gcc/ada/opt.adb

   1 ------------------------------------------------------------------------------
   2 --                                                                          --
   3 --                         GNAT COMPILER COMPONENTS                         --
   4 --                                                                          --
   5 --                                  O P T                                   --
   6 --                                                                          --
   7 --                                 B o d y                                  --
   8 --                                                                          --
   9 --          Copyright (C) 1992-2007, Free Software Foundation, Inc.         --
  10 --                                                                          --
  11 -- GNAT is free software;  you can  redistribute it  and/or modify it under --
  12 -- terms of the  GNU General Public License as published  by the Free Soft- --
  13 -- ware  Foundation;  either version 2,  or (at your option) any later ver- --
  14 -- sion.  GNAT is distributed in the hope that it will be useful, but WITH- --
  15 -- OUT ANY WARRANTY;  without even the  implied warranty of MERCHANTABILITY --
  16 -- or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License --
  17 -- for  more details.  You should have  received  a copy of the GNU General --
  18 -- Public License  distributed with GNAT;  see file COPYING.  If not, write --
  19 -- to  the  Free Software Foundation,  51  Franklin  Street,  Fifth  Floor, --
  20 -- Boston, MA 02110-1301, USA.                                              --
  21 --                                                                          --
  22 -- As a special exception,  if other files  instantiate  generics from this --
  23 -- unit, or you link  this unit with other files  to produce an executable, --
  24 -- this  unit  does not  by itself cause  the resulting  executable  to  be --
  25 -- covered  by the  GNU  General  Public  License.  This exception does not --
  26 -- however invalidate  any other reasons why  the executable file  might be --
  27 -- covered by the  GNU Public License.                                      --
  28 --                                                                          --
  29 -- GNAT was originally developed  by the GNAT team at  New York University. --
  30 -- Extensive contributions were provided by Ada Core Technologies Inc.      --
  31 --                                                                          --
  32 ------------------------------------------------------------------------------
  33
  34 with Gnatvsn; use Gnatvsn;
  35 with System;  use System;
  36 with Tree_IO; use Tree_IO;
  37
  38 package body Opt is
  39
  40    SU : constant := Storage_Unit;
  41    --  Shorthand for System.Storage_Unit
  42
  43    ----------------------------------
  44    -- Register_Opt_Config_Switches --
  45    ----------------------------------
  46
  47    procedure Register_Opt_Config_Switches is
  48    begin
  49       Ada_Version_Config                    := Ada_Version;
  50       Ada_Version_Explicit_Config           := Ada_Version_Explicit;
  51       Assertions_Enabled_Config             := Assertions_Enabled;
  52       Debug_Pragmas_Enabled_Config          := Debug_Pragmas_Enabled;
  53       Dynamic_Elaboration_Checks_Config     := Dynamic_Elaboration_Checks;
  54       Exception_Locations_Suppressed_Config := Exception_Locations_Suppressed;
  55       Extensions_Allowed_Config             := Extensions_Allowed;
  56       External_Name_Exp_Casing_Config       := External_Name_Exp_Casing;
  57       External_Name_Imp_Casing_Config       := External_Name_Imp_Casing;
  58       Persistent_BSS_Mode_Config            := Persistent_BSS_Mode;
  59       Polling_Required_Config               := Polling_Required;
  60       Use_VADS_Size_Config                  := Use_VADS_Size;
  61    end Register_Opt_Config_Switches;
  62
  63    ---------------------------------
  64    -- Restore_Opt_Config_Switches --
  65    ---------------------------------
  66
  67    procedure Restore_Opt_Config_Switches (Save : Config_Switches_Type) is
  68    begin
  69       Ada_Version                    := Save.Ada_Version;
  70       Ada_Version_Explicit           := Save.Ada_Version_Explicit;
  71       Assertions_Enabled             := Save.Assertions_Enabled;
  72       Debug_Pragmas_Enabled          := Save.Debug_Pragmas_Enabled;
  73       Dynamic_Elaboration_Checks     := Save.Dynamic_Elaboration_Checks;
  74       Exception_Locations_Suppressed := Save.Exception_Locations_Suppressed;
  75       Extensions_Allowed             := Save.Extensions_Allowed;
  76       External_Name_Exp_Casing       := Save.External_Name_Exp_Casing;
  77       External_Name_Imp_Casing       := Save.External_Name_Imp_Casing;
  78       Persistent_BSS_Mode            := Save.Persistent_BSS_Mode;
  79       Polling_Required               := Save.Polling_Required;
  80       Use_VADS_Size                  := Save.Use_VADS_Size;
  81    end Restore_Opt_Config_Switches;
  82
  83    ------------------------------
  84    -- Save_Opt_Config_Switches --
  85    ------------------------------
  86
  87    procedure Save_Opt_Config_Switches (Save : out Config_Switches_Type) is
  88    begin
  89       Save.Ada_Version                    := Ada_Version;
  90       Save.Ada_Version_Explicit           := Ada_Version_Explicit;
  91       Save.Assertions_Enabled             := Assertions_Enabled;
  92       Save.Debug_Pragmas_Enabled          := Debug_Pragmas_Enabled;
  93       Save.Dynamic_Elaboration_Checks     := Dynamic_Elaboration_Checks;
  94       Save.Exception_Locations_Suppressed := Exception_Locations_Suppressed;
  95       Save.Extensions_Allowed             := Extensions_Allowed;
  96       Save.External_Name_Exp_Casing       := External_Name_Exp_Casing;
  97       Save.External_Name_Imp_Casing       := External_Name_Imp_Casing;
  98       Save.Persistent_BSS_Mode            := Persistent_BSS_Mode;
  99       Save.Polling_Required               := Polling_Required;
 100       Save.Use_VADS_Size                  := Use_VADS_Size;
 101    end Save_Opt_Config_Switches;
 102
 103    -----------------------------
 104    -- Set_Opt_Config_Switches --
 105    -----------------------------
 106
 107    procedure Set_Opt_Config_Switches
 108      (Internal_Unit : Boolean;
 109       Main_Unit     : Boolean)
 110    is
 111    begin
 112       --  Case of internal unit
 113
 114       if Internal_Unit then
 115
 116          --  Set standard switches. Note we do NOT set Ada_Version_Explicit
 117          --  since the whole point of this is that it still properly indicates
 118          --  the configuration setting even in a run time unit.
 119
 120          Ada_Version                := Ada_Version_Runtime;
 121          Dynamic_Elaboration_Checks := False;
 122          Extensions_Allowed         := True;
 123          External_Name_Exp_Casing   := As_Is;
 124          External_Name_Imp_Casing   := Lowercase;
 125          Persistent_BSS_Mode        := False;
 126          Use_VADS_Size              := False;
 127
 128          --  For an internal unit, assertions/debug pragmas are off unless this
 129          --  is the main unit and they were explicitly enabled.
 130
 131          if Main_Unit then
 132             Assertions_Enabled    := Assertions_Enabled_Config;
 133             Debug_Pragmas_Enabled := Debug_Pragmas_Enabled_Config;
 134          else
 135             Assertions_Enabled    := False;
 136             Debug_Pragmas_Enabled := False;
 137          end if;
 138
 139       --  Case of non-internal unit
 140
 141       else
 142          Ada_Version                := Ada_Version_Config;
 143          Ada_Version_Explicit       := Ada_Version_Explicit_Config;
 144          Assertions_Enabled         := Assertions_Enabled_Config;
 145          Debug_Pragmas_Enabled      := Debug_Pragmas_Enabled_Config;
 146          Dynamic_Elaboration_Checks := Dynamic_Elaboration_Checks_Config;
 147          Extensions_Allowed         := Extensions_Allowed_Config;
 148          External_Name_Exp_Casing   := External_Name_Exp_Casing_Config;
 149          External_Name_Imp_Casing   := External_Name_Imp_Casing_Config;
 150          Persistent_BSS_Mode        := Persistent_BSS_Mode_Config;
 151          Use_VADS_Size              := Use_VADS_Size_Config;
 152       end if;
 153
 154       Exception_Locations_Suppressed := Exception_Locations_Suppressed_Config;
 155       Polling_Required               := Polling_Required_Config;
 156    end Set_Opt_Config_Switches;
 157
 158    ---------------
 159    -- Tree_Read --
 160    ---------------
 161
 162    procedure Tree_Read is
 163       Tree_Version_String_Len         : Nat;
 164       Ada_Version_Config_Val          : Nat;
 165       Ada_Version_Explicit_Config_Val : Nat;
 166       Assertions_Enabled_Config_Val   : Nat;
 167
 168    begin
 169       Tree_Read_Int  (Tree_ASIS_Version_Number);
 170       Tree_Read_Bool (Brief_Output);
 171       Tree_Read_Bool (GNAT_Mode);
 172       Tree_Read_Char (Identifier_Character_Set);
 173       Tree_Read_Int  (Maximum_File_Name_Length);
 174       Tree_Read_Data (Suppress_Options'Address,
 175                       (Suppress_Options'Size + SU - 1) / SU);
 176       Tree_Read_Bool (Verbose_Mode);
 177       Tree_Read_Data (Warning_Mode'Address,
 178                       (Warning_Mode'Size + SU - 1) / SU);
 179       Tree_Read_Int  (Ada_Version_Config_Val);
 180       Tree_Read_Int  (Ada_Version_Explicit_Config_Val);
 181       Tree_Read_Int  (Assertions_Enabled_Config_Val);
 182       Tree_Read_Bool (All_Errors_Mode);
 183       Tree_Read_Bool (Assertions_Enabled);
 184       Tree_Read_Bool (Debug_Pragmas_Enabled);
 185       Tree_Read_Bool (Enable_Overflow_Checks);
 186       Tree_Read_Bool (Full_List);
 187
 188       Ada_Version_Config :=
 189         Ada_Version_Type'Val (Ada_Version_Config_Val);
 190       Ada_Version_Explicit_Config :=
 191         Ada_Version_Type'Val (Ada_Version_Explicit_Config_Val);
 192       Assertions_Enabled_Config :=
 193         Boolean'Val (Assertions_Enabled_Config_Val);
 194
 195       --  Read version string: we have to get the length first
 196
 197       Tree_Read_Int (Tree_Version_String_Len);
 198
 199       declare
 200          Tmp : String (1 .. Integer (Tree_Version_String_Len));
 201       begin
 202          Tree_Read_Data
 203            (Tmp'Address, Tree_Version_String_Len);
 204          System.Strings.Free (Tree_Version_String);
 205          Free (Tree_Version_String);
 206          Tree_Version_String := new String'(Tmp);
 207       end;
 208
 209       Tree_Read_Data (Distribution_Stub_Mode'Address,
 210                       (Distribution_Stub_Mode'Size + SU - 1) / Storage_Unit);
 211       Tree_Read_Bool (Inline_Active);
 212       Tree_Read_Bool (Inline_Processing_Required);
 213       Tree_Read_Bool (List_Units);
 214       Tree_Read_Bool (Configurable_Run_Time_Mode);
 215       Tree_Read_Data (Operating_Mode'Address,
 216                       (Operating_Mode'Size + SU - 1) / Storage_Unit);
 217       Tree_Read_Bool (Suppress_Checks);
 218       Tree_Read_Bool (Try_Semantics);
 219       Tree_Read_Data (Wide_Character_Encoding_Method'Address,
 220                       (Wide_Character_Encoding_Method'Size + SU - 1) / SU);
 221       Tree_Read_Bool (Upper_Half_Encoding);
 222       Tree_Read_Bool (Force_ALI_Tree_File);
 223    end Tree_Read;
 224
 225    ----------------
 226    -- Tree_Write --
 227    ----------------
 228
 229    procedure Tree_Write is
 230       Version_String : String := Gnat_Version_String;
 231
 232    begin
 233       Tree_Write_Int  (ASIS_Version_Number);
 234       Tree_Write_Bool (Brief_Output);
 235       Tree_Write_Bool (GNAT_Mode);
 236       Tree_Write_Char (Identifier_Character_Set);
 237       Tree_Write_Int  (Maximum_File_Name_Length);
 238       Tree_Write_Data (Suppress_Options'Address,
 239                        (Suppress_Options'Size + SU - 1) / SU);
 240       Tree_Write_Bool (Verbose_Mode);
 241       Tree_Write_Data (Warning_Mode'Address,
 242                        (Warning_Mode'Size + SU - 1) / Storage_Unit);
 243       Tree_Write_Int  (Ada_Version_Type'Pos (Ada_Version_Config));
 244       Tree_Write_Int  (Ada_Version_Type'Pos (Ada_Version_Explicit_Config));
 245       Tree_Write_Int  (Boolean'Pos (Assertions_Enabled_Config));
 246       Tree_Write_Bool (All_Errors_Mode);
 247       Tree_Write_Bool (Assertions_Enabled);
 248       Tree_Write_Bool (Debug_Pragmas_Enabled);
 249       Tree_Write_Bool (Enable_Overflow_Checks);
 250       Tree_Write_Bool (Full_List);
 251       Tree_Write_Int  (Int (Version_String'Length));
 252       Tree_Write_Data (Version_String'Address, Version_String'Length);
 253       Tree_Write_Data (Distribution_Stub_Mode'Address,
 254                        (Distribution_Stub_Mode'Size + SU - 1) / SU);
 255       Tree_Write_Bool (Inline_Active);
 256       Tree_Write_Bool (Inline_Processing_Required);
 257       Tree_Write_Bool (List_Units);
 258       Tree_Write_Bool (Configurable_Run_Time_Mode);
 259       Tree_Write_Data (Operating_Mode'Address,
 260                        (Operating_Mode'Size + SU - 1) / SU);
 261       Tree_Write_Bool (Suppress_Checks);
 262       Tree_Write_Bool (Try_Semantics);
 263       Tree_Write_Data (Wide_Character_Encoding_Method'Address,
 264                        (Wide_Character_Encoding_Method'Size + SU - 1) / SU);
 265       Tree_Write_Bool (Upper_Half_Encoding);
 266       Tree_Write_Bool (Force_ALI_Tree_File);
 267    end Tree_Write;
 268
 269 end Opt;