[UDUNITS #JVV-494568]: memory leaks in udunits2

Peggy,

> There seems to be memory leak with ut_read_xml/ut_free_system. Or there
> shoud be a different way to release memory for ut_read_xml. I wonder if
> this is related to our already reported issue on May 1st, 2008 (UDUNITS
> #JFZ-220995) by Sue. I am using the current version (2.1.9). Here is my test
> code:
> 
> for(int loopi=0; loopi<100; loopi++) {
> ut_system* uds = ut_read_xml(NULL);
> sleep(1);
> ut_free_system(uds);
> uds = NULL;
> }
> 
> The memory usage increased:
> 
> VIRT: From 100MB to ~2.5GB
> RES: From 20MB to ~700MB
> 
> Please, give me some guidance of this memory leak issue.

Thanks for sending this in.

I'm investigating now.  This might take some time.

> Thanks!
> 
> Peggy
> 
> P.S.
> 
> Here is valgrind result with only one iteration:
> 
> ==1201== 27,512,628 (82,464 direct, 27,430,164 indirect) bytes in 1,718
> blocks are definitely lost in loss record 11 of 13
> ==1201==    at 0x401D38B: malloc (vg_replace_malloc.c:149)
> ==1201==    by 0x440D361: utalloc (in
> /d1/ncar/rapShared/apps/mdv_utils/src/NetCDF2Mdv/udunits/install/lib/libudunits2.so.0.0.0)
> ==1201==    by 0x440D7D5: ut_create_buffer (in
> /d1/ncar/rapShared/apps/mdv_utils/src/NetCDF2Mdv/udunits/install/lib/libudunits2.so.0.0.0)
> ==1201==    by 0x440D87F: utrestart (in
> /d1/ncar/rapShared/apps/mdv_utils/src/NetCDF2Mdv/udunits/install/lib/libudunits2.so.0.0.0)
> ==1201==    by 0x440FBD5: ut_parse (in
> /d1/ncar/rapShared/apps/mdv_utils/src/NetCDF2Mdv/udunits/install/lib/libudunits2.so.0.0.0)
> ==1201==    by 0x44119D1: mapIdToUnit (in
> /d1/ncar/rapShared/apps/mdv_utils/src/NetCDF2Mdv/udunits/install/lib/libudunits2.so.0.0.0)
> ==1201==    by 0x4411BE3: mapIdsToUnit (in
> /d1/ncar/rapShared/apps/mdv_utils/src/NetCDF2Mdv/udunits/install/lib/libudunits2.so.0.0.0)
> ==1201==    by 0x4411CAB: mapNamesToUnit (in
> /d1/ncar/rapShared/apps/mdv_utils/src/NetCDF2Mdv/udunits/install/lib/libudunits2.so.0.0.0)
> ==1201==    by 0x4412573: endElement (in
> /d1/ncar/rapShared/apps/mdv_utils/src/NetCDF2Mdv/udunits/install/lib/libudunits2.so.0.0.0)
> ==1201==    by 0x4418E62: doContent (in
> /d1/ncar/rapShared/apps/mdv_utils/src/NetCDF2Mdv/udunits/install/lib/libudunits2.so.0.0.0)
> ==1201==    by 0x4419729: contentProcessor (in
> /d1/ncar/rapShared/apps/mdv_utils/src/NetCDF2Mdv/udunits/install/lib/libudunits2.so.0.0.0)
> ==1201==    by 0x4419B49: prologProcessor (in
> /d1/ncar/rapShared/apps/mdv_utils/src/NetCDF2Mdv/udunits/install/lib/libudunits2.so.0.0.0)
> ==1201==
> ==1201==
> ==1201== 720,984 bytes in 44 blocks are possibly lost in loss record 12 of 13
> ==1201==    at 0x401D38B: malloc (vg_replace_malloc.c:149)
> ==1201==    by 0x440D361: utalloc (in
> /d1/ncar/rapShared/apps/mdv_utils/src/NetCDF2Mdv/udunits/install/lib/libudunits2.so.0.0.0)
> ==1201==    by 0x440D7F4: ut_create_buffer (in
> /d1/ncar/rapShared/apps/mdv_utils/src/NetCDF2Mdv/udunits/install/lib/libudunits2.so.0.0.0)
> ==1201==    by 0x440D87F: utrestart (in
> /d1/ncar/rapShared/apps/mdv_utils/src/NetCDF2Mdv/udunits/install/lib/libudunits2.so.0.0.0)
> ==1201==    by 0x440FBD5: ut_parse (in
> /d1/ncar/rapShared/apps/mdv_utils/src/NetCDF2Mdv/udunits/install/lib/libudunits2.so.0.0.0)
> ==1201==    by 0x44122A2: endElement (in
> /d1/ncar/rapShared/apps/mdv_utils/src/NetCDF2Mdv/udunits/install/lib/libudunits2.so.0.0.0)
> ==1201==    by 0x4418E62: doContent (in
> /d1/ncar/rapShared/apps/mdv_utils/src/NetCDF2Mdv/udunits/install/lib/libudunits2.so.0.0.0)
> ==1201==    by 0x4419729: contentProcessor (in
> /d1/ncar/rapShared/apps/mdv_utils/src/NetCDF2Mdv/udunits/install/lib/libudunits2.so.0.0.0)
> ==1201==    by 0x4419B49: prologProcessor (in
> /d1/ncar/rapShared/apps/mdv_utils/src/NetCDF2Mdv/udunits/install/lib/libudunits2.so.0.0.0)
> ==1201==    by 0x441AF34: prologInitProcessor (in
> /d1/ncar/rapShared/apps/mdv_utils/src/NetCDF2Mdv/udunits/install/lib/libudunits2.so.0.0.0)
> ==1201==    by 0x4413ADD: XML_ParseBuffer (in
> /d1/ncar/rapShared/apps/mdv_utils/src/NetCDF2Mdv/udunits/install/lib/libudunits2.so.0.0.0)
> ==1201==    by 0x44156F1: XML_Parse (in
> /d1/ncar/rapShared/apps/mdv_utils/src/NetCDF2Mdv/udunits/install/lib/libudunits2.so.0.0.0)
> ==1201==
> ==1201== LEAK SUMMARY:
> ==1201==    definitely lost: 82,464 bytes in 1,718 blocks.
> ==1201==    indirectly lost: 27,430,164 bytes in 1,674 blocks.
> ==1201==      possibly lost: 720,984 bytes in 44 blocks.
> ==1201==    still reachable: 3,826 bytes in 219 blocks.
> 
> Thanks!
> 
> Peiqi


Regards,
Steve Emmerson

Ticket Details
===================
Ticket ID: JVV-494568
Department: Support UDUNITS
Priority: Normal
Status: Open