Converting SIGSEGV signals to C++ exception in gcc/g++

David Daney
Mon Aug 22 18:44:00 GMT 2011

On 08/21/2011 03:02 PM, sudhakar govindavajhala wrote:
> Hi there,
> Is there a flag in compiling or using gcc/g++ so that a signal like
> SIGSEGV in my C++ program will result in an exception being thrown?
> If not, why not?  I mean, is this is not a reasonable expectation in
> Is there anything I need to be careful in throwing an exception in my
> signal handlers that convert SIGSEGV to an exception. I will ensure
> that no malloc style calls are called.

The GCJ runtime library libgcj does exactly this.  You can study it for 
the details.

Basically everything has to be compiled with -fnon-call-exceptions, and 
then you can throw exceptions right out of your signal handler.  The 
exception object can be populated with information about the machine 
state and perhaps a stack trace as well.

David Daney

> Thanks for your help.
> Sincerely,
> --Sudhakar

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