Re: how to build gnugk with debug-info('-g' option) Thanks!

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I continued to do some testing and GDB shows a segmentation fault by dynamic_cast in ProxyChannel.cxx, around line-1250:

... 
void TCPProxySocket::DetachRemote()
{
PWaitAndSignal lock(m_remoteLock);

if (remote) {
remote->remote = NULL; // detach myself from remote
CallSignalSocket * css = dynamic_cast<CallSignalSocket *> (remote);
if (!css || !css->MaintainConnection())
remote->SetDeletable();

remote = NULL;
}
}
...


the line who cause segmentation fault is:
CallSignalSocket * css = dynamic_cast<CallSignalSocket *> (remote);

when one of the connected endpoints crash, then this segmentation fault happens and gnuGK crash too.  I tried adding a try/catch but still cannot avoid this segmentation fault, I am not sure why this segmentation fault cannot be caught,  could you help me find a way to handle this segmentation fault? Thanks!

Regards,
Bo Xu




On Thu, Jul 17, 2014 at 4:35 PM, Bo Xu <boxuscience@xxxxxxxxx> wrote:
Hello Jan,

here is the backtrace mentioned in 14.3 Debugging GnuGk (on Linux) ,Thanks!


...
[New Thread 13843]
[New Thread 13695]
[New Thread 13688]
[New Thread 13682]
Missing separate debuginfo for /usr/local/lib/libpcap.so.1
Try: yum --disablerepo='*' --enablerepo='*-debug*' install /usr/lib/debug/.build-id/9f/c636ddb5b085c564d56f0cf114e0364d1e04a0
Missing separate debuginfo for 
Try: yum --disablerepo='*' --enablerepo='*-debug*' install /usr/lib/debug/.build-id/9d/2c86b060c510aca82bc27181f58d52e2aa6c1c
Reading symbols from /usr/local/lib/libpcap.so.1...done.
Loaded symbols for /usr/local/lib/libpcap.so.1
Reading symbols from /lib64/libresolv.so.2...(no debugging symbols found)...done.
Loaded symbols for /lib64/libresolv.so.2
Reading symbols from /lib64/libpthread.so.0...(no debugging symbols found)...done.
[Thread debugging using libthread_db enabled]
Loaded symbols for /lib64/libpthread.so.0
Reading symbols from /lib64/librt.so.1...(no debugging symbols found)...done.
Loaded symbols for /lib64/librt.so.1
Reading symbols from /lib64/libdl.so.2...(no debugging symbols found)...done.
Loaded symbols for /lib64/libdl.so.2
Reading symbols from /usr/lib64/libstdc++.so.6...(no debugging symbols found)...done.
Loaded symbols for /usr/lib64/libstdc++.so.6
Reading symbols from /lib64/libm.so.6...(no debugging symbols found)...done.
Loaded symbols for /lib64/libm.so.6
Reading symbols from /lib64/libgcc_s.so.1...(no debugging symbols found)...done.
Loaded symbols for /lib64/libgcc_s.so.1
Reading symbols from /lib64/libc.so.6...(no debugging symbols found)...done.
Loaded symbols for /lib64/libc.so.6
Reading symbols from /lib64/ld-linux-x86-64.so.2...(no debugging symbols found)...done.
Loaded symbols for /lib64/ld-linux-x86-64.so.2
Reading symbols from /lib64/libnss_files.so.2...(no debugging symbols found)...done.
Loaded symbols for /lib64/libnss_files.so.2
Core was generated by `./gnugk -c /root/openh323gk/zMYgnugkRUN/gatekeeper_Layland.ini -o /root/openh32'.
Program terminated with signal 11, Segmentation fault.
#0  0x000000386a4bb3b9 in __dynamic_cast () from /usr/lib64/libstdc++.so.6
Missing separate debuginfos, use: debuginfo-install glibc-2.12-1.132.el6.x86_64 libgcc-4.4.7-4.el6.x86_64 libstdc++-4.4.7-4.el6.x86_64
(gdb) bt
#0  0x000000386a4bb3b9 in __dynamic_cast () from /usr/lib64/libstdc++.so.6
#1  0x0000000000511231 in TCPProxySocket::DetachRemote (this=0x7fafac0f54e0)
    at ProxyChannel.cxx:1245
#2  0x0000000000510fca in TCPProxySocket::~TCPProxySocket (this=0x7fafac0f54e0, 
    __vtt_parm=0x987428, __in_chrg=<value optimized out>) at ProxyChannel.cxx:1238
#3  0x0000000000515424 in CallSignalSocket::~CallSignalSocket (this=0x7fafac0f54e0, 
    __in_chrg=<value optimized out>, __vtt_parm=<value optimized out>)
    at ProxyChannel.cxx:1714
#4  0x00000000005154ac in CallSignalSocket::~CallSignalSocket (this=0x7fafac0f54e0, 
    __in_chrg=<value optimized out>, __vtt_parm=<value optimized out>)
    at ProxyChannel.cxx:1714
#5  0x00000000005581e7 in ProxyHandler::CleanUp (this=0x181ce60)
    at ProxyChannel.cxx:13966
#6  0x000000000040e0b1 in SocketsReader::Exec (this=0x181ce60) at yasocket.cxx:1059
#7  0x000000000055966c in ProxyHandler::Exec (this=0x181ce60) at ProxyChannel.cxx:14322
#8  0x000000000040ac7c in RegularJob::Run (this=0x181ce60) at job.cxx:432
#9  0x0000000000409b98 in Worker::Main (this=0x181d360) at job.cxx:182
#10 0x00000000009139a2 in PThread::PX_ThreadStart (arg=0x181d360)
    at ptlib/unix/tlibthrd.cxx:491
---Type <return> to continue, or q <return> to quit---


Regards,
Bo Xu




On Thu, Jul 17, 2014 at 3:53 PM, Bo Xu <boxuscience@xxxxxxxxx> wrote:
Hello Jan,

Thanks a lot!

Regards,
Bo Xu






Hi, 

just compile GnuGk with "make debugnoshared". 

For more details see chapter 14.3 in the manual. 

Regards, 
Jan 


On 17. Juli 2014 18:42:40 MESZ, Bo Xu <boxuscience@...> wrote:
>Hi,
>
>I am running gnuGK-3.6 on linux, sometimes when one of the connected
>endpoints crashed then gnuGK also crashed and I got "Segmentation fault
>(core dumped)" error and I got the dumped core. I want to debug this
>core
>with gdb so I need to build the gnuGK with '-g' option, but I don't
>know
>how to modify the Makefile to do it, could you tell me how to add '-g'
>option into the Makefile when building  gnuGK? Thanks!
>
>Regards,
>Bo Xu
>


On Thu, Jul 17, 2014 at 12:42 PM, Bo Xu <boxuscience@xxxxxxxxx> wrote:
Hi,

I am running gnuGK-3.6 on linux, sometimes when one of the connected endpoints crashed then gnuGK also crashed and I got "Segmentation fault (core dumped)" error and I got the dumped core. I want to debug this core with gdb so I need to build the gnuGK with '-g' option, but I don't know how to modify the Makefile to do it, could you tell me how to add '-g' option into the Makefile when building  gnuGK? Thanks!

Regards,
Bo Xu



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