Cannot view trends

[Hendrik BŠäcker]

Hi List,

I've spent some time with the gdb too.
> Running trends.cgi in gdb, it apparently fails at this point:
>
> <snip>
> ~                 printf("</table>\n");
> ~                 }
>
> #ifndef DEBUG
> ~         /* check authorization... */
> ~         if(display_type==DISPLAY_HOST_TRENDS){
> ~                 temp_host=find_host(host_name);  // fail here!!!
> <snip>
>
> because the call to find_host() returns NULL.  Again, running the other scripts
> from the command line, with the same host entry, *does* work fine.
>   
That's true. find_host() returns NULL cause skiplist_find_first() 
returns NULL behind.

I am not familar with the new skiplist logic, so perhaps someone else 
can make a review of that gdb run.

########
Breakpoint 1, find_host (name=0x807d008 "localhost") at 
../common/objects.c:2746
2746    host * find_host(char *name){
(gdb) s
2748
2749            if(name==NULL)
2751
2752            temp_host.name=name;
2753
2754            return 
skiplist_find_first(object_skiplists[HOST_SKIPLIST],&temp_host,NULL);
(gdb)
skiplist_find_first (list=0x807dba0, data=0xbfe52ad8, node_ptr=0x0) at 
../common/skiplist.c:336
336             skiplistnode *thisnode=NULL;
337             skiplistnode *nextnode=NULL;
338             int level=0;
340             if(list==NULL || data==NULL)
343             thisnode=list->head;
344             for(level=list->current_level;level>=0;level--){
345                     while((nextnode=thisnode->forward[level])){

### At this point 'level' is '0'
### Don't know what should happen with 'nextmode' but it results in NULL

344             for(level=list->current_level;level>=0;level--){
### 'level' is decrementet so actual '-1'

353             if(nextnode && 
list->compare_function(nextnode->data,data)==0){
### not true cause nextmode is null - I think

359                     if(node_ptr)
363             return NULL;
(gdb) bt full
#0  skiplist_find_first (list=0x807dba0, data=0xbfe52ad8, node_ptr=0x0) 
at ../common/skiplist.c:363
        thisnode = (skiplistnode *) 0x807ecc0
        nextnode = (skiplistnode *) 0x0
        level = -1
#1  0x0805ac86 in find_host (name=0x807d008 "localhost") at 
../common/objects.c:2754
        temp_host = {name = 0x807d008 "localhost", display_name = 
0x807fd3c "CEST", alias = 0xb7eb59c0 "", address = 0x0, parent_hosts = 
0x0, child_hosts = 0x0, services = 0x3637,
<cutted useless data>  nexthash = 0x47e4349c}
#2  0x0804a935 in main () at trends.c:561
        result = 0
        temp_buffer = "Host State Trends\000ٷ�7���������\035��ѷ\001", 
'\0' <repeats 15 times>, "�忳\216�\225��\000����\006", '\0' <repeats 11 
times>, ",\227�000\000\000\000K
<cutted useless data>
        end_time = '\0' <repeats 1023 times>
        string_width = -1209311244
        string_height = -1075493448
        start_timestring = "03-21-2008 23:20:12", '\0' <repeats 1004 times>
        end_timestring = "03-22-2008 23:20:12", '\0' <repeats 1004 times>
        temp_host = (host *) 0x80494a0
        temp_service = (service *) 0xb7eb5ff4
        is_authorized = 1
        found = 0
        days = 1
        hours = 0
        minutes = 0
        seconds = 0
        first_service = 0x0
        t3 = -1208422412
        current_time = 1206224412
        t = (struct tm *) 0xb7f77ab0
   
########

Regards
Hendrik

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