sysdeps/x86/tst-strncmp-rtm.c

   1 /* Test case for strncmp inside a transactionally executing RTM region.
   2    Copyright (C) 2021-2024 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 <stdint.h>
  20 #include <tst-string-rtm.h>
  21
  22 #ifdef WIDE
  23 # define CHAR wchar_t
  24 # define MEMSET wmemset
  25 # define STRNCMP wcsncmp
  26 # define TEST_NAME "wcsncmp"
  27 #else /* !WIDE */
  28 # define CHAR char
  29 # define MEMSET memset
  30 # ifndef STRNCMP
  31 #  define STRNCMP strncmp
  32 #  define TEST_NAME "strncmp"
  33 # endif
  34 #endif /* !WIDE */
  35
  36
  37
  38 #define LOOP 3000
  39 #define STRING_SIZE 1024
  40 CHAR string1[STRING_SIZE];
  41 CHAR string2[STRING_SIZE];
  42
  43 __attribute__ ((noinline, noclone))
  44 static int
  45 prepare (void)
  46 {
  47   MEMSET (string1, 'a', STRING_SIZE - 1);
  48   MEMSET (string2, 'a', STRING_SIZE - 1);
  49   if (STRNCMP (string1, string2, STRING_SIZE) == 0)
  50     return EXIT_SUCCESS;
  51   else
  52     return EXIT_FAILURE;
  53 }
  54
  55 __attribute__ ((noinline, noclone))
  56 static int
  57 function (void)
  58 {
  59   if (STRNCMP (string1, string2, STRING_SIZE) == 0)
  60     return 0;
  61   else
  62     return 1;
  63 }
  64
  65 __attribute__ ((noinline, noclone))
  66 static int
  67 function_overflow (void)
  68 {
  69   if (STRNCMP (string1, string2, SIZE_MAX) == 0)
  70     return 0;
  71   else
  72     return 1;
  73 }
  74
  75 __attribute__ ((noinline, noclone))
  76 static int
  77 function_overflow2 (void)
  78 {
  79   if (STRNCMP (string1, string2, SIZE_MAX >> 4) == 0)
  80     return 0;
  81   else
  82     return 1;
  83 }
  84
  85 static int
  86 do_test (void)
  87 {
  88   int status = do_test_1 (TEST_NAME, LOOP, prepare, function);
  89   if (status != EXIT_SUCCESS)
  90     return status;
  91   status = do_test_1 (TEST_NAME, LOOP, prepare, function_overflow);
  92   if (status != EXIT_SUCCESS)
  93     return status;
  94   status = do_test_1 (TEST_NAME, LOOP, prepare, function_overflow2);
  95   if (status != EXIT_SUCCESS)
  96     return status;
  97   return status;
  98 }