Re: Floating Point Exception Handling

[Andrew Haley <aph at redhat dot com>]

Jim Wilson writes:
 > John L. Kulp wrote:
 > > I'd like to get connected with whomever is working on topics like the
 > > interaction between SIGFPE handlers and try/catch stack unwinding in
 > > C++.

I suppose the person with the most experience with unwinding and
signal handlers would be me.

 > There are few people expert in this area, and they are all very busy 
 > people.  There may not be anyone who has time to help you.
 > 
 > Unwinding from signal handlers should work fine for any IA-64 target. 
 > For other targets, it is probably iffy.  Our EH support was designed for 
 > C++ which does not need this.  It has been expanded to support Java 
 > which does need this, but this requires special options 
 > (-fnon-call-exceptions), and probably still needs more work to handle 
 > all cases.

I'm not aware of any current problems with unwinding from SIGFPE
handlers.  However, we don't actually do this on many gcj targets
because we haven't made it a big priority.  

Andrew.