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3357087b2a
Fix a compilation error:
In function '__rawmemchr',
inlined from '__rawmemchr' at rawmemchr.c:27:1:
rawmemchr.c:36:12: error: 'memchr' specified bound 18446744073709551615 exceeds maximum object size 9223372036854775807 [-Werror=stringop-overread]
36 | return memchr (s, c, (size_t)-1);
| ^~~~~~~~~~~~~~~~~~~~~~~~~
cc1: all warnings being treated as errors
../o-iterator.mk:9: recipe for target '.../string/rawmemchr.o' failed
introduced with GCC 11 commit d14c547abd48 ("Add -Wstringop-overread
for reading past the end by string functions.").
46 lines
1.5 KiB
C
46 lines
1.5 KiB
C
/* Copyright (C) 1991-2020 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with the GNU C Library; if not, see
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<https://www.gnu.org/licenses/>. */
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#include <string.h>
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#include <libc-diag.h>
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#ifndef RAWMEMCHR
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# define RAWMEMCHR __rawmemchr
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#endif
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/* Find the first occurrence of C in S. */
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void *
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RAWMEMCHR (const void *s, int c)
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{
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DIAG_PUSH_NEEDS_COMMENT;
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#if __GNUC_PREREQ (7, 0)
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/* GCC 8 warns about the size passed to memchr being larger than
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PTRDIFF_MAX; the use of SIZE_MAX is deliberate here. */
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DIAG_IGNORE_NEEDS_COMMENT (8, "-Wstringop-overflow=");
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#endif
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#if __GNUC_PREREQ (11, 0)
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/* Likewise GCC 11, with a different warning option. */
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DIAG_IGNORE_NEEDS_COMMENT (11, "-Wstringop-overread");
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#endif
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if (c != '\0')
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return memchr (s, c, (size_t)-1);
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DIAG_POP_NEEDS_COMMENT;
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return (char *)s + strlen (s);
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}
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libc_hidden_def (__rawmemchr)
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weak_alias (__rawmemchr, rawmemchr)
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