gdb/testsuite/gdb.arch/i386-mpx-map.c

   1 /* Test program for MPX map allocated bounds.
   2
   3    Copyright 2015-2017 Free Software Foundation, Inc.
   4
   5    Contributed by Intel Corp. <walfred.tedeschi@intel.com>
   6                               <mircea.gherzan@intel.com>
   7
   8    This file is part of GDB.
   9
  10    This program is free software; you can redistribute it and/or modify
  11    it under the terms of the GNU General Public License as published by
  12    the Free Software Foundation; either version 3 of the License, or
  13    (at your option) any later version.
  14
  15    This program is distributed in the hope that it will be useful,
  16    but WITHOUT ANY WARRANTY; without even the implied warranty of
  17    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  18    GNU General Public License for more details.
  19
  20    You should have received a copy of the GNU General Public License
  21    along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
  22
  23 #include <stdlib.h>
  24 #include "x86-cpuid.h"
  25
  26 #ifndef NOINLINE
  27 #define NOINLINE __attribute__ ((noinline))
  28 #endif
  29
  30 #define SIZE  5
  31
  32 typedef int T;
  33
  34 unsigned int have_mpx (void) NOINLINE;
  35
  36 unsigned int NOINLINE
  37 have_mpx (void)
  38 {
  39   unsigned int eax, ebx, ecx, edx;
  40
  41   if (!__get_cpuid (1, &eax, &ebx, &ecx, &edx))
  42     return 0;
  43
  44   if ((ecx & bit_OSXSAVE) == bit_OSXSAVE)
  45     {
  46       if (__get_cpuid_max (0, NULL) < 7)
  47         return 0;
  48
  49       __cpuid_count (7, 0, eax, ebx, ecx, edx);
  50
  51       if ((ebx & bit_MPX) == bit_MPX)
  52         return 1;
  53       else
  54         return 0;
  55     }
  56   return 0;
  57 }
  58
  59 void
  60 foo (T *p)
  61 {
  62   T *x;
  63
  64 #if defined  __GNUC__ && !defined __INTEL_COMPILER
  65   __bnd_store_ptr_bounds (p, &p);
  66 #endif
  67
  68   x = p + SIZE - 1;
  69
  70 #if defined  __GNUC__ && !defined __INTEL_COMPILER
  71   __bnd_store_ptr_bounds (x, &x);
  72 #endif
  73   /* Dummy assign.  */
  74   x = x + 1;                    /* after-assign */
  75   return;
  76 }
  77
  78 int
  79 main (void)
  80 {
  81   if (have_mpx ())
  82     {
  83       T *a = NULL;
  84
  85       a = calloc (SIZE, sizeof (T));    /* after-decl */
  86 #if defined  __GNUC__ && !defined __INTEL_COMPILER
  87       __bnd_store_ptr_bounds (a, &a);
  88 #endif
  89
  90       foo (a);                          /* after-alloc */
  91       free (a);
  92     }
  93   return 0;
  94 }