Re: [Quickfix-developers] Seg fault in libc.so while working with quickfix from Java

[Gene G. <mus...@ya...>]

The question is whether this is the same crash as
Sergey's. If your stack is the same as reported by
Sergey, chances are that it is, and that you missed
something in the examples rebuild process (patch,
make, make install, examples/make). If this is a
different problem you may try other patches which I
posted. If this also fails, as Oren suggests you can
try putting tracing printf's in the code, or you will
have to debug. To do that edit configure.in, add "-g
-O0" to "CFLAGS", run configure and make again and
then run gdb (I prefer a bit friendlier ddd shell)
against java process. If you post stack that is
reported it will give further clues to what is wrong.

Gene
--- David Monheit <Dav...@mo...>
wrote:
> Hi Gene,
> 
> I have applied both your patches and rebuilt all. 
> Unfortunately, I still get
> the core dump :-(  I also made sure that the host
> names (and tried ip addresses
> as well) were sensisble.
> 
> How does one debug a jni lib?  By attaching to the
> running java code with gdb?
> 
> Thanks and regards
> David
> 
> Gene Gorokhovsky wrote:
> 
> > This, as Sergey discovered the hard way, is what
> > happens on Linux when the initiator's
> > SocketConnectHost is invalid.  The reason is that
> > Quickfix Utility.cpp and SocketConnector.cpp
> ignore
> > bad return from gethostbyname. This is easily
> > reproducible on Linux by changing
> SocketConnectHost in
> > cfg/tradeclient.cfg and banzai.cfg to something
> > random. Both C++ and JNI client will fail with
> > segfaults when session connect will be attempted.
> >
> > The chain of events is as follows:
> > Invalid host name is specified in call to
> > socket_createConnector
> > socket_createConnector calls socket_hostname
> > socket_hostname  calls gethostbyname which returns
> > NULL
> > socket_hostname in turn returns NULL, which gets
> > passes as an argument to inet_addr
> > inet_addr calls inet_aton internally, which
> crashes
> > because its parameter is NULL instead of required
> > pointer.
> >
> > Here is the two patches that fix this problem.
> >
> > Stylistically there is some code overlap between
> > Utility.cpp and SocketConnector.cpp, which in the
> best
> > of worlds should be eliminated, but I prefer my
> > patches to be minimally invasive.
> >
> > Gene
> > --- Sergey Gribov <se...@se...> wrote:
> > > Hello,
> > >
> > > We have the following problem while working from
> > > Java:
> > > at a start time the Java application which uses
> the
> > > quickfix
> > > version 1.3.2 it fails with the following
> exception:
> > >
> > >
> > > An unexpected exception has been detected in
> native
> > > code outside the VM.
> > > Unexpected Signal : 11 occurred at PC=0x40149C73
> > > Function=inet_aton+0x3F
> > > Library=/lib/libc.so.6
> > >
> > > Current Java thread:
> > >         at
> > > org.quickfix.SocketInitiator.doStart(Native
> Method)
> > >         at
> > > org.quickfix.SocketInitiator.start(Unknown
> Source)
> > > .....
> > >
> > > Anybody saw something like this?
> > > Some other quickfix Java applications seems to
> be
> > > working fine...
> > >
> > > Any idea what can cause it?
> > >
> > > Thanks in advance,
> > >
> > > --
> > >
> >
>
//========================================================================\\
> > >         Sergey Gribov                 |   A
> > > specialist is someone who
> > >   E-Mail: se...@se...           | learns
> more
> > > and more about less
> > >   WWW:    http://www.sergey.com/      | and
> less,
> > > and ends up knowing
> > >   Phone:  (617)7101683                |
> everything
> > > about nothing...
> > >
> >
>
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> > >
> > >
> > >
> > >
> >
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> >  
>
------------------------------------------------------------------------
> > --- Utility.cpp Tue Mar 18 17:23:17 2003
> > +++ /home/geneg/tmp/Utility.cpp Thu Feb 20
> 00:34:31 2003
> > @@ -112,13 +112,9 @@
> >  {
> >    int socket = ::socket( PF_INET, SOCK_STREAM,
> IPPROTO_TCP );
> > -  const char * num_dot_addr = socket_hostname(
> address );
> > -  if (num_dot_addr == 0)
> > -    return -1;
> >
> >    sockaddr_in addr;
> >    addr.sin_family = PF_INET;
> >    addr.sin_port = htons( port );
> > -  addr.sin_addr.s_addr = inet_addr(num_dot_addr);
> > -
> > +  addr.sin_addr.s_addr = inet_addr(
> socket_hostname( address ) );
> >
> >    int result = connect( socket, reinterpret_cast
> < sockaddr* > ( &addr ),
> >
> >  
>
------------------------------------------------------------------------
> > --- SocketConnector.cpp Tue Mar 18 21:11:01 2003
> > +++ /home/geneg/tmp/SocketConnector.cpp Tue Mar 18
> 21:08:13 2003
> > @@ -107,12 +107,8 @@
> >    int sock = socket( PF_INET, SOCK_STREAM,
> IPPROTO_TCP );
> >
> > -  const char * num_dot_addr = socket_hostname(
> address.c_str() );
> > -  if (num_dot_addr == 0)
> > -    return 0;
> > -
> >    sockaddr_in addr;
> >    addr.sin_family = PF_INET;
> >    addr.sin_port = htons( port );
> > -  addr.sin_addr.s_addr = inet_addr(num_dot_addr
> );
> > +  addr.sin_addr.s_addr = inet_addr(
> socket_hostname( address.c_str() ) );
> >
> >    int result = ::connect( sock, reinterpret_cast
> < sockaddr* > ( &addr ),
> 
> --
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> 
> 

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