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Re: [reSIProcate] SipStack shutdown crash



Scott Godin wrote:


I don't see this problem, but if you can confirm that initializing the
variables fixes the problem for you and can provide a patch - then I can
commit a patch to SVN.



It is crashing at free(channel->lookups)

channel->lookups is a valid pointer to a string created by strdup

Maybe there is something odd about the way strdup gets heap space
Commenting out free(channel->lookups) eliminates the issue but causes memory leakage.
Is it likely that someone will be updating the entire contrib/ares tree before reSIProcate 1.0 comes out, or should we be looking at backporting fixes/patching the version of ares that is already present? 



Thanks,

Scott


-----Original Message-----
From: resiprocate-devel-bounces@xxxxxxxxxxxxxxxxxxx
[mailto:resiprocate-devel-bounces@xxxxxxxxxxxxxxxxxxx] On Behalf Of
Daniel Pocock
Sent: Thursday, September 07, 2006 11:59 AM
To: resiprocate-devel@xxxxxxxxxxxxxxxxxxx
Subject: Re: [reSIProcate] SipStack shutdown crash



Daniel Pocock wrote:


I've been evaluating some reSIProcate based code on the Windows

platform.

When I delete the SipStack object (after DUM is shutdown and deleted
properly), the Ares code complains about an invalid pointer.  This
always happens at the same place.

Note that this only seems to occur with the release version and not

the

debug build.



I notice in the more recent ares code that they initialise all the
pointers to NULL at init time:


http://cool.haxx.se/cvs.cgi/curl/ares/ares_init.c?rev=1.38&content-
type=text/vnd.viewcvs-markup

but the version of ares in reSIProcate doesn't have those changes.



Does anyone have any ideas?

        ntdll.dll!7c901230()



        ntdll.dll!7c96c943()
        ntdll.dll!7c96cd80()
        ntdll.dll!7c960af8()
        ntdll.dll!7c960bcc()
        kernel32.dll!7c85e9cf()
        msvcr71d.dll!_CrtIsValidHeapPointer(const void *
pUserData=0x007b5e30)  Line 1807        C
        msvcr71d.dll!_free_dbg_lk(void * pUserData=0x007b5e30, int
nBlockUse=0x00000001)  Line 1132 + 0x9  C
        msvcr71d.dll!_free_dbg(void * pUserData=0x007b5e30, int
nBlockUse=0x00000001)  Line 1070 + 0xd  C
        msvcr71d.dll!free(void * pUserData=0x007b5e30)  Line 1025 + 0xb

C

        gencc_sip.dll!_ares_destroy_internal()  + 0x69  C
        gencc_sip.dll!_ares_destroy_suppress_callbacks()  + 0xc C
        gencc_sip.dll!resip::AresDns::~AresDns()  Line 114 + 0xf
        gencc_sip.dll!resip::AresDns::`scalar deleting destructor'()  +
0x8
        gencc_sip.dll!resip::DnsStub::~DnsStub()  Line 76
        gencc_sip.dll!resip::DnsStub::`vector deleting destructor'()  +
0x8
        gencc_sip.dll!resip::SipStack::~SipStack()  + 0x98      C++
        gencc_sip.dll!resip::SipStack::`scalar deleting destructor'()  +
0x8     C++



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