libvtv/vtv_utils.h

   1 /* Copyright (C) 2012-2021 Free Software Foundation, Inc.
   2
   3    This file is part of GCC.
   4
   5    GCC is free software; you can redistribute it and/or modify
   6    it under the terms of the GNU General Public License as published by
   7    the Free Software Foundation; either version 3, or (at your option)
   8    any later version.
   9
  10    GCC 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
  13    GNU General Public License for more details.
  14
  15    Under Section 7 of GPL version 3, you are granted additional
  16    permissions described in the GCC Runtime Library Exception, version
  17    3.1, as published by the Free Software Foundation.
  18
  19    You should have received a copy of the GNU General Public License and
  20    a copy of the GCC Runtime Library Exception along with this program;
  21    see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see
  22    <http://www.gnu.org/licenses/>.  */
  23
  24 #ifndef _VTV_UTILS_H
  25 #define _VTV_UTILS_H 1
  26
  27 #include <stdlib.h>
  28 #include "../include/vtv-change-permission.h"
  29
  30 static inline void
  31 VTV_not_an_error (void)
  32 {
  33 }
  34
  35 /* Handler for verification runtime errors.  */
  36 #define VTV_error abort
  37
  38 /* Assertion macros used in vtable verification runtime.  */
  39 #define VTV_ASSERT(EXPR) \
  40   if (!(EXPR)) VTV_error();
  41
  42 #ifdef VTV_DEBUG
  43 #define VTV_DEBUG_ASSERT(EXPR) \
  44                       ((bool) (!(EXPR)) ? VTV_error() : (void) 0)
  45 #else
  46 #define VTV_DEBUG_ASSERT(EXPR) ((void) 0)
  47 #endif
  48
  49 /* Name of the section where we put general VTV variables for protection */
  50 #define VTV_PROTECTED_VARS_SECTION ".vtable_map_vars"
  51 #define VTV_PROTECTED_VAR \
  52                        __attribute__ ((section (VTV_PROTECTED_VARS_SECTION)))
  53
  54 /* The following logging routines try to use low level file access
  55    routines and avoid calling malloc. We need this so that we dont
  56    disturb the order of calls to dlopen.  Changing the order of dlopen
  57    calls may lead to deadlocks */
  58 int __vtv_open_log (const char * name);
  59 int __vtv_add_to_log (int log, const char * format, ...);
  60 void __vtv_log_verification_failure (const char *, bool);
  61
  62 #endif /* VTV_UTILS_H */