Wireshark · Wireshark-dev: Re: [Wireshark-dev] Debugging an assertion failure

[Ahmad Fatoum <ahmad@xxxxxx>]

Hi,

The message you pasted is the one MSVCRT's abort() prints (unless you _set_abort_behavior), so setting a breakpoint there should trigger at g_assert failure. https://msdn.microsoft.com/en-us/library/da5kh0wa(v=vs.120).aspx tells me you can press ctrl+b for that.

Regards,

Ahmad

On 14Apr 2017, at 13:22, Paul Offord <Paul.Offord@xxxxxxxxxxxx> wrote:

Hi Ahmed,

 

Thanks for the suggestion.  How do I break on abort()?  The assert seems to disappear into glib and abort is part of stdlib.

 

Best regards…Paul

 

From: wireshark-dev-bounces@xxxxxxxxxxxxx [mailto:wireshark-dev-bounces@xxxxxxxxxxxxx] On Behalf Of Ahmad Fatoum
Sent: 14 April 2017 11:54
To: Developer support list for Wireshark <wireshark-dev@xxxxxxxxxxxxx>
Subject: Re: [Wireshark-dev] Debugging an assertion failure

 

Hello Paul,

 

You could always put a breakpoint on abort(). There is surely some way to configure VS2013 to catch it, but this might be the wrong place to ask about that.

 

Best regards,

Ahmad

 

On 14Apr 2017, at 12:41, Paul Offord <Paul.Offord@xxxxxxxxxxxx> 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

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