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From: Andy Wingo <wingo@igalia.com>
To: Alexander Smundak <asmundak@google.com>
Cc: Doug Evans <dje@google.com>,  gdb-patches <gdb-patches@sourceware.org>
Subject: Re: [RFC] [PATCH] Provide the ability to write the frame unwinder in Python
References: <CAHQ51u7NUoQ8w9c5mc-Eiz05b1Nub6zqj_Ne7vfgWb5EP9_X8w@mail.gmail.com>	<21714.40641.510825.30998@ruffy2.mtv.corp.google.com>	<CAHQ51u5_ViLaEmv9e43R-wzuWw8dwNkb-2XgCRy5ELQq5FUAWg@mail.gmail.com>	<54E71694.1080304@redhat.com>	<CAHQ51u75+9HYAVJXYNQa0gTnQtYKEgmSkyAhAPYp-y4HGtXssg@mail.gmail.com>	<CAHQ51u6UZ7A47rpGgX0QGeYSTCz1eo_3jWHc=q2ZX3YhqcJ6iQ@mail.gmail.com>	<87ioei31uj.fsf@igalia.com>	<CAHQ51u4f+Vx7qXPm-KAAENOceaVogMbDMw6==N_nY+GrLr4Pgg@mail.gmail.com>	<87d24p19tt.fsf@igalia.com> <54FD7DAA.7010603@redhat.com>	<CAHQ51u7sUkGhkmvTaaO_Jo6Jn+kojfiMWHmc2=7OWHThAq6EKw@mail.gmail.com>	<87twxrncld.fsf@igalia.com>	<CAHQ51u60nHp1a2DXZ4srvRefyTtge1BUw7-=JuYqChHN_wUGyQ@mail.gmail.com>	<87ioe1dvu2.fsf@igalia.com>
Date: Mon, 16 Mar 2015 12:01:00 -0000
In-Reply-To: <87ioe1dvu2.fsf@igalia.com> (Andy Wingo's message of "Mon, 16 Mar	2015 12:29:25 +0100")
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Responding with a thinko:

On Mon 16 Mar 2015 12:29, Andy Wingo <wingo@igalia.com> writes:

>   * After accepting an UnwindInfo as an unwinder return result,
>     py-unwinders.c / scm-frame-unwinders.c marks the UnwindInfo as
>     frozen so that add_saved_register() etc can't alter the state

No need -- marking the associated EphemeralFrame as invalid will prevent
add_saved_register() from working.

Andy