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bug#7190: Crash in menus on w32


From: Lennart Borgman
Subject: bug#7190: Crash in menus on w32
Date: Tue, 19 Oct 2010 12:33:49 +0200

On Tue, Oct 19, 2010 at 7:59 AM, Eli Zaretskii <address@hidden> wrote:
>> From: Lennart Borgman <address@hidden>
>> Date: Tue, 19 Oct 2010 02:20:42 +0200
>> Cc: address@hidden
>>
>> >          entry = AREF (vector, i + MENU_ITEMS_ITEM_VALUE);
>> >
>> > retrieves the selected menu item, and `vector' is the entire menu bar,
>> > computed as
>> >
>> >  vector = f->menu_bar_vector;
>> >
>> > See frame.h for the structure of this vector.
>> >
>> > By looking at `entry' you can find which menu item is being selected.
>> >
>> > Then in w32_free_submenu_strings, you can see the same info in its
>> > bare C form.
>>
>> I just got a new crash, but unfortunately I have still not understand
>> how to look at those values.
>
> Please be specific: what parts in the explanation above you don't
> understand?  I don't know how to answer a question "I don't understand
> how to do X", when I already explained how to do it.
>
>> With "bt full"
>
> "bt full" is useless in this case, because the problem is a corruption
> of the heap.  We need to establish which menu item(s) are corrupted,
> and the information about that is not in local variables displayed by
> "bt full", it's in the data structures manipulated by
> w32_free_submenu_strings and w32_free_menu_strings.  I gave you above
> the way to start looking at these data structures.

Could you please tell me the exact commands to look at those data structures?





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