linux-kernel - Re: [RFC / musing] Scoped exception handling in Linux userspace?

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Message-Id: <0513AB0D-9821-4817-BAF6-5378E5BCD0C0@adacore.com>
Date:	Fri, 19 Jul 2013 07:43:40 +0200
From:	Tristan Gingold <gingold@...core.com>
To:	Andy Lutomirski <luto@...capital.net>
Cc:	linux-kernel@...r.kernel.org, gcc@....gnu.org
Subject: Re: [RFC / musing] Scoped exception handling in Linux userspace?

On Jul 19, 2013, at 2:26 AM, Andy Lutomirski wrote:

> Windows has a feature that I've wanted on Linux forever: stack-based
> (i.e. scoped) exception handling.  The upshot is that you can do,
> roughly, this (pseudocode):

[...]

Indeed Windows and OpenVMS have such a mechanism. That's clean and
library friendly, but please read:
https://www.usenix.org/conference/wiess-2000/c-exception-handling-ia64
to understand how it hurts optimization.

(And no, raising an exception from an handler doesn't always work,
 due to optimizations allowed by the gcc exception mechanism).

Regards,
Tristan.

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