Re: Debugging an assertion failure

[Graham Bloice <graham.bloice () trihedral com>]

On 14 April 2017 at 12:20, Paul Offord <Paul.Offord () advance7 com> wrote:

> Hi Graham,
>
>
>
> I’ve just tried ticking all the options under Debug -> Exceptions … but I
> still don’t catch it.  It’s strange because I’m sure I caused and caught
> assertion exceptions in the past.
>
>
>
> Best regards…Paul

Modify the code to include a conditional just the same as the assert
condition, with a dummy assignment inside the conditional and then set a
breakpoint on that, e.g.

if (g_ascii_islower(c) || g_ascii_isdigit(c) || c == '_' || c == '-' || c
== '.') {
 int dummy = 0; // breakpoint here.
}


> *From:* wireshark-dev-bounces () wireshark org [mailto:wireshark-dev-bounces@
> wireshark.org] *On Behalf Of *Graham Bloice
> *Sent:* 14 April 2017 11:55
> *To:* Developer support list for Wireshark <wireshark-dev () wireshark org>
> *Subject:* Re: [Wireshark-dev] Debugging an assertion failure
>
>
>
>
>
>
>
> On 14 April 2017 at 11:41, Paul Offord <Paul.Offord () advance7 com> wrote:
>
> Hi,
>
>
>
> I need some advice.  I’m debugging a problem with a dissector I’ve
> written.  Tshark fails with:
>
> … \epan\prefs.c:414:prefs_register_module_or_subtree: assertion failed:
> (g_ascii_islower(c) || g_ascii_isdigit(c) || c == '_' || c == '-' || c ==
> '.')
>
> This application has requested the Runtime to terminate it in an unusual
> way.
> Please contact the application's support team for more information.
>
> If I remove the dissector the problem goes away and so I’m sure it’s the
> cause.
>
>
>
> Even though I can recreate the problem in a debug build under VS 2013 it
> doesn’t catch the exception.  I just see the above text flash by in the
> output command box.  How can I cause execution to break when it throws the
> exception?
>
>
>
> Thanks and regards…Paul
>
>
>
>
> I haven't tried this for g_assert() exceptions, but usually you need to
> open up Debug -> Windows -> Exception Settings and check more boxes.
>
>
>
> --
-- 
Graham Bloice

___________________________________________________________________________
Sent via:    Wireshark-dev mailing list <wireshark-dev () wireshark org>
Archives:    https://www.wireshark.org/lists/wireshark-dev
Unsubscribe: https://www.wireshark.org/mailman/options/wireshark-dev
             mailto:wireshark-dev-request () wireshark org?subject=unsubscribe