Exceptions and so

Exceptions and so

[Henrik Nilsson (Developer)]

Hi 
I trying to use exceptions in a "so" file on GCC.
It seems like this it not working at all?
Process crash when throws the exception.
I have tried it on a Solaris 2.95.2
	and on RedaHat Linux 2.95.3
	
Anyone who have any experience of this?

Thanks
Henrik

Re: Exceptions and so

[bjorn rohde jensen]

Hi Henrik,

 You should be able to throw exceptions in a shared object
and even accross the so interface, but you have to be very
carefull. I have had interesting results stemming from
premature unloading of libraries due to thrown exceptions.
A simple design flaw on my behalf due to insufficient
understanding, but quite educational i guess;)
 You might want to check out comp.lang.c++.moderated, since
there is an interesting thread running now about the binary
compatibility of shared objects.
 Perhaps you could try to post a small contained example
demonstrating the problem?

Yours sincerely,

bjorn

RE: Exceptions and so

[Henrik Nilsson (Developer)]

Hi 

Well it's really simple code inside the shared object.
Not even this is working
prinf("Throw")
try{
	throw 1;
}
catch(int i){
	prinf("Catch")
}
I got the same result when compiling with gcc or g++
Bjorn
Can you specify comp.lang.c++.moderated
Thanks!
/Henrik




>Hi Henrik,

> You should be able to throw exceptions in a shared object
>and even accross the so interface, but you have to be very
>carefull. I have had interesting results stemming from
>premature unloading of libraries due to thrown exceptions.
>A simple design flaw on my behalf due to insufficient
>understanding, but quite educational i guess;)
> You might want to check out comp.lang.c++.moderated, since
there is an interesting thread running now about the binary
compatibility of shared objects.
 Perhaps you could try to post a small contained example
demonstrating the problem?

Yours sincerely,

bjorn

Re: Exceptions and so

[bjorn rohde jensen]

Hi Henrik,

 I cant get that to fail, i am not sure, what i am
doing wrong;) Are you using any special link options
or something?
 The thread on shared objects etc on
 comp.lang.c++.moderated is called Staying binary
compatible with plugins, there is quite a bit of
interesting things to read there.

Yours sincerely,

Bjorn