1 ------------------------------------------------------------------------------
3 -- GNAT COMPILER COMPONENTS --
9 -- Copyright (C) 1992-2002, Free Software Foundation, Inc. --
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, 59 Temple Place - Suite 330, Boston, --
20 -- MA 02111-1307, USA. --
22 -- GNAT was originally developed by the GNAT team at New York University. --
23 -- Extensive contributions were provided by Ada Core Technologies Inc. --
25 ------------------------------------------------------------------------------
27 with Atree; use Atree;
28 with Casing; use Casing;
29 with Csets; use Csets;
30 with Debug; use Debug;
31 with Einfo; use Einfo;
32 with Elists; use Elists;
33 with Fname; use Fname;
34 with Fname.UF; use Fname.UF;
36 with Lib.Load; use Lib.Load;
37 with Namet; use Namet;
38 with Nlists; use Nlists;
39 with Nmake; use Nmake;
40 with Output; use Output;
42 with Restrict; use Restrict;
44 with Sem_Ch7; use Sem_Ch7;
45 with Sem_Util; use Sem_Util;
46 with Sinfo; use Sinfo;
47 with Stand; use Stand;
48 with Snames; use Snames;
49 with Tbuild; use Tbuild;
50 with Uname; use Uname;
52 package body Rtsfind is
58 -- The unit table has one entry for each unit included in the definition
59 -- of the type RTU_Id in the spec. The table entries are initialized in
60 -- Initialize to set the Entity field to Empty, indicating that the
61 -- corresponding unit has not yet been loaded. The fields are set when
62 -- a unit is loaded to contain the defining entity for the unit, the
63 -- unit name, and the unit number.
65 type RT_Unit_Table_Record is record
67 Uname : Unit_Name_Type;
68 Unum : Unit_Number_Type;
72 RT_Unit_Table : array (RTU_Id) of RT_Unit_Table_Record;
74 --------------------------
75 -- Runtime Entity Table --
76 --------------------------
78 -- There is one entry in the runtime entity table for each entity that is
79 -- included in the definition of the RE_Id type in the spec. The entries
80 -- are set by Initialize_Rtsfind to contain Empty, indicating that the
81 -- entity has not yet been located. Once the entity is located for the
82 -- first time, its ID is stored in this array, so that subsequent calls
83 -- for the same entity can be satisfied immediately.
85 RE_Table : array (RE_Id) of Entity_Id;
87 --------------------------
88 -- Generation of WITH's --
89 --------------------------
91 -- When a unit is implicitly loaded as a result of a call to RTE, it
92 -- is necessary to create an implicit with to ensure that the object
93 -- is correctly loaded by the binder. Such with statements are only
94 -- required when the request is from the extended main unit (if a
95 -- client needs a with, that will be taken care of when the client
98 -- We always attach the with to the main unit. This is not perfectly
99 -- accurate in terms of elaboration requirements, but it is close
100 -- enough, since the units that are accessed using rtsfind do not
101 -- have delicate elaboration requirements.
103 -- The flag Withed in the unit table record is initially set to False.
104 -- It is set True if a with has been generated for the main unit for
105 -- the corresponding unit.
107 -----------------------
108 -- Local Subprograms --
109 -----------------------
111 procedure Load_Fail (S : String; U_Id : RTU_Id; Ent_Name : String := "");
112 -- Internal procedure called if we can't find the entity or unit.
113 -- The parameter is a detailed error message that is to be given.
114 -- S is a reason for failing to compile the file. U_Id is the unit
115 -- id, and Ent_Name, if non-null, is the associated entity name.
117 function Get_Unit_Name (U_Id : RTU_Id) return Unit_Name_Type;
118 -- Retrieves the Unit Name given a unit id represented by its
119 -- enumaration value in RTU_Id.
121 procedure Load_RTU (U_Id : RTU_Id; Use_Setting : Boolean := False);
122 -- Load the unit whose Id is given if not already loaded. The unit is
123 -- loaded, analyzed, and added to the with list, and the entry in
124 -- RT_Unit_Table is updated to reflect the load. The second parameter
125 -- indicates the initial setting for the Is_Potentially_Use_Visible
126 -- flag of the entity for the loaded unit (if it is indeed loaded).
127 -- A value of False means nothing special need be done. A value of
128 -- True indicates that this flag must be set to True. It is needed
129 -- only in the Text_IO_Kludge procedure, which may materialize an
130 -- entity of Text_IO (or Wide_Text_IO) that was previously unknown.
132 function RE_Chars (E : RE_Id) return Name_Id;
133 -- Given a RE_Id value returns the Chars of the corresponding entity.
139 function Get_Unit_Name (U_Id : RTU_Id) return Unit_Name_Type is
140 Uname_Chars : constant String := RTU_Id'Image (U_Id);
143 Name_Len := Uname_Chars'Length;
144 Name_Buffer (1 .. Name_Len) := Uname_Chars;
145 Set_Casing (All_Lower_Case);
147 if U_Id in Ada_Child then
148 Name_Buffer (4) := '.';
150 if U_Id in Ada_Calendar_Child then
151 Name_Buffer (13) := '.';
153 elsif U_Id in Ada_Finalization_Child then
154 Name_Buffer (17) := '.';
156 elsif U_Id in Ada_Real_Time_Child then
157 Name_Buffer (14) := '.';
159 elsif U_Id in Ada_Streams_Child then
160 Name_Buffer (12) := '.';
162 elsif U_Id in Ada_Text_IO_Child then
163 Name_Buffer (12) := '.';
165 elsif U_Id in Ada_Wide_Text_IO_Child then
166 Name_Buffer (17) := '.';
169 elsif U_Id in Interfaces_Child then
170 Name_Buffer (11) := '.';
172 elsif U_Id in System_Child then
173 Name_Buffer (7) := '.';
175 if U_Id in System_Tasking_Child then
176 Name_Buffer (15) := '.';
179 if U_Id in System_Tasking_Restricted_Child then
180 Name_Buffer (26) := '.';
183 if U_Id in System_Tasking_Protected_Objects_Child then
184 Name_Buffer (33) := '.';
187 if U_Id in System_Tasking_Async_Delays_Child then
188 Name_Buffer (28) := '.';
192 -- Add %s at end for spec
194 Name_Buffer (Name_Len + 1) := '%';
195 Name_Buffer (Name_Len + 2) := 's';
196 Name_Len := Name_Len + 2;
205 procedure Initialize is
207 -- Initialize the unit table
210 RT_Unit_Table (J).Entity := Empty;
214 RE_Table (J) := Empty;
222 function Is_RTE (Ent : Entity_Id; E : RE_Id) return Boolean is
223 E_Unit_Name : Unit_Name_Type;
224 Ent_Unit_Name : Unit_Name_Type;
234 -- If E has already a corresponding entity, check it directly,
235 -- going to full views if they exist to deal with the incomplete
236 -- and private type cases properly.
238 elsif Present (RE_Table (E)) then
241 if Is_Type (E1) and then Present (Full_View (E1)) then
242 E1 := Full_View (E1);
247 if Is_Type (E2) and then Present (Full_View (E2)) then
248 E2 := Full_View (E2);
254 -- If the unit containing E is not loaded, we already know that
255 -- the entity we have cannot have come from this unit.
257 E_Unit_Name := Get_Unit_Name (RE_Unit_Table (E));
259 if not Is_Loaded (E_Unit_Name) then
263 -- Here the unit containing the entity is loaded. We have not made
264 -- an explicit call to RTE to get the entity in question, but we may
265 -- have obtained a reference to it indirectly from some other entity
266 -- in the same unit, or some other unit that references it.
268 -- Get the defining unit of the entity
272 if Ekind (S) /= E_Package then
276 Ent_Unit_Name := Get_Unit_Name (Unit_Declaration_Node (S));
278 -- If the defining unit of the entity we are testing is not the
279 -- unit containing E, then they cannot possibly match.
281 if Ent_Unit_Name /= E_Unit_Name then
285 -- If the units match, then compare the names (remember that no
286 -- overloading is permitted in entities fetched using Rtsfind).
288 if RE_Chars (E) = Chars (Ent) then
291 -- If front-end inlining is enabled, we may be within a body that
292 -- contains inlined functions, which has not been retrieved through
293 -- rtsfind, and therefore is not yet recorded in the RT_Unit_Table.
294 -- Add the unit information now, it must be fully available.
297 U : RT_Unit_Table_Record
298 renames RT_Unit_Table (RE_Unit_Table (E));
300 if No (U.Entity) then
302 U.Uname := E_Unit_Name;
303 U.Unum := Get_Source_Unit (S);
313 ----------------------------
314 -- Is_Text_IO_Kludge_Unit --
315 ----------------------------
317 function Is_Text_IO_Kludge_Unit (Nam : Node_Id) return Boolean is
322 if Nkind (Nam) /= N_Expanded_Name then
327 Sel := Selector_Name (Nam);
329 if Nkind (Sel) /= N_Expanded_Name
330 or else Nkind (Prf) /= N_Identifier
331 or else Chars (Prf) /= Name_Ada
337 Sel := Selector_Name (Sel);
340 Nkind (Prf) = N_Identifier
342 (Chars (Prf) = Name_Text_IO or else Chars (Prf) = Name_Wide_Text_IO)
344 Nkind (Sel) = N_Identifier
346 Chars (Sel) in Text_IO_Package_Name;
348 end Is_Text_IO_Kludge_Unit;
354 procedure Load_Fail (S : String; U_Id : RTU_Id; Ent_Name : String := "") is
358 Write_Str ("fatal error: run-time library configuration error");
361 if Ent_Name /= "" then
362 Write_Str ("cannot locate """);
364 -- Copy name skipping initial RE_ or RO_XX characters
366 if Ent_Name (1 .. 2) = "RE" then
367 for J in 4 .. Ent_Name'Length loop
368 Name_Buffer (J - 3) := Ent_Name (J);
371 for J in 7 .. Ent_Name'Length loop
372 Name_Buffer (J - 6) := Ent_Name (J);
376 Name_Len := Ent_Name'Length - 3;
377 Set_Casing (Mixed_Case);
378 Write_Str (Name_Buffer (1 .. Name_Len));
379 Write_Str (""" in file """);
382 Write_Str ("cannot load file """);
386 (Get_File_Name (RT_Unit_Table (U_Id).Uname, Subunit => False));
392 raise Unrecoverable_Error;
399 procedure Load_RTU (U_Id : RTU_Id; Use_Setting : Boolean := False) is
401 U : RT_Unit_Table_Record renames RT_Unit_Table (U_Id);
402 Priv_Par : Elist_Id := New_Elmt_List;
405 procedure Save_Private_Visibility;
406 -- If the current unit is the body of child unit or the spec of a
407 -- private child unit, the private declarations of the parent (s)
408 -- are visible. If the unit to be loaded is another public sibling,
409 -- its compilation will affect the visibility of the common ancestors.
410 -- Indicate those that must be restored.
412 procedure Restore_Private_Visibility;
413 -- Restore the visibility of ancestors after compiling RTU.
415 --------------------------------
416 -- Restore_Private_Visibility --
417 --------------------------------
419 procedure Restore_Private_Visibility is
423 E_Par := First_Elmt (Priv_Par);
425 while Present (E_Par) loop
426 if not In_Private_Part (Node (E_Par)) then
427 Install_Private_Declarations (Node (E_Par));
432 end Restore_Private_Visibility;
434 -----------------------------
435 -- Save_Private_Visibility --
436 -----------------------------
438 procedure Save_Private_Visibility is
442 Par := Scope (Current_Scope);
445 and then Par /= Standard_Standard
447 if Ekind (Par) = E_Package
448 and then Is_Compilation_Unit (Par)
449 and then In_Private_Part (Par)
451 Append_Elmt (Par, Priv_Par);
456 end Save_Private_Visibility;
458 -- Start of processing for Load_RTU
461 -- Nothing to do if unit is already loaded
463 if Present (U.Entity) then
467 -- Otherwise we need to load the unit, First build unit name
468 -- from the enumeration literal name in type RTU_Id.
470 U.Uname := Get_Unit_Name (U_Id);
472 Loaded := Is_Loaded (U.Uname);
474 -- Now do the load call, note that setting Error_Node to Empty is
475 -- a signal to Load_Unit that we will regard a failure to find the
476 -- file as a fatal error, and that it should not output any kind
477 -- of diagnostics, since we will take care of it here.
481 (Load_Name => U.Uname,
484 Error_Node => Empty);
486 if U.Unum = No_Unit then
487 Load_Fail ("unit not found", U_Id);
489 elsif Fatal_Error (U.Unum) then
490 Load_Fail ("parser errors", U_Id);
493 -- Make sure that the unit is analyzed
496 Was_Analyzed : Boolean := Analyzed (Cunit (Current_Sem_Unit));
499 -- Pretend that the current unit is analysed, in case it is
500 -- System or some such. This allows us to put some declarations,
501 -- such as exceptions and packed arrays of Boolean, into System
502 -- even though expanding them requires System...
504 -- This is a bit odd but works fine. If the RTS unit does not depend
505 -- in any way on the current unit, then it never gets back into the
506 -- current unit's tree, and the change we make to the current unit
507 -- tree is never noticed by anyone (it is undone in a moment). That
508 -- is the normal situation.
510 -- If the RTS Unit *does* depend on the current unit, for instance,
511 -- when you are compiling System, then you had better have finished
512 -- Analyzing the part of System that is depended on before you try
513 -- to load the RTS Unit. This means having the System ordered in an
514 -- appropriate manner.
516 Set_Analyzed (Cunit (Current_Sem_Unit), True);
518 if not Analyzed (Cunit (U.Unum)) then
520 Save_Private_Visibility;
521 Semantics (Cunit (U.Unum));
522 Restore_Private_Visibility;
524 if Fatal_Error (U.Unum) then
525 Load_Fail ("semantic errors", U_Id);
531 Set_Analyzed (Cunit (Current_Sem_Unit), Was_Analyzed);
534 Lib_Unit := Unit (Cunit (U.Unum));
535 U.Entity := Defining_Entity (Lib_Unit);
538 Set_Is_Potentially_Use_Visible (U.Entity, True);
546 function RE_Chars (E : RE_Id) return Name_Id is
547 RE_Name_Chars : constant String := RE_Id'Image (E);
550 -- Copy name skipping initial RE_ or RO_XX characters
552 if RE_Name_Chars (1 .. 2) = "RE" then
553 for J in 4 .. RE_Name_Chars'Last loop
554 Name_Buffer (J - 3) := Fold_Lower (RE_Name_Chars (J));
557 Name_Len := RE_Name_Chars'Length - 3;
560 for J in 7 .. RE_Name_Chars'Last loop
561 Name_Buffer (J - 6) := Fold_Lower (RE_Name_Chars (J));
564 Name_Len := RE_Name_Chars'Length - 6;
574 function RTE (E : RE_Id) return Entity_Id is
575 U_Id : constant RTU_Id := RE_Unit_Table (E);
576 U : RT_Unit_Table_Record renames RT_Unit_Table (U_Id);
582 Ravenscar : constant Boolean := Restricted_Profile;
584 -- The following flag is used to disable front-end inlining when RTE
585 -- is invoked. This prevents the analysis of other runtime bodies when
586 -- a particular spec is loaded through Rtsfind. This is both efficient,
587 -- and it prevents spurious visibility conflicts between use-visible
588 -- user entities, and entities in run-time packages.
590 -- In No_Run_Time mode, subprograms marked Inlined_Always must be
591 -- inlined, so in the case we retain the Front_End_Inlining mode.
593 Save_Front_End_Inlining : Boolean;
596 -- Reject programs that make use of distribution features not supported
597 -- on the current target. On such targets (VMS, Vxworks, others?) we
598 -- only provide a minimal body for System.Rpc that only supplies an
599 -- implementation of partition_id.
601 function Find_Local_Entity (E : RE_Id) return Entity_Id;
602 -- This function is used when entity E is in this compilation's main
603 -- unit. It gets the value from the already compiled declaration.
605 function Make_Unit_Name (N : Node_Id) return Node_Id;
606 -- If the unit is a child unit, build fully qualified name for use
613 procedure Check_RPC is
614 Body_Name : Unit_Name_Type;
615 Unum : Unit_Number_Type;
618 -- Bypass this check if debug flag -gnatdR set
620 if Debug_Flag_RR then
624 -- Otherwise we need the check if we are going after one of
625 -- the critical entities in System.RPC in stubs mode.
627 if (Distribution_Stub_Mode = Generate_Receiver_Stub_Body
629 Distribution_Stub_Mode = Generate_Caller_Stub_Body)
630 and then (E = RE_Do_Rpc
631 or else E = RE_Do_Apc
632 or else E = RE_Params_Stream_Type
633 or else E = RE_RPC_Receiver)
635 -- Load body of System.Rpc, and abort if this is the body that is
636 -- provided by GNAT, for which these features are not supported
637 -- on current target. We identify the gnat body by the presence
638 -- of a local entity called Gnat in the first declaration.
640 Lib_Unit := Unit (Cunit (U.Unum));
641 Body_Name := Get_Body_Name (Get_Unit_Name (Lib_Unit));
644 (Load_Name => Body_Name,
650 if Unum /= No_Unit then
652 Decls : List_Id := Declarations (Unit (Cunit (Unum)));
656 and then Nkind (First (Decls)) = N_Object_Declaration
658 Chars (Defining_Identifier (First (Decls))) = Name_Gnat
661 Write_Str ("distribution feature not supported");
663 raise Unrecoverable_Error;
670 ------------------------
671 -- Find_System_Entity --
672 ------------------------
674 function Find_Local_Entity (E : RE_Id) return Entity_Id is
675 RE_Str : String renames RE_Id'Image (E);
678 Save_Nam : constant String := Name_Buffer (1 .. Name_Len);
679 -- Save name buffer and length over call
682 Name_Len := Natural'Max (0, RE_Str'Length - 3);
683 Name_Buffer (1 .. Name_Len) :=
684 RE_Str (RE_Str'First + 3 .. RE_Str'Last);
686 Ent := Entity_Id (Get_Name_Table_Info (Name_Find));
688 Name_Len := Save_Nam'Length;
689 Name_Buffer (1 .. Name_Len) := Save_Nam;
692 end Find_Local_Entity;
698 function Make_Unit_Name (N : Node_Id) return Node_Id is
703 Nam := New_Reference_To (U.Entity, Standard_Location);
704 Scop := Scope (U.Entity);
706 if Nkind (N) = N_Defining_Program_Unit_Name then
707 while Scop /= Standard_Standard loop
709 Make_Expanded_Name (Standard_Location,
710 Chars => Chars (U.Entity),
711 Prefix => New_Reference_To (Scop, Standard_Location),
712 Selector_Name => Nam);
713 Set_Entity (Nam, U.Entity);
715 Scop := Scope (Scop);
722 -- Start of processing for RTE
726 -- Check violation of no run time and ravenscar mode
729 and then not OK_To_Use_In_No_Run_Time_Mode (U_Id)
732 or else not OK_To_Use_In_Ravenscar_Mode (U_Id)
734 Disallow_In_No_Run_Time_Mode (Current_Error_Node);
739 -- Doing a rtsfind in system.ads is special, as we cannot do this
740 -- when compiling System itself. So if we are compiling system then
741 -- we should already have acquired and processed the declaration
742 -- of the entity. The test is to see if this compilation's main unit
743 -- is System. If so, return the value from the already compiled
744 -- declaration and otherwise do a regular find.
746 -- Not pleasant, but these kinds of annoying recursion when
747 -- writing an Ada compiler in Ada have to be broken somewhere!
749 if Present (Main_Unit_Entity)
750 and then Chars (Main_Unit_Entity) = Name_System
751 and then Analyzed (Main_Unit_Entity)
752 and then not Is_Child_Unit (Main_Unit_Entity)
754 return Find_Local_Entity (E);
757 Save_Front_End_Inlining := Front_End_Inlining;
758 Front_End_Inlining := No_Run_Time;
760 -- Load unit if unit not previously loaded
762 if No (RE_Table (E)) then
764 Lib_Unit := Unit (Cunit (U.Unum));
766 -- In the subprogram case, we are all done, the entity we want
767 -- is the entity for the subprogram itself. Note that we do not
768 -- bother to check that it is the entity that was requested.
769 -- the only way that could fail to be the case is if runtime is
770 -- hopelessly misconfigured, and it isn't worth testing for this.
772 if Nkind (Lib_Unit) = N_Subprogram_Declaration then
773 RE_Table (E) := U.Entity;
775 -- Otherwise we must have the package case, and here we have to
776 -- search the package entity chain for the entity we want. The
777 -- entity we want must be present in this chain, or we have a
778 -- misconfigured runtime.
781 pragma Assert (Nkind (Lib_Unit) = N_Package_Declaration);
782 Ename := RE_Chars (E);
784 Pkg_Ent := First_Entity (U.Entity);
786 while Present (Pkg_Ent) loop
787 if Ename = Chars (Pkg_Ent) then
788 RE_Table (E) := Pkg_Ent;
793 Next_Entity (Pkg_Ent);
796 -- If we didn't find the unit we want, something is wrong
797 -- although in no run time mode, we already gave a suitable
798 -- message, and so we simply return Empty, and the caller must
799 -- be prepared to handle this if the RTE call is otherwise
800 -- possible in high integrity mode.
803 and then not OK_To_Use_In_No_Run_Time_Mode (U_Id)
805 Front_End_Inlining := Save_Front_End_Inlining;
809 Load_Fail ("entity not in package", U_Id, RE_Id'Image (E));
815 -- See if we have to generate a with for this entity. We generate
816 -- a with if the current unit is part of the extended main code
817 -- unit, and if we have not already added the with. The with is
818 -- added to the appropriate unit (the current one).
823 In_Extended_Main_Code_Unit (Cunit_Entity (Current_Sem_Unit))
832 Lib_Unit := Unit (Cunit (U.Unum));
834 Make_With_Clause (Standard_Location,
837 (Defining_Unit_Name (Specification (Lib_Unit))));
838 Set_Library_Unit (Withn, Cunit (U.Unum));
839 Set_Corresponding_Spec (Withn, U.Entity);
840 Set_First_Name (Withn, True);
841 Set_Implicit_With (Withn, True);
843 Mark_Rewrite_Insertion (Withn);
844 Append (Withn, Context_Items (Cunit (Current_Sem_Unit)));
848 Front_End_Inlining := Save_Front_End_Inlining;
856 procedure Text_IO_Kludge (Nam : Node_Id) is
859 type Name_Map_Type is array (Text_IO_Package_Name) of RTU_Id;
861 Name_Map : Name_Map_Type := Name_Map_Type'(
862 Name_Decimal_IO => Ada_Text_IO_Decimal_IO,
863 Name_Enumeration_IO => Ada_Text_IO_Enumeration_IO,
864 Name_Fixed_IO => Ada_Text_IO_Fixed_IO,
865 Name_Float_IO => Ada_Text_IO_Float_IO,
866 Name_Integer_IO => Ada_Text_IO_Integer_IO,
867 Name_Modular_IO => Ada_Text_IO_Modular_IO);
869 Wide_Name_Map : Name_Map_Type := Name_Map_Type'(
870 Name_Decimal_IO => Ada_Wide_Text_IO_Decimal_IO,
871 Name_Enumeration_IO => Ada_Wide_Text_IO_Enumeration_IO,
872 Name_Fixed_IO => Ada_Wide_Text_IO_Fixed_IO,
873 Name_Float_IO => Ada_Wide_Text_IO_Float_IO,
874 Name_Integer_IO => Ada_Wide_Text_IO_Integer_IO,
875 Name_Modular_IO => Ada_Wide_Text_IO_Modular_IO);
878 -- Nothing to do if name is not identifier or a selected component
879 -- whose selector_name is not an identifier.
881 if Nkind (Nam) = N_Identifier then
884 elsif Nkind (Nam) = N_Selected_Component
885 and then Nkind (Selector_Name (Nam)) = N_Identifier
887 Chrs := Chars (Selector_Name (Nam));
893 -- Nothing to do if name is not one of the Text_IO subpackages
894 -- Otherwise look through loaded units, and if we find Text_IO
895 -- or Wide_Text_IO already loaded, then load the proper child.
897 if Chrs in Text_IO_Package_Name then
898 for U in Main_Unit .. Last_Unit loop
899 Get_Name_String (Unit_File_Name (U));
901 if Name_Len = 12 then
903 -- Here is where we do the loads if we find one of the
904 -- units Ada.Text_IO or Ada.Wide_Text_IO. An interesting
905 -- detail is that these units may already be used (i.e.
906 -- their In_Use flags may be set). Normally when the In_Use
907 -- flag is set, the Is_Potentially_Use_Visible flag of all
908 -- entities in the package is set, but the new entity we
909 -- are mysteriously adding was not there to have its flag
910 -- set at the time. So that's why we pass the extra parameter
911 -- to RTU_Find, to make sure the flag does get set now.
912 -- Given that those generic packages are in fact child units,
913 -- we must indicate that they are visible.
915 if Name_Buffer (1 .. 12) = "a-textio.ads" then
916 Load_RTU (Name_Map (Chrs), In_Use (Cunit_Entity (U)));
917 Set_Is_Visible_Child_Unit
918 (RT_Unit_Table (Name_Map (Chrs)).Entity);
920 elsif Name_Buffer (1 .. 12) = "a-witeio.ads" then
921 Load_RTU (Wide_Name_Map (Chrs), In_Use (Cunit_Entity (U)));
922 Set_Is_Visible_Child_Unit
923 (RT_Unit_Table (Wide_Name_Map (Chrs)).Entity);