From: Joseph Myers <joseph@codesourcery.com>
To: Martin Sebor <msebor@gmail.com>
Cc: Gcc Patch List <gcc-patches@gcc.gnu.org>
Subject: Re: [PATCH] have -Wformat-overflow handle -fexec-charset (PR 80503)
Date: Thu, 27 Apr 2017 03:39:00 -0000 [thread overview]
Message-ID: <alpine.DEB.2.20.1704262224580.2840@digraph.polyomino.org.uk> (raw)
In-Reply-To: <055b63b9-2303-6031-021c-c216e94ed072@gmail.com>
On Wed, 26 Apr 2017, Martin Sebor wrote:
> Testing my solution for bug 77671 (missing -Wformat-overflow
> sprintf with "%s") caused a regression in the charset/builtin2.c
> test for bug 25120 (builtin *printf handlers are confused by
> -fexec-charset). That led me to realize that like -Wformat
> itself, the whole gimple-ssa-sprintf pass is oblivious to
> potential differences between the source character set on
> the host and the execution character set on the target. As
> a result, when the host and target sets are different, the
> pass misinterprets ordinary format characters as special
> (e.g., parts of directives) and vice versa.
>
> The attached patch implements a simple solution to this problem
> by introducing a mapping between the two sets.
target_strtol10 appears to do no checking for overflow, which I'd expect
would result in nonsensical results for large width values overflowing
host long (whereas strtol would reliably return LONG_MAX in such cases).
--
Joseph S. Myers
joseph@codesourcery.com
next prev parent reply other threads:[~2017-04-26 22:27 UTC|newest]
Thread overview: 21+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-04-26 22:27 Martin Sebor
2017-04-27 3:39 ` Joseph Myers [this message]
2017-04-27 5:07 ` Jakub Jelinek
2017-04-27 22:52 ` Martin Sebor
2017-04-28 16:35 ` Jeff Law
2017-04-28 16:37 ` Jakub Jelinek
2017-04-28 17:05 ` Jeff Law
2017-04-28 18:32 ` Martin Sebor
2017-04-28 19:14 ` Jeff Law
2017-04-29 20:44 ` Andreas Schwab
2017-05-03 14:35 ` Christophe Lyon
2017-05-03 15:02 ` Martin Sebor
2017-05-03 15:24 ` Christophe Lyon
2017-06-02 15:38 ` Renlin Li
2017-06-04 22:24 ` Martin Sebor
2017-06-13 8:16 ` Renlin Li
2017-06-20 11:00 ` Renlin Li
2018-01-31 17:57 ` Renlin Li
2018-02-01 0:41 ` Martin Sebor
2018-02-01 11:54 ` Renlin Li
2018-02-01 18:27 ` Martin Sebor
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