• Callum Anderson <callumenator gmail.com> Aug 10 2011
• Jonathan M Davis <jmdavisProg gmx.com> Aug 11 2011
• Callum Anderson <callumenator gmail.com> Aug 11 2011
• Callum Anderson <callumenator gmail.com> Aug 11 2011
• Jonathan M Davis <jmdavisProg gmx.com> Aug 11 2011
• Russel Winder <russel russel.org.uk> Aug 11 2011

Callum Anderson <callumenator gmail.com> writes:

Hi,

Is there any way to catch unhandled exceptions thrown by external libraries? I
am
calling an external C library function, which works fine in release mode,
however
in debug mode it throws a SIGSEV. I would like to debug later parts of the code,
but can;t get past this function when debugging because of the exception.

I have tried putting the function call in try/catch, tried a scope(failure) and
tried collectException() from std.exception. Is it possible to catch these
exceptions?

Thanks alot,
Callum

Jonathan M Davis <jmdavisProg gmx.com> writes:

On Thursday, August 11, 2011 06:53:57 Callum Anderson wrote:
 Hi,
 
 Is there any way to catch unhandled exceptions thrown by external libraries?
 I am calling an external C library function, which works fine in release
 mode, however in debug mode it throws a SIGSEV. I would like to debug later
 parts of the code, but can;t get past this function when debugging because
 of the exception.
 
 I have tried putting the function call in try/catch, tried a scope(failure)
 and tried collectException() from std.exception. Is it possible to catch
 these exceptions?


SIGSEV is a signal, not an exception. No exception handling code will do 
anything with it. And pure c code _can't_ throw exceptions of any kind, 
because C has no exceptions (it _might_ be possible for an exception to come 
out of C code which called code from another language which _does_ have 
ecxeptions, but I'm not sure). If you want to handle SIGSEGV, you need a use a 
signal handler.

- Jonathan M Davis

Callum Anderson <callumenator gmail.com> writes:

Thanks,
SIGSEGV was a brain malfunction on my part sorry. The error was SIG Unhandled
Exception. And I should have said I was calling a C-Api layer on a C++ library.
Does that change anything?
Thanks again,
Callum

Callum Anderson <callumenator gmail.com> writes:

Ok thanks for the help, wasn't sure if I was missing something obvious.
Cheers,
Callum

Jonathan M Davis <jmdavisProg gmx.com> writes:

On Thursday, August 11, 2011 07:29:35 Callum Anderson wrote:
 Thanks,
 SIGSEGV was a brain malfunction on my part sorry. The error was SIG
 Unhandled Exception. And I should have said I was calling a C-Api layer on
 a C++ library. Does that change anything?
 Thanks again,
 Callum


I really don't know what happens with C++ exceptions that get thrown when the 
C++ is wrapped in a C API. So, I can't really help you there. The best that I 
could do is google for it.

- Jonathan M Davis

Russel Winder <russel russel.org.uk> writes:

Content-Type: text/plain; charset="UTF-8"
Content-Transfer-Encoding: quoted-printable

On Thu, 2011-08-11 at 00:42 -0700, Jonathan M Davis wrote:
 On Thursday, August 11, 2011 07:29:35 Callum Anderson wrote:
 Thanks,
 SIGSEGV was a brain malfunction on my part sorry. The error was SIG
 Unhandled Exception. And I should have said I was calling a C-Api layer=




 a C++ library. Does that change anything?
 Thanks again,
 Callum


 I really don't know what happens with C++ exceptions that get thrown when=


 C++ is wrapped in a C API. So, I can't really help you there. The best th=


 could do is google for it.


Join ACCU http://accu.org.  Get on their general mailing list.  Ask
there, and you'll either get an answer immediately or an answer will
emerge from the ensuing debate.  ACCU has a high percentage of very
highly knowledgeable and skilled C++ folk, including lots of people on
the standards committees.

ACCU also has Java, C#, Python, agile process, etc. folk and activity,
but given it is an organization originally created from a merge of the C
User Group, and the European C++ user Group . . .

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