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authorRincewindsHat <12514511+RincewindsHat@users.noreply.github.com>2023-01-31 13:46:01 (GMT)
committerRincewindsHat <12514511+RincewindsHat@users.noreply.github.com>2023-01-31 13:46:01 (GMT)
commite8bd88d1fcded01ccd066572eeaae1b507989cb3 (patch)
treec8e7be6c07c6f635f6e803e6a6ba9e7a95fee7c0 /gl/free.c
parent2ad962c13473607ca0d974bfaa516a0ed53ec73d (diff)
downloadmonitoring-plugins-e8bd88d1fcded01ccd066572eeaae1b507989cb3.tar.gz
Sync with the latest Gnulib code 668c0b8ffa
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1/* Make free() preserve errno.
2
3 Copyright (C) 2003, 2006, 2009-2023 Free Software Foundation, Inc.
4
5 This file is free software: you can redistribute it and/or modify
6 it under the terms of the GNU Lesser General Public License as
7 published by the Free Software Foundation; either version 2.1 of the
8 License, or (at your option) any later version.
9
10 This file is distributed in the hope that it will be useful,
11 but WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 GNU Lesser General Public License for more details.
14
15 You should have received a copy of the GNU Lesser General Public License
16 along with this program. If not, see <https://www.gnu.org/licenses/>. */
17
18/* written by Paul Eggert */
19
20#include <config.h>
21
22/* Specification. */
23#include <stdlib.h>
24
25/* A function definition is only needed if HAVE_FREE_POSIX is not defined. */
26#if !HAVE_FREE_POSIX
27
28# include <errno.h>
29
30void
31rpl_free (void *p)
32# undef free
33{
34# if defined __GNUC__ && !defined __clang__
35 /* An invalid GCC optimization
36 <https://gcc.gnu.org/bugzilla/show_bug.cgi?id=98396>
37 would optimize away the assignments in the code below, when link-time
38 optimization (LTO) is enabled. Make the code more complicated, so that
39 GCC does not grok how to optimize it. */
40 int err[2];
41 err[0] = errno;
42 err[1] = errno;
43 errno = 0;
44 free (p);
45 errno = err[errno == 0];
46# else
47 int err = errno;
48 free (p);
49 errno = err;
50# endif
51}
52
53#endif