Re: Inexplicable Parameter-Passing Phenomena w/MinGW GCJ

[Michael Koch <konqueror at gmx dot de>]

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Am Mittwoch, 10. September 2003 21:32 schrieb Mark Wielaard:
> Hi,
>
> On Wed, 2003-09-10 at 16:37, Andrew Haley wrote:
> > Mohan Embar writes:
> >  > Good gravy. You're right. The call in impl.setOption() in
> >  > DatagramSocket:
> >  >
> >  > ---------------------------------------8<---------------------
> >  >------------- public synchronized void setSoTimeout(int
> >  > timeout) throws SocketException {
> >  >     if (timeout < 0)
> >  >       throw new IllegalArgumentException("Invalid timeout: " +
> >  > timeout);
> >  >
> >  >     impl.setOption(SocketOptions.SO_TIMEOUT, new
> >  > Integer(timeout)); }
> >  > ---------------------------------------8<---------------------
> >  >-------------
> >  >
> >  > ...ends up calling getOption() in
> >  > natPlainDatagramSocketImplWin32.cc: and impl.getOption() ends
> >  > up calling setOption with a totally bogus second parameter.
> >
> >  [...]
> > <Deep Thought mode>  All right, ... You're really not going to
> > like it.
> >
> > I would look at some assembly code.  For whatever reason, the
> > caller and the called have different opinions about the method
> > table offset of setSoTimeout().
> >
> > I still wonder if the compiler might be looking at different
> > versions of DatagramSocket.
>
> This might or might not be related, but this code yells "Miranda
> Method!" to me. setOption() is defined in the interface
> SocketOptions, which is implemented (but not defined) in the
> abstract class DatagramSocketImpl and finally implemented in the
> class
> natPlainDatagramSocketImplXXX.
>
> I really simple thing to check would be to explicitly defined
> setOption() as an abstract method in the class DatagramSocketImpl.

Can Miranda bugs be platform specific ? it works here on Linux.

Michael
- -- 
Homepage: http://www.worldforge.org/
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