[rrd-developers] MRTG , Segmentation Fault , After re-installing perl .
kevin brintnall
kbrint at rufus.net
Mon Apr 6 17:04:50 CEST 2009
On Wed, Apr 01, 2009 at 11:01:24AM -0800, Mr. James W. Laferriere wrote:
> Hello Kevin ,
Hi James, forgive my late reply.. I am out on holiday.
> There are two places in the make process that that file is compiled or
> built , They're in the attached file , make-rrdtool-1_3_6.rrd_update_c.log .
> I also have a full make log capture if you ever need that .
These do look good.. -g and no -O. However, based on the backtrace it
does look like the call to write_RRA_row() is still being optimized out.
Does your build environment contain any other things that would turn on
optimization? i.e. $CFLAGS in the environment or in the default make
settings?
Send me the full log off-list.
> > It will be very helpful to see the ds_idx value; I suspect it's this
> > pointer de-reference that's causing the SIGSEGV, because all the other
> > pointers look correct: rrd->ds_def[ds_idx].ds_nam
>
> See attached , rrdtool-segfault-20090401.log .
Your debug commands:
(gdb) p rrd->stat_head->ds_cnt
No symbol "rrd" in current context.
(gdb) p rrd->stat_head
No symbol "rrd" in current context.
(gdb) p rrd->ds_def[ds_idx].ds_nam
No symbol "rrd" in current context.
(gdb) exit
Undefined command: "exit". Try "help".
...are not useful since they are in the wrong stack frame. You need to
use "(gdb) select 4" to examine this frame. It would be helpful if you
could retry.
#4 0xb7cc1193 in write_to_rras (rrd=0xbff20944, rrd_file=0x897b658, rra_step_cnt=<value optimized out>, rra_begin=2760,
current_time=1238611056, skip_update=0x89cdfb0, pcdp_summary=0xbff209a0) at rrd_update.c:1944
Also, see Tobi's recent patch. This is the same part of code that is
giving you trouble.
https://lists.oetiker.ch/pipermail/rrd-developers/2009-April/003074.html
What are sizeof(time_t) and sizeof(long long) on your platform?
--
kevin brintnall =~ /kbrint at rufus.net/
>
> > This could also happen if your stat_head->ds_cnt is corrupted somehow.
> >
> > (gdb) p rrd->stat_head->ds_cnt
> > (gdb) p rrd->stat_head
>
> See attached , rrdtool-segfault-20090401.log .
>
> > Also, what happens if you run an equivalent 'rrdtool updatev' from the
> > command line?
>
> Don't know I'll try it (I hope I can build the proper command line) ,
> Hopefully this did not break anything ... But no error that I can see ,
> that is interesting ...
>
> # /usr/local/rrdtool/bin/rrdtool updatev /var/www/htdocs/router2cgi/graphs/to-rtr01/to-rtr01_1.rrd -t ds0:ds1 `date "+%s"`:4942:3254
> return_value = 0
> #
> # /usr/local/rrdtool/bin/rrdtool -V
> RRDtool 1.3.6 Copyright 1997-2008 by Tobias Oetiker <tobi at oetiker.ch>
> Compiled Feb 6 2009 09:28:18
> ...snip...
>
> --
> +------------------------------------------------------------------+
> | James W. Laferriere | System Techniques | Give me VMS |
> | Network&System Engineer | 2133 McCullam Ave | Give me Linux |
> | babydr at baby-dragons.com | Fairbanks, AK. 99701 | only on AXP |
> +------------------------------------------------------------------+
> [?1034hGNU gdb 6.6
> Copyright (C) 2006 Free Software Foundation, Inc.
> GDB is free software, covered by the GNU General Public License, and you are
> welcome to change it and/or distribute copies of it under certain conditions.
> Type "show copying" to see the conditions.
> There is absolutely no warranty for GDB. Type "show warranty" for details.
> This GDB was configured as "i486-slackware-linux"...
> Using host libthread_db library "/lib/libthread_db.so.1".
> (gdb) set args /usr/local/mrtg-2/bin/mrtg-ORIG /var/www/htdocs/router2cgi/cfg/to-rtr01.cfg
> (gdb) run
> Starting program: /usr/local/bin/perl /usr/local/mrtg-2/bin/mrtg-ORIG /var/www/htdocs/router2cgi/cfg/to-rtr01.cfg
> [Thread debugging using libthread_db enabled]
> [New Thread -1210906944 (LWP 4125)]
> Error while reading shared library symbols:
> Cannot find new threads: generic error
>
> Program received signal SIGSEGV, Segmentation fault.
> [Switching to Thread -1210906944 (LWP 4125)]
> 0xb7d9f22b in strlen () from /lib/libc.so.6
> (gdb) bt
> #0 0xb7d9f22b in strlen () from /lib/libc.so.6
> #1 0xb7d71281 in vfprintf () from /lib/libc.so.6
> #2 0xb7d8fd91 in vsnprintf () from /lib/libc.so.6
> #3 0xb7cbc2ac in sprintf_alloc (fmt=0xb7cc85c2 "[%lli]RRA[%s][%lu]DS[%s]") at rrd_info.c:34
> #4 0xb7cc1193 in write_to_rras (rrd=0xbff20944, rrd_file=0x897b658, rra_step_cnt=<value optimized out>, rra_begin=2760,
> current_time=1238611056, skip_update=0x89cdfb0, pcdp_summary=0xbff209a0) at rrd_update.c:1944
> #5 0xb7cc1d1f in process_arg (step_start=0x8980460 "1238611056", rrd=0xbff20944, rrd_file=0x897b658, rra_begin=81864,
> current_time=0xbff20978, current_time_usec=0xbff20974, pdp_temp=0x89cdf98, pdp_new=0x897b280, rra_step_cnt=0x897b258,
> updvals=0x88878f0, tmpl_idx=0x8888fc0, tmpl_cnt=3, pcdp_summary=0xbff209a0, version=3, skip_update=0x89cdfb0,
> schedule_smooth=0xbff20970) at rrd_update.c:819
> #6 0xb7cc2e8a in _rrd_update (filename=0x89ce000 "/var/www/htdocs/router2cgi/graphs/to-rtr01/to-rtr01_1.rrd", tmplt=0x0, argc=1,
> argv=0x885f7c0, pcdp_summary=0x88795e0) at rrd_update.c:497
> #7 0xb7cc34a1 in rrd_update_v (argc=2, argv=0x885f7b8) at rrd_update.c:362
> #8 0xb7cd00cf in XS_RRDs_updatev () from /usr/local/lib/perl5/site_perl/5.10.0/i686-linux//auto/RRDs/RRDs.so
> #9 0x0809ed60 in Perl_pp_entersub ()
> #10 0x0809d638 in Perl_runops_standard ()
> #11 0x08099fa4 in perl_run ()
> #12 0x0805ed7f in main ()
> (gdb) p rrd->stat_head->ds_cnt
> No symbol "rrd" in current context.
> (gdb) p rrd->stat_head
> No symbol "rrd" in current context.
> (gdb) p rrd->ds_def[ds_idx].ds_nam
> No symbol "rrd" in current context.
> (gdb) exit
> Undefined command: "exit". Try "help".
> (gdb) quit
> The program is running. Exit anyway? (y or n)
> if /bin/sh ../libtool --tag=CC --mode=compile gcc -DHAVE_CONFIG_H -I. -I. -I.. -DLOCALEDIR="\"/usr/local/rrdtool-1.3.6/share/locale\"" -DRRD_DEFAULT_FONT=\""DejaVu Sans Mono,Bitstream Vera Sans Mono,monospace,Courier"\" -DNUMVERS=1.3006 -I/usr/include/cairo -I/usr/include/libpng12 -I/usr/include/freetype2 -I/usr/include/pango-1.0 -I/usr/include/cairo -I/usr/include/glib-2.0 -I/usr/lib/glib-2.0/include -I/usr/include/freetype2 -I/usr/include/libpng12 -I/usr/include/libxml2 -g -D_GNU_SOURCE -fno-strict-aliasing -Wall -std=c99 -pedantic -Wundef -Wshadow -Wpointer-arith -Wcast-align -Wmissing-prototypes -Wmissing-declarations -Wnested-externs -Winline -Wold-style-definition -W -fPIC -DPIC -MT rrd_update.lo -MD -MP -MF ".deps/rrd_update.Tpo" -c -o rrd_update.lo rrd_update.c; \
>
> gcc -DHAVE_CONFIG_H -I. -I. -I.. -DLOCALEDIR=\"/usr/local/rrdtool-1.3.6/share/locale\" "-DRRD_DEFAULT_FONT=\"DejaVu Sans Mono,Bitstream Vera Sans Mono,monospace,Courier\"" -DNUMVERS=1.3006 -I/usr/include/cairo -I/usr/include/libpng12 -I/usr/include/freetype2 -I/usr/include/pango-1.0 -I/usr/include/cairo -I/usr/include/glib-2.0 -I/usr/lib/glib-2.0/include -I/usr/include/freetype2 -I/usr/include/libpng12 -I/usr/include/libxml2 -g -D_GNU_SOURCE -fno-strict-aliasing -Wall -std=c99 -pedantic -Wundef -Wshadow -Wpointer-arith -Wcast-align -Wmissing-prototypes -Wmissing-declarations -Wnested-externs -Winline -Wold-style-definition -W -fPIC -DPIC -MT rrd_update.lo -MD -MP -MF .deps/rrd_update.Tpo -c rrd_update.c -fPIC -DPIC -o .libs/rrd_update.o
>
> gcc -DHAVE_CONFIG_H -I. -I. -I.. -DLOCALEDIR=\"/usr/local/rrdtool-1.3.6/share/locale\" "-DRRD_DEFAULT_FONT=\"DejaVu Sans Mono,Bitstream Vera Sans Mono,monospace,Courier\"" -DNUMVERS=1.3006 -I/usr/include/cairo -I/usr/include/libpng12 -I/usr/include/freetype2 -I/usr/include/pango-1.0 -I/usr/include/cairo -I/usr/include/glib-2.0 -I/usr/lib/glib-2.0/include -I/usr/include/freetype2 -I/usr/include/libpng12 -I/usr/include/libxml2 -g -D_GNU_SOURCE -fno-strict-aliasing -Wall -std=c99 -pedantic -Wundef -Wshadow -Wpointer-arith -Wcast-align -Wmissing-prototypes -Wmissing-declarations -Wnested-externs -Winline -Wold-style-definition -W -fPIC -DPIC -MT rrd_update.lo -MD -MP -MF .deps/rrd_update.Tpo -c rrd_update.c -o rrd_update.o >/dev/null 2>&1
>
>
> if /bin/sh ../libtool --tag=CC --mode=compile gcc -DHAVE_CONFIG_H -I. -I. -I.. -DLOCALEDIR="\"/usr/local/rrdtool-1.3.6/share/locale\"" -DRRD_DEFAULT_FONT=\""DejaVu Sans Mono,Bitstream Vera Sans Mono,monospace,Courier"\" -DNUMVERS=1.3006 -I/usr/include/cairo -I/usr/include/libpng12 -I/usr/include/freetype2 -I/usr/include/pango-1.0 -I/usr/include/cairo -I/usr/include/glib-2.0 -I/usr/lib/glib-2.0/include -I/usr/include/freetype2 -I/usr/include/libpng12 -I/usr/include/libxml2 -pthread -g -D_GNU_SOURCE -fno-strict-aliasing -Wall -std=c99 -pedantic -Wundef -Wshadow -Wpointer-arith -Wcast-align -Wmissing-prototypes -Wmissing-declarations -Wnested-externs -Winline -Wold-style-definition -W -fPIC -DPIC -MT librrd_th_la-rrd_update.lo -MD -MP -MF ".deps/librrd_th_la-rrd_update.Tpo" -c -o librrd_th_la-rrd_update.lo `test -f 'rrd_update.c' || echo './'`rrd_update.c; \
>
> gcc -DHAVE_CONFIG_H -I. -I. -I.. -DLOCALEDIR=\"/usr/local/rrdtool-1.3.6/share/locale\" "-DRRD_DEFAULT_FONT=\"DejaVu Sans Mono,Bitstream Vera Sans Mono,monospace,Courier\"" -DNUMVERS=1.3006 -I/usr/include/cairo -I/usr/include/libpng12 -I/usr/include/freetype2 -I/usr/include/pango-1.0 -I/usr/include/cairo -I/usr/include/glib-2.0 -I/usr/lib/glib-2.0/include -I/usr/include/freetype2 -I/usr/include/libpng12 -I/usr/include/libxml2 -pthread -g -D_GNU_SOURCE -fno-strict-aliasing -Wall -std=c99 -pedantic -Wundef -Wshadow -Wpointer-arith -Wcast-align -Wmissing-prototypes -Wmissing-declarations -Wnested-externs -Winline -Wold-style-definition -W -fPIC -DPIC -MT librrd_th_la-rrd_update.lo -MD -MP -MF .deps/librrd_th_la-rrd_update.Tpo -c rrd_update.c -fPIC -DPIC -o .libs/librrd_th_la-rrd_update.o
>
> gcc -DHAVE_CONFIG_H -I. -I. -I.. -DLOCALEDIR=\"/usr/local/rrdtool-1.3.6/share/locale\" "-DRRD_DEFAULT_FONT=\"DejaVu Sans Mono,Bitstream Vera Sans Mono,monospace,Courier\"" -DNUMVERS=1.3006 -I/usr/include/cairo -I/usr/include/libpng12 -I/usr/include/freetype2 -I/usr/include/pango-1.0 -I/usr/include/cairo -I/usr/include/glib-2.0 -I/usr/lib/glib-2.0/include -I/usr/include/freetype2 -I/usr/include/libpng12 -I/usr/include/libxml2 -pthread -g -D_GNU_SOURCE -fno-strict-aliasing -Wall -std=c99 -pedantic -Wundef -Wshadow -Wpointer-arith -Wcast-align -Wmissing-prototypes -Wmissing-declarations -Wnested-externs -Winline -Wold-style-definition -W -fPIC -DPIC -MT librrd_th_la-rrd_update.lo -MD -MP -MF .deps/librrd_th_la-rrd_update.Tpo -c rrd_update.c -o librrd_th_la-rrd_update.o >/dev/null 2>&1
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