main.c:618
(gdb)
Index: mod_embperl.c
===================================================================
--- mod_embperl.c (revision 355598)
+++ mod_embperl.c (working copy)
@@ -953,10 +953,11 @@
ap_log_error (APLOG_MARK, APLOG_WARNING | APLOG_NOERRNO,
APLOG_STATUSCODE NULL, "EmbperlDebug: Get: about to convert "#CFGNAME"
(type="#TYPE";CV) to perl data: %s\n", pDirCfg -> save_##STRUCT##NAME) ; \
\
if ((rc = EvalConfig (pApp, sv_2mortal(newSVpv(pDirCfg ->
save_##STRUCT##NAME, 0)), 0, NULL, "Configuration: EMBPERL_"#CFGNAME, &pDirCfg
-> STRUCT.NAME)) != ok) \
- LogError (pReq, rc) ; \
- return rc ; \
+ pDirCfg -> STRUCT.NAME = NULL ; \
+ tainted = 0 ; \
} \
- SvREFCNT_inc((SV *)(pDirCfg -> STRUCT.NAME)) ;
+ if (pDirCfg -> STRUCT.NAME) \
+ SvREFCNT_inc((SV *)(pDirCfg -> STRUCT.NAME)) ;
#undef EPCFG_AV
@@ -994,10 +995,11 @@
ap_log_error (APLOG_MARK, APLOG_WARNING | APLOG_NOERRNO,
APLOG_STATUSCODE NULL, "EmbperlDebug: Get: about to convert "#CFGNAME"
(type="#TYPE";REGEX) to perl data: %s\n", pDirCfg -> save_##STRUCT##NAME) ; \
\
if ((rc = EvalRegEx (pApp, pDirCfg -> save_##STRUCT##NAME,
"Configuration: EMBPERL_"#CFGNAME, &pDirCfg -> STRUCT.NAME)) != ok) \
- return rc ; \
+ pDirCfg -> STRUCT.NAME = NULL ; \
tainted = 0 ; \
} \
- SvREFCNT_inc((SV *)(pDirCfg -> STRUCT.NAME)) ;
+ if (pDirCfg -> STRUCT.NAME) \
+ SvREFCNT_inc((SV *)(pDirCfg -> STRUCT.NAME)) ;
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