From: Jeff King <peff@peff.net>
To: Kalle Olavi Niemitalo <kon@iki.fi>
Cc: git@vger.kernel.org
Subject: Re: [PATCH 1/5] strbuf API additions and enhancements.
Date: Thu, 20 Sep 2007 12:10:07 -0400 [thread overview]
Message-ID: <20070920161007.GA22876@sigill.intra.peff.net> (raw)
In-Reply-To: <87lkb1iz0i.fsf@Astalo.kon.iki.fi>
On Thu, Sep 20, 2007 at 10:20:29AM +0300, Kalle Olavi Niemitalo wrote:
> Normative text in 7.15p3 confirms this: "The object ap may be
> passed as an argument to another function; if that function
> invokes the va_arg macro with parameter ap, the value of ap in
> the calling function is indeterminate and shall be passed to the
> va_end macro prior to any further reference to ap."
>
> Therefore va_copy is needed here, at least in principle.
Not just in principle; a few months ago, I ran afoul of the same issue
using gcc + glibc6, so it is a real problem for our target platforms
(sorry, I don't have a test case anymore, but I recall getting
undefined-ish behavior from my print statements).
-Peff
next prev parent reply other threads:[~2007-09-20 16:10 UTC|newest]
Thread overview: 29+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-09-18 22:39 let's refactor quoting Pierre Habouzit
2007-09-18 17:18 ` [PATCH 1/5] strbuf API additions and enhancements Pierre Habouzit
2007-09-19 12:46 ` Edgar Toernig
2007-09-19 13:36 ` Pierre Habouzit
2007-09-19 18:46 ` Junio C Hamano
2007-09-20 6:17 ` Johannes Sixt
2007-09-20 7:20 ` Kalle Olavi Niemitalo
2007-09-20 16:10 ` Jeff King [this message]
2007-09-18 20:15 ` [PATCH 2/5] sq_quote_argv and add_to_string rework with strbuf's Pierre Habouzit
2007-09-19 8:09 ` Junio C Hamano
2007-09-19 8:23 ` Pierre Habouzit
2007-09-18 21:22 ` [PATCH 3/5] Rework unquote_c_style to work on a strbuf Pierre Habouzit
2007-09-19 0:14 ` Pierre Habouzit
2007-09-19 8:09 ` Junio C Hamano
2007-09-19 8:22 ` Pierre Habouzit
2007-09-18 21:48 ` [PATCH 5/5] Avoid duplicating memory, and use xmemdupz instead of xstrdup Pierre Habouzit
2007-09-18 22:00 ` [PATCH 4/5] Full rework of quote_c_style and write_name_quoted Pierre Habouzit
2007-09-19 0:07 ` Pierre Habouzit
2007-09-19 0:55 ` Junio C Hamano
2007-09-19 1:14 ` Pierre Habouzit
2007-09-19 6:37 ` Andreas Ericsson
2007-09-19 8:00 ` Pierre Habouzit
2007-09-19 8:08 ` Andreas Ericsson
2007-09-19 8:21 ` Pierre Habouzit
2007-09-19 8:28 ` David Kastrup
2007-09-19 8:31 ` Junio C Hamano
2007-09-19 8:38 ` David Kastrup
2007-09-19 8:28 ` Junio C Hamano
2007-09-19 8:47 ` Pierre Habouzit
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