math/test-nan-overflow.c

   1 /* Test nan functions stack overflow (bug 16962).
   2    Copyright (C) 2015-2016 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    <http://www.gnu.org/licenses/>.  */
  18
  19 #include <math.h>
  20 #include <stdio.h>
  21 #include <string.h>
  22 #include <sys/resource.h>
  23
  24 #define STACK_LIM 1048576
  25 #define STRING_SIZE (2 * STACK_LIM)
  26
  27 static int
  28 do_test (void)
  29 {
  30   int result = 0;
  31   struct rlimit lim;
  32   getrlimit (RLIMIT_STACK, &lim);
  33   lim.rlim_cur = STACK_LIM;
  34   setrlimit (RLIMIT_STACK, &lim);
  35   char *nanstr = malloc (STRING_SIZE);
  36   if (nanstr == NULL)
  37     {
  38       puts ("malloc failed, cannot test");
  39       return 77;
  40     }
  41   memset (nanstr, '0', STRING_SIZE - 1);
  42   nanstr[STRING_SIZE - 1] = 0;
  43 #define NAN_TEST(TYPE, FUNC)                    \
  44   do                                            \
  45     {                                           \
  46       char *volatile p = nanstr;                \
  47       volatile TYPE v = FUNC (p);               \
  48       if (isnan (v))                            \
  49         puts ("PASS: " #FUNC);                  \
  50       else                                      \
  51         {                                       \
  52           puts ("FAIL: " #FUNC);                \
  53           result = 1;                           \
  54         }                                       \
  55     }                                           \
  56   while (0)
  57   NAN_TEST (float, nanf);
  58   NAN_TEST (double, nan);
  59 #ifndef NO_LONG_DOUBLE
  60   NAN_TEST (long double, nanl);
  61 #endif
  62   return result;
  63 }
  64
  65 #define TEST_FUNCTION do_test ()
  66 #include "../test-skeleton.c"