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Re: How to backtrace an separate stack?


From: Florian Weimer
Subject: Re: How to backtrace an separate stack?
Date: Wed, 09 Mar 2022 11:06:19 +0100
User-agent: Gnus/5.13 (Gnus v5.13) Emacs/27.2 (gnu/linux)

* Tom Tromey:

> Florian> I'm a bit surprised by this.  Conceptually, why would GDB need to 
> know
> Florian> about stack boundaries?  Is there some heuristic to detect broken
> Florian> frames?
>
> Yes, the infamous "previous frame inner to this frame" error message.  I
> think this is primarily intended to detect stack trashing, but maybe it
> also serves to work around bad debuginfo or bugs in the unwinders.
>
> This error was disabled for cases where the GCC split stack feature is
> used.  There's been requests to disable it in other cases as well, I
> think.

Is there a user-level command to disable the check manually?

Thanks,
Florian




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