Hi Anshuman, About first-chance exceptions, I don't think it means that there is any problem with the application, espesially if later you don't get any second chance exceptions. (Ref: http://blogs.msdn.com/b/davidklinems/archive/2005/07/12/438061.aspx Here's how to disable the FCE: http://www.helixoft.com/blog/archives/24) Regards, Ming On Thu, Jun 14, 2012 at 6:07 PM, Anshuman S. Rawat <arawat at 3clogic.com> wrote: > Hi, > > I am using PJSIP with UDP on Windows XP?and am repeatedly seeing crashes all > over the place. Actually this started happening after I increased > PJSIP_POOL_RDATA_LEN and PJSIP_POOL_RDATA_INC size to 8000 (I have reverted > it for now). > > I tried to debug using WinDbg and this is what I get: > > (668.ea8): Access violation - code c0000005 (first chance) > First chance exceptions are reported before any exception handling. > This exception may be expected and handled. > eax=00000002 ebx=07f00ec4 ecx=04a10858 edx=0be3e1a0 esi=7c911583 > edi=00000000 > eip=10032ff1 esp=0834fee4 ebp=0834ff1c iopl=0???????? nv up ei pl nz na pe > nc > cs=001b? ss=0023? ds=0023? es=0023? fs=003b? gs=0000 > efl=00010206 > sipPhone!poll_iocp+0xd1: > 10032ff1 8b4214????????? mov???? eax,dword ptr [edx+14h] > ds:0023:0be3e1b4=???????? > 0:009> k > ChildEBP RetAddr > 0834ff1c 10032d14 sipPhone!poll_iocp+0xd1 > [d:\src\pjsip\pjlib\src\pj\ioqueue_winnt.c @ 702] > 0834ff44 101cfcb0 sipPhone!pj_ioqueue_poll+0x64 > [d:\src\pjsip\pjlib\src\pj\ioqueue_winnt.c @ 917] > 0834ff6c 10005bea sipPhone!pjsip_endpt_handle_events2+0xb0 > [d:\src\pjsip\pjsip\src\pjsip\sip_endpoint.c @ 719] > 0834ff90 10004ab4 sipPhone!pjsua_handle_events+0x3a > [d:\pjsip\pjsip\src\pjsua-lib\pjsua_core.c @ 1769] > 0834ffa0 10027680 sipPhone!worker_thread+0x14 > [d:\src\pjsip\pjsip\src\pjsua-lib\pjsua_core.c @ 792] > 0834ffb4 7c80b729 sipPhone!thread_main+0x40 > [d:\src\pjsip\pjlib\src\pj\os_core_win32.c @ 435] > 0834ffec 00000000 kernel32!BaseThreadStart+0x37 > Line 702 in ioqueue_winnt.c: > > switch (pOv->operation) { > ...... > > Checking for pOv on Windbg reveals: > > 0:009> dt pov > Local var @ 0x834ff08 Type generic_overlapped* > 0x0be3e1a0 > ?? +0x000 overlapped?????? : _OVERLAPPED > ?? +0x014 operation??????? : ?? > Memory read error 0be3e1b4 > Checking for 0x0be3e1a0 in heap revevals: > > 0:009> !heap -p -a 0x0be3e1a0 > ??? address 0be3e1a0 found in > ??? _DPH_HEAP_ROOT @ 2811000 > ??? in free-ed allocation (? DPH_HEAP_BLOCK:???????? VirtAddr > VirtSize) > ??????????????????????????????????? c04ad38:????????? be3e000 > 5000 > ??? 7c927573 ntdll!RtlFreeHeap+0x000000f9 > ??? 78134c39 MSVCR80!free+0x000000cd > ??? 100320d8 sipPhone!default_block_free+0x00000038 > ??? 1002e7f8 sipPhone!reset_pool+0x00000078 > ??? 1002e775 sipPhone!pj_pool_reset+0x00000015 > ??? 101e2c7f sipPhone!udp_on_read_complete+0x0000020f > ??? 10033042 sipPhone!poll_iocp+0x00000122 > ??? 10032d14 sipPhone!pj_ioqueue_poll+0x00000064 > ??? 101cfcb0 sipPhone!pjsip_endpt_handle_events2+0x000000b0 > ??? 10005bea sipPhone!pjsua_handle_events+0x0000003a > ??? 10004ab4 sipPhone!worker_thread+0x00000014 > ??? 10027680 sipPhone!thread_main+0x00000040 > ??? 7c80b729 kernel32!BaseThreadStart+0x00000037 > Looks like heap corruption. This shouldn't be happenning. Any pointers on > how to go about fixing this? > > Thanks, > Anshuman > > PS: I am working for pjsip 1.8.10 > > _______________________________________________ > Visit our blog: http://blog.pjsip.org > > pjsip mailing list > pjsip at lists.pjsip.org > http://lists.pjsip.org/mailman/listinfo/pjsip_lists.pjsip.org >
