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70482933 RK |
1 | ------------------------------------------------------------------------------ |
2 | -- -- | |
3 | -- GNAT COMPILER COMPONENTS -- | |
4 | -- -- | |
5 | -- E X P _ D I S P -- | |
6 | -- -- | |
7 | -- B o d y -- | |
8 | -- -- | |
8d0d46f4 | 9 | -- Copyright (C) 1992-2021, Free Software Foundation, Inc. -- |
70482933 RK |
10 | -- -- |
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- -- | |
e18d6a15 | 13 | -- ware Foundation; either version 3, or (at your option) any later ver- -- |
70482933 RK |
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 -- | |
e18d6a15 JM |
18 | -- Public License distributed with GNAT; see file COPYING3. If not, go to -- |
19 | -- http://www.gnu.org/licenses for a complete copy of the license. -- | |
70482933 RK |
20 | -- -- |
21 | -- GNAT was originally developed by the GNAT team at New York University. -- | |
71ff80dc | 22 | -- Extensive contributions were provided by Ada Core Technologies Inc. -- |
70482933 RK |
23 | -- -- |
24 | ------------------------------------------------------------------------------ | |
25 | ||
26 | with Atree; use Atree; | |
27 | with Checks; use Checks; | |
758c442c | 28 | with Debug; use Debug; |
76f9c7f4 BD |
29 | with Einfo; use Einfo; |
30 | with Einfo.Entities; use Einfo.Entities; | |
31 | with Einfo.Utils; use Einfo.Utils; | |
70482933 RK |
32 | with Elists; use Elists; |
33 | with Errout; use Errout; | |
15529d0a | 34 | with Expander; use Expander; |
dee4682a | 35 | with Exp_Atag; use Exp_Atag; |
23b86353 | 36 | with Exp_Ch6; use Exp_Ch6; |
9c41193c | 37 | with Exp_CG; use Exp_CG; |
f4d379b8 | 38 | with Exp_Dbug; use Exp_Dbug; |
70482933 RK |
39 | with Exp_Tss; use Exp_Tss; |
40 | with Exp_Util; use Exp_Util; | |
bfef8d0d | 41 | with Freeze; use Freeze; |
8636f52f | 42 | with Ghost; use Ghost; |
70482933 | 43 | with Itypes; use Itypes; |
4da17013 | 44 | with Layout; use Layout; |
70482933 RK |
45 | with Nlists; use Nlists; |
46 | with Nmake; use Nmake; | |
758c442c | 47 | with Namet; use Namet; |
70482933 | 48 | with Opt; use Opt; |
758c442c | 49 | with Output; use Output; |
b0efe69e JM |
50 | with Restrict; use Restrict; |
51 | with Rident; use Rident; | |
70482933 | 52 | with Rtsfind; use Rtsfind; |
758c442c | 53 | with Sem; use Sem; |
a4100e55 | 54 | with Sem_Aux; use Sem_Aux; |
d0dd5209 | 55 | with Sem_Ch6; use Sem_Ch6; |
1923d2d6 | 56 | with Sem_Ch7; use Sem_Ch7; |
d0dd5209 | 57 | with Sem_Ch8; use Sem_Ch8; |
70482933 | 58 | with Sem_Disp; use Sem_Disp; |
d0dd5209 | 59 | with Sem_Eval; use Sem_Eval; |
70482933 | 60 | with Sem_Res; use Sem_Res; |
758c442c | 61 | with Sem_Type; use Sem_Type; |
70482933 | 62 | with Sem_Util; use Sem_Util; |
76f9c7f4 BD |
63 | with Sinfo; use Sinfo; |
64 | with Sinfo.Nodes; use Sinfo.Nodes; | |
65 | with Sinfo.Utils; use Sinfo.Utils; | |
304757d2 | 66 | with Sinput; use Sinput; |
70482933 RK |
67 | with Snames; use Snames; |
68 | with Stand; use Stand; | |
d0dd5209 | 69 | with Stringt; use Stringt; |
7665e4bd | 70 | with SCIL_LL; use SCIL_LL; |
70482933 | 71 | with Tbuild; use Tbuild; |
70482933 RK |
72 | |
73 | package body Exp_Disp is | |
74 | ||
d0dd5209 JM |
75 | ----------------------- |
76 | -- Local Subprograms -- | |
77 | ----------------------- | |
70482933 | 78 | |
b0efe69e | 79 | function Default_Prim_Op_Position (E : Entity_Id) return Uint; |
758c442c GD |
80 | -- Ada 2005 (AI-251): Returns the fixed position in the dispatch table |
81 | -- of the default primitive operations. | |
82 | ||
e18d6a15 JM |
83 | function Has_DT (Typ : Entity_Id) return Boolean; |
84 | pragma Inline (Has_DT); | |
85 | -- Returns true if we generate a dispatch table for tagged type Typ | |
86 | ||
bfef8d0d JM |
87 | function Is_Predefined_Dispatching_Alias (Prim : Entity_Id) return Boolean; |
88 | -- Returns true if Prim is not a predefined dispatching primitive but it is | |
8fc789c8 | 89 | -- an alias of a predefined dispatching primitive (i.e. through a renaming) |
bfef8d0d | 90 | |
5a1ccfb1 | 91 | function New_Value (From : Node_Id) return Node_Id; |
6782b1ef AC |
92 | -- From is the original Expression. New_Value is equivalent to a call to |
93 | -- Duplicate_Subexpr with an explicit dereference when From is an access | |
94 | -- parameter. | |
5a1ccfb1 | 95 | |
70482933 | 96 | function Original_View_In_Visible_Part (Typ : Entity_Id) return Boolean; |
6782b1ef AC |
97 | -- Check if the type has a private view or if the public view appears in |
98 | -- the visible part of a package spec. | |
70482933 | 99 | |
10b93b2e HK |
100 | function Prim_Op_Kind |
101 | (Prim : Entity_Id; | |
102 | Typ : Entity_Id) return Node_Id; | |
103 | -- Ada 2005 (AI-345): Determine the primitive operation kind of Prim | |
4d744221 | 104 | -- according to its type Typ. Return a reference to an RE_Prim_Op_Kind |
10b93b2e | 105 | -- enumeration value. |
758c442c | 106 | |
4d744221 JM |
107 | function Tagged_Kind (T : Entity_Id) return Node_Id; |
108 | -- Ada 2005 (AI-345): Determine the tagged kind of T and return a reference | |
109 | -- to an RE_Tagged_Kind enumeration value. | |
110 | ||
5a1ccfb1 AC |
111 | ---------------------- |
112 | -- Apply_Tag_Checks -- | |
113 | ---------------------- | |
114 | ||
115 | procedure Apply_Tag_Checks (Call_Node : Node_Id) is | |
116 | Loc : constant Source_Ptr := Sloc (Call_Node); | |
117 | Ctrl_Arg : constant Node_Id := Controlling_Argument (Call_Node); | |
118 | Ctrl_Typ : constant Entity_Id := Base_Type (Etype (Ctrl_Arg)); | |
119 | Param_List : constant List_Id := Parameter_Associations (Call_Node); | |
120 | ||
121 | Subp : Entity_Id; | |
122 | CW_Typ : Entity_Id; | |
123 | Param : Node_Id; | |
124 | Typ : Entity_Id; | |
125 | Eq_Prim_Op : Entity_Id := Empty; | |
126 | ||
127 | begin | |
128 | if No_Run_Time_Mode then | |
129 | Error_Msg_CRT ("tagged types", Call_Node); | |
130 | return; | |
131 | end if; | |
132 | ||
6782b1ef AC |
133 | -- Apply_Tag_Checks is called directly from the semantics, so we |
134 | -- need a check to see whether expansion is active before proceeding. | |
135 | -- In addition, there is no need to expand the call when compiling | |
136 | -- under restriction No_Dispatching_Calls; the semantic analyzer has | |
5a1ccfb1 AC |
137 | -- previously notified the violation of this restriction. |
138 | ||
139 | if not Expander_Active | |
140 | or else Restriction_Active (No_Dispatching_Calls) | |
141 | then | |
142 | return; | |
143 | end if; | |
144 | ||
145 | -- Set subprogram. If this is an inherited operation that was | |
146 | -- overridden, the body that is being called is its alias. | |
147 | ||
148 | Subp := Entity (Name (Call_Node)); | |
149 | ||
150 | if Present (Alias (Subp)) | |
151 | and then Is_Inherited_Operation (Subp) | |
152 | and then No (DTC_Entity (Subp)) | |
153 | then | |
154 | Subp := Alias (Subp); | |
155 | end if; | |
156 | ||
157 | -- Definition of the class-wide type and the tagged type | |
158 | ||
159 | -- If the controlling argument is itself a tag rather than a tagged | |
160 | -- object, then use the class-wide type associated with the subprogram's | |
161 | -- controlling type. This case can occur when a call to an inherited | |
162 | -- primitive has an actual that originated from a default parameter | |
163 | -- given by a tag-indeterminate call and when there is no other | |
164 | -- controlling argument providing the tag (AI-239 requires dispatching). | |
165 | -- This capability of dispatching directly by tag is also needed by the | |
166 | -- implementation of AI-260 (for the generic dispatching constructors). | |
167 | ||
3477e0b2 PT |
168 | if Is_RTE (Ctrl_Typ, RE_Tag) |
169 | or else Is_RTE (Ctrl_Typ, RE_Interface_Tag) | |
5a1ccfb1 AC |
170 | then |
171 | CW_Typ := Class_Wide_Type (Find_Dispatching_Type (Subp)); | |
172 | ||
173 | -- Class_Wide_Type is applied to the expressions used to initialize | |
174 | -- CW_Typ, to ensure that CW_Typ always denotes a class-wide type, since | |
175 | -- there are cases where the controlling type is resolved to a specific | |
176 | -- type (such as for designated types of arguments such as CW'Access). | |
177 | ||
178 | elsif Is_Access_Type (Ctrl_Typ) then | |
179 | CW_Typ := Class_Wide_Type (Designated_Type (Ctrl_Typ)); | |
180 | ||
181 | else | |
182 | CW_Typ := Class_Wide_Type (Ctrl_Typ); | |
183 | end if; | |
184 | ||
98ee6f8d | 185 | Typ := Find_Specific_Type (CW_Typ); |
5a1ccfb1 AC |
186 | |
187 | if not Is_Limited_Type (Typ) then | |
188 | Eq_Prim_Op := Find_Prim_Op (Typ, Name_Op_Eq); | |
189 | end if; | |
190 | ||
191 | -- Dispatching call to C++ primitive | |
192 | ||
193 | if Is_CPP_Class (Typ) then | |
194 | null; | |
195 | ||
196 | -- Dispatching call to Ada primitive | |
197 | ||
198 | elsif Present (Param_List) then | |
199 | ||
200 | -- Generate the Tag checks when appropriate | |
201 | ||
202 | Param := First_Actual (Call_Node); | |
203 | while Present (Param) loop | |
204 | ||
205 | -- No tag check with itself | |
206 | ||
207 | if Param = Ctrl_Arg then | |
208 | null; | |
209 | ||
210 | -- No tag check for parameter whose type is neither tagged nor | |
211 | -- access to tagged (for access parameters) | |
212 | ||
213 | elsif No (Find_Controlling_Arg (Param)) then | |
214 | null; | |
215 | ||
216 | -- No tag check for function dispatching on result if the | |
217 | -- Tag given by the context is this one | |
218 | ||
219 | elsif Find_Controlling_Arg (Param) = Ctrl_Arg then | |
220 | null; | |
221 | ||
6782b1ef AC |
222 | -- "=" is the only dispatching operation allowed to get operands |
223 | -- with incompatible tags (it just returns false). We use | |
224 | -- Duplicate_Subexpr_Move_Checks instead of calling Relocate_Node | |
225 | -- because the value will be duplicated to check the tags. | |
5a1ccfb1 AC |
226 | |
227 | elsif Subp = Eq_Prim_Op then | |
228 | null; | |
229 | ||
230 | -- No check in presence of suppress flags | |
231 | ||
232 | elsif Tag_Checks_Suppressed (Etype (Param)) | |
233 | or else (Is_Access_Type (Etype (Param)) | |
234 | and then Tag_Checks_Suppressed | |
235 | (Designated_Type (Etype (Param)))) | |
236 | then | |
237 | null; | |
238 | ||
239 | -- Optimization: no tag checks if the parameters are identical | |
240 | ||
241 | elsif Is_Entity_Name (Param) | |
242 | and then Is_Entity_Name (Ctrl_Arg) | |
243 | and then Entity (Param) = Entity (Ctrl_Arg) | |
244 | then | |
245 | null; | |
246 | ||
247 | -- Now we need to generate the Tag check | |
248 | ||
249 | else | |
250 | -- Generate code for tag equality check | |
6782b1ef | 251 | |
5a1ccfb1 AC |
252 | -- Perhaps should have Checks.Apply_Tag_Equality_Check??? |
253 | ||
254 | Insert_Action (Ctrl_Arg, | |
255 | Make_Implicit_If_Statement (Call_Node, | |
256 | Condition => | |
257 | Make_Op_Ne (Loc, | |
258 | Left_Opnd => | |
259 | Make_Selected_Component (Loc, | |
260 | Prefix => New_Value (Ctrl_Arg), | |
261 | Selector_Name => | |
e4494292 | 262 | New_Occurrence_Of |
5a1ccfb1 AC |
263 | (First_Tag_Component (Typ), Loc)), |
264 | ||
265 | Right_Opnd => | |
266 | Make_Selected_Component (Loc, | |
267 | Prefix => | |
268 | Unchecked_Convert_To (Typ, New_Value (Param)), | |
269 | Selector_Name => | |
e4494292 | 270 | New_Occurrence_Of |
5a1ccfb1 AC |
271 | (First_Tag_Component (Typ), Loc))), |
272 | ||
273 | Then_Statements => | |
274 | New_List (New_Constraint_Error (Loc)))); | |
275 | end if; | |
276 | ||
277 | Next_Actual (Param); | |
278 | end loop; | |
279 | end if; | |
280 | end Apply_Tag_Checks; | |
281 | ||
e18d6a15 JM |
282 | ------------------------ |
283 | -- Building_Static_DT -- | |
284 | ------------------------ | |
285 | ||
286 | function Building_Static_DT (Typ : Entity_Id) return Boolean is | |
6214b83b PMR |
287 | Root_Typ : Entity_Id := Root_Type (Typ); |
288 | Static_DT : Boolean; | |
f2cbd970 | 289 | |
e18d6a15 | 290 | begin |
f2cbd970 JM |
291 | -- Handle private types |
292 | ||
293 | if Present (Full_View (Root_Typ)) then | |
294 | Root_Typ := Full_View (Root_Typ); | |
295 | end if; | |
296 | ||
65e5747e PMR |
297 | Static_DT := |
298 | Building_Static_Dispatch_Tables | |
299 | and then Is_Library_Level_Tagged_Type (Typ) | |
6e818918 | 300 | |
65e5747e PMR |
301 | -- If the type is derived from a CPP class we cannot statically |
302 | -- build the dispatch tables because we must inherit primitives | |
303 | -- from the CPP side. | |
6e818918 | 304 | |
65e5747e | 305 | and then not Is_CPP_Class (Root_Typ); |
6214b83b PMR |
306 | |
307 | if not Static_DT then | |
308 | Check_Restriction (Static_Dispatch_Tables, Typ); | |
309 | end if; | |
310 | ||
311 | return Static_DT; | |
e18d6a15 JM |
312 | end Building_Static_DT; |
313 | ||
15529d0a PMR |
314 | ---------------------------------- |
315 | -- Building_Static_Secondary_DT -- | |
316 | ---------------------------------- | |
317 | ||
318 | function Building_Static_Secondary_DT (Typ : Entity_Id) return Boolean is | |
6214b83b PMR |
319 | Full_Typ : Entity_Id := Typ; |
320 | Root_Typ : Entity_Id := Root_Type (Typ); | |
321 | Static_DT : Boolean; | |
15529d0a PMR |
322 | |
323 | begin | |
324 | -- Handle private types | |
325 | ||
326 | if Present (Full_View (Typ)) then | |
327 | Full_Typ := Full_View (Typ); | |
328 | end if; | |
329 | ||
330 | if Present (Full_View (Root_Typ)) then | |
331 | Root_Typ := Full_View (Root_Typ); | |
332 | end if; | |
333 | ||
65e5747e PMR |
334 | Static_DT := |
335 | Building_Static_DT (Full_Typ) | |
336 | and then not Is_Interface (Full_Typ) | |
337 | and then Has_Interfaces (Full_Typ) | |
338 | and then (Full_Typ = Root_Typ | |
339 | or else not Is_Variable_Size_Record (Etype (Full_Typ))); | |
6214b83b PMR |
340 | |
341 | if not Static_DT | |
342 | and then not Is_Interface (Full_Typ) | |
343 | and then Has_Interfaces (Full_Typ) | |
344 | then | |
345 | Check_Restriction (Static_Dispatch_Tables, Typ); | |
346 | end if; | |
347 | ||
348 | return Static_DT; | |
15529d0a PMR |
349 | end Building_Static_Secondary_DT; |
350 | ||
b2e1beb3 ES |
351 | ---------------------------------- |
352 | -- Build_Static_Dispatch_Tables -- | |
353 | ---------------------------------- | |
354 | ||
355 | procedure Build_Static_Dispatch_Tables (N : Entity_Id) is | |
356 | Target_List : List_Id; | |
357 | ||
358 | procedure Build_Dispatch_Tables (List : List_Id); | |
359 | -- Build the static dispatch table of tagged types found in the list of | |
360 | -- declarations. The generated nodes are added at the end of Target_List | |
361 | ||
362 | procedure Build_Package_Dispatch_Tables (N : Node_Id); | |
363 | -- Build static dispatch tables associated with package declaration N | |
364 | ||
365 | --------------------------- | |
366 | -- Build_Dispatch_Tables -- | |
367 | --------------------------- | |
368 | ||
369 | procedure Build_Dispatch_Tables (List : List_Id) is | |
370 | D : Node_Id; | |
371 | ||
372 | begin | |
373 | D := First (List); | |
374 | while Present (D) loop | |
375 | ||
376 | -- Handle nested packages and package bodies recursively. The | |
377 | -- generated code is placed on the Target_List established for | |
378 | -- the enclosing compilation unit. | |
379 | ||
380 | if Nkind (D) = N_Package_Declaration then | |
381 | Build_Package_Dispatch_Tables (D); | |
382 | ||
383 | elsif Nkind (D) = N_Package_Body then | |
384 | Build_Dispatch_Tables (Declarations (D)); | |
385 | ||
386 | elsif Nkind (D) = N_Package_Body_Stub | |
387 | and then Present (Library_Unit (D)) | |
388 | then | |
389 | Build_Dispatch_Tables | |
390 | (Declarations (Proper_Body (Unit (Library_Unit (D))))); | |
391 | ||
6782b1ef AC |
392 | -- Handle full type declarations and derivations of library level |
393 | -- tagged types | |
b2e1beb3 | 394 | |
4a08c95c AC |
395 | elsif Nkind (D) in |
396 | N_Full_Type_Declaration | N_Derived_Type_Definition | |
b2e1beb3 ES |
397 | and then Is_Library_Level_Tagged_Type (Defining_Entity (D)) |
398 | and then Ekind (Defining_Entity (D)) /= E_Record_Subtype | |
399 | and then not Is_Private_Type (Defining_Entity (D)) | |
400 | then | |
9013065b | 401 | -- We do not generate dispatch tables for the internal types |
39f346aa ES |
402 | -- created for a type extension with unknown discriminants |
403 | -- The needed information is shared with the source type, | |
404 | -- See Expand_N_Record_Extension. | |
405 | ||
9013065b AC |
406 | if Is_Underlying_Record_View (Defining_Entity (D)) |
407 | or else | |
408 | (not Comes_From_Source (Defining_Entity (D)) | |
409 | and then | |
8737a29a | 410 | Has_Unknown_Discriminants (Etype (Defining_Entity (D))) |
9013065b | 411 | and then |
8737a29a AC |
412 | not Comes_From_Source |
413 | (First_Subtype (Defining_Entity (D)))) | |
39f346aa ES |
414 | then |
415 | null; | |
39f346aa ES |
416 | else |
417 | Insert_List_After_And_Analyze (Last (Target_List), | |
418 | Make_DT (Defining_Entity (D))); | |
419 | end if; | |
b2e1beb3 ES |
420 | |
421 | -- Handle private types of library level tagged types. We must | |
422 | -- exchange the private and full-view to ensure the correct | |
39314862 ES |
423 | -- expansion. If the full view is a synchronized type ignore |
424 | -- the type because the table will be built for the corresponding | |
425 | -- record type, that has its own declaration. | |
b2e1beb3 ES |
426 | |
427 | elsif (Nkind (D) = N_Private_Type_Declaration | |
428 | or else Nkind (D) = N_Private_Extension_Declaration) | |
429 | and then Present (Full_View (Defining_Entity (D))) | |
b2e1beb3 ES |
430 | then |
431 | declare | |
1923d2d6 | 432 | E1 : constant Entity_Id := Defining_Entity (D); |
39314862 | 433 | E2 : constant Entity_Id := Full_View (E1); |
1923d2d6 | 434 | |
b2e1beb3 | 435 | begin |
39314862 ES |
436 | if Is_Library_Level_Tagged_Type (E2) |
437 | and then Ekind (E2) /= E_Record_Subtype | |
438 | and then not Is_Concurrent_Type (E2) | |
439 | then | |
440 | Exchange_Declarations (E1); | |
441 | Insert_List_After_And_Analyze (Last (Target_List), | |
442 | Make_DT (E1)); | |
443 | Exchange_Declarations (E2); | |
444 | end if; | |
b2e1beb3 ES |
445 | end; |
446 | end if; | |
447 | ||
448 | Next (D); | |
449 | end loop; | |
450 | end Build_Dispatch_Tables; | |
451 | ||
452 | ----------------------------------- | |
453 | -- Build_Package_Dispatch_Tables -- | |
454 | ----------------------------------- | |
455 | ||
456 | procedure Build_Package_Dispatch_Tables (N : Node_Id) is | |
457 | Spec : constant Node_Id := Specification (N); | |
458 | Id : constant Entity_Id := Defining_Entity (N); | |
459 | Vis_Decls : constant List_Id := Visible_Declarations (Spec); | |
460 | Priv_Decls : constant List_Id := Private_Declarations (Spec); | |
461 | ||
462 | begin | |
463 | Push_Scope (Id); | |
464 | ||
465 | if Present (Priv_Decls) then | |
466 | Build_Dispatch_Tables (Vis_Decls); | |
467 | Build_Dispatch_Tables (Priv_Decls); | |
468 | ||
469 | elsif Present (Vis_Decls) then | |
470 | Build_Dispatch_Tables (Vis_Decls); | |
471 | end if; | |
472 | ||
473 | Pop_Scope; | |
474 | end Build_Package_Dispatch_Tables; | |
475 | ||
476 | -- Start of processing for Build_Static_Dispatch_Tables | |
477 | ||
478 | begin | |
479 | if not Expander_Active | |
1f110335 | 480 | or else not Tagged_Type_Expansion |
b2e1beb3 ES |
481 | then |
482 | return; | |
483 | end if; | |
484 | ||
485 | if Nkind (N) = N_Package_Declaration then | |
486 | declare | |
487 | Spec : constant Node_Id := Specification (N); | |
488 | Vis_Decls : constant List_Id := Visible_Declarations (Spec); | |
489 | Priv_Decls : constant List_Id := Private_Declarations (Spec); | |
490 | ||
491 | begin | |
492 | if Present (Priv_Decls) | |
493 | and then Is_Non_Empty_List (Priv_Decls) | |
494 | then | |
495 | Target_List := Priv_Decls; | |
496 | ||
497 | elsif not Present (Vis_Decls) then | |
498 | Target_List := New_List; | |
499 | Set_Private_Declarations (Spec, Target_List); | |
500 | else | |
501 | Target_List := Vis_Decls; | |
502 | end if; | |
503 | ||
504 | Build_Package_Dispatch_Tables (N); | |
505 | end; | |
506 | ||
507 | else pragma Assert (Nkind (N) = N_Package_Body); | |
508 | Target_List := Declarations (N); | |
509 | Build_Dispatch_Tables (Target_List); | |
510 | end if; | |
511 | end Build_Static_Dispatch_Tables; | |
512 | ||
bed8af19 AC |
513 | ------------------------------ |
514 | -- Convert_Tag_To_Interface -- | |
515 | ------------------------------ | |
516 | ||
517 | function Convert_Tag_To_Interface | |
518 | (Typ : Entity_Id; | |
519 | Expr : Node_Id) return Node_Id | |
520 | is | |
521 | Loc : constant Source_Ptr := Sloc (Expr); | |
522 | Anon_Type : Entity_Id; | |
523 | Result : Node_Id; | |
524 | ||
525 | begin | |
526 | pragma Assert (Is_Class_Wide_Type (Typ) | |
527 | and then Is_Interface (Typ) | |
528 | and then | |
529 | ((Nkind (Expr) = N_Selected_Component | |
3ce5ca75 | 530 | and then Is_Tag (Entity (Selector_Name (Expr)))) |
bed8af19 AC |
531 | or else |
532 | (Nkind (Expr) = N_Function_Call | |
3477e0b2 | 533 | and then Is_RTE (Entity (Name (Expr)), RE_Displace)))); |
bed8af19 AC |
534 | |
535 | Anon_Type := Create_Itype (E_Anonymous_Access_Type, Expr); | |
536 | Set_Directly_Designated_Type (Anon_Type, Typ); | |
537 | Set_Etype (Anon_Type, Anon_Type); | |
538 | Set_Can_Never_Be_Null (Anon_Type); | |
539 | ||
540 | -- Decorate the size and alignment attributes of the anonymous access | |
6782b1ef | 541 | -- type, as required by the back end. |
bed8af19 AC |
542 | |
543 | Layout_Type (Anon_Type); | |
544 | ||
545 | if Nkind (Expr) = N_Selected_Component | |
546 | and then Is_Tag (Entity (Selector_Name (Expr))) | |
547 | then | |
548 | Result := | |
549 | Make_Explicit_Dereference (Loc, | |
550 | Unchecked_Convert_To (Anon_Type, | |
551 | Make_Attribute_Reference (Loc, | |
552 | Prefix => Expr, | |
553 | Attribute_Name => Name_Address))); | |
554 | else | |
555 | Result := | |
556 | Make_Explicit_Dereference (Loc, | |
557 | Unchecked_Convert_To (Anon_Type, Expr)); | |
558 | end if; | |
559 | ||
560 | return Result; | |
561 | end Convert_Tag_To_Interface; | |
562 | ||
cefce34c JM |
563 | ------------------- |
564 | -- CPP_Num_Prims -- | |
565 | ------------------- | |
566 | ||
567 | function CPP_Num_Prims (Typ : Entity_Id) return Nat is | |
568 | CPP_Typ : Entity_Id; | |
569 | Tag_Comp : Entity_Id; | |
570 | ||
571 | begin | |
572 | if not Is_Tagged_Type (Typ) | |
573 | or else not Is_CPP_Class (Root_Type (Typ)) | |
574 | then | |
575 | return 0; | |
576 | ||
577 | else | |
578 | CPP_Typ := Enclosing_CPP_Parent (Typ); | |
579 | Tag_Comp := First_Tag_Component (CPP_Typ); | |
580 | ||
6782b1ef | 581 | -- If number of primitives already set in the tag component, use it |
cefce34c JM |
582 | |
583 | if Present (Tag_Comp) | |
584 | and then DT_Entry_Count (Tag_Comp) /= No_Uint | |
585 | then | |
586 | return UI_To_Int (DT_Entry_Count (Tag_Comp)); | |
587 | ||
588 | -- Otherwise, count the primitives of the enclosing CPP type | |
589 | ||
590 | else | |
591 | declare | |
592 | Count : Nat := 0; | |
593 | Elmt : Elmt_Id; | |
594 | ||
595 | begin | |
596 | Elmt := First_Elmt (Primitive_Operations (CPP_Typ)); | |
597 | while Present (Elmt) loop | |
598 | Count := Count + 1; | |
599 | Next_Elmt (Elmt); | |
600 | end loop; | |
601 | ||
602 | return Count; | |
603 | end; | |
604 | end if; | |
605 | end if; | |
606 | end CPP_Num_Prims; | |
607 | ||
758c442c GD |
608 | ------------------------------ |
609 | -- Default_Prim_Op_Position -- | |
610 | ------------------------------ | |
611 | ||
b0efe69e | 612 | function Default_Prim_Op_Position (E : Entity_Id) return Uint is |
758c442c | 613 | TSS_Name : TSS_Name_Type; |
758c442c GD |
614 | |
615 | begin | |
758c442c GD |
616 | Get_Name_String (Chars (E)); |
617 | TSS_Name := | |
618 | TSS_Name_Type | |
619 | (Name_Buffer (Name_Len - TSS_Name'Length + 1 .. Name_Len)); | |
620 | ||
621 | if Chars (E) = Name_uSize then | |
622 | return Uint_1; | |
623 | ||
758c442c | 624 | elsif TSS_Name = TSS_Stream_Read then |
6bed26b5 | 625 | return Uint_2; |
758c442c GD |
626 | |
627 | elsif TSS_Name = TSS_Stream_Write then | |
6bed26b5 | 628 | return Uint_3; |
758c442c GD |
629 | |
630 | elsif TSS_Name = TSS_Stream_Input then | |
6bed26b5 | 631 | return Uint_4; |
758c442c GD |
632 | |
633 | elsif TSS_Name = TSS_Stream_Output then | |
6bed26b5 | 634 | return Uint_5; |
758c442c GD |
635 | |
636 | elsif Chars (E) = Name_Op_Eq then | |
6bed26b5 | 637 | return Uint_6; |
758c442c GD |
638 | |
639 | elsif Chars (E) = Name_uAssign then | |
6bed26b5 | 640 | return Uint_7; |
758c442c GD |
641 | |
642 | elsif TSS_Name = TSS_Deep_Adjust then | |
6bed26b5 | 643 | return Uint_8; |
758c442c GD |
644 | |
645 | elsif TSS_Name = TSS_Deep_Finalize then | |
6bed26b5 | 646 | return Uint_9; |
758c442c | 647 | |
110d0820 BD |
648 | elsif TSS_Name = TSS_Put_Image then |
649 | return Uint_10; | |
650 | ||
4fbad0ba AC |
651 | -- In VM targets unconditionally allow obtaining the position associated |
652 | -- with predefined interface primitives since in these platforms any | |
653 | -- tagged type has these primitives. | |
654 | ||
655 | elsif Ada_Version >= Ada_2005 or else not Tagged_Type_Expansion then | |
f4d379b8 | 656 | if Chars (E) = Name_uDisp_Asynchronous_Select then |
110d0820 | 657 | return Uint_11; |
10b93b2e | 658 | |
f4d379b8 | 659 | elsif Chars (E) = Name_uDisp_Conditional_Select then |
110d0820 | 660 | return Uint_12; |
10b93b2e | 661 | |
f4d379b8 | 662 | elsif Chars (E) = Name_uDisp_Get_Prim_Op_Kind then |
110d0820 | 663 | return Uint_13; |
10b93b2e | 664 | |
f4d379b8 | 665 | elsif Chars (E) = Name_uDisp_Get_Task_Id then |
110d0820 | 666 | return Uint_14; |
10b93b2e | 667 | |
80b992ae | 668 | elsif Chars (E) = Name_uDisp_Requeue then |
110d0820 | 669 | return Uint_15; |
80b992ae HK |
670 | |
671 | elsif Chars (E) = Name_uDisp_Timed_Select then | |
110d0820 | 672 | return Uint_16; |
f4d379b8 | 673 | end if; |
758c442c | 674 | end if; |
f4d379b8 HK |
675 | |
676 | raise Program_Error; | |
758c442c GD |
677 | end Default_Prim_Op_Position; |
678 | ||
fe683ef6 AC |
679 | ---------------------- |
680 | -- Elab_Flag_Needed -- | |
681 | ---------------------- | |
682 | ||
683 | function Elab_Flag_Needed (Typ : Entity_Id) return Boolean is | |
684 | begin | |
685 | return Ada_Version >= Ada_2005 | |
686 | and then not Is_Interface (Typ) | |
3ec54569 PMR |
687 | and then Has_Interfaces (Typ) |
688 | and then not Building_Static_DT (Typ); | |
fe683ef6 AC |
689 | end Elab_Flag_Needed; |
690 | ||
82c80734 RD |
691 | ----------------------------- |
692 | -- Expand_Dispatching_Call -- | |
693 | ----------------------------- | |
70482933 | 694 | |
82c80734 | 695 | procedure Expand_Dispatching_Call (Call_Node : Node_Id) is |
70482933 RK |
696 | Loc : constant Source_Ptr := Sloc (Call_Node); |
697 | Call_Typ : constant Entity_Id := Etype (Call_Node); | |
698 | ||
5b7dd52d JM |
699 | Ctrl_Arg : constant Node_Id := Controlling_Argument (Call_Node); |
700 | Ctrl_Typ : constant Entity_Id := Base_Type (Etype (Ctrl_Arg)); | |
701 | Param_List : constant List_Id := Parameter_Associations (Call_Node); | |
70482933 | 702 | |
bfef8d0d | 703 | Subp : Entity_Id; |
82c80734 RD |
704 | CW_Typ : Entity_Id; |
705 | New_Call : Node_Id; | |
706 | New_Call_Name : Node_Id; | |
707 | New_Params : List_Id := No_List; | |
708 | Param : Node_Id; | |
709 | Res_Typ : Entity_Id; | |
710 | Subp_Ptr_Typ : Entity_Id; | |
711 | Subp_Typ : Entity_Id; | |
712 | Typ : Entity_Id; | |
713 | Eq_Prim_Op : Entity_Id := Empty; | |
714 | Controlling_Tag : Node_Id; | |
70482933 | 715 | |
2fd7689c | 716 | procedure Build_Class_Wide_Check (E : Entity_Id); |
ef952fd5 HK |
717 | -- If the denoted subprogram has a class-wide precondition, generate a |
718 | -- check using that precondition before the dispatching call, because | |
2fd7689c JM |
719 | -- this is the only class-wide precondition that applies to the call; |
720 | -- otherwise climb to the ancestors searching for the enclosing | |
721 | -- overridden primitive of E that has a class-wide precondition (and | |
722 | -- use it to generate the check). | |
304757d2 | 723 | |
70482933 | 724 | function New_Value (From : Node_Id) return Node_Id; |
fbf5a39b AC |
725 | -- From is the original Expression. New_Value is equivalent to a call |
726 | -- to Duplicate_Subexpr with an explicit dereference when From is an | |
82c80734 RD |
727 | -- access parameter. |
728 | ||
304757d2 AC |
729 | ---------------------------- |
730 | -- Build_Class_Wide_Check -- | |
731 | ---------------------------- | |
732 | ||
2fd7689c JM |
733 | procedure Build_Class_Wide_Check (E : Entity_Id) is |
734 | Subp : Entity_Id := E; | |
735 | ||
736 | function Has_Class_Wide_Precondition | |
737 | (Subp : Entity_Id) return Boolean; | |
738 | -- Evaluates if the dispatching subprogram Subp has a class-wide | |
739 | -- precondition. | |
740 | ||
304757d2 AC |
741 | function Replace_Formals (N : Node_Id) return Traverse_Result; |
742 | -- Replace occurrences of the formals of the subprogram by the | |
743 | -- corresponding actuals in the call, given that this check is | |
744 | -- performed outside of the body of the subprogram. | |
745 | ||
1233757a ES |
746 | -- If the dispatching call appears in the same scope as the |
747 | -- declaration of the dispatching subprogram (for example in | |
31fde973 | 748 | -- the expression of a local expression function), the spec |
1233757a ES |
749 | -- has not been analyzed yet, in which case we use the Chars |
750 | -- field to recognize intended occurrences of the formals. | |
751 | ||
2fd7689c JM |
752 | --------------------------------- |
753 | -- Has_Class_Wide_Precondition -- | |
754 | --------------------------------- | |
755 | ||
756 | function Has_Class_Wide_Precondition | |
757 | (Subp : Entity_Id) return Boolean | |
758 | is | |
759 | Prec : Node_Id := Empty; | |
760 | ||
761 | begin | |
762 | if Present (Contract (Subp)) | |
763 | and then Present (Pre_Post_Conditions (Contract (Subp))) | |
764 | then | |
765 | Prec := Pre_Post_Conditions (Contract (Subp)); | |
766 | ||
767 | while Present (Prec) loop | |
768 | exit when Pragma_Name (Prec) = Name_Precondition | |
769 | and then Class_Present (Prec); | |
770 | Prec := Next_Pragma (Prec); | |
771 | end loop; | |
772 | end if; | |
773 | ||
774 | return Present (Prec) | |
775 | and then not Is_Ignored (Prec); | |
776 | end Has_Class_Wide_Precondition; | |
777 | ||
304757d2 AC |
778 | --------------------- |
779 | -- Replace_Formals -- | |
780 | --------------------- | |
781 | ||
782 | function Replace_Formals (N : Node_Id) return Traverse_Result is | |
1233757a ES |
783 | A : Node_Id; |
784 | F : Entity_Id; | |
304757d2 | 785 | begin |
1233757a ES |
786 | if Is_Entity_Name (N) then |
787 | F := First_Formal (Subp); | |
788 | A := First_Actual (Call_Node); | |
304757d2 | 789 | |
31fde973 | 790 | if Present (Entity (N)) and then Is_Formal (Entity (N)) then |
304757d2 AC |
791 | while Present (F) loop |
792 | if F = Entity (N) then | |
2fd7689c JM |
793 | if not Is_Controlling_Actual (N) then |
794 | Rewrite (N, New_Copy_Tree (A)); | |
795 | ||
796 | -- If the formal is class-wide, and thus not a | |
797 | -- controlling argument, preserve its type because | |
798 | -- it may appear in a nested call with a class-wide | |
799 | -- parameter. | |
800 | ||
801 | if Is_Class_Wide_Type (Etype (F)) then | |
802 | Set_Etype (N, Etype (F)); | |
803 | ||
804 | -- Conversely, if this is a controlling argument | |
805 | -- (in a dispatching call in the condition) that | |
806 | -- is a dereference, the source is an access-to- | |
807 | -- -class-wide type, so preserve the dispatching | |
808 | -- nature of the call in the rewritten condition. | |
809 | ||
810 | elsif Nkind (Parent (N)) = N_Explicit_Dereference | |
811 | and then Is_Controlling_Actual (Parent (N)) | |
812 | then | |
813 | Set_Controlling_Argument (Parent (Parent (N)), | |
814 | Parent (N)); | |
815 | end if; | |
816 | ||
817 | -- Ensure that the type of the controlling actual | |
818 | -- matches the type of the controlling formal of the | |
819 | -- parent primitive Subp defining the class-wide | |
820 | -- precondition. | |
821 | ||
822 | elsif Is_Class_Wide_Type (Etype (A)) then | |
823 | Rewrite (N, | |
824 | Convert_To | |
825 | (Class_Wide_Type (Etype (F)), | |
826 | New_Copy_Tree (A))); | |
827 | ||
828 | else | |
829 | Rewrite (N, | |
830 | Convert_To | |
831 | (Etype (F), | |
832 | New_Copy_Tree (A))); | |
83b77c5c AC |
833 | end if; |
834 | ||
304757d2 AC |
835 | exit; |
836 | end if; | |
ef952fd5 | 837 | |
304757d2 AC |
838 | Next_Formal (F); |
839 | Next_Actual (A); | |
840 | end loop; | |
1233757a | 841 | |
31fde973 GD |
842 | -- If the node is not analyzed, recognize occurrences of a |
843 | -- formal by name, as would be done when resolving the aspect | |
844 | -- expression in the context of the subprogram. | |
1233757a ES |
845 | |
846 | elsif not Analyzed (N) | |
847 | and then Nkind (N) = N_Identifier | |
848 | and then No (Entity (N)) | |
849 | then | |
850 | while Present (F) loop | |
851 | if Chars (N) = Chars (F) then | |
852 | Rewrite (N, New_Copy_Tree (A)); | |
853 | return Skip; | |
854 | end if; | |
855 | ||
856 | Next_Formal (F); | |
857 | Next_Actual (A); | |
858 | end loop; | |
859 | end if; | |
304757d2 AC |
860 | end if; |
861 | ||
862 | return OK; | |
863 | end Replace_Formals; | |
864 | ||
865 | procedure Update is new Traverse_Proc (Replace_Formals); | |
ef952fd5 HK |
866 | |
867 | -- Local variables | |
868 | ||
869 | Str_Loc : constant String := Build_Location_String (Loc); | |
870 | ||
871 | Cond : Node_Id; | |
872 | Msg : Node_Id; | |
873 | Prec : Node_Id; | |
874 | ||
875 | -- Start of processing for Build_Class_Wide_Check | |
876 | ||
304757d2 | 877 | begin |
2fd7689c JM |
878 | -- Climb searching for the enclosing class-wide precondition |
879 | ||
880 | while not Has_Class_Wide_Precondition (Subp) | |
881 | and then Present (Overridden_Operation (Subp)) | |
882 | loop | |
883 | Subp := Overridden_Operation (Subp); | |
884 | end loop; | |
304757d2 AC |
885 | |
886 | -- Locate class-wide precondition, if any | |
887 | ||
888 | if Present (Contract (Subp)) | |
889 | and then Present (Pre_Post_Conditions (Contract (Subp))) | |
890 | then | |
891 | Prec := Pre_Post_Conditions (Contract (Subp)); | |
892 | ||
893 | while Present (Prec) loop | |
894 | exit when Pragma_Name (Prec) = Name_Precondition | |
895 | and then Class_Present (Prec); | |
896 | Prec := Next_Pragma (Prec); | |
897 | end loop; | |
898 | ||
db38c41b | 899 | if No (Prec) or else Is_Ignored (Prec) then |
304757d2 AC |
900 | return; |
901 | end if; | |
902 | ||
903 | -- The expression for the precondition is analyzed within the | |
ef952fd5 HK |
904 | -- generated pragma. The message text is the last parameter of |
905 | -- the generated pragma, indicating source of precondition. | |
304757d2 | 906 | |
ef952fd5 HK |
907 | Cond := |
908 | New_Copy_Tree | |
909 | (Expression (First (Pragma_Argument_Associations (Prec)))); | |
304757d2 AC |
910 | Update (Cond); |
911 | ||
912 | -- Build message indicating the failed precondition and the | |
913 | -- dispatching call that caused it. | |
914 | ||
915 | Msg := Expression (Last (Pragma_Argument_Associations (Prec))); | |
916 | Name_Len := 0; | |
917 | Append (Global_Name_Buffer, Strval (Msg)); | |
918 | Append (Global_Name_Buffer, " in dispatching call at "); | |
919 | Append (Global_Name_Buffer, Str_Loc); | |
920 | Msg := Make_String_Literal (Loc, Name_Buffer (1 .. Name_Len)); | |
921 | ||
922 | Insert_Action (Call_Node, | |
ef952fd5 HK |
923 | Make_If_Statement (Loc, |
924 | Condition => Make_Op_Not (Loc, Cond), | |
925 | Then_Statements => New_List ( | |
926 | Make_Procedure_Call_Statement (Loc, | |
927 | Name => | |
928 | New_Occurrence_Of (RTE (RE_Raise_Assert_Failure), Loc), | |
929 | Parameter_Associations => New_List (Msg))))); | |
304757d2 AC |
930 | end if; |
931 | end Build_Class_Wide_Check; | |
932 | ||
fbf5a39b AC |
933 | --------------- |
934 | -- New_Value -- | |
935 | --------------- | |
936 | ||
70482933 RK |
937 | function New_Value (From : Node_Id) return Node_Id is |
938 | Res : constant Node_Id := Duplicate_Subexpr (From); | |
70482933 RK |
939 | begin |
940 | if Is_Access_Type (Etype (From)) then | |
bfef8d0d JM |
941 | return |
942 | Make_Explicit_Dereference (Sloc (From), | |
943 | Prefix => Res); | |
70482933 RK |
944 | else |
945 | return Res; | |
946 | end if; | |
947 | end New_Value; | |
948 | ||
327503f1 JM |
949 | -- Local variables |
950 | ||
7665e4bd | 951 | New_Node : Node_Id; |
a6d25cad | 952 | SCIL_Node : Node_Id := Empty; |
7665e4bd | 953 | SCIL_Related_Node : Node_Id := Call_Node; |
327503f1 | 954 | |
82c80734 | 955 | -- Start of processing for Expand_Dispatching_Call |
70482933 RK |
956 | |
957 | begin | |
d0dd5209 JM |
958 | if No_Run_Time_Mode then |
959 | Error_Msg_CRT ("tagged types", Call_Node); | |
960 | return; | |
961 | end if; | |
962 | ||
6782b1ef AC |
963 | -- Expand_Dispatching_Call is called directly from the semantics, so we |
964 | -- only proceed if the expander is active. | |
dee4682a | 965 | |
4460a9bc | 966 | if not Expander_Active |
c199ccf7 AC |
967 | |
968 | -- And there is no need to expand the call if we are compiling under | |
969 | -- restriction No_Dispatching_Calls; the semantic analyzer has | |
970 | -- previously notified the violation of this restriction. | |
971 | ||
dee4682a | 972 | or else Restriction_Active (No_Dispatching_Calls) |
7af1cf83 AC |
973 | |
974 | -- No action needed if the dispatching call has been already expanded | |
975 | ||
976 | or else Is_Expanded_Dispatching_Call (Name (Call_Node)) | |
dee4682a JM |
977 | then |
978 | return; | |
979 | end if; | |
b0efe69e | 980 | |
bfef8d0d JM |
981 | -- Set subprogram. If this is an inherited operation that was |
982 | -- overridden, the body that is being called is its alias. | |
983 | ||
984 | Subp := Entity (Name (Call_Node)); | |
70482933 RK |
985 | |
986 | if Present (Alias (Subp)) | |
987 | and then Is_Inherited_Operation (Subp) | |
988 | and then No (DTC_Entity (Subp)) | |
989 | then | |
990 | Subp := Alias (Subp); | |
991 | end if; | |
992 | ||
2fd7689c | 993 | Build_Class_Wide_Check (Subp); |
304757d2 | 994 | |
82c80734 | 995 | -- Definition of the class-wide type and the tagged type |
70482933 | 996 | |
82c80734 RD |
997 | -- If the controlling argument is itself a tag rather than a tagged |
998 | -- object, then use the class-wide type associated with the subprogram's | |
999 | -- controlling type. This case can occur when a call to an inherited | |
1000 | -- primitive has an actual that originated from a default parameter | |
1001 | -- given by a tag-indeterminate call and when there is no other | |
1002 | -- controlling argument providing the tag (AI-239 requires dispatching). | |
1003 | -- This capability of dispatching directly by tag is also needed by the | |
1004 | -- implementation of AI-260 (for the generic dispatching constructors). | |
1005 | ||
3477e0b2 PT |
1006 | if Is_RTE (Ctrl_Typ, RE_Tag) |
1007 | or else Is_RTE (Ctrl_Typ, RE_Interface_Tag) | |
758c442c | 1008 | then |
bfef8d0d | 1009 | CW_Typ := Class_Wide_Type (Find_Dispatching_Type (Subp)); |
82c80734 | 1010 | |
d0dd5209 JM |
1011 | -- Class_Wide_Type is applied to the expressions used to initialize |
1012 | -- CW_Typ, to ensure that CW_Typ always denotes a class-wide type, since | |
1013 | -- there are cases where the controlling type is resolved to a specific | |
1014 | -- type (such as for designated types of arguments such as CW'Access). | |
1015 | ||
5b7dd52d JM |
1016 | elsif Is_Access_Type (Ctrl_Typ) then |
1017 | CW_Typ := Class_Wide_Type (Designated_Type (Ctrl_Typ)); | |
82c80734 | 1018 | |
70482933 | 1019 | else |
5b7dd52d | 1020 | CW_Typ := Class_Wide_Type (Ctrl_Typ); |
70482933 RK |
1021 | end if; |
1022 | ||
98ee6f8d | 1023 | Typ := Find_Specific_Type (CW_Typ); |
10b93b2e | 1024 | |
70482933 RK |
1025 | if not Is_Limited_Type (Typ) then |
1026 | Eq_Prim_Op := Find_Prim_Op (Typ, Name_Op_Eq); | |
1027 | end if; | |
1028 | ||
dee4682a JM |
1029 | -- Dispatching call to C++ primitive. Create a new parameter list |
1030 | -- with no tag checks. | |
70482933 | 1031 | |
5a1ccfb1 AC |
1032 | New_Params := New_List; |
1033 | ||
dee4682a | 1034 | if Is_CPP_Class (Typ) then |
70482933 RK |
1035 | Param := First_Actual (Call_Node); |
1036 | while Present (Param) loop | |
758c442c | 1037 | Append_To (New_Params, Relocate_Node (Param)); |
70482933 RK |
1038 | Next_Actual (Param); |
1039 | end loop; | |
1040 | ||
dee4682a JM |
1041 | -- Dispatching call to Ada primitive |
1042 | ||
70482933 | 1043 | elsif Present (Param_List) then |
5a1ccfb1 | 1044 | Apply_Tag_Checks (Call_Node); |
70482933 | 1045 | |
70482933 RK |
1046 | Param := First_Actual (Call_Node); |
1047 | while Present (Param) loop | |
1048 | ||
e6d5d940 GD |
1049 | -- Cases in which we may have generated run-time checks. Note that |
1050 | -- we strip any qualification from Param before comparing with the | |
1051 | -- already-stripped controlling argument. | |
1052 | ||
1053 | if Unqualify (Param) = Ctrl_Arg or else Subp = Eq_Prim_Op then | |
fbf5a39b AC |
1054 | Append_To (New_Params, |
1055 | Duplicate_Subexpr_Move_Checks (Param)); | |
70482933 | 1056 | |
75a64833 AC |
1057 | elsif Nkind (Parent (Param)) /= N_Parameter_Association |
1058 | or else not Is_Accessibility_Actual (Parent (Param)) | |
1059 | then | |
70482933 RK |
1060 | Append_To (New_Params, Relocate_Node (Param)); |
1061 | end if; | |
1062 | ||
1063 | Next_Actual (Param); | |
1064 | end loop; | |
1065 | end if; | |
1066 | ||
1067 | -- Generate the appropriate subprogram pointer type | |
1068 | ||
b0efe69e | 1069 | if Etype (Subp) = Typ then |
70482933 RK |
1070 | Res_Typ := CW_Typ; |
1071 | else | |
82c80734 | 1072 | Res_Typ := Etype (Subp); |
70482933 RK |
1073 | end if; |
1074 | ||
4da17013 | 1075 | Subp_Typ := Create_Itype (E_Subprogram_Type, Call_Node); |
70482933 RK |
1076 | Subp_Ptr_Typ := Create_Itype (E_Access_Subprogram_Type, Call_Node); |
1077 | Set_Etype (Subp_Typ, Res_Typ); | |
70482933 | 1078 | Set_Returns_By_Ref (Subp_Typ, Returns_By_Ref (Subp)); |
28dd0055 EB |
1079 | Set_Convention (Subp_Typ, Convention (Subp)); |
1080 | ||
1081 | -- Notify gigi that the designated type is a dispatching primitive | |
1082 | ||
1083 | Set_Is_Dispatch_Table_Entity (Subp_Typ); | |
70482933 RK |
1084 | |
1085 | -- Create a new list of parameters which is a copy of the old formal | |
1086 | -- list including the creation of a new set of matching entities. | |
1087 | ||
1088 | declare | |
765005dd JM |
1089 | Old_Formal : Entity_Id := First_Formal (Subp); |
1090 | New_Formal : Entity_Id; | |
1091 | Last_Formal : Entity_Id := Empty; | |
70482933 RK |
1092 | |
1093 | begin | |
1094 | if Present (Old_Formal) then | |
1095 | New_Formal := New_Copy (Old_Formal); | |
1096 | Set_First_Entity (Subp_Typ, New_Formal); | |
1097 | Param := First_Actual (Call_Node); | |
1098 | ||
1099 | loop | |
1100 | Set_Scope (New_Formal, Subp_Typ); | |
1101 | ||
1102 | -- Change all the controlling argument types to be class-wide | |
82c80734 | 1103 | -- to avoid a recursion in dispatching. |
70482933 | 1104 | |
82c80734 | 1105 | if Is_Controlling_Formal (New_Formal) then |
70482933 RK |
1106 | Set_Etype (New_Formal, Etype (Param)); |
1107 | end if; | |
1108 | ||
f2cbd970 JM |
1109 | -- If the type of the formal is an itype, there was code here |
1110 | -- introduced in 1998 in revision 1.46, to create a new itype | |
1111 | -- by copy. This seems useless, and in fact leads to semantic | |
1112 | -- errors when the itype is the completion of a type derived | |
1113 | -- from a private type. | |
70482933 | 1114 | |
765005dd | 1115 | Last_Formal := New_Formal; |
70482933 RK |
1116 | Next_Formal (Old_Formal); |
1117 | exit when No (Old_Formal); | |
1118 | ||
3f6d1daa JS |
1119 | Link_Entities (New_Formal, New_Copy (Old_Formal)); |
1120 | Next_Entity (New_Formal); | |
1121 | Next_Actual (Param); | |
70482933 | 1122 | end loop; |
bfef8d0d | 1123 | |
3f6d1daa | 1124 | Unlink_Next_Entity (New_Formal); |
765005dd | 1125 | Set_Last_Entity (Subp_Typ, Last_Formal); |
d0dd5209 | 1126 | end if; |
70482933 | 1127 | |
d0dd5209 | 1128 | -- Now that the explicit formals have been duplicated, any extra |
765005dd JM |
1129 | -- formals needed by the subprogram must be duplicated; we know |
1130 | -- that extra formals are available because they were added when | |
1131 | -- the tagged type was frozen (see Expand_Freeze_Record_Type). | |
70482933 | 1132 | |
765005dd JM |
1133 | pragma Assert (Is_Frozen (Typ)); |
1134 | ||
1135 | -- Warning: The addition of the extra formals cannot be performed | |
1136 | -- here invoking Create_Extra_Formals since we must ensure that all | |
1137 | -- the extra formals of the pointer type and the target subprogram | |
1138 | -- match (and for functions that return a tagged type the profile of | |
1139 | -- the built subprogram type always returns a class-wide type, which | |
1140 | -- may affect the addition of some extra formals). | |
1141 | ||
1142 | if Present (Last_Formal) | |
1143 | and then Present (Extra_Formal (Last_Formal)) | |
1144 | then | |
1145 | Old_Formal := Extra_Formal (Last_Formal); | |
1146 | New_Formal := New_Copy (Old_Formal); | |
b93d80bc | 1147 | Set_Scope (New_Formal, Subp_Typ); |
d0dd5209 | 1148 | |
765005dd JM |
1149 | Set_Extra_Formal (Last_Formal, New_Formal); |
1150 | Set_Extra_Formals (Subp_Typ, New_Formal); | |
1151 | ||
01264f72 JM |
1152 | if Ekind (Subp) = E_Function |
1153 | and then Present (Extra_Accessibility_Of_Result (Subp)) | |
1154 | and then Extra_Accessibility_Of_Result (Subp) = Old_Formal | |
1155 | then | |
1156 | Set_Extra_Accessibility_Of_Result (Subp_Typ, New_Formal); | |
1157 | end if; | |
1158 | ||
765005dd JM |
1159 | Old_Formal := Extra_Formal (Old_Formal); |
1160 | while Present (Old_Formal) loop | |
1161 | Set_Extra_Formal (New_Formal, New_Copy (Old_Formal)); | |
1162 | New_Formal := Extra_Formal (New_Formal); | |
1163 | Set_Scope (New_Formal, Subp_Typ); | |
1164 | ||
01264f72 JM |
1165 | if Ekind (Subp) = E_Function |
1166 | and then Present (Extra_Accessibility_Of_Result (Subp)) | |
1167 | and then Extra_Accessibility_Of_Result (Subp) = Old_Formal | |
1168 | then | |
1169 | Set_Extra_Accessibility_Of_Result (Subp_Typ, New_Formal); | |
1170 | end if; | |
1171 | ||
765005dd JM |
1172 | Old_Formal := Extra_Formal (Old_Formal); |
1173 | end loop; | |
1174 | end if; | |
70482933 RK |
1175 | end; |
1176 | ||
4da17013 AC |
1177 | -- Complete description of pointer type, including size information, as |
1178 | -- must be done with itypes to prevent order-of-elaboration anomalies | |
1179 | -- in gigi. | |
1180 | ||
70482933 RK |
1181 | Set_Etype (Subp_Ptr_Typ, Subp_Ptr_Typ); |
1182 | Set_Directly_Designated_Type (Subp_Ptr_Typ, Subp_Typ); | |
1923d2d6 | 1183 | Set_Convention (Subp_Ptr_Typ, Convention (Subp_Typ)); |
4da17013 | 1184 | Layout_Type (Subp_Ptr_Typ); |
70482933 | 1185 | |
b0efe69e JM |
1186 | -- If the controlling argument is a value of type Ada.Tag or an abstract |
1187 | -- interface class-wide type then use it directly. Otherwise, the tag | |
1188 | -- must be extracted from the controlling object. | |
82c80734 | 1189 | |
3477e0b2 PT |
1190 | if Is_RTE (Ctrl_Typ, RE_Tag) |
1191 | or else Is_RTE (Ctrl_Typ, RE_Interface_Tag) | |
b0efe69e JM |
1192 | then |
1193 | Controlling_Tag := Duplicate_Subexpr (Ctrl_Arg); | |
1194 | ||
dee4682a JM |
1195 | -- Extract the tag from an unchecked type conversion. Done to avoid |
1196 | -- the expansion of additional code just to obtain the value of such | |
1197 | -- tag because the current management of interface type conversions | |
1198 | -- generates in some cases this unchecked type conversion with the | |
1199 | -- tag of the object (see Expand_Interface_Conversion). | |
1200 | ||
1201 | elsif Nkind (Ctrl_Arg) = N_Unchecked_Type_Conversion | |
1202 | and then | |
3477e0b2 | 1203 | (Is_RTE (Etype (Expression (Ctrl_Arg)), RE_Tag) |
dee4682a | 1204 | or else |
3477e0b2 | 1205 | Is_RTE (Etype (Expression (Ctrl_Arg)), RE_Interface_Tag)) |
dee4682a JM |
1206 | then |
1207 | Controlling_Tag := Duplicate_Subexpr (Expression (Ctrl_Arg)); | |
1208 | ||
b0efe69e JM |
1209 | -- Ada 2005 (AI-251): Abstract interface class-wide type |
1210 | ||
5b7dd52d JM |
1211 | elsif Is_Interface (Ctrl_Typ) |
1212 | and then Is_Class_Wide_Type (Ctrl_Typ) | |
758c442c | 1213 | then |
82c80734 RD |
1214 | Controlling_Tag := Duplicate_Subexpr (Ctrl_Arg); |
1215 | ||
f715a5bd EB |
1216 | elsif Is_Access_Type (Ctrl_Typ) then |
1217 | Controlling_Tag := | |
1218 | Make_Selected_Component (Loc, | |
1219 | Prefix => | |
1220 | Make_Explicit_Dereference (Loc, | |
1221 | Duplicate_Subexpr_Move_Checks (Ctrl_Arg)), | |
1222 | Selector_Name => New_Occurrence_Of (DTC_Entity (Subp), Loc)); | |
1223 | ||
82c80734 RD |
1224 | else |
1225 | Controlling_Tag := | |
1226 | Make_Selected_Component (Loc, | |
a73734f5 | 1227 | Prefix => Duplicate_Subexpr_Move_Checks (Ctrl_Arg), |
e4494292 | 1228 | Selector_Name => New_Occurrence_Of (DTC_Entity (Subp), Loc)); |
82c80734 RD |
1229 | end if; |
1230 | ||
a73734f5 | 1231 | -- Handle dispatching calls to predefined primitives |
70482933 | 1232 | |
bfef8d0d JM |
1233 | if Is_Predefined_Dispatching_Operation (Subp) |
1234 | or else Is_Predefined_Dispatching_Alias (Subp) | |
1235 | then | |
d06b3b1d JM |
1236 | Build_Get_Predefined_Prim_Op_Address (Loc, |
1237 | Tag_Node => Controlling_Tag, | |
1238 | Position => DT_Position (Subp), | |
1239 | New_Node => New_Node); | |
70482933 | 1240 | |
dee4682a | 1241 | -- Handle dispatching calls to user-defined primitives |
b0efe69e JM |
1242 | |
1243 | else | |
d06b3b1d | 1244 | Build_Get_Prim_Op_Address (Loc, |
38171f43 | 1245 | Typ => Underlying_Type (Find_Dispatching_Type (Subp)), |
d06b3b1d JM |
1246 | Tag_Node => Controlling_Tag, |
1247 | Position => DT_Position (Subp), | |
1248 | New_Node => New_Node); | |
b0efe69e | 1249 | end if; |
70482933 | 1250 | |
d06b3b1d JM |
1251 | New_Call_Name := |
1252 | Unchecked_Convert_To (Subp_Ptr_Typ, New_Node); | |
1253 | ||
7665e4bd AC |
1254 | -- Generate the SCIL node for this dispatching call. Done now because |
1255 | -- attribute SCIL_Controlling_Tag must be set after the new call name | |
1256 | -- is built to reference the nodes that will see the SCIL backend | |
1257 | -- (because Build_Get_Prim_Op_Address generates an unchecked type | |
1258 | -- conversion which relocates the controlling tag node). | |
70482933 | 1259 | |
d06b3b1d | 1260 | if Generate_SCIL then |
7665e4bd AC |
1261 | SCIL_Node := Make_SCIL_Dispatching_Call (Sloc (Call_Node)); |
1262 | Set_SCIL_Entity (SCIL_Node, Typ); | |
1263 | Set_SCIL_Target_Prim (SCIL_Node, Subp); | |
d06b3b1d JM |
1264 | |
1265 | -- Common case: the controlling tag is the tag of an object | |
1266 | -- (for example, obj.tag) | |
1267 | ||
1268 | if Nkind (Controlling_Tag) = N_Selected_Component then | |
1269 | Set_SCIL_Controlling_Tag (SCIL_Node, Controlling_Tag); | |
1270 | ||
1271 | -- Handle renaming of selected component | |
1272 | ||
1273 | elsif Nkind (Controlling_Tag) = N_Identifier | |
a73734f5 AC |
1274 | and then Nkind (Parent (Entity (Controlling_Tag))) = |
1275 | N_Object_Renaming_Declaration | |
1276 | and then Nkind (Name (Parent (Entity (Controlling_Tag)))) = | |
1277 | N_Selected_Component | |
d06b3b1d JM |
1278 | then |
1279 | Set_SCIL_Controlling_Tag (SCIL_Node, | |
1280 | Name (Parent (Entity (Controlling_Tag)))); | |
1281 | ||
1282 | -- If the controlling tag is an identifier, the SCIL node references | |
1283 | -- the corresponding object or parameter declaration | |
1284 | ||
1285 | elsif Nkind (Controlling_Tag) = N_Identifier | |
4a08c95c AC |
1286 | and then Nkind (Parent (Entity (Controlling_Tag))) in |
1287 | N_Object_Declaration | N_Parameter_Specification | |
d06b3b1d JM |
1288 | then |
1289 | Set_SCIL_Controlling_Tag (SCIL_Node, | |
1290 | Parent (Entity (Controlling_Tag))); | |
1291 | ||
1292 | -- If the controlling tag is a dereference, the SCIL node references | |
1293 | -- the corresponding object or parameter declaration | |
1294 | ||
1295 | elsif Nkind (Controlling_Tag) = N_Explicit_Dereference | |
1296 | and then Nkind (Prefix (Controlling_Tag)) = N_Identifier | |
4a08c95c AC |
1297 | and then Nkind (Parent (Entity (Prefix (Controlling_Tag)))) in |
1298 | N_Object_Declaration | N_Parameter_Specification | |
d06b3b1d JM |
1299 | then |
1300 | Set_SCIL_Controlling_Tag (SCIL_Node, | |
1301 | Parent (Entity (Prefix (Controlling_Tag)))); | |
1302 | ||
1303 | -- For a direct reference of the tag of the type the SCIL node | |
308e6f3a | 1304 | -- references the internal object declaration containing the tag |
d06b3b1d JM |
1305 | -- of the type. |
1306 | ||
1307 | elsif Nkind (Controlling_Tag) = N_Attribute_Reference | |
1308 | and then Attribute_Name (Controlling_Tag) = Name_Tag | |
1309 | then | |
1310 | Set_SCIL_Controlling_Tag (SCIL_Node, | |
1311 | Parent | |
a73734f5 AC |
1312 | (Node |
1313 | (First_Elmt | |
1314 | (Access_Disp_Table (Entity (Prefix (Controlling_Tag))))))); | |
d06b3b1d JM |
1315 | |
1316 | -- Interfaces are not supported. For now we leave the SCIL node | |
1317 | -- decorated with the Controlling_Tag. More work needed here??? | |
1318 | ||
1319 | elsif Is_Interface (Etype (Controlling_Tag)) then | |
1320 | Set_SCIL_Controlling_Tag (SCIL_Node, Controlling_Tag); | |
1321 | ||
1322 | else | |
1323 | pragma Assert (False); | |
1324 | null; | |
1325 | end if; | |
1326 | end if; | |
1327 | ||
1328 | if Nkind (Call_Node) = N_Function_Call then | |
d0dd5209 JM |
1329 | New_Call := |
1330 | Make_Function_Call (Loc, | |
a73734f5 | 1331 | Name => New_Call_Name, |
d0dd5209 | 1332 | Parameter_Associations => New_Params); |
70482933 | 1333 | |
d0dd5209 JM |
1334 | -- If this is a dispatching "=", we must first compare the tags so |
1335 | -- we generate: x.tag = y.tag and then x = y | |
70482933 | 1336 | |
d0dd5209 JM |
1337 | if Subp = Eq_Prim_Op then |
1338 | Param := First_Actual (Call_Node); | |
758c442c | 1339 | New_Call := |
d0dd5209 JM |
1340 | Make_And_Then (Loc, |
1341 | Left_Opnd => | |
1342 | Make_Op_Eq (Loc, | |
1343 | Left_Opnd => | |
1344 | Make_Selected_Component (Loc, | |
a73734f5 | 1345 | Prefix => New_Value (Param), |
d0dd5209 | 1346 | Selector_Name => |
e4494292 | 1347 | New_Occurrence_Of (First_Tag_Component (Typ), |
d0dd5209 | 1348 | Loc)), |
70482933 | 1349 | |
d0dd5209 JM |
1350 | Right_Opnd => |
1351 | Make_Selected_Component (Loc, | |
a73734f5 | 1352 | Prefix => |
d0dd5209 JM |
1353 | Unchecked_Convert_To (Typ, |
1354 | New_Value (Next_Actual (Param))), | |
1355 | Selector_Name => | |
e4494292 | 1356 | New_Occurrence_Of |
a73734f5 | 1357 | (First_Tag_Component (Typ), Loc))), |
d0dd5209 | 1358 | Right_Opnd => New_Call); |
7665e4bd AC |
1359 | |
1360 | SCIL_Related_Node := Right_Opnd (New_Call); | |
70482933 RK |
1361 | end if; |
1362 | ||
1363 | else | |
1364 | New_Call := | |
1365 | Make_Procedure_Call_Statement (Loc, | |
a73734f5 | 1366 | Name => New_Call_Name, |
70482933 RK |
1367 | Parameter_Associations => New_Params); |
1368 | end if; | |
1369 | ||
9c41193c JM |
1370 | -- Register the dispatching call in the call graph nodes table |
1371 | ||
1372 | Register_CG_Node (Call_Node); | |
1373 | ||
70482933 | 1374 | Rewrite (Call_Node, New_Call); |
d0dd5209 | 1375 | |
7665e4bd AC |
1376 | -- Associate the SCIL node of this dispatching call |
1377 | ||
1378 | if Generate_SCIL then | |
1379 | Set_SCIL_Node (SCIL_Related_Node, SCIL_Node); | |
1380 | end if; | |
1381 | ||
6782b1ef AC |
1382 | -- Suppress all checks during the analysis of the expanded code to avoid |
1383 | -- the generation of spurious warnings under ZFP run-time. | |
d0dd5209 JM |
1384 | |
1385 | Analyze_And_Resolve (Call_Node, Call_Typ, Suppress => All_Checks); | |
82c80734 | 1386 | end Expand_Dispatching_Call; |
70482933 | 1387 | |
758c442c GD |
1388 | --------------------------------- |
1389 | -- Expand_Interface_Conversion -- | |
1390 | --------------------------------- | |
1391 | ||
f6f4d8d4 JM |
1392 | procedure Expand_Interface_Conversion (N : Node_Id) is |
1393 | function Underlying_Record_Type (Typ : Entity_Id) return Entity_Id; | |
72a26637 | 1394 | -- Return the underlying record type of Typ |
758c442c | 1395 | |
f6f4d8d4 JM |
1396 | ---------------------------- |
1397 | -- Underlying_Record_Type -- | |
1398 | ---------------------------- | |
758c442c | 1399 | |
f6f4d8d4 JM |
1400 | function Underlying_Record_Type (Typ : Entity_Id) return Entity_Id is |
1401 | E : Entity_Id := Typ; | |
758c442c | 1402 | |
f6f4d8d4 | 1403 | begin |
4ac62786 | 1404 | -- Handle access types |
758c442c | 1405 | |
f6f4d8d4 | 1406 | if Is_Access_Type (E) then |
4ac62786 | 1407 | E := Directly_Designated_Type (E); |
f6f4d8d4 | 1408 | end if; |
758c442c | 1409 | |
f6f4d8d4 JM |
1410 | -- Handle class-wide types. This conversion can appear explicitly in |
1411 | -- the source code. Example: I'Class (Obj) | |
758c442c | 1412 | |
f6f4d8d4 JM |
1413 | if Is_Class_Wide_Type (E) then |
1414 | E := Root_Type (E); | |
1415 | end if; | |
10b93b2e | 1416 | |
f6f4d8d4 JM |
1417 | -- If the target type is a tagged synchronized type, the dispatch |
1418 | -- table info is in the corresponding record type. | |
0f300ef5 | 1419 | |
f6f4d8d4 JM |
1420 | if Is_Concurrent_Type (E) then |
1421 | E := Corresponding_Record_Type (E); | |
1422 | end if; | |
0f300ef5 | 1423 | |
f6f4d8d4 JM |
1424 | -- Handle private types |
1425 | ||
1426 | E := Underlying_Type (E); | |
38171f43 | 1427 | |
f6f4d8d4 | 1428 | -- Handle subtypes |
38171f43 | 1429 | |
f6f4d8d4 JM |
1430 | return Base_Type (E); |
1431 | end Underlying_Record_Type; | |
1432 | ||
1433 | -- Local variables | |
1434 | ||
1435 | Loc : constant Source_Ptr := Sloc (N); | |
1436 | Etyp : constant Entity_Id := Etype (N); | |
1437 | Operand : constant Node_Id := Expression (N); | |
1438 | Operand_Typ : Entity_Id := Etype (Operand); | |
1439 | Func : Node_Id; | |
1440 | Iface_Typ : constant Entity_Id := Underlying_Record_Type (Etype (N)); | |
1441 | Iface_Tag : Entity_Id; | |
1442 | Is_Static : Boolean; | |
1443 | ||
1444 | -- Start of processing for Expand_Interface_Conversion | |
1445 | ||
1446 | begin | |
ea08fcdc AC |
1447 | -- Freeze the entity associated with the target interface to have |
1448 | -- available the attribute Access_Disp_Table. | |
1449 | ||
1450 | Freeze_Before (N, Iface_Typ); | |
1451 | ||
f6f4d8d4 JM |
1452 | -- Ada 2005 (AI-345): Handle synchronized interface type derivations |
1453 | ||
1454 | if Is_Concurrent_Type (Operand_Typ) then | |
1455 | Operand_Typ := Base_Type (Corresponding_Record_Type (Operand_Typ)); | |
1456 | end if; | |
1457 | ||
1a779058 AC |
1458 | -- No displacement of the pointer to the object needed when the type of |
1459 | -- the operand is not an interface type and the interface is one of | |
1460 | -- its parent types (since they share the primary dispatch table). | |
1461 | ||
1462 | declare | |
1463 | Opnd : Entity_Id := Operand_Typ; | |
1464 | ||
1465 | begin | |
1466 | if Is_Access_Type (Opnd) then | |
1467 | Opnd := Designated_Type (Opnd); | |
1468 | end if; | |
1469 | ||
2d9c4206 JM |
1470 | Opnd := Underlying_Record_Type (Opnd); |
1471 | ||
1a779058 AC |
1472 | if not Is_Interface (Opnd) |
1473 | and then Is_Ancestor (Iface_Typ, Opnd, Use_Full_View => True) | |
1474 | then | |
1475 | return; | |
1476 | end if; | |
2d9c4206 JM |
1477 | |
1478 | -- When the type of the operand and the target interface type match, | |
1479 | -- it is generally safe to skip generating code to displace the | |
1480 | -- pointer to the object to reference the secondary dispatch table | |
1481 | -- associated with the target interface type. The exception to this | |
1482 | -- general rule is when the underlying object of the type conversion | |
1483 | -- is an object built by means of a dispatching constructor (since in | |
1484 | -- such case the expansion of the constructor call is a direct call | |
1485 | -- to an object primitive, i.e. without thunks, and the expansion of | |
1486 | -- the constructor call adds an explicit conversion to the target | |
1487 | -- interface type to force the displacement of the pointer to the | |
1488 | -- object to reference the corresponding secondary dispatch table | |
1489 | -- (cf. Make_DT and Expand_Dispatching_Constructor_Call)). | |
1490 | ||
1491 | -- At this stage we cannot identify whether the underlying object is | |
1492 | -- a BIP object and hence we cannot skip generating the code to try | |
1493 | -- displacing the pointer to the object. However, under configurable | |
1494 | -- runtime it is safe to skip generating code to displace the pointer | |
1495 | -- to the object, because generic dispatching constructors are not | |
1496 | -- supported. | |
1497 | ||
c7862167 | 1498 | if Opnd = Iface_Typ and then not RTE_Available (RE_Displace) then |
2d9c4206 JM |
1499 | return; |
1500 | end if; | |
1a779058 AC |
1501 | end; |
1502 | ||
f6f4d8d4 JM |
1503 | -- Evaluate if we can statically displace the pointer to the object |
1504 | ||
1505 | declare | |
1506 | Opnd_Typ : constant Node_Id := Underlying_Record_Type (Operand_Typ); | |
1507 | ||
1508 | begin | |
1509 | Is_Static := | |
1510 | not Is_Interface (Opnd_Typ) | |
1511 | and then Interface_Present_In_Ancestor | |
1512 | (Typ => Opnd_Typ, | |
1513 | Iface => Iface_Typ) | |
1514 | and then (Etype (Opnd_Typ) = Opnd_Typ | |
1515 | or else not | |
1516 | Is_Variable_Size_Record (Etype (Opnd_Typ))); | |
1517 | end; | |
758c442c | 1518 | |
1f110335 | 1519 | if not Tagged_Type_Expansion then |
d0dd5209 | 1520 | return; |
9d2a2071 | 1521 | |
304757d2 | 1522 | -- A static conversion to an interface type that is not class-wide is |
9d2a2071 AC |
1523 | -- curious but legal if the interface operation is a null procedure. |
1524 | -- If the operation is abstract it will be rejected later. | |
1525 | ||
1526 | elsif Is_Static | |
1527 | and then Is_Interface (Etype (N)) | |
1528 | and then not Is_Class_Wide_Type (Etype (N)) | |
1529 | and then Comes_From_Source (N) | |
1530 | then | |
1531 | Rewrite (N, Unchecked_Convert_To (Etype (N), N)); | |
1532 | Analyze (N); | |
1533 | return; | |
d0dd5209 JM |
1534 | end if; |
1535 | ||
4d744221 | 1536 | if not Is_Static then |
b0efe69e | 1537 | |
304757d2 | 1538 | -- Give error if configurable run-time and Displace not available |
b0efe69e JM |
1539 | |
1540 | if not RTE_Available (RE_Displace) then | |
f2cbd970 | 1541 | Error_Msg_CRT ("dynamic interface conversion", N); |
b0efe69e JM |
1542 | return; |
1543 | end if; | |
1544 | ||
d0dd5209 JM |
1545 | -- Handle conversion of access-to-class-wide interface types. Target |
1546 | -- can be an access to an object or an access to another class-wide | |
1547 | -- interface (see -1- and -2- in the following example): | |
bfef8d0d JM |
1548 | |
1549 | -- type Iface1_Ref is access all Iface1'Class; | |
1550 | -- type Iface2_Ref is access all Iface1'Class; | |
1551 | ||
1552 | -- Acc1 : Iface1_Ref := new ... | |
1553 | -- Obj : Obj_Ref := Obj_Ref (Acc); -- 1 | |
1554 | -- Acc2 : Iface2_Ref := Iface2_Ref (Acc); -- 2 | |
1555 | ||
1556 | if Is_Access_Type (Operand_Typ) then | |
bfef8d0d JM |
1557 | Rewrite (N, |
1558 | Unchecked_Convert_To (Etype (N), | |
1559 | Make_Function_Call (Loc, | |
e4494292 | 1560 | Name => New_Occurrence_Of (RTE (RE_Displace), Loc), |
bfef8d0d JM |
1561 | Parameter_Associations => New_List ( |
1562 | ||
1563 | Unchecked_Convert_To (RTE (RE_Address), | |
1564 | Relocate_Node (Expression (N))), | |
1565 | ||
1566 | New_Occurrence_Of | |
1567 | (Node (First_Elmt (Access_Disp_Table (Iface_Typ))), | |
1568 | Loc))))); | |
1569 | ||
1570 | Analyze (N); | |
1571 | return; | |
1572 | end if; | |
1573 | ||
4d744221 JM |
1574 | Rewrite (N, |
1575 | Make_Function_Call (Loc, | |
e4494292 | 1576 | Name => New_Occurrence_Of (RTE (RE_Displace), Loc), |
4d744221 JM |
1577 | Parameter_Associations => New_List ( |
1578 | Make_Attribute_Reference (Loc, | |
1579 | Prefix => Relocate_Node (Expression (N)), | |
1580 | Attribute_Name => Name_Address), | |
bfef8d0d | 1581 | |
4d744221 JM |
1582 | New_Occurrence_Of |
1583 | (Node (First_Elmt (Access_Disp_Table (Iface_Typ))), | |
1584 | Loc)))); | |
1585 | ||
1586 | Analyze (N); | |
1587 | ||
6782b1ef AC |
1588 | -- If target is a class-wide interface, change the type of the data |
1589 | -- returned by IW_Convert to indicate this is a dispatching call. | |
4d744221 | 1590 | |
b2e1beb3 ES |
1591 | declare |
1592 | New_Itype : Entity_Id; | |
4d744221 | 1593 | |
b2e1beb3 ES |
1594 | begin |
1595 | New_Itype := Create_Itype (E_Anonymous_Access_Type, N); | |
f2cbd970 | 1596 | Set_Etype (New_Itype, New_Itype); |
b2e1beb3 | 1597 | Set_Directly_Designated_Type (New_Itype, Etyp); |
4d744221 | 1598 | |
b2e1beb3 ES |
1599 | Rewrite (N, |
1600 | Make_Explicit_Dereference (Loc, | |
1601 | Prefix => | |
1602 | Unchecked_Convert_To (New_Itype, Relocate_Node (N)))); | |
1603 | Analyze (N); | |
1604 | Freeze_Itype (New_Itype, N); | |
1605 | ||
1606 | return; | |
1607 | end; | |
4d744221 JM |
1608 | end if; |
1609 | ||
10b93b2e | 1610 | Iface_Tag := Find_Interface_Tag (Operand_Typ, Iface_Typ); |
d58008d2 | 1611 | pragma Assert (Present (Iface_Tag)); |
758c442c | 1612 | |
10b93b2e | 1613 | -- Keep separate access types to interfaces because one internal |
bed8af19 | 1614 | -- function is used to handle the null value (see following comments) |
10b93b2e HK |
1615 | |
1616 | if not Is_Access_Type (Etype (N)) then | |
bed8af19 | 1617 | |
6782b1ef AC |
1618 | -- Statically displace the pointer to the object to reference the |
1619 | -- component containing the secondary dispatch table. | |
bed8af19 | 1620 | |
10b93b2e | 1621 | Rewrite (N, |
bed8af19 | 1622 | Convert_Tag_To_Interface (Class_Wide_Type (Iface_Typ), |
10b93b2e HK |
1623 | Make_Selected_Component (Loc, |
1624 | Prefix => Relocate_Node (Expression (N)), | |
bed8af19 | 1625 | Selector_Name => New_Occurrence_Of (Iface_Tag, Loc)))); |
10b93b2e HK |
1626 | |
1627 | else | |
a90bd866 RD |
1628 | -- Build internal function to handle the case in which the actual is |
1629 | -- null. If the actual is null returns null because no displacement | |
1630 | -- is required; otherwise performs a type conversion that will be | |
1631 | -- expanded in the code that returns the value of the displaced | |
1632 | -- actual. That is: | |
10b93b2e | 1633 | |
bfef8d0d | 1634 | -- function Func (O : Address) return Iface_Typ is |
b2e1beb3 ES |
1635 | -- type Op_Typ is access all Operand_Typ; |
1636 | -- Aux : Op_Typ := To_Op_Typ (O); | |
10b93b2e | 1637 | -- begin |
bfef8d0d | 1638 | -- if O = Null_Address then |
10b93b2e HK |
1639 | -- return null; |
1640 | -- else | |
b2e1beb3 | 1641 | -- return Iface_Typ!(Aux.Iface_Tag'Address); |
10b93b2e HK |
1642 | -- end if; |
1643 | -- end Func; | |
1644 | ||
bfef8d0d | 1645 | declare |
b2e1beb3 ES |
1646 | Desig_Typ : Entity_Id; |
1647 | Fent : Entity_Id; | |
1648 | New_Typ_Decl : Node_Id; | |
b2e1beb3 ES |
1649 | Stats : List_Id; |
1650 | ||
bfef8d0d JM |
1651 | begin |
1652 | Desig_Typ := Etype (Expression (N)); | |
10b93b2e | 1653 | |
bfef8d0d | 1654 | if Is_Access_Type (Desig_Typ) then |
c2369146 AC |
1655 | Desig_Typ := |
1656 | Available_View (Directly_Designated_Type (Desig_Typ)); | |
bfef8d0d | 1657 | end if; |
10b93b2e | 1658 | |
6e818918 JM |
1659 | if Is_Concurrent_Type (Desig_Typ) then |
1660 | Desig_Typ := Base_Type (Corresponding_Record_Type (Desig_Typ)); | |
1661 | end if; | |
1662 | ||
b2e1beb3 ES |
1663 | New_Typ_Decl := |
1664 | Make_Full_Type_Declaration (Loc, | |
2287a75d | 1665 | Defining_Identifier => Make_Temporary (Loc, 'T'), |
b2e1beb3 ES |
1666 | Type_Definition => |
1667 | Make_Access_To_Object_Definition (Loc, | |
1668 | All_Present => True, | |
1669 | Null_Exclusion_Present => False, | |
1670 | Constant_Present => False, | |
1671 | Subtype_Indication => | |
e4494292 | 1672 | New_Occurrence_Of (Desig_Typ, Loc))); |
10b93b2e | 1673 | |
d0dd5209 | 1674 | Stats := New_List ( |
b2e1beb3 ES |
1675 | Make_Simple_Return_Statement (Loc, |
1676 | Unchecked_Convert_To (Etype (N), | |
1677 | Make_Attribute_Reference (Loc, | |
6782b1ef | 1678 | Prefix => |
b2e1beb3 | 1679 | Make_Selected_Component (Loc, |
6782b1ef | 1680 | Prefix => |
6e818918 JM |
1681 | Unchecked_Convert_To |
1682 | (Defining_Identifier (New_Typ_Decl), | |
1683 | Make_Identifier (Loc, Name_uO)), | |
b2e1beb3 ES |
1684 | Selector_Name => |
1685 | New_Occurrence_Of (Iface_Tag, Loc)), | |
1686 | Attribute_Name => Name_Address)))); | |
d0dd5209 | 1687 | |
b2e1beb3 ES |
1688 | -- If the type is null-excluding, no need for the null branch. |
1689 | -- Otherwise we need to check for it and return null. | |
1690 | ||
1691 | if not Can_Never_Be_Null (Etype (N)) then | |
1692 | Stats := New_List ( | |
1693 | Make_If_Statement (Loc, | |
1694 | Condition => | |
1695 | Make_Op_Eq (Loc, | |
1696 | Left_Opnd => Make_Identifier (Loc, Name_uO), | |
e4494292 | 1697 | Right_Opnd => New_Occurrence_Of |
b2e1beb3 ES |
1698 | (RTE (RE_Null_Address), Loc)), |
1699 | ||
1700 | Then_Statements => New_List ( | |
6782b1ef | 1701 | Make_Simple_Return_Statement (Loc, Make_Null (Loc))), |
b2e1beb3 ES |
1702 | Else_Statements => Stats)); |
1703 | end if; | |
10b93b2e | 1704 | |
2287a75d | 1705 | Fent := Make_Temporary (Loc, 'F'); |
b2e1beb3 ES |
1706 | Func := |
1707 | Make_Subprogram_Body (Loc, | |
1708 | Specification => | |
1709 | Make_Function_Specification (Loc, | |
1710 | Defining_Unit_Name => Fent, | |
10b93b2e | 1711 | |
b2e1beb3 ES |
1712 | Parameter_Specifications => New_List ( |
1713 | Make_Parameter_Specification (Loc, | |
1714 | Defining_Identifier => | |
1715 | Make_Defining_Identifier (Loc, Name_uO), | |
1716 | Parameter_Type => | |
e4494292 | 1717 | New_Occurrence_Of (RTE (RE_Address), Loc))), |
10b93b2e | 1718 | |
b2e1beb3 | 1719 | Result_Definition => |
e4494292 | 1720 | New_Occurrence_Of (Etype (N), Loc)), |
10b93b2e | 1721 | |
6e818918 | 1722 | Declarations => New_List (New_Typ_Decl), |
10b93b2e | 1723 | |
b2e1beb3 ES |
1724 | Handled_Statement_Sequence => |
1725 | Make_Handled_Sequence_Of_Statements (Loc, Stats)); | |
10b93b2e | 1726 | |
b2e1beb3 ES |
1727 | -- Place function body before the expression containing the |
1728 | -- conversion. We suppress all checks because the body of the | |
1729 | -- internally generated function already takes care of the case | |
1730 | -- in which the actual is null; therefore there is no need to | |
1731 | -- double check that the pointer is not null when the program | |
1732 | -- executes the alternative that performs the type conversion). | |
bfef8d0d | 1733 | |
b2e1beb3 | 1734 | Insert_Action (N, Func, Suppress => All_Checks); |
bfef8d0d | 1735 | |
b2e1beb3 | 1736 | if Is_Access_Type (Etype (Expression (N))) then |
bfef8d0d | 1737 | |
6e818918 | 1738 | -- Generate: Func (Address!(Expression)) |
bfef8d0d | 1739 | |
b2e1beb3 ES |
1740 | Rewrite (N, |
1741 | Make_Function_Call (Loc, | |
95e0ceef | 1742 | Name => New_Occurrence_Of (Fent, Loc), |
b2e1beb3 | 1743 | Parameter_Associations => New_List ( |
6e818918 JM |
1744 | Unchecked_Convert_To (RTE (RE_Address), |
1745 | Relocate_Node (Expression (N)))))); | |
b2e1beb3 ES |
1746 | |
1747 | else | |
6e818918 | 1748 | -- Generate: Func (Operand_Typ!(Expression)'Address) |
b2e1beb3 ES |
1749 | |
1750 | Rewrite (N, | |
1751 | Make_Function_Call (Loc, | |
95e0ceef | 1752 | Name => New_Occurrence_Of (Fent, Loc), |
b2e1beb3 ES |
1753 | Parameter_Associations => New_List ( |
1754 | Make_Attribute_Reference (Loc, | |
1755 | Prefix => Unchecked_Convert_To (Operand_Typ, | |
1756 | Relocate_Node (Expression (N))), | |
1757 | Attribute_Name => Name_Address)))); | |
1758 | end if; | |
1759 | end; | |
10b93b2e | 1760 | end if; |
758c442c GD |
1761 | |
1762 | Analyze (N); | |
1763 | end Expand_Interface_Conversion; | |
1764 | ||
1765 | ------------------------------ | |
1766 | -- Expand_Interface_Actuals -- | |
1767 | ------------------------------ | |
1768 | ||
1769 | procedure Expand_Interface_Actuals (Call_Node : Node_Id) is | |
758c442c | 1770 | Actual : Node_Id; |
10b93b2e | 1771 | Actual_Dup : Node_Id; |
758c442c | 1772 | Actual_Typ : Entity_Id; |
10b93b2e | 1773 | Anon : Entity_Id; |
758c442c GD |
1774 | Conversion : Node_Id; |
1775 | Formal : Entity_Id; | |
1776 | Formal_Typ : Entity_Id; | |
1777 | Subp : Entity_Id; | |
1f8766d3 AC |
1778 | Formal_DDT : Entity_Id := Empty; -- initialize to prevent warning |
1779 | Actual_DDT : Entity_Id := Empty; -- initialize to prevent warning | |
758c442c GD |
1780 | |
1781 | begin | |
1782 | -- This subprogram is called directly from the semantics, so we need a | |
1783 | -- check to see whether expansion is active before proceeding. | |
1784 | ||
1785 | if not Expander_Active then | |
1786 | return; | |
1787 | end if; | |
1788 | ||
1789 | -- Call using access to subprogram with explicit dereference | |
1790 | ||
1791 | if Nkind (Name (Call_Node)) = N_Explicit_Dereference then | |
1792 | Subp := Etype (Name (Call_Node)); | |
1793 | ||
2a26a7ec JM |
1794 | -- Call using selected component |
1795 | ||
1796 | elsif Nkind (Name (Call_Node)) = N_Selected_Component then | |
1797 | Subp := Entity (Selector_Name (Name (Call_Node))); | |
1798 | ||
1799 | -- Call using direct name | |
758c442c GD |
1800 | |
1801 | else | |
1802 | Subp := Entity (Name (Call_Node)); | |
1803 | end if; | |
1804 | ||
d0dd5209 JM |
1805 | -- Ada 2005 (AI-251): Look for interface type formals to force "this" |
1806 | -- displacement | |
1807 | ||
758c442c GD |
1808 | Formal := First_Formal (Subp); |
1809 | Actual := First_Actual (Call_Node); | |
758c442c | 1810 | while Present (Formal) loop |
d0dd5209 | 1811 | Formal_Typ := Etype (Formal); |
10b93b2e | 1812 | |
5a644684 JM |
1813 | if Has_Non_Limited_View (Formal_Typ) then |
1814 | Formal_Typ := Non_Limited_View (Formal_Typ); | |
1815 | end if; | |
1816 | ||
10b93b2e HK |
1817 | if Ekind (Formal_Typ) = E_Record_Type_With_Private then |
1818 | Formal_Typ := Full_View (Formal_Typ); | |
1819 | end if; | |
1820 | ||
1821 | if Is_Access_Type (Formal_Typ) then | |
1822 | Formal_DDT := Directly_Designated_Type (Formal_Typ); | |
5a644684 JM |
1823 | |
1824 | if Has_Non_Limited_View (Formal_DDT) then | |
1825 | Formal_DDT := Non_Limited_View (Formal_DDT); | |
1826 | end if; | |
10b93b2e HK |
1827 | end if; |
1828 | ||
758c442c GD |
1829 | Actual_Typ := Etype (Actual); |
1830 | ||
5a644684 JM |
1831 | if Has_Non_Limited_View (Actual_Typ) then |
1832 | Actual_Typ := Non_Limited_View (Actual_Typ); | |
1833 | end if; | |
1834 | ||
10b93b2e HK |
1835 | if Is_Access_Type (Actual_Typ) then |
1836 | Actual_DDT := Directly_Designated_Type (Actual_Typ); | |
5a644684 JM |
1837 | |
1838 | if Has_Non_Limited_View (Actual_DDT) then | |
1839 | Actual_DDT := Non_Limited_View (Actual_DDT); | |
1840 | end if; | |
10b93b2e HK |
1841 | end if; |
1842 | ||
d0dd5209 JM |
1843 | if Is_Interface (Formal_Typ) |
1844 | and then Is_Class_Wide_Type (Formal_Typ) | |
1845 | then | |
10b93b2e | 1846 | -- No need to displace the pointer if the type of the actual |
3b42c566 | 1847 | -- coincides with the type of the formal. |
758c442c | 1848 | |
d0dd5209 | 1849 | if Actual_Typ = Formal_Typ then |
10b93b2e HK |
1850 | null; |
1851 | ||
6782b1ef AC |
1852 | -- No need to displace the pointer if the interface type is a |
1853 | -- parent of the type of the actual because in this case the | |
d0dd5209 | 1854 | -- interface primitives are located in the primary dispatch table. |
758c442c | 1855 | |
4ac2477e JM |
1856 | elsif Is_Ancestor (Formal_Typ, Actual_Typ, |
1857 | Use_Full_View => True) | |
1858 | then | |
10b93b2e HK |
1859 | null; |
1860 | ||
6782b1ef AC |
1861 | -- Implicit conversion to the class-wide formal type to force the |
1862 | -- displacement of the pointer. | |
d0dd5209 | 1863 | |
10b93b2e | 1864 | else |
23b86353 AC |
1865 | -- Normally, expansion of actuals for calls to build-in-place |
1866 | -- functions happens as part of Expand_Actuals, but in this | |
1867 | -- case the call will be wrapped in a conversion and soon after | |
1868 | -- expanded further to handle the displacement for a class-wide | |
1869 | -- interface conversion, so if this is a BIP call then we need | |
1870 | -- to handle it now. | |
1871 | ||
d4dfb005 | 1872 | if Is_Build_In_Place_Function_Call (Actual) then |
23b86353 AC |
1873 | Make_Build_In_Place_Call_In_Anonymous_Context (Actual); |
1874 | end if; | |
1875 | ||
10b93b2e | 1876 | Conversion := Convert_To (Formal_Typ, Relocate_Node (Actual)); |
d0dd5209 | 1877 | Rewrite (Actual, Conversion); |
10b93b2e HK |
1878 | Analyze_And_Resolve (Actual, Formal_Typ); |
1879 | end if; | |
758c442c | 1880 | |
d0dd5209 | 1881 | -- Access to class-wide interface type |
758c442c GD |
1882 | |
1883 | elsif Is_Access_Type (Formal_Typ) | |
d0dd5209 JM |
1884 | and then Is_Interface (Formal_DDT) |
1885 | and then Is_Class_Wide_Type (Formal_DDT) | |
758c442c | 1886 | and then Interface_Present_In_Ancestor |
10b93b2e HK |
1887 | (Typ => Actual_DDT, |
1888 | Iface => Etype (Formal_DDT)) | |
758c442c | 1889 | then |
d0dd5209 JM |
1890 | -- Handle attributes 'Access and 'Unchecked_Access |
1891 | ||
758c442c GD |
1892 | if Nkind (Actual) = N_Attribute_Reference |
1893 | and then | |
1894 | (Attribute_Name (Actual) = Name_Access | |
1895 | or else Attribute_Name (Actual) = Name_Unchecked_Access) | |
1896 | then | |
3192631e JM |
1897 | -- This case must have been handled by the analysis and |
1898 | -- expansion of 'Access. The only exception is when types | |
1899 | -- match and no further expansion is required. | |
758c442c | 1900 | |
3192631e JM |
1901 | pragma Assert (Base_Type (Etype (Prefix (Actual))) |
1902 | = Base_Type (Formal_DDT)); | |
1903 | null; | |
758c442c | 1904 | |
d0dd5209 JM |
1905 | -- No need to displace the pointer if the type of the actual |
1906 | -- coincides with the type of the formal. | |
10b93b2e | 1907 | |
d0dd5209 | 1908 | elsif Actual_DDT = Formal_DDT then |
10b93b2e HK |
1909 | null; |
1910 | ||
d0dd5209 JM |
1911 | -- No need to displace the pointer if the interface type is |
1912 | -- a parent of the type of the actual because in this case the | |
1913 | -- interface primitives are located in the primary dispatch table. | |
10b93b2e | 1914 | |
4ac2477e JM |
1915 | elsif Is_Ancestor (Formal_DDT, Actual_DDT, |
1916 | Use_Full_View => True) | |
1917 | then | |
10b93b2e HK |
1918 | null; |
1919 | ||
758c442c | 1920 | else |
10b93b2e HK |
1921 | Actual_Dup := Relocate_Node (Actual); |
1922 | ||
7b56a91b | 1923 | if From_Limited_With (Actual_Typ) then |
10b93b2e | 1924 | |
15529d0a PMR |
1925 | -- If the type of the actual parameter comes from a limited |
1926 | -- with_clause and the nonlimited view is already available, | |
1927 | -- we replace the anonymous access type by a duplicate | |
1928 | -- declaration whose designated type is the nonlimited view. | |
10b93b2e | 1929 | |
47346923 | 1930 | if Has_Non_Limited_View (Actual_DDT) then |
10b93b2e HK |
1931 | Anon := New_Copy (Actual_Typ); |
1932 | ||
1933 | if Is_Itype (Anon) then | |
1934 | Set_Scope (Anon, Current_Scope); | |
1935 | end if; | |
1936 | ||
e23e04db AC |
1937 | Set_Directly_Designated_Type |
1938 | (Anon, Non_Limited_View (Actual_DDT)); | |
10b93b2e | 1939 | Set_Etype (Actual_Dup, Anon); |
10b93b2e HK |
1940 | end if; |
1941 | end if; | |
1942 | ||
1943 | Conversion := Convert_To (Formal_Typ, Actual_Dup); | |
1944 | Rewrite (Actual, Conversion); | |
758c442c GD |
1945 | Analyze_And_Resolve (Actual, Formal_Typ); |
1946 | end if; | |
1947 | end if; | |
1948 | ||
1949 | Next_Actual (Actual); | |
1950 | Next_Formal (Formal); | |
1951 | end loop; | |
1952 | end Expand_Interface_Actuals; | |
1953 | ||
1954 | ---------------------------- | |
1955 | -- Expand_Interface_Thunk -- | |
1956 | ---------------------------- | |
1957 | ||
d0dd5209 | 1958 | procedure Expand_Interface_Thunk |
b2e1beb3 ES |
1959 | (Prim : Node_Id; |
1960 | Thunk_Id : out Entity_Id; | |
20dc266e JM |
1961 | Thunk_Code : out Node_Id; |
1962 | Iface : Entity_Id) | |
758c442c | 1963 | is |
95cb33a5 AC |
1964 | Loc : constant Source_Ptr := Sloc (Prim); |
1965 | Actuals : constant List_Id := New_List; | |
1966 | Decl : constant List_Id := New_List; | |
1967 | Formals : constant List_Id := New_List; | |
1968 | Target : constant Entity_Id := Ultimate_Alias (Prim); | |
d0dd5209 | 1969 | |
b9daa96e AC |
1970 | Decl_1 : Node_Id; |
1971 | Decl_2 : Node_Id; | |
1972 | Expr : Node_Id; | |
1973 | Formal : Node_Id; | |
1974 | Ftyp : Entity_Id; | |
1f8766d3 | 1975 | Iface_Formal : Node_Id := Empty; -- initialize to prevent warning |
4faf522b JM |
1976 | Is_Predef_Op : constant Boolean := |
1977 | Is_Predefined_Dispatching_Operation (Prim) | |
1978 | or else Is_Predefined_Dispatching_Operation (Target); | |
b9daa96e AC |
1979 | New_Arg : Node_Id; |
1980 | Offset_To_Top : Node_Id; | |
1981 | Target_Formal : Entity_Id; | |
758c442c GD |
1982 | |
1983 | begin | |
d0dd5209 JM |
1984 | Thunk_Id := Empty; |
1985 | Thunk_Code := Empty; | |
1986 | ||
9e9df9da AC |
1987 | -- No thunk needed if the primitive has been eliminated |
1988 | ||
4faf522b | 1989 | if Is_Eliminated (Target) then |
9e9df9da AC |
1990 | return; |
1991 | ||
95cb33a5 AC |
1992 | -- In case of primitives that are functions without formals and a |
1993 | -- controlling result there is no need to build the thunk. | |
d0dd5209 | 1994 | |
9e9df9da | 1995 | elsif not Present (First_Formal (Target)) then |
d0dd5209 JM |
1996 | pragma Assert (Ekind (Target) = E_Function |
1997 | and then Has_Controlling_Result (Target)); | |
1998 | return; | |
1999 | end if; | |
2000 | ||
21d11f4f AC |
2001 | -- Duplicate the formals of the Target primitive. In the thunk, the type |
2002 | -- of the controlling formal is the covered interface type (instead of | |
2003 | -- the target tagged type). Done to avoid problems with discriminated | |
2004 | -- tagged types because, if the controlling type has discriminants with | |
95cb33a5 AC |
2005 | -- default values, then the type conversions done inside the body of |
2006 | -- the thunk (after the displacement of the pointer to the base of the | |
21d11f4f AC |
2007 | -- actual object) generate code that modify its contents. |
2008 | ||
2009 | -- Note: This special management is not done for predefined primitives | |
4faf522b JM |
2010 | -- because they don't have available the Interface_Alias attribute (see |
2011 | -- Sem_Ch3.Add_Internal_Interface_Entities). | |
21d11f4f | 2012 | |
4faf522b | 2013 | if not Is_Predef_Op then |
21d11f4f AC |
2014 | Iface_Formal := First_Formal (Interface_Alias (Prim)); |
2015 | end if; | |
758c442c | 2016 | |
10b93b2e | 2017 | Formal := First_Formal (Target); |
758c442c | 2018 | while Present (Formal) loop |
21d11f4f AC |
2019 | Ftyp := Etype (Formal); |
2020 | ||
2021 | -- Use the interface type as the type of the controlling formal (see | |
95cb33a5 | 2022 | -- comment above). |
21d11f4f | 2023 | |
20dc266e | 2024 | if not Is_Controlling_Formal (Formal) then |
21d11f4f AC |
2025 | Ftyp := Etype (Formal); |
2026 | Expr := New_Copy_Tree (Expression (Parent (Formal))); | |
20dc266e JM |
2027 | |
2028 | -- For predefined primitives the controlling type of the thunk is | |
2029 | -- the interface type passed by the caller (since they don't have | |
2030 | -- available the Interface_Alias attribute; see comment above). | |
2031 | ||
2032 | elsif Is_Predef_Op then | |
2033 | Ftyp := Iface; | |
2034 | Expr := Empty; | |
2035 | ||
21d11f4f AC |
2036 | else |
2037 | Ftyp := Etype (Iface_Formal); | |
2038 | Expr := Empty; | |
20dc266e JM |
2039 | |
2040 | -- Sanity check performed to ensure the proper controlling type | |
2041 | -- when the thunk has exactly one controlling parameter and it | |
2042 | -- comes first. In such case the GCC backend reuses the C++ | |
2043 | -- thunks machinery which perform a computation equivalent to | |
2044 | -- the code generated by the expander; for other cases the GCC | |
2045 | -- backend translates the expanded code unmodified. However, as | |
2046 | -- a generalization, the check is performed for all controlling | |
2047 | -- types. | |
2048 | ||
2049 | if Is_Access_Type (Ftyp) then | |
2050 | pragma Assert (Base_Type (Designated_Type (Ftyp)) = Iface); | |
2051 | null; | |
2052 | else | |
2053 | Ftyp := Base_Type (Ftyp); | |
2054 | pragma Assert (Ftyp = Iface); | |
2055 | end if; | |
21d11f4f AC |
2056 | end if; |
2057 | ||
d0dd5209 JM |
2058 | Append_To (Formals, |
2059 | Make_Parameter_Specification (Loc, | |
2060 | Defining_Identifier => | |
2061 | Make_Defining_Identifier (Sloc (Formal), | |
2062 | Chars => Chars (Formal)), | |
2063 | In_Present => In_Present (Parent (Formal)), | |
2064 | Out_Present => Out_Present (Parent (Formal)), | |
e4494292 | 2065 | Parameter_Type => New_Occurrence_Of (Ftyp, Loc), |
21d11f4f AC |
2066 | Expression => Expr)); |
2067 | ||
4faf522b | 2068 | if not Is_Predef_Op then |
21d11f4f AC |
2069 | Next_Formal (Iface_Formal); |
2070 | end if; | |
10b93b2e | 2071 | |
758c442c GD |
2072 | Next_Formal (Formal); |
2073 | end loop; | |
2074 | ||
d0dd5209 JM |
2075 | Target_Formal := First_Formal (Target); |
2076 | Formal := First (Formals); | |
2077 | while Present (Formal) loop | |
21d11f4f | 2078 | |
b29def53 AC |
2079 | -- If the parent is a constrained discriminated type, then the |
2080 | -- primitive operation will have been defined on a first subtype. | |
2081 | -- For proper matching with controlling type, use base type. | |
21d11f4f AC |
2082 | |
2083 | if Ekind (Target_Formal) = E_In_Parameter | |
2084 | and then Ekind (Etype (Target_Formal)) = E_Anonymous_Access_Type | |
2085 | then | |
b29def53 AC |
2086 | Ftyp := |
2087 | Base_Type (Directly_Designated_Type (Etype (Target_Formal))); | |
21d11f4f | 2088 | else |
7cec010e | 2089 | Ftyp := Base_Type (Etype (Target_Formal)); |
21d11f4f AC |
2090 | end if; |
2091 | ||
c736294d RD |
2092 | -- For concurrent types, the relevant information is found in the |
2093 | -- Corresponding_Record_Type, rather than the type entity itself. | |
b29def53 | 2094 | |
21d11f4f AC |
2095 | if Is_Concurrent_Type (Ftyp) then |
2096 | Ftyp := Corresponding_Record_Type (Ftyp); | |
2097 | end if; | |
2098 | ||
d0dd5209 JM |
2099 | if Ekind (Target_Formal) = E_In_Parameter |
2100 | and then Ekind (Etype (Target_Formal)) = E_Anonymous_Access_Type | |
de6cad7c | 2101 | and then Is_Controlling_Formal (Target_Formal) |
d0dd5209 JM |
2102 | then |
2103 | -- Generate: | |
b2e1beb3 ES |
2104 | -- type T is access all <<type of the target formal>> |
2105 | -- S : Storage_Offset := Storage_Offset!(Formal) | |
d0567dc0 | 2106 | -- + Offset_To_Top (address!(Formal)) |
d0dd5209 JM |
2107 | |
2108 | Decl_2 := | |
2109 | Make_Full_Type_Declaration (Loc, | |
2287a75d | 2110 | Defining_Identifier => Make_Temporary (Loc, 'T'), |
d0dd5209 JM |
2111 | Type_Definition => |
2112 | Make_Access_To_Object_Definition (Loc, | |
2113 | All_Present => True, | |
2114 | Null_Exclusion_Present => False, | |
2115 | Constant_Present => False, | |
2116 | Subtype_Indication => | |
e4494292 | 2117 | New_Occurrence_Of (Ftyp, Loc))); |
d0dd5209 | 2118 | |
f2cbd970 JM |
2119 | New_Arg := |
2120 | Unchecked_Convert_To (RTE (RE_Address), | |
e4494292 | 2121 | New_Occurrence_Of (Defining_Identifier (Formal), Loc)); |
f2cbd970 JM |
2122 | |
2123 | if not RTE_Available (RE_Offset_To_Top) then | |
2124 | Offset_To_Top := | |
2125 | Build_Offset_To_Top (Loc, New_Arg); | |
2126 | else | |
2127 | Offset_To_Top := | |
2128 | Make_Function_Call (Loc, | |
e4494292 | 2129 | Name => New_Occurrence_Of (RTE (RE_Offset_To_Top), Loc), |
f2cbd970 JM |
2130 | Parameter_Associations => New_List (New_Arg)); |
2131 | end if; | |
2132 | ||
d0dd5209 JM |
2133 | Decl_1 := |
2134 | Make_Object_Declaration (Loc, | |
2287a75d | 2135 | Defining_Identifier => Make_Temporary (Loc, 'S'), |
d0dd5209 JM |
2136 | Constant_Present => True, |
2137 | Object_Definition => | |
e4494292 | 2138 | New_Occurrence_Of (RTE (RE_Storage_Offset), Loc), |
d0dd5209 | 2139 | Expression => |
d0567dc0 | 2140 | Make_Op_Add (Loc, |
d0dd5209 JM |
2141 | Left_Opnd => |
2142 | Unchecked_Convert_To | |
2143 | (RTE (RE_Storage_Offset), | |
e4494292 RD |
2144 | New_Occurrence_Of |
2145 | (Defining_Identifier (Formal), Loc)), | |
d0dd5209 | 2146 | Right_Opnd => |
f2cbd970 | 2147 | Offset_To_Top)); |
d0dd5209 JM |
2148 | |
2149 | Append_To (Decl, Decl_2); | |
2150 | Append_To (Decl, Decl_1); | |
2151 | ||
b2e1beb3 ES |
2152 | -- Reference the new actual. Generate: |
2153 | -- T!(S) | |
d0dd5209 JM |
2154 | |
2155 | Append_To (Actuals, | |
2156 | Unchecked_Convert_To | |
2157 | (Defining_Identifier (Decl_2), | |
e4494292 | 2158 | New_Occurrence_Of (Defining_Identifier (Decl_1), Loc))); |
d0dd5209 | 2159 | |
de6cad7c | 2160 | elsif Is_Controlling_Formal (Target_Formal) then |
758c442c | 2161 | |
95cb33a5 | 2162 | -- Generate: |
b2e1beb3 | 2163 | -- S1 : Storage_Offset := Storage_Offset!(Formal'Address) |
d0567dc0 | 2164 | -- + Offset_To_Top (Formal'Address) |
b2e1beb3 | 2165 | -- S2 : Addr_Ptr := Addr_Ptr!(S1) |
758c442c | 2166 | |
f2cbd970 JM |
2167 | New_Arg := |
2168 | Make_Attribute_Reference (Loc, | |
2169 | Prefix => | |
e4494292 | 2170 | New_Occurrence_Of (Defining_Identifier (Formal), Loc), |
f2cbd970 JM |
2171 | Attribute_Name => |
2172 | Name_Address); | |
2173 | ||
2174 | if not RTE_Available (RE_Offset_To_Top) then | |
2175 | Offset_To_Top := | |
2176 | Build_Offset_To_Top (Loc, New_Arg); | |
2177 | else | |
2178 | Offset_To_Top := | |
2179 | Make_Function_Call (Loc, | |
e4494292 | 2180 | Name => New_Occurrence_Of (RTE (RE_Offset_To_Top), Loc), |
f2cbd970 JM |
2181 | Parameter_Associations => New_List (New_Arg)); |
2182 | end if; | |
2183 | ||
d0dd5209 JM |
2184 | Decl_1 := |
2185 | Make_Object_Declaration (Loc, | |
2287a75d | 2186 | Defining_Identifier => Make_Temporary (Loc, 'S'), |
d0dd5209 JM |
2187 | Constant_Present => True, |
2188 | Object_Definition => | |
e4494292 | 2189 | New_Occurrence_Of (RTE (RE_Storage_Offset), Loc), |
d0dd5209 | 2190 | Expression => |
d0567dc0 | 2191 | Make_Op_Add (Loc, |
d0dd5209 JM |
2192 | Left_Opnd => |
2193 | Unchecked_Convert_To | |
2194 | (RTE (RE_Storage_Offset), | |
2195 | Make_Attribute_Reference (Loc, | |
2196 | Prefix => | |
e4494292 | 2197 | New_Occurrence_Of |
d0dd5209 JM |
2198 | (Defining_Identifier (Formal), Loc), |
2199 | Attribute_Name => Name_Address)), | |
2200 | Right_Opnd => | |
f2cbd970 | 2201 | Offset_To_Top)); |
758c442c | 2202 | |
d0dd5209 JM |
2203 | Decl_2 := |
2204 | Make_Object_Declaration (Loc, | |
2287a75d AC |
2205 | Defining_Identifier => Make_Temporary (Loc, 'S'), |
2206 | Constant_Present => True, | |
2207 | Object_Definition => | |
e4494292 | 2208 | New_Occurrence_Of (RTE (RE_Addr_Ptr), Loc), |
2287a75d | 2209 | Expression => |
d0dd5209 JM |
2210 | Unchecked_Convert_To |
2211 | (RTE (RE_Addr_Ptr), | |
e4494292 | 2212 | New_Occurrence_Of (Defining_Identifier (Decl_1), Loc))); |
758c442c | 2213 | |
d0dd5209 JM |
2214 | Append_To (Decl, Decl_1); |
2215 | Append_To (Decl, Decl_2); | |
4d744221 | 2216 | |
2287a75d | 2217 | -- Reference the new actual, generate: |
b2e1beb3 | 2218 | -- Target_Formal (S2.all) |
758c442c | 2219 | |
d0dd5209 | 2220 | Append_To (Actuals, |
21d11f4f | 2221 | Unchecked_Convert_To (Ftyp, |
d0dd5209 | 2222 | Make_Explicit_Dereference (Loc, |
e4494292 | 2223 | New_Occurrence_Of (Defining_Identifier (Decl_2), Loc)))); |
758c442c | 2224 | |
8a49a499 AC |
2225 | -- Ensure proper matching of access types. Required to avoid |
2226 | -- reporting spurious errors. | |
2227 | ||
2228 | elsif Is_Access_Type (Etype (Target_Formal)) then | |
2229 | Append_To (Actuals, | |
2230 | Unchecked_Convert_To (Base_Type (Etype (Target_Formal)), | |
e4494292 | 2231 | New_Occurrence_Of (Defining_Identifier (Formal), Loc))); |
8a49a499 | 2232 | |
d0dd5209 | 2233 | -- No special management required for this actual |
758c442c | 2234 | |
d0dd5209 JM |
2235 | else |
2236 | Append_To (Actuals, | |
e4494292 | 2237 | New_Occurrence_Of (Defining_Identifier (Formal), Loc)); |
d0dd5209 JM |
2238 | end if; |
2239 | ||
2240 | Next_Formal (Target_Formal); | |
758c442c GD |
2241 | Next (Formal); |
2242 | end loop; | |
2243 | ||
2287a75d | 2244 | Thunk_Id := Make_Temporary (Loc, 'T'); |
3af132b8 TQ |
2245 | |
2246 | -- Note: any change to this symbol name needs to be coordinated | |
2247 | -- with GNATcoverage, as that tool relies on it to identify | |
2248 | -- thunks and exclude them from source coverage analysis. | |
2249 | ||
da1c23dd | 2250 | Set_Ekind (Thunk_Id, Ekind (Prim)); |
6e818918 | 2251 | Set_Is_Thunk (Thunk_Id); |
28dd0055 | 2252 | Set_Convention (Thunk_Id, Convention (Prim)); |
d58008d2 | 2253 | Set_Needs_Debug_Info (Thunk_Id, Needs_Debug_Info (Target)); |
e2441021 | 2254 | Set_Thunk_Entity (Thunk_Id, Target); |
6e818918 | 2255 | |
95cb33a5 AC |
2256 | -- Procedure case |
2257 | ||
10b93b2e | 2258 | if Ekind (Target) = E_Procedure then |
d0dd5209 | 2259 | Thunk_Code := |
758c442c GD |
2260 | Make_Subprogram_Body (Loc, |
2261 | Specification => | |
2262 | Make_Procedure_Specification (Loc, | |
2263 | Defining_Unit_Name => Thunk_Id, | |
2264 | Parameter_Specifications => Formals), | |
2265 | Declarations => Decl, | |
2266 | Handled_Statement_Sequence => | |
2267 | Make_Handled_Sequence_Of_Statements (Loc, | |
2268 | Statements => New_List ( | |
2269 | Make_Procedure_Call_Statement (Loc, | |
d0dd5209 JM |
2270 | Name => New_Occurrence_Of (Target, Loc), |
2271 | Parameter_Associations => Actuals)))); | |
758c442c | 2272 | |
95cb33a5 | 2273 | -- Function case |
758c442c | 2274 | |
95cb33a5 | 2275 | else pragma Assert (Ekind (Target) = E_Function); |
f6f4d8d4 JM |
2276 | declare |
2277 | Result_Def : Node_Id; | |
2278 | Call_Node : Node_Id; | |
2279 | ||
2280 | begin | |
2281 | Call_Node := | |
2282 | Make_Function_Call (Loc, | |
2283 | Name => New_Occurrence_Of (Target, Loc), | |
2284 | Parameter_Associations => Actuals); | |
2285 | ||
2286 | if not Is_Interface (Etype (Prim)) then | |
2287 | Result_Def := New_Copy (Result_Definition (Parent (Target))); | |
2288 | ||
2289 | -- Thunk of function returning a class-wide interface object. No | |
2290 | -- extra displacement needed since the displacement is generated | |
2291 | -- in the return statement of Prim. Example: | |
2292 | ||
2293 | -- type Iface is interface ... | |
2294 | -- function F (O : Iface) return Iface'Class; | |
2295 | ||
2296 | -- type T is new ... and Iface with ... | |
2297 | -- function F (O : T) return Iface'Class; | |
2298 | ||
2299 | elsif Is_Class_Wide_Type (Etype (Prim)) then | |
2300 | Result_Def := New_Occurrence_Of (Etype (Prim), Loc); | |
2301 | ||
2302 | -- Thunk of function returning an interface object. Displacement | |
2303 | -- needed. Example: | |
2304 | ||
2305 | -- type Iface is interface ... | |
2306 | -- function F (O : Iface) return Iface; | |
2307 | ||
2308 | -- type T is new ... and Iface with ... | |
2309 | -- function F (O : T) return T; | |
2310 | ||
2311 | else | |
2312 | Result_Def := | |
2313 | New_Occurrence_Of (Class_Wide_Type (Etype (Prim)), Loc); | |
2314 | ||
2315 | -- Adding implicit conversion to force the displacement of | |
2316 | -- the pointer to the object to reference the corresponding | |
2317 | -- secondary dispatch table. | |
2318 | ||
2319 | Call_Node := | |
2320 | Make_Type_Conversion (Loc, | |
2321 | Subtype_Mark => | |
2322 | New_Occurrence_Of (Class_Wide_Type (Etype (Prim)), Loc), | |
2323 | Expression => Relocate_Node (Call_Node)); | |
2324 | end if; | |
2325 | ||
2326 | Thunk_Code := | |
2327 | Make_Subprogram_Body (Loc, | |
6782b1ef | 2328 | Specification => |
f6f4d8d4 JM |
2329 | Make_Function_Specification (Loc, |
2330 | Defining_Unit_Name => Thunk_Id, | |
2331 | Parameter_Specifications => Formals, | |
2332 | Result_Definition => Result_Def), | |
6782b1ef | 2333 | Declarations => Decl, |
f6f4d8d4 JM |
2334 | Handled_Statement_Sequence => |
2335 | Make_Handled_Sequence_Of_Statements (Loc, | |
2336 | Statements => New_List ( | |
2337 | Make_Simple_Return_Statement (Loc, Call_Node)))); | |
2338 | end; | |
758c442c | 2339 | end if; |
758c442c GD |
2340 | end Expand_Interface_Thunk; |
2341 | ||
cefce34c JM |
2342 | -------------------------- |
2343 | -- Has_CPP_Constructors -- | |
2344 | -------------------------- | |
2345 | ||
2346 | function Has_CPP_Constructors (Typ : Entity_Id) return Boolean is | |
2347 | E : Entity_Id; | |
2348 | ||
2349 | begin | |
2350 | -- Look for the constructor entities | |
2351 | ||
2352 | E := Next_Entity (Typ); | |
2353 | while Present (E) loop | |
6782b1ef | 2354 | if Ekind (E) = E_Function and then Is_Constructor (E) then |
cefce34c JM |
2355 | return True; |
2356 | end if; | |
2357 | ||
2358 | Next_Entity (E); | |
2359 | end loop; | |
2360 | ||
2361 | return False; | |
2362 | end Has_CPP_Constructors; | |
2363 | ||
e18d6a15 JM |
2364 | ------------ |
2365 | -- Has_DT -- | |
2366 | ------------ | |
2367 | ||
2368 | function Has_DT (Typ : Entity_Id) return Boolean is | |
2369 | begin | |
2370 | return not Is_Interface (Typ) | |
6782b1ef | 2371 | and then not Restriction_Active (No_Dispatching_Calls); |
e18d6a15 JM |
2372 | end Has_DT; |
2373 | ||
7af1cf83 AC |
2374 | ---------------------------------- |
2375 | -- Is_Expanded_Dispatching_Call -- | |
2376 | ---------------------------------- | |
2377 | ||
2378 | function Is_Expanded_Dispatching_Call (N : Node_Id) return Boolean is | |
2379 | begin | |
2380 | return Nkind (N) in N_Subprogram_Call | |
2381 | and then Nkind (Name (N)) = N_Explicit_Dereference | |
2382 | and then Is_Dispatch_Table_Entity (Etype (Name (N))); | |
2383 | end Is_Expanded_Dispatching_Call; | |
2384 | ||
bfef8d0d JM |
2385 | ------------------------------------- |
2386 | -- Is_Predefined_Dispatching_Alias -- | |
2387 | ------------------------------------- | |
2388 | ||
2389 | function Is_Predefined_Dispatching_Alias (Prim : Entity_Id) return Boolean | |
2390 | is | |
bfef8d0d | 2391 | begin |
b81a5940 | 2392 | return not Is_Predefined_Dispatching_Operation (Prim) |
bfef8d0d | 2393 | and then Present (Alias (Prim)) |
b81a5940 | 2394 | and then Is_Predefined_Dispatching_Operation (Ultimate_Alias (Prim)); |
bfef8d0d JM |
2395 | end Is_Predefined_Dispatching_Alias; |
2396 | ||
f4d379b8 HK |
2397 | ---------------------------------------- |
2398 | -- Make_Disp_Asynchronous_Select_Body -- | |
2399 | ---------------------------------------- | |
70482933 | 2400 | |
80b992ae HK |
2401 | -- For interface types, generate: |
2402 | ||
2403 | -- procedure _Disp_Asynchronous_Select | |
2404 | -- (T : in out <Typ>; | |
2405 | -- S : Integer; | |
2406 | -- P : System.Address; | |
2407 | -- B : out System.Storage_Elements.Dummy_Communication_Block; | |
2408 | -- F : out Boolean) | |
2409 | -- is | |
2410 | -- begin | |
14848f57 AC |
2411 | -- F := False; |
2412 | -- C := Ada.Tags.POK_Function; | |
80b992ae HK |
2413 | -- end _Disp_Asynchronous_Select; |
2414 | ||
2415 | -- For protected types, generate: | |
2416 | ||
2417 | -- procedure _Disp_Asynchronous_Select | |
2418 | -- (T : in out <Typ>; | |
2419 | -- S : Integer; | |
2420 | -- P : System.Address; | |
2421 | -- B : out System.Storage_Elements.Dummy_Communication_Block; | |
2422 | -- F : out Boolean) | |
2423 | -- is | |
2424 | -- I : Integer := | |
2425 | -- Ada.Tags.Get_Entry_Index (Ada.Tags.Tag (<Typ>VP, S)); | |
2426 | -- Bnn : System.Tasking.Protected_Objects.Operations. | |
2427 | -- Communication_Block; | |
2428 | -- begin | |
2429 | -- System.Tasking.Protected_Objects.Operations.Protected_Entry_Call | |
2430 | -- (T._object'Access, | |
2431 | -- System.Tasking.Protected_Objects.Protected_Entry_Index (I), | |
2432 | -- P, | |
2433 | -- System.Tasking.Asynchronous_Call, | |
2434 | -- Bnn); | |
2435 | -- B := System.Storage_Elements.Dummy_Communication_Block (Bnn); | |
2436 | -- end _Disp_Asynchronous_Select; | |
2437 | ||
2438 | -- For task types, generate: | |
2439 | ||
2440 | -- procedure _Disp_Asynchronous_Select | |
2441 | -- (T : in out <Typ>; | |
2442 | -- S : Integer; | |
2443 | -- P : System.Address; | |
2444 | -- B : out System.Storage_Elements.Dummy_Communication_Block; | |
2445 | -- F : out Boolean) | |
2446 | -- is | |
2447 | -- I : Integer := | |
2448 | -- Ada.Tags.Get_Entry_Index (Ada.Tags.Tag (<Typ>VP, S)); | |
2449 | -- begin | |
2450 | -- System.Tasking.Rendezvous.Task_Entry_Call | |
2451 | -- (T._task_id, | |
2452 | -- System.Tasking.Task_Entry_Index (I), | |
2453 | -- P, | |
2454 | -- System.Tasking.Asynchronous_Call, | |
2455 | -- F); | |
2456 | -- end _Disp_Asynchronous_Select; | |
2457 | ||
f4d379b8 HK |
2458 | function Make_Disp_Asynchronous_Select_Body |
2459 | (Typ : Entity_Id) return Node_Id | |
2460 | is | |
d0dd5209 JM |
2461 | Com_Block : Entity_Id; |
2462 | Conc_Typ : Entity_Id := Empty; | |
2463 | Decls : constant List_Id := New_List; | |
d0dd5209 | 2464 | Loc : constant Source_Ptr := Sloc (Typ); |
1923d2d6 | 2465 | Obj_Ref : Node_Id; |
d0dd5209 | 2466 | Stmts : constant List_Id := New_List; |
e8374e7a | 2467 | Tag_Node : Node_Id; |
70482933 RK |
2468 | |
2469 | begin | |
b0efe69e JM |
2470 | pragma Assert (not Restriction_Active (No_Dispatching_Calls)); |
2471 | ||
4d744221 JM |
2472 | -- Null body is generated for interface types |
2473 | ||
f4d379b8 HK |
2474 | if Is_Interface (Typ) then |
2475 | return | |
2476 | Make_Subprogram_Body (Loc, | |
6782b1ef AC |
2477 | Specification => |
2478 | Make_Disp_Asynchronous_Select_Spec (Typ), | |
2479 | Declarations => New_List, | |
f4d379b8 HK |
2480 | Handled_Statement_Sequence => |
2481 | Make_Handled_Sequence_Of_Statements (Loc, | |
6782b1ef AC |
2482 | New_List ( |
2483 | Make_Assignment_Statement (Loc, | |
2484 | Name => Make_Identifier (Loc, Name_uF), | |
2485 | Expression => New_Occurrence_Of (Standard_False, Loc))))); | |
fbf5a39b AC |
2486 | end if; |
2487 | ||
4d744221 JM |
2488 | if Is_Concurrent_Record_Type (Typ) then |
2489 | Conc_Typ := Corresponding_Concurrent_Type (Typ); | |
758c442c | 2490 | |
f4d379b8 | 2491 | -- Generate: |
80b992ae HK |
2492 | -- I : Integer := |
2493 | -- Ada.Tags.Get_Entry_Index (Ada.Tags.Tag! (<type>VP), S); | |
758c442c | 2494 | |
f4d379b8 HK |
2495 | -- where I will be used to capture the entry index of the primitive |
2496 | -- wrapper at position S. | |
758c442c | 2497 | |
e8374e7a AC |
2498 | if Tagged_Type_Expansion then |
2499 | Tag_Node := | |
2500 | Unchecked_Convert_To (RTE (RE_Tag), | |
e4494292 | 2501 | New_Occurrence_Of |
e8374e7a AC |
2502 | (Node (First_Elmt (Access_Disp_Table (Typ))), Loc)); |
2503 | else | |
2504 | Tag_Node := | |
2505 | Make_Attribute_Reference (Loc, | |
6782b1ef | 2506 | Prefix => New_Occurrence_Of (Typ, Loc), |
e8374e7a AC |
2507 | Attribute_Name => Name_Tag); |
2508 | end if; | |
2509 | ||
f4d379b8 HK |
2510 | Append_To (Decls, |
2511 | Make_Object_Declaration (Loc, | |
2512 | Defining_Identifier => | |
2513 | Make_Defining_Identifier (Loc, Name_uI), | |
6782b1ef | 2514 | Object_Definition => |
e4494292 | 2515 | New_Occurrence_Of (Standard_Integer, Loc), |
6782b1ef | 2516 | Expression => |
d0dd5209 | 2517 | Make_Function_Call (Loc, |
6782b1ef | 2518 | Name => |
e4494292 | 2519 | New_Occurrence_Of (RTE (RE_Get_Entry_Index), Loc), |
80b992ae | 2520 | Parameter_Associations => |
6782b1ef | 2521 | New_List (Tag_Node, Make_Identifier (Loc, Name_uS))))); |
758c442c | 2522 | |
f4d379b8 | 2523 | if Ekind (Conc_Typ) = E_Protected_Type then |
758c442c | 2524 | |
d0dd5209 | 2525 | -- Generate: |
80b992ae | 2526 | -- Bnn : Communication_Block; |
d0dd5209 | 2527 | |
2287a75d | 2528 | Com_Block := Make_Temporary (Loc, 'B'); |
d0dd5209 JM |
2529 | Append_To (Decls, |
2530 | Make_Object_Declaration (Loc, | |
6782b1ef AC |
2531 | Defining_Identifier => Com_Block, |
2532 | Object_Definition => | |
e4494292 | 2533 | New_Occurrence_Of (RTE (RE_Communication_Block), Loc))); |
d0dd5209 | 2534 | |
1923d2d6 | 2535 | -- Build T._object'Access for calls below |
758c442c | 2536 | |
1923d2d6 JM |
2537 | Obj_Ref := |
2538 | Make_Attribute_Reference (Loc, | |
2539 | Attribute_Name => Name_Unchecked_Access, | |
2540 | Prefix => | |
2541 | Make_Selected_Component (Loc, | |
2542 | Prefix => Make_Identifier (Loc, Name_uT), | |
2543 | Selector_Name => Make_Identifier (Loc, Name_uObject))); | |
758c442c | 2544 | |
1923d2d6 JM |
2545 | case Corresponding_Runtime_Package (Conc_Typ) is |
2546 | when System_Tasking_Protected_Objects_Entries => | |
758c442c | 2547 | |
1923d2d6 JM |
2548 | -- Generate: |
2549 | -- Protected_Entry_Call | |
2550 | -- (T._object'Access, -- Object | |
2551 | -- Protected_Entry_Index! (I), -- E | |
2552 | -- P, -- Uninterpreted_Data | |
2553 | -- Asynchronous_Call, -- Mode | |
2554 | -- Bnn); -- Communication_Block | |
2555 | ||
2556 | -- where T is the protected object, I is the entry index, P | |
2557 | -- is the wrapped parameters and B is the name of the | |
2558 | -- communication block. | |
2559 | ||
2560 | Append_To (Stmts, | |
2561 | Make_Procedure_Call_Statement (Loc, | |
6782b1ef | 2562 | Name => |
e4494292 | 2563 | New_Occurrence_Of (RTE (RE_Protected_Entry_Call), Loc), |
1923d2d6 JM |
2564 | Parameter_Associations => |
2565 | New_List ( | |
2566 | Obj_Ref, | |
758c442c | 2567 | |
1923d2d6 JM |
2568 | Make_Unchecked_Type_Conversion (Loc, -- entry index |
2569 | Subtype_Mark => | |
e4494292 | 2570 | New_Occurrence_Of |
7675ad4f | 2571 | (RTE (RE_Protected_Entry_Index), Loc), |
1923d2d6 | 2572 | Expression => Make_Identifier (Loc, Name_uI)), |
10b93b2e | 2573 | |
1923d2d6 | 2574 | Make_Identifier (Loc, Name_uP), -- parameter block |
e4494292 | 2575 | New_Occurrence_Of -- Asynchronous_Call |
7675ad4f | 2576 | (RTE (RE_Asynchronous_Call), Loc), |
e4494292 RD |
2577 | New_Occurrence_Of -- comm block |
2578 | (Com_Block, Loc)))); | |
1923d2d6 | 2579 | |
1923d2d6 JM |
2580 | when others => |
2581 | raise Program_Error; | |
2582 | end case; | |
d0dd5209 JM |
2583 | |
2584 | -- Generate: | |
80b992ae | 2585 | -- B := Dummy_Communication_Block (Bnn); |
d0dd5209 JM |
2586 | |
2587 | Append_To (Stmts, | |
2588 | Make_Assignment_Statement (Loc, | |
7675ad4f | 2589 | Name => Make_Identifier (Loc, Name_uB), |
d0dd5209 JM |
2590 | Expression => |
2591 | Make_Unchecked_Type_Conversion (Loc, | |
2592 | Subtype_Mark => | |
6782b1ef AC |
2593 | New_Occurrence_Of |
2594 | (RTE (RE_Dummy_Communication_Block), Loc), | |
2595 | Expression => New_Occurrence_Of (Com_Block, Loc)))); | |
d0dd5209 | 2596 | |
14848f57 AC |
2597 | -- Generate: |
2598 | -- F := False; | |
2599 | ||
2600 | Append_To (Stmts, | |
2601 | Make_Assignment_Statement (Loc, | |
833eaa8a | 2602 | Name => Make_Identifier (Loc, Name_uF), |
e4494292 | 2603 | Expression => New_Occurrence_Of (Standard_False, Loc))); |
14848f57 | 2604 | |
f4d379b8 HK |
2605 | else |
2606 | pragma Assert (Ekind (Conc_Typ) = E_Task_Type); | |
10b93b2e | 2607 | |
f4d379b8 | 2608 | -- Generate: |
80b992ae HK |
2609 | -- Task_Entry_Call |
2610 | -- (T._task_id, -- Acceptor | |
2611 | -- Task_Entry_Index! (I), -- E | |
2612 | -- P, -- Uninterpreted_Data | |
2613 | -- Asynchronous_Call, -- Mode | |
2614 | -- F); -- Rendezvous_Successful | |
70482933 | 2615 | |
1923d2d6 | 2616 | -- where T is the task object, I is the entry index, P is the |
f4d379b8 | 2617 | -- wrapped parameters and F is the status flag. |
70482933 | 2618 | |
f4d379b8 HK |
2619 | Append_To (Stmts, |
2620 | Make_Procedure_Call_Statement (Loc, | |
6782b1ef | 2621 | Name => |
e4494292 | 2622 | New_Occurrence_Of (RTE (RE_Task_Entry_Call), Loc), |
f4d379b8 HK |
2623 | Parameter_Associations => |
2624 | New_List ( | |
f4d379b8 | 2625 | Make_Selected_Component (Loc, -- T._task_id |
7675ad4f AC |
2626 | Prefix => Make_Identifier (Loc, Name_uT), |
2627 | Selector_Name => Make_Identifier (Loc, Name_uTask_Id)), | |
70482933 | 2628 | |
f4d379b8 HK |
2629 | Make_Unchecked_Type_Conversion (Loc, -- entry index |
2630 | Subtype_Mark => | |
e4494292 | 2631 | New_Occurrence_Of (RTE (RE_Task_Entry_Index), Loc), |
6782b1ef | 2632 | Expression => Make_Identifier (Loc, Name_uI)), |
70482933 | 2633 | |
f4d379b8 | 2634 | Make_Identifier (Loc, Name_uP), -- parameter block |
e4494292 | 2635 | New_Occurrence_Of -- Asynchronous_Call |
7675ad4f | 2636 | (RTE (RE_Asynchronous_Call), Loc), |
f4d379b8 HK |
2637 | Make_Identifier (Loc, Name_uF)))); -- status flag |
2638 | end if; | |
f2abc637 AC |
2639 | |
2640 | else | |
2641 | -- Ensure that the statements list is non-empty | |
2642 | ||
14848f57 AC |
2643 | Append_To (Stmts, |
2644 | Make_Assignment_Statement (Loc, | |
833eaa8a | 2645 | Name => Make_Identifier (Loc, Name_uF), |
e4494292 | 2646 | Expression => New_Occurrence_Of (Standard_False, Loc))); |
f4d379b8 | 2647 | end if; |
70482933 | 2648 | |
f4d379b8 HK |
2649 | return |
2650 | Make_Subprogram_Body (Loc, | |
833eaa8a | 2651 | Specification => |
f4d379b8 | 2652 | Make_Disp_Asynchronous_Select_Spec (Typ), |
833eaa8a | 2653 | Declarations => Decls, |
f4d379b8 HK |
2654 | Handled_Statement_Sequence => |
2655 | Make_Handled_Sequence_Of_Statements (Loc, Stmts)); | |
2656 | end Make_Disp_Asynchronous_Select_Body; | |
70482933 | 2657 | |
f4d379b8 HK |
2658 | ---------------------------------------- |
2659 | -- Make_Disp_Asynchronous_Select_Spec -- | |
2660 | ---------------------------------------- | |
70482933 | 2661 | |
f4d379b8 HK |
2662 | function Make_Disp_Asynchronous_Select_Spec |
2663 | (Typ : Entity_Id) return Node_Id | |
2664 | is | |
2665 | Loc : constant Source_Ptr := Sloc (Typ); | |
c7862167 HK |
2666 | B_Id : constant Entity_Id := Make_Defining_Identifier (Loc, Name_uB); |
2667 | Def_Id : constant Entity_Id := | |
f4d379b8 HK |
2668 | Make_Defining_Identifier (Loc, |
2669 | Name_uDisp_Asynchronous_Select); | |
2670 | Params : constant List_Id := New_List; | |
70482933 | 2671 | |
f4d379b8 | 2672 | begin |
b0efe69e JM |
2673 | pragma Assert (not Restriction_Active (No_Dispatching_Calls)); |
2674 | ||
d0dd5209 JM |
2675 | -- T : in out Typ; -- Object parameter |
2676 | -- S : Integer; -- Primitive operation slot | |
2677 | -- P : Address; -- Wrapped parameters | |
2678 | -- B : out Dummy_Communication_Block; -- Communication block dummy | |
2679 | -- F : out Boolean; -- Status flag | |
70482933 | 2680 | |
865234bf | 2681 | -- The B parameter may be left uninitialized |
c7862167 | 2682 | |
865234bf EB |
2683 | Set_Warnings_Off (B_Id); |
2684 | ||
d0dd5209 JM |
2685 | Append_List_To (Params, New_List ( |
2686 | ||
2687 | Make_Parameter_Specification (Loc, | |
6782b1ef AC |
2688 | Defining_Identifier => Make_Defining_Identifier (Loc, Name_uT), |
2689 | Parameter_Type => New_Occurrence_Of (Typ, Loc), | |
2690 | In_Present => True, | |
2691 | Out_Present => True), | |
d0dd5209 JM |
2692 | |
2693 | Make_Parameter_Specification (Loc, | |
6782b1ef AC |
2694 | Defining_Identifier => Make_Defining_Identifier (Loc, Name_uS), |
2695 | Parameter_Type => New_Occurrence_Of (Standard_Integer, Loc)), | |
d0dd5209 JM |
2696 | |
2697 | Make_Parameter_Specification (Loc, | |
6782b1ef AC |
2698 | Defining_Identifier => Make_Defining_Identifier (Loc, Name_uP), |
2699 | Parameter_Type => New_Occurrence_Of (RTE (RE_Address), Loc)), | |
d0dd5209 JM |
2700 | |
2701 | Make_Parameter_Specification (Loc, | |
865234bf | 2702 | Defining_Identifier => B_Id, |
6782b1ef | 2703 | Parameter_Type => |
e4494292 | 2704 | New_Occurrence_Of (RTE (RE_Dummy_Communication_Block), Loc), |
6782b1ef | 2705 | Out_Present => True), |
70482933 | 2706 | |
d0dd5209 | 2707 | Make_Parameter_Specification (Loc, |
6782b1ef AC |
2708 | Defining_Identifier => Make_Defining_Identifier (Loc, Name_uF), |
2709 | Parameter_Type => New_Occurrence_Of (Standard_Boolean, Loc), | |
2710 | Out_Present => True))); | |
82c80734 | 2711 | |
f4d379b8 | 2712 | return |
d0dd5209 JM |
2713 | Make_Procedure_Specification (Loc, |
2714 | Defining_Unit_Name => Def_Id, | |
2715 | Parameter_Specifications => Params); | |
f4d379b8 | 2716 | end Make_Disp_Asynchronous_Select_Spec; |
70482933 | 2717 | |
f4d379b8 HK |
2718 | --------------------------------------- |
2719 | -- Make_Disp_Conditional_Select_Body -- | |
2720 | --------------------------------------- | |
70482933 | 2721 | |
80b992ae HK |
2722 | -- For interface types, generate: |
2723 | ||
2724 | -- procedure _Disp_Conditional_Select | |
2725 | -- (T : in out <Typ>; | |
2726 | -- S : Integer; | |
2727 | -- P : System.Address; | |
2728 | -- C : out Ada.Tags.Prim_Op_Kind; | |
2729 | -- F : out Boolean) | |
2730 | -- is | |
2731 | -- begin | |
14848f57 AC |
2732 | -- F := False; |
2733 | -- C := Ada.Tags.POK_Function; | |
80b992ae HK |
2734 | -- end _Disp_Conditional_Select; |
2735 | ||
2736 | -- For protected types, generate: | |
2737 | ||
2738 | -- procedure _Disp_Conditional_Select | |
2739 | -- (T : in out <Typ>; | |
2740 | -- S : Integer; | |
2741 | -- P : System.Address; | |
2742 | -- C : out Ada.Tags.Prim_Op_Kind; | |
2743 | -- F : out Boolean) | |
2744 | -- is | |
2745 | -- I : Integer; | |
2746 | -- Bnn : System.Tasking.Protected_Objects.Operations. | |
2747 | -- Communication_Block; | |
2748 | ||
2749 | -- begin | |
2750 | -- C := Ada.Tags.Get_Prim_Op_Kind (Ada.Tags.Tag (<Typ>VP, S)); | |
2751 | ||
2752 | -- if C = Ada.Tags.POK_Procedure | |
2753 | -- or else C = Ada.Tags.POK_Protected_Procedure | |
2754 | -- or else C = Ada.Tags.POK_Task_Procedure | |
2755 | -- then | |
2756 | -- F := True; | |
2757 | -- return; | |
2758 | -- end if; | |
2759 | ||
2760 | -- I := Ada.Tags.Get_Entry_Index (Ada.Tags.Tag (<Typ>VP, S)); | |
2761 | -- System.Tasking.Protected_Objects.Operations.Protected_Entry_Call | |
2762 | -- (T.object'Access, | |
2763 | -- System.Tasking.Protected_Objects.Protected_Entry_Index (I), | |
2764 | -- P, | |
2765 | -- System.Tasking.Conditional_Call, | |
2766 | -- Bnn); | |
2767 | -- F := not Cancelled (Bnn); | |
2768 | -- end _Disp_Conditional_Select; | |
2769 | ||
2770 | -- For task types, generate: | |
2771 | ||
2772 | -- procedure _Disp_Conditional_Select | |
2773 | -- (T : in out <Typ>; | |
2774 | -- S : Integer; | |
2775 | -- P : System.Address; | |
2776 | -- C : out Ada.Tags.Prim_Op_Kind; | |
2777 | -- F : out Boolean) | |
2778 | -- is | |
2779 | -- I : Integer; | |
2780 | ||
2781 | -- begin | |
2782 | -- I := Ada.Tags.Get_Entry_Index (Ada.Tags.Tag (<Typ>VP, S)); | |
2783 | -- System.Tasking.Rendezvous.Task_Entry_Call | |
2784 | -- (T._task_id, | |
2785 | -- System.Tasking.Task_Entry_Index (I), | |
2786 | -- P, | |
2787 | -- System.Tasking.Conditional_Call, | |
2788 | -- F); | |
2789 | -- end _Disp_Conditional_Select; | |
2790 | ||
f4d379b8 HK |
2791 | function Make_Disp_Conditional_Select_Body |
2792 | (Typ : Entity_Id) return Node_Id | |
2793 | is | |
2794 | Loc : constant Source_Ptr := Sloc (Typ); | |
2795 | Blk_Nam : Entity_Id; | |
2796 | Conc_Typ : Entity_Id := Empty; | |
2797 | Decls : constant List_Id := New_List; | |
1923d2d6 | 2798 | Obj_Ref : Node_Id; |
f4d379b8 | 2799 | Stmts : constant List_Id := New_List; |
e8374e7a | 2800 | Tag_Node : Node_Id; |
70482933 | 2801 | |
f4d379b8 | 2802 | begin |
b0efe69e JM |
2803 | pragma Assert (not Restriction_Active (No_Dispatching_Calls)); |
2804 | ||
4d744221 JM |
2805 | -- Null body is generated for interface types |
2806 | ||
f4d379b8 HK |
2807 | if Is_Interface (Typ) then |
2808 | return | |
2809 | Make_Subprogram_Body (Loc, | |
6782b1ef | 2810 | Specification => |
f4d379b8 | 2811 | Make_Disp_Conditional_Select_Spec (Typ), |
6782b1ef | 2812 | Declarations => No_List, |
f4d379b8 HK |
2813 | Handled_Statement_Sequence => |
2814 | Make_Handled_Sequence_Of_Statements (Loc, | |
14848f57 | 2815 | New_List (Make_Assignment_Statement (Loc, |
833eaa8a | 2816 | Name => Make_Identifier (Loc, Name_uF), |
e4494292 | 2817 | Expression => New_Occurrence_Of (Standard_False, Loc))))); |
f4d379b8 | 2818 | end if; |
70482933 | 2819 | |
4d744221 JM |
2820 | if Is_Concurrent_Record_Type (Typ) then |
2821 | Conc_Typ := Corresponding_Concurrent_Type (Typ); | |
70482933 | 2822 | |
f4d379b8 HK |
2823 | -- Generate: |
2824 | -- I : Integer; | |
70482933 | 2825 | |
f4d379b8 HK |
2826 | -- where I will be used to capture the entry index of the primitive |
2827 | -- wrapper at position S. | |
70482933 | 2828 | |
f4d379b8 HK |
2829 | Append_To (Decls, |
2830 | Make_Object_Declaration (Loc, | |
6782b1ef AC |
2831 | Defining_Identifier => Make_Defining_Identifier (Loc, Name_uI), |
2832 | Object_Definition => | |
e4494292 | 2833 | New_Occurrence_Of (Standard_Integer, Loc))); |
70482933 | 2834 | |
4d744221 | 2835 | -- Generate: |
80b992ae | 2836 | -- C := Ada.Tags.Get_Prim_Op_Kind (Ada.Tags.Tag! (<type>VP), S); |
70482933 | 2837 | |
4d744221 JM |
2838 | -- if C = POK_Procedure |
2839 | -- or else C = POK_Protected_Procedure | |
2840 | -- or else C = POK_Task_Procedure; | |
2841 | -- then | |
2842 | -- F := True; | |
2843 | -- return; | |
2844 | -- end if; | |
758c442c | 2845 | |
1138cf59 | 2846 | Build_Common_Dispatching_Select_Statements (Typ, Stmts); |
758c442c | 2847 | |
f4d379b8 HK |
2848 | -- Generate: |
2849 | -- Bnn : Communication_Block; | |
758c442c | 2850 | |
80b992ae HK |
2851 | -- where Bnn is the name of the communication block used in the |
2852 | -- call to Protected_Entry_Call. | |
758c442c | 2853 | |
2287a75d | 2854 | Blk_Nam := Make_Temporary (Loc, 'B'); |
f4d379b8 HK |
2855 | Append_To (Decls, |
2856 | Make_Object_Declaration (Loc, | |
6782b1ef AC |
2857 | Defining_Identifier => Blk_Nam, |
2858 | Object_Definition => | |
e4494292 | 2859 | New_Occurrence_Of (RTE (RE_Communication_Block), Loc))); |
758c442c | 2860 | |
f4d379b8 | 2861 | -- Generate: |
80b992ae | 2862 | -- I := Ada.Tags.Get_Entry_Index (Ada.Tags.Tag! (<type>VP), S); |
758c442c | 2863 | |
f4d379b8 | 2864 | -- I is the entry index and S is the dispatch table slot |
758c442c | 2865 | |
e8374e7a AC |
2866 | if Tagged_Type_Expansion then |
2867 | Tag_Node := | |
2868 | Unchecked_Convert_To (RTE (RE_Tag), | |
e4494292 | 2869 | New_Occurrence_Of |
e8374e7a AC |
2870 | (Node (First_Elmt (Access_Disp_Table (Typ))), Loc)); |
2871 | ||
2872 | else | |
2873 | Tag_Node := | |
2874 | Make_Attribute_Reference (Loc, | |
6782b1ef | 2875 | Prefix => New_Occurrence_Of (Typ, Loc), |
e8374e7a AC |
2876 | Attribute_Name => Name_Tag); |
2877 | end if; | |
2878 | ||
f4d379b8 HK |
2879 | Append_To (Stmts, |
2880 | Make_Assignment_Statement (Loc, | |
6782b1ef | 2881 | Name => Make_Identifier (Loc, Name_uI), |
f4d379b8 | 2882 | Expression => |
d0dd5209 | 2883 | Make_Function_Call (Loc, |
6782b1ef | 2884 | Name => |
e4494292 | 2885 | New_Occurrence_Of (RTE (RE_Get_Entry_Index), Loc), |
6782b1ef AC |
2886 | Parameter_Associations => New_List ( |
2887 | Tag_Node, | |
2888 | Make_Identifier (Loc, Name_uS))))); | |
70482933 | 2889 | |
f4d379b8 | 2890 | if Ekind (Conc_Typ) = E_Protected_Type then |
70482933 | 2891 | |
1923d2d6 JM |
2892 | Obj_Ref := -- T._object'Access |
2893 | Make_Attribute_Reference (Loc, | |
2894 | Attribute_Name => Name_Unchecked_Access, | |
2895 | Prefix => | |
2896 | Make_Selected_Component (Loc, | |
2897 | Prefix => Make_Identifier (Loc, Name_uT), | |
2898 | Selector_Name => Make_Identifier (Loc, Name_uObject))); | |
70482933 | 2899 | |
1923d2d6 JM |
2900 | case Corresponding_Runtime_Package (Conc_Typ) is |
2901 | when System_Tasking_Protected_Objects_Entries => | |
2902 | -- Generate: | |
3ca505dc | 2903 | |
1923d2d6 JM |
2904 | -- Protected_Entry_Call |
2905 | -- (T._object'Access, -- Object | |
2906 | -- Protected_Entry_Index! (I), -- E | |
2907 | -- P, -- Uninterpreted_Data | |
2908 | -- Conditional_Call, -- Mode | |
2909 | -- Bnn); -- Block | |
3ca505dc | 2910 | |
1923d2d6 JM |
2911 | -- where T is the protected object, I is the entry index, P |
2912 | -- are the wrapped parameters and Bnn is the name of the | |
2913 | -- communication block. | |
10b93b2e | 2914 | |
1923d2d6 JM |
2915 | Append_To (Stmts, |
2916 | Make_Procedure_Call_Statement (Loc, | |
6782b1ef | 2917 | Name => |
e4494292 | 2918 | New_Occurrence_Of (RTE (RE_Protected_Entry_Call), Loc), |
6782b1ef | 2919 | Parameter_Associations => New_List ( |
1923d2d6 | 2920 | Obj_Ref, |
10b93b2e | 2921 | |
1923d2d6 JM |
2922 | Make_Unchecked_Type_Conversion (Loc, -- entry index |
2923 | Subtype_Mark => | |
e4494292 | 2924 | New_Occurrence_Of |
1923d2d6 JM |
2925 | (RTE (RE_Protected_Entry_Index), Loc), |
2926 | Expression => Make_Identifier (Loc, Name_uI)), | |
2927 | ||
2928 | Make_Identifier (Loc, Name_uP), -- parameter block | |
2929 | ||
e4494292 RD |
2930 | New_Occurrence_Of -- Conditional_Call |
2931 | (RTE (RE_Conditional_Call), Loc), | |
2932 | New_Occurrence_Of -- Bnn | |
2933 | (Blk_Nam, Loc)))); | |
1923d2d6 JM |
2934 | |
2935 | when System_Tasking_Protected_Objects_Single_Entry => | |
2936 | ||
2937 | -- If we are compiling for a restricted run-time, the call | |
2938 | -- uses the simpler form. | |
2939 | ||
2940 | Append_To (Stmts, | |
2941 | Make_Procedure_Call_Statement (Loc, | |
6782b1ef | 2942 | Name => |
e4494292 | 2943 | New_Occurrence_Of |
1923d2d6 | 2944 | (RTE (RE_Protected_Single_Entry_Call), Loc), |
6782b1ef | 2945 | Parameter_Associations => New_List ( |
1923d2d6 JM |
2946 | Obj_Ref, |
2947 | ||
2948 | Make_Attribute_Reference (Loc, | |
7675ad4f | 2949 | Prefix => Make_Identifier (Loc, Name_uP), |
1923d2d6 JM |
2950 | Attribute_Name => Name_Address), |
2951 | ||
e4494292 | 2952 | New_Occurrence_Of |
1923d2d6 JM |
2953 | (RTE (RE_Conditional_Call), Loc)))); |
2954 | when others => | |
2955 | raise Program_Error; | |
2956 | end case; | |
10b93b2e | 2957 | |
f4d379b8 HK |
2958 | -- Generate: |
2959 | -- F := not Cancelled (Bnn); | |
3ca505dc | 2960 | |
f4d379b8 | 2961 | -- where F is the success flag. The status of Cancelled is negated |
9c582551 | 2962 | -- in order to match the behavior of the version for task types. |
3ca505dc | 2963 | |
f4d379b8 HK |
2964 | Append_To (Stmts, |
2965 | Make_Assignment_Statement (Loc, | |
7675ad4f | 2966 | Name => Make_Identifier (Loc, Name_uF), |
f4d379b8 HK |
2967 | Expression => |
2968 | Make_Op_Not (Loc, | |
2969 | Right_Opnd => | |
2970 | Make_Function_Call (Loc, | |
6782b1ef | 2971 | Name => |
e4494292 | 2972 | New_Occurrence_Of (RTE (RE_Cancelled), Loc), |
6782b1ef | 2973 | Parameter_Associations => New_List ( |
e4494292 | 2974 | New_Occurrence_Of (Blk_Nam, Loc)))))); |
f4d379b8 HK |
2975 | else |
2976 | pragma Assert (Ekind (Conc_Typ) = E_Task_Type); | |
10b93b2e | 2977 | |
f4d379b8 | 2978 | -- Generate: |
80b992ae HK |
2979 | -- Task_Entry_Call |
2980 | -- (T._task_id, -- Acceptor | |
2981 | -- Task_Entry_Index! (I), -- E | |
2982 | -- P, -- Uninterpreted_Data | |
2983 | -- Conditional_Call, -- Mode | |
2984 | -- F); -- Rendezvous_Successful | |
10b93b2e | 2985 | |
f4d379b8 HK |
2986 | -- where T is the task object, I is the entry index, P are the |
2987 | -- wrapped parameters and F is the status flag. | |
3ca505dc | 2988 | |
f4d379b8 HK |
2989 | Append_To (Stmts, |
2990 | Make_Procedure_Call_Statement (Loc, | |
6782b1ef | 2991 | Name => |
e4494292 | 2992 | New_Occurrence_Of (RTE (RE_Task_Entry_Call), Loc), |
6782b1ef | 2993 | Parameter_Associations => New_List ( |
f4d379b8 HK |
2994 | |
2995 | Make_Selected_Component (Loc, -- T._task_id | |
7675ad4f AC |
2996 | Prefix => Make_Identifier (Loc, Name_uT), |
2997 | Selector_Name => Make_Identifier (Loc, Name_uTask_Id)), | |
f4d379b8 HK |
2998 | |
2999 | Make_Unchecked_Type_Conversion (Loc, -- entry index | |
3000 | Subtype_Mark => | |
e4494292 | 3001 | New_Occurrence_Of (RTE (RE_Task_Entry_Index), Loc), |
7675ad4f | 3002 | Expression => Make_Identifier (Loc, Name_uI)), |
f4d379b8 HK |
3003 | |
3004 | Make_Identifier (Loc, Name_uP), -- parameter block | |
e4494292 | 3005 | New_Occurrence_Of -- Conditional_Call |
7675ad4f | 3006 | (RTE (RE_Conditional_Call), Loc), |
f4d379b8 | 3007 | Make_Identifier (Loc, Name_uF)))); -- status flag |
10b93b2e | 3008 | end if; |
f2abc637 AC |
3009 | |
3010 | else | |
14848f57 | 3011 | -- Initialize out parameters |
f2abc637 | 3012 | |
14848f57 AC |
3013 | Append_To (Stmts, |
3014 | Make_Assignment_Statement (Loc, | |
833eaa8a | 3015 | Name => Make_Identifier (Loc, Name_uF), |
e4494292 | 3016 | Expression => New_Occurrence_Of (Standard_False, Loc))); |
14848f57 AC |
3017 | Append_To (Stmts, |
3018 | Make_Assignment_Statement (Loc, | |
833eaa8a | 3019 | Name => Make_Identifier (Loc, Name_uC), |
e4494292 | 3020 | Expression => New_Occurrence_Of (RTE (RE_POK_Function), Loc))); |
f4d379b8 HK |
3021 | end if; |
3022 | ||
3023 | return | |
3024 | Make_Subprogram_Body (Loc, | |
833eaa8a | 3025 | Specification => |
f4d379b8 | 3026 | Make_Disp_Conditional_Select_Spec (Typ), |
833eaa8a | 3027 | Declarations => Decls, |
f4d379b8 HK |
3028 | Handled_Statement_Sequence => |
3029 | Make_Handled_Sequence_Of_Statements (Loc, Stmts)); | |
3030 | end Make_Disp_Conditional_Select_Body; | |
3031 | ||
3032 | --------------------------------------- | |
3033 | -- Make_Disp_Conditional_Select_Spec -- | |
3034 | --------------------------------------- | |
3035 | ||
3036 | function Make_Disp_Conditional_Select_Spec | |
3037 | (Typ : Entity_Id) return Node_Id | |
3038 | is | |
3039 | Loc : constant Source_Ptr := Sloc (Typ); | |
3040 | Def_Id : constant Node_Id := | |
3041 | Make_Defining_Identifier (Loc, | |
3042 | Name_uDisp_Conditional_Select); | |
3043 | Params : constant List_Id := New_List; | |
3044 | ||
3045 | begin | |
b0efe69e JM |
3046 | pragma Assert (not Restriction_Active (No_Dispatching_Calls)); |
3047 | ||
d0dd5209 JM |
3048 | -- T : in out Typ; -- Object parameter |
3049 | -- S : Integer; -- Primitive operation slot | |
3050 | -- P : Address; -- Wrapped parameters | |
3051 | -- C : out Prim_Op_Kind; -- Call kind | |
3052 | -- F : out Boolean; -- Status flag | |
3053 | ||
3054 | Append_List_To (Params, New_List ( | |
3055 | ||
3056 | Make_Parameter_Specification (Loc, | |
6782b1ef AC |
3057 | Defining_Identifier => Make_Defining_Identifier (Loc, Name_uT), |
3058 | Parameter_Type => New_Occurrence_Of (Typ, Loc), | |
3059 | In_Present => True, | |
3060 | Out_Present => True), | |
d0dd5209 JM |
3061 | |
3062 | Make_Parameter_Specification (Loc, | |
6782b1ef AC |
3063 | Defining_Identifier => Make_Defining_Identifier (Loc, Name_uS), |
3064 | Parameter_Type => New_Occurrence_Of (Standard_Integer, Loc)), | |
d0dd5209 JM |
3065 | |
3066 | Make_Parameter_Specification (Loc, | |
6782b1ef AC |
3067 | Defining_Identifier => Make_Defining_Identifier (Loc, Name_uP), |
3068 | Parameter_Type => New_Occurrence_Of (RTE (RE_Address), Loc)), | |
f4d379b8 | 3069 | |
d0dd5209 | 3070 | Make_Parameter_Specification (Loc, |
6782b1ef AC |
3071 | Defining_Identifier => Make_Defining_Identifier (Loc, Name_uC), |
3072 | Parameter_Type => | |
e4494292 | 3073 | New_Occurrence_Of (RTE (RE_Prim_Op_Kind), Loc), |
6782b1ef | 3074 | Out_Present => True), |
f4d379b8 | 3075 | |
d0dd5209 | 3076 | Make_Parameter_Specification (Loc, |
6782b1ef AC |
3077 | Defining_Identifier => Make_Defining_Identifier (Loc, Name_uF), |
3078 | Parameter_Type => New_Occurrence_Of (Standard_Boolean, Loc), | |
3079 | Out_Present => True))); | |
f4d379b8 HK |
3080 | |
3081 | return | |
3082 | Make_Procedure_Specification (Loc, | |
3083 | Defining_Unit_Name => Def_Id, | |
3084 | Parameter_Specifications => Params); | |
3085 | end Make_Disp_Conditional_Select_Spec; | |
3086 | ||
3087 | ------------------------------------- | |
3088 | -- Make_Disp_Get_Prim_Op_Kind_Body -- | |
3089 | ------------------------------------- | |
3090 | ||
6782b1ef | 3091 | function Make_Disp_Get_Prim_Op_Kind_Body (Typ : Entity_Id) return Node_Id is |
e8374e7a AC |
3092 | Loc : constant Source_Ptr := Sloc (Typ); |
3093 | Tag_Node : Node_Id; | |
f4d379b8 HK |
3094 | |
3095 | begin | |
b0efe69e JM |
3096 | pragma Assert (not Restriction_Active (No_Dispatching_Calls)); |
3097 | ||
f4d379b8 HK |
3098 | if Is_Interface (Typ) then |
3099 | return | |
3100 | Make_Subprogram_Body (Loc, | |
6782b1ef | 3101 | Specification => |
f4d379b8 | 3102 | Make_Disp_Get_Prim_Op_Kind_Spec (Typ), |
6782b1ef | 3103 | Declarations => New_List, |
f4d379b8 HK |
3104 | Handled_Statement_Sequence => |
3105 | Make_Handled_Sequence_Of_Statements (Loc, | |
3106 | New_List (Make_Null_Statement (Loc)))); | |
3ca505dc JM |
3107 | end if; |
3108 | ||
10b93b2e | 3109 | -- Generate: |
f4d379b8 | 3110 | -- C := get_prim_op_kind (tag! (<type>VP), S); |
70482933 | 3111 | |
f4d379b8 HK |
3112 | -- where C is the out parameter capturing the call kind and S is the |
3113 | -- dispatch table slot number. | |
70482933 | 3114 | |
e8374e7a AC |
3115 | if Tagged_Type_Expansion then |
3116 | Tag_Node := | |
3117 | Unchecked_Convert_To (RTE (RE_Tag), | |
e4494292 | 3118 | New_Occurrence_Of |
e8374e7a AC |
3119 | (Node (First_Elmt (Access_Disp_Table (Typ))), Loc)); |
3120 | ||
3121 | else | |
3122 | Tag_Node := | |
3123 | Make_Attribute_Reference (Loc, | |
6782b1ef | 3124 | Prefix => New_Occurrence_Of (Typ, Loc), |
e8374e7a AC |
3125 | Attribute_Name => Name_Tag); |
3126 | end if; | |
3127 | ||
f4d379b8 HK |
3128 | return |
3129 | Make_Subprogram_Body (Loc, | |
6782b1ef | 3130 | Specification => |
f4d379b8 | 3131 | Make_Disp_Get_Prim_Op_Kind_Spec (Typ), |
6782b1ef | 3132 | Declarations => New_List, |
f4d379b8 HK |
3133 | Handled_Statement_Sequence => |
3134 | Make_Handled_Sequence_Of_Statements (Loc, | |
3135 | New_List ( | |
3136 | Make_Assignment_Statement (Loc, | |
6782b1ef | 3137 | Name => Make_Identifier (Loc, Name_uC), |
f4d379b8 | 3138 | Expression => |
d0dd5209 JM |
3139 | Make_Function_Call (Loc, |
3140 | Name => | |
e4494292 | 3141 | New_Occurrence_Of (RTE (RE_Get_Prim_Op_Kind), Loc), |
d0dd5209 | 3142 | Parameter_Associations => New_List ( |
e8374e7a AC |
3143 | Tag_Node, |
3144 | Make_Identifier (Loc, Name_uS))))))); | |
f4d379b8 | 3145 | end Make_Disp_Get_Prim_Op_Kind_Body; |
3ca505dc | 3146 | |
f4d379b8 HK |
3147 | ------------------------------------- |
3148 | -- Make_Disp_Get_Prim_Op_Kind_Spec -- | |
3149 | ------------------------------------- | |
3ca505dc | 3150 | |
f4d379b8 HK |
3151 | function Make_Disp_Get_Prim_Op_Kind_Spec |
3152 | (Typ : Entity_Id) return Node_Id | |
3153 | is | |
3154 | Loc : constant Source_Ptr := Sloc (Typ); | |
3155 | Def_Id : constant Node_Id := | |
6782b1ef | 3156 | Make_Defining_Identifier (Loc, Name_uDisp_Get_Prim_Op_Kind); |
f4d379b8 | 3157 | Params : constant List_Id := New_List; |
3ca505dc | 3158 | |
f4d379b8 | 3159 | begin |
b0efe69e JM |
3160 | pragma Assert (not Restriction_Active (No_Dispatching_Calls)); |
3161 | ||
d0dd5209 JM |
3162 | -- T : in out Typ; -- Object parameter |
3163 | -- S : Integer; -- Primitive operation slot | |
3164 | -- C : out Prim_Op_Kind; -- Call kind | |
3165 | ||
3166 | Append_List_To (Params, New_List ( | |
3167 | ||
3168 | Make_Parameter_Specification (Loc, | |
6782b1ef AC |
3169 | Defining_Identifier => Make_Defining_Identifier (Loc, Name_uT), |
3170 | Parameter_Type => New_Occurrence_Of (Typ, Loc), | |
3171 | In_Present => True, | |
3172 | Out_Present => True), | |
70482933 | 3173 | |
d0dd5209 | 3174 | Make_Parameter_Specification (Loc, |
6782b1ef AC |
3175 | Defining_Identifier => Make_Defining_Identifier (Loc, Name_uS), |
3176 | Parameter_Type => New_Occurrence_Of (Standard_Integer, Loc)), | |
70482933 | 3177 | |
d0dd5209 | 3178 | Make_Parameter_Specification (Loc, |
6782b1ef AC |
3179 | Defining_Identifier => Make_Defining_Identifier (Loc, Name_uC), |
3180 | Parameter_Type => | |
e4494292 | 3181 | New_Occurrence_Of (RTE (RE_Prim_Op_Kind), Loc), |
6782b1ef | 3182 | Out_Present => True))); |
f4d379b8 HK |
3183 | |
3184 | return | |
3185 | Make_Procedure_Specification (Loc, | |
3186 | Defining_Unit_Name => Def_Id, | |
3187 | Parameter_Specifications => Params); | |
3188 | end Make_Disp_Get_Prim_Op_Kind_Spec; | |
3189 | ||
3190 | -------------------------------- | |
3191 | -- Make_Disp_Get_Task_Id_Body -- | |
3192 | -------------------------------- | |
3193 | ||
3194 | function Make_Disp_Get_Task_Id_Body | |
3195 | (Typ : Entity_Id) return Node_Id | |
3196 | is | |
3197 | Loc : constant Source_Ptr := Sloc (Typ); | |
3198 | Ret : Node_Id; | |
3199 | ||
3200 | begin | |
b0efe69e JM |
3201 | pragma Assert (not Restriction_Active (No_Dispatching_Calls)); |
3202 | ||
f4d379b8 HK |
3203 | if Is_Concurrent_Record_Type (Typ) |
3204 | and then Ekind (Corresponding_Concurrent_Type (Typ)) = E_Task_Type | |
3205 | then | |
d0dd5209 JM |
3206 | -- Generate: |
3207 | -- return To_Address (_T._task_id); | |
3208 | ||
f4d379b8 | 3209 | Ret := |
b2e1beb3 | 3210 | Make_Simple_Return_Statement (Loc, |
f4d379b8 | 3211 | Expression => |
d0dd5209 | 3212 | Make_Unchecked_Type_Conversion (Loc, |
6782b1ef AC |
3213 | Subtype_Mark => New_Occurrence_Of (RTE (RE_Address), Loc), |
3214 | Expression => | |
d0dd5209 | 3215 | Make_Selected_Component (Loc, |
7675ad4f AC |
3216 | Prefix => Make_Identifier (Loc, Name_uT), |
3217 | Selector_Name => Make_Identifier (Loc, Name_uTask_Id)))); | |
f4d379b8 HK |
3218 | |
3219 | -- A null body is constructed for non-task types | |
3220 | ||
3221 | else | |
d0dd5209 JM |
3222 | -- Generate: |
3223 | -- return Null_Address; | |
3224 | ||
f4d379b8 | 3225 | Ret := |
b2e1beb3 | 3226 | Make_Simple_Return_Statement (Loc, |
6782b1ef | 3227 | Expression => New_Occurrence_Of (RTE (RE_Null_Address), Loc)); |
f4d379b8 HK |
3228 | end if; |
3229 | ||
3230 | return | |
3231 | Make_Subprogram_Body (Loc, | |
6782b1ef AC |
3232 | Specification => Make_Disp_Get_Task_Id_Spec (Typ), |
3233 | Declarations => New_List, | |
f4d379b8 | 3234 | Handled_Statement_Sequence => |
6782b1ef | 3235 | Make_Handled_Sequence_Of_Statements (Loc, New_List (Ret))); |
f4d379b8 HK |
3236 | end Make_Disp_Get_Task_Id_Body; |
3237 | ||
3238 | -------------------------------- | |
3239 | -- Make_Disp_Get_Task_Id_Spec -- | |
3240 | -------------------------------- | |
3241 | ||
3242 | function Make_Disp_Get_Task_Id_Spec | |
3243 | (Typ : Entity_Id) return Node_Id | |
3244 | is | |
d0dd5209 | 3245 | Loc : constant Source_Ptr := Sloc (Typ); |
f4d379b8 HK |
3246 | |
3247 | begin | |
b0efe69e JM |
3248 | pragma Assert (not Restriction_Active (No_Dispatching_Calls)); |
3249 | ||
f4d379b8 HK |
3250 | return |
3251 | Make_Function_Specification (Loc, | |
6782b1ef | 3252 | Defining_Unit_Name => |
d0dd5209 | 3253 | Make_Defining_Identifier (Loc, Name_uDisp_Get_Task_Id), |
f4d379b8 HK |
3254 | Parameter_Specifications => New_List ( |
3255 | Make_Parameter_Specification (Loc, | |
6782b1ef AC |
3256 | Defining_Identifier => Make_Defining_Identifier (Loc, Name_uT), |
3257 | Parameter_Type => New_Occurrence_Of (Typ, Loc))), | |
3258 | Result_Definition => | |
e4494292 | 3259 | New_Occurrence_Of (RTE (RE_Address), Loc)); |
f4d379b8 HK |
3260 | end Make_Disp_Get_Task_Id_Spec; |
3261 | ||
80b992ae HK |
3262 | ---------------------------- |
3263 | -- Make_Disp_Requeue_Body -- | |
3264 | ---------------------------- | |
3265 | ||
3266 | function Make_Disp_Requeue_Body | |
3267 | (Typ : Entity_Id) return Node_Id | |
3268 | is | |
3269 | Loc : constant Source_Ptr := Sloc (Typ); | |
3270 | Conc_Typ : Entity_Id := Empty; | |
3271 | Stmts : constant List_Id := New_List; | |
3272 | ||
3273 | begin | |
3274 | pragma Assert (not Restriction_Active (No_Dispatching_Calls)); | |
3275 | ||
3276 | -- Null body is generated for interface types and non-concurrent | |
3277 | -- tagged types. | |
3278 | ||
3279 | if Is_Interface (Typ) | |
3280 | or else not Is_Concurrent_Record_Type (Typ) | |
3281 | then | |
3282 | return | |
3283 | Make_Subprogram_Body (Loc, | |
6782b1ef AC |
3284 | Specification => Make_Disp_Requeue_Spec (Typ), |
3285 | Declarations => No_List, | |
80b992ae HK |
3286 | Handled_Statement_Sequence => |
3287 | Make_Handled_Sequence_Of_Statements (Loc, | |
3288 | New_List (Make_Null_Statement (Loc)))); | |
3289 | end if; | |
3290 | ||
3291 | Conc_Typ := Corresponding_Concurrent_Type (Typ); | |
3292 | ||
3293 | if Ekind (Conc_Typ) = E_Protected_Type then | |
3294 | ||
3295 | -- Generate statements: | |
3296 | -- if F then | |
3297 | -- System.Tasking.Protected_Objects.Operations. | |
3298 | -- Requeue_Protected_Entry | |
3299 | -- (Protection_Entries_Access (P), | |
3300 | -- O._object'Unchecked_Access, | |
3301 | -- Protected_Entry_Index (I), | |
3302 | -- A); | |
3303 | -- else | |
3304 | -- System.Tasking.Protected_Objects.Operations. | |
3305 | -- Requeue_Task_To_Protected_Entry | |
3306 | -- (O._object'Unchecked_Access, | |
3307 | -- Protected_Entry_Index (I), | |
3308 | -- A); | |
3309 | -- end if; | |
3310 | ||
1923d2d6 JM |
3311 | if Restriction_Active (No_Entry_Queue) then |
3312 | Append_To (Stmts, Make_Null_Statement (Loc)); | |
3313 | else | |
3314 | Append_To (Stmts, | |
3315 | Make_If_Statement (Loc, | |
7675ad4f | 3316 | Condition => Make_Identifier (Loc, Name_uF), |
80b992ae | 3317 | |
1923d2d6 JM |
3318 | Then_Statements => |
3319 | New_List ( | |
80b992ae | 3320 | |
1923d2d6 | 3321 | -- Call to Requeue_Protected_Entry |
80b992ae | 3322 | |
1923d2d6 JM |
3323 | Make_Procedure_Call_Statement (Loc, |
3324 | Name => | |
6782b1ef AC |
3325 | New_Occurrence_Of |
3326 | (RTE (RE_Requeue_Protected_Entry), Loc), | |
1923d2d6 JM |
3327 | Parameter_Associations => |
3328 | New_List ( | |
3329 | ||
3330 | Make_Unchecked_Type_Conversion (Loc, -- PEA (P) | |
3331 | Subtype_Mark => | |
e4494292 | 3332 | New_Occurrence_Of ( |
1923d2d6 JM |
3333 | RTE (RE_Protection_Entries_Access), Loc), |
3334 | Expression => | |
3335 | Make_Identifier (Loc, Name_uP)), | |
3336 | ||
3337 | Make_Attribute_Reference (Loc, -- O._object'Acc | |
3338 | Attribute_Name => | |
3339 | Name_Unchecked_Access, | |
6782b1ef | 3340 | Prefix => |
1923d2d6 | 3341 | Make_Selected_Component (Loc, |
7675ad4f | 3342 | Prefix => |
1923d2d6 JM |
3343 | Make_Identifier (Loc, Name_uO), |
3344 | Selector_Name => | |
3345 | Make_Identifier (Loc, Name_uObject))), | |
3346 | ||
3347 | Make_Unchecked_Type_Conversion (Loc, -- entry index | |
3348 | Subtype_Mark => | |
6782b1ef AC |
3349 | New_Occurrence_Of |
3350 | (RTE (RE_Protected_Entry_Index), Loc), | |
7675ad4f | 3351 | Expression => Make_Identifier (Loc, Name_uI)), |
80b992ae | 3352 | |
1923d2d6 | 3353 | Make_Identifier (Loc, Name_uA)))), -- abort status |
80b992ae | 3354 | |
1923d2d6 JM |
3355 | Else_Statements => |
3356 | New_List ( | |
80b992ae | 3357 | |
1923d2d6 | 3358 | -- Call to Requeue_Task_To_Protected_Entry |
80b992ae | 3359 | |
1923d2d6 JM |
3360 | Make_Procedure_Call_Statement (Loc, |
3361 | Name => | |
6782b1ef AC |
3362 | New_Occurrence_Of |
3363 | (RTE (RE_Requeue_Task_To_Protected_Entry), Loc), | |
1923d2d6 JM |
3364 | Parameter_Associations => |
3365 | New_List ( | |
3366 | ||
3367 | Make_Attribute_Reference (Loc, -- O._object'Acc | |
6782b1ef AC |
3368 | Attribute_Name => Name_Unchecked_Access, |
3369 | Prefix => | |
1923d2d6 | 3370 | Make_Selected_Component (Loc, |
6782b1ef | 3371 | Prefix => |
1923d2d6 JM |
3372 | Make_Identifier (Loc, Name_uO), |
3373 | Selector_Name => | |
3374 | Make_Identifier (Loc, Name_uObject))), | |
3375 | ||
3376 | Make_Unchecked_Type_Conversion (Loc, -- entry index | |
3377 | Subtype_Mark => | |
6782b1ef AC |
3378 | New_Occurrence_Of |
3379 | (RTE (RE_Protected_Entry_Index), Loc), | |
3380 | Expression => Make_Identifier (Loc, Name_uI)), | |
80b992ae | 3381 | |
1923d2d6 JM |
3382 | Make_Identifier (Loc, Name_uA)))))); -- abort status |
3383 | end if; | |
6782b1ef | 3384 | |
80b992ae HK |
3385 | else |
3386 | pragma Assert (Is_Task_Type (Conc_Typ)); | |
3387 | ||
3388 | -- Generate: | |
3389 | -- if F then | |
3390 | -- System.Tasking.Rendezvous.Requeue_Protected_To_Task_Entry | |
3391 | -- (Protection_Entries_Access (P), | |
3392 | -- O._task_id, | |
3393 | -- Task_Entry_Index (I), | |
3394 | -- A); | |
3395 | -- else | |
3396 | -- System.Tasking.Rendezvous.Requeue_Task_Entry | |
3397 | -- (O._task_id, | |
3398 | -- Task_Entry_Index (I), | |
3399 | -- A); | |
3400 | -- end if; | |
3401 | ||
3402 | Append_To (Stmts, | |
3403 | Make_If_Statement (Loc, | |
7675ad4f | 3404 | Condition => Make_Identifier (Loc, Name_uF), |
80b992ae | 3405 | |
7675ad4f | 3406 | Then_Statements => New_List ( |
80b992ae | 3407 | |
7675ad4f | 3408 | -- Call to Requeue_Protected_To_Task_Entry |
80b992ae | 3409 | |
7675ad4f AC |
3410 | Make_Procedure_Call_Statement (Loc, |
3411 | Name => | |
e4494292 | 3412 | New_Occurrence_Of |
7675ad4f | 3413 | (RTE (RE_Requeue_Protected_To_Task_Entry), Loc), |
80b992ae | 3414 | |
7675ad4f | 3415 | Parameter_Associations => New_List ( |
80b992ae | 3416 | |
7675ad4f AC |
3417 | Make_Unchecked_Type_Conversion (Loc, -- PEA (P) |
3418 | Subtype_Mark => | |
e4494292 | 3419 | New_Occurrence_Of |
7675ad4f AC |
3420 | (RTE (RE_Protection_Entries_Access), Loc), |
3421 | Expression => Make_Identifier (Loc, Name_uP)), | |
80b992ae | 3422 | |
7675ad4f AC |
3423 | Make_Selected_Component (Loc, -- O._task_id |
3424 | Prefix => Make_Identifier (Loc, Name_uO), | |
3425 | Selector_Name => Make_Identifier (Loc, Name_uTask_Id)), | |
80b992ae | 3426 | |
7675ad4f AC |
3427 | Make_Unchecked_Type_Conversion (Loc, -- entry index |
3428 | Subtype_Mark => | |
e4494292 | 3429 | New_Occurrence_Of (RTE (RE_Task_Entry_Index), Loc), |
7675ad4f | 3430 | Expression => Make_Identifier (Loc, Name_uI)), |
80b992ae | 3431 | |
7675ad4f | 3432 | Make_Identifier (Loc, Name_uA)))), -- abort status |
80b992ae | 3433 | |
7675ad4f | 3434 | Else_Statements => New_List ( |
80b992ae | 3435 | |
7675ad4f | 3436 | -- Call to Requeue_Task_Entry |
80b992ae | 3437 | |
7675ad4f | 3438 | Make_Procedure_Call_Statement (Loc, |
6782b1ef AC |
3439 | Name => |
3440 | New_Occurrence_Of (RTE (RE_Requeue_Task_Entry), Loc), | |
80b992ae | 3441 | |
7675ad4f | 3442 | Parameter_Associations => New_List ( |
80b992ae | 3443 | |
7675ad4f AC |
3444 | Make_Selected_Component (Loc, -- O._task_id |
3445 | Prefix => Make_Identifier (Loc, Name_uO), | |
3446 | Selector_Name => Make_Identifier (Loc, Name_uTask_Id)), | |
80b992ae | 3447 | |
7675ad4f AC |
3448 | Make_Unchecked_Type_Conversion (Loc, -- entry index |
3449 | Subtype_Mark => | |
e4494292 | 3450 | New_Occurrence_Of (RTE (RE_Task_Entry_Index), Loc), |
7675ad4f | 3451 | Expression => Make_Identifier (Loc, Name_uI)), |
80b992ae | 3452 | |
7675ad4f | 3453 | Make_Identifier (Loc, Name_uA)))))); -- abort status |
80b992ae HK |
3454 | end if; |
3455 | ||
3456 | -- Even though no declarations are needed in both cases, we allocate | |
3457 | -- a list for entities added by Freeze. | |
3458 | ||
3459 | return | |
3460 | Make_Subprogram_Body (Loc, | |
6782b1ef AC |
3461 | Specification => Make_Disp_Requeue_Spec (Typ), |
3462 | Declarations => New_List, | |
80b992ae HK |
3463 | Handled_Statement_Sequence => |
3464 | Make_Handled_Sequence_Of_Statements (Loc, Stmts)); | |
3465 | end Make_Disp_Requeue_Body; | |
3466 | ||
3467 | ---------------------------- | |
3468 | -- Make_Disp_Requeue_Spec -- | |
3469 | ---------------------------- | |
3470 | ||
3471 | function Make_Disp_Requeue_Spec | |
3472 | (Typ : Entity_Id) return Node_Id | |
3473 | is | |
3474 | Loc : constant Source_Ptr := Sloc (Typ); | |
3475 | ||
3476 | begin | |
3477 | pragma Assert (not Restriction_Active (No_Dispatching_Calls)); | |
3478 | ||
3479 | -- O : in out Typ; - Object parameter | |
3480 | -- F : Boolean; - Protected (True) / task (False) flag | |
3481 | -- P : Address; - Protection_Entries_Access value | |
3482 | -- I : Entry_Index - Index of entry call | |
3483 | -- A : Boolean - Abort flag | |
3484 | ||
3485 | -- Note that the Protection_Entries_Access value is represented as a | |
3486 | -- System.Address in order to avoid dragging in the tasking runtime | |
3487 | -- when compiling sources without tasking constructs. | |
3488 | ||
3489 | return | |
3490 | Make_Procedure_Specification (Loc, | |
3491 | Defining_Unit_Name => | |
3492 | Make_Defining_Identifier (Loc, Name_uDisp_Requeue), | |
3493 | ||
6782b1ef | 3494 | Parameter_Specifications => New_List ( |
80b992ae HK |
3495 | |
3496 | Make_Parameter_Specification (Loc, -- O | |
3497 | Defining_Identifier => | |
3498 | Make_Defining_Identifier (Loc, Name_uO), | |
6782b1ef | 3499 | Parameter_Type => |
e4494292 | 3500 | New_Occurrence_Of (Typ, Loc), |
6782b1ef AC |
3501 | In_Present => True, |
3502 | Out_Present => True), | |
80b992ae HK |
3503 | |
3504 | Make_Parameter_Specification (Loc, -- F | |
3505 | Defining_Identifier => | |
3506 | Make_Defining_Identifier (Loc, Name_uF), | |
6782b1ef | 3507 | Parameter_Type => |
e4494292 | 3508 | New_Occurrence_Of (Standard_Boolean, Loc)), |
80b992ae HK |
3509 | |
3510 | Make_Parameter_Specification (Loc, -- P | |
3511 | Defining_Identifier => | |
3512 | Make_Defining_Identifier (Loc, Name_uP), | |
6782b1ef | 3513 | Parameter_Type => |
e4494292 | 3514 | New_Occurrence_Of (RTE (RE_Address), Loc)), |
80b992ae HK |
3515 | |
3516 | Make_Parameter_Specification (Loc, -- I | |
3517 | Defining_Identifier => | |
3518 | Make_Defining_Identifier (Loc, Name_uI), | |
6782b1ef | 3519 | Parameter_Type => |
e4494292 | 3520 | New_Occurrence_Of (Standard_Integer, Loc)), |
80b992ae HK |
3521 | |
3522 | Make_Parameter_Specification (Loc, -- A | |
3523 | Defining_Identifier => | |
3524 | Make_Defining_Identifier (Loc, Name_uA), | |
6782b1ef | 3525 | Parameter_Type => |
e4494292 | 3526 | New_Occurrence_Of (Standard_Boolean, Loc)))); |
80b992ae HK |
3527 | end Make_Disp_Requeue_Spec; |
3528 | ||
f4d379b8 HK |
3529 | --------------------------------- |
3530 | -- Make_Disp_Timed_Select_Body -- | |
3531 | --------------------------------- | |
3532 | ||
80b992ae HK |
3533 | -- For interface types, generate: |
3534 | ||
3535 | -- procedure _Disp_Timed_Select | |
3536 | -- (T : in out <Typ>; | |
3537 | -- S : Integer; | |
3538 | -- P : System.Address; | |
3539 | -- D : Duration; | |
3540 | -- M : Integer; | |
3541 | -- C : out Ada.Tags.Prim_Op_Kind; | |
3542 | -- F : out Boolean) | |
3543 | -- is | |
3544 | -- begin | |
14848f57 AC |
3545 | -- F := False; |
3546 | -- C := Ada.Tags.POK_Function; | |
80b992ae HK |
3547 | -- end _Disp_Timed_Select; |
3548 | ||
3549 | -- For protected types, generate: | |
3550 | ||
3551 | -- procedure _Disp_Timed_Select | |
3552 | -- (T : in out <Typ>; | |
3553 | -- S : Integer; | |
3554 | -- P : System.Address; | |
3555 | -- D : Duration; | |
3556 | -- M : Integer; | |
3557 | -- C : out Ada.Tags.Prim_Op_Kind; | |
3558 | -- F : out Boolean) | |
3559 | -- is | |
3560 | -- I : Integer; | |
3561 | ||
3562 | -- begin | |
3563 | -- C := Ada.Tags.Get_Prim_Op_Kind (Ada.Tags.Tag (<Typ>VP), S); | |
3564 | ||
3565 | -- if C = Ada.Tags.POK_Procedure | |
3566 | -- or else C = Ada.Tags.POK_Protected_Procedure | |
3567 | -- or else C = Ada.Tags.POK_Task_Procedure | |
3568 | -- then | |
3569 | -- F := True; | |
3570 | -- return; | |
3571 | -- end if; | |
3572 | ||
3573 | -- I := Ada.Tags.Get_Entry_Index (Ada.Tags.Tag (<Typ>VP), S); | |
3574 | -- System.Tasking.Protected_Objects.Operations. | |
3575 | -- Timed_Protected_Entry_Call | |
3576 | -- (T._object'Access, | |
3577 | -- System.Tasking.Protected_Objects.Protected_Entry_Index (I), | |
3578 | -- P, | |
3579 | -- D, | |
3580 | -- M, | |
3581 | -- F); | |
3582 | -- end _Disp_Timed_Select; | |
3583 | ||
3584 | -- For task types, generate: | |
3585 | ||
3586 | -- procedure _Disp_Timed_Select | |
3587 | -- (T : in out <Typ>; | |
3588 | -- S : Integer; | |
3589 | -- P : System.Address; | |
3590 | -- D : Duration; | |
3591 | -- M : Integer; | |
3592 | -- C : out Ada.Tags.Prim_Op_Kind; | |
3593 | -- F : out Boolean) | |
3594 | -- is | |
3595 | -- I : Integer; | |
3596 | ||
3597 | -- begin | |
3598 | -- I := Ada.Tags.Get_Entry_Index (Ada.Tags.Tag (<Typ>VP), S); | |
3599 | -- System.Tasking.Rendezvous.Timed_Task_Entry_Call | |
3600 | -- (T._task_id, | |
3601 | -- System.Tasking.Task_Entry_Index (I), | |
3602 | -- P, | |
3603 | -- D, | |
3604 | -- M, | |
14848f57 | 3605 | -- F); |
80b992ae HK |
3606 | -- end _Disp_Time_Select; |
3607 | ||
f4d379b8 HK |
3608 | function Make_Disp_Timed_Select_Body |
3609 | (Typ : Entity_Id) return Node_Id | |
3610 | is | |
3611 | Loc : constant Source_Ptr := Sloc (Typ); | |
3612 | Conc_Typ : Entity_Id := Empty; | |
3613 | Decls : constant List_Id := New_List; | |
1923d2d6 | 3614 | Obj_Ref : Node_Id; |
f4d379b8 | 3615 | Stmts : constant List_Id := New_List; |
e8374e7a | 3616 | Tag_Node : Node_Id; |
f4d379b8 HK |
3617 | |
3618 | begin | |
b0efe69e JM |
3619 | pragma Assert (not Restriction_Active (No_Dispatching_Calls)); |
3620 | ||
4d744221 JM |
3621 | -- Null body is generated for interface types |
3622 | ||
f4d379b8 HK |
3623 | if Is_Interface (Typ) then |
3624 | return | |
3625 | Make_Subprogram_Body (Loc, | |
6782b1ef AC |
3626 | Specification => Make_Disp_Timed_Select_Spec (Typ), |
3627 | Declarations => New_List, | |
f4d379b8 HK |
3628 | Handled_Statement_Sequence => |
3629 | Make_Handled_Sequence_Of_Statements (Loc, | |
833eaa8a AC |
3630 | New_List ( |
3631 | Make_Assignment_Statement (Loc, | |
3632 | Name => Make_Identifier (Loc, Name_uF), | |
e4494292 | 3633 | Expression => New_Occurrence_Of (Standard_False, Loc))))); |
f4d379b8 HK |
3634 | end if; |
3635 | ||
4d744221 JM |
3636 | if Is_Concurrent_Record_Type (Typ) then |
3637 | Conc_Typ := Corresponding_Concurrent_Type (Typ); | |
f4d379b8 HK |
3638 | |
3639 | -- Generate: | |
3640 | -- I : Integer; | |
3641 | ||
3642 | -- where I will be used to capture the entry index of the primitive | |
3643 | -- wrapper at position S. | |
3644 | ||
3645 | Append_To (Decls, | |
3646 | Make_Object_Declaration (Loc, | |
833eaa8a | 3647 | Defining_Identifier => Make_Defining_Identifier (Loc, Name_uI), |
e4494292 RD |
3648 | Object_Definition => |
3649 | New_Occurrence_Of (Standard_Integer, Loc))); | |
f4d379b8 | 3650 | |
4d744221 JM |
3651 | -- Generate: |
3652 | -- C := Get_Prim_Op_Kind (tag! (<type>VP), S); | |
f4d379b8 | 3653 | |
4d744221 JM |
3654 | -- if C = POK_Procedure |
3655 | -- or else C = POK_Protected_Procedure | |
3656 | -- or else C = POK_Task_Procedure; | |
3657 | -- then | |
3658 | -- F := True; | |
3659 | -- return; | |
3660 | -- end if; | |
f4d379b8 | 3661 | |
1138cf59 | 3662 | Build_Common_Dispatching_Select_Statements (Typ, Stmts); |
f4d379b8 HK |
3663 | |
3664 | -- Generate: | |
4d744221 | 3665 | -- I := Get_Entry_Index (tag! (<type>VP), S); |
f4d379b8 HK |
3666 | |
3667 | -- I is the entry index and S is the dispatch table slot | |
3668 | ||
e8374e7a AC |
3669 | if Tagged_Type_Expansion then |
3670 | Tag_Node := | |
3671 | Unchecked_Convert_To (RTE (RE_Tag), | |
e4494292 | 3672 | New_Occurrence_Of |
e8374e7a AC |
3673 | (Node (First_Elmt (Access_Disp_Table (Typ))), Loc)); |
3674 | ||
3675 | else | |
3676 | Tag_Node := | |
3677 | Make_Attribute_Reference (Loc, | |
e4494292 | 3678 | Prefix => New_Occurrence_Of (Typ, Loc), |
e8374e7a AC |
3679 | Attribute_Name => Name_Tag); |
3680 | end if; | |
3681 | ||
f4d379b8 HK |
3682 | Append_To (Stmts, |
3683 | Make_Assignment_Statement (Loc, | |
7675ad4f | 3684 | Name => Make_Identifier (Loc, Name_uI), |
f4d379b8 | 3685 | Expression => |
d0dd5209 | 3686 | Make_Function_Call (Loc, |
e4494292 | 3687 | Name => New_Occurrence_Of (RTE (RE_Get_Entry_Index), Loc), |
6782b1ef AC |
3688 | Parameter_Associations => New_List ( |
3689 | Tag_Node, | |
3690 | Make_Identifier (Loc, Name_uS))))); | |
f4d379b8 | 3691 | |
1923d2d6 JM |
3692 | -- Protected case |
3693 | ||
f4d379b8 HK |
3694 | if Ekind (Conc_Typ) = E_Protected_Type then |
3695 | ||
1923d2d6 JM |
3696 | -- Build T._object'Access |
3697 | ||
3698 | Obj_Ref := | |
3699 | Make_Attribute_Reference (Loc, | |
3700 | Attribute_Name => Name_Unchecked_Access, | |
3701 | Prefix => | |
3702 | Make_Selected_Component (Loc, | |
3703 | Prefix => Make_Identifier (Loc, Name_uT), | |
3704 | Selector_Name => Make_Identifier (Loc, Name_uObject))); | |
3705 | ||
3706 | -- Normal case, No_Entry_Queue restriction not active. In this | |
3707 | -- case we generate: | |
3708 | ||
3709 | -- Timed_Protected_Entry_Call | |
3710 | -- (T._object'access, | |
80b992ae | 3711 | -- Protected_Entry_Index! (I), |
1923d2d6 | 3712 | -- P, D, M, F); |
f4d379b8 HK |
3713 | |
3714 | -- where T is the protected object, I is the entry index, P are | |
3715 | -- the wrapped parameters, D is the delay amount, M is the delay | |
3716 | -- mode and F is the status flag. | |
3717 | ||
bdfb8ec4 AC |
3718 | -- Historically, there was also an implementation for single |
3719 | -- entry protected types (in s-tposen). However, it was removed | |
3720 | -- by also testing for no No_Select_Statements restriction in | |
3721 | -- Exp_Utils.Corresponding_Runtime_Package. This simplified the | |
74c10109 AC |
3722 | -- implementation of s-tposen.adb and provided consistency between |
3723 | -- all versions of System.Tasking.Protected_Objects.Single_Entry | |
3724 | -- (s-tposen*.adb). | |
bdfb8ec4 | 3725 | |
1923d2d6 JM |
3726 | case Corresponding_Runtime_Package (Conc_Typ) is |
3727 | when System_Tasking_Protected_Objects_Entries => | |
3728 | Append_To (Stmts, | |
3729 | Make_Procedure_Call_Statement (Loc, | |
3730 | Name => | |
e4494292 | 3731 | New_Occurrence_Of |
1923d2d6 | 3732 | (RTE (RE_Timed_Protected_Entry_Call), Loc), |
6782b1ef AC |
3733 | Parameter_Associations => New_List ( |
3734 | Obj_Ref, | |
1923d2d6 | 3735 | |
6782b1ef AC |
3736 | Make_Unchecked_Type_Conversion (Loc, -- entry index |
3737 | Subtype_Mark => | |
3738 | New_Occurrence_Of | |
3739 | (RTE (RE_Protected_Entry_Index), Loc), | |
3740 | Expression => Make_Identifier (Loc, Name_uI)), | |
f4d379b8 | 3741 | |
d8f43ee6 HK |
3742 | Make_Identifier (Loc, Name_uP), -- parameter block |
3743 | Make_Identifier (Loc, Name_uD), -- delay | |
3744 | Make_Identifier (Loc, Name_uM), -- delay mode | |
6782b1ef | 3745 | Make_Identifier (Loc, Name_uF)))); -- status flag |
f4d379b8 | 3746 | |
1923d2d6 JM |
3747 | when others => |
3748 | raise Program_Error; | |
3749 | end case; | |
3750 | ||
3751 | -- Task case | |
70482933 | 3752 | |
70482933 | 3753 | else |
f4d379b8 HK |
3754 | pragma Assert (Ekind (Conc_Typ) = E_Task_Type); |
3755 | ||
3756 | -- Generate: | |
3757 | -- Timed_Task_Entry_Call ( | |
3758 | -- T._task_id, | |
80b992ae | 3759 | -- Task_Entry_Index! (I), |
f4d379b8 HK |
3760 | -- P, |
3761 | -- D, | |
3762 | -- M, | |
3763 | -- F); | |
3764 | ||
3765 | -- where T is the task object, I is the entry index, P are the | |
3766 | -- wrapped parameters, D is the delay amount, M is the delay | |
3767 | -- mode and F is the status flag. | |
3768 | ||
3769 | Append_To (Stmts, | |
3770 | Make_Procedure_Call_Statement (Loc, | |
6782b1ef | 3771 | Name => |
e4494292 | 3772 | New_Occurrence_Of (RTE (RE_Timed_Task_Entry_Call), Loc), |
f4d379b8 | 3773 | |
6782b1ef AC |
3774 | Parameter_Associations => New_List ( |
3775 | Make_Selected_Component (Loc, -- T._task_id | |
3776 | Prefix => Make_Identifier (Loc, Name_uT), | |
3777 | Selector_Name => Make_Identifier (Loc, Name_uTask_Id)), | |
f4d379b8 | 3778 | |
6782b1ef AC |
3779 | Make_Unchecked_Type_Conversion (Loc, -- entry index |
3780 | Subtype_Mark => | |
3781 | New_Occurrence_Of (RTE (RE_Task_Entry_Index), Loc), | |
3782 | Expression => Make_Identifier (Loc, Name_uI)), | |
f4d379b8 | 3783 | |
6782b1ef AC |
3784 | Make_Identifier (Loc, Name_uP), -- parameter block |
3785 | Make_Identifier (Loc, Name_uD), -- delay | |
3786 | Make_Identifier (Loc, Name_uM), -- delay mode | |
3787 | Make_Identifier (Loc, Name_uF)))); -- status flag | |
70482933 | 3788 | end if; |
f2abc637 AC |
3789 | |
3790 | else | |
14848f57 | 3791 | -- Initialize out parameters |
f2abc637 | 3792 | |
14848f57 AC |
3793 | Append_To (Stmts, |
3794 | Make_Assignment_Statement (Loc, | |
833eaa8a | 3795 | Name => Make_Identifier (Loc, Name_uF), |
e4494292 | 3796 | Expression => New_Occurrence_Of (Standard_False, Loc))); |
14848f57 AC |
3797 | Append_To (Stmts, |
3798 | Make_Assignment_Statement (Loc, | |
833eaa8a | 3799 | Name => Make_Identifier (Loc, Name_uC), |
e4494292 | 3800 | Expression => New_Occurrence_Of (RTE (RE_POK_Function), Loc))); |
f4d379b8 HK |
3801 | end if; |
3802 | ||
3803 | return | |
3804 | Make_Subprogram_Body (Loc, | |
833eaa8a AC |
3805 | Specification => Make_Disp_Timed_Select_Spec (Typ), |
3806 | Declarations => Decls, | |
f4d379b8 HK |
3807 | Handled_Statement_Sequence => |
3808 | Make_Handled_Sequence_Of_Statements (Loc, Stmts)); | |
3809 | end Make_Disp_Timed_Select_Body; | |
3810 | ||
3811 | --------------------------------- | |
3812 | -- Make_Disp_Timed_Select_Spec -- | |
3813 | --------------------------------- | |
3814 | ||
3815 | function Make_Disp_Timed_Select_Spec | |
3816 | (Typ : Entity_Id) return Node_Id | |
3817 | is | |
3818 | Loc : constant Source_Ptr := Sloc (Typ); | |
3819 | Def_Id : constant Node_Id := | |
3820 | Make_Defining_Identifier (Loc, | |
3821 | Name_uDisp_Timed_Select); | |
3822 | Params : constant List_Id := New_List; | |
70482933 | 3823 | |
f4d379b8 | 3824 | begin |
b0efe69e JM |
3825 | pragma Assert (not Restriction_Active (No_Dispatching_Calls)); |
3826 | ||
d0dd5209 JM |
3827 | -- T : in out Typ; -- Object parameter |
3828 | -- S : Integer; -- Primitive operation slot | |
3829 | -- P : Address; -- Wrapped parameters | |
3830 | -- D : Duration; -- Delay | |
3831 | -- M : Integer; -- Delay Mode | |
3832 | -- C : out Prim_Op_Kind; -- Call kind | |
3833 | -- F : out Boolean; -- Status flag | |
f4d379b8 | 3834 | |
d0dd5209 JM |
3835 | Append_List_To (Params, New_List ( |
3836 | ||
3837 | Make_Parameter_Specification (Loc, | |
6782b1ef AC |
3838 | Defining_Identifier => Make_Defining_Identifier (Loc, Name_uT), |
3839 | Parameter_Type => New_Occurrence_Of (Typ, Loc), | |
3840 | In_Present => True, | |
3841 | Out_Present => True), | |
d0dd5209 JM |
3842 | |
3843 | Make_Parameter_Specification (Loc, | |
6782b1ef AC |
3844 | Defining_Identifier => Make_Defining_Identifier (Loc, Name_uS), |
3845 | Parameter_Type => New_Occurrence_Of (Standard_Integer, Loc)), | |
d0dd5209 JM |
3846 | |
3847 | Make_Parameter_Specification (Loc, | |
6782b1ef AC |
3848 | Defining_Identifier => Make_Defining_Identifier (Loc, Name_uP), |
3849 | Parameter_Type => New_Occurrence_Of (RTE (RE_Address), Loc)), | |
f4d379b8 | 3850 | |
f4d379b8 | 3851 | Make_Parameter_Specification (Loc, |
6782b1ef AC |
3852 | Defining_Identifier => Make_Defining_Identifier (Loc, Name_uD), |
3853 | Parameter_Type => New_Occurrence_Of (Standard_Duration, Loc)), | |
f4d379b8 | 3854 | |
f4d379b8 | 3855 | Make_Parameter_Specification (Loc, |
6782b1ef AC |
3856 | Defining_Identifier => Make_Defining_Identifier (Loc, Name_uM), |
3857 | Parameter_Type => New_Occurrence_Of (Standard_Integer, Loc)), | |
70482933 | 3858 | |
d0dd5209 | 3859 | Make_Parameter_Specification (Loc, |
6782b1ef AC |
3860 | Defining_Identifier => Make_Defining_Identifier (Loc, Name_uC), |
3861 | Parameter_Type => | |
e4494292 | 3862 | New_Occurrence_Of (RTE (RE_Prim_Op_Kind), Loc), |
6782b1ef | 3863 | Out_Present => True))); |
70482933 | 3864 | |
d0dd5209 JM |
3865 | Append_To (Params, |
3866 | Make_Parameter_Specification (Loc, | |
6782b1ef AC |
3867 | Defining_Identifier => Make_Defining_Identifier (Loc, Name_uF), |
3868 | Parameter_Type => New_Occurrence_Of (Standard_Boolean, Loc), | |
3869 | Out_Present => True)); | |
70482933 | 3870 | |
f4d379b8 HK |
3871 | return |
3872 | Make_Procedure_Specification (Loc, | |
3873 | Defining_Unit_Name => Def_Id, | |
3874 | Parameter_Specifications => Params); | |
3875 | end Make_Disp_Timed_Select_Spec; | |
70482933 | 3876 | |
f4d379b8 HK |
3877 | ------------- |
3878 | -- Make_DT -- | |
3879 | ------------- | |
70482933 | 3880 | |
d0dd5209 | 3881 | -- The frontend supports two models for expanding dispatch tables |
6782b1ef AC |
3882 | -- associated with library-level defined tagged types: statically and |
3883 | -- non-statically allocated dispatch tables. In the former case the object | |
3884 | -- containing the dispatch table is constant and it is initialized by means | |
3885 | -- of a positional aggregate. In the latter case, the object containing | |
3886 | -- the dispatch table is a variable which is initialized by means of | |
3887 | -- assignments. | |
d0dd5209 JM |
3888 | |
3889 | -- In case of locally defined tagged types, the object containing the | |
6782b1ef AC |
3890 | -- object containing the dispatch table is always a variable (instead of a |
3891 | -- constant). This is currently required to give support to late overriding | |
3892 | -- of primitives. For example: | |
d0dd5209 JM |
3893 | |
3894 | -- procedure Example is | |
3895 | -- package Pkg is | |
3896 | -- type T1 is tagged null record; | |
3897 | -- procedure Prim (O : T1); | |
3898 | -- end Pkg; | |
3899 | ||
3900 | -- type T2 is new Pkg.T1 with null record; | |
3901 | -- procedure Prim (X : T2) is -- late overriding | |
3902 | -- begin | |
3903 | -- ... | |
3904 | -- ... | |
3905 | -- end; | |
4d744221 | 3906 | |
b0bf18ad AC |
3907 | -- WARNING: This routine manages Ghost regions. Return statements must be |
3908 | -- replaced by gotos which jump to the end of the routine and restore the | |
3909 | -- Ghost mode. | |
3910 | ||
b2e1beb3 ES |
3911 | function Make_DT (Typ : Entity_Id; N : Node_Id := Empty) return List_Id is |
3912 | Loc : constant Source_Ptr := Sloc (Typ); | |
3913 | ||
d0dd5209 JM |
3914 | Max_Predef_Prims : constant Int := |
3915 | UI_To_Int | |
3916 | (Intval | |
3917 | (Expression | |
b2e1beb3 ES |
3918 | (Parent (RTE (RE_Max_Predef_Prims))))); |
3919 | ||
f2cbd970 JM |
3920 | DT_Decl : constant Elist_Id := New_Elmt_List; |
3921 | DT_Aggr : constant Elist_Id := New_Elmt_List; | |
3922 | -- Entities marked with attribute Is_Dispatch_Table_Entity | |
3923 | ||
15529d0a PMR |
3924 | Dummy_Object : Entity_Id := Empty; |
3925 | -- Extra nonexistent object of type Typ internally used to compute the | |
3926 | -- offset to the components that reference secondary dispatch tables. | |
7225a479 | 3927 | -- Used to compute the offset of components located at fixed position. |
15529d0a | 3928 | |
c0b11850 AC |
3929 | procedure Check_Premature_Freezing |
3930 | (Subp : Entity_Id; | |
3931 | Tagged_Type : Entity_Id; | |
3932 | Typ : Entity_Id); | |
1fb63e89 RD |
3933 | -- Verify that all untagged types in the profile of a subprogram are |
3934 | -- frozen at the point the subprogram is frozen. This enforces the rule | |
3935 | -- on RM 13.14 (14) as modified by AI05-019. At the point a subprogram | |
3936 | -- is frozen, enough must be known about it to build the activation | |
3937 | -- record for it, which requires at least that the size of all | |
3938 | -- parameters be known. Controlling arguments are by-reference, | |
7c0c194b | 3939 | -- and therefore the rule only applies to untagged types. Typical |
1fb63e89 RD |
3940 | -- violation of the rule involves an object declaration that freezes a |
3941 | -- tagged type, when one of its primitive operations has a type in its | |
3942 | -- profile whose full view has not been analyzed yet. More complex cases | |
3943 | -- involve composite types that have one private unfrozen subcomponent. | |
2d6f6e08 | 3944 | -- Move this check to sem??? |
d0dd5209 | 3945 | |
b16d9747 JM |
3946 | procedure Export_DT (Typ : Entity_Id; DT : Entity_Id; Index : Nat := 0); |
3947 | -- Export the dispatch table DT of tagged type Typ. Required to generate | |
3948 | -- forward references and statically allocate the table. For primary | |
3949 | -- dispatch tables Index is 0; for secondary dispatch tables the value | |
3950 | -- of index must match the Suffix_Index value assigned to the table by | |
3951 | -- Make_Tags when generating its unique external name, and it is used to | |
3952 | -- retrieve from the Dispatch_Table_Wrappers list associated with Typ | |
3953 | -- the external name generated by Import_DT. | |
e18d6a15 | 3954 | |
d0dd5209 | 3955 | procedure Make_Secondary_DT |
1923d2d6 JM |
3956 | (Typ : Entity_Id; |
3957 | Iface : Entity_Id; | |
15529d0a | 3958 | Iface_Comp : Node_Id; |
b16d9747 | 3959 | Suffix_Index : Int; |
1923d2d6 JM |
3960 | Num_Iface_Prims : Nat; |
3961 | Iface_DT_Ptr : Entity_Id; | |
3962 | Predef_Prims_Ptr : Entity_Id; | |
3963 | Build_Thunks : Boolean; | |
3964 | Result : List_Id); | |
80b992ae HK |
3965 | -- Ada 2005 (AI-251): Expand the declarations for a Secondary Dispatch |
3966 | -- Table of Typ associated with Iface. Each abstract interface of Typ | |
3967 | -- has two secondary dispatch tables: one containing pointers to thunks | |
3968 | -- and another containing pointers to the primitives covering the | |
3969 | -- interface primitives. The former secondary table is generated when | |
3970 | -- Build_Thunks is True, and provides common support for dispatching | |
3971 | -- calls through interface types; the latter secondary table is | |
3972 | -- generated when Build_Thunks is False, and provides support for | |
3973 | -- Generic Dispatching Constructors that dispatch calls through | |
53f29d4f AC |
3974 | -- interface types. When constructing this latter table the value of |
3975 | -- Suffix_Index is -1 to indicate that there is no need to export such | |
3976 | -- table when building statically allocated dispatch tables; a positive | |
3977 | -- value of Suffix_Index must match the Suffix_Index value assigned to | |
3978 | -- this secondary dispatch table by Make_Tags when its unique external | |
3979 | -- name was generated. | |
fbf5a39b | 3980 | |
bd5ed03a JM |
3981 | function Number_Of_Predefined_Prims (Typ : Entity_Id) return Nat; |
3982 | -- Returns the number of predefined primitives of Typ | |
3983 | ||
b2e1beb3 ES |
3984 | ------------------------------ |
3985 | -- Check_Premature_Freezing -- | |
3986 | ------------------------------ | |
3987 | ||
c0b11850 AC |
3988 | procedure Check_Premature_Freezing |
3989 | (Subp : Entity_Id; | |
3990 | Tagged_Type : Entity_Id; | |
3991 | Typ : Entity_Id) | |
3992 | is | |
3993 | Comp : Entity_Id; | |
c95aa61c AC |
3994 | |
3995 | function Is_Actual_For_Formal_Incomplete_Type | |
3996 | (T : Entity_Id) return Boolean; | |
590549fb AC |
3997 | -- In Ada 2012, if a nested generic has an incomplete formal type, |
3998 | -- the actual may be (and usually is) a private type whose completion | |
7134062a AC |
3999 | -- appears later. It is safe to build the dispatch table in this |
4000 | -- case, gigi will have full views available. | |
4001 | ||
4002 | ------------------------------------------ | |
4003 | -- Is_Actual_For_Formal_Incomplete_Type -- | |
4004 | ------------------------------------------ | |
4005 | ||
c95aa61c AC |
4006 | function Is_Actual_For_Formal_Incomplete_Type |
4007 | (T : Entity_Id) return Boolean | |
7134062a AC |
4008 | is |
4009 | Gen_Par : Entity_Id; | |
4010 | F : Node_Id; | |
c95aa61c | 4011 | |
7134062a AC |
4012 | begin |
4013 | if not Is_Generic_Instance (Current_Scope) | |
4014 | or else not Used_As_Generic_Actual (T) | |
4015 | then | |
4016 | return False; | |
7134062a AC |
4017 | else |
4018 | Gen_Par := Generic_Parent (Parent (Current_Scope)); | |
4019 | end if; | |
4020 | ||
4021 | F := | |
4022 | First | |
4023 | (Generic_Formal_Declarations | |
6782b1ef | 4024 | (Unit_Declaration_Node (Gen_Par))); |
7134062a AC |
4025 | while Present (F) loop |
4026 | if Ekind (Defining_Identifier (F)) = E_Incomplete_Type then | |
4027 | return True; | |
4028 | end if; | |
4029 | ||
4030 | Next (F); | |
4031 | end loop; | |
4032 | ||
4033 | return False; | |
4034 | end Is_Actual_For_Formal_Incomplete_Type; | |
53f29d4f | 4035 | |
c95aa61c AC |
4036 | -- Start of processing for Check_Premature_Freezing |
4037 | ||
b2e1beb3 | 4038 | begin |
b7539c3b AC |
4039 | -- Note that if the type is a (subtype of) a generic actual, the |
4040 | -- actual will have been frozen by the instantiation. | |
4041 | ||
b2e1beb3 | 4042 | if Present (N) |
c0b11850 | 4043 | and then Is_Private_Type (Typ) |
b2e1beb3 ES |
4044 | and then No (Full_View (Typ)) |
4045 | and then not Is_Generic_Type (Typ) | |
4046 | and then not Is_Tagged_Type (Typ) | |
4047 | and then not Is_Frozen (Typ) | |
b7539c3b | 4048 | and then not Is_Generic_Actual_Type (Typ) |
b2e1beb3 ES |
4049 | then |
4050 | Error_Msg_Sloc := Sloc (Subp); | |
ed2233dc | 4051 | Error_Msg_NE |
b2e1beb3 ES |
4052 | ("declaration must appear after completion of type &", N, Typ); |
4053 | Error_Msg_NE | |
6782b1ef AC |
4054 | ("\which is an untagged type in the profile of " |
4055 | & "primitive operation & declared#", N, Subp); | |
c0b11850 AC |
4056 | |
4057 | else | |
4058 | Comp := Private_Component (Typ); | |
4059 | ||
4060 | if not Is_Tagged_Type (Typ) | |
4061 | and then Present (Comp) | |
4062 | and then not Is_Frozen (Comp) | |
6782b1ef | 4063 | and then not Is_Actual_For_Formal_Incomplete_Type (Comp) |
c0b11850 AC |
4064 | then |
4065 | Error_Msg_Sloc := Sloc (Subp); | |
4066 | Error_Msg_Node_2 := Subp; | |
4067 | Error_Msg_Name_1 := Chars (Tagged_Type); | |
4068 | Error_Msg_NE | |
4069 | ("declaration must appear after completion of type &", | |
6782b1ef | 4070 | N, Comp); |
c0b11850 | 4071 | Error_Msg_NE |
6782b1ef AC |
4072 | ("\which is a component of untagged type& in the profile " |
4073 | & "of primitive & of type % that is frozen by the " | |
0bfa2f3c | 4074 | & "declaration", N, Typ); |
c0b11850 | 4075 | end if; |
b2e1beb3 ES |
4076 | end if; |
4077 | end Check_Premature_Freezing; | |
4078 | ||
e18d6a15 JM |
4079 | --------------- |
4080 | -- Export_DT -- | |
4081 | --------------- | |
4082 | ||
b16d9747 JM |
4083 | procedure Export_DT (Typ : Entity_Id; DT : Entity_Id; Index : Nat := 0) |
4084 | is | |
4085 | Count : Nat; | |
4086 | Elmt : Elmt_Id; | |
4087 | ||
e18d6a15 JM |
4088 | begin |
4089 | Set_Is_Statically_Allocated (DT); | |
4090 | Set_Is_True_Constant (DT); | |
4091 | Set_Is_Exported (DT); | |
4092 | ||
b16d9747 JM |
4093 | Count := 0; |
4094 | Elmt := First_Elmt (Dispatch_Table_Wrappers (Typ)); | |
4095 | while Count /= Index loop | |
4096 | Next_Elmt (Elmt); | |
4097 | Count := Count + 1; | |
4098 | end loop; | |
4099 | ||
76f9c7f4 BD |
4100 | -- Related_Type (Node (Elmt)) should be equal to Typ here, but we |
4101 | -- can't assert that, because it is sometimes false in illegal | |
4102 | -- programs. We can't check Serious_Errors_Detected, because the | |
4103 | -- errors have not yet been detected. | |
b16d9747 | 4104 | |
93582885 | 4105 | Get_External_Name (Node (Elmt)); |
e18d6a15 JM |
4106 | Set_Interface_Name (DT, |
4107 | Make_String_Literal (Loc, | |
4108 | Strval => String_From_Name_Buffer)); | |
4109 | ||
4110 | -- Ensure proper Sprint output of this implicit importation | |
4111 | ||
4112 | Set_Is_Internal (DT); | |
4113 | Set_Is_Public (DT); | |
4114 | end Export_DT; | |
4115 | ||
d0dd5209 JM |
4116 | ----------------------- |
4117 | -- Make_Secondary_DT -- | |
4118 | ----------------------- | |
70482933 | 4119 | |
d0dd5209 | 4120 | procedure Make_Secondary_DT |
1923d2d6 JM |
4121 | (Typ : Entity_Id; |
4122 | Iface : Entity_Id; | |
15529d0a | 4123 | Iface_Comp : Node_Id; |
b16d9747 | 4124 | Suffix_Index : Int; |
1923d2d6 JM |
4125 | Num_Iface_Prims : Nat; |
4126 | Iface_DT_Ptr : Entity_Id; | |
4127 | Predef_Prims_Ptr : Entity_Id; | |
4128 | Build_Thunks : Boolean; | |
4129 | Result : List_Id) | |
d0dd5209 JM |
4130 | is |
4131 | Loc : constant Source_Ptr := Sloc (Typ); | |
b16d9747 JM |
4132 | Exporting_Table : constant Boolean := |
4133 | Building_Static_DT (Typ) | |
4134 | and then Suffix_Index > 0; | |
2287a75d AC |
4135 | Iface_DT : constant Entity_Id := Make_Temporary (Loc, 'T'); |
4136 | Predef_Prims : constant Entity_Id := Make_Temporary (Loc, 'R'); | |
d0dd5209 JM |
4137 | DT_Constr_List : List_Id; |
4138 | DT_Aggr_List : List_Id; | |
4139 | Empty_DT : Boolean := False; | |
d0dd5209 JM |
4140 | Nb_Prim : Nat; |
4141 | New_Node : Node_Id; | |
4142 | OSD : Entity_Id; | |
4143 | OSD_Aggr_List : List_Id; | |
d0dd5209 JM |
4144 | Prim : Entity_Id; |
4145 | Prim_Elmt : Elmt_Id; | |
4146 | Prim_Ops_Aggr_List : List_Id; | |
dee4682a | 4147 | |
d0dd5209 | 4148 | begin |
b2e1beb3 ES |
4149 | -- Handle cases in which we do not generate statically allocated |
4150 | -- dispatch tables. | |
dee4682a | 4151 | |
e18d6a15 | 4152 | if not Building_Static_DT (Typ) then |
d0dd5209 | 4153 | Set_Ekind (Predef_Prims, E_Variable); |
d0dd5209 | 4154 | Set_Ekind (Iface_DT, E_Variable); |
dee4682a | 4155 | |
d0dd5209 JM |
4156 | -- Statically allocated dispatch tables and related entities are |
4157 | -- constants. | |
dee4682a | 4158 | |
d0dd5209 JM |
4159 | else |
4160 | Set_Ekind (Predef_Prims, E_Constant); | |
4161 | Set_Is_Statically_Allocated (Predef_Prims); | |
4162 | Set_Is_True_Constant (Predef_Prims); | |
dee4682a | 4163 | |
d0dd5209 JM |
4164 | Set_Ekind (Iface_DT, E_Constant); |
4165 | Set_Is_Statically_Allocated (Iface_DT); | |
4166 | Set_Is_True_Constant (Iface_DT); | |
dee4682a JM |
4167 | end if; |
4168 | ||
b16d9747 JM |
4169 | -- Calculate the number of slots of the dispatch table. If the number |
4170 | -- of primitives of Typ is 0 we reserve a dummy single entry for its | |
e7c0dd39 | 4171 | -- DT because at run time the pointer to this dummy entry will be |
b16d9747 | 4172 | -- used as the tag. |
b0efe69e | 4173 | |
80b992ae | 4174 | if Num_Iface_Prims = 0 then |
d0dd5209 JM |
4175 | Empty_DT := True; |
4176 | Nb_Prim := 1; | |
80b992ae HK |
4177 | else |
4178 | Nb_Prim := Num_Iface_Prims; | |
d0dd5209 | 4179 | end if; |
f4d379b8 | 4180 | |
d0dd5209 | 4181 | -- Generate: |
4d744221 | 4182 | |
d0dd5209 JM |
4183 | -- Predef_Prims : Address_Array (1 .. Default_Prim_Ops_Count) := |
4184 | -- (predef-prim-op-thunk-1'address, | |
4185 | -- predef-prim-op-thunk-2'address, | |
4186 | -- ... | |
4187 | -- predef-prim-op-thunk-n'address); | |
4d744221 | 4188 | |
bd5ed03a JM |
4189 | -- Create the thunks associated with the predefined primitives and |
4190 | -- save their entity to fill the aggregate. | |
70482933 | 4191 | |
d0dd5209 | 4192 | declare |
bd5ed03a JM |
4193 | Nb_P_Prims : constant Nat := Number_Of_Predefined_Prims (Typ); |
4194 | Prim_Table : array (Nat range 1 .. Nb_P_Prims) of Entity_Id; | |
f2cbd970 | 4195 | Decl : Node_Id; |
d0dd5209 JM |
4196 | Thunk_Id : Entity_Id; |
4197 | Thunk_Code : Node_Id; | |
758c442c | 4198 | |
d0dd5209 JM |
4199 | begin |
4200 | Prim_Ops_Aggr_List := New_List; | |
4201 | Prim_Table := (others => Empty); | |
758c442c | 4202 | |
80b992ae HK |
4203 | if Building_Static_DT (Typ) then |
4204 | Prim_Elmt := First_Elmt (Primitive_Operations (Typ)); | |
4205 | while Present (Prim_Elmt) loop | |
4206 | Prim := Node (Prim_Elmt); | |
758c442c | 4207 | |
80b992ae HK |
4208 | if Is_Predefined_Dispatching_Operation (Prim) |
4209 | and then not Is_Abstract_Subprogram (Prim) | |
9e9df9da | 4210 | and then not Is_Eliminated (Prim) |
078b1a5f | 4211 | and then not Generate_SCIL |
80b992ae HK |
4212 | and then not Present (Prim_Table |
4213 | (UI_To_Int (DT_Position (Prim)))) | |
4214 | then | |
4215 | if not Build_Thunks then | |
4216 | Prim_Table (UI_To_Int (DT_Position (Prim))) := | |
4217 | Alias (Prim); | |
758c442c | 4218 | |
80b992ae | 4219 | else |
20dc266e JM |
4220 | Expand_Interface_Thunk |
4221 | (Prim, Thunk_Id, Thunk_Code, Iface); | |
758c442c | 4222 | |
80b992ae HK |
4223 | if Present (Thunk_Id) then |
4224 | Append_To (Result, Thunk_Code); | |
497a660d AC |
4225 | Prim_Table (UI_To_Int (DT_Position (Prim))) := |
4226 | Thunk_Id; | |
80b992ae HK |
4227 | end if; |
4228 | end if; | |
d0dd5209 | 4229 | end if; |
758c442c | 4230 | |
80b992ae HK |
4231 | Next_Elmt (Prim_Elmt); |
4232 | end loop; | |
4233 | end if; | |
758c442c | 4234 | |
d0dd5209 JM |
4235 | for J in Prim_Table'Range loop |
4236 | if Present (Prim_Table (J)) then | |
4237 | New_Node := | |
f2cbd970 | 4238 | Unchecked_Convert_To (RTE (RE_Prim_Ptr), |
1923d2d6 | 4239 | Make_Attribute_Reference (Loc, |
e4494292 | 4240 | Prefix => New_Occurrence_Of (Prim_Table (J), Loc), |
1923d2d6 | 4241 | Attribute_Name => Name_Unrestricted_Access)); |
d0dd5209 | 4242 | else |
f2cbd970 | 4243 | New_Node := Make_Null (Loc); |
d0dd5209 | 4244 | end if; |
4d744221 | 4245 | |
d0dd5209 JM |
4246 | Append_To (Prim_Ops_Aggr_List, New_Node); |
4247 | end loop; | |
4d744221 | 4248 | |
f2cbd970 | 4249 | New_Node := |
6782b1ef | 4250 | Make_Aggregate (Loc, Expressions => Prim_Ops_Aggr_List); |
f2cbd970 JM |
4251 | |
4252 | -- Remember aggregates initializing dispatch tables | |
4253 | ||
4254 | Append_Elmt (New_Node, DT_Aggr); | |
4255 | ||
4256 | Decl := | |
4257 | Make_Subtype_Declaration (Loc, | |
2287a75d AC |
4258 | Defining_Identifier => Make_Temporary (Loc, 'S'), |
4259 | Subtype_Indication => | |
e4494292 | 4260 | New_Occurrence_Of (RTE (RE_Address_Array), Loc)); |
f2cbd970 JM |
4261 | |
4262 | Append_To (Result, Decl); | |
4263 | ||
d0dd5209 JM |
4264 | Append_To (Result, |
4265 | Make_Object_Declaration (Loc, | |
4266 | Defining_Identifier => Predef_Prims, | |
e18d6a15 | 4267 | Constant_Present => Building_Static_DT (Typ), |
d0dd5209 | 4268 | Aliased_Present => True, |
e4494292 | 4269 | Object_Definition => New_Occurrence_Of |
f2cbd970 JM |
4270 | (Defining_Identifier (Decl), Loc), |
4271 | Expression => New_Node)); | |
d0dd5209 | 4272 | end; |
758c442c | 4273 | |
d0dd5209 | 4274 | -- Generate |
f4d379b8 | 4275 | |
d0dd5209 JM |
4276 | -- OSD : Ada.Tags.Object_Specific_Data (Nb_Prims) := |
4277 | -- (OSD_Table => (1 => <value>, | |
4278 | -- ... | |
4279 | -- N => <value>)); | |
f04e9787 | 4280 | -- for OSD'Alignment use Address'Alignment; |
f4d379b8 | 4281 | |
d0dd5209 JM |
4282 | -- Iface_DT : Dispatch_Table (Nb_Prims) := |
4283 | -- ([ Signature => <sig-value> ], | |
4284 | -- Tag_Kind => <tag_kind-value>, | |
4285 | -- Predef_Prims => Predef_Prims'Address, | |
4286 | -- Offset_To_Top => 0, | |
4287 | -- OSD => OSD'Address, | |
4288 | -- Prims_Ptr => (prim-op-1'address, | |
4289 | -- prim-op-2'address, | |
4290 | -- ... | |
4291 | -- prim-op-n'address)); | |
f4d379b8 | 4292 | |
d0dd5209 | 4293 | -- Stage 3: Initialize the discriminant and the record components |
758c442c | 4294 | |
d0dd5209 JM |
4295 | DT_Constr_List := New_List; |
4296 | DT_Aggr_List := New_List; | |
dee4682a | 4297 | |
9b7424a7 | 4298 | -- Nb_Prim |
dee4682a | 4299 | |
9b7424a7 AC |
4300 | Append_To (DT_Constr_List, Make_Integer_Literal (Loc, Nb_Prim)); |
4301 | Append_To (DT_Aggr_List, Make_Integer_Literal (Loc, Nb_Prim)); | |
dee4682a | 4302 | |
d0dd5209 | 4303 | -- Signature |
dee4682a | 4304 | |
d0dd5209 JM |
4305 | if RTE_Record_Component_Available (RE_Signature) then |
4306 | Append_To (DT_Aggr_List, | |
e4494292 | 4307 | New_Occurrence_Of (RTE (RE_Secondary_DT), Loc)); |
d0dd5209 | 4308 | end if; |
dee4682a | 4309 | |
d0dd5209 | 4310 | -- Tag_Kind |
dee4682a | 4311 | |
d0dd5209 JM |
4312 | if RTE_Record_Component_Available (RE_Tag_Kind) then |
4313 | Append_To (DT_Aggr_List, Tagged_Kind (Typ)); | |
4314 | end if; | |
758c442c | 4315 | |
d0dd5209 | 4316 | -- Predef_Prims |
758c442c | 4317 | |
d0dd5209 JM |
4318 | Append_To (DT_Aggr_List, |
4319 | Make_Attribute_Reference (Loc, | |
6782b1ef | 4320 | Prefix => New_Occurrence_Of (Predef_Prims, Loc), |
d0dd5209 | 4321 | Attribute_Name => Name_Address)); |
758c442c | 4322 | |
7225a479 JM |
4323 | -- Interface component located at variable offset; the value of |
4324 | -- Offset_To_Top will be set by the init subprogram. | |
758c442c | 4325 | |
7225a479 JM |
4326 | if No (Dummy_Object) |
4327 | or else Is_Variable_Size_Record (Etype (Scope (Iface_Comp))) | |
4328 | then | |
15529d0a PMR |
4329 | Append_To (DT_Aggr_List, Make_Integer_Literal (Loc, 0)); |
4330 | ||
7225a479 JM |
4331 | -- Interface component located at fixed offset |
4332 | ||
15529d0a PMR |
4333 | else |
4334 | Append_To (DT_Aggr_List, | |
d0567dc0 PMR |
4335 | Make_Op_Minus (Loc, |
4336 | Make_Attribute_Reference (Loc, | |
4337 | Prefix => | |
4338 | Make_Selected_Component (Loc, | |
4339 | Prefix => | |
4340 | New_Occurrence_Of (Dummy_Object, Loc), | |
4341 | Selector_Name => | |
4342 | New_Occurrence_Of (Iface_Comp, Loc)), | |
4343 | Attribute_Name => Name_Position))); | |
15529d0a | 4344 | end if; |
758c442c | 4345 | |
d0dd5209 JM |
4346 | -- Generate the Object Specific Data table required to dispatch calls |
4347 | -- through synchronized interfaces. | |
758c442c | 4348 | |
d0dd5209 JM |
4349 | if Empty_DT |
4350 | or else Is_Abstract_Type (Typ) | |
4351 | or else Is_Controlled (Typ) | |
4352 | or else Restriction_Active (No_Dispatching_Calls) | |
4353 | or else not Is_Limited_Type (Typ) | |
ce2b6ba5 | 4354 | or else not Has_Interfaces (Typ) |
80b992ae | 4355 | or else not Build_Thunks |
3dd9959c | 4356 | or else not RTE_Record_Component_Available (RE_OSD_Table) |
d0dd5209 JM |
4357 | then |
4358 | -- No OSD table required | |
70482933 | 4359 | |
d0dd5209 | 4360 | Append_To (DT_Aggr_List, |
e4494292 | 4361 | New_Occurrence_Of (RTE (RE_Null_Address), Loc)); |
10b93b2e | 4362 | |
d0dd5209 JM |
4363 | else |
4364 | OSD_Aggr_List := New_List; | |
10b93b2e | 4365 | |
d0dd5209 JM |
4366 | declare |
4367 | Prim_Table : array (Nat range 1 .. Nb_Prim) of Entity_Id; | |
4368 | Prim : Entity_Id; | |
4369 | Prim_Alias : Entity_Id; | |
4370 | Prim_Elmt : Elmt_Id; | |
4371 | E : Entity_Id; | |
4372 | Count : Nat := 0; | |
4373 | Pos : Nat; | |
10b93b2e | 4374 | |
d0dd5209 JM |
4375 | begin |
4376 | Prim_Table := (others => Empty); | |
4377 | Prim_Alias := Empty; | |
10b93b2e | 4378 | |
d0dd5209 JM |
4379 | Prim_Elmt := First_Elmt (Primitive_Operations (Typ)); |
4380 | while Present (Prim_Elmt) loop | |
4381 | Prim := Node (Prim_Elmt); | |
10b93b2e | 4382 | |
ce2b6ba5 | 4383 | if Present (Interface_Alias (Prim)) |
d0dd5209 | 4384 | and then Find_Dispatching_Type |
ce2b6ba5 | 4385 | (Interface_Alias (Prim)) = Iface |
d0dd5209 | 4386 | then |
ce2b6ba5 | 4387 | Prim_Alias := Interface_Alias (Prim); |
b81a5940 | 4388 | E := Ultimate_Alias (Prim); |
d0dd5209 | 4389 | Pos := UI_To_Int (DT_Position (Prim_Alias)); |
b0efe69e | 4390 | |
d0dd5209 JM |
4391 | if Present (Prim_Table (Pos)) then |
4392 | pragma Assert (Prim_Table (Pos) = E); | |
4393 | null; | |
b0efe69e | 4394 | |
d0dd5209 JM |
4395 | else |
4396 | Prim_Table (Pos) := E; | |
4397 | ||
4398 | Append_To (OSD_Aggr_List, | |
4399 | Make_Component_Association (Loc, | |
6782b1ef | 4400 | Choices => New_List ( |
d0dd5209 JM |
4401 | Make_Integer_Literal (Loc, |
4402 | DT_Position (Prim_Alias))), | |
4403 | Expression => | |
4404 | Make_Integer_Literal (Loc, | |
4405 | DT_Position (Alias (Prim))))); | |
4406 | ||
4407 | Count := Count + 1; | |
4408 | end if; | |
4409 | end if; | |
4410 | ||
4411 | Next_Elmt (Prim_Elmt); | |
4412 | end loop; | |
4413 | pragma Assert (Count = Nb_Prim); | |
4414 | end; | |
4415 | ||
2287a75d | 4416 | OSD := Make_Temporary (Loc, 'I'); |
d0dd5209 JM |
4417 | |
4418 | Append_To (Result, | |
4419 | Make_Object_Declaration (Loc, | |
4420 | Defining_Identifier => OSD, | |
6dc56535 | 4421 | Constant_Present => True, |
d0dd5209 JM |
4422 | Object_Definition => |
4423 | Make_Subtype_Indication (Loc, | |
4424 | Subtype_Mark => | |
e4494292 | 4425 | New_Occurrence_Of (RTE (RE_Object_Specific_Data), Loc), |
6782b1ef | 4426 | Constraint => |
d0dd5209 JM |
4427 | Make_Index_Or_Discriminant_Constraint (Loc, |
4428 | Constraints => New_List ( | |
4429 | Make_Integer_Literal (Loc, Nb_Prim)))), | |
d0dd5209 | 4430 | |
2287a75d AC |
4431 | Expression => |
4432 | Make_Aggregate (Loc, | |
4433 | Component_Associations => New_List ( | |
4434 | Make_Component_Association (Loc, | |
6782b1ef | 4435 | Choices => New_List ( |
2287a75d AC |
4436 | New_Occurrence_Of |
4437 | (RTE_Record_Component (RE_OSD_Num_Prims), Loc)), | |
4438 | Expression => | |
4439 | Make_Integer_Literal (Loc, Nb_Prim)), | |
4440 | ||
4441 | Make_Component_Association (Loc, | |
6782b1ef | 4442 | Choices => New_List ( |
2287a75d AC |
4443 | New_Occurrence_Of |
4444 | (RTE_Record_Component (RE_OSD_Table), Loc)), | |
4445 | Expression => Make_Aggregate (Loc, | |
4446 | Component_Associations => OSD_Aggr_List)))))); | |
d0dd5209 | 4447 | |
b2e1beb3 ES |
4448 | Append_To (Result, |
4449 | Make_Attribute_Definition_Clause (Loc, | |
e4494292 | 4450 | Name => New_Occurrence_Of (OSD, Loc), |
b2e1beb3 ES |
4451 | Chars => Name_Alignment, |
4452 | Expression => | |
4453 | Make_Attribute_Reference (Loc, | |
6782b1ef | 4454 | Prefix => |
e4494292 | 4455 | New_Occurrence_Of (RTE (RE_Integer_Address), Loc), |
b2e1beb3 ES |
4456 | Attribute_Name => Name_Alignment))); |
4457 | ||
d0dd5209 | 4458 | -- In secondary dispatch tables the Typeinfo component contains |
c7cb99f8 | 4459 | -- the address of the Object Specific Data (see a-tags.ads). |
d0dd5209 JM |
4460 | |
4461 | Append_To (DT_Aggr_List, | |
4462 | Make_Attribute_Reference (Loc, | |
6782b1ef | 4463 | Prefix => New_Occurrence_Of (OSD, Loc), |
d0dd5209 JM |
4464 | Attribute_Name => Name_Address)); |
4465 | end if; | |
4466 | ||
4467 | -- Initialize the table of primitive operations | |
4468 | ||
4469 | Prim_Ops_Aggr_List := New_List; | |
4470 | ||
4471 | if Empty_DT then | |
f2cbd970 | 4472 | Append_To (Prim_Ops_Aggr_List, Make_Null (Loc)); |
d0dd5209 JM |
4473 | |
4474 | elsif Is_Abstract_Type (Typ) | |
bfae1846 | 4475 | or else not Building_Static_DT (Typ) |
d0dd5209 JM |
4476 | then |
4477 | for J in 1 .. Nb_Prim loop | |
f2cbd970 | 4478 | Append_To (Prim_Ops_Aggr_List, Make_Null (Loc)); |
d0dd5209 JM |
4479 | end loop; |
4480 | ||
4481 | else | |
4482 | declare | |
cefce34c JM |
4483 | CPP_Nb_Prims : constant Nat := CPP_Num_Prims (Typ); |
4484 | E : Entity_Id; | |
4485 | Prim_Pos : Nat; | |
4486 | Prim_Table : array (Nat range 1 .. Nb_Prim) of Entity_Id; | |
4487 | Thunk_Code : Node_Id; | |
4488 | Thunk_Id : Entity_Id; | |
d0dd5209 JM |
4489 | |
4490 | begin | |
4491 | Prim_Table := (others => Empty); | |
4492 | ||
4493 | Prim_Elmt := First_Elmt (Primitive_Operations (Typ)); | |
4494 | while Present (Prim_Elmt) loop | |
cefce34c JM |
4495 | Prim := Node (Prim_Elmt); |
4496 | E := Ultimate_Alias (Prim); | |
4497 | Prim_Pos := UI_To_Int (DT_Position (E)); | |
d0dd5209 | 4498 | |
cefce34c JM |
4499 | -- Do not reference predefined primitives because they are |
4500 | -- located in a separate dispatch table; skip abstract and | |
4501 | -- eliminated primitives; skip primitives located in the C++ | |
4502 | -- part of the dispatch table because their slot is set by | |
4503 | -- the IC routine. | |
9e9df9da | 4504 | |
d0dd5209 | 4505 | if not Is_Predefined_Dispatching_Operation (Prim) |
ce2b6ba5 | 4506 | and then Present (Interface_Alias (Prim)) |
d0dd5209 | 4507 | and then not Is_Abstract_Subprogram (Alias (Prim)) |
9e9df9da | 4508 | and then not Is_Eliminated (Alias (Prim)) |
cefce34c JM |
4509 | and then (not Is_CPP_Class (Root_Type (Typ)) |
4510 | or else Prim_Pos > CPP_Nb_Prims) | |
d0dd5209 | 4511 | and then Find_Dispatching_Type |
ce2b6ba5 | 4512 | (Interface_Alias (Prim)) = Iface |
d0dd5209 JM |
4513 | |
4514 | -- Generate the code of the thunk only if the abstract | |
4515 | -- interface type is not an immediate ancestor of | |
cefce34c | 4516 | -- Tagged_Type. Otherwise the DT associated with the |
d0dd5209 JM |
4517 | -- interface is the primary DT. |
4518 | ||
4ac2477e JM |
4519 | and then not Is_Ancestor (Iface, Typ, |
4520 | Use_Full_View => True) | |
d0dd5209 | 4521 | then |
80b992ae | 4522 | if not Build_Thunks then |
cefce34c | 4523 | Prim_Pos := |
ce2b6ba5 | 4524 | UI_To_Int (DT_Position (Interface_Alias (Prim))); |
cefce34c JM |
4525 | Prim_Table (Prim_Pos) := Alias (Prim); |
4526 | ||
80b992ae | 4527 | else |
20dc266e JM |
4528 | Expand_Interface_Thunk |
4529 | (Prim, Thunk_Id, Thunk_Code, Iface); | |
d0dd5209 | 4530 | |
80b992ae | 4531 | if Present (Thunk_Id) then |
cefce34c | 4532 | Prim_Pos := |
ce2b6ba5 | 4533 | UI_To_Int (DT_Position (Interface_Alias (Prim))); |
80b992ae | 4534 | |
cefce34c | 4535 | Prim_Table (Prim_Pos) := Thunk_Id; |
80b992ae HK |
4536 | Append_To (Result, Thunk_Code); |
4537 | end if; | |
d0dd5209 JM |
4538 | end if; |
4539 | end if; | |
4540 | ||
4541 | Next_Elmt (Prim_Elmt); | |
4542 | end loop; | |
4543 | ||
4544 | for J in Prim_Table'Range loop | |
4545 | if Present (Prim_Table (J)) then | |
4546 | New_Node := | |
f2cbd970 | 4547 | Unchecked_Convert_To (RTE (RE_Prim_Ptr), |
1923d2d6 | 4548 | Make_Attribute_Reference (Loc, |
e4494292 | 4549 | Prefix => New_Occurrence_Of (Prim_Table (J), Loc), |
1923d2d6 | 4550 | Attribute_Name => Name_Unrestricted_Access)); |
cefce34c | 4551 | |
d0dd5209 | 4552 | else |
f2cbd970 | 4553 | New_Node := Make_Null (Loc); |
d0dd5209 JM |
4554 | end if; |
4555 | ||
4556 | Append_To (Prim_Ops_Aggr_List, New_Node); | |
4557 | end loop; | |
4558 | end; | |
4559 | end if; | |
4560 | ||
f2cbd970 | 4561 | New_Node := |
d0dd5209 | 4562 | Make_Aggregate (Loc, |
f2cbd970 JM |
4563 | Expressions => Prim_Ops_Aggr_List); |
4564 | ||
4565 | Append_To (DT_Aggr_List, New_Node); | |
4566 | ||
4567 | -- Remember aggregates initializing dispatch tables | |
4568 | ||
4569 | Append_Elmt (New_Node, DT_Aggr); | |
d0dd5209 | 4570 | |
15529d0a PMR |
4571 | -- Note: Secondary dispatch tables are declared constant only if |
4572 | -- we can compute their offset field by means of the extra dummy | |
4573 | -- object; otherwise they cannot be declared constant and the | |
4574 | -- Offset_To_Top component is initialized by the IP routine. | |
b16d9747 | 4575 | |
d0dd5209 JM |
4576 | Append_To (Result, |
4577 | Make_Object_Declaration (Loc, | |
4578 | Defining_Identifier => Iface_DT, | |
4579 | Aliased_Present => True, | |
7225a479 | 4580 | Constant_Present => Building_Static_Secondary_DT (Typ), |
b16d9747 | 4581 | |
d0dd5209 JM |
4582 | Object_Definition => |
4583 | Make_Subtype_Indication (Loc, | |
e4494292 | 4584 | Subtype_Mark => New_Occurrence_Of |
d0dd5209 JM |
4585 | (RTE (RE_Dispatch_Table_Wrapper), Loc), |
4586 | Constraint => Make_Index_Or_Discriminant_Constraint (Loc, | |
4587 | Constraints => DT_Constr_List)), | |
4588 | ||
b16d9747 JM |
4589 | Expression => |
4590 | Make_Aggregate (Loc, | |
4591 | Expressions => DT_Aggr_List))); | |
d0dd5209 | 4592 | |
b16d9747 JM |
4593 | if Exporting_Table then |
4594 | Export_DT (Typ, Iface_DT, Suffix_Index); | |
4595 | ||
d0dd5209 JM |
4596 | -- Generate code to create the pointer to the dispatch table |
4597 | ||
b16d9747 | 4598 | -- Iface_DT_Ptr : Tag := Tag!(DT.Prims_Ptr'Address); |
d0dd5209 | 4599 | |
b16d9747 JM |
4600 | -- Note: This declaration is not added here if the table is exported |
4601 | -- because in such case Make_Tags has already added this declaration. | |
4602 | ||
4603 | else | |
4604 | Append_To (Result, | |
4605 | Make_Object_Declaration (Loc, | |
4606 | Defining_Identifier => Iface_DT_Ptr, | |
4607 | Constant_Present => True, | |
4608 | ||
4609 | Object_Definition => | |
e4494292 | 4610 | New_Occurrence_Of (RTE (RE_Interface_Tag), Loc), |
b16d9747 JM |
4611 | |
4612 | Expression => | |
4613 | Unchecked_Convert_To (RTE (RE_Interface_Tag), | |
4614 | Make_Attribute_Reference (Loc, | |
4615 | Prefix => | |
4616 | Make_Selected_Component (Loc, | |
e4494292 | 4617 | Prefix => New_Occurrence_Of (Iface_DT, Loc), |
b16d9747 JM |
4618 | Selector_Name => |
4619 | New_Occurrence_Of | |
4620 | (RTE_Record_Component (RE_Prims_Ptr), Loc)), | |
4621 | Attribute_Name => Name_Address)))); | |
4622 | end if; | |
d0dd5209 | 4623 | |
1923d2d6 JM |
4624 | Append_To (Result, |
4625 | Make_Object_Declaration (Loc, | |
4626 | Defining_Identifier => Predef_Prims_Ptr, | |
4627 | Constant_Present => True, | |
b16d9747 JM |
4628 | |
4629 | Object_Definition => | |
e4494292 | 4630 | New_Occurrence_Of (RTE (RE_Address), Loc), |
b16d9747 JM |
4631 | |
4632 | Expression => | |
1923d2d6 | 4633 | Make_Attribute_Reference (Loc, |
b16d9747 | 4634 | Prefix => |
1923d2d6 | 4635 | Make_Selected_Component (Loc, |
e4494292 | 4636 | Prefix => New_Occurrence_Of (Iface_DT, Loc), |
b16d9747 JM |
4637 | Selector_Name => |
4638 | New_Occurrence_Of | |
4639 | (RTE_Record_Component (RE_Predef_Prims), Loc)), | |
1923d2d6 JM |
4640 | Attribute_Name => Name_Address))); |
4641 | ||
f2cbd970 | 4642 | -- Remember entities containing dispatch tables |
1923d2d6 | 4643 | |
f2cbd970 JM |
4644 | Append_Elmt (Predef_Prims, DT_Decl); |
4645 | Append_Elmt (Iface_DT, DT_Decl); | |
d0dd5209 JM |
4646 | end Make_Secondary_DT; |
4647 | ||
bd5ed03a JM |
4648 | -------------------------------- |
4649 | -- Number_Of_Predefined_Prims -- | |
4650 | -------------------------------- | |
4651 | ||
4652 | function Number_Of_Predefined_Prims (Typ : Entity_Id) return Nat is | |
4653 | Nb_Predef_Prims : Nat := 0; | |
4654 | ||
4655 | begin | |
4656 | if not Generate_SCIL then | |
4657 | declare | |
4658 | Prim : Entity_Id; | |
4659 | Prim_Elmt : Elmt_Id; | |
4660 | Pos : Nat; | |
4661 | ||
4662 | begin | |
4663 | Prim_Elmt := First_Elmt (Primitive_Operations (Typ)); | |
4664 | while Present (Prim_Elmt) loop | |
4665 | Prim := Node (Prim_Elmt); | |
4666 | ||
4667 | if Is_Predefined_Dispatching_Operation (Prim) | |
4668 | and then not Is_Abstract_Subprogram (Prim) | |
4669 | then | |
4670 | Pos := UI_To_Int (DT_Position (Prim)); | |
4671 | ||
4672 | if Pos > Nb_Predef_Prims then | |
4673 | Nb_Predef_Prims := Pos; | |
4674 | end if; | |
4675 | end if; | |
4676 | ||
4677 | Next_Elmt (Prim_Elmt); | |
4678 | end loop; | |
4679 | end; | |
4680 | end if; | |
4681 | ||
4682 | pragma Assert (Nb_Predef_Prims <= Max_Predef_Prims); | |
4683 | return Nb_Predef_Prims; | |
4684 | end Number_Of_Predefined_Prims; | |
4685 | ||
d0dd5209 JM |
4686 | -- Local variables |
4687 | ||
d65a80fd HK |
4688 | Elab_Code : constant List_Id := New_List; |
4689 | Result : constant List_Id := New_List; | |
4690 | Tname : constant Name_Id := Chars (Typ); | |
4691 | ||
51ab2a39 JM |
4692 | -- When pragmas Discard_Names and No_Tagged_Streams simultaneously apply |
4693 | -- we initialize the Expanded_Name and the External_Tag of this tagged | |
4694 | -- type with an empty string. This is useful to avoid exposing entity | |
4695 | -- names at binary level. It can be done when both pragmas apply because | |
4696 | -- (1) Discard_Names allows initializing Expanded_Name with an | |
4697 | -- implementation defined value (Ada RM Section C.5 (7/2)). | |
4698 | -- (2) External_Tag (combined with Internal_Tag) is used for object | |
4699 | -- streaming and No_Tagged_Streams inhibits the generation of | |
4700 | -- streams. | |
4701 | ||
4702 | Discard_Names : constant Boolean := | |
4703 | Present (No_Tagged_Streams_Pragma (Typ)) | |
76f9c7f4 BD |
4704 | and then |
4705 | (Global_Discard_Names or else Einfo.Entities.Discard_Names (Typ)); | |
51ab2a39 | 4706 | |
d65a80fd HK |
4707 | -- The following name entries are used by Make_DT to generate a number |
4708 | -- of entities related to a tagged type. These entities may be generated | |
4709 | -- in a scope other than that of the tagged type declaration, and if | |
4710 | -- the entities for two tagged types with the same name happen to be | |
4711 | -- generated in the same scope, we have to take care to use different | |
4712 | -- names. This is achieved by means of a unique serial number appended | |
4713 | -- to each generated entity name. | |
4714 | ||
4715 | Name_DT : constant Name_Id := | |
4716 | New_External_Name (Tname, 'T', Suffix_Index => -1); | |
4717 | Name_Exname : constant Name_Id := | |
4718 | New_External_Name (Tname, 'E', Suffix_Index => -1); | |
4719 | Name_HT_Link : constant Name_Id := | |
4720 | New_External_Name (Tname, 'H', Suffix_Index => -1); | |
4721 | Name_Predef_Prims : constant Name_Id := | |
4722 | New_External_Name (Tname, 'R', Suffix_Index => -1); | |
4723 | Name_SSD : constant Name_Id := | |
4724 | New_External_Name (Tname, 'S', Suffix_Index => -1); | |
4725 | Name_TSD : constant Name_Id := | |
4726 | New_External_Name (Tname, 'B', Suffix_Index => -1); | |
4727 | ||
9057bd6a HK |
4728 | Saved_GM : constant Ghost_Mode_Type := Ghost_Mode; |
4729 | Saved_IGR : constant Node_Id := Ignored_Ghost_Region; | |
4730 | -- Save the Ghost-related attributes to restore on exit | |
f9a8f910 | 4731 | |
d0dd5209 | 4732 | AI : Elmt_Id; |
80b992ae | 4733 | AI_Tag_Elmt : Elmt_Id; |
e18d6a15 | 4734 | AI_Tag_Comp : Elmt_Id; |
d65a80fd | 4735 | DT : Entity_Id; |
0f4cb75c | 4736 | DT_Aggr_List : List_Id; |
e18d6a15 | 4737 | DT_Constr_List : List_Id; |
d0dd5209 | 4738 | DT_Ptr : Entity_Id; |
51ab2a39 | 4739 | Exname : Entity_Id; |
d65a80fd | 4740 | HT_Link : Entity_Id; |
d0dd5209 JM |
4741 | ITable : Node_Id; |
4742 | I_Depth : Nat := 0; | |
4743 | Iface_Table_Node : Node_Id; | |
4744 | Name_ITable : Name_Id; | |
d0dd5209 JM |
4745 | Nb_Prim : Nat := 0; |
4746 | New_Node : Node_Id; | |
d0dd5209 | 4747 | Num_Ifaces : Nat := 0; |
f2cbd970 | 4748 | Parent_Typ : Entity_Id; |
d65a80fd | 4749 | Predef_Prims : Entity_Id; |
d0dd5209 JM |
4750 | Prim : Entity_Id; |
4751 | Prim_Elmt : Elmt_Id; | |
4752 | Prim_Ops_Aggr_List : List_Id; | |
d65a80fd | 4753 | SSD : Entity_Id; |
d0dd5209 JM |
4754 | Suffix_Index : Int; |
4755 | Typ_Comps : Elist_Id; | |
4756 | Typ_Ifaces : Elist_Id; | |
d65a80fd | 4757 | TSD : Entity_Id; |
d0dd5209 JM |
4758 | TSD_Aggr_List : List_Id; |
4759 | TSD_Tags_List : List_Id; | |
b2e1beb3 | 4760 | |
d0dd5209 JM |
4761 | -- Start of processing for Make_DT |
4762 | ||
4763 | begin | |
b2e1beb3 | 4764 | pragma Assert (Is_Frozen (Typ)); |
d0dd5209 | 4765 | |
1af4455a HK |
4766 | -- The tagged type being processed may be subject to pragma Ghost. Set |
4767 | -- the mode now to ensure that any nodes generated during dispatch table | |
4768 | -- creation are properly marked as Ghost. | |
8636f52f | 4769 | |
f9a8f910 | 4770 | Set_Ghost_Mode (Typ); |
8636f52f | 4771 | |
b2e1beb3 | 4772 | -- Handle cases in which there is no need to build the dispatch table |
d0dd5209 | 4773 | |
b2e1beb3 ES |
4774 | if Has_Dispatch_Table (Typ) |
4775 | or else No (Access_Disp_Table (Typ)) | |
4776 | or else Is_CPP_Class (Typ) | |
4777 | then | |
d65a80fd | 4778 | goto Leave; |
d0dd5209 | 4779 | |
b2e1beb3 ES |
4780 | elsif No_Run_Time_Mode then |
4781 | Error_Msg_CRT ("tagged types", Typ); | |
d65a80fd | 4782 | goto Leave; |
d0dd5209 | 4783 | |
b2e1beb3 | 4784 | elsif not RTE_Available (RE_Tag) then |
d0dd5209 JM |
4785 | Append_To (Result, |
4786 | Make_Object_Declaration (Loc, | |
d65a80fd HK |
4787 | Defining_Identifier => |
4788 | Node (First_Elmt (Access_Disp_Table (Typ))), | |
e4494292 | 4789 | Object_Definition => New_Occurrence_Of (RTE (RE_Tag), Loc), |
d0dd5209 JM |
4790 | Constant_Present => True, |
4791 | Expression => | |
e18d6a15 | 4792 | Unchecked_Convert_To (RTE (RE_Tag), |
e4494292 | 4793 | New_Occurrence_Of (RTE (RE_Null_Address), Loc)))); |
d0dd5209 JM |
4794 | |
4795 | Analyze_List (Result, Suppress => All_Checks); | |
4796 | Error_Msg_CRT ("tagged types", Typ); | |
d65a80fd | 4797 | goto Leave; |
d0dd5209 JM |
4798 | end if; |
4799 | ||
b2e1beb3 | 4800 | -- Ensure that the value of Max_Predef_Prims defined in a-tags is |
110d0820 | 4801 | -- correct. Valid values are 10 under configurable runtime or 16 |
b2e1beb3 ES |
4802 | -- with full runtime. |
4803 | ||
4804 | if RTE_Available (RE_Interface_Data) then | |
110d0820 | 4805 | if Max_Predef_Prims /= 16 then |
b2e1beb3 | 4806 | Error_Msg_N ("run-time library configuration error", Typ); |
d65a80fd | 4807 | goto Leave; |
b2e1beb3 | 4808 | end if; |
d0dd5209 | 4809 | else |
110d0820 | 4810 | if Max_Predef_Prims /= 10 then |
b2e1beb3 ES |
4811 | Error_Msg_N ("run-time library configuration error", Typ); |
4812 | Error_Msg_CRT ("tagged types", Typ); | |
d65a80fd | 4813 | goto Leave; |
b2e1beb3 | 4814 | end if; |
d0dd5209 JM |
4815 | end if; |
4816 | ||
51ab2a39 JM |
4817 | DT := Make_Defining_Identifier (Loc, Name_DT); |
4818 | Exname := Make_Defining_Identifier (Loc, Name_Exname); | |
4819 | HT_Link := Make_Defining_Identifier (Loc, Name_HT_Link); | |
4820 | Predef_Prims := Make_Defining_Identifier (Loc, Name_Predef_Prims); | |
4821 | SSD := Make_Defining_Identifier (Loc, Name_SSD); | |
4822 | TSD := Make_Defining_Identifier (Loc, Name_TSD); | |
d65a80fd | 4823 | |
f2cbd970 JM |
4824 | -- Initialize Parent_Typ handling private types |
4825 | ||
4826 | Parent_Typ := Etype (Typ); | |
4827 | ||
4828 | if Present (Full_View (Parent_Typ)) then | |
4829 | Parent_Typ := Full_View (Parent_Typ); | |
4830 | end if; | |
4831 | ||
b2e1beb3 ES |
4832 | -- Ensure that all the primitives are frozen. This is only required when |
4833 | -- building static dispatch tables --- the primitives must be frozen to | |
4834 | -- be referenced (otherwise we have problems with the backend). It is | |
4835 | -- not a requirement with nonstatic dispatch tables because in this case | |
4836 | -- we generate now an empty dispatch table; the extra code required to | |
e18d6a15 | 4837 | -- register the primitives in the slots will be generated later --- when |
b2e1beb3 | 4838 | -- each primitive is frozen (see Freeze_Subprogram). |
d0dd5209 | 4839 | |
cefce34c | 4840 | if Building_Static_DT (Typ) then |
b2e1beb3 | 4841 | declare |
b63d61f7 AC |
4842 | Saved_FLLTT : constant Boolean := |
4843 | Freezing_Library_Level_Tagged_Type; | |
4844 | ||
4845 | Formal : Entity_Id; | |
4846 | Frnodes : List_Id; | |
361effb1 | 4847 | Prim : Entity_Id; |
b2e1beb3 | 4848 | Prim_Elmt : Elmt_Id; |
d0dd5209 | 4849 | |
b2e1beb3 ES |
4850 | begin |
4851 | Freezing_Library_Level_Tagged_Type := True; | |
361effb1 | 4852 | |
b2e1beb3 ES |
4853 | Prim_Elmt := First_Elmt (Primitive_Operations (Typ)); |
4854 | while Present (Prim_Elmt) loop | |
361effb1 | 4855 | Prim := Node (Prim_Elmt); |
c159409f | 4856 | Frnodes := Freeze_Entity (Prim, Typ); |
d0dd5209 | 4857 | |
b63d61f7 AC |
4858 | -- We disable this check for abstract subprograms, given that |
4859 | -- they cannot be called directly and thus the state of their | |
4860 | -- untagged formals is of no concern. The RM is unclear in any | |
4861 | -- case concerning the need for this check, and this topic may | |
4862 | -- go back to the ARG. | |
4863 | ||
4864 | if not Is_Abstract_Subprogram (Prim) then | |
4865 | Formal := First_Formal (Prim); | |
4866 | while Present (Formal) loop | |
4867 | Check_Premature_Freezing (Prim, Typ, Etype (Formal)); | |
4868 | Next_Formal (Formal); | |
b2e1beb3 ES |
4869 | end loop; |
4870 | ||
c0b11850 | 4871 | Check_Premature_Freezing (Prim, Typ, Etype (Prim)); |
b63d61f7 | 4872 | end if; |
b2e1beb3 ES |
4873 | |
4874 | if Present (Frnodes) then | |
4875 | Append_List_To (Result, Frnodes); | |
4876 | end if; | |
4877 | ||
4878 | Next_Elmt (Prim_Elmt); | |
4879 | end loop; | |
361effb1 | 4880 | |
b63d61f7 | 4881 | Freezing_Library_Level_Tagged_Type := Saved_FLLTT; |
b2e1beb3 ES |
4882 | end; |
4883 | end if; | |
d0dd5209 | 4884 | |
7225a479 | 4885 | if not Is_Interface (Typ) and then Has_Interfaces (Typ) then |
15529d0a PMR |
4886 | declare |
4887 | Cannot_Have_Null_Disc : Boolean := False; | |
7225a479 | 4888 | Dummy_Object_Typ : constant Entity_Id := Typ; |
15529d0a PMR |
4889 | Name_Dummy_Object : constant Name_Id := |
4890 | New_External_Name (Tname, | |
4891 | 'P', Suffix_Index => -1); | |
4892 | begin | |
4893 | Dummy_Object := Make_Defining_Identifier (Loc, Name_Dummy_Object); | |
4894 | ||
4895 | -- Define the extra object imported and constant to avoid linker | |
4896 | -- errors (since this object is never declared). Required because | |
4897 | -- we implement RM 13.3(19) for exported and imported (variable) | |
4898 | -- objects by making them volatile. | |
4899 | ||
4900 | Set_Is_Imported (Dummy_Object); | |
4901 | Set_Ekind (Dummy_Object, E_Constant); | |
4902 | Set_Is_True_Constant (Dummy_Object); | |
4903 | Set_Related_Type (Dummy_Object, Typ); | |
4904 | ||
4905 | -- The scope must be set now to call Get_External_Name | |
4906 | ||
4907 | Set_Scope (Dummy_Object, Current_Scope); | |
4908 | ||
4909 | Get_External_Name (Dummy_Object); | |
4910 | Set_Interface_Name (Dummy_Object, | |
4911 | Make_String_Literal (Loc, Strval => String_From_Name_Buffer)); | |
4912 | ||
4913 | -- Ensure proper Sprint output of this implicit importation | |
4914 | ||
4915 | Set_Is_Internal (Dummy_Object); | |
4916 | ||
7225a479 | 4917 | if not Has_Discriminants (Dummy_Object_Typ) then |
15529d0a PMR |
4918 | Append_To (Result, |
4919 | Make_Object_Declaration (Loc, | |
4920 | Defining_Identifier => Dummy_Object, | |
4921 | Constant_Present => True, | |
7225a479 JM |
4922 | Object_Definition => New_Occurrence_Of |
4923 | (Dummy_Object_Typ, Loc))); | |
15529d0a PMR |
4924 | else |
4925 | declare | |
4926 | Constr_List : constant List_Id := New_List; | |
4927 | Discrim : Node_Id; | |
4928 | ||
4929 | begin | |
7225a479 | 4930 | Discrim := First_Discriminant (Dummy_Object_Typ); |
15529d0a PMR |
4931 | while Present (Discrim) loop |
4932 | if Is_Discrete_Type (Etype (Discrim)) then | |
4933 | Append_To (Constr_List, | |
4934 | Make_Attribute_Reference (Loc, | |
7f5e671b PMR |
4935 | Prefix => |
4936 | New_Occurrence_Of (Etype (Discrim), Loc), | |
15529d0a PMR |
4937 | Attribute_Name => Name_First)); |
4938 | ||
4939 | else | |
4940 | pragma Assert (Is_Access_Type (Etype (Discrim))); | |
4941 | Cannot_Have_Null_Disc := | |
4942 | Cannot_Have_Null_Disc | |
4943 | or else Can_Never_Be_Null (Etype (Discrim)); | |
4944 | Append_To (Constr_List, Make_Null (Loc)); | |
4945 | end if; | |
4946 | ||
4947 | Next_Discriminant (Discrim); | |
4948 | end loop; | |
4949 | ||
4950 | Append_To (Result, | |
4951 | Make_Object_Declaration (Loc, | |
4952 | Defining_Identifier => Dummy_Object, | |
4953 | Constant_Present => True, | |
4954 | Object_Definition => | |
4955 | Make_Subtype_Indication (Loc, | |
7225a479 JM |
4956 | Subtype_Mark => |
4957 | New_Occurrence_Of (Dummy_Object_Typ, Loc), | |
15529d0a PMR |
4958 | Constraint => |
4959 | Make_Index_Or_Discriminant_Constraint (Loc, | |
4960 | Constraints => Constr_List)))); | |
4961 | end; | |
4962 | end if; | |
4963 | ||
4964 | -- Given that the dummy object will not be declared at run time, | |
4965 | -- analyze its declaration with expansion disabled and warnings | |
4966 | -- and error messages ignored. | |
4967 | ||
4968 | Expander_Mode_Save_And_Set (False); | |
4969 | Ignore_Errors_Enable := Ignore_Errors_Enable + 1; | |
4970 | Analyze (Last (Result), Suppress => All_Checks); | |
4971 | Ignore_Errors_Enable := Ignore_Errors_Enable - 1; | |
4972 | Expander_Mode_Restore; | |
4973 | end; | |
4974 | end if; | |
4975 | ||
b2e1beb3 ES |
4976 | -- Ada 2005 (AI-251): Build the secondary dispatch tables |
4977 | ||
ce2b6ba5 | 4978 | if Has_Interfaces (Typ) then |
b2e1beb3 ES |
4979 | Collect_Interface_Components (Typ, Typ_Comps); |
4980 | ||
b16d9747 JM |
4981 | -- Each secondary dispatch table is assigned an unique positive |
4982 | -- suffix index; such value also corresponds with the location of | |
4983 | -- its entity in the Dispatch_Table_Wrappers list (see Make_Tags). | |
4984 | ||
4985 | -- Note: This value must be kept sync with the Suffix_Index values | |
4986 | -- generated by Make_Tags | |
4987 | ||
4988 | Suffix_Index := 1; | |
1923d2d6 JM |
4989 | AI_Tag_Elmt := |
4990 | Next_Elmt (Next_Elmt (First_Elmt (Access_Disp_Table (Typ)))); | |
b2e1beb3 ES |
4991 | |
4992 | AI_Tag_Comp := First_Elmt (Typ_Comps); | |
4993 | while Present (AI_Tag_Comp) loop | |
cefce34c | 4994 | pragma Assert (Has_Suffix (Node (AI_Tag_Elmt), 'P')); |
80b992ae HK |
4995 | |
4996 | -- Build the secondary table containing pointers to thunks | |
4997 | ||
b2e1beb3 | 4998 | Make_Secondary_DT |
6782b1ef | 4999 | (Typ => Typ, |
7f5e671b PMR |
5000 | Iface => |
5001 | Base_Type (Related_Type (Node (AI_Tag_Comp))), | |
15529d0a | 5002 | Iface_Comp => Node (AI_Tag_Comp), |
6782b1ef | 5003 | Suffix_Index => Suffix_Index, |
7f5e671b PMR |
5004 | Num_Iface_Prims => |
5005 | UI_To_Int (DT_Entry_Count (Node (AI_Tag_Comp))), | |
6782b1ef | 5006 | Iface_DT_Ptr => Node (AI_Tag_Elmt), |
1923d2d6 | 5007 | Predef_Prims_Ptr => Node (Next_Elmt (AI_Tag_Elmt)), |
6782b1ef AC |
5008 | Build_Thunks => True, |
5009 | Result => Result); | |
80b992ae | 5010 | |
cefce34c JM |
5011 | -- Skip secondary dispatch table referencing thunks to predefined |
5012 | -- primitives. | |
1923d2d6 | 5013 | |
b16d9747 | 5014 | Next_Elmt (AI_Tag_Elmt); |
cefce34c JM |
5015 | pragma Assert (Has_Suffix (Node (AI_Tag_Elmt), 'Y')); |
5016 | ||
5017 | -- Secondary dispatch table referencing user-defined primitives | |
5018 | -- covered by this interface. | |
5019 | ||
1923d2d6 | 5020 | Next_Elmt (AI_Tag_Elmt); |
cefce34c | 5021 | pragma Assert (Has_Suffix (Node (AI_Tag_Elmt), 'D')); |
1923d2d6 | 5022 | |
8fc789c8 | 5023 | -- Build the secondary table containing pointers to primitives |
80b992ae HK |
5024 | -- (used to give support to Generic Dispatching Constructors). |
5025 | ||
5026 | Make_Secondary_DT | |
cefce34c JM |
5027 | (Typ => Typ, |
5028 | Iface => Base_Type | |
5029 | (Related_Type (Node (AI_Tag_Comp))), | |
15529d0a | 5030 | Iface_Comp => Node (AI_Tag_Comp), |
cefce34c JM |
5031 | Suffix_Index => -1, |
5032 | Num_Iface_Prims => UI_To_Int | |
5033 | (DT_Entry_Count (Node (AI_Tag_Comp))), | |
5034 | Iface_DT_Ptr => Node (AI_Tag_Elmt), | |
5035 | Predef_Prims_Ptr => Node (Next_Elmt (AI_Tag_Elmt)), | |
5036 | Build_Thunks => False, | |
5037 | Result => Result); | |
5038 | ||
5039 | -- Skip secondary dispatch table referencing predefined primitives | |
1923d2d6 | 5040 | |
b16d9747 | 5041 | Next_Elmt (AI_Tag_Elmt); |
cefce34c | 5042 | pragma Assert (Has_Suffix (Node (AI_Tag_Elmt), 'Z')); |
1923d2d6 | 5043 | |
b2e1beb3 | 5044 | Suffix_Index := Suffix_Index + 1; |
cefce34c | 5045 | Next_Elmt (AI_Tag_Elmt); |
b2e1beb3 ES |
5046 | Next_Elmt (AI_Tag_Comp); |
5047 | end loop; | |
5048 | end if; | |
d0dd5209 | 5049 | |
afbcdf5e | 5050 | -- Get the _tag entity and number of primitives of its dispatch table |
d0dd5209 | 5051 | |
e18d6a15 JM |
5052 | DT_Ptr := Node (First_Elmt (Access_Disp_Table (Typ))); |
5053 | Nb_Prim := UI_To_Int (DT_Entry_Count (First_Tag_Component (Typ))); | |
d0dd5209 | 5054 | |
078b1a5f AC |
5055 | if Generate_SCIL then |
5056 | Nb_Prim := 0; | |
5057 | end if; | |
5058 | ||
5b7dd52d JM |
5059 | Set_Is_Statically_Allocated (DT, Is_Library_Level_Tagged_Type (Typ)); |
5060 | Set_Is_Statically_Allocated (SSD, Is_Library_Level_Tagged_Type (Typ)); | |
5061 | Set_Is_Statically_Allocated (TSD, Is_Library_Level_Tagged_Type (Typ)); | |
5062 | Set_Is_Statically_Allocated (Predef_Prims, | |
5063 | Is_Library_Level_Tagged_Type (Typ)); | |
d0dd5209 JM |
5064 | |
5065 | -- In case of locally defined tagged type we declare the object | |
8fc789c8 | 5066 | -- containing the dispatch table by means of a variable. Its |
d0dd5209 JM |
5067 | -- initialization is done later by means of an assignment. This is |
5068 | -- required to generate its External_Tag. | |
5069 | ||
e18d6a15 | 5070 | if not Building_Static_DT (Typ) then |
d0dd5209 JM |
5071 | |
5072 | -- Generate: | |
5073 | -- DT : No_Dispatch_Table_Wrapper; | |
5074 | -- DT_Ptr : Tag := !Tag (DT.NDT_Prims_Ptr'Address); | |
5075 | ||
e18d6a15 | 5076 | if not Has_DT (Typ) then |
d0dd5209 JM |
5077 | Append_To (Result, |
5078 | Make_Object_Declaration (Loc, | |
5079 | Defining_Identifier => DT, | |
5080 | Aliased_Present => True, | |
5081 | Constant_Present => False, | |
5082 | Object_Definition => | |
e4494292 | 5083 | New_Occurrence_Of |
d0dd5209 JM |
5084 | (RTE (RE_No_Dispatch_Table_Wrapper), Loc))); |
5085 | ||
5086 | Append_To (Result, | |
5087 | Make_Object_Declaration (Loc, | |
5088 | Defining_Identifier => DT_Ptr, | |
e4494292 | 5089 | Object_Definition => New_Occurrence_Of (RTE (RE_Tag), Loc), |
d0dd5209 JM |
5090 | Constant_Present => True, |
5091 | Expression => | |
e18d6a15 | 5092 | Unchecked_Convert_To (RTE (RE_Tag), |
d0dd5209 | 5093 | Make_Attribute_Reference (Loc, |
6782b1ef | 5094 | Prefix => |
d0dd5209 | 5095 | Make_Selected_Component (Loc, |
6782b1ef AC |
5096 | Prefix => New_Occurrence_Of (DT, Loc), |
5097 | Selector_Name => | |
5098 | New_Occurrence_Of | |
5099 | (RTE_Record_Component (RE_NDT_Prims_Ptr), Loc)), | |
d0dd5209 JM |
5100 | Attribute_Name => Name_Address)))); |
5101 | ||
d151d6a3 AC |
5102 | Set_Is_Statically_Allocated (DT_Ptr, |
5103 | Is_Library_Level_Tagged_Type (Typ)); | |
5104 | ||
a50790d1 JM |
5105 | -- Generate the SCIL node for the previous object declaration |
5106 | -- because it has a tag initialization. | |
5107 | ||
81d93365 | 5108 | if Generate_SCIL then |
327503f1 JM |
5109 | New_Node := |
5110 | Make_SCIL_Dispatch_Table_Tag_Init (Sloc (Last (Result))); | |
327503f1 | 5111 | Set_SCIL_Entity (New_Node, Typ); |
7665e4bd | 5112 | Set_SCIL_Node (Last (Result), New_Node); |
078b1a5f | 5113 | |
d65a80fd | 5114 | goto Leave_SCIL; |
078b1a5f AC |
5115 | |
5116 | -- Gnat2scil has its own implementation of dispatch tables, | |
5117 | -- different than what is being implemented here. Generating | |
5118 | -- further dispatch table initialization code would just | |
5119 | -- cause gnat2scil to generate useless Scil which CodePeer | |
5120 | -- would waste time and space analyzing, so we skip it. | |
81d93365 AC |
5121 | end if; |
5122 | ||
d0dd5209 JM |
5123 | -- Generate: |
5124 | -- DT : Dispatch_Table_Wrapper (Nb_Prim); | |
d0dd5209 JM |
5125 | -- DT_Ptr : Tag := !Tag (DT.Prims_Ptr'Address); |
5126 | ||
5127 | else | |
5128 | -- If the tagged type has no primitives we add a dummy slot | |
5129 | -- whose address will be the tag of this type. | |
5130 | ||
5131 | if Nb_Prim = 0 then | |
5132 | DT_Constr_List := | |
5133 | New_List (Make_Integer_Literal (Loc, 1)); | |
5134 | else | |
5135 | DT_Constr_List := | |
5136 | New_List (Make_Integer_Literal (Loc, Nb_Prim)); | |
5137 | end if; | |
5138 | ||
5139 | Append_To (Result, | |
5140 | Make_Object_Declaration (Loc, | |
5141 | Defining_Identifier => DT, | |
5142 | Aliased_Present => True, | |
5143 | Constant_Present => False, | |
5144 | Object_Definition => | |
5145 | Make_Subtype_Indication (Loc, | |
5146 | Subtype_Mark => | |
e4494292 | 5147 | New_Occurrence_Of (RTE (RE_Dispatch_Table_Wrapper), Loc), |
6782b1ef AC |
5148 | Constraint => |
5149 | Make_Index_Or_Discriminant_Constraint (Loc, | |
5150 | Constraints => DT_Constr_List)))); | |
d0dd5209 | 5151 | |
d0dd5209 JM |
5152 | Append_To (Result, |
5153 | Make_Object_Declaration (Loc, | |
5154 | Defining_Identifier => DT_Ptr, | |
e4494292 | 5155 | Object_Definition => New_Occurrence_Of (RTE (RE_Tag), Loc), |
d0dd5209 JM |
5156 | Constant_Present => True, |
5157 | Expression => | |
e18d6a15 | 5158 | Unchecked_Convert_To (RTE (RE_Tag), |
d0dd5209 | 5159 | Make_Attribute_Reference (Loc, |
6782b1ef | 5160 | Prefix => |
d0dd5209 | 5161 | Make_Selected_Component (Loc, |
6782b1ef AC |
5162 | Prefix => New_Occurrence_Of (DT, Loc), |
5163 | Selector_Name => | |
5164 | New_Occurrence_Of | |
5165 | (RTE_Record_Component (RE_Prims_Ptr), Loc)), | |
d0dd5209 | 5166 | Attribute_Name => Name_Address)))); |
1923d2d6 | 5167 | |
d151d6a3 AC |
5168 | Set_Is_Statically_Allocated (DT_Ptr, |
5169 | Is_Library_Level_Tagged_Type (Typ)); | |
5170 | ||
a50790d1 JM |
5171 | -- Generate the SCIL node for the previous object declaration |
5172 | -- because it has a tag initialization. | |
97cb64f0 | 5173 | |
81d93365 | 5174 | if Generate_SCIL then |
327503f1 JM |
5175 | New_Node := |
5176 | Make_SCIL_Dispatch_Table_Tag_Init (Sloc (Last (Result))); | |
327503f1 | 5177 | Set_SCIL_Entity (New_Node, Typ); |
7665e4bd | 5178 | Set_SCIL_Node (Last (Result), New_Node); |
078b1a5f | 5179 | |
d65a80fd | 5180 | goto Leave_SCIL; |
078b1a5f AC |
5181 | |
5182 | -- Gnat2scil has its own implementation of dispatch tables, | |
5183 | -- different than what is being implemented here. Generating | |
5184 | -- further dispatch table initialization code would just | |
5185 | -- cause gnat2scil to generate useless Scil which CodePeer | |
5186 | -- would waste time and space analyzing, so we skip it. | |
81d93365 AC |
5187 | end if; |
5188 | ||
1923d2d6 JM |
5189 | Append_To (Result, |
5190 | Make_Object_Declaration (Loc, | |
5191 | Defining_Identifier => | |
5192 | Node (Next_Elmt (First_Elmt (Access_Disp_Table (Typ)))), | |
5193 | Constant_Present => True, | |
6782b1ef AC |
5194 | Object_Definition => |
5195 | New_Occurrence_Of (RTE (RE_Address), Loc), | |
3d581777 | 5196 | Expression => |
1923d2d6 | 5197 | Make_Attribute_Reference (Loc, |
6782b1ef | 5198 | Prefix => |
1923d2d6 | 5199 | Make_Selected_Component (Loc, |
6782b1ef AC |
5200 | Prefix => New_Occurrence_Of (DT, Loc), |
5201 | Selector_Name => | |
5202 | New_Occurrence_Of | |
5203 | (RTE_Record_Component (RE_Predef_Prims), Loc)), | |
1923d2d6 | 5204 | Attribute_Name => Name_Address))); |
d0dd5209 JM |
5205 | end if; |
5206 | end if; | |
5207 | ||
51ab2a39 | 5208 | -- Generate: Expanded_Name : constant String := ""; |
b00baef5 | 5209 | |
51ab2a39 | 5210 | if Discard_Names then |
b00baef5 JM |
5211 | Append_To (Result, |
5212 | Make_Object_Declaration (Loc, | |
51ab2a39 | 5213 | Defining_Identifier => Exname, |
b00baef5 JM |
5214 | Constant_Present => True, |
5215 | Object_Definition => New_Occurrence_Of (Standard_String, Loc), | |
5216 | Expression => | |
5217 | Make_String_Literal (Loc, ""))); | |
5218 | ||
51ab2a39 | 5219 | -- Generate: Exname : constant String := full_qualified_name (typ); |
dee4682a JM |
5220 | -- The type itself may be an anonymous parent type, so use the first |
5221 | -- subtype to have a user-recognizable name. | |
10b93b2e | 5222 | |
b00baef5 JM |
5223 | else |
5224 | Append_To (Result, | |
5225 | Make_Object_Declaration (Loc, | |
51ab2a39 | 5226 | Defining_Identifier => Exname, |
b00baef5 JM |
5227 | Constant_Present => True, |
5228 | Object_Definition => New_Occurrence_Of (Standard_String, Loc), | |
5229 | Expression => | |
5230 | Make_String_Literal (Loc, | |
5231 | Fully_Qualified_Name_String (First_Subtype (Typ))))); | |
5232 | end if; | |
5233 | ||
51ab2a39 JM |
5234 | Set_Is_Statically_Allocated (Exname); |
5235 | Set_Is_True_Constant (Exname); | |
e18d6a15 | 5236 | |
6e818918 JM |
5237 | -- Declare the object used by Ada.Tags.Register_Tag |
5238 | ||
5239 | if RTE_Available (RE_Register_Tag) then | |
5240 | Append_To (Result, | |
5241 | Make_Object_Declaration (Loc, | |
5242 | Defining_Identifier => HT_Link, | |
6214b83b PMR |
5243 | Object_Definition => New_Occurrence_Of (RTE (RE_Tag), Loc), |
5244 | Expression => New_Occurrence_Of (RTE (RE_No_Tag), Loc))); | |
6e818918 JM |
5245 | end if; |
5246 | ||
d0dd5209 JM |
5247 | -- Generate code to create the storage for the type specific data object |
5248 | -- with enough space to store the tags of the ancestors plus the tags | |
5249 | -- of all the implemented interfaces (as described in a-tags.adb). | |
5250 | ||
5251 | -- TSD : Type_Specific_Data (I_Depth) := | |
5252 | -- (Idepth => I_Depth, | |
5253 | -- Access_Level => Type_Access_Level (Typ), | |
6bed26b5 | 5254 | -- Alignment => Typ'Alignment, |
51ab2a39 JM |
5255 | -- Expanded_Name => Cstring_Ptr!(Exname'Address)) |
5256 | -- External_Tag => Cstring_Ptr!(Exname'Address)) | |
6e818918 | 5257 | -- HT_Link => HT_Link'Address, |
d0dd5209 | 5258 | -- Transportable => <<boolean-value>>, |
b6e6a4e3 | 5259 | -- Is_Abstract => <<boolean-value>>, |
df3e68b1 | 5260 | -- Needs_Finalization => <<boolean-value>>, |
ee1a7572 AC |
5261 | -- [ Size_Func => Size_Prim'Access, ] |
5262 | -- [ Interfaces_Table => <<access-value>>, ] | |
e18d6a15 | 5263 | -- [ SSD => SSD_Table'Address ] |
d0dd5209 JM |
5264 | -- Tags_Table => (0 => null, |
5265 | -- 1 => Parent'Tag | |
5266 | -- ...); | |
d0dd5209 JM |
5267 | |
5268 | TSD_Aggr_List := New_List; | |
5269 | ||
5270 | -- Idepth: Count ancestors to compute the inheritance depth. For private | |
5271 | -- extensions, always go to the full view in order to compute the real | |
5272 | -- inheritance depth. | |
5273 | ||
5274 | declare | |
5275 | Current_Typ : Entity_Id; | |
5276 | Parent_Typ : Entity_Id; | |
5277 | ||
5278 | begin | |
5279 | I_Depth := 0; | |
5280 | Current_Typ := Typ; | |
5281 | loop | |
5282 | Parent_Typ := Etype (Current_Typ); | |
5283 | ||
5284 | if Is_Private_Type (Parent_Typ) then | |
5285 | Parent_Typ := Full_View (Base_Type (Parent_Typ)); | |
5286 | end if; | |
5287 | ||
5288 | exit when Parent_Typ = Current_Typ; | |
5289 | ||
5290 | I_Depth := I_Depth + 1; | |
5291 | Current_Typ := Parent_Typ; | |
5292 | end loop; | |
5293 | end; | |
5294 | ||
5295 | Append_To (TSD_Aggr_List, | |
b2e1beb3 | 5296 | Make_Integer_Literal (Loc, I_Depth)); |
d0dd5209 JM |
5297 | |
5298 | -- Access_Level | |
5299 | ||
5300 | Append_To (TSD_Aggr_List, | |
b2e1beb3 | 5301 | Make_Integer_Literal (Loc, Type_Access_Level (Typ))); |
d0dd5209 | 5302 | |
6bed26b5 AC |
5303 | -- Alignment |
5304 | ||
5305 | -- For CPP types we cannot rely on the value of 'Alignment provided | |
5306 | -- by the backend to initialize this TSD field. | |
5307 | ||
5308 | if Convention (Typ) = Convention_CPP | |
5309 | or else Is_CPP_Class (Root_Type (Typ)) | |
5310 | then | |
5311 | Append_To (TSD_Aggr_List, | |
5312 | Make_Integer_Literal (Loc, 0)); | |
5313 | else | |
5314 | Append_To (TSD_Aggr_List, | |
5315 | Make_Attribute_Reference (Loc, | |
6782b1ef | 5316 | Prefix => New_Occurrence_Of (Typ, Loc), |
6bed26b5 AC |
5317 | Attribute_Name => Name_Alignment)); |
5318 | end if; | |
5319 | ||
d0dd5209 JM |
5320 | -- Expanded_Name |
5321 | ||
5322 | Append_To (TSD_Aggr_List, | |
b2e1beb3 ES |
5323 | Unchecked_Convert_To (RTE (RE_Cstring_Ptr), |
5324 | Make_Attribute_Reference (Loc, | |
51ab2a39 | 5325 | Prefix => New_Occurrence_Of (Exname, Loc), |
b2e1beb3 | 5326 | Attribute_Name => Name_Address))); |
d0dd5209 JM |
5327 | |
5328 | -- External_Tag of a local tagged type | |
5329 | ||
b2e1beb3 | 5330 | -- <typ>A : constant String := |
d0dd5209 JM |
5331 | -- "Internal tag at 16#tag-addr#: <full-name-of-typ>"; |
5332 | ||
5333 | -- The reason we generate this strange name is that we do not want to | |
5334 | -- enter local tagged types in the global hash table used to compute | |
5335 | -- the Internal_Tag attribute for two reasons: | |
5336 | ||
5337 | -- 1. It is hard to avoid a tasking race condition for entering the | |
5338 | -- entry into the hash table. | |
5339 | ||
5340 | -- 2. It would cause a storage leak, unless we rig up considerable | |
5341 | -- mechanism to remove the entry from the hash table on exit. | |
5342 | ||
5343 | -- So what we do is to generate the above external tag name, where the | |
5344 | -- hex address is the address of the local dispatch table (i.e. exactly | |
5345 | -- the value we want if Internal_Tag is computed from this string). | |
5346 | ||
5347 | -- Of course this value will only be valid if the tagged type is still | |
5348 | -- in scope, but it clearly must be erroneous to compute the internal | |
a90bd866 | 5349 | -- tag of a tagged type that is out of scope. |
d0dd5209 | 5350 | |
b2e1beb3 ES |
5351 | -- We don't do this processing if an explicit external tag has been |
5352 | -- specified. That's an odd case for which we have already issued a | |
5353 | -- warning, where we will not be able to compute the internal tag. | |
5354 | ||
51ab2a39 JM |
5355 | if not Discard_Names |
5356 | and then not Is_Library_Level_Entity (Typ) | |
b2e1beb3 ES |
5357 | and then not Has_External_Tag_Rep_Clause (Typ) |
5358 | then | |
d0dd5209 | 5359 | declare |
6782b1ef AC |
5360 | Exname : constant Entity_Id := |
5361 | Make_Defining_Identifier (Loc, | |
5362 | Chars => New_External_Name (Tname, 'A')); | |
5363 | Full_Name : constant String_Id := | |
afbcdf5e | 5364 | Fully_Qualified_Name_String (First_Subtype (Typ)); |
6782b1ef AC |
5365 | Str1_Id : String_Id; |
5366 | Str2_Id : String_Id; | |
d0dd5209 JM |
5367 | |
5368 | begin | |
5369 | -- Generate: | |
b2e1beb3 | 5370 | -- Str1 = "Internal tag at 16#"; |
d0dd5209 JM |
5371 | |
5372 | Start_String; | |
5373 | Store_String_Chars ("Internal tag at 16#"); | |
5374 | Str1_Id := End_String; | |
5375 | ||
5376 | -- Generate: | |
b2e1beb3 | 5377 | -- Str2 = "#: <type-full-name>"; |
d0dd5209 JM |
5378 | |
5379 | Start_String; | |
5380 | Store_String_Chars ("#: "); | |
d0dd5209 | 5381 | Store_String_Chars (Full_Name); |
b2e1beb3 | 5382 | Str2_Id := End_String; |
d0dd5209 JM |
5383 | |
5384 | -- Generate: | |
5385 | -- Exname : constant String := | |
b2e1beb3 | 5386 | -- Str1 & Address_Image (Tag) & Str2; |
d0dd5209 JM |
5387 | |
5388 | if RTE_Available (RE_Address_Image) then | |
5389 | Append_To (Result, | |
5390 | Make_Object_Declaration (Loc, | |
5391 | Defining_Identifier => Exname, | |
5392 | Constant_Present => True, | |
e4494292 | 5393 | Object_Definition => New_Occurrence_Of |
d0dd5209 JM |
5394 | (Standard_String, Loc), |
5395 | Expression => | |
5396 | Make_Op_Concat (Loc, | |
6782b1ef | 5397 | Left_Opnd => Make_String_Literal (Loc, Str1_Id), |
d0dd5209 JM |
5398 | Right_Opnd => |
5399 | Make_Op_Concat (Loc, | |
6782b1ef | 5400 | Left_Opnd => |
d0dd5209 JM |
5401 | Make_Function_Call (Loc, |
5402 | Name => | |
e4494292 | 5403 | New_Occurrence_Of |
d0dd5209 JM |
5404 | (RTE (RE_Address_Image), Loc), |
5405 | Parameter_Associations => New_List ( | |
5406 | Unchecked_Convert_To (RTE (RE_Address), | |
e4494292 | 5407 | New_Occurrence_Of (DT_Ptr, Loc)))), |
d0dd5209 | 5408 | Right_Opnd => |
b2e1beb3 ES |
5409 | Make_String_Literal (Loc, Str2_Id))))); |
5410 | ||
b00baef5 JM |
5411 | -- Generate: |
5412 | -- Exname : constant String := Str1 & Str2; | |
5413 | ||
d0dd5209 JM |
5414 | else |
5415 | Append_To (Result, | |
5416 | Make_Object_Declaration (Loc, | |
5417 | Defining_Identifier => Exname, | |
5418 | Constant_Present => True, | |
6782b1ef AC |
5419 | Object_Definition => |
5420 | New_Occurrence_Of (Standard_String, Loc), | |
5421 | Expression => | |
d0dd5209 | 5422 | Make_Op_Concat (Loc, |
6782b1ef AC |
5423 | Left_Opnd => Make_String_Literal (Loc, Str1_Id), |
5424 | Right_Opnd => Make_String_Literal (Loc, Str2_Id)))); | |
d0dd5209 JM |
5425 | end if; |
5426 | ||
5427 | New_Node := | |
5428 | Unchecked_Convert_To (RTE (RE_Cstring_Ptr), | |
5429 | Make_Attribute_Reference (Loc, | |
6782b1ef | 5430 | Prefix => New_Occurrence_Of (Exname, Loc), |
d0dd5209 JM |
5431 | Attribute_Name => Name_Address)); |
5432 | end; | |
5433 | ||
5434 | -- External tag of a library-level tagged type: Check for a definition | |
5435 | -- of External_Tag. The clause is considered only if it applies to this | |
5436 | -- specific tagged type, as opposed to one of its ancestors. | |
f2cbd970 JM |
5437 | -- If the type is an unconstrained type extension, we are building the |
5438 | -- dispatch table of its anonymous base type, so the external tag, if | |
46fe0142 AC |
5439 | -- any was specified, must be retrieved from the first subtype. Go to |
5440 | -- the full view in case the clause is in the private part. | |
d0dd5209 JM |
5441 | |
5442 | else | |
5443 | declare | |
f2cbd970 | 5444 | Def : constant Node_Id := Get_Attribute_Definition_Clause |
46fe0142 | 5445 | (Underlying_Type (First_Subtype (Typ)), |
f2cbd970 JM |
5446 | Attribute_External_Tag); |
5447 | ||
d0dd5209 JM |
5448 | Old_Val : String_Id; |
5449 | New_Val : String_Id; | |
5450 | E : Entity_Id; | |
5451 | ||
5452 | begin | |
5453 | if not Present (Def) | |
f2cbd970 | 5454 | or else Entity (Name (Def)) /= First_Subtype (Typ) |
d0dd5209 JM |
5455 | then |
5456 | New_Node := | |
5457 | Unchecked_Convert_To (RTE (RE_Cstring_Ptr), | |
5458 | Make_Attribute_Reference (Loc, | |
51ab2a39 | 5459 | Prefix => New_Occurrence_Of (Exname, Loc), |
d0dd5209 JM |
5460 | Attribute_Name => Name_Address)); |
5461 | else | |
5462 | Old_Val := Strval (Expr_Value_S (Expression (Def))); | |
5463 | ||
b2e1beb3 | 5464 | -- For the rep clause "for <typ>'external_tag use y" generate: |
d0dd5209 | 5465 | |
b2e1beb3 ES |
5466 | -- <typ>A : constant string := y; |
5467 | -- | |
5468 | -- <typ>A'Address is used to set the External_Tag component | |
5469 | -- of the TSD | |
d0dd5209 JM |
5470 | |
5471 | -- Create a new nul terminated string if it is not already | |
5472 | ||
5473 | if String_Length (Old_Val) > 0 | |
5474 | and then | |
5475 | Get_String_Char (Old_Val, String_Length (Old_Val)) = 0 | |
5476 | then | |
5477 | New_Val := Old_Val; | |
5478 | else | |
5479 | Start_String (Old_Val); | |
5480 | Store_String_Char (Get_Char_Code (ASCII.NUL)); | |
5481 | New_Val := End_String; | |
5482 | end if; | |
5483 | ||
5484 | E := Make_Defining_Identifier (Loc, | |
5485 | New_External_Name (Chars (Typ), 'A')); | |
5486 | ||
5487 | Append_To (Result, | |
5488 | Make_Object_Declaration (Loc, | |
5489 | Defining_Identifier => E, | |
5490 | Constant_Present => True, | |
5491 | Object_Definition => | |
e4494292 | 5492 | New_Occurrence_Of (Standard_String, Loc), |
d0dd5209 JM |
5493 | Expression => |
5494 | Make_String_Literal (Loc, New_Val))); | |
5495 | ||
5496 | New_Node := | |
5497 | Unchecked_Convert_To (RTE (RE_Cstring_Ptr), | |
5498 | Make_Attribute_Reference (Loc, | |
6782b1ef | 5499 | Prefix => New_Occurrence_Of (E, Loc), |
d0dd5209 JM |
5500 | Attribute_Name => Name_Address)); |
5501 | end if; | |
5502 | end; | |
5503 | end if; | |
5504 | ||
b2e1beb3 | 5505 | Append_To (TSD_Aggr_List, New_Node); |
d0dd5209 JM |
5506 | |
5507 | -- HT_Link | |
5508 | ||
6e818918 JM |
5509 | if RTE_Available (RE_Register_Tag) then |
5510 | Append_To (TSD_Aggr_List, | |
5511 | Unchecked_Convert_To (RTE (RE_Tag_Ptr), | |
5512 | Make_Attribute_Reference (Loc, | |
6782b1ef | 5513 | Prefix => New_Occurrence_Of (HT_Link, Loc), |
6e818918 | 5514 | Attribute_Name => Name_Address))); |
5612989e PMR |
5515 | |
5516 | elsif RTE_Record_Component_Available (RE_HT_Link) then | |
6e818918 JM |
5517 | Append_To (TSD_Aggr_List, |
5518 | Unchecked_Convert_To (RTE (RE_Tag_Ptr), | |
e4494292 | 5519 | New_Occurrence_Of (RTE (RE_Null_Address), Loc))); |
6e818918 | 5520 | end if; |
d0dd5209 JM |
5521 | |
5522 | -- Transportable: Set for types that can be used in remote calls | |
5523 | -- with respect to E.4(18) legality rules. | |
5524 | ||
b2e1beb3 ES |
5525 | declare |
5526 | Transportable : Entity_Id; | |
d0dd5209 | 5527 | |
b2e1beb3 ES |
5528 | begin |
5529 | Transportable := | |
5530 | Boolean_Literals | |
5531 | (Is_Pure (Typ) | |
5532 | or else Is_Shared_Passive (Typ) | |
5533 | or else | |
5534 | ((Is_Remote_Types (Typ) | |
6782b1ef | 5535 | or else Is_Remote_Call_Interface (Typ)) |
b2e1beb3 ES |
5536 | and then Original_View_In_Visible_Part (Typ)) |
5537 | or else not Comes_From_Source (Typ)); | |
5538 | ||
5539 | Append_To (TSD_Aggr_List, | |
5540 | New_Occurrence_Of (Transportable, Loc)); | |
5541 | end; | |
d0dd5209 | 5542 | |
b6e6a4e3 AC |
5543 | -- Is_Abstract (Ada 2012: AI05-0173). This functionality is not |
5544 | -- available in the HIE runtime. | |
0eb4c1a7 | 5545 | |
b6e6a4e3 | 5546 | if RTE_Record_Component_Available (RE_Is_Abstract) then |
0eb4c1a7 | 5547 | declare |
b6e6a4e3 | 5548 | Is_Abstract : Entity_Id; |
0eb4c1a7 | 5549 | begin |
b6e6a4e3 | 5550 | Is_Abstract := Boolean_Literals (Is_Abstract_Type (Typ)); |
0eb4c1a7 | 5551 | Append_To (TSD_Aggr_List, |
b6e6a4e3 | 5552 | New_Occurrence_Of (Is_Abstract, Loc)); |
0eb4c1a7 AC |
5553 | end; |
5554 | end if; | |
5555 | ||
df3e68b1 HK |
5556 | -- Needs_Finalization: Set if the type is controlled or has controlled |
5557 | -- components. | |
4d744221 | 5558 | |
b2e1beb3 | 5559 | declare |
df3e68b1 | 5560 | Needs_Fin : Entity_Id; |
b2e1beb3 | 5561 | begin |
df3e68b1 HK |
5562 | Needs_Fin := Boolean_Literals (Needs_Finalization (Typ)); |
5563 | Append_To (TSD_Aggr_List, New_Occurrence_Of (Needs_Fin, Loc)); | |
b2e1beb3 | 5564 | end; |
d0dd5209 | 5565 | |
f2cbd970 JM |
5566 | -- Size_Func |
5567 | ||
5568 | if RTE_Record_Component_Available (RE_Size_Func) then | |
87dc09cb AC |
5569 | |
5570 | -- Initialize this field to Null_Address if we are not building | |
5571 | -- static dispatch tables static or if the size function is not | |
5572 | -- available. In the former case we cannot initialize this field | |
5573 | -- until the function is frozen and registered in the dispatch | |
5574 | -- table (see Register_Primitive). | |
5575 | ||
5576 | if not Building_Static_DT (Typ) or else not Has_DT (Typ) then | |
f2cbd970 JM |
5577 | Append_To (TSD_Aggr_List, |
5578 | Unchecked_Convert_To (RTE (RE_Size_Ptr), | |
e4494292 | 5579 | New_Occurrence_Of (RTE (RE_Null_Address), Loc))); |
f2cbd970 JM |
5580 | |
5581 | else | |
5582 | declare | |
5583 | Prim_Elmt : Elmt_Id; | |
5584 | Prim : Entity_Id; | |
1f8766d3 | 5585 | Size_Comp : Node_Id := Empty; |
f2cbd970 JM |
5586 | |
5587 | begin | |
5588 | Prim_Elmt := First_Elmt (Primitive_Operations (Typ)); | |
5589 | while Present (Prim_Elmt) loop | |
5590 | Prim := Node (Prim_Elmt); | |
5591 | ||
5592 | if Chars (Prim) = Name_uSize then | |
b81a5940 | 5593 | Prim := Ultimate_Alias (Prim); |
f2cbd970 JM |
5594 | |
5595 | if Is_Abstract_Subprogram (Prim) then | |
1c218ac3 | 5596 | Size_Comp := |
f2cbd970 | 5597 | Unchecked_Convert_To (RTE (RE_Size_Ptr), |
e4494292 | 5598 | New_Occurrence_Of (RTE (RE_Null_Address), Loc)); |
f2cbd970 | 5599 | else |
1c218ac3 | 5600 | Size_Comp := |
f2cbd970 JM |
5601 | Unchecked_Convert_To (RTE (RE_Size_Ptr), |
5602 | Make_Attribute_Reference (Loc, | |
6782b1ef | 5603 | Prefix => New_Occurrence_Of (Prim, Loc), |
1c218ac3 | 5604 | Attribute_Name => Name_Unrestricted_Access)); |
f2cbd970 JM |
5605 | end if; |
5606 | ||
5607 | exit; | |
5608 | end if; | |
5609 | ||
5610 | Next_Elmt (Prim_Elmt); | |
5611 | end loop; | |
1c218ac3 AC |
5612 | |
5613 | pragma Assert (Present (Size_Comp)); | |
5614 | Append_To (TSD_Aggr_List, Size_Comp); | |
f2cbd970 JM |
5615 | end; |
5616 | end if; | |
5617 | end if; | |
5618 | ||
d0dd5209 JM |
5619 | -- Interfaces_Table (required for AI-405) |
5620 | ||
5621 | if RTE_Record_Component_Available (RE_Interfaces_Table) then | |
5622 | ||
5623 | -- Count the number of interface types implemented by Typ | |
5624 | ||
ce2b6ba5 | 5625 | Collect_Interfaces (Typ, Typ_Ifaces); |
d0dd5209 JM |
5626 | |
5627 | AI := First_Elmt (Typ_Ifaces); | |
5628 | while Present (AI) loop | |
5629 | Num_Ifaces := Num_Ifaces + 1; | |
5630 | Next_Elmt (AI); | |
5631 | end loop; | |
4d744221 | 5632 | |
dee4682a | 5633 | if Num_Ifaces = 0 then |
d0dd5209 | 5634 | Iface_Table_Node := Make_Null (Loc); |
4d744221 | 5635 | |
d0dd5209 | 5636 | -- Generate the Interface_Table object |
dee4682a JM |
5637 | |
5638 | else | |
d0dd5209 | 5639 | declare |
3ec54569 PMR |
5640 | TSD_Ifaces_List : constant List_Id := New_List; |
5641 | Elmt : Elmt_Id; | |
3ec54569 PMR |
5642 | Offset_To_Top : Node_Id; |
5643 | Sec_DT_Tag : Node_Id; | |
d0dd5209 | 5644 | |
7225a479 JM |
5645 | Dummy_Object_Ifaces_List : Elist_Id := No_Elist; |
5646 | Dummy_Object_Ifaces_Comp_List : Elist_Id := No_Elist; | |
5647 | Dummy_Object_Ifaces_Tag_List : Elist_Id := No_Elist; | |
5648 | -- Interfaces information of the dummy object | |
5649 | ||
d0dd5209 | 5650 | begin |
3ec54569 PMR |
5651 | -- Collect interfaces information if we need to compute the |
5652 | -- offset to the top using the dummy object. | |
5653 | ||
5654 | if Present (Dummy_Object) then | |
5655 | Collect_Interfaces_Info (Typ, | |
7225a479 JM |
5656 | Ifaces_List => Dummy_Object_Ifaces_List, |
5657 | Components_List => Dummy_Object_Ifaces_Comp_List, | |
5658 | Tags_List => Dummy_Object_Ifaces_Tag_List); | |
3ec54569 PMR |
5659 | end if; |
5660 | ||
d0dd5209 JM |
5661 | AI := First_Elmt (Typ_Ifaces); |
5662 | while Present (AI) loop | |
4ac2477e | 5663 | if Is_Ancestor (Node (AI), Typ, Use_Full_View => True) then |
65e5747e PMR |
5664 | Sec_DT_Tag := New_Occurrence_Of (DT_Ptr, Loc); |
5665 | ||
80b992ae | 5666 | else |
1923d2d6 JM |
5667 | Elmt := |
5668 | Next_Elmt | |
5669 | (Next_Elmt (First_Elmt (Access_Disp_Table (Typ)))); | |
80b992ae HK |
5670 | pragma Assert (Has_Thunks (Node (Elmt))); |
5671 | ||
cefce34c | 5672 | while Is_Tag (Node (Elmt)) |
65e5747e PMR |
5673 | and then not |
5674 | Is_Ancestor (Node (AI), Related_Type (Node (Elmt)), | |
5675 | Use_Full_View => True) | |
80b992ae HK |
5676 | loop |
5677 | pragma Assert (Has_Thunks (Node (Elmt))); | |
5678 | Next_Elmt (Elmt); | |
1923d2d6 JM |
5679 | pragma Assert (Has_Thunks (Node (Elmt))); |
5680 | Next_Elmt (Elmt); | |
5681 | pragma Assert (not Has_Thunks (Node (Elmt))); | |
5682 | Next_Elmt (Elmt); | |
80b992ae HK |
5683 | pragma Assert (not Has_Thunks (Node (Elmt))); |
5684 | Next_Elmt (Elmt); | |
5685 | end loop; | |
5686 | ||
5687 | pragma Assert (Ekind (Node (Elmt)) = E_Constant | |
1923d2d6 JM |
5688 | and then not |
5689 | Has_Thunks (Node (Next_Elmt (Next_Elmt (Elmt))))); | |
65e5747e | 5690 | |
80b992ae | 5691 | Sec_DT_Tag := |
65e5747e PMR |
5692 | New_Occurrence_Of |
5693 | (Node (Next_Elmt (Next_Elmt (Elmt))), Loc); | |
80b992ae HK |
5694 | end if; |
5695 | ||
7225a479 JM |
5696 | -- Use the dummy object to compute Offset_To_Top of |
5697 | -- components located at fixed position. | |
3ec54569 PMR |
5698 | |
5699 | if Present (Dummy_Object) then | |
5700 | declare | |
5701 | Iface : constant Node_Id := Node (AI); | |
5702 | Iface_Comp : Node_Id := Empty; | |
5703 | Iface_Comp_Elmt : Elmt_Id; | |
5704 | Iface_Elmt : Elmt_Id; | |
5705 | ||
5706 | begin | |
7225a479 JM |
5707 | Iface_Elmt := |
5708 | First_Elmt (Dummy_Object_Ifaces_List); | |
5709 | Iface_Comp_Elmt := | |
5710 | First_Elmt (Dummy_Object_Ifaces_Comp_List); | |
3ec54569 PMR |
5711 | |
5712 | while Present (Iface_Elmt) loop | |
5713 | if Node (Iface_Elmt) = Iface then | |
5714 | Iface_Comp := Node (Iface_Comp_Elmt); | |
5715 | exit; | |
5716 | end if; | |
5717 | ||
5718 | Next_Elmt (Iface_Elmt); | |
5719 | Next_Elmt (Iface_Comp_Elmt); | |
5720 | end loop; | |
65e5747e | 5721 | |
3ec54569 PMR |
5722 | pragma Assert (Present (Iface_Comp)); |
5723 | ||
7225a479 JM |
5724 | if not |
5725 | Is_Variable_Size_Record (Etype (Scope (Iface_Comp))) | |
5726 | then | |
5727 | Offset_To_Top := | |
5728 | Make_Op_Minus (Loc, | |
5729 | Make_Attribute_Reference (Loc, | |
5730 | Prefix => | |
5731 | Make_Selected_Component (Loc, | |
5732 | Prefix => | |
5733 | New_Occurrence_Of (Dummy_Object, Loc), | |
5734 | Selector_Name => | |
5735 | New_Occurrence_Of (Iface_Comp, Loc)), | |
5736 | Attribute_Name => Name_Position)); | |
5737 | else | |
5738 | Offset_To_Top := Make_Integer_Literal (Loc, 0); | |
5739 | end if; | |
3ec54569 PMR |
5740 | end; |
5741 | else | |
5742 | Offset_To_Top := Make_Integer_Literal (Loc, 0); | |
5743 | end if; | |
5744 | ||
b2e1beb3 | 5745 | Append_To (TSD_Ifaces_List, |
65e5747e PMR |
5746 | Make_Aggregate (Loc, |
5747 | Expressions => New_List ( | |
b2e1beb3 ES |
5748 | |
5749 | -- Iface_Tag | |
5750 | ||
e18d6a15 | 5751 | Unchecked_Convert_To (RTE (RE_Tag), |
e4494292 | 5752 | New_Occurrence_Of |
d0dd5209 | 5753 | (Node (First_Elmt (Access_Disp_Table (Node (AI)))), |
b2e1beb3 | 5754 | Loc)), |
d0dd5209 | 5755 | |
b2e1beb3 | 5756 | -- Static_Offset_To_Top |
d0dd5209 | 5757 | |
e4494292 | 5758 | New_Occurrence_Of (Standard_True, Loc), |
d0dd5209 | 5759 | |
b2e1beb3 ES |
5760 | -- Offset_To_Top_Value |
5761 | ||
3ec54569 | 5762 | Offset_To_Top, |
b2e1beb3 ES |
5763 | |
5764 | -- Offset_To_Top_Func | |
5765 | ||
80b992ae HK |
5766 | Make_Null (Loc), |
5767 | ||
5768 | -- Secondary_DT | |
5769 | ||
65e5747e | 5770 | Unchecked_Convert_To (RTE (RE_Tag), Sec_DT_Tag)))); |
d0dd5209 | 5771 | |
d0dd5209 JM |
5772 | Next_Elmt (AI); |
5773 | end loop; | |
d0dd5209 | 5774 | |
b2e1beb3 ES |
5775 | Name_ITable := New_External_Name (Tname, 'I'); |
5776 | ITable := Make_Defining_Identifier (Loc, Name_ITable); | |
5b7dd52d JM |
5777 | Set_Is_Statically_Allocated (ITable, |
5778 | Is_Library_Level_Tagged_Type (Typ)); | |
d0dd5209 | 5779 | |
3ec54569 PMR |
5780 | -- The table of interfaces is constant if we are building a |
5781 | -- static dispatch table; otherwise is not constant because | |
5782 | -- its slots are filled at run time by the IP routine. | |
d0dd5209 | 5783 | |
b2e1beb3 ES |
5784 | Append_To (Result, |
5785 | Make_Object_Declaration (Loc, | |
5786 | Defining_Identifier => ITable, | |
5787 | Aliased_Present => True, | |
7225a479 | 5788 | Constant_Present => Building_Static_Secondary_DT (Typ), |
b2e1beb3 ES |
5789 | Object_Definition => |
5790 | Make_Subtype_Indication (Loc, | |
5791 | Subtype_Mark => | |
e4494292 | 5792 | New_Occurrence_Of (RTE (RE_Interface_Data), Loc), |
6782b1ef AC |
5793 | Constraint => |
5794 | Make_Index_Or_Discriminant_Constraint (Loc, | |
5795 | Constraints => New_List ( | |
5796 | Make_Integer_Literal (Loc, Num_Ifaces)))), | |
d0dd5209 | 5797 | |
65e5747e PMR |
5798 | Expression => |
5799 | Make_Aggregate (Loc, | |
5800 | Expressions => New_List ( | |
5801 | Make_Integer_Literal (Loc, Num_Ifaces), | |
5802 | Make_Aggregate (Loc, TSD_Ifaces_List))))); | |
d0dd5209 | 5803 | |
b2e1beb3 ES |
5804 | Iface_Table_Node := |
5805 | Make_Attribute_Reference (Loc, | |
e4494292 | 5806 | Prefix => New_Occurrence_Of (ITable, Loc), |
b2e1beb3 ES |
5807 | Attribute_Name => Name_Unchecked_Access); |
5808 | end; | |
d0dd5209 JM |
5809 | end if; |
5810 | ||
b2e1beb3 | 5811 | Append_To (TSD_Aggr_List, Iface_Table_Node); |
d0dd5209 JM |
5812 | end if; |
5813 | ||
5814 | -- Generate the Select Specific Data table for synchronized types that | |
5815 | -- implement synchronized interfaces. The size of the table is | |
5816 | -- constrained by the number of non-predefined primitive operations. | |
5817 | ||
5818 | if RTE_Record_Component_Available (RE_SSD) then | |
0791fbe9 | 5819 | if Ada_Version >= Ada_2005 |
e18d6a15 | 5820 | and then Has_DT (Typ) |
d0dd5209 | 5821 | and then Is_Concurrent_Record_Type (Typ) |
ce2b6ba5 | 5822 | and then Has_Interfaces (Typ) |
d0dd5209 JM |
5823 | and then Nb_Prim > 0 |
5824 | and then not Is_Abstract_Type (Typ) | |
5825 | and then not Is_Controlled (Typ) | |
5826 | and then not Restriction_Active (No_Dispatching_Calls) | |
c09a557e | 5827 | and then not Restriction_Active (No_Select_Statements) |
d0dd5209 | 5828 | then |
dee4682a JM |
5829 | Append_To (Result, |
5830 | Make_Object_Declaration (Loc, | |
d0dd5209 | 5831 | Defining_Identifier => SSD, |
dee4682a JM |
5832 | Aliased_Present => True, |
5833 | Object_Definition => | |
5834 | Make_Subtype_Indication (Loc, | |
e4494292 | 5835 | Subtype_Mark => New_Occurrence_Of ( |
d0dd5209 JM |
5836 | RTE (RE_Select_Specific_Data), Loc), |
5837 | Constraint => | |
5838 | Make_Index_Or_Discriminant_Constraint (Loc, | |
5839 | Constraints => New_List ( | |
5840 | Make_Integer_Literal (Loc, Nb_Prim)))))); | |
5841 | ||
b2e1beb3 ES |
5842 | Append_To (Result, |
5843 | Make_Attribute_Definition_Clause (Loc, | |
e4494292 | 5844 | Name => New_Occurrence_Of (SSD, Loc), |
b2e1beb3 ES |
5845 | Chars => Name_Alignment, |
5846 | Expression => | |
5847 | Make_Attribute_Reference (Loc, | |
6782b1ef | 5848 | Prefix => |
e4494292 | 5849 | New_Occurrence_Of (RTE (RE_Integer_Address), Loc), |
b2e1beb3 ES |
5850 | Attribute_Name => Name_Alignment))); |
5851 | ||
d0dd5209 JM |
5852 | -- This table is initialized by Make_Select_Specific_Data_Table, |
5853 | -- which calls Set_Entry_Index and Set_Prim_Op_Kind. | |
5854 | ||
5855 | Append_To (TSD_Aggr_List, | |
b2e1beb3 | 5856 | Make_Attribute_Reference (Loc, |
6782b1ef | 5857 | Prefix => New_Occurrence_Of (SSD, Loc), |
b2e1beb3 | 5858 | Attribute_Name => Name_Unchecked_Access)); |
d0dd5209 | 5859 | else |
b2e1beb3 | 5860 | Append_To (TSD_Aggr_List, Make_Null (Loc)); |
dee4682a | 5861 | end if; |
4d744221 JM |
5862 | end if; |
5863 | ||
d0dd5209 JM |
5864 | -- Initialize the table of ancestor tags. In case of interface types |
5865 | -- this table is not needed. | |
10b93b2e | 5866 | |
f2cbd970 | 5867 | TSD_Tags_List := New_List; |
4d744221 | 5868 | |
f2cbd970 JM |
5869 | -- If we are not statically allocating the dispatch table then we must |
5870 | -- fill position 0 with null because we still have not generated the | |
5871 | -- tag of Typ. | |
dee4682a | 5872 | |
f2cbd970 JM |
5873 | if not Building_Static_DT (Typ) |
5874 | or else Is_Interface (Typ) | |
5875 | then | |
5876 | Append_To (TSD_Tags_List, | |
5877 | Unchecked_Convert_To (RTE (RE_Tag), | |
e4494292 | 5878 | New_Occurrence_Of (RTE (RE_Null_Address), Loc))); |
dee4682a | 5879 | |
f2cbd970 | 5880 | -- Otherwise we can safely reference the tag |
dee4682a | 5881 | |
f2cbd970 JM |
5882 | else |
5883 | Append_To (TSD_Tags_List, | |
e4494292 | 5884 | New_Occurrence_Of (DT_Ptr, Loc)); |
f2cbd970 | 5885 | end if; |
dee4682a | 5886 | |
f2cbd970 | 5887 | -- Fill the rest of the table with the tags of the ancestors |
dee4682a | 5888 | |
f2cbd970 JM |
5889 | declare |
5890 | Current_Typ : Entity_Id; | |
5891 | Parent_Typ : Entity_Id; | |
5892 | Pos : Nat; | |
d0dd5209 | 5893 | |
f2cbd970 | 5894 | begin |
b2e1beb3 ES |
5895 | Pos := 1; |
5896 | Current_Typ := Typ; | |
d0dd5209 | 5897 | |
b2e1beb3 ES |
5898 | loop |
5899 | Parent_Typ := Etype (Current_Typ); | |
dee4682a | 5900 | |
b2e1beb3 ES |
5901 | if Is_Private_Type (Parent_Typ) then |
5902 | Parent_Typ := Full_View (Base_Type (Parent_Typ)); | |
5903 | end if; | |
5904 | ||
5905 | exit when Parent_Typ = Current_Typ; | |
5906 | ||
daa72421 AC |
5907 | if Is_CPP_Class (Parent_Typ) then |
5908 | ||
b2e1beb3 ES |
5909 | -- The tags defined in the C++ side will be inherited when |
5910 | -- the object is constructed (Exp_Ch3.Build_Init_Procedure) | |
5911 | ||
5912 | Append_To (TSD_Tags_List, | |
5913 | Unchecked_Convert_To (RTE (RE_Tag), | |
e4494292 | 5914 | New_Occurrence_Of (RTE (RE_Null_Address), Loc))); |
b2e1beb3 ES |
5915 | else |
5916 | Append_To (TSD_Tags_List, | |
e4494292 | 5917 | New_Occurrence_Of |
b2e1beb3 ES |
5918 | (Node (First_Elmt (Access_Disp_Table (Parent_Typ))), |
5919 | Loc)); | |
5920 | end if; | |
5921 | ||
5922 | Pos := Pos + 1; | |
5923 | Current_Typ := Parent_Typ; | |
5924 | end loop; | |
5925 | ||
5926 | pragma Assert (Pos = I_Depth + 1); | |
5927 | end; | |
5928 | ||
5929 | Append_To (TSD_Aggr_List, | |
5930 | Make_Aggregate (Loc, | |
5931 | Expressions => TSD_Tags_List)); | |
dee4682a | 5932 | |
d0dd5209 | 5933 | -- Build the TSD object |
dee4682a JM |
5934 | |
5935 | Append_To (Result, | |
5936 | Make_Object_Declaration (Loc, | |
5937 | Defining_Identifier => TSD, | |
5938 | Aliased_Present => True, | |
e18d6a15 | 5939 | Constant_Present => Building_Static_DT (Typ), |
dee4682a JM |
5940 | Object_Definition => |
5941 | Make_Subtype_Indication (Loc, | |
e4494292 | 5942 | Subtype_Mark => New_Occurrence_Of ( |
dee4682a JM |
5943 | RTE (RE_Type_Specific_Data), Loc), |
5944 | Constraint => | |
5945 | Make_Index_Or_Discriminant_Constraint (Loc, | |
5946 | Constraints => New_List ( | |
5947 | Make_Integer_Literal (Loc, I_Depth)))), | |
d0dd5209 | 5948 | |
dee4682a | 5949 | Expression => Make_Aggregate (Loc, |
b2e1beb3 | 5950 | Expressions => TSD_Aggr_List))); |
dee4682a | 5951 | |
e18d6a15 JM |
5952 | Set_Is_True_Constant (TSD, Building_Static_DT (Typ)); |
5953 | ||
e18d6a15 | 5954 | -- Initialize or declare the dispatch table object |
dee4682a | 5955 | |
e18d6a15 | 5956 | if not Has_DT (Typ) then |
d0dd5209 JM |
5957 | DT_Constr_List := New_List; |
5958 | DT_Aggr_List := New_List; | |
dee4682a | 5959 | |
d0dd5209 | 5960 | -- Typeinfo |
4d744221 | 5961 | |
d0dd5209 JM |
5962 | New_Node := |
5963 | Make_Attribute_Reference (Loc, | |
6782b1ef | 5964 | Prefix => New_Occurrence_Of (TSD, Loc), |
d0dd5209 JM |
5965 | Attribute_Name => Name_Address); |
5966 | ||
5967 | Append_To (DT_Constr_List, New_Node); | |
5968 | Append_To (DT_Aggr_List, New_Copy (New_Node)); | |
5969 | Append_To (DT_Aggr_List, Make_Integer_Literal (Loc, 0)); | |
5970 | ||
5971 | -- In case of locally defined tagged types we have already declared | |
5972 | -- and uninitialized object for the dispatch table, which is now | |
e18d6a15 JM |
5973 | -- initialized by means of the following assignment: |
5974 | ||
5975 | -- DT := (TSD'Address, 0); | |
d0dd5209 | 5976 | |
e18d6a15 | 5977 | if not Building_Static_DT (Typ) then |
d0dd5209 JM |
5978 | Append_To (Result, |
5979 | Make_Assignment_Statement (Loc, | |
6782b1ef AC |
5980 | Name => New_Occurrence_Of (DT, Loc), |
5981 | Expression => Make_Aggregate (Loc, DT_Aggr_List))); | |
d0dd5209 | 5982 | |
e18d6a15 JM |
5983 | -- In case of library level tagged types we declare and export now |
5984 | -- the constant object containing the dummy dispatch table. There | |
5985 | -- is no need to declare the tag here because it has been previously | |
5986 | -- declared by Make_Tags | |
5987 | ||
5988 | -- DT : aliased constant No_Dispatch_Table := | |
5989 | -- (NDT_TSD => TSD'Address; | |
5990 | -- NDT_Prims_Ptr => 0); | |
d0dd5209 JM |
5991 | |
5992 | else | |
5993 | Append_To (Result, | |
5994 | Make_Object_Declaration (Loc, | |
5995 | Defining_Identifier => DT, | |
5996 | Aliased_Present => True, | |
b2e1beb3 | 5997 | Constant_Present => True, |
d0dd5209 | 5998 | Object_Definition => |
e4494292 | 5999 | New_Occurrence_Of (RTE (RE_No_Dispatch_Table_Wrapper), Loc), |
6782b1ef | 6000 | Expression => Make_Aggregate (Loc, DT_Aggr_List))); |
d0dd5209 | 6001 | |
e18d6a15 | 6002 | Export_DT (Typ, DT); |
d0dd5209 JM |
6003 | end if; |
6004 | ||
6005 | -- Common case: Typ has a dispatch table | |
6006 | ||
6007 | -- Generate: | |
6008 | ||
6009 | -- Predef_Prims : Address_Array (1 .. Default_Prim_Ops_Count) := | |
6010 | -- (predef-prim-op-1'address, | |
6011 | -- predef-prim-op-2'address, | |
6012 | -- ... | |
6013 | -- predef-prim-op-n'address); | |
d0dd5209 JM |
6014 | |
6015 | -- DT : Dispatch_Table (Nb_Prims) := | |
6016 | -- (Signature => <sig-value>, | |
6017 | -- Tag_Kind => <tag_kind-value>, | |
6018 | -- Predef_Prims => Predef_Prims'First'Address, | |
6019 | -- Offset_To_Top => 0, | |
6020 | -- TSD => TSD'Address; | |
6021 | -- Prims_Ptr => (prim-op-1'address, | |
6022 | -- prim-op-2'address, | |
6023 | -- ... | |
6024 | -- prim-op-n'address)); | |
b2e1beb3 | 6025 | -- for DT'Alignment use Address'Alignment |
d0dd5209 JM |
6026 | |
6027 | else | |
6028 | declare | |
bd5ed03a JM |
6029 | Nb_P_Prims : constant Nat := Number_Of_Predefined_Prims (Typ); |
6030 | Prim_Table : array (Nat range 1 .. Nb_P_Prims) of Entity_Id; | |
6031 | Decl : Node_Id; | |
6032 | E : Entity_Id; | |
d0dd5209 JM |
6033 | |
6034 | begin | |
bd5ed03a JM |
6035 | Prim_Ops_Aggr_List := New_List; |
6036 | Prim_Table := (others => Empty); | |
d0dd5209 | 6037 | |
bd5ed03a JM |
6038 | if Building_Static_DT (Typ) then |
6039 | Prim_Elmt := First_Elmt (Primitive_Operations (Typ)); | |
d0dd5209 JM |
6040 | while Present (Prim_Elmt) loop |
6041 | Prim := Node (Prim_Elmt); | |
6042 | ||
6043 | if Is_Predefined_Dispatching_Operation (Prim) | |
6044 | and then not Is_Abstract_Subprogram (Prim) | |
bd5ed03a JM |
6045 | and then not Is_Eliminated (Prim) |
6046 | and then not Generate_SCIL | |
6047 | and then not Present (Prim_Table | |
6048 | (UI_To_Int (DT_Position (Prim)))) | |
d0dd5209 | 6049 | then |
bd5ed03a JM |
6050 | E := Ultimate_Alias (Prim); |
6051 | pragma Assert (not Is_Abstract_Subprogram (E)); | |
6052 | Prim_Table (UI_To_Int (DT_Position (Prim))) := E; | |
d0dd5209 JM |
6053 | end if; |
6054 | ||
6055 | Next_Elmt (Prim_Elmt); | |
6056 | end loop; | |
6057 | end if; | |
6058 | ||
bd5ed03a JM |
6059 | for J in Prim_Table'Range loop |
6060 | if Present (Prim_Table (J)) then | |
6061 | New_Node := | |
6062 | Unchecked_Convert_To (RTE (RE_Prim_Ptr), | |
6063 | Make_Attribute_Reference (Loc, | |
6064 | Prefix => | |
6065 | New_Occurrence_Of (Prim_Table (J), Loc), | |
6066 | Attribute_Name => Name_Unrestricted_Access)); | |
6067 | else | |
6068 | New_Node := Make_Null (Loc); | |
80b992ae | 6069 | end if; |
d0dd5209 | 6070 | |
bd5ed03a JM |
6071 | Append_To (Prim_Ops_Aggr_List, New_Node); |
6072 | end loop; | |
dee4682a | 6073 | |
bd5ed03a JM |
6074 | New_Node := |
6075 | Make_Aggregate (Loc, | |
6076 | Expressions => Prim_Ops_Aggr_List); | |
f2cbd970 | 6077 | |
bd5ed03a JM |
6078 | Decl := |
6079 | Make_Subtype_Declaration (Loc, | |
6080 | Defining_Identifier => Make_Temporary (Loc, 'S'), | |
6081 | Subtype_Indication => | |
6082 | New_Occurrence_Of (RTE (RE_Address_Array), Loc)); | |
f2cbd970 | 6083 | |
bd5ed03a | 6084 | Append_To (Result, Decl); |
f2cbd970 | 6085 | |
bd5ed03a JM |
6086 | Append_To (Result, |
6087 | Make_Object_Declaration (Loc, | |
6088 | Defining_Identifier => Predef_Prims, | |
6089 | Aliased_Present => True, | |
6090 | Constant_Present => Building_Static_DT (Typ), | |
6091 | Object_Definition => | |
6092 | New_Occurrence_Of (Defining_Identifier (Decl), Loc), | |
6093 | Expression => New_Node)); | |
f2cbd970 | 6094 | |
bd5ed03a | 6095 | -- Remember aggregates initializing dispatch tables |
f2cbd970 | 6096 | |
bd5ed03a | 6097 | Append_Elmt (New_Node, DT_Aggr); |
d0dd5209 JM |
6098 | end; |
6099 | ||
6100 | -- Stage 1: Initialize the discriminant and the record components | |
6101 | ||
6102 | DT_Constr_List := New_List; | |
6103 | DT_Aggr_List := New_List; | |
6104 | ||
6105 | -- Num_Prims. If the tagged type has no primitives we add a dummy | |
6106 | -- slot whose address will be the tag of this type. | |
6107 | ||
6108 | if Nb_Prim = 0 then | |
6109 | New_Node := Make_Integer_Literal (Loc, 1); | |
6110 | else | |
6111 | New_Node := Make_Integer_Literal (Loc, Nb_Prim); | |
6112 | end if; | |
6113 | ||
6114 | Append_To (DT_Constr_List, New_Node); | |
6115 | Append_To (DT_Aggr_List, New_Copy (New_Node)); | |
6116 | ||
6117 | -- Signature | |
6118 | ||
6119 | if RTE_Record_Component_Available (RE_Signature) then | |
6120 | Append_To (DT_Aggr_List, | |
e4494292 | 6121 | New_Occurrence_Of (RTE (RE_Primary_DT), Loc)); |
d0dd5209 JM |
6122 | end if; |
6123 | ||
6124 | -- Tag_Kind | |
6125 | ||
6126 | if RTE_Record_Component_Available (RE_Tag_Kind) then | |
6127 | Append_To (DT_Aggr_List, Tagged_Kind (Typ)); | |
6128 | end if; | |
6129 | ||
6130 | -- Predef_Prims | |
6131 | ||
6132 | Append_To (DT_Aggr_List, | |
6133 | Make_Attribute_Reference (Loc, | |
6782b1ef | 6134 | Prefix => New_Occurrence_Of (Predef_Prims, Loc), |
d0dd5209 JM |
6135 | Attribute_Name => Name_Address)); |
6136 | ||
6137 | -- Offset_To_Top | |
6138 | ||
f2cbd970 | 6139 | Append_To (DT_Aggr_List, Make_Integer_Literal (Loc, 0)); |
d0dd5209 JM |
6140 | |
6141 | -- Typeinfo | |
6142 | ||
6143 | Append_To (DT_Aggr_List, | |
6144 | Make_Attribute_Reference (Loc, | |
6782b1ef | 6145 | Prefix => New_Occurrence_Of (TSD, Loc), |
d0dd5209 JM |
6146 | Attribute_Name => Name_Address)); |
6147 | ||
22a83cea | 6148 | -- Stage 2: Initialize the table of user-defined primitive operations |
d0dd5209 JM |
6149 | |
6150 | Prim_Ops_Aggr_List := New_List; | |
6151 | ||
6152 | if Nb_Prim = 0 then | |
f2cbd970 | 6153 | Append_To (Prim_Ops_Aggr_List, Make_Null (Loc)); |
d0dd5209 | 6154 | |
bfae1846 | 6155 | elsif not Building_Static_DT (Typ) then |
d0dd5209 | 6156 | for J in 1 .. Nb_Prim loop |
f2cbd970 | 6157 | Append_To (Prim_Ops_Aggr_List, Make_Null (Loc)); |
d0dd5209 JM |
6158 | end loop; |
6159 | ||
6160 | else | |
6161 | declare | |
cefce34c JM |
6162 | CPP_Nb_Prims : constant Nat := CPP_Num_Prims (Typ); |
6163 | E : Entity_Id; | |
6164 | Prim : Entity_Id; | |
6165 | Prim_Elmt : Elmt_Id; | |
6166 | Prim_Pos : Nat; | |
6167 | Prim_Table : array (Nat range 1 .. Nb_Prim) of Entity_Id; | |
d0dd5209 JM |
6168 | |
6169 | begin | |
6170 | Prim_Table := (others => Empty); | |
80b992ae HK |
6171 | |
6172 | Prim_Elmt := First_Elmt (Primitive_Operations (Typ)); | |
d0dd5209 JM |
6173 | while Present (Prim_Elmt) loop |
6174 | Prim := Node (Prim_Elmt); | |
6175 | ||
16212e89 GD |
6176 | -- Retrieve the ultimate alias of the primitive for proper |
6177 | -- handling of renamings and eliminated primitives. | |
6178 | ||
cc3a2986 | 6179 | E := Ultimate_Alias (Prim); |
74a78a4f AC |
6180 | |
6181 | -- If the alias is not a primitive operation then Prim does | |
6182 | -- not rename another primitive, but rather an operation | |
6183 | -- declared elsewhere (e.g. in another scope) and therefore | |
6184 | -- Prim is a new primitive. | |
6185 | ||
6186 | if No (Find_Dispatching_Type (E)) then | |
6187 | E := Prim; | |
6188 | end if; | |
6189 | ||
cefce34c | 6190 | Prim_Pos := UI_To_Int (DT_Position (E)); |
16212e89 | 6191 | |
241ebe89 HK |
6192 | -- Skip predefined primitives because they are located in a |
6193 | -- separate dispatch table. | |
d0dd5209 | 6194 | |
9e9df9da AC |
6195 | if not Is_Predefined_Dispatching_Operation (Prim) |
6196 | and then not Is_Predefined_Dispatching_Operation (E) | |
241ebe89 HK |
6197 | |
6198 | -- Skip entities with attribute Interface_Alias because | |
6199 | -- those are only required to build secondary dispatch | |
6200 | -- tables. | |
6201 | ||
9e9df9da | 6202 | and then not Present (Interface_Alias (Prim)) |
241ebe89 HK |
6203 | |
6204 | -- Skip abstract and eliminated primitives | |
6205 | ||
9e9df9da | 6206 | and then not Is_Abstract_Subprogram (E) |
9e9df9da | 6207 | and then not Is_Eliminated (E) |
241ebe89 HK |
6208 | |
6209 | -- For derivations of CPP types skip primitives located in | |
6210 | -- the C++ part of the dispatch table because their slots | |
6211 | -- are initialized by the IC routine. | |
6212 | ||
cefce34c JM |
6213 | and then (not Is_CPP_Class (Root_Type (Typ)) |
6214 | or else Prim_Pos > CPP_Nb_Prims) | |
241ebe89 HK |
6215 | |
6216 | -- Skip ignored Ghost subprograms as those will be removed | |
6217 | -- from the executable. | |
6218 | ||
6219 | and then not Is_Ignored_Ghost_Entity (E) | |
9e9df9da AC |
6220 | then |
6221 | pragma Assert | |
6222 | (UI_To_Int (DT_Position (Prim)) <= Nb_Prim); | |
6223 | ||
6224 | Prim_Table (UI_To_Int (DT_Position (Prim))) := E; | |
d0dd5209 JM |
6225 | end if; |
6226 | ||
6227 | Next_Elmt (Prim_Elmt); | |
6228 | end loop; | |
6229 | ||
6230 | for J in Prim_Table'Range loop | |
6231 | if Present (Prim_Table (J)) then | |
6232 | New_Node := | |
f2cbd970 | 6233 | Unchecked_Convert_To (RTE (RE_Prim_Ptr), |
1923d2d6 | 6234 | Make_Attribute_Reference (Loc, |
6782b1ef AC |
6235 | Prefix => |
6236 | New_Occurrence_Of (Prim_Table (J), Loc), | |
1923d2d6 | 6237 | Attribute_Name => Name_Unrestricted_Access)); |
d0dd5209 | 6238 | else |
f2cbd970 | 6239 | New_Node := Make_Null (Loc); |
d0dd5209 JM |
6240 | end if; |
6241 | ||
6242 | Append_To (Prim_Ops_Aggr_List, New_Node); | |
6243 | end loop; | |
6244 | end; | |
6245 | end if; | |
6246 | ||
f2cbd970 | 6247 | New_Node := |
d0dd5209 | 6248 | Make_Aggregate (Loc, |
f2cbd970 JM |
6249 | Expressions => Prim_Ops_Aggr_List); |
6250 | ||
6251 | Append_To (DT_Aggr_List, New_Node); | |
6252 | ||
6253 | -- Remember aggregates initializing dispatch tables | |
6254 | ||
6255 | Append_Elmt (New_Node, DT_Aggr); | |
d0dd5209 JM |
6256 | |
6257 | -- In case of locally defined tagged types we have already declared | |
6258 | -- and uninitialized object for the dispatch table, which is now | |
6259 | -- initialized by means of an assignment. | |
6260 | ||
e18d6a15 | 6261 | if not Building_Static_DT (Typ) then |
d0dd5209 JM |
6262 | Append_To (Result, |
6263 | Make_Assignment_Statement (Loc, | |
6782b1ef AC |
6264 | Name => New_Occurrence_Of (DT, Loc), |
6265 | Expression => Make_Aggregate (Loc, DT_Aggr_List))); | |
d0dd5209 | 6266 | |
e18d6a15 JM |
6267 | -- In case of library level tagged types we declare now and export |
6268 | -- the constant object containing the dispatch table. | |
d0dd5209 JM |
6269 | |
6270 | else | |
6271 | Append_To (Result, | |
6272 | Make_Object_Declaration (Loc, | |
6273 | Defining_Identifier => DT, | |
6274 | Aliased_Present => True, | |
b2e1beb3 | 6275 | Constant_Present => True, |
d0dd5209 JM |
6276 | Object_Definition => |
6277 | Make_Subtype_Indication (Loc, | |
e4494292 | 6278 | Subtype_Mark => New_Occurrence_Of |
d0dd5209 JM |
6279 | (RTE (RE_Dispatch_Table_Wrapper), Loc), |
6280 | Constraint => Make_Index_Or_Discriminant_Constraint (Loc, | |
6281 | Constraints => DT_Constr_List)), | |
6782b1ef | 6282 | Expression => Make_Aggregate (Loc, DT_Aggr_List))); |
d0dd5209 | 6283 | |
e18d6a15 | 6284 | Export_DT (Typ, DT); |
4d744221 | 6285 | end if; |
f4d379b8 | 6286 | end if; |
10b93b2e | 6287 | |
b16d9747 JM |
6288 | -- Initialize the table of ancestor tags if not building static |
6289 | -- dispatch table | |
d0dd5209 | 6290 | |
e18d6a15 | 6291 | if not Building_Static_DT (Typ) |
b2e1beb3 | 6292 | and then not Is_Interface (Typ) |
d0dd5209 JM |
6293 | and then not Is_CPP_Class (Typ) |
6294 | then | |
6295 | Append_To (Result, | |
6296 | Make_Assignment_Statement (Loc, | |
6782b1ef | 6297 | Name => |
d0dd5209 | 6298 | Make_Indexed_Component (Loc, |
6782b1ef | 6299 | Prefix => |
d0dd5209 | 6300 | Make_Selected_Component (Loc, |
6782b1ef | 6301 | Prefix => New_Occurrence_Of (TSD, Loc), |
d0dd5209 | 6302 | Selector_Name => |
e4494292 | 6303 | New_Occurrence_Of |
d0dd5209 JM |
6304 | (RTE_Record_Component (RE_Tags_Table), Loc)), |
6305 | Expressions => | |
6306 | New_List (Make_Integer_Literal (Loc, 0))), | |
6307 | ||
6308 | Expression => | |
e4494292 | 6309 | New_Occurrence_Of |
d0dd5209 JM |
6310 | (Node (First_Elmt (Access_Disp_Table (Typ))), Loc))); |
6311 | end if; | |
6312 | ||
b16d9747 JM |
6313 | -- Inherit the dispatch tables of the parent. There is no need to |
6314 | -- inherit anything from the parent when building static dispatch tables | |
6315 | -- because the whole dispatch table (including inherited primitives) has | |
6316 | -- been already built. | |
1923d2d6 | 6317 | |
bfae1846 | 6318 | if Building_Static_DT (Typ) then |
d0dd5209 JM |
6319 | null; |
6320 | ||
bfef8d0d JM |
6321 | -- If the ancestor is a CPP_Class type we inherit the dispatch tables |
6322 | -- in the init proc, and we don't need to fill them in here. | |
10b93b2e | 6323 | |
f2cbd970 | 6324 | elsif Is_CPP_Class (Parent_Typ) then |
bfef8d0d | 6325 | null; |
10b93b2e | 6326 | |
1923d2d6 | 6327 | -- Otherwise we fill in the dispatch tables here |
10b93b2e | 6328 | |
bfef8d0d | 6329 | else |
f2cbd970 | 6330 | if Typ /= Parent_Typ |
bfef8d0d JM |
6331 | and then not Is_Interface (Typ) |
6332 | and then not Restriction_Active (No_Dispatching_Calls) | |
b0efe69e | 6333 | then |
dee4682a | 6334 | -- Inherit the dispatch table |
10b93b2e | 6335 | |
1923d2d6 | 6336 | if not Is_Interface (Typ) |
f2cbd970 JM |
6337 | and then not Is_Interface (Parent_Typ) |
6338 | and then not Is_CPP_Class (Parent_Typ) | |
1923d2d6 JM |
6339 | then |
6340 | declare | |
6341 | Nb_Prims : constant Int := | |
6342 | UI_To_Int (DT_Entry_Count | |
f2cbd970 JM |
6343 | (First_Tag_Component (Parent_Typ))); |
6344 | ||
1923d2d6 JM |
6345 | begin |
6346 | Append_To (Elab_Code, | |
6347 | Build_Inherit_Predefined_Prims (Loc, | |
6348 | Old_Tag_Node => | |
e4494292 | 6349 | New_Occurrence_Of |
1923d2d6 | 6350 | (Node |
6782b1ef AC |
6351 | (Next_Elmt |
6352 | (First_Elmt | |
6353 | (Access_Disp_Table (Parent_Typ)))), Loc), | |
1923d2d6 | 6354 | New_Tag_Node => |
e4494292 | 6355 | New_Occurrence_Of |
1923d2d6 | 6356 | (Node |
6782b1ef AC |
6357 | (Next_Elmt |
6358 | (First_Elmt | |
bd5ed03a JM |
6359 | (Access_Disp_Table (Typ)))), Loc), |
6360 | Num_Predef_Prims => | |
6361 | Number_Of_Predefined_Prims (Parent_Typ))); | |
1923d2d6 JM |
6362 | |
6363 | if Nb_Prims /= 0 then | |
d0dd5209 | 6364 | Append_To (Elab_Code, |
1923d2d6 JM |
6365 | Build_Inherit_Prims (Loc, |
6366 | Typ => Typ, | |
6367 | Old_Tag_Node => | |
e4494292 | 6368 | New_Occurrence_Of |
1923d2d6 | 6369 | (Node |
6782b1ef AC |
6370 | (First_Elmt |
6371 | (Access_Disp_Table (Parent_Typ))), Loc), | |
e4494292 | 6372 | New_Tag_Node => New_Occurrence_Of (DT_Ptr, Loc), |
1923d2d6 JM |
6373 | Num_Prims => Nb_Prims)); |
6374 | end if; | |
6375 | end; | |
bfef8d0d | 6376 | end if; |
10b93b2e | 6377 | |
bfef8d0d | 6378 | -- Inherit the secondary dispatch tables of the ancestor |
10b93b2e | 6379 | |
f2cbd970 | 6380 | if not Is_CPP_Class (Parent_Typ) then |
bfef8d0d JM |
6381 | declare |
6382 | Sec_DT_Ancestor : Elmt_Id := | |
6383 | Next_Elmt | |
6782b1ef AC |
6384 | (Next_Elmt |
6385 | (First_Elmt | |
6386 | (Access_Disp_Table | |
6387 | (Parent_Typ)))); | |
bfef8d0d JM |
6388 | Sec_DT_Typ : Elmt_Id := |
6389 | Next_Elmt | |
6782b1ef AC |
6390 | (Next_Elmt |
6391 | (First_Elmt | |
6392 | (Access_Disp_Table (Typ)))); | |
bfef8d0d JM |
6393 | |
6394 | procedure Copy_Secondary_DTs (Typ : Entity_Id); | |
6395 | -- Local procedure required to climb through the ancestors | |
6396 | -- and copy the contents of all their secondary dispatch | |
6397 | -- tables. | |
6398 | ||
6399 | ------------------------ | |
6400 | -- Copy_Secondary_DTs -- | |
6401 | ------------------------ | |
6402 | ||
6403 | procedure Copy_Secondary_DTs (Typ : Entity_Id) is | |
6404 | E : Entity_Id; | |
6405 | Iface : Elmt_Id; | |
6406 | ||
6407 | begin | |
6408 | -- Climb to the ancestor (if any) handling private types | |
6409 | ||
6410 | if Present (Full_View (Etype (Typ))) then | |
6411 | if Full_View (Etype (Typ)) /= Typ then | |
6412 | Copy_Secondary_DTs (Full_View (Etype (Typ))); | |
6413 | end if; | |
10b93b2e | 6414 | |
bfef8d0d JM |
6415 | elsif Etype (Typ) /= Typ then |
6416 | Copy_Secondary_DTs (Etype (Typ)); | |
6417 | end if; | |
10b93b2e | 6418 | |
ce2b6ba5 JM |
6419 | if Present (Interfaces (Typ)) |
6420 | and then not Is_Empty_Elmt_List (Interfaces (Typ)) | |
bfef8d0d | 6421 | then |
ce2b6ba5 | 6422 | Iface := First_Elmt (Interfaces (Typ)); |
bfef8d0d JM |
6423 | E := First_Entity (Typ); |
6424 | while Present (E) | |
6425 | and then Present (Node (Sec_DT_Ancestor)) | |
d0dd5209 | 6426 | and then Ekind (Node (Sec_DT_Ancestor)) = E_Constant |
bfef8d0d JM |
6427 | loop |
6428 | if Is_Tag (E) and then Chars (E) /= Name_uTag then | |
80b992ae HK |
6429 | declare |
6430 | Num_Prims : constant Int := | |
6431 | UI_To_Int (DT_Entry_Count (E)); | |
6432 | ||
6433 | begin | |
6434 | if not Is_Interface (Etype (Typ)) then | |
6435 | ||
6436 | -- Inherit first secondary dispatch table | |
6437 | ||
6438 | Append_To (Elab_Code, | |
6439 | Build_Inherit_Predefined_Prims (Loc, | |
6440 | Old_Tag_Node => | |
6441 | Unchecked_Convert_To (RTE (RE_Tag), | |
e4494292 | 6442 | New_Occurrence_Of |
1923d2d6 JM |
6443 | (Node |
6444 | (Next_Elmt (Sec_DT_Ancestor)), | |
6445 | Loc)), | |
80b992ae HK |
6446 | New_Tag_Node => |
6447 | Unchecked_Convert_To (RTE (RE_Tag), | |
e4494292 | 6448 | New_Occurrence_Of |
1923d2d6 | 6449 | (Node (Next_Elmt (Sec_DT_Typ)), |
bd5ed03a JM |
6450 | Loc)), |
6451 | Num_Predef_Prims => | |
6452 | Number_Of_Predefined_Prims | |
6453 | (Parent_Typ))); | |
80b992ae HK |
6454 | |
6455 | if Num_Prims /= 0 then | |
6456 | Append_To (Elab_Code, | |
6457 | Build_Inherit_Prims (Loc, | |
6458 | Typ => Node (Iface), | |
6459 | Old_Tag_Node => | |
6460 | Unchecked_Convert_To | |
6461 | (RTE (RE_Tag), | |
e4494292 | 6462 | New_Occurrence_Of |
80b992ae HK |
6463 | (Node (Sec_DT_Ancestor), |
6464 | Loc)), | |
6465 | New_Tag_Node => | |
6466 | Unchecked_Convert_To | |
6467 | (RTE (RE_Tag), | |
e4494292 | 6468 | New_Occurrence_Of |
80b992ae HK |
6469 | (Node (Sec_DT_Typ), Loc)), |
6470 | Num_Prims => Num_Prims)); | |
6471 | end if; | |
6472 | end if; | |
6473 | ||
6474 | Next_Elmt (Sec_DT_Ancestor); | |
6475 | Next_Elmt (Sec_DT_Typ); | |
dee4682a | 6476 | |
1923d2d6 JM |
6477 | -- Skip the secondary dispatch table of |
6478 | -- predefined primitives | |
6479 | ||
6480 | Next_Elmt (Sec_DT_Ancestor); | |
6481 | Next_Elmt (Sec_DT_Typ); | |
6482 | ||
80b992ae HK |
6483 | if not Is_Interface (Etype (Typ)) then |
6484 | ||
6485 | -- Inherit second secondary dispatch table | |
dee4682a | 6486 | |
dee4682a JM |
6487 | Append_To (Elab_Code, |
6488 | Build_Inherit_Predefined_Prims (Loc, | |
6489 | Old_Tag_Node => | |
6490 | Unchecked_Convert_To (RTE (RE_Tag), | |
e4494292 | 6491 | New_Occurrence_Of |
1923d2d6 JM |
6492 | (Node |
6493 | (Next_Elmt (Sec_DT_Ancestor)), | |
6494 | Loc)), | |
dee4682a JM |
6495 | New_Tag_Node => |
6496 | Unchecked_Convert_To (RTE (RE_Tag), | |
e4494292 | 6497 | New_Occurrence_Of |
1923d2d6 | 6498 | (Node (Next_Elmt (Sec_DT_Typ)), |
bd5ed03a JM |
6499 | Loc)), |
6500 | Num_Predef_Prims => | |
6501 | Number_Of_Predefined_Prims | |
6502 | (Parent_Typ))); | |
dee4682a JM |
6503 | |
6504 | if Num_Prims /= 0 then | |
6505 | Append_To (Elab_Code, | |
6506 | Build_Inherit_Prims (Loc, | |
b2e1beb3 | 6507 | Typ => Node (Iface), |
dee4682a JM |
6508 | Old_Tag_Node => |
6509 | Unchecked_Convert_To | |
6510 | (RTE (RE_Tag), | |
e4494292 | 6511 | New_Occurrence_Of |
dee4682a JM |
6512 | (Node (Sec_DT_Ancestor), |
6513 | Loc)), | |
6514 | New_Tag_Node => | |
6515 | Unchecked_Convert_To | |
6516 | (RTE (RE_Tag), | |
e4494292 | 6517 | New_Occurrence_Of |
dee4682a | 6518 | (Node (Sec_DT_Typ), Loc)), |
b2e1beb3 | 6519 | Num_Prims => Num_Prims)); |
dee4682a | 6520 | end if; |
80b992ae HK |
6521 | end if; |
6522 | end; | |
bfef8d0d JM |
6523 | |
6524 | Next_Elmt (Sec_DT_Ancestor); | |
6525 | Next_Elmt (Sec_DT_Typ); | |
1923d2d6 JM |
6526 | |
6527 | -- Skip the secondary dispatch table of | |
6528 | -- predefined primitives | |
6529 | ||
6530 | Next_Elmt (Sec_DT_Ancestor); | |
6531 | Next_Elmt (Sec_DT_Typ); | |
6532 | ||
bfef8d0d JM |
6533 | Next_Elmt (Iface); |
6534 | end if; | |
10b93b2e | 6535 | |
bfef8d0d JM |
6536 | Next_Entity (E); |
6537 | end loop; | |
6538 | end if; | |
6539 | end Copy_Secondary_DTs; | |
10b93b2e | 6540 | |
bfef8d0d | 6541 | begin |
d0dd5209 JM |
6542 | if Present (Node (Sec_DT_Ancestor)) |
6543 | and then Ekind (Node (Sec_DT_Ancestor)) = E_Constant | |
6544 | then | |
bfef8d0d | 6545 | -- Handle private types |
f4d379b8 | 6546 | |
bfef8d0d JM |
6547 | if Present (Full_View (Typ)) then |
6548 | Copy_Secondary_DTs (Full_View (Typ)); | |
6549 | else | |
6550 | Copy_Secondary_DTs (Typ); | |
6551 | end if; | |
f4d379b8 | 6552 | end if; |
bfef8d0d JM |
6553 | end; |
6554 | end if; | |
f4d379b8 | 6555 | end if; |
dee4682a | 6556 | end if; |
10b93b2e | 6557 | |
36295779 AC |
6558 | -- Generate code to check if the external tag of this type is the same |
6559 | -- as the external tag of some other declaration. | |
8c4ee6f5 AC |
6560 | |
6561 | -- Check_TSD (TSD'Unrestricted_Access); | |
6562 | ||
e526d0c7 AC |
6563 | -- This check is a consequence of AI05-0113-1/06, so it officially |
6564 | -- applies to Ada 2005 (and Ada 2012). It might be argued that it is | |
6565 | -- a desirable check to add in Ada 95 mode, but we hesitate to make | |
6566 | -- this change, as it would be incompatible, and could conceivably | |
51ab2a39 | 6567 | -- cause a problem in existing Ada 95 code. |
e526d0c7 AC |
6568 | |
6569 | -- We check for No_Run_Time_Mode here, because we do not want to pick | |
6570 | -- up the RE_Check_TSD entity and call it in No_Run_Time mode. | |
5ad4969d | 6571 | |
b00baef5 JM |
6572 | -- We cannot perform this check if the generation of its expanded name |
6573 | -- was discarded. | |
6574 | ||
8c4ee6f5 | 6575 | if not No_Run_Time_Mode |
51ab2a39 | 6576 | and then not Discard_Names |
e526d0c7 | 6577 | and then Ada_Version >= Ada_2005 |
8c4ee6f5 | 6578 | and then RTE_Available (RE_Check_TSD) |
59f4d038 | 6579 | and then not Duplicated_Tag_Checks_Suppressed (Typ) |
8c4ee6f5 AC |
6580 | then |
6581 | Append_To (Elab_Code, | |
6582 | Make_Procedure_Call_Statement (Loc, | |
36295779 AC |
6583 | Name => |
6584 | New_Occurrence_Of (RTE (RE_Check_TSD), Loc), | |
8c4ee6f5 AC |
6585 | Parameter_Associations => New_List ( |
6586 | Make_Attribute_Reference (Loc, | |
36295779 | 6587 | Prefix => New_Occurrence_Of (TSD, Loc), |
8c4ee6f5 AC |
6588 | Attribute_Name => Name_Unchecked_Access)))); |
6589 | end if; | |
6590 | ||
dee4682a JM |
6591 | -- Generate code to register the Tag in the External_Tag hash table for |
6592 | -- the pure Ada type only. | |
10b93b2e | 6593 | |
dee4682a | 6594 | -- Register_Tag (Dt_Ptr); |
10b93b2e | 6595 | |
d0dd5209 JM |
6596 | -- Skip this action in the following cases: |
6597 | -- 1) if Register_Tag is not available. | |
6598 | -- 2) in No_Run_Time mode. | |
5b7dd52d | 6599 | -- 3) if Typ is not defined at the library level (this is required |
d0dd5209 JM |
6600 | -- to avoid adding concurrency control to the hash table used |
6601 | -- by the run-time to register the tags). | |
10b93b2e | 6602 | |
80b992ae HK |
6603 | if not No_Run_Time_Mode |
6604 | and then Is_Library_Level_Entity (Typ) | |
6605 | and then RTE_Available (RE_Register_Tag) | |
6606 | then | |
d0dd5209 | 6607 | Append_To (Elab_Code, |
80b992ae | 6608 | Make_Procedure_Call_Statement (Loc, |
6782b1ef AC |
6609 | Name => |
6610 | New_Occurrence_Of (RTE (RE_Register_Tag), Loc), | |
80b992ae | 6611 | Parameter_Associations => |
e4494292 | 6612 | New_List (New_Occurrence_Of (DT_Ptr, Loc)))); |
10b93b2e HK |
6613 | end if; |
6614 | ||
5b7dd52d JM |
6615 | if not Is_Empty_List (Elab_Code) then |
6616 | Append_List_To (Result, Elab_Code); | |
6617 | end if; | |
80b992ae | 6618 | |
c09a557e AC |
6619 | -- Populate the two auxiliary tables used for dispatching asynchronous, |
6620 | -- conditional and timed selects for synchronized types that implement | |
6621 | -- a limited interface. Skip this step in Ravenscar profile or when | |
6622 | -- general dispatching is forbidden. | |
b2e1beb3 | 6623 | |
0791fbe9 | 6624 | if Ada_Version >= Ada_2005 |
b2e1beb3 | 6625 | and then Is_Concurrent_Record_Type (Typ) |
ce2b6ba5 | 6626 | and then Has_Interfaces (Typ) |
c09a557e AC |
6627 | and then not Restriction_Active (No_Dispatching_Calls) |
6628 | and then not Restriction_Active (No_Select_Statements) | |
b2e1beb3 ES |
6629 | then |
6630 | Append_List_To (Result, | |
6631 | Make_Select_Specific_Data_Table (Typ)); | |
6632 | end if; | |
6633 | ||
f2cbd970 | 6634 | -- Remember entities containing dispatch tables |
1923d2d6 | 6635 | |
f2cbd970 JM |
6636 | Append_Elmt (Predef_Prims, DT_Decl); |
6637 | Append_Elmt (DT, DT_Decl); | |
1923d2d6 | 6638 | |
d0dd5209 | 6639 | Analyze_List (Result, Suppress => All_Checks); |
b2e1beb3 ES |
6640 | Set_Has_Dispatch_Table (Typ); |
6641 | ||
b16d9747 JM |
6642 | -- Mark entities containing dispatch tables. Required by the backend to |
6643 | -- handle them properly. | |
f2cbd970 | 6644 | |
87dc09cb | 6645 | if Has_DT (Typ) then |
f2cbd970 JM |
6646 | declare |
6647 | Elmt : Elmt_Id; | |
6648 | ||
6649 | begin | |
f2cbd970 JM |
6650 | -- Object declarations |
6651 | ||
6652 | Elmt := First_Elmt (DT_Decl); | |
6653 | while Present (Elmt) loop | |
6654 | Set_Is_Dispatch_Table_Entity (Node (Elmt)); | |
6655 | pragma Assert (Ekind (Etype (Node (Elmt))) = E_Array_Subtype | |
6656 | or else Ekind (Etype (Node (Elmt))) = E_Record_Subtype); | |
6657 | Set_Is_Dispatch_Table_Entity (Etype (Node (Elmt))); | |
6658 | Next_Elmt (Elmt); | |
6659 | end loop; | |
6660 | ||
6661 | -- Aggregates initializing dispatch tables | |
6662 | ||
6663 | Elmt := First_Elmt (DT_Aggr); | |
6664 | while Present (Elmt) loop | |
6665 | Set_Is_Dispatch_Table_Entity (Etype (Node (Elmt))); | |
6666 | Next_Elmt (Elmt); | |
6667 | end loop; | |
6668 | end; | |
6669 | end if; | |
6670 | ||
d65a80fd | 6671 | <<Leave_SCIL>> |
078b1a5f | 6672 | |
9c41193c JM |
6673 | -- Register the tagged type in the call graph nodes table |
6674 | ||
6675 | Register_CG_Node (Typ); | |
6676 | ||
d65a80fd | 6677 | <<Leave>> |
9057bd6a | 6678 | Restore_Ghost_Region (Saved_GM, Saved_IGR); |
d65a80fd | 6679 | |
f4d379b8 HK |
6680 | return Result; |
6681 | end Make_DT; | |
10b93b2e | 6682 | |
f4d379b8 HK |
6683 | ------------------------------------- |
6684 | -- Make_Select_Specific_Data_Table -- | |
6685 | ------------------------------------- | |
10b93b2e | 6686 | |
f4d379b8 HK |
6687 | function Make_Select_Specific_Data_Table |
6688 | (Typ : Entity_Id) return List_Id | |
6689 | is | |
6690 | Assignments : constant List_Id := New_List; | |
6691 | Loc : constant Source_Ptr := Sloc (Typ); | |
10b93b2e | 6692 | |
b0efe69e | 6693 | Conc_Typ : Entity_Id; |
1f8766d3 | 6694 | Decls : List_Id := No_List; |
b0efe69e JM |
6695 | Prim : Entity_Id; |
6696 | Prim_Als : Entity_Id; | |
6697 | Prim_Elmt : Elmt_Id; | |
6698 | Prim_Pos : Uint; | |
dee4682a | 6699 | Nb_Prim : Nat := 0; |
10b93b2e | 6700 | |
f4d379b8 | 6701 | type Examined_Array is array (Int range <>) of Boolean; |
10b93b2e | 6702 | |
f4d379b8 HK |
6703 | function Find_Entry_Index (E : Entity_Id) return Uint; |
6704 | -- Given an entry, find its index in the visible declarations of the | |
6705 | -- corresponding concurrent type of Typ. | |
10b93b2e | 6706 | |
f4d379b8 HK |
6707 | ---------------------- |
6708 | -- Find_Entry_Index -- | |
6709 | ---------------------- | |
10b93b2e | 6710 | |
f4d379b8 | 6711 | function Find_Entry_Index (E : Entity_Id) return Uint is |
7faaabcc PT |
6712 | Index : Uint := Uint_0; |
6713 | Subp_Decl : Node_Id; | |
10b93b2e | 6714 | |
f4d379b8 | 6715 | begin |
7faaabcc PT |
6716 | Subp_Decl := First (Decls); |
6717 | while Present (Subp_Decl) loop | |
6718 | if Nkind (Subp_Decl) = N_Entry_Declaration then | |
6719 | Index := Index + 1; | |
10b93b2e | 6720 | |
7faaabcc PT |
6721 | if Defining_Identifier (Subp_Decl) = E then |
6722 | exit; | |
f4d379b8 | 6723 | end if; |
10b93b2e | 6724 | |
7faaabcc PT |
6725 | end if; |
6726 | ||
6727 | Next (Subp_Decl); | |
6728 | end loop; | |
10b93b2e | 6729 | |
7faaabcc | 6730 | return Index; |
f4d379b8 HK |
6731 | end Find_Entry_Index; |
6732 | ||
e8374e7a AC |
6733 | -- Local variables |
6734 | ||
6735 | Tag_Node : Node_Id; | |
6736 | ||
f4d379b8 HK |
6737 | -- Start of processing for Make_Select_Specific_Data_Table |
6738 | ||
6739 | begin | |
b0efe69e JM |
6740 | pragma Assert (not Restriction_Active (No_Dispatching_Calls)); |
6741 | ||
f4d379b8 HK |
6742 | if Present (Corresponding_Concurrent_Type (Typ)) then |
6743 | Conc_Typ := Corresponding_Concurrent_Type (Typ); | |
6744 | ||
b2e1beb3 ES |
6745 | if Present (Full_View (Conc_Typ)) then |
6746 | Conc_Typ := Full_View (Conc_Typ); | |
6747 | end if; | |
6748 | ||
f4d379b8 HK |
6749 | if Ekind (Conc_Typ) = E_Protected_Type then |
6750 | Decls := Visible_Declarations (Protected_Definition ( | |
6751 | Parent (Conc_Typ))); | |
10b93b2e HK |
6752 | else |
6753 | pragma Assert (Ekind (Conc_Typ) = E_Task_Type); | |
f4d379b8 HK |
6754 | Decls := Visible_Declarations (Task_Definition ( |
6755 | Parent (Conc_Typ))); | |
6756 | end if; | |
6757 | end if; | |
10b93b2e | 6758 | |
f4d379b8 | 6759 | -- Count the non-predefined primitive operations |
10b93b2e | 6760 | |
f4d379b8 HK |
6761 | Prim_Elmt := First_Elmt (Primitive_Operations (Typ)); |
6762 | while Present (Prim_Elmt) loop | |
bfef8d0d JM |
6763 | Prim := Node (Prim_Elmt); |
6764 | ||
6765 | if not (Is_Predefined_Dispatching_Operation (Prim) | |
6766 | or else Is_Predefined_Dispatching_Alias (Prim)) | |
6767 | then | |
f4d379b8 HK |
6768 | Nb_Prim := Nb_Prim + 1; |
6769 | end if; | |
10b93b2e | 6770 | |
f4d379b8 HK |
6771 | Next_Elmt (Prim_Elmt); |
6772 | end loop; | |
10b93b2e | 6773 | |
f4d379b8 | 6774 | declare |
b0efe69e | 6775 | Examined : Examined_Array (1 .. Nb_Prim) := (others => False); |
10b93b2e | 6776 | |
f4d379b8 HK |
6777 | begin |
6778 | Prim_Elmt := First_Elmt (Primitive_Operations (Typ)); | |
6779 | while Present (Prim_Elmt) loop | |
6780 | Prim := Node (Prim_Elmt); | |
10b93b2e | 6781 | |
bfef8d0d | 6782 | -- Look for primitive overriding an abstract interface subprogram |
10b93b2e | 6783 | |
ce2b6ba5 | 6784 | if Present (Interface_Alias (Prim)) |
b4d7b435 AC |
6785 | and then not |
6786 | Is_Ancestor | |
4ac2477e JM |
6787 | (Find_Dispatching_Type (Interface_Alias (Prim)), Typ, |
6788 | Use_Full_View => True) | |
bfef8d0d JM |
6789 | and then not Examined (UI_To_Int (DT_Position (Alias (Prim)))) |
6790 | then | |
6791 | Prim_Pos := DT_Position (Alias (Prim)); | |
6792 | pragma Assert (UI_To_Int (Prim_Pos) <= Nb_Prim); | |
6793 | Examined (UI_To_Int (Prim_Pos)) := True; | |
10b93b2e | 6794 | |
bfef8d0d JM |
6795 | -- Set the primitive operation kind regardless of subprogram |
6796 | -- type. Generate: | |
6797 | -- Ada.Tags.Set_Prim_Op_Kind (DT_Ptr, <position>, <kind>); | |
10b93b2e | 6798 | |
e8374e7a AC |
6799 | if Tagged_Type_Expansion then |
6800 | Tag_Node := | |
e4494292 | 6801 | New_Occurrence_Of |
e8374e7a AC |
6802 | (Node (First_Elmt (Access_Disp_Table (Typ))), Loc); |
6803 | ||
6804 | else | |
6805 | Tag_Node := | |
6806 | Make_Attribute_Reference (Loc, | |
e4494292 | 6807 | Prefix => New_Occurrence_Of (Typ, Loc), |
e8374e7a AC |
6808 | Attribute_Name => Name_Tag); |
6809 | end if; | |
6810 | ||
bfef8d0d | 6811 | Append_To (Assignments, |
d0dd5209 | 6812 | Make_Procedure_Call_Statement (Loc, |
e4494292 | 6813 | Name => New_Occurrence_Of (RTE (RE_Set_Prim_Op_Kind), Loc), |
d0dd5209 | 6814 | Parameter_Associations => New_List ( |
e8374e7a | 6815 | Tag_Node, |
d0dd5209 JM |
6816 | Make_Integer_Literal (Loc, Prim_Pos), |
6817 | Prim_Op_Kind (Alias (Prim), Typ)))); | |
b0efe69e | 6818 | |
bfef8d0d | 6819 | -- Retrieve the root of the alias chain |
b0efe69e | 6820 | |
b81a5940 | 6821 | Prim_Als := Ultimate_Alias (Prim); |
b0efe69e | 6822 | |
bfef8d0d | 6823 | -- In the case of an entry wrapper, set the entry index |
b0efe69e | 6824 | |
bfef8d0d JM |
6825 | if Ekind (Prim) = E_Procedure |
6826 | and then Is_Primitive_Wrapper (Prim_Als) | |
6827 | and then Ekind (Wrapped_Entity (Prim_Als)) = E_Entry | |
6828 | then | |
6829 | -- Generate: | |
6830 | -- Ada.Tags.Set_Entry_Index | |
6831 | -- (DT_Ptr, <position>, <index>); | |
b0efe69e | 6832 | |
e8374e7a AC |
6833 | if Tagged_Type_Expansion then |
6834 | Tag_Node := | |
e4494292 | 6835 | New_Occurrence_Of |
7b9db926 | 6836 | (Node (First_Elmt (Access_Disp_Table (Typ))), Loc); |
e8374e7a AC |
6837 | else |
6838 | Tag_Node := | |
6839 | Make_Attribute_Reference (Loc, | |
e4494292 | 6840 | Prefix => New_Occurrence_Of (Typ, Loc), |
e8374e7a AC |
6841 | Attribute_Name => Name_Tag); |
6842 | end if; | |
6843 | ||
bfef8d0d | 6844 | Append_To (Assignments, |
d0dd5209 JM |
6845 | Make_Procedure_Call_Statement (Loc, |
6846 | Name => | |
e4494292 | 6847 | New_Occurrence_Of (RTE (RE_Set_Entry_Index), Loc), |
d0dd5209 | 6848 | Parameter_Associations => New_List ( |
e8374e7a | 6849 | Tag_Node, |
d0dd5209 JM |
6850 | Make_Integer_Literal (Loc, Prim_Pos), |
6851 | Make_Integer_Literal (Loc, | |
6852 | Find_Entry_Index (Wrapped_Entity (Prim_Als)))))); | |
f4d379b8 HK |
6853 | end if; |
6854 | end if; | |
6855 | ||
f4d379b8 HK |
6856 | Next_Elmt (Prim_Elmt); |
6857 | end loop; | |
6858 | end; | |
6859 | ||
6860 | return Assignments; | |
6861 | end Make_Select_Specific_Data_Table; | |
10b93b2e | 6862 | |
b2e1beb3 ES |
6863 | --------------- |
6864 | -- Make_Tags -- | |
6865 | --------------- | |
6866 | ||
6867 | function Make_Tags (Typ : Entity_Id) return List_Id is | |
b16d9747 JM |
6868 | Loc : constant Source_Ptr := Sloc (Typ); |
6869 | Result : constant List_Id := New_List; | |
6870 | ||
6871 | procedure Import_DT | |
6872 | (Tag_Typ : Entity_Id; | |
6873 | DT : Entity_Id; | |
6874 | Is_Secondary_DT : Boolean); | |
6875 | -- Import the dispatch table DT of tagged type Tag_Typ. Required to | |
6876 | -- generate forward references and statically allocate the table. For | |
6877 | -- primary dispatch tables that require no dispatch table generate: | |
c95e0edc | 6878 | |
b16d9747 | 6879 | -- DT : static aliased constant Non_Dispatch_Table_Wrapper; |
c95e0edc AC |
6880 | -- pragma Import (Ada, DT); |
6881 | ||
b16d9747 | 6882 | -- Otherwise generate: |
c95e0edc | 6883 | |
b16d9747 | 6884 | -- DT : static aliased constant Dispatch_Table_Wrapper (Nb_Prim); |
c95e0edc | 6885 | -- pragma Import (Ada, DT); |
7986e000 | 6886 | |
b16d9747 JM |
6887 | --------------- |
6888 | -- Import_DT -- | |
6889 | --------------- | |
e18d6a15 | 6890 | |
b16d9747 JM |
6891 | procedure Import_DT |
6892 | (Tag_Typ : Entity_Id; | |
6893 | DT : Entity_Id; | |
6894 | Is_Secondary_DT : Boolean) | |
6895 | is | |
6896 | DT_Constr_List : List_Id; | |
6897 | Nb_Prim : Nat; | |
e18d6a15 | 6898 | |
b16d9747 JM |
6899 | begin |
6900 | Set_Is_Imported (DT); | |
6901 | Set_Ekind (DT, E_Constant); | |
6902 | Set_Related_Type (DT, Typ); | |
e18d6a15 | 6903 | |
e18d6a15 JM |
6904 | -- The scope must be set now to call Get_External_Name |
6905 | ||
6906 | Set_Scope (DT, Current_Scope); | |
6907 | ||
93582885 | 6908 | Get_External_Name (DT); |
e18d6a15 | 6909 | Set_Interface_Name (DT, |
c95e0edc | 6910 | Make_String_Literal (Loc, Strval => String_From_Name_Buffer)); |
b2e1beb3 | 6911 | |
e18d6a15 | 6912 | -- Ensure proper Sprint output of this implicit importation |
b2e1beb3 | 6913 | |
e18d6a15 | 6914 | Set_Is_Internal (DT); |
b2e1beb3 | 6915 | |
e18d6a15 JM |
6916 | -- Save this entity to allow Make_DT to generate its exportation |
6917 | ||
b16d9747 | 6918 | Append_Elmt (DT, Dispatch_Table_Wrappers (Typ)); |
e18d6a15 | 6919 | |
b16d9747 | 6920 | -- No dispatch table required |
1923d2d6 | 6921 | |
c95e0edc | 6922 | if not Is_Secondary_DT and then not Has_DT (Tag_Typ) then |
b16d9747 JM |
6923 | Append_To (Result, |
6924 | Make_Object_Declaration (Loc, | |
6925 | Defining_Identifier => DT, | |
6926 | Aliased_Present => True, | |
6927 | Constant_Present => True, | |
6928 | Object_Definition => | |
e4494292 RD |
6929 | New_Occurrence_Of |
6930 | (RTE (RE_No_Dispatch_Table_Wrapper), Loc))); | |
b16d9747 JM |
6931 | |
6932 | else | |
e18d6a15 JM |
6933 | -- Calculate the number of primitives of the dispatch table and |
6934 | -- the size of the Type_Specific_Data record. | |
6935 | ||
b16d9747 JM |
6936 | Nb_Prim := |
6937 | UI_To_Int (DT_Entry_Count (First_Tag_Component (Tag_Typ))); | |
e18d6a15 | 6938 | |
c95e0edc AC |
6939 | -- If the tagged type has no primitives we add a dummy slot whose |
6940 | -- address will be the tag of this type. | |
e18d6a15 JM |
6941 | |
6942 | if Nb_Prim = 0 then | |
6943 | DT_Constr_List := | |
6944 | New_List (Make_Integer_Literal (Loc, 1)); | |
6945 | else | |
6946 | DT_Constr_List := | |
6947 | New_List (Make_Integer_Literal (Loc, Nb_Prim)); | |
6948 | end if; | |
6949 | ||
6950 | Append_To (Result, | |
6951 | Make_Object_Declaration (Loc, | |
6952 | Defining_Identifier => DT, | |
6953 | Aliased_Present => True, | |
6954 | Constant_Present => True, | |
6955 | Object_Definition => | |
6956 | Make_Subtype_Indication (Loc, | |
6957 | Subtype_Mark => | |
e4494292 | 6958 | New_Occurrence_Of (RTE (RE_Dispatch_Table_Wrapper), Loc), |
e18d6a15 JM |
6959 | Constraint => Make_Index_Or_Discriminant_Constraint (Loc, |
6960 | Constraints => DT_Constr_List)))); | |
b16d9747 JM |
6961 | end if; |
6962 | end Import_DT; | |
6963 | ||
6964 | -- Local variables | |
6965 | ||
6966 | Tname : constant Name_Id := Chars (Typ); | |
6967 | AI_Tag_Comp : Elmt_Id; | |
901ad63f | 6968 | DT : Node_Id := Empty; |
b16d9747 JM |
6969 | DT_Ptr : Node_Id; |
6970 | Predef_Prims_Ptr : Node_Id; | |
c679a915 | 6971 | Iface_DT : Node_Id := Empty; |
b16d9747 | 6972 | Iface_DT_Ptr : Node_Id; |
327503f1 | 6973 | New_Node : Node_Id; |
b16d9747 JM |
6974 | Suffix_Index : Int; |
6975 | Typ_Name : Name_Id; | |
6976 | Typ_Comps : Elist_Id; | |
6977 | ||
6978 | -- Start of processing for Make_Tags | |
6979 | ||
6980 | begin | |
cefce34c JM |
6981 | pragma Assert (No (Access_Disp_Table (Typ))); |
6982 | Set_Access_Disp_Table (Typ, New_Elmt_List); | |
b16d9747 | 6983 | |
fe683ef6 AC |
6984 | -- If the elaboration of this tagged type needs a boolean flag then |
6985 | -- define now its entity. It is initialized to True to indicate that | |
6986 | -- elaboration is still pending; set to False by the IP routine. | |
6987 | ||
6988 | -- TypFxx : boolean := True; | |
6989 | ||
6990 | if Elab_Flag_Needed (Typ) then | |
6991 | Set_Access_Disp_Table_Elab_Flag (Typ, | |
6992 | Make_Defining_Identifier (Loc, | |
ed323421 | 6993 | Chars => New_External_Name (Tname, 'F'))); |
fe683ef6 AC |
6994 | |
6995 | Append_To (Result, | |
6996 | Make_Object_Declaration (Loc, | |
6997 | Defining_Identifier => Access_Disp_Table_Elab_Flag (Typ), | |
6998 | Object_Definition => New_Occurrence_Of (Standard_Boolean, Loc), | |
6999 | Expression => New_Occurrence_Of (Standard_True, Loc))); | |
7000 | end if; | |
7001 | ||
b16d9747 JM |
7002 | -- 1) Generate the primary tag entities |
7003 | ||
7004 | -- Primary dispatch table containing user-defined primitives | |
7005 | ||
cefce34c JM |
7006 | DT_Ptr := Make_Defining_Identifier (Loc, New_External_Name (Tname, 'P')); |
7007 | Set_Etype (DT_Ptr, RTE (RE_Tag)); | |
7008 | Append_Elmt (DT_Ptr, Access_Disp_Table (Typ)); | |
b16d9747 | 7009 | |
cefce34c | 7010 | -- Minimum decoration |
b16d9747 | 7011 | |
cefce34c JM |
7012 | Set_Ekind (DT_Ptr, E_Variable); |
7013 | Set_Related_Type (DT_Ptr, Typ); | |
b16d9747 | 7014 | |
6782b1ef | 7015 | -- Notify back end that the types are associated with a dispatch table |
e3b3266c AC |
7016 | |
7017 | Set_Is_Dispatch_Table_Entity (RTE (RE_Prim_Ptr)); | |
7018 | Set_Is_Dispatch_Table_Entity (RTE (RE_Predef_Prims_Table_Ptr)); | |
7019 | ||
cefce34c | 7020 | -- For CPP types there is no need to build the dispatch tables since |
a8cc3e46 RD |
7021 | -- they are imported from the C++ side. If the CPP type has an IP then |
7022 | -- we declare now the variable that will store the copy of the C++ tag. | |
c95e0edc AC |
7023 | -- If the CPP type is an interface, we need the variable as well because |
7024 | -- it becomes the pointer to the corresponding secondary table. | |
b16d9747 | 7025 | |
cefce34c | 7026 | if Is_CPP_Class (Typ) then |
a8cc3e46 | 7027 | if Has_CPP_Constructors (Typ) or else Is_Interface (Typ) then |
e18d6a15 JM |
7028 | Append_To (Result, |
7029 | Make_Object_Declaration (Loc, | |
7030 | Defining_Identifier => DT_Ptr, | |
e4494292 | 7031 | Object_Definition => New_Occurrence_Of (RTE (RE_Tag), Loc), |
e18d6a15 JM |
7032 | Expression => |
7033 | Unchecked_Convert_To (RTE (RE_Tag), | |
e4494292 | 7034 | New_Occurrence_Of (RTE (RE_Null_Address), Loc)))); |
e18d6a15 | 7035 | |
cefce34c JM |
7036 | Set_Is_Statically_Allocated (DT_Ptr, |
7037 | Is_Library_Level_Tagged_Type (Typ)); | |
7038 | end if; | |
97cb64f0 | 7039 | |
cefce34c | 7040 | -- Ada types |
81d93365 | 7041 | |
cefce34c JM |
7042 | else |
7043 | -- Primary dispatch table containing predefined primitives | |
1923d2d6 | 7044 | |
cefce34c JM |
7045 | Predef_Prims_Ptr := |
7046 | Make_Defining_Identifier (Loc, | |
7047 | Chars => New_External_Name (Tname, 'Y')); | |
7048 | Set_Etype (Predef_Prims_Ptr, RTE (RE_Address)); | |
7049 | Append_Elmt (Predef_Prims_Ptr, Access_Disp_Table (Typ)); | |
e18d6a15 | 7050 | |
cefce34c | 7051 | -- Import the forward declaration of the Dispatch Table wrapper |
c95e0edc | 7052 | -- record (Make_DT will take care of exporting it). |
e18d6a15 | 7053 | |
cefce34c JM |
7054 | if Building_Static_DT (Typ) then |
7055 | Set_Dispatch_Table_Wrappers (Typ, New_Elmt_List); | |
b2e1beb3 | 7056 | |
cefce34c JM |
7057 | DT := |
7058 | Make_Defining_Identifier (Loc, | |
7059 | Chars => New_External_Name (Tname, 'T')); | |
7060 | ||
7061 | Import_DT (Typ, DT, Is_Secondary_DT => False); | |
7062 | ||
7063 | if Has_DT (Typ) then | |
7064 | Append_To (Result, | |
7065 | Make_Object_Declaration (Loc, | |
7066 | Defining_Identifier => DT_Ptr, | |
7067 | Constant_Present => True, | |
e4494292 RD |
7068 | Object_Definition => |
7069 | New_Occurrence_Of (RTE (RE_Tag), Loc), | |
cf7bb903 | 7070 | Expression => |
cefce34c JM |
7071 | Unchecked_Convert_To (RTE (RE_Tag), |
7072 | Make_Attribute_Reference (Loc, | |
cf7bb903 | 7073 | Prefix => |
cefce34c | 7074 | Make_Selected_Component (Loc, |
e4494292 | 7075 | Prefix => New_Occurrence_Of (DT, Loc), |
cf7bb903 RD |
7076 | Selector_Name => |
7077 | New_Occurrence_Of | |
7078 | (RTE_Record_Component (RE_Prims_Ptr), Loc)), | |
cefce34c JM |
7079 | Attribute_Name => Name_Address)))); |
7080 | ||
7081 | -- Generate the SCIL node for the previous object declaration | |
7082 | -- because it has a tag initialization. | |
7083 | ||
7084 | if Generate_SCIL then | |
7085 | New_Node := | |
7086 | Make_SCIL_Dispatch_Table_Tag_Init (Sloc (Last (Result))); | |
7087 | Set_SCIL_Entity (New_Node, Typ); | |
7088 | Set_SCIL_Node (Last (Result), New_Node); | |
7089 | end if; | |
7090 | ||
7091 | Append_To (Result, | |
7092 | Make_Object_Declaration (Loc, | |
7093 | Defining_Identifier => Predef_Prims_Ptr, | |
7094 | Constant_Present => True, | |
cf7bb903 | 7095 | Object_Definition => |
e4494292 | 7096 | New_Occurrence_Of (RTE (RE_Address), Loc), |
cf7bb903 | 7097 | Expression => |
cefce34c | 7098 | Make_Attribute_Reference (Loc, |
cf7bb903 | 7099 | Prefix => |
cefce34c | 7100 | Make_Selected_Component (Loc, |
e4494292 | 7101 | Prefix => New_Occurrence_Of (DT, Loc), |
cf7bb903 RD |
7102 | Selector_Name => |
7103 | New_Occurrence_Of | |
7104 | (RTE_Record_Component (RE_Predef_Prims), Loc)), | |
cefce34c JM |
7105 | Attribute_Name => Name_Address))); |
7106 | ||
7107 | -- No dispatch table required | |
7108 | ||
7109 | else | |
7110 | Append_To (Result, | |
7111 | Make_Object_Declaration (Loc, | |
7112 | Defining_Identifier => DT_Ptr, | |
7113 | Constant_Present => True, | |
e4494292 RD |
7114 | Object_Definition => |
7115 | New_Occurrence_Of (RTE (RE_Tag), Loc), | |
cf7bb903 | 7116 | Expression => |
cefce34c JM |
7117 | Unchecked_Convert_To (RTE (RE_Tag), |
7118 | Make_Attribute_Reference (Loc, | |
cf7bb903 | 7119 | Prefix => |
cefce34c | 7120 | Make_Selected_Component (Loc, |
e4494292 | 7121 | Prefix => New_Occurrence_Of (DT, Loc), |
cf7bb903 RD |
7122 | Selector_Name => |
7123 | New_Occurrence_Of | |
7124 | (RTE_Record_Component (RE_NDT_Prims_Ptr), | |
7125 | Loc)), | |
cefce34c JM |
7126 | Attribute_Name => Name_Address)))); |
7127 | end if; | |
7128 | ||
7129 | Set_Is_True_Constant (DT_Ptr); | |
7130 | Set_Is_Statically_Allocated (DT_Ptr); | |
7131 | end if; | |
7132 | end if; | |
b2e1beb3 ES |
7133 | |
7134 | -- 2) Generate the secondary tag entities | |
7135 | ||
cefce34c JM |
7136 | -- Collect the components associated with secondary dispatch tables |
7137 | ||
ce2b6ba5 | 7138 | if Has_Interfaces (Typ) then |
cefce34c | 7139 | Collect_Interface_Components (Typ, Typ_Comps); |
b16d9747 | 7140 | |
c95e0edc AC |
7141 | -- For each interface type we build a unique external name associated |
7142 | -- with its secondary dispatch table. This name is used to declare an | |
7143 | -- object that references this secondary dispatch table, whose value | |
7144 | -- will be used for the elaboration of Typ objects, and also for the | |
7145 | -- elaboration of objects of types derived from Typ that do not | |
7146 | -- override the primitives of this interface type. | |
b16d9747 JM |
7147 | |
7148 | Suffix_Index := 1; | |
b2e1beb3 | 7149 | |
6782b1ef AC |
7150 | -- Note: The value of Suffix_Index must be in sync with the values of |
7151 | -- Suffix_Index in secondary dispatch tables generated by Make_DT. | |
b2e1beb3 | 7152 | |
cefce34c JM |
7153 | if Is_CPP_Class (Typ) then |
7154 | AI_Tag_Comp := First_Elmt (Typ_Comps); | |
7155 | while Present (AI_Tag_Comp) loop | |
7156 | Get_Secondary_DT_External_Name | |
7157 | (Typ, Related_Type (Node (AI_Tag_Comp)), Suffix_Index); | |
7158 | Typ_Name := Name_Find; | |
b2e1beb3 | 7159 | |
6782b1ef | 7160 | -- Declare variables to store copy of the C++ secondary tags |
b16d9747 | 7161 | |
cefce34c JM |
7162 | Iface_DT_Ptr := |
7163 | Make_Defining_Identifier (Loc, | |
7164 | Chars => New_External_Name (Typ_Name, 'P')); | |
7165 | Set_Etype (Iface_DT_Ptr, RTE (RE_Interface_Tag)); | |
7166 | Set_Ekind (Iface_DT_Ptr, E_Variable); | |
7167 | Set_Is_Tag (Iface_DT_Ptr); | |
1923d2d6 | 7168 | |
cefce34c JM |
7169 | Set_Has_Thunks (Iface_DT_Ptr); |
7170 | Set_Related_Type | |
7171 | (Iface_DT_Ptr, Related_Type (Node (AI_Tag_Comp))); | |
7172 | Append_Elmt (Iface_DT_Ptr, Access_Disp_Table (Typ)); | |
80b992ae | 7173 | |
b16d9747 JM |
7174 | Append_To (Result, |
7175 | Make_Object_Declaration (Loc, | |
7176 | Defining_Identifier => Iface_DT_Ptr, | |
e4494292 | 7177 | Object_Definition => New_Occurrence_Of |
b16d9747 JM |
7178 | (RTE (RE_Interface_Tag), Loc), |
7179 | Expression => | |
7180 | Unchecked_Convert_To (RTE (RE_Interface_Tag), | |
e4494292 | 7181 | New_Occurrence_Of (RTE (RE_Null_Address), Loc)))); |
b16d9747 | 7182 | |
cefce34c JM |
7183 | Set_Is_Statically_Allocated (Iface_DT_Ptr, |
7184 | Is_Library_Level_Tagged_Type (Typ)); | |
1923d2d6 | 7185 | |
cefce34c JM |
7186 | Next_Elmt (AI_Tag_Comp); |
7187 | end loop; | |
1923d2d6 | 7188 | |
cefce34c | 7189 | -- This is not a CPP_Class type |
1923d2d6 | 7190 | |
cefce34c JM |
7191 | else |
7192 | AI_Tag_Comp := First_Elmt (Typ_Comps); | |
7193 | while Present (AI_Tag_Comp) loop | |
7194 | Get_Secondary_DT_External_Name | |
7195 | (Typ, Related_Type (Node (AI_Tag_Comp)), Suffix_Index); | |
7196 | Typ_Name := Name_Find; | |
b2e1beb3 | 7197 | |
cefce34c JM |
7198 | if Building_Static_DT (Typ) then |
7199 | Iface_DT := | |
7200 | Make_Defining_Identifier (Loc, | |
8d4611f7 | 7201 | Chars => New_External_Name (Typ_Name, 'T')); |
cefce34c JM |
7202 | Import_DT |
7203 | (Tag_Typ => Related_Type (Node (AI_Tag_Comp)), | |
7204 | DT => Iface_DT, | |
7205 | Is_Secondary_DT => True); | |
7206 | end if; | |
1923d2d6 | 7207 | |
cefce34c JM |
7208 | -- Secondary dispatch table referencing thunks to user-defined |
7209 | -- primitives covered by this interface. | |
1923d2d6 | 7210 | |
cefce34c JM |
7211 | Iface_DT_Ptr := |
7212 | Make_Defining_Identifier (Loc, | |
7213 | Chars => New_External_Name (Typ_Name, 'P')); | |
7214 | Set_Etype (Iface_DT_Ptr, RTE (RE_Interface_Tag)); | |
7215 | Set_Ekind (Iface_DT_Ptr, E_Constant); | |
7216 | Set_Is_Tag (Iface_DT_Ptr); | |
7217 | Set_Has_Thunks (Iface_DT_Ptr); | |
7218 | Set_Is_Statically_Allocated (Iface_DT_Ptr, | |
7219 | Is_Library_Level_Tagged_Type (Typ)); | |
7220 | Set_Is_True_Constant (Iface_DT_Ptr); | |
7221 | Set_Related_Type | |
7222 | (Iface_DT_Ptr, Related_Type (Node (AI_Tag_Comp))); | |
7223 | Append_Elmt (Iface_DT_Ptr, Access_Disp_Table (Typ)); | |
7224 | ||
7225 | if Building_Static_DT (Typ) then | |
7226 | Append_To (Result, | |
7227 | Make_Object_Declaration (Loc, | |
7228 | Defining_Identifier => Iface_DT_Ptr, | |
7229 | Constant_Present => True, | |
e4494292 | 7230 | Object_Definition => New_Occurrence_Of |
cefce34c | 7231 | (RTE (RE_Interface_Tag), Loc), |
cf7bb903 | 7232 | Expression => |
cefce34c JM |
7233 | Unchecked_Convert_To (RTE (RE_Interface_Tag), |
7234 | Make_Attribute_Reference (Loc, | |
cf7bb903 | 7235 | Prefix => |
cefce34c | 7236 | Make_Selected_Component (Loc, |
cf7bb903 | 7237 | Prefix => |
e4494292 | 7238 | New_Occurrence_Of (Iface_DT, Loc), |
cf7bb903 RD |
7239 | Selector_Name => |
7240 | New_Occurrence_Of | |
7241 | (RTE_Record_Component (RE_Prims_Ptr), | |
7242 | Loc)), | |
cefce34c JM |
7243 | Attribute_Name => Name_Address)))); |
7244 | end if; | |
7245 | ||
7246 | -- Secondary dispatch table referencing thunks to predefined | |
7247 | -- primitives. | |
7248 | ||
7249 | Iface_DT_Ptr := | |
7250 | Make_Defining_Identifier (Loc, | |
7251 | Chars => New_External_Name (Typ_Name, 'Y')); | |
7252 | Set_Etype (Iface_DT_Ptr, RTE (RE_Address)); | |
7253 | Set_Ekind (Iface_DT_Ptr, E_Constant); | |
7254 | Set_Is_Tag (Iface_DT_Ptr); | |
7255 | Set_Has_Thunks (Iface_DT_Ptr); | |
7256 | Set_Is_Statically_Allocated (Iface_DT_Ptr, | |
7257 | Is_Library_Level_Tagged_Type (Typ)); | |
7258 | Set_Is_True_Constant (Iface_DT_Ptr); | |
7259 | Set_Related_Type | |
7260 | (Iface_DT_Ptr, Related_Type (Node (AI_Tag_Comp))); | |
7261 | Append_Elmt (Iface_DT_Ptr, Access_Disp_Table (Typ)); | |
7262 | ||
7263 | -- Secondary dispatch table referencing user-defined primitives | |
7264 | -- covered by this interface. | |
7265 | ||
7266 | Iface_DT_Ptr := | |
7267 | Make_Defining_Identifier (Loc, | |
7268 | Chars => New_External_Name (Typ_Name, 'D')); | |
7269 | Set_Etype (Iface_DT_Ptr, RTE (RE_Interface_Tag)); | |
7270 | Set_Ekind (Iface_DT_Ptr, E_Constant); | |
7271 | Set_Is_Tag (Iface_DT_Ptr); | |
7272 | Set_Is_Statically_Allocated (Iface_DT_Ptr, | |
7273 | Is_Library_Level_Tagged_Type (Typ)); | |
7274 | Set_Is_True_Constant (Iface_DT_Ptr); | |
7275 | Set_Related_Type | |
7276 | (Iface_DT_Ptr, Related_Type (Node (AI_Tag_Comp))); | |
7277 | Append_Elmt (Iface_DT_Ptr, Access_Disp_Table (Typ)); | |
7278 | ||
7279 | -- Secondary dispatch table referencing predefined primitives | |
7280 | ||
7281 | Iface_DT_Ptr := | |
7282 | Make_Defining_Identifier (Loc, | |
7283 | Chars => New_External_Name (Typ_Name, 'Z')); | |
7284 | Set_Etype (Iface_DT_Ptr, RTE (RE_Address)); | |
7285 | Set_Ekind (Iface_DT_Ptr, E_Constant); | |
7286 | Set_Is_Tag (Iface_DT_Ptr); | |
7287 | Set_Is_Statically_Allocated (Iface_DT_Ptr, | |
7288 | Is_Library_Level_Tagged_Type (Typ)); | |
7289 | Set_Is_True_Constant (Iface_DT_Ptr); | |
7290 | Set_Related_Type | |
7291 | (Iface_DT_Ptr, Related_Type (Node (AI_Tag_Comp))); | |
7292 | Append_Elmt (Iface_DT_Ptr, Access_Disp_Table (Typ)); | |
7293 | ||
7294 | Next_Elmt (AI_Tag_Comp); | |
7295 | end loop; | |
7296 | end if; | |
b2e1beb3 ES |
7297 | end if; |
7298 | ||
0e41a941 AC |
7299 | -- 3) At the end of Access_Disp_Table, if the type has user-defined |
7300 | -- primitives, we add the entity of an access type declaration that | |
7301 | -- is used by Build_Get_Prim_Op_Address to expand dispatching calls | |
7302 | -- through the primary dispatch table. | |
7303 | ||
9c852dfb | 7304 | if DT_Entry_Count (First_Tag_Component (Typ)) = 0 then |
0e41a941 | 7305 | Analyze_List (Result); |
b2e1beb3 ES |
7306 | |
7307 | -- Generate: | |
02fd37f5 | 7308 | -- subtype Typ_DT is Address_Array (1 .. Nb_Prims); |
b2e1beb3 ES |
7309 | -- type Typ_DT_Acc is access Typ_DT; |
7310 | ||
0e41a941 AC |
7311 | else |
7312 | declare | |
7313 | Name_DT_Prims : constant Name_Id := | |
7314 | New_External_Name (Tname, 'G'); | |
7315 | Name_DT_Prims_Acc : constant Name_Id := | |
7316 | New_External_Name (Tname, 'H'); | |
7317 | DT_Prims : constant Entity_Id := | |
7318 | Make_Defining_Identifier (Loc, | |
7319 | Name_DT_Prims); | |
7320 | DT_Prims_Acc : constant Entity_Id := | |
7321 | Make_Defining_Identifier (Loc, | |
7322 | Name_DT_Prims_Acc); | |
7323 | begin | |
7324 | Append_To (Result, | |
02fd37f5 | 7325 | Make_Subtype_Declaration (Loc, |
0e41a941 | 7326 | Defining_Identifier => DT_Prims, |
02fd37f5 EB |
7327 | Subtype_Indication => |
7328 | Make_Subtype_Indication (Loc, | |
7329 | Subtype_Mark => | |
7330 | New_Occurrence_Of (RTE (RE_Address_Array), Loc), | |
61770974 | 7331 | Constraint => |
02fd37f5 EB |
7332 | Make_Index_Or_Discriminant_Constraint (Loc, New_List ( |
7333 | Make_Range (Loc, | |
7334 | Low_Bound => Make_Integer_Literal (Loc, 1), | |
61770974 HK |
7335 | High_Bound => |
7336 | Make_Integer_Literal (Loc, | |
7337 | DT_Entry_Count | |
7338 | (First_Tag_Component (Typ))))))))); | |
b2e1beb3 | 7339 | |
0e41a941 AC |
7340 | Append_To (Result, |
7341 | Make_Full_Type_Declaration (Loc, | |
7342 | Defining_Identifier => DT_Prims_Acc, | |
61770974 | 7343 | Type_Definition => |
0e41a941 AC |
7344 | Make_Access_To_Object_Definition (Loc, |
7345 | Subtype_Indication => | |
7346 | New_Occurrence_Of (DT_Prims, Loc)))); | |
b2e1beb3 | 7347 | |
0e41a941 | 7348 | Append_Elmt (DT_Prims_Acc, Access_Disp_Table (Typ)); |
b2e1beb3 | 7349 | |
0e41a941 AC |
7350 | -- Analyze the resulting list and suppress the generation of the |
7351 | -- Init_Proc associated with the above array declaration because | |
7352 | -- this type is never used in object declarations. It is only used | |
7353 | -- to simplify the expansion associated with dispatching calls. | |
b2e1beb3 | 7354 | |
0e41a941 | 7355 | Analyze_List (Result); |
5b1e6aca | 7356 | Set_Suppress_Initialization (Base_Type (DT_Prims)); |
f2cbd970 | 7357 | |
d151d6a3 AC |
7358 | -- Disable backend optimizations based on assumptions about the |
7359 | -- aliasing status of objects designated by the access to the | |
7360 | -- dispatch table. Required to handle dispatch tables imported | |
7361 | -- from C++. | |
7362 | ||
7363 | Set_No_Strict_Aliasing (Base_Type (DT_Prims_Acc)); | |
7364 | ||
cefce34c JM |
7365 | -- Add the freezing nodes of these declarations; required to avoid |
7366 | -- generating these freezing nodes in wrong scopes (for example in | |
7367 | -- the IC routine of a derivation of Typ). | |
6782b1ef | 7368 | |
c95e0edc | 7369 | -- What is an "IC routine"? Is "init_proc" meant here??? |
cefce34c | 7370 | |
c159409f AC |
7371 | Append_List_To (Result, Freeze_Entity (DT_Prims, Typ)); |
7372 | Append_List_To (Result, Freeze_Entity (DT_Prims_Acc, Typ)); | |
cefce34c | 7373 | |
0e41a941 AC |
7374 | -- Mark entity of dispatch table. Required by the back end to |
7375 | -- handle them properly. | |
f2cbd970 | 7376 | |
0e41a941 AC |
7377 | Set_Is_Dispatch_Table_Entity (DT_Prims); |
7378 | end; | |
7379 | end if; | |
b2e1beb3 | 7380 | |
3c1ecd7e AC |
7381 | -- Mark entities of dispatch table. Required by the back end to handle |
7382 | -- them properly. | |
901ad63f EB |
7383 | |
7384 | if Present (DT) then | |
7385 | Set_Is_Dispatch_Table_Entity (DT); | |
7386 | Set_Is_Dispatch_Table_Entity (Etype (DT)); | |
7387 | end if; | |
7388 | ||
c679a915 EB |
7389 | if Present (Iface_DT) then |
7390 | Set_Is_Dispatch_Table_Entity (Iface_DT); | |
7391 | Set_Is_Dispatch_Table_Entity (Etype (Iface_DT)); | |
7392 | end if; | |
7393 | ||
cefce34c JM |
7394 | if Is_CPP_Class (Root_Type (Typ)) then |
7395 | Set_Ekind (DT_Ptr, E_Variable); | |
7396 | else | |
7397 | Set_Ekind (DT_Ptr, E_Constant); | |
7398 | end if; | |
7399 | ||
80b992ae HK |
7400 | Set_Is_Tag (DT_Ptr); |
7401 | Set_Related_Type (DT_Ptr, Typ); | |
7402 | ||
b2e1beb3 ES |
7403 | return Result; |
7404 | end Make_Tags; | |
7405 | ||
5a1ccfb1 AC |
7406 | --------------- |
7407 | -- New_Value -- | |
7408 | --------------- | |
7409 | ||
7410 | function New_Value (From : Node_Id) return Node_Id is | |
7411 | Res : constant Node_Id := Duplicate_Subexpr (From); | |
7412 | begin | |
7413 | if Is_Access_Type (Etype (From)) then | |
6782b1ef | 7414 | return Make_Explicit_Dereference (Sloc (From), Prefix => Res); |
5a1ccfb1 AC |
7415 | else |
7416 | return Res; | |
7417 | end if; | |
7418 | end New_Value; | |
7419 | ||
70482933 RK |
7420 | ----------------------------------- |
7421 | -- Original_View_In_Visible_Part -- | |
7422 | ----------------------------------- | |
7423 | ||
7424 | function Original_View_In_Visible_Part (Typ : Entity_Id) return Boolean is | |
7425 | Scop : constant Entity_Id := Scope (Typ); | |
7426 | ||
7427 | begin | |
7428 | -- The scope must be a package | |
7429 | ||
b9b2405f | 7430 | if not Is_Package_Or_Generic_Package (Scop) then |
70482933 RK |
7431 | return False; |
7432 | end if; | |
7433 | ||
7434 | -- A type with a private declaration has a private view declared in | |
7435 | -- the visible part. | |
7436 | ||
7437 | if Has_Private_Declaration (Typ) then | |
7438 | return True; | |
7439 | end if; | |
7440 | ||
7441 | return List_Containing (Parent (Typ)) = | |
d12b19fa | 7442 | Visible_Declarations (Package_Specification (Scop)); |
70482933 RK |
7443 | end Original_View_In_Visible_Part; |
7444 | ||
10b93b2e HK |
7445 | ------------------ |
7446 | -- Prim_Op_Kind -- | |
7447 | ------------------ | |
7448 | ||
7449 | function Prim_Op_Kind | |
7450 | (Prim : Entity_Id; | |
7451 | Typ : Entity_Id) return Node_Id | |
7452 | is | |
7453 | Full_Typ : Entity_Id := Typ; | |
7454 | Loc : constant Source_Ptr := Sloc (Prim); | |
b0efe69e | 7455 | Prim_Op : Entity_Id; |
10b93b2e HK |
7456 | |
7457 | begin | |
7458 | -- Retrieve the original primitive operation | |
7459 | ||
b81a5940 | 7460 | Prim_Op := Ultimate_Alias (Prim); |
10b93b2e HK |
7461 | |
7462 | if Ekind (Typ) = E_Record_Type | |
7463 | and then Present (Corresponding_Concurrent_Type (Typ)) | |
7464 | then | |
7465 | Full_Typ := Corresponding_Concurrent_Type (Typ); | |
7466 | end if; | |
7467 | ||
2653cbda HK |
7468 | -- When a private tagged type is completed by a concurrent type, |
7469 | -- retrieve the full view. | |
7470 | ||
7471 | if Is_Private_Type (Full_Typ) then | |
7472 | Full_Typ := Full_View (Full_Typ); | |
7473 | end if; | |
7474 | ||
10b93b2e HK |
7475 | if Ekind (Prim_Op) = E_Function then |
7476 | ||
7477 | -- Protected function | |
7478 | ||
7479 | if Ekind (Full_Typ) = E_Protected_Type then | |
e4494292 | 7480 | return New_Occurrence_Of (RTE (RE_POK_Protected_Function), Loc); |
10b93b2e | 7481 | |
f4d379b8 HK |
7482 | -- Task function |
7483 | ||
7484 | elsif Ekind (Full_Typ) = E_Task_Type then | |
e4494292 | 7485 | return New_Occurrence_Of (RTE (RE_POK_Task_Function), Loc); |
f4d379b8 | 7486 | |
10b93b2e HK |
7487 | -- Regular function |
7488 | ||
7489 | else | |
e4494292 | 7490 | return New_Occurrence_Of (RTE (RE_POK_Function), Loc); |
10b93b2e HK |
7491 | end if; |
7492 | ||
7493 | else | |
7494 | pragma Assert (Ekind (Prim_Op) = E_Procedure); | |
7495 | ||
7496 | if Ekind (Full_Typ) = E_Protected_Type then | |
7497 | ||
7498 | -- Protected entry | |
7499 | ||
7500 | if Is_Primitive_Wrapper (Prim_Op) | |
7501 | and then Ekind (Wrapped_Entity (Prim_Op)) = E_Entry | |
7502 | then | |
e4494292 | 7503 | return New_Occurrence_Of (RTE (RE_POK_Protected_Entry), Loc); |
10b93b2e HK |
7504 | |
7505 | -- Protected procedure | |
7506 | ||
7507 | else | |
e4494292 RD |
7508 | return |
7509 | New_Occurrence_Of (RTE (RE_POK_Protected_Procedure), Loc); | |
10b93b2e HK |
7510 | end if; |
7511 | ||
7512 | elsif Ekind (Full_Typ) = E_Task_Type then | |
7513 | ||
7514 | -- Task entry | |
7515 | ||
7516 | if Is_Primitive_Wrapper (Prim_Op) | |
7517 | and then Ekind (Wrapped_Entity (Prim_Op)) = E_Entry | |
7518 | then | |
e4494292 | 7519 | return New_Occurrence_Of (RTE (RE_POK_Task_Entry), Loc); |
10b93b2e HK |
7520 | |
7521 | -- Task "procedure". These are the internally Expander-generated | |
7522 | -- procedures (task body for instance). | |
7523 | ||
7524 | else | |
e4494292 | 7525 | return New_Occurrence_Of (RTE (RE_POK_Task_Procedure), Loc); |
10b93b2e HK |
7526 | end if; |
7527 | ||
7528 | -- Regular procedure | |
7529 | ||
7530 | else | |
e4494292 | 7531 | return New_Occurrence_Of (RTE (RE_POK_Procedure), Loc); |
10b93b2e HK |
7532 | end if; |
7533 | end if; | |
7534 | end Prim_Op_Kind; | |
7535 | ||
d0dd5209 JM |
7536 | ------------------------ |
7537 | -- Register_Primitive -- | |
7538 | ------------------------ | |
7539 | ||
991395ab | 7540 | function Register_Primitive |
d0dd5209 | 7541 | (Loc : Source_Ptr; |
991395ab | 7542 | Prim : Entity_Id) return List_Id |
d0dd5209 | 7543 | is |
80b992ae HK |
7544 | DT_Ptr : Entity_Id; |
7545 | Iface_Prim : Entity_Id; | |
7546 | Iface_Typ : Entity_Id; | |
7547 | Iface_DT_Ptr : Entity_Id; | |
7548 | Iface_DT_Elmt : Elmt_Id; | |
991395ab | 7549 | L : constant List_Id := New_List; |
80b992ae HK |
7550 | Pos : Uint; |
7551 | Tag : Entity_Id; | |
f2cbd970 | 7552 | Tag_Typ : Entity_Id; |
80b992ae HK |
7553 | Thunk_Id : Entity_Id; |
7554 | Thunk_Code : Node_Id; | |
d0dd5209 JM |
7555 | |
7556 | begin | |
7557 | pragma Assert (not Restriction_Active (No_Dispatching_Calls)); | |
7558 | ||
9e9df9da AC |
7559 | -- Do not register in the dispatch table eliminated primitives |
7560 | ||
7561 | if not RTE_Available (RE_Tag) | |
7562 | or else Is_Eliminated (Ultimate_Alias (Prim)) | |
078b1a5f | 7563 | or else Generate_SCIL |
9e9df9da | 7564 | then |
991395ab | 7565 | return L; |
d0dd5209 JM |
7566 | end if; |
7567 | ||
ce2b6ba5 | 7568 | if not Present (Interface_Alias (Prim)) then |
f2cbd970 | 7569 | Tag_Typ := Scope (DTC_Entity (Prim)); |
1923d2d6 | 7570 | Pos := DT_Position (Prim); |
f2cbd970 | 7571 | Tag := First_Tag_Component (Tag_Typ); |
d0dd5209 JM |
7572 | |
7573 | if Is_Predefined_Dispatching_Operation (Prim) | |
7574 | or else Is_Predefined_Dispatching_Alias (Prim) | |
7575 | then | |
f2cbd970 JM |
7576 | DT_Ptr := |
7577 | Node (Next_Elmt (First_Elmt (Access_Disp_Table (Tag_Typ)))); | |
7578 | ||
991395ab | 7579 | Append_To (L, |
d0dd5209 | 7580 | Build_Set_Predefined_Prim_Op_Address (Loc, |
e4494292 | 7581 | Tag_Node => New_Occurrence_Of (DT_Ptr, Loc), |
d0dd5209 | 7582 | Position => Pos, |
1923d2d6 | 7583 | Address_Node => |
f2cbd970 | 7584 | Unchecked_Convert_To (RTE (RE_Prim_Ptr), |
1923d2d6 | 7585 | Make_Attribute_Reference (Loc, |
e4494292 | 7586 | Prefix => New_Occurrence_Of (Prim, Loc), |
1923d2d6 | 7587 | Attribute_Name => Name_Unrestricted_Access)))); |
d0dd5209 | 7588 | |
5f143024 | 7589 | -- Register copy of the pointer to the 'size primitive in the TSD |
f2cbd970 JM |
7590 | |
7591 | if Chars (Prim) = Name_uSize | |
7592 | and then RTE_Record_Component_Available (RE_Size_Func) | |
7593 | then | |
7594 | DT_Ptr := Node (First_Elmt (Access_Disp_Table (Tag_Typ))); | |
991395ab | 7595 | Append_To (L, |
f2cbd970 | 7596 | Build_Set_Size_Function (Loc, |
e4494292 | 7597 | Tag_Node => New_Occurrence_Of (DT_Ptr, Loc), |
f2cbd970 JM |
7598 | Size_Func => Prim)); |
7599 | end if; | |
7600 | ||
d0dd5209 JM |
7601 | else |
7602 | pragma Assert (Pos /= Uint_0 and then Pos <= DT_Entry_Count (Tag)); | |
7603 | ||
cefce34c JM |
7604 | -- Skip registration of primitives located in the C++ part of the |
7605 | -- dispatch table. Their slot is set by the IC routine. | |
7606 | ||
7607 | if not Is_CPP_Class (Root_Type (Tag_Typ)) | |
7608 | or else Pos > CPP_Num_Prims (Tag_Typ) | |
7609 | then | |
7610 | DT_Ptr := Node (First_Elmt (Access_Disp_Table (Tag_Typ))); | |
7611 | Append_To (L, | |
7612 | Build_Set_Prim_Op_Address (Loc, | |
7613 | Typ => Tag_Typ, | |
e4494292 | 7614 | Tag_Node => New_Occurrence_Of (DT_Ptr, Loc), |
cefce34c JM |
7615 | Position => Pos, |
7616 | Address_Node => | |
7617 | Unchecked_Convert_To (RTE (RE_Prim_Ptr), | |
7618 | Make_Attribute_Reference (Loc, | |
e4494292 | 7619 | Prefix => New_Occurrence_Of (Prim, Loc), |
cefce34c JM |
7620 | Attribute_Name => Name_Unrestricted_Access)))); |
7621 | end if; | |
d0dd5209 JM |
7622 | end if; |
7623 | ||
7624 | -- Ada 2005 (AI-251): Primitive associated with an interface type | |
6782b1ef | 7625 | |
d0dd5209 JM |
7626 | -- Generate the code of the thunk only if the interface type is not an |
7627 | -- immediate ancestor of Typ; otherwise the dispatch table associated | |
7628 | -- with the interface is the primary dispatch table and we have nothing | |
7629 | -- else to do here. | |
7630 | ||
7631 | else | |
f2cbd970 | 7632 | Tag_Typ := Find_Dispatching_Type (Alias (Prim)); |
ce2b6ba5 | 7633 | Iface_Typ := Find_Dispatching_Type (Interface_Alias (Prim)); |
d0dd5209 JM |
7634 | |
7635 | pragma Assert (Is_Interface (Iface_Typ)); | |
7636 | ||
b4d7b435 AC |
7637 | -- No action needed for interfaces that are ancestors of Typ because |
7638 | -- their primitives are located in the primary dispatch table. | |
7639 | ||
4ac2477e | 7640 | if Is_Ancestor (Iface_Typ, Tag_Typ, Use_Full_View => True) then |
b4d7b435 | 7641 | return L; |
cefce34c JM |
7642 | |
7643 | -- No action needed for primitives located in the C++ part of the | |
7644 | -- dispatch table. Their slot is set by the IC routine. | |
7645 | ||
7646 | elsif Is_CPP_Class (Root_Type (Tag_Typ)) | |
7647 | and then DT_Position (Alias (Prim)) <= CPP_Num_Prims (Tag_Typ) | |
7648 | and then not Is_Predefined_Dispatching_Operation (Prim) | |
7649 | and then not Is_Predefined_Dispatching_Alias (Prim) | |
7650 | then | |
7651 | return L; | |
b4d7b435 AC |
7652 | end if; |
7653 | ||
20dc266e | 7654 | Expand_Interface_Thunk (Prim, Thunk_Id, Thunk_Code, Iface_Typ); |
d0dd5209 | 7655 | |
4ac2477e | 7656 | if not Is_Ancestor (Iface_Typ, Tag_Typ, Use_Full_View => True) |
d0dd5209 JM |
7657 | and then Present (Thunk_Code) |
7658 | then | |
d0dd5209 JM |
7659 | -- Generate the code necessary to fill the appropriate entry of |
7660 | -- the secondary dispatch table of Prim's controlling type with | |
7661 | -- Thunk_Id's address. | |
7662 | ||
f2cbd970 | 7663 | Iface_DT_Elmt := Find_Interface_ADT (Tag_Typ, Iface_Typ); |
80b992ae HK |
7664 | Iface_DT_Ptr := Node (Iface_DT_Elmt); |
7665 | pragma Assert (Has_Thunks (Iface_DT_Ptr)); | |
7666 | ||
ce2b6ba5 | 7667 | Iface_Prim := Interface_Alias (Prim); |
1923d2d6 JM |
7668 | Pos := DT_Position (Iface_Prim); |
7669 | Tag := First_Tag_Component (Iface_Typ); | |
991395ab AC |
7670 | |
7671 | Prepend_To (L, Thunk_Code); | |
d0dd5209 JM |
7672 | |
7673 | if Is_Predefined_Dispatching_Operation (Prim) | |
7674 | or else Is_Predefined_Dispatching_Alias (Prim) | |
7675 | then | |
80b992ae | 7676 | Append_To (L, |
d0dd5209 | 7677 | Build_Set_Predefined_Prim_Op_Address (Loc, |
1923d2d6 | 7678 | Tag_Node => |
e4494292 | 7679 | New_Occurrence_Of (Node (Next_Elmt (Iface_DT_Elmt)), Loc), |
d0dd5209 JM |
7680 | Position => Pos, |
7681 | Address_Node => | |
f2cbd970 | 7682 | Unchecked_Convert_To (RTE (RE_Prim_Ptr), |
1923d2d6 | 7683 | Make_Attribute_Reference (Loc, |
e4494292 | 7684 | Prefix => New_Occurrence_Of (Thunk_Id, Loc), |
1923d2d6 | 7685 | Attribute_Name => Name_Unrestricted_Access)))); |
80b992ae | 7686 | |
1923d2d6 | 7687 | Next_Elmt (Iface_DT_Elmt); |
80b992ae HK |
7688 | Next_Elmt (Iface_DT_Elmt); |
7689 | Iface_DT_Ptr := Node (Iface_DT_Elmt); | |
7690 | pragma Assert (not Has_Thunks (Iface_DT_Ptr)); | |
7691 | ||
7692 | Append_To (L, | |
7693 | Build_Set_Predefined_Prim_Op_Address (Loc, | |
1923d2d6 | 7694 | Tag_Node => |
e4494292 | 7695 | New_Occurrence_Of (Node (Next_Elmt (Iface_DT_Elmt)), Loc), |
80b992ae HK |
7696 | Position => Pos, |
7697 | Address_Node => | |
f2cbd970 | 7698 | Unchecked_Convert_To (RTE (RE_Prim_Ptr), |
1923d2d6 | 7699 | Make_Attribute_Reference (Loc, |
cf7bb903 | 7700 | Prefix => |
e4494292 | 7701 | New_Occurrence_Of (Alias (Prim), Loc), |
1923d2d6 | 7702 | Attribute_Name => Name_Unrestricted_Access)))); |
80b992ae | 7703 | |
d0dd5209 JM |
7704 | else |
7705 | pragma Assert (Pos /= Uint_0 | |
7706 | and then Pos <= DT_Entry_Count (Tag)); | |
7707 | ||
80b992ae HK |
7708 | Append_To (L, |
7709 | Build_Set_Prim_Op_Address (Loc, | |
7710 | Typ => Iface_Typ, | |
e4494292 | 7711 | Tag_Node => New_Occurrence_Of (Iface_DT_Ptr, Loc), |
80b992ae | 7712 | Position => Pos, |
1923d2d6 | 7713 | Address_Node => |
f2cbd970 | 7714 | Unchecked_Convert_To (RTE (RE_Prim_Ptr), |
1923d2d6 | 7715 | Make_Attribute_Reference (Loc, |
e4494292 | 7716 | Prefix => New_Occurrence_Of (Thunk_Id, Loc), |
1923d2d6 | 7717 | Attribute_Name => Name_Unrestricted_Access)))); |
80b992ae | 7718 | |
1923d2d6 | 7719 | Next_Elmt (Iface_DT_Elmt); |
80b992ae HK |
7720 | Next_Elmt (Iface_DT_Elmt); |
7721 | Iface_DT_Ptr := Node (Iface_DT_Elmt); | |
7722 | pragma Assert (not Has_Thunks (Iface_DT_Ptr)); | |
7723 | ||
7724 | Append_To (L, | |
d0dd5209 JM |
7725 | Build_Set_Prim_Op_Address (Loc, |
7726 | Typ => Iface_Typ, | |
e4494292 | 7727 | Tag_Node => New_Occurrence_Of (Iface_DT_Ptr, Loc), |
d0dd5209 | 7728 | Position => Pos, |
1923d2d6 | 7729 | Address_Node => |
f2cbd970 | 7730 | Unchecked_Convert_To (RTE (RE_Prim_Ptr), |
1923d2d6 | 7731 | Make_Attribute_Reference (Loc, |
cf7bb903 | 7732 | Prefix => |
4a0e6ac1 | 7733 | New_Occurrence_Of (Ultimate_Alias (Prim), Loc), |
1923d2d6 | 7734 | Attribute_Name => Name_Unrestricted_Access)))); |
80b992ae | 7735 | |
d0dd5209 JM |
7736 | end if; |
7737 | end if; | |
7738 | end if; | |
991395ab AC |
7739 | |
7740 | return L; | |
d0dd5209 JM |
7741 | end Register_Primitive; |
7742 | ||
70482933 RK |
7743 | ------------------------- |
7744 | -- Set_All_DT_Position -- | |
7745 | ------------------------- | |
7746 | ||
7747 | procedure Set_All_DT_Position (Typ : Entity_Id) is | |
70482933 | 7748 | |
44a10091 AC |
7749 | function In_Predef_Prims_DT (Prim : Entity_Id) return Boolean; |
7750 | -- Returns True if Prim is located in the dispatch table of | |
7751 | -- predefined primitives | |
7752 | ||
758c442c | 7753 | procedure Validate_Position (Prim : Entity_Id); |
6782b1ef AC |
7754 | -- Check that position assigned to Prim is completely safe (it has not |
7755 | -- been assigned to a previously defined primitive operation of Typ). | |
758c442c | 7756 | |
44a10091 AC |
7757 | ------------------------ |
7758 | -- In_Predef_Prims_DT -- | |
7759 | ------------------------ | |
7760 | ||
7761 | function In_Predef_Prims_DT (Prim : Entity_Id) return Boolean is | |
44a10091 AC |
7762 | begin |
7763 | -- Predefined primitives | |
7764 | ||
7765 | if Is_Predefined_Dispatching_Operation (Prim) then | |
7766 | return True; | |
7767 | ||
7768 | -- Renamings of predefined primitives | |
7769 | ||
7770 | elsif Present (Alias (Prim)) | |
7771 | and then Is_Predefined_Dispatching_Operation (Ultimate_Alias (Prim)) | |
7772 | then | |
7773 | if Chars (Ultimate_Alias (Prim)) /= Name_Op_Eq then | |
7774 | return True; | |
7775 | ||
b55993b3 AC |
7776 | -- An overriding operation that is a user-defined renaming of |
7777 | -- predefined equality inherits its slot from the overridden | |
7778 | -- operation. Otherwise it is treated as a predefined op and | |
7779 | -- occupies the same predefined slot as equality. A call to it is | |
7780 | -- transformed into a call to its alias, which is the predefined | |
7781 | -- equality op. A dispatching call thus uses the proper slot if | |
7782 | -- operation is further inherited and called with class-wide | |
7783 | -- arguments. | |
44a10091 AC |
7784 | |
7785 | else | |
b55993b3 AC |
7786 | return |
7787 | not Comes_From_Source (Prim) | |
7788 | or else No (Overridden_Operation (Prim)); | |
44a10091 AC |
7789 | end if; |
7790 | ||
7791 | -- User-defined primitives | |
7792 | ||
7793 | else | |
7794 | return False; | |
7795 | end if; | |
7796 | end In_Predef_Prims_DT; | |
7797 | ||
758c442c GD |
7798 | ----------------------- |
7799 | -- Validate_Position -- | |
7800 | ----------------------- | |
7801 | ||
7802 | procedure Validate_Position (Prim : Entity_Id) is | |
bfef8d0d JM |
7803 | Op_Elmt : Elmt_Id; |
7804 | Op : Entity_Id; | |
10b93b2e | 7805 | |
758c442c | 7806 | begin |
bfef8d0d JM |
7807 | -- Aliased primitives are safe |
7808 | ||
7809 | if Present (Alias (Prim)) then | |
7810 | return; | |
7811 | end if; | |
7812 | ||
7813 | Op_Elmt := First_Elmt (Primitive_Operations (Typ)); | |
7814 | while Present (Op_Elmt) loop | |
7815 | Op := Node (Op_Elmt); | |
7816 | ||
7817 | -- No need to check against itself | |
7818 | ||
7819 | if Op = Prim then | |
7820 | null; | |
7821 | ||
758c442c GD |
7822 | -- Primitive operations covering abstract interfaces are |
7823 | -- allocated later | |
7824 | ||
ce2b6ba5 | 7825 | elsif Present (Interface_Alias (Op)) then |
758c442c GD |
7826 | null; |
7827 | ||
b0efe69e JM |
7828 | -- Predefined dispatching operations are completely safe. They |
7829 | -- are allocated at fixed positions in a separate table. | |
758c442c | 7830 | |
bfef8d0d JM |
7831 | elsif Is_Predefined_Dispatching_Operation (Op) |
7832 | or else Is_Predefined_Dispatching_Alias (Op) | |
7833 | then | |
758c442c | 7834 | null; |
70482933 | 7835 | |
758c442c GD |
7836 | -- Aliased subprograms are safe |
7837 | ||
bfef8d0d | 7838 | elsif Present (Alias (Op)) then |
758c442c GD |
7839 | null; |
7840 | ||
bfef8d0d JM |
7841 | elsif DT_Position (Op) = DT_Position (Prim) |
7842 | and then not Is_Predefined_Dispatching_Operation (Op) | |
7843 | and then not Is_Predefined_Dispatching_Operation (Prim) | |
7844 | and then not Is_Predefined_Dispatching_Alias (Op) | |
7845 | and then not Is_Predefined_Dispatching_Alias (Prim) | |
7846 | then | |
10b93b2e HK |
7847 | -- Handle aliased subprograms |
7848 | ||
7849 | declare | |
7850 | Op_1 : Entity_Id; | |
7851 | Op_2 : Entity_Id; | |
7852 | ||
7853 | begin | |
bfef8d0d | 7854 | Op_1 := Op; |
10b93b2e HK |
7855 | loop |
7856 | if Present (Overridden_Operation (Op_1)) then | |
7857 | Op_1 := Overridden_Operation (Op_1); | |
7858 | elsif Present (Alias (Op_1)) then | |
7859 | Op_1 := Alias (Op_1); | |
7860 | else | |
7861 | exit; | |
7862 | end if; | |
7863 | end loop; | |
7864 | ||
7865 | Op_2 := Prim; | |
7866 | loop | |
7867 | if Present (Overridden_Operation (Op_2)) then | |
7868 | Op_2 := Overridden_Operation (Op_2); | |
7869 | elsif Present (Alias (Op_2)) then | |
7870 | Op_2 := Alias (Op_2); | |
7871 | else | |
7872 | exit; | |
7873 | end if; | |
7874 | end loop; | |
7875 | ||
7876 | if Op_1 /= Op_2 then | |
7877 | raise Program_Error; | |
7878 | end if; | |
7879 | end; | |
758c442c GD |
7880 | end if; |
7881 | ||
bfef8d0d | 7882 | Next_Elmt (Op_Elmt); |
758c442c GD |
7883 | end loop; |
7884 | end Validate_Position; | |
7885 | ||
bfef8d0d JM |
7886 | -- Local variables |
7887 | ||
7888 | Parent_Typ : constant Entity_Id := Etype (Typ); | |
bfef8d0d JM |
7889 | First_Prim : constant Elmt_Id := First_Elmt (Primitive_Operations (Typ)); |
7890 | The_Tag : constant Entity_Id := First_Tag_Component (Typ); | |
7891 | ||
dedac3eb RD |
7892 | Adjusted : Boolean := False; |
7893 | Finalized : Boolean := False; | |
bfef8d0d | 7894 | |
dee4682a JM |
7895 | Count_Prim : Nat; |
7896 | DT_Length : Nat; | |
7897 | Nb_Prim : Nat; | |
bfef8d0d JM |
7898 | Prim : Entity_Id; |
7899 | Prim_Elmt : Elmt_Id; | |
7900 | ||
758c442c GD |
7901 | -- Start of processing for Set_All_DT_Position |
7902 | ||
7903 | begin | |
ce2b6ba5 JM |
7904 | pragma Assert (Present (First_Tag_Component (Typ))); |
7905 | ||
16c5f1c6 RD |
7906 | -- Set the DT_Position for each primitive operation. Perform some sanity |
7907 | -- checks to avoid building inconsistent dispatch tables. | |
70482933 | 7908 | |
6782b1ef AC |
7909 | -- First stage: Set DTC entity of all the primitive operations. This is |
7910 | -- required to properly read the DT_Position attribute in latter stages. | |
70482933 | 7911 | |
dee4682a JM |
7912 | Prim_Elmt := First_Prim; |
7913 | Count_Prim := 0; | |
7914 | while Present (Prim_Elmt) loop | |
7915 | Prim := Node (Prim_Elmt); | |
70482933 | 7916 | |
dee4682a | 7917 | -- Predefined primitives have a separate dispatch table |
70482933 | 7918 | |
44a10091 | 7919 | if not In_Predef_Prims_DT (Prim) then |
dee4682a JM |
7920 | Count_Prim := Count_Prim + 1; |
7921 | end if; | |
70482933 | 7922 | |
d0dd5209 | 7923 | Set_DTC_Entity_Value (Typ, Prim); |
70482933 | 7924 | |
dee4682a JM |
7925 | -- Clear any previous value of the DT_Position attribute. In this |
7926 | -- way we ensure that the final position of all the primitives is | |
8fc789c8 | 7927 | -- established by the following stages of this algorithm. |
70482933 | 7928 | |
024d33d8 | 7929 | Set_DT_Position_Value (Prim, No_Uint); |
70482933 | 7930 | |
dee4682a JM |
7931 | Next_Elmt (Prim_Elmt); |
7932 | end loop; | |
70482933 | 7933 | |
dee4682a | 7934 | declare |
1923d2d6 JM |
7935 | Fixed_Prim : array (Int range 0 .. Count_Prim) of Boolean := |
7936 | (others => False); | |
7937 | ||
dee4682a | 7938 | E : Entity_Id; |
70482933 | 7939 | |
d0dd5209 JM |
7940 | procedure Handle_Inherited_Private_Subprograms (Typ : Entity_Id); |
7941 | -- Called if Typ is declared in a nested package or a public child | |
7942 | -- package to handle inherited primitives that were inherited by Typ | |
329ea7ec | 7943 | -- in the visible part, but whose declaration was deferred because |
d0dd5209 JM |
7944 | -- the parent operation was private and not visible at that point. |
7945 | ||
dee4682a JM |
7946 | procedure Set_Fixed_Prim (Pos : Nat); |
7947 | -- Sets to true an element of the Fixed_Prim table to indicate | |
7948 | -- that this entry of the dispatch table of Typ is occupied. | |
70482933 | 7949 | |
d0dd5209 JM |
7950 | ------------------------------------------ |
7951 | -- Handle_Inherited_Private_Subprograms -- | |
7952 | ------------------------------------------ | |
7953 | ||
7954 | procedure Handle_Inherited_Private_Subprograms (Typ : Entity_Id) is | |
7955 | Op_List : Elist_Id; | |
7956 | Op_Elmt : Elmt_Id; | |
7957 | Op_Elmt_2 : Elmt_Id; | |
7958 | Prim_Op : Entity_Id; | |
7959 | Parent_Subp : Entity_Id; | |
7960 | ||
7961 | begin | |
7962 | Op_List := Primitive_Operations (Typ); | |
7963 | ||
7964 | Op_Elmt := First_Elmt (Op_List); | |
7965 | while Present (Op_Elmt) loop | |
7966 | Prim_Op := Node (Op_Elmt); | |
7967 | ||
7968 | -- Search primitives that are implicit operations with an | |
7969 | -- internal name whose parent operation has a normal name. | |
7970 | ||
7971 | if Present (Alias (Prim_Op)) | |
7972 | and then Find_Dispatching_Type (Alias (Prim_Op)) /= Typ | |
7973 | and then not Comes_From_Source (Prim_Op) | |
7974 | and then Is_Internal_Name (Chars (Prim_Op)) | |
7975 | and then not Is_Internal_Name (Chars (Alias (Prim_Op))) | |
7976 | then | |
7977 | Parent_Subp := Alias (Prim_Op); | |
7978 | ||
7979 | -- Check if the type has an explicit overriding for this | |
7980 | -- primitive. | |
7981 | ||
7982 | Op_Elmt_2 := Next_Elmt (Op_Elmt); | |
7983 | while Present (Op_Elmt_2) loop | |
7984 | if Chars (Node (Op_Elmt_2)) = Chars (Parent_Subp) | |
7985 | and then Type_Conformant (Prim_Op, Node (Op_Elmt_2)) | |
7986 | then | |
024d33d8 JM |
7987 | Set_DT_Position_Value (Prim_Op, |
7988 | DT_Position (Parent_Subp)); | |
7989 | Set_DT_Position_Value (Node (Op_Elmt_2), | |
d0dd5209 JM |
7990 | DT_Position (Parent_Subp)); |
7991 | Set_Fixed_Prim (UI_To_Int (DT_Position (Prim_Op))); | |
7992 | ||
7993 | goto Next_Primitive; | |
7994 | end if; | |
7995 | ||
7996 | Next_Elmt (Op_Elmt_2); | |
7997 | end loop; | |
7998 | end if; | |
7999 | ||
8000 | <<Next_Primitive>> | |
8001 | Next_Elmt (Op_Elmt); | |
8002 | end loop; | |
8003 | end Handle_Inherited_Private_Subprograms; | |
8004 | ||
dee4682a JM |
8005 | -------------------- |
8006 | -- Set_Fixed_Prim -- | |
8007 | -------------------- | |
70482933 | 8008 | |
dee4682a | 8009 | procedure Set_Fixed_Prim (Pos : Nat) is |
70482933 | 8010 | begin |
5f143024 | 8011 | pragma Assert (Pos <= Count_Prim); |
dee4682a JM |
8012 | Fixed_Prim (Pos) := True; |
8013 | exception | |
8014 | when Constraint_Error => | |
8015 | raise Program_Error; | |
8016 | end Set_Fixed_Prim; | |
70482933 | 8017 | |
dee4682a | 8018 | begin |
d0dd5209 JM |
8019 | -- In case of nested packages and public child package it may be |
8020 | -- necessary a special management on inherited subprograms so that | |
8021 | -- the dispatch table is properly filled. | |
8022 | ||
8023 | if Ekind (Scope (Scope (Typ))) = E_Package | |
8024 | and then Scope (Scope (Typ)) /= Standard_Standard | |
8025 | and then ((Is_Derived_Type (Typ) and then not Is_Private_Type (Typ)) | |
8026 | or else | |
8027 | (Nkind (Parent (Typ)) = N_Private_Extension_Declaration | |
8028 | and then Is_Generic_Type (Typ))) | |
8029 | and then In_Open_Scopes (Scope (Etype (Typ))) | |
d347f572 | 8030 | and then Is_Base_Type (Typ) |
d0dd5209 JM |
8031 | then |
8032 | Handle_Inherited_Private_Subprograms (Typ); | |
8033 | end if; | |
8034 | ||
dee4682a | 8035 | -- Second stage: Register fixed entries |
70482933 | 8036 | |
dee4682a JM |
8037 | Nb_Prim := 0; |
8038 | Prim_Elmt := First_Prim; | |
8039 | while Present (Prim_Elmt) loop | |
8040 | Prim := Node (Prim_Elmt); | |
70482933 | 8041 | |
dee4682a JM |
8042 | -- Predefined primitives have a separate table and all its |
8043 | -- entries are at predefined fixed positions. | |
70482933 | 8044 | |
44a10091 AC |
8045 | if In_Predef_Prims_DT (Prim) then |
8046 | if Is_Predefined_Dispatching_Operation (Prim) then | |
024d33d8 JM |
8047 | Set_DT_Position_Value (Prim, |
8048 | Default_Prim_Op_Position (Prim)); | |
70482933 | 8049 | |
44a10091 | 8050 | else pragma Assert (Present (Alias (Prim))); |
024d33d8 | 8051 | Set_DT_Position_Value (Prim, |
44a10091 AC |
8052 | Default_Prim_Op_Position (Ultimate_Alias (Prim))); |
8053 | end if; | |
10b93b2e | 8054 | |
dee4682a | 8055 | -- Overriding primitives of ancestor abstract interfaces |
70482933 | 8056 | |
ce2b6ba5 JM |
8057 | elsif Present (Interface_Alias (Prim)) |
8058 | and then Is_Ancestor | |
4ac2477e JM |
8059 | (Find_Dispatching_Type (Interface_Alias (Prim)), Typ, |
8060 | Use_Full_View => True) | |
dee4682a JM |
8061 | then |
8062 | pragma Assert (DT_Position (Prim) = No_Uint | |
ce2b6ba5 | 8063 | and then Present (DTC_Entity (Interface_Alias (Prim)))); |
70482933 | 8064 | |
ce2b6ba5 | 8065 | E := Interface_Alias (Prim); |
024d33d8 | 8066 | Set_DT_Position_Value (Prim, DT_Position (E)); |
758c442c | 8067 | |
dee4682a JM |
8068 | pragma Assert |
8069 | (DT_Position (Alias (Prim)) = No_Uint | |
8070 | or else DT_Position (Alias (Prim)) = DT_Position (E)); | |
024d33d8 | 8071 | Set_DT_Position_Value (Alias (Prim), DT_Position (E)); |
dee4682a | 8072 | Set_Fixed_Prim (UI_To_Int (DT_Position (Prim))); |
bfef8d0d | 8073 | |
74a78a4f AC |
8074 | -- Overriding primitives must use the same entry as the overridden |
8075 | -- primitive. Note that the Alias of the operation is set when the | |
8076 | -- operation is declared by a renaming, in which case it is not | |
8077 | -- overriding. If it renames another primitive it will use the | |
8078 | -- same dispatch table slot, but if it renames an operation in a | |
8079 | -- nested package it's a new primitive and will have its own slot. | |
bfef8d0d | 8080 | |
ce2b6ba5 | 8081 | elsif not Present (Interface_Alias (Prim)) |
dee4682a | 8082 | and then Present (Alias (Prim)) |
b2e1beb3 | 8083 | and then Chars (Prim) = Chars (Alias (Prim)) |
74a78a4f AC |
8084 | and then Nkind (Unit_Declaration_Node (Prim)) /= |
8085 | N_Subprogram_Renaming_Declaration | |
bfef8d0d | 8086 | then |
74a78a4f AC |
8087 | declare |
8088 | Par_Type : constant Entity_Id := | |
cc3a2986 AC |
8089 | Find_Dispatching_Type (Alias (Prim)); |
8090 | ||
74a78a4f AC |
8091 | begin |
8092 | if Present (Par_Type) | |
8093 | and then Par_Type /= Typ | |
8094 | and then Is_Ancestor (Par_Type, Typ, Use_Full_View => True) | |
8095 | and then Present (DTC_Entity (Alias (Prim))) | |
8096 | then | |
8097 | E := Alias (Prim); | |
8098 | Set_DT_Position_Value (Prim, DT_Position (E)); | |
758c442c | 8099 | |
74a78a4f AC |
8100 | if not Is_Predefined_Dispatching_Alias (E) then |
8101 | Set_Fixed_Prim (UI_To_Int (DT_Position (E))); | |
8102 | end if; | |
8103 | end if; | |
8104 | end; | |
fbf5a39b | 8105 | end if; |
70482933 | 8106 | |
758c442c GD |
8107 | Next_Elmt (Prim_Elmt); |
8108 | end loop; | |
8109 | ||
6782b1ef AC |
8110 | -- Third stage: Fix the position of all the new primitives. Entries |
8111 | -- associated with primitives covering interfaces are handled in a | |
8112 | -- latter round. | |
758c442c | 8113 | |
dee4682a JM |
8114 | Prim_Elmt := First_Prim; |
8115 | while Present (Prim_Elmt) loop | |
8116 | Prim := Node (Prim_Elmt); | |
758c442c | 8117 | |
dee4682a | 8118 | -- Skip primitives previously set entries |
758c442c | 8119 | |
dee4682a JM |
8120 | if DT_Position (Prim) /= No_Uint then |
8121 | null; | |
758c442c | 8122 | |
dee4682a | 8123 | -- Primitives covering interface primitives are handled later |
758c442c | 8124 | |
ce2b6ba5 | 8125 | elsif Present (Interface_Alias (Prim)) then |
dee4682a | 8126 | null; |
758c442c | 8127 | |
dee4682a JM |
8128 | else |
8129 | -- Take the next available position in the DT | |
758c442c | 8130 | |
dee4682a JM |
8131 | loop |
8132 | Nb_Prim := Nb_Prim + 1; | |
8133 | pragma Assert (Nb_Prim <= Count_Prim); | |
8134 | exit when not Fixed_Prim (Nb_Prim); | |
8135 | end loop; | |
758c442c | 8136 | |
024d33d8 | 8137 | Set_DT_Position_Value (Prim, UI_From_Int (Nb_Prim)); |
dee4682a JM |
8138 | Set_Fixed_Prim (Nb_Prim); |
8139 | end if; | |
758c442c | 8140 | |
dee4682a JM |
8141 | Next_Elmt (Prim_Elmt); |
8142 | end loop; | |
8143 | end; | |
758c442c | 8144 | |
dee4682a | 8145 | -- Fourth stage: Complete the decoration of primitives covering |
6782b1ef AC |
8146 | -- interfaces (that is, propagate the DT_Position attribute from |
8147 | -- the aliased primitive) | |
758c442c | 8148 | |
dee4682a JM |
8149 | Prim_Elmt := First_Prim; |
8150 | while Present (Prim_Elmt) loop | |
8151 | Prim := Node (Prim_Elmt); | |
758c442c | 8152 | |
dee4682a | 8153 | if DT_Position (Prim) = No_Uint |
ce2b6ba5 | 8154 | and then Present (Interface_Alias (Prim)) |
dee4682a JM |
8155 | then |
8156 | pragma Assert (Present (Alias (Prim)) | |
8157 | and then Find_Dispatching_Type (Alias (Prim)) = Typ); | |
758c442c | 8158 | |
dee4682a | 8159 | -- Check if this entry will be placed in the primary DT |
758c442c | 8160 | |
ce2b6ba5 | 8161 | if Is_Ancestor |
4ac2477e JM |
8162 | (Find_Dispatching_Type (Interface_Alias (Prim)), Typ, |
8163 | Use_Full_View => True) | |
70482933 | 8164 | then |
dee4682a | 8165 | pragma Assert (DT_Position (Alias (Prim)) /= No_Uint); |
024d33d8 | 8166 | Set_DT_Position_Value (Prim, DT_Position (Alias (Prim))); |
758c442c | 8167 | |
dee4682a | 8168 | -- Otherwise it will be placed in the secondary DT |
758c442c | 8169 | |
dee4682a JM |
8170 | else |
8171 | pragma Assert | |
ce2b6ba5 | 8172 | (DT_Position (Interface_Alias (Prim)) /= No_Uint); |
024d33d8 | 8173 | Set_DT_Position_Value (Prim, |
ce2b6ba5 | 8174 | DT_Position (Interface_Alias (Prim))); |
758c442c | 8175 | end if; |
dee4682a | 8176 | end if; |
758c442c | 8177 | |
dee4682a JM |
8178 | Next_Elmt (Prim_Elmt); |
8179 | end loop; | |
10b93b2e | 8180 | |
6782b1ef AC |
8181 | -- Generate listing showing the contents of the dispatch tables. This |
8182 | -- action is done before some further static checks because in case of | |
8183 | -- critical errors caused by a wrong dispatch table we need to see the | |
8184 | -- contents of such table. | |
10b93b2e | 8185 | |
dee4682a JM |
8186 | if Debug_Flag_ZZ then |
8187 | Write_DT (Typ); | |
8188 | end if; | |
758c442c | 8189 | |
dee4682a JM |
8190 | -- Final stage: Ensure that the table is correct plus some further |
8191 | -- verifications concerning the primitives. | |
758c442c | 8192 | |
dee4682a JM |
8193 | Prim_Elmt := First_Prim; |
8194 | DT_Length := 0; | |
8195 | while Present (Prim_Elmt) loop | |
8196 | Prim := Node (Prim_Elmt); | |
758c442c | 8197 | |
6782b1ef AC |
8198 | -- At this point all the primitives MUST have a position in the |
8199 | -- dispatch table. | |
758c442c | 8200 | |
dee4682a JM |
8201 | if DT_Position (Prim) = No_Uint then |
8202 | raise Program_Error; | |
8203 | end if; | |
758c442c | 8204 | |
dee4682a | 8205 | -- Calculate real size of the dispatch table |
758c442c | 8206 | |
44a10091 | 8207 | if not In_Predef_Prims_DT (Prim) |
dee4682a JM |
8208 | and then UI_To_Int (DT_Position (Prim)) > DT_Length |
8209 | then | |
8210 | DT_Length := UI_To_Int (DT_Position (Prim)); | |
8211 | end if; | |
758c442c | 8212 | |
6782b1ef AC |
8213 | -- Ensure that the assigned position to non-predefined dispatching |
8214 | -- operations in the dispatch table is correct. | |
758c442c | 8215 | |
44a10091 AC |
8216 | if not Is_Predefined_Dispatching_Operation (Prim) |
8217 | and then not Is_Predefined_Dispatching_Alias (Prim) | |
dee4682a JM |
8218 | then |
8219 | Validate_Position (Prim); | |
8220 | end if; | |
70482933 | 8221 | |
dee4682a JM |
8222 | if Chars (Prim) = Name_Finalize then |
8223 | Finalized := True; | |
8224 | end if; | |
70482933 | 8225 | |
dee4682a JM |
8226 | if Chars (Prim) = Name_Adjust then |
8227 | Adjusted := True; | |
8228 | end if; | |
bfef8d0d | 8229 | |
ed2233dc AC |
8230 | -- An abstract operation cannot be declared in the private part for a |
8231 | -- visible abstract type, because it can't be overridden outside this | |
8232 | -- package hierarchy. For explicit declarations this is checked at | |
8233 | -- the point of declaration, but for inherited operations it must be | |
8234 | -- done when building the dispatch table. | |
dee4682a | 8235 | |
ce2b6ba5 JM |
8236 | -- Ada 2005 (AI-251): Primitives associated with interfaces are |
8237 | -- excluded from this check because interfaces must be visible in | |
8238 | -- the public and private part (RM 7.3 (7.3/2)) | |
dee4682a | 8239 | |
6782b1ef AC |
8240 | -- We disable this check in Relaxed_RM_Semantics mode, to accommodate |
8241 | -- legacy Ada code. | |
f0709ca6 | 8242 | |
303fbb20 | 8243 | if not Relaxed_RM_Semantics |
f0709ca6 | 8244 | and then Is_Abstract_Type (Typ) |
dee4682a JM |
8245 | and then Is_Abstract_Subprogram (Prim) |
8246 | and then Present (Alias (Prim)) | |
ce2b6ba5 JM |
8247 | and then not Is_Interface |
8248 | (Find_Dispatching_Type (Ultimate_Alias (Prim))) | |
8249 | and then not Present (Interface_Alias (Prim)) | |
dee4682a JM |
8250 | and then Is_Derived_Type (Typ) |
8251 | and then In_Private_Part (Current_Scope) | |
8252 | and then | |
8253 | List_Containing (Parent (Prim)) = | |
d12b19fa | 8254 | Private_Declarations (Package_Specification (Current_Scope)) |
dee4682a JM |
8255 | and then Original_View_In_Visible_Part (Typ) |
8256 | then | |
8257 | -- We exclude Input and Output stream operations because | |
6782b1ef AC |
8258 | -- Limited_Controlled inherits useless Input and Output stream |
8259 | -- operations from Root_Controlled, which can never be overridden. | |
2d6f6e08 | 8260 | -- Move this check to sem??? |
70482933 | 8261 | |
dee4682a JM |
8262 | if not Is_TSS (Prim, TSS_Stream_Input) |
8263 | and then | |
8264 | not Is_TSS (Prim, TSS_Stream_Output) | |
70482933 | 8265 | then |
ed2233dc | 8266 | Error_Msg_NE |
dee4682a | 8267 | ("abstract inherited private operation&" & |
b2e1beb3 | 8268 | " must be overridden (RM 3.9.3(10))", |
dee4682a | 8269 | Parent (Typ), Prim); |
70482933 | 8270 | end if; |
dee4682a | 8271 | end if; |
758c442c | 8272 | |
dee4682a JM |
8273 | Next_Elmt (Prim_Elmt); |
8274 | end loop; | |
70482933 | 8275 | |
dee4682a | 8276 | -- Additional check |
758c442c | 8277 | |
dee4682a JM |
8278 | if Is_Controlled (Typ) then |
8279 | if not Finalized then | |
ed2233dc | 8280 | Error_Msg_N |
685bc70f | 8281 | ("controlled type has no explicit Finalize method??", Typ); |
70482933 | 8282 | |
dee4682a | 8283 | elsif not Adjusted then |
ed2233dc | 8284 | Error_Msg_N |
685bc70f | 8285 | ("controlled type has no explicit Adjust method??", Typ); |
70482933 | 8286 | end if; |
dee4682a | 8287 | end if; |
70482933 | 8288 | |
dee4682a | 8289 | -- Set the final size of the Dispatch Table |
758c442c | 8290 | |
dee4682a | 8291 | Set_DT_Entry_Count (The_Tag, UI_From_Int (DT_Length)); |
70482933 | 8292 | |
d0dd5209 | 8293 | -- The derived type must have at least as many components as its parent |
1923d2d6 | 8294 | -- (for root types Etype points to itself and the test cannot fail). |
758c442c | 8295 | |
d0dd5209 JM |
8296 | if DT_Entry_Count (The_Tag) < |
8297 | DT_Entry_Count (First_Tag_Component (Parent_Typ)) | |
8298 | then | |
8299 | raise Program_Error; | |
758c442c | 8300 | end if; |
70482933 RK |
8301 | end Set_All_DT_Position; |
8302 | ||
236fecbf JM |
8303 | -------------------------- |
8304 | -- Set_CPP_Constructors -- | |
8305 | -------------------------- | |
70482933 | 8306 | |
236fecbf | 8307 | procedure Set_CPP_Constructors (Typ : Entity_Id) is |
cefce34c | 8308 | |
f62b296e AC |
8309 | function Gen_Parameters_Profile (E : Entity_Id) return List_Id; |
8310 | -- Duplicate the parameters profile of the imported C++ constructor | |
3a09e026 EB |
8311 | -- adding the "this" pointer to the object as the additional first |
8312 | -- parameter under the usual form _Init : in out Typ. | |
cefce34c | 8313 | |
6782b1ef AC |
8314 | ---------------------------- |
8315 | -- Gen_Parameters_Profile -- | |
8316 | ---------------------------- | |
8317 | ||
f62b296e AC |
8318 | function Gen_Parameters_Profile (E : Entity_Id) return List_Id is |
8319 | Loc : constant Source_Ptr := Sloc (E); | |
8320 | Parms : List_Id; | |
8321 | P : Node_Id; | |
71fb4dc8 | 8322 | |
cefce34c | 8323 | begin |
f62b296e AC |
8324 | Parms := |
8325 | New_List ( | |
8326 | Make_Parameter_Specification (Loc, | |
8327 | Defining_Identifier => | |
8328 | Make_Defining_Identifier (Loc, Name_uInit), | |
3a09e026 EB |
8329 | In_Present => True, |
8330 | Out_Present => True, | |
e4494292 | 8331 | Parameter_Type => New_Occurrence_Of (Typ, Loc))); |
f62b296e AC |
8332 | |
8333 | if Present (Parameter_Specifications (Parent (E))) then | |
8334 | P := First (Parameter_Specifications (Parent (E))); | |
8335 | while Present (P) loop | |
8336 | Append_To (Parms, | |
8337 | Make_Parameter_Specification (Loc, | |
8338 | Defining_Identifier => | |
8339 | Make_Defining_Identifier (Loc, | |
8340 | Chars => Chars (Defining_Identifier (P))), | |
8341 | Parameter_Type => New_Copy_Tree (Parameter_Type (P)), | |
8342 | Expression => New_Copy_Tree (Expression (P)))); | |
8343 | Next (P); | |
8344 | end loop; | |
cefce34c | 8345 | end if; |
71fb4dc8 | 8346 | |
f62b296e AC |
8347 | return Parms; |
8348 | end Gen_Parameters_Profile; | |
cefce34c JM |
8349 | |
8350 | -- Local variables | |
8351 | ||
f62b296e AC |
8352 | Loc : Source_Ptr; |
8353 | E : Entity_Id; | |
8354 | Found : Boolean := False; | |
8355 | IP : Entity_Id; | |
8356 | IP_Body : Node_Id; | |
8357 | P : Node_Id; | |
8358 | Parms : List_Id; | |
cefce34c | 8359 | |
73534138 AC |
8360 | Covers_Default_Constructor : Entity_Id := Empty; |
8361 | ||
8362 | -- Start of processing for Set_CPP_Constructor | |
8363 | ||
70482933 | 8364 | begin |
cefce34c JM |
8365 | pragma Assert (Is_CPP_Class (Typ)); |
8366 | ||
236fecbf | 8367 | -- Look for the constructor entities |
70482933 RK |
8368 | |
8369 | E := Next_Entity (Typ); | |
236fecbf JM |
8370 | while Present (E) loop |
8371 | if Ekind (E) = E_Function | |
8372 | and then Is_Constructor (E) | |
8373 | then | |
236fecbf JM |
8374 | Found := True; |
8375 | Loc := Sloc (E); | |
f62b296e | 8376 | Parms := Gen_Parameters_Profile (E); |
3a09e026 | 8377 | IP := Make_Defining_Identifier (Loc, Make_Init_Proc_Name (Typ)); |
f62b296e | 8378 | |
1fb63e89 | 8379 | -- Case 1: Constructor of untagged type |
f62b296e AC |
8380 | |
8381 | -- If the C++ class has no virtual methods then the matching Ada | |
1fb63e89 | 8382 | -- type is an untagged record type. In such case there is no need |
f62b296e AC |
8383 | -- to generate a wrapper of the C++ constructor because the _tag |
8384 | -- component is not available. | |
8385 | ||
8386 | if not Is_Tagged_Type (Typ) then | |
8387 | Discard_Node | |
8388 | (Make_Subprogram_Declaration (Loc, | |
8389 | Specification => | |
8390 | Make_Procedure_Specification (Loc, | |
8391 | Defining_Unit_Name => IP, | |
8392 | Parameter_Specifications => Parms))); | |
8393 | ||
8394 | Set_Init_Proc (Typ, IP); | |
8395 | Set_Is_Imported (IP); | |
8396 | Set_Is_Constructor (IP); | |
8397 | Set_Interface_Name (IP, Interface_Name (E)); | |
8398 | Set_Convention (IP, Convention_CPP); | |
8399 | Set_Is_Public (IP); | |
8400 | Set_Has_Completion (IP); | |
8401 | ||
8402 | -- Case 2: Constructor of a tagged type | |
8403 | ||
3a09e026 EB |
8404 | -- In this case we generate the IP routine as a wrapper of the |
8405 | -- C++ constructor because IP must also save a copy of the _tag | |
f62b296e AC |
8406 | -- generated in the C++ side. The copy of the _tag is used by |
8407 | -- Build_CPP_Init_Procedure to elaborate derivations of C++ types. | |
cefce34c | 8408 | |
f62b296e | 8409 | -- Generate: |
3a09e026 EB |
8410 | -- procedure IP (_init : in out Typ; ...) is |
8411 | -- procedure ConstructorP (_init : in out Typ; ...); | |
f62b296e AC |
8412 | -- pragma Import (ConstructorP); |
8413 | -- begin | |
8414 | -- ConstructorP (_init, ...); | |
8415 | -- if Typ._tag = null then | |
8416 | -- Typ._tag := _init._tag; | |
8417 | -- end if; | |
8418 | -- end IP; | |
cefce34c | 8419 | |
f62b296e AC |
8420 | else |
8421 | declare | |
8422 | Body_Stmts : constant List_Id := New_List; | |
8423 | Constructor_Id : Entity_Id; | |
8424 | Constructor_Decl_Node : Node_Id; | |
8425 | Init_Tags_List : List_Id; | |
cefce34c | 8426 | |
f62b296e AC |
8427 | begin |
8428 | Constructor_Id := Make_Temporary (Loc, 'P'); | |
cefce34c | 8429 | |
f62b296e AC |
8430 | Constructor_Decl_Node := |
8431 | Make_Subprogram_Declaration (Loc, | |
8432 | Make_Procedure_Specification (Loc, | |
8433 | Defining_Unit_Name => Constructor_Id, | |
8434 | Parameter_Specifications => Parms)); | |
cefce34c | 8435 | |
f62b296e AC |
8436 | Set_Is_Imported (Constructor_Id); |
8437 | Set_Is_Constructor (Constructor_Id); | |
8438 | Set_Interface_Name (Constructor_Id, Interface_Name (E)); | |
8439 | Set_Convention (Constructor_Id, Convention_CPP); | |
8440 | Set_Is_Public (Constructor_Id); | |
8441 | Set_Has_Completion (Constructor_Id); | |
cefce34c | 8442 | |
f62b296e | 8443 | -- Build the init procedure as a wrapper of this constructor |
cefce34c | 8444 | |
f62b296e | 8445 | Parms := Gen_Parameters_Profile (E); |
cefce34c | 8446 | |
f62b296e | 8447 | -- Invoke the C++ constructor |
cefce34c | 8448 | |
f62b296e AC |
8449 | declare |
8450 | Actuals : constant List_Id := New_List; | |
cefce34c | 8451 | |
f62b296e AC |
8452 | begin |
8453 | P := First (Parms); | |
8454 | while Present (P) loop | |
8455 | Append_To (Actuals, | |
e4494292 | 8456 | New_Occurrence_Of (Defining_Identifier (P), Loc)); |
f62b296e AC |
8457 | Next (P); |
8458 | end loop; | |
cefce34c | 8459 | |
f62b296e AC |
8460 | Append_To (Body_Stmts, |
8461 | Make_Procedure_Call_Statement (Loc, | |
e4494292 | 8462 | Name => New_Occurrence_Of (Constructor_Id, Loc), |
f62b296e AC |
8463 | Parameter_Associations => Actuals)); |
8464 | end; | |
cefce34c | 8465 | |
f62b296e | 8466 | -- Initialize copies of C++ primary and secondary tags |
cefce34c | 8467 | |
f62b296e | 8468 | Init_Tags_List := New_List; |
cefce34c | 8469 | |
f62b296e AC |
8470 | declare |
8471 | Tag_Elmt : Elmt_Id; | |
8472 | Tag_Comp : Node_Id; | |
cefce34c | 8473 | |
f62b296e AC |
8474 | begin |
8475 | Tag_Elmt := First_Elmt (Access_Disp_Table (Typ)); | |
8476 | Tag_Comp := First_Tag_Component (Typ); | |
cefce34c | 8477 | |
f62b296e AC |
8478 | while Present (Tag_Elmt) |
8479 | and then Is_Tag (Node (Tag_Elmt)) | |
8480 | loop | |
8481 | -- Skip the following assertion with primary tags | |
8482 | -- because Related_Type is not set on primary tag | |
3a09e026 | 8483 | -- components. |
f62b296e AC |
8484 | |
8485 | pragma Assert | |
8486 | (Tag_Comp = First_Tag_Component (Typ) | |
8487 | or else Related_Type (Node (Tag_Elmt)) | |
8488 | = Related_Type (Tag_Comp)); | |
8489 | ||
8490 | Append_To (Init_Tags_List, | |
8491 | Make_Assignment_Statement (Loc, | |
8492 | Name => | |
e4494292 | 8493 | New_Occurrence_Of (Node (Tag_Elmt), Loc), |
f62b296e AC |
8494 | Expression => |
8495 | Make_Selected_Component (Loc, | |
8496 | Prefix => | |
8497 | Make_Identifier (Loc, Name_uInit), | |
8498 | Selector_Name => | |
e4494292 | 8499 | New_Occurrence_Of (Tag_Comp, Loc)))); |
cefce34c | 8500 | |
f62b296e AC |
8501 | Tag_Comp := Next_Tag_Component (Tag_Comp); |
8502 | Next_Elmt (Tag_Elmt); | |
8503 | end loop; | |
8504 | end; | |
cefce34c | 8505 | |
f62b296e AC |
8506 | Append_To (Body_Stmts, |
8507 | Make_If_Statement (Loc, | |
8508 | Condition => | |
8509 | Make_Op_Eq (Loc, | |
8510 | Left_Opnd => | |
e4494292 | 8511 | New_Occurrence_Of |
f62b296e AC |
8512 | (Node (First_Elmt (Access_Disp_Table (Typ))), |
8513 | Loc), | |
8514 | Right_Opnd => | |
8515 | Unchecked_Convert_To (RTE (RE_Tag), | |
e4494292 | 8516 | New_Occurrence_Of (RTE (RE_Null_Address), Loc))), |
f62b296e AC |
8517 | Then_Statements => Init_Tags_List)); |
8518 | ||
8519 | IP_Body := | |
8520 | Make_Subprogram_Body (Loc, | |
8521 | Specification => | |
8522 | Make_Procedure_Specification (Loc, | |
8523 | Defining_Unit_Name => IP, | |
8524 | Parameter_Specifications => Parms), | |
8525 | Declarations => New_List (Constructor_Decl_Node), | |
8526 | Handled_Statement_Sequence => | |
8527 | Make_Handled_Sequence_Of_Statements (Loc, | |
8528 | Statements => Body_Stmts, | |
8529 | Exception_Handlers => No_List)); | |
8530 | ||
8531 | Discard_Node (IP_Body); | |
8532 | Set_Init_Proc (Typ, IP); | |
8533 | end; | |
8534 | end if; | |
73534138 | 8535 | |
6782b1ef AC |
8536 | -- If this constructor has parameters and all its parameters have |
8537 | -- defaults then it covers the default constructor. The semantic | |
8538 | -- analyzer ensures that only one constructor with defaults covers | |
8539 | -- the default constructor. | |
73534138 AC |
8540 | |
8541 | if Present (Parameter_Specifications (Parent (E))) | |
8542 | and then Needs_No_Actuals (E) | |
8543 | then | |
f62b296e | 8544 | Covers_Default_Constructor := IP; |
73534138 | 8545 | end if; |
236fecbf JM |
8546 | end if; |
8547 | ||
70482933 RK |
8548 | Next_Entity (E); |
8549 | end loop; | |
8550 | ||
fbf5a39b | 8551 | -- If there are no constructors, mark the type as abstract since we |
70482933 RK |
8552 | -- won't be able to declare objects of that type. |
8553 | ||
236fecbf | 8554 | if not Found then |
dee4682a | 8555 | Set_Is_Abstract_Type (Typ); |
70482933 | 8556 | end if; |
cefce34c | 8557 | |
73534138 AC |
8558 | -- Handle constructor that has all its parameters with defaults and |
8559 | -- hence it covers the default constructor. We generate a wrapper IP | |
8560 | -- which calls the covering constructor. | |
8561 | ||
8562 | if Present (Covers_Default_Constructor) then | |
f62b296e AC |
8563 | declare |
8564 | Body_Stmts : List_Id; | |
73534138 | 8565 | |
f62b296e AC |
8566 | begin |
8567 | Loc := Sloc (Covers_Default_Constructor); | |
73534138 | 8568 | |
f62b296e AC |
8569 | Body_Stmts := New_List ( |
8570 | Make_Procedure_Call_Statement (Loc, | |
8571 | Name => | |
e4494292 | 8572 | New_Occurrence_Of (Covers_Default_Constructor, Loc), |
f62b296e AC |
8573 | Parameter_Associations => New_List ( |
8574 | Make_Identifier (Loc, Name_uInit)))); | |
73534138 | 8575 | |
f62b296e | 8576 | IP := Make_Defining_Identifier (Loc, Make_Init_Proc_Name (Typ)); |
73534138 | 8577 | |
f62b296e AC |
8578 | IP_Body := |
8579 | Make_Subprogram_Body (Loc, | |
8580 | Specification => | |
8581 | Make_Procedure_Specification (Loc, | |
8582 | Defining_Unit_Name => IP, | |
8583 | Parameter_Specifications => New_List ( | |
8584 | Make_Parameter_Specification (Loc, | |
8585 | Defining_Identifier => | |
8586 | Make_Defining_Identifier (Loc, Name_uInit), | |
e4494292 | 8587 | Parameter_Type => New_Occurrence_Of (Typ, Loc)))), |
73534138 | 8588 | |
f62b296e AC |
8589 | Declarations => No_List, |
8590 | ||
8591 | Handled_Statement_Sequence => | |
8592 | Make_Handled_Sequence_Of_Statements (Loc, | |
8593 | Statements => Body_Stmts, | |
8594 | Exception_Handlers => No_List)); | |
8595 | ||
8596 | Discard_Node (IP_Body); | |
8597 | Set_Init_Proc (Typ, IP); | |
8598 | end; | |
73534138 AC |
8599 | end if; |
8600 | ||
cefce34c JM |
8601 | -- If the CPP type has constructors then it must import also the default |
8602 | -- C++ constructor. It is required for default initialization of objects | |
8603 | -- of the type. It is also required to elaborate objects of Ada types | |
8604 | -- that are defined as derivations of this CPP type. | |
8605 | ||
8606 | if Has_CPP_Constructors (Typ) | |
8607 | and then No (Init_Proc (Typ)) | |
8608 | then | |
685bc70f | 8609 | Error_Msg_N ("??default constructor must be imported from C++", Typ); |
cefce34c | 8610 | end if; |
236fecbf | 8611 | end Set_CPP_Constructors; |
70482933 | 8612 | |
024d33d8 JM |
8613 | --------------------------- |
8614 | -- Set_DT_Position_Value -- | |
8615 | --------------------------- | |
8616 | ||
8617 | procedure Set_DT_Position_Value (Prim : Entity_Id; Value : Uint) is | |
8618 | begin | |
8619 | Set_DT_Position (Prim, Value); | |
8620 | ||
8621 | -- Propagate the value to the wrapped subprogram (if one is present) | |
8622 | ||
4a08c95c | 8623 | if Ekind (Prim) in E_Function | E_Procedure |
024d33d8 JM |
8624 | and then Is_Primitive_Wrapper (Prim) |
8625 | and then Present (Wrapped_Entity (Prim)) | |
8626 | and then Is_Dispatching_Operation (Wrapped_Entity (Prim)) | |
8627 | then | |
8628 | Set_DT_Position (Wrapped_Entity (Prim), Value); | |
8629 | end if; | |
8630 | end Set_DT_Position_Value; | |
8631 | ||
d0dd5209 JM |
8632 | -------------------------- |
8633 | -- Set_DTC_Entity_Value -- | |
8634 | -------------------------- | |
8635 | ||
8636 | procedure Set_DTC_Entity_Value | |
8637 | (Tagged_Type : Entity_Id; | |
8638 | Prim : Entity_Id) | |
8639 | is | |
8640 | begin | |
ce2b6ba5 | 8641 | if Present (Interface_Alias (Prim)) |
d0dd5209 | 8642 | and then Is_Interface |
ce2b6ba5 | 8643 | (Find_Dispatching_Type (Interface_Alias (Prim))) |
d0dd5209 JM |
8644 | then |
8645 | Set_DTC_Entity (Prim, | |
8646 | Find_Interface_Tag | |
8647 | (T => Tagged_Type, | |
ce2b6ba5 | 8648 | Iface => Find_Dispatching_Type (Interface_Alias (Prim)))); |
d0dd5209 JM |
8649 | else |
8650 | Set_DTC_Entity (Prim, | |
8651 | First_Tag_Component (Tagged_Type)); | |
8652 | end if; | |
024d33d8 JM |
8653 | |
8654 | -- Propagate the value to the wrapped subprogram (if one is present) | |
8655 | ||
4a08c95c | 8656 | if Ekind (Prim) in E_Function | E_Procedure |
024d33d8 JM |
8657 | and then Is_Primitive_Wrapper (Prim) |
8658 | and then Present (Wrapped_Entity (Prim)) | |
8659 | and then Is_Dispatching_Operation (Wrapped_Entity (Prim)) | |
8660 | then | |
8661 | Set_DTC_Entity (Wrapped_Entity (Prim), DTC_Entity (Prim)); | |
8662 | end if; | |
d0dd5209 JM |
8663 | end Set_DTC_Entity_Value; |
8664 | ||
4d744221 JM |
8665 | ----------------- |
8666 | -- Tagged_Kind -- | |
8667 | ----------------- | |
8668 | ||
8669 | function Tagged_Kind (T : Entity_Id) return Node_Id is | |
8670 | Conc_Typ : Entity_Id; | |
8671 | Loc : constant Source_Ptr := Sloc (T); | |
8672 | ||
8673 | begin | |
b0efe69e JM |
8674 | pragma Assert |
8675 | (Is_Tagged_Type (T) and then RTE_Available (RE_Tagged_Kind)); | |
4d744221 JM |
8676 | |
8677 | -- Abstract kinds | |
8678 | ||
dee4682a | 8679 | if Is_Abstract_Type (T) then |
4d744221 | 8680 | if Is_Limited_Record (T) then |
e4494292 RD |
8681 | return New_Occurrence_Of |
8682 | (RTE (RE_TK_Abstract_Limited_Tagged), Loc); | |
4d744221 | 8683 | else |
e4494292 RD |
8684 | return New_Occurrence_Of |
8685 | (RTE (RE_TK_Abstract_Tagged), Loc); | |
4d744221 JM |
8686 | end if; |
8687 | ||
8688 | -- Concurrent kinds | |
8689 | ||
8690 | elsif Is_Concurrent_Record_Type (T) then | |
8691 | Conc_Typ := Corresponding_Concurrent_Type (T); | |
8692 | ||
b2e1beb3 ES |
8693 | if Present (Full_View (Conc_Typ)) then |
8694 | Conc_Typ := Full_View (Conc_Typ); | |
8695 | end if; | |
8696 | ||
4d744221 | 8697 | if Ekind (Conc_Typ) = E_Protected_Type then |
e4494292 | 8698 | return New_Occurrence_Of (RTE (RE_TK_Protected), Loc); |
4d744221 JM |
8699 | else |
8700 | pragma Assert (Ekind (Conc_Typ) = E_Task_Type); | |
e4494292 | 8701 | return New_Occurrence_Of (RTE (RE_TK_Task), Loc); |
4d744221 JM |
8702 | end if; |
8703 | ||
8704 | -- Regular tagged kinds | |
8705 | ||
8706 | else | |
8707 | if Is_Limited_Record (T) then | |
e4494292 | 8708 | return New_Occurrence_Of (RTE (RE_TK_Limited_Tagged), Loc); |
4d744221 | 8709 | else |
e4494292 | 8710 | return New_Occurrence_Of (RTE (RE_TK_Tagged), Loc); |
4d744221 JM |
8711 | end if; |
8712 | end if; | |
8713 | end Tagged_Kind; | |
8714 | ||
758c442c GD |
8715 | -------------- |
8716 | -- Write_DT -- | |
8717 | -------------- | |
8718 | ||
8719 | procedure Write_DT (Typ : Entity_Id) is | |
8720 | Elmt : Elmt_Id; | |
8721 | Prim : Node_Id; | |
8722 | ||
8723 | begin | |
8724 | -- Protect this procedure against wrong usage. Required because it will | |
8725 | -- be used directly from GDB | |
8726 | ||
b2e1beb3 | 8727 | if not (Typ <= Last_Node_Id) |
758c442c GD |
8728 | or else not Is_Tagged_Type (Typ) |
8729 | then | |
10b93b2e | 8730 | Write_Str ("wrong usage: Write_DT must be used with tagged types"); |
758c442c GD |
8731 | Write_Eol; |
8732 | return; | |
8733 | end if; | |
8734 | ||
8735 | Write_Int (Int (Typ)); | |
8736 | Write_Str (": "); | |
8737 | Write_Name (Chars (Typ)); | |
8738 | ||
8739 | if Is_Interface (Typ) then | |
8740 | Write_Str (" is interface"); | |
8741 | end if; | |
8742 | ||
8743 | Write_Eol; | |
8744 | ||
8745 | Elmt := First_Elmt (Primitive_Operations (Typ)); | |
8746 | while Present (Elmt) loop | |
8747 | Prim := Node (Elmt); | |
8748 | Write_Str (" - "); | |
8749 | ||
8750 | -- Indicate if this primitive will be allocated in the primary | |
8751 | -- dispatch table or in a secondary dispatch table associated | |
8752 | -- with an abstract interface type | |
8753 | ||
8754 | if Present (DTC_Entity (Prim)) then | |
3477e0b2 | 8755 | if Is_RTE (Etype (DTC_Entity (Prim)), RE_Tag) then |
758c442c GD |
8756 | Write_Str ("[P] "); |
8757 | else | |
8758 | Write_Str ("[s] "); | |
8759 | end if; | |
8760 | end if; | |
8761 | ||
8762 | -- Output the node of this primitive operation and its name | |
8763 | ||
8764 | Write_Int (Int (Prim)); | |
8765 | Write_Str (": "); | |
b0efe69e JM |
8766 | |
8767 | if Is_Predefined_Dispatching_Operation (Prim) then | |
8768 | Write_Str ("(predefined) "); | |
8769 | end if; | |
8770 | ||
74853971 AC |
8771 | -- Prefix the name of the primitive with its corresponding tagged |
8772 | -- type to facilitate seeing inherited primitives. | |
8773 | ||
8774 | if Present (Alias (Prim)) then | |
8775 | Write_Name | |
8776 | (Chars (Find_Dispatching_Type (Ultimate_Alias (Prim)))); | |
8777 | else | |
8778 | Write_Name (Chars (Typ)); | |
8779 | end if; | |
8780 | ||
8781 | Write_Str ("."); | |
758c442c GD |
8782 | Write_Name (Chars (Prim)); |
8783 | ||
8784 | -- Indicate if this primitive has an aliased primitive | |
8785 | ||
8786 | if Present (Alias (Prim)) then | |
8787 | Write_Str (" (alias = "); | |
8788 | Write_Int (Int (Alias (Prim))); | |
8789 | ||
8790 | -- If the DTC_Entity attribute is already set we can also output | |
3ce5ca75 | 8791 | -- the name of the interface covered by this primitive (if any). |
758c442c | 8792 | |
4a08c95c | 8793 | if Ekind (Alias (Prim)) in E_Function | E_Procedure |
22a83cea | 8794 | and then Present (DTC_Entity (Alias (Prim))) |
758c442c GD |
8795 | and then Is_Interface (Scope (DTC_Entity (Alias (Prim)))) |
8796 | then | |
8797 | Write_Str (" from interface "); | |
8798 | Write_Name (Chars (Scope (DTC_Entity (Alias (Prim))))); | |
8799 | end if; | |
8800 | ||
ce2b6ba5 | 8801 | if Present (Interface_Alias (Prim)) then |
758c442c | 8802 | Write_Str (", AI_Alias of "); |
bed8af19 AC |
8803 | |
8804 | if Is_Null_Interface_Primitive (Interface_Alias (Prim)) then | |
8805 | Write_Str ("null primitive "); | |
8806 | end if; | |
8807 | ||
ce2b6ba5 JM |
8808 | Write_Name |
8809 | (Chars (Find_Dispatching_Type (Interface_Alias (Prim)))); | |
758c442c | 8810 | Write_Char (':'); |
ce2b6ba5 | 8811 | Write_Int (Int (Interface_Alias (Prim))); |
758c442c GD |
8812 | end if; |
8813 | ||
8814 | Write_Str (")"); | |
8815 | end if; | |
8816 | ||
8817 | -- Display the final position of this primitive in its associated | |
6782b1ef | 8818 | -- (primary or secondary) dispatch table. |
758c442c GD |
8819 | |
8820 | if Present (DTC_Entity (Prim)) | |
8821 | and then DT_Position (Prim) /= No_Uint | |
8822 | then | |
8823 | Write_Str (" at #"); | |
8824 | Write_Int (UI_To_Int (DT_Position (Prim))); | |
8825 | end if; | |
8826 | ||
dee4682a | 8827 | if Is_Abstract_Subprogram (Prim) then |
758c442c | 8828 | Write_Str (" is abstract;"); |
bfef8d0d JM |
8829 | |
8830 | -- Check if this is a null primitive | |
8831 | ||
8832 | elsif Comes_From_Source (Prim) | |
8833 | and then Ekind (Prim) = E_Procedure | |
8834 | and then Null_Present (Parent (Prim)) | |
8835 | then | |
8836 | Write_Str (" is null;"); | |
758c442c GD |
8837 | end if; |
8838 | ||
361effb1 AC |
8839 | if Is_Eliminated (Ultimate_Alias (Prim)) then |
8840 | Write_Str (" (eliminated)"); | |
8841 | end if; | |
8842 | ||
cefce34c JM |
8843 | if Is_Imported (Prim) |
8844 | and then Convention (Prim) = Convention_CPP | |
8845 | then | |
8846 | Write_Str (" (C++)"); | |
8847 | end if; | |
8848 | ||
758c442c GD |
8849 | Write_Eol; |
8850 | ||
8851 | Next_Elmt (Elmt); | |
8852 | end loop; | |
8853 | end Write_DT; | |
8854 | ||
70482933 | 8855 | end Exp_Disp; |