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ee6ba406 | 1 | ------------------------------------------------------------------------------ |
2 | -- -- | |
3 | -- GNAT COMPILER COMPONENTS -- | |
4 | -- -- | |
5 | -- E X P _ D I S P -- | |
6 | -- -- | |
7 | -- B o d y -- | |
8 | -- -- | |
612930c1 | 9 | -- Copyright (C) 1992-2018, Free Software Foundation, Inc. -- |
ee6ba406 | 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- -- | |
24971415 | 13 | -- ware Foundation; either version 3, or (at your option) any later ver- -- |
ee6ba406 | 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 -- | |
24971415 | 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. -- | |
ee6ba406 | 20 | -- -- |
21 | -- GNAT was originally developed by the GNAT team at New York University. -- | |
e78e8c8e | 22 | -- Extensive contributions were provided by Ada Core Technologies Inc. -- |
ee6ba406 | 23 | -- -- |
24 | ------------------------------------------------------------------------------ | |
25 | ||
26 | with Atree; use Atree; | |
27 | with Checks; use Checks; | |
aad6babd | 28 | with Debug; use Debug; |
ee6ba406 | 29 | with Einfo; use Einfo; |
30 | with Elists; use Elists; | |
31 | with Errout; use Errout; | |
9a666241 | 32 | with Expander; use Expander; |
343d35dc | 33 | with Exp_Atag; use Exp_Atag; |
8a8d9086 | 34 | with Exp_Ch6; use Exp_Ch6; |
e00e091c | 35 | with Exp_CG; use Exp_CG; |
76a1c25b | 36 | with Exp_Dbug; use Exp_Dbug; |
ee6ba406 | 37 | with Exp_Tss; use Exp_Tss; |
38 | with Exp_Util; use Exp_Util; | |
af647dc7 | 39 | with Freeze; use Freeze; |
360b005f | 40 | with Ghost; use Ghost; |
ee6ba406 | 41 | with Itypes; use Itypes; |
b6b96867 | 42 | with Layout; use Layout; |
ee6ba406 | 43 | with Nlists; use Nlists; |
44 | with Nmake; use Nmake; | |
aad6babd | 45 | with Namet; use Namet; |
ee6ba406 | 46 | with Opt; use Opt; |
aad6babd | 47 | with Output; use Output; |
68f95949 | 48 | with Restrict; use Restrict; |
49 | with Rident; use Rident; | |
ee6ba406 | 50 | with Rtsfind; use Rtsfind; |
aad6babd | 51 | with Sem; use Sem; |
d60c9ff7 | 52 | with Sem_Aux; use Sem_Aux; |
725a69d2 | 53 | with Sem_Ch6; use Sem_Ch6; |
acf97c11 | 54 | with Sem_Ch7; use Sem_Ch7; |
725a69d2 | 55 | with Sem_Ch8; use Sem_Ch8; |
ee6ba406 | 56 | with Sem_Disp; use Sem_Disp; |
725a69d2 | 57 | with Sem_Eval; use Sem_Eval; |
ee6ba406 | 58 | with Sem_Res; use Sem_Res; |
aad6babd | 59 | with Sem_Type; use Sem_Type; |
ee6ba406 | 60 | with Sem_Util; use Sem_Util; |
61 | with Sinfo; use Sinfo; | |
62c62e4b | 62 | with Sinput; use Sinput; |
ee6ba406 | 63 | with Snames; use Snames; |
64 | with Stand; use Stand; | |
725a69d2 | 65 | with Stringt; use Stringt; |
5a44b136 | 66 | with SCIL_LL; use SCIL_LL; |
ee6ba406 | 67 | with Tbuild; use Tbuild; |
ee6ba406 | 68 | |
69 | package body Exp_Disp is | |
70 | ||
725a69d2 | 71 | ----------------------- |
72 | -- Local Subprograms -- | |
73 | ----------------------- | |
ee6ba406 | 74 | |
68f95949 | 75 | function Default_Prim_Op_Position (E : Entity_Id) return Uint; |
aad6babd | 76 | -- Ada 2005 (AI-251): Returns the fixed position in the dispatch table |
77 | -- of the default primitive operations. | |
78 | ||
24971415 | 79 | function Has_DT (Typ : Entity_Id) return Boolean; |
80 | pragma Inline (Has_DT); | |
81 | -- Returns true if we generate a dispatch table for tagged type Typ | |
82 | ||
af647dc7 | 83 | function Is_Predefined_Dispatching_Alias (Prim : Entity_Id) return Boolean; |
84 | -- Returns true if Prim is not a predefined dispatching primitive but it is | |
36b938a3 | 85 | -- an alias of a predefined dispatching primitive (i.e. through a renaming) |
af647dc7 | 86 | |
cd534f03 | 87 | function New_Value (From : Node_Id) return Node_Id; |
02a2406d | 88 | -- From is the original Expression. New_Value is equivalent to a call to |
89 | -- Duplicate_Subexpr with an explicit dereference when From is an access | |
90 | -- parameter. | |
cd534f03 | 91 | |
ee6ba406 | 92 | function Original_View_In_Visible_Part (Typ : Entity_Id) return Boolean; |
02a2406d | 93 | -- Check if the type has a private view or if the public view appears in |
94 | -- the visible part of a package spec. | |
ee6ba406 | 95 | |
d62940bf | 96 | function Prim_Op_Kind |
97 | (Prim : Entity_Id; | |
98 | Typ : Entity_Id) return Node_Id; | |
99 | -- Ada 2005 (AI-345): Determine the primitive operation kind of Prim | |
952af0b9 | 100 | -- according to its type Typ. Return a reference to an RE_Prim_Op_Kind |
d62940bf | 101 | -- enumeration value. |
aad6babd | 102 | |
952af0b9 | 103 | function Tagged_Kind (T : Entity_Id) return Node_Id; |
104 | -- Ada 2005 (AI-345): Determine the tagged kind of T and return a reference | |
105 | -- to an RE_Tagged_Kind enumeration value. | |
106 | ||
cd534f03 | 107 | ---------------------- |
108 | -- Apply_Tag_Checks -- | |
109 | ---------------------- | |
110 | ||
111 | procedure Apply_Tag_Checks (Call_Node : Node_Id) is | |
112 | Loc : constant Source_Ptr := Sloc (Call_Node); | |
113 | Ctrl_Arg : constant Node_Id := Controlling_Argument (Call_Node); | |
114 | Ctrl_Typ : constant Entity_Id := Base_Type (Etype (Ctrl_Arg)); | |
115 | Param_List : constant List_Id := Parameter_Associations (Call_Node); | |
116 | ||
117 | Subp : Entity_Id; | |
118 | CW_Typ : Entity_Id; | |
119 | Param : Node_Id; | |
120 | Typ : Entity_Id; | |
121 | Eq_Prim_Op : Entity_Id := Empty; | |
122 | ||
123 | begin | |
124 | if No_Run_Time_Mode then | |
125 | Error_Msg_CRT ("tagged types", Call_Node); | |
126 | return; | |
127 | end if; | |
128 | ||
02a2406d | 129 | -- Apply_Tag_Checks is called directly from the semantics, so we |
130 | -- need a check to see whether expansion is active before proceeding. | |
131 | -- In addition, there is no need to expand the call when compiling | |
132 | -- under restriction No_Dispatching_Calls; the semantic analyzer has | |
cd534f03 | 133 | -- previously notified the violation of this restriction. |
134 | ||
135 | if not Expander_Active | |
136 | or else Restriction_Active (No_Dispatching_Calls) | |
137 | then | |
138 | return; | |
139 | end if; | |
140 | ||
141 | -- Set subprogram. If this is an inherited operation that was | |
142 | -- overridden, the body that is being called is its alias. | |
143 | ||
144 | Subp := Entity (Name (Call_Node)); | |
145 | ||
146 | if Present (Alias (Subp)) | |
147 | and then Is_Inherited_Operation (Subp) | |
148 | and then No (DTC_Entity (Subp)) | |
149 | then | |
150 | Subp := Alias (Subp); | |
151 | end if; | |
152 | ||
153 | -- Definition of the class-wide type and the tagged type | |
154 | ||
155 | -- If the controlling argument is itself a tag rather than a tagged | |
156 | -- object, then use the class-wide type associated with the subprogram's | |
157 | -- controlling type. This case can occur when a call to an inherited | |
158 | -- primitive has an actual that originated from a default parameter | |
159 | -- given by a tag-indeterminate call and when there is no other | |
160 | -- controlling argument providing the tag (AI-239 requires dispatching). | |
161 | -- This capability of dispatching directly by tag is also needed by the | |
162 | -- implementation of AI-260 (for the generic dispatching constructors). | |
163 | ||
164 | if Ctrl_Typ = RTE (RE_Tag) | |
165 | or else (RTE_Available (RE_Interface_Tag) | |
166 | and then Ctrl_Typ = RTE (RE_Interface_Tag)) | |
167 | then | |
168 | CW_Typ := Class_Wide_Type (Find_Dispatching_Type (Subp)); | |
169 | ||
170 | -- Class_Wide_Type is applied to the expressions used to initialize | |
171 | -- CW_Typ, to ensure that CW_Typ always denotes a class-wide type, since | |
172 | -- there are cases where the controlling type is resolved to a specific | |
173 | -- type (such as for designated types of arguments such as CW'Access). | |
174 | ||
175 | elsif Is_Access_Type (Ctrl_Typ) then | |
176 | CW_Typ := Class_Wide_Type (Designated_Type (Ctrl_Typ)); | |
177 | ||
178 | else | |
179 | CW_Typ := Class_Wide_Type (Ctrl_Typ); | |
180 | end if; | |
181 | ||
bb5dfacc | 182 | Typ := Find_Specific_Type (CW_Typ); |
cd534f03 | 183 | |
184 | if not Is_Limited_Type (Typ) then | |
185 | Eq_Prim_Op := Find_Prim_Op (Typ, Name_Op_Eq); | |
186 | end if; | |
187 | ||
188 | -- Dispatching call to C++ primitive | |
189 | ||
190 | if Is_CPP_Class (Typ) then | |
191 | null; | |
192 | ||
193 | -- Dispatching call to Ada primitive | |
194 | ||
195 | elsif Present (Param_List) then | |
196 | ||
197 | -- Generate the Tag checks when appropriate | |
198 | ||
199 | Param := First_Actual (Call_Node); | |
200 | while Present (Param) loop | |
201 | ||
202 | -- No tag check with itself | |
203 | ||
204 | if Param = Ctrl_Arg then | |
205 | null; | |
206 | ||
207 | -- No tag check for parameter whose type is neither tagged nor | |
208 | -- access to tagged (for access parameters) | |
209 | ||
210 | elsif No (Find_Controlling_Arg (Param)) then | |
211 | null; | |
212 | ||
213 | -- No tag check for function dispatching on result if the | |
214 | -- Tag given by the context is this one | |
215 | ||
216 | elsif Find_Controlling_Arg (Param) = Ctrl_Arg then | |
217 | null; | |
218 | ||
02a2406d | 219 | -- "=" is the only dispatching operation allowed to get operands |
220 | -- with incompatible tags (it just returns false). We use | |
221 | -- Duplicate_Subexpr_Move_Checks instead of calling Relocate_Node | |
222 | -- because the value will be duplicated to check the tags. | |
cd534f03 | 223 | |
224 | elsif Subp = Eq_Prim_Op then | |
225 | null; | |
226 | ||
227 | -- No check in presence of suppress flags | |
228 | ||
229 | elsif Tag_Checks_Suppressed (Etype (Param)) | |
230 | or else (Is_Access_Type (Etype (Param)) | |
231 | and then Tag_Checks_Suppressed | |
232 | (Designated_Type (Etype (Param)))) | |
233 | then | |
234 | null; | |
235 | ||
236 | -- Optimization: no tag checks if the parameters are identical | |
237 | ||
238 | elsif Is_Entity_Name (Param) | |
239 | and then Is_Entity_Name (Ctrl_Arg) | |
240 | and then Entity (Param) = Entity (Ctrl_Arg) | |
241 | then | |
242 | null; | |
243 | ||
244 | -- Now we need to generate the Tag check | |
245 | ||
246 | else | |
247 | -- Generate code for tag equality check | |
02a2406d | 248 | |
cd534f03 | 249 | -- Perhaps should have Checks.Apply_Tag_Equality_Check??? |
250 | ||
251 | Insert_Action (Ctrl_Arg, | |
252 | Make_Implicit_If_Statement (Call_Node, | |
253 | Condition => | |
254 | Make_Op_Ne (Loc, | |
255 | Left_Opnd => | |
256 | Make_Selected_Component (Loc, | |
257 | Prefix => New_Value (Ctrl_Arg), | |
258 | Selector_Name => | |
83c6c069 | 259 | New_Occurrence_Of |
cd534f03 | 260 | (First_Tag_Component (Typ), Loc)), |
261 | ||
262 | Right_Opnd => | |
263 | Make_Selected_Component (Loc, | |
264 | Prefix => | |
265 | Unchecked_Convert_To (Typ, New_Value (Param)), | |
266 | Selector_Name => | |
83c6c069 | 267 | New_Occurrence_Of |
cd534f03 | 268 | (First_Tag_Component (Typ), Loc))), |
269 | ||
270 | Then_Statements => | |
271 | New_List (New_Constraint_Error (Loc)))); | |
272 | end if; | |
273 | ||
274 | Next_Actual (Param); | |
275 | end loop; | |
276 | end if; | |
277 | end Apply_Tag_Checks; | |
278 | ||
24971415 | 279 | ------------------------ |
280 | -- Building_Static_DT -- | |
281 | ------------------------ | |
282 | ||
283 | function Building_Static_DT (Typ : Entity_Id) return Boolean is | |
c930fde5 | 284 | Root_Typ : Entity_Id := Root_Type (Typ); |
285 | Static_DT : Boolean; | |
cc60bd16 | 286 | |
24971415 | 287 | begin |
cc60bd16 | 288 | -- Handle private types |
289 | ||
290 | if Present (Full_View (Root_Typ)) then | |
291 | Root_Typ := Full_View (Root_Typ); | |
292 | end if; | |
293 | ||
f7c9b330 | 294 | Static_DT := |
295 | Building_Static_Dispatch_Tables | |
296 | and then Is_Library_Level_Tagged_Type (Typ) | |
e7e688dd | 297 | |
f7c9b330 | 298 | -- If the type is derived from a CPP class we cannot statically |
299 | -- build the dispatch tables because we must inherit primitives | |
300 | -- from the CPP side. | |
e7e688dd | 301 | |
f7c9b330 | 302 | and then not Is_CPP_Class (Root_Typ); |
c930fde5 | 303 | |
304 | if not Static_DT then | |
305 | Check_Restriction (Static_Dispatch_Tables, Typ); | |
306 | end if; | |
307 | ||
308 | return Static_DT; | |
24971415 | 309 | end Building_Static_DT; |
310 | ||
9a666241 | 311 | ---------------------------------- |
312 | -- Building_Static_Secondary_DT -- | |
313 | ---------------------------------- | |
314 | ||
315 | function Building_Static_Secondary_DT (Typ : Entity_Id) return Boolean is | |
c930fde5 | 316 | Full_Typ : Entity_Id := Typ; |
317 | Root_Typ : Entity_Id := Root_Type (Typ); | |
318 | Static_DT : Boolean; | |
9a666241 | 319 | |
320 | begin | |
321 | -- Handle private types | |
322 | ||
323 | if Present (Full_View (Typ)) then | |
324 | Full_Typ := Full_View (Typ); | |
325 | end if; | |
326 | ||
327 | if Present (Full_View (Root_Typ)) then | |
328 | Root_Typ := Full_View (Root_Typ); | |
329 | end if; | |
330 | ||
f7c9b330 | 331 | Static_DT := |
332 | Building_Static_DT (Full_Typ) | |
333 | and then not Is_Interface (Full_Typ) | |
334 | and then Has_Interfaces (Full_Typ) | |
335 | and then (Full_Typ = Root_Typ | |
336 | or else not Is_Variable_Size_Record (Etype (Full_Typ))); | |
c930fde5 | 337 | |
338 | if not Static_DT | |
339 | and then not Is_Interface (Full_Typ) | |
340 | and then Has_Interfaces (Full_Typ) | |
341 | then | |
342 | Check_Restriction (Static_Dispatch_Tables, Typ); | |
343 | end if; | |
344 | ||
345 | return Static_DT; | |
9a666241 | 346 | end Building_Static_Secondary_DT; |
347 | ||
17e14451 | 348 | ---------------------------------- |
349 | -- Build_Static_Dispatch_Tables -- | |
350 | ---------------------------------- | |
351 | ||
352 | procedure Build_Static_Dispatch_Tables (N : Entity_Id) is | |
353 | Target_List : List_Id; | |
354 | ||
355 | procedure Build_Dispatch_Tables (List : List_Id); | |
356 | -- Build the static dispatch table of tagged types found in the list of | |
357 | -- declarations. The generated nodes are added at the end of Target_List | |
358 | ||
359 | procedure Build_Package_Dispatch_Tables (N : Node_Id); | |
360 | -- Build static dispatch tables associated with package declaration N | |
361 | ||
362 | --------------------------- | |
363 | -- Build_Dispatch_Tables -- | |
364 | --------------------------- | |
365 | ||
366 | procedure Build_Dispatch_Tables (List : List_Id) is | |
367 | D : Node_Id; | |
368 | ||
369 | begin | |
370 | D := First (List); | |
371 | while Present (D) loop | |
372 | ||
373 | -- Handle nested packages and package bodies recursively. The | |
374 | -- generated code is placed on the Target_List established for | |
375 | -- the enclosing compilation unit. | |
376 | ||
377 | if Nkind (D) = N_Package_Declaration then | |
378 | Build_Package_Dispatch_Tables (D); | |
379 | ||
380 | elsif Nkind (D) = N_Package_Body then | |
381 | Build_Dispatch_Tables (Declarations (D)); | |
382 | ||
383 | elsif Nkind (D) = N_Package_Body_Stub | |
384 | and then Present (Library_Unit (D)) | |
385 | then | |
386 | Build_Dispatch_Tables | |
387 | (Declarations (Proper_Body (Unit (Library_Unit (D))))); | |
388 | ||
02a2406d | 389 | -- Handle full type declarations and derivations of library level |
390 | -- tagged types | |
17e14451 | 391 | |
3164ed99 | 392 | elsif Nkind_In (D, N_Full_Type_Declaration, |
393 | N_Derived_Type_Definition) | |
17e14451 | 394 | and then Is_Library_Level_Tagged_Type (Defining_Entity (D)) |
395 | and then Ekind (Defining_Entity (D)) /= E_Record_Subtype | |
396 | and then not Is_Private_Type (Defining_Entity (D)) | |
397 | then | |
442049cc | 398 | -- We do not generate dispatch tables for the internal types |
d9fac90e | 399 | -- created for a type extension with unknown discriminants |
400 | -- The needed information is shared with the source type, | |
401 | -- See Expand_N_Record_Extension. | |
402 | ||
442049cc | 403 | if Is_Underlying_Record_View (Defining_Entity (D)) |
404 | or else | |
405 | (not Comes_From_Source (Defining_Entity (D)) | |
406 | and then | |
2f29393f | 407 | Has_Unknown_Discriminants (Etype (Defining_Entity (D))) |
442049cc | 408 | and then |
2f29393f | 409 | not Comes_From_Source |
410 | (First_Subtype (Defining_Entity (D)))) | |
d9fac90e | 411 | then |
412 | null; | |
d9fac90e | 413 | else |
414 | Insert_List_After_And_Analyze (Last (Target_List), | |
415 | Make_DT (Defining_Entity (D))); | |
416 | end if; | |
17e14451 | 417 | |
418 | -- Handle private types of library level tagged types. We must | |
419 | -- exchange the private and full-view to ensure the correct | |
a735d663 | 420 | -- expansion. If the full view is a synchronized type ignore |
421 | -- the type because the table will be built for the corresponding | |
422 | -- record type, that has its own declaration. | |
17e14451 | 423 | |
424 | elsif (Nkind (D) = N_Private_Type_Declaration | |
425 | or else Nkind (D) = N_Private_Extension_Declaration) | |
426 | and then Present (Full_View (Defining_Entity (D))) | |
17e14451 | 427 | then |
428 | declare | |
acf97c11 | 429 | E1 : constant Entity_Id := Defining_Entity (D); |
a735d663 | 430 | E2 : constant Entity_Id := Full_View (E1); |
acf97c11 | 431 | |
17e14451 | 432 | begin |
a735d663 | 433 | if Is_Library_Level_Tagged_Type (E2) |
434 | and then Ekind (E2) /= E_Record_Subtype | |
435 | and then not Is_Concurrent_Type (E2) | |
436 | then | |
437 | Exchange_Declarations (E1); | |
438 | Insert_List_After_And_Analyze (Last (Target_List), | |
439 | Make_DT (E1)); | |
440 | Exchange_Declarations (E2); | |
441 | end if; | |
17e14451 | 442 | end; |
443 | end if; | |
444 | ||
445 | Next (D); | |
446 | end loop; | |
447 | end Build_Dispatch_Tables; | |
448 | ||
449 | ----------------------------------- | |
450 | -- Build_Package_Dispatch_Tables -- | |
451 | ----------------------------------- | |
452 | ||
453 | procedure Build_Package_Dispatch_Tables (N : Node_Id) is | |
454 | Spec : constant Node_Id := Specification (N); | |
455 | Id : constant Entity_Id := Defining_Entity (N); | |
456 | Vis_Decls : constant List_Id := Visible_Declarations (Spec); | |
457 | Priv_Decls : constant List_Id := Private_Declarations (Spec); | |
458 | ||
459 | begin | |
460 | Push_Scope (Id); | |
461 | ||
462 | if Present (Priv_Decls) then | |
463 | Build_Dispatch_Tables (Vis_Decls); | |
464 | Build_Dispatch_Tables (Priv_Decls); | |
465 | ||
466 | elsif Present (Vis_Decls) then | |
467 | Build_Dispatch_Tables (Vis_Decls); | |
468 | end if; | |
469 | ||
470 | Pop_Scope; | |
471 | end Build_Package_Dispatch_Tables; | |
472 | ||
473 | -- Start of processing for Build_Static_Dispatch_Tables | |
474 | ||
475 | begin | |
476 | if not Expander_Active | |
662256db | 477 | or else not Tagged_Type_Expansion |
17e14451 | 478 | then |
479 | return; | |
480 | end if; | |
481 | ||
482 | if Nkind (N) = N_Package_Declaration then | |
483 | declare | |
484 | Spec : constant Node_Id := Specification (N); | |
485 | Vis_Decls : constant List_Id := Visible_Declarations (Spec); | |
486 | Priv_Decls : constant List_Id := Private_Declarations (Spec); | |
487 | ||
488 | begin | |
489 | if Present (Priv_Decls) | |
490 | and then Is_Non_Empty_List (Priv_Decls) | |
491 | then | |
492 | Target_List := Priv_Decls; | |
493 | ||
494 | elsif not Present (Vis_Decls) then | |
495 | Target_List := New_List; | |
496 | Set_Private_Declarations (Spec, Target_List); | |
497 | else | |
498 | Target_List := Vis_Decls; | |
499 | end if; | |
500 | ||
501 | Build_Package_Dispatch_Tables (N); | |
502 | end; | |
503 | ||
504 | else pragma Assert (Nkind (N) = N_Package_Body); | |
505 | Target_List := Declarations (N); | |
506 | Build_Dispatch_Tables (Target_List); | |
507 | end if; | |
508 | end Build_Static_Dispatch_Tables; | |
509 | ||
f235fede | 510 | ------------------------------ |
511 | -- Convert_Tag_To_Interface -- | |
512 | ------------------------------ | |
513 | ||
514 | function Convert_Tag_To_Interface | |
515 | (Typ : Entity_Id; | |
516 | Expr : Node_Id) return Node_Id | |
517 | is | |
518 | Loc : constant Source_Ptr := Sloc (Expr); | |
519 | Anon_Type : Entity_Id; | |
520 | Result : Node_Id; | |
521 | ||
522 | begin | |
523 | pragma Assert (Is_Class_Wide_Type (Typ) | |
524 | and then Is_Interface (Typ) | |
525 | and then | |
526 | ((Nkind (Expr) = N_Selected_Component | |
4c58ddd7 | 527 | and then Is_Tag (Entity (Selector_Name (Expr)))) |
f235fede | 528 | or else |
529 | (Nkind (Expr) = N_Function_Call | |
4c58ddd7 | 530 | and then RTE_Available (RE_Displace) |
531 | and then Entity (Name (Expr)) = RTE (RE_Displace)))); | |
f235fede | 532 | |
533 | Anon_Type := Create_Itype (E_Anonymous_Access_Type, Expr); | |
534 | Set_Directly_Designated_Type (Anon_Type, Typ); | |
535 | Set_Etype (Anon_Type, Anon_Type); | |
536 | Set_Can_Never_Be_Null (Anon_Type); | |
537 | ||
538 | -- Decorate the size and alignment attributes of the anonymous access | |
02a2406d | 539 | -- type, as required by the back end. |
f235fede | 540 | |
541 | Layout_Type (Anon_Type); | |
542 | ||
543 | if Nkind (Expr) = N_Selected_Component | |
544 | and then Is_Tag (Entity (Selector_Name (Expr))) | |
545 | then | |
546 | Result := | |
547 | Make_Explicit_Dereference (Loc, | |
548 | Unchecked_Convert_To (Anon_Type, | |
549 | Make_Attribute_Reference (Loc, | |
550 | Prefix => Expr, | |
551 | Attribute_Name => Name_Address))); | |
552 | else | |
553 | Result := | |
554 | Make_Explicit_Dereference (Loc, | |
555 | Unchecked_Convert_To (Anon_Type, Expr)); | |
556 | end if; | |
557 | ||
558 | return Result; | |
559 | end Convert_Tag_To_Interface; | |
560 | ||
d00681a7 | 561 | ------------------- |
562 | -- CPP_Num_Prims -- | |
563 | ------------------- | |
564 | ||
565 | function CPP_Num_Prims (Typ : Entity_Id) return Nat is | |
566 | CPP_Typ : Entity_Id; | |
567 | Tag_Comp : Entity_Id; | |
568 | ||
569 | begin | |
570 | if not Is_Tagged_Type (Typ) | |
571 | or else not Is_CPP_Class (Root_Type (Typ)) | |
572 | then | |
573 | return 0; | |
574 | ||
575 | else | |
576 | CPP_Typ := Enclosing_CPP_Parent (Typ); | |
577 | Tag_Comp := First_Tag_Component (CPP_Typ); | |
578 | ||
02a2406d | 579 | -- If number of primitives already set in the tag component, use it |
d00681a7 | 580 | |
581 | if Present (Tag_Comp) | |
582 | and then DT_Entry_Count (Tag_Comp) /= No_Uint | |
583 | then | |
584 | return UI_To_Int (DT_Entry_Count (Tag_Comp)); | |
585 | ||
586 | -- Otherwise, count the primitives of the enclosing CPP type | |
587 | ||
588 | else | |
589 | declare | |
590 | Count : Nat := 0; | |
591 | Elmt : Elmt_Id; | |
592 | ||
593 | begin | |
594 | Elmt := First_Elmt (Primitive_Operations (CPP_Typ)); | |
595 | while Present (Elmt) loop | |
596 | Count := Count + 1; | |
597 | Next_Elmt (Elmt); | |
598 | end loop; | |
599 | ||
600 | return Count; | |
601 | end; | |
602 | end if; | |
603 | end if; | |
604 | end CPP_Num_Prims; | |
605 | ||
aad6babd | 606 | ------------------------------ |
607 | -- Default_Prim_Op_Position -- | |
608 | ------------------------------ | |
609 | ||
68f95949 | 610 | function Default_Prim_Op_Position (E : Entity_Id) return Uint is |
aad6babd | 611 | TSS_Name : TSS_Name_Type; |
aad6babd | 612 | |
613 | begin | |
aad6babd | 614 | Get_Name_String (Chars (E)); |
615 | TSS_Name := | |
616 | TSS_Name_Type | |
617 | (Name_Buffer (Name_Len - TSS_Name'Length + 1 .. Name_Len)); | |
618 | ||
619 | if Chars (E) = Name_uSize then | |
620 | return Uint_1; | |
621 | ||
aad6babd | 622 | elsif TSS_Name = TSS_Stream_Read then |
208fd589 | 623 | return Uint_2; |
aad6babd | 624 | |
625 | elsif TSS_Name = TSS_Stream_Write then | |
208fd589 | 626 | return Uint_3; |
aad6babd | 627 | |
628 | elsif TSS_Name = TSS_Stream_Input then | |
208fd589 | 629 | return Uint_4; |
aad6babd | 630 | |
631 | elsif TSS_Name = TSS_Stream_Output then | |
208fd589 | 632 | return Uint_5; |
aad6babd | 633 | |
634 | elsif Chars (E) = Name_Op_Eq then | |
208fd589 | 635 | return Uint_6; |
aad6babd | 636 | |
637 | elsif Chars (E) = Name_uAssign then | |
208fd589 | 638 | return Uint_7; |
aad6babd | 639 | |
640 | elsif TSS_Name = TSS_Deep_Adjust then | |
208fd589 | 641 | return Uint_8; |
aad6babd | 642 | |
643 | elsif TSS_Name = TSS_Deep_Finalize then | |
208fd589 | 644 | return Uint_9; |
aad6babd | 645 | |
6cb4b973 | 646 | -- In VM targets unconditionally allow obtaining the position associated |
647 | -- with predefined interface primitives since in these platforms any | |
648 | -- tagged type has these primitives. | |
649 | ||
650 | elsif Ada_Version >= Ada_2005 or else not Tagged_Type_Expansion then | |
76a1c25b | 651 | if Chars (E) = Name_uDisp_Asynchronous_Select then |
208fd589 | 652 | return Uint_10; |
d62940bf | 653 | |
76a1c25b | 654 | elsif Chars (E) = Name_uDisp_Conditional_Select then |
208fd589 | 655 | return Uint_11; |
d62940bf | 656 | |
76a1c25b | 657 | elsif Chars (E) = Name_uDisp_Get_Prim_Op_Kind then |
208fd589 | 658 | return Uint_12; |
d62940bf | 659 | |
76a1c25b | 660 | elsif Chars (E) = Name_uDisp_Get_Task_Id then |
208fd589 | 661 | return Uint_13; |
d62940bf | 662 | |
cdb1c38f | 663 | elsif Chars (E) = Name_uDisp_Requeue then |
208fd589 | 664 | return Uint_14; |
cdb1c38f | 665 | |
666 | elsif Chars (E) = Name_uDisp_Timed_Select then | |
208fd589 | 667 | return Uint_15; |
76a1c25b | 668 | end if; |
aad6babd | 669 | end if; |
76a1c25b | 670 | |
671 | raise Program_Error; | |
aad6babd | 672 | end Default_Prim_Op_Position; |
673 | ||
1f0c90bb | 674 | ---------------------- |
675 | -- Elab_Flag_Needed -- | |
676 | ---------------------- | |
677 | ||
678 | function Elab_Flag_Needed (Typ : Entity_Id) return Boolean is | |
679 | begin | |
680 | return Ada_Version >= Ada_2005 | |
681 | and then not Is_Interface (Typ) | |
40771d7e | 682 | and then Has_Interfaces (Typ) |
683 | and then not Building_Static_DT (Typ); | |
1f0c90bb | 684 | end Elab_Flag_Needed; |
685 | ||
7189d17f | 686 | ----------------------------- |
687 | -- Expand_Dispatching_Call -- | |
688 | ----------------------------- | |
ee6ba406 | 689 | |
7189d17f | 690 | procedure Expand_Dispatching_Call (Call_Node : Node_Id) is |
ee6ba406 | 691 | Loc : constant Source_Ptr := Sloc (Call_Node); |
692 | Call_Typ : constant Entity_Id := Etype (Call_Node); | |
693 | ||
2ea346ac | 694 | Ctrl_Arg : constant Node_Id := Controlling_Argument (Call_Node); |
695 | Ctrl_Typ : constant Entity_Id := Base_Type (Etype (Ctrl_Arg)); | |
696 | Param_List : constant List_Id := Parameter_Associations (Call_Node); | |
ee6ba406 | 697 | |
af647dc7 | 698 | Subp : Entity_Id; |
7189d17f | 699 | CW_Typ : Entity_Id; |
700 | New_Call : Node_Id; | |
701 | New_Call_Name : Node_Id; | |
702 | New_Params : List_Id := No_List; | |
703 | Param : Node_Id; | |
704 | Res_Typ : Entity_Id; | |
705 | Subp_Ptr_Typ : Entity_Id; | |
706 | Subp_Typ : Entity_Id; | |
707 | Typ : Entity_Id; | |
708 | Eq_Prim_Op : Entity_Id := Empty; | |
709 | Controlling_Tag : Node_Id; | |
ee6ba406 | 710 | |
62c62e4b | 711 | procedure Build_Class_Wide_Check; |
be1bb0b1 | 712 | -- If the denoted subprogram has a class-wide precondition, generate a |
713 | -- check using that precondition before the dispatching call, because | |
62c62e4b | 714 | -- this is the only class-wide precondition that applies to the call. |
715 | ||
ee6ba406 | 716 | function New_Value (From : Node_Id) return Node_Id; |
9dfe12ae | 717 | -- From is the original Expression. New_Value is equivalent to a call |
718 | -- to Duplicate_Subexpr with an explicit dereference when From is an | |
7189d17f | 719 | -- access parameter. |
720 | ||
62c62e4b | 721 | ---------------------------- |
722 | -- Build_Class_Wide_Check -- | |
723 | ---------------------------- | |
724 | ||
725 | procedure Build_Class_Wide_Check is | |
62c62e4b | 726 | function Replace_Formals (N : Node_Id) return Traverse_Result; |
727 | -- Replace occurrences of the formals of the subprogram by the | |
728 | -- corresponding actuals in the call, given that this check is | |
729 | -- performed outside of the body of the subprogram. | |
730 | ||
731 | --------------------- | |
732 | -- Replace_Formals -- | |
733 | --------------------- | |
734 | ||
735 | function Replace_Formals (N : Node_Id) return Traverse_Result is | |
736 | begin | |
737 | if Is_Entity_Name (N) | |
738 | and then Present (Entity (N)) | |
739 | and then Is_Formal (Entity (N)) | |
740 | then | |
741 | declare | |
742 | A : Node_Id; | |
743 | F : Entity_Id; | |
744 | ||
745 | begin | |
746 | F := First_Formal (Subp); | |
747 | A := First_Actual (Call_Node); | |
748 | while Present (F) loop | |
749 | if F = Entity (N) then | |
750 | Rewrite (N, New_Copy_Tree (A)); | |
eba9690d | 751 | |
752 | -- If the formal is class-wide, and thus not a | |
753 | -- controlling argument, preserve its type because | |
754 | -- it may appear in a nested call with a class-wide | |
755 | -- parameter. | |
756 | ||
757 | if Is_Class_Wide_Type (Etype (F)) then | |
758 | Set_Etype (N, Etype (F)); | |
0f3c49a4 | 759 | |
760 | -- Conversely, if this is a controlling argument | |
c5685d96 | 761 | -- (in a dispatching call in the condition) that is a |
762 | -- dereference, the source is an access-to-class-wide | |
763 | -- type, so preserve the dispatching nature of the | |
764 | -- call in the rewritten condition. | |
0f3c49a4 | 765 | |
766 | elsif Nkind (Parent (N)) = N_Explicit_Dereference | |
767 | and then Is_Controlling_Actual (Parent (N)) | |
768 | then | |
769 | Set_Controlling_Argument (Parent (Parent (N)), | |
770 | Parent (N)); | |
eba9690d | 771 | end if; |
772 | ||
62c62e4b | 773 | exit; |
774 | end if; | |
be1bb0b1 | 775 | |
62c62e4b | 776 | Next_Formal (F); |
777 | Next_Actual (A); | |
778 | end loop; | |
779 | end; | |
780 | end if; | |
781 | ||
782 | return OK; | |
783 | end Replace_Formals; | |
784 | ||
785 | procedure Update is new Traverse_Proc (Replace_Formals); | |
be1bb0b1 | 786 | |
787 | -- Local variables | |
788 | ||
789 | Str_Loc : constant String := Build_Location_String (Loc); | |
790 | ||
791 | Cond : Node_Id; | |
792 | Msg : Node_Id; | |
793 | Prec : Node_Id; | |
794 | ||
795 | -- Start of processing for Build_Class_Wide_Check | |
796 | ||
62c62e4b | 797 | begin |
798 | ||
799 | -- Locate class-wide precondition, if any | |
800 | ||
801 | if Present (Contract (Subp)) | |
802 | and then Present (Pre_Post_Conditions (Contract (Subp))) | |
803 | then | |
804 | Prec := Pre_Post_Conditions (Contract (Subp)); | |
805 | ||
806 | while Present (Prec) loop | |
807 | exit when Pragma_Name (Prec) = Name_Precondition | |
808 | and then Class_Present (Prec); | |
809 | Prec := Next_Pragma (Prec); | |
810 | end loop; | |
811 | ||
19d786c3 | 812 | if No (Prec) or else Is_Ignored (Prec) then |
62c62e4b | 813 | return; |
814 | end if; | |
815 | ||
816 | -- The expression for the precondition is analyzed within the | |
be1bb0b1 | 817 | -- generated pragma. The message text is the last parameter of |
818 | -- the generated pragma, indicating source of precondition. | |
62c62e4b | 819 | |
be1bb0b1 | 820 | Cond := |
821 | New_Copy_Tree | |
822 | (Expression (First (Pragma_Argument_Associations (Prec)))); | |
62c62e4b | 823 | Update (Cond); |
824 | ||
825 | -- Build message indicating the failed precondition and the | |
826 | -- dispatching call that caused it. | |
827 | ||
828 | Msg := Expression (Last (Pragma_Argument_Associations (Prec))); | |
829 | Name_Len := 0; | |
830 | Append (Global_Name_Buffer, Strval (Msg)); | |
831 | Append (Global_Name_Buffer, " in dispatching call at "); | |
832 | Append (Global_Name_Buffer, Str_Loc); | |
833 | Msg := Make_String_Literal (Loc, Name_Buffer (1 .. Name_Len)); | |
834 | ||
835 | Insert_Action (Call_Node, | |
be1bb0b1 | 836 | Make_If_Statement (Loc, |
837 | Condition => Make_Op_Not (Loc, Cond), | |
838 | Then_Statements => New_List ( | |
839 | Make_Procedure_Call_Statement (Loc, | |
840 | Name => | |
841 | New_Occurrence_Of (RTE (RE_Raise_Assert_Failure), Loc), | |
842 | Parameter_Associations => New_List (Msg))))); | |
62c62e4b | 843 | end if; |
844 | end Build_Class_Wide_Check; | |
845 | ||
9dfe12ae | 846 | --------------- |
847 | -- New_Value -- | |
848 | --------------- | |
849 | ||
ee6ba406 | 850 | function New_Value (From : Node_Id) return Node_Id is |
851 | Res : constant Node_Id := Duplicate_Subexpr (From); | |
ee6ba406 | 852 | begin |
853 | if Is_Access_Type (Etype (From)) then | |
af647dc7 | 854 | return |
855 | Make_Explicit_Dereference (Sloc (From), | |
856 | Prefix => Res); | |
ee6ba406 | 857 | else |
858 | return Res; | |
859 | end if; | |
860 | end New_Value; | |
861 | ||
d215f619 | 862 | -- Local variables |
863 | ||
5a44b136 | 864 | New_Node : Node_Id; |
16149377 | 865 | SCIL_Node : Node_Id := Empty; |
5a44b136 | 866 | SCIL_Related_Node : Node_Id := Call_Node; |
d215f619 | 867 | |
7189d17f | 868 | -- Start of processing for Expand_Dispatching_Call |
ee6ba406 | 869 | |
870 | begin | |
725a69d2 | 871 | if No_Run_Time_Mode then |
872 | Error_Msg_CRT ("tagged types", Call_Node); | |
873 | return; | |
874 | end if; | |
875 | ||
02a2406d | 876 | -- Expand_Dispatching_Call is called directly from the semantics, so we |
877 | -- only proceed if the expander is active. | |
343d35dc | 878 | |
a33565dd | 879 | if not Expander_Active |
0f3b1f49 | 880 | |
881 | -- And there is no need to expand the call if we are compiling under | |
882 | -- restriction No_Dispatching_Calls; the semantic analyzer has | |
883 | -- previously notified the violation of this restriction. | |
884 | ||
343d35dc | 885 | or else Restriction_Active (No_Dispatching_Calls) |
687b5687 | 886 | |
887 | -- No action needed if the dispatching call has been already expanded | |
888 | ||
889 | or else Is_Expanded_Dispatching_Call (Name (Call_Node)) | |
343d35dc | 890 | then |
891 | return; | |
892 | end if; | |
68f95949 | 893 | |
af647dc7 | 894 | -- Set subprogram. If this is an inherited operation that was |
895 | -- overridden, the body that is being called is its alias. | |
896 | ||
897 | Subp := Entity (Name (Call_Node)); | |
ee6ba406 | 898 | |
899 | if Present (Alias (Subp)) | |
900 | and then Is_Inherited_Operation (Subp) | |
901 | and then No (DTC_Entity (Subp)) | |
902 | then | |
903 | Subp := Alias (Subp); | |
904 | end if; | |
905 | ||
62c62e4b | 906 | Build_Class_Wide_Check; |
907 | ||
7189d17f | 908 | -- Definition of the class-wide type and the tagged type |
ee6ba406 | 909 | |
7189d17f | 910 | -- If the controlling argument is itself a tag rather than a tagged |
911 | -- object, then use the class-wide type associated with the subprogram's | |
912 | -- controlling type. This case can occur when a call to an inherited | |
913 | -- primitive has an actual that originated from a default parameter | |
914 | -- given by a tag-indeterminate call and when there is no other | |
915 | -- controlling argument providing the tag (AI-239 requires dispatching). | |
916 | -- This capability of dispatching directly by tag is also needed by the | |
917 | -- implementation of AI-260 (for the generic dispatching constructors). | |
918 | ||
2ea346ac | 919 | if Ctrl_Typ = RTE (RE_Tag) |
68f95949 | 920 | or else (RTE_Available (RE_Interface_Tag) |
2ea346ac | 921 | and then Ctrl_Typ = RTE (RE_Interface_Tag)) |
aad6babd | 922 | then |
af647dc7 | 923 | CW_Typ := Class_Wide_Type (Find_Dispatching_Type (Subp)); |
7189d17f | 924 | |
725a69d2 | 925 | -- Class_Wide_Type is applied to the expressions used to initialize |
926 | -- CW_Typ, to ensure that CW_Typ always denotes a class-wide type, since | |
927 | -- there are cases where the controlling type is resolved to a specific | |
928 | -- type (such as for designated types of arguments such as CW'Access). | |
929 | ||
2ea346ac | 930 | elsif Is_Access_Type (Ctrl_Typ) then |
931 | CW_Typ := Class_Wide_Type (Designated_Type (Ctrl_Typ)); | |
7189d17f | 932 | |
ee6ba406 | 933 | else |
2ea346ac | 934 | CW_Typ := Class_Wide_Type (Ctrl_Typ); |
ee6ba406 | 935 | end if; |
936 | ||
bb5dfacc | 937 | Typ := Find_Specific_Type (CW_Typ); |
d62940bf | 938 | |
ee6ba406 | 939 | if not Is_Limited_Type (Typ) then |
940 | Eq_Prim_Op := Find_Prim_Op (Typ, Name_Op_Eq); | |
941 | end if; | |
942 | ||
343d35dc | 943 | -- Dispatching call to C++ primitive. Create a new parameter list |
944 | -- with no tag checks. | |
ee6ba406 | 945 | |
cd534f03 | 946 | New_Params := New_List; |
947 | ||
343d35dc | 948 | if Is_CPP_Class (Typ) then |
ee6ba406 | 949 | Param := First_Actual (Call_Node); |
950 | while Present (Param) loop | |
aad6babd | 951 | Append_To (New_Params, Relocate_Node (Param)); |
ee6ba406 | 952 | Next_Actual (Param); |
953 | end loop; | |
954 | ||
343d35dc | 955 | -- Dispatching call to Ada primitive |
956 | ||
ee6ba406 | 957 | elsif Present (Param_List) then |
cd534f03 | 958 | Apply_Tag_Checks (Call_Node); |
ee6ba406 | 959 | |
ee6ba406 | 960 | Param := First_Actual (Call_Node); |
961 | while Present (Param) loop | |
962 | ||
f365561f | 963 | -- Cases in which we may have generated run-time checks. Note that |
964 | -- we strip any qualification from Param before comparing with the | |
965 | -- already-stripped controlling argument. | |
966 | ||
967 | if Unqualify (Param) = Ctrl_Arg or else Subp = Eq_Prim_Op then | |
9dfe12ae | 968 | Append_To (New_Params, |
969 | Duplicate_Subexpr_Move_Checks (Param)); | |
ee6ba406 | 970 | |
0429d533 | 971 | elsif Nkind (Parent (Param)) /= N_Parameter_Association |
972 | or else not Is_Accessibility_Actual (Parent (Param)) | |
973 | then | |
ee6ba406 | 974 | Append_To (New_Params, Relocate_Node (Param)); |
975 | end if; | |
976 | ||
977 | Next_Actual (Param); | |
978 | end loop; | |
979 | end if; | |
980 | ||
981 | -- Generate the appropriate subprogram pointer type | |
982 | ||
68f95949 | 983 | if Etype (Subp) = Typ then |
ee6ba406 | 984 | Res_Typ := CW_Typ; |
985 | else | |
7189d17f | 986 | Res_Typ := Etype (Subp); |
ee6ba406 | 987 | end if; |
988 | ||
b6b96867 | 989 | Subp_Typ := Create_Itype (E_Subprogram_Type, Call_Node); |
ee6ba406 | 990 | Subp_Ptr_Typ := Create_Itype (E_Access_Subprogram_Type, Call_Node); |
991 | Set_Etype (Subp_Typ, Res_Typ); | |
ee6ba406 | 992 | Set_Returns_By_Ref (Subp_Typ, Returns_By_Ref (Subp)); |
265200d0 | 993 | Set_Convention (Subp_Typ, Convention (Subp)); |
994 | ||
995 | -- Notify gigi that the designated type is a dispatching primitive | |
996 | ||
997 | Set_Is_Dispatch_Table_Entity (Subp_Typ); | |
ee6ba406 | 998 | |
999 | -- Create a new list of parameters which is a copy of the old formal | |
1000 | -- list including the creation of a new set of matching entities. | |
1001 | ||
1002 | declare | |
1003 | Old_Formal : Entity_Id := First_Formal (Subp); | |
1004 | New_Formal : Entity_Id; | |
725a69d2 | 1005 | Extra : Entity_Id := Empty; |
ee6ba406 | 1006 | |
1007 | begin | |
1008 | if Present (Old_Formal) then | |
1009 | New_Formal := New_Copy (Old_Formal); | |
1010 | Set_First_Entity (Subp_Typ, New_Formal); | |
1011 | Param := First_Actual (Call_Node); | |
1012 | ||
1013 | loop | |
1014 | Set_Scope (New_Formal, Subp_Typ); | |
1015 | ||
1016 | -- Change all the controlling argument types to be class-wide | |
7189d17f | 1017 | -- to avoid a recursion in dispatching. |
ee6ba406 | 1018 | |
7189d17f | 1019 | if Is_Controlling_Formal (New_Formal) then |
ee6ba406 | 1020 | Set_Etype (New_Formal, Etype (Param)); |
1021 | end if; | |
1022 | ||
cc60bd16 | 1023 | -- If the type of the formal is an itype, there was code here |
1024 | -- introduced in 1998 in revision 1.46, to create a new itype | |
1025 | -- by copy. This seems useless, and in fact leads to semantic | |
1026 | -- errors when the itype is the completion of a type derived | |
1027 | -- from a private type. | |
ee6ba406 | 1028 | |
1029 | Extra := New_Formal; | |
1030 | Next_Formal (Old_Formal); | |
1031 | exit when No (Old_Formal); | |
1032 | ||
585796c0 | 1033 | Link_Entities (New_Formal, New_Copy (Old_Formal)); |
1034 | Next_Entity (New_Formal); | |
1035 | Next_Actual (Param); | |
ee6ba406 | 1036 | end loop; |
af647dc7 | 1037 | |
585796c0 | 1038 | Unlink_Next_Entity (New_Formal); |
ee6ba406 | 1039 | Set_Last_Entity (Subp_Typ, Extra); |
725a69d2 | 1040 | end if; |
ee6ba406 | 1041 | |
725a69d2 | 1042 | -- Now that the explicit formals have been duplicated, any extra |
1043 | -- formals needed by the subprogram must be created. | |
ee6ba406 | 1044 | |
725a69d2 | 1045 | if Present (Extra) then |
1046 | Set_Extra_Formal (Extra, Empty); | |
ee6ba406 | 1047 | end if; |
725a69d2 | 1048 | |
1049 | Create_Extra_Formals (Subp_Typ); | |
ee6ba406 | 1050 | end; |
1051 | ||
b6b96867 | 1052 | -- Complete description of pointer type, including size information, as |
1053 | -- must be done with itypes to prevent order-of-elaboration anomalies | |
1054 | -- in gigi. | |
1055 | ||
ee6ba406 | 1056 | Set_Etype (Subp_Ptr_Typ, Subp_Ptr_Typ); |
1057 | Set_Directly_Designated_Type (Subp_Ptr_Typ, Subp_Typ); | |
acf97c11 | 1058 | Set_Convention (Subp_Ptr_Typ, Convention (Subp_Typ)); |
b6b96867 | 1059 | Layout_Type (Subp_Ptr_Typ); |
ee6ba406 | 1060 | |
68f95949 | 1061 | -- If the controlling argument is a value of type Ada.Tag or an abstract |
1062 | -- interface class-wide type then use it directly. Otherwise, the tag | |
1063 | -- must be extracted from the controlling object. | |
7189d17f | 1064 | |
2ea346ac | 1065 | if Ctrl_Typ = RTE (RE_Tag) |
68f95949 | 1066 | or else (RTE_Available (RE_Interface_Tag) |
2ea346ac | 1067 | and then Ctrl_Typ = RTE (RE_Interface_Tag)) |
68f95949 | 1068 | then |
1069 | Controlling_Tag := Duplicate_Subexpr (Ctrl_Arg); | |
1070 | ||
343d35dc | 1071 | -- Extract the tag from an unchecked type conversion. Done to avoid |
1072 | -- the expansion of additional code just to obtain the value of such | |
1073 | -- tag because the current management of interface type conversions | |
1074 | -- generates in some cases this unchecked type conversion with the | |
1075 | -- tag of the object (see Expand_Interface_Conversion). | |
1076 | ||
1077 | elsif Nkind (Ctrl_Arg) = N_Unchecked_Type_Conversion | |
1078 | and then | |
1079 | (Etype (Expression (Ctrl_Arg)) = RTE (RE_Tag) | |
1080 | or else | |
1081 | (RTE_Available (RE_Interface_Tag) | |
1082 | and then | |
1083 | Etype (Expression (Ctrl_Arg)) = RTE (RE_Interface_Tag))) | |
1084 | then | |
1085 | Controlling_Tag := Duplicate_Subexpr (Expression (Ctrl_Arg)); | |
1086 | ||
68f95949 | 1087 | -- Ada 2005 (AI-251): Abstract interface class-wide type |
1088 | ||
2ea346ac | 1089 | elsif Is_Interface (Ctrl_Typ) |
1090 | and then Is_Class_Wide_Type (Ctrl_Typ) | |
aad6babd | 1091 | then |
7189d17f | 1092 | Controlling_Tag := Duplicate_Subexpr (Ctrl_Arg); |
1093 | ||
1094 | else | |
1095 | Controlling_Tag := | |
1096 | Make_Selected_Component (Loc, | |
1ea4332a | 1097 | Prefix => Duplicate_Subexpr_Move_Checks (Ctrl_Arg), |
83c6c069 | 1098 | Selector_Name => New_Occurrence_Of (DTC_Entity (Subp), Loc)); |
7189d17f | 1099 | end if; |
1100 | ||
1ea4332a | 1101 | -- Handle dispatching calls to predefined primitives |
ee6ba406 | 1102 | |
af647dc7 | 1103 | if Is_Predefined_Dispatching_Operation (Subp) |
1104 | or else Is_Predefined_Dispatching_Alias (Subp) | |
1105 | then | |
ef40be71 | 1106 | Build_Get_Predefined_Prim_Op_Address (Loc, |
1107 | Tag_Node => Controlling_Tag, | |
1108 | Position => DT_Position (Subp), | |
1109 | New_Node => New_Node); | |
ee6ba406 | 1110 | |
343d35dc | 1111 | -- Handle dispatching calls to user-defined primitives |
68f95949 | 1112 | |
1113 | else | |
ef40be71 | 1114 | Build_Get_Prim_Op_Address (Loc, |
23197014 | 1115 | Typ => Underlying_Type (Find_Dispatching_Type (Subp)), |
ef40be71 | 1116 | Tag_Node => Controlling_Tag, |
1117 | Position => DT_Position (Subp), | |
1118 | New_Node => New_Node); | |
68f95949 | 1119 | end if; |
ee6ba406 | 1120 | |
ef40be71 | 1121 | New_Call_Name := |
1122 | Unchecked_Convert_To (Subp_Ptr_Typ, New_Node); | |
1123 | ||
5a44b136 | 1124 | -- Generate the SCIL node for this dispatching call. Done now because |
1125 | -- attribute SCIL_Controlling_Tag must be set after the new call name | |
1126 | -- is built to reference the nodes that will see the SCIL backend | |
1127 | -- (because Build_Get_Prim_Op_Address generates an unchecked type | |
1128 | -- conversion which relocates the controlling tag node). | |
ee6ba406 | 1129 | |
ef40be71 | 1130 | if Generate_SCIL then |
5a44b136 | 1131 | SCIL_Node := Make_SCIL_Dispatching_Call (Sloc (Call_Node)); |
1132 | Set_SCIL_Entity (SCIL_Node, Typ); | |
1133 | Set_SCIL_Target_Prim (SCIL_Node, Subp); | |
ef40be71 | 1134 | |
1135 | -- Common case: the controlling tag is the tag of an object | |
1136 | -- (for example, obj.tag) | |
1137 | ||
1138 | if Nkind (Controlling_Tag) = N_Selected_Component then | |
1139 | Set_SCIL_Controlling_Tag (SCIL_Node, Controlling_Tag); | |
1140 | ||
1141 | -- Handle renaming of selected component | |
1142 | ||
1143 | elsif Nkind (Controlling_Tag) = N_Identifier | |
1ea4332a | 1144 | and then Nkind (Parent (Entity (Controlling_Tag))) = |
1145 | N_Object_Renaming_Declaration | |
1146 | and then Nkind (Name (Parent (Entity (Controlling_Tag)))) = | |
1147 | N_Selected_Component | |
ef40be71 | 1148 | then |
1149 | Set_SCIL_Controlling_Tag (SCIL_Node, | |
1150 | Name (Parent (Entity (Controlling_Tag)))); | |
1151 | ||
1152 | -- If the controlling tag is an identifier, the SCIL node references | |
1153 | -- the corresponding object or parameter declaration | |
1154 | ||
1155 | elsif Nkind (Controlling_Tag) = N_Identifier | |
1156 | and then Nkind_In (Parent (Entity (Controlling_Tag)), | |
1ea4332a | 1157 | N_Object_Declaration, |
1158 | N_Parameter_Specification) | |
ef40be71 | 1159 | then |
1160 | Set_SCIL_Controlling_Tag (SCIL_Node, | |
1161 | Parent (Entity (Controlling_Tag))); | |
1162 | ||
1163 | -- If the controlling tag is a dereference, the SCIL node references | |
1164 | -- the corresponding object or parameter declaration | |
1165 | ||
1166 | elsif Nkind (Controlling_Tag) = N_Explicit_Dereference | |
1167 | and then Nkind (Prefix (Controlling_Tag)) = N_Identifier | |
1168 | and then Nkind_In (Parent (Entity (Prefix (Controlling_Tag))), | |
1ea4332a | 1169 | N_Object_Declaration, |
1170 | N_Parameter_Specification) | |
ef40be71 | 1171 | then |
1172 | Set_SCIL_Controlling_Tag (SCIL_Node, | |
1173 | Parent (Entity (Prefix (Controlling_Tag)))); | |
1174 | ||
1175 | -- For a direct reference of the tag of the type the SCIL node | |
6fb3c314 | 1176 | -- references the internal object declaration containing the tag |
ef40be71 | 1177 | -- of the type. |
1178 | ||
1179 | elsif Nkind (Controlling_Tag) = N_Attribute_Reference | |
1180 | and then Attribute_Name (Controlling_Tag) = Name_Tag | |
1181 | then | |
1182 | Set_SCIL_Controlling_Tag (SCIL_Node, | |
1183 | Parent | |
1ea4332a | 1184 | (Node |
1185 | (First_Elmt | |
1186 | (Access_Disp_Table (Entity (Prefix (Controlling_Tag))))))); | |
ef40be71 | 1187 | |
1188 | -- Interfaces are not supported. For now we leave the SCIL node | |
1189 | -- decorated with the Controlling_Tag. More work needed here??? | |
1190 | ||
1191 | elsif Is_Interface (Etype (Controlling_Tag)) then | |
1192 | Set_SCIL_Controlling_Tag (SCIL_Node, Controlling_Tag); | |
1193 | ||
1194 | else | |
1195 | pragma Assert (False); | |
1196 | null; | |
1197 | end if; | |
1198 | end if; | |
1199 | ||
1200 | if Nkind (Call_Node) = N_Function_Call then | |
725a69d2 | 1201 | New_Call := |
1202 | Make_Function_Call (Loc, | |
1ea4332a | 1203 | Name => New_Call_Name, |
725a69d2 | 1204 | Parameter_Associations => New_Params); |
ee6ba406 | 1205 | |
725a69d2 | 1206 | -- If this is a dispatching "=", we must first compare the tags so |
1207 | -- we generate: x.tag = y.tag and then x = y | |
ee6ba406 | 1208 | |
725a69d2 | 1209 | if Subp = Eq_Prim_Op then |
1210 | Param := First_Actual (Call_Node); | |
aad6babd | 1211 | New_Call := |
725a69d2 | 1212 | Make_And_Then (Loc, |
1213 | Left_Opnd => | |
1214 | Make_Op_Eq (Loc, | |
1215 | Left_Opnd => | |
1216 | Make_Selected_Component (Loc, | |
1ea4332a | 1217 | Prefix => New_Value (Param), |
725a69d2 | 1218 | Selector_Name => |
83c6c069 | 1219 | New_Occurrence_Of (First_Tag_Component (Typ), |
725a69d2 | 1220 | Loc)), |
ee6ba406 | 1221 | |
725a69d2 | 1222 | Right_Opnd => |
1223 | Make_Selected_Component (Loc, | |
1ea4332a | 1224 | Prefix => |
725a69d2 | 1225 | Unchecked_Convert_To (Typ, |
1226 | New_Value (Next_Actual (Param))), | |
1227 | Selector_Name => | |
83c6c069 | 1228 | New_Occurrence_Of |
1ea4332a | 1229 | (First_Tag_Component (Typ), Loc))), |
725a69d2 | 1230 | Right_Opnd => New_Call); |
5a44b136 | 1231 | |
1232 | SCIL_Related_Node := Right_Opnd (New_Call); | |
ee6ba406 | 1233 | end if; |
1234 | ||
1235 | else | |
1236 | New_Call := | |
1237 | Make_Procedure_Call_Statement (Loc, | |
1ea4332a | 1238 | Name => New_Call_Name, |
ee6ba406 | 1239 | Parameter_Associations => New_Params); |
1240 | end if; | |
1241 | ||
e00e091c | 1242 | -- Register the dispatching call in the call graph nodes table |
1243 | ||
1244 | Register_CG_Node (Call_Node); | |
1245 | ||
ee6ba406 | 1246 | Rewrite (Call_Node, New_Call); |
725a69d2 | 1247 | |
5a44b136 | 1248 | -- Associate the SCIL node of this dispatching call |
1249 | ||
1250 | if Generate_SCIL then | |
1251 | Set_SCIL_Node (SCIL_Related_Node, SCIL_Node); | |
1252 | end if; | |
1253 | ||
02a2406d | 1254 | -- Suppress all checks during the analysis of the expanded code to avoid |
1255 | -- the generation of spurious warnings under ZFP run-time. | |
725a69d2 | 1256 | |
1257 | Analyze_And_Resolve (Call_Node, Call_Typ, Suppress => All_Checks); | |
7189d17f | 1258 | end Expand_Dispatching_Call; |
ee6ba406 | 1259 | |
aad6babd | 1260 | --------------------------------- |
1261 | -- Expand_Interface_Conversion -- | |
1262 | --------------------------------- | |
1263 | ||
61ce7f9f | 1264 | procedure Expand_Interface_Conversion (N : Node_Id) is |
1265 | function Underlying_Record_Type (Typ : Entity_Id) return Entity_Id; | |
e3052f62 | 1266 | -- Return the underlying record type of Typ |
aad6babd | 1267 | |
61ce7f9f | 1268 | ---------------------------- |
1269 | -- Underlying_Record_Type -- | |
1270 | ---------------------------- | |
aad6babd | 1271 | |
61ce7f9f | 1272 | function Underlying_Record_Type (Typ : Entity_Id) return Entity_Id is |
1273 | E : Entity_Id := Typ; | |
aad6babd | 1274 | |
61ce7f9f | 1275 | begin |
8b3a98b2 | 1276 | -- Handle access types |
aad6babd | 1277 | |
61ce7f9f | 1278 | if Is_Access_Type (E) then |
8b3a98b2 | 1279 | E := Directly_Designated_Type (E); |
61ce7f9f | 1280 | end if; |
aad6babd | 1281 | |
61ce7f9f | 1282 | -- Handle class-wide types. This conversion can appear explicitly in |
1283 | -- the source code. Example: I'Class (Obj) | |
aad6babd | 1284 | |
61ce7f9f | 1285 | if Is_Class_Wide_Type (E) then |
1286 | E := Root_Type (E); | |
1287 | end if; | |
d62940bf | 1288 | |
61ce7f9f | 1289 | -- If the target type is a tagged synchronized type, the dispatch |
1290 | -- table info is in the corresponding record type. | |
79a72728 | 1291 | |
61ce7f9f | 1292 | if Is_Concurrent_Type (E) then |
1293 | E := Corresponding_Record_Type (E); | |
1294 | end if; | |
79a72728 | 1295 | |
61ce7f9f | 1296 | -- Handle private types |
1297 | ||
1298 | E := Underlying_Type (E); | |
23197014 | 1299 | |
61ce7f9f | 1300 | -- Handle subtypes |
23197014 | 1301 | |
61ce7f9f | 1302 | return Base_Type (E); |
1303 | end Underlying_Record_Type; | |
1304 | ||
1305 | -- Local variables | |
1306 | ||
1307 | Loc : constant Source_Ptr := Sloc (N); | |
1308 | Etyp : constant Entity_Id := Etype (N); | |
1309 | Operand : constant Node_Id := Expression (N); | |
1310 | Operand_Typ : Entity_Id := Etype (Operand); | |
1311 | Func : Node_Id; | |
1312 | Iface_Typ : constant Entity_Id := Underlying_Record_Type (Etype (N)); | |
1313 | Iface_Tag : Entity_Id; | |
1314 | Is_Static : Boolean; | |
1315 | ||
1316 | -- Start of processing for Expand_Interface_Conversion | |
1317 | ||
1318 | begin | |
a17cc77d | 1319 | -- Freeze the entity associated with the target interface to have |
1320 | -- available the attribute Access_Disp_Table. | |
1321 | ||
1322 | Freeze_Before (N, Iface_Typ); | |
1323 | ||
61ce7f9f | 1324 | -- Ada 2005 (AI-345): Handle synchronized interface type derivations |
1325 | ||
1326 | if Is_Concurrent_Type (Operand_Typ) then | |
1327 | Operand_Typ := Base_Type (Corresponding_Record_Type (Operand_Typ)); | |
1328 | end if; | |
1329 | ||
7e0d01bf | 1330 | -- No displacement of the pointer to the object needed when the type of |
1331 | -- the operand is not an interface type and the interface is one of | |
1332 | -- its parent types (since they share the primary dispatch table). | |
1333 | ||
1334 | declare | |
1335 | Opnd : Entity_Id := Operand_Typ; | |
1336 | ||
1337 | begin | |
1338 | if Is_Access_Type (Opnd) then | |
1339 | Opnd := Designated_Type (Opnd); | |
1340 | end if; | |
1341 | ||
1342 | if not Is_Interface (Opnd) | |
1343 | and then Is_Ancestor (Iface_Typ, Opnd, Use_Full_View => True) | |
1344 | then | |
1345 | return; | |
1346 | end if; | |
1347 | end; | |
1348 | ||
61ce7f9f | 1349 | -- Evaluate if we can statically displace the pointer to the object |
1350 | ||
1351 | declare | |
1352 | Opnd_Typ : constant Node_Id := Underlying_Record_Type (Operand_Typ); | |
1353 | ||
1354 | begin | |
1355 | Is_Static := | |
1356 | not Is_Interface (Opnd_Typ) | |
1357 | and then Interface_Present_In_Ancestor | |
1358 | (Typ => Opnd_Typ, | |
1359 | Iface => Iface_Typ) | |
1360 | and then (Etype (Opnd_Typ) = Opnd_Typ | |
1361 | or else not | |
1362 | Is_Variable_Size_Record (Etype (Opnd_Typ))); | |
1363 | end; | |
aad6babd | 1364 | |
662256db | 1365 | if not Tagged_Type_Expansion then |
725a69d2 | 1366 | return; |
aa0a69ab | 1367 | |
62c62e4b | 1368 | -- A static conversion to an interface type that is not class-wide is |
aa0a69ab | 1369 | -- curious but legal if the interface operation is a null procedure. |
1370 | -- If the operation is abstract it will be rejected later. | |
1371 | ||
1372 | elsif Is_Static | |
1373 | and then Is_Interface (Etype (N)) | |
1374 | and then not Is_Class_Wide_Type (Etype (N)) | |
1375 | and then Comes_From_Source (N) | |
1376 | then | |
1377 | Rewrite (N, Unchecked_Convert_To (Etype (N), N)); | |
1378 | Analyze (N); | |
1379 | return; | |
725a69d2 | 1380 | end if; |
1381 | ||
952af0b9 | 1382 | if not Is_Static then |
68f95949 | 1383 | |
62c62e4b | 1384 | -- Give error if configurable run-time and Displace not available |
68f95949 | 1385 | |
1386 | if not RTE_Available (RE_Displace) then | |
cc60bd16 | 1387 | Error_Msg_CRT ("dynamic interface conversion", N); |
68f95949 | 1388 | return; |
1389 | end if; | |
1390 | ||
725a69d2 | 1391 | -- Handle conversion of access-to-class-wide interface types. Target |
1392 | -- can be an access to an object or an access to another class-wide | |
1393 | -- interface (see -1- and -2- in the following example): | |
af647dc7 | 1394 | |
1395 | -- type Iface1_Ref is access all Iface1'Class; | |
1396 | -- type Iface2_Ref is access all Iface1'Class; | |
1397 | ||
1398 | -- Acc1 : Iface1_Ref := new ... | |
1399 | -- Obj : Obj_Ref := Obj_Ref (Acc); -- 1 | |
1400 | -- Acc2 : Iface2_Ref := Iface2_Ref (Acc); -- 2 | |
1401 | ||
1402 | if Is_Access_Type (Operand_Typ) then | |
af647dc7 | 1403 | Rewrite (N, |
1404 | Unchecked_Convert_To (Etype (N), | |
1405 | Make_Function_Call (Loc, | |
83c6c069 | 1406 | Name => New_Occurrence_Of (RTE (RE_Displace), Loc), |
af647dc7 | 1407 | Parameter_Associations => New_List ( |
1408 | ||
1409 | Unchecked_Convert_To (RTE (RE_Address), | |
1410 | Relocate_Node (Expression (N))), | |
1411 | ||
1412 | New_Occurrence_Of | |
1413 | (Node (First_Elmt (Access_Disp_Table (Iface_Typ))), | |
1414 | Loc))))); | |
1415 | ||
1416 | Analyze (N); | |
1417 | return; | |
1418 | end if; | |
1419 | ||
952af0b9 | 1420 | Rewrite (N, |
1421 | Make_Function_Call (Loc, | |
83c6c069 | 1422 | Name => New_Occurrence_Of (RTE (RE_Displace), Loc), |
952af0b9 | 1423 | Parameter_Associations => New_List ( |
1424 | Make_Attribute_Reference (Loc, | |
1425 | Prefix => Relocate_Node (Expression (N)), | |
1426 | Attribute_Name => Name_Address), | |
af647dc7 | 1427 | |
952af0b9 | 1428 | New_Occurrence_Of |
1429 | (Node (First_Elmt (Access_Disp_Table (Iface_Typ))), | |
1430 | Loc)))); | |
1431 | ||
1432 | Analyze (N); | |
1433 | ||
02a2406d | 1434 | -- If target is a class-wide interface, change the type of the data |
1435 | -- returned by IW_Convert to indicate this is a dispatching call. | |
952af0b9 | 1436 | |
17e14451 | 1437 | declare |
1438 | New_Itype : Entity_Id; | |
952af0b9 | 1439 | |
17e14451 | 1440 | begin |
1441 | New_Itype := Create_Itype (E_Anonymous_Access_Type, N); | |
cc60bd16 | 1442 | Set_Etype (New_Itype, New_Itype); |
17e14451 | 1443 | Set_Directly_Designated_Type (New_Itype, Etyp); |
952af0b9 | 1444 | |
17e14451 | 1445 | Rewrite (N, |
1446 | Make_Explicit_Dereference (Loc, | |
1447 | Prefix => | |
1448 | Unchecked_Convert_To (New_Itype, Relocate_Node (N)))); | |
1449 | Analyze (N); | |
1450 | Freeze_Itype (New_Itype, N); | |
1451 | ||
1452 | return; | |
1453 | end; | |
952af0b9 | 1454 | end if; |
1455 | ||
d62940bf | 1456 | Iface_Tag := Find_Interface_Tag (Operand_Typ, Iface_Typ); |
aad6babd | 1457 | pragma Assert (Iface_Tag /= Empty); |
1458 | ||
d62940bf | 1459 | -- Keep separate access types to interfaces because one internal |
f235fede | 1460 | -- function is used to handle the null value (see following comments) |
d62940bf | 1461 | |
1462 | if not Is_Access_Type (Etype (N)) then | |
f235fede | 1463 | |
02a2406d | 1464 | -- Statically displace the pointer to the object to reference the |
1465 | -- component containing the secondary dispatch table. | |
f235fede | 1466 | |
d62940bf | 1467 | Rewrite (N, |
f235fede | 1468 | Convert_Tag_To_Interface (Class_Wide_Type (Iface_Typ), |
d62940bf | 1469 | Make_Selected_Component (Loc, |
1470 | Prefix => Relocate_Node (Expression (N)), | |
f235fede | 1471 | Selector_Name => New_Occurrence_Of (Iface_Tag, Loc)))); |
d62940bf | 1472 | |
1473 | else | |
39a0c1d3 | 1474 | -- Build internal function to handle the case in which the actual is |
1475 | -- null. If the actual is null returns null because no displacement | |
1476 | -- is required; otherwise performs a type conversion that will be | |
1477 | -- expanded in the code that returns the value of the displaced | |
1478 | -- actual. That is: | |
d62940bf | 1479 | |
af647dc7 | 1480 | -- function Func (O : Address) return Iface_Typ is |
17e14451 | 1481 | -- type Op_Typ is access all Operand_Typ; |
1482 | -- Aux : Op_Typ := To_Op_Typ (O); | |
d62940bf | 1483 | -- begin |
af647dc7 | 1484 | -- if O = Null_Address then |
d62940bf | 1485 | -- return null; |
1486 | -- else | |
17e14451 | 1487 | -- return Iface_Typ!(Aux.Iface_Tag'Address); |
d62940bf | 1488 | -- end if; |
1489 | -- end Func; | |
1490 | ||
af647dc7 | 1491 | declare |
17e14451 | 1492 | Desig_Typ : Entity_Id; |
1493 | Fent : Entity_Id; | |
1494 | New_Typ_Decl : Node_Id; | |
17e14451 | 1495 | Stats : List_Id; |
1496 | ||
af647dc7 | 1497 | begin |
1498 | Desig_Typ := Etype (Expression (N)); | |
d62940bf | 1499 | |
af647dc7 | 1500 | if Is_Access_Type (Desig_Typ) then |
865909d3 | 1501 | Desig_Typ := |
1502 | Available_View (Directly_Designated_Type (Desig_Typ)); | |
af647dc7 | 1503 | end if; |
d62940bf | 1504 | |
e7e688dd | 1505 | if Is_Concurrent_Type (Desig_Typ) then |
1506 | Desig_Typ := Base_Type (Corresponding_Record_Type (Desig_Typ)); | |
1507 | end if; | |
1508 | ||
17e14451 | 1509 | New_Typ_Decl := |
1510 | Make_Full_Type_Declaration (Loc, | |
ec97ce79 | 1511 | Defining_Identifier => Make_Temporary (Loc, 'T'), |
17e14451 | 1512 | Type_Definition => |
1513 | Make_Access_To_Object_Definition (Loc, | |
1514 | All_Present => True, | |
1515 | Null_Exclusion_Present => False, | |
1516 | Constant_Present => False, | |
1517 | Subtype_Indication => | |
83c6c069 | 1518 | New_Occurrence_Of (Desig_Typ, Loc))); |
d62940bf | 1519 | |
725a69d2 | 1520 | Stats := New_List ( |
17e14451 | 1521 | Make_Simple_Return_Statement (Loc, |
1522 | Unchecked_Convert_To (Etype (N), | |
1523 | Make_Attribute_Reference (Loc, | |
02a2406d | 1524 | Prefix => |
17e14451 | 1525 | Make_Selected_Component (Loc, |
02a2406d | 1526 | Prefix => |
e7e688dd | 1527 | Unchecked_Convert_To |
1528 | (Defining_Identifier (New_Typ_Decl), | |
1529 | Make_Identifier (Loc, Name_uO)), | |
17e14451 | 1530 | Selector_Name => |
1531 | New_Occurrence_Of (Iface_Tag, Loc)), | |
1532 | Attribute_Name => Name_Address)))); | |
725a69d2 | 1533 | |
17e14451 | 1534 | -- If the type is null-excluding, no need for the null branch. |
1535 | -- Otherwise we need to check for it and return null. | |
1536 | ||
1537 | if not Can_Never_Be_Null (Etype (N)) then | |
1538 | Stats := New_List ( | |
1539 | Make_If_Statement (Loc, | |
1540 | Condition => | |
1541 | Make_Op_Eq (Loc, | |
1542 | Left_Opnd => Make_Identifier (Loc, Name_uO), | |
83c6c069 | 1543 | Right_Opnd => New_Occurrence_Of |
17e14451 | 1544 | (RTE (RE_Null_Address), Loc)), |
1545 | ||
1546 | Then_Statements => New_List ( | |
02a2406d | 1547 | Make_Simple_Return_Statement (Loc, Make_Null (Loc))), |
17e14451 | 1548 | Else_Statements => Stats)); |
1549 | end if; | |
d62940bf | 1550 | |
ec97ce79 | 1551 | Fent := Make_Temporary (Loc, 'F'); |
17e14451 | 1552 | Func := |
1553 | Make_Subprogram_Body (Loc, | |
1554 | Specification => | |
1555 | Make_Function_Specification (Loc, | |
1556 | Defining_Unit_Name => Fent, | |
d62940bf | 1557 | |
17e14451 | 1558 | Parameter_Specifications => New_List ( |
1559 | Make_Parameter_Specification (Loc, | |
1560 | Defining_Identifier => | |
1561 | Make_Defining_Identifier (Loc, Name_uO), | |
1562 | Parameter_Type => | |
83c6c069 | 1563 | New_Occurrence_Of (RTE (RE_Address), Loc))), |
d62940bf | 1564 | |
17e14451 | 1565 | Result_Definition => |
83c6c069 | 1566 | New_Occurrence_Of (Etype (N), Loc)), |
d62940bf | 1567 | |
e7e688dd | 1568 | Declarations => New_List (New_Typ_Decl), |
d62940bf | 1569 | |
17e14451 | 1570 | Handled_Statement_Sequence => |
1571 | Make_Handled_Sequence_Of_Statements (Loc, Stats)); | |
d62940bf | 1572 | |
17e14451 | 1573 | -- Place function body before the expression containing the |
1574 | -- conversion. We suppress all checks because the body of the | |
1575 | -- internally generated function already takes care of the case | |
1576 | -- in which the actual is null; therefore there is no need to | |
1577 | -- double check that the pointer is not null when the program | |
1578 | -- executes the alternative that performs the type conversion). | |
af647dc7 | 1579 | |
17e14451 | 1580 | Insert_Action (N, Func, Suppress => All_Checks); |
af647dc7 | 1581 | |
17e14451 | 1582 | if Is_Access_Type (Etype (Expression (N))) then |
af647dc7 | 1583 | |
e7e688dd | 1584 | -- Generate: Func (Address!(Expression)) |
af647dc7 | 1585 | |
17e14451 | 1586 | Rewrite (N, |
1587 | Make_Function_Call (Loc, | |
b29768cb | 1588 | Name => New_Occurrence_Of (Fent, Loc), |
17e14451 | 1589 | Parameter_Associations => New_List ( |
e7e688dd | 1590 | Unchecked_Convert_To (RTE (RE_Address), |
1591 | Relocate_Node (Expression (N)))))); | |
17e14451 | 1592 | |
1593 | else | |
e7e688dd | 1594 | -- Generate: Func (Operand_Typ!(Expression)'Address) |
17e14451 | 1595 | |
1596 | Rewrite (N, | |
1597 | Make_Function_Call (Loc, | |
b29768cb | 1598 | Name => New_Occurrence_Of (Fent, Loc), |
17e14451 | 1599 | Parameter_Associations => New_List ( |
1600 | Make_Attribute_Reference (Loc, | |
1601 | Prefix => Unchecked_Convert_To (Operand_Typ, | |
1602 | Relocate_Node (Expression (N))), | |
1603 | Attribute_Name => Name_Address)))); | |
1604 | end if; | |
1605 | end; | |
d62940bf | 1606 | end if; |
aad6babd | 1607 | |
1608 | Analyze (N); | |
1609 | end Expand_Interface_Conversion; | |
1610 | ||
1611 | ------------------------------ | |
1612 | -- Expand_Interface_Actuals -- | |
1613 | ------------------------------ | |
1614 | ||
1615 | procedure Expand_Interface_Actuals (Call_Node : Node_Id) is | |
aad6babd | 1616 | Actual : Node_Id; |
d62940bf | 1617 | Actual_Dup : Node_Id; |
aad6babd | 1618 | Actual_Typ : Entity_Id; |
d62940bf | 1619 | Anon : Entity_Id; |
aad6babd | 1620 | Conversion : Node_Id; |
1621 | Formal : Entity_Id; | |
1622 | Formal_Typ : Entity_Id; | |
1623 | Subp : Entity_Id; | |
95c577d7 | 1624 | Formal_DDT : Entity_Id := Empty; -- initialize to prevent warning |
1625 | Actual_DDT : Entity_Id := Empty; -- initialize to prevent warning | |
aad6babd | 1626 | |
1627 | begin | |
1628 | -- This subprogram is called directly from the semantics, so we need a | |
1629 | -- check to see whether expansion is active before proceeding. | |
1630 | ||
1631 | if not Expander_Active then | |
1632 | return; | |
1633 | end if; | |
1634 | ||
1635 | -- Call using access to subprogram with explicit dereference | |
1636 | ||
1637 | if Nkind (Name (Call_Node)) = N_Explicit_Dereference then | |
1638 | Subp := Etype (Name (Call_Node)); | |
1639 | ||
4e5db562 | 1640 | -- Call using selected component |
1641 | ||
1642 | elsif Nkind (Name (Call_Node)) = N_Selected_Component then | |
1643 | Subp := Entity (Selector_Name (Name (Call_Node))); | |
1644 | ||
1645 | -- Call using direct name | |
aad6babd | 1646 | |
1647 | else | |
1648 | Subp := Entity (Name (Call_Node)); | |
1649 | end if; | |
1650 | ||
725a69d2 | 1651 | -- Ada 2005 (AI-251): Look for interface type formals to force "this" |
1652 | -- displacement | |
1653 | ||
aad6babd | 1654 | Formal := First_Formal (Subp); |
1655 | Actual := First_Actual (Call_Node); | |
aad6babd | 1656 | while Present (Formal) loop |
725a69d2 | 1657 | Formal_Typ := Etype (Formal); |
d62940bf | 1658 | |
1659 | if Ekind (Formal_Typ) = E_Record_Type_With_Private then | |
1660 | Formal_Typ := Full_View (Formal_Typ); | |
1661 | end if; | |
1662 | ||
1663 | if Is_Access_Type (Formal_Typ) then | |
1664 | Formal_DDT := Directly_Designated_Type (Formal_Typ); | |
1665 | end if; | |
1666 | ||
aad6babd | 1667 | Actual_Typ := Etype (Actual); |
1668 | ||
d62940bf | 1669 | if Is_Access_Type (Actual_Typ) then |
1670 | Actual_DDT := Directly_Designated_Type (Actual_Typ); | |
1671 | end if; | |
1672 | ||
725a69d2 | 1673 | if Is_Interface (Formal_Typ) |
1674 | and then Is_Class_Wide_Type (Formal_Typ) | |
1675 | then | |
d62940bf | 1676 | -- No need to displace the pointer if the type of the actual |
1d00a8ce | 1677 | -- coincides with the type of the formal. |
aad6babd | 1678 | |
725a69d2 | 1679 | if Actual_Typ = Formal_Typ then |
d62940bf | 1680 | null; |
1681 | ||
02a2406d | 1682 | -- No need to displace the pointer if the interface type is a |
1683 | -- parent of the type of the actual because in this case the | |
725a69d2 | 1684 | -- interface primitives are located in the primary dispatch table. |
aad6babd | 1685 | |
cb4af01d | 1686 | elsif Is_Ancestor (Formal_Typ, Actual_Typ, |
1687 | Use_Full_View => True) | |
1688 | then | |
d62940bf | 1689 | null; |
1690 | ||
02a2406d | 1691 | -- Implicit conversion to the class-wide formal type to force the |
1692 | -- displacement of the pointer. | |
725a69d2 | 1693 | |
d62940bf | 1694 | else |
8a8d9086 | 1695 | -- Normally, expansion of actuals for calls to build-in-place |
1696 | -- functions happens as part of Expand_Actuals, but in this | |
1697 | -- case the call will be wrapped in a conversion and soon after | |
1698 | -- expanded further to handle the displacement for a class-wide | |
1699 | -- interface conversion, so if this is a BIP call then we need | |
1700 | -- to handle it now. | |
1701 | ||
cd24e497 | 1702 | if Is_Build_In_Place_Function_Call (Actual) then |
8a8d9086 | 1703 | Make_Build_In_Place_Call_In_Anonymous_Context (Actual); |
1704 | end if; | |
1705 | ||
d62940bf | 1706 | Conversion := Convert_To (Formal_Typ, Relocate_Node (Actual)); |
725a69d2 | 1707 | Rewrite (Actual, Conversion); |
d62940bf | 1708 | Analyze_And_Resolve (Actual, Formal_Typ); |
1709 | end if; | |
aad6babd | 1710 | |
725a69d2 | 1711 | -- Access to class-wide interface type |
aad6babd | 1712 | |
1713 | elsif Is_Access_Type (Formal_Typ) | |
725a69d2 | 1714 | and then Is_Interface (Formal_DDT) |
1715 | and then Is_Class_Wide_Type (Formal_DDT) | |
aad6babd | 1716 | and then Interface_Present_In_Ancestor |
d62940bf | 1717 | (Typ => Actual_DDT, |
1718 | Iface => Etype (Formal_DDT)) | |
aad6babd | 1719 | then |
725a69d2 | 1720 | -- Handle attributes 'Access and 'Unchecked_Access |
1721 | ||
aad6babd | 1722 | if Nkind (Actual) = N_Attribute_Reference |
1723 | and then | |
1724 | (Attribute_Name (Actual) = Name_Access | |
1725 | or else Attribute_Name (Actual) = Name_Unchecked_Access) | |
1726 | then | |
5e82d8fe | 1727 | -- This case must have been handled by the analysis and |
1728 | -- expansion of 'Access. The only exception is when types | |
1729 | -- match and no further expansion is required. | |
aad6babd | 1730 | |
5e82d8fe | 1731 | pragma Assert (Base_Type (Etype (Prefix (Actual))) |
1732 | = Base_Type (Formal_DDT)); | |
1733 | null; | |
aad6babd | 1734 | |
725a69d2 | 1735 | -- No need to displace the pointer if the type of the actual |
1736 | -- coincides with the type of the formal. | |
d62940bf | 1737 | |
725a69d2 | 1738 | elsif Actual_DDT = Formal_DDT then |
d62940bf | 1739 | null; |
1740 | ||
725a69d2 | 1741 | -- No need to displace the pointer if the interface type is |
1742 | -- a parent of the type of the actual because in this case the | |
1743 | -- interface primitives are located in the primary dispatch table. | |
d62940bf | 1744 | |
cb4af01d | 1745 | elsif Is_Ancestor (Formal_DDT, Actual_DDT, |
1746 | Use_Full_View => True) | |
1747 | then | |
d62940bf | 1748 | null; |
1749 | ||
aad6babd | 1750 | else |
d62940bf | 1751 | Actual_Dup := Relocate_Node (Actual); |
1752 | ||
4aa270d8 | 1753 | if From_Limited_With (Actual_Typ) then |
d62940bf | 1754 | |
9a666241 | 1755 | -- If the type of the actual parameter comes from a limited |
1756 | -- with_clause and the nonlimited view is already available, | |
1757 | -- we replace the anonymous access type by a duplicate | |
1758 | -- declaration whose designated type is the nonlimited view. | |
d62940bf | 1759 | |
40993cdb | 1760 | if Has_Non_Limited_View (Actual_DDT) then |
d62940bf | 1761 | Anon := New_Copy (Actual_Typ); |
1762 | ||
1763 | if Is_Itype (Anon) then | |
1764 | Set_Scope (Anon, Current_Scope); | |
1765 | end if; | |
1766 | ||
542823a9 | 1767 | Set_Directly_Designated_Type |
1768 | (Anon, Non_Limited_View (Actual_DDT)); | |
d62940bf | 1769 | Set_Etype (Actual_Dup, Anon); |
d62940bf | 1770 | end if; |
1771 | end if; | |
1772 | ||
1773 | Conversion := Convert_To (Formal_Typ, Actual_Dup); | |
1774 | Rewrite (Actual, Conversion); | |
aad6babd | 1775 | Analyze_And_Resolve (Actual, Formal_Typ); |
1776 | end if; | |
1777 | end if; | |
1778 | ||
1779 | Next_Actual (Actual); | |
1780 | Next_Formal (Formal); | |
1781 | end loop; | |
1782 | end Expand_Interface_Actuals; | |
1783 | ||
1784 | ---------------------------- | |
1785 | -- Expand_Interface_Thunk -- | |
1786 | ---------------------------- | |
1787 | ||
725a69d2 | 1788 | procedure Expand_Interface_Thunk |
17e14451 | 1789 | (Prim : Node_Id; |
1790 | Thunk_Id : out Entity_Id; | |
1791 | Thunk_Code : out Node_Id) | |
aad6babd | 1792 | is |
e8376947 | 1793 | Loc : constant Source_Ptr := Sloc (Prim); |
1794 | Actuals : constant List_Id := New_List; | |
1795 | Decl : constant List_Id := New_List; | |
1796 | Formals : constant List_Id := New_List; | |
1797 | Target : constant Entity_Id := Ultimate_Alias (Prim); | |
725a69d2 | 1798 | |
c6431a40 | 1799 | Decl_1 : Node_Id; |
1800 | Decl_2 : Node_Id; | |
1801 | Expr : Node_Id; | |
1802 | Formal : Node_Id; | |
1803 | Ftyp : Entity_Id; | |
95c577d7 | 1804 | Iface_Formal : Node_Id := Empty; -- initialize to prevent warning |
c6431a40 | 1805 | New_Arg : Node_Id; |
1806 | Offset_To_Top : Node_Id; | |
1807 | Target_Formal : Entity_Id; | |
aad6babd | 1808 | |
1809 | begin | |
725a69d2 | 1810 | Thunk_Id := Empty; |
1811 | Thunk_Code := Empty; | |
1812 | ||
3f8cf2d2 | 1813 | -- No thunk needed if the primitive has been eliminated |
1814 | ||
1815 | if Is_Eliminated (Ultimate_Alias (Prim)) then | |
1816 | return; | |
1817 | ||
e8376947 | 1818 | -- In case of primitives that are functions without formals and a |
1819 | -- controlling result there is no need to build the thunk. | |
725a69d2 | 1820 | |
3f8cf2d2 | 1821 | elsif not Present (First_Formal (Target)) then |
725a69d2 | 1822 | pragma Assert (Ekind (Target) = E_Function |
1823 | and then Has_Controlling_Result (Target)); | |
1824 | return; | |
1825 | end if; | |
1826 | ||
04c6d723 | 1827 | -- Duplicate the formals of the Target primitive. In the thunk, the type |
1828 | -- of the controlling formal is the covered interface type (instead of | |
1829 | -- the target tagged type). Done to avoid problems with discriminated | |
1830 | -- tagged types because, if the controlling type has discriminants with | |
e8376947 | 1831 | -- default values, then the type conversions done inside the body of |
1832 | -- the thunk (after the displacement of the pointer to the base of the | |
04c6d723 | 1833 | -- actual object) generate code that modify its contents. |
1834 | ||
1835 | -- Note: This special management is not done for predefined primitives | |
1836 | -- because??? | |
1837 | ||
1838 | if not Is_Predefined_Dispatching_Operation (Prim) then | |
1839 | Iface_Formal := First_Formal (Interface_Alias (Prim)); | |
1840 | end if; | |
aad6babd | 1841 | |
d62940bf | 1842 | Formal := First_Formal (Target); |
aad6babd | 1843 | while Present (Formal) loop |
04c6d723 | 1844 | Ftyp := Etype (Formal); |
1845 | ||
1846 | -- Use the interface type as the type of the controlling formal (see | |
e8376947 | 1847 | -- comment above). |
04c6d723 | 1848 | |
1849 | if not Is_Controlling_Formal (Formal) | |
1850 | or else Is_Predefined_Dispatching_Operation (Prim) | |
1851 | then | |
1852 | Ftyp := Etype (Formal); | |
1853 | Expr := New_Copy_Tree (Expression (Parent (Formal))); | |
1854 | else | |
1855 | Ftyp := Etype (Iface_Formal); | |
1856 | Expr := Empty; | |
1857 | end if; | |
1858 | ||
725a69d2 | 1859 | Append_To (Formals, |
1860 | Make_Parameter_Specification (Loc, | |
1861 | Defining_Identifier => | |
1862 | Make_Defining_Identifier (Sloc (Formal), | |
1863 | Chars => Chars (Formal)), | |
1864 | In_Present => In_Present (Parent (Formal)), | |
1865 | Out_Present => Out_Present (Parent (Formal)), | |
83c6c069 | 1866 | Parameter_Type => New_Occurrence_Of (Ftyp, Loc), |
04c6d723 | 1867 | Expression => Expr)); |
1868 | ||
1869 | if not Is_Predefined_Dispatching_Operation (Prim) then | |
1870 | Next_Formal (Iface_Formal); | |
1871 | end if; | |
d62940bf | 1872 | |
aad6babd | 1873 | Next_Formal (Formal); |
1874 | end loop; | |
1875 | ||
725a69d2 | 1876 | Target_Formal := First_Formal (Target); |
1877 | Formal := First (Formals); | |
1878 | while Present (Formal) loop | |
04c6d723 | 1879 | |
6cd460aa | 1880 | -- If the parent is a constrained discriminated type, then the |
1881 | -- primitive operation will have been defined on a first subtype. | |
1882 | -- For proper matching with controlling type, use base type. | |
04c6d723 | 1883 | |
1884 | if Ekind (Target_Formal) = E_In_Parameter | |
1885 | and then Ekind (Etype (Target_Formal)) = E_Anonymous_Access_Type | |
1886 | then | |
6cd460aa | 1887 | Ftyp := |
1888 | Base_Type (Directly_Designated_Type (Etype (Target_Formal))); | |
04c6d723 | 1889 | else |
ca12fde2 | 1890 | Ftyp := Base_Type (Etype (Target_Formal)); |
04c6d723 | 1891 | end if; |
1892 | ||
232a63ed | 1893 | -- For concurrent types, the relevant information is found in the |
1894 | -- Corresponding_Record_Type, rather than the type entity itself. | |
6cd460aa | 1895 | |
04c6d723 | 1896 | if Is_Concurrent_Type (Ftyp) then |
1897 | Ftyp := Corresponding_Record_Type (Ftyp); | |
1898 | end if; | |
1899 | ||
725a69d2 | 1900 | if Ekind (Target_Formal) = E_In_Parameter |
1901 | and then Ekind (Etype (Target_Formal)) = E_Anonymous_Access_Type | |
40cdae8b | 1902 | and then Is_Controlling_Formal (Target_Formal) |
725a69d2 | 1903 | then |
1904 | -- Generate: | |
17e14451 | 1905 | -- type T is access all <<type of the target formal>> |
1906 | -- S : Storage_Offset := Storage_Offset!(Formal) | |
4277e5bb | 1907 | -- + Offset_To_Top (address!(Formal)) |
725a69d2 | 1908 | |
1909 | Decl_2 := | |
1910 | Make_Full_Type_Declaration (Loc, | |
ec97ce79 | 1911 | Defining_Identifier => Make_Temporary (Loc, 'T'), |
725a69d2 | 1912 | Type_Definition => |
1913 | Make_Access_To_Object_Definition (Loc, | |
1914 | All_Present => True, | |
1915 | Null_Exclusion_Present => False, | |
1916 | Constant_Present => False, | |
1917 | Subtype_Indication => | |
83c6c069 | 1918 | New_Occurrence_Of (Ftyp, Loc))); |
725a69d2 | 1919 | |
cc60bd16 | 1920 | New_Arg := |
1921 | Unchecked_Convert_To (RTE (RE_Address), | |
83c6c069 | 1922 | New_Occurrence_Of (Defining_Identifier (Formal), Loc)); |
cc60bd16 | 1923 | |
1924 | if not RTE_Available (RE_Offset_To_Top) then | |
1925 | Offset_To_Top := | |
1926 | Build_Offset_To_Top (Loc, New_Arg); | |
1927 | else | |
1928 | Offset_To_Top := | |
1929 | Make_Function_Call (Loc, | |
83c6c069 | 1930 | Name => New_Occurrence_Of (RTE (RE_Offset_To_Top), Loc), |
cc60bd16 | 1931 | Parameter_Associations => New_List (New_Arg)); |
1932 | end if; | |
1933 | ||
725a69d2 | 1934 | Decl_1 := |
1935 | Make_Object_Declaration (Loc, | |
ec97ce79 | 1936 | Defining_Identifier => Make_Temporary (Loc, 'S'), |
725a69d2 | 1937 | Constant_Present => True, |
1938 | Object_Definition => | |
83c6c069 | 1939 | New_Occurrence_Of (RTE (RE_Storage_Offset), Loc), |
725a69d2 | 1940 | Expression => |
4277e5bb | 1941 | Make_Op_Add (Loc, |
725a69d2 | 1942 | Left_Opnd => |
1943 | Unchecked_Convert_To | |
1944 | (RTE (RE_Storage_Offset), | |
83c6c069 | 1945 | New_Occurrence_Of |
1946 | (Defining_Identifier (Formal), Loc)), | |
725a69d2 | 1947 | Right_Opnd => |
cc60bd16 | 1948 | Offset_To_Top)); |
725a69d2 | 1949 | |
1950 | Append_To (Decl, Decl_2); | |
1951 | Append_To (Decl, Decl_1); | |
1952 | ||
17e14451 | 1953 | -- Reference the new actual. Generate: |
1954 | -- T!(S) | |
725a69d2 | 1955 | |
1956 | Append_To (Actuals, | |
1957 | Unchecked_Convert_To | |
1958 | (Defining_Identifier (Decl_2), | |
83c6c069 | 1959 | New_Occurrence_Of (Defining_Identifier (Decl_1), Loc))); |
725a69d2 | 1960 | |
40cdae8b | 1961 | elsif Is_Controlling_Formal (Target_Formal) then |
aad6babd | 1962 | |
e8376947 | 1963 | -- Generate: |
17e14451 | 1964 | -- S1 : Storage_Offset := Storage_Offset!(Formal'Address) |
4277e5bb | 1965 | -- + Offset_To_Top (Formal'Address) |
17e14451 | 1966 | -- S2 : Addr_Ptr := Addr_Ptr!(S1) |
aad6babd | 1967 | |
cc60bd16 | 1968 | New_Arg := |
1969 | Make_Attribute_Reference (Loc, | |
1970 | Prefix => | |
83c6c069 | 1971 | New_Occurrence_Of (Defining_Identifier (Formal), Loc), |
cc60bd16 | 1972 | Attribute_Name => |
1973 | Name_Address); | |
1974 | ||
1975 | if not RTE_Available (RE_Offset_To_Top) then | |
1976 | Offset_To_Top := | |
1977 | Build_Offset_To_Top (Loc, New_Arg); | |
1978 | else | |
1979 | Offset_To_Top := | |
1980 | Make_Function_Call (Loc, | |
83c6c069 | 1981 | Name => New_Occurrence_Of (RTE (RE_Offset_To_Top), Loc), |
cc60bd16 | 1982 | Parameter_Associations => New_List (New_Arg)); |
1983 | end if; | |
1984 | ||
725a69d2 | 1985 | Decl_1 := |
1986 | Make_Object_Declaration (Loc, | |
ec97ce79 | 1987 | Defining_Identifier => Make_Temporary (Loc, 'S'), |
725a69d2 | 1988 | Constant_Present => True, |
1989 | Object_Definition => | |
83c6c069 | 1990 | New_Occurrence_Of (RTE (RE_Storage_Offset), Loc), |
725a69d2 | 1991 | Expression => |
4277e5bb | 1992 | Make_Op_Add (Loc, |
725a69d2 | 1993 | Left_Opnd => |
1994 | Unchecked_Convert_To | |
1995 | (RTE (RE_Storage_Offset), | |
1996 | Make_Attribute_Reference (Loc, | |
1997 | Prefix => | |
83c6c069 | 1998 | New_Occurrence_Of |
725a69d2 | 1999 | (Defining_Identifier (Formal), Loc), |
2000 | Attribute_Name => Name_Address)), | |
2001 | Right_Opnd => | |
cc60bd16 | 2002 | Offset_To_Top)); |
aad6babd | 2003 | |
725a69d2 | 2004 | Decl_2 := |
2005 | Make_Object_Declaration (Loc, | |
ec97ce79 | 2006 | Defining_Identifier => Make_Temporary (Loc, 'S'), |
2007 | Constant_Present => True, | |
2008 | Object_Definition => | |
83c6c069 | 2009 | New_Occurrence_Of (RTE (RE_Addr_Ptr), Loc), |
ec97ce79 | 2010 | Expression => |
725a69d2 | 2011 | Unchecked_Convert_To |
2012 | (RTE (RE_Addr_Ptr), | |
83c6c069 | 2013 | New_Occurrence_Of (Defining_Identifier (Decl_1), Loc))); |
aad6babd | 2014 | |
725a69d2 | 2015 | Append_To (Decl, Decl_1); |
2016 | Append_To (Decl, Decl_2); | |
952af0b9 | 2017 | |
ec97ce79 | 2018 | -- Reference the new actual, generate: |
17e14451 | 2019 | -- Target_Formal (S2.all) |
aad6babd | 2020 | |
725a69d2 | 2021 | Append_To (Actuals, |
04c6d723 | 2022 | Unchecked_Convert_To (Ftyp, |
725a69d2 | 2023 | Make_Explicit_Dereference (Loc, |
83c6c069 | 2024 | New_Occurrence_Of (Defining_Identifier (Decl_2), Loc)))); |
aad6babd | 2025 | |
984d005d | 2026 | -- Ensure proper matching of access types. Required to avoid |
2027 | -- reporting spurious errors. | |
2028 | ||
2029 | elsif Is_Access_Type (Etype (Target_Formal)) then | |
2030 | Append_To (Actuals, | |
2031 | Unchecked_Convert_To (Base_Type (Etype (Target_Formal)), | |
83c6c069 | 2032 | New_Occurrence_Of (Defining_Identifier (Formal), Loc))); |
984d005d | 2033 | |
725a69d2 | 2034 | -- No special management required for this actual |
aad6babd | 2035 | |
725a69d2 | 2036 | else |
2037 | Append_To (Actuals, | |
83c6c069 | 2038 | New_Occurrence_Of (Defining_Identifier (Formal), Loc)); |
725a69d2 | 2039 | end if; |
2040 | ||
2041 | Next_Formal (Target_Formal); | |
aad6babd | 2042 | Next (Formal); |
2043 | end loop; | |
2044 | ||
ec97ce79 | 2045 | Thunk_Id := Make_Temporary (Loc, 'T'); |
b1961352 | 2046 | Set_Ekind (Thunk_Id, Ekind (Prim)); |
e7e688dd | 2047 | Set_Is_Thunk (Thunk_Id); |
265200d0 | 2048 | Set_Convention (Thunk_Id, Convention (Prim)); |
cdc5a761 | 2049 | Set_Thunk_Entity (Thunk_Id, Target); |
e7e688dd | 2050 | |
e8376947 | 2051 | -- Procedure case |
2052 | ||
d62940bf | 2053 | if Ekind (Target) = E_Procedure then |
725a69d2 | 2054 | Thunk_Code := |
aad6babd | 2055 | Make_Subprogram_Body (Loc, |
2056 | Specification => | |
2057 | Make_Procedure_Specification (Loc, | |
2058 | Defining_Unit_Name => Thunk_Id, | |
2059 | Parameter_Specifications => Formals), | |
2060 | Declarations => Decl, | |
2061 | Handled_Statement_Sequence => | |
2062 | Make_Handled_Sequence_Of_Statements (Loc, | |
2063 | Statements => New_List ( | |
2064 | Make_Procedure_Call_Statement (Loc, | |
725a69d2 | 2065 | Name => New_Occurrence_Of (Target, Loc), |
2066 | Parameter_Associations => Actuals)))); | |
aad6babd | 2067 | |
e8376947 | 2068 | -- Function case |
aad6babd | 2069 | |
e8376947 | 2070 | else pragma Assert (Ekind (Target) = E_Function); |
61ce7f9f | 2071 | declare |
2072 | Result_Def : Node_Id; | |
2073 | Call_Node : Node_Id; | |
2074 | ||
2075 | begin | |
2076 | Call_Node := | |
2077 | Make_Function_Call (Loc, | |
2078 | Name => New_Occurrence_Of (Target, Loc), | |
2079 | Parameter_Associations => Actuals); | |
2080 | ||
2081 | if not Is_Interface (Etype (Prim)) then | |
2082 | Result_Def := New_Copy (Result_Definition (Parent (Target))); | |
2083 | ||
2084 | -- Thunk of function returning a class-wide interface object. No | |
2085 | -- extra displacement needed since the displacement is generated | |
2086 | -- in the return statement of Prim. Example: | |
2087 | ||
2088 | -- type Iface is interface ... | |
2089 | -- function F (O : Iface) return Iface'Class; | |
2090 | ||
2091 | -- type T is new ... and Iface with ... | |
2092 | -- function F (O : T) return Iface'Class; | |
2093 | ||
2094 | elsif Is_Class_Wide_Type (Etype (Prim)) then | |
2095 | Result_Def := New_Occurrence_Of (Etype (Prim), Loc); | |
2096 | ||
2097 | -- Thunk of function returning an interface object. Displacement | |
2098 | -- needed. Example: | |
2099 | ||
2100 | -- type Iface is interface ... | |
2101 | -- function F (O : Iface) return Iface; | |
2102 | ||
2103 | -- type T is new ... and Iface with ... | |
2104 | -- function F (O : T) return T; | |
2105 | ||
2106 | else | |
2107 | Result_Def := | |
2108 | New_Occurrence_Of (Class_Wide_Type (Etype (Prim)), Loc); | |
2109 | ||
2110 | -- Adding implicit conversion to force the displacement of | |
2111 | -- the pointer to the object to reference the corresponding | |
2112 | -- secondary dispatch table. | |
2113 | ||
2114 | Call_Node := | |
2115 | Make_Type_Conversion (Loc, | |
2116 | Subtype_Mark => | |
2117 | New_Occurrence_Of (Class_Wide_Type (Etype (Prim)), Loc), | |
2118 | Expression => Relocate_Node (Call_Node)); | |
2119 | end if; | |
2120 | ||
2121 | Thunk_Code := | |
2122 | Make_Subprogram_Body (Loc, | |
02a2406d | 2123 | Specification => |
61ce7f9f | 2124 | Make_Function_Specification (Loc, |
2125 | Defining_Unit_Name => Thunk_Id, | |
2126 | Parameter_Specifications => Formals, | |
2127 | Result_Definition => Result_Def), | |
02a2406d | 2128 | Declarations => Decl, |
61ce7f9f | 2129 | Handled_Statement_Sequence => |
2130 | Make_Handled_Sequence_Of_Statements (Loc, | |
2131 | Statements => New_List ( | |
2132 | Make_Simple_Return_Statement (Loc, Call_Node)))); | |
2133 | end; | |
aad6babd | 2134 | end if; |
aad6babd | 2135 | end Expand_Interface_Thunk; |
2136 | ||
d00681a7 | 2137 | -------------------------- |
2138 | -- Has_CPP_Constructors -- | |
2139 | -------------------------- | |
2140 | ||
2141 | function Has_CPP_Constructors (Typ : Entity_Id) return Boolean is | |
2142 | E : Entity_Id; | |
2143 | ||
2144 | begin | |
2145 | -- Look for the constructor entities | |
2146 | ||
2147 | E := Next_Entity (Typ); | |
2148 | while Present (E) loop | |
02a2406d | 2149 | if Ekind (E) = E_Function and then Is_Constructor (E) then |
d00681a7 | 2150 | return True; |
2151 | end if; | |
2152 | ||
2153 | Next_Entity (E); | |
2154 | end loop; | |
2155 | ||
2156 | return False; | |
2157 | end Has_CPP_Constructors; | |
2158 | ||
24971415 | 2159 | ------------ |
2160 | -- Has_DT -- | |
2161 | ------------ | |
2162 | ||
2163 | function Has_DT (Typ : Entity_Id) return Boolean is | |
2164 | begin | |
2165 | return not Is_Interface (Typ) | |
02a2406d | 2166 | and then not Restriction_Active (No_Dispatching_Calls); |
24971415 | 2167 | end Has_DT; |
2168 | ||
687b5687 | 2169 | ---------------------------------- |
2170 | -- Is_Expanded_Dispatching_Call -- | |
2171 | ---------------------------------- | |
2172 | ||
2173 | function Is_Expanded_Dispatching_Call (N : Node_Id) return Boolean is | |
2174 | begin | |
2175 | return Nkind (N) in N_Subprogram_Call | |
2176 | and then Nkind (Name (N)) = N_Explicit_Dereference | |
2177 | and then Is_Dispatch_Table_Entity (Etype (Name (N))); | |
2178 | end Is_Expanded_Dispatching_Call; | |
2179 | ||
af647dc7 | 2180 | ------------------------------------- |
2181 | -- Is_Predefined_Dispatching_Alias -- | |
2182 | ------------------------------------- | |
2183 | ||
2184 | function Is_Predefined_Dispatching_Alias (Prim : Entity_Id) return Boolean | |
2185 | is | |
af647dc7 | 2186 | begin |
fc2907f6 | 2187 | return not Is_Predefined_Dispatching_Operation (Prim) |
af647dc7 | 2188 | and then Present (Alias (Prim)) |
fc2907f6 | 2189 | and then Is_Predefined_Dispatching_Operation (Ultimate_Alias (Prim)); |
af647dc7 | 2190 | end Is_Predefined_Dispatching_Alias; |
2191 | ||
76a1c25b | 2192 | ---------------------------------------- |
2193 | -- Make_Disp_Asynchronous_Select_Body -- | |
2194 | ---------------------------------------- | |
ee6ba406 | 2195 | |
cdb1c38f | 2196 | -- For interface types, generate: |
2197 | ||
2198 | -- procedure _Disp_Asynchronous_Select | |
2199 | -- (T : in out <Typ>; | |
2200 | -- S : Integer; | |
2201 | -- P : System.Address; | |
2202 | -- B : out System.Storage_Elements.Dummy_Communication_Block; | |
2203 | -- F : out Boolean) | |
2204 | -- is | |
2205 | -- begin | |
a053db0d | 2206 | -- F := False; |
2207 | -- C := Ada.Tags.POK_Function; | |
cdb1c38f | 2208 | -- end _Disp_Asynchronous_Select; |
2209 | ||
2210 | -- For protected types, generate: | |
2211 | ||
2212 | -- procedure _Disp_Asynchronous_Select | |
2213 | -- (T : in out <Typ>; | |
2214 | -- S : Integer; | |
2215 | -- P : System.Address; | |
2216 | -- B : out System.Storage_Elements.Dummy_Communication_Block; | |
2217 | -- F : out Boolean) | |
2218 | -- is | |
2219 | -- I : Integer := | |
2220 | -- Ada.Tags.Get_Entry_Index (Ada.Tags.Tag (<Typ>VP, S)); | |
2221 | -- Bnn : System.Tasking.Protected_Objects.Operations. | |
2222 | -- Communication_Block; | |
2223 | -- begin | |
2224 | -- System.Tasking.Protected_Objects.Operations.Protected_Entry_Call | |
2225 | -- (T._object'Access, | |
2226 | -- System.Tasking.Protected_Objects.Protected_Entry_Index (I), | |
2227 | -- P, | |
2228 | -- System.Tasking.Asynchronous_Call, | |
2229 | -- Bnn); | |
2230 | -- B := System.Storage_Elements.Dummy_Communication_Block (Bnn); | |
2231 | -- end _Disp_Asynchronous_Select; | |
2232 | ||
2233 | -- For task types, generate: | |
2234 | ||
2235 | -- procedure _Disp_Asynchronous_Select | |
2236 | -- (T : in out <Typ>; | |
2237 | -- S : Integer; | |
2238 | -- P : System.Address; | |
2239 | -- B : out System.Storage_Elements.Dummy_Communication_Block; | |
2240 | -- F : out Boolean) | |
2241 | -- is | |
2242 | -- I : Integer := | |
2243 | -- Ada.Tags.Get_Entry_Index (Ada.Tags.Tag (<Typ>VP, S)); | |
2244 | -- begin | |
2245 | -- System.Tasking.Rendezvous.Task_Entry_Call | |
2246 | -- (T._task_id, | |
2247 | -- System.Tasking.Task_Entry_Index (I), | |
2248 | -- P, | |
2249 | -- System.Tasking.Asynchronous_Call, | |
2250 | -- F); | |
2251 | -- end _Disp_Asynchronous_Select; | |
2252 | ||
76a1c25b | 2253 | function Make_Disp_Asynchronous_Select_Body |
2254 | (Typ : Entity_Id) return Node_Id | |
2255 | is | |
725a69d2 | 2256 | Com_Block : Entity_Id; |
2257 | Conc_Typ : Entity_Id := Empty; | |
2258 | Decls : constant List_Id := New_List; | |
725a69d2 | 2259 | Loc : constant Source_Ptr := Sloc (Typ); |
acf97c11 | 2260 | Obj_Ref : Node_Id; |
725a69d2 | 2261 | Stmts : constant List_Id := New_List; |
bf7f5966 | 2262 | Tag_Node : Node_Id; |
ee6ba406 | 2263 | |
2264 | begin | |
68f95949 | 2265 | pragma Assert (not Restriction_Active (No_Dispatching_Calls)); |
2266 | ||
952af0b9 | 2267 | -- Null body is generated for interface types |
2268 | ||
76a1c25b | 2269 | if Is_Interface (Typ) then |
2270 | return | |
2271 | Make_Subprogram_Body (Loc, | |
02a2406d | 2272 | Specification => |
2273 | Make_Disp_Asynchronous_Select_Spec (Typ), | |
2274 | Declarations => New_List, | |
76a1c25b | 2275 | Handled_Statement_Sequence => |
2276 | Make_Handled_Sequence_Of_Statements (Loc, | |
02a2406d | 2277 | New_List ( |
2278 | Make_Assignment_Statement (Loc, | |
2279 | Name => Make_Identifier (Loc, Name_uF), | |
2280 | Expression => New_Occurrence_Of (Standard_False, Loc))))); | |
9dfe12ae | 2281 | end if; |
2282 | ||
952af0b9 | 2283 | if Is_Concurrent_Record_Type (Typ) then |
2284 | Conc_Typ := Corresponding_Concurrent_Type (Typ); | |
aad6babd | 2285 | |
76a1c25b | 2286 | -- Generate: |
cdb1c38f | 2287 | -- I : Integer := |
2288 | -- Ada.Tags.Get_Entry_Index (Ada.Tags.Tag! (<type>VP), S); | |
aad6babd | 2289 | |
76a1c25b | 2290 | -- where I will be used to capture the entry index of the primitive |
2291 | -- wrapper at position S. | |
aad6babd | 2292 | |
bf7f5966 | 2293 | if Tagged_Type_Expansion then |
2294 | Tag_Node := | |
2295 | Unchecked_Convert_To (RTE (RE_Tag), | |
83c6c069 | 2296 | New_Occurrence_Of |
bf7f5966 | 2297 | (Node (First_Elmt (Access_Disp_Table (Typ))), Loc)); |
2298 | else | |
2299 | Tag_Node := | |
2300 | Make_Attribute_Reference (Loc, | |
02a2406d | 2301 | Prefix => New_Occurrence_Of (Typ, Loc), |
bf7f5966 | 2302 | Attribute_Name => Name_Tag); |
2303 | end if; | |
2304 | ||
76a1c25b | 2305 | Append_To (Decls, |
2306 | Make_Object_Declaration (Loc, | |
2307 | Defining_Identifier => | |
2308 | Make_Defining_Identifier (Loc, Name_uI), | |
02a2406d | 2309 | Object_Definition => |
83c6c069 | 2310 | New_Occurrence_Of (Standard_Integer, Loc), |
02a2406d | 2311 | Expression => |
725a69d2 | 2312 | Make_Function_Call (Loc, |
02a2406d | 2313 | Name => |
83c6c069 | 2314 | New_Occurrence_Of (RTE (RE_Get_Entry_Index), Loc), |
cdb1c38f | 2315 | Parameter_Associations => |
02a2406d | 2316 | New_List (Tag_Node, Make_Identifier (Loc, Name_uS))))); |
aad6babd | 2317 | |
76a1c25b | 2318 | if Ekind (Conc_Typ) = E_Protected_Type then |
aad6babd | 2319 | |
725a69d2 | 2320 | -- Generate: |
cdb1c38f | 2321 | -- Bnn : Communication_Block; |
725a69d2 | 2322 | |
ec97ce79 | 2323 | Com_Block := Make_Temporary (Loc, 'B'); |
725a69d2 | 2324 | Append_To (Decls, |
2325 | Make_Object_Declaration (Loc, | |
02a2406d | 2326 | Defining_Identifier => Com_Block, |
2327 | Object_Definition => | |
83c6c069 | 2328 | New_Occurrence_Of (RTE (RE_Communication_Block), Loc))); |
725a69d2 | 2329 | |
acf97c11 | 2330 | -- Build T._object'Access for calls below |
aad6babd | 2331 | |
acf97c11 | 2332 | Obj_Ref := |
2333 | Make_Attribute_Reference (Loc, | |
2334 | Attribute_Name => Name_Unchecked_Access, | |
2335 | Prefix => | |
2336 | Make_Selected_Component (Loc, | |
2337 | Prefix => Make_Identifier (Loc, Name_uT), | |
2338 | Selector_Name => Make_Identifier (Loc, Name_uObject))); | |
aad6babd | 2339 | |
acf97c11 | 2340 | case Corresponding_Runtime_Package (Conc_Typ) is |
2341 | when System_Tasking_Protected_Objects_Entries => | |
aad6babd | 2342 | |
acf97c11 | 2343 | -- Generate: |
2344 | -- Protected_Entry_Call | |
2345 | -- (T._object'Access, -- Object | |
2346 | -- Protected_Entry_Index! (I), -- E | |
2347 | -- P, -- Uninterpreted_Data | |
2348 | -- Asynchronous_Call, -- Mode | |
2349 | -- Bnn); -- Communication_Block | |
2350 | ||
2351 | -- where T is the protected object, I is the entry index, P | |
2352 | -- is the wrapped parameters and B is the name of the | |
2353 | -- communication block. | |
2354 | ||
2355 | Append_To (Stmts, | |
2356 | Make_Procedure_Call_Statement (Loc, | |
02a2406d | 2357 | Name => |
83c6c069 | 2358 | New_Occurrence_Of (RTE (RE_Protected_Entry_Call), Loc), |
acf97c11 | 2359 | Parameter_Associations => |
2360 | New_List ( | |
2361 | Obj_Ref, | |
aad6babd | 2362 | |
acf97c11 | 2363 | Make_Unchecked_Type_Conversion (Loc, -- entry index |
2364 | Subtype_Mark => | |
83c6c069 | 2365 | New_Occurrence_Of |
55868293 | 2366 | (RTE (RE_Protected_Entry_Index), Loc), |
acf97c11 | 2367 | Expression => Make_Identifier (Loc, Name_uI)), |
d62940bf | 2368 | |
acf97c11 | 2369 | Make_Identifier (Loc, Name_uP), -- parameter block |
83c6c069 | 2370 | New_Occurrence_Of -- Asynchronous_Call |
55868293 | 2371 | (RTE (RE_Asynchronous_Call), Loc), |
83c6c069 | 2372 | New_Occurrence_Of -- comm block |
2373 | (Com_Block, Loc)))); | |
acf97c11 | 2374 | |
acf97c11 | 2375 | when others => |
2376 | raise Program_Error; | |
2377 | end case; | |
725a69d2 | 2378 | |
2379 | -- Generate: | |
cdb1c38f | 2380 | -- B := Dummy_Communication_Block (Bnn); |
725a69d2 | 2381 | |
2382 | Append_To (Stmts, | |
2383 | Make_Assignment_Statement (Loc, | |
55868293 | 2384 | Name => Make_Identifier (Loc, Name_uB), |
725a69d2 | 2385 | Expression => |
2386 | Make_Unchecked_Type_Conversion (Loc, | |
2387 | Subtype_Mark => | |
02a2406d | 2388 | New_Occurrence_Of |
2389 | (RTE (RE_Dummy_Communication_Block), Loc), | |
2390 | Expression => New_Occurrence_Of (Com_Block, Loc)))); | |
725a69d2 | 2391 | |
a053db0d | 2392 | -- Generate: |
2393 | -- F := False; | |
2394 | ||
2395 | Append_To (Stmts, | |
2396 | Make_Assignment_Statement (Loc, | |
aabafdc2 | 2397 | Name => Make_Identifier (Loc, Name_uF), |
83c6c069 | 2398 | Expression => New_Occurrence_Of (Standard_False, Loc))); |
a053db0d | 2399 | |
76a1c25b | 2400 | else |
2401 | pragma Assert (Ekind (Conc_Typ) = E_Task_Type); | |
d62940bf | 2402 | |
76a1c25b | 2403 | -- Generate: |
cdb1c38f | 2404 | -- Task_Entry_Call |
2405 | -- (T._task_id, -- Acceptor | |
2406 | -- Task_Entry_Index! (I), -- E | |
2407 | -- P, -- Uninterpreted_Data | |
2408 | -- Asynchronous_Call, -- Mode | |
2409 | -- F); -- Rendezvous_Successful | |
ee6ba406 | 2410 | |
acf97c11 | 2411 | -- where T is the task object, I is the entry index, P is the |
76a1c25b | 2412 | -- wrapped parameters and F is the status flag. |
ee6ba406 | 2413 | |
76a1c25b | 2414 | Append_To (Stmts, |
2415 | Make_Procedure_Call_Statement (Loc, | |
02a2406d | 2416 | Name => |
83c6c069 | 2417 | New_Occurrence_Of (RTE (RE_Task_Entry_Call), Loc), |
76a1c25b | 2418 | Parameter_Associations => |
2419 | New_List ( | |
76a1c25b | 2420 | Make_Selected_Component (Loc, -- T._task_id |
55868293 | 2421 | Prefix => Make_Identifier (Loc, Name_uT), |
2422 | Selector_Name => Make_Identifier (Loc, Name_uTask_Id)), | |
ee6ba406 | 2423 | |
76a1c25b | 2424 | Make_Unchecked_Type_Conversion (Loc, -- entry index |
2425 | Subtype_Mark => | |
83c6c069 | 2426 | New_Occurrence_Of (RTE (RE_Task_Entry_Index), Loc), |
02a2406d | 2427 | Expression => Make_Identifier (Loc, Name_uI)), |
ee6ba406 | 2428 | |
76a1c25b | 2429 | Make_Identifier (Loc, Name_uP), -- parameter block |
83c6c069 | 2430 | New_Occurrence_Of -- Asynchronous_Call |
55868293 | 2431 | (RTE (RE_Asynchronous_Call), Loc), |
76a1c25b | 2432 | Make_Identifier (Loc, Name_uF)))); -- status flag |
2433 | end if; | |
7c949aad | 2434 | |
2435 | else | |
2436 | -- Ensure that the statements list is non-empty | |
2437 | ||
a053db0d | 2438 | Append_To (Stmts, |
2439 | Make_Assignment_Statement (Loc, | |
aabafdc2 | 2440 | Name => Make_Identifier (Loc, Name_uF), |
83c6c069 | 2441 | Expression => New_Occurrence_Of (Standard_False, Loc))); |
76a1c25b | 2442 | end if; |
ee6ba406 | 2443 | |
76a1c25b | 2444 | return |
2445 | Make_Subprogram_Body (Loc, | |
aabafdc2 | 2446 | Specification => |
76a1c25b | 2447 | Make_Disp_Asynchronous_Select_Spec (Typ), |
aabafdc2 | 2448 | Declarations => Decls, |
76a1c25b | 2449 | Handled_Statement_Sequence => |
2450 | Make_Handled_Sequence_Of_Statements (Loc, Stmts)); | |
2451 | end Make_Disp_Asynchronous_Select_Body; | |
ee6ba406 | 2452 | |
76a1c25b | 2453 | ---------------------------------------- |
2454 | -- Make_Disp_Asynchronous_Select_Spec -- | |
2455 | ---------------------------------------- | |
ee6ba406 | 2456 | |
76a1c25b | 2457 | function Make_Disp_Asynchronous_Select_Spec |
2458 | (Typ : Entity_Id) return Node_Id | |
2459 | is | |
2460 | Loc : constant Source_Ptr := Sloc (Typ); | |
2461 | Def_Id : constant Node_Id := | |
2462 | Make_Defining_Identifier (Loc, | |
2463 | Name_uDisp_Asynchronous_Select); | |
2464 | Params : constant List_Id := New_List; | |
ee6ba406 | 2465 | |
76a1c25b | 2466 | begin |
68f95949 | 2467 | pragma Assert (not Restriction_Active (No_Dispatching_Calls)); |
2468 | ||
725a69d2 | 2469 | -- T : in out Typ; -- Object parameter |
2470 | -- S : Integer; -- Primitive operation slot | |
2471 | -- P : Address; -- Wrapped parameters | |
2472 | -- B : out Dummy_Communication_Block; -- Communication block dummy | |
2473 | -- F : out Boolean; -- Status flag | |
ee6ba406 | 2474 | |
725a69d2 | 2475 | Append_List_To (Params, New_List ( |
2476 | ||
2477 | Make_Parameter_Specification (Loc, | |
02a2406d | 2478 | Defining_Identifier => Make_Defining_Identifier (Loc, Name_uT), |
2479 | Parameter_Type => New_Occurrence_Of (Typ, Loc), | |
2480 | In_Present => True, | |
2481 | Out_Present => True), | |
725a69d2 | 2482 | |
2483 | Make_Parameter_Specification (Loc, | |
02a2406d | 2484 | Defining_Identifier => Make_Defining_Identifier (Loc, Name_uS), |
2485 | Parameter_Type => New_Occurrence_Of (Standard_Integer, Loc)), | |
725a69d2 | 2486 | |
2487 | Make_Parameter_Specification (Loc, | |
02a2406d | 2488 | Defining_Identifier => Make_Defining_Identifier (Loc, Name_uP), |
2489 | Parameter_Type => New_Occurrence_Of (RTE (RE_Address), Loc)), | |
725a69d2 | 2490 | |
2491 | Make_Parameter_Specification (Loc, | |
02a2406d | 2492 | Defining_Identifier => Make_Defining_Identifier (Loc, Name_uB), |
2493 | Parameter_Type => | |
83c6c069 | 2494 | New_Occurrence_Of (RTE (RE_Dummy_Communication_Block), Loc), |
02a2406d | 2495 | Out_Present => True), |
ee6ba406 | 2496 | |
725a69d2 | 2497 | Make_Parameter_Specification (Loc, |
02a2406d | 2498 | Defining_Identifier => Make_Defining_Identifier (Loc, Name_uF), |
2499 | Parameter_Type => New_Occurrence_Of (Standard_Boolean, Loc), | |
2500 | Out_Present => True))); | |
7189d17f | 2501 | |
76a1c25b | 2502 | return |
725a69d2 | 2503 | Make_Procedure_Specification (Loc, |
2504 | Defining_Unit_Name => Def_Id, | |
2505 | Parameter_Specifications => Params); | |
76a1c25b | 2506 | end Make_Disp_Asynchronous_Select_Spec; |
ee6ba406 | 2507 | |
76a1c25b | 2508 | --------------------------------------- |
2509 | -- Make_Disp_Conditional_Select_Body -- | |
2510 | --------------------------------------- | |
ee6ba406 | 2511 | |
cdb1c38f | 2512 | -- For interface types, generate: |
2513 | ||
2514 | -- procedure _Disp_Conditional_Select | |
2515 | -- (T : in out <Typ>; | |
2516 | -- S : Integer; | |
2517 | -- P : System.Address; | |
2518 | -- C : out Ada.Tags.Prim_Op_Kind; | |
2519 | -- F : out Boolean) | |
2520 | -- is | |
2521 | -- begin | |
a053db0d | 2522 | -- F := False; |
2523 | -- C := Ada.Tags.POK_Function; | |
cdb1c38f | 2524 | -- end _Disp_Conditional_Select; |
2525 | ||
2526 | -- For protected types, generate: | |
2527 | ||
2528 | -- procedure _Disp_Conditional_Select | |
2529 | -- (T : in out <Typ>; | |
2530 | -- S : Integer; | |
2531 | -- P : System.Address; | |
2532 | -- C : out Ada.Tags.Prim_Op_Kind; | |
2533 | -- F : out Boolean) | |
2534 | -- is | |
2535 | -- I : Integer; | |
2536 | -- Bnn : System.Tasking.Protected_Objects.Operations. | |
2537 | -- Communication_Block; | |
2538 | ||
2539 | -- begin | |
2540 | -- C := Ada.Tags.Get_Prim_Op_Kind (Ada.Tags.Tag (<Typ>VP, S)); | |
2541 | ||
2542 | -- if C = Ada.Tags.POK_Procedure | |
2543 | -- or else C = Ada.Tags.POK_Protected_Procedure | |
2544 | -- or else C = Ada.Tags.POK_Task_Procedure | |
2545 | -- then | |
2546 | -- F := True; | |
2547 | -- return; | |
2548 | -- end if; | |
2549 | ||
2550 | -- I := Ada.Tags.Get_Entry_Index (Ada.Tags.Tag (<Typ>VP, S)); | |
2551 | -- System.Tasking.Protected_Objects.Operations.Protected_Entry_Call | |
2552 | -- (T.object'Access, | |
2553 | -- System.Tasking.Protected_Objects.Protected_Entry_Index (I), | |
2554 | -- P, | |
2555 | -- System.Tasking.Conditional_Call, | |
2556 | -- Bnn); | |
2557 | -- F := not Cancelled (Bnn); | |
2558 | -- end _Disp_Conditional_Select; | |
2559 | ||
2560 | -- For task types, generate: | |
2561 | ||
2562 | -- procedure _Disp_Conditional_Select | |
2563 | -- (T : in out <Typ>; | |
2564 | -- S : Integer; | |
2565 | -- P : System.Address; | |
2566 | -- C : out Ada.Tags.Prim_Op_Kind; | |
2567 | -- F : out Boolean) | |
2568 | -- is | |
2569 | -- I : Integer; | |
2570 | ||
2571 | -- begin | |
2572 | -- I := Ada.Tags.Get_Entry_Index (Ada.Tags.Tag (<Typ>VP, S)); | |
2573 | -- System.Tasking.Rendezvous.Task_Entry_Call | |
2574 | -- (T._task_id, | |
2575 | -- System.Tasking.Task_Entry_Index (I), | |
2576 | -- P, | |
2577 | -- System.Tasking.Conditional_Call, | |
2578 | -- F); | |
2579 | -- end _Disp_Conditional_Select; | |
2580 | ||
76a1c25b | 2581 | function Make_Disp_Conditional_Select_Body |
2582 | (Typ : Entity_Id) return Node_Id | |
2583 | is | |
2584 | Loc : constant Source_Ptr := Sloc (Typ); | |
2585 | Blk_Nam : Entity_Id; | |
2586 | Conc_Typ : Entity_Id := Empty; | |
2587 | Decls : constant List_Id := New_List; | |
acf97c11 | 2588 | Obj_Ref : Node_Id; |
76a1c25b | 2589 | Stmts : constant List_Id := New_List; |
bf7f5966 | 2590 | Tag_Node : Node_Id; |
ee6ba406 | 2591 | |
76a1c25b | 2592 | begin |
68f95949 | 2593 | pragma Assert (not Restriction_Active (No_Dispatching_Calls)); |
2594 | ||
952af0b9 | 2595 | -- Null body is generated for interface types |
2596 | ||
76a1c25b | 2597 | if Is_Interface (Typ) then |
2598 | return | |
2599 | Make_Subprogram_Body (Loc, | |
02a2406d | 2600 | Specification => |
76a1c25b | 2601 | Make_Disp_Conditional_Select_Spec (Typ), |
02a2406d | 2602 | Declarations => No_List, |
76a1c25b | 2603 | Handled_Statement_Sequence => |
2604 | Make_Handled_Sequence_Of_Statements (Loc, | |
a053db0d | 2605 | New_List (Make_Assignment_Statement (Loc, |
aabafdc2 | 2606 | Name => Make_Identifier (Loc, Name_uF), |
83c6c069 | 2607 | Expression => New_Occurrence_Of (Standard_False, Loc))))); |
76a1c25b | 2608 | end if; |
ee6ba406 | 2609 | |
952af0b9 | 2610 | if Is_Concurrent_Record_Type (Typ) then |
2611 | Conc_Typ := Corresponding_Concurrent_Type (Typ); | |
ee6ba406 | 2612 | |
76a1c25b | 2613 | -- Generate: |
2614 | -- I : Integer; | |
ee6ba406 | 2615 | |
76a1c25b | 2616 | -- where I will be used to capture the entry index of the primitive |
2617 | -- wrapper at position S. | |
ee6ba406 | 2618 | |
76a1c25b | 2619 | Append_To (Decls, |
2620 | Make_Object_Declaration (Loc, | |
02a2406d | 2621 | Defining_Identifier => Make_Defining_Identifier (Loc, Name_uI), |
2622 | Object_Definition => | |
83c6c069 | 2623 | New_Occurrence_Of (Standard_Integer, Loc))); |
ee6ba406 | 2624 | |
952af0b9 | 2625 | -- Generate: |
cdb1c38f | 2626 | -- C := Ada.Tags.Get_Prim_Op_Kind (Ada.Tags.Tag! (<type>VP), S); |
ee6ba406 | 2627 | |
952af0b9 | 2628 | -- if C = POK_Procedure |
2629 | -- or else C = POK_Protected_Procedure | |
2630 | -- or else C = POK_Task_Procedure; | |
2631 | -- then | |
2632 | -- F := True; | |
2633 | -- return; | |
2634 | -- end if; | |
aad6babd | 2635 | |
e58ae6f1 | 2636 | Build_Common_Dispatching_Select_Statements (Typ, Stmts); |
aad6babd | 2637 | |
76a1c25b | 2638 | -- Generate: |
2639 | -- Bnn : Communication_Block; | |
aad6babd | 2640 | |
cdb1c38f | 2641 | -- where Bnn is the name of the communication block used in the |
2642 | -- call to Protected_Entry_Call. | |
aad6babd | 2643 | |
ec97ce79 | 2644 | Blk_Nam := Make_Temporary (Loc, 'B'); |
76a1c25b | 2645 | Append_To (Decls, |
2646 | Make_Object_Declaration (Loc, | |
02a2406d | 2647 | Defining_Identifier => Blk_Nam, |
2648 | Object_Definition => | |
83c6c069 | 2649 | New_Occurrence_Of (RTE (RE_Communication_Block), Loc))); |
aad6babd | 2650 | |
76a1c25b | 2651 | -- Generate: |
cdb1c38f | 2652 | -- I := Ada.Tags.Get_Entry_Index (Ada.Tags.Tag! (<type>VP), S); |
aad6babd | 2653 | |
76a1c25b | 2654 | -- I is the entry index and S is the dispatch table slot |
aad6babd | 2655 | |
bf7f5966 | 2656 | if Tagged_Type_Expansion then |
2657 | Tag_Node := | |
2658 | Unchecked_Convert_To (RTE (RE_Tag), | |
83c6c069 | 2659 | New_Occurrence_Of |
bf7f5966 | 2660 | (Node (First_Elmt (Access_Disp_Table (Typ))), Loc)); |
2661 | ||
2662 | else | |
2663 | Tag_Node := | |
2664 | Make_Attribute_Reference (Loc, | |
02a2406d | 2665 | Prefix => New_Occurrence_Of (Typ, Loc), |
bf7f5966 | 2666 | Attribute_Name => Name_Tag); |
2667 | end if; | |
2668 | ||
76a1c25b | 2669 | Append_To (Stmts, |
2670 | Make_Assignment_Statement (Loc, | |
02a2406d | 2671 | Name => Make_Identifier (Loc, Name_uI), |
76a1c25b | 2672 | Expression => |
725a69d2 | 2673 | Make_Function_Call (Loc, |
02a2406d | 2674 | Name => |
83c6c069 | 2675 | New_Occurrence_Of (RTE (RE_Get_Entry_Index), Loc), |
02a2406d | 2676 | Parameter_Associations => New_List ( |
2677 | Tag_Node, | |
2678 | Make_Identifier (Loc, Name_uS))))); | |
ee6ba406 | 2679 | |
76a1c25b | 2680 | if Ekind (Conc_Typ) = E_Protected_Type then |
ee6ba406 | 2681 | |
acf97c11 | 2682 | Obj_Ref := -- T._object'Access |
2683 | Make_Attribute_Reference (Loc, | |
2684 | Attribute_Name => Name_Unchecked_Access, | |
2685 | Prefix => | |
2686 | Make_Selected_Component (Loc, | |
2687 | Prefix => Make_Identifier (Loc, Name_uT), | |
2688 | Selector_Name => Make_Identifier (Loc, Name_uObject))); | |
ee6ba406 | 2689 | |
acf97c11 | 2690 | case Corresponding_Runtime_Package (Conc_Typ) is |
2691 | when System_Tasking_Protected_Objects_Entries => | |
2692 | -- Generate: | |
e1c20931 | 2693 | |
acf97c11 | 2694 | -- Protected_Entry_Call |
2695 | -- (T._object'Access, -- Object | |
2696 | -- Protected_Entry_Index! (I), -- E | |
2697 | -- P, -- Uninterpreted_Data | |
2698 | -- Conditional_Call, -- Mode | |
2699 | -- Bnn); -- Block | |
e1c20931 | 2700 | |
acf97c11 | 2701 | -- where T is the protected object, I is the entry index, P |
2702 | -- are the wrapped parameters and Bnn is the name of the | |
2703 | -- communication block. | |
d62940bf | 2704 | |
acf97c11 | 2705 | Append_To (Stmts, |
2706 | Make_Procedure_Call_Statement (Loc, | |
02a2406d | 2707 | Name => |
83c6c069 | 2708 | New_Occurrence_Of (RTE (RE_Protected_Entry_Call), Loc), |
02a2406d | 2709 | Parameter_Associations => New_List ( |
acf97c11 | 2710 | Obj_Ref, |
d62940bf | 2711 | |
acf97c11 | 2712 | Make_Unchecked_Type_Conversion (Loc, -- entry index |
2713 | Subtype_Mark => | |
83c6c069 | 2714 | New_Occurrence_Of |
acf97c11 | 2715 | (RTE (RE_Protected_Entry_Index), Loc), |
2716 | Expression => Make_Identifier (Loc, Name_uI)), | |
2717 | ||
2718 | Make_Identifier (Loc, Name_uP), -- parameter block | |
2719 | ||
83c6c069 | 2720 | New_Occurrence_Of -- Conditional_Call |
2721 | (RTE (RE_Conditional_Call), Loc), | |
2722 | New_Occurrence_Of -- Bnn | |
2723 | (Blk_Nam, Loc)))); | |
acf97c11 | 2724 | |
2725 | when System_Tasking_Protected_Objects_Single_Entry => | |
2726 | ||
2727 | -- If we are compiling for a restricted run-time, the call | |
2728 | -- uses the simpler form. | |
2729 | ||
2730 | Append_To (Stmts, | |
2731 | Make_Procedure_Call_Statement (Loc, | |
02a2406d | 2732 | Name => |
83c6c069 | 2733 | New_Occurrence_Of |
acf97c11 | 2734 | (RTE (RE_Protected_Single_Entry_Call), Loc), |
02a2406d | 2735 | Parameter_Associations => New_List ( |
acf97c11 | 2736 | Obj_Ref, |
2737 | ||
2738 | Make_Attribute_Reference (Loc, | |
55868293 | 2739 | Prefix => Make_Identifier (Loc, Name_uP), |
acf97c11 | 2740 | Attribute_Name => Name_Address), |
2741 | ||
83c6c069 | 2742 | New_Occurrence_Of |
acf97c11 | 2743 | (RTE (RE_Conditional_Call), Loc)))); |
2744 | when others => | |
2745 | raise Program_Error; | |
2746 | end case; | |
d62940bf | 2747 | |
76a1c25b | 2748 | -- Generate: |
2749 | -- F := not Cancelled (Bnn); | |
e1c20931 | 2750 | |
76a1c25b | 2751 | -- where F is the success flag. The status of Cancelled is negated |
67cf9b55 | 2752 | -- in order to match the behavior of the version for task types. |
e1c20931 | 2753 | |
76a1c25b | 2754 | Append_To (Stmts, |
2755 | Make_Assignment_Statement (Loc, | |
55868293 | 2756 | Name => Make_Identifier (Loc, Name_uF), |
76a1c25b | 2757 | Expression => |
2758 | Make_Op_Not (Loc, | |
2759 | Right_Opnd => | |
2760 | Make_Function_Call (Loc, | |
02a2406d | 2761 | Name => |
83c6c069 | 2762 | New_Occurrence_Of (RTE (RE_Cancelled), Loc), |
02a2406d | 2763 | Parameter_Associations => New_List ( |
83c6c069 | 2764 | New_Occurrence_Of (Blk_Nam, Loc)))))); |
76a1c25b | 2765 | else |
2766 | pragma Assert (Ekind (Conc_Typ) = E_Task_Type); | |
d62940bf | 2767 | |
76a1c25b | 2768 | -- Generate: |
cdb1c38f | 2769 | -- Task_Entry_Call |
2770 | -- (T._task_id, -- Acceptor | |
2771 | -- Task_Entry_Index! (I), -- E | |
2772 | -- P, -- Uninterpreted_Data | |
2773 | -- Conditional_Call, -- Mode | |
2774 | -- F); -- Rendezvous_Successful | |
d62940bf | 2775 | |
76a1c25b | 2776 | -- where T is the task object, I is the entry index, P are the |
2777 | -- wrapped parameters and F is the status flag. | |
e1c20931 | 2778 | |
76a1c25b | 2779 | Append_To (Stmts, |
2780 | Make_Procedure_Call_Statement (Loc, | |
02a2406d | 2781 | Name => |
83c6c069 | 2782 | New_Occurrence_Of (RTE (RE_Task_Entry_Call), Loc), |
02a2406d | 2783 | Parameter_Associations => New_List ( |
76a1c25b | 2784 | |
2785 | Make_Selected_Component (Loc, -- T._task_id | |
55868293 | 2786 | Prefix => Make_Identifier (Loc, Name_uT), |
2787 | Selector_Name => Make_Identifier (Loc, Name_uTask_Id)), | |
76a1c25b | 2788 | |
2789 | Make_Unchecked_Type_Conversion (Loc, -- entry index | |
2790 | Subtype_Mark => | |
83c6c069 | 2791 | New_Occurrence_Of (RTE (RE_Task_Entry_Index), Loc), |
55868293 | 2792 | Expression => Make_Identifier (Loc, Name_uI)), |
76a1c25b | 2793 | |
2794 | Make_Identifier (Loc, Name_uP), -- parameter block | |
83c6c069 | 2795 | New_Occurrence_Of -- Conditional_Call |
55868293 | 2796 | (RTE (RE_Conditional_Call), Loc), |
76a1c25b | 2797 | Make_Identifier (Loc, Name_uF)))); -- status flag |
d62940bf | 2798 | end if; |
7c949aad | 2799 | |
2800 | else | |
a053db0d | 2801 | -- Initialize out parameters |
7c949aad | 2802 | |
a053db0d | 2803 | Append_To (Stmts, |
2804 | Make_Assignment_Statement (Loc, | |
aabafdc2 | 2805 | Name => Make_Identifier (Loc, Name_uF), |
83c6c069 | 2806 | Expression => New_Occurrence_Of (Standard_False, Loc))); |
a053db0d | 2807 | Append_To (Stmts, |
2808 | Make_Assignment_Statement (Loc, | |
aabafdc2 | 2809 | Name => Make_Identifier (Loc, Name_uC), |
83c6c069 | 2810 | Expression => New_Occurrence_Of (RTE (RE_POK_Function), Loc))); |
76a1c25b | 2811 | end if; |
2812 | ||
2813 | return | |
2814 | Make_Subprogram_Body (Loc, | |
aabafdc2 | 2815 | Specification => |
76a1c25b | 2816 | Make_Disp_Conditional_Select_Spec (Typ), |
aabafdc2 | 2817 | Declarations => Decls, |
76a1c25b | 2818 | Handled_Statement_Sequence => |
2819 | Make_Handled_Sequence_Of_Statements (Loc, Stmts)); | |
2820 | end Make_Disp_Conditional_Select_Body; | |
2821 | ||
2822 | --------------------------------------- | |
2823 | -- Make_Disp_Conditional_Select_Spec -- | |
2824 | --------------------------------------- | |
2825 | ||
2826 | function Make_Disp_Conditional_Select_Spec | |
2827 | (Typ : Entity_Id) return Node_Id | |
2828 | is | |
2829 | Loc : constant Source_Ptr := Sloc (Typ); | |
2830 | Def_Id : constant Node_Id := | |
2831 | Make_Defining_Identifier (Loc, | |
2832 | Name_uDisp_Conditional_Select); | |
2833 | Params : constant List_Id := New_List; | |
2834 | ||
2835 | begin | |
68f95949 | 2836 | pragma Assert (not Restriction_Active (No_Dispatching_Calls)); |
2837 | ||
725a69d2 | 2838 | -- T : in out Typ; -- Object parameter |
2839 | -- S : Integer; -- Primitive operation slot | |
2840 | -- P : Address; -- Wrapped parameters | |
2841 | -- C : out Prim_Op_Kind; -- Call kind | |
2842 | -- F : out Boolean; -- Status flag | |
2843 | ||
2844 | Append_List_To (Params, New_List ( | |
2845 | ||
2846 | Make_Parameter_Specification (Loc, | |
02a2406d | 2847 | Defining_Identifier => Make_Defining_Identifier (Loc, Name_uT), |
2848 | Parameter_Type => New_Occurrence_Of (Typ, Loc), | |
2849 | In_Present => True, | |
2850 | Out_Present => True), | |
725a69d2 | 2851 | |
2852 | Make_Parameter_Specification (Loc, | |
02a2406d | 2853 | Defining_Identifier => Make_Defining_Identifier (Loc, Name_uS), |
2854 | Parameter_Type => New_Occurrence_Of (Standard_Integer, Loc)), | |
725a69d2 | 2855 | |
2856 | Make_Parameter_Specification (Loc, | |
02a2406d | 2857 | Defining_Identifier => Make_Defining_Identifier (Loc, Name_uP), |
2858 | Parameter_Type => New_Occurrence_Of (RTE (RE_Address), Loc)), | |
76a1c25b | 2859 | |
725a69d2 | 2860 | Make_Parameter_Specification (Loc, |
02a2406d | 2861 | Defining_Identifier => Make_Defining_Identifier (Loc, Name_uC), |
2862 | Parameter_Type => | |
83c6c069 | 2863 | New_Occurrence_Of (RTE (RE_Prim_Op_Kind), Loc), |
02a2406d | 2864 | Out_Present => True), |
76a1c25b | 2865 | |
725a69d2 | 2866 | Make_Parameter_Specification (Loc, |
02a2406d | 2867 | Defining_Identifier => Make_Defining_Identifier (Loc, Name_uF), |
2868 | Parameter_Type => New_Occurrence_Of (Standard_Boolean, Loc), | |
2869 | Out_Present => True))); | |
76a1c25b | 2870 | |
2871 | return | |
2872 | Make_Procedure_Specification (Loc, | |
2873 | Defining_Unit_Name => Def_Id, | |
2874 | Parameter_Specifications => Params); | |
2875 | end Make_Disp_Conditional_Select_Spec; | |
2876 | ||
2877 | ------------------------------------- | |
2878 | -- Make_Disp_Get_Prim_Op_Kind_Body -- | |
2879 | ------------------------------------- | |
2880 | ||
02a2406d | 2881 | function Make_Disp_Get_Prim_Op_Kind_Body (Typ : Entity_Id) return Node_Id is |
bf7f5966 | 2882 | Loc : constant Source_Ptr := Sloc (Typ); |
2883 | Tag_Node : Node_Id; | |
76a1c25b | 2884 | |
2885 | begin | |
68f95949 | 2886 | pragma Assert (not Restriction_Active (No_Dispatching_Calls)); |
2887 | ||
76a1c25b | 2888 | if Is_Interface (Typ) then |
2889 | return | |
2890 | Make_Subprogram_Body (Loc, | |
02a2406d | 2891 | Specification => |
76a1c25b | 2892 | Make_Disp_Get_Prim_Op_Kind_Spec (Typ), |
02a2406d | 2893 | Declarations => New_List, |
76a1c25b | 2894 | Handled_Statement_Sequence => |
2895 | Make_Handled_Sequence_Of_Statements (Loc, | |
2896 | New_List (Make_Null_Statement (Loc)))); | |
e1c20931 | 2897 | end if; |
2898 | ||
d62940bf | 2899 | -- Generate: |
76a1c25b | 2900 | -- C := get_prim_op_kind (tag! (<type>VP), S); |
ee6ba406 | 2901 | |
76a1c25b | 2902 | -- where C is the out parameter capturing the call kind and S is the |
2903 | -- dispatch table slot number. | |
ee6ba406 | 2904 | |
bf7f5966 | 2905 | if Tagged_Type_Expansion then |
2906 | Tag_Node := | |
2907 | Unchecked_Convert_To (RTE (RE_Tag), | |
83c6c069 | 2908 | New_Occurrence_Of |
bf7f5966 | 2909 | (Node (First_Elmt (Access_Disp_Table (Typ))), Loc)); |
2910 | ||
2911 | else | |
2912 | Tag_Node := | |
2913 | Make_Attribute_Reference (Loc, | |
02a2406d | 2914 | Prefix => New_Occurrence_Of (Typ, Loc), |
bf7f5966 | 2915 | Attribute_Name => Name_Tag); |
2916 | end if; | |
2917 | ||
76a1c25b | 2918 | return |
2919 | Make_Subprogram_Body (Loc, | |
02a2406d | 2920 | Specification => |
76a1c25b | 2921 | Make_Disp_Get_Prim_Op_Kind_Spec (Typ), |
02a2406d | 2922 | Declarations => New_List, |
76a1c25b | 2923 | Handled_Statement_Sequence => |
2924 | Make_Handled_Sequence_Of_Statements (Loc, | |
2925 | New_List ( | |
2926 | Make_Assignment_Statement (Loc, | |
02a2406d | 2927 | Name => Make_Identifier (Loc, Name_uC), |
76a1c25b | 2928 | Expression => |
725a69d2 | 2929 | Make_Function_Call (Loc, |
2930 | Name => | |
83c6c069 | 2931 | New_Occurrence_Of (RTE (RE_Get_Prim_Op_Kind), Loc), |
725a69d2 | 2932 | Parameter_Associations => New_List ( |
bf7f5966 | 2933 | Tag_Node, |
2934 | Make_Identifier (Loc, Name_uS))))))); | |
76a1c25b | 2935 | end Make_Disp_Get_Prim_Op_Kind_Body; |
e1c20931 | 2936 | |
76a1c25b | 2937 | ------------------------------------- |
2938 | -- Make_Disp_Get_Prim_Op_Kind_Spec -- | |
2939 | ------------------------------------- | |
e1c20931 | 2940 | |
76a1c25b | 2941 | function Make_Disp_Get_Prim_Op_Kind_Spec |
2942 | (Typ : Entity_Id) return Node_Id | |
2943 | is | |
2944 | Loc : constant Source_Ptr := Sloc (Typ); | |
2945 | Def_Id : constant Node_Id := | |
02a2406d | 2946 | Make_Defining_Identifier (Loc, Name_uDisp_Get_Prim_Op_Kind); |
76a1c25b | 2947 | Params : constant List_Id := New_List; |
e1c20931 | 2948 | |
76a1c25b | 2949 | begin |
68f95949 | 2950 | pragma Assert (not Restriction_Active (No_Dispatching_Calls)); |
2951 | ||
725a69d2 | 2952 | -- T : in out Typ; -- Object parameter |
2953 | -- S : Integer; -- Primitive operation slot | |
2954 | -- C : out Prim_Op_Kind; -- Call kind | |
2955 | ||
2956 | Append_List_To (Params, New_List ( | |
2957 | ||
2958 | Make_Parameter_Specification (Loc, | |
02a2406d | 2959 | Defining_Identifier => Make_Defining_Identifier (Loc, Name_uT), |
2960 | Parameter_Type => New_Occurrence_Of (Typ, Loc), | |
2961 | In_Present => True, | |
2962 | Out_Present => True), | |
ee6ba406 | 2963 | |
725a69d2 | 2964 | Make_Parameter_Specification (Loc, |
02a2406d | 2965 | Defining_Identifier => Make_Defining_Identifier (Loc, Name_uS), |
2966 | Parameter_Type => New_Occurrence_Of (Standard_Integer, Loc)), | |
ee6ba406 | 2967 | |
725a69d2 | 2968 | Make_Parameter_Specification (Loc, |
02a2406d | 2969 | Defining_Identifier => Make_Defining_Identifier (Loc, Name_uC), |
2970 | Parameter_Type => | |
83c6c069 | 2971 | New_Occurrence_Of (RTE (RE_Prim_Op_Kind), Loc), |
02a2406d | 2972 | Out_Present => True))); |
76a1c25b | 2973 | |
2974 | return | |
2975 | Make_Procedure_Specification (Loc, | |
2976 | Defining_Unit_Name => Def_Id, | |
2977 | Parameter_Specifications => Params); | |
2978 | end Make_Disp_Get_Prim_Op_Kind_Spec; | |
2979 | ||
2980 | -------------------------------- | |
2981 | -- Make_Disp_Get_Task_Id_Body -- | |
2982 | -------------------------------- | |
2983 | ||
2984 | function Make_Disp_Get_Task_Id_Body | |
2985 | (Typ : Entity_Id) return Node_Id | |
2986 | is | |
2987 | Loc : constant Source_Ptr := Sloc (Typ); | |
2988 | Ret : Node_Id; | |
2989 | ||
2990 | begin | |
68f95949 | 2991 | pragma Assert (not Restriction_Active (No_Dispatching_Calls)); |
2992 | ||
76a1c25b | 2993 | if Is_Concurrent_Record_Type (Typ) |
2994 | and then Ekind (Corresponding_Concurrent_Type (Typ)) = E_Task_Type | |
2995 | then | |
725a69d2 | 2996 | -- Generate: |
2997 | -- return To_Address (_T._task_id); | |
2998 | ||
76a1c25b | 2999 | Ret := |
17e14451 | 3000 | Make_Simple_Return_Statement (Loc, |
76a1c25b | 3001 | Expression => |
725a69d2 | 3002 | Make_Unchecked_Type_Conversion (Loc, |
02a2406d | 3003 | Subtype_Mark => New_Occurrence_Of (RTE (RE_Address), Loc), |
3004 | Expression => | |
725a69d2 | 3005 | Make_Selected_Component (Loc, |
55868293 | 3006 | Prefix => Make_Identifier (Loc, Name_uT), |
3007 | Selector_Name => Make_Identifier (Loc, Name_uTask_Id)))); | |
76a1c25b | 3008 | |
3009 | -- A null body is constructed for non-task types | |
3010 | ||
3011 | else | |
725a69d2 | 3012 | -- Generate: |
3013 | -- return Null_Address; | |
3014 | ||
76a1c25b | 3015 | Ret := |
17e14451 | 3016 | Make_Simple_Return_Statement (Loc, |
02a2406d | 3017 | Expression => New_Occurrence_Of (RTE (RE_Null_Address), Loc)); |
76a1c25b | 3018 | end if; |
3019 | ||
3020 | return | |
3021 | Make_Subprogram_Body (Loc, | |
02a2406d | 3022 | Specification => Make_Disp_Get_Task_Id_Spec (Typ), |
3023 | Declarations => New_List, | |
76a1c25b | 3024 | Handled_Statement_Sequence => |
02a2406d | 3025 | Make_Handled_Sequence_Of_Statements (Loc, New_List (Ret))); |
76a1c25b | 3026 | end Make_Disp_Get_Task_Id_Body; |
3027 | ||
3028 | -------------------------------- | |
3029 | -- Make_Disp_Get_Task_Id_Spec -- | |
3030 | -------------------------------- | |
3031 | ||
3032 | function Make_Disp_Get_Task_Id_Spec | |
3033 | (Typ : Entity_Id) return Node_Id | |
3034 | is | |
725a69d2 | 3035 | Loc : constant Source_Ptr := Sloc (Typ); |
76a1c25b | 3036 | |
3037 | begin | |
68f95949 | 3038 | pragma Assert (not Restriction_Active (No_Dispatching_Calls)); |
3039 | ||
76a1c25b | 3040 | return |
3041 | Make_Function_Specification (Loc, | |
02a2406d | 3042 | Defining_Unit_Name => |
725a69d2 | 3043 | Make_Defining_Identifier (Loc, Name_uDisp_Get_Task_Id), |
76a1c25b | 3044 | Parameter_Specifications => New_List ( |
3045 | Make_Parameter_Specification (Loc, | |
02a2406d | 3046 | Defining_Identifier => Make_Defining_Identifier (Loc, Name_uT), |
3047 | Parameter_Type => New_Occurrence_Of (Typ, Loc))), | |
3048 | Result_Definition => | |
83c6c069 | 3049 | New_Occurrence_Of (RTE (RE_Address), Loc)); |
76a1c25b | 3050 | end Make_Disp_Get_Task_Id_Spec; |
3051 | ||
cdb1c38f | 3052 | ---------------------------- |
3053 | -- Make_Disp_Requeue_Body -- | |
3054 | ---------------------------- | |
3055 | ||
3056 | function Make_Disp_Requeue_Body | |
3057 | (Typ : Entity_Id) return Node_Id | |
3058 | is | |
3059 | Loc : constant Source_Ptr := Sloc (Typ); | |
3060 | Conc_Typ : Entity_Id := Empty; | |
3061 | Stmts : constant List_Id := New_List; | |
3062 | ||
3063 | begin | |
3064 | pragma Assert (not Restriction_Active (No_Dispatching_Calls)); | |
3065 | ||
3066 | -- Null body is generated for interface types and non-concurrent | |
3067 | -- tagged types. | |
3068 | ||
3069 | if Is_Interface (Typ) | |
3070 | or else not Is_Concurrent_Record_Type (Typ) | |
3071 | then | |
3072 | return | |
3073 | Make_Subprogram_Body (Loc, | |
02a2406d | 3074 | Specification => Make_Disp_Requeue_Spec (Typ), |
3075 | Declarations => No_List, | |
cdb1c38f | 3076 | Handled_Statement_Sequence => |
3077 | Make_Handled_Sequence_Of_Statements (Loc, | |
3078 | New_List (Make_Null_Statement (Loc)))); | |
3079 | end if; | |
3080 | ||
3081 | Conc_Typ := Corresponding_Concurrent_Type (Typ); | |
3082 | ||
3083 | if Ekind (Conc_Typ) = E_Protected_Type then | |
3084 | ||
3085 | -- Generate statements: | |
3086 | -- if F then | |
3087 | -- System.Tasking.Protected_Objects.Operations. | |
3088 | -- Requeue_Protected_Entry | |
3089 | -- (Protection_Entries_Access (P), | |
3090 | -- O._object'Unchecked_Access, | |
3091 | -- Protected_Entry_Index (I), | |
3092 | -- A); | |
3093 | -- else | |
3094 | -- System.Tasking.Protected_Objects.Operations. | |
3095 | -- Requeue_Task_To_Protected_Entry | |
3096 | -- (O._object'Unchecked_Access, | |
3097 | -- Protected_Entry_Index (I), | |
3098 | -- A); | |
3099 | -- end if; | |
3100 | ||
acf97c11 | 3101 | if Restriction_Active (No_Entry_Queue) then |
3102 | Append_To (Stmts, Make_Null_Statement (Loc)); | |
3103 | else | |
3104 | Append_To (Stmts, | |
3105 | Make_If_Statement (Loc, | |
55868293 | 3106 | Condition => Make_Identifier (Loc, Name_uF), |
cdb1c38f | 3107 | |
acf97c11 | 3108 | Then_Statements => |
3109 | New_List ( | |
cdb1c38f | 3110 | |
acf97c11 | 3111 | -- Call to Requeue_Protected_Entry |
cdb1c38f | 3112 | |
acf97c11 | 3113 | Make_Procedure_Call_Statement (Loc, |
3114 | Name => | |
02a2406d | 3115 | New_Occurrence_Of |
3116 | (RTE (RE_Requeue_Protected_Entry), Loc), | |
acf97c11 | 3117 | Parameter_Associations => |
3118 | New_List ( | |
3119 | ||
3120 | Make_Unchecked_Type_Conversion (Loc, -- PEA (P) | |
3121 | Subtype_Mark => | |
83c6c069 | 3122 | New_Occurrence_Of ( |
acf97c11 | 3123 | RTE (RE_Protection_Entries_Access), Loc), |
3124 | Expression => | |
3125 | Make_Identifier (Loc, Name_uP)), | |
3126 | ||
3127 | Make_Attribute_Reference (Loc, -- O._object'Acc | |
3128 | Attribute_Name => | |
3129 | Name_Unchecked_Access, | |
02a2406d | 3130 | Prefix => |
acf97c11 | 3131 | Make_Selected_Component (Loc, |
55868293 | 3132 | Prefix => |
acf97c11 | 3133 | Make_Identifier (Loc, Name_uO), |
3134 | Selector_Name => | |
3135 | Make_Identifier (Loc, Name_uObject))), | |
3136 | ||
3137 | Make_Unchecked_Type_Conversion (Loc, -- entry index | |
3138 | Subtype_Mark => | |
02a2406d | 3139 | New_Occurrence_Of |
3140 | (RTE (RE_Protected_Entry_Index), Loc), | |
55868293 | 3141 | Expression => Make_Identifier (Loc, Name_uI)), |
cdb1c38f | 3142 | |
acf97c11 | 3143 | Make_Identifier (Loc, Name_uA)))), -- abort status |
cdb1c38f | 3144 | |
acf97c11 | 3145 | Else_Statements => |
3146 | New_List ( | |
cdb1c38f | 3147 | |
acf97c11 | 3148 | -- Call to Requeue_Task_To_Protected_Entry |
cdb1c38f | 3149 | |
acf97c11 | 3150 | Make_Procedure_Call_Statement (Loc, |
3151 | Name => | |
02a2406d | 3152 | New_Occurrence_Of |
3153 | (RTE (RE_Requeue_Task_To_Protected_Entry), Loc), | |
acf97c11 | 3154 | Parameter_Associations => |
3155 | New_List ( | |
3156 | ||
3157 | Make_Attribute_Reference (Loc, -- O._object'Acc | |
02a2406d | 3158 | Attribute_Name => Name_Unchecked_Access, |
3159 | Prefix => | |
acf97c11 | 3160 | Make_Selected_Component (Loc, |
02a2406d | 3161 | Prefix => |
acf97c11 | 3162 | Make_Identifier (Loc, Name_uO), |
3163 | Selector_Name => | |
3164 | Make_Identifier (Loc, Name_uObject))), | |
3165 | ||
3166 | Make_Unchecked_Type_Conversion (Loc, -- entry index | |
3167 | Subtype_Mark => | |
02a2406d | 3168 | New_Occurrence_Of |
3169 | (RTE (RE_Protected_Entry_Index), Loc), | |
3170 | Expression => Make_Identifier (Loc, Name_uI)), | |
cdb1c38f | 3171 | |
acf97c11 | 3172 | Make_Identifier (Loc, Name_uA)))))); -- abort status |
3173 | end if; | |
02a2406d | 3174 | |
cdb1c38f | 3175 | else |
3176 | pragma Assert (Is_Task_Type (Conc_Typ)); | |
3177 | ||
3178 | -- Generate: | |
3179 | -- if F then | |
3180 | -- System.Tasking.Rendezvous.Requeue_Protected_To_Task_Entry | |
3181 | -- (Protection_Entries_Access (P), | |
3182 | -- O._task_id, | |
3183 | -- Task_Entry_Index (I), | |
3184 | -- A); | |
3185 | -- else | |
3186 | -- System.Tasking.Rendezvous.Requeue_Task_Entry | |
3187 | -- (O._task_id, | |
3188 | -- Task_Entry_Index (I), | |
3189 | -- A); | |
3190 | -- end if; | |
3191 | ||
3192 | Append_To (Stmts, | |
3193 | Make_If_Statement (Loc, | |
55868293 | 3194 | Condition => Make_Identifier (Loc, Name_uF), |
cdb1c38f | 3195 | |
55868293 | 3196 | Then_Statements => New_List ( |
cdb1c38f | 3197 | |
55868293 | 3198 | -- Call to Requeue_Protected_To_Task_Entry |
cdb1c38f | 3199 | |
55868293 | 3200 | Make_Procedure_Call_Statement (Loc, |
3201 | Name => | |
83c6c069 | 3202 | New_Occurrence_Of |
55868293 | 3203 | (RTE (RE_Requeue_Protected_To_Task_Entry), Loc), |
cdb1c38f | 3204 | |
55868293 | 3205 | Parameter_Associations => New_List ( |
cdb1c38f | 3206 | |
55868293 | 3207 | Make_Unchecked_Type_Conversion (Loc, -- PEA (P) |
3208 | Subtype_Mark => | |
83c6c069 | 3209 | New_Occurrence_Of |
55868293 | 3210 | (RTE (RE_Protection_Entries_Access), Loc), |
3211 | Expression => Make_Identifier (Loc, Name_uP)), | |
cdb1c38f | 3212 | |
55868293 | 3213 | Make_Selected_Component (Loc, -- O._task_id |
3214 | Prefix => Make_Identifier (Loc, Name_uO), | |
3215 | Selector_Name => Make_Identifier (Loc, Name_uTask_Id)), | |
cdb1c38f | 3216 | |
55868293 | 3217 | Make_Unchecked_Type_Conversion (Loc, -- entry index |
3218 | Subtype_Mark => | |
83c6c069 | 3219 | New_Occurrence_Of (RTE (RE_Task_Entry_Index), Loc), |
55868293 | 3220 | Expression => Make_Identifier (Loc, Name_uI)), |
cdb1c38f | 3221 | |
55868293 | 3222 | Make_Identifier (Loc, Name_uA)))), -- abort status |
cdb1c38f | 3223 | |
55868293 | 3224 | Else_Statements => New_List ( |
cdb1c38f | 3225 | |
55868293 | 3226 | -- Call to Requeue_Task_Entry |
cdb1c38f | 3227 | |
55868293 | 3228 | Make_Procedure_Call_Statement (Loc, |
02a2406d | 3229 | Name => |
3230 | New_Occurrence_Of (RTE (RE_Requeue_Task_Entry), Loc), | |
cdb1c38f | 3231 | |
55868293 | 3232 | Parameter_Associations => New_List ( |
cdb1c38f | 3233 | |
55868293 | 3234 | Make_Selected_Component (Loc, -- O._task_id |
3235 | Prefix => Make_Identifier (Loc, Name_uO), | |
3236 | Selector_Name => Make_Identifier (Loc, Name_uTask_Id)), | |
cdb1c38f | 3237 | |
55868293 | 3238 | Make_Unchecked_Type_Conversion (Loc, -- entry index |
3239 | Subtype_Mark => | |
83c6c069 | 3240 | New_Occurrence_Of (RTE (RE_Task_Entry_Index), Loc), |
55868293 | 3241 | Expression => Make_Identifier (Loc, Name_uI)), |
cdb1c38f | 3242 | |
55868293 | 3243 | Make_Identifier (Loc, Name_uA)))))); -- abort status |
cdb1c38f | 3244 | end if; |
3245 | ||
3246 | -- Even though no declarations are needed in both cases, we allocate | |
3247 | -- a list for entities added by Freeze. | |
3248 | ||
3249 | return | |
3250 | Make_Subprogram_Body (Loc, | |
02a2406d | 3251 | Specification => Make_Disp_Requeue_Spec (Typ), |
3252 | Declarations => New_List, | |
cdb1c38f | 3253 | Handled_Statement_Sequence => |
3254 | Make_Handled_Sequence_Of_Statements (Loc, Stmts)); | |
3255 | end Make_Disp_Requeue_Body; | |
3256 | ||
3257 | ---------------------------- | |
3258 | -- Make_Disp_Requeue_Spec -- | |
3259 | ---------------------------- | |
3260 | ||
3261 | function Make_Disp_Requeue_Spec | |
3262 | (Typ : Entity_Id) return Node_Id | |
3263 | is | |
3264 | Loc : constant Source_Ptr := Sloc (Typ); | |
3265 | ||
3266 | begin | |
3267 | pragma Assert (not Restriction_Active (No_Dispatching_Calls)); | |
3268 | ||
3269 | -- O : in out Typ; - Object parameter | |
3270 | -- F : Boolean; - Protected (True) / task (False) flag | |
3271 | -- P : Address; - Protection_Entries_Access value | |
3272 | -- I : Entry_Index - Index of entry call | |
3273 | -- A : Boolean - Abort flag | |
3274 | ||
3275 | -- Note that the Protection_Entries_Access value is represented as a | |
3276 | -- System.Address in order to avoid dragging in the tasking runtime | |
3277 | -- when compiling sources without tasking constructs. | |
3278 | ||
3279 | return | |
3280 | Make_Procedure_Specification (Loc, | |
3281 | Defining_Unit_Name => | |
3282 | Make_Defining_Identifier (Loc, Name_uDisp_Requeue), | |
3283 | ||
02a2406d | 3284 | Parameter_Specifications => New_List ( |
cdb1c38f | 3285 | |
3286 | Make_Parameter_Specification (Loc, -- O | |
3287 | Defining_Identifier => | |
3288 | Make_Defining_Identifier (Loc, Name_uO), | |
02a2406d | 3289 | Parameter_Type => |
83c6c069 | 3290 | New_Occurrence_Of (Typ, Loc), |
02a2406d | 3291 | In_Present => True, |
3292 | Out_Present => True), | |
cdb1c38f | 3293 | |
3294 | Make_Parameter_Specification (Loc, -- F | |
3295 | Defining_Identifier => | |
3296 | Make_Defining_Identifier (Loc, Name_uF), | |
02a2406d | 3297 | Parameter_Type => |
83c6c069 | 3298 | New_Occurrence_Of (Standard_Boolean, Loc)), |
cdb1c38f | 3299 | |
3300 | Make_Parameter_Specification (Loc, -- P | |
3301 | Defining_Identifier => | |
3302 | Make_Defining_Identifier (Loc, Name_uP), | |
02a2406d | 3303 | Parameter_Type => |
83c6c069 | 3304 | New_Occurrence_Of (RTE (RE_Address), Loc)), |
cdb1c38f | 3305 | |
3306 | Make_Parameter_Specification (Loc, -- I | |
3307 | Defining_Identifier => | |
3308 | Make_Defining_Identifier (Loc, Name_uI), | |
02a2406d | 3309 | Parameter_Type => |
83c6c069 | 3310 | New_Occurrence_Of (Standard_Integer, Loc)), |
cdb1c38f | 3311 | |
3312 | Make_Parameter_Specification (Loc, -- A | |
3313 | Defining_Identifier => | |
3314 | Make_Defining_Identifier (Loc, Name_uA), | |
02a2406d | 3315 | Parameter_Type => |
83c6c069 | 3316 | New_Occurrence_Of (Standard_Boolean, Loc)))); |
cdb1c38f | 3317 | end Make_Disp_Requeue_Spec; |
3318 | ||
76a1c25b | 3319 | --------------------------------- |
3320 | -- Make_Disp_Timed_Select_Body -- | |
3321 | --------------------------------- | |
3322 | ||
cdb1c38f | 3323 | -- For interface types, generate: |
3324 | ||
3325 | -- procedure _Disp_Timed_Select | |
3326 | -- (T : in out <Typ>; | |
3327 | -- S : Integer; | |
3328 | -- P : System.Address; | |
3329 | -- D : Duration; | |
3330 | -- M : Integer; | |
3331 | -- C : out Ada.Tags.Prim_Op_Kind; | |
3332 | -- F : out Boolean) | |
3333 | -- is | |
3334 | -- begin | |
a053db0d | 3335 | -- F := False; |
3336 | -- C := Ada.Tags.POK_Function; | |
cdb1c38f | 3337 | -- end _Disp_Timed_Select; |
3338 | ||
3339 | -- For protected types, generate: | |
3340 | ||
3341 | -- procedure _Disp_Timed_Select | |
3342 | -- (T : in out <Typ>; | |
3343 | -- S : Integer; | |
3344 | -- P : System.Address; | |
3345 | -- D : Duration; | |
3346 | -- M : Integer; | |
3347 | -- C : out Ada.Tags.Prim_Op_Kind; | |
3348 | -- F : out Boolean) | |
3349 | -- is | |
3350 | -- I : Integer; | |
3351 | ||
3352 | -- begin | |
3353 | -- C := Ada.Tags.Get_Prim_Op_Kind (Ada.Tags.Tag (<Typ>VP), S); | |
3354 | ||
3355 | -- if C = Ada.Tags.POK_Procedure | |
3356 | -- or else C = Ada.Tags.POK_Protected_Procedure | |
3357 | -- or else C = Ada.Tags.POK_Task_Procedure | |
3358 | -- then | |
3359 | -- F := True; | |
3360 | -- return; | |
3361 | -- end if; | |
3362 | ||
3363 | -- I := Ada.Tags.Get_Entry_Index (Ada.Tags.Tag (<Typ>VP), S); | |
3364 | -- System.Tasking.Protected_Objects.Operations. | |
3365 | -- Timed_Protected_Entry_Call | |
3366 | -- (T._object'Access, | |
3367 | -- System.Tasking.Protected_Objects.Protected_Entry_Index (I), | |
3368 | -- P, | |
3369 | -- D, | |
3370 | -- M, | |
3371 | -- F); | |
3372 | -- end _Disp_Timed_Select; | |
3373 | ||
3374 | -- For task types, generate: | |
3375 | ||
3376 | -- procedure _Disp_Timed_Select | |
3377 | -- (T : in out <Typ>; | |
3378 | -- S : Integer; | |
3379 | -- P : System.Address; | |
3380 | -- D : Duration; | |
3381 | -- M : Integer; | |
3382 | -- C : out Ada.Tags.Prim_Op_Kind; | |
3383 | -- F : out Boolean) | |
3384 | -- is | |
3385 | -- I : Integer; | |
3386 | ||
3387 | -- begin | |
3388 | -- I := Ada.Tags.Get_Entry_Index (Ada.Tags.Tag (<Typ>VP), S); | |
3389 | -- System.Tasking.Rendezvous.Timed_Task_Entry_Call | |
3390 | -- (T._task_id, | |
3391 | -- System.Tasking.Task_Entry_Index (I), | |
3392 | -- P, | |
3393 | -- D, | |
3394 | -- M, | |
a053db0d | 3395 | -- F); |
cdb1c38f | 3396 | -- end _Disp_Time_Select; |
3397 | ||
76a1c25b | 3398 | function Make_Disp_Timed_Select_Body |
3399 | (Typ : Entity_Id) return Node_Id | |
3400 | is | |
3401 | Loc : constant Source_Ptr := Sloc (Typ); | |
3402 | Conc_Typ : Entity_Id := Empty; | |
3403 | Decls : constant List_Id := New_List; | |
acf97c11 | 3404 | Obj_Ref : Node_Id; |
76a1c25b | 3405 | Stmts : constant List_Id := New_List; |
bf7f5966 | 3406 | Tag_Node : Node_Id; |
76a1c25b | 3407 | |
3408 | begin | |
68f95949 | 3409 | pragma Assert (not Restriction_Active (No_Dispatching_Calls)); |
3410 | ||
952af0b9 | 3411 | -- Null body is generated for interface types |
3412 | ||
76a1c25b | 3413 | if Is_Interface (Typ) then |
3414 | return | |
3415 | Make_Subprogram_Body (Loc, | |
02a2406d | 3416 | Specification => Make_Disp_Timed_Select_Spec (Typ), |
3417 | Declarations => New_List, | |
76a1c25b | 3418 | Handled_Statement_Sequence => |
3419 | Make_Handled_Sequence_Of_Statements (Loc, | |
aabafdc2 | 3420 | New_List ( |
3421 | Make_Assignment_Statement (Loc, | |
3422 | Name => Make_Identifier (Loc, Name_uF), | |
83c6c069 | 3423 | Expression => New_Occurrence_Of (Standard_False, Loc))))); |
76a1c25b | 3424 | end if; |
3425 | ||
952af0b9 | 3426 | if Is_Concurrent_Record_Type (Typ) then |
3427 | Conc_Typ := Corresponding_Concurrent_Type (Typ); | |
76a1c25b | 3428 | |
3429 | -- Generate: | |
3430 | -- I : Integer; | |
3431 | ||
3432 | -- where I will be used to capture the entry index of the primitive | |
3433 | -- wrapper at position S. | |
3434 | ||
3435 | Append_To (Decls, | |
3436 | Make_Object_Declaration (Loc, | |
aabafdc2 | 3437 | Defining_Identifier => Make_Defining_Identifier (Loc, Name_uI), |
83c6c069 | 3438 | Object_Definition => |
3439 | New_Occurrence_Of (Standard_Integer, Loc))); | |
76a1c25b | 3440 | |
952af0b9 | 3441 | -- Generate: |
3442 | -- C := Get_Prim_Op_Kind (tag! (<type>VP), S); | |
76a1c25b | 3443 | |
952af0b9 | 3444 | -- if C = POK_Procedure |
3445 | -- or else C = POK_Protected_Procedure | |
3446 | -- or else C = POK_Task_Procedure; | |
3447 | -- then | |
3448 | -- F := True; | |
3449 | -- return; | |
3450 | -- end if; | |
76a1c25b | 3451 | |
e58ae6f1 | 3452 | Build_Common_Dispatching_Select_Statements (Typ, Stmts); |
76a1c25b | 3453 | |
3454 | -- Generate: | |
952af0b9 | 3455 | -- I := Get_Entry_Index (tag! (<type>VP), S); |
76a1c25b | 3456 | |
3457 | -- I is the entry index and S is the dispatch table slot | |
3458 | ||
bf7f5966 | 3459 | if Tagged_Type_Expansion then |
3460 | Tag_Node := | |
3461 | Unchecked_Convert_To (RTE (RE_Tag), | |
83c6c069 | 3462 | New_Occurrence_Of |
bf7f5966 | 3463 | (Node (First_Elmt (Access_Disp_Table (Typ))), Loc)); |
3464 | ||
3465 | else | |
3466 | Tag_Node := | |
3467 | Make_Attribute_Reference (Loc, | |
83c6c069 | 3468 | Prefix => New_Occurrence_Of (Typ, Loc), |
bf7f5966 | 3469 | Attribute_Name => Name_Tag); |
3470 | end if; | |
3471 | ||
76a1c25b | 3472 | Append_To (Stmts, |
3473 | Make_Assignment_Statement (Loc, | |
55868293 | 3474 | Name => Make_Identifier (Loc, Name_uI), |
76a1c25b | 3475 | Expression => |
725a69d2 | 3476 | Make_Function_Call (Loc, |
83c6c069 | 3477 | Name => New_Occurrence_Of (RTE (RE_Get_Entry_Index), Loc), |
02a2406d | 3478 | Parameter_Associations => New_List ( |
3479 | Tag_Node, | |
3480 | Make_Identifier (Loc, Name_uS))))); | |
76a1c25b | 3481 | |
acf97c11 | 3482 | -- Protected case |
3483 | ||
76a1c25b | 3484 | if Ekind (Conc_Typ) = E_Protected_Type then |
3485 | ||
acf97c11 | 3486 | -- Build T._object'Access |
3487 | ||
3488 | Obj_Ref := | |
3489 | Make_Attribute_Reference (Loc, | |
3490 | Attribute_Name => Name_Unchecked_Access, | |
3491 | Prefix => | |
3492 | Make_Selected_Component (Loc, | |
3493 | Prefix => Make_Identifier (Loc, Name_uT), | |
3494 | Selector_Name => Make_Identifier (Loc, Name_uObject))); | |
3495 | ||
3496 | -- Normal case, No_Entry_Queue restriction not active. In this | |
3497 | -- case we generate: | |
3498 | ||
3499 | -- Timed_Protected_Entry_Call | |
3500 | -- (T._object'access, | |
cdb1c38f | 3501 | -- Protected_Entry_Index! (I), |
acf97c11 | 3502 | -- P, D, M, F); |
76a1c25b | 3503 | |
3504 | -- where T is the protected object, I is the entry index, P are | |
3505 | -- the wrapped parameters, D is the delay amount, M is the delay | |
3506 | -- mode and F is the status flag. | |
3507 | ||
10970cab | 3508 | -- Historically, there was also an implementation for single |
3509 | -- entry protected types (in s-tposen). However, it was removed | |
3510 | -- by also testing for no No_Select_Statements restriction in | |
3511 | -- Exp_Utils.Corresponding_Runtime_Package. This simplified the | |
8dfd0767 | 3512 | -- implementation of s-tposen.adb and provided consistency between |
3513 | -- all versions of System.Tasking.Protected_Objects.Single_Entry | |
3514 | -- (s-tposen*.adb). | |
10970cab | 3515 | |
acf97c11 | 3516 | case Corresponding_Runtime_Package (Conc_Typ) is |
3517 | when System_Tasking_Protected_Objects_Entries => | |
3518 | Append_To (Stmts, | |
3519 | Make_Procedure_Call_Statement (Loc, | |
3520 | Name => | |
83c6c069 | 3521 | New_Occurrence_Of |
acf97c11 | 3522 | (RTE (RE_Timed_Protected_Entry_Call), Loc), |
02a2406d | 3523 | Parameter_Associations => New_List ( |
3524 | Obj_Ref, | |
acf97c11 | 3525 | |
02a2406d | 3526 | Make_Unchecked_Type_Conversion (Loc, -- entry index |
3527 | Subtype_Mark => | |
3528 | New_Occurrence_Of | |
3529 | (RTE (RE_Protected_Entry_Index), Loc), | |
3530 | Expression => Make_Identifier (Loc, Name_uI)), | |
76a1c25b | 3531 | |
99378362 | 3532 | Make_Identifier (Loc, Name_uP), -- parameter block |
3533 | Make_Identifier (Loc, Name_uD), -- delay | |
3534 | Make_Identifier (Loc, Name_uM), -- delay mode | |
02a2406d | 3535 | Make_Identifier (Loc, Name_uF)))); -- status flag |
76a1c25b | 3536 | |
acf97c11 | 3537 | when others => |
3538 | raise Program_Error; | |
3539 | end case; | |
3540 | ||
3541 | -- Task case | |
ee6ba406 | 3542 | |
ee6ba406 | 3543 | else |
76a1c25b | 3544 | pragma Assert (Ekind (Conc_Typ) = E_Task_Type); |
3545 | ||
3546 | -- Generate: | |
3547 | -- Timed_Task_Entry_Call ( | |
3548 | -- T._task_id, | |
cdb1c38f | 3549 | -- Task_Entry_Index! (I), |
76a1c25b | 3550 | -- P, |
3551 | -- D, | |
3552 | -- M, | |
3553 | -- F); | |
3554 | ||
3555 | -- where T is the task object, I is the entry index, P are the | |
3556 | -- wrapped parameters, D is the delay amount, M is the delay | |
3557 | -- mode and F is the status flag. | |
3558 | ||
3559 | Append_To (Stmts, | |
3560 | Make_Procedure_Call_Statement (Loc, | |
02a2406d | 3561 | Name => |
83c6c069 | 3562 | New_Occurrence_Of (RTE (RE_Timed_Task_Entry_Call), Loc), |
76a1c25b | 3563 | |
02a2406d | 3564 | Parameter_Associations => New_List ( |
3565 | Make_Selected_Component (Loc, -- T._task_id | |
3566 | Prefix => Make_Identifier (Loc, Name_uT), | |
3567 | Selector_Name => Make_Identifier (Loc, Name_uTask_Id)), | |
76a1c25b | 3568 | |
02a2406d | 3569 | Make_Unchecked_Type_Conversion (Loc, -- entry index |
3570 | Subtype_Mark => | |
3571 | New_Occurrence_Of (RTE (RE_Task_Entry_Index), Loc), | |
3572 | Expression => Make_Identifier (Loc, Name_uI)), | |
76a1c25b | 3573 | |
02a2406d | 3574 | Make_Identifier (Loc, Name_uP), -- parameter block |
3575 | Make_Identifier (Loc, Name_uD), -- delay | |
3576 | Make_Identifier (Loc, Name_uM), -- delay mode | |
3577 | Make_Identifier (Loc, Name_uF)))); -- status flag | |
ee6ba406 | 3578 | end if; |
7c949aad | 3579 | |
3580 | else | |
a053db0d | 3581 | -- Initialize out parameters |
7c949aad | 3582 | |
a053db0d | 3583 | Append_To (Stmts, |
3584 | Make_Assignment_Statement (Loc, | |
aabafdc2 | 3585 | Name => Make_Identifier (Loc, Name_uF), |
83c6c069 | 3586 | Expression => New_Occurrence_Of (Standard_False, Loc))); |
a053db0d | 3587 | Append_To (Stmts, |
3588 | Make_Assignment_Statement (Loc, | |
aabafdc2 | 3589 | Name => Make_Identifier (Loc, Name_uC), |
83c6c069 | 3590 | Expression => New_Occurrence_Of (RTE (RE_POK_Function), Loc))); |
76a1c25b | 3591 | end if; |
3592 | ||
3593 | return | |
3594 | Make_Subprogram_Body (Loc, | |
aabafdc2 | 3595 | Specification => Make_Disp_Timed_Select_Spec (Typ), |
3596 | Declarations => Decls, | |
76a1c25b | 3597 | Handled_Statement_Sequence => |
3598 | Make_Handled_Sequence_Of_Statements (Loc, Stmts)); | |
3599 | end Make_Disp_Timed_Select_Body; | |
3600 | ||
3601 | --------------------------------- | |
3602 | -- Make_Disp_Timed_Select_Spec -- | |
3603 | --------------------------------- | |
3604 | ||
3605 | function Make_Disp_Timed_Select_Spec | |
3606 | (Typ : Entity_Id) return Node_Id | |
3607 | is | |
3608 | Loc : constant Source_Ptr := Sloc (Typ); | |
3609 | Def_Id : constant Node_Id := | |
3610 | Make_Defining_Identifier (Loc, | |
3611 | Name_uDisp_Timed_Select); | |
3612 | Params : constant List_Id := New_List; | |
ee6ba406 | 3613 | |
76a1c25b | 3614 | begin |
68f95949 | 3615 | pragma Assert (not Restriction_Active (No_Dispatching_Calls)); |
3616 | ||
725a69d2 | 3617 | -- T : in out Typ; -- Object parameter |
3618 | -- S : Integer; -- Primitive operation slot | |
3619 | -- P : Address; -- Wrapped parameters | |
3620 | -- D : Duration; -- Delay | |
3621 | -- M : Integer; -- Delay Mode | |
3622 | -- C : out Prim_Op_Kind; -- Call kind | |
3623 | -- F : out Boolean; -- Status flag | |
76a1c25b | 3624 | |
725a69d2 | 3625 | Append_List_To (Params, New_List ( |
3626 | ||
3627 | Make_Parameter_Specification (Loc, | |
02a2406d | 3628 | Defining_Identifier => Make_Defining_Identifier (Loc, Name_uT), |
3629 | Parameter_Type => New_Occurrence_Of (Typ, Loc), | |
3630 | In_Present => True, | |
3631 | Out_Present => True), | |
725a69d2 | 3632 | |
3633 | Make_Parameter_Specification (Loc, | |
02a2406d | 3634 | Defining_Identifier => Make_Defining_Identifier (Loc, Name_uS), |
3635 | Parameter_Type => New_Occurrence_Of (Standard_Integer, Loc)), | |
725a69d2 | 3636 | |
3637 | Make_Parameter_Specification (Loc, | |
02a2406d | 3638 | Defining_Identifier => Make_Defining_Identifier (Loc, Name_uP), |
3639 | Parameter_Type => New_Occurrence_Of (RTE (RE_Address), Loc)), | |
76a1c25b | 3640 | |
76a1c25b | 3641 | Make_Parameter_Specification (Loc, |
02a2406d | 3642 | Defining_Identifier => Make_Defining_Identifier (Loc, Name_uD), |
3643 | Parameter_Type => New_Occurrence_Of (Standard_Duration, Loc)), | |
76a1c25b | 3644 | |
76a1c25b | 3645 | Make_Parameter_Specification (Loc, |
02a2406d | 3646 | Defining_Identifier => Make_Defining_Identifier (Loc, Name_uM), |
3647 | Parameter_Type => New_Occurrence_Of (Standard_Integer, Loc)), | |
ee6ba406 | 3648 | |
725a69d2 | 3649 | Make_Parameter_Specification (Loc, |
02a2406d | 3650 | Defining_Identifier => Make_Defining_Identifier (Loc, Name_uC), |
3651 | Parameter_Type => | |
83c6c069 | 3652 | New_Occurrence_Of (RTE (RE_Prim_Op_Kind), Loc), |
02a2406d | 3653 | Out_Present => True))); |
ee6ba406 | 3654 | |
725a69d2 | 3655 | Append_To (Params, |
3656 | Make_Parameter_Specification (Loc, | |
02a2406d | 3657 | Defining_Identifier => Make_Defining_Identifier (Loc, Name_uF), |
3658 | Parameter_Type => New_Occurrence_Of (Standard_Boolean, Loc), | |
3659 | Out_Present => True)); | |
ee6ba406 | 3660 | |
76a1c25b | 3661 | return |
3662 | Make_Procedure_Specification (Loc, | |
3663 | Defining_Unit_Name => Def_Id, | |
3664 | Parameter_Specifications => Params); | |
3665 | end Make_Disp_Timed_Select_Spec; | |
ee6ba406 | 3666 | |
76a1c25b | 3667 | ------------- |
3668 | -- Make_DT -- | |
3669 | ------------- | |
ee6ba406 | 3670 | |
725a69d2 | 3671 | -- The frontend supports two models for expanding dispatch tables |
02a2406d | 3672 | -- associated with library-level defined tagged types: statically and |
3673 | -- non-statically allocated dispatch tables. In the former case the object | |
3674 | -- containing the dispatch table is constant and it is initialized by means | |
3675 | -- of a positional aggregate. In the latter case, the object containing | |
3676 | -- the dispatch table is a variable which is initialized by means of | |
3677 | -- assignments. | |
725a69d2 | 3678 | |
3679 | -- In case of locally defined tagged types, the object containing the | |
02a2406d | 3680 | -- object containing the dispatch table is always a variable (instead of a |
3681 | -- constant). This is currently required to give support to late overriding | |
3682 | -- of primitives. For example: | |
725a69d2 | 3683 | |
3684 | -- procedure Example is | |
3685 | -- package Pkg is | |
3686 | -- type T1 is tagged null record; | |
3687 | -- procedure Prim (O : T1); | |
3688 | -- end Pkg; | |
3689 | ||
3690 | -- type T2 is new Pkg.T1 with null record; | |
3691 | -- procedure Prim (X : T2) is -- late overriding | |
3692 | -- begin | |
3693 | -- ... | |
3694 | -- ... | |
3695 | -- end; | |
952af0b9 | 3696 | |
1ecdfe4b | 3697 | -- WARNING: This routine manages Ghost regions. Return statements must be |
3698 | -- replaced by gotos which jump to the end of the routine and restore the | |
3699 | -- Ghost mode. | |
3700 | ||
17e14451 | 3701 | function Make_DT (Typ : Entity_Id; N : Node_Id := Empty) return List_Id is |
3702 | Loc : constant Source_Ptr := Sloc (Typ); | |
3703 | ||
725a69d2 | 3704 | Max_Predef_Prims : constant Int := |
3705 | UI_To_Int | |
3706 | (Intval | |
3707 | (Expression | |
17e14451 | 3708 | (Parent (RTE (RE_Max_Predef_Prims))))); |
3709 | ||
cc60bd16 | 3710 | DT_Decl : constant Elist_Id := New_Elmt_List; |
3711 | DT_Aggr : constant Elist_Id := New_Elmt_List; | |
3712 | -- Entities marked with attribute Is_Dispatch_Table_Entity | |
3713 | ||
9a666241 | 3714 | Dummy_Object : Entity_Id := Empty; |
3715 | -- Extra nonexistent object of type Typ internally used to compute the | |
3716 | -- offset to the components that reference secondary dispatch tables. | |
3717 | -- Used to statically allocate secondary dispatch tables. | |
3718 | ||
349db231 | 3719 | procedure Check_Premature_Freezing |
3720 | (Subp : Entity_Id; | |
3721 | Tagged_Type : Entity_Id; | |
3722 | Typ : Entity_Id); | |
d1a2e31b | 3723 | -- Verify that all untagged types in the profile of a subprogram are |
3724 | -- frozen at the point the subprogram is frozen. This enforces the rule | |
3725 | -- on RM 13.14 (14) as modified by AI05-019. At the point a subprogram | |
3726 | -- is frozen, enough must be known about it to build the activation | |
3727 | -- record for it, which requires at least that the size of all | |
3728 | -- parameters be known. Controlling arguments are by-reference, | |
decd66e0 | 3729 | -- and therefore the rule only applies to untagged types. Typical |
d1a2e31b | 3730 | -- violation of the rule involves an object declaration that freezes a |
3731 | -- tagged type, when one of its primitive operations has a type in its | |
3732 | -- profile whose full view has not been analyzed yet. More complex cases | |
3733 | -- involve composite types that have one private unfrozen subcomponent. | |
725a69d2 | 3734 | |
f301a57b | 3735 | procedure Export_DT (Typ : Entity_Id; DT : Entity_Id; Index : Nat := 0); |
3736 | -- Export the dispatch table DT of tagged type Typ. Required to generate | |
3737 | -- forward references and statically allocate the table. For primary | |
3738 | -- dispatch tables Index is 0; for secondary dispatch tables the value | |
3739 | -- of index must match the Suffix_Index value assigned to the table by | |
3740 | -- Make_Tags when generating its unique external name, and it is used to | |
3741 | -- retrieve from the Dispatch_Table_Wrappers list associated with Typ | |
3742 | -- the external name generated by Import_DT. | |
24971415 | 3743 | |
725a69d2 | 3744 | procedure Make_Secondary_DT |
acf97c11 | 3745 | (Typ : Entity_Id; |
3746 | Iface : Entity_Id; | |
9a666241 | 3747 | Iface_Comp : Node_Id; |
f301a57b | 3748 | Suffix_Index : Int; |
acf97c11 | 3749 | Num_Iface_Prims : Nat; |
3750 | Iface_DT_Ptr : Entity_Id; | |
3751 | Predef_Prims_Ptr : Entity_Id; | |
3752 | Build_Thunks : Boolean; | |
3753 | Result : List_Id); | |
cdb1c38f | 3754 | -- Ada 2005 (AI-251): Expand the declarations for a Secondary Dispatch |
3755 | -- Table of Typ associated with Iface. Each abstract interface of Typ | |
3756 | -- has two secondary dispatch tables: one containing pointers to thunks | |
3757 | -- and another containing pointers to the primitives covering the | |
3758 | -- interface primitives. The former secondary table is generated when | |
3759 | -- Build_Thunks is True, and provides common support for dispatching | |
3760 | -- calls through interface types; the latter secondary table is | |
3761 | -- generated when Build_Thunks is False, and provides support for | |
3762 | -- Generic Dispatching Constructors that dispatch calls through | |
278c67dc | 3763 | -- interface types. When constructing this latter table the value of |
3764 | -- Suffix_Index is -1 to indicate that there is no need to export such | |
3765 | -- table when building statically allocated dispatch tables; a positive | |
3766 | -- value of Suffix_Index must match the Suffix_Index value assigned to | |
3767 | -- this secondary dispatch table by Make_Tags when its unique external | |
3768 | -- name was generated. | |
9dfe12ae | 3769 | |
17e14451 | 3770 | ------------------------------ |
3771 | -- Check_Premature_Freezing -- | |
3772 | ------------------------------ | |
3773 | ||
349db231 | 3774 | procedure Check_Premature_Freezing |
3775 | (Subp : Entity_Id; | |
3776 | Tagged_Type : Entity_Id; | |
3777 | Typ : Entity_Id) | |
3778 | is | |
3779 | Comp : Entity_Id; | |
aada9bb5 | 3780 | |
3781 | function Is_Actual_For_Formal_Incomplete_Type | |
3782 | (T : Entity_Id) return Boolean; | |
65a805b2 | 3783 | -- In Ada 2012, if a nested generic has an incomplete formal type, |
3784 | -- the actual may be (and usually is) a private type whose completion | |
5f8e1c78 | 3785 | -- appears later. It is safe to build the dispatch table in this |
3786 | -- case, gigi will have full views available. | |
3787 | ||
3788 | ------------------------------------------ | |
3789 | -- Is_Actual_For_Formal_Incomplete_Type -- | |
3790 | ------------------------------------------ | |
3791 | ||
aada9bb5 | 3792 | function Is_Actual_For_Formal_Incomplete_Type |
3793 | (T : Entity_Id) return Boolean | |
5f8e1c78 | 3794 | is |
3795 | Gen_Par : Entity_Id; | |
3796 | F : Node_Id; | |
aada9bb5 | 3797 | |
5f8e1c78 | 3798 | begin |
3799 | if not Is_Generic_Instance (Current_Scope) | |
3800 | or else not Used_As_Generic_Actual (T) | |
3801 | then | |
3802 | return False; | |
5f8e1c78 | 3803 | else |
3804 | Gen_Par := Generic_Parent (Parent (Current_Scope)); | |
3805 | end if; | |
3806 | ||
3807 | F := | |
3808 | First | |
3809 | (Generic_Formal_Declarations | |
02a2406d | 3810 | (Unit_Declaration_Node (Gen_Par))); |
5f8e1c78 | 3811 | while Present (F) loop |
3812 | if Ekind (Defining_Identifier (F)) = E_Incomplete_Type then | |
3813 | return True; | |
3814 | end if; | |
3815 | ||
3816 | Next (F); | |
3817 | end loop; | |
3818 | ||
3819 | return False; | |
3820 | end Is_Actual_For_Formal_Incomplete_Type; | |
278c67dc | 3821 | |
aada9bb5 | 3822 | -- Start of processing for Check_Premature_Freezing |
3823 | ||
17e14451 | 3824 | begin |
496b8337 | 3825 | -- Note that if the type is a (subtype of) a generic actual, the |
3826 | -- actual will have been frozen by the instantiation. | |
3827 | ||
17e14451 | 3828 | if Present (N) |
349db231 | 3829 | and then Is_Private_Type (Typ) |
17e14451 | 3830 | and then No (Full_View (Typ)) |
3831 | and then not Is_Generic_Type (Typ) | |
3832 | and then not Is_Tagged_Type (Typ) | |
3833 | and then not Is_Frozen (Typ) | |
496b8337 | 3834 | and then not Is_Generic_Actual_Type (Typ) |
17e14451 | 3835 | then |
3836 | Error_Msg_Sloc := Sloc (Subp); | |
503f7fd3 | 3837 | Error_Msg_NE |
17e14451 | 3838 | ("declaration must appear after completion of type &", N, Typ); |
3839 | Error_Msg_NE | |
02a2406d | 3840 | ("\which is an untagged type in the profile of " |
3841 | & "primitive operation & declared#", N, Subp); | |
349db231 | 3842 | |
3843 | else | |
3844 | Comp := Private_Component (Typ); | |
3845 | ||
3846 | if not Is_Tagged_Type (Typ) | |
3847 | and then Present (Comp) | |
3848 | and then not Is_Frozen (Comp) | |
02a2406d | 3849 | and then not Is_Actual_For_Formal_Incomplete_Type (Comp) |
349db231 | 3850 | then |
3851 | Error_Msg_Sloc := Sloc (Subp); | |
3852 | Error_Msg_Node_2 := Subp; | |
3853 | Error_Msg_Name_1 := Chars (Tagged_Type); | |
3854 | Error_Msg_NE | |
3855 | ("declaration must appear after completion of type &", | |
02a2406d | 3856 | N, Comp); |
349db231 | 3857 | Error_Msg_NE |
02a2406d | 3858 | ("\which is a component of untagged type& in the profile " |
3859 | & "of primitive & of type % that is frozen by the " | |
3860 | & "declaration ", N, Typ); | |
349db231 | 3861 | end if; |
17e14451 | 3862 | end if; |
3863 | end Check_Premature_Freezing; | |
3864 | ||
24971415 | 3865 | --------------- |
3866 | -- Export_DT -- | |
3867 | --------------- | |
3868 | ||
f301a57b | 3869 | procedure Export_DT (Typ : Entity_Id; DT : Entity_Id; Index : Nat := 0) |
3870 | is | |
3871 | Count : Nat; | |
3872 | Elmt : Elmt_Id; | |
3873 | ||
24971415 | 3874 | begin |
3875 | Set_Is_Statically_Allocated (DT); | |
3876 | Set_Is_True_Constant (DT); | |
3877 | Set_Is_Exported (DT); | |
3878 | ||
f301a57b | 3879 | Count := 0; |
3880 | Elmt := First_Elmt (Dispatch_Table_Wrappers (Typ)); | |
3881 | while Count /= Index loop | |
3882 | Next_Elmt (Elmt); | |
3883 | Count := Count + 1; | |
3884 | end loop; | |
3885 | ||
3886 | pragma Assert (Related_Type (Node (Elmt)) = Typ); | |
3887 | ||
f92da234 | 3888 | Get_External_Name (Node (Elmt)); |
24971415 | 3889 | Set_Interface_Name (DT, |
3890 | Make_String_Literal (Loc, | |
3891 | Strval => String_From_Name_Buffer)); | |
3892 | ||
3893 | -- Ensure proper Sprint output of this implicit importation | |
3894 | ||
3895 | Set_Is_Internal (DT); | |
3896 | Set_Is_Public (DT); | |
3897 | end Export_DT; | |
3898 | ||
725a69d2 | 3899 | ----------------------- |
3900 | -- Make_Secondary_DT -- | |
3901 | ----------------------- | |
ee6ba406 | 3902 | |
725a69d2 | 3903 | procedure Make_Secondary_DT |
acf97c11 | 3904 | (Typ : Entity_Id; |
3905 | Iface : Entity_Id; | |
9a666241 | 3906 | Iface_Comp : Node_Id; |
f301a57b | 3907 | Suffix_Index : Int; |
acf97c11 | 3908 | Num_Iface_Prims : Nat; |
3909 | Iface_DT_Ptr : Entity_Id; | |
3910 | Predef_Prims_Ptr : Entity_Id; | |
3911 | Build_Thunks : Boolean; | |
3912 | Result : List_Id) | |
725a69d2 | 3913 | is |
3914 | Loc : constant Source_Ptr := Sloc (Typ); | |
f301a57b | 3915 | Exporting_Table : constant Boolean := |
3916 | Building_Static_DT (Typ) | |
3917 | and then Suffix_Index > 0; | |
ec97ce79 | 3918 | Iface_DT : constant Entity_Id := Make_Temporary (Loc, 'T'); |
3919 | Predef_Prims : constant Entity_Id := Make_Temporary (Loc, 'R'); | |
725a69d2 | 3920 | DT_Constr_List : List_Id; |
3921 | DT_Aggr_List : List_Id; | |
3922 | Empty_DT : Boolean := False; | |
3923 | Nb_Predef_Prims : Nat := 0; | |
3924 | Nb_Prim : Nat; | |
3925 | New_Node : Node_Id; | |
3926 | OSD : Entity_Id; | |
3927 | OSD_Aggr_List : List_Id; | |
3928 | Pos : Nat; | |
3929 | Prim : Entity_Id; | |
3930 | Prim_Elmt : Elmt_Id; | |
3931 | Prim_Ops_Aggr_List : List_Id; | |
343d35dc | 3932 | |
725a69d2 | 3933 | begin |
17e14451 | 3934 | -- Handle cases in which we do not generate statically allocated |
3935 | -- dispatch tables. | |
343d35dc | 3936 | |
24971415 | 3937 | if not Building_Static_DT (Typ) then |
725a69d2 | 3938 | Set_Ekind (Predef_Prims, E_Variable); |
725a69d2 | 3939 | Set_Ekind (Iface_DT, E_Variable); |
343d35dc | 3940 | |
725a69d2 | 3941 | -- Statically allocated dispatch tables and related entities are |
3942 | -- constants. | |
343d35dc | 3943 | |
725a69d2 | 3944 | else |
3945 | Set_Ekind (Predef_Prims, E_Constant); | |
3946 | Set_Is_Statically_Allocated (Predef_Prims); | |
3947 | Set_Is_True_Constant (Predef_Prims); | |
343d35dc | 3948 | |
725a69d2 | 3949 | Set_Ekind (Iface_DT, E_Constant); |
3950 | Set_Is_Statically_Allocated (Iface_DT); | |
3951 | Set_Is_True_Constant (Iface_DT); | |
343d35dc | 3952 | end if; |
3953 | ||
f301a57b | 3954 | -- Calculate the number of slots of the dispatch table. If the number |
3955 | -- of primitives of Typ is 0 we reserve a dummy single entry for its | |
0c826ed4 | 3956 | -- DT because at run time the pointer to this dummy entry will be |
f301a57b | 3957 | -- used as the tag. |
68f95949 | 3958 | |
cdb1c38f | 3959 | if Num_Iface_Prims = 0 then |
725a69d2 | 3960 | Empty_DT := True; |
3961 | Nb_Prim := 1; | |
cdb1c38f | 3962 | else |
3963 | Nb_Prim := Num_Iface_Prims; | |
725a69d2 | 3964 | end if; |
76a1c25b | 3965 | |
725a69d2 | 3966 | -- Generate: |
952af0b9 | 3967 | |
725a69d2 | 3968 | -- Predef_Prims : Address_Array (1 .. Default_Prim_Ops_Count) := |
3969 | -- (predef-prim-op-thunk-1'address, | |
3970 | -- predef-prim-op-thunk-2'address, | |
3971 | -- ... | |
3972 | -- predef-prim-op-thunk-n'address); | |
3973 | -- for Predef_Prims'Alignment use Address'Alignment | |
952af0b9 | 3974 | |
725a69d2 | 3975 | -- Stage 1: Calculate the number of predefined primitives |
76a1c25b | 3976 | |
24971415 | 3977 | if not Building_Static_DT (Typ) then |
725a69d2 | 3978 | Nb_Predef_Prims := Max_Predef_Prims; |
3979 | else | |
3980 | Prim_Elmt := First_Elmt (Primitive_Operations (Typ)); | |
3981 | while Present (Prim_Elmt) loop | |
3982 | Prim := Node (Prim_Elmt); | |
aad6babd | 3983 | |
725a69d2 | 3984 | if Is_Predefined_Dispatching_Operation (Prim) |
3985 | and then not Is_Abstract_Subprogram (Prim) | |
3986 | then | |
3987 | Pos := UI_To_Int (DT_Position (Prim)); | |
aad6babd | 3988 | |
725a69d2 | 3989 | if Pos > Nb_Predef_Prims then |
3990 | Nb_Predef_Prims := Pos; | |
3991 | end if; | |
3992 | end if; | |
aad6babd | 3993 | |
725a69d2 | 3994 | Next_Elmt (Prim_Elmt); |
3995 | end loop; | |
3996 | end if; | |
aad6babd | 3997 | |
83d39cd3 | 3998 | if Generate_SCIL then |
3999 | Nb_Predef_Prims := 0; | |
4000 | end if; | |
4001 | ||
725a69d2 | 4002 | -- Stage 2: Create the thunks associated with the predefined |
4003 | -- primitives and save their entity to fill the aggregate. | |
ee6ba406 | 4004 | |
725a69d2 | 4005 | declare |
4006 | Prim_Table : array (Nat range 1 .. Nb_Predef_Prims) of Entity_Id; | |
cc60bd16 | 4007 | Decl : Node_Id; |
725a69d2 | 4008 | Thunk_Id : Entity_Id; |
4009 | Thunk_Code : Node_Id; | |
aad6babd | 4010 | |
725a69d2 | 4011 | begin |
4012 | Prim_Ops_Aggr_List := New_List; | |
4013 | Prim_Table := (others => Empty); | |
aad6babd | 4014 | |
cdb1c38f | 4015 | if Building_Static_DT (Typ) then |
4016 | Prim_Elmt := First_Elmt (Primitive_Operations (Typ)); | |
4017 | while Present (Prim_Elmt) loop | |
4018 | Prim := Node (Prim_Elmt); | |
aad6babd | 4019 | |
cdb1c38f | 4020 | if Is_Predefined_Dispatching_Operation (Prim) |
4021 | and then not Is_Abstract_Subprogram (Prim) | |
3f8cf2d2 | 4022 | and then not Is_Eliminated (Prim) |
83d39cd3 | 4023 | and then not Generate_SCIL |
cdb1c38f | 4024 | and then not Present (Prim_Table |
4025 | (UI_To_Int (DT_Position (Prim)))) | |
4026 | then | |
4027 | if not Build_Thunks then | |
4028 | Prim_Table (UI_To_Int (DT_Position (Prim))) := | |
4029 | Alias (Prim); | |
aad6babd | 4030 | |
cdb1c38f | 4031 | else |
fc2907f6 | 4032 | Expand_Interface_Thunk |
4033 | (Ultimate_Alias (Prim), Thunk_Id, Thunk_Code); | |
aad6babd | 4034 | |
cdb1c38f | 4035 | if Present (Thunk_Id) then |
4036 | Append_To (Result, Thunk_Code); | |
46532462 | 4037 | Prim_Table (UI_To_Int (DT_Position (Prim))) := |
4038 | Thunk_Id; | |
cdb1c38f | 4039 | end if; |
4040 | end if; | |
725a69d2 | 4041 | end if; |
aad6babd | 4042 | |
cdb1c38f | 4043 | Next_Elmt (Prim_Elmt); |
4044 | end loop; | |
4045 | end if; | |
aad6babd | 4046 | |
725a69d2 | 4047 | for J in Prim_Table'Range loop |
4048 | if Present (Prim_Table (J)) then | |
4049 | New_Node := | |
cc60bd16 | 4050 | Unchecked_Convert_To (RTE (RE_Prim_Ptr), |
acf97c11 | 4051 | Make_Attribute_Reference (Loc, |
83c6c069 | 4052 | Prefix => New_Occurrence_Of (Prim_Table (J), Loc), |
acf97c11 | 4053 | Attribute_Name => Name_Unrestricted_Access)); |
725a69d2 | 4054 | else |
cc60bd16 | 4055 | New_Node := Make_Null (Loc); |
725a69d2 | 4056 | end if; |
952af0b9 | 4057 | |
725a69d2 | 4058 | Append_To (Prim_Ops_Aggr_List, New_Node); |
4059 | end loop; | |
952af0b9 | 4060 | |
cc60bd16 | 4061 | New_Node := |
02a2406d | 4062 | Make_Aggregate (Loc, Expressions => Prim_Ops_Aggr_List); |
cc60bd16 | 4063 | |
4064 | -- Remember aggregates initializing dispatch tables | |
4065 | ||
4066 | Append_Elmt (New_Node, DT_Aggr); | |
4067 | ||
4068 | Decl := | |
4069 | Make_Subtype_Declaration (Loc, | |
ec97ce79 | 4070 | Defining_Identifier => Make_Temporary (Loc, 'S'), |
4071 | Subtype_Indication => | |
83c6c069 | 4072 | New_Occurrence_Of (RTE (RE_Address_Array), Loc)); |
cc60bd16 | 4073 | |
4074 | Append_To (Result, Decl); | |
4075 | ||
725a69d2 | 4076 | Append_To (Result, |
4077 | Make_Object_Declaration (Loc, | |
4078 | Defining_Identifier => Predef_Prims, | |
24971415 | 4079 | Constant_Present => Building_Static_DT (Typ), |
725a69d2 | 4080 | Aliased_Present => True, |
83c6c069 | 4081 | Object_Definition => New_Occurrence_Of |
cc60bd16 | 4082 | (Defining_Identifier (Decl), Loc), |
4083 | Expression => New_Node)); | |
aad6babd | 4084 | |
725a69d2 | 4085 | Append_To (Result, |
4086 | Make_Attribute_Definition_Clause (Loc, | |
83c6c069 | 4087 | Name => New_Occurrence_Of (Predef_Prims, Loc), |
725a69d2 | 4088 | Chars => Name_Alignment, |
4089 | Expression => | |
4090 | Make_Attribute_Reference (Loc, | |
4091 | Prefix => | |
83c6c069 | 4092 | New_Occurrence_Of (RTE (RE_Integer_Address), Loc), |
725a69d2 | 4093 | Attribute_Name => Name_Alignment))); |
4094 | end; | |
aad6babd | 4095 | |
725a69d2 | 4096 | -- Generate |
76a1c25b | 4097 | |
725a69d2 | 4098 | -- OSD : Ada.Tags.Object_Specific_Data (Nb_Prims) := |
4099 | -- (OSD_Table => (1 => <value>, | |
4100 | -- ... | |
4101 | -- N => <value>)); | |
76a1c25b | 4102 | |
725a69d2 | 4103 | -- Iface_DT : Dispatch_Table (Nb_Prims) := |
4104 | -- ([ Signature => <sig-value> ], | |
4105 | -- Tag_Kind => <tag_kind-value>, | |
4106 | -- Predef_Prims => Predef_Prims'Address, | |
4107 | -- Offset_To_Top => 0, | |
4108 | -- OSD => OSD'Address, | |
4109 | -- Prims_Ptr => (prim-op-1'address, | |
4110 | -- prim-op-2'address, | |
4111 | -- ... | |
4112 | -- prim-op-n'address)); | |
f301a57b | 4113 | -- for Iface_DT'Alignment use Address'Alignment; |
76a1c25b | 4114 | |
725a69d2 | 4115 | -- Stage 3: Initialize the discriminant and the record components |
aad6babd | 4116 | |
725a69d2 | 4117 | DT_Constr_List := New_List; |
4118 | DT_Aggr_List := New_List; | |
343d35dc | 4119 | |
4c5d0f70 | 4120 | -- Nb_Prim |
343d35dc | 4121 | |
4c5d0f70 | 4122 | Append_To (DT_Constr_List, Make_Integer_Literal (Loc, Nb_Prim)); |
4123 | Append_To (DT_Aggr_List, Make_Integer_Literal (Loc, Nb_Prim)); | |
343d35dc | 4124 | |
725a69d2 | 4125 | -- Signature |
343d35dc | 4126 | |
725a69d2 | 4127 | if RTE_Record_Component_Available (RE_Signature) then |
4128 | Append_To (DT_Aggr_List, | |
83c6c069 | 4129 | New_Occurrence_Of (RTE (RE_Secondary_DT), Loc)); |
725a69d2 | 4130 | end if; |
343d35dc | 4131 | |
725a69d2 | 4132 | -- Tag_Kind |
343d35dc | 4133 | |
725a69d2 | 4134 | if RTE_Record_Component_Available (RE_Tag_Kind) then |
4135 | Append_To (DT_Aggr_List, Tagged_Kind (Typ)); | |
4136 | end if; | |
aad6babd | 4137 | |
725a69d2 | 4138 | -- Predef_Prims |
aad6babd | 4139 | |
725a69d2 | 4140 | Append_To (DT_Aggr_List, |
4141 | Make_Attribute_Reference (Loc, | |
02a2406d | 4142 | Prefix => New_Occurrence_Of (Predef_Prims, Loc), |
725a69d2 | 4143 | Attribute_Name => Name_Address)); |
aad6babd | 4144 | |
9a666241 | 4145 | -- If the location of the component that references this secondary |
4146 | -- dispatch table is variable then we have not declared the internal | |
4147 | -- dummy object; the value of Offset_To_Top will be set by the init | |
4148 | -- subprogram. | |
aad6babd | 4149 | |
9a666241 | 4150 | if No (Dummy_Object) then |
4151 | Append_To (DT_Aggr_List, Make_Integer_Literal (Loc, 0)); | |
4152 | ||
4153 | else | |
4154 | Append_To (DT_Aggr_List, | |
4277e5bb | 4155 | Make_Op_Minus (Loc, |
4156 | Make_Attribute_Reference (Loc, | |
4157 | Prefix => | |
4158 | Make_Selected_Component (Loc, | |
4159 | Prefix => | |
4160 | New_Occurrence_Of (Dummy_Object, Loc), | |
4161 | Selector_Name => | |
4162 | New_Occurrence_Of (Iface_Comp, Loc)), | |
4163 | Attribute_Name => Name_Position))); | |
9a666241 | 4164 | end if; |
aad6babd | 4165 | |
725a69d2 | 4166 | -- Generate the Object Specific Data table required to dispatch calls |
4167 | -- through synchronized interfaces. | |
aad6babd | 4168 | |
725a69d2 | 4169 | if Empty_DT |
4170 | or else Is_Abstract_Type (Typ) | |
4171 | or else Is_Controlled (Typ) | |
4172 | or else Restriction_Active (No_Dispatching_Calls) | |
4173 | or else not Is_Limited_Type (Typ) | |
a652dd51 | 4174 | or else not Has_Interfaces (Typ) |
cdb1c38f | 4175 | or else not Build_Thunks |
38d2fa31 | 4176 | or else not RTE_Record_Component_Available (RE_OSD_Table) |
725a69d2 | 4177 | then |
4178 | -- No OSD table required | |
ee6ba406 | 4179 | |
725a69d2 | 4180 | Append_To (DT_Aggr_List, |
83c6c069 | 4181 | New_Occurrence_Of (RTE (RE_Null_Address), Loc)); |
d62940bf | 4182 | |
725a69d2 | 4183 | else |
4184 | OSD_Aggr_List := New_List; | |
d62940bf | 4185 | |
725a69d2 | 4186 | declare |
4187 | Prim_Table : array (Nat range 1 .. Nb_Prim) of Entity_Id; | |
4188 | Prim : Entity_Id; | |
4189 | Prim_Alias : Entity_Id; | |
4190 | Prim_Elmt : Elmt_Id; | |
4191 | E : Entity_Id; | |
4192 | Count : Nat := 0; | |
4193 | Pos : Nat; | |
d62940bf | 4194 | |
725a69d2 | 4195 | begin |
4196 | Prim_Table := (others => Empty); | |
4197 | Prim_Alias := Empty; | |
d62940bf | 4198 | |
725a69d2 | 4199 | Prim_Elmt := First_Elmt (Primitive_Operations (Typ)); |
4200 | while Present (Prim_Elmt) loop | |
4201 | Prim := Node (Prim_Elmt); | |
d62940bf | 4202 | |
a652dd51 | 4203 | if Present (Interface_Alias (Prim)) |
725a69d2 | 4204 | and then Find_Dispatching_Type |
a652dd51 | 4205 | (Interface_Alias (Prim)) = Iface |
725a69d2 | 4206 | then |
a652dd51 | 4207 | Prim_Alias := Interface_Alias (Prim); |
fc2907f6 | 4208 | E := Ultimate_Alias (Prim); |
725a69d2 | 4209 | Pos := UI_To_Int (DT_Position (Prim_Alias)); |
68f95949 | 4210 | |
725a69d2 | 4211 | if Present (Prim_Table (Pos)) then |
4212 | pragma Assert (Prim_Table (Pos) = E); | |
4213 | null; | |
68f95949 | 4214 | |
725a69d2 | 4215 | else |
4216 | Prim_Table (Pos) := E; | |
4217 | ||
4218 | Append_To (OSD_Aggr_List, | |
4219 | Make_Component_Association (Loc, | |
02a2406d | 4220 | Choices => New_List ( |
725a69d2 | 4221 | Make_Integer_Literal (Loc, |
4222 | DT_Position (Prim_Alias))), | |
4223 | Expression => | |
4224 | Make_Integer_Literal (Loc, | |
4225 | DT_Position (Alias (Prim))))); | |
4226 | ||
4227 | Count := Count + 1; | |
4228 | end if; | |
4229 | end if; | |
4230 | ||
4231 | Next_Elmt (Prim_Elmt); | |
4232 | end loop; | |
4233 | pragma Assert (Count = Nb_Prim); | |
4234 | end; | |
4235 | ||
ec97ce79 | 4236 | OSD := Make_Temporary (Loc, 'I'); |
725a69d2 | 4237 | |
4238 | Append_To (Result, | |
4239 | Make_Object_Declaration (Loc, | |
4240 | Defining_Identifier => OSD, | |
4241 | Object_Definition => | |
4242 | Make_Subtype_Indication (Loc, | |
4243 | Subtype_Mark => | |
83c6c069 | 4244 | New_Occurrence_Of (RTE (RE_Object_Specific_Data), Loc), |
02a2406d | 4245 | Constraint => |
725a69d2 | 4246 | Make_Index_Or_Discriminant_Constraint (Loc, |
4247 | Constraints => New_List ( | |
4248 | Make_Integer_Literal (Loc, Nb_Prim)))), | |
725a69d2 | 4249 | |
ec97ce79 | 4250 | Expression => |
4251 | Make_Aggregate (Loc, | |
4252 | Component_Associations => New_List ( | |
4253 | Make_Component_Association (Loc, | |
02a2406d | 4254 | Choices => New_List ( |
ec97ce79 | 4255 | New_Occurrence_Of |
4256 | (RTE_Record_Component (RE_OSD_Num_Prims), Loc)), | |
4257 | Expression => | |
4258 | Make_Integer_Literal (Loc, Nb_Prim)), | |
4259 | ||
4260 | Make_Component_Association (Loc, | |
02a2406d | 4261 | Choices => New_List ( |
ec97ce79 | 4262 | New_Occurrence_Of |
4263 | (RTE_Record_Component (RE_OSD_Table), Loc)), | |
4264 | Expression => Make_Aggregate (Loc, | |
4265 | Component_Associations => OSD_Aggr_List)))))); | |
725a69d2 | 4266 | |
17e14451 | 4267 | Append_To (Result, |
4268 | Make_Attribute_Definition_Clause (Loc, | |
83c6c069 | 4269 | Name => New_Occurrence_Of (OSD, Loc), |
17e14451 | 4270 | Chars => Name_Alignment, |
4271 | Expression => | |
4272 | Make_Attribute_Reference (Loc, | |
02a2406d | 4273 | Prefix => |
83c6c069 | 4274 | New_Occurrence_Of (RTE (RE_Integer_Address), Loc), |
17e14451 | 4275 | Attribute_Name => Name_Alignment))); |
4276 | ||
725a69d2 | 4277 | -- In secondary dispatch tables the Typeinfo component contains |
4278 | -- the address of the Object Specific Data (see a-tags.ads) | |
4279 | ||
4280 | Append_To (DT_Aggr_List, | |
4281 | Make_Attribute_Reference (Loc, | |
02a2406d | 4282 | Prefix => New_Occurrence_Of (OSD, Loc), |
725a69d2 | 4283 | Attribute_Name => Name_Address)); |
4284 | end if; | |
4285 | ||
4286 | -- Initialize the table of primitive operations | |
4287 | ||
4288 | Prim_Ops_Aggr_List := New_List; | |
4289 | ||
4290 | if Empty_DT then | |
cc60bd16 | 4291 | Append_To (Prim_Ops_Aggr_List, Make_Null (Loc)); |
725a69d2 | 4292 | |
4293 | elsif Is_Abstract_Type (Typ) | |
9a479e51 | 4294 | or else not Building_Static_DT (Typ) |
725a69d2 | 4295 | then |
4296 | for J in 1 .. Nb_Prim loop | |
cc60bd16 | 4297 | Append_To (Prim_Ops_Aggr_List, Make_Null (Loc)); |
725a69d2 | 4298 | end loop; |
4299 | ||
4300 | else | |
4301 | declare | |
d00681a7 | 4302 | CPP_Nb_Prims : constant Nat := CPP_Num_Prims (Typ); |
4303 | E : Entity_Id; | |
4304 | Prim_Pos : Nat; | |
4305 | Prim_Table : array (Nat range 1 .. Nb_Prim) of Entity_Id; | |
4306 | Thunk_Code : Node_Id; | |
4307 | Thunk_Id : Entity_Id; | |
725a69d2 | 4308 | |
4309 | begin | |
4310 | Prim_Table := (others => Empty); | |
4311 | ||
4312 | Prim_Elmt := First_Elmt (Primitive_Operations (Typ)); | |
4313 | while Present (Prim_Elmt) loop | |
d00681a7 | 4314 | Prim := Node (Prim_Elmt); |
4315 | E := Ultimate_Alias (Prim); | |
4316 | Prim_Pos := UI_To_Int (DT_Position (E)); | |
725a69d2 | 4317 | |
d00681a7 | 4318 | -- Do not reference predefined primitives because they are |
4319 | -- located in a separate dispatch table; skip abstract and | |
4320 | -- eliminated primitives; skip primitives located in the C++ | |
4321 | -- part of the dispatch table because their slot is set by | |
4322 | -- the IC routine. | |
3f8cf2d2 | 4323 | |
725a69d2 | 4324 | if not Is_Predefined_Dispatching_Operation (Prim) |
a652dd51 | 4325 | and then Present (Interface_Alias (Prim)) |
725a69d2 | 4326 | and then not Is_Abstract_Subprogram (Alias (Prim)) |
3f8cf2d2 | 4327 | and then not Is_Eliminated (Alias (Prim)) |
d00681a7 | 4328 | and then (not Is_CPP_Class (Root_Type (Typ)) |
4329 | or else Prim_Pos > CPP_Nb_Prims) | |
725a69d2 | 4330 | and then Find_Dispatching_Type |
a652dd51 | 4331 | (Interface_Alias (Prim)) = Iface |
725a69d2 | 4332 | |
4333 | -- Generate the code of the thunk only if the abstract | |
4334 | -- interface type is not an immediate ancestor of | |
d00681a7 | 4335 | -- Tagged_Type. Otherwise the DT associated with the |
725a69d2 | 4336 | -- interface is the primary DT. |
4337 | ||
cb4af01d | 4338 | and then not Is_Ancestor (Iface, Typ, |
4339 | Use_Full_View => True) | |
725a69d2 | 4340 | then |
cdb1c38f | 4341 | if not Build_Thunks then |
d00681a7 | 4342 | Prim_Pos := |
a652dd51 | 4343 | UI_To_Int (DT_Position (Interface_Alias (Prim))); |
d00681a7 | 4344 | Prim_Table (Prim_Pos) := Alias (Prim); |
4345 | ||
cdb1c38f | 4346 | else |
4347 | Expand_Interface_Thunk (Prim, Thunk_Id, Thunk_Code); | |
725a69d2 | 4348 | |
cdb1c38f | 4349 | if Present (Thunk_Id) then |
d00681a7 | 4350 | Prim_Pos := |
a652dd51 | 4351 | UI_To_Int (DT_Position (Interface_Alias (Prim))); |
cdb1c38f | 4352 | |
d00681a7 | 4353 | Prim_Table (Prim_Pos) := Thunk_Id; |
cdb1c38f | 4354 | Append_To (Result, Thunk_Code); |
4355 | end if; | |
725a69d2 | 4356 | end if; |
4357 | end if; | |
4358 | ||
4359 | Next_Elmt (Prim_Elmt); | |
4360 | end loop; | |
4361 | ||
4362 | for J in Prim_Table'Range loop | |
4363 | if Present (Prim_Table (J)) then | |
4364 | New_Node := | |
cc60bd16 | 4365 | Unchecked_Convert_To (RTE (RE_Prim_Ptr), |
acf97c11 | 4366 | Make_Attribute_Reference (Loc, |
83c6c069 | 4367 | Prefix => New_Occurrence_Of (Prim_Table (J), Loc), |
acf97c11 | 4368 | Attribute_Name => Name_Unrestricted_Access)); |
d00681a7 | 4369 | |
725a69d2 | 4370 | else |
cc60bd16 | 4371 | New_Node := Make_Null (Loc); |
725a69d2 | 4372 | end if; |
4373 | ||
4374 | Append_To (Prim_Ops_Aggr_List, New_Node); | |
4375 | end loop; | |
4376 | end; | |
4377 | end if; | |
4378 | ||
cc60bd16 | 4379 | New_Node := |
725a69d2 | 4380 | Make_Aggregate (Loc, |
cc60bd16 | 4381 | Expressions => Prim_Ops_Aggr_List); |
4382 | ||
4383 | Append_To (DT_Aggr_List, New_Node); | |
4384 | ||
4385 | -- Remember aggregates initializing dispatch tables | |
4386 | ||
4387 | Append_Elmt (New_Node, DT_Aggr); | |
725a69d2 | 4388 | |
9a666241 | 4389 | -- Note: Secondary dispatch tables are declared constant only if |
4390 | -- we can compute their offset field by means of the extra dummy | |
4391 | -- object; otherwise they cannot be declared constant and the | |
4392 | -- Offset_To_Top component is initialized by the IP routine. | |
f301a57b | 4393 | |
725a69d2 | 4394 | Append_To (Result, |
4395 | Make_Object_Declaration (Loc, | |
4396 | Defining_Identifier => Iface_DT, | |
4397 | Aliased_Present => True, | |
9a666241 | 4398 | Constant_Present => Present (Dummy_Object), |
f301a57b | 4399 | |
725a69d2 | 4400 | Object_Definition => |
4401 | Make_Subtype_Indication (Loc, | |
83c6c069 | 4402 | Subtype_Mark => New_Occurrence_Of |
725a69d2 | 4403 | (RTE (RE_Dispatch_Table_Wrapper), Loc), |
4404 | Constraint => Make_Index_Or_Discriminant_Constraint (Loc, | |
4405 | Constraints => DT_Constr_List)), | |
4406 | ||
f301a57b | 4407 | Expression => |
4408 | Make_Aggregate (Loc, | |
4409 | Expressions => DT_Aggr_List))); | |
725a69d2 | 4410 | |
17e14451 | 4411 | Append_To (Result, |
4412 | Make_Attribute_Definition_Clause (Loc, | |
83c6c069 | 4413 | Name => New_Occurrence_Of (Iface_DT, Loc), |
17e14451 | 4414 | Chars => Name_Alignment, |
f301a57b | 4415 | |
17e14451 | 4416 | Expression => |
4417 | Make_Attribute_Reference (Loc, | |
f301a57b | 4418 | Prefix => |
83c6c069 | 4419 | New_Occurrence_Of (RTE (RE_Integer_Address), Loc), |
17e14451 | 4420 | Attribute_Name => Name_Alignment))); |
4421 | ||
f301a57b | 4422 | if Exporting_Table then |
4423 | Export_DT (Typ, Iface_DT, Suffix_Index); | |
4424 | ||
725a69d2 | 4425 | -- Generate code to create the pointer to the dispatch table |
4426 | ||
f301a57b | 4427 | -- Iface_DT_Ptr : Tag := Tag!(DT.Prims_Ptr'Address); |
725a69d2 | 4428 | |
f301a57b | 4429 | -- Note: This declaration is not added here if the table is exported |
4430 | -- because in such case Make_Tags has already added this declaration. | |
4431 | ||
4432 | else | |
4433 | Append_To (Result, | |
4434 | Make_Object_Declaration (Loc, | |
4435 | Defining_Identifier => Iface_DT_Ptr, | |
4436 | Constant_Present => True, | |
4437 | ||
4438 | Object_Definition => | |
83c6c069 | 4439 | New_Occurrence_Of (RTE (RE_Interface_Tag), Loc), |
f301a57b | 4440 | |
4441 | Expression => | |
4442 | Unchecked_Convert_To (RTE (RE_Interface_Tag), | |
4443 | Make_Attribute_Reference (Loc, | |
4444 | Prefix => | |
4445 | Make_Selected_Component (Loc, | |
83c6c069 | 4446 | Prefix => New_Occurrence_Of (Iface_DT, Loc), |
f301a57b | 4447 | Selector_Name => |
4448 | New_Occurrence_Of | |
4449 | (RTE_Record_Component (RE_Prims_Ptr), Loc)), | |
4450 | Attribute_Name => Name_Address)))); | |
4451 | end if; | |
725a69d2 | 4452 | |
acf97c11 | 4453 | Append_To (Result, |
4454 | Make_Object_Declaration (Loc, | |
4455 | Defining_Identifier => Predef_Prims_Ptr, | |
4456 | Constant_Present => True, | |
f301a57b | 4457 | |
4458 | Object_Definition => | |
83c6c069 | 4459 | New_Occurrence_Of (RTE (RE_Address), Loc), |
f301a57b | 4460 | |
4461 | Expression => | |
acf97c11 | 4462 | Make_Attribute_Reference (Loc, |
f301a57b | 4463 | Prefix => |
acf97c11 | 4464 | Make_Selected_Component (Loc, |
83c6c069 | 4465 | Prefix => New_Occurrence_Of (Iface_DT, Loc), |
f301a57b | 4466 | Selector_Name => |
4467 | New_Occurrence_Of | |
4468 | (RTE_Record_Component (RE_Predef_Prims), Loc)), | |
acf97c11 | 4469 | Attribute_Name => Name_Address))); |
4470 | ||
cc60bd16 | 4471 | -- Remember entities containing dispatch tables |
acf97c11 | 4472 | |
cc60bd16 | 4473 | Append_Elmt (Predef_Prims, DT_Decl); |
4474 | Append_Elmt (Iface_DT, DT_Decl); | |
725a69d2 | 4475 | end Make_Secondary_DT; |
4476 | ||
4477 | -- Local variables | |
4478 | ||
72a98436 | 4479 | Elab_Code : constant List_Id := New_List; |
4480 | Result : constant List_Id := New_List; | |
4481 | Tname : constant Name_Id := Chars (Typ); | |
4482 | ||
cb0deab3 | 4483 | -- When pragmas Discard_Names and No_Tagged_Streams simultaneously apply |
4484 | -- we initialize the Expanded_Name and the External_Tag of this tagged | |
4485 | -- type with an empty string. This is useful to avoid exposing entity | |
4486 | -- names at binary level. It can be done when both pragmas apply because | |
4487 | -- (1) Discard_Names allows initializing Expanded_Name with an | |
4488 | -- implementation defined value (Ada RM Section C.5 (7/2)). | |
4489 | -- (2) External_Tag (combined with Internal_Tag) is used for object | |
4490 | -- streaming and No_Tagged_Streams inhibits the generation of | |
4491 | -- streams. | |
4492 | ||
4493 | Discard_Names : constant Boolean := | |
4494 | Present (No_Tagged_Streams_Pragma (Typ)) | |
4495 | and then (Global_Discard_Names | |
5abc6fac | 4496 | or else Einfo.Discard_Names (Typ)); |
cb0deab3 | 4497 | |
72a98436 | 4498 | -- The following name entries are used by Make_DT to generate a number |
4499 | -- of entities related to a tagged type. These entities may be generated | |
4500 | -- in a scope other than that of the tagged type declaration, and if | |
4501 | -- the entities for two tagged types with the same name happen to be | |
4502 | -- generated in the same scope, we have to take care to use different | |
4503 | -- names. This is achieved by means of a unique serial number appended | |
4504 | -- to each generated entity name. | |
4505 | ||
4506 | Name_DT : constant Name_Id := | |
4507 | New_External_Name (Tname, 'T', Suffix_Index => -1); | |
4508 | Name_Exname : constant Name_Id := | |
4509 | New_External_Name (Tname, 'E', Suffix_Index => -1); | |
4510 | Name_HT_Link : constant Name_Id := | |
4511 | New_External_Name (Tname, 'H', Suffix_Index => -1); | |
4512 | Name_Predef_Prims : constant Name_Id := | |
4513 | New_External_Name (Tname, 'R', Suffix_Index => -1); | |
4514 | Name_SSD : constant Name_Id := | |
4515 | New_External_Name (Tname, 'S', Suffix_Index => -1); | |
4516 | Name_TSD : constant Name_Id := | |
4517 | New_External_Name (Tname, 'B', Suffix_Index => -1); | |
4518 | ||
150bddeb | 4519 | Saved_GM : constant Ghost_Mode_Type := Ghost_Mode; |
4520 | Saved_IGR : constant Node_Id := Ignored_Ghost_Region; | |
4521 | -- Save the Ghost-related attributes to restore on exit | |
e02e4129 | 4522 | |
725a69d2 | 4523 | AI : Elmt_Id; |
cdb1c38f | 4524 | AI_Tag_Elmt : Elmt_Id; |
24971415 | 4525 | AI_Tag_Comp : Elmt_Id; |
72a98436 | 4526 | DT : Entity_Id; |
f9162257 | 4527 | DT_Aggr_List : List_Id; |
24971415 | 4528 | DT_Constr_List : List_Id; |
725a69d2 | 4529 | DT_Ptr : Entity_Id; |
cb0deab3 | 4530 | Exname : Entity_Id; |
72a98436 | 4531 | HT_Link : Entity_Id; |
725a69d2 | 4532 | ITable : Node_Id; |
4533 | I_Depth : Nat := 0; | |
4534 | Iface_Table_Node : Node_Id; | |
4535 | Name_ITable : Name_Id; | |
725a69d2 | 4536 | Nb_Predef_Prims : Nat := 0; |
4537 | Nb_Prim : Nat := 0; | |
4538 | New_Node : Node_Id; | |
725a69d2 | 4539 | Num_Ifaces : Nat := 0; |
cc60bd16 | 4540 | Parent_Typ : Entity_Id; |
72a98436 | 4541 | Predef_Prims : Entity_Id; |
725a69d2 | 4542 | Prim : Entity_Id; |
4543 | Prim_Elmt : Elmt_Id; | |
4544 | Prim_Ops_Aggr_List : List_Id; | |
72a98436 | 4545 | SSD : Entity_Id; |
725a69d2 | 4546 | Suffix_Index : Int; |
4547 | Typ_Comps : Elist_Id; | |
4548 | Typ_Ifaces : Elist_Id; | |
72a98436 | 4549 | TSD : Entity_Id; |
725a69d2 | 4550 | TSD_Aggr_List : List_Id; |
4551 | TSD_Tags_List : List_Id; | |
17e14451 | 4552 | |
725a69d2 | 4553 | -- Start of processing for Make_DT |
4554 | ||
4555 | begin | |
17e14451 | 4556 | pragma Assert (Is_Frozen (Typ)); |
725a69d2 | 4557 | |
30f8d103 | 4558 | -- The tagged type being processed may be subject to pragma Ghost. Set |
4559 | -- the mode now to ensure that any nodes generated during dispatch table | |
4560 | -- creation are properly marked as Ghost. | |
360b005f | 4561 | |
e02e4129 | 4562 | Set_Ghost_Mode (Typ); |
360b005f | 4563 | |
17e14451 | 4564 | -- Handle cases in which there is no need to build the dispatch table |
725a69d2 | 4565 | |
17e14451 | 4566 | if Has_Dispatch_Table (Typ) |
4567 | or else No (Access_Disp_Table (Typ)) | |
4568 | or else Is_CPP_Class (Typ) | |
4569 | then | |
72a98436 | 4570 | goto Leave; |
725a69d2 | 4571 | |
17e14451 | 4572 | elsif No_Run_Time_Mode then |
4573 | Error_Msg_CRT ("tagged types", Typ); | |
72a98436 | 4574 | goto Leave; |
725a69d2 | 4575 | |
17e14451 | 4576 | elsif not RTE_Available (RE_Tag) then |
725a69d2 | 4577 | Append_To (Result, |
4578 | Make_Object_Declaration (Loc, | |
72a98436 | 4579 | Defining_Identifier => |
4580 | Node (First_Elmt (Access_Disp_Table (Typ))), | |
83c6c069 | 4581 | Object_Definition => New_Occurrence_Of (RTE (RE_Tag), Loc), |
725a69d2 | 4582 | Constant_Present => True, |
4583 | Expression => | |
24971415 | 4584 | Unchecked_Convert_To (RTE (RE_Tag), |
83c6c069 | 4585 | New_Occurrence_Of (RTE (RE_Null_Address), Loc)))); |
725a69d2 | 4586 | |
4587 | Analyze_List (Result, Suppress => All_Checks); | |
4588 | Error_Msg_CRT ("tagged types", Typ); | |
72a98436 | 4589 | goto Leave; |
725a69d2 | 4590 | end if; |
4591 | ||
17e14451 | 4592 | -- Ensure that the value of Max_Predef_Prims defined in a-tags is |
208fd589 | 4593 | -- correct. Valid values are 9 under configurable runtime or 15 |
17e14451 | 4594 | -- with full runtime. |
4595 | ||
4596 | if RTE_Available (RE_Interface_Data) then | |
208fd589 | 4597 | if Max_Predef_Prims /= 15 then |
17e14451 | 4598 | Error_Msg_N ("run-time library configuration error", Typ); |
72a98436 | 4599 | goto Leave; |
17e14451 | 4600 | end if; |
725a69d2 | 4601 | else |
208fd589 | 4602 | if Max_Predef_Prims /= 9 then |
17e14451 | 4603 | Error_Msg_N ("run-time library configuration error", Typ); |
4604 | Error_Msg_CRT ("tagged types", Typ); | |
72a98436 | 4605 | goto Leave; |
17e14451 | 4606 | end if; |
725a69d2 | 4607 | end if; |
4608 | ||
cb0deab3 | 4609 | DT := Make_Defining_Identifier (Loc, Name_DT); |
4610 | Exname := Make_Defining_Identifier (Loc, Name_Exname); | |
4611 | HT_Link := Make_Defining_Identifier (Loc, Name_HT_Link); | |
4612 | Predef_Prims := Make_Defining_Identifier (Loc, Name_Predef_Prims); | |
4613 | SSD := Make_Defining_Identifier (Loc, Name_SSD); | |
4614 | TSD := Make_Defining_Identifier (Loc, Name_TSD); | |
72a98436 | 4615 | |
cc60bd16 | 4616 | -- Initialize Parent_Typ handling private types |
4617 | ||
4618 | Parent_Typ := Etype (Typ); | |
4619 | ||
4620 | if Present (Full_View (Parent_Typ)) then | |
4621 | Parent_Typ := Full_View (Parent_Typ); | |
4622 | end if; | |
4623 | ||
17e14451 | 4624 | -- Ensure that all the primitives are frozen. This is only required when |
4625 | -- building static dispatch tables --- the primitives must be frozen to | |
4626 | -- be referenced (otherwise we have problems with the backend). It is | |
4627 | -- not a requirement with nonstatic dispatch tables because in this case | |
4628 | -- we generate now an empty dispatch table; the extra code required to | |
24971415 | 4629 | -- register the primitives in the slots will be generated later --- when |
17e14451 | 4630 | -- each primitive is frozen (see Freeze_Subprogram). |
725a69d2 | 4631 | |
d00681a7 | 4632 | if Building_Static_DT (Typ) then |
17e14451 | 4633 | declare |
0d445a83 | 4634 | Saved_FLLTT : constant Boolean := |
4635 | Freezing_Library_Level_Tagged_Type; | |
4636 | ||
4637 | Formal : Entity_Id; | |
4638 | Frnodes : List_Id; | |
555c63a6 | 4639 | Prim : Entity_Id; |
17e14451 | 4640 | Prim_Elmt : Elmt_Id; |
725a69d2 | 4641 | |
17e14451 | 4642 | begin |
4643 | Freezing_Library_Level_Tagged_Type := True; | |
555c63a6 | 4644 | |
17e14451 | 4645 | Prim_Elmt := First_Elmt (Primitive_Operations (Typ)); |
4646 | while Present (Prim_Elmt) loop | |
555c63a6 | 4647 | Prim := Node (Prim_Elmt); |
d74fc39a | 4648 | Frnodes := Freeze_Entity (Prim, Typ); |
725a69d2 | 4649 | |
0d445a83 | 4650 | -- We disable this check for abstract subprograms, given that |
4651 | -- they cannot be called directly and thus the state of their | |
4652 | -- untagged formals is of no concern. The RM is unclear in any | |
4653 | -- case concerning the need for this check, and this topic may | |
4654 | -- go back to the ARG. | |
4655 | ||
4656 | if not Is_Abstract_Subprogram (Prim) then | |
4657 | Formal := First_Formal (Prim); | |
4658 | while Present (Formal) loop | |
4659 | Check_Premature_Freezing (Prim, Typ, Etype (Formal)); | |
4660 | Next_Formal (Formal); | |
17e14451 | 4661 | end loop; |
4662 | ||
349db231 | 4663 | Check_Premature_Freezing (Prim, Typ, Etype (Prim)); |
0d445a83 | 4664 | end if; |
17e14451 | 4665 | |
4666 | if Present (Frnodes) then | |
4667 | Append_List_To (Result, Frnodes); | |
4668 | end if; | |
4669 | ||
4670 | Next_Elmt (Prim_Elmt); | |
4671 | end loop; | |
555c63a6 | 4672 | |
0d445a83 | 4673 | Freezing_Library_Level_Tagged_Type := Saved_FLLTT; |
17e14451 | 4674 | end; |
4675 | end if; | |
725a69d2 | 4676 | |
9a666241 | 4677 | if Building_Static_Secondary_DT (Typ) then |
4678 | declare | |
4679 | Cannot_Have_Null_Disc : Boolean := False; | |
4680 | Name_Dummy_Object : constant Name_Id := | |
4681 | New_External_Name (Tname, | |
4682 | 'P', Suffix_Index => -1); | |
4683 | begin | |
4684 | Dummy_Object := Make_Defining_Identifier (Loc, Name_Dummy_Object); | |
4685 | ||
4686 | -- Define the extra object imported and constant to avoid linker | |
4687 | -- errors (since this object is never declared). Required because | |
4688 | -- we implement RM 13.3(19) for exported and imported (variable) | |
4689 | -- objects by making them volatile. | |
4690 | ||
4691 | Set_Is_Imported (Dummy_Object); | |
4692 | Set_Ekind (Dummy_Object, E_Constant); | |
4693 | Set_Is_True_Constant (Dummy_Object); | |
4694 | Set_Related_Type (Dummy_Object, Typ); | |
4695 | ||
4696 | -- The scope must be set now to call Get_External_Name | |
4697 | ||
4698 | Set_Scope (Dummy_Object, Current_Scope); | |
4699 | ||
4700 | Get_External_Name (Dummy_Object); | |
4701 | Set_Interface_Name (Dummy_Object, | |
4702 | Make_String_Literal (Loc, Strval => String_From_Name_Buffer)); | |
4703 | ||
4704 | -- Ensure proper Sprint output of this implicit importation | |
4705 | ||
4706 | Set_Is_Internal (Dummy_Object); | |
4707 | ||
4708 | if not Has_Discriminants (Typ) then | |
4709 | Append_To (Result, | |
4710 | Make_Object_Declaration (Loc, | |
4711 | Defining_Identifier => Dummy_Object, | |
4712 | Constant_Present => True, | |
4713 | Object_Definition => New_Occurrence_Of (Typ, Loc))); | |
4714 | else | |
4715 | declare | |
4716 | Constr_List : constant List_Id := New_List; | |
4717 | Discrim : Node_Id; | |
4718 | ||
4719 | begin | |
4720 | Discrim := First_Discriminant (Typ); | |
4721 | while Present (Discrim) loop | |
4722 | if Is_Discrete_Type (Etype (Discrim)) then | |
4723 | Append_To (Constr_List, | |
4724 | Make_Attribute_Reference (Loc, | |
b11290d7 | 4725 | Prefix => |
4726 | New_Occurrence_Of (Etype (Discrim), Loc), | |
9a666241 | 4727 | Attribute_Name => Name_First)); |
4728 | ||
4729 | else | |
4730 | pragma Assert (Is_Access_Type (Etype (Discrim))); | |
4731 | Cannot_Have_Null_Disc := | |
4732 | Cannot_Have_Null_Disc | |
4733 | or else Can_Never_Be_Null (Etype (Discrim)); | |
4734 | Append_To (Constr_List, Make_Null (Loc)); | |
4735 | end if; | |
4736 | ||
4737 | Next_Discriminant (Discrim); | |
4738 | end loop; | |
4739 | ||
4740 | Append_To (Result, | |
4741 | Make_Object_Declaration (Loc, | |
4742 | Defining_Identifier => Dummy_Object, | |
4743 | Constant_Present => True, | |
4744 | Object_Definition => | |
4745 | Make_Subtype_Indication (Loc, | |
4746 | Subtype_Mark => New_Occurrence_Of (Typ, Loc), | |
4747 | Constraint => | |
4748 | Make_Index_Or_Discriminant_Constraint (Loc, | |
4749 | Constraints => Constr_List)))); | |
4750 | end; | |
4751 | end if; | |
4752 | ||
4753 | -- Given that the dummy object will not be declared at run time, | |
4754 | -- analyze its declaration with expansion disabled and warnings | |
4755 | -- and error messages ignored. | |
4756 | ||
4757 | Expander_Mode_Save_And_Set (False); | |
4758 | Ignore_Errors_Enable := Ignore_Errors_Enable + 1; | |
4759 | Analyze (Last (Result), Suppress => All_Checks); | |
4760 | Ignore_Errors_Enable := Ignore_Errors_Enable - 1; | |
4761 | Expander_Mode_Restore; | |
4762 | end; | |
4763 | end if; | |
4764 | ||
17e14451 | 4765 | -- Ada 2005 (AI-251): Build the secondary dispatch tables |
4766 | ||
a652dd51 | 4767 | if Has_Interfaces (Typ) then |
17e14451 | 4768 | Collect_Interface_Components (Typ, Typ_Comps); |
4769 | ||
f301a57b | 4770 | -- Each secondary dispatch table is assigned an unique positive |
4771 | -- suffix index; such value also corresponds with the location of | |
4772 | -- its entity in the Dispatch_Table_Wrappers list (see Make_Tags). | |
4773 | ||
4774 | -- Note: This value must be kept sync with the Suffix_Index values | |
4775 | -- generated by Make_Tags | |
4776 | ||
4777 | Suffix_Index := 1; | |
acf97c11 | 4778 | AI_Tag_Elmt := |
4779 | Next_Elmt (Next_Elmt (First_Elmt (Access_Disp_Table (Typ)))); | |
17e14451 | 4780 | |
4781 | AI_Tag_Comp := First_Elmt (Typ_Comps); | |
4782 | while Present (AI_Tag_Comp) loop | |
d00681a7 | 4783 | pragma Assert (Has_Suffix (Node (AI_Tag_Elmt), 'P')); |
cdb1c38f | 4784 | |
4785 | -- Build the secondary table containing pointers to thunks | |
4786 | ||
17e14451 | 4787 | Make_Secondary_DT |
02a2406d | 4788 | (Typ => Typ, |
b11290d7 | 4789 | Iface => |
4790 | Base_Type (Related_Type (Node (AI_Tag_Comp))), | |
9a666241 | 4791 | Iface_Comp => Node (AI_Tag_Comp), |
02a2406d | 4792 | Suffix_Index => Suffix_Index, |
b11290d7 | 4793 | Num_Iface_Prims => |
4794 | UI_To_Int (DT_Entry_Count (Node (AI_Tag_Comp))), | |
02a2406d | 4795 | Iface_DT_Ptr => Node (AI_Tag_Elmt), |
acf97c11 | 4796 | Predef_Prims_Ptr => Node (Next_Elmt (AI_Tag_Elmt)), |
02a2406d | 4797 | Build_Thunks => True, |
4798 | Result => Result); | |
cdb1c38f | 4799 | |
d00681a7 | 4800 | -- Skip secondary dispatch table referencing thunks to predefined |
4801 | -- primitives. | |
acf97c11 | 4802 | |
f301a57b | 4803 | Next_Elmt (AI_Tag_Elmt); |
d00681a7 | 4804 | pragma Assert (Has_Suffix (Node (AI_Tag_Elmt), 'Y')); |
4805 | ||
4806 | -- Secondary dispatch table referencing user-defined primitives | |
4807 | -- covered by this interface. | |
4808 | ||
acf97c11 | 4809 | Next_Elmt (AI_Tag_Elmt); |
d00681a7 | 4810 | pragma Assert (Has_Suffix (Node (AI_Tag_Elmt), 'D')); |
acf97c11 | 4811 | |
36b938a3 | 4812 | -- Build the secondary table containing pointers to primitives |
cdb1c38f | 4813 | -- (used to give support to Generic Dispatching Constructors). |
4814 | ||
4815 | Make_Secondary_DT | |
d00681a7 | 4816 | (Typ => Typ, |
4817 | Iface => Base_Type | |
4818 | (Related_Type (Node (AI_Tag_Comp))), | |
9a666241 | 4819 | Iface_Comp => Node (AI_Tag_Comp), |
d00681a7 | 4820 | Suffix_Index => -1, |
4821 | Num_Iface_Prims => UI_To_Int | |
4822 | (DT_Entry_Count (Node (AI_Tag_Comp))), | |
4823 | Iface_DT_Ptr => Node (AI_Tag_Elmt), | |
4824 | Predef_Prims_Ptr => Node (Next_Elmt (AI_Tag_Elmt)), | |
4825 | Build_Thunks => False, | |
4826 | Result => Result); | |
4827 | ||
4828 | -- Skip secondary dispatch table referencing predefined primitives | |
acf97c11 | 4829 | |
f301a57b | 4830 | Next_Elmt (AI_Tag_Elmt); |
d00681a7 | 4831 | pragma Assert (Has_Suffix (Node (AI_Tag_Elmt), 'Z')); |
acf97c11 | 4832 | |
17e14451 | 4833 | Suffix_Index := Suffix_Index + 1; |
d00681a7 | 4834 | Next_Elmt (AI_Tag_Elmt); |
17e14451 | 4835 | Next_Elmt (AI_Tag_Comp); |
4836 | end loop; | |
4837 | end if; | |
725a69d2 | 4838 | |
c6a30f24 | 4839 | -- Get the _tag entity and number of primitives of its dispatch table |
725a69d2 | 4840 | |
24971415 | 4841 | DT_Ptr := Node (First_Elmt (Access_Disp_Table (Typ))); |
4842 | Nb_Prim := UI_To_Int (DT_Entry_Count (First_Tag_Component (Typ))); | |
725a69d2 | 4843 | |
83d39cd3 | 4844 | if Generate_SCIL then |
4845 | Nb_Prim := 0; | |
4846 | end if; | |
4847 | ||
2ea346ac | 4848 | Set_Is_Statically_Allocated (DT, Is_Library_Level_Tagged_Type (Typ)); |
4849 | Set_Is_Statically_Allocated (SSD, Is_Library_Level_Tagged_Type (Typ)); | |
4850 | Set_Is_Statically_Allocated (TSD, Is_Library_Level_Tagged_Type (Typ)); | |
4851 | Set_Is_Statically_Allocated (Predef_Prims, | |
4852 | Is_Library_Level_Tagged_Type (Typ)); | |
725a69d2 | 4853 | |
4854 | -- In case of locally defined tagged type we declare the object | |
36b938a3 | 4855 | -- containing the dispatch table by means of a variable. Its |
725a69d2 | 4856 | -- initialization is done later by means of an assignment. This is |
4857 | -- required to generate its External_Tag. | |
4858 | ||
24971415 | 4859 | if not Building_Static_DT (Typ) then |
725a69d2 | 4860 | |
4861 | -- Generate: | |
4862 | -- DT : No_Dispatch_Table_Wrapper; | |
17e14451 | 4863 | -- for DT'Alignment use Address'Alignment; |
725a69d2 | 4864 | -- DT_Ptr : Tag := !Tag (DT.NDT_Prims_Ptr'Address); |
4865 | ||
24971415 | 4866 | if not Has_DT (Typ) then |
725a69d2 | 4867 | Append_To (Result, |
4868 | Make_Object_Declaration (Loc, | |
4869 | Defining_Identifier => DT, | |
4870 | Aliased_Present => True, | |
4871 | Constant_Present => False, | |
4872 | Object_Definition => | |
83c6c069 | 4873 | New_Occurrence_Of |
725a69d2 | 4874 | (RTE (RE_No_Dispatch_Table_Wrapper), Loc))); |
4875 | ||
17e14451 | 4876 | Append_To (Result, |
4877 | Make_Attribute_Definition_Clause (Loc, | |
83c6c069 | 4878 | Name => New_Occurrence_Of (DT, Loc), |
17e14451 | 4879 | Chars => Name_Alignment, |
4880 | Expression => | |
4881 | Make_Attribute_Reference (Loc, | |
02a2406d | 4882 | Prefix => |
83c6c069 | 4883 | New_Occurrence_Of (RTE (RE_Integer_Address), Loc), |
17e14451 | 4884 | Attribute_Name => Name_Alignment))); |
4885 | ||
725a69d2 | 4886 | Append_To (Result, |
4887 | Make_Object_Declaration (Loc, | |
4888 | Defining_Identifier => DT_Ptr, | |
83c6c069 | 4889 | Object_Definition => New_Occurrence_Of (RTE (RE_Tag), Loc), |
725a69d2 | 4890 | Constant_Present => True, |
4891 | Expression => | |
24971415 | 4892 | Unchecked_Convert_To (RTE (RE_Tag), |
725a69d2 | 4893 | Make_Attribute_Reference (Loc, |
02a2406d | 4894 | Prefix => |
725a69d2 | 4895 | Make_Selected_Component (Loc, |
02a2406d | 4896 | Prefix => New_Occurrence_Of (DT, Loc), |
4897 | Selector_Name => | |
4898 | New_Occurrence_Of | |
4899 | (RTE_Record_Component (RE_NDT_Prims_Ptr), Loc)), | |
725a69d2 | 4900 | Attribute_Name => Name_Address)))); |
4901 | ||
ff6293ec | 4902 | Set_Is_Statically_Allocated (DT_Ptr, |
4903 | Is_Library_Level_Tagged_Type (Typ)); | |
4904 | ||
98045ff0 | 4905 | -- Generate the SCIL node for the previous object declaration |
4906 | -- because it has a tag initialization. | |
4907 | ||
3dbca0d5 | 4908 | if Generate_SCIL then |
d215f619 | 4909 | New_Node := |
4910 | Make_SCIL_Dispatch_Table_Tag_Init (Sloc (Last (Result))); | |
d215f619 | 4911 | Set_SCIL_Entity (New_Node, Typ); |
5a44b136 | 4912 | Set_SCIL_Node (Last (Result), New_Node); |
83d39cd3 | 4913 | |
72a98436 | 4914 | goto Leave_SCIL; |
83d39cd3 | 4915 | |
4916 | -- Gnat2scil has its own implementation of dispatch tables, | |
4917 | -- different than what is being implemented here. Generating | |
4918 | -- further dispatch table initialization code would just | |
4919 | -- cause gnat2scil to generate useless Scil which CodePeer | |
4920 | -- would waste time and space analyzing, so we skip it. | |
3dbca0d5 | 4921 | end if; |
4922 | ||
725a69d2 | 4923 | -- Generate: |
4924 | -- DT : Dispatch_Table_Wrapper (Nb_Prim); | |
4925 | -- for DT'Alignment use Address'Alignment; | |
4926 | -- DT_Ptr : Tag := !Tag (DT.Prims_Ptr'Address); | |
4927 | ||
4928 | else | |
4929 | -- If the tagged type has no primitives we add a dummy slot | |
4930 | -- whose address will be the tag of this type. | |
4931 | ||
4932 | if Nb_Prim = 0 then | |
4933 | DT_Constr_List := | |
4934 | New_List (Make_Integer_Literal (Loc, 1)); | |
4935 | else | |
4936 | DT_Constr_List := | |
4937 | New_List (Make_Integer_Literal (Loc, Nb_Prim)); | |
4938 | end if; | |
4939 | ||
4940 | Append_To (Result, | |
4941 | Make_Object_Declaration (Loc, | |
4942 | Defining_Identifier => DT, | |
4943 | Aliased_Present => True, | |
4944 | Constant_Present => False, | |
4945 | Object_Definition => | |
4946 | Make_Subtype_Indication (Loc, | |
4947 | Subtype_Mark => | |
83c6c069 | 4948 | New_Occurrence_Of (RTE (RE_Dispatch_Table_Wrapper), Loc), |
02a2406d | 4949 | Constraint => |
4950 | Make_Index_Or_Discriminant_Constraint (Loc, | |
4951 | Constraints => DT_Constr_List)))); | |
725a69d2 | 4952 | |
4953 | Append_To (Result, | |
4954 | Make_Attribute_Definition_Clause (Loc, | |
83c6c069 | 4955 | Name => New_Occurrence_Of (DT, Loc), |
725a69d2 | 4956 | Chars => Name_Alignment, |
4957 | Expression => | |
4958 | Make_Attribute_Reference (Loc, | |
02a2406d | 4959 | Prefix => |
83c6c069 | 4960 | New_Occurrence_Of (RTE (RE_Integer_Address), Loc), |
725a69d2 | 4961 | Attribute_Name => Name_Alignment))); |
4962 | ||
4963 | Append_To (Result, | |
4964 | Make_Object_Declaration (Loc, | |
4965 | Defining_Identifier => DT_Ptr, | |
83c6c069 | 4966 | Object_Definition => New_Occurrence_Of (RTE (RE_Tag), Loc), |
725a69d2 | 4967 | Constant_Present => True, |
4968 | Expression => | |
24971415 | 4969 | Unchecked_Convert_To (RTE (RE_Tag), |
725a69d2 | 4970 | Make_Attribute_Reference (Loc, |
02a2406d | 4971 | Prefix => |
725a69d2 | 4972 | Make_Selected_Component (Loc, |
02a2406d | 4973 | Prefix => New_Occurrence_Of (DT, Loc), |
4974 | Selector_Name => | |
4975 | New_Occurrence_Of | |
4976 | (RTE_Record_Component (RE_Prims_Ptr), Loc)), | |
725a69d2 | 4977 | Attribute_Name => Name_Address)))); |
acf97c11 | 4978 | |
ff6293ec | 4979 | Set_Is_Statically_Allocated (DT_Ptr, |
4980 | Is_Library_Level_Tagged_Type (Typ)); | |
4981 | ||
98045ff0 | 4982 | -- Generate the SCIL node for the previous object declaration |
4983 | -- because it has a tag initialization. | |
9af28f61 | 4984 | |
3dbca0d5 | 4985 | if Generate_SCIL then |
d215f619 | 4986 | New_Node := |
4987 | Make_SCIL_Dispatch_Table_Tag_Init (Sloc (Last (Result))); | |
d215f619 | 4988 | Set_SCIL_Entity (New_Node, Typ); |
5a44b136 | 4989 | Set_SCIL_Node (Last (Result), New_Node); |
83d39cd3 | 4990 | |
72a98436 | 4991 | goto Leave_SCIL; |
83d39cd3 | 4992 | |
4993 | -- Gnat2scil has its own implementation of dispatch tables, | |
4994 | -- different than what is being implemented here. Generating | |
4995 | -- further dispatch table initialization code would just | |
4996 | -- cause gnat2scil to generate useless Scil which CodePeer | |
4997 | -- would waste time and space analyzing, so we skip it. | |
3dbca0d5 | 4998 | end if; |
4999 | ||
acf97c11 | 5000 | Append_To (Result, |
5001 | Make_Object_Declaration (Loc, | |
5002 | Defining_Identifier => | |
5003 | Node (Next_Elmt (First_Elmt (Access_Disp_Table (Typ)))), | |
5004 | Constant_Present => True, | |
02a2406d | 5005 | Object_Definition => |
5006 | New_Occurrence_Of (RTE (RE_Address), Loc), | |
eb3a419e | 5007 | Expression => |
acf97c11 | 5008 | Make_Attribute_Reference (Loc, |
02a2406d | 5009 | Prefix => |
acf97c11 | 5010 | Make_Selected_Component (Loc, |
02a2406d | 5011 | Prefix => New_Occurrence_Of (DT, Loc), |
5012 | Selector_Name => | |
5013 | New_Occurrence_Of | |
5014 | (RTE_Record_Component (RE_Predef_Prims), Loc)), | |
acf97c11 | 5015 | Attribute_Name => Name_Address))); |
725a69d2 | 5016 | end if; |
5017 | end if; | |
5018 | ||
cb0deab3 | 5019 | -- Generate: Expanded_Name : constant String := ""; |
f76c2b51 | 5020 | |
cb0deab3 | 5021 | if Discard_Names then |
f76c2b51 | 5022 | Append_To (Result, |
5023 | Make_Object_Declaration (Loc, | |
cb0deab3 | 5024 | Defining_Identifier => Exname, |
f76c2b51 | 5025 | Constant_Present => True, |
5026 | Object_Definition => New_Occurrence_Of (Standard_String, Loc), | |
5027 | Expression => | |
5028 | Make_String_Literal (Loc, ""))); | |
5029 | ||
cb0deab3 | 5030 | -- Generate: Exname : constant String := full_qualified_name (typ); |
343d35dc | 5031 | -- The type itself may be an anonymous parent type, so use the first |
5032 | -- subtype to have a user-recognizable name. | |
d62940bf | 5033 | |
f76c2b51 | 5034 | else |
5035 | Append_To (Result, | |
5036 | Make_Object_Declaration (Loc, | |
cb0deab3 | 5037 | Defining_Identifier => Exname, |
f76c2b51 | 5038 | Constant_Present => True, |
5039 | Object_Definition => New_Occurrence_Of (Standard_String, Loc), | |
5040 | Expression => | |
5041 | Make_String_Literal (Loc, | |
5042 | Fully_Qualified_Name_String (First_Subtype (Typ))))); | |
5043 | end if; | |
5044 | ||
cb0deab3 | 5045 | Set_Is_Statically_Allocated (Exname); |
5046 | Set_Is_True_Constant (Exname); | |
24971415 | 5047 | |
e7e688dd | 5048 | -- Declare the object used by Ada.Tags.Register_Tag |
5049 | ||
5050 | if RTE_Available (RE_Register_Tag) then | |
5051 | Append_To (Result, | |
5052 | Make_Object_Declaration (Loc, | |
5053 | Defining_Identifier => HT_Link, | |
c930fde5 | 5054 | Object_Definition => New_Occurrence_Of (RTE (RE_Tag), Loc), |
5055 | Expression => New_Occurrence_Of (RTE (RE_No_Tag), Loc))); | |
e7e688dd | 5056 | end if; |
5057 | ||
725a69d2 | 5058 | -- Generate code to create the storage for the type specific data object |
5059 | -- with enough space to store the tags of the ancestors plus the tags | |
5060 | -- of all the implemented interfaces (as described in a-tags.adb). | |
5061 | ||
5062 | -- TSD : Type_Specific_Data (I_Depth) := | |
5063 | -- (Idepth => I_Depth, | |
5064 | -- Access_Level => Type_Access_Level (Typ), | |
208fd589 | 5065 | -- Alignment => Typ'Alignment, |
cb0deab3 | 5066 | -- Expanded_Name => Cstring_Ptr!(Exname'Address)) |
5067 | -- External_Tag => Cstring_Ptr!(Exname'Address)) | |
e7e688dd | 5068 | -- HT_Link => HT_Link'Address, |
725a69d2 | 5069 | -- Transportable => <<boolean-value>>, |
835de585 | 5070 | -- Is_Abstract => <<boolean-value>>, |
bb3b440a | 5071 | -- Needs_Finalization => <<boolean-value>>, |
693b0822 | 5072 | -- [ Size_Func => Size_Prim'Access, ] |
5073 | -- [ Interfaces_Table => <<access-value>>, ] | |
24971415 | 5074 | -- [ SSD => SSD_Table'Address ] |
725a69d2 | 5075 | -- Tags_Table => (0 => null, |
5076 | -- 1 => Parent'Tag | |
5077 | -- ...); | |
5078 | -- for TSD'Alignment use Address'Alignment | |
5079 | ||
5080 | TSD_Aggr_List := New_List; | |
5081 | ||
5082 | -- Idepth: Count ancestors to compute the inheritance depth. For private | |
5083 | -- extensions, always go to the full view in order to compute the real | |
5084 | -- inheritance depth. | |
5085 | ||
5086 | declare | |
5087 | Current_Typ : Entity_Id; | |
5088 | Parent_Typ : Entity_Id; | |
5089 | ||
5090 | begin | |
5091 | I_Depth := 0; | |
5092 | Current_Typ := Typ; | |
5093 | loop | |
5094 | Parent_Typ := Etype (Current_Typ); | |
5095 | ||
5096 | if Is_Private_Type (Parent_Typ) then | |
5097 | Parent_Typ := Full_View (Base_Type (Parent_Typ)); | |
5098 | end if; | |
5099 | ||
5100 | exit when Parent_Typ = Current_Typ; | |
5101 | ||
5102 | I_Depth := I_Depth + 1; | |
5103 | Current_Typ := Parent_Typ; | |
5104 | end loop; | |
5105 | end; | |
5106 | ||
5107 | Append_To (TSD_Aggr_List, | |
17e14451 | 5108 | Make_Integer_Literal (Loc, I_Depth)); |
725a69d2 | 5109 | |
5110 | -- Access_Level | |
5111 | ||
5112 | Append_To (TSD_Aggr_List, | |
17e14451 | 5113 | Make_Integer_Literal (Loc, Type_Access_Level (Typ))); |
725a69d2 | 5114 | |
208fd589 | 5115 | -- Alignment |
5116 | ||
5117 | -- For CPP types we cannot rely on the value of 'Alignment provided | |
5118 | -- by the backend to initialize this TSD field. | |
5119 | ||
5120 | if Convention (Typ) = Convention_CPP | |
5121 | or else Is_CPP_Class (Root_Type (Typ)) | |
5122 | then | |
5123 | Append_To (TSD_Aggr_List, | |
5124 | Make_Integer_Literal (Loc, 0)); | |
5125 | else | |
5126 | Append_To (TSD_Aggr_List, | |
5127 | Make_Attribute_Reference (Loc, | |
02a2406d | 5128 | Prefix => New_Occurrence_Of (Typ, Loc), |
208fd589 | 5129 | Attribute_Name => Name_Alignment)); |
5130 | end if; | |
5131 | ||
725a69d2 | 5132 | -- Expanded_Name |
5133 | ||
5134 | Append_To (TSD_Aggr_List, | |
17e14451 | 5135 | Unchecked_Convert_To (RTE (RE_Cstring_Ptr), |
5136 | Make_Attribute_Reference (Loc, | |
cb0deab3 | 5137 | Prefix => New_Occurrence_Of (Exname, Loc), |
17e14451 | 5138 | Attribute_Name => Name_Address))); |
725a69d2 | 5139 | |
5140 | -- External_Tag of a local tagged type | |
5141 | ||
17e14451 | 5142 | -- <typ>A : constant String := |
725a69d2 | 5143 | -- "Internal tag at 16#tag-addr#: <full-name-of-typ>"; |
5144 | ||
5145 | -- The reason we generate this strange name is that we do not want to | |
5146 | -- enter local tagged types in the global hash table used to compute | |
5147 | -- the Internal_Tag attribute for two reasons: | |
5148 | ||
5149 | -- 1. It is hard to avoid a tasking race condition for entering the | |
5150 | -- entry into the hash table. | |
5151 | ||
5152 | -- 2. It would cause a storage leak, unless we rig up considerable | |
5153 | -- mechanism to remove the entry from the hash table on exit. | |
5154 | ||
5155 | -- So what we do is to generate the above external tag name, where the | |
5156 | -- hex address is the address of the local dispatch table (i.e. exactly | |
5157 | -- the value we want if Internal_Tag is computed from this string). | |
5158 | ||
5159 | -- Of course this value will only be valid if the tagged type is still | |
5160 | -- in scope, but it clearly must be erroneous to compute the internal | |
39a0c1d3 | 5161 | -- tag of a tagged type that is out of scope. |
725a69d2 | 5162 | |
17e14451 | 5163 | -- We don't do this processing if an explicit external tag has been |
5164 | -- specified. That's an odd case for which we have already issued a | |
5165 | -- warning, where we will not be able to compute the internal tag. | |
5166 | ||
cb0deab3 | 5167 | if not Discard_Names |
5168 | and then not Is_Library_Level_Entity (Typ) | |
17e14451 | 5169 | and then not Has_External_Tag_Rep_Clause (Typ) |
5170 | then | |
725a69d2 | 5171 | declare |
02a2406d | 5172 | Exname : constant Entity_Id := |
5173 | Make_Defining_Identifier (Loc, | |
5174 | Chars => New_External_Name (Tname, 'A')); | |
5175 | Full_Name : constant String_Id := | |
c6a30f24 | 5176 | Fully_Qualified_Name_String (First_Subtype (Typ)); |
02a2406d | 5177 | Str1_Id : String_Id; |
5178 | Str2_Id : String_Id; | |
725a69d2 | 5179 | |
5180 | begin | |
5181 | -- Generate: | |
17e14451 | 5182 | -- Str1 = "Internal tag at 16#"; |
725a69d2 | 5183 | |
5184 | Start_String; | |
5185 | Store_String_Chars ("Internal tag at 16#"); | |
5186 | Str1_Id := End_String; | |
5187 | ||
5188 | -- Generate: | |
17e14451 | 5189 | -- Str2 = "#: <type-full-name>"; |
725a69d2 | 5190 | |
5191 | Start_String; | |
5192 | Store_String_Chars ("#: "); | |
725a69d2 | 5193 | Store_String_Chars (Full_Name); |
17e14451 | 5194 | Str2_Id := End_String; |
725a69d2 | 5195 | |
5196 | -- Generate: | |
5197 | -- Exname : constant String := | |
17e14451 | 5198 | -- Str1 & Address_Image (Tag) & Str2; |
725a69d2 | 5199 | |
5200 | if RTE_Available (RE_Address_Image) then | |
5201 | Append_To (Result, | |
5202 | Make_Object_Declaration (Loc, | |
5203 | Defining_Identifier => Exname, | |
5204 | Constant_Present => True, | |
83c6c069 | 5205 | Object_Definition => New_Occurrence_Of |
725a69d2 | 5206 | (Standard_String, Loc), |
5207 | Expression => | |
5208 | Make_Op_Concat (Loc, | |
02a2406d | 5209 | Left_Opnd => Make_String_Literal (Loc, Str1_Id), |
725a69d2 | 5210 | Right_Opnd => |
5211 | Make_Op_Concat (Loc, | |
02a2406d | 5212 | Left_Opnd => |
725a69d2 | 5213 | Make_Function_Call (Loc, |
5214 | Name => | |
83c6c069 | 5215 | New_Occurrence_Of |
725a69d2 | 5216 | (RTE (RE_Address_Image), Loc), |
5217 | Parameter_Associations => New_List ( | |
5218 | Unchecked_Convert_To (RTE (RE_Address), | |
83c6c069 | 5219 | New_Occurrence_Of (DT_Ptr, Loc)))), |
725a69d2 | 5220 | Right_Opnd => |
17e14451 | 5221 | Make_String_Literal (Loc, Str2_Id))))); |
5222 | ||
f76c2b51 | 5223 | -- Generate: |
5224 | -- Exname : constant String := Str1 & Str2; | |
5225 | ||
725a69d2 | 5226 | else |
5227 | Append_To (Result, | |
5228 | Make_Object_Declaration (Loc, | |
5229 | Defining_Identifier => Exname, | |
5230 | Constant_Present => True, | |
02a2406d | 5231 | Object_Definition => |
5232 | New_Occurrence_Of (Standard_String, Loc), | |
5233 | Expression => | |
725a69d2 | 5234 | Make_Op_Concat (Loc, |
02a2406d | 5235 | Left_Opnd => Make_String_Literal (Loc, Str1_Id), |
5236 | Right_Opnd => Make_String_Literal (Loc, Str2_Id)))); | |
725a69d2 | 5237 | end if; |
5238 | ||
5239 | New_Node := | |
5240 | Unchecked_Convert_To (RTE (RE_Cstring_Ptr), | |
5241 | Make_Attribute_Reference (Loc, | |
02a2406d | 5242 | Prefix => New_Occurrence_Of (Exname, Loc), |
725a69d2 | 5243 | Attribute_Name => Name_Address)); |
5244 | end; | |
5245 | ||
5246 | -- External tag of a library-level tagged type: Check for a definition | |
5247 | -- of External_Tag. The clause is considered only if it applies to this | |
5248 | -- specific tagged type, as opposed to one of its ancestors. | |
cc60bd16 | 5249 | -- If the type is an unconstrained type extension, we are building the |
5250 | -- dispatch table of its anonymous base type, so the external tag, if | |
34fd8639 | 5251 | -- any was specified, must be retrieved from the first subtype. Go to |
5252 | -- the full view in case the clause is in the private part. | |
725a69d2 | 5253 | |
5254 | else | |
5255 | declare | |
cc60bd16 | 5256 | Def : constant Node_Id := Get_Attribute_Definition_Clause |
34fd8639 | 5257 | (Underlying_Type (First_Subtype (Typ)), |
cc60bd16 | 5258 | Attribute_External_Tag); |
5259 | ||
725a69d2 | 5260 | Old_Val : String_Id; |
5261 | New_Val : String_Id; | |
5262 | E : Entity_Id; | |
5263 | ||
5264 | begin | |
5265 | if not Present (Def) | |
cc60bd16 | 5266 | or else Entity (Name (Def)) /= First_Subtype (Typ) |
725a69d2 | 5267 | then |
5268 | New_Node := | |
5269 | Unchecked_Convert_To (RTE (RE_Cstring_Ptr), | |
5270 | Make_Attribute_Reference (Loc, | |
cb0deab3 | 5271 | Prefix => New_Occurrence_Of (Exname, Loc), |
725a69d2 | 5272 | Attribute_Name => Name_Address)); |
5273 | else | |
5274 | Old_Val := Strval (Expr_Value_S (Expression (Def))); | |
5275 | ||
17e14451 | 5276 | -- For the rep clause "for <typ>'external_tag use y" generate: |
725a69d2 | 5277 | |
17e14451 | 5278 | -- <typ>A : constant string := y; |
5279 | -- | |
5280 | -- <typ>A'Address is used to set the External_Tag component | |
5281 | -- of the TSD | |
725a69d2 | 5282 | |
5283 | -- Create a new nul terminated string if it is not already | |
5284 | ||
5285 | if String_Length (Old_Val) > 0 | |
5286 | and then | |
5287 | Get_String_Char (Old_Val, String_Length (Old_Val)) = 0 | |
5288 | then | |
5289 | New_Val := Old_Val; | |
5290 | else | |
5291 | Start_String (Old_Val); | |
5292 | Store_String_Char (Get_Char_Code (ASCII.NUL)); | |
5293 | New_Val := End_String; | |
5294 | end if; | |
5295 | ||
5296 | E := Make_Defining_Identifier (Loc, | |
5297 | New_External_Name (Chars (Typ), 'A')); | |
5298 | ||
5299 | Append_To (Result, | |
5300 | Make_Object_Declaration (Loc, | |
5301 | Defining_Identifier => E, | |
5302 | Constant_Present => True, | |
5303 | Object_Definition => | |
83c6c069 | 5304 | New_Occurrence_Of (Standard_String, Loc), |
725a69d2 | 5305 | Expression => |
5306 | Make_String_Literal (Loc, New_Val))); | |
5307 | ||
5308 | New_Node := | |
5309 | Unchecked_Convert_To (RTE (RE_Cstring_Ptr), | |
5310 | Make_Attribute_Reference (Loc, | |
02a2406d | 5311 | Prefix => New_Occurrence_Of (E, Loc), |
725a69d2 | 5312 | Attribute_Name => Name_Address)); |
5313 | end if; | |
5314 | end; | |
5315 | end if; | |
5316 | ||
17e14451 | 5317 | Append_To (TSD_Aggr_List, New_Node); |
725a69d2 | 5318 | |
5319 | -- HT_Link | |
5320 | ||
e7e688dd | 5321 | if RTE_Available (RE_Register_Tag) then |
5322 | Append_To (TSD_Aggr_List, | |
5323 | Unchecked_Convert_To (RTE (RE_Tag_Ptr), | |
5324 | Make_Attribute_Reference (Loc, | |
02a2406d | 5325 | Prefix => New_Occurrence_Of (HT_Link, Loc), |
e7e688dd | 5326 | Attribute_Name => Name_Address))); |
d39570ea | 5327 | |
5328 | elsif RTE_Record_Component_Available (RE_HT_Link) then | |
e7e688dd | 5329 | Append_To (TSD_Aggr_List, |
5330 | Unchecked_Convert_To (RTE (RE_Tag_Ptr), | |
83c6c069 | 5331 | New_Occurrence_Of (RTE (RE_Null_Address), Loc))); |
e7e688dd | 5332 | end if; |
725a69d2 | 5333 | |
5334 | -- Transportable: Set for types that can be used in remote calls | |
5335 | -- with respect to E.4(18) legality rules. | |
5336 | ||
17e14451 | 5337 | declare |
5338 | Transportable : Entity_Id; | |
725a69d2 | 5339 | |
17e14451 | 5340 | begin |
5341 | Transportable := | |
5342 | Boolean_Literals | |
5343 | (Is_Pure (Typ) | |
5344 | or else Is_Shared_Passive (Typ) | |
5345 | or else | |
5346 | ((Is_Remote_Types (Typ) | |
02a2406d | 5347 | or else Is_Remote_Call_Interface (Typ)) |
17e14451 | 5348 | and then Original_View_In_Visible_Part (Typ)) |
5349 | or else not Comes_From_Source (Typ)); | |
5350 | ||
5351 | Append_To (TSD_Aggr_List, | |
5352 | New_Occurrence_Of (Transportable, Loc)); | |
5353 | end; | |
725a69d2 | 5354 | |
835de585 | 5355 | -- Is_Abstract (Ada 2012: AI05-0173). This functionality is not |
5356 | -- available in the HIE runtime. | |
3568e554 | 5357 | |
835de585 | 5358 | if RTE_Record_Component_Available (RE_Is_Abstract) then |
3568e554 | 5359 | declare |
835de585 | 5360 | Is_Abstract : Entity_Id; |
3568e554 | 5361 | begin |
835de585 | 5362 | Is_Abstract := Boolean_Literals (Is_Abstract_Type (Typ)); |
3568e554 | 5363 | Append_To (TSD_Aggr_List, |
835de585 | 5364 | New_Occurrence_Of (Is_Abstract, Loc)); |
3568e554 | 5365 | end; |
5366 | end if; | |
5367 | ||
bb3b440a | 5368 | -- Needs_Finalization: Set if the type is controlled or has controlled |
5369 | -- components. | |
952af0b9 | 5370 | |
17e14451 | 5371 | declare |
bb3b440a | 5372 | Needs_Fin : Entity_Id; |
17e14451 | 5373 | begin |
bb3b440a | 5374 | Needs_Fin := Boolean_Literals (Needs_Finalization (Typ)); |
5375 | Append_To (TSD_Aggr_List, New_Occurrence_Of (Needs_Fin, Loc)); | |
17e14451 | 5376 | end; |
725a69d2 | 5377 | |
cc60bd16 | 5378 | -- Size_Func |
5379 | ||
5380 | if RTE_Record_Component_Available (RE_Size_Func) then | |
925c2ba1 | 5381 | |
5382 | -- Initialize this field to Null_Address if we are not building | |
5383 | -- static dispatch tables static or if the size function is not | |
5384 | -- available. In the former case we cannot initialize this field | |
5385 | -- until the function is frozen and registered in the dispatch | |
5386 | -- table (see Register_Primitive). | |
5387 | ||
5388 | if not Building_Static_DT (Typ) or else not Has_DT (Typ) then | |
cc60bd16 | 5389 | Append_To (TSD_Aggr_List, |
5390 | Unchecked_Convert_To (RTE (RE_Size_Ptr), | |
83c6c069 | 5391 | New_Occurrence_Of (RTE (RE_Null_Address), Loc))); |
cc60bd16 | 5392 | |
5393 | else | |
5394 | declare | |
5395 | Prim_Elmt : Elmt_Id; | |
5396 | Prim : Entity_Id; | |
95c577d7 | 5397 | Size_Comp : Node_Id := Empty; |
cc60bd16 | 5398 | |
5399 | begin | |
5400 | Prim_Elmt := First_Elmt (Primitive_Operations (Typ)); | |
5401 | while Present (Prim_Elmt) loop | |
5402 | Prim := Node (Prim_Elmt); | |
5403 | ||
5404 | if Chars (Prim) = Name_uSize then | |
fc2907f6 | 5405 | Prim := Ultimate_Alias (Prim); |
cc60bd16 | 5406 | |
5407 | if Is_Abstract_Subprogram (Prim) then | |
fa6a6949 | 5408 | Size_Comp := |
cc60bd16 | 5409 | Unchecked_Convert_To (RTE (RE_Size_Ptr), |
83c6c069 | 5410 | New_Occurrence_Of (RTE (RE_Null_Address), Loc)); |
cc60bd16 | 5411 | else |
fa6a6949 | 5412 | Size_Comp := |
cc60bd16 | 5413 | Unchecked_Convert_To (RTE (RE_Size_Ptr), |
5414 | Make_Attribute_Reference (Loc, | |
02a2406d | 5415 | Prefix => New_Occurrence_Of (Prim, Loc), |
fa6a6949 | 5416 | Attribute_Name => Name_Unrestricted_Access)); |
cc60bd16 | 5417 | end if; |
5418 | ||
5419 | exit; | |
5420 | end if; | |
5421 | ||
5422 | Next_Elmt (Prim_Elmt); | |
5423 | end loop; | |
fa6a6949 | 5424 | |
5425 | pragma Assert (Present (Size_Comp)); | |
5426 | Append_To (TSD_Aggr_List, Size_Comp); | |
cc60bd16 | 5427 | end; |
5428 | end if; | |
5429 | end if; | |
5430 | ||
725a69d2 | 5431 | -- Interfaces_Table (required for AI-405) |
5432 | ||
5433 | if RTE_Record_Component_Available (RE_Interfaces_Table) then | |
5434 | ||
5435 | -- Count the number of interface types implemented by Typ | |
5436 | ||
a652dd51 | 5437 | Collect_Interfaces (Typ, Typ_Ifaces); |
725a69d2 | 5438 | |
5439 | AI := First_Elmt (Typ_Ifaces); | |
5440 | while Present (AI) loop | |
5441 | Num_Ifaces := Num_Ifaces + 1; | |
5442 | Next_Elmt (AI); | |
5443 | end loop; | |
952af0b9 | 5444 | |
343d35dc | 5445 | if Num_Ifaces = 0 then |
725a69d2 | 5446 | Iface_Table_Node := Make_Null (Loc); |
952af0b9 | 5447 | |
725a69d2 | 5448 | -- Generate the Interface_Table object |
343d35dc | 5449 | |
5450 | else | |
725a69d2 | 5451 | declare |
40771d7e | 5452 | TSD_Ifaces_List : constant List_Id := New_List; |
5453 | Elmt : Elmt_Id; | |
912e88cc | 5454 | Ifaces_List : Elist_Id := No_Elist; |
5455 | Ifaces_Comp_List : Elist_Id := No_Elist; | |
40771d7e | 5456 | Ifaces_Tag_List : Elist_Id; |
5457 | Offset_To_Top : Node_Id; | |
5458 | Sec_DT_Tag : Node_Id; | |
725a69d2 | 5459 | |
5460 | begin | |
40771d7e | 5461 | -- Collect interfaces information if we need to compute the |
5462 | -- offset to the top using the dummy object. | |
5463 | ||
5464 | if Present (Dummy_Object) then | |
5465 | Collect_Interfaces_Info (Typ, | |
5466 | Ifaces_List, Ifaces_Comp_List, Ifaces_Tag_List); | |
5467 | end if; | |
5468 | ||
725a69d2 | 5469 | AI := First_Elmt (Typ_Ifaces); |
5470 | while Present (AI) loop | |
cb4af01d | 5471 | if Is_Ancestor (Node (AI), Typ, Use_Full_View => True) then |
f7c9b330 | 5472 | Sec_DT_Tag := New_Occurrence_Of (DT_Ptr, Loc); |
5473 | ||
cdb1c38f | 5474 | else |
acf97c11 | 5475 | Elmt := |
5476 | Next_Elmt | |
5477 | (Next_Elmt (First_Elmt (Access_Disp_Table (Typ)))); | |
cdb1c38f | 5478 | pragma Assert (Has_Thunks (Node (Elmt))); |
5479 | ||
d00681a7 | 5480 | while Is_Tag (Node (Elmt)) |
f7c9b330 | 5481 | and then not |
5482 | Is_Ancestor (Node (AI), Related_Type (Node (Elmt)), | |
5483 | Use_Full_View => True) | |
cdb1c38f | 5484 | loop |
5485 | pragma Assert (Has_Thunks (Node (Elmt))); | |
5486 | Next_Elmt (Elmt); | |
acf97c11 | 5487 | pragma Assert (Has_Thunks (Node (Elmt))); |
5488 | Next_Elmt (Elmt); | |
5489 | pragma Assert (not Has_Thunks (Node (Elmt))); | |
5490 | Next_Elmt (Elmt); | |
cdb1c38f | 5491 | pragma Assert (not Has_Thunks (Node (Elmt))); |
5492 | Next_Elmt (Elmt); | |
5493 | end loop; | |
5494 | ||
5495 | pragma Assert (Ekind (Node (Elmt)) = E_Constant | |
acf97c11 | 5496 | and then not |
5497 | Has_Thunks (Node (Next_Elmt (Next_Elmt (Elmt))))); | |
f7c9b330 | 5498 | |
cdb1c38f | 5499 | Sec_DT_Tag := |
f7c9b330 | 5500 | New_Occurrence_Of |
5501 | (Node (Next_Elmt (Next_Elmt (Elmt))), Loc); | |
cdb1c38f | 5502 | end if; |
5503 | ||
40771d7e | 5504 | -- For static dispatch tables compute Offset_To_Top using |
5505 | -- the dummy object. | |
5506 | ||
5507 | if Present (Dummy_Object) then | |
5508 | declare | |
5509 | Iface : constant Node_Id := Node (AI); | |
5510 | Iface_Comp : Node_Id := Empty; | |
5511 | Iface_Comp_Elmt : Elmt_Id; | |
5512 | Iface_Elmt : Elmt_Id; | |
5513 | ||
5514 | begin | |
5515 | Iface_Elmt := First_Elmt (Ifaces_List); | |
5516 | Iface_Comp_Elmt := First_Elmt (Ifaces_Comp_List); | |
5517 | ||
5518 | while Present (Iface_Elmt) loop | |
5519 | if Node (Iface_Elmt) = Iface then | |
5520 | Iface_Comp := Node (Iface_Comp_Elmt); | |
5521 | exit; | |
5522 | end if; | |
5523 | ||
5524 | Next_Elmt (Iface_Elmt); | |
5525 | Next_Elmt (Iface_Comp_Elmt); | |
5526 | end loop; | |
f7c9b330 | 5527 | |
40771d7e | 5528 | pragma Assert (Present (Iface_Comp)); |
5529 | ||
5530 | Offset_To_Top := | |
5531 | Make_Op_Minus (Loc, | |
5532 | Make_Attribute_Reference (Loc, | |
5533 | Prefix => | |
5534 | Make_Selected_Component (Loc, | |
5535 | Prefix => | |
5536 | New_Occurrence_Of (Dummy_Object, Loc), | |
5537 | Selector_Name => | |
5538 | New_Occurrence_Of (Iface_Comp, Loc)), | |
5539 | Attribute_Name => Name_Position)); | |
5540 | end; | |
5541 | else | |
5542 | Offset_To_Top := Make_Integer_Literal (Loc, 0); | |
5543 | end if; | |
5544 | ||
17e14451 | 5545 | Append_To (TSD_Ifaces_List, |
f7c9b330 | 5546 | Make_Aggregate (Loc, |
5547 | Expressions => New_List ( | |
17e14451 | 5548 | |
5549 | -- Iface_Tag | |
5550 | ||
24971415 | 5551 | Unchecked_Convert_To (RTE (RE_Tag), |
83c6c069 | 5552 | New_Occurrence_Of |
725a69d2 | 5553 | (Node (First_Elmt (Access_Disp_Table (Node (AI)))), |
17e14451 | 5554 | Loc)), |
725a69d2 | 5555 | |
17e14451 | 5556 | -- Static_Offset_To_Top |
725a69d2 | 5557 | |
83c6c069 | 5558 | New_Occurrence_Of (Standard_True, Loc), |
725a69d2 | 5559 | |
17e14451 | 5560 | -- Offset_To_Top_Value |
5561 | ||
40771d7e | 5562 | Offset_To_Top, |
17e14451 | 5563 | |
5564 | -- Offset_To_Top_Func | |
5565 | ||
cdb1c38f | 5566 | Make_Null (Loc), |
5567 | ||
5568 | -- Secondary_DT | |
5569 | ||
f7c9b330 | 5570 | Unchecked_Convert_To (RTE (RE_Tag), Sec_DT_Tag)))); |
725a69d2 | 5571 | |
725a69d2 | 5572 | Next_Elmt (AI); |
5573 | end loop; | |
725a69d2 | 5574 | |
17e14451 | 5575 | Name_ITable := New_External_Name (Tname, 'I'); |
5576 | ITable := Make_Defining_Identifier (Loc, Name_ITable); | |
2ea346ac | 5577 | Set_Is_Statically_Allocated (ITable, |
5578 | Is_Library_Level_Tagged_Type (Typ)); | |
725a69d2 | 5579 | |
40771d7e | 5580 | -- The table of interfaces is constant if we are building a |
5581 | -- static dispatch table; otherwise is not constant because | |
5582 | -- its slots are filled at run time by the IP routine. | |
725a69d2 | 5583 | |
17e14451 | 5584 | Append_To (Result, |
5585 | Make_Object_Declaration (Loc, | |
5586 | Defining_Identifier => ITable, | |
5587 | Aliased_Present => True, | |
40771d7e | 5588 | Constant_Present => Present (Dummy_Object), |
17e14451 | 5589 | Object_Definition => |
5590 | Make_Subtype_Indication (Loc, | |
5591 | Subtype_Mark => | |
83c6c069 | 5592 | New_Occurrence_Of (RTE (RE_Interface_Data), Loc), |
02a2406d | 5593 | Constraint => |
5594 | Make_Index_Or_Discriminant_Constraint (Loc, | |
5595 | Constraints => New_List ( | |
5596 | Make_Integer_Literal (Loc, Num_Ifaces)))), | |
725a69d2 | 5597 | |
f7c9b330 | 5598 | Expression => |
5599 | Make_Aggregate (Loc, | |
5600 | Expressions => New_List ( | |
5601 | Make_Integer_Literal (Loc, Num_Ifaces), | |
5602 | Make_Aggregate (Loc, TSD_Ifaces_List))))); | |
725a69d2 | 5603 | |
17e14451 | 5604 | Append_To (Result, |
5605 | Make_Attribute_Definition_Clause (Loc, | |
83c6c069 | 5606 | Name => New_Occurrence_Of (ITable, Loc), |
17e14451 | 5607 | Chars => Name_Alignment, |
5608 | Expression => | |
5609 | Make_Attribute_Reference (Loc, | |
02a2406d | 5610 | Prefix => |
83c6c069 | 5611 | New_Occurrence_Of (RTE (RE_Integer_Address), Loc), |
17e14451 | 5612 | Attribute_Name => Name_Alignment))); |
725a69d2 | 5613 | |
17e14451 | 5614 | Iface_Table_Node := |
5615 | Make_Attribute_Reference (Loc, | |
83c6c069 | 5616 | Prefix => New_Occurrence_Of (ITable, Loc), |
17e14451 | 5617 | Attribute_Name => Name_Unchecked_Access); |
5618 | end; | |
725a69d2 | 5619 | end if; |
5620 | ||
17e14451 | 5621 | Append_To (TSD_Aggr_List, Iface_Table_Node); |
725a69d2 | 5622 | end if; |
5623 | ||
5624 | -- Generate the Select Specific Data table for synchronized types that | |
5625 | -- implement synchronized interfaces. The size of the table is | |
5626 | -- constrained by the number of non-predefined primitive operations. | |
5627 | ||
5628 | if RTE_Record_Component_Available (RE_SSD) then | |
de54c5ab | 5629 | if Ada_Version >= Ada_2005 |
24971415 | 5630 | and then Has_DT (Typ) |
725a69d2 | 5631 | and then Is_Concurrent_Record_Type (Typ) |
a652dd51 | 5632 | and then Has_Interfaces (Typ) |
725a69d2 | 5633 | and then Nb_Prim > 0 |
5634 | and then not Is_Abstract_Type (Typ) | |
5635 | and then not Is_Controlled (Typ) | |
5636 | and then not Restriction_Active (No_Dispatching_Calls) | |
f38c8084 | 5637 | and then not Restriction_Active (No_Select_Statements) |
725a69d2 | 5638 | then |
343d35dc | 5639 | Append_To (Result, |
5640 | Make_Object_Declaration (Loc, | |
725a69d2 | 5641 | Defining_Identifier => SSD, |
343d35dc | 5642 | Aliased_Present => True, |
5643 | Object_Definition => | |
5644 | Make_Subtype_Indication (Loc, | |
83c6c069 | 5645 | Subtype_Mark => New_Occurrence_Of ( |
725a69d2 | 5646 | RTE (RE_Select_Specific_Data), Loc), |
5647 | Constraint => | |
5648 | Make_Index_Or_Discriminant_Constraint (Loc, | |
5649 | Constraints => New_List ( | |
5650 | Make_Integer_Literal (Loc, Nb_Prim)))))); | |
5651 | ||
17e14451 | 5652 | Append_To (Result, |
5653 | Make_Attribute_Definition_Clause (Loc, | |
83c6c069 | 5654 | Name => New_Occurrence_Of (SSD, Loc), |
17e14451 | 5655 | Chars => Name_Alignment, |
5656 | Expression => | |
5657 | Make_Attribute_Reference (Loc, | |
02a2406d | 5658 | Prefix => |
83c6c069 | 5659 | New_Occurrence_Of (RTE (RE_Integer_Address), Loc), |
17e14451 | 5660 | Attribute_Name => Name_Alignment))); |
5661 | ||
725a69d2 | 5662 | -- This table is initialized by Make_Select_Specific_Data_Table, |
5663 | -- which calls Set_Entry_Index and Set_Prim_Op_Kind. | |
5664 | ||
5665 | Append_To (TSD_Aggr_List, | |
17e14451 | 5666 | Make_Attribute_Reference (Loc, |
02a2406d | 5667 | Prefix => New_Occurrence_Of (SSD, Loc), |
17e14451 | 5668 | Attribute_Name => Name_Unchecked_Access)); |
725a69d2 | 5669 | else |
17e14451 | 5670 | Append_To (TSD_Aggr_List, Make_Null (Loc)); |
343d35dc | 5671 | end if; |
952af0b9 | 5672 | end if; |
5673 | ||
725a69d2 | 5674 | -- Initialize the table of ancestor tags. In case of interface types |
5675 | -- this table is not needed. | |
d62940bf | 5676 | |
cc60bd16 | 5677 | TSD_Tags_List := New_List; |
952af0b9 | 5678 | |
cc60bd16 | 5679 | -- If we are not statically allocating the dispatch table then we must |
5680 | -- fill position 0 with null because we still have not generated the | |
5681 | -- tag of Typ. | |
343d35dc | 5682 | |
cc60bd16 | 5683 | if not Building_Static_DT (Typ) |
5684 | or else Is_Interface (Typ) | |
5685 | then | |
5686 | Append_To (TSD_Tags_List, | |
5687 | Unchecked_Convert_To (RTE (RE_Tag), | |
83c6c069 | 5688 | New_Occurrence_Of (RTE (RE_Null_Address), Loc))); |
343d35dc | 5689 | |
cc60bd16 | 5690 | -- Otherwise we can safely reference the tag |
343d35dc | 5691 | |
cc60bd16 | 5692 | else |
5693 | Append_To (TSD_Tags_List, | |
83c6c069 | 5694 | New_Occurrence_Of (DT_Ptr, Loc)); |
cc60bd16 | 5695 | end if; |
343d35dc | 5696 | |
cc60bd16 | 5697 | -- Fill the rest of the table with the tags of the ancestors |
343d35dc | 5698 | |
cc60bd16 | 5699 | declare |
5700 | Current_Typ : Entity_Id; | |
5701 | Parent_Typ : Entity_Id; | |
5702 | Pos : Nat; | |
725a69d2 | 5703 | |
cc60bd16 | 5704 | begin |
17e14451 | 5705 | Pos := 1; |
5706 | Current_Typ := Typ; | |
725a69d2 | 5707 | |
17e14451 | 5708 | loop |
5709 | Parent_Typ := Etype (Current_Typ); | |
343d35dc | 5710 | |
17e14451 | 5711 | if Is_Private_Type (Parent_Typ) then |
5712 | Parent_Typ := Full_View (Base_Type (Parent_Typ)); | |
5713 | end if; | |
5714 | ||
5715 | exit when Parent_Typ = Current_Typ; | |
5716 | ||
7ac0f4a5 | 5717 | if Is_CPP_Class (Parent_Typ) then |
5718 | ||
17e14451 | 5719 | -- The tags defined in the C++ side will be inherited when |
5720 | -- the object is constructed (Exp_Ch3.Build_Init_Procedure) | |
5721 | ||
5722 | Append_To (TSD_Tags_List, | |
5723 | Unchecked_Convert_To (RTE (RE_Tag), | |
83c6c069 | 5724 | New_Occurrence_Of (RTE (RE_Null_Address), Loc))); |
17e14451 | 5725 | else |
5726 | Append_To (TSD_Tags_List, | |
83c6c069 | 5727 | New_Occurrence_Of |
17e14451 | 5728 | (Node (First_Elmt (Access_Disp_Table (Parent_Typ))), |
5729 | Loc)); | |
5730 | end if; | |
5731 | ||
5732 | Pos := Pos + 1; | |
5733 | Current_Typ := Parent_Typ; | |
5734 | end loop; | |
5735 | ||
5736 | pragma Assert (Pos = I_Depth + 1); | |
5737 | end; | |
5738 | ||
5739 | Append_To (TSD_Aggr_List, | |
5740 | Make_Aggregate (Loc, | |
5741 | Expressions => TSD_Tags_List)); | |
343d35dc | 5742 | |
725a69d2 | 5743 | -- Build the TSD object |
343d35dc | 5744 | |
5745 | Append_To (Result, | |
5746 | Make_Object_Declaration (Loc, | |
5747 | Defining_Identifier => TSD, | |
5748 | Aliased_Present => True, | |
24971415 | 5749 | Constant_Present => Building_Static_DT (Typ), |
343d35dc | 5750 | Object_Definition => |
5751 | Make_Subtype_Indication (Loc, | |
83c6c069 | 5752 | Subtype_Mark => New_Occurrence_Of ( |
343d35dc | 5753 | RTE (RE_Type_Specific_Data), Loc), |
5754 | Constraint => | |
5755 | Make_Index_Or_Discriminant_Constraint (Loc, | |
5756 | Constraints => New_List ( | |
5757 | Make_Integer_Literal (Loc, I_Depth)))), | |
725a69d2 | 5758 | |
343d35dc | 5759 | Expression => Make_Aggregate (Loc, |
17e14451 | 5760 | Expressions => TSD_Aggr_List))); |
343d35dc | 5761 | |
24971415 | 5762 | Set_Is_True_Constant (TSD, Building_Static_DT (Typ)); |
5763 | ||
343d35dc | 5764 | Append_To (Result, |
5765 | Make_Attribute_Definition_Clause (Loc, | |
83c6c069 | 5766 | Name => New_Occurrence_Of (TSD, Loc), |
343d35dc | 5767 | Chars => Name_Alignment, |
5768 | Expression => | |
5769 | Make_Attribute_Reference (Loc, | |
02a2406d | 5770 | Prefix => |
5771 | New_Occurrence_Of (RTE (RE_Integer_Address), Loc), | |
343d35dc | 5772 | Attribute_Name => Name_Alignment))); |
5773 | ||
24971415 | 5774 | -- Initialize or declare the dispatch table object |
343d35dc | 5775 | |
24971415 | 5776 | if not Has_DT (Typ) then |
725a69d2 | 5777 | DT_Constr_List := New_List; |
5778 | DT_Aggr_List := New_List; | |
343d35dc | 5779 | |
725a69d2 | 5780 | -- Typeinfo |
952af0b9 | 5781 | |
725a69d2 | 5782 | New_Node := |
5783 | Make_Attribute_Reference (Loc, | |
02a2406d | 5784 | Prefix => New_Occurrence_Of (TSD, Loc), |
725a69d2 | 5785 | Attribute_Name => Name_Address); |
5786 | ||
5787 | Append_To (DT_Constr_List, New_Node); | |
5788 | Append_To (DT_Aggr_List, New_Copy (New_Node)); | |
5789 | Append_To (DT_Aggr_List, Make_Integer_Literal (Loc, 0)); | |
5790 | ||
5791 | -- In case of locally defined tagged types we have already declared | |
5792 | -- and uninitialized object for the dispatch table, which is now | |
24971415 | 5793 | -- initialized by means of the following assignment: |
5794 | ||
5795 | -- DT := (TSD'Address, 0); | |
725a69d2 | 5796 | |
24971415 | 5797 | if not Building_Static_DT (Typ) then |
725a69d2 | 5798 | Append_To (Result, |
5799 | Make_Assignment_Statement (Loc, | |
02a2406d | 5800 | Name => New_Occurrence_Of (DT, Loc), |
5801 | Expression => Make_Aggregate (Loc, DT_Aggr_List))); | |
725a69d2 | 5802 | |
24971415 | 5803 | -- In case of library level tagged types we declare and export now |
5804 | -- the constant object containing the dummy dispatch table. There | |
5805 | -- is no need to declare the tag here because it has been previously | |
5806 | -- declared by Make_Tags | |
5807 | ||
5808 | -- DT : aliased constant No_Dispatch_Table := | |
5809 | -- (NDT_TSD => TSD'Address; | |
5810 | -- NDT_Prims_Ptr => 0); | |
5811 | -- for DT'Alignment use Address'Alignment; | |
725a69d2 | 5812 | |
5813 | else | |
5814 | Append_To (Result, | |
5815 | Make_Object_Declaration (Loc, | |
5816 | Defining_Identifier => DT, | |
5817 | Aliased_Present => True, | |
17e14451 | 5818 | Constant_Present => True, |
725a69d2 | 5819 | Object_Definition => |
83c6c069 | 5820 | New_Occurrence_Of (RTE (RE_No_Dispatch_Table_Wrapper), Loc), |
02a2406d | 5821 | Expression => Make_Aggregate (Loc, DT_Aggr_List))); |
725a69d2 | 5822 | |
17e14451 | 5823 | Append_To (Result, |
5824 | Make_Attribute_Definition_Clause (Loc, | |
83c6c069 | 5825 | Name => New_Occurrence_Of (DT, Loc), |
17e14451 | 5826 | Chars => Name_Alignment, |
5827 | Expression => | |
5828 | Make_Attribute_Reference (Loc, | |
02a2406d | 5829 | Prefix => |
83c6c069 | 5830 | New_Occurrence_Of (RTE (RE_Integer_Address), Loc), |
17e14451 | 5831 | Attribute_Name => Name_Alignment))); |
5832 | ||
24971415 | 5833 | Export_DT (Typ, DT); |
725a69d2 | 5834 | end if; |
5835 | ||
5836 | -- Common case: Typ has a dispatch table | |
5837 | ||
5838 | -- Generate: | |
5839 | ||
5840 | -- Predef_Prims : Address_Array (1 .. Default_Prim_Ops_Count) := | |
5841 | -- (predef-prim-op-1'address, | |
5842 | -- predef-prim-op-2'address, | |
5843 | -- ... | |
5844 | -- predef-prim-op-n'address); | |
5845 | -- for Predef_Prims'Alignment use Address'Alignment | |
5846 | ||
5847 | -- DT : Dispatch_Table (Nb_Prims) := | |
5848 | -- (Signature => <sig-value>, | |
5849 | -- Tag_Kind => <tag_kind-value>, | |
5850 | -- Predef_Prims => Predef_Prims'First'Address, | |
5851 | -- Offset_To_Top => 0, | |
5852 | -- TSD => TSD'Address; | |
5853 | -- Prims_Ptr => (prim-op-1'address, | |
5854 | -- prim-op-2'address, | |
5855 | -- ... | |
5856 | -- prim-op-n'address)); | |
17e14451 | 5857 | -- for DT'Alignment use Address'Alignment |
725a69d2 | 5858 | |
5859 | else | |
5860 | declare | |
5861 | Pos : Nat; | |
5862 | ||
5863 | begin | |
24971415 | 5864 | if not Building_Static_DT (Typ) then |
725a69d2 | 5865 | Nb_Predef_Prims := Max_Predef_Prims; |
5866 | ||
5867 | else | |
5868 | Prim_Elmt := First_Elmt (Primitive_Operations (Typ)); | |
5869 | while Present (Prim_Elmt) loop | |
5870 | Prim := Node (Prim_Elmt); | |
5871 | ||
5872 | if Is_Predefined_Dispatching_Operation (Prim) | |
5873 | and then not Is_Abstract_Subprogram (Prim) | |
5874 | then | |
5875 | Pos := UI_To_Int (DT_Position (Prim)); | |
5876 | ||
5877 | if Pos > Nb_Predef_Prims then | |
5878 | Nb_Predef_Prims := Pos; | |
5879 | end if; | |
5880 | end if; | |
5881 | ||
5882 | Next_Elmt (Prim_Elmt); | |
5883 | end loop; | |
5884 | end if; | |
5885 | ||
5886 | declare | |
5887 | Prim_Table : array | |
5888 | (Nat range 1 .. Nb_Predef_Prims) of Entity_Id; | |
cc60bd16 | 5889 | Decl : Node_Id; |
725a69d2 | 5890 | E : Entity_Id; |
5891 | ||
5892 | begin | |
5893 | Prim_Ops_Aggr_List := New_List; | |
5894 | ||
5895 | Prim_Table := (others => Empty); | |
17e14451 | 5896 | |
cdb1c38f | 5897 | if Building_Static_DT (Typ) then |
5898 | Prim_Elmt := First_Elmt (Primitive_Operations (Typ)); | |
5899 | while Present (Prim_Elmt) loop | |
5900 | Prim := Node (Prim_Elmt); | |
725a69d2 | 5901 | |
cdb1c38f | 5902 | if Is_Predefined_Dispatching_Operation (Prim) |
5903 | and then not Is_Abstract_Subprogram (Prim) | |
3f8cf2d2 | 5904 | and then not Is_Eliminated (Prim) |
cdb1c38f | 5905 | and then not Present (Prim_Table |
5906 | (UI_To_Int (DT_Position (Prim)))) | |
5907 | then | |
fc2907f6 | 5908 | E := Ultimate_Alias (Prim); |
cdb1c38f | 5909 | pragma Assert (not Is_Abstract_Subprogram (E)); |
5910 | Prim_Table (UI_To_Int (DT_Position (Prim))) := E; | |
5911 | end if; | |
725a69d2 | 5912 | |
cdb1c38f | 5913 | Next_Elmt (Prim_Elmt); |
5914 | end loop; | |
5915 | end if; | |
725a69d2 | 5916 | |
5917 | for J in Prim_Table'Range loop | |
5918 | if Present (Prim_Table (J)) then | |
5919 | New_Node := | |
cc60bd16 | 5920 | Unchecked_Convert_To (RTE (RE_Prim_Ptr), |
acf97c11 | 5921 | Make_Attribute_Reference (Loc, |
02a2406d | 5922 | Prefix => |
5923 | New_Occurrence_Of (Prim_Table (J), Loc), | |
acf97c11 | 5924 | Attribute_Name => Name_Unrestricted_Access)); |
725a69d2 | 5925 | else |
cc60bd16 | 5926 | New_Node := Make_Null (Loc); |
725a69d2 | 5927 | end if; |
5928 | ||
5929 | Append_To (Prim_Ops_Aggr_List, New_Node); | |
5930 | end loop; | |
343d35dc | 5931 | |
cc60bd16 | 5932 | New_Node := |
5933 | Make_Aggregate (Loc, | |
5934 | Expressions => Prim_Ops_Aggr_List); | |
5935 | ||
5936 | Decl := | |
5937 | Make_Subtype_Declaration (Loc, | |
ec97ce79 | 5938 | Defining_Identifier => Make_Temporary (Loc, 'S'), |
5939 | Subtype_Indication => | |
83c6c069 | 5940 | New_Occurrence_Of (RTE (RE_Address_Array), Loc)); |
cc60bd16 | 5941 | |
5942 | Append_To (Result, Decl); | |
5943 | ||
68f95949 | 5944 | Append_To (Result, |
5945 | Make_Object_Declaration (Loc, | |
725a69d2 | 5946 | Defining_Identifier => Predef_Prims, |
68f95949 | 5947 | Aliased_Present => True, |
24971415 | 5948 | Constant_Present => Building_Static_DT (Typ), |
02a2406d | 5949 | Object_Definition => |
5950 | New_Occurrence_Of (Defining_Identifier (Decl), Loc), | |
cc60bd16 | 5951 | Expression => New_Node)); |
5952 | ||
5953 | -- Remember aggregates initializing dispatch tables | |
5954 | ||
5955 | Append_Elmt (New_Node, DT_Aggr); | |
725a69d2 | 5956 | |
5957 | Append_To (Result, | |
5958 | Make_Attribute_Definition_Clause (Loc, | |
83c6c069 | 5959 | Name => New_Occurrence_Of (Predef_Prims, Loc), |
725a69d2 | 5960 | Chars => Name_Alignment, |
5961 | Expression => | |
5962 | Make_Attribute_Reference (Loc, | |
02a2406d | 5963 | Prefix => |
83c6c069 | 5964 | New_Occurrence_Of (RTE (RE_Integer_Address), Loc), |
725a69d2 | 5965 | Attribute_Name => Name_Alignment))); |
5966 | end; | |
5967 | end; | |
5968 | ||
5969 | -- Stage 1: Initialize the discriminant and the record components | |
5970 | ||
5971 | DT_Constr_List := New_List; | |
5972 | DT_Aggr_List := New_List; | |
5973 | ||
5974 | -- Num_Prims. If the tagged type has no primitives we add a dummy | |
5975 | -- slot whose address will be the tag of this type. | |
5976 | ||
5977 | if Nb_Prim = 0 then | |
5978 | New_Node := Make_Integer_Literal (Loc, 1); | |
5979 | else | |
5980 | New_Node := Make_Integer_Literal (Loc, Nb_Prim); | |
5981 | end if; | |
5982 | ||
5983 | Append_To (DT_Constr_List, New_Node); | |
5984 | Append_To (DT_Aggr_List, New_Copy (New_Node)); | |
5985 | ||
5986 | -- Signature | |
5987 | ||
5988 | if RTE_Record_Component_Available (RE_Signature) then | |
5989 | Append_To (DT_Aggr_List, | |
83c6c069 | 5990 | New_Occurrence_Of (RTE (RE_Primary_DT), Loc)); |
725a69d2 | 5991 | end if; |
5992 | ||
5993 | -- Tag_Kind | |
5994 | ||
5995 | if RTE_Record_Component_Available (RE_Tag_Kind) then | |
5996 | Append_To (DT_Aggr_List, Tagged_Kind (Typ)); | |
5997 | end if; | |
5998 | ||
5999 | -- Predef_Prims | |
6000 | ||
6001 | Append_To (DT_Aggr_List, | |
6002 | Make_Attribute_Reference (Loc, | |
02a2406d | 6003 | Prefix => New_Occurrence_Of (Predef_Prims, Loc), |
725a69d2 | 6004 | Attribute_Name => Name_Address)); |
6005 | ||
6006 | -- Offset_To_Top | |
6007 | ||
cc60bd16 | 6008 | Append_To (DT_Aggr_List, Make_Integer_Literal (Loc, 0)); |
725a69d2 | 6009 | |
6010 | -- Typeinfo | |
6011 | ||
6012 | Append_To (DT_Aggr_List, | |
6013 | Make_Attribute_Reference (Loc, | |
02a2406d | 6014 | Prefix => New_Occurrence_Of (TSD, Loc), |
725a69d2 | 6015 | Attribute_Name => Name_Address)); |
6016 | ||
f117057b | 6017 | -- Stage 2: Initialize the table of user-defined primitive operations |
725a69d2 | 6018 | |
6019 | Prim_Ops_Aggr_List := New_List; | |
6020 | ||
6021 | if Nb_Prim = 0 then | |
cc60bd16 | 6022 | Append_To (Prim_Ops_Aggr_List, Make_Null (Loc)); |
725a69d2 | 6023 | |
9a479e51 | 6024 | elsif not Building_Static_DT (Typ) then |
725a69d2 | 6025 | for J in 1 .. Nb_Prim loop |
cc60bd16 | 6026 | Append_To (Prim_Ops_Aggr_List, Make_Null (Loc)); |
725a69d2 | 6027 | end loop; |
6028 | ||
6029 | else | |
6030 | declare | |
d00681a7 | 6031 | CPP_Nb_Prims : constant Nat := CPP_Num_Prims (Typ); |
6032 | E : Entity_Id; | |
6033 | Prim : Entity_Id; | |
6034 | Prim_Elmt : Elmt_Id; | |
6035 | Prim_Pos : Nat; | |
6036 | Prim_Table : array (Nat range 1 .. Nb_Prim) of Entity_Id; | |
725a69d2 | 6037 | |
6038 | begin | |
6039 | Prim_Table := (others => Empty); | |
cdb1c38f | 6040 | |
6041 | Prim_Elmt := First_Elmt (Primitive_Operations (Typ)); | |
725a69d2 | 6042 | while Present (Prim_Elmt) loop |
6043 | Prim := Node (Prim_Elmt); | |
6044 | ||
9429b6e9 | 6045 | -- Retrieve the ultimate alias of the primitive for proper |
6046 | -- handling of renamings and eliminated primitives. | |
6047 | ||
78f327e2 | 6048 | E := Ultimate_Alias (Prim); |
ed7f78d7 | 6049 | |
6050 | -- If the alias is not a primitive operation then Prim does | |
6051 | -- not rename another primitive, but rather an operation | |
6052 | -- declared elsewhere (e.g. in another scope) and therefore | |
6053 | -- Prim is a new primitive. | |
6054 | ||
6055 | if No (Find_Dispatching_Type (E)) then | |
6056 | E := Prim; | |
6057 | end if; | |
6058 | ||
d00681a7 | 6059 | Prim_Pos := UI_To_Int (DT_Position (E)); |
9429b6e9 | 6060 | |
f9e26ff7 | 6061 | -- Skip predefined primitives because they are located in a |
6062 | -- separate dispatch table. | |
725a69d2 | 6063 | |
3f8cf2d2 | 6064 | if not Is_Predefined_Dispatching_Operation (Prim) |
6065 | and then not Is_Predefined_Dispatching_Operation (E) | |
f9e26ff7 | 6066 | |
6067 | -- Skip entities with attribute Interface_Alias because | |
6068 | -- those are only required to build secondary dispatch | |
6069 | -- tables. | |
6070 | ||
3f8cf2d2 | 6071 | and then not Present (Interface_Alias (Prim)) |
f9e26ff7 | 6072 | |
6073 | -- Skip abstract and eliminated primitives | |
6074 | ||
3f8cf2d2 | 6075 | and then not Is_Abstract_Subprogram (E) |
3f8cf2d2 | 6076 | and then not Is_Eliminated (E) |
f9e26ff7 | 6077 | |
6078 | -- For derivations of CPP types skip primitives located in | |
6079 | -- the C++ part of the dispatch table because their slots | |
6080 | -- are initialized by the IC routine. | |
6081 | ||
d00681a7 | 6082 | and then (not Is_CPP_Class (Root_Type (Typ)) |
6083 | or else Prim_Pos > CPP_Nb_Prims) | |
f9e26ff7 | 6084 | |
6085 | -- Skip ignored Ghost subprograms as those will be removed | |
6086 | -- from the executable. | |
6087 | ||
6088 | and then not Is_Ignored_Ghost_Entity (E) | |
3f8cf2d2 | 6089 | then |
6090 | pragma Assert | |
6091 | (UI_To_Int (DT_Position (Prim)) <= Nb_Prim); | |
6092 | ||
6093 | Prim_Table (UI_To_Int (DT_Position (Prim))) := E; | |
725a69d2 | 6094 | end if; |
6095 | ||
6096 | Next_Elmt (Prim_Elmt); | |
6097 | end loop; | |
6098 | ||
6099 | for J in Prim_Table'Range loop | |
6100 | if Present (Prim_Table (J)) then | |
6101 | New_Node := | |
cc60bd16 | 6102 | Unchecked_Convert_To (RTE (RE_Prim_Ptr), |
acf97c11 | 6103 | Make_Attribute_Reference (Loc, |
02a2406d | 6104 | Prefix => |
6105 | New_Occurrence_Of (Prim_Table (J), Loc), | |
acf97c11 | 6106 | Attribute_Name => Name_Unrestricted_Access)); |
725a69d2 | 6107 | else |
cc60bd16 | 6108 | New_Node := Make_Null (Loc); |
725a69d2 | 6109 | end if; |
6110 | ||
6111 | Append_To (Prim_Ops_Aggr_List, New_Node); | |
6112 | end loop; | |
6113 | end; | |
6114 | end if; | |
6115 | ||
cc60bd16 | 6116 | New_Node := |
725a69d2 | 6117 | Make_Aggregate (Loc, |
cc60bd16 | 6118 | Expressions => Prim_Ops_Aggr_List); |
6119 | ||
6120 | Append_To (DT_Aggr_List, New_Node); | |
6121 | ||
6122 | -- Remember aggregates initializing dispatch tables | |
6123 | ||
6124 | Append_Elmt (New_Node, DT_Aggr); | |
725a69d2 | 6125 | |
6126 | -- In case of locally defined tagged types we have already declared | |
6127 | -- and uninitialized object for the dispatch table, which is now | |
6128 | -- initialized by means of an assignment. | |
6129 | ||
24971415 | 6130 | if not Building_Static_DT (Typ) then |
725a69d2 | 6131 | Append_To (Result, |
6132 | Make_Assignment_Statement (Loc, | |
02a2406d | 6133 | Name => New_Occurrence_Of (DT, Loc), |
6134 | Expression => Make_Aggregate (Loc, DT_Aggr_List))); | |
725a69d2 | 6135 | |
24971415 | 6136 | -- In case of library level tagged types we declare now and export |
6137 | -- the constant object containing the dispatch table. | |
725a69d2 | 6138 | |
6139 | else | |
6140 | Append_To (Result, | |
6141 | Make_Object_Declaration (Loc, | |
6142 | Defining_Identifier => DT, | |
6143 | Aliased_Present => True, | |
17e14451 | 6144 | Constant_Present => True, |
725a69d2 | 6145 | Object_Definition => |
6146 | Make_Subtype_Indication (Loc, | |
83c6c069 | 6147 | Subtype_Mark => New_Occurrence_Of |
725a69d2 | 6148 | (RTE (RE_Dispatch_Table_Wrapper), Loc), |
6149 | Constraint => Make_Index_Or_Discriminant_Constraint (Loc, | |
6150 | Constraints => DT_Constr_List)), | |
02a2406d | 6151 | Expression => Make_Aggregate (Loc, DT_Aggr_List))); |
725a69d2 | 6152 | |
6153 | Append_To (Result, | |
6154 | Make_Attribute_Definition_Clause (Loc, | |
83c6c069 | 6155 | Name => New_Occurrence_Of (DT, Loc), |
725a69d2 | 6156 | Chars => Name_Alignment, |
6157 | Expression => | |
6158 | Make_Attribute_Reference (Loc, | |
02a2406d | 6159 | Prefix => |
83c6c069 | 6160 | New_Occurrence_Of (RTE (RE_Integer_Address), Loc), |
725a69d2 | 6161 | Attribute_Name => Name_Alignment))); |
6162 | ||
24971415 | 6163 | Export_DT (Typ, DT); |
952af0b9 | 6164 | end if; |
76a1c25b | 6165 | end if; |
d62940bf | 6166 | |
f301a57b | 6167 | -- Initialize the table of ancestor tags if not building static |
6168 | -- dispatch table | |
725a69d2 | 6169 | |
24971415 | 6170 | if not Building_Static_DT (Typ) |
17e14451 | 6171 | and then not Is_Interface (Typ) |
725a69d2 | 6172 | and then not Is_CPP_Class (Typ) |
6173 | then | |
6174 | Append_To (Result, | |
6175 | Make_Assignment_Statement (Loc, | |
02a2406d | 6176 | Name => |
725a69d2 | 6177 | Make_Indexed_Component (Loc, |
02a2406d | 6178 | Prefix => |
725a69d2 | 6179 | Make_Selected_Component (Loc, |
02a2406d | 6180 | Prefix => New_Occurrence_Of (TSD, Loc), |
725a69d2 | 6181 | Selector_Name => |
83c6c069 | 6182 | New_Occurrence_Of |
725a69d2 | 6183 | (RTE_Record_Component (RE_Tags_Table), Loc)), |
6184 | Expressions => | |
6185 | New_List (Make_Integer_Literal (Loc, 0))), | |
6186 | ||
6187 | Expression => | |
83c6c069 | 6188 | New_Occurrence_Of |
725a69d2 | 6189 | (Node (First_Elmt (Access_Disp_Table (Typ))), Loc))); |
6190 | end if; | |
6191 | ||
f301a57b | 6192 | -- Inherit the dispatch tables of the parent. There is no need to |
6193 | -- inherit anything from the parent when building static dispatch tables | |
6194 | -- because the whole dispatch table (including inherited primitives) has | |
6195 | -- been already built. | |
acf97c11 | 6196 | |
9a479e51 | 6197 | if Building_Static_DT (Typ) then |
725a69d2 | 6198 | null; |
6199 | ||
af647dc7 | 6200 | -- If the ancestor is a CPP_Class type we inherit the dispatch tables |
6201 | -- in the init proc, and we don't need to fill them in here. | |
d62940bf | 6202 | |
cc60bd16 | 6203 | elsif Is_CPP_Class (Parent_Typ) then |
af647dc7 | 6204 | null; |
d62940bf | 6205 | |
acf97c11 | 6206 | -- Otherwise we fill in the dispatch tables here |
d62940bf | 6207 | |
af647dc7 | 6208 | else |
cc60bd16 | 6209 | if Typ /= Parent_Typ |
af647dc7 | 6210 | and then not Is_Interface (Typ) |
6211 | and then not Restriction_Active (No_Dispatching_Calls) | |
68f95949 | 6212 | then |
343d35dc | 6213 | -- Inherit the dispatch table |
d62940bf | 6214 | |
acf97c11 | 6215 | if not Is_Interface (Typ) |
cc60bd16 | 6216 | and then not Is_Interface (Parent_Typ) |
6217 | and then not Is_CPP_Class (Parent_Typ) | |
acf97c11 | 6218 | then |
6219 | declare | |
6220 | Nb_Prims : constant Int := | |
6221 | UI_To_Int (DT_Entry_Count | |
cc60bd16 | 6222 | (First_Tag_Component (Parent_Typ))); |
6223 | ||
acf97c11 | 6224 | begin |
6225 | Append_To (Elab_Code, | |
6226 | Build_Inherit_Predefined_Prims (Loc, | |
6227 | Old_Tag_Node => | |
83c6c069 | 6228 | New_Occurrence_Of |
acf97c11 | 6229 | (Node |
02a2406d | 6230 | (Next_Elmt |
6231 | (First_Elmt | |
6232 | (Access_Disp_Table (Parent_Typ)))), Loc), | |
acf97c11 | 6233 | New_Tag_Node => |
83c6c069 | 6234 | New_Occurrence_Of |
acf97c11 | 6235 | (Node |
02a2406d | 6236 | (Next_Elmt |
6237 | (First_Elmt | |
6238 | (Access_Disp_Table (Typ)))), Loc))); | |
acf97c11 | 6239 | |
6240 | if Nb_Prims /= 0 then | |
725a69d2 | 6241 | Append_To (Elab_Code, |
acf97c11 | 6242 | Build_Inherit_Prims (Loc, |
6243 | Typ => Typ, | |
6244 | Old_Tag_Node => | |
83c6c069 | 6245 | New_Occurrence_Of |
acf97c11 | 6246 | (Node |
02a2406d | 6247 | (First_Elmt |
6248 | (Access_Disp_Table (Parent_Typ))), Loc), | |
83c6c069 | 6249 | New_Tag_Node => New_Occurrence_Of (DT_Ptr, Loc), |
acf97c11 | 6250 | Num_Prims => Nb_Prims)); |
6251 | end if; | |
6252 | end; | |
af647dc7 | 6253 | end if; |
d62940bf | 6254 | |
af647dc7 | 6255 | -- Inherit the secondary dispatch tables of the ancestor |
d62940bf | 6256 | |
cc60bd16 | 6257 | if not Is_CPP_Class (Parent_Typ) then |
af647dc7 | 6258 | declare |
6259 | Sec_DT_Ancestor : Elmt_Id := | |
6260 | Next_Elmt | |
02a2406d | 6261 | (Next_Elmt |
6262 | (First_Elmt | |
6263 | (Access_Disp_Table | |
6264 | (Parent_Typ)))); | |
af647dc7 | 6265 | Sec_DT_Typ : Elmt_Id := |
6266 | Next_Elmt | |
02a2406d | 6267 | (Next_Elmt |
6268 | (First_Elmt | |
6269 | (Access_Disp_Table (Typ)))); | |
af647dc7 | 6270 | |
6271 | procedure Copy_Secondary_DTs (Typ : Entity_Id); | |
6272 | -- Local procedure required to climb through the ancestors | |
6273 | -- and copy the contents of all their secondary dispatch | |
6274 | -- tables. | |
6275 | ||
6276 | ------------------------ | |
6277 | -- Copy_Secondary_DTs -- | |
6278 | ------------------------ | |
6279 | ||
6280 | procedure Copy_Secondary_DTs (Typ : Entity_Id) is | |
6281 | E : Entity_Id; | |
6282 | Iface : Elmt_Id; | |
6283 | ||
6284 | begin | |
6285 | -- Climb to the ancestor (if any) handling private types | |
6286 | ||
6287 | if Present (Full_View (Etype (Typ))) then | |
6288 | if Full_View (Etype (Typ)) /= Typ then | |
6289 | Copy_Secondary_DTs (Full_View (Etype (Typ))); | |
6290 | end if; | |
d62940bf | 6291 | |
af647dc7 | 6292 | elsif Etype (Typ) /= Typ then |
6293 | Copy_Secondary_DTs (Etype (Typ)); | |
6294 | end if; | |
d62940bf | 6295 | |
a652dd51 | 6296 | if Present (Interfaces (Typ)) |
6297 | and then not Is_Empty_Elmt_List (Interfaces (Typ)) | |
af647dc7 | 6298 | then |
a652dd51 | 6299 | Iface := First_Elmt (Interfaces (Typ)); |
af647dc7 | 6300 | E := First_Entity (Typ); |
6301 | while Present (E) | |
6302 | and then Present (Node (Sec_DT_Ancestor)) | |
725a69d2 | 6303 | and then Ekind (Node (Sec_DT_Ancestor)) = E_Constant |
af647dc7 | 6304 | loop |
6305 | if Is_Tag (E) and then Chars (E) /= Name_uTag then | |
cdb1c38f | 6306 | declare |
6307 | Num_Prims : constant Int := | |
6308 | UI_To_Int (DT_Entry_Count (E)); | |
6309 | ||
6310 | begin | |
6311 | if not Is_Interface (Etype (Typ)) then | |
6312 | ||
6313 | -- Inherit first secondary dispatch table | |
6314 | ||
6315 | Append_To (Elab_Code, | |
6316 | Build_Inherit_Predefined_Prims (Loc, | |
6317 | Old_Tag_Node => | |
6318 | Unchecked_Convert_To (RTE (RE_Tag), | |
83c6c069 | 6319 | New_Occurrence_Of |
acf97c11 | 6320 | (Node |
6321 | (Next_Elmt (Sec_DT_Ancestor)), | |
6322 | Loc)), | |
cdb1c38f | 6323 | New_Tag_Node => |
6324 | Unchecked_Convert_To (RTE (RE_Tag), | |
83c6c069 | 6325 | New_Occurrence_Of |
acf97c11 | 6326 | (Node (Next_Elmt (Sec_DT_Typ)), |
6327 | Loc)))); | |
cdb1c38f | 6328 | |
6329 | if Num_Prims /= 0 then | |
6330 | Append_To (Elab_Code, | |
6331 | Build_Inherit_Prims (Loc, | |
6332 | Typ => Node (Iface), | |
6333 | Old_Tag_Node => | |
6334 | Unchecked_Convert_To | |
6335 | (RTE (RE_Tag), | |
83c6c069 | 6336 | New_Occurrence_Of |
cdb1c38f | 6337 | (Node (Sec_DT_Ancestor), |
6338 | Loc)), | |
6339 | New_Tag_Node => | |
6340 | Unchecked_Convert_To | |
6341 | (RTE (RE_Tag), | |
83c6c069 | 6342 | New_Occurrence_Of |
cdb1c38f | 6343 | (Node (Sec_DT_Typ), Loc)), |
6344 | Num_Prims => Num_Prims)); | |
6345 | end if; | |
6346 | end if; | |
6347 | ||
6348 | Next_Elmt (Sec_DT_Ancestor); | |
6349 | Next_Elmt (Sec_DT_Typ); | |
343d35dc | 6350 | |
acf97c11 | 6351 | -- Skip the secondary dispatch table of |
6352 | -- predefined primitives | |
6353 | ||
6354 | Next_Elmt (Sec_DT_Ancestor); | |
6355 | Next_Elmt (Sec_DT_Typ); | |
6356 | ||
cdb1c38f | 6357 | if not Is_Interface (Etype (Typ)) then |
6358 | ||
6359 | -- Inherit second secondary dispatch table | |
343d35dc | 6360 | |
343d35dc | 6361 | Append_To (Elab_Code, |
6362 | Build_Inherit_Predefined_Prims (Loc, | |
6363 | Old_Tag_Node => | |
6364 | Unchecked_Convert_To (RTE (RE_Tag), | |
83c6c069 | 6365 | New_Occurrence_Of |
acf97c11 | 6366 | (Node |
6367 | (Next_Elmt (Sec_DT_Ancestor)), | |
6368 | Loc)), | |
343d35dc | 6369 | New_Tag_Node => |
6370 | Unchecked_Convert_To (RTE (RE_Tag), | |
83c6c069 | 6371 | New_Occurrence_Of |
acf97c11 | 6372 | (Node (Next_Elmt (Sec_DT_Typ)), |
6373 | Loc)))); | |
343d35dc | 6374 | |
6375 | if Num_Prims /= 0 then | |
6376 | Append_To (Elab_Code, | |
6377 | Build_Inherit_Prims (Loc, | |
17e14451 | 6378 | Typ => Node (Iface), |
343d35dc | 6379 | Old_Tag_Node => |
6380 | Unchecked_Convert_To | |
6381 | (RTE (RE_Tag), | |
83c6c069 | 6382 | New_Occurrence_Of |
343d35dc | 6383 | (Node (Sec_DT_Ancestor), |
6384 | Loc)), | |
6385 | New_Tag_Node => | |
6386 | Unchecked_Convert_To | |
6387 | (RTE (RE_Tag), | |
83c6c069 | 6388 | New_Occurrence_Of |
343d35dc | 6389 | (Node (Sec_DT_Typ), Loc)), |
17e14451 | 6390 | Num_Prims => Num_Prims)); |
343d35dc | 6391 | end if; |
cdb1c38f | 6392 | end if; |
6393 | end; | |
af647dc7 | 6394 | |
6395 | Next_Elmt (Sec_DT_Ancestor); | |
6396 | Next_Elmt (Sec_DT_Typ); | |
acf97c11 | 6397 | |
6398 | -- Skip the secondary dispatch table of | |
6399 | -- predefined primitives | |
6400 | ||
6401 | Next_Elmt (Sec_DT_Ancestor); | |
6402 | Next_Elmt (Sec_DT_Typ); | |
6403 | ||
af647dc7 | 6404 | Next_Elmt (Iface); |
6405 | end if; | |
d62940bf | 6406 | |
af647dc7 | 6407 | Next_Entity (E); |
6408 | end loop; | |
6409 | end if; | |
6410 | end Copy_Secondary_DTs; | |
d62940bf | 6411 | |
af647dc7 | 6412 | begin |
725a69d2 | 6413 | if Present (Node (Sec_DT_Ancestor)) |
6414 | and then Ekind (Node (Sec_DT_Ancestor)) = E_Constant | |
6415 | then | |
af647dc7 | 6416 | -- Handle private types |
76a1c25b | 6417 | |
af647dc7 | 6418 | if Present (Full_View (Typ)) then |
6419 | Copy_Secondary_DTs (Full_View (Typ)); | |
6420 | else | |
6421 | Copy_Secondary_DTs (Typ); | |
6422 | end if; | |
76a1c25b | 6423 | end if; |
af647dc7 | 6424 | end; |
6425 | end if; | |
76a1c25b | 6426 | end if; |
343d35dc | 6427 | end if; |
d62940bf | 6428 | |
15a67a0a | 6429 | -- Generate code to check if the external tag of this type is the same |
6430 | -- as the external tag of some other declaration. | |
354540f3 | 6431 | |
6432 | -- Check_TSD (TSD'Unrestricted_Access); | |
6433 | ||
4a473cb9 | 6434 | -- This check is a consequence of AI05-0113-1/06, so it officially |
6435 | -- applies to Ada 2005 (and Ada 2012). It might be argued that it is | |
6436 | -- a desirable check to add in Ada 95 mode, but we hesitate to make | |
6437 | -- this change, as it would be incompatible, and could conceivably | |
cb0deab3 | 6438 | -- cause a problem in existing Ada 95 code. |
4a473cb9 | 6439 | |
6440 | -- We check for No_Run_Time_Mode here, because we do not want to pick | |
6441 | -- up the RE_Check_TSD entity and call it in No_Run_Time mode. | |
52b9debb | 6442 | |
f76c2b51 | 6443 | -- We cannot perform this check if the generation of its expanded name |
6444 | -- was discarded. | |
6445 | ||
354540f3 | 6446 | if not No_Run_Time_Mode |
cb0deab3 | 6447 | and then not Discard_Names |
4a473cb9 | 6448 | and then Ada_Version >= Ada_2005 |
354540f3 | 6449 | and then RTE_Available (RE_Check_TSD) |
fa771c05 | 6450 | and then not Duplicated_Tag_Checks_Suppressed (Typ) |
354540f3 | 6451 | then |
6452 | Append_To (Elab_Code, | |
6453 | Make_Procedure_Call_Statement (Loc, | |
15a67a0a | 6454 | Name => |
6455 | New_Occurrence_Of (RTE (RE_Check_TSD), Loc), | |
354540f3 | 6456 | Parameter_Associations => New_List ( |
6457 | Make_Attribute_Reference (Loc, | |
15a67a0a | 6458 | Prefix => New_Occurrence_Of (TSD, Loc), |
354540f3 | 6459 | Attribute_Name => Name_Unchecked_Access)))); |
6460 | end if; | |
6461 | ||
343d35dc | 6462 | -- Generate code to register the Tag in the External_Tag hash table for |
6463 | -- the pure Ada type only. | |
d62940bf | 6464 | |
343d35dc | 6465 | -- Register_Tag (Dt_Ptr); |
d62940bf | 6466 | |
725a69d2 | 6467 | -- Skip this action in the following cases: |
6468 | -- 1) if Register_Tag is not available. | |
6469 | -- 2) in No_Run_Time mode. | |
2ea346ac | 6470 | -- 3) if Typ is not defined at the library level (this is required |
725a69d2 | 6471 | -- to avoid adding concurrency control to the hash table used |
6472 | -- by the run-time to register the tags). | |
d62940bf | 6473 | |
cdb1c38f | 6474 | if not No_Run_Time_Mode |
6475 | and then Is_Library_Level_Entity (Typ) | |
6476 | and then RTE_Available (RE_Register_Tag) | |
6477 | then | |
725a69d2 | 6478 | Append_To (Elab_Code, |
cdb1c38f | 6479 | Make_Procedure_Call_Statement (Loc, |
02a2406d | 6480 | Name => |
6481 | New_Occurrence_Of (RTE (RE_Register_Tag), Loc), | |
cdb1c38f | 6482 | Parameter_Associations => |
83c6c069 | 6483 | New_List (New_Occurrence_Of (DT_Ptr, Loc)))); |
d62940bf | 6484 | end if; |
6485 | ||
2ea346ac | 6486 | if not Is_Empty_List (Elab_Code) then |
6487 | Append_List_To (Result, Elab_Code); | |
6488 | end if; | |
cdb1c38f | 6489 | |
f38c8084 | 6490 | -- Populate the two auxiliary tables used for dispatching asynchronous, |
6491 | -- conditional and timed selects for synchronized types that implement | |
6492 | -- a limited interface. Skip this step in Ravenscar profile or when | |
6493 | -- general dispatching is forbidden. | |
17e14451 | 6494 | |
de54c5ab | 6495 | if Ada_Version >= Ada_2005 |
17e14451 | 6496 | and then Is_Concurrent_Record_Type (Typ) |
a652dd51 | 6497 | and then Has_Interfaces (Typ) |
f38c8084 | 6498 | and then not Restriction_Active (No_Dispatching_Calls) |
6499 | and then not Restriction_Active (No_Select_Statements) | |
17e14451 | 6500 | then |
6501 | Append_List_To (Result, | |
6502 | Make_Select_Specific_Data_Table (Typ)); | |
6503 | end if; | |
6504 | ||
cc60bd16 | 6505 | -- Remember entities containing dispatch tables |
acf97c11 | 6506 | |
cc60bd16 | 6507 | Append_Elmt (Predef_Prims, DT_Decl); |
6508 | Append_Elmt (DT, DT_Decl); | |
acf97c11 | 6509 | |
725a69d2 | 6510 | Analyze_List (Result, Suppress => All_Checks); |
17e14451 | 6511 | Set_Has_Dispatch_Table (Typ); |
6512 | ||
f301a57b | 6513 | -- Mark entities containing dispatch tables. Required by the backend to |
6514 | -- handle them properly. | |
cc60bd16 | 6515 | |
925c2ba1 | 6516 | if Has_DT (Typ) then |
cc60bd16 | 6517 | declare |
6518 | Elmt : Elmt_Id; | |
6519 | ||
6520 | begin | |
cc60bd16 | 6521 | -- Object declarations |
6522 | ||
6523 | Elmt := First_Elmt (DT_Decl); | |
6524 | while Present (Elmt) loop | |
6525 | Set_Is_Dispatch_Table_Entity (Node (Elmt)); | |
6526 | pragma Assert (Ekind (Etype (Node (Elmt))) = E_Array_Subtype | |
6527 | or else Ekind (Etype (Node (Elmt))) = E_Record_Subtype); | |
6528 | Set_Is_Dispatch_Table_Entity (Etype (Node (Elmt))); | |
6529 | Next_Elmt (Elmt); | |
6530 | end loop; | |
6531 | ||
6532 | -- Aggregates initializing dispatch tables | |
6533 | ||
6534 | Elmt := First_Elmt (DT_Aggr); | |
6535 | while Present (Elmt) loop | |
6536 | Set_Is_Dispatch_Table_Entity (Etype (Node (Elmt))); | |
6537 | Next_Elmt (Elmt); | |
6538 | end loop; | |
6539 | end; | |
6540 | end if; | |
6541 | ||
72a98436 | 6542 | <<Leave_SCIL>> |
83d39cd3 | 6543 | |
e00e091c | 6544 | -- Register the tagged type in the call graph nodes table |
6545 | ||
6546 | Register_CG_Node (Typ); | |
6547 | ||
72a98436 | 6548 | <<Leave>> |
150bddeb | 6549 | Restore_Ghost_Region (Saved_GM, Saved_IGR); |
72a98436 | 6550 | |
76a1c25b | 6551 | return Result; |
6552 | end Make_DT; | |
d62940bf | 6553 | |
76a1c25b | 6554 | ------------------------------------- |
6555 | -- Make_Select_Specific_Data_Table -- | |
6556 | ------------------------------------- | |
d62940bf | 6557 | |
76a1c25b | 6558 | function Make_Select_Specific_Data_Table |
6559 | (Typ : Entity_Id) return List_Id | |
6560 | is | |
6561 | Assignments : constant List_Id := New_List; | |
6562 | Loc : constant Source_Ptr := Sloc (Typ); | |
d62940bf | 6563 | |
68f95949 | 6564 | Conc_Typ : Entity_Id; |
95c577d7 | 6565 | Decls : List_Id := No_List; |
68f95949 | 6566 | Prim : Entity_Id; |
6567 | Prim_Als : Entity_Id; | |
6568 | Prim_Elmt : Elmt_Id; | |
6569 | Prim_Pos : Uint; | |
343d35dc | 6570 | Nb_Prim : Nat := 0; |
d62940bf | 6571 | |
76a1c25b | 6572 | type Examined_Array is array (Int range <>) of Boolean; |
d62940bf | 6573 | |
76a1c25b | 6574 | function Find_Entry_Index (E : Entity_Id) return Uint; |
6575 | -- Given an entry, find its index in the visible declarations of the | |
6576 | -- corresponding concurrent type of Typ. | |
d62940bf | 6577 | |
76a1c25b | 6578 | ---------------------- |
6579 | -- Find_Entry_Index -- | |
6580 | ---------------------- | |
d62940bf | 6581 | |
76a1c25b | 6582 | function Find_Entry_Index (E : Entity_Id) return Uint is |
6583 | Index : Uint := Uint_1; | |
6584 | Subp_Decl : Entity_Id; | |
d62940bf | 6585 | |
76a1c25b | 6586 | begin |
6587 | if Present (Decls) | |
6588 | and then not Is_Empty_List (Decls) | |
6589 | then | |
6590 | Subp_Decl := First (Decls); | |
6591 | while Present (Subp_Decl) loop | |
6592 | if Nkind (Subp_Decl) = N_Entry_Declaration then | |
6593 | if Defining_Identifier (Subp_Decl) = E then | |
6594 | return Index; | |
6595 | end if; | |
d62940bf | 6596 | |
76a1c25b | 6597 | Index := Index + 1; |
6598 | end if; | |
d62940bf | 6599 | |
76a1c25b | 6600 | Next (Subp_Decl); |
6601 | end loop; | |
6602 | end if; | |
d62940bf | 6603 | |
76a1c25b | 6604 | return Uint_0; |
6605 | end Find_Entry_Index; | |
6606 | ||
bf7f5966 | 6607 | -- Local variables |
6608 | ||
6609 | Tag_Node : Node_Id; | |
6610 | ||
76a1c25b | 6611 | -- Start of processing for Make_Select_Specific_Data_Table |
6612 | ||
6613 | begin | |
68f95949 | 6614 | pragma Assert (not Restriction_Active (No_Dispatching_Calls)); |
6615 | ||
76a1c25b | 6616 | if Present (Corresponding_Concurrent_Type (Typ)) then |
6617 | Conc_Typ := Corresponding_Concurrent_Type (Typ); | |
6618 | ||
17e14451 | 6619 | if Present (Full_View (Conc_Typ)) then |
6620 | Conc_Typ := Full_View (Conc_Typ); | |
6621 | end if; | |
6622 | ||
76a1c25b | 6623 | if Ekind (Conc_Typ) = E_Protected_Type then |
6624 | Decls := Visible_Declarations (Protected_Definition ( | |
6625 | Parent (Conc_Typ))); | |
d62940bf | 6626 | else |
6627 | pragma Assert (Ekind (Conc_Typ) = E_Task_Type); | |
76a1c25b | 6628 | Decls := Visible_Declarations (Task_Definition ( |
6629 | Parent (Conc_Typ))); | |
6630 | end if; | |
6631 | end if; | |
d62940bf | 6632 | |
76a1c25b | 6633 | -- Count the non-predefined primitive operations |
d62940bf | 6634 | |
76a1c25b | 6635 | Prim_Elmt := First_Elmt (Primitive_Operations (Typ)); |
6636 | while Present (Prim_Elmt) loop | |
af647dc7 | 6637 | Prim := Node (Prim_Elmt); |
6638 | ||
6639 | if not (Is_Predefined_Dispatching_Operation (Prim) | |
6640 | or else Is_Predefined_Dispatching_Alias (Prim)) | |
6641 | then | |
76a1c25b | 6642 | Nb_Prim := Nb_Prim + 1; |
6643 | end if; | |
d62940bf | 6644 | |
76a1c25b | 6645 | Next_Elmt (Prim_Elmt); |
6646 | end loop; | |
d62940bf | 6647 | |
76a1c25b | 6648 | declare |
68f95949 | 6649 | Examined : Examined_Array (1 .. Nb_Prim) := (others => False); |
d62940bf | 6650 | |
76a1c25b | 6651 | begin |
6652 | Prim_Elmt := First_Elmt (Primitive_Operations (Typ)); | |
6653 | while Present (Prim_Elmt) loop | |
6654 | Prim := Node (Prim_Elmt); | |
d62940bf | 6655 | |
af647dc7 | 6656 | -- Look for primitive overriding an abstract interface subprogram |
d62940bf | 6657 | |
a652dd51 | 6658 | if Present (Interface_Alias (Prim)) |
c8da6114 | 6659 | and then not |
6660 | Is_Ancestor | |
cb4af01d | 6661 | (Find_Dispatching_Type (Interface_Alias (Prim)), Typ, |
6662 | Use_Full_View => True) | |
af647dc7 | 6663 | and then not Examined (UI_To_Int (DT_Position (Alias (Prim)))) |
6664 | then | |
6665 | Prim_Pos := DT_Position (Alias (Prim)); | |
6666 | pragma Assert (UI_To_Int (Prim_Pos) <= Nb_Prim); | |
6667 | Examined (UI_To_Int (Prim_Pos)) := True; | |
d62940bf | 6668 | |
af647dc7 | 6669 | -- Set the primitive operation kind regardless of subprogram |
6670 | -- type. Generate: | |
6671 | -- Ada.Tags.Set_Prim_Op_Kind (DT_Ptr, <position>, <kind>); | |
d62940bf | 6672 | |
bf7f5966 | 6673 | if Tagged_Type_Expansion then |
6674 | Tag_Node := | |
83c6c069 | 6675 | New_Occurrence_Of |
bf7f5966 | 6676 | (Node (First_Elmt (Access_Disp_Table (Typ))), Loc); |
6677 | ||
6678 | else | |
6679 | Tag_Node := | |
6680 | Make_Attribute_Reference (Loc, | |
83c6c069 | 6681 | Prefix => New_Occurrence_Of (Typ, Loc), |
bf7f5966 | 6682 | Attribute_Name => Name_Tag); |
6683 | end if; | |
6684 | ||
af647dc7 | 6685 | Append_To (Assignments, |
725a69d2 | 6686 | Make_Procedure_Call_Statement (Loc, |
83c6c069 | 6687 | Name => New_Occurrence_Of (RTE (RE_Set_Prim_Op_Kind), Loc), |
725a69d2 | 6688 | Parameter_Associations => New_List ( |
bf7f5966 | 6689 | Tag_Node, |
725a69d2 | 6690 | Make_Integer_Literal (Loc, Prim_Pos), |
6691 | Prim_Op_Kind (Alias (Prim), Typ)))); | |
68f95949 | 6692 | |
af647dc7 | 6693 | -- Retrieve the root of the alias chain |
68f95949 | 6694 | |
fc2907f6 | 6695 | Prim_Als := Ultimate_Alias (Prim); |
68f95949 | 6696 | |
af647dc7 | 6697 | -- In the case of an entry wrapper, set the entry index |
68f95949 | 6698 | |
af647dc7 | 6699 | if Ekind (Prim) = E_Procedure |
6700 | and then Is_Primitive_Wrapper (Prim_Als) | |
6701 | and then Ekind (Wrapped_Entity (Prim_Als)) = E_Entry | |
6702 | then | |
6703 | -- Generate: | |
6704 | -- Ada.Tags.Set_Entry_Index | |
6705 | -- (DT_Ptr, <position>, <index>); | |
68f95949 | 6706 | |
bf7f5966 | 6707 | if Tagged_Type_Expansion then |
6708 | Tag_Node := | |
83c6c069 | 6709 | New_Occurrence_Of |
96dc081d | 6710 | (Node (First_Elmt (Access_Disp_Table (Typ))), Loc); |
bf7f5966 | 6711 | else |
6712 | Tag_Node := | |
6713 | Make_Attribute_Reference (Loc, | |
83c6c069 | 6714 | Prefix => New_Occurrence_Of (Typ, Loc), |
bf7f5966 | 6715 | Attribute_Name => Name_Tag); |
6716 | end if; | |
6717 | ||
af647dc7 | 6718 | Append_To (Assignments, |
725a69d2 | 6719 | Make_Procedure_Call_Statement (Loc, |
6720 | Name => | |
83c6c069 | 6721 | New_Occurrence_Of (RTE (RE_Set_Entry_Index), Loc), |
725a69d2 | 6722 | Parameter_Associations => New_List ( |
bf7f5966 | 6723 | Tag_Node, |
725a69d2 | 6724 | Make_Integer_Literal (Loc, Prim_Pos), |
6725 | Make_Integer_Literal (Loc, | |
6726 | Find_Entry_Index (Wrapped_Entity (Prim_Als)))))); | |
76a1c25b | 6727 | end if; |
6728 | end if; | |
6729 | ||
76a1c25b | 6730 | Next_Elmt (Prim_Elmt); |
6731 | end loop; | |
6732 | end; | |
6733 | ||
6734 | return Assignments; | |
6735 | end Make_Select_Specific_Data_Table; | |
d62940bf | 6736 | |
17e14451 | 6737 | --------------- |
6738 | -- Make_Tags -- | |
6739 | --------------- | |
6740 | ||
6741 | function Make_Tags (Typ : Entity_Id) return List_Id is | |
f301a57b | 6742 | Loc : constant Source_Ptr := Sloc (Typ); |
6743 | Result : constant List_Id := New_List; | |
6744 | ||
6745 | procedure Import_DT | |
6746 | (Tag_Typ : Entity_Id; | |
6747 | DT : Entity_Id; | |
6748 | Is_Secondary_DT : Boolean); | |
6749 | -- Import the dispatch table DT of tagged type Tag_Typ. Required to | |
6750 | -- generate forward references and statically allocate the table. For | |
6751 | -- primary dispatch tables that require no dispatch table generate: | |
d03ada96 | 6752 | |
f301a57b | 6753 | -- DT : static aliased constant Non_Dispatch_Table_Wrapper; |
d03ada96 | 6754 | -- pragma Import (Ada, DT); |
6755 | ||
f301a57b | 6756 | -- Otherwise generate: |
d03ada96 | 6757 | |
f301a57b | 6758 | -- DT : static aliased constant Dispatch_Table_Wrapper (Nb_Prim); |
d03ada96 | 6759 | -- pragma Import (Ada, DT); |
7854e190 | 6760 | |
f301a57b | 6761 | --------------- |
6762 | -- Import_DT -- | |
6763 | --------------- | |
24971415 | 6764 | |
f301a57b | 6765 | procedure Import_DT |
6766 | (Tag_Typ : Entity_Id; | |
6767 | DT : Entity_Id; | |
6768 | Is_Secondary_DT : Boolean) | |
6769 | is | |
6770 | DT_Constr_List : List_Id; | |
6771 | Nb_Prim : Nat; | |
24971415 | 6772 | |
f301a57b | 6773 | begin |
6774 | Set_Is_Imported (DT); | |
6775 | Set_Ekind (DT, E_Constant); | |
6776 | Set_Related_Type (DT, Typ); | |
24971415 | 6777 | |
24971415 | 6778 | -- The scope must be set now to call Get_External_Name |
6779 | ||
6780 | Set_Scope (DT, Current_Scope); | |
6781 | ||
f92da234 | 6782 | Get_External_Name (DT); |
24971415 | 6783 | Set_Interface_Name (DT, |
d03ada96 | 6784 | Make_String_Literal (Loc, Strval => String_From_Name_Buffer)); |
17e14451 | 6785 | |
24971415 | 6786 | -- Ensure proper Sprint output of this implicit importation |
17e14451 | 6787 | |
24971415 | 6788 | Set_Is_Internal (DT); |
17e14451 | 6789 | |
24971415 | 6790 | -- Save this entity to allow Make_DT to generate its exportation |
6791 | ||
f301a57b | 6792 | Append_Elmt (DT, Dispatch_Table_Wrappers (Typ)); |
24971415 | 6793 | |
f301a57b | 6794 | -- No dispatch table required |
acf97c11 | 6795 | |
d03ada96 | 6796 | if not Is_Secondary_DT and then not Has_DT (Tag_Typ) then |
f301a57b | 6797 | Append_To (Result, |
6798 | Make_Object_Declaration (Loc, | |
6799 | Defining_Identifier => DT, | |
6800 | Aliased_Present => True, | |
6801 | Constant_Present => True, | |
6802 | Object_Definition => | |
83c6c069 | 6803 | New_Occurrence_Of |
6804 | (RTE (RE_No_Dispatch_Table_Wrapper), Loc))); | |
f301a57b | 6805 | |
6806 | else | |
24971415 | 6807 | -- Calculate the number of primitives of the dispatch table and |
6808 | -- the size of the Type_Specific_Data record. | |
6809 | ||
f301a57b | 6810 | Nb_Prim := |
6811 | UI_To_Int (DT_Entry_Count (First_Tag_Component (Tag_Typ))); | |
24971415 | 6812 | |
d03ada96 | 6813 | -- If the tagged type has no primitives we add a dummy slot whose |
6814 | -- address will be the tag of this type. | |
24971415 | 6815 | |
6816 | if Nb_Prim = 0 then | |
6817 | DT_Constr_List := | |
6818 | New_List (Make_Integer_Literal (Loc, 1)); | |
6819 | else | |
6820 | DT_Constr_List := | |
6821 | New_List (Make_Integer_Literal (Loc, Nb_Prim)); | |
6822 | end if; | |
6823 | ||
6824 | Append_To (Result, | |
6825 | Make_Object_Declaration (Loc, | |
6826 | Defining_Identifier => DT, | |
6827 | Aliased_Present => True, | |
6828 | Constant_Present => True, | |
6829 | Object_Definition => | |
6830 | Make_Subtype_Indication (Loc, | |
6831 | Subtype_Mark => | |
83c6c069 | 6832 | New_Occurrence_Of (RTE (RE_Dispatch_Table_Wrapper), Loc), |
24971415 | 6833 | Constraint => Make_Index_Or_Discriminant_Constraint (Loc, |
6834 | Constraints => DT_Constr_List)))); | |
f301a57b | 6835 | end if; |
6836 | end Import_DT; | |
6837 | ||
6838 | -- Local variables | |
6839 | ||
6840 | Tname : constant Name_Id := Chars (Typ); | |
6841 | AI_Tag_Comp : Elmt_Id; | |
7640ed3d | 6842 | DT : Node_Id := Empty; |
f301a57b | 6843 | DT_Ptr : Node_Id; |
6844 | Predef_Prims_Ptr : Node_Id; | |
d04be62f | 6845 | Iface_DT : Node_Id := Empty; |
f301a57b | 6846 | Iface_DT_Ptr : Node_Id; |
d215f619 | 6847 | New_Node : Node_Id; |
f301a57b | 6848 | Suffix_Index : Int; |
6849 | Typ_Name : Name_Id; | |
6850 | Typ_Comps : Elist_Id; | |
6851 | ||
6852 | -- Start of processing for Make_Tags | |
6853 | ||
6854 | begin | |
d00681a7 | 6855 | pragma Assert (No (Access_Disp_Table (Typ))); |
6856 | Set_Access_Disp_Table (Typ, New_Elmt_List); | |
f301a57b | 6857 | |
1f0c90bb | 6858 | -- If the elaboration of this tagged type needs a boolean flag then |
6859 | -- define now its entity. It is initialized to True to indicate that | |
6860 | -- elaboration is still pending; set to False by the IP routine. | |
6861 | ||
6862 | -- TypFxx : boolean := True; | |
6863 | ||
6864 | if Elab_Flag_Needed (Typ) then | |
6865 | Set_Access_Disp_Table_Elab_Flag (Typ, | |
6866 | Make_Defining_Identifier (Loc, | |
edfb7dbc | 6867 | Chars => New_External_Name (Tname, 'F'))); |
1f0c90bb | 6868 | |
6869 | Append_To (Result, | |
6870 | Make_Object_Declaration (Loc, | |
6871 | Defining_Identifier => Access_Disp_Table_Elab_Flag (Typ), | |
6872 | Object_Definition => New_Occurrence_Of (Standard_Boolean, Loc), | |
6873 | Expression => New_Occurrence_Of (Standard_True, Loc))); | |
6874 | end if; | |
6875 | ||
f301a57b | 6876 | -- 1) Generate the primary tag entities |
6877 | ||
6878 | -- Primary dispatch table containing user-defined primitives | |
6879 | ||
d00681a7 | 6880 | DT_Ptr := Make_Defining_Identifier (Loc, New_External_Name (Tname, 'P')); |
6881 | Set_Etype (DT_Ptr, RTE (RE_Tag)); | |
6882 | Append_Elmt (DT_Ptr, Access_Disp_Table (Typ)); | |
f301a57b | 6883 | |
d00681a7 | 6884 | -- Minimum decoration |
f301a57b | 6885 | |
d00681a7 | 6886 | Set_Ekind (DT_Ptr, E_Variable); |
6887 | Set_Related_Type (DT_Ptr, Typ); | |
f301a57b | 6888 | |
02a2406d | 6889 | -- Notify back end that the types are associated with a dispatch table |
2ff0322d | 6890 | |
6891 | Set_Is_Dispatch_Table_Entity (RTE (RE_Prim_Ptr)); | |
6892 | Set_Is_Dispatch_Table_Entity (RTE (RE_Predef_Prims_Table_Ptr)); | |
6893 | ||
d00681a7 | 6894 | -- For CPP types there is no need to build the dispatch tables since |
5682f43c | 6895 | -- they are imported from the C++ side. If the CPP type has an IP then |
6896 | -- we declare now the variable that will store the copy of the C++ tag. | |
d03ada96 | 6897 | -- If the CPP type is an interface, we need the variable as well because |
6898 | -- it becomes the pointer to the corresponding secondary table. | |
f301a57b | 6899 | |
d00681a7 | 6900 | if Is_CPP_Class (Typ) then |
5682f43c | 6901 | if Has_CPP_Constructors (Typ) or else Is_Interface (Typ) then |
24971415 | 6902 | Append_To (Result, |
6903 | Make_Object_Declaration (Loc, | |
6904 | Defining_Identifier => DT_Ptr, | |
83c6c069 | 6905 | Object_Definition => New_Occurrence_Of (RTE (RE_Tag), Loc), |
24971415 | 6906 | Expression => |
6907 | Unchecked_Convert_To (RTE (RE_Tag), | |
83c6c069 | 6908 | New_Occurrence_Of (RTE (RE_Null_Address), Loc)))); |
24971415 | 6909 | |
d00681a7 | 6910 | Set_Is_Statically_Allocated (DT_Ptr, |
6911 | Is_Library_Level_Tagged_Type (Typ)); | |
6912 | end if; | |
9af28f61 | 6913 | |
d00681a7 | 6914 | -- Ada types |
3dbca0d5 | 6915 | |
d00681a7 | 6916 | else |
6917 | -- Primary dispatch table containing predefined primitives | |
acf97c11 | 6918 | |
d00681a7 | 6919 | Predef_Prims_Ptr := |
6920 | Make_Defining_Identifier (Loc, | |
6921 | Chars => New_External_Name (Tname, 'Y')); | |
6922 | Set_Etype (Predef_Prims_Ptr, RTE (RE_Address)); | |
6923 | Append_Elmt (Predef_Prims_Ptr, Access_Disp_Table (Typ)); | |
24971415 | 6924 | |
d00681a7 | 6925 | -- Import the forward declaration of the Dispatch Table wrapper |
d03ada96 | 6926 | -- record (Make_DT will take care of exporting it). |
24971415 | 6927 | |
d00681a7 | 6928 | if Building_Static_DT (Typ) then |
6929 | Set_Dispatch_Table_Wrappers (Typ, New_Elmt_List); | |
17e14451 | 6930 | |
d00681a7 | 6931 | DT := |
6932 | Make_Defining_Identifier (Loc, | |
6933 | Chars => New_External_Name (Tname, 'T')); | |
6934 | ||
6935 | Import_DT (Typ, DT, Is_Secondary_DT => False); | |
6936 | ||
6937 | if Has_DT (Typ) then | |
6938 | Append_To (Result, | |
6939 | Make_Object_Declaration (Loc, | |
6940 | Defining_Identifier => DT_Ptr, | |
6941 | Constant_Present => True, | |
83c6c069 | 6942 | Object_Definition => |
6943 | New_Occurrence_Of (RTE (RE_Tag), Loc), | |
4055a532 | 6944 | Expression => |
d00681a7 | 6945 | Unchecked_Convert_To (RTE (RE_Tag), |
6946 | Make_Attribute_Reference (Loc, | |
4055a532 | 6947 | Prefix => |
d00681a7 | 6948 | Make_Selected_Component (Loc, |
83c6c069 | 6949 | Prefix => New_Occurrence_Of (DT, Loc), |
4055a532 | 6950 | Selector_Name => |
6951 | New_Occurrence_Of | |
6952 | (RTE_Record_Component (RE_Prims_Ptr), Loc)), | |
d00681a7 | 6953 | Attribute_Name => Name_Address)))); |
6954 | ||
6955 | -- Generate the SCIL node for the previous object declaration | |
6956 | -- because it has a tag initialization. | |
6957 | ||
6958 | if Generate_SCIL then | |
6959 | New_Node := | |
6960 | Make_SCIL_Dispatch_Table_Tag_Init (Sloc (Last (Result))); | |
6961 | Set_SCIL_Entity (New_Node, Typ); | |
6962 | Set_SCIL_Node (Last (Result), New_Node); | |
6963 | end if; | |
6964 | ||
6965 | Append_To (Result, | |
6966 | Make_Object_Declaration (Loc, | |
6967 | Defining_Identifier => Predef_Prims_Ptr, | |
6968 | Constant_Present => True, | |
4055a532 | 6969 | Object_Definition => |
83c6c069 | 6970 | New_Occurrence_Of (RTE (RE_Address), Loc), |
4055a532 | 6971 | Expression => |
d00681a7 | 6972 | Make_Attribute_Reference (Loc, |
4055a532 | 6973 | Prefix => |
d00681a7 | 6974 | Make_Selected_Component (Loc, |
83c6c069 | 6975 | Prefix => New_Occurrence_Of (DT, Loc), |
4055a532 | 6976 | Selector_Name => |
6977 | New_Occurrence_Of | |
6978 | (RTE_Record_Component (RE_Predef_Prims), Loc)), | |
d00681a7 | 6979 | Attribute_Name => Name_Address))); |
6980 | ||
6981 | -- No dispatch table required | |
6982 | ||
6983 | else | |
6984 | Append_To (Result, | |
6985 | Make_Object_Declaration (Loc, | |
6986 | Defining_Identifier => DT_Ptr, | |
6987 | Constant_Present => True, | |
83c6c069 | 6988 | Object_Definition => |
6989 | New_Occurrence_Of (RTE (RE_Tag), Loc), | |
4055a532 | 6990 | Expression => |
d00681a7 | 6991 | Unchecked_Convert_To (RTE (RE_Tag), |
6992 | Make_Attribute_Reference (Loc, | |
4055a532 | 6993 | Prefix => |
d00681a7 | 6994 | Make_Selected_Component (Loc, |
83c6c069 | 6995 | Prefix => New_Occurrence_Of (DT, Loc), |
4055a532 | 6996 | Selector_Name => |
6997 | New_Occurrence_Of | |
6998 | (RTE_Record_Component (RE_NDT_Prims_Ptr), | |
6999 | Loc)), | |
d00681a7 | 7000 | Attribute_Name => Name_Address)))); |
7001 | end if; | |
7002 | ||
7003 | Set_Is_True_Constant (DT_Ptr); | |
7004 | Set_Is_Statically_Allocated (DT_Ptr); | |
7005 | end if; | |
7006 | end if; | |
17e14451 | 7007 | |
7008 | -- 2) Generate the secondary tag entities | |
7009 | ||
d00681a7 | 7010 | -- Collect the components associated with secondary dispatch tables |
7011 | ||
a652dd51 | 7012 | if Has_Interfaces (Typ) then |
d00681a7 | 7013 | Collect_Interface_Components (Typ, Typ_Comps); |
f301a57b | 7014 | |
d03ada96 | 7015 | -- For each interface type we build a unique external name associated |
7016 | -- with its secondary dispatch table. This name is used to declare an | |
7017 | -- object that references this secondary dispatch table, whose value | |
7018 | -- will be used for the elaboration of Typ objects, and also for the | |
7019 | -- elaboration of objects of types derived from Typ that do not | |
7020 | -- override the primitives of this interface type. | |
f301a57b | 7021 | |
7022 | Suffix_Index := 1; | |
17e14451 | 7023 | |
02a2406d | 7024 | -- Note: The value of Suffix_Index must be in sync with the values of |
7025 | -- Suffix_Index in secondary dispatch tables generated by Make_DT. | |
17e14451 | 7026 | |
d00681a7 | 7027 | if Is_CPP_Class (Typ) then |
7028 | AI_Tag_Comp := First_Elmt (Typ_Comps); | |
7029 | while Present (AI_Tag_Comp) loop | |
7030 | Get_Secondary_DT_External_Name | |
7031 | (Typ, Related_Type (Node (AI_Tag_Comp)), Suffix_Index); | |
7032 | Typ_Name := Name_Find; | |
17e14451 | 7033 | |
02a2406d | 7034 | -- Declare variables to store copy of the C++ secondary tags |
f301a57b | 7035 | |
d00681a7 | 7036 | Iface_DT_Ptr := |
7037 | Make_Defining_Identifier (Loc, | |
7038 | Chars => New_External_Name (Typ_Name, 'P')); | |
7039 | Set_Etype (Iface_DT_Ptr, RTE (RE_Interface_Tag)); | |
7040 | Set_Ekind (Iface_DT_Ptr, E_Variable); | |
7041 | Set_Is_Tag (Iface_DT_Ptr); | |
acf97c11 | 7042 | |
d00681a7 | 7043 | Set_Has_Thunks (Iface_DT_Ptr); |
7044 | Set_Related_Type | |
7045 | (Iface_DT_Ptr, Related_Type (Node (AI_Tag_Comp))); | |
7046 | Append_Elmt (Iface_DT_Ptr, Access_Disp_Table (Typ)); | |
cdb1c38f | 7047 | |
f301a57b | 7048 | Append_To (Result, |
7049 | Make_Object_Declaration (Loc, | |
7050 | Defining_Identifier => Iface_DT_Ptr, | |
83c6c069 | 7051 | Object_Definition => New_Occurrence_Of |
f301a57b | 7052 | (RTE (RE_Interface_Tag), Loc), |
7053 | Expression => | |
7054 | Unchecked_Convert_To (RTE (RE_Interface_Tag), | |
83c6c069 | 7055 | New_Occurrence_Of (RTE (RE_Null_Address), Loc)))); |
f301a57b | 7056 | |
d00681a7 | 7057 | Set_Is_Statically_Allocated (Iface_DT_Ptr, |
7058 | Is_Library_Level_Tagged_Type (Typ)); | |
acf97c11 | 7059 | |
d00681a7 | 7060 | Next_Elmt (AI_Tag_Comp); |
7061 | end loop; | |
acf97c11 | 7062 | |
d00681a7 | 7063 | -- This is not a CPP_Class type |
acf97c11 | 7064 | |
d00681a7 | 7065 | else |
7066 | AI_Tag_Comp := First_Elmt (Typ_Comps); | |
7067 | while Present (AI_Tag_Comp) loop | |
7068 | Get_Secondary_DT_External_Name | |
7069 | (Typ, Related_Type (Node (AI_Tag_Comp)), Suffix_Index); | |
7070 | Typ_Name := Name_Find; | |
17e14451 | 7071 | |
d00681a7 | 7072 | if Building_Static_DT (Typ) then |
7073 | Iface_DT := | |
7074 | Make_Defining_Identifier (Loc, | |
2c011bc5 | 7075 | Chars => New_External_Name (Typ_Name, 'T')); |
d00681a7 | 7076 | Import_DT |
7077 | (Tag_Typ => Related_Type (Node (AI_Tag_Comp)), | |
7078 | DT => Iface_DT, | |
7079 | Is_Secondary_DT => True); | |
7080 | end if; | |
acf97c11 | 7081 | |
d00681a7 | 7082 | -- Secondary dispatch table referencing thunks to user-defined |
7083 | -- primitives covered by this interface. | |
acf97c11 | 7084 | |
d00681a7 | 7085 | Iface_DT_Ptr := |
7086 | Make_Defining_Identifier (Loc, | |
7087 | Chars => New_External_Name (Typ_Name, 'P')); | |
7088 | Set_Etype (Iface_DT_Ptr, RTE (RE_Interface_Tag)); | |
7089 | Set_Ekind (Iface_DT_Ptr, E_Constant); | |
7090 | Set_Is_Tag (Iface_DT_Ptr); | |
7091 | Set_Has_Thunks (Iface_DT_Ptr); | |
7092 | Set_Is_Statically_Allocated (Iface_DT_Ptr, | |
7093 | Is_Library_Level_Tagged_Type (Typ)); | |
7094 | Set_Is_True_Constant (Iface_DT_Ptr); | |
7095 | Set_Related_Type | |
7096 | (Iface_DT_Ptr, Related_Type (Node (AI_Tag_Comp))); | |
7097 | Append_Elmt (Iface_DT_Ptr, Access_Disp_Table (Typ)); | |
7098 | ||
7099 | if Building_Static_DT (Typ) then | |
7100 | Append_To (Result, | |
7101 | Make_Object_Declaration (Loc, | |
7102 | Defining_Identifier => Iface_DT_Ptr, | |
7103 | Constant_Present => True, | |
83c6c069 | 7104 | Object_Definition => New_Occurrence_Of |
d00681a7 | 7105 | (RTE (RE_Interface_Tag), Loc), |
4055a532 | 7106 | Expression => |
d00681a7 | 7107 | Unchecked_Convert_To (RTE (RE_Interface_Tag), |
7108 | Make_Attribute_Reference (Loc, | |
4055a532 | 7109 | Prefix => |
d00681a7 | 7110 | Make_Selected_Component (Loc, |
4055a532 | 7111 | Prefix => |
83c6c069 | 7112 | New_Occurrence_Of (Iface_DT, Loc), |
4055a532 | 7113 | Selector_Name => |
7114 | New_Occurrence_Of | |
7115 | (RTE_Record_Component (RE_Prims_Ptr), | |
7116 | Loc)), | |
d00681a7 | 7117 | Attribute_Name => Name_Address)))); |
7118 | end if; | |
7119 | ||
7120 | -- Secondary dispatch table referencing thunks to predefined | |
7121 | -- primitives. | |
7122 | ||
7123 | Iface_DT_Ptr := | |
7124 | Make_Defining_Identifier (Loc, | |
7125 | Chars => New_External_Name (Typ_Name, 'Y')); | |
7126 | Set_Etype (Iface_DT_Ptr, RTE (RE_Address)); | |
7127 | Set_Ekind (Iface_DT_Ptr, E_Constant); | |
7128 | Set_Is_Tag (Iface_DT_Ptr); | |
7129 | Set_Has_Thunks (Iface_DT_Ptr); | |
7130 | Set_Is_Statically_Allocated (Iface_DT_Ptr, | |
7131 | Is_Library_Level_Tagged_Type (Typ)); | |
7132 | Set_Is_True_Constant (Iface_DT_Ptr); | |
7133 | Set_Related_Type | |
7134 | (Iface_DT_Ptr, Related_Type (Node (AI_Tag_Comp))); | |
7135 | Append_Elmt (Iface_DT_Ptr, Access_Disp_Table (Typ)); | |
7136 | ||
7137 | -- Secondary dispatch table referencing user-defined primitives | |
7138 | -- covered by this interface. | |
7139 | ||
7140 | Iface_DT_Ptr := | |
7141 | Make_Defining_Identifier (Loc, | |
7142 | Chars => New_External_Name (Typ_Name, 'D')); | |
7143 | Set_Etype (Iface_DT_Ptr, RTE (RE_Interface_Tag)); | |
7144 | Set_Ekind (Iface_DT_Ptr, E_Constant); | |
7145 | Set_Is_Tag (Iface_DT_Ptr); | |
7146 | Set_Is_Statically_Allocated (Iface_DT_Ptr, | |
7147 | Is_Library_Level_Tagged_Type (Typ)); | |
7148 | Set_Is_True_Constant (Iface_DT_Ptr); | |
7149 | Set_Related_Type | |
7150 | (Iface_DT_Ptr, Related_Type (Node (AI_Tag_Comp))); | |
7151 | Append_Elmt (Iface_DT_Ptr, Access_Disp_Table (Typ)); | |
7152 | ||
7153 | -- Secondary dispatch table referencing predefined primitives | |
7154 | ||
7155 | Iface_DT_Ptr := | |
7156 | Make_Defining_Identifier (Loc, | |
7157 | Chars => New_External_Name (Typ_Name, 'Z')); | |
7158 | Set_Etype (Iface_DT_Ptr, RTE (RE_Address)); | |
7159 | Set_Ekind (Iface_DT_Ptr, E_Constant); | |
7160 | Set_Is_Tag (Iface_DT_Ptr); | |
7161 | Set_Is_Statically_Allocated (Iface_DT_Ptr, | |
7162 | Is_Library_Level_Tagged_Type (Typ)); | |
7163 | Set_Is_True_Constant (Iface_DT_Ptr); | |
7164 | Set_Related_Type | |
7165 | (Iface_DT_Ptr, Related_Type (Node (AI_Tag_Comp))); | |
7166 | Append_Elmt (Iface_DT_Ptr, Access_Disp_Table (Typ)); | |
7167 | ||
7168 | Next_Elmt (AI_Tag_Comp); | |
7169 | end loop; | |
7170 | end if; | |
17e14451 | 7171 | end if; |
7172 | ||
dffd0a90 | 7173 | -- 3) At the end of Access_Disp_Table, if the type has user-defined |
7174 | -- primitives, we add the entity of an access type declaration that | |
7175 | -- is used by Build_Get_Prim_Op_Address to expand dispatching calls | |
7176 | -- through the primary dispatch table. | |
7177 | ||
7178 | if UI_To_Int (DT_Entry_Count (First_Tag_Component (Typ))) = 0 then | |
7179 | Analyze_List (Result); | |
17e14451 | 7180 | |
7181 | -- Generate: | |
1d97d249 | 7182 | -- subtype Typ_DT is Address_Array (1 .. Nb_Prims); |
17e14451 | 7183 | -- type Typ_DT_Acc is access Typ_DT; |
7184 | ||
dffd0a90 | 7185 | else |
7186 | declare | |
7187 | Name_DT_Prims : constant Name_Id := | |
7188 | New_External_Name (Tname, 'G'); | |
7189 | Name_DT_Prims_Acc : constant Name_Id := | |
7190 | New_External_Name (Tname, 'H'); | |
7191 | DT_Prims : constant Entity_Id := | |
7192 | Make_Defining_Identifier (Loc, | |
7193 | Name_DT_Prims); | |
7194 | DT_Prims_Acc : constant Entity_Id := | |
7195 | Make_Defining_Identifier (Loc, | |
7196 | Name_DT_Prims_Acc); | |
7197 | begin | |
7198 | Append_To (Result, | |
1d97d249 | 7199 | Make_Subtype_Declaration (Loc, |
dffd0a90 | 7200 | Defining_Identifier => DT_Prims, |
1d97d249 | 7201 | Subtype_Indication => |
7202 | Make_Subtype_Indication (Loc, | |
7203 | Subtype_Mark => | |
7204 | New_Occurrence_Of (RTE (RE_Address_Array), Loc), | |
7205 | Constraint => | |
7206 | Make_Index_Or_Discriminant_Constraint (Loc, New_List ( | |
7207 | Make_Range (Loc, | |
7208 | Low_Bound => Make_Integer_Literal (Loc, 1), | |
7209 | High_Bound => Make_Integer_Literal (Loc, | |
7210 | DT_Entry_Count | |
7211 | (First_Tag_Component (Typ))))))))); | |
17e14451 | 7212 | |
dffd0a90 | 7213 | Append_To (Result, |
7214 | Make_Full_Type_Declaration (Loc, | |
7215 | Defining_Identifier => DT_Prims_Acc, | |
7216 | Type_Definition => | |
7217 | Make_Access_To_Object_Definition (Loc, | |
7218 | Subtype_Indication => | |
7219 | New_Occurrence_Of (DT_Prims, Loc)))); | |
17e14451 | 7220 | |
dffd0a90 | 7221 | Append_Elmt (DT_Prims_Acc, Access_Disp_Table (Typ)); |
17e14451 | 7222 | |
dffd0a90 | 7223 | -- Analyze the resulting list and suppress the generation of the |
7224 | -- Init_Proc associated with the above array declaration because | |
7225 | -- this type is never used in object declarations. It is only used | |
7226 | -- to simplify the expansion associated with dispatching calls. | |
17e14451 | 7227 | |
dffd0a90 | 7228 | Analyze_List (Result); |
649455a4 | 7229 | Set_Suppress_Initialization (Base_Type (DT_Prims)); |
cc60bd16 | 7230 | |
ff6293ec | 7231 | -- Disable backend optimizations based on assumptions about the |
7232 | -- aliasing status of objects designated by the access to the | |
7233 | -- dispatch table. Required to handle dispatch tables imported | |
7234 | -- from C++. | |
7235 | ||
7236 | Set_No_Strict_Aliasing (Base_Type (DT_Prims_Acc)); | |
7237 | ||
d00681a7 | 7238 | -- Add the freezing nodes of these declarations; required to avoid |
7239 | -- generating these freezing nodes in wrong scopes (for example in | |
7240 | -- the IC routine of a derivation of Typ). | |
02a2406d | 7241 | |
d03ada96 | 7242 | -- What is an "IC routine"? Is "init_proc" meant here??? |
d00681a7 | 7243 | |
d74fc39a | 7244 | Append_List_To (Result, Freeze_Entity (DT_Prims, Typ)); |
7245 | Append_List_To (Result, Freeze_Entity (DT_Prims_Acc, Typ)); | |
d00681a7 | 7246 | |
dffd0a90 | 7247 | -- Mark entity of dispatch table. Required by the back end to |
7248 | -- handle them properly. | |
cc60bd16 | 7249 | |
dffd0a90 | 7250 | Set_Is_Dispatch_Table_Entity (DT_Prims); |
7251 | end; | |
7252 | end if; | |
17e14451 | 7253 | |
11bd2f46 | 7254 | -- Mark entities of dispatch table. Required by the back end to handle |
7255 | -- them properly. | |
7640ed3d | 7256 | |
7257 | if Present (DT) then | |
7258 | Set_Is_Dispatch_Table_Entity (DT); | |
7259 | Set_Is_Dispatch_Table_Entity (Etype (DT)); | |
7260 | end if; | |
7261 | ||
d04be62f | 7262 | if Present (Iface_DT) then |
7263 | Set_Is_Dispatch_Table_Entity (Iface_DT); | |
7264 | Set_Is_Dispatch_Table_Entity (Etype (Iface_DT)); | |
7265 | end if; | |
7266 | ||
d00681a7 | 7267 | if Is_CPP_Class (Root_Type (Typ)) then |
7268 | Set_Ekind (DT_Ptr, E_Variable); | |
7269 | else | |
7270 | Set_Ekind (DT_Ptr, E_Constant); | |
7271 | end if; | |
7272 | ||
cdb1c38f | 7273 | Set_Is_Tag (DT_Ptr); |
7274 | Set_Related_Type (DT_Ptr, Typ); | |
7275 | ||
17e14451 | 7276 | return Result; |
7277 | end Make_Tags; | |
7278 | ||
cd534f03 | 7279 | --------------- |
7280 | -- New_Value -- | |
7281 | --------------- | |
7282 | ||
7283 | function New_Value (From : Node_Id) return Node_Id is | |
7284 | Res : constant Node_Id := Duplicate_Subexpr (From); | |
7285 | begin | |
7286 | if Is_Access_Type (Etype (From)) then | |
02a2406d | 7287 | return Make_Explicit_Dereference (Sloc (From), Prefix => Res); |
cd534f03 | 7288 | else |
7289 | return Res; | |
7290 | end if; | |
7291 | end New_Value; | |
7292 | ||
ee6ba406 | 7293 | ----------------------------------- |
7294 | -- Original_View_In_Visible_Part -- | |
7295 | ----------------------------------- | |
7296 | ||
7297 | function Original_View_In_Visible_Part (Typ : Entity_Id) return Boolean is | |
7298 | Scop : constant Entity_Id := Scope (Typ); | |
7299 | ||
7300 | begin | |
7301 | -- The scope must be a package | |
7302 | ||
65149aa0 | 7303 | if not Is_Package_Or_Generic_Package (Scop) then |
ee6ba406 | 7304 | return False; |
7305 | end if; | |
7306 | ||
7307 | -- A type with a private declaration has a private view declared in | |
7308 | -- the visible part. | |
7309 | ||
7310 | if Has_Private_Declaration (Typ) then | |
7311 | return True; | |
7312 | end if; | |
7313 | ||
7314 | return List_Containing (Parent (Typ)) = | |
e8b4793a | 7315 | Visible_Declarations (Package_Specification (Scop)); |
ee6ba406 | 7316 | end Original_View_In_Visible_Part; |
7317 | ||
d62940bf | 7318 | ------------------ |
7319 | -- Prim_Op_Kind -- | |
7320 | ------------------ | |
7321 | ||
7322 | function Prim_Op_Kind | |
7323 | (Prim : Entity_Id; | |
7324 | Typ : Entity_Id) return Node_Id | |
7325 | is | |
7326 | Full_Typ : Entity_Id := Typ; | |
7327 | Loc : constant Source_Ptr := Sloc (Prim); | |
68f95949 | 7328 | Prim_Op : Entity_Id; |
d62940bf | 7329 | |
7330 | begin | |
7331 | -- Retrieve the original primitive operation | |
7332 | ||
fc2907f6 | 7333 | Prim_Op := Ultimate_Alias (Prim); |
d62940bf | 7334 | |
7335 | if Ekind (Typ) = E_Record_Type | |
7336 | and then Present (Corresponding_Concurrent_Type (Typ)) | |
7337 | then | |
7338 | Full_Typ := Corresponding_Concurrent_Type (Typ); | |
7339 | end if; | |
7340 | ||
d77e048b | 7341 | -- When a private tagged type is completed by a concurrent type, |
7342 | -- retrieve the full view. | |
7343 | ||
7344 | if Is_Private_Type (Full_Typ) then | |
7345 | Full_Typ := Full_View (Full_Typ); | |
7346 | end if; | |
7347 | ||
d62940bf | 7348 | if Ekind (Prim_Op) = E_Function then |
7349 | ||
7350 | -- Protected function | |
7351 | ||
7352 | if Ekind (Full_Typ) = E_Protected_Type then | |
83c6c069 | 7353 | return New_Occurrence_Of (RTE (RE_POK_Protected_Function), Loc); |
d62940bf | 7354 | |
76a1c25b | 7355 | -- Task function |
7356 | ||
7357 | elsif Ekind (Full_Typ) = E_Task_Type then | |
83c6c069 | 7358 | return New_Occurrence_Of (RTE (RE_POK_Task_Function), Loc); |
76a1c25b | 7359 | |
d62940bf | 7360 | -- Regular function |
7361 | ||
7362 | else | |
83c6c069 | 7363 | return New_Occurrence_Of (RTE (RE_POK_Function), Loc); |
d62940bf | 7364 | end if; |
7365 | ||
7366 | else | |
7367 | pragma Assert (Ekind (Prim_Op) = E_Procedure); | |
7368 | ||
7369 | if Ekind (Full_Typ) = E_Protected_Type then | |
7370 | ||
7371 | -- Protected entry | |
7372 | ||
7373 | if Is_Primitive_Wrapper (Prim_Op) | |
7374 | and then Ekind (Wrapped_Entity (Prim_Op)) = E_Entry | |
7375 | then | |
83c6c069 | 7376 | return New_Occurrence_Of (RTE (RE_POK_Protected_Entry), Loc); |
d62940bf | 7377 | |
7378 | -- Protected procedure | |
7379 | ||
7380 | else | |
83c6c069 | 7381 | return |
7382 | New_Occurrence_Of (RTE (RE_POK_Protected_Procedure), Loc); | |
d62940bf | 7383 | end if; |
7384 | ||
7385 | elsif Ekind (Full_Typ) = E_Task_Type then | |
7386 | ||
7387 | -- Task entry | |
7388 | ||
7389 | if Is_Primitive_Wrapper (Prim_Op) | |
7390 | and then Ekind (Wrapped_Entity (Prim_Op)) = E_Entry | |
7391 | then | |
83c6c069 | 7392 | return New_Occurrence_Of (RTE (RE_POK_Task_Entry), Loc); |
d62940bf | 7393 | |
7394 | -- Task "procedure". These are the internally Expander-generated | |
7395 | -- procedures (task body for instance). | |
7396 | ||
7397 | else | |
83c6c069 | 7398 | return New_Occurrence_Of (RTE (RE_POK_Task_Procedure), Loc); |
d62940bf | 7399 | end if; |
7400 | ||
7401 | -- Regular procedure | |
7402 | ||
7403 | else | |
83c6c069 | 7404 | return New_Occurrence_Of (RTE (RE_POK_Procedure), Loc); |
d62940bf | 7405 | end if; |
7406 | end if; | |
7407 | end Prim_Op_Kind; | |
7408 | ||
725a69d2 | 7409 | ------------------------ |
7410 | -- Register_Primitive -- | |
7411 | ------------------------ | |
7412 | ||
49260fa5 | 7413 | function Register_Primitive |
725a69d2 | 7414 | (Loc : Source_Ptr; |
49260fa5 | 7415 | Prim : Entity_Id) return List_Id |
725a69d2 | 7416 | is |
cdb1c38f | 7417 | DT_Ptr : Entity_Id; |
7418 | Iface_Prim : Entity_Id; | |
7419 | Iface_Typ : Entity_Id; | |
7420 | Iface_DT_Ptr : Entity_Id; | |
7421 | Iface_DT_Elmt : Elmt_Id; | |
49260fa5 | 7422 | L : constant List_Id := New_List; |
cdb1c38f | 7423 | Pos : Uint; |
7424 | Tag : Entity_Id; | |
cc60bd16 | 7425 | Tag_Typ : Entity_Id; |
cdb1c38f | 7426 | Thunk_Id : Entity_Id; |
7427 | Thunk_Code : Node_Id; | |
725a69d2 | 7428 | |
7429 | begin | |
7430 | pragma Assert (not Restriction_Active (No_Dispatching_Calls)); | |
7431 | ||
3f8cf2d2 | 7432 | -- Do not register in the dispatch table eliminated primitives |
7433 | ||
7434 | if not RTE_Available (RE_Tag) | |
7435 | or else Is_Eliminated (Ultimate_Alias (Prim)) | |
83d39cd3 | 7436 | or else Generate_SCIL |
3f8cf2d2 | 7437 | then |
49260fa5 | 7438 | return L; |
725a69d2 | 7439 | end if; |
7440 | ||
a652dd51 | 7441 | if not Present (Interface_Alias (Prim)) then |
cc60bd16 | 7442 | Tag_Typ := Scope (DTC_Entity (Prim)); |
acf97c11 | 7443 | Pos := DT_Position (Prim); |
cc60bd16 | 7444 | Tag := First_Tag_Component (Tag_Typ); |
725a69d2 | 7445 | |
7446 | if Is_Predefined_Dispatching_Operation (Prim) | |
7447 | or else Is_Predefined_Dispatching_Alias (Prim) | |
7448 | then | |
cc60bd16 | 7449 | DT_Ptr := |
7450 | Node (Next_Elmt (First_Elmt (Access_Disp_Table (Tag_Typ)))); | |
7451 | ||
49260fa5 | 7452 | Append_To (L, |
725a69d2 | 7453 | Build_Set_Predefined_Prim_Op_Address (Loc, |
83c6c069 | 7454 | Tag_Node => New_Occurrence_Of (DT_Ptr, Loc), |
725a69d2 | 7455 | Position => Pos, |
acf97c11 | 7456 | Address_Node => |
cc60bd16 | 7457 | Unchecked_Convert_To (RTE (RE_Prim_Ptr), |
acf97c11 | 7458 | Make_Attribute_Reference (Loc, |
83c6c069 | 7459 | Prefix => New_Occurrence_Of (Prim, Loc), |
acf97c11 | 7460 | Attribute_Name => Name_Unrestricted_Access)))); |
725a69d2 | 7461 | |
9e7de1e1 | 7462 | -- Register copy of the pointer to the 'size primitive in the TSD |
cc60bd16 | 7463 | |
7464 | if Chars (Prim) = Name_uSize | |
7465 | and then RTE_Record_Component_Available (RE_Size_Func) | |
7466 | then | |
7467 | DT_Ptr := Node (First_Elmt (Access_Disp_Table (Tag_Typ))); | |
49260fa5 | 7468 | Append_To (L, |
cc60bd16 | 7469 | Build_Set_Size_Function (Loc, |
83c6c069 | 7470 | Tag_Node => New_Occurrence_Of (DT_Ptr, Loc), |
cc60bd16 | 7471 | Size_Func => Prim)); |
7472 | end if; | |
7473 | ||
725a69d2 | 7474 | else |
7475 | pragma Assert (Pos /= Uint_0 and then Pos <= DT_Entry_Count (Tag)); | |
7476 | ||
d00681a7 | 7477 | -- Skip registration of primitives located in the C++ part of the |
7478 | -- dispatch table. Their slot is set by the IC routine. | |
7479 | ||
7480 | if not Is_CPP_Class (Root_Type (Tag_Typ)) | |
7481 | or else Pos > CPP_Num_Prims (Tag_Typ) | |
7482 | then | |
7483 | DT_Ptr := Node (First_Elmt (Access_Disp_Table (Tag_Typ))); | |
7484 | Append_To (L, | |
7485 | Build_Set_Prim_Op_Address (Loc, | |
7486 | Typ => Tag_Typ, | |
83c6c069 | 7487 | Tag_Node => New_Occurrence_Of (DT_Ptr, Loc), |
d00681a7 | 7488 | Position => Pos, |
7489 | Address_Node => | |
7490 | Unchecked_Convert_To (RTE (RE_Prim_Ptr), | |
7491 | Make_Attribute_Reference (Loc, | |
83c6c069 | 7492 | Prefix => New_Occurrence_Of (Prim, Loc), |
d00681a7 | 7493 | Attribute_Name => Name_Unrestricted_Access)))); |
7494 | end if; | |
725a69d2 | 7495 | end if; |
7496 | ||
7497 | -- Ada 2005 (AI-251): Primitive associated with an interface type | |
02a2406d | 7498 | |
725a69d2 | 7499 | -- Generate the code of the thunk only if the interface type is not an |
7500 | -- immediate ancestor of Typ; otherwise the dispatch table associated | |
7501 | -- with the interface is the primary dispatch table and we have nothing | |
7502 | -- else to do here. | |
7503 | ||
7504 | else | |
cc60bd16 | 7505 | Tag_Typ := Find_Dispatching_Type (Alias (Prim)); |
a652dd51 | 7506 | Iface_Typ := Find_Dispatching_Type (Interface_Alias (Prim)); |
725a69d2 | 7507 | |
7508 | pragma Assert (Is_Interface (Iface_Typ)); | |
7509 | ||
c8da6114 | 7510 | -- No action needed for interfaces that are ancestors of Typ because |
7511 | -- their primitives are located in the primary dispatch table. | |
7512 | ||
cb4af01d | 7513 | if Is_Ancestor (Iface_Typ, Tag_Typ, Use_Full_View => True) then |
c8da6114 | 7514 | return L; |
d00681a7 | 7515 | |
7516 | -- No action needed for primitives located in the C++ part of the | |
7517 | -- dispatch table. Their slot is set by the IC routine. | |
7518 | ||
7519 | elsif Is_CPP_Class (Root_Type (Tag_Typ)) | |
7520 | and then DT_Position (Alias (Prim)) <= CPP_Num_Prims (Tag_Typ) | |
7521 | and then not Is_Predefined_Dispatching_Operation (Prim) | |
7522 | and then not Is_Predefined_Dispatching_Alias (Prim) | |
7523 | then | |
7524 | return L; | |
c8da6114 | 7525 | end if; |
7526 | ||
17e14451 | 7527 | Expand_Interface_Thunk (Prim, Thunk_Id, Thunk_Code); |
725a69d2 | 7528 | |
cb4af01d | 7529 | if not Is_Ancestor (Iface_Typ, Tag_Typ, Use_Full_View => True) |
725a69d2 | 7530 | and then Present (Thunk_Code) |
7531 | then | |
725a69d2 | 7532 | -- Generate the code necessary to fill the appropriate entry of |
7533 | -- the secondary dispatch table of Prim's controlling type with | |
7534 | -- Thunk_Id's address. | |
7535 | ||
cc60bd16 | 7536 | Iface_DT_Elmt := Find_Interface_ADT (Tag_Typ, Iface_Typ); |
cdb1c38f | 7537 | Iface_DT_Ptr := Node (Iface_DT_Elmt); |
7538 | pragma Assert (Has_Thunks (Iface_DT_Ptr)); | |
7539 | ||
a652dd51 | 7540 | Iface_Prim := Interface_Alias (Prim); |
acf97c11 | 7541 | Pos := DT_Position (Iface_Prim); |
7542 | Tag := First_Tag_Component (Iface_Typ); | |
49260fa5 | 7543 | |
7544 | Prepend_To (L, Thunk_Code); | |
725a69d2 | 7545 | |
7546 | if Is_Predefined_Dispatching_Operation (Prim) | |
7547 | or else Is_Predefined_Dispatching_Alias (Prim) | |
7548 | then | |
cdb1c38f | 7549 | Append_To (L, |
725a69d2 | 7550 | Build_Set_Predefined_Prim_Op_Address (Loc, |
acf97c11 | 7551 | Tag_Node => |
83c6c069 | 7552 | New_Occurrence_Of (Node (Next_Elmt (Iface_DT_Elmt)), Loc), |
725a69d2 | 7553 | Position => Pos, |
7554 | Address_Node => | |
cc60bd16 | 7555 | Unchecked_Convert_To (RTE (RE_Prim_Ptr), |
acf97c11 | 7556 | Make_Attribute_Reference (Loc, |
83c6c069 | 7557 | Prefix => New_Occurrence_Of (Thunk_Id, Loc), |
acf97c11 | 7558 | Attribute_Name => Name_Unrestricted_Access)))); |
cdb1c38f | 7559 | |
acf97c11 | 7560 | Next_Elmt (Iface_DT_Elmt); |
cdb1c38f | 7561 | Next_Elmt (Iface_DT_Elmt); |
7562 | Iface_DT_Ptr := Node (Iface_DT_Elmt); | |
7563 | pragma Assert (not Has_Thunks (Iface_DT_Ptr)); | |
7564 | ||
7565 | Append_To (L, | |
7566 | Build_Set_Predefined_Prim_Op_Address (Loc, | |
acf97c11 | 7567 | Tag_Node => |
83c6c069 | 7568 | New_Occurrence_Of (Node (Next_Elmt (Iface_DT_Elmt)), Loc), |
cdb1c38f | 7569 | Position => Pos, |
7570 | Address_Node => | |
cc60bd16 | 7571 | Unchecked_Convert_To (RTE (RE_Prim_Ptr), |
acf97c11 | 7572 | Make_Attribute_Reference (Loc, |
4055a532 | 7573 | Prefix => |
83c6c069 | 7574 | New_Occurrence_Of (Alias (Prim), Loc), |
acf97c11 | 7575 | Attribute_Name => Name_Unrestricted_Access)))); |
cdb1c38f | 7576 | |
725a69d2 | 7577 | else |
7578 | pragma Assert (Pos /= Uint_0 | |
7579 | and then Pos <= DT_Entry_Count (Tag)); | |
7580 | ||
cdb1c38f | 7581 | Append_To (L, |
7582 | Build_Set_Prim_Op_Address (Loc, | |
7583 | Typ => Iface_Typ, | |
83c6c069 | 7584 | Tag_Node => New_Occurrence_Of (Iface_DT_Ptr, Loc), |
cdb1c38f | 7585 | Position => Pos, |
acf97c11 | 7586 | Address_Node => |
cc60bd16 | 7587 | Unchecked_Convert_To (RTE (RE_Prim_Ptr), |
acf97c11 | 7588 | Make_Attribute_Reference (Loc, |
83c6c069 | 7589 | Prefix => New_Occurrence_Of (Thunk_Id, Loc), |
acf97c11 | 7590 | Attribute_Name => Name_Unrestricted_Access)))); |
cdb1c38f | 7591 | |
acf97c11 | 7592 | Next_Elmt (Iface_DT_Elmt); |
cdb1c38f | 7593 | Next_Elmt (Iface_DT_Elmt); |
7594 | Iface_DT_Ptr := Node (Iface_DT_Elmt); | |
7595 | pragma Assert (not Has_Thunks (Iface_DT_Ptr)); | |
7596 | ||
7597 | Append_To (L, | |
725a69d2 | 7598 | Build_Set_Prim_Op_Address (Loc, |
7599 | Typ => Iface_Typ, | |
83c6c069 | 7600 | Tag_Node => New_Occurrence_Of (Iface_DT_Ptr, Loc), |
725a69d2 | 7601 | Position => Pos, |
acf97c11 | 7602 | Address_Node => |
cc60bd16 | 7603 | Unchecked_Convert_To (RTE (RE_Prim_Ptr), |
acf97c11 | 7604 | Make_Attribute_Reference (Loc, |
4055a532 | 7605 | Prefix => |
83c6c069 | 7606 | New_Occurrence_Of (Alias (Prim), Loc), |
acf97c11 | 7607 | Attribute_Name => Name_Unrestricted_Access)))); |
cdb1c38f | 7608 | |
725a69d2 | 7609 | end if; |
7610 | end if; | |
7611 | end if; | |
49260fa5 | 7612 | |
7613 | return L; | |
725a69d2 | 7614 | end Register_Primitive; |
7615 | ||
ee6ba406 | 7616 | ------------------------- |
7617 | -- Set_All_DT_Position -- | |
7618 | ------------------------- | |
7619 | ||
7620 | procedure Set_All_DT_Position (Typ : Entity_Id) is | |
ee6ba406 | 7621 | |
cf365b48 | 7622 | function In_Predef_Prims_DT (Prim : Entity_Id) return Boolean; |
7623 | -- Returns True if Prim is located in the dispatch table of | |
7624 | -- predefined primitives | |
7625 | ||
aad6babd | 7626 | procedure Validate_Position (Prim : Entity_Id); |
02a2406d | 7627 | -- Check that position assigned to Prim is completely safe (it has not |
7628 | -- been assigned to a previously defined primitive operation of Typ). | |
aad6babd | 7629 | |
cf365b48 | 7630 | ------------------------ |
7631 | -- In_Predef_Prims_DT -- | |
7632 | ------------------------ | |
7633 | ||
7634 | function In_Predef_Prims_DT (Prim : Entity_Id) return Boolean is | |
cf365b48 | 7635 | begin |
7636 | -- Predefined primitives | |
7637 | ||
7638 | if Is_Predefined_Dispatching_Operation (Prim) then | |
7639 | return True; | |
7640 | ||
7641 | -- Renamings of predefined primitives | |
7642 | ||
7643 | elsif Present (Alias (Prim)) | |
7644 | and then Is_Predefined_Dispatching_Operation (Ultimate_Alias (Prim)) | |
7645 | then | |
7646 | if Chars (Ultimate_Alias (Prim)) /= Name_Op_Eq then | |
7647 | return True; | |
7648 | ||
4835ef4c | 7649 | -- An overriding operation that is a user-defined renaming of |
7650 | -- predefined equality inherits its slot from the overridden | |
7651 | -- operation. Otherwise it is treated as a predefined op and | |
7652 | -- occupies the same predefined slot as equality. A call to it is | |
7653 | -- transformed into a call to its alias, which is the predefined | |
7654 | -- equality op. A dispatching call thus uses the proper slot if | |
7655 | -- operation is further inherited and called with class-wide | |
7656 | -- arguments. | |
cf365b48 | 7657 | |
7658 | else | |
4835ef4c | 7659 | return |
7660 | not Comes_From_Source (Prim) | |
7661 | or else No (Overridden_Operation (Prim)); | |
cf365b48 | 7662 | end if; |
7663 | ||
7664 | -- User-defined primitives | |
7665 | ||
7666 | else | |
7667 | return False; | |
7668 | end if; | |
7669 | end In_Predef_Prims_DT; | |
7670 | ||
aad6babd | 7671 | ----------------------- |
7672 | -- Validate_Position -- | |
7673 | ----------------------- | |
7674 | ||
7675 | procedure Validate_Position (Prim : Entity_Id) is | |
af647dc7 | 7676 | Op_Elmt : Elmt_Id; |
7677 | Op : Entity_Id; | |
d62940bf | 7678 | |
aad6babd | 7679 | begin |
af647dc7 | 7680 | -- Aliased primitives are safe |
7681 | ||
7682 | if Present (Alias (Prim)) then | |
7683 | return; | |
7684 | end if; | |
7685 | ||
7686 | Op_Elmt := First_Elmt (Primitive_Operations (Typ)); | |
7687 | while Present (Op_Elmt) loop | |
7688 | Op := Node (Op_Elmt); | |
7689 | ||
7690 | -- No need to check against itself | |
7691 | ||
7692 | if Op = Prim then | |
7693 | null; | |
7694 | ||
aad6babd | 7695 | -- Primitive operations covering abstract interfaces are |
7696 | -- allocated later | |
7697 | ||
a652dd51 | 7698 | elsif Present (Interface_Alias (Op)) then |
aad6babd | 7699 | null; |
7700 | ||
68f95949 | 7701 | -- Predefined dispatching operations are completely safe. They |
7702 | -- are allocated at fixed positions in a separate table. | |
aad6babd | 7703 | |
af647dc7 | 7704 | elsif Is_Predefined_Dispatching_Operation (Op) |
7705 | or else Is_Predefined_Dispatching_Alias (Op) | |
7706 | then | |
aad6babd | 7707 | null; |
ee6ba406 | 7708 | |
aad6babd | 7709 | -- Aliased subprograms are safe |
7710 | ||
af647dc7 | 7711 | elsif Present (Alias (Op)) then |
aad6babd | 7712 | null; |
7713 | ||
af647dc7 | 7714 | elsif DT_Position (Op) = DT_Position (Prim) |
7715 | and then not Is_Predefined_Dispatching_Operation (Op) | |
7716 | and then not Is_Predefined_Dispatching_Operation (Prim) | |
7717 | and then not Is_Predefined_Dispatching_Alias (Op) | |
7718 | and then not Is_Predefined_Dispatching_Alias (Prim) | |
7719 | then | |
d62940bf | 7720 | -- Handle aliased subprograms |
7721 | ||
7722 | declare | |
7723 | Op_1 : Entity_Id; | |
7724 | Op_2 : Entity_Id; | |
7725 | ||
7726 | begin | |
af647dc7 | 7727 | Op_1 := Op; |
d62940bf | 7728 | loop |
7729 | if Present (Overridden_Operation (Op_1)) then | |
7730 | Op_1 := Overridden_Operation (Op_1); | |
7731 | elsif Present (Alias (Op_1)) then | |
7732 | Op_1 := Alias (Op_1); | |
7733 | else | |
7734 | exit; | |
7735 | end if; | |
7736 | end loop; | |
7737 | ||
7738 | Op_2 := Prim; | |
7739 | loop | |
7740 | if Present (Overridden_Operation (Op_2)) then | |
7741 | Op_2 := Overridden_Operation (Op_2); | |
7742 | elsif Present (Alias (Op_2)) then | |
7743 | Op_2 := Alias (Op_2); | |
7744 | else | |
7745 | exit; | |
7746 | end if; | |
7747 | end loop; | |
7748 | ||
7749 | if Op_1 /= Op_2 then | |
7750 | raise Program_Error; | |
7751 | end if; | |
7752 | end; | |
aad6babd | 7753 | end if; |
7754 | ||
af647dc7 | 7755 | Next_Elmt (Op_Elmt); |
aad6babd | 7756 | end loop; |
7757 | end Validate_Position; | |
7758 | ||
af647dc7 | 7759 | -- Local variables |
7760 | ||
7761 | Parent_Typ : constant Entity_Id := Etype (Typ); | |
af647dc7 | 7762 | First_Prim : constant Elmt_Id := First_Elmt (Primitive_Operations (Typ)); |
7763 | The_Tag : constant Entity_Id := First_Tag_Component (Typ); | |
7764 | ||
651a38ec | 7765 | Adjusted : Boolean := False; |
7766 | Finalized : Boolean := False; | |
af647dc7 | 7767 | |
343d35dc | 7768 | Count_Prim : Nat; |
7769 | DT_Length : Nat; | |
7770 | Nb_Prim : Nat; | |
af647dc7 | 7771 | Prim : Entity_Id; |
7772 | Prim_Elmt : Elmt_Id; | |
7773 | ||
aad6babd | 7774 | -- Start of processing for Set_All_DT_Position |
7775 | ||
7776 | begin | |
a652dd51 | 7777 | pragma Assert (Present (First_Tag_Component (Typ))); |
7778 | ||
b3dd22b3 | 7779 | -- Set the DT_Position for each primitive operation. Perform some sanity |
7780 | -- checks to avoid building inconsistent dispatch tables. | |
ee6ba406 | 7781 | |
02a2406d | 7782 | -- First stage: Set DTC entity of all the primitive operations. This is |
7783 | -- required to properly read the DT_Position attribute in latter stages. | |
ee6ba406 | 7784 | |
343d35dc | 7785 | Prim_Elmt := First_Prim; |
7786 | Count_Prim := 0; | |
7787 | while Present (Prim_Elmt) loop | |
7788 | Prim := Node (Prim_Elmt); | |
ee6ba406 | 7789 | |
343d35dc | 7790 | -- Predefined primitives have a separate dispatch table |
ee6ba406 | 7791 | |
cf365b48 | 7792 | if not In_Predef_Prims_DT (Prim) then |
343d35dc | 7793 | Count_Prim := Count_Prim + 1; |
7794 | end if; | |
ee6ba406 | 7795 | |
725a69d2 | 7796 | Set_DTC_Entity_Value (Typ, Prim); |
ee6ba406 | 7797 | |
343d35dc | 7798 | -- Clear any previous value of the DT_Position attribute. In this |
7799 | -- way we ensure that the final position of all the primitives is | |
36b938a3 | 7800 | -- established by the following stages of this algorithm. |
ee6ba406 | 7801 | |
ad274a73 | 7802 | Set_DT_Position_Value (Prim, No_Uint); |
ee6ba406 | 7803 | |
343d35dc | 7804 | Next_Elmt (Prim_Elmt); |
7805 | end loop; | |
ee6ba406 | 7806 | |
343d35dc | 7807 | declare |
acf97c11 | 7808 | Fixed_Prim : array (Int range 0 .. Count_Prim) of Boolean := |
7809 | (others => False); | |
7810 | ||
343d35dc | 7811 | E : Entity_Id; |
ee6ba406 | 7812 | |
725a69d2 | 7813 | procedure Handle_Inherited_Private_Subprograms (Typ : Entity_Id); |
7814 | -- Called if Typ is declared in a nested package or a public child | |
7815 | -- package to handle inherited primitives that were inherited by Typ | |
509f74d3 | 7816 | -- in the visible part, but whose declaration was deferred because |
725a69d2 | 7817 | -- the parent operation was private and not visible at that point. |
7818 | ||
343d35dc | 7819 | procedure Set_Fixed_Prim (Pos : Nat); |
7820 | -- Sets to true an element of the Fixed_Prim table to indicate | |
7821 | -- that this entry of the dispatch table of Typ is occupied. | |
ee6ba406 | 7822 | |
725a69d2 | 7823 | ------------------------------------------ |
7824 | -- Handle_Inherited_Private_Subprograms -- | |
7825 | ------------------------------------------ | |
7826 | ||
7827 | procedure Handle_Inherited_Private_Subprograms (Typ : Entity_Id) is | |
7828 | Op_List : Elist_Id; | |
7829 | Op_Elmt : Elmt_Id; | |
7830 | Op_Elmt_2 : Elmt_Id; | |
7831 | Prim_Op : Entity_Id; | |
7832 | Parent_Subp : Entity_Id; | |
7833 | ||
7834 | begin | |
7835 | Op_List := Primitive_Operations (Typ); | |
7836 | ||
7837 | Op_Elmt := First_Elmt (Op_List); | |
7838 | while Present (Op_Elmt) loop | |
7839 | Prim_Op := Node (Op_Elmt); | |
7840 | ||
7841 | -- Search primitives that are implicit operations with an | |
7842 | -- internal name whose parent operation has a normal name. | |
7843 | ||
7844 | if Present (Alias (Prim_Op)) | |
7845 | and then Find_Dispatching_Type (Alias (Prim_Op)) /= Typ | |
7846 | and then not Comes_From_Source (Prim_Op) | |
7847 | and then Is_Internal_Name (Chars (Prim_Op)) | |
7848 | and then not Is_Internal_Name (Chars (Alias (Prim_Op))) | |
7849 | then | |
7850 | Parent_Subp := Alias (Prim_Op); | |
7851 | ||
7852 | -- Check if the type has an explicit overriding for this | |
7853 | -- primitive. | |
7854 | ||
7855 | Op_Elmt_2 := Next_Elmt (Op_Elmt); | |
7856 | while Present (Op_Elmt_2) loop | |
7857 | if Chars (Node (Op_Elmt_2)) = Chars (Parent_Subp) | |
7858 | and then Type_Conformant (Prim_Op, Node (Op_Elmt_2)) | |
7859 | then | |
ad274a73 | 7860 | Set_DT_Position_Value (Prim_Op, |
7861 | DT_Position (Parent_Subp)); | |
7862 | Set_DT_Position_Value (Node (Op_Elmt_2), | |
725a69d2 | 7863 | DT_Position (Parent_Subp)); |
7864 | Set_Fixed_Prim (UI_To_Int (DT_Position (Prim_Op))); | |
7865 | ||
7866 | goto Next_Primitive; | |
7867 | end if; | |
7868 | ||
7869 | Next_Elmt (Op_Elmt_2); | |
7870 | end loop; | |
7871 | end if; | |
7872 | ||
7873 | <<Next_Primitive>> | |
7874 | Next_Elmt (Op_Elmt); | |
7875 | end loop; | |
7876 | end Handle_Inherited_Private_Subprograms; | |
7877 | ||
343d35dc | 7878 | -------------------- |
7879 | -- Set_Fixed_Prim -- | |
7880 | -------------------- | |
ee6ba406 | 7881 | |
343d35dc | 7882 | procedure Set_Fixed_Prim (Pos : Nat) is |
ee6ba406 | 7883 | begin |
9e7de1e1 | 7884 | pragma Assert (Pos <= Count_Prim); |
343d35dc | 7885 | Fixed_Prim (Pos) := True; |
7886 | exception | |
7887 | when Constraint_Error => | |
7888 | raise Program_Error; | |
7889 | end Set_Fixed_Prim; | |
ee6ba406 | 7890 | |
343d35dc | 7891 | begin |
725a69d2 | 7892 | -- In case of nested packages and public child package it may be |
7893 | -- necessary a special management on inherited subprograms so that | |
7894 | -- the dispatch table is properly filled. | |
7895 | ||
7896 | if Ekind (Scope (Scope (Typ))) = E_Package | |
7897 | and then Scope (Scope (Typ)) /= Standard_Standard | |
7898 | and then ((Is_Derived_Type (Typ) and then not Is_Private_Type (Typ)) | |
7899 | or else | |
7900 | (Nkind (Parent (Typ)) = N_Private_Extension_Declaration | |
7901 | and then Is_Generic_Type (Typ))) | |
7902 | and then In_Open_Scopes (Scope (Etype (Typ))) | |
5b990e08 | 7903 | and then Is_Base_Type (Typ) |
725a69d2 | 7904 | then |
7905 | Handle_Inherited_Private_Subprograms (Typ); | |
7906 | end if; | |
7907 | ||
343d35dc | 7908 | -- Second stage: Register fixed entries |
ee6ba406 | 7909 | |
343d35dc | 7910 | Nb_Prim := 0; |
7911 | Prim_Elmt := First_Prim; | |
7912 | while Present (Prim_Elmt) loop | |
7913 | Prim := Node (Prim_Elmt); | |
ee6ba406 | 7914 | |
343d35dc | 7915 | -- Predefined primitives have a separate table and all its |
7916 | -- entries are at predefined fixed positions. | |
ee6ba406 | 7917 | |
cf365b48 | 7918 | if In_Predef_Prims_DT (Prim) then |
7919 | if Is_Predefined_Dispatching_Operation (Prim) then | |
ad274a73 | 7920 | Set_DT_Position_Value (Prim, |
7921 | Default_Prim_Op_Position (Prim)); | |
ee6ba406 | 7922 | |
cf365b48 | 7923 | else pragma Assert (Present (Alias (Prim))); |
ad274a73 | 7924 | Set_DT_Position_Value (Prim, |
cf365b48 | 7925 | Default_Prim_Op_Position (Ultimate_Alias (Prim))); |
7926 | end if; | |
d62940bf | 7927 | |
343d35dc | 7928 | -- Overriding primitives of ancestor abstract interfaces |
ee6ba406 | 7929 | |
a652dd51 | 7930 | elsif Present (Interface_Alias (Prim)) |
7931 | and then Is_Ancestor | |
cb4af01d | 7932 | (Find_Dispatching_Type (Interface_Alias (Prim)), Typ, |
7933 | Use_Full_View => True) | |
343d35dc | 7934 | then |
7935 | pragma Assert (DT_Position (Prim) = No_Uint | |
a652dd51 | 7936 | and then Present (DTC_Entity (Interface_Alias (Prim)))); |
ee6ba406 | 7937 | |
a652dd51 | 7938 | E := Interface_Alias (Prim); |
ad274a73 | 7939 | Set_DT_Position_Value (Prim, DT_Position (E)); |
aad6babd | 7940 | |
343d35dc | 7941 | pragma Assert |
7942 | (DT_Position (Alias (Prim)) = No_Uint | |
7943 | or else DT_Position (Alias (Prim)) = DT_Position (E)); | |
ad274a73 | 7944 | Set_DT_Position_Value (Alias (Prim), DT_Position (E)); |
343d35dc | 7945 | Set_Fixed_Prim (UI_To_Int (DT_Position (Prim))); |
af647dc7 | 7946 | |
ed7f78d7 | 7947 | -- Overriding primitives must use the same entry as the overridden |
7948 | -- primitive. Note that the Alias of the operation is set when the | |
7949 | -- operation is declared by a renaming, in which case it is not | |
7950 | -- overriding. If it renames another primitive it will use the | |
7951 | -- same dispatch table slot, but if it renames an operation in a | |
7952 | -- nested package it's a new primitive and will have its own slot. | |
af647dc7 | 7953 | |
a652dd51 | 7954 | elsif not Present (Interface_Alias (Prim)) |
343d35dc | 7955 | and then Present (Alias (Prim)) |
17e14451 | 7956 | and then Chars (Prim) = Chars (Alias (Prim)) |
ed7f78d7 | 7957 | and then Nkind (Unit_Declaration_Node (Prim)) /= |
7958 | N_Subprogram_Renaming_Declaration | |
af647dc7 | 7959 | then |
ed7f78d7 | 7960 | declare |
7961 | Par_Type : constant Entity_Id := | |
78f327e2 | 7962 | Find_Dispatching_Type (Alias (Prim)); |
7963 | ||
ed7f78d7 | 7964 | begin |
7965 | if Present (Par_Type) | |
7966 | and then Par_Type /= Typ | |
7967 | and then Is_Ancestor (Par_Type, Typ, Use_Full_View => True) | |
7968 | and then Present (DTC_Entity (Alias (Prim))) | |
7969 | then | |
7970 | E := Alias (Prim); | |
7971 | Set_DT_Position_Value (Prim, DT_Position (E)); | |
aad6babd | 7972 | |
ed7f78d7 | 7973 | if not Is_Predefined_Dispatching_Alias (E) then |
7974 | Set_Fixed_Prim (UI_To_Int (DT_Position (E))); | |
7975 | end if; | |
7976 | end if; | |
7977 | end; | |
9dfe12ae | 7978 | end if; |
ee6ba406 | 7979 | |
aad6babd | 7980 | Next_Elmt (Prim_Elmt); |
7981 | end loop; | |
7982 | ||
02a2406d | 7983 | -- Third stage: Fix the position of all the new primitives. Entries |
7984 | -- associated with primitives covering interfaces are handled in a | |
7985 | -- latter round. | |
aad6babd | 7986 | |
343d35dc | 7987 | Prim_Elmt := First_Prim; |
7988 | while Present (Prim_Elmt) loop | |
7989 | Prim := Node (Prim_Elmt); | |
aad6babd | 7990 | |
343d35dc | 7991 | -- Skip primitives previously set entries |
aad6babd | 7992 | |
343d35dc | 7993 | if DT_Position (Prim) /= No_Uint then |
7994 | null; | |
aad6babd | 7995 | |
343d35dc | 7996 | -- Primitives covering interface primitives are handled later |
aad6babd | 7997 | |
a652dd51 | 7998 | elsif Present (Interface_Alias (Prim)) then |
343d35dc | 7999 | null; |
aad6babd | 8000 | |
343d35dc | 8001 | else |
8002 | -- Take the next available position in the DT | |
aad6babd | 8003 | |
343d35dc | 8004 | loop |
8005 | Nb_Prim := Nb_Prim + 1; | |
8006 | pragma Assert (Nb_Prim <= Count_Prim); | |
8007 | exit when not Fixed_Prim (Nb_Prim); | |
8008 | end loop; | |
aad6babd | 8009 | |
ad274a73 | 8010 | Set_DT_Position_Value (Prim, UI_From_Int (Nb_Prim)); |
343d35dc | 8011 | Set_Fixed_Prim (Nb_Prim); |
8012 | end if; | |
aad6babd | 8013 | |
343d35dc | 8014 | Next_Elmt (Prim_Elmt); |
8015 | end loop; | |
8016 | end; | |
aad6babd | 8017 | |
343d35dc | 8018 | -- Fourth stage: Complete the decoration of primitives covering |
02a2406d | 8019 | -- interfaces (that is, propagate the DT_Position attribute from |
8020 | -- the aliased primitive) | |
aad6babd | 8021 | |
343d35dc | 8022 | Prim_Elmt := First_Prim; |
8023 | while Present (Prim_Elmt) loop | |
8024 | Prim := Node (Prim_Elmt); | |
aad6babd | 8025 | |
343d35dc | 8026 | if DT_Position (Prim) = No_Uint |
a652dd51 | 8027 | and then Present (Interface_Alias (Prim)) |
343d35dc | 8028 | then |
8029 | pragma Assert (Present (Alias (Prim)) | |
8030 | and then Find_Dispatching_Type (Alias (Prim)) = Typ); | |
aad6babd | 8031 | |
343d35dc | 8032 | -- Check if this entry will be placed in the primary DT |
aad6babd | 8033 | |
a652dd51 | 8034 | if Is_Ancestor |
cb4af01d | 8035 | (Find_Dispatching_Type (Interface_Alias (Prim)), Typ, |
8036 | Use_Full_View => True) | |
ee6ba406 | 8037 | then |
343d35dc | 8038 | pragma Assert (DT_Position (Alias (Prim)) /= No_Uint); |
ad274a73 | 8039 | Set_DT_Position_Value (Prim, DT_Position (Alias (Prim))); |
aad6babd | 8040 | |
343d35dc | 8041 | -- Otherwise it will be placed in the secondary DT |
aad6babd | 8042 | |
343d35dc | 8043 | else |
8044 | pragma Assert | |
a652dd51 | 8045 | (DT_Position (Interface_Alias (Prim)) /= No_Uint); |
ad274a73 | 8046 | Set_DT_Position_Value (Prim, |
a652dd51 | 8047 | DT_Position (Interface_Alias (Prim))); |
aad6babd | 8048 | end if; |
343d35dc | 8049 | end if; |
aad6babd | 8050 | |
343d35dc | 8051 | Next_Elmt (Prim_Elmt); |
8052 | end loop; | |
d62940bf | 8053 | |
02a2406d | 8054 | -- Generate listing showing the contents of the dispatch tables. This |
8055 | -- action is done before some further static checks because in case of | |
8056 | -- critical errors caused by a wrong dispatch table we need to see the | |
8057 | -- contents of such table. | |
d62940bf | 8058 | |
343d35dc | 8059 | if Debug_Flag_ZZ then |
8060 | Write_DT (Typ); | |
8061 | end if; | |
aad6babd | 8062 | |
343d35dc | 8063 | -- Final stage: Ensure that the table is correct plus some further |
8064 | -- verifications concerning the primitives. | |
aad6babd | 8065 | |
343d35dc | 8066 | Prim_Elmt := First_Prim; |
8067 | DT_Length := 0; | |
8068 | while Present (Prim_Elmt) loop | |
8069 | Prim := Node (Prim_Elmt); | |
aad6babd | 8070 | |
02a2406d | 8071 | -- At this point all the primitives MUST have a position in the |
8072 | -- dispatch table. | |
aad6babd | 8073 | |
343d35dc | 8074 | if DT_Position (Prim) = No_Uint then |
8075 | raise Program_Error; | |
8076 | end if; | |
aad6babd | 8077 | |
343d35dc | 8078 | -- Calculate real size of the dispatch table |
aad6babd | 8079 | |
cf365b48 | 8080 | if not In_Predef_Prims_DT (Prim) |
343d35dc | 8081 | and then UI_To_Int (DT_Position (Prim)) > DT_Length |
8082 | then | |
8083 | DT_Length := UI_To_Int (DT_Position (Prim)); | |
8084 | end if; | |
aad6babd | 8085 | |
02a2406d | 8086 | -- Ensure that the assigned position to non-predefined dispatching |
8087 | -- operations in the dispatch table is correct. | |
aad6babd | 8088 | |
cf365b48 | 8089 | if not Is_Predefined_Dispatching_Operation (Prim) |
8090 | and then not Is_Predefined_Dispatching_Alias (Prim) | |
343d35dc | 8091 | then |
8092 | Validate_Position (Prim); | |
8093 | end if; | |
ee6ba406 | 8094 | |
343d35dc | 8095 | if Chars (Prim) = Name_Finalize then |
8096 | Finalized := True; | |
8097 | end if; | |
ee6ba406 | 8098 | |
343d35dc | 8099 | if Chars (Prim) = Name_Adjust then |
8100 | Adjusted := True; | |
8101 | end if; | |
af647dc7 | 8102 | |
503f7fd3 | 8103 | -- An abstract operation cannot be declared in the private part for a |
8104 | -- visible abstract type, because it can't be overridden outside this | |
8105 | -- package hierarchy. For explicit declarations this is checked at | |
8106 | -- the point of declaration, but for inherited operations it must be | |
8107 | -- done when building the dispatch table. | |
343d35dc | 8108 | |
a652dd51 | 8109 | -- Ada 2005 (AI-251): Primitives associated with interfaces are |
8110 | -- excluded from this check because interfaces must be visible in | |
8111 | -- the public and private part (RM 7.3 (7.3/2)) | |
343d35dc | 8112 | |
02a2406d | 8113 | -- We disable this check in Relaxed_RM_Semantics mode, to accommodate |
8114 | -- legacy Ada code. | |
6da4d289 | 8115 | |
a9cd517c | 8116 | if not Relaxed_RM_Semantics |
6da4d289 | 8117 | and then Is_Abstract_Type (Typ) |
343d35dc | 8118 | and then Is_Abstract_Subprogram (Prim) |
8119 | and then Present (Alias (Prim)) | |
a652dd51 | 8120 | and then not Is_Interface |
8121 | (Find_Dispatching_Type (Ultimate_Alias (Prim))) | |
8122 | and then not Present (Interface_Alias (Prim)) | |
343d35dc | 8123 | and then Is_Derived_Type (Typ) |
8124 | and then In_Private_Part (Current_Scope) | |
8125 | and then | |
8126 | List_Containing (Parent (Prim)) = | |
e8b4793a | 8127 | Private_Declarations (Package_Specification (Current_Scope)) |
343d35dc | 8128 | and then Original_View_In_Visible_Part (Typ) |
8129 | then | |
8130 | -- We exclude Input and Output stream operations because | |
02a2406d | 8131 | -- Limited_Controlled inherits useless Input and Output stream |
8132 | -- operations from Root_Controlled, which can never be overridden. | |
ee6ba406 | 8133 | |
343d35dc | 8134 | if not Is_TSS (Prim, TSS_Stream_Input) |
8135 | and then | |
8136 | not Is_TSS (Prim, TSS_Stream_Output) | |
ee6ba406 | 8137 | then |
503f7fd3 | 8138 | Error_Msg_NE |
343d35dc | 8139 | ("abstract inherited private operation&" & |
17e14451 | 8140 | " must be overridden (RM 3.9.3(10))", |
343d35dc | 8141 | Parent (Typ), Prim); |
ee6ba406 | 8142 | end if; |
343d35dc | 8143 | end if; |
aad6babd | 8144 | |
343d35dc | 8145 | Next_Elmt (Prim_Elmt); |
8146 | end loop; | |
ee6ba406 | 8147 | |
343d35dc | 8148 | -- Additional check |
aad6babd | 8149 | |
343d35dc | 8150 | if Is_Controlled (Typ) then |
8151 | if not Finalized then | |
503f7fd3 | 8152 | Error_Msg_N |
cb97ae5c | 8153 | ("controlled type has no explicit Finalize method??", Typ); |
ee6ba406 | 8154 | |
343d35dc | 8155 | elsif not Adjusted then |
503f7fd3 | 8156 | Error_Msg_N |
cb97ae5c | 8157 | ("controlled type has no explicit Adjust method??", Typ); |
ee6ba406 | 8158 | end if; |
343d35dc | 8159 | end if; |
ee6ba406 | 8160 | |
343d35dc | 8161 | -- Set the final size of the Dispatch Table |
aad6babd | 8162 | |
343d35dc | 8163 | Set_DT_Entry_Count (The_Tag, UI_From_Int (DT_Length)); |
ee6ba406 | 8164 | |
725a69d2 | 8165 | -- The derived type must have at least as many components as its parent |
acf97c11 | 8166 | -- (for root types Etype points to itself and the test cannot fail). |
aad6babd | 8167 | |
725a69d2 | 8168 | if DT_Entry_Count (The_Tag) < |
8169 | DT_Entry_Count (First_Tag_Component (Parent_Typ)) | |
8170 | then | |
8171 | raise Program_Error; | |
aad6babd | 8172 | end if; |
ee6ba406 | 8173 | end Set_All_DT_Position; |
8174 | ||
294b942d | 8175 | -------------------------- |
8176 | -- Set_CPP_Constructors -- | |
8177 | -------------------------- | |
ee6ba406 | 8178 | |
294b942d | 8179 | procedure Set_CPP_Constructors (Typ : Entity_Id) is |
d00681a7 | 8180 | |
95773554 | 8181 | function Gen_Parameters_Profile (E : Entity_Id) return List_Id; |
8182 | -- Duplicate the parameters profile of the imported C++ constructor | |
cefcaf9d | 8183 | -- adding the "this" pointer to the object as the additional first |
8184 | -- parameter under the usual form _Init : in out Typ. | |
d00681a7 | 8185 | |
02a2406d | 8186 | ---------------------------- |
8187 | -- Gen_Parameters_Profile -- | |
8188 | ---------------------------- | |
8189 | ||
95773554 | 8190 | function Gen_Parameters_Profile (E : Entity_Id) return List_Id is |
8191 | Loc : constant Source_Ptr := Sloc (E); | |
8192 | Parms : List_Id; | |
8193 | P : Node_Id; | |
b8a17a21 | 8194 | |
d00681a7 | 8195 | begin |
95773554 | 8196 | Parms := |
8197 | New_List ( | |
8198 | Make_Parameter_Specification (Loc, | |
8199 | Defining_Identifier => | |
8200 | Make_Defining_Identifier (Loc, Name_uInit), | |
cefcaf9d | 8201 | In_Present => True, |
8202 | Out_Present => True, | |
83c6c069 | 8203 | Parameter_Type => New_Occurrence_Of (Typ, Loc))); |
95773554 | 8204 | |
8205 | if Present (Parameter_Specifications (Parent (E))) then | |
8206 | P := First (Parameter_Specifications (Parent (E))); | |
8207 | while Present (P) loop | |
8208 | Append_To (Parms, | |
8209 | Make_Parameter_Specification (Loc, | |
8210 | Defining_Identifier => | |
8211 | Make_Defining_Identifier (Loc, | |
8212 | Chars => Chars (Defining_Identifier (P))), | |
8213 | Parameter_Type => New_Copy_Tree (Parameter_Type (P)), | |
8214 | Expression => New_Copy_Tree (Expression (P)))); | |
8215 | Next (P); | |
8216 | end loop; | |
d00681a7 | 8217 | end if; |
b8a17a21 | 8218 | |
95773554 | 8219 | return Parms; |
8220 | end Gen_Parameters_Profile; | |
d00681a7 | 8221 | |
8222 | -- Local variables | |
8223 | ||
95773554 | 8224 | Loc : Source_Ptr; |
8225 | E : Entity_Id; | |
8226 | Found : Boolean := False; | |
8227 | IP : Entity_Id; | |
8228 | IP_Body : Node_Id; | |
8229 | P : Node_Id; | |
8230 | Parms : List_Id; | |
d00681a7 | 8231 | |
c1b63034 | 8232 | Covers_Default_Constructor : Entity_Id := Empty; |
8233 | ||
8234 | -- Start of processing for Set_CPP_Constructor | |
8235 | ||
ee6ba406 | 8236 | begin |
d00681a7 | 8237 | pragma Assert (Is_CPP_Class (Typ)); |
8238 | ||
294b942d | 8239 | -- Look for the constructor entities |
ee6ba406 | 8240 | |
8241 | E := Next_Entity (Typ); | |
294b942d | 8242 | while Present (E) loop |
8243 | if Ekind (E) = E_Function | |
8244 | and then Is_Constructor (E) | |
8245 | then | |
294b942d | 8246 | Found := True; |
8247 | Loc := Sloc (E); | |
95773554 | 8248 | Parms := Gen_Parameters_Profile (E); |
cefcaf9d | 8249 | IP := Make_Defining_Identifier (Loc, Make_Init_Proc_Name (Typ)); |
95773554 | 8250 | |
d1a2e31b | 8251 | -- Case 1: Constructor of untagged type |
95773554 | 8252 | |
8253 | -- If the C++ class has no virtual methods then the matching Ada | |
d1a2e31b | 8254 | -- type is an untagged record type. In such case there is no need |
95773554 | 8255 | -- to generate a wrapper of the C++ constructor because the _tag |
8256 | -- component is not available. | |
8257 | ||
8258 | if not Is_Tagged_Type (Typ) then | |
8259 | Discard_Node | |
8260 | (Make_Subprogram_Declaration (Loc, | |
8261 | Specification => | |
8262 | Make_Procedure_Specification (Loc, | |
8263 | Defining_Unit_Name => IP, | |
8264 | Parameter_Specifications => Parms))); | |
8265 | ||
8266 | Set_Init_Proc (Typ, IP); | |
8267 | Set_Is_Imported (IP); | |
8268 | Set_Is_Constructor (IP); | |
8269 | Set_Interface_Name (IP, Interface_Name (E)); | |
8270 | Set_Convention (IP, Convention_CPP); | |
8271 | Set_Is_Public (IP); | |
8272 | Set_Has_Completion (IP); | |
8273 | ||
8274 | -- Case 2: Constructor of a tagged type | |
8275 | ||
cefcaf9d | 8276 | -- In this case we generate the IP routine as a wrapper of the |
8277 | -- C++ constructor because IP must also save a copy of the _tag | |
95773554 | 8278 | -- generated in the C++ side. The copy of the _tag is used by |
8279 | -- Build_CPP_Init_Procedure to elaborate derivations of C++ types. | |
d00681a7 | 8280 | |
95773554 | 8281 | -- Generate: |
cefcaf9d | 8282 | -- procedure IP (_init : in out Typ; ...) is |
8283 | -- procedure ConstructorP (_init : in out Typ; ...); | |
95773554 | 8284 | -- pragma Import (ConstructorP); |
8285 | -- begin | |
8286 | -- ConstructorP (_init, ...); | |
8287 | -- if Typ._tag = null then | |
8288 | -- Typ._tag := _init._tag; | |
8289 | -- end if; | |
8290 | -- end IP; | |
d00681a7 | 8291 | |
95773554 | 8292 | else |
8293 | declare | |
8294 | Body_Stmts : constant List_Id := New_List; | |
8295 | Constructor_Id : Entity_Id; | |
8296 | Constructor_Decl_Node : Node_Id; | |
8297 | Init_Tags_List : List_Id; | |
d00681a7 | 8298 | |
95773554 | 8299 | begin |
8300 | Constructor_Id := Make_Temporary (Loc, 'P'); | |
d00681a7 | 8301 | |
95773554 | 8302 | Constructor_Decl_Node := |
8303 | Make_Subprogram_Declaration (Loc, | |
8304 | Make_Procedure_Specification (Loc, | |
8305 | Defining_Unit_Name => Constructor_Id, | |
8306 | Parameter_Specifications => Parms)); | |
d00681a7 | 8307 | |
95773554 | 8308 | Set_Is_Imported (Constructor_Id); |
8309 | Set_Is_Constructor (Constructor_Id); | |
8310 | Set_Interface_Name (Constructor_Id, Interface_Name (E)); | |
8311 | Set_Convention (Constructor_Id, Convention_CPP); | |
8312 | Set_Is_Public (Constructor_Id); | |
8313 | Set_Has_Completion (Constructor_Id); | |
d00681a7 | 8314 | |
95773554 | 8315 | -- Build the init procedure as a wrapper of this constructor |
d00681a7 | 8316 | |
95773554 | 8317 | Parms := Gen_Parameters_Profile (E); |
d00681a7 | 8318 | |
95773554 | 8319 | -- Invoke the C++ constructor |
d00681a7 | 8320 | |
95773554 | 8321 | declare |
8322 | Actuals : constant List_Id := New_List; | |
d00681a7 | 8323 | |
95773554 | 8324 | begin |
8325 | P := First (Parms); | |
8326 | while Present (P) loop | |
8327 | Append_To (Actuals, | |
83c6c069 | 8328 | New_Occurrence_Of (Defining_Identifier (P), Loc)); |
95773554 | 8329 | Next (P); |
8330 | end loop; | |
d00681a7 | 8331 | |
95773554 | 8332 | Append_To (Body_Stmts, |
8333 | Make_Procedure_Call_Statement (Loc, | |
83c6c069 | 8334 | Name => New_Occurrence_Of (Constructor_Id, Loc), |
95773554 | 8335 | Parameter_Associations => Actuals)); |
8336 | end; | |
d00681a7 | 8337 | |
95773554 | 8338 | -- Initialize copies of C++ primary and secondary tags |
d00681a7 | 8339 | |
95773554 | 8340 | Init_Tags_List := New_List; |
d00681a7 | 8341 | |
95773554 | 8342 | declare |
8343 | Tag_Elmt : Elmt_Id; | |
8344 | Tag_Comp : Node_Id; | |
d00681a7 | 8345 | |
95773554 | 8346 | begin |
8347 | Tag_Elmt := First_Elmt (Access_Disp_Table (Typ)); | |
8348 | Tag_Comp := First_Tag_Component (Typ); | |
d00681a7 | 8349 | |
95773554 | 8350 | while Present (Tag_Elmt) |
8351 | and then Is_Tag (Node (Tag_Elmt)) | |
8352 | loop | |
8353 | -- Skip the following assertion with primary tags | |
8354 | -- because Related_Type is not set on primary tag | |
cefcaf9d | 8355 | -- components. |
95773554 | 8356 | |
8357 | pragma Assert | |
8358 | (Tag_Comp = First_Tag_Component (Typ) | |
8359 | or else Related_Type (Node (Tag_Elmt)) | |
8360 | = Related_Type (Tag_Comp)); | |
8361 | ||
8362 | Append_To (Init_Tags_List, | |
8363 | Make_Assignment_Statement (Loc, | |
8364 | Name => | |
83c6c069 | 8365 | New_Occurrence_Of (Node (Tag_Elmt), Loc), |
95773554 | 8366 | Expression => |
8367 | Make_Selected_Component (Loc, | |
8368 | Prefix => | |
8369 | Make_Identifier (Loc, Name_uInit), | |
8370 | Selector_Name => | |
83c6c069 | 8371 | New_Occurrence_Of (Tag_Comp, Loc)))); |
d00681a7 | 8372 | |
95773554 | 8373 | Tag_Comp := Next_Tag_Component (Tag_Comp); |
8374 | Next_Elmt (Tag_Elmt); | |
8375 | end loop; | |
8376 | end; | |
d00681a7 | 8377 | |
95773554 | 8378 | Append_To (Body_Stmts, |
8379 | Make_If_Statement (Loc, | |
8380 | Condition => | |
8381 | Make_Op_Eq (Loc, | |
8382 | Left_Opnd => | |
83c6c069 | 8383 | New_Occurrence_Of |
95773554 | 8384 | (Node (First_Elmt (Access_Disp_Table (Typ))), |
8385 | Loc), | |
8386 | Right_Opnd => | |
8387 | Unchecked_Convert_To (RTE (RE_Tag), | |
83c6c069 | 8388 | New_Occurrence_Of (RTE (RE_Null_Address), Loc))), |
95773554 | 8389 | Then_Statements => Init_Tags_List)); |
8390 | ||
8391 | IP_Body := | |
8392 | Make_Subprogram_Body (Loc, | |
8393 | Specification => | |
8394 | Make_Procedure_Specification (Loc, | |
8395 | Defining_Unit_Name => IP, | |
8396 | Parameter_Specifications => Parms), | |
8397 | Declarations => New_List (Constructor_Decl_Node), | |
8398 | Handled_Statement_Sequence => | |
8399 | Make_Handled_Sequence_Of_Statements (Loc, | |
8400 | Statements => Body_Stmts, | |
8401 | Exception_Handlers => No_List)); | |
8402 | ||
8403 | Discard_Node (IP_Body); | |
8404 | Set_Init_Proc (Typ, IP); | |
8405 | end; | |
8406 | end if; | |
c1b63034 | 8407 | |
02a2406d | 8408 | -- If this constructor has parameters and all its parameters have |
8409 | -- defaults then it covers the default constructor. The semantic | |
8410 | -- analyzer ensures that only one constructor with defaults covers | |
8411 | -- the default constructor. | |
c1b63034 | 8412 | |
8413 | if Present (Parameter_Specifications (Parent (E))) | |
8414 | and then Needs_No_Actuals (E) | |
8415 | then | |
95773554 | 8416 | Covers_Default_Constructor := IP; |
c1b63034 | 8417 | end if; |
294b942d | 8418 | end if; |
8419 | ||
ee6ba406 | 8420 | Next_Entity (E); |
8421 | end loop; | |
8422 | ||
9dfe12ae | 8423 | -- If there are no constructors, mark the type as abstract since we |
ee6ba406 | 8424 | -- won't be able to declare objects of that type. |
8425 | ||
294b942d | 8426 | if not Found then |
343d35dc | 8427 | Set_Is_Abstract_Type (Typ); |
ee6ba406 | 8428 | end if; |
d00681a7 | 8429 | |
c1b63034 | 8430 | -- Handle constructor that has all its parameters with defaults and |
8431 | -- hence it covers the default constructor. We generate a wrapper IP | |
8432 | -- which calls the covering constructor. | |
8433 | ||
8434 | if Present (Covers_Default_Constructor) then | |
95773554 | 8435 | declare |
8436 | Body_Stmts : List_Id; | |
c1b63034 | 8437 | |
95773554 | 8438 | begin |
8439 | Loc := Sloc (Covers_Default_Constructor); | |
c1b63034 | 8440 | |
95773554 | 8441 | Body_Stmts := New_List ( |
8442 | Make_Procedure_Call_Statement (Loc, | |
8443 | Name => | |
83c6c069 | 8444 | New_Occurrence_Of (Covers_Default_Constructor, Loc), |
95773554 | 8445 | Parameter_Associations => New_List ( |
8446 | Make_Identifier (Loc, Name_uInit)))); | |
c1b63034 | 8447 | |
95773554 | 8448 | IP := Make_Defining_Identifier (Loc, Make_Init_Proc_Name (Typ)); |
c1b63034 | 8449 | |
95773554 | 8450 | IP_Body := |
8451 | Make_Subprogram_Body (Loc, | |
8452 | Specification => | |
8453 | Make_Procedure_Specification (Loc, | |
8454 | Defining_Unit_Name => IP, | |
8455 | Parameter_Specifications => New_List ( | |
8456 | Make_Parameter_Specification (Loc, | |
8457 | Defining_Identifier => | |
8458 | Make_Defining_Identifier (Loc, Name_uInit), | |
83c6c069 | 8459 | Parameter_Type => New_Occurrence_Of (Typ, Loc)))), |
c1b63034 | 8460 | |
95773554 | 8461 | Declarations => No_List, |
8462 | ||
8463 | Handled_Statement_Sequence => | |
8464 | Make_Handled_Sequence_Of_Statements (Loc, | |
8465 | Statements => Body_Stmts, | |
8466 | Exception_Handlers => No_List)); | |
8467 | ||
8468 | Discard_Node (IP_Body); | |
8469 | Set_Init_Proc (Typ, IP); | |
8470 | end; | |
c1b63034 | 8471 | end if; |
8472 | ||
d00681a7 | 8473 | -- If the CPP type has constructors then it must import also the default |
8474 | -- C++ constructor. It is required for default initialization of objects | |
8475 | -- of the type. It is also required to elaborate objects of Ada types | |
8476 | -- that are defined as derivations of this CPP type. | |
8477 | ||
8478 | if Has_CPP_Constructors (Typ) | |
8479 | and then No (Init_Proc (Typ)) | |
8480 | then | |
cb97ae5c | 8481 | Error_Msg_N ("??default constructor must be imported from C++", Typ); |
d00681a7 | 8482 | end if; |
294b942d | 8483 | end Set_CPP_Constructors; |
ee6ba406 | 8484 | |
ad274a73 | 8485 | --------------------------- |
8486 | -- Set_DT_Position_Value -- | |
8487 | --------------------------- | |
8488 | ||
8489 | procedure Set_DT_Position_Value (Prim : Entity_Id; Value : Uint) is | |
8490 | begin | |
8491 | Set_DT_Position (Prim, Value); | |
8492 | ||
8493 | -- Propagate the value to the wrapped subprogram (if one is present) | |
8494 | ||
8495 | if Ekind_In (Prim, E_Function, E_Procedure) | |
8496 | and then Is_Primitive_Wrapper (Prim) | |
8497 | and then Present (Wrapped_Entity (Prim)) | |
8498 | and then Is_Dispatching_Operation (Wrapped_Entity (Prim)) | |
8499 | then | |
8500 | Set_DT_Position (Wrapped_Entity (Prim), Value); | |
8501 | end if; | |
8502 | end Set_DT_Position_Value; | |
8503 | ||
725a69d2 | 8504 | -------------------------- |
8505 | -- Set_DTC_Entity_Value -- | |
8506 | -------------------------- | |
8507 | ||
8508 | procedure Set_DTC_Entity_Value | |
8509 | (Tagged_Type : Entity_Id; | |
8510 | Prim : Entity_Id) | |
8511 | is | |
8512 | begin | |
a652dd51 | 8513 | if Present (Interface_Alias (Prim)) |
725a69d2 | 8514 | and then Is_Interface |
a652dd51 | 8515 | (Find_Dispatching_Type (Interface_Alias (Prim))) |
725a69d2 | 8516 | then |
8517 | Set_DTC_Entity (Prim, | |
8518 | Find_Interface_Tag | |
8519 | (T => Tagged_Type, | |
a652dd51 | 8520 | Iface => Find_Dispatching_Type (Interface_Alias (Prim)))); |
725a69d2 | 8521 | else |
8522 | Set_DTC_Entity (Prim, | |
8523 | First_Tag_Component (Tagged_Type)); | |
8524 | end if; | |
ad274a73 | 8525 | |
8526 | -- Propagate the value to the wrapped subprogram (if one is present) | |
8527 | ||
8528 | if Ekind_In (Prim, E_Function, E_Procedure) | |
8529 | and then Is_Primitive_Wrapper (Prim) | |
8530 | and then Present (Wrapped_Entity (Prim)) | |
8531 | and then Is_Dispatching_Operation (Wrapped_Entity (Prim)) | |
8532 | then | |
8533 | Set_DTC_Entity (Wrapped_Entity (Prim), DTC_Entity (Prim)); | |
8534 | end if; | |
725a69d2 | 8535 | end Set_DTC_Entity_Value; |
8536 | ||
952af0b9 | 8537 | ----------------- |
8538 | -- Tagged_Kind -- | |
8539 | ----------------- | |
8540 | ||
8541 | function Tagged_Kind (T : Entity_Id) return Node_Id is | |
8542 | Conc_Typ : Entity_Id; | |
8543 | Loc : constant Source_Ptr := Sloc (T); | |
8544 | ||
8545 | begin | |
68f95949 | 8546 | pragma Assert |
8547 | (Is_Tagged_Type (T) and then RTE_Available (RE_Tagged_Kind)); | |
952af0b9 | 8548 | |
8549 | -- Abstract kinds | |
8550 | ||
343d35dc | 8551 | if Is_Abstract_Type (T) then |
952af0b9 | 8552 | if Is_Limited_Record (T) then |
83c6c069 | 8553 | return New_Occurrence_Of |
8554 | (RTE (RE_TK_Abstract_Limited_Tagged), Loc); | |
952af0b9 | 8555 | else |
83c6c069 | 8556 | return New_Occurrence_Of |
8557 | (RTE (RE_TK_Abstract_Tagged), Loc); | |
952af0b9 | 8558 | end if; |
8559 | ||
8560 | -- Concurrent kinds | |
8561 | ||
8562 | elsif Is_Concurrent_Record_Type (T) then | |
8563 | Conc_Typ := Corresponding_Concurrent_Type (T); | |
8564 | ||
17e14451 | 8565 | if Present (Full_View (Conc_Typ)) then |
8566 | Conc_Typ := Full_View (Conc_Typ); | |
8567 | end if; | |
8568 | ||
952af0b9 | 8569 | if Ekind (Conc_Typ) = E_Protected_Type then |
83c6c069 | 8570 | return New_Occurrence_Of (RTE (RE_TK_Protected), Loc); |
952af0b9 | 8571 | else |
8572 | pragma Assert (Ekind (Conc_Typ) = E_Task_Type); | |
83c6c069 | 8573 | return New_Occurrence_Of (RTE (RE_TK_Task), Loc); |
952af0b9 | 8574 | end if; |
8575 | ||
8576 | -- Regular tagged kinds | |
8577 | ||
8578 | else | |
8579 | if Is_Limited_Record (T) then | |
83c6c069 | 8580 | return New_Occurrence_Of (RTE (RE_TK_Limited_Tagged), Loc); |
952af0b9 | 8581 | else |
83c6c069 | 8582 | return New_Occurrence_Of (RTE (RE_TK_Tagged), Loc); |
952af0b9 | 8583 | end if; |
8584 | end if; | |
8585 | end Tagged_Kind; | |
8586 | ||
aad6babd | 8587 | -------------- |
8588 | -- Write_DT -- | |
8589 | -------------- | |
8590 | ||
8591 | procedure Write_DT (Typ : Entity_Id) is | |
8592 | Elmt : Elmt_Id; | |
8593 | Prim : Node_Id; | |
8594 | ||
8595 | begin | |
8596 | -- Protect this procedure against wrong usage. Required because it will | |
8597 | -- be used directly from GDB | |
8598 | ||
17e14451 | 8599 | if not (Typ <= Last_Node_Id) |
aad6babd | 8600 | or else not Is_Tagged_Type (Typ) |
8601 | then | |
d62940bf | 8602 | Write_Str ("wrong usage: Write_DT must be used with tagged types"); |
aad6babd | 8603 | Write_Eol; |
8604 | return; | |
8605 | end if; | |
8606 | ||
8607 | Write_Int (Int (Typ)); | |
8608 | Write_Str (": "); | |
8609 | Write_Name (Chars (Typ)); | |
8610 | ||
8611 | if Is_Interface (Typ) then | |
8612 | Write_Str (" is interface"); | |
8613 | end if; | |
8614 | ||
8615 | Write_Eol; | |
8616 | ||
8617 | Elmt := First_Elmt (Primitive_Operations (Typ)); | |
8618 | while Present (Elmt) loop | |
8619 | Prim := Node (Elmt); | |
8620 | Write_Str (" - "); | |
8621 | ||
8622 | -- Indicate if this primitive will be allocated in the primary | |
8623 | -- dispatch table or in a secondary dispatch table associated | |
8624 | -- with an abstract interface type | |
8625 | ||
8626 | if Present (DTC_Entity (Prim)) then | |
8627 | if Etype (DTC_Entity (Prim)) = RTE (RE_Tag) then | |
8628 | Write_Str ("[P] "); | |
8629 | else | |
8630 | Write_Str ("[s] "); | |
8631 | end if; | |
8632 | end if; | |
8633 | ||
8634 | -- Output the node of this primitive operation and its name | |
8635 | ||
8636 | Write_Int (Int (Prim)); | |
8637 | Write_Str (": "); | |
68f95949 | 8638 | |
8639 | if Is_Predefined_Dispatching_Operation (Prim) then | |
8640 | Write_Str ("(predefined) "); | |
8641 | end if; | |
8642 | ||
b381b314 | 8643 | -- Prefix the name of the primitive with its corresponding tagged |
8644 | -- type to facilitate seeing inherited primitives. | |
8645 | ||
8646 | if Present (Alias (Prim)) then | |
8647 | Write_Name | |
8648 | (Chars (Find_Dispatching_Type (Ultimate_Alias (Prim)))); | |
8649 | else | |
8650 | Write_Name (Chars (Typ)); | |
8651 | end if; | |
8652 | ||
8653 | Write_Str ("."); | |
aad6babd | 8654 | Write_Name (Chars (Prim)); |
8655 | ||
8656 | -- Indicate if this primitive has an aliased primitive | |
8657 | ||
8658 | if Present (Alias (Prim)) then | |
8659 | Write_Str (" (alias = "); | |
8660 | Write_Int (Int (Alias (Prim))); | |
8661 | ||
8662 | -- If the DTC_Entity attribute is already set we can also output | |
4c58ddd7 | 8663 | -- the name of the interface covered by this primitive (if any). |
aad6babd | 8664 | |
f117057b | 8665 | if Ekind_In (Alias (Prim), E_Function, E_Procedure) |
8666 | and then Present (DTC_Entity (Alias (Prim))) | |
aad6babd | 8667 | and then Is_Interface (Scope (DTC_Entity (Alias (Prim)))) |
8668 | then | |
8669 | Write_Str (" from interface "); | |
8670 | Write_Name (Chars (Scope (DTC_Entity (Alias (Prim))))); | |
8671 | end if; | |
8672 | ||
a652dd51 | 8673 | if Present (Interface_Alias (Prim)) then |
aad6babd | 8674 | Write_Str (", AI_Alias of "); |
f235fede | 8675 | |
8676 | if Is_Null_Interface_Primitive (Interface_Alias (Prim)) then | |
8677 | Write_Str ("null primitive "); | |
8678 | end if; | |
8679 | ||
a652dd51 | 8680 | Write_Name |
8681 | (Chars (Find_Dispatching_Type (Interface_Alias (Prim)))); | |
aad6babd | 8682 | Write_Char (':'); |
a652dd51 | 8683 | Write_Int (Int (Interface_Alias (Prim))); |
aad6babd | 8684 | end if; |
8685 | ||
8686 | Write_Str (")"); | |
8687 | end if; | |
8688 | ||
8689 | -- Display the final position of this primitive in its associated | |
02a2406d | 8690 | -- (primary or secondary) dispatch table. |
aad6babd | 8691 | |
8692 | if Present (DTC_Entity (Prim)) | |
8693 | and then DT_Position (Prim) /= No_Uint | |
8694 | then | |
8695 | Write_Str (" at #"); | |
8696 | Write_Int (UI_To_Int (DT_Position (Prim))); | |
8697 | end if; | |
8698 | ||
343d35dc | 8699 | if Is_Abstract_Subprogram (Prim) then |
aad6babd | 8700 | Write_Str (" is abstract;"); |
af647dc7 | 8701 | |
8702 | -- Check if this is a null primitive | |
8703 | ||
8704 | elsif Comes_From_Source (Prim) | |
8705 | and then Ekind (Prim) = E_Procedure | |
8706 | and then Null_Present (Parent (Prim)) | |
8707 | then | |
8708 | Write_Str (" is null;"); | |
aad6babd | 8709 | end if; |
8710 | ||
555c63a6 | 8711 | if Is_Eliminated (Ultimate_Alias (Prim)) then |
8712 | Write_Str (" (eliminated)"); | |
8713 | end if; | |
8714 | ||
d00681a7 | 8715 | if Is_Imported (Prim) |
8716 | and then Convention (Prim) = Convention_CPP | |
8717 | then | |
8718 | Write_Str (" (C++)"); | |
8719 | end if; | |
8720 | ||
aad6babd | 8721 | Write_Eol; |
8722 | ||
8723 | Next_Elmt (Elmt); | |
8724 | end loop; | |
8725 | end Write_DT; | |
8726 | ||
ee6ba406 | 8727 | end Exp_Disp; |