I have found a memory leak in the libpq library for postrgesql 7.4.3. The code sample in the attached file will produce the error.
I used Valgrind(http://valgrind.kde.org/) which is an open source memory profiler application in order to find the problem.
Machine: Pentium 4
OS: Linux Fedora Core1
According to Valgrind if an application attempts to make 2 or more connections to the database then memory will be lost for every connection except the first.
Here is the error that I see from Valgrind for 2 separate connections:
==8980== 56 bytes in 2 blocks are definitely lost in loss record 1 of 1
==8980== at 0x38E68E: malloc (vg_replace_malloc.c:153)
==8980== by 0x13DE9B: __libc_res_nsend (in /lib/libresolv-2.3.2.so)
==8980== by 0x13CC12: __libc_res_nquery (in /lib/libresolv-2.3.2.so)
==8980== by 0x13D309: __libc_res_nquerydomain (in /lib/libresolv-2.3.2.so)
==8980== by 0x13CF0F: __libc_res_nsearch (in /lib/libresolv-2.3.2.so)
==8980== by 0x37705D: ???
==8980== by 0x62AD25: gaih_inet (in /lib/libc-2.3.2.so)
==8980== by 0x62B923: __GI_getaddrinfo (in /lib/libc-2.3.2.so)
==8980== by 0xDF3661: getaddrinfo_all (in /usr/lib/libpq.so.3.1)
==8980== by 0xDE4EBB: (within /usr/lib/libpq.so.3.1)
==8980== by 0xDE4469: PQconnectStart (in /usr/lib/libpq.so.3.1)
==8980== by 0xDE43F1: PQconnectdb (in /usr/lib/libpq.so.3.1)
==8980== by 0x8048684: main (in /home/squin/yo)
==8980== by 0x579BBE: __libc_start_main (in /lib/libc-2.3.2.so)
==8980== by 0x804854C: (within /home/squin/yo)
Any help on this issue is greatly appreciated.
Thanks
Spencer Quin
Web Software Developer
Reseach In Motion
' (519) 888-7465 x2596
* squin@rim.com
