Re: g_free throwing an exception

[Pascal Quantin <pascal.quantin () gmail com>]

Hi Paul,

2017-11-05 12:15 GMT+01:00 Paul Offord <Paul.Offord () advance7 com>:

> Hi,
>
>
>
> I am working on a plugin dissector.  It works OK except when I change
> profiles Wireshark throws an exception in code in proto.c as follows:
>
>
>
> static void
>
> free_deregistered_field (gpointer data, gpointer user_data _U_)
>
> {
>
>                header_field_info *hfi = (header_field_info *) data;
>
>                gint hf_id = hfi->id;
>
>
>
>                g_free((char *)hfi->name);      <== The exception occurs on
> execution of this call
>
>
>
> The hfi structure looks valid and the hfi->name does point to a character
> string.
>
>
>
> The only thing I can see that might be wrong is that hfi->name has a data
> type of const char *
>
>
>
> How can I determine the cause of the exception?

Usually this is a sign of an attempt to free a memory block that was not
allocated with g_malloc. Is it a field from your plugin?

BR,
Pascal.


> Thanks and regards…Paul
>
>
>
> PS:  This is the latest git pull built with VS2013 on Windows 10 – I know
> I need to move to VS2015.
>
> ______________________________________________________________________
>
> This message contains confidential information and is intended only for
> the individual named. If you are not the named addressee you should not
> disseminate, distribute or copy this e-mail. Please notify the sender
> immediately by e-mail if you have received this e-mail by mistake and
> delete this e-mail from your system.
>
> Any views or opinions expressed are solely those of the author and do not
> necessarily represent those of Advance Seven Ltd. E-mail transmission
> cannot be guaranteed to be secure or error-free as information could be
> intercepted, corrupted, lost, destroyed, arrive late or incomplete, or
> contain viruses. The sender therefore does not accept liability for any
> errors or omissions in the contents of this message, which arise as a
> result of e-mail transmission.
>
> Advance Seven Ltd. Registered in England & Wales numbered 2373877 at
> Endeavour House, Coopers End Lane, Stansted, Essex CM24 1SJ
>
> ______________________________________________________________________
> This email has been scanned by the Symantec Email Security.cloud service.
> For more information please visit http://www.symanteccloud.com
> ______________________________________________________________________
>
> ____________________________________________________________
> _______________
> 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=unsubscr
> ibe
___________________________________________________________________________
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