Robert,
thank you for the patch, but unfortunately it didn't work (I applied it against 5.1.2).
Valgrind is still complaining about the invalid free():
==32669== Invalid free() / delete / delete[] ==32669== at 0x1B902460: free (vg_replace_malloc.c:153) ==32669== by 0x1BBABF2F: clear_callback (callback.c:380) ==32669== by 0x1BB7FEC6: snmp_shutdown (snmp_api.c:848) ==32669== by 0x8051BC7: snmpAgentThread (snmp.c:1086) ==32669== Address 0x1BE9B498 is 0 bytes inside a block of size 220 free'd ==32669== at 0x1B902460: free (vg_replace_malloc.c:153) ==32669== by 0x1BB8191C: snmp_free_session (snmp_api.c:1693) ==32669== by 0x1BB81AF4: snmp_sess_close (snmp_api.c:1773) ==32669== by 0x1BB81C72: snmp_close (snmp_api.c:1803) ==32669== by 0x1BA87174: subagent_shutdown (subagent.c:612) ==32669== by 0x1BBABA92: snmp_call_callbacks (callback.c:224) ==32669== by 0x1BB7FE99: snmp_shutdown (snmp_api.c:837) ==32669== by 0x8051BC7: snmpAgentThread (snmp.c:1086)
When I don't call snmp_shutdown() my application always works fine, but if I call it my application locks in random places after calling it. The only thing Valgrind is complaining is about the invalid free() in net-snmp.
Regards, Ivens
Robert Story (Coders) wrote:
On Wed, 20 Oct 2004 16:02:01 -0200 Ivens wrote:
IP> Robert Story (Coders) wrote:
IP> > On Tue, 19 Oct 2004 17:07:56 -0200 Ivens wrote:
IP> > IP> Robert Story (Coders) wrote:
IP> > IP> > On Tue, 19 Oct 2004 14:58:30 -0200 Ivens wrote:
IP> > IP> What if I shut everything down before restarting as an agent? Would IP> > IP> calling snmp_shutdown() solve the problem?
IP> > IP> > I was hoping you wouldn't ask that.
IP> > IP> > In theory, yes, that should work. However, since the agent exists when
IP> > shutting down, not a whole lot of work has gone into testing and working
IP> > out the kinks of snmp_shutdown. IP> IP> I didn't dig deep into the code but I ran my application on Valgrind to IP> try to detect memory problems and the only thing I got was an invalid IP> free() in snmp_shutdown(). Below is Valgrind output with the backtrace:
IP> IP> ==31937== Invalid free() / delete / delete[]
IP> ==31937== by 0x1BBABDC7: clear_callback (callback.c:297)
Try the patch I just attached to this bug report, and see if it helps:
http://sourceforge.net/tracker/index.php?func=detail&aid=1027711&group_id=12694&atid=112694
-- Ivens Porto OSE - Open Systems Engineering http://www.ose.com.br Phone: (55) 34 - 3214-5995 Fax: (55) 34 - 3214-5994 Cel: (55) 34 - 8816-9942
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