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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 | ||
87110162 | 1342 | Opnd := Underlying_Record_Type (Opnd); |
1343 | ||
7e0d01bf | 1344 | if not Is_Interface (Opnd) |
1345 | and then Is_Ancestor (Iface_Typ, Opnd, Use_Full_View => True) | |
1346 | then | |
1347 | return; | |
1348 | end if; | |
87110162 | 1349 | |
1350 | -- When the type of the operand and the target interface type match, | |
1351 | -- it is generally safe to skip generating code to displace the | |
1352 | -- pointer to the object to reference the secondary dispatch table | |
1353 | -- associated with the target interface type. The exception to this | |
1354 | -- general rule is when the underlying object of the type conversion | |
1355 | -- is an object built by means of a dispatching constructor (since in | |
1356 | -- such case the expansion of the constructor call is a direct call | |
1357 | -- to an object primitive, i.e. without thunks, and the expansion of | |
1358 | -- the constructor call adds an explicit conversion to the target | |
1359 | -- interface type to force the displacement of the pointer to the | |
1360 | -- object to reference the corresponding secondary dispatch table | |
1361 | -- (cf. Make_DT and Expand_Dispatching_Constructor_Call)). | |
1362 | ||
1363 | -- At this stage we cannot identify whether the underlying object is | |
1364 | -- a BIP object and hence we cannot skip generating the code to try | |
1365 | -- displacing the pointer to the object. However, under configurable | |
1366 | -- runtime it is safe to skip generating code to displace the pointer | |
1367 | -- to the object, because generic dispatching constructors are not | |
1368 | -- supported. | |
1369 | ||
c6056dd1 | 1370 | if Opnd = Iface_Typ and then not RTE_Available (RE_Displace) then |
87110162 | 1371 | return; |
1372 | end if; | |
7e0d01bf | 1373 | end; |
1374 | ||
61ce7f9f | 1375 | -- Evaluate if we can statically displace the pointer to the object |
1376 | ||
1377 | declare | |
1378 | Opnd_Typ : constant Node_Id := Underlying_Record_Type (Operand_Typ); | |
1379 | ||
1380 | begin | |
1381 | Is_Static := | |
1382 | not Is_Interface (Opnd_Typ) | |
1383 | and then Interface_Present_In_Ancestor | |
1384 | (Typ => Opnd_Typ, | |
1385 | Iface => Iface_Typ) | |
1386 | and then (Etype (Opnd_Typ) = Opnd_Typ | |
1387 | or else not | |
1388 | Is_Variable_Size_Record (Etype (Opnd_Typ))); | |
1389 | end; | |
aad6babd | 1390 | |
662256db | 1391 | if not Tagged_Type_Expansion then |
725a69d2 | 1392 | return; |
aa0a69ab | 1393 | |
62c62e4b | 1394 | -- A static conversion to an interface type that is not class-wide is |
aa0a69ab | 1395 | -- curious but legal if the interface operation is a null procedure. |
1396 | -- If the operation is abstract it will be rejected later. | |
1397 | ||
1398 | elsif Is_Static | |
1399 | and then Is_Interface (Etype (N)) | |
1400 | and then not Is_Class_Wide_Type (Etype (N)) | |
1401 | and then Comes_From_Source (N) | |
1402 | then | |
1403 | Rewrite (N, Unchecked_Convert_To (Etype (N), N)); | |
1404 | Analyze (N); | |
1405 | return; | |
725a69d2 | 1406 | end if; |
1407 | ||
952af0b9 | 1408 | if not Is_Static then |
68f95949 | 1409 | |
62c62e4b | 1410 | -- Give error if configurable run-time and Displace not available |
68f95949 | 1411 | |
1412 | if not RTE_Available (RE_Displace) then | |
cc60bd16 | 1413 | Error_Msg_CRT ("dynamic interface conversion", N); |
68f95949 | 1414 | return; |
1415 | end if; | |
1416 | ||
725a69d2 | 1417 | -- Handle conversion of access-to-class-wide interface types. Target |
1418 | -- can be an access to an object or an access to another class-wide | |
1419 | -- interface (see -1- and -2- in the following example): | |
af647dc7 | 1420 | |
1421 | -- type Iface1_Ref is access all Iface1'Class; | |
1422 | -- type Iface2_Ref is access all Iface1'Class; | |
1423 | ||
1424 | -- Acc1 : Iface1_Ref := new ... | |
1425 | -- Obj : Obj_Ref := Obj_Ref (Acc); -- 1 | |
1426 | -- Acc2 : Iface2_Ref := Iface2_Ref (Acc); -- 2 | |
1427 | ||
1428 | if Is_Access_Type (Operand_Typ) then | |
af647dc7 | 1429 | Rewrite (N, |
1430 | Unchecked_Convert_To (Etype (N), | |
1431 | Make_Function_Call (Loc, | |
83c6c069 | 1432 | Name => New_Occurrence_Of (RTE (RE_Displace), Loc), |
af647dc7 | 1433 | Parameter_Associations => New_List ( |
1434 | ||
1435 | Unchecked_Convert_To (RTE (RE_Address), | |
1436 | Relocate_Node (Expression (N))), | |
1437 | ||
1438 | New_Occurrence_Of | |
1439 | (Node (First_Elmt (Access_Disp_Table (Iface_Typ))), | |
1440 | Loc))))); | |
1441 | ||
1442 | Analyze (N); | |
1443 | return; | |
1444 | end if; | |
1445 | ||
952af0b9 | 1446 | Rewrite (N, |
1447 | Make_Function_Call (Loc, | |
83c6c069 | 1448 | Name => New_Occurrence_Of (RTE (RE_Displace), Loc), |
952af0b9 | 1449 | Parameter_Associations => New_List ( |
1450 | Make_Attribute_Reference (Loc, | |
1451 | Prefix => Relocate_Node (Expression (N)), | |
1452 | Attribute_Name => Name_Address), | |
af647dc7 | 1453 | |
952af0b9 | 1454 | New_Occurrence_Of |
1455 | (Node (First_Elmt (Access_Disp_Table (Iface_Typ))), | |
1456 | Loc)))); | |
1457 | ||
1458 | Analyze (N); | |
1459 | ||
02a2406d | 1460 | -- If target is a class-wide interface, change the type of the data |
1461 | -- returned by IW_Convert to indicate this is a dispatching call. | |
952af0b9 | 1462 | |
17e14451 | 1463 | declare |
1464 | New_Itype : Entity_Id; | |
952af0b9 | 1465 | |
17e14451 | 1466 | begin |
1467 | New_Itype := Create_Itype (E_Anonymous_Access_Type, N); | |
cc60bd16 | 1468 | Set_Etype (New_Itype, New_Itype); |
17e14451 | 1469 | Set_Directly_Designated_Type (New_Itype, Etyp); |
952af0b9 | 1470 | |
17e14451 | 1471 | Rewrite (N, |
1472 | Make_Explicit_Dereference (Loc, | |
1473 | Prefix => | |
1474 | Unchecked_Convert_To (New_Itype, Relocate_Node (N)))); | |
1475 | Analyze (N); | |
1476 | Freeze_Itype (New_Itype, N); | |
1477 | ||
1478 | return; | |
1479 | end; | |
952af0b9 | 1480 | end if; |
1481 | ||
d62940bf | 1482 | Iface_Tag := Find_Interface_Tag (Operand_Typ, Iface_Typ); |
d86fe124 | 1483 | pragma Assert (Present (Iface_Tag)); |
aad6babd | 1484 | |
d62940bf | 1485 | -- Keep separate access types to interfaces because one internal |
f235fede | 1486 | -- function is used to handle the null value (see following comments) |
d62940bf | 1487 | |
1488 | if not Is_Access_Type (Etype (N)) then | |
f235fede | 1489 | |
02a2406d | 1490 | -- Statically displace the pointer to the object to reference the |
1491 | -- component containing the secondary dispatch table. | |
f235fede | 1492 | |
d62940bf | 1493 | Rewrite (N, |
f235fede | 1494 | Convert_Tag_To_Interface (Class_Wide_Type (Iface_Typ), |
d62940bf | 1495 | Make_Selected_Component (Loc, |
1496 | Prefix => Relocate_Node (Expression (N)), | |
f235fede | 1497 | Selector_Name => New_Occurrence_Of (Iface_Tag, Loc)))); |
d62940bf | 1498 | |
1499 | else | |
39a0c1d3 | 1500 | -- Build internal function to handle the case in which the actual is |
1501 | -- null. If the actual is null returns null because no displacement | |
1502 | -- is required; otherwise performs a type conversion that will be | |
1503 | -- expanded in the code that returns the value of the displaced | |
1504 | -- actual. That is: | |
d62940bf | 1505 | |
af647dc7 | 1506 | -- function Func (O : Address) return Iface_Typ is |
17e14451 | 1507 | -- type Op_Typ is access all Operand_Typ; |
1508 | -- Aux : Op_Typ := To_Op_Typ (O); | |
d62940bf | 1509 | -- begin |
af647dc7 | 1510 | -- if O = Null_Address then |
d62940bf | 1511 | -- return null; |
1512 | -- else | |
17e14451 | 1513 | -- return Iface_Typ!(Aux.Iface_Tag'Address); |
d62940bf | 1514 | -- end if; |
1515 | -- end Func; | |
1516 | ||
af647dc7 | 1517 | declare |
17e14451 | 1518 | Desig_Typ : Entity_Id; |
1519 | Fent : Entity_Id; | |
1520 | New_Typ_Decl : Node_Id; | |
17e14451 | 1521 | Stats : List_Id; |
1522 | ||
af647dc7 | 1523 | begin |
1524 | Desig_Typ := Etype (Expression (N)); | |
d62940bf | 1525 | |
af647dc7 | 1526 | if Is_Access_Type (Desig_Typ) then |
865909d3 | 1527 | Desig_Typ := |
1528 | Available_View (Directly_Designated_Type (Desig_Typ)); | |
af647dc7 | 1529 | end if; |
d62940bf | 1530 | |
e7e688dd | 1531 | if Is_Concurrent_Type (Desig_Typ) then |
1532 | Desig_Typ := Base_Type (Corresponding_Record_Type (Desig_Typ)); | |
1533 | end if; | |
1534 | ||
17e14451 | 1535 | New_Typ_Decl := |
1536 | Make_Full_Type_Declaration (Loc, | |
ec97ce79 | 1537 | Defining_Identifier => Make_Temporary (Loc, 'T'), |
17e14451 | 1538 | Type_Definition => |
1539 | Make_Access_To_Object_Definition (Loc, | |
1540 | All_Present => True, | |
1541 | Null_Exclusion_Present => False, | |
1542 | Constant_Present => False, | |
1543 | Subtype_Indication => | |
83c6c069 | 1544 | New_Occurrence_Of (Desig_Typ, Loc))); |
d62940bf | 1545 | |
725a69d2 | 1546 | Stats := New_List ( |
17e14451 | 1547 | Make_Simple_Return_Statement (Loc, |
1548 | Unchecked_Convert_To (Etype (N), | |
1549 | Make_Attribute_Reference (Loc, | |
02a2406d | 1550 | Prefix => |
17e14451 | 1551 | Make_Selected_Component (Loc, |
02a2406d | 1552 | Prefix => |
e7e688dd | 1553 | Unchecked_Convert_To |
1554 | (Defining_Identifier (New_Typ_Decl), | |
1555 | Make_Identifier (Loc, Name_uO)), | |
17e14451 | 1556 | Selector_Name => |
1557 | New_Occurrence_Of (Iface_Tag, Loc)), | |
1558 | Attribute_Name => Name_Address)))); | |
725a69d2 | 1559 | |
17e14451 | 1560 | -- If the type is null-excluding, no need for the null branch. |
1561 | -- Otherwise we need to check for it and return null. | |
1562 | ||
1563 | if not Can_Never_Be_Null (Etype (N)) then | |
1564 | Stats := New_List ( | |
1565 | Make_If_Statement (Loc, | |
1566 | Condition => | |
1567 | Make_Op_Eq (Loc, | |
1568 | Left_Opnd => Make_Identifier (Loc, Name_uO), | |
83c6c069 | 1569 | Right_Opnd => New_Occurrence_Of |
17e14451 | 1570 | (RTE (RE_Null_Address), Loc)), |
1571 | ||
1572 | Then_Statements => New_List ( | |
02a2406d | 1573 | Make_Simple_Return_Statement (Loc, Make_Null (Loc))), |
17e14451 | 1574 | Else_Statements => Stats)); |
1575 | end if; | |
d62940bf | 1576 | |
ec97ce79 | 1577 | Fent := Make_Temporary (Loc, 'F'); |
17e14451 | 1578 | Func := |
1579 | Make_Subprogram_Body (Loc, | |
1580 | Specification => | |
1581 | Make_Function_Specification (Loc, | |
1582 | Defining_Unit_Name => Fent, | |
d62940bf | 1583 | |
17e14451 | 1584 | Parameter_Specifications => New_List ( |
1585 | Make_Parameter_Specification (Loc, | |
1586 | Defining_Identifier => | |
1587 | Make_Defining_Identifier (Loc, Name_uO), | |
1588 | Parameter_Type => | |
83c6c069 | 1589 | New_Occurrence_Of (RTE (RE_Address), Loc))), |
d62940bf | 1590 | |
17e14451 | 1591 | Result_Definition => |
83c6c069 | 1592 | New_Occurrence_Of (Etype (N), Loc)), |
d62940bf | 1593 | |
e7e688dd | 1594 | Declarations => New_List (New_Typ_Decl), |
d62940bf | 1595 | |
17e14451 | 1596 | Handled_Statement_Sequence => |
1597 | Make_Handled_Sequence_Of_Statements (Loc, Stats)); | |
d62940bf | 1598 | |
17e14451 | 1599 | -- Place function body before the expression containing the |
1600 | -- conversion. We suppress all checks because the body of the | |
1601 | -- internally generated function already takes care of the case | |
1602 | -- in which the actual is null; therefore there is no need to | |
1603 | -- double check that the pointer is not null when the program | |
1604 | -- executes the alternative that performs the type conversion). | |
af647dc7 | 1605 | |
17e14451 | 1606 | Insert_Action (N, Func, Suppress => All_Checks); |
af647dc7 | 1607 | |
17e14451 | 1608 | if Is_Access_Type (Etype (Expression (N))) then |
af647dc7 | 1609 | |
e7e688dd | 1610 | -- Generate: Func (Address!(Expression)) |
af647dc7 | 1611 | |
17e14451 | 1612 | Rewrite (N, |
1613 | Make_Function_Call (Loc, | |
b29768cb | 1614 | Name => New_Occurrence_Of (Fent, Loc), |
17e14451 | 1615 | Parameter_Associations => New_List ( |
e7e688dd | 1616 | Unchecked_Convert_To (RTE (RE_Address), |
1617 | Relocate_Node (Expression (N)))))); | |
17e14451 | 1618 | |
1619 | else | |
e7e688dd | 1620 | -- Generate: Func (Operand_Typ!(Expression)'Address) |
17e14451 | 1621 | |
1622 | Rewrite (N, | |
1623 | Make_Function_Call (Loc, | |
b29768cb | 1624 | Name => New_Occurrence_Of (Fent, Loc), |
17e14451 | 1625 | Parameter_Associations => New_List ( |
1626 | Make_Attribute_Reference (Loc, | |
1627 | Prefix => Unchecked_Convert_To (Operand_Typ, | |
1628 | Relocate_Node (Expression (N))), | |
1629 | Attribute_Name => Name_Address)))); | |
1630 | end if; | |
1631 | end; | |
d62940bf | 1632 | end if; |
aad6babd | 1633 | |
1634 | Analyze (N); | |
1635 | end Expand_Interface_Conversion; | |
1636 | ||
1637 | ------------------------------ | |
1638 | -- Expand_Interface_Actuals -- | |
1639 | ------------------------------ | |
1640 | ||
1641 | procedure Expand_Interface_Actuals (Call_Node : Node_Id) is | |
aad6babd | 1642 | Actual : Node_Id; |
d62940bf | 1643 | Actual_Dup : Node_Id; |
aad6babd | 1644 | Actual_Typ : Entity_Id; |
d62940bf | 1645 | Anon : Entity_Id; |
aad6babd | 1646 | Conversion : Node_Id; |
1647 | Formal : Entity_Id; | |
1648 | Formal_Typ : Entity_Id; | |
1649 | Subp : Entity_Id; | |
95c577d7 | 1650 | Formal_DDT : Entity_Id := Empty; -- initialize to prevent warning |
1651 | Actual_DDT : Entity_Id := Empty; -- initialize to prevent warning | |
aad6babd | 1652 | |
1653 | begin | |
1654 | -- This subprogram is called directly from the semantics, so we need a | |
1655 | -- check to see whether expansion is active before proceeding. | |
1656 | ||
1657 | if not Expander_Active then | |
1658 | return; | |
1659 | end if; | |
1660 | ||
1661 | -- Call using access to subprogram with explicit dereference | |
1662 | ||
1663 | if Nkind (Name (Call_Node)) = N_Explicit_Dereference then | |
1664 | Subp := Etype (Name (Call_Node)); | |
1665 | ||
4e5db562 | 1666 | -- Call using selected component |
1667 | ||
1668 | elsif Nkind (Name (Call_Node)) = N_Selected_Component then | |
1669 | Subp := Entity (Selector_Name (Name (Call_Node))); | |
1670 | ||
1671 | -- Call using direct name | |
aad6babd | 1672 | |
1673 | else | |
1674 | Subp := Entity (Name (Call_Node)); | |
1675 | end if; | |
1676 | ||
725a69d2 | 1677 | -- Ada 2005 (AI-251): Look for interface type formals to force "this" |
1678 | -- displacement | |
1679 | ||
aad6babd | 1680 | Formal := First_Formal (Subp); |
1681 | Actual := First_Actual (Call_Node); | |
aad6babd | 1682 | while Present (Formal) loop |
725a69d2 | 1683 | Formal_Typ := Etype (Formal); |
d62940bf | 1684 | |
1685 | if Ekind (Formal_Typ) = E_Record_Type_With_Private then | |
1686 | Formal_Typ := Full_View (Formal_Typ); | |
1687 | end if; | |
1688 | ||
1689 | if Is_Access_Type (Formal_Typ) then | |
1690 | Formal_DDT := Directly_Designated_Type (Formal_Typ); | |
1691 | end if; | |
1692 | ||
aad6babd | 1693 | Actual_Typ := Etype (Actual); |
1694 | ||
d62940bf | 1695 | if Is_Access_Type (Actual_Typ) then |
1696 | Actual_DDT := Directly_Designated_Type (Actual_Typ); | |
1697 | end if; | |
1698 | ||
725a69d2 | 1699 | if Is_Interface (Formal_Typ) |
1700 | and then Is_Class_Wide_Type (Formal_Typ) | |
1701 | then | |
d62940bf | 1702 | -- No need to displace the pointer if the type of the actual |
1d00a8ce | 1703 | -- coincides with the type of the formal. |
aad6babd | 1704 | |
725a69d2 | 1705 | if Actual_Typ = Formal_Typ then |
d62940bf | 1706 | null; |
1707 | ||
02a2406d | 1708 | -- No need to displace the pointer if the interface type is a |
1709 | -- parent of the type of the actual because in this case the | |
725a69d2 | 1710 | -- interface primitives are located in the primary dispatch table. |
aad6babd | 1711 | |
cb4af01d | 1712 | elsif Is_Ancestor (Formal_Typ, Actual_Typ, |
1713 | Use_Full_View => True) | |
1714 | then | |
d62940bf | 1715 | null; |
1716 | ||
02a2406d | 1717 | -- Implicit conversion to the class-wide formal type to force the |
1718 | -- displacement of the pointer. | |
725a69d2 | 1719 | |
d62940bf | 1720 | else |
8a8d9086 | 1721 | -- Normally, expansion of actuals for calls to build-in-place |
1722 | -- functions happens as part of Expand_Actuals, but in this | |
1723 | -- case the call will be wrapped in a conversion and soon after | |
1724 | -- expanded further to handle the displacement for a class-wide | |
1725 | -- interface conversion, so if this is a BIP call then we need | |
1726 | -- to handle it now. | |
1727 | ||
cd24e497 | 1728 | if Is_Build_In_Place_Function_Call (Actual) then |
8a8d9086 | 1729 | Make_Build_In_Place_Call_In_Anonymous_Context (Actual); |
1730 | end if; | |
1731 | ||
d62940bf | 1732 | Conversion := Convert_To (Formal_Typ, Relocate_Node (Actual)); |
725a69d2 | 1733 | Rewrite (Actual, Conversion); |
d62940bf | 1734 | Analyze_And_Resolve (Actual, Formal_Typ); |
1735 | end if; | |
aad6babd | 1736 | |
725a69d2 | 1737 | -- Access to class-wide interface type |
aad6babd | 1738 | |
1739 | elsif Is_Access_Type (Formal_Typ) | |
725a69d2 | 1740 | and then Is_Interface (Formal_DDT) |
1741 | and then Is_Class_Wide_Type (Formal_DDT) | |
aad6babd | 1742 | and then Interface_Present_In_Ancestor |
d62940bf | 1743 | (Typ => Actual_DDT, |
1744 | Iface => Etype (Formal_DDT)) | |
aad6babd | 1745 | then |
725a69d2 | 1746 | -- Handle attributes 'Access and 'Unchecked_Access |
1747 | ||
aad6babd | 1748 | if Nkind (Actual) = N_Attribute_Reference |
1749 | and then | |
1750 | (Attribute_Name (Actual) = Name_Access | |
1751 | or else Attribute_Name (Actual) = Name_Unchecked_Access) | |
1752 | then | |
5e82d8fe | 1753 | -- This case must have been handled by the analysis and |
1754 | -- expansion of 'Access. The only exception is when types | |
1755 | -- match and no further expansion is required. | |
aad6babd | 1756 | |
5e82d8fe | 1757 | pragma Assert (Base_Type (Etype (Prefix (Actual))) |
1758 | = Base_Type (Formal_DDT)); | |
1759 | null; | |
aad6babd | 1760 | |
725a69d2 | 1761 | -- No need to displace the pointer if the type of the actual |
1762 | -- coincides with the type of the formal. | |
d62940bf | 1763 | |
725a69d2 | 1764 | elsif Actual_DDT = Formal_DDT then |
d62940bf | 1765 | null; |
1766 | ||
725a69d2 | 1767 | -- No need to displace the pointer if the interface type is |
1768 | -- a parent of the type of the actual because in this case the | |
1769 | -- interface primitives are located in the primary dispatch table. | |
d62940bf | 1770 | |
cb4af01d | 1771 | elsif Is_Ancestor (Formal_DDT, Actual_DDT, |
1772 | Use_Full_View => True) | |
1773 | then | |
d62940bf | 1774 | null; |
1775 | ||
aad6babd | 1776 | else |
d62940bf | 1777 | Actual_Dup := Relocate_Node (Actual); |
1778 | ||
4aa270d8 | 1779 | if From_Limited_With (Actual_Typ) then |
d62940bf | 1780 | |
9a666241 | 1781 | -- If the type of the actual parameter comes from a limited |
1782 | -- with_clause and the nonlimited view is already available, | |
1783 | -- we replace the anonymous access type by a duplicate | |
1784 | -- declaration whose designated type is the nonlimited view. | |
d62940bf | 1785 | |
40993cdb | 1786 | if Has_Non_Limited_View (Actual_DDT) then |
d62940bf | 1787 | Anon := New_Copy (Actual_Typ); |
1788 | ||
1789 | if Is_Itype (Anon) then | |
1790 | Set_Scope (Anon, Current_Scope); | |
1791 | end if; | |
1792 | ||
542823a9 | 1793 | Set_Directly_Designated_Type |
1794 | (Anon, Non_Limited_View (Actual_DDT)); | |
d62940bf | 1795 | Set_Etype (Actual_Dup, Anon); |
d62940bf | 1796 | end if; |
1797 | end if; | |
1798 | ||
1799 | Conversion := Convert_To (Formal_Typ, Actual_Dup); | |
1800 | Rewrite (Actual, Conversion); | |
aad6babd | 1801 | Analyze_And_Resolve (Actual, Formal_Typ); |
1802 | end if; | |
1803 | end if; | |
1804 | ||
1805 | Next_Actual (Actual); | |
1806 | Next_Formal (Formal); | |
1807 | end loop; | |
1808 | end Expand_Interface_Actuals; | |
1809 | ||
1810 | ---------------------------- | |
1811 | -- Expand_Interface_Thunk -- | |
1812 | ---------------------------- | |
1813 | ||
725a69d2 | 1814 | procedure Expand_Interface_Thunk |
17e14451 | 1815 | (Prim : Node_Id; |
1816 | Thunk_Id : out Entity_Id; | |
1817 | Thunk_Code : out Node_Id) | |
aad6babd | 1818 | is |
e8376947 | 1819 | Loc : constant Source_Ptr := Sloc (Prim); |
1820 | Actuals : constant List_Id := New_List; | |
1821 | Decl : constant List_Id := New_List; | |
1822 | Formals : constant List_Id := New_List; | |
1823 | Target : constant Entity_Id := Ultimate_Alias (Prim); | |
725a69d2 | 1824 | |
c6431a40 | 1825 | Decl_1 : Node_Id; |
1826 | Decl_2 : Node_Id; | |
1827 | Expr : Node_Id; | |
1828 | Formal : Node_Id; | |
1829 | Ftyp : Entity_Id; | |
95c577d7 | 1830 | Iface_Formal : Node_Id := Empty; -- initialize to prevent warning |
c6431a40 | 1831 | New_Arg : Node_Id; |
1832 | Offset_To_Top : Node_Id; | |
1833 | Target_Formal : Entity_Id; | |
aad6babd | 1834 | |
1835 | begin | |
725a69d2 | 1836 | Thunk_Id := Empty; |
1837 | Thunk_Code := Empty; | |
1838 | ||
3f8cf2d2 | 1839 | -- No thunk needed if the primitive has been eliminated |
1840 | ||
1841 | if Is_Eliminated (Ultimate_Alias (Prim)) then | |
1842 | return; | |
1843 | ||
e8376947 | 1844 | -- In case of primitives that are functions without formals and a |
1845 | -- controlling result there is no need to build the thunk. | |
725a69d2 | 1846 | |
3f8cf2d2 | 1847 | elsif not Present (First_Formal (Target)) then |
725a69d2 | 1848 | pragma Assert (Ekind (Target) = E_Function |
1849 | and then Has_Controlling_Result (Target)); | |
1850 | return; | |
1851 | end if; | |
1852 | ||
04c6d723 | 1853 | -- Duplicate the formals of the Target primitive. In the thunk, the type |
1854 | -- of the controlling formal is the covered interface type (instead of | |
1855 | -- the target tagged type). Done to avoid problems with discriminated | |
1856 | -- tagged types because, if the controlling type has discriminants with | |
e8376947 | 1857 | -- default values, then the type conversions done inside the body of |
1858 | -- the thunk (after the displacement of the pointer to the base of the | |
04c6d723 | 1859 | -- actual object) generate code that modify its contents. |
1860 | ||
1861 | -- Note: This special management is not done for predefined primitives | |
1862 | -- because??? | |
1863 | ||
1864 | if not Is_Predefined_Dispatching_Operation (Prim) then | |
1865 | Iface_Formal := First_Formal (Interface_Alias (Prim)); | |
1866 | end if; | |
aad6babd | 1867 | |
d62940bf | 1868 | Formal := First_Formal (Target); |
aad6babd | 1869 | while Present (Formal) loop |
04c6d723 | 1870 | Ftyp := Etype (Formal); |
1871 | ||
1872 | -- Use the interface type as the type of the controlling formal (see | |
e8376947 | 1873 | -- comment above). |
04c6d723 | 1874 | |
1875 | if not Is_Controlling_Formal (Formal) | |
1876 | or else Is_Predefined_Dispatching_Operation (Prim) | |
1877 | then | |
1878 | Ftyp := Etype (Formal); | |
1879 | Expr := New_Copy_Tree (Expression (Parent (Formal))); | |
1880 | else | |
1881 | Ftyp := Etype (Iface_Formal); | |
1882 | Expr := Empty; | |
1883 | end if; | |
1884 | ||
725a69d2 | 1885 | Append_To (Formals, |
1886 | Make_Parameter_Specification (Loc, | |
1887 | Defining_Identifier => | |
1888 | Make_Defining_Identifier (Sloc (Formal), | |
1889 | Chars => Chars (Formal)), | |
1890 | In_Present => In_Present (Parent (Formal)), | |
1891 | Out_Present => Out_Present (Parent (Formal)), | |
83c6c069 | 1892 | Parameter_Type => New_Occurrence_Of (Ftyp, Loc), |
04c6d723 | 1893 | Expression => Expr)); |
1894 | ||
1895 | if not Is_Predefined_Dispatching_Operation (Prim) then | |
1896 | Next_Formal (Iface_Formal); | |
1897 | end if; | |
d62940bf | 1898 | |
aad6babd | 1899 | Next_Formal (Formal); |
1900 | end loop; | |
1901 | ||
725a69d2 | 1902 | Target_Formal := First_Formal (Target); |
1903 | Formal := First (Formals); | |
1904 | while Present (Formal) loop | |
04c6d723 | 1905 | |
6cd460aa | 1906 | -- If the parent is a constrained discriminated type, then the |
1907 | -- primitive operation will have been defined on a first subtype. | |
1908 | -- For proper matching with controlling type, use base type. | |
04c6d723 | 1909 | |
1910 | if Ekind (Target_Formal) = E_In_Parameter | |
1911 | and then Ekind (Etype (Target_Formal)) = E_Anonymous_Access_Type | |
1912 | then | |
6cd460aa | 1913 | Ftyp := |
1914 | Base_Type (Directly_Designated_Type (Etype (Target_Formal))); | |
04c6d723 | 1915 | else |
ca12fde2 | 1916 | Ftyp := Base_Type (Etype (Target_Formal)); |
04c6d723 | 1917 | end if; |
1918 | ||
232a63ed | 1919 | -- For concurrent types, the relevant information is found in the |
1920 | -- Corresponding_Record_Type, rather than the type entity itself. | |
6cd460aa | 1921 | |
04c6d723 | 1922 | if Is_Concurrent_Type (Ftyp) then |
1923 | Ftyp := Corresponding_Record_Type (Ftyp); | |
1924 | end if; | |
1925 | ||
725a69d2 | 1926 | if Ekind (Target_Formal) = E_In_Parameter |
1927 | and then Ekind (Etype (Target_Formal)) = E_Anonymous_Access_Type | |
40cdae8b | 1928 | and then Is_Controlling_Formal (Target_Formal) |
725a69d2 | 1929 | then |
1930 | -- Generate: | |
17e14451 | 1931 | -- type T is access all <<type of the target formal>> |
1932 | -- S : Storage_Offset := Storage_Offset!(Formal) | |
4277e5bb | 1933 | -- + Offset_To_Top (address!(Formal)) |
725a69d2 | 1934 | |
1935 | Decl_2 := | |
1936 | Make_Full_Type_Declaration (Loc, | |
ec97ce79 | 1937 | Defining_Identifier => Make_Temporary (Loc, 'T'), |
725a69d2 | 1938 | Type_Definition => |
1939 | Make_Access_To_Object_Definition (Loc, | |
1940 | All_Present => True, | |
1941 | Null_Exclusion_Present => False, | |
1942 | Constant_Present => False, | |
1943 | Subtype_Indication => | |
83c6c069 | 1944 | New_Occurrence_Of (Ftyp, Loc))); |
725a69d2 | 1945 | |
cc60bd16 | 1946 | New_Arg := |
1947 | Unchecked_Convert_To (RTE (RE_Address), | |
83c6c069 | 1948 | New_Occurrence_Of (Defining_Identifier (Formal), Loc)); |
cc60bd16 | 1949 | |
1950 | if not RTE_Available (RE_Offset_To_Top) then | |
1951 | Offset_To_Top := | |
1952 | Build_Offset_To_Top (Loc, New_Arg); | |
1953 | else | |
1954 | Offset_To_Top := | |
1955 | Make_Function_Call (Loc, | |
83c6c069 | 1956 | Name => New_Occurrence_Of (RTE (RE_Offset_To_Top), Loc), |
cc60bd16 | 1957 | Parameter_Associations => New_List (New_Arg)); |
1958 | end if; | |
1959 | ||
725a69d2 | 1960 | Decl_1 := |
1961 | Make_Object_Declaration (Loc, | |
ec97ce79 | 1962 | Defining_Identifier => Make_Temporary (Loc, 'S'), |
725a69d2 | 1963 | Constant_Present => True, |
1964 | Object_Definition => | |
83c6c069 | 1965 | New_Occurrence_Of (RTE (RE_Storage_Offset), Loc), |
725a69d2 | 1966 | Expression => |
4277e5bb | 1967 | Make_Op_Add (Loc, |
725a69d2 | 1968 | Left_Opnd => |
1969 | Unchecked_Convert_To | |
1970 | (RTE (RE_Storage_Offset), | |
83c6c069 | 1971 | New_Occurrence_Of |
1972 | (Defining_Identifier (Formal), Loc)), | |
725a69d2 | 1973 | Right_Opnd => |
cc60bd16 | 1974 | Offset_To_Top)); |
725a69d2 | 1975 | |
1976 | Append_To (Decl, Decl_2); | |
1977 | Append_To (Decl, Decl_1); | |
1978 | ||
17e14451 | 1979 | -- Reference the new actual. Generate: |
1980 | -- T!(S) | |
725a69d2 | 1981 | |
1982 | Append_To (Actuals, | |
1983 | Unchecked_Convert_To | |
1984 | (Defining_Identifier (Decl_2), | |
83c6c069 | 1985 | New_Occurrence_Of (Defining_Identifier (Decl_1), Loc))); |
725a69d2 | 1986 | |
40cdae8b | 1987 | elsif Is_Controlling_Formal (Target_Formal) then |
aad6babd | 1988 | |
e8376947 | 1989 | -- Generate: |
17e14451 | 1990 | -- S1 : Storage_Offset := Storage_Offset!(Formal'Address) |
4277e5bb | 1991 | -- + Offset_To_Top (Formal'Address) |
17e14451 | 1992 | -- S2 : Addr_Ptr := Addr_Ptr!(S1) |
aad6babd | 1993 | |
cc60bd16 | 1994 | New_Arg := |
1995 | Make_Attribute_Reference (Loc, | |
1996 | Prefix => | |
83c6c069 | 1997 | New_Occurrence_Of (Defining_Identifier (Formal), Loc), |
cc60bd16 | 1998 | Attribute_Name => |
1999 | Name_Address); | |
2000 | ||
2001 | if not RTE_Available (RE_Offset_To_Top) then | |
2002 | Offset_To_Top := | |
2003 | Build_Offset_To_Top (Loc, New_Arg); | |
2004 | else | |
2005 | Offset_To_Top := | |
2006 | Make_Function_Call (Loc, | |
83c6c069 | 2007 | Name => New_Occurrence_Of (RTE (RE_Offset_To_Top), Loc), |
cc60bd16 | 2008 | Parameter_Associations => New_List (New_Arg)); |
2009 | end if; | |
2010 | ||
725a69d2 | 2011 | Decl_1 := |
2012 | Make_Object_Declaration (Loc, | |
ec97ce79 | 2013 | Defining_Identifier => Make_Temporary (Loc, 'S'), |
725a69d2 | 2014 | Constant_Present => True, |
2015 | Object_Definition => | |
83c6c069 | 2016 | New_Occurrence_Of (RTE (RE_Storage_Offset), Loc), |
725a69d2 | 2017 | Expression => |
4277e5bb | 2018 | Make_Op_Add (Loc, |
725a69d2 | 2019 | Left_Opnd => |
2020 | Unchecked_Convert_To | |
2021 | (RTE (RE_Storage_Offset), | |
2022 | Make_Attribute_Reference (Loc, | |
2023 | Prefix => | |
83c6c069 | 2024 | New_Occurrence_Of |
725a69d2 | 2025 | (Defining_Identifier (Formal), Loc), |
2026 | Attribute_Name => Name_Address)), | |
2027 | Right_Opnd => | |
cc60bd16 | 2028 | Offset_To_Top)); |
aad6babd | 2029 | |
725a69d2 | 2030 | Decl_2 := |
2031 | Make_Object_Declaration (Loc, | |
ec97ce79 | 2032 | Defining_Identifier => Make_Temporary (Loc, 'S'), |
2033 | Constant_Present => True, | |
2034 | Object_Definition => | |
83c6c069 | 2035 | New_Occurrence_Of (RTE (RE_Addr_Ptr), Loc), |
ec97ce79 | 2036 | Expression => |
725a69d2 | 2037 | Unchecked_Convert_To |
2038 | (RTE (RE_Addr_Ptr), | |
83c6c069 | 2039 | New_Occurrence_Of (Defining_Identifier (Decl_1), Loc))); |
aad6babd | 2040 | |
725a69d2 | 2041 | Append_To (Decl, Decl_1); |
2042 | Append_To (Decl, Decl_2); | |
952af0b9 | 2043 | |
ec97ce79 | 2044 | -- Reference the new actual, generate: |
17e14451 | 2045 | -- Target_Formal (S2.all) |
aad6babd | 2046 | |
725a69d2 | 2047 | Append_To (Actuals, |
04c6d723 | 2048 | Unchecked_Convert_To (Ftyp, |
725a69d2 | 2049 | Make_Explicit_Dereference (Loc, |
83c6c069 | 2050 | New_Occurrence_Of (Defining_Identifier (Decl_2), Loc)))); |
aad6babd | 2051 | |
984d005d | 2052 | -- Ensure proper matching of access types. Required to avoid |
2053 | -- reporting spurious errors. | |
2054 | ||
2055 | elsif Is_Access_Type (Etype (Target_Formal)) then | |
2056 | Append_To (Actuals, | |
2057 | Unchecked_Convert_To (Base_Type (Etype (Target_Formal)), | |
83c6c069 | 2058 | New_Occurrence_Of (Defining_Identifier (Formal), Loc))); |
984d005d | 2059 | |
725a69d2 | 2060 | -- No special management required for this actual |
aad6babd | 2061 | |
725a69d2 | 2062 | else |
2063 | Append_To (Actuals, | |
83c6c069 | 2064 | New_Occurrence_Of (Defining_Identifier (Formal), Loc)); |
725a69d2 | 2065 | end if; |
2066 | ||
2067 | Next_Formal (Target_Formal); | |
aad6babd | 2068 | Next (Formal); |
2069 | end loop; | |
2070 | ||
ec97ce79 | 2071 | Thunk_Id := Make_Temporary (Loc, 'T'); |
b1961352 | 2072 | Set_Ekind (Thunk_Id, Ekind (Prim)); |
e7e688dd | 2073 | Set_Is_Thunk (Thunk_Id); |
265200d0 | 2074 | Set_Convention (Thunk_Id, Convention (Prim)); |
d86fe124 | 2075 | Set_Needs_Debug_Info (Thunk_Id, Needs_Debug_Info (Target)); |
cdc5a761 | 2076 | Set_Thunk_Entity (Thunk_Id, Target); |
e7e688dd | 2077 | |
e8376947 | 2078 | -- Procedure case |
2079 | ||
d62940bf | 2080 | if Ekind (Target) = E_Procedure then |
725a69d2 | 2081 | Thunk_Code := |
aad6babd | 2082 | Make_Subprogram_Body (Loc, |
2083 | Specification => | |
2084 | Make_Procedure_Specification (Loc, | |
2085 | Defining_Unit_Name => Thunk_Id, | |
2086 | Parameter_Specifications => Formals), | |
2087 | Declarations => Decl, | |
2088 | Handled_Statement_Sequence => | |
2089 | Make_Handled_Sequence_Of_Statements (Loc, | |
2090 | Statements => New_List ( | |
2091 | Make_Procedure_Call_Statement (Loc, | |
725a69d2 | 2092 | Name => New_Occurrence_Of (Target, Loc), |
2093 | Parameter_Associations => Actuals)))); | |
aad6babd | 2094 | |
e8376947 | 2095 | -- Function case |
aad6babd | 2096 | |
e8376947 | 2097 | else pragma Assert (Ekind (Target) = E_Function); |
61ce7f9f | 2098 | declare |
2099 | Result_Def : Node_Id; | |
2100 | Call_Node : Node_Id; | |
2101 | ||
2102 | begin | |
2103 | Call_Node := | |
2104 | Make_Function_Call (Loc, | |
2105 | Name => New_Occurrence_Of (Target, Loc), | |
2106 | Parameter_Associations => Actuals); | |
2107 | ||
2108 | if not Is_Interface (Etype (Prim)) then | |
2109 | Result_Def := New_Copy (Result_Definition (Parent (Target))); | |
2110 | ||
2111 | -- Thunk of function returning a class-wide interface object. No | |
2112 | -- extra displacement needed since the displacement is generated | |
2113 | -- in the return statement of Prim. Example: | |
2114 | ||
2115 | -- type Iface is interface ... | |
2116 | -- function F (O : Iface) return Iface'Class; | |
2117 | ||
2118 | -- type T is new ... and Iface with ... | |
2119 | -- function F (O : T) return Iface'Class; | |
2120 | ||
2121 | elsif Is_Class_Wide_Type (Etype (Prim)) then | |
2122 | Result_Def := New_Occurrence_Of (Etype (Prim), Loc); | |
2123 | ||
2124 | -- Thunk of function returning an interface object. Displacement | |
2125 | -- needed. Example: | |
2126 | ||
2127 | -- type Iface is interface ... | |
2128 | -- function F (O : Iface) return Iface; | |
2129 | ||
2130 | -- type T is new ... and Iface with ... | |
2131 | -- function F (O : T) return T; | |
2132 | ||
2133 | else | |
2134 | Result_Def := | |
2135 | New_Occurrence_Of (Class_Wide_Type (Etype (Prim)), Loc); | |
2136 | ||
2137 | -- Adding implicit conversion to force the displacement of | |
2138 | -- the pointer to the object to reference the corresponding | |
2139 | -- secondary dispatch table. | |
2140 | ||
2141 | Call_Node := | |
2142 | Make_Type_Conversion (Loc, | |
2143 | Subtype_Mark => | |
2144 | New_Occurrence_Of (Class_Wide_Type (Etype (Prim)), Loc), | |
2145 | Expression => Relocate_Node (Call_Node)); | |
2146 | end if; | |
2147 | ||
2148 | Thunk_Code := | |
2149 | Make_Subprogram_Body (Loc, | |
02a2406d | 2150 | Specification => |
61ce7f9f | 2151 | Make_Function_Specification (Loc, |
2152 | Defining_Unit_Name => Thunk_Id, | |
2153 | Parameter_Specifications => Formals, | |
2154 | Result_Definition => Result_Def), | |
02a2406d | 2155 | Declarations => Decl, |
61ce7f9f | 2156 | Handled_Statement_Sequence => |
2157 | Make_Handled_Sequence_Of_Statements (Loc, | |
2158 | Statements => New_List ( | |
2159 | Make_Simple_Return_Statement (Loc, Call_Node)))); | |
2160 | end; | |
aad6babd | 2161 | end if; |
aad6babd | 2162 | end Expand_Interface_Thunk; |
2163 | ||
d00681a7 | 2164 | -------------------------- |
2165 | -- Has_CPP_Constructors -- | |
2166 | -------------------------- | |
2167 | ||
2168 | function Has_CPP_Constructors (Typ : Entity_Id) return Boolean is | |
2169 | E : Entity_Id; | |
2170 | ||
2171 | begin | |
2172 | -- Look for the constructor entities | |
2173 | ||
2174 | E := Next_Entity (Typ); | |
2175 | while Present (E) loop | |
02a2406d | 2176 | if Ekind (E) = E_Function and then Is_Constructor (E) then |
d00681a7 | 2177 | return True; |
2178 | end if; | |
2179 | ||
2180 | Next_Entity (E); | |
2181 | end loop; | |
2182 | ||
2183 | return False; | |
2184 | end Has_CPP_Constructors; | |
2185 | ||
24971415 | 2186 | ------------ |
2187 | -- Has_DT -- | |
2188 | ------------ | |
2189 | ||
2190 | function Has_DT (Typ : Entity_Id) return Boolean is | |
2191 | begin | |
2192 | return not Is_Interface (Typ) | |
02a2406d | 2193 | and then not Restriction_Active (No_Dispatching_Calls); |
24971415 | 2194 | end Has_DT; |
2195 | ||
687b5687 | 2196 | ---------------------------------- |
2197 | -- Is_Expanded_Dispatching_Call -- | |
2198 | ---------------------------------- | |
2199 | ||
2200 | function Is_Expanded_Dispatching_Call (N : Node_Id) return Boolean is | |
2201 | begin | |
2202 | return Nkind (N) in N_Subprogram_Call | |
2203 | and then Nkind (Name (N)) = N_Explicit_Dereference | |
2204 | and then Is_Dispatch_Table_Entity (Etype (Name (N))); | |
2205 | end Is_Expanded_Dispatching_Call; | |
2206 | ||
af647dc7 | 2207 | ------------------------------------- |
2208 | -- Is_Predefined_Dispatching_Alias -- | |
2209 | ------------------------------------- | |
2210 | ||
2211 | function Is_Predefined_Dispatching_Alias (Prim : Entity_Id) return Boolean | |
2212 | is | |
af647dc7 | 2213 | begin |
fc2907f6 | 2214 | return not Is_Predefined_Dispatching_Operation (Prim) |
af647dc7 | 2215 | and then Present (Alias (Prim)) |
fc2907f6 | 2216 | and then Is_Predefined_Dispatching_Operation (Ultimate_Alias (Prim)); |
af647dc7 | 2217 | end Is_Predefined_Dispatching_Alias; |
2218 | ||
76a1c25b | 2219 | ---------------------------------------- |
2220 | -- Make_Disp_Asynchronous_Select_Body -- | |
2221 | ---------------------------------------- | |
ee6ba406 | 2222 | |
cdb1c38f | 2223 | -- For interface types, generate: |
2224 | ||
2225 | -- procedure _Disp_Asynchronous_Select | |
2226 | -- (T : in out <Typ>; | |
2227 | -- S : Integer; | |
2228 | -- P : System.Address; | |
2229 | -- B : out System.Storage_Elements.Dummy_Communication_Block; | |
2230 | -- F : out Boolean) | |
2231 | -- is | |
2232 | -- begin | |
a053db0d | 2233 | -- F := False; |
2234 | -- C := Ada.Tags.POK_Function; | |
cdb1c38f | 2235 | -- end _Disp_Asynchronous_Select; |
2236 | ||
2237 | -- For protected types, generate: | |
2238 | ||
2239 | -- procedure _Disp_Asynchronous_Select | |
2240 | -- (T : in out <Typ>; | |
2241 | -- S : Integer; | |
2242 | -- P : System.Address; | |
2243 | -- B : out System.Storage_Elements.Dummy_Communication_Block; | |
2244 | -- F : out Boolean) | |
2245 | -- is | |
2246 | -- I : Integer := | |
2247 | -- Ada.Tags.Get_Entry_Index (Ada.Tags.Tag (<Typ>VP, S)); | |
2248 | -- Bnn : System.Tasking.Protected_Objects.Operations. | |
2249 | -- Communication_Block; | |
2250 | -- begin | |
2251 | -- System.Tasking.Protected_Objects.Operations.Protected_Entry_Call | |
2252 | -- (T._object'Access, | |
2253 | -- System.Tasking.Protected_Objects.Protected_Entry_Index (I), | |
2254 | -- P, | |
2255 | -- System.Tasking.Asynchronous_Call, | |
2256 | -- Bnn); | |
2257 | -- B := System.Storage_Elements.Dummy_Communication_Block (Bnn); | |
2258 | -- end _Disp_Asynchronous_Select; | |
2259 | ||
2260 | -- For task types, generate: | |
2261 | ||
2262 | -- procedure _Disp_Asynchronous_Select | |
2263 | -- (T : in out <Typ>; | |
2264 | -- S : Integer; | |
2265 | -- P : System.Address; | |
2266 | -- B : out System.Storage_Elements.Dummy_Communication_Block; | |
2267 | -- F : out Boolean) | |
2268 | -- is | |
2269 | -- I : Integer := | |
2270 | -- Ada.Tags.Get_Entry_Index (Ada.Tags.Tag (<Typ>VP, S)); | |
2271 | -- begin | |
2272 | -- System.Tasking.Rendezvous.Task_Entry_Call | |
2273 | -- (T._task_id, | |
2274 | -- System.Tasking.Task_Entry_Index (I), | |
2275 | -- P, | |
2276 | -- System.Tasking.Asynchronous_Call, | |
2277 | -- F); | |
2278 | -- end _Disp_Asynchronous_Select; | |
2279 | ||
76a1c25b | 2280 | function Make_Disp_Asynchronous_Select_Body |
2281 | (Typ : Entity_Id) return Node_Id | |
2282 | is | |
725a69d2 | 2283 | Com_Block : Entity_Id; |
2284 | Conc_Typ : Entity_Id := Empty; | |
2285 | Decls : constant List_Id := New_List; | |
725a69d2 | 2286 | Loc : constant Source_Ptr := Sloc (Typ); |
acf97c11 | 2287 | Obj_Ref : Node_Id; |
725a69d2 | 2288 | Stmts : constant List_Id := New_List; |
bf7f5966 | 2289 | Tag_Node : Node_Id; |
ee6ba406 | 2290 | |
2291 | begin | |
68f95949 | 2292 | pragma Assert (not Restriction_Active (No_Dispatching_Calls)); |
2293 | ||
952af0b9 | 2294 | -- Null body is generated for interface types |
2295 | ||
76a1c25b | 2296 | if Is_Interface (Typ) then |
2297 | return | |
2298 | Make_Subprogram_Body (Loc, | |
02a2406d | 2299 | Specification => |
2300 | Make_Disp_Asynchronous_Select_Spec (Typ), | |
2301 | Declarations => New_List, | |
76a1c25b | 2302 | Handled_Statement_Sequence => |
2303 | Make_Handled_Sequence_Of_Statements (Loc, | |
02a2406d | 2304 | New_List ( |
2305 | Make_Assignment_Statement (Loc, | |
2306 | Name => Make_Identifier (Loc, Name_uF), | |
2307 | Expression => New_Occurrence_Of (Standard_False, Loc))))); | |
9dfe12ae | 2308 | end if; |
2309 | ||
952af0b9 | 2310 | if Is_Concurrent_Record_Type (Typ) then |
2311 | Conc_Typ := Corresponding_Concurrent_Type (Typ); | |
aad6babd | 2312 | |
76a1c25b | 2313 | -- Generate: |
cdb1c38f | 2314 | -- I : Integer := |
2315 | -- Ada.Tags.Get_Entry_Index (Ada.Tags.Tag! (<type>VP), S); | |
aad6babd | 2316 | |
76a1c25b | 2317 | -- where I will be used to capture the entry index of the primitive |
2318 | -- wrapper at position S. | |
aad6babd | 2319 | |
bf7f5966 | 2320 | if Tagged_Type_Expansion then |
2321 | Tag_Node := | |
2322 | Unchecked_Convert_To (RTE (RE_Tag), | |
83c6c069 | 2323 | New_Occurrence_Of |
bf7f5966 | 2324 | (Node (First_Elmt (Access_Disp_Table (Typ))), Loc)); |
2325 | else | |
2326 | Tag_Node := | |
2327 | Make_Attribute_Reference (Loc, | |
02a2406d | 2328 | Prefix => New_Occurrence_Of (Typ, Loc), |
bf7f5966 | 2329 | Attribute_Name => Name_Tag); |
2330 | end if; | |
2331 | ||
76a1c25b | 2332 | Append_To (Decls, |
2333 | Make_Object_Declaration (Loc, | |
2334 | Defining_Identifier => | |
2335 | Make_Defining_Identifier (Loc, Name_uI), | |
02a2406d | 2336 | Object_Definition => |
83c6c069 | 2337 | New_Occurrence_Of (Standard_Integer, Loc), |
02a2406d | 2338 | Expression => |
725a69d2 | 2339 | Make_Function_Call (Loc, |
02a2406d | 2340 | Name => |
83c6c069 | 2341 | New_Occurrence_Of (RTE (RE_Get_Entry_Index), Loc), |
cdb1c38f | 2342 | Parameter_Associations => |
02a2406d | 2343 | New_List (Tag_Node, Make_Identifier (Loc, Name_uS))))); |
aad6babd | 2344 | |
76a1c25b | 2345 | if Ekind (Conc_Typ) = E_Protected_Type then |
aad6babd | 2346 | |
725a69d2 | 2347 | -- Generate: |
cdb1c38f | 2348 | -- Bnn : Communication_Block; |
725a69d2 | 2349 | |
ec97ce79 | 2350 | Com_Block := Make_Temporary (Loc, 'B'); |
725a69d2 | 2351 | Append_To (Decls, |
2352 | Make_Object_Declaration (Loc, | |
02a2406d | 2353 | Defining_Identifier => Com_Block, |
2354 | Object_Definition => | |
83c6c069 | 2355 | New_Occurrence_Of (RTE (RE_Communication_Block), Loc))); |
725a69d2 | 2356 | |
acf97c11 | 2357 | -- Build T._object'Access for calls below |
aad6babd | 2358 | |
acf97c11 | 2359 | Obj_Ref := |
2360 | Make_Attribute_Reference (Loc, | |
2361 | Attribute_Name => Name_Unchecked_Access, | |
2362 | Prefix => | |
2363 | Make_Selected_Component (Loc, | |
2364 | Prefix => Make_Identifier (Loc, Name_uT), | |
2365 | Selector_Name => Make_Identifier (Loc, Name_uObject))); | |
aad6babd | 2366 | |
acf97c11 | 2367 | case Corresponding_Runtime_Package (Conc_Typ) is |
2368 | when System_Tasking_Protected_Objects_Entries => | |
aad6babd | 2369 | |
acf97c11 | 2370 | -- Generate: |
2371 | -- Protected_Entry_Call | |
2372 | -- (T._object'Access, -- Object | |
2373 | -- Protected_Entry_Index! (I), -- E | |
2374 | -- P, -- Uninterpreted_Data | |
2375 | -- Asynchronous_Call, -- Mode | |
2376 | -- Bnn); -- Communication_Block | |
2377 | ||
2378 | -- where T is the protected object, I is the entry index, P | |
2379 | -- is the wrapped parameters and B is the name of the | |
2380 | -- communication block. | |
2381 | ||
2382 | Append_To (Stmts, | |
2383 | Make_Procedure_Call_Statement (Loc, | |
02a2406d | 2384 | Name => |
83c6c069 | 2385 | New_Occurrence_Of (RTE (RE_Protected_Entry_Call), Loc), |
acf97c11 | 2386 | Parameter_Associations => |
2387 | New_List ( | |
2388 | Obj_Ref, | |
aad6babd | 2389 | |
acf97c11 | 2390 | Make_Unchecked_Type_Conversion (Loc, -- entry index |
2391 | Subtype_Mark => | |
83c6c069 | 2392 | New_Occurrence_Of |
55868293 | 2393 | (RTE (RE_Protected_Entry_Index), Loc), |
acf97c11 | 2394 | Expression => Make_Identifier (Loc, Name_uI)), |
d62940bf | 2395 | |
acf97c11 | 2396 | Make_Identifier (Loc, Name_uP), -- parameter block |
83c6c069 | 2397 | New_Occurrence_Of -- Asynchronous_Call |
55868293 | 2398 | (RTE (RE_Asynchronous_Call), Loc), |
83c6c069 | 2399 | New_Occurrence_Of -- comm block |
2400 | (Com_Block, Loc)))); | |
acf97c11 | 2401 | |
acf97c11 | 2402 | when others => |
2403 | raise Program_Error; | |
2404 | end case; | |
725a69d2 | 2405 | |
2406 | -- Generate: | |
cdb1c38f | 2407 | -- B := Dummy_Communication_Block (Bnn); |
725a69d2 | 2408 | |
2409 | Append_To (Stmts, | |
2410 | Make_Assignment_Statement (Loc, | |
55868293 | 2411 | Name => Make_Identifier (Loc, Name_uB), |
725a69d2 | 2412 | Expression => |
2413 | Make_Unchecked_Type_Conversion (Loc, | |
2414 | Subtype_Mark => | |
02a2406d | 2415 | New_Occurrence_Of |
2416 | (RTE (RE_Dummy_Communication_Block), Loc), | |
2417 | Expression => New_Occurrence_Of (Com_Block, Loc)))); | |
725a69d2 | 2418 | |
a053db0d | 2419 | -- Generate: |
2420 | -- F := False; | |
2421 | ||
2422 | Append_To (Stmts, | |
2423 | Make_Assignment_Statement (Loc, | |
aabafdc2 | 2424 | Name => Make_Identifier (Loc, Name_uF), |
83c6c069 | 2425 | Expression => New_Occurrence_Of (Standard_False, Loc))); |
a053db0d | 2426 | |
76a1c25b | 2427 | else |
2428 | pragma Assert (Ekind (Conc_Typ) = E_Task_Type); | |
d62940bf | 2429 | |
76a1c25b | 2430 | -- Generate: |
cdb1c38f | 2431 | -- Task_Entry_Call |
2432 | -- (T._task_id, -- Acceptor | |
2433 | -- Task_Entry_Index! (I), -- E | |
2434 | -- P, -- Uninterpreted_Data | |
2435 | -- Asynchronous_Call, -- Mode | |
2436 | -- F); -- Rendezvous_Successful | |
ee6ba406 | 2437 | |
acf97c11 | 2438 | -- where T is the task object, I is the entry index, P is the |
76a1c25b | 2439 | -- wrapped parameters and F is the status flag. |
ee6ba406 | 2440 | |
76a1c25b | 2441 | Append_To (Stmts, |
2442 | Make_Procedure_Call_Statement (Loc, | |
02a2406d | 2443 | Name => |
83c6c069 | 2444 | New_Occurrence_Of (RTE (RE_Task_Entry_Call), Loc), |
76a1c25b | 2445 | Parameter_Associations => |
2446 | New_List ( | |
76a1c25b | 2447 | Make_Selected_Component (Loc, -- T._task_id |
55868293 | 2448 | Prefix => Make_Identifier (Loc, Name_uT), |
2449 | Selector_Name => Make_Identifier (Loc, Name_uTask_Id)), | |
ee6ba406 | 2450 | |
76a1c25b | 2451 | Make_Unchecked_Type_Conversion (Loc, -- entry index |
2452 | Subtype_Mark => | |
83c6c069 | 2453 | New_Occurrence_Of (RTE (RE_Task_Entry_Index), Loc), |
02a2406d | 2454 | Expression => Make_Identifier (Loc, Name_uI)), |
ee6ba406 | 2455 | |
76a1c25b | 2456 | Make_Identifier (Loc, Name_uP), -- parameter block |
83c6c069 | 2457 | New_Occurrence_Of -- Asynchronous_Call |
55868293 | 2458 | (RTE (RE_Asynchronous_Call), Loc), |
76a1c25b | 2459 | Make_Identifier (Loc, Name_uF)))); -- status flag |
2460 | end if; | |
7c949aad | 2461 | |
2462 | else | |
2463 | -- Ensure that the statements list is non-empty | |
2464 | ||
a053db0d | 2465 | Append_To (Stmts, |
2466 | Make_Assignment_Statement (Loc, | |
aabafdc2 | 2467 | Name => Make_Identifier (Loc, Name_uF), |
83c6c069 | 2468 | Expression => New_Occurrence_Of (Standard_False, Loc))); |
76a1c25b | 2469 | end if; |
ee6ba406 | 2470 | |
76a1c25b | 2471 | return |
2472 | Make_Subprogram_Body (Loc, | |
aabafdc2 | 2473 | Specification => |
76a1c25b | 2474 | Make_Disp_Asynchronous_Select_Spec (Typ), |
aabafdc2 | 2475 | Declarations => Decls, |
76a1c25b | 2476 | Handled_Statement_Sequence => |
2477 | Make_Handled_Sequence_Of_Statements (Loc, Stmts)); | |
2478 | end Make_Disp_Asynchronous_Select_Body; | |
ee6ba406 | 2479 | |
76a1c25b | 2480 | ---------------------------------------- |
2481 | -- Make_Disp_Asynchronous_Select_Spec -- | |
2482 | ---------------------------------------- | |
ee6ba406 | 2483 | |
76a1c25b | 2484 | function Make_Disp_Asynchronous_Select_Spec |
2485 | (Typ : Entity_Id) return Node_Id | |
2486 | is | |
2487 | Loc : constant Source_Ptr := Sloc (Typ); | |
c6056dd1 | 2488 | B_Id : constant Entity_Id := Make_Defining_Identifier (Loc, Name_uB); |
2489 | Def_Id : constant Entity_Id := | |
76a1c25b | 2490 | Make_Defining_Identifier (Loc, |
2491 | Name_uDisp_Asynchronous_Select); | |
2492 | Params : constant List_Id := New_List; | |
ee6ba406 | 2493 | |
76a1c25b | 2494 | begin |
68f95949 | 2495 | pragma Assert (not Restriction_Active (No_Dispatching_Calls)); |
2496 | ||
725a69d2 | 2497 | -- T : in out Typ; -- Object parameter |
2498 | -- S : Integer; -- Primitive operation slot | |
2499 | -- P : Address; -- Wrapped parameters | |
2500 | -- B : out Dummy_Communication_Block; -- Communication block dummy | |
2501 | -- F : out Boolean; -- Status flag | |
ee6ba406 | 2502 | |
c6183af9 | 2503 | -- The B parameter may be left uninitialized |
c6056dd1 | 2504 | |
c6183af9 | 2505 | Set_Warnings_Off (B_Id); |
2506 | ||
725a69d2 | 2507 | Append_List_To (Params, New_List ( |
2508 | ||
2509 | Make_Parameter_Specification (Loc, | |
02a2406d | 2510 | Defining_Identifier => Make_Defining_Identifier (Loc, Name_uT), |
2511 | Parameter_Type => New_Occurrence_Of (Typ, Loc), | |
2512 | In_Present => True, | |
2513 | Out_Present => True), | |
725a69d2 | 2514 | |
2515 | Make_Parameter_Specification (Loc, | |
02a2406d | 2516 | Defining_Identifier => Make_Defining_Identifier (Loc, Name_uS), |
2517 | Parameter_Type => New_Occurrence_Of (Standard_Integer, Loc)), | |
725a69d2 | 2518 | |
2519 | Make_Parameter_Specification (Loc, | |
02a2406d | 2520 | Defining_Identifier => Make_Defining_Identifier (Loc, Name_uP), |
2521 | Parameter_Type => New_Occurrence_Of (RTE (RE_Address), Loc)), | |
725a69d2 | 2522 | |
2523 | Make_Parameter_Specification (Loc, | |
c6183af9 | 2524 | Defining_Identifier => B_Id, |
02a2406d | 2525 | Parameter_Type => |
83c6c069 | 2526 | New_Occurrence_Of (RTE (RE_Dummy_Communication_Block), Loc), |
02a2406d | 2527 | Out_Present => True), |
ee6ba406 | 2528 | |
725a69d2 | 2529 | Make_Parameter_Specification (Loc, |
02a2406d | 2530 | Defining_Identifier => Make_Defining_Identifier (Loc, Name_uF), |
2531 | Parameter_Type => New_Occurrence_Of (Standard_Boolean, Loc), | |
2532 | Out_Present => True))); | |
7189d17f | 2533 | |
76a1c25b | 2534 | return |
725a69d2 | 2535 | Make_Procedure_Specification (Loc, |
2536 | Defining_Unit_Name => Def_Id, | |
2537 | Parameter_Specifications => Params); | |
76a1c25b | 2538 | end Make_Disp_Asynchronous_Select_Spec; |
ee6ba406 | 2539 | |
76a1c25b | 2540 | --------------------------------------- |
2541 | -- Make_Disp_Conditional_Select_Body -- | |
2542 | --------------------------------------- | |
ee6ba406 | 2543 | |
cdb1c38f | 2544 | -- For interface types, generate: |
2545 | ||
2546 | -- procedure _Disp_Conditional_Select | |
2547 | -- (T : in out <Typ>; | |
2548 | -- S : Integer; | |
2549 | -- P : System.Address; | |
2550 | -- C : out Ada.Tags.Prim_Op_Kind; | |
2551 | -- F : out Boolean) | |
2552 | -- is | |
2553 | -- begin | |
a053db0d | 2554 | -- F := False; |
2555 | -- C := Ada.Tags.POK_Function; | |
cdb1c38f | 2556 | -- end _Disp_Conditional_Select; |
2557 | ||
2558 | -- For protected types, generate: | |
2559 | ||
2560 | -- procedure _Disp_Conditional_Select | |
2561 | -- (T : in out <Typ>; | |
2562 | -- S : Integer; | |
2563 | -- P : System.Address; | |
2564 | -- C : out Ada.Tags.Prim_Op_Kind; | |
2565 | -- F : out Boolean) | |
2566 | -- is | |
2567 | -- I : Integer; | |
2568 | -- Bnn : System.Tasking.Protected_Objects.Operations. | |
2569 | -- Communication_Block; | |
2570 | ||
2571 | -- begin | |
2572 | -- C := Ada.Tags.Get_Prim_Op_Kind (Ada.Tags.Tag (<Typ>VP, S)); | |
2573 | ||
2574 | -- if C = Ada.Tags.POK_Procedure | |
2575 | -- or else C = Ada.Tags.POK_Protected_Procedure | |
2576 | -- or else C = Ada.Tags.POK_Task_Procedure | |
2577 | -- then | |
2578 | -- F := True; | |
2579 | -- return; | |
2580 | -- end if; | |
2581 | ||
2582 | -- I := Ada.Tags.Get_Entry_Index (Ada.Tags.Tag (<Typ>VP, S)); | |
2583 | -- System.Tasking.Protected_Objects.Operations.Protected_Entry_Call | |
2584 | -- (T.object'Access, | |
2585 | -- System.Tasking.Protected_Objects.Protected_Entry_Index (I), | |
2586 | -- P, | |
2587 | -- System.Tasking.Conditional_Call, | |
2588 | -- Bnn); | |
2589 | -- F := not Cancelled (Bnn); | |
2590 | -- end _Disp_Conditional_Select; | |
2591 | ||
2592 | -- For task types, generate: | |
2593 | ||
2594 | -- procedure _Disp_Conditional_Select | |
2595 | -- (T : in out <Typ>; | |
2596 | -- S : Integer; | |
2597 | -- P : System.Address; | |
2598 | -- C : out Ada.Tags.Prim_Op_Kind; | |
2599 | -- F : out Boolean) | |
2600 | -- is | |
2601 | -- I : Integer; | |
2602 | ||
2603 | -- begin | |
2604 | -- I := Ada.Tags.Get_Entry_Index (Ada.Tags.Tag (<Typ>VP, S)); | |
2605 | -- System.Tasking.Rendezvous.Task_Entry_Call | |
2606 | -- (T._task_id, | |
2607 | -- System.Tasking.Task_Entry_Index (I), | |
2608 | -- P, | |
2609 | -- System.Tasking.Conditional_Call, | |
2610 | -- F); | |
2611 | -- end _Disp_Conditional_Select; | |
2612 | ||
76a1c25b | 2613 | function Make_Disp_Conditional_Select_Body |
2614 | (Typ : Entity_Id) return Node_Id | |
2615 | is | |
2616 | Loc : constant Source_Ptr := Sloc (Typ); | |
2617 | Blk_Nam : Entity_Id; | |
2618 | Conc_Typ : Entity_Id := Empty; | |
2619 | Decls : constant List_Id := New_List; | |
acf97c11 | 2620 | Obj_Ref : Node_Id; |
76a1c25b | 2621 | Stmts : constant List_Id := New_List; |
bf7f5966 | 2622 | Tag_Node : Node_Id; |
ee6ba406 | 2623 | |
76a1c25b | 2624 | begin |
68f95949 | 2625 | pragma Assert (not Restriction_Active (No_Dispatching_Calls)); |
2626 | ||
952af0b9 | 2627 | -- Null body is generated for interface types |
2628 | ||
76a1c25b | 2629 | if Is_Interface (Typ) then |
2630 | return | |
2631 | Make_Subprogram_Body (Loc, | |
02a2406d | 2632 | Specification => |
76a1c25b | 2633 | Make_Disp_Conditional_Select_Spec (Typ), |
02a2406d | 2634 | Declarations => No_List, |
76a1c25b | 2635 | Handled_Statement_Sequence => |
2636 | Make_Handled_Sequence_Of_Statements (Loc, | |
a053db0d | 2637 | New_List (Make_Assignment_Statement (Loc, |
aabafdc2 | 2638 | Name => Make_Identifier (Loc, Name_uF), |
83c6c069 | 2639 | Expression => New_Occurrence_Of (Standard_False, Loc))))); |
76a1c25b | 2640 | end if; |
ee6ba406 | 2641 | |
952af0b9 | 2642 | if Is_Concurrent_Record_Type (Typ) then |
2643 | Conc_Typ := Corresponding_Concurrent_Type (Typ); | |
ee6ba406 | 2644 | |
76a1c25b | 2645 | -- Generate: |
2646 | -- I : Integer; | |
ee6ba406 | 2647 | |
76a1c25b | 2648 | -- where I will be used to capture the entry index of the primitive |
2649 | -- wrapper at position S. | |
ee6ba406 | 2650 | |
76a1c25b | 2651 | Append_To (Decls, |
2652 | Make_Object_Declaration (Loc, | |
02a2406d | 2653 | Defining_Identifier => Make_Defining_Identifier (Loc, Name_uI), |
2654 | Object_Definition => | |
83c6c069 | 2655 | New_Occurrence_Of (Standard_Integer, Loc))); |
ee6ba406 | 2656 | |
952af0b9 | 2657 | -- Generate: |
cdb1c38f | 2658 | -- C := Ada.Tags.Get_Prim_Op_Kind (Ada.Tags.Tag! (<type>VP), S); |
ee6ba406 | 2659 | |
952af0b9 | 2660 | -- if C = POK_Procedure |
2661 | -- or else C = POK_Protected_Procedure | |
2662 | -- or else C = POK_Task_Procedure; | |
2663 | -- then | |
2664 | -- F := True; | |
2665 | -- return; | |
2666 | -- end if; | |
aad6babd | 2667 | |
e58ae6f1 | 2668 | Build_Common_Dispatching_Select_Statements (Typ, Stmts); |
aad6babd | 2669 | |
76a1c25b | 2670 | -- Generate: |
2671 | -- Bnn : Communication_Block; | |
aad6babd | 2672 | |
cdb1c38f | 2673 | -- where Bnn is the name of the communication block used in the |
2674 | -- call to Protected_Entry_Call. | |
aad6babd | 2675 | |
ec97ce79 | 2676 | Blk_Nam := Make_Temporary (Loc, 'B'); |
76a1c25b | 2677 | Append_To (Decls, |
2678 | Make_Object_Declaration (Loc, | |
02a2406d | 2679 | Defining_Identifier => Blk_Nam, |
2680 | Object_Definition => | |
83c6c069 | 2681 | New_Occurrence_Of (RTE (RE_Communication_Block), Loc))); |
aad6babd | 2682 | |
76a1c25b | 2683 | -- Generate: |
cdb1c38f | 2684 | -- I := Ada.Tags.Get_Entry_Index (Ada.Tags.Tag! (<type>VP), S); |
aad6babd | 2685 | |
76a1c25b | 2686 | -- I is the entry index and S is the dispatch table slot |
aad6babd | 2687 | |
bf7f5966 | 2688 | if Tagged_Type_Expansion then |
2689 | Tag_Node := | |
2690 | Unchecked_Convert_To (RTE (RE_Tag), | |
83c6c069 | 2691 | New_Occurrence_Of |
bf7f5966 | 2692 | (Node (First_Elmt (Access_Disp_Table (Typ))), Loc)); |
2693 | ||
2694 | else | |
2695 | Tag_Node := | |
2696 | Make_Attribute_Reference (Loc, | |
02a2406d | 2697 | Prefix => New_Occurrence_Of (Typ, Loc), |
bf7f5966 | 2698 | Attribute_Name => Name_Tag); |
2699 | end if; | |
2700 | ||
76a1c25b | 2701 | Append_To (Stmts, |
2702 | Make_Assignment_Statement (Loc, | |
02a2406d | 2703 | Name => Make_Identifier (Loc, Name_uI), |
76a1c25b | 2704 | Expression => |
725a69d2 | 2705 | Make_Function_Call (Loc, |
02a2406d | 2706 | Name => |
83c6c069 | 2707 | New_Occurrence_Of (RTE (RE_Get_Entry_Index), Loc), |
02a2406d | 2708 | Parameter_Associations => New_List ( |
2709 | Tag_Node, | |
2710 | Make_Identifier (Loc, Name_uS))))); | |
ee6ba406 | 2711 | |
76a1c25b | 2712 | if Ekind (Conc_Typ) = E_Protected_Type then |
ee6ba406 | 2713 | |
acf97c11 | 2714 | Obj_Ref := -- T._object'Access |
2715 | Make_Attribute_Reference (Loc, | |
2716 | Attribute_Name => Name_Unchecked_Access, | |
2717 | Prefix => | |
2718 | Make_Selected_Component (Loc, | |
2719 | Prefix => Make_Identifier (Loc, Name_uT), | |
2720 | Selector_Name => Make_Identifier (Loc, Name_uObject))); | |
ee6ba406 | 2721 | |
acf97c11 | 2722 | case Corresponding_Runtime_Package (Conc_Typ) is |
2723 | when System_Tasking_Protected_Objects_Entries => | |
2724 | -- Generate: | |
e1c20931 | 2725 | |
acf97c11 | 2726 | -- Protected_Entry_Call |
2727 | -- (T._object'Access, -- Object | |
2728 | -- Protected_Entry_Index! (I), -- E | |
2729 | -- P, -- Uninterpreted_Data | |
2730 | -- Conditional_Call, -- Mode | |
2731 | -- Bnn); -- Block | |
e1c20931 | 2732 | |
acf97c11 | 2733 | -- where T is the protected object, I is the entry index, P |
2734 | -- are the wrapped parameters and Bnn is the name of the | |
2735 | -- communication block. | |
d62940bf | 2736 | |
acf97c11 | 2737 | Append_To (Stmts, |
2738 | Make_Procedure_Call_Statement (Loc, | |
02a2406d | 2739 | Name => |
83c6c069 | 2740 | New_Occurrence_Of (RTE (RE_Protected_Entry_Call), Loc), |
02a2406d | 2741 | Parameter_Associations => New_List ( |
acf97c11 | 2742 | Obj_Ref, |
d62940bf | 2743 | |
acf97c11 | 2744 | Make_Unchecked_Type_Conversion (Loc, -- entry index |
2745 | Subtype_Mark => | |
83c6c069 | 2746 | New_Occurrence_Of |
acf97c11 | 2747 | (RTE (RE_Protected_Entry_Index), Loc), |
2748 | Expression => Make_Identifier (Loc, Name_uI)), | |
2749 | ||
2750 | Make_Identifier (Loc, Name_uP), -- parameter block | |
2751 | ||
83c6c069 | 2752 | New_Occurrence_Of -- Conditional_Call |
2753 | (RTE (RE_Conditional_Call), Loc), | |
2754 | New_Occurrence_Of -- Bnn | |
2755 | (Blk_Nam, Loc)))); | |
acf97c11 | 2756 | |
2757 | when System_Tasking_Protected_Objects_Single_Entry => | |
2758 | ||
2759 | -- If we are compiling for a restricted run-time, the call | |
2760 | -- uses the simpler form. | |
2761 | ||
2762 | Append_To (Stmts, | |
2763 | Make_Procedure_Call_Statement (Loc, | |
02a2406d | 2764 | Name => |
83c6c069 | 2765 | New_Occurrence_Of |
acf97c11 | 2766 | (RTE (RE_Protected_Single_Entry_Call), Loc), |
02a2406d | 2767 | Parameter_Associations => New_List ( |
acf97c11 | 2768 | Obj_Ref, |
2769 | ||
2770 | Make_Attribute_Reference (Loc, | |
55868293 | 2771 | Prefix => Make_Identifier (Loc, Name_uP), |
acf97c11 | 2772 | Attribute_Name => Name_Address), |
2773 | ||
83c6c069 | 2774 | New_Occurrence_Of |
acf97c11 | 2775 | (RTE (RE_Conditional_Call), Loc)))); |
2776 | when others => | |
2777 | raise Program_Error; | |
2778 | end case; | |
d62940bf | 2779 | |
76a1c25b | 2780 | -- Generate: |
2781 | -- F := not Cancelled (Bnn); | |
e1c20931 | 2782 | |
76a1c25b | 2783 | -- where F is the success flag. The status of Cancelled is negated |
67cf9b55 | 2784 | -- in order to match the behavior of the version for task types. |
e1c20931 | 2785 | |
76a1c25b | 2786 | Append_To (Stmts, |
2787 | Make_Assignment_Statement (Loc, | |
55868293 | 2788 | Name => Make_Identifier (Loc, Name_uF), |
76a1c25b | 2789 | Expression => |
2790 | Make_Op_Not (Loc, | |
2791 | Right_Opnd => | |
2792 | Make_Function_Call (Loc, | |
02a2406d | 2793 | Name => |
83c6c069 | 2794 | New_Occurrence_Of (RTE (RE_Cancelled), Loc), |
02a2406d | 2795 | Parameter_Associations => New_List ( |
83c6c069 | 2796 | New_Occurrence_Of (Blk_Nam, Loc)))))); |
76a1c25b | 2797 | else |
2798 | pragma Assert (Ekind (Conc_Typ) = E_Task_Type); | |
d62940bf | 2799 | |
76a1c25b | 2800 | -- Generate: |
cdb1c38f | 2801 | -- Task_Entry_Call |
2802 | -- (T._task_id, -- Acceptor | |
2803 | -- Task_Entry_Index! (I), -- E | |
2804 | -- P, -- Uninterpreted_Data | |
2805 | -- Conditional_Call, -- Mode | |
2806 | -- F); -- Rendezvous_Successful | |
d62940bf | 2807 | |
76a1c25b | 2808 | -- where T is the task object, I is the entry index, P are the |
2809 | -- wrapped parameters and F is the status flag. | |
e1c20931 | 2810 | |
76a1c25b | 2811 | Append_To (Stmts, |
2812 | Make_Procedure_Call_Statement (Loc, | |
02a2406d | 2813 | Name => |
83c6c069 | 2814 | New_Occurrence_Of (RTE (RE_Task_Entry_Call), Loc), |
02a2406d | 2815 | Parameter_Associations => New_List ( |
76a1c25b | 2816 | |
2817 | Make_Selected_Component (Loc, -- T._task_id | |
55868293 | 2818 | Prefix => Make_Identifier (Loc, Name_uT), |
2819 | Selector_Name => Make_Identifier (Loc, Name_uTask_Id)), | |
76a1c25b | 2820 | |
2821 | Make_Unchecked_Type_Conversion (Loc, -- entry index | |
2822 | Subtype_Mark => | |
83c6c069 | 2823 | New_Occurrence_Of (RTE (RE_Task_Entry_Index), Loc), |
55868293 | 2824 | Expression => Make_Identifier (Loc, Name_uI)), |
76a1c25b | 2825 | |
2826 | Make_Identifier (Loc, Name_uP), -- parameter block | |
83c6c069 | 2827 | New_Occurrence_Of -- Conditional_Call |
55868293 | 2828 | (RTE (RE_Conditional_Call), Loc), |
76a1c25b | 2829 | Make_Identifier (Loc, Name_uF)))); -- status flag |
d62940bf | 2830 | end if; |
7c949aad | 2831 | |
2832 | else | |
a053db0d | 2833 | -- Initialize out parameters |
7c949aad | 2834 | |
a053db0d | 2835 | Append_To (Stmts, |
2836 | Make_Assignment_Statement (Loc, | |
aabafdc2 | 2837 | Name => Make_Identifier (Loc, Name_uF), |
83c6c069 | 2838 | Expression => New_Occurrence_Of (Standard_False, Loc))); |
a053db0d | 2839 | Append_To (Stmts, |
2840 | Make_Assignment_Statement (Loc, | |
aabafdc2 | 2841 | Name => Make_Identifier (Loc, Name_uC), |
83c6c069 | 2842 | Expression => New_Occurrence_Of (RTE (RE_POK_Function), Loc))); |
76a1c25b | 2843 | end if; |
2844 | ||
2845 | return | |
2846 | Make_Subprogram_Body (Loc, | |
aabafdc2 | 2847 | Specification => |
76a1c25b | 2848 | Make_Disp_Conditional_Select_Spec (Typ), |
aabafdc2 | 2849 | Declarations => Decls, |
76a1c25b | 2850 | Handled_Statement_Sequence => |
2851 | Make_Handled_Sequence_Of_Statements (Loc, Stmts)); | |
2852 | end Make_Disp_Conditional_Select_Body; | |
2853 | ||
2854 | --------------------------------------- | |
2855 | -- Make_Disp_Conditional_Select_Spec -- | |
2856 | --------------------------------------- | |
2857 | ||
2858 | function Make_Disp_Conditional_Select_Spec | |
2859 | (Typ : Entity_Id) return Node_Id | |
2860 | is | |
2861 | Loc : constant Source_Ptr := Sloc (Typ); | |
2862 | Def_Id : constant Node_Id := | |
2863 | Make_Defining_Identifier (Loc, | |
2864 | Name_uDisp_Conditional_Select); | |
2865 | Params : constant List_Id := New_List; | |
2866 | ||
2867 | begin | |
68f95949 | 2868 | pragma Assert (not Restriction_Active (No_Dispatching_Calls)); |
2869 | ||
725a69d2 | 2870 | -- T : in out Typ; -- Object parameter |
2871 | -- S : Integer; -- Primitive operation slot | |
2872 | -- P : Address; -- Wrapped parameters | |
2873 | -- C : out Prim_Op_Kind; -- Call kind | |
2874 | -- F : out Boolean; -- Status flag | |
2875 | ||
2876 | Append_List_To (Params, New_List ( | |
2877 | ||
2878 | Make_Parameter_Specification (Loc, | |
02a2406d | 2879 | Defining_Identifier => Make_Defining_Identifier (Loc, Name_uT), |
2880 | Parameter_Type => New_Occurrence_Of (Typ, Loc), | |
2881 | In_Present => True, | |
2882 | Out_Present => True), | |
725a69d2 | 2883 | |
2884 | Make_Parameter_Specification (Loc, | |
02a2406d | 2885 | Defining_Identifier => Make_Defining_Identifier (Loc, Name_uS), |
2886 | Parameter_Type => New_Occurrence_Of (Standard_Integer, Loc)), | |
725a69d2 | 2887 | |
2888 | Make_Parameter_Specification (Loc, | |
02a2406d | 2889 | Defining_Identifier => Make_Defining_Identifier (Loc, Name_uP), |
2890 | Parameter_Type => New_Occurrence_Of (RTE (RE_Address), Loc)), | |
76a1c25b | 2891 | |
725a69d2 | 2892 | Make_Parameter_Specification (Loc, |
02a2406d | 2893 | Defining_Identifier => Make_Defining_Identifier (Loc, Name_uC), |
2894 | Parameter_Type => | |
83c6c069 | 2895 | New_Occurrence_Of (RTE (RE_Prim_Op_Kind), Loc), |
02a2406d | 2896 | Out_Present => True), |
76a1c25b | 2897 | |
725a69d2 | 2898 | Make_Parameter_Specification (Loc, |
02a2406d | 2899 | Defining_Identifier => Make_Defining_Identifier (Loc, Name_uF), |
2900 | Parameter_Type => New_Occurrence_Of (Standard_Boolean, Loc), | |
2901 | Out_Present => True))); | |
76a1c25b | 2902 | |
2903 | return | |
2904 | Make_Procedure_Specification (Loc, | |
2905 | Defining_Unit_Name => Def_Id, | |
2906 | Parameter_Specifications => Params); | |
2907 | end Make_Disp_Conditional_Select_Spec; | |
2908 | ||
2909 | ------------------------------------- | |
2910 | -- Make_Disp_Get_Prim_Op_Kind_Body -- | |
2911 | ------------------------------------- | |
2912 | ||
02a2406d | 2913 | function Make_Disp_Get_Prim_Op_Kind_Body (Typ : Entity_Id) return Node_Id is |
bf7f5966 | 2914 | Loc : constant Source_Ptr := Sloc (Typ); |
2915 | Tag_Node : Node_Id; | |
76a1c25b | 2916 | |
2917 | begin | |
68f95949 | 2918 | pragma Assert (not Restriction_Active (No_Dispatching_Calls)); |
2919 | ||
76a1c25b | 2920 | if Is_Interface (Typ) then |
2921 | return | |
2922 | Make_Subprogram_Body (Loc, | |
02a2406d | 2923 | Specification => |
76a1c25b | 2924 | Make_Disp_Get_Prim_Op_Kind_Spec (Typ), |
02a2406d | 2925 | Declarations => New_List, |
76a1c25b | 2926 | Handled_Statement_Sequence => |
2927 | Make_Handled_Sequence_Of_Statements (Loc, | |
2928 | New_List (Make_Null_Statement (Loc)))); | |
e1c20931 | 2929 | end if; |
2930 | ||
d62940bf | 2931 | -- Generate: |
76a1c25b | 2932 | -- C := get_prim_op_kind (tag! (<type>VP), S); |
ee6ba406 | 2933 | |
76a1c25b | 2934 | -- where C is the out parameter capturing the call kind and S is the |
2935 | -- dispatch table slot number. | |
ee6ba406 | 2936 | |
bf7f5966 | 2937 | if Tagged_Type_Expansion then |
2938 | Tag_Node := | |
2939 | Unchecked_Convert_To (RTE (RE_Tag), | |
83c6c069 | 2940 | New_Occurrence_Of |
bf7f5966 | 2941 | (Node (First_Elmt (Access_Disp_Table (Typ))), Loc)); |
2942 | ||
2943 | else | |
2944 | Tag_Node := | |
2945 | Make_Attribute_Reference (Loc, | |
02a2406d | 2946 | Prefix => New_Occurrence_Of (Typ, Loc), |
bf7f5966 | 2947 | Attribute_Name => Name_Tag); |
2948 | end if; | |
2949 | ||
76a1c25b | 2950 | return |
2951 | Make_Subprogram_Body (Loc, | |
02a2406d | 2952 | Specification => |
76a1c25b | 2953 | Make_Disp_Get_Prim_Op_Kind_Spec (Typ), |
02a2406d | 2954 | Declarations => New_List, |
76a1c25b | 2955 | Handled_Statement_Sequence => |
2956 | Make_Handled_Sequence_Of_Statements (Loc, | |
2957 | New_List ( | |
2958 | Make_Assignment_Statement (Loc, | |
02a2406d | 2959 | Name => Make_Identifier (Loc, Name_uC), |
76a1c25b | 2960 | Expression => |
725a69d2 | 2961 | Make_Function_Call (Loc, |
2962 | Name => | |
83c6c069 | 2963 | New_Occurrence_Of (RTE (RE_Get_Prim_Op_Kind), Loc), |
725a69d2 | 2964 | Parameter_Associations => New_List ( |
bf7f5966 | 2965 | Tag_Node, |
2966 | Make_Identifier (Loc, Name_uS))))))); | |
76a1c25b | 2967 | end Make_Disp_Get_Prim_Op_Kind_Body; |
e1c20931 | 2968 | |
76a1c25b | 2969 | ------------------------------------- |
2970 | -- Make_Disp_Get_Prim_Op_Kind_Spec -- | |
2971 | ------------------------------------- | |
e1c20931 | 2972 | |
76a1c25b | 2973 | function Make_Disp_Get_Prim_Op_Kind_Spec |
2974 | (Typ : Entity_Id) return Node_Id | |
2975 | is | |
2976 | Loc : constant Source_Ptr := Sloc (Typ); | |
2977 | Def_Id : constant Node_Id := | |
02a2406d | 2978 | Make_Defining_Identifier (Loc, Name_uDisp_Get_Prim_Op_Kind); |
76a1c25b | 2979 | Params : constant List_Id := New_List; |
e1c20931 | 2980 | |
76a1c25b | 2981 | begin |
68f95949 | 2982 | pragma Assert (not Restriction_Active (No_Dispatching_Calls)); |
2983 | ||
725a69d2 | 2984 | -- T : in out Typ; -- Object parameter |
2985 | -- S : Integer; -- Primitive operation slot | |
2986 | -- C : out Prim_Op_Kind; -- Call kind | |
2987 | ||
2988 | Append_List_To (Params, New_List ( | |
2989 | ||
2990 | Make_Parameter_Specification (Loc, | |
02a2406d | 2991 | Defining_Identifier => Make_Defining_Identifier (Loc, Name_uT), |
2992 | Parameter_Type => New_Occurrence_Of (Typ, Loc), | |
2993 | In_Present => True, | |
2994 | Out_Present => True), | |
ee6ba406 | 2995 | |
725a69d2 | 2996 | Make_Parameter_Specification (Loc, |
02a2406d | 2997 | Defining_Identifier => Make_Defining_Identifier (Loc, Name_uS), |
2998 | Parameter_Type => New_Occurrence_Of (Standard_Integer, Loc)), | |
ee6ba406 | 2999 | |
725a69d2 | 3000 | Make_Parameter_Specification (Loc, |
02a2406d | 3001 | Defining_Identifier => Make_Defining_Identifier (Loc, Name_uC), |
3002 | Parameter_Type => | |
83c6c069 | 3003 | New_Occurrence_Of (RTE (RE_Prim_Op_Kind), Loc), |
02a2406d | 3004 | Out_Present => True))); |
76a1c25b | 3005 | |
3006 | return | |
3007 | Make_Procedure_Specification (Loc, | |
3008 | Defining_Unit_Name => Def_Id, | |
3009 | Parameter_Specifications => Params); | |
3010 | end Make_Disp_Get_Prim_Op_Kind_Spec; | |
3011 | ||
3012 | -------------------------------- | |
3013 | -- Make_Disp_Get_Task_Id_Body -- | |
3014 | -------------------------------- | |
3015 | ||
3016 | function Make_Disp_Get_Task_Id_Body | |
3017 | (Typ : Entity_Id) return Node_Id | |
3018 | is | |
3019 | Loc : constant Source_Ptr := Sloc (Typ); | |
3020 | Ret : Node_Id; | |
3021 | ||
3022 | begin | |
68f95949 | 3023 | pragma Assert (not Restriction_Active (No_Dispatching_Calls)); |
3024 | ||
76a1c25b | 3025 | if Is_Concurrent_Record_Type (Typ) |
3026 | and then Ekind (Corresponding_Concurrent_Type (Typ)) = E_Task_Type | |
3027 | then | |
725a69d2 | 3028 | -- Generate: |
3029 | -- return To_Address (_T._task_id); | |
3030 | ||
76a1c25b | 3031 | Ret := |
17e14451 | 3032 | Make_Simple_Return_Statement (Loc, |
76a1c25b | 3033 | Expression => |
725a69d2 | 3034 | Make_Unchecked_Type_Conversion (Loc, |
02a2406d | 3035 | Subtype_Mark => New_Occurrence_Of (RTE (RE_Address), Loc), |
3036 | Expression => | |
725a69d2 | 3037 | Make_Selected_Component (Loc, |
55868293 | 3038 | Prefix => Make_Identifier (Loc, Name_uT), |
3039 | Selector_Name => Make_Identifier (Loc, Name_uTask_Id)))); | |
76a1c25b | 3040 | |
3041 | -- A null body is constructed for non-task types | |
3042 | ||
3043 | else | |
725a69d2 | 3044 | -- Generate: |
3045 | -- return Null_Address; | |
3046 | ||
76a1c25b | 3047 | Ret := |
17e14451 | 3048 | Make_Simple_Return_Statement (Loc, |
02a2406d | 3049 | Expression => New_Occurrence_Of (RTE (RE_Null_Address), Loc)); |
76a1c25b | 3050 | end if; |
3051 | ||
3052 | return | |
3053 | Make_Subprogram_Body (Loc, | |
02a2406d | 3054 | Specification => Make_Disp_Get_Task_Id_Spec (Typ), |
3055 | Declarations => New_List, | |
76a1c25b | 3056 | Handled_Statement_Sequence => |
02a2406d | 3057 | Make_Handled_Sequence_Of_Statements (Loc, New_List (Ret))); |
76a1c25b | 3058 | end Make_Disp_Get_Task_Id_Body; |
3059 | ||
3060 | -------------------------------- | |
3061 | -- Make_Disp_Get_Task_Id_Spec -- | |
3062 | -------------------------------- | |
3063 | ||
3064 | function Make_Disp_Get_Task_Id_Spec | |
3065 | (Typ : Entity_Id) return Node_Id | |
3066 | is | |
725a69d2 | 3067 | Loc : constant Source_Ptr := Sloc (Typ); |
76a1c25b | 3068 | |
3069 | begin | |
68f95949 | 3070 | pragma Assert (not Restriction_Active (No_Dispatching_Calls)); |
3071 | ||
76a1c25b | 3072 | return |
3073 | Make_Function_Specification (Loc, | |
02a2406d | 3074 | Defining_Unit_Name => |
725a69d2 | 3075 | Make_Defining_Identifier (Loc, Name_uDisp_Get_Task_Id), |
76a1c25b | 3076 | Parameter_Specifications => New_List ( |
3077 | Make_Parameter_Specification (Loc, | |
02a2406d | 3078 | Defining_Identifier => Make_Defining_Identifier (Loc, Name_uT), |
3079 | Parameter_Type => New_Occurrence_Of (Typ, Loc))), | |
3080 | Result_Definition => | |
83c6c069 | 3081 | New_Occurrence_Of (RTE (RE_Address), Loc)); |
76a1c25b | 3082 | end Make_Disp_Get_Task_Id_Spec; |
3083 | ||
cdb1c38f | 3084 | ---------------------------- |
3085 | -- Make_Disp_Requeue_Body -- | |
3086 | ---------------------------- | |
3087 | ||
3088 | function Make_Disp_Requeue_Body | |
3089 | (Typ : Entity_Id) return Node_Id | |
3090 | is | |
3091 | Loc : constant Source_Ptr := Sloc (Typ); | |
3092 | Conc_Typ : Entity_Id := Empty; | |
3093 | Stmts : constant List_Id := New_List; | |
3094 | ||
3095 | begin | |
3096 | pragma Assert (not Restriction_Active (No_Dispatching_Calls)); | |
3097 | ||
3098 | -- Null body is generated for interface types and non-concurrent | |
3099 | -- tagged types. | |
3100 | ||
3101 | if Is_Interface (Typ) | |
3102 | or else not Is_Concurrent_Record_Type (Typ) | |
3103 | then | |
3104 | return | |
3105 | Make_Subprogram_Body (Loc, | |
02a2406d | 3106 | Specification => Make_Disp_Requeue_Spec (Typ), |
3107 | Declarations => No_List, | |
cdb1c38f | 3108 | Handled_Statement_Sequence => |
3109 | Make_Handled_Sequence_Of_Statements (Loc, | |
3110 | New_List (Make_Null_Statement (Loc)))); | |
3111 | end if; | |
3112 | ||
3113 | Conc_Typ := Corresponding_Concurrent_Type (Typ); | |
3114 | ||
3115 | if Ekind (Conc_Typ) = E_Protected_Type then | |
3116 | ||
3117 | -- Generate statements: | |
3118 | -- if F then | |
3119 | -- System.Tasking.Protected_Objects.Operations. | |
3120 | -- Requeue_Protected_Entry | |
3121 | -- (Protection_Entries_Access (P), | |
3122 | -- O._object'Unchecked_Access, | |
3123 | -- Protected_Entry_Index (I), | |
3124 | -- A); | |
3125 | -- else | |
3126 | -- System.Tasking.Protected_Objects.Operations. | |
3127 | -- Requeue_Task_To_Protected_Entry | |
3128 | -- (O._object'Unchecked_Access, | |
3129 | -- Protected_Entry_Index (I), | |
3130 | -- A); | |
3131 | -- end if; | |
3132 | ||
acf97c11 | 3133 | if Restriction_Active (No_Entry_Queue) then |
3134 | Append_To (Stmts, Make_Null_Statement (Loc)); | |
3135 | else | |
3136 | Append_To (Stmts, | |
3137 | Make_If_Statement (Loc, | |
55868293 | 3138 | Condition => Make_Identifier (Loc, Name_uF), |
cdb1c38f | 3139 | |
acf97c11 | 3140 | Then_Statements => |
3141 | New_List ( | |
cdb1c38f | 3142 | |
acf97c11 | 3143 | -- Call to Requeue_Protected_Entry |
cdb1c38f | 3144 | |
acf97c11 | 3145 | Make_Procedure_Call_Statement (Loc, |
3146 | Name => | |
02a2406d | 3147 | New_Occurrence_Of |
3148 | (RTE (RE_Requeue_Protected_Entry), Loc), | |
acf97c11 | 3149 | Parameter_Associations => |
3150 | New_List ( | |
3151 | ||
3152 | Make_Unchecked_Type_Conversion (Loc, -- PEA (P) | |
3153 | Subtype_Mark => | |
83c6c069 | 3154 | New_Occurrence_Of ( |
acf97c11 | 3155 | RTE (RE_Protection_Entries_Access), Loc), |
3156 | Expression => | |
3157 | Make_Identifier (Loc, Name_uP)), | |
3158 | ||
3159 | Make_Attribute_Reference (Loc, -- O._object'Acc | |
3160 | Attribute_Name => | |
3161 | Name_Unchecked_Access, | |
02a2406d | 3162 | Prefix => |
acf97c11 | 3163 | Make_Selected_Component (Loc, |
55868293 | 3164 | Prefix => |
acf97c11 | 3165 | Make_Identifier (Loc, Name_uO), |
3166 | Selector_Name => | |
3167 | Make_Identifier (Loc, Name_uObject))), | |
3168 | ||
3169 | Make_Unchecked_Type_Conversion (Loc, -- entry index | |
3170 | Subtype_Mark => | |
02a2406d | 3171 | New_Occurrence_Of |
3172 | (RTE (RE_Protected_Entry_Index), Loc), | |
55868293 | 3173 | Expression => Make_Identifier (Loc, Name_uI)), |
cdb1c38f | 3174 | |
acf97c11 | 3175 | Make_Identifier (Loc, Name_uA)))), -- abort status |
cdb1c38f | 3176 | |
acf97c11 | 3177 | Else_Statements => |
3178 | New_List ( | |
cdb1c38f | 3179 | |
acf97c11 | 3180 | -- Call to Requeue_Task_To_Protected_Entry |
cdb1c38f | 3181 | |
acf97c11 | 3182 | Make_Procedure_Call_Statement (Loc, |
3183 | Name => | |
02a2406d | 3184 | New_Occurrence_Of |
3185 | (RTE (RE_Requeue_Task_To_Protected_Entry), Loc), | |
acf97c11 | 3186 | Parameter_Associations => |
3187 | New_List ( | |
3188 | ||
3189 | Make_Attribute_Reference (Loc, -- O._object'Acc | |
02a2406d | 3190 | Attribute_Name => Name_Unchecked_Access, |
3191 | Prefix => | |
acf97c11 | 3192 | Make_Selected_Component (Loc, |
02a2406d | 3193 | Prefix => |
acf97c11 | 3194 | Make_Identifier (Loc, Name_uO), |
3195 | Selector_Name => | |
3196 | Make_Identifier (Loc, Name_uObject))), | |
3197 | ||
3198 | Make_Unchecked_Type_Conversion (Loc, -- entry index | |
3199 | Subtype_Mark => | |
02a2406d | 3200 | New_Occurrence_Of |
3201 | (RTE (RE_Protected_Entry_Index), Loc), | |
3202 | Expression => Make_Identifier (Loc, Name_uI)), | |
cdb1c38f | 3203 | |
acf97c11 | 3204 | Make_Identifier (Loc, Name_uA)))))); -- abort status |
3205 | end if; | |
02a2406d | 3206 | |
cdb1c38f | 3207 | else |
3208 | pragma Assert (Is_Task_Type (Conc_Typ)); | |
3209 | ||
3210 | -- Generate: | |
3211 | -- if F then | |
3212 | -- System.Tasking.Rendezvous.Requeue_Protected_To_Task_Entry | |
3213 | -- (Protection_Entries_Access (P), | |
3214 | -- O._task_id, | |
3215 | -- Task_Entry_Index (I), | |
3216 | -- A); | |
3217 | -- else | |
3218 | -- System.Tasking.Rendezvous.Requeue_Task_Entry | |
3219 | -- (O._task_id, | |
3220 | -- Task_Entry_Index (I), | |
3221 | -- A); | |
3222 | -- end if; | |
3223 | ||
3224 | Append_To (Stmts, | |
3225 | Make_If_Statement (Loc, | |
55868293 | 3226 | Condition => Make_Identifier (Loc, Name_uF), |
cdb1c38f | 3227 | |
55868293 | 3228 | Then_Statements => New_List ( |
cdb1c38f | 3229 | |
55868293 | 3230 | -- Call to Requeue_Protected_To_Task_Entry |
cdb1c38f | 3231 | |
55868293 | 3232 | Make_Procedure_Call_Statement (Loc, |
3233 | Name => | |
83c6c069 | 3234 | New_Occurrence_Of |
55868293 | 3235 | (RTE (RE_Requeue_Protected_To_Task_Entry), Loc), |
cdb1c38f | 3236 | |
55868293 | 3237 | Parameter_Associations => New_List ( |
cdb1c38f | 3238 | |
55868293 | 3239 | Make_Unchecked_Type_Conversion (Loc, -- PEA (P) |
3240 | Subtype_Mark => | |
83c6c069 | 3241 | New_Occurrence_Of |
55868293 | 3242 | (RTE (RE_Protection_Entries_Access), Loc), |
3243 | Expression => Make_Identifier (Loc, Name_uP)), | |
cdb1c38f | 3244 | |
55868293 | 3245 | Make_Selected_Component (Loc, -- O._task_id |
3246 | Prefix => Make_Identifier (Loc, Name_uO), | |
3247 | Selector_Name => Make_Identifier (Loc, Name_uTask_Id)), | |
cdb1c38f | 3248 | |
55868293 | 3249 | Make_Unchecked_Type_Conversion (Loc, -- entry index |
3250 | Subtype_Mark => | |
83c6c069 | 3251 | New_Occurrence_Of (RTE (RE_Task_Entry_Index), Loc), |
55868293 | 3252 | Expression => Make_Identifier (Loc, Name_uI)), |
cdb1c38f | 3253 | |
55868293 | 3254 | Make_Identifier (Loc, Name_uA)))), -- abort status |
cdb1c38f | 3255 | |
55868293 | 3256 | Else_Statements => New_List ( |
cdb1c38f | 3257 | |
55868293 | 3258 | -- Call to Requeue_Task_Entry |
cdb1c38f | 3259 | |
55868293 | 3260 | Make_Procedure_Call_Statement (Loc, |
02a2406d | 3261 | Name => |
3262 | New_Occurrence_Of (RTE (RE_Requeue_Task_Entry), Loc), | |
cdb1c38f | 3263 | |
55868293 | 3264 | Parameter_Associations => New_List ( |
cdb1c38f | 3265 | |
55868293 | 3266 | Make_Selected_Component (Loc, -- O._task_id |
3267 | Prefix => Make_Identifier (Loc, Name_uO), | |
3268 | Selector_Name => Make_Identifier (Loc, Name_uTask_Id)), | |
cdb1c38f | 3269 | |
55868293 | 3270 | Make_Unchecked_Type_Conversion (Loc, -- entry index |
3271 | Subtype_Mark => | |
83c6c069 | 3272 | New_Occurrence_Of (RTE (RE_Task_Entry_Index), Loc), |
55868293 | 3273 | Expression => Make_Identifier (Loc, Name_uI)), |
cdb1c38f | 3274 | |
55868293 | 3275 | Make_Identifier (Loc, Name_uA)))))); -- abort status |
cdb1c38f | 3276 | end if; |
3277 | ||
3278 | -- Even though no declarations are needed in both cases, we allocate | |
3279 | -- a list for entities added by Freeze. | |
3280 | ||
3281 | return | |
3282 | Make_Subprogram_Body (Loc, | |
02a2406d | 3283 | Specification => Make_Disp_Requeue_Spec (Typ), |
3284 | Declarations => New_List, | |
cdb1c38f | 3285 | Handled_Statement_Sequence => |
3286 | Make_Handled_Sequence_Of_Statements (Loc, Stmts)); | |
3287 | end Make_Disp_Requeue_Body; | |
3288 | ||
3289 | ---------------------------- | |
3290 | -- Make_Disp_Requeue_Spec -- | |
3291 | ---------------------------- | |
3292 | ||
3293 | function Make_Disp_Requeue_Spec | |
3294 | (Typ : Entity_Id) return Node_Id | |
3295 | is | |
3296 | Loc : constant Source_Ptr := Sloc (Typ); | |
3297 | ||
3298 | begin | |
3299 | pragma Assert (not Restriction_Active (No_Dispatching_Calls)); | |
3300 | ||
3301 | -- O : in out Typ; - Object parameter | |
3302 | -- F : Boolean; - Protected (True) / task (False) flag | |
3303 | -- P : Address; - Protection_Entries_Access value | |
3304 | -- I : Entry_Index - Index of entry call | |
3305 | -- A : Boolean - Abort flag | |
3306 | ||
3307 | -- Note that the Protection_Entries_Access value is represented as a | |
3308 | -- System.Address in order to avoid dragging in the tasking runtime | |
3309 | -- when compiling sources without tasking constructs. | |
3310 | ||
3311 | return | |
3312 | Make_Procedure_Specification (Loc, | |
3313 | Defining_Unit_Name => | |
3314 | Make_Defining_Identifier (Loc, Name_uDisp_Requeue), | |
3315 | ||
02a2406d | 3316 | Parameter_Specifications => New_List ( |
cdb1c38f | 3317 | |
3318 | Make_Parameter_Specification (Loc, -- O | |
3319 | Defining_Identifier => | |
3320 | Make_Defining_Identifier (Loc, Name_uO), | |
02a2406d | 3321 | Parameter_Type => |
83c6c069 | 3322 | New_Occurrence_Of (Typ, Loc), |
02a2406d | 3323 | In_Present => True, |
3324 | Out_Present => True), | |
cdb1c38f | 3325 | |
3326 | Make_Parameter_Specification (Loc, -- F | |
3327 | Defining_Identifier => | |
3328 | Make_Defining_Identifier (Loc, Name_uF), | |
02a2406d | 3329 | Parameter_Type => |
83c6c069 | 3330 | New_Occurrence_Of (Standard_Boolean, Loc)), |
cdb1c38f | 3331 | |
3332 | Make_Parameter_Specification (Loc, -- P | |
3333 | Defining_Identifier => | |
3334 | Make_Defining_Identifier (Loc, Name_uP), | |
02a2406d | 3335 | Parameter_Type => |
83c6c069 | 3336 | New_Occurrence_Of (RTE (RE_Address), Loc)), |
cdb1c38f | 3337 | |
3338 | Make_Parameter_Specification (Loc, -- I | |
3339 | Defining_Identifier => | |
3340 | Make_Defining_Identifier (Loc, Name_uI), | |
02a2406d | 3341 | Parameter_Type => |
83c6c069 | 3342 | New_Occurrence_Of (Standard_Integer, Loc)), |
cdb1c38f | 3343 | |
3344 | Make_Parameter_Specification (Loc, -- A | |
3345 | Defining_Identifier => | |
3346 | Make_Defining_Identifier (Loc, Name_uA), | |
02a2406d | 3347 | Parameter_Type => |
83c6c069 | 3348 | New_Occurrence_Of (Standard_Boolean, Loc)))); |
cdb1c38f | 3349 | end Make_Disp_Requeue_Spec; |
3350 | ||
76a1c25b | 3351 | --------------------------------- |
3352 | -- Make_Disp_Timed_Select_Body -- | |
3353 | --------------------------------- | |
3354 | ||
cdb1c38f | 3355 | -- For interface types, generate: |
3356 | ||
3357 | -- procedure _Disp_Timed_Select | |
3358 | -- (T : in out <Typ>; | |
3359 | -- S : Integer; | |
3360 | -- P : System.Address; | |
3361 | -- D : Duration; | |
3362 | -- M : Integer; | |
3363 | -- C : out Ada.Tags.Prim_Op_Kind; | |
3364 | -- F : out Boolean) | |
3365 | -- is | |
3366 | -- begin | |
a053db0d | 3367 | -- F := False; |
3368 | -- C := Ada.Tags.POK_Function; | |
cdb1c38f | 3369 | -- end _Disp_Timed_Select; |
3370 | ||
3371 | -- For protected types, generate: | |
3372 | ||
3373 | -- procedure _Disp_Timed_Select | |
3374 | -- (T : in out <Typ>; | |
3375 | -- S : Integer; | |
3376 | -- P : System.Address; | |
3377 | -- D : Duration; | |
3378 | -- M : Integer; | |
3379 | -- C : out Ada.Tags.Prim_Op_Kind; | |
3380 | -- F : out Boolean) | |
3381 | -- is | |
3382 | -- I : Integer; | |
3383 | ||
3384 | -- begin | |
3385 | -- C := Ada.Tags.Get_Prim_Op_Kind (Ada.Tags.Tag (<Typ>VP), S); | |
3386 | ||
3387 | -- if C = Ada.Tags.POK_Procedure | |
3388 | -- or else C = Ada.Tags.POK_Protected_Procedure | |
3389 | -- or else C = Ada.Tags.POK_Task_Procedure | |
3390 | -- then | |
3391 | -- F := True; | |
3392 | -- return; | |
3393 | -- end if; | |
3394 | ||
3395 | -- I := Ada.Tags.Get_Entry_Index (Ada.Tags.Tag (<Typ>VP), S); | |
3396 | -- System.Tasking.Protected_Objects.Operations. | |
3397 | -- Timed_Protected_Entry_Call | |
3398 | -- (T._object'Access, | |
3399 | -- System.Tasking.Protected_Objects.Protected_Entry_Index (I), | |
3400 | -- P, | |
3401 | -- D, | |
3402 | -- M, | |
3403 | -- F); | |
3404 | -- end _Disp_Timed_Select; | |
3405 | ||
3406 | -- For task types, generate: | |
3407 | ||
3408 | -- procedure _Disp_Timed_Select | |
3409 | -- (T : in out <Typ>; | |
3410 | -- S : Integer; | |
3411 | -- P : System.Address; | |
3412 | -- D : Duration; | |
3413 | -- M : Integer; | |
3414 | -- C : out Ada.Tags.Prim_Op_Kind; | |
3415 | -- F : out Boolean) | |
3416 | -- is | |
3417 | -- I : Integer; | |
3418 | ||
3419 | -- begin | |
3420 | -- I := Ada.Tags.Get_Entry_Index (Ada.Tags.Tag (<Typ>VP), S); | |
3421 | -- System.Tasking.Rendezvous.Timed_Task_Entry_Call | |
3422 | -- (T._task_id, | |
3423 | -- System.Tasking.Task_Entry_Index (I), | |
3424 | -- P, | |
3425 | -- D, | |
3426 | -- M, | |
a053db0d | 3427 | -- F); |
cdb1c38f | 3428 | -- end _Disp_Time_Select; |
3429 | ||
76a1c25b | 3430 | function Make_Disp_Timed_Select_Body |
3431 | (Typ : Entity_Id) return Node_Id | |
3432 | is | |
3433 | Loc : constant Source_Ptr := Sloc (Typ); | |
3434 | Conc_Typ : Entity_Id := Empty; | |
3435 | Decls : constant List_Id := New_List; | |
acf97c11 | 3436 | Obj_Ref : Node_Id; |
76a1c25b | 3437 | Stmts : constant List_Id := New_List; |
bf7f5966 | 3438 | Tag_Node : Node_Id; |
76a1c25b | 3439 | |
3440 | begin | |
68f95949 | 3441 | pragma Assert (not Restriction_Active (No_Dispatching_Calls)); |
3442 | ||
952af0b9 | 3443 | -- Null body is generated for interface types |
3444 | ||
76a1c25b | 3445 | if Is_Interface (Typ) then |
3446 | return | |
3447 | Make_Subprogram_Body (Loc, | |
02a2406d | 3448 | Specification => Make_Disp_Timed_Select_Spec (Typ), |
3449 | Declarations => New_List, | |
76a1c25b | 3450 | Handled_Statement_Sequence => |
3451 | Make_Handled_Sequence_Of_Statements (Loc, | |
aabafdc2 | 3452 | New_List ( |
3453 | Make_Assignment_Statement (Loc, | |
3454 | Name => Make_Identifier (Loc, Name_uF), | |
83c6c069 | 3455 | Expression => New_Occurrence_Of (Standard_False, Loc))))); |
76a1c25b | 3456 | end if; |
3457 | ||
952af0b9 | 3458 | if Is_Concurrent_Record_Type (Typ) then |
3459 | Conc_Typ := Corresponding_Concurrent_Type (Typ); | |
76a1c25b | 3460 | |
3461 | -- Generate: | |
3462 | -- I : Integer; | |
3463 | ||
3464 | -- where I will be used to capture the entry index of the primitive | |
3465 | -- wrapper at position S. | |
3466 | ||
3467 | Append_To (Decls, | |
3468 | Make_Object_Declaration (Loc, | |
aabafdc2 | 3469 | Defining_Identifier => Make_Defining_Identifier (Loc, Name_uI), |
83c6c069 | 3470 | Object_Definition => |
3471 | New_Occurrence_Of (Standard_Integer, Loc))); | |
76a1c25b | 3472 | |
952af0b9 | 3473 | -- Generate: |
3474 | -- C := Get_Prim_Op_Kind (tag! (<type>VP), S); | |
76a1c25b | 3475 | |
952af0b9 | 3476 | -- if C = POK_Procedure |
3477 | -- or else C = POK_Protected_Procedure | |
3478 | -- or else C = POK_Task_Procedure; | |
3479 | -- then | |
3480 | -- F := True; | |
3481 | -- return; | |
3482 | -- end if; | |
76a1c25b | 3483 | |
e58ae6f1 | 3484 | Build_Common_Dispatching_Select_Statements (Typ, Stmts); |
76a1c25b | 3485 | |
3486 | -- Generate: | |
952af0b9 | 3487 | -- I := Get_Entry_Index (tag! (<type>VP), S); |
76a1c25b | 3488 | |
3489 | -- I is the entry index and S is the dispatch table slot | |
3490 | ||
bf7f5966 | 3491 | if Tagged_Type_Expansion then |
3492 | Tag_Node := | |
3493 | Unchecked_Convert_To (RTE (RE_Tag), | |
83c6c069 | 3494 | New_Occurrence_Of |
bf7f5966 | 3495 | (Node (First_Elmt (Access_Disp_Table (Typ))), Loc)); |
3496 | ||
3497 | else | |
3498 | Tag_Node := | |
3499 | Make_Attribute_Reference (Loc, | |
83c6c069 | 3500 | Prefix => New_Occurrence_Of (Typ, Loc), |
bf7f5966 | 3501 | Attribute_Name => Name_Tag); |
3502 | end if; | |
3503 | ||
76a1c25b | 3504 | Append_To (Stmts, |
3505 | Make_Assignment_Statement (Loc, | |
55868293 | 3506 | Name => Make_Identifier (Loc, Name_uI), |
76a1c25b | 3507 | Expression => |
725a69d2 | 3508 | Make_Function_Call (Loc, |
83c6c069 | 3509 | Name => New_Occurrence_Of (RTE (RE_Get_Entry_Index), Loc), |
02a2406d | 3510 | Parameter_Associations => New_List ( |
3511 | Tag_Node, | |
3512 | Make_Identifier (Loc, Name_uS))))); | |
76a1c25b | 3513 | |
acf97c11 | 3514 | -- Protected case |
3515 | ||
76a1c25b | 3516 | if Ekind (Conc_Typ) = E_Protected_Type then |
3517 | ||
acf97c11 | 3518 | -- Build T._object'Access |
3519 | ||
3520 | Obj_Ref := | |
3521 | Make_Attribute_Reference (Loc, | |
3522 | Attribute_Name => Name_Unchecked_Access, | |
3523 | Prefix => | |
3524 | Make_Selected_Component (Loc, | |
3525 | Prefix => Make_Identifier (Loc, Name_uT), | |
3526 | Selector_Name => Make_Identifier (Loc, Name_uObject))); | |
3527 | ||
3528 | -- Normal case, No_Entry_Queue restriction not active. In this | |
3529 | -- case we generate: | |
3530 | ||
3531 | -- Timed_Protected_Entry_Call | |
3532 | -- (T._object'access, | |
cdb1c38f | 3533 | -- Protected_Entry_Index! (I), |
acf97c11 | 3534 | -- P, D, M, F); |
76a1c25b | 3535 | |
3536 | -- where T is the protected object, I is the entry index, P are | |
3537 | -- the wrapped parameters, D is the delay amount, M is the delay | |
3538 | -- mode and F is the status flag. | |
3539 | ||
10970cab | 3540 | -- Historically, there was also an implementation for single |
3541 | -- entry protected types (in s-tposen). However, it was removed | |
3542 | -- by also testing for no No_Select_Statements restriction in | |
3543 | -- Exp_Utils.Corresponding_Runtime_Package. This simplified the | |
8dfd0767 | 3544 | -- implementation of s-tposen.adb and provided consistency between |
3545 | -- all versions of System.Tasking.Protected_Objects.Single_Entry | |
3546 | -- (s-tposen*.adb). | |
10970cab | 3547 | |
acf97c11 | 3548 | case Corresponding_Runtime_Package (Conc_Typ) is |
3549 | when System_Tasking_Protected_Objects_Entries => | |
3550 | Append_To (Stmts, | |
3551 | Make_Procedure_Call_Statement (Loc, | |
3552 | Name => | |
83c6c069 | 3553 | New_Occurrence_Of |
acf97c11 | 3554 | (RTE (RE_Timed_Protected_Entry_Call), Loc), |
02a2406d | 3555 | Parameter_Associations => New_List ( |
3556 | Obj_Ref, | |
acf97c11 | 3557 | |
02a2406d | 3558 | Make_Unchecked_Type_Conversion (Loc, -- entry index |
3559 | Subtype_Mark => | |
3560 | New_Occurrence_Of | |
3561 | (RTE (RE_Protected_Entry_Index), Loc), | |
3562 | Expression => Make_Identifier (Loc, Name_uI)), | |
76a1c25b | 3563 | |
99378362 | 3564 | Make_Identifier (Loc, Name_uP), -- parameter block |
3565 | Make_Identifier (Loc, Name_uD), -- delay | |
3566 | Make_Identifier (Loc, Name_uM), -- delay mode | |
02a2406d | 3567 | Make_Identifier (Loc, Name_uF)))); -- status flag |
76a1c25b | 3568 | |
acf97c11 | 3569 | when others => |
3570 | raise Program_Error; | |
3571 | end case; | |
3572 | ||
3573 | -- Task case | |
ee6ba406 | 3574 | |
ee6ba406 | 3575 | else |
76a1c25b | 3576 | pragma Assert (Ekind (Conc_Typ) = E_Task_Type); |
3577 | ||
3578 | -- Generate: | |
3579 | -- Timed_Task_Entry_Call ( | |
3580 | -- T._task_id, | |
cdb1c38f | 3581 | -- Task_Entry_Index! (I), |
76a1c25b | 3582 | -- P, |
3583 | -- D, | |
3584 | -- M, | |
3585 | -- F); | |
3586 | ||
3587 | -- where T is the task object, I is the entry index, P are the | |
3588 | -- wrapped parameters, D is the delay amount, M is the delay | |
3589 | -- mode and F is the status flag. | |
3590 | ||
3591 | Append_To (Stmts, | |
3592 | Make_Procedure_Call_Statement (Loc, | |
02a2406d | 3593 | Name => |
83c6c069 | 3594 | New_Occurrence_Of (RTE (RE_Timed_Task_Entry_Call), Loc), |
76a1c25b | 3595 | |
02a2406d | 3596 | Parameter_Associations => New_List ( |
3597 | Make_Selected_Component (Loc, -- T._task_id | |
3598 | Prefix => Make_Identifier (Loc, Name_uT), | |
3599 | Selector_Name => Make_Identifier (Loc, Name_uTask_Id)), | |
76a1c25b | 3600 | |
02a2406d | 3601 | Make_Unchecked_Type_Conversion (Loc, -- entry index |
3602 | Subtype_Mark => | |
3603 | New_Occurrence_Of (RTE (RE_Task_Entry_Index), Loc), | |
3604 | Expression => Make_Identifier (Loc, Name_uI)), | |
76a1c25b | 3605 | |
02a2406d | 3606 | Make_Identifier (Loc, Name_uP), -- parameter block |
3607 | Make_Identifier (Loc, Name_uD), -- delay | |
3608 | Make_Identifier (Loc, Name_uM), -- delay mode | |
3609 | Make_Identifier (Loc, Name_uF)))); -- status flag | |
ee6ba406 | 3610 | end if; |
7c949aad | 3611 | |
3612 | else | |
a053db0d | 3613 | -- Initialize out parameters |
7c949aad | 3614 | |
a053db0d | 3615 | Append_To (Stmts, |
3616 | Make_Assignment_Statement (Loc, | |
aabafdc2 | 3617 | Name => Make_Identifier (Loc, Name_uF), |
83c6c069 | 3618 | Expression => New_Occurrence_Of (Standard_False, Loc))); |
a053db0d | 3619 | Append_To (Stmts, |
3620 | Make_Assignment_Statement (Loc, | |
aabafdc2 | 3621 | Name => Make_Identifier (Loc, Name_uC), |
83c6c069 | 3622 | Expression => New_Occurrence_Of (RTE (RE_POK_Function), Loc))); |
76a1c25b | 3623 | end if; |
3624 | ||
3625 | return | |
3626 | Make_Subprogram_Body (Loc, | |
aabafdc2 | 3627 | Specification => Make_Disp_Timed_Select_Spec (Typ), |
3628 | Declarations => Decls, | |
76a1c25b | 3629 | Handled_Statement_Sequence => |
3630 | Make_Handled_Sequence_Of_Statements (Loc, Stmts)); | |
3631 | end Make_Disp_Timed_Select_Body; | |
3632 | ||
3633 | --------------------------------- | |
3634 | -- Make_Disp_Timed_Select_Spec -- | |
3635 | --------------------------------- | |
3636 | ||
3637 | function Make_Disp_Timed_Select_Spec | |
3638 | (Typ : Entity_Id) return Node_Id | |
3639 | is | |
3640 | Loc : constant Source_Ptr := Sloc (Typ); | |
3641 | Def_Id : constant Node_Id := | |
3642 | Make_Defining_Identifier (Loc, | |
3643 | Name_uDisp_Timed_Select); | |
3644 | Params : constant List_Id := New_List; | |
ee6ba406 | 3645 | |
76a1c25b | 3646 | begin |
68f95949 | 3647 | pragma Assert (not Restriction_Active (No_Dispatching_Calls)); |
3648 | ||
725a69d2 | 3649 | -- T : in out Typ; -- Object parameter |
3650 | -- S : Integer; -- Primitive operation slot | |
3651 | -- P : Address; -- Wrapped parameters | |
3652 | -- D : Duration; -- Delay | |
3653 | -- M : Integer; -- Delay Mode | |
3654 | -- C : out Prim_Op_Kind; -- Call kind | |
3655 | -- F : out Boolean; -- Status flag | |
76a1c25b | 3656 | |
725a69d2 | 3657 | Append_List_To (Params, New_List ( |
3658 | ||
3659 | Make_Parameter_Specification (Loc, | |
02a2406d | 3660 | Defining_Identifier => Make_Defining_Identifier (Loc, Name_uT), |
3661 | Parameter_Type => New_Occurrence_Of (Typ, Loc), | |
3662 | In_Present => True, | |
3663 | Out_Present => True), | |
725a69d2 | 3664 | |
3665 | Make_Parameter_Specification (Loc, | |
02a2406d | 3666 | Defining_Identifier => Make_Defining_Identifier (Loc, Name_uS), |
3667 | Parameter_Type => New_Occurrence_Of (Standard_Integer, Loc)), | |
725a69d2 | 3668 | |
3669 | Make_Parameter_Specification (Loc, | |
02a2406d | 3670 | Defining_Identifier => Make_Defining_Identifier (Loc, Name_uP), |
3671 | Parameter_Type => New_Occurrence_Of (RTE (RE_Address), Loc)), | |
76a1c25b | 3672 | |
76a1c25b | 3673 | Make_Parameter_Specification (Loc, |
02a2406d | 3674 | Defining_Identifier => Make_Defining_Identifier (Loc, Name_uD), |
3675 | Parameter_Type => New_Occurrence_Of (Standard_Duration, Loc)), | |
76a1c25b | 3676 | |
76a1c25b | 3677 | Make_Parameter_Specification (Loc, |
02a2406d | 3678 | Defining_Identifier => Make_Defining_Identifier (Loc, Name_uM), |
3679 | Parameter_Type => New_Occurrence_Of (Standard_Integer, Loc)), | |
ee6ba406 | 3680 | |
725a69d2 | 3681 | Make_Parameter_Specification (Loc, |
02a2406d | 3682 | Defining_Identifier => Make_Defining_Identifier (Loc, Name_uC), |
3683 | Parameter_Type => | |
83c6c069 | 3684 | New_Occurrence_Of (RTE (RE_Prim_Op_Kind), Loc), |
02a2406d | 3685 | Out_Present => True))); |
ee6ba406 | 3686 | |
725a69d2 | 3687 | Append_To (Params, |
3688 | Make_Parameter_Specification (Loc, | |
02a2406d | 3689 | Defining_Identifier => Make_Defining_Identifier (Loc, Name_uF), |
3690 | Parameter_Type => New_Occurrence_Of (Standard_Boolean, Loc), | |
3691 | Out_Present => True)); | |
ee6ba406 | 3692 | |
76a1c25b | 3693 | return |
3694 | Make_Procedure_Specification (Loc, | |
3695 | Defining_Unit_Name => Def_Id, | |
3696 | Parameter_Specifications => Params); | |
3697 | end Make_Disp_Timed_Select_Spec; | |
ee6ba406 | 3698 | |
76a1c25b | 3699 | ------------- |
3700 | -- Make_DT -- | |
3701 | ------------- | |
ee6ba406 | 3702 | |
725a69d2 | 3703 | -- The frontend supports two models for expanding dispatch tables |
02a2406d | 3704 | -- associated with library-level defined tagged types: statically and |
3705 | -- non-statically allocated dispatch tables. In the former case the object | |
3706 | -- containing the dispatch table is constant and it is initialized by means | |
3707 | -- of a positional aggregate. In the latter case, the object containing | |
3708 | -- the dispatch table is a variable which is initialized by means of | |
3709 | -- assignments. | |
725a69d2 | 3710 | |
3711 | -- In case of locally defined tagged types, the object containing the | |
02a2406d | 3712 | -- object containing the dispatch table is always a variable (instead of a |
3713 | -- constant). This is currently required to give support to late overriding | |
3714 | -- of primitives. For example: | |
725a69d2 | 3715 | |
3716 | -- procedure Example is | |
3717 | -- package Pkg is | |
3718 | -- type T1 is tagged null record; | |
3719 | -- procedure Prim (O : T1); | |
3720 | -- end Pkg; | |
3721 | ||
3722 | -- type T2 is new Pkg.T1 with null record; | |
3723 | -- procedure Prim (X : T2) is -- late overriding | |
3724 | -- begin | |
3725 | -- ... | |
3726 | -- ... | |
3727 | -- end; | |
952af0b9 | 3728 | |
1ecdfe4b | 3729 | -- WARNING: This routine manages Ghost regions. Return statements must be |
3730 | -- replaced by gotos which jump to the end of the routine and restore the | |
3731 | -- Ghost mode. | |
3732 | ||
17e14451 | 3733 | function Make_DT (Typ : Entity_Id; N : Node_Id := Empty) return List_Id is |
3734 | Loc : constant Source_Ptr := Sloc (Typ); | |
3735 | ||
725a69d2 | 3736 | Max_Predef_Prims : constant Int := |
3737 | UI_To_Int | |
3738 | (Intval | |
3739 | (Expression | |
17e14451 | 3740 | (Parent (RTE (RE_Max_Predef_Prims))))); |
3741 | ||
cc60bd16 | 3742 | DT_Decl : constant Elist_Id := New_Elmt_List; |
3743 | DT_Aggr : constant Elist_Id := New_Elmt_List; | |
3744 | -- Entities marked with attribute Is_Dispatch_Table_Entity | |
3745 | ||
9a666241 | 3746 | Dummy_Object : Entity_Id := Empty; |
3747 | -- Extra nonexistent object of type Typ internally used to compute the | |
3748 | -- offset to the components that reference secondary dispatch tables. | |
3749 | -- Used to statically allocate secondary dispatch tables. | |
3750 | ||
349db231 | 3751 | procedure Check_Premature_Freezing |
3752 | (Subp : Entity_Id; | |
3753 | Tagged_Type : Entity_Id; | |
3754 | Typ : Entity_Id); | |
d1a2e31b | 3755 | -- Verify that all untagged types in the profile of a subprogram are |
3756 | -- frozen at the point the subprogram is frozen. This enforces the rule | |
3757 | -- on RM 13.14 (14) as modified by AI05-019. At the point a subprogram | |
3758 | -- is frozen, enough must be known about it to build the activation | |
3759 | -- record for it, which requires at least that the size of all | |
3760 | -- parameters be known. Controlling arguments are by-reference, | |
decd66e0 | 3761 | -- and therefore the rule only applies to untagged types. Typical |
d1a2e31b | 3762 | -- violation of the rule involves an object declaration that freezes a |
3763 | -- tagged type, when one of its primitive operations has a type in its | |
3764 | -- profile whose full view has not been analyzed yet. More complex cases | |
3765 | -- involve composite types that have one private unfrozen subcomponent. | |
725a69d2 | 3766 | |
f301a57b | 3767 | procedure Export_DT (Typ : Entity_Id; DT : Entity_Id; Index : Nat := 0); |
3768 | -- Export the dispatch table DT of tagged type Typ. Required to generate | |
3769 | -- forward references and statically allocate the table. For primary | |
3770 | -- dispatch tables Index is 0; for secondary dispatch tables the value | |
3771 | -- of index must match the Suffix_Index value assigned to the table by | |
3772 | -- Make_Tags when generating its unique external name, and it is used to | |
3773 | -- retrieve from the Dispatch_Table_Wrappers list associated with Typ | |
3774 | -- the external name generated by Import_DT. | |
24971415 | 3775 | |
725a69d2 | 3776 | procedure Make_Secondary_DT |
acf97c11 | 3777 | (Typ : Entity_Id; |
3778 | Iface : Entity_Id; | |
9a666241 | 3779 | Iface_Comp : Node_Id; |
f301a57b | 3780 | Suffix_Index : Int; |
acf97c11 | 3781 | Num_Iface_Prims : Nat; |
3782 | Iface_DT_Ptr : Entity_Id; | |
3783 | Predef_Prims_Ptr : Entity_Id; | |
3784 | Build_Thunks : Boolean; | |
3785 | Result : List_Id); | |
cdb1c38f | 3786 | -- Ada 2005 (AI-251): Expand the declarations for a Secondary Dispatch |
3787 | -- Table of Typ associated with Iface. Each abstract interface of Typ | |
3788 | -- has two secondary dispatch tables: one containing pointers to thunks | |
3789 | -- and another containing pointers to the primitives covering the | |
3790 | -- interface primitives. The former secondary table is generated when | |
3791 | -- Build_Thunks is True, and provides common support for dispatching | |
3792 | -- calls through interface types; the latter secondary table is | |
3793 | -- generated when Build_Thunks is False, and provides support for | |
3794 | -- Generic Dispatching Constructors that dispatch calls through | |
278c67dc | 3795 | -- interface types. When constructing this latter table the value of |
3796 | -- Suffix_Index is -1 to indicate that there is no need to export such | |
3797 | -- table when building statically allocated dispatch tables; a positive | |
3798 | -- value of Suffix_Index must match the Suffix_Index value assigned to | |
3799 | -- this secondary dispatch table by Make_Tags when its unique external | |
3800 | -- name was generated. | |
9dfe12ae | 3801 | |
17e14451 | 3802 | ------------------------------ |
3803 | -- Check_Premature_Freezing -- | |
3804 | ------------------------------ | |
3805 | ||
349db231 | 3806 | procedure Check_Premature_Freezing |
3807 | (Subp : Entity_Id; | |
3808 | Tagged_Type : Entity_Id; | |
3809 | Typ : Entity_Id) | |
3810 | is | |
3811 | Comp : Entity_Id; | |
aada9bb5 | 3812 | |
3813 | function Is_Actual_For_Formal_Incomplete_Type | |
3814 | (T : Entity_Id) return Boolean; | |
65a805b2 | 3815 | -- In Ada 2012, if a nested generic has an incomplete formal type, |
3816 | -- the actual may be (and usually is) a private type whose completion | |
5f8e1c78 | 3817 | -- appears later. It is safe to build the dispatch table in this |
3818 | -- case, gigi will have full views available. | |
3819 | ||
3820 | ------------------------------------------ | |
3821 | -- Is_Actual_For_Formal_Incomplete_Type -- | |
3822 | ------------------------------------------ | |
3823 | ||
aada9bb5 | 3824 | function Is_Actual_For_Formal_Incomplete_Type |
3825 | (T : Entity_Id) return Boolean | |
5f8e1c78 | 3826 | is |
3827 | Gen_Par : Entity_Id; | |
3828 | F : Node_Id; | |
aada9bb5 | 3829 | |
5f8e1c78 | 3830 | begin |
3831 | if not Is_Generic_Instance (Current_Scope) | |
3832 | or else not Used_As_Generic_Actual (T) | |
3833 | then | |
3834 | return False; | |
5f8e1c78 | 3835 | else |
3836 | Gen_Par := Generic_Parent (Parent (Current_Scope)); | |
3837 | end if; | |
3838 | ||
3839 | F := | |
3840 | First | |
3841 | (Generic_Formal_Declarations | |
02a2406d | 3842 | (Unit_Declaration_Node (Gen_Par))); |
5f8e1c78 | 3843 | while Present (F) loop |
3844 | if Ekind (Defining_Identifier (F)) = E_Incomplete_Type then | |
3845 | return True; | |
3846 | end if; | |
3847 | ||
3848 | Next (F); | |
3849 | end loop; | |
3850 | ||
3851 | return False; | |
3852 | end Is_Actual_For_Formal_Incomplete_Type; | |
278c67dc | 3853 | |
aada9bb5 | 3854 | -- Start of processing for Check_Premature_Freezing |
3855 | ||
17e14451 | 3856 | begin |
496b8337 | 3857 | -- Note that if the type is a (subtype of) a generic actual, the |
3858 | -- actual will have been frozen by the instantiation. | |
3859 | ||
17e14451 | 3860 | if Present (N) |
349db231 | 3861 | and then Is_Private_Type (Typ) |
17e14451 | 3862 | and then No (Full_View (Typ)) |
3863 | and then not Is_Generic_Type (Typ) | |
3864 | and then not Is_Tagged_Type (Typ) | |
3865 | and then not Is_Frozen (Typ) | |
496b8337 | 3866 | and then not Is_Generic_Actual_Type (Typ) |
17e14451 | 3867 | then |
3868 | Error_Msg_Sloc := Sloc (Subp); | |
503f7fd3 | 3869 | Error_Msg_NE |
17e14451 | 3870 | ("declaration must appear after completion of type &", N, Typ); |
3871 | Error_Msg_NE | |
02a2406d | 3872 | ("\which is an untagged type in the profile of " |
3873 | & "primitive operation & declared#", N, Subp); | |
349db231 | 3874 | |
3875 | else | |
3876 | Comp := Private_Component (Typ); | |
3877 | ||
3878 | if not Is_Tagged_Type (Typ) | |
3879 | and then Present (Comp) | |
3880 | and then not Is_Frozen (Comp) | |
02a2406d | 3881 | and then not Is_Actual_For_Formal_Incomplete_Type (Comp) |
349db231 | 3882 | then |
3883 | Error_Msg_Sloc := Sloc (Subp); | |
3884 | Error_Msg_Node_2 := Subp; | |
3885 | Error_Msg_Name_1 := Chars (Tagged_Type); | |
3886 | Error_Msg_NE | |
3887 | ("declaration must appear after completion of type &", | |
02a2406d | 3888 | N, Comp); |
349db231 | 3889 | Error_Msg_NE |
02a2406d | 3890 | ("\which is a component of untagged type& in the profile " |
3891 | & "of primitive & of type % that is frozen by the " | |
3892 | & "declaration ", N, Typ); | |
349db231 | 3893 | end if; |
17e14451 | 3894 | end if; |
3895 | end Check_Premature_Freezing; | |
3896 | ||
24971415 | 3897 | --------------- |
3898 | -- Export_DT -- | |
3899 | --------------- | |
3900 | ||
f301a57b | 3901 | procedure Export_DT (Typ : Entity_Id; DT : Entity_Id; Index : Nat := 0) |
3902 | is | |
3903 | Count : Nat; | |
3904 | Elmt : Elmt_Id; | |
3905 | ||
24971415 | 3906 | begin |
3907 | Set_Is_Statically_Allocated (DT); | |
3908 | Set_Is_True_Constant (DT); | |
3909 | Set_Is_Exported (DT); | |
3910 | ||
f301a57b | 3911 | Count := 0; |
3912 | Elmt := First_Elmt (Dispatch_Table_Wrappers (Typ)); | |
3913 | while Count /= Index loop | |
3914 | Next_Elmt (Elmt); | |
3915 | Count := Count + 1; | |
3916 | end loop; | |
3917 | ||
3918 | pragma Assert (Related_Type (Node (Elmt)) = Typ); | |
3919 | ||
f92da234 | 3920 | Get_External_Name (Node (Elmt)); |
24971415 | 3921 | Set_Interface_Name (DT, |
3922 | Make_String_Literal (Loc, | |
3923 | Strval => String_From_Name_Buffer)); | |
3924 | ||
3925 | -- Ensure proper Sprint output of this implicit importation | |
3926 | ||
3927 | Set_Is_Internal (DT); | |
3928 | Set_Is_Public (DT); | |
3929 | end Export_DT; | |
3930 | ||
725a69d2 | 3931 | ----------------------- |
3932 | -- Make_Secondary_DT -- | |
3933 | ----------------------- | |
ee6ba406 | 3934 | |
725a69d2 | 3935 | procedure Make_Secondary_DT |
acf97c11 | 3936 | (Typ : Entity_Id; |
3937 | Iface : Entity_Id; | |
9a666241 | 3938 | Iface_Comp : Node_Id; |
f301a57b | 3939 | Suffix_Index : Int; |
acf97c11 | 3940 | Num_Iface_Prims : Nat; |
3941 | Iface_DT_Ptr : Entity_Id; | |
3942 | Predef_Prims_Ptr : Entity_Id; | |
3943 | Build_Thunks : Boolean; | |
3944 | Result : List_Id) | |
725a69d2 | 3945 | is |
3946 | Loc : constant Source_Ptr := Sloc (Typ); | |
f301a57b | 3947 | Exporting_Table : constant Boolean := |
3948 | Building_Static_DT (Typ) | |
3949 | and then Suffix_Index > 0; | |
ec97ce79 | 3950 | Iface_DT : constant Entity_Id := Make_Temporary (Loc, 'T'); |
3951 | Predef_Prims : constant Entity_Id := Make_Temporary (Loc, 'R'); | |
725a69d2 | 3952 | DT_Constr_List : List_Id; |
3953 | DT_Aggr_List : List_Id; | |
3954 | Empty_DT : Boolean := False; | |
3955 | Nb_Predef_Prims : Nat := 0; | |
3956 | Nb_Prim : Nat; | |
3957 | New_Node : Node_Id; | |
3958 | OSD : Entity_Id; | |
3959 | OSD_Aggr_List : List_Id; | |
3960 | Pos : Nat; | |
3961 | Prim : Entity_Id; | |
3962 | Prim_Elmt : Elmt_Id; | |
3963 | Prim_Ops_Aggr_List : List_Id; | |
343d35dc | 3964 | |
725a69d2 | 3965 | begin |
17e14451 | 3966 | -- Handle cases in which we do not generate statically allocated |
3967 | -- dispatch tables. | |
343d35dc | 3968 | |
24971415 | 3969 | if not Building_Static_DT (Typ) then |
725a69d2 | 3970 | Set_Ekind (Predef_Prims, E_Variable); |
725a69d2 | 3971 | Set_Ekind (Iface_DT, E_Variable); |
343d35dc | 3972 | |
725a69d2 | 3973 | -- Statically allocated dispatch tables and related entities are |
3974 | -- constants. | |
343d35dc | 3975 | |
725a69d2 | 3976 | else |
3977 | Set_Ekind (Predef_Prims, E_Constant); | |
3978 | Set_Is_Statically_Allocated (Predef_Prims); | |
3979 | Set_Is_True_Constant (Predef_Prims); | |
343d35dc | 3980 | |
725a69d2 | 3981 | Set_Ekind (Iface_DT, E_Constant); |
3982 | Set_Is_Statically_Allocated (Iface_DT); | |
3983 | Set_Is_True_Constant (Iface_DT); | |
343d35dc | 3984 | end if; |
3985 | ||
f301a57b | 3986 | -- Calculate the number of slots of the dispatch table. If the number |
3987 | -- of primitives of Typ is 0 we reserve a dummy single entry for its | |
0c826ed4 | 3988 | -- DT because at run time the pointer to this dummy entry will be |
f301a57b | 3989 | -- used as the tag. |
68f95949 | 3990 | |
cdb1c38f | 3991 | if Num_Iface_Prims = 0 then |
725a69d2 | 3992 | Empty_DT := True; |
3993 | Nb_Prim := 1; | |
cdb1c38f | 3994 | else |
3995 | Nb_Prim := Num_Iface_Prims; | |
725a69d2 | 3996 | end if; |
76a1c25b | 3997 | |
725a69d2 | 3998 | -- Generate: |
952af0b9 | 3999 | |
725a69d2 | 4000 | -- Predef_Prims : Address_Array (1 .. Default_Prim_Ops_Count) := |
4001 | -- (predef-prim-op-thunk-1'address, | |
4002 | -- predef-prim-op-thunk-2'address, | |
4003 | -- ... | |
4004 | -- predef-prim-op-thunk-n'address); | |
4005 | -- for Predef_Prims'Alignment use Address'Alignment | |
952af0b9 | 4006 | |
725a69d2 | 4007 | -- Stage 1: Calculate the number of predefined primitives |
76a1c25b | 4008 | |
24971415 | 4009 | if not Building_Static_DT (Typ) then |
725a69d2 | 4010 | Nb_Predef_Prims := Max_Predef_Prims; |
4011 | else | |
4012 | Prim_Elmt := First_Elmt (Primitive_Operations (Typ)); | |
4013 | while Present (Prim_Elmt) loop | |
4014 | Prim := Node (Prim_Elmt); | |
aad6babd | 4015 | |
725a69d2 | 4016 | if Is_Predefined_Dispatching_Operation (Prim) |
4017 | and then not Is_Abstract_Subprogram (Prim) | |
4018 | then | |
4019 | Pos := UI_To_Int (DT_Position (Prim)); | |
aad6babd | 4020 | |
725a69d2 | 4021 | if Pos > Nb_Predef_Prims then |
4022 | Nb_Predef_Prims := Pos; | |
4023 | end if; | |
4024 | end if; | |
aad6babd | 4025 | |
725a69d2 | 4026 | Next_Elmt (Prim_Elmt); |
4027 | end loop; | |
4028 | end if; | |
aad6babd | 4029 | |
83d39cd3 | 4030 | if Generate_SCIL then |
4031 | Nb_Predef_Prims := 0; | |
4032 | end if; | |
4033 | ||
725a69d2 | 4034 | -- Stage 2: Create the thunks associated with the predefined |
4035 | -- primitives and save their entity to fill the aggregate. | |
ee6ba406 | 4036 | |
725a69d2 | 4037 | declare |
4038 | Prim_Table : array (Nat range 1 .. Nb_Predef_Prims) of Entity_Id; | |
cc60bd16 | 4039 | Decl : Node_Id; |
725a69d2 | 4040 | Thunk_Id : Entity_Id; |
4041 | Thunk_Code : Node_Id; | |
aad6babd | 4042 | |
725a69d2 | 4043 | begin |
4044 | Prim_Ops_Aggr_List := New_List; | |
4045 | Prim_Table := (others => Empty); | |
aad6babd | 4046 | |
cdb1c38f | 4047 | if Building_Static_DT (Typ) then |
4048 | Prim_Elmt := First_Elmt (Primitive_Operations (Typ)); | |
4049 | while Present (Prim_Elmt) loop | |
4050 | Prim := Node (Prim_Elmt); | |
aad6babd | 4051 | |
cdb1c38f | 4052 | if Is_Predefined_Dispatching_Operation (Prim) |
4053 | and then not Is_Abstract_Subprogram (Prim) | |
3f8cf2d2 | 4054 | and then not Is_Eliminated (Prim) |
83d39cd3 | 4055 | and then not Generate_SCIL |
cdb1c38f | 4056 | and then not Present (Prim_Table |
4057 | (UI_To_Int (DT_Position (Prim)))) | |
4058 | then | |
4059 | if not Build_Thunks then | |
4060 | Prim_Table (UI_To_Int (DT_Position (Prim))) := | |
4061 | Alias (Prim); | |
aad6babd | 4062 | |
cdb1c38f | 4063 | else |
fc2907f6 | 4064 | Expand_Interface_Thunk |
4065 | (Ultimate_Alias (Prim), Thunk_Id, Thunk_Code); | |
aad6babd | 4066 | |
cdb1c38f | 4067 | if Present (Thunk_Id) then |
4068 | Append_To (Result, Thunk_Code); | |
46532462 | 4069 | Prim_Table (UI_To_Int (DT_Position (Prim))) := |
4070 | Thunk_Id; | |
cdb1c38f | 4071 | end if; |
4072 | end if; | |
725a69d2 | 4073 | end if; |
aad6babd | 4074 | |
cdb1c38f | 4075 | Next_Elmt (Prim_Elmt); |
4076 | end loop; | |
4077 | end if; | |
aad6babd | 4078 | |
725a69d2 | 4079 | for J in Prim_Table'Range loop |
4080 | if Present (Prim_Table (J)) then | |
4081 | New_Node := | |
cc60bd16 | 4082 | Unchecked_Convert_To (RTE (RE_Prim_Ptr), |
acf97c11 | 4083 | Make_Attribute_Reference (Loc, |
83c6c069 | 4084 | Prefix => New_Occurrence_Of (Prim_Table (J), Loc), |
acf97c11 | 4085 | Attribute_Name => Name_Unrestricted_Access)); |
725a69d2 | 4086 | else |
cc60bd16 | 4087 | New_Node := Make_Null (Loc); |
725a69d2 | 4088 | end if; |
952af0b9 | 4089 | |
725a69d2 | 4090 | Append_To (Prim_Ops_Aggr_List, New_Node); |
4091 | end loop; | |
952af0b9 | 4092 | |
cc60bd16 | 4093 | New_Node := |
02a2406d | 4094 | Make_Aggregate (Loc, Expressions => Prim_Ops_Aggr_List); |
cc60bd16 | 4095 | |
4096 | -- Remember aggregates initializing dispatch tables | |
4097 | ||
4098 | Append_Elmt (New_Node, DT_Aggr); | |
4099 | ||
4100 | Decl := | |
4101 | Make_Subtype_Declaration (Loc, | |
ec97ce79 | 4102 | Defining_Identifier => Make_Temporary (Loc, 'S'), |
4103 | Subtype_Indication => | |
83c6c069 | 4104 | New_Occurrence_Of (RTE (RE_Address_Array), Loc)); |
cc60bd16 | 4105 | |
4106 | Append_To (Result, Decl); | |
4107 | ||
725a69d2 | 4108 | Append_To (Result, |
4109 | Make_Object_Declaration (Loc, | |
4110 | Defining_Identifier => Predef_Prims, | |
24971415 | 4111 | Constant_Present => Building_Static_DT (Typ), |
725a69d2 | 4112 | Aliased_Present => True, |
83c6c069 | 4113 | Object_Definition => New_Occurrence_Of |
cc60bd16 | 4114 | (Defining_Identifier (Decl), Loc), |
4115 | Expression => New_Node)); | |
aad6babd | 4116 | |
725a69d2 | 4117 | Append_To (Result, |
4118 | Make_Attribute_Definition_Clause (Loc, | |
83c6c069 | 4119 | Name => New_Occurrence_Of (Predef_Prims, Loc), |
725a69d2 | 4120 | Chars => Name_Alignment, |
4121 | Expression => | |
4122 | Make_Attribute_Reference (Loc, | |
4123 | Prefix => | |
83c6c069 | 4124 | New_Occurrence_Of (RTE (RE_Integer_Address), Loc), |
725a69d2 | 4125 | Attribute_Name => Name_Alignment))); |
4126 | end; | |
aad6babd | 4127 | |
725a69d2 | 4128 | -- Generate |
76a1c25b | 4129 | |
725a69d2 | 4130 | -- OSD : Ada.Tags.Object_Specific_Data (Nb_Prims) := |
4131 | -- (OSD_Table => (1 => <value>, | |
4132 | -- ... | |
4133 | -- N => <value>)); | |
76a1c25b | 4134 | |
725a69d2 | 4135 | -- Iface_DT : Dispatch_Table (Nb_Prims) := |
4136 | -- ([ Signature => <sig-value> ], | |
4137 | -- Tag_Kind => <tag_kind-value>, | |
4138 | -- Predef_Prims => Predef_Prims'Address, | |
4139 | -- Offset_To_Top => 0, | |
4140 | -- OSD => OSD'Address, | |
4141 | -- Prims_Ptr => (prim-op-1'address, | |
4142 | -- prim-op-2'address, | |
4143 | -- ... | |
4144 | -- prim-op-n'address)); | |
f301a57b | 4145 | -- for Iface_DT'Alignment use Address'Alignment; |
76a1c25b | 4146 | |
725a69d2 | 4147 | -- Stage 3: Initialize the discriminant and the record components |
aad6babd | 4148 | |
725a69d2 | 4149 | DT_Constr_List := New_List; |
4150 | DT_Aggr_List := New_List; | |
343d35dc | 4151 | |
4c5d0f70 | 4152 | -- Nb_Prim |
343d35dc | 4153 | |
4c5d0f70 | 4154 | Append_To (DT_Constr_List, Make_Integer_Literal (Loc, Nb_Prim)); |
4155 | Append_To (DT_Aggr_List, Make_Integer_Literal (Loc, Nb_Prim)); | |
343d35dc | 4156 | |
725a69d2 | 4157 | -- Signature |
343d35dc | 4158 | |
725a69d2 | 4159 | if RTE_Record_Component_Available (RE_Signature) then |
4160 | Append_To (DT_Aggr_List, | |
83c6c069 | 4161 | New_Occurrence_Of (RTE (RE_Secondary_DT), Loc)); |
725a69d2 | 4162 | end if; |
343d35dc | 4163 | |
725a69d2 | 4164 | -- Tag_Kind |
343d35dc | 4165 | |
725a69d2 | 4166 | if RTE_Record_Component_Available (RE_Tag_Kind) then |
4167 | Append_To (DT_Aggr_List, Tagged_Kind (Typ)); | |
4168 | end if; | |
aad6babd | 4169 | |
725a69d2 | 4170 | -- Predef_Prims |
aad6babd | 4171 | |
725a69d2 | 4172 | Append_To (DT_Aggr_List, |
4173 | Make_Attribute_Reference (Loc, | |
02a2406d | 4174 | Prefix => New_Occurrence_Of (Predef_Prims, Loc), |
725a69d2 | 4175 | Attribute_Name => Name_Address)); |
aad6babd | 4176 | |
9a666241 | 4177 | -- If the location of the component that references this secondary |
4178 | -- dispatch table is variable then we have not declared the internal | |
4179 | -- dummy object; the value of Offset_To_Top will be set by the init | |
4180 | -- subprogram. | |
aad6babd | 4181 | |
9a666241 | 4182 | if No (Dummy_Object) then |
4183 | Append_To (DT_Aggr_List, Make_Integer_Literal (Loc, 0)); | |
4184 | ||
4185 | else | |
4186 | Append_To (DT_Aggr_List, | |
4277e5bb | 4187 | Make_Op_Minus (Loc, |
4188 | Make_Attribute_Reference (Loc, | |
4189 | Prefix => | |
4190 | Make_Selected_Component (Loc, | |
4191 | Prefix => | |
4192 | New_Occurrence_Of (Dummy_Object, Loc), | |
4193 | Selector_Name => | |
4194 | New_Occurrence_Of (Iface_Comp, Loc)), | |
4195 | Attribute_Name => Name_Position))); | |
9a666241 | 4196 | end if; |
aad6babd | 4197 | |
725a69d2 | 4198 | -- Generate the Object Specific Data table required to dispatch calls |
4199 | -- through synchronized interfaces. | |
aad6babd | 4200 | |
725a69d2 | 4201 | if Empty_DT |
4202 | or else Is_Abstract_Type (Typ) | |
4203 | or else Is_Controlled (Typ) | |
4204 | or else Restriction_Active (No_Dispatching_Calls) | |
4205 | or else not Is_Limited_Type (Typ) | |
a652dd51 | 4206 | or else not Has_Interfaces (Typ) |
cdb1c38f | 4207 | or else not Build_Thunks |
38d2fa31 | 4208 | or else not RTE_Record_Component_Available (RE_OSD_Table) |
725a69d2 | 4209 | then |
4210 | -- No OSD table required | |
ee6ba406 | 4211 | |
725a69d2 | 4212 | Append_To (DT_Aggr_List, |
83c6c069 | 4213 | New_Occurrence_Of (RTE (RE_Null_Address), Loc)); |
d62940bf | 4214 | |
725a69d2 | 4215 | else |
4216 | OSD_Aggr_List := New_List; | |
d62940bf | 4217 | |
725a69d2 | 4218 | declare |
4219 | Prim_Table : array (Nat range 1 .. Nb_Prim) of Entity_Id; | |
4220 | Prim : Entity_Id; | |
4221 | Prim_Alias : Entity_Id; | |
4222 | Prim_Elmt : Elmt_Id; | |
4223 | E : Entity_Id; | |
4224 | Count : Nat := 0; | |
4225 | Pos : Nat; | |
d62940bf | 4226 | |
725a69d2 | 4227 | begin |
4228 | Prim_Table := (others => Empty); | |
4229 | Prim_Alias := Empty; | |
d62940bf | 4230 | |
725a69d2 | 4231 | Prim_Elmt := First_Elmt (Primitive_Operations (Typ)); |
4232 | while Present (Prim_Elmt) loop | |
4233 | Prim := Node (Prim_Elmt); | |
d62940bf | 4234 | |
a652dd51 | 4235 | if Present (Interface_Alias (Prim)) |
725a69d2 | 4236 | and then Find_Dispatching_Type |
a652dd51 | 4237 | (Interface_Alias (Prim)) = Iface |
725a69d2 | 4238 | then |
a652dd51 | 4239 | Prim_Alias := Interface_Alias (Prim); |
fc2907f6 | 4240 | E := Ultimate_Alias (Prim); |
725a69d2 | 4241 | Pos := UI_To_Int (DT_Position (Prim_Alias)); |
68f95949 | 4242 | |
725a69d2 | 4243 | if Present (Prim_Table (Pos)) then |
4244 | pragma Assert (Prim_Table (Pos) = E); | |
4245 | null; | |
68f95949 | 4246 | |
725a69d2 | 4247 | else |
4248 | Prim_Table (Pos) := E; | |
4249 | ||
4250 | Append_To (OSD_Aggr_List, | |
4251 | Make_Component_Association (Loc, | |
02a2406d | 4252 | Choices => New_List ( |
725a69d2 | 4253 | Make_Integer_Literal (Loc, |
4254 | DT_Position (Prim_Alias))), | |
4255 | Expression => | |
4256 | Make_Integer_Literal (Loc, | |
4257 | DT_Position (Alias (Prim))))); | |
4258 | ||
4259 | Count := Count + 1; | |
4260 | end if; | |
4261 | end if; | |
4262 | ||
4263 | Next_Elmt (Prim_Elmt); | |
4264 | end loop; | |
4265 | pragma Assert (Count = Nb_Prim); | |
4266 | end; | |
4267 | ||
ec97ce79 | 4268 | OSD := Make_Temporary (Loc, 'I'); |
725a69d2 | 4269 | |
4270 | Append_To (Result, | |
4271 | Make_Object_Declaration (Loc, | |
4272 | Defining_Identifier => OSD, | |
4273 | Object_Definition => | |
4274 | Make_Subtype_Indication (Loc, | |
4275 | Subtype_Mark => | |
83c6c069 | 4276 | New_Occurrence_Of (RTE (RE_Object_Specific_Data), Loc), |
02a2406d | 4277 | Constraint => |
725a69d2 | 4278 | Make_Index_Or_Discriminant_Constraint (Loc, |
4279 | Constraints => New_List ( | |
4280 | Make_Integer_Literal (Loc, Nb_Prim)))), | |
725a69d2 | 4281 | |
ec97ce79 | 4282 | Expression => |
4283 | Make_Aggregate (Loc, | |
4284 | Component_Associations => New_List ( | |
4285 | Make_Component_Association (Loc, | |
02a2406d | 4286 | Choices => New_List ( |
ec97ce79 | 4287 | New_Occurrence_Of |
4288 | (RTE_Record_Component (RE_OSD_Num_Prims), Loc)), | |
4289 | Expression => | |
4290 | Make_Integer_Literal (Loc, Nb_Prim)), | |
4291 | ||
4292 | Make_Component_Association (Loc, | |
02a2406d | 4293 | Choices => New_List ( |
ec97ce79 | 4294 | New_Occurrence_Of |
4295 | (RTE_Record_Component (RE_OSD_Table), Loc)), | |
4296 | Expression => Make_Aggregate (Loc, | |
4297 | Component_Associations => OSD_Aggr_List)))))); | |
725a69d2 | 4298 | |
17e14451 | 4299 | Append_To (Result, |
4300 | Make_Attribute_Definition_Clause (Loc, | |
83c6c069 | 4301 | Name => New_Occurrence_Of (OSD, Loc), |
17e14451 | 4302 | Chars => Name_Alignment, |
4303 | Expression => | |
4304 | Make_Attribute_Reference (Loc, | |
02a2406d | 4305 | Prefix => |
83c6c069 | 4306 | New_Occurrence_Of (RTE (RE_Integer_Address), Loc), |
17e14451 | 4307 | Attribute_Name => Name_Alignment))); |
4308 | ||
725a69d2 | 4309 | -- In secondary dispatch tables the Typeinfo component contains |
4310 | -- the address of the Object Specific Data (see a-tags.ads) | |
4311 | ||
4312 | Append_To (DT_Aggr_List, | |
4313 | Make_Attribute_Reference (Loc, | |
02a2406d | 4314 | Prefix => New_Occurrence_Of (OSD, Loc), |
725a69d2 | 4315 | Attribute_Name => Name_Address)); |
4316 | end if; | |
4317 | ||
4318 | -- Initialize the table of primitive operations | |
4319 | ||
4320 | Prim_Ops_Aggr_List := New_List; | |
4321 | ||
4322 | if Empty_DT then | |
cc60bd16 | 4323 | Append_To (Prim_Ops_Aggr_List, Make_Null (Loc)); |
725a69d2 | 4324 | |
4325 | elsif Is_Abstract_Type (Typ) | |
9a479e51 | 4326 | or else not Building_Static_DT (Typ) |
725a69d2 | 4327 | then |
4328 | for J in 1 .. Nb_Prim loop | |
cc60bd16 | 4329 | Append_To (Prim_Ops_Aggr_List, Make_Null (Loc)); |
725a69d2 | 4330 | end loop; |
4331 | ||
4332 | else | |
4333 | declare | |
d00681a7 | 4334 | CPP_Nb_Prims : constant Nat := CPP_Num_Prims (Typ); |
4335 | E : Entity_Id; | |
4336 | Prim_Pos : Nat; | |
4337 | Prim_Table : array (Nat range 1 .. Nb_Prim) of Entity_Id; | |
4338 | Thunk_Code : Node_Id; | |
4339 | Thunk_Id : Entity_Id; | |
725a69d2 | 4340 | |
4341 | begin | |
4342 | Prim_Table := (others => Empty); | |
4343 | ||
4344 | Prim_Elmt := First_Elmt (Primitive_Operations (Typ)); | |
4345 | while Present (Prim_Elmt) loop | |
d00681a7 | 4346 | Prim := Node (Prim_Elmt); |
4347 | E := Ultimate_Alias (Prim); | |
4348 | Prim_Pos := UI_To_Int (DT_Position (E)); | |
725a69d2 | 4349 | |
d00681a7 | 4350 | -- Do not reference predefined primitives because they are |
4351 | -- located in a separate dispatch table; skip abstract and | |
4352 | -- eliminated primitives; skip primitives located in the C++ | |
4353 | -- part of the dispatch table because their slot is set by | |
4354 | -- the IC routine. | |
3f8cf2d2 | 4355 | |
725a69d2 | 4356 | if not Is_Predefined_Dispatching_Operation (Prim) |
a652dd51 | 4357 | and then Present (Interface_Alias (Prim)) |
725a69d2 | 4358 | and then not Is_Abstract_Subprogram (Alias (Prim)) |
3f8cf2d2 | 4359 | and then not Is_Eliminated (Alias (Prim)) |
d00681a7 | 4360 | and then (not Is_CPP_Class (Root_Type (Typ)) |
4361 | or else Prim_Pos > CPP_Nb_Prims) | |
725a69d2 | 4362 | and then Find_Dispatching_Type |
a652dd51 | 4363 | (Interface_Alias (Prim)) = Iface |
725a69d2 | 4364 | |
4365 | -- Generate the code of the thunk only if the abstract | |
4366 | -- interface type is not an immediate ancestor of | |
d00681a7 | 4367 | -- Tagged_Type. Otherwise the DT associated with the |
725a69d2 | 4368 | -- interface is the primary DT. |
4369 | ||
cb4af01d | 4370 | and then not Is_Ancestor (Iface, Typ, |
4371 | Use_Full_View => True) | |
725a69d2 | 4372 | then |
cdb1c38f | 4373 | if not Build_Thunks then |
d00681a7 | 4374 | Prim_Pos := |
a652dd51 | 4375 | UI_To_Int (DT_Position (Interface_Alias (Prim))); |
d00681a7 | 4376 | Prim_Table (Prim_Pos) := Alias (Prim); |
4377 | ||
cdb1c38f | 4378 | else |
4379 | Expand_Interface_Thunk (Prim, Thunk_Id, Thunk_Code); | |
725a69d2 | 4380 | |
cdb1c38f | 4381 | if Present (Thunk_Id) then |
d00681a7 | 4382 | Prim_Pos := |
a652dd51 | 4383 | UI_To_Int (DT_Position (Interface_Alias (Prim))); |
cdb1c38f | 4384 | |
d00681a7 | 4385 | Prim_Table (Prim_Pos) := Thunk_Id; |
cdb1c38f | 4386 | Append_To (Result, Thunk_Code); |
4387 | end if; | |
725a69d2 | 4388 | end if; |
4389 | end if; | |
4390 | ||
4391 | Next_Elmt (Prim_Elmt); | |
4392 | end loop; | |
4393 | ||
4394 | for J in Prim_Table'Range loop | |
4395 | if Present (Prim_Table (J)) then | |
4396 | New_Node := | |
cc60bd16 | 4397 | Unchecked_Convert_To (RTE (RE_Prim_Ptr), |
acf97c11 | 4398 | Make_Attribute_Reference (Loc, |
83c6c069 | 4399 | Prefix => New_Occurrence_Of (Prim_Table (J), Loc), |
acf97c11 | 4400 | Attribute_Name => Name_Unrestricted_Access)); |
d00681a7 | 4401 | |
725a69d2 | 4402 | else |
cc60bd16 | 4403 | New_Node := Make_Null (Loc); |
725a69d2 | 4404 | end if; |
4405 | ||
4406 | Append_To (Prim_Ops_Aggr_List, New_Node); | |
4407 | end loop; | |
4408 | end; | |
4409 | end if; | |
4410 | ||
cc60bd16 | 4411 | New_Node := |
725a69d2 | 4412 | Make_Aggregate (Loc, |
cc60bd16 | 4413 | Expressions => Prim_Ops_Aggr_List); |
4414 | ||
4415 | Append_To (DT_Aggr_List, New_Node); | |
4416 | ||
4417 | -- Remember aggregates initializing dispatch tables | |
4418 | ||
4419 | Append_Elmt (New_Node, DT_Aggr); | |
725a69d2 | 4420 | |
9a666241 | 4421 | -- Note: Secondary dispatch tables are declared constant only if |
4422 | -- we can compute their offset field by means of the extra dummy | |
4423 | -- object; otherwise they cannot be declared constant and the | |
4424 | -- Offset_To_Top component is initialized by the IP routine. | |
f301a57b | 4425 | |
725a69d2 | 4426 | Append_To (Result, |
4427 | Make_Object_Declaration (Loc, | |
4428 | Defining_Identifier => Iface_DT, | |
4429 | Aliased_Present => True, | |
9a666241 | 4430 | Constant_Present => Present (Dummy_Object), |
f301a57b | 4431 | |
725a69d2 | 4432 | Object_Definition => |
4433 | Make_Subtype_Indication (Loc, | |
83c6c069 | 4434 | Subtype_Mark => New_Occurrence_Of |
725a69d2 | 4435 | (RTE (RE_Dispatch_Table_Wrapper), Loc), |
4436 | Constraint => Make_Index_Or_Discriminant_Constraint (Loc, | |
4437 | Constraints => DT_Constr_List)), | |
4438 | ||
f301a57b | 4439 | Expression => |
4440 | Make_Aggregate (Loc, | |
4441 | Expressions => DT_Aggr_List))); | |
725a69d2 | 4442 | |
17e14451 | 4443 | Append_To (Result, |
4444 | Make_Attribute_Definition_Clause (Loc, | |
83c6c069 | 4445 | Name => New_Occurrence_Of (Iface_DT, Loc), |
17e14451 | 4446 | Chars => Name_Alignment, |
f301a57b | 4447 | |
17e14451 | 4448 | Expression => |
4449 | Make_Attribute_Reference (Loc, | |
f301a57b | 4450 | Prefix => |
83c6c069 | 4451 | New_Occurrence_Of (RTE (RE_Integer_Address), Loc), |
17e14451 | 4452 | Attribute_Name => Name_Alignment))); |
4453 | ||
f301a57b | 4454 | if Exporting_Table then |
4455 | Export_DT (Typ, Iface_DT, Suffix_Index); | |
4456 | ||
725a69d2 | 4457 | -- Generate code to create the pointer to the dispatch table |
4458 | ||
f301a57b | 4459 | -- Iface_DT_Ptr : Tag := Tag!(DT.Prims_Ptr'Address); |
725a69d2 | 4460 | |
f301a57b | 4461 | -- Note: This declaration is not added here if the table is exported |
4462 | -- because in such case Make_Tags has already added this declaration. | |
4463 | ||
4464 | else | |
4465 | Append_To (Result, | |
4466 | Make_Object_Declaration (Loc, | |
4467 | Defining_Identifier => Iface_DT_Ptr, | |
4468 | Constant_Present => True, | |
4469 | ||
4470 | Object_Definition => | |
83c6c069 | 4471 | New_Occurrence_Of (RTE (RE_Interface_Tag), Loc), |
f301a57b | 4472 | |
4473 | Expression => | |
4474 | Unchecked_Convert_To (RTE (RE_Interface_Tag), | |
4475 | Make_Attribute_Reference (Loc, | |
4476 | Prefix => | |
4477 | Make_Selected_Component (Loc, | |
83c6c069 | 4478 | Prefix => New_Occurrence_Of (Iface_DT, Loc), |
f301a57b | 4479 | Selector_Name => |
4480 | New_Occurrence_Of | |
4481 | (RTE_Record_Component (RE_Prims_Ptr), Loc)), | |
4482 | Attribute_Name => Name_Address)))); | |
4483 | end if; | |
725a69d2 | 4484 | |
acf97c11 | 4485 | Append_To (Result, |
4486 | Make_Object_Declaration (Loc, | |
4487 | Defining_Identifier => Predef_Prims_Ptr, | |
4488 | Constant_Present => True, | |
f301a57b | 4489 | |
4490 | Object_Definition => | |
83c6c069 | 4491 | New_Occurrence_Of (RTE (RE_Address), Loc), |
f301a57b | 4492 | |
4493 | Expression => | |
acf97c11 | 4494 | Make_Attribute_Reference (Loc, |
f301a57b | 4495 | Prefix => |
acf97c11 | 4496 | Make_Selected_Component (Loc, |
83c6c069 | 4497 | Prefix => New_Occurrence_Of (Iface_DT, Loc), |
f301a57b | 4498 | Selector_Name => |
4499 | New_Occurrence_Of | |
4500 | (RTE_Record_Component (RE_Predef_Prims), Loc)), | |
acf97c11 | 4501 | Attribute_Name => Name_Address))); |
4502 | ||
cc60bd16 | 4503 | -- Remember entities containing dispatch tables |
acf97c11 | 4504 | |
cc60bd16 | 4505 | Append_Elmt (Predef_Prims, DT_Decl); |
4506 | Append_Elmt (Iface_DT, DT_Decl); | |
725a69d2 | 4507 | end Make_Secondary_DT; |
4508 | ||
4509 | -- Local variables | |
4510 | ||
72a98436 | 4511 | Elab_Code : constant List_Id := New_List; |
4512 | Result : constant List_Id := New_List; | |
4513 | Tname : constant Name_Id := Chars (Typ); | |
4514 | ||
cb0deab3 | 4515 | -- When pragmas Discard_Names and No_Tagged_Streams simultaneously apply |
4516 | -- we initialize the Expanded_Name and the External_Tag of this tagged | |
4517 | -- type with an empty string. This is useful to avoid exposing entity | |
4518 | -- names at binary level. It can be done when both pragmas apply because | |
4519 | -- (1) Discard_Names allows initializing Expanded_Name with an | |
4520 | -- implementation defined value (Ada RM Section C.5 (7/2)). | |
4521 | -- (2) External_Tag (combined with Internal_Tag) is used for object | |
4522 | -- streaming and No_Tagged_Streams inhibits the generation of | |
4523 | -- streams. | |
4524 | ||
4525 | Discard_Names : constant Boolean := | |
4526 | Present (No_Tagged_Streams_Pragma (Typ)) | |
4527 | and then (Global_Discard_Names | |
5abc6fac | 4528 | or else Einfo.Discard_Names (Typ)); |
cb0deab3 | 4529 | |
72a98436 | 4530 | -- The following name entries are used by Make_DT to generate a number |
4531 | -- of entities related to a tagged type. These entities may be generated | |
4532 | -- in a scope other than that of the tagged type declaration, and if | |
4533 | -- the entities for two tagged types with the same name happen to be | |
4534 | -- generated in the same scope, we have to take care to use different | |
4535 | -- names. This is achieved by means of a unique serial number appended | |
4536 | -- to each generated entity name. | |
4537 | ||
4538 | Name_DT : constant Name_Id := | |
4539 | New_External_Name (Tname, 'T', Suffix_Index => -1); | |
4540 | Name_Exname : constant Name_Id := | |
4541 | New_External_Name (Tname, 'E', Suffix_Index => -1); | |
4542 | Name_HT_Link : constant Name_Id := | |
4543 | New_External_Name (Tname, 'H', Suffix_Index => -1); | |
4544 | Name_Predef_Prims : constant Name_Id := | |
4545 | New_External_Name (Tname, 'R', Suffix_Index => -1); | |
4546 | Name_SSD : constant Name_Id := | |
4547 | New_External_Name (Tname, 'S', Suffix_Index => -1); | |
4548 | Name_TSD : constant Name_Id := | |
4549 | New_External_Name (Tname, 'B', Suffix_Index => -1); | |
4550 | ||
150bddeb | 4551 | Saved_GM : constant Ghost_Mode_Type := Ghost_Mode; |
4552 | Saved_IGR : constant Node_Id := Ignored_Ghost_Region; | |
4553 | -- Save the Ghost-related attributes to restore on exit | |
e02e4129 | 4554 | |
725a69d2 | 4555 | AI : Elmt_Id; |
cdb1c38f | 4556 | AI_Tag_Elmt : Elmt_Id; |
24971415 | 4557 | AI_Tag_Comp : Elmt_Id; |
72a98436 | 4558 | DT : Entity_Id; |
f9162257 | 4559 | DT_Aggr_List : List_Id; |
24971415 | 4560 | DT_Constr_List : List_Id; |
725a69d2 | 4561 | DT_Ptr : Entity_Id; |
cb0deab3 | 4562 | Exname : Entity_Id; |
72a98436 | 4563 | HT_Link : Entity_Id; |
725a69d2 | 4564 | ITable : Node_Id; |
4565 | I_Depth : Nat := 0; | |
4566 | Iface_Table_Node : Node_Id; | |
4567 | Name_ITable : Name_Id; | |
725a69d2 | 4568 | Nb_Predef_Prims : Nat := 0; |
4569 | Nb_Prim : Nat := 0; | |
4570 | New_Node : Node_Id; | |
725a69d2 | 4571 | Num_Ifaces : Nat := 0; |
cc60bd16 | 4572 | Parent_Typ : Entity_Id; |
72a98436 | 4573 | Predef_Prims : Entity_Id; |
725a69d2 | 4574 | Prim : Entity_Id; |
4575 | Prim_Elmt : Elmt_Id; | |
4576 | Prim_Ops_Aggr_List : List_Id; | |
72a98436 | 4577 | SSD : Entity_Id; |
725a69d2 | 4578 | Suffix_Index : Int; |
4579 | Typ_Comps : Elist_Id; | |
4580 | Typ_Ifaces : Elist_Id; | |
72a98436 | 4581 | TSD : Entity_Id; |
725a69d2 | 4582 | TSD_Aggr_List : List_Id; |
4583 | TSD_Tags_List : List_Id; | |
17e14451 | 4584 | |
725a69d2 | 4585 | -- Start of processing for Make_DT |
4586 | ||
4587 | begin | |
17e14451 | 4588 | pragma Assert (Is_Frozen (Typ)); |
725a69d2 | 4589 | |
30f8d103 | 4590 | -- The tagged type being processed may be subject to pragma Ghost. Set |
4591 | -- the mode now to ensure that any nodes generated during dispatch table | |
4592 | -- creation are properly marked as Ghost. | |
360b005f | 4593 | |
e02e4129 | 4594 | Set_Ghost_Mode (Typ); |
360b005f | 4595 | |
17e14451 | 4596 | -- Handle cases in which there is no need to build the dispatch table |
725a69d2 | 4597 | |
17e14451 | 4598 | if Has_Dispatch_Table (Typ) |
4599 | or else No (Access_Disp_Table (Typ)) | |
4600 | or else Is_CPP_Class (Typ) | |
4601 | then | |
72a98436 | 4602 | goto Leave; |
725a69d2 | 4603 | |
17e14451 | 4604 | elsif No_Run_Time_Mode then |
4605 | Error_Msg_CRT ("tagged types", Typ); | |
72a98436 | 4606 | goto Leave; |
725a69d2 | 4607 | |
17e14451 | 4608 | elsif not RTE_Available (RE_Tag) then |
725a69d2 | 4609 | Append_To (Result, |
4610 | Make_Object_Declaration (Loc, | |
72a98436 | 4611 | Defining_Identifier => |
4612 | Node (First_Elmt (Access_Disp_Table (Typ))), | |
83c6c069 | 4613 | Object_Definition => New_Occurrence_Of (RTE (RE_Tag), Loc), |
725a69d2 | 4614 | Constant_Present => True, |
4615 | Expression => | |
24971415 | 4616 | Unchecked_Convert_To (RTE (RE_Tag), |
83c6c069 | 4617 | New_Occurrence_Of (RTE (RE_Null_Address), Loc)))); |
725a69d2 | 4618 | |
4619 | Analyze_List (Result, Suppress => All_Checks); | |
4620 | Error_Msg_CRT ("tagged types", Typ); | |
72a98436 | 4621 | goto Leave; |
725a69d2 | 4622 | end if; |
4623 | ||
17e14451 | 4624 | -- Ensure that the value of Max_Predef_Prims defined in a-tags is |
208fd589 | 4625 | -- correct. Valid values are 9 under configurable runtime or 15 |
17e14451 | 4626 | -- with full runtime. |
4627 | ||
4628 | if RTE_Available (RE_Interface_Data) then | |
208fd589 | 4629 | if Max_Predef_Prims /= 15 then |
17e14451 | 4630 | Error_Msg_N ("run-time library configuration error", Typ); |
72a98436 | 4631 | goto Leave; |
17e14451 | 4632 | end if; |
725a69d2 | 4633 | else |
208fd589 | 4634 | if Max_Predef_Prims /= 9 then |
17e14451 | 4635 | Error_Msg_N ("run-time library configuration error", Typ); |
4636 | Error_Msg_CRT ("tagged types", Typ); | |
72a98436 | 4637 | goto Leave; |
17e14451 | 4638 | end if; |
725a69d2 | 4639 | end if; |
4640 | ||
cb0deab3 | 4641 | DT := Make_Defining_Identifier (Loc, Name_DT); |
4642 | Exname := Make_Defining_Identifier (Loc, Name_Exname); | |
4643 | HT_Link := Make_Defining_Identifier (Loc, Name_HT_Link); | |
4644 | Predef_Prims := Make_Defining_Identifier (Loc, Name_Predef_Prims); | |
4645 | SSD := Make_Defining_Identifier (Loc, Name_SSD); | |
4646 | TSD := Make_Defining_Identifier (Loc, Name_TSD); | |
72a98436 | 4647 | |
cc60bd16 | 4648 | -- Initialize Parent_Typ handling private types |
4649 | ||
4650 | Parent_Typ := Etype (Typ); | |
4651 | ||
4652 | if Present (Full_View (Parent_Typ)) then | |
4653 | Parent_Typ := Full_View (Parent_Typ); | |
4654 | end if; | |
4655 | ||
17e14451 | 4656 | -- Ensure that all the primitives are frozen. This is only required when |
4657 | -- building static dispatch tables --- the primitives must be frozen to | |
4658 | -- be referenced (otherwise we have problems with the backend). It is | |
4659 | -- not a requirement with nonstatic dispatch tables because in this case | |
4660 | -- we generate now an empty dispatch table; the extra code required to | |
24971415 | 4661 | -- register the primitives in the slots will be generated later --- when |
17e14451 | 4662 | -- each primitive is frozen (see Freeze_Subprogram). |
725a69d2 | 4663 | |
d00681a7 | 4664 | if Building_Static_DT (Typ) then |
17e14451 | 4665 | declare |
0d445a83 | 4666 | Saved_FLLTT : constant Boolean := |
4667 | Freezing_Library_Level_Tagged_Type; | |
4668 | ||
4669 | Formal : Entity_Id; | |
4670 | Frnodes : List_Id; | |
555c63a6 | 4671 | Prim : Entity_Id; |
17e14451 | 4672 | Prim_Elmt : Elmt_Id; |
725a69d2 | 4673 | |
17e14451 | 4674 | begin |
4675 | Freezing_Library_Level_Tagged_Type := True; | |
555c63a6 | 4676 | |
17e14451 | 4677 | Prim_Elmt := First_Elmt (Primitive_Operations (Typ)); |
4678 | while Present (Prim_Elmt) loop | |
555c63a6 | 4679 | Prim := Node (Prim_Elmt); |
d74fc39a | 4680 | Frnodes := Freeze_Entity (Prim, Typ); |
725a69d2 | 4681 | |
0d445a83 | 4682 | -- We disable this check for abstract subprograms, given that |
4683 | -- they cannot be called directly and thus the state of their | |
4684 | -- untagged formals is of no concern. The RM is unclear in any | |
4685 | -- case concerning the need for this check, and this topic may | |
4686 | -- go back to the ARG. | |
4687 | ||
4688 | if not Is_Abstract_Subprogram (Prim) then | |
4689 | Formal := First_Formal (Prim); | |
4690 | while Present (Formal) loop | |
4691 | Check_Premature_Freezing (Prim, Typ, Etype (Formal)); | |
4692 | Next_Formal (Formal); | |
17e14451 | 4693 | end loop; |
4694 | ||
349db231 | 4695 | Check_Premature_Freezing (Prim, Typ, Etype (Prim)); |
0d445a83 | 4696 | end if; |
17e14451 | 4697 | |
4698 | if Present (Frnodes) then | |
4699 | Append_List_To (Result, Frnodes); | |
4700 | end if; | |
4701 | ||
4702 | Next_Elmt (Prim_Elmt); | |
4703 | end loop; | |
555c63a6 | 4704 | |
0d445a83 | 4705 | Freezing_Library_Level_Tagged_Type := Saved_FLLTT; |
17e14451 | 4706 | end; |
4707 | end if; | |
725a69d2 | 4708 | |
9a666241 | 4709 | if Building_Static_Secondary_DT (Typ) then |
4710 | declare | |
4711 | Cannot_Have_Null_Disc : Boolean := False; | |
4712 | Name_Dummy_Object : constant Name_Id := | |
4713 | New_External_Name (Tname, | |
4714 | 'P', Suffix_Index => -1); | |
4715 | begin | |
4716 | Dummy_Object := Make_Defining_Identifier (Loc, Name_Dummy_Object); | |
4717 | ||
4718 | -- Define the extra object imported and constant to avoid linker | |
4719 | -- errors (since this object is never declared). Required because | |
4720 | -- we implement RM 13.3(19) for exported and imported (variable) | |
4721 | -- objects by making them volatile. | |
4722 | ||
4723 | Set_Is_Imported (Dummy_Object); | |
4724 | Set_Ekind (Dummy_Object, E_Constant); | |
4725 | Set_Is_True_Constant (Dummy_Object); | |
4726 | Set_Related_Type (Dummy_Object, Typ); | |
4727 | ||
4728 | -- The scope must be set now to call Get_External_Name | |
4729 | ||
4730 | Set_Scope (Dummy_Object, Current_Scope); | |
4731 | ||
4732 | Get_External_Name (Dummy_Object); | |
4733 | Set_Interface_Name (Dummy_Object, | |
4734 | Make_String_Literal (Loc, Strval => String_From_Name_Buffer)); | |
4735 | ||
4736 | -- Ensure proper Sprint output of this implicit importation | |
4737 | ||
4738 | Set_Is_Internal (Dummy_Object); | |
4739 | ||
4740 | if not Has_Discriminants (Typ) then | |
4741 | Append_To (Result, | |
4742 | Make_Object_Declaration (Loc, | |
4743 | Defining_Identifier => Dummy_Object, | |
4744 | Constant_Present => True, | |
4745 | Object_Definition => New_Occurrence_Of (Typ, Loc))); | |
4746 | else | |
4747 | declare | |
4748 | Constr_List : constant List_Id := New_List; | |
4749 | Discrim : Node_Id; | |
4750 | ||
4751 | begin | |
4752 | Discrim := First_Discriminant (Typ); | |
4753 | while Present (Discrim) loop | |
4754 | if Is_Discrete_Type (Etype (Discrim)) then | |
4755 | Append_To (Constr_List, | |
4756 | Make_Attribute_Reference (Loc, | |
b11290d7 | 4757 | Prefix => |
4758 | New_Occurrence_Of (Etype (Discrim), Loc), | |
9a666241 | 4759 | Attribute_Name => Name_First)); |
4760 | ||
4761 | else | |
4762 | pragma Assert (Is_Access_Type (Etype (Discrim))); | |
4763 | Cannot_Have_Null_Disc := | |
4764 | Cannot_Have_Null_Disc | |
4765 | or else Can_Never_Be_Null (Etype (Discrim)); | |
4766 | Append_To (Constr_List, Make_Null (Loc)); | |
4767 | end if; | |
4768 | ||
4769 | Next_Discriminant (Discrim); | |
4770 | end loop; | |
4771 | ||
4772 | Append_To (Result, | |
4773 | Make_Object_Declaration (Loc, | |
4774 | Defining_Identifier => Dummy_Object, | |
4775 | Constant_Present => True, | |
4776 | Object_Definition => | |
4777 | Make_Subtype_Indication (Loc, | |
4778 | Subtype_Mark => New_Occurrence_Of (Typ, Loc), | |
4779 | Constraint => | |
4780 | Make_Index_Or_Discriminant_Constraint (Loc, | |
4781 | Constraints => Constr_List)))); | |
4782 | end; | |
4783 | end if; | |
4784 | ||
4785 | -- Given that the dummy object will not be declared at run time, | |
4786 | -- analyze its declaration with expansion disabled and warnings | |
4787 | -- and error messages ignored. | |
4788 | ||
4789 | Expander_Mode_Save_And_Set (False); | |
4790 | Ignore_Errors_Enable := Ignore_Errors_Enable + 1; | |
4791 | Analyze (Last (Result), Suppress => All_Checks); | |
4792 | Ignore_Errors_Enable := Ignore_Errors_Enable - 1; | |
4793 | Expander_Mode_Restore; | |
4794 | end; | |
4795 | end if; | |
4796 | ||
17e14451 | 4797 | -- Ada 2005 (AI-251): Build the secondary dispatch tables |
4798 | ||
a652dd51 | 4799 | if Has_Interfaces (Typ) then |
17e14451 | 4800 | Collect_Interface_Components (Typ, Typ_Comps); |
4801 | ||
f301a57b | 4802 | -- Each secondary dispatch table is assigned an unique positive |
4803 | -- suffix index; such value also corresponds with the location of | |
4804 | -- its entity in the Dispatch_Table_Wrappers list (see Make_Tags). | |
4805 | ||
4806 | -- Note: This value must be kept sync with the Suffix_Index values | |
4807 | -- generated by Make_Tags | |
4808 | ||
4809 | Suffix_Index := 1; | |
acf97c11 | 4810 | AI_Tag_Elmt := |
4811 | Next_Elmt (Next_Elmt (First_Elmt (Access_Disp_Table (Typ)))); | |
17e14451 | 4812 | |
4813 | AI_Tag_Comp := First_Elmt (Typ_Comps); | |
4814 | while Present (AI_Tag_Comp) loop | |
d00681a7 | 4815 | pragma Assert (Has_Suffix (Node (AI_Tag_Elmt), 'P')); |
cdb1c38f | 4816 | |
4817 | -- Build the secondary table containing pointers to thunks | |
4818 | ||
17e14451 | 4819 | Make_Secondary_DT |
02a2406d | 4820 | (Typ => Typ, |
b11290d7 | 4821 | Iface => |
4822 | Base_Type (Related_Type (Node (AI_Tag_Comp))), | |
9a666241 | 4823 | Iface_Comp => Node (AI_Tag_Comp), |
02a2406d | 4824 | Suffix_Index => Suffix_Index, |
b11290d7 | 4825 | Num_Iface_Prims => |
4826 | UI_To_Int (DT_Entry_Count (Node (AI_Tag_Comp))), | |
02a2406d | 4827 | Iface_DT_Ptr => Node (AI_Tag_Elmt), |
acf97c11 | 4828 | Predef_Prims_Ptr => Node (Next_Elmt (AI_Tag_Elmt)), |
02a2406d | 4829 | Build_Thunks => True, |
4830 | Result => Result); | |
cdb1c38f | 4831 | |
d00681a7 | 4832 | -- Skip secondary dispatch table referencing thunks to predefined |
4833 | -- primitives. | |
acf97c11 | 4834 | |
f301a57b | 4835 | Next_Elmt (AI_Tag_Elmt); |
d00681a7 | 4836 | pragma Assert (Has_Suffix (Node (AI_Tag_Elmt), 'Y')); |
4837 | ||
4838 | -- Secondary dispatch table referencing user-defined primitives | |
4839 | -- covered by this interface. | |
4840 | ||
acf97c11 | 4841 | Next_Elmt (AI_Tag_Elmt); |
d00681a7 | 4842 | pragma Assert (Has_Suffix (Node (AI_Tag_Elmt), 'D')); |
acf97c11 | 4843 | |
36b938a3 | 4844 | -- Build the secondary table containing pointers to primitives |
cdb1c38f | 4845 | -- (used to give support to Generic Dispatching Constructors). |
4846 | ||
4847 | Make_Secondary_DT | |
d00681a7 | 4848 | (Typ => Typ, |
4849 | Iface => Base_Type | |
4850 | (Related_Type (Node (AI_Tag_Comp))), | |
9a666241 | 4851 | Iface_Comp => Node (AI_Tag_Comp), |
d00681a7 | 4852 | Suffix_Index => -1, |
4853 | Num_Iface_Prims => UI_To_Int | |
4854 | (DT_Entry_Count (Node (AI_Tag_Comp))), | |
4855 | Iface_DT_Ptr => Node (AI_Tag_Elmt), | |
4856 | Predef_Prims_Ptr => Node (Next_Elmt (AI_Tag_Elmt)), | |
4857 | Build_Thunks => False, | |
4858 | Result => Result); | |
4859 | ||
4860 | -- Skip secondary dispatch table referencing predefined primitives | |
acf97c11 | 4861 | |
f301a57b | 4862 | Next_Elmt (AI_Tag_Elmt); |
d00681a7 | 4863 | pragma Assert (Has_Suffix (Node (AI_Tag_Elmt), 'Z')); |
acf97c11 | 4864 | |
17e14451 | 4865 | Suffix_Index := Suffix_Index + 1; |
d00681a7 | 4866 | Next_Elmt (AI_Tag_Elmt); |
17e14451 | 4867 | Next_Elmt (AI_Tag_Comp); |
4868 | end loop; | |
4869 | end if; | |
725a69d2 | 4870 | |
c6a30f24 | 4871 | -- Get the _tag entity and number of primitives of its dispatch table |
725a69d2 | 4872 | |
24971415 | 4873 | DT_Ptr := Node (First_Elmt (Access_Disp_Table (Typ))); |
4874 | Nb_Prim := UI_To_Int (DT_Entry_Count (First_Tag_Component (Typ))); | |
725a69d2 | 4875 | |
83d39cd3 | 4876 | if Generate_SCIL then |
4877 | Nb_Prim := 0; | |
4878 | end if; | |
4879 | ||
2ea346ac | 4880 | Set_Is_Statically_Allocated (DT, Is_Library_Level_Tagged_Type (Typ)); |
4881 | Set_Is_Statically_Allocated (SSD, Is_Library_Level_Tagged_Type (Typ)); | |
4882 | Set_Is_Statically_Allocated (TSD, Is_Library_Level_Tagged_Type (Typ)); | |
4883 | Set_Is_Statically_Allocated (Predef_Prims, | |
4884 | Is_Library_Level_Tagged_Type (Typ)); | |
725a69d2 | 4885 | |
4886 | -- In case of locally defined tagged type we declare the object | |
36b938a3 | 4887 | -- containing the dispatch table by means of a variable. Its |
725a69d2 | 4888 | -- initialization is done later by means of an assignment. This is |
4889 | -- required to generate its External_Tag. | |
4890 | ||
24971415 | 4891 | if not Building_Static_DT (Typ) then |
725a69d2 | 4892 | |
4893 | -- Generate: | |
4894 | -- DT : No_Dispatch_Table_Wrapper; | |
17e14451 | 4895 | -- for DT'Alignment use Address'Alignment; |
725a69d2 | 4896 | -- DT_Ptr : Tag := !Tag (DT.NDT_Prims_Ptr'Address); |
4897 | ||
24971415 | 4898 | if not Has_DT (Typ) then |
725a69d2 | 4899 | Append_To (Result, |
4900 | Make_Object_Declaration (Loc, | |
4901 | Defining_Identifier => DT, | |
4902 | Aliased_Present => True, | |
4903 | Constant_Present => False, | |
4904 | Object_Definition => | |
83c6c069 | 4905 | New_Occurrence_Of |
725a69d2 | 4906 | (RTE (RE_No_Dispatch_Table_Wrapper), Loc))); |
4907 | ||
17e14451 | 4908 | Append_To (Result, |
4909 | Make_Attribute_Definition_Clause (Loc, | |
83c6c069 | 4910 | Name => New_Occurrence_Of (DT, Loc), |
17e14451 | 4911 | Chars => Name_Alignment, |
4912 | Expression => | |
4913 | Make_Attribute_Reference (Loc, | |
02a2406d | 4914 | Prefix => |
83c6c069 | 4915 | New_Occurrence_Of (RTE (RE_Integer_Address), Loc), |
17e14451 | 4916 | Attribute_Name => Name_Alignment))); |
4917 | ||
725a69d2 | 4918 | Append_To (Result, |
4919 | Make_Object_Declaration (Loc, | |
4920 | Defining_Identifier => DT_Ptr, | |
83c6c069 | 4921 | Object_Definition => New_Occurrence_Of (RTE (RE_Tag), Loc), |
725a69d2 | 4922 | Constant_Present => True, |
4923 | Expression => | |
24971415 | 4924 | Unchecked_Convert_To (RTE (RE_Tag), |
725a69d2 | 4925 | Make_Attribute_Reference (Loc, |
02a2406d | 4926 | Prefix => |
725a69d2 | 4927 | Make_Selected_Component (Loc, |
02a2406d | 4928 | Prefix => New_Occurrence_Of (DT, Loc), |
4929 | Selector_Name => | |
4930 | New_Occurrence_Of | |
4931 | (RTE_Record_Component (RE_NDT_Prims_Ptr), Loc)), | |
725a69d2 | 4932 | Attribute_Name => Name_Address)))); |
4933 | ||
ff6293ec | 4934 | Set_Is_Statically_Allocated (DT_Ptr, |
4935 | Is_Library_Level_Tagged_Type (Typ)); | |
4936 | ||
98045ff0 | 4937 | -- Generate the SCIL node for the previous object declaration |
4938 | -- because it has a tag initialization. | |
4939 | ||
3dbca0d5 | 4940 | if Generate_SCIL then |
d215f619 | 4941 | New_Node := |
4942 | Make_SCIL_Dispatch_Table_Tag_Init (Sloc (Last (Result))); | |
d215f619 | 4943 | Set_SCIL_Entity (New_Node, Typ); |
5a44b136 | 4944 | Set_SCIL_Node (Last (Result), New_Node); |
83d39cd3 | 4945 | |
72a98436 | 4946 | goto Leave_SCIL; |
83d39cd3 | 4947 | |
4948 | -- Gnat2scil has its own implementation of dispatch tables, | |
4949 | -- different than what is being implemented here. Generating | |
4950 | -- further dispatch table initialization code would just | |
4951 | -- cause gnat2scil to generate useless Scil which CodePeer | |
4952 | -- would waste time and space analyzing, so we skip it. | |
3dbca0d5 | 4953 | end if; |
4954 | ||
725a69d2 | 4955 | -- Generate: |
4956 | -- DT : Dispatch_Table_Wrapper (Nb_Prim); | |
4957 | -- for DT'Alignment use Address'Alignment; | |
4958 | -- DT_Ptr : Tag := !Tag (DT.Prims_Ptr'Address); | |
4959 | ||
4960 | else | |
4961 | -- If the tagged type has no primitives we add a dummy slot | |
4962 | -- whose address will be the tag of this type. | |
4963 | ||
4964 | if Nb_Prim = 0 then | |
4965 | DT_Constr_List := | |
4966 | New_List (Make_Integer_Literal (Loc, 1)); | |
4967 | else | |
4968 | DT_Constr_List := | |
4969 | New_List (Make_Integer_Literal (Loc, Nb_Prim)); | |
4970 | end if; | |
4971 | ||
4972 | Append_To (Result, | |
4973 | Make_Object_Declaration (Loc, | |
4974 | Defining_Identifier => DT, | |
4975 | Aliased_Present => True, | |
4976 | Constant_Present => False, | |
4977 | Object_Definition => | |
4978 | Make_Subtype_Indication (Loc, | |
4979 | Subtype_Mark => | |
83c6c069 | 4980 | New_Occurrence_Of (RTE (RE_Dispatch_Table_Wrapper), Loc), |
02a2406d | 4981 | Constraint => |
4982 | Make_Index_Or_Discriminant_Constraint (Loc, | |
4983 | Constraints => DT_Constr_List)))); | |
725a69d2 | 4984 | |
4985 | Append_To (Result, | |
4986 | Make_Attribute_Definition_Clause (Loc, | |
83c6c069 | 4987 | Name => New_Occurrence_Of (DT, Loc), |
725a69d2 | 4988 | Chars => Name_Alignment, |
4989 | Expression => | |
4990 | Make_Attribute_Reference (Loc, | |
02a2406d | 4991 | Prefix => |
83c6c069 | 4992 | New_Occurrence_Of (RTE (RE_Integer_Address), Loc), |
725a69d2 | 4993 | Attribute_Name => Name_Alignment))); |
4994 | ||
4995 | Append_To (Result, | |
4996 | Make_Object_Declaration (Loc, | |
4997 | Defining_Identifier => DT_Ptr, | |
83c6c069 | 4998 | Object_Definition => New_Occurrence_Of (RTE (RE_Tag), Loc), |
725a69d2 | 4999 | Constant_Present => True, |
5000 | Expression => | |
24971415 | 5001 | Unchecked_Convert_To (RTE (RE_Tag), |
725a69d2 | 5002 | Make_Attribute_Reference (Loc, |
02a2406d | 5003 | Prefix => |
725a69d2 | 5004 | Make_Selected_Component (Loc, |
02a2406d | 5005 | Prefix => New_Occurrence_Of (DT, Loc), |
5006 | Selector_Name => | |
5007 | New_Occurrence_Of | |
5008 | (RTE_Record_Component (RE_Prims_Ptr), Loc)), | |
725a69d2 | 5009 | Attribute_Name => Name_Address)))); |
acf97c11 | 5010 | |
ff6293ec | 5011 | Set_Is_Statically_Allocated (DT_Ptr, |
5012 | Is_Library_Level_Tagged_Type (Typ)); | |
5013 | ||
98045ff0 | 5014 | -- Generate the SCIL node for the previous object declaration |
5015 | -- because it has a tag initialization. | |
9af28f61 | 5016 | |
3dbca0d5 | 5017 | if Generate_SCIL then |
d215f619 | 5018 | New_Node := |
5019 | Make_SCIL_Dispatch_Table_Tag_Init (Sloc (Last (Result))); | |
d215f619 | 5020 | Set_SCIL_Entity (New_Node, Typ); |
5a44b136 | 5021 | Set_SCIL_Node (Last (Result), New_Node); |
83d39cd3 | 5022 | |
72a98436 | 5023 | goto Leave_SCIL; |
83d39cd3 | 5024 | |
5025 | -- Gnat2scil has its own implementation of dispatch tables, | |
5026 | -- different than what is being implemented here. Generating | |
5027 | -- further dispatch table initialization code would just | |
5028 | -- cause gnat2scil to generate useless Scil which CodePeer | |
5029 | -- would waste time and space analyzing, so we skip it. | |
3dbca0d5 | 5030 | end if; |
5031 | ||
acf97c11 | 5032 | Append_To (Result, |
5033 | Make_Object_Declaration (Loc, | |
5034 | Defining_Identifier => | |
5035 | Node (Next_Elmt (First_Elmt (Access_Disp_Table (Typ)))), | |
5036 | Constant_Present => True, | |
02a2406d | 5037 | Object_Definition => |
5038 | New_Occurrence_Of (RTE (RE_Address), Loc), | |
eb3a419e | 5039 | Expression => |
acf97c11 | 5040 | Make_Attribute_Reference (Loc, |
02a2406d | 5041 | Prefix => |
acf97c11 | 5042 | Make_Selected_Component (Loc, |
02a2406d | 5043 | Prefix => New_Occurrence_Of (DT, Loc), |
5044 | Selector_Name => | |
5045 | New_Occurrence_Of | |
5046 | (RTE_Record_Component (RE_Predef_Prims), Loc)), | |
acf97c11 | 5047 | Attribute_Name => Name_Address))); |
725a69d2 | 5048 | end if; |
5049 | end if; | |
5050 | ||
cb0deab3 | 5051 | -- Generate: Expanded_Name : constant String := ""; |
f76c2b51 | 5052 | |
cb0deab3 | 5053 | if Discard_Names then |
f76c2b51 | 5054 | Append_To (Result, |
5055 | Make_Object_Declaration (Loc, | |
cb0deab3 | 5056 | Defining_Identifier => Exname, |
f76c2b51 | 5057 | Constant_Present => True, |
5058 | Object_Definition => New_Occurrence_Of (Standard_String, Loc), | |
5059 | Expression => | |
5060 | Make_String_Literal (Loc, ""))); | |
5061 | ||
cb0deab3 | 5062 | -- Generate: Exname : constant String := full_qualified_name (typ); |
343d35dc | 5063 | -- The type itself may be an anonymous parent type, so use the first |
5064 | -- subtype to have a user-recognizable name. | |
d62940bf | 5065 | |
f76c2b51 | 5066 | else |
5067 | Append_To (Result, | |
5068 | Make_Object_Declaration (Loc, | |
cb0deab3 | 5069 | Defining_Identifier => Exname, |
f76c2b51 | 5070 | Constant_Present => True, |
5071 | Object_Definition => New_Occurrence_Of (Standard_String, Loc), | |
5072 | Expression => | |
5073 | Make_String_Literal (Loc, | |
5074 | Fully_Qualified_Name_String (First_Subtype (Typ))))); | |
5075 | end if; | |
5076 | ||
cb0deab3 | 5077 | Set_Is_Statically_Allocated (Exname); |
5078 | Set_Is_True_Constant (Exname); | |
24971415 | 5079 | |
e7e688dd | 5080 | -- Declare the object used by Ada.Tags.Register_Tag |
5081 | ||
5082 | if RTE_Available (RE_Register_Tag) then | |
5083 | Append_To (Result, | |
5084 | Make_Object_Declaration (Loc, | |
5085 | Defining_Identifier => HT_Link, | |
c930fde5 | 5086 | Object_Definition => New_Occurrence_Of (RTE (RE_Tag), Loc), |
5087 | Expression => New_Occurrence_Of (RTE (RE_No_Tag), Loc))); | |
e7e688dd | 5088 | end if; |
5089 | ||
725a69d2 | 5090 | -- Generate code to create the storage for the type specific data object |
5091 | -- with enough space to store the tags of the ancestors plus the tags | |
5092 | -- of all the implemented interfaces (as described in a-tags.adb). | |
5093 | ||
5094 | -- TSD : Type_Specific_Data (I_Depth) := | |
5095 | -- (Idepth => I_Depth, | |
5096 | -- Access_Level => Type_Access_Level (Typ), | |
208fd589 | 5097 | -- Alignment => Typ'Alignment, |
cb0deab3 | 5098 | -- Expanded_Name => Cstring_Ptr!(Exname'Address)) |
5099 | -- External_Tag => Cstring_Ptr!(Exname'Address)) | |
e7e688dd | 5100 | -- HT_Link => HT_Link'Address, |
725a69d2 | 5101 | -- Transportable => <<boolean-value>>, |
835de585 | 5102 | -- Is_Abstract => <<boolean-value>>, |
bb3b440a | 5103 | -- Needs_Finalization => <<boolean-value>>, |
693b0822 | 5104 | -- [ Size_Func => Size_Prim'Access, ] |
5105 | -- [ Interfaces_Table => <<access-value>>, ] | |
24971415 | 5106 | -- [ SSD => SSD_Table'Address ] |
725a69d2 | 5107 | -- Tags_Table => (0 => null, |
5108 | -- 1 => Parent'Tag | |
5109 | -- ...); | |
5110 | -- for TSD'Alignment use Address'Alignment | |
5111 | ||
5112 | TSD_Aggr_List := New_List; | |
5113 | ||
5114 | -- Idepth: Count ancestors to compute the inheritance depth. For private | |
5115 | -- extensions, always go to the full view in order to compute the real | |
5116 | -- inheritance depth. | |
5117 | ||
5118 | declare | |
5119 | Current_Typ : Entity_Id; | |
5120 | Parent_Typ : Entity_Id; | |
5121 | ||
5122 | begin | |
5123 | I_Depth := 0; | |
5124 | Current_Typ := Typ; | |
5125 | loop | |
5126 | Parent_Typ := Etype (Current_Typ); | |
5127 | ||
5128 | if Is_Private_Type (Parent_Typ) then | |
5129 | Parent_Typ := Full_View (Base_Type (Parent_Typ)); | |
5130 | end if; | |
5131 | ||
5132 | exit when Parent_Typ = Current_Typ; | |
5133 | ||
5134 | I_Depth := I_Depth + 1; | |
5135 | Current_Typ := Parent_Typ; | |
5136 | end loop; | |
5137 | end; | |
5138 | ||
5139 | Append_To (TSD_Aggr_List, | |
17e14451 | 5140 | Make_Integer_Literal (Loc, I_Depth)); |
725a69d2 | 5141 | |
5142 | -- Access_Level | |
5143 | ||
5144 | Append_To (TSD_Aggr_List, | |
17e14451 | 5145 | Make_Integer_Literal (Loc, Type_Access_Level (Typ))); |
725a69d2 | 5146 | |
208fd589 | 5147 | -- Alignment |
5148 | ||
5149 | -- For CPP types we cannot rely on the value of 'Alignment provided | |
5150 | -- by the backend to initialize this TSD field. | |
5151 | ||
5152 | if Convention (Typ) = Convention_CPP | |
5153 | or else Is_CPP_Class (Root_Type (Typ)) | |
5154 | then | |
5155 | Append_To (TSD_Aggr_List, | |
5156 | Make_Integer_Literal (Loc, 0)); | |
5157 | else | |
5158 | Append_To (TSD_Aggr_List, | |
5159 | Make_Attribute_Reference (Loc, | |
02a2406d | 5160 | Prefix => New_Occurrence_Of (Typ, Loc), |
208fd589 | 5161 | Attribute_Name => Name_Alignment)); |
5162 | end if; | |
5163 | ||
725a69d2 | 5164 | -- Expanded_Name |
5165 | ||
5166 | Append_To (TSD_Aggr_List, | |
17e14451 | 5167 | Unchecked_Convert_To (RTE (RE_Cstring_Ptr), |
5168 | Make_Attribute_Reference (Loc, | |
cb0deab3 | 5169 | Prefix => New_Occurrence_Of (Exname, Loc), |
17e14451 | 5170 | Attribute_Name => Name_Address))); |
725a69d2 | 5171 | |
5172 | -- External_Tag of a local tagged type | |
5173 | ||
17e14451 | 5174 | -- <typ>A : constant String := |
725a69d2 | 5175 | -- "Internal tag at 16#tag-addr#: <full-name-of-typ>"; |
5176 | ||
5177 | -- The reason we generate this strange name is that we do not want to | |
5178 | -- enter local tagged types in the global hash table used to compute | |
5179 | -- the Internal_Tag attribute for two reasons: | |
5180 | ||
5181 | -- 1. It is hard to avoid a tasking race condition for entering the | |
5182 | -- entry into the hash table. | |
5183 | ||
5184 | -- 2. It would cause a storage leak, unless we rig up considerable | |
5185 | -- mechanism to remove the entry from the hash table on exit. | |
5186 | ||
5187 | -- So what we do is to generate the above external tag name, where the | |
5188 | -- hex address is the address of the local dispatch table (i.e. exactly | |
5189 | -- the value we want if Internal_Tag is computed from this string). | |
5190 | ||
5191 | -- Of course this value will only be valid if the tagged type is still | |
5192 | -- in scope, but it clearly must be erroneous to compute the internal | |
39a0c1d3 | 5193 | -- tag of a tagged type that is out of scope. |
725a69d2 | 5194 | |
17e14451 | 5195 | -- We don't do this processing if an explicit external tag has been |
5196 | -- specified. That's an odd case for which we have already issued a | |
5197 | -- warning, where we will not be able to compute the internal tag. | |
5198 | ||
cb0deab3 | 5199 | if not Discard_Names |
5200 | and then not Is_Library_Level_Entity (Typ) | |
17e14451 | 5201 | and then not Has_External_Tag_Rep_Clause (Typ) |
5202 | then | |
725a69d2 | 5203 | declare |
02a2406d | 5204 | Exname : constant Entity_Id := |
5205 | Make_Defining_Identifier (Loc, | |
5206 | Chars => New_External_Name (Tname, 'A')); | |
5207 | Full_Name : constant String_Id := | |
c6a30f24 | 5208 | Fully_Qualified_Name_String (First_Subtype (Typ)); |
02a2406d | 5209 | Str1_Id : String_Id; |
5210 | Str2_Id : String_Id; | |
725a69d2 | 5211 | |
5212 | begin | |
5213 | -- Generate: | |
17e14451 | 5214 | -- Str1 = "Internal tag at 16#"; |
725a69d2 | 5215 | |
5216 | Start_String; | |
5217 | Store_String_Chars ("Internal tag at 16#"); | |
5218 | Str1_Id := End_String; | |
5219 | ||
5220 | -- Generate: | |
17e14451 | 5221 | -- Str2 = "#: <type-full-name>"; |
725a69d2 | 5222 | |
5223 | Start_String; | |
5224 | Store_String_Chars ("#: "); | |
725a69d2 | 5225 | Store_String_Chars (Full_Name); |
17e14451 | 5226 | Str2_Id := End_String; |
725a69d2 | 5227 | |
5228 | -- Generate: | |
5229 | -- Exname : constant String := | |
17e14451 | 5230 | -- Str1 & Address_Image (Tag) & Str2; |
725a69d2 | 5231 | |
5232 | if RTE_Available (RE_Address_Image) then | |
5233 | Append_To (Result, | |
5234 | Make_Object_Declaration (Loc, | |
5235 | Defining_Identifier => Exname, | |
5236 | Constant_Present => True, | |
83c6c069 | 5237 | Object_Definition => New_Occurrence_Of |
725a69d2 | 5238 | (Standard_String, Loc), |
5239 | Expression => | |
5240 | Make_Op_Concat (Loc, | |
02a2406d | 5241 | Left_Opnd => Make_String_Literal (Loc, Str1_Id), |
725a69d2 | 5242 | Right_Opnd => |
5243 | Make_Op_Concat (Loc, | |
02a2406d | 5244 | Left_Opnd => |
725a69d2 | 5245 | Make_Function_Call (Loc, |
5246 | Name => | |
83c6c069 | 5247 | New_Occurrence_Of |
725a69d2 | 5248 | (RTE (RE_Address_Image), Loc), |
5249 | Parameter_Associations => New_List ( | |
5250 | Unchecked_Convert_To (RTE (RE_Address), | |
83c6c069 | 5251 | New_Occurrence_Of (DT_Ptr, Loc)))), |
725a69d2 | 5252 | Right_Opnd => |
17e14451 | 5253 | Make_String_Literal (Loc, Str2_Id))))); |
5254 | ||
f76c2b51 | 5255 | -- Generate: |
5256 | -- Exname : constant String := Str1 & Str2; | |
5257 | ||
725a69d2 | 5258 | else |
5259 | Append_To (Result, | |
5260 | Make_Object_Declaration (Loc, | |
5261 | Defining_Identifier => Exname, | |
5262 | Constant_Present => True, | |
02a2406d | 5263 | Object_Definition => |
5264 | New_Occurrence_Of (Standard_String, Loc), | |
5265 | Expression => | |
725a69d2 | 5266 | Make_Op_Concat (Loc, |
02a2406d | 5267 | Left_Opnd => Make_String_Literal (Loc, Str1_Id), |
5268 | Right_Opnd => Make_String_Literal (Loc, Str2_Id)))); | |
725a69d2 | 5269 | end if; |
5270 | ||
5271 | New_Node := | |
5272 | Unchecked_Convert_To (RTE (RE_Cstring_Ptr), | |
5273 | Make_Attribute_Reference (Loc, | |
02a2406d | 5274 | Prefix => New_Occurrence_Of (Exname, Loc), |
725a69d2 | 5275 | Attribute_Name => Name_Address)); |
5276 | end; | |
5277 | ||
5278 | -- External tag of a library-level tagged type: Check for a definition | |
5279 | -- of External_Tag. The clause is considered only if it applies to this | |
5280 | -- specific tagged type, as opposed to one of its ancestors. | |
cc60bd16 | 5281 | -- If the type is an unconstrained type extension, we are building the |
5282 | -- dispatch table of its anonymous base type, so the external tag, if | |
34fd8639 | 5283 | -- any was specified, must be retrieved from the first subtype. Go to |
5284 | -- the full view in case the clause is in the private part. | |
725a69d2 | 5285 | |
5286 | else | |
5287 | declare | |
cc60bd16 | 5288 | Def : constant Node_Id := Get_Attribute_Definition_Clause |
34fd8639 | 5289 | (Underlying_Type (First_Subtype (Typ)), |
cc60bd16 | 5290 | Attribute_External_Tag); |
5291 | ||
725a69d2 | 5292 | Old_Val : String_Id; |
5293 | New_Val : String_Id; | |
5294 | E : Entity_Id; | |
5295 | ||
5296 | begin | |
5297 | if not Present (Def) | |
cc60bd16 | 5298 | or else Entity (Name (Def)) /= First_Subtype (Typ) |
725a69d2 | 5299 | then |
5300 | New_Node := | |
5301 | Unchecked_Convert_To (RTE (RE_Cstring_Ptr), | |
5302 | Make_Attribute_Reference (Loc, | |
cb0deab3 | 5303 | Prefix => New_Occurrence_Of (Exname, Loc), |
725a69d2 | 5304 | Attribute_Name => Name_Address)); |
5305 | else | |
5306 | Old_Val := Strval (Expr_Value_S (Expression (Def))); | |
5307 | ||
17e14451 | 5308 | -- For the rep clause "for <typ>'external_tag use y" generate: |
725a69d2 | 5309 | |
17e14451 | 5310 | -- <typ>A : constant string := y; |
5311 | -- | |
5312 | -- <typ>A'Address is used to set the External_Tag component | |
5313 | -- of the TSD | |
725a69d2 | 5314 | |
5315 | -- Create a new nul terminated string if it is not already | |
5316 | ||
5317 | if String_Length (Old_Val) > 0 | |
5318 | and then | |
5319 | Get_String_Char (Old_Val, String_Length (Old_Val)) = 0 | |
5320 | then | |
5321 | New_Val := Old_Val; | |
5322 | else | |
5323 | Start_String (Old_Val); | |
5324 | Store_String_Char (Get_Char_Code (ASCII.NUL)); | |
5325 | New_Val := End_String; | |
5326 | end if; | |
5327 | ||
5328 | E := Make_Defining_Identifier (Loc, | |
5329 | New_External_Name (Chars (Typ), 'A')); | |
5330 | ||
5331 | Append_To (Result, | |
5332 | Make_Object_Declaration (Loc, | |
5333 | Defining_Identifier => E, | |
5334 | Constant_Present => True, | |
5335 | Object_Definition => | |
83c6c069 | 5336 | New_Occurrence_Of (Standard_String, Loc), |
725a69d2 | 5337 | Expression => |
5338 | Make_String_Literal (Loc, New_Val))); | |
5339 | ||
5340 | New_Node := | |
5341 | Unchecked_Convert_To (RTE (RE_Cstring_Ptr), | |
5342 | Make_Attribute_Reference (Loc, | |
02a2406d | 5343 | Prefix => New_Occurrence_Of (E, Loc), |
725a69d2 | 5344 | Attribute_Name => Name_Address)); |
5345 | end if; | |
5346 | end; | |
5347 | end if; | |
5348 | ||
17e14451 | 5349 | Append_To (TSD_Aggr_List, New_Node); |
725a69d2 | 5350 | |
5351 | -- HT_Link | |
5352 | ||
e7e688dd | 5353 | if RTE_Available (RE_Register_Tag) then |
5354 | Append_To (TSD_Aggr_List, | |
5355 | Unchecked_Convert_To (RTE (RE_Tag_Ptr), | |
5356 | Make_Attribute_Reference (Loc, | |
02a2406d | 5357 | Prefix => New_Occurrence_Of (HT_Link, Loc), |
e7e688dd | 5358 | Attribute_Name => Name_Address))); |
d39570ea | 5359 | |
5360 | elsif RTE_Record_Component_Available (RE_HT_Link) then | |
e7e688dd | 5361 | Append_To (TSD_Aggr_List, |
5362 | Unchecked_Convert_To (RTE (RE_Tag_Ptr), | |
83c6c069 | 5363 | New_Occurrence_Of (RTE (RE_Null_Address), Loc))); |
e7e688dd | 5364 | end if; |
725a69d2 | 5365 | |
5366 | -- Transportable: Set for types that can be used in remote calls | |
5367 | -- with respect to E.4(18) legality rules. | |
5368 | ||
17e14451 | 5369 | declare |
5370 | Transportable : Entity_Id; | |
725a69d2 | 5371 | |
17e14451 | 5372 | begin |
5373 | Transportable := | |
5374 | Boolean_Literals | |
5375 | (Is_Pure (Typ) | |
5376 | or else Is_Shared_Passive (Typ) | |
5377 | or else | |
5378 | ((Is_Remote_Types (Typ) | |
02a2406d | 5379 | or else Is_Remote_Call_Interface (Typ)) |
17e14451 | 5380 | and then Original_View_In_Visible_Part (Typ)) |
5381 | or else not Comes_From_Source (Typ)); | |
5382 | ||
5383 | Append_To (TSD_Aggr_List, | |
5384 | New_Occurrence_Of (Transportable, Loc)); | |
5385 | end; | |
725a69d2 | 5386 | |
835de585 | 5387 | -- Is_Abstract (Ada 2012: AI05-0173). This functionality is not |
5388 | -- available in the HIE runtime. | |
3568e554 | 5389 | |
835de585 | 5390 | if RTE_Record_Component_Available (RE_Is_Abstract) then |
3568e554 | 5391 | declare |
835de585 | 5392 | Is_Abstract : Entity_Id; |
3568e554 | 5393 | begin |
835de585 | 5394 | Is_Abstract := Boolean_Literals (Is_Abstract_Type (Typ)); |
3568e554 | 5395 | Append_To (TSD_Aggr_List, |
835de585 | 5396 | New_Occurrence_Of (Is_Abstract, Loc)); |
3568e554 | 5397 | end; |
5398 | end if; | |
5399 | ||
bb3b440a | 5400 | -- Needs_Finalization: Set if the type is controlled or has controlled |
5401 | -- components. | |
952af0b9 | 5402 | |
17e14451 | 5403 | declare |
bb3b440a | 5404 | Needs_Fin : Entity_Id; |
17e14451 | 5405 | begin |
bb3b440a | 5406 | Needs_Fin := Boolean_Literals (Needs_Finalization (Typ)); |
5407 | Append_To (TSD_Aggr_List, New_Occurrence_Of (Needs_Fin, Loc)); | |
17e14451 | 5408 | end; |
725a69d2 | 5409 | |
cc60bd16 | 5410 | -- Size_Func |
5411 | ||
5412 | if RTE_Record_Component_Available (RE_Size_Func) then | |
925c2ba1 | 5413 | |
5414 | -- Initialize this field to Null_Address if we are not building | |
5415 | -- static dispatch tables static or if the size function is not | |
5416 | -- available. In the former case we cannot initialize this field | |
5417 | -- until the function is frozen and registered in the dispatch | |
5418 | -- table (see Register_Primitive). | |
5419 | ||
5420 | if not Building_Static_DT (Typ) or else not Has_DT (Typ) then | |
cc60bd16 | 5421 | Append_To (TSD_Aggr_List, |
5422 | Unchecked_Convert_To (RTE (RE_Size_Ptr), | |
83c6c069 | 5423 | New_Occurrence_Of (RTE (RE_Null_Address), Loc))); |
cc60bd16 | 5424 | |
5425 | else | |
5426 | declare | |
5427 | Prim_Elmt : Elmt_Id; | |
5428 | Prim : Entity_Id; | |
95c577d7 | 5429 | Size_Comp : Node_Id := Empty; |
cc60bd16 | 5430 | |
5431 | begin | |
5432 | Prim_Elmt := First_Elmt (Primitive_Operations (Typ)); | |
5433 | while Present (Prim_Elmt) loop | |
5434 | Prim := Node (Prim_Elmt); | |
5435 | ||
5436 | if Chars (Prim) = Name_uSize then | |
fc2907f6 | 5437 | Prim := Ultimate_Alias (Prim); |
cc60bd16 | 5438 | |
5439 | if Is_Abstract_Subprogram (Prim) then | |
fa6a6949 | 5440 | Size_Comp := |
cc60bd16 | 5441 | Unchecked_Convert_To (RTE (RE_Size_Ptr), |
83c6c069 | 5442 | New_Occurrence_Of (RTE (RE_Null_Address), Loc)); |
cc60bd16 | 5443 | else |
fa6a6949 | 5444 | Size_Comp := |
cc60bd16 | 5445 | Unchecked_Convert_To (RTE (RE_Size_Ptr), |
5446 | Make_Attribute_Reference (Loc, | |
02a2406d | 5447 | Prefix => New_Occurrence_Of (Prim, Loc), |
fa6a6949 | 5448 | Attribute_Name => Name_Unrestricted_Access)); |
cc60bd16 | 5449 | end if; |
5450 | ||
5451 | exit; | |
5452 | end if; | |
5453 | ||
5454 | Next_Elmt (Prim_Elmt); | |
5455 | end loop; | |
fa6a6949 | 5456 | |
5457 | pragma Assert (Present (Size_Comp)); | |
5458 | Append_To (TSD_Aggr_List, Size_Comp); | |
cc60bd16 | 5459 | end; |
5460 | end if; | |
5461 | end if; | |
5462 | ||
725a69d2 | 5463 | -- Interfaces_Table (required for AI-405) |
5464 | ||
5465 | if RTE_Record_Component_Available (RE_Interfaces_Table) then | |
5466 | ||
5467 | -- Count the number of interface types implemented by Typ | |
5468 | ||
a652dd51 | 5469 | Collect_Interfaces (Typ, Typ_Ifaces); |
725a69d2 | 5470 | |
5471 | AI := First_Elmt (Typ_Ifaces); | |
5472 | while Present (AI) loop | |
5473 | Num_Ifaces := Num_Ifaces + 1; | |
5474 | Next_Elmt (AI); | |
5475 | end loop; | |
952af0b9 | 5476 | |
343d35dc | 5477 | if Num_Ifaces = 0 then |
725a69d2 | 5478 | Iface_Table_Node := Make_Null (Loc); |
952af0b9 | 5479 | |
725a69d2 | 5480 | -- Generate the Interface_Table object |
343d35dc | 5481 | |
5482 | else | |
725a69d2 | 5483 | declare |
40771d7e | 5484 | TSD_Ifaces_List : constant List_Id := New_List; |
5485 | Elmt : Elmt_Id; | |
912e88cc | 5486 | Ifaces_List : Elist_Id := No_Elist; |
5487 | Ifaces_Comp_List : Elist_Id := No_Elist; | |
40771d7e | 5488 | Ifaces_Tag_List : Elist_Id; |
5489 | Offset_To_Top : Node_Id; | |
5490 | Sec_DT_Tag : Node_Id; | |
725a69d2 | 5491 | |
5492 | begin | |
40771d7e | 5493 | -- Collect interfaces information if we need to compute the |
5494 | -- offset to the top using the dummy object. | |
5495 | ||
5496 | if Present (Dummy_Object) then | |
5497 | Collect_Interfaces_Info (Typ, | |
5498 | Ifaces_List, Ifaces_Comp_List, Ifaces_Tag_List); | |
5499 | end if; | |
5500 | ||
725a69d2 | 5501 | AI := First_Elmt (Typ_Ifaces); |
5502 | while Present (AI) loop | |
cb4af01d | 5503 | if Is_Ancestor (Node (AI), Typ, Use_Full_View => True) then |
f7c9b330 | 5504 | Sec_DT_Tag := New_Occurrence_Of (DT_Ptr, Loc); |
5505 | ||
cdb1c38f | 5506 | else |
acf97c11 | 5507 | Elmt := |
5508 | Next_Elmt | |
5509 | (Next_Elmt (First_Elmt (Access_Disp_Table (Typ)))); | |
cdb1c38f | 5510 | pragma Assert (Has_Thunks (Node (Elmt))); |
5511 | ||
d00681a7 | 5512 | while Is_Tag (Node (Elmt)) |
f7c9b330 | 5513 | and then not |
5514 | Is_Ancestor (Node (AI), Related_Type (Node (Elmt)), | |
5515 | Use_Full_View => True) | |
cdb1c38f | 5516 | loop |
5517 | pragma Assert (Has_Thunks (Node (Elmt))); | |
5518 | Next_Elmt (Elmt); | |
acf97c11 | 5519 | pragma Assert (Has_Thunks (Node (Elmt))); |
5520 | Next_Elmt (Elmt); | |
5521 | pragma Assert (not Has_Thunks (Node (Elmt))); | |
5522 | Next_Elmt (Elmt); | |
cdb1c38f | 5523 | pragma Assert (not Has_Thunks (Node (Elmt))); |
5524 | Next_Elmt (Elmt); | |
5525 | end loop; | |
5526 | ||
5527 | pragma Assert (Ekind (Node (Elmt)) = E_Constant | |
acf97c11 | 5528 | and then not |
5529 | Has_Thunks (Node (Next_Elmt (Next_Elmt (Elmt))))); | |
f7c9b330 | 5530 | |
cdb1c38f | 5531 | Sec_DT_Tag := |
f7c9b330 | 5532 | New_Occurrence_Of |
5533 | (Node (Next_Elmt (Next_Elmt (Elmt))), Loc); | |
cdb1c38f | 5534 | end if; |
5535 | ||
40771d7e | 5536 | -- For static dispatch tables compute Offset_To_Top using |
5537 | -- the dummy object. | |
5538 | ||
5539 | if Present (Dummy_Object) then | |
5540 | declare | |
5541 | Iface : constant Node_Id := Node (AI); | |
5542 | Iface_Comp : Node_Id := Empty; | |
5543 | Iface_Comp_Elmt : Elmt_Id; | |
5544 | Iface_Elmt : Elmt_Id; | |
5545 | ||
5546 | begin | |
5547 | Iface_Elmt := First_Elmt (Ifaces_List); | |
5548 | Iface_Comp_Elmt := First_Elmt (Ifaces_Comp_List); | |
5549 | ||
5550 | while Present (Iface_Elmt) loop | |
5551 | if Node (Iface_Elmt) = Iface then | |
5552 | Iface_Comp := Node (Iface_Comp_Elmt); | |
5553 | exit; | |
5554 | end if; | |
5555 | ||
5556 | Next_Elmt (Iface_Elmt); | |
5557 | Next_Elmt (Iface_Comp_Elmt); | |
5558 | end loop; | |
f7c9b330 | 5559 | |
40771d7e | 5560 | pragma Assert (Present (Iface_Comp)); |
5561 | ||
5562 | Offset_To_Top := | |
5563 | Make_Op_Minus (Loc, | |
5564 | Make_Attribute_Reference (Loc, | |
5565 | Prefix => | |
5566 | Make_Selected_Component (Loc, | |
5567 | Prefix => | |
5568 | New_Occurrence_Of (Dummy_Object, Loc), | |
5569 | Selector_Name => | |
5570 | New_Occurrence_Of (Iface_Comp, Loc)), | |
5571 | Attribute_Name => Name_Position)); | |
5572 | end; | |
5573 | else | |
5574 | Offset_To_Top := Make_Integer_Literal (Loc, 0); | |
5575 | end if; | |
5576 | ||
17e14451 | 5577 | Append_To (TSD_Ifaces_List, |
f7c9b330 | 5578 | Make_Aggregate (Loc, |
5579 | Expressions => New_List ( | |
17e14451 | 5580 | |
5581 | -- Iface_Tag | |
5582 | ||
24971415 | 5583 | Unchecked_Convert_To (RTE (RE_Tag), |
83c6c069 | 5584 | New_Occurrence_Of |
725a69d2 | 5585 | (Node (First_Elmt (Access_Disp_Table (Node (AI)))), |
17e14451 | 5586 | Loc)), |
725a69d2 | 5587 | |
17e14451 | 5588 | -- Static_Offset_To_Top |
725a69d2 | 5589 | |
83c6c069 | 5590 | New_Occurrence_Of (Standard_True, Loc), |
725a69d2 | 5591 | |
17e14451 | 5592 | -- Offset_To_Top_Value |
5593 | ||
40771d7e | 5594 | Offset_To_Top, |
17e14451 | 5595 | |
5596 | -- Offset_To_Top_Func | |
5597 | ||
cdb1c38f | 5598 | Make_Null (Loc), |
5599 | ||
5600 | -- Secondary_DT | |
5601 | ||
f7c9b330 | 5602 | Unchecked_Convert_To (RTE (RE_Tag), Sec_DT_Tag)))); |
725a69d2 | 5603 | |
725a69d2 | 5604 | Next_Elmt (AI); |
5605 | end loop; | |
725a69d2 | 5606 | |
17e14451 | 5607 | Name_ITable := New_External_Name (Tname, 'I'); |
5608 | ITable := Make_Defining_Identifier (Loc, Name_ITable); | |
2ea346ac | 5609 | Set_Is_Statically_Allocated (ITable, |
5610 | Is_Library_Level_Tagged_Type (Typ)); | |
725a69d2 | 5611 | |
40771d7e | 5612 | -- The table of interfaces is constant if we are building a |
5613 | -- static dispatch table; otherwise is not constant because | |
5614 | -- its slots are filled at run time by the IP routine. | |
725a69d2 | 5615 | |
17e14451 | 5616 | Append_To (Result, |
5617 | Make_Object_Declaration (Loc, | |
5618 | Defining_Identifier => ITable, | |
5619 | Aliased_Present => True, | |
40771d7e | 5620 | Constant_Present => Present (Dummy_Object), |
17e14451 | 5621 | Object_Definition => |
5622 | Make_Subtype_Indication (Loc, | |
5623 | Subtype_Mark => | |
83c6c069 | 5624 | New_Occurrence_Of (RTE (RE_Interface_Data), Loc), |
02a2406d | 5625 | Constraint => |
5626 | Make_Index_Or_Discriminant_Constraint (Loc, | |
5627 | Constraints => New_List ( | |
5628 | Make_Integer_Literal (Loc, Num_Ifaces)))), | |
725a69d2 | 5629 | |
f7c9b330 | 5630 | Expression => |
5631 | Make_Aggregate (Loc, | |
5632 | Expressions => New_List ( | |
5633 | Make_Integer_Literal (Loc, Num_Ifaces), | |
5634 | Make_Aggregate (Loc, TSD_Ifaces_List))))); | |
725a69d2 | 5635 | |
17e14451 | 5636 | Append_To (Result, |
5637 | Make_Attribute_Definition_Clause (Loc, | |
83c6c069 | 5638 | Name => New_Occurrence_Of (ITable, Loc), |
17e14451 | 5639 | Chars => Name_Alignment, |
5640 | Expression => | |
5641 | Make_Attribute_Reference (Loc, | |
02a2406d | 5642 | Prefix => |
83c6c069 | 5643 | New_Occurrence_Of (RTE (RE_Integer_Address), Loc), |
17e14451 | 5644 | Attribute_Name => Name_Alignment))); |
725a69d2 | 5645 | |
17e14451 | 5646 | Iface_Table_Node := |
5647 | Make_Attribute_Reference (Loc, | |
83c6c069 | 5648 | Prefix => New_Occurrence_Of (ITable, Loc), |
17e14451 | 5649 | Attribute_Name => Name_Unchecked_Access); |
5650 | end; | |
725a69d2 | 5651 | end if; |
5652 | ||
17e14451 | 5653 | Append_To (TSD_Aggr_List, Iface_Table_Node); |
725a69d2 | 5654 | end if; |
5655 | ||
5656 | -- Generate the Select Specific Data table for synchronized types that | |
5657 | -- implement synchronized interfaces. The size of the table is | |
5658 | -- constrained by the number of non-predefined primitive operations. | |
5659 | ||
5660 | if RTE_Record_Component_Available (RE_SSD) then | |
de54c5ab | 5661 | if Ada_Version >= Ada_2005 |
24971415 | 5662 | and then Has_DT (Typ) |
725a69d2 | 5663 | and then Is_Concurrent_Record_Type (Typ) |
a652dd51 | 5664 | and then Has_Interfaces (Typ) |
725a69d2 | 5665 | and then Nb_Prim > 0 |
5666 | and then not Is_Abstract_Type (Typ) | |
5667 | and then not Is_Controlled (Typ) | |
5668 | and then not Restriction_Active (No_Dispatching_Calls) | |
f38c8084 | 5669 | and then not Restriction_Active (No_Select_Statements) |
725a69d2 | 5670 | then |
343d35dc | 5671 | Append_To (Result, |
5672 | Make_Object_Declaration (Loc, | |
725a69d2 | 5673 | Defining_Identifier => SSD, |
343d35dc | 5674 | Aliased_Present => True, |
5675 | Object_Definition => | |
5676 | Make_Subtype_Indication (Loc, | |
83c6c069 | 5677 | Subtype_Mark => New_Occurrence_Of ( |
725a69d2 | 5678 | RTE (RE_Select_Specific_Data), Loc), |
5679 | Constraint => | |
5680 | Make_Index_Or_Discriminant_Constraint (Loc, | |
5681 | Constraints => New_List ( | |
5682 | Make_Integer_Literal (Loc, Nb_Prim)))))); | |
5683 | ||
17e14451 | 5684 | Append_To (Result, |
5685 | Make_Attribute_Definition_Clause (Loc, | |
83c6c069 | 5686 | Name => New_Occurrence_Of (SSD, Loc), |
17e14451 | 5687 | Chars => Name_Alignment, |
5688 | Expression => | |
5689 | Make_Attribute_Reference (Loc, | |
02a2406d | 5690 | Prefix => |
83c6c069 | 5691 | New_Occurrence_Of (RTE (RE_Integer_Address), Loc), |
17e14451 | 5692 | Attribute_Name => Name_Alignment))); |
5693 | ||
725a69d2 | 5694 | -- This table is initialized by Make_Select_Specific_Data_Table, |
5695 | -- which calls Set_Entry_Index and Set_Prim_Op_Kind. | |
5696 | ||
5697 | Append_To (TSD_Aggr_List, | |
17e14451 | 5698 | Make_Attribute_Reference (Loc, |
02a2406d | 5699 | Prefix => New_Occurrence_Of (SSD, Loc), |
17e14451 | 5700 | Attribute_Name => Name_Unchecked_Access)); |
725a69d2 | 5701 | else |
17e14451 | 5702 | Append_To (TSD_Aggr_List, Make_Null (Loc)); |
343d35dc | 5703 | end if; |
952af0b9 | 5704 | end if; |
5705 | ||
725a69d2 | 5706 | -- Initialize the table of ancestor tags. In case of interface types |
5707 | -- this table is not needed. | |
d62940bf | 5708 | |
cc60bd16 | 5709 | TSD_Tags_List := New_List; |
952af0b9 | 5710 | |
cc60bd16 | 5711 | -- If we are not statically allocating the dispatch table then we must |
5712 | -- fill position 0 with null because we still have not generated the | |
5713 | -- tag of Typ. | |
343d35dc | 5714 | |
cc60bd16 | 5715 | if not Building_Static_DT (Typ) |
5716 | or else Is_Interface (Typ) | |
5717 | then | |
5718 | Append_To (TSD_Tags_List, | |
5719 | Unchecked_Convert_To (RTE (RE_Tag), | |
83c6c069 | 5720 | New_Occurrence_Of (RTE (RE_Null_Address), Loc))); |
343d35dc | 5721 | |
cc60bd16 | 5722 | -- Otherwise we can safely reference the tag |
343d35dc | 5723 | |
cc60bd16 | 5724 | else |
5725 | Append_To (TSD_Tags_List, | |
83c6c069 | 5726 | New_Occurrence_Of (DT_Ptr, Loc)); |
cc60bd16 | 5727 | end if; |
343d35dc | 5728 | |
cc60bd16 | 5729 | -- Fill the rest of the table with the tags of the ancestors |
343d35dc | 5730 | |
cc60bd16 | 5731 | declare |
5732 | Current_Typ : Entity_Id; | |
5733 | Parent_Typ : Entity_Id; | |
5734 | Pos : Nat; | |
725a69d2 | 5735 | |
cc60bd16 | 5736 | begin |
17e14451 | 5737 | Pos := 1; |
5738 | Current_Typ := Typ; | |
725a69d2 | 5739 | |
17e14451 | 5740 | loop |
5741 | Parent_Typ := Etype (Current_Typ); | |
343d35dc | 5742 | |
17e14451 | 5743 | if Is_Private_Type (Parent_Typ) then |
5744 | Parent_Typ := Full_View (Base_Type (Parent_Typ)); | |
5745 | end if; | |
5746 | ||
5747 | exit when Parent_Typ = Current_Typ; | |
5748 | ||
7ac0f4a5 | 5749 | if Is_CPP_Class (Parent_Typ) then |
5750 | ||
17e14451 | 5751 | -- The tags defined in the C++ side will be inherited when |
5752 | -- the object is constructed (Exp_Ch3.Build_Init_Procedure) | |
5753 | ||
5754 | Append_To (TSD_Tags_List, | |
5755 | Unchecked_Convert_To (RTE (RE_Tag), | |
83c6c069 | 5756 | New_Occurrence_Of (RTE (RE_Null_Address), Loc))); |
17e14451 | 5757 | else |
5758 | Append_To (TSD_Tags_List, | |
83c6c069 | 5759 | New_Occurrence_Of |
17e14451 | 5760 | (Node (First_Elmt (Access_Disp_Table (Parent_Typ))), |
5761 | Loc)); | |
5762 | end if; | |
5763 | ||
5764 | Pos := Pos + 1; | |
5765 | Current_Typ := Parent_Typ; | |
5766 | end loop; | |
5767 | ||
5768 | pragma Assert (Pos = I_Depth + 1); | |
5769 | end; | |
5770 | ||
5771 | Append_To (TSD_Aggr_List, | |
5772 | Make_Aggregate (Loc, | |
5773 | Expressions => TSD_Tags_List)); | |
343d35dc | 5774 | |
725a69d2 | 5775 | -- Build the TSD object |
343d35dc | 5776 | |
5777 | Append_To (Result, | |
5778 | Make_Object_Declaration (Loc, | |
5779 | Defining_Identifier => TSD, | |
5780 | Aliased_Present => True, | |
24971415 | 5781 | Constant_Present => Building_Static_DT (Typ), |
343d35dc | 5782 | Object_Definition => |
5783 | Make_Subtype_Indication (Loc, | |
83c6c069 | 5784 | Subtype_Mark => New_Occurrence_Of ( |
343d35dc | 5785 | RTE (RE_Type_Specific_Data), Loc), |
5786 | Constraint => | |
5787 | Make_Index_Or_Discriminant_Constraint (Loc, | |
5788 | Constraints => New_List ( | |
5789 | Make_Integer_Literal (Loc, I_Depth)))), | |
725a69d2 | 5790 | |
343d35dc | 5791 | Expression => Make_Aggregate (Loc, |
17e14451 | 5792 | Expressions => TSD_Aggr_List))); |
343d35dc | 5793 | |
24971415 | 5794 | Set_Is_True_Constant (TSD, Building_Static_DT (Typ)); |
5795 | ||
343d35dc | 5796 | Append_To (Result, |
5797 | Make_Attribute_Definition_Clause (Loc, | |
83c6c069 | 5798 | Name => New_Occurrence_Of (TSD, Loc), |
343d35dc | 5799 | Chars => Name_Alignment, |
5800 | Expression => | |
5801 | Make_Attribute_Reference (Loc, | |
02a2406d | 5802 | Prefix => |
5803 | New_Occurrence_Of (RTE (RE_Integer_Address), Loc), | |
343d35dc | 5804 | Attribute_Name => Name_Alignment))); |
5805 | ||
24971415 | 5806 | -- Initialize or declare the dispatch table object |
343d35dc | 5807 | |
24971415 | 5808 | if not Has_DT (Typ) then |
725a69d2 | 5809 | DT_Constr_List := New_List; |
5810 | DT_Aggr_List := New_List; | |
343d35dc | 5811 | |
725a69d2 | 5812 | -- Typeinfo |
952af0b9 | 5813 | |
725a69d2 | 5814 | New_Node := |
5815 | Make_Attribute_Reference (Loc, | |
02a2406d | 5816 | Prefix => New_Occurrence_Of (TSD, Loc), |
725a69d2 | 5817 | Attribute_Name => Name_Address); |
5818 | ||
5819 | Append_To (DT_Constr_List, New_Node); | |
5820 | Append_To (DT_Aggr_List, New_Copy (New_Node)); | |
5821 | Append_To (DT_Aggr_List, Make_Integer_Literal (Loc, 0)); | |
5822 | ||
5823 | -- In case of locally defined tagged types we have already declared | |
5824 | -- and uninitialized object for the dispatch table, which is now | |
24971415 | 5825 | -- initialized by means of the following assignment: |
5826 | ||
5827 | -- DT := (TSD'Address, 0); | |
725a69d2 | 5828 | |
24971415 | 5829 | if not Building_Static_DT (Typ) then |
725a69d2 | 5830 | Append_To (Result, |
5831 | Make_Assignment_Statement (Loc, | |
02a2406d | 5832 | Name => New_Occurrence_Of (DT, Loc), |
5833 | Expression => Make_Aggregate (Loc, DT_Aggr_List))); | |
725a69d2 | 5834 | |
24971415 | 5835 | -- In case of library level tagged types we declare and export now |
5836 | -- the constant object containing the dummy dispatch table. There | |
5837 | -- is no need to declare the tag here because it has been previously | |
5838 | -- declared by Make_Tags | |
5839 | ||
5840 | -- DT : aliased constant No_Dispatch_Table := | |
5841 | -- (NDT_TSD => TSD'Address; | |
5842 | -- NDT_Prims_Ptr => 0); | |
5843 | -- for DT'Alignment use Address'Alignment; | |
725a69d2 | 5844 | |
5845 | else | |
5846 | Append_To (Result, | |
5847 | Make_Object_Declaration (Loc, | |
5848 | Defining_Identifier => DT, | |
5849 | Aliased_Present => True, | |
17e14451 | 5850 | Constant_Present => True, |
725a69d2 | 5851 | Object_Definition => |
83c6c069 | 5852 | New_Occurrence_Of (RTE (RE_No_Dispatch_Table_Wrapper), Loc), |
02a2406d | 5853 | Expression => Make_Aggregate (Loc, DT_Aggr_List))); |
725a69d2 | 5854 | |
17e14451 | 5855 | Append_To (Result, |
5856 | Make_Attribute_Definition_Clause (Loc, | |
83c6c069 | 5857 | Name => New_Occurrence_Of (DT, Loc), |
17e14451 | 5858 | Chars => Name_Alignment, |
5859 | Expression => | |
5860 | Make_Attribute_Reference (Loc, | |
02a2406d | 5861 | Prefix => |
83c6c069 | 5862 | New_Occurrence_Of (RTE (RE_Integer_Address), Loc), |
17e14451 | 5863 | Attribute_Name => Name_Alignment))); |
5864 | ||
24971415 | 5865 | Export_DT (Typ, DT); |
725a69d2 | 5866 | end if; |
5867 | ||
5868 | -- Common case: Typ has a dispatch table | |
5869 | ||
5870 | -- Generate: | |
5871 | ||
5872 | -- Predef_Prims : Address_Array (1 .. Default_Prim_Ops_Count) := | |
5873 | -- (predef-prim-op-1'address, | |
5874 | -- predef-prim-op-2'address, | |
5875 | -- ... | |
5876 | -- predef-prim-op-n'address); | |
5877 | -- for Predef_Prims'Alignment use Address'Alignment | |
5878 | ||
5879 | -- DT : Dispatch_Table (Nb_Prims) := | |
5880 | -- (Signature => <sig-value>, | |
5881 | -- Tag_Kind => <tag_kind-value>, | |
5882 | -- Predef_Prims => Predef_Prims'First'Address, | |
5883 | -- Offset_To_Top => 0, | |
5884 | -- TSD => TSD'Address; | |
5885 | -- Prims_Ptr => (prim-op-1'address, | |
5886 | -- prim-op-2'address, | |
5887 | -- ... | |
5888 | -- prim-op-n'address)); | |
17e14451 | 5889 | -- for DT'Alignment use Address'Alignment |
725a69d2 | 5890 | |
5891 | else | |
5892 | declare | |
5893 | Pos : Nat; | |
5894 | ||
5895 | begin | |
24971415 | 5896 | if not Building_Static_DT (Typ) then |
725a69d2 | 5897 | Nb_Predef_Prims := Max_Predef_Prims; |
5898 | ||
5899 | else | |
5900 | Prim_Elmt := First_Elmt (Primitive_Operations (Typ)); | |
5901 | while Present (Prim_Elmt) loop | |
5902 | Prim := Node (Prim_Elmt); | |
5903 | ||
5904 | if Is_Predefined_Dispatching_Operation (Prim) | |
5905 | and then not Is_Abstract_Subprogram (Prim) | |
5906 | then | |
5907 | Pos := UI_To_Int (DT_Position (Prim)); | |
5908 | ||
5909 | if Pos > Nb_Predef_Prims then | |
5910 | Nb_Predef_Prims := Pos; | |
5911 | end if; | |
5912 | end if; | |
5913 | ||
5914 | Next_Elmt (Prim_Elmt); | |
5915 | end loop; | |
5916 | end if; | |
5917 | ||
5918 | declare | |
5919 | Prim_Table : array | |
5920 | (Nat range 1 .. Nb_Predef_Prims) of Entity_Id; | |
cc60bd16 | 5921 | Decl : Node_Id; |
725a69d2 | 5922 | E : Entity_Id; |
5923 | ||
5924 | begin | |
5925 | Prim_Ops_Aggr_List := New_List; | |
5926 | ||
5927 | Prim_Table := (others => Empty); | |
17e14451 | 5928 | |
cdb1c38f | 5929 | if Building_Static_DT (Typ) then |
5930 | Prim_Elmt := First_Elmt (Primitive_Operations (Typ)); | |
5931 | while Present (Prim_Elmt) loop | |
5932 | Prim := Node (Prim_Elmt); | |
725a69d2 | 5933 | |
cdb1c38f | 5934 | if Is_Predefined_Dispatching_Operation (Prim) |
5935 | and then not Is_Abstract_Subprogram (Prim) | |
3f8cf2d2 | 5936 | and then not Is_Eliminated (Prim) |
cdb1c38f | 5937 | and then not Present (Prim_Table |
5938 | (UI_To_Int (DT_Position (Prim)))) | |
5939 | then | |
fc2907f6 | 5940 | E := Ultimate_Alias (Prim); |
cdb1c38f | 5941 | pragma Assert (not Is_Abstract_Subprogram (E)); |
5942 | Prim_Table (UI_To_Int (DT_Position (Prim))) := E; | |
5943 | end if; | |
725a69d2 | 5944 | |
cdb1c38f | 5945 | Next_Elmt (Prim_Elmt); |
5946 | end loop; | |
5947 | end if; | |
725a69d2 | 5948 | |
5949 | for J in Prim_Table'Range loop | |
5950 | if Present (Prim_Table (J)) then | |
5951 | New_Node := | |
cc60bd16 | 5952 | Unchecked_Convert_To (RTE (RE_Prim_Ptr), |
acf97c11 | 5953 | Make_Attribute_Reference (Loc, |
02a2406d | 5954 | Prefix => |
5955 | New_Occurrence_Of (Prim_Table (J), Loc), | |
acf97c11 | 5956 | Attribute_Name => Name_Unrestricted_Access)); |
725a69d2 | 5957 | else |
cc60bd16 | 5958 | New_Node := Make_Null (Loc); |
725a69d2 | 5959 | end if; |
5960 | ||
5961 | Append_To (Prim_Ops_Aggr_List, New_Node); | |
5962 | end loop; | |
343d35dc | 5963 | |
cc60bd16 | 5964 | New_Node := |
5965 | Make_Aggregate (Loc, | |
5966 | Expressions => Prim_Ops_Aggr_List); | |
5967 | ||
5968 | Decl := | |
5969 | Make_Subtype_Declaration (Loc, | |
ec97ce79 | 5970 | Defining_Identifier => Make_Temporary (Loc, 'S'), |
5971 | Subtype_Indication => | |
83c6c069 | 5972 | New_Occurrence_Of (RTE (RE_Address_Array), Loc)); |
cc60bd16 | 5973 | |
5974 | Append_To (Result, Decl); | |
5975 | ||
68f95949 | 5976 | Append_To (Result, |
5977 | Make_Object_Declaration (Loc, | |
725a69d2 | 5978 | Defining_Identifier => Predef_Prims, |
68f95949 | 5979 | Aliased_Present => True, |
24971415 | 5980 | Constant_Present => Building_Static_DT (Typ), |
02a2406d | 5981 | Object_Definition => |
5982 | New_Occurrence_Of (Defining_Identifier (Decl), Loc), | |
cc60bd16 | 5983 | Expression => New_Node)); |
5984 | ||
5985 | -- Remember aggregates initializing dispatch tables | |
5986 | ||
5987 | Append_Elmt (New_Node, DT_Aggr); | |
725a69d2 | 5988 | |
5989 | Append_To (Result, | |
5990 | Make_Attribute_Definition_Clause (Loc, | |
83c6c069 | 5991 | Name => New_Occurrence_Of (Predef_Prims, Loc), |
725a69d2 | 5992 | Chars => Name_Alignment, |
5993 | Expression => | |
5994 | Make_Attribute_Reference (Loc, | |
02a2406d | 5995 | Prefix => |
83c6c069 | 5996 | New_Occurrence_Of (RTE (RE_Integer_Address), Loc), |
725a69d2 | 5997 | Attribute_Name => Name_Alignment))); |
5998 | end; | |
5999 | end; | |
6000 | ||
6001 | -- Stage 1: Initialize the discriminant and the record components | |
6002 | ||
6003 | DT_Constr_List := New_List; | |
6004 | DT_Aggr_List := New_List; | |
6005 | ||
6006 | -- Num_Prims. If the tagged type has no primitives we add a dummy | |
6007 | -- slot whose address will be the tag of this type. | |
6008 | ||
6009 | if Nb_Prim = 0 then | |
6010 | New_Node := Make_Integer_Literal (Loc, 1); | |
6011 | else | |
6012 | New_Node := Make_Integer_Literal (Loc, Nb_Prim); | |
6013 | end if; | |
6014 | ||
6015 | Append_To (DT_Constr_List, New_Node); | |
6016 | Append_To (DT_Aggr_List, New_Copy (New_Node)); | |
6017 | ||
6018 | -- Signature | |
6019 | ||
6020 | if RTE_Record_Component_Available (RE_Signature) then | |
6021 | Append_To (DT_Aggr_List, | |
83c6c069 | 6022 | New_Occurrence_Of (RTE (RE_Primary_DT), Loc)); |
725a69d2 | 6023 | end if; |
6024 | ||
6025 | -- Tag_Kind | |
6026 | ||
6027 | if RTE_Record_Component_Available (RE_Tag_Kind) then | |
6028 | Append_To (DT_Aggr_List, Tagged_Kind (Typ)); | |
6029 | end if; | |
6030 | ||
6031 | -- Predef_Prims | |
6032 | ||
6033 | Append_To (DT_Aggr_List, | |
6034 | Make_Attribute_Reference (Loc, | |
02a2406d | 6035 | Prefix => New_Occurrence_Of (Predef_Prims, Loc), |
725a69d2 | 6036 | Attribute_Name => Name_Address)); |
6037 | ||
6038 | -- Offset_To_Top | |
6039 | ||
cc60bd16 | 6040 | Append_To (DT_Aggr_List, Make_Integer_Literal (Loc, 0)); |
725a69d2 | 6041 | |
6042 | -- Typeinfo | |
6043 | ||
6044 | Append_To (DT_Aggr_List, | |
6045 | Make_Attribute_Reference (Loc, | |
02a2406d | 6046 | Prefix => New_Occurrence_Of (TSD, Loc), |
725a69d2 | 6047 | Attribute_Name => Name_Address)); |
6048 | ||
f117057b | 6049 | -- Stage 2: Initialize the table of user-defined primitive operations |
725a69d2 | 6050 | |
6051 | Prim_Ops_Aggr_List := New_List; | |
6052 | ||
6053 | if Nb_Prim = 0 then | |
cc60bd16 | 6054 | Append_To (Prim_Ops_Aggr_List, Make_Null (Loc)); |
725a69d2 | 6055 | |
9a479e51 | 6056 | elsif not Building_Static_DT (Typ) then |
725a69d2 | 6057 | for J in 1 .. Nb_Prim loop |
cc60bd16 | 6058 | Append_To (Prim_Ops_Aggr_List, Make_Null (Loc)); |
725a69d2 | 6059 | end loop; |
6060 | ||
6061 | else | |
6062 | declare | |
d00681a7 | 6063 | CPP_Nb_Prims : constant Nat := CPP_Num_Prims (Typ); |
6064 | E : Entity_Id; | |
6065 | Prim : Entity_Id; | |
6066 | Prim_Elmt : Elmt_Id; | |
6067 | Prim_Pos : Nat; | |
6068 | Prim_Table : array (Nat range 1 .. Nb_Prim) of Entity_Id; | |
725a69d2 | 6069 | |
6070 | begin | |
6071 | Prim_Table := (others => Empty); | |
cdb1c38f | 6072 | |
6073 | Prim_Elmt := First_Elmt (Primitive_Operations (Typ)); | |
725a69d2 | 6074 | while Present (Prim_Elmt) loop |
6075 | Prim := Node (Prim_Elmt); | |
6076 | ||
9429b6e9 | 6077 | -- Retrieve the ultimate alias of the primitive for proper |
6078 | -- handling of renamings and eliminated primitives. | |
6079 | ||
78f327e2 | 6080 | E := Ultimate_Alias (Prim); |
ed7f78d7 | 6081 | |
6082 | -- If the alias is not a primitive operation then Prim does | |
6083 | -- not rename another primitive, but rather an operation | |
6084 | -- declared elsewhere (e.g. in another scope) and therefore | |
6085 | -- Prim is a new primitive. | |
6086 | ||
6087 | if No (Find_Dispatching_Type (E)) then | |
6088 | E := Prim; | |
6089 | end if; | |
6090 | ||
d00681a7 | 6091 | Prim_Pos := UI_To_Int (DT_Position (E)); |
9429b6e9 | 6092 | |
f9e26ff7 | 6093 | -- Skip predefined primitives because they are located in a |
6094 | -- separate dispatch table. | |
725a69d2 | 6095 | |
3f8cf2d2 | 6096 | if not Is_Predefined_Dispatching_Operation (Prim) |
6097 | and then not Is_Predefined_Dispatching_Operation (E) | |
f9e26ff7 | 6098 | |
6099 | -- Skip entities with attribute Interface_Alias because | |
6100 | -- those are only required to build secondary dispatch | |
6101 | -- tables. | |
6102 | ||
3f8cf2d2 | 6103 | and then not Present (Interface_Alias (Prim)) |
f9e26ff7 | 6104 | |
6105 | -- Skip abstract and eliminated primitives | |
6106 | ||
3f8cf2d2 | 6107 | and then not Is_Abstract_Subprogram (E) |
3f8cf2d2 | 6108 | and then not Is_Eliminated (E) |
f9e26ff7 | 6109 | |
6110 | -- For derivations of CPP types skip primitives located in | |
6111 | -- the C++ part of the dispatch table because their slots | |
6112 | -- are initialized by the IC routine. | |
6113 | ||
d00681a7 | 6114 | and then (not Is_CPP_Class (Root_Type (Typ)) |
6115 | or else Prim_Pos > CPP_Nb_Prims) | |
f9e26ff7 | 6116 | |
6117 | -- Skip ignored Ghost subprograms as those will be removed | |
6118 | -- from the executable. | |
6119 | ||
6120 | and then not Is_Ignored_Ghost_Entity (E) | |
3f8cf2d2 | 6121 | then |
6122 | pragma Assert | |
6123 | (UI_To_Int (DT_Position (Prim)) <= Nb_Prim); | |
6124 | ||
6125 | Prim_Table (UI_To_Int (DT_Position (Prim))) := E; | |
725a69d2 | 6126 | end if; |
6127 | ||
6128 | Next_Elmt (Prim_Elmt); | |
6129 | end loop; | |
6130 | ||
6131 | for J in Prim_Table'Range loop | |
6132 | if Present (Prim_Table (J)) then | |
6133 | New_Node := | |
cc60bd16 | 6134 | Unchecked_Convert_To (RTE (RE_Prim_Ptr), |
acf97c11 | 6135 | Make_Attribute_Reference (Loc, |
02a2406d | 6136 | Prefix => |
6137 | New_Occurrence_Of (Prim_Table (J), Loc), | |
acf97c11 | 6138 | Attribute_Name => Name_Unrestricted_Access)); |
725a69d2 | 6139 | else |
cc60bd16 | 6140 | New_Node := Make_Null (Loc); |
725a69d2 | 6141 | end if; |
6142 | ||
6143 | Append_To (Prim_Ops_Aggr_List, New_Node); | |
6144 | end loop; | |
6145 | end; | |
6146 | end if; | |
6147 | ||
cc60bd16 | 6148 | New_Node := |
725a69d2 | 6149 | Make_Aggregate (Loc, |
cc60bd16 | 6150 | Expressions => Prim_Ops_Aggr_List); |
6151 | ||
6152 | Append_To (DT_Aggr_List, New_Node); | |
6153 | ||
6154 | -- Remember aggregates initializing dispatch tables | |
6155 | ||
6156 | Append_Elmt (New_Node, DT_Aggr); | |
725a69d2 | 6157 | |
6158 | -- In case of locally defined tagged types we have already declared | |
6159 | -- and uninitialized object for the dispatch table, which is now | |
6160 | -- initialized by means of an assignment. | |
6161 | ||
24971415 | 6162 | if not Building_Static_DT (Typ) then |
725a69d2 | 6163 | Append_To (Result, |
6164 | Make_Assignment_Statement (Loc, | |
02a2406d | 6165 | Name => New_Occurrence_Of (DT, Loc), |
6166 | Expression => Make_Aggregate (Loc, DT_Aggr_List))); | |
725a69d2 | 6167 | |
24971415 | 6168 | -- In case of library level tagged types we declare now and export |
6169 | -- the constant object containing the dispatch table. | |
725a69d2 | 6170 | |
6171 | else | |
6172 | Append_To (Result, | |
6173 | Make_Object_Declaration (Loc, | |
6174 | Defining_Identifier => DT, | |
6175 | Aliased_Present => True, | |
17e14451 | 6176 | Constant_Present => True, |
725a69d2 | 6177 | Object_Definition => |
6178 | Make_Subtype_Indication (Loc, | |
83c6c069 | 6179 | Subtype_Mark => New_Occurrence_Of |
725a69d2 | 6180 | (RTE (RE_Dispatch_Table_Wrapper), Loc), |
6181 | Constraint => Make_Index_Or_Discriminant_Constraint (Loc, | |
6182 | Constraints => DT_Constr_List)), | |
02a2406d | 6183 | Expression => Make_Aggregate (Loc, DT_Aggr_List))); |
725a69d2 | 6184 | |
6185 | Append_To (Result, | |
6186 | Make_Attribute_Definition_Clause (Loc, | |
83c6c069 | 6187 | Name => New_Occurrence_Of (DT, Loc), |
725a69d2 | 6188 | Chars => Name_Alignment, |
6189 | Expression => | |
6190 | Make_Attribute_Reference (Loc, | |
02a2406d | 6191 | Prefix => |
83c6c069 | 6192 | New_Occurrence_Of (RTE (RE_Integer_Address), Loc), |
725a69d2 | 6193 | Attribute_Name => Name_Alignment))); |
6194 | ||
24971415 | 6195 | Export_DT (Typ, DT); |
952af0b9 | 6196 | end if; |
76a1c25b | 6197 | end if; |
d62940bf | 6198 | |
f301a57b | 6199 | -- Initialize the table of ancestor tags if not building static |
6200 | -- dispatch table | |
725a69d2 | 6201 | |
24971415 | 6202 | if not Building_Static_DT (Typ) |
17e14451 | 6203 | and then not Is_Interface (Typ) |
725a69d2 | 6204 | and then not Is_CPP_Class (Typ) |
6205 | then | |
6206 | Append_To (Result, | |
6207 | Make_Assignment_Statement (Loc, | |
02a2406d | 6208 | Name => |
725a69d2 | 6209 | Make_Indexed_Component (Loc, |
02a2406d | 6210 | Prefix => |
725a69d2 | 6211 | Make_Selected_Component (Loc, |
02a2406d | 6212 | Prefix => New_Occurrence_Of (TSD, Loc), |
725a69d2 | 6213 | Selector_Name => |
83c6c069 | 6214 | New_Occurrence_Of |
725a69d2 | 6215 | (RTE_Record_Component (RE_Tags_Table), Loc)), |
6216 | Expressions => | |
6217 | New_List (Make_Integer_Literal (Loc, 0))), | |
6218 | ||
6219 | Expression => | |
83c6c069 | 6220 | New_Occurrence_Of |
725a69d2 | 6221 | (Node (First_Elmt (Access_Disp_Table (Typ))), Loc))); |
6222 | end if; | |
6223 | ||
f301a57b | 6224 | -- Inherit the dispatch tables of the parent. There is no need to |
6225 | -- inherit anything from the parent when building static dispatch tables | |
6226 | -- because the whole dispatch table (including inherited primitives) has | |
6227 | -- been already built. | |
acf97c11 | 6228 | |
9a479e51 | 6229 | if Building_Static_DT (Typ) then |
725a69d2 | 6230 | null; |
6231 | ||
af647dc7 | 6232 | -- If the ancestor is a CPP_Class type we inherit the dispatch tables |
6233 | -- in the init proc, and we don't need to fill them in here. | |
d62940bf | 6234 | |
cc60bd16 | 6235 | elsif Is_CPP_Class (Parent_Typ) then |
af647dc7 | 6236 | null; |
d62940bf | 6237 | |
acf97c11 | 6238 | -- Otherwise we fill in the dispatch tables here |
d62940bf | 6239 | |
af647dc7 | 6240 | else |
cc60bd16 | 6241 | if Typ /= Parent_Typ |
af647dc7 | 6242 | and then not Is_Interface (Typ) |
6243 | and then not Restriction_Active (No_Dispatching_Calls) | |
68f95949 | 6244 | then |
343d35dc | 6245 | -- Inherit the dispatch table |
d62940bf | 6246 | |
acf97c11 | 6247 | if not Is_Interface (Typ) |
cc60bd16 | 6248 | and then not Is_Interface (Parent_Typ) |
6249 | and then not Is_CPP_Class (Parent_Typ) | |
acf97c11 | 6250 | then |
6251 | declare | |
6252 | Nb_Prims : constant Int := | |
6253 | UI_To_Int (DT_Entry_Count | |
cc60bd16 | 6254 | (First_Tag_Component (Parent_Typ))); |
6255 | ||
acf97c11 | 6256 | begin |
6257 | Append_To (Elab_Code, | |
6258 | Build_Inherit_Predefined_Prims (Loc, | |
6259 | Old_Tag_Node => | |
83c6c069 | 6260 | New_Occurrence_Of |
acf97c11 | 6261 | (Node |
02a2406d | 6262 | (Next_Elmt |
6263 | (First_Elmt | |
6264 | (Access_Disp_Table (Parent_Typ)))), Loc), | |
acf97c11 | 6265 | New_Tag_Node => |
83c6c069 | 6266 | New_Occurrence_Of |
acf97c11 | 6267 | (Node |
02a2406d | 6268 | (Next_Elmt |
6269 | (First_Elmt | |
6270 | (Access_Disp_Table (Typ)))), Loc))); | |
acf97c11 | 6271 | |
6272 | if Nb_Prims /= 0 then | |
725a69d2 | 6273 | Append_To (Elab_Code, |
acf97c11 | 6274 | Build_Inherit_Prims (Loc, |
6275 | Typ => Typ, | |
6276 | Old_Tag_Node => | |
83c6c069 | 6277 | New_Occurrence_Of |
acf97c11 | 6278 | (Node |
02a2406d | 6279 | (First_Elmt |
6280 | (Access_Disp_Table (Parent_Typ))), Loc), | |
83c6c069 | 6281 | New_Tag_Node => New_Occurrence_Of (DT_Ptr, Loc), |
acf97c11 | 6282 | Num_Prims => Nb_Prims)); |
6283 | end if; | |
6284 | end; | |
af647dc7 | 6285 | end if; |
d62940bf | 6286 | |
af647dc7 | 6287 | -- Inherit the secondary dispatch tables of the ancestor |
d62940bf | 6288 | |
cc60bd16 | 6289 | if not Is_CPP_Class (Parent_Typ) then |
af647dc7 | 6290 | declare |
6291 | Sec_DT_Ancestor : Elmt_Id := | |
6292 | Next_Elmt | |
02a2406d | 6293 | (Next_Elmt |
6294 | (First_Elmt | |
6295 | (Access_Disp_Table | |
6296 | (Parent_Typ)))); | |
af647dc7 | 6297 | Sec_DT_Typ : Elmt_Id := |
6298 | Next_Elmt | |
02a2406d | 6299 | (Next_Elmt |
6300 | (First_Elmt | |
6301 | (Access_Disp_Table (Typ)))); | |
af647dc7 | 6302 | |
6303 | procedure Copy_Secondary_DTs (Typ : Entity_Id); | |
6304 | -- Local procedure required to climb through the ancestors | |
6305 | -- and copy the contents of all their secondary dispatch | |
6306 | -- tables. | |
6307 | ||
6308 | ------------------------ | |
6309 | -- Copy_Secondary_DTs -- | |
6310 | ------------------------ | |
6311 | ||
6312 | procedure Copy_Secondary_DTs (Typ : Entity_Id) is | |
6313 | E : Entity_Id; | |
6314 | Iface : Elmt_Id; | |
6315 | ||
6316 | begin | |
6317 | -- Climb to the ancestor (if any) handling private types | |
6318 | ||
6319 | if Present (Full_View (Etype (Typ))) then | |
6320 | if Full_View (Etype (Typ)) /= Typ then | |
6321 | Copy_Secondary_DTs (Full_View (Etype (Typ))); | |
6322 | end if; | |
d62940bf | 6323 | |
af647dc7 | 6324 | elsif Etype (Typ) /= Typ then |
6325 | Copy_Secondary_DTs (Etype (Typ)); | |
6326 | end if; | |
d62940bf | 6327 | |
a652dd51 | 6328 | if Present (Interfaces (Typ)) |
6329 | and then not Is_Empty_Elmt_List (Interfaces (Typ)) | |
af647dc7 | 6330 | then |
a652dd51 | 6331 | Iface := First_Elmt (Interfaces (Typ)); |
af647dc7 | 6332 | E := First_Entity (Typ); |
6333 | while Present (E) | |
6334 | and then Present (Node (Sec_DT_Ancestor)) | |
725a69d2 | 6335 | and then Ekind (Node (Sec_DT_Ancestor)) = E_Constant |
af647dc7 | 6336 | loop |
6337 | if Is_Tag (E) and then Chars (E) /= Name_uTag then | |
cdb1c38f | 6338 | declare |
6339 | Num_Prims : constant Int := | |
6340 | UI_To_Int (DT_Entry_Count (E)); | |
6341 | ||
6342 | begin | |
6343 | if not Is_Interface (Etype (Typ)) then | |
6344 | ||
6345 | -- Inherit first secondary dispatch table | |
6346 | ||
6347 | Append_To (Elab_Code, | |
6348 | Build_Inherit_Predefined_Prims (Loc, | |
6349 | Old_Tag_Node => | |
6350 | Unchecked_Convert_To (RTE (RE_Tag), | |
83c6c069 | 6351 | New_Occurrence_Of |
acf97c11 | 6352 | (Node |
6353 | (Next_Elmt (Sec_DT_Ancestor)), | |
6354 | Loc)), | |
cdb1c38f | 6355 | New_Tag_Node => |
6356 | Unchecked_Convert_To (RTE (RE_Tag), | |
83c6c069 | 6357 | New_Occurrence_Of |
acf97c11 | 6358 | (Node (Next_Elmt (Sec_DT_Typ)), |
6359 | Loc)))); | |
cdb1c38f | 6360 | |
6361 | if Num_Prims /= 0 then | |
6362 | Append_To (Elab_Code, | |
6363 | Build_Inherit_Prims (Loc, | |
6364 | Typ => Node (Iface), | |
6365 | Old_Tag_Node => | |
6366 | Unchecked_Convert_To | |
6367 | (RTE (RE_Tag), | |
83c6c069 | 6368 | New_Occurrence_Of |
cdb1c38f | 6369 | (Node (Sec_DT_Ancestor), |
6370 | Loc)), | |
6371 | New_Tag_Node => | |
6372 | Unchecked_Convert_To | |
6373 | (RTE (RE_Tag), | |
83c6c069 | 6374 | New_Occurrence_Of |
cdb1c38f | 6375 | (Node (Sec_DT_Typ), Loc)), |
6376 | Num_Prims => Num_Prims)); | |
6377 | end if; | |
6378 | end if; | |
6379 | ||
6380 | Next_Elmt (Sec_DT_Ancestor); | |
6381 | Next_Elmt (Sec_DT_Typ); | |
343d35dc | 6382 | |
acf97c11 | 6383 | -- Skip the secondary dispatch table of |
6384 | -- predefined primitives | |
6385 | ||
6386 | Next_Elmt (Sec_DT_Ancestor); | |
6387 | Next_Elmt (Sec_DT_Typ); | |
6388 | ||
cdb1c38f | 6389 | if not Is_Interface (Etype (Typ)) then |
6390 | ||
6391 | -- Inherit second secondary dispatch table | |
343d35dc | 6392 | |
343d35dc | 6393 | Append_To (Elab_Code, |
6394 | Build_Inherit_Predefined_Prims (Loc, | |
6395 | Old_Tag_Node => | |
6396 | Unchecked_Convert_To (RTE (RE_Tag), | |
83c6c069 | 6397 | New_Occurrence_Of |
acf97c11 | 6398 | (Node |
6399 | (Next_Elmt (Sec_DT_Ancestor)), | |
6400 | Loc)), | |
343d35dc | 6401 | New_Tag_Node => |
6402 | Unchecked_Convert_To (RTE (RE_Tag), | |
83c6c069 | 6403 | New_Occurrence_Of |
acf97c11 | 6404 | (Node (Next_Elmt (Sec_DT_Typ)), |
6405 | Loc)))); | |
343d35dc | 6406 | |
6407 | if Num_Prims /= 0 then | |
6408 | Append_To (Elab_Code, | |
6409 | Build_Inherit_Prims (Loc, | |
17e14451 | 6410 | Typ => Node (Iface), |
343d35dc | 6411 | Old_Tag_Node => |
6412 | Unchecked_Convert_To | |
6413 | (RTE (RE_Tag), | |
83c6c069 | 6414 | New_Occurrence_Of |
343d35dc | 6415 | (Node (Sec_DT_Ancestor), |
6416 | Loc)), | |
6417 | New_Tag_Node => | |
6418 | Unchecked_Convert_To | |
6419 | (RTE (RE_Tag), | |
83c6c069 | 6420 | New_Occurrence_Of |
343d35dc | 6421 | (Node (Sec_DT_Typ), Loc)), |
17e14451 | 6422 | Num_Prims => Num_Prims)); |
343d35dc | 6423 | end if; |
cdb1c38f | 6424 | end if; |
6425 | end; | |
af647dc7 | 6426 | |
6427 | Next_Elmt (Sec_DT_Ancestor); | |
6428 | Next_Elmt (Sec_DT_Typ); | |
acf97c11 | 6429 | |
6430 | -- Skip the secondary dispatch table of | |
6431 | -- predefined primitives | |
6432 | ||
6433 | Next_Elmt (Sec_DT_Ancestor); | |
6434 | Next_Elmt (Sec_DT_Typ); | |
6435 | ||
af647dc7 | 6436 | Next_Elmt (Iface); |
6437 | end if; | |
d62940bf | 6438 | |
af647dc7 | 6439 | Next_Entity (E); |
6440 | end loop; | |
6441 | end if; | |
6442 | end Copy_Secondary_DTs; | |
d62940bf | 6443 | |
af647dc7 | 6444 | begin |
725a69d2 | 6445 | if Present (Node (Sec_DT_Ancestor)) |
6446 | and then Ekind (Node (Sec_DT_Ancestor)) = E_Constant | |
6447 | then | |
af647dc7 | 6448 | -- Handle private types |
76a1c25b | 6449 | |
af647dc7 | 6450 | if Present (Full_View (Typ)) then |
6451 | Copy_Secondary_DTs (Full_View (Typ)); | |
6452 | else | |
6453 | Copy_Secondary_DTs (Typ); | |
6454 | end if; | |
76a1c25b | 6455 | end if; |
af647dc7 | 6456 | end; |
6457 | end if; | |
76a1c25b | 6458 | end if; |
343d35dc | 6459 | end if; |
d62940bf | 6460 | |
15a67a0a | 6461 | -- Generate code to check if the external tag of this type is the same |
6462 | -- as the external tag of some other declaration. | |
354540f3 | 6463 | |
6464 | -- Check_TSD (TSD'Unrestricted_Access); | |
6465 | ||
4a473cb9 | 6466 | -- This check is a consequence of AI05-0113-1/06, so it officially |
6467 | -- applies to Ada 2005 (and Ada 2012). It might be argued that it is | |
6468 | -- a desirable check to add in Ada 95 mode, but we hesitate to make | |
6469 | -- this change, as it would be incompatible, and could conceivably | |
cb0deab3 | 6470 | -- cause a problem in existing Ada 95 code. |
4a473cb9 | 6471 | |
6472 | -- We check for No_Run_Time_Mode here, because we do not want to pick | |
6473 | -- up the RE_Check_TSD entity and call it in No_Run_Time mode. | |
52b9debb | 6474 | |
f76c2b51 | 6475 | -- We cannot perform this check if the generation of its expanded name |
6476 | -- was discarded. | |
6477 | ||
354540f3 | 6478 | if not No_Run_Time_Mode |
cb0deab3 | 6479 | and then not Discard_Names |
4a473cb9 | 6480 | and then Ada_Version >= Ada_2005 |
354540f3 | 6481 | and then RTE_Available (RE_Check_TSD) |
fa771c05 | 6482 | and then not Duplicated_Tag_Checks_Suppressed (Typ) |
354540f3 | 6483 | then |
6484 | Append_To (Elab_Code, | |
6485 | Make_Procedure_Call_Statement (Loc, | |
15a67a0a | 6486 | Name => |
6487 | New_Occurrence_Of (RTE (RE_Check_TSD), Loc), | |
354540f3 | 6488 | Parameter_Associations => New_List ( |
6489 | Make_Attribute_Reference (Loc, | |
15a67a0a | 6490 | Prefix => New_Occurrence_Of (TSD, Loc), |
354540f3 | 6491 | Attribute_Name => Name_Unchecked_Access)))); |
6492 | end if; | |
6493 | ||
343d35dc | 6494 | -- Generate code to register the Tag in the External_Tag hash table for |
6495 | -- the pure Ada type only. | |
d62940bf | 6496 | |
343d35dc | 6497 | -- Register_Tag (Dt_Ptr); |
d62940bf | 6498 | |
725a69d2 | 6499 | -- Skip this action in the following cases: |
6500 | -- 1) if Register_Tag is not available. | |
6501 | -- 2) in No_Run_Time mode. | |
2ea346ac | 6502 | -- 3) if Typ is not defined at the library level (this is required |
725a69d2 | 6503 | -- to avoid adding concurrency control to the hash table used |
6504 | -- by the run-time to register the tags). | |
d62940bf | 6505 | |
cdb1c38f | 6506 | if not No_Run_Time_Mode |
6507 | and then Is_Library_Level_Entity (Typ) | |
6508 | and then RTE_Available (RE_Register_Tag) | |
6509 | then | |
725a69d2 | 6510 | Append_To (Elab_Code, |
cdb1c38f | 6511 | Make_Procedure_Call_Statement (Loc, |
02a2406d | 6512 | Name => |
6513 | New_Occurrence_Of (RTE (RE_Register_Tag), Loc), | |
cdb1c38f | 6514 | Parameter_Associations => |
83c6c069 | 6515 | New_List (New_Occurrence_Of (DT_Ptr, Loc)))); |
d62940bf | 6516 | end if; |
6517 | ||
2ea346ac | 6518 | if not Is_Empty_List (Elab_Code) then |
6519 | Append_List_To (Result, Elab_Code); | |
6520 | end if; | |
cdb1c38f | 6521 | |
f38c8084 | 6522 | -- Populate the two auxiliary tables used for dispatching asynchronous, |
6523 | -- conditional and timed selects for synchronized types that implement | |
6524 | -- a limited interface. Skip this step in Ravenscar profile or when | |
6525 | -- general dispatching is forbidden. | |
17e14451 | 6526 | |
de54c5ab | 6527 | if Ada_Version >= Ada_2005 |
17e14451 | 6528 | and then Is_Concurrent_Record_Type (Typ) |
a652dd51 | 6529 | and then Has_Interfaces (Typ) |
f38c8084 | 6530 | and then not Restriction_Active (No_Dispatching_Calls) |
6531 | and then not Restriction_Active (No_Select_Statements) | |
17e14451 | 6532 | then |
6533 | Append_List_To (Result, | |
6534 | Make_Select_Specific_Data_Table (Typ)); | |
6535 | end if; | |
6536 | ||
cc60bd16 | 6537 | -- Remember entities containing dispatch tables |
acf97c11 | 6538 | |
cc60bd16 | 6539 | Append_Elmt (Predef_Prims, DT_Decl); |
6540 | Append_Elmt (DT, DT_Decl); | |
acf97c11 | 6541 | |
725a69d2 | 6542 | Analyze_List (Result, Suppress => All_Checks); |
17e14451 | 6543 | Set_Has_Dispatch_Table (Typ); |
6544 | ||
f301a57b | 6545 | -- Mark entities containing dispatch tables. Required by the backend to |
6546 | -- handle them properly. | |
cc60bd16 | 6547 | |
925c2ba1 | 6548 | if Has_DT (Typ) then |
cc60bd16 | 6549 | declare |
6550 | Elmt : Elmt_Id; | |
6551 | ||
6552 | begin | |
cc60bd16 | 6553 | -- Object declarations |
6554 | ||
6555 | Elmt := First_Elmt (DT_Decl); | |
6556 | while Present (Elmt) loop | |
6557 | Set_Is_Dispatch_Table_Entity (Node (Elmt)); | |
6558 | pragma Assert (Ekind (Etype (Node (Elmt))) = E_Array_Subtype | |
6559 | or else Ekind (Etype (Node (Elmt))) = E_Record_Subtype); | |
6560 | Set_Is_Dispatch_Table_Entity (Etype (Node (Elmt))); | |
6561 | Next_Elmt (Elmt); | |
6562 | end loop; | |
6563 | ||
6564 | -- Aggregates initializing dispatch tables | |
6565 | ||
6566 | Elmt := First_Elmt (DT_Aggr); | |
6567 | while Present (Elmt) loop | |
6568 | Set_Is_Dispatch_Table_Entity (Etype (Node (Elmt))); | |
6569 | Next_Elmt (Elmt); | |
6570 | end loop; | |
6571 | end; | |
6572 | end if; | |
6573 | ||
72a98436 | 6574 | <<Leave_SCIL>> |
83d39cd3 | 6575 | |
e00e091c | 6576 | -- Register the tagged type in the call graph nodes table |
6577 | ||
6578 | Register_CG_Node (Typ); | |
6579 | ||
72a98436 | 6580 | <<Leave>> |
150bddeb | 6581 | Restore_Ghost_Region (Saved_GM, Saved_IGR); |
72a98436 | 6582 | |
76a1c25b | 6583 | return Result; |
6584 | end Make_DT; | |
d62940bf | 6585 | |
76a1c25b | 6586 | ------------------------------------- |
6587 | -- Make_Select_Specific_Data_Table -- | |
6588 | ------------------------------------- | |
d62940bf | 6589 | |
76a1c25b | 6590 | function Make_Select_Specific_Data_Table |
6591 | (Typ : Entity_Id) return List_Id | |
6592 | is | |
6593 | Assignments : constant List_Id := New_List; | |
6594 | Loc : constant Source_Ptr := Sloc (Typ); | |
d62940bf | 6595 | |
68f95949 | 6596 | Conc_Typ : Entity_Id; |
95c577d7 | 6597 | Decls : List_Id := No_List; |
68f95949 | 6598 | Prim : Entity_Id; |
6599 | Prim_Als : Entity_Id; | |
6600 | Prim_Elmt : Elmt_Id; | |
6601 | Prim_Pos : Uint; | |
343d35dc | 6602 | Nb_Prim : Nat := 0; |
d62940bf | 6603 | |
76a1c25b | 6604 | type Examined_Array is array (Int range <>) of Boolean; |
d62940bf | 6605 | |
76a1c25b | 6606 | function Find_Entry_Index (E : Entity_Id) return Uint; |
6607 | -- Given an entry, find its index in the visible declarations of the | |
6608 | -- corresponding concurrent type of Typ. | |
d62940bf | 6609 | |
76a1c25b | 6610 | ---------------------- |
6611 | -- Find_Entry_Index -- | |
6612 | ---------------------- | |
d62940bf | 6613 | |
76a1c25b | 6614 | function Find_Entry_Index (E : Entity_Id) return Uint is |
6615 | Index : Uint := Uint_1; | |
6616 | Subp_Decl : Entity_Id; | |
d62940bf | 6617 | |
76a1c25b | 6618 | begin |
6619 | if Present (Decls) | |
6620 | and then not Is_Empty_List (Decls) | |
6621 | then | |
6622 | Subp_Decl := First (Decls); | |
6623 | while Present (Subp_Decl) loop | |
6624 | if Nkind (Subp_Decl) = N_Entry_Declaration then | |
6625 | if Defining_Identifier (Subp_Decl) = E then | |
6626 | return Index; | |
6627 | end if; | |
d62940bf | 6628 | |
76a1c25b | 6629 | Index := Index + 1; |
6630 | end if; | |
d62940bf | 6631 | |
76a1c25b | 6632 | Next (Subp_Decl); |
6633 | end loop; | |
6634 | end if; | |
d62940bf | 6635 | |
76a1c25b | 6636 | return Uint_0; |
6637 | end Find_Entry_Index; | |
6638 | ||
bf7f5966 | 6639 | -- Local variables |
6640 | ||
6641 | Tag_Node : Node_Id; | |
6642 | ||
76a1c25b | 6643 | -- Start of processing for Make_Select_Specific_Data_Table |
6644 | ||
6645 | begin | |
68f95949 | 6646 | pragma Assert (not Restriction_Active (No_Dispatching_Calls)); |
6647 | ||
76a1c25b | 6648 | if Present (Corresponding_Concurrent_Type (Typ)) then |
6649 | Conc_Typ := Corresponding_Concurrent_Type (Typ); | |
6650 | ||
17e14451 | 6651 | if Present (Full_View (Conc_Typ)) then |
6652 | Conc_Typ := Full_View (Conc_Typ); | |
6653 | end if; | |
6654 | ||
76a1c25b | 6655 | if Ekind (Conc_Typ) = E_Protected_Type then |
6656 | Decls := Visible_Declarations (Protected_Definition ( | |
6657 | Parent (Conc_Typ))); | |
d62940bf | 6658 | else |
6659 | pragma Assert (Ekind (Conc_Typ) = E_Task_Type); | |
76a1c25b | 6660 | Decls := Visible_Declarations (Task_Definition ( |
6661 | Parent (Conc_Typ))); | |
6662 | end if; | |
6663 | end if; | |
d62940bf | 6664 | |
76a1c25b | 6665 | -- Count the non-predefined primitive operations |
d62940bf | 6666 | |
76a1c25b | 6667 | Prim_Elmt := First_Elmt (Primitive_Operations (Typ)); |
6668 | while Present (Prim_Elmt) loop | |
af647dc7 | 6669 | Prim := Node (Prim_Elmt); |
6670 | ||
6671 | if not (Is_Predefined_Dispatching_Operation (Prim) | |
6672 | or else Is_Predefined_Dispatching_Alias (Prim)) | |
6673 | then | |
76a1c25b | 6674 | Nb_Prim := Nb_Prim + 1; |
6675 | end if; | |
d62940bf | 6676 | |
76a1c25b | 6677 | Next_Elmt (Prim_Elmt); |
6678 | end loop; | |
d62940bf | 6679 | |
76a1c25b | 6680 | declare |
68f95949 | 6681 | Examined : Examined_Array (1 .. Nb_Prim) := (others => False); |
d62940bf | 6682 | |
76a1c25b | 6683 | begin |
6684 | Prim_Elmt := First_Elmt (Primitive_Operations (Typ)); | |
6685 | while Present (Prim_Elmt) loop | |
6686 | Prim := Node (Prim_Elmt); | |
d62940bf | 6687 | |
af647dc7 | 6688 | -- Look for primitive overriding an abstract interface subprogram |
d62940bf | 6689 | |
a652dd51 | 6690 | if Present (Interface_Alias (Prim)) |
c8da6114 | 6691 | and then not |
6692 | Is_Ancestor | |
cb4af01d | 6693 | (Find_Dispatching_Type (Interface_Alias (Prim)), Typ, |
6694 | Use_Full_View => True) | |
af647dc7 | 6695 | and then not Examined (UI_To_Int (DT_Position (Alias (Prim)))) |
6696 | then | |
6697 | Prim_Pos := DT_Position (Alias (Prim)); | |
6698 | pragma Assert (UI_To_Int (Prim_Pos) <= Nb_Prim); | |
6699 | Examined (UI_To_Int (Prim_Pos)) := True; | |
d62940bf | 6700 | |
af647dc7 | 6701 | -- Set the primitive operation kind regardless of subprogram |
6702 | -- type. Generate: | |
6703 | -- Ada.Tags.Set_Prim_Op_Kind (DT_Ptr, <position>, <kind>); | |
d62940bf | 6704 | |
bf7f5966 | 6705 | if Tagged_Type_Expansion then |
6706 | Tag_Node := | |
83c6c069 | 6707 | New_Occurrence_Of |
bf7f5966 | 6708 | (Node (First_Elmt (Access_Disp_Table (Typ))), Loc); |
6709 | ||
6710 | else | |
6711 | Tag_Node := | |
6712 | Make_Attribute_Reference (Loc, | |
83c6c069 | 6713 | Prefix => New_Occurrence_Of (Typ, Loc), |
bf7f5966 | 6714 | Attribute_Name => Name_Tag); |
6715 | end if; | |
6716 | ||
af647dc7 | 6717 | Append_To (Assignments, |
725a69d2 | 6718 | Make_Procedure_Call_Statement (Loc, |
83c6c069 | 6719 | Name => New_Occurrence_Of (RTE (RE_Set_Prim_Op_Kind), Loc), |
725a69d2 | 6720 | Parameter_Associations => New_List ( |
bf7f5966 | 6721 | Tag_Node, |
725a69d2 | 6722 | Make_Integer_Literal (Loc, Prim_Pos), |
6723 | Prim_Op_Kind (Alias (Prim), Typ)))); | |
68f95949 | 6724 | |
af647dc7 | 6725 | -- Retrieve the root of the alias chain |
68f95949 | 6726 | |
fc2907f6 | 6727 | Prim_Als := Ultimate_Alias (Prim); |
68f95949 | 6728 | |
af647dc7 | 6729 | -- In the case of an entry wrapper, set the entry index |
68f95949 | 6730 | |
af647dc7 | 6731 | if Ekind (Prim) = E_Procedure |
6732 | and then Is_Primitive_Wrapper (Prim_Als) | |
6733 | and then Ekind (Wrapped_Entity (Prim_Als)) = E_Entry | |
6734 | then | |
6735 | -- Generate: | |
6736 | -- Ada.Tags.Set_Entry_Index | |
6737 | -- (DT_Ptr, <position>, <index>); | |
68f95949 | 6738 | |
bf7f5966 | 6739 | if Tagged_Type_Expansion then |
6740 | Tag_Node := | |
83c6c069 | 6741 | New_Occurrence_Of |
96dc081d | 6742 | (Node (First_Elmt (Access_Disp_Table (Typ))), Loc); |
bf7f5966 | 6743 | else |
6744 | Tag_Node := | |
6745 | Make_Attribute_Reference (Loc, | |
83c6c069 | 6746 | Prefix => New_Occurrence_Of (Typ, Loc), |
bf7f5966 | 6747 | Attribute_Name => Name_Tag); |
6748 | end if; | |
6749 | ||
af647dc7 | 6750 | Append_To (Assignments, |
725a69d2 | 6751 | Make_Procedure_Call_Statement (Loc, |
6752 | Name => | |
83c6c069 | 6753 | New_Occurrence_Of (RTE (RE_Set_Entry_Index), Loc), |
725a69d2 | 6754 | Parameter_Associations => New_List ( |
bf7f5966 | 6755 | Tag_Node, |
725a69d2 | 6756 | Make_Integer_Literal (Loc, Prim_Pos), |
6757 | Make_Integer_Literal (Loc, | |
6758 | Find_Entry_Index (Wrapped_Entity (Prim_Als)))))); | |
76a1c25b | 6759 | end if; |
6760 | end if; | |
6761 | ||
76a1c25b | 6762 | Next_Elmt (Prim_Elmt); |
6763 | end loop; | |
6764 | end; | |
6765 | ||
6766 | return Assignments; | |
6767 | end Make_Select_Specific_Data_Table; | |
d62940bf | 6768 | |
17e14451 | 6769 | --------------- |
6770 | -- Make_Tags -- | |
6771 | --------------- | |
6772 | ||
6773 | function Make_Tags (Typ : Entity_Id) return List_Id is | |
f301a57b | 6774 | Loc : constant Source_Ptr := Sloc (Typ); |
6775 | Result : constant List_Id := New_List; | |
6776 | ||
6777 | procedure Import_DT | |
6778 | (Tag_Typ : Entity_Id; | |
6779 | DT : Entity_Id; | |
6780 | Is_Secondary_DT : Boolean); | |
6781 | -- Import the dispatch table DT of tagged type Tag_Typ. Required to | |
6782 | -- generate forward references and statically allocate the table. For | |
6783 | -- primary dispatch tables that require no dispatch table generate: | |
d03ada96 | 6784 | |
f301a57b | 6785 | -- DT : static aliased constant Non_Dispatch_Table_Wrapper; |
d03ada96 | 6786 | -- pragma Import (Ada, DT); |
6787 | ||
f301a57b | 6788 | -- Otherwise generate: |
d03ada96 | 6789 | |
f301a57b | 6790 | -- DT : static aliased constant Dispatch_Table_Wrapper (Nb_Prim); |
d03ada96 | 6791 | -- pragma Import (Ada, DT); |
7854e190 | 6792 | |
f301a57b | 6793 | --------------- |
6794 | -- Import_DT -- | |
6795 | --------------- | |
24971415 | 6796 | |
f301a57b | 6797 | procedure Import_DT |
6798 | (Tag_Typ : Entity_Id; | |
6799 | DT : Entity_Id; | |
6800 | Is_Secondary_DT : Boolean) | |
6801 | is | |
6802 | DT_Constr_List : List_Id; | |
6803 | Nb_Prim : Nat; | |
24971415 | 6804 | |
f301a57b | 6805 | begin |
6806 | Set_Is_Imported (DT); | |
6807 | Set_Ekind (DT, E_Constant); | |
6808 | Set_Related_Type (DT, Typ); | |
24971415 | 6809 | |
24971415 | 6810 | -- The scope must be set now to call Get_External_Name |
6811 | ||
6812 | Set_Scope (DT, Current_Scope); | |
6813 | ||
f92da234 | 6814 | Get_External_Name (DT); |
24971415 | 6815 | Set_Interface_Name (DT, |
d03ada96 | 6816 | Make_String_Literal (Loc, Strval => String_From_Name_Buffer)); |
17e14451 | 6817 | |
24971415 | 6818 | -- Ensure proper Sprint output of this implicit importation |
17e14451 | 6819 | |
24971415 | 6820 | Set_Is_Internal (DT); |
17e14451 | 6821 | |
24971415 | 6822 | -- Save this entity to allow Make_DT to generate its exportation |
6823 | ||
f301a57b | 6824 | Append_Elmt (DT, Dispatch_Table_Wrappers (Typ)); |
24971415 | 6825 | |
f301a57b | 6826 | -- No dispatch table required |
acf97c11 | 6827 | |
d03ada96 | 6828 | if not Is_Secondary_DT and then not Has_DT (Tag_Typ) then |
f301a57b | 6829 | Append_To (Result, |
6830 | Make_Object_Declaration (Loc, | |
6831 | Defining_Identifier => DT, | |
6832 | Aliased_Present => True, | |
6833 | Constant_Present => True, | |
6834 | Object_Definition => | |
83c6c069 | 6835 | New_Occurrence_Of |
6836 | (RTE (RE_No_Dispatch_Table_Wrapper), Loc))); | |
f301a57b | 6837 | |
6838 | else | |
24971415 | 6839 | -- Calculate the number of primitives of the dispatch table and |
6840 | -- the size of the Type_Specific_Data record. | |
6841 | ||
f301a57b | 6842 | Nb_Prim := |
6843 | UI_To_Int (DT_Entry_Count (First_Tag_Component (Tag_Typ))); | |
24971415 | 6844 | |
d03ada96 | 6845 | -- If the tagged type has no primitives we add a dummy slot whose |
6846 | -- address will be the tag of this type. | |
24971415 | 6847 | |
6848 | if Nb_Prim = 0 then | |
6849 | DT_Constr_List := | |
6850 | New_List (Make_Integer_Literal (Loc, 1)); | |
6851 | else | |
6852 | DT_Constr_List := | |
6853 | New_List (Make_Integer_Literal (Loc, Nb_Prim)); | |
6854 | end if; | |
6855 | ||
6856 | Append_To (Result, | |
6857 | Make_Object_Declaration (Loc, | |
6858 | Defining_Identifier => DT, | |
6859 | Aliased_Present => True, | |
6860 | Constant_Present => True, | |
6861 | Object_Definition => | |
6862 | Make_Subtype_Indication (Loc, | |
6863 | Subtype_Mark => | |
83c6c069 | 6864 | New_Occurrence_Of (RTE (RE_Dispatch_Table_Wrapper), Loc), |
24971415 | 6865 | Constraint => Make_Index_Or_Discriminant_Constraint (Loc, |
6866 | Constraints => DT_Constr_List)))); | |
f301a57b | 6867 | end if; |
6868 | end Import_DT; | |
6869 | ||
6870 | -- Local variables | |
6871 | ||
6872 | Tname : constant Name_Id := Chars (Typ); | |
6873 | AI_Tag_Comp : Elmt_Id; | |
7640ed3d | 6874 | DT : Node_Id := Empty; |
f301a57b | 6875 | DT_Ptr : Node_Id; |
6876 | Predef_Prims_Ptr : Node_Id; | |
d04be62f | 6877 | Iface_DT : Node_Id := Empty; |
f301a57b | 6878 | Iface_DT_Ptr : Node_Id; |
d215f619 | 6879 | New_Node : Node_Id; |
f301a57b | 6880 | Suffix_Index : Int; |
6881 | Typ_Name : Name_Id; | |
6882 | Typ_Comps : Elist_Id; | |
6883 | ||
6884 | -- Start of processing for Make_Tags | |
6885 | ||
6886 | begin | |
d00681a7 | 6887 | pragma Assert (No (Access_Disp_Table (Typ))); |
6888 | Set_Access_Disp_Table (Typ, New_Elmt_List); | |
f301a57b | 6889 | |
1f0c90bb | 6890 | -- If the elaboration of this tagged type needs a boolean flag then |
6891 | -- define now its entity. It is initialized to True to indicate that | |
6892 | -- elaboration is still pending; set to False by the IP routine. | |
6893 | ||
6894 | -- TypFxx : boolean := True; | |
6895 | ||
6896 | if Elab_Flag_Needed (Typ) then | |
6897 | Set_Access_Disp_Table_Elab_Flag (Typ, | |
6898 | Make_Defining_Identifier (Loc, | |
edfb7dbc | 6899 | Chars => New_External_Name (Tname, 'F'))); |
1f0c90bb | 6900 | |
6901 | Append_To (Result, | |
6902 | Make_Object_Declaration (Loc, | |
6903 | Defining_Identifier => Access_Disp_Table_Elab_Flag (Typ), | |
6904 | Object_Definition => New_Occurrence_Of (Standard_Boolean, Loc), | |
6905 | Expression => New_Occurrence_Of (Standard_True, Loc))); | |
6906 | end if; | |
6907 | ||
f301a57b | 6908 | -- 1) Generate the primary tag entities |
6909 | ||
6910 | -- Primary dispatch table containing user-defined primitives | |
6911 | ||
d00681a7 | 6912 | DT_Ptr := Make_Defining_Identifier (Loc, New_External_Name (Tname, 'P')); |
6913 | Set_Etype (DT_Ptr, RTE (RE_Tag)); | |
6914 | Append_Elmt (DT_Ptr, Access_Disp_Table (Typ)); | |
f301a57b | 6915 | |
d00681a7 | 6916 | -- Minimum decoration |
f301a57b | 6917 | |
d00681a7 | 6918 | Set_Ekind (DT_Ptr, E_Variable); |
6919 | Set_Related_Type (DT_Ptr, Typ); | |
f301a57b | 6920 | |
02a2406d | 6921 | -- Notify back end that the types are associated with a dispatch table |
2ff0322d | 6922 | |
6923 | Set_Is_Dispatch_Table_Entity (RTE (RE_Prim_Ptr)); | |
6924 | Set_Is_Dispatch_Table_Entity (RTE (RE_Predef_Prims_Table_Ptr)); | |
6925 | ||
d00681a7 | 6926 | -- For CPP types there is no need to build the dispatch tables since |
5682f43c | 6927 | -- they are imported from the C++ side. If the CPP type has an IP then |
6928 | -- we declare now the variable that will store the copy of the C++ tag. | |
d03ada96 | 6929 | -- If the CPP type is an interface, we need the variable as well because |
6930 | -- it becomes the pointer to the corresponding secondary table. | |
f301a57b | 6931 | |
d00681a7 | 6932 | if Is_CPP_Class (Typ) then |
5682f43c | 6933 | if Has_CPP_Constructors (Typ) or else Is_Interface (Typ) then |
24971415 | 6934 | Append_To (Result, |
6935 | Make_Object_Declaration (Loc, | |
6936 | Defining_Identifier => DT_Ptr, | |
83c6c069 | 6937 | Object_Definition => New_Occurrence_Of (RTE (RE_Tag), Loc), |
24971415 | 6938 | Expression => |
6939 | Unchecked_Convert_To (RTE (RE_Tag), | |
83c6c069 | 6940 | New_Occurrence_Of (RTE (RE_Null_Address), Loc)))); |
24971415 | 6941 | |
d00681a7 | 6942 | Set_Is_Statically_Allocated (DT_Ptr, |
6943 | Is_Library_Level_Tagged_Type (Typ)); | |
6944 | end if; | |
9af28f61 | 6945 | |
d00681a7 | 6946 | -- Ada types |
3dbca0d5 | 6947 | |
d00681a7 | 6948 | else |
6949 | -- Primary dispatch table containing predefined primitives | |
acf97c11 | 6950 | |
d00681a7 | 6951 | Predef_Prims_Ptr := |
6952 | Make_Defining_Identifier (Loc, | |
6953 | Chars => New_External_Name (Tname, 'Y')); | |
6954 | Set_Etype (Predef_Prims_Ptr, RTE (RE_Address)); | |
6955 | Append_Elmt (Predef_Prims_Ptr, Access_Disp_Table (Typ)); | |
24971415 | 6956 | |
d00681a7 | 6957 | -- Import the forward declaration of the Dispatch Table wrapper |
d03ada96 | 6958 | -- record (Make_DT will take care of exporting it). |
24971415 | 6959 | |
d00681a7 | 6960 | if Building_Static_DT (Typ) then |
6961 | Set_Dispatch_Table_Wrappers (Typ, New_Elmt_List); | |
17e14451 | 6962 | |
d00681a7 | 6963 | DT := |
6964 | Make_Defining_Identifier (Loc, | |
6965 | Chars => New_External_Name (Tname, 'T')); | |
6966 | ||
6967 | Import_DT (Typ, DT, Is_Secondary_DT => False); | |
6968 | ||
6969 | if Has_DT (Typ) then | |
6970 | Append_To (Result, | |
6971 | Make_Object_Declaration (Loc, | |
6972 | Defining_Identifier => DT_Ptr, | |
6973 | Constant_Present => True, | |
83c6c069 | 6974 | Object_Definition => |
6975 | New_Occurrence_Of (RTE (RE_Tag), Loc), | |
4055a532 | 6976 | Expression => |
d00681a7 | 6977 | Unchecked_Convert_To (RTE (RE_Tag), |
6978 | Make_Attribute_Reference (Loc, | |
4055a532 | 6979 | Prefix => |
d00681a7 | 6980 | Make_Selected_Component (Loc, |
83c6c069 | 6981 | Prefix => New_Occurrence_Of (DT, Loc), |
4055a532 | 6982 | Selector_Name => |
6983 | New_Occurrence_Of | |
6984 | (RTE_Record_Component (RE_Prims_Ptr), Loc)), | |
d00681a7 | 6985 | Attribute_Name => Name_Address)))); |
6986 | ||
6987 | -- Generate the SCIL node for the previous object declaration | |
6988 | -- because it has a tag initialization. | |
6989 | ||
6990 | if Generate_SCIL then | |
6991 | New_Node := | |
6992 | Make_SCIL_Dispatch_Table_Tag_Init (Sloc (Last (Result))); | |
6993 | Set_SCIL_Entity (New_Node, Typ); | |
6994 | Set_SCIL_Node (Last (Result), New_Node); | |
6995 | end if; | |
6996 | ||
6997 | Append_To (Result, | |
6998 | Make_Object_Declaration (Loc, | |
6999 | Defining_Identifier => Predef_Prims_Ptr, | |
7000 | Constant_Present => True, | |
4055a532 | 7001 | Object_Definition => |
83c6c069 | 7002 | New_Occurrence_Of (RTE (RE_Address), Loc), |
4055a532 | 7003 | Expression => |
d00681a7 | 7004 | Make_Attribute_Reference (Loc, |
4055a532 | 7005 | Prefix => |
d00681a7 | 7006 | Make_Selected_Component (Loc, |
83c6c069 | 7007 | Prefix => New_Occurrence_Of (DT, Loc), |
4055a532 | 7008 | Selector_Name => |
7009 | New_Occurrence_Of | |
7010 | (RTE_Record_Component (RE_Predef_Prims), Loc)), | |
d00681a7 | 7011 | Attribute_Name => Name_Address))); |
7012 | ||
7013 | -- No dispatch table required | |
7014 | ||
7015 | else | |
7016 | Append_To (Result, | |
7017 | Make_Object_Declaration (Loc, | |
7018 | Defining_Identifier => DT_Ptr, | |
7019 | Constant_Present => True, | |
83c6c069 | 7020 | Object_Definition => |
7021 | New_Occurrence_Of (RTE (RE_Tag), Loc), | |
4055a532 | 7022 | Expression => |
d00681a7 | 7023 | Unchecked_Convert_To (RTE (RE_Tag), |
7024 | Make_Attribute_Reference (Loc, | |
4055a532 | 7025 | Prefix => |
d00681a7 | 7026 | Make_Selected_Component (Loc, |
83c6c069 | 7027 | Prefix => New_Occurrence_Of (DT, Loc), |
4055a532 | 7028 | Selector_Name => |
7029 | New_Occurrence_Of | |
7030 | (RTE_Record_Component (RE_NDT_Prims_Ptr), | |
7031 | Loc)), | |
d00681a7 | 7032 | Attribute_Name => Name_Address)))); |
7033 | end if; | |
7034 | ||
7035 | Set_Is_True_Constant (DT_Ptr); | |
7036 | Set_Is_Statically_Allocated (DT_Ptr); | |
7037 | end if; | |
7038 | end if; | |
17e14451 | 7039 | |
7040 | -- 2) Generate the secondary tag entities | |
7041 | ||
d00681a7 | 7042 | -- Collect the components associated with secondary dispatch tables |
7043 | ||
a652dd51 | 7044 | if Has_Interfaces (Typ) then |
d00681a7 | 7045 | Collect_Interface_Components (Typ, Typ_Comps); |
f301a57b | 7046 | |
d03ada96 | 7047 | -- For each interface type we build a unique external name associated |
7048 | -- with its secondary dispatch table. This name is used to declare an | |
7049 | -- object that references this secondary dispatch table, whose value | |
7050 | -- will be used for the elaboration of Typ objects, and also for the | |
7051 | -- elaboration of objects of types derived from Typ that do not | |
7052 | -- override the primitives of this interface type. | |
f301a57b | 7053 | |
7054 | Suffix_Index := 1; | |
17e14451 | 7055 | |
02a2406d | 7056 | -- Note: The value of Suffix_Index must be in sync with the values of |
7057 | -- Suffix_Index in secondary dispatch tables generated by Make_DT. | |
17e14451 | 7058 | |
d00681a7 | 7059 | if Is_CPP_Class (Typ) then |
7060 | AI_Tag_Comp := First_Elmt (Typ_Comps); | |
7061 | while Present (AI_Tag_Comp) loop | |
7062 | Get_Secondary_DT_External_Name | |
7063 | (Typ, Related_Type (Node (AI_Tag_Comp)), Suffix_Index); | |
7064 | Typ_Name := Name_Find; | |
17e14451 | 7065 | |
02a2406d | 7066 | -- Declare variables to store copy of the C++ secondary tags |
f301a57b | 7067 | |
d00681a7 | 7068 | Iface_DT_Ptr := |
7069 | Make_Defining_Identifier (Loc, | |
7070 | Chars => New_External_Name (Typ_Name, 'P')); | |
7071 | Set_Etype (Iface_DT_Ptr, RTE (RE_Interface_Tag)); | |
7072 | Set_Ekind (Iface_DT_Ptr, E_Variable); | |
7073 | Set_Is_Tag (Iface_DT_Ptr); | |
acf97c11 | 7074 | |
d00681a7 | 7075 | Set_Has_Thunks (Iface_DT_Ptr); |
7076 | Set_Related_Type | |
7077 | (Iface_DT_Ptr, Related_Type (Node (AI_Tag_Comp))); | |
7078 | Append_Elmt (Iface_DT_Ptr, Access_Disp_Table (Typ)); | |
cdb1c38f | 7079 | |
f301a57b | 7080 | Append_To (Result, |
7081 | Make_Object_Declaration (Loc, | |
7082 | Defining_Identifier => Iface_DT_Ptr, | |
83c6c069 | 7083 | Object_Definition => New_Occurrence_Of |
f301a57b | 7084 | (RTE (RE_Interface_Tag), Loc), |
7085 | Expression => | |
7086 | Unchecked_Convert_To (RTE (RE_Interface_Tag), | |
83c6c069 | 7087 | New_Occurrence_Of (RTE (RE_Null_Address), Loc)))); |
f301a57b | 7088 | |
d00681a7 | 7089 | Set_Is_Statically_Allocated (Iface_DT_Ptr, |
7090 | Is_Library_Level_Tagged_Type (Typ)); | |
acf97c11 | 7091 | |
d00681a7 | 7092 | Next_Elmt (AI_Tag_Comp); |
7093 | end loop; | |
acf97c11 | 7094 | |
d00681a7 | 7095 | -- This is not a CPP_Class type |
acf97c11 | 7096 | |
d00681a7 | 7097 | else |
7098 | AI_Tag_Comp := First_Elmt (Typ_Comps); | |
7099 | while Present (AI_Tag_Comp) loop | |
7100 | Get_Secondary_DT_External_Name | |
7101 | (Typ, Related_Type (Node (AI_Tag_Comp)), Suffix_Index); | |
7102 | Typ_Name := Name_Find; | |
17e14451 | 7103 | |
d00681a7 | 7104 | if Building_Static_DT (Typ) then |
7105 | Iface_DT := | |
7106 | Make_Defining_Identifier (Loc, | |
2c011bc5 | 7107 | Chars => New_External_Name (Typ_Name, 'T')); |
d00681a7 | 7108 | Import_DT |
7109 | (Tag_Typ => Related_Type (Node (AI_Tag_Comp)), | |
7110 | DT => Iface_DT, | |
7111 | Is_Secondary_DT => True); | |
7112 | end if; | |
acf97c11 | 7113 | |
d00681a7 | 7114 | -- Secondary dispatch table referencing thunks to user-defined |
7115 | -- primitives covered by this interface. | |
acf97c11 | 7116 | |
d00681a7 | 7117 | Iface_DT_Ptr := |
7118 | Make_Defining_Identifier (Loc, | |
7119 | Chars => New_External_Name (Typ_Name, 'P')); | |
7120 | Set_Etype (Iface_DT_Ptr, RTE (RE_Interface_Tag)); | |
7121 | Set_Ekind (Iface_DT_Ptr, E_Constant); | |
7122 | Set_Is_Tag (Iface_DT_Ptr); | |
7123 | Set_Has_Thunks (Iface_DT_Ptr); | |
7124 | Set_Is_Statically_Allocated (Iface_DT_Ptr, | |
7125 | Is_Library_Level_Tagged_Type (Typ)); | |
7126 | Set_Is_True_Constant (Iface_DT_Ptr); | |
7127 | Set_Related_Type | |
7128 | (Iface_DT_Ptr, Related_Type (Node (AI_Tag_Comp))); | |
7129 | Append_Elmt (Iface_DT_Ptr, Access_Disp_Table (Typ)); | |
7130 | ||
7131 | if Building_Static_DT (Typ) then | |
7132 | Append_To (Result, | |
7133 | Make_Object_Declaration (Loc, | |
7134 | Defining_Identifier => Iface_DT_Ptr, | |
7135 | Constant_Present => True, | |
83c6c069 | 7136 | Object_Definition => New_Occurrence_Of |
d00681a7 | 7137 | (RTE (RE_Interface_Tag), Loc), |
4055a532 | 7138 | Expression => |
d00681a7 | 7139 | Unchecked_Convert_To (RTE (RE_Interface_Tag), |
7140 | Make_Attribute_Reference (Loc, | |
4055a532 | 7141 | Prefix => |
d00681a7 | 7142 | Make_Selected_Component (Loc, |
4055a532 | 7143 | Prefix => |
83c6c069 | 7144 | New_Occurrence_Of (Iface_DT, Loc), |
4055a532 | 7145 | Selector_Name => |
7146 | New_Occurrence_Of | |
7147 | (RTE_Record_Component (RE_Prims_Ptr), | |
7148 | Loc)), | |
d00681a7 | 7149 | Attribute_Name => Name_Address)))); |
7150 | end if; | |
7151 | ||
7152 | -- Secondary dispatch table referencing thunks to predefined | |
7153 | -- primitives. | |
7154 | ||
7155 | Iface_DT_Ptr := | |
7156 | Make_Defining_Identifier (Loc, | |
7157 | Chars => New_External_Name (Typ_Name, 'Y')); | |
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_Has_Thunks (Iface_DT_Ptr); | |
7162 | Set_Is_Statically_Allocated (Iface_DT_Ptr, | |
7163 | Is_Library_Level_Tagged_Type (Typ)); | |
7164 | Set_Is_True_Constant (Iface_DT_Ptr); | |
7165 | Set_Related_Type | |
7166 | (Iface_DT_Ptr, Related_Type (Node (AI_Tag_Comp))); | |
7167 | Append_Elmt (Iface_DT_Ptr, Access_Disp_Table (Typ)); | |
7168 | ||
7169 | -- Secondary dispatch table referencing user-defined primitives | |
7170 | -- covered by this interface. | |
7171 | ||
7172 | Iface_DT_Ptr := | |
7173 | Make_Defining_Identifier (Loc, | |
7174 | Chars => New_External_Name (Typ_Name, 'D')); | |
7175 | Set_Etype (Iface_DT_Ptr, RTE (RE_Interface_Tag)); | |
7176 | Set_Ekind (Iface_DT_Ptr, E_Constant); | |
7177 | Set_Is_Tag (Iface_DT_Ptr); | |
7178 | Set_Is_Statically_Allocated (Iface_DT_Ptr, | |
7179 | Is_Library_Level_Tagged_Type (Typ)); | |
7180 | Set_Is_True_Constant (Iface_DT_Ptr); | |
7181 | Set_Related_Type | |
7182 | (Iface_DT_Ptr, Related_Type (Node (AI_Tag_Comp))); | |
7183 | Append_Elmt (Iface_DT_Ptr, Access_Disp_Table (Typ)); | |
7184 | ||
7185 | -- Secondary dispatch table referencing predefined primitives | |
7186 | ||
7187 | Iface_DT_Ptr := | |
7188 | Make_Defining_Identifier (Loc, | |
7189 | Chars => New_External_Name (Typ_Name, 'Z')); | |
7190 | Set_Etype (Iface_DT_Ptr, RTE (RE_Address)); | |
7191 | Set_Ekind (Iface_DT_Ptr, E_Constant); | |
7192 | Set_Is_Tag (Iface_DT_Ptr); | |
7193 | Set_Is_Statically_Allocated (Iface_DT_Ptr, | |
7194 | Is_Library_Level_Tagged_Type (Typ)); | |
7195 | Set_Is_True_Constant (Iface_DT_Ptr); | |
7196 | Set_Related_Type | |
7197 | (Iface_DT_Ptr, Related_Type (Node (AI_Tag_Comp))); | |
7198 | Append_Elmt (Iface_DT_Ptr, Access_Disp_Table (Typ)); | |
7199 | ||
7200 | Next_Elmt (AI_Tag_Comp); | |
7201 | end loop; | |
7202 | end if; | |
17e14451 | 7203 | end if; |
7204 | ||
dffd0a90 | 7205 | -- 3) At the end of Access_Disp_Table, if the type has user-defined |
7206 | -- primitives, we add the entity of an access type declaration that | |
7207 | -- is used by Build_Get_Prim_Op_Address to expand dispatching calls | |
7208 | -- through the primary dispatch table. | |
7209 | ||
7210 | if UI_To_Int (DT_Entry_Count (First_Tag_Component (Typ))) = 0 then | |
7211 | Analyze_List (Result); | |
17e14451 | 7212 | |
7213 | -- Generate: | |
1d97d249 | 7214 | -- subtype Typ_DT is Address_Array (1 .. Nb_Prims); |
17e14451 | 7215 | -- type Typ_DT_Acc is access Typ_DT; |
7216 | ||
dffd0a90 | 7217 | else |
7218 | declare | |
7219 | Name_DT_Prims : constant Name_Id := | |
7220 | New_External_Name (Tname, 'G'); | |
7221 | Name_DT_Prims_Acc : constant Name_Id := | |
7222 | New_External_Name (Tname, 'H'); | |
7223 | DT_Prims : constant Entity_Id := | |
7224 | Make_Defining_Identifier (Loc, | |
7225 | Name_DT_Prims); | |
7226 | DT_Prims_Acc : constant Entity_Id := | |
7227 | Make_Defining_Identifier (Loc, | |
7228 | Name_DT_Prims_Acc); | |
7229 | begin | |
7230 | Append_To (Result, | |
1d97d249 | 7231 | Make_Subtype_Declaration (Loc, |
dffd0a90 | 7232 | Defining_Identifier => DT_Prims, |
1d97d249 | 7233 | Subtype_Indication => |
7234 | Make_Subtype_Indication (Loc, | |
7235 | Subtype_Mark => | |
7236 | New_Occurrence_Of (RTE (RE_Address_Array), Loc), | |
f81a201b | 7237 | Constraint => |
1d97d249 | 7238 | Make_Index_Or_Discriminant_Constraint (Loc, New_List ( |
7239 | Make_Range (Loc, | |
7240 | Low_Bound => Make_Integer_Literal (Loc, 1), | |
f81a201b | 7241 | High_Bound => |
7242 | Make_Integer_Literal (Loc, | |
7243 | DT_Entry_Count | |
7244 | (First_Tag_Component (Typ))))))))); | |
17e14451 | 7245 | |
dffd0a90 | 7246 | Append_To (Result, |
7247 | Make_Full_Type_Declaration (Loc, | |
7248 | Defining_Identifier => DT_Prims_Acc, | |
f81a201b | 7249 | Type_Definition => |
dffd0a90 | 7250 | Make_Access_To_Object_Definition (Loc, |
7251 | Subtype_Indication => | |
7252 | New_Occurrence_Of (DT_Prims, Loc)))); | |
17e14451 | 7253 | |
dffd0a90 | 7254 | Append_Elmt (DT_Prims_Acc, Access_Disp_Table (Typ)); |
17e14451 | 7255 | |
dffd0a90 | 7256 | -- Analyze the resulting list and suppress the generation of the |
7257 | -- Init_Proc associated with the above array declaration because | |
7258 | -- this type is never used in object declarations. It is only used | |
7259 | -- to simplify the expansion associated with dispatching calls. | |
17e14451 | 7260 | |
dffd0a90 | 7261 | Analyze_List (Result); |
649455a4 | 7262 | Set_Suppress_Initialization (Base_Type (DT_Prims)); |
cc60bd16 | 7263 | |
ff6293ec | 7264 | -- Disable backend optimizations based on assumptions about the |
7265 | -- aliasing status of objects designated by the access to the | |
7266 | -- dispatch table. Required to handle dispatch tables imported | |
7267 | -- from C++. | |
7268 | ||
7269 | Set_No_Strict_Aliasing (Base_Type (DT_Prims_Acc)); | |
7270 | ||
d00681a7 | 7271 | -- Add the freezing nodes of these declarations; required to avoid |
7272 | -- generating these freezing nodes in wrong scopes (for example in | |
7273 | -- the IC routine of a derivation of Typ). | |
02a2406d | 7274 | |
d03ada96 | 7275 | -- What is an "IC routine"? Is "init_proc" meant here??? |
d00681a7 | 7276 | |
d74fc39a | 7277 | Append_List_To (Result, Freeze_Entity (DT_Prims, Typ)); |
7278 | Append_List_To (Result, Freeze_Entity (DT_Prims_Acc, Typ)); | |
d00681a7 | 7279 | |
dffd0a90 | 7280 | -- Mark entity of dispatch table. Required by the back end to |
7281 | -- handle them properly. | |
cc60bd16 | 7282 | |
dffd0a90 | 7283 | Set_Is_Dispatch_Table_Entity (DT_Prims); |
7284 | end; | |
7285 | end if; | |
17e14451 | 7286 | |
11bd2f46 | 7287 | -- Mark entities of dispatch table. Required by the back end to handle |
7288 | -- them properly. | |
7640ed3d | 7289 | |
7290 | if Present (DT) then | |
7291 | Set_Is_Dispatch_Table_Entity (DT); | |
7292 | Set_Is_Dispatch_Table_Entity (Etype (DT)); | |
7293 | end if; | |
7294 | ||
d04be62f | 7295 | if Present (Iface_DT) then |
7296 | Set_Is_Dispatch_Table_Entity (Iface_DT); | |
7297 | Set_Is_Dispatch_Table_Entity (Etype (Iface_DT)); | |
7298 | end if; | |
7299 | ||
d00681a7 | 7300 | if Is_CPP_Class (Root_Type (Typ)) then |
7301 | Set_Ekind (DT_Ptr, E_Variable); | |
7302 | else | |
7303 | Set_Ekind (DT_Ptr, E_Constant); | |
7304 | end if; | |
7305 | ||
cdb1c38f | 7306 | Set_Is_Tag (DT_Ptr); |
7307 | Set_Related_Type (DT_Ptr, Typ); | |
7308 | ||
17e14451 | 7309 | return Result; |
7310 | end Make_Tags; | |
7311 | ||
cd534f03 | 7312 | --------------- |
7313 | -- New_Value -- | |
7314 | --------------- | |
7315 | ||
7316 | function New_Value (From : Node_Id) return Node_Id is | |
7317 | Res : constant Node_Id := Duplicate_Subexpr (From); | |
7318 | begin | |
7319 | if Is_Access_Type (Etype (From)) then | |
02a2406d | 7320 | return Make_Explicit_Dereference (Sloc (From), Prefix => Res); |
cd534f03 | 7321 | else |
7322 | return Res; | |
7323 | end if; | |
7324 | end New_Value; | |
7325 | ||
ee6ba406 | 7326 | ----------------------------------- |
7327 | -- Original_View_In_Visible_Part -- | |
7328 | ----------------------------------- | |
7329 | ||
7330 | function Original_View_In_Visible_Part (Typ : Entity_Id) return Boolean is | |
7331 | Scop : constant Entity_Id := Scope (Typ); | |
7332 | ||
7333 | begin | |
7334 | -- The scope must be a package | |
7335 | ||
65149aa0 | 7336 | if not Is_Package_Or_Generic_Package (Scop) then |
ee6ba406 | 7337 | return False; |
7338 | end if; | |
7339 | ||
7340 | -- A type with a private declaration has a private view declared in | |
7341 | -- the visible part. | |
7342 | ||
7343 | if Has_Private_Declaration (Typ) then | |
7344 | return True; | |
7345 | end if; | |
7346 | ||
7347 | return List_Containing (Parent (Typ)) = | |
e8b4793a | 7348 | Visible_Declarations (Package_Specification (Scop)); |
ee6ba406 | 7349 | end Original_View_In_Visible_Part; |
7350 | ||
d62940bf | 7351 | ------------------ |
7352 | -- Prim_Op_Kind -- | |
7353 | ------------------ | |
7354 | ||
7355 | function Prim_Op_Kind | |
7356 | (Prim : Entity_Id; | |
7357 | Typ : Entity_Id) return Node_Id | |
7358 | is | |
7359 | Full_Typ : Entity_Id := Typ; | |
7360 | Loc : constant Source_Ptr := Sloc (Prim); | |
68f95949 | 7361 | Prim_Op : Entity_Id; |
d62940bf | 7362 | |
7363 | begin | |
7364 | -- Retrieve the original primitive operation | |
7365 | ||
fc2907f6 | 7366 | Prim_Op := Ultimate_Alias (Prim); |
d62940bf | 7367 | |
7368 | if Ekind (Typ) = E_Record_Type | |
7369 | and then Present (Corresponding_Concurrent_Type (Typ)) | |
7370 | then | |
7371 | Full_Typ := Corresponding_Concurrent_Type (Typ); | |
7372 | end if; | |
7373 | ||
d77e048b | 7374 | -- When a private tagged type is completed by a concurrent type, |
7375 | -- retrieve the full view. | |
7376 | ||
7377 | if Is_Private_Type (Full_Typ) then | |
7378 | Full_Typ := Full_View (Full_Typ); | |
7379 | end if; | |
7380 | ||
d62940bf | 7381 | if Ekind (Prim_Op) = E_Function then |
7382 | ||
7383 | -- Protected function | |
7384 | ||
7385 | if Ekind (Full_Typ) = E_Protected_Type then | |
83c6c069 | 7386 | return New_Occurrence_Of (RTE (RE_POK_Protected_Function), Loc); |
d62940bf | 7387 | |
76a1c25b | 7388 | -- Task function |
7389 | ||
7390 | elsif Ekind (Full_Typ) = E_Task_Type then | |
83c6c069 | 7391 | return New_Occurrence_Of (RTE (RE_POK_Task_Function), Loc); |
76a1c25b | 7392 | |
d62940bf | 7393 | -- Regular function |
7394 | ||
7395 | else | |
83c6c069 | 7396 | return New_Occurrence_Of (RTE (RE_POK_Function), Loc); |
d62940bf | 7397 | end if; |
7398 | ||
7399 | else | |
7400 | pragma Assert (Ekind (Prim_Op) = E_Procedure); | |
7401 | ||
7402 | if Ekind (Full_Typ) = E_Protected_Type then | |
7403 | ||
7404 | -- Protected entry | |
7405 | ||
7406 | if Is_Primitive_Wrapper (Prim_Op) | |
7407 | and then Ekind (Wrapped_Entity (Prim_Op)) = E_Entry | |
7408 | then | |
83c6c069 | 7409 | return New_Occurrence_Of (RTE (RE_POK_Protected_Entry), Loc); |
d62940bf | 7410 | |
7411 | -- Protected procedure | |
7412 | ||
7413 | else | |
83c6c069 | 7414 | return |
7415 | New_Occurrence_Of (RTE (RE_POK_Protected_Procedure), Loc); | |
d62940bf | 7416 | end if; |
7417 | ||
7418 | elsif Ekind (Full_Typ) = E_Task_Type then | |
7419 | ||
7420 | -- Task entry | |
7421 | ||
7422 | if Is_Primitive_Wrapper (Prim_Op) | |
7423 | and then Ekind (Wrapped_Entity (Prim_Op)) = E_Entry | |
7424 | then | |
83c6c069 | 7425 | return New_Occurrence_Of (RTE (RE_POK_Task_Entry), Loc); |
d62940bf | 7426 | |
7427 | -- Task "procedure". These are the internally Expander-generated | |
7428 | -- procedures (task body for instance). | |
7429 | ||
7430 | else | |
83c6c069 | 7431 | return New_Occurrence_Of (RTE (RE_POK_Task_Procedure), Loc); |
d62940bf | 7432 | end if; |
7433 | ||
7434 | -- Regular procedure | |
7435 | ||
7436 | else | |
83c6c069 | 7437 | return New_Occurrence_Of (RTE (RE_POK_Procedure), Loc); |
d62940bf | 7438 | end if; |
7439 | end if; | |
7440 | end Prim_Op_Kind; | |
7441 | ||
725a69d2 | 7442 | ------------------------ |
7443 | -- Register_Primitive -- | |
7444 | ------------------------ | |
7445 | ||
49260fa5 | 7446 | function Register_Primitive |
725a69d2 | 7447 | (Loc : Source_Ptr; |
49260fa5 | 7448 | Prim : Entity_Id) return List_Id |
725a69d2 | 7449 | is |
cdb1c38f | 7450 | DT_Ptr : Entity_Id; |
7451 | Iface_Prim : Entity_Id; | |
7452 | Iface_Typ : Entity_Id; | |
7453 | Iface_DT_Ptr : Entity_Id; | |
7454 | Iface_DT_Elmt : Elmt_Id; | |
49260fa5 | 7455 | L : constant List_Id := New_List; |
cdb1c38f | 7456 | Pos : Uint; |
7457 | Tag : Entity_Id; | |
cc60bd16 | 7458 | Tag_Typ : Entity_Id; |
cdb1c38f | 7459 | Thunk_Id : Entity_Id; |
7460 | Thunk_Code : Node_Id; | |
725a69d2 | 7461 | |
7462 | begin | |
7463 | pragma Assert (not Restriction_Active (No_Dispatching_Calls)); | |
7464 | ||
3f8cf2d2 | 7465 | -- Do not register in the dispatch table eliminated primitives |
7466 | ||
7467 | if not RTE_Available (RE_Tag) | |
7468 | or else Is_Eliminated (Ultimate_Alias (Prim)) | |
83d39cd3 | 7469 | or else Generate_SCIL |
3f8cf2d2 | 7470 | then |
49260fa5 | 7471 | return L; |
725a69d2 | 7472 | end if; |
7473 | ||
a652dd51 | 7474 | if not Present (Interface_Alias (Prim)) then |
cc60bd16 | 7475 | Tag_Typ := Scope (DTC_Entity (Prim)); |
acf97c11 | 7476 | Pos := DT_Position (Prim); |
cc60bd16 | 7477 | Tag := First_Tag_Component (Tag_Typ); |
725a69d2 | 7478 | |
7479 | if Is_Predefined_Dispatching_Operation (Prim) | |
7480 | or else Is_Predefined_Dispatching_Alias (Prim) | |
7481 | then | |
cc60bd16 | 7482 | DT_Ptr := |
7483 | Node (Next_Elmt (First_Elmt (Access_Disp_Table (Tag_Typ)))); | |
7484 | ||
49260fa5 | 7485 | Append_To (L, |
725a69d2 | 7486 | Build_Set_Predefined_Prim_Op_Address (Loc, |
83c6c069 | 7487 | Tag_Node => New_Occurrence_Of (DT_Ptr, Loc), |
725a69d2 | 7488 | Position => Pos, |
acf97c11 | 7489 | Address_Node => |
cc60bd16 | 7490 | Unchecked_Convert_To (RTE (RE_Prim_Ptr), |
acf97c11 | 7491 | Make_Attribute_Reference (Loc, |
83c6c069 | 7492 | Prefix => New_Occurrence_Of (Prim, Loc), |
acf97c11 | 7493 | Attribute_Name => Name_Unrestricted_Access)))); |
725a69d2 | 7494 | |
9e7de1e1 | 7495 | -- Register copy of the pointer to the 'size primitive in the TSD |
cc60bd16 | 7496 | |
7497 | if Chars (Prim) = Name_uSize | |
7498 | and then RTE_Record_Component_Available (RE_Size_Func) | |
7499 | then | |
7500 | DT_Ptr := Node (First_Elmt (Access_Disp_Table (Tag_Typ))); | |
49260fa5 | 7501 | Append_To (L, |
cc60bd16 | 7502 | Build_Set_Size_Function (Loc, |
83c6c069 | 7503 | Tag_Node => New_Occurrence_Of (DT_Ptr, Loc), |
cc60bd16 | 7504 | Size_Func => Prim)); |
7505 | end if; | |
7506 | ||
725a69d2 | 7507 | else |
7508 | pragma Assert (Pos /= Uint_0 and then Pos <= DT_Entry_Count (Tag)); | |
7509 | ||
d00681a7 | 7510 | -- Skip registration of primitives located in the C++ part of the |
7511 | -- dispatch table. Their slot is set by the IC routine. | |
7512 | ||
7513 | if not Is_CPP_Class (Root_Type (Tag_Typ)) | |
7514 | or else Pos > CPP_Num_Prims (Tag_Typ) | |
7515 | then | |
7516 | DT_Ptr := Node (First_Elmt (Access_Disp_Table (Tag_Typ))); | |
7517 | Append_To (L, | |
7518 | Build_Set_Prim_Op_Address (Loc, | |
7519 | Typ => Tag_Typ, | |
83c6c069 | 7520 | Tag_Node => New_Occurrence_Of (DT_Ptr, Loc), |
d00681a7 | 7521 | Position => Pos, |
7522 | Address_Node => | |
7523 | Unchecked_Convert_To (RTE (RE_Prim_Ptr), | |
7524 | Make_Attribute_Reference (Loc, | |
83c6c069 | 7525 | Prefix => New_Occurrence_Of (Prim, Loc), |
d00681a7 | 7526 | Attribute_Name => Name_Unrestricted_Access)))); |
7527 | end if; | |
725a69d2 | 7528 | end if; |
7529 | ||
7530 | -- Ada 2005 (AI-251): Primitive associated with an interface type | |
02a2406d | 7531 | |
725a69d2 | 7532 | -- Generate the code of the thunk only if the interface type is not an |
7533 | -- immediate ancestor of Typ; otherwise the dispatch table associated | |
7534 | -- with the interface is the primary dispatch table and we have nothing | |
7535 | -- else to do here. | |
7536 | ||
7537 | else | |
cc60bd16 | 7538 | Tag_Typ := Find_Dispatching_Type (Alias (Prim)); |
a652dd51 | 7539 | Iface_Typ := Find_Dispatching_Type (Interface_Alias (Prim)); |
725a69d2 | 7540 | |
7541 | pragma Assert (Is_Interface (Iface_Typ)); | |
7542 | ||
c8da6114 | 7543 | -- No action needed for interfaces that are ancestors of Typ because |
7544 | -- their primitives are located in the primary dispatch table. | |
7545 | ||
cb4af01d | 7546 | if Is_Ancestor (Iface_Typ, Tag_Typ, Use_Full_View => True) then |
c8da6114 | 7547 | return L; |
d00681a7 | 7548 | |
7549 | -- No action needed for primitives located in the C++ part of the | |
7550 | -- dispatch table. Their slot is set by the IC routine. | |
7551 | ||
7552 | elsif Is_CPP_Class (Root_Type (Tag_Typ)) | |
7553 | and then DT_Position (Alias (Prim)) <= CPP_Num_Prims (Tag_Typ) | |
7554 | and then not Is_Predefined_Dispatching_Operation (Prim) | |
7555 | and then not Is_Predefined_Dispatching_Alias (Prim) | |
7556 | then | |
7557 | return L; | |
c8da6114 | 7558 | end if; |
7559 | ||
17e14451 | 7560 | Expand_Interface_Thunk (Prim, Thunk_Id, Thunk_Code); |
725a69d2 | 7561 | |
cb4af01d | 7562 | if not Is_Ancestor (Iface_Typ, Tag_Typ, Use_Full_View => True) |
725a69d2 | 7563 | and then Present (Thunk_Code) |
7564 | then | |
725a69d2 | 7565 | -- Generate the code necessary to fill the appropriate entry of |
7566 | -- the secondary dispatch table of Prim's controlling type with | |
7567 | -- Thunk_Id's address. | |
7568 | ||
cc60bd16 | 7569 | Iface_DT_Elmt := Find_Interface_ADT (Tag_Typ, Iface_Typ); |
cdb1c38f | 7570 | Iface_DT_Ptr := Node (Iface_DT_Elmt); |
7571 | pragma Assert (Has_Thunks (Iface_DT_Ptr)); | |
7572 | ||
a652dd51 | 7573 | Iface_Prim := Interface_Alias (Prim); |
acf97c11 | 7574 | Pos := DT_Position (Iface_Prim); |
7575 | Tag := First_Tag_Component (Iface_Typ); | |
49260fa5 | 7576 | |
7577 | Prepend_To (L, Thunk_Code); | |
725a69d2 | 7578 | |
7579 | if Is_Predefined_Dispatching_Operation (Prim) | |
7580 | or else Is_Predefined_Dispatching_Alias (Prim) | |
7581 | then | |
cdb1c38f | 7582 | Append_To (L, |
725a69d2 | 7583 | Build_Set_Predefined_Prim_Op_Address (Loc, |
acf97c11 | 7584 | Tag_Node => |
83c6c069 | 7585 | New_Occurrence_Of (Node (Next_Elmt (Iface_DT_Elmt)), Loc), |
725a69d2 | 7586 | Position => Pos, |
7587 | Address_Node => | |
cc60bd16 | 7588 | Unchecked_Convert_To (RTE (RE_Prim_Ptr), |
acf97c11 | 7589 | Make_Attribute_Reference (Loc, |
83c6c069 | 7590 | Prefix => New_Occurrence_Of (Thunk_Id, Loc), |
acf97c11 | 7591 | Attribute_Name => Name_Unrestricted_Access)))); |
cdb1c38f | 7592 | |
acf97c11 | 7593 | Next_Elmt (Iface_DT_Elmt); |
cdb1c38f | 7594 | Next_Elmt (Iface_DT_Elmt); |
7595 | Iface_DT_Ptr := Node (Iface_DT_Elmt); | |
7596 | pragma Assert (not Has_Thunks (Iface_DT_Ptr)); | |
7597 | ||
7598 | Append_To (L, | |
7599 | Build_Set_Predefined_Prim_Op_Address (Loc, | |
acf97c11 | 7600 | Tag_Node => |
83c6c069 | 7601 | New_Occurrence_Of (Node (Next_Elmt (Iface_DT_Elmt)), Loc), |
cdb1c38f | 7602 | Position => Pos, |
7603 | Address_Node => | |
cc60bd16 | 7604 | Unchecked_Convert_To (RTE (RE_Prim_Ptr), |
acf97c11 | 7605 | Make_Attribute_Reference (Loc, |
4055a532 | 7606 | Prefix => |
83c6c069 | 7607 | New_Occurrence_Of (Alias (Prim), Loc), |
acf97c11 | 7608 | Attribute_Name => Name_Unrestricted_Access)))); |
cdb1c38f | 7609 | |
725a69d2 | 7610 | else |
7611 | pragma Assert (Pos /= Uint_0 | |
7612 | and then Pos <= DT_Entry_Count (Tag)); | |
7613 | ||
cdb1c38f | 7614 | Append_To (L, |
7615 | Build_Set_Prim_Op_Address (Loc, | |
7616 | Typ => Iface_Typ, | |
83c6c069 | 7617 | Tag_Node => New_Occurrence_Of (Iface_DT_Ptr, Loc), |
cdb1c38f | 7618 | Position => Pos, |
acf97c11 | 7619 | Address_Node => |
cc60bd16 | 7620 | Unchecked_Convert_To (RTE (RE_Prim_Ptr), |
acf97c11 | 7621 | Make_Attribute_Reference (Loc, |
83c6c069 | 7622 | Prefix => New_Occurrence_Of (Thunk_Id, Loc), |
acf97c11 | 7623 | Attribute_Name => Name_Unrestricted_Access)))); |
cdb1c38f | 7624 | |
acf97c11 | 7625 | Next_Elmt (Iface_DT_Elmt); |
cdb1c38f | 7626 | Next_Elmt (Iface_DT_Elmt); |
7627 | Iface_DT_Ptr := Node (Iface_DT_Elmt); | |
7628 | pragma Assert (not Has_Thunks (Iface_DT_Ptr)); | |
7629 | ||
7630 | Append_To (L, | |
725a69d2 | 7631 | Build_Set_Prim_Op_Address (Loc, |
7632 | Typ => Iface_Typ, | |
83c6c069 | 7633 | Tag_Node => New_Occurrence_Of (Iface_DT_Ptr, Loc), |
725a69d2 | 7634 | Position => Pos, |
acf97c11 | 7635 | Address_Node => |
cc60bd16 | 7636 | Unchecked_Convert_To (RTE (RE_Prim_Ptr), |
acf97c11 | 7637 | Make_Attribute_Reference (Loc, |
4055a532 | 7638 | Prefix => |
83c6c069 | 7639 | New_Occurrence_Of (Alias (Prim), Loc), |
acf97c11 | 7640 | Attribute_Name => Name_Unrestricted_Access)))); |
cdb1c38f | 7641 | |
725a69d2 | 7642 | end if; |
7643 | end if; | |
7644 | end if; | |
49260fa5 | 7645 | |
7646 | return L; | |
725a69d2 | 7647 | end Register_Primitive; |
7648 | ||
ee6ba406 | 7649 | ------------------------- |
7650 | -- Set_All_DT_Position -- | |
7651 | ------------------------- | |
7652 | ||
7653 | procedure Set_All_DT_Position (Typ : Entity_Id) is | |
ee6ba406 | 7654 | |
cf365b48 | 7655 | function In_Predef_Prims_DT (Prim : Entity_Id) return Boolean; |
7656 | -- Returns True if Prim is located in the dispatch table of | |
7657 | -- predefined primitives | |
7658 | ||
aad6babd | 7659 | procedure Validate_Position (Prim : Entity_Id); |
02a2406d | 7660 | -- Check that position assigned to Prim is completely safe (it has not |
7661 | -- been assigned to a previously defined primitive operation of Typ). | |
aad6babd | 7662 | |
cf365b48 | 7663 | ------------------------ |
7664 | -- In_Predef_Prims_DT -- | |
7665 | ------------------------ | |
7666 | ||
7667 | function In_Predef_Prims_DT (Prim : Entity_Id) return Boolean is | |
cf365b48 | 7668 | begin |
7669 | -- Predefined primitives | |
7670 | ||
7671 | if Is_Predefined_Dispatching_Operation (Prim) then | |
7672 | return True; | |
7673 | ||
7674 | -- Renamings of predefined primitives | |
7675 | ||
7676 | elsif Present (Alias (Prim)) | |
7677 | and then Is_Predefined_Dispatching_Operation (Ultimate_Alias (Prim)) | |
7678 | then | |
7679 | if Chars (Ultimate_Alias (Prim)) /= Name_Op_Eq then | |
7680 | return True; | |
7681 | ||
4835ef4c | 7682 | -- An overriding operation that is a user-defined renaming of |
7683 | -- predefined equality inherits its slot from the overridden | |
7684 | -- operation. Otherwise it is treated as a predefined op and | |
7685 | -- occupies the same predefined slot as equality. A call to it is | |
7686 | -- transformed into a call to its alias, which is the predefined | |
7687 | -- equality op. A dispatching call thus uses the proper slot if | |
7688 | -- operation is further inherited and called with class-wide | |
7689 | -- arguments. | |
cf365b48 | 7690 | |
7691 | else | |
4835ef4c | 7692 | return |
7693 | not Comes_From_Source (Prim) | |
7694 | or else No (Overridden_Operation (Prim)); | |
cf365b48 | 7695 | end if; |
7696 | ||
7697 | -- User-defined primitives | |
7698 | ||
7699 | else | |
7700 | return False; | |
7701 | end if; | |
7702 | end In_Predef_Prims_DT; | |
7703 | ||
aad6babd | 7704 | ----------------------- |
7705 | -- Validate_Position -- | |
7706 | ----------------------- | |
7707 | ||
7708 | procedure Validate_Position (Prim : Entity_Id) is | |
af647dc7 | 7709 | Op_Elmt : Elmt_Id; |
7710 | Op : Entity_Id; | |
d62940bf | 7711 | |
aad6babd | 7712 | begin |
af647dc7 | 7713 | -- Aliased primitives are safe |
7714 | ||
7715 | if Present (Alias (Prim)) then | |
7716 | return; | |
7717 | end if; | |
7718 | ||
7719 | Op_Elmt := First_Elmt (Primitive_Operations (Typ)); | |
7720 | while Present (Op_Elmt) loop | |
7721 | Op := Node (Op_Elmt); | |
7722 | ||
7723 | -- No need to check against itself | |
7724 | ||
7725 | if Op = Prim then | |
7726 | null; | |
7727 | ||
aad6babd | 7728 | -- Primitive operations covering abstract interfaces are |
7729 | -- allocated later | |
7730 | ||
a652dd51 | 7731 | elsif Present (Interface_Alias (Op)) then |
aad6babd | 7732 | null; |
7733 | ||
68f95949 | 7734 | -- Predefined dispatching operations are completely safe. They |
7735 | -- are allocated at fixed positions in a separate table. | |
aad6babd | 7736 | |
af647dc7 | 7737 | elsif Is_Predefined_Dispatching_Operation (Op) |
7738 | or else Is_Predefined_Dispatching_Alias (Op) | |
7739 | then | |
aad6babd | 7740 | null; |
ee6ba406 | 7741 | |
aad6babd | 7742 | -- Aliased subprograms are safe |
7743 | ||
af647dc7 | 7744 | elsif Present (Alias (Op)) then |
aad6babd | 7745 | null; |
7746 | ||
af647dc7 | 7747 | elsif DT_Position (Op) = DT_Position (Prim) |
7748 | and then not Is_Predefined_Dispatching_Operation (Op) | |
7749 | and then not Is_Predefined_Dispatching_Operation (Prim) | |
7750 | and then not Is_Predefined_Dispatching_Alias (Op) | |
7751 | and then not Is_Predefined_Dispatching_Alias (Prim) | |
7752 | then | |
d62940bf | 7753 | -- Handle aliased subprograms |
7754 | ||
7755 | declare | |
7756 | Op_1 : Entity_Id; | |
7757 | Op_2 : Entity_Id; | |
7758 | ||
7759 | begin | |
af647dc7 | 7760 | Op_1 := Op; |
d62940bf | 7761 | loop |
7762 | if Present (Overridden_Operation (Op_1)) then | |
7763 | Op_1 := Overridden_Operation (Op_1); | |
7764 | elsif Present (Alias (Op_1)) then | |
7765 | Op_1 := Alias (Op_1); | |
7766 | else | |
7767 | exit; | |
7768 | end if; | |
7769 | end loop; | |
7770 | ||
7771 | Op_2 := Prim; | |
7772 | loop | |
7773 | if Present (Overridden_Operation (Op_2)) then | |
7774 | Op_2 := Overridden_Operation (Op_2); | |
7775 | elsif Present (Alias (Op_2)) then | |
7776 | Op_2 := Alias (Op_2); | |
7777 | else | |
7778 | exit; | |
7779 | end if; | |
7780 | end loop; | |
7781 | ||
7782 | if Op_1 /= Op_2 then | |
7783 | raise Program_Error; | |
7784 | end if; | |
7785 | end; | |
aad6babd | 7786 | end if; |
7787 | ||
af647dc7 | 7788 | Next_Elmt (Op_Elmt); |
aad6babd | 7789 | end loop; |
7790 | end Validate_Position; | |
7791 | ||
af647dc7 | 7792 | -- Local variables |
7793 | ||
7794 | Parent_Typ : constant Entity_Id := Etype (Typ); | |
af647dc7 | 7795 | First_Prim : constant Elmt_Id := First_Elmt (Primitive_Operations (Typ)); |
7796 | The_Tag : constant Entity_Id := First_Tag_Component (Typ); | |
7797 | ||
651a38ec | 7798 | Adjusted : Boolean := False; |
7799 | Finalized : Boolean := False; | |
af647dc7 | 7800 | |
343d35dc | 7801 | Count_Prim : Nat; |
7802 | DT_Length : Nat; | |
7803 | Nb_Prim : Nat; | |
af647dc7 | 7804 | Prim : Entity_Id; |
7805 | Prim_Elmt : Elmt_Id; | |
7806 | ||
aad6babd | 7807 | -- Start of processing for Set_All_DT_Position |
7808 | ||
7809 | begin | |
a652dd51 | 7810 | pragma Assert (Present (First_Tag_Component (Typ))); |
7811 | ||
b3dd22b3 | 7812 | -- Set the DT_Position for each primitive operation. Perform some sanity |
7813 | -- checks to avoid building inconsistent dispatch tables. | |
ee6ba406 | 7814 | |
02a2406d | 7815 | -- First stage: Set DTC entity of all the primitive operations. This is |
7816 | -- required to properly read the DT_Position attribute in latter stages. | |
ee6ba406 | 7817 | |
343d35dc | 7818 | Prim_Elmt := First_Prim; |
7819 | Count_Prim := 0; | |
7820 | while Present (Prim_Elmt) loop | |
7821 | Prim := Node (Prim_Elmt); | |
ee6ba406 | 7822 | |
343d35dc | 7823 | -- Predefined primitives have a separate dispatch table |
ee6ba406 | 7824 | |
cf365b48 | 7825 | if not In_Predef_Prims_DT (Prim) then |
343d35dc | 7826 | Count_Prim := Count_Prim + 1; |
7827 | end if; | |
ee6ba406 | 7828 | |
725a69d2 | 7829 | Set_DTC_Entity_Value (Typ, Prim); |
ee6ba406 | 7830 | |
343d35dc | 7831 | -- Clear any previous value of the DT_Position attribute. In this |
7832 | -- way we ensure that the final position of all the primitives is | |
36b938a3 | 7833 | -- established by the following stages of this algorithm. |
ee6ba406 | 7834 | |
ad274a73 | 7835 | Set_DT_Position_Value (Prim, No_Uint); |
ee6ba406 | 7836 | |
343d35dc | 7837 | Next_Elmt (Prim_Elmt); |
7838 | end loop; | |
ee6ba406 | 7839 | |
343d35dc | 7840 | declare |
acf97c11 | 7841 | Fixed_Prim : array (Int range 0 .. Count_Prim) of Boolean := |
7842 | (others => False); | |
7843 | ||
343d35dc | 7844 | E : Entity_Id; |
ee6ba406 | 7845 | |
725a69d2 | 7846 | procedure Handle_Inherited_Private_Subprograms (Typ : Entity_Id); |
7847 | -- Called if Typ is declared in a nested package or a public child | |
7848 | -- package to handle inherited primitives that were inherited by Typ | |
509f74d3 | 7849 | -- in the visible part, but whose declaration was deferred because |
725a69d2 | 7850 | -- the parent operation was private and not visible at that point. |
7851 | ||
343d35dc | 7852 | procedure Set_Fixed_Prim (Pos : Nat); |
7853 | -- Sets to true an element of the Fixed_Prim table to indicate | |
7854 | -- that this entry of the dispatch table of Typ is occupied. | |
ee6ba406 | 7855 | |
725a69d2 | 7856 | ------------------------------------------ |
7857 | -- Handle_Inherited_Private_Subprograms -- | |
7858 | ------------------------------------------ | |
7859 | ||
7860 | procedure Handle_Inherited_Private_Subprograms (Typ : Entity_Id) is | |
7861 | Op_List : Elist_Id; | |
7862 | Op_Elmt : Elmt_Id; | |
7863 | Op_Elmt_2 : Elmt_Id; | |
7864 | Prim_Op : Entity_Id; | |
7865 | Parent_Subp : Entity_Id; | |
7866 | ||
7867 | begin | |
7868 | Op_List := Primitive_Operations (Typ); | |
7869 | ||
7870 | Op_Elmt := First_Elmt (Op_List); | |
7871 | while Present (Op_Elmt) loop | |
7872 | Prim_Op := Node (Op_Elmt); | |
7873 | ||
7874 | -- Search primitives that are implicit operations with an | |
7875 | -- internal name whose parent operation has a normal name. | |
7876 | ||
7877 | if Present (Alias (Prim_Op)) | |
7878 | and then Find_Dispatching_Type (Alias (Prim_Op)) /= Typ | |
7879 | and then not Comes_From_Source (Prim_Op) | |
7880 | and then Is_Internal_Name (Chars (Prim_Op)) | |
7881 | and then not Is_Internal_Name (Chars (Alias (Prim_Op))) | |
7882 | then | |
7883 | Parent_Subp := Alias (Prim_Op); | |
7884 | ||
7885 | -- Check if the type has an explicit overriding for this | |
7886 | -- primitive. | |
7887 | ||
7888 | Op_Elmt_2 := Next_Elmt (Op_Elmt); | |
7889 | while Present (Op_Elmt_2) loop | |
7890 | if Chars (Node (Op_Elmt_2)) = Chars (Parent_Subp) | |
7891 | and then Type_Conformant (Prim_Op, Node (Op_Elmt_2)) | |
7892 | then | |
ad274a73 | 7893 | Set_DT_Position_Value (Prim_Op, |
7894 | DT_Position (Parent_Subp)); | |
7895 | Set_DT_Position_Value (Node (Op_Elmt_2), | |
725a69d2 | 7896 | DT_Position (Parent_Subp)); |
7897 | Set_Fixed_Prim (UI_To_Int (DT_Position (Prim_Op))); | |
7898 | ||
7899 | goto Next_Primitive; | |
7900 | end if; | |
7901 | ||
7902 | Next_Elmt (Op_Elmt_2); | |
7903 | end loop; | |
7904 | end if; | |
7905 | ||
7906 | <<Next_Primitive>> | |
7907 | Next_Elmt (Op_Elmt); | |
7908 | end loop; | |
7909 | end Handle_Inherited_Private_Subprograms; | |
7910 | ||
343d35dc | 7911 | -------------------- |
7912 | -- Set_Fixed_Prim -- | |
7913 | -------------------- | |
ee6ba406 | 7914 | |
343d35dc | 7915 | procedure Set_Fixed_Prim (Pos : Nat) is |
ee6ba406 | 7916 | begin |
9e7de1e1 | 7917 | pragma Assert (Pos <= Count_Prim); |
343d35dc | 7918 | Fixed_Prim (Pos) := True; |
7919 | exception | |
7920 | when Constraint_Error => | |
7921 | raise Program_Error; | |
7922 | end Set_Fixed_Prim; | |
ee6ba406 | 7923 | |
343d35dc | 7924 | begin |
725a69d2 | 7925 | -- In case of nested packages and public child package it may be |
7926 | -- necessary a special management on inherited subprograms so that | |
7927 | -- the dispatch table is properly filled. | |
7928 | ||
7929 | if Ekind (Scope (Scope (Typ))) = E_Package | |
7930 | and then Scope (Scope (Typ)) /= Standard_Standard | |
7931 | and then ((Is_Derived_Type (Typ) and then not Is_Private_Type (Typ)) | |
7932 | or else | |
7933 | (Nkind (Parent (Typ)) = N_Private_Extension_Declaration | |
7934 | and then Is_Generic_Type (Typ))) | |
7935 | and then In_Open_Scopes (Scope (Etype (Typ))) | |
5b990e08 | 7936 | and then Is_Base_Type (Typ) |
725a69d2 | 7937 | then |
7938 | Handle_Inherited_Private_Subprograms (Typ); | |
7939 | end if; | |
7940 | ||
343d35dc | 7941 | -- Second stage: Register fixed entries |
ee6ba406 | 7942 | |
343d35dc | 7943 | Nb_Prim := 0; |
7944 | Prim_Elmt := First_Prim; | |
7945 | while Present (Prim_Elmt) loop | |
7946 | Prim := Node (Prim_Elmt); | |
ee6ba406 | 7947 | |
343d35dc | 7948 | -- Predefined primitives have a separate table and all its |
7949 | -- entries are at predefined fixed positions. | |
ee6ba406 | 7950 | |
cf365b48 | 7951 | if In_Predef_Prims_DT (Prim) then |
7952 | if Is_Predefined_Dispatching_Operation (Prim) then | |
ad274a73 | 7953 | Set_DT_Position_Value (Prim, |
7954 | Default_Prim_Op_Position (Prim)); | |
ee6ba406 | 7955 | |
cf365b48 | 7956 | else pragma Assert (Present (Alias (Prim))); |
ad274a73 | 7957 | Set_DT_Position_Value (Prim, |
cf365b48 | 7958 | Default_Prim_Op_Position (Ultimate_Alias (Prim))); |
7959 | end if; | |
d62940bf | 7960 | |
343d35dc | 7961 | -- Overriding primitives of ancestor abstract interfaces |
ee6ba406 | 7962 | |
a652dd51 | 7963 | elsif Present (Interface_Alias (Prim)) |
7964 | and then Is_Ancestor | |
cb4af01d | 7965 | (Find_Dispatching_Type (Interface_Alias (Prim)), Typ, |
7966 | Use_Full_View => True) | |
343d35dc | 7967 | then |
7968 | pragma Assert (DT_Position (Prim) = No_Uint | |
a652dd51 | 7969 | and then Present (DTC_Entity (Interface_Alias (Prim)))); |
ee6ba406 | 7970 | |
a652dd51 | 7971 | E := Interface_Alias (Prim); |
ad274a73 | 7972 | Set_DT_Position_Value (Prim, DT_Position (E)); |
aad6babd | 7973 | |
343d35dc | 7974 | pragma Assert |
7975 | (DT_Position (Alias (Prim)) = No_Uint | |
7976 | or else DT_Position (Alias (Prim)) = DT_Position (E)); | |
ad274a73 | 7977 | Set_DT_Position_Value (Alias (Prim), DT_Position (E)); |
343d35dc | 7978 | Set_Fixed_Prim (UI_To_Int (DT_Position (Prim))); |
af647dc7 | 7979 | |
ed7f78d7 | 7980 | -- Overriding primitives must use the same entry as the overridden |
7981 | -- primitive. Note that the Alias of the operation is set when the | |
7982 | -- operation is declared by a renaming, in which case it is not | |
7983 | -- overriding. If it renames another primitive it will use the | |
7984 | -- same dispatch table slot, but if it renames an operation in a | |
7985 | -- nested package it's a new primitive and will have its own slot. | |
af647dc7 | 7986 | |
a652dd51 | 7987 | elsif not Present (Interface_Alias (Prim)) |
343d35dc | 7988 | and then Present (Alias (Prim)) |
17e14451 | 7989 | and then Chars (Prim) = Chars (Alias (Prim)) |
ed7f78d7 | 7990 | and then Nkind (Unit_Declaration_Node (Prim)) /= |
7991 | N_Subprogram_Renaming_Declaration | |
af647dc7 | 7992 | then |
ed7f78d7 | 7993 | declare |
7994 | Par_Type : constant Entity_Id := | |
78f327e2 | 7995 | Find_Dispatching_Type (Alias (Prim)); |
7996 | ||
ed7f78d7 | 7997 | begin |
7998 | if Present (Par_Type) | |
7999 | and then Par_Type /= Typ | |
8000 | and then Is_Ancestor (Par_Type, Typ, Use_Full_View => True) | |
8001 | and then Present (DTC_Entity (Alias (Prim))) | |
8002 | then | |
8003 | E := Alias (Prim); | |
8004 | Set_DT_Position_Value (Prim, DT_Position (E)); | |
aad6babd | 8005 | |
ed7f78d7 | 8006 | if not Is_Predefined_Dispatching_Alias (E) then |
8007 | Set_Fixed_Prim (UI_To_Int (DT_Position (E))); | |
8008 | end if; | |
8009 | end if; | |
8010 | end; | |
9dfe12ae | 8011 | end if; |
ee6ba406 | 8012 | |
aad6babd | 8013 | Next_Elmt (Prim_Elmt); |
8014 | end loop; | |
8015 | ||
02a2406d | 8016 | -- Third stage: Fix the position of all the new primitives. Entries |
8017 | -- associated with primitives covering interfaces are handled in a | |
8018 | -- latter round. | |
aad6babd | 8019 | |
343d35dc | 8020 | Prim_Elmt := First_Prim; |
8021 | while Present (Prim_Elmt) loop | |
8022 | Prim := Node (Prim_Elmt); | |
aad6babd | 8023 | |
343d35dc | 8024 | -- Skip primitives previously set entries |
aad6babd | 8025 | |
343d35dc | 8026 | if DT_Position (Prim) /= No_Uint then |
8027 | null; | |
aad6babd | 8028 | |
343d35dc | 8029 | -- Primitives covering interface primitives are handled later |
aad6babd | 8030 | |
a652dd51 | 8031 | elsif Present (Interface_Alias (Prim)) then |
343d35dc | 8032 | null; |
aad6babd | 8033 | |
343d35dc | 8034 | else |
8035 | -- Take the next available position in the DT | |
aad6babd | 8036 | |
343d35dc | 8037 | loop |
8038 | Nb_Prim := Nb_Prim + 1; | |
8039 | pragma Assert (Nb_Prim <= Count_Prim); | |
8040 | exit when not Fixed_Prim (Nb_Prim); | |
8041 | end loop; | |
aad6babd | 8042 | |
ad274a73 | 8043 | Set_DT_Position_Value (Prim, UI_From_Int (Nb_Prim)); |
343d35dc | 8044 | Set_Fixed_Prim (Nb_Prim); |
8045 | end if; | |
aad6babd | 8046 | |
343d35dc | 8047 | Next_Elmt (Prim_Elmt); |
8048 | end loop; | |
8049 | end; | |
aad6babd | 8050 | |
343d35dc | 8051 | -- Fourth stage: Complete the decoration of primitives covering |
02a2406d | 8052 | -- interfaces (that is, propagate the DT_Position attribute from |
8053 | -- the aliased primitive) | |
aad6babd | 8054 | |
343d35dc | 8055 | Prim_Elmt := First_Prim; |
8056 | while Present (Prim_Elmt) loop | |
8057 | Prim := Node (Prim_Elmt); | |
aad6babd | 8058 | |
343d35dc | 8059 | if DT_Position (Prim) = No_Uint |
a652dd51 | 8060 | and then Present (Interface_Alias (Prim)) |
343d35dc | 8061 | then |
8062 | pragma Assert (Present (Alias (Prim)) | |
8063 | and then Find_Dispatching_Type (Alias (Prim)) = Typ); | |
aad6babd | 8064 | |
343d35dc | 8065 | -- Check if this entry will be placed in the primary DT |
aad6babd | 8066 | |
a652dd51 | 8067 | if Is_Ancestor |
cb4af01d | 8068 | (Find_Dispatching_Type (Interface_Alias (Prim)), Typ, |
8069 | Use_Full_View => True) | |
ee6ba406 | 8070 | then |
343d35dc | 8071 | pragma Assert (DT_Position (Alias (Prim)) /= No_Uint); |
ad274a73 | 8072 | Set_DT_Position_Value (Prim, DT_Position (Alias (Prim))); |
aad6babd | 8073 | |
343d35dc | 8074 | -- Otherwise it will be placed in the secondary DT |
aad6babd | 8075 | |
343d35dc | 8076 | else |
8077 | pragma Assert | |
a652dd51 | 8078 | (DT_Position (Interface_Alias (Prim)) /= No_Uint); |
ad274a73 | 8079 | Set_DT_Position_Value (Prim, |
a652dd51 | 8080 | DT_Position (Interface_Alias (Prim))); |
aad6babd | 8081 | end if; |
343d35dc | 8082 | end if; |
aad6babd | 8083 | |
343d35dc | 8084 | Next_Elmt (Prim_Elmt); |
8085 | end loop; | |
d62940bf | 8086 | |
02a2406d | 8087 | -- Generate listing showing the contents of the dispatch tables. This |
8088 | -- action is done before some further static checks because in case of | |
8089 | -- critical errors caused by a wrong dispatch table we need to see the | |
8090 | -- contents of such table. | |
d62940bf | 8091 | |
343d35dc | 8092 | if Debug_Flag_ZZ then |
8093 | Write_DT (Typ); | |
8094 | end if; | |
aad6babd | 8095 | |
343d35dc | 8096 | -- Final stage: Ensure that the table is correct plus some further |
8097 | -- verifications concerning the primitives. | |
aad6babd | 8098 | |
343d35dc | 8099 | Prim_Elmt := First_Prim; |
8100 | DT_Length := 0; | |
8101 | while Present (Prim_Elmt) loop | |
8102 | Prim := Node (Prim_Elmt); | |
aad6babd | 8103 | |
02a2406d | 8104 | -- At this point all the primitives MUST have a position in the |
8105 | -- dispatch table. | |
aad6babd | 8106 | |
343d35dc | 8107 | if DT_Position (Prim) = No_Uint then |
8108 | raise Program_Error; | |
8109 | end if; | |
aad6babd | 8110 | |
343d35dc | 8111 | -- Calculate real size of the dispatch table |
aad6babd | 8112 | |
cf365b48 | 8113 | if not In_Predef_Prims_DT (Prim) |
343d35dc | 8114 | and then UI_To_Int (DT_Position (Prim)) > DT_Length |
8115 | then | |
8116 | DT_Length := UI_To_Int (DT_Position (Prim)); | |
8117 | end if; | |
aad6babd | 8118 | |
02a2406d | 8119 | -- Ensure that the assigned position to non-predefined dispatching |
8120 | -- operations in the dispatch table is correct. | |
aad6babd | 8121 | |
cf365b48 | 8122 | if not Is_Predefined_Dispatching_Operation (Prim) |
8123 | and then not Is_Predefined_Dispatching_Alias (Prim) | |
343d35dc | 8124 | then |
8125 | Validate_Position (Prim); | |
8126 | end if; | |
ee6ba406 | 8127 | |
343d35dc | 8128 | if Chars (Prim) = Name_Finalize then |
8129 | Finalized := True; | |
8130 | end if; | |
ee6ba406 | 8131 | |
343d35dc | 8132 | if Chars (Prim) = Name_Adjust then |
8133 | Adjusted := True; | |
8134 | end if; | |
af647dc7 | 8135 | |
503f7fd3 | 8136 | -- An abstract operation cannot be declared in the private part for a |
8137 | -- visible abstract type, because it can't be overridden outside this | |
8138 | -- package hierarchy. For explicit declarations this is checked at | |
8139 | -- the point of declaration, but for inherited operations it must be | |
8140 | -- done when building the dispatch table. | |
343d35dc | 8141 | |
a652dd51 | 8142 | -- Ada 2005 (AI-251): Primitives associated with interfaces are |
8143 | -- excluded from this check because interfaces must be visible in | |
8144 | -- the public and private part (RM 7.3 (7.3/2)) | |
343d35dc | 8145 | |
02a2406d | 8146 | -- We disable this check in Relaxed_RM_Semantics mode, to accommodate |
8147 | -- legacy Ada code. | |
6da4d289 | 8148 | |
a9cd517c | 8149 | if not Relaxed_RM_Semantics |
6da4d289 | 8150 | and then Is_Abstract_Type (Typ) |
343d35dc | 8151 | and then Is_Abstract_Subprogram (Prim) |
8152 | and then Present (Alias (Prim)) | |
a652dd51 | 8153 | and then not Is_Interface |
8154 | (Find_Dispatching_Type (Ultimate_Alias (Prim))) | |
8155 | and then not Present (Interface_Alias (Prim)) | |
343d35dc | 8156 | and then Is_Derived_Type (Typ) |
8157 | and then In_Private_Part (Current_Scope) | |
8158 | and then | |
8159 | List_Containing (Parent (Prim)) = | |
e8b4793a | 8160 | Private_Declarations (Package_Specification (Current_Scope)) |
343d35dc | 8161 | and then Original_View_In_Visible_Part (Typ) |
8162 | then | |
8163 | -- We exclude Input and Output stream operations because | |
02a2406d | 8164 | -- Limited_Controlled inherits useless Input and Output stream |
8165 | -- operations from Root_Controlled, which can never be overridden. | |
ee6ba406 | 8166 | |
343d35dc | 8167 | if not Is_TSS (Prim, TSS_Stream_Input) |
8168 | and then | |
8169 | not Is_TSS (Prim, TSS_Stream_Output) | |
ee6ba406 | 8170 | then |
503f7fd3 | 8171 | Error_Msg_NE |
343d35dc | 8172 | ("abstract inherited private operation&" & |
17e14451 | 8173 | " must be overridden (RM 3.9.3(10))", |
343d35dc | 8174 | Parent (Typ), Prim); |
ee6ba406 | 8175 | end if; |
343d35dc | 8176 | end if; |
aad6babd | 8177 | |
343d35dc | 8178 | Next_Elmt (Prim_Elmt); |
8179 | end loop; | |
ee6ba406 | 8180 | |
343d35dc | 8181 | -- Additional check |
aad6babd | 8182 | |
343d35dc | 8183 | if Is_Controlled (Typ) then |
8184 | if not Finalized then | |
503f7fd3 | 8185 | Error_Msg_N |
cb97ae5c | 8186 | ("controlled type has no explicit Finalize method??", Typ); |
ee6ba406 | 8187 | |
343d35dc | 8188 | elsif not Adjusted then |
503f7fd3 | 8189 | Error_Msg_N |
cb97ae5c | 8190 | ("controlled type has no explicit Adjust method??", Typ); |
ee6ba406 | 8191 | end if; |
343d35dc | 8192 | end if; |
ee6ba406 | 8193 | |
343d35dc | 8194 | -- Set the final size of the Dispatch Table |
aad6babd | 8195 | |
343d35dc | 8196 | Set_DT_Entry_Count (The_Tag, UI_From_Int (DT_Length)); |
ee6ba406 | 8197 | |
725a69d2 | 8198 | -- The derived type must have at least as many components as its parent |
acf97c11 | 8199 | -- (for root types Etype points to itself and the test cannot fail). |
aad6babd | 8200 | |
725a69d2 | 8201 | if DT_Entry_Count (The_Tag) < |
8202 | DT_Entry_Count (First_Tag_Component (Parent_Typ)) | |
8203 | then | |
8204 | raise Program_Error; | |
aad6babd | 8205 | end if; |
ee6ba406 | 8206 | end Set_All_DT_Position; |
8207 | ||
294b942d | 8208 | -------------------------- |
8209 | -- Set_CPP_Constructors -- | |
8210 | -------------------------- | |
ee6ba406 | 8211 | |
294b942d | 8212 | procedure Set_CPP_Constructors (Typ : Entity_Id) is |
d00681a7 | 8213 | |
95773554 | 8214 | function Gen_Parameters_Profile (E : Entity_Id) return List_Id; |
8215 | -- Duplicate the parameters profile of the imported C++ constructor | |
cefcaf9d | 8216 | -- adding the "this" pointer to the object as the additional first |
8217 | -- parameter under the usual form _Init : in out Typ. | |
d00681a7 | 8218 | |
02a2406d | 8219 | ---------------------------- |
8220 | -- Gen_Parameters_Profile -- | |
8221 | ---------------------------- | |
8222 | ||
95773554 | 8223 | function Gen_Parameters_Profile (E : Entity_Id) return List_Id is |
8224 | Loc : constant Source_Ptr := Sloc (E); | |
8225 | Parms : List_Id; | |
8226 | P : Node_Id; | |
b8a17a21 | 8227 | |
d00681a7 | 8228 | begin |
95773554 | 8229 | Parms := |
8230 | New_List ( | |
8231 | Make_Parameter_Specification (Loc, | |
8232 | Defining_Identifier => | |
8233 | Make_Defining_Identifier (Loc, Name_uInit), | |
cefcaf9d | 8234 | In_Present => True, |
8235 | Out_Present => True, | |
83c6c069 | 8236 | Parameter_Type => New_Occurrence_Of (Typ, Loc))); |
95773554 | 8237 | |
8238 | if Present (Parameter_Specifications (Parent (E))) then | |
8239 | P := First (Parameter_Specifications (Parent (E))); | |
8240 | while Present (P) loop | |
8241 | Append_To (Parms, | |
8242 | Make_Parameter_Specification (Loc, | |
8243 | Defining_Identifier => | |
8244 | Make_Defining_Identifier (Loc, | |
8245 | Chars => Chars (Defining_Identifier (P))), | |
8246 | Parameter_Type => New_Copy_Tree (Parameter_Type (P)), | |
8247 | Expression => New_Copy_Tree (Expression (P)))); | |
8248 | Next (P); | |
8249 | end loop; | |
d00681a7 | 8250 | end if; |
b8a17a21 | 8251 | |
95773554 | 8252 | return Parms; |
8253 | end Gen_Parameters_Profile; | |
d00681a7 | 8254 | |
8255 | -- Local variables | |
8256 | ||
95773554 | 8257 | Loc : Source_Ptr; |
8258 | E : Entity_Id; | |
8259 | Found : Boolean := False; | |
8260 | IP : Entity_Id; | |
8261 | IP_Body : Node_Id; | |
8262 | P : Node_Id; | |
8263 | Parms : List_Id; | |
d00681a7 | 8264 | |
c1b63034 | 8265 | Covers_Default_Constructor : Entity_Id := Empty; |
8266 | ||
8267 | -- Start of processing for Set_CPP_Constructor | |
8268 | ||
ee6ba406 | 8269 | begin |
d00681a7 | 8270 | pragma Assert (Is_CPP_Class (Typ)); |
8271 | ||
294b942d | 8272 | -- Look for the constructor entities |
ee6ba406 | 8273 | |
8274 | E := Next_Entity (Typ); | |
294b942d | 8275 | while Present (E) loop |
8276 | if Ekind (E) = E_Function | |
8277 | and then Is_Constructor (E) | |
8278 | then | |
294b942d | 8279 | Found := True; |
8280 | Loc := Sloc (E); | |
95773554 | 8281 | Parms := Gen_Parameters_Profile (E); |
cefcaf9d | 8282 | IP := Make_Defining_Identifier (Loc, Make_Init_Proc_Name (Typ)); |
95773554 | 8283 | |
d1a2e31b | 8284 | -- Case 1: Constructor of untagged type |
95773554 | 8285 | |
8286 | -- If the C++ class has no virtual methods then the matching Ada | |
d1a2e31b | 8287 | -- type is an untagged record type. In such case there is no need |
95773554 | 8288 | -- to generate a wrapper of the C++ constructor because the _tag |
8289 | -- component is not available. | |
8290 | ||
8291 | if not Is_Tagged_Type (Typ) then | |
8292 | Discard_Node | |
8293 | (Make_Subprogram_Declaration (Loc, | |
8294 | Specification => | |
8295 | Make_Procedure_Specification (Loc, | |
8296 | Defining_Unit_Name => IP, | |
8297 | Parameter_Specifications => Parms))); | |
8298 | ||
8299 | Set_Init_Proc (Typ, IP); | |
8300 | Set_Is_Imported (IP); | |
8301 | Set_Is_Constructor (IP); | |
8302 | Set_Interface_Name (IP, Interface_Name (E)); | |
8303 | Set_Convention (IP, Convention_CPP); | |
8304 | Set_Is_Public (IP); | |
8305 | Set_Has_Completion (IP); | |
8306 | ||
8307 | -- Case 2: Constructor of a tagged type | |
8308 | ||
cefcaf9d | 8309 | -- In this case we generate the IP routine as a wrapper of the |
8310 | -- C++ constructor because IP must also save a copy of the _tag | |
95773554 | 8311 | -- generated in the C++ side. The copy of the _tag is used by |
8312 | -- Build_CPP_Init_Procedure to elaborate derivations of C++ types. | |
d00681a7 | 8313 | |
95773554 | 8314 | -- Generate: |
cefcaf9d | 8315 | -- procedure IP (_init : in out Typ; ...) is |
8316 | -- procedure ConstructorP (_init : in out Typ; ...); | |
95773554 | 8317 | -- pragma Import (ConstructorP); |
8318 | -- begin | |
8319 | -- ConstructorP (_init, ...); | |
8320 | -- if Typ._tag = null then | |
8321 | -- Typ._tag := _init._tag; | |
8322 | -- end if; | |
8323 | -- end IP; | |
d00681a7 | 8324 | |
95773554 | 8325 | else |
8326 | declare | |
8327 | Body_Stmts : constant List_Id := New_List; | |
8328 | Constructor_Id : Entity_Id; | |
8329 | Constructor_Decl_Node : Node_Id; | |
8330 | Init_Tags_List : List_Id; | |
d00681a7 | 8331 | |
95773554 | 8332 | begin |
8333 | Constructor_Id := Make_Temporary (Loc, 'P'); | |
d00681a7 | 8334 | |
95773554 | 8335 | Constructor_Decl_Node := |
8336 | Make_Subprogram_Declaration (Loc, | |
8337 | Make_Procedure_Specification (Loc, | |
8338 | Defining_Unit_Name => Constructor_Id, | |
8339 | Parameter_Specifications => Parms)); | |
d00681a7 | 8340 | |
95773554 | 8341 | Set_Is_Imported (Constructor_Id); |
8342 | Set_Is_Constructor (Constructor_Id); | |
8343 | Set_Interface_Name (Constructor_Id, Interface_Name (E)); | |
8344 | Set_Convention (Constructor_Id, Convention_CPP); | |
8345 | Set_Is_Public (Constructor_Id); | |
8346 | Set_Has_Completion (Constructor_Id); | |
d00681a7 | 8347 | |
95773554 | 8348 | -- Build the init procedure as a wrapper of this constructor |
d00681a7 | 8349 | |
95773554 | 8350 | Parms := Gen_Parameters_Profile (E); |
d00681a7 | 8351 | |
95773554 | 8352 | -- Invoke the C++ constructor |
d00681a7 | 8353 | |
95773554 | 8354 | declare |
8355 | Actuals : constant List_Id := New_List; | |
d00681a7 | 8356 | |
95773554 | 8357 | begin |
8358 | P := First (Parms); | |
8359 | while Present (P) loop | |
8360 | Append_To (Actuals, | |
83c6c069 | 8361 | New_Occurrence_Of (Defining_Identifier (P), Loc)); |
95773554 | 8362 | Next (P); |
8363 | end loop; | |
d00681a7 | 8364 | |
95773554 | 8365 | Append_To (Body_Stmts, |
8366 | Make_Procedure_Call_Statement (Loc, | |
83c6c069 | 8367 | Name => New_Occurrence_Of (Constructor_Id, Loc), |
95773554 | 8368 | Parameter_Associations => Actuals)); |
8369 | end; | |
d00681a7 | 8370 | |
95773554 | 8371 | -- Initialize copies of C++ primary and secondary tags |
d00681a7 | 8372 | |
95773554 | 8373 | Init_Tags_List := New_List; |
d00681a7 | 8374 | |
95773554 | 8375 | declare |
8376 | Tag_Elmt : Elmt_Id; | |
8377 | Tag_Comp : Node_Id; | |
d00681a7 | 8378 | |
95773554 | 8379 | begin |
8380 | Tag_Elmt := First_Elmt (Access_Disp_Table (Typ)); | |
8381 | Tag_Comp := First_Tag_Component (Typ); | |
d00681a7 | 8382 | |
95773554 | 8383 | while Present (Tag_Elmt) |
8384 | and then Is_Tag (Node (Tag_Elmt)) | |
8385 | loop | |
8386 | -- Skip the following assertion with primary tags | |
8387 | -- because Related_Type is not set on primary tag | |
cefcaf9d | 8388 | -- components. |
95773554 | 8389 | |
8390 | pragma Assert | |
8391 | (Tag_Comp = First_Tag_Component (Typ) | |
8392 | or else Related_Type (Node (Tag_Elmt)) | |
8393 | = Related_Type (Tag_Comp)); | |
8394 | ||
8395 | Append_To (Init_Tags_List, | |
8396 | Make_Assignment_Statement (Loc, | |
8397 | Name => | |
83c6c069 | 8398 | New_Occurrence_Of (Node (Tag_Elmt), Loc), |
95773554 | 8399 | Expression => |
8400 | Make_Selected_Component (Loc, | |
8401 | Prefix => | |
8402 | Make_Identifier (Loc, Name_uInit), | |
8403 | Selector_Name => | |
83c6c069 | 8404 | New_Occurrence_Of (Tag_Comp, Loc)))); |
d00681a7 | 8405 | |
95773554 | 8406 | Tag_Comp := Next_Tag_Component (Tag_Comp); |
8407 | Next_Elmt (Tag_Elmt); | |
8408 | end loop; | |
8409 | end; | |
d00681a7 | 8410 | |
95773554 | 8411 | Append_To (Body_Stmts, |
8412 | Make_If_Statement (Loc, | |
8413 | Condition => | |
8414 | Make_Op_Eq (Loc, | |
8415 | Left_Opnd => | |
83c6c069 | 8416 | New_Occurrence_Of |
95773554 | 8417 | (Node (First_Elmt (Access_Disp_Table (Typ))), |
8418 | Loc), | |
8419 | Right_Opnd => | |
8420 | Unchecked_Convert_To (RTE (RE_Tag), | |
83c6c069 | 8421 | New_Occurrence_Of (RTE (RE_Null_Address), Loc))), |
95773554 | 8422 | Then_Statements => Init_Tags_List)); |
8423 | ||
8424 | IP_Body := | |
8425 | Make_Subprogram_Body (Loc, | |
8426 | Specification => | |
8427 | Make_Procedure_Specification (Loc, | |
8428 | Defining_Unit_Name => IP, | |
8429 | Parameter_Specifications => Parms), | |
8430 | Declarations => New_List (Constructor_Decl_Node), | |
8431 | Handled_Statement_Sequence => | |
8432 | Make_Handled_Sequence_Of_Statements (Loc, | |
8433 | Statements => Body_Stmts, | |
8434 | Exception_Handlers => No_List)); | |
8435 | ||
8436 | Discard_Node (IP_Body); | |
8437 | Set_Init_Proc (Typ, IP); | |
8438 | end; | |
8439 | end if; | |
c1b63034 | 8440 | |
02a2406d | 8441 | -- If this constructor has parameters and all its parameters have |
8442 | -- defaults then it covers the default constructor. The semantic | |
8443 | -- analyzer ensures that only one constructor with defaults covers | |
8444 | -- the default constructor. | |
c1b63034 | 8445 | |
8446 | if Present (Parameter_Specifications (Parent (E))) | |
8447 | and then Needs_No_Actuals (E) | |
8448 | then | |
95773554 | 8449 | Covers_Default_Constructor := IP; |
c1b63034 | 8450 | end if; |
294b942d | 8451 | end if; |
8452 | ||
ee6ba406 | 8453 | Next_Entity (E); |
8454 | end loop; | |
8455 | ||
9dfe12ae | 8456 | -- If there are no constructors, mark the type as abstract since we |
ee6ba406 | 8457 | -- won't be able to declare objects of that type. |
8458 | ||
294b942d | 8459 | if not Found then |
343d35dc | 8460 | Set_Is_Abstract_Type (Typ); |
ee6ba406 | 8461 | end if; |
d00681a7 | 8462 | |
c1b63034 | 8463 | -- Handle constructor that has all its parameters with defaults and |
8464 | -- hence it covers the default constructor. We generate a wrapper IP | |
8465 | -- which calls the covering constructor. | |
8466 | ||
8467 | if Present (Covers_Default_Constructor) then | |
95773554 | 8468 | declare |
8469 | Body_Stmts : List_Id; | |
c1b63034 | 8470 | |
95773554 | 8471 | begin |
8472 | Loc := Sloc (Covers_Default_Constructor); | |
c1b63034 | 8473 | |
95773554 | 8474 | Body_Stmts := New_List ( |
8475 | Make_Procedure_Call_Statement (Loc, | |
8476 | Name => | |
83c6c069 | 8477 | New_Occurrence_Of (Covers_Default_Constructor, Loc), |
95773554 | 8478 | Parameter_Associations => New_List ( |
8479 | Make_Identifier (Loc, Name_uInit)))); | |
c1b63034 | 8480 | |
95773554 | 8481 | IP := Make_Defining_Identifier (Loc, Make_Init_Proc_Name (Typ)); |
c1b63034 | 8482 | |
95773554 | 8483 | IP_Body := |
8484 | Make_Subprogram_Body (Loc, | |
8485 | Specification => | |
8486 | Make_Procedure_Specification (Loc, | |
8487 | Defining_Unit_Name => IP, | |
8488 | Parameter_Specifications => New_List ( | |
8489 | Make_Parameter_Specification (Loc, | |
8490 | Defining_Identifier => | |
8491 | Make_Defining_Identifier (Loc, Name_uInit), | |
83c6c069 | 8492 | Parameter_Type => New_Occurrence_Of (Typ, Loc)))), |
c1b63034 | 8493 | |
95773554 | 8494 | Declarations => No_List, |
8495 | ||
8496 | Handled_Statement_Sequence => | |
8497 | Make_Handled_Sequence_Of_Statements (Loc, | |
8498 | Statements => Body_Stmts, | |
8499 | Exception_Handlers => No_List)); | |
8500 | ||
8501 | Discard_Node (IP_Body); | |
8502 | Set_Init_Proc (Typ, IP); | |
8503 | end; | |
c1b63034 | 8504 | end if; |
8505 | ||
d00681a7 | 8506 | -- If the CPP type has constructors then it must import also the default |
8507 | -- C++ constructor. It is required for default initialization of objects | |
8508 | -- of the type. It is also required to elaborate objects of Ada types | |
8509 | -- that are defined as derivations of this CPP type. | |
8510 | ||
8511 | if Has_CPP_Constructors (Typ) | |
8512 | and then No (Init_Proc (Typ)) | |
8513 | then | |
cb97ae5c | 8514 | Error_Msg_N ("??default constructor must be imported from C++", Typ); |
d00681a7 | 8515 | end if; |
294b942d | 8516 | end Set_CPP_Constructors; |
ee6ba406 | 8517 | |
ad274a73 | 8518 | --------------------------- |
8519 | -- Set_DT_Position_Value -- | |
8520 | --------------------------- | |
8521 | ||
8522 | procedure Set_DT_Position_Value (Prim : Entity_Id; Value : Uint) is | |
8523 | begin | |
8524 | Set_DT_Position (Prim, Value); | |
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_DT_Position (Wrapped_Entity (Prim), Value); | |
8534 | end if; | |
8535 | end Set_DT_Position_Value; | |
8536 | ||
725a69d2 | 8537 | -------------------------- |
8538 | -- Set_DTC_Entity_Value -- | |
8539 | -------------------------- | |
8540 | ||
8541 | procedure Set_DTC_Entity_Value | |
8542 | (Tagged_Type : Entity_Id; | |
8543 | Prim : Entity_Id) | |
8544 | is | |
8545 | begin | |
a652dd51 | 8546 | if Present (Interface_Alias (Prim)) |
725a69d2 | 8547 | and then Is_Interface |
a652dd51 | 8548 | (Find_Dispatching_Type (Interface_Alias (Prim))) |
725a69d2 | 8549 | then |
8550 | Set_DTC_Entity (Prim, | |
8551 | Find_Interface_Tag | |
8552 | (T => Tagged_Type, | |
a652dd51 | 8553 | Iface => Find_Dispatching_Type (Interface_Alias (Prim)))); |
725a69d2 | 8554 | else |
8555 | Set_DTC_Entity (Prim, | |
8556 | First_Tag_Component (Tagged_Type)); | |
8557 | end if; | |
ad274a73 | 8558 | |
8559 | -- Propagate the value to the wrapped subprogram (if one is present) | |
8560 | ||
8561 | if Ekind_In (Prim, E_Function, E_Procedure) | |
8562 | and then Is_Primitive_Wrapper (Prim) | |
8563 | and then Present (Wrapped_Entity (Prim)) | |
8564 | and then Is_Dispatching_Operation (Wrapped_Entity (Prim)) | |
8565 | then | |
8566 | Set_DTC_Entity (Wrapped_Entity (Prim), DTC_Entity (Prim)); | |
8567 | end if; | |
725a69d2 | 8568 | end Set_DTC_Entity_Value; |
8569 | ||
952af0b9 | 8570 | ----------------- |
8571 | -- Tagged_Kind -- | |
8572 | ----------------- | |
8573 | ||
8574 | function Tagged_Kind (T : Entity_Id) return Node_Id is | |
8575 | Conc_Typ : Entity_Id; | |
8576 | Loc : constant Source_Ptr := Sloc (T); | |
8577 | ||
8578 | begin | |
68f95949 | 8579 | pragma Assert |
8580 | (Is_Tagged_Type (T) and then RTE_Available (RE_Tagged_Kind)); | |
952af0b9 | 8581 | |
8582 | -- Abstract kinds | |
8583 | ||
343d35dc | 8584 | if Is_Abstract_Type (T) then |
952af0b9 | 8585 | if Is_Limited_Record (T) then |
83c6c069 | 8586 | return New_Occurrence_Of |
8587 | (RTE (RE_TK_Abstract_Limited_Tagged), Loc); | |
952af0b9 | 8588 | else |
83c6c069 | 8589 | return New_Occurrence_Of |
8590 | (RTE (RE_TK_Abstract_Tagged), Loc); | |
952af0b9 | 8591 | end if; |
8592 | ||
8593 | -- Concurrent kinds | |
8594 | ||
8595 | elsif Is_Concurrent_Record_Type (T) then | |
8596 | Conc_Typ := Corresponding_Concurrent_Type (T); | |
8597 | ||
17e14451 | 8598 | if Present (Full_View (Conc_Typ)) then |
8599 | Conc_Typ := Full_View (Conc_Typ); | |
8600 | end if; | |
8601 | ||
952af0b9 | 8602 | if Ekind (Conc_Typ) = E_Protected_Type then |
83c6c069 | 8603 | return New_Occurrence_Of (RTE (RE_TK_Protected), Loc); |
952af0b9 | 8604 | else |
8605 | pragma Assert (Ekind (Conc_Typ) = E_Task_Type); | |
83c6c069 | 8606 | return New_Occurrence_Of (RTE (RE_TK_Task), Loc); |
952af0b9 | 8607 | end if; |
8608 | ||
8609 | -- Regular tagged kinds | |
8610 | ||
8611 | else | |
8612 | if Is_Limited_Record (T) then | |
83c6c069 | 8613 | return New_Occurrence_Of (RTE (RE_TK_Limited_Tagged), Loc); |
952af0b9 | 8614 | else |
83c6c069 | 8615 | return New_Occurrence_Of (RTE (RE_TK_Tagged), Loc); |
952af0b9 | 8616 | end if; |
8617 | end if; | |
8618 | end Tagged_Kind; | |
8619 | ||
aad6babd | 8620 | -------------- |
8621 | -- Write_DT -- | |
8622 | -------------- | |
8623 | ||
8624 | procedure Write_DT (Typ : Entity_Id) is | |
8625 | Elmt : Elmt_Id; | |
8626 | Prim : Node_Id; | |
8627 | ||
8628 | begin | |
8629 | -- Protect this procedure against wrong usage. Required because it will | |
8630 | -- be used directly from GDB | |
8631 | ||
17e14451 | 8632 | if not (Typ <= Last_Node_Id) |
aad6babd | 8633 | or else not Is_Tagged_Type (Typ) |
8634 | then | |
d62940bf | 8635 | Write_Str ("wrong usage: Write_DT must be used with tagged types"); |
aad6babd | 8636 | Write_Eol; |
8637 | return; | |
8638 | end if; | |
8639 | ||
8640 | Write_Int (Int (Typ)); | |
8641 | Write_Str (": "); | |
8642 | Write_Name (Chars (Typ)); | |
8643 | ||
8644 | if Is_Interface (Typ) then | |
8645 | Write_Str (" is interface"); | |
8646 | end if; | |
8647 | ||
8648 | Write_Eol; | |
8649 | ||
8650 | Elmt := First_Elmt (Primitive_Operations (Typ)); | |
8651 | while Present (Elmt) loop | |
8652 | Prim := Node (Elmt); | |
8653 | Write_Str (" - "); | |
8654 | ||
8655 | -- Indicate if this primitive will be allocated in the primary | |
8656 | -- dispatch table or in a secondary dispatch table associated | |
8657 | -- with an abstract interface type | |
8658 | ||
8659 | if Present (DTC_Entity (Prim)) then | |
8660 | if Etype (DTC_Entity (Prim)) = RTE (RE_Tag) then | |
8661 | Write_Str ("[P] "); | |
8662 | else | |
8663 | Write_Str ("[s] "); | |
8664 | end if; | |
8665 | end if; | |
8666 | ||
8667 | -- Output the node of this primitive operation and its name | |
8668 | ||
8669 | Write_Int (Int (Prim)); | |
8670 | Write_Str (": "); | |
68f95949 | 8671 | |
8672 | if Is_Predefined_Dispatching_Operation (Prim) then | |
8673 | Write_Str ("(predefined) "); | |
8674 | end if; | |
8675 | ||
b381b314 | 8676 | -- Prefix the name of the primitive with its corresponding tagged |
8677 | -- type to facilitate seeing inherited primitives. | |
8678 | ||
8679 | if Present (Alias (Prim)) then | |
8680 | Write_Name | |
8681 | (Chars (Find_Dispatching_Type (Ultimate_Alias (Prim)))); | |
8682 | else | |
8683 | Write_Name (Chars (Typ)); | |
8684 | end if; | |
8685 | ||
8686 | Write_Str ("."); | |
aad6babd | 8687 | Write_Name (Chars (Prim)); |
8688 | ||
8689 | -- Indicate if this primitive has an aliased primitive | |
8690 | ||
8691 | if Present (Alias (Prim)) then | |
8692 | Write_Str (" (alias = "); | |
8693 | Write_Int (Int (Alias (Prim))); | |
8694 | ||
8695 | -- If the DTC_Entity attribute is already set we can also output | |
4c58ddd7 | 8696 | -- the name of the interface covered by this primitive (if any). |
aad6babd | 8697 | |
f117057b | 8698 | if Ekind_In (Alias (Prim), E_Function, E_Procedure) |
8699 | and then Present (DTC_Entity (Alias (Prim))) | |
aad6babd | 8700 | and then Is_Interface (Scope (DTC_Entity (Alias (Prim)))) |
8701 | then | |
8702 | Write_Str (" from interface "); | |
8703 | Write_Name (Chars (Scope (DTC_Entity (Alias (Prim))))); | |
8704 | end if; | |
8705 | ||
a652dd51 | 8706 | if Present (Interface_Alias (Prim)) then |
aad6babd | 8707 | Write_Str (", AI_Alias of "); |
f235fede | 8708 | |
8709 | if Is_Null_Interface_Primitive (Interface_Alias (Prim)) then | |
8710 | Write_Str ("null primitive "); | |
8711 | end if; | |
8712 | ||
a652dd51 | 8713 | Write_Name |
8714 | (Chars (Find_Dispatching_Type (Interface_Alias (Prim)))); | |
aad6babd | 8715 | Write_Char (':'); |
a652dd51 | 8716 | Write_Int (Int (Interface_Alias (Prim))); |
aad6babd | 8717 | end if; |
8718 | ||
8719 | Write_Str (")"); | |
8720 | end if; | |
8721 | ||
8722 | -- Display the final position of this primitive in its associated | |
02a2406d | 8723 | -- (primary or secondary) dispatch table. |
aad6babd | 8724 | |
8725 | if Present (DTC_Entity (Prim)) | |
8726 | and then DT_Position (Prim) /= No_Uint | |
8727 | then | |
8728 | Write_Str (" at #"); | |
8729 | Write_Int (UI_To_Int (DT_Position (Prim))); | |
8730 | end if; | |
8731 | ||
343d35dc | 8732 | if Is_Abstract_Subprogram (Prim) then |
aad6babd | 8733 | Write_Str (" is abstract;"); |
af647dc7 | 8734 | |
8735 | -- Check if this is a null primitive | |
8736 | ||
8737 | elsif Comes_From_Source (Prim) | |
8738 | and then Ekind (Prim) = E_Procedure | |
8739 | and then Null_Present (Parent (Prim)) | |
8740 | then | |
8741 | Write_Str (" is null;"); | |
aad6babd | 8742 | end if; |
8743 | ||
555c63a6 | 8744 | if Is_Eliminated (Ultimate_Alias (Prim)) then |
8745 | Write_Str (" (eliminated)"); | |
8746 | end if; | |
8747 | ||
d00681a7 | 8748 | if Is_Imported (Prim) |
8749 | and then Convention (Prim) = Convention_CPP | |
8750 | then | |
8751 | Write_Str (" (C++)"); | |
8752 | end if; | |
8753 | ||
aad6babd | 8754 | Write_Eol; |
8755 | ||
8756 | Next_Elmt (Elmt); | |
8757 | end loop; | |
8758 | end Write_DT; | |
8759 | ||
ee6ba406 | 8760 | end Exp_Disp; |