RE: [reSIProcate] Really Strange compiler behaviour

["Karl Mutch" <kmutch@xxxxxxxxxxxxx>]

I  believe the problem you are having is that you are using the this pointer of a

partially constructed object.and passing it into another constructor.  If this does

work then it is purely by chance/side effect etc, especially if you are using this

code in a release build with MSVC.  In any event I dont think this is really legal ?

 

Boost provides a means for controlling the order of member initialization that may

help your chicken and egg situation, which leads me to a rant about why are we

not using boost, memory leaks et al, but I will restrain myself ;-)

 

Thanks

Karl

 

-----Original Message-----
From: resiprocate-devel-bounces@xxxxxxxxxxxxxxxxxxx [mailto:resiprocate-devel-bounces@xxxxxxxxxxxxxxxxxxx] On Behalf Of Matthias Moetje - TERASENS GmbH
Sent: Friday, April 21, 2006 6:31 AM
To: resiprocate-devel@xxxxxxxxxxxxxxxxxxx
Subject: [reSIProcate] Really Strange compiler behaviour

 

Hi,

 

I am experiencing some really strange behaviour on the

following lines in the constructor of DialogUsageManager:

 

mIncomingTarget = new IncomingTarget(*this);

mOutgoingTarget = new OutgoingTarget(*this);

 

Actually the objects are created through _nh_malloc_dbg
when I debug through the generic runtime implementation
of the new operator; afterwards the constructors of
the object and the inherited objects are called. Though,
in the end the result from the new operator is not assigned
to the pointer variable i.e. in the end the pointer variable
is NULL.

But if I note the pointer from the operator new implementation
and assign it to the variable(s) manually in the debugger, everything
is fine!

Seems very strange to me! I'm using VS.NET 2005. All I could
think of here is probably the way the dum object itself is
passed into the constructor (*this)..?

Does anyone have an idea why this happens? I thought of
passing dum as a pointer instead, but that would require a
change to dum itself...

I would be very thankful for any hints on this, I have no other
idea about that...

Best regards,

Matthias Moetje