1 ------------------------------------------------------------------------------
3 -- GNAT COMPILER COMPONENTS --
10 -- Copyright (C) 1992-2002, Free Software Foundation, Inc. --
12 -- GNAT is free software; you can redistribute it and/or modify it under --
13 -- terms of the GNU General Public License as published by the Free Soft- --
14 -- ware Foundation; either version 2, or (at your option) any later ver- --
15 -- sion. GNAT is distributed in the hope that it will be useful, but WITH- --
16 -- OUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY --
17 -- or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License --
18 -- for more details. You should have received a copy of the GNU General --
19 -- Public License distributed with GNAT; see file COPYING. If not, write --
20 -- to the Free Software Foundation, 59 Temple Place - Suite 330, Boston, --
21 -- MA 02111-1307, USA. --
23 -- GNAT was originally developed by the GNAT team at New York University. --
24 -- Extensive contributions were provided by Ada Core Technologies Inc. --
26 ------------------------------------------------------------------------------
28 with Atree; use Atree;
29 with Casing; use Casing;
30 with Csets; use Csets;
31 with Debug; use Debug;
32 with Einfo; use Einfo;
33 with Elists; use Elists;
34 with Fname; use Fname;
35 with Fname.UF; use Fname.UF;
37 with Lib.Load; use Lib.Load;
38 with Namet; use Namet;
39 with Nlists; use Nlists;
40 with Nmake; use Nmake;
41 with Output; use Output;
43 with Restrict; use Restrict;
45 with Sem_Ch7; use Sem_Ch7;
46 with Sem_Util; use Sem_Util;
47 with Sinfo; use Sinfo;
48 with Stand; use Stand;
49 with Snames; use Snames;
50 with Tbuild; use Tbuild;
51 with Uname; use Uname;
53 package body Rtsfind is
59 -- The unit table has one entry for each unit included in the definition
60 -- of the type RTU_Id in the spec. The table entries are initialized in
61 -- Initialize to set the Entity field to Empty, indicating that the
62 -- corresponding unit has not yet been loaded. The fields are set when
63 -- a unit is loaded to contain the defining entity for the unit, the
64 -- unit name, and the unit number.
66 type RT_Unit_Table_Record is record
68 Uname : Unit_Name_Type;
69 Unum : Unit_Number_Type;
73 RT_Unit_Table : array (RTU_Id) of RT_Unit_Table_Record;
75 --------------------------
76 -- Runtime Entity Table --
77 --------------------------
79 -- There is one entry in the runtime entity table for each entity that is
80 -- included in the definition of the RE_Id type in the spec. The entries
81 -- are set by Initialize_Rtsfind to contain Empty, indicating that the
82 -- entity has not yet been located. Once the entity is located for the
83 -- first time, its ID is stored in this array, so that subsequent calls
84 -- for the same entity can be satisfied immediately.
86 RE_Table : array (RE_Id) of Entity_Id;
88 --------------------------
89 -- Generation of WITH's --
90 --------------------------
92 -- When a unit is implicitly loaded as a result of a call to RTE, it
93 -- is necessary to create an implicit with to ensure that the object
94 -- is correctly loaded by the binder. Such with statements are only
95 -- required when the request is from the extended main unit (if a
96 -- client needs a with, that will be taken care of when the client
99 -- We always attach the with to the main unit. This is not perfectly
100 -- accurate in terms of elaboration requirements, but it is close
101 -- enough, since the units that are accessed using rtsfind do not
102 -- have delicate elaboration requirements.
104 -- The flag Withed in the unit table record is initially set to False.
105 -- It is set True if a with has been generated for the main unit for
106 -- the corresponding unit.
108 -----------------------
109 -- Local Subprograms --
110 -----------------------
112 procedure Load_Fail (S : String; U_Id : RTU_Id; Ent_Name : String := "");
113 -- Internal procedure called if we can't find the entity or unit.
114 -- The parameter is a detailed error message that is to be given.
115 -- S is a reason for failing to compile the file. U_Id is the unit
116 -- id, and Ent_Name, if non-null, is the associated entity name.
118 function Get_Unit_Name (U_Id : RTU_Id) return Unit_Name_Type;
119 -- Retrieves the Unit Name given a unit id represented by its
120 -- enumaration value in RTU_Id.
122 procedure Load_RTU (U_Id : RTU_Id; Use_Setting : Boolean := False);
123 -- Load the unit whose Id is given if not already loaded. The unit is
124 -- loaded, analyzed, and added to the with list, and the entry in
125 -- RT_Unit_Table is updated to reflect the load. The second parameter
126 -- indicates the initial setting for the Is_Potentially_Use_Visible
127 -- flag of the entity for the loaded unit (if it is indeed loaded).
128 -- A value of False means nothing special need be done. A value of
129 -- True indicates that this flag must be set to True. It is needed
130 -- only in the Text_IO_Kludge procedure, which may materialize an
131 -- entity of Text_IO (or Wide_Text_IO) that was previously unknown.
133 function RE_Chars (E : RE_Id) return Name_Id;
134 -- Given a RE_Id value returns the Chars of the corresponding entity.
140 function Get_Unit_Name (U_Id : RTU_Id) return Unit_Name_Type is
141 Uname_Chars : constant String := RTU_Id'Image (U_Id);
144 Name_Len := Uname_Chars'Length;
145 Name_Buffer (1 .. Name_Len) := Uname_Chars;
146 Set_Casing (All_Lower_Case);
148 if U_Id in Ada_Child then
149 Name_Buffer (4) := '.';
151 if U_Id in Ada_Calendar_Child then
152 Name_Buffer (13) := '.';
154 elsif U_Id in Ada_Finalization_Child then
155 Name_Buffer (17) := '.';
157 elsif U_Id in Ada_Real_Time_Child then
158 Name_Buffer (14) := '.';
160 elsif U_Id in Ada_Streams_Child then
161 Name_Buffer (12) := '.';
163 elsif U_Id in Ada_Text_IO_Child then
164 Name_Buffer (12) := '.';
166 elsif U_Id in Ada_Wide_Text_IO_Child then
167 Name_Buffer (17) := '.';
170 elsif U_Id in Interfaces_Child then
171 Name_Buffer (11) := '.';
173 elsif U_Id in System_Child then
174 Name_Buffer (7) := '.';
176 if U_Id in System_Tasking_Child then
177 Name_Buffer (15) := '.';
180 if U_Id in System_Tasking_Restricted_Child then
181 Name_Buffer (26) := '.';
184 if U_Id in System_Tasking_Protected_Objects_Child then
185 Name_Buffer (33) := '.';
188 if U_Id in System_Tasking_Async_Delays_Child then
189 Name_Buffer (28) := '.';
193 -- Add %s at end for spec
195 Name_Buffer (Name_Len + 1) := '%';
196 Name_Buffer (Name_Len + 2) := 's';
197 Name_Len := Name_Len + 2;
206 procedure Initialize is
208 -- Initialize the unit table
211 RT_Unit_Table (J).Entity := Empty;
215 RE_Table (J) := Empty;
223 function Is_RTE (Ent : Entity_Id; E : RE_Id) return Boolean is
224 E_Unit_Name : Unit_Name_Type;
225 Ent_Unit_Name : Unit_Name_Type;
235 -- If E has already a corresponding entity, check it directly,
236 -- going to full views if they exist to deal with the incomplete
237 -- and private type cases properly.
239 elsif Present (RE_Table (E)) then
242 if Is_Type (E1) and then Present (Full_View (E1)) then
243 E1 := Full_View (E1);
248 if Is_Type (E2) and then Present (Full_View (E2)) then
249 E2 := Full_View (E2);
255 -- If the unit containing E is not loaded, we already know that
256 -- the entity we have cannot have come from this unit.
258 E_Unit_Name := Get_Unit_Name (RE_Unit_Table (E));
260 if not Is_Loaded (E_Unit_Name) then
264 -- Here the unit containing the entity is loaded. We have not made
265 -- an explicit call to RTE to get the entity in question, but we may
266 -- have obtained a reference to it indirectly from some other entity
267 -- in the same unit, or some other unit that references it.
269 -- Get the defining unit of the entity
273 if Ekind (S) /= E_Package then
277 Ent_Unit_Name := Get_Unit_Name (Unit_Declaration_Node (S));
279 -- If the defining unit of the entity we are testing is not the
280 -- unit containing E, then they cannot possibly match.
282 if Ent_Unit_Name /= E_Unit_Name then
286 -- If the units match, then compare the names (remember that no
287 -- overloading is permitted in entities fetched using Rtsfind).
289 if RE_Chars (E) = Chars (Ent) then
292 -- If front-end inlining is enabled, we may be within a body that
293 -- contains inlined functions, which has not been retrieved through
294 -- rtsfind, and therefore is not yet recorded in the RT_Unit_Table.
295 -- Add the unit information now, it must be fully available.
298 U : RT_Unit_Table_Record
299 renames RT_Unit_Table (RE_Unit_Table (E));
301 if No (U.Entity) then
303 U.Uname := E_Unit_Name;
304 U.Unum := Get_Source_Unit (S);
314 ----------------------------
315 -- Is_Text_IO_Kludge_Unit --
316 ----------------------------
318 function Is_Text_IO_Kludge_Unit (Nam : Node_Id) return Boolean is
323 if Nkind (Nam) /= N_Expanded_Name then
328 Sel := Selector_Name (Nam);
330 if Nkind (Sel) /= N_Expanded_Name
331 or else Nkind (Prf) /= N_Identifier
332 or else Chars (Prf) /= Name_Ada
338 Sel := Selector_Name (Sel);
341 Nkind (Prf) = N_Identifier
343 (Chars (Prf) = Name_Text_IO or else Chars (Prf) = Name_Wide_Text_IO)
345 Nkind (Sel) = N_Identifier
347 Chars (Sel) in Text_IO_Package_Name;
349 end Is_Text_IO_Kludge_Unit;
355 procedure Load_Fail (S : String; U_Id : RTU_Id; Ent_Name : String := "") is
359 Write_Str ("fatal error: run-time library configuration error");
362 if Ent_Name /= "" then
363 Write_Str ("cannot locate """);
365 -- Copy name skipping initial RE_ or RO_XX characters
367 if Ent_Name (1 .. 2) = "RE" then
368 for J in 4 .. Ent_Name'Length loop
369 Name_Buffer (J - 3) := Ent_Name (J);
372 for J in 7 .. Ent_Name'Length loop
373 Name_Buffer (J - 6) := Ent_Name (J);
377 Name_Len := Ent_Name'Length - 3;
378 Set_Casing (Mixed_Case);
379 Write_Str (Name_Buffer (1 .. Name_Len));
380 Write_Str (""" in file """);
383 Write_Str ("cannot load file """);
387 (Get_File_Name (RT_Unit_Table (U_Id).Uname, Subunit => False));
393 raise Unrecoverable_Error;
400 procedure Load_RTU (U_Id : RTU_Id; Use_Setting : Boolean := False) is
402 U : RT_Unit_Table_Record renames RT_Unit_Table (U_Id);
403 Priv_Par : Elist_Id := New_Elmt_List;
406 procedure Save_Private_Visibility;
407 -- If the current unit is the body of child unit or the spec of a
408 -- private child unit, the private declarations of the parent (s)
409 -- are visible. If the unit to be loaded is another public sibling,
410 -- its compilation will affect the visibility of the common ancestors.
411 -- Indicate those that must be restored.
413 procedure Restore_Private_Visibility;
414 -- Restore the visibility of ancestors after compiling RTU.
416 --------------------------------
417 -- Restore_Private_Visibility --
418 --------------------------------
420 procedure Restore_Private_Visibility is
424 E_Par := First_Elmt (Priv_Par);
426 while Present (E_Par) loop
427 if not In_Private_Part (Node (E_Par)) then
428 Install_Private_Declarations (Node (E_Par));
433 end Restore_Private_Visibility;
435 -----------------------------
436 -- Save_Private_Visibility --
437 -----------------------------
439 procedure Save_Private_Visibility is
443 Par := Scope (Current_Scope);
446 and then Par /= Standard_Standard
448 if Ekind (Par) = E_Package
449 and then Is_Compilation_Unit (Par)
450 and then In_Private_Part (Par)
452 Append_Elmt (Par, Priv_Par);
457 end Save_Private_Visibility;
459 -- Start of processing for Load_RTU
462 -- Nothing to do if unit is already loaded
464 if Present (U.Entity) then
468 -- Otherwise we need to load the unit, First build unit name
469 -- from the enumeration literal name in type RTU_Id.
471 U.Uname := Get_Unit_Name (U_Id);
473 Loaded := Is_Loaded (U.Uname);
475 -- Now do the load call, note that setting Error_Node to Empty is
476 -- a signal to Load_Unit that we will regard a failure to find the
477 -- file as a fatal error, and that it should not output any kind
478 -- of diagnostics, since we will take care of it here.
482 (Load_Name => U.Uname,
485 Error_Node => Empty);
487 if U.Unum = No_Unit then
488 Load_Fail ("unit not found", U_Id);
490 elsif Fatal_Error (U.Unum) then
491 Load_Fail ("parser errors", U_Id);
494 -- Make sure that the unit is analyzed
497 Was_Analyzed : Boolean := Analyzed (Cunit (Current_Sem_Unit));
500 -- Pretend that the current unit is analysed, in case it is
501 -- System or some such. This allows us to put some declarations,
502 -- such as exceptions and packed arrays of Boolean, into System
503 -- even though expanding them requires System...
505 -- This is a bit odd but works fine. If the RTS unit does not depend
506 -- in any way on the current unit, then it never gets back into the
507 -- current unit's tree, and the change we make to the current unit
508 -- tree is never noticed by anyone (it is undone in a moment). That
509 -- is the normal situation.
511 -- If the RTS Unit *does* depend on the current unit, for instance,
512 -- when you are compiling System, then you had better have finished
513 -- Analyzing the part of System that is depended on before you try
514 -- to load the RTS Unit. This means having the System ordered in an
515 -- appropriate manner.
517 Set_Analyzed (Cunit (Current_Sem_Unit), True);
519 if not Analyzed (Cunit (U.Unum)) then
521 Save_Private_Visibility;
522 Semantics (Cunit (U.Unum));
523 Restore_Private_Visibility;
525 if Fatal_Error (U.Unum) then
526 Load_Fail ("semantic errors", U_Id);
532 Set_Analyzed (Cunit (Current_Sem_Unit), Was_Analyzed);
535 Lib_Unit := Unit (Cunit (U.Unum));
536 U.Entity := Defining_Entity (Lib_Unit);
539 Set_Is_Potentially_Use_Visible (U.Entity, True);
547 function RE_Chars (E : RE_Id) return Name_Id is
548 RE_Name_Chars : constant String := RE_Id'Image (E);
551 -- Copy name skipping initial RE_ or RO_XX characters
553 if RE_Name_Chars (1 .. 2) = "RE" then
554 for J in 4 .. RE_Name_Chars'Last loop
555 Name_Buffer (J - 3) := Fold_Lower (RE_Name_Chars (J));
558 Name_Len := RE_Name_Chars'Length - 3;
561 for J in 7 .. RE_Name_Chars'Last loop
562 Name_Buffer (J - 6) := Fold_Lower (RE_Name_Chars (J));
565 Name_Len := RE_Name_Chars'Length - 6;
575 function RTE (E : RE_Id) return Entity_Id is
576 U_Id : constant RTU_Id := RE_Unit_Table (E);
577 U : RT_Unit_Table_Record renames RT_Unit_Table (U_Id);
583 Ravenscar : constant Boolean := Restricted_Profile;
585 -- The following flag is used to disable front-end inlining when RTE
586 -- is invoked. This prevents the analysis of other runtime bodies when
587 -- a particular spec is loaded through Rtsfind. This is both efficient,
588 -- and it prevents spurious visibility conflicts between use-visible
589 -- user entities, and entities in run-time packages.
591 -- In No_Run_Time mode, subprograms marked Inlined_Always must be
592 -- inlined, so in the case we retain the Front_End_Inlining mode.
594 Save_Front_End_Inlining : Boolean;
597 -- Reject programs that make use of distribution features not supported
598 -- on the current target. On such targets (VMS, Vxworks, others?) we
599 -- only provide a minimal body for System.Rpc that only supplies an
600 -- implementation of partition_id.
602 function Find_Local_Entity (E : RE_Id) return Entity_Id;
603 -- This function is used when entity E is in this compilation's main
604 -- unit. It gets the value from the already compiled declaration.
606 function Make_Unit_Name (N : Node_Id) return Node_Id;
607 -- If the unit is a child unit, build fully qualified name for use
614 procedure Check_RPC is
615 Body_Name : Unit_Name_Type;
616 Unum : Unit_Number_Type;
619 -- Bypass this check if debug flag -gnatdR set
621 if Debug_Flag_RR then
625 -- Otherwise we need the check if we are going after one of
626 -- the critical entities in System.RPC in stubs mode.
628 if (Distribution_Stub_Mode = Generate_Receiver_Stub_Body
630 Distribution_Stub_Mode = Generate_Caller_Stub_Body)
631 and then (E = RE_Do_Rpc
632 or else E = RE_Do_Apc
633 or else E = RE_Params_Stream_Type
634 or else E = RE_RPC_Receiver)
636 -- Load body of System.Rpc, and abort if this is the body that is
637 -- provided by GNAT, for which these features are not supported
638 -- on current target. We identify the gnat body by the presence
639 -- of a local entity called Gnat in the first declaration.
641 Lib_Unit := Unit (Cunit (U.Unum));
642 Body_Name := Get_Body_Name (Get_Unit_Name (Lib_Unit));
645 (Load_Name => Body_Name,
651 if Unum /= No_Unit then
653 Decls : List_Id := Declarations (Unit (Cunit (Unum)));
657 and then Nkind (First (Decls)) = N_Object_Declaration
659 Chars (Defining_Identifier (First (Decls))) = Name_Gnat
662 Write_Str ("distribution feature not supported");
664 raise Unrecoverable_Error;
671 ------------------------
672 -- Find_System_Entity --
673 ------------------------
675 function Find_Local_Entity (E : RE_Id) return Entity_Id is
676 RE_Str : String renames RE_Id'Image (E);
679 Save_Nam : constant String := Name_Buffer (1 .. Name_Len);
680 -- Save name buffer and length over call
683 Name_Len := Natural'Max (0, RE_Str'Length - 3);
684 Name_Buffer (1 .. Name_Len) :=
685 RE_Str (RE_Str'First + 3 .. RE_Str'Last);
687 Ent := Entity_Id (Get_Name_Table_Info (Name_Find));
689 Name_Len := Save_Nam'Length;
690 Name_Buffer (1 .. Name_Len) := Save_Nam;
693 end Find_Local_Entity;
699 function Make_Unit_Name (N : Node_Id) return Node_Id is
704 Nam := New_Reference_To (U.Entity, Standard_Location);
705 Scop := Scope (U.Entity);
707 if Nkind (N) = N_Defining_Program_Unit_Name then
708 while Scop /= Standard_Standard loop
710 Make_Expanded_Name (Standard_Location,
711 Chars => Chars (U.Entity),
712 Prefix => New_Reference_To (Scop, Standard_Location),
713 Selector_Name => Nam);
714 Set_Entity (Nam, U.Entity);
716 Scop := Scope (Scop);
723 -- Start of processing for RTE
727 -- Check violation of no run time and ravenscar mode
730 and then not OK_To_Use_In_No_Run_Time_Mode (U_Id)
733 or else not OK_To_Use_In_Ravenscar_Mode (U_Id)
735 Disallow_In_No_Run_Time_Mode (Current_Error_Node);
740 -- Doing a rtsfind in system.ads is special, as we cannot do this
741 -- when compiling System itself. So if we are compiling system then
742 -- we should already have acquired and processed the declaration
743 -- of the entity. The test is to see if this compilation's main unit
744 -- is System. If so, return the value from the already compiled
745 -- declaration and otherwise do a regular find.
747 -- Not pleasant, but these kinds of annoying recursion when
748 -- writing an Ada compiler in Ada have to be broken somewhere!
750 if Present (Main_Unit_Entity)
751 and then Chars (Main_Unit_Entity) = Name_System
752 and then Analyzed (Main_Unit_Entity)
753 and then not Is_Child_Unit (Main_Unit_Entity)
755 return Find_Local_Entity (E);
758 Save_Front_End_Inlining := Front_End_Inlining;
759 Front_End_Inlining := No_Run_Time;
761 -- Load unit if unit not previously loaded
763 if No (RE_Table (E)) then
765 Lib_Unit := Unit (Cunit (U.Unum));
767 -- In the subprogram case, we are all done, the entity we want
768 -- is the entity for the subprogram itself. Note that we do not
769 -- bother to check that it is the entity that was requested.
770 -- the only way that could fail to be the case is if runtime is
771 -- hopelessly misconfigured, and it isn't worth testing for this.
773 if Nkind (Lib_Unit) = N_Subprogram_Declaration then
774 RE_Table (E) := U.Entity;
776 -- Otherwise we must have the package case, and here we have to
777 -- search the package entity chain for the entity we want. The
778 -- entity we want must be present in this chain, or we have a
779 -- misconfigured runtime.
782 pragma Assert (Nkind (Lib_Unit) = N_Package_Declaration);
783 Ename := RE_Chars (E);
785 Pkg_Ent := First_Entity (U.Entity);
787 while Present (Pkg_Ent) loop
788 if Ename = Chars (Pkg_Ent) then
789 RE_Table (E) := Pkg_Ent;
794 Next_Entity (Pkg_Ent);
797 -- If we didn't find the unit we want, something is wrong
798 -- although in no run time mode, we already gave a suitable
799 -- message, and so we simply return Empty, and the caller must
800 -- be prepared to handle this if the RTE call is otherwise
801 -- possible in high integrity mode.
804 and then not OK_To_Use_In_No_Run_Time_Mode (U_Id)
806 Front_End_Inlining := Save_Front_End_Inlining;
810 Load_Fail ("entity not in package", U_Id, RE_Id'Image (E));
816 -- See if we have to generate a with for this entity. We generate
817 -- a with if the current unit is part of the extended main code
818 -- unit, and if we have not already added the with. The with is
819 -- added to the appropriate unit (the current one).
824 In_Extended_Main_Code_Unit (Cunit_Entity (Current_Sem_Unit))
833 Lib_Unit := Unit (Cunit (U.Unum));
835 Make_With_Clause (Standard_Location,
838 (Defining_Unit_Name (Specification (Lib_Unit))));
839 Set_Library_Unit (Withn, Cunit (U.Unum));
840 Set_Corresponding_Spec (Withn, U.Entity);
841 Set_First_Name (Withn, True);
842 Set_Implicit_With (Withn, True);
844 Mark_Rewrite_Insertion (Withn);
845 Append (Withn, Context_Items (Cunit (Current_Sem_Unit)));
849 Front_End_Inlining := Save_Front_End_Inlining;
857 procedure Text_IO_Kludge (Nam : Node_Id) is
860 type Name_Map_Type is array (Text_IO_Package_Name) of RTU_Id;
862 Name_Map : Name_Map_Type := Name_Map_Type'(
863 Name_Decimal_IO => Ada_Text_IO_Decimal_IO,
864 Name_Enumeration_IO => Ada_Text_IO_Enumeration_IO,
865 Name_Fixed_IO => Ada_Text_IO_Fixed_IO,
866 Name_Float_IO => Ada_Text_IO_Float_IO,
867 Name_Integer_IO => Ada_Text_IO_Integer_IO,
868 Name_Modular_IO => Ada_Text_IO_Modular_IO);
870 Wide_Name_Map : Name_Map_Type := Name_Map_Type'(
871 Name_Decimal_IO => Ada_Wide_Text_IO_Decimal_IO,
872 Name_Enumeration_IO => Ada_Wide_Text_IO_Enumeration_IO,
873 Name_Fixed_IO => Ada_Wide_Text_IO_Fixed_IO,
874 Name_Float_IO => Ada_Wide_Text_IO_Float_IO,
875 Name_Integer_IO => Ada_Wide_Text_IO_Integer_IO,
876 Name_Modular_IO => Ada_Wide_Text_IO_Modular_IO);
879 -- Nothing to do if name is not identifier or a selected component
880 -- whose selector_name is not an identifier.
882 if Nkind (Nam) = N_Identifier then
885 elsif Nkind (Nam) = N_Selected_Component
886 and then Nkind (Selector_Name (Nam)) = N_Identifier
888 Chrs := Chars (Selector_Name (Nam));
894 -- Nothing to do if name is not one of the Text_IO subpackages
895 -- Otherwise look through loaded units, and if we find Text_IO
896 -- or Wide_Text_IO already loaded, then load the proper child.
898 if Chrs in Text_IO_Package_Name then
899 for U in Main_Unit .. Last_Unit loop
900 Get_Name_String (Unit_File_Name (U));
902 if Name_Len = 12 then
904 -- Here is where we do the loads if we find one of the
905 -- units Ada.Text_IO or Ada.Wide_Text_IO. An interesting
906 -- detail is that these units may already be used (i.e.
907 -- their In_Use flags may be set). Normally when the In_Use
908 -- flag is set, the Is_Potentially_Use_Visible flag of all
909 -- entities in the package is set, but the new entity we
910 -- are mysteriously adding was not there to have its flag
911 -- set at the time. So that's why we pass the extra parameter
912 -- to RTU_Find, to make sure the flag does get set now.
913 -- Given that those generic packages are in fact child units,
914 -- we must indicate that they are visible.
916 if Name_Buffer (1 .. 12) = "a-textio.ads" then
917 Load_RTU (Name_Map (Chrs), In_Use (Cunit_Entity (U)));
918 Set_Is_Visible_Child_Unit
919 (RT_Unit_Table (Name_Map (Chrs)).Entity);
921 elsif Name_Buffer (1 .. 12) = "a-witeio.ads" then
922 Load_RTU (Wide_Name_Map (Chrs), In_Use (Cunit_Entity (U)));
923 Set_Is_Visible_Child_Unit
924 (RT_Unit_Table (Wide_Name_Map (Chrs)).Entity);