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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 | -- -- | |
232a63ed | 9 | -- Copyright (C) 1992-2010, 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; | |
343d35dc | 32 | with Exp_Atag; use Exp_Atag; |
8a8d9086 | 33 | with Exp_Ch6; use Exp_Ch6; |
ee6ba406 | 34 | with Exp_Ch7; use Exp_Ch7; |
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; |
ee6ba406 | 40 | with Itypes; use Itypes; |
b6b96867 | 41 | with Layout; use Layout; |
ee6ba406 | 42 | with Nlists; use Nlists; |
43 | with Nmake; use Nmake; | |
aad6babd | 44 | with Namet; use Namet; |
ee6ba406 | 45 | with Opt; use Opt; |
aad6babd | 46 | with Output; use Output; |
68f95949 | 47 | with Restrict; use Restrict; |
48 | with Rident; use Rident; | |
ee6ba406 | 49 | with Rtsfind; use Rtsfind; |
aad6babd | 50 | with Sem; use Sem; |
d60c9ff7 | 51 | with Sem_Aux; use Sem_Aux; |
725a69d2 | 52 | with Sem_Ch6; use Sem_Ch6; |
acf97c11 | 53 | with Sem_Ch7; use Sem_Ch7; |
725a69d2 | 54 | with Sem_Ch8; use Sem_Ch8; |
ee6ba406 | 55 | with Sem_Disp; use Sem_Disp; |
725a69d2 | 56 | with Sem_Eval; use Sem_Eval; |
ee6ba406 | 57 | with Sem_Res; use Sem_Res; |
aad6babd | 58 | with Sem_Type; use Sem_Type; |
ee6ba406 | 59 | with Sem_Util; use Sem_Util; |
60 | with Sinfo; use Sinfo; | |
61 | with Snames; use Snames; | |
62 | with Stand; use Stand; | |
725a69d2 | 63 | with Stringt; use Stringt; |
5a44b136 | 64 | with SCIL_LL; use SCIL_LL; |
ee6ba406 | 65 | with Tbuild; use Tbuild; |
66 | with Uintp; use Uintp; | |
67 | ||
68 | package body Exp_Disp is | |
69 | ||
725a69d2 | 70 | ----------------------- |
71 | -- Local Subprograms -- | |
72 | ----------------------- | |
ee6ba406 | 73 | |
68f95949 | 74 | function Default_Prim_Op_Position (E : Entity_Id) return Uint; |
aad6babd | 75 | -- Ada 2005 (AI-251): Returns the fixed position in the dispatch table |
76 | -- of the default primitive operations. | |
77 | ||
24971415 | 78 | function Has_DT (Typ : Entity_Id) return Boolean; |
79 | pragma Inline (Has_DT); | |
80 | -- Returns true if we generate a dispatch table for tagged type Typ | |
81 | ||
af647dc7 | 82 | function Is_Predefined_Dispatching_Alias (Prim : Entity_Id) return Boolean; |
83 | -- Returns true if Prim is not a predefined dispatching primitive but it is | |
36b938a3 | 84 | -- an alias of a predefined dispatching primitive (i.e. through a renaming) |
af647dc7 | 85 | |
cd534f03 | 86 | function New_Value (From : Node_Id) return Node_Id; |
87 | -- From is the original Expression. New_Value is equivalent to a call | |
88 | -- to Duplicate_Subexpr with an explicit dereference when From is an | |
89 | -- access parameter. | |
90 | ||
ee6ba406 | 91 | function Original_View_In_Visible_Part (Typ : Entity_Id) return Boolean; |
92 | -- Check if the type has a private view or if the public view appears | |
93 | -- in the visible part of a package spec. | |
94 | ||
d62940bf | 95 | function Prim_Op_Kind |
96 | (Prim : Entity_Id; | |
97 | Typ : Entity_Id) return Node_Id; | |
98 | -- Ada 2005 (AI-345): Determine the primitive operation kind of Prim | |
952af0b9 | 99 | -- according to its type Typ. Return a reference to an RE_Prim_Op_Kind |
d62940bf | 100 | -- enumeration value. |
aad6babd | 101 | |
952af0b9 | 102 | function Tagged_Kind (T : Entity_Id) return Node_Id; |
103 | -- Ada 2005 (AI-345): Determine the tagged kind of T and return a reference | |
104 | -- to an RE_Tagged_Kind enumeration value. | |
105 | ||
cd534f03 | 106 | ---------------------- |
107 | -- Apply_Tag_Checks -- | |
108 | ---------------------- | |
109 | ||
110 | procedure Apply_Tag_Checks (Call_Node : Node_Id) is | |
111 | Loc : constant Source_Ptr := Sloc (Call_Node); | |
112 | Ctrl_Arg : constant Node_Id := Controlling_Argument (Call_Node); | |
113 | Ctrl_Typ : constant Entity_Id := Base_Type (Etype (Ctrl_Arg)); | |
114 | Param_List : constant List_Id := Parameter_Associations (Call_Node); | |
115 | ||
116 | Subp : Entity_Id; | |
117 | CW_Typ : Entity_Id; | |
118 | Param : Node_Id; | |
119 | Typ : Entity_Id; | |
120 | Eq_Prim_Op : Entity_Id := Empty; | |
121 | ||
122 | begin | |
123 | if No_Run_Time_Mode then | |
124 | Error_Msg_CRT ("tagged types", Call_Node); | |
125 | return; | |
126 | end if; | |
127 | ||
128 | -- Apply_Tag_Checks is called directly from the semantics, so we need | |
129 | -- a check to see whether expansion is active before proceeding. In | |
130 | -- addition, there is no need to expand the call when compiling under | |
131 | -- restriction No_Dispatching_Calls; the semantic analyzer has | |
132 | -- previously notified the violation of this restriction. | |
133 | ||
134 | if not Expander_Active | |
135 | or else Restriction_Active (No_Dispatching_Calls) | |
136 | then | |
137 | return; | |
138 | end if; | |
139 | ||
140 | -- Set subprogram. If this is an inherited operation that was | |
141 | -- overridden, the body that is being called is its alias. | |
142 | ||
143 | Subp := Entity (Name (Call_Node)); | |
144 | ||
145 | if Present (Alias (Subp)) | |
146 | and then Is_Inherited_Operation (Subp) | |
147 | and then No (DTC_Entity (Subp)) | |
148 | then | |
149 | Subp := Alias (Subp); | |
150 | end if; | |
151 | ||
152 | -- Definition of the class-wide type and the tagged type | |
153 | ||
154 | -- If the controlling argument is itself a tag rather than a tagged | |
155 | -- object, then use the class-wide type associated with the subprogram's | |
156 | -- controlling type. This case can occur when a call to an inherited | |
157 | -- primitive has an actual that originated from a default parameter | |
158 | -- given by a tag-indeterminate call and when there is no other | |
159 | -- controlling argument providing the tag (AI-239 requires dispatching). | |
160 | -- This capability of dispatching directly by tag is also needed by the | |
161 | -- implementation of AI-260 (for the generic dispatching constructors). | |
162 | ||
163 | if Ctrl_Typ = RTE (RE_Tag) | |
164 | or else (RTE_Available (RE_Interface_Tag) | |
165 | and then Ctrl_Typ = RTE (RE_Interface_Tag)) | |
166 | then | |
167 | CW_Typ := Class_Wide_Type (Find_Dispatching_Type (Subp)); | |
168 | ||
169 | -- Class_Wide_Type is applied to the expressions used to initialize | |
170 | -- CW_Typ, to ensure that CW_Typ always denotes a class-wide type, since | |
171 | -- there are cases where the controlling type is resolved to a specific | |
172 | -- type (such as for designated types of arguments such as CW'Access). | |
173 | ||
174 | elsif Is_Access_Type (Ctrl_Typ) then | |
175 | CW_Typ := Class_Wide_Type (Designated_Type (Ctrl_Typ)); | |
176 | ||
177 | else | |
178 | CW_Typ := Class_Wide_Type (Ctrl_Typ); | |
179 | end if; | |
180 | ||
181 | Typ := Root_Type (CW_Typ); | |
182 | ||
183 | if Ekind (Typ) = E_Incomplete_Type then | |
184 | Typ := Non_Limited_View (Typ); | |
185 | end if; | |
186 | ||
187 | if not Is_Limited_Type (Typ) then | |
188 | Eq_Prim_Op := Find_Prim_Op (Typ, Name_Op_Eq); | |
189 | end if; | |
190 | ||
191 | -- Dispatching call to C++ primitive | |
192 | ||
193 | if Is_CPP_Class (Typ) then | |
194 | null; | |
195 | ||
196 | -- Dispatching call to Ada primitive | |
197 | ||
198 | elsif Present (Param_List) then | |
199 | ||
200 | -- Generate the Tag checks when appropriate | |
201 | ||
202 | Param := First_Actual (Call_Node); | |
203 | while Present (Param) loop | |
204 | ||
205 | -- No tag check with itself | |
206 | ||
207 | if Param = Ctrl_Arg then | |
208 | null; | |
209 | ||
210 | -- No tag check for parameter whose type is neither tagged nor | |
211 | -- access to tagged (for access parameters) | |
212 | ||
213 | elsif No (Find_Controlling_Arg (Param)) then | |
214 | null; | |
215 | ||
216 | -- No tag check for function dispatching on result if the | |
217 | -- Tag given by the context is this one | |
218 | ||
219 | elsif Find_Controlling_Arg (Param) = Ctrl_Arg then | |
220 | null; | |
221 | ||
222 | -- "=" is the only dispatching operation allowed to get | |
223 | -- operands with incompatible tags (it just returns false). | |
224 | -- We use Duplicate_Subexpr_Move_Checks instead of calling | |
225 | -- Relocate_Node because the value will be duplicated to | |
226 | -- check the tags. | |
227 | ||
228 | elsif Subp = Eq_Prim_Op then | |
229 | null; | |
230 | ||
231 | -- No check in presence of suppress flags | |
232 | ||
233 | elsif Tag_Checks_Suppressed (Etype (Param)) | |
234 | or else (Is_Access_Type (Etype (Param)) | |
235 | and then Tag_Checks_Suppressed | |
236 | (Designated_Type (Etype (Param)))) | |
237 | then | |
238 | null; | |
239 | ||
240 | -- Optimization: no tag checks if the parameters are identical | |
241 | ||
242 | elsif Is_Entity_Name (Param) | |
243 | and then Is_Entity_Name (Ctrl_Arg) | |
244 | and then Entity (Param) = Entity (Ctrl_Arg) | |
245 | then | |
246 | null; | |
247 | ||
248 | -- Now we need to generate the Tag check | |
249 | ||
250 | else | |
251 | -- Generate code for tag equality check | |
252 | -- Perhaps should have Checks.Apply_Tag_Equality_Check??? | |
253 | ||
254 | Insert_Action (Ctrl_Arg, | |
255 | Make_Implicit_If_Statement (Call_Node, | |
256 | Condition => | |
257 | Make_Op_Ne (Loc, | |
258 | Left_Opnd => | |
259 | Make_Selected_Component (Loc, | |
260 | Prefix => New_Value (Ctrl_Arg), | |
261 | Selector_Name => | |
262 | New_Reference_To | |
263 | (First_Tag_Component (Typ), Loc)), | |
264 | ||
265 | Right_Opnd => | |
266 | Make_Selected_Component (Loc, | |
267 | Prefix => | |
268 | Unchecked_Convert_To (Typ, New_Value (Param)), | |
269 | Selector_Name => | |
270 | New_Reference_To | |
271 | (First_Tag_Component (Typ), Loc))), | |
272 | ||
273 | Then_Statements => | |
274 | New_List (New_Constraint_Error (Loc)))); | |
275 | end if; | |
276 | ||
277 | Next_Actual (Param); | |
278 | end loop; | |
279 | end if; | |
280 | end Apply_Tag_Checks; | |
281 | ||
24971415 | 282 | ------------------------ |
283 | -- Building_Static_DT -- | |
284 | ------------------------ | |
285 | ||
286 | function Building_Static_DT (Typ : Entity_Id) return Boolean is | |
cc60bd16 | 287 | Root_Typ : Entity_Id := Root_Type (Typ); |
288 | ||
24971415 | 289 | begin |
cc60bd16 | 290 | -- Handle private types |
291 | ||
292 | if Present (Full_View (Root_Typ)) then | |
293 | Root_Typ := Full_View (Root_Typ); | |
294 | end if; | |
295 | ||
24971415 | 296 | return Static_Dispatch_Tables |
e7e688dd | 297 | and then Is_Library_Level_Tagged_Type (Typ) |
298 | ||
299 | -- If the type is derived from a CPP class we cannot statically | |
300 | -- build the dispatch tables because we must inherit primitives | |
301 | -- from the CPP side. | |
302 | ||
cc60bd16 | 303 | and then not Is_CPP_Class (Root_Typ); |
24971415 | 304 | end Building_Static_DT; |
305 | ||
17e14451 | 306 | ---------------------------------- |
307 | -- Build_Static_Dispatch_Tables -- | |
308 | ---------------------------------- | |
309 | ||
310 | procedure Build_Static_Dispatch_Tables (N : Entity_Id) is | |
311 | Target_List : List_Id; | |
312 | ||
313 | procedure Build_Dispatch_Tables (List : List_Id); | |
314 | -- Build the static dispatch table of tagged types found in the list of | |
315 | -- declarations. The generated nodes are added at the end of Target_List | |
316 | ||
317 | procedure Build_Package_Dispatch_Tables (N : Node_Id); | |
318 | -- Build static dispatch tables associated with package declaration N | |
319 | ||
320 | --------------------------- | |
321 | -- Build_Dispatch_Tables -- | |
322 | --------------------------- | |
323 | ||
324 | procedure Build_Dispatch_Tables (List : List_Id) is | |
325 | D : Node_Id; | |
326 | ||
327 | begin | |
328 | D := First (List); | |
329 | while Present (D) loop | |
330 | ||
331 | -- Handle nested packages and package bodies recursively. The | |
332 | -- generated code is placed on the Target_List established for | |
333 | -- the enclosing compilation unit. | |
334 | ||
335 | if Nkind (D) = N_Package_Declaration then | |
336 | Build_Package_Dispatch_Tables (D); | |
337 | ||
338 | elsif Nkind (D) = N_Package_Body then | |
339 | Build_Dispatch_Tables (Declarations (D)); | |
340 | ||
341 | elsif Nkind (D) = N_Package_Body_Stub | |
342 | and then Present (Library_Unit (D)) | |
343 | then | |
344 | Build_Dispatch_Tables | |
345 | (Declarations (Proper_Body (Unit (Library_Unit (D))))); | |
346 | ||
347 | -- Handle full type declarations and derivations of library | |
348 | -- level tagged types | |
349 | ||
3164ed99 | 350 | elsif Nkind_In (D, N_Full_Type_Declaration, |
351 | N_Derived_Type_Definition) | |
17e14451 | 352 | and then Is_Library_Level_Tagged_Type (Defining_Entity (D)) |
353 | and then Ekind (Defining_Entity (D)) /= E_Record_Subtype | |
354 | and then not Is_Private_Type (Defining_Entity (D)) | |
355 | then | |
442049cc | 356 | -- We do not generate dispatch tables for the internal types |
d9fac90e | 357 | -- created for a type extension with unknown discriminants |
358 | -- The needed information is shared with the source type, | |
359 | -- See Expand_N_Record_Extension. | |
360 | ||
442049cc | 361 | if Is_Underlying_Record_View (Defining_Entity (D)) |
362 | or else | |
363 | (not Comes_From_Source (Defining_Entity (D)) | |
364 | and then | |
2f29393f | 365 | Has_Unknown_Discriminants (Etype (Defining_Entity (D))) |
442049cc | 366 | and then |
2f29393f | 367 | not Comes_From_Source |
368 | (First_Subtype (Defining_Entity (D)))) | |
d9fac90e | 369 | then |
370 | null; | |
d9fac90e | 371 | else |
372 | Insert_List_After_And_Analyze (Last (Target_List), | |
373 | Make_DT (Defining_Entity (D))); | |
374 | end if; | |
17e14451 | 375 | |
376 | -- Handle private types of library level tagged types. We must | |
377 | -- exchange the private and full-view to ensure the correct | |
a735d663 | 378 | -- expansion. If the full view is a synchronized type ignore |
379 | -- the type because the table will be built for the corresponding | |
380 | -- record type, that has its own declaration. | |
17e14451 | 381 | |
382 | elsif (Nkind (D) = N_Private_Type_Declaration | |
383 | or else Nkind (D) = N_Private_Extension_Declaration) | |
384 | and then Present (Full_View (Defining_Entity (D))) | |
17e14451 | 385 | then |
386 | declare | |
acf97c11 | 387 | E1 : constant Entity_Id := Defining_Entity (D); |
a735d663 | 388 | E2 : constant Entity_Id := Full_View (E1); |
acf97c11 | 389 | |
17e14451 | 390 | begin |
a735d663 | 391 | if Is_Library_Level_Tagged_Type (E2) |
392 | and then Ekind (E2) /= E_Record_Subtype | |
393 | and then not Is_Concurrent_Type (E2) | |
394 | then | |
395 | Exchange_Declarations (E1); | |
396 | Insert_List_After_And_Analyze (Last (Target_List), | |
397 | Make_DT (E1)); | |
398 | Exchange_Declarations (E2); | |
399 | end if; | |
17e14451 | 400 | end; |
401 | end if; | |
402 | ||
403 | Next (D); | |
404 | end loop; | |
405 | end Build_Dispatch_Tables; | |
406 | ||
407 | ----------------------------------- | |
408 | -- Build_Package_Dispatch_Tables -- | |
409 | ----------------------------------- | |
410 | ||
411 | procedure Build_Package_Dispatch_Tables (N : Node_Id) is | |
412 | Spec : constant Node_Id := Specification (N); | |
413 | Id : constant Entity_Id := Defining_Entity (N); | |
414 | Vis_Decls : constant List_Id := Visible_Declarations (Spec); | |
415 | Priv_Decls : constant List_Id := Private_Declarations (Spec); | |
416 | ||
417 | begin | |
418 | Push_Scope (Id); | |
419 | ||
420 | if Present (Priv_Decls) then | |
421 | Build_Dispatch_Tables (Vis_Decls); | |
422 | Build_Dispatch_Tables (Priv_Decls); | |
423 | ||
424 | elsif Present (Vis_Decls) then | |
425 | Build_Dispatch_Tables (Vis_Decls); | |
426 | end if; | |
427 | ||
428 | Pop_Scope; | |
429 | end Build_Package_Dispatch_Tables; | |
430 | ||
431 | -- Start of processing for Build_Static_Dispatch_Tables | |
432 | ||
433 | begin | |
434 | if not Expander_Active | |
662256db | 435 | or else not Tagged_Type_Expansion |
17e14451 | 436 | then |
437 | return; | |
438 | end if; | |
439 | ||
440 | if Nkind (N) = N_Package_Declaration then | |
441 | declare | |
442 | Spec : constant Node_Id := Specification (N); | |
443 | Vis_Decls : constant List_Id := Visible_Declarations (Spec); | |
444 | Priv_Decls : constant List_Id := Private_Declarations (Spec); | |
445 | ||
446 | begin | |
447 | if Present (Priv_Decls) | |
448 | and then Is_Non_Empty_List (Priv_Decls) | |
449 | then | |
450 | Target_List := Priv_Decls; | |
451 | ||
452 | elsif not Present (Vis_Decls) then | |
453 | Target_List := New_List; | |
454 | Set_Private_Declarations (Spec, Target_List); | |
455 | else | |
456 | Target_List := Vis_Decls; | |
457 | end if; | |
458 | ||
459 | Build_Package_Dispatch_Tables (N); | |
460 | end; | |
461 | ||
462 | else pragma Assert (Nkind (N) = N_Package_Body); | |
463 | Target_List := Declarations (N); | |
464 | Build_Dispatch_Tables (Target_List); | |
465 | end if; | |
466 | end Build_Static_Dispatch_Tables; | |
467 | ||
f235fede | 468 | ------------------------------ |
469 | -- Convert_Tag_To_Interface -- | |
470 | ------------------------------ | |
471 | ||
472 | function Convert_Tag_To_Interface | |
473 | (Typ : Entity_Id; | |
474 | Expr : Node_Id) return Node_Id | |
475 | is | |
476 | Loc : constant Source_Ptr := Sloc (Expr); | |
477 | Anon_Type : Entity_Id; | |
478 | Result : Node_Id; | |
479 | ||
480 | begin | |
481 | pragma Assert (Is_Class_Wide_Type (Typ) | |
482 | and then Is_Interface (Typ) | |
483 | and then | |
484 | ((Nkind (Expr) = N_Selected_Component | |
4c58ddd7 | 485 | and then Is_Tag (Entity (Selector_Name (Expr)))) |
f235fede | 486 | or else |
487 | (Nkind (Expr) = N_Function_Call | |
4c58ddd7 | 488 | and then RTE_Available (RE_Displace) |
489 | and then Entity (Name (Expr)) = RTE (RE_Displace)))); | |
f235fede | 490 | |
491 | Anon_Type := Create_Itype (E_Anonymous_Access_Type, Expr); | |
492 | Set_Directly_Designated_Type (Anon_Type, Typ); | |
493 | Set_Etype (Anon_Type, Anon_Type); | |
494 | Set_Can_Never_Be_Null (Anon_Type); | |
495 | ||
496 | -- Decorate the size and alignment attributes of the anonymous access | |
497 | -- type, as required by gigi. | |
498 | ||
499 | Layout_Type (Anon_Type); | |
500 | ||
501 | if Nkind (Expr) = N_Selected_Component | |
502 | and then Is_Tag (Entity (Selector_Name (Expr))) | |
503 | then | |
504 | Result := | |
505 | Make_Explicit_Dereference (Loc, | |
506 | Unchecked_Convert_To (Anon_Type, | |
507 | Make_Attribute_Reference (Loc, | |
508 | Prefix => Expr, | |
509 | Attribute_Name => Name_Address))); | |
510 | else | |
511 | Result := | |
512 | Make_Explicit_Dereference (Loc, | |
513 | Unchecked_Convert_To (Anon_Type, Expr)); | |
514 | end if; | |
515 | ||
516 | return Result; | |
517 | end Convert_Tag_To_Interface; | |
518 | ||
d00681a7 | 519 | ------------------- |
520 | -- CPP_Num_Prims -- | |
521 | ------------------- | |
522 | ||
523 | function CPP_Num_Prims (Typ : Entity_Id) return Nat is | |
524 | CPP_Typ : Entity_Id; | |
525 | Tag_Comp : Entity_Id; | |
526 | ||
527 | begin | |
528 | if not Is_Tagged_Type (Typ) | |
529 | or else not Is_CPP_Class (Root_Type (Typ)) | |
530 | then | |
531 | return 0; | |
532 | ||
533 | else | |
534 | CPP_Typ := Enclosing_CPP_Parent (Typ); | |
535 | Tag_Comp := First_Tag_Component (CPP_Typ); | |
536 | ||
537 | -- If the number of primitives is already set in the tag component | |
538 | -- then use it | |
539 | ||
540 | if Present (Tag_Comp) | |
541 | and then DT_Entry_Count (Tag_Comp) /= No_Uint | |
542 | then | |
543 | return UI_To_Int (DT_Entry_Count (Tag_Comp)); | |
544 | ||
545 | -- Otherwise, count the primitives of the enclosing CPP type | |
546 | ||
547 | else | |
548 | declare | |
549 | Count : Nat := 0; | |
550 | Elmt : Elmt_Id; | |
551 | ||
552 | begin | |
553 | Elmt := First_Elmt (Primitive_Operations (CPP_Typ)); | |
554 | while Present (Elmt) loop | |
555 | Count := Count + 1; | |
556 | Next_Elmt (Elmt); | |
557 | end loop; | |
558 | ||
559 | return Count; | |
560 | end; | |
561 | end if; | |
562 | end if; | |
563 | end CPP_Num_Prims; | |
564 | ||
aad6babd | 565 | ------------------------------ |
566 | -- Default_Prim_Op_Position -- | |
567 | ------------------------------ | |
568 | ||
68f95949 | 569 | function Default_Prim_Op_Position (E : Entity_Id) return Uint is |
aad6babd | 570 | TSS_Name : TSS_Name_Type; |
aad6babd | 571 | |
572 | begin | |
aad6babd | 573 | Get_Name_String (Chars (E)); |
574 | TSS_Name := | |
575 | TSS_Name_Type | |
576 | (Name_Buffer (Name_Len - TSS_Name'Length + 1 .. Name_Len)); | |
577 | ||
578 | if Chars (E) = Name_uSize then | |
579 | return Uint_1; | |
580 | ||
581 | elsif Chars (E) = Name_uAlignment then | |
582 | return Uint_2; | |
583 | ||
584 | elsif TSS_Name = TSS_Stream_Read then | |
585 | return Uint_3; | |
586 | ||
587 | elsif TSS_Name = TSS_Stream_Write then | |
588 | return Uint_4; | |
589 | ||
590 | elsif TSS_Name = TSS_Stream_Input then | |
591 | return Uint_5; | |
592 | ||
593 | elsif TSS_Name = TSS_Stream_Output then | |
594 | return Uint_6; | |
595 | ||
596 | elsif Chars (E) = Name_Op_Eq then | |
597 | return Uint_7; | |
598 | ||
599 | elsif Chars (E) = Name_uAssign then | |
600 | return Uint_8; | |
601 | ||
602 | elsif TSS_Name = TSS_Deep_Adjust then | |
603 | return Uint_9; | |
604 | ||
605 | elsif TSS_Name = TSS_Deep_Finalize then | |
606 | return Uint_10; | |
607 | ||
de54c5ab | 608 | elsif Ada_Version >= Ada_2005 then |
76a1c25b | 609 | if Chars (E) = Name_uDisp_Asynchronous_Select then |
610 | return Uint_11; | |
d62940bf | 611 | |
76a1c25b | 612 | elsif Chars (E) = Name_uDisp_Conditional_Select then |
613 | return Uint_12; | |
d62940bf | 614 | |
76a1c25b | 615 | elsif Chars (E) = Name_uDisp_Get_Prim_Op_Kind then |
616 | return Uint_13; | |
d62940bf | 617 | |
76a1c25b | 618 | elsif Chars (E) = Name_uDisp_Get_Task_Id then |
619 | return Uint_14; | |
d62940bf | 620 | |
cdb1c38f | 621 | elsif Chars (E) = Name_uDisp_Requeue then |
76a1c25b | 622 | return Uint_15; |
cdb1c38f | 623 | |
624 | elsif Chars (E) = Name_uDisp_Timed_Select then | |
625 | return Uint_16; | |
76a1c25b | 626 | end if; |
aad6babd | 627 | end if; |
76a1c25b | 628 | |
629 | raise Program_Error; | |
aad6babd | 630 | end Default_Prim_Op_Position; |
631 | ||
7189d17f | 632 | ----------------------------- |
633 | -- Expand_Dispatching_Call -- | |
634 | ----------------------------- | |
ee6ba406 | 635 | |
7189d17f | 636 | procedure Expand_Dispatching_Call (Call_Node : Node_Id) is |
ee6ba406 | 637 | Loc : constant Source_Ptr := Sloc (Call_Node); |
638 | Call_Typ : constant Entity_Id := Etype (Call_Node); | |
639 | ||
2ea346ac | 640 | Ctrl_Arg : constant Node_Id := Controlling_Argument (Call_Node); |
641 | Ctrl_Typ : constant Entity_Id := Base_Type (Etype (Ctrl_Arg)); | |
642 | Param_List : constant List_Id := Parameter_Associations (Call_Node); | |
ee6ba406 | 643 | |
af647dc7 | 644 | Subp : Entity_Id; |
7189d17f | 645 | CW_Typ : Entity_Id; |
646 | New_Call : Node_Id; | |
647 | New_Call_Name : Node_Id; | |
648 | New_Params : List_Id := No_List; | |
649 | Param : Node_Id; | |
650 | Res_Typ : Entity_Id; | |
651 | Subp_Ptr_Typ : Entity_Id; | |
652 | Subp_Typ : Entity_Id; | |
653 | Typ : Entity_Id; | |
654 | Eq_Prim_Op : Entity_Id := Empty; | |
655 | Controlling_Tag : Node_Id; | |
ee6ba406 | 656 | |
657 | function New_Value (From : Node_Id) return Node_Id; | |
9dfe12ae | 658 | -- From is the original Expression. New_Value is equivalent to a call |
659 | -- to Duplicate_Subexpr with an explicit dereference when From is an | |
7189d17f | 660 | -- access parameter. |
661 | ||
9dfe12ae | 662 | --------------- |
663 | -- New_Value -- | |
664 | --------------- | |
665 | ||
ee6ba406 | 666 | function New_Value (From : Node_Id) return Node_Id is |
667 | Res : constant Node_Id := Duplicate_Subexpr (From); | |
ee6ba406 | 668 | begin |
669 | if Is_Access_Type (Etype (From)) then | |
af647dc7 | 670 | return |
671 | Make_Explicit_Dereference (Sloc (From), | |
672 | Prefix => Res); | |
ee6ba406 | 673 | else |
674 | return Res; | |
675 | end if; | |
676 | end New_Value; | |
677 | ||
d215f619 | 678 | -- Local variables |
679 | ||
5a44b136 | 680 | New_Node : Node_Id; |
681 | SCIL_Node : Node_Id; | |
682 | SCIL_Related_Node : Node_Id := Call_Node; | |
d215f619 | 683 | |
7189d17f | 684 | -- Start of processing for Expand_Dispatching_Call |
ee6ba406 | 685 | |
686 | begin | |
725a69d2 | 687 | if No_Run_Time_Mode then |
688 | Error_Msg_CRT ("tagged types", Call_Node); | |
689 | return; | |
690 | end if; | |
691 | ||
343d35dc | 692 | -- Expand_Dispatching_Call is called directly from the semantics, |
693 | -- so we need a check to see whether expansion is active before | |
694 | -- proceeding. In addition, there is no need to expand the call | |
695 | -- if we are compiling under restriction No_Dispatching_Calls; | |
696 | -- the semantic analyzer has previously notified the violation | |
697 | -- of this restriction. | |
698 | ||
699 | if not Expander_Active | |
700 | or else Restriction_Active (No_Dispatching_Calls) | |
701 | then | |
702 | return; | |
703 | end if; | |
68f95949 | 704 | |
af647dc7 | 705 | -- Set subprogram. If this is an inherited operation that was |
706 | -- overridden, the body that is being called is its alias. | |
707 | ||
708 | Subp := Entity (Name (Call_Node)); | |
ee6ba406 | 709 | |
710 | if Present (Alias (Subp)) | |
711 | and then Is_Inherited_Operation (Subp) | |
712 | and then No (DTC_Entity (Subp)) | |
713 | then | |
714 | Subp := Alias (Subp); | |
715 | end if; | |
716 | ||
7189d17f | 717 | -- Definition of the class-wide type and the tagged type |
ee6ba406 | 718 | |
7189d17f | 719 | -- If the controlling argument is itself a tag rather than a tagged |
720 | -- object, then use the class-wide type associated with the subprogram's | |
721 | -- controlling type. This case can occur when a call to an inherited | |
722 | -- primitive has an actual that originated from a default parameter | |
723 | -- given by a tag-indeterminate call and when there is no other | |
724 | -- controlling argument providing the tag (AI-239 requires dispatching). | |
725 | -- This capability of dispatching directly by tag is also needed by the | |
726 | -- implementation of AI-260 (for the generic dispatching constructors). | |
727 | ||
2ea346ac | 728 | if Ctrl_Typ = RTE (RE_Tag) |
68f95949 | 729 | or else (RTE_Available (RE_Interface_Tag) |
2ea346ac | 730 | and then Ctrl_Typ = RTE (RE_Interface_Tag)) |
aad6babd | 731 | then |
af647dc7 | 732 | CW_Typ := Class_Wide_Type (Find_Dispatching_Type (Subp)); |
7189d17f | 733 | |
725a69d2 | 734 | -- Class_Wide_Type is applied to the expressions used to initialize |
735 | -- CW_Typ, to ensure that CW_Typ always denotes a class-wide type, since | |
736 | -- there are cases where the controlling type is resolved to a specific | |
737 | -- type (such as for designated types of arguments such as CW'Access). | |
738 | ||
2ea346ac | 739 | elsif Is_Access_Type (Ctrl_Typ) then |
740 | CW_Typ := Class_Wide_Type (Designated_Type (Ctrl_Typ)); | |
7189d17f | 741 | |
ee6ba406 | 742 | else |
2ea346ac | 743 | CW_Typ := Class_Wide_Type (Ctrl_Typ); |
ee6ba406 | 744 | end if; |
745 | ||
746 | Typ := Root_Type (CW_Typ); | |
747 | ||
d62940bf | 748 | if Ekind (Typ) = E_Incomplete_Type then |
749 | Typ := Non_Limited_View (Typ); | |
750 | end if; | |
751 | ||
ee6ba406 | 752 | if not Is_Limited_Type (Typ) then |
753 | Eq_Prim_Op := Find_Prim_Op (Typ, Name_Op_Eq); | |
754 | end if; | |
755 | ||
343d35dc | 756 | -- Dispatching call to C++ primitive. Create a new parameter list |
757 | -- with no tag checks. | |
ee6ba406 | 758 | |
cd534f03 | 759 | New_Params := New_List; |
760 | ||
343d35dc | 761 | if Is_CPP_Class (Typ) then |
ee6ba406 | 762 | Param := First_Actual (Call_Node); |
763 | while Present (Param) loop | |
aad6babd | 764 | Append_To (New_Params, Relocate_Node (Param)); |
ee6ba406 | 765 | Next_Actual (Param); |
766 | end loop; | |
767 | ||
343d35dc | 768 | -- Dispatching call to Ada primitive |
769 | ||
ee6ba406 | 770 | elsif Present (Param_List) then |
cd534f03 | 771 | Apply_Tag_Checks (Call_Node); |
ee6ba406 | 772 | |
ee6ba406 | 773 | Param := First_Actual (Call_Node); |
774 | while Present (Param) loop | |
cd534f03 | 775 | -- Cases in which we may have generated runtime checks |
ee6ba406 | 776 | |
cd534f03 | 777 | if Param = Ctrl_Arg |
778 | or else Subp = Eq_Prim_Op | |
779 | then | |
9dfe12ae | 780 | Append_To (New_Params, |
781 | Duplicate_Subexpr_Move_Checks (Param)); | |
ee6ba406 | 782 | |
0429d533 | 783 | elsif Nkind (Parent (Param)) /= N_Parameter_Association |
784 | or else not Is_Accessibility_Actual (Parent (Param)) | |
785 | then | |
ee6ba406 | 786 | Append_To (New_Params, Relocate_Node (Param)); |
787 | end if; | |
788 | ||
789 | Next_Actual (Param); | |
790 | end loop; | |
791 | end if; | |
792 | ||
793 | -- Generate the appropriate subprogram pointer type | |
794 | ||
68f95949 | 795 | if Etype (Subp) = Typ then |
ee6ba406 | 796 | Res_Typ := CW_Typ; |
797 | else | |
7189d17f | 798 | Res_Typ := Etype (Subp); |
ee6ba406 | 799 | end if; |
800 | ||
b6b96867 | 801 | Subp_Typ := Create_Itype (E_Subprogram_Type, Call_Node); |
ee6ba406 | 802 | Subp_Ptr_Typ := Create_Itype (E_Access_Subprogram_Type, Call_Node); |
803 | Set_Etype (Subp_Typ, Res_Typ); | |
ee6ba406 | 804 | Set_Returns_By_Ref (Subp_Typ, Returns_By_Ref (Subp)); |
805 | ||
806 | -- Create a new list of parameters which is a copy of the old formal | |
807 | -- list including the creation of a new set of matching entities. | |
808 | ||
809 | declare | |
810 | Old_Formal : Entity_Id := First_Formal (Subp); | |
811 | New_Formal : Entity_Id; | |
725a69d2 | 812 | Extra : Entity_Id := Empty; |
ee6ba406 | 813 | |
814 | begin | |
815 | if Present (Old_Formal) then | |
816 | New_Formal := New_Copy (Old_Formal); | |
817 | Set_First_Entity (Subp_Typ, New_Formal); | |
818 | Param := First_Actual (Call_Node); | |
819 | ||
820 | loop | |
821 | Set_Scope (New_Formal, Subp_Typ); | |
822 | ||
823 | -- Change all the controlling argument types to be class-wide | |
7189d17f | 824 | -- to avoid a recursion in dispatching. |
ee6ba406 | 825 | |
7189d17f | 826 | if Is_Controlling_Formal (New_Formal) then |
ee6ba406 | 827 | Set_Etype (New_Formal, Etype (Param)); |
828 | end if; | |
829 | ||
cc60bd16 | 830 | -- If the type of the formal is an itype, there was code here |
831 | -- introduced in 1998 in revision 1.46, to create a new itype | |
832 | -- by copy. This seems useless, and in fact leads to semantic | |
833 | -- errors when the itype is the completion of a type derived | |
834 | -- from a private type. | |
ee6ba406 | 835 | |
836 | Extra := New_Formal; | |
837 | Next_Formal (Old_Formal); | |
838 | exit when No (Old_Formal); | |
839 | ||
840 | Set_Next_Entity (New_Formal, New_Copy (Old_Formal)); | |
841 | Next_Entity (New_Formal); | |
842 | Next_Actual (Param); | |
843 | end loop; | |
af647dc7 | 844 | |
845 | Set_Next_Entity (New_Formal, Empty); | |
ee6ba406 | 846 | Set_Last_Entity (Subp_Typ, Extra); |
725a69d2 | 847 | end if; |
ee6ba406 | 848 | |
725a69d2 | 849 | -- Now that the explicit formals have been duplicated, any extra |
850 | -- formals needed by the subprogram must be created. | |
ee6ba406 | 851 | |
725a69d2 | 852 | if Present (Extra) then |
853 | Set_Extra_Formal (Extra, Empty); | |
ee6ba406 | 854 | end if; |
725a69d2 | 855 | |
856 | Create_Extra_Formals (Subp_Typ); | |
ee6ba406 | 857 | end; |
858 | ||
b6b96867 | 859 | -- Complete description of pointer type, including size information, as |
860 | -- must be done with itypes to prevent order-of-elaboration anomalies | |
861 | -- in gigi. | |
862 | ||
ee6ba406 | 863 | Set_Etype (Subp_Ptr_Typ, Subp_Ptr_Typ); |
864 | Set_Directly_Designated_Type (Subp_Ptr_Typ, Subp_Typ); | |
acf97c11 | 865 | Set_Convention (Subp_Ptr_Typ, Convention (Subp_Typ)); |
b6b96867 | 866 | Layout_Type (Subp_Ptr_Typ); |
ee6ba406 | 867 | |
68f95949 | 868 | -- If the controlling argument is a value of type Ada.Tag or an abstract |
869 | -- interface class-wide type then use it directly. Otherwise, the tag | |
870 | -- must be extracted from the controlling object. | |
7189d17f | 871 | |
2ea346ac | 872 | if Ctrl_Typ = RTE (RE_Tag) |
68f95949 | 873 | or else (RTE_Available (RE_Interface_Tag) |
2ea346ac | 874 | and then Ctrl_Typ = RTE (RE_Interface_Tag)) |
68f95949 | 875 | then |
876 | Controlling_Tag := Duplicate_Subexpr (Ctrl_Arg); | |
877 | ||
343d35dc | 878 | -- Extract the tag from an unchecked type conversion. Done to avoid |
879 | -- the expansion of additional code just to obtain the value of such | |
880 | -- tag because the current management of interface type conversions | |
881 | -- generates in some cases this unchecked type conversion with the | |
882 | -- tag of the object (see Expand_Interface_Conversion). | |
883 | ||
884 | elsif Nkind (Ctrl_Arg) = N_Unchecked_Type_Conversion | |
885 | and then | |
886 | (Etype (Expression (Ctrl_Arg)) = RTE (RE_Tag) | |
887 | or else | |
888 | (RTE_Available (RE_Interface_Tag) | |
889 | and then | |
890 | Etype (Expression (Ctrl_Arg)) = RTE (RE_Interface_Tag))) | |
891 | then | |
892 | Controlling_Tag := Duplicate_Subexpr (Expression (Ctrl_Arg)); | |
893 | ||
68f95949 | 894 | -- Ada 2005 (AI-251): Abstract interface class-wide type |
895 | ||
2ea346ac | 896 | elsif Is_Interface (Ctrl_Typ) |
897 | and then Is_Class_Wide_Type (Ctrl_Typ) | |
aad6babd | 898 | then |
7189d17f | 899 | Controlling_Tag := Duplicate_Subexpr (Ctrl_Arg); |
900 | ||
901 | else | |
902 | Controlling_Tag := | |
903 | Make_Selected_Component (Loc, | |
1ea4332a | 904 | Prefix => Duplicate_Subexpr_Move_Checks (Ctrl_Arg), |
7189d17f | 905 | Selector_Name => New_Reference_To (DTC_Entity (Subp), Loc)); |
906 | end if; | |
907 | ||
1ea4332a | 908 | -- Handle dispatching calls to predefined primitives |
ee6ba406 | 909 | |
af647dc7 | 910 | if Is_Predefined_Dispatching_Operation (Subp) |
911 | or else Is_Predefined_Dispatching_Alias (Subp) | |
912 | then | |
ef40be71 | 913 | Build_Get_Predefined_Prim_Op_Address (Loc, |
914 | Tag_Node => Controlling_Tag, | |
915 | Position => DT_Position (Subp), | |
916 | New_Node => New_Node); | |
ee6ba406 | 917 | |
343d35dc | 918 | -- Handle dispatching calls to user-defined primitives |
68f95949 | 919 | |
920 | else | |
ef40be71 | 921 | Build_Get_Prim_Op_Address (Loc, |
922 | Typ => Find_Dispatching_Type (Subp), | |
923 | Tag_Node => Controlling_Tag, | |
924 | Position => DT_Position (Subp), | |
925 | New_Node => New_Node); | |
68f95949 | 926 | end if; |
ee6ba406 | 927 | |
ef40be71 | 928 | New_Call_Name := |
929 | Unchecked_Convert_To (Subp_Ptr_Typ, New_Node); | |
930 | ||
5a44b136 | 931 | -- Generate the SCIL node for this dispatching call. Done now because |
932 | -- attribute SCIL_Controlling_Tag must be set after the new call name | |
933 | -- is built to reference the nodes that will see the SCIL backend | |
934 | -- (because Build_Get_Prim_Op_Address generates an unchecked type | |
935 | -- conversion which relocates the controlling tag node). | |
ee6ba406 | 936 | |
ef40be71 | 937 | if Generate_SCIL then |
5a44b136 | 938 | SCIL_Node := Make_SCIL_Dispatching_Call (Sloc (Call_Node)); |
939 | Set_SCIL_Entity (SCIL_Node, Typ); | |
940 | Set_SCIL_Target_Prim (SCIL_Node, Subp); | |
ef40be71 | 941 | |
942 | -- Common case: the controlling tag is the tag of an object | |
943 | -- (for example, obj.tag) | |
944 | ||
945 | if Nkind (Controlling_Tag) = N_Selected_Component then | |
946 | Set_SCIL_Controlling_Tag (SCIL_Node, Controlling_Tag); | |
947 | ||
948 | -- Handle renaming of selected component | |
949 | ||
950 | elsif Nkind (Controlling_Tag) = N_Identifier | |
1ea4332a | 951 | and then Nkind (Parent (Entity (Controlling_Tag))) = |
952 | N_Object_Renaming_Declaration | |
953 | and then Nkind (Name (Parent (Entity (Controlling_Tag)))) = | |
954 | N_Selected_Component | |
ef40be71 | 955 | then |
956 | Set_SCIL_Controlling_Tag (SCIL_Node, | |
957 | Name (Parent (Entity (Controlling_Tag)))); | |
958 | ||
959 | -- If the controlling tag is an identifier, the SCIL node references | |
960 | -- the corresponding object or parameter declaration | |
961 | ||
962 | elsif Nkind (Controlling_Tag) = N_Identifier | |
963 | and then Nkind_In (Parent (Entity (Controlling_Tag)), | |
1ea4332a | 964 | N_Object_Declaration, |
965 | N_Parameter_Specification) | |
ef40be71 | 966 | then |
967 | Set_SCIL_Controlling_Tag (SCIL_Node, | |
968 | Parent (Entity (Controlling_Tag))); | |
969 | ||
970 | -- If the controlling tag is a dereference, the SCIL node references | |
971 | -- the corresponding object or parameter declaration | |
972 | ||
973 | elsif Nkind (Controlling_Tag) = N_Explicit_Dereference | |
974 | and then Nkind (Prefix (Controlling_Tag)) = N_Identifier | |
975 | and then Nkind_In (Parent (Entity (Prefix (Controlling_Tag))), | |
1ea4332a | 976 | N_Object_Declaration, |
977 | N_Parameter_Specification) | |
ef40be71 | 978 | then |
979 | Set_SCIL_Controlling_Tag (SCIL_Node, | |
980 | Parent (Entity (Prefix (Controlling_Tag)))); | |
981 | ||
982 | -- For a direct reference of the tag of the type the SCIL node | |
6fb3c314 | 983 | -- references the internal object declaration containing the tag |
ef40be71 | 984 | -- of the type. |
985 | ||
986 | elsif Nkind (Controlling_Tag) = N_Attribute_Reference | |
987 | and then Attribute_Name (Controlling_Tag) = Name_Tag | |
988 | then | |
989 | Set_SCIL_Controlling_Tag (SCIL_Node, | |
990 | Parent | |
1ea4332a | 991 | (Node |
992 | (First_Elmt | |
993 | (Access_Disp_Table (Entity (Prefix (Controlling_Tag))))))); | |
ef40be71 | 994 | |
995 | -- Interfaces are not supported. For now we leave the SCIL node | |
996 | -- decorated with the Controlling_Tag. More work needed here??? | |
997 | ||
998 | elsif Is_Interface (Etype (Controlling_Tag)) then | |
999 | Set_SCIL_Controlling_Tag (SCIL_Node, Controlling_Tag); | |
1000 | ||
1001 | else | |
1002 | pragma Assert (False); | |
1003 | null; | |
1004 | end if; | |
1005 | end if; | |
1006 | ||
1007 | if Nkind (Call_Node) = N_Function_Call then | |
725a69d2 | 1008 | New_Call := |
1009 | Make_Function_Call (Loc, | |
1ea4332a | 1010 | Name => New_Call_Name, |
725a69d2 | 1011 | Parameter_Associations => New_Params); |
ee6ba406 | 1012 | |
725a69d2 | 1013 | -- If this is a dispatching "=", we must first compare the tags so |
1014 | -- we generate: x.tag = y.tag and then x = y | |
ee6ba406 | 1015 | |
725a69d2 | 1016 | if Subp = Eq_Prim_Op then |
1017 | Param := First_Actual (Call_Node); | |
aad6babd | 1018 | New_Call := |
725a69d2 | 1019 | Make_And_Then (Loc, |
1020 | Left_Opnd => | |
1021 | Make_Op_Eq (Loc, | |
1022 | Left_Opnd => | |
1023 | Make_Selected_Component (Loc, | |
1ea4332a | 1024 | Prefix => New_Value (Param), |
725a69d2 | 1025 | Selector_Name => |
1026 | New_Reference_To (First_Tag_Component (Typ), | |
1027 | Loc)), | |
ee6ba406 | 1028 | |
725a69d2 | 1029 | Right_Opnd => |
1030 | Make_Selected_Component (Loc, | |
1ea4332a | 1031 | Prefix => |
725a69d2 | 1032 | Unchecked_Convert_To (Typ, |
1033 | New_Value (Next_Actual (Param))), | |
1034 | Selector_Name => | |
1ea4332a | 1035 | New_Reference_To |
1036 | (First_Tag_Component (Typ), Loc))), | |
725a69d2 | 1037 | Right_Opnd => New_Call); |
5a44b136 | 1038 | |
1039 | SCIL_Related_Node := Right_Opnd (New_Call); | |
ee6ba406 | 1040 | end if; |
1041 | ||
1042 | else | |
1043 | New_Call := | |
1044 | Make_Procedure_Call_Statement (Loc, | |
1ea4332a | 1045 | Name => New_Call_Name, |
ee6ba406 | 1046 | Parameter_Associations => New_Params); |
1047 | end if; | |
1048 | ||
e00e091c | 1049 | -- Register the dispatching call in the call graph nodes table |
1050 | ||
1051 | Register_CG_Node (Call_Node); | |
1052 | ||
ee6ba406 | 1053 | Rewrite (Call_Node, New_Call); |
725a69d2 | 1054 | |
5a44b136 | 1055 | -- Associate the SCIL node of this dispatching call |
1056 | ||
1057 | if Generate_SCIL then | |
1058 | Set_SCIL_Node (SCIL_Related_Node, SCIL_Node); | |
1059 | end if; | |
1060 | ||
725a69d2 | 1061 | -- Suppress all checks during the analysis of the expanded code |
36b938a3 | 1062 | -- to avoid the generation of spurious warnings under ZFP run-time. |
725a69d2 | 1063 | |
1064 | Analyze_And_Resolve (Call_Node, Call_Typ, Suppress => All_Checks); | |
7189d17f | 1065 | end Expand_Dispatching_Call; |
ee6ba406 | 1066 | |
aad6babd | 1067 | --------------------------------- |
1068 | -- Expand_Interface_Conversion -- | |
1069 | --------------------------------- | |
1070 | ||
952af0b9 | 1071 | procedure Expand_Interface_Conversion |
1072 | (N : Node_Id; | |
1073 | Is_Static : Boolean := True) | |
1074 | is | |
aad6babd | 1075 | Loc : constant Source_Ptr := Sloc (N); |
af647dc7 | 1076 | Etyp : constant Entity_Id := Etype (N); |
aad6babd | 1077 | Operand : constant Node_Id := Expression (N); |
1078 | Operand_Typ : Entity_Id := Etype (Operand); | |
d62940bf | 1079 | Func : Node_Id; |
af647dc7 | 1080 | Iface_Typ : Entity_Id := Etype (N); |
1081 | Iface_Tag : Entity_Id; | |
aad6babd | 1082 | |
1083 | begin | |
343d35dc | 1084 | -- Ada 2005 (AI-345): Handle synchronized interface type derivations |
aad6babd | 1085 | |
343d35dc | 1086 | if Is_Concurrent_Type (Operand_Typ) then |
1087 | Operand_Typ := Base_Type (Corresponding_Record_Type (Operand_Typ)); | |
aad6babd | 1088 | end if; |
1089 | ||
e7e688dd | 1090 | -- Handle access to class-wide interface types |
aad6babd | 1091 | |
d62940bf | 1092 | if Is_Access_Type (Iface_Typ) then |
1093 | Iface_Typ := Etype (Directly_Designated_Type (Iface_Typ)); | |
aad6babd | 1094 | end if; |
1095 | ||
d62940bf | 1096 | -- Handle class-wide interface types. This conversion can appear |
1097 | -- explicitly in the source code. Example: I'Class (Obj) | |
aad6babd | 1098 | |
d62940bf | 1099 | if Is_Class_Wide_Type (Iface_Typ) then |
725a69d2 | 1100 | Iface_Typ := Root_Type (Iface_Typ); |
d62940bf | 1101 | end if; |
1102 | ||
79a72728 | 1103 | -- If the target type is a tagged synchronized type, the dispatch table |
bf3e1520 | 1104 | -- info is in the corresponding record type. |
79a72728 | 1105 | |
1106 | if Is_Concurrent_Type (Iface_Typ) then | |
1107 | Iface_Typ := Corresponding_Record_Type (Iface_Typ); | |
1108 | end if; | |
1109 | ||
a17cc77d | 1110 | -- Freeze the entity associated with the target interface to have |
1111 | -- available the attribute Access_Disp_Table. | |
1112 | ||
1113 | Freeze_Before (N, Iface_Typ); | |
1114 | ||
af647dc7 | 1115 | pragma Assert (not Is_Static |
1116 | or else (not Is_Class_Wide_Type (Iface_Typ) | |
1117 | and then Is_Interface (Iface_Typ))); | |
aad6babd | 1118 | |
662256db | 1119 | if not Tagged_Type_Expansion then |
725a69d2 | 1120 | |
1121 | -- For VM, just do a conversion ??? | |
1122 | ||
1123 | Rewrite (N, Unchecked_Convert_To (Etype (N), N)); | |
1124 | Analyze (N); | |
1125 | return; | |
1126 | end if; | |
1127 | ||
952af0b9 | 1128 | if not Is_Static then |
68f95949 | 1129 | |
1130 | -- Give error if configurable run time and Displace not available | |
1131 | ||
1132 | if not RTE_Available (RE_Displace) then | |
cc60bd16 | 1133 | Error_Msg_CRT ("dynamic interface conversion", N); |
68f95949 | 1134 | return; |
1135 | end if; | |
1136 | ||
725a69d2 | 1137 | -- Handle conversion of access-to-class-wide interface types. Target |
1138 | -- can be an access to an object or an access to another class-wide | |
1139 | -- interface (see -1- and -2- in the following example): | |
af647dc7 | 1140 | |
1141 | -- type Iface1_Ref is access all Iface1'Class; | |
1142 | -- type Iface2_Ref is access all Iface1'Class; | |
1143 | ||
1144 | -- Acc1 : Iface1_Ref := new ... | |
1145 | -- Obj : Obj_Ref := Obj_Ref (Acc); -- 1 | |
1146 | -- Acc2 : Iface2_Ref := Iface2_Ref (Acc); -- 2 | |
1147 | ||
1148 | if Is_Access_Type (Operand_Typ) then | |
af647dc7 | 1149 | Rewrite (N, |
1150 | Unchecked_Convert_To (Etype (N), | |
1151 | Make_Function_Call (Loc, | |
1152 | Name => New_Reference_To (RTE (RE_Displace), Loc), | |
1153 | Parameter_Associations => New_List ( | |
1154 | ||
1155 | Unchecked_Convert_To (RTE (RE_Address), | |
1156 | Relocate_Node (Expression (N))), | |
1157 | ||
1158 | New_Occurrence_Of | |
1159 | (Node (First_Elmt (Access_Disp_Table (Iface_Typ))), | |
1160 | Loc))))); | |
1161 | ||
1162 | Analyze (N); | |
1163 | return; | |
1164 | end if; | |
1165 | ||
952af0b9 | 1166 | Rewrite (N, |
1167 | Make_Function_Call (Loc, | |
1168 | Name => New_Reference_To (RTE (RE_Displace), Loc), | |
1169 | Parameter_Associations => New_List ( | |
1170 | Make_Attribute_Reference (Loc, | |
1171 | Prefix => Relocate_Node (Expression (N)), | |
1172 | Attribute_Name => Name_Address), | |
af647dc7 | 1173 | |
952af0b9 | 1174 | New_Occurrence_Of |
1175 | (Node (First_Elmt (Access_Disp_Table (Iface_Typ))), | |
1176 | Loc)))); | |
1177 | ||
1178 | Analyze (N); | |
1179 | ||
af647dc7 | 1180 | -- If the target is a class-wide interface we change the type of the |
1181 | -- data returned by IW_Convert to indicate that this is a dispatching | |
1182 | -- call. | |
952af0b9 | 1183 | |
17e14451 | 1184 | declare |
1185 | New_Itype : Entity_Id; | |
952af0b9 | 1186 | |
17e14451 | 1187 | begin |
1188 | New_Itype := Create_Itype (E_Anonymous_Access_Type, N); | |
cc60bd16 | 1189 | Set_Etype (New_Itype, New_Itype); |
17e14451 | 1190 | Set_Directly_Designated_Type (New_Itype, Etyp); |
952af0b9 | 1191 | |
17e14451 | 1192 | Rewrite (N, |
1193 | Make_Explicit_Dereference (Loc, | |
1194 | Prefix => | |
1195 | Unchecked_Convert_To (New_Itype, Relocate_Node (N)))); | |
1196 | Analyze (N); | |
1197 | Freeze_Itype (New_Itype, N); | |
1198 | ||
1199 | return; | |
1200 | end; | |
952af0b9 | 1201 | end if; |
1202 | ||
d62940bf | 1203 | Iface_Tag := Find_Interface_Tag (Operand_Typ, Iface_Typ); |
aad6babd | 1204 | pragma Assert (Iface_Tag /= Empty); |
1205 | ||
d62940bf | 1206 | -- Keep separate access types to interfaces because one internal |
f235fede | 1207 | -- function is used to handle the null value (see following comments) |
d62940bf | 1208 | |
1209 | if not Is_Access_Type (Etype (N)) then | |
f235fede | 1210 | |
1211 | -- Statically displace the pointer to the object to reference | |
1212 | -- the component containing the secondary dispatch table. | |
1213 | ||
d62940bf | 1214 | Rewrite (N, |
f235fede | 1215 | Convert_Tag_To_Interface (Class_Wide_Type (Iface_Typ), |
d62940bf | 1216 | Make_Selected_Component (Loc, |
1217 | Prefix => Relocate_Node (Expression (N)), | |
f235fede | 1218 | Selector_Name => New_Occurrence_Of (Iface_Tag, Loc)))); |
d62940bf | 1219 | |
1220 | else | |
1221 | -- Build internal function to handle the case in which the | |
1222 | -- actual is null. If the actual is null returns null because | |
1223 | -- no displacement is required; otherwise performs a type | |
1224 | -- conversion that will be expanded in the code that returns | |
1225 | -- the value of the displaced actual. That is: | |
1226 | ||
af647dc7 | 1227 | -- function Func (O : Address) return Iface_Typ is |
17e14451 | 1228 | -- type Op_Typ is access all Operand_Typ; |
1229 | -- Aux : Op_Typ := To_Op_Typ (O); | |
d62940bf | 1230 | -- begin |
af647dc7 | 1231 | -- if O = Null_Address then |
d62940bf | 1232 | -- return null; |
1233 | -- else | |
17e14451 | 1234 | -- return Iface_Typ!(Aux.Iface_Tag'Address); |
d62940bf | 1235 | -- end if; |
1236 | -- end Func; | |
1237 | ||
af647dc7 | 1238 | declare |
17e14451 | 1239 | Desig_Typ : Entity_Id; |
1240 | Fent : Entity_Id; | |
1241 | New_Typ_Decl : Node_Id; | |
17e14451 | 1242 | Stats : List_Id; |
1243 | ||
af647dc7 | 1244 | begin |
1245 | Desig_Typ := Etype (Expression (N)); | |
d62940bf | 1246 | |
af647dc7 | 1247 | if Is_Access_Type (Desig_Typ) then |
865909d3 | 1248 | Desig_Typ := |
1249 | Available_View (Directly_Designated_Type (Desig_Typ)); | |
af647dc7 | 1250 | end if; |
d62940bf | 1251 | |
e7e688dd | 1252 | if Is_Concurrent_Type (Desig_Typ) then |
1253 | Desig_Typ := Base_Type (Corresponding_Record_Type (Desig_Typ)); | |
1254 | end if; | |
1255 | ||
17e14451 | 1256 | New_Typ_Decl := |
1257 | Make_Full_Type_Declaration (Loc, | |
ec97ce79 | 1258 | Defining_Identifier => Make_Temporary (Loc, 'T'), |
17e14451 | 1259 | Type_Definition => |
1260 | Make_Access_To_Object_Definition (Loc, | |
1261 | All_Present => True, | |
1262 | Null_Exclusion_Present => False, | |
1263 | Constant_Present => False, | |
1264 | Subtype_Indication => | |
1265 | New_Reference_To (Desig_Typ, Loc))); | |
d62940bf | 1266 | |
725a69d2 | 1267 | Stats := New_List ( |
17e14451 | 1268 | Make_Simple_Return_Statement (Loc, |
1269 | Unchecked_Convert_To (Etype (N), | |
1270 | Make_Attribute_Reference (Loc, | |
1271 | Prefix => | |
1272 | Make_Selected_Component (Loc, | |
1273 | Prefix => | |
e7e688dd | 1274 | Unchecked_Convert_To |
1275 | (Defining_Identifier (New_Typ_Decl), | |
1276 | Make_Identifier (Loc, Name_uO)), | |
17e14451 | 1277 | Selector_Name => |
1278 | New_Occurrence_Of (Iface_Tag, Loc)), | |
1279 | Attribute_Name => Name_Address)))); | |
725a69d2 | 1280 | |
17e14451 | 1281 | -- If the type is null-excluding, no need for the null branch. |
1282 | -- Otherwise we need to check for it and return null. | |
1283 | ||
1284 | if not Can_Never_Be_Null (Etype (N)) then | |
1285 | Stats := New_List ( | |
1286 | Make_If_Statement (Loc, | |
1287 | Condition => | |
1288 | Make_Op_Eq (Loc, | |
1289 | Left_Opnd => Make_Identifier (Loc, Name_uO), | |
1290 | Right_Opnd => New_Reference_To | |
1291 | (RTE (RE_Null_Address), Loc)), | |
1292 | ||
1293 | Then_Statements => New_List ( | |
1294 | Make_Simple_Return_Statement (Loc, | |
1295 | Make_Null (Loc))), | |
1296 | Else_Statements => Stats)); | |
1297 | end if; | |
d62940bf | 1298 | |
ec97ce79 | 1299 | Fent := Make_Temporary (Loc, 'F'); |
17e14451 | 1300 | Func := |
1301 | Make_Subprogram_Body (Loc, | |
1302 | Specification => | |
1303 | Make_Function_Specification (Loc, | |
1304 | Defining_Unit_Name => Fent, | |
d62940bf | 1305 | |
17e14451 | 1306 | Parameter_Specifications => New_List ( |
1307 | Make_Parameter_Specification (Loc, | |
1308 | Defining_Identifier => | |
1309 | Make_Defining_Identifier (Loc, Name_uO), | |
1310 | Parameter_Type => | |
1311 | New_Reference_To (RTE (RE_Address), Loc))), | |
d62940bf | 1312 | |
17e14451 | 1313 | Result_Definition => |
1314 | New_Reference_To (Etype (N), Loc)), | |
d62940bf | 1315 | |
e7e688dd | 1316 | Declarations => New_List (New_Typ_Decl), |
d62940bf | 1317 | |
17e14451 | 1318 | Handled_Statement_Sequence => |
1319 | Make_Handled_Sequence_Of_Statements (Loc, Stats)); | |
d62940bf | 1320 | |
17e14451 | 1321 | -- Place function body before the expression containing the |
1322 | -- conversion. We suppress all checks because the body of the | |
1323 | -- internally generated function already takes care of the case | |
1324 | -- in which the actual is null; therefore there is no need to | |
1325 | -- double check that the pointer is not null when the program | |
1326 | -- executes the alternative that performs the type conversion). | |
af647dc7 | 1327 | |
17e14451 | 1328 | Insert_Action (N, Func, Suppress => All_Checks); |
af647dc7 | 1329 | |
17e14451 | 1330 | if Is_Access_Type (Etype (Expression (N))) then |
af647dc7 | 1331 | |
e7e688dd | 1332 | -- Generate: Func (Address!(Expression)) |
af647dc7 | 1333 | |
17e14451 | 1334 | Rewrite (N, |
1335 | Make_Function_Call (Loc, | |
1336 | Name => New_Reference_To (Fent, Loc), | |
1337 | Parameter_Associations => New_List ( | |
e7e688dd | 1338 | Unchecked_Convert_To (RTE (RE_Address), |
1339 | Relocate_Node (Expression (N)))))); | |
17e14451 | 1340 | |
1341 | else | |
e7e688dd | 1342 | -- Generate: Func (Operand_Typ!(Expression)'Address) |
17e14451 | 1343 | |
1344 | Rewrite (N, | |
1345 | Make_Function_Call (Loc, | |
1346 | Name => New_Reference_To (Fent, Loc), | |
1347 | Parameter_Associations => New_List ( | |
1348 | Make_Attribute_Reference (Loc, | |
1349 | Prefix => Unchecked_Convert_To (Operand_Typ, | |
1350 | Relocate_Node (Expression (N))), | |
1351 | Attribute_Name => Name_Address)))); | |
1352 | end if; | |
1353 | end; | |
d62940bf | 1354 | end if; |
aad6babd | 1355 | |
1356 | Analyze (N); | |
1357 | end Expand_Interface_Conversion; | |
1358 | ||
1359 | ------------------------------ | |
1360 | -- Expand_Interface_Actuals -- | |
1361 | ------------------------------ | |
1362 | ||
1363 | procedure Expand_Interface_Actuals (Call_Node : Node_Id) is | |
aad6babd | 1364 | Actual : Node_Id; |
d62940bf | 1365 | Actual_Dup : Node_Id; |
aad6babd | 1366 | Actual_Typ : Entity_Id; |
d62940bf | 1367 | Anon : Entity_Id; |
aad6babd | 1368 | Conversion : Node_Id; |
1369 | Formal : Entity_Id; | |
1370 | Formal_Typ : Entity_Id; | |
1371 | Subp : Entity_Id; | |
d62940bf | 1372 | Formal_DDT : Entity_Id; |
1373 | Actual_DDT : Entity_Id; | |
aad6babd | 1374 | |
1375 | begin | |
1376 | -- This subprogram is called directly from the semantics, so we need a | |
1377 | -- check to see whether expansion is active before proceeding. | |
1378 | ||
1379 | if not Expander_Active then | |
1380 | return; | |
1381 | end if; | |
1382 | ||
1383 | -- Call using access to subprogram with explicit dereference | |
1384 | ||
1385 | if Nkind (Name (Call_Node)) = N_Explicit_Dereference then | |
1386 | Subp := Etype (Name (Call_Node)); | |
1387 | ||
4e5db562 | 1388 | -- Call using selected component |
1389 | ||
1390 | elsif Nkind (Name (Call_Node)) = N_Selected_Component then | |
1391 | Subp := Entity (Selector_Name (Name (Call_Node))); | |
1392 | ||
1393 | -- Call using direct name | |
aad6babd | 1394 | |
1395 | else | |
1396 | Subp := Entity (Name (Call_Node)); | |
1397 | end if; | |
1398 | ||
725a69d2 | 1399 | -- Ada 2005 (AI-251): Look for interface type formals to force "this" |
1400 | -- displacement | |
1401 | ||
aad6babd | 1402 | Formal := First_Formal (Subp); |
1403 | Actual := First_Actual (Call_Node); | |
aad6babd | 1404 | while Present (Formal) loop |
725a69d2 | 1405 | Formal_Typ := Etype (Formal); |
d62940bf | 1406 | |
1407 | if Ekind (Formal_Typ) = E_Record_Type_With_Private then | |
1408 | Formal_Typ := Full_View (Formal_Typ); | |
1409 | end if; | |
1410 | ||
1411 | if Is_Access_Type (Formal_Typ) then | |
1412 | Formal_DDT := Directly_Designated_Type (Formal_Typ); | |
1413 | end if; | |
1414 | ||
aad6babd | 1415 | Actual_Typ := Etype (Actual); |
1416 | ||
d62940bf | 1417 | if Is_Access_Type (Actual_Typ) then |
1418 | Actual_DDT := Directly_Designated_Type (Actual_Typ); | |
1419 | end if; | |
1420 | ||
725a69d2 | 1421 | if Is_Interface (Formal_Typ) |
1422 | and then Is_Class_Wide_Type (Formal_Typ) | |
1423 | then | |
d62940bf | 1424 | -- No need to displace the pointer if the type of the actual |
1d00a8ce | 1425 | -- coincides with the type of the formal. |
aad6babd | 1426 | |
725a69d2 | 1427 | if Actual_Typ = Formal_Typ then |
d62940bf | 1428 | null; |
1429 | ||
725a69d2 | 1430 | -- No need to displace the pointer if the interface type is |
1431 | -- a parent of the type of the actual because in this case the | |
1432 | -- interface primitives are located in the primary dispatch table. | |
aad6babd | 1433 | |
a652dd51 | 1434 | elsif Is_Ancestor (Formal_Typ, Actual_Typ) then |
d62940bf | 1435 | null; |
1436 | ||
725a69d2 | 1437 | -- Implicit conversion to the class-wide formal type to force |
1438 | -- the displacement of the pointer. | |
1439 | ||
d62940bf | 1440 | else |
8a8d9086 | 1441 | -- Normally, expansion of actuals for calls to build-in-place |
1442 | -- functions happens as part of Expand_Actuals, but in this | |
1443 | -- case the call will be wrapped in a conversion and soon after | |
1444 | -- expanded further to handle the displacement for a class-wide | |
1445 | -- interface conversion, so if this is a BIP call then we need | |
1446 | -- to handle it now. | |
1447 | ||
1448 | if Ada_Version >= Ada_2005 | |
1449 | and then Is_Build_In_Place_Function_Call (Actual) | |
1450 | then | |
1451 | Make_Build_In_Place_Call_In_Anonymous_Context (Actual); | |
1452 | end if; | |
1453 | ||
d62940bf | 1454 | Conversion := Convert_To (Formal_Typ, Relocate_Node (Actual)); |
725a69d2 | 1455 | Rewrite (Actual, Conversion); |
d62940bf | 1456 | Analyze_And_Resolve (Actual, Formal_Typ); |
1457 | end if; | |
aad6babd | 1458 | |
725a69d2 | 1459 | -- Access to class-wide interface type |
aad6babd | 1460 | |
1461 | elsif Is_Access_Type (Formal_Typ) | |
725a69d2 | 1462 | and then Is_Interface (Formal_DDT) |
1463 | and then Is_Class_Wide_Type (Formal_DDT) | |
aad6babd | 1464 | and then Interface_Present_In_Ancestor |
d62940bf | 1465 | (Typ => Actual_DDT, |
1466 | Iface => Etype (Formal_DDT)) | |
aad6babd | 1467 | then |
725a69d2 | 1468 | -- Handle attributes 'Access and 'Unchecked_Access |
1469 | ||
aad6babd | 1470 | if Nkind (Actual) = N_Attribute_Reference |
1471 | and then | |
1472 | (Attribute_Name (Actual) = Name_Access | |
1473 | or else Attribute_Name (Actual) = Name_Unchecked_Access) | |
1474 | then | |
5e82d8fe | 1475 | -- This case must have been handled by the analysis and |
1476 | -- expansion of 'Access. The only exception is when types | |
1477 | -- match and no further expansion is required. | |
aad6babd | 1478 | |
5e82d8fe | 1479 | pragma Assert (Base_Type (Etype (Prefix (Actual))) |
1480 | = Base_Type (Formal_DDT)); | |
1481 | null; | |
aad6babd | 1482 | |
725a69d2 | 1483 | -- No need to displace the pointer if the type of the actual |
1484 | -- coincides with the type of the formal. | |
d62940bf | 1485 | |
725a69d2 | 1486 | elsif Actual_DDT = Formal_DDT then |
d62940bf | 1487 | null; |
1488 | ||
725a69d2 | 1489 | -- No need to displace the pointer if the interface type is |
1490 | -- a parent of the type of the actual because in this case the | |
1491 | -- interface primitives are located in the primary dispatch table. | |
d62940bf | 1492 | |
a652dd51 | 1493 | elsif Is_Ancestor (Formal_DDT, Actual_DDT) then |
d62940bf | 1494 | null; |
1495 | ||
aad6babd | 1496 | else |
d62940bf | 1497 | Actual_Dup := Relocate_Node (Actual); |
1498 | ||
1499 | if From_With_Type (Actual_Typ) then | |
1500 | ||
1501 | -- If the type of the actual parameter comes from a limited | |
1502 | -- with-clause and the non-limited view is already available | |
9ced80be | 1503 | -- we replace the anonymous access type by a duplicate |
1504 | -- declaration whose designated type is the non-limited view | |
d62940bf | 1505 | |
1506 | if Ekind (Actual_DDT) = E_Incomplete_Type | |
1507 | and then Present (Non_Limited_View (Actual_DDT)) | |
1508 | then | |
1509 | Anon := New_Copy (Actual_Typ); | |
1510 | ||
1511 | if Is_Itype (Anon) then | |
1512 | Set_Scope (Anon, Current_Scope); | |
1513 | end if; | |
1514 | ||
1515 | Set_Directly_Designated_Type (Anon, | |
1516 | Non_Limited_View (Actual_DDT)); | |
1517 | Set_Etype (Actual_Dup, Anon); | |
1518 | ||
1519 | elsif Is_Class_Wide_Type (Actual_DDT) | |
1520 | and then Ekind (Etype (Actual_DDT)) = E_Incomplete_Type | |
1521 | and then Present (Non_Limited_View (Etype (Actual_DDT))) | |
1522 | then | |
1523 | Anon := New_Copy (Actual_Typ); | |
1524 | ||
1525 | if Is_Itype (Anon) then | |
1526 | Set_Scope (Anon, Current_Scope); | |
1527 | end if; | |
1528 | ||
1529 | Set_Directly_Designated_Type (Anon, | |
1530 | New_Copy (Actual_DDT)); | |
1531 | Set_Class_Wide_Type (Directly_Designated_Type (Anon), | |
1532 | New_Copy (Class_Wide_Type (Actual_DDT))); | |
1533 | Set_Etype (Directly_Designated_Type (Anon), | |
1534 | Non_Limited_View (Etype (Actual_DDT))); | |
1535 | Set_Etype ( | |
1536 | Class_Wide_Type (Directly_Designated_Type (Anon)), | |
1537 | Non_Limited_View (Etype (Actual_DDT))); | |
1538 | Set_Etype (Actual_Dup, Anon); | |
1539 | end if; | |
1540 | end if; | |
1541 | ||
1542 | Conversion := Convert_To (Formal_Typ, Actual_Dup); | |
1543 | Rewrite (Actual, Conversion); | |
aad6babd | 1544 | Analyze_And_Resolve (Actual, Formal_Typ); |
1545 | end if; | |
1546 | end if; | |
1547 | ||
1548 | Next_Actual (Actual); | |
1549 | Next_Formal (Formal); | |
1550 | end loop; | |
1551 | end Expand_Interface_Actuals; | |
1552 | ||
1553 | ---------------------------- | |
1554 | -- Expand_Interface_Thunk -- | |
1555 | ---------------------------- | |
1556 | ||
725a69d2 | 1557 | procedure Expand_Interface_Thunk |
17e14451 | 1558 | (Prim : Node_Id; |
1559 | Thunk_Id : out Entity_Id; | |
1560 | Thunk_Code : out Node_Id) | |
aad6babd | 1561 | is |
e8376947 | 1562 | Loc : constant Source_Ptr := Sloc (Prim); |
1563 | Actuals : constant List_Id := New_List; | |
1564 | Decl : constant List_Id := New_List; | |
1565 | Formals : constant List_Id := New_List; | |
1566 | Target : constant Entity_Id := Ultimate_Alias (Prim); | |
725a69d2 | 1567 | |
1568 | Controlling_Typ : Entity_Id; | |
1569 | Decl_1 : Node_Id; | |
1570 | Decl_2 : Node_Id; | |
04c6d723 | 1571 | Expr : Node_Id; |
725a69d2 | 1572 | Formal : Node_Id; |
04c6d723 | 1573 | Ftyp : Entity_Id; |
1574 | Iface_Formal : Node_Id; | |
cc60bd16 | 1575 | New_Arg : Node_Id; |
1576 | Offset_To_Top : Node_Id; | |
725a69d2 | 1577 | Target_Formal : Entity_Id; |
aad6babd | 1578 | |
1579 | begin | |
725a69d2 | 1580 | Thunk_Id := Empty; |
1581 | Thunk_Code := Empty; | |
1582 | ||
3f8cf2d2 | 1583 | -- No thunk needed if the primitive has been eliminated |
1584 | ||
1585 | if Is_Eliminated (Ultimate_Alias (Prim)) then | |
1586 | return; | |
1587 | ||
e8376947 | 1588 | -- In case of primitives that are functions without formals and a |
1589 | -- controlling result there is no need to build the thunk. | |
725a69d2 | 1590 | |
3f8cf2d2 | 1591 | elsif not Present (First_Formal (Target)) then |
725a69d2 | 1592 | pragma Assert (Ekind (Target) = E_Function |
1593 | and then Has_Controlling_Result (Target)); | |
1594 | return; | |
1595 | end if; | |
1596 | ||
04c6d723 | 1597 | -- Duplicate the formals of the Target primitive. In the thunk, the type |
1598 | -- of the controlling formal is the covered interface type (instead of | |
1599 | -- the target tagged type). Done to avoid problems with discriminated | |
1600 | -- tagged types because, if the controlling type has discriminants with | |
e8376947 | 1601 | -- default values, then the type conversions done inside the body of |
1602 | -- the thunk (after the displacement of the pointer to the base of the | |
04c6d723 | 1603 | -- actual object) generate code that modify its contents. |
1604 | ||
1605 | -- Note: This special management is not done for predefined primitives | |
1606 | -- because??? | |
1607 | ||
1608 | if not Is_Predefined_Dispatching_Operation (Prim) then | |
1609 | Iface_Formal := First_Formal (Interface_Alias (Prim)); | |
1610 | end if; | |
aad6babd | 1611 | |
d62940bf | 1612 | Formal := First_Formal (Target); |
aad6babd | 1613 | while Present (Formal) loop |
04c6d723 | 1614 | Ftyp := Etype (Formal); |
1615 | ||
1616 | -- Use the interface type as the type of the controlling formal (see | |
e8376947 | 1617 | -- comment above). |
04c6d723 | 1618 | |
1619 | if not Is_Controlling_Formal (Formal) | |
1620 | or else Is_Predefined_Dispatching_Operation (Prim) | |
1621 | then | |
1622 | Ftyp := Etype (Formal); | |
1623 | Expr := New_Copy_Tree (Expression (Parent (Formal))); | |
1624 | else | |
1625 | Ftyp := Etype (Iface_Formal); | |
1626 | Expr := Empty; | |
1627 | end if; | |
1628 | ||
725a69d2 | 1629 | Append_To (Formals, |
1630 | Make_Parameter_Specification (Loc, | |
1631 | Defining_Identifier => | |
1632 | Make_Defining_Identifier (Sloc (Formal), | |
1633 | Chars => Chars (Formal)), | |
1634 | In_Present => In_Present (Parent (Formal)), | |
1635 | Out_Present => Out_Present (Parent (Formal)), | |
04c6d723 | 1636 | Parameter_Type => New_Reference_To (Ftyp, Loc), |
1637 | Expression => Expr)); | |
1638 | ||
1639 | if not Is_Predefined_Dispatching_Operation (Prim) then | |
1640 | Next_Formal (Iface_Formal); | |
1641 | end if; | |
d62940bf | 1642 | |
aad6babd | 1643 | Next_Formal (Formal); |
1644 | end loop; | |
1645 | ||
17e14451 | 1646 | Controlling_Typ := Find_Dispatching_Type (Target); |
aad6babd | 1647 | |
725a69d2 | 1648 | Target_Formal := First_Formal (Target); |
1649 | Formal := First (Formals); | |
1650 | while Present (Formal) loop | |
04c6d723 | 1651 | |
6cd460aa | 1652 | -- If the parent is a constrained discriminated type, then the |
1653 | -- primitive operation will have been defined on a first subtype. | |
1654 | -- For proper matching with controlling type, use base type. | |
04c6d723 | 1655 | |
1656 | if Ekind (Target_Formal) = E_In_Parameter | |
1657 | and then Ekind (Etype (Target_Formal)) = E_Anonymous_Access_Type | |
1658 | then | |
6cd460aa | 1659 | Ftyp := |
1660 | Base_Type (Directly_Designated_Type (Etype (Target_Formal))); | |
04c6d723 | 1661 | else |
ca12fde2 | 1662 | Ftyp := Base_Type (Etype (Target_Formal)); |
04c6d723 | 1663 | end if; |
1664 | ||
232a63ed | 1665 | -- For concurrent types, the relevant information is found in the |
1666 | -- Corresponding_Record_Type, rather than the type entity itself. | |
6cd460aa | 1667 | |
04c6d723 | 1668 | if Is_Concurrent_Type (Ftyp) then |
1669 | Ftyp := Corresponding_Record_Type (Ftyp); | |
1670 | end if; | |
1671 | ||
725a69d2 | 1672 | if Ekind (Target_Formal) = E_In_Parameter |
1673 | and then Ekind (Etype (Target_Formal)) = E_Anonymous_Access_Type | |
04c6d723 | 1674 | and then Ftyp = Controlling_Typ |
725a69d2 | 1675 | then |
1676 | -- Generate: | |
17e14451 | 1677 | -- type T is access all <<type of the target formal>> |
1678 | -- S : Storage_Offset := Storage_Offset!(Formal) | |
1679 | -- - Offset_To_Top (address!(Formal)) | |
725a69d2 | 1680 | |
1681 | Decl_2 := | |
1682 | Make_Full_Type_Declaration (Loc, | |
ec97ce79 | 1683 | Defining_Identifier => Make_Temporary (Loc, 'T'), |
725a69d2 | 1684 | Type_Definition => |
1685 | Make_Access_To_Object_Definition (Loc, | |
1686 | All_Present => True, | |
1687 | Null_Exclusion_Present => False, | |
1688 | Constant_Present => False, | |
1689 | Subtype_Indication => | |
04c6d723 | 1690 | New_Reference_To (Ftyp, Loc))); |
725a69d2 | 1691 | |
cc60bd16 | 1692 | New_Arg := |
1693 | Unchecked_Convert_To (RTE (RE_Address), | |
1694 | New_Reference_To (Defining_Identifier (Formal), Loc)); | |
1695 | ||
1696 | if not RTE_Available (RE_Offset_To_Top) then | |
1697 | Offset_To_Top := | |
1698 | Build_Offset_To_Top (Loc, New_Arg); | |
1699 | else | |
1700 | Offset_To_Top := | |
1701 | Make_Function_Call (Loc, | |
1702 | Name => New_Reference_To (RTE (RE_Offset_To_Top), Loc), | |
1703 | Parameter_Associations => New_List (New_Arg)); | |
1704 | end if; | |
1705 | ||
725a69d2 | 1706 | Decl_1 := |
1707 | Make_Object_Declaration (Loc, | |
ec97ce79 | 1708 | Defining_Identifier => Make_Temporary (Loc, 'S'), |
725a69d2 | 1709 | Constant_Present => True, |
1710 | Object_Definition => | |
1711 | New_Reference_To (RTE (RE_Storage_Offset), Loc), | |
1712 | Expression => | |
1713 | Make_Op_Subtract (Loc, | |
1714 | Left_Opnd => | |
1715 | Unchecked_Convert_To | |
1716 | (RTE (RE_Storage_Offset), | |
1717 | New_Reference_To (Defining_Identifier (Formal), Loc)), | |
1718 | Right_Opnd => | |
cc60bd16 | 1719 | Offset_To_Top)); |
725a69d2 | 1720 | |
1721 | Append_To (Decl, Decl_2); | |
1722 | Append_To (Decl, Decl_1); | |
1723 | ||
17e14451 | 1724 | -- Reference the new actual. Generate: |
1725 | -- T!(S) | |
725a69d2 | 1726 | |
1727 | Append_To (Actuals, | |
1728 | Unchecked_Convert_To | |
1729 | (Defining_Identifier (Decl_2), | |
1730 | New_Reference_To (Defining_Identifier (Decl_1), Loc))); | |
1731 | ||
04c6d723 | 1732 | elsif Ftyp = Controlling_Typ then |
aad6babd | 1733 | |
e8376947 | 1734 | -- Generate: |
17e14451 | 1735 | -- S1 : Storage_Offset := Storage_Offset!(Formal'Address) |
1736 | -- - Offset_To_Top (Formal'Address) | |
1737 | -- S2 : Addr_Ptr := Addr_Ptr!(S1) | |
aad6babd | 1738 | |
cc60bd16 | 1739 | New_Arg := |
1740 | Make_Attribute_Reference (Loc, | |
1741 | Prefix => | |
1742 | New_Reference_To (Defining_Identifier (Formal), Loc), | |
1743 | Attribute_Name => | |
1744 | Name_Address); | |
1745 | ||
1746 | if not RTE_Available (RE_Offset_To_Top) then | |
1747 | Offset_To_Top := | |
1748 | Build_Offset_To_Top (Loc, New_Arg); | |
1749 | else | |
1750 | Offset_To_Top := | |
1751 | Make_Function_Call (Loc, | |
1752 | Name => New_Reference_To (RTE (RE_Offset_To_Top), Loc), | |
1753 | Parameter_Associations => New_List (New_Arg)); | |
1754 | end if; | |
1755 | ||
725a69d2 | 1756 | Decl_1 := |
1757 | Make_Object_Declaration (Loc, | |
ec97ce79 | 1758 | Defining_Identifier => Make_Temporary (Loc, 'S'), |
725a69d2 | 1759 | Constant_Present => True, |
1760 | Object_Definition => | |
1761 | New_Reference_To (RTE (RE_Storage_Offset), Loc), | |
1762 | Expression => | |
1763 | Make_Op_Subtract (Loc, | |
1764 | Left_Opnd => | |
1765 | Unchecked_Convert_To | |
1766 | (RTE (RE_Storage_Offset), | |
1767 | Make_Attribute_Reference (Loc, | |
1768 | Prefix => | |
1769 | New_Reference_To | |
1770 | (Defining_Identifier (Formal), Loc), | |
1771 | Attribute_Name => Name_Address)), | |
1772 | Right_Opnd => | |
cc60bd16 | 1773 | Offset_To_Top)); |
aad6babd | 1774 | |
725a69d2 | 1775 | Decl_2 := |
1776 | Make_Object_Declaration (Loc, | |
ec97ce79 | 1777 | Defining_Identifier => Make_Temporary (Loc, 'S'), |
1778 | Constant_Present => True, | |
1779 | Object_Definition => | |
1780 | New_Reference_To (RTE (RE_Addr_Ptr), Loc), | |
1781 | Expression => | |
725a69d2 | 1782 | Unchecked_Convert_To |
1783 | (RTE (RE_Addr_Ptr), | |
1784 | New_Reference_To (Defining_Identifier (Decl_1), Loc))); | |
aad6babd | 1785 | |
725a69d2 | 1786 | Append_To (Decl, Decl_1); |
1787 | Append_To (Decl, Decl_2); | |
952af0b9 | 1788 | |
ec97ce79 | 1789 | -- Reference the new actual, generate: |
17e14451 | 1790 | -- Target_Formal (S2.all) |
aad6babd | 1791 | |
725a69d2 | 1792 | Append_To (Actuals, |
04c6d723 | 1793 | Unchecked_Convert_To (Ftyp, |
725a69d2 | 1794 | Make_Explicit_Dereference (Loc, |
1795 | New_Reference_To (Defining_Identifier (Decl_2), Loc)))); | |
aad6babd | 1796 | |
725a69d2 | 1797 | -- No special management required for this actual |
aad6babd | 1798 | |
725a69d2 | 1799 | else |
1800 | Append_To (Actuals, | |
1801 | New_Reference_To (Defining_Identifier (Formal), Loc)); | |
1802 | end if; | |
1803 | ||
1804 | Next_Formal (Target_Formal); | |
aad6babd | 1805 | Next (Formal); |
1806 | end loop; | |
1807 | ||
ec97ce79 | 1808 | Thunk_Id := Make_Temporary (Loc, 'T'); |
e7e688dd | 1809 | Set_Is_Thunk (Thunk_Id); |
1810 | ||
e8376947 | 1811 | -- Procedure case |
1812 | ||
d62940bf | 1813 | if Ekind (Target) = E_Procedure then |
725a69d2 | 1814 | Thunk_Code := |
aad6babd | 1815 | Make_Subprogram_Body (Loc, |
1816 | Specification => | |
1817 | Make_Procedure_Specification (Loc, | |
1818 | Defining_Unit_Name => Thunk_Id, | |
1819 | Parameter_Specifications => Formals), | |
1820 | Declarations => Decl, | |
1821 | Handled_Statement_Sequence => | |
1822 | Make_Handled_Sequence_Of_Statements (Loc, | |
1823 | Statements => New_List ( | |
1824 | Make_Procedure_Call_Statement (Loc, | |
725a69d2 | 1825 | Name => New_Occurrence_Of (Target, Loc), |
1826 | Parameter_Associations => Actuals)))); | |
aad6babd | 1827 | |
e8376947 | 1828 | -- Function case |
aad6babd | 1829 | |
e8376947 | 1830 | else pragma Assert (Ekind (Target) = E_Function); |
725a69d2 | 1831 | Thunk_Code := |
aad6babd | 1832 | Make_Subprogram_Body (Loc, |
1833 | Specification => | |
1834 | Make_Function_Specification (Loc, | |
1835 | Defining_Unit_Name => Thunk_Id, | |
1836 | Parameter_Specifications => Formals, | |
d62940bf | 1837 | Result_Definition => |
1838 | New_Copy (Result_Definition (Parent (Target)))), | |
aad6babd | 1839 | Declarations => Decl, |
1840 | Handled_Statement_Sequence => | |
1841 | Make_Handled_Sequence_Of_Statements (Loc, | |
1842 | Statements => New_List ( | |
17e14451 | 1843 | Make_Simple_Return_Statement (Loc, |
aad6babd | 1844 | Make_Function_Call (Loc, |
1845 | Name => New_Occurrence_Of (Target, Loc), | |
1846 | Parameter_Associations => Actuals))))); | |
1847 | end if; | |
aad6babd | 1848 | end Expand_Interface_Thunk; |
1849 | ||
d00681a7 | 1850 | -------------------------- |
1851 | -- Has_CPP_Constructors -- | |
1852 | -------------------------- | |
1853 | ||
1854 | function Has_CPP_Constructors (Typ : Entity_Id) return Boolean is | |
1855 | E : Entity_Id; | |
1856 | ||
1857 | begin | |
1858 | -- Look for the constructor entities | |
1859 | ||
1860 | E := Next_Entity (Typ); | |
1861 | while Present (E) loop | |
1862 | if Ekind (E) = E_Function | |
1863 | and then Is_Constructor (E) | |
1864 | then | |
1865 | return True; | |
1866 | end if; | |
1867 | ||
1868 | Next_Entity (E); | |
1869 | end loop; | |
1870 | ||
1871 | return False; | |
1872 | end Has_CPP_Constructors; | |
1873 | ||
24971415 | 1874 | ------------ |
1875 | -- Has_DT -- | |
1876 | ------------ | |
1877 | ||
1878 | function Has_DT (Typ : Entity_Id) return Boolean is | |
1879 | begin | |
1880 | return not Is_Interface (Typ) | |
1881 | and then not Restriction_Active (No_Dispatching_Calls); | |
1882 | end Has_DT; | |
1883 | ||
a652dd51 | 1884 | ----------------------------------------- |
1885 | -- Is_Predefined_Dispatching_Operation -- | |
1886 | ----------------------------------------- | |
1887 | ||
1888 | function Is_Predefined_Dispatching_Operation | |
1889 | (E : Entity_Id) return Boolean | |
1890 | is | |
1891 | TSS_Name : TSS_Name_Type; | |
1892 | ||
1893 | begin | |
1894 | if not Is_Dispatching_Operation (E) then | |
1895 | return False; | |
1896 | end if; | |
1897 | ||
1898 | Get_Name_String (Chars (E)); | |
1899 | ||
1900 | -- Most predefined primitives have internally generated names. Equality | |
1901 | -- must be treated differently; the predefined operation is recognized | |
1902 | -- as a homogeneous binary operator that returns Boolean. | |
1903 | ||
1904 | if Name_Len > TSS_Name_Type'Last then | |
1905 | TSS_Name := TSS_Name_Type (Name_Buffer (Name_Len - TSS_Name'Length + 1 | |
1906 | .. Name_Len)); | |
1907 | if Chars (E) = Name_uSize | |
1908 | or else Chars (E) = Name_uAlignment | |
1909 | or else TSS_Name = TSS_Stream_Read | |
1910 | or else TSS_Name = TSS_Stream_Write | |
1911 | or else TSS_Name = TSS_Stream_Input | |
1912 | or else TSS_Name = TSS_Stream_Output | |
1913 | or else | |
1914 | (Chars (E) = Name_Op_Eq | |
30592778 | 1915 | and then Etype (First_Formal (E)) = Etype (Last_Formal (E))) |
a652dd51 | 1916 | or else Chars (E) = Name_uAssign |
1917 | or else TSS_Name = TSS_Deep_Adjust | |
1918 | or else TSS_Name = TSS_Deep_Finalize | |
1919 | or else Is_Predefined_Interface_Primitive (E) | |
1920 | then | |
1921 | return True; | |
1922 | end if; | |
1923 | end if; | |
1924 | ||
1925 | return False; | |
1926 | end Is_Predefined_Dispatching_Operation; | |
1927 | ||
d1458a07 | 1928 | --------------------------------------- |
1929 | -- Is_Predefined_Internal_Operation -- | |
1930 | --------------------------------------- | |
1931 | ||
1932 | function Is_Predefined_Internal_Operation | |
1933 | (E : Entity_Id) return Boolean | |
1934 | is | |
1935 | TSS_Name : TSS_Name_Type; | |
1936 | ||
1937 | begin | |
1938 | if not Is_Dispatching_Operation (E) then | |
1939 | return False; | |
1940 | end if; | |
1941 | ||
1942 | Get_Name_String (Chars (E)); | |
1943 | ||
1944 | -- Most predefined primitives have internally generated names. Equality | |
1945 | -- must be treated differently; the predefined operation is recognized | |
1946 | -- as a homogeneous binary operator that returns Boolean. | |
1947 | ||
1948 | if Name_Len > TSS_Name_Type'Last then | |
1949 | TSS_Name := | |
1950 | TSS_Name_Type | |
1951 | (Name_Buffer (Name_Len - TSS_Name'Length + 1 .. Name_Len)); | |
1952 | ||
1953 | if Chars (E) = Name_uSize | |
1954 | or else Chars (E) = Name_uAlignment | |
1955 | or else | |
1956 | (Chars (E) = Name_Op_Eq | |
30592778 | 1957 | and then Etype (First_Formal (E)) = Etype (Last_Formal (E))) |
d1458a07 | 1958 | or else Chars (E) = Name_uAssign |
1959 | or else TSS_Name = TSS_Deep_Adjust | |
1960 | or else TSS_Name = TSS_Deep_Finalize | |
1961 | or else Is_Predefined_Interface_Primitive (E) | |
1962 | then | |
1963 | return True; | |
1964 | end if; | |
1965 | end if; | |
1966 | ||
1967 | return False; | |
1968 | end Is_Predefined_Internal_Operation; | |
1969 | ||
af647dc7 | 1970 | ------------------------------------- |
1971 | -- Is_Predefined_Dispatching_Alias -- | |
1972 | ------------------------------------- | |
1973 | ||
1974 | function Is_Predefined_Dispatching_Alias (Prim : Entity_Id) return Boolean | |
1975 | is | |
af647dc7 | 1976 | begin |
fc2907f6 | 1977 | return not Is_Predefined_Dispatching_Operation (Prim) |
af647dc7 | 1978 | and then Present (Alias (Prim)) |
fc2907f6 | 1979 | and then Is_Predefined_Dispatching_Operation (Ultimate_Alias (Prim)); |
af647dc7 | 1980 | end Is_Predefined_Dispatching_Alias; |
1981 | ||
a652dd51 | 1982 | --------------------------------------- |
1983 | -- Is_Predefined_Interface_Primitive -- | |
1984 | --------------------------------------- | |
1985 | ||
1986 | function Is_Predefined_Interface_Primitive (E : Entity_Id) return Boolean is | |
1987 | begin | |
de54c5ab | 1988 | return Ada_Version >= Ada_2005 |
a652dd51 | 1989 | and then (Chars (E) = Name_uDisp_Asynchronous_Select or else |
1990 | Chars (E) = Name_uDisp_Conditional_Select or else | |
1991 | Chars (E) = Name_uDisp_Get_Prim_Op_Kind or else | |
1992 | Chars (E) = Name_uDisp_Get_Task_Id or else | |
1993 | Chars (E) = Name_uDisp_Requeue or else | |
1994 | Chars (E) = Name_uDisp_Timed_Select); | |
1995 | end Is_Predefined_Interface_Primitive; | |
1996 | ||
76a1c25b | 1997 | ---------------------------------------- |
1998 | -- Make_Disp_Asynchronous_Select_Body -- | |
1999 | ---------------------------------------- | |
ee6ba406 | 2000 | |
cdb1c38f | 2001 | -- For interface types, generate: |
2002 | ||
2003 | -- procedure _Disp_Asynchronous_Select | |
2004 | -- (T : in out <Typ>; | |
2005 | -- S : Integer; | |
2006 | -- P : System.Address; | |
2007 | -- B : out System.Storage_Elements.Dummy_Communication_Block; | |
2008 | -- F : out Boolean) | |
2009 | -- is | |
2010 | -- begin | |
2011 | -- null; | |
2012 | -- end _Disp_Asynchronous_Select; | |
2013 | ||
2014 | -- For protected types, generate: | |
2015 | ||
2016 | -- procedure _Disp_Asynchronous_Select | |
2017 | -- (T : in out <Typ>; | |
2018 | -- S : Integer; | |
2019 | -- P : System.Address; | |
2020 | -- B : out System.Storage_Elements.Dummy_Communication_Block; | |
2021 | -- F : out Boolean) | |
2022 | -- is | |
2023 | -- I : Integer := | |
2024 | -- Ada.Tags.Get_Entry_Index (Ada.Tags.Tag (<Typ>VP, S)); | |
2025 | -- Bnn : System.Tasking.Protected_Objects.Operations. | |
2026 | -- Communication_Block; | |
2027 | -- begin | |
2028 | -- System.Tasking.Protected_Objects.Operations.Protected_Entry_Call | |
2029 | -- (T._object'Access, | |
2030 | -- System.Tasking.Protected_Objects.Protected_Entry_Index (I), | |
2031 | -- P, | |
2032 | -- System.Tasking.Asynchronous_Call, | |
2033 | -- Bnn); | |
2034 | -- B := System.Storage_Elements.Dummy_Communication_Block (Bnn); | |
2035 | -- end _Disp_Asynchronous_Select; | |
2036 | ||
2037 | -- For task types, generate: | |
2038 | ||
2039 | -- procedure _Disp_Asynchronous_Select | |
2040 | -- (T : in out <Typ>; | |
2041 | -- S : Integer; | |
2042 | -- P : System.Address; | |
2043 | -- B : out System.Storage_Elements.Dummy_Communication_Block; | |
2044 | -- F : out Boolean) | |
2045 | -- is | |
2046 | -- I : Integer := | |
2047 | -- Ada.Tags.Get_Entry_Index (Ada.Tags.Tag (<Typ>VP, S)); | |
2048 | -- begin | |
2049 | -- System.Tasking.Rendezvous.Task_Entry_Call | |
2050 | -- (T._task_id, | |
2051 | -- System.Tasking.Task_Entry_Index (I), | |
2052 | -- P, | |
2053 | -- System.Tasking.Asynchronous_Call, | |
2054 | -- F); | |
2055 | -- end _Disp_Asynchronous_Select; | |
2056 | ||
76a1c25b | 2057 | function Make_Disp_Asynchronous_Select_Body |
2058 | (Typ : Entity_Id) return Node_Id | |
2059 | is | |
725a69d2 | 2060 | Com_Block : Entity_Id; |
2061 | Conc_Typ : Entity_Id := Empty; | |
2062 | Decls : constant List_Id := New_List; | |
2063 | DT_Ptr : Entity_Id; | |
2064 | Loc : constant Source_Ptr := Sloc (Typ); | |
acf97c11 | 2065 | Obj_Ref : Node_Id; |
725a69d2 | 2066 | Stmts : constant List_Id := New_List; |
ee6ba406 | 2067 | |
2068 | begin | |
68f95949 | 2069 | pragma Assert (not Restriction_Active (No_Dispatching_Calls)); |
2070 | ||
952af0b9 | 2071 | -- Null body is generated for interface types |
2072 | ||
76a1c25b | 2073 | if Is_Interface (Typ) then |
2074 | return | |
2075 | Make_Subprogram_Body (Loc, | |
2076 | Specification => | |
2077 | Make_Disp_Asynchronous_Select_Spec (Typ), | |
2078 | Declarations => | |
2079 | New_List, | |
2080 | Handled_Statement_Sequence => | |
2081 | Make_Handled_Sequence_Of_Statements (Loc, | |
2082 | New_List (Make_Null_Statement (Loc)))); | |
9dfe12ae | 2083 | end if; |
2084 | ||
76a1c25b | 2085 | DT_Ptr := Node (First_Elmt (Access_Disp_Table (Typ))); |
aad6babd | 2086 | |
952af0b9 | 2087 | if Is_Concurrent_Record_Type (Typ) then |
2088 | Conc_Typ := Corresponding_Concurrent_Type (Typ); | |
aad6babd | 2089 | |
76a1c25b | 2090 | -- Generate: |
cdb1c38f | 2091 | -- I : Integer := |
2092 | -- Ada.Tags.Get_Entry_Index (Ada.Tags.Tag! (<type>VP), S); | |
aad6babd | 2093 | |
76a1c25b | 2094 | -- where I will be used to capture the entry index of the primitive |
2095 | -- wrapper at position S. | |
aad6babd | 2096 | |
76a1c25b | 2097 | Append_To (Decls, |
2098 | Make_Object_Declaration (Loc, | |
2099 | Defining_Identifier => | |
2100 | Make_Defining_Identifier (Loc, Name_uI), | |
2101 | Object_Definition => | |
2102 | New_Reference_To (Standard_Integer, Loc), | |
2103 | Expression => | |
725a69d2 | 2104 | Make_Function_Call (Loc, |
cdb1c38f | 2105 | Name => |
2106 | New_Reference_To (RTE (RE_Get_Entry_Index), Loc), | |
2107 | Parameter_Associations => | |
2108 | New_List ( | |
2109 | Unchecked_Convert_To (RTE (RE_Tag), | |
2110 | New_Reference_To (DT_Ptr, Loc)), | |
2111 | Make_Identifier (Loc, Name_uS))))); | |
aad6babd | 2112 | |
76a1c25b | 2113 | if Ekind (Conc_Typ) = E_Protected_Type then |
aad6babd | 2114 | |
725a69d2 | 2115 | -- Generate: |
cdb1c38f | 2116 | -- Bnn : Communication_Block; |
725a69d2 | 2117 | |
ec97ce79 | 2118 | Com_Block := Make_Temporary (Loc, 'B'); |
725a69d2 | 2119 | Append_To (Decls, |
2120 | Make_Object_Declaration (Loc, | |
2121 | Defining_Identifier => | |
2122 | Com_Block, | |
2123 | Object_Definition => | |
2124 | New_Reference_To (RTE (RE_Communication_Block), Loc))); | |
2125 | ||
acf97c11 | 2126 | -- Build T._object'Access for calls below |
aad6babd | 2127 | |
acf97c11 | 2128 | Obj_Ref := |
2129 | Make_Attribute_Reference (Loc, | |
2130 | Attribute_Name => Name_Unchecked_Access, | |
2131 | Prefix => | |
2132 | Make_Selected_Component (Loc, | |
2133 | Prefix => Make_Identifier (Loc, Name_uT), | |
2134 | Selector_Name => Make_Identifier (Loc, Name_uObject))); | |
aad6babd | 2135 | |
acf97c11 | 2136 | case Corresponding_Runtime_Package (Conc_Typ) is |
2137 | when System_Tasking_Protected_Objects_Entries => | |
aad6babd | 2138 | |
acf97c11 | 2139 | -- Generate: |
2140 | -- Protected_Entry_Call | |
2141 | -- (T._object'Access, -- Object | |
2142 | -- Protected_Entry_Index! (I), -- E | |
2143 | -- P, -- Uninterpreted_Data | |
2144 | -- Asynchronous_Call, -- Mode | |
2145 | -- Bnn); -- Communication_Block | |
2146 | ||
2147 | -- where T is the protected object, I is the entry index, P | |
2148 | -- is the wrapped parameters and B is the name of the | |
2149 | -- communication block. | |
2150 | ||
2151 | Append_To (Stmts, | |
2152 | Make_Procedure_Call_Statement (Loc, | |
2153 | Name => | |
2154 | New_Reference_To (RTE (RE_Protected_Entry_Call), Loc), | |
2155 | Parameter_Associations => | |
2156 | New_List ( | |
2157 | Obj_Ref, | |
aad6babd | 2158 | |
acf97c11 | 2159 | Make_Unchecked_Type_Conversion (Loc, -- entry index |
2160 | Subtype_Mark => | |
2161 | New_Reference_To | |
55868293 | 2162 | (RTE (RE_Protected_Entry_Index), Loc), |
acf97c11 | 2163 | Expression => Make_Identifier (Loc, Name_uI)), |
d62940bf | 2164 | |
acf97c11 | 2165 | Make_Identifier (Loc, Name_uP), -- parameter block |
55868293 | 2166 | New_Reference_To -- Asynchronous_Call |
2167 | (RTE (RE_Asynchronous_Call), Loc), | |
acf97c11 | 2168 | |
2169 | New_Reference_To (Com_Block, Loc)))); -- comm block | |
2170 | ||
2171 | when System_Tasking_Protected_Objects_Single_Entry => | |
2172 | ||
2173 | -- Generate: | |
2174 | -- procedure Protected_Single_Entry_Call | |
2175 | -- (Object : Protection_Entry_Access; | |
2176 | -- Uninterpreted_Data : System.Address; | |
2177 | -- Mode : Call_Modes); | |
725a69d2 | 2178 | |
acf97c11 | 2179 | Append_To (Stmts, |
2180 | Make_Procedure_Call_Statement (Loc, | |
2181 | Name => | |
2182 | New_Reference_To | |
2183 | (RTE (RE_Protected_Single_Entry_Call), Loc), | |
2184 | Parameter_Associations => | |
2185 | New_List ( | |
2186 | Obj_Ref, | |
2187 | ||
2188 | Make_Attribute_Reference (Loc, | |
55868293 | 2189 | Prefix => Make_Identifier (Loc, Name_uP), |
acf97c11 | 2190 | Attribute_Name => Name_Address), |
2191 | ||
2192 | New_Reference_To | |
2193 | (RTE (RE_Asynchronous_Call), Loc)))); | |
2194 | ||
2195 | when others => | |
2196 | raise Program_Error; | |
2197 | end case; | |
725a69d2 | 2198 | |
2199 | -- Generate: | |
cdb1c38f | 2200 | -- B := Dummy_Communication_Block (Bnn); |
725a69d2 | 2201 | |
2202 | Append_To (Stmts, | |
2203 | Make_Assignment_Statement (Loc, | |
55868293 | 2204 | Name => Make_Identifier (Loc, Name_uB), |
725a69d2 | 2205 | Expression => |
2206 | Make_Unchecked_Type_Conversion (Loc, | |
2207 | Subtype_Mark => | |
2208 | New_Reference_To ( | |
2209 | RTE (RE_Dummy_Communication_Block), Loc), | |
2210 | Expression => | |
2211 | New_Reference_To (Com_Block, Loc)))); | |
2212 | ||
76a1c25b | 2213 | else |
2214 | pragma Assert (Ekind (Conc_Typ) = E_Task_Type); | |
d62940bf | 2215 | |
76a1c25b | 2216 | -- Generate: |
cdb1c38f | 2217 | -- Task_Entry_Call |
2218 | -- (T._task_id, -- Acceptor | |
2219 | -- Task_Entry_Index! (I), -- E | |
2220 | -- P, -- Uninterpreted_Data | |
2221 | -- Asynchronous_Call, -- Mode | |
2222 | -- F); -- Rendezvous_Successful | |
ee6ba406 | 2223 | |
acf97c11 | 2224 | -- where T is the task object, I is the entry index, P is the |
76a1c25b | 2225 | -- wrapped parameters and F is the status flag. |
ee6ba406 | 2226 | |
76a1c25b | 2227 | Append_To (Stmts, |
2228 | Make_Procedure_Call_Statement (Loc, | |
2229 | Name => | |
2230 | New_Reference_To (RTE (RE_Task_Entry_Call), Loc), | |
2231 | Parameter_Associations => | |
2232 | New_List ( | |
76a1c25b | 2233 | Make_Selected_Component (Loc, -- T._task_id |
55868293 | 2234 | Prefix => Make_Identifier (Loc, Name_uT), |
2235 | Selector_Name => Make_Identifier (Loc, Name_uTask_Id)), | |
ee6ba406 | 2236 | |
76a1c25b | 2237 | Make_Unchecked_Type_Conversion (Loc, -- entry index |
2238 | Subtype_Mark => | |
2239 | New_Reference_To (RTE (RE_Task_Entry_Index), Loc), | |
55868293 | 2240 | Expression => Make_Identifier (Loc, Name_uI)), |
ee6ba406 | 2241 | |
76a1c25b | 2242 | Make_Identifier (Loc, Name_uP), -- parameter block |
55868293 | 2243 | New_Reference_To -- Asynchronous_Call |
2244 | (RTE (RE_Asynchronous_Call), Loc), | |
76a1c25b | 2245 | Make_Identifier (Loc, Name_uF)))); -- status flag |
2246 | end if; | |
7c949aad | 2247 | |
2248 | else | |
2249 | -- Ensure that the statements list is non-empty | |
2250 | ||
2251 | Append_To (Stmts, Make_Null_Statement (Loc)); | |
76a1c25b | 2252 | end if; |
ee6ba406 | 2253 | |
76a1c25b | 2254 | return |
2255 | Make_Subprogram_Body (Loc, | |
2256 | Specification => | |
2257 | Make_Disp_Asynchronous_Select_Spec (Typ), | |
2258 | Declarations => | |
2259 | Decls, | |
2260 | Handled_Statement_Sequence => | |
2261 | Make_Handled_Sequence_Of_Statements (Loc, Stmts)); | |
2262 | end Make_Disp_Asynchronous_Select_Body; | |
ee6ba406 | 2263 | |
76a1c25b | 2264 | ---------------------------------------- |
2265 | -- Make_Disp_Asynchronous_Select_Spec -- | |
2266 | ---------------------------------------- | |
ee6ba406 | 2267 | |
76a1c25b | 2268 | function Make_Disp_Asynchronous_Select_Spec |
2269 | (Typ : Entity_Id) return Node_Id | |
2270 | is | |
2271 | Loc : constant Source_Ptr := Sloc (Typ); | |
2272 | Def_Id : constant Node_Id := | |
2273 | Make_Defining_Identifier (Loc, | |
2274 | Name_uDisp_Asynchronous_Select); | |
2275 | Params : constant List_Id := New_List; | |
ee6ba406 | 2276 | |
76a1c25b | 2277 | begin |
68f95949 | 2278 | pragma Assert (not Restriction_Active (No_Dispatching_Calls)); |
2279 | ||
725a69d2 | 2280 | -- T : in out Typ; -- Object parameter |
2281 | -- S : Integer; -- Primitive operation slot | |
2282 | -- P : Address; -- Wrapped parameters | |
2283 | -- B : out Dummy_Communication_Block; -- Communication block dummy | |
2284 | -- F : out Boolean; -- Status flag | |
ee6ba406 | 2285 | |
725a69d2 | 2286 | Append_List_To (Params, New_List ( |
2287 | ||
2288 | Make_Parameter_Specification (Loc, | |
2289 | Defining_Identifier => | |
2290 | Make_Defining_Identifier (Loc, Name_uT), | |
2291 | Parameter_Type => | |
2292 | New_Reference_To (Typ, Loc), | |
2293 | In_Present => True, | |
2294 | Out_Present => True), | |
2295 | ||
2296 | Make_Parameter_Specification (Loc, | |
2297 | Defining_Identifier => | |
2298 | Make_Defining_Identifier (Loc, Name_uS), | |
2299 | Parameter_Type => | |
2300 | New_Reference_To (Standard_Integer, Loc)), | |
2301 | ||
2302 | Make_Parameter_Specification (Loc, | |
2303 | Defining_Identifier => | |
2304 | Make_Defining_Identifier (Loc, Name_uP), | |
2305 | Parameter_Type => | |
2306 | New_Reference_To (RTE (RE_Address), Loc)), | |
2307 | ||
2308 | Make_Parameter_Specification (Loc, | |
2309 | Defining_Identifier => | |
2310 | Make_Defining_Identifier (Loc, Name_uB), | |
2311 | Parameter_Type => | |
2312 | New_Reference_To (RTE (RE_Dummy_Communication_Block), Loc), | |
2313 | Out_Present => True), | |
ee6ba406 | 2314 | |
725a69d2 | 2315 | Make_Parameter_Specification (Loc, |
2316 | Defining_Identifier => | |
2317 | Make_Defining_Identifier (Loc, Name_uF), | |
2318 | Parameter_Type => | |
2319 | New_Reference_To (Standard_Boolean, Loc), | |
2320 | Out_Present => True))); | |
7189d17f | 2321 | |
76a1c25b | 2322 | return |
725a69d2 | 2323 | Make_Procedure_Specification (Loc, |
2324 | Defining_Unit_Name => Def_Id, | |
2325 | Parameter_Specifications => Params); | |
76a1c25b | 2326 | end Make_Disp_Asynchronous_Select_Spec; |
ee6ba406 | 2327 | |
76a1c25b | 2328 | --------------------------------------- |
2329 | -- Make_Disp_Conditional_Select_Body -- | |
2330 | --------------------------------------- | |
ee6ba406 | 2331 | |
cdb1c38f | 2332 | -- For interface types, generate: |
2333 | ||
2334 | -- procedure _Disp_Conditional_Select | |
2335 | -- (T : in out <Typ>; | |
2336 | -- S : Integer; | |
2337 | -- P : System.Address; | |
2338 | -- C : out Ada.Tags.Prim_Op_Kind; | |
2339 | -- F : out Boolean) | |
2340 | -- is | |
2341 | -- begin | |
2342 | -- null; | |
2343 | -- end _Disp_Conditional_Select; | |
2344 | ||
2345 | -- For protected types, generate: | |
2346 | ||
2347 | -- procedure _Disp_Conditional_Select | |
2348 | -- (T : in out <Typ>; | |
2349 | -- S : Integer; | |
2350 | -- P : System.Address; | |
2351 | -- C : out Ada.Tags.Prim_Op_Kind; | |
2352 | -- F : out Boolean) | |
2353 | -- is | |
2354 | -- I : Integer; | |
2355 | -- Bnn : System.Tasking.Protected_Objects.Operations. | |
2356 | -- Communication_Block; | |
2357 | ||
2358 | -- begin | |
2359 | -- C := Ada.Tags.Get_Prim_Op_Kind (Ada.Tags.Tag (<Typ>VP, S)); | |
2360 | ||
2361 | -- if C = Ada.Tags.POK_Procedure | |
2362 | -- or else C = Ada.Tags.POK_Protected_Procedure | |
2363 | -- or else C = Ada.Tags.POK_Task_Procedure | |
2364 | -- then | |
2365 | -- F := True; | |
2366 | -- return; | |
2367 | -- end if; | |
2368 | ||
2369 | -- I := Ada.Tags.Get_Entry_Index (Ada.Tags.Tag (<Typ>VP, S)); | |
2370 | -- System.Tasking.Protected_Objects.Operations.Protected_Entry_Call | |
2371 | -- (T.object'Access, | |
2372 | -- System.Tasking.Protected_Objects.Protected_Entry_Index (I), | |
2373 | -- P, | |
2374 | -- System.Tasking.Conditional_Call, | |
2375 | -- Bnn); | |
2376 | -- F := not Cancelled (Bnn); | |
2377 | -- end _Disp_Conditional_Select; | |
2378 | ||
2379 | -- For task types, generate: | |
2380 | ||
2381 | -- procedure _Disp_Conditional_Select | |
2382 | -- (T : in out <Typ>; | |
2383 | -- S : Integer; | |
2384 | -- P : System.Address; | |
2385 | -- C : out Ada.Tags.Prim_Op_Kind; | |
2386 | -- F : out Boolean) | |
2387 | -- is | |
2388 | -- I : Integer; | |
2389 | ||
2390 | -- begin | |
2391 | -- I := Ada.Tags.Get_Entry_Index (Ada.Tags.Tag (<Typ>VP, S)); | |
2392 | -- System.Tasking.Rendezvous.Task_Entry_Call | |
2393 | -- (T._task_id, | |
2394 | -- System.Tasking.Task_Entry_Index (I), | |
2395 | -- P, | |
2396 | -- System.Tasking.Conditional_Call, | |
2397 | -- F); | |
2398 | -- end _Disp_Conditional_Select; | |
2399 | ||
76a1c25b | 2400 | function Make_Disp_Conditional_Select_Body |
2401 | (Typ : Entity_Id) return Node_Id | |
2402 | is | |
2403 | Loc : constant Source_Ptr := Sloc (Typ); | |
2404 | Blk_Nam : Entity_Id; | |
2405 | Conc_Typ : Entity_Id := Empty; | |
2406 | Decls : constant List_Id := New_List; | |
2407 | DT_Ptr : Entity_Id; | |
acf97c11 | 2408 | Obj_Ref : Node_Id; |
76a1c25b | 2409 | Stmts : constant List_Id := New_List; |
ee6ba406 | 2410 | |
76a1c25b | 2411 | begin |
68f95949 | 2412 | pragma Assert (not Restriction_Active (No_Dispatching_Calls)); |
2413 | ||
952af0b9 | 2414 | -- Null body is generated for interface types |
2415 | ||
76a1c25b | 2416 | if Is_Interface (Typ) then |
2417 | return | |
2418 | Make_Subprogram_Body (Loc, | |
2419 | Specification => | |
2420 | Make_Disp_Conditional_Select_Spec (Typ), | |
2421 | Declarations => | |
2422 | No_List, | |
2423 | Handled_Statement_Sequence => | |
2424 | Make_Handled_Sequence_Of_Statements (Loc, | |
2425 | New_List (Make_Null_Statement (Loc)))); | |
2426 | end if; | |
ee6ba406 | 2427 | |
76a1c25b | 2428 | DT_Ptr := Node (First_Elmt (Access_Disp_Table (Typ))); |
ee6ba406 | 2429 | |
952af0b9 | 2430 | if Is_Concurrent_Record_Type (Typ) then |
2431 | Conc_Typ := Corresponding_Concurrent_Type (Typ); | |
ee6ba406 | 2432 | |
76a1c25b | 2433 | -- Generate: |
2434 | -- I : Integer; | |
ee6ba406 | 2435 | |
76a1c25b | 2436 | -- where I will be used to capture the entry index of the primitive |
2437 | -- wrapper at position S. | |
ee6ba406 | 2438 | |
76a1c25b | 2439 | Append_To (Decls, |
2440 | Make_Object_Declaration (Loc, | |
2441 | Defining_Identifier => | |
2442 | Make_Defining_Identifier (Loc, Name_uI), | |
2443 | Object_Definition => | |
2444 | New_Reference_To (Standard_Integer, Loc))); | |
ee6ba406 | 2445 | |
952af0b9 | 2446 | -- Generate: |
cdb1c38f | 2447 | -- C := Ada.Tags.Get_Prim_Op_Kind (Ada.Tags.Tag! (<type>VP), S); |
ee6ba406 | 2448 | |
952af0b9 | 2449 | -- if C = POK_Procedure |
2450 | -- or else C = POK_Protected_Procedure | |
2451 | -- or else C = POK_Task_Procedure; | |
2452 | -- then | |
2453 | -- F := True; | |
2454 | -- return; | |
2455 | -- end if; | |
aad6babd | 2456 | |
725a69d2 | 2457 | Build_Common_Dispatching_Select_Statements (Loc, DT_Ptr, Stmts); |
aad6babd | 2458 | |
76a1c25b | 2459 | -- Generate: |
2460 | -- Bnn : Communication_Block; | |
aad6babd | 2461 | |
cdb1c38f | 2462 | -- where Bnn is the name of the communication block used in the |
2463 | -- call to Protected_Entry_Call. | |
aad6babd | 2464 | |
ec97ce79 | 2465 | Blk_Nam := Make_Temporary (Loc, 'B'); |
76a1c25b | 2466 | Append_To (Decls, |
2467 | Make_Object_Declaration (Loc, | |
2468 | Defining_Identifier => | |
2469 | Blk_Nam, | |
2470 | Object_Definition => | |
2471 | New_Reference_To (RTE (RE_Communication_Block), Loc))); | |
aad6babd | 2472 | |
76a1c25b | 2473 | -- Generate: |
cdb1c38f | 2474 | -- I := Ada.Tags.Get_Entry_Index (Ada.Tags.Tag! (<type>VP), S); |
aad6babd | 2475 | |
76a1c25b | 2476 | -- I is the entry index and S is the dispatch table slot |
aad6babd | 2477 | |
76a1c25b | 2478 | Append_To (Stmts, |
2479 | Make_Assignment_Statement (Loc, | |
55868293 | 2480 | Name => Make_Identifier (Loc, Name_uI), |
76a1c25b | 2481 | Expression => |
725a69d2 | 2482 | Make_Function_Call (Loc, |
cdb1c38f | 2483 | Name => |
2484 | New_Reference_To (RTE (RE_Get_Entry_Index), Loc), | |
2485 | Parameter_Associations => | |
2486 | New_List ( | |
2487 | Unchecked_Convert_To (RTE (RE_Tag), | |
2488 | New_Reference_To (DT_Ptr, Loc)), | |
2489 | Make_Identifier (Loc, Name_uS))))); | |
ee6ba406 | 2490 | |
76a1c25b | 2491 | if Ekind (Conc_Typ) = E_Protected_Type then |
ee6ba406 | 2492 | |
acf97c11 | 2493 | Obj_Ref := -- T._object'Access |
2494 | Make_Attribute_Reference (Loc, | |
2495 | Attribute_Name => Name_Unchecked_Access, | |
2496 | Prefix => | |
2497 | Make_Selected_Component (Loc, | |
2498 | Prefix => Make_Identifier (Loc, Name_uT), | |
2499 | Selector_Name => Make_Identifier (Loc, Name_uObject))); | |
ee6ba406 | 2500 | |
acf97c11 | 2501 | case Corresponding_Runtime_Package (Conc_Typ) is |
2502 | when System_Tasking_Protected_Objects_Entries => | |
2503 | -- Generate: | |
e1c20931 | 2504 | |
acf97c11 | 2505 | -- Protected_Entry_Call |
2506 | -- (T._object'Access, -- Object | |
2507 | -- Protected_Entry_Index! (I), -- E | |
2508 | -- P, -- Uninterpreted_Data | |
2509 | -- Conditional_Call, -- Mode | |
2510 | -- Bnn); -- Block | |
e1c20931 | 2511 | |
acf97c11 | 2512 | -- where T is the protected object, I is the entry index, P |
2513 | -- are the wrapped parameters and Bnn is the name of the | |
2514 | -- communication block. | |
d62940bf | 2515 | |
acf97c11 | 2516 | Append_To (Stmts, |
2517 | Make_Procedure_Call_Statement (Loc, | |
2518 | Name => | |
2519 | New_Reference_To (RTE (RE_Protected_Entry_Call), Loc), | |
2520 | Parameter_Associations => | |
2521 | New_List ( | |
2522 | Obj_Ref, | |
d62940bf | 2523 | |
acf97c11 | 2524 | Make_Unchecked_Type_Conversion (Loc, -- entry index |
2525 | Subtype_Mark => | |
2526 | New_Reference_To | |
2527 | (RTE (RE_Protected_Entry_Index), Loc), | |
2528 | Expression => Make_Identifier (Loc, Name_uI)), | |
2529 | ||
2530 | Make_Identifier (Loc, Name_uP), -- parameter block | |
2531 | ||
2532 | New_Reference_To ( -- Conditional_Call | |
2533 | RTE (RE_Conditional_Call), Loc), | |
2534 | New_Reference_To ( -- Bnn | |
2535 | Blk_Nam, Loc)))); | |
2536 | ||
2537 | when System_Tasking_Protected_Objects_Single_Entry => | |
2538 | ||
2539 | -- If we are compiling for a restricted run-time, the call | |
2540 | -- uses the simpler form. | |
2541 | ||
2542 | Append_To (Stmts, | |
2543 | Make_Procedure_Call_Statement (Loc, | |
2544 | Name => | |
2545 | New_Reference_To | |
2546 | (RTE (RE_Protected_Single_Entry_Call), Loc), | |
2547 | Parameter_Associations => | |
2548 | New_List ( | |
2549 | Obj_Ref, | |
2550 | ||
2551 | Make_Attribute_Reference (Loc, | |
55868293 | 2552 | Prefix => Make_Identifier (Loc, Name_uP), |
acf97c11 | 2553 | Attribute_Name => Name_Address), |
2554 | ||
2555 | New_Reference_To | |
2556 | (RTE (RE_Conditional_Call), Loc)))); | |
2557 | when others => | |
2558 | raise Program_Error; | |
2559 | end case; | |
d62940bf | 2560 | |
76a1c25b | 2561 | -- Generate: |
2562 | -- F := not Cancelled (Bnn); | |
e1c20931 | 2563 | |
76a1c25b | 2564 | -- where F is the success flag. The status of Cancelled is negated |
2565 | -- in order to match the behaviour of the version for task types. | |
e1c20931 | 2566 | |
76a1c25b | 2567 | Append_To (Stmts, |
2568 | Make_Assignment_Statement (Loc, | |
55868293 | 2569 | Name => Make_Identifier (Loc, Name_uF), |
76a1c25b | 2570 | Expression => |
2571 | Make_Op_Not (Loc, | |
2572 | Right_Opnd => | |
2573 | Make_Function_Call (Loc, | |
2574 | Name => | |
2575 | New_Reference_To (RTE (RE_Cancelled), Loc), | |
2576 | Parameter_Associations => | |
2577 | New_List ( | |
2578 | New_Reference_To (Blk_Nam, Loc)))))); | |
2579 | else | |
2580 | pragma Assert (Ekind (Conc_Typ) = E_Task_Type); | |
d62940bf | 2581 | |
76a1c25b | 2582 | -- Generate: |
cdb1c38f | 2583 | -- Task_Entry_Call |
2584 | -- (T._task_id, -- Acceptor | |
2585 | -- Task_Entry_Index! (I), -- E | |
2586 | -- P, -- Uninterpreted_Data | |
2587 | -- Conditional_Call, -- Mode | |
2588 | -- F); -- Rendezvous_Successful | |
d62940bf | 2589 | |
76a1c25b | 2590 | -- where T is the task object, I is the entry index, P are the |
2591 | -- wrapped parameters and F is the status flag. | |
e1c20931 | 2592 | |
76a1c25b | 2593 | Append_To (Stmts, |
2594 | Make_Procedure_Call_Statement (Loc, | |
2595 | Name => | |
2596 | New_Reference_To (RTE (RE_Task_Entry_Call), Loc), | |
2597 | Parameter_Associations => | |
2598 | New_List ( | |
2599 | ||
2600 | Make_Selected_Component (Loc, -- T._task_id | |
55868293 | 2601 | Prefix => Make_Identifier (Loc, Name_uT), |
2602 | Selector_Name => Make_Identifier (Loc, Name_uTask_Id)), | |
76a1c25b | 2603 | |
2604 | Make_Unchecked_Type_Conversion (Loc, -- entry index | |
2605 | Subtype_Mark => | |
2606 | New_Reference_To (RTE (RE_Task_Entry_Index), Loc), | |
55868293 | 2607 | Expression => Make_Identifier (Loc, Name_uI)), |
76a1c25b | 2608 | |
2609 | Make_Identifier (Loc, Name_uP), -- parameter block | |
55868293 | 2610 | New_Reference_To -- Conditional_Call |
2611 | (RTE (RE_Conditional_Call), Loc), | |
76a1c25b | 2612 | Make_Identifier (Loc, Name_uF)))); -- status flag |
d62940bf | 2613 | end if; |
7c949aad | 2614 | |
2615 | else | |
2616 | -- Ensure that the statements list is non-empty | |
2617 | ||
2618 | Append_To (Stmts, Make_Null_Statement (Loc)); | |
76a1c25b | 2619 | end if; |
2620 | ||
2621 | return | |
2622 | Make_Subprogram_Body (Loc, | |
2623 | Specification => | |
2624 | Make_Disp_Conditional_Select_Spec (Typ), | |
2625 | Declarations => | |
2626 | Decls, | |
2627 | Handled_Statement_Sequence => | |
2628 | Make_Handled_Sequence_Of_Statements (Loc, Stmts)); | |
2629 | end Make_Disp_Conditional_Select_Body; | |
2630 | ||
2631 | --------------------------------------- | |
2632 | -- Make_Disp_Conditional_Select_Spec -- | |
2633 | --------------------------------------- | |
2634 | ||
2635 | function Make_Disp_Conditional_Select_Spec | |
2636 | (Typ : Entity_Id) return Node_Id | |
2637 | is | |
2638 | Loc : constant Source_Ptr := Sloc (Typ); | |
2639 | Def_Id : constant Node_Id := | |
2640 | Make_Defining_Identifier (Loc, | |
2641 | Name_uDisp_Conditional_Select); | |
2642 | Params : constant List_Id := New_List; | |
2643 | ||
2644 | begin | |
68f95949 | 2645 | pragma Assert (not Restriction_Active (No_Dispatching_Calls)); |
2646 | ||
725a69d2 | 2647 | -- T : in out Typ; -- Object parameter |
2648 | -- S : Integer; -- Primitive operation slot | |
2649 | -- P : Address; -- Wrapped parameters | |
2650 | -- C : out Prim_Op_Kind; -- Call kind | |
2651 | -- F : out Boolean; -- Status flag | |
2652 | ||
2653 | Append_List_To (Params, New_List ( | |
2654 | ||
2655 | Make_Parameter_Specification (Loc, | |
2656 | Defining_Identifier => | |
2657 | Make_Defining_Identifier (Loc, Name_uT), | |
2658 | Parameter_Type => | |
2659 | New_Reference_To (Typ, Loc), | |
2660 | In_Present => True, | |
2661 | Out_Present => True), | |
2662 | ||
2663 | Make_Parameter_Specification (Loc, | |
2664 | Defining_Identifier => | |
2665 | Make_Defining_Identifier (Loc, Name_uS), | |
2666 | Parameter_Type => | |
2667 | New_Reference_To (Standard_Integer, Loc)), | |
2668 | ||
2669 | Make_Parameter_Specification (Loc, | |
2670 | Defining_Identifier => | |
2671 | Make_Defining_Identifier (Loc, Name_uP), | |
2672 | Parameter_Type => | |
2673 | New_Reference_To (RTE (RE_Address), Loc)), | |
76a1c25b | 2674 | |
725a69d2 | 2675 | Make_Parameter_Specification (Loc, |
2676 | Defining_Identifier => | |
2677 | Make_Defining_Identifier (Loc, Name_uC), | |
2678 | Parameter_Type => | |
2679 | New_Reference_To (RTE (RE_Prim_Op_Kind), Loc), | |
2680 | Out_Present => True), | |
76a1c25b | 2681 | |
725a69d2 | 2682 | Make_Parameter_Specification (Loc, |
2683 | Defining_Identifier => | |
2684 | Make_Defining_Identifier (Loc, Name_uF), | |
2685 | Parameter_Type => | |
2686 | New_Reference_To (Standard_Boolean, Loc), | |
2687 | Out_Present => True))); | |
76a1c25b | 2688 | |
2689 | return | |
2690 | Make_Procedure_Specification (Loc, | |
2691 | Defining_Unit_Name => Def_Id, | |
2692 | Parameter_Specifications => Params); | |
2693 | end Make_Disp_Conditional_Select_Spec; | |
2694 | ||
2695 | ------------------------------------- | |
2696 | -- Make_Disp_Get_Prim_Op_Kind_Body -- | |
2697 | ------------------------------------- | |
2698 | ||
2699 | function Make_Disp_Get_Prim_Op_Kind_Body | |
2700 | (Typ : Entity_Id) return Node_Id | |
2701 | is | |
2702 | Loc : constant Source_Ptr := Sloc (Typ); | |
2703 | DT_Ptr : Entity_Id; | |
2704 | ||
2705 | begin | |
68f95949 | 2706 | pragma Assert (not Restriction_Active (No_Dispatching_Calls)); |
2707 | ||
76a1c25b | 2708 | if Is_Interface (Typ) then |
2709 | return | |
2710 | Make_Subprogram_Body (Loc, | |
2711 | Specification => | |
2712 | Make_Disp_Get_Prim_Op_Kind_Spec (Typ), | |
2713 | Declarations => | |
2714 | New_List, | |
2715 | Handled_Statement_Sequence => | |
2716 | Make_Handled_Sequence_Of_Statements (Loc, | |
2717 | New_List (Make_Null_Statement (Loc)))); | |
e1c20931 | 2718 | end if; |
2719 | ||
76a1c25b | 2720 | DT_Ptr := Node (First_Elmt (Access_Disp_Table (Typ))); |
2721 | ||
d62940bf | 2722 | -- Generate: |
76a1c25b | 2723 | -- C := get_prim_op_kind (tag! (<type>VP), S); |
ee6ba406 | 2724 | |
76a1c25b | 2725 | -- where C is the out parameter capturing the call kind and S is the |
2726 | -- dispatch table slot number. | |
ee6ba406 | 2727 | |
76a1c25b | 2728 | return |
2729 | Make_Subprogram_Body (Loc, | |
2730 | Specification => | |
2731 | Make_Disp_Get_Prim_Op_Kind_Spec (Typ), | |
2732 | Declarations => | |
2733 | New_List, | |
2734 | Handled_Statement_Sequence => | |
2735 | Make_Handled_Sequence_Of_Statements (Loc, | |
2736 | New_List ( | |
2737 | Make_Assignment_Statement (Loc, | |
2738 | Name => | |
2739 | Make_Identifier (Loc, Name_uC), | |
2740 | Expression => | |
725a69d2 | 2741 | Make_Function_Call (Loc, |
2742 | Name => | |
2743 | New_Reference_To (RTE (RE_Get_Prim_Op_Kind), Loc), | |
2744 | Parameter_Associations => New_List ( | |
2745 | Unchecked_Convert_To (RTE (RE_Tag), | |
2746 | New_Reference_To (DT_Ptr, Loc)), | |
2747 | Make_Identifier (Loc, Name_uS))))))); | |
76a1c25b | 2748 | end Make_Disp_Get_Prim_Op_Kind_Body; |
e1c20931 | 2749 | |
76a1c25b | 2750 | ------------------------------------- |
2751 | -- Make_Disp_Get_Prim_Op_Kind_Spec -- | |
2752 | ------------------------------------- | |
e1c20931 | 2753 | |
76a1c25b | 2754 | function Make_Disp_Get_Prim_Op_Kind_Spec |
2755 | (Typ : Entity_Id) return Node_Id | |
2756 | is | |
2757 | Loc : constant Source_Ptr := Sloc (Typ); | |
2758 | Def_Id : constant Node_Id := | |
2759 | Make_Defining_Identifier (Loc, | |
2760 | Name_uDisp_Get_Prim_Op_Kind); | |
2761 | Params : constant List_Id := New_List; | |
e1c20931 | 2762 | |
76a1c25b | 2763 | begin |
68f95949 | 2764 | pragma Assert (not Restriction_Active (No_Dispatching_Calls)); |
2765 | ||
725a69d2 | 2766 | -- T : in out Typ; -- Object parameter |
2767 | -- S : Integer; -- Primitive operation slot | |
2768 | -- C : out Prim_Op_Kind; -- Call kind | |
2769 | ||
2770 | Append_List_To (Params, New_List ( | |
2771 | ||
2772 | Make_Parameter_Specification (Loc, | |
2773 | Defining_Identifier => | |
2774 | Make_Defining_Identifier (Loc, Name_uT), | |
2775 | Parameter_Type => | |
2776 | New_Reference_To (Typ, Loc), | |
2777 | In_Present => True, | |
2778 | Out_Present => True), | |
ee6ba406 | 2779 | |
725a69d2 | 2780 | Make_Parameter_Specification (Loc, |
2781 | Defining_Identifier => | |
2782 | Make_Defining_Identifier (Loc, Name_uS), | |
2783 | Parameter_Type => | |
2784 | New_Reference_To (Standard_Integer, Loc)), | |
ee6ba406 | 2785 | |
725a69d2 | 2786 | Make_Parameter_Specification (Loc, |
2787 | Defining_Identifier => | |
2788 | Make_Defining_Identifier (Loc, Name_uC), | |
2789 | Parameter_Type => | |
2790 | New_Reference_To (RTE (RE_Prim_Op_Kind), Loc), | |
2791 | Out_Present => True))); | |
76a1c25b | 2792 | |
2793 | return | |
2794 | Make_Procedure_Specification (Loc, | |
2795 | Defining_Unit_Name => Def_Id, | |
2796 | Parameter_Specifications => Params); | |
2797 | end Make_Disp_Get_Prim_Op_Kind_Spec; | |
2798 | ||
2799 | -------------------------------- | |
2800 | -- Make_Disp_Get_Task_Id_Body -- | |
2801 | -------------------------------- | |
2802 | ||
2803 | function Make_Disp_Get_Task_Id_Body | |
2804 | (Typ : Entity_Id) return Node_Id | |
2805 | is | |
2806 | Loc : constant Source_Ptr := Sloc (Typ); | |
2807 | Ret : Node_Id; | |
2808 | ||
2809 | begin | |
68f95949 | 2810 | pragma Assert (not Restriction_Active (No_Dispatching_Calls)); |
2811 | ||
76a1c25b | 2812 | if Is_Concurrent_Record_Type (Typ) |
2813 | and then Ekind (Corresponding_Concurrent_Type (Typ)) = E_Task_Type | |
2814 | then | |
725a69d2 | 2815 | -- Generate: |
2816 | -- return To_Address (_T._task_id); | |
2817 | ||
76a1c25b | 2818 | Ret := |
17e14451 | 2819 | Make_Simple_Return_Statement (Loc, |
76a1c25b | 2820 | Expression => |
725a69d2 | 2821 | Make_Unchecked_Type_Conversion (Loc, |
2822 | Subtype_Mark => | |
2823 | New_Reference_To (RTE (RE_Address), Loc), | |
2824 | Expression => | |
2825 | Make_Selected_Component (Loc, | |
55868293 | 2826 | Prefix => Make_Identifier (Loc, Name_uT), |
2827 | Selector_Name => Make_Identifier (Loc, Name_uTask_Id)))); | |
76a1c25b | 2828 | |
2829 | -- A null body is constructed for non-task types | |
2830 | ||
2831 | else | |
725a69d2 | 2832 | -- Generate: |
2833 | -- return Null_Address; | |
2834 | ||
76a1c25b | 2835 | Ret := |
17e14451 | 2836 | Make_Simple_Return_Statement (Loc, |
76a1c25b | 2837 | Expression => |
725a69d2 | 2838 | New_Reference_To (RTE (RE_Null_Address), Loc)); |
76a1c25b | 2839 | end if; |
2840 | ||
2841 | return | |
2842 | Make_Subprogram_Body (Loc, | |
2843 | Specification => | |
2844 | Make_Disp_Get_Task_Id_Spec (Typ), | |
2845 | Declarations => | |
2846 | New_List, | |
2847 | Handled_Statement_Sequence => | |
2848 | Make_Handled_Sequence_Of_Statements (Loc, | |
2849 | New_List (Ret))); | |
2850 | end Make_Disp_Get_Task_Id_Body; | |
2851 | ||
2852 | -------------------------------- | |
2853 | -- Make_Disp_Get_Task_Id_Spec -- | |
2854 | -------------------------------- | |
2855 | ||
2856 | function Make_Disp_Get_Task_Id_Spec | |
2857 | (Typ : Entity_Id) return Node_Id | |
2858 | is | |
725a69d2 | 2859 | Loc : constant Source_Ptr := Sloc (Typ); |
76a1c25b | 2860 | |
2861 | begin | |
68f95949 | 2862 | pragma Assert (not Restriction_Active (No_Dispatching_Calls)); |
2863 | ||
76a1c25b | 2864 | return |
2865 | Make_Function_Specification (Loc, | |
725a69d2 | 2866 | Defining_Unit_Name => |
2867 | Make_Defining_Identifier (Loc, Name_uDisp_Get_Task_Id), | |
76a1c25b | 2868 | Parameter_Specifications => New_List ( |
2869 | Make_Parameter_Specification (Loc, | |
2870 | Defining_Identifier => | |
2871 | Make_Defining_Identifier (Loc, Name_uT), | |
2872 | Parameter_Type => | |
2873 | New_Reference_To (Typ, Loc))), | |
2874 | Result_Definition => | |
725a69d2 | 2875 | New_Reference_To (RTE (RE_Address), Loc)); |
76a1c25b | 2876 | end Make_Disp_Get_Task_Id_Spec; |
2877 | ||
cdb1c38f | 2878 | ---------------------------- |
2879 | -- Make_Disp_Requeue_Body -- | |
2880 | ---------------------------- | |
2881 | ||
2882 | function Make_Disp_Requeue_Body | |
2883 | (Typ : Entity_Id) return Node_Id | |
2884 | is | |
2885 | Loc : constant Source_Ptr := Sloc (Typ); | |
2886 | Conc_Typ : Entity_Id := Empty; | |
2887 | Stmts : constant List_Id := New_List; | |
2888 | ||
2889 | begin | |
2890 | pragma Assert (not Restriction_Active (No_Dispatching_Calls)); | |
2891 | ||
2892 | -- Null body is generated for interface types and non-concurrent | |
2893 | -- tagged types. | |
2894 | ||
2895 | if Is_Interface (Typ) | |
2896 | or else not Is_Concurrent_Record_Type (Typ) | |
2897 | then | |
2898 | return | |
2899 | Make_Subprogram_Body (Loc, | |
2900 | Specification => | |
2901 | Make_Disp_Requeue_Spec (Typ), | |
2902 | Declarations => | |
2903 | No_List, | |
2904 | Handled_Statement_Sequence => | |
2905 | Make_Handled_Sequence_Of_Statements (Loc, | |
2906 | New_List (Make_Null_Statement (Loc)))); | |
2907 | end if; | |
2908 | ||
2909 | Conc_Typ := Corresponding_Concurrent_Type (Typ); | |
2910 | ||
2911 | if Ekind (Conc_Typ) = E_Protected_Type then | |
2912 | ||
2913 | -- Generate statements: | |
2914 | -- if F then | |
2915 | -- System.Tasking.Protected_Objects.Operations. | |
2916 | -- Requeue_Protected_Entry | |
2917 | -- (Protection_Entries_Access (P), | |
2918 | -- O._object'Unchecked_Access, | |
2919 | -- Protected_Entry_Index (I), | |
2920 | -- A); | |
2921 | -- else | |
2922 | -- System.Tasking.Protected_Objects.Operations. | |
2923 | -- Requeue_Task_To_Protected_Entry | |
2924 | -- (O._object'Unchecked_Access, | |
2925 | -- Protected_Entry_Index (I), | |
2926 | -- A); | |
2927 | -- end if; | |
2928 | ||
acf97c11 | 2929 | if Restriction_Active (No_Entry_Queue) then |
2930 | Append_To (Stmts, Make_Null_Statement (Loc)); | |
2931 | else | |
2932 | Append_To (Stmts, | |
2933 | Make_If_Statement (Loc, | |
55868293 | 2934 | Condition => Make_Identifier (Loc, Name_uF), |
cdb1c38f | 2935 | |
acf97c11 | 2936 | Then_Statements => |
2937 | New_List ( | |
cdb1c38f | 2938 | |
acf97c11 | 2939 | -- Call to Requeue_Protected_Entry |
cdb1c38f | 2940 | |
acf97c11 | 2941 | Make_Procedure_Call_Statement (Loc, |
2942 | Name => | |
2943 | New_Reference_To ( | |
2944 | RTE (RE_Requeue_Protected_Entry), Loc), | |
2945 | Parameter_Associations => | |
2946 | New_List ( | |
2947 | ||
2948 | Make_Unchecked_Type_Conversion (Loc, -- PEA (P) | |
2949 | Subtype_Mark => | |
2950 | New_Reference_To ( | |
2951 | RTE (RE_Protection_Entries_Access), Loc), | |
2952 | Expression => | |
2953 | Make_Identifier (Loc, Name_uP)), | |
2954 | ||
2955 | Make_Attribute_Reference (Loc, -- O._object'Acc | |
2956 | Attribute_Name => | |
2957 | Name_Unchecked_Access, | |
2958 | Prefix => | |
2959 | Make_Selected_Component (Loc, | |
55868293 | 2960 | Prefix => |
acf97c11 | 2961 | Make_Identifier (Loc, Name_uO), |
2962 | Selector_Name => | |
2963 | Make_Identifier (Loc, Name_uObject))), | |
2964 | ||
2965 | Make_Unchecked_Type_Conversion (Loc, -- entry index | |
2966 | Subtype_Mark => | |
2967 | New_Reference_To ( | |
2968 | RTE (RE_Protected_Entry_Index), Loc), | |
55868293 | 2969 | Expression => Make_Identifier (Loc, Name_uI)), |
cdb1c38f | 2970 | |
acf97c11 | 2971 | Make_Identifier (Loc, Name_uA)))), -- abort status |
cdb1c38f | 2972 | |
acf97c11 | 2973 | Else_Statements => |
2974 | New_List ( | |
cdb1c38f | 2975 | |
acf97c11 | 2976 | -- Call to Requeue_Task_To_Protected_Entry |
cdb1c38f | 2977 | |
acf97c11 | 2978 | Make_Procedure_Call_Statement (Loc, |
2979 | Name => | |
2980 | New_Reference_To ( | |
2981 | RTE (RE_Requeue_Task_To_Protected_Entry), Loc), | |
2982 | Parameter_Associations => | |
2983 | New_List ( | |
2984 | ||
2985 | Make_Attribute_Reference (Loc, -- O._object'Acc | |
2986 | Attribute_Name => | |
2987 | Name_Unchecked_Access, | |
2988 | Prefix => | |
2989 | Make_Selected_Component (Loc, | |
2990 | Prefix => | |
2991 | Make_Identifier (Loc, Name_uO), | |
2992 | Selector_Name => | |
2993 | Make_Identifier (Loc, Name_uObject))), | |
2994 | ||
2995 | Make_Unchecked_Type_Conversion (Loc, -- entry index | |
2996 | Subtype_Mark => | |
2997 | New_Reference_To ( | |
2998 | RTE (RE_Protected_Entry_Index), Loc), | |
2999 | Expression => | |
3000 | Make_Identifier (Loc, Name_uI)), | |
cdb1c38f | 3001 | |
acf97c11 | 3002 | Make_Identifier (Loc, Name_uA)))))); -- abort status |
3003 | end if; | |
cdb1c38f | 3004 | else |
3005 | pragma Assert (Is_Task_Type (Conc_Typ)); | |
3006 | ||
3007 | -- Generate: | |
3008 | -- if F then | |
3009 | -- System.Tasking.Rendezvous.Requeue_Protected_To_Task_Entry | |
3010 | -- (Protection_Entries_Access (P), | |
3011 | -- O._task_id, | |
3012 | -- Task_Entry_Index (I), | |
3013 | -- A); | |
3014 | -- else | |
3015 | -- System.Tasking.Rendezvous.Requeue_Task_Entry | |
3016 | -- (O._task_id, | |
3017 | -- Task_Entry_Index (I), | |
3018 | -- A); | |
3019 | -- end if; | |
3020 | ||
3021 | Append_To (Stmts, | |
3022 | Make_If_Statement (Loc, | |
55868293 | 3023 | Condition => Make_Identifier (Loc, Name_uF), |
cdb1c38f | 3024 | |
55868293 | 3025 | Then_Statements => New_List ( |
cdb1c38f | 3026 | |
55868293 | 3027 | -- Call to Requeue_Protected_To_Task_Entry |
cdb1c38f | 3028 | |
55868293 | 3029 | Make_Procedure_Call_Statement (Loc, |
3030 | Name => | |
3031 | New_Reference_To | |
3032 | (RTE (RE_Requeue_Protected_To_Task_Entry), Loc), | |
cdb1c38f | 3033 | |
55868293 | 3034 | Parameter_Associations => New_List ( |
cdb1c38f | 3035 | |
55868293 | 3036 | Make_Unchecked_Type_Conversion (Loc, -- PEA (P) |
3037 | Subtype_Mark => | |
3038 | New_Reference_To | |
3039 | (RTE (RE_Protection_Entries_Access), Loc), | |
3040 | Expression => Make_Identifier (Loc, Name_uP)), | |
cdb1c38f | 3041 | |
55868293 | 3042 | Make_Selected_Component (Loc, -- O._task_id |
3043 | Prefix => Make_Identifier (Loc, Name_uO), | |
3044 | Selector_Name => Make_Identifier (Loc, Name_uTask_Id)), | |
cdb1c38f | 3045 | |
55868293 | 3046 | Make_Unchecked_Type_Conversion (Loc, -- entry index |
3047 | Subtype_Mark => | |
3048 | New_Reference_To (RTE (RE_Task_Entry_Index), Loc), | |
3049 | Expression => Make_Identifier (Loc, Name_uI)), | |
cdb1c38f | 3050 | |
55868293 | 3051 | Make_Identifier (Loc, Name_uA)))), -- abort status |
cdb1c38f | 3052 | |
55868293 | 3053 | Else_Statements => New_List ( |
cdb1c38f | 3054 | |
55868293 | 3055 | -- Call to Requeue_Task_Entry |
cdb1c38f | 3056 | |
55868293 | 3057 | Make_Procedure_Call_Statement (Loc, |
3058 | Name => New_Reference_To (RTE (RE_Requeue_Task_Entry), Loc), | |
cdb1c38f | 3059 | |
55868293 | 3060 | Parameter_Associations => New_List ( |
cdb1c38f | 3061 | |
55868293 | 3062 | Make_Selected_Component (Loc, -- O._task_id |
3063 | Prefix => Make_Identifier (Loc, Name_uO), | |
3064 | Selector_Name => Make_Identifier (Loc, Name_uTask_Id)), | |
cdb1c38f | 3065 | |
55868293 | 3066 | Make_Unchecked_Type_Conversion (Loc, -- entry index |
3067 | Subtype_Mark => | |
3068 | New_Reference_To (RTE (RE_Task_Entry_Index), Loc), | |
3069 | Expression => Make_Identifier (Loc, Name_uI)), | |
cdb1c38f | 3070 | |
55868293 | 3071 | Make_Identifier (Loc, Name_uA)))))); -- abort status |
cdb1c38f | 3072 | end if; |
3073 | ||
3074 | -- Even though no declarations are needed in both cases, we allocate | |
3075 | -- a list for entities added by Freeze. | |
3076 | ||
3077 | return | |
3078 | Make_Subprogram_Body (Loc, | |
3079 | Specification => | |
3080 | Make_Disp_Requeue_Spec (Typ), | |
3081 | Declarations => | |
3082 | New_List, | |
3083 | Handled_Statement_Sequence => | |
3084 | Make_Handled_Sequence_Of_Statements (Loc, Stmts)); | |
3085 | end Make_Disp_Requeue_Body; | |
3086 | ||
3087 | ---------------------------- | |
3088 | -- Make_Disp_Requeue_Spec -- | |
3089 | ---------------------------- | |
3090 | ||
3091 | function Make_Disp_Requeue_Spec | |
3092 | (Typ : Entity_Id) return Node_Id | |
3093 | is | |
3094 | Loc : constant Source_Ptr := Sloc (Typ); | |
3095 | ||
3096 | begin | |
3097 | pragma Assert (not Restriction_Active (No_Dispatching_Calls)); | |
3098 | ||
3099 | -- O : in out Typ; - Object parameter | |
3100 | -- F : Boolean; - Protected (True) / task (False) flag | |
3101 | -- P : Address; - Protection_Entries_Access value | |
3102 | -- I : Entry_Index - Index of entry call | |
3103 | -- A : Boolean - Abort flag | |
3104 | ||
3105 | -- Note that the Protection_Entries_Access value is represented as a | |
3106 | -- System.Address in order to avoid dragging in the tasking runtime | |
3107 | -- when compiling sources without tasking constructs. | |
3108 | ||
3109 | return | |
3110 | Make_Procedure_Specification (Loc, | |
3111 | Defining_Unit_Name => | |
3112 | Make_Defining_Identifier (Loc, Name_uDisp_Requeue), | |
3113 | ||
3114 | Parameter_Specifications => | |
3115 | New_List ( | |
3116 | ||
3117 | Make_Parameter_Specification (Loc, -- O | |
3118 | Defining_Identifier => | |
3119 | Make_Defining_Identifier (Loc, Name_uO), | |
3120 | Parameter_Type => | |
3121 | New_Reference_To (Typ, Loc), | |
3122 | In_Present => True, | |
3123 | Out_Present => True), | |
3124 | ||
3125 | Make_Parameter_Specification (Loc, -- F | |
3126 | Defining_Identifier => | |
3127 | Make_Defining_Identifier (Loc, Name_uF), | |
3128 | Parameter_Type => | |
3129 | New_Reference_To (Standard_Boolean, Loc)), | |
3130 | ||
3131 | Make_Parameter_Specification (Loc, -- P | |
3132 | Defining_Identifier => | |
3133 | Make_Defining_Identifier (Loc, Name_uP), | |
3134 | Parameter_Type => | |
3135 | New_Reference_To (RTE (RE_Address), Loc)), | |
3136 | ||
3137 | Make_Parameter_Specification (Loc, -- I | |
3138 | Defining_Identifier => | |
3139 | Make_Defining_Identifier (Loc, Name_uI), | |
3140 | Parameter_Type => | |
3141 | New_Reference_To (Standard_Integer, Loc)), | |
3142 | ||
3143 | Make_Parameter_Specification (Loc, -- A | |
3144 | Defining_Identifier => | |
3145 | Make_Defining_Identifier (Loc, Name_uA), | |
3146 | Parameter_Type => | |
3147 | New_Reference_To (Standard_Boolean, Loc)))); | |
3148 | end Make_Disp_Requeue_Spec; | |
3149 | ||
76a1c25b | 3150 | --------------------------------- |
3151 | -- Make_Disp_Timed_Select_Body -- | |
3152 | --------------------------------- | |
3153 | ||
cdb1c38f | 3154 | -- For interface types, generate: |
3155 | ||
3156 | -- procedure _Disp_Timed_Select | |
3157 | -- (T : in out <Typ>; | |
3158 | -- S : Integer; | |
3159 | -- P : System.Address; | |
3160 | -- D : Duration; | |
3161 | -- M : Integer; | |
3162 | -- C : out Ada.Tags.Prim_Op_Kind; | |
3163 | -- F : out Boolean) | |
3164 | -- is | |
3165 | -- begin | |
3166 | -- null; | |
3167 | -- end _Disp_Timed_Select; | |
3168 | ||
3169 | -- For protected types, generate: | |
3170 | ||
3171 | -- procedure _Disp_Timed_Select | |
3172 | -- (T : in out <Typ>; | |
3173 | -- S : Integer; | |
3174 | -- P : System.Address; | |
3175 | -- D : Duration; | |
3176 | -- M : Integer; | |
3177 | -- C : out Ada.Tags.Prim_Op_Kind; | |
3178 | -- F : out Boolean) | |
3179 | -- is | |
3180 | -- I : Integer; | |
3181 | ||
3182 | -- begin | |
3183 | -- C := Ada.Tags.Get_Prim_Op_Kind (Ada.Tags.Tag (<Typ>VP), S); | |
3184 | ||
3185 | -- if C = Ada.Tags.POK_Procedure | |
3186 | -- or else C = Ada.Tags.POK_Protected_Procedure | |
3187 | -- or else C = Ada.Tags.POK_Task_Procedure | |
3188 | -- then | |
3189 | -- F := True; | |
3190 | -- return; | |
3191 | -- end if; | |
3192 | ||
3193 | -- I := Ada.Tags.Get_Entry_Index (Ada.Tags.Tag (<Typ>VP), S); | |
3194 | -- System.Tasking.Protected_Objects.Operations. | |
3195 | -- Timed_Protected_Entry_Call | |
3196 | -- (T._object'Access, | |
3197 | -- System.Tasking.Protected_Objects.Protected_Entry_Index (I), | |
3198 | -- P, | |
3199 | -- D, | |
3200 | -- M, | |
3201 | -- F); | |
3202 | -- end _Disp_Timed_Select; | |
3203 | ||
3204 | -- For task types, generate: | |
3205 | ||
3206 | -- procedure _Disp_Timed_Select | |
3207 | -- (T : in out <Typ>; | |
3208 | -- S : Integer; | |
3209 | -- P : System.Address; | |
3210 | -- D : Duration; | |
3211 | -- M : Integer; | |
3212 | -- C : out Ada.Tags.Prim_Op_Kind; | |
3213 | -- F : out Boolean) | |
3214 | -- is | |
3215 | -- I : Integer; | |
3216 | ||
3217 | -- begin | |
3218 | -- I := Ada.Tags.Get_Entry_Index (Ada.Tags.Tag (<Typ>VP), S); | |
3219 | -- System.Tasking.Rendezvous.Timed_Task_Entry_Call | |
3220 | -- (T._task_id, | |
3221 | -- System.Tasking.Task_Entry_Index (I), | |
3222 | -- P, | |
3223 | -- D, | |
3224 | -- M, | |
3225 | -- D); | |
3226 | -- end _Disp_Time_Select; | |
3227 | ||
76a1c25b | 3228 | function Make_Disp_Timed_Select_Body |
3229 | (Typ : Entity_Id) return Node_Id | |
3230 | is | |
3231 | Loc : constant Source_Ptr := Sloc (Typ); | |
3232 | Conc_Typ : Entity_Id := Empty; | |
3233 | Decls : constant List_Id := New_List; | |
3234 | DT_Ptr : Entity_Id; | |
acf97c11 | 3235 | Obj_Ref : Node_Id; |
76a1c25b | 3236 | Stmts : constant List_Id := New_List; |
3237 | ||
3238 | begin | |
68f95949 | 3239 | pragma Assert (not Restriction_Active (No_Dispatching_Calls)); |
3240 | ||
952af0b9 | 3241 | -- Null body is generated for interface types |
3242 | ||
76a1c25b | 3243 | if Is_Interface (Typ) then |
3244 | return | |
3245 | Make_Subprogram_Body (Loc, | |
3246 | Specification => | |
3247 | Make_Disp_Timed_Select_Spec (Typ), | |
3248 | Declarations => | |
3249 | New_List, | |
3250 | Handled_Statement_Sequence => | |
3251 | Make_Handled_Sequence_Of_Statements (Loc, | |
3252 | New_List (Make_Null_Statement (Loc)))); | |
3253 | end if; | |
3254 | ||
76a1c25b | 3255 | DT_Ptr := Node (First_Elmt (Access_Disp_Table (Typ))); |
3256 | ||
952af0b9 | 3257 | if Is_Concurrent_Record_Type (Typ) then |
3258 | Conc_Typ := Corresponding_Concurrent_Type (Typ); | |
76a1c25b | 3259 | |
3260 | -- Generate: | |
3261 | -- I : Integer; | |
3262 | ||
3263 | -- where I will be used to capture the entry index of the primitive | |
3264 | -- wrapper at position S. | |
3265 | ||
3266 | Append_To (Decls, | |
3267 | Make_Object_Declaration (Loc, | |
3268 | Defining_Identifier => | |
3269 | Make_Defining_Identifier (Loc, Name_uI), | |
3270 | Object_Definition => | |
3271 | New_Reference_To (Standard_Integer, Loc))); | |
76a1c25b | 3272 | |
952af0b9 | 3273 | -- Generate: |
3274 | -- C := Get_Prim_Op_Kind (tag! (<type>VP), S); | |
76a1c25b | 3275 | |
952af0b9 | 3276 | -- if C = POK_Procedure |
3277 | -- or else C = POK_Protected_Procedure | |
3278 | -- or else C = POK_Task_Procedure; | |
3279 | -- then | |
3280 | -- F := True; | |
3281 | -- return; | |
3282 | -- end if; | |
76a1c25b | 3283 | |
725a69d2 | 3284 | Build_Common_Dispatching_Select_Statements (Loc, DT_Ptr, Stmts); |
76a1c25b | 3285 | |
3286 | -- Generate: | |
952af0b9 | 3287 | -- I := Get_Entry_Index (tag! (<type>VP), S); |
76a1c25b | 3288 | |
3289 | -- I is the entry index and S is the dispatch table slot | |
3290 | ||
3291 | Append_To (Stmts, | |
3292 | Make_Assignment_Statement (Loc, | |
55868293 | 3293 | Name => Make_Identifier (Loc, Name_uI), |
76a1c25b | 3294 | Expression => |
725a69d2 | 3295 | Make_Function_Call (Loc, |
cdb1c38f | 3296 | Name => |
3297 | New_Reference_To (RTE (RE_Get_Entry_Index), Loc), | |
3298 | Parameter_Associations => | |
3299 | New_List ( | |
3300 | Unchecked_Convert_To (RTE (RE_Tag), | |
3301 | New_Reference_To (DT_Ptr, Loc)), | |
3302 | Make_Identifier (Loc, Name_uS))))); | |
76a1c25b | 3303 | |
acf97c11 | 3304 | -- Protected case |
3305 | ||
76a1c25b | 3306 | if Ekind (Conc_Typ) = E_Protected_Type then |
3307 | ||
acf97c11 | 3308 | -- Build T._object'Access |
3309 | ||
3310 | Obj_Ref := | |
3311 | Make_Attribute_Reference (Loc, | |
3312 | Attribute_Name => Name_Unchecked_Access, | |
3313 | Prefix => | |
3314 | Make_Selected_Component (Loc, | |
3315 | Prefix => Make_Identifier (Loc, Name_uT), | |
3316 | Selector_Name => Make_Identifier (Loc, Name_uObject))); | |
3317 | ||
3318 | -- Normal case, No_Entry_Queue restriction not active. In this | |
3319 | -- case we generate: | |
3320 | ||
3321 | -- Timed_Protected_Entry_Call | |
3322 | -- (T._object'access, | |
cdb1c38f | 3323 | -- Protected_Entry_Index! (I), |
acf97c11 | 3324 | -- P, D, M, F); |
76a1c25b | 3325 | |
3326 | -- where T is the protected object, I is the entry index, P are | |
3327 | -- the wrapped parameters, D is the delay amount, M is the delay | |
3328 | -- mode and F is the status flag. | |
3329 | ||
acf97c11 | 3330 | case Corresponding_Runtime_Package (Conc_Typ) is |
3331 | when System_Tasking_Protected_Objects_Entries => | |
3332 | Append_To (Stmts, | |
3333 | Make_Procedure_Call_Statement (Loc, | |
3334 | Name => | |
3335 | New_Reference_To | |
3336 | (RTE (RE_Timed_Protected_Entry_Call), Loc), | |
3337 | Parameter_Associations => | |
3338 | New_List ( | |
3339 | Obj_Ref, | |
3340 | ||
3341 | Make_Unchecked_Type_Conversion (Loc, -- entry index | |
3342 | Subtype_Mark => | |
3343 | New_Reference_To | |
3344 | (RTE (RE_Protected_Entry_Index), Loc), | |
3345 | Expression => | |
3346 | Make_Identifier (Loc, Name_uI)), | |
76a1c25b | 3347 | |
acf97c11 | 3348 | Make_Identifier (Loc, Name_uP), -- parameter block |
3349 | Make_Identifier (Loc, Name_uD), -- delay | |
3350 | Make_Identifier (Loc, Name_uM), -- delay mode | |
3351 | Make_Identifier (Loc, Name_uF)))); -- status flag | |
76a1c25b | 3352 | |
acf97c11 | 3353 | when System_Tasking_Protected_Objects_Single_Entry => |
3354 | -- Generate: | |
76a1c25b | 3355 | |
acf97c11 | 3356 | -- Timed_Protected_Single_Entry_Call |
3357 | -- (T._object'access, P, D, M, F); | |
3358 | ||
3359 | -- where T is the protected object, P is the wrapped | |
3360 | -- parameters, D is the delay amount, M is the delay mode, F | |
3361 | -- is the status flag. | |
3362 | ||
3363 | Append_To (Stmts, | |
3364 | Make_Procedure_Call_Statement (Loc, | |
3365 | Name => | |
3366 | New_Reference_To | |
3367 | (RTE (RE_Timed_Protected_Single_Entry_Call), Loc), | |
3368 | Parameter_Associations => | |
3369 | New_List ( | |
3370 | Obj_Ref, | |
3371 | Make_Identifier (Loc, Name_uP), -- parameter block | |
3372 | Make_Identifier (Loc, Name_uD), -- delay | |
3373 | Make_Identifier (Loc, Name_uM), -- delay mode | |
3374 | Make_Identifier (Loc, Name_uF)))); -- status flag | |
3375 | ||
3376 | when others => | |
3377 | raise Program_Error; | |
3378 | end case; | |
3379 | ||
3380 | -- Task case | |
ee6ba406 | 3381 | |
ee6ba406 | 3382 | else |
76a1c25b | 3383 | pragma Assert (Ekind (Conc_Typ) = E_Task_Type); |
3384 | ||
3385 | -- Generate: | |
3386 | -- Timed_Task_Entry_Call ( | |
3387 | -- T._task_id, | |
cdb1c38f | 3388 | -- Task_Entry_Index! (I), |
76a1c25b | 3389 | -- P, |
3390 | -- D, | |
3391 | -- M, | |
3392 | -- F); | |
3393 | ||
3394 | -- where T is the task object, I is the entry index, P are the | |
3395 | -- wrapped parameters, D is the delay amount, M is the delay | |
3396 | -- mode and F is the status flag. | |
3397 | ||
3398 | Append_To (Stmts, | |
3399 | Make_Procedure_Call_Statement (Loc, | |
3400 | Name => | |
3401 | New_Reference_To (RTE (RE_Timed_Task_Entry_Call), Loc), | |
3402 | Parameter_Associations => | |
3403 | New_List ( | |
3404 | ||
3405 | Make_Selected_Component (Loc, -- T._task_id | |
55868293 | 3406 | Prefix => Make_Identifier (Loc, Name_uT), |
3407 | Selector_Name => Make_Identifier (Loc, Name_uTask_Id)), | |
76a1c25b | 3408 | |
3409 | Make_Unchecked_Type_Conversion (Loc, -- entry index | |
3410 | Subtype_Mark => | |
3411 | New_Reference_To (RTE (RE_Task_Entry_Index), Loc), | |
55868293 | 3412 | Expression => Make_Identifier (Loc, Name_uI)), |
76a1c25b | 3413 | |
3414 | Make_Identifier (Loc, Name_uP), -- parameter block | |
3415 | Make_Identifier (Loc, Name_uD), -- delay | |
3416 | Make_Identifier (Loc, Name_uM), -- delay mode | |
3417 | Make_Identifier (Loc, Name_uF)))); -- status flag | |
ee6ba406 | 3418 | end if; |
7c949aad | 3419 | |
3420 | else | |
3421 | -- Ensure that the statements list is non-empty | |
3422 | ||
3423 | Append_To (Stmts, Make_Null_Statement (Loc)); | |
76a1c25b | 3424 | end if; |
3425 | ||
3426 | return | |
3427 | Make_Subprogram_Body (Loc, | |
3428 | Specification => | |
3429 | Make_Disp_Timed_Select_Spec (Typ), | |
3430 | Declarations => | |
3431 | Decls, | |
3432 | Handled_Statement_Sequence => | |
3433 | Make_Handled_Sequence_Of_Statements (Loc, Stmts)); | |
3434 | end Make_Disp_Timed_Select_Body; | |
3435 | ||
3436 | --------------------------------- | |
3437 | -- Make_Disp_Timed_Select_Spec -- | |
3438 | --------------------------------- | |
3439 | ||
3440 | function Make_Disp_Timed_Select_Spec | |
3441 | (Typ : Entity_Id) return Node_Id | |
3442 | is | |
3443 | Loc : constant Source_Ptr := Sloc (Typ); | |
3444 | Def_Id : constant Node_Id := | |
3445 | Make_Defining_Identifier (Loc, | |
3446 | Name_uDisp_Timed_Select); | |
3447 | Params : constant List_Id := New_List; | |
ee6ba406 | 3448 | |
76a1c25b | 3449 | begin |
68f95949 | 3450 | pragma Assert (not Restriction_Active (No_Dispatching_Calls)); |
3451 | ||
725a69d2 | 3452 | -- T : in out Typ; -- Object parameter |
3453 | -- S : Integer; -- Primitive operation slot | |
3454 | -- P : Address; -- Wrapped parameters | |
3455 | -- D : Duration; -- Delay | |
3456 | -- M : Integer; -- Delay Mode | |
3457 | -- C : out Prim_Op_Kind; -- Call kind | |
3458 | -- F : out Boolean; -- Status flag | |
76a1c25b | 3459 | |
725a69d2 | 3460 | Append_List_To (Params, New_List ( |
3461 | ||
3462 | Make_Parameter_Specification (Loc, | |
3463 | Defining_Identifier => | |
3464 | Make_Defining_Identifier (Loc, Name_uT), | |
3465 | Parameter_Type => | |
3466 | New_Reference_To (Typ, Loc), | |
3467 | In_Present => True, | |
3468 | Out_Present => True), | |
3469 | ||
3470 | Make_Parameter_Specification (Loc, | |
3471 | Defining_Identifier => | |
3472 | Make_Defining_Identifier (Loc, Name_uS), | |
3473 | Parameter_Type => | |
3474 | New_Reference_To (Standard_Integer, Loc)), | |
3475 | ||
3476 | Make_Parameter_Specification (Loc, | |
3477 | Defining_Identifier => | |
3478 | Make_Defining_Identifier (Loc, Name_uP), | |
3479 | Parameter_Type => | |
3480 | New_Reference_To (RTE (RE_Address), Loc)), | |
76a1c25b | 3481 | |
76a1c25b | 3482 | Make_Parameter_Specification (Loc, |
3483 | Defining_Identifier => | |
3484 | Make_Defining_Identifier (Loc, Name_uD), | |
3485 | Parameter_Type => | |
725a69d2 | 3486 | New_Reference_To (Standard_Duration, Loc)), |
76a1c25b | 3487 | |
76a1c25b | 3488 | Make_Parameter_Specification (Loc, |
3489 | Defining_Identifier => | |
3490 | Make_Defining_Identifier (Loc, Name_uM), | |
3491 | Parameter_Type => | |
725a69d2 | 3492 | New_Reference_To (Standard_Integer, Loc)), |
ee6ba406 | 3493 | |
725a69d2 | 3494 | Make_Parameter_Specification (Loc, |
3495 | Defining_Identifier => | |
3496 | Make_Defining_Identifier (Loc, Name_uC), | |
3497 | Parameter_Type => | |
3498 | New_Reference_To (RTE (RE_Prim_Op_Kind), Loc), | |
3499 | Out_Present => True))); | |
ee6ba406 | 3500 | |
725a69d2 | 3501 | Append_To (Params, |
3502 | Make_Parameter_Specification (Loc, | |
3503 | Defining_Identifier => | |
3504 | Make_Defining_Identifier (Loc, Name_uF), | |
3505 | Parameter_Type => | |
3506 | New_Reference_To (Standard_Boolean, Loc), | |
3507 | Out_Present => True)); | |
ee6ba406 | 3508 | |
76a1c25b | 3509 | return |
3510 | Make_Procedure_Specification (Loc, | |
3511 | Defining_Unit_Name => Def_Id, | |
3512 | Parameter_Specifications => Params); | |
3513 | end Make_Disp_Timed_Select_Spec; | |
ee6ba406 | 3514 | |
76a1c25b | 3515 | ------------- |
3516 | -- Make_DT -- | |
3517 | ------------- | |
ee6ba406 | 3518 | |
725a69d2 | 3519 | -- The frontend supports two models for expanding dispatch tables |
3520 | -- associated with library-level defined tagged types: statically | |
3521 | -- and non-statically allocated dispatch tables. In the former case | |
3522 | -- the object containing the dispatch table is constant and it is | |
3523 | -- initialized by means of a positional aggregate. In the latter case, | |
3524 | -- the object containing the dispatch table is a variable which is | |
3525 | -- initialized by means of assignments. | |
3526 | ||
3527 | -- In case of locally defined tagged types, the object containing the | |
3528 | -- object containing the dispatch table is always a variable (instead | |
3529 | -- of a constant). This is currently required to give support to late | |
3530 | -- overriding of primitives. For example: | |
3531 | ||
3532 | -- procedure Example is | |
3533 | -- package Pkg is | |
3534 | -- type T1 is tagged null record; | |
3535 | -- procedure Prim (O : T1); | |
3536 | -- end Pkg; | |
3537 | ||
3538 | -- type T2 is new Pkg.T1 with null record; | |
3539 | -- procedure Prim (X : T2) is -- late overriding | |
3540 | -- begin | |
3541 | -- ... | |
3542 | -- ... | |
3543 | -- end; | |
952af0b9 | 3544 | |
17e14451 | 3545 | function Make_DT (Typ : Entity_Id; N : Node_Id := Empty) return List_Id is |
3546 | Loc : constant Source_Ptr := Sloc (Typ); | |
3547 | ||
725a69d2 | 3548 | Max_Predef_Prims : constant Int := |
3549 | UI_To_Int | |
3550 | (Intval | |
3551 | (Expression | |
17e14451 | 3552 | (Parent (RTE (RE_Max_Predef_Prims))))); |
3553 | ||
cc60bd16 | 3554 | DT_Decl : constant Elist_Id := New_Elmt_List; |
3555 | DT_Aggr : constant Elist_Id := New_Elmt_List; | |
3556 | -- Entities marked with attribute Is_Dispatch_Table_Entity | |
3557 | ||
17e14451 | 3558 | procedure Check_Premature_Freezing (Subp : Entity_Id; Typ : Entity_Id); |
3559 | -- Verify that all non-tagged types in the profile of a subprogram | |
3560 | -- are frozen at the point the subprogram is frozen. This enforces | |
3561 | -- the rule on RM 13.14 (14) as modified by AI05-019. At the point a | |
3562 | -- subprogram is frozen, enough must be known about it to build the | |
3563 | -- activation record for it, which requires at least that the size of | |
3564 | -- all parameters be known. Controlling arguments are by-reference, | |
3565 | -- and therefore the rule only applies to non-tagged types. | |
3566 | -- Typical violation of the rule involves an object declaration that | |
3567 | -- freezes a tagged type, when one of its primitive operations has a | |
3568 | -- type in its profile whose full view has not been analyzed yet. | |
725a69d2 | 3569 | |
f301a57b | 3570 | procedure Export_DT (Typ : Entity_Id; DT : Entity_Id; Index : Nat := 0); |
3571 | -- Export the dispatch table DT of tagged type Typ. Required to generate | |
3572 | -- forward references and statically allocate the table. For primary | |
3573 | -- dispatch tables Index is 0; for secondary dispatch tables the value | |
3574 | -- of index must match the Suffix_Index value assigned to the table by | |
3575 | -- Make_Tags when generating its unique external name, and it is used to | |
3576 | -- retrieve from the Dispatch_Table_Wrappers list associated with Typ | |
3577 | -- the external name generated by Import_DT. | |
24971415 | 3578 | |
725a69d2 | 3579 | procedure Make_Secondary_DT |
acf97c11 | 3580 | (Typ : Entity_Id; |
3581 | Iface : Entity_Id; | |
f301a57b | 3582 | Suffix_Index : Int; |
acf97c11 | 3583 | Num_Iface_Prims : Nat; |
3584 | Iface_DT_Ptr : Entity_Id; | |
3585 | Predef_Prims_Ptr : Entity_Id; | |
3586 | Build_Thunks : Boolean; | |
3587 | Result : List_Id); | |
cdb1c38f | 3588 | -- Ada 2005 (AI-251): Expand the declarations for a Secondary Dispatch |
3589 | -- Table of Typ associated with Iface. Each abstract interface of Typ | |
3590 | -- has two secondary dispatch tables: one containing pointers to thunks | |
3591 | -- and another containing pointers to the primitives covering the | |
3592 | -- interface primitives. The former secondary table is generated when | |
3593 | -- Build_Thunks is True, and provides common support for dispatching | |
3594 | -- calls through interface types; the latter secondary table is | |
3595 | -- generated when Build_Thunks is False, and provides support for | |
3596 | -- Generic Dispatching Constructors that dispatch calls through | |
f301a57b | 3597 | -- interface types. When constructing this latter table the value |
3598 | -- of Suffix_Index is -1 to indicate that there is no need to export | |
3599 | -- such table when building statically allocated dispatch tables; a | |
3600 | -- positive value of Suffix_Index must match the Suffix_Index value | |
3601 | -- assigned to this secondary dispatch table by Make_Tags when its | |
3602 | -- unique external name was generated. | |
9dfe12ae | 3603 | |
17e14451 | 3604 | ------------------------------ |
3605 | -- Check_Premature_Freezing -- | |
3606 | ------------------------------ | |
3607 | ||
3608 | procedure Check_Premature_Freezing (Subp : Entity_Id; Typ : Entity_Id) is | |
3609 | begin | |
3610 | if Present (N) | |
3611 | and then Is_Private_Type (Typ) | |
3612 | and then No (Full_View (Typ)) | |
3613 | and then not Is_Generic_Type (Typ) | |
3614 | and then not Is_Tagged_Type (Typ) | |
3615 | and then not Is_Frozen (Typ) | |
3616 | then | |
3617 | Error_Msg_Sloc := Sloc (Subp); | |
503f7fd3 | 3618 | Error_Msg_NE |
17e14451 | 3619 | ("declaration must appear after completion of type &", N, Typ); |
3620 | Error_Msg_NE | |
3621 | ("\which is an untagged type in the profile of" | |
3622 | & " primitive operation & declared#", | |
3623 | N, Subp); | |
3624 | end if; | |
3625 | end Check_Premature_Freezing; | |
3626 | ||
24971415 | 3627 | --------------- |
3628 | -- Export_DT -- | |
3629 | --------------- | |
3630 | ||
f301a57b | 3631 | procedure Export_DT (Typ : Entity_Id; DT : Entity_Id; Index : Nat := 0) |
3632 | is | |
3633 | Count : Nat; | |
3634 | Elmt : Elmt_Id; | |
3635 | ||
24971415 | 3636 | begin |
3637 | Set_Is_Statically_Allocated (DT); | |
3638 | Set_Is_True_Constant (DT); | |
3639 | Set_Is_Exported (DT); | |
3640 | ||
f301a57b | 3641 | Count := 0; |
3642 | Elmt := First_Elmt (Dispatch_Table_Wrappers (Typ)); | |
3643 | while Count /= Index loop | |
3644 | Next_Elmt (Elmt); | |
3645 | Count := Count + 1; | |
3646 | end loop; | |
3647 | ||
3648 | pragma Assert (Related_Type (Node (Elmt)) = Typ); | |
3649 | ||
3650 | Get_External_Name | |
3651 | (Entity => Node (Elmt), | |
3652 | Has_Suffix => True); | |
3653 | ||
24971415 | 3654 | Set_Interface_Name (DT, |
3655 | Make_String_Literal (Loc, | |
3656 | Strval => String_From_Name_Buffer)); | |
3657 | ||
3658 | -- Ensure proper Sprint output of this implicit importation | |
3659 | ||
3660 | Set_Is_Internal (DT); | |
3661 | Set_Is_Public (DT); | |
3662 | end Export_DT; | |
3663 | ||
725a69d2 | 3664 | ----------------------- |
3665 | -- Make_Secondary_DT -- | |
3666 | ----------------------- | |
ee6ba406 | 3667 | |
725a69d2 | 3668 | procedure Make_Secondary_DT |
acf97c11 | 3669 | (Typ : Entity_Id; |
3670 | Iface : Entity_Id; | |
f301a57b | 3671 | Suffix_Index : Int; |
acf97c11 | 3672 | Num_Iface_Prims : Nat; |
3673 | Iface_DT_Ptr : Entity_Id; | |
3674 | Predef_Prims_Ptr : Entity_Id; | |
3675 | Build_Thunks : Boolean; | |
3676 | Result : List_Id) | |
725a69d2 | 3677 | is |
3678 | Loc : constant Source_Ptr := Sloc (Typ); | |
f301a57b | 3679 | Exporting_Table : constant Boolean := |
3680 | Building_Static_DT (Typ) | |
3681 | and then Suffix_Index > 0; | |
ec97ce79 | 3682 | Iface_DT : constant Entity_Id := Make_Temporary (Loc, 'T'); |
3683 | Predef_Prims : constant Entity_Id := Make_Temporary (Loc, 'R'); | |
725a69d2 | 3684 | DT_Constr_List : List_Id; |
3685 | DT_Aggr_List : List_Id; | |
3686 | Empty_DT : Boolean := False; | |
3687 | Nb_Predef_Prims : Nat := 0; | |
3688 | Nb_Prim : Nat; | |
3689 | New_Node : Node_Id; | |
3690 | OSD : Entity_Id; | |
3691 | OSD_Aggr_List : List_Id; | |
3692 | Pos : Nat; | |
3693 | Prim : Entity_Id; | |
3694 | Prim_Elmt : Elmt_Id; | |
3695 | Prim_Ops_Aggr_List : List_Id; | |
343d35dc | 3696 | |
725a69d2 | 3697 | begin |
17e14451 | 3698 | -- Handle cases in which we do not generate statically allocated |
3699 | -- dispatch tables. | |
343d35dc | 3700 | |
24971415 | 3701 | if not Building_Static_DT (Typ) then |
725a69d2 | 3702 | Set_Ekind (Predef_Prims, E_Variable); |
725a69d2 | 3703 | Set_Ekind (Iface_DT, E_Variable); |
343d35dc | 3704 | |
725a69d2 | 3705 | -- Statically allocated dispatch tables and related entities are |
3706 | -- constants. | |
343d35dc | 3707 | |
725a69d2 | 3708 | else |
3709 | Set_Ekind (Predef_Prims, E_Constant); | |
3710 | Set_Is_Statically_Allocated (Predef_Prims); | |
3711 | Set_Is_True_Constant (Predef_Prims); | |
343d35dc | 3712 | |
725a69d2 | 3713 | Set_Ekind (Iface_DT, E_Constant); |
3714 | Set_Is_Statically_Allocated (Iface_DT); | |
3715 | Set_Is_True_Constant (Iface_DT); | |
343d35dc | 3716 | end if; |
3717 | ||
f301a57b | 3718 | -- Calculate the number of slots of the dispatch table. If the number |
3719 | -- of primitives of Typ is 0 we reserve a dummy single entry for its | |
0c826ed4 | 3720 | -- DT because at run time the pointer to this dummy entry will be |
f301a57b | 3721 | -- used as the tag. |
68f95949 | 3722 | |
cdb1c38f | 3723 | if Num_Iface_Prims = 0 then |
725a69d2 | 3724 | Empty_DT := True; |
3725 | Nb_Prim := 1; | |
cdb1c38f | 3726 | else |
3727 | Nb_Prim := Num_Iface_Prims; | |
725a69d2 | 3728 | end if; |
76a1c25b | 3729 | |
725a69d2 | 3730 | -- Generate: |
952af0b9 | 3731 | |
725a69d2 | 3732 | -- Predef_Prims : Address_Array (1 .. Default_Prim_Ops_Count) := |
3733 | -- (predef-prim-op-thunk-1'address, | |
3734 | -- predef-prim-op-thunk-2'address, | |
3735 | -- ... | |
3736 | -- predef-prim-op-thunk-n'address); | |
3737 | -- for Predef_Prims'Alignment use Address'Alignment | |
952af0b9 | 3738 | |
725a69d2 | 3739 | -- Stage 1: Calculate the number of predefined primitives |
76a1c25b | 3740 | |
24971415 | 3741 | if not Building_Static_DT (Typ) then |
725a69d2 | 3742 | Nb_Predef_Prims := Max_Predef_Prims; |
3743 | else | |
3744 | Prim_Elmt := First_Elmt (Primitive_Operations (Typ)); | |
3745 | while Present (Prim_Elmt) loop | |
3746 | Prim := Node (Prim_Elmt); | |
aad6babd | 3747 | |
725a69d2 | 3748 | if Is_Predefined_Dispatching_Operation (Prim) |
3749 | and then not Is_Abstract_Subprogram (Prim) | |
3750 | then | |
3751 | Pos := UI_To_Int (DT_Position (Prim)); | |
aad6babd | 3752 | |
725a69d2 | 3753 | if Pos > Nb_Predef_Prims then |
3754 | Nb_Predef_Prims := Pos; | |
3755 | end if; | |
3756 | end if; | |
aad6babd | 3757 | |
725a69d2 | 3758 | Next_Elmt (Prim_Elmt); |
3759 | end loop; | |
3760 | end if; | |
aad6babd | 3761 | |
725a69d2 | 3762 | -- Stage 2: Create the thunks associated with the predefined |
3763 | -- primitives and save their entity to fill the aggregate. | |
ee6ba406 | 3764 | |
725a69d2 | 3765 | declare |
3766 | Prim_Table : array (Nat range 1 .. Nb_Predef_Prims) of Entity_Id; | |
cc60bd16 | 3767 | Decl : Node_Id; |
725a69d2 | 3768 | Thunk_Id : Entity_Id; |
3769 | Thunk_Code : Node_Id; | |
aad6babd | 3770 | |
725a69d2 | 3771 | begin |
3772 | Prim_Ops_Aggr_List := New_List; | |
3773 | Prim_Table := (others => Empty); | |
aad6babd | 3774 | |
cdb1c38f | 3775 | if Building_Static_DT (Typ) then |
3776 | Prim_Elmt := First_Elmt (Primitive_Operations (Typ)); | |
3777 | while Present (Prim_Elmt) loop | |
3778 | Prim := Node (Prim_Elmt); | |
aad6babd | 3779 | |
cdb1c38f | 3780 | if Is_Predefined_Dispatching_Operation (Prim) |
3781 | and then not Is_Abstract_Subprogram (Prim) | |
3f8cf2d2 | 3782 | and then not Is_Eliminated (Prim) |
cdb1c38f | 3783 | and then not Present (Prim_Table |
3784 | (UI_To_Int (DT_Position (Prim)))) | |
3785 | then | |
3786 | if not Build_Thunks then | |
3787 | Prim_Table (UI_To_Int (DT_Position (Prim))) := | |
3788 | Alias (Prim); | |
aad6babd | 3789 | |
cdb1c38f | 3790 | else |
fc2907f6 | 3791 | Expand_Interface_Thunk |
3792 | (Ultimate_Alias (Prim), Thunk_Id, Thunk_Code); | |
aad6babd | 3793 | |
cdb1c38f | 3794 | if Present (Thunk_Id) then |
3795 | Append_To (Result, Thunk_Code); | |
3796 | Prim_Table (UI_To_Int (DT_Position (Prim))) | |
3797 | := Thunk_Id; | |
3798 | end if; | |
3799 | end if; | |
725a69d2 | 3800 | end if; |
aad6babd | 3801 | |
cdb1c38f | 3802 | Next_Elmt (Prim_Elmt); |
3803 | end loop; | |
3804 | end if; | |
aad6babd | 3805 | |
725a69d2 | 3806 | for J in Prim_Table'Range loop |
3807 | if Present (Prim_Table (J)) then | |
3808 | New_Node := | |
cc60bd16 | 3809 | Unchecked_Convert_To (RTE (RE_Prim_Ptr), |
acf97c11 | 3810 | Make_Attribute_Reference (Loc, |
3811 | Prefix => New_Reference_To (Prim_Table (J), Loc), | |
3812 | Attribute_Name => Name_Unrestricted_Access)); | |
725a69d2 | 3813 | else |
cc60bd16 | 3814 | New_Node := Make_Null (Loc); |
725a69d2 | 3815 | end if; |
952af0b9 | 3816 | |
725a69d2 | 3817 | Append_To (Prim_Ops_Aggr_List, New_Node); |
3818 | end loop; | |
952af0b9 | 3819 | |
cc60bd16 | 3820 | New_Node := |
3821 | Make_Aggregate (Loc, | |
3822 | Expressions => Prim_Ops_Aggr_List); | |
3823 | ||
3824 | -- Remember aggregates initializing dispatch tables | |
3825 | ||
3826 | Append_Elmt (New_Node, DT_Aggr); | |
3827 | ||
3828 | Decl := | |
3829 | Make_Subtype_Declaration (Loc, | |
ec97ce79 | 3830 | Defining_Identifier => Make_Temporary (Loc, 'S'), |
3831 | Subtype_Indication => | |
cc60bd16 | 3832 | New_Reference_To (RTE (RE_Address_Array), Loc)); |
3833 | ||
3834 | Append_To (Result, Decl); | |
3835 | ||
725a69d2 | 3836 | Append_To (Result, |
3837 | Make_Object_Declaration (Loc, | |
3838 | Defining_Identifier => Predef_Prims, | |
24971415 | 3839 | Constant_Present => Building_Static_DT (Typ), |
725a69d2 | 3840 | Aliased_Present => True, |
cc60bd16 | 3841 | Object_Definition => New_Reference_To |
3842 | (Defining_Identifier (Decl), Loc), | |
3843 | Expression => New_Node)); | |
aad6babd | 3844 | |
725a69d2 | 3845 | Append_To (Result, |
3846 | Make_Attribute_Definition_Clause (Loc, | |
3847 | Name => New_Reference_To (Predef_Prims, Loc), | |
3848 | Chars => Name_Alignment, | |
3849 | Expression => | |
3850 | Make_Attribute_Reference (Loc, | |
3851 | Prefix => | |
3852 | New_Reference_To (RTE (RE_Integer_Address), Loc), | |
3853 | Attribute_Name => Name_Alignment))); | |
3854 | end; | |
aad6babd | 3855 | |
725a69d2 | 3856 | -- Generate |
76a1c25b | 3857 | |
725a69d2 | 3858 | -- OSD : Ada.Tags.Object_Specific_Data (Nb_Prims) := |
3859 | -- (OSD_Table => (1 => <value>, | |
3860 | -- ... | |
3861 | -- N => <value>)); | |
76a1c25b | 3862 | |
725a69d2 | 3863 | -- Iface_DT : Dispatch_Table (Nb_Prims) := |
3864 | -- ([ Signature => <sig-value> ], | |
3865 | -- Tag_Kind => <tag_kind-value>, | |
3866 | -- Predef_Prims => Predef_Prims'Address, | |
3867 | -- Offset_To_Top => 0, | |
3868 | -- OSD => OSD'Address, | |
3869 | -- Prims_Ptr => (prim-op-1'address, | |
3870 | -- prim-op-2'address, | |
3871 | -- ... | |
3872 | -- prim-op-n'address)); | |
f301a57b | 3873 | -- for Iface_DT'Alignment use Address'Alignment; |
76a1c25b | 3874 | |
725a69d2 | 3875 | -- Stage 3: Initialize the discriminant and the record components |
aad6babd | 3876 | |
725a69d2 | 3877 | DT_Constr_List := New_List; |
3878 | DT_Aggr_List := New_List; | |
343d35dc | 3879 | |
725a69d2 | 3880 | -- Nb_Prim. If the tagged type has no primitives we add a dummy |
3881 | -- slot whose address will be the tag of this type. | |
343d35dc | 3882 | |
725a69d2 | 3883 | if Nb_Prim = 0 then |
3884 | New_Node := Make_Integer_Literal (Loc, 1); | |
3885 | else | |
3886 | New_Node := Make_Integer_Literal (Loc, Nb_Prim); | |
3887 | end if; | |
343d35dc | 3888 | |
725a69d2 | 3889 | Append_To (DT_Constr_List, New_Node); |
3890 | Append_To (DT_Aggr_List, New_Copy (New_Node)); | |
343d35dc | 3891 | |
725a69d2 | 3892 | -- Signature |
343d35dc | 3893 | |
725a69d2 | 3894 | if RTE_Record_Component_Available (RE_Signature) then |
3895 | Append_To (DT_Aggr_List, | |
3896 | New_Reference_To (RTE (RE_Secondary_DT), Loc)); | |
3897 | end if; | |
343d35dc | 3898 | |
725a69d2 | 3899 | -- Tag_Kind |
343d35dc | 3900 | |
725a69d2 | 3901 | if RTE_Record_Component_Available (RE_Tag_Kind) then |
3902 | Append_To (DT_Aggr_List, Tagged_Kind (Typ)); | |
3903 | end if; | |
aad6babd | 3904 | |
725a69d2 | 3905 | -- Predef_Prims |
aad6babd | 3906 | |
725a69d2 | 3907 | Append_To (DT_Aggr_List, |
3908 | Make_Attribute_Reference (Loc, | |
3909 | Prefix => New_Reference_To (Predef_Prims, Loc), | |
3910 | Attribute_Name => Name_Address)); | |
aad6babd | 3911 | |
725a69d2 | 3912 | -- Note: The correct value of Offset_To_Top will be set by the init |
3913 | -- subprogram | |
aad6babd | 3914 | |
725a69d2 | 3915 | Append_To (DT_Aggr_List, Make_Integer_Literal (Loc, 0)); |
aad6babd | 3916 | |
725a69d2 | 3917 | -- Generate the Object Specific Data table required to dispatch calls |
3918 | -- through synchronized interfaces. | |
aad6babd | 3919 | |
725a69d2 | 3920 | if Empty_DT |
3921 | or else Is_Abstract_Type (Typ) | |
3922 | or else Is_Controlled (Typ) | |
3923 | or else Restriction_Active (No_Dispatching_Calls) | |
3924 | or else not Is_Limited_Type (Typ) | |
a652dd51 | 3925 | or else not Has_Interfaces (Typ) |
cdb1c38f | 3926 | or else not Build_Thunks |
38d2fa31 | 3927 | or else not RTE_Record_Component_Available (RE_OSD_Table) |
725a69d2 | 3928 | then |
3929 | -- No OSD table required | |
ee6ba406 | 3930 | |
725a69d2 | 3931 | Append_To (DT_Aggr_List, |
3932 | New_Reference_To (RTE (RE_Null_Address), Loc)); | |
d62940bf | 3933 | |
725a69d2 | 3934 | else |
3935 | OSD_Aggr_List := New_List; | |
d62940bf | 3936 | |
725a69d2 | 3937 | declare |
3938 | Prim_Table : array (Nat range 1 .. Nb_Prim) of Entity_Id; | |
3939 | Prim : Entity_Id; | |
3940 | Prim_Alias : Entity_Id; | |
3941 | Prim_Elmt : Elmt_Id; | |
3942 | E : Entity_Id; | |
3943 | Count : Nat := 0; | |
3944 | Pos : Nat; | |
d62940bf | 3945 | |
725a69d2 | 3946 | begin |
3947 | Prim_Table := (others => Empty); | |
3948 | Prim_Alias := Empty; | |
d62940bf | 3949 | |
725a69d2 | 3950 | Prim_Elmt := First_Elmt (Primitive_Operations (Typ)); |
3951 | while Present (Prim_Elmt) loop | |
3952 | Prim := Node (Prim_Elmt); | |
d62940bf | 3953 | |
a652dd51 | 3954 | if Present (Interface_Alias (Prim)) |
725a69d2 | 3955 | and then Find_Dispatching_Type |
a652dd51 | 3956 | (Interface_Alias (Prim)) = Iface |
725a69d2 | 3957 | then |
a652dd51 | 3958 | Prim_Alias := Interface_Alias (Prim); |
fc2907f6 | 3959 | E := Ultimate_Alias (Prim); |
725a69d2 | 3960 | Pos := UI_To_Int (DT_Position (Prim_Alias)); |
68f95949 | 3961 | |
725a69d2 | 3962 | if Present (Prim_Table (Pos)) then |
3963 | pragma Assert (Prim_Table (Pos) = E); | |
3964 | null; | |
68f95949 | 3965 | |
725a69d2 | 3966 | else |
3967 | Prim_Table (Pos) := E; | |
3968 | ||
3969 | Append_To (OSD_Aggr_List, | |
3970 | Make_Component_Association (Loc, | |
3971 | Choices => New_List ( | |
3972 | Make_Integer_Literal (Loc, | |
3973 | DT_Position (Prim_Alias))), | |
3974 | Expression => | |
3975 | Make_Integer_Literal (Loc, | |
3976 | DT_Position (Alias (Prim))))); | |
3977 | ||
3978 | Count := Count + 1; | |
3979 | end if; | |
3980 | end if; | |
3981 | ||
3982 | Next_Elmt (Prim_Elmt); | |
3983 | end loop; | |
3984 | pragma Assert (Count = Nb_Prim); | |
3985 | end; | |
3986 | ||
ec97ce79 | 3987 | OSD := Make_Temporary (Loc, 'I'); |
725a69d2 | 3988 | |
3989 | Append_To (Result, | |
3990 | Make_Object_Declaration (Loc, | |
3991 | Defining_Identifier => OSD, | |
3992 | Object_Definition => | |
3993 | Make_Subtype_Indication (Loc, | |
3994 | Subtype_Mark => | |
3995 | New_Reference_To (RTE (RE_Object_Specific_Data), Loc), | |
3996 | Constraint => | |
3997 | Make_Index_Or_Discriminant_Constraint (Loc, | |
3998 | Constraints => New_List ( | |
3999 | Make_Integer_Literal (Loc, Nb_Prim)))), | |
725a69d2 | 4000 | |
ec97ce79 | 4001 | Expression => |
4002 | Make_Aggregate (Loc, | |
4003 | Component_Associations => New_List ( | |
4004 | Make_Component_Association (Loc, | |
4005 | Choices => New_List ( | |
4006 | New_Occurrence_Of | |
4007 | (RTE_Record_Component (RE_OSD_Num_Prims), Loc)), | |
4008 | Expression => | |
4009 | Make_Integer_Literal (Loc, Nb_Prim)), | |
4010 | ||
4011 | Make_Component_Association (Loc, | |
4012 | Choices => New_List ( | |
4013 | New_Occurrence_Of | |
4014 | (RTE_Record_Component (RE_OSD_Table), Loc)), | |
4015 | Expression => Make_Aggregate (Loc, | |
4016 | Component_Associations => OSD_Aggr_List)))))); | |
725a69d2 | 4017 | |
17e14451 | 4018 | Append_To (Result, |
4019 | Make_Attribute_Definition_Clause (Loc, | |
4020 | Name => New_Reference_To (OSD, Loc), | |
4021 | Chars => Name_Alignment, | |
4022 | Expression => | |
4023 | Make_Attribute_Reference (Loc, | |
4024 | Prefix => | |
4025 | New_Reference_To (RTE (RE_Integer_Address), Loc), | |
4026 | Attribute_Name => Name_Alignment))); | |
4027 | ||
725a69d2 | 4028 | -- In secondary dispatch tables the Typeinfo component contains |
4029 | -- the address of the Object Specific Data (see a-tags.ads) | |
4030 | ||
4031 | Append_To (DT_Aggr_List, | |
4032 | Make_Attribute_Reference (Loc, | |
4033 | Prefix => New_Reference_To (OSD, Loc), | |
4034 | Attribute_Name => Name_Address)); | |
4035 | end if; | |
4036 | ||
4037 | -- Initialize the table of primitive operations | |
4038 | ||
4039 | Prim_Ops_Aggr_List := New_List; | |
4040 | ||
4041 | if Empty_DT then | |
cc60bd16 | 4042 | Append_To (Prim_Ops_Aggr_List, Make_Null (Loc)); |
725a69d2 | 4043 | |
4044 | elsif Is_Abstract_Type (Typ) | |
9a479e51 | 4045 | or else not Building_Static_DT (Typ) |
725a69d2 | 4046 | then |
4047 | for J in 1 .. Nb_Prim loop | |
cc60bd16 | 4048 | Append_To (Prim_Ops_Aggr_List, Make_Null (Loc)); |
725a69d2 | 4049 | end loop; |
4050 | ||
4051 | else | |
4052 | declare | |
d00681a7 | 4053 | CPP_Nb_Prims : constant Nat := CPP_Num_Prims (Typ); |
4054 | E : Entity_Id; | |
4055 | Prim_Pos : Nat; | |
4056 | Prim_Table : array (Nat range 1 .. Nb_Prim) of Entity_Id; | |
4057 | Thunk_Code : Node_Id; | |
4058 | Thunk_Id : Entity_Id; | |
725a69d2 | 4059 | |
4060 | begin | |
4061 | Prim_Table := (others => Empty); | |
4062 | ||
4063 | Prim_Elmt := First_Elmt (Primitive_Operations (Typ)); | |
4064 | while Present (Prim_Elmt) loop | |
d00681a7 | 4065 | Prim := Node (Prim_Elmt); |
4066 | E := Ultimate_Alias (Prim); | |
4067 | Prim_Pos := UI_To_Int (DT_Position (E)); | |
725a69d2 | 4068 | |
d00681a7 | 4069 | -- Do not reference predefined primitives because they are |
4070 | -- located in a separate dispatch table; skip abstract and | |
4071 | -- eliminated primitives; skip primitives located in the C++ | |
4072 | -- part of the dispatch table because their slot is set by | |
4073 | -- the IC routine. | |
3f8cf2d2 | 4074 | |
725a69d2 | 4075 | if not Is_Predefined_Dispatching_Operation (Prim) |
a652dd51 | 4076 | and then Present (Interface_Alias (Prim)) |
725a69d2 | 4077 | and then not Is_Abstract_Subprogram (Alias (Prim)) |
3f8cf2d2 | 4078 | and then not Is_Eliminated (Alias (Prim)) |
d00681a7 | 4079 | and then (not Is_CPP_Class (Root_Type (Typ)) |
4080 | or else Prim_Pos > CPP_Nb_Prims) | |
725a69d2 | 4081 | and then Find_Dispatching_Type |
a652dd51 | 4082 | (Interface_Alias (Prim)) = Iface |
725a69d2 | 4083 | |
4084 | -- Generate the code of the thunk only if the abstract | |
4085 | -- interface type is not an immediate ancestor of | |
d00681a7 | 4086 | -- Tagged_Type. Otherwise the DT associated with the |
725a69d2 | 4087 | -- interface is the primary DT. |
4088 | ||
a652dd51 | 4089 | and then not Is_Ancestor (Iface, Typ) |
725a69d2 | 4090 | then |
cdb1c38f | 4091 | if not Build_Thunks then |
d00681a7 | 4092 | Prim_Pos := |
a652dd51 | 4093 | UI_To_Int (DT_Position (Interface_Alias (Prim))); |
d00681a7 | 4094 | Prim_Table (Prim_Pos) := Alias (Prim); |
4095 | ||
cdb1c38f | 4096 | else |
4097 | Expand_Interface_Thunk (Prim, Thunk_Id, Thunk_Code); | |
725a69d2 | 4098 | |
cdb1c38f | 4099 | if Present (Thunk_Id) then |
d00681a7 | 4100 | Prim_Pos := |
a652dd51 | 4101 | UI_To_Int (DT_Position (Interface_Alias (Prim))); |
cdb1c38f | 4102 | |
d00681a7 | 4103 | Prim_Table (Prim_Pos) := Thunk_Id; |
cdb1c38f | 4104 | Append_To (Result, Thunk_Code); |
4105 | end if; | |
725a69d2 | 4106 | end if; |
4107 | end if; | |
4108 | ||
4109 | Next_Elmt (Prim_Elmt); | |
4110 | end loop; | |
4111 | ||
4112 | for J in Prim_Table'Range loop | |
4113 | if Present (Prim_Table (J)) then | |
4114 | New_Node := | |
cc60bd16 | 4115 | Unchecked_Convert_To (RTE (RE_Prim_Ptr), |
acf97c11 | 4116 | Make_Attribute_Reference (Loc, |
4117 | Prefix => New_Reference_To (Prim_Table (J), Loc), | |
4118 | Attribute_Name => Name_Unrestricted_Access)); | |
d00681a7 | 4119 | |
725a69d2 | 4120 | else |
cc60bd16 | 4121 | New_Node := Make_Null (Loc); |
725a69d2 | 4122 | end if; |
4123 | ||
4124 | Append_To (Prim_Ops_Aggr_List, New_Node); | |
4125 | end loop; | |
4126 | end; | |
4127 | end if; | |
4128 | ||
cc60bd16 | 4129 | New_Node := |
725a69d2 | 4130 | Make_Aggregate (Loc, |
cc60bd16 | 4131 | Expressions => Prim_Ops_Aggr_List); |
4132 | ||
4133 | Append_To (DT_Aggr_List, New_Node); | |
4134 | ||
4135 | -- Remember aggregates initializing dispatch tables | |
4136 | ||
4137 | Append_Elmt (New_Node, DT_Aggr); | |
725a69d2 | 4138 | |
f301a57b | 4139 | -- Note: Secondary dispatch tables cannot be declared constant |
4140 | -- because the component Offset_To_Top is currently initialized | |
4141 | -- by the IP routine. | |
4142 | ||
725a69d2 | 4143 | Append_To (Result, |
4144 | Make_Object_Declaration (Loc, | |
4145 | Defining_Identifier => Iface_DT, | |
4146 | Aliased_Present => True, | |
f301a57b | 4147 | Constant_Present => False, |
4148 | ||
725a69d2 | 4149 | Object_Definition => |
4150 | Make_Subtype_Indication (Loc, | |
4151 | Subtype_Mark => New_Reference_To | |
4152 | (RTE (RE_Dispatch_Table_Wrapper), Loc), | |
4153 | Constraint => Make_Index_Or_Discriminant_Constraint (Loc, | |
4154 | Constraints => DT_Constr_List)), | |
4155 | ||
f301a57b | 4156 | Expression => |
4157 | Make_Aggregate (Loc, | |
4158 | Expressions => DT_Aggr_List))); | |
725a69d2 | 4159 | |
17e14451 | 4160 | Append_To (Result, |
4161 | Make_Attribute_Definition_Clause (Loc, | |
4162 | Name => New_Reference_To (Iface_DT, Loc), | |
4163 | Chars => Name_Alignment, | |
f301a57b | 4164 | |
17e14451 | 4165 | Expression => |
4166 | Make_Attribute_Reference (Loc, | |
f301a57b | 4167 | Prefix => |
17e14451 | 4168 | New_Reference_To (RTE (RE_Integer_Address), Loc), |
4169 | Attribute_Name => Name_Alignment))); | |
4170 | ||
f301a57b | 4171 | if Exporting_Table then |
4172 | Export_DT (Typ, Iface_DT, Suffix_Index); | |
4173 | ||
725a69d2 | 4174 | -- Generate code to create the pointer to the dispatch table |
4175 | ||
f301a57b | 4176 | -- Iface_DT_Ptr : Tag := Tag!(DT.Prims_Ptr'Address); |
725a69d2 | 4177 | |
f301a57b | 4178 | -- Note: This declaration is not added here if the table is exported |
4179 | -- because in such case Make_Tags has already added this declaration. | |
4180 | ||
4181 | else | |
4182 | Append_To (Result, | |
4183 | Make_Object_Declaration (Loc, | |
4184 | Defining_Identifier => Iface_DT_Ptr, | |
4185 | Constant_Present => True, | |
4186 | ||
4187 | Object_Definition => | |
4188 | New_Reference_To (RTE (RE_Interface_Tag), Loc), | |
4189 | ||
4190 | Expression => | |
4191 | Unchecked_Convert_To (RTE (RE_Interface_Tag), | |
4192 | Make_Attribute_Reference (Loc, | |
4193 | Prefix => | |
4194 | Make_Selected_Component (Loc, | |
4195 | Prefix => New_Reference_To (Iface_DT, Loc), | |
4196 | Selector_Name => | |
4197 | New_Occurrence_Of | |
4198 | (RTE_Record_Component (RE_Prims_Ptr), Loc)), | |
4199 | Attribute_Name => Name_Address)))); | |
4200 | end if; | |
725a69d2 | 4201 | |
acf97c11 | 4202 | Append_To (Result, |
4203 | Make_Object_Declaration (Loc, | |
4204 | Defining_Identifier => Predef_Prims_Ptr, | |
4205 | Constant_Present => True, | |
f301a57b | 4206 | |
4207 | Object_Definition => | |
acf97c11 | 4208 | New_Reference_To (RTE (RE_Address), Loc), |
f301a57b | 4209 | |
4210 | Expression => | |
acf97c11 | 4211 | Make_Attribute_Reference (Loc, |
f301a57b | 4212 | Prefix => |
acf97c11 | 4213 | Make_Selected_Component (Loc, |
f301a57b | 4214 | Prefix => New_Reference_To (Iface_DT, Loc), |
4215 | Selector_Name => | |
4216 | New_Occurrence_Of | |
4217 | (RTE_Record_Component (RE_Predef_Prims), Loc)), | |
acf97c11 | 4218 | Attribute_Name => Name_Address))); |
4219 | ||
cc60bd16 | 4220 | -- Remember entities containing dispatch tables |
acf97c11 | 4221 | |
cc60bd16 | 4222 | Append_Elmt (Predef_Prims, DT_Decl); |
4223 | Append_Elmt (Iface_DT, DT_Decl); | |
725a69d2 | 4224 | end Make_Secondary_DT; |
4225 | ||
4226 | -- Local variables | |
4227 | ||
2ea346ac | 4228 | Elab_Code : constant List_Id := New_List; |
4229 | Result : constant List_Id := New_List; | |
4230 | Tname : constant Name_Id := Chars (Typ); | |
725a69d2 | 4231 | AI : Elmt_Id; |
cdb1c38f | 4232 | AI_Tag_Elmt : Elmt_Id; |
24971415 | 4233 | AI_Tag_Comp : Elmt_Id; |
f9162257 | 4234 | DT_Aggr_List : List_Id; |
24971415 | 4235 | DT_Constr_List : List_Id; |
725a69d2 | 4236 | DT_Ptr : Entity_Id; |
725a69d2 | 4237 | ITable : Node_Id; |
4238 | I_Depth : Nat := 0; | |
4239 | Iface_Table_Node : Node_Id; | |
4240 | Name_ITable : Name_Id; | |
725a69d2 | 4241 | Nb_Predef_Prims : Nat := 0; |
4242 | Nb_Prim : Nat := 0; | |
4243 | New_Node : Node_Id; | |
725a69d2 | 4244 | Num_Ifaces : Nat := 0; |
cc60bd16 | 4245 | Parent_Typ : Entity_Id; |
725a69d2 | 4246 | Prim : Entity_Id; |
4247 | Prim_Elmt : Elmt_Id; | |
4248 | Prim_Ops_Aggr_List : List_Id; | |
725a69d2 | 4249 | Suffix_Index : Int; |
4250 | Typ_Comps : Elist_Id; | |
4251 | Typ_Ifaces : Elist_Id; | |
4252 | TSD_Aggr_List : List_Id; | |
4253 | TSD_Tags_List : List_Id; | |
17e14451 | 4254 | |
4255 | -- The following name entries are used by Make_DT to generate a number | |
4256 | -- of entities related to a tagged type. These entities may be generated | |
4257 | -- in a scope other than that of the tagged type declaration, and if | |
4258 | -- the entities for two tagged types with the same name happen to be | |
4259 | -- generated in the same scope, we have to take care to use different | |
4260 | -- names. This is achieved by means of a unique serial number appended | |
4261 | -- to each generated entity name. | |
4262 | ||
4263 | Name_DT : constant Name_Id := | |
4264 | New_External_Name (Tname, 'T', Suffix_Index => -1); | |
4265 | Name_Exname : constant Name_Id := | |
4266 | New_External_Name (Tname, 'E', Suffix_Index => -1); | |
e7e688dd | 4267 | Name_HT_Link : constant Name_Id := |
4268 | New_External_Name (Tname, 'H', Suffix_Index => -1); | |
17e14451 | 4269 | Name_Predef_Prims : constant Name_Id := |
4270 | New_External_Name (Tname, 'R', Suffix_Index => -1); | |
4271 | Name_SSD : constant Name_Id := | |
4272 | New_External_Name (Tname, 'S', Suffix_Index => -1); | |
4273 | Name_TSD : constant Name_Id := | |
4274 | New_External_Name (Tname, 'B', Suffix_Index => -1); | |
4275 | ||
4276 | -- Entities built with above names | |
4277 | ||
4278 | DT : constant Entity_Id := | |
4279 | Make_Defining_Identifier (Loc, Name_DT); | |
4280 | Exname : constant Entity_Id := | |
4281 | Make_Defining_Identifier (Loc, Name_Exname); | |
e7e688dd | 4282 | HT_Link : constant Entity_Id := |
4283 | Make_Defining_Identifier (Loc, Name_HT_Link); | |
17e14451 | 4284 | Predef_Prims : constant Entity_Id := |
4285 | Make_Defining_Identifier (Loc, Name_Predef_Prims); | |
4286 | SSD : constant Entity_Id := | |
4287 | Make_Defining_Identifier (Loc, Name_SSD); | |
4288 | TSD : constant Entity_Id := | |
4289 | Make_Defining_Identifier (Loc, Name_TSD); | |
725a69d2 | 4290 | |
4291 | -- Start of processing for Make_DT | |
4292 | ||
4293 | begin | |
17e14451 | 4294 | pragma Assert (Is_Frozen (Typ)); |
725a69d2 | 4295 | |
17e14451 | 4296 | -- Handle cases in which there is no need to build the dispatch table |
725a69d2 | 4297 | |
17e14451 | 4298 | if Has_Dispatch_Table (Typ) |
4299 | or else No (Access_Disp_Table (Typ)) | |
4300 | or else Is_CPP_Class (Typ) | |
b46aca2b | 4301 | or else Convention (Typ) = Convention_CIL |
4302 | or else Convention (Typ) = Convention_Java | |
17e14451 | 4303 | then |
725a69d2 | 4304 | return Result; |
725a69d2 | 4305 | |
17e14451 | 4306 | elsif No_Run_Time_Mode then |
4307 | Error_Msg_CRT ("tagged types", Typ); | |
4308 | return Result; | |
725a69d2 | 4309 | |
17e14451 | 4310 | elsif not RTE_Available (RE_Tag) then |
725a69d2 | 4311 | Append_To (Result, |
4312 | Make_Object_Declaration (Loc, | |
17e14451 | 4313 | Defining_Identifier => Node (First_Elmt |
4314 | (Access_Disp_Table (Typ))), | |
725a69d2 | 4315 | Object_Definition => New_Reference_To (RTE (RE_Tag), Loc), |
4316 | Constant_Present => True, | |
4317 | Expression => | |
24971415 | 4318 | Unchecked_Convert_To (RTE (RE_Tag), |
725a69d2 | 4319 | New_Reference_To (RTE (RE_Null_Address), Loc)))); |
4320 | ||
4321 | Analyze_List (Result, Suppress => All_Checks); | |
4322 | Error_Msg_CRT ("tagged types", Typ); | |
4323 | return Result; | |
4324 | end if; | |
4325 | ||
17e14451 | 4326 | -- Ensure that the value of Max_Predef_Prims defined in a-tags is |
cdb1c38f | 4327 | -- correct. Valid values are 10 under configurable runtime or 16 |
17e14451 | 4328 | -- with full runtime. |
4329 | ||
4330 | if RTE_Available (RE_Interface_Data) then | |
cdb1c38f | 4331 | if Max_Predef_Prims /= 16 then |
17e14451 | 4332 | Error_Msg_N ("run-time library configuration error", Typ); |
4333 | return Result; | |
4334 | end if; | |
725a69d2 | 4335 | else |
17e14451 | 4336 | if Max_Predef_Prims /= 10 then |
4337 | Error_Msg_N ("run-time library configuration error", Typ); | |
4338 | Error_Msg_CRT ("tagged types", Typ); | |
4339 | return Result; | |
4340 | end if; | |
725a69d2 | 4341 | end if; |
4342 | ||
cc60bd16 | 4343 | -- Initialize Parent_Typ handling private types |
4344 | ||
4345 | Parent_Typ := Etype (Typ); | |
4346 | ||
4347 | if Present (Full_View (Parent_Typ)) then | |
4348 | Parent_Typ := Full_View (Parent_Typ); | |
4349 | end if; | |
4350 | ||
17e14451 | 4351 | -- Ensure that all the primitives are frozen. This is only required when |
4352 | -- building static dispatch tables --- the primitives must be frozen to | |
4353 | -- be referenced (otherwise we have problems with the backend). It is | |
4354 | -- not a requirement with nonstatic dispatch tables because in this case | |
4355 | -- we generate now an empty dispatch table; the extra code required to | |
24971415 | 4356 | -- register the primitives in the slots will be generated later --- when |
17e14451 | 4357 | -- each primitive is frozen (see Freeze_Subprogram). |
725a69d2 | 4358 | |
d00681a7 | 4359 | if Building_Static_DT (Typ) then |
17e14451 | 4360 | declare |
4361 | Save : constant Boolean := Freezing_Library_Level_Tagged_Type; | |
555c63a6 | 4362 | Prim : Entity_Id; |
17e14451 | 4363 | Prim_Elmt : Elmt_Id; |
4364 | Frnodes : List_Id; | |
725a69d2 | 4365 | |
17e14451 | 4366 | begin |
4367 | Freezing_Library_Level_Tagged_Type := True; | |
555c63a6 | 4368 | |
17e14451 | 4369 | Prim_Elmt := First_Elmt (Primitive_Operations (Typ)); |
4370 | while Present (Prim_Elmt) loop | |
555c63a6 | 4371 | Prim := Node (Prim_Elmt); |
d74fc39a | 4372 | Frnodes := Freeze_Entity (Prim, Typ); |
725a69d2 | 4373 | |
17e14451 | 4374 | declare |
17e14451 | 4375 | F : Entity_Id; |
725a69d2 | 4376 | |
17e14451 | 4377 | begin |
555c63a6 | 4378 | F := First_Formal (Prim); |
17e14451 | 4379 | while Present (F) loop |
555c63a6 | 4380 | Check_Premature_Freezing (Prim, Etype (F)); |
17e14451 | 4381 | Next_Formal (F); |
4382 | end loop; | |
4383 | ||
555c63a6 | 4384 | Check_Premature_Freezing (Prim, Etype (Prim)); |
17e14451 | 4385 | end; |
4386 | ||
4387 | if Present (Frnodes) then | |
4388 | Append_List_To (Result, Frnodes); | |
4389 | end if; | |
4390 | ||
4391 | Next_Elmt (Prim_Elmt); | |
4392 | end loop; | |
555c63a6 | 4393 | |
17e14451 | 4394 | Freezing_Library_Level_Tagged_Type := Save; |
4395 | end; | |
4396 | end if; | |
725a69d2 | 4397 | |
17e14451 | 4398 | -- Ada 2005 (AI-251): Build the secondary dispatch tables |
4399 | ||
a652dd51 | 4400 | if Has_Interfaces (Typ) then |
17e14451 | 4401 | Collect_Interface_Components (Typ, Typ_Comps); |
4402 | ||
f301a57b | 4403 | -- Each secondary dispatch table is assigned an unique positive |
4404 | -- suffix index; such value also corresponds with the location of | |
4405 | -- its entity in the Dispatch_Table_Wrappers list (see Make_Tags). | |
4406 | ||
4407 | -- Note: This value must be kept sync with the Suffix_Index values | |
4408 | -- generated by Make_Tags | |
4409 | ||
4410 | Suffix_Index := 1; | |
acf97c11 | 4411 | AI_Tag_Elmt := |
4412 | Next_Elmt (Next_Elmt (First_Elmt (Access_Disp_Table (Typ)))); | |
17e14451 | 4413 | |
4414 | AI_Tag_Comp := First_Elmt (Typ_Comps); | |
4415 | while Present (AI_Tag_Comp) loop | |
d00681a7 | 4416 | pragma Assert (Has_Suffix (Node (AI_Tag_Elmt), 'P')); |
cdb1c38f | 4417 | |
4418 | -- Build the secondary table containing pointers to thunks | |
4419 | ||
17e14451 | 4420 | Make_Secondary_DT |
cdb1c38f | 4421 | (Typ => Typ, |
4422 | Iface => Base_Type (Related_Type (Node (AI_Tag_Comp))), | |
f301a57b | 4423 | Suffix_Index => Suffix_Index, |
cdb1c38f | 4424 | Num_Iface_Prims => UI_To_Int |
4425 | (DT_Entry_Count (Node (AI_Tag_Comp))), | |
4426 | Iface_DT_Ptr => Node (AI_Tag_Elmt), | |
acf97c11 | 4427 | Predef_Prims_Ptr => Node (Next_Elmt (AI_Tag_Elmt)), |
cdb1c38f | 4428 | Build_Thunks => True, |
4429 | Result => Result); | |
cdb1c38f | 4430 | |
d00681a7 | 4431 | -- Skip secondary dispatch table referencing thunks to predefined |
4432 | -- primitives. | |
acf97c11 | 4433 | |
f301a57b | 4434 | Next_Elmt (AI_Tag_Elmt); |
d00681a7 | 4435 | pragma Assert (Has_Suffix (Node (AI_Tag_Elmt), 'Y')); |
4436 | ||
4437 | -- Secondary dispatch table referencing user-defined primitives | |
4438 | -- covered by this interface. | |
4439 | ||
acf97c11 | 4440 | Next_Elmt (AI_Tag_Elmt); |
d00681a7 | 4441 | pragma Assert (Has_Suffix (Node (AI_Tag_Elmt), 'D')); |
acf97c11 | 4442 | |
36b938a3 | 4443 | -- Build the secondary table containing pointers to primitives |
cdb1c38f | 4444 | -- (used to give support to Generic Dispatching Constructors). |
4445 | ||
4446 | Make_Secondary_DT | |
d00681a7 | 4447 | (Typ => Typ, |
4448 | Iface => Base_Type | |
4449 | (Related_Type (Node (AI_Tag_Comp))), | |
4450 | Suffix_Index => -1, | |
4451 | Num_Iface_Prims => UI_To_Int | |
4452 | (DT_Entry_Count (Node (AI_Tag_Comp))), | |
4453 | Iface_DT_Ptr => Node (AI_Tag_Elmt), | |
4454 | Predef_Prims_Ptr => Node (Next_Elmt (AI_Tag_Elmt)), | |
4455 | Build_Thunks => False, | |
4456 | Result => Result); | |
4457 | ||
4458 | -- Skip secondary dispatch table referencing predefined primitives | |
acf97c11 | 4459 | |
f301a57b | 4460 | Next_Elmt (AI_Tag_Elmt); |
d00681a7 | 4461 | pragma Assert (Has_Suffix (Node (AI_Tag_Elmt), 'Z')); |
acf97c11 | 4462 | |
17e14451 | 4463 | Suffix_Index := Suffix_Index + 1; |
d00681a7 | 4464 | Next_Elmt (AI_Tag_Elmt); |
17e14451 | 4465 | Next_Elmt (AI_Tag_Comp); |
4466 | end loop; | |
4467 | end if; | |
725a69d2 | 4468 | |
c6a30f24 | 4469 | -- Get the _tag entity and number of primitives of its dispatch table |
725a69d2 | 4470 | |
24971415 | 4471 | DT_Ptr := Node (First_Elmt (Access_Disp_Table (Typ))); |
4472 | Nb_Prim := UI_To_Int (DT_Entry_Count (First_Tag_Component (Typ))); | |
725a69d2 | 4473 | |
2ea346ac | 4474 | Set_Is_Statically_Allocated (DT, Is_Library_Level_Tagged_Type (Typ)); |
4475 | Set_Is_Statically_Allocated (SSD, Is_Library_Level_Tagged_Type (Typ)); | |
4476 | Set_Is_Statically_Allocated (TSD, Is_Library_Level_Tagged_Type (Typ)); | |
4477 | Set_Is_Statically_Allocated (Predef_Prims, | |
4478 | Is_Library_Level_Tagged_Type (Typ)); | |
725a69d2 | 4479 | |
4480 | -- In case of locally defined tagged type we declare the object | |
36b938a3 | 4481 | -- containing the dispatch table by means of a variable. Its |
725a69d2 | 4482 | -- initialization is done later by means of an assignment. This is |
4483 | -- required to generate its External_Tag. | |
4484 | ||
24971415 | 4485 | if not Building_Static_DT (Typ) then |
725a69d2 | 4486 | |
4487 | -- Generate: | |
4488 | -- DT : No_Dispatch_Table_Wrapper; | |
17e14451 | 4489 | -- for DT'Alignment use Address'Alignment; |
725a69d2 | 4490 | -- DT_Ptr : Tag := !Tag (DT.NDT_Prims_Ptr'Address); |
4491 | ||
24971415 | 4492 | if not Has_DT (Typ) then |
725a69d2 | 4493 | Append_To (Result, |
4494 | Make_Object_Declaration (Loc, | |
4495 | Defining_Identifier => DT, | |
4496 | Aliased_Present => True, | |
4497 | Constant_Present => False, | |
4498 | Object_Definition => | |
4499 | New_Reference_To | |
4500 | (RTE (RE_No_Dispatch_Table_Wrapper), Loc))); | |
4501 | ||
17e14451 | 4502 | Append_To (Result, |
4503 | Make_Attribute_Definition_Clause (Loc, | |
4504 | Name => New_Reference_To (DT, Loc), | |
4505 | Chars => Name_Alignment, | |
4506 | Expression => | |
4507 | Make_Attribute_Reference (Loc, | |
4508 | Prefix => | |
4509 | New_Reference_To (RTE (RE_Integer_Address), Loc), | |
4510 | Attribute_Name => Name_Alignment))); | |
4511 | ||
725a69d2 | 4512 | Append_To (Result, |
4513 | Make_Object_Declaration (Loc, | |
4514 | Defining_Identifier => DT_Ptr, | |
4515 | Object_Definition => New_Reference_To (RTE (RE_Tag), Loc), | |
4516 | Constant_Present => True, | |
4517 | Expression => | |
24971415 | 4518 | Unchecked_Convert_To (RTE (RE_Tag), |
725a69d2 | 4519 | Make_Attribute_Reference (Loc, |
4520 | Prefix => | |
4521 | Make_Selected_Component (Loc, | |
4522 | Prefix => New_Reference_To (DT, Loc), | |
4523 | Selector_Name => | |
4524 | New_Occurrence_Of | |
4525 | (RTE_Record_Component (RE_NDT_Prims_Ptr), Loc)), | |
4526 | Attribute_Name => Name_Address)))); | |
4527 | ||
ff6293ec | 4528 | Set_Is_Statically_Allocated (DT_Ptr, |
4529 | Is_Library_Level_Tagged_Type (Typ)); | |
4530 | ||
98045ff0 | 4531 | -- Generate the SCIL node for the previous object declaration |
4532 | -- because it has a tag initialization. | |
4533 | ||
3dbca0d5 | 4534 | if Generate_SCIL then |
d215f619 | 4535 | New_Node := |
4536 | Make_SCIL_Dispatch_Table_Tag_Init (Sloc (Last (Result))); | |
d215f619 | 4537 | Set_SCIL_Entity (New_Node, Typ); |
5a44b136 | 4538 | Set_SCIL_Node (Last (Result), New_Node); |
3dbca0d5 | 4539 | end if; |
4540 | ||
725a69d2 | 4541 | -- Generate: |
4542 | -- DT : Dispatch_Table_Wrapper (Nb_Prim); | |
4543 | -- for DT'Alignment use Address'Alignment; | |
4544 | -- DT_Ptr : Tag := !Tag (DT.Prims_Ptr'Address); | |
4545 | ||
4546 | else | |
4547 | -- If the tagged type has no primitives we add a dummy slot | |
4548 | -- whose address will be the tag of this type. | |
4549 | ||
4550 | if Nb_Prim = 0 then | |
4551 | DT_Constr_List := | |
4552 | New_List (Make_Integer_Literal (Loc, 1)); | |
4553 | else | |
4554 | DT_Constr_List := | |
4555 | New_List (Make_Integer_Literal (Loc, Nb_Prim)); | |
4556 | end if; | |
4557 | ||
4558 | Append_To (Result, | |
4559 | Make_Object_Declaration (Loc, | |
4560 | Defining_Identifier => DT, | |
4561 | Aliased_Present => True, | |
4562 | Constant_Present => False, | |
4563 | Object_Definition => | |
4564 | Make_Subtype_Indication (Loc, | |
4565 | Subtype_Mark => | |
4566 | New_Reference_To (RTE (RE_Dispatch_Table_Wrapper), Loc), | |
4567 | Constraint => Make_Index_Or_Discriminant_Constraint (Loc, | |
4568 | Constraints => DT_Constr_List)))); | |
4569 | ||
4570 | Append_To (Result, | |
4571 | Make_Attribute_Definition_Clause (Loc, | |
4572 | Name => New_Reference_To (DT, Loc), | |
4573 | Chars => Name_Alignment, | |
4574 | Expression => | |
4575 | Make_Attribute_Reference (Loc, | |
4576 | Prefix => | |
4577 | New_Reference_To (RTE (RE_Integer_Address), Loc), | |
4578 | Attribute_Name => Name_Alignment))); | |
4579 | ||
4580 | Append_To (Result, | |
4581 | Make_Object_Declaration (Loc, | |
4582 | Defining_Identifier => DT_Ptr, | |
4583 | Object_Definition => New_Reference_To (RTE (RE_Tag), Loc), | |
4584 | Constant_Present => True, | |
4585 | Expression => | |
24971415 | 4586 | Unchecked_Convert_To (RTE (RE_Tag), |
725a69d2 | 4587 | Make_Attribute_Reference (Loc, |
4588 | Prefix => | |
4589 | Make_Selected_Component (Loc, | |
4590 | Prefix => New_Reference_To (DT, Loc), | |
4591 | Selector_Name => | |
4592 | New_Occurrence_Of | |
4593 | (RTE_Record_Component (RE_Prims_Ptr), Loc)), | |
4594 | Attribute_Name => Name_Address)))); | |
acf97c11 | 4595 | |
ff6293ec | 4596 | Set_Is_Statically_Allocated (DT_Ptr, |
4597 | Is_Library_Level_Tagged_Type (Typ)); | |
4598 | ||
98045ff0 | 4599 | -- Generate the SCIL node for the previous object declaration |
4600 | -- because it has a tag initialization. | |
9af28f61 | 4601 | |
3dbca0d5 | 4602 | if Generate_SCIL then |
d215f619 | 4603 | New_Node := |
4604 | Make_SCIL_Dispatch_Table_Tag_Init (Sloc (Last (Result))); | |
d215f619 | 4605 | Set_SCIL_Entity (New_Node, Typ); |
5a44b136 | 4606 | Set_SCIL_Node (Last (Result), New_Node); |
3dbca0d5 | 4607 | end if; |
4608 | ||
acf97c11 | 4609 | Append_To (Result, |
4610 | Make_Object_Declaration (Loc, | |
4611 | Defining_Identifier => | |
4612 | Node (Next_Elmt (First_Elmt (Access_Disp_Table (Typ)))), | |
4613 | Constant_Present => True, | |
4614 | Object_Definition => New_Reference_To | |
4615 | (RTE (RE_Address), Loc), | |
4616 | Expression => | |
4617 | Make_Attribute_Reference (Loc, | |
4618 | Prefix => | |
4619 | Make_Selected_Component (Loc, | |
4620 | Prefix => New_Reference_To (DT, Loc), | |
4621 | Selector_Name => | |
4622 | New_Occurrence_Of | |
4623 | (RTE_Record_Component (RE_Predef_Prims), Loc)), | |
4624 | Attribute_Name => Name_Address))); | |
725a69d2 | 4625 | end if; |
4626 | end if; | |
4627 | ||
4628 | -- Generate: Exname : constant String := full_qualified_name (typ); | |
343d35dc | 4629 | -- The type itself may be an anonymous parent type, so use the first |
4630 | -- subtype to have a user-recognizable name. | |
d62940bf | 4631 | |
343d35dc | 4632 | Append_To (Result, |
4633 | Make_Object_Declaration (Loc, | |
4634 | Defining_Identifier => Exname, | |
4635 | Constant_Present => True, | |
4636 | Object_Definition => New_Reference_To (Standard_String, Loc), | |
4637 | Expression => | |
4638 | Make_String_Literal (Loc, | |
c6a30f24 | 4639 | Fully_Qualified_Name_String (First_Subtype (Typ))))); |
d62940bf | 4640 | |
24971415 | 4641 | Set_Is_Statically_Allocated (Exname); |
4642 | Set_Is_True_Constant (Exname); | |
4643 | ||
e7e688dd | 4644 | -- Declare the object used by Ada.Tags.Register_Tag |
4645 | ||
4646 | if RTE_Available (RE_Register_Tag) then | |
4647 | Append_To (Result, | |
4648 | Make_Object_Declaration (Loc, | |
4649 | Defining_Identifier => HT_Link, | |
4650 | Object_Definition => New_Reference_To (RTE (RE_Tag), Loc))); | |
4651 | end if; | |
4652 | ||
725a69d2 | 4653 | -- Generate code to create the storage for the type specific data object |
4654 | -- with enough space to store the tags of the ancestors plus the tags | |
4655 | -- of all the implemented interfaces (as described in a-tags.adb). | |
4656 | ||
4657 | -- TSD : Type_Specific_Data (I_Depth) := | |
4658 | -- (Idepth => I_Depth, | |
4659 | -- Access_Level => Type_Access_Level (Typ), | |
4660 | -- Expanded_Name => Cstring_Ptr!(Exname'Address)) | |
4661 | -- External_Tag => Cstring_Ptr!(Exname'Address)) | |
e7e688dd | 4662 | -- HT_Link => HT_Link'Address, |
725a69d2 | 4663 | -- Transportable => <<boolean-value>>, |
3568e554 | 4664 | -- Type_Is_Abstract => <<boolean-value>>, |
725a69d2 | 4665 | -- RC_Offset => <<integer-value>>, |
cc60bd16 | 4666 | -- [ Size_Func => Size_Prim'Access ] |
725a69d2 | 4667 | -- [ Interfaces_Table => <<access-value>> ] |
24971415 | 4668 | -- [ SSD => SSD_Table'Address ] |
725a69d2 | 4669 | -- Tags_Table => (0 => null, |
4670 | -- 1 => Parent'Tag | |
4671 | -- ...); | |
4672 | -- for TSD'Alignment use Address'Alignment | |
4673 | ||
4674 | TSD_Aggr_List := New_List; | |
4675 | ||
4676 | -- Idepth: Count ancestors to compute the inheritance depth. For private | |
4677 | -- extensions, always go to the full view in order to compute the real | |
4678 | -- inheritance depth. | |
4679 | ||
4680 | declare | |
4681 | Current_Typ : Entity_Id; | |
4682 | Parent_Typ : Entity_Id; | |
4683 | ||
4684 | begin | |
4685 | I_Depth := 0; | |
4686 | Current_Typ := Typ; | |
4687 | loop | |
4688 | Parent_Typ := Etype (Current_Typ); | |
4689 | ||
4690 | if Is_Private_Type (Parent_Typ) then | |
4691 | Parent_Typ := Full_View (Base_Type (Parent_Typ)); | |
4692 | end if; | |
4693 | ||
4694 | exit when Parent_Typ = Current_Typ; | |
4695 | ||
4696 | I_Depth := I_Depth + 1; | |
4697 | Current_Typ := Parent_Typ; | |
4698 | end loop; | |
4699 | end; | |
4700 | ||
4701 | Append_To (TSD_Aggr_List, | |
17e14451 | 4702 | Make_Integer_Literal (Loc, I_Depth)); |
725a69d2 | 4703 | |
4704 | -- Access_Level | |
4705 | ||
4706 | Append_To (TSD_Aggr_List, | |
17e14451 | 4707 | Make_Integer_Literal (Loc, Type_Access_Level (Typ))); |
725a69d2 | 4708 | |
4709 | -- Expanded_Name | |
4710 | ||
4711 | Append_To (TSD_Aggr_List, | |
17e14451 | 4712 | Unchecked_Convert_To (RTE (RE_Cstring_Ptr), |
4713 | Make_Attribute_Reference (Loc, | |
4714 | Prefix => New_Reference_To (Exname, Loc), | |
4715 | Attribute_Name => Name_Address))); | |
725a69d2 | 4716 | |
4717 | -- External_Tag of a local tagged type | |
4718 | ||
17e14451 | 4719 | -- <typ>A : constant String := |
725a69d2 | 4720 | -- "Internal tag at 16#tag-addr#: <full-name-of-typ>"; |
4721 | ||
4722 | -- The reason we generate this strange name is that we do not want to | |
4723 | -- enter local tagged types in the global hash table used to compute | |
4724 | -- the Internal_Tag attribute for two reasons: | |
4725 | ||
4726 | -- 1. It is hard to avoid a tasking race condition for entering the | |
4727 | -- entry into the hash table. | |
4728 | ||
4729 | -- 2. It would cause a storage leak, unless we rig up considerable | |
4730 | -- mechanism to remove the entry from the hash table on exit. | |
4731 | ||
4732 | -- So what we do is to generate the above external tag name, where the | |
4733 | -- hex address is the address of the local dispatch table (i.e. exactly | |
4734 | -- the value we want if Internal_Tag is computed from this string). | |
4735 | ||
4736 | -- Of course this value will only be valid if the tagged type is still | |
4737 | -- in scope, but it clearly must be erroneous to compute the internal | |
4738 | -- tag of a tagged type that is out of scope! | |
4739 | ||
17e14451 | 4740 | -- We don't do this processing if an explicit external tag has been |
4741 | -- specified. That's an odd case for which we have already issued a | |
4742 | -- warning, where we will not be able to compute the internal tag. | |
4743 | ||
4744 | if not Is_Library_Level_Entity (Typ) | |
4745 | and then not Has_External_Tag_Rep_Clause (Typ) | |
4746 | then | |
725a69d2 | 4747 | declare |
725a69d2 | 4748 | Exname : constant Entity_Id := |
17e14451 | 4749 | Make_Defining_Identifier (Loc, |
4750 | New_External_Name (Tname, 'A')); | |
4751 | ||
725a69d2 | 4752 | Full_Name : constant String_Id := |
c6a30f24 | 4753 | Fully_Qualified_Name_String (First_Subtype (Typ)); |
725a69d2 | 4754 | Str1_Id : String_Id; |
4755 | Str2_Id : String_Id; | |
725a69d2 | 4756 | |
4757 | begin | |
4758 | -- Generate: | |
17e14451 | 4759 | -- Str1 = "Internal tag at 16#"; |
725a69d2 | 4760 | |
4761 | Start_String; | |
4762 | Store_String_Chars ("Internal tag at 16#"); | |
4763 | Str1_Id := End_String; | |
4764 | ||
4765 | -- Generate: | |
17e14451 | 4766 | -- Str2 = "#: <type-full-name>"; |
725a69d2 | 4767 | |
4768 | Start_String; | |
4769 | Store_String_Chars ("#: "); | |
725a69d2 | 4770 | Store_String_Chars (Full_Name); |
17e14451 | 4771 | Str2_Id := End_String; |
725a69d2 | 4772 | |
4773 | -- Generate: | |
4774 | -- Exname : constant String := | |
17e14451 | 4775 | -- Str1 & Address_Image (Tag) & Str2; |
725a69d2 | 4776 | |
4777 | if RTE_Available (RE_Address_Image) then | |
4778 | Append_To (Result, | |
4779 | Make_Object_Declaration (Loc, | |
4780 | Defining_Identifier => Exname, | |
4781 | Constant_Present => True, | |
4782 | Object_Definition => New_Reference_To | |
4783 | (Standard_String, Loc), | |
4784 | Expression => | |
4785 | Make_Op_Concat (Loc, | |
4786 | Left_Opnd => | |
4787 | Make_String_Literal (Loc, Str1_Id), | |
4788 | Right_Opnd => | |
4789 | Make_Op_Concat (Loc, | |
4790 | Left_Opnd => | |
4791 | Make_Function_Call (Loc, | |
4792 | Name => | |
4793 | New_Reference_To | |
4794 | (RTE (RE_Address_Image), Loc), | |
4795 | Parameter_Associations => New_List ( | |
4796 | Unchecked_Convert_To (RTE (RE_Address), | |
4797 | New_Reference_To (DT_Ptr, Loc)))), | |
4798 | Right_Opnd => | |
17e14451 | 4799 | Make_String_Literal (Loc, Str2_Id))))); |
4800 | ||
725a69d2 | 4801 | else |
4802 | Append_To (Result, | |
4803 | Make_Object_Declaration (Loc, | |
4804 | Defining_Identifier => Exname, | |
4805 | Constant_Present => True, | |
4806 | Object_Definition => New_Reference_To | |
4807 | (Standard_String, Loc), | |
4808 | Expression => | |
4809 | Make_Op_Concat (Loc, | |
4810 | Left_Opnd => | |
4811 | Make_String_Literal (Loc, Str1_Id), | |
4812 | Right_Opnd => | |
17e14451 | 4813 | Make_String_Literal (Loc, Str2_Id)))); |
725a69d2 | 4814 | end if; |
4815 | ||
4816 | New_Node := | |
4817 | Unchecked_Convert_To (RTE (RE_Cstring_Ptr), | |
4818 | Make_Attribute_Reference (Loc, | |
4819 | Prefix => New_Reference_To (Exname, Loc), | |
4820 | Attribute_Name => Name_Address)); | |
4821 | end; | |
4822 | ||
4823 | -- External tag of a library-level tagged type: Check for a definition | |
4824 | -- of External_Tag. The clause is considered only if it applies to this | |
4825 | -- specific tagged type, as opposed to one of its ancestors. | |
cc60bd16 | 4826 | -- If the type is an unconstrained type extension, we are building the |
4827 | -- dispatch table of its anonymous base type, so the external tag, if | |
34fd8639 | 4828 | -- any was specified, must be retrieved from the first subtype. Go to |
4829 | -- the full view in case the clause is in the private part. | |
725a69d2 | 4830 | |
4831 | else | |
4832 | declare | |
cc60bd16 | 4833 | Def : constant Node_Id := Get_Attribute_Definition_Clause |
34fd8639 | 4834 | (Underlying_Type (First_Subtype (Typ)), |
cc60bd16 | 4835 | Attribute_External_Tag); |
4836 | ||
725a69d2 | 4837 | Old_Val : String_Id; |
4838 | New_Val : String_Id; | |
4839 | E : Entity_Id; | |
4840 | ||
4841 | begin | |
4842 | if not Present (Def) | |
cc60bd16 | 4843 | or else Entity (Name (Def)) /= First_Subtype (Typ) |
725a69d2 | 4844 | then |
4845 | New_Node := | |
4846 | Unchecked_Convert_To (RTE (RE_Cstring_Ptr), | |
4847 | Make_Attribute_Reference (Loc, | |
cc60bd16 | 4848 | Prefix => New_Reference_To (Exname, Loc), |
725a69d2 | 4849 | Attribute_Name => Name_Address)); |
4850 | else | |
4851 | Old_Val := Strval (Expr_Value_S (Expression (Def))); | |
4852 | ||
17e14451 | 4853 | -- For the rep clause "for <typ>'external_tag use y" generate: |
725a69d2 | 4854 | |
17e14451 | 4855 | -- <typ>A : constant string := y; |
4856 | -- | |
4857 | -- <typ>A'Address is used to set the External_Tag component | |
4858 | -- of the TSD | |
725a69d2 | 4859 | |
4860 | -- Create a new nul terminated string if it is not already | |
4861 | ||
4862 | if String_Length (Old_Val) > 0 | |
4863 | and then | |
4864 | Get_String_Char (Old_Val, String_Length (Old_Val)) = 0 | |
4865 | then | |
4866 | New_Val := Old_Val; | |
4867 | else | |
4868 | Start_String (Old_Val); | |
4869 | Store_String_Char (Get_Char_Code (ASCII.NUL)); | |
4870 | New_Val := End_String; | |
4871 | end if; | |
4872 | ||
4873 | E := Make_Defining_Identifier (Loc, | |
4874 | New_External_Name (Chars (Typ), 'A')); | |
4875 | ||
4876 | Append_To (Result, | |
4877 | Make_Object_Declaration (Loc, | |
4878 | Defining_Identifier => E, | |
4879 | Constant_Present => True, | |
4880 | Object_Definition => | |
4881 | New_Reference_To (Standard_String, Loc), | |
4882 | Expression => | |
4883 | Make_String_Literal (Loc, New_Val))); | |
4884 | ||
4885 | New_Node := | |
4886 | Unchecked_Convert_To (RTE (RE_Cstring_Ptr), | |
4887 | Make_Attribute_Reference (Loc, | |
4888 | Prefix => New_Reference_To (E, Loc), | |
4889 | Attribute_Name => Name_Address)); | |
4890 | end if; | |
4891 | end; | |
4892 | end if; | |
4893 | ||
17e14451 | 4894 | Append_To (TSD_Aggr_List, New_Node); |
725a69d2 | 4895 | |
4896 | -- HT_Link | |
4897 | ||
e7e688dd | 4898 | if RTE_Available (RE_Register_Tag) then |
4899 | Append_To (TSD_Aggr_List, | |
4900 | Unchecked_Convert_To (RTE (RE_Tag_Ptr), | |
4901 | Make_Attribute_Reference (Loc, | |
4902 | Prefix => New_Reference_To (HT_Link, Loc), | |
4903 | Attribute_Name => Name_Address))); | |
4904 | else | |
4905 | Append_To (TSD_Aggr_List, | |
4906 | Unchecked_Convert_To (RTE (RE_Tag_Ptr), | |
4907 | New_Reference_To (RTE (RE_Null_Address), Loc))); | |
4908 | end if; | |
725a69d2 | 4909 | |
4910 | -- Transportable: Set for types that can be used in remote calls | |
4911 | -- with respect to E.4(18) legality rules. | |
4912 | ||
17e14451 | 4913 | declare |
4914 | Transportable : Entity_Id; | |
725a69d2 | 4915 | |
17e14451 | 4916 | begin |
4917 | Transportable := | |
4918 | Boolean_Literals | |
4919 | (Is_Pure (Typ) | |
4920 | or else Is_Shared_Passive (Typ) | |
4921 | or else | |
4922 | ((Is_Remote_Types (Typ) | |
4923 | or else Is_Remote_Call_Interface (Typ)) | |
4924 | and then Original_View_In_Visible_Part (Typ)) | |
4925 | or else not Comes_From_Source (Typ)); | |
4926 | ||
4927 | Append_To (TSD_Aggr_List, | |
4928 | New_Occurrence_Of (Transportable, Loc)); | |
4929 | end; | |
725a69d2 | 4930 | |
3568e554 | 4931 | -- Type_Is_Abstract (Ada 2012: AI05-0173). This functionality is |
4932 | -- not available in the HIE runtime. | |
4933 | ||
4934 | if RTE_Record_Component_Available (RE_Type_Is_Abstract) then | |
4935 | declare | |
4936 | Type_Is_Abstract : Entity_Id; | |
4937 | ||
4938 | begin | |
4939 | Type_Is_Abstract := | |
4940 | Boolean_Literals (Is_Abstract_Type (Typ)); | |
4941 | ||
4942 | Append_To (TSD_Aggr_List, | |
4943 | New_Occurrence_Of (Type_Is_Abstract, Loc)); | |
4944 | end; | |
4945 | end if; | |
4946 | ||
725a69d2 | 4947 | -- RC_Offset: These are the valid values and their meaning: |
4948 | ||
343d35dc | 4949 | -- >0: For simple types with controlled components is |
4950 | -- type._record_controller'position | |
725a69d2 | 4951 | |
343d35dc | 4952 | -- 0: For types with no controlled components |
725a69d2 | 4953 | |
343d35dc | 4954 | -- -1: For complex types with controlled components where the position |
4955 | -- of the record controller is not statically computable but there | |
4956 | -- are controlled components at this level. The _Controller field | |
4957 | -- is available right after the _parent. | |
725a69d2 | 4958 | |
343d35dc | 4959 | -- -2: There are no controlled components at this level. We need to |
4960 | -- get the position from the parent. | |
952af0b9 | 4961 | |
17e14451 | 4962 | declare |
4963 | RC_Offset_Node : Node_Id; | |
343d35dc | 4964 | |
17e14451 | 4965 | begin |
4966 | if not Has_Controlled_Component (Typ) then | |
4967 | RC_Offset_Node := Make_Integer_Literal (Loc, 0); | |
4968 | ||
4969 | elsif Etype (Typ) /= Typ | |
cdb1c38f | 4970 | and then Has_Discriminants (Parent_Typ) |
17e14451 | 4971 | then |
4972 | if Has_New_Controlled_Component (Typ) then | |
4973 | RC_Offset_Node := Make_Integer_Literal (Loc, -1); | |
4974 | else | |
4975 | RC_Offset_Node := Make_Integer_Literal (Loc, -2); | |
4976 | end if; | |
343d35dc | 4977 | else |
17e14451 | 4978 | RC_Offset_Node := |
4979 | Make_Attribute_Reference (Loc, | |
4980 | Prefix => | |
4981 | Make_Selected_Component (Loc, | |
4982 | Prefix => New_Reference_To (Typ, Loc), | |
4983 | Selector_Name => | |
4984 | New_Reference_To (Controller_Component (Typ), Loc)), | |
4985 | Attribute_Name => Name_Position); | |
4986 | ||
4987 | -- This is not proper Ada code to use the attribute 'Position | |
4988 | -- on something else than an object but this is supported by | |
4989 | -- the back end (see comment on the Bit_Component attribute in | |
4990 | -- sem_attr). So we avoid semantic checking here. | |
4991 | ||
4992 | -- Is this documented in sinfo.ads??? it should be! | |
4993 | ||
4994 | Set_Analyzed (RC_Offset_Node); | |
4995 | Set_Etype (Prefix (RC_Offset_Node), RTE (RE_Record_Controller)); | |
4996 | Set_Etype (Prefix (Prefix (RC_Offset_Node)), Typ); | |
4997 | Set_Etype (Selector_Name (Prefix (RC_Offset_Node)), | |
4998 | RTE (RE_Record_Controller)); | |
4999 | Set_Etype (RC_Offset_Node, RTE (RE_Storage_Offset)); | |
68f95949 | 5000 | end if; |
952af0b9 | 5001 | |
17e14451 | 5002 | Append_To (TSD_Aggr_List, RC_Offset_Node); |
5003 | end; | |
725a69d2 | 5004 | |
cc60bd16 | 5005 | -- Size_Func |
5006 | ||
5007 | if RTE_Record_Component_Available (RE_Size_Func) then | |
925c2ba1 | 5008 | |
5009 | -- Initialize this field to Null_Address if we are not building | |
5010 | -- static dispatch tables static or if the size function is not | |
5011 | -- available. In the former case we cannot initialize this field | |
5012 | -- until the function is frozen and registered in the dispatch | |
5013 | -- table (see Register_Primitive). | |
5014 | ||
5015 | if not Building_Static_DT (Typ) or else not Has_DT (Typ) then | |
cc60bd16 | 5016 | Append_To (TSD_Aggr_List, |
5017 | Unchecked_Convert_To (RTE (RE_Size_Ptr), | |
5018 | New_Reference_To (RTE (RE_Null_Address), Loc))); | |
5019 | ||
5020 | else | |
5021 | declare | |
5022 | Prim_Elmt : Elmt_Id; | |
5023 | Prim : Entity_Id; | |
fa6a6949 | 5024 | Size_Comp : Node_Id; |
cc60bd16 | 5025 | |
5026 | begin | |
5027 | Prim_Elmt := First_Elmt (Primitive_Operations (Typ)); | |
5028 | while Present (Prim_Elmt) loop | |
5029 | Prim := Node (Prim_Elmt); | |
5030 | ||
5031 | if Chars (Prim) = Name_uSize then | |
fc2907f6 | 5032 | Prim := Ultimate_Alias (Prim); |
cc60bd16 | 5033 | |
5034 | if Is_Abstract_Subprogram (Prim) then | |
fa6a6949 | 5035 | Size_Comp := |
cc60bd16 | 5036 | Unchecked_Convert_To (RTE (RE_Size_Ptr), |
fa6a6949 | 5037 | New_Reference_To (RTE (RE_Null_Address), Loc)); |
cc60bd16 | 5038 | else |
fa6a6949 | 5039 | Size_Comp := |
cc60bd16 | 5040 | Unchecked_Convert_To (RTE (RE_Size_Ptr), |
5041 | Make_Attribute_Reference (Loc, | |
5042 | Prefix => New_Reference_To (Prim, Loc), | |
fa6a6949 | 5043 | Attribute_Name => Name_Unrestricted_Access)); |
cc60bd16 | 5044 | end if; |
5045 | ||
5046 | exit; | |
5047 | end if; | |
5048 | ||
5049 | Next_Elmt (Prim_Elmt); | |
5050 | end loop; | |
fa6a6949 | 5051 | |
5052 | pragma Assert (Present (Size_Comp)); | |
5053 | Append_To (TSD_Aggr_List, Size_Comp); | |
cc60bd16 | 5054 | end; |
5055 | end if; | |
5056 | end if; | |
5057 | ||
725a69d2 | 5058 | -- Interfaces_Table (required for AI-405) |
5059 | ||
5060 | if RTE_Record_Component_Available (RE_Interfaces_Table) then | |
5061 | ||
5062 | -- Count the number of interface types implemented by Typ | |
5063 | ||
a652dd51 | 5064 | Collect_Interfaces (Typ, Typ_Ifaces); |
725a69d2 | 5065 | |
5066 | AI := First_Elmt (Typ_Ifaces); | |
5067 | while Present (AI) loop | |
5068 | Num_Ifaces := Num_Ifaces + 1; | |
5069 | Next_Elmt (AI); | |
5070 | end loop; | |
952af0b9 | 5071 | |
343d35dc | 5072 | if Num_Ifaces = 0 then |
725a69d2 | 5073 | Iface_Table_Node := Make_Null (Loc); |
952af0b9 | 5074 | |
725a69d2 | 5075 | -- Generate the Interface_Table object |
343d35dc | 5076 | |
5077 | else | |
725a69d2 | 5078 | declare |
17e14451 | 5079 | TSD_Ifaces_List : constant List_Id := New_List; |
cdb1c38f | 5080 | Elmt : Elmt_Id; |
5081 | Sec_DT_Tag : Node_Id; | |
725a69d2 | 5082 | |
5083 | begin | |
5084 | AI := First_Elmt (Typ_Ifaces); | |
5085 | while Present (AI) loop | |
a652dd51 | 5086 | if Is_Ancestor (Node (AI), Typ) then |
cdb1c38f | 5087 | Sec_DT_Tag := |
5088 | New_Reference_To (DT_Ptr, Loc); | |
5089 | else | |
acf97c11 | 5090 | Elmt := |
5091 | Next_Elmt | |
5092 | (Next_Elmt (First_Elmt (Access_Disp_Table (Typ)))); | |
cdb1c38f | 5093 | pragma Assert (Has_Thunks (Node (Elmt))); |
5094 | ||
d00681a7 | 5095 | while Is_Tag (Node (Elmt)) |
cdb1c38f | 5096 | and then not |
a652dd51 | 5097 | Is_Ancestor (Node (AI), Related_Type (Node (Elmt))) |
cdb1c38f | 5098 | loop |
5099 | pragma Assert (Has_Thunks (Node (Elmt))); | |
5100 | Next_Elmt (Elmt); | |
acf97c11 | 5101 | pragma Assert (Has_Thunks (Node (Elmt))); |
5102 | Next_Elmt (Elmt); | |
5103 | pragma Assert (not Has_Thunks (Node (Elmt))); | |
5104 | Next_Elmt (Elmt); | |
cdb1c38f | 5105 | pragma Assert (not Has_Thunks (Node (Elmt))); |
5106 | Next_Elmt (Elmt); | |
5107 | end loop; | |
5108 | ||
5109 | pragma Assert (Ekind (Node (Elmt)) = E_Constant | |
acf97c11 | 5110 | and then not |
5111 | Has_Thunks (Node (Next_Elmt (Next_Elmt (Elmt))))); | |
cdb1c38f | 5112 | Sec_DT_Tag := |
acf97c11 | 5113 | New_Reference_To (Node (Next_Elmt (Next_Elmt (Elmt))), |
5114 | Loc); | |
cdb1c38f | 5115 | end if; |
5116 | ||
17e14451 | 5117 | Append_To (TSD_Ifaces_List, |
5118 | Make_Aggregate (Loc, | |
5119 | Expressions => New_List ( | |
5120 | ||
5121 | -- Iface_Tag | |
5122 | ||
24971415 | 5123 | Unchecked_Convert_To (RTE (RE_Tag), |
725a69d2 | 5124 | New_Reference_To |
5125 | (Node (First_Elmt (Access_Disp_Table (Node (AI)))), | |
17e14451 | 5126 | Loc)), |
725a69d2 | 5127 | |
17e14451 | 5128 | -- Static_Offset_To_Top |
725a69d2 | 5129 | |
17e14451 | 5130 | New_Reference_To (Standard_True, Loc), |
725a69d2 | 5131 | |
17e14451 | 5132 | -- Offset_To_Top_Value |
5133 | ||
5134 | Make_Integer_Literal (Loc, 0), | |
5135 | ||
5136 | -- Offset_To_Top_Func | |
5137 | ||
cdb1c38f | 5138 | Make_Null (Loc), |
5139 | ||
5140 | -- Secondary_DT | |
5141 | ||
5142 | Unchecked_Convert_To (RTE (RE_Tag), Sec_DT_Tag) | |
5143 | ||
5144 | ))); | |
725a69d2 | 5145 | |
725a69d2 | 5146 | Next_Elmt (AI); |
5147 | end loop; | |
725a69d2 | 5148 | |
17e14451 | 5149 | Name_ITable := New_External_Name (Tname, 'I'); |
5150 | ITable := Make_Defining_Identifier (Loc, Name_ITable); | |
2ea346ac | 5151 | Set_Is_Statically_Allocated (ITable, |
5152 | Is_Library_Level_Tagged_Type (Typ)); | |
725a69d2 | 5153 | |
17e14451 | 5154 | -- The table of interfaces is not constant; its slots are |
0c826ed4 | 5155 | -- filled at run time by the IP routine using attribute |
17e14451 | 5156 | -- 'Position to know the location of the tag components |
5157 | -- (and this attribute cannot be safely used before the | |
5158 | -- object is initialized). | |
725a69d2 | 5159 | |
17e14451 | 5160 | Append_To (Result, |
5161 | Make_Object_Declaration (Loc, | |
5162 | Defining_Identifier => ITable, | |
5163 | Aliased_Present => True, | |
5164 | Constant_Present => False, | |
5165 | Object_Definition => | |
5166 | Make_Subtype_Indication (Loc, | |
5167 | Subtype_Mark => | |
5168 | New_Reference_To (RTE (RE_Interface_Data), Loc), | |
5169 | Constraint => Make_Index_Or_Discriminant_Constraint | |
5170 | (Loc, | |
5171 | Constraints => New_List ( | |
5172 | Make_Integer_Literal (Loc, Num_Ifaces)))), | |
725a69d2 | 5173 | |
17e14451 | 5174 | Expression => Make_Aggregate (Loc, |
5175 | Expressions => New_List ( | |
5176 | Make_Integer_Literal (Loc, Num_Ifaces), | |
5177 | Make_Aggregate (Loc, | |
5178 | Expressions => TSD_Ifaces_List))))); | |
725a69d2 | 5179 | |
17e14451 | 5180 | Append_To (Result, |
5181 | Make_Attribute_Definition_Clause (Loc, | |
5182 | Name => New_Reference_To (ITable, Loc), | |
5183 | Chars => Name_Alignment, | |
5184 | Expression => | |
5185 | Make_Attribute_Reference (Loc, | |
5186 | Prefix => | |
5187 | New_Reference_To (RTE (RE_Integer_Address), Loc), | |
5188 | Attribute_Name => Name_Alignment))); | |
725a69d2 | 5189 | |
17e14451 | 5190 | Iface_Table_Node := |
5191 | Make_Attribute_Reference (Loc, | |
5192 | Prefix => New_Reference_To (ITable, Loc), | |
5193 | Attribute_Name => Name_Unchecked_Access); | |
5194 | end; | |
725a69d2 | 5195 | end if; |
5196 | ||
17e14451 | 5197 | Append_To (TSD_Aggr_List, Iface_Table_Node); |
725a69d2 | 5198 | end if; |
5199 | ||
5200 | -- Generate the Select Specific Data table for synchronized types that | |
5201 | -- implement synchronized interfaces. The size of the table is | |
5202 | -- constrained by the number of non-predefined primitive operations. | |
5203 | ||
5204 | if RTE_Record_Component_Available (RE_SSD) then | |
de54c5ab | 5205 | if Ada_Version >= Ada_2005 |
24971415 | 5206 | and then Has_DT (Typ) |
725a69d2 | 5207 | and then Is_Concurrent_Record_Type (Typ) |
a652dd51 | 5208 | and then Has_Interfaces (Typ) |
725a69d2 | 5209 | and then Nb_Prim > 0 |
5210 | and then not Is_Abstract_Type (Typ) | |
5211 | and then not Is_Controlled (Typ) | |
5212 | and then not Restriction_Active (No_Dispatching_Calls) | |
f38c8084 | 5213 | and then not Restriction_Active (No_Select_Statements) |
725a69d2 | 5214 | then |
343d35dc | 5215 | Append_To (Result, |
5216 | Make_Object_Declaration (Loc, | |
725a69d2 | 5217 | Defining_Identifier => SSD, |
343d35dc | 5218 | Aliased_Present => True, |
5219 | Object_Definition => | |
5220 | Make_Subtype_Indication (Loc, | |
725a69d2 | 5221 | Subtype_Mark => New_Reference_To ( |
5222 | RTE (RE_Select_Specific_Data), Loc), | |
5223 | Constraint => | |
5224 | Make_Index_Or_Discriminant_Constraint (Loc, | |
5225 | Constraints => New_List ( | |
5226 | Make_Integer_Literal (Loc, Nb_Prim)))))); | |
5227 | ||
17e14451 | 5228 | Append_To (Result, |
5229 | Make_Attribute_Definition_Clause (Loc, | |
5230 | Name => New_Reference_To (SSD, Loc), | |
5231 | Chars => Name_Alignment, | |
5232 | Expression => | |
5233 | Make_Attribute_Reference (Loc, | |
5234 | Prefix => | |
5235 | New_Reference_To (RTE (RE_Integer_Address), Loc), | |
5236 | Attribute_Name => Name_Alignment))); | |
5237 | ||
725a69d2 | 5238 | -- This table is initialized by Make_Select_Specific_Data_Table, |
5239 | -- which calls Set_Entry_Index and Set_Prim_Op_Kind. | |
5240 | ||
5241 | Append_To (TSD_Aggr_List, | |
17e14451 | 5242 | Make_Attribute_Reference (Loc, |
5243 | Prefix => New_Reference_To (SSD, Loc), | |
5244 | Attribute_Name => Name_Unchecked_Access)); | |
725a69d2 | 5245 | else |
17e14451 | 5246 | Append_To (TSD_Aggr_List, Make_Null (Loc)); |
343d35dc | 5247 | end if; |
952af0b9 | 5248 | end if; |
5249 | ||
725a69d2 | 5250 | -- Initialize the table of ancestor tags. In case of interface types |
5251 | -- this table is not needed. | |
d62940bf | 5252 | |
cc60bd16 | 5253 | TSD_Tags_List := New_List; |
952af0b9 | 5254 | |
cc60bd16 | 5255 | -- If we are not statically allocating the dispatch table then we must |
5256 | -- fill position 0 with null because we still have not generated the | |
5257 | -- tag of Typ. | |
343d35dc | 5258 | |
cc60bd16 | 5259 | if not Building_Static_DT (Typ) |
5260 | or else Is_Interface (Typ) | |
5261 | then | |
5262 | Append_To (TSD_Tags_List, | |
5263 | Unchecked_Convert_To (RTE (RE_Tag), | |
5264 | New_Reference_To (RTE (RE_Null_Address), Loc))); | |
343d35dc | 5265 | |
cc60bd16 | 5266 | -- Otherwise we can safely reference the tag |
343d35dc | 5267 | |
cc60bd16 | 5268 | else |
5269 | Append_To (TSD_Tags_List, | |
5270 | New_Reference_To (DT_Ptr, Loc)); | |
5271 | end if; | |
343d35dc | 5272 | |
cc60bd16 | 5273 | -- Fill the rest of the table with the tags of the ancestors |
343d35dc | 5274 | |
cc60bd16 | 5275 | declare |
5276 | Current_Typ : Entity_Id; | |
5277 | Parent_Typ : Entity_Id; | |
5278 | Pos : Nat; | |
725a69d2 | 5279 | |
cc60bd16 | 5280 | begin |
17e14451 | 5281 | Pos := 1; |
5282 | Current_Typ := Typ; | |
725a69d2 | 5283 | |
17e14451 | 5284 | loop |
5285 | Parent_Typ := Etype (Current_Typ); | |
343d35dc | 5286 | |
17e14451 | 5287 | if Is_Private_Type (Parent_Typ) then |
5288 | Parent_Typ := Full_View (Base_Type (Parent_Typ)); | |
5289 | end if; | |
5290 | ||
5291 | exit when Parent_Typ = Current_Typ; | |
5292 | ||
7ac0f4a5 | 5293 | if Is_CPP_Class (Parent_Typ) then |
5294 | ||
17e14451 | 5295 | -- The tags defined in the C++ side will be inherited when |
5296 | -- the object is constructed (Exp_Ch3.Build_Init_Procedure) | |
5297 | ||
5298 | Append_To (TSD_Tags_List, | |
5299 | Unchecked_Convert_To (RTE (RE_Tag), | |
5300 | New_Reference_To (RTE (RE_Null_Address), Loc))); | |
5301 | else | |
5302 | Append_To (TSD_Tags_List, | |
5303 | New_Reference_To | |
5304 | (Node (First_Elmt (Access_Disp_Table (Parent_Typ))), | |
5305 | Loc)); | |
5306 | end if; | |
5307 | ||
5308 | Pos := Pos + 1; | |
5309 | Current_Typ := Parent_Typ; | |
5310 | end loop; | |
5311 | ||
5312 | pragma Assert (Pos = I_Depth + 1); | |
5313 | end; | |
5314 | ||
5315 | Append_To (TSD_Aggr_List, | |
5316 | Make_Aggregate (Loc, | |
5317 | Expressions => TSD_Tags_List)); | |
343d35dc | 5318 | |
725a69d2 | 5319 | -- Build the TSD object |
343d35dc | 5320 | |
5321 | Append_To (Result, | |
5322 | Make_Object_Declaration (Loc, | |
5323 | Defining_Identifier => TSD, | |
5324 | Aliased_Present => True, | |
24971415 | 5325 | Constant_Present => Building_Static_DT (Typ), |
343d35dc | 5326 | Object_Definition => |
5327 | Make_Subtype_Indication (Loc, | |
5328 | Subtype_Mark => New_Reference_To ( | |
5329 | RTE (RE_Type_Specific_Data), Loc), | |
5330 | Constraint => | |
5331 | Make_Index_Or_Discriminant_Constraint (Loc, | |
5332 | Constraints => New_List ( | |
5333 | Make_Integer_Literal (Loc, I_Depth)))), | |
725a69d2 | 5334 | |
343d35dc | 5335 | Expression => Make_Aggregate (Loc, |
17e14451 | 5336 | Expressions => TSD_Aggr_List))); |
343d35dc | 5337 | |
24971415 | 5338 | Set_Is_True_Constant (TSD, Building_Static_DT (Typ)); |
5339 | ||
343d35dc | 5340 | Append_To (Result, |
5341 | Make_Attribute_Definition_Clause (Loc, | |
5342 | Name => New_Reference_To (TSD, Loc), | |
5343 | Chars => Name_Alignment, | |
5344 | Expression => | |
5345 | Make_Attribute_Reference (Loc, | |
5346 | Prefix => New_Reference_To (RTE (RE_Integer_Address), Loc), | |
5347 | Attribute_Name => Name_Alignment))); | |
5348 | ||
24971415 | 5349 | -- Initialize or declare the dispatch table object |
343d35dc | 5350 | |
24971415 | 5351 | if not Has_DT (Typ) then |
725a69d2 | 5352 | DT_Constr_List := New_List; |
5353 | DT_Aggr_List := New_List; | |
343d35dc | 5354 | |
725a69d2 | 5355 | -- Typeinfo |
952af0b9 | 5356 | |
725a69d2 | 5357 | New_Node := |
5358 | Make_Attribute_Reference (Loc, | |
5359 | Prefix => New_Reference_To (TSD, Loc), | |
5360 | Attribute_Name => Name_Address); | |
5361 | ||
5362 | Append_To (DT_Constr_List, New_Node); | |
5363 | Append_To (DT_Aggr_List, New_Copy (New_Node)); | |
5364 | Append_To (DT_Aggr_List, Make_Integer_Literal (Loc, 0)); | |
5365 | ||
5366 | -- In case of locally defined tagged types we have already declared | |
5367 | -- and uninitialized object for the dispatch table, which is now | |
24971415 | 5368 | -- initialized by means of the following assignment: |
5369 | ||
5370 | -- DT := (TSD'Address, 0); | |
725a69d2 | 5371 | |
24971415 | 5372 | if not Building_Static_DT (Typ) then |
725a69d2 | 5373 | Append_To (Result, |
5374 | Make_Assignment_Statement (Loc, | |
5375 | Name => New_Reference_To (DT, Loc), | |
5376 | Expression => Make_Aggregate (Loc, | |
5377 | Expressions => DT_Aggr_List))); | |
5378 | ||
24971415 | 5379 | -- In case of library level tagged types we declare and export now |
5380 | -- the constant object containing the dummy dispatch table. There | |
5381 | -- is no need to declare the tag here because it has been previously | |
5382 | -- declared by Make_Tags | |
5383 | ||
5384 | -- DT : aliased constant No_Dispatch_Table := | |
5385 | -- (NDT_TSD => TSD'Address; | |
5386 | -- NDT_Prims_Ptr => 0); | |
5387 | -- for DT'Alignment use Address'Alignment; | |
725a69d2 | 5388 | |
5389 | else | |
5390 | Append_To (Result, | |
5391 | Make_Object_Declaration (Loc, | |
5392 | Defining_Identifier => DT, | |
5393 | Aliased_Present => True, | |
17e14451 | 5394 | Constant_Present => True, |
725a69d2 | 5395 | Object_Definition => |
5396 | New_Reference_To (RTE (RE_No_Dispatch_Table_Wrapper), Loc), | |
5397 | Expression => Make_Aggregate (Loc, | |
5398 | Expressions => DT_Aggr_List))); | |
5399 | ||
17e14451 | 5400 | Append_To (Result, |
5401 | Make_Attribute_Definition_Clause (Loc, | |
5402 | Name => New_Reference_To (DT, Loc), | |
5403 | Chars => Name_Alignment, | |
5404 | Expression => | |
5405 | Make_Attribute_Reference (Loc, | |
5406 | Prefix => | |
5407 | New_Reference_To (RTE (RE_Integer_Address), Loc), | |
5408 | Attribute_Name => Name_Alignment))); | |
5409 | ||
24971415 | 5410 | Export_DT (Typ, DT); |
725a69d2 | 5411 | end if; |
5412 | ||
5413 | -- Common case: Typ has a dispatch table | |
5414 | ||
5415 | -- Generate: | |
5416 | ||
5417 | -- Predef_Prims : Address_Array (1 .. Default_Prim_Ops_Count) := | |
5418 | -- (predef-prim-op-1'address, | |
5419 | -- predef-prim-op-2'address, | |
5420 | -- ... | |
5421 | -- predef-prim-op-n'address); | |
5422 | -- for Predef_Prims'Alignment use Address'Alignment | |
5423 | ||
5424 | -- DT : Dispatch_Table (Nb_Prims) := | |
5425 | -- (Signature => <sig-value>, | |
5426 | -- Tag_Kind => <tag_kind-value>, | |
5427 | -- Predef_Prims => Predef_Prims'First'Address, | |
5428 | -- Offset_To_Top => 0, | |
5429 | -- TSD => TSD'Address; | |
5430 | -- Prims_Ptr => (prim-op-1'address, | |
5431 | -- prim-op-2'address, | |
5432 | -- ... | |
5433 | -- prim-op-n'address)); | |
17e14451 | 5434 | -- for DT'Alignment use Address'Alignment |
725a69d2 | 5435 | |
5436 | else | |
5437 | declare | |
5438 | Pos : Nat; | |
5439 | ||
5440 | begin | |
24971415 | 5441 | if not Building_Static_DT (Typ) then |
725a69d2 | 5442 | Nb_Predef_Prims := Max_Predef_Prims; |
5443 | ||
5444 | else | |
5445 | Prim_Elmt := First_Elmt (Primitive_Operations (Typ)); | |
5446 | while Present (Prim_Elmt) loop | |
5447 | Prim := Node (Prim_Elmt); | |
5448 | ||
5449 | if Is_Predefined_Dispatching_Operation (Prim) | |
5450 | and then not Is_Abstract_Subprogram (Prim) | |
5451 | then | |
5452 | Pos := UI_To_Int (DT_Position (Prim)); | |
5453 | ||
5454 | if Pos > Nb_Predef_Prims then | |
5455 | Nb_Predef_Prims := Pos; | |
5456 | end if; | |
5457 | end if; | |
5458 | ||
5459 | Next_Elmt (Prim_Elmt); | |
5460 | end loop; | |
5461 | end if; | |
5462 | ||
5463 | declare | |
5464 | Prim_Table : array | |
5465 | (Nat range 1 .. Nb_Predef_Prims) of Entity_Id; | |
cc60bd16 | 5466 | Decl : Node_Id; |
725a69d2 | 5467 | E : Entity_Id; |
5468 | ||
5469 | begin | |
5470 | Prim_Ops_Aggr_List := New_List; | |
5471 | ||
5472 | Prim_Table := (others => Empty); | |
17e14451 | 5473 | |
cdb1c38f | 5474 | if Building_Static_DT (Typ) then |
5475 | Prim_Elmt := First_Elmt (Primitive_Operations (Typ)); | |
5476 | while Present (Prim_Elmt) loop | |
5477 | Prim := Node (Prim_Elmt); | |
725a69d2 | 5478 | |
cdb1c38f | 5479 | if Is_Predefined_Dispatching_Operation (Prim) |
5480 | and then not Is_Abstract_Subprogram (Prim) | |
3f8cf2d2 | 5481 | and then not Is_Eliminated (Prim) |
cdb1c38f | 5482 | and then not Present (Prim_Table |
5483 | (UI_To_Int (DT_Position (Prim)))) | |
5484 | then | |
fc2907f6 | 5485 | E := Ultimate_Alias (Prim); |
cdb1c38f | 5486 | pragma Assert (not Is_Abstract_Subprogram (E)); |
5487 | Prim_Table (UI_To_Int (DT_Position (Prim))) := E; | |
5488 | end if; | |
725a69d2 | 5489 | |
cdb1c38f | 5490 | Next_Elmt (Prim_Elmt); |
5491 | end loop; | |
5492 | end if; | |
725a69d2 | 5493 | |
5494 | for J in Prim_Table'Range loop | |
5495 | if Present (Prim_Table (J)) then | |
5496 | New_Node := | |
cc60bd16 | 5497 | Unchecked_Convert_To (RTE (RE_Prim_Ptr), |
acf97c11 | 5498 | Make_Attribute_Reference (Loc, |
5499 | Prefix => New_Reference_To (Prim_Table (J), Loc), | |
5500 | Attribute_Name => Name_Unrestricted_Access)); | |
725a69d2 | 5501 | else |
cc60bd16 | 5502 | New_Node := Make_Null (Loc); |
725a69d2 | 5503 | end if; |
5504 | ||
5505 | Append_To (Prim_Ops_Aggr_List, New_Node); | |
5506 | end loop; | |
343d35dc | 5507 | |
cc60bd16 | 5508 | New_Node := |
5509 | Make_Aggregate (Loc, | |
5510 | Expressions => Prim_Ops_Aggr_List); | |
5511 | ||
5512 | Decl := | |
5513 | Make_Subtype_Declaration (Loc, | |
ec97ce79 | 5514 | Defining_Identifier => Make_Temporary (Loc, 'S'), |
5515 | Subtype_Indication => | |
cc60bd16 | 5516 | New_Reference_To (RTE (RE_Address_Array), Loc)); |
5517 | ||
5518 | Append_To (Result, Decl); | |
5519 | ||
68f95949 | 5520 | Append_To (Result, |
5521 | Make_Object_Declaration (Loc, | |
725a69d2 | 5522 | Defining_Identifier => Predef_Prims, |
68f95949 | 5523 | Aliased_Present => True, |
24971415 | 5524 | Constant_Present => Building_Static_DT (Typ), |
cc60bd16 | 5525 | Object_Definition => New_Reference_To |
5526 | (Defining_Identifier (Decl), Loc), | |
5527 | Expression => New_Node)); | |
5528 | ||
5529 | -- Remember aggregates initializing dispatch tables | |
5530 | ||
5531 | Append_Elmt (New_Node, DT_Aggr); | |
725a69d2 | 5532 | |
5533 | Append_To (Result, | |
5534 | Make_Attribute_Definition_Clause (Loc, | |
5535 | Name => New_Reference_To (Predef_Prims, Loc), | |
5536 | Chars => Name_Alignment, | |
5537 | Expression => | |
5538 | Make_Attribute_Reference (Loc, | |
5539 | Prefix => | |
5540 | New_Reference_To (RTE (RE_Integer_Address), Loc), | |
5541 | Attribute_Name => Name_Alignment))); | |
5542 | end; | |
5543 | end; | |
5544 | ||
5545 | -- Stage 1: Initialize the discriminant and the record components | |
5546 | ||
5547 | DT_Constr_List := New_List; | |
5548 | DT_Aggr_List := New_List; | |
5549 | ||
5550 | -- Num_Prims. If the tagged type has no primitives we add a dummy | |
5551 | -- slot whose address will be the tag of this type. | |
5552 | ||
5553 | if Nb_Prim = 0 then | |
5554 | New_Node := Make_Integer_Literal (Loc, 1); | |
5555 | else | |
5556 | New_Node := Make_Integer_Literal (Loc, Nb_Prim); | |
5557 | end if; | |
5558 | ||
5559 | Append_To (DT_Constr_List, New_Node); | |
5560 | Append_To (DT_Aggr_List, New_Copy (New_Node)); | |
5561 | ||
5562 | -- Signature | |
5563 | ||
5564 | if RTE_Record_Component_Available (RE_Signature) then | |
5565 | Append_To (DT_Aggr_List, | |
5566 | New_Reference_To (RTE (RE_Primary_DT), Loc)); | |
5567 | end if; | |
5568 | ||
5569 | -- Tag_Kind | |
5570 | ||
5571 | if RTE_Record_Component_Available (RE_Tag_Kind) then | |
5572 | Append_To (DT_Aggr_List, Tagged_Kind (Typ)); | |
5573 | end if; | |
5574 | ||
5575 | -- Predef_Prims | |
5576 | ||
5577 | Append_To (DT_Aggr_List, | |
5578 | Make_Attribute_Reference (Loc, | |
5579 | Prefix => New_Reference_To (Predef_Prims, Loc), | |
5580 | Attribute_Name => Name_Address)); | |
5581 | ||
5582 | -- Offset_To_Top | |
5583 | ||
cc60bd16 | 5584 | Append_To (DT_Aggr_List, Make_Integer_Literal (Loc, 0)); |
725a69d2 | 5585 | |
5586 | -- Typeinfo | |
5587 | ||
5588 | Append_To (DT_Aggr_List, | |
5589 | Make_Attribute_Reference (Loc, | |
5590 | Prefix => New_Reference_To (TSD, Loc), | |
5591 | Attribute_Name => Name_Address)); | |
5592 | ||
5593 | -- Stage 2: Initialize the table of primitive operations | |
5594 | ||
5595 | Prim_Ops_Aggr_List := New_List; | |
5596 | ||
5597 | if Nb_Prim = 0 then | |
cc60bd16 | 5598 | Append_To (Prim_Ops_Aggr_List, Make_Null (Loc)); |
725a69d2 | 5599 | |
9a479e51 | 5600 | elsif not Building_Static_DT (Typ) then |
725a69d2 | 5601 | for J in 1 .. Nb_Prim loop |
cc60bd16 | 5602 | Append_To (Prim_Ops_Aggr_List, Make_Null (Loc)); |
725a69d2 | 5603 | end loop; |
5604 | ||
5605 | else | |
5606 | declare | |
d00681a7 | 5607 | CPP_Nb_Prims : constant Nat := CPP_Num_Prims (Typ); |
5608 | E : Entity_Id; | |
5609 | Prim : Entity_Id; | |
5610 | Prim_Elmt : Elmt_Id; | |
5611 | Prim_Pos : Nat; | |
5612 | Prim_Table : array (Nat range 1 .. Nb_Prim) of Entity_Id; | |
725a69d2 | 5613 | |
5614 | begin | |
5615 | Prim_Table := (others => Empty); | |
cdb1c38f | 5616 | |
5617 | Prim_Elmt := First_Elmt (Primitive_Operations (Typ)); | |
725a69d2 | 5618 | while Present (Prim_Elmt) loop |
5619 | Prim := Node (Prim_Elmt); | |
5620 | ||
9429b6e9 | 5621 | -- Retrieve the ultimate alias of the primitive for proper |
5622 | -- handling of renamings and eliminated primitives. | |
5623 | ||
d00681a7 | 5624 | E := Ultimate_Alias (Prim); |
5625 | Prim_Pos := UI_To_Int (DT_Position (E)); | |
9429b6e9 | 5626 | |
3f8cf2d2 | 5627 | -- Do not reference predefined primitives because they are |
5628 | -- located in a separate dispatch table; skip entities with | |
5629 | -- attribute Interface_Alias because they are only required | |
d00681a7 | 5630 | -- to build secondary dispatch tables; skip abstract and |
5631 | -- eliminated primitives; for derivations of CPP types skip | |
5632 | -- primitives located in the C++ part of the dispatch table | |
5633 | -- because their slot is initialized by the IC routine. | |
725a69d2 | 5634 | |
3f8cf2d2 | 5635 | if not Is_Predefined_Dispatching_Operation (Prim) |
5636 | and then not Is_Predefined_Dispatching_Operation (E) | |
5637 | and then not Present (Interface_Alias (Prim)) | |
5638 | and then not Is_Abstract_Subprogram (E) | |
3f8cf2d2 | 5639 | and then not Is_Eliminated (E) |
d00681a7 | 5640 | and then (not Is_CPP_Class (Root_Type (Typ)) |
5641 | or else Prim_Pos > CPP_Nb_Prims) | |
3f8cf2d2 | 5642 | then |
5643 | pragma Assert | |
5644 | (UI_To_Int (DT_Position (Prim)) <= Nb_Prim); | |
5645 | ||
5646 | Prim_Table (UI_To_Int (DT_Position (Prim))) := E; | |
725a69d2 | 5647 | end if; |
5648 | ||
5649 | Next_Elmt (Prim_Elmt); | |
5650 | end loop; | |
5651 | ||
5652 | for J in Prim_Table'Range loop | |
5653 | if Present (Prim_Table (J)) then | |
5654 | New_Node := | |
cc60bd16 | 5655 | Unchecked_Convert_To (RTE (RE_Prim_Ptr), |
acf97c11 | 5656 | Make_Attribute_Reference (Loc, |
5657 | Prefix => New_Reference_To (Prim_Table (J), Loc), | |
5658 | Attribute_Name => Name_Unrestricted_Access)); | |
725a69d2 | 5659 | else |
cc60bd16 | 5660 | New_Node := Make_Null (Loc); |
725a69d2 | 5661 | end if; |
5662 | ||
5663 | Append_To (Prim_Ops_Aggr_List, New_Node); | |
5664 | end loop; | |
5665 | end; | |
5666 | end if; | |
5667 | ||
cc60bd16 | 5668 | New_Node := |
725a69d2 | 5669 | Make_Aggregate (Loc, |
cc60bd16 | 5670 | Expressions => Prim_Ops_Aggr_List); |
5671 | ||
5672 | Append_To (DT_Aggr_List, New_Node); | |
5673 | ||
5674 | -- Remember aggregates initializing dispatch tables | |
5675 | ||
5676 | Append_Elmt (New_Node, DT_Aggr); | |
725a69d2 | 5677 | |
5678 | -- In case of locally defined tagged types we have already declared | |
5679 | -- and uninitialized object for the dispatch table, which is now | |
5680 | -- initialized by means of an assignment. | |
5681 | ||
24971415 | 5682 | if not Building_Static_DT (Typ) then |
725a69d2 | 5683 | Append_To (Result, |
5684 | Make_Assignment_Statement (Loc, | |
5685 | Name => New_Reference_To (DT, Loc), | |
5686 | Expression => Make_Aggregate (Loc, | |
5687 | Expressions => DT_Aggr_List))); | |
5688 | ||
24971415 | 5689 | -- In case of library level tagged types we declare now and export |
5690 | -- the constant object containing the dispatch table. | |
725a69d2 | 5691 | |
5692 | else | |
5693 | Append_To (Result, | |
5694 | Make_Object_Declaration (Loc, | |
5695 | Defining_Identifier => DT, | |
5696 | Aliased_Present => True, | |
17e14451 | 5697 | Constant_Present => True, |
725a69d2 | 5698 | Object_Definition => |
5699 | Make_Subtype_Indication (Loc, | |
5700 | Subtype_Mark => New_Reference_To | |
5701 | (RTE (RE_Dispatch_Table_Wrapper), Loc), | |
5702 | Constraint => Make_Index_Or_Discriminant_Constraint (Loc, | |
5703 | Constraints => DT_Constr_List)), | |
5704 | Expression => Make_Aggregate (Loc, | |
5705 | Expressions => DT_Aggr_List))); | |
5706 | ||
5707 | Append_To (Result, | |
5708 | Make_Attribute_Definition_Clause (Loc, | |
5709 | Name => New_Reference_To (DT, Loc), | |
5710 | Chars => Name_Alignment, | |
5711 | Expression => | |
5712 | Make_Attribute_Reference (Loc, | |
5713 | Prefix => | |
5714 | New_Reference_To (RTE (RE_Integer_Address), Loc), | |
5715 | Attribute_Name => Name_Alignment))); | |
5716 | ||
24971415 | 5717 | Export_DT (Typ, DT); |
952af0b9 | 5718 | end if; |
76a1c25b | 5719 | end if; |
d62940bf | 5720 | |
f301a57b | 5721 | -- Initialize the table of ancestor tags if not building static |
5722 | -- dispatch table | |
725a69d2 | 5723 | |
24971415 | 5724 | if not Building_Static_DT (Typ) |
17e14451 | 5725 | and then not Is_Interface (Typ) |
725a69d2 | 5726 | and then not Is_CPP_Class (Typ) |
5727 | then | |
5728 | Append_To (Result, | |
5729 | Make_Assignment_Statement (Loc, | |
5730 | Name => | |
5731 | Make_Indexed_Component (Loc, | |
5732 | Prefix => | |
5733 | Make_Selected_Component (Loc, | |
5734 | Prefix => | |
5735 | New_Reference_To (TSD, Loc), | |
5736 | Selector_Name => | |
5737 | New_Reference_To | |
5738 | (RTE_Record_Component (RE_Tags_Table), Loc)), | |
5739 | Expressions => | |
5740 | New_List (Make_Integer_Literal (Loc, 0))), | |
5741 | ||
5742 | Expression => | |
5743 | New_Reference_To | |
5744 | (Node (First_Elmt (Access_Disp_Table (Typ))), Loc))); | |
5745 | end if; | |
5746 | ||
f301a57b | 5747 | -- Inherit the dispatch tables of the parent. There is no need to |
5748 | -- inherit anything from the parent when building static dispatch tables | |
5749 | -- because the whole dispatch table (including inherited primitives) has | |
5750 | -- been already built. | |
acf97c11 | 5751 | |
9a479e51 | 5752 | if Building_Static_DT (Typ) then |
725a69d2 | 5753 | null; |
5754 | ||
af647dc7 | 5755 | -- If the ancestor is a CPP_Class type we inherit the dispatch tables |
5756 | -- in the init proc, and we don't need to fill them in here. | |
d62940bf | 5757 | |
cc60bd16 | 5758 | elsif Is_CPP_Class (Parent_Typ) then |
af647dc7 | 5759 | null; |
d62940bf | 5760 | |
acf97c11 | 5761 | -- Otherwise we fill in the dispatch tables here |
d62940bf | 5762 | |
af647dc7 | 5763 | else |
cc60bd16 | 5764 | if Typ /= Parent_Typ |
af647dc7 | 5765 | and then not Is_Interface (Typ) |
5766 | and then not Restriction_Active (No_Dispatching_Calls) | |
68f95949 | 5767 | then |
343d35dc | 5768 | -- Inherit the dispatch table |
d62940bf | 5769 | |
acf97c11 | 5770 | if not Is_Interface (Typ) |
cc60bd16 | 5771 | and then not Is_Interface (Parent_Typ) |
5772 | and then not Is_CPP_Class (Parent_Typ) | |
acf97c11 | 5773 | then |
5774 | declare | |
5775 | Nb_Prims : constant Int := | |
5776 | UI_To_Int (DT_Entry_Count | |
cc60bd16 | 5777 | (First_Tag_Component (Parent_Typ))); |
5778 | ||
acf97c11 | 5779 | begin |
5780 | Append_To (Elab_Code, | |
5781 | Build_Inherit_Predefined_Prims (Loc, | |
5782 | Old_Tag_Node => | |
5783 | New_Reference_To | |
5784 | (Node | |
5785 | (Next_Elmt | |
5786 | (First_Elmt | |
cc60bd16 | 5787 | (Access_Disp_Table (Parent_Typ)))), Loc), |
acf97c11 | 5788 | New_Tag_Node => |
5789 | New_Reference_To | |
5790 | (Node | |
5791 | (Next_Elmt | |
5792 | (First_Elmt | |
5793 | (Access_Disp_Table (Typ)))), Loc))); | |
5794 | ||
5795 | if Nb_Prims /= 0 then | |
725a69d2 | 5796 | Append_To (Elab_Code, |
acf97c11 | 5797 | Build_Inherit_Prims (Loc, |
5798 | Typ => Typ, | |
5799 | Old_Tag_Node => | |
5800 | New_Reference_To | |
5801 | (Node | |
5802 | (First_Elmt | |
cc60bd16 | 5803 | (Access_Disp_Table (Parent_Typ))), Loc), |
acf97c11 | 5804 | New_Tag_Node => New_Reference_To (DT_Ptr, Loc), |
5805 | Num_Prims => Nb_Prims)); | |
5806 | end if; | |
5807 | end; | |
af647dc7 | 5808 | end if; |
d62940bf | 5809 | |
af647dc7 | 5810 | -- Inherit the secondary dispatch tables of the ancestor |
d62940bf | 5811 | |
cc60bd16 | 5812 | if not Is_CPP_Class (Parent_Typ) then |
af647dc7 | 5813 | declare |
5814 | Sec_DT_Ancestor : Elmt_Id := | |
5815 | Next_Elmt | |
acf97c11 | 5816 | (Next_Elmt |
af647dc7 | 5817 | (First_Elmt |
cc60bd16 | 5818 | (Access_Disp_Table (Parent_Typ)))); |
af647dc7 | 5819 | Sec_DT_Typ : Elmt_Id := |
5820 | Next_Elmt | |
acf97c11 | 5821 | (Next_Elmt |
5822 | (First_Elmt | |
5823 | (Access_Disp_Table (Typ)))); | |
af647dc7 | 5824 | |
5825 | procedure Copy_Secondary_DTs (Typ : Entity_Id); | |
5826 | -- Local procedure required to climb through the ancestors | |
5827 | -- and copy the contents of all their secondary dispatch | |
5828 | -- tables. | |
5829 | ||
5830 | ------------------------ | |
5831 | -- Copy_Secondary_DTs -- | |
5832 | ------------------------ | |
5833 | ||
5834 | procedure Copy_Secondary_DTs (Typ : Entity_Id) is | |
5835 | E : Entity_Id; | |
5836 | Iface : Elmt_Id; | |
5837 | ||
5838 | begin | |
5839 | -- Climb to the ancestor (if any) handling private types | |
5840 | ||
5841 | if Present (Full_View (Etype (Typ))) then | |
5842 | if Full_View (Etype (Typ)) /= Typ then | |
5843 | Copy_Secondary_DTs (Full_View (Etype (Typ))); | |
5844 | end if; | |
d62940bf | 5845 | |
af647dc7 | 5846 | elsif Etype (Typ) /= Typ then |
5847 | Copy_Secondary_DTs (Etype (Typ)); | |
5848 | end if; | |
d62940bf | 5849 | |
a652dd51 | 5850 | if Present (Interfaces (Typ)) |
5851 | and then not Is_Empty_Elmt_List (Interfaces (Typ)) | |
af647dc7 | 5852 | then |
a652dd51 | 5853 | Iface := First_Elmt (Interfaces (Typ)); |
af647dc7 | 5854 | E := First_Entity (Typ); |
5855 | while Present (E) | |
5856 | and then Present (Node (Sec_DT_Ancestor)) | |
725a69d2 | 5857 | and then Ekind (Node (Sec_DT_Ancestor)) = E_Constant |
af647dc7 | 5858 | loop |
5859 | if Is_Tag (E) and then Chars (E) /= Name_uTag then | |
cdb1c38f | 5860 | declare |
5861 | Num_Prims : constant Int := | |
5862 | UI_To_Int (DT_Entry_Count (E)); | |
5863 | ||
5864 | begin | |
5865 | if not Is_Interface (Etype (Typ)) then | |
5866 | ||
5867 | -- Inherit first secondary dispatch table | |
5868 | ||
5869 | Append_To (Elab_Code, | |
5870 | Build_Inherit_Predefined_Prims (Loc, | |
5871 | Old_Tag_Node => | |
5872 | Unchecked_Convert_To (RTE (RE_Tag), | |
acf97c11 | 5873 | New_Reference_To |
5874 | (Node | |
5875 | (Next_Elmt (Sec_DT_Ancestor)), | |
5876 | Loc)), | |
cdb1c38f | 5877 | New_Tag_Node => |
5878 | Unchecked_Convert_To (RTE (RE_Tag), | |
5879 | New_Reference_To | |
acf97c11 | 5880 | (Node (Next_Elmt (Sec_DT_Typ)), |
5881 | Loc)))); | |
cdb1c38f | 5882 | |
5883 | if Num_Prims /= 0 then | |
5884 | Append_To (Elab_Code, | |
5885 | Build_Inherit_Prims (Loc, | |
5886 | Typ => Node (Iface), | |
5887 | Old_Tag_Node => | |
5888 | Unchecked_Convert_To | |
5889 | (RTE (RE_Tag), | |
5890 | New_Reference_To | |
5891 | (Node (Sec_DT_Ancestor), | |
5892 | Loc)), | |
5893 | New_Tag_Node => | |
5894 | Unchecked_Convert_To | |
5895 | (RTE (RE_Tag), | |
5896 | New_Reference_To | |
5897 | (Node (Sec_DT_Typ), Loc)), | |
5898 | Num_Prims => Num_Prims)); | |
5899 | end if; | |
5900 | end if; | |
5901 | ||
5902 | Next_Elmt (Sec_DT_Ancestor); | |
5903 | Next_Elmt (Sec_DT_Typ); | |
343d35dc | 5904 | |
acf97c11 | 5905 | -- Skip the secondary dispatch table of |
5906 | -- predefined primitives | |
5907 | ||
5908 | Next_Elmt (Sec_DT_Ancestor); | |
5909 | Next_Elmt (Sec_DT_Typ); | |
5910 | ||
cdb1c38f | 5911 | if not Is_Interface (Etype (Typ)) then |
5912 | ||
5913 | -- Inherit second secondary dispatch table | |
343d35dc | 5914 | |
343d35dc | 5915 | Append_To (Elab_Code, |
5916 | Build_Inherit_Predefined_Prims (Loc, | |
5917 | Old_Tag_Node => | |
5918 | Unchecked_Convert_To (RTE (RE_Tag), | |
5919 | New_Reference_To | |
acf97c11 | 5920 | (Node |
5921 | (Next_Elmt (Sec_DT_Ancestor)), | |
5922 | Loc)), | |
343d35dc | 5923 | New_Tag_Node => |
5924 | Unchecked_Convert_To (RTE (RE_Tag), | |
5925 | New_Reference_To | |
acf97c11 | 5926 | (Node (Next_Elmt (Sec_DT_Typ)), |
5927 | Loc)))); | |
343d35dc | 5928 | |
5929 | if Num_Prims /= 0 then | |
5930 | Append_To (Elab_Code, | |
5931 | Build_Inherit_Prims (Loc, | |
17e14451 | 5932 | Typ => Node (Iface), |
343d35dc | 5933 | Old_Tag_Node => |
5934 | Unchecked_Convert_To | |
5935 | (RTE (RE_Tag), | |
5936 | New_Reference_To | |
5937 | (Node (Sec_DT_Ancestor), | |
5938 | Loc)), | |
5939 | New_Tag_Node => | |
5940 | Unchecked_Convert_To | |
5941 | (RTE (RE_Tag), | |
5942 | New_Reference_To | |
5943 | (Node (Sec_DT_Typ), Loc)), | |
17e14451 | 5944 | Num_Prims => Num_Prims)); |
343d35dc | 5945 | end if; |
cdb1c38f | 5946 | end if; |
5947 | end; | |
af647dc7 | 5948 | |
5949 | Next_Elmt (Sec_DT_Ancestor); | |
5950 | Next_Elmt (Sec_DT_Typ); | |
acf97c11 | 5951 | |
5952 | -- Skip the secondary dispatch table of | |
5953 | -- predefined primitives | |
5954 | ||
5955 | Next_Elmt (Sec_DT_Ancestor); | |
5956 | Next_Elmt (Sec_DT_Typ); | |
5957 | ||
af647dc7 | 5958 | Next_Elmt (Iface); |
5959 | end if; | |
d62940bf | 5960 | |
af647dc7 | 5961 | Next_Entity (E); |
5962 | end loop; | |
5963 | end if; | |
5964 | end Copy_Secondary_DTs; | |
d62940bf | 5965 | |
af647dc7 | 5966 | begin |
725a69d2 | 5967 | if Present (Node (Sec_DT_Ancestor)) |
5968 | and then Ekind (Node (Sec_DT_Ancestor)) = E_Constant | |
5969 | then | |
af647dc7 | 5970 | -- Handle private types |
76a1c25b | 5971 | |
af647dc7 | 5972 | if Present (Full_View (Typ)) then |
5973 | Copy_Secondary_DTs (Full_View (Typ)); | |
5974 | else | |
5975 | Copy_Secondary_DTs (Typ); | |
5976 | end if; | |
76a1c25b | 5977 | end if; |
af647dc7 | 5978 | end; |
5979 | end if; | |
76a1c25b | 5980 | end if; |
343d35dc | 5981 | end if; |
d62940bf | 5982 | |
343d35dc | 5983 | -- Generate code to register the Tag in the External_Tag hash table for |
5984 | -- the pure Ada type only. | |
d62940bf | 5985 | |
343d35dc | 5986 | -- Register_Tag (Dt_Ptr); |
d62940bf | 5987 | |
725a69d2 | 5988 | -- Skip this action in the following cases: |
5989 | -- 1) if Register_Tag is not available. | |
5990 | -- 2) in No_Run_Time mode. | |
2ea346ac | 5991 | -- 3) if Typ is not defined at the library level (this is required |
725a69d2 | 5992 | -- to avoid adding concurrency control to the hash table used |
5993 | -- by the run-time to register the tags). | |
d62940bf | 5994 | |
cdb1c38f | 5995 | if not No_Run_Time_Mode |
5996 | and then Is_Library_Level_Entity (Typ) | |
5997 | and then RTE_Available (RE_Register_Tag) | |
5998 | then | |
725a69d2 | 5999 | Append_To (Elab_Code, |
cdb1c38f | 6000 | Make_Procedure_Call_Statement (Loc, |
6001 | Name => New_Reference_To (RTE (RE_Register_Tag), Loc), | |
6002 | Parameter_Associations => | |
6003 | New_List (New_Reference_To (DT_Ptr, Loc)))); | |
d62940bf | 6004 | end if; |
6005 | ||
2ea346ac | 6006 | if not Is_Empty_List (Elab_Code) then |
6007 | Append_List_To (Result, Elab_Code); | |
6008 | end if; | |
cdb1c38f | 6009 | |
f38c8084 | 6010 | -- Populate the two auxiliary tables used for dispatching asynchronous, |
6011 | -- conditional and timed selects for synchronized types that implement | |
6012 | -- a limited interface. Skip this step in Ravenscar profile or when | |
6013 | -- general dispatching is forbidden. | |
17e14451 | 6014 | |
de54c5ab | 6015 | if Ada_Version >= Ada_2005 |
17e14451 | 6016 | and then Is_Concurrent_Record_Type (Typ) |
a652dd51 | 6017 | and then Has_Interfaces (Typ) |
f38c8084 | 6018 | and then not Restriction_Active (No_Dispatching_Calls) |
6019 | and then not Restriction_Active (No_Select_Statements) | |
17e14451 | 6020 | then |
6021 | Append_List_To (Result, | |
6022 | Make_Select_Specific_Data_Table (Typ)); | |
6023 | end if; | |
6024 | ||
cc60bd16 | 6025 | -- Remember entities containing dispatch tables |
acf97c11 | 6026 | |
cc60bd16 | 6027 | Append_Elmt (Predef_Prims, DT_Decl); |
6028 | Append_Elmt (DT, DT_Decl); | |
acf97c11 | 6029 | |
725a69d2 | 6030 | Analyze_List (Result, Suppress => All_Checks); |
17e14451 | 6031 | Set_Has_Dispatch_Table (Typ); |
6032 | ||
f301a57b | 6033 | -- Mark entities containing dispatch tables. Required by the backend to |
6034 | -- handle them properly. | |
cc60bd16 | 6035 | |
925c2ba1 | 6036 | if Has_DT (Typ) then |
cc60bd16 | 6037 | declare |
6038 | Elmt : Elmt_Id; | |
6039 | ||
6040 | begin | |
6041 | -- Ensure that entities Prim_Ptr and Predef_Prims_Table_Ptr have | |
6042 | -- the decoration required by the backend | |
6043 | ||
6044 | Set_Is_Dispatch_Table_Entity (RTE (RE_Prim_Ptr)); | |
6045 | Set_Is_Dispatch_Table_Entity (RTE (RE_Predef_Prims_Table_Ptr)); | |
6046 | ||
6047 | -- Object declarations | |
6048 | ||
6049 | Elmt := First_Elmt (DT_Decl); | |
6050 | while Present (Elmt) loop | |
6051 | Set_Is_Dispatch_Table_Entity (Node (Elmt)); | |
6052 | pragma Assert (Ekind (Etype (Node (Elmt))) = E_Array_Subtype | |
6053 | or else Ekind (Etype (Node (Elmt))) = E_Record_Subtype); | |
6054 | Set_Is_Dispatch_Table_Entity (Etype (Node (Elmt))); | |
6055 | Next_Elmt (Elmt); | |
6056 | end loop; | |
6057 | ||
6058 | -- Aggregates initializing dispatch tables | |
6059 | ||
6060 | Elmt := First_Elmt (DT_Aggr); | |
6061 | while Present (Elmt) loop | |
6062 | Set_Is_Dispatch_Table_Entity (Etype (Node (Elmt))); | |
6063 | Next_Elmt (Elmt); | |
6064 | end loop; | |
6065 | end; | |
6066 | end if; | |
6067 | ||
e00e091c | 6068 | -- Register the tagged type in the call graph nodes table |
6069 | ||
6070 | Register_CG_Node (Typ); | |
6071 | ||
76a1c25b | 6072 | return Result; |
6073 | end Make_DT; | |
d62940bf | 6074 | |
76a1c25b | 6075 | ------------------------------------- |
6076 | -- Make_Select_Specific_Data_Table -- | |
6077 | ------------------------------------- | |
d62940bf | 6078 | |
76a1c25b | 6079 | function Make_Select_Specific_Data_Table |
6080 | (Typ : Entity_Id) return List_Id | |
6081 | is | |
6082 | Assignments : constant List_Id := New_List; | |
6083 | Loc : constant Source_Ptr := Sloc (Typ); | |
d62940bf | 6084 | |
68f95949 | 6085 | Conc_Typ : Entity_Id; |
6086 | Decls : List_Id; | |
6087 | DT_Ptr : Entity_Id; | |
6088 | Prim : Entity_Id; | |
6089 | Prim_Als : Entity_Id; | |
6090 | Prim_Elmt : Elmt_Id; | |
6091 | Prim_Pos : Uint; | |
343d35dc | 6092 | Nb_Prim : Nat := 0; |
d62940bf | 6093 | |
76a1c25b | 6094 | type Examined_Array is array (Int range <>) of Boolean; |
d62940bf | 6095 | |
76a1c25b | 6096 | function Find_Entry_Index (E : Entity_Id) return Uint; |
6097 | -- Given an entry, find its index in the visible declarations of the | |
6098 | -- corresponding concurrent type of Typ. | |
d62940bf | 6099 | |
76a1c25b | 6100 | ---------------------- |
6101 | -- Find_Entry_Index -- | |
6102 | ---------------------- | |
d62940bf | 6103 | |
76a1c25b | 6104 | function Find_Entry_Index (E : Entity_Id) return Uint is |
6105 | Index : Uint := Uint_1; | |
6106 | Subp_Decl : Entity_Id; | |
d62940bf | 6107 | |
76a1c25b | 6108 | begin |
6109 | if Present (Decls) | |
6110 | and then not Is_Empty_List (Decls) | |
6111 | then | |
6112 | Subp_Decl := First (Decls); | |
6113 | while Present (Subp_Decl) loop | |
6114 | if Nkind (Subp_Decl) = N_Entry_Declaration then | |
6115 | if Defining_Identifier (Subp_Decl) = E then | |
6116 | return Index; | |
6117 | end if; | |
d62940bf | 6118 | |
76a1c25b | 6119 | Index := Index + 1; |
6120 | end if; | |
d62940bf | 6121 | |
76a1c25b | 6122 | Next (Subp_Decl); |
6123 | end loop; | |
6124 | end if; | |
d62940bf | 6125 | |
76a1c25b | 6126 | return Uint_0; |
6127 | end Find_Entry_Index; | |
6128 | ||
6129 | -- Start of processing for Make_Select_Specific_Data_Table | |
6130 | ||
6131 | begin | |
68f95949 | 6132 | pragma Assert (not Restriction_Active (No_Dispatching_Calls)); |
6133 | ||
76a1c25b | 6134 | DT_Ptr := Node (First_Elmt (Access_Disp_Table (Typ))); |
d62940bf | 6135 | |
76a1c25b | 6136 | if Present (Corresponding_Concurrent_Type (Typ)) then |
6137 | Conc_Typ := Corresponding_Concurrent_Type (Typ); | |
6138 | ||
17e14451 | 6139 | if Present (Full_View (Conc_Typ)) then |
6140 | Conc_Typ := Full_View (Conc_Typ); | |
6141 | end if; | |
6142 | ||
76a1c25b | 6143 | if Ekind (Conc_Typ) = E_Protected_Type then |
6144 | Decls := Visible_Declarations (Protected_Definition ( | |
6145 | Parent (Conc_Typ))); | |
d62940bf | 6146 | else |
6147 | pragma Assert (Ekind (Conc_Typ) = E_Task_Type); | |
76a1c25b | 6148 | Decls := Visible_Declarations (Task_Definition ( |
6149 | Parent (Conc_Typ))); | |
6150 | end if; | |
6151 | end if; | |
d62940bf | 6152 | |
76a1c25b | 6153 | -- Count the non-predefined primitive operations |
d62940bf | 6154 | |
76a1c25b | 6155 | Prim_Elmt := First_Elmt (Primitive_Operations (Typ)); |
6156 | while Present (Prim_Elmt) loop | |
af647dc7 | 6157 | Prim := Node (Prim_Elmt); |
6158 | ||
6159 | if not (Is_Predefined_Dispatching_Operation (Prim) | |
6160 | or else Is_Predefined_Dispatching_Alias (Prim)) | |
6161 | then | |
76a1c25b | 6162 | Nb_Prim := Nb_Prim + 1; |
6163 | end if; | |
d62940bf | 6164 | |
76a1c25b | 6165 | Next_Elmt (Prim_Elmt); |
6166 | end loop; | |
d62940bf | 6167 | |
76a1c25b | 6168 | declare |
68f95949 | 6169 | Examined : Examined_Array (1 .. Nb_Prim) := (others => False); |
d62940bf | 6170 | |
76a1c25b | 6171 | begin |
6172 | Prim_Elmt := First_Elmt (Primitive_Operations (Typ)); | |
6173 | while Present (Prim_Elmt) loop | |
6174 | Prim := Node (Prim_Elmt); | |
d62940bf | 6175 | |
af647dc7 | 6176 | -- Look for primitive overriding an abstract interface subprogram |
d62940bf | 6177 | |
a652dd51 | 6178 | if Present (Interface_Alias (Prim)) |
c8da6114 | 6179 | and then not |
6180 | Is_Ancestor | |
6181 | (Find_Dispatching_Type (Interface_Alias (Prim)), Typ) | |
af647dc7 | 6182 | and then not Examined (UI_To_Int (DT_Position (Alias (Prim)))) |
6183 | then | |
6184 | Prim_Pos := DT_Position (Alias (Prim)); | |
6185 | pragma Assert (UI_To_Int (Prim_Pos) <= Nb_Prim); | |
6186 | Examined (UI_To_Int (Prim_Pos)) := True; | |
d62940bf | 6187 | |
af647dc7 | 6188 | -- Set the primitive operation kind regardless of subprogram |
6189 | -- type. Generate: | |
6190 | -- Ada.Tags.Set_Prim_Op_Kind (DT_Ptr, <position>, <kind>); | |
d62940bf | 6191 | |
af647dc7 | 6192 | Append_To (Assignments, |
725a69d2 | 6193 | Make_Procedure_Call_Statement (Loc, |
6194 | Name => New_Reference_To (RTE (RE_Set_Prim_Op_Kind), Loc), | |
6195 | Parameter_Associations => New_List ( | |
6196 | New_Reference_To (DT_Ptr, Loc), | |
6197 | Make_Integer_Literal (Loc, Prim_Pos), | |
6198 | Prim_Op_Kind (Alias (Prim), Typ)))); | |
68f95949 | 6199 | |
af647dc7 | 6200 | -- Retrieve the root of the alias chain |
68f95949 | 6201 | |
fc2907f6 | 6202 | Prim_Als := Ultimate_Alias (Prim); |
68f95949 | 6203 | |
af647dc7 | 6204 | -- In the case of an entry wrapper, set the entry index |
68f95949 | 6205 | |
af647dc7 | 6206 | if Ekind (Prim) = E_Procedure |
6207 | and then Is_Primitive_Wrapper (Prim_Als) | |
6208 | and then Ekind (Wrapped_Entity (Prim_Als)) = E_Entry | |
6209 | then | |
6210 | -- Generate: | |
6211 | -- Ada.Tags.Set_Entry_Index | |
6212 | -- (DT_Ptr, <position>, <index>); | |
68f95949 | 6213 | |
af647dc7 | 6214 | Append_To (Assignments, |
725a69d2 | 6215 | Make_Procedure_Call_Statement (Loc, |
6216 | Name => | |
6217 | New_Reference_To (RTE (RE_Set_Entry_Index), Loc), | |
6218 | Parameter_Associations => New_List ( | |
6219 | New_Reference_To (DT_Ptr, Loc), | |
6220 | Make_Integer_Literal (Loc, Prim_Pos), | |
6221 | Make_Integer_Literal (Loc, | |
6222 | Find_Entry_Index (Wrapped_Entity (Prim_Als)))))); | |
76a1c25b | 6223 | end if; |
6224 | end if; | |
6225 | ||
76a1c25b | 6226 | Next_Elmt (Prim_Elmt); |
6227 | end loop; | |
6228 | end; | |
6229 | ||
6230 | return Assignments; | |
6231 | end Make_Select_Specific_Data_Table; | |
d62940bf | 6232 | |
17e14451 | 6233 | --------------- |
6234 | -- Make_Tags -- | |
6235 | --------------- | |
6236 | ||
6237 | function Make_Tags (Typ : Entity_Id) return List_Id is | |
f301a57b | 6238 | Loc : constant Source_Ptr := Sloc (Typ); |
6239 | Result : constant List_Id := New_List; | |
6240 | ||
6241 | procedure Import_DT | |
6242 | (Tag_Typ : Entity_Id; | |
6243 | DT : Entity_Id; | |
6244 | Is_Secondary_DT : Boolean); | |
6245 | -- Import the dispatch table DT of tagged type Tag_Typ. Required to | |
6246 | -- generate forward references and statically allocate the table. For | |
6247 | -- primary dispatch tables that require no dispatch table generate: | |
d03ada96 | 6248 | |
f301a57b | 6249 | -- DT : static aliased constant Non_Dispatch_Table_Wrapper; |
d03ada96 | 6250 | -- pragma Import (Ada, DT); |
6251 | ||
f301a57b | 6252 | -- Otherwise generate: |
d03ada96 | 6253 | |
f301a57b | 6254 | -- DT : static aliased constant Dispatch_Table_Wrapper (Nb_Prim); |
d03ada96 | 6255 | -- pragma Import (Ada, DT); |
7854e190 | 6256 | |
f301a57b | 6257 | --------------- |
6258 | -- Import_DT -- | |
6259 | --------------- | |
24971415 | 6260 | |
f301a57b | 6261 | procedure Import_DT |
6262 | (Tag_Typ : Entity_Id; | |
6263 | DT : Entity_Id; | |
6264 | Is_Secondary_DT : Boolean) | |
6265 | is | |
6266 | DT_Constr_List : List_Id; | |
6267 | Nb_Prim : Nat; | |
24971415 | 6268 | |
f301a57b | 6269 | begin |
6270 | Set_Is_Imported (DT); | |
6271 | Set_Ekind (DT, E_Constant); | |
6272 | Set_Related_Type (DT, Typ); | |
24971415 | 6273 | |
24971415 | 6274 | -- The scope must be set now to call Get_External_Name |
6275 | ||
6276 | Set_Scope (DT, Current_Scope); | |
6277 | ||
6278 | Get_External_Name (DT, True); | |
6279 | Set_Interface_Name (DT, | |
d03ada96 | 6280 | Make_String_Literal (Loc, Strval => String_From_Name_Buffer)); |
17e14451 | 6281 | |
24971415 | 6282 | -- Ensure proper Sprint output of this implicit importation |
17e14451 | 6283 | |
24971415 | 6284 | Set_Is_Internal (DT); |
17e14451 | 6285 | |
24971415 | 6286 | -- Save this entity to allow Make_DT to generate its exportation |
6287 | ||
f301a57b | 6288 | Append_Elmt (DT, Dispatch_Table_Wrappers (Typ)); |
24971415 | 6289 | |
f301a57b | 6290 | -- No dispatch table required |
acf97c11 | 6291 | |
d03ada96 | 6292 | if not Is_Secondary_DT and then not Has_DT (Tag_Typ) then |
f301a57b | 6293 | Append_To (Result, |
6294 | Make_Object_Declaration (Loc, | |
6295 | Defining_Identifier => DT, | |
6296 | Aliased_Present => True, | |
6297 | Constant_Present => True, | |
6298 | Object_Definition => | |
6299 | New_Reference_To (RTE (RE_No_Dispatch_Table_Wrapper), Loc))); | |
6300 | ||
6301 | else | |
24971415 | 6302 | -- Calculate the number of primitives of the dispatch table and |
6303 | -- the size of the Type_Specific_Data record. | |
6304 | ||
f301a57b | 6305 | Nb_Prim := |
6306 | UI_To_Int (DT_Entry_Count (First_Tag_Component (Tag_Typ))); | |
24971415 | 6307 | |
d03ada96 | 6308 | -- If the tagged type has no primitives we add a dummy slot whose |
6309 | -- address will be the tag of this type. | |
24971415 | 6310 | |
6311 | if Nb_Prim = 0 then | |
6312 | DT_Constr_List := | |
6313 | New_List (Make_Integer_Literal (Loc, 1)); | |
6314 | else | |
6315 | DT_Constr_List := | |
6316 | New_List (Make_Integer_Literal (Loc, Nb_Prim)); | |
6317 | end if; | |
6318 | ||
6319 | Append_To (Result, | |
6320 | Make_Object_Declaration (Loc, | |
6321 | Defining_Identifier => DT, | |
6322 | Aliased_Present => True, | |
6323 | Constant_Present => True, | |
6324 | Object_Definition => | |
6325 | Make_Subtype_Indication (Loc, | |
6326 | Subtype_Mark => | |
6327 | New_Reference_To (RTE (RE_Dispatch_Table_Wrapper), Loc), | |
6328 | Constraint => Make_Index_Or_Discriminant_Constraint (Loc, | |
6329 | Constraints => DT_Constr_List)))); | |
f301a57b | 6330 | end if; |
6331 | end Import_DT; | |
6332 | ||
6333 | -- Local variables | |
6334 | ||
6335 | Tname : constant Name_Id := Chars (Typ); | |
6336 | AI_Tag_Comp : Elmt_Id; | |
7640ed3d | 6337 | DT : Node_Id := Empty; |
f301a57b | 6338 | DT_Ptr : Node_Id; |
6339 | Predef_Prims_Ptr : Node_Id; | |
d04be62f | 6340 | Iface_DT : Node_Id := Empty; |
f301a57b | 6341 | Iface_DT_Ptr : Node_Id; |
d215f619 | 6342 | New_Node : Node_Id; |
f301a57b | 6343 | Suffix_Index : Int; |
6344 | Typ_Name : Name_Id; | |
6345 | Typ_Comps : Elist_Id; | |
6346 | ||
6347 | -- Start of processing for Make_Tags | |
6348 | ||
6349 | begin | |
d00681a7 | 6350 | pragma Assert (No (Access_Disp_Table (Typ))); |
6351 | Set_Access_Disp_Table (Typ, New_Elmt_List); | |
f301a57b | 6352 | |
6353 | -- 1) Generate the primary tag entities | |
6354 | ||
6355 | -- Primary dispatch table containing user-defined primitives | |
6356 | ||
d00681a7 | 6357 | DT_Ptr := Make_Defining_Identifier (Loc, New_External_Name (Tname, 'P')); |
6358 | Set_Etype (DT_Ptr, RTE (RE_Tag)); | |
6359 | Append_Elmt (DT_Ptr, Access_Disp_Table (Typ)); | |
f301a57b | 6360 | |
d00681a7 | 6361 | -- Minimum decoration |
f301a57b | 6362 | |
d00681a7 | 6363 | Set_Ekind (DT_Ptr, E_Variable); |
6364 | Set_Related_Type (DT_Ptr, Typ); | |
f301a57b | 6365 | |
d00681a7 | 6366 | -- For CPP types there is no need to build the dispatch tables since |
5682f43c | 6367 | -- they are imported from the C++ side. If the CPP type has an IP then |
6368 | -- we declare now the variable that will store the copy of the C++ tag. | |
d03ada96 | 6369 | -- If the CPP type is an interface, we need the variable as well because |
6370 | -- it becomes the pointer to the corresponding secondary table. | |
f301a57b | 6371 | |
d00681a7 | 6372 | if Is_CPP_Class (Typ) then |
5682f43c | 6373 | if Has_CPP_Constructors (Typ) or else Is_Interface (Typ) then |
24971415 | 6374 | Append_To (Result, |
6375 | Make_Object_Declaration (Loc, | |
6376 | Defining_Identifier => DT_Ptr, | |
24971415 | 6377 | Object_Definition => New_Reference_To (RTE (RE_Tag), Loc), |
6378 | Expression => | |
6379 | Unchecked_Convert_To (RTE (RE_Tag), | |
d00681a7 | 6380 | New_Reference_To (RTE (RE_Null_Address), Loc)))); |
24971415 | 6381 | |
d00681a7 | 6382 | Set_Is_Statically_Allocated (DT_Ptr, |
6383 | Is_Library_Level_Tagged_Type (Typ)); | |
6384 | end if; | |
9af28f61 | 6385 | |
d00681a7 | 6386 | -- Ada types |
3dbca0d5 | 6387 | |
d00681a7 | 6388 | else |
6389 | -- Primary dispatch table containing predefined primitives | |
acf97c11 | 6390 | |
d00681a7 | 6391 | Predef_Prims_Ptr := |
6392 | Make_Defining_Identifier (Loc, | |
6393 | Chars => New_External_Name (Tname, 'Y')); | |
6394 | Set_Etype (Predef_Prims_Ptr, RTE (RE_Address)); | |
6395 | Append_Elmt (Predef_Prims_Ptr, Access_Disp_Table (Typ)); | |
24971415 | 6396 | |
d00681a7 | 6397 | -- Import the forward declaration of the Dispatch Table wrapper |
d03ada96 | 6398 | -- record (Make_DT will take care of exporting it). |
24971415 | 6399 | |
d00681a7 | 6400 | if Building_Static_DT (Typ) then |
6401 | Set_Dispatch_Table_Wrappers (Typ, New_Elmt_List); | |
17e14451 | 6402 | |
d00681a7 | 6403 | DT := |
6404 | Make_Defining_Identifier (Loc, | |
6405 | Chars => New_External_Name (Tname, 'T')); | |
6406 | ||
6407 | Import_DT (Typ, DT, Is_Secondary_DT => False); | |
6408 | ||
6409 | if Has_DT (Typ) then | |
6410 | Append_To (Result, | |
6411 | Make_Object_Declaration (Loc, | |
6412 | Defining_Identifier => DT_Ptr, | |
6413 | Constant_Present => True, | |
6414 | Object_Definition => New_Reference_To (RTE (RE_Tag), Loc), | |
6415 | Expression => | |
6416 | Unchecked_Convert_To (RTE (RE_Tag), | |
6417 | Make_Attribute_Reference (Loc, | |
6418 | Prefix => | |
6419 | Make_Selected_Component (Loc, | |
6420 | Prefix => New_Reference_To (DT, Loc), | |
6421 | Selector_Name => | |
6422 | New_Occurrence_Of | |
6423 | (RTE_Record_Component (RE_Prims_Ptr), Loc)), | |
6424 | Attribute_Name => Name_Address)))); | |
6425 | ||
6426 | -- Generate the SCIL node for the previous object declaration | |
6427 | -- because it has a tag initialization. | |
6428 | ||
6429 | if Generate_SCIL then | |
6430 | New_Node := | |
6431 | Make_SCIL_Dispatch_Table_Tag_Init (Sloc (Last (Result))); | |
6432 | Set_SCIL_Entity (New_Node, Typ); | |
6433 | Set_SCIL_Node (Last (Result), New_Node); | |
6434 | end if; | |
6435 | ||
6436 | Append_To (Result, | |
6437 | Make_Object_Declaration (Loc, | |
6438 | Defining_Identifier => Predef_Prims_Ptr, | |
6439 | Constant_Present => True, | |
6440 | Object_Definition => New_Reference_To | |
6441 | (RTE (RE_Address), Loc), | |
6442 | Expression => | |
6443 | Make_Attribute_Reference (Loc, | |
6444 | Prefix => | |
6445 | Make_Selected_Component (Loc, | |
6446 | Prefix => New_Reference_To (DT, Loc), | |
6447 | Selector_Name => | |
6448 | New_Occurrence_Of | |
6449 | (RTE_Record_Component (RE_Predef_Prims), Loc)), | |
6450 | Attribute_Name => Name_Address))); | |
6451 | ||
6452 | -- No dispatch table required | |
6453 | ||
6454 | else | |
6455 | Append_To (Result, | |
6456 | Make_Object_Declaration (Loc, | |
6457 | Defining_Identifier => DT_Ptr, | |
6458 | Constant_Present => True, | |
6459 | Object_Definition => New_Reference_To (RTE (RE_Tag), Loc), | |
6460 | Expression => | |
6461 | Unchecked_Convert_To (RTE (RE_Tag), | |
6462 | Make_Attribute_Reference (Loc, | |
6463 | Prefix => | |
6464 | Make_Selected_Component (Loc, | |
6465 | Prefix => New_Reference_To (DT, Loc), | |
6466 | Selector_Name => | |
6467 | New_Occurrence_Of | |
6468 | (RTE_Record_Component (RE_NDT_Prims_Ptr), Loc)), | |
6469 | Attribute_Name => Name_Address)))); | |
6470 | end if; | |
6471 | ||
6472 | Set_Is_True_Constant (DT_Ptr); | |
6473 | Set_Is_Statically_Allocated (DT_Ptr); | |
6474 | end if; | |
6475 | end if; | |
17e14451 | 6476 | |
6477 | -- 2) Generate the secondary tag entities | |
6478 | ||
d00681a7 | 6479 | -- Collect the components associated with secondary dispatch tables |
6480 | ||
a652dd51 | 6481 | if Has_Interfaces (Typ) then |
d00681a7 | 6482 | Collect_Interface_Components (Typ, Typ_Comps); |
f301a57b | 6483 | |
d03ada96 | 6484 | -- For each interface type we build a unique external name associated |
6485 | -- with its secondary dispatch table. This name is used to declare an | |
6486 | -- object that references this secondary dispatch table, whose value | |
6487 | -- will be used for the elaboration of Typ objects, and also for the | |
6488 | -- elaboration of objects of types derived from Typ that do not | |
6489 | -- override the primitives of this interface type. | |
f301a57b | 6490 | |
6491 | Suffix_Index := 1; | |
17e14451 | 6492 | |
d00681a7 | 6493 | -- Note: The value of Suffix_Index must be in sync with the |
6494 | -- Suffix_Index values of secondary dispatch tables generated | |
6495 | -- by Make_DT. | |
17e14451 | 6496 | |
d00681a7 | 6497 | if Is_CPP_Class (Typ) then |
6498 | AI_Tag_Comp := First_Elmt (Typ_Comps); | |
6499 | while Present (AI_Tag_Comp) loop | |
6500 | Get_Secondary_DT_External_Name | |
6501 | (Typ, Related_Type (Node (AI_Tag_Comp)), Suffix_Index); | |
6502 | Typ_Name := Name_Find; | |
17e14451 | 6503 | |
d00681a7 | 6504 | -- Declare variables that will store the copy of the C++ |
d03ada96 | 6505 | -- secondary tags. |
f301a57b | 6506 | |
d00681a7 | 6507 | Iface_DT_Ptr := |
6508 | Make_Defining_Identifier (Loc, | |
6509 | Chars => New_External_Name (Typ_Name, 'P')); | |
6510 | Set_Etype (Iface_DT_Ptr, RTE (RE_Interface_Tag)); | |
6511 | Set_Ekind (Iface_DT_Ptr, E_Variable); | |
6512 | Set_Is_Tag (Iface_DT_Ptr); | |
acf97c11 | 6513 | |
d00681a7 | 6514 | Set_Has_Thunks (Iface_DT_Ptr); |
6515 | Set_Related_Type | |
6516 | (Iface_DT_Ptr, Related_Type (Node (AI_Tag_Comp))); | |
6517 | Append_Elmt (Iface_DT_Ptr, Access_Disp_Table (Typ)); | |
cdb1c38f | 6518 | |
f301a57b | 6519 | Append_To (Result, |
6520 | Make_Object_Declaration (Loc, | |
6521 | Defining_Identifier => Iface_DT_Ptr, | |
f301a57b | 6522 | Object_Definition => New_Reference_To |
6523 | (RTE (RE_Interface_Tag), Loc), | |
6524 | Expression => | |
6525 | Unchecked_Convert_To (RTE (RE_Interface_Tag), | |
d00681a7 | 6526 | New_Reference_To (RTE (RE_Null_Address), Loc)))); |
f301a57b | 6527 | |
d00681a7 | 6528 | Set_Is_Statically_Allocated (Iface_DT_Ptr, |
6529 | Is_Library_Level_Tagged_Type (Typ)); | |
acf97c11 | 6530 | |
d00681a7 | 6531 | Next_Elmt (AI_Tag_Comp); |
6532 | end loop; | |
acf97c11 | 6533 | |
d00681a7 | 6534 | -- This is not a CPP_Class type |
acf97c11 | 6535 | |
d00681a7 | 6536 | else |
6537 | AI_Tag_Comp := First_Elmt (Typ_Comps); | |
6538 | while Present (AI_Tag_Comp) loop | |
6539 | Get_Secondary_DT_External_Name | |
6540 | (Typ, Related_Type (Node (AI_Tag_Comp)), Suffix_Index); | |
6541 | Typ_Name := Name_Find; | |
17e14451 | 6542 | |
d00681a7 | 6543 | if Building_Static_DT (Typ) then |
6544 | Iface_DT := | |
6545 | Make_Defining_Identifier (Loc, | |
6546 | Chars => New_External_Name | |
6547 | (Typ_Name, 'T', Suffix_Index => -1)); | |
6548 | Import_DT | |
6549 | (Tag_Typ => Related_Type (Node (AI_Tag_Comp)), | |
6550 | DT => Iface_DT, | |
6551 | Is_Secondary_DT => True); | |
6552 | end if; | |
acf97c11 | 6553 | |
d00681a7 | 6554 | -- Secondary dispatch table referencing thunks to user-defined |
6555 | -- primitives covered by this interface. | |
acf97c11 | 6556 | |
d00681a7 | 6557 | Iface_DT_Ptr := |
6558 | Make_Defining_Identifier (Loc, | |
6559 | Chars => New_External_Name (Typ_Name, 'P')); | |
6560 | Set_Etype (Iface_DT_Ptr, RTE (RE_Interface_Tag)); | |
6561 | Set_Ekind (Iface_DT_Ptr, E_Constant); | |
6562 | Set_Is_Tag (Iface_DT_Ptr); | |
6563 | Set_Has_Thunks (Iface_DT_Ptr); | |
6564 | Set_Is_Statically_Allocated (Iface_DT_Ptr, | |
6565 | Is_Library_Level_Tagged_Type (Typ)); | |
6566 | Set_Is_True_Constant (Iface_DT_Ptr); | |
6567 | Set_Related_Type | |
6568 | (Iface_DT_Ptr, Related_Type (Node (AI_Tag_Comp))); | |
6569 | Append_Elmt (Iface_DT_Ptr, Access_Disp_Table (Typ)); | |
6570 | ||
6571 | if Building_Static_DT (Typ) then | |
6572 | Append_To (Result, | |
6573 | Make_Object_Declaration (Loc, | |
6574 | Defining_Identifier => Iface_DT_Ptr, | |
6575 | Constant_Present => True, | |
6576 | Object_Definition => New_Reference_To | |
6577 | (RTE (RE_Interface_Tag), Loc), | |
6578 | Expression => | |
6579 | Unchecked_Convert_To (RTE (RE_Interface_Tag), | |
6580 | Make_Attribute_Reference (Loc, | |
6581 | Prefix => | |
6582 | Make_Selected_Component (Loc, | |
6583 | Prefix => New_Reference_To (Iface_DT, Loc), | |
6584 | Selector_Name => | |
6585 | New_Occurrence_Of | |
6586 | (RTE_Record_Component (RE_Prims_Ptr), Loc)), | |
6587 | Attribute_Name => Name_Address)))); | |
6588 | end if; | |
6589 | ||
6590 | -- Secondary dispatch table referencing thunks to predefined | |
6591 | -- primitives. | |
6592 | ||
6593 | Iface_DT_Ptr := | |
6594 | Make_Defining_Identifier (Loc, | |
6595 | Chars => New_External_Name (Typ_Name, 'Y')); | |
6596 | Set_Etype (Iface_DT_Ptr, RTE (RE_Address)); | |
6597 | Set_Ekind (Iface_DT_Ptr, E_Constant); | |
6598 | Set_Is_Tag (Iface_DT_Ptr); | |
6599 | Set_Has_Thunks (Iface_DT_Ptr); | |
6600 | Set_Is_Statically_Allocated (Iface_DT_Ptr, | |
6601 | Is_Library_Level_Tagged_Type (Typ)); | |
6602 | Set_Is_True_Constant (Iface_DT_Ptr); | |
6603 | Set_Related_Type | |
6604 | (Iface_DT_Ptr, Related_Type (Node (AI_Tag_Comp))); | |
6605 | Append_Elmt (Iface_DT_Ptr, Access_Disp_Table (Typ)); | |
6606 | ||
6607 | -- Secondary dispatch table referencing user-defined primitives | |
6608 | -- covered by this interface. | |
6609 | ||
6610 | Iface_DT_Ptr := | |
6611 | Make_Defining_Identifier (Loc, | |
6612 | Chars => New_External_Name (Typ_Name, 'D')); | |
6613 | Set_Etype (Iface_DT_Ptr, RTE (RE_Interface_Tag)); | |
6614 | Set_Ekind (Iface_DT_Ptr, E_Constant); | |
6615 | Set_Is_Tag (Iface_DT_Ptr); | |
6616 | Set_Is_Statically_Allocated (Iface_DT_Ptr, | |
6617 | Is_Library_Level_Tagged_Type (Typ)); | |
6618 | Set_Is_True_Constant (Iface_DT_Ptr); | |
6619 | Set_Related_Type | |
6620 | (Iface_DT_Ptr, Related_Type (Node (AI_Tag_Comp))); | |
6621 | Append_Elmt (Iface_DT_Ptr, Access_Disp_Table (Typ)); | |
6622 | ||
6623 | -- Secondary dispatch table referencing predefined primitives | |
6624 | ||
6625 | Iface_DT_Ptr := | |
6626 | Make_Defining_Identifier (Loc, | |
6627 | Chars => New_External_Name (Typ_Name, 'Z')); | |
6628 | Set_Etype (Iface_DT_Ptr, RTE (RE_Address)); | |
6629 | Set_Ekind (Iface_DT_Ptr, E_Constant); | |
6630 | Set_Is_Tag (Iface_DT_Ptr); | |
6631 | Set_Is_Statically_Allocated (Iface_DT_Ptr, | |
6632 | Is_Library_Level_Tagged_Type (Typ)); | |
6633 | Set_Is_True_Constant (Iface_DT_Ptr); | |
6634 | Set_Related_Type | |
6635 | (Iface_DT_Ptr, Related_Type (Node (AI_Tag_Comp))); | |
6636 | Append_Elmt (Iface_DT_Ptr, Access_Disp_Table (Typ)); | |
6637 | ||
6638 | Next_Elmt (AI_Tag_Comp); | |
6639 | end loop; | |
6640 | end if; | |
17e14451 | 6641 | end if; |
6642 | ||
dffd0a90 | 6643 | -- 3) At the end of Access_Disp_Table, if the type has user-defined |
6644 | -- primitives, we add the entity of an access type declaration that | |
6645 | -- is used by Build_Get_Prim_Op_Address to expand dispatching calls | |
6646 | -- through the primary dispatch table. | |
6647 | ||
6648 | if UI_To_Int (DT_Entry_Count (First_Tag_Component (Typ))) = 0 then | |
6649 | Analyze_List (Result); | |
17e14451 | 6650 | |
6651 | -- Generate: | |
cc60bd16 | 6652 | -- type Typ_DT is array (1 .. Nb_Prims) of Prim_Ptr; |
17e14451 | 6653 | -- type Typ_DT_Acc is access Typ_DT; |
6654 | ||
dffd0a90 | 6655 | else |
6656 | declare | |
6657 | Name_DT_Prims : constant Name_Id := | |
6658 | New_External_Name (Tname, 'G'); | |
6659 | Name_DT_Prims_Acc : constant Name_Id := | |
6660 | New_External_Name (Tname, 'H'); | |
6661 | DT_Prims : constant Entity_Id := | |
6662 | Make_Defining_Identifier (Loc, | |
6663 | Name_DT_Prims); | |
6664 | DT_Prims_Acc : constant Entity_Id := | |
6665 | Make_Defining_Identifier (Loc, | |
6666 | Name_DT_Prims_Acc); | |
6667 | begin | |
6668 | Append_To (Result, | |
6669 | Make_Full_Type_Declaration (Loc, | |
6670 | Defining_Identifier => DT_Prims, | |
6671 | Type_Definition => | |
6672 | Make_Constrained_Array_Definition (Loc, | |
6673 | Discrete_Subtype_Definitions => New_List ( | |
6674 | Make_Range (Loc, | |
6675 | Low_Bound => Make_Integer_Literal (Loc, 1), | |
6676 | High_Bound => Make_Integer_Literal (Loc, | |
6677 | DT_Entry_Count | |
6678 | (First_Tag_Component (Typ))))), | |
6679 | Component_Definition => | |
6680 | Make_Component_Definition (Loc, | |
6681 | Subtype_Indication => | |
6682 | New_Reference_To (RTE (RE_Prim_Ptr), Loc))))); | |
17e14451 | 6683 | |
dffd0a90 | 6684 | Append_To (Result, |
6685 | Make_Full_Type_Declaration (Loc, | |
6686 | Defining_Identifier => DT_Prims_Acc, | |
6687 | Type_Definition => | |
6688 | Make_Access_To_Object_Definition (Loc, | |
6689 | Subtype_Indication => | |
6690 | New_Occurrence_Of (DT_Prims, Loc)))); | |
17e14451 | 6691 | |
dffd0a90 | 6692 | Append_Elmt (DT_Prims_Acc, Access_Disp_Table (Typ)); |
17e14451 | 6693 | |
dffd0a90 | 6694 | -- Analyze the resulting list and suppress the generation of the |
6695 | -- Init_Proc associated with the above array declaration because | |
6696 | -- this type is never used in object declarations. It is only used | |
6697 | -- to simplify the expansion associated with dispatching calls. | |
17e14451 | 6698 | |
dffd0a90 | 6699 | Analyze_List (Result); |
6700 | Set_Suppress_Init_Proc (Base_Type (DT_Prims)); | |
cc60bd16 | 6701 | |
ff6293ec | 6702 | -- Disable backend optimizations based on assumptions about the |
6703 | -- aliasing status of objects designated by the access to the | |
6704 | -- dispatch table. Required to handle dispatch tables imported | |
6705 | -- from C++. | |
6706 | ||
6707 | Set_No_Strict_Aliasing (Base_Type (DT_Prims_Acc)); | |
6708 | ||
d00681a7 | 6709 | -- Add the freezing nodes of these declarations; required to avoid |
6710 | -- generating these freezing nodes in wrong scopes (for example in | |
6711 | -- the IC routine of a derivation of Typ). | |
d03ada96 | 6712 | -- What is an "IC routine"? Is "init_proc" meant here??? |
d00681a7 | 6713 | |
d74fc39a | 6714 | Append_List_To (Result, Freeze_Entity (DT_Prims, Typ)); |
6715 | Append_List_To (Result, Freeze_Entity (DT_Prims_Acc, Typ)); | |
d00681a7 | 6716 | |
dffd0a90 | 6717 | -- Mark entity of dispatch table. Required by the back end to |
6718 | -- handle them properly. | |
cc60bd16 | 6719 | |
dffd0a90 | 6720 | Set_Is_Dispatch_Table_Entity (DT_Prims); |
6721 | end; | |
6722 | end if; | |
17e14451 | 6723 | |
11bd2f46 | 6724 | -- Mark entities of dispatch table. Required by the back end to handle |
6725 | -- them properly. | |
7640ed3d | 6726 | |
6727 | if Present (DT) then | |
6728 | Set_Is_Dispatch_Table_Entity (DT); | |
6729 | Set_Is_Dispatch_Table_Entity (Etype (DT)); | |
6730 | end if; | |
6731 | ||
d04be62f | 6732 | if Present (Iface_DT) then |
6733 | Set_Is_Dispatch_Table_Entity (Iface_DT); | |
6734 | Set_Is_Dispatch_Table_Entity (Etype (Iface_DT)); | |
6735 | end if; | |
6736 | ||
d00681a7 | 6737 | if Is_CPP_Class (Root_Type (Typ)) then |
6738 | Set_Ekind (DT_Ptr, E_Variable); | |
6739 | else | |
6740 | Set_Ekind (DT_Ptr, E_Constant); | |
6741 | end if; | |
6742 | ||
cdb1c38f | 6743 | Set_Is_Tag (DT_Ptr); |
6744 | Set_Related_Type (DT_Ptr, Typ); | |
6745 | ||
17e14451 | 6746 | return Result; |
6747 | end Make_Tags; | |
6748 | ||
cd534f03 | 6749 | --------------- |
6750 | -- New_Value -- | |
6751 | --------------- | |
6752 | ||
6753 | function New_Value (From : Node_Id) return Node_Id is | |
6754 | Res : constant Node_Id := Duplicate_Subexpr (From); | |
6755 | begin | |
6756 | if Is_Access_Type (Etype (From)) then | |
9af28f61 | 6757 | return |
6758 | Make_Explicit_Dereference (Sloc (From), | |
6759 | Prefix => Res); | |
cd534f03 | 6760 | else |
6761 | return Res; | |
6762 | end if; | |
6763 | end New_Value; | |
6764 | ||
ee6ba406 | 6765 | ----------------------------------- |
6766 | -- Original_View_In_Visible_Part -- | |
6767 | ----------------------------------- | |
6768 | ||
6769 | function Original_View_In_Visible_Part (Typ : Entity_Id) return Boolean is | |
6770 | Scop : constant Entity_Id := Scope (Typ); | |
6771 | ||
6772 | begin | |
6773 | -- The scope must be a package | |
6774 | ||
65149aa0 | 6775 | if not Is_Package_Or_Generic_Package (Scop) then |
ee6ba406 | 6776 | return False; |
6777 | end if; | |
6778 | ||
6779 | -- A type with a private declaration has a private view declared in | |
6780 | -- the visible part. | |
6781 | ||
6782 | if Has_Private_Declaration (Typ) then | |
6783 | return True; | |
6784 | end if; | |
6785 | ||
6786 | return List_Containing (Parent (Typ)) = | |
6787 | Visible_Declarations (Specification (Unit_Declaration_Node (Scop))); | |
6788 | end Original_View_In_Visible_Part; | |
6789 | ||
d62940bf | 6790 | ------------------ |
6791 | -- Prim_Op_Kind -- | |
6792 | ------------------ | |
6793 | ||
6794 | function Prim_Op_Kind | |
6795 | (Prim : Entity_Id; | |
6796 | Typ : Entity_Id) return Node_Id | |
6797 | is | |
6798 | Full_Typ : Entity_Id := Typ; | |
6799 | Loc : constant Source_Ptr := Sloc (Prim); | |
68f95949 | 6800 | Prim_Op : Entity_Id; |
d62940bf | 6801 | |
6802 | begin | |
6803 | -- Retrieve the original primitive operation | |
6804 | ||
fc2907f6 | 6805 | Prim_Op := Ultimate_Alias (Prim); |
d62940bf | 6806 | |
6807 | if Ekind (Typ) = E_Record_Type | |
6808 | and then Present (Corresponding_Concurrent_Type (Typ)) | |
6809 | then | |
6810 | Full_Typ := Corresponding_Concurrent_Type (Typ); | |
6811 | end if; | |
6812 | ||
d77e048b | 6813 | -- When a private tagged type is completed by a concurrent type, |
6814 | -- retrieve the full view. | |
6815 | ||
6816 | if Is_Private_Type (Full_Typ) then | |
6817 | Full_Typ := Full_View (Full_Typ); | |
6818 | end if; | |
6819 | ||
d62940bf | 6820 | if Ekind (Prim_Op) = E_Function then |
6821 | ||
6822 | -- Protected function | |
6823 | ||
6824 | if Ekind (Full_Typ) = E_Protected_Type then | |
6825 | return New_Reference_To (RTE (RE_POK_Protected_Function), Loc); | |
6826 | ||
76a1c25b | 6827 | -- Task function |
6828 | ||
6829 | elsif Ekind (Full_Typ) = E_Task_Type then | |
6830 | return New_Reference_To (RTE (RE_POK_Task_Function), Loc); | |
6831 | ||
d62940bf | 6832 | -- Regular function |
6833 | ||
6834 | else | |
6835 | return New_Reference_To (RTE (RE_POK_Function), Loc); | |
6836 | end if; | |
6837 | ||
6838 | else | |
6839 | pragma Assert (Ekind (Prim_Op) = E_Procedure); | |
6840 | ||
6841 | if Ekind (Full_Typ) = E_Protected_Type then | |
6842 | ||
6843 | -- Protected entry | |
6844 | ||
6845 | if Is_Primitive_Wrapper (Prim_Op) | |
6846 | and then Ekind (Wrapped_Entity (Prim_Op)) = E_Entry | |
6847 | then | |
6848 | return New_Reference_To (RTE (RE_POK_Protected_Entry), Loc); | |
6849 | ||
6850 | -- Protected procedure | |
6851 | ||
6852 | else | |
6853 | return New_Reference_To (RTE (RE_POK_Protected_Procedure), Loc); | |
6854 | end if; | |
6855 | ||
6856 | elsif Ekind (Full_Typ) = E_Task_Type then | |
6857 | ||
6858 | -- Task entry | |
6859 | ||
6860 | if Is_Primitive_Wrapper (Prim_Op) | |
6861 | and then Ekind (Wrapped_Entity (Prim_Op)) = E_Entry | |
6862 | then | |
6863 | return New_Reference_To (RTE (RE_POK_Task_Entry), Loc); | |
6864 | ||
6865 | -- Task "procedure". These are the internally Expander-generated | |
6866 | -- procedures (task body for instance). | |
6867 | ||
6868 | else | |
6869 | return New_Reference_To (RTE (RE_POK_Task_Procedure), Loc); | |
6870 | end if; | |
6871 | ||
6872 | -- Regular procedure | |
6873 | ||
6874 | else | |
6875 | return New_Reference_To (RTE (RE_POK_Procedure), Loc); | |
6876 | end if; | |
6877 | end if; | |
6878 | end Prim_Op_Kind; | |
6879 | ||
725a69d2 | 6880 | ------------------------ |
6881 | -- Register_Primitive -- | |
6882 | ------------------------ | |
6883 | ||
49260fa5 | 6884 | function Register_Primitive |
725a69d2 | 6885 | (Loc : Source_Ptr; |
49260fa5 | 6886 | Prim : Entity_Id) return List_Id |
725a69d2 | 6887 | is |
cdb1c38f | 6888 | DT_Ptr : Entity_Id; |
6889 | Iface_Prim : Entity_Id; | |
6890 | Iface_Typ : Entity_Id; | |
6891 | Iface_DT_Ptr : Entity_Id; | |
6892 | Iface_DT_Elmt : Elmt_Id; | |
49260fa5 | 6893 | L : constant List_Id := New_List; |
cdb1c38f | 6894 | Pos : Uint; |
6895 | Tag : Entity_Id; | |
cc60bd16 | 6896 | Tag_Typ : Entity_Id; |
cdb1c38f | 6897 | Thunk_Id : Entity_Id; |
6898 | Thunk_Code : Node_Id; | |
725a69d2 | 6899 | |
6900 | begin | |
6901 | pragma Assert (not Restriction_Active (No_Dispatching_Calls)); | |
6902 | ||
3f8cf2d2 | 6903 | -- Do not register in the dispatch table eliminated primitives |
6904 | ||
6905 | if not RTE_Available (RE_Tag) | |
6906 | or else Is_Eliminated (Ultimate_Alias (Prim)) | |
6907 | then | |
49260fa5 | 6908 | return L; |
725a69d2 | 6909 | end if; |
6910 | ||
a652dd51 | 6911 | if not Present (Interface_Alias (Prim)) then |
cc60bd16 | 6912 | Tag_Typ := Scope (DTC_Entity (Prim)); |
acf97c11 | 6913 | Pos := DT_Position (Prim); |
cc60bd16 | 6914 | Tag := First_Tag_Component (Tag_Typ); |
725a69d2 | 6915 | |
6916 | if Is_Predefined_Dispatching_Operation (Prim) | |
6917 | or else Is_Predefined_Dispatching_Alias (Prim) | |
6918 | then | |
cc60bd16 | 6919 | DT_Ptr := |
6920 | Node (Next_Elmt (First_Elmt (Access_Disp_Table (Tag_Typ)))); | |
6921 | ||
49260fa5 | 6922 | Append_To (L, |
725a69d2 | 6923 | Build_Set_Predefined_Prim_Op_Address (Loc, |
6924 | Tag_Node => New_Reference_To (DT_Ptr, Loc), | |
6925 | Position => Pos, | |
acf97c11 | 6926 | Address_Node => |
cc60bd16 | 6927 | Unchecked_Convert_To (RTE (RE_Prim_Ptr), |
acf97c11 | 6928 | Make_Attribute_Reference (Loc, |
6929 | Prefix => New_Reference_To (Prim, Loc), | |
6930 | Attribute_Name => Name_Unrestricted_Access)))); | |
725a69d2 | 6931 | |
9e7de1e1 | 6932 | -- Register copy of the pointer to the 'size primitive in the TSD |
cc60bd16 | 6933 | |
6934 | if Chars (Prim) = Name_uSize | |
6935 | and then RTE_Record_Component_Available (RE_Size_Func) | |
6936 | then | |
6937 | DT_Ptr := Node (First_Elmt (Access_Disp_Table (Tag_Typ))); | |
49260fa5 | 6938 | Append_To (L, |
cc60bd16 | 6939 | Build_Set_Size_Function (Loc, |
6940 | Tag_Node => New_Reference_To (DT_Ptr, Loc), | |
6941 | Size_Func => Prim)); | |
6942 | end if; | |
6943 | ||
725a69d2 | 6944 | else |
6945 | pragma Assert (Pos /= Uint_0 and then Pos <= DT_Entry_Count (Tag)); | |
6946 | ||
d00681a7 | 6947 | -- Skip registration of primitives located in the C++ part of the |
6948 | -- dispatch table. Their slot is set by the IC routine. | |
6949 | ||
6950 | if not Is_CPP_Class (Root_Type (Tag_Typ)) | |
6951 | or else Pos > CPP_Num_Prims (Tag_Typ) | |
6952 | then | |
6953 | DT_Ptr := Node (First_Elmt (Access_Disp_Table (Tag_Typ))); | |
6954 | Append_To (L, | |
6955 | Build_Set_Prim_Op_Address (Loc, | |
6956 | Typ => Tag_Typ, | |
6957 | Tag_Node => New_Reference_To (DT_Ptr, Loc), | |
6958 | Position => Pos, | |
6959 | Address_Node => | |
6960 | Unchecked_Convert_To (RTE (RE_Prim_Ptr), | |
6961 | Make_Attribute_Reference (Loc, | |
6962 | Prefix => New_Reference_To (Prim, Loc), | |
6963 | Attribute_Name => Name_Unrestricted_Access)))); | |
6964 | end if; | |
725a69d2 | 6965 | end if; |
6966 | ||
6967 | -- Ada 2005 (AI-251): Primitive associated with an interface type | |
6968 | -- Generate the code of the thunk only if the interface type is not an | |
6969 | -- immediate ancestor of Typ; otherwise the dispatch table associated | |
6970 | -- with the interface is the primary dispatch table and we have nothing | |
6971 | -- else to do here. | |
6972 | ||
6973 | else | |
cc60bd16 | 6974 | Tag_Typ := Find_Dispatching_Type (Alias (Prim)); |
a652dd51 | 6975 | Iface_Typ := Find_Dispatching_Type (Interface_Alias (Prim)); |
725a69d2 | 6976 | |
6977 | pragma Assert (Is_Interface (Iface_Typ)); | |
6978 | ||
c8da6114 | 6979 | -- No action needed for interfaces that are ancestors of Typ because |
6980 | -- their primitives are located in the primary dispatch table. | |
6981 | ||
6982 | if Is_Ancestor (Iface_Typ, Tag_Typ) then | |
6983 | return L; | |
d00681a7 | 6984 | |
6985 | -- No action needed for primitives located in the C++ part of the | |
6986 | -- dispatch table. Their slot is set by the IC routine. | |
6987 | ||
6988 | elsif Is_CPP_Class (Root_Type (Tag_Typ)) | |
6989 | and then DT_Position (Alias (Prim)) <= CPP_Num_Prims (Tag_Typ) | |
6990 | and then not Is_Predefined_Dispatching_Operation (Prim) | |
6991 | and then not Is_Predefined_Dispatching_Alias (Prim) | |
6992 | then | |
6993 | return L; | |
c8da6114 | 6994 | end if; |
6995 | ||
17e14451 | 6996 | Expand_Interface_Thunk (Prim, Thunk_Id, Thunk_Code); |
725a69d2 | 6997 | |
a652dd51 | 6998 | if not Is_Ancestor (Iface_Typ, Tag_Typ) |
725a69d2 | 6999 | and then Present (Thunk_Code) |
7000 | then | |
725a69d2 | 7001 | -- Generate the code necessary to fill the appropriate entry of |
7002 | -- the secondary dispatch table of Prim's controlling type with | |
7003 | -- Thunk_Id's address. | |
7004 | ||
cc60bd16 | 7005 | Iface_DT_Elmt := Find_Interface_ADT (Tag_Typ, Iface_Typ); |
cdb1c38f | 7006 | Iface_DT_Ptr := Node (Iface_DT_Elmt); |
7007 | pragma Assert (Has_Thunks (Iface_DT_Ptr)); | |
7008 | ||
a652dd51 | 7009 | Iface_Prim := Interface_Alias (Prim); |
acf97c11 | 7010 | Pos := DT_Position (Iface_Prim); |
7011 | Tag := First_Tag_Component (Iface_Typ); | |
49260fa5 | 7012 | |
7013 | Prepend_To (L, Thunk_Code); | |
725a69d2 | 7014 | |
7015 | if Is_Predefined_Dispatching_Operation (Prim) | |
7016 | or else Is_Predefined_Dispatching_Alias (Prim) | |
7017 | then | |
cdb1c38f | 7018 | Append_To (L, |
725a69d2 | 7019 | Build_Set_Predefined_Prim_Op_Address (Loc, |
acf97c11 | 7020 | Tag_Node => |
7021 | New_Reference_To (Node (Next_Elmt (Iface_DT_Elmt)), Loc), | |
725a69d2 | 7022 | Position => Pos, |
7023 | Address_Node => | |
cc60bd16 | 7024 | Unchecked_Convert_To (RTE (RE_Prim_Ptr), |
acf97c11 | 7025 | Make_Attribute_Reference (Loc, |
7026 | Prefix => New_Reference_To (Thunk_Id, Loc), | |
7027 | Attribute_Name => Name_Unrestricted_Access)))); | |
cdb1c38f | 7028 | |
acf97c11 | 7029 | Next_Elmt (Iface_DT_Elmt); |
cdb1c38f | 7030 | Next_Elmt (Iface_DT_Elmt); |
7031 | Iface_DT_Ptr := Node (Iface_DT_Elmt); | |
7032 | pragma Assert (not Has_Thunks (Iface_DT_Ptr)); | |
7033 | ||
7034 | Append_To (L, | |
7035 | Build_Set_Predefined_Prim_Op_Address (Loc, | |
acf97c11 | 7036 | Tag_Node => |
7037 | New_Reference_To (Node (Next_Elmt (Iface_DT_Elmt)), Loc), | |
cdb1c38f | 7038 | Position => Pos, |
7039 | Address_Node => | |
cc60bd16 | 7040 | Unchecked_Convert_To (RTE (RE_Prim_Ptr), |
acf97c11 | 7041 | Make_Attribute_Reference (Loc, |
7042 | Prefix => New_Reference_To (Alias (Prim), Loc), | |
7043 | Attribute_Name => Name_Unrestricted_Access)))); | |
cdb1c38f | 7044 | |
725a69d2 | 7045 | else |
7046 | pragma Assert (Pos /= Uint_0 | |
7047 | and then Pos <= DT_Entry_Count (Tag)); | |
7048 | ||
cdb1c38f | 7049 | Append_To (L, |
7050 | Build_Set_Prim_Op_Address (Loc, | |
7051 | Typ => Iface_Typ, | |
7052 | Tag_Node => New_Reference_To (Iface_DT_Ptr, Loc), | |
7053 | Position => Pos, | |
acf97c11 | 7054 | Address_Node => |
cc60bd16 | 7055 | Unchecked_Convert_To (RTE (RE_Prim_Ptr), |
acf97c11 | 7056 | Make_Attribute_Reference (Loc, |
7057 | Prefix => New_Reference_To (Thunk_Id, Loc), | |
7058 | Attribute_Name => Name_Unrestricted_Access)))); | |
cdb1c38f | 7059 | |
acf97c11 | 7060 | Next_Elmt (Iface_DT_Elmt); |
cdb1c38f | 7061 | Next_Elmt (Iface_DT_Elmt); |
7062 | Iface_DT_Ptr := Node (Iface_DT_Elmt); | |
7063 | pragma Assert (not Has_Thunks (Iface_DT_Ptr)); | |
7064 | ||
7065 | Append_To (L, | |
725a69d2 | 7066 | Build_Set_Prim_Op_Address (Loc, |
7067 | Typ => Iface_Typ, | |
7068 | Tag_Node => New_Reference_To (Iface_DT_Ptr, Loc), | |
7069 | Position => Pos, | |
acf97c11 | 7070 | Address_Node => |
cc60bd16 | 7071 | Unchecked_Convert_To (RTE (RE_Prim_Ptr), |
acf97c11 | 7072 | Make_Attribute_Reference (Loc, |
7073 | Prefix => New_Reference_To (Alias (Prim), Loc), | |
7074 | Attribute_Name => Name_Unrestricted_Access)))); | |
cdb1c38f | 7075 | |
725a69d2 | 7076 | end if; |
7077 | end if; | |
7078 | end if; | |
49260fa5 | 7079 | |
7080 | return L; | |
725a69d2 | 7081 | end Register_Primitive; |
7082 | ||
ee6ba406 | 7083 | ------------------------- |
7084 | -- Set_All_DT_Position -- | |
7085 | ------------------------- | |
7086 | ||
7087 | procedure Set_All_DT_Position (Typ : Entity_Id) is | |
ee6ba406 | 7088 | |
aad6babd | 7089 | procedure Validate_Position (Prim : Entity_Id); |
36b938a3 | 7090 | -- Check that the position assigned to Prim is completely safe |
aad6babd | 7091 | -- (it has not been assigned to a previously defined primitive |
7092 | -- operation of Typ) | |
7093 | ||
7094 | ----------------------- | |
7095 | -- Validate_Position -- | |
7096 | ----------------------- | |
7097 | ||
7098 | procedure Validate_Position (Prim : Entity_Id) is | |
af647dc7 | 7099 | Op_Elmt : Elmt_Id; |
7100 | Op : Entity_Id; | |
d62940bf | 7101 | |
aad6babd | 7102 | begin |
af647dc7 | 7103 | -- Aliased primitives are safe |
7104 | ||
7105 | if Present (Alias (Prim)) then | |
7106 | return; | |
7107 | end if; | |
7108 | ||
7109 | Op_Elmt := First_Elmt (Primitive_Operations (Typ)); | |
7110 | while Present (Op_Elmt) loop | |
7111 | Op := Node (Op_Elmt); | |
7112 | ||
7113 | -- No need to check against itself | |
7114 | ||
7115 | if Op = Prim then | |
7116 | null; | |
7117 | ||
aad6babd | 7118 | -- Primitive operations covering abstract interfaces are |
7119 | -- allocated later | |
7120 | ||
a652dd51 | 7121 | elsif Present (Interface_Alias (Op)) then |
aad6babd | 7122 | null; |
7123 | ||
68f95949 | 7124 | -- Predefined dispatching operations are completely safe. They |
7125 | -- are allocated at fixed positions in a separate table. | |
aad6babd | 7126 | |
af647dc7 | 7127 | elsif Is_Predefined_Dispatching_Operation (Op) |
7128 | or else Is_Predefined_Dispatching_Alias (Op) | |
7129 | then | |
aad6babd | 7130 | null; |
ee6ba406 | 7131 | |
aad6babd | 7132 | -- Aliased subprograms are safe |
7133 | ||
af647dc7 | 7134 | elsif Present (Alias (Op)) then |
aad6babd | 7135 | null; |
7136 | ||
af647dc7 | 7137 | elsif DT_Position (Op) = DT_Position (Prim) |
7138 | and then not Is_Predefined_Dispatching_Operation (Op) | |
7139 | and then not Is_Predefined_Dispatching_Operation (Prim) | |
7140 | and then not Is_Predefined_Dispatching_Alias (Op) | |
7141 | and then not Is_Predefined_Dispatching_Alias (Prim) | |
7142 | then | |
d62940bf | 7143 | |
7144 | -- Handle aliased subprograms | |
7145 | ||
7146 | declare | |
7147 | Op_1 : Entity_Id; | |
7148 | Op_2 : Entity_Id; | |
7149 | ||
7150 | begin | |
af647dc7 | 7151 | Op_1 := Op; |
d62940bf | 7152 | loop |
7153 | if Present (Overridden_Operation (Op_1)) then | |
7154 | Op_1 := Overridden_Operation (Op_1); | |
7155 | elsif Present (Alias (Op_1)) then | |
7156 | Op_1 := Alias (Op_1); | |
7157 | else | |
7158 | exit; | |
7159 | end if; | |
7160 | end loop; | |
7161 | ||
7162 | Op_2 := Prim; | |
7163 | loop | |
7164 | if Present (Overridden_Operation (Op_2)) then | |
7165 | Op_2 := Overridden_Operation (Op_2); | |
7166 | elsif Present (Alias (Op_2)) then | |
7167 | Op_2 := Alias (Op_2); | |
7168 | else | |
7169 | exit; | |
7170 | end if; | |
7171 | end loop; | |
7172 | ||
7173 | if Op_1 /= Op_2 then | |
7174 | raise Program_Error; | |
7175 | end if; | |
7176 | end; | |
aad6babd | 7177 | end if; |
7178 | ||
af647dc7 | 7179 | Next_Elmt (Op_Elmt); |
aad6babd | 7180 | end loop; |
7181 | end Validate_Position; | |
7182 | ||
af647dc7 | 7183 | -- Local variables |
7184 | ||
7185 | Parent_Typ : constant Entity_Id := Etype (Typ); | |
af647dc7 | 7186 | First_Prim : constant Elmt_Id := First_Elmt (Primitive_Operations (Typ)); |
7187 | The_Tag : constant Entity_Id := First_Tag_Component (Typ); | |
7188 | ||
7189 | Adjusted : Boolean := False; | |
7190 | Finalized : Boolean := False; | |
7191 | ||
343d35dc | 7192 | Count_Prim : Nat; |
7193 | DT_Length : Nat; | |
7194 | Nb_Prim : Nat; | |
af647dc7 | 7195 | Prim : Entity_Id; |
7196 | Prim_Elmt : Elmt_Id; | |
7197 | ||
aad6babd | 7198 | -- Start of processing for Set_All_DT_Position |
7199 | ||
7200 | begin | |
a652dd51 | 7201 | pragma Assert (Present (First_Tag_Component (Typ))); |
7202 | ||
b3dd22b3 | 7203 | -- Set the DT_Position for each primitive operation. Perform some sanity |
7204 | -- checks to avoid building inconsistent dispatch tables. | |
ee6ba406 | 7205 | |
b3dd22b3 | 7206 | -- First stage: Set the DTC entity of all the primitive operations. This |
7207 | -- is required to properly read the DT_Position attribute in the latter | |
7208 | -- stages. | |
ee6ba406 | 7209 | |
343d35dc | 7210 | Prim_Elmt := First_Prim; |
7211 | Count_Prim := 0; | |
7212 | while Present (Prim_Elmt) loop | |
7213 | Prim := Node (Prim_Elmt); | |
ee6ba406 | 7214 | |
343d35dc | 7215 | -- Predefined primitives have a separate dispatch table |
ee6ba406 | 7216 | |
343d35dc | 7217 | if not (Is_Predefined_Dispatching_Operation (Prim) |
b3dd22b3 | 7218 | or else |
7219 | Is_Predefined_Dispatching_Alias (Prim)) | |
343d35dc | 7220 | then |
7221 | Count_Prim := Count_Prim + 1; | |
7222 | end if; | |
ee6ba406 | 7223 | |
725a69d2 | 7224 | Set_DTC_Entity_Value (Typ, Prim); |
ee6ba406 | 7225 | |
343d35dc | 7226 | -- Clear any previous value of the DT_Position attribute. In this |
7227 | -- way we ensure that the final position of all the primitives is | |
36b938a3 | 7228 | -- established by the following stages of this algorithm. |
ee6ba406 | 7229 | |
343d35dc | 7230 | Set_DT_Position (Prim, No_Uint); |
ee6ba406 | 7231 | |
343d35dc | 7232 | Next_Elmt (Prim_Elmt); |
7233 | end loop; | |
ee6ba406 | 7234 | |
343d35dc | 7235 | declare |
acf97c11 | 7236 | Fixed_Prim : array (Int range 0 .. Count_Prim) of Boolean := |
7237 | (others => False); | |
7238 | ||
343d35dc | 7239 | E : Entity_Id; |
ee6ba406 | 7240 | |
725a69d2 | 7241 | procedure Handle_Inherited_Private_Subprograms (Typ : Entity_Id); |
7242 | -- Called if Typ is declared in a nested package or a public child | |
7243 | -- package to handle inherited primitives that were inherited by Typ | |
7244 | -- in the visible part, but whose declaration was deferred because | |
7245 | -- the parent operation was private and not visible at that point. | |
7246 | ||
343d35dc | 7247 | procedure Set_Fixed_Prim (Pos : Nat); |
7248 | -- Sets to true an element of the Fixed_Prim table to indicate | |
7249 | -- that this entry of the dispatch table of Typ is occupied. | |
ee6ba406 | 7250 | |
725a69d2 | 7251 | ------------------------------------------ |
7252 | -- Handle_Inherited_Private_Subprograms -- | |
7253 | ------------------------------------------ | |
7254 | ||
7255 | procedure Handle_Inherited_Private_Subprograms (Typ : Entity_Id) is | |
7256 | Op_List : Elist_Id; | |
7257 | Op_Elmt : Elmt_Id; | |
7258 | Op_Elmt_2 : Elmt_Id; | |
7259 | Prim_Op : Entity_Id; | |
7260 | Parent_Subp : Entity_Id; | |
7261 | ||
7262 | begin | |
7263 | Op_List := Primitive_Operations (Typ); | |
7264 | ||
7265 | Op_Elmt := First_Elmt (Op_List); | |
7266 | while Present (Op_Elmt) loop | |
7267 | Prim_Op := Node (Op_Elmt); | |
7268 | ||
7269 | -- Search primitives that are implicit operations with an | |
7270 | -- internal name whose parent operation has a normal name. | |
7271 | ||
7272 | if Present (Alias (Prim_Op)) | |
7273 | and then Find_Dispatching_Type (Alias (Prim_Op)) /= Typ | |
7274 | and then not Comes_From_Source (Prim_Op) | |
7275 | and then Is_Internal_Name (Chars (Prim_Op)) | |
7276 | and then not Is_Internal_Name (Chars (Alias (Prim_Op))) | |
7277 | then | |
7278 | Parent_Subp := Alias (Prim_Op); | |
7279 | ||
7280 | -- Check if the type has an explicit overriding for this | |
7281 | -- primitive. | |
7282 | ||
7283 | Op_Elmt_2 := Next_Elmt (Op_Elmt); | |
7284 | while Present (Op_Elmt_2) loop | |
7285 | if Chars (Node (Op_Elmt_2)) = Chars (Parent_Subp) | |
7286 | and then Type_Conformant (Prim_Op, Node (Op_Elmt_2)) | |
7287 | then | |
7288 | Set_DT_Position (Prim_Op, DT_Position (Parent_Subp)); | |
7289 | Set_DT_Position (Node (Op_Elmt_2), | |
7290 | DT_Position (Parent_Subp)); | |
7291 | Set_Fixed_Prim (UI_To_Int (DT_Position (Prim_Op))); | |
7292 | ||
7293 | goto Next_Primitive; | |
7294 | end if; | |
7295 | ||
7296 | Next_Elmt (Op_Elmt_2); | |
7297 | end loop; | |
7298 | end if; | |
7299 | ||
7300 | <<Next_Primitive>> | |
7301 | Next_Elmt (Op_Elmt); | |
7302 | end loop; | |
7303 | end Handle_Inherited_Private_Subprograms; | |
7304 | ||
343d35dc | 7305 | -------------------- |
7306 | -- Set_Fixed_Prim -- | |
7307 | -------------------- | |
ee6ba406 | 7308 | |
343d35dc | 7309 | procedure Set_Fixed_Prim (Pos : Nat) is |
ee6ba406 | 7310 | begin |
9e7de1e1 | 7311 | pragma Assert (Pos <= Count_Prim); |
343d35dc | 7312 | Fixed_Prim (Pos) := True; |
7313 | exception | |
7314 | when Constraint_Error => | |
7315 | raise Program_Error; | |
7316 | end Set_Fixed_Prim; | |
ee6ba406 | 7317 | |
343d35dc | 7318 | begin |
725a69d2 | 7319 | -- In case of nested packages and public child package it may be |
7320 | -- necessary a special management on inherited subprograms so that | |
7321 | -- the dispatch table is properly filled. | |
7322 | ||
7323 | if Ekind (Scope (Scope (Typ))) = E_Package | |
7324 | and then Scope (Scope (Typ)) /= Standard_Standard | |
7325 | and then ((Is_Derived_Type (Typ) and then not Is_Private_Type (Typ)) | |
7326 | or else | |
7327 | (Nkind (Parent (Typ)) = N_Private_Extension_Declaration | |
7328 | and then Is_Generic_Type (Typ))) | |
7329 | and then In_Open_Scopes (Scope (Etype (Typ))) | |
5b990e08 | 7330 | and then Is_Base_Type (Typ) |
725a69d2 | 7331 | then |
7332 | Handle_Inherited_Private_Subprograms (Typ); | |
7333 | end if; | |
7334 | ||
343d35dc | 7335 | -- Second stage: Register fixed entries |
ee6ba406 | 7336 | |
343d35dc | 7337 | Nb_Prim := 0; |
7338 | Prim_Elmt := First_Prim; | |
7339 | while Present (Prim_Elmt) loop | |
7340 | Prim := Node (Prim_Elmt); | |
ee6ba406 | 7341 | |
343d35dc | 7342 | -- Predefined primitives have a separate table and all its |
7343 | -- entries are at predefined fixed positions. | |
ee6ba406 | 7344 | |
343d35dc | 7345 | if Is_Predefined_Dispatching_Operation (Prim) then |
7346 | Set_DT_Position (Prim, Default_Prim_Op_Position (Prim)); | |
ee6ba406 | 7347 | |
343d35dc | 7348 | elsif Is_Predefined_Dispatching_Alias (Prim) then |
fc2907f6 | 7349 | Set_DT_Position (Prim, |
7350 | Default_Prim_Op_Position (Ultimate_Alias (Prim))); | |
d62940bf | 7351 | |
343d35dc | 7352 | -- Overriding primitives of ancestor abstract interfaces |
ee6ba406 | 7353 | |
a652dd51 | 7354 | elsif Present (Interface_Alias (Prim)) |
7355 | and then Is_Ancestor | |
7356 | (Find_Dispatching_Type (Interface_Alias (Prim)), Typ) | |
343d35dc | 7357 | then |
7358 | pragma Assert (DT_Position (Prim) = No_Uint | |
a652dd51 | 7359 | and then Present (DTC_Entity (Interface_Alias (Prim)))); |
ee6ba406 | 7360 | |
a652dd51 | 7361 | E := Interface_Alias (Prim); |
343d35dc | 7362 | Set_DT_Position (Prim, DT_Position (E)); |
aad6babd | 7363 | |
343d35dc | 7364 | pragma Assert |
7365 | (DT_Position (Alias (Prim)) = No_Uint | |
7366 | or else DT_Position (Alias (Prim)) = DT_Position (E)); | |
7367 | Set_DT_Position (Alias (Prim), DT_Position (E)); | |
7368 | Set_Fixed_Prim (UI_To_Int (DT_Position (Prim))); | |
af647dc7 | 7369 | |
343d35dc | 7370 | -- Overriding primitives must use the same entry as the |
36b938a3 | 7371 | -- overridden primitive. |
af647dc7 | 7372 | |
a652dd51 | 7373 | elsif not Present (Interface_Alias (Prim)) |
343d35dc | 7374 | and then Present (Alias (Prim)) |
17e14451 | 7375 | and then Chars (Prim) = Chars (Alias (Prim)) |
343d35dc | 7376 | and then Find_Dispatching_Type (Alias (Prim)) /= Typ |
a652dd51 | 7377 | and then Is_Ancestor |
343d35dc | 7378 | (Find_Dispatching_Type (Alias (Prim)), Typ) |
7379 | and then Present (DTC_Entity (Alias (Prim))) | |
af647dc7 | 7380 | then |
343d35dc | 7381 | E := Alias (Prim); |
7382 | Set_DT_Position (Prim, DT_Position (E)); | |
aad6babd | 7383 | |
343d35dc | 7384 | if not Is_Predefined_Dispatching_Alias (E) then |
7385 | Set_Fixed_Prim (UI_To_Int (DT_Position (E))); | |
7386 | end if; | |
9dfe12ae | 7387 | end if; |
ee6ba406 | 7388 | |
aad6babd | 7389 | Next_Elmt (Prim_Elmt); |
7390 | end loop; | |
7391 | ||
b381b314 | 7392 | -- Third stage: Fix the position of all the new primitives. |
343d35dc | 7393 | -- Entries associated with primitives covering interfaces |
7394 | -- are handled in a latter round. | |
aad6babd | 7395 | |
343d35dc | 7396 | Prim_Elmt := First_Prim; |
7397 | while Present (Prim_Elmt) loop | |
7398 | Prim := Node (Prim_Elmt); | |
aad6babd | 7399 | |
343d35dc | 7400 | -- Skip primitives previously set entries |
aad6babd | 7401 | |
343d35dc | 7402 | if DT_Position (Prim) /= No_Uint then |
7403 | null; | |
aad6babd | 7404 | |
343d35dc | 7405 | -- Primitives covering interface primitives are handled later |
aad6babd | 7406 | |
a652dd51 | 7407 | elsif Present (Interface_Alias (Prim)) then |
343d35dc | 7408 | null; |
aad6babd | 7409 | |
343d35dc | 7410 | else |
7411 | -- Take the next available position in the DT | |
aad6babd | 7412 | |
343d35dc | 7413 | loop |
7414 | Nb_Prim := Nb_Prim + 1; | |
7415 | pragma Assert (Nb_Prim <= Count_Prim); | |
7416 | exit when not Fixed_Prim (Nb_Prim); | |
7417 | end loop; | |
aad6babd | 7418 | |
343d35dc | 7419 | Set_DT_Position (Prim, UI_From_Int (Nb_Prim)); |
7420 | Set_Fixed_Prim (Nb_Prim); | |
7421 | end if; | |
aad6babd | 7422 | |
343d35dc | 7423 | Next_Elmt (Prim_Elmt); |
7424 | end loop; | |
7425 | end; | |
aad6babd | 7426 | |
343d35dc | 7427 | -- Fourth stage: Complete the decoration of primitives covering |
7428 | -- interfaces (that is, propagate the DT_Position attribute | |
7429 | -- from the aliased primitive) | |
aad6babd | 7430 | |
343d35dc | 7431 | Prim_Elmt := First_Prim; |
7432 | while Present (Prim_Elmt) loop | |
7433 | Prim := Node (Prim_Elmt); | |
aad6babd | 7434 | |
343d35dc | 7435 | if DT_Position (Prim) = No_Uint |
a652dd51 | 7436 | and then Present (Interface_Alias (Prim)) |
343d35dc | 7437 | then |
7438 | pragma Assert (Present (Alias (Prim)) | |
7439 | and then Find_Dispatching_Type (Alias (Prim)) = Typ); | |
aad6babd | 7440 | |
343d35dc | 7441 | -- Check if this entry will be placed in the primary DT |
aad6babd | 7442 | |
a652dd51 | 7443 | if Is_Ancestor |
7444 | (Find_Dispatching_Type (Interface_Alias (Prim)), Typ) | |
ee6ba406 | 7445 | then |
343d35dc | 7446 | pragma Assert (DT_Position (Alias (Prim)) /= No_Uint); |
7447 | Set_DT_Position (Prim, DT_Position (Alias (Prim))); | |
aad6babd | 7448 | |
343d35dc | 7449 | -- Otherwise it will be placed in the secondary DT |
aad6babd | 7450 | |
343d35dc | 7451 | else |
7452 | pragma Assert | |
a652dd51 | 7453 | (DT_Position (Interface_Alias (Prim)) /= No_Uint); |
343d35dc | 7454 | Set_DT_Position (Prim, |
a652dd51 | 7455 | DT_Position (Interface_Alias (Prim))); |
aad6babd | 7456 | end if; |
343d35dc | 7457 | end if; |
aad6babd | 7458 | |
343d35dc | 7459 | Next_Elmt (Prim_Elmt); |
7460 | end loop; | |
d62940bf | 7461 | |
343d35dc | 7462 | -- Generate listing showing the contents of the dispatch tables. |
7463 | -- This action is done before some further static checks because | |
7464 | -- in case of critical errors caused by a wrong dispatch table | |
7465 | -- we need to see the contents of such table. | |
d62940bf | 7466 | |
343d35dc | 7467 | if Debug_Flag_ZZ then |
7468 | Write_DT (Typ); | |
7469 | end if; | |
aad6babd | 7470 | |
343d35dc | 7471 | -- Final stage: Ensure that the table is correct plus some further |
7472 | -- verifications concerning the primitives. | |
aad6babd | 7473 | |
343d35dc | 7474 | Prim_Elmt := First_Prim; |
7475 | DT_Length := 0; | |
7476 | while Present (Prim_Elmt) loop | |
7477 | Prim := Node (Prim_Elmt); | |
aad6babd | 7478 | |
343d35dc | 7479 | -- At this point all the primitives MUST have a position |
acf97c11 | 7480 | -- in the dispatch table. |
aad6babd | 7481 | |
343d35dc | 7482 | if DT_Position (Prim) = No_Uint then |
7483 | raise Program_Error; | |
7484 | end if; | |
aad6babd | 7485 | |
343d35dc | 7486 | -- Calculate real size of the dispatch table |
aad6babd | 7487 | |
343d35dc | 7488 | if not (Is_Predefined_Dispatching_Operation (Prim) |
7489 | or else Is_Predefined_Dispatching_Alias (Prim)) | |
7490 | and then UI_To_Int (DT_Position (Prim)) > DT_Length | |
7491 | then | |
7492 | DT_Length := UI_To_Int (DT_Position (Prim)); | |
7493 | end if; | |
aad6babd | 7494 | |
36b938a3 | 7495 | -- Ensure that the assigned position to non-predefined |
343d35dc | 7496 | -- dispatching operations in the dispatch table is correct. |
aad6babd | 7497 | |
343d35dc | 7498 | if not (Is_Predefined_Dispatching_Operation (Prim) |
7499 | or else Is_Predefined_Dispatching_Alias (Prim)) | |
7500 | then | |
7501 | Validate_Position (Prim); | |
7502 | end if; | |
ee6ba406 | 7503 | |
343d35dc | 7504 | if Chars (Prim) = Name_Finalize then |
7505 | Finalized := True; | |
7506 | end if; | |
ee6ba406 | 7507 | |
343d35dc | 7508 | if Chars (Prim) = Name_Adjust then |
7509 | Adjusted := True; | |
7510 | end if; | |
af647dc7 | 7511 | |
503f7fd3 | 7512 | -- An abstract operation cannot be declared in the private part for a |
7513 | -- visible abstract type, because it can't be overridden outside this | |
7514 | -- package hierarchy. For explicit declarations this is checked at | |
7515 | -- the point of declaration, but for inherited operations it must be | |
7516 | -- done when building the dispatch table. | |
343d35dc | 7517 | |
a652dd51 | 7518 | -- Ada 2005 (AI-251): Primitives associated with interfaces are |
7519 | -- excluded from this check because interfaces must be visible in | |
7520 | -- the public and private part (RM 7.3 (7.3/2)) | |
343d35dc | 7521 | |
6fb3c314 | 7522 | -- We disable this check in CodePeer mode, to accommodate legacy |
6da4d289 | 7523 | -- Ada code. |
7524 | ||
7525 | if not CodePeer_Mode | |
7526 | and then Is_Abstract_Type (Typ) | |
343d35dc | 7527 | and then Is_Abstract_Subprogram (Prim) |
7528 | and then Present (Alias (Prim)) | |
a652dd51 | 7529 | and then not Is_Interface |
7530 | (Find_Dispatching_Type (Ultimate_Alias (Prim))) | |
7531 | and then not Present (Interface_Alias (Prim)) | |
343d35dc | 7532 | and then Is_Derived_Type (Typ) |
7533 | and then In_Private_Part (Current_Scope) | |
7534 | and then | |
7535 | List_Containing (Parent (Prim)) = | |
7536 | Private_Declarations | |
7537 | (Specification (Unit_Declaration_Node (Current_Scope))) | |
7538 | and then Original_View_In_Visible_Part (Typ) | |
7539 | then | |
7540 | -- We exclude Input and Output stream operations because | |
7541 | -- Limited_Controlled inherits useless Input and Output | |
7542 | -- stream operations from Root_Controlled, which can | |
7543 | -- never be overridden. | |
ee6ba406 | 7544 | |
343d35dc | 7545 | if not Is_TSS (Prim, TSS_Stream_Input) |
7546 | and then | |
7547 | not Is_TSS (Prim, TSS_Stream_Output) | |
ee6ba406 | 7548 | then |
503f7fd3 | 7549 | Error_Msg_NE |
343d35dc | 7550 | ("abstract inherited private operation&" & |
17e14451 | 7551 | " must be overridden (RM 3.9.3(10))", |
343d35dc | 7552 | Parent (Typ), Prim); |
ee6ba406 | 7553 | end if; |
343d35dc | 7554 | end if; |
aad6babd | 7555 | |
343d35dc | 7556 | Next_Elmt (Prim_Elmt); |
7557 | end loop; | |
ee6ba406 | 7558 | |
343d35dc | 7559 | -- Additional check |
aad6babd | 7560 | |
343d35dc | 7561 | if Is_Controlled (Typ) then |
7562 | if not Finalized then | |
503f7fd3 | 7563 | Error_Msg_N |
343d35dc | 7564 | ("controlled type has no explicit Finalize method?", Typ); |
ee6ba406 | 7565 | |
343d35dc | 7566 | elsif not Adjusted then |
503f7fd3 | 7567 | Error_Msg_N |
343d35dc | 7568 | ("controlled type has no explicit Adjust method?", Typ); |
ee6ba406 | 7569 | end if; |
343d35dc | 7570 | end if; |
ee6ba406 | 7571 | |
343d35dc | 7572 | -- Set the final size of the Dispatch Table |
aad6babd | 7573 | |
343d35dc | 7574 | Set_DT_Entry_Count (The_Tag, UI_From_Int (DT_Length)); |
ee6ba406 | 7575 | |
725a69d2 | 7576 | -- The derived type must have at least as many components as its parent |
acf97c11 | 7577 | -- (for root types Etype points to itself and the test cannot fail). |
aad6babd | 7578 | |
725a69d2 | 7579 | if DT_Entry_Count (The_Tag) < |
7580 | DT_Entry_Count (First_Tag_Component (Parent_Typ)) | |
7581 | then | |
7582 | raise Program_Error; | |
aad6babd | 7583 | end if; |
ee6ba406 | 7584 | end Set_All_DT_Position; |
7585 | ||
294b942d | 7586 | -------------------------- |
7587 | -- Set_CPP_Constructors -- | |
7588 | -------------------------- | |
ee6ba406 | 7589 | |
294b942d | 7590 | procedure Set_CPP_Constructors (Typ : Entity_Id) is |
d00681a7 | 7591 | |
7592 | procedure Set_CPP_Constructors_Old (Typ : Entity_Id); | |
7593 | -- For backward compatibility this routine handles CPP constructors | |
7594 | -- of non-tagged types. | |
7595 | ||
7596 | procedure Set_CPP_Constructors_Old (Typ : Entity_Id) is | |
7597 | Loc : Source_Ptr; | |
7598 | Init : Entity_Id; | |
7599 | E : Entity_Id; | |
7600 | Found : Boolean := False; | |
7601 | P : Node_Id; | |
7602 | Parms : List_Id; | |
7603 | ||
7604 | begin | |
7605 | -- Look for the constructor entities | |
7606 | ||
7607 | E := Next_Entity (Typ); | |
7608 | while Present (E) loop | |
7609 | if Ekind (E) = E_Function | |
7610 | and then Is_Constructor (E) | |
7611 | then | |
7612 | -- Create the init procedure | |
7613 | ||
7614 | Found := True; | |
7615 | Loc := Sloc (E); | |
7616 | Init := Make_Defining_Identifier (Loc, | |
7617 | Make_Init_Proc_Name (Typ)); | |
7618 | Parms := | |
7619 | New_List ( | |
7620 | Make_Parameter_Specification (Loc, | |
7621 | Defining_Identifier => | |
7622 | Make_Defining_Identifier (Loc, Name_X), | |
7623 | Parameter_Type => | |
7624 | New_Reference_To (Typ, Loc))); | |
7625 | ||
7626 | if Present (Parameter_Specifications (Parent (E))) then | |
7627 | P := First (Parameter_Specifications (Parent (E))); | |
7628 | while Present (P) loop | |
7629 | Append_To (Parms, | |
7630 | Make_Parameter_Specification (Loc, | |
7631 | Defining_Identifier => | |
7632 | Make_Defining_Identifier (Loc, | |
7633 | Chars (Defining_Identifier (P))), | |
7634 | Parameter_Type => | |
7635 | New_Copy_Tree (Parameter_Type (P)))); | |
7636 | Next (P); | |
7637 | end loop; | |
7638 | end if; | |
7639 | ||
7640 | Discard_Node ( | |
7641 | Make_Subprogram_Declaration (Loc, | |
7642 | Make_Procedure_Specification (Loc, | |
7643 | Defining_Unit_Name => Init, | |
7644 | Parameter_Specifications => Parms))); | |
7645 | ||
7646 | Set_Init_Proc (Typ, Init); | |
7647 | Set_Is_Imported (Init); | |
7648 | Set_Interface_Name (Init, Interface_Name (E)); | |
7649 | Set_Convention (Init, Convention_C); | |
7650 | Set_Is_Public (Init); | |
7651 | Set_Has_Completion (Init); | |
7652 | end if; | |
7653 | ||
7654 | Next_Entity (E); | |
7655 | end loop; | |
7656 | ||
7657 | -- If there are no constructors, mark the type as abstract since we | |
7658 | -- won't be able to declare objects of that type. | |
7659 | ||
7660 | if not Found then | |
7661 | Set_Is_Abstract_Type (Typ); | |
7662 | end if; | |
7663 | end Set_CPP_Constructors_Old; | |
7664 | ||
7665 | -- Local variables | |
7666 | ||
ee6ba406 | 7667 | Loc : Source_Ptr; |
ee6ba406 | 7668 | E : Entity_Id; |
294b942d | 7669 | Found : Boolean := False; |
7670 | P : Node_Id; | |
7671 | Parms : List_Id; | |
ee6ba406 | 7672 | |
d00681a7 | 7673 | Constructor_Decl_Node : Node_Id; |
7674 | Constructor_Id : Entity_Id; | |
7675 | Wrapper_Id : Entity_Id; | |
7676 | Wrapper_Body_Node : Node_Id; | |
7677 | Actuals : List_Id; | |
7678 | Body_Stmts : List_Id; | |
7679 | Init_Tags_List : List_Id; | |
7680 | ||
ee6ba406 | 7681 | begin |
d00681a7 | 7682 | pragma Assert (Is_CPP_Class (Typ)); |
7683 | ||
7684 | -- For backward compatibility the compiler accepts C++ classes | |
7685 | -- imported through non-tagged record types. In such case the | |
7686 | -- wrapper of the C++ constructor is useless because the _tag | |
7687 | -- component is not available. | |
7688 | ||
7689 | -- Example: | |
7690 | -- type Root is limited record ... | |
7691 | -- pragma Import (CPP, Root); | |
7692 | -- function New_Root return Root; | |
7693 | -- pragma CPP_Constructor (New_Root, ... ); | |
7694 | ||
7695 | if not Is_Tagged_Type (Typ) then | |
7696 | Set_CPP_Constructors_Old (Typ); | |
7697 | return; | |
7698 | end if; | |
7699 | ||
294b942d | 7700 | -- Look for the constructor entities |
ee6ba406 | 7701 | |
7702 | E := Next_Entity (Typ); | |
294b942d | 7703 | while Present (E) loop |
7704 | if Ekind (E) = E_Function | |
7705 | and then Is_Constructor (E) | |
7706 | then | |
294b942d | 7707 | Found := True; |
7708 | Loc := Sloc (E); | |
d00681a7 | 7709 | |
7710 | -- Generate the declaration of the imported C++ constructor | |
7711 | ||
294b942d | 7712 | Parms := |
7713 | New_List ( | |
7714 | Make_Parameter_Specification (Loc, | |
7715 | Defining_Identifier => | |
d00681a7 | 7716 | Make_Defining_Identifier (Loc, Name_uInit), |
294b942d | 7717 | Parameter_Type => |
7718 | New_Reference_To (Typ, Loc))); | |
7719 | ||
7720 | if Present (Parameter_Specifications (Parent (E))) then | |
7721 | P := First (Parameter_Specifications (Parent (E))); | |
7722 | while Present (P) loop | |
7723 | Append_To (Parms, | |
7724 | Make_Parameter_Specification (Loc, | |
7725 | Defining_Identifier => | |
7726 | Make_Defining_Identifier (Loc, | |
7727 | Chars (Defining_Identifier (P))), | |
7728 | Parameter_Type => New_Copy_Tree (Parameter_Type (P)))); | |
7729 | Next (P); | |
7730 | end loop; | |
7731 | end if; | |
7732 | ||
d00681a7 | 7733 | Constructor_Id := Make_Temporary (Loc, 'P'); |
7734 | ||
7735 | Constructor_Decl_Node := | |
294b942d | 7736 | Make_Subprogram_Declaration (Loc, |
7737 | Make_Procedure_Specification (Loc, | |
d00681a7 | 7738 | Defining_Unit_Name => Constructor_Id, |
7739 | Parameter_Specifications => Parms)); | |
7740 | ||
7741 | Set_Is_Imported (Constructor_Id); | |
7742 | Set_Interface_Name (Constructor_Id, Interface_Name (E)); | |
7743 | Set_Convention (Constructor_Id, Convention_C); | |
7744 | Set_Is_Public (Constructor_Id); | |
7745 | Set_Has_Completion (Constructor_Id); | |
7746 | ||
7747 | -- Build the wrapper of this constructor | |
7748 | ||
7749 | Parms := | |
7750 | New_List ( | |
7751 | Make_Parameter_Specification (Loc, | |
7752 | Defining_Identifier => | |
7753 | Make_Defining_Identifier (Loc, Name_uInit), | |
7754 | Parameter_Type => | |
7755 | New_Reference_To (Typ, Loc))); | |
7756 | ||
7757 | if Present (Parameter_Specifications (Parent (E))) then | |
7758 | P := First (Parameter_Specifications (Parent (E))); | |
7759 | while Present (P) loop | |
7760 | Append_To (Parms, | |
7761 | Make_Parameter_Specification (Loc, | |
7762 | Defining_Identifier => | |
7763 | Make_Defining_Identifier (Loc, | |
7764 | Chars (Defining_Identifier (P))), | |
7765 | Parameter_Type => New_Copy_Tree (Parameter_Type (P)))); | |
7766 | Next (P); | |
7767 | end loop; | |
7768 | end if; | |
7769 | ||
7770 | Body_Stmts := New_List; | |
7771 | ||
7772 | -- Invoke the C++ constructor | |
7773 | ||
7774 | Actuals := New_List; | |
7775 | ||
7776 | P := First (Parms); | |
7777 | while Present (P) loop | |
7778 | Append_To (Actuals, | |
7779 | New_Reference_To (Defining_Identifier (P), Loc)); | |
7780 | Next (P); | |
7781 | end loop; | |
7782 | ||
7783 | Append_To (Body_Stmts, | |
7784 | Make_Procedure_Call_Statement (Loc, | |
7785 | Name => New_Reference_To (Constructor_Id, Loc), | |
7786 | Parameter_Associations => Actuals)); | |
7787 | ||
7788 | -- Initialize copies of C++ primary and secondary tags | |
7789 | ||
7790 | Init_Tags_List := New_List; | |
7791 | ||
7792 | declare | |
7793 | Tag_Elmt : Elmt_Id; | |
7794 | Tag_Comp : Node_Id; | |
7795 | ||
7796 | begin | |
7797 | Tag_Elmt := First_Elmt (Access_Disp_Table (Typ)); | |
7798 | Tag_Comp := First_Tag_Component (Typ); | |
7799 | ||
7800 | while Present (Tag_Elmt) | |
7801 | and then Is_Tag (Node (Tag_Elmt)) | |
7802 | loop | |
7803 | -- Skip the following assertion with primary tags because | |
7804 | -- Related_Type is not set on primary tag components | |
7805 | ||
7806 | pragma Assert (Tag_Comp = First_Tag_Component (Typ) | |
7807 | or else Related_Type (Node (Tag_Elmt)) | |
7808 | = Related_Type (Tag_Comp)); | |
7809 | ||
7810 | Append_To (Init_Tags_List, | |
7811 | Make_Assignment_Statement (Loc, | |
7812 | Name => | |
7813 | New_Reference_To (Node (Tag_Elmt), Loc), | |
7814 | Expression => | |
7815 | Make_Selected_Component (Loc, | |
55868293 | 7816 | Prefix => |
7817 | Make_Identifier (Loc, Name_uInit), | |
d00681a7 | 7818 | Selector_Name => |
7819 | New_Reference_To (Tag_Comp, Loc)))); | |
7820 | ||
7821 | Tag_Comp := Next_Tag_Component (Tag_Comp); | |
7822 | Next_Elmt (Tag_Elmt); | |
7823 | end loop; | |
7824 | end; | |
7825 | ||
7826 | Append_To (Body_Stmts, | |
7827 | Make_If_Statement (Loc, | |
7828 | Condition => | |
7829 | Make_Op_Eq (Loc, | |
7830 | Left_Opnd => | |
7831 | New_Reference_To | |
7832 | (Node (First_Elmt (Access_Disp_Table (Typ))), | |
7833 | Loc), | |
7834 | Right_Opnd => | |
7835 | Unchecked_Convert_To (RTE (RE_Tag), | |
7836 | New_Reference_To (RTE (RE_Null_Address), Loc))), | |
7837 | Then_Statements => Init_Tags_List)); | |
7838 | ||
7839 | Wrapper_Id := Make_Defining_Identifier (Loc, | |
7840 | Make_Init_Proc_Name (Typ)); | |
7841 | ||
7842 | Wrapper_Body_Node := | |
7843 | Make_Subprogram_Body (Loc, | |
7844 | Specification => | |
7845 | Make_Procedure_Specification (Loc, | |
7846 | Defining_Unit_Name => Wrapper_Id, | |
7847 | Parameter_Specifications => Parms), | |
7848 | Declarations => New_List (Constructor_Decl_Node), | |
7849 | Handled_Statement_Sequence => | |
7850 | Make_Handled_Sequence_Of_Statements (Loc, | |
7851 | Statements => Body_Stmts, | |
7852 | Exception_Handlers => No_List)); | |
7853 | ||
7854 | Discard_Node (Wrapper_Body_Node); | |
7855 | Set_Init_Proc (Typ, Wrapper_Id); | |
294b942d | 7856 | end if; |
7857 | ||
ee6ba406 | 7858 | Next_Entity (E); |
7859 | end loop; | |
7860 | ||
9dfe12ae | 7861 | -- If there are no constructors, mark the type as abstract since we |
ee6ba406 | 7862 | -- won't be able to declare objects of that type. |
7863 | ||
294b942d | 7864 | if not Found then |
343d35dc | 7865 | Set_Is_Abstract_Type (Typ); |
ee6ba406 | 7866 | end if; |
d00681a7 | 7867 | |
7868 | -- If the CPP type has constructors then it must import also the default | |
7869 | -- C++ constructor. It is required for default initialization of objects | |
7870 | -- of the type. It is also required to elaborate objects of Ada types | |
7871 | -- that are defined as derivations of this CPP type. | |
7872 | ||
7873 | if Has_CPP_Constructors (Typ) | |
7874 | and then No (Init_Proc (Typ)) | |
7875 | then | |
7876 | Error_Msg_N ("?default constructor must be imported from C++", Typ); | |
7877 | end if; | |
294b942d | 7878 | end Set_CPP_Constructors; |
ee6ba406 | 7879 | |
725a69d2 | 7880 | -------------------------- |
7881 | -- Set_DTC_Entity_Value -- | |
7882 | -------------------------- | |
7883 | ||
7884 | procedure Set_DTC_Entity_Value | |
7885 | (Tagged_Type : Entity_Id; | |
7886 | Prim : Entity_Id) | |
7887 | is | |
7888 | begin | |
a652dd51 | 7889 | if Present (Interface_Alias (Prim)) |
725a69d2 | 7890 | and then Is_Interface |
a652dd51 | 7891 | (Find_Dispatching_Type (Interface_Alias (Prim))) |
725a69d2 | 7892 | then |
7893 | Set_DTC_Entity (Prim, | |
7894 | Find_Interface_Tag | |
7895 | (T => Tagged_Type, | |
a652dd51 | 7896 | Iface => Find_Dispatching_Type (Interface_Alias (Prim)))); |
725a69d2 | 7897 | else |
7898 | Set_DTC_Entity (Prim, | |
7899 | First_Tag_Component (Tagged_Type)); | |
7900 | end if; | |
7901 | end Set_DTC_Entity_Value; | |
7902 | ||
952af0b9 | 7903 | ----------------- |
7904 | -- Tagged_Kind -- | |
7905 | ----------------- | |
7906 | ||
7907 | function Tagged_Kind (T : Entity_Id) return Node_Id is | |
7908 | Conc_Typ : Entity_Id; | |
7909 | Loc : constant Source_Ptr := Sloc (T); | |
7910 | ||
7911 | begin | |
68f95949 | 7912 | pragma Assert |
7913 | (Is_Tagged_Type (T) and then RTE_Available (RE_Tagged_Kind)); | |
952af0b9 | 7914 | |
7915 | -- Abstract kinds | |
7916 | ||
343d35dc | 7917 | if Is_Abstract_Type (T) then |
952af0b9 | 7918 | if Is_Limited_Record (T) then |
7919 | return New_Reference_To (RTE (RE_TK_Abstract_Limited_Tagged), Loc); | |
7920 | else | |
7921 | return New_Reference_To (RTE (RE_TK_Abstract_Tagged), Loc); | |
7922 | end if; | |
7923 | ||
7924 | -- Concurrent kinds | |
7925 | ||
7926 | elsif Is_Concurrent_Record_Type (T) then | |
7927 | Conc_Typ := Corresponding_Concurrent_Type (T); | |
7928 | ||
17e14451 | 7929 | if Present (Full_View (Conc_Typ)) then |
7930 | Conc_Typ := Full_View (Conc_Typ); | |
7931 | end if; | |
7932 | ||
952af0b9 | 7933 | if Ekind (Conc_Typ) = E_Protected_Type then |
7934 | return New_Reference_To (RTE (RE_TK_Protected), Loc); | |
7935 | else | |
7936 | pragma Assert (Ekind (Conc_Typ) = E_Task_Type); | |
7937 | return New_Reference_To (RTE (RE_TK_Task), Loc); | |
7938 | end if; | |
7939 | ||
7940 | -- Regular tagged kinds | |
7941 | ||
7942 | else | |
7943 | if Is_Limited_Record (T) then | |
7944 | return New_Reference_To (RTE (RE_TK_Limited_Tagged), Loc); | |
7945 | else | |
7946 | return New_Reference_To (RTE (RE_TK_Tagged), Loc); | |
7947 | end if; | |
7948 | end if; | |
7949 | end Tagged_Kind; | |
7950 | ||
aad6babd | 7951 | -------------- |
7952 | -- Write_DT -- | |
7953 | -------------- | |
7954 | ||
7955 | procedure Write_DT (Typ : Entity_Id) is | |
7956 | Elmt : Elmt_Id; | |
7957 | Prim : Node_Id; | |
7958 | ||
7959 | begin | |
7960 | -- Protect this procedure against wrong usage. Required because it will | |
7961 | -- be used directly from GDB | |
7962 | ||
17e14451 | 7963 | if not (Typ <= Last_Node_Id) |
aad6babd | 7964 | or else not Is_Tagged_Type (Typ) |
7965 | then | |
d62940bf | 7966 | Write_Str ("wrong usage: Write_DT must be used with tagged types"); |
aad6babd | 7967 | Write_Eol; |
7968 | return; | |
7969 | end if; | |
7970 | ||
7971 | Write_Int (Int (Typ)); | |
7972 | Write_Str (": "); | |
7973 | Write_Name (Chars (Typ)); | |
7974 | ||
7975 | if Is_Interface (Typ) then | |
7976 | Write_Str (" is interface"); | |
7977 | end if; | |
7978 | ||
7979 | Write_Eol; | |
7980 | ||
7981 | Elmt := First_Elmt (Primitive_Operations (Typ)); | |
7982 | while Present (Elmt) loop | |
7983 | Prim := Node (Elmt); | |
7984 | Write_Str (" - "); | |
7985 | ||
7986 | -- Indicate if this primitive will be allocated in the primary | |
7987 | -- dispatch table or in a secondary dispatch table associated | |
7988 | -- with an abstract interface type | |
7989 | ||
7990 | if Present (DTC_Entity (Prim)) then | |
7991 | if Etype (DTC_Entity (Prim)) = RTE (RE_Tag) then | |
7992 | Write_Str ("[P] "); | |
7993 | else | |
7994 | Write_Str ("[s] "); | |
7995 | end if; | |
7996 | end if; | |
7997 | ||
7998 | -- Output the node of this primitive operation and its name | |
7999 | ||
8000 | Write_Int (Int (Prim)); | |
8001 | Write_Str (": "); | |
68f95949 | 8002 | |
8003 | if Is_Predefined_Dispatching_Operation (Prim) then | |
8004 | Write_Str ("(predefined) "); | |
8005 | end if; | |
8006 | ||
b381b314 | 8007 | -- Prefix the name of the primitive with its corresponding tagged |
8008 | -- type to facilitate seeing inherited primitives. | |
8009 | ||
8010 | if Present (Alias (Prim)) then | |
8011 | Write_Name | |
8012 | (Chars (Find_Dispatching_Type (Ultimate_Alias (Prim)))); | |
8013 | else | |
8014 | Write_Name (Chars (Typ)); | |
8015 | end if; | |
8016 | ||
8017 | Write_Str ("."); | |
aad6babd | 8018 | Write_Name (Chars (Prim)); |
8019 | ||
8020 | -- Indicate if this primitive has an aliased primitive | |
8021 | ||
8022 | if Present (Alias (Prim)) then | |
8023 | Write_Str (" (alias = "); | |
8024 | Write_Int (Int (Alias (Prim))); | |
8025 | ||
8026 | -- If the DTC_Entity attribute is already set we can also output | |
4c58ddd7 | 8027 | -- the name of the interface covered by this primitive (if any). |
aad6babd | 8028 | |
8029 | if Present (DTC_Entity (Alias (Prim))) | |
8030 | and then Is_Interface (Scope (DTC_Entity (Alias (Prim)))) | |
8031 | then | |
8032 | Write_Str (" from interface "); | |
8033 | Write_Name (Chars (Scope (DTC_Entity (Alias (Prim))))); | |
8034 | end if; | |
8035 | ||
a652dd51 | 8036 | if Present (Interface_Alias (Prim)) then |
aad6babd | 8037 | Write_Str (", AI_Alias of "); |
f235fede | 8038 | |
8039 | if Is_Null_Interface_Primitive (Interface_Alias (Prim)) then | |
8040 | Write_Str ("null primitive "); | |
8041 | end if; | |
8042 | ||
a652dd51 | 8043 | Write_Name |
8044 | (Chars (Find_Dispatching_Type (Interface_Alias (Prim)))); | |
aad6babd | 8045 | Write_Char (':'); |
a652dd51 | 8046 | Write_Int (Int (Interface_Alias (Prim))); |
aad6babd | 8047 | end if; |
8048 | ||
8049 | Write_Str (")"); | |
8050 | end if; | |
8051 | ||
8052 | -- Display the final position of this primitive in its associated | |
8053 | -- (primary or secondary) dispatch table | |
8054 | ||
8055 | if Present (DTC_Entity (Prim)) | |
8056 | and then DT_Position (Prim) /= No_Uint | |
8057 | then | |
8058 | Write_Str (" at #"); | |
8059 | Write_Int (UI_To_Int (DT_Position (Prim))); | |
8060 | end if; | |
8061 | ||
343d35dc | 8062 | if Is_Abstract_Subprogram (Prim) then |
aad6babd | 8063 | Write_Str (" is abstract;"); |
af647dc7 | 8064 | |
8065 | -- Check if this is a null primitive | |
8066 | ||
8067 | elsif Comes_From_Source (Prim) | |
8068 | and then Ekind (Prim) = E_Procedure | |
8069 | and then Null_Present (Parent (Prim)) | |
8070 | then | |
8071 | Write_Str (" is null;"); | |
aad6babd | 8072 | end if; |
8073 | ||
555c63a6 | 8074 | if Is_Eliminated (Ultimate_Alias (Prim)) then |
8075 | Write_Str (" (eliminated)"); | |
8076 | end if; | |
8077 | ||
d00681a7 | 8078 | if Is_Imported (Prim) |
8079 | and then Convention (Prim) = Convention_CPP | |
8080 | then | |
8081 | Write_Str (" (C++)"); | |
8082 | end if; | |
8083 | ||
aad6babd | 8084 | Write_Eol; |
8085 | ||
8086 | Next_Elmt (Elmt); | |
8087 | end loop; | |
8088 | end Write_DT; | |
8089 | ||
ee6ba406 | 8090 | end Exp_Disp; |