2013-06-04 19:18:56 +08:00
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/* Measure strncmp functions.
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2020-01-01 08:14:33 +08:00
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Copyright (C) 2013-2020 Free Software Foundation, Inc.
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2013-06-04 19:18:56 +08:00
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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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Prefer https to http for gnu.org and fsf.org URLs
Also, change sources.redhat.com to sourceware.org.
This patch was automatically generated by running the following shell
script, which uses GNU sed, and which avoids modifying files imported
from upstream:
sed -ri '
s,(http|ftp)(://(.*\.)?(gnu|fsf|sourceware)\.org($|[^.]|\.[^a-z])),https\2,g
s,(http|ftp)(://(.*\.)?)sources\.redhat\.com($|[^.]|\.[^a-z]),https\2sourceware.org\4,g
' \
$(find $(git ls-files) -prune -type f \
! -name '*.po' \
! -name 'ChangeLog*' \
! -path COPYING ! -path COPYING.LIB \
! -path manual/fdl-1.3.texi ! -path manual/lgpl-2.1.texi \
! -path manual/texinfo.tex ! -path scripts/config.guess \
! -path scripts/config.sub ! -path scripts/install-sh \
! -path scripts/mkinstalldirs ! -path scripts/move-if-change \
! -path INSTALL ! -path locale/programs/charmap-kw.h \
! -path po/libc.pot ! -path sysdeps/gnu/errlist.c \
! '(' -name configure \
-execdir test -f configure.ac -o -f configure.in ';' ')' \
! '(' -name preconfigure \
-execdir test -f preconfigure.ac ';' ')' \
-print)
and then by running 'make dist-prepare' to regenerate files built
from the altered files, and then executing the following to cleanup:
chmod a+x sysdeps/unix/sysv/linux/riscv/configure
# Omit irrelevant whitespace and comment-only changes,
# perhaps from a slightly-different Autoconf version.
git checkout -f \
sysdeps/csky/configure \
sysdeps/hppa/configure \
sysdeps/riscv/configure \
sysdeps/unix/sysv/linux/csky/configure
# Omit changes that caused a pre-commit check to fail like this:
# remote: *** error: sysdeps/powerpc/powerpc64/ppc-mcount.S: trailing lines
git checkout -f \
sysdeps/powerpc/powerpc64/ppc-mcount.S \
sysdeps/unix/sysv/linux/s390/s390-64/syscall.S
# Omit change that caused a pre-commit check to fail like this:
# remote: *** error: sysdeps/sparc/sparc64/multiarch/memcpy-ultra3.S: last line does not end in newline
git checkout -f sysdeps/sparc/sparc64/multiarch/memcpy-ultra3.S
2019-09-07 13:40:42 +08:00
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<https://www.gnu.org/licenses/>. */
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2013-06-04 19:18:56 +08:00
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#define TEST_MAIN
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2015-08-26 16:26:22 +08:00
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#ifdef WIDE
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# define TEST_NAME "wcsncmp"
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#else
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# define TEST_NAME "strncmp"
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#endif /* !WIDE */
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2013-06-04 19:18:56 +08:00
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#include "bench-string.h"
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2018-03-06 20:59:34 +08:00
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#include "json-lib.h"
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2013-06-04 19:18:56 +08:00
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2015-08-26 16:26:22 +08:00
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#ifdef WIDE
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# define L(str) L##str
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2020-06-11 23:52:42 +08:00
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# define STRDUP wcsdup
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2015-08-26 16:26:22 +08:00
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# define SIMPLE_STRNCMP simple_wcsncmp
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2013-06-04 19:18:56 +08:00
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2015-08-26 16:26:22 +08:00
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/* Wcsncmp uses signed semantics for comparison, not unsigned.
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Avoid using substraction since possible overflow. */
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int
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simple_wcsncmp (const CHAR *s1, const CHAR *s2, size_t n)
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{
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wchar_t c1, c2;
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while (n--)
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{
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c1 = *s1++;
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c2 = *s2++;
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if (c1 == L ('\0') || c1 != c2)
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return c1 > c2 ? 1 : (c1 < c2 ? -1 : 0);
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}
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return 0;
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}
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#else
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# define L(str) str
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2020-06-11 23:52:42 +08:00
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# define STRDUP strdup
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2015-08-26 16:26:22 +08:00
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# define SIMPLE_STRNCMP simple_strncmp
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/* Strncmp uses unsigned semantics for comparison. */
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2013-06-04 19:18:56 +08:00
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int
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simple_strncmp (const char *s1, const char *s2, size_t n)
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{
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int ret = 0;
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while (n-- && (ret = *(unsigned char *) s1 - * (unsigned char *) s2++) == 0
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&& *s1++);
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return ret;
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}
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2015-08-26 16:26:22 +08:00
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#endif /* !WIDE */
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typedef int (*proto_t) (const CHAR *, const CHAR *, size_t);
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IMPL (SIMPLE_STRNCMP, 0)
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IMPL (STRNCMP, 1)
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2013-06-04 19:18:56 +08:00
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static void
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2018-03-06 20:59:34 +08:00
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do_one_test (json_ctx_t *json_ctx, impl_t *impl, const CHAR *s1, const CHAR
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*s2, size_t n, int exp_result)
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2013-06-04 19:18:56 +08:00
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{
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2019-06-28 20:42:36 +08:00
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size_t i, iters = INNER_LOOP_ITERS8;
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2013-09-02 21:13:50 +08:00
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timing_t start, stop, cur;
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TIMING_NOW (start);
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for (i = 0; i < iters; ++i)
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2013-06-04 19:18:56 +08:00
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{
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2013-09-02 21:13:50 +08:00
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CALL (impl, s1, s2, n);
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2013-06-04 19:18:56 +08:00
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}
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2013-09-02 21:13:50 +08:00
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TIMING_NOW (stop);
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TIMING_DIFF (cur, start, stop);
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2018-03-06 20:59:34 +08:00
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json_element_double (json_ctx, (double) cur / (double) iters);
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2013-06-04 19:18:56 +08:00
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}
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static void
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2018-03-06 20:59:34 +08:00
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do_test_limit (json_ctx_t *json_ctx, size_t align1, size_t align2, size_t len,
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size_t n, int max_char, int exp_result)
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2013-06-04 19:18:56 +08:00
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{
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size_t i, align_n;
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2015-08-26 16:26:22 +08:00
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CHAR *s1, *s2;
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2013-06-04 19:18:56 +08:00
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align1 &= 15;
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align2 &= 15;
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2015-08-26 16:26:22 +08:00
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align_n = (page_size - n * CHARBYTES) & 15;
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2013-06-04 19:18:56 +08:00
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2018-03-06 20:59:34 +08:00
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json_element_object_begin (json_ctx);
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json_attr_uint (json_ctx, "strlen", (double) len);
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json_attr_uint (json_ctx, "len", (double) n);
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json_attr_uint (json_ctx, "align1", (double) align1);
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json_attr_uint (json_ctx, "align2", (double) align2);
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json_array_begin (json_ctx, "timings");
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2013-06-04 19:18:56 +08:00
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FOR_EACH_IMPL (impl, 0)
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2018-03-06 20:59:52 +08:00
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{
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2018-08-08 03:14:56 +08:00
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alloc_bufs ();
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2018-03-06 20:59:52 +08:00
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s1 = (CHAR *) (buf1 + page_size - n * CHARBYTES);
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s2 = (CHAR *) (buf2 + page_size - n * CHARBYTES);
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if (align1 < align_n)
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s1 = (CHAR *) ((char *) s1 - (align_n - align1));
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if (align2 < align_n)
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s2 = (CHAR *) ((char *) s2 - (align_n - align2));
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for (i = 0; i < n; i++)
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s1[i] = s2[i] = 1 + 23 * i % max_char;
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if (len < n)
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{
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s1[len] = 0;
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s2[len] = 0;
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if (exp_result < 0)
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s2[len] = 32;
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else if (exp_result > 0)
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s1[len] = 64;
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}
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do_one_test (json_ctx, impl, s1, s2, n, exp_result);
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}
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2013-06-04 19:18:56 +08:00
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2018-03-06 20:59:34 +08:00
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json_array_end (json_ctx);
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json_element_object_end (json_ctx);
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2013-06-04 19:18:56 +08:00
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}
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static void
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2018-03-06 20:59:34 +08:00
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do_test (json_ctx_t *json_ctx, size_t align1, size_t align2, size_t len, size_t
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n, int max_char, int exp_result)
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2013-06-04 19:18:56 +08:00
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{
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size_t i;
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2015-08-26 16:26:22 +08:00
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CHAR *s1, *s2;
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2013-06-04 19:18:56 +08:00
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if (n == 0)
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return;
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2015-08-26 16:26:22 +08:00
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align1 &= 63;
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if (align1 + (n + 1) * CHARBYTES >= page_size)
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2013-06-04 19:18:56 +08:00
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return;
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align2 &= 7;
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2015-08-26 16:26:22 +08:00
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if (align2 + (n + 1) * CHARBYTES >= page_size)
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2013-06-04 19:18:56 +08:00
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return;
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2018-03-06 20:59:34 +08:00
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json_element_object_begin (json_ctx);
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json_attr_uint (json_ctx, "strlen", (double) len);
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json_attr_uint (json_ctx, "len", (double) n);
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json_attr_uint (json_ctx, "align1", (double) align1);
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json_attr_uint (json_ctx, "align2", (double) align2);
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json_array_begin (json_ctx, "timings");
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2013-06-04 19:18:56 +08:00
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FOR_EACH_IMPL (impl, 0)
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2018-03-06 20:59:52 +08:00
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{
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2018-08-08 03:14:56 +08:00
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alloc_bufs ();
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2018-03-06 20:59:52 +08:00
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s1 = (CHAR *) (buf1 + align1);
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s2 = (CHAR *) (buf2 + align2);
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for (i = 0; i < n; i++)
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s1[i] = s2[i] = 1 + (23 << ((CHARBYTES - 1) * 8)) * i % max_char;
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s1[n] = 24 + exp_result;
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s2[n] = 23;
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s1[len] = 0;
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s2[len] = 0;
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if (exp_result < 0)
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s2[len] = 32;
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else if (exp_result > 0)
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s1[len] = 64;
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if (len >= n)
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s2[n - 1] -= exp_result;
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do_one_test (json_ctx, impl, s1, s2, n, exp_result);
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}
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2013-06-04 19:18:56 +08:00
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2018-03-06 20:59:34 +08:00
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json_array_end (json_ctx);
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json_element_object_end (json_ctx);
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2013-06-04 19:18:56 +08:00
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}
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2020-06-11 23:52:42 +08:00
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static void
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do_one_test_page_boundary (json_ctx_t *json_ctx, CHAR *s1, CHAR *s2,
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size_t align1, size_t align2, size_t len,
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size_t n, int exp_result)
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{
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json_element_object_begin (json_ctx);
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json_attr_uint (json_ctx, "strlen", (double) len);
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json_attr_uint (json_ctx, "len", (double) n);
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json_attr_uint (json_ctx, "align1", (double) align1);
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json_attr_uint (json_ctx, "align2", (double) align2);
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json_array_begin (json_ctx, "timings");
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FOR_EACH_IMPL (impl, 0)
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do_one_test (json_ctx, impl, s1, s2, n, exp_result);
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json_array_end (json_ctx);
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json_element_object_end (json_ctx);
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}
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static void
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do_test_page_boundary (json_ctx_t *json_ctx)
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{
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/* To trigger bug 25933, we need a size that is equal to the vector
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length times 4. In the case of AVX2 for Intel, we need 32 * 4. We
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make this test generic and run it for all architectures as additional
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boundary testing for such related algorithms. */
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size_t size = 32 * 4;
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size_t len;
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CHAR *s1 = (CHAR *) (buf1 + (BUF1PAGES - 1) * page_size);
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CHAR *s2 = (CHAR *) (buf2 + (BUF1PAGES - 1) * page_size);
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int exp_result;
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memset (s1, 'a', page_size);
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memset (s2, 'a', page_size);
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s1[(page_size / CHARBYTES) - 1] = (CHAR) 0;
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/* Iterate over a size that is just below where we expect the bug to
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trigger up to the size we expect will trigger the bug e.g. [99-128].
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Likewise iterate the start of two strings between 30 and 31 bytes
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away from the boundary to simulate alignment changes. */
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for (size_t s = 99; s <= size; s++)
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for (size_t s1a = 30; s1a < 32; s1a++)
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for (size_t s2a = 30; s2a < 32; s2a++)
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{
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size_t align1 = (page_size / CHARBYTES - s) - s1a;
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size_t align2 = (page_size / CHARBYTES - s) - s2a;
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CHAR *s1p = s1 + align1;
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CHAR *s2p = s2 + align2;
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len = (page_size / CHARBYTES) - 1 - align1;
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exp_result = SIMPLE_STRNCMP (s1p, s2p, s);
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do_one_test_page_boundary (json_ctx, s1p, s2p, align1, align2,
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len, s, exp_result);
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}
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}
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static void
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do_one_test_page (json_ctx_t *json_ctx, size_t offset1, size_t offset2,
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CHAR *s2)
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{
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CHAR *s1;
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int exp_result;
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if (offset1 * CHARBYTES >= page_size
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|| offset2 * CHARBYTES >= page_size)
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return;
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s1 = (CHAR *) buf1;
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s1 += offset1;
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s2 += offset2;
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size_t len = (page_size / CHARBYTES) - offset1;
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exp_result= *s1;
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json_element_object_begin (json_ctx);
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json_attr_uint (json_ctx, "strlen", (double) len);
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json_attr_uint (json_ctx, "len", (double) page_size);
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json_attr_uint (json_ctx, "align1", (double) offset1);
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json_attr_uint (json_ctx, "align2", (double) offset2);
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json_array_begin (json_ctx, "timings");
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{
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FOR_EACH_IMPL (impl, 0)
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do_one_test (json_ctx, impl, s1, s2, page_size, -exp_result);
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}
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json_array_end (json_ctx);
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json_element_object_end (json_ctx);
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json_element_object_begin (json_ctx);
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json_attr_uint (json_ctx, "strlen", (double) len);
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json_attr_uint (json_ctx, "len", (double) page_size);
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json_attr_uint (json_ctx, "align1", (double) offset1);
|
|
|
|
json_attr_uint (json_ctx, "align2", (double) offset2);
|
|
|
|
json_array_begin (json_ctx, "timings");
|
|
|
|
{
|
|
|
|
FOR_EACH_IMPL (impl, 0)
|
|
|
|
do_one_test (json_ctx, impl, s1, s2, page_size, exp_result);
|
|
|
|
}
|
|
|
|
json_array_end (json_ctx);
|
|
|
|
json_element_object_end (json_ctx);
|
|
|
|
}
|
|
|
|
|
|
|
|
static void
|
|
|
|
do_test_page (json_ctx_t *json_ctx)
|
|
|
|
{
|
|
|
|
size_t i;
|
|
|
|
CHAR *s1, *s2;
|
|
|
|
|
|
|
|
s1 = (CHAR *) buf1;
|
|
|
|
/* Fill buf1 with 23. */
|
|
|
|
for (i = 0; i < (page_size / CHARBYTES) - 1; i++)
|
|
|
|
s1[i] = 23;
|
|
|
|
s1[i] = 0;
|
|
|
|
|
|
|
|
/* Make a copy of buf1. */
|
|
|
|
s2 = STRDUP (s1);
|
|
|
|
|
|
|
|
/* Test should terminate within the page boundary. */
|
|
|
|
for (i = 0; i < (108 / CHARBYTES); ++i)
|
|
|
|
do_one_test_page (json_ctx, ((page_size - 108) / CHARBYTES) + i,
|
|
|
|
((page_size - 1460) / CHARBYTES), s2);
|
|
|
|
|
|
|
|
free (s2);
|
|
|
|
}
|
|
|
|
|
2013-06-04 19:18:56 +08:00
|
|
|
int
|
|
|
|
test_main (void)
|
|
|
|
{
|
2018-03-06 20:59:34 +08:00
|
|
|
json_ctx_t json_ctx;
|
2013-06-04 19:18:56 +08:00
|
|
|
size_t i;
|
|
|
|
|
|
|
|
test_init ();
|
|
|
|
|
2018-03-06 20:59:34 +08:00
|
|
|
json_init (&json_ctx, 0, stdout);
|
|
|
|
|
|
|
|
json_document_begin (&json_ctx);
|
|
|
|
json_attr_string (&json_ctx, "timing_type", TIMING_TYPE);
|
|
|
|
|
|
|
|
json_attr_object_begin (&json_ctx, "functions");
|
|
|
|
json_attr_object_begin (&json_ctx, TEST_NAME);
|
|
|
|
json_attr_string (&json_ctx, "bench-variant", "default");
|
|
|
|
|
|
|
|
json_array_begin (&json_ctx, "ifuncs");
|
2013-06-04 19:18:56 +08:00
|
|
|
FOR_EACH_IMPL (impl, 0)
|
2018-03-06 20:59:34 +08:00
|
|
|
json_element_string (&json_ctx, impl->name);
|
|
|
|
json_array_end (&json_ctx);
|
|
|
|
|
|
|
|
json_array_begin (&json_ctx, "results");
|
2013-06-04 19:18:56 +08:00
|
|
|
|
|
|
|
for (i =0; i < 16; ++i)
|
|
|
|
{
|
2018-03-06 20:59:34 +08:00
|
|
|
do_test (&json_ctx, 0, 0, 8, i, 127, 0);
|
|
|
|
do_test (&json_ctx, 0, 0, 8, i, 127, -1);
|
|
|
|
do_test (&json_ctx, 0, 0, 8, i, 127, 1);
|
|
|
|
do_test (&json_ctx, i, i, 8, i, 127, 0);
|
|
|
|
do_test (&json_ctx, i, i, 8, i, 127, 1);
|
|
|
|
do_test (&json_ctx, i, i, 8, i, 127, -1);
|
|
|
|
do_test (&json_ctx, i, 2 * i, 8, i, 127, 0);
|
|
|
|
do_test (&json_ctx, 2 * i, i, 8, i, 127, 1);
|
|
|
|
do_test (&json_ctx, i, 3 * i, 8, i, 127, -1);
|
|
|
|
do_test (&json_ctx, 0, 0, 8, i, 255, 0);
|
|
|
|
do_test (&json_ctx, 0, 0, 8, i, 255, -1);
|
|
|
|
do_test (&json_ctx, 0, 0, 8, i, 255, 1);
|
|
|
|
do_test (&json_ctx, i, i, 8, i, 255, 0);
|
|
|
|
do_test (&json_ctx, i, i, 8, i, 255, 1);
|
|
|
|
do_test (&json_ctx, i, i, 8, i, 255, -1);
|
|
|
|
do_test (&json_ctx, i, 2 * i, 8, i, 255, 0);
|
|
|
|
do_test (&json_ctx, 2 * i, i, 8, i, 255, 1);
|
|
|
|
do_test (&json_ctx, i, 3 * i, 8, i, 255, -1);
|
2013-06-04 19:18:56 +08:00
|
|
|
}
|
|
|
|
|
|
|
|
for (i = 1; i < 8; ++i)
|
|
|
|
{
|
2018-03-06 20:59:34 +08:00
|
|
|
do_test (&json_ctx, 0, 0, 8 << i, 16 << i, 127, 0);
|
|
|
|
do_test (&json_ctx, 0, 0, 8 << i, 16 << i, 127, 1);
|
|
|
|
do_test (&json_ctx, 0, 0, 8 << i, 16 << i, 127, -1);
|
|
|
|
do_test (&json_ctx, 0, 0, 8 << i, 16 << i, 255, 0);
|
|
|
|
do_test (&json_ctx, 0, 0, 8 << i, 16 << i, 255, 1);
|
|
|
|
do_test (&json_ctx, 0, 0, 8 << i, 16 << i, 255, -1);
|
|
|
|
do_test (&json_ctx, 8 - i, 2 * i, 8 << i, 16 << i, 127, 0);
|
|
|
|
do_test (&json_ctx, 8 - i, 2 * i, 8 << i, 16 << i, 127, 1);
|
|
|
|
do_test (&json_ctx, 2 * i, i, 8 << i, 16 << i, 255, 0);
|
|
|
|
do_test (&json_ctx, 2 * i, i, 8 << i, 16 << i, 255, 1);
|
2013-06-04 19:18:56 +08:00
|
|
|
}
|
|
|
|
|
2018-03-06 20:59:34 +08:00
|
|
|
do_test_limit (&json_ctx, 4, 0, 21, 20, 127, 0);
|
|
|
|
do_test_limit (&json_ctx, 0, 4, 21, 20, 127, 0);
|
|
|
|
do_test_limit (&json_ctx, 8, 0, 25, 24, 127, 0);
|
|
|
|
do_test_limit (&json_ctx, 0, 8, 25, 24, 127, 0);
|
2013-06-04 19:18:56 +08:00
|
|
|
|
|
|
|
for (i = 0; i < 8; ++i)
|
|
|
|
{
|
2018-03-06 20:59:34 +08:00
|
|
|
do_test_limit (&json_ctx, 0, 0, 17 - i, 16 - i, 127, 0);
|
|
|
|
do_test_limit (&json_ctx, 0, 0, 17 - i, 16 - i, 255, 0);
|
|
|
|
do_test_limit (&json_ctx, 0, 0, 15 - i, 16 - i, 127, 0);
|
|
|
|
do_test_limit (&json_ctx, 0, 0, 15 - i, 16 - i, 127, 1);
|
|
|
|
do_test_limit (&json_ctx, 0, 0, 15 - i, 16 - i, 127, -1);
|
|
|
|
do_test_limit (&json_ctx, 0, 0, 15 - i, 16 - i, 255, 0);
|
|
|
|
do_test_limit (&json_ctx, 0, 0, 15 - i, 16 - i, 255, 1);
|
|
|
|
do_test_limit (&json_ctx, 0, 0, 15 - i, 16 - i, 255, -1);
|
2013-06-04 19:18:56 +08:00
|
|
|
}
|
|
|
|
|
2020-06-11 23:52:42 +08:00
|
|
|
do_test_page_boundary (&json_ctx);
|
|
|
|
do_test_page (&json_ctx);
|
|
|
|
|
2018-03-06 20:59:34 +08:00
|
|
|
json_array_end (&json_ctx);
|
|
|
|
json_attr_object_end (&json_ctx);
|
|
|
|
json_attr_object_end (&json_ctx);
|
|
|
|
json_document_end (&json_ctx);
|
|
|
|
|
2013-06-04 19:18:56 +08:00
|
|
|
return ret;
|
|
|
|
}
|
|
|
|
|
2016-12-17 01:35:06 +08:00
|
|
|
#include <support/test-driver.c>
|