sysdeps/x86_64/tst-rsi-strlen.c

   1 /* Test strlen with 0 in the RSI register.
   2    Copyright (C) 2021 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 #ifdef WIDE
  20 # define TEST_NAME "wcslen"
  21 #else
  22 # define TEST_NAME "strlen"
  23 #endif /* WIDE */
  24
  25 #define TEST_MAIN
  26 #include <string/test-string.h>
  27
  28 #ifdef WIDE
  29 # include <wchar.h>
  30 # define STRLEN wcslen
  31 # define CHAR wchar_t
  32 #else
  33 # define STRLEN strlen
  34 # define CHAR char
  35 #endif /* WIDE */
  36
  37 IMPL (STRLEN, 1)
  38
  39 typedef size_t (*proto_t) (const CHAR *);
  40
  41 typedef struct
  42 {
  43   void (*fn) (void);
  44 } parameter_t;
  45
  46 size_t
  47 __attribute__ ((weak, noinline, noclone))
  48 do_strlen (parameter_t *a, int zero, const CHAR *str)
  49 {
  50   return CALL (a, str);
  51 }
  52
  53 static int
  54 test_main (void)
  55 {
  56   test_init ();
  57
  58   size_t size = page_size / sizeof (CHAR) - 1;
  59   CHAR *buf = (CHAR *) buf2;
  60   buf[size] = 0;
  61
  62   parameter_t a;
  63
  64   int ret = 0;
  65   FOR_EACH_IMPL (impl, 0)
  66     {
  67       a.fn = impl->fn;
  68       /* NB: Pass 0 in RSI.  */
  69       size_t res = do_strlen (&a, 0, buf);
  70       if (res != size)
  71         {
  72           error (0, 0, "Wrong result in function %s: %zu != %zu",
  73                  impl->name, res, size);
  74           ret = 1;
  75         }
  76     }
  77
  78   return ret ? EXIT_FAILURE : EXIT_SUCCESS;
  79 }
  80
  81 #include <support/test-driver.c>