-- --
-- S p e c --
-- --
--- Copyright (C) 1992-2006, 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, 51 Franklin Street, Fifth Floor, --
--- Boston, MA 02110-1301, USA. --
+-- or FITNESS FOR A PARTICULAR PURPOSE. --
-- --
--- As a special exception, if other files instantiate generics from this --
--- unit, or you link this unit with other files to produce an executable, --
--- this unit does not by itself cause the resulting executable to be --
--- covered by the GNU General Public License. This exception does not --
--- however invalidate any other reasons why the executable file might be --
--- covered by the GNU Public License. --
+-- As a special exception under Section 7 of GPL version 3, you are granted --
+-- additional permissions described in the GCC Runtime Library Exception, --
+-- version 3.1, as published by the Free Software Foundation. --
+-- --
+-- You should have received a copy of the GNU General Public License and --
+-- a copy of the GCC Runtime Library Exception along with this program; --
+-- see the files COPYING3 and COPYING.RUNTIME respectively. If not, see --
+-- <http://www.gnu.org/licenses/>. --
-- --
-- GNAT was originally developed by the GNAT team at New York University. --
-- Extensive contributions were provided by Ada Core Technologies Inc. --
-- information. It contains the routine to load subsidiary units.
with Alloc;
+with Namet; use Namet;
with Table;
-with Types; use Types;
+with Types; use Types;
package Lib is
-- Special Handling of Subprogram Bodies --
-------------------------------------------
- -- A subprogram body (in an adb file) may stand for both a spec and a
- -- body. A simple model (and one that was adopted through version 2.07),
- -- is simply to assume that such an adb file acts as its own spec if no
- -- ads file is present.
+ -- A subprogram body (in an adb file) may stand for both a spec and a body.
+ -- A simple model (and one that was adopted through version 2.07) is simply
+ -- to assume that such an adb file acts as its own spec if no ads file is
+ -- is present.
-- However, this is not correct. RM 10.1.4(4) requires that such a body
-- act as a spec unless a subprogram declaration of the same name is
-- order. The number is ones origin, so a value of 2 refers to the
-- second generated D line. The Dependency_Number values are set
-- as the D lines are generated, and are used to generate proper
- -- unit references in the generated xref information.
+ -- unit references in the generated xref information and SCO output.
-- Dynamic_Elab
-- A flag indicating if this unit was compiled with dynamic elaboration
-- (RACW) object. This is used for controlling generation of the RA
-- attribute in the ali file.
+ -- Is_Compiler_Unit
+ -- A Boolean flag, initially set False by default, set to True if a
+ -- pragma Compiler_Unit appears in the unit.
+
-- Ident_String
-- N_String_Literal node from a valid pragma Ident that applies to
-- this unit. If no Ident pragma applies to the unit, then Empty.
-- that the default priority is to be used (and is also used for
-- entries that do not correspond to possible main programs).
+ -- OA_Setting
+ -- This is a character field containing L if Optimize_Alignment mode
+ -- was set locally, and O/T/S for Off/Time/Space default if not.
+
-- Serial_Number
-- This field holds a serial number used by New_Internal_Name to
-- generate unique temporary numbers on a unit by unit basis. The
function Generate_Code (U : Unit_Number_Type) return Boolean;
function Ident_String (U : Unit_Number_Type) return Node_Id;
function Has_RACW (U : Unit_Number_Type) return Boolean;
+ function Is_Compiler_Unit (U : Unit_Number_Type) return Boolean;
function Loading (U : Unit_Number_Type) return Boolean;
function Main_Priority (U : Unit_Number_Type) return Int;
function Munit_Index (U : Unit_Number_Type) return Nat;
+ function OA_Setting (U : Unit_Number_Type) return Character;
function Source_Index (U : Unit_Number_Type) return Source_File_Index;
function Unit_File_Name (U : Unit_Number_Type) return File_Name_Type;
function Unit_Name (U : Unit_Number_Type) return Unit_Name_Type;
-- Get value of named field from given units table entry
- procedure Set_Cunit (U : Unit_Number_Type; N : Node_Id);
- procedure Set_Cunit_Entity (U : Unit_Number_Type; E : Entity_Id);
- procedure Set_Dynamic_Elab (U : Unit_Number_Type; B : Boolean := True);
- procedure Set_Error_Location (U : Unit_Number_Type; W : Source_Ptr);
- procedure Set_Fatal_Error (U : Unit_Number_Type; B : Boolean := True);
- procedure Set_Generate_Code (U : Unit_Number_Type; B : Boolean := True);
- procedure Set_Has_RACW (U : Unit_Number_Type; B : Boolean := True);
- procedure Set_Ident_String (U : Unit_Number_Type; N : Node_Id);
- procedure Set_Loading (U : Unit_Number_Type; B : Boolean := True);
- procedure Set_Main_Priority (U : Unit_Number_Type; P : Int);
- procedure Set_Unit_Name (U : Unit_Number_Type; N : Unit_Name_Type);
+ procedure Set_Cunit (U : Unit_Number_Type; N : Node_Id);
+ procedure Set_Cunit_Entity (U : Unit_Number_Type; E : Entity_Id);
+ procedure Set_Dynamic_Elab (U : Unit_Number_Type; B : Boolean := True);
+ procedure Set_Error_Location (U : Unit_Number_Type; W : Source_Ptr);
+ procedure Set_Fatal_Error (U : Unit_Number_Type; B : Boolean := True);
+ procedure Set_Generate_Code (U : Unit_Number_Type; B : Boolean := True);
+ procedure Set_Has_RACW (U : Unit_Number_Type; B : Boolean := True);
+ procedure Set_Is_Compiler_Unit (U : Unit_Number_Type; B : Boolean := True);
+ procedure Set_Ident_String (U : Unit_Number_Type; N : Node_Id);
+ procedure Set_Loading (U : Unit_Number_Type; B : Boolean := True);
+ procedure Set_Main_Priority (U : Unit_Number_Type; P : Int);
+ procedure Set_OA_Setting (U : Unit_Number_Type; C : Character);
+ procedure Set_Unit_Name (U : Unit_Number_Type; N : Unit_Name_Type);
-- Set value of named field for given units table entry. Note that we
-- do not have an entry for each possible field, since some of the fields
-- can only be set by specialized interfaces (defined below).
-- Same function as above but argument is a source pointer
function Earlier_In_Extended_Unit (S1, S2 : Source_Ptr) return Boolean;
- -- Given two Sloc values for which In_Same_Extended_Unit is true,
- -- determine if S1 appears before S2. Returns True if S1 appears before
- -- S2, and False otherwise. The result is undefined if S1 and S2 are
- -- not in the same extended unit.
+ -- Given two Sloc values for which In_Same_Extended_Unit is true, determine
+ -- if S1 appears before S2. Returns True if S1 appears before S2, and False
+ -- otherwise. The result is undefined if S1 and S2 are not in the same
+ -- extended unit. Note: this routine will not give reliable results if
+ -- called after Sprint has been called with -gnatD set.
function Compilation_Switches_Last return Nat;
-- Return the count of stored compilation switches
-- which may influence the generated output file(s). Switch is the text of
-- the switch to store (except that -fRTS gets changed back to --RTS).
+ procedure Enable_Switch_Storing;
+ -- Enable registration of switches by Store_Compilation_Switch. Used to
+ -- avoid registering switches added automatically by the gcc driver at the
+ -- beginning of the command line.
+
procedure Disable_Switch_Storing;
-- Disable registration of switches by Store_Compilation_Switch. Used to
- -- avoid registering switches added automatically by the gcc driver.
+ -- avoid registering switches added automatically by the gcc driver at the
+ -- end of the command line.
procedure Store_Linker_Option_String (S : String_Id);
-- This procedure is called to register the string from a pragma
procedure Lock;
-- Lock internal tables before calling back end
+ procedure Unlock;
+ -- Unlock internal tables, in cases where the back end needs to modify them
+
procedure Tree_Read;
-- Initializes internal tables from current tree file using the relevant
-- Table.Tree_Read routines.
-- time stamp are also output. File_Names_Only also restricts the list to
-- exclude any predefined files.
- function Generic_Separately_Compiled (E : Entity_Id) return Boolean;
- -- This is the old version of tbe documentation of this function:
- --
- -- Most generic units must be separately compiled. Since we always use
+ function Generic_May_Lack_ALI (Sfile : File_Name_Type) return Boolean;
+ -- Generic units must be separately compiled. Since we always use
-- macro substitution for generics, the resulting object file is a dummy
- -- one with no code, but the ali file has the normal form, and we need
- -- this ali file so that the binder can work out a correct order of
- -- elaboration. However, we do not need to separate compile generics
- -- if the generic files are language defined, since in this case there
- -- are no order of elaborration problems, and we can simply incorporate
- -- the context clause of the generic unit into the client. There are two
- -- reasons for making this exception for predefined units. First, clearly
- -- it is more efficient not to introduce extra unnecessary files. Second,
- -- the old version of GNAT did not compile any generic units. That was
- -- clearly incorrect in some cases of complex order of elaboration and
- -- was fixed in version 3.10 of GNAT. However, the transition would have
- -- caused bootstrap path problems in the case of generics used in the
- -- compiler itself. The only such generics are predefined ones. This
- -- function returns True if the given generic unit entity E is for a
- -- generic unit that should be separately compiled, and false otherwise.
- --
- -- Now GNAT can compile any generic unit including predefined ones, but
- -- because of the backward compatibility (to keep the ability to use old
- -- compiler versions to build GNAT) compiling library generics is an
- -- option. That is, now GNAT compiles a library generic as an ordinary
- -- unit, but it also can build an exeutable in case if its library contains
- -- some (or all) predefined generics non compiled. See 9628-002 for the
- -- description of changes to be done to get rid of a special processing of
- -- library generic.
- --
- -- So now this function returns TRUE if a generic MUST be separately
- -- compiled with the current approach.
-
- function Generic_Separately_Compiled
- (Sfile : File_Name_Type) return Boolean;
- -- Same as the previous function, but works directly on a unit file name
+ -- one with no code, but the ALI file has the normal form, and we need
+ -- this ALI file so that the binder can work out a correct order of
+ -- elaboration.
+
+ -- However, ancient versions of GNAT used to not generate code or ALI
+ -- files for generic units, and this would yield complex order of
+ -- elaboration issues. These were fixed in GNAT 3.10. The support for not
+ -- compiling language-defined library generics was retained nonetheless
+ -- to facilitate bootstrap. Specifically, it is convenient to have
+ -- the same list of files to be compiled for all stages. So, if the
+ -- bootstrap compiler does not generate code for a given file, then
+ -- the stage1 compiler (and binder) also must deal with the case of
+ -- that file not being compiled. The predicate Generic_May_Lack_ALI is
+ -- True for those generic units for which missing ALI files are allowed.
private
pragma Inline (Cunit);
pragma Inline (Fatal_Error);
pragma Inline (Generate_Code);
pragma Inline (Has_RACW);
+ pragma Inline (Is_Compiler_Unit);
pragma Inline (Increment_Serial_Number);
pragma Inline (Loading);
pragma Inline (Main_Priority);
pragma Inline (Munit_Index);
+ pragma Inline (OA_Setting);
pragma Inline (Set_Cunit);
pragma Inline (Set_Cunit_Entity);
pragma Inline (Set_Fatal_Error);
pragma Inline (Set_Has_RACW);
pragma Inline (Set_Loading);
pragma Inline (Set_Main_Priority);
+ pragma Inline (Set_OA_Setting);
pragma Inline (Set_Unit_Name);
pragma Inline (Source_Index);
pragma Inline (Unit_File_Name);
Cunit : Node_Id;
Cunit_Entity : Entity_Id;
Dependency_Num : Int;
- Fatal_Error : Boolean;
- Generate_Code : Boolean;
- Has_RACW : Boolean;
Ident_String : Node_Id;
- Loading : Boolean;
Main_Priority : Int;
Serial_Number : Nat;
Version : Word;
- Dynamic_Elab : Boolean;
Error_Location : Source_Ptr;
+ Fatal_Error : Boolean;
+ Generate_Code : Boolean;
+ Has_RACW : Boolean;
+ Is_Compiler_Unit : Boolean;
+ Dynamic_Elab : Boolean;
+ Loading : Boolean;
+ OA_Setting : Character;
+ end record;
+
+ -- The following representation clause ensures that the above record
+ -- has no holes. We do this so that when instances of this record are
+ -- written by Tree_Gen, we do not write uninitialized values to the file.
+
+ for Unit_Record use record
+ Unit_File_Name at 0 range 0 .. 31;
+ Unit_Name at 4 range 0 .. 31;
+ Munit_Index at 8 range 0 .. 31;
+ Expected_Unit at 12 range 0 .. 31;
+ Source_Index at 16 range 0 .. 31;
+ Cunit at 20 range 0 .. 31;
+ Cunit_Entity at 24 range 0 .. 31;
+ Dependency_Num at 28 range 0 .. 31;
+ Ident_String at 32 range 0 .. 31;
+ Main_Priority at 36 range 0 .. 31;
+ Serial_Number at 40 range 0 .. 31;
+ Version at 44 range 0 .. 31;
+ Error_Location at 48 range 0 .. 31;
+ Fatal_Error at 52 range 0 .. 7;
+ Generate_Code at 53 range 0 .. 7;
+ Has_RACW at 54 range 0 .. 7;
+ Dynamic_Elab at 55 range 0 .. 7;
+ Is_Compiler_Unit at 56 range 0 .. 7;
+ OA_Setting at 57 range 0 .. 7;
+ Loading at 58 range 0 .. 15;
end record;
+ for Unit_Record'Size use 60 * 8;
+ -- This ensures that we did not leave out any fields
+
package Units is new Table.Table (
Table_Component_Type => Unit_Record,
Table_Index_Type => Unit_Number_Type,
Table_Name => "Linker_Option_Lines");
-- The following table records the compilation switches used to compile
- -- the main unit. The table includes only switches and excludes -quiet,
- -- -dumpbase, and -o switches, since the latter are typically artifacts
- -- of the gcc/gnat1 interface.
+ -- the main unit. The table includes only switches. It excludes -o
+ -- switches as well as artifacts of the gcc/gnat1 interface such as
+ -- -quiet, -dumpbase, or -auxbase.
-- This table is set as part of the compiler argument scanning in
-- Back_End. It can also be reset in -gnatc mode from the data in an
-- Type to hold list of indirect references to unit number table
type Load_Stack_Entry is record
- Unit_Number : Unit_Number_Type;
- From_Limited_With : Boolean;
+ Unit_Number : Unit_Number_Type;
+ With_Node : Node_Id;
end record;
-- The Load_Stack table contains a list of unit numbers (indices into the
package Load_Stack is new Table.Table (
Table_Component_Type => Load_Stack_Entry,
- Table_Index_Type => Nat,
+ Table_Index_Type => Int,
Table_Low_Bound => 0,
Table_Initial => Alloc.Load_Stack_Initial,
Table_Increment => Alloc.Load_Stack_Increment,
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