1 ------------------------------------------------------------------------------
3 -- GNAT COMPILER COMPONENTS --
9 -- Copyright (C) 1992-2006, 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, 51 Franklin Street, Fifth Floor, --
20 -- Boston, MA 02110-1301, 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 Errout
; use Errout
;
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_Dist
; use Sem_Dist
;
47 with Sem_Util
; use Sem_Util
;
48 with Sinfo
; use Sinfo
;
49 with Stand
; use Stand
;
50 with Snames
; use Snames
;
51 with Tbuild
; use Tbuild
;
52 with Uname
; use Uname
;
54 package body Rtsfind
is
56 RTE_Available_Call
: Boolean := False;
57 -- Set True during call to RTE from RTE_Available. Tells RTE to set
58 -- RTE_Is_Available to False rather than generating an error message.
60 RTE_Is_Available
: Boolean;
61 -- Set True by RTE_Available on entry. When RTE_Available_Call is set
62 -- True, set False if RTE would otherwise generate an error message.
68 -- The unit table has one entry for each unit included in the definition
69 -- of the type RTU_Id in the spec. The table entries are initialized in
70 -- Initialize to set the Entity field to Empty, indicating that the
71 -- corresponding unit has not yet been loaded. The fields are set when
72 -- a unit is loaded to contain the defining entity for the unit, the
73 -- unit name, and the unit number.
75 -- Note that a unit can be loaded either by a call to find an entity
76 -- within the unit (e.g. RTE), or by an explicit with of the unit. In
77 -- the latter case it is critical to make a call to Set_RTU_Loaded to
78 -- ensure that the entry in this table reflects the load.
80 type RT_Unit_Table_Record
is record
82 Uname
: Unit_Name_Type
;
83 Unum
: Unit_Number_Type
;
87 RT_Unit_Table
: array (RTU_Id
) of RT_Unit_Table_Record
;
89 --------------------------
90 -- Runtime Entity Table --
91 --------------------------
93 -- There is one entry in the runtime entity table for each entity that is
94 -- included in the definition of the RE_Id type in the spec. The entries
95 -- are set by Initialize_Rtsfind to contain Empty, indicating that the
96 -- entity has not yet been located. Once the entity is located for the
97 -- first time, its ID is stored in this array, so that subsequent calls
98 -- for the same entity can be satisfied immediately.
100 RE_Table
: array (RE_Id
) of Entity_Id
;
102 --------------------------
103 -- Generation of WITH's --
104 --------------------------
106 -- When a unit is implicitly loaded as a result of a call to RTE, it
107 -- is necessary to create an implicit WITH to ensure that the object
108 -- is correctly loaded by the binder. Such WITH statements are only
109 -- required when the request is from the extended main unit (if a
110 -- client needs a WITH, that will be taken care of when the client
113 -- We always attach the WITH to the main unit. This is not perfectly
114 -- accurate in terms of elaboration requirements, but it is close
115 -- enough, since the units that are accessed using rtsfind do not
116 -- have delicate elaboration requirements.
118 -- The flag Withed in the unit table record is initially set to False.
119 -- It is set True if a WITH has been generated for the main unit for
120 -- the corresponding unit.
122 -----------------------
123 -- Local Subprograms --
124 -----------------------
126 procedure Entity_Not_Defined
(Id
: RE_Id
);
127 -- Outputs error messages for an entity that is not defined in the
128 -- run-time library (the form of the error message is tailored for
129 -- no run time/configurable run time mode as required).
131 procedure Load_Fail
(S
: String; U_Id
: RTU_Id
; Id
: RE_Id
);
132 -- Internal procedure called if we can't sucessfully locate or
133 -- process a run-time unit. The parameters give information about
134 -- the error message to be given. S is a reason for failing to
135 -- compile the file and U_Id is the unit id. RE_Id is the RE_Id
136 -- originally passed to RTE. The message in S is one of the
140 -- "had parser errors"
141 -- "had semantic errors"
143 -- The "not found" case is treated specially in that it is considered
144 -- a normal situation in configurable run-time mode (and the message in
145 -- this case is suppressed unless we are operating in All_Errors_Mode).
147 function Get_Unit_Name
(U_Id
: RTU_Id
) return Unit_Name_Type
;
148 -- Retrieves the Unit Name given a unit id represented by its
149 -- enumeration value in RTU_Id.
153 Id
: RE_Id
:= RE_Null
;
154 Use_Setting
: Boolean := False);
155 -- Load the unit whose Id is given if not already loaded. The unit is
156 -- loaded, analyzed, and added to the WITH list, and the entry in
157 -- RT_Unit_Table is updated to reflect the load. Use_Setting is used
158 -- to indicate the initial setting for the Is_Potentially_Use_Visible
159 -- flag of the entity for the loaded unit (if it is indeed loaded).
160 -- A value of False means nothing special need be done. A value of
161 -- True indicates that this flag must be set to True. It is needed
162 -- only in the Text_IO_Kludge procedure, which may materialize an
163 -- entity of Text_IO (or [Wide_]Wide_Text_IO) that was previously unknown.
164 -- Id is the RE_Id value of the entity which was originally requested.
165 -- Id is used only for error message detail, and if it is RE_Null, then
166 -- the attempt to output the entity name is ignored.
168 procedure Output_Entity_Name
(Id
: RE_Id
; Msg
: String);
169 -- Output continuation error message giving qualified name of entity
170 -- corresponding to Id, appending the string given by Msg. This call
171 -- is only effective in All_Errors mode.
173 function RE_Chars
(E
: RE_Id
) return Name_Id
;
174 -- Given a RE_Id value returns the Chars of the corresponding entity
176 procedure RTE_Error_Msg
(Msg
: String);
177 -- Generates a message by calling Error_Msg_N specifying Current_Error_Node
178 -- as the node location using the given Msg text. Special processing in the
179 -- case where RTE_Available_Call is set. In this case, no message is output
180 -- and instead RTE_Is_Available is set to False. Note that this can only be
181 -- used if you are sure that the message comes directly or indirectly from
182 -- a call to the RTE function.
184 ------------------------
185 -- Entity_Not_Defined --
186 ------------------------
188 procedure Entity_Not_Defined
(Id
: RE_Id
) is
190 if No_Run_Time_Mode
then
192 -- If the error occurs when compiling the body of a predefined
193 -- unit for inlining purposes, the body must be illegal in this
194 -- mode, and there is no point in continuing.
196 if Is_Predefined_File_Name
197 (Unit_File_Name
(Get_Source_Unit
(Sloc
(Current_Error_Node
))))
200 ("construct not allowed in no run time mode!",
202 raise Unrecoverable_Error
;
205 RTE_Error_Msg
("|construct not allowed in no run time mode");
208 elsif Configurable_Run_Time_Mode
then
209 RTE_Error_Msg
("|construct not allowed in this configuration>");
211 RTE_Error_Msg
("run-time configuration error");
214 Output_Entity_Name
(Id
, "not defined");
215 end Entity_Not_Defined
;
221 function Get_Unit_Name
(U_Id
: RTU_Id
) return Unit_Name_Type
is
222 Uname_Chars
: constant String := RTU_Id
'Image (U_Id
);
225 Name_Len
:= Uname_Chars
'Length;
226 Name_Buffer
(1 .. Name_Len
) := Uname_Chars
;
227 Set_Casing
(All_Lower_Case
);
229 if U_Id
in Ada_Child
then
230 Name_Buffer
(4) := '.';
232 if U_Id
in Ada_Calendar_Child
then
233 Name_Buffer
(13) := '.';
235 elsif U_Id
in Ada_Finalization_Child
then
236 Name_Buffer
(17) := '.';
238 elsif U_Id
in Ada_Interrupts_Child
then
239 Name_Buffer
(15) := '.';
241 elsif U_Id
in Ada_Real_Time_Child
then
242 Name_Buffer
(14) := '.';
244 elsif U_Id
in Ada_Streams_Child
then
245 Name_Buffer
(12) := '.';
247 elsif U_Id
in Ada_Text_IO_Child
then
248 Name_Buffer
(12) := '.';
250 elsif U_Id
in Ada_Wide_Text_IO_Child
then
251 Name_Buffer
(17) := '.';
253 elsif U_Id
in Ada_Wide_Wide_Text_IO_Child
then
254 Name_Buffer
(22) := '.';
257 elsif U_Id
in Interfaces_Child
then
258 Name_Buffer
(11) := '.';
260 elsif U_Id
in System_Child
then
261 Name_Buffer
(7) := '.';
263 if U_Id
in System_Tasking_Child
then
264 Name_Buffer
(15) := '.';
267 if U_Id
in System_Tasking_Restricted_Child
then
268 Name_Buffer
(26) := '.';
271 if U_Id
in System_Tasking_Protected_Objects_Child
then
272 Name_Buffer
(33) := '.';
275 if U_Id
in System_Tasking_Async_Delays_Child
then
276 Name_Buffer
(28) := '.';
280 -- Add %s at end for spec
282 Name_Buffer
(Name_Len
+ 1) := '%';
283 Name_Buffer
(Name_Len
+ 2) := 's';
284 Name_Len
:= Name_Len
+ 2;
293 procedure Initialize
is
295 -- Initialize the unit table
298 RT_Unit_Table
(J
).Entity
:= Empty
;
302 RE_Table
(J
) := Empty
;
305 RTE_Is_Available
:= False;
312 function Is_RTE
(Ent
: Entity_Id
; E
: RE_Id
) return Boolean is
313 E_Unit_Name
: Unit_Name_Type
;
314 Ent_Unit_Name
: Unit_Name_Type
;
324 -- If E has already a corresponding entity, check it directly,
325 -- going to full views if they exist to deal with the incomplete
326 -- and private type cases properly.
328 elsif Present
(RE_Table
(E
)) then
331 if Is_Type
(E1
) and then Present
(Full_View
(E1
)) then
332 E1
:= Full_View
(E1
);
337 if Is_Type
(E2
) and then Present
(Full_View
(E2
)) then
338 E2
:= Full_View
(E2
);
344 -- If the unit containing E is not loaded, we already know that
345 -- the entity we have cannot have come from this unit.
347 E_Unit_Name
:= Get_Unit_Name
(RE_Unit_Table
(E
));
349 if not Is_Loaded
(E_Unit_Name
) then
353 -- Here the unit containing the entity is loaded. We have not made
354 -- an explicit call to RTE to get the entity in question, but we may
355 -- have obtained a reference to it indirectly from some other entity
356 -- in the same unit, or some other unit that references it.
358 -- Get the defining unit of the entity
362 if Ekind
(S
) /= E_Package
then
366 Ent_Unit_Name
:= Get_Unit_Name
(Unit_Declaration_Node
(S
));
368 -- If the defining unit of the entity we are testing is not the
369 -- unit containing E, then they cannot possibly match.
371 if Ent_Unit_Name
/= E_Unit_Name
then
375 -- If the units match, then compare the names (remember that no
376 -- overloading is permitted in entities fetched using Rtsfind).
378 if RE_Chars
(E
) = Chars
(Ent
) then
381 -- If front-end inlining is enabled, we may be within a body that
382 -- contains inlined functions, which has not been retrieved through
383 -- rtsfind, and therefore is not yet recorded in the RT_Unit_Table.
384 -- Add the unit information now, it must be fully available.
387 U
: RT_Unit_Table_Record
388 renames RT_Unit_Table
(RE_Unit_Table
(E
));
390 if No
(U
.Entity
) then
392 U
.Uname
:= E_Unit_Name
;
393 U
.Unum
:= Get_Source_Unit
(S
);
407 function Is_RTU
(Ent
: Entity_Id
; U
: RTU_Id
) return Boolean is
408 E
: constant Entity_Id
:= RT_Unit_Table
(U
).Entity
;
410 return Present
(E
) and then E
= Ent
;
413 ----------------------------
414 -- Is_Text_IO_Kludge_Unit --
415 ----------------------------
417 function Is_Text_IO_Kludge_Unit
(Nam
: Node_Id
) return Boolean is
422 if Nkind
(Nam
) /= N_Expanded_Name
then
427 Sel
:= Selector_Name
(Nam
);
429 if Nkind
(Sel
) /= N_Expanded_Name
430 or else Nkind
(Prf
) /= N_Identifier
431 or else Chars
(Prf
) /= Name_Ada
437 Sel
:= Selector_Name
(Sel
);
440 Nkind
(Prf
) = N_Identifier
442 (Chars
(Prf
) = Name_Text_IO
444 Chars
(Prf
) = Name_Wide_Text_IO
446 Chars
(Prf
) = Name_Wide_Wide_Text_IO
)
448 Nkind
(Sel
) = N_Identifier
450 Chars
(Sel
) in Text_IO_Package_Name
;
451 end Is_Text_IO_Kludge_Unit
;
457 procedure Load_Fail
(S
: String; U_Id
: RTU_Id
; Id
: RE_Id
) is
458 M
: String (1 .. 100);
462 -- Output header message
464 if Configurable_Run_Time_Mode
then
465 RTE_Error_Msg
("construct not allowed in configurable run-time mode");
467 RTE_Error_Msg
("run-time library configuration error");
470 -- Output file name and reason string
473 or else not Configurable_Run_Time_Mode
474 or else All_Errors_Mode
476 M
(1 .. 6) := "\file ";
480 (Get_File_Name
(RT_Unit_Table
(U_Id
).Uname
, Subunit
=> False));
481 M
(P
+ 1 .. P
+ Name_Len
) := Name_Buffer
(1 .. Name_Len
);
487 M
(P
+ 1 .. P
+ S
'Length) := S
;
490 RTE_Error_Msg
(M
(1 .. P
));
492 -- Output entity name
494 Output_Entity_Name
(Id
, "not available");
497 raise RE_Not_Available
;
506 Id
: RE_Id
:= RE_Null
;
507 Use_Setting
: Boolean := False)
509 U
: RT_Unit_Table_Record
renames RT_Unit_Table
(U_Id
);
510 Priv_Par
: constant Elist_Id
:= New_Elmt_List
;
513 procedure Save_Private_Visibility
;
514 -- If the current unit is the body of child unit or the spec of a
515 -- private child unit, the private declarations of the parent (s)
516 -- are visible. If the unit to be loaded is another public sibling,
517 -- its compilation will affect the visibility of the common ancestors.
518 -- Indicate those that must be restored.
520 procedure Restore_Private_Visibility
;
521 -- Restore the visibility of ancestors after compiling RTU
523 --------------------------------
524 -- Restore_Private_Visibility --
525 --------------------------------
527 procedure Restore_Private_Visibility
is
531 E_Par
:= First_Elmt
(Priv_Par
);
533 while Present
(E_Par
) loop
534 if not In_Private_Part
(Node
(E_Par
)) then
535 Install_Private_Declarations
(Node
(E_Par
));
540 end Restore_Private_Visibility
;
542 -----------------------------
543 -- Save_Private_Visibility --
544 -----------------------------
546 procedure Save_Private_Visibility
is
550 Par
:= Scope
(Current_Scope
);
553 and then Par
/= Standard_Standard
555 if Ekind
(Par
) = E_Package
556 and then Is_Compilation_Unit
(Par
)
557 and then In_Private_Part
(Par
)
559 Append_Elmt
(Par
, Priv_Par
);
564 end Save_Private_Visibility
;
566 -- Start of processing for Load_RTU
569 -- Nothing to do if unit is already loaded
571 if Present
(U
.Entity
) then
575 -- Note if secondary stack is used
577 if U_Id
= System_Secondary_Stack
then
578 Opt
.Sec_Stack_Used
:= True;
581 -- Otherwise we need to load the unit, First build unit name
582 -- from the enumeration literal name in type RTU_Id.
584 U
.Uname
:= Get_Unit_Name
(U_Id
);
589 pragma Warnings
(Off
, Loaded
);
591 Loaded
:= Is_Loaded
(U
.Uname
);
594 -- Now do the load call, note that setting Error_Node to Empty is
595 -- a signal to Load_Unit that we will regard a failure to find the
596 -- file as a fatal error, and that it should not output any kind
597 -- of diagnostics, since we will take care of it here.
601 (Load_Name
=> U
.Uname
,
604 Error_Node
=> Empty
);
606 if U
.Unum
= No_Unit
then
607 Load_Fail
("not found", U_Id
, Id
);
608 elsif Fatal_Error
(U
.Unum
) then
609 Load_Fail
("had parser errors", U_Id
, Id
);
612 -- Make sure that the unit is analyzed
615 Was_Analyzed
: constant Boolean :=
616 Analyzed
(Cunit
(Current_Sem_Unit
));
619 -- Pretend that the current unit is analyzed, in case it is System
620 -- or some such. This allows us to put some declarations, such as
621 -- exceptions and packed arrays of Boolean, into System even though
622 -- expanding them requires System...
624 -- This is a bit odd but works fine. If the RTS unit does not depend
625 -- in any way on the current unit, then it never gets back into the
626 -- current unit's tree, and the change we make to the current unit
627 -- tree is never noticed by anyone (it is undone in a moment). That
628 -- is the normal situation.
630 -- If the RTS Unit *does* depend on the current unit, for instance,
631 -- when you are compiling System, then you had better have finished
632 -- analyzing the part of System that is depended on before you try
633 -- to load the RTS Unit. This means having the System ordered in an
634 -- appropriate manner.
636 Set_Analyzed
(Cunit
(Current_Sem_Unit
), True);
638 if not Analyzed
(Cunit
(U
.Unum
)) then
639 Save_Private_Visibility
;
640 Semantics
(Cunit
(U
.Unum
));
641 Restore_Private_Visibility
;
643 if Fatal_Error
(U
.Unum
) then
644 Load_Fail
("had semantic errors", U_Id
, Id
);
650 Set_Analyzed
(Cunit
(Current_Sem_Unit
), Was_Analyzed
);
653 Lib_Unit
:= Unit
(Cunit
(U
.Unum
));
654 U
.Entity
:= Defining_Entity
(Lib_Unit
);
657 Set_Is_Potentially_Use_Visible
(U
.Entity
, True);
661 -----------------------
662 -- Output_Entity_Name --
663 ------------------------
665 procedure Output_Entity_Name
(Id
: RE_Id
; Msg
: String) is
666 M
: String (1 .. 2048);
668 -- M (1 .. P) is current message to be output
670 RE_Image
: constant String := RE_Id
'Image (Id
);
673 if Id
= RE_Null
or else not All_Errors_Mode
then
677 M
(1 .. 9) := "\entity """;
680 -- Add unit name to message, excluding %s or %b at end
682 Get_Name_String
(Get_Unit_Name
(RE_Unit_Table
(Id
)));
683 Name_Len
:= Name_Len
- 2;
684 Set_Casing
(Mixed_Case
);
685 M
(P
+ 1 .. P
+ Name_Len
) := Name_Buffer
(1 .. Name_Len
);
688 -- Add a qualifying period
693 -- Add entity name and closing quote to message
695 Name_Len
:= RE_Image
'Length - 3;
696 Name_Buffer
(1 .. Name_Len
) := RE_Image
(4 .. RE_Image
'Length);
697 Set_Casing
(Mixed_Case
);
698 M
(P
+ 1 .. P
+ Name_Len
) := Name_Buffer
(1 .. Name_Len
);
707 M
(P
+ 1 .. P
+ Msg
'Length) := Msg
;
710 -- Output message at current error node location
712 RTE_Error_Msg
(M
(1 .. P
));
713 end Output_Entity_Name
;
719 function RE_Chars
(E
: RE_Id
) return Name_Id
is
720 RE_Name_Chars
: constant String := RE_Id
'Image (E
);
723 -- Copy name skipping initial RE_ or RO_XX characters
725 if RE_Name_Chars
(1 .. 2) = "RE" then
726 for J
in 4 .. RE_Name_Chars
'Last loop
727 Name_Buffer
(J
- 3) := Fold_Lower
(RE_Name_Chars
(J
));
730 Name_Len
:= RE_Name_Chars
'Length - 3;
733 for J
in 7 .. RE_Name_Chars
'Last loop
734 Name_Buffer
(J
- 6) := Fold_Lower
(RE_Name_Chars
(J
));
737 Name_Len
:= RE_Name_Chars
'Length - 6;
747 function RTE
(E
: RE_Id
) return Entity_Id
is
748 U_Id
: constant RTU_Id
:= RE_Unit_Table
(E
);
749 U
: RT_Unit_Table_Record
renames RT_Unit_Table
(U_Id
);
755 -- The following flag is used to disable front-end inlining when RTE
756 -- is invoked. This prevents the analysis of other runtime bodies when
757 -- a particular spec is loaded through Rtsfind. This is both efficient,
758 -- and it prevents spurious visibility conflicts between use-visible
759 -- user entities, and entities in run-time packages.
761 -- In configurable run-time mode, subprograms marked Inlined_Always must
762 -- be inlined, so in the case we retain the Front_End_Inlining mode.
764 Save_Front_End_Inlining
: Boolean;
766 function Check_CRT
(Eid
: Entity_Id
) return Entity_Id
;
767 -- Check entity Eid to ensure that configurable run-time restrictions
768 -- are met. May generate an error message and raise RE_Not_Available
769 -- if the entity E does not exist (i.e. Eid is Empty)
772 -- Reject programs that make use of distribution features not supported
773 -- on the current target. On such targets (VMS, Vxworks, others?) we
774 -- only provide a minimal body for System.Rpc that only supplies an
775 -- implementation of partition_id.
777 function Find_Local_Entity
(E
: RE_Id
) return Entity_Id
;
778 -- This function is used when entity E is in this compilation's main
779 -- unit. It gets the value from the already compiled declaration.
781 function Make_Unit_Name
(N
: Node_Id
) return Node_Id
;
782 -- If the unit is a child unit, build fully qualified name for use
789 function Check_CRT
(Eid
: Entity_Id
) return Entity_Id
is
792 Entity_Not_Defined
(E
);
793 raise RE_Not_Available
;
795 -- Entity is available
798 -- If in No_Run_Time mode and entity is not in one of the
799 -- specially permitted units, raise the exception.
802 and then not OK_No_Run_Time_Unit
(U_Id
)
804 Entity_Not_Defined
(E
);
805 raise RE_Not_Available
;
808 -- Otherwise entity is accessible
818 procedure Check_RPC
is
820 -- Bypass this check if debug flag -gnatdR set
822 if Debug_Flag_RR
then
826 -- Otherwise we need the check if we are going after one of
827 -- the critical entities in System.RPC in stubs mode.
829 -- ??? Should we do this for other s-parint entities too?
831 if (Distribution_Stub_Mode
= Generate_Receiver_Stub_Body
833 Distribution_Stub_Mode
= Generate_Caller_Stub_Body
)
834 and then (E
= RE_Do_Rpc
838 E
= RE_Params_Stream_Type
840 E
= RE_Request_Access
)
841 and then Get_PCS_Name
= Name_No_DSA
844 Write_Str
("distribution feature not supported");
846 raise Unrecoverable_Error
;
850 ------------------------
851 -- Find_System_Entity --
852 ------------------------
854 function Find_Local_Entity
(E
: RE_Id
) return Entity_Id
is
855 RE_Str
: String renames RE_Id
'Image (E
);
858 Save_Nam
: constant String := Name_Buffer
(1 .. Name_Len
);
859 -- Save name buffer and length over call
862 Name_Len
:= Natural'Max (0, RE_Str
'Length - 3);
863 Name_Buffer
(1 .. Name_Len
) :=
864 RE_Str
(RE_Str
'First + 3 .. RE_Str
'Last);
866 Ent
:= Entity_Id
(Get_Name_Table_Info
(Name_Find
));
868 Name_Len
:= Save_Nam
'Length;
869 Name_Buffer
(1 .. Name_Len
) := Save_Nam
;
872 end Find_Local_Entity
;
878 function Make_Unit_Name
(N
: Node_Id
) return Node_Id
is
883 Nam
:= New_Reference_To
(U
.Entity
, Standard_Location
);
884 Scop
:= Scope
(U
.Entity
);
886 if Nkind
(N
) = N_Defining_Program_Unit_Name
then
887 while Scop
/= Standard_Standard
loop
889 Make_Expanded_Name
(Standard_Location
,
890 Chars
=> Chars
(U
.Entity
),
891 Prefix
=> New_Reference_To
(Scop
, Standard_Location
),
892 Selector_Name
=> Nam
);
893 Set_Entity
(Nam
, U
.Entity
);
895 Scop
:= Scope
(Scop
);
902 -- Start of processing for RTE
905 -- Doing a rtsfind in system.ads is special, as we cannot do this
906 -- when compiling System itself. So if we are compiling system then
907 -- we should already have acquired and processed the declaration
908 -- of the entity. The test is to see if this compilation's main unit
909 -- is System. If so, return the value from the already compiled
910 -- declaration and otherwise do a regular find.
912 -- Not pleasant, but these kinds of annoying recursion when
913 -- writing an Ada compiler in Ada have to be broken somewhere!
915 if Present
(Main_Unit_Entity
)
916 and then Chars
(Main_Unit_Entity
) = Name_System
917 and then Analyzed
(Main_Unit_Entity
)
918 and then not Is_Child_Unit
(Main_Unit_Entity
)
920 return Check_CRT
(Find_Local_Entity
(E
));
923 Save_Front_End_Inlining
:= Front_End_Inlining
;
924 Front_End_Inlining
:= Configurable_Run_Time_Mode
;
926 -- Load unit if unit not previously loaded
928 if No
(RE_Table
(E
)) then
929 Load_RTU
(U_Id
, Id
=> E
);
930 Lib_Unit
:= Unit
(Cunit
(U
.Unum
));
932 -- In the subprogram case, we are all done, the entity we want
933 -- is the entity for the subprogram itself. Note that we do not
934 -- bother to check that it is the entity that was requested.
935 -- the only way that could fail to be the case is if runtime is
936 -- hopelessly misconfigured, and it isn't worth testing for this.
938 if Nkind
(Lib_Unit
) = N_Subprogram_Declaration
then
939 RE_Table
(E
) := U
.Entity
;
941 -- Otherwise we must have the package case. First check package
942 -- entity itself (e.g. RTE_Name for System.Interrupts.Name)
945 pragma Assert
(Nkind
(Lib_Unit
) = N_Package_Declaration
);
946 Ename
:= RE_Chars
(E
);
948 -- First we search the package entity chain
950 Pkg_Ent
:= First_Entity
(U
.Entity
);
951 while Present
(Pkg_Ent
) loop
952 if Ename
= Chars
(Pkg_Ent
) then
953 RE_Table
(E
) := Pkg_Ent
;
958 Next_Entity
(Pkg_Ent
);
961 -- If we did not find the entity in the package entity chain,
962 -- then check if the package entity itself matches. Note that
963 -- we do this check after searching the entity chain, since
964 -- the rule is that in case of ambiguity, we prefer the entity
965 -- defined within the package, rather than the package itself.
967 if Ename
= Chars
(U
.Entity
) then
968 RE_Table
(E
) := U
.Entity
;
971 -- If we didn't find the entity we want, something is wrong.
972 -- We just leave RE_Table (E) set to Empty and the appropriate
973 -- action will be taken by Check_CRT when we exit.
978 -- See if we have to generate a WITH for this entity. We generate
979 -- a WITH if the current unit is part of the extended main code
980 -- unit, and if we have not already added the with. The WITH is
981 -- added to the appropriate unit (the current one). We do not need
982 -- to generate a WITH for an ????
987 In_Extended_Main_Code_Unit
(Cunit_Entity
(Current_Sem_Unit
))
988 and then not RTE_Available_Call
997 Lib_Unit
:= Unit
(Cunit
(U
.Unum
));
999 Make_With_Clause
(Standard_Location
,
1002 (Defining_Unit_Name
(Specification
(Lib_Unit
))));
1003 Set_Library_Unit
(Withn
, Cunit
(U
.Unum
));
1004 Set_Corresponding_Spec
(Withn
, U
.Entity
);
1005 Set_First_Name
(Withn
, True);
1006 Set_Implicit_With
(Withn
, True);
1008 Mark_Rewrite_Insertion
(Withn
);
1009 Append
(Withn
, Context_Items
(Cunit
(Current_Sem_Unit
)));
1010 Check_Restriction_No_Dependence
(Name
(Withn
), Current_Error_Node
);
1014 Front_End_Inlining
:= Save_Front_End_Inlining
;
1015 return Check_CRT
(RE_Table
(E
));
1022 function RTE_Available
(E
: RE_Id
) return Boolean is
1024 pragma Warnings
(Off
, Dummy
);
1028 Save_RTE_Available_Call
: constant Boolean := RTE_Available_Call
;
1029 Save_RTE_Is_Available
: constant Boolean := RTE_Is_Available
;
1030 -- These are saved recursively because the call to load a unit
1031 -- caused by an upper level call may perform a recursive call
1032 -- to this routine during analysis of the corresponding unit.
1035 RTE_Available_Call
:= True;
1036 RTE_Is_Available
:= True;
1038 Result
:= RTE_Is_Available
;
1039 RTE_Available_Call
:= Save_RTE_Available_Call
;
1040 RTE_Is_Available
:= Save_RTE_Is_Available
;
1044 when RE_Not_Available
=>
1045 RTE_Available_Call
:= Save_RTE_Available_Call
;
1046 RTE_Is_Available
:= Save_RTE_Is_Available
;
1054 procedure RTE_Error_Msg
(Msg
: String) is
1056 if RTE_Available_Call
then
1057 RTE_Is_Available
:= False;
1059 Error_Msg_N
(Msg
, Current_Error_Node
);
1061 -- Bump count of violations if we are in configurable run-time
1062 -- mode and this is not a continuation message.
1064 if Configurable_Run_Time_Mode
and then Msg
(Msg
'First) /= '\' then
1065 Configurable_Run_Time_Violations
:=
1066 Configurable_Run_Time_Violations
+ 1;
1075 function RTU_Loaded
(U
: RTU_Id
) return Boolean is
1077 return Present
(RT_Unit_Table
(U
).Entity
);
1080 --------------------
1081 -- Set_RTU_Loaded --
1082 --------------------
1084 procedure Set_RTU_Loaded
(N
: Node_Id
) is
1085 Loc
: constant Source_Ptr
:= Sloc
(N
);
1086 Unum
: constant Unit_Number_Type
:= Get_Source_Unit
(Loc
);
1087 Uname
: constant Unit_Name_Type
:= Unit_Name
(Unum
);
1088 E
: constant Entity_Id
:=
1089 Defining_Entity
(Unit
(Cunit
(Unum
)));
1091 pragma Assert
(Is_Predefined_File_Name
(Unit_File_Name
(Unum
)));
1093 -- Loop through entries in RTU table looking for matching entry
1095 for U_Id
in RTU_Id
'Range loop
1097 -- Here we have a match
1099 if Get_Unit_Name
(U_Id
) = Uname
then
1101 U
: RT_Unit_Table_Record
renames RT_Unit_Table
(U_Id
);
1102 -- The RT_Unit_Table entry that may need updating
1105 -- If entry is not set, set it now
1107 if No
(U
.Entity
) then
1109 U
.Uname
:= Get_Unit_Name
(U_Id
);
1120 --------------------
1121 -- Text_IO_Kludge --
1122 --------------------
1124 procedure Text_IO_Kludge
(Nam
: Node_Id
) is
1127 type Name_Map_Type
is array (Text_IO_Package_Name
) of RTU_Id
;
1129 Name_Map
: constant Name_Map_Type
:= Name_Map_Type
'(
1130 Name_Decimal_IO => Ada_Text_IO_Decimal_IO,
1131 Name_Enumeration_IO => Ada_Text_IO_Enumeration_IO,
1132 Name_Fixed_IO => Ada_Text_IO_Fixed_IO,
1133 Name_Float_IO => Ada_Text_IO_Float_IO,
1134 Name_Integer_IO => Ada_Text_IO_Integer_IO,
1135 Name_Modular_IO => Ada_Text_IO_Modular_IO);
1137 Wide_Name_Map : constant Name_Map_Type := Name_Map_Type'(
1138 Name_Decimal_IO
=> Ada_Wide_Text_IO_Decimal_IO
,
1139 Name_Enumeration_IO
=> Ada_Wide_Text_IO_Enumeration_IO
,
1140 Name_Fixed_IO
=> Ada_Wide_Text_IO_Fixed_IO
,
1141 Name_Float_IO
=> Ada_Wide_Text_IO_Float_IO
,
1142 Name_Integer_IO
=> Ada_Wide_Text_IO_Integer_IO
,
1143 Name_Modular_IO
=> Ada_Wide_Text_IO_Modular_IO
);
1145 Wide_Wide_Name_Map
: constant Name_Map_Type
:= Name_Map_Type
'(
1146 Name_Decimal_IO => Ada_Wide_Wide_Text_IO_Decimal_IO,
1147 Name_Enumeration_IO => Ada_Wide_Wide_Text_IO_Enumeration_IO,
1148 Name_Fixed_IO => Ada_Wide_Wide_Text_IO_Fixed_IO,
1149 Name_Float_IO => Ada_Wide_Wide_Text_IO_Float_IO,
1150 Name_Integer_IO => Ada_Wide_Wide_Text_IO_Integer_IO,
1151 Name_Modular_IO => Ada_Wide_Wide_Text_IO_Modular_IO);
1154 -- Nothing to do if name is not identifier or a selected component
1155 -- whose selector_name is not an identifier.
1157 if Nkind (Nam) = N_Identifier then
1158 Chrs := Chars (Nam);
1160 elsif Nkind (Nam) = N_Selected_Component
1161 and then Nkind (Selector_Name (Nam)) = N_Identifier
1163 Chrs := Chars (Selector_Name (Nam));
1169 -- Nothing to do if name is not one of the Text_IO subpackages
1170 -- Otherwise look through loaded units, and if we find Text_IO
1171 -- or [Wide_]Wide_Text_IO already loaded, then load the proper child.
1173 if Chrs in Text_IO_Package_Name then
1174 for U in Main_Unit .. Last_Unit loop
1175 Get_Name_String (Unit_File_Name (U));
1177 if Name_Len = 12 then
1179 -- Here is where we do the loads if we find one of the units
1180 -- Ada.Text_IO or Ada.[Wide_]Wide_Text_IO. An interesting
1181 -- detail is that these units may already be used (i.e. their
1182 -- In_Use flags may be set). Normally when the In_Use flag is
1183 -- set, the Is_Potentially_Use_Visible flag of all entities in
1184 -- the package is set, but the new entity we are mysteriously
1185 -- adding was not there to have its flag set at the time. So
1186 -- that's why we pass the extra parameter to RTU_Find, to make
1187 -- sure the flag does get set now. Given that those generic
1188 -- packages are in fact child units, we must indicate that
1189 -- they are visible.
1191 if Name_Buffer (1 .. 12) = "a-textio.ads" then
1194 Use_Setting => In_Use (Cunit_Entity (U)));
1195 Set_Is_Visible_Child_Unit
1196 (RT_Unit_Table (Name_Map (Chrs)).Entity);
1198 elsif Name_Buffer (1 .. 12) = "a-witeio.ads" then
1200 (Wide_Name_Map (Chrs),
1201 Use_Setting => In_Use (Cunit_Entity (U)));
1202 Set_Is_Visible_Child_Unit
1203 (RT_Unit_Table (Wide_Name_Map (Chrs)).Entity);
1205 elsif Name_Buffer (1 .. 12) = "a-ztexio.ads" then
1207 (Wide_Wide_Name_Map (Chrs),
1208 Use_Setting => In_Use (Cunit_Entity (U)));
1209 Set_Is_Visible_Child_Unit
1210 (RT_Unit_Table (Wide_Wide_Name_Map (Chrs)).Entity);