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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 | -- -- | |
15a67a0a | 9 | -- Copyright (C) 1992-2014, 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; |
e00e091c | 34 | with Exp_CG; use Exp_CG; |
76a1c25b | 35 | with Exp_Dbug; use Exp_Dbug; |
ee6ba406 | 36 | with Exp_Tss; use Exp_Tss; |
37 | with Exp_Util; use Exp_Util; | |
af647dc7 | 38 | with Freeze; use Freeze; |
ee6ba406 | 39 | with Itypes; use Itypes; |
b6b96867 | 40 | with Layout; use Layout; |
ee6ba406 | 41 | with Nlists; use Nlists; |
42 | with Nmake; use Nmake; | |
aad6babd | 43 | with Namet; use Namet; |
ee6ba406 | 44 | with Opt; use Opt; |
aad6babd | 45 | with Output; use Output; |
68f95949 | 46 | with Restrict; use Restrict; |
47 | with Rident; use Rident; | |
ee6ba406 | 48 | with Rtsfind; use Rtsfind; |
aad6babd | 49 | with Sem; use Sem; |
d60c9ff7 | 50 | with Sem_Aux; use Sem_Aux; |
725a69d2 | 51 | with Sem_Ch6; use Sem_Ch6; |
acf97c11 | 52 | with Sem_Ch7; use Sem_Ch7; |
725a69d2 | 53 | with Sem_Ch8; use Sem_Ch8; |
ee6ba406 | 54 | with Sem_Disp; use Sem_Disp; |
725a69d2 | 55 | with Sem_Eval; use Sem_Eval; |
ee6ba406 | 56 | with Sem_Res; use Sem_Res; |
aad6babd | 57 | with Sem_Type; use Sem_Type; |
ee6ba406 | 58 | with Sem_Util; use Sem_Util; |
59 | with Sinfo; use Sinfo; | |
60 | with Snames; use Snames; | |
61 | with Stand; use Stand; | |
725a69d2 | 62 | with Stringt; use Stringt; |
5a44b136 | 63 | with SCIL_LL; use SCIL_LL; |
79500ea0 | 64 | with Targparm; use Targparm; |
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 | ||
bb5dfacc | 78 | function Find_Specific_Type (CW : Entity_Id) return Entity_Id; |
79 | -- Find specific type of a class-wide type, and handle the case of an | |
ad6b44d8 | 80 | -- incomplete type coming either from a limited_with clause or from an |
81 | -- incomplete type declaration. Shouldn't this be in Sem_Util? It seems | |
82 | -- like a general purpose semantic routine ??? | |
bb5dfacc | 83 | |
24971415 | 84 | function Has_DT (Typ : Entity_Id) return Boolean; |
85 | pragma Inline (Has_DT); | |
86 | -- Returns true if we generate a dispatch table for tagged type Typ | |
87 | ||
af647dc7 | 88 | function Is_Predefined_Dispatching_Alias (Prim : Entity_Id) return Boolean; |
89 | -- Returns true if Prim is not a predefined dispatching primitive but it is | |
36b938a3 | 90 | -- an alias of a predefined dispatching primitive (i.e. through a renaming) |
af647dc7 | 91 | |
cd534f03 | 92 | function New_Value (From : Node_Id) return Node_Id; |
93 | -- From is the original Expression. New_Value is equivalent to a call | |
94 | -- to Duplicate_Subexpr with an explicit dereference when From is an | |
95 | -- access parameter. | |
96 | ||
ee6ba406 | 97 | function Original_View_In_Visible_Part (Typ : Entity_Id) return Boolean; |
98 | -- Check if the type has a private view or if the public view appears | |
99 | -- in the visible part of a package spec. | |
100 | ||
d62940bf | 101 | function Prim_Op_Kind |
102 | (Prim : Entity_Id; | |
103 | Typ : Entity_Id) return Node_Id; | |
104 | -- Ada 2005 (AI-345): Determine the primitive operation kind of Prim | |
952af0b9 | 105 | -- according to its type Typ. Return a reference to an RE_Prim_Op_Kind |
d62940bf | 106 | -- enumeration value. |
aad6babd | 107 | |
952af0b9 | 108 | function Tagged_Kind (T : Entity_Id) return Node_Id; |
109 | -- Ada 2005 (AI-345): Determine the tagged kind of T and return a reference | |
110 | -- to an RE_Tagged_Kind enumeration value. | |
111 | ||
cd534f03 | 112 | ---------------------- |
113 | -- Apply_Tag_Checks -- | |
114 | ---------------------- | |
115 | ||
116 | procedure Apply_Tag_Checks (Call_Node : Node_Id) is | |
117 | Loc : constant Source_Ptr := Sloc (Call_Node); | |
118 | Ctrl_Arg : constant Node_Id := Controlling_Argument (Call_Node); | |
119 | Ctrl_Typ : constant Entity_Id := Base_Type (Etype (Ctrl_Arg)); | |
120 | Param_List : constant List_Id := Parameter_Associations (Call_Node); | |
121 | ||
122 | Subp : Entity_Id; | |
123 | CW_Typ : Entity_Id; | |
124 | Param : Node_Id; | |
125 | Typ : Entity_Id; | |
126 | Eq_Prim_Op : Entity_Id := Empty; | |
127 | ||
128 | begin | |
129 | if No_Run_Time_Mode then | |
130 | Error_Msg_CRT ("tagged types", Call_Node); | |
131 | return; | |
132 | end if; | |
133 | ||
134 | -- Apply_Tag_Checks is called directly from the semantics, so we need | |
135 | -- a check to see whether expansion is active before proceeding. In | |
136 | -- addition, there is no need to expand the call when compiling under | |
137 | -- restriction No_Dispatching_Calls; the semantic analyzer has | |
138 | -- previously notified the violation of this restriction. | |
139 | ||
140 | if not Expander_Active | |
141 | or else Restriction_Active (No_Dispatching_Calls) | |
142 | then | |
143 | return; | |
144 | end if; | |
145 | ||
146 | -- Set subprogram. If this is an inherited operation that was | |
147 | -- overridden, the body that is being called is its alias. | |
148 | ||
149 | Subp := Entity (Name (Call_Node)); | |
150 | ||
151 | if Present (Alias (Subp)) | |
152 | and then Is_Inherited_Operation (Subp) | |
153 | and then No (DTC_Entity (Subp)) | |
154 | then | |
155 | Subp := Alias (Subp); | |
156 | end if; | |
157 | ||
158 | -- Definition of the class-wide type and the tagged type | |
159 | ||
160 | -- If the controlling argument is itself a tag rather than a tagged | |
161 | -- object, then use the class-wide type associated with the subprogram's | |
162 | -- controlling type. This case can occur when a call to an inherited | |
163 | -- primitive has an actual that originated from a default parameter | |
164 | -- given by a tag-indeterminate call and when there is no other | |
165 | -- controlling argument providing the tag (AI-239 requires dispatching). | |
166 | -- This capability of dispatching directly by tag is also needed by the | |
167 | -- implementation of AI-260 (for the generic dispatching constructors). | |
168 | ||
169 | if Ctrl_Typ = RTE (RE_Tag) | |
170 | or else (RTE_Available (RE_Interface_Tag) | |
171 | and then Ctrl_Typ = RTE (RE_Interface_Tag)) | |
172 | then | |
173 | CW_Typ := Class_Wide_Type (Find_Dispatching_Type (Subp)); | |
174 | ||
175 | -- Class_Wide_Type is applied to the expressions used to initialize | |
176 | -- CW_Typ, to ensure that CW_Typ always denotes a class-wide type, since | |
177 | -- there are cases where the controlling type is resolved to a specific | |
178 | -- type (such as for designated types of arguments such as CW'Access). | |
179 | ||
180 | elsif Is_Access_Type (Ctrl_Typ) then | |
181 | CW_Typ := Class_Wide_Type (Designated_Type (Ctrl_Typ)); | |
182 | ||
183 | else | |
184 | CW_Typ := Class_Wide_Type (Ctrl_Typ); | |
185 | end if; | |
186 | ||
bb5dfacc | 187 | Typ := Find_Specific_Type (CW_Typ); |
cd534f03 | 188 | |
189 | if not Is_Limited_Type (Typ) then | |
190 | Eq_Prim_Op := Find_Prim_Op (Typ, Name_Op_Eq); | |
191 | end if; | |
192 | ||
193 | -- Dispatching call to C++ primitive | |
194 | ||
195 | if Is_CPP_Class (Typ) then | |
196 | null; | |
197 | ||
198 | -- Dispatching call to Ada primitive | |
199 | ||
200 | elsif Present (Param_List) then | |
201 | ||
202 | -- Generate the Tag checks when appropriate | |
203 | ||
204 | Param := First_Actual (Call_Node); | |
205 | while Present (Param) loop | |
206 | ||
207 | -- No tag check with itself | |
208 | ||
209 | if Param = Ctrl_Arg then | |
210 | null; | |
211 | ||
212 | -- No tag check for parameter whose type is neither tagged nor | |
213 | -- access to tagged (for access parameters) | |
214 | ||
215 | elsif No (Find_Controlling_Arg (Param)) then | |
216 | null; | |
217 | ||
218 | -- No tag check for function dispatching on result if the | |
219 | -- Tag given by the context is this one | |
220 | ||
221 | elsif Find_Controlling_Arg (Param) = Ctrl_Arg then | |
222 | null; | |
223 | ||
224 | -- "=" is the only dispatching operation allowed to get | |
225 | -- operands with incompatible tags (it just returns false). | |
226 | -- We use Duplicate_Subexpr_Move_Checks instead of calling | |
227 | -- Relocate_Node because the value will be duplicated to | |
228 | -- check the tags. | |
229 | ||
230 | elsif Subp = Eq_Prim_Op then | |
231 | null; | |
232 | ||
233 | -- No check in presence of suppress flags | |
234 | ||
235 | elsif Tag_Checks_Suppressed (Etype (Param)) | |
236 | or else (Is_Access_Type (Etype (Param)) | |
237 | and then Tag_Checks_Suppressed | |
238 | (Designated_Type (Etype (Param)))) | |
239 | then | |
240 | null; | |
241 | ||
242 | -- Optimization: no tag checks if the parameters are identical | |
243 | ||
244 | elsif Is_Entity_Name (Param) | |
245 | and then Is_Entity_Name (Ctrl_Arg) | |
246 | and then Entity (Param) = Entity (Ctrl_Arg) | |
247 | then | |
248 | null; | |
249 | ||
250 | -- Now we need to generate the Tag check | |
251 | ||
252 | else | |
253 | -- Generate code for tag equality check | |
254 | -- Perhaps should have Checks.Apply_Tag_Equality_Check??? | |
255 | ||
256 | Insert_Action (Ctrl_Arg, | |
257 | Make_Implicit_If_Statement (Call_Node, | |
258 | Condition => | |
259 | Make_Op_Ne (Loc, | |
260 | Left_Opnd => | |
261 | Make_Selected_Component (Loc, | |
262 | Prefix => New_Value (Ctrl_Arg), | |
263 | Selector_Name => | |
83c6c069 | 264 | New_Occurrence_Of |
cd534f03 | 265 | (First_Tag_Component (Typ), Loc)), |
266 | ||
267 | Right_Opnd => | |
268 | Make_Selected_Component (Loc, | |
269 | Prefix => | |
270 | Unchecked_Convert_To (Typ, New_Value (Param)), | |
271 | Selector_Name => | |
83c6c069 | 272 | New_Occurrence_Of |
cd534f03 | 273 | (First_Tag_Component (Typ), Loc))), |
274 | ||
275 | Then_Statements => | |
276 | New_List (New_Constraint_Error (Loc)))); | |
277 | end if; | |
278 | ||
279 | Next_Actual (Param); | |
280 | end loop; | |
281 | end if; | |
282 | end Apply_Tag_Checks; | |
283 | ||
24971415 | 284 | ------------------------ |
285 | -- Building_Static_DT -- | |
286 | ------------------------ | |
287 | ||
288 | function Building_Static_DT (Typ : Entity_Id) return Boolean is | |
cc60bd16 | 289 | Root_Typ : Entity_Id := Root_Type (Typ); |
290 | ||
24971415 | 291 | begin |
cc60bd16 | 292 | -- Handle private types |
293 | ||
294 | if Present (Full_View (Root_Typ)) then | |
295 | Root_Typ := Full_View (Root_Typ); | |
296 | end if; | |
297 | ||
24971415 | 298 | return Static_Dispatch_Tables |
e7e688dd | 299 | and then Is_Library_Level_Tagged_Type (Typ) |
79500ea0 | 300 | and then VM_Target = No_VM |
e7e688dd | 301 | |
302 | -- If the type is derived from a CPP class we cannot statically | |
303 | -- build the dispatch tables because we must inherit primitives | |
304 | -- from the CPP side. | |
305 | ||
cc60bd16 | 306 | and then not Is_CPP_Class (Root_Typ); |
24971415 | 307 | end Building_Static_DT; |
308 | ||
17e14451 | 309 | ---------------------------------- |
310 | -- Build_Static_Dispatch_Tables -- | |
311 | ---------------------------------- | |
312 | ||
313 | procedure Build_Static_Dispatch_Tables (N : Entity_Id) is | |
314 | Target_List : List_Id; | |
315 | ||
316 | procedure Build_Dispatch_Tables (List : List_Id); | |
317 | -- Build the static dispatch table of tagged types found in the list of | |
318 | -- declarations. The generated nodes are added at the end of Target_List | |
319 | ||
320 | procedure Build_Package_Dispatch_Tables (N : Node_Id); | |
321 | -- Build static dispatch tables associated with package declaration N | |
322 | ||
323 | --------------------------- | |
324 | -- Build_Dispatch_Tables -- | |
325 | --------------------------- | |
326 | ||
327 | procedure Build_Dispatch_Tables (List : List_Id) is | |
328 | D : Node_Id; | |
329 | ||
330 | begin | |
331 | D := First (List); | |
332 | while Present (D) loop | |
333 | ||
334 | -- Handle nested packages and package bodies recursively. The | |
335 | -- generated code is placed on the Target_List established for | |
336 | -- the enclosing compilation unit. | |
337 | ||
338 | if Nkind (D) = N_Package_Declaration then | |
339 | Build_Package_Dispatch_Tables (D); | |
340 | ||
341 | elsif Nkind (D) = N_Package_Body then | |
342 | Build_Dispatch_Tables (Declarations (D)); | |
343 | ||
344 | elsif Nkind (D) = N_Package_Body_Stub | |
345 | and then Present (Library_Unit (D)) | |
346 | then | |
347 | Build_Dispatch_Tables | |
348 | (Declarations (Proper_Body (Unit (Library_Unit (D))))); | |
349 | ||
350 | -- Handle full type declarations and derivations of library | |
351 | -- level tagged types | |
352 | ||
3164ed99 | 353 | elsif Nkind_In (D, N_Full_Type_Declaration, |
354 | N_Derived_Type_Definition) | |
17e14451 | 355 | and then Is_Library_Level_Tagged_Type (Defining_Entity (D)) |
356 | and then Ekind (Defining_Entity (D)) /= E_Record_Subtype | |
357 | and then not Is_Private_Type (Defining_Entity (D)) | |
358 | then | |
442049cc | 359 | -- We do not generate dispatch tables for the internal types |
d9fac90e | 360 | -- created for a type extension with unknown discriminants |
361 | -- The needed information is shared with the source type, | |
362 | -- See Expand_N_Record_Extension. | |
363 | ||
442049cc | 364 | if Is_Underlying_Record_View (Defining_Entity (D)) |
365 | or else | |
366 | (not Comes_From_Source (Defining_Entity (D)) | |
367 | and then | |
2f29393f | 368 | Has_Unknown_Discriminants (Etype (Defining_Entity (D))) |
442049cc | 369 | and then |
2f29393f | 370 | not Comes_From_Source |
371 | (First_Subtype (Defining_Entity (D)))) | |
d9fac90e | 372 | then |
373 | null; | |
d9fac90e | 374 | else |
375 | Insert_List_After_And_Analyze (Last (Target_List), | |
376 | Make_DT (Defining_Entity (D))); | |
377 | end if; | |
17e14451 | 378 | |
379 | -- Handle private types of library level tagged types. We must | |
380 | -- exchange the private and full-view to ensure the correct | |
a735d663 | 381 | -- expansion. If the full view is a synchronized type ignore |
382 | -- the type because the table will be built for the corresponding | |
383 | -- record type, that has its own declaration. | |
17e14451 | 384 | |
385 | elsif (Nkind (D) = N_Private_Type_Declaration | |
386 | or else Nkind (D) = N_Private_Extension_Declaration) | |
387 | and then Present (Full_View (Defining_Entity (D))) | |
17e14451 | 388 | then |
389 | declare | |
acf97c11 | 390 | E1 : constant Entity_Id := Defining_Entity (D); |
a735d663 | 391 | E2 : constant Entity_Id := Full_View (E1); |
acf97c11 | 392 | |
17e14451 | 393 | begin |
a735d663 | 394 | if Is_Library_Level_Tagged_Type (E2) |
395 | and then Ekind (E2) /= E_Record_Subtype | |
396 | and then not Is_Concurrent_Type (E2) | |
397 | then | |
398 | Exchange_Declarations (E1); | |
399 | Insert_List_After_And_Analyze (Last (Target_List), | |
400 | Make_DT (E1)); | |
401 | Exchange_Declarations (E2); | |
402 | end if; | |
17e14451 | 403 | end; |
404 | end if; | |
405 | ||
406 | Next (D); | |
407 | end loop; | |
408 | end Build_Dispatch_Tables; | |
409 | ||
410 | ----------------------------------- | |
411 | -- Build_Package_Dispatch_Tables -- | |
412 | ----------------------------------- | |
413 | ||
414 | procedure Build_Package_Dispatch_Tables (N : Node_Id) is | |
415 | Spec : constant Node_Id := Specification (N); | |
416 | Id : constant Entity_Id := Defining_Entity (N); | |
417 | Vis_Decls : constant List_Id := Visible_Declarations (Spec); | |
418 | Priv_Decls : constant List_Id := Private_Declarations (Spec); | |
419 | ||
420 | begin | |
421 | Push_Scope (Id); | |
422 | ||
423 | if Present (Priv_Decls) then | |
424 | Build_Dispatch_Tables (Vis_Decls); | |
425 | Build_Dispatch_Tables (Priv_Decls); | |
426 | ||
427 | elsif Present (Vis_Decls) then | |
428 | Build_Dispatch_Tables (Vis_Decls); | |
429 | end if; | |
430 | ||
431 | Pop_Scope; | |
432 | end Build_Package_Dispatch_Tables; | |
433 | ||
434 | -- Start of processing for Build_Static_Dispatch_Tables | |
435 | ||
436 | begin | |
437 | if not Expander_Active | |
662256db | 438 | or else not Tagged_Type_Expansion |
17e14451 | 439 | then |
440 | return; | |
441 | end if; | |
442 | ||
443 | if Nkind (N) = N_Package_Declaration then | |
444 | declare | |
445 | Spec : constant Node_Id := Specification (N); | |
446 | Vis_Decls : constant List_Id := Visible_Declarations (Spec); | |
447 | Priv_Decls : constant List_Id := Private_Declarations (Spec); | |
448 | ||
449 | begin | |
450 | if Present (Priv_Decls) | |
451 | and then Is_Non_Empty_List (Priv_Decls) | |
452 | then | |
453 | Target_List := Priv_Decls; | |
454 | ||
455 | elsif not Present (Vis_Decls) then | |
456 | Target_List := New_List; | |
457 | Set_Private_Declarations (Spec, Target_List); | |
458 | else | |
459 | Target_List := Vis_Decls; | |
460 | end if; | |
461 | ||
462 | Build_Package_Dispatch_Tables (N); | |
463 | end; | |
464 | ||
465 | else pragma Assert (Nkind (N) = N_Package_Body); | |
466 | Target_List := Declarations (N); | |
467 | Build_Dispatch_Tables (Target_List); | |
468 | end if; | |
469 | end Build_Static_Dispatch_Tables; | |
470 | ||
f235fede | 471 | ------------------------------ |
472 | -- Convert_Tag_To_Interface -- | |
473 | ------------------------------ | |
474 | ||
475 | function Convert_Tag_To_Interface | |
476 | (Typ : Entity_Id; | |
477 | Expr : Node_Id) return Node_Id | |
478 | is | |
479 | Loc : constant Source_Ptr := Sloc (Expr); | |
480 | Anon_Type : Entity_Id; | |
481 | Result : Node_Id; | |
482 | ||
483 | begin | |
484 | pragma Assert (Is_Class_Wide_Type (Typ) | |
485 | and then Is_Interface (Typ) | |
486 | and then | |
487 | ((Nkind (Expr) = N_Selected_Component | |
4c58ddd7 | 488 | and then Is_Tag (Entity (Selector_Name (Expr)))) |
f235fede | 489 | or else |
490 | (Nkind (Expr) = N_Function_Call | |
4c58ddd7 | 491 | and then RTE_Available (RE_Displace) |
492 | and then Entity (Name (Expr)) = RTE (RE_Displace)))); | |
f235fede | 493 | |
494 | Anon_Type := Create_Itype (E_Anonymous_Access_Type, Expr); | |
495 | Set_Directly_Designated_Type (Anon_Type, Typ); | |
496 | Set_Etype (Anon_Type, Anon_Type); | |
497 | Set_Can_Never_Be_Null (Anon_Type); | |
498 | ||
499 | -- Decorate the size and alignment attributes of the anonymous access | |
500 | -- type, as required by gigi. | |
501 | ||
502 | Layout_Type (Anon_Type); | |
503 | ||
504 | if Nkind (Expr) = N_Selected_Component | |
505 | and then Is_Tag (Entity (Selector_Name (Expr))) | |
506 | then | |
507 | Result := | |
508 | Make_Explicit_Dereference (Loc, | |
509 | Unchecked_Convert_To (Anon_Type, | |
510 | Make_Attribute_Reference (Loc, | |
511 | Prefix => Expr, | |
512 | Attribute_Name => Name_Address))); | |
513 | else | |
514 | Result := | |
515 | Make_Explicit_Dereference (Loc, | |
516 | Unchecked_Convert_To (Anon_Type, Expr)); | |
517 | end if; | |
518 | ||
519 | return Result; | |
520 | end Convert_Tag_To_Interface; | |
521 | ||
d00681a7 | 522 | ------------------- |
523 | -- CPP_Num_Prims -- | |
524 | ------------------- | |
525 | ||
526 | function CPP_Num_Prims (Typ : Entity_Id) return Nat is | |
527 | CPP_Typ : Entity_Id; | |
528 | Tag_Comp : Entity_Id; | |
529 | ||
530 | begin | |
531 | if not Is_Tagged_Type (Typ) | |
532 | or else not Is_CPP_Class (Root_Type (Typ)) | |
533 | then | |
534 | return 0; | |
535 | ||
536 | else | |
537 | CPP_Typ := Enclosing_CPP_Parent (Typ); | |
538 | Tag_Comp := First_Tag_Component (CPP_Typ); | |
539 | ||
540 | -- If the number of primitives is already set in the tag component | |
541 | -- then use it | |
542 | ||
543 | if Present (Tag_Comp) | |
544 | and then DT_Entry_Count (Tag_Comp) /= No_Uint | |
545 | then | |
546 | return UI_To_Int (DT_Entry_Count (Tag_Comp)); | |
547 | ||
548 | -- Otherwise, count the primitives of the enclosing CPP type | |
549 | ||
550 | else | |
551 | declare | |
552 | Count : Nat := 0; | |
553 | Elmt : Elmt_Id; | |
554 | ||
555 | begin | |
556 | Elmt := First_Elmt (Primitive_Operations (CPP_Typ)); | |
557 | while Present (Elmt) loop | |
558 | Count := Count + 1; | |
559 | Next_Elmt (Elmt); | |
560 | end loop; | |
561 | ||
562 | return Count; | |
563 | end; | |
564 | end if; | |
565 | end if; | |
566 | end CPP_Num_Prims; | |
567 | ||
aad6babd | 568 | ------------------------------ |
569 | -- Default_Prim_Op_Position -- | |
570 | ------------------------------ | |
571 | ||
68f95949 | 572 | function Default_Prim_Op_Position (E : Entity_Id) return Uint is |
aad6babd | 573 | TSS_Name : TSS_Name_Type; |
aad6babd | 574 | |
575 | begin | |
aad6babd | 576 | Get_Name_String (Chars (E)); |
577 | TSS_Name := | |
578 | TSS_Name_Type | |
579 | (Name_Buffer (Name_Len - TSS_Name'Length + 1 .. Name_Len)); | |
580 | ||
581 | if Chars (E) = Name_uSize then | |
582 | return Uint_1; | |
583 | ||
aad6babd | 584 | elsif TSS_Name = TSS_Stream_Read then |
208fd589 | 585 | return Uint_2; |
aad6babd | 586 | |
587 | elsif TSS_Name = TSS_Stream_Write then | |
208fd589 | 588 | return Uint_3; |
aad6babd | 589 | |
590 | elsif TSS_Name = TSS_Stream_Input then | |
208fd589 | 591 | return Uint_4; |
aad6babd | 592 | |
593 | elsif TSS_Name = TSS_Stream_Output then | |
208fd589 | 594 | return Uint_5; |
aad6babd | 595 | |
596 | elsif Chars (E) = Name_Op_Eq then | |
208fd589 | 597 | return Uint_6; |
aad6babd | 598 | |
599 | elsif Chars (E) = Name_uAssign then | |
208fd589 | 600 | return Uint_7; |
aad6babd | 601 | |
602 | elsif TSS_Name = TSS_Deep_Adjust then | |
208fd589 | 603 | return Uint_8; |
aad6babd | 604 | |
605 | elsif TSS_Name = TSS_Deep_Finalize then | |
208fd589 | 606 | return Uint_9; |
aad6babd | 607 | |
6cb4b973 | 608 | -- In VM targets unconditionally allow obtaining the position associated |
609 | -- with predefined interface primitives since in these platforms any | |
610 | -- tagged type has these primitives. | |
611 | ||
612 | elsif Ada_Version >= Ada_2005 or else not Tagged_Type_Expansion then | |
76a1c25b | 613 | if Chars (E) = Name_uDisp_Asynchronous_Select then |
208fd589 | 614 | return Uint_10; |
d62940bf | 615 | |
76a1c25b | 616 | elsif Chars (E) = Name_uDisp_Conditional_Select then |
208fd589 | 617 | return Uint_11; |
d62940bf | 618 | |
76a1c25b | 619 | elsif Chars (E) = Name_uDisp_Get_Prim_Op_Kind then |
208fd589 | 620 | return Uint_12; |
d62940bf | 621 | |
76a1c25b | 622 | elsif Chars (E) = Name_uDisp_Get_Task_Id then |
208fd589 | 623 | return Uint_13; |
d62940bf | 624 | |
cdb1c38f | 625 | elsif Chars (E) = Name_uDisp_Requeue then |
208fd589 | 626 | return Uint_14; |
cdb1c38f | 627 | |
628 | elsif Chars (E) = Name_uDisp_Timed_Select then | |
208fd589 | 629 | return Uint_15; |
76a1c25b | 630 | end if; |
aad6babd | 631 | end if; |
76a1c25b | 632 | |
633 | raise Program_Error; | |
aad6babd | 634 | end Default_Prim_Op_Position; |
635 | ||
7189d17f | 636 | ----------------------------- |
637 | -- Expand_Dispatching_Call -- | |
638 | ----------------------------- | |
ee6ba406 | 639 | |
7189d17f | 640 | procedure Expand_Dispatching_Call (Call_Node : Node_Id) is |
ee6ba406 | 641 | Loc : constant Source_Ptr := Sloc (Call_Node); |
642 | Call_Typ : constant Entity_Id := Etype (Call_Node); | |
643 | ||
2ea346ac | 644 | Ctrl_Arg : constant Node_Id := Controlling_Argument (Call_Node); |
645 | Ctrl_Typ : constant Entity_Id := Base_Type (Etype (Ctrl_Arg)); | |
646 | Param_List : constant List_Id := Parameter_Associations (Call_Node); | |
ee6ba406 | 647 | |
af647dc7 | 648 | Subp : Entity_Id; |
7189d17f | 649 | CW_Typ : Entity_Id; |
650 | New_Call : Node_Id; | |
651 | New_Call_Name : Node_Id; | |
652 | New_Params : List_Id := No_List; | |
653 | Param : Node_Id; | |
654 | Res_Typ : Entity_Id; | |
655 | Subp_Ptr_Typ : Entity_Id; | |
656 | Subp_Typ : Entity_Id; | |
657 | Typ : Entity_Id; | |
658 | Eq_Prim_Op : Entity_Id := Empty; | |
659 | Controlling_Tag : Node_Id; | |
ee6ba406 | 660 | |
661 | function New_Value (From : Node_Id) return Node_Id; | |
9dfe12ae | 662 | -- From is the original Expression. New_Value is equivalent to a call |
663 | -- to Duplicate_Subexpr with an explicit dereference when From is an | |
7189d17f | 664 | -- access parameter. |
665 | ||
9dfe12ae | 666 | --------------- |
667 | -- New_Value -- | |
668 | --------------- | |
669 | ||
ee6ba406 | 670 | function New_Value (From : Node_Id) return Node_Id is |
671 | Res : constant Node_Id := Duplicate_Subexpr (From); | |
ee6ba406 | 672 | begin |
673 | if Is_Access_Type (Etype (From)) then | |
af647dc7 | 674 | return |
675 | Make_Explicit_Dereference (Sloc (From), | |
676 | Prefix => Res); | |
ee6ba406 | 677 | else |
678 | return Res; | |
679 | end if; | |
680 | end New_Value; | |
681 | ||
d215f619 | 682 | -- Local variables |
683 | ||
5a44b136 | 684 | New_Node : Node_Id; |
685 | SCIL_Node : Node_Id; | |
686 | SCIL_Related_Node : Node_Id := Call_Node; | |
d215f619 | 687 | |
7189d17f | 688 | -- Start of processing for Expand_Dispatching_Call |
ee6ba406 | 689 | |
690 | begin | |
725a69d2 | 691 | if No_Run_Time_Mode then |
692 | Error_Msg_CRT ("tagged types", Call_Node); | |
693 | return; | |
694 | end if; | |
695 | ||
343d35dc | 696 | -- Expand_Dispatching_Call is called directly from the semantics, |
0f3b1f49 | 697 | -- so we only proceed if the expander is active. |
343d35dc | 698 | |
a33565dd | 699 | if not Expander_Active |
0f3b1f49 | 700 | |
701 | -- And there is no need to expand the call if we are compiling under | |
702 | -- restriction No_Dispatching_Calls; the semantic analyzer has | |
703 | -- previously notified the violation of this restriction. | |
704 | ||
343d35dc | 705 | or else Restriction_Active (No_Dispatching_Calls) |
687b5687 | 706 | |
707 | -- No action needed if the dispatching call has been already expanded | |
708 | ||
709 | or else Is_Expanded_Dispatching_Call (Name (Call_Node)) | |
343d35dc | 710 | then |
711 | return; | |
712 | end if; | |
68f95949 | 713 | |
af647dc7 | 714 | -- Set subprogram. If this is an inherited operation that was |
715 | -- overridden, the body that is being called is its alias. | |
716 | ||
717 | Subp := Entity (Name (Call_Node)); | |
ee6ba406 | 718 | |
719 | if Present (Alias (Subp)) | |
720 | and then Is_Inherited_Operation (Subp) | |
721 | and then No (DTC_Entity (Subp)) | |
722 | then | |
723 | Subp := Alias (Subp); | |
724 | end if; | |
725 | ||
7189d17f | 726 | -- Definition of the class-wide type and the tagged type |
ee6ba406 | 727 | |
7189d17f | 728 | -- If the controlling argument is itself a tag rather than a tagged |
729 | -- object, then use the class-wide type associated with the subprogram's | |
730 | -- controlling type. This case can occur when a call to an inherited | |
731 | -- primitive has an actual that originated from a default parameter | |
732 | -- given by a tag-indeterminate call and when there is no other | |
733 | -- controlling argument providing the tag (AI-239 requires dispatching). | |
734 | -- This capability of dispatching directly by tag is also needed by the | |
735 | -- implementation of AI-260 (for the generic dispatching constructors). | |
736 | ||
2ea346ac | 737 | if Ctrl_Typ = RTE (RE_Tag) |
68f95949 | 738 | or else (RTE_Available (RE_Interface_Tag) |
2ea346ac | 739 | and then Ctrl_Typ = RTE (RE_Interface_Tag)) |
aad6babd | 740 | then |
af647dc7 | 741 | CW_Typ := Class_Wide_Type (Find_Dispatching_Type (Subp)); |
7189d17f | 742 | |
725a69d2 | 743 | -- Class_Wide_Type is applied to the expressions used to initialize |
744 | -- CW_Typ, to ensure that CW_Typ always denotes a class-wide type, since | |
745 | -- there are cases where the controlling type is resolved to a specific | |
746 | -- type (such as for designated types of arguments such as CW'Access). | |
747 | ||
2ea346ac | 748 | elsif Is_Access_Type (Ctrl_Typ) then |
749 | CW_Typ := Class_Wide_Type (Designated_Type (Ctrl_Typ)); | |
7189d17f | 750 | |
ee6ba406 | 751 | else |
2ea346ac | 752 | CW_Typ := Class_Wide_Type (Ctrl_Typ); |
ee6ba406 | 753 | end if; |
754 | ||
bb5dfacc | 755 | Typ := Find_Specific_Type (CW_Typ); |
d62940bf | 756 | |
ee6ba406 | 757 | if not Is_Limited_Type (Typ) then |
758 | Eq_Prim_Op := Find_Prim_Op (Typ, Name_Op_Eq); | |
759 | end if; | |
760 | ||
343d35dc | 761 | -- Dispatching call to C++ primitive. Create a new parameter list |
762 | -- with no tag checks. | |
ee6ba406 | 763 | |
cd534f03 | 764 | New_Params := New_List; |
765 | ||
343d35dc | 766 | if Is_CPP_Class (Typ) then |
ee6ba406 | 767 | Param := First_Actual (Call_Node); |
768 | while Present (Param) loop | |
aad6babd | 769 | Append_To (New_Params, Relocate_Node (Param)); |
ee6ba406 | 770 | Next_Actual (Param); |
771 | end loop; | |
772 | ||
343d35dc | 773 | -- Dispatching call to Ada primitive |
774 | ||
ee6ba406 | 775 | elsif Present (Param_List) then |
cd534f03 | 776 | Apply_Tag_Checks (Call_Node); |
ee6ba406 | 777 | |
ee6ba406 | 778 | Param := First_Actual (Call_Node); |
779 | while Present (Param) loop | |
780 | ||
f365561f | 781 | -- Cases in which we may have generated run-time checks. Note that |
782 | -- we strip any qualification from Param before comparing with the | |
783 | -- already-stripped controlling argument. | |
784 | ||
785 | if Unqualify (Param) = Ctrl_Arg or else Subp = Eq_Prim_Op then | |
9dfe12ae | 786 | Append_To (New_Params, |
787 | Duplicate_Subexpr_Move_Checks (Param)); | |
ee6ba406 | 788 | |
0429d533 | 789 | elsif Nkind (Parent (Param)) /= N_Parameter_Association |
790 | or else not Is_Accessibility_Actual (Parent (Param)) | |
791 | then | |
ee6ba406 | 792 | Append_To (New_Params, Relocate_Node (Param)); |
793 | end if; | |
794 | ||
795 | Next_Actual (Param); | |
796 | end loop; | |
797 | end if; | |
798 | ||
799 | -- Generate the appropriate subprogram pointer type | |
800 | ||
68f95949 | 801 | if Etype (Subp) = Typ then |
ee6ba406 | 802 | Res_Typ := CW_Typ; |
803 | else | |
7189d17f | 804 | Res_Typ := Etype (Subp); |
ee6ba406 | 805 | end if; |
806 | ||
b6b96867 | 807 | Subp_Typ := Create_Itype (E_Subprogram_Type, Call_Node); |
ee6ba406 | 808 | Subp_Ptr_Typ := Create_Itype (E_Access_Subprogram_Type, Call_Node); |
809 | Set_Etype (Subp_Typ, Res_Typ); | |
ee6ba406 | 810 | Set_Returns_By_Ref (Subp_Typ, Returns_By_Ref (Subp)); |
265200d0 | 811 | Set_Convention (Subp_Typ, Convention (Subp)); |
812 | ||
813 | -- Notify gigi that the designated type is a dispatching primitive | |
814 | ||
815 | Set_Is_Dispatch_Table_Entity (Subp_Typ); | |
ee6ba406 | 816 | |
817 | -- Create a new list of parameters which is a copy of the old formal | |
818 | -- list including the creation of a new set of matching entities. | |
819 | ||
820 | declare | |
821 | Old_Formal : Entity_Id := First_Formal (Subp); | |
822 | New_Formal : Entity_Id; | |
725a69d2 | 823 | Extra : Entity_Id := Empty; |
ee6ba406 | 824 | |
825 | begin | |
826 | if Present (Old_Formal) then | |
827 | New_Formal := New_Copy (Old_Formal); | |
828 | Set_First_Entity (Subp_Typ, New_Formal); | |
829 | Param := First_Actual (Call_Node); | |
830 | ||
831 | loop | |
832 | Set_Scope (New_Formal, Subp_Typ); | |
833 | ||
834 | -- Change all the controlling argument types to be class-wide | |
7189d17f | 835 | -- to avoid a recursion in dispatching. |
ee6ba406 | 836 | |
7189d17f | 837 | if Is_Controlling_Formal (New_Formal) then |
ee6ba406 | 838 | Set_Etype (New_Formal, Etype (Param)); |
839 | end if; | |
840 | ||
cc60bd16 | 841 | -- If the type of the formal is an itype, there was code here |
842 | -- introduced in 1998 in revision 1.46, to create a new itype | |
843 | -- by copy. This seems useless, and in fact leads to semantic | |
844 | -- errors when the itype is the completion of a type derived | |
845 | -- from a private type. | |
ee6ba406 | 846 | |
847 | Extra := New_Formal; | |
848 | Next_Formal (Old_Formal); | |
849 | exit when No (Old_Formal); | |
850 | ||
851 | Set_Next_Entity (New_Formal, New_Copy (Old_Formal)); | |
852 | Next_Entity (New_Formal); | |
853 | Next_Actual (Param); | |
854 | end loop; | |
af647dc7 | 855 | |
856 | Set_Next_Entity (New_Formal, Empty); | |
ee6ba406 | 857 | Set_Last_Entity (Subp_Typ, Extra); |
725a69d2 | 858 | end if; |
ee6ba406 | 859 | |
725a69d2 | 860 | -- Now that the explicit formals have been duplicated, any extra |
861 | -- formals needed by the subprogram must be created. | |
ee6ba406 | 862 | |
725a69d2 | 863 | if Present (Extra) then |
864 | Set_Extra_Formal (Extra, Empty); | |
ee6ba406 | 865 | end if; |
725a69d2 | 866 | |
867 | Create_Extra_Formals (Subp_Typ); | |
ee6ba406 | 868 | end; |
869 | ||
b6b96867 | 870 | -- Complete description of pointer type, including size information, as |
871 | -- must be done with itypes to prevent order-of-elaboration anomalies | |
872 | -- in gigi. | |
873 | ||
ee6ba406 | 874 | Set_Etype (Subp_Ptr_Typ, Subp_Ptr_Typ); |
875 | Set_Directly_Designated_Type (Subp_Ptr_Typ, Subp_Typ); | |
acf97c11 | 876 | Set_Convention (Subp_Ptr_Typ, Convention (Subp_Typ)); |
b6b96867 | 877 | Layout_Type (Subp_Ptr_Typ); |
ee6ba406 | 878 | |
68f95949 | 879 | -- If the controlling argument is a value of type Ada.Tag or an abstract |
880 | -- interface class-wide type then use it directly. Otherwise, the tag | |
881 | -- must be extracted from the controlling object. | |
7189d17f | 882 | |
2ea346ac | 883 | if Ctrl_Typ = RTE (RE_Tag) |
68f95949 | 884 | or else (RTE_Available (RE_Interface_Tag) |
2ea346ac | 885 | and then Ctrl_Typ = RTE (RE_Interface_Tag)) |
68f95949 | 886 | then |
887 | Controlling_Tag := Duplicate_Subexpr (Ctrl_Arg); | |
888 | ||
343d35dc | 889 | -- Extract the tag from an unchecked type conversion. Done to avoid |
890 | -- the expansion of additional code just to obtain the value of such | |
891 | -- tag because the current management of interface type conversions | |
892 | -- generates in some cases this unchecked type conversion with the | |
893 | -- tag of the object (see Expand_Interface_Conversion). | |
894 | ||
895 | elsif Nkind (Ctrl_Arg) = N_Unchecked_Type_Conversion | |
896 | and then | |
897 | (Etype (Expression (Ctrl_Arg)) = RTE (RE_Tag) | |
898 | or else | |
899 | (RTE_Available (RE_Interface_Tag) | |
900 | and then | |
901 | Etype (Expression (Ctrl_Arg)) = RTE (RE_Interface_Tag))) | |
902 | then | |
903 | Controlling_Tag := Duplicate_Subexpr (Expression (Ctrl_Arg)); | |
904 | ||
68f95949 | 905 | -- Ada 2005 (AI-251): Abstract interface class-wide type |
906 | ||
2ea346ac | 907 | elsif Is_Interface (Ctrl_Typ) |
908 | and then Is_Class_Wide_Type (Ctrl_Typ) | |
aad6babd | 909 | then |
7189d17f | 910 | Controlling_Tag := Duplicate_Subexpr (Ctrl_Arg); |
911 | ||
912 | else | |
913 | Controlling_Tag := | |
914 | Make_Selected_Component (Loc, | |
1ea4332a | 915 | Prefix => Duplicate_Subexpr_Move_Checks (Ctrl_Arg), |
83c6c069 | 916 | Selector_Name => New_Occurrence_Of (DTC_Entity (Subp), Loc)); |
7189d17f | 917 | end if; |
918 | ||
1ea4332a | 919 | -- Handle dispatching calls to predefined primitives |
ee6ba406 | 920 | |
af647dc7 | 921 | if Is_Predefined_Dispatching_Operation (Subp) |
922 | or else Is_Predefined_Dispatching_Alias (Subp) | |
923 | then | |
ef40be71 | 924 | Build_Get_Predefined_Prim_Op_Address (Loc, |
925 | Tag_Node => Controlling_Tag, | |
926 | Position => DT_Position (Subp), | |
927 | New_Node => New_Node); | |
ee6ba406 | 928 | |
343d35dc | 929 | -- Handle dispatching calls to user-defined primitives |
68f95949 | 930 | |
931 | else | |
ef40be71 | 932 | Build_Get_Prim_Op_Address (Loc, |
23197014 | 933 | Typ => Underlying_Type (Find_Dispatching_Type (Subp)), |
ef40be71 | 934 | Tag_Node => Controlling_Tag, |
935 | Position => DT_Position (Subp), | |
936 | New_Node => New_Node); | |
68f95949 | 937 | end if; |
ee6ba406 | 938 | |
ef40be71 | 939 | New_Call_Name := |
940 | Unchecked_Convert_To (Subp_Ptr_Typ, New_Node); | |
941 | ||
5a44b136 | 942 | -- Generate the SCIL node for this dispatching call. Done now because |
943 | -- attribute SCIL_Controlling_Tag must be set after the new call name | |
944 | -- is built to reference the nodes that will see the SCIL backend | |
945 | -- (because Build_Get_Prim_Op_Address generates an unchecked type | |
946 | -- conversion which relocates the controlling tag node). | |
ee6ba406 | 947 | |
ef40be71 | 948 | if Generate_SCIL then |
5a44b136 | 949 | SCIL_Node := Make_SCIL_Dispatching_Call (Sloc (Call_Node)); |
950 | Set_SCIL_Entity (SCIL_Node, Typ); | |
951 | Set_SCIL_Target_Prim (SCIL_Node, Subp); | |
ef40be71 | 952 | |
953 | -- Common case: the controlling tag is the tag of an object | |
954 | -- (for example, obj.tag) | |
955 | ||
956 | if Nkind (Controlling_Tag) = N_Selected_Component then | |
957 | Set_SCIL_Controlling_Tag (SCIL_Node, Controlling_Tag); | |
958 | ||
959 | -- Handle renaming of selected component | |
960 | ||
961 | elsif Nkind (Controlling_Tag) = N_Identifier | |
1ea4332a | 962 | and then Nkind (Parent (Entity (Controlling_Tag))) = |
963 | N_Object_Renaming_Declaration | |
964 | and then Nkind (Name (Parent (Entity (Controlling_Tag)))) = | |
965 | N_Selected_Component | |
ef40be71 | 966 | then |
967 | Set_SCIL_Controlling_Tag (SCIL_Node, | |
968 | Name (Parent (Entity (Controlling_Tag)))); | |
969 | ||
970 | -- If the controlling tag is an identifier, the SCIL node references | |
971 | -- the corresponding object or parameter declaration | |
972 | ||
973 | elsif Nkind (Controlling_Tag) = N_Identifier | |
974 | and then Nkind_In (Parent (Entity (Controlling_Tag)), | |
1ea4332a | 975 | N_Object_Declaration, |
976 | N_Parameter_Specification) | |
ef40be71 | 977 | then |
978 | Set_SCIL_Controlling_Tag (SCIL_Node, | |
979 | Parent (Entity (Controlling_Tag))); | |
980 | ||
981 | -- If the controlling tag is a dereference, the SCIL node references | |
982 | -- the corresponding object or parameter declaration | |
983 | ||
984 | elsif Nkind (Controlling_Tag) = N_Explicit_Dereference | |
985 | and then Nkind (Prefix (Controlling_Tag)) = N_Identifier | |
986 | and then Nkind_In (Parent (Entity (Prefix (Controlling_Tag))), | |
1ea4332a | 987 | N_Object_Declaration, |
988 | N_Parameter_Specification) | |
ef40be71 | 989 | then |
990 | Set_SCIL_Controlling_Tag (SCIL_Node, | |
991 | Parent (Entity (Prefix (Controlling_Tag)))); | |
992 | ||
993 | -- For a direct reference of the tag of the type the SCIL node | |
6fb3c314 | 994 | -- references the internal object declaration containing the tag |
ef40be71 | 995 | -- of the type. |
996 | ||
997 | elsif Nkind (Controlling_Tag) = N_Attribute_Reference | |
998 | and then Attribute_Name (Controlling_Tag) = Name_Tag | |
999 | then | |
1000 | Set_SCIL_Controlling_Tag (SCIL_Node, | |
1001 | Parent | |
1ea4332a | 1002 | (Node |
1003 | (First_Elmt | |
1004 | (Access_Disp_Table (Entity (Prefix (Controlling_Tag))))))); | |
ef40be71 | 1005 | |
1006 | -- Interfaces are not supported. For now we leave the SCIL node | |
1007 | -- decorated with the Controlling_Tag. More work needed here??? | |
1008 | ||
1009 | elsif Is_Interface (Etype (Controlling_Tag)) then | |
1010 | Set_SCIL_Controlling_Tag (SCIL_Node, Controlling_Tag); | |
1011 | ||
1012 | else | |
1013 | pragma Assert (False); | |
1014 | null; | |
1015 | end if; | |
1016 | end if; | |
1017 | ||
1018 | if Nkind (Call_Node) = N_Function_Call then | |
725a69d2 | 1019 | New_Call := |
1020 | Make_Function_Call (Loc, | |
1ea4332a | 1021 | Name => New_Call_Name, |
725a69d2 | 1022 | Parameter_Associations => New_Params); |
ee6ba406 | 1023 | |
725a69d2 | 1024 | -- If this is a dispatching "=", we must first compare the tags so |
1025 | -- we generate: x.tag = y.tag and then x = y | |
ee6ba406 | 1026 | |
725a69d2 | 1027 | if Subp = Eq_Prim_Op then |
1028 | Param := First_Actual (Call_Node); | |
aad6babd | 1029 | New_Call := |
725a69d2 | 1030 | Make_And_Then (Loc, |
1031 | Left_Opnd => | |
1032 | Make_Op_Eq (Loc, | |
1033 | Left_Opnd => | |
1034 | Make_Selected_Component (Loc, | |
1ea4332a | 1035 | Prefix => New_Value (Param), |
725a69d2 | 1036 | Selector_Name => |
83c6c069 | 1037 | New_Occurrence_Of (First_Tag_Component (Typ), |
725a69d2 | 1038 | Loc)), |
ee6ba406 | 1039 | |
725a69d2 | 1040 | Right_Opnd => |
1041 | Make_Selected_Component (Loc, | |
1ea4332a | 1042 | Prefix => |
725a69d2 | 1043 | Unchecked_Convert_To (Typ, |
1044 | New_Value (Next_Actual (Param))), | |
1045 | Selector_Name => | |
83c6c069 | 1046 | New_Occurrence_Of |
1ea4332a | 1047 | (First_Tag_Component (Typ), Loc))), |
725a69d2 | 1048 | Right_Opnd => New_Call); |
5a44b136 | 1049 | |
1050 | SCIL_Related_Node := Right_Opnd (New_Call); | |
ee6ba406 | 1051 | end if; |
1052 | ||
1053 | else | |
1054 | New_Call := | |
1055 | Make_Procedure_Call_Statement (Loc, | |
1ea4332a | 1056 | Name => New_Call_Name, |
ee6ba406 | 1057 | Parameter_Associations => New_Params); |
1058 | end if; | |
1059 | ||
e00e091c | 1060 | -- Register the dispatching call in the call graph nodes table |
1061 | ||
1062 | Register_CG_Node (Call_Node); | |
1063 | ||
ee6ba406 | 1064 | Rewrite (Call_Node, New_Call); |
725a69d2 | 1065 | |
5a44b136 | 1066 | -- Associate the SCIL node of this dispatching call |
1067 | ||
1068 | if Generate_SCIL then | |
1069 | Set_SCIL_Node (SCIL_Related_Node, SCIL_Node); | |
1070 | end if; | |
1071 | ||
725a69d2 | 1072 | -- Suppress all checks during the analysis of the expanded code |
36b938a3 | 1073 | -- to avoid the generation of spurious warnings under ZFP run-time. |
725a69d2 | 1074 | |
1075 | Analyze_And_Resolve (Call_Node, Call_Typ, Suppress => All_Checks); | |
7189d17f | 1076 | end Expand_Dispatching_Call; |
ee6ba406 | 1077 | |
aad6babd | 1078 | --------------------------------- |
1079 | -- Expand_Interface_Conversion -- | |
1080 | --------------------------------- | |
1081 | ||
61ce7f9f | 1082 | procedure Expand_Interface_Conversion (N : Node_Id) is |
1083 | function Underlying_Record_Type (Typ : Entity_Id) return Entity_Id; | |
1084 | -- Return the underlying record type of Typ. | |
aad6babd | 1085 | |
61ce7f9f | 1086 | ---------------------------- |
1087 | -- Underlying_Record_Type -- | |
1088 | ---------------------------- | |
aad6babd | 1089 | |
61ce7f9f | 1090 | function Underlying_Record_Type (Typ : Entity_Id) return Entity_Id is |
1091 | E : Entity_Id := Typ; | |
aad6babd | 1092 | |
61ce7f9f | 1093 | begin |
1094 | -- Handle access to class-wide interface types | |
aad6babd | 1095 | |
61ce7f9f | 1096 | if Is_Access_Type (E) then |
1097 | E := Etype (Directly_Designated_Type (E)); | |
1098 | end if; | |
aad6babd | 1099 | |
61ce7f9f | 1100 | -- Handle class-wide types. This conversion can appear explicitly in |
1101 | -- the source code. Example: I'Class (Obj) | |
aad6babd | 1102 | |
61ce7f9f | 1103 | if Is_Class_Wide_Type (E) then |
1104 | E := Root_Type (E); | |
1105 | end if; | |
d62940bf | 1106 | |
61ce7f9f | 1107 | -- If the target type is a tagged synchronized type, the dispatch |
1108 | -- table info is in the corresponding record type. | |
79a72728 | 1109 | |
61ce7f9f | 1110 | if Is_Concurrent_Type (E) then |
1111 | E := Corresponding_Record_Type (E); | |
1112 | end if; | |
79a72728 | 1113 | |
61ce7f9f | 1114 | -- Handle private types |
1115 | ||
1116 | E := Underlying_Type (E); | |
23197014 | 1117 | |
61ce7f9f | 1118 | -- Handle subtypes |
23197014 | 1119 | |
61ce7f9f | 1120 | return Base_Type (E); |
1121 | end Underlying_Record_Type; | |
1122 | ||
1123 | -- Local variables | |
1124 | ||
1125 | Loc : constant Source_Ptr := Sloc (N); | |
1126 | Etyp : constant Entity_Id := Etype (N); | |
1127 | Operand : constant Node_Id := Expression (N); | |
1128 | Operand_Typ : Entity_Id := Etype (Operand); | |
1129 | Func : Node_Id; | |
1130 | Iface_Typ : constant Entity_Id := Underlying_Record_Type (Etype (N)); | |
1131 | Iface_Tag : Entity_Id; | |
1132 | Is_Static : Boolean; | |
1133 | ||
1134 | -- Start of processing for Expand_Interface_Conversion | |
1135 | ||
1136 | begin | |
a17cc77d | 1137 | -- Freeze the entity associated with the target interface to have |
1138 | -- available the attribute Access_Disp_Table. | |
1139 | ||
1140 | Freeze_Before (N, Iface_Typ); | |
1141 | ||
61ce7f9f | 1142 | -- Ada 2005 (AI-345): Handle synchronized interface type derivations |
1143 | ||
1144 | if Is_Concurrent_Type (Operand_Typ) then | |
1145 | Operand_Typ := Base_Type (Corresponding_Record_Type (Operand_Typ)); | |
1146 | end if; | |
1147 | ||
1148 | -- Evaluate if we can statically displace the pointer to the object | |
1149 | ||
1150 | declare | |
1151 | Opnd_Typ : constant Node_Id := Underlying_Record_Type (Operand_Typ); | |
1152 | ||
1153 | begin | |
1154 | Is_Static := | |
1155 | not Is_Interface (Opnd_Typ) | |
1156 | and then Interface_Present_In_Ancestor | |
1157 | (Typ => Opnd_Typ, | |
1158 | Iface => Iface_Typ) | |
1159 | and then (Etype (Opnd_Typ) = Opnd_Typ | |
1160 | or else not | |
1161 | Is_Variable_Size_Record (Etype (Opnd_Typ))); | |
1162 | end; | |
aad6babd | 1163 | |
662256db | 1164 | if not Tagged_Type_Expansion then |
79500ea0 | 1165 | if VM_Target /= No_VM then |
1166 | if Is_Access_Type (Operand_Typ) then | |
1167 | Operand_Typ := Designated_Type (Operand_Typ); | |
1168 | end if; | |
725a69d2 | 1169 | |
79500ea0 | 1170 | if Is_Class_Wide_Type (Operand_Typ) then |
1171 | Operand_Typ := Root_Type (Operand_Typ); | |
1172 | end if; | |
1173 | ||
61ce7f9f | 1174 | if not Is_Static and then Operand_Typ /= Iface_Typ then |
79500ea0 | 1175 | Insert_Action (N, |
1176 | Make_Procedure_Call_Statement (Loc, | |
1177 | Name => New_Occurrence_Of | |
1178 | (RTE (RE_Check_Interface_Conversion), Loc), | |
1179 | Parameter_Associations => New_List ( | |
1180 | Make_Attribute_Reference (Loc, | |
61ce7f9f | 1181 | Prefix => Duplicate_Subexpr (Expression (N)), |
79500ea0 | 1182 | Attribute_Name => Name_Tag), |
1183 | Make_Attribute_Reference (Loc, | |
83c6c069 | 1184 | Prefix => New_Occurrence_Of (Iface_Typ, Loc), |
79500ea0 | 1185 | Attribute_Name => Name_Tag)))); |
1186 | end if; | |
1187 | ||
1188 | -- Just do a conversion ??? | |
1189 | ||
1190 | Rewrite (N, Unchecked_Convert_To (Etype (N), N)); | |
1191 | Analyze (N); | |
1192 | end if; | |
725a69d2 | 1193 | |
725a69d2 | 1194 | return; |
1195 | end if; | |
1196 | ||
952af0b9 | 1197 | if not Is_Static then |
68f95949 | 1198 | |
1199 | -- Give error if configurable run time and Displace not available | |
1200 | ||
1201 | if not RTE_Available (RE_Displace) then | |
cc60bd16 | 1202 | Error_Msg_CRT ("dynamic interface conversion", N); |
68f95949 | 1203 | return; |
1204 | end if; | |
1205 | ||
725a69d2 | 1206 | -- Handle conversion of access-to-class-wide interface types. Target |
1207 | -- can be an access to an object or an access to another class-wide | |
1208 | -- interface (see -1- and -2- in the following example): | |
af647dc7 | 1209 | |
1210 | -- type Iface1_Ref is access all Iface1'Class; | |
1211 | -- type Iface2_Ref is access all Iface1'Class; | |
1212 | ||
1213 | -- Acc1 : Iface1_Ref := new ... | |
1214 | -- Obj : Obj_Ref := Obj_Ref (Acc); -- 1 | |
1215 | -- Acc2 : Iface2_Ref := Iface2_Ref (Acc); -- 2 | |
1216 | ||
1217 | if Is_Access_Type (Operand_Typ) then | |
af647dc7 | 1218 | Rewrite (N, |
1219 | Unchecked_Convert_To (Etype (N), | |
1220 | Make_Function_Call (Loc, | |
83c6c069 | 1221 | Name => New_Occurrence_Of (RTE (RE_Displace), Loc), |
af647dc7 | 1222 | Parameter_Associations => New_List ( |
1223 | ||
1224 | Unchecked_Convert_To (RTE (RE_Address), | |
1225 | Relocate_Node (Expression (N))), | |
1226 | ||
1227 | New_Occurrence_Of | |
1228 | (Node (First_Elmt (Access_Disp_Table (Iface_Typ))), | |
1229 | Loc))))); | |
1230 | ||
1231 | Analyze (N); | |
1232 | return; | |
1233 | end if; | |
1234 | ||
952af0b9 | 1235 | Rewrite (N, |
1236 | Make_Function_Call (Loc, | |
83c6c069 | 1237 | Name => New_Occurrence_Of (RTE (RE_Displace), Loc), |
952af0b9 | 1238 | Parameter_Associations => New_List ( |
1239 | Make_Attribute_Reference (Loc, | |
1240 | Prefix => Relocate_Node (Expression (N)), | |
1241 | Attribute_Name => Name_Address), | |
af647dc7 | 1242 | |
952af0b9 | 1243 | New_Occurrence_Of |
1244 | (Node (First_Elmt (Access_Disp_Table (Iface_Typ))), | |
1245 | Loc)))); | |
1246 | ||
1247 | Analyze (N); | |
1248 | ||
af647dc7 | 1249 | -- If the target is a class-wide interface we change the type of the |
1250 | -- data returned by IW_Convert to indicate that this is a dispatching | |
1251 | -- call. | |
952af0b9 | 1252 | |
17e14451 | 1253 | declare |
1254 | New_Itype : Entity_Id; | |
952af0b9 | 1255 | |
17e14451 | 1256 | begin |
1257 | New_Itype := Create_Itype (E_Anonymous_Access_Type, N); | |
cc60bd16 | 1258 | Set_Etype (New_Itype, New_Itype); |
17e14451 | 1259 | Set_Directly_Designated_Type (New_Itype, Etyp); |
952af0b9 | 1260 | |
17e14451 | 1261 | Rewrite (N, |
1262 | Make_Explicit_Dereference (Loc, | |
1263 | Prefix => | |
1264 | Unchecked_Convert_To (New_Itype, Relocate_Node (N)))); | |
1265 | Analyze (N); | |
1266 | Freeze_Itype (New_Itype, N); | |
1267 | ||
1268 | return; | |
1269 | end; | |
952af0b9 | 1270 | end if; |
1271 | ||
d62940bf | 1272 | Iface_Tag := Find_Interface_Tag (Operand_Typ, Iface_Typ); |
aad6babd | 1273 | pragma Assert (Iface_Tag /= Empty); |
1274 | ||
d62940bf | 1275 | -- Keep separate access types to interfaces because one internal |
f235fede | 1276 | -- function is used to handle the null value (see following comments) |
d62940bf | 1277 | |
1278 | if not Is_Access_Type (Etype (N)) then | |
f235fede | 1279 | |
1280 | -- Statically displace the pointer to the object to reference | |
1281 | -- the component containing the secondary dispatch table. | |
1282 | ||
d62940bf | 1283 | Rewrite (N, |
f235fede | 1284 | Convert_Tag_To_Interface (Class_Wide_Type (Iface_Typ), |
d62940bf | 1285 | Make_Selected_Component (Loc, |
1286 | Prefix => Relocate_Node (Expression (N)), | |
f235fede | 1287 | Selector_Name => New_Occurrence_Of (Iface_Tag, Loc)))); |
d62940bf | 1288 | |
1289 | else | |
39a0c1d3 | 1290 | -- Build internal function to handle the case in which the actual is |
1291 | -- null. If the actual is null returns null because no displacement | |
1292 | -- is required; otherwise performs a type conversion that will be | |
1293 | -- expanded in the code that returns the value of the displaced | |
1294 | -- actual. That is: | |
d62940bf | 1295 | |
af647dc7 | 1296 | -- function Func (O : Address) return Iface_Typ is |
17e14451 | 1297 | -- type Op_Typ is access all Operand_Typ; |
1298 | -- Aux : Op_Typ := To_Op_Typ (O); | |
d62940bf | 1299 | -- begin |
af647dc7 | 1300 | -- if O = Null_Address then |
d62940bf | 1301 | -- return null; |
1302 | -- else | |
17e14451 | 1303 | -- return Iface_Typ!(Aux.Iface_Tag'Address); |
d62940bf | 1304 | -- end if; |
1305 | -- end Func; | |
1306 | ||
af647dc7 | 1307 | declare |
17e14451 | 1308 | Desig_Typ : Entity_Id; |
1309 | Fent : Entity_Id; | |
1310 | New_Typ_Decl : Node_Id; | |
17e14451 | 1311 | Stats : List_Id; |
1312 | ||
af647dc7 | 1313 | begin |
1314 | Desig_Typ := Etype (Expression (N)); | |
d62940bf | 1315 | |
af647dc7 | 1316 | if Is_Access_Type (Desig_Typ) then |
865909d3 | 1317 | Desig_Typ := |
1318 | Available_View (Directly_Designated_Type (Desig_Typ)); | |
af647dc7 | 1319 | end if; |
d62940bf | 1320 | |
e7e688dd | 1321 | if Is_Concurrent_Type (Desig_Typ) then |
1322 | Desig_Typ := Base_Type (Corresponding_Record_Type (Desig_Typ)); | |
1323 | end if; | |
1324 | ||
17e14451 | 1325 | New_Typ_Decl := |
1326 | Make_Full_Type_Declaration (Loc, | |
ec97ce79 | 1327 | Defining_Identifier => Make_Temporary (Loc, 'T'), |
17e14451 | 1328 | Type_Definition => |
1329 | Make_Access_To_Object_Definition (Loc, | |
1330 | All_Present => True, | |
1331 | Null_Exclusion_Present => False, | |
1332 | Constant_Present => False, | |
1333 | Subtype_Indication => | |
83c6c069 | 1334 | New_Occurrence_Of (Desig_Typ, Loc))); |
d62940bf | 1335 | |
725a69d2 | 1336 | Stats := New_List ( |
17e14451 | 1337 | Make_Simple_Return_Statement (Loc, |
1338 | Unchecked_Convert_To (Etype (N), | |
1339 | Make_Attribute_Reference (Loc, | |
1340 | Prefix => | |
1341 | Make_Selected_Component (Loc, | |
1342 | Prefix => | |
e7e688dd | 1343 | Unchecked_Convert_To |
1344 | (Defining_Identifier (New_Typ_Decl), | |
1345 | Make_Identifier (Loc, Name_uO)), | |
17e14451 | 1346 | Selector_Name => |
1347 | New_Occurrence_Of (Iface_Tag, Loc)), | |
1348 | Attribute_Name => Name_Address)))); | |
725a69d2 | 1349 | |
17e14451 | 1350 | -- If the type is null-excluding, no need for the null branch. |
1351 | -- Otherwise we need to check for it and return null. | |
1352 | ||
1353 | if not Can_Never_Be_Null (Etype (N)) then | |
1354 | Stats := New_List ( | |
1355 | Make_If_Statement (Loc, | |
1356 | Condition => | |
1357 | Make_Op_Eq (Loc, | |
1358 | Left_Opnd => Make_Identifier (Loc, Name_uO), | |
83c6c069 | 1359 | Right_Opnd => New_Occurrence_Of |
17e14451 | 1360 | (RTE (RE_Null_Address), Loc)), |
1361 | ||
1362 | Then_Statements => New_List ( | |
1363 | Make_Simple_Return_Statement (Loc, | |
1364 | Make_Null (Loc))), | |
1365 | Else_Statements => Stats)); | |
1366 | end if; | |
d62940bf | 1367 | |
ec97ce79 | 1368 | Fent := Make_Temporary (Loc, 'F'); |
17e14451 | 1369 | Func := |
1370 | Make_Subprogram_Body (Loc, | |
1371 | Specification => | |
1372 | Make_Function_Specification (Loc, | |
1373 | Defining_Unit_Name => Fent, | |
d62940bf | 1374 | |
17e14451 | 1375 | Parameter_Specifications => New_List ( |
1376 | Make_Parameter_Specification (Loc, | |
1377 | Defining_Identifier => | |
1378 | Make_Defining_Identifier (Loc, Name_uO), | |
1379 | Parameter_Type => | |
83c6c069 | 1380 | New_Occurrence_Of (RTE (RE_Address), Loc))), |
d62940bf | 1381 | |
17e14451 | 1382 | Result_Definition => |
83c6c069 | 1383 | New_Occurrence_Of (Etype (N), Loc)), |
d62940bf | 1384 | |
e7e688dd | 1385 | Declarations => New_List (New_Typ_Decl), |
d62940bf | 1386 | |
17e14451 | 1387 | Handled_Statement_Sequence => |
1388 | Make_Handled_Sequence_Of_Statements (Loc, Stats)); | |
d62940bf | 1389 | |
17e14451 | 1390 | -- Place function body before the expression containing the |
1391 | -- conversion. We suppress all checks because the body of the | |
1392 | -- internally generated function already takes care of the case | |
1393 | -- in which the actual is null; therefore there is no need to | |
1394 | -- double check that the pointer is not null when the program | |
1395 | -- executes the alternative that performs the type conversion). | |
af647dc7 | 1396 | |
17e14451 | 1397 | Insert_Action (N, Func, Suppress => All_Checks); |
af647dc7 | 1398 | |
17e14451 | 1399 | if Is_Access_Type (Etype (Expression (N))) then |
af647dc7 | 1400 | |
e7e688dd | 1401 | -- Generate: Func (Address!(Expression)) |
af647dc7 | 1402 | |
17e14451 | 1403 | Rewrite (N, |
1404 | Make_Function_Call (Loc, | |
83c6c069 | 1405 | Name => New_Occurrence_Of (Fent, Loc), |
17e14451 | 1406 | Parameter_Associations => New_List ( |
e7e688dd | 1407 | Unchecked_Convert_To (RTE (RE_Address), |
1408 | Relocate_Node (Expression (N)))))); | |
17e14451 | 1409 | |
1410 | else | |
e7e688dd | 1411 | -- Generate: Func (Operand_Typ!(Expression)'Address) |
17e14451 | 1412 | |
1413 | Rewrite (N, | |
1414 | Make_Function_Call (Loc, | |
83c6c069 | 1415 | Name => New_Occurrence_Of (Fent, Loc), |
17e14451 | 1416 | Parameter_Associations => New_List ( |
1417 | Make_Attribute_Reference (Loc, | |
1418 | Prefix => Unchecked_Convert_To (Operand_Typ, | |
1419 | Relocate_Node (Expression (N))), | |
1420 | Attribute_Name => Name_Address)))); | |
1421 | end if; | |
1422 | end; | |
d62940bf | 1423 | end if; |
aad6babd | 1424 | |
1425 | Analyze (N); | |
1426 | end Expand_Interface_Conversion; | |
1427 | ||
1428 | ------------------------------ | |
1429 | -- Expand_Interface_Actuals -- | |
1430 | ------------------------------ | |
1431 | ||
1432 | procedure Expand_Interface_Actuals (Call_Node : Node_Id) is | |
aad6babd | 1433 | Actual : Node_Id; |
d62940bf | 1434 | Actual_Dup : Node_Id; |
aad6babd | 1435 | Actual_Typ : Entity_Id; |
d62940bf | 1436 | Anon : Entity_Id; |
aad6babd | 1437 | Conversion : Node_Id; |
1438 | Formal : Entity_Id; | |
1439 | Formal_Typ : Entity_Id; | |
1440 | Subp : Entity_Id; | |
d62940bf | 1441 | Formal_DDT : Entity_Id; |
1442 | Actual_DDT : Entity_Id; | |
aad6babd | 1443 | |
1444 | begin | |
1445 | -- This subprogram is called directly from the semantics, so we need a | |
1446 | -- check to see whether expansion is active before proceeding. | |
1447 | ||
1448 | if not Expander_Active then | |
1449 | return; | |
1450 | end if; | |
1451 | ||
1452 | -- Call using access to subprogram with explicit dereference | |
1453 | ||
1454 | if Nkind (Name (Call_Node)) = N_Explicit_Dereference then | |
1455 | Subp := Etype (Name (Call_Node)); | |
1456 | ||
4e5db562 | 1457 | -- Call using selected component |
1458 | ||
1459 | elsif Nkind (Name (Call_Node)) = N_Selected_Component then | |
1460 | Subp := Entity (Selector_Name (Name (Call_Node))); | |
1461 | ||
1462 | -- Call using direct name | |
aad6babd | 1463 | |
1464 | else | |
1465 | Subp := Entity (Name (Call_Node)); | |
1466 | end if; | |
1467 | ||
725a69d2 | 1468 | -- Ada 2005 (AI-251): Look for interface type formals to force "this" |
1469 | -- displacement | |
1470 | ||
aad6babd | 1471 | Formal := First_Formal (Subp); |
1472 | Actual := First_Actual (Call_Node); | |
aad6babd | 1473 | while Present (Formal) loop |
725a69d2 | 1474 | Formal_Typ := Etype (Formal); |
d62940bf | 1475 | |
1476 | if Ekind (Formal_Typ) = E_Record_Type_With_Private then | |
1477 | Formal_Typ := Full_View (Formal_Typ); | |
1478 | end if; | |
1479 | ||
1480 | if Is_Access_Type (Formal_Typ) then | |
1481 | Formal_DDT := Directly_Designated_Type (Formal_Typ); | |
1482 | end if; | |
1483 | ||
aad6babd | 1484 | Actual_Typ := Etype (Actual); |
1485 | ||
d62940bf | 1486 | if Is_Access_Type (Actual_Typ) then |
1487 | Actual_DDT := Directly_Designated_Type (Actual_Typ); | |
1488 | end if; | |
1489 | ||
725a69d2 | 1490 | if Is_Interface (Formal_Typ) |
1491 | and then Is_Class_Wide_Type (Formal_Typ) | |
1492 | then | |
d62940bf | 1493 | -- No need to displace the pointer if the type of the actual |
1d00a8ce | 1494 | -- coincides with the type of the formal. |
aad6babd | 1495 | |
725a69d2 | 1496 | if Actual_Typ = Formal_Typ then |
d62940bf | 1497 | null; |
1498 | ||
725a69d2 | 1499 | -- No need to displace the pointer if the interface type is |
1500 | -- a parent of the type of the actual because in this case the | |
1501 | -- interface primitives are located in the primary dispatch table. | |
aad6babd | 1502 | |
cb4af01d | 1503 | elsif Is_Ancestor (Formal_Typ, Actual_Typ, |
1504 | Use_Full_View => True) | |
1505 | then | |
d62940bf | 1506 | null; |
1507 | ||
725a69d2 | 1508 | -- Implicit conversion to the class-wide formal type to force |
1509 | -- the displacement of the pointer. | |
1510 | ||
d62940bf | 1511 | else |
8a8d9086 | 1512 | -- Normally, expansion of actuals for calls to build-in-place |
1513 | -- functions happens as part of Expand_Actuals, but in this | |
1514 | -- case the call will be wrapped in a conversion and soon after | |
1515 | -- expanded further to handle the displacement for a class-wide | |
1516 | -- interface conversion, so if this is a BIP call then we need | |
1517 | -- to handle it now. | |
1518 | ||
1519 | if Ada_Version >= Ada_2005 | |
1520 | and then Is_Build_In_Place_Function_Call (Actual) | |
1521 | then | |
1522 | Make_Build_In_Place_Call_In_Anonymous_Context (Actual); | |
1523 | end if; | |
1524 | ||
d62940bf | 1525 | Conversion := Convert_To (Formal_Typ, Relocate_Node (Actual)); |
725a69d2 | 1526 | Rewrite (Actual, Conversion); |
d62940bf | 1527 | Analyze_And_Resolve (Actual, Formal_Typ); |
1528 | end if; | |
aad6babd | 1529 | |
725a69d2 | 1530 | -- Access to class-wide interface type |
aad6babd | 1531 | |
1532 | elsif Is_Access_Type (Formal_Typ) | |
725a69d2 | 1533 | and then Is_Interface (Formal_DDT) |
1534 | and then Is_Class_Wide_Type (Formal_DDT) | |
aad6babd | 1535 | and then Interface_Present_In_Ancestor |
d62940bf | 1536 | (Typ => Actual_DDT, |
1537 | Iface => Etype (Formal_DDT)) | |
aad6babd | 1538 | then |
725a69d2 | 1539 | -- Handle attributes 'Access and 'Unchecked_Access |
1540 | ||
aad6babd | 1541 | if Nkind (Actual) = N_Attribute_Reference |
1542 | and then | |
1543 | (Attribute_Name (Actual) = Name_Access | |
1544 | or else Attribute_Name (Actual) = Name_Unchecked_Access) | |
1545 | then | |
5e82d8fe | 1546 | -- This case must have been handled by the analysis and |
1547 | -- expansion of 'Access. The only exception is when types | |
1548 | -- match and no further expansion is required. | |
aad6babd | 1549 | |
5e82d8fe | 1550 | pragma Assert (Base_Type (Etype (Prefix (Actual))) |
1551 | = Base_Type (Formal_DDT)); | |
1552 | null; | |
aad6babd | 1553 | |
725a69d2 | 1554 | -- No need to displace the pointer if the type of the actual |
1555 | -- coincides with the type of the formal. | |
d62940bf | 1556 | |
725a69d2 | 1557 | elsif Actual_DDT = Formal_DDT then |
d62940bf | 1558 | null; |
1559 | ||
725a69d2 | 1560 | -- No need to displace the pointer if the interface type is |
1561 | -- a parent of the type of the actual because in this case the | |
1562 | -- interface primitives are located in the primary dispatch table. | |
d62940bf | 1563 | |
cb4af01d | 1564 | elsif Is_Ancestor (Formal_DDT, Actual_DDT, |
1565 | Use_Full_View => True) | |
1566 | then | |
d62940bf | 1567 | null; |
1568 | ||
aad6babd | 1569 | else |
d62940bf | 1570 | Actual_Dup := Relocate_Node (Actual); |
1571 | ||
4aa270d8 | 1572 | if From_Limited_With (Actual_Typ) then |
d62940bf | 1573 | |
1574 | -- If the type of the actual parameter comes from a limited | |
1575 | -- with-clause and the non-limited view is already available | |
9ced80be | 1576 | -- we replace the anonymous access type by a duplicate |
1577 | -- declaration whose designated type is the non-limited view | |
d62940bf | 1578 | |
1579 | if Ekind (Actual_DDT) = E_Incomplete_Type | |
1580 | and then Present (Non_Limited_View (Actual_DDT)) | |
1581 | then | |
1582 | Anon := New_Copy (Actual_Typ); | |
1583 | ||
1584 | if Is_Itype (Anon) then | |
1585 | Set_Scope (Anon, Current_Scope); | |
1586 | end if; | |
1587 | ||
1588 | Set_Directly_Designated_Type (Anon, | |
1589 | Non_Limited_View (Actual_DDT)); | |
1590 | Set_Etype (Actual_Dup, Anon); | |
1591 | ||
1592 | elsif Is_Class_Wide_Type (Actual_DDT) | |
1593 | and then Ekind (Etype (Actual_DDT)) = E_Incomplete_Type | |
1594 | and then Present (Non_Limited_View (Etype (Actual_DDT))) | |
1595 | then | |
1596 | Anon := New_Copy (Actual_Typ); | |
1597 | ||
1598 | if Is_Itype (Anon) then | |
1599 | Set_Scope (Anon, Current_Scope); | |
1600 | end if; | |
1601 | ||
1602 | Set_Directly_Designated_Type (Anon, | |
1603 | New_Copy (Actual_DDT)); | |
1604 | Set_Class_Wide_Type (Directly_Designated_Type (Anon), | |
1605 | New_Copy (Class_Wide_Type (Actual_DDT))); | |
1606 | Set_Etype (Directly_Designated_Type (Anon), | |
1607 | Non_Limited_View (Etype (Actual_DDT))); | |
1608 | Set_Etype ( | |
1609 | Class_Wide_Type (Directly_Designated_Type (Anon)), | |
1610 | Non_Limited_View (Etype (Actual_DDT))); | |
1611 | Set_Etype (Actual_Dup, Anon); | |
1612 | end if; | |
1613 | end if; | |
1614 | ||
1615 | Conversion := Convert_To (Formal_Typ, Actual_Dup); | |
1616 | Rewrite (Actual, Conversion); | |
aad6babd | 1617 | Analyze_And_Resolve (Actual, Formal_Typ); |
1618 | end if; | |
1619 | end if; | |
1620 | ||
1621 | Next_Actual (Actual); | |
1622 | Next_Formal (Formal); | |
1623 | end loop; | |
1624 | end Expand_Interface_Actuals; | |
1625 | ||
1626 | ---------------------------- | |
1627 | -- Expand_Interface_Thunk -- | |
1628 | ---------------------------- | |
1629 | ||
725a69d2 | 1630 | procedure Expand_Interface_Thunk |
17e14451 | 1631 | (Prim : Node_Id; |
1632 | Thunk_Id : out Entity_Id; | |
1633 | Thunk_Code : out Node_Id) | |
aad6babd | 1634 | is |
e8376947 | 1635 | Loc : constant Source_Ptr := Sloc (Prim); |
1636 | Actuals : constant List_Id := New_List; | |
1637 | Decl : constant List_Id := New_List; | |
1638 | Formals : constant List_Id := New_List; | |
1639 | Target : constant Entity_Id := Ultimate_Alias (Prim); | |
725a69d2 | 1640 | |
c6431a40 | 1641 | Decl_1 : Node_Id; |
1642 | Decl_2 : Node_Id; | |
1643 | Expr : Node_Id; | |
1644 | Formal : Node_Id; | |
1645 | Ftyp : Entity_Id; | |
1646 | Iface_Formal : Node_Id; | |
1647 | New_Arg : Node_Id; | |
1648 | Offset_To_Top : Node_Id; | |
1649 | Target_Formal : Entity_Id; | |
aad6babd | 1650 | |
1651 | begin | |
725a69d2 | 1652 | Thunk_Id := Empty; |
1653 | Thunk_Code := Empty; | |
1654 | ||
3f8cf2d2 | 1655 | -- No thunk needed if the primitive has been eliminated |
1656 | ||
1657 | if Is_Eliminated (Ultimate_Alias (Prim)) then | |
1658 | return; | |
1659 | ||
e8376947 | 1660 | -- In case of primitives that are functions without formals and a |
1661 | -- controlling result there is no need to build the thunk. | |
725a69d2 | 1662 | |
3f8cf2d2 | 1663 | elsif not Present (First_Formal (Target)) then |
725a69d2 | 1664 | pragma Assert (Ekind (Target) = E_Function |
1665 | and then Has_Controlling_Result (Target)); | |
1666 | return; | |
1667 | end if; | |
1668 | ||
04c6d723 | 1669 | -- Duplicate the formals of the Target primitive. In the thunk, the type |
1670 | -- of the controlling formal is the covered interface type (instead of | |
1671 | -- the target tagged type). Done to avoid problems with discriminated | |
1672 | -- tagged types because, if the controlling type has discriminants with | |
e8376947 | 1673 | -- default values, then the type conversions done inside the body of |
1674 | -- the thunk (after the displacement of the pointer to the base of the | |
04c6d723 | 1675 | -- actual object) generate code that modify its contents. |
1676 | ||
1677 | -- Note: This special management is not done for predefined primitives | |
1678 | -- because??? | |
1679 | ||
1680 | if not Is_Predefined_Dispatching_Operation (Prim) then | |
1681 | Iface_Formal := First_Formal (Interface_Alias (Prim)); | |
1682 | end if; | |
aad6babd | 1683 | |
d62940bf | 1684 | Formal := First_Formal (Target); |
aad6babd | 1685 | while Present (Formal) loop |
04c6d723 | 1686 | Ftyp := Etype (Formal); |
1687 | ||
1688 | -- Use the interface type as the type of the controlling formal (see | |
e8376947 | 1689 | -- comment above). |
04c6d723 | 1690 | |
1691 | if not Is_Controlling_Formal (Formal) | |
1692 | or else Is_Predefined_Dispatching_Operation (Prim) | |
1693 | then | |
1694 | Ftyp := Etype (Formal); | |
1695 | Expr := New_Copy_Tree (Expression (Parent (Formal))); | |
1696 | else | |
1697 | Ftyp := Etype (Iface_Formal); | |
1698 | Expr := Empty; | |
1699 | end if; | |
1700 | ||
725a69d2 | 1701 | Append_To (Formals, |
1702 | Make_Parameter_Specification (Loc, | |
1703 | Defining_Identifier => | |
1704 | Make_Defining_Identifier (Sloc (Formal), | |
1705 | Chars => Chars (Formal)), | |
1706 | In_Present => In_Present (Parent (Formal)), | |
1707 | Out_Present => Out_Present (Parent (Formal)), | |
83c6c069 | 1708 | Parameter_Type => New_Occurrence_Of (Ftyp, Loc), |
04c6d723 | 1709 | Expression => Expr)); |
1710 | ||
1711 | if not Is_Predefined_Dispatching_Operation (Prim) then | |
1712 | Next_Formal (Iface_Formal); | |
1713 | end if; | |
d62940bf | 1714 | |
aad6babd | 1715 | Next_Formal (Formal); |
1716 | end loop; | |
1717 | ||
725a69d2 | 1718 | Target_Formal := First_Formal (Target); |
1719 | Formal := First (Formals); | |
1720 | while Present (Formal) loop | |
04c6d723 | 1721 | |
6cd460aa | 1722 | -- If the parent is a constrained discriminated type, then the |
1723 | -- primitive operation will have been defined on a first subtype. | |
1724 | -- For proper matching with controlling type, use base type. | |
04c6d723 | 1725 | |
1726 | if Ekind (Target_Formal) = E_In_Parameter | |
1727 | and then Ekind (Etype (Target_Formal)) = E_Anonymous_Access_Type | |
1728 | then | |
6cd460aa | 1729 | Ftyp := |
1730 | Base_Type (Directly_Designated_Type (Etype (Target_Formal))); | |
04c6d723 | 1731 | else |
ca12fde2 | 1732 | Ftyp := Base_Type (Etype (Target_Formal)); |
04c6d723 | 1733 | end if; |
1734 | ||
232a63ed | 1735 | -- For concurrent types, the relevant information is found in the |
1736 | -- Corresponding_Record_Type, rather than the type entity itself. | |
6cd460aa | 1737 | |
04c6d723 | 1738 | if Is_Concurrent_Type (Ftyp) then |
1739 | Ftyp := Corresponding_Record_Type (Ftyp); | |
1740 | end if; | |
1741 | ||
725a69d2 | 1742 | if Ekind (Target_Formal) = E_In_Parameter |
1743 | and then Ekind (Etype (Target_Formal)) = E_Anonymous_Access_Type | |
40cdae8b | 1744 | and then Is_Controlling_Formal (Target_Formal) |
725a69d2 | 1745 | then |
1746 | -- Generate: | |
17e14451 | 1747 | -- type T is access all <<type of the target formal>> |
1748 | -- S : Storage_Offset := Storage_Offset!(Formal) | |
1749 | -- - Offset_To_Top (address!(Formal)) | |
725a69d2 | 1750 | |
1751 | Decl_2 := | |
1752 | Make_Full_Type_Declaration (Loc, | |
ec97ce79 | 1753 | Defining_Identifier => Make_Temporary (Loc, 'T'), |
725a69d2 | 1754 | Type_Definition => |
1755 | Make_Access_To_Object_Definition (Loc, | |
1756 | All_Present => True, | |
1757 | Null_Exclusion_Present => False, | |
1758 | Constant_Present => False, | |
1759 | Subtype_Indication => | |
83c6c069 | 1760 | New_Occurrence_Of (Ftyp, Loc))); |
725a69d2 | 1761 | |
cc60bd16 | 1762 | New_Arg := |
1763 | Unchecked_Convert_To (RTE (RE_Address), | |
83c6c069 | 1764 | New_Occurrence_Of (Defining_Identifier (Formal), Loc)); |
cc60bd16 | 1765 | |
1766 | if not RTE_Available (RE_Offset_To_Top) then | |
1767 | Offset_To_Top := | |
1768 | Build_Offset_To_Top (Loc, New_Arg); | |
1769 | else | |
1770 | Offset_To_Top := | |
1771 | Make_Function_Call (Loc, | |
83c6c069 | 1772 | Name => New_Occurrence_Of (RTE (RE_Offset_To_Top), Loc), |
cc60bd16 | 1773 | Parameter_Associations => New_List (New_Arg)); |
1774 | end if; | |
1775 | ||
725a69d2 | 1776 | Decl_1 := |
1777 | Make_Object_Declaration (Loc, | |
ec97ce79 | 1778 | Defining_Identifier => Make_Temporary (Loc, 'S'), |
725a69d2 | 1779 | Constant_Present => True, |
1780 | Object_Definition => | |
83c6c069 | 1781 | New_Occurrence_Of (RTE (RE_Storage_Offset), Loc), |
725a69d2 | 1782 | Expression => |
1783 | Make_Op_Subtract (Loc, | |
1784 | Left_Opnd => | |
1785 | Unchecked_Convert_To | |
1786 | (RTE (RE_Storage_Offset), | |
83c6c069 | 1787 | New_Occurrence_Of |
1788 | (Defining_Identifier (Formal), Loc)), | |
725a69d2 | 1789 | Right_Opnd => |
cc60bd16 | 1790 | Offset_To_Top)); |
725a69d2 | 1791 | |
1792 | Append_To (Decl, Decl_2); | |
1793 | Append_To (Decl, Decl_1); | |
1794 | ||
17e14451 | 1795 | -- Reference the new actual. Generate: |
1796 | -- T!(S) | |
725a69d2 | 1797 | |
1798 | Append_To (Actuals, | |
1799 | Unchecked_Convert_To | |
1800 | (Defining_Identifier (Decl_2), | |
83c6c069 | 1801 | New_Occurrence_Of (Defining_Identifier (Decl_1), Loc))); |
725a69d2 | 1802 | |
40cdae8b | 1803 | elsif Is_Controlling_Formal (Target_Formal) then |
aad6babd | 1804 | |
e8376947 | 1805 | -- Generate: |
17e14451 | 1806 | -- S1 : Storage_Offset := Storage_Offset!(Formal'Address) |
1807 | -- - Offset_To_Top (Formal'Address) | |
1808 | -- S2 : Addr_Ptr := Addr_Ptr!(S1) | |
aad6babd | 1809 | |
cc60bd16 | 1810 | New_Arg := |
1811 | Make_Attribute_Reference (Loc, | |
1812 | Prefix => | |
83c6c069 | 1813 | New_Occurrence_Of (Defining_Identifier (Formal), Loc), |
cc60bd16 | 1814 | Attribute_Name => |
1815 | Name_Address); | |
1816 | ||
1817 | if not RTE_Available (RE_Offset_To_Top) then | |
1818 | Offset_To_Top := | |
1819 | Build_Offset_To_Top (Loc, New_Arg); | |
1820 | else | |
1821 | Offset_To_Top := | |
1822 | Make_Function_Call (Loc, | |
83c6c069 | 1823 | Name => New_Occurrence_Of (RTE (RE_Offset_To_Top), Loc), |
cc60bd16 | 1824 | Parameter_Associations => New_List (New_Arg)); |
1825 | end if; | |
1826 | ||
725a69d2 | 1827 | Decl_1 := |
1828 | Make_Object_Declaration (Loc, | |
ec97ce79 | 1829 | Defining_Identifier => Make_Temporary (Loc, 'S'), |
725a69d2 | 1830 | Constant_Present => True, |
1831 | Object_Definition => | |
83c6c069 | 1832 | New_Occurrence_Of (RTE (RE_Storage_Offset), Loc), |
725a69d2 | 1833 | Expression => |
1834 | Make_Op_Subtract (Loc, | |
1835 | Left_Opnd => | |
1836 | Unchecked_Convert_To | |
1837 | (RTE (RE_Storage_Offset), | |
1838 | Make_Attribute_Reference (Loc, | |
1839 | Prefix => | |
83c6c069 | 1840 | New_Occurrence_Of |
725a69d2 | 1841 | (Defining_Identifier (Formal), Loc), |
1842 | Attribute_Name => Name_Address)), | |
1843 | Right_Opnd => | |
cc60bd16 | 1844 | Offset_To_Top)); |
aad6babd | 1845 | |
725a69d2 | 1846 | Decl_2 := |
1847 | Make_Object_Declaration (Loc, | |
ec97ce79 | 1848 | Defining_Identifier => Make_Temporary (Loc, 'S'), |
1849 | Constant_Present => True, | |
1850 | Object_Definition => | |
83c6c069 | 1851 | New_Occurrence_Of (RTE (RE_Addr_Ptr), Loc), |
ec97ce79 | 1852 | Expression => |
725a69d2 | 1853 | Unchecked_Convert_To |
1854 | (RTE (RE_Addr_Ptr), | |
83c6c069 | 1855 | New_Occurrence_Of (Defining_Identifier (Decl_1), Loc))); |
aad6babd | 1856 | |
725a69d2 | 1857 | Append_To (Decl, Decl_1); |
1858 | Append_To (Decl, Decl_2); | |
952af0b9 | 1859 | |
ec97ce79 | 1860 | -- Reference the new actual, generate: |
17e14451 | 1861 | -- Target_Formal (S2.all) |
aad6babd | 1862 | |
725a69d2 | 1863 | Append_To (Actuals, |
04c6d723 | 1864 | Unchecked_Convert_To (Ftyp, |
725a69d2 | 1865 | Make_Explicit_Dereference (Loc, |
83c6c069 | 1866 | New_Occurrence_Of (Defining_Identifier (Decl_2), Loc)))); |
aad6babd | 1867 | |
984d005d | 1868 | -- Ensure proper matching of access types. Required to avoid |
1869 | -- reporting spurious errors. | |
1870 | ||
1871 | elsif Is_Access_Type (Etype (Target_Formal)) then | |
1872 | Append_To (Actuals, | |
1873 | Unchecked_Convert_To (Base_Type (Etype (Target_Formal)), | |
83c6c069 | 1874 | New_Occurrence_Of (Defining_Identifier (Formal), Loc))); |
984d005d | 1875 | |
725a69d2 | 1876 | -- No special management required for this actual |
aad6babd | 1877 | |
725a69d2 | 1878 | else |
1879 | Append_To (Actuals, | |
83c6c069 | 1880 | New_Occurrence_Of (Defining_Identifier (Formal), Loc)); |
725a69d2 | 1881 | end if; |
1882 | ||
1883 | Next_Formal (Target_Formal); | |
aad6babd | 1884 | Next (Formal); |
1885 | end loop; | |
1886 | ||
ec97ce79 | 1887 | Thunk_Id := Make_Temporary (Loc, 'T'); |
b1961352 | 1888 | Set_Ekind (Thunk_Id, Ekind (Prim)); |
e7e688dd | 1889 | Set_Is_Thunk (Thunk_Id); |
265200d0 | 1890 | Set_Convention (Thunk_Id, Convention (Prim)); |
cdc5a761 | 1891 | Set_Thunk_Entity (Thunk_Id, Target); |
e7e688dd | 1892 | |
e8376947 | 1893 | -- Procedure case |
1894 | ||
d62940bf | 1895 | if Ekind (Target) = E_Procedure then |
725a69d2 | 1896 | Thunk_Code := |
aad6babd | 1897 | Make_Subprogram_Body (Loc, |
1898 | Specification => | |
1899 | Make_Procedure_Specification (Loc, | |
1900 | Defining_Unit_Name => Thunk_Id, | |
1901 | Parameter_Specifications => Formals), | |
1902 | Declarations => Decl, | |
1903 | Handled_Statement_Sequence => | |
1904 | Make_Handled_Sequence_Of_Statements (Loc, | |
1905 | Statements => New_List ( | |
1906 | Make_Procedure_Call_Statement (Loc, | |
725a69d2 | 1907 | Name => New_Occurrence_Of (Target, Loc), |
1908 | Parameter_Associations => Actuals)))); | |
aad6babd | 1909 | |
e8376947 | 1910 | -- Function case |
aad6babd | 1911 | |
e8376947 | 1912 | else pragma Assert (Ekind (Target) = E_Function); |
61ce7f9f | 1913 | declare |
1914 | Result_Def : Node_Id; | |
1915 | Call_Node : Node_Id; | |
1916 | ||
1917 | begin | |
1918 | Call_Node := | |
1919 | Make_Function_Call (Loc, | |
1920 | Name => New_Occurrence_Of (Target, Loc), | |
1921 | Parameter_Associations => Actuals); | |
1922 | ||
1923 | if not Is_Interface (Etype (Prim)) then | |
1924 | Result_Def := New_Copy (Result_Definition (Parent (Target))); | |
1925 | ||
1926 | -- Thunk of function returning a class-wide interface object. No | |
1927 | -- extra displacement needed since the displacement is generated | |
1928 | -- in the return statement of Prim. Example: | |
1929 | ||
1930 | -- type Iface is interface ... | |
1931 | -- function F (O : Iface) return Iface'Class; | |
1932 | ||
1933 | -- type T is new ... and Iface with ... | |
1934 | -- function F (O : T) return Iface'Class; | |
1935 | ||
1936 | elsif Is_Class_Wide_Type (Etype (Prim)) then | |
1937 | Result_Def := New_Occurrence_Of (Etype (Prim), Loc); | |
1938 | ||
1939 | -- Thunk of function returning an interface object. Displacement | |
1940 | -- needed. Example: | |
1941 | ||
1942 | -- type Iface is interface ... | |
1943 | -- function F (O : Iface) return Iface; | |
1944 | ||
1945 | -- type T is new ... and Iface with ... | |
1946 | -- function F (O : T) return T; | |
1947 | ||
1948 | else | |
1949 | Result_Def := | |
1950 | New_Occurrence_Of (Class_Wide_Type (Etype (Prim)), Loc); | |
1951 | ||
1952 | -- Adding implicit conversion to force the displacement of | |
1953 | -- the pointer to the object to reference the corresponding | |
1954 | -- secondary dispatch table. | |
1955 | ||
1956 | Call_Node := | |
1957 | Make_Type_Conversion (Loc, | |
1958 | Subtype_Mark => | |
1959 | New_Occurrence_Of (Class_Wide_Type (Etype (Prim)), Loc), | |
1960 | Expression => Relocate_Node (Call_Node)); | |
1961 | end if; | |
1962 | ||
1963 | Thunk_Code := | |
1964 | Make_Subprogram_Body (Loc, | |
1965 | Specification => | |
1966 | Make_Function_Specification (Loc, | |
1967 | Defining_Unit_Name => Thunk_Id, | |
1968 | Parameter_Specifications => Formals, | |
1969 | Result_Definition => Result_Def), | |
1970 | Declarations => Decl, | |
1971 | Handled_Statement_Sequence => | |
1972 | Make_Handled_Sequence_Of_Statements (Loc, | |
1973 | Statements => New_List ( | |
1974 | Make_Simple_Return_Statement (Loc, Call_Node)))); | |
1975 | end; | |
aad6babd | 1976 | end if; |
aad6babd | 1977 | end Expand_Interface_Thunk; |
1978 | ||
bb5dfacc | 1979 | ------------------------ |
1980 | -- Find_Specific_Type -- | |
1981 | ------------------------ | |
1982 | ||
1983 | function Find_Specific_Type (CW : Entity_Id) return Entity_Id is | |
1984 | Typ : Entity_Id := Root_Type (CW); | |
1985 | ||
1986 | begin | |
1987 | if Ekind (Typ) = E_Incomplete_Type then | |
4aa270d8 | 1988 | if From_Limited_With (Typ) then |
bb5dfacc | 1989 | Typ := Non_Limited_View (Typ); |
1990 | else | |
1991 | Typ := Full_View (Typ); | |
1992 | end if; | |
1993 | end if; | |
1994 | ||
1995 | return Typ; | |
1996 | end Find_Specific_Type; | |
1997 | ||
d00681a7 | 1998 | -------------------------- |
1999 | -- Has_CPP_Constructors -- | |
2000 | -------------------------- | |
2001 | ||
2002 | function Has_CPP_Constructors (Typ : Entity_Id) return Boolean is | |
2003 | E : Entity_Id; | |
2004 | ||
2005 | begin | |
2006 | -- Look for the constructor entities | |
2007 | ||
2008 | E := Next_Entity (Typ); | |
2009 | while Present (E) loop | |
2010 | if Ekind (E) = E_Function | |
2011 | and then Is_Constructor (E) | |
2012 | then | |
2013 | return True; | |
2014 | end if; | |
2015 | ||
2016 | Next_Entity (E); | |
2017 | end loop; | |
2018 | ||
2019 | return False; | |
2020 | end Has_CPP_Constructors; | |
2021 | ||
24971415 | 2022 | ------------ |
2023 | -- Has_DT -- | |
2024 | ------------ | |
2025 | ||
2026 | function Has_DT (Typ : Entity_Id) return Boolean is | |
2027 | begin | |
2028 | return not Is_Interface (Typ) | |
2029 | and then not Restriction_Active (No_Dispatching_Calls); | |
2030 | end Has_DT; | |
2031 | ||
687b5687 | 2032 | ---------------------------------- |
2033 | -- Is_Expanded_Dispatching_Call -- | |
2034 | ---------------------------------- | |
2035 | ||
2036 | function Is_Expanded_Dispatching_Call (N : Node_Id) return Boolean is | |
2037 | begin | |
2038 | return Nkind (N) in N_Subprogram_Call | |
2039 | and then Nkind (Name (N)) = N_Explicit_Dereference | |
2040 | and then Is_Dispatch_Table_Entity (Etype (Name (N))); | |
2041 | end Is_Expanded_Dispatching_Call; | |
2042 | ||
a652dd51 | 2043 | ----------------------------------------- |
2044 | -- Is_Predefined_Dispatching_Operation -- | |
2045 | ----------------------------------------- | |
2046 | ||
2047 | function Is_Predefined_Dispatching_Operation | |
2048 | (E : Entity_Id) return Boolean | |
2049 | is | |
2050 | TSS_Name : TSS_Name_Type; | |
2051 | ||
2052 | begin | |
2053 | if not Is_Dispatching_Operation (E) then | |
2054 | return False; | |
2055 | end if; | |
2056 | ||
2057 | Get_Name_String (Chars (E)); | |
2058 | ||
2059 | -- Most predefined primitives have internally generated names. Equality | |
2060 | -- must be treated differently; the predefined operation is recognized | |
2061 | -- as a homogeneous binary operator that returns Boolean. | |
2062 | ||
2063 | if Name_Len > TSS_Name_Type'Last then | |
2064 | TSS_Name := TSS_Name_Type (Name_Buffer (Name_Len - TSS_Name'Length + 1 | |
2065 | .. Name_Len)); | |
2066 | if Chars (E) = Name_uSize | |
a652dd51 | 2067 | or else TSS_Name = TSS_Stream_Read |
2068 | or else TSS_Name = TSS_Stream_Write | |
2069 | or else TSS_Name = TSS_Stream_Input | |
2070 | or else TSS_Name = TSS_Stream_Output | |
2071 | or else | |
2072 | (Chars (E) = Name_Op_Eq | |
30592778 | 2073 | and then Etype (First_Formal (E)) = Etype (Last_Formal (E))) |
a652dd51 | 2074 | or else Chars (E) = Name_uAssign |
2075 | or else TSS_Name = TSS_Deep_Adjust | |
2076 | or else TSS_Name = TSS_Deep_Finalize | |
2077 | or else Is_Predefined_Interface_Primitive (E) | |
2078 | then | |
2079 | return True; | |
2080 | end if; | |
2081 | end if; | |
2082 | ||
2083 | return False; | |
2084 | end Is_Predefined_Dispatching_Operation; | |
2085 | ||
d1458a07 | 2086 | --------------------------------------- |
2087 | -- Is_Predefined_Internal_Operation -- | |
2088 | --------------------------------------- | |
2089 | ||
2090 | function Is_Predefined_Internal_Operation | |
2091 | (E : Entity_Id) return Boolean | |
2092 | is | |
2093 | TSS_Name : TSS_Name_Type; | |
2094 | ||
2095 | begin | |
2096 | if not Is_Dispatching_Operation (E) then | |
2097 | return False; | |
2098 | end if; | |
2099 | ||
2100 | Get_Name_String (Chars (E)); | |
2101 | ||
2102 | -- Most predefined primitives have internally generated names. Equality | |
2103 | -- must be treated differently; the predefined operation is recognized | |
2104 | -- as a homogeneous binary operator that returns Boolean. | |
2105 | ||
2106 | if Name_Len > TSS_Name_Type'Last then | |
2107 | TSS_Name := | |
2108 | TSS_Name_Type | |
2109 | (Name_Buffer (Name_Len - TSS_Name'Length + 1 .. Name_Len)); | |
2110 | ||
18393965 | 2111 | if Nam_In (Chars (E), Name_uSize, Name_uAssign) |
d1458a07 | 2112 | or else |
2113 | (Chars (E) = Name_Op_Eq | |
18393965 | 2114 | and then Etype (First_Formal (E)) = Etype (Last_Formal (E))) |
d1458a07 | 2115 | or else TSS_Name = TSS_Deep_Adjust |
2116 | or else TSS_Name = TSS_Deep_Finalize | |
2117 | or else Is_Predefined_Interface_Primitive (E) | |
2118 | then | |
2119 | return True; | |
2120 | end if; | |
2121 | end if; | |
2122 | ||
2123 | return False; | |
2124 | end Is_Predefined_Internal_Operation; | |
2125 | ||
af647dc7 | 2126 | ------------------------------------- |
2127 | -- Is_Predefined_Dispatching_Alias -- | |
2128 | ------------------------------------- | |
2129 | ||
2130 | function Is_Predefined_Dispatching_Alias (Prim : Entity_Id) return Boolean | |
2131 | is | |
af647dc7 | 2132 | begin |
fc2907f6 | 2133 | return not Is_Predefined_Dispatching_Operation (Prim) |
af647dc7 | 2134 | and then Present (Alias (Prim)) |
fc2907f6 | 2135 | and then Is_Predefined_Dispatching_Operation (Ultimate_Alias (Prim)); |
af647dc7 | 2136 | end Is_Predefined_Dispatching_Alias; |
2137 | ||
a652dd51 | 2138 | --------------------------------------- |
2139 | -- Is_Predefined_Interface_Primitive -- | |
2140 | --------------------------------------- | |
2141 | ||
2142 | function Is_Predefined_Interface_Primitive (E : Entity_Id) return Boolean is | |
2143 | begin | |
6cb4b973 | 2144 | -- In VM targets we don't restrict the functionality of this test to |
2145 | -- compiling in Ada 2005 mode since in VM targets any tagged type has | |
2146 | -- these primitives | |
2147 | ||
2148 | return (Ada_Version >= Ada_2005 or else not Tagged_Type_Expansion) | |
a652dd51 | 2149 | and then (Chars (E) = Name_uDisp_Asynchronous_Select or else |
2150 | Chars (E) = Name_uDisp_Conditional_Select or else | |
2151 | Chars (E) = Name_uDisp_Get_Prim_Op_Kind or else | |
2152 | Chars (E) = Name_uDisp_Get_Task_Id or else | |
2153 | Chars (E) = Name_uDisp_Requeue or else | |
2154 | Chars (E) = Name_uDisp_Timed_Select); | |
2155 | end Is_Predefined_Interface_Primitive; | |
2156 | ||
76a1c25b | 2157 | ---------------------------------------- |
2158 | -- Make_Disp_Asynchronous_Select_Body -- | |
2159 | ---------------------------------------- | |
ee6ba406 | 2160 | |
cdb1c38f | 2161 | -- For interface types, generate: |
2162 | ||
2163 | -- procedure _Disp_Asynchronous_Select | |
2164 | -- (T : in out <Typ>; | |
2165 | -- S : Integer; | |
2166 | -- P : System.Address; | |
2167 | -- B : out System.Storage_Elements.Dummy_Communication_Block; | |
2168 | -- F : out Boolean) | |
2169 | -- is | |
2170 | -- begin | |
a053db0d | 2171 | -- F := False; |
2172 | -- C := Ada.Tags.POK_Function; | |
cdb1c38f | 2173 | -- end _Disp_Asynchronous_Select; |
2174 | ||
2175 | -- For protected types, generate: | |
2176 | ||
2177 | -- procedure _Disp_Asynchronous_Select | |
2178 | -- (T : in out <Typ>; | |
2179 | -- S : Integer; | |
2180 | -- P : System.Address; | |
2181 | -- B : out System.Storage_Elements.Dummy_Communication_Block; | |
2182 | -- F : out Boolean) | |
2183 | -- is | |
2184 | -- I : Integer := | |
2185 | -- Ada.Tags.Get_Entry_Index (Ada.Tags.Tag (<Typ>VP, S)); | |
2186 | -- Bnn : System.Tasking.Protected_Objects.Operations. | |
2187 | -- Communication_Block; | |
2188 | -- begin | |
2189 | -- System.Tasking.Protected_Objects.Operations.Protected_Entry_Call | |
2190 | -- (T._object'Access, | |
2191 | -- System.Tasking.Protected_Objects.Protected_Entry_Index (I), | |
2192 | -- P, | |
2193 | -- System.Tasking.Asynchronous_Call, | |
2194 | -- Bnn); | |
2195 | -- B := System.Storage_Elements.Dummy_Communication_Block (Bnn); | |
2196 | -- end _Disp_Asynchronous_Select; | |
2197 | ||
2198 | -- For task types, generate: | |
2199 | ||
2200 | -- procedure _Disp_Asynchronous_Select | |
2201 | -- (T : in out <Typ>; | |
2202 | -- S : Integer; | |
2203 | -- P : System.Address; | |
2204 | -- B : out System.Storage_Elements.Dummy_Communication_Block; | |
2205 | -- F : out Boolean) | |
2206 | -- is | |
2207 | -- I : Integer := | |
2208 | -- Ada.Tags.Get_Entry_Index (Ada.Tags.Tag (<Typ>VP, S)); | |
2209 | -- begin | |
2210 | -- System.Tasking.Rendezvous.Task_Entry_Call | |
2211 | -- (T._task_id, | |
2212 | -- System.Tasking.Task_Entry_Index (I), | |
2213 | -- P, | |
2214 | -- System.Tasking.Asynchronous_Call, | |
2215 | -- F); | |
2216 | -- end _Disp_Asynchronous_Select; | |
2217 | ||
76a1c25b | 2218 | function Make_Disp_Asynchronous_Select_Body |
2219 | (Typ : Entity_Id) return Node_Id | |
2220 | is | |
725a69d2 | 2221 | Com_Block : Entity_Id; |
2222 | Conc_Typ : Entity_Id := Empty; | |
2223 | Decls : constant List_Id := New_List; | |
725a69d2 | 2224 | Loc : constant Source_Ptr := Sloc (Typ); |
acf97c11 | 2225 | Obj_Ref : Node_Id; |
725a69d2 | 2226 | Stmts : constant List_Id := New_List; |
bf7f5966 | 2227 | Tag_Node : Node_Id; |
ee6ba406 | 2228 | |
2229 | begin | |
68f95949 | 2230 | pragma Assert (not Restriction_Active (No_Dispatching_Calls)); |
2231 | ||
952af0b9 | 2232 | -- Null body is generated for interface types |
2233 | ||
76a1c25b | 2234 | if Is_Interface (Typ) then |
2235 | return | |
2236 | Make_Subprogram_Body (Loc, | |
aabafdc2 | 2237 | Specification => Make_Disp_Asynchronous_Select_Spec (Typ), |
2238 | Declarations => New_List, | |
76a1c25b | 2239 | Handled_Statement_Sequence => |
2240 | Make_Handled_Sequence_Of_Statements (Loc, | |
a053db0d | 2241 | New_List (Make_Assignment_Statement (Loc, |
aabafdc2 | 2242 | Name => Make_Identifier (Loc, Name_uF), |
83c6c069 | 2243 | Expression => New_Occurrence_Of (Standard_False, Loc))))); |
9dfe12ae | 2244 | end if; |
2245 | ||
952af0b9 | 2246 | if Is_Concurrent_Record_Type (Typ) then |
2247 | Conc_Typ := Corresponding_Concurrent_Type (Typ); | |
aad6babd | 2248 | |
76a1c25b | 2249 | -- Generate: |
cdb1c38f | 2250 | -- I : Integer := |
2251 | -- Ada.Tags.Get_Entry_Index (Ada.Tags.Tag! (<type>VP), S); | |
aad6babd | 2252 | |
76a1c25b | 2253 | -- where I will be used to capture the entry index of the primitive |
2254 | -- wrapper at position S. | |
aad6babd | 2255 | |
bf7f5966 | 2256 | if Tagged_Type_Expansion then |
2257 | Tag_Node := | |
2258 | Unchecked_Convert_To (RTE (RE_Tag), | |
83c6c069 | 2259 | New_Occurrence_Of |
bf7f5966 | 2260 | (Node (First_Elmt (Access_Disp_Table (Typ))), Loc)); |
2261 | else | |
2262 | Tag_Node := | |
2263 | Make_Attribute_Reference (Loc, | |
83c6c069 | 2264 | Prefix => New_Occurrence_Of (Typ, Loc), |
bf7f5966 | 2265 | Attribute_Name => Name_Tag); |
2266 | end if; | |
2267 | ||
76a1c25b | 2268 | Append_To (Decls, |
2269 | Make_Object_Declaration (Loc, | |
2270 | Defining_Identifier => | |
2271 | Make_Defining_Identifier (Loc, Name_uI), | |
2272 | Object_Definition => | |
83c6c069 | 2273 | New_Occurrence_Of (Standard_Integer, Loc), |
76a1c25b | 2274 | Expression => |
725a69d2 | 2275 | Make_Function_Call (Loc, |
cdb1c38f | 2276 | Name => |
83c6c069 | 2277 | New_Occurrence_Of (RTE (RE_Get_Entry_Index), Loc), |
cdb1c38f | 2278 | Parameter_Associations => |
2279 | New_List ( | |
bf7f5966 | 2280 | Tag_Node, |
cdb1c38f | 2281 | Make_Identifier (Loc, Name_uS))))); |
aad6babd | 2282 | |
76a1c25b | 2283 | if Ekind (Conc_Typ) = E_Protected_Type then |
aad6babd | 2284 | |
725a69d2 | 2285 | -- Generate: |
cdb1c38f | 2286 | -- Bnn : Communication_Block; |
725a69d2 | 2287 | |
ec97ce79 | 2288 | Com_Block := Make_Temporary (Loc, 'B'); |
725a69d2 | 2289 | Append_To (Decls, |
2290 | Make_Object_Declaration (Loc, | |
2291 | Defining_Identifier => | |
2292 | Com_Block, | |
2293 | Object_Definition => | |
83c6c069 | 2294 | New_Occurrence_Of (RTE (RE_Communication_Block), Loc))); |
725a69d2 | 2295 | |
acf97c11 | 2296 | -- Build T._object'Access for calls below |
aad6babd | 2297 | |
acf97c11 | 2298 | Obj_Ref := |
2299 | Make_Attribute_Reference (Loc, | |
2300 | Attribute_Name => Name_Unchecked_Access, | |
2301 | Prefix => | |
2302 | Make_Selected_Component (Loc, | |
2303 | Prefix => Make_Identifier (Loc, Name_uT), | |
2304 | Selector_Name => Make_Identifier (Loc, Name_uObject))); | |
aad6babd | 2305 | |
acf97c11 | 2306 | case Corresponding_Runtime_Package (Conc_Typ) is |
2307 | when System_Tasking_Protected_Objects_Entries => | |
aad6babd | 2308 | |
acf97c11 | 2309 | -- Generate: |
2310 | -- Protected_Entry_Call | |
2311 | -- (T._object'Access, -- Object | |
2312 | -- Protected_Entry_Index! (I), -- E | |
2313 | -- P, -- Uninterpreted_Data | |
2314 | -- Asynchronous_Call, -- Mode | |
2315 | -- Bnn); -- Communication_Block | |
2316 | ||
2317 | -- where T is the protected object, I is the entry index, P | |
2318 | -- is the wrapped parameters and B is the name of the | |
2319 | -- communication block. | |
2320 | ||
2321 | Append_To (Stmts, | |
2322 | Make_Procedure_Call_Statement (Loc, | |
2323 | Name => | |
83c6c069 | 2324 | New_Occurrence_Of (RTE (RE_Protected_Entry_Call), Loc), |
acf97c11 | 2325 | Parameter_Associations => |
2326 | New_List ( | |
2327 | Obj_Ref, | |
aad6babd | 2328 | |
acf97c11 | 2329 | Make_Unchecked_Type_Conversion (Loc, -- entry index |
2330 | Subtype_Mark => | |
83c6c069 | 2331 | New_Occurrence_Of |
55868293 | 2332 | (RTE (RE_Protected_Entry_Index), Loc), |
acf97c11 | 2333 | Expression => Make_Identifier (Loc, Name_uI)), |
d62940bf | 2334 | |
acf97c11 | 2335 | Make_Identifier (Loc, Name_uP), -- parameter block |
83c6c069 | 2336 | New_Occurrence_Of -- Asynchronous_Call |
55868293 | 2337 | (RTE (RE_Asynchronous_Call), Loc), |
83c6c069 | 2338 | New_Occurrence_Of -- comm block |
2339 | (Com_Block, Loc)))); | |
acf97c11 | 2340 | |
acf97c11 | 2341 | when others => |
2342 | raise Program_Error; | |
2343 | end case; | |
725a69d2 | 2344 | |
2345 | -- Generate: | |
cdb1c38f | 2346 | -- B := Dummy_Communication_Block (Bnn); |
725a69d2 | 2347 | |
2348 | Append_To (Stmts, | |
2349 | Make_Assignment_Statement (Loc, | |
55868293 | 2350 | Name => Make_Identifier (Loc, Name_uB), |
725a69d2 | 2351 | Expression => |
2352 | Make_Unchecked_Type_Conversion (Loc, | |
2353 | Subtype_Mark => | |
83c6c069 | 2354 | New_Occurrence_Of ( |
725a69d2 | 2355 | RTE (RE_Dummy_Communication_Block), Loc), |
2356 | Expression => | |
83c6c069 | 2357 | New_Occurrence_Of (Com_Block, Loc)))); |
725a69d2 | 2358 | |
a053db0d | 2359 | -- Generate: |
2360 | -- F := False; | |
2361 | ||
2362 | Append_To (Stmts, | |
2363 | Make_Assignment_Statement (Loc, | |
aabafdc2 | 2364 | Name => Make_Identifier (Loc, Name_uF), |
83c6c069 | 2365 | Expression => New_Occurrence_Of (Standard_False, Loc))); |
a053db0d | 2366 | |
76a1c25b | 2367 | else |
2368 | pragma Assert (Ekind (Conc_Typ) = E_Task_Type); | |
d62940bf | 2369 | |
76a1c25b | 2370 | -- Generate: |
cdb1c38f | 2371 | -- Task_Entry_Call |
2372 | -- (T._task_id, -- Acceptor | |
2373 | -- Task_Entry_Index! (I), -- E | |
2374 | -- P, -- Uninterpreted_Data | |
2375 | -- Asynchronous_Call, -- Mode | |
2376 | -- F); -- Rendezvous_Successful | |
ee6ba406 | 2377 | |
acf97c11 | 2378 | -- where T is the task object, I is the entry index, P is the |
76a1c25b | 2379 | -- wrapped parameters and F is the status flag. |
ee6ba406 | 2380 | |
76a1c25b | 2381 | Append_To (Stmts, |
2382 | Make_Procedure_Call_Statement (Loc, | |
2383 | Name => | |
83c6c069 | 2384 | New_Occurrence_Of (RTE (RE_Task_Entry_Call), Loc), |
76a1c25b | 2385 | Parameter_Associations => |
2386 | New_List ( | |
76a1c25b | 2387 | Make_Selected_Component (Loc, -- T._task_id |
55868293 | 2388 | Prefix => Make_Identifier (Loc, Name_uT), |
2389 | Selector_Name => Make_Identifier (Loc, Name_uTask_Id)), | |
ee6ba406 | 2390 | |
76a1c25b | 2391 | Make_Unchecked_Type_Conversion (Loc, -- entry index |
2392 | Subtype_Mark => | |
83c6c069 | 2393 | New_Occurrence_Of (RTE (RE_Task_Entry_Index), Loc), |
55868293 | 2394 | Expression => Make_Identifier (Loc, Name_uI)), |
ee6ba406 | 2395 | |
76a1c25b | 2396 | Make_Identifier (Loc, Name_uP), -- parameter block |
83c6c069 | 2397 | New_Occurrence_Of -- Asynchronous_Call |
55868293 | 2398 | (RTE (RE_Asynchronous_Call), Loc), |
76a1c25b | 2399 | Make_Identifier (Loc, Name_uF)))); -- status flag |
2400 | end if; | |
7c949aad | 2401 | |
2402 | else | |
2403 | -- Ensure that the statements list is non-empty | |
2404 | ||
a053db0d | 2405 | Append_To (Stmts, |
2406 | Make_Assignment_Statement (Loc, | |
aabafdc2 | 2407 | Name => Make_Identifier (Loc, Name_uF), |
83c6c069 | 2408 | Expression => New_Occurrence_Of (Standard_False, Loc))); |
76a1c25b | 2409 | end if; |
ee6ba406 | 2410 | |
76a1c25b | 2411 | return |
2412 | Make_Subprogram_Body (Loc, | |
aabafdc2 | 2413 | Specification => |
76a1c25b | 2414 | Make_Disp_Asynchronous_Select_Spec (Typ), |
aabafdc2 | 2415 | Declarations => Decls, |
76a1c25b | 2416 | Handled_Statement_Sequence => |
2417 | Make_Handled_Sequence_Of_Statements (Loc, Stmts)); | |
2418 | end Make_Disp_Asynchronous_Select_Body; | |
ee6ba406 | 2419 | |
76a1c25b | 2420 | ---------------------------------------- |
2421 | -- Make_Disp_Asynchronous_Select_Spec -- | |
2422 | ---------------------------------------- | |
ee6ba406 | 2423 | |
76a1c25b | 2424 | function Make_Disp_Asynchronous_Select_Spec |
2425 | (Typ : Entity_Id) return Node_Id | |
2426 | is | |
2427 | Loc : constant Source_Ptr := Sloc (Typ); | |
2428 | Def_Id : constant Node_Id := | |
2429 | Make_Defining_Identifier (Loc, | |
2430 | Name_uDisp_Asynchronous_Select); | |
2431 | Params : constant List_Id := New_List; | |
ee6ba406 | 2432 | |
76a1c25b | 2433 | begin |
68f95949 | 2434 | pragma Assert (not Restriction_Active (No_Dispatching_Calls)); |
2435 | ||
725a69d2 | 2436 | -- T : in out Typ; -- Object parameter |
2437 | -- S : Integer; -- Primitive operation slot | |
2438 | -- P : Address; -- Wrapped parameters | |
2439 | -- B : out Dummy_Communication_Block; -- Communication block dummy | |
2440 | -- F : out Boolean; -- Status flag | |
ee6ba406 | 2441 | |
725a69d2 | 2442 | Append_List_To (Params, New_List ( |
2443 | ||
2444 | Make_Parameter_Specification (Loc, | |
2445 | Defining_Identifier => | |
2446 | Make_Defining_Identifier (Loc, Name_uT), | |
2447 | Parameter_Type => | |
83c6c069 | 2448 | New_Occurrence_Of (Typ, Loc), |
725a69d2 | 2449 | In_Present => True, |
2450 | Out_Present => True), | |
2451 | ||
2452 | Make_Parameter_Specification (Loc, | |
2453 | Defining_Identifier => | |
2454 | Make_Defining_Identifier (Loc, Name_uS), | |
2455 | Parameter_Type => | |
83c6c069 | 2456 | New_Occurrence_Of (Standard_Integer, Loc)), |
725a69d2 | 2457 | |
2458 | Make_Parameter_Specification (Loc, | |
2459 | Defining_Identifier => | |
2460 | Make_Defining_Identifier (Loc, Name_uP), | |
2461 | Parameter_Type => | |
83c6c069 | 2462 | New_Occurrence_Of (RTE (RE_Address), Loc)), |
725a69d2 | 2463 | |
2464 | Make_Parameter_Specification (Loc, | |
2465 | Defining_Identifier => | |
2466 | Make_Defining_Identifier (Loc, Name_uB), | |
2467 | Parameter_Type => | |
83c6c069 | 2468 | New_Occurrence_Of (RTE (RE_Dummy_Communication_Block), Loc), |
725a69d2 | 2469 | Out_Present => True), |
ee6ba406 | 2470 | |
725a69d2 | 2471 | Make_Parameter_Specification (Loc, |
2472 | Defining_Identifier => | |
2473 | Make_Defining_Identifier (Loc, Name_uF), | |
2474 | Parameter_Type => | |
83c6c069 | 2475 | New_Occurrence_Of (Standard_Boolean, Loc), |
725a69d2 | 2476 | Out_Present => True))); |
7189d17f | 2477 | |
76a1c25b | 2478 | return |
725a69d2 | 2479 | Make_Procedure_Specification (Loc, |
2480 | Defining_Unit_Name => Def_Id, | |
2481 | Parameter_Specifications => Params); | |
76a1c25b | 2482 | end Make_Disp_Asynchronous_Select_Spec; |
ee6ba406 | 2483 | |
76a1c25b | 2484 | --------------------------------------- |
2485 | -- Make_Disp_Conditional_Select_Body -- | |
2486 | --------------------------------------- | |
ee6ba406 | 2487 | |
cdb1c38f | 2488 | -- For interface types, generate: |
2489 | ||
2490 | -- procedure _Disp_Conditional_Select | |
2491 | -- (T : in out <Typ>; | |
2492 | -- S : Integer; | |
2493 | -- P : System.Address; | |
2494 | -- C : out Ada.Tags.Prim_Op_Kind; | |
2495 | -- F : out Boolean) | |
2496 | -- is | |
2497 | -- begin | |
a053db0d | 2498 | -- F := False; |
2499 | -- C := Ada.Tags.POK_Function; | |
cdb1c38f | 2500 | -- end _Disp_Conditional_Select; |
2501 | ||
2502 | -- For protected types, generate: | |
2503 | ||
2504 | -- procedure _Disp_Conditional_Select | |
2505 | -- (T : in out <Typ>; | |
2506 | -- S : Integer; | |
2507 | -- P : System.Address; | |
2508 | -- C : out Ada.Tags.Prim_Op_Kind; | |
2509 | -- F : out Boolean) | |
2510 | -- is | |
2511 | -- I : Integer; | |
2512 | -- Bnn : System.Tasking.Protected_Objects.Operations. | |
2513 | -- Communication_Block; | |
2514 | ||
2515 | -- begin | |
2516 | -- C := Ada.Tags.Get_Prim_Op_Kind (Ada.Tags.Tag (<Typ>VP, S)); | |
2517 | ||
2518 | -- if C = Ada.Tags.POK_Procedure | |
2519 | -- or else C = Ada.Tags.POK_Protected_Procedure | |
2520 | -- or else C = Ada.Tags.POK_Task_Procedure | |
2521 | -- then | |
2522 | -- F := True; | |
2523 | -- return; | |
2524 | -- end if; | |
2525 | ||
2526 | -- I := Ada.Tags.Get_Entry_Index (Ada.Tags.Tag (<Typ>VP, S)); | |
2527 | -- System.Tasking.Protected_Objects.Operations.Protected_Entry_Call | |
2528 | -- (T.object'Access, | |
2529 | -- System.Tasking.Protected_Objects.Protected_Entry_Index (I), | |
2530 | -- P, | |
2531 | -- System.Tasking.Conditional_Call, | |
2532 | -- Bnn); | |
2533 | -- F := not Cancelled (Bnn); | |
2534 | -- end _Disp_Conditional_Select; | |
2535 | ||
2536 | -- For task types, generate: | |
2537 | ||
2538 | -- procedure _Disp_Conditional_Select | |
2539 | -- (T : in out <Typ>; | |
2540 | -- S : Integer; | |
2541 | -- P : System.Address; | |
2542 | -- C : out Ada.Tags.Prim_Op_Kind; | |
2543 | -- F : out Boolean) | |
2544 | -- is | |
2545 | -- I : Integer; | |
2546 | ||
2547 | -- begin | |
2548 | -- I := Ada.Tags.Get_Entry_Index (Ada.Tags.Tag (<Typ>VP, S)); | |
2549 | -- System.Tasking.Rendezvous.Task_Entry_Call | |
2550 | -- (T._task_id, | |
2551 | -- System.Tasking.Task_Entry_Index (I), | |
2552 | -- P, | |
2553 | -- System.Tasking.Conditional_Call, | |
2554 | -- F); | |
2555 | -- end _Disp_Conditional_Select; | |
2556 | ||
76a1c25b | 2557 | function Make_Disp_Conditional_Select_Body |
2558 | (Typ : Entity_Id) return Node_Id | |
2559 | is | |
2560 | Loc : constant Source_Ptr := Sloc (Typ); | |
2561 | Blk_Nam : Entity_Id; | |
2562 | Conc_Typ : Entity_Id := Empty; | |
2563 | Decls : constant List_Id := New_List; | |
acf97c11 | 2564 | Obj_Ref : Node_Id; |
76a1c25b | 2565 | Stmts : constant List_Id := New_List; |
bf7f5966 | 2566 | Tag_Node : Node_Id; |
ee6ba406 | 2567 | |
76a1c25b | 2568 | begin |
68f95949 | 2569 | pragma Assert (not Restriction_Active (No_Dispatching_Calls)); |
2570 | ||
952af0b9 | 2571 | -- Null body is generated for interface types |
2572 | ||
76a1c25b | 2573 | if Is_Interface (Typ) then |
2574 | return | |
2575 | Make_Subprogram_Body (Loc, | |
2576 | Specification => | |
2577 | Make_Disp_Conditional_Select_Spec (Typ), | |
2578 | Declarations => | |
2579 | No_List, | |
2580 | Handled_Statement_Sequence => | |
2581 | Make_Handled_Sequence_Of_Statements (Loc, | |
a053db0d | 2582 | New_List (Make_Assignment_Statement (Loc, |
aabafdc2 | 2583 | Name => Make_Identifier (Loc, Name_uF), |
83c6c069 | 2584 | Expression => New_Occurrence_Of (Standard_False, Loc))))); |
76a1c25b | 2585 | end if; |
ee6ba406 | 2586 | |
952af0b9 | 2587 | if Is_Concurrent_Record_Type (Typ) then |
2588 | Conc_Typ := Corresponding_Concurrent_Type (Typ); | |
ee6ba406 | 2589 | |
76a1c25b | 2590 | -- Generate: |
2591 | -- I : Integer; | |
ee6ba406 | 2592 | |
76a1c25b | 2593 | -- where I will be used to capture the entry index of the primitive |
2594 | -- wrapper at position S. | |
ee6ba406 | 2595 | |
76a1c25b | 2596 | Append_To (Decls, |
2597 | Make_Object_Declaration (Loc, | |
2598 | Defining_Identifier => | |
2599 | Make_Defining_Identifier (Loc, Name_uI), | |
2600 | Object_Definition => | |
83c6c069 | 2601 | New_Occurrence_Of (Standard_Integer, Loc))); |
ee6ba406 | 2602 | |
952af0b9 | 2603 | -- Generate: |
cdb1c38f | 2604 | -- C := Ada.Tags.Get_Prim_Op_Kind (Ada.Tags.Tag! (<type>VP), S); |
ee6ba406 | 2605 | |
952af0b9 | 2606 | -- if C = POK_Procedure |
2607 | -- or else C = POK_Protected_Procedure | |
2608 | -- or else C = POK_Task_Procedure; | |
2609 | -- then | |
2610 | -- F := True; | |
2611 | -- return; | |
2612 | -- end if; | |
aad6babd | 2613 | |
e58ae6f1 | 2614 | Build_Common_Dispatching_Select_Statements (Typ, Stmts); |
aad6babd | 2615 | |
76a1c25b | 2616 | -- Generate: |
2617 | -- Bnn : Communication_Block; | |
aad6babd | 2618 | |
cdb1c38f | 2619 | -- where Bnn is the name of the communication block used in the |
2620 | -- call to Protected_Entry_Call. | |
aad6babd | 2621 | |
ec97ce79 | 2622 | Blk_Nam := Make_Temporary (Loc, 'B'); |
76a1c25b | 2623 | Append_To (Decls, |
2624 | Make_Object_Declaration (Loc, | |
2625 | Defining_Identifier => | |
2626 | Blk_Nam, | |
2627 | Object_Definition => | |
83c6c069 | 2628 | New_Occurrence_Of (RTE (RE_Communication_Block), Loc))); |
aad6babd | 2629 | |
76a1c25b | 2630 | -- Generate: |
cdb1c38f | 2631 | -- I := Ada.Tags.Get_Entry_Index (Ada.Tags.Tag! (<type>VP), S); |
aad6babd | 2632 | |
76a1c25b | 2633 | -- I is the entry index and S is the dispatch table slot |
aad6babd | 2634 | |
bf7f5966 | 2635 | if Tagged_Type_Expansion then |
2636 | Tag_Node := | |
2637 | Unchecked_Convert_To (RTE (RE_Tag), | |
83c6c069 | 2638 | New_Occurrence_Of |
bf7f5966 | 2639 | (Node (First_Elmt (Access_Disp_Table (Typ))), Loc)); |
2640 | ||
2641 | else | |
2642 | Tag_Node := | |
2643 | Make_Attribute_Reference (Loc, | |
83c6c069 | 2644 | Prefix => New_Occurrence_Of (Typ, Loc), |
bf7f5966 | 2645 | Attribute_Name => Name_Tag); |
2646 | end if; | |
2647 | ||
76a1c25b | 2648 | Append_To (Stmts, |
2649 | Make_Assignment_Statement (Loc, | |
55868293 | 2650 | Name => Make_Identifier (Loc, Name_uI), |
76a1c25b | 2651 | Expression => |
725a69d2 | 2652 | Make_Function_Call (Loc, |
cdb1c38f | 2653 | Name => |
83c6c069 | 2654 | New_Occurrence_Of (RTE (RE_Get_Entry_Index), Loc), |
cdb1c38f | 2655 | Parameter_Associations => |
2656 | New_List ( | |
bf7f5966 | 2657 | Tag_Node, |
cdb1c38f | 2658 | Make_Identifier (Loc, Name_uS))))); |
ee6ba406 | 2659 | |
76a1c25b | 2660 | if Ekind (Conc_Typ) = E_Protected_Type then |
ee6ba406 | 2661 | |
acf97c11 | 2662 | Obj_Ref := -- T._object'Access |
2663 | Make_Attribute_Reference (Loc, | |
2664 | Attribute_Name => Name_Unchecked_Access, | |
2665 | Prefix => | |
2666 | Make_Selected_Component (Loc, | |
2667 | Prefix => Make_Identifier (Loc, Name_uT), | |
2668 | Selector_Name => Make_Identifier (Loc, Name_uObject))); | |
ee6ba406 | 2669 | |
acf97c11 | 2670 | case Corresponding_Runtime_Package (Conc_Typ) is |
2671 | when System_Tasking_Protected_Objects_Entries => | |
2672 | -- Generate: | |
e1c20931 | 2673 | |
acf97c11 | 2674 | -- Protected_Entry_Call |
2675 | -- (T._object'Access, -- Object | |
2676 | -- Protected_Entry_Index! (I), -- E | |
2677 | -- P, -- Uninterpreted_Data | |
2678 | -- Conditional_Call, -- Mode | |
2679 | -- Bnn); -- Block | |
e1c20931 | 2680 | |
acf97c11 | 2681 | -- where T is the protected object, I is the entry index, P |
2682 | -- are the wrapped parameters and Bnn is the name of the | |
2683 | -- communication block. | |
d62940bf | 2684 | |
acf97c11 | 2685 | Append_To (Stmts, |
2686 | Make_Procedure_Call_Statement (Loc, | |
2687 | Name => | |
83c6c069 | 2688 | New_Occurrence_Of (RTE (RE_Protected_Entry_Call), Loc), |
acf97c11 | 2689 | Parameter_Associations => |
2690 | New_List ( | |
2691 | Obj_Ref, | |
d62940bf | 2692 | |
acf97c11 | 2693 | Make_Unchecked_Type_Conversion (Loc, -- entry index |
2694 | Subtype_Mark => | |
83c6c069 | 2695 | New_Occurrence_Of |
acf97c11 | 2696 | (RTE (RE_Protected_Entry_Index), Loc), |
2697 | Expression => Make_Identifier (Loc, Name_uI)), | |
2698 | ||
2699 | Make_Identifier (Loc, Name_uP), -- parameter block | |
2700 | ||
83c6c069 | 2701 | New_Occurrence_Of -- Conditional_Call |
2702 | (RTE (RE_Conditional_Call), Loc), | |
2703 | New_Occurrence_Of -- Bnn | |
2704 | (Blk_Nam, Loc)))); | |
acf97c11 | 2705 | |
2706 | when System_Tasking_Protected_Objects_Single_Entry => | |
2707 | ||
2708 | -- If we are compiling for a restricted run-time, the call | |
2709 | -- uses the simpler form. | |
2710 | ||
2711 | Append_To (Stmts, | |
2712 | Make_Procedure_Call_Statement (Loc, | |
2713 | Name => | |
83c6c069 | 2714 | New_Occurrence_Of |
acf97c11 | 2715 | (RTE (RE_Protected_Single_Entry_Call), Loc), |
2716 | Parameter_Associations => | |
2717 | New_List ( | |
2718 | Obj_Ref, | |
2719 | ||
2720 | Make_Attribute_Reference (Loc, | |
55868293 | 2721 | Prefix => Make_Identifier (Loc, Name_uP), |
acf97c11 | 2722 | Attribute_Name => Name_Address), |
2723 | ||
83c6c069 | 2724 | New_Occurrence_Of |
acf97c11 | 2725 | (RTE (RE_Conditional_Call), Loc)))); |
2726 | when others => | |
2727 | raise Program_Error; | |
2728 | end case; | |
d62940bf | 2729 | |
76a1c25b | 2730 | -- Generate: |
2731 | -- F := not Cancelled (Bnn); | |
e1c20931 | 2732 | |
76a1c25b | 2733 | -- where F is the success flag. The status of Cancelled is negated |
2734 | -- in order to match the behaviour of the version for task types. | |
e1c20931 | 2735 | |
76a1c25b | 2736 | Append_To (Stmts, |
2737 | Make_Assignment_Statement (Loc, | |
55868293 | 2738 | Name => Make_Identifier (Loc, Name_uF), |
76a1c25b | 2739 | Expression => |
2740 | Make_Op_Not (Loc, | |
2741 | Right_Opnd => | |
2742 | Make_Function_Call (Loc, | |
2743 | Name => | |
83c6c069 | 2744 | New_Occurrence_Of (RTE (RE_Cancelled), Loc), |
76a1c25b | 2745 | Parameter_Associations => |
2746 | New_List ( | |
83c6c069 | 2747 | New_Occurrence_Of (Blk_Nam, Loc)))))); |
76a1c25b | 2748 | else |
2749 | pragma Assert (Ekind (Conc_Typ) = E_Task_Type); | |
d62940bf | 2750 | |
76a1c25b | 2751 | -- Generate: |
cdb1c38f | 2752 | -- Task_Entry_Call |
2753 | -- (T._task_id, -- Acceptor | |
2754 | -- Task_Entry_Index! (I), -- E | |
2755 | -- P, -- Uninterpreted_Data | |
2756 | -- Conditional_Call, -- Mode | |
2757 | -- F); -- Rendezvous_Successful | |
d62940bf | 2758 | |
76a1c25b | 2759 | -- where T is the task object, I is the entry index, P are the |
2760 | -- wrapped parameters and F is the status flag. | |
e1c20931 | 2761 | |
76a1c25b | 2762 | Append_To (Stmts, |
2763 | Make_Procedure_Call_Statement (Loc, | |
2764 | Name => | |
83c6c069 | 2765 | New_Occurrence_Of (RTE (RE_Task_Entry_Call), Loc), |
76a1c25b | 2766 | Parameter_Associations => |
2767 | New_List ( | |
2768 | ||
2769 | Make_Selected_Component (Loc, -- T._task_id | |
55868293 | 2770 | Prefix => Make_Identifier (Loc, Name_uT), |
2771 | Selector_Name => Make_Identifier (Loc, Name_uTask_Id)), | |
76a1c25b | 2772 | |
2773 | Make_Unchecked_Type_Conversion (Loc, -- entry index | |
2774 | Subtype_Mark => | |
83c6c069 | 2775 | New_Occurrence_Of (RTE (RE_Task_Entry_Index), Loc), |
55868293 | 2776 | Expression => Make_Identifier (Loc, Name_uI)), |
76a1c25b | 2777 | |
2778 | Make_Identifier (Loc, Name_uP), -- parameter block | |
83c6c069 | 2779 | New_Occurrence_Of -- Conditional_Call |
55868293 | 2780 | (RTE (RE_Conditional_Call), Loc), |
76a1c25b | 2781 | Make_Identifier (Loc, Name_uF)))); -- status flag |
d62940bf | 2782 | end if; |
7c949aad | 2783 | |
2784 | else | |
a053db0d | 2785 | -- Initialize out parameters |
7c949aad | 2786 | |
a053db0d | 2787 | Append_To (Stmts, |
2788 | Make_Assignment_Statement (Loc, | |
aabafdc2 | 2789 | Name => Make_Identifier (Loc, Name_uF), |
83c6c069 | 2790 | Expression => New_Occurrence_Of (Standard_False, Loc))); |
a053db0d | 2791 | Append_To (Stmts, |
2792 | Make_Assignment_Statement (Loc, | |
aabafdc2 | 2793 | Name => Make_Identifier (Loc, Name_uC), |
83c6c069 | 2794 | Expression => New_Occurrence_Of (RTE (RE_POK_Function), Loc))); |
76a1c25b | 2795 | end if; |
2796 | ||
2797 | return | |
2798 | Make_Subprogram_Body (Loc, | |
aabafdc2 | 2799 | Specification => |
76a1c25b | 2800 | Make_Disp_Conditional_Select_Spec (Typ), |
aabafdc2 | 2801 | Declarations => Decls, |
76a1c25b | 2802 | Handled_Statement_Sequence => |
2803 | Make_Handled_Sequence_Of_Statements (Loc, Stmts)); | |
2804 | end Make_Disp_Conditional_Select_Body; | |
2805 | ||
2806 | --------------------------------------- | |
2807 | -- Make_Disp_Conditional_Select_Spec -- | |
2808 | --------------------------------------- | |
2809 | ||
2810 | function Make_Disp_Conditional_Select_Spec | |
2811 | (Typ : Entity_Id) return Node_Id | |
2812 | is | |
2813 | Loc : constant Source_Ptr := Sloc (Typ); | |
2814 | Def_Id : constant Node_Id := | |
2815 | Make_Defining_Identifier (Loc, | |
2816 | Name_uDisp_Conditional_Select); | |
2817 | Params : constant List_Id := New_List; | |
2818 | ||
2819 | begin | |
68f95949 | 2820 | pragma Assert (not Restriction_Active (No_Dispatching_Calls)); |
2821 | ||
725a69d2 | 2822 | -- T : in out Typ; -- Object parameter |
2823 | -- S : Integer; -- Primitive operation slot | |
2824 | -- P : Address; -- Wrapped parameters | |
2825 | -- C : out Prim_Op_Kind; -- Call kind | |
2826 | -- F : out Boolean; -- Status flag | |
2827 | ||
2828 | Append_List_To (Params, New_List ( | |
2829 | ||
2830 | Make_Parameter_Specification (Loc, | |
2831 | Defining_Identifier => | |
2832 | Make_Defining_Identifier (Loc, Name_uT), | |
2833 | Parameter_Type => | |
83c6c069 | 2834 | New_Occurrence_Of (Typ, Loc), |
725a69d2 | 2835 | In_Present => True, |
2836 | Out_Present => True), | |
2837 | ||
2838 | Make_Parameter_Specification (Loc, | |
2839 | Defining_Identifier => | |
2840 | Make_Defining_Identifier (Loc, Name_uS), | |
2841 | Parameter_Type => | |
83c6c069 | 2842 | New_Occurrence_Of (Standard_Integer, Loc)), |
725a69d2 | 2843 | |
2844 | Make_Parameter_Specification (Loc, | |
2845 | Defining_Identifier => | |
2846 | Make_Defining_Identifier (Loc, Name_uP), | |
2847 | Parameter_Type => | |
83c6c069 | 2848 | New_Occurrence_Of (RTE (RE_Address), Loc)), |
76a1c25b | 2849 | |
725a69d2 | 2850 | Make_Parameter_Specification (Loc, |
2851 | Defining_Identifier => | |
2852 | Make_Defining_Identifier (Loc, Name_uC), | |
2853 | Parameter_Type => | |
83c6c069 | 2854 | New_Occurrence_Of (RTE (RE_Prim_Op_Kind), Loc), |
725a69d2 | 2855 | Out_Present => True), |
76a1c25b | 2856 | |
725a69d2 | 2857 | Make_Parameter_Specification (Loc, |
2858 | Defining_Identifier => | |
2859 | Make_Defining_Identifier (Loc, Name_uF), | |
2860 | Parameter_Type => | |
83c6c069 | 2861 | New_Occurrence_Of (Standard_Boolean, Loc), |
725a69d2 | 2862 | Out_Present => True))); |
76a1c25b | 2863 | |
2864 | return | |
2865 | Make_Procedure_Specification (Loc, | |
2866 | Defining_Unit_Name => Def_Id, | |
2867 | Parameter_Specifications => Params); | |
2868 | end Make_Disp_Conditional_Select_Spec; | |
2869 | ||
2870 | ------------------------------------- | |
2871 | -- Make_Disp_Get_Prim_Op_Kind_Body -- | |
2872 | ------------------------------------- | |
2873 | ||
2874 | function Make_Disp_Get_Prim_Op_Kind_Body | |
2875 | (Typ : Entity_Id) return Node_Id | |
2876 | is | |
bf7f5966 | 2877 | Loc : constant Source_Ptr := Sloc (Typ); |
2878 | Tag_Node : Node_Id; | |
76a1c25b | 2879 | |
2880 | begin | |
68f95949 | 2881 | pragma Assert (not Restriction_Active (No_Dispatching_Calls)); |
2882 | ||
76a1c25b | 2883 | if Is_Interface (Typ) then |
2884 | return | |
2885 | Make_Subprogram_Body (Loc, | |
2886 | Specification => | |
2887 | Make_Disp_Get_Prim_Op_Kind_Spec (Typ), | |
2888 | Declarations => | |
2889 | New_List, | |
2890 | Handled_Statement_Sequence => | |
2891 | Make_Handled_Sequence_Of_Statements (Loc, | |
2892 | New_List (Make_Null_Statement (Loc)))); | |
e1c20931 | 2893 | end if; |
2894 | ||
d62940bf | 2895 | -- Generate: |
76a1c25b | 2896 | -- C := get_prim_op_kind (tag! (<type>VP), S); |
ee6ba406 | 2897 | |
76a1c25b | 2898 | -- where C is the out parameter capturing the call kind and S is the |
2899 | -- dispatch table slot number. | |
ee6ba406 | 2900 | |
bf7f5966 | 2901 | if Tagged_Type_Expansion then |
2902 | Tag_Node := | |
2903 | Unchecked_Convert_To (RTE (RE_Tag), | |
83c6c069 | 2904 | New_Occurrence_Of |
bf7f5966 | 2905 | (Node (First_Elmt (Access_Disp_Table (Typ))), Loc)); |
2906 | ||
2907 | else | |
2908 | Tag_Node := | |
2909 | Make_Attribute_Reference (Loc, | |
83c6c069 | 2910 | Prefix => New_Occurrence_Of (Typ, Loc), |
bf7f5966 | 2911 | Attribute_Name => Name_Tag); |
2912 | end if; | |
2913 | ||
76a1c25b | 2914 | return |
2915 | Make_Subprogram_Body (Loc, | |
2916 | Specification => | |
2917 | Make_Disp_Get_Prim_Op_Kind_Spec (Typ), | |
2918 | Declarations => | |
2919 | New_List, | |
2920 | Handled_Statement_Sequence => | |
2921 | Make_Handled_Sequence_Of_Statements (Loc, | |
2922 | New_List ( | |
2923 | Make_Assignment_Statement (Loc, | |
2924 | Name => | |
2925 | Make_Identifier (Loc, Name_uC), | |
2926 | Expression => | |
725a69d2 | 2927 | Make_Function_Call (Loc, |
2928 | Name => | |
83c6c069 | 2929 | New_Occurrence_Of (RTE (RE_Get_Prim_Op_Kind), Loc), |
725a69d2 | 2930 | Parameter_Associations => New_List ( |
bf7f5966 | 2931 | Tag_Node, |
2932 | Make_Identifier (Loc, Name_uS))))))); | |
76a1c25b | 2933 | end Make_Disp_Get_Prim_Op_Kind_Body; |
e1c20931 | 2934 | |
76a1c25b | 2935 | ------------------------------------- |
2936 | -- Make_Disp_Get_Prim_Op_Kind_Spec -- | |
2937 | ------------------------------------- | |
e1c20931 | 2938 | |
76a1c25b | 2939 | function Make_Disp_Get_Prim_Op_Kind_Spec |
2940 | (Typ : Entity_Id) return Node_Id | |
2941 | is | |
2942 | Loc : constant Source_Ptr := Sloc (Typ); | |
2943 | Def_Id : constant Node_Id := | |
2944 | Make_Defining_Identifier (Loc, | |
2945 | Name_uDisp_Get_Prim_Op_Kind); | |
2946 | Params : constant List_Id := New_List; | |
e1c20931 | 2947 | |
76a1c25b | 2948 | begin |
68f95949 | 2949 | pragma Assert (not Restriction_Active (No_Dispatching_Calls)); |
2950 | ||
725a69d2 | 2951 | -- T : in out Typ; -- Object parameter |
2952 | -- S : Integer; -- Primitive operation slot | |
2953 | -- C : out Prim_Op_Kind; -- Call kind | |
2954 | ||
2955 | Append_List_To (Params, New_List ( | |
2956 | ||
2957 | Make_Parameter_Specification (Loc, | |
2958 | Defining_Identifier => | |
2959 | Make_Defining_Identifier (Loc, Name_uT), | |
2960 | Parameter_Type => | |
83c6c069 | 2961 | New_Occurrence_Of (Typ, Loc), |
725a69d2 | 2962 | In_Present => True, |
2963 | Out_Present => True), | |
ee6ba406 | 2964 | |
725a69d2 | 2965 | Make_Parameter_Specification (Loc, |
2966 | Defining_Identifier => | |
2967 | Make_Defining_Identifier (Loc, Name_uS), | |
2968 | Parameter_Type => | |
83c6c069 | 2969 | New_Occurrence_Of (Standard_Integer, Loc)), |
ee6ba406 | 2970 | |
725a69d2 | 2971 | Make_Parameter_Specification (Loc, |
2972 | Defining_Identifier => | |
2973 | Make_Defining_Identifier (Loc, Name_uC), | |
2974 | Parameter_Type => | |
83c6c069 | 2975 | New_Occurrence_Of (RTE (RE_Prim_Op_Kind), Loc), |
725a69d2 | 2976 | Out_Present => True))); |
76a1c25b | 2977 | |
2978 | return | |
2979 | Make_Procedure_Specification (Loc, | |
2980 | Defining_Unit_Name => Def_Id, | |
2981 | Parameter_Specifications => Params); | |
2982 | end Make_Disp_Get_Prim_Op_Kind_Spec; | |
2983 | ||
2984 | -------------------------------- | |
2985 | -- Make_Disp_Get_Task_Id_Body -- | |
2986 | -------------------------------- | |
2987 | ||
2988 | function Make_Disp_Get_Task_Id_Body | |
2989 | (Typ : Entity_Id) return Node_Id | |
2990 | is | |
2991 | Loc : constant Source_Ptr := Sloc (Typ); | |
2992 | Ret : Node_Id; | |
2993 | ||
2994 | begin | |
68f95949 | 2995 | pragma Assert (not Restriction_Active (No_Dispatching_Calls)); |
2996 | ||
76a1c25b | 2997 | if Is_Concurrent_Record_Type (Typ) |
2998 | and then Ekind (Corresponding_Concurrent_Type (Typ)) = E_Task_Type | |
2999 | then | |
725a69d2 | 3000 | -- Generate: |
3001 | -- return To_Address (_T._task_id); | |
3002 | ||
76a1c25b | 3003 | Ret := |
17e14451 | 3004 | Make_Simple_Return_Statement (Loc, |
76a1c25b | 3005 | Expression => |
725a69d2 | 3006 | Make_Unchecked_Type_Conversion (Loc, |
3007 | Subtype_Mark => | |
83c6c069 | 3008 | New_Occurrence_Of (RTE (RE_Address), Loc), |
725a69d2 | 3009 | Expression => |
3010 | Make_Selected_Component (Loc, | |
55868293 | 3011 | Prefix => Make_Identifier (Loc, Name_uT), |
3012 | Selector_Name => Make_Identifier (Loc, Name_uTask_Id)))); | |
76a1c25b | 3013 | |
3014 | -- A null body is constructed for non-task types | |
3015 | ||
3016 | else | |
725a69d2 | 3017 | -- Generate: |
3018 | -- return Null_Address; | |
3019 | ||
76a1c25b | 3020 | Ret := |
17e14451 | 3021 | Make_Simple_Return_Statement (Loc, |
76a1c25b | 3022 | Expression => |
83c6c069 | 3023 | New_Occurrence_Of (RTE (RE_Null_Address), Loc)); |
76a1c25b | 3024 | end if; |
3025 | ||
3026 | return | |
3027 | Make_Subprogram_Body (Loc, | |
3028 | Specification => | |
3029 | Make_Disp_Get_Task_Id_Spec (Typ), | |
3030 | Declarations => | |
3031 | New_List, | |
3032 | Handled_Statement_Sequence => | |
3033 | Make_Handled_Sequence_Of_Statements (Loc, | |
3034 | New_List (Ret))); | |
3035 | end Make_Disp_Get_Task_Id_Body; | |
3036 | ||
3037 | -------------------------------- | |
3038 | -- Make_Disp_Get_Task_Id_Spec -- | |
3039 | -------------------------------- | |
3040 | ||
3041 | function Make_Disp_Get_Task_Id_Spec | |
3042 | (Typ : Entity_Id) return Node_Id | |
3043 | is | |
725a69d2 | 3044 | Loc : constant Source_Ptr := Sloc (Typ); |
76a1c25b | 3045 | |
3046 | begin | |
68f95949 | 3047 | pragma Assert (not Restriction_Active (No_Dispatching_Calls)); |
3048 | ||
76a1c25b | 3049 | return |
3050 | Make_Function_Specification (Loc, | |
725a69d2 | 3051 | Defining_Unit_Name => |
3052 | Make_Defining_Identifier (Loc, Name_uDisp_Get_Task_Id), | |
76a1c25b | 3053 | Parameter_Specifications => New_List ( |
3054 | Make_Parameter_Specification (Loc, | |
3055 | Defining_Identifier => | |
3056 | Make_Defining_Identifier (Loc, Name_uT), | |
3057 | Parameter_Type => | |
83c6c069 | 3058 | New_Occurrence_Of (Typ, Loc))), |
76a1c25b | 3059 | Result_Definition => |
83c6c069 | 3060 | New_Occurrence_Of (RTE (RE_Address), Loc)); |
76a1c25b | 3061 | end Make_Disp_Get_Task_Id_Spec; |
3062 | ||
cdb1c38f | 3063 | ---------------------------- |
3064 | -- Make_Disp_Requeue_Body -- | |
3065 | ---------------------------- | |
3066 | ||
3067 | function Make_Disp_Requeue_Body | |
3068 | (Typ : Entity_Id) return Node_Id | |
3069 | is | |
3070 | Loc : constant Source_Ptr := Sloc (Typ); | |
3071 | Conc_Typ : Entity_Id := Empty; | |
3072 | Stmts : constant List_Id := New_List; | |
3073 | ||
3074 | begin | |
3075 | pragma Assert (not Restriction_Active (No_Dispatching_Calls)); | |
3076 | ||
3077 | -- Null body is generated for interface types and non-concurrent | |
3078 | -- tagged types. | |
3079 | ||
3080 | if Is_Interface (Typ) | |
3081 | or else not Is_Concurrent_Record_Type (Typ) | |
3082 | then | |
3083 | return | |
3084 | Make_Subprogram_Body (Loc, | |
3085 | Specification => | |
3086 | Make_Disp_Requeue_Spec (Typ), | |
3087 | Declarations => | |
3088 | No_List, | |
3089 | Handled_Statement_Sequence => | |
3090 | Make_Handled_Sequence_Of_Statements (Loc, | |
3091 | New_List (Make_Null_Statement (Loc)))); | |
3092 | end if; | |
3093 | ||
3094 | Conc_Typ := Corresponding_Concurrent_Type (Typ); | |
3095 | ||
3096 | if Ekind (Conc_Typ) = E_Protected_Type then | |
3097 | ||
3098 | -- Generate statements: | |
3099 | -- if F then | |
3100 | -- System.Tasking.Protected_Objects.Operations. | |
3101 | -- Requeue_Protected_Entry | |
3102 | -- (Protection_Entries_Access (P), | |
3103 | -- O._object'Unchecked_Access, | |
3104 | -- Protected_Entry_Index (I), | |
3105 | -- A); | |
3106 | -- else | |
3107 | -- System.Tasking.Protected_Objects.Operations. | |
3108 | -- Requeue_Task_To_Protected_Entry | |
3109 | -- (O._object'Unchecked_Access, | |
3110 | -- Protected_Entry_Index (I), | |
3111 | -- A); | |
3112 | -- end if; | |
3113 | ||
acf97c11 | 3114 | if Restriction_Active (No_Entry_Queue) then |
3115 | Append_To (Stmts, Make_Null_Statement (Loc)); | |
3116 | else | |
3117 | Append_To (Stmts, | |
3118 | Make_If_Statement (Loc, | |
55868293 | 3119 | Condition => Make_Identifier (Loc, Name_uF), |
cdb1c38f | 3120 | |
acf97c11 | 3121 | Then_Statements => |
3122 | New_List ( | |
cdb1c38f | 3123 | |
acf97c11 | 3124 | -- Call to Requeue_Protected_Entry |
cdb1c38f | 3125 | |
acf97c11 | 3126 | Make_Procedure_Call_Statement (Loc, |
3127 | Name => | |
83c6c069 | 3128 | New_Occurrence_Of ( |
acf97c11 | 3129 | RTE (RE_Requeue_Protected_Entry), Loc), |
3130 | Parameter_Associations => | |
3131 | New_List ( | |
3132 | ||
3133 | Make_Unchecked_Type_Conversion (Loc, -- PEA (P) | |
3134 | Subtype_Mark => | |
83c6c069 | 3135 | New_Occurrence_Of ( |
acf97c11 | 3136 | RTE (RE_Protection_Entries_Access), Loc), |
3137 | Expression => | |
3138 | Make_Identifier (Loc, Name_uP)), | |
3139 | ||
3140 | Make_Attribute_Reference (Loc, -- O._object'Acc | |
3141 | Attribute_Name => | |
3142 | Name_Unchecked_Access, | |
3143 | Prefix => | |
3144 | Make_Selected_Component (Loc, | |
55868293 | 3145 | Prefix => |
acf97c11 | 3146 | Make_Identifier (Loc, Name_uO), |
3147 | Selector_Name => | |
3148 | Make_Identifier (Loc, Name_uObject))), | |
3149 | ||
3150 | Make_Unchecked_Type_Conversion (Loc, -- entry index | |
3151 | Subtype_Mark => | |
83c6c069 | 3152 | New_Occurrence_Of ( |
acf97c11 | 3153 | RTE (RE_Protected_Entry_Index), Loc), |
55868293 | 3154 | Expression => Make_Identifier (Loc, Name_uI)), |
cdb1c38f | 3155 | |
acf97c11 | 3156 | Make_Identifier (Loc, Name_uA)))), -- abort status |
cdb1c38f | 3157 | |
acf97c11 | 3158 | Else_Statements => |
3159 | New_List ( | |
cdb1c38f | 3160 | |
acf97c11 | 3161 | -- Call to Requeue_Task_To_Protected_Entry |
cdb1c38f | 3162 | |
acf97c11 | 3163 | Make_Procedure_Call_Statement (Loc, |
3164 | Name => | |
83c6c069 | 3165 | New_Occurrence_Of ( |
acf97c11 | 3166 | RTE (RE_Requeue_Task_To_Protected_Entry), Loc), |
3167 | Parameter_Associations => | |
3168 | New_List ( | |
3169 | ||
3170 | Make_Attribute_Reference (Loc, -- O._object'Acc | |
3171 | Attribute_Name => | |
3172 | Name_Unchecked_Access, | |
3173 | Prefix => | |
3174 | Make_Selected_Component (Loc, | |
3175 | Prefix => | |
3176 | Make_Identifier (Loc, Name_uO), | |
3177 | Selector_Name => | |
3178 | Make_Identifier (Loc, Name_uObject))), | |
3179 | ||
3180 | Make_Unchecked_Type_Conversion (Loc, -- entry index | |
3181 | Subtype_Mark => | |
83c6c069 | 3182 | New_Occurrence_Of ( |
acf97c11 | 3183 | RTE (RE_Protected_Entry_Index), Loc), |
3184 | Expression => | |
3185 | Make_Identifier (Loc, Name_uI)), | |
cdb1c38f | 3186 | |
acf97c11 | 3187 | Make_Identifier (Loc, Name_uA)))))); -- abort status |
3188 | end if; | |
cdb1c38f | 3189 | else |
3190 | pragma Assert (Is_Task_Type (Conc_Typ)); | |
3191 | ||
3192 | -- Generate: | |
3193 | -- if F then | |
3194 | -- System.Tasking.Rendezvous.Requeue_Protected_To_Task_Entry | |
3195 | -- (Protection_Entries_Access (P), | |
3196 | -- O._task_id, | |
3197 | -- Task_Entry_Index (I), | |
3198 | -- A); | |
3199 | -- else | |
3200 | -- System.Tasking.Rendezvous.Requeue_Task_Entry | |
3201 | -- (O._task_id, | |
3202 | -- Task_Entry_Index (I), | |
3203 | -- A); | |
3204 | -- end if; | |
3205 | ||
3206 | Append_To (Stmts, | |
3207 | Make_If_Statement (Loc, | |
55868293 | 3208 | Condition => Make_Identifier (Loc, Name_uF), |
cdb1c38f | 3209 | |
55868293 | 3210 | Then_Statements => New_List ( |
cdb1c38f | 3211 | |
55868293 | 3212 | -- Call to Requeue_Protected_To_Task_Entry |
cdb1c38f | 3213 | |
55868293 | 3214 | Make_Procedure_Call_Statement (Loc, |
3215 | Name => | |
83c6c069 | 3216 | New_Occurrence_Of |
55868293 | 3217 | (RTE (RE_Requeue_Protected_To_Task_Entry), Loc), |
cdb1c38f | 3218 | |
55868293 | 3219 | Parameter_Associations => New_List ( |
cdb1c38f | 3220 | |
55868293 | 3221 | Make_Unchecked_Type_Conversion (Loc, -- PEA (P) |
3222 | Subtype_Mark => | |
83c6c069 | 3223 | New_Occurrence_Of |
55868293 | 3224 | (RTE (RE_Protection_Entries_Access), Loc), |
3225 | Expression => Make_Identifier (Loc, Name_uP)), | |
cdb1c38f | 3226 | |
55868293 | 3227 | Make_Selected_Component (Loc, -- O._task_id |
3228 | Prefix => Make_Identifier (Loc, Name_uO), | |
3229 | Selector_Name => Make_Identifier (Loc, Name_uTask_Id)), | |
cdb1c38f | 3230 | |
55868293 | 3231 | Make_Unchecked_Type_Conversion (Loc, -- entry index |
3232 | Subtype_Mark => | |
83c6c069 | 3233 | New_Occurrence_Of (RTE (RE_Task_Entry_Index), Loc), |
55868293 | 3234 | Expression => Make_Identifier (Loc, Name_uI)), |
cdb1c38f | 3235 | |
55868293 | 3236 | Make_Identifier (Loc, Name_uA)))), -- abort status |
cdb1c38f | 3237 | |
55868293 | 3238 | Else_Statements => New_List ( |
cdb1c38f | 3239 | |
55868293 | 3240 | -- Call to Requeue_Task_Entry |
cdb1c38f | 3241 | |
55868293 | 3242 | Make_Procedure_Call_Statement (Loc, |
83c6c069 | 3243 | Name => New_Occurrence_Of (RTE (RE_Requeue_Task_Entry), Loc), |
cdb1c38f | 3244 | |
55868293 | 3245 | Parameter_Associations => New_List ( |
cdb1c38f | 3246 | |
55868293 | 3247 | Make_Selected_Component (Loc, -- O._task_id |
3248 | Prefix => Make_Identifier (Loc, Name_uO), | |
3249 | Selector_Name => Make_Identifier (Loc, Name_uTask_Id)), | |
cdb1c38f | 3250 | |
55868293 | 3251 | Make_Unchecked_Type_Conversion (Loc, -- entry index |
3252 | Subtype_Mark => | |
83c6c069 | 3253 | New_Occurrence_Of (RTE (RE_Task_Entry_Index), Loc), |
55868293 | 3254 | Expression => Make_Identifier (Loc, Name_uI)), |
cdb1c38f | 3255 | |
55868293 | 3256 | Make_Identifier (Loc, Name_uA)))))); -- abort status |
cdb1c38f | 3257 | end if; |
3258 | ||
3259 | -- Even though no declarations are needed in both cases, we allocate | |
3260 | -- a list for entities added by Freeze. | |
3261 | ||
3262 | return | |
3263 | Make_Subprogram_Body (Loc, | |
3264 | Specification => | |
3265 | Make_Disp_Requeue_Spec (Typ), | |
3266 | Declarations => | |
3267 | New_List, | |
3268 | Handled_Statement_Sequence => | |
3269 | Make_Handled_Sequence_Of_Statements (Loc, Stmts)); | |
3270 | end Make_Disp_Requeue_Body; | |
3271 | ||
3272 | ---------------------------- | |
3273 | -- Make_Disp_Requeue_Spec -- | |
3274 | ---------------------------- | |
3275 | ||
3276 | function Make_Disp_Requeue_Spec | |
3277 | (Typ : Entity_Id) return Node_Id | |
3278 | is | |
3279 | Loc : constant Source_Ptr := Sloc (Typ); | |
3280 | ||
3281 | begin | |
3282 | pragma Assert (not Restriction_Active (No_Dispatching_Calls)); | |
3283 | ||
3284 | -- O : in out Typ; - Object parameter | |
3285 | -- F : Boolean; - Protected (True) / task (False) flag | |
3286 | -- P : Address; - Protection_Entries_Access value | |
3287 | -- I : Entry_Index - Index of entry call | |
3288 | -- A : Boolean - Abort flag | |
3289 | ||
3290 | -- Note that the Protection_Entries_Access value is represented as a | |
3291 | -- System.Address in order to avoid dragging in the tasking runtime | |
3292 | -- when compiling sources without tasking constructs. | |
3293 | ||
3294 | return | |
3295 | Make_Procedure_Specification (Loc, | |
3296 | Defining_Unit_Name => | |
3297 | Make_Defining_Identifier (Loc, Name_uDisp_Requeue), | |
3298 | ||
3299 | Parameter_Specifications => | |
3300 | New_List ( | |
3301 | ||
3302 | Make_Parameter_Specification (Loc, -- O | |
3303 | Defining_Identifier => | |
3304 | Make_Defining_Identifier (Loc, Name_uO), | |
3305 | Parameter_Type => | |
83c6c069 | 3306 | New_Occurrence_Of (Typ, Loc), |
cdb1c38f | 3307 | In_Present => True, |
3308 | Out_Present => True), | |
3309 | ||
3310 | Make_Parameter_Specification (Loc, -- F | |
3311 | Defining_Identifier => | |
3312 | Make_Defining_Identifier (Loc, Name_uF), | |
3313 | Parameter_Type => | |
83c6c069 | 3314 | New_Occurrence_Of (Standard_Boolean, Loc)), |
cdb1c38f | 3315 | |
3316 | Make_Parameter_Specification (Loc, -- P | |
3317 | Defining_Identifier => | |
3318 | Make_Defining_Identifier (Loc, Name_uP), | |
3319 | Parameter_Type => | |
83c6c069 | 3320 | New_Occurrence_Of (RTE (RE_Address), Loc)), |
cdb1c38f | 3321 | |
3322 | Make_Parameter_Specification (Loc, -- I | |
3323 | Defining_Identifier => | |
3324 | Make_Defining_Identifier (Loc, Name_uI), | |
3325 | Parameter_Type => | |
83c6c069 | 3326 | New_Occurrence_Of (Standard_Integer, Loc)), |
cdb1c38f | 3327 | |
3328 | Make_Parameter_Specification (Loc, -- A | |
3329 | Defining_Identifier => | |
3330 | Make_Defining_Identifier (Loc, Name_uA), | |
3331 | Parameter_Type => | |
83c6c069 | 3332 | New_Occurrence_Of (Standard_Boolean, Loc)))); |
cdb1c38f | 3333 | end Make_Disp_Requeue_Spec; |
3334 | ||
76a1c25b | 3335 | --------------------------------- |
3336 | -- Make_Disp_Timed_Select_Body -- | |
3337 | --------------------------------- | |
3338 | ||
cdb1c38f | 3339 | -- For interface types, generate: |
3340 | ||
3341 | -- procedure _Disp_Timed_Select | |
3342 | -- (T : in out <Typ>; | |
3343 | -- S : Integer; | |
3344 | -- P : System.Address; | |
3345 | -- D : Duration; | |
3346 | -- M : Integer; | |
3347 | -- C : out Ada.Tags.Prim_Op_Kind; | |
3348 | -- F : out Boolean) | |
3349 | -- is | |
3350 | -- begin | |
a053db0d | 3351 | -- F := False; |
3352 | -- C := Ada.Tags.POK_Function; | |
cdb1c38f | 3353 | -- end _Disp_Timed_Select; |
3354 | ||
3355 | -- For protected types, generate: | |
3356 | ||
3357 | -- procedure _Disp_Timed_Select | |
3358 | -- (T : in out <Typ>; | |
3359 | -- S : Integer; | |
3360 | -- P : System.Address; | |
3361 | -- D : Duration; | |
3362 | -- M : Integer; | |
3363 | -- C : out Ada.Tags.Prim_Op_Kind; | |
3364 | -- F : out Boolean) | |
3365 | -- is | |
3366 | -- I : Integer; | |
3367 | ||
3368 | -- begin | |
3369 | -- C := Ada.Tags.Get_Prim_Op_Kind (Ada.Tags.Tag (<Typ>VP), S); | |
3370 | ||
3371 | -- if C = Ada.Tags.POK_Procedure | |
3372 | -- or else C = Ada.Tags.POK_Protected_Procedure | |
3373 | -- or else C = Ada.Tags.POK_Task_Procedure | |
3374 | -- then | |
3375 | -- F := True; | |
3376 | -- return; | |
3377 | -- end if; | |
3378 | ||
3379 | -- I := Ada.Tags.Get_Entry_Index (Ada.Tags.Tag (<Typ>VP), S); | |
3380 | -- System.Tasking.Protected_Objects.Operations. | |
3381 | -- Timed_Protected_Entry_Call | |
3382 | -- (T._object'Access, | |
3383 | -- System.Tasking.Protected_Objects.Protected_Entry_Index (I), | |
3384 | -- P, | |
3385 | -- D, | |
3386 | -- M, | |
3387 | -- F); | |
3388 | -- end _Disp_Timed_Select; | |
3389 | ||
3390 | -- For task types, generate: | |
3391 | ||
3392 | -- procedure _Disp_Timed_Select | |
3393 | -- (T : in out <Typ>; | |
3394 | -- S : Integer; | |
3395 | -- P : System.Address; | |
3396 | -- D : Duration; | |
3397 | -- M : Integer; | |
3398 | -- C : out Ada.Tags.Prim_Op_Kind; | |
3399 | -- F : out Boolean) | |
3400 | -- is | |
3401 | -- I : Integer; | |
3402 | ||
3403 | -- begin | |
3404 | -- I := Ada.Tags.Get_Entry_Index (Ada.Tags.Tag (<Typ>VP), S); | |
3405 | -- System.Tasking.Rendezvous.Timed_Task_Entry_Call | |
3406 | -- (T._task_id, | |
3407 | -- System.Tasking.Task_Entry_Index (I), | |
3408 | -- P, | |
3409 | -- D, | |
3410 | -- M, | |
a053db0d | 3411 | -- F); |
cdb1c38f | 3412 | -- end _Disp_Time_Select; |
3413 | ||
76a1c25b | 3414 | function Make_Disp_Timed_Select_Body |
3415 | (Typ : Entity_Id) return Node_Id | |
3416 | is | |
3417 | Loc : constant Source_Ptr := Sloc (Typ); | |
3418 | Conc_Typ : Entity_Id := Empty; | |
3419 | Decls : constant List_Id := New_List; | |
acf97c11 | 3420 | Obj_Ref : Node_Id; |
76a1c25b | 3421 | Stmts : constant List_Id := New_List; |
bf7f5966 | 3422 | Tag_Node : Node_Id; |
76a1c25b | 3423 | |
3424 | begin | |
68f95949 | 3425 | pragma Assert (not Restriction_Active (No_Dispatching_Calls)); |
3426 | ||
952af0b9 | 3427 | -- Null body is generated for interface types |
3428 | ||
76a1c25b | 3429 | if Is_Interface (Typ) then |
3430 | return | |
3431 | Make_Subprogram_Body (Loc, | |
3432 | Specification => | |
3433 | Make_Disp_Timed_Select_Spec (Typ), | |
3434 | Declarations => | |
3435 | New_List, | |
3436 | Handled_Statement_Sequence => | |
3437 | Make_Handled_Sequence_Of_Statements (Loc, | |
aabafdc2 | 3438 | New_List ( |
3439 | Make_Assignment_Statement (Loc, | |
3440 | Name => Make_Identifier (Loc, Name_uF), | |
83c6c069 | 3441 | Expression => New_Occurrence_Of (Standard_False, Loc))))); |
76a1c25b | 3442 | end if; |
3443 | ||
952af0b9 | 3444 | if Is_Concurrent_Record_Type (Typ) then |
3445 | Conc_Typ := Corresponding_Concurrent_Type (Typ); | |
76a1c25b | 3446 | |
3447 | -- Generate: | |
3448 | -- I : Integer; | |
3449 | ||
3450 | -- where I will be used to capture the entry index of the primitive | |
3451 | -- wrapper at position S. | |
3452 | ||
3453 | Append_To (Decls, | |
3454 | Make_Object_Declaration (Loc, | |
aabafdc2 | 3455 | Defining_Identifier => Make_Defining_Identifier (Loc, Name_uI), |
83c6c069 | 3456 | Object_Definition => |
3457 | New_Occurrence_Of (Standard_Integer, Loc))); | |
76a1c25b | 3458 | |
952af0b9 | 3459 | -- Generate: |
3460 | -- C := Get_Prim_Op_Kind (tag! (<type>VP), S); | |
76a1c25b | 3461 | |
952af0b9 | 3462 | -- if C = POK_Procedure |
3463 | -- or else C = POK_Protected_Procedure | |
3464 | -- or else C = POK_Task_Procedure; | |
3465 | -- then | |
3466 | -- F := True; | |
3467 | -- return; | |
3468 | -- end if; | |
76a1c25b | 3469 | |
e58ae6f1 | 3470 | Build_Common_Dispatching_Select_Statements (Typ, Stmts); |
76a1c25b | 3471 | |
3472 | -- Generate: | |
952af0b9 | 3473 | -- I := Get_Entry_Index (tag! (<type>VP), S); |
76a1c25b | 3474 | |
3475 | -- I is the entry index and S is the dispatch table slot | |
3476 | ||
bf7f5966 | 3477 | if Tagged_Type_Expansion then |
3478 | Tag_Node := | |
3479 | Unchecked_Convert_To (RTE (RE_Tag), | |
83c6c069 | 3480 | New_Occurrence_Of |
bf7f5966 | 3481 | (Node (First_Elmt (Access_Disp_Table (Typ))), Loc)); |
3482 | ||
3483 | else | |
3484 | Tag_Node := | |
3485 | Make_Attribute_Reference (Loc, | |
83c6c069 | 3486 | Prefix => New_Occurrence_Of (Typ, Loc), |
bf7f5966 | 3487 | Attribute_Name => Name_Tag); |
3488 | end if; | |
3489 | ||
76a1c25b | 3490 | Append_To (Stmts, |
3491 | Make_Assignment_Statement (Loc, | |
55868293 | 3492 | Name => Make_Identifier (Loc, Name_uI), |
76a1c25b | 3493 | Expression => |
725a69d2 | 3494 | Make_Function_Call (Loc, |
83c6c069 | 3495 | Name => New_Occurrence_Of (RTE (RE_Get_Entry_Index), Loc), |
cdb1c38f | 3496 | Parameter_Associations => |
3497 | New_List ( | |
bf7f5966 | 3498 | Tag_Node, |
cdb1c38f | 3499 | Make_Identifier (Loc, Name_uS))))); |
76a1c25b | 3500 | |
acf97c11 | 3501 | -- Protected case |
3502 | ||
76a1c25b | 3503 | if Ekind (Conc_Typ) = E_Protected_Type then |
3504 | ||
acf97c11 | 3505 | -- Build T._object'Access |
3506 | ||
3507 | Obj_Ref := | |
3508 | Make_Attribute_Reference (Loc, | |
3509 | Attribute_Name => Name_Unchecked_Access, | |
3510 | Prefix => | |
3511 | Make_Selected_Component (Loc, | |
3512 | Prefix => Make_Identifier (Loc, Name_uT), | |
3513 | Selector_Name => Make_Identifier (Loc, Name_uObject))); | |
3514 | ||
3515 | -- Normal case, No_Entry_Queue restriction not active. In this | |
3516 | -- case we generate: | |
3517 | ||
3518 | -- Timed_Protected_Entry_Call | |
3519 | -- (T._object'access, | |
cdb1c38f | 3520 | -- Protected_Entry_Index! (I), |
acf97c11 | 3521 | -- P, D, M, F); |
76a1c25b | 3522 | |
3523 | -- where T is the protected object, I is the entry index, P are | |
3524 | -- the wrapped parameters, D is the delay amount, M is the delay | |
3525 | -- mode and F is the status flag. | |
3526 | ||
10970cab | 3527 | -- Historically, there was also an implementation for single |
3528 | -- entry protected types (in s-tposen). However, it was removed | |
3529 | -- by also testing for no No_Select_Statements restriction in | |
3530 | -- Exp_Utils.Corresponding_Runtime_Package. This simplified the | |
8dfd0767 | 3531 | -- implementation of s-tposen.adb and provided consistency between |
3532 | -- all versions of System.Tasking.Protected_Objects.Single_Entry | |
3533 | -- (s-tposen*.adb). | |
10970cab | 3534 | |
acf97c11 | 3535 | case Corresponding_Runtime_Package (Conc_Typ) is |
3536 | when System_Tasking_Protected_Objects_Entries => | |
3537 | Append_To (Stmts, | |
3538 | Make_Procedure_Call_Statement (Loc, | |
3539 | Name => | |
83c6c069 | 3540 | New_Occurrence_Of |
acf97c11 | 3541 | (RTE (RE_Timed_Protected_Entry_Call), Loc), |
3542 | Parameter_Associations => | |
3543 | New_List ( | |
3544 | Obj_Ref, | |
3545 | ||
3546 | Make_Unchecked_Type_Conversion (Loc, -- entry index | |
3547 | Subtype_Mark => | |
83c6c069 | 3548 | New_Occurrence_Of |
acf97c11 | 3549 | (RTE (RE_Protected_Entry_Index), Loc), |
3550 | Expression => | |
3551 | Make_Identifier (Loc, Name_uI)), | |
76a1c25b | 3552 | |
acf97c11 | 3553 | Make_Identifier (Loc, Name_uP), -- parameter block |
3554 | Make_Identifier (Loc, Name_uD), -- delay | |
3555 | Make_Identifier (Loc, Name_uM), -- delay mode | |
3556 | Make_Identifier (Loc, Name_uF)))); -- status flag | |
76a1c25b | 3557 | |
acf97c11 | 3558 | when others => |
3559 | raise Program_Error; | |
3560 | end case; | |
3561 | ||
3562 | -- Task case | |
ee6ba406 | 3563 | |
ee6ba406 | 3564 | else |
76a1c25b | 3565 | pragma Assert (Ekind (Conc_Typ) = E_Task_Type); |
3566 | ||
3567 | -- Generate: | |
3568 | -- Timed_Task_Entry_Call ( | |
3569 | -- T._task_id, | |
cdb1c38f | 3570 | -- Task_Entry_Index! (I), |
76a1c25b | 3571 | -- P, |
3572 | -- D, | |
3573 | -- M, | |
3574 | -- F); | |
3575 | ||
3576 | -- where T is the task object, I is the entry index, P are the | |
3577 | -- wrapped parameters, D is the delay amount, M is the delay | |
3578 | -- mode and F is the status flag. | |
3579 | ||
3580 | Append_To (Stmts, | |
3581 | Make_Procedure_Call_Statement (Loc, | |
3582 | Name => | |
83c6c069 | 3583 | New_Occurrence_Of (RTE (RE_Timed_Task_Entry_Call), Loc), |
76a1c25b | 3584 | Parameter_Associations => |
3585 | New_List ( | |
3586 | ||
3587 | Make_Selected_Component (Loc, -- T._task_id | |
55868293 | 3588 | Prefix => Make_Identifier (Loc, Name_uT), |
3589 | Selector_Name => Make_Identifier (Loc, Name_uTask_Id)), | |
76a1c25b | 3590 | |
3591 | Make_Unchecked_Type_Conversion (Loc, -- entry index | |
3592 | Subtype_Mark => | |
83c6c069 | 3593 | New_Occurrence_Of (RTE (RE_Task_Entry_Index), Loc), |
55868293 | 3594 | Expression => Make_Identifier (Loc, Name_uI)), |
76a1c25b | 3595 | |
3596 | Make_Identifier (Loc, Name_uP), -- parameter block | |
3597 | Make_Identifier (Loc, Name_uD), -- delay | |
3598 | Make_Identifier (Loc, Name_uM), -- delay mode | |
3599 | Make_Identifier (Loc, Name_uF)))); -- status flag | |
ee6ba406 | 3600 | end if; |
7c949aad | 3601 | |
3602 | else | |
a053db0d | 3603 | -- Initialize out parameters |
7c949aad | 3604 | |
a053db0d | 3605 | Append_To (Stmts, |
3606 | Make_Assignment_Statement (Loc, | |
aabafdc2 | 3607 | Name => Make_Identifier (Loc, Name_uF), |
83c6c069 | 3608 | Expression => New_Occurrence_Of (Standard_False, Loc))); |
a053db0d | 3609 | Append_To (Stmts, |
3610 | Make_Assignment_Statement (Loc, | |
aabafdc2 | 3611 | Name => Make_Identifier (Loc, Name_uC), |
83c6c069 | 3612 | Expression => New_Occurrence_Of (RTE (RE_POK_Function), Loc))); |
76a1c25b | 3613 | end if; |
3614 | ||
3615 | return | |
3616 | Make_Subprogram_Body (Loc, | |
aabafdc2 | 3617 | Specification => Make_Disp_Timed_Select_Spec (Typ), |
3618 | Declarations => Decls, | |
76a1c25b | 3619 | Handled_Statement_Sequence => |
3620 | Make_Handled_Sequence_Of_Statements (Loc, Stmts)); | |
3621 | end Make_Disp_Timed_Select_Body; | |
3622 | ||
3623 | --------------------------------- | |
3624 | -- Make_Disp_Timed_Select_Spec -- | |
3625 | --------------------------------- | |
3626 | ||
3627 | function Make_Disp_Timed_Select_Spec | |
3628 | (Typ : Entity_Id) return Node_Id | |
3629 | is | |
3630 | Loc : constant Source_Ptr := Sloc (Typ); | |
3631 | Def_Id : constant Node_Id := | |
3632 | Make_Defining_Identifier (Loc, | |
3633 | Name_uDisp_Timed_Select); | |
3634 | Params : constant List_Id := New_List; | |
ee6ba406 | 3635 | |
76a1c25b | 3636 | begin |
68f95949 | 3637 | pragma Assert (not Restriction_Active (No_Dispatching_Calls)); |
3638 | ||
725a69d2 | 3639 | -- T : in out Typ; -- Object parameter |
3640 | -- S : Integer; -- Primitive operation slot | |
3641 | -- P : Address; -- Wrapped parameters | |
3642 | -- D : Duration; -- Delay | |
3643 | -- M : Integer; -- Delay Mode | |
3644 | -- C : out Prim_Op_Kind; -- Call kind | |
3645 | -- F : out Boolean; -- Status flag | |
76a1c25b | 3646 | |
725a69d2 | 3647 | Append_List_To (Params, New_List ( |
3648 | ||
3649 | Make_Parameter_Specification (Loc, | |
3650 | Defining_Identifier => | |
3651 | Make_Defining_Identifier (Loc, Name_uT), | |
3652 | Parameter_Type => | |
83c6c069 | 3653 | New_Occurrence_Of (Typ, Loc), |
725a69d2 | 3654 | In_Present => True, |
3655 | Out_Present => True), | |
3656 | ||
3657 | Make_Parameter_Specification (Loc, | |
3658 | Defining_Identifier => | |
3659 | Make_Defining_Identifier (Loc, Name_uS), | |
3660 | Parameter_Type => | |
83c6c069 | 3661 | New_Occurrence_Of (Standard_Integer, Loc)), |
725a69d2 | 3662 | |
3663 | Make_Parameter_Specification (Loc, | |
3664 | Defining_Identifier => | |
3665 | Make_Defining_Identifier (Loc, Name_uP), | |
3666 | Parameter_Type => | |
83c6c069 | 3667 | New_Occurrence_Of (RTE (RE_Address), Loc)), |
76a1c25b | 3668 | |
76a1c25b | 3669 | Make_Parameter_Specification (Loc, |
3670 | Defining_Identifier => | |
3671 | Make_Defining_Identifier (Loc, Name_uD), | |
3672 | Parameter_Type => | |
83c6c069 | 3673 | New_Occurrence_Of (Standard_Duration, Loc)), |
76a1c25b | 3674 | |
76a1c25b | 3675 | Make_Parameter_Specification (Loc, |
3676 | Defining_Identifier => | |
3677 | Make_Defining_Identifier (Loc, Name_uM), | |
3678 | Parameter_Type => | |
83c6c069 | 3679 | New_Occurrence_Of (Standard_Integer, Loc)), |
ee6ba406 | 3680 | |
725a69d2 | 3681 | Make_Parameter_Specification (Loc, |
3682 | Defining_Identifier => | |
3683 | Make_Defining_Identifier (Loc, Name_uC), | |
3684 | Parameter_Type => | |
83c6c069 | 3685 | New_Occurrence_Of (RTE (RE_Prim_Op_Kind), Loc), |
725a69d2 | 3686 | Out_Present => True))); |
ee6ba406 | 3687 | |
725a69d2 | 3688 | Append_To (Params, |
3689 | Make_Parameter_Specification (Loc, | |
3690 | Defining_Identifier => | |
3691 | Make_Defining_Identifier (Loc, Name_uF), | |
3692 | Parameter_Type => | |
83c6c069 | 3693 | New_Occurrence_Of (Standard_Boolean, Loc), |
725a69d2 | 3694 | Out_Present => True)); |
ee6ba406 | 3695 | |
76a1c25b | 3696 | return |
3697 | Make_Procedure_Specification (Loc, | |
3698 | Defining_Unit_Name => Def_Id, | |
3699 | Parameter_Specifications => Params); | |
3700 | end Make_Disp_Timed_Select_Spec; | |
ee6ba406 | 3701 | |
76a1c25b | 3702 | ------------- |
3703 | -- Make_DT -- | |
3704 | ------------- | |
ee6ba406 | 3705 | |
725a69d2 | 3706 | -- The frontend supports two models for expanding dispatch tables |
3707 | -- associated with library-level defined tagged types: statically | |
3708 | -- and non-statically allocated dispatch tables. In the former case | |
3709 | -- the object containing the dispatch table is constant and it is | |
3710 | -- initialized by means of a positional aggregate. In the latter case, | |
3711 | -- the object containing the dispatch table is a variable which is | |
3712 | -- initialized by means of assignments. | |
3713 | ||
3714 | -- In case of locally defined tagged types, the object containing the | |
3715 | -- object containing the dispatch table is always a variable (instead | |
3716 | -- of a constant). This is currently required to give support to late | |
3717 | -- overriding of primitives. For example: | |
3718 | ||
3719 | -- procedure Example is | |
3720 | -- package Pkg is | |
3721 | -- type T1 is tagged null record; | |
3722 | -- procedure Prim (O : T1); | |
3723 | -- end Pkg; | |
3724 | ||
3725 | -- type T2 is new Pkg.T1 with null record; | |
3726 | -- procedure Prim (X : T2) is -- late overriding | |
3727 | -- begin | |
3728 | -- ... | |
3729 | -- ... | |
3730 | -- end; | |
952af0b9 | 3731 | |
17e14451 | 3732 | function Make_DT (Typ : Entity_Id; N : Node_Id := Empty) return List_Id is |
3733 | Loc : constant Source_Ptr := Sloc (Typ); | |
3734 | ||
725a69d2 | 3735 | Max_Predef_Prims : constant Int := |
3736 | UI_To_Int | |
3737 | (Intval | |
3738 | (Expression | |
17e14451 | 3739 | (Parent (RTE (RE_Max_Predef_Prims))))); |
3740 | ||
cc60bd16 | 3741 | DT_Decl : constant Elist_Id := New_Elmt_List; |
3742 | DT_Aggr : constant Elist_Id := New_Elmt_List; | |
3743 | -- Entities marked with attribute Is_Dispatch_Table_Entity | |
3744 | ||
349db231 | 3745 | procedure Check_Premature_Freezing |
3746 | (Subp : Entity_Id; | |
3747 | Tagged_Type : Entity_Id; | |
3748 | Typ : Entity_Id); | |
17e14451 | 3749 | -- Verify that all non-tagged types in the profile of a subprogram |
3750 | -- are frozen at the point the subprogram is frozen. This enforces | |
3751 | -- the rule on RM 13.14 (14) as modified by AI05-019. At the point a | |
3752 | -- subprogram is frozen, enough must be known about it to build the | |
3753 | -- activation record for it, which requires at least that the size of | |
3754 | -- all parameters be known. Controlling arguments are by-reference, | |
3755 | -- and therefore the rule only applies to non-tagged types. | |
3756 | -- Typical violation of the rule involves an object declaration that | |
3757 | -- freezes a tagged type, when one of its primitive operations has a | |
3758 | -- type in its profile whose full view has not been analyzed yet. | |
349db231 | 3759 | -- More complex cases involve composite types that have one private |
3760 | -- unfrozen subcomponent. | |
725a69d2 | 3761 | |
f301a57b | 3762 | procedure Export_DT (Typ : Entity_Id; DT : Entity_Id; Index : Nat := 0); |
3763 | -- Export the dispatch table DT of tagged type Typ. Required to generate | |
3764 | -- forward references and statically allocate the table. For primary | |
3765 | -- dispatch tables Index is 0; for secondary dispatch tables the value | |
3766 | -- of index must match the Suffix_Index value assigned to the table by | |
3767 | -- Make_Tags when generating its unique external name, and it is used to | |
3768 | -- retrieve from the Dispatch_Table_Wrappers list associated with Typ | |
3769 | -- the external name generated by Import_DT. | |
24971415 | 3770 | |
725a69d2 | 3771 | procedure Make_Secondary_DT |
acf97c11 | 3772 | (Typ : Entity_Id; |
3773 | Iface : Entity_Id; | |
f301a57b | 3774 | Suffix_Index : Int; |
acf97c11 | 3775 | Num_Iface_Prims : Nat; |
3776 | Iface_DT_Ptr : Entity_Id; | |
3777 | Predef_Prims_Ptr : Entity_Id; | |
3778 | Build_Thunks : Boolean; | |
3779 | Result : List_Id); | |
cdb1c38f | 3780 | -- Ada 2005 (AI-251): Expand the declarations for a Secondary Dispatch |
3781 | -- Table of Typ associated with Iface. Each abstract interface of Typ | |
3782 | -- has two secondary dispatch tables: one containing pointers to thunks | |
3783 | -- and another containing pointers to the primitives covering the | |
3784 | -- interface primitives. The former secondary table is generated when | |
3785 | -- Build_Thunks is True, and provides common support for dispatching | |
3786 | -- calls through interface types; the latter secondary table is | |
3787 | -- generated when Build_Thunks is False, and provides support for | |
3788 | -- Generic Dispatching Constructors that dispatch calls through | |
278c67dc | 3789 | -- interface types. When constructing this latter table the value of |
3790 | -- Suffix_Index is -1 to indicate that there is no need to export such | |
3791 | -- table when building statically allocated dispatch tables; a positive | |
3792 | -- value of Suffix_Index must match the Suffix_Index value assigned to | |
3793 | -- this secondary dispatch table by Make_Tags when its unique external | |
3794 | -- name was generated. | |
9dfe12ae | 3795 | |
17e14451 | 3796 | ------------------------------ |
3797 | -- Check_Premature_Freezing -- | |
3798 | ------------------------------ | |
3799 | ||
349db231 | 3800 | procedure Check_Premature_Freezing |
3801 | (Subp : Entity_Id; | |
3802 | Tagged_Type : Entity_Id; | |
3803 | Typ : Entity_Id) | |
3804 | is | |
3805 | Comp : Entity_Id; | |
aada9bb5 | 3806 | |
3807 | function Is_Actual_For_Formal_Incomplete_Type | |
3808 | (T : Entity_Id) return Boolean; | |
65a805b2 | 3809 | -- In Ada 2012, if a nested generic has an incomplete formal type, |
3810 | -- the actual may be (and usually is) a private type whose completion | |
5f8e1c78 | 3811 | -- appears later. It is safe to build the dispatch table in this |
3812 | -- case, gigi will have full views available. | |
3813 | ||
3814 | ------------------------------------------ | |
3815 | -- Is_Actual_For_Formal_Incomplete_Type -- | |
3816 | ------------------------------------------ | |
3817 | ||
aada9bb5 | 3818 | function Is_Actual_For_Formal_Incomplete_Type |
3819 | (T : Entity_Id) return Boolean | |
5f8e1c78 | 3820 | is |
3821 | Gen_Par : Entity_Id; | |
3822 | F : Node_Id; | |
aada9bb5 | 3823 | |
5f8e1c78 | 3824 | begin |
3825 | if not Is_Generic_Instance (Current_Scope) | |
3826 | or else not Used_As_Generic_Actual (T) | |
3827 | then | |
3828 | return False; | |
3829 | ||
3830 | else | |
3831 | Gen_Par := Generic_Parent (Parent (Current_Scope)); | |
3832 | end if; | |
3833 | ||
3834 | F := | |
3835 | First | |
3836 | (Generic_Formal_Declarations | |
3837 | (Unit_Declaration_Node (Gen_Par))); | |
3838 | while Present (F) loop | |
3839 | if Ekind (Defining_Identifier (F)) = E_Incomplete_Type then | |
3840 | return True; | |
3841 | end if; | |
3842 | ||
3843 | Next (F); | |
3844 | end loop; | |
3845 | ||
3846 | return False; | |
3847 | end Is_Actual_For_Formal_Incomplete_Type; | |
278c67dc | 3848 | |
aada9bb5 | 3849 | -- Start of processing for Check_Premature_Freezing |
3850 | ||
17e14451 | 3851 | begin |
496b8337 | 3852 | -- Note that if the type is a (subtype of) a generic actual, the |
3853 | -- actual will have been frozen by the instantiation. | |
3854 | ||
17e14451 | 3855 | if Present (N) |
349db231 | 3856 | and then Is_Private_Type (Typ) |
17e14451 | 3857 | and then No (Full_View (Typ)) |
3858 | and then not Is_Generic_Type (Typ) | |
3859 | and then not Is_Tagged_Type (Typ) | |
3860 | and then not Is_Frozen (Typ) | |
496b8337 | 3861 | and then not Is_Generic_Actual_Type (Typ) |
17e14451 | 3862 | then |
3863 | Error_Msg_Sloc := Sloc (Subp); | |
503f7fd3 | 3864 | Error_Msg_NE |
17e14451 | 3865 | ("declaration must appear after completion of type &", N, Typ); |
3866 | Error_Msg_NE | |
3867 | ("\which is an untagged type in the profile of" | |
349db231 | 3868 | & " primitive operation & declared#", N, Subp); |
3869 | ||
3870 | else | |
3871 | Comp := Private_Component (Typ); | |
3872 | ||
3873 | if not Is_Tagged_Type (Typ) | |
3874 | and then Present (Comp) | |
3875 | and then not Is_Frozen (Comp) | |
5f8e1c78 | 3876 | and then |
aada9bb5 | 3877 | not Is_Actual_For_Formal_Incomplete_Type (Comp) |
349db231 | 3878 | then |
3879 | Error_Msg_Sloc := Sloc (Subp); | |
3880 | Error_Msg_Node_2 := Subp; | |
3881 | Error_Msg_Name_1 := Chars (Tagged_Type); | |
3882 | Error_Msg_NE | |
3883 | ("declaration must appear after completion of type &", | |
3884 | N, Comp); | |
3885 | Error_Msg_NE | |
3886 | ("\which is a component of untagged type& in the profile of" | |
3887 | & " primitive & of type % that is frozen by the declaration ", | |
3888 | N, Typ); | |
3889 | end if; | |
17e14451 | 3890 | end if; |
3891 | end Check_Premature_Freezing; | |
3892 | ||
24971415 | 3893 | --------------- |
3894 | -- Export_DT -- | |
3895 | --------------- | |
3896 | ||
f301a57b | 3897 | procedure Export_DT (Typ : Entity_Id; DT : Entity_Id; Index : Nat := 0) |
3898 | is | |
3899 | Count : Nat; | |
3900 | Elmt : Elmt_Id; | |
3901 | ||
24971415 | 3902 | begin |
3903 | Set_Is_Statically_Allocated (DT); | |
3904 | Set_Is_True_Constant (DT); | |
3905 | Set_Is_Exported (DT); | |
3906 | ||
f301a57b | 3907 | Count := 0; |
3908 | Elmt := First_Elmt (Dispatch_Table_Wrappers (Typ)); | |
3909 | while Count /= Index loop | |
3910 | Next_Elmt (Elmt); | |
3911 | Count := Count + 1; | |
3912 | end loop; | |
3913 | ||
3914 | pragma Assert (Related_Type (Node (Elmt)) = Typ); | |
3915 | ||
f92da234 | 3916 | Get_External_Name (Node (Elmt)); |
24971415 | 3917 | Set_Interface_Name (DT, |
3918 | Make_String_Literal (Loc, | |
3919 | Strval => String_From_Name_Buffer)); | |
3920 | ||
3921 | -- Ensure proper Sprint output of this implicit importation | |
3922 | ||
3923 | Set_Is_Internal (DT); | |
3924 | Set_Is_Public (DT); | |
3925 | end Export_DT; | |
3926 | ||
725a69d2 | 3927 | ----------------------- |
3928 | -- Make_Secondary_DT -- | |
3929 | ----------------------- | |
ee6ba406 | 3930 | |
725a69d2 | 3931 | procedure Make_Secondary_DT |
acf97c11 | 3932 | (Typ : Entity_Id; |
3933 | Iface : Entity_Id; | |
f301a57b | 3934 | Suffix_Index : Int; |
acf97c11 | 3935 | Num_Iface_Prims : Nat; |
3936 | Iface_DT_Ptr : Entity_Id; | |
3937 | Predef_Prims_Ptr : Entity_Id; | |
3938 | Build_Thunks : Boolean; | |
3939 | Result : List_Id) | |
725a69d2 | 3940 | is |
3941 | Loc : constant Source_Ptr := Sloc (Typ); | |
f301a57b | 3942 | Exporting_Table : constant Boolean := |
3943 | Building_Static_DT (Typ) | |
3944 | and then Suffix_Index > 0; | |
ec97ce79 | 3945 | Iface_DT : constant Entity_Id := Make_Temporary (Loc, 'T'); |
3946 | Predef_Prims : constant Entity_Id := Make_Temporary (Loc, 'R'); | |
725a69d2 | 3947 | DT_Constr_List : List_Id; |
3948 | DT_Aggr_List : List_Id; | |
3949 | Empty_DT : Boolean := False; | |
3950 | Nb_Predef_Prims : Nat := 0; | |
3951 | Nb_Prim : Nat; | |
3952 | New_Node : Node_Id; | |
3953 | OSD : Entity_Id; | |
3954 | OSD_Aggr_List : List_Id; | |
3955 | Pos : Nat; | |
3956 | Prim : Entity_Id; | |
3957 | Prim_Elmt : Elmt_Id; | |
3958 | Prim_Ops_Aggr_List : List_Id; | |
343d35dc | 3959 | |
725a69d2 | 3960 | begin |
17e14451 | 3961 | -- Handle cases in which we do not generate statically allocated |
3962 | -- dispatch tables. | |
343d35dc | 3963 | |
24971415 | 3964 | if not Building_Static_DT (Typ) then |
725a69d2 | 3965 | Set_Ekind (Predef_Prims, E_Variable); |
725a69d2 | 3966 | Set_Ekind (Iface_DT, E_Variable); |
343d35dc | 3967 | |
725a69d2 | 3968 | -- Statically allocated dispatch tables and related entities are |
3969 | -- constants. | |
343d35dc | 3970 | |
725a69d2 | 3971 | else |
3972 | Set_Ekind (Predef_Prims, E_Constant); | |
3973 | Set_Is_Statically_Allocated (Predef_Prims); | |
3974 | Set_Is_True_Constant (Predef_Prims); | |
343d35dc | 3975 | |
725a69d2 | 3976 | Set_Ekind (Iface_DT, E_Constant); |
3977 | Set_Is_Statically_Allocated (Iface_DT); | |
3978 | Set_Is_True_Constant (Iface_DT); | |
343d35dc | 3979 | end if; |
3980 | ||
f301a57b | 3981 | -- Calculate the number of slots of the dispatch table. If the number |
3982 | -- of primitives of Typ is 0 we reserve a dummy single entry for its | |
0c826ed4 | 3983 | -- DT because at run time the pointer to this dummy entry will be |
f301a57b | 3984 | -- used as the tag. |
68f95949 | 3985 | |
cdb1c38f | 3986 | if Num_Iface_Prims = 0 then |
725a69d2 | 3987 | Empty_DT := True; |
3988 | Nb_Prim := 1; | |
cdb1c38f | 3989 | else |
3990 | Nb_Prim := Num_Iface_Prims; | |
725a69d2 | 3991 | end if; |
76a1c25b | 3992 | |
725a69d2 | 3993 | -- Generate: |
952af0b9 | 3994 | |
725a69d2 | 3995 | -- Predef_Prims : Address_Array (1 .. Default_Prim_Ops_Count) := |
3996 | -- (predef-prim-op-thunk-1'address, | |
3997 | -- predef-prim-op-thunk-2'address, | |
3998 | -- ... | |
3999 | -- predef-prim-op-thunk-n'address); | |
4000 | -- for Predef_Prims'Alignment use Address'Alignment | |
952af0b9 | 4001 | |
725a69d2 | 4002 | -- Stage 1: Calculate the number of predefined primitives |
76a1c25b | 4003 | |
24971415 | 4004 | if not Building_Static_DT (Typ) then |
725a69d2 | 4005 | Nb_Predef_Prims := Max_Predef_Prims; |
4006 | else | |
4007 | Prim_Elmt := First_Elmt (Primitive_Operations (Typ)); | |
4008 | while Present (Prim_Elmt) loop | |
4009 | Prim := Node (Prim_Elmt); | |
aad6babd | 4010 | |
725a69d2 | 4011 | if Is_Predefined_Dispatching_Operation (Prim) |
4012 | and then not Is_Abstract_Subprogram (Prim) | |
4013 | then | |
4014 | Pos := UI_To_Int (DT_Position (Prim)); | |
aad6babd | 4015 | |
725a69d2 | 4016 | if Pos > Nb_Predef_Prims then |
4017 | Nb_Predef_Prims := Pos; | |
4018 | end if; | |
4019 | end if; | |
aad6babd | 4020 | |
725a69d2 | 4021 | Next_Elmt (Prim_Elmt); |
4022 | end loop; | |
4023 | end if; | |
aad6babd | 4024 | |
725a69d2 | 4025 | -- Stage 2: Create the thunks associated with the predefined |
4026 | -- primitives and save their entity to fill the aggregate. | |
ee6ba406 | 4027 | |
725a69d2 | 4028 | declare |
4029 | Prim_Table : array (Nat range 1 .. Nb_Predef_Prims) of Entity_Id; | |
cc60bd16 | 4030 | Decl : Node_Id; |
725a69d2 | 4031 | Thunk_Id : Entity_Id; |
4032 | Thunk_Code : Node_Id; | |
aad6babd | 4033 | |
725a69d2 | 4034 | begin |
4035 | Prim_Ops_Aggr_List := New_List; | |
4036 | Prim_Table := (others => Empty); | |
aad6babd | 4037 | |
cdb1c38f | 4038 | if Building_Static_DT (Typ) then |
4039 | Prim_Elmt := First_Elmt (Primitive_Operations (Typ)); | |
4040 | while Present (Prim_Elmt) loop | |
4041 | Prim := Node (Prim_Elmt); | |
aad6babd | 4042 | |
cdb1c38f | 4043 | if Is_Predefined_Dispatching_Operation (Prim) |
4044 | and then not Is_Abstract_Subprogram (Prim) | |
3f8cf2d2 | 4045 | and then not Is_Eliminated (Prim) |
cdb1c38f | 4046 | and then not Present (Prim_Table |
4047 | (UI_To_Int (DT_Position (Prim)))) | |
4048 | then | |
4049 | if not Build_Thunks then | |
4050 | Prim_Table (UI_To_Int (DT_Position (Prim))) := | |
4051 | Alias (Prim); | |
aad6babd | 4052 | |
cdb1c38f | 4053 | else |
fc2907f6 | 4054 | Expand_Interface_Thunk |
4055 | (Ultimate_Alias (Prim), Thunk_Id, Thunk_Code); | |
aad6babd | 4056 | |
cdb1c38f | 4057 | if Present (Thunk_Id) then |
4058 | Append_To (Result, Thunk_Code); | |
4059 | Prim_Table (UI_To_Int (DT_Position (Prim))) | |
4060 | := Thunk_Id; | |
4061 | end if; | |
4062 | end if; | |
725a69d2 | 4063 | end if; |
aad6babd | 4064 | |
cdb1c38f | 4065 | Next_Elmt (Prim_Elmt); |
4066 | end loop; | |
4067 | end if; | |
aad6babd | 4068 | |
725a69d2 | 4069 | for J in Prim_Table'Range loop |
4070 | if Present (Prim_Table (J)) then | |
4071 | New_Node := | |
cc60bd16 | 4072 | Unchecked_Convert_To (RTE (RE_Prim_Ptr), |
acf97c11 | 4073 | Make_Attribute_Reference (Loc, |
83c6c069 | 4074 | Prefix => New_Occurrence_Of (Prim_Table (J), Loc), |
acf97c11 | 4075 | Attribute_Name => Name_Unrestricted_Access)); |
725a69d2 | 4076 | else |
cc60bd16 | 4077 | New_Node := Make_Null (Loc); |
725a69d2 | 4078 | end if; |
952af0b9 | 4079 | |
725a69d2 | 4080 | Append_To (Prim_Ops_Aggr_List, New_Node); |
4081 | end loop; | |
952af0b9 | 4082 | |
cc60bd16 | 4083 | New_Node := |
4084 | Make_Aggregate (Loc, | |
4085 | Expressions => Prim_Ops_Aggr_List); | |
4086 | ||
4087 | -- Remember aggregates initializing dispatch tables | |
4088 | ||
4089 | Append_Elmt (New_Node, DT_Aggr); | |
4090 | ||
4091 | Decl := | |
4092 | Make_Subtype_Declaration (Loc, | |
ec97ce79 | 4093 | Defining_Identifier => Make_Temporary (Loc, 'S'), |
4094 | Subtype_Indication => | |
83c6c069 | 4095 | New_Occurrence_Of (RTE (RE_Address_Array), Loc)); |
cc60bd16 | 4096 | |
4097 | Append_To (Result, Decl); | |
4098 | ||
725a69d2 | 4099 | Append_To (Result, |
4100 | Make_Object_Declaration (Loc, | |
4101 | Defining_Identifier => Predef_Prims, | |
24971415 | 4102 | Constant_Present => Building_Static_DT (Typ), |
725a69d2 | 4103 | Aliased_Present => True, |
83c6c069 | 4104 | Object_Definition => New_Occurrence_Of |
cc60bd16 | 4105 | (Defining_Identifier (Decl), Loc), |
4106 | Expression => New_Node)); | |
aad6babd | 4107 | |
725a69d2 | 4108 | Append_To (Result, |
4109 | Make_Attribute_Definition_Clause (Loc, | |
83c6c069 | 4110 | Name => New_Occurrence_Of (Predef_Prims, Loc), |
725a69d2 | 4111 | Chars => Name_Alignment, |
4112 | Expression => | |
4113 | Make_Attribute_Reference (Loc, | |
4114 | Prefix => | |
83c6c069 | 4115 | New_Occurrence_Of (RTE (RE_Integer_Address), Loc), |
725a69d2 | 4116 | Attribute_Name => Name_Alignment))); |
4117 | end; | |
aad6babd | 4118 | |
725a69d2 | 4119 | -- Generate |
76a1c25b | 4120 | |
725a69d2 | 4121 | -- OSD : Ada.Tags.Object_Specific_Data (Nb_Prims) := |
4122 | -- (OSD_Table => (1 => <value>, | |
4123 | -- ... | |
4124 | -- N => <value>)); | |
76a1c25b | 4125 | |
725a69d2 | 4126 | -- Iface_DT : Dispatch_Table (Nb_Prims) := |
4127 | -- ([ Signature => <sig-value> ], | |
4128 | -- Tag_Kind => <tag_kind-value>, | |
4129 | -- Predef_Prims => Predef_Prims'Address, | |
4130 | -- Offset_To_Top => 0, | |
4131 | -- OSD => OSD'Address, | |
4132 | -- Prims_Ptr => (prim-op-1'address, | |
4133 | -- prim-op-2'address, | |
4134 | -- ... | |
4135 | -- prim-op-n'address)); | |
f301a57b | 4136 | -- for Iface_DT'Alignment use Address'Alignment; |
76a1c25b | 4137 | |
725a69d2 | 4138 | -- Stage 3: Initialize the discriminant and the record components |
aad6babd | 4139 | |
725a69d2 | 4140 | DT_Constr_List := New_List; |
4141 | DT_Aggr_List := New_List; | |
343d35dc | 4142 | |
4c5d0f70 | 4143 | -- Nb_Prim |
343d35dc | 4144 | |
4c5d0f70 | 4145 | Append_To (DT_Constr_List, Make_Integer_Literal (Loc, Nb_Prim)); |
4146 | Append_To (DT_Aggr_List, Make_Integer_Literal (Loc, Nb_Prim)); | |
343d35dc | 4147 | |
725a69d2 | 4148 | -- Signature |
343d35dc | 4149 | |
725a69d2 | 4150 | if RTE_Record_Component_Available (RE_Signature) then |
4151 | Append_To (DT_Aggr_List, | |
83c6c069 | 4152 | New_Occurrence_Of (RTE (RE_Secondary_DT), Loc)); |
725a69d2 | 4153 | end if; |
343d35dc | 4154 | |
725a69d2 | 4155 | -- Tag_Kind |
343d35dc | 4156 | |
725a69d2 | 4157 | if RTE_Record_Component_Available (RE_Tag_Kind) then |
4158 | Append_To (DT_Aggr_List, Tagged_Kind (Typ)); | |
4159 | end if; | |
aad6babd | 4160 | |
725a69d2 | 4161 | -- Predef_Prims |
aad6babd | 4162 | |
725a69d2 | 4163 | Append_To (DT_Aggr_List, |
4164 | Make_Attribute_Reference (Loc, | |
83c6c069 | 4165 | Prefix => New_Occurrence_Of (Predef_Prims, Loc), |
725a69d2 | 4166 | Attribute_Name => Name_Address)); |
aad6babd | 4167 | |
725a69d2 | 4168 | -- Note: The correct value of Offset_To_Top will be set by the init |
4169 | -- subprogram | |
aad6babd | 4170 | |
725a69d2 | 4171 | Append_To (DT_Aggr_List, Make_Integer_Literal (Loc, 0)); |
aad6babd | 4172 | |
725a69d2 | 4173 | -- Generate the Object Specific Data table required to dispatch calls |
4174 | -- through synchronized interfaces. | |
aad6babd | 4175 | |
725a69d2 | 4176 | if Empty_DT |
4177 | or else Is_Abstract_Type (Typ) | |
4178 | or else Is_Controlled (Typ) | |
4179 | or else Restriction_Active (No_Dispatching_Calls) | |
4180 | or else not Is_Limited_Type (Typ) | |
a652dd51 | 4181 | or else not Has_Interfaces (Typ) |
cdb1c38f | 4182 | or else not Build_Thunks |
38d2fa31 | 4183 | or else not RTE_Record_Component_Available (RE_OSD_Table) |
725a69d2 | 4184 | then |
4185 | -- No OSD table required | |
ee6ba406 | 4186 | |
725a69d2 | 4187 | Append_To (DT_Aggr_List, |
83c6c069 | 4188 | New_Occurrence_Of (RTE (RE_Null_Address), Loc)); |
d62940bf | 4189 | |
725a69d2 | 4190 | else |
4191 | OSD_Aggr_List := New_List; | |
d62940bf | 4192 | |
725a69d2 | 4193 | declare |
4194 | Prim_Table : array (Nat range 1 .. Nb_Prim) of Entity_Id; | |
4195 | Prim : Entity_Id; | |
4196 | Prim_Alias : Entity_Id; | |
4197 | Prim_Elmt : Elmt_Id; | |
4198 | E : Entity_Id; | |
4199 | Count : Nat := 0; | |
4200 | Pos : Nat; | |
d62940bf | 4201 | |
725a69d2 | 4202 | begin |
4203 | Prim_Table := (others => Empty); | |
4204 | Prim_Alias := Empty; | |
d62940bf | 4205 | |
725a69d2 | 4206 | Prim_Elmt := First_Elmt (Primitive_Operations (Typ)); |
4207 | while Present (Prim_Elmt) loop | |
4208 | Prim := Node (Prim_Elmt); | |
d62940bf | 4209 | |
a652dd51 | 4210 | if Present (Interface_Alias (Prim)) |
725a69d2 | 4211 | and then Find_Dispatching_Type |
a652dd51 | 4212 | (Interface_Alias (Prim)) = Iface |
725a69d2 | 4213 | then |
a652dd51 | 4214 | Prim_Alias := Interface_Alias (Prim); |
fc2907f6 | 4215 | E := Ultimate_Alias (Prim); |
725a69d2 | 4216 | Pos := UI_To_Int (DT_Position (Prim_Alias)); |
68f95949 | 4217 | |
725a69d2 | 4218 | if Present (Prim_Table (Pos)) then |
4219 | pragma Assert (Prim_Table (Pos) = E); | |
4220 | null; | |
68f95949 | 4221 | |
725a69d2 | 4222 | else |
4223 | Prim_Table (Pos) := E; | |
4224 | ||
4225 | Append_To (OSD_Aggr_List, | |
4226 | Make_Component_Association (Loc, | |
4227 | Choices => New_List ( | |
4228 | Make_Integer_Literal (Loc, | |
4229 | DT_Position (Prim_Alias))), | |
4230 | Expression => | |
4231 | Make_Integer_Literal (Loc, | |
4232 | DT_Position (Alias (Prim))))); | |
4233 | ||
4234 | Count := Count + 1; | |
4235 | end if; | |
4236 | end if; | |
4237 | ||
4238 | Next_Elmt (Prim_Elmt); | |
4239 | end loop; | |
4240 | pragma Assert (Count = Nb_Prim); | |
4241 | end; | |
4242 | ||
ec97ce79 | 4243 | OSD := Make_Temporary (Loc, 'I'); |
725a69d2 | 4244 | |
4245 | Append_To (Result, | |
4246 | Make_Object_Declaration (Loc, | |
4247 | Defining_Identifier => OSD, | |
4248 | Object_Definition => | |
4249 | Make_Subtype_Indication (Loc, | |
4250 | Subtype_Mark => | |
83c6c069 | 4251 | New_Occurrence_Of (RTE (RE_Object_Specific_Data), Loc), |
725a69d2 | 4252 | Constraint => |
4253 | Make_Index_Or_Discriminant_Constraint (Loc, | |
4254 | Constraints => New_List ( | |
4255 | Make_Integer_Literal (Loc, Nb_Prim)))), | |
725a69d2 | 4256 | |
ec97ce79 | 4257 | Expression => |
4258 | Make_Aggregate (Loc, | |
4259 | Component_Associations => New_List ( | |
4260 | Make_Component_Association (Loc, | |
4261 | Choices => New_List ( | |
4262 | New_Occurrence_Of | |
4263 | (RTE_Record_Component (RE_OSD_Num_Prims), Loc)), | |
4264 | Expression => | |
4265 | Make_Integer_Literal (Loc, Nb_Prim)), | |
4266 | ||
4267 | Make_Component_Association (Loc, | |
4268 | Choices => New_List ( | |
4269 | New_Occurrence_Of | |
4270 | (RTE_Record_Component (RE_OSD_Table), Loc)), | |
4271 | Expression => Make_Aggregate (Loc, | |
4272 | Component_Associations => OSD_Aggr_List)))))); | |
725a69d2 | 4273 | |
17e14451 | 4274 | Append_To (Result, |
4275 | Make_Attribute_Definition_Clause (Loc, | |
83c6c069 | 4276 | Name => New_Occurrence_Of (OSD, Loc), |
17e14451 | 4277 | Chars => Name_Alignment, |
4278 | Expression => | |
4279 | Make_Attribute_Reference (Loc, | |
4280 | Prefix => | |
83c6c069 | 4281 | New_Occurrence_Of (RTE (RE_Integer_Address), Loc), |
17e14451 | 4282 | Attribute_Name => Name_Alignment))); |
4283 | ||
725a69d2 | 4284 | -- In secondary dispatch tables the Typeinfo component contains |
4285 | -- the address of the Object Specific Data (see a-tags.ads) | |
4286 | ||
4287 | Append_To (DT_Aggr_List, | |
4288 | Make_Attribute_Reference (Loc, | |
83c6c069 | 4289 | Prefix => New_Occurrence_Of (OSD, Loc), |
725a69d2 | 4290 | Attribute_Name => Name_Address)); |
4291 | end if; | |
4292 | ||
4293 | -- Initialize the table of primitive operations | |
4294 | ||
4295 | Prim_Ops_Aggr_List := New_List; | |
4296 | ||
4297 | if Empty_DT then | |
cc60bd16 | 4298 | Append_To (Prim_Ops_Aggr_List, Make_Null (Loc)); |
725a69d2 | 4299 | |
4300 | elsif Is_Abstract_Type (Typ) | |
9a479e51 | 4301 | or else not Building_Static_DT (Typ) |
725a69d2 | 4302 | then |
4303 | for J in 1 .. Nb_Prim loop | |
cc60bd16 | 4304 | Append_To (Prim_Ops_Aggr_List, Make_Null (Loc)); |
725a69d2 | 4305 | end loop; |
4306 | ||
4307 | else | |
4308 | declare | |
d00681a7 | 4309 | CPP_Nb_Prims : constant Nat := CPP_Num_Prims (Typ); |
4310 | E : Entity_Id; | |
4311 | Prim_Pos : Nat; | |
4312 | Prim_Table : array (Nat range 1 .. Nb_Prim) of Entity_Id; | |
4313 | Thunk_Code : Node_Id; | |
4314 | Thunk_Id : Entity_Id; | |
725a69d2 | 4315 | |
4316 | begin | |
4317 | Prim_Table := (others => Empty); | |
4318 | ||
4319 | Prim_Elmt := First_Elmt (Primitive_Operations (Typ)); | |
4320 | while Present (Prim_Elmt) loop | |
d00681a7 | 4321 | Prim := Node (Prim_Elmt); |
4322 | E := Ultimate_Alias (Prim); | |
4323 | Prim_Pos := UI_To_Int (DT_Position (E)); | |
725a69d2 | 4324 | |
d00681a7 | 4325 | -- Do not reference predefined primitives because they are |
4326 | -- located in a separate dispatch table; skip abstract and | |
4327 | -- eliminated primitives; skip primitives located in the C++ | |
4328 | -- part of the dispatch table because their slot is set by | |
4329 | -- the IC routine. | |
3f8cf2d2 | 4330 | |
725a69d2 | 4331 | if not Is_Predefined_Dispatching_Operation (Prim) |
a652dd51 | 4332 | and then Present (Interface_Alias (Prim)) |
725a69d2 | 4333 | and then not Is_Abstract_Subprogram (Alias (Prim)) |
3f8cf2d2 | 4334 | and then not Is_Eliminated (Alias (Prim)) |
d00681a7 | 4335 | and then (not Is_CPP_Class (Root_Type (Typ)) |
4336 | or else Prim_Pos > CPP_Nb_Prims) | |
725a69d2 | 4337 | and then Find_Dispatching_Type |
a652dd51 | 4338 | (Interface_Alias (Prim)) = Iface |
725a69d2 | 4339 | |
4340 | -- Generate the code of the thunk only if the abstract | |
4341 | -- interface type is not an immediate ancestor of | |
d00681a7 | 4342 | -- Tagged_Type. Otherwise the DT associated with the |
725a69d2 | 4343 | -- interface is the primary DT. |
4344 | ||
cb4af01d | 4345 | and then not Is_Ancestor (Iface, Typ, |
4346 | Use_Full_View => True) | |
725a69d2 | 4347 | then |
cdb1c38f | 4348 | if not Build_Thunks then |
d00681a7 | 4349 | Prim_Pos := |
a652dd51 | 4350 | UI_To_Int (DT_Position (Interface_Alias (Prim))); |
d00681a7 | 4351 | Prim_Table (Prim_Pos) := Alias (Prim); |
4352 | ||
cdb1c38f | 4353 | else |
4354 | Expand_Interface_Thunk (Prim, Thunk_Id, Thunk_Code); | |
725a69d2 | 4355 | |
cdb1c38f | 4356 | if Present (Thunk_Id) then |
d00681a7 | 4357 | Prim_Pos := |
a652dd51 | 4358 | UI_To_Int (DT_Position (Interface_Alias (Prim))); |
cdb1c38f | 4359 | |
d00681a7 | 4360 | Prim_Table (Prim_Pos) := Thunk_Id; |
cdb1c38f | 4361 | Append_To (Result, Thunk_Code); |
4362 | end if; | |
725a69d2 | 4363 | end if; |
4364 | end if; | |
4365 | ||
4366 | Next_Elmt (Prim_Elmt); | |
4367 | end loop; | |
4368 | ||
4369 | for J in Prim_Table'Range loop | |
4370 | if Present (Prim_Table (J)) then | |
4371 | New_Node := | |
cc60bd16 | 4372 | Unchecked_Convert_To (RTE (RE_Prim_Ptr), |
acf97c11 | 4373 | Make_Attribute_Reference (Loc, |
83c6c069 | 4374 | Prefix => New_Occurrence_Of (Prim_Table (J), Loc), |
acf97c11 | 4375 | Attribute_Name => Name_Unrestricted_Access)); |
d00681a7 | 4376 | |
725a69d2 | 4377 | else |
cc60bd16 | 4378 | New_Node := Make_Null (Loc); |
725a69d2 | 4379 | end if; |
4380 | ||
4381 | Append_To (Prim_Ops_Aggr_List, New_Node); | |
4382 | end loop; | |
4383 | end; | |
4384 | end if; | |
4385 | ||
cc60bd16 | 4386 | New_Node := |
725a69d2 | 4387 | Make_Aggregate (Loc, |
cc60bd16 | 4388 | Expressions => Prim_Ops_Aggr_List); |
4389 | ||
4390 | Append_To (DT_Aggr_List, New_Node); | |
4391 | ||
4392 | -- Remember aggregates initializing dispatch tables | |
4393 | ||
4394 | Append_Elmt (New_Node, DT_Aggr); | |
725a69d2 | 4395 | |
f301a57b | 4396 | -- Note: Secondary dispatch tables cannot be declared constant |
4397 | -- because the component Offset_To_Top is currently initialized | |
4398 | -- by the IP routine. | |
4399 | ||
725a69d2 | 4400 | Append_To (Result, |
4401 | Make_Object_Declaration (Loc, | |
4402 | Defining_Identifier => Iface_DT, | |
4403 | Aliased_Present => True, | |
f301a57b | 4404 | Constant_Present => False, |
4405 | ||
725a69d2 | 4406 | Object_Definition => |
4407 | Make_Subtype_Indication (Loc, | |
83c6c069 | 4408 | Subtype_Mark => New_Occurrence_Of |
725a69d2 | 4409 | (RTE (RE_Dispatch_Table_Wrapper), Loc), |
4410 | Constraint => Make_Index_Or_Discriminant_Constraint (Loc, | |
4411 | Constraints => DT_Constr_List)), | |
4412 | ||
f301a57b | 4413 | Expression => |
4414 | Make_Aggregate (Loc, | |
4415 | Expressions => DT_Aggr_List))); | |
725a69d2 | 4416 | |
17e14451 | 4417 | Append_To (Result, |
4418 | Make_Attribute_Definition_Clause (Loc, | |
83c6c069 | 4419 | Name => New_Occurrence_Of (Iface_DT, Loc), |
17e14451 | 4420 | Chars => Name_Alignment, |
f301a57b | 4421 | |
17e14451 | 4422 | Expression => |
4423 | Make_Attribute_Reference (Loc, | |
f301a57b | 4424 | Prefix => |
83c6c069 | 4425 | New_Occurrence_Of (RTE (RE_Integer_Address), Loc), |
17e14451 | 4426 | Attribute_Name => Name_Alignment))); |
4427 | ||
f301a57b | 4428 | if Exporting_Table then |
4429 | Export_DT (Typ, Iface_DT, Suffix_Index); | |
4430 | ||
725a69d2 | 4431 | -- Generate code to create the pointer to the dispatch table |
4432 | ||
f301a57b | 4433 | -- Iface_DT_Ptr : Tag := Tag!(DT.Prims_Ptr'Address); |
725a69d2 | 4434 | |
f301a57b | 4435 | -- Note: This declaration is not added here if the table is exported |
4436 | -- because in such case Make_Tags has already added this declaration. | |
4437 | ||
4438 | else | |
4439 | Append_To (Result, | |
4440 | Make_Object_Declaration (Loc, | |
4441 | Defining_Identifier => Iface_DT_Ptr, | |
4442 | Constant_Present => True, | |
4443 | ||
4444 | Object_Definition => | |
83c6c069 | 4445 | New_Occurrence_Of (RTE (RE_Interface_Tag), Loc), |
f301a57b | 4446 | |
4447 | Expression => | |
4448 | Unchecked_Convert_To (RTE (RE_Interface_Tag), | |
4449 | Make_Attribute_Reference (Loc, | |
4450 | Prefix => | |
4451 | Make_Selected_Component (Loc, | |
83c6c069 | 4452 | Prefix => New_Occurrence_Of (Iface_DT, Loc), |
f301a57b | 4453 | Selector_Name => |
4454 | New_Occurrence_Of | |
4455 | (RTE_Record_Component (RE_Prims_Ptr), Loc)), | |
4456 | Attribute_Name => Name_Address)))); | |
4457 | end if; | |
725a69d2 | 4458 | |
acf97c11 | 4459 | Append_To (Result, |
4460 | Make_Object_Declaration (Loc, | |
4461 | Defining_Identifier => Predef_Prims_Ptr, | |
4462 | Constant_Present => True, | |
f301a57b | 4463 | |
4464 | Object_Definition => | |
83c6c069 | 4465 | New_Occurrence_Of (RTE (RE_Address), Loc), |
f301a57b | 4466 | |
4467 | Expression => | |
acf97c11 | 4468 | Make_Attribute_Reference (Loc, |
f301a57b | 4469 | Prefix => |
acf97c11 | 4470 | Make_Selected_Component (Loc, |
83c6c069 | 4471 | Prefix => New_Occurrence_Of (Iface_DT, Loc), |
f301a57b | 4472 | Selector_Name => |
4473 | New_Occurrence_Of | |
4474 | (RTE_Record_Component (RE_Predef_Prims), Loc)), | |
acf97c11 | 4475 | Attribute_Name => Name_Address))); |
4476 | ||
cc60bd16 | 4477 | -- Remember entities containing dispatch tables |
acf97c11 | 4478 | |
cc60bd16 | 4479 | Append_Elmt (Predef_Prims, DT_Decl); |
4480 | Append_Elmt (Iface_DT, DT_Decl); | |
725a69d2 | 4481 | end Make_Secondary_DT; |
4482 | ||
4483 | -- Local variables | |
4484 | ||
2ea346ac | 4485 | Elab_Code : constant List_Id := New_List; |
4486 | Result : constant List_Id := New_List; | |
4487 | Tname : constant Name_Id := Chars (Typ); | |
725a69d2 | 4488 | AI : Elmt_Id; |
cdb1c38f | 4489 | AI_Tag_Elmt : Elmt_Id; |
24971415 | 4490 | AI_Tag_Comp : Elmt_Id; |
f9162257 | 4491 | DT_Aggr_List : List_Id; |
24971415 | 4492 | DT_Constr_List : List_Id; |
725a69d2 | 4493 | DT_Ptr : Entity_Id; |
725a69d2 | 4494 | ITable : Node_Id; |
4495 | I_Depth : Nat := 0; | |
4496 | Iface_Table_Node : Node_Id; | |
4497 | Name_ITable : Name_Id; | |
725a69d2 | 4498 | Nb_Predef_Prims : Nat := 0; |
4499 | Nb_Prim : Nat := 0; | |
4500 | New_Node : Node_Id; | |
725a69d2 | 4501 | Num_Ifaces : Nat := 0; |
cc60bd16 | 4502 | Parent_Typ : Entity_Id; |
725a69d2 | 4503 | Prim : Entity_Id; |
4504 | Prim_Elmt : Elmt_Id; | |
4505 | Prim_Ops_Aggr_List : List_Id; | |
725a69d2 | 4506 | Suffix_Index : Int; |
4507 | Typ_Comps : Elist_Id; | |
4508 | Typ_Ifaces : Elist_Id; | |
4509 | TSD_Aggr_List : List_Id; | |
4510 | TSD_Tags_List : List_Id; | |
17e14451 | 4511 | |
4512 | -- The following name entries are used by Make_DT to generate a number | |
4513 | -- of entities related to a tagged type. These entities may be generated | |
4514 | -- in a scope other than that of the tagged type declaration, and if | |
4515 | -- the entities for two tagged types with the same name happen to be | |
4516 | -- generated in the same scope, we have to take care to use different | |
4517 | -- names. This is achieved by means of a unique serial number appended | |
4518 | -- to each generated entity name. | |
4519 | ||
4520 | Name_DT : constant Name_Id := | |
4521 | New_External_Name (Tname, 'T', Suffix_Index => -1); | |
4522 | Name_Exname : constant Name_Id := | |
4523 | New_External_Name (Tname, 'E', Suffix_Index => -1); | |
e7e688dd | 4524 | Name_HT_Link : constant Name_Id := |
4525 | New_External_Name (Tname, 'H', Suffix_Index => -1); | |
17e14451 | 4526 | Name_Predef_Prims : constant Name_Id := |
4527 | New_External_Name (Tname, 'R', Suffix_Index => -1); | |
4528 | Name_SSD : constant Name_Id := | |
4529 | New_External_Name (Tname, 'S', Suffix_Index => -1); | |
4530 | Name_TSD : constant Name_Id := | |
4531 | New_External_Name (Tname, 'B', Suffix_Index => -1); | |
4532 | ||
4533 | -- Entities built with above names | |
4534 | ||
4535 | DT : constant Entity_Id := | |
4536 | Make_Defining_Identifier (Loc, Name_DT); | |
4537 | Exname : constant Entity_Id := | |
4538 | Make_Defining_Identifier (Loc, Name_Exname); | |
e7e688dd | 4539 | HT_Link : constant Entity_Id := |
4540 | Make_Defining_Identifier (Loc, Name_HT_Link); | |
17e14451 | 4541 | Predef_Prims : constant Entity_Id := |
4542 | Make_Defining_Identifier (Loc, Name_Predef_Prims); | |
4543 | SSD : constant Entity_Id := | |
4544 | Make_Defining_Identifier (Loc, Name_SSD); | |
4545 | TSD : constant Entity_Id := | |
4546 | Make_Defining_Identifier (Loc, Name_TSD); | |
725a69d2 | 4547 | |
4548 | -- Start of processing for Make_DT | |
4549 | ||
4550 | begin | |
17e14451 | 4551 | pragma Assert (Is_Frozen (Typ)); |
725a69d2 | 4552 | |
17e14451 | 4553 | -- Handle cases in which there is no need to build the dispatch table |
725a69d2 | 4554 | |
17e14451 | 4555 | if Has_Dispatch_Table (Typ) |
4556 | or else No (Access_Disp_Table (Typ)) | |
4557 | or else Is_CPP_Class (Typ) | |
b46aca2b | 4558 | or else Convention (Typ) = Convention_CIL |
4559 | or else Convention (Typ) = Convention_Java | |
17e14451 | 4560 | then |
725a69d2 | 4561 | return Result; |
725a69d2 | 4562 | |
17e14451 | 4563 | elsif No_Run_Time_Mode then |
4564 | Error_Msg_CRT ("tagged types", Typ); | |
4565 | return Result; | |
725a69d2 | 4566 | |
17e14451 | 4567 | elsif not RTE_Available (RE_Tag) then |
725a69d2 | 4568 | Append_To (Result, |
4569 | Make_Object_Declaration (Loc, | |
17e14451 | 4570 | Defining_Identifier => Node (First_Elmt |
4571 | (Access_Disp_Table (Typ))), | |
83c6c069 | 4572 | Object_Definition => New_Occurrence_Of (RTE (RE_Tag), Loc), |
725a69d2 | 4573 | Constant_Present => True, |
4574 | Expression => | |
24971415 | 4575 | Unchecked_Convert_To (RTE (RE_Tag), |
83c6c069 | 4576 | New_Occurrence_Of (RTE (RE_Null_Address), Loc)))); |
725a69d2 | 4577 | |
4578 | Analyze_List (Result, Suppress => All_Checks); | |
4579 | Error_Msg_CRT ("tagged types", Typ); | |
4580 | return Result; | |
4581 | end if; | |
4582 | ||
17e14451 | 4583 | -- Ensure that the value of Max_Predef_Prims defined in a-tags is |
208fd589 | 4584 | -- correct. Valid values are 9 under configurable runtime or 15 |
17e14451 | 4585 | -- with full runtime. |
4586 | ||
4587 | if RTE_Available (RE_Interface_Data) then | |
208fd589 | 4588 | if Max_Predef_Prims /= 15 then |
17e14451 | 4589 | Error_Msg_N ("run-time library configuration error", Typ); |
4590 | return Result; | |
4591 | end if; | |
725a69d2 | 4592 | else |
208fd589 | 4593 | if Max_Predef_Prims /= 9 then |
17e14451 | 4594 | Error_Msg_N ("run-time library configuration error", Typ); |
4595 | Error_Msg_CRT ("tagged types", Typ); | |
4596 | return Result; | |
4597 | end if; | |
725a69d2 | 4598 | end if; |
4599 | ||
cc60bd16 | 4600 | -- Initialize Parent_Typ handling private types |
4601 | ||
4602 | Parent_Typ := Etype (Typ); | |
4603 | ||
4604 | if Present (Full_View (Parent_Typ)) then | |
4605 | Parent_Typ := Full_View (Parent_Typ); | |
4606 | end if; | |
4607 | ||
17e14451 | 4608 | -- Ensure that all the primitives are frozen. This is only required when |
4609 | -- building static dispatch tables --- the primitives must be frozen to | |
4610 | -- be referenced (otherwise we have problems with the backend). It is | |
4611 | -- not a requirement with nonstatic dispatch tables because in this case | |
4612 | -- we generate now an empty dispatch table; the extra code required to | |
24971415 | 4613 | -- register the primitives in the slots will be generated later --- when |
17e14451 | 4614 | -- each primitive is frozen (see Freeze_Subprogram). |
725a69d2 | 4615 | |
d00681a7 | 4616 | if Building_Static_DT (Typ) then |
17e14451 | 4617 | declare |
4618 | Save : constant Boolean := Freezing_Library_Level_Tagged_Type; | |
555c63a6 | 4619 | Prim : Entity_Id; |
17e14451 | 4620 | Prim_Elmt : Elmt_Id; |
4621 | Frnodes : List_Id; | |
725a69d2 | 4622 | |
17e14451 | 4623 | begin |
4624 | Freezing_Library_Level_Tagged_Type := True; | |
555c63a6 | 4625 | |
17e14451 | 4626 | Prim_Elmt := First_Elmt (Primitive_Operations (Typ)); |
4627 | while Present (Prim_Elmt) loop | |
555c63a6 | 4628 | Prim := Node (Prim_Elmt); |
d74fc39a | 4629 | Frnodes := Freeze_Entity (Prim, Typ); |
725a69d2 | 4630 | |
17e14451 | 4631 | declare |
17e14451 | 4632 | F : Entity_Id; |
725a69d2 | 4633 | |
17e14451 | 4634 | begin |
555c63a6 | 4635 | F := First_Formal (Prim); |
17e14451 | 4636 | while Present (F) loop |
349db231 | 4637 | Check_Premature_Freezing (Prim, Typ, Etype (F)); |
17e14451 | 4638 | Next_Formal (F); |
4639 | end loop; | |
4640 | ||
349db231 | 4641 | Check_Premature_Freezing (Prim, Typ, Etype (Prim)); |
17e14451 | 4642 | end; |
4643 | ||
4644 | if Present (Frnodes) then | |
4645 | Append_List_To (Result, Frnodes); | |
4646 | end if; | |
4647 | ||
4648 | Next_Elmt (Prim_Elmt); | |
4649 | end loop; | |
555c63a6 | 4650 | |
17e14451 | 4651 | Freezing_Library_Level_Tagged_Type := Save; |
4652 | end; | |
4653 | end if; | |
725a69d2 | 4654 | |
17e14451 | 4655 | -- Ada 2005 (AI-251): Build the secondary dispatch tables |
4656 | ||
a652dd51 | 4657 | if Has_Interfaces (Typ) then |
17e14451 | 4658 | Collect_Interface_Components (Typ, Typ_Comps); |
4659 | ||
f301a57b | 4660 | -- Each secondary dispatch table is assigned an unique positive |
4661 | -- suffix index; such value also corresponds with the location of | |
4662 | -- its entity in the Dispatch_Table_Wrappers list (see Make_Tags). | |
4663 | ||
4664 | -- Note: This value must be kept sync with the Suffix_Index values | |
4665 | -- generated by Make_Tags | |
4666 | ||
4667 | Suffix_Index := 1; | |
acf97c11 | 4668 | AI_Tag_Elmt := |
4669 | Next_Elmt (Next_Elmt (First_Elmt (Access_Disp_Table (Typ)))); | |
17e14451 | 4670 | |
4671 | AI_Tag_Comp := First_Elmt (Typ_Comps); | |
4672 | while Present (AI_Tag_Comp) loop | |
d00681a7 | 4673 | pragma Assert (Has_Suffix (Node (AI_Tag_Elmt), 'P')); |
cdb1c38f | 4674 | |
4675 | -- Build the secondary table containing pointers to thunks | |
4676 | ||
17e14451 | 4677 | Make_Secondary_DT |
cdb1c38f | 4678 | (Typ => Typ, |
4679 | Iface => Base_Type (Related_Type (Node (AI_Tag_Comp))), | |
f301a57b | 4680 | Suffix_Index => Suffix_Index, |
cdb1c38f | 4681 | Num_Iface_Prims => UI_To_Int |
4682 | (DT_Entry_Count (Node (AI_Tag_Comp))), | |
4683 | Iface_DT_Ptr => Node (AI_Tag_Elmt), | |
acf97c11 | 4684 | Predef_Prims_Ptr => Node (Next_Elmt (AI_Tag_Elmt)), |
cdb1c38f | 4685 | Build_Thunks => True, |
4686 | Result => Result); | |
cdb1c38f | 4687 | |
d00681a7 | 4688 | -- Skip secondary dispatch table referencing thunks to predefined |
4689 | -- primitives. | |
acf97c11 | 4690 | |
f301a57b | 4691 | Next_Elmt (AI_Tag_Elmt); |
d00681a7 | 4692 | pragma Assert (Has_Suffix (Node (AI_Tag_Elmt), 'Y')); |
4693 | ||
4694 | -- Secondary dispatch table referencing user-defined primitives | |
4695 | -- covered by this interface. | |
4696 | ||
acf97c11 | 4697 | Next_Elmt (AI_Tag_Elmt); |
d00681a7 | 4698 | pragma Assert (Has_Suffix (Node (AI_Tag_Elmt), 'D')); |
acf97c11 | 4699 | |
36b938a3 | 4700 | -- Build the secondary table containing pointers to primitives |
cdb1c38f | 4701 | -- (used to give support to Generic Dispatching Constructors). |
4702 | ||
4703 | Make_Secondary_DT | |
d00681a7 | 4704 | (Typ => Typ, |
4705 | Iface => Base_Type | |
4706 | (Related_Type (Node (AI_Tag_Comp))), | |
4707 | Suffix_Index => -1, | |
4708 | Num_Iface_Prims => UI_To_Int | |
4709 | (DT_Entry_Count (Node (AI_Tag_Comp))), | |
4710 | Iface_DT_Ptr => Node (AI_Tag_Elmt), | |
4711 | Predef_Prims_Ptr => Node (Next_Elmt (AI_Tag_Elmt)), | |
4712 | Build_Thunks => False, | |
4713 | Result => Result); | |
4714 | ||
4715 | -- Skip secondary dispatch table referencing predefined primitives | |
acf97c11 | 4716 | |
f301a57b | 4717 | Next_Elmt (AI_Tag_Elmt); |
d00681a7 | 4718 | pragma Assert (Has_Suffix (Node (AI_Tag_Elmt), 'Z')); |
acf97c11 | 4719 | |
17e14451 | 4720 | Suffix_Index := Suffix_Index + 1; |
d00681a7 | 4721 | Next_Elmt (AI_Tag_Elmt); |
17e14451 | 4722 | Next_Elmt (AI_Tag_Comp); |
4723 | end loop; | |
4724 | end if; | |
725a69d2 | 4725 | |
c6a30f24 | 4726 | -- Get the _tag entity and number of primitives of its dispatch table |
725a69d2 | 4727 | |
24971415 | 4728 | DT_Ptr := Node (First_Elmt (Access_Disp_Table (Typ))); |
4729 | Nb_Prim := UI_To_Int (DT_Entry_Count (First_Tag_Component (Typ))); | |
725a69d2 | 4730 | |
2ea346ac | 4731 | Set_Is_Statically_Allocated (DT, Is_Library_Level_Tagged_Type (Typ)); |
4732 | Set_Is_Statically_Allocated (SSD, Is_Library_Level_Tagged_Type (Typ)); | |
4733 | Set_Is_Statically_Allocated (TSD, Is_Library_Level_Tagged_Type (Typ)); | |
4734 | Set_Is_Statically_Allocated (Predef_Prims, | |
4735 | Is_Library_Level_Tagged_Type (Typ)); | |
725a69d2 | 4736 | |
4737 | -- In case of locally defined tagged type we declare the object | |
36b938a3 | 4738 | -- containing the dispatch table by means of a variable. Its |
725a69d2 | 4739 | -- initialization is done later by means of an assignment. This is |
4740 | -- required to generate its External_Tag. | |
4741 | ||
24971415 | 4742 | if not Building_Static_DT (Typ) then |
725a69d2 | 4743 | |
4744 | -- Generate: | |
4745 | -- DT : No_Dispatch_Table_Wrapper; | |
17e14451 | 4746 | -- for DT'Alignment use Address'Alignment; |
725a69d2 | 4747 | -- DT_Ptr : Tag := !Tag (DT.NDT_Prims_Ptr'Address); |
4748 | ||
24971415 | 4749 | if not Has_DT (Typ) then |
725a69d2 | 4750 | Append_To (Result, |
4751 | Make_Object_Declaration (Loc, | |
4752 | Defining_Identifier => DT, | |
4753 | Aliased_Present => True, | |
4754 | Constant_Present => False, | |
4755 | Object_Definition => | |
83c6c069 | 4756 | New_Occurrence_Of |
725a69d2 | 4757 | (RTE (RE_No_Dispatch_Table_Wrapper), Loc))); |
4758 | ||
17e14451 | 4759 | Append_To (Result, |
4760 | Make_Attribute_Definition_Clause (Loc, | |
83c6c069 | 4761 | Name => New_Occurrence_Of (DT, Loc), |
17e14451 | 4762 | Chars => Name_Alignment, |
4763 | Expression => | |
4764 | Make_Attribute_Reference (Loc, | |
4765 | Prefix => | |
83c6c069 | 4766 | New_Occurrence_Of (RTE (RE_Integer_Address), Loc), |
17e14451 | 4767 | Attribute_Name => Name_Alignment))); |
4768 | ||
725a69d2 | 4769 | Append_To (Result, |
4770 | Make_Object_Declaration (Loc, | |
4771 | Defining_Identifier => DT_Ptr, | |
83c6c069 | 4772 | Object_Definition => New_Occurrence_Of (RTE (RE_Tag), Loc), |
725a69d2 | 4773 | Constant_Present => True, |
4774 | Expression => | |
24971415 | 4775 | Unchecked_Convert_To (RTE (RE_Tag), |
725a69d2 | 4776 | Make_Attribute_Reference (Loc, |
4777 | Prefix => | |
4778 | Make_Selected_Component (Loc, | |
83c6c069 | 4779 | Prefix => New_Occurrence_Of (DT, Loc), |
725a69d2 | 4780 | Selector_Name => |
4781 | New_Occurrence_Of | |
4782 | (RTE_Record_Component (RE_NDT_Prims_Ptr), Loc)), | |
4783 | Attribute_Name => Name_Address)))); | |
4784 | ||
ff6293ec | 4785 | Set_Is_Statically_Allocated (DT_Ptr, |
4786 | Is_Library_Level_Tagged_Type (Typ)); | |
4787 | ||
98045ff0 | 4788 | -- Generate the SCIL node for the previous object declaration |
4789 | -- because it has a tag initialization. | |
4790 | ||
3dbca0d5 | 4791 | if Generate_SCIL then |
d215f619 | 4792 | New_Node := |
4793 | Make_SCIL_Dispatch_Table_Tag_Init (Sloc (Last (Result))); | |
d215f619 | 4794 | Set_SCIL_Entity (New_Node, Typ); |
5a44b136 | 4795 | Set_SCIL_Node (Last (Result), New_Node); |
3dbca0d5 | 4796 | end if; |
4797 | ||
725a69d2 | 4798 | -- Generate: |
4799 | -- DT : Dispatch_Table_Wrapper (Nb_Prim); | |
4800 | -- for DT'Alignment use Address'Alignment; | |
4801 | -- DT_Ptr : Tag := !Tag (DT.Prims_Ptr'Address); | |
4802 | ||
4803 | else | |
4804 | -- If the tagged type has no primitives we add a dummy slot | |
4805 | -- whose address will be the tag of this type. | |
4806 | ||
4807 | if Nb_Prim = 0 then | |
4808 | DT_Constr_List := | |
4809 | New_List (Make_Integer_Literal (Loc, 1)); | |
4810 | else | |
4811 | DT_Constr_List := | |
4812 | New_List (Make_Integer_Literal (Loc, Nb_Prim)); | |
4813 | end if; | |
4814 | ||
4815 | Append_To (Result, | |
4816 | Make_Object_Declaration (Loc, | |
4817 | Defining_Identifier => DT, | |
4818 | Aliased_Present => True, | |
4819 | Constant_Present => False, | |
4820 | Object_Definition => | |
4821 | Make_Subtype_Indication (Loc, | |
4822 | Subtype_Mark => | |
83c6c069 | 4823 | New_Occurrence_Of (RTE (RE_Dispatch_Table_Wrapper), Loc), |
725a69d2 | 4824 | Constraint => Make_Index_Or_Discriminant_Constraint (Loc, |
4825 | Constraints => DT_Constr_List)))); | |
4826 | ||
4827 | Append_To (Result, | |
4828 | Make_Attribute_Definition_Clause (Loc, | |
83c6c069 | 4829 | Name => New_Occurrence_Of (DT, Loc), |
725a69d2 | 4830 | Chars => Name_Alignment, |
4831 | Expression => | |
4832 | Make_Attribute_Reference (Loc, | |
4833 | Prefix => | |
83c6c069 | 4834 | New_Occurrence_Of (RTE (RE_Integer_Address), Loc), |
725a69d2 | 4835 | Attribute_Name => Name_Alignment))); |
4836 | ||
4837 | Append_To (Result, | |
4838 | Make_Object_Declaration (Loc, | |
4839 | Defining_Identifier => DT_Ptr, | |
83c6c069 | 4840 | Object_Definition => New_Occurrence_Of (RTE (RE_Tag), Loc), |
725a69d2 | 4841 | Constant_Present => True, |
4842 | Expression => | |
24971415 | 4843 | Unchecked_Convert_To (RTE (RE_Tag), |
725a69d2 | 4844 | Make_Attribute_Reference (Loc, |
4845 | Prefix => | |
4846 | Make_Selected_Component (Loc, | |
83c6c069 | 4847 | Prefix => New_Occurrence_Of (DT, Loc), |
725a69d2 | 4848 | Selector_Name => |
4849 | New_Occurrence_Of | |
4850 | (RTE_Record_Component (RE_Prims_Ptr), Loc)), | |
4851 | Attribute_Name => Name_Address)))); | |
acf97c11 | 4852 | |
ff6293ec | 4853 | Set_Is_Statically_Allocated (DT_Ptr, |
4854 | Is_Library_Level_Tagged_Type (Typ)); | |
4855 | ||
98045ff0 | 4856 | -- Generate the SCIL node for the previous object declaration |
4857 | -- because it has a tag initialization. | |
9af28f61 | 4858 | |
3dbca0d5 | 4859 | if Generate_SCIL then |
d215f619 | 4860 | New_Node := |
4861 | Make_SCIL_Dispatch_Table_Tag_Init (Sloc (Last (Result))); | |
d215f619 | 4862 | Set_SCIL_Entity (New_Node, Typ); |
5a44b136 | 4863 | Set_SCIL_Node (Last (Result), New_Node); |
3dbca0d5 | 4864 | end if; |
4865 | ||
acf97c11 | 4866 | Append_To (Result, |
4867 | Make_Object_Declaration (Loc, | |
4868 | Defining_Identifier => | |
4869 | Node (Next_Elmt (First_Elmt (Access_Disp_Table (Typ)))), | |
4870 | Constant_Present => True, | |
83c6c069 | 4871 | Object_Definition => New_Occurrence_Of |
acf97c11 | 4872 | (RTE (RE_Address), Loc), |
4873 | Expression => | |
4874 | Make_Attribute_Reference (Loc, | |
4875 | Prefix => | |
4876 | Make_Selected_Component (Loc, | |
83c6c069 | 4877 | Prefix => New_Occurrence_Of (DT, Loc), |
acf97c11 | 4878 | Selector_Name => |
4879 | New_Occurrence_Of | |
4880 | (RTE_Record_Component (RE_Predef_Prims), Loc)), | |
4881 | Attribute_Name => Name_Address))); | |
725a69d2 | 4882 | end if; |
4883 | end if; | |
4884 | ||
4885 | -- Generate: Exname : constant String := full_qualified_name (typ); | |
343d35dc | 4886 | -- The type itself may be an anonymous parent type, so use the first |
4887 | -- subtype to have a user-recognizable name. | |
d62940bf | 4888 | |
343d35dc | 4889 | Append_To (Result, |
4890 | Make_Object_Declaration (Loc, | |
4891 | Defining_Identifier => Exname, | |
4892 | Constant_Present => True, | |
83c6c069 | 4893 | Object_Definition => New_Occurrence_Of (Standard_String, Loc), |
343d35dc | 4894 | Expression => |
4895 | Make_String_Literal (Loc, | |
c6a30f24 | 4896 | Fully_Qualified_Name_String (First_Subtype (Typ))))); |
d62940bf | 4897 | |
24971415 | 4898 | Set_Is_Statically_Allocated (Exname); |
4899 | Set_Is_True_Constant (Exname); | |
4900 | ||
e7e688dd | 4901 | -- Declare the object used by Ada.Tags.Register_Tag |
4902 | ||
4903 | if RTE_Available (RE_Register_Tag) then | |
4904 | Append_To (Result, | |
4905 | Make_Object_Declaration (Loc, | |
4906 | Defining_Identifier => HT_Link, | |
83c6c069 | 4907 | Object_Definition => New_Occurrence_Of (RTE (RE_Tag), Loc))); |
e7e688dd | 4908 | end if; |
4909 | ||
725a69d2 | 4910 | -- Generate code to create the storage for the type specific data object |
4911 | -- with enough space to store the tags of the ancestors plus the tags | |
4912 | -- of all the implemented interfaces (as described in a-tags.adb). | |
4913 | ||
4914 | -- TSD : Type_Specific_Data (I_Depth) := | |
4915 | -- (Idepth => I_Depth, | |
4916 | -- Access_Level => Type_Access_Level (Typ), | |
208fd589 | 4917 | -- Alignment => Typ'Alignment, |
725a69d2 | 4918 | -- Expanded_Name => Cstring_Ptr!(Exname'Address)) |
4919 | -- External_Tag => Cstring_Ptr!(Exname'Address)) | |
e7e688dd | 4920 | -- HT_Link => HT_Link'Address, |
725a69d2 | 4921 | -- Transportable => <<boolean-value>>, |
3568e554 | 4922 | -- Type_Is_Abstract => <<boolean-value>>, |
bb3b440a | 4923 | -- Needs_Finalization => <<boolean-value>>, |
693b0822 | 4924 | -- [ Size_Func => Size_Prim'Access, ] |
4925 | -- [ Interfaces_Table => <<access-value>>, ] | |
24971415 | 4926 | -- [ SSD => SSD_Table'Address ] |
725a69d2 | 4927 | -- Tags_Table => (0 => null, |
4928 | -- 1 => Parent'Tag | |
4929 | -- ...); | |
4930 | -- for TSD'Alignment use Address'Alignment | |
4931 | ||
4932 | TSD_Aggr_List := New_List; | |
4933 | ||
4934 | -- Idepth: Count ancestors to compute the inheritance depth. For private | |
4935 | -- extensions, always go to the full view in order to compute the real | |
4936 | -- inheritance depth. | |
4937 | ||
4938 | declare | |
4939 | Current_Typ : Entity_Id; | |
4940 | Parent_Typ : Entity_Id; | |
4941 | ||
4942 | begin | |
4943 | I_Depth := 0; | |
4944 | Current_Typ := Typ; | |
4945 | loop | |
4946 | Parent_Typ := Etype (Current_Typ); | |
4947 | ||
4948 | if Is_Private_Type (Parent_Typ) then | |
4949 | Parent_Typ := Full_View (Base_Type (Parent_Typ)); | |
4950 | end if; | |
4951 | ||
4952 | exit when Parent_Typ = Current_Typ; | |
4953 | ||
4954 | I_Depth := I_Depth + 1; | |
4955 | Current_Typ := Parent_Typ; | |
4956 | end loop; | |
4957 | end; | |
4958 | ||
4959 | Append_To (TSD_Aggr_List, | |
17e14451 | 4960 | Make_Integer_Literal (Loc, I_Depth)); |
725a69d2 | 4961 | |
4962 | -- Access_Level | |
4963 | ||
4964 | Append_To (TSD_Aggr_List, | |
17e14451 | 4965 | Make_Integer_Literal (Loc, Type_Access_Level (Typ))); |
725a69d2 | 4966 | |
208fd589 | 4967 | -- Alignment |
4968 | ||
4969 | -- For CPP types we cannot rely on the value of 'Alignment provided | |
4970 | -- by the backend to initialize this TSD field. | |
4971 | ||
4972 | if Convention (Typ) = Convention_CPP | |
4973 | or else Is_CPP_Class (Root_Type (Typ)) | |
4974 | then | |
4975 | Append_To (TSD_Aggr_List, | |
4976 | Make_Integer_Literal (Loc, 0)); | |
4977 | else | |
4978 | Append_To (TSD_Aggr_List, | |
4979 | Make_Attribute_Reference (Loc, | |
83c6c069 | 4980 | Prefix => New_Occurrence_Of (Typ, Loc), |
208fd589 | 4981 | Attribute_Name => Name_Alignment)); |
4982 | end if; | |
4983 | ||
725a69d2 | 4984 | -- Expanded_Name |
4985 | ||
4986 | Append_To (TSD_Aggr_List, | |
17e14451 | 4987 | Unchecked_Convert_To (RTE (RE_Cstring_Ptr), |
4988 | Make_Attribute_Reference (Loc, | |
83c6c069 | 4989 | Prefix => New_Occurrence_Of (Exname, Loc), |
17e14451 | 4990 | Attribute_Name => Name_Address))); |
725a69d2 | 4991 | |
4992 | -- External_Tag of a local tagged type | |
4993 | ||
17e14451 | 4994 | -- <typ>A : constant String := |
725a69d2 | 4995 | -- "Internal tag at 16#tag-addr#: <full-name-of-typ>"; |
4996 | ||
4997 | -- The reason we generate this strange name is that we do not want to | |
4998 | -- enter local tagged types in the global hash table used to compute | |
4999 | -- the Internal_Tag attribute for two reasons: | |
5000 | ||
5001 | -- 1. It is hard to avoid a tasking race condition for entering the | |
5002 | -- entry into the hash table. | |
5003 | ||
5004 | -- 2. It would cause a storage leak, unless we rig up considerable | |
5005 | -- mechanism to remove the entry from the hash table on exit. | |
5006 | ||
5007 | -- So what we do is to generate the above external tag name, where the | |
5008 | -- hex address is the address of the local dispatch table (i.e. exactly | |
5009 | -- the value we want if Internal_Tag is computed from this string). | |
5010 | ||
5011 | -- Of course this value will only be valid if the tagged type is still | |
5012 | -- in scope, but it clearly must be erroneous to compute the internal | |
39a0c1d3 | 5013 | -- tag of a tagged type that is out of scope. |
725a69d2 | 5014 | |
17e14451 | 5015 | -- We don't do this processing if an explicit external tag has been |
5016 | -- specified. That's an odd case for which we have already issued a | |
5017 | -- warning, where we will not be able to compute the internal tag. | |
5018 | ||
5019 | if not Is_Library_Level_Entity (Typ) | |
5020 | and then not Has_External_Tag_Rep_Clause (Typ) | |
5021 | then | |
725a69d2 | 5022 | declare |
725a69d2 | 5023 | Exname : constant Entity_Id := |
17e14451 | 5024 | Make_Defining_Identifier (Loc, |
5025 | New_External_Name (Tname, 'A')); | |
5026 | ||
725a69d2 | 5027 | Full_Name : constant String_Id := |
c6a30f24 | 5028 | Fully_Qualified_Name_String (First_Subtype (Typ)); |
725a69d2 | 5029 | Str1_Id : String_Id; |
5030 | Str2_Id : String_Id; | |
725a69d2 | 5031 | |
5032 | begin | |
5033 | -- Generate: | |
17e14451 | 5034 | -- Str1 = "Internal tag at 16#"; |
725a69d2 | 5035 | |
5036 | Start_String; | |
5037 | Store_String_Chars ("Internal tag at 16#"); | |
5038 | Str1_Id := End_String; | |
5039 | ||
5040 | -- Generate: | |
17e14451 | 5041 | -- Str2 = "#: <type-full-name>"; |
725a69d2 | 5042 | |
5043 | Start_String; | |
5044 | Store_String_Chars ("#: "); | |
725a69d2 | 5045 | Store_String_Chars (Full_Name); |
17e14451 | 5046 | Str2_Id := End_String; |
725a69d2 | 5047 | |
5048 | -- Generate: | |
5049 | -- Exname : constant String := | |
17e14451 | 5050 | -- Str1 & Address_Image (Tag) & Str2; |
725a69d2 | 5051 | |
5052 | if RTE_Available (RE_Address_Image) then | |
5053 | Append_To (Result, | |
5054 | Make_Object_Declaration (Loc, | |
5055 | Defining_Identifier => Exname, | |
5056 | Constant_Present => True, | |
83c6c069 | 5057 | Object_Definition => New_Occurrence_Of |
725a69d2 | 5058 | (Standard_String, Loc), |
5059 | Expression => | |
5060 | Make_Op_Concat (Loc, | |
5061 | Left_Opnd => | |
5062 | Make_String_Literal (Loc, Str1_Id), | |
5063 | Right_Opnd => | |
5064 | Make_Op_Concat (Loc, | |
5065 | Left_Opnd => | |
5066 | Make_Function_Call (Loc, | |
5067 | Name => | |
83c6c069 | 5068 | New_Occurrence_Of |
725a69d2 | 5069 | (RTE (RE_Address_Image), Loc), |
5070 | Parameter_Associations => New_List ( | |
5071 | Unchecked_Convert_To (RTE (RE_Address), | |
83c6c069 | 5072 | New_Occurrence_Of (DT_Ptr, Loc)))), |
725a69d2 | 5073 | Right_Opnd => |
17e14451 | 5074 | Make_String_Literal (Loc, Str2_Id))))); |
5075 | ||
725a69d2 | 5076 | else |
5077 | Append_To (Result, | |
5078 | Make_Object_Declaration (Loc, | |
5079 | Defining_Identifier => Exname, | |
5080 | Constant_Present => True, | |
83c6c069 | 5081 | Object_Definition => New_Occurrence_Of |
725a69d2 | 5082 | (Standard_String, Loc), |
5083 | Expression => | |
5084 | Make_Op_Concat (Loc, | |
5085 | Left_Opnd => | |
5086 | Make_String_Literal (Loc, Str1_Id), | |
5087 | Right_Opnd => | |
17e14451 | 5088 | Make_String_Literal (Loc, Str2_Id)))); |
725a69d2 | 5089 | end if; |
5090 | ||
5091 | New_Node := | |
5092 | Unchecked_Convert_To (RTE (RE_Cstring_Ptr), | |
5093 | Make_Attribute_Reference (Loc, | |
83c6c069 | 5094 | Prefix => New_Occurrence_Of (Exname, Loc), |
725a69d2 | 5095 | Attribute_Name => Name_Address)); |
5096 | end; | |
5097 | ||
5098 | -- External tag of a library-level tagged type: Check for a definition | |
5099 | -- of External_Tag. The clause is considered only if it applies to this | |
5100 | -- specific tagged type, as opposed to one of its ancestors. | |
cc60bd16 | 5101 | -- If the type is an unconstrained type extension, we are building the |
5102 | -- dispatch table of its anonymous base type, so the external tag, if | |
34fd8639 | 5103 | -- any was specified, must be retrieved from the first subtype. Go to |
5104 | -- the full view in case the clause is in the private part. | |
725a69d2 | 5105 | |
5106 | else | |
5107 | declare | |
cc60bd16 | 5108 | Def : constant Node_Id := Get_Attribute_Definition_Clause |
34fd8639 | 5109 | (Underlying_Type (First_Subtype (Typ)), |
cc60bd16 | 5110 | Attribute_External_Tag); |
5111 | ||
725a69d2 | 5112 | Old_Val : String_Id; |
5113 | New_Val : String_Id; | |
5114 | E : Entity_Id; | |
5115 | ||
5116 | begin | |
5117 | if not Present (Def) | |
cc60bd16 | 5118 | or else Entity (Name (Def)) /= First_Subtype (Typ) |
725a69d2 | 5119 | then |
5120 | New_Node := | |
5121 | Unchecked_Convert_To (RTE (RE_Cstring_Ptr), | |
5122 | Make_Attribute_Reference (Loc, | |
83c6c069 | 5123 | Prefix => New_Occurrence_Of (Exname, Loc), |
725a69d2 | 5124 | Attribute_Name => Name_Address)); |
5125 | else | |
5126 | Old_Val := Strval (Expr_Value_S (Expression (Def))); | |
5127 | ||
17e14451 | 5128 | -- For the rep clause "for <typ>'external_tag use y" generate: |
725a69d2 | 5129 | |
17e14451 | 5130 | -- <typ>A : constant string := y; |
5131 | -- | |
5132 | -- <typ>A'Address is used to set the External_Tag component | |
5133 | -- of the TSD | |
725a69d2 | 5134 | |
5135 | -- Create a new nul terminated string if it is not already | |
5136 | ||
5137 | if String_Length (Old_Val) > 0 | |
5138 | and then | |
5139 | Get_String_Char (Old_Val, String_Length (Old_Val)) = 0 | |
5140 | then | |
5141 | New_Val := Old_Val; | |
5142 | else | |
5143 | Start_String (Old_Val); | |
5144 | Store_String_Char (Get_Char_Code (ASCII.NUL)); | |
5145 | New_Val := End_String; | |
5146 | end if; | |
5147 | ||
5148 | E := Make_Defining_Identifier (Loc, | |
5149 | New_External_Name (Chars (Typ), 'A')); | |
5150 | ||
5151 | Append_To (Result, | |
5152 | Make_Object_Declaration (Loc, | |
5153 | Defining_Identifier => E, | |
5154 | Constant_Present => True, | |
5155 | Object_Definition => | |
83c6c069 | 5156 | New_Occurrence_Of (Standard_String, Loc), |
725a69d2 | 5157 | Expression => |
5158 | Make_String_Literal (Loc, New_Val))); | |
5159 | ||
5160 | New_Node := | |
5161 | Unchecked_Convert_To (RTE (RE_Cstring_Ptr), | |
5162 | Make_Attribute_Reference (Loc, | |
83c6c069 | 5163 | Prefix => New_Occurrence_Of (E, Loc), |
725a69d2 | 5164 | Attribute_Name => Name_Address)); |
5165 | end if; | |
5166 | end; | |
5167 | end if; | |
5168 | ||
17e14451 | 5169 | Append_To (TSD_Aggr_List, New_Node); |
725a69d2 | 5170 | |
5171 | -- HT_Link | |
5172 | ||
e7e688dd | 5173 | if RTE_Available (RE_Register_Tag) then |
5174 | Append_To (TSD_Aggr_List, | |
5175 | Unchecked_Convert_To (RTE (RE_Tag_Ptr), | |
5176 | Make_Attribute_Reference (Loc, | |
83c6c069 | 5177 | Prefix => New_Occurrence_Of (HT_Link, Loc), |
e7e688dd | 5178 | Attribute_Name => Name_Address))); |
5179 | else | |
5180 | Append_To (TSD_Aggr_List, | |
5181 | Unchecked_Convert_To (RTE (RE_Tag_Ptr), | |
83c6c069 | 5182 | New_Occurrence_Of (RTE (RE_Null_Address), Loc))); |
e7e688dd | 5183 | end if; |
725a69d2 | 5184 | |
5185 | -- Transportable: Set for types that can be used in remote calls | |
5186 | -- with respect to E.4(18) legality rules. | |
5187 | ||
17e14451 | 5188 | declare |
5189 | Transportable : Entity_Id; | |
725a69d2 | 5190 | |
17e14451 | 5191 | begin |
5192 | Transportable := | |
5193 | Boolean_Literals | |
5194 | (Is_Pure (Typ) | |
5195 | or else Is_Shared_Passive (Typ) | |
5196 | or else | |
5197 | ((Is_Remote_Types (Typ) | |
5198 | or else Is_Remote_Call_Interface (Typ)) | |
5199 | and then Original_View_In_Visible_Part (Typ)) | |
5200 | or else not Comes_From_Source (Typ)); | |
5201 | ||
5202 | Append_To (TSD_Aggr_List, | |
5203 | New_Occurrence_Of (Transportable, Loc)); | |
5204 | end; | |
725a69d2 | 5205 | |
3568e554 | 5206 | -- Type_Is_Abstract (Ada 2012: AI05-0173). This functionality is |
5207 | -- not available in the HIE runtime. | |
5208 | ||
5209 | if RTE_Record_Component_Available (RE_Type_Is_Abstract) then | |
5210 | declare | |
5211 | Type_Is_Abstract : Entity_Id; | |
5212 | ||
5213 | begin | |
5214 | Type_Is_Abstract := | |
5215 | Boolean_Literals (Is_Abstract_Type (Typ)); | |
5216 | ||
5217 | Append_To (TSD_Aggr_List, | |
5218 | New_Occurrence_Of (Type_Is_Abstract, Loc)); | |
5219 | end; | |
5220 | end if; | |
5221 | ||
bb3b440a | 5222 | -- Needs_Finalization: Set if the type is controlled or has controlled |
5223 | -- components. | |
952af0b9 | 5224 | |
17e14451 | 5225 | declare |
bb3b440a | 5226 | Needs_Fin : Entity_Id; |
343d35dc | 5227 | |
17e14451 | 5228 | begin |
bb3b440a | 5229 | Needs_Fin := Boolean_Literals (Needs_Finalization (Typ)); |
5230 | Append_To (TSD_Aggr_List, New_Occurrence_Of (Needs_Fin, Loc)); | |
17e14451 | 5231 | end; |
725a69d2 | 5232 | |
cc60bd16 | 5233 | -- Size_Func |
5234 | ||
5235 | if RTE_Record_Component_Available (RE_Size_Func) then | |
925c2ba1 | 5236 | |
5237 | -- Initialize this field to Null_Address if we are not building | |
5238 | -- static dispatch tables static or if the size function is not | |
5239 | -- available. In the former case we cannot initialize this field | |
5240 | -- until the function is frozen and registered in the dispatch | |
5241 | -- table (see Register_Primitive). | |
5242 | ||
5243 | if not Building_Static_DT (Typ) or else not Has_DT (Typ) then | |
cc60bd16 | 5244 | Append_To (TSD_Aggr_List, |
5245 | Unchecked_Convert_To (RTE (RE_Size_Ptr), | |
83c6c069 | 5246 | New_Occurrence_Of (RTE (RE_Null_Address), Loc))); |
cc60bd16 | 5247 | |
5248 | else | |
5249 | declare | |
5250 | Prim_Elmt : Elmt_Id; | |
5251 | Prim : Entity_Id; | |
fa6a6949 | 5252 | Size_Comp : Node_Id; |
cc60bd16 | 5253 | |
5254 | begin | |
5255 | Prim_Elmt := First_Elmt (Primitive_Operations (Typ)); | |
5256 | while Present (Prim_Elmt) loop | |
5257 | Prim := Node (Prim_Elmt); | |
5258 | ||
5259 | if Chars (Prim) = Name_uSize then | |
fc2907f6 | 5260 | Prim := Ultimate_Alias (Prim); |
cc60bd16 | 5261 | |
5262 | if Is_Abstract_Subprogram (Prim) then | |
fa6a6949 | 5263 | Size_Comp := |
cc60bd16 | 5264 | Unchecked_Convert_To (RTE (RE_Size_Ptr), |
83c6c069 | 5265 | New_Occurrence_Of (RTE (RE_Null_Address), Loc)); |
cc60bd16 | 5266 | else |
fa6a6949 | 5267 | Size_Comp := |
cc60bd16 | 5268 | Unchecked_Convert_To (RTE (RE_Size_Ptr), |
5269 | Make_Attribute_Reference (Loc, | |
83c6c069 | 5270 | Prefix => New_Occurrence_Of (Prim, Loc), |
fa6a6949 | 5271 | Attribute_Name => Name_Unrestricted_Access)); |
cc60bd16 | 5272 | end if; |
5273 | ||
5274 | exit; | |
5275 | end if; | |
5276 | ||
5277 | Next_Elmt (Prim_Elmt); | |
5278 | end loop; | |
fa6a6949 | 5279 | |
5280 | pragma Assert (Present (Size_Comp)); | |
5281 | Append_To (TSD_Aggr_List, Size_Comp); | |
cc60bd16 | 5282 | end; |
5283 | end if; | |
5284 | end if; | |
5285 | ||
725a69d2 | 5286 | -- Interfaces_Table (required for AI-405) |
5287 | ||
5288 | if RTE_Record_Component_Available (RE_Interfaces_Table) then | |
5289 | ||
5290 | -- Count the number of interface types implemented by Typ | |
5291 | ||
a652dd51 | 5292 | Collect_Interfaces (Typ, Typ_Ifaces); |
725a69d2 | 5293 | |
5294 | AI := First_Elmt (Typ_Ifaces); | |
5295 | while Present (AI) loop | |
5296 | Num_Ifaces := Num_Ifaces + 1; | |
5297 | Next_Elmt (AI); | |
5298 | end loop; | |
952af0b9 | 5299 | |
343d35dc | 5300 | if Num_Ifaces = 0 then |
725a69d2 | 5301 | Iface_Table_Node := Make_Null (Loc); |
952af0b9 | 5302 | |
725a69d2 | 5303 | -- Generate the Interface_Table object |
343d35dc | 5304 | |
5305 | else | |
725a69d2 | 5306 | declare |
17e14451 | 5307 | TSD_Ifaces_List : constant List_Id := New_List; |
cdb1c38f | 5308 | Elmt : Elmt_Id; |
5309 | Sec_DT_Tag : Node_Id; | |
725a69d2 | 5310 | |
5311 | begin | |
5312 | AI := First_Elmt (Typ_Ifaces); | |
5313 | while Present (AI) loop | |
cb4af01d | 5314 | if Is_Ancestor (Node (AI), Typ, Use_Full_View => True) then |
cdb1c38f | 5315 | Sec_DT_Tag := |
83c6c069 | 5316 | New_Occurrence_Of (DT_Ptr, Loc); |
cdb1c38f | 5317 | else |
acf97c11 | 5318 | Elmt := |
5319 | Next_Elmt | |
5320 | (Next_Elmt (First_Elmt (Access_Disp_Table (Typ)))); | |
cdb1c38f | 5321 | pragma Assert (Has_Thunks (Node (Elmt))); |
5322 | ||
d00681a7 | 5323 | while Is_Tag (Node (Elmt)) |
cdb1c38f | 5324 | and then not |
cb4af01d | 5325 | Is_Ancestor (Node (AI), Related_Type (Node (Elmt)), |
5326 | Use_Full_View => True) | |
cdb1c38f | 5327 | loop |
5328 | pragma Assert (Has_Thunks (Node (Elmt))); | |
5329 | Next_Elmt (Elmt); | |
acf97c11 | 5330 | pragma Assert (Has_Thunks (Node (Elmt))); |
5331 | Next_Elmt (Elmt); | |
5332 | pragma Assert (not Has_Thunks (Node (Elmt))); | |
5333 | Next_Elmt (Elmt); | |
cdb1c38f | 5334 | pragma Assert (not Has_Thunks (Node (Elmt))); |
5335 | Next_Elmt (Elmt); | |
5336 | end loop; | |
5337 | ||
5338 | pragma Assert (Ekind (Node (Elmt)) = E_Constant | |
acf97c11 | 5339 | and then not |
5340 | Has_Thunks (Node (Next_Elmt (Next_Elmt (Elmt))))); | |
cdb1c38f | 5341 | Sec_DT_Tag := |
83c6c069 | 5342 | New_Occurrence_Of (Node (Next_Elmt (Next_Elmt (Elmt))), |
acf97c11 | 5343 | Loc); |
cdb1c38f | 5344 | end if; |
5345 | ||
17e14451 | 5346 | Append_To (TSD_Ifaces_List, |
5347 | Make_Aggregate (Loc, | |
5348 | Expressions => New_List ( | |
5349 | ||
5350 | -- Iface_Tag | |
5351 | ||
24971415 | 5352 | Unchecked_Convert_To (RTE (RE_Tag), |
83c6c069 | 5353 | New_Occurrence_Of |
725a69d2 | 5354 | (Node (First_Elmt (Access_Disp_Table (Node (AI)))), |
17e14451 | 5355 | Loc)), |
725a69d2 | 5356 | |
17e14451 | 5357 | -- Static_Offset_To_Top |
725a69d2 | 5358 | |
83c6c069 | 5359 | New_Occurrence_Of (Standard_True, Loc), |
725a69d2 | 5360 | |
17e14451 | 5361 | -- Offset_To_Top_Value |
5362 | ||
5363 | Make_Integer_Literal (Loc, 0), | |
5364 | ||
5365 | -- Offset_To_Top_Func | |
5366 | ||
cdb1c38f | 5367 | Make_Null (Loc), |
5368 | ||
5369 | -- Secondary_DT | |
5370 | ||
5371 | Unchecked_Convert_To (RTE (RE_Tag), Sec_DT_Tag) | |
5372 | ||
5373 | ))); | |
725a69d2 | 5374 | |
725a69d2 | 5375 | Next_Elmt (AI); |
5376 | end loop; | |
725a69d2 | 5377 | |
17e14451 | 5378 | Name_ITable := New_External_Name (Tname, 'I'); |
5379 | ITable := Make_Defining_Identifier (Loc, Name_ITable); | |
2ea346ac | 5380 | Set_Is_Statically_Allocated (ITable, |
5381 | Is_Library_Level_Tagged_Type (Typ)); | |
725a69d2 | 5382 | |
17e14451 | 5383 | -- The table of interfaces is not constant; its slots are |
0c826ed4 | 5384 | -- filled at run time by the IP routine using attribute |
17e14451 | 5385 | -- 'Position to know the location of the tag components |
5386 | -- (and this attribute cannot be safely used before the | |
5387 | -- object is initialized). | |
725a69d2 | 5388 | |
17e14451 | 5389 | Append_To (Result, |
5390 | Make_Object_Declaration (Loc, | |
5391 | Defining_Identifier => ITable, | |
5392 | Aliased_Present => True, | |
5393 | Constant_Present => False, | |
5394 | Object_Definition => | |
5395 | Make_Subtype_Indication (Loc, | |
5396 | Subtype_Mark => | |
83c6c069 | 5397 | New_Occurrence_Of (RTE (RE_Interface_Data), Loc), |
17e14451 | 5398 | Constraint => Make_Index_Or_Discriminant_Constraint |
5399 | (Loc, | |
5400 | Constraints => New_List ( | |
5401 | Make_Integer_Literal (Loc, Num_Ifaces)))), | |
725a69d2 | 5402 | |
17e14451 | 5403 | Expression => Make_Aggregate (Loc, |
5404 | Expressions => New_List ( | |
5405 | Make_Integer_Literal (Loc, Num_Ifaces), | |
5406 | Make_Aggregate (Loc, | |
5407 | Expressions => TSD_Ifaces_List))))); | |
725a69d2 | 5408 | |
17e14451 | 5409 | Append_To (Result, |
5410 | Make_Attribute_Definition_Clause (Loc, | |
83c6c069 | 5411 | Name => New_Occurrence_Of (ITable, Loc), |
17e14451 | 5412 | Chars => Name_Alignment, |
5413 | Expression => | |
5414 | Make_Attribute_Reference (Loc, | |
5415 | Prefix => | |
83c6c069 | 5416 | New_Occurrence_Of (RTE (RE_Integer_Address), Loc), |
17e14451 | 5417 | Attribute_Name => Name_Alignment))); |
725a69d2 | 5418 | |
17e14451 | 5419 | Iface_Table_Node := |
5420 | Make_Attribute_Reference (Loc, | |
83c6c069 | 5421 | Prefix => New_Occurrence_Of (ITable, Loc), |
17e14451 | 5422 | Attribute_Name => Name_Unchecked_Access); |
5423 | end; | |
725a69d2 | 5424 | end if; |
5425 | ||
17e14451 | 5426 | Append_To (TSD_Aggr_List, Iface_Table_Node); |
725a69d2 | 5427 | end if; |
5428 | ||
5429 | -- Generate the Select Specific Data table for synchronized types that | |
5430 | -- implement synchronized interfaces. The size of the table is | |
5431 | -- constrained by the number of non-predefined primitive operations. | |
5432 | ||
5433 | if RTE_Record_Component_Available (RE_SSD) then | |
de54c5ab | 5434 | if Ada_Version >= Ada_2005 |
24971415 | 5435 | and then Has_DT (Typ) |
725a69d2 | 5436 | and then Is_Concurrent_Record_Type (Typ) |
a652dd51 | 5437 | and then Has_Interfaces (Typ) |
725a69d2 | 5438 | and then Nb_Prim > 0 |
5439 | and then not Is_Abstract_Type (Typ) | |
5440 | and then not Is_Controlled (Typ) | |
5441 | and then not Restriction_Active (No_Dispatching_Calls) | |
f38c8084 | 5442 | and then not Restriction_Active (No_Select_Statements) |
725a69d2 | 5443 | then |
343d35dc | 5444 | Append_To (Result, |
5445 | Make_Object_Declaration (Loc, | |
725a69d2 | 5446 | Defining_Identifier => SSD, |
343d35dc | 5447 | Aliased_Present => True, |
5448 | Object_Definition => | |
5449 | Make_Subtype_Indication (Loc, | |
83c6c069 | 5450 | Subtype_Mark => New_Occurrence_Of ( |
725a69d2 | 5451 | RTE (RE_Select_Specific_Data), Loc), |
5452 | Constraint => | |
5453 | Make_Index_Or_Discriminant_Constraint (Loc, | |
5454 | Constraints => New_List ( | |
5455 | Make_Integer_Literal (Loc, Nb_Prim)))))); | |
5456 | ||
17e14451 | 5457 | Append_To (Result, |
5458 | Make_Attribute_Definition_Clause (Loc, | |
83c6c069 | 5459 | Name => New_Occurrence_Of (SSD, Loc), |
17e14451 | 5460 | Chars => Name_Alignment, |
5461 | Expression => | |
5462 | Make_Attribute_Reference (Loc, | |
5463 | Prefix => | |
83c6c069 | 5464 | New_Occurrence_Of (RTE (RE_Integer_Address), Loc), |
17e14451 | 5465 | Attribute_Name => Name_Alignment))); |
5466 | ||
725a69d2 | 5467 | -- This table is initialized by Make_Select_Specific_Data_Table, |
5468 | -- which calls Set_Entry_Index and Set_Prim_Op_Kind. | |
5469 | ||
5470 | Append_To (TSD_Aggr_List, | |
17e14451 | 5471 | Make_Attribute_Reference (Loc, |
83c6c069 | 5472 | Prefix => New_Occurrence_Of (SSD, Loc), |
17e14451 | 5473 | Attribute_Name => Name_Unchecked_Access)); |
725a69d2 | 5474 | else |
17e14451 | 5475 | Append_To (TSD_Aggr_List, Make_Null (Loc)); |
343d35dc | 5476 | end if; |
952af0b9 | 5477 | end if; |
5478 | ||
725a69d2 | 5479 | -- Initialize the table of ancestor tags. In case of interface types |
5480 | -- this table is not needed. | |
d62940bf | 5481 | |
cc60bd16 | 5482 | TSD_Tags_List := New_List; |
952af0b9 | 5483 | |
cc60bd16 | 5484 | -- If we are not statically allocating the dispatch table then we must |
5485 | -- fill position 0 with null because we still have not generated the | |
5486 | -- tag of Typ. | |
343d35dc | 5487 | |
cc60bd16 | 5488 | if not Building_Static_DT (Typ) |
5489 | or else Is_Interface (Typ) | |
5490 | then | |
5491 | Append_To (TSD_Tags_List, | |
5492 | Unchecked_Convert_To (RTE (RE_Tag), | |
83c6c069 | 5493 | New_Occurrence_Of (RTE (RE_Null_Address), Loc))); |
343d35dc | 5494 | |
cc60bd16 | 5495 | -- Otherwise we can safely reference the tag |
343d35dc | 5496 | |
cc60bd16 | 5497 | else |
5498 | Append_To (TSD_Tags_List, | |
83c6c069 | 5499 | New_Occurrence_Of (DT_Ptr, Loc)); |
cc60bd16 | 5500 | end if; |
343d35dc | 5501 | |
cc60bd16 | 5502 | -- Fill the rest of the table with the tags of the ancestors |
343d35dc | 5503 | |
cc60bd16 | 5504 | declare |
5505 | Current_Typ : Entity_Id; | |
5506 | Parent_Typ : Entity_Id; | |
5507 | Pos : Nat; | |
725a69d2 | 5508 | |
cc60bd16 | 5509 | begin |
17e14451 | 5510 | Pos := 1; |
5511 | Current_Typ := Typ; | |
725a69d2 | 5512 | |
17e14451 | 5513 | loop |
5514 | Parent_Typ := Etype (Current_Typ); | |
343d35dc | 5515 | |
17e14451 | 5516 | if Is_Private_Type (Parent_Typ) then |
5517 | Parent_Typ := Full_View (Base_Type (Parent_Typ)); | |
5518 | end if; | |
5519 | ||
5520 | exit when Parent_Typ = Current_Typ; | |
5521 | ||
7ac0f4a5 | 5522 | if Is_CPP_Class (Parent_Typ) then |
5523 | ||
17e14451 | 5524 | -- The tags defined in the C++ side will be inherited when |
5525 | -- the object is constructed (Exp_Ch3.Build_Init_Procedure) | |
5526 | ||
5527 | Append_To (TSD_Tags_List, | |
5528 | Unchecked_Convert_To (RTE (RE_Tag), | |
83c6c069 | 5529 | New_Occurrence_Of (RTE (RE_Null_Address), Loc))); |
17e14451 | 5530 | else |
5531 | Append_To (TSD_Tags_List, | |
83c6c069 | 5532 | New_Occurrence_Of |
17e14451 | 5533 | (Node (First_Elmt (Access_Disp_Table (Parent_Typ))), |
5534 | Loc)); | |
5535 | end if; | |
5536 | ||
5537 | Pos := Pos + 1; | |
5538 | Current_Typ := Parent_Typ; | |
5539 | end loop; | |
5540 | ||
5541 | pragma Assert (Pos = I_Depth + 1); | |
5542 | end; | |
5543 | ||
5544 | Append_To (TSD_Aggr_List, | |
5545 | Make_Aggregate (Loc, | |
5546 | Expressions => TSD_Tags_List)); | |
343d35dc | 5547 | |
725a69d2 | 5548 | -- Build the TSD object |
343d35dc | 5549 | |
5550 | Append_To (Result, | |
5551 | Make_Object_Declaration (Loc, | |
5552 | Defining_Identifier => TSD, | |
5553 | Aliased_Present => True, | |
24971415 | 5554 | Constant_Present => Building_Static_DT (Typ), |
343d35dc | 5555 | Object_Definition => |
5556 | Make_Subtype_Indication (Loc, | |
83c6c069 | 5557 | Subtype_Mark => New_Occurrence_Of ( |
343d35dc | 5558 | RTE (RE_Type_Specific_Data), Loc), |
5559 | Constraint => | |
5560 | Make_Index_Or_Discriminant_Constraint (Loc, | |
5561 | Constraints => New_List ( | |
5562 | Make_Integer_Literal (Loc, I_Depth)))), | |
725a69d2 | 5563 | |
343d35dc | 5564 | Expression => Make_Aggregate (Loc, |
17e14451 | 5565 | Expressions => TSD_Aggr_List))); |
343d35dc | 5566 | |
24971415 | 5567 | Set_Is_True_Constant (TSD, Building_Static_DT (Typ)); |
5568 | ||
343d35dc | 5569 | Append_To (Result, |
5570 | Make_Attribute_Definition_Clause (Loc, | |
83c6c069 | 5571 | Name => New_Occurrence_Of (TSD, Loc), |
343d35dc | 5572 | Chars => Name_Alignment, |
5573 | Expression => | |
5574 | Make_Attribute_Reference (Loc, | |
83c6c069 | 5575 | Prefix => New_Occurrence_Of (RTE (RE_Integer_Address), Loc), |
343d35dc | 5576 | Attribute_Name => Name_Alignment))); |
5577 | ||
24971415 | 5578 | -- Initialize or declare the dispatch table object |
343d35dc | 5579 | |
24971415 | 5580 | if not Has_DT (Typ) then |
725a69d2 | 5581 | DT_Constr_List := New_List; |
5582 | DT_Aggr_List := New_List; | |
343d35dc | 5583 | |
725a69d2 | 5584 | -- Typeinfo |
952af0b9 | 5585 | |
725a69d2 | 5586 | New_Node := |
5587 | Make_Attribute_Reference (Loc, | |
83c6c069 | 5588 | Prefix => New_Occurrence_Of (TSD, Loc), |
725a69d2 | 5589 | Attribute_Name => Name_Address); |
5590 | ||
5591 | Append_To (DT_Constr_List, New_Node); | |
5592 | Append_To (DT_Aggr_List, New_Copy (New_Node)); | |
5593 | Append_To (DT_Aggr_List, Make_Integer_Literal (Loc, 0)); | |
5594 | ||
5595 | -- In case of locally defined tagged types we have already declared | |
5596 | -- and uninitialized object for the dispatch table, which is now | |
24971415 | 5597 | -- initialized by means of the following assignment: |
5598 | ||
5599 | -- DT := (TSD'Address, 0); | |
725a69d2 | 5600 | |
24971415 | 5601 | if not Building_Static_DT (Typ) then |
725a69d2 | 5602 | Append_To (Result, |
5603 | Make_Assignment_Statement (Loc, | |
83c6c069 | 5604 | Name => New_Occurrence_Of (DT, Loc), |
725a69d2 | 5605 | Expression => Make_Aggregate (Loc, |
5606 | Expressions => DT_Aggr_List))); | |
5607 | ||
24971415 | 5608 | -- In case of library level tagged types we declare and export now |
5609 | -- the constant object containing the dummy dispatch table. There | |
5610 | -- is no need to declare the tag here because it has been previously | |
5611 | -- declared by Make_Tags | |
5612 | ||
5613 | -- DT : aliased constant No_Dispatch_Table := | |
5614 | -- (NDT_TSD => TSD'Address; | |
5615 | -- NDT_Prims_Ptr => 0); | |
5616 | -- for DT'Alignment use Address'Alignment; | |
725a69d2 | 5617 | |
5618 | else | |
5619 | Append_To (Result, | |
5620 | Make_Object_Declaration (Loc, | |
5621 | Defining_Identifier => DT, | |
5622 | Aliased_Present => True, | |
17e14451 | 5623 | Constant_Present => True, |
725a69d2 | 5624 | Object_Definition => |
83c6c069 | 5625 | New_Occurrence_Of (RTE (RE_No_Dispatch_Table_Wrapper), Loc), |
725a69d2 | 5626 | Expression => Make_Aggregate (Loc, |
5627 | Expressions => DT_Aggr_List))); | |
5628 | ||
17e14451 | 5629 | Append_To (Result, |
5630 | Make_Attribute_Definition_Clause (Loc, | |
83c6c069 | 5631 | Name => New_Occurrence_Of (DT, Loc), |
17e14451 | 5632 | Chars => Name_Alignment, |
5633 | Expression => | |
5634 | Make_Attribute_Reference (Loc, | |
5635 | Prefix => | |
83c6c069 | 5636 | New_Occurrence_Of (RTE (RE_Integer_Address), Loc), |
17e14451 | 5637 | Attribute_Name => Name_Alignment))); |
5638 | ||
24971415 | 5639 | Export_DT (Typ, DT); |
725a69d2 | 5640 | end if; |
5641 | ||
5642 | -- Common case: Typ has a dispatch table | |
5643 | ||
5644 | -- Generate: | |
5645 | ||
5646 | -- Predef_Prims : Address_Array (1 .. Default_Prim_Ops_Count) := | |
5647 | -- (predef-prim-op-1'address, | |
5648 | -- predef-prim-op-2'address, | |
5649 | -- ... | |
5650 | -- predef-prim-op-n'address); | |
5651 | -- for Predef_Prims'Alignment use Address'Alignment | |
5652 | ||
5653 | -- DT : Dispatch_Table (Nb_Prims) := | |
5654 | -- (Signature => <sig-value>, | |
5655 | -- Tag_Kind => <tag_kind-value>, | |
5656 | -- Predef_Prims => Predef_Prims'First'Address, | |
5657 | -- Offset_To_Top => 0, | |
5658 | -- TSD => TSD'Address; | |
5659 | -- Prims_Ptr => (prim-op-1'address, | |
5660 | -- prim-op-2'address, | |
5661 | -- ... | |
5662 | -- prim-op-n'address)); | |
17e14451 | 5663 | -- for DT'Alignment use Address'Alignment |
725a69d2 | 5664 | |
5665 | else | |
5666 | declare | |
5667 | Pos : Nat; | |
5668 | ||
5669 | begin | |
24971415 | 5670 | if not Building_Static_DT (Typ) then |
725a69d2 | 5671 | Nb_Predef_Prims := Max_Predef_Prims; |
5672 | ||
5673 | else | |
5674 | Prim_Elmt := First_Elmt (Primitive_Operations (Typ)); | |
5675 | while Present (Prim_Elmt) loop | |
5676 | Prim := Node (Prim_Elmt); | |
5677 | ||
5678 | if Is_Predefined_Dispatching_Operation (Prim) | |
5679 | and then not Is_Abstract_Subprogram (Prim) | |
5680 | then | |
5681 | Pos := UI_To_Int (DT_Position (Prim)); | |
5682 | ||
5683 | if Pos > Nb_Predef_Prims then | |
5684 | Nb_Predef_Prims := Pos; | |
5685 | end if; | |
5686 | end if; | |
5687 | ||
5688 | Next_Elmt (Prim_Elmt); | |
5689 | end loop; | |
5690 | end if; | |
5691 | ||
5692 | declare | |
5693 | Prim_Table : array | |
5694 | (Nat range 1 .. Nb_Predef_Prims) of Entity_Id; | |
cc60bd16 | 5695 | Decl : Node_Id; |
725a69d2 | 5696 | E : Entity_Id; |
5697 | ||
5698 | begin | |
5699 | Prim_Ops_Aggr_List := New_List; | |
5700 | ||
5701 | Prim_Table := (others => Empty); | |
17e14451 | 5702 | |
cdb1c38f | 5703 | if Building_Static_DT (Typ) then |
5704 | Prim_Elmt := First_Elmt (Primitive_Operations (Typ)); | |
5705 | while Present (Prim_Elmt) loop | |
5706 | Prim := Node (Prim_Elmt); | |
725a69d2 | 5707 | |
cdb1c38f | 5708 | if Is_Predefined_Dispatching_Operation (Prim) |
5709 | and then not Is_Abstract_Subprogram (Prim) | |
3f8cf2d2 | 5710 | and then not Is_Eliminated (Prim) |
cdb1c38f | 5711 | and then not Present (Prim_Table |
5712 | (UI_To_Int (DT_Position (Prim)))) | |
5713 | then | |
fc2907f6 | 5714 | E := Ultimate_Alias (Prim); |
cdb1c38f | 5715 | pragma Assert (not Is_Abstract_Subprogram (E)); |
5716 | Prim_Table (UI_To_Int (DT_Position (Prim))) := E; | |
5717 | end if; | |
725a69d2 | 5718 | |
cdb1c38f | 5719 | Next_Elmt (Prim_Elmt); |
5720 | end loop; | |
5721 | end if; | |
725a69d2 | 5722 | |
5723 | for J in Prim_Table'Range loop | |
5724 | if Present (Prim_Table (J)) then | |
5725 | New_Node := | |
cc60bd16 | 5726 | Unchecked_Convert_To (RTE (RE_Prim_Ptr), |
acf97c11 | 5727 | Make_Attribute_Reference (Loc, |
83c6c069 | 5728 | Prefix => New_Occurrence_Of (Prim_Table (J), Loc), |
acf97c11 | 5729 | Attribute_Name => Name_Unrestricted_Access)); |
725a69d2 | 5730 | else |
cc60bd16 | 5731 | New_Node := Make_Null (Loc); |
725a69d2 | 5732 | end if; |
5733 | ||
5734 | Append_To (Prim_Ops_Aggr_List, New_Node); | |
5735 | end loop; | |
343d35dc | 5736 | |
cc60bd16 | 5737 | New_Node := |
5738 | Make_Aggregate (Loc, | |
5739 | Expressions => Prim_Ops_Aggr_List); | |
5740 | ||
5741 | Decl := | |
5742 | Make_Subtype_Declaration (Loc, | |
ec97ce79 | 5743 | Defining_Identifier => Make_Temporary (Loc, 'S'), |
5744 | Subtype_Indication => | |
83c6c069 | 5745 | New_Occurrence_Of (RTE (RE_Address_Array), Loc)); |
cc60bd16 | 5746 | |
5747 | Append_To (Result, Decl); | |
5748 | ||
68f95949 | 5749 | Append_To (Result, |
5750 | Make_Object_Declaration (Loc, | |
725a69d2 | 5751 | Defining_Identifier => Predef_Prims, |
68f95949 | 5752 | Aliased_Present => True, |
24971415 | 5753 | Constant_Present => Building_Static_DT (Typ), |
83c6c069 | 5754 | Object_Definition => New_Occurrence_Of |
cc60bd16 | 5755 | (Defining_Identifier (Decl), Loc), |
5756 | Expression => New_Node)); | |
5757 | ||
5758 | -- Remember aggregates initializing dispatch tables | |
5759 | ||
5760 | Append_Elmt (New_Node, DT_Aggr); | |
725a69d2 | 5761 | |
5762 | Append_To (Result, | |
5763 | Make_Attribute_Definition_Clause (Loc, | |
83c6c069 | 5764 | Name => New_Occurrence_Of (Predef_Prims, Loc), |
725a69d2 | 5765 | Chars => Name_Alignment, |
5766 | Expression => | |
5767 | Make_Attribute_Reference (Loc, | |
5768 | Prefix => | |
83c6c069 | 5769 | New_Occurrence_Of (RTE (RE_Integer_Address), Loc), |
725a69d2 | 5770 | Attribute_Name => Name_Alignment))); |
5771 | end; | |
5772 | end; | |
5773 | ||
5774 | -- Stage 1: Initialize the discriminant and the record components | |
5775 | ||
5776 | DT_Constr_List := New_List; | |
5777 | DT_Aggr_List := New_List; | |
5778 | ||
5779 | -- Num_Prims. If the tagged type has no primitives we add a dummy | |
5780 | -- slot whose address will be the tag of this type. | |
5781 | ||
5782 | if Nb_Prim = 0 then | |
5783 | New_Node := Make_Integer_Literal (Loc, 1); | |
5784 | else | |
5785 | New_Node := Make_Integer_Literal (Loc, Nb_Prim); | |
5786 | end if; | |
5787 | ||
5788 | Append_To (DT_Constr_List, New_Node); | |
5789 | Append_To (DT_Aggr_List, New_Copy (New_Node)); | |
5790 | ||
5791 | -- Signature | |
5792 | ||
5793 | if RTE_Record_Component_Available (RE_Signature) then | |
5794 | Append_To (DT_Aggr_List, | |
83c6c069 | 5795 | New_Occurrence_Of (RTE (RE_Primary_DT), Loc)); |
725a69d2 | 5796 | end if; |
5797 | ||
5798 | -- Tag_Kind | |
5799 | ||
5800 | if RTE_Record_Component_Available (RE_Tag_Kind) then | |
5801 | Append_To (DT_Aggr_List, Tagged_Kind (Typ)); | |
5802 | end if; | |
5803 | ||
5804 | -- Predef_Prims | |
5805 | ||
5806 | Append_To (DT_Aggr_List, | |
5807 | Make_Attribute_Reference (Loc, | |
83c6c069 | 5808 | Prefix => New_Occurrence_Of (Predef_Prims, Loc), |
725a69d2 | 5809 | Attribute_Name => Name_Address)); |
5810 | ||
5811 | -- Offset_To_Top | |
5812 | ||
cc60bd16 | 5813 | Append_To (DT_Aggr_List, Make_Integer_Literal (Loc, 0)); |
725a69d2 | 5814 | |
5815 | -- Typeinfo | |
5816 | ||
5817 | Append_To (DT_Aggr_List, | |
5818 | Make_Attribute_Reference (Loc, | |
83c6c069 | 5819 | Prefix => New_Occurrence_Of (TSD, Loc), |
725a69d2 | 5820 | Attribute_Name => Name_Address)); |
5821 | ||
f117057b | 5822 | -- Stage 2: Initialize the table of user-defined primitive operations |
725a69d2 | 5823 | |
5824 | Prim_Ops_Aggr_List := New_List; | |
5825 | ||
5826 | if Nb_Prim = 0 then | |
cc60bd16 | 5827 | Append_To (Prim_Ops_Aggr_List, Make_Null (Loc)); |
725a69d2 | 5828 | |
9a479e51 | 5829 | elsif not Building_Static_DT (Typ) then |
725a69d2 | 5830 | for J in 1 .. Nb_Prim loop |
cc60bd16 | 5831 | Append_To (Prim_Ops_Aggr_List, Make_Null (Loc)); |
725a69d2 | 5832 | end loop; |
5833 | ||
5834 | else | |
5835 | declare | |
d00681a7 | 5836 | CPP_Nb_Prims : constant Nat := CPP_Num_Prims (Typ); |
5837 | E : Entity_Id; | |
5838 | Prim : Entity_Id; | |
5839 | Prim_Elmt : Elmt_Id; | |
5840 | Prim_Pos : Nat; | |
5841 | Prim_Table : array (Nat range 1 .. Nb_Prim) of Entity_Id; | |
725a69d2 | 5842 | |
5843 | begin | |
5844 | Prim_Table := (others => Empty); | |
cdb1c38f | 5845 | |
5846 | Prim_Elmt := First_Elmt (Primitive_Operations (Typ)); | |
725a69d2 | 5847 | while Present (Prim_Elmt) loop |
5848 | Prim := Node (Prim_Elmt); | |
5849 | ||
9429b6e9 | 5850 | -- Retrieve the ultimate alias of the primitive for proper |
5851 | -- handling of renamings and eliminated primitives. | |
5852 | ||
d00681a7 | 5853 | E := Ultimate_Alias (Prim); |
5854 | Prim_Pos := UI_To_Int (DT_Position (E)); | |
9429b6e9 | 5855 | |
3f8cf2d2 | 5856 | -- Do not reference predefined primitives because they are |
5857 | -- located in a separate dispatch table; skip entities with | |
5858 | -- attribute Interface_Alias because they are only required | |
d00681a7 | 5859 | -- to build secondary dispatch tables; skip abstract and |
5860 | -- eliminated primitives; for derivations of CPP types skip | |
5861 | -- primitives located in the C++ part of the dispatch table | |
5862 | -- because their slot is initialized by the IC routine. | |
725a69d2 | 5863 | |
3f8cf2d2 | 5864 | if not Is_Predefined_Dispatching_Operation (Prim) |
5865 | and then not Is_Predefined_Dispatching_Operation (E) | |
5866 | and then not Present (Interface_Alias (Prim)) | |
5867 | and then not Is_Abstract_Subprogram (E) | |
3f8cf2d2 | 5868 | and then not Is_Eliminated (E) |
d00681a7 | 5869 | and then (not Is_CPP_Class (Root_Type (Typ)) |
5870 | or else Prim_Pos > CPP_Nb_Prims) | |
3f8cf2d2 | 5871 | then |
5872 | pragma Assert | |
5873 | (UI_To_Int (DT_Position (Prim)) <= Nb_Prim); | |
5874 | ||
5875 | Prim_Table (UI_To_Int (DT_Position (Prim))) := E; | |
725a69d2 | 5876 | end if; |
5877 | ||
5878 | Next_Elmt (Prim_Elmt); | |
5879 | end loop; | |
5880 | ||
5881 | for J in Prim_Table'Range loop | |
5882 | if Present (Prim_Table (J)) then | |
5883 | New_Node := | |
cc60bd16 | 5884 | Unchecked_Convert_To (RTE (RE_Prim_Ptr), |
acf97c11 | 5885 | Make_Attribute_Reference (Loc, |
83c6c069 | 5886 | Prefix => New_Occurrence_Of (Prim_Table (J), Loc), |
acf97c11 | 5887 | Attribute_Name => Name_Unrestricted_Access)); |
725a69d2 | 5888 | else |
cc60bd16 | 5889 | New_Node := Make_Null (Loc); |
725a69d2 | 5890 | end if; |
5891 | ||
5892 | Append_To (Prim_Ops_Aggr_List, New_Node); | |
5893 | end loop; | |
5894 | end; | |
5895 | end if; | |
5896 | ||
cc60bd16 | 5897 | New_Node := |
725a69d2 | 5898 | Make_Aggregate (Loc, |
cc60bd16 | 5899 | Expressions => Prim_Ops_Aggr_List); |
5900 | ||
5901 | Append_To (DT_Aggr_List, New_Node); | |
5902 | ||
5903 | -- Remember aggregates initializing dispatch tables | |
5904 | ||
5905 | Append_Elmt (New_Node, DT_Aggr); | |
725a69d2 | 5906 | |
5907 | -- In case of locally defined tagged types we have already declared | |
5908 | -- and uninitialized object for the dispatch table, which is now | |
5909 | -- initialized by means of an assignment. | |
5910 | ||
24971415 | 5911 | if not Building_Static_DT (Typ) then |
725a69d2 | 5912 | Append_To (Result, |
5913 | Make_Assignment_Statement (Loc, | |
83c6c069 | 5914 | Name => New_Occurrence_Of (DT, Loc), |
725a69d2 | 5915 | Expression => Make_Aggregate (Loc, |
5916 | Expressions => DT_Aggr_List))); | |
5917 | ||
24971415 | 5918 | -- In case of library level tagged types we declare now and export |
5919 | -- the constant object containing the dispatch table. | |
725a69d2 | 5920 | |
5921 | else | |
5922 | Append_To (Result, | |
5923 | Make_Object_Declaration (Loc, | |
5924 | Defining_Identifier => DT, | |
5925 | Aliased_Present => True, | |
17e14451 | 5926 | Constant_Present => True, |
725a69d2 | 5927 | Object_Definition => |
5928 | Make_Subtype_Indication (Loc, | |
83c6c069 | 5929 | Subtype_Mark => New_Occurrence_Of |
725a69d2 | 5930 | (RTE (RE_Dispatch_Table_Wrapper), Loc), |
5931 | Constraint => Make_Index_Or_Discriminant_Constraint (Loc, | |
5932 | Constraints => DT_Constr_List)), | |
5933 | Expression => Make_Aggregate (Loc, | |
5934 | Expressions => DT_Aggr_List))); | |
5935 | ||
5936 | Append_To (Result, | |
5937 | Make_Attribute_Definition_Clause (Loc, | |
83c6c069 | 5938 | Name => New_Occurrence_Of (DT, Loc), |
725a69d2 | 5939 | Chars => Name_Alignment, |
5940 | Expression => | |
5941 | Make_Attribute_Reference (Loc, | |
5942 | Prefix => | |
83c6c069 | 5943 | New_Occurrence_Of (RTE (RE_Integer_Address), Loc), |
725a69d2 | 5944 | Attribute_Name => Name_Alignment))); |
5945 | ||
24971415 | 5946 | Export_DT (Typ, DT); |
952af0b9 | 5947 | end if; |
76a1c25b | 5948 | end if; |
d62940bf | 5949 | |
f301a57b | 5950 | -- Initialize the table of ancestor tags if not building static |
5951 | -- dispatch table | |
725a69d2 | 5952 | |
24971415 | 5953 | if not Building_Static_DT (Typ) |
17e14451 | 5954 | and then not Is_Interface (Typ) |
725a69d2 | 5955 | and then not Is_CPP_Class (Typ) |
5956 | then | |
5957 | Append_To (Result, | |
5958 | Make_Assignment_Statement (Loc, | |
5959 | Name => | |
5960 | Make_Indexed_Component (Loc, | |
5961 | Prefix => | |
5962 | Make_Selected_Component (Loc, | |
5963 | Prefix => | |
83c6c069 | 5964 | New_Occurrence_Of (TSD, Loc), |
725a69d2 | 5965 | Selector_Name => |
83c6c069 | 5966 | New_Occurrence_Of |
725a69d2 | 5967 | (RTE_Record_Component (RE_Tags_Table), Loc)), |
5968 | Expressions => | |
5969 | New_List (Make_Integer_Literal (Loc, 0))), | |
5970 | ||
5971 | Expression => | |
83c6c069 | 5972 | New_Occurrence_Of |
725a69d2 | 5973 | (Node (First_Elmt (Access_Disp_Table (Typ))), Loc))); |
5974 | end if; | |
5975 | ||
f301a57b | 5976 | -- Inherit the dispatch tables of the parent. There is no need to |
5977 | -- inherit anything from the parent when building static dispatch tables | |
5978 | -- because the whole dispatch table (including inherited primitives) has | |
5979 | -- been already built. | |
acf97c11 | 5980 | |
9a479e51 | 5981 | if Building_Static_DT (Typ) then |
725a69d2 | 5982 | null; |
5983 | ||
af647dc7 | 5984 | -- If the ancestor is a CPP_Class type we inherit the dispatch tables |
5985 | -- in the init proc, and we don't need to fill them in here. | |
d62940bf | 5986 | |
cc60bd16 | 5987 | elsif Is_CPP_Class (Parent_Typ) then |
af647dc7 | 5988 | null; |
d62940bf | 5989 | |
acf97c11 | 5990 | -- Otherwise we fill in the dispatch tables here |
d62940bf | 5991 | |
af647dc7 | 5992 | else |
cc60bd16 | 5993 | if Typ /= Parent_Typ |
af647dc7 | 5994 | and then not Is_Interface (Typ) |
5995 | and then not Restriction_Active (No_Dispatching_Calls) | |
68f95949 | 5996 | then |
343d35dc | 5997 | -- Inherit the dispatch table |
d62940bf | 5998 | |
acf97c11 | 5999 | if not Is_Interface (Typ) |
cc60bd16 | 6000 | and then not Is_Interface (Parent_Typ) |
6001 | and then not Is_CPP_Class (Parent_Typ) | |
acf97c11 | 6002 | then |
6003 | declare | |
6004 | Nb_Prims : constant Int := | |
6005 | UI_To_Int (DT_Entry_Count | |
cc60bd16 | 6006 | (First_Tag_Component (Parent_Typ))); |
6007 | ||
acf97c11 | 6008 | begin |
6009 | Append_To (Elab_Code, | |
6010 | Build_Inherit_Predefined_Prims (Loc, | |
6011 | Old_Tag_Node => | |
83c6c069 | 6012 | New_Occurrence_Of |
acf97c11 | 6013 | (Node |
6014 | (Next_Elmt | |
6015 | (First_Elmt | |
cc60bd16 | 6016 | (Access_Disp_Table (Parent_Typ)))), Loc), |
acf97c11 | 6017 | New_Tag_Node => |
83c6c069 | 6018 | New_Occurrence_Of |
acf97c11 | 6019 | (Node |
6020 | (Next_Elmt | |
6021 | (First_Elmt | |
6022 | (Access_Disp_Table (Typ)))), Loc))); | |
6023 | ||
6024 | if Nb_Prims /= 0 then | |
725a69d2 | 6025 | Append_To (Elab_Code, |
acf97c11 | 6026 | Build_Inherit_Prims (Loc, |
6027 | Typ => Typ, | |
6028 | Old_Tag_Node => | |
83c6c069 | 6029 | New_Occurrence_Of |
acf97c11 | 6030 | (Node |
6031 | (First_Elmt | |
cc60bd16 | 6032 | (Access_Disp_Table (Parent_Typ))), Loc), |
83c6c069 | 6033 | New_Tag_Node => New_Occurrence_Of (DT_Ptr, Loc), |
acf97c11 | 6034 | Num_Prims => Nb_Prims)); |
6035 | end if; | |
6036 | end; | |
af647dc7 | 6037 | end if; |
d62940bf | 6038 | |
af647dc7 | 6039 | -- Inherit the secondary dispatch tables of the ancestor |
d62940bf | 6040 | |
cc60bd16 | 6041 | if not Is_CPP_Class (Parent_Typ) then |
af647dc7 | 6042 | declare |
6043 | Sec_DT_Ancestor : Elmt_Id := | |
6044 | Next_Elmt | |
acf97c11 | 6045 | (Next_Elmt |
af647dc7 | 6046 | (First_Elmt |
cc60bd16 | 6047 | (Access_Disp_Table (Parent_Typ)))); |
af647dc7 | 6048 | Sec_DT_Typ : Elmt_Id := |
6049 | Next_Elmt | |
acf97c11 | 6050 | (Next_Elmt |
6051 | (First_Elmt | |
6052 | (Access_Disp_Table (Typ)))); | |
af647dc7 | 6053 | |
6054 | procedure Copy_Secondary_DTs (Typ : Entity_Id); | |
6055 | -- Local procedure required to climb through the ancestors | |
6056 | -- and copy the contents of all their secondary dispatch | |
6057 | -- tables. | |
6058 | ||
6059 | ------------------------ | |
6060 | -- Copy_Secondary_DTs -- | |
6061 | ------------------------ | |
6062 | ||
6063 | procedure Copy_Secondary_DTs (Typ : Entity_Id) is | |
6064 | E : Entity_Id; | |
6065 | Iface : Elmt_Id; | |
6066 | ||
6067 | begin | |
6068 | -- Climb to the ancestor (if any) handling private types | |
6069 | ||
6070 | if Present (Full_View (Etype (Typ))) then | |
6071 | if Full_View (Etype (Typ)) /= Typ then | |
6072 | Copy_Secondary_DTs (Full_View (Etype (Typ))); | |
6073 | end if; | |
d62940bf | 6074 | |
af647dc7 | 6075 | elsif Etype (Typ) /= Typ then |
6076 | Copy_Secondary_DTs (Etype (Typ)); | |
6077 | end if; | |
d62940bf | 6078 | |
a652dd51 | 6079 | if Present (Interfaces (Typ)) |
6080 | and then not Is_Empty_Elmt_List (Interfaces (Typ)) | |
af647dc7 | 6081 | then |
a652dd51 | 6082 | Iface := First_Elmt (Interfaces (Typ)); |
af647dc7 | 6083 | E := First_Entity (Typ); |
6084 | while Present (E) | |
6085 | and then Present (Node (Sec_DT_Ancestor)) | |
725a69d2 | 6086 | and then Ekind (Node (Sec_DT_Ancestor)) = E_Constant |
af647dc7 | 6087 | loop |
6088 | if Is_Tag (E) and then Chars (E) /= Name_uTag then | |
cdb1c38f | 6089 | declare |
6090 | Num_Prims : constant Int := | |
6091 | UI_To_Int (DT_Entry_Count (E)); | |
6092 | ||
6093 | begin | |
6094 | if not Is_Interface (Etype (Typ)) then | |
6095 | ||
6096 | -- Inherit first secondary dispatch table | |
6097 | ||
6098 | Append_To (Elab_Code, | |
6099 | Build_Inherit_Predefined_Prims (Loc, | |
6100 | Old_Tag_Node => | |
6101 | Unchecked_Convert_To (RTE (RE_Tag), | |
83c6c069 | 6102 | New_Occurrence_Of |
acf97c11 | 6103 | (Node |
6104 | (Next_Elmt (Sec_DT_Ancestor)), | |
6105 | Loc)), | |
cdb1c38f | 6106 | New_Tag_Node => |
6107 | Unchecked_Convert_To (RTE (RE_Tag), | |
83c6c069 | 6108 | New_Occurrence_Of |
acf97c11 | 6109 | (Node (Next_Elmt (Sec_DT_Typ)), |
6110 | Loc)))); | |
cdb1c38f | 6111 | |
6112 | if Num_Prims /= 0 then | |
6113 | Append_To (Elab_Code, | |
6114 | Build_Inherit_Prims (Loc, | |
6115 | Typ => Node (Iface), | |
6116 | Old_Tag_Node => | |
6117 | Unchecked_Convert_To | |
6118 | (RTE (RE_Tag), | |
83c6c069 | 6119 | New_Occurrence_Of |
cdb1c38f | 6120 | (Node (Sec_DT_Ancestor), |
6121 | Loc)), | |
6122 | New_Tag_Node => | |
6123 | Unchecked_Convert_To | |
6124 | (RTE (RE_Tag), | |
83c6c069 | 6125 | New_Occurrence_Of |
cdb1c38f | 6126 | (Node (Sec_DT_Typ), Loc)), |
6127 | Num_Prims => Num_Prims)); | |
6128 | end if; | |
6129 | end if; | |
6130 | ||
6131 | Next_Elmt (Sec_DT_Ancestor); | |
6132 | Next_Elmt (Sec_DT_Typ); | |
343d35dc | 6133 | |
acf97c11 | 6134 | -- Skip the secondary dispatch table of |
6135 | -- predefined primitives | |
6136 | ||
6137 | Next_Elmt (Sec_DT_Ancestor); | |
6138 | Next_Elmt (Sec_DT_Typ); | |
6139 | ||
cdb1c38f | 6140 | if not Is_Interface (Etype (Typ)) then |
6141 | ||
6142 | -- Inherit second secondary dispatch table | |
343d35dc | 6143 | |
343d35dc | 6144 | Append_To (Elab_Code, |
6145 | Build_Inherit_Predefined_Prims (Loc, | |
6146 | Old_Tag_Node => | |
6147 | Unchecked_Convert_To (RTE (RE_Tag), | |
83c6c069 | 6148 | New_Occurrence_Of |
acf97c11 | 6149 | (Node |
6150 | (Next_Elmt (Sec_DT_Ancestor)), | |
6151 | Loc)), | |
343d35dc | 6152 | New_Tag_Node => |
6153 | Unchecked_Convert_To (RTE (RE_Tag), | |
83c6c069 | 6154 | New_Occurrence_Of |
acf97c11 | 6155 | (Node (Next_Elmt (Sec_DT_Typ)), |
6156 | Loc)))); | |
343d35dc | 6157 | |
6158 | if Num_Prims /= 0 then | |
6159 | Append_To (Elab_Code, | |
6160 | Build_Inherit_Prims (Loc, | |
17e14451 | 6161 | Typ => Node (Iface), |
343d35dc | 6162 | Old_Tag_Node => |
6163 | Unchecked_Convert_To | |
6164 | (RTE (RE_Tag), | |
83c6c069 | 6165 | New_Occurrence_Of |
343d35dc | 6166 | (Node (Sec_DT_Ancestor), |
6167 | Loc)), | |
6168 | New_Tag_Node => | |
6169 | Unchecked_Convert_To | |
6170 | (RTE (RE_Tag), | |
83c6c069 | 6171 | New_Occurrence_Of |
343d35dc | 6172 | (Node (Sec_DT_Typ), Loc)), |
17e14451 | 6173 | Num_Prims => Num_Prims)); |
343d35dc | 6174 | end if; |
cdb1c38f | 6175 | end if; |
6176 | end; | |
af647dc7 | 6177 | |
6178 | Next_Elmt (Sec_DT_Ancestor); | |
6179 | Next_Elmt (Sec_DT_Typ); | |
acf97c11 | 6180 | |
6181 | -- Skip the secondary dispatch table of | |
6182 | -- predefined primitives | |
6183 | ||
6184 | Next_Elmt (Sec_DT_Ancestor); | |
6185 | Next_Elmt (Sec_DT_Typ); | |
6186 | ||
af647dc7 | 6187 | Next_Elmt (Iface); |
6188 | end if; | |
d62940bf | 6189 | |
af647dc7 | 6190 | Next_Entity (E); |
6191 | end loop; | |
6192 | end if; | |
6193 | end Copy_Secondary_DTs; | |
d62940bf | 6194 | |
af647dc7 | 6195 | begin |
725a69d2 | 6196 | if Present (Node (Sec_DT_Ancestor)) |
6197 | and then Ekind (Node (Sec_DT_Ancestor)) = E_Constant | |
6198 | then | |
af647dc7 | 6199 | -- Handle private types |
76a1c25b | 6200 | |
af647dc7 | 6201 | if Present (Full_View (Typ)) then |
6202 | Copy_Secondary_DTs (Full_View (Typ)); | |
6203 | else | |
6204 | Copy_Secondary_DTs (Typ); | |
6205 | end if; | |
76a1c25b | 6206 | end if; |
af647dc7 | 6207 | end; |
6208 | end if; | |
76a1c25b | 6209 | end if; |
343d35dc | 6210 | end if; |
d62940bf | 6211 | |
15a67a0a | 6212 | -- Generate code to check if the external tag of this type is the same |
6213 | -- as the external tag of some other declaration. | |
354540f3 | 6214 | |
6215 | -- Check_TSD (TSD'Unrestricted_Access); | |
6216 | ||
4a473cb9 | 6217 | -- This check is a consequence of AI05-0113-1/06, so it officially |
6218 | -- applies to Ada 2005 (and Ada 2012). It might be argued that it is | |
6219 | -- a desirable check to add in Ada 95 mode, but we hesitate to make | |
6220 | -- this change, as it would be incompatible, and could conceivably | |
6221 | -- cause a problem in existing Aa 95 code. | |
6222 | ||
6223 | -- We check for No_Run_Time_Mode here, because we do not want to pick | |
6224 | -- up the RE_Check_TSD entity and call it in No_Run_Time mode. | |
52b9debb | 6225 | |
354540f3 | 6226 | if not No_Run_Time_Mode |
4a473cb9 | 6227 | and then Ada_Version >= Ada_2005 |
354540f3 | 6228 | and then RTE_Available (RE_Check_TSD) |
008ad845 | 6229 | and then not Debug_Flag_QQ |
354540f3 | 6230 | then |
6231 | Append_To (Elab_Code, | |
6232 | Make_Procedure_Call_Statement (Loc, | |
15a67a0a | 6233 | Name => |
6234 | New_Occurrence_Of (RTE (RE_Check_TSD), Loc), | |
354540f3 | 6235 | Parameter_Associations => New_List ( |
6236 | Make_Attribute_Reference (Loc, | |
15a67a0a | 6237 | Prefix => New_Occurrence_Of (TSD, Loc), |
354540f3 | 6238 | Attribute_Name => Name_Unchecked_Access)))); |
6239 | end if; | |
6240 | ||
343d35dc | 6241 | -- Generate code to register the Tag in the External_Tag hash table for |
6242 | -- the pure Ada type only. | |
d62940bf | 6243 | |
343d35dc | 6244 | -- Register_Tag (Dt_Ptr); |
d62940bf | 6245 | |
725a69d2 | 6246 | -- Skip this action in the following cases: |
6247 | -- 1) if Register_Tag is not available. | |
6248 | -- 2) in No_Run_Time mode. | |
2ea346ac | 6249 | -- 3) if Typ is not defined at the library level (this is required |
725a69d2 | 6250 | -- to avoid adding concurrency control to the hash table used |
6251 | -- by the run-time to register the tags). | |
d62940bf | 6252 | |
cdb1c38f | 6253 | if not No_Run_Time_Mode |
6254 | and then Is_Library_Level_Entity (Typ) | |
6255 | and then RTE_Available (RE_Register_Tag) | |
6256 | then | |
725a69d2 | 6257 | Append_To (Elab_Code, |
cdb1c38f | 6258 | Make_Procedure_Call_Statement (Loc, |
83c6c069 | 6259 | Name => New_Occurrence_Of (RTE (RE_Register_Tag), Loc), |
cdb1c38f | 6260 | Parameter_Associations => |
83c6c069 | 6261 | New_List (New_Occurrence_Of (DT_Ptr, Loc)))); |
d62940bf | 6262 | end if; |
6263 | ||
2ea346ac | 6264 | if not Is_Empty_List (Elab_Code) then |
6265 | Append_List_To (Result, Elab_Code); | |
6266 | end if; | |
cdb1c38f | 6267 | |
f38c8084 | 6268 | -- Populate the two auxiliary tables used for dispatching asynchronous, |
6269 | -- conditional and timed selects for synchronized types that implement | |
6270 | -- a limited interface. Skip this step in Ravenscar profile or when | |
6271 | -- general dispatching is forbidden. | |
17e14451 | 6272 | |
de54c5ab | 6273 | if Ada_Version >= Ada_2005 |
17e14451 | 6274 | and then Is_Concurrent_Record_Type (Typ) |
a652dd51 | 6275 | and then Has_Interfaces (Typ) |
f38c8084 | 6276 | and then not Restriction_Active (No_Dispatching_Calls) |
6277 | and then not Restriction_Active (No_Select_Statements) | |
17e14451 | 6278 | then |
6279 | Append_List_To (Result, | |
6280 | Make_Select_Specific_Data_Table (Typ)); | |
6281 | end if; | |
6282 | ||
cc60bd16 | 6283 | -- Remember entities containing dispatch tables |
acf97c11 | 6284 | |
cc60bd16 | 6285 | Append_Elmt (Predef_Prims, DT_Decl); |
6286 | Append_Elmt (DT, DT_Decl); | |
acf97c11 | 6287 | |
725a69d2 | 6288 | Analyze_List (Result, Suppress => All_Checks); |
17e14451 | 6289 | Set_Has_Dispatch_Table (Typ); |
6290 | ||
f301a57b | 6291 | -- Mark entities containing dispatch tables. Required by the backend to |
6292 | -- handle them properly. | |
cc60bd16 | 6293 | |
925c2ba1 | 6294 | if Has_DT (Typ) then |
cc60bd16 | 6295 | declare |
6296 | Elmt : Elmt_Id; | |
6297 | ||
6298 | begin | |
cc60bd16 | 6299 | -- Object declarations |
6300 | ||
6301 | Elmt := First_Elmt (DT_Decl); | |
6302 | while Present (Elmt) loop | |
6303 | Set_Is_Dispatch_Table_Entity (Node (Elmt)); | |
6304 | pragma Assert (Ekind (Etype (Node (Elmt))) = E_Array_Subtype | |
6305 | or else Ekind (Etype (Node (Elmt))) = E_Record_Subtype); | |
6306 | Set_Is_Dispatch_Table_Entity (Etype (Node (Elmt))); | |
6307 | Next_Elmt (Elmt); | |
6308 | end loop; | |
6309 | ||
6310 | -- Aggregates initializing dispatch tables | |
6311 | ||
6312 | Elmt := First_Elmt (DT_Aggr); | |
6313 | while Present (Elmt) loop | |
6314 | Set_Is_Dispatch_Table_Entity (Etype (Node (Elmt))); | |
6315 | Next_Elmt (Elmt); | |
6316 | end loop; | |
6317 | end; | |
6318 | end if; | |
6319 | ||
e00e091c | 6320 | -- Register the tagged type in the call graph nodes table |
6321 | ||
6322 | Register_CG_Node (Typ); | |
6323 | ||
76a1c25b | 6324 | return Result; |
6325 | end Make_DT; | |
d62940bf | 6326 | |
87d6f1a4 | 6327 | ----------------- |
6328 | -- Make_VM_TSD -- | |
6329 | ----------------- | |
6330 | ||
6331 | function Make_VM_TSD (Typ : Entity_Id) return List_Id is | |
6cb4b973 | 6332 | Loc : constant Source_Ptr := Sloc (Typ); |
6333 | Result : constant List_Id := New_List; | |
6334 | ||
6335 | function Count_Primitives (Typ : Entity_Id) return Nat; | |
6336 | -- Count the non-predefined primitive operations of Typ | |
6337 | ||
6338 | ---------------------- | |
6339 | -- Count_Primitives -- | |
6340 | ---------------------- | |
6341 | ||
6342 | function Count_Primitives (Typ : Entity_Id) return Nat is | |
6343 | Nb_Prim : Nat; | |
6344 | Prim_Elmt : Elmt_Id; | |
6345 | Prim : Entity_Id; | |
6346 | ||
6347 | begin | |
6348 | Nb_Prim := 0; | |
6349 | ||
6350 | Prim_Elmt := First_Elmt (Primitive_Operations (Typ)); | |
6351 | while Present (Prim_Elmt) loop | |
6352 | Prim := Node (Prim_Elmt); | |
6353 | ||
6354 | if Is_Predefined_Dispatching_Operation (Prim) | |
6355 | or else Is_Predefined_Dispatching_Alias (Prim) | |
6356 | then | |
6357 | null; | |
6358 | ||
6359 | elsif Present (Interface_Alias (Prim)) then | |
6360 | null; | |
6361 | ||
6362 | else | |
6363 | Nb_Prim := Nb_Prim + 1; | |
6364 | end if; | |
6365 | ||
6366 | Next_Elmt (Prim_Elmt); | |
6367 | end loop; | |
6368 | ||
6369 | return Nb_Prim; | |
6370 | end Count_Primitives; | |
6371 | ||
6372 | -------------- | |
6373 | -- Make_OSD -- | |
6374 | -------------- | |
6375 | ||
6376 | function Make_OSD (Iface : Entity_Id) return Node_Id; | |
6377 | -- Generate the Object Specific Data table required to dispatch calls | |
6378 | -- through synchronized interfaces. Returns a node that references the | |
6379 | -- generated OSD object. | |
6380 | ||
6381 | function Make_OSD (Iface : Entity_Id) return Node_Id is | |
6382 | Nb_Prim : constant Nat := Count_Primitives (Iface); | |
6383 | OSD : Entity_Id; | |
6384 | OSD_Aggr_List : List_Id; | |
6385 | ||
6386 | begin | |
6387 | -- Generate | |
6388 | -- OSD : Ada.Tags.Object_Specific_Data (Nb_Prims) := | |
6389 | -- (OSD_Table => (1 => <value>, | |
6390 | -- ... | |
6391 | -- N => <value>)); | |
6392 | ||
6393 | if Nb_Prim = 0 | |
6394 | or else Is_Abstract_Type (Typ) | |
6395 | or else Is_Controlled (Typ) | |
6396 | or else Restriction_Active (No_Dispatching_Calls) | |
6397 | or else not Is_Limited_Type (Typ) | |
6398 | or else not Has_Interfaces (Typ) | |
6399 | or else not RTE_Record_Component_Available (RE_OSD_Table) | |
6400 | then | |
6401 | -- No OSD table required | |
6402 | ||
6403 | return Make_Null (Loc); | |
6404 | ||
6405 | else | |
6406 | OSD_Aggr_List := New_List; | |
6407 | ||
6408 | declare | |
6409 | Prim_Table : array (Nat range 1 .. Nb_Prim) of Entity_Id; | |
6410 | Prim : Entity_Id; | |
6411 | Prim_Alias : Entity_Id; | |
6412 | Prim_Elmt : Elmt_Id; | |
6413 | E : Entity_Id; | |
6414 | Count : Nat := 0; | |
6415 | Pos : Nat; | |
6416 | ||
6417 | begin | |
6418 | Prim_Table := (others => Empty); | |
6419 | Prim_Alias := Empty; | |
6420 | ||
6421 | Prim_Elmt := First_Elmt (Primitive_Operations (Typ)); | |
6422 | while Present (Prim_Elmt) loop | |
6423 | Prim := Node (Prim_Elmt); | |
6424 | ||
6425 | if Present (Interface_Alias (Prim)) | |
6426 | and then Find_Dispatching_Type | |
6427 | (Interface_Alias (Prim)) = Iface | |
6428 | then | |
6429 | Prim_Alias := Interface_Alias (Prim); | |
6430 | E := Ultimate_Alias (Prim); | |
6431 | Pos := UI_To_Int (DT_Position (Prim_Alias)); | |
6432 | ||
6433 | if Present (Prim_Table (Pos)) then | |
6434 | pragma Assert (Prim_Table (Pos) = E); | |
6435 | null; | |
6436 | ||
6437 | else | |
6438 | Prim_Table (Pos) := E; | |
6439 | ||
6440 | Append_To (OSD_Aggr_List, | |
6441 | Make_Component_Association (Loc, | |
6442 | Choices => New_List ( | |
6443 | Make_Integer_Literal (Loc, | |
6444 | DT_Position (Prim_Alias))), | |
6445 | Expression => | |
6446 | Make_Integer_Literal (Loc, | |
6447 | DT_Position (Alias (Prim))))); | |
6448 | ||
6449 | Count := Count + 1; | |
6450 | end if; | |
6451 | end if; | |
6452 | ||
6453 | Next_Elmt (Prim_Elmt); | |
6454 | end loop; | |
6455 | pragma Assert (Count = Nb_Prim); | |
6456 | end; | |
6457 | ||
6458 | OSD := Make_Temporary (Loc, 'I'); | |
6459 | ||
6460 | Append_To (Result, | |
6461 | Make_Object_Declaration (Loc, | |
6462 | Defining_Identifier => OSD, | |
6463 | Aliased_Present => True, | |
6464 | Constant_Present => True, | |
6465 | Object_Definition => | |
6466 | Make_Subtype_Indication (Loc, | |
6467 | Subtype_Mark => | |
83c6c069 | 6468 | New_Occurrence_Of (RTE (RE_Object_Specific_Data), Loc), |
6cb4b973 | 6469 | Constraint => |
6470 | Make_Index_Or_Discriminant_Constraint (Loc, | |
6471 | Constraints => New_List ( | |
6472 | Make_Integer_Literal (Loc, Nb_Prim)))), | |
6473 | ||
6474 | Expression => | |
6475 | Make_Aggregate (Loc, | |
6476 | Component_Associations => New_List ( | |
6477 | Make_Component_Association (Loc, | |
6478 | Choices => New_List ( | |
6479 | New_Occurrence_Of | |
6480 | (RTE_Record_Component (RE_OSD_Num_Prims), Loc)), | |
6481 | Expression => | |
6482 | Make_Integer_Literal (Loc, Nb_Prim)), | |
6483 | ||
6484 | Make_Component_Association (Loc, | |
6485 | Choices => New_List ( | |
6486 | New_Occurrence_Of | |
6487 | (RTE_Record_Component (RE_OSD_Table), Loc)), | |
6488 | Expression => Make_Aggregate (Loc, | |
6489 | Component_Associations => OSD_Aggr_List)))))); | |
6490 | ||
6491 | return | |
6492 | Make_Attribute_Reference (Loc, | |
83c6c069 | 6493 | Prefix => New_Occurrence_Of (OSD, Loc), |
6cb4b973 | 6494 | Attribute_Name => Name_Unchecked_Access); |
6495 | end if; | |
6496 | end Make_OSD; | |
6497 | ||
6498 | -- Local variables | |
6499 | ||
6500 | Nb_Prim : constant Nat := Count_Primitives (Typ); | |
87d6f1a4 | 6501 | AI : Elmt_Id; |
bf7f5966 | 6502 | I_Depth : Nat; |
87d6f1a4 | 6503 | Iface_Table_Node : Node_Id; |
bf7f5966 | 6504 | Num_Ifaces : Nat; |
87d6f1a4 | 6505 | TSD_Aggr_List : List_Id; |
6506 | Typ_Ifaces : Elist_Id; | |
6507 | TSD_Tags_List : List_Id; | |
6508 | ||
6509 | Tname : constant Name_Id := Chars (Typ); | |
bf7f5966 | 6510 | Name_SSD : constant Name_Id := |
6511 | New_External_Name (Tname, 'S', Suffix_Index => -1); | |
87d6f1a4 | 6512 | Name_TSD : constant Name_Id := |
6513 | New_External_Name (Tname, 'B', Suffix_Index => -1); | |
bf7f5966 | 6514 | SSD : constant Entity_Id := |
6515 | Make_Defining_Identifier (Loc, Name_SSD); | |
87d6f1a4 | 6516 | TSD : constant Entity_Id := |
6517 | Make_Defining_Identifier (Loc, Name_TSD); | |
6518 | begin | |
6519 | -- Generate code to create the storage for the type specific data object | |
6520 | -- with enough space to store the tags of the ancestors plus the tags | |
6521 | -- of all the implemented interfaces (as described in a-tags.ads). | |
6522 | ||
6523 | -- TSD : Type_Specific_Data (I_Depth) := | |
6524 | -- (Idepth => I_Depth, | |
6cb4b973 | 6525 | -- Tag_Kind => <tag_kind-value>, |
87d6f1a4 | 6526 | -- Access_Level => Type_Access_Level (Typ), |
d67a83fe | 6527 | -- Alignment => Typ'Alignment, |
87d6f1a4 | 6528 | -- HT_Link => null, |
6529 | -- Type_Is_Abstract => <<boolean-value>>, | |
6530 | -- Type_Is_Library_Level => <<boolean-value>>, | |
6531 | -- Interfaces_Table => <<access-value>> | |
6cb4b973 | 6532 | -- SSD => SSD_Table'Address |
87d6f1a4 | 6533 | -- Tags_Table => (0 => Typ'Tag, |
6534 | -- 1 => Parent'Tag | |
6535 | -- ...)); | |
6536 | ||
6537 | TSD_Aggr_List := New_List; | |
6538 | ||
6539 | -- Idepth: Count ancestors to compute the inheritance depth. For private | |
6540 | -- extensions, always go to the full view in order to compute the real | |
6541 | -- inheritance depth. | |
6542 | ||
6543 | declare | |
6544 | Current_Typ : Entity_Id; | |
6545 | Parent_Typ : Entity_Id; | |
6546 | ||
6547 | begin | |
6548 | I_Depth := 0; | |
6549 | Current_Typ := Typ; | |
6550 | loop | |
6551 | Parent_Typ := Etype (Current_Typ); | |
6552 | ||
6553 | if Is_Private_Type (Parent_Typ) then | |
6554 | Parent_Typ := Full_View (Base_Type (Parent_Typ)); | |
6555 | end if; | |
6556 | ||
6557 | exit when Parent_Typ = Current_Typ; | |
6558 | ||
6559 | I_Depth := I_Depth + 1; | |
6560 | Current_Typ := Parent_Typ; | |
6561 | end loop; | |
6562 | end; | |
6563 | ||
6cb4b973 | 6564 | -- I_Depth |
6565 | ||
87d6f1a4 | 6566 | Append_To (TSD_Aggr_List, |
6567 | Make_Integer_Literal (Loc, I_Depth)); | |
6568 | ||
6cb4b973 | 6569 | -- Tag_Kind |
6570 | ||
6571 | Append_To (TSD_Aggr_List, Tagged_Kind (Typ)); | |
6572 | ||
87d6f1a4 | 6573 | -- Access_Level |
6574 | ||
6575 | Append_To (TSD_Aggr_List, | |
6576 | Make_Integer_Literal (Loc, Type_Access_Level (Typ))); | |
6577 | ||
d67a83fe | 6578 | -- Alignment |
6579 | ||
6fc3e7ad | 6580 | -- For CPP types we cannot rely on the value of 'Alignment provided |
44705307 | 6581 | -- by the backend to initialize this TSD field. Why not??? |
6fc3e7ad | 6582 | |
6583 | if Convention (Typ) = Convention_CPP | |
6584 | or else Is_CPP_Class (Root_Type (Typ)) | |
6585 | then | |
6586 | Append_To (TSD_Aggr_List, | |
6587 | Make_Integer_Literal (Loc, 0)); | |
6588 | else | |
6589 | Append_To (TSD_Aggr_List, | |
6590 | Make_Attribute_Reference (Loc, | |
83c6c069 | 6591 | Prefix => New_Occurrence_Of (Typ, Loc), |
6fc3e7ad | 6592 | Attribute_Name => Name_Alignment)); |
6593 | end if; | |
d67a83fe | 6594 | |
87d6f1a4 | 6595 | -- HT_Link |
6596 | ||
6597 | Append_To (TSD_Aggr_List, | |
6598 | Make_Null (Loc)); | |
6599 | ||
6600 | -- Type_Is_Abstract (Ada 2012: AI05-0173) | |
6601 | ||
6602 | declare | |
6603 | Type_Is_Abstract : Entity_Id; | |
6604 | ||
6605 | begin | |
6606 | Type_Is_Abstract := | |
6607 | Boolean_Literals (Is_Abstract_Type (Typ)); | |
6608 | ||
6609 | Append_To (TSD_Aggr_List, | |
6610 | New_Occurrence_Of (Type_Is_Abstract, Loc)); | |
6611 | end; | |
6612 | ||
6613 | -- Type_Is_Library_Level | |
6614 | ||
6615 | declare | |
6616 | Type_Is_Library_Level : Entity_Id; | |
87d6f1a4 | 6617 | begin |
6618 | Type_Is_Library_Level := | |
6619 | Boolean_Literals (Is_Library_Level_Entity (Typ)); | |
87d6f1a4 | 6620 | Append_To (TSD_Aggr_List, |
6621 | New_Occurrence_Of (Type_Is_Library_Level, Loc)); | |
6622 | end; | |
6623 | ||
6624 | -- Interfaces_Table (required for AI-405) | |
6625 | ||
6626 | if RTE_Record_Component_Available (RE_Interfaces_Table) then | |
6627 | ||
6628 | -- Count the number of interface types implemented by Typ | |
6629 | ||
6630 | Collect_Interfaces (Typ, Typ_Ifaces); | |
6631 | ||
bf7f5966 | 6632 | Num_Ifaces := 0; |
87d6f1a4 | 6633 | AI := First_Elmt (Typ_Ifaces); |
6634 | while Present (AI) loop | |
6635 | Num_Ifaces := Num_Ifaces + 1; | |
6636 | Next_Elmt (AI); | |
6637 | end loop; | |
6638 | ||
6639 | if Num_Ifaces = 0 then | |
6640 | Iface_Table_Node := Make_Null (Loc); | |
6641 | ||
6642 | -- Generate the Interface_Table object | |
6643 | ||
6644 | else | |
6645 | declare | |
6646 | TSD_Ifaces_List : constant List_Id := New_List; | |
6cb4b973 | 6647 | Iface : Entity_Id; |
87d6f1a4 | 6648 | ITable : Node_Id; |
6649 | ||
6650 | begin | |
6651 | AI := First_Elmt (Typ_Ifaces); | |
6652 | while Present (AI) loop | |
6cb4b973 | 6653 | Iface := Node (AI); |
6654 | ||
87d6f1a4 | 6655 | Append_To (TSD_Ifaces_List, |
6656 | Make_Aggregate (Loc, | |
6657 | Expressions => New_List ( | |
6cb4b973 | 6658 | |
4055a532 | 6659 | -- Iface_Tag |
6cb4b973 | 6660 | |
87d6f1a4 | 6661 | Make_Attribute_Reference (Loc, |
83c6c069 | 6662 | Prefix => New_Occurrence_Of (Iface, Loc), |
6cb4b973 | 6663 | Attribute_Name => Name_Tag), |
6664 | ||
4055a532 | 6665 | -- OSD |
6cb4b973 | 6666 | |
6667 | Make_OSD (Iface)))); | |
87d6f1a4 | 6668 | |
6669 | Next_Elmt (AI); | |
6670 | end loop; | |
6671 | ||
6672 | ITable := Make_Temporary (Loc, 'I'); | |
6673 | ||
6674 | Append_To (Result, | |
6675 | Make_Object_Declaration (Loc, | |
6676 | Defining_Identifier => ITable, | |
6677 | Aliased_Present => True, | |
6678 | Constant_Present => True, | |
6679 | Object_Definition => | |
6680 | Make_Subtype_Indication (Loc, | |
6681 | Subtype_Mark => | |
83c6c069 | 6682 | New_Occurrence_Of (RTE (RE_Interface_Data), Loc), |
b860aaec | 6683 | Constraint => Make_Index_Or_Discriminant_Constraint |
87d6f1a4 | 6684 | (Loc, |
6685 | Constraints => New_List ( | |
6686 | Make_Integer_Literal (Loc, Num_Ifaces)))), | |
6687 | ||
6688 | Expression => Make_Aggregate (Loc, | |
6689 | Expressions => New_List ( | |
6690 | Make_Integer_Literal (Loc, Num_Ifaces), | |
6691 | Make_Aggregate (Loc, | |
6692 | Expressions => TSD_Ifaces_List))))); | |
6693 | ||
6694 | Iface_Table_Node := | |
6695 | Make_Attribute_Reference (Loc, | |
83c6c069 | 6696 | Prefix => New_Occurrence_Of (ITable, Loc), |
87d6f1a4 | 6697 | Attribute_Name => Name_Unchecked_Access); |
6698 | end; | |
6699 | end if; | |
6700 | ||
6701 | Append_To (TSD_Aggr_List, Iface_Table_Node); | |
6702 | end if; | |
6703 | ||
bf7f5966 | 6704 | -- Generate the Select Specific Data table for synchronized types that |
6705 | -- implement synchronized interfaces. The size of the table is | |
6706 | -- constrained by the number of non-predefined primitive operations. | |
6707 | ||
bf7f5966 | 6708 | if RTE_Record_Component_Available (RE_SSD) then |
6709 | if Ada_Version >= Ada_2005 | |
6710 | and then Has_DT (Typ) | |
6711 | and then Is_Concurrent_Record_Type (Typ) | |
6712 | and then Has_Interfaces (Typ) | |
6713 | and then Nb_Prim > 0 | |
6714 | and then not Is_Abstract_Type (Typ) | |
6715 | and then not Is_Controlled (Typ) | |
6716 | and then not Restriction_Active (No_Dispatching_Calls) | |
6717 | and then not Restriction_Active (No_Select_Statements) | |
6718 | then | |
6719 | Append_To (Result, | |
6720 | Make_Object_Declaration (Loc, | |
6721 | Defining_Identifier => SSD, | |
6722 | Aliased_Present => True, | |
6723 | Object_Definition => | |
6724 | Make_Subtype_Indication (Loc, | |
83c6c069 | 6725 | Subtype_Mark => New_Occurrence_Of ( |
bf7f5966 | 6726 | RTE (RE_Select_Specific_Data), Loc), |
6727 | Constraint => | |
6728 | Make_Index_Or_Discriminant_Constraint (Loc, | |
6729 | Constraints => New_List ( | |
6730 | Make_Integer_Literal (Loc, Nb_Prim)))))); | |
6731 | ||
6732 | -- This table is initialized by Make_Select_Specific_Data_Table, | |
6733 | -- which calls Set_Entry_Index and Set_Prim_Op_Kind. | |
6734 | ||
6735 | Append_To (TSD_Aggr_List, | |
6736 | Make_Attribute_Reference (Loc, | |
83c6c069 | 6737 | Prefix => New_Occurrence_Of (SSD, Loc), |
bf7f5966 | 6738 | Attribute_Name => Name_Unchecked_Access)); |
6739 | else | |
6740 | Append_To (TSD_Aggr_List, Make_Null (Loc)); | |
6741 | end if; | |
6742 | end if; | |
6743 | ||
87d6f1a4 | 6744 | -- Initialize the table of ancestor tags. In case of interface types |
6745 | -- this table is not needed. | |
6746 | ||
6747 | TSD_Tags_List := New_List; | |
6748 | ||
6749 | -- Fill position 0 with Typ'Tag | |
6750 | ||
6751 | Append_To (TSD_Tags_List, | |
6752 | Make_Attribute_Reference (Loc, | |
83c6c069 | 6753 | Prefix => New_Occurrence_Of (Typ, Loc), |
87d6f1a4 | 6754 | Attribute_Name => Name_Tag)); |
6755 | ||
6756 | -- Fill the rest of the table with the tags of the ancestors | |
6757 | ||
6758 | declare | |
6759 | Current_Typ : Entity_Id; | |
6760 | Parent_Typ : Entity_Id; | |
6761 | Pos : Nat; | |
6762 | ||
6763 | begin | |
6764 | Pos := 1; | |
6765 | Current_Typ := Typ; | |
6766 | ||
6767 | loop | |
6768 | Parent_Typ := Etype (Current_Typ); | |
6769 | ||
6770 | if Is_Private_Type (Parent_Typ) then | |
6771 | Parent_Typ := Full_View (Base_Type (Parent_Typ)); | |
6772 | end if; | |
6773 | ||
6774 | exit when Parent_Typ = Current_Typ; | |
6775 | ||
6776 | Append_To (TSD_Tags_List, | |
6777 | Make_Attribute_Reference (Loc, | |
83c6c069 | 6778 | Prefix => New_Occurrence_Of (Parent_Typ, Loc), |
87d6f1a4 | 6779 | Attribute_Name => Name_Tag)); |
6780 | ||
6781 | Pos := Pos + 1; | |
6782 | Current_Typ := Parent_Typ; | |
6783 | end loop; | |
6784 | ||
6785 | pragma Assert (Pos = I_Depth + 1); | |
6786 | end; | |
6787 | ||
6788 | Append_To (TSD_Aggr_List, | |
6789 | Make_Aggregate (Loc, | |
6790 | Expressions => TSD_Tags_List)); | |
6791 | ||
6792 | -- Build the TSD object | |
6793 | ||
6794 | Append_To (Result, | |
6795 | Make_Object_Declaration (Loc, | |
6796 | Defining_Identifier => TSD, | |
6797 | Aliased_Present => True, | |
6798 | Constant_Present => True, | |
6799 | Object_Definition => | |
6800 | Make_Subtype_Indication (Loc, | |
83c6c069 | 6801 | Subtype_Mark => New_Occurrence_Of ( |
87d6f1a4 | 6802 | RTE (RE_Type_Specific_Data), Loc), |
6803 | Constraint => | |
6804 | Make_Index_Or_Discriminant_Constraint (Loc, | |
6805 | Constraints => New_List ( | |
6806 | Make_Integer_Literal (Loc, I_Depth)))), | |
6807 | ||
6808 | Expression => Make_Aggregate (Loc, | |
6809 | Expressions => TSD_Aggr_List))); | |
6810 | ||
6811 | -- Generate: | |
15a67a0a | 6812 | -- Check_TSD (TSD => TSD'Unrestricted_Access); |
87d6f1a4 | 6813 | |
79500ea0 | 6814 | if Ada_Version >= Ada_2005 |
6815 | and then Is_Library_Level_Entity (Typ) | |
79500ea0 | 6816 | and then RTE_Available (RE_Check_TSD) |
6817 | and then not Debug_Flag_QQ | |
6818 | then | |
6819 | Append_To (Result, | |
6820 | Make_Procedure_Call_Statement (Loc, | |
83c6c069 | 6821 | Name => New_Occurrence_Of (RTE (RE_Check_TSD), Loc), |
79500ea0 | 6822 | Parameter_Associations => New_List ( |
6823 | Make_Attribute_Reference (Loc, | |
83c6c069 | 6824 | Prefix => New_Occurrence_Of (TSD, Loc), |
79500ea0 | 6825 | Attribute_Name => Name_Unrestricted_Access)))); |
6826 | end if; | |
87d6f1a4 | 6827 | |
6828 | -- Generate: | |
6829 | -- Register_TSD (TSD'Unrestricted_Access); | |
6830 | ||
6831 | Append_To (Result, | |
6832 | Make_Procedure_Call_Statement (Loc, | |
83c6c069 | 6833 | Name => New_Occurrence_Of (RTE (RE_Register_TSD), Loc), |
87d6f1a4 | 6834 | Parameter_Associations => New_List ( |
6835 | Make_Attribute_Reference (Loc, | |
83c6c069 | 6836 | Prefix => New_Occurrence_Of (TSD, Loc), |
87d6f1a4 | 6837 | Attribute_Name => Name_Unrestricted_Access)))); |
6838 | ||
bf7f5966 | 6839 | -- Populate the two auxiliary tables used for dispatching asynchronous, |
6840 | -- conditional and timed selects for synchronized types that implement | |
6841 | -- a limited interface. Skip this step in Ravenscar profile or when | |
6842 | -- general dispatching is forbidden. | |
6843 | ||
6844 | if Ada_Version >= Ada_2005 | |
6845 | and then Is_Concurrent_Record_Type (Typ) | |
6846 | and then Has_Interfaces (Typ) | |
6847 | and then not Restriction_Active (No_Dispatching_Calls) | |
6848 | and then not Restriction_Active (No_Select_Statements) | |
6849 | then | |
6850 | Append_List_To (Result, | |
6851 | Make_Select_Specific_Data_Table (Typ)); | |
6852 | end if; | |
6853 | ||
87d6f1a4 | 6854 | return Result; |
6855 | end Make_VM_TSD; | |
6856 | ||
76a1c25b | 6857 | ------------------------------------- |
6858 | -- Make_Select_Specific_Data_Table -- | |
6859 | ------------------------------------- | |
d62940bf | 6860 | |
76a1c25b | 6861 | function Make_Select_Specific_Data_Table |
6862 | (Typ : Entity_Id) return List_Id | |
6863 | is | |
6864 | Assignments : constant List_Id := New_List; | |
6865 | Loc : constant Source_Ptr := Sloc (Typ); | |
d62940bf | 6866 | |
68f95949 | 6867 | Conc_Typ : Entity_Id; |
6868 | Decls : List_Id; | |
68f95949 | 6869 | Prim : Entity_Id; |
6870 | Prim_Als : Entity_Id; | |
6871 | Prim_Elmt : Elmt_Id; | |
6872 | Prim_Pos : Uint; | |
343d35dc | 6873 | Nb_Prim : Nat := 0; |
d62940bf | 6874 | |
76a1c25b | 6875 | type Examined_Array is array (Int range <>) of Boolean; |
d62940bf | 6876 | |
76a1c25b | 6877 | function Find_Entry_Index (E : Entity_Id) return Uint; |
6878 | -- Given an entry, find its index in the visible declarations of the | |
6879 | -- corresponding concurrent type of Typ. | |
d62940bf | 6880 | |
76a1c25b | 6881 | ---------------------- |
6882 | -- Find_Entry_Index -- | |
6883 | ---------------------- | |
d62940bf | 6884 | |
76a1c25b | 6885 | function Find_Entry_Index (E : Entity_Id) return Uint is |
6886 | Index : Uint := Uint_1; | |
6887 | Subp_Decl : Entity_Id; | |
d62940bf | 6888 | |
76a1c25b | 6889 | begin |
6890 | if Present (Decls) | |
6891 | and then not Is_Empty_List (Decls) | |
6892 | then | |
6893 | Subp_Decl := First (Decls); | |
6894 | while Present (Subp_Decl) loop | |
6895 | if Nkind (Subp_Decl) = N_Entry_Declaration then | |
6896 | if Defining_Identifier (Subp_Decl) = E then | |
6897 | return Index; | |
6898 | end if; | |
d62940bf | 6899 | |
76a1c25b | 6900 | Index := Index + 1; |
6901 | end if; | |
d62940bf | 6902 | |
76a1c25b | 6903 | Next (Subp_Decl); |
6904 | end loop; | |
6905 | end if; | |
d62940bf | 6906 | |
76a1c25b | 6907 | return Uint_0; |
6908 | end Find_Entry_Index; | |
6909 | ||
bf7f5966 | 6910 | -- Local variables |
6911 | ||
6912 | Tag_Node : Node_Id; | |
6913 | ||
76a1c25b | 6914 | -- Start of processing for Make_Select_Specific_Data_Table |
6915 | ||
6916 | begin | |
68f95949 | 6917 | pragma Assert (not Restriction_Active (No_Dispatching_Calls)); |
6918 | ||
76a1c25b | 6919 | if Present (Corresponding_Concurrent_Type (Typ)) then |
6920 | Conc_Typ := Corresponding_Concurrent_Type (Typ); | |
6921 | ||
17e14451 | 6922 | if Present (Full_View (Conc_Typ)) then |
6923 | Conc_Typ := Full_View (Conc_Typ); | |
6924 | end if; | |
6925 | ||
76a1c25b | 6926 | if Ekind (Conc_Typ) = E_Protected_Type then |
6927 | Decls := Visible_Declarations (Protected_Definition ( | |
6928 | Parent (Conc_Typ))); | |
d62940bf | 6929 | else |
6930 | pragma Assert (Ekind (Conc_Typ) = E_Task_Type); | |
76a1c25b | 6931 | Decls := Visible_Declarations (Task_Definition ( |
6932 | Parent (Conc_Typ))); | |
6933 | end if; | |
6934 | end if; | |
d62940bf | 6935 | |
76a1c25b | 6936 | -- Count the non-predefined primitive operations |
d62940bf | 6937 | |
76a1c25b | 6938 | Prim_Elmt := First_Elmt (Primitive_Operations (Typ)); |
6939 | while Present (Prim_Elmt) loop | |
af647dc7 | 6940 | Prim := Node (Prim_Elmt); |
6941 | ||
6942 | if not (Is_Predefined_Dispatching_Operation (Prim) | |
6943 | or else Is_Predefined_Dispatching_Alias (Prim)) | |
6944 | then | |
76a1c25b | 6945 | Nb_Prim := Nb_Prim + 1; |
6946 | end if; | |
d62940bf | 6947 | |
76a1c25b | 6948 | Next_Elmt (Prim_Elmt); |
6949 | end loop; | |
d62940bf | 6950 | |
76a1c25b | 6951 | declare |
68f95949 | 6952 | Examined : Examined_Array (1 .. Nb_Prim) := (others => False); |
d62940bf | 6953 | |
76a1c25b | 6954 | begin |
6955 | Prim_Elmt := First_Elmt (Primitive_Operations (Typ)); | |
6956 | while Present (Prim_Elmt) loop | |
6957 | Prim := Node (Prim_Elmt); | |
d62940bf | 6958 | |
af647dc7 | 6959 | -- Look for primitive overriding an abstract interface subprogram |
d62940bf | 6960 | |
a652dd51 | 6961 | if Present (Interface_Alias (Prim)) |
c8da6114 | 6962 | and then not |
6963 | Is_Ancestor | |
cb4af01d | 6964 | (Find_Dispatching_Type (Interface_Alias (Prim)), Typ, |
6965 | Use_Full_View => True) | |
af647dc7 | 6966 | and then not Examined (UI_To_Int (DT_Position (Alias (Prim)))) |
6967 | then | |
6968 | Prim_Pos := DT_Position (Alias (Prim)); | |
6969 | pragma Assert (UI_To_Int (Prim_Pos) <= Nb_Prim); | |
6970 | Examined (UI_To_Int (Prim_Pos)) := True; | |
d62940bf | 6971 | |
af647dc7 | 6972 | -- Set the primitive operation kind regardless of subprogram |
6973 | -- type. Generate: | |
6974 | -- Ada.Tags.Set_Prim_Op_Kind (DT_Ptr, <position>, <kind>); | |
d62940bf | 6975 | |
bf7f5966 | 6976 | if Tagged_Type_Expansion then |
6977 | Tag_Node := | |
83c6c069 | 6978 | New_Occurrence_Of |
bf7f5966 | 6979 | (Node (First_Elmt (Access_Disp_Table (Typ))), Loc); |
6980 | ||
6981 | else | |
6982 | Tag_Node := | |
6983 | Make_Attribute_Reference (Loc, | |
83c6c069 | 6984 | Prefix => New_Occurrence_Of (Typ, Loc), |
bf7f5966 | 6985 | Attribute_Name => Name_Tag); |
6986 | end if; | |
6987 | ||
af647dc7 | 6988 | Append_To (Assignments, |
725a69d2 | 6989 | Make_Procedure_Call_Statement (Loc, |
83c6c069 | 6990 | Name => New_Occurrence_Of (RTE (RE_Set_Prim_Op_Kind), Loc), |
725a69d2 | 6991 | Parameter_Associations => New_List ( |
bf7f5966 | 6992 | Tag_Node, |
725a69d2 | 6993 | Make_Integer_Literal (Loc, Prim_Pos), |
6994 | Prim_Op_Kind (Alias (Prim), Typ)))); | |
68f95949 | 6995 | |
af647dc7 | 6996 | -- Retrieve the root of the alias chain |
68f95949 | 6997 | |
fc2907f6 | 6998 | Prim_Als := Ultimate_Alias (Prim); |
68f95949 | 6999 | |
af647dc7 | 7000 | -- In the case of an entry wrapper, set the entry index |
68f95949 | 7001 | |
af647dc7 | 7002 | if Ekind (Prim) = E_Procedure |
7003 | and then Is_Primitive_Wrapper (Prim_Als) | |
7004 | and then Ekind (Wrapped_Entity (Prim_Als)) = E_Entry | |
7005 | then | |
7006 | -- Generate: | |
7007 | -- Ada.Tags.Set_Entry_Index | |
7008 | -- (DT_Ptr, <position>, <index>); | |
68f95949 | 7009 | |
bf7f5966 | 7010 | if Tagged_Type_Expansion then |
7011 | Tag_Node := | |
83c6c069 | 7012 | New_Occurrence_Of |
96dc081d | 7013 | (Node (First_Elmt (Access_Disp_Table (Typ))), Loc); |
bf7f5966 | 7014 | else |
7015 | Tag_Node := | |
7016 | Make_Attribute_Reference (Loc, | |
83c6c069 | 7017 | Prefix => New_Occurrence_Of (Typ, Loc), |
bf7f5966 | 7018 | Attribute_Name => Name_Tag); |
7019 | end if; | |
7020 | ||
af647dc7 | 7021 | Append_To (Assignments, |
725a69d2 | 7022 | Make_Procedure_Call_Statement (Loc, |
7023 | Name => | |
83c6c069 | 7024 | New_Occurrence_Of (RTE (RE_Set_Entry_Index), Loc), |
725a69d2 | 7025 | Parameter_Associations => New_List ( |
bf7f5966 | 7026 | Tag_Node, |
725a69d2 | 7027 | Make_Integer_Literal (Loc, Prim_Pos), |
7028 | Make_Integer_Literal (Loc, | |
7029 | Find_Entry_Index (Wrapped_Entity (Prim_Als)))))); | |
76a1c25b | 7030 | end if; |
7031 | end if; | |
7032 | ||
76a1c25b | 7033 | Next_Elmt (Prim_Elmt); |
7034 | end loop; | |
7035 | end; | |
7036 | ||
7037 | return Assignments; | |
7038 | end Make_Select_Specific_Data_Table; | |
d62940bf | 7039 | |
17e14451 | 7040 | --------------- |
7041 | -- Make_Tags -- | |
7042 | --------------- | |
7043 | ||
7044 | function Make_Tags (Typ : Entity_Id) return List_Id is | |
f301a57b | 7045 | Loc : constant Source_Ptr := Sloc (Typ); |
7046 | Result : constant List_Id := New_List; | |
7047 | ||
7048 | procedure Import_DT | |
7049 | (Tag_Typ : Entity_Id; | |
7050 | DT : Entity_Id; | |
7051 | Is_Secondary_DT : Boolean); | |
7052 | -- Import the dispatch table DT of tagged type Tag_Typ. Required to | |
7053 | -- generate forward references and statically allocate the table. For | |
7054 | -- primary dispatch tables that require no dispatch table generate: | |
d03ada96 | 7055 | |
f301a57b | 7056 | -- DT : static aliased constant Non_Dispatch_Table_Wrapper; |
d03ada96 | 7057 | -- pragma Import (Ada, DT); |
7058 | ||
f301a57b | 7059 | -- Otherwise generate: |
d03ada96 | 7060 | |
f301a57b | 7061 | -- DT : static aliased constant Dispatch_Table_Wrapper (Nb_Prim); |
d03ada96 | 7062 | -- pragma Import (Ada, DT); |
7854e190 | 7063 | |
f301a57b | 7064 | --------------- |
7065 | -- Import_DT -- | |
7066 | --------------- | |
24971415 | 7067 | |
f301a57b | 7068 | procedure Import_DT |
7069 | (Tag_Typ : Entity_Id; | |
7070 | DT : Entity_Id; | |
7071 | Is_Secondary_DT : Boolean) | |
7072 | is | |
7073 | DT_Constr_List : List_Id; | |
7074 | Nb_Prim : Nat; | |
24971415 | 7075 | |
f301a57b | 7076 | begin |
7077 | Set_Is_Imported (DT); | |
7078 | Set_Ekind (DT, E_Constant); | |
7079 | Set_Related_Type (DT, Typ); | |
24971415 | 7080 | |
24971415 | 7081 | -- The scope must be set now to call Get_External_Name |
7082 | ||
7083 | Set_Scope (DT, Current_Scope); | |
7084 | ||
f92da234 | 7085 | Get_External_Name (DT); |
24971415 | 7086 | Set_Interface_Name (DT, |
d03ada96 | 7087 | Make_String_Literal (Loc, Strval => String_From_Name_Buffer)); |
17e14451 | 7088 | |
24971415 | 7089 | -- Ensure proper Sprint output of this implicit importation |
17e14451 | 7090 | |
24971415 | 7091 | Set_Is_Internal (DT); |
17e14451 | 7092 | |
24971415 | 7093 | -- Save this entity to allow Make_DT to generate its exportation |
7094 | ||
f301a57b | 7095 | Append_Elmt (DT, Dispatch_Table_Wrappers (Typ)); |
24971415 | 7096 | |
f301a57b | 7097 | -- No dispatch table required |
acf97c11 | 7098 | |
d03ada96 | 7099 | if not Is_Secondary_DT and then not Has_DT (Tag_Typ) then |
f301a57b | 7100 | Append_To (Result, |
7101 | Make_Object_Declaration (Loc, | |
7102 | Defining_Identifier => DT, | |
7103 | Aliased_Present => True, | |
7104 | Constant_Present => True, | |
7105 | Object_Definition => | |
83c6c069 | 7106 | New_Occurrence_Of |
7107 | (RTE (RE_No_Dispatch_Table_Wrapper), Loc))); | |
f301a57b | 7108 | |
7109 | else | |
24971415 | 7110 | -- Calculate the number of primitives of the dispatch table and |
7111 | -- the size of the Type_Specific_Data record. | |
7112 | ||
f301a57b | 7113 | Nb_Prim := |
7114 | UI_To_Int (DT_Entry_Count (First_Tag_Component (Tag_Typ))); | |
24971415 | 7115 | |
d03ada96 | 7116 | -- If the tagged type has no primitives we add a dummy slot whose |
7117 | -- address will be the tag of this type. | |
24971415 | 7118 | |
7119 | if Nb_Prim = 0 then | |
7120 | DT_Constr_List := | |
7121 | New_List (Make_Integer_Literal (Loc, 1)); | |
7122 | else | |
7123 | DT_Constr_List := | |
7124 | New_List (Make_Integer_Literal (Loc, Nb_Prim)); | |
7125 | end if; | |
7126 | ||
7127 | Append_To (Result, | |
7128 | Make_Object_Declaration (Loc, | |
7129 | Defining_Identifier => DT, | |
7130 | Aliased_Present => True, | |
7131 | Constant_Present => True, | |
7132 | Object_Definition => | |
7133 | Make_Subtype_Indication (Loc, | |
7134 | Subtype_Mark => | |
83c6c069 | 7135 | New_Occurrence_Of (RTE (RE_Dispatch_Table_Wrapper), Loc), |
24971415 | 7136 | Constraint => Make_Index_Or_Discriminant_Constraint (Loc, |
7137 | Constraints => DT_Constr_List)))); | |
f301a57b | 7138 | end if; |
7139 | end Import_DT; | |
7140 | ||
7141 | -- Local variables | |
7142 | ||
7143 | Tname : constant Name_Id := Chars (Typ); | |
7144 | AI_Tag_Comp : Elmt_Id; | |
7640ed3d | 7145 | DT : Node_Id := Empty; |
f301a57b | 7146 | DT_Ptr : Node_Id; |
7147 | Predef_Prims_Ptr : Node_Id; | |
d04be62f | 7148 | Iface_DT : Node_Id := Empty; |
f301a57b | 7149 | Iface_DT_Ptr : Node_Id; |
d215f619 | 7150 | New_Node : Node_Id; |
f301a57b | 7151 | Suffix_Index : Int; |
7152 | Typ_Name : Name_Id; | |
7153 | Typ_Comps : Elist_Id; | |
7154 | ||
7155 | -- Start of processing for Make_Tags | |
7156 | ||
7157 | begin | |
d00681a7 | 7158 | pragma Assert (No (Access_Disp_Table (Typ))); |
7159 | Set_Access_Disp_Table (Typ, New_Elmt_List); | |
f301a57b | 7160 | |
7161 | -- 1) Generate the primary tag entities | |
7162 | ||
7163 | -- Primary dispatch table containing user-defined primitives | |
7164 | ||
d00681a7 | 7165 | DT_Ptr := Make_Defining_Identifier (Loc, New_External_Name (Tname, 'P')); |
7166 | Set_Etype (DT_Ptr, RTE (RE_Tag)); | |
7167 | Append_Elmt (DT_Ptr, Access_Disp_Table (Typ)); | |
f301a57b | 7168 | |
d00681a7 | 7169 | -- Minimum decoration |
f301a57b | 7170 | |
d00681a7 | 7171 | Set_Ekind (DT_Ptr, E_Variable); |
7172 | Set_Related_Type (DT_Ptr, Typ); | |
f301a57b | 7173 | |
2ff0322d | 7174 | -- Ensure that entities Prim_Ptr and Predef_Prims_Table_Ptr have |
c7dbb79e | 7175 | -- the decoration required by the backend. |
7176 | ||
7177 | -- Odd comment, the back end cannot require anything not properly | |
39a0c1d3 | 7178 | -- documented in einfo. ??? |
2ff0322d | 7179 | |
7180 | Set_Is_Dispatch_Table_Entity (RTE (RE_Prim_Ptr)); | |
7181 | Set_Is_Dispatch_Table_Entity (RTE (RE_Predef_Prims_Table_Ptr)); | |
7182 | ||
d00681a7 | 7183 | -- For CPP types there is no need to build the dispatch tables since |
5682f43c | 7184 | -- they are imported from the C++ side. If the CPP type has an IP then |
7185 | -- we declare now the variable that will store the copy of the C++ tag. | |
d03ada96 | 7186 | -- If the CPP type is an interface, we need the variable as well because |
7187 | -- it becomes the pointer to the corresponding secondary table. | |
f301a57b | 7188 | |
d00681a7 | 7189 | if Is_CPP_Class (Typ) then |
5682f43c | 7190 | if Has_CPP_Constructors (Typ) or else Is_Interface (Typ) then |
24971415 | 7191 | Append_To (Result, |
7192 | Make_Object_Declaration (Loc, | |
7193 | Defining_Identifier => DT_Ptr, | |
83c6c069 | 7194 | Object_Definition => New_Occurrence_Of (RTE (RE_Tag), Loc), |
24971415 | 7195 | Expression => |
7196 | Unchecked_Convert_To (RTE (RE_Tag), | |
83c6c069 | 7197 | New_Occurrence_Of (RTE (RE_Null_Address), Loc)))); |
24971415 | 7198 | |
d00681a7 | 7199 | Set_Is_Statically_Allocated (DT_Ptr, |
7200 | Is_Library_Level_Tagged_Type (Typ)); | |
7201 | end if; | |
9af28f61 | 7202 | |
d00681a7 | 7203 | -- Ada types |
3dbca0d5 | 7204 | |
d00681a7 | 7205 | else |
7206 | -- Primary dispatch table containing predefined primitives | |
acf97c11 | 7207 | |
d00681a7 | 7208 | Predef_Prims_Ptr := |
7209 | Make_Defining_Identifier (Loc, | |
7210 | Chars => New_External_Name (Tname, 'Y')); | |
7211 | Set_Etype (Predef_Prims_Ptr, RTE (RE_Address)); | |
7212 | Append_Elmt (Predef_Prims_Ptr, Access_Disp_Table (Typ)); | |
24971415 | 7213 | |
d00681a7 | 7214 | -- Import the forward declaration of the Dispatch Table wrapper |
d03ada96 | 7215 | -- record (Make_DT will take care of exporting it). |
24971415 | 7216 | |
d00681a7 | 7217 | if Building_Static_DT (Typ) then |
7218 | Set_Dispatch_Table_Wrappers (Typ, New_Elmt_List); | |
17e14451 | 7219 | |
d00681a7 | 7220 | DT := |
7221 | Make_Defining_Identifier (Loc, | |
7222 | Chars => New_External_Name (Tname, 'T')); | |
7223 | ||
7224 | Import_DT (Typ, DT, Is_Secondary_DT => False); | |
7225 | ||
7226 | if Has_DT (Typ) then | |
7227 | Append_To (Result, | |
7228 | Make_Object_Declaration (Loc, | |
7229 | Defining_Identifier => DT_Ptr, | |
7230 | Constant_Present => True, | |
83c6c069 | 7231 | Object_Definition => |
7232 | New_Occurrence_Of (RTE (RE_Tag), Loc), | |
4055a532 | 7233 | Expression => |
d00681a7 | 7234 | Unchecked_Convert_To (RTE (RE_Tag), |
7235 | Make_Attribute_Reference (Loc, | |
4055a532 | 7236 | Prefix => |
d00681a7 | 7237 | Make_Selected_Component (Loc, |
83c6c069 | 7238 | Prefix => New_Occurrence_Of (DT, Loc), |
4055a532 | 7239 | Selector_Name => |
7240 | New_Occurrence_Of | |
7241 | (RTE_Record_Component (RE_Prims_Ptr), Loc)), | |
d00681a7 | 7242 | Attribute_Name => Name_Address)))); |
7243 | ||
7244 | -- Generate the SCIL node for the previous object declaration | |
7245 | -- because it has a tag initialization. | |
7246 | ||
7247 | if Generate_SCIL then | |
7248 | New_Node := | |
7249 | Make_SCIL_Dispatch_Table_Tag_Init (Sloc (Last (Result))); | |
7250 | Set_SCIL_Entity (New_Node, Typ); | |
7251 | Set_SCIL_Node (Last (Result), New_Node); | |
7252 | end if; | |
7253 | ||
7254 | Append_To (Result, | |
7255 | Make_Object_Declaration (Loc, | |
7256 | Defining_Identifier => Predef_Prims_Ptr, | |
7257 | Constant_Present => True, | |
4055a532 | 7258 | Object_Definition => |
83c6c069 | 7259 | New_Occurrence_Of (RTE (RE_Address), Loc), |
4055a532 | 7260 | Expression => |
d00681a7 | 7261 | Make_Attribute_Reference (Loc, |
4055a532 | 7262 | Prefix => |
d00681a7 | 7263 | Make_Selected_Component (Loc, |
83c6c069 | 7264 | Prefix => New_Occurrence_Of (DT, Loc), |
4055a532 | 7265 | Selector_Name => |
7266 | New_Occurrence_Of | |
7267 | (RTE_Record_Component (RE_Predef_Prims), Loc)), | |
d00681a7 | 7268 | Attribute_Name => Name_Address))); |
7269 | ||
7270 | -- No dispatch table required | |
7271 | ||
7272 | else | |
7273 | Append_To (Result, | |
7274 | Make_Object_Declaration (Loc, | |
7275 | Defining_Identifier => DT_Ptr, | |
7276 | Constant_Present => True, | |
83c6c069 | 7277 | Object_Definition => |
7278 | New_Occurrence_Of (RTE (RE_Tag), Loc), | |
4055a532 | 7279 | Expression => |
d00681a7 | 7280 | Unchecked_Convert_To (RTE (RE_Tag), |
7281 | Make_Attribute_Reference (Loc, | |
4055a532 | 7282 | Prefix => |
d00681a7 | 7283 | Make_Selected_Component (Loc, |
83c6c069 | 7284 | Prefix => New_Occurrence_Of (DT, Loc), |
4055a532 | 7285 | Selector_Name => |
7286 | New_Occurrence_Of | |
7287 | (RTE_Record_Component (RE_NDT_Prims_Ptr), | |
7288 | Loc)), | |
d00681a7 | 7289 | Attribute_Name => Name_Address)))); |
7290 | end if; | |
7291 | ||
7292 | Set_Is_True_Constant (DT_Ptr); | |
7293 | Set_Is_Statically_Allocated (DT_Ptr); | |
7294 | end if; | |
7295 | end if; | |
17e14451 | 7296 | |
7297 | -- 2) Generate the secondary tag entities | |
7298 | ||
d00681a7 | 7299 | -- Collect the components associated with secondary dispatch tables |
7300 | ||
a652dd51 | 7301 | if Has_Interfaces (Typ) then |
d00681a7 | 7302 | Collect_Interface_Components (Typ, Typ_Comps); |
f301a57b | 7303 | |
d03ada96 | 7304 | -- For each interface type we build a unique external name associated |
7305 | -- with its secondary dispatch table. This name is used to declare an | |
7306 | -- object that references this secondary dispatch table, whose value | |
7307 | -- will be used for the elaboration of Typ objects, and also for the | |
7308 | -- elaboration of objects of types derived from Typ that do not | |
7309 | -- override the primitives of this interface type. | |
f301a57b | 7310 | |
7311 | Suffix_Index := 1; | |
17e14451 | 7312 | |
d00681a7 | 7313 | -- Note: The value of Suffix_Index must be in sync with the |
7314 | -- Suffix_Index values of secondary dispatch tables generated | |
7315 | -- by Make_DT. | |
17e14451 | 7316 | |
d00681a7 | 7317 | if Is_CPP_Class (Typ) then |
7318 | AI_Tag_Comp := First_Elmt (Typ_Comps); | |
7319 | while Present (AI_Tag_Comp) loop | |
7320 | Get_Secondary_DT_External_Name | |
7321 | (Typ, Related_Type (Node (AI_Tag_Comp)), Suffix_Index); | |
7322 | Typ_Name := Name_Find; | |
17e14451 | 7323 | |
d00681a7 | 7324 | -- Declare variables that will store the copy of the C++ |
d03ada96 | 7325 | -- secondary tags. |
f301a57b | 7326 | |
d00681a7 | 7327 | Iface_DT_Ptr := |
7328 | Make_Defining_Identifier (Loc, | |
7329 | Chars => New_External_Name (Typ_Name, 'P')); | |
7330 | Set_Etype (Iface_DT_Ptr, RTE (RE_Interface_Tag)); | |
7331 | Set_Ekind (Iface_DT_Ptr, E_Variable); | |
7332 | Set_Is_Tag (Iface_DT_Ptr); | |
acf97c11 | 7333 | |
d00681a7 | 7334 | Set_Has_Thunks (Iface_DT_Ptr); |
7335 | Set_Related_Type | |
7336 | (Iface_DT_Ptr, Related_Type (Node (AI_Tag_Comp))); | |
7337 | Append_Elmt (Iface_DT_Ptr, Access_Disp_Table (Typ)); | |
cdb1c38f | 7338 | |
f301a57b | 7339 | Append_To (Result, |
7340 | Make_Object_Declaration (Loc, | |
7341 | Defining_Identifier => Iface_DT_Ptr, | |
83c6c069 | 7342 | Object_Definition => New_Occurrence_Of |
f301a57b | 7343 | (RTE (RE_Interface_Tag), Loc), |
7344 | Expression => | |
7345 | Unchecked_Convert_To (RTE (RE_Interface_Tag), | |
83c6c069 | 7346 | New_Occurrence_Of (RTE (RE_Null_Address), Loc)))); |
f301a57b | 7347 | |
d00681a7 | 7348 | Set_Is_Statically_Allocated (Iface_DT_Ptr, |
7349 | Is_Library_Level_Tagged_Type (Typ)); | |
acf97c11 | 7350 | |
d00681a7 | 7351 | Next_Elmt (AI_Tag_Comp); |
7352 | end loop; | |
acf97c11 | 7353 | |
d00681a7 | 7354 | -- This is not a CPP_Class type |
acf97c11 | 7355 | |
d00681a7 | 7356 | else |
7357 | AI_Tag_Comp := First_Elmt (Typ_Comps); | |
7358 | while Present (AI_Tag_Comp) loop | |
7359 | Get_Secondary_DT_External_Name | |
7360 | (Typ, Related_Type (Node (AI_Tag_Comp)), Suffix_Index); | |
7361 | Typ_Name := Name_Find; | |
17e14451 | 7362 | |
d00681a7 | 7363 | if Building_Static_DT (Typ) then |
7364 | Iface_DT := | |
7365 | Make_Defining_Identifier (Loc, | |
7366 | Chars => New_External_Name | |
7367 | (Typ_Name, 'T', Suffix_Index => -1)); | |
7368 | Import_DT | |
7369 | (Tag_Typ => Related_Type (Node (AI_Tag_Comp)), | |
7370 | DT => Iface_DT, | |
7371 | Is_Secondary_DT => True); | |
7372 | end if; | |
acf97c11 | 7373 | |
d00681a7 | 7374 | -- Secondary dispatch table referencing thunks to user-defined |
7375 | -- primitives covered by this interface. | |
acf97c11 | 7376 | |
d00681a7 | 7377 | Iface_DT_Ptr := |
7378 | Make_Defining_Identifier (Loc, | |
7379 | Chars => New_External_Name (Typ_Name, 'P')); | |
7380 | Set_Etype (Iface_DT_Ptr, RTE (RE_Interface_Tag)); | |
7381 | Set_Ekind (Iface_DT_Ptr, E_Constant); | |
7382 | Set_Is_Tag (Iface_DT_Ptr); | |
7383 | Set_Has_Thunks (Iface_DT_Ptr); | |
7384 | Set_Is_Statically_Allocated (Iface_DT_Ptr, | |
7385 | Is_Library_Level_Tagged_Type (Typ)); | |
7386 | Set_Is_True_Constant (Iface_DT_Ptr); | |
7387 | Set_Related_Type | |
7388 | (Iface_DT_Ptr, Related_Type (Node (AI_Tag_Comp))); | |
7389 | Append_Elmt (Iface_DT_Ptr, Access_Disp_Table (Typ)); | |
7390 | ||
7391 | if Building_Static_DT (Typ) then | |
7392 | Append_To (Result, | |
7393 | Make_Object_Declaration (Loc, | |
7394 | Defining_Identifier => Iface_DT_Ptr, | |
7395 | Constant_Present => True, | |
83c6c069 | 7396 | Object_Definition => New_Occurrence_Of |
d00681a7 | 7397 | (RTE (RE_Interface_Tag), Loc), |
4055a532 | 7398 | Expression => |
d00681a7 | 7399 | Unchecked_Convert_To (RTE (RE_Interface_Tag), |
7400 | Make_Attribute_Reference (Loc, | |
4055a532 | 7401 | Prefix => |
d00681a7 | 7402 | Make_Selected_Component (Loc, |
4055a532 | 7403 | Prefix => |
83c6c069 | 7404 | New_Occurrence_Of (Iface_DT, Loc), |
4055a532 | 7405 | Selector_Name => |
7406 | New_Occurrence_Of | |
7407 | (RTE_Record_Component (RE_Prims_Ptr), | |
7408 | Loc)), | |
d00681a7 | 7409 | Attribute_Name => Name_Address)))); |
7410 | end if; | |
7411 | ||
7412 | -- Secondary dispatch table referencing thunks to predefined | |
7413 | -- primitives. | |
7414 | ||
7415 | Iface_DT_Ptr := | |
7416 | Make_Defining_Identifier (Loc, | |
7417 | Chars => New_External_Name (Typ_Name, 'Y')); | |
7418 | Set_Etype (Iface_DT_Ptr, RTE (RE_Address)); | |
7419 | Set_Ekind (Iface_DT_Ptr, E_Constant); | |
7420 | Set_Is_Tag (Iface_DT_Ptr); | |
7421 | Set_Has_Thunks (Iface_DT_Ptr); | |
7422 | Set_Is_Statically_Allocated (Iface_DT_Ptr, | |
7423 | Is_Library_Level_Tagged_Type (Typ)); | |
7424 | Set_Is_True_Constant (Iface_DT_Ptr); | |
7425 | Set_Related_Type | |
7426 | (Iface_DT_Ptr, Related_Type (Node (AI_Tag_Comp))); | |
7427 | Append_Elmt (Iface_DT_Ptr, Access_Disp_Table (Typ)); | |
7428 | ||
7429 | -- Secondary dispatch table referencing user-defined primitives | |
7430 | -- covered by this interface. | |
7431 | ||
7432 | Iface_DT_Ptr := | |
7433 | Make_Defining_Identifier (Loc, | |
7434 | Chars => New_External_Name (Typ_Name, 'D')); | |
7435 | Set_Etype (Iface_DT_Ptr, RTE (RE_Interface_Tag)); | |
7436 | Set_Ekind (Iface_DT_Ptr, E_Constant); | |
7437 | Set_Is_Tag (Iface_DT_Ptr); | |
7438 | Set_Is_Statically_Allocated (Iface_DT_Ptr, | |
7439 | Is_Library_Level_Tagged_Type (Typ)); | |
7440 | Set_Is_True_Constant (Iface_DT_Ptr); | |
7441 | Set_Related_Type | |
7442 | (Iface_DT_Ptr, Related_Type (Node (AI_Tag_Comp))); | |
7443 | Append_Elmt (Iface_DT_Ptr, Access_Disp_Table (Typ)); | |
7444 | ||
7445 | -- Secondary dispatch table referencing predefined primitives | |
7446 | ||
7447 | Iface_DT_Ptr := | |
7448 | Make_Defining_Identifier (Loc, | |
7449 | Chars => New_External_Name (Typ_Name, 'Z')); | |
7450 | Set_Etype (Iface_DT_Ptr, RTE (RE_Address)); | |
7451 | Set_Ekind (Iface_DT_Ptr, E_Constant); | |
7452 | Set_Is_Tag (Iface_DT_Ptr); | |
7453 | Set_Is_Statically_Allocated (Iface_DT_Ptr, | |
7454 | Is_Library_Level_Tagged_Type (Typ)); | |
7455 | Set_Is_True_Constant (Iface_DT_Ptr); | |
7456 | Set_Related_Type | |
7457 | (Iface_DT_Ptr, Related_Type (Node (AI_Tag_Comp))); | |
7458 | Append_Elmt (Iface_DT_Ptr, Access_Disp_Table (Typ)); | |
7459 | ||
7460 | Next_Elmt (AI_Tag_Comp); | |
7461 | end loop; | |
7462 | end if; | |
17e14451 | 7463 | end if; |
7464 | ||
dffd0a90 | 7465 | -- 3) At the end of Access_Disp_Table, if the type has user-defined |
7466 | -- primitives, we add the entity of an access type declaration that | |
7467 | -- is used by Build_Get_Prim_Op_Address to expand dispatching calls | |
7468 | -- through the primary dispatch table. | |
7469 | ||
7470 | if UI_To_Int (DT_Entry_Count (First_Tag_Component (Typ))) = 0 then | |
7471 | Analyze_List (Result); | |
17e14451 | 7472 | |
7473 | -- Generate: | |
cc60bd16 | 7474 | -- type Typ_DT is array (1 .. Nb_Prims) of Prim_Ptr; |
17e14451 | 7475 | -- type Typ_DT_Acc is access Typ_DT; |
7476 | ||
dffd0a90 | 7477 | else |
7478 | declare | |
7479 | Name_DT_Prims : constant Name_Id := | |
7480 | New_External_Name (Tname, 'G'); | |
7481 | Name_DT_Prims_Acc : constant Name_Id := | |
7482 | New_External_Name (Tname, 'H'); | |
7483 | DT_Prims : constant Entity_Id := | |
7484 | Make_Defining_Identifier (Loc, | |
7485 | Name_DT_Prims); | |
7486 | DT_Prims_Acc : constant Entity_Id := | |
7487 | Make_Defining_Identifier (Loc, | |
7488 | Name_DT_Prims_Acc); | |
7489 | begin | |
7490 | Append_To (Result, | |
7491 | Make_Full_Type_Declaration (Loc, | |
7492 | Defining_Identifier => DT_Prims, | |
7493 | Type_Definition => | |
7494 | Make_Constrained_Array_Definition (Loc, | |
7495 | Discrete_Subtype_Definitions => New_List ( | |
7496 | Make_Range (Loc, | |
7497 | Low_Bound => Make_Integer_Literal (Loc, 1), | |
7498 | High_Bound => Make_Integer_Literal (Loc, | |
7499 | DT_Entry_Count | |
7500 | (First_Tag_Component (Typ))))), | |
7501 | Component_Definition => | |
7502 | Make_Component_Definition (Loc, | |
7503 | Subtype_Indication => | |
83c6c069 | 7504 | New_Occurrence_Of (RTE (RE_Prim_Ptr), Loc))))); |
17e14451 | 7505 | |
dffd0a90 | 7506 | Append_To (Result, |
7507 | Make_Full_Type_Declaration (Loc, | |
7508 | Defining_Identifier => DT_Prims_Acc, | |
7509 | Type_Definition => | |
7510 | Make_Access_To_Object_Definition (Loc, | |
7511 | Subtype_Indication => | |
7512 | New_Occurrence_Of (DT_Prims, Loc)))); | |
17e14451 | 7513 | |
dffd0a90 | 7514 | Append_Elmt (DT_Prims_Acc, Access_Disp_Table (Typ)); |
17e14451 | 7515 | |
dffd0a90 | 7516 | -- Analyze the resulting list and suppress the generation of the |
7517 | -- Init_Proc associated with the above array declaration because | |
7518 | -- this type is never used in object declarations. It is only used | |
7519 | -- to simplify the expansion associated with dispatching calls. | |
17e14451 | 7520 | |
dffd0a90 | 7521 | Analyze_List (Result); |
649455a4 | 7522 | Set_Suppress_Initialization (Base_Type (DT_Prims)); |
cc60bd16 | 7523 | |
ff6293ec | 7524 | -- Disable backend optimizations based on assumptions about the |
7525 | -- aliasing status of objects designated by the access to the | |
7526 | -- dispatch table. Required to handle dispatch tables imported | |
7527 | -- from C++. | |
7528 | ||
7529 | Set_No_Strict_Aliasing (Base_Type (DT_Prims_Acc)); | |
7530 | ||
d00681a7 | 7531 | -- Add the freezing nodes of these declarations; required to avoid |
7532 | -- generating these freezing nodes in wrong scopes (for example in | |
7533 | -- the IC routine of a derivation of Typ). | |
d03ada96 | 7534 | -- What is an "IC routine"? Is "init_proc" meant here??? |
d00681a7 | 7535 | |
d74fc39a | 7536 | Append_List_To (Result, Freeze_Entity (DT_Prims, Typ)); |
7537 | Append_List_To (Result, Freeze_Entity (DT_Prims_Acc, Typ)); | |
d00681a7 | 7538 | |
dffd0a90 | 7539 | -- Mark entity of dispatch table. Required by the back end to |
7540 | -- handle them properly. | |
cc60bd16 | 7541 | |
dffd0a90 | 7542 | Set_Is_Dispatch_Table_Entity (DT_Prims); |
7543 | end; | |
7544 | end if; | |
17e14451 | 7545 | |
11bd2f46 | 7546 | -- Mark entities of dispatch table. Required by the back end to handle |
7547 | -- them properly. | |
7640ed3d | 7548 | |
7549 | if Present (DT) then | |
7550 | Set_Is_Dispatch_Table_Entity (DT); | |
7551 | Set_Is_Dispatch_Table_Entity (Etype (DT)); | |
7552 | end if; | |
7553 | ||
d04be62f | 7554 | if Present (Iface_DT) then |
7555 | Set_Is_Dispatch_Table_Entity (Iface_DT); | |
7556 | Set_Is_Dispatch_Table_Entity (Etype (Iface_DT)); | |
7557 | end if; | |
7558 | ||
d00681a7 | 7559 | if Is_CPP_Class (Root_Type (Typ)) then |
7560 | Set_Ekind (DT_Ptr, E_Variable); | |
7561 | else | |
7562 | Set_Ekind (DT_Ptr, E_Constant); | |
7563 | end if; | |
7564 | ||
cdb1c38f | 7565 | Set_Is_Tag (DT_Ptr); |
7566 | Set_Related_Type (DT_Ptr, Typ); | |
7567 | ||
17e14451 | 7568 | return Result; |
7569 | end Make_Tags; | |
7570 | ||
cd534f03 | 7571 | --------------- |
7572 | -- New_Value -- | |
7573 | --------------- | |
7574 | ||
7575 | function New_Value (From : Node_Id) return Node_Id is | |
7576 | Res : constant Node_Id := Duplicate_Subexpr (From); | |
7577 | begin | |
7578 | if Is_Access_Type (Etype (From)) then | |
9af28f61 | 7579 | return |
7580 | Make_Explicit_Dereference (Sloc (From), | |
7581 | Prefix => Res); | |
cd534f03 | 7582 | else |
7583 | return Res; | |
7584 | end if; | |
7585 | end New_Value; | |
7586 | ||
ee6ba406 | 7587 | ----------------------------------- |
7588 | -- Original_View_In_Visible_Part -- | |
7589 | ----------------------------------- | |
7590 | ||
7591 | function Original_View_In_Visible_Part (Typ : Entity_Id) return Boolean is | |
7592 | Scop : constant Entity_Id := Scope (Typ); | |
7593 | ||
7594 | begin | |
7595 | -- The scope must be a package | |
7596 | ||
65149aa0 | 7597 | if not Is_Package_Or_Generic_Package (Scop) then |
ee6ba406 | 7598 | return False; |
7599 | end if; | |
7600 | ||
7601 | -- A type with a private declaration has a private view declared in | |
7602 | -- the visible part. | |
7603 | ||
7604 | if Has_Private_Declaration (Typ) then | |
7605 | return True; | |
7606 | end if; | |
7607 | ||
7608 | return List_Containing (Parent (Typ)) = | |
e8b4793a | 7609 | Visible_Declarations (Package_Specification (Scop)); |
ee6ba406 | 7610 | end Original_View_In_Visible_Part; |
7611 | ||
d62940bf | 7612 | ------------------ |
7613 | -- Prim_Op_Kind -- | |
7614 | ------------------ | |
7615 | ||
7616 | function Prim_Op_Kind | |
7617 | (Prim : Entity_Id; | |
7618 | Typ : Entity_Id) return Node_Id | |
7619 | is | |
7620 | Full_Typ : Entity_Id := Typ; | |
7621 | Loc : constant Source_Ptr := Sloc (Prim); | |
68f95949 | 7622 | Prim_Op : Entity_Id; |
d62940bf | 7623 | |
7624 | begin | |
7625 | -- Retrieve the original primitive operation | |
7626 | ||
fc2907f6 | 7627 | Prim_Op := Ultimate_Alias (Prim); |
d62940bf | 7628 | |
7629 | if Ekind (Typ) = E_Record_Type | |
7630 | and then Present (Corresponding_Concurrent_Type (Typ)) | |
7631 | then | |
7632 | Full_Typ := Corresponding_Concurrent_Type (Typ); | |
7633 | end if; | |
7634 | ||
d77e048b | 7635 | -- When a private tagged type is completed by a concurrent type, |
7636 | -- retrieve the full view. | |
7637 | ||
7638 | if Is_Private_Type (Full_Typ) then | |
7639 | Full_Typ := Full_View (Full_Typ); | |
7640 | end if; | |
7641 | ||
d62940bf | 7642 | if Ekind (Prim_Op) = E_Function then |
7643 | ||
7644 | -- Protected function | |
7645 | ||
7646 | if Ekind (Full_Typ) = E_Protected_Type then | |
83c6c069 | 7647 | return New_Occurrence_Of (RTE (RE_POK_Protected_Function), Loc); |
d62940bf | 7648 | |
76a1c25b | 7649 | -- Task function |
7650 | ||
7651 | elsif Ekind (Full_Typ) = E_Task_Type then | |
83c6c069 | 7652 | return New_Occurrence_Of (RTE (RE_POK_Task_Function), Loc); |
76a1c25b | 7653 | |
d62940bf | 7654 | -- Regular function |
7655 | ||
7656 | else | |
83c6c069 | 7657 | return New_Occurrence_Of (RTE (RE_POK_Function), Loc); |
d62940bf | 7658 | end if; |
7659 | ||
7660 | else | |
7661 | pragma Assert (Ekind (Prim_Op) = E_Procedure); | |
7662 | ||
7663 | if Ekind (Full_Typ) = E_Protected_Type then | |
7664 | ||
7665 | -- Protected entry | |
7666 | ||
7667 | if Is_Primitive_Wrapper (Prim_Op) | |
7668 | and then Ekind (Wrapped_Entity (Prim_Op)) = E_Entry | |
7669 | then | |
83c6c069 | 7670 | return New_Occurrence_Of (RTE (RE_POK_Protected_Entry), Loc); |
d62940bf | 7671 | |
7672 | -- Protected procedure | |
7673 | ||
7674 | else | |
83c6c069 | 7675 | return |
7676 | New_Occurrence_Of (RTE (RE_POK_Protected_Procedure), Loc); | |
d62940bf | 7677 | end if; |
7678 | ||
7679 | elsif Ekind (Full_Typ) = E_Task_Type then | |
7680 | ||
7681 | -- Task entry | |
7682 | ||
7683 | if Is_Primitive_Wrapper (Prim_Op) | |
7684 | and then Ekind (Wrapped_Entity (Prim_Op)) = E_Entry | |
7685 | then | |
83c6c069 | 7686 | return New_Occurrence_Of (RTE (RE_POK_Task_Entry), Loc); |
d62940bf | 7687 | |
7688 | -- Task "procedure". These are the internally Expander-generated | |
7689 | -- procedures (task body for instance). | |
7690 | ||
7691 | else | |
83c6c069 | 7692 | return New_Occurrence_Of (RTE (RE_POK_Task_Procedure), Loc); |
d62940bf | 7693 | end if; |
7694 | ||
7695 | -- Regular procedure | |
7696 | ||
7697 | else | |
83c6c069 | 7698 | return New_Occurrence_Of (RTE (RE_POK_Procedure), Loc); |
d62940bf | 7699 | end if; |
7700 | end if; | |
7701 | end Prim_Op_Kind; | |
7702 | ||
725a69d2 | 7703 | ------------------------ |
7704 | -- Register_Primitive -- | |
7705 | ------------------------ | |
7706 | ||
49260fa5 | 7707 | function Register_Primitive |
725a69d2 | 7708 | (Loc : Source_Ptr; |
49260fa5 | 7709 | Prim : Entity_Id) return List_Id |
725a69d2 | 7710 | is |
cdb1c38f | 7711 | DT_Ptr : Entity_Id; |
7712 | Iface_Prim : Entity_Id; | |
7713 | Iface_Typ : Entity_Id; | |
7714 | Iface_DT_Ptr : Entity_Id; | |
7715 | Iface_DT_Elmt : Elmt_Id; | |
49260fa5 | 7716 | L : constant List_Id := New_List; |
cdb1c38f | 7717 | Pos : Uint; |
7718 | Tag : Entity_Id; | |
cc60bd16 | 7719 | Tag_Typ : Entity_Id; |
cdb1c38f | 7720 | Thunk_Id : Entity_Id; |
7721 | Thunk_Code : Node_Id; | |
725a69d2 | 7722 | |
7723 | begin | |
7724 | pragma Assert (not Restriction_Active (No_Dispatching_Calls)); | |
79500ea0 | 7725 | pragma Assert (VM_Target = No_VM); |
725a69d2 | 7726 | |
3f8cf2d2 | 7727 | -- Do not register in the dispatch table eliminated primitives |
7728 | ||
7729 | if not RTE_Available (RE_Tag) | |
7730 | or else Is_Eliminated (Ultimate_Alias (Prim)) | |
7731 | then | |
49260fa5 | 7732 | return L; |
725a69d2 | 7733 | end if; |
7734 | ||
a652dd51 | 7735 | if not Present (Interface_Alias (Prim)) then |
cc60bd16 | 7736 | Tag_Typ := Scope (DTC_Entity (Prim)); |
acf97c11 | 7737 | Pos := DT_Position (Prim); |
cc60bd16 | 7738 | Tag := First_Tag_Component (Tag_Typ); |
725a69d2 | 7739 | |
7740 | if Is_Predefined_Dispatching_Operation (Prim) | |
7741 | or else Is_Predefined_Dispatching_Alias (Prim) | |
7742 | then | |
cc60bd16 | 7743 | DT_Ptr := |
7744 | Node (Next_Elmt (First_Elmt (Access_Disp_Table (Tag_Typ)))); | |
7745 | ||
49260fa5 | 7746 | Append_To (L, |
725a69d2 | 7747 | Build_Set_Predefined_Prim_Op_Address (Loc, |
83c6c069 | 7748 | Tag_Node => New_Occurrence_Of (DT_Ptr, Loc), |
725a69d2 | 7749 | Position => Pos, |
acf97c11 | 7750 | Address_Node => |
cc60bd16 | 7751 | Unchecked_Convert_To (RTE (RE_Prim_Ptr), |
acf97c11 | 7752 | Make_Attribute_Reference (Loc, |
83c6c069 | 7753 | Prefix => New_Occurrence_Of (Prim, Loc), |
acf97c11 | 7754 | Attribute_Name => Name_Unrestricted_Access)))); |
725a69d2 | 7755 | |
9e7de1e1 | 7756 | -- Register copy of the pointer to the 'size primitive in the TSD |
cc60bd16 | 7757 | |
7758 | if Chars (Prim) = Name_uSize | |
7759 | and then RTE_Record_Component_Available (RE_Size_Func) | |
7760 | then | |
7761 | DT_Ptr := Node (First_Elmt (Access_Disp_Table (Tag_Typ))); | |
49260fa5 | 7762 | Append_To (L, |
cc60bd16 | 7763 | Build_Set_Size_Function (Loc, |
83c6c069 | 7764 | Tag_Node => New_Occurrence_Of (DT_Ptr, Loc), |
cc60bd16 | 7765 | Size_Func => Prim)); |
7766 | end if; | |
7767 | ||
725a69d2 | 7768 | else |
7769 | pragma Assert (Pos /= Uint_0 and then Pos <= DT_Entry_Count (Tag)); | |
7770 | ||
d00681a7 | 7771 | -- Skip registration of primitives located in the C++ part of the |
7772 | -- dispatch table. Their slot is set by the IC routine. | |
7773 | ||
7774 | if not Is_CPP_Class (Root_Type (Tag_Typ)) | |
7775 | or else Pos > CPP_Num_Prims (Tag_Typ) | |
7776 | then | |
7777 | DT_Ptr := Node (First_Elmt (Access_Disp_Table (Tag_Typ))); | |
7778 | Append_To (L, | |
7779 | Build_Set_Prim_Op_Address (Loc, | |
7780 | Typ => Tag_Typ, | |
83c6c069 | 7781 | Tag_Node => New_Occurrence_Of (DT_Ptr, Loc), |
d00681a7 | 7782 | Position => Pos, |
7783 | Address_Node => | |
7784 | Unchecked_Convert_To (RTE (RE_Prim_Ptr), | |
7785 | Make_Attribute_Reference (Loc, | |
83c6c069 | 7786 | Prefix => New_Occurrence_Of (Prim, Loc), |
d00681a7 | 7787 | Attribute_Name => Name_Unrestricted_Access)))); |
7788 | end if; | |
725a69d2 | 7789 | end if; |
7790 | ||
7791 | -- Ada 2005 (AI-251): Primitive associated with an interface type | |
7792 | -- Generate the code of the thunk only if the interface type is not an | |
7793 | -- immediate ancestor of Typ; otherwise the dispatch table associated | |
7794 | -- with the interface is the primary dispatch table and we have nothing | |
7795 | -- else to do here. | |
7796 | ||
7797 | else | |
cc60bd16 | 7798 | Tag_Typ := Find_Dispatching_Type (Alias (Prim)); |
a652dd51 | 7799 | Iface_Typ := Find_Dispatching_Type (Interface_Alias (Prim)); |
725a69d2 | 7800 | |
7801 | pragma Assert (Is_Interface (Iface_Typ)); | |
7802 | ||
c8da6114 | 7803 | -- No action needed for interfaces that are ancestors of Typ because |
7804 | -- their primitives are located in the primary dispatch table. | |
7805 | ||
cb4af01d | 7806 | if Is_Ancestor (Iface_Typ, Tag_Typ, Use_Full_View => True) then |
c8da6114 | 7807 | return L; |
d00681a7 | 7808 | |
7809 | -- No action needed for primitives located in the C++ part of the | |
7810 | -- dispatch table. Their slot is set by the IC routine. | |
7811 | ||
7812 | elsif Is_CPP_Class (Root_Type (Tag_Typ)) | |
7813 | and then DT_Position (Alias (Prim)) <= CPP_Num_Prims (Tag_Typ) | |
7814 | and then not Is_Predefined_Dispatching_Operation (Prim) | |
7815 | and then not Is_Predefined_Dispatching_Alias (Prim) | |
7816 | then | |
7817 | return L; | |
c8da6114 | 7818 | end if; |
7819 | ||
17e14451 | 7820 | Expand_Interface_Thunk (Prim, Thunk_Id, Thunk_Code); |
725a69d2 | 7821 | |
cb4af01d | 7822 | if not Is_Ancestor (Iface_Typ, Tag_Typ, Use_Full_View => True) |
725a69d2 | 7823 | and then Present (Thunk_Code) |
7824 | then | |
725a69d2 | 7825 | -- Generate the code necessary to fill the appropriate entry of |
7826 | -- the secondary dispatch table of Prim's controlling type with | |
7827 | -- Thunk_Id's address. | |
7828 | ||
cc60bd16 | 7829 | Iface_DT_Elmt := Find_Interface_ADT (Tag_Typ, Iface_Typ); |
cdb1c38f | 7830 | Iface_DT_Ptr := Node (Iface_DT_Elmt); |
7831 | pragma Assert (Has_Thunks (Iface_DT_Ptr)); | |
7832 | ||
a652dd51 | 7833 | Iface_Prim := Interface_Alias (Prim); |
acf97c11 | 7834 | Pos := DT_Position (Iface_Prim); |
7835 | Tag := First_Tag_Component (Iface_Typ); | |
49260fa5 | 7836 | |
7837 | Prepend_To (L, Thunk_Code); | |
725a69d2 | 7838 | |
7839 | if Is_Predefined_Dispatching_Operation (Prim) | |
7840 | or else Is_Predefined_Dispatching_Alias (Prim) | |
7841 | then | |
cdb1c38f | 7842 | Append_To (L, |
725a69d2 | 7843 | Build_Set_Predefined_Prim_Op_Address (Loc, |
acf97c11 | 7844 | Tag_Node => |
83c6c069 | 7845 | New_Occurrence_Of (Node (Next_Elmt (Iface_DT_Elmt)), Loc), |
725a69d2 | 7846 | Position => Pos, |
7847 | Address_Node => | |
cc60bd16 | 7848 | Unchecked_Convert_To (RTE (RE_Prim_Ptr), |
acf97c11 | 7849 | Make_Attribute_Reference (Loc, |
83c6c069 | 7850 | Prefix => New_Occurrence_Of (Thunk_Id, Loc), |
acf97c11 | 7851 | Attribute_Name => Name_Unrestricted_Access)))); |
cdb1c38f | 7852 | |
acf97c11 | 7853 | Next_Elmt (Iface_DT_Elmt); |
cdb1c38f | 7854 | Next_Elmt (Iface_DT_Elmt); |
7855 | Iface_DT_Ptr := Node (Iface_DT_Elmt); | |
7856 | pragma Assert (not Has_Thunks (Iface_DT_Ptr)); | |
7857 | ||
7858 | Append_To (L, | |
7859 | Build_Set_Predefined_Prim_Op_Address (Loc, | |
acf97c11 | 7860 | Tag_Node => |
83c6c069 | 7861 | New_Occurrence_Of (Node (Next_Elmt (Iface_DT_Elmt)), Loc), |
cdb1c38f | 7862 | Position => Pos, |
7863 | Address_Node => | |
cc60bd16 | 7864 | Unchecked_Convert_To (RTE (RE_Prim_Ptr), |
acf97c11 | 7865 | Make_Attribute_Reference (Loc, |
4055a532 | 7866 | Prefix => |
83c6c069 | 7867 | New_Occurrence_Of (Alias (Prim), Loc), |
acf97c11 | 7868 | Attribute_Name => Name_Unrestricted_Access)))); |
cdb1c38f | 7869 | |
725a69d2 | 7870 | else |
7871 | pragma Assert (Pos /= Uint_0 | |
7872 | and then Pos <= DT_Entry_Count (Tag)); | |
7873 | ||
cdb1c38f | 7874 | Append_To (L, |
7875 | Build_Set_Prim_Op_Address (Loc, | |
7876 | Typ => Iface_Typ, | |
83c6c069 | 7877 | Tag_Node => New_Occurrence_Of (Iface_DT_Ptr, Loc), |
cdb1c38f | 7878 | Position => Pos, |
acf97c11 | 7879 | Address_Node => |
cc60bd16 | 7880 | Unchecked_Convert_To (RTE (RE_Prim_Ptr), |
acf97c11 | 7881 | Make_Attribute_Reference (Loc, |
83c6c069 | 7882 | Prefix => New_Occurrence_Of (Thunk_Id, Loc), |
acf97c11 | 7883 | Attribute_Name => Name_Unrestricted_Access)))); |
cdb1c38f | 7884 | |
acf97c11 | 7885 | Next_Elmt (Iface_DT_Elmt); |
cdb1c38f | 7886 | Next_Elmt (Iface_DT_Elmt); |
7887 | Iface_DT_Ptr := Node (Iface_DT_Elmt); | |
7888 | pragma Assert (not Has_Thunks (Iface_DT_Ptr)); | |
7889 | ||
7890 | Append_To (L, | |
725a69d2 | 7891 | Build_Set_Prim_Op_Address (Loc, |
7892 | Typ => Iface_Typ, | |
83c6c069 | 7893 | Tag_Node => New_Occurrence_Of (Iface_DT_Ptr, Loc), |
725a69d2 | 7894 | Position => Pos, |
acf97c11 | 7895 | Address_Node => |
cc60bd16 | 7896 | Unchecked_Convert_To (RTE (RE_Prim_Ptr), |
acf97c11 | 7897 | Make_Attribute_Reference (Loc, |
4055a532 | 7898 | Prefix => |
83c6c069 | 7899 | New_Occurrence_Of (Alias (Prim), Loc), |
acf97c11 | 7900 | Attribute_Name => Name_Unrestricted_Access)))); |
cdb1c38f | 7901 | |
725a69d2 | 7902 | end if; |
7903 | end if; | |
7904 | end if; | |
49260fa5 | 7905 | |
7906 | return L; | |
725a69d2 | 7907 | end Register_Primitive; |
7908 | ||
ee6ba406 | 7909 | ------------------------- |
7910 | -- Set_All_DT_Position -- | |
7911 | ------------------------- | |
7912 | ||
7913 | procedure Set_All_DT_Position (Typ : Entity_Id) is | |
ee6ba406 | 7914 | |
cf365b48 | 7915 | function In_Predef_Prims_DT (Prim : Entity_Id) return Boolean; |
7916 | -- Returns True if Prim is located in the dispatch table of | |
7917 | -- predefined primitives | |
7918 | ||
aad6babd | 7919 | procedure Validate_Position (Prim : Entity_Id); |
36b938a3 | 7920 | -- Check that the position assigned to Prim is completely safe |
aad6babd | 7921 | -- (it has not been assigned to a previously defined primitive |
7922 | -- operation of Typ) | |
7923 | ||
cf365b48 | 7924 | ------------------------ |
7925 | -- In_Predef_Prims_DT -- | |
7926 | ------------------------ | |
7927 | ||
7928 | function In_Predef_Prims_DT (Prim : Entity_Id) return Boolean is | |
7929 | E : Entity_Id; | |
7930 | ||
7931 | begin | |
7932 | -- Predefined primitives | |
7933 | ||
7934 | if Is_Predefined_Dispatching_Operation (Prim) then | |
7935 | return True; | |
7936 | ||
7937 | -- Renamings of predefined primitives | |
7938 | ||
7939 | elsif Present (Alias (Prim)) | |
7940 | and then Is_Predefined_Dispatching_Operation (Ultimate_Alias (Prim)) | |
7941 | then | |
7942 | if Chars (Ultimate_Alias (Prim)) /= Name_Op_Eq then | |
7943 | return True; | |
7944 | ||
7945 | -- User-defined renamings of predefined equality have their own | |
7946 | -- slot in the primary dispatch table | |
7947 | ||
7948 | else | |
7949 | E := Prim; | |
7950 | while Present (Alias (E)) loop | |
7951 | if Comes_From_Source (E) then | |
7952 | return False; | |
7953 | end if; | |
7954 | ||
7955 | E := Alias (E); | |
7956 | end loop; | |
7957 | ||
7958 | return not Comes_From_Source (E); | |
7959 | end if; | |
7960 | ||
7961 | -- User-defined primitives | |
7962 | ||
7963 | else | |
7964 | return False; | |
7965 | end if; | |
7966 | end In_Predef_Prims_DT; | |
7967 | ||
aad6babd | 7968 | ----------------------- |
7969 | -- Validate_Position -- | |
7970 | ----------------------- | |
7971 | ||
7972 | procedure Validate_Position (Prim : Entity_Id) is | |
af647dc7 | 7973 | Op_Elmt : Elmt_Id; |
7974 | Op : Entity_Id; | |
d62940bf | 7975 | |
aad6babd | 7976 | begin |
af647dc7 | 7977 | -- Aliased primitives are safe |
7978 | ||
7979 | if Present (Alias (Prim)) then | |
7980 | return; | |
7981 | end if; | |
7982 | ||
7983 | Op_Elmt := First_Elmt (Primitive_Operations (Typ)); | |
7984 | while Present (Op_Elmt) loop | |
7985 | Op := Node (Op_Elmt); | |
7986 | ||
7987 | -- No need to check against itself | |
7988 | ||
7989 | if Op = Prim then | |
7990 | null; | |
7991 | ||
aad6babd | 7992 | -- Primitive operations covering abstract interfaces are |
7993 | -- allocated later | |
7994 | ||
a652dd51 | 7995 | elsif Present (Interface_Alias (Op)) then |
aad6babd | 7996 | null; |
7997 | ||
68f95949 | 7998 | -- Predefined dispatching operations are completely safe. They |
7999 | -- are allocated at fixed positions in a separate table. | |
aad6babd | 8000 | |
af647dc7 | 8001 | elsif Is_Predefined_Dispatching_Operation (Op) |
8002 | or else Is_Predefined_Dispatching_Alias (Op) | |
8003 | then | |
aad6babd | 8004 | null; |
ee6ba406 | 8005 | |
aad6babd | 8006 | -- Aliased subprograms are safe |
8007 | ||
af647dc7 | 8008 | elsif Present (Alias (Op)) then |
aad6babd | 8009 | null; |
8010 | ||
af647dc7 | 8011 | elsif DT_Position (Op) = DT_Position (Prim) |
8012 | and then not Is_Predefined_Dispatching_Operation (Op) | |
8013 | and then not Is_Predefined_Dispatching_Operation (Prim) | |
8014 | and then not Is_Predefined_Dispatching_Alias (Op) | |
8015 | and then not Is_Predefined_Dispatching_Alias (Prim) | |
8016 | then | |
d62940bf | 8017 | |
8018 | -- Handle aliased subprograms | |
8019 | ||
8020 | declare | |
8021 | Op_1 : Entity_Id; | |
8022 | Op_2 : Entity_Id; | |
8023 | ||
8024 | begin | |
af647dc7 | 8025 | Op_1 := Op; |
d62940bf | 8026 | loop |
8027 | if Present (Overridden_Operation (Op_1)) then | |
8028 | Op_1 := Overridden_Operation (Op_1); | |
8029 | elsif Present (Alias (Op_1)) then | |
8030 | Op_1 := Alias (Op_1); | |
8031 | else | |
8032 | exit; | |
8033 | end if; | |
8034 | end loop; | |
8035 | ||
8036 | Op_2 := Prim; | |
8037 | loop | |
8038 | if Present (Overridden_Operation (Op_2)) then | |
8039 | Op_2 := Overridden_Operation (Op_2); | |
8040 | elsif Present (Alias (Op_2)) then | |
8041 | Op_2 := Alias (Op_2); | |
8042 | else | |
8043 | exit; | |
8044 | end if; | |
8045 | end loop; | |
8046 | ||
8047 | if Op_1 /= Op_2 then | |
8048 | raise Program_Error; | |
8049 | end if; | |
8050 | end; | |
aad6babd | 8051 | end if; |
8052 | ||
af647dc7 | 8053 | Next_Elmt (Op_Elmt); |
aad6babd | 8054 | end loop; |
8055 | end Validate_Position; | |
8056 | ||
af647dc7 | 8057 | -- Local variables |
8058 | ||
8059 | Parent_Typ : constant Entity_Id := Etype (Typ); | |
af647dc7 | 8060 | First_Prim : constant Elmt_Id := First_Elmt (Primitive_Operations (Typ)); |
8061 | The_Tag : constant Entity_Id := First_Tag_Component (Typ); | |
8062 | ||
651a38ec | 8063 | Adjusted : Boolean := False; |
8064 | Finalized : Boolean := False; | |
af647dc7 | 8065 | |
343d35dc | 8066 | Count_Prim : Nat; |
8067 | DT_Length : Nat; | |
8068 | Nb_Prim : Nat; | |
af647dc7 | 8069 | Prim : Entity_Id; |
8070 | Prim_Elmt : Elmt_Id; | |
8071 | ||
aad6babd | 8072 | -- Start of processing for Set_All_DT_Position |
8073 | ||
8074 | begin | |
a652dd51 | 8075 | pragma Assert (Present (First_Tag_Component (Typ))); |
8076 | ||
b3dd22b3 | 8077 | -- Set the DT_Position for each primitive operation. Perform some sanity |
8078 | -- checks to avoid building inconsistent dispatch tables. | |
ee6ba406 | 8079 | |
b3dd22b3 | 8080 | -- First stage: Set the DTC entity of all the primitive operations. This |
8081 | -- is required to properly read the DT_Position attribute in the latter | |
8082 | -- stages. | |
ee6ba406 | 8083 | |
343d35dc | 8084 | Prim_Elmt := First_Prim; |
8085 | Count_Prim := 0; | |
8086 | while Present (Prim_Elmt) loop | |
8087 | Prim := Node (Prim_Elmt); | |
ee6ba406 | 8088 | |
343d35dc | 8089 | -- Predefined primitives have a separate dispatch table |
ee6ba406 | 8090 | |
cf365b48 | 8091 | if not In_Predef_Prims_DT (Prim) then |
343d35dc | 8092 | Count_Prim := Count_Prim + 1; |
8093 | end if; | |
ee6ba406 | 8094 | |
725a69d2 | 8095 | Set_DTC_Entity_Value (Typ, Prim); |
ee6ba406 | 8096 | |
343d35dc | 8097 | -- Clear any previous value of the DT_Position attribute. In this |
8098 | -- way we ensure that the final position of all the primitives is | |
36b938a3 | 8099 | -- established by the following stages of this algorithm. |
ee6ba406 | 8100 | |
343d35dc | 8101 | Set_DT_Position (Prim, No_Uint); |
ee6ba406 | 8102 | |
343d35dc | 8103 | Next_Elmt (Prim_Elmt); |
8104 | end loop; | |
ee6ba406 | 8105 | |
343d35dc | 8106 | declare |
acf97c11 | 8107 | Fixed_Prim : array (Int range 0 .. Count_Prim) of Boolean := |
8108 | (others => False); | |
8109 | ||
343d35dc | 8110 | E : Entity_Id; |
ee6ba406 | 8111 | |
725a69d2 | 8112 | procedure Handle_Inherited_Private_Subprograms (Typ : Entity_Id); |
8113 | -- Called if Typ is declared in a nested package or a public child | |
8114 | -- package to handle inherited primitives that were inherited by Typ | |
509f74d3 | 8115 | -- in the visible part, but whose declaration was deferred because |
725a69d2 | 8116 | -- the parent operation was private and not visible at that point. |
8117 | ||
343d35dc | 8118 | procedure Set_Fixed_Prim (Pos : Nat); |
8119 | -- Sets to true an element of the Fixed_Prim table to indicate | |
8120 | -- that this entry of the dispatch table of Typ is occupied. | |
ee6ba406 | 8121 | |
725a69d2 | 8122 | ------------------------------------------ |
8123 | -- Handle_Inherited_Private_Subprograms -- | |
8124 | ------------------------------------------ | |
8125 | ||
8126 | procedure Handle_Inherited_Private_Subprograms (Typ : Entity_Id) is | |
8127 | Op_List : Elist_Id; | |
8128 | Op_Elmt : Elmt_Id; | |
8129 | Op_Elmt_2 : Elmt_Id; | |
8130 | Prim_Op : Entity_Id; | |
8131 | Parent_Subp : Entity_Id; | |
8132 | ||
8133 | begin | |
8134 | Op_List := Primitive_Operations (Typ); | |
8135 | ||
8136 | Op_Elmt := First_Elmt (Op_List); | |
8137 | while Present (Op_Elmt) loop | |
8138 | Prim_Op := Node (Op_Elmt); | |
8139 | ||
8140 | -- Search primitives that are implicit operations with an | |
8141 | -- internal name whose parent operation has a normal name. | |
8142 | ||
8143 | if Present (Alias (Prim_Op)) | |
8144 | and then Find_Dispatching_Type (Alias (Prim_Op)) /= Typ | |
8145 | and then not Comes_From_Source (Prim_Op) | |
8146 | and then Is_Internal_Name (Chars (Prim_Op)) | |
8147 | and then not Is_Internal_Name (Chars (Alias (Prim_Op))) | |
8148 | then | |
8149 | Parent_Subp := Alias (Prim_Op); | |
8150 | ||
8151 | -- Check if the type has an explicit overriding for this | |
8152 | -- primitive. | |
8153 | ||
8154 | Op_Elmt_2 := Next_Elmt (Op_Elmt); | |
8155 | while Present (Op_Elmt_2) loop | |
8156 | if Chars (Node (Op_Elmt_2)) = Chars (Parent_Subp) | |
8157 | and then Type_Conformant (Prim_Op, Node (Op_Elmt_2)) | |
8158 | then | |
8159 | Set_DT_Position (Prim_Op, DT_Position (Parent_Subp)); | |
8160 | Set_DT_Position (Node (Op_Elmt_2), | |
8161 | DT_Position (Parent_Subp)); | |
8162 | Set_Fixed_Prim (UI_To_Int (DT_Position (Prim_Op))); | |
8163 | ||
8164 | goto Next_Primitive; | |
8165 | end if; | |
8166 | ||
8167 | Next_Elmt (Op_Elmt_2); | |
8168 | end loop; | |
8169 | end if; | |
8170 | ||
8171 | <<Next_Primitive>> | |
8172 | Next_Elmt (Op_Elmt); | |
8173 | end loop; | |
8174 | end Handle_Inherited_Private_Subprograms; | |
8175 | ||
343d35dc | 8176 | -------------------- |
8177 | -- Set_Fixed_Prim -- | |
8178 | -------------------- | |
ee6ba406 | 8179 | |
343d35dc | 8180 | procedure Set_Fixed_Prim (Pos : Nat) is |
ee6ba406 | 8181 | begin |
9e7de1e1 | 8182 | pragma Assert (Pos <= Count_Prim); |
343d35dc | 8183 | Fixed_Prim (Pos) := True; |
8184 | exception | |
8185 | when Constraint_Error => | |
8186 | raise Program_Error; | |
8187 | end Set_Fixed_Prim; | |
ee6ba406 | 8188 | |
343d35dc | 8189 | begin |
725a69d2 | 8190 | -- In case of nested packages and public child package it may be |
8191 | -- necessary a special management on inherited subprograms so that | |
8192 | -- the dispatch table is properly filled. | |
8193 | ||
8194 | if Ekind (Scope (Scope (Typ))) = E_Package | |
8195 | and then Scope (Scope (Typ)) /= Standard_Standard | |
8196 | and then ((Is_Derived_Type (Typ) and then not Is_Private_Type (Typ)) | |
8197 | or else | |
8198 | (Nkind (Parent (Typ)) = N_Private_Extension_Declaration | |
8199 | and then Is_Generic_Type (Typ))) | |
8200 | and then In_Open_Scopes (Scope (Etype (Typ))) | |
5b990e08 | 8201 | and then Is_Base_Type (Typ) |
725a69d2 | 8202 | then |
8203 | Handle_Inherited_Private_Subprograms (Typ); | |
8204 | end if; | |
8205 | ||
343d35dc | 8206 | -- Second stage: Register fixed entries |
ee6ba406 | 8207 | |
343d35dc | 8208 | Nb_Prim := 0; |
8209 | Prim_Elmt := First_Prim; | |
8210 | while Present (Prim_Elmt) loop | |
8211 | Prim := Node (Prim_Elmt); | |
ee6ba406 | 8212 | |
343d35dc | 8213 | -- Predefined primitives have a separate table and all its |
8214 | -- entries are at predefined fixed positions. | |
ee6ba406 | 8215 | |
cf365b48 | 8216 | if In_Predef_Prims_DT (Prim) then |
8217 | if Is_Predefined_Dispatching_Operation (Prim) then | |
8218 | Set_DT_Position (Prim, Default_Prim_Op_Position (Prim)); | |
ee6ba406 | 8219 | |
cf365b48 | 8220 | else pragma Assert (Present (Alias (Prim))); |
8221 | Set_DT_Position (Prim, | |
8222 | Default_Prim_Op_Position (Ultimate_Alias (Prim))); | |
8223 | end if; | |
d62940bf | 8224 | |
343d35dc | 8225 | -- Overriding primitives of ancestor abstract interfaces |
ee6ba406 | 8226 | |
a652dd51 | 8227 | elsif Present (Interface_Alias (Prim)) |
8228 | and then Is_Ancestor | |
cb4af01d | 8229 | (Find_Dispatching_Type (Interface_Alias (Prim)), Typ, |
8230 | Use_Full_View => True) | |
343d35dc | 8231 | then |
8232 | pragma Assert (DT_Position (Prim) = No_Uint | |
a652dd51 | 8233 | and then Present (DTC_Entity (Interface_Alias (Prim)))); |
ee6ba406 | 8234 | |
a652dd51 | 8235 | E := Interface_Alias (Prim); |
343d35dc | 8236 | Set_DT_Position (Prim, DT_Position (E)); |
aad6babd | 8237 | |
343d35dc | 8238 | pragma Assert |
8239 | (DT_Position (Alias (Prim)) = No_Uint | |
8240 | or else DT_Position (Alias (Prim)) = DT_Position (E)); | |
8241 | Set_DT_Position (Alias (Prim), DT_Position (E)); | |
8242 | Set_Fixed_Prim (UI_To_Int (DT_Position (Prim))); | |
af647dc7 | 8243 | |
343d35dc | 8244 | -- Overriding primitives must use the same entry as the |
36b938a3 | 8245 | -- overridden primitive. |
af647dc7 | 8246 | |
a652dd51 | 8247 | elsif not Present (Interface_Alias (Prim)) |
343d35dc | 8248 | and then Present (Alias (Prim)) |
17e14451 | 8249 | and then Chars (Prim) = Chars (Alias (Prim)) |
343d35dc | 8250 | and then Find_Dispatching_Type (Alias (Prim)) /= Typ |
a652dd51 | 8251 | and then Is_Ancestor |
cb4af01d | 8252 | (Find_Dispatching_Type (Alias (Prim)), Typ, |
8253 | Use_Full_View => True) | |
343d35dc | 8254 | and then Present (DTC_Entity (Alias (Prim))) |
af647dc7 | 8255 | then |
343d35dc | 8256 | E := Alias (Prim); |
8257 | Set_DT_Position (Prim, DT_Position (E)); | |
aad6babd | 8258 | |
343d35dc | 8259 | if not Is_Predefined_Dispatching_Alias (E) then |
8260 | Set_Fixed_Prim (UI_To_Int (DT_Position (E))); | |
8261 | end if; | |
9dfe12ae | 8262 | end if; |
ee6ba406 | 8263 | |
aad6babd | 8264 | Next_Elmt (Prim_Elmt); |
8265 | end loop; | |
8266 | ||
b381b314 | 8267 | -- Third stage: Fix the position of all the new primitives. |
343d35dc | 8268 | -- Entries associated with primitives covering interfaces |
8269 | -- are handled in a latter round. | |
aad6babd | 8270 | |
343d35dc | 8271 | Prim_Elmt := First_Prim; |
8272 | while Present (Prim_Elmt) loop | |
8273 | Prim := Node (Prim_Elmt); | |
aad6babd | 8274 | |
343d35dc | 8275 | -- Skip primitives previously set entries |
aad6babd | 8276 | |
343d35dc | 8277 | if DT_Position (Prim) /= No_Uint then |
8278 | null; | |
aad6babd | 8279 | |
343d35dc | 8280 | -- Primitives covering interface primitives are handled later |
aad6babd | 8281 | |
a652dd51 | 8282 | elsif Present (Interface_Alias (Prim)) then |
343d35dc | 8283 | null; |
aad6babd | 8284 | |
343d35dc | 8285 | else |
8286 | -- Take the next available position in the DT | |
aad6babd | 8287 | |
343d35dc | 8288 | loop |
8289 | Nb_Prim := Nb_Prim + 1; | |
8290 | pragma Assert (Nb_Prim <= Count_Prim); | |
8291 | exit when not Fixed_Prim (Nb_Prim); | |
8292 | end loop; | |
aad6babd | 8293 | |
343d35dc | 8294 | Set_DT_Position (Prim, UI_From_Int (Nb_Prim)); |
8295 | Set_Fixed_Prim (Nb_Prim); | |
8296 | end if; | |
aad6babd | 8297 | |
343d35dc | 8298 | Next_Elmt (Prim_Elmt); |
8299 | end loop; | |
8300 | end; | |
aad6babd | 8301 | |
343d35dc | 8302 | -- Fourth stage: Complete the decoration of primitives covering |
8303 | -- interfaces (that is, propagate the DT_Position attribute | |
8304 | -- from the aliased primitive) | |
aad6babd | 8305 | |
343d35dc | 8306 | Prim_Elmt := First_Prim; |
8307 | while Present (Prim_Elmt) loop | |
8308 | Prim := Node (Prim_Elmt); | |
aad6babd | 8309 | |
343d35dc | 8310 | if DT_Position (Prim) = No_Uint |
a652dd51 | 8311 | and then Present (Interface_Alias (Prim)) |
343d35dc | 8312 | then |
8313 | pragma Assert (Present (Alias (Prim)) | |
8314 | and then Find_Dispatching_Type (Alias (Prim)) = Typ); | |
aad6babd | 8315 | |
343d35dc | 8316 | -- Check if this entry will be placed in the primary DT |
aad6babd | 8317 | |
a652dd51 | 8318 | if Is_Ancestor |
cb4af01d | 8319 | (Find_Dispatching_Type (Interface_Alias (Prim)), Typ, |
8320 | Use_Full_View => True) | |
ee6ba406 | 8321 | then |
343d35dc | 8322 | pragma Assert (DT_Position (Alias (Prim)) /= No_Uint); |
8323 | Set_DT_Position (Prim, DT_Position (Alias (Prim))); | |
aad6babd | 8324 | |
343d35dc | 8325 | -- Otherwise it will be placed in the secondary DT |
aad6babd | 8326 | |
343d35dc | 8327 | else |
8328 | pragma Assert | |
a652dd51 | 8329 | (DT_Position (Interface_Alias (Prim)) /= No_Uint); |
343d35dc | 8330 | Set_DT_Position (Prim, |
a652dd51 | 8331 | DT_Position (Interface_Alias (Prim))); |
aad6babd | 8332 | end if; |
343d35dc | 8333 | end if; |
aad6babd | 8334 | |
343d35dc | 8335 | Next_Elmt (Prim_Elmt); |
8336 | end loop; | |
d62940bf | 8337 | |
343d35dc | 8338 | -- Generate listing showing the contents of the dispatch tables. |
8339 | -- This action is done before some further static checks because | |
8340 | -- in case of critical errors caused by a wrong dispatch table | |
8341 | -- we need to see the contents of such table. | |
d62940bf | 8342 | |
343d35dc | 8343 | if Debug_Flag_ZZ then |
8344 | Write_DT (Typ); | |
8345 | end if; | |
aad6babd | 8346 | |
343d35dc | 8347 | -- Final stage: Ensure that the table is correct plus some further |
8348 | -- verifications concerning the primitives. | |
aad6babd | 8349 | |
343d35dc | 8350 | Prim_Elmt := First_Prim; |
8351 | DT_Length := 0; | |
8352 | while Present (Prim_Elmt) loop | |
8353 | Prim := Node (Prim_Elmt); | |
aad6babd | 8354 | |
343d35dc | 8355 | -- At this point all the primitives MUST have a position |
acf97c11 | 8356 | -- in the dispatch table. |
aad6babd | 8357 | |
343d35dc | 8358 | if DT_Position (Prim) = No_Uint then |
8359 | raise Program_Error; | |
8360 | end if; | |
aad6babd | 8361 | |
343d35dc | 8362 | -- Calculate real size of the dispatch table |
aad6babd | 8363 | |
cf365b48 | 8364 | if not In_Predef_Prims_DT (Prim) |
343d35dc | 8365 | and then UI_To_Int (DT_Position (Prim)) > DT_Length |
8366 | then | |
8367 | DT_Length := UI_To_Int (DT_Position (Prim)); | |
8368 | end if; | |
aad6babd | 8369 | |
36b938a3 | 8370 | -- Ensure that the assigned position to non-predefined |
343d35dc | 8371 | -- dispatching operations in the dispatch table is correct. |
aad6babd | 8372 | |
cf365b48 | 8373 | if not Is_Predefined_Dispatching_Operation (Prim) |
8374 | and then not Is_Predefined_Dispatching_Alias (Prim) | |
343d35dc | 8375 | then |
8376 | Validate_Position (Prim); | |
8377 | end if; | |
ee6ba406 | 8378 | |
343d35dc | 8379 | if Chars (Prim) = Name_Finalize then |
8380 | Finalized := True; | |
8381 | end if; | |
ee6ba406 | 8382 | |
343d35dc | 8383 | if Chars (Prim) = Name_Adjust then |
8384 | Adjusted := True; | |
8385 | end if; | |
af647dc7 | 8386 | |
503f7fd3 | 8387 | -- An abstract operation cannot be declared in the private part for a |
8388 | -- visible abstract type, because it can't be overridden outside this | |
8389 | -- package hierarchy. For explicit declarations this is checked at | |
8390 | -- the point of declaration, but for inherited operations it must be | |
8391 | -- done when building the dispatch table. | |
343d35dc | 8392 | |
a652dd51 | 8393 | -- Ada 2005 (AI-251): Primitives associated with interfaces are |
8394 | -- excluded from this check because interfaces must be visible in | |
8395 | -- the public and private part (RM 7.3 (7.3/2)) | |
343d35dc | 8396 | |
a9cd517c | 8397 | -- We disable this check in Relaxed_RM_Semantics mode, to |
8398 | -- accommodate legacy Ada code. | |
6da4d289 | 8399 | |
a9cd517c | 8400 | if not Relaxed_RM_Semantics |
6da4d289 | 8401 | and then Is_Abstract_Type (Typ) |
343d35dc | 8402 | and then Is_Abstract_Subprogram (Prim) |
8403 | and then Present (Alias (Prim)) | |
a652dd51 | 8404 | and then not Is_Interface |
8405 | (Find_Dispatching_Type (Ultimate_Alias (Prim))) | |
8406 | and then not Present (Interface_Alias (Prim)) | |
343d35dc | 8407 | and then Is_Derived_Type (Typ) |
8408 | and then In_Private_Part (Current_Scope) | |
8409 | and then | |
8410 | List_Containing (Parent (Prim)) = | |
e8b4793a | 8411 | Private_Declarations (Package_Specification (Current_Scope)) |
343d35dc | 8412 | and then Original_View_In_Visible_Part (Typ) |
8413 | then | |
8414 | -- We exclude Input and Output stream operations because | |
8415 | -- Limited_Controlled inherits useless Input and Output | |
8416 | -- stream operations from Root_Controlled, which can | |
8417 | -- never be overridden. | |
ee6ba406 | 8418 | |
343d35dc | 8419 | if not Is_TSS (Prim, TSS_Stream_Input) |
8420 | and then | |
8421 | not Is_TSS (Prim, TSS_Stream_Output) | |
ee6ba406 | 8422 | then |
503f7fd3 | 8423 | Error_Msg_NE |
343d35dc | 8424 | ("abstract inherited private operation&" & |
17e14451 | 8425 | " must be overridden (RM 3.9.3(10))", |
343d35dc | 8426 | Parent (Typ), Prim); |
ee6ba406 | 8427 | end if; |
343d35dc | 8428 | end if; |
aad6babd | 8429 | |
343d35dc | 8430 | Next_Elmt (Prim_Elmt); |
8431 | end loop; | |
ee6ba406 | 8432 | |
343d35dc | 8433 | -- Additional check |
aad6babd | 8434 | |
343d35dc | 8435 | if Is_Controlled (Typ) then |
8436 | if not Finalized then | |
503f7fd3 | 8437 | Error_Msg_N |
cb97ae5c | 8438 | ("controlled type has no explicit Finalize method??", Typ); |
ee6ba406 | 8439 | |
343d35dc | 8440 | elsif not Adjusted then |
503f7fd3 | 8441 | Error_Msg_N |
cb97ae5c | 8442 | ("controlled type has no explicit Adjust method??", Typ); |
ee6ba406 | 8443 | end if; |
343d35dc | 8444 | end if; |
ee6ba406 | 8445 | |
343d35dc | 8446 | -- Set the final size of the Dispatch Table |
aad6babd | 8447 | |
343d35dc | 8448 | Set_DT_Entry_Count (The_Tag, UI_From_Int (DT_Length)); |
ee6ba406 | 8449 | |
725a69d2 | 8450 | -- The derived type must have at least as many components as its parent |
acf97c11 | 8451 | -- (for root types Etype points to itself and the test cannot fail). |
aad6babd | 8452 | |
725a69d2 | 8453 | if DT_Entry_Count (The_Tag) < |
8454 | DT_Entry_Count (First_Tag_Component (Parent_Typ)) | |
8455 | then | |
8456 | raise Program_Error; | |
aad6babd | 8457 | end if; |
ee6ba406 | 8458 | end Set_All_DT_Position; |
8459 | ||
294b942d | 8460 | -------------------------- |
8461 | -- Set_CPP_Constructors -- | |
8462 | -------------------------- | |
ee6ba406 | 8463 | |
294b942d | 8464 | procedure Set_CPP_Constructors (Typ : Entity_Id) is |
d00681a7 | 8465 | |
95773554 | 8466 | function Gen_Parameters_Profile (E : Entity_Id) return List_Id; |
8467 | -- Duplicate the parameters profile of the imported C++ constructor | |
8468 | -- adding an access to the object as an additional parameter. | |
d00681a7 | 8469 | |
95773554 | 8470 | function Gen_Parameters_Profile (E : Entity_Id) return List_Id is |
8471 | Loc : constant Source_Ptr := Sloc (E); | |
8472 | Parms : List_Id; | |
8473 | P : Node_Id; | |
b8a17a21 | 8474 | |
d00681a7 | 8475 | begin |
95773554 | 8476 | Parms := |
8477 | New_List ( | |
8478 | Make_Parameter_Specification (Loc, | |
8479 | Defining_Identifier => | |
8480 | Make_Defining_Identifier (Loc, Name_uInit), | |
83c6c069 | 8481 | Parameter_Type => New_Occurrence_Of (Typ, Loc))); |
95773554 | 8482 | |
8483 | if Present (Parameter_Specifications (Parent (E))) then | |
8484 | P := First (Parameter_Specifications (Parent (E))); | |
8485 | while Present (P) loop | |
8486 | Append_To (Parms, | |
8487 | Make_Parameter_Specification (Loc, | |
8488 | Defining_Identifier => | |
8489 | Make_Defining_Identifier (Loc, | |
8490 | Chars => Chars (Defining_Identifier (P))), | |
8491 | Parameter_Type => New_Copy_Tree (Parameter_Type (P)), | |
8492 | Expression => New_Copy_Tree (Expression (P)))); | |
8493 | Next (P); | |
8494 | end loop; | |
d00681a7 | 8495 | end if; |
b8a17a21 | 8496 | |
95773554 | 8497 | return Parms; |
8498 | end Gen_Parameters_Profile; | |
d00681a7 | 8499 | |
8500 | -- Local variables | |
8501 | ||
95773554 | 8502 | Loc : Source_Ptr; |
8503 | E : Entity_Id; | |
8504 | Found : Boolean := False; | |
8505 | IP : Entity_Id; | |
8506 | IP_Body : Node_Id; | |
8507 | P : Node_Id; | |
8508 | Parms : List_Id; | |
d00681a7 | 8509 | |
c1b63034 | 8510 | Covers_Default_Constructor : Entity_Id := Empty; |
8511 | ||
8512 | -- Start of processing for Set_CPP_Constructor | |
8513 | ||
ee6ba406 | 8514 | begin |
d00681a7 | 8515 | pragma Assert (Is_CPP_Class (Typ)); |
8516 | ||
294b942d | 8517 | -- Look for the constructor entities |
ee6ba406 | 8518 | |
8519 | E := Next_Entity (Typ); | |
294b942d | 8520 | while Present (E) loop |
8521 | if Ekind (E) = E_Function | |
8522 | and then Is_Constructor (E) | |
8523 | then | |
294b942d | 8524 | Found := True; |
8525 | Loc := Sloc (E); | |
95773554 | 8526 | Parms := Gen_Parameters_Profile (E); |
8527 | IP := | |
8528 | Make_Defining_Identifier (Loc, | |
8529 | Chars => Make_Init_Proc_Name (Typ)); | |
8530 | ||
8531 | -- Case 1: Constructor of non-tagged type | |
8532 | ||
8533 | -- If the C++ class has no virtual methods then the matching Ada | |
8534 | -- type is a non-tagged record type. In such case there is no need | |
8535 | -- to generate a wrapper of the C++ constructor because the _tag | |
8536 | -- component is not available. | |
8537 | ||
8538 | if not Is_Tagged_Type (Typ) then | |
8539 | Discard_Node | |
8540 | (Make_Subprogram_Declaration (Loc, | |
8541 | Specification => | |
8542 | Make_Procedure_Specification (Loc, | |
8543 | Defining_Unit_Name => IP, | |
8544 | Parameter_Specifications => Parms))); | |
8545 | ||
8546 | Set_Init_Proc (Typ, IP); | |
8547 | Set_Is_Imported (IP); | |
8548 | Set_Is_Constructor (IP); | |
8549 | Set_Interface_Name (IP, Interface_Name (E)); | |
8550 | Set_Convention (IP, Convention_CPP); | |
8551 | Set_Is_Public (IP); | |
8552 | Set_Has_Completion (IP); | |
8553 | ||
8554 | -- Case 2: Constructor of a tagged type | |
8555 | ||
8556 | -- In this case we generate the IP as a wrapper of the the | |
8557 | -- C++ constructor because IP must also save copy of the _tag | |
8558 | -- generated in the C++ side. The copy of the _tag is used by | |
8559 | -- Build_CPP_Init_Procedure to elaborate derivations of C++ types. | |
d00681a7 | 8560 | |
95773554 | 8561 | -- Generate: |
8562 | -- procedure IP (_init : Typ; ...) is | |
8563 | -- procedure ConstructorP (_init : Typ; ...); | |
8564 | -- pragma Import (ConstructorP); | |
8565 | -- begin | |
8566 | -- ConstructorP (_init, ...); | |
8567 | -- if Typ._tag = null then | |
8568 | -- Typ._tag := _init._tag; | |
8569 | -- end if; | |
8570 | -- end IP; | |
d00681a7 | 8571 | |
95773554 | 8572 | else |
8573 | declare | |
8574 | Body_Stmts : constant List_Id := New_List; | |
8575 | Constructor_Id : Entity_Id; | |
8576 | Constructor_Decl_Node : Node_Id; | |
8577 | Init_Tags_List : List_Id; | |
d00681a7 | 8578 | |
95773554 | 8579 | begin |
8580 | Constructor_Id := Make_Temporary (Loc, 'P'); | |
d00681a7 | 8581 | |
95773554 | 8582 | Constructor_Decl_Node := |
8583 | Make_Subprogram_Declaration (Loc, | |
8584 | Make_Procedure_Specification (Loc, | |
8585 | Defining_Unit_Name => Constructor_Id, | |
8586 | Parameter_Specifications => Parms)); | |
d00681a7 | 8587 | |
95773554 | 8588 | Set_Is_Imported (Constructor_Id); |
8589 | Set_Is_Constructor (Constructor_Id); | |
8590 | Set_Interface_Name (Constructor_Id, Interface_Name (E)); | |
8591 | Set_Convention (Constructor_Id, Convention_CPP); | |
8592 | Set_Is_Public (Constructor_Id); | |
8593 | Set_Has_Completion (Constructor_Id); | |
d00681a7 | 8594 | |
95773554 | 8595 | -- Build the init procedure as a wrapper of this constructor |
d00681a7 | 8596 | |
95773554 | 8597 | Parms := Gen_Parameters_Profile (E); |
d00681a7 | 8598 | |
95773554 | 8599 | -- Invoke the C++ constructor |
d00681a7 | 8600 | |
95773554 | 8601 | declare |
8602 | Actuals : constant List_Id := New_List; | |
d00681a7 | 8603 | |
95773554 | 8604 | begin |
8605 | P := First (Parms); | |
8606 | while Present (P) loop | |
8607 | Append_To (Actuals, | |
83c6c069 | 8608 | New_Occurrence_Of (Defining_Identifier (P), Loc)); |
95773554 | 8609 | Next (P); |
8610 | end loop; | |
d00681a7 | 8611 | |
95773554 | 8612 | Append_To (Body_Stmts, |
8613 | Make_Procedure_Call_Statement (Loc, | |
83c6c069 | 8614 | Name => New_Occurrence_Of (Constructor_Id, Loc), |
95773554 | 8615 | Parameter_Associations => Actuals)); |
8616 | end; | |
d00681a7 | 8617 | |
95773554 | 8618 | -- Initialize copies of C++ primary and secondary tags |
d00681a7 | 8619 | |
95773554 | 8620 | Init_Tags_List := New_List; |
d00681a7 | 8621 | |
95773554 | 8622 | declare |
8623 | Tag_Elmt : Elmt_Id; | |
8624 | Tag_Comp : Node_Id; | |
d00681a7 | 8625 | |
95773554 | 8626 | begin |
8627 | Tag_Elmt := First_Elmt (Access_Disp_Table (Typ)); | |
8628 | Tag_Comp := First_Tag_Component (Typ); | |
d00681a7 | 8629 | |
95773554 | 8630 | while Present (Tag_Elmt) |
8631 | and then Is_Tag (Node (Tag_Elmt)) | |
8632 | loop | |
8633 | -- Skip the following assertion with primary tags | |
8634 | -- because Related_Type is not set on primary tag | |
8635 | -- components | |
8636 | ||
8637 | pragma Assert | |
8638 | (Tag_Comp = First_Tag_Component (Typ) | |
8639 | or else Related_Type (Node (Tag_Elmt)) | |
8640 | = Related_Type (Tag_Comp)); | |
8641 | ||
8642 | Append_To (Init_Tags_List, | |
8643 | Make_Assignment_Statement (Loc, | |
8644 | Name => | |
83c6c069 | 8645 | New_Occurrence_Of (Node (Tag_Elmt), Loc), |
95773554 | 8646 | Expression => |
8647 | Make_Selected_Component (Loc, | |
8648 | Prefix => | |
8649 | Make_Identifier (Loc, Name_uInit), | |
8650 | Selector_Name => | |
83c6c069 | 8651 | New_Occurrence_Of (Tag_Comp, Loc)))); |
d00681a7 | 8652 | |
95773554 | 8653 | Tag_Comp := Next_Tag_Component (Tag_Comp); |
8654 | Next_Elmt (Tag_Elmt); | |
8655 | end loop; | |
8656 | end; | |
d00681a7 | 8657 | |
95773554 | 8658 | Append_To (Body_Stmts, |
8659 | Make_If_Statement (Loc, | |
8660 | Condition => | |
8661 | Make_Op_Eq (Loc, | |
8662 | Left_Opnd => | |
83c6c069 | 8663 | New_Occurrence_Of |
95773554 | 8664 | (Node (First_Elmt (Access_Disp_Table (Typ))), |
8665 | Loc), | |
8666 | Right_Opnd => | |
8667 | Unchecked_Convert_To (RTE (RE_Tag), | |
83c6c069 | 8668 | New_Occurrence_Of (RTE (RE_Null_Address), Loc))), |
95773554 | 8669 | Then_Statements => Init_Tags_List)); |
8670 | ||
8671 | IP_Body := | |
8672 | Make_Subprogram_Body (Loc, | |
8673 | Specification => | |
8674 | Make_Procedure_Specification (Loc, | |
8675 | Defining_Unit_Name => IP, | |
8676 | Parameter_Specifications => Parms), | |
8677 | Declarations => New_List (Constructor_Decl_Node), | |
8678 | Handled_Statement_Sequence => | |
8679 | Make_Handled_Sequence_Of_Statements (Loc, | |
8680 | Statements => Body_Stmts, | |
8681 | Exception_Handlers => No_List)); | |
8682 | ||
8683 | Discard_Node (IP_Body); | |
8684 | Set_Init_Proc (Typ, IP); | |
8685 | end; | |
8686 | end if; | |
c1b63034 | 8687 | |
8688 | -- If this constructor has parameters and all its parameters | |
8689 | -- have defaults then it covers the default constructor. The | |
8690 | -- semantic analyzer ensures that only one constructor with | |
8691 | -- defaults covers the default constructor. | |
8692 | ||
8693 | if Present (Parameter_Specifications (Parent (E))) | |
8694 | and then Needs_No_Actuals (E) | |
8695 | then | |
95773554 | 8696 | Covers_Default_Constructor := IP; |
c1b63034 | 8697 | end if; |
294b942d | 8698 | end if; |
8699 | ||
ee6ba406 | 8700 | Next_Entity (E); |
8701 | end loop; | |
8702 | ||
9dfe12ae | 8703 | -- If there are no constructors, mark the type as abstract since we |
ee6ba406 | 8704 | -- won't be able to declare objects of that type. |
8705 | ||
294b942d | 8706 | if not Found then |
343d35dc | 8707 | Set_Is_Abstract_Type (Typ); |
ee6ba406 | 8708 | end if; |
d00681a7 | 8709 | |
c1b63034 | 8710 | -- Handle constructor that has all its parameters with defaults and |
8711 | -- hence it covers the default constructor. We generate a wrapper IP | |
8712 | -- which calls the covering constructor. | |
8713 | ||
8714 | if Present (Covers_Default_Constructor) then | |
95773554 | 8715 | declare |
8716 | Body_Stmts : List_Id; | |
c1b63034 | 8717 | |
95773554 | 8718 | begin |
8719 | Loc := Sloc (Covers_Default_Constructor); | |
c1b63034 | 8720 | |
95773554 | 8721 | Body_Stmts := New_List ( |
8722 | Make_Procedure_Call_Statement (Loc, | |
8723 | Name => | |
83c6c069 | 8724 | New_Occurrence_Of (Covers_Default_Constructor, Loc), |
95773554 | 8725 | Parameter_Associations => New_List ( |
8726 | Make_Identifier (Loc, Name_uInit)))); | |
c1b63034 | 8727 | |
95773554 | 8728 | IP := Make_Defining_Identifier (Loc, Make_Init_Proc_Name (Typ)); |
c1b63034 | 8729 | |
95773554 | 8730 | IP_Body := |
8731 | Make_Subprogram_Body (Loc, | |
8732 | Specification => | |
8733 | Make_Procedure_Specification (Loc, | |
8734 | Defining_Unit_Name => IP, | |
8735 | Parameter_Specifications => New_List ( | |
8736 | Make_Parameter_Specification (Loc, | |
8737 | Defining_Identifier => | |
8738 | Make_Defining_Identifier (Loc, Name_uInit), | |
83c6c069 | 8739 | Parameter_Type => New_Occurrence_Of (Typ, Loc)))), |
c1b63034 | 8740 | |
95773554 | 8741 | Declarations => No_List, |
8742 | ||
8743 | Handled_Statement_Sequence => | |
8744 | Make_Handled_Sequence_Of_Statements (Loc, | |
8745 | Statements => Body_Stmts, | |
8746 | Exception_Handlers => No_List)); | |
8747 | ||
8748 | Discard_Node (IP_Body); | |
8749 | Set_Init_Proc (Typ, IP); | |
8750 | end; | |
c1b63034 | 8751 | end if; |
8752 | ||
d00681a7 | 8753 | -- If the CPP type has constructors then it must import also the default |
8754 | -- C++ constructor. It is required for default initialization of objects | |
8755 | -- of the type. It is also required to elaborate objects of Ada types | |
8756 | -- that are defined as derivations of this CPP type. | |
8757 | ||
8758 | if Has_CPP_Constructors (Typ) | |
8759 | and then No (Init_Proc (Typ)) | |
8760 | then | |
cb97ae5c | 8761 | Error_Msg_N ("??default constructor must be imported from C++", Typ); |
d00681a7 | 8762 | end if; |
294b942d | 8763 | end Set_CPP_Constructors; |
ee6ba406 | 8764 | |
725a69d2 | 8765 | -------------------------- |
8766 | -- Set_DTC_Entity_Value -- | |
8767 | -------------------------- | |
8768 | ||
8769 | procedure Set_DTC_Entity_Value | |
8770 | (Tagged_Type : Entity_Id; | |
8771 | Prim : Entity_Id) | |
8772 | is | |
8773 | begin | |
a652dd51 | 8774 | if Present (Interface_Alias (Prim)) |
725a69d2 | 8775 | and then Is_Interface |
a652dd51 | 8776 | (Find_Dispatching_Type (Interface_Alias (Prim))) |
725a69d2 | 8777 | then |
8778 | Set_DTC_Entity (Prim, | |
8779 | Find_Interface_Tag | |
8780 | (T => Tagged_Type, | |
a652dd51 | 8781 | Iface => Find_Dispatching_Type (Interface_Alias (Prim)))); |
725a69d2 | 8782 | else |
8783 | Set_DTC_Entity (Prim, | |
8784 | First_Tag_Component (Tagged_Type)); | |
8785 | end if; | |
8786 | end Set_DTC_Entity_Value; | |
8787 | ||
952af0b9 | 8788 | ----------------- |
8789 | -- Tagged_Kind -- | |
8790 | ----------------- | |
8791 | ||
8792 | function Tagged_Kind (T : Entity_Id) return Node_Id is | |
8793 | Conc_Typ : Entity_Id; | |
8794 | Loc : constant Source_Ptr := Sloc (T); | |
8795 | ||
8796 | begin | |
68f95949 | 8797 | pragma Assert |
8798 | (Is_Tagged_Type (T) and then RTE_Available (RE_Tagged_Kind)); | |
952af0b9 | 8799 | |
8800 | -- Abstract kinds | |
8801 | ||
343d35dc | 8802 | if Is_Abstract_Type (T) then |
952af0b9 | 8803 | if Is_Limited_Record (T) then |
83c6c069 | 8804 | return New_Occurrence_Of |
8805 | (RTE (RE_TK_Abstract_Limited_Tagged), Loc); | |
952af0b9 | 8806 | else |
83c6c069 | 8807 | return New_Occurrence_Of |
8808 | (RTE (RE_TK_Abstract_Tagged), Loc); | |
952af0b9 | 8809 | end if; |
8810 | ||
8811 | -- Concurrent kinds | |
8812 | ||
8813 | elsif Is_Concurrent_Record_Type (T) then | |
8814 | Conc_Typ := Corresponding_Concurrent_Type (T); | |
8815 | ||
17e14451 | 8816 | if Present (Full_View (Conc_Typ)) then |
8817 | Conc_Typ := Full_View (Conc_Typ); | |
8818 | end if; | |
8819 | ||
952af0b9 | 8820 | if Ekind (Conc_Typ) = E_Protected_Type then |
83c6c069 | 8821 | return New_Occurrence_Of (RTE (RE_TK_Protected), Loc); |
952af0b9 | 8822 | else |
8823 | pragma Assert (Ekind (Conc_Typ) = E_Task_Type); | |
83c6c069 | 8824 | return New_Occurrence_Of (RTE (RE_TK_Task), Loc); |
952af0b9 | 8825 | end if; |
8826 | ||
8827 | -- Regular tagged kinds | |
8828 | ||
8829 | else | |
8830 | if Is_Limited_Record (T) then | |
83c6c069 | 8831 | return New_Occurrence_Of (RTE (RE_TK_Limited_Tagged), Loc); |
952af0b9 | 8832 | else |
83c6c069 | 8833 | return New_Occurrence_Of (RTE (RE_TK_Tagged), Loc); |
952af0b9 | 8834 | end if; |
8835 | end if; | |
8836 | end Tagged_Kind; | |
8837 | ||
aad6babd | 8838 | -------------- |
8839 | -- Write_DT -- | |
8840 | -------------- | |
8841 | ||
8842 | procedure Write_DT (Typ : Entity_Id) is | |
8843 | Elmt : Elmt_Id; | |
8844 | Prim : Node_Id; | |
8845 | ||
8846 | begin | |
8847 | -- Protect this procedure against wrong usage. Required because it will | |
8848 | -- be used directly from GDB | |
8849 | ||
17e14451 | 8850 | if not (Typ <= Last_Node_Id) |
aad6babd | 8851 | or else not Is_Tagged_Type (Typ) |
8852 | then | |
d62940bf | 8853 | Write_Str ("wrong usage: Write_DT must be used with tagged types"); |
aad6babd | 8854 | Write_Eol; |
8855 | return; | |
8856 | end if; | |
8857 | ||
8858 | Write_Int (Int (Typ)); | |
8859 | Write_Str (": "); | |
8860 | Write_Name (Chars (Typ)); | |
8861 | ||
8862 | if Is_Interface (Typ) then | |
8863 | Write_Str (" is interface"); | |
8864 | end if; | |
8865 | ||
8866 | Write_Eol; | |
8867 | ||
8868 | Elmt := First_Elmt (Primitive_Operations (Typ)); | |
8869 | while Present (Elmt) loop | |
8870 | Prim := Node (Elmt); | |
8871 | Write_Str (" - "); | |
8872 | ||
8873 | -- Indicate if this primitive will be allocated in the primary | |
8874 | -- dispatch table or in a secondary dispatch table associated | |
8875 | -- with an abstract interface type | |
8876 | ||
8877 | if Present (DTC_Entity (Prim)) then | |
8878 | if Etype (DTC_Entity (Prim)) = RTE (RE_Tag) then | |
8879 | Write_Str ("[P] "); | |
8880 | else | |
8881 | Write_Str ("[s] "); | |
8882 | end if; | |
8883 | end if; | |
8884 | ||
8885 | -- Output the node of this primitive operation and its name | |
8886 | ||
8887 | Write_Int (Int (Prim)); | |
8888 | Write_Str (": "); | |
68f95949 | 8889 | |
8890 | if Is_Predefined_Dispatching_Operation (Prim) then | |
8891 | Write_Str ("(predefined) "); | |
8892 | end if; | |
8893 | ||
b381b314 | 8894 | -- Prefix the name of the primitive with its corresponding tagged |
8895 | -- type to facilitate seeing inherited primitives. | |
8896 | ||
8897 | if Present (Alias (Prim)) then | |
8898 | Write_Name | |
8899 | (Chars (Find_Dispatching_Type (Ultimate_Alias (Prim)))); | |
8900 | else | |
8901 | Write_Name (Chars (Typ)); | |
8902 | end if; | |
8903 | ||
8904 | Write_Str ("."); | |
aad6babd | 8905 | Write_Name (Chars (Prim)); |
8906 | ||
8907 | -- Indicate if this primitive has an aliased primitive | |
8908 | ||
8909 | if Present (Alias (Prim)) then | |
8910 | Write_Str (" (alias = "); | |
8911 | Write_Int (Int (Alias (Prim))); | |
8912 | ||
8913 | -- If the DTC_Entity attribute is already set we can also output | |
4c58ddd7 | 8914 | -- the name of the interface covered by this primitive (if any). |
aad6babd | 8915 | |
f117057b | 8916 | if Ekind_In (Alias (Prim), E_Function, E_Procedure) |
8917 | and then Present (DTC_Entity (Alias (Prim))) | |
aad6babd | 8918 | and then Is_Interface (Scope (DTC_Entity (Alias (Prim)))) |
8919 | then | |
8920 | Write_Str (" from interface "); | |
8921 | Write_Name (Chars (Scope (DTC_Entity (Alias (Prim))))); | |
8922 | end if; | |
8923 | ||
a652dd51 | 8924 | if Present (Interface_Alias (Prim)) then |
aad6babd | 8925 | Write_Str (", AI_Alias of "); |
f235fede | 8926 | |
8927 | if Is_Null_Interface_Primitive (Interface_Alias (Prim)) then | |
8928 | Write_Str ("null primitive "); | |
8929 | end if; | |
8930 | ||
a652dd51 | 8931 | Write_Name |
8932 | (Chars (Find_Dispatching_Type (Interface_Alias (Prim)))); | |
aad6babd | 8933 | Write_Char (':'); |
a652dd51 | 8934 | Write_Int (Int (Interface_Alias (Prim))); |
aad6babd | 8935 | end if; |
8936 | ||
8937 | Write_Str (")"); | |
8938 | end if; | |
8939 | ||
8940 | -- Display the final position of this primitive in its associated | |
8941 | -- (primary or secondary) dispatch table | |
8942 | ||
8943 | if Present (DTC_Entity (Prim)) | |
8944 | and then DT_Position (Prim) /= No_Uint | |
8945 | then | |
8946 | Write_Str (" at #"); | |
8947 | Write_Int (UI_To_Int (DT_Position (Prim))); | |
8948 | end if; | |
8949 | ||
343d35dc | 8950 | if Is_Abstract_Subprogram (Prim) then |
aad6babd | 8951 | Write_Str (" is abstract;"); |
af647dc7 | 8952 | |
8953 | -- Check if this is a null primitive | |
8954 | ||
8955 | elsif Comes_From_Source (Prim) | |
8956 | and then Ekind (Prim) = E_Procedure | |
8957 | and then Null_Present (Parent (Prim)) | |
8958 | then | |
8959 | Write_Str (" is null;"); | |
aad6babd | 8960 | end if; |
8961 | ||
555c63a6 | 8962 | if Is_Eliminated (Ultimate_Alias (Prim)) then |
8963 | Write_Str (" (eliminated)"); | |
8964 | end if; | |
8965 | ||
d00681a7 | 8966 | if Is_Imported (Prim) |
8967 | and then Convention (Prim) = Convention_CPP | |
8968 | then | |
8969 | Write_Str (" (C++)"); | |
8970 | end if; | |
8971 | ||
aad6babd | 8972 | Write_Eol; |
8973 | ||
8974 | Next_Elmt (Elmt); | |
8975 | end loop; | |
8976 | end Write_DT; | |
8977 | ||
ee6ba406 | 8978 | end Exp_Disp; |