-- --
-- B o d y --
-- --
--- $Revision$
--- --
--- Copyright (C) 1992-2001 Free Software Foundation, Inc. --
+-- Copyright (C) 1992-2009, Free Software Foundation, Inc. --
-- --
-- GNAT is free software; you can redistribute it and/or modify it under --
-- terms of the GNU General Public License as published by the Free Soft- --
--- ware Foundation; either version 2, or (at your option) any later ver- --
+-- ware Foundation; either version 3, or (at your option) any later ver- --
-- sion. GNAT is distributed in the hope that it will be useful, but WITH- --
-- OUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY --
-- or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License --
-- for more details. You should have received a copy of the GNU General --
--- Public License distributed with GNAT; see file COPYING. If not, write --
--- to the Free Software Foundation, 59 Temple Place - Suite 330, Boston, --
--- MA 02111-1307, USA. --
+-- Public License distributed with GNAT; see file COPYING3. If not, go to --
+-- http://www.gnu.org/licenses for a complete copy of the license. --
-- --
-- GNAT was originally developed by the GNAT team at New York University. --
--- It is now maintained by Ada Core Technologies Inc (http://www.gnat.com). --
+-- Extensive contributions were provided by Ada Core Technologies Inc. --
-- --
------------------------------------------------------------------------------
+with System.Strings; use System.Strings;
+
with Atree; use Atree;
with Checks;
with CStand;
with Debug; use Debug;
with Elists;
-with Exp_Ch11;
with Exp_Dbug;
+with Fmap;
with Fname.UF;
-with Hostparm; use Hostparm;
with Inline; use Inline;
with Lib; use Lib;
with Lib.Load; use Lib.Load;
with Nlists; use Nlists;
with Opt; use Opt;
with Osint;
-with Output; use Output;
with Par;
-with Rtsfind;
+with Prep;
+with Prepcomp;
+with Restrict; use Restrict;
+with Rident; use Rident;
+with Rtsfind; use Rtsfind;
+with Snames; use Snames;
with Sprint;
with Scn; use Scn;
with Sem; use Sem;
+with Sem_Aux;
with Sem_Ch8; use Sem_Ch8;
+with Sem_SCIL;
with Sem_Elab; use Sem_Elab;
with Sem_Prag; use Sem_Prag;
with Sem_Warn; use Sem_Warn;
with Sinfo; use Sinfo;
with Sinput; use Sinput;
with Sinput.L; use Sinput.L;
+with Targparm; use Targparm;
+with Tbuild; use Tbuild;
with Types; use Types;
procedure Frontend is
- Pragmas : List_Id;
- Prag : Node_Id;
-
- Save_Style_Check : constant Boolean := Opt.Style_Check;
- -- Save style check mode so it can be restored later
+ Config_Pragmas : List_Id;
+ -- Gather configuration pragmas
begin
- -- Carry out package initializations. These are initializations which
- -- might logically be performed at elaboration time, were it not for
- -- the fact that we may be doing things more than once in the big loop
- -- over files. Like elaboration, the order in which these calls are
- -- made is in some cases important. For example, Lib cannot be
- -- initialized until Namet, since it uses names table entries.
+ -- Carry out package initializations. These are initializations which might
+ -- logically be performed at elaboration time, were it not for the fact
+ -- that we may be doing things more than once in the big loop over files.
+ -- Like elaboration, the order in which these calls are made is in some
+ -- cases important. For example, Lib cannot be initialized before Namet,
+ -- since it uses names table entries.
Rtsfind.Initialize;
Atree.Initialize;
Nlists.Initialize;
Elists.Initialize;
Lib.Load.Initialize;
+ Sem_Aux.Initialize;
Sem_Ch8.Initialize;
+ Sem_Prag.Initialize;
Fname.UF.Initialize;
- Exp_Ch11.Initialize;
Checks.Initialize;
+ Sem_Warn.Initialize;
+ Prep.Initialize;
-- Create package Standard
CStand.Create_Standard;
- -- Read and process gnat.adc file if one is present
+ -- Check possible symbol definitions specified by -gnateD switches
- if Opt.Config_File then
+ Prepcomp.Process_Command_Line_Symbol_Definitions;
- -- We always analyze the gnat.adc file with style checks off,
- -- since we don't want a miscellaneous gnat.adc that is around
- -- to discombobulate intended -gnatg compilations.
+ -- If -gnatep= was specified, parse the preprocessing data file
- Opt.Style_Check := False;
+ if Preprocessing_Data_File /= null then
+ Name_Len := Preprocessing_Data_File'Length;
+ Name_Buffer (1 .. Name_Len) := Preprocessing_Data_File.all;
+ Prepcomp.Parse_Preprocessing_Data_File (Name_Find);
- -- Capture current suppress options, which may get modified
+ -- Otherwise, check if there were preprocessing symbols on the command
+ -- line and set preprocessing if there are.
- Scope_Suppress := Opt.Suppress_Options;
+ else
+ Prepcomp.Check_Symbols;
+ end if;
- Name_Buffer (1 .. 8) := "gnat.adc";
- Name_Len := 8;
- Source_gnat_adc := Load_Config_File (Name_Enter);
+ -- Now that the preprocessing situation is established, we are able to
+ -- load the main source (this is no longer done by Lib.Load.Initialize).
- if Source_gnat_adc /= No_Source_File then
- Initialize_Scanner (No_Unit, Source_gnat_adc);
- Pragmas := Par (Configuration_Pragmas => True);
+ Lib.Load.Load_Main_Source;
- if Pragmas /= Error_List
- and then Operating_Mode /= Check_Syntax
- then
- Prag := First (Pragmas);
- while Present (Prag) loop
- Analyze_Pragma (Prag);
- Next (Prag);
- end loop;
- end if;
- end if;
+ -- Return immediately if the main source could not be parsed
- -- Restore style check, but if gnat.adc turned on checks, leave on!
+ if Sinput.Main_Source_File = No_Source_File then
+ return;
+ end if;
- Opt.Style_Check := Save_Style_Check or Style_Check;
+ -- Read and process configuration pragma files if present
- -- Capture any modifications to suppress options from config pragmas
+ declare
+ Save_Style_Check : constant Boolean := Opt.Style_Check;
+ -- Save style check mode so it can be restored later
- Opt.Suppress_Options := Scope_Suppress;
- end if;
+ Source_Config_File : Source_File_Index;
+ -- Source reference for -gnatec configuration file
- -- Read and process the configuration pragmas file if one is present
+ Prag : Node_Id;
- if Config_File_Name /= null then
+ begin
+ -- We always analyze config files with style checks off, since
+ -- we don't want a miscellaneous gnat.adc that is around to
+ -- discombobulate intended -gnatg or -gnaty compilations. We
+ -- also disconnect checking for maximum line length.
- declare
- New_Pragmas : List_Id;
- Style_Check_Saved : constant Boolean := Opt.Style_Check;
- Source_Config_File : Source_File_Index := No_Source_File;
+ Opt.Style_Check := False;
+ Style_Check := False;
- begin
- -- We always analyze the config pragmas file with style checks off,
- -- since we don't want it to discombobulate intended
- -- -gnatg compilations.
+ -- Capture current suppress options, which may get modified
- Opt.Style_Check := False;
+ Scope_Suppress := Opt.Suppress_Options;
- -- Capture current suppress options, which may get modified
+ -- First deal with gnat.adc file
- Scope_Suppress := Opt.Suppress_Options;
+ if Opt.Config_File then
+ Name_Buffer (1 .. 8) := "gnat.adc";
+ Name_Len := 8;
+ Source_gnat_adc := Load_Config_File (Name_Enter);
- Name_Buffer (1 .. Config_File_Name'Length) := Config_File_Name.all;
- Name_Len := Config_File_Name'Length;
- Source_Config_File := Load_Config_File (Name_Enter);
+ if Source_gnat_adc /= No_Source_File then
+ Initialize_Scanner (No_Unit, Source_gnat_adc);
+ Config_Pragmas := Par (Configuration_Pragmas => True);
- if Source_Config_File = No_Source_File then
- Osint.Fail
- ("cannot find configuration pragmas file ",
- Config_File_Name.all);
+ else
+ Config_Pragmas := Empty_List;
end if;
- Initialize_Scanner (No_Unit, Source_Config_File);
- New_Pragmas := Par (Configuration_Pragmas => True);
+ else
+ Config_Pragmas := Empty_List;
+ end if;
- if New_Pragmas /= Error_List
- and then Operating_Mode /= Check_Syntax
- then
- Prag := First (New_Pragmas);
- while Present (Prag) loop
+ -- Now deal with specified config pragmas files if there are any
+
+ if Opt.Config_File_Names /= null then
+ for Index in Opt.Config_File_Names'Range loop
+ Name_Len := Config_File_Names (Index)'Length;
+ Name_Buffer (1 .. Name_Len) := Config_File_Names (Index).all;
+ Source_Config_File := Load_Config_File (Name_Enter);
+
+ if Source_Config_File = No_Source_File then
+ Osint.Fail
+ ("cannot find configuration pragmas file "
+ & Config_File_Names (Index).all);
+ end if;
+
+ Initialize_Scanner (No_Unit, Source_Config_File);
+ Append_List_To
+ (Config_Pragmas, Par (Configuration_Pragmas => True));
+ end loop;
+ end if;
+
+ -- Now analyze all pragmas except those whose analysis must be
+ -- deferred till after the main unit is analyzed.
+
+ if Config_Pragmas /= Error_List
+ and then Operating_Mode /= Check_Syntax
+ then
+ Prag := First (Config_Pragmas);
+ while Present (Prag) loop
+ if not Delay_Config_Pragma_Analyze (Prag) then
Analyze_Pragma (Prag);
- Next (Prag);
- end loop;
- end if;
+ end if;
- -- Restore style check, but if the config pragmas file
- -- turned on checks, leave on!
+ Next (Prag);
+ end loop;
+ end if;
- Opt.Style_Check := Style_Check_Saved or Style_Check;
+ -- Restore style check, but if config file turned on checks, leave on!
- -- Capture any modifications to suppress options from config pragmas
+ Opt.Style_Check := Save_Style_Check or Style_Check;
- Opt.Suppress_Options := Scope_Suppress;
- end;
+ -- Capture any modifications to suppress options from config pragmas
+ Opt.Suppress_Options := Scope_Suppress;
+ end;
+
+ -- If there was a -gnatem switch, initialize the mappings of unit names to
+ -- file names and of file names to path names from the mapping file.
+
+ if Mapping_File_Name /= null then
+ Fmap.Initialize (Mapping_File_Name.all);
+ end if;
+
+ -- Adjust Optimize_Alignment mode from debug switches if necessary
+
+ if Debug_Flag_Dot_SS then
+ Optimize_Alignment := 'S';
+ elsif Debug_Flag_Dot_TT then
+ Optimize_Alignment := 'T';
end if;
-- We have now processed the command line switches, and the gnat.adc
Opt.Register_Opt_Config_Switches;
+ -- Check for file which contains No_Body pragma
+
+ if Source_File_Is_No_Body (Source_Index (Main_Unit)) then
+ Change_Main_Unit_To_Spec;
+ end if;
+
-- Initialize the scanner. Note that we do this after the call to
-- Create_Standard, which uses the scanner in its processing of
-- floating-point bounds.
Initialize_Scanner (Main_Unit, Source_Index (Main_Unit));
- -- Output header if in verbose mode or full list mode
-
- if Verbose_Mode or Full_List then
- Write_Eol;
-
- if Operating_Mode = Generate_Code then
- Write_Str ("Compiling: ");
- else
- Write_Str ("Checking: ");
- end if;
-
- Write_Name (Full_File_Name (Current_Source_File));
-
- if not Debug_Flag_7 then
- Write_Str (" (source file time stamp: ");
- Write_Time_Stamp (Current_Source_File);
- Write_Char (')');
- end if;
-
- Write_Eol;
- end if;
-
-- Here we call the parser to parse the compilation unit (or units in
-- the check syntax mode, but in that case we won't go on to the
-- semantics in any case).
- declare
- Discard : List_Id;
-
- begin
- Discard := Par (Configuration_Pragmas => False);
- end;
+ Discard_List (Par (Configuration_Pragmas => False));
-- The main unit is now loaded, and subunits of it can be loaded,
-- without reporting spurious loading circularities.
Set_Loading (Main_Unit, False);
- -- Now on to the semantics. We skip the semantics if we are in syntax
- -- only mode, or if we encountered a fatal error during the parsing.
+ -- Now that the main unit is installed, we can complete the analysis
+ -- of the pragmas in gnat.adc and the configuration file, that require
+ -- a context for their semantic processing.
- if Operating_Mode /= Check_Syntax
- and then not Fatal_Error (Main_Unit)
+ if Config_Pragmas /= Error_List
+ and then Operating_Mode /= Check_Syntax
then
- -- Reset Operating_Mode to Check_Semantics for subunits. We cannot
- -- actually generate code for subunits, so we suppress expansion.
- -- This also corrects certain problems that occur if we try to
- -- incorporate subunits at a lower level.
+ -- Pragmas that require some semantic activity, such as
+ -- Interrupt_State, cannot be processed until the main unit
+ -- is installed, because they require a compilation unit on
+ -- which to attach with_clauses, etc. So analyze them now.
- if Operating_Mode = Generate_Code
- and then Nkind (Unit (Cunit (Main_Unit))) = N_Subunit
- then
- Operating_Mode := Check_Semantics;
- end if;
+ declare
+ Prag : Node_Id;
- -- Analyze (and possibly expand) main unit
+ begin
+ Prag := First (Config_Pragmas);
+ while Present (Prag) loop
+ if Delay_Config_Pragma_Analyze (Prag) then
+ Analyze_Pragma (Prag);
+ end if;
- Scope_Suppress := Suppress_Options;
- Semantics (Cunit (Main_Unit));
+ Next (Prag);
+ end loop;
+ end;
+ end if;
- -- Cleanup processing after completing main analysis
+ -- If we have restriction No_Exception_Propagation, and we did not have an
+ -- explicit switch turning off Warn_On_Non_Local_Exception, then turn on
+ -- this warning by default if we have encountered an exception handler.
- if Operating_Mode = Generate_Code
- or else (Operating_Mode = Check_Semantics
- and then Tree_Output)
- then
- Instantiate_Bodies;
- end if;
+ if Restriction_Active (No_Exception_Propagation)
+ and then not No_Warn_On_Non_Local_Exception
+ and then Exception_Handler_Encountered
+ then
+ Warn_On_Non_Local_Exception := True;
+ end if;
- if Operating_Mode = Generate_Code then
+ -- Now on to the semantics. Skip if in syntax only mode
- if Inline_Processing_Required then
- Analyze_Inlined_Bodies;
- end if;
+ if Operating_Mode /= Check_Syntax then
+
+ -- Install the configuration pragmas in the tree
+
+ Set_Config_Pragmas (Aux_Decls_Node (Cunit (Main_Unit)), Config_Pragmas);
+
+ -- Following steps are skipped if we had a fatal error during parsing
+
+ if not Fatal_Error (Main_Unit) then
- -- Remove entities from program that do not have any
- -- execution time references.
+ -- Reset Operating_Mode to Check_Semantics for subunits. We cannot
+ -- actually generate code for subunits, so we suppress expansion.
+ -- This also corrects certain problems that occur if we try to
+ -- incorporate subunits at a lower level.
- if Debug_Flag_UU then
- Collect_Garbage_Entities;
+ if Operating_Mode = Generate_Code
+ and then Nkind (Unit (Cunit (Main_Unit))) = N_Subunit
+ then
+ Operating_Mode := Check_Semantics;
end if;
- Check_Elab_Calls;
+ -- Analyze (and possibly expand) main unit
- -- Build unit exception table. We leave this up to the end to
- -- make sure that all the necessary information is at hand.
+ Scope_Suppress := Suppress_Options;
+ Semantics (Cunit (Main_Unit));
- Exp_Ch11.Generate_Unit_Exception_Table;
+ -- Cleanup processing after completing main analysis
- -- Save the unit name and list of packages named in Use_Package
- -- clauses for subsequent use in generating a special symbol for
- -- the debugger for certain targets that require this.
+ if Operating_Mode = Generate_Code
+ or else (Operating_Mode = Check_Semantics
+ and then ASIS_Mode)
+ then
+ Instantiate_Bodies;
+ end if;
- Exp_Dbug.Save_Unitname_And_Use_List
- (Cunit (Main_Unit), Nkind (Unit (Cunit (Main_Unit))));
- end if;
+ if Operating_Mode = Generate_Code then
+ if Inline_Processing_Required then
+ Analyze_Inlined_Bodies;
+ end if;
- -- List library units if requested
+ -- Remove entities from program that do not have any
+ -- execution time references.
- if List_Units then
- Lib.List;
- end if;
+ if Debug_Flag_UU then
+ Collect_Garbage_Entities;
+ end if;
+
+ Check_Elab_Calls;
+ end if;
- -- Output any messages for unreferenced entities
+ -- List library units if requested
- Output_Unreferenced_Messages;
- Sem_Warn.Check_Unused_Withs;
+ if List_Units then
+ Lib.List;
+ end if;
+
+ -- Output waiting warning messages
+
+ Sem_Warn.Output_Non_Modified_In_Out_Warnings;
+ Sem_Warn.Output_Unreferenced_Messages;
+ Sem_Warn.Check_Unused_Withs;
+ Sem_Warn.Output_Unused_Warnings_Off_Warnings;
+ end if;
end if;
-- Qualify all entity names in inner packages, package bodies, etc.,
- -- except when compiling for the JVM back end, which depends on
- -- having unqualified names in certain cases and handles the generation
- -- of qualified names when needed.
+ -- except when compiling for the VM back-ends, which depend on
+ -- having unqualified names in certain cases and handles the
+ -- generation of qualified names when needed.
- if not Java_VM then
+ if VM_Target = No_VM then
Exp_Dbug.Qualify_All_Entity_Names;
- Exp_Dbug.Generate_Auxiliary_Types;
+ end if;
+
+ -- SCIL backend requirement. Check that SCIL nodes associated with
+ -- dispatching calls reference subprogram calls.
+
+ if Generate_SCIL then
+ pragma Debug (Sem_SCIL.Check_SCIL_Nodes (Cunit (Main_Unit)));
+ null;
end if;
-- Dump the source now. Note that we do this as soon as the analysis
-- of -gnatD, where it rewrites all source locations in the tree.
Sprint.Source_Dump;
+
+ -- Check again for configuration pragmas that appear in the context of
+ -- the main unit. These pragmas only affect the main unit, and the
+ -- corresponding flag is reset after each call to Semantics, but they
+ -- may affect the generated ali for the unit, and therefore the flag
+ -- must be set properly after compilation. Currently we only check for
+ -- Initialize_Scalars, but others should be checked: as well???
+
+ declare
+ Item : Node_Id;
+
+ begin
+ Item := First (Context_Items (Cunit (Main_Unit)));
+ while Present (Item) loop
+ if Nkind (Item) = N_Pragma
+ and then Pragma_Name (Item) = Name_Initialize_Scalars
+ then
+ Initialize_Scalars := True;
+ end if;
+
+ Next (Item);
+ end loop;
+ end;
+
+ -- If a mapping file has been specified by a -gnatem switch, update
+ -- it if there has been some sources that were not in the mappings.
+
+ if Mapping_File_Name /= null then
+ Fmap.Update_Mapping_File (Mapping_File_Name.all);
+ end if;
+
+ return;
end Frontend;
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