1 /* Test string function in a transactionally executing RTM region.
2 Copyright (C) 2021-2022 Free Software Foundation, Inc.
3 This file is part of the GNU C Library.
4
5 The GNU C Library is free software; you can redistribute it and/or
6 modify it under the terms of the GNU Lesser General Public
7 License as published by the Free Software Foundation; either
8 version 2.1 of the License, or (at your option) any later version.
9
10 The GNU C Library 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 GNU
13 Lesser General Public License for more details.
14
15 You should have received a copy of the GNU Lesser General Public
16 License along with the GNU C Library; if not, see
17 <https://www.gnu.org/licenses/>. */
18
19 #include <string.h>
20 #include <x86intrin.h>
21 #include <sys/platform/x86.h>
22 #include <support/check.h>
23 #include <support/test-driver.h>
24
25 static int
do_test_1(const char * name,unsigned int loop,int (* prepare)(void),int (* function)(void))26 do_test_1 (const char *name, unsigned int loop, int (*prepare) (void),
27 int (*function) (void))
28 {
29 if (!CPU_FEATURE_ACTIVE (RTM))
30 return EXIT_UNSUPPORTED;
31
32 int status = prepare ();
33 if (status != EXIT_SUCCESS)
34 return status;
35
36 unsigned int i;
37 unsigned int naborts = 0;
38 unsigned int failed = 0;
39 for (i = 0; i < loop; i++)
40 {
41 failed |= function ();
42 if (_xbegin() == _XBEGIN_STARTED)
43 {
44 failed |= function ();
45 _xend();
46 }
47 else
48 {
49 failed |= function ();
50 ++naborts;
51 }
52 }
53
54 if (failed)
55 FAIL_EXIT1 ("%s() failed", name);
56
57 if (naborts)
58 {
59 /* NB: Low single digit (<= 5%) noise-level aborts are normal for
60 TSX. */
61 double rate = 100 * ((double) naborts) / ((double) loop);
62 if (rate > 5)
63 FAIL_EXIT1 ("TSX abort rate: %.2f%% (%d out of %d)",
64 rate, naborts, loop);
65 }
66
67 return EXIT_SUCCESS;
68 }
69
70 static int do_test (void);
71
72 #include <support/test-driver.c>
73