I'm working on a C program that uses libnss to update certificates in a
mod_nss database. Using valgrind to check for memory leaks, and I am
seeing 8 blocks that are still in use when the program exits, all of
which were apparently allocated by NSS_InitReadWrite().
==6798== HEAP SUMMARY:
==6798== in use at exit: 1,382 bytes in 8 blocks
==6798== total heap usage: 1,777 allocs, 1,769 frees, 565,345 bytes allocated
==6798==
==6798== 6 bytes in 1 blocks are still reachable in loss record 1 of 8
==6798== at 0x4C2DB9D: malloc (vg_replace_malloc.c:299)
==6798== by 0x5075B33: _PR_InitLinker (prlink.c:192)
==6798== by 0x507BCE2: _PR_InitStuff (prinit.c:206)
==6798== by 0x507C491: _PR_ImplicitInitialization (prinit.c:219)
==6798== by 0x507C491: PR_CallOnce (prinit.c:774)
==6798== by 0x54BED76: nss_Init (nssinit.c:580)
==6798== by 0x54BFC18: NSS_InitReadWrite (nssinit.c:832)
==6798== by 0x404828: init_libnss (umn.c:1191)
==6798== by 0x40552C: main (umn.c:1424)
==6798==
==6798== 24 bytes in 1 blocks are still reachable in loss record 2 of 8
==6798== at 0x4C2DB9D: malloc (vg_replace_malloc.c:299)
==6798== by 0x507BAB2: PR_ErrorInstallTable (prerrortable.c:169)
==6798== by 0x507BD11: _PR_InitStuff (prinit.c:212)
==6798== by 0x507C491: _PR_ImplicitInitialization (prinit.c:219)
==6798== by 0x507C491: PR_CallOnce (prinit.c:774)
==6798== by 0x54BED76: nss_Init (nssinit.c:580)
==6798== by 0x54BFC18: NSS_InitReadWrite (nssinit.c:832)
==6798== by 0x404828: init_libnss (umn.c:1191)
==6798== by 0x40552C: main (umn.c:1424)
==6798==
==6798== 24 bytes in 1 blocks are still reachable in loss record 3 of 8
==6798== at 0x4C2DB9D: malloc (vg_replace_malloc.c:299)
==6798== by 0x507BAB2: PR_ErrorInstallTable (prerrortable.c:169)
==6798== by 0x507C4A1: PR_CallOnce (prinit.c:778)
==6798== by 0x66678D6: NSS_InitializePRErrorTable (errstrs.c:38)
==6798== by 0x54BF10B: nss_InitModules (nssinit.c:380)
==6798== by 0x54BF10B: nss_Init (nssinit.c:689)
==6798== by 0x54BFC18: NSS_InitReadWrite (nssinit.c:832)
==6798== by 0x404828: init_libnss (umn.c:1191)
==6798== by 0x40552C: main (umn.c:1424)
==6798==
==6798== 32 bytes in 1 blocks are still reachable in loss record 4 of 8
==6798== at 0x4C2FA50: calloc (vg_replace_malloc.c:711)
==6798== by 0x603066E: _dlerror_run (dlerror.c:141)
==6798== by 0x602FFA1: dlopen@@GLIBC_2.2.5 (dlopen.c:87)
==6798== by 0x5076903: pr_FindSymbolInProg (prmem.c:98)
==6798== by 0x5076903: _PR_InitZones (prmem.c:154)
==6798== by 0x507BBA2: _PR_InitStuff (prinit.c:144)
==6798== by 0x507C491: _PR_ImplicitInitialization (prinit.c:219)
==6798== by 0x507C491: PR_CallOnce (prinit.c:774)
==6798== by 0x54BED76: nss_Init (nssinit.c:580)
==6798== by 0x54BFC18: NSS_InitReadWrite (nssinit.c:832)
==6798== by 0x404828: init_libnss (umn.c:1191)
==6798== by 0x40552C: main (umn.c:1424)
==6798==
==6798== 40 bytes in 1 blocks are still reachable in loss record 5 of 8
==6798== at 0x4C2FA50: calloc (vg_replace_malloc.c:711)
==6798== by 0x5075B21: _PR_InitLinker (prlink.c:190)
==6798== by 0x507BCE2: _PR_InitStuff (prinit.c:206)
==6798== by 0x507C491: _PR_ImplicitInitialization (prinit.c:219)
==6798== by 0x507C491: PR_CallOnce (prinit.c:774)
==6798== by 0x54BED76: nss_Init (nssinit.c:580)
==6798== by 0x54BFC18: NSS_InitReadWrite (nssinit.c:832)
==6798== by 0x404828: init_libnss (umn.c:1191)
==6798== by 0x40552C: main (umn.c:1424)
==6798==
==6798== 64 bytes in 1 blocks are still reachable in loss record 6 of 8
==6798== at 0x4C2DB9D: malloc (vg_replace_malloc.c:299)
==6798== by 0x50849B2: PR_NewCondVar (ptsynch.c:321)
==6798== by 0x54BE61C: nss_doLockInit (nssinit.c:539)
==6798== by 0x507C4A1: PR_CallOnce (prinit.c:778)
==6798== by 0x54BED76: nss_Init (nssinit.c:580)
==6798== by 0x54BFC18: NSS_InitReadWrite (nssinit.c:832)
==6798== by 0x404828: init_libnss (umn.c:1191)
==6798== by 0x40552C: main (umn.c:1424)
==6798==
==6798== 168 bytes in 1 blocks are still reachable in loss record 7 of 8
==6798== at 0x4C2FA50: calloc (vg_replace_malloc.c:711)
==6798== by 0x508490C: PR_NewLock (ptsynch.c:142)
==6798== by 0x54BE608: nss_doLockInit (nssinit.c:535)
==6798== by 0x507C4A1: PR_CallOnce (prinit.c:778)
==6798== by 0x54BED76: nss_Init (nssinit.c:580)
==6798== by 0x54BFC18: NSS_InitReadWrite (nssinit.c:832)
==6798== by 0x404828: init_libnss (umn.c:1191)
==6798== by 0x40552C: main (umn.c:1424)
==6798==
==6798== 1,024 bytes in 1 blocks are still reachable in loss record 8 of 8
==6798== at 0x4C2FA50: calloc (vg_replace_malloc.c:711)
==6798== by 0x5075702: _PR_InitTPD (prtpd.c:65)
==6798== by 0x507BC96: _PR_InitStuff (prinit.c:172)
==6798== by 0x507C491: _PR_ImplicitInitialization (prinit.c:219)
==6798== by 0x507C491: PR_CallOnce (prinit.c:774)
==6798== by 0x54BED76: nss_Init (nssinit.c:580)
==6798== by 0x54BFC18: NSS_InitReadWrite (nssinit.c:832)
==6798== by 0x404828: init_libnss (umn.c:1191)
==6798== by 0x40552C: main (umn.c:1424)
==6798==
==6798== LEAK SUMMARY:
==6798== definitely lost: 0 bytes in 0 blocks
==6798== indirectly lost: 0 bytes in 0 blocks
==6798== possibly lost: 0 bytes in 0 blocks
==6798== still reachable: 1,382 bytes in 8 blocks
==6798== suppressed: 0 bytes in 0 blocks
I am currently calling NSS_Shutdown(), PL_ArenaFinish(), and
PR_Cleanup() during program shutdown.
Is there anything else I should be doing to clean up?
--
========================================================================
Ian Pilcher arequip...@gmail.com
-------- "I grew up before Mark Zuckerberg invented friendship" --------
========================================================================
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