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/* Test string function in a transactionally executing RTM region.
Copyright (C) 2021-2025 Free Software Foundation, Inc.
This file is part of the GNU C Library.
The GNU C Library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
The GNU C Library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with the GNU C Library; if not, see
<https://www.gnu.org/licenses/>. */
#include <string.h>
#include <x86intrin.h>
#include <sys/platform/x86.h>
#include <support/check.h>
#include <support/test-driver.h>
static int
do_test_1 (const char *name, unsigned int loop, int (*prepare) (void),
int (*function) (void))
{
if (!CPU_FEATURE_ACTIVE (RTM))
return EXIT_UNSUPPORTED;
int status = prepare ();
if (status != EXIT_SUCCESS)
return status;
unsigned int i;
unsigned int naborts = 0;
unsigned int failed = 0;
for (i = 0; i < loop; i++)
{
failed |= function ();
if (_xbegin() == _XBEGIN_STARTED)
{
failed |= function ();
_xend();
}
else
{
failed |= function ();
++naborts;
}
}
if (failed)
FAIL_EXIT1 ("%s() failed", name);
if (naborts)
{
/* NB: Low single digit (<= 5%) noise-level aborts are normal for
TSX. */
double rate = 100 * ((double) naborts) / ((double) loop);
if (rate > 5)
FAIL_EXIT1 ("TSX abort rate: %.2f%% (%d out of %d)",
rate, naborts, loop);
}
return EXIT_SUCCESS;
}
static int do_test (void);
#include <support/test-driver.c>
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