[Perfparse-devel] Segmentation Fault et al

[Flo G. <fl...@bi...>]

Hi Developers

I have some problems to get perfparse generating graphs/charts. I use 
perfparse 0.100.1 and it nicely fills my mysql database but i cannot get a 
graph.

If i call perfchart.png or perfgant.png from the command line i get 
segmentation faults.

i could fix perfchart.c:

diff -C 3 perfchart.c ../../test/perfparse-0.100.1/cgi/perfchart.c
*** perfchart.c 2004-09-02 10:28:22.000000000 +0200
--- ../../test/perfparse-0.100.1/cgi/perfchart.c        2004-08-30 
22:27:54.000000000 +0200
***************
*** 374,382 ****
                 iValueCount++;
         }

!       if(data != NULL) {
!               data->next = NULL;
!       }

         #ifdef DEBUG
         fprintf(debug, "Count %d\n", iValueCount);
--- 374,380 ----
                 iValueCount++;
         }

!       data->next = NULL;

         #ifdef DEBUG
         fprintf(debug, "Count %d\n", iValueCount);





and here is a debugger session from perfgant.png:

(gdb) run
Starting program: /usr/local/nagios/sbin/perfgant.png
content-type: image/png


Program received signal SIGSEGV, Segmentation fault.
0x403793a6 in mallopt () from /lib/i686/libc.so.6
(gdb) bt
#0  0x403793a6 in mallopt () from /lib/i686/libc.so.6
#1  0x40378f05 in mallopt () from /lib/i686/libc.so.6
#2  0x40377cb8 in malloc () from /lib/i686/libc.so.6
#3  0x4039c5d2 in tzset () from /lib/i686/libc.so.6
#4  0x4039b34a in adjtime () from /lib/i686/libc.so.6
#5  0x4039bea6 in tzset () from /lib/i686/libc.so.6
#6  0x4039adf7 in timelocal () from /lib/i686/libc.so.6
#7  0x08049bee in getTime (sSQLDate=0x804cc38 "") at perfgant.c:476
#8  0x0804997d in getCGI () at perfgant.c:381
#9  0x08048e5b in main (argc=1, argv=0xbffff664) at perfgant.c:101
#10 0x4031bc57 in __libc_start_main () from /lib/i686/libc.so.6
(gdb)
(gdb) break 475
Breakpoint 1 at 0x8049be3: file perfgant.c, line 475.
(gdb) run
The program being debugged has been started already.
Start it from the beginning? (y or n) y

Starting program: /usr/local/nagios/sbin/perfgant.png
content-type: image/png


Breakpoint 1, getTime (sSQLDate=0x804cc38 "") at perfgant.c:476
476             tOut = mktime(&recTime);
(gdb) display recTime
1: recTime = {tm_sec = 0, tm_min = 0, tm_hour = 0, tm_mday = 0, tm_mon = 
-1,
   tm_year = -1900, tm_wday = -1073744456, tm_yday = 1077405158, tm_isdst = 
0,
   tm_gmtoff = 134521938, tm_zone = 0x1 <Address 0x1 out of bounds>}





Some other things i encountered during the attempt to install perfparse:

The HOWTO/INSTALL/README files did not say where the sql file is. A "find" 
pointed me to the right direction, but a line in the README would be 
great!

First, the cgi binaries did timeout and i had really problems to get some 
output at the browser. I straced the running cgi's and found out that they 
want to read/write to a temporary file or pipe. But this file is not 
generated by the executables or the "make install". Nothing in README as 
far as i can see. And no error message. I did created a file, but should 
it be a file or a pipe?

- xpdfile* configuration in nagios did not work for me, but you should 
note in README that it also works if you use

host_perfdata_command=process-host-perfdata
service_perfdata_command=process-service-perfdata

in nagios.cfg and
define command{
         command_name    process-host-perfdata
         command_line    /usr/bin/printf "%b" "$TIMET$\t$HOSTNAME$\t$OUTPUT$\t$PERFDATA$\n" >> /usr/local/nagios/var/host-perfdata.out
         }
define command{
         command_name    process-service-perfdata
         command_line    /usr/bin/printf "%b" "$TIMET$\t$HOSTNAME$\t$SERVICEDESC$\t$OUTPUT$\t$SERVICESTATE$\t$PERFDATA$\n" >> /usr/local/nagios/var/service-perfdata.out
         }

in misccommands.cfg

Last: some notes:

- Very cool feature. I want it!
- Why did you write it in C. Would'nt it be easier to use perl or php. 
Probably the perfparse should remain in C for speed purposes, but the web 
frontend would be more flexible in php.


Thank you,

Flo