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From: "siddhesh at gotplt dot org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug middle-end/101397] [11 Regression] spurious warning writing to the result of stpcpy minus 1
Date: Tue, 26 Oct 2021 14:24:12 +0000 [thread overview]
Message-ID: <bug-101397-4-TfNApp6aaS@http.gcc.gnu.org/bugzilla/> (raw)
In-Reply-To: <bug-101397-4@http.gcc.gnu.org/bugzilla/>
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=101397
Siddhesh Poyarekar <siddhesh at gotplt dot org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |siddhesh at gotplt dot org
--- Comment #7 from Siddhesh Poyarekar <siddhesh at gotplt dot org> ---
(In reply to CVS Commits from comment #4)
> The master branch has been updated by Martin Sebor <msebor@gcc.gnu.org>:
>
> https://gcc.gnu.org/g:8bf5b49ebd2176b8c535147377381dd07fbdd643
>
> commit r12-2422-g8bf5b49ebd2176b8c535147377381dd07fbdd643
> Author: Martin Sebor <msebor@redhat.com>
> Date: Tue Jul 20 13:48:20 2021 -0600
>
> Correct stpcpy offset computation for -Warray-bounds et al. [PR101397].
This causes a crash with the following program due to an infinite recursion:
typedef __SIZE_TYPE__ size_t;
void
__attribute__ ((noinline))
foo (size_t x)
{
struct T { char buf[64]; char buf2[64]; } t;
char *p = &t.buf[8];
char *r = t.buf2;
size_t i;
for (i = 0; i < x; i++)
{
r = __builtin_mempcpy (r, p, i);
p = r + 1;
}
}
$ cc1.r12-2422 -quiet -o - repro.c
.file "repro.c"
.text
Segmentation fault (core dumped)
next prev parent reply other threads:[~2021-10-26 14:24 UTC|newest]
Thread overview: 12+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-07-09 18:23 [Bug middle-end/101397] New: " msebor at gcc dot gnu.org
2021-07-09 18:25 ` [Bug middle-end/101397] [11/12 Regression] " msebor at gcc dot gnu.org
2021-07-12 17:20 ` msebor at gcc dot gnu.org
2021-07-15 1:50 ` msebor at gcc dot gnu.org
2021-07-20 19:52 ` cvs-commit at gcc dot gnu.org
2021-07-20 19:53 ` [Bug middle-end/101397] [11 " msebor at gcc dot gnu.org
2021-07-28 7:07 ` rguenth at gcc dot gnu.org
2021-10-26 14:24 ` siddhesh at gotplt dot org [this message]
2021-11-09 0:06 ` msebor at gcc dot gnu.org
2021-12-09 16:58 ` msebor at gcc dot gnu.org
2022-04-21 7:49 ` rguenth at gcc dot gnu.org
2023-05-29 10:05 ` jakub at gcc dot gnu.org
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