[Mono-dev] SIGSEV Cores on Solaris

[Aaron Clauson]

Hi Zoltan,

You are right, sorry about that.

It actually turns out this is the line producing the SIGSEGV on Solaris x86:

IPAddress testAddress = null;
Console.WriteLine("Test Address = " + testAddress.ToString());

It will be easy to work around now I've worked out what the proper cause is but
the NullReferenceException is what gets thrown on Windows and Linux. 

Thanks,

Aaron

> -----Original Message-----
> From: mono-devel-list-bounces at lists.ximian.com [mailto:mono-devel-list-
> bounces at lists.ximian.com] On Behalf Of Zoltan Varga
> Sent: 25 March 2006 13:38
> To: aza at azaclauson.com
> Cc: mono-devel-list at lists.ximian.com
> Subject: Re: [Mono-dev] SIGSEV Cores on Solaris
> 
>                                         Hi,
> 
>   I couldn't repro this, it prints 'Access Denied' for me on sparc/x86. Please
> attach a complete testcase.
> 
>                         Zoltan
> 
> 
> On 3/25/06, Aaron Clauson <aza at azaclauson.com> wrote:
> > Hi,
> >
> > I forgot to say it was attempting to bind to the reserved port on a separate
> > thread. If the bind is attempted on the main thread then the exception is
> caught
> > ok.
> >
> > This code throws a SIGSEGV on Solaris for me.
> >
> > In main:
> > IPAddress m_testIPAddress =
> > Dns.Resolve(Dns.GetHostName()).AddressList[0].Address
> > Thread testIPAddressThread = new Thread(new ThreadStart(TestIPAddress));
> > testIPAddressThread.Start();
> >
> >
> > private static void TestIPAddress()
> > {
> >  try
> >  {
> >    IPAddress testAddress = m_currentTestAddress;
> >    Socket socket = new Socket(AddressFamily.InterNetwork, SocketType.Stream,
> > ProtocolType.Tcp);
> >    socket.Bind(new IPEndPoint(testAddress, 80));
> >  }
> >  Catch(Exception excp)
> >  {
> >   Console.WriteLine(excp.Message);
> >  }
> > }
> >
> > Thanks,
> >
> > Aaron
> >
> > > -----Original Message-----
> > > From: mono-devel-list-bounces at lists.ximian.com [mailto:mono-devel-list-
> > > bounces at lists.ximian.com] On Behalf Of Zoltan Varga
> > > Sent: 25 March 2006 12:27
> > > To: aza at azaclauson.com
> > > Cc: mono-devel-list at lists.ximian.com
> > > Subject: Re: [Mono-dev] SIGSEV Cores on Solaris
> > >
> > > SIGSEGV are not converted to exceptions in recent mono 1.1 releases, not
> even
> > > on linux and windows. What mono version are you using ? The default
> > > behavior is to abort after printing some diagnostic messages, and this
> > > cannot be changed.
> > > Also, binding to a reserved port shouldn't cause a SIGSEGV. Maybe this is
> a
> > > bug
> > > in the mono runtime which should be reported so it can be fixed.
> > >
> > >                                    Zoltan
> > >
> > > On 3/25/06, Aaron Clauson <aza at azaclauson.com> wrote:
> > > > Hi,
> > > >
> > > > I've done some playing around running some of our mono programs on
> Solaris
> > > > (i386) and the default behaviour for SIGSEV in native code appears to be
> to
> > > > generate a core dump. For example if I try and bind to TCP port 80 on
> > > Solaris I
> > > > get a core dump whereas on Windows and Linux I can catch the exception.
> > > >
> > > > Is there a way to change this behaviour so that SIGSEV signals in
> Solaris
> > > > generate exceptions instead?
> > > >
> > > > Thanks,
> > > >
> > > > Aaron
> > > >
> > > >
> > > >
> > > > _______________________________________________
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> > > >
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