gcc/tree-nomudflap.c

   1 /* Mudflap: narrow-pointer bounds-checking by tree rewriting.
   2    Copyright (C) 2001-2013 Free Software Foundation, Inc.
   3    Contributed by Frank Ch. Eigler <fche@redhat.com>
   4
   5 This file is part of GCC.
   6
   7 GCC is free software; you can redistribute it and/or modify it under
   8 the terms of the GNU General Public License as published by the Free
   9 Software Foundation; either version 3, or (at your option) any later
  10 version.
  11
  12 GCC is distributed in the hope that it will be useful, but WITHOUT ANY
  13 WARRANTY; without even the implied warranty of MERCHANTABILITY or
  14 FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  15 for more details.
  16
  17 You should have received a copy of the GNU General Public License
  18 along with GCC; see the file COPYING3.  If not see
  19 <http://www.gnu.org/licenses/>.  */
  20
  21
  22 #include "config.h"
  23 #include "system.h"
  24 #include "coretypes.h"
  25 #include "tm.h"
  26 #include "tree.h"
  27 #include "tree-inline.h"
  28 #include "gimple.h"
  29 #include "hashtab.h"
  30 #include "langhooks.h"
  31 #include "tree-mudflap.h"
  32 #include "tree-pass.h"
  33 #include "ggc.h"
  34 #include "diagnostic-core.h"
  35
  36
  37
  38 /* This file contains placeholder functions, to be used only for
  39    language processors that cannot handle tree-mudflap.c directly.
  40    (e.g. Fortran).  */
  41
  42 static void
  43 nogo (void)
  44 {
  45   sorry ("mudflap: this language is not supported");
  46 }
  47
  48 void
  49 mudflap_enqueue_decl (tree obj ATTRIBUTE_UNUSED)
  50 {
  51   nogo ();
  52 }
  53
  54 void
  55 mudflap_enqueue_constant (tree obj ATTRIBUTE_UNUSED)
  56 {
  57   nogo ();
  58 }
  59
  60 void
  61 mudflap_finish_file (void)
  62 {
  63   nogo ();
  64 }
  65
  66 int
  67 mf_marked_p (tree t ATTRIBUTE_UNUSED)
  68 {
  69   nogo ();
  70   return 0;
  71 }
  72
  73 tree
  74 mf_mark (tree t ATTRIBUTE_UNUSED)
  75 {
  76   nogo ();
  77   return NULL;
  78 }
  79
  80 /* The pass structures must exist, but need not do anything.  */
  81
  82 static bool
  83 gate_mudflap (void)
  84 {
  85   return flag_mudflap != 0;
  86 }
  87
  88 namespace {
  89
  90 const pass_data pass_data_mudflap_1 =
  91 {
  92   GIMPLE_PASS, /* type */
  93   "mudflap1", /* name */
  94   OPTGROUP_NONE, /* optinfo_flags */
  95   true, /* has_gate */
  96   false, /* has_execute */
  97   TV_NONE, /* tv_id */
  98   0, /* properties_required */
  99   0, /* properties_provided */
 100   0, /* properties_destroyed */
 101   0, /* todo_flags_start */
 102   0, /* todo_flags_finish */
 103 };
 104
 105 class pass_mudflap_1 : public gimple_opt_pass
 106 {
 107 public:
 108   pass_mudflap_1(gcc::context *ctxt)
 109     : gimple_opt_pass(pass_data_mudflap_1, ctxt)
 110   {}
 111
 112   /* opt_pass methods: */
 113   bool gate () { return gate_mudflap (); }
 114
 115 }; // class pass_mudflap_1
 116
 117 } // anon namespace
 118
 119 gimple_opt_pass *
 120 make_pass_mudflap_1 (gcc::context *ctxt)
 121 {
 122   return new pass_mudflap_1 (ctxt);
 123 }
 124
 125 namespace {
 126
 127 const pass_data pass_data_mudflap_2 =
 128 {
 129   GIMPLE_PASS, /* type */
 130   "mudflap2", /* name */
 131   OPTGROUP_NONE, /* optinfo_flags */
 132   true, /* has_gate */
 133   false, /* has_execute */
 134   TV_NONE, /* tv_id */
 135   0, /* properties_required */
 136   0, /* properties_provided */
 137   0, /* properties_destroyed */
 138   0, /* todo_flags_start */
 139   0, /* todo_flags_finish */
 140 };
 141
 142 class pass_mudflap_2 : public gimple_opt_pass
 143 {
 144 public:
 145   pass_mudflap_2(gcc::context *ctxt)
 146     : gimple_opt_pass(pass_data_mudflap_2, ctxt)
 147   {}
 148
 149   /* opt_pass methods: */
 150   bool gate () { return gate_mudflap (); }
 151
 152 }; // class pass_mudflap_2
 153
 154 } // anon namespace
 155
 156 gimple_opt_pass *
 157 make_pass_mudflap_2 (gcc::context *ctxt)
 158 {
 159   return new pass_mudflap_2 (ctxt);
 160 }
 161
 162 /* Instead of:
 163 #include "gt-tree-mudflap.h"
 164 We prepare a little dummy struct here.
 165 */
 166
 167 EXPORTED_CONST struct ggc_root_tab gt_ggc_r_gt_tree_mudflap_h[] = {
 168   LAST_GGC_ROOT_TAB
 169 };