[freetds] Help me. About dbproc's memory leak

ldai ldai at accunettech.com
Fri Aug 27 04:48:07 EDT 2004


On Fri, 27 Aug 2004 15:52:41 +0800, ldai wrote
> Hi,everybody:
>      My test env is freetds-0.62.4+dblib+c+sqlserver+linux 9.
>      When I traced problem about core dump, I found a memory leak.
>      I am just to do connection and relase action in our test code. 
> When I can't success in connecting database, the (DBPROCESS *)dbproc 
> return NULL. I can't use dbclose to clear this structure. If you do 
> dbclose(dbproc),you will get a error :Segmentation fault (core 
> dumped). When I use top command to check memory, I found the memory 
> leak very fast.   Could you tell me how to close dbproc when it is NULL?
>   Or give me some advices.
>   Thank you very much.
>                               ldai
>                           27,Aug,2004
> _______________________________________________
> FreeTDS mailing list
> FreeTDS at lists.ibiblio.org
> http://lists.ibiblio.org/mailman/listinfo/freetds

This is report which is created by dmalloc tools:
1093594930: 201: Dmalloc version '5.3.0' from 'http://dmalloc.com/'
1093594930: 201: flags = 0x4f4e503, logfile '/tmp/leon_log.txt'
1093594930: 201: interval = 100, addr = 0, seen # = 0, limit = 0
1093594930: 201: starting time = 1093594930
1093594930: 201: process pid = 6747
1093595730: 1150101:  total-size  count  source
1093595730: 1150101:    15840000  10000  ra=0x8050e7b
1093595730: 1150101:     2480000  10000  ra=0x8050f78
1093595730: 1150101:      720000  60000  ra=0x8050d00
1093595730: 1150101:       70000  60000  ra=0x8050d27
1093595730: 1150101:        2317      4  ra=0x40009473
1093595730: 1150101:         688     18  ra=0x420ef422
1093595730: 1150101:         544      4  ra=0x4000d036
1093595730: 1150101:         242     15  ra=0x420ef984
1093595730: 1150101:         124      1  ra=0x42097c78
1093595730: 1150101:          92      4  ra=0x4000968e
1093595730: 1150101:          92      3  ra=0x4000b246
1093595730: 1150101:          64      3  ra=0x40004aeb
1093595730: 1150101:          64      4  ra=0x420dc3cc
1093595730: 1150101:          52      1  ra=0x4201e1ea
1093595730: 1150101:          49      4  ra=0x420968fa
1093595730: 1150101:          28      1  ra=0x40072f4c
1093595730: 1150101:          28      1  ra=0x40004869
1093595730: 1150101:          24      2  ra=0x420efa5d
1093595730: 1150101:          24      3  ra=0x420ef06c
1093595730: 1150101:          20      1  ra=0x4000b158
1093595730: 1150101:          15      1  ra=0x4207a1a0
1093595730: 1150101:           8      1  ra=0x420ef27e
1093595730: 1150101:    19114475 140071  Total of 22
1093595730: 1150101: ending time = 1093595730, elapsed since start = 0:13:20


[root at nipsvr4 ms_infc_freetds]# gdb ms_sql
GNU gdb Red Hat Linux (5.3post-0.20021129.18rh)
Copyright 2003 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 "i386-redhat-linux-gnu"...
(gdb) x 0x8050e7b
0x8050e7b <init_dboptions+19>:  0x8510c483
(gdb) x 0x8050f78
0x8050f78 <tdsdbopen+24>:       0x8510c483
(gdb) x 0x8050d00
0x8050d00 <dbstring_concat+40>: 0x8510c483
(gdb) x 0x8050d27
0x8050d27 <dbstring_concat+79>: 0x8510c483
(gdb)


Please help me!

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