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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 | -- -- | |
ad274a73 | 9 | -- Copyright (C) 1992-2015, 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; |
360b005f | 39 | with Ghost; use Ghost; |
ee6ba406 | 40 | with Itypes; use Itypes; |
b6b96867 | 41 | with Layout; use Layout; |
ee6ba406 | 42 | with Nlists; use Nlists; |
43 | with Nmake; use Nmake; | |
aad6babd | 44 | with Namet; use Namet; |
ee6ba406 | 45 | with Opt; use Opt; |
aad6babd | 46 | with Output; use Output; |
68f95949 | 47 | with Restrict; use Restrict; |
48 | with Rident; use Rident; | |
ee6ba406 | 49 | with Rtsfind; use Rtsfind; |
aad6babd | 50 | with Sem; use Sem; |
d60c9ff7 | 51 | with Sem_Aux; use Sem_Aux; |
725a69d2 | 52 | with Sem_Ch6; use Sem_Ch6; |
acf97c11 | 53 | with Sem_Ch7; use Sem_Ch7; |
725a69d2 | 54 | with Sem_Ch8; use Sem_Ch8; |
ee6ba406 | 55 | with Sem_Disp; use Sem_Disp; |
725a69d2 | 56 | with Sem_Eval; use Sem_Eval; |
ee6ba406 | 57 | with Sem_Res; use Sem_Res; |
aad6babd | 58 | with Sem_Type; use Sem_Type; |
ee6ba406 | 59 | with Sem_Util; use Sem_Util; |
60 | with Sinfo; use Sinfo; | |
61 | with Snames; use Snames; | |
62 | with Stand; use Stand; | |
725a69d2 | 63 | with Stringt; use Stringt; |
5a44b136 | 64 | with SCIL_LL; use SCIL_LL; |
79500ea0 | 65 | with Targparm; use Targparm; |
ee6ba406 | 66 | with Tbuild; use Tbuild; |
ee6ba406 | 67 | |
68 | package body Exp_Disp is | |
69 | ||
725a69d2 | 70 | ----------------------- |
71 | -- Local Subprograms -- | |
72 | ----------------------- | |
ee6ba406 | 73 | |
68f95949 | 74 | function Default_Prim_Op_Position (E : Entity_Id) return Uint; |
aad6babd | 75 | -- Ada 2005 (AI-251): Returns the fixed position in the dispatch table |
76 | -- of the default primitive operations. | |
77 | ||
24971415 | 78 | function Has_DT (Typ : Entity_Id) return Boolean; |
79 | pragma Inline (Has_DT); | |
80 | -- Returns true if we generate a dispatch table for tagged type Typ | |
81 | ||
af647dc7 | 82 | function Is_Predefined_Dispatching_Alias (Prim : Entity_Id) return Boolean; |
83 | -- Returns true if Prim is not a predefined dispatching primitive but it is | |
36b938a3 | 84 | -- an alias of a predefined dispatching primitive (i.e. through a renaming) |
af647dc7 | 85 | |
cd534f03 | 86 | function New_Value (From : Node_Id) return Node_Id; |
02a2406d | 87 | -- From is the original Expression. New_Value is equivalent to a call to |
88 | -- Duplicate_Subexpr with an explicit dereference when From is an access | |
89 | -- parameter. | |
cd534f03 | 90 | |
ee6ba406 | 91 | function Original_View_In_Visible_Part (Typ : Entity_Id) return Boolean; |
02a2406d | 92 | -- Check if the type has a private view or if the public view appears in |
93 | -- the visible part of a package spec. | |
ee6ba406 | 94 | |
d62940bf | 95 | function Prim_Op_Kind |
96 | (Prim : Entity_Id; | |
97 | Typ : Entity_Id) return Node_Id; | |
98 | -- Ada 2005 (AI-345): Determine the primitive operation kind of Prim | |
952af0b9 | 99 | -- according to its type Typ. Return a reference to an RE_Prim_Op_Kind |
d62940bf | 100 | -- enumeration value. |
aad6babd | 101 | |
952af0b9 | 102 | function Tagged_Kind (T : Entity_Id) return Node_Id; |
103 | -- Ada 2005 (AI-345): Determine the tagged kind of T and return a reference | |
104 | -- to an RE_Tagged_Kind enumeration value. | |
105 | ||
cd534f03 | 106 | ---------------------- |
107 | -- Apply_Tag_Checks -- | |
108 | ---------------------- | |
109 | ||
110 | procedure Apply_Tag_Checks (Call_Node : Node_Id) is | |
111 | Loc : constant Source_Ptr := Sloc (Call_Node); | |
112 | Ctrl_Arg : constant Node_Id := Controlling_Argument (Call_Node); | |
113 | Ctrl_Typ : constant Entity_Id := Base_Type (Etype (Ctrl_Arg)); | |
114 | Param_List : constant List_Id := Parameter_Associations (Call_Node); | |
115 | ||
116 | Subp : Entity_Id; | |
117 | CW_Typ : Entity_Id; | |
118 | Param : Node_Id; | |
119 | Typ : Entity_Id; | |
120 | Eq_Prim_Op : Entity_Id := Empty; | |
121 | ||
122 | begin | |
123 | if No_Run_Time_Mode then | |
124 | Error_Msg_CRT ("tagged types", Call_Node); | |
125 | return; | |
126 | end if; | |
127 | ||
02a2406d | 128 | -- Apply_Tag_Checks is called directly from the semantics, so we |
129 | -- need a check to see whether expansion is active before proceeding. | |
130 | -- In addition, there is no need to expand the call when compiling | |
131 | -- under restriction No_Dispatching_Calls; the semantic analyzer has | |
cd534f03 | 132 | -- previously notified the violation of this restriction. |
133 | ||
134 | if not Expander_Active | |
135 | or else Restriction_Active (No_Dispatching_Calls) | |
136 | then | |
137 | return; | |
138 | end if; | |
139 | ||
140 | -- Set subprogram. If this is an inherited operation that was | |
141 | -- overridden, the body that is being called is its alias. | |
142 | ||
143 | Subp := Entity (Name (Call_Node)); | |
144 | ||
145 | if Present (Alias (Subp)) | |
146 | and then Is_Inherited_Operation (Subp) | |
147 | and then No (DTC_Entity (Subp)) | |
148 | then | |
149 | Subp := Alias (Subp); | |
150 | end if; | |
151 | ||
152 | -- Definition of the class-wide type and the tagged type | |
153 | ||
154 | -- If the controlling argument is itself a tag rather than a tagged | |
155 | -- object, then use the class-wide type associated with the subprogram's | |
156 | -- controlling type. This case can occur when a call to an inherited | |
157 | -- primitive has an actual that originated from a default parameter | |
158 | -- given by a tag-indeterminate call and when there is no other | |
159 | -- controlling argument providing the tag (AI-239 requires dispatching). | |
160 | -- This capability of dispatching directly by tag is also needed by the | |
161 | -- implementation of AI-260 (for the generic dispatching constructors). | |
162 | ||
163 | if Ctrl_Typ = RTE (RE_Tag) | |
164 | or else (RTE_Available (RE_Interface_Tag) | |
165 | and then Ctrl_Typ = RTE (RE_Interface_Tag)) | |
166 | then | |
167 | CW_Typ := Class_Wide_Type (Find_Dispatching_Type (Subp)); | |
168 | ||
169 | -- Class_Wide_Type is applied to the expressions used to initialize | |
170 | -- CW_Typ, to ensure that CW_Typ always denotes a class-wide type, since | |
171 | -- there are cases where the controlling type is resolved to a specific | |
172 | -- type (such as for designated types of arguments such as CW'Access). | |
173 | ||
174 | elsif Is_Access_Type (Ctrl_Typ) then | |
175 | CW_Typ := Class_Wide_Type (Designated_Type (Ctrl_Typ)); | |
176 | ||
177 | else | |
178 | CW_Typ := Class_Wide_Type (Ctrl_Typ); | |
179 | end if; | |
180 | ||
bb5dfacc | 181 | Typ := Find_Specific_Type (CW_Typ); |
cd534f03 | 182 | |
183 | if not Is_Limited_Type (Typ) then | |
184 | Eq_Prim_Op := Find_Prim_Op (Typ, Name_Op_Eq); | |
185 | end if; | |
186 | ||
187 | -- Dispatching call to C++ primitive | |
188 | ||
189 | if Is_CPP_Class (Typ) then | |
190 | null; | |
191 | ||
192 | -- Dispatching call to Ada primitive | |
193 | ||
194 | elsif Present (Param_List) then | |
195 | ||
196 | -- Generate the Tag checks when appropriate | |
197 | ||
198 | Param := First_Actual (Call_Node); | |
199 | while Present (Param) loop | |
200 | ||
201 | -- No tag check with itself | |
202 | ||
203 | if Param = Ctrl_Arg then | |
204 | null; | |
205 | ||
206 | -- No tag check for parameter whose type is neither tagged nor | |
207 | -- access to tagged (for access parameters) | |
208 | ||
209 | elsif No (Find_Controlling_Arg (Param)) then | |
210 | null; | |
211 | ||
212 | -- No tag check for function dispatching on result if the | |
213 | -- Tag given by the context is this one | |
214 | ||
215 | elsif Find_Controlling_Arg (Param) = Ctrl_Arg then | |
216 | null; | |
217 | ||
02a2406d | 218 | -- "=" is the only dispatching operation allowed to get operands |
219 | -- with incompatible tags (it just returns false). We use | |
220 | -- Duplicate_Subexpr_Move_Checks instead of calling Relocate_Node | |
221 | -- because the value will be duplicated to check the tags. | |
cd534f03 | 222 | |
223 | elsif Subp = Eq_Prim_Op then | |
224 | null; | |
225 | ||
226 | -- No check in presence of suppress flags | |
227 | ||
228 | elsif Tag_Checks_Suppressed (Etype (Param)) | |
229 | or else (Is_Access_Type (Etype (Param)) | |
230 | and then Tag_Checks_Suppressed | |
231 | (Designated_Type (Etype (Param)))) | |
232 | then | |
233 | null; | |
234 | ||
235 | -- Optimization: no tag checks if the parameters are identical | |
236 | ||
237 | elsif Is_Entity_Name (Param) | |
238 | and then Is_Entity_Name (Ctrl_Arg) | |
239 | and then Entity (Param) = Entity (Ctrl_Arg) | |
240 | then | |
241 | null; | |
242 | ||
243 | -- Now we need to generate the Tag check | |
244 | ||
245 | else | |
246 | -- Generate code for tag equality check | |
02a2406d | 247 | |
cd534f03 | 248 | -- Perhaps should have Checks.Apply_Tag_Equality_Check??? |
249 | ||
250 | Insert_Action (Ctrl_Arg, | |
251 | Make_Implicit_If_Statement (Call_Node, | |
252 | Condition => | |
253 | Make_Op_Ne (Loc, | |
254 | Left_Opnd => | |
255 | Make_Selected_Component (Loc, | |
256 | Prefix => New_Value (Ctrl_Arg), | |
257 | Selector_Name => | |
83c6c069 | 258 | New_Occurrence_Of |
cd534f03 | 259 | (First_Tag_Component (Typ), Loc)), |
260 | ||
261 | Right_Opnd => | |
262 | Make_Selected_Component (Loc, | |
263 | Prefix => | |
264 | Unchecked_Convert_To (Typ, New_Value (Param)), | |
265 | Selector_Name => | |
83c6c069 | 266 | New_Occurrence_Of |
cd534f03 | 267 | (First_Tag_Component (Typ), Loc))), |
268 | ||
269 | Then_Statements => | |
270 | New_List (New_Constraint_Error (Loc)))); | |
271 | end if; | |
272 | ||
273 | Next_Actual (Param); | |
274 | end loop; | |
275 | end if; | |
276 | end Apply_Tag_Checks; | |
277 | ||
24971415 | 278 | ------------------------ |
279 | -- Building_Static_DT -- | |
280 | ------------------------ | |
281 | ||
282 | function Building_Static_DT (Typ : Entity_Id) return Boolean is | |
cc60bd16 | 283 | Root_Typ : Entity_Id := Root_Type (Typ); |
284 | ||
24971415 | 285 | begin |
cc60bd16 | 286 | -- Handle private types |
287 | ||
288 | if Present (Full_View (Root_Typ)) then | |
289 | Root_Typ := Full_View (Root_Typ); | |
290 | end if; | |
291 | ||
24971415 | 292 | return Static_Dispatch_Tables |
e7e688dd | 293 | and then Is_Library_Level_Tagged_Type (Typ) |
79500ea0 | 294 | and then VM_Target = No_VM |
e7e688dd | 295 | |
296 | -- If the type is derived from a CPP class we cannot statically | |
297 | -- build the dispatch tables because we must inherit primitives | |
298 | -- from the CPP side. | |
299 | ||
cc60bd16 | 300 | and then not Is_CPP_Class (Root_Typ); |
24971415 | 301 | end Building_Static_DT; |
302 | ||
17e14451 | 303 | ---------------------------------- |
304 | -- Build_Static_Dispatch_Tables -- | |
305 | ---------------------------------- | |
306 | ||
307 | procedure Build_Static_Dispatch_Tables (N : Entity_Id) is | |
308 | Target_List : List_Id; | |
309 | ||
310 | procedure Build_Dispatch_Tables (List : List_Id); | |
311 | -- Build the static dispatch table of tagged types found in the list of | |
312 | -- declarations. The generated nodes are added at the end of Target_List | |
313 | ||
314 | procedure Build_Package_Dispatch_Tables (N : Node_Id); | |
315 | -- Build static dispatch tables associated with package declaration N | |
316 | ||
317 | --------------------------- | |
318 | -- Build_Dispatch_Tables -- | |
319 | --------------------------- | |
320 | ||
321 | procedure Build_Dispatch_Tables (List : List_Id) is | |
322 | D : Node_Id; | |
323 | ||
324 | begin | |
325 | D := First (List); | |
326 | while Present (D) loop | |
327 | ||
328 | -- Handle nested packages and package bodies recursively. The | |
329 | -- generated code is placed on the Target_List established for | |
330 | -- the enclosing compilation unit. | |
331 | ||
332 | if Nkind (D) = N_Package_Declaration then | |
333 | Build_Package_Dispatch_Tables (D); | |
334 | ||
335 | elsif Nkind (D) = N_Package_Body then | |
336 | Build_Dispatch_Tables (Declarations (D)); | |
337 | ||
338 | elsif Nkind (D) = N_Package_Body_Stub | |
339 | and then Present (Library_Unit (D)) | |
340 | then | |
341 | Build_Dispatch_Tables | |
342 | (Declarations (Proper_Body (Unit (Library_Unit (D))))); | |
343 | ||
02a2406d | 344 | -- Handle full type declarations and derivations of library level |
345 | -- tagged types | |
17e14451 | 346 | |
3164ed99 | 347 | elsif Nkind_In (D, N_Full_Type_Declaration, |
348 | N_Derived_Type_Definition) | |
17e14451 | 349 | and then Is_Library_Level_Tagged_Type (Defining_Entity (D)) |
350 | and then Ekind (Defining_Entity (D)) /= E_Record_Subtype | |
351 | and then not Is_Private_Type (Defining_Entity (D)) | |
352 | then | |
442049cc | 353 | -- We do not generate dispatch tables for the internal types |
d9fac90e | 354 | -- created for a type extension with unknown discriminants |
355 | -- The needed information is shared with the source type, | |
356 | -- See Expand_N_Record_Extension. | |
357 | ||
442049cc | 358 | if Is_Underlying_Record_View (Defining_Entity (D)) |
359 | or else | |
360 | (not Comes_From_Source (Defining_Entity (D)) | |
361 | and then | |
2f29393f | 362 | Has_Unknown_Discriminants (Etype (Defining_Entity (D))) |
442049cc | 363 | and then |
2f29393f | 364 | not Comes_From_Source |
365 | (First_Subtype (Defining_Entity (D)))) | |
d9fac90e | 366 | then |
367 | null; | |
d9fac90e | 368 | else |
369 | Insert_List_After_And_Analyze (Last (Target_List), | |
370 | Make_DT (Defining_Entity (D))); | |
371 | end if; | |
17e14451 | 372 | |
373 | -- Handle private types of library level tagged types. We must | |
374 | -- exchange the private and full-view to ensure the correct | |
a735d663 | 375 | -- expansion. If the full view is a synchronized type ignore |
376 | -- the type because the table will be built for the corresponding | |
377 | -- record type, that has its own declaration. | |
17e14451 | 378 | |
379 | elsif (Nkind (D) = N_Private_Type_Declaration | |
380 | or else Nkind (D) = N_Private_Extension_Declaration) | |
381 | and then Present (Full_View (Defining_Entity (D))) | |
17e14451 | 382 | then |
383 | declare | |
acf97c11 | 384 | E1 : constant Entity_Id := Defining_Entity (D); |
a735d663 | 385 | E2 : constant Entity_Id := Full_View (E1); |
acf97c11 | 386 | |
17e14451 | 387 | begin |
a735d663 | 388 | if Is_Library_Level_Tagged_Type (E2) |
389 | and then Ekind (E2) /= E_Record_Subtype | |
390 | and then not Is_Concurrent_Type (E2) | |
391 | then | |
392 | Exchange_Declarations (E1); | |
393 | Insert_List_After_And_Analyze (Last (Target_List), | |
394 | Make_DT (E1)); | |
395 | Exchange_Declarations (E2); | |
396 | end if; | |
17e14451 | 397 | end; |
398 | end if; | |
399 | ||
400 | Next (D); | |
401 | end loop; | |
402 | end Build_Dispatch_Tables; | |
403 | ||
404 | ----------------------------------- | |
405 | -- Build_Package_Dispatch_Tables -- | |
406 | ----------------------------------- | |
407 | ||
408 | procedure Build_Package_Dispatch_Tables (N : Node_Id) is | |
409 | Spec : constant Node_Id := Specification (N); | |
410 | Id : constant Entity_Id := Defining_Entity (N); | |
411 | Vis_Decls : constant List_Id := Visible_Declarations (Spec); | |
412 | Priv_Decls : constant List_Id := Private_Declarations (Spec); | |
413 | ||
414 | begin | |
415 | Push_Scope (Id); | |
416 | ||
417 | if Present (Priv_Decls) then | |
418 | Build_Dispatch_Tables (Vis_Decls); | |
419 | Build_Dispatch_Tables (Priv_Decls); | |
420 | ||
421 | elsif Present (Vis_Decls) then | |
422 | Build_Dispatch_Tables (Vis_Decls); | |
423 | end if; | |
424 | ||
425 | Pop_Scope; | |
426 | end Build_Package_Dispatch_Tables; | |
427 | ||
428 | -- Start of processing for Build_Static_Dispatch_Tables | |
429 | ||
430 | begin | |
431 | if not Expander_Active | |
662256db | 432 | or else not Tagged_Type_Expansion |
17e14451 | 433 | then |
434 | return; | |
435 | end if; | |
436 | ||
437 | if Nkind (N) = N_Package_Declaration then | |
438 | declare | |
439 | Spec : constant Node_Id := Specification (N); | |
440 | Vis_Decls : constant List_Id := Visible_Declarations (Spec); | |
441 | Priv_Decls : constant List_Id := Private_Declarations (Spec); | |
442 | ||
443 | begin | |
444 | if Present (Priv_Decls) | |
445 | and then Is_Non_Empty_List (Priv_Decls) | |
446 | then | |
447 | Target_List := Priv_Decls; | |
448 | ||
449 | elsif not Present (Vis_Decls) then | |
450 | Target_List := New_List; | |
451 | Set_Private_Declarations (Spec, Target_List); | |
452 | else | |
453 | Target_List := Vis_Decls; | |
454 | end if; | |
455 | ||
456 | Build_Package_Dispatch_Tables (N); | |
457 | end; | |
458 | ||
459 | else pragma Assert (Nkind (N) = N_Package_Body); | |
460 | Target_List := Declarations (N); | |
461 | Build_Dispatch_Tables (Target_List); | |
462 | end if; | |
463 | end Build_Static_Dispatch_Tables; | |
464 | ||
f235fede | 465 | ------------------------------ |
466 | -- Convert_Tag_To_Interface -- | |
467 | ------------------------------ | |
468 | ||
469 | function Convert_Tag_To_Interface | |
470 | (Typ : Entity_Id; | |
471 | Expr : Node_Id) return Node_Id | |
472 | is | |
473 | Loc : constant Source_Ptr := Sloc (Expr); | |
474 | Anon_Type : Entity_Id; | |
475 | Result : Node_Id; | |
476 | ||
477 | begin | |
478 | pragma Assert (Is_Class_Wide_Type (Typ) | |
479 | and then Is_Interface (Typ) | |
480 | and then | |
481 | ((Nkind (Expr) = N_Selected_Component | |
4c58ddd7 | 482 | and then Is_Tag (Entity (Selector_Name (Expr)))) |
f235fede | 483 | or else |
484 | (Nkind (Expr) = N_Function_Call | |
4c58ddd7 | 485 | and then RTE_Available (RE_Displace) |
486 | and then Entity (Name (Expr)) = RTE (RE_Displace)))); | |
f235fede | 487 | |
488 | Anon_Type := Create_Itype (E_Anonymous_Access_Type, Expr); | |
489 | Set_Directly_Designated_Type (Anon_Type, Typ); | |
490 | Set_Etype (Anon_Type, Anon_Type); | |
491 | Set_Can_Never_Be_Null (Anon_Type); | |
492 | ||
493 | -- Decorate the size and alignment attributes of the anonymous access | |
02a2406d | 494 | -- type, as required by the back end. |
f235fede | 495 | |
496 | Layout_Type (Anon_Type); | |
497 | ||
498 | if Nkind (Expr) = N_Selected_Component | |
499 | and then Is_Tag (Entity (Selector_Name (Expr))) | |
500 | then | |
501 | Result := | |
502 | Make_Explicit_Dereference (Loc, | |
503 | Unchecked_Convert_To (Anon_Type, | |
504 | Make_Attribute_Reference (Loc, | |
505 | Prefix => Expr, | |
506 | Attribute_Name => Name_Address))); | |
507 | else | |
508 | Result := | |
509 | Make_Explicit_Dereference (Loc, | |
510 | Unchecked_Convert_To (Anon_Type, Expr)); | |
511 | end if; | |
512 | ||
513 | return Result; | |
514 | end Convert_Tag_To_Interface; | |
515 | ||
d00681a7 | 516 | ------------------- |
517 | -- CPP_Num_Prims -- | |
518 | ------------------- | |
519 | ||
520 | function CPP_Num_Prims (Typ : Entity_Id) return Nat is | |
521 | CPP_Typ : Entity_Id; | |
522 | Tag_Comp : Entity_Id; | |
523 | ||
524 | begin | |
525 | if not Is_Tagged_Type (Typ) | |
526 | or else not Is_CPP_Class (Root_Type (Typ)) | |
527 | then | |
528 | return 0; | |
529 | ||
530 | else | |
531 | CPP_Typ := Enclosing_CPP_Parent (Typ); | |
532 | Tag_Comp := First_Tag_Component (CPP_Typ); | |
533 | ||
02a2406d | 534 | -- If number of primitives already set in the tag component, use it |
d00681a7 | 535 | |
536 | if Present (Tag_Comp) | |
537 | and then DT_Entry_Count (Tag_Comp) /= No_Uint | |
538 | then | |
539 | return UI_To_Int (DT_Entry_Count (Tag_Comp)); | |
540 | ||
541 | -- Otherwise, count the primitives of the enclosing CPP type | |
542 | ||
543 | else | |
544 | declare | |
545 | Count : Nat := 0; | |
546 | Elmt : Elmt_Id; | |
547 | ||
548 | begin | |
549 | Elmt := First_Elmt (Primitive_Operations (CPP_Typ)); | |
550 | while Present (Elmt) loop | |
551 | Count := Count + 1; | |
552 | Next_Elmt (Elmt); | |
553 | end loop; | |
554 | ||
555 | return Count; | |
556 | end; | |
557 | end if; | |
558 | end if; | |
559 | end CPP_Num_Prims; | |
560 | ||
aad6babd | 561 | ------------------------------ |
562 | -- Default_Prim_Op_Position -- | |
563 | ------------------------------ | |
564 | ||
68f95949 | 565 | function Default_Prim_Op_Position (E : Entity_Id) return Uint is |
aad6babd | 566 | TSS_Name : TSS_Name_Type; |
aad6babd | 567 | |
568 | begin | |
aad6babd | 569 | Get_Name_String (Chars (E)); |
570 | TSS_Name := | |
571 | TSS_Name_Type | |
572 | (Name_Buffer (Name_Len - TSS_Name'Length + 1 .. Name_Len)); | |
573 | ||
574 | if Chars (E) = Name_uSize then | |
575 | return Uint_1; | |
576 | ||
aad6babd | 577 | elsif TSS_Name = TSS_Stream_Read then |
208fd589 | 578 | return Uint_2; |
aad6babd | 579 | |
580 | elsif TSS_Name = TSS_Stream_Write then | |
208fd589 | 581 | return Uint_3; |
aad6babd | 582 | |
583 | elsif TSS_Name = TSS_Stream_Input then | |
208fd589 | 584 | return Uint_4; |
aad6babd | 585 | |
586 | elsif TSS_Name = TSS_Stream_Output then | |
208fd589 | 587 | return Uint_5; |
aad6babd | 588 | |
589 | elsif Chars (E) = Name_Op_Eq then | |
208fd589 | 590 | return Uint_6; |
aad6babd | 591 | |
592 | elsif Chars (E) = Name_uAssign then | |
208fd589 | 593 | return Uint_7; |
aad6babd | 594 | |
595 | elsif TSS_Name = TSS_Deep_Adjust then | |
208fd589 | 596 | return Uint_8; |
aad6babd | 597 | |
598 | elsif TSS_Name = TSS_Deep_Finalize then | |
208fd589 | 599 | return Uint_9; |
aad6babd | 600 | |
6cb4b973 | 601 | -- In VM targets unconditionally allow obtaining the position associated |
602 | -- with predefined interface primitives since in these platforms any | |
603 | -- tagged type has these primitives. | |
604 | ||
605 | elsif Ada_Version >= Ada_2005 or else not Tagged_Type_Expansion then | |
76a1c25b | 606 | if Chars (E) = Name_uDisp_Asynchronous_Select then |
208fd589 | 607 | return Uint_10; |
d62940bf | 608 | |
76a1c25b | 609 | elsif Chars (E) = Name_uDisp_Conditional_Select then |
208fd589 | 610 | return Uint_11; |
d62940bf | 611 | |
76a1c25b | 612 | elsif Chars (E) = Name_uDisp_Get_Prim_Op_Kind then |
208fd589 | 613 | return Uint_12; |
d62940bf | 614 | |
76a1c25b | 615 | elsif Chars (E) = Name_uDisp_Get_Task_Id then |
208fd589 | 616 | return Uint_13; |
d62940bf | 617 | |
cdb1c38f | 618 | elsif Chars (E) = Name_uDisp_Requeue then |
208fd589 | 619 | return Uint_14; |
cdb1c38f | 620 | |
621 | elsif Chars (E) = Name_uDisp_Timed_Select then | |
208fd589 | 622 | return Uint_15; |
76a1c25b | 623 | end if; |
aad6babd | 624 | end if; |
76a1c25b | 625 | |
626 | raise Program_Error; | |
aad6babd | 627 | end Default_Prim_Op_Position; |
628 | ||
7189d17f | 629 | ----------------------------- |
630 | -- Expand_Dispatching_Call -- | |
631 | ----------------------------- | |
ee6ba406 | 632 | |
7189d17f | 633 | procedure Expand_Dispatching_Call (Call_Node : Node_Id) is |
ee6ba406 | 634 | Loc : constant Source_Ptr := Sloc (Call_Node); |
635 | Call_Typ : constant Entity_Id := Etype (Call_Node); | |
636 | ||
2ea346ac | 637 | Ctrl_Arg : constant Node_Id := Controlling_Argument (Call_Node); |
638 | Ctrl_Typ : constant Entity_Id := Base_Type (Etype (Ctrl_Arg)); | |
639 | Param_List : constant List_Id := Parameter_Associations (Call_Node); | |
ee6ba406 | 640 | |
af647dc7 | 641 | Subp : Entity_Id; |
7189d17f | 642 | CW_Typ : Entity_Id; |
643 | New_Call : Node_Id; | |
644 | New_Call_Name : Node_Id; | |
645 | New_Params : List_Id := No_List; | |
646 | Param : Node_Id; | |
647 | Res_Typ : Entity_Id; | |
648 | Subp_Ptr_Typ : Entity_Id; | |
649 | Subp_Typ : Entity_Id; | |
650 | Typ : Entity_Id; | |
651 | Eq_Prim_Op : Entity_Id := Empty; | |
652 | Controlling_Tag : Node_Id; | |
ee6ba406 | 653 | |
654 | function New_Value (From : Node_Id) return Node_Id; | |
9dfe12ae | 655 | -- From is the original Expression. New_Value is equivalent to a call |
656 | -- to Duplicate_Subexpr with an explicit dereference when From is an | |
7189d17f | 657 | -- access parameter. |
658 | ||
9dfe12ae | 659 | --------------- |
660 | -- New_Value -- | |
661 | --------------- | |
662 | ||
ee6ba406 | 663 | function New_Value (From : Node_Id) return Node_Id is |
664 | Res : constant Node_Id := Duplicate_Subexpr (From); | |
ee6ba406 | 665 | begin |
666 | if Is_Access_Type (Etype (From)) then | |
af647dc7 | 667 | return |
668 | Make_Explicit_Dereference (Sloc (From), | |
669 | Prefix => Res); | |
ee6ba406 | 670 | else |
671 | return Res; | |
672 | end if; | |
673 | end New_Value; | |
674 | ||
d215f619 | 675 | -- Local variables |
676 | ||
5a44b136 | 677 | New_Node : Node_Id; |
678 | SCIL_Node : Node_Id; | |
679 | SCIL_Related_Node : Node_Id := Call_Node; | |
d215f619 | 680 | |
7189d17f | 681 | -- Start of processing for Expand_Dispatching_Call |
ee6ba406 | 682 | |
683 | begin | |
725a69d2 | 684 | if No_Run_Time_Mode then |
685 | Error_Msg_CRT ("tagged types", Call_Node); | |
686 | return; | |
687 | end if; | |
688 | ||
02a2406d | 689 | -- Expand_Dispatching_Call is called directly from the semantics, so we |
690 | -- only proceed if the expander is active. | |
343d35dc | 691 | |
a33565dd | 692 | if not Expander_Active |
0f3b1f49 | 693 | |
694 | -- And there is no need to expand the call if we are compiling under | |
695 | -- restriction No_Dispatching_Calls; the semantic analyzer has | |
696 | -- previously notified the violation of this restriction. | |
697 | ||
343d35dc | 698 | or else Restriction_Active (No_Dispatching_Calls) |
687b5687 | 699 | |
700 | -- No action needed if the dispatching call has been already expanded | |
701 | ||
702 | or else Is_Expanded_Dispatching_Call (Name (Call_Node)) | |
343d35dc | 703 | then |
704 | return; | |
705 | end if; | |
68f95949 | 706 | |
af647dc7 | 707 | -- Set subprogram. If this is an inherited operation that was |
708 | -- overridden, the body that is being called is its alias. | |
709 | ||
710 | Subp := Entity (Name (Call_Node)); | |
ee6ba406 | 711 | |
712 | if Present (Alias (Subp)) | |
713 | and then Is_Inherited_Operation (Subp) | |
714 | and then No (DTC_Entity (Subp)) | |
715 | then | |
716 | Subp := Alias (Subp); | |
717 | end if; | |
718 | ||
7189d17f | 719 | -- Definition of the class-wide type and the tagged type |
ee6ba406 | 720 | |
7189d17f | 721 | -- If the controlling argument is itself a tag rather than a tagged |
722 | -- object, then use the class-wide type associated with the subprogram's | |
723 | -- controlling type. This case can occur when a call to an inherited | |
724 | -- primitive has an actual that originated from a default parameter | |
725 | -- given by a tag-indeterminate call and when there is no other | |
726 | -- controlling argument providing the tag (AI-239 requires dispatching). | |
727 | -- This capability of dispatching directly by tag is also needed by the | |
728 | -- implementation of AI-260 (for the generic dispatching constructors). | |
729 | ||
2ea346ac | 730 | if Ctrl_Typ = RTE (RE_Tag) |
68f95949 | 731 | or else (RTE_Available (RE_Interface_Tag) |
2ea346ac | 732 | and then Ctrl_Typ = RTE (RE_Interface_Tag)) |
aad6babd | 733 | then |
af647dc7 | 734 | CW_Typ := Class_Wide_Type (Find_Dispatching_Type (Subp)); |
7189d17f | 735 | |
725a69d2 | 736 | -- Class_Wide_Type is applied to the expressions used to initialize |
737 | -- CW_Typ, to ensure that CW_Typ always denotes a class-wide type, since | |
738 | -- there are cases where the controlling type is resolved to a specific | |
739 | -- type (such as for designated types of arguments such as CW'Access). | |
740 | ||
2ea346ac | 741 | elsif Is_Access_Type (Ctrl_Typ) then |
742 | CW_Typ := Class_Wide_Type (Designated_Type (Ctrl_Typ)); | |
7189d17f | 743 | |
ee6ba406 | 744 | else |
2ea346ac | 745 | CW_Typ := Class_Wide_Type (Ctrl_Typ); |
ee6ba406 | 746 | end if; |
747 | ||
bb5dfacc | 748 | Typ := Find_Specific_Type (CW_Typ); |
d62940bf | 749 | |
ee6ba406 | 750 | if not Is_Limited_Type (Typ) then |
751 | Eq_Prim_Op := Find_Prim_Op (Typ, Name_Op_Eq); | |
752 | end if; | |
753 | ||
343d35dc | 754 | -- Dispatching call to C++ primitive. Create a new parameter list |
755 | -- with no tag checks. | |
ee6ba406 | 756 | |
cd534f03 | 757 | New_Params := New_List; |
758 | ||
343d35dc | 759 | if Is_CPP_Class (Typ) then |
ee6ba406 | 760 | Param := First_Actual (Call_Node); |
761 | while Present (Param) loop | |
aad6babd | 762 | Append_To (New_Params, Relocate_Node (Param)); |
ee6ba406 | 763 | Next_Actual (Param); |
764 | end loop; | |
765 | ||
343d35dc | 766 | -- Dispatching call to Ada primitive |
767 | ||
ee6ba406 | 768 | elsif Present (Param_List) then |
cd534f03 | 769 | Apply_Tag_Checks (Call_Node); |
ee6ba406 | 770 | |
ee6ba406 | 771 | Param := First_Actual (Call_Node); |
772 | while Present (Param) loop | |
773 | ||
f365561f | 774 | -- Cases in which we may have generated run-time checks. Note that |
775 | -- we strip any qualification from Param before comparing with the | |
776 | -- already-stripped controlling argument. | |
777 | ||
778 | if Unqualify (Param) = Ctrl_Arg or else Subp = Eq_Prim_Op then | |
9dfe12ae | 779 | Append_To (New_Params, |
780 | Duplicate_Subexpr_Move_Checks (Param)); | |
ee6ba406 | 781 | |
0429d533 | 782 | elsif Nkind (Parent (Param)) /= N_Parameter_Association |
783 | or else not Is_Accessibility_Actual (Parent (Param)) | |
784 | then | |
ee6ba406 | 785 | Append_To (New_Params, Relocate_Node (Param)); |
786 | end if; | |
787 | ||
788 | Next_Actual (Param); | |
789 | end loop; | |
790 | end if; | |
791 | ||
792 | -- Generate the appropriate subprogram pointer type | |
793 | ||
68f95949 | 794 | if Etype (Subp) = Typ then |
ee6ba406 | 795 | Res_Typ := CW_Typ; |
796 | else | |
7189d17f | 797 | Res_Typ := Etype (Subp); |
ee6ba406 | 798 | end if; |
799 | ||
b6b96867 | 800 | Subp_Typ := Create_Itype (E_Subprogram_Type, Call_Node); |
ee6ba406 | 801 | Subp_Ptr_Typ := Create_Itype (E_Access_Subprogram_Type, Call_Node); |
802 | Set_Etype (Subp_Typ, Res_Typ); | |
ee6ba406 | 803 | Set_Returns_By_Ref (Subp_Typ, Returns_By_Ref (Subp)); |
265200d0 | 804 | Set_Convention (Subp_Typ, Convention (Subp)); |
805 | ||
806 | -- Notify gigi that the designated type is a dispatching primitive | |
807 | ||
808 | Set_Is_Dispatch_Table_Entity (Subp_Typ); | |
ee6ba406 | 809 | |
810 | -- Create a new list of parameters which is a copy of the old formal | |
811 | -- list including the creation of a new set of matching entities. | |
812 | ||
813 | declare | |
814 | Old_Formal : Entity_Id := First_Formal (Subp); | |
815 | New_Formal : Entity_Id; | |
725a69d2 | 816 | Extra : Entity_Id := Empty; |
ee6ba406 | 817 | |
818 | begin | |
819 | if Present (Old_Formal) then | |
820 | New_Formal := New_Copy (Old_Formal); | |
821 | Set_First_Entity (Subp_Typ, New_Formal); | |
822 | Param := First_Actual (Call_Node); | |
823 | ||
824 | loop | |
825 | Set_Scope (New_Formal, Subp_Typ); | |
826 | ||
827 | -- Change all the controlling argument types to be class-wide | |
7189d17f | 828 | -- to avoid a recursion in dispatching. |
ee6ba406 | 829 | |
7189d17f | 830 | if Is_Controlling_Formal (New_Formal) then |
ee6ba406 | 831 | Set_Etype (New_Formal, Etype (Param)); |
832 | end if; | |
833 | ||
cc60bd16 | 834 | -- If the type of the formal is an itype, there was code here |
835 | -- introduced in 1998 in revision 1.46, to create a new itype | |
836 | -- by copy. This seems useless, and in fact leads to semantic | |
837 | -- errors when the itype is the completion of a type derived | |
838 | -- from a private type. | |
ee6ba406 | 839 | |
840 | Extra := New_Formal; | |
841 | Next_Formal (Old_Formal); | |
842 | exit when No (Old_Formal); | |
843 | ||
844 | Set_Next_Entity (New_Formal, New_Copy (Old_Formal)); | |
845 | Next_Entity (New_Formal); | |
846 | Next_Actual (Param); | |
847 | end loop; | |
af647dc7 | 848 | |
849 | Set_Next_Entity (New_Formal, Empty); | |
ee6ba406 | 850 | Set_Last_Entity (Subp_Typ, Extra); |
725a69d2 | 851 | end if; |
ee6ba406 | 852 | |
725a69d2 | 853 | -- Now that the explicit formals have been duplicated, any extra |
854 | -- formals needed by the subprogram must be created. | |
ee6ba406 | 855 | |
725a69d2 | 856 | if Present (Extra) then |
857 | Set_Extra_Formal (Extra, Empty); | |
ee6ba406 | 858 | end if; |
725a69d2 | 859 | |
860 | Create_Extra_Formals (Subp_Typ); | |
ee6ba406 | 861 | end; |
862 | ||
b6b96867 | 863 | -- Complete description of pointer type, including size information, as |
864 | -- must be done with itypes to prevent order-of-elaboration anomalies | |
865 | -- in gigi. | |
866 | ||
ee6ba406 | 867 | Set_Etype (Subp_Ptr_Typ, Subp_Ptr_Typ); |
868 | Set_Directly_Designated_Type (Subp_Ptr_Typ, Subp_Typ); | |
acf97c11 | 869 | Set_Convention (Subp_Ptr_Typ, Convention (Subp_Typ)); |
b6b96867 | 870 | Layout_Type (Subp_Ptr_Typ); |
ee6ba406 | 871 | |
68f95949 | 872 | -- If the controlling argument is a value of type Ada.Tag or an abstract |
873 | -- interface class-wide type then use it directly. Otherwise, the tag | |
874 | -- must be extracted from the controlling object. | |
7189d17f | 875 | |
2ea346ac | 876 | if Ctrl_Typ = RTE (RE_Tag) |
68f95949 | 877 | or else (RTE_Available (RE_Interface_Tag) |
2ea346ac | 878 | and then Ctrl_Typ = RTE (RE_Interface_Tag)) |
68f95949 | 879 | then |
880 | Controlling_Tag := Duplicate_Subexpr (Ctrl_Arg); | |
881 | ||
343d35dc | 882 | -- Extract the tag from an unchecked type conversion. Done to avoid |
883 | -- the expansion of additional code just to obtain the value of such | |
884 | -- tag because the current management of interface type conversions | |
885 | -- generates in some cases this unchecked type conversion with the | |
886 | -- tag of the object (see Expand_Interface_Conversion). | |
887 | ||
888 | elsif Nkind (Ctrl_Arg) = N_Unchecked_Type_Conversion | |
889 | and then | |
890 | (Etype (Expression (Ctrl_Arg)) = RTE (RE_Tag) | |
891 | or else | |
892 | (RTE_Available (RE_Interface_Tag) | |
893 | and then | |
894 | Etype (Expression (Ctrl_Arg)) = RTE (RE_Interface_Tag))) | |
895 | then | |
896 | Controlling_Tag := Duplicate_Subexpr (Expression (Ctrl_Arg)); | |
897 | ||
68f95949 | 898 | -- Ada 2005 (AI-251): Abstract interface class-wide type |
899 | ||
2ea346ac | 900 | elsif Is_Interface (Ctrl_Typ) |
901 | and then Is_Class_Wide_Type (Ctrl_Typ) | |
aad6babd | 902 | then |
7189d17f | 903 | Controlling_Tag := Duplicate_Subexpr (Ctrl_Arg); |
904 | ||
905 | else | |
906 | Controlling_Tag := | |
907 | Make_Selected_Component (Loc, | |
1ea4332a | 908 | Prefix => Duplicate_Subexpr_Move_Checks (Ctrl_Arg), |
83c6c069 | 909 | Selector_Name => New_Occurrence_Of (DTC_Entity (Subp), Loc)); |
7189d17f | 910 | end if; |
911 | ||
1ea4332a | 912 | -- Handle dispatching calls to predefined primitives |
ee6ba406 | 913 | |
af647dc7 | 914 | if Is_Predefined_Dispatching_Operation (Subp) |
915 | or else Is_Predefined_Dispatching_Alias (Subp) | |
916 | then | |
ef40be71 | 917 | Build_Get_Predefined_Prim_Op_Address (Loc, |
918 | Tag_Node => Controlling_Tag, | |
919 | Position => DT_Position (Subp), | |
920 | New_Node => New_Node); | |
ee6ba406 | 921 | |
343d35dc | 922 | -- Handle dispatching calls to user-defined primitives |
68f95949 | 923 | |
924 | else | |
ef40be71 | 925 | Build_Get_Prim_Op_Address (Loc, |
23197014 | 926 | Typ => Underlying_Type (Find_Dispatching_Type (Subp)), |
ef40be71 | 927 | Tag_Node => Controlling_Tag, |
928 | Position => DT_Position (Subp), | |
929 | New_Node => New_Node); | |
68f95949 | 930 | end if; |
ee6ba406 | 931 | |
ef40be71 | 932 | New_Call_Name := |
933 | Unchecked_Convert_To (Subp_Ptr_Typ, New_Node); | |
934 | ||
5a44b136 | 935 | -- Generate the SCIL node for this dispatching call. Done now because |
936 | -- attribute SCIL_Controlling_Tag must be set after the new call name | |
937 | -- is built to reference the nodes that will see the SCIL backend | |
938 | -- (because Build_Get_Prim_Op_Address generates an unchecked type | |
939 | -- conversion which relocates the controlling tag node). | |
ee6ba406 | 940 | |
ef40be71 | 941 | if Generate_SCIL then |
5a44b136 | 942 | SCIL_Node := Make_SCIL_Dispatching_Call (Sloc (Call_Node)); |
943 | Set_SCIL_Entity (SCIL_Node, Typ); | |
944 | Set_SCIL_Target_Prim (SCIL_Node, Subp); | |
ef40be71 | 945 | |
946 | -- Common case: the controlling tag is the tag of an object | |
947 | -- (for example, obj.tag) | |
948 | ||
949 | if Nkind (Controlling_Tag) = N_Selected_Component then | |
950 | Set_SCIL_Controlling_Tag (SCIL_Node, Controlling_Tag); | |
951 | ||
952 | -- Handle renaming of selected component | |
953 | ||
954 | elsif Nkind (Controlling_Tag) = N_Identifier | |
1ea4332a | 955 | and then Nkind (Parent (Entity (Controlling_Tag))) = |
956 | N_Object_Renaming_Declaration | |
957 | and then Nkind (Name (Parent (Entity (Controlling_Tag)))) = | |
958 | N_Selected_Component | |
ef40be71 | 959 | then |
960 | Set_SCIL_Controlling_Tag (SCIL_Node, | |
961 | Name (Parent (Entity (Controlling_Tag)))); | |
962 | ||
963 | -- If the controlling tag is an identifier, the SCIL node references | |
964 | -- the corresponding object or parameter declaration | |
965 | ||
966 | elsif Nkind (Controlling_Tag) = N_Identifier | |
967 | and then Nkind_In (Parent (Entity (Controlling_Tag)), | |
1ea4332a | 968 | N_Object_Declaration, |
969 | N_Parameter_Specification) | |
ef40be71 | 970 | then |
971 | Set_SCIL_Controlling_Tag (SCIL_Node, | |
972 | Parent (Entity (Controlling_Tag))); | |
973 | ||
974 | -- If the controlling tag is a dereference, the SCIL node references | |
975 | -- the corresponding object or parameter declaration | |
976 | ||
977 | elsif Nkind (Controlling_Tag) = N_Explicit_Dereference | |
978 | and then Nkind (Prefix (Controlling_Tag)) = N_Identifier | |
979 | and then Nkind_In (Parent (Entity (Prefix (Controlling_Tag))), | |
1ea4332a | 980 | N_Object_Declaration, |
981 | N_Parameter_Specification) | |
ef40be71 | 982 | then |
983 | Set_SCIL_Controlling_Tag (SCIL_Node, | |
984 | Parent (Entity (Prefix (Controlling_Tag)))); | |
985 | ||
986 | -- For a direct reference of the tag of the type the SCIL node | |
6fb3c314 | 987 | -- references the internal object declaration containing the tag |
ef40be71 | 988 | -- of the type. |
989 | ||
990 | elsif Nkind (Controlling_Tag) = N_Attribute_Reference | |
991 | and then Attribute_Name (Controlling_Tag) = Name_Tag | |
992 | then | |
993 | Set_SCIL_Controlling_Tag (SCIL_Node, | |
994 | Parent | |
1ea4332a | 995 | (Node |
996 | (First_Elmt | |
997 | (Access_Disp_Table (Entity (Prefix (Controlling_Tag))))))); | |
ef40be71 | 998 | |
999 | -- Interfaces are not supported. For now we leave the SCIL node | |
1000 | -- decorated with the Controlling_Tag. More work needed here??? | |
1001 | ||
1002 | elsif Is_Interface (Etype (Controlling_Tag)) then | |
1003 | Set_SCIL_Controlling_Tag (SCIL_Node, Controlling_Tag); | |
1004 | ||
1005 | else | |
1006 | pragma Assert (False); | |
1007 | null; | |
1008 | end if; | |
1009 | end if; | |
1010 | ||
1011 | if Nkind (Call_Node) = N_Function_Call then | |
725a69d2 | 1012 | New_Call := |
1013 | Make_Function_Call (Loc, | |
1ea4332a | 1014 | Name => New_Call_Name, |
725a69d2 | 1015 | Parameter_Associations => New_Params); |
ee6ba406 | 1016 | |
725a69d2 | 1017 | -- If this is a dispatching "=", we must first compare the tags so |
1018 | -- we generate: x.tag = y.tag and then x = y | |
ee6ba406 | 1019 | |
725a69d2 | 1020 | if Subp = Eq_Prim_Op then |
1021 | Param := First_Actual (Call_Node); | |
aad6babd | 1022 | New_Call := |
725a69d2 | 1023 | Make_And_Then (Loc, |
1024 | Left_Opnd => | |
1025 | Make_Op_Eq (Loc, | |
1026 | Left_Opnd => | |
1027 | Make_Selected_Component (Loc, | |
1ea4332a | 1028 | Prefix => New_Value (Param), |
725a69d2 | 1029 | Selector_Name => |
83c6c069 | 1030 | New_Occurrence_Of (First_Tag_Component (Typ), |
725a69d2 | 1031 | Loc)), |
ee6ba406 | 1032 | |
725a69d2 | 1033 | Right_Opnd => |
1034 | Make_Selected_Component (Loc, | |
1ea4332a | 1035 | Prefix => |
725a69d2 | 1036 | Unchecked_Convert_To (Typ, |
1037 | New_Value (Next_Actual (Param))), | |
1038 | Selector_Name => | |
83c6c069 | 1039 | New_Occurrence_Of |
1ea4332a | 1040 | (First_Tag_Component (Typ), Loc))), |
725a69d2 | 1041 | Right_Opnd => New_Call); |
5a44b136 | 1042 | |
1043 | SCIL_Related_Node := Right_Opnd (New_Call); | |
ee6ba406 | 1044 | end if; |
1045 | ||
1046 | else | |
1047 | New_Call := | |
1048 | Make_Procedure_Call_Statement (Loc, | |
1ea4332a | 1049 | Name => New_Call_Name, |
ee6ba406 | 1050 | Parameter_Associations => New_Params); |
1051 | end if; | |
1052 | ||
e00e091c | 1053 | -- Register the dispatching call in the call graph nodes table |
1054 | ||
1055 | Register_CG_Node (Call_Node); | |
1056 | ||
ee6ba406 | 1057 | Rewrite (Call_Node, New_Call); |
725a69d2 | 1058 | |
5a44b136 | 1059 | -- Associate the SCIL node of this dispatching call |
1060 | ||
1061 | if Generate_SCIL then | |
1062 | Set_SCIL_Node (SCIL_Related_Node, SCIL_Node); | |
1063 | end if; | |
1064 | ||
02a2406d | 1065 | -- Suppress all checks during the analysis of the expanded code to avoid |
1066 | -- the generation of spurious warnings under ZFP run-time. | |
725a69d2 | 1067 | |
1068 | Analyze_And_Resolve (Call_Node, Call_Typ, Suppress => All_Checks); | |
7189d17f | 1069 | end Expand_Dispatching_Call; |
ee6ba406 | 1070 | |
aad6babd | 1071 | --------------------------------- |
1072 | -- Expand_Interface_Conversion -- | |
1073 | --------------------------------- | |
1074 | ||
61ce7f9f | 1075 | procedure Expand_Interface_Conversion (N : Node_Id) is |
1076 | function Underlying_Record_Type (Typ : Entity_Id) return Entity_Id; | |
1077 | -- Return the underlying record type of Typ. | |
aad6babd | 1078 | |
61ce7f9f | 1079 | ---------------------------- |
1080 | -- Underlying_Record_Type -- | |
1081 | ---------------------------- | |
aad6babd | 1082 | |
61ce7f9f | 1083 | function Underlying_Record_Type (Typ : Entity_Id) return Entity_Id is |
1084 | E : Entity_Id := Typ; | |
aad6babd | 1085 | |
61ce7f9f | 1086 | begin |
1087 | -- Handle access to class-wide interface types | |
aad6babd | 1088 | |
61ce7f9f | 1089 | if Is_Access_Type (E) then |
1090 | E := Etype (Directly_Designated_Type (E)); | |
1091 | end if; | |
aad6babd | 1092 | |
61ce7f9f | 1093 | -- Handle class-wide types. This conversion can appear explicitly in |
1094 | -- the source code. Example: I'Class (Obj) | |
aad6babd | 1095 | |
61ce7f9f | 1096 | if Is_Class_Wide_Type (E) then |
1097 | E := Root_Type (E); | |
1098 | end if; | |
d62940bf | 1099 | |
61ce7f9f | 1100 | -- If the target type is a tagged synchronized type, the dispatch |
1101 | -- table info is in the corresponding record type. | |
79a72728 | 1102 | |
61ce7f9f | 1103 | if Is_Concurrent_Type (E) then |
1104 | E := Corresponding_Record_Type (E); | |
1105 | end if; | |
79a72728 | 1106 | |
61ce7f9f | 1107 | -- Handle private types |
1108 | ||
1109 | E := Underlying_Type (E); | |
23197014 | 1110 | |
61ce7f9f | 1111 | -- Handle subtypes |
23197014 | 1112 | |
61ce7f9f | 1113 | return Base_Type (E); |
1114 | end Underlying_Record_Type; | |
1115 | ||
1116 | -- Local variables | |
1117 | ||
1118 | Loc : constant Source_Ptr := Sloc (N); | |
1119 | Etyp : constant Entity_Id := Etype (N); | |
1120 | Operand : constant Node_Id := Expression (N); | |
1121 | Operand_Typ : Entity_Id := Etype (Operand); | |
1122 | Func : Node_Id; | |
1123 | Iface_Typ : constant Entity_Id := Underlying_Record_Type (Etype (N)); | |
1124 | Iface_Tag : Entity_Id; | |
1125 | Is_Static : Boolean; | |
1126 | ||
1127 | -- Start of processing for Expand_Interface_Conversion | |
1128 | ||
1129 | begin | |
a17cc77d | 1130 | -- Freeze the entity associated with the target interface to have |
1131 | -- available the attribute Access_Disp_Table. | |
1132 | ||
1133 | Freeze_Before (N, Iface_Typ); | |
1134 | ||
61ce7f9f | 1135 | -- Ada 2005 (AI-345): Handle synchronized interface type derivations |
1136 | ||
1137 | if Is_Concurrent_Type (Operand_Typ) then | |
1138 | Operand_Typ := Base_Type (Corresponding_Record_Type (Operand_Typ)); | |
1139 | end if; | |
1140 | ||
7e0d01bf | 1141 | -- No displacement of the pointer to the object needed when the type of |
1142 | -- the operand is not an interface type and the interface is one of | |
1143 | -- its parent types (since they share the primary dispatch table). | |
1144 | ||
1145 | declare | |
1146 | Opnd : Entity_Id := Operand_Typ; | |
1147 | ||
1148 | begin | |
1149 | if Is_Access_Type (Opnd) then | |
1150 | Opnd := Designated_Type (Opnd); | |
1151 | end if; | |
1152 | ||
1153 | if not Is_Interface (Opnd) | |
1154 | and then Is_Ancestor (Iface_Typ, Opnd, Use_Full_View => True) | |
1155 | then | |
1156 | return; | |
1157 | end if; | |
1158 | end; | |
1159 | ||
61ce7f9f | 1160 | -- Evaluate if we can statically displace the pointer to the object |
1161 | ||
1162 | declare | |
1163 | Opnd_Typ : constant Node_Id := Underlying_Record_Type (Operand_Typ); | |
1164 | ||
1165 | begin | |
1166 | Is_Static := | |
1167 | not Is_Interface (Opnd_Typ) | |
1168 | and then Interface_Present_In_Ancestor | |
1169 | (Typ => Opnd_Typ, | |
1170 | Iface => Iface_Typ) | |
1171 | and then (Etype (Opnd_Typ) = Opnd_Typ | |
1172 | or else not | |
1173 | Is_Variable_Size_Record (Etype (Opnd_Typ))); | |
1174 | end; | |
aad6babd | 1175 | |
662256db | 1176 | if not Tagged_Type_Expansion then |
79500ea0 | 1177 | if VM_Target /= No_VM then |
1178 | if Is_Access_Type (Operand_Typ) then | |
1179 | Operand_Typ := Designated_Type (Operand_Typ); | |
1180 | end if; | |
725a69d2 | 1181 | |
79500ea0 | 1182 | if Is_Class_Wide_Type (Operand_Typ) then |
1183 | Operand_Typ := Root_Type (Operand_Typ); | |
1184 | end if; | |
1185 | ||
61ce7f9f | 1186 | if not Is_Static and then Operand_Typ /= Iface_Typ then |
79500ea0 | 1187 | Insert_Action (N, |
1188 | Make_Procedure_Call_Statement (Loc, | |
1189 | Name => New_Occurrence_Of | |
1190 | (RTE (RE_Check_Interface_Conversion), Loc), | |
1191 | Parameter_Associations => New_List ( | |
1192 | Make_Attribute_Reference (Loc, | |
61ce7f9f | 1193 | Prefix => Duplicate_Subexpr (Expression (N)), |
79500ea0 | 1194 | Attribute_Name => Name_Tag), |
1195 | Make_Attribute_Reference (Loc, | |
83c6c069 | 1196 | Prefix => New_Occurrence_Of (Iface_Typ, Loc), |
79500ea0 | 1197 | Attribute_Name => Name_Tag)))); |
1198 | end if; | |
8408cef9 | 1199 | |
1200 | -- Just do a conversion ??? | |
1201 | ||
1202 | Rewrite (N, Unchecked_Convert_To (Etype (N), N)); | |
1203 | Analyze (N); | |
79500ea0 | 1204 | end if; |
725a69d2 | 1205 | |
725a69d2 | 1206 | return; |
aa0a69ab | 1207 | |
1208 | -- A static conversion to an interface type that is not classwide is | |
1209 | -- curious but legal if the interface operation is a null procedure. | |
1210 | -- If the operation is abstract it will be rejected later. | |
1211 | ||
1212 | elsif Is_Static | |
1213 | and then Is_Interface (Etype (N)) | |
1214 | and then not Is_Class_Wide_Type (Etype (N)) | |
1215 | and then Comes_From_Source (N) | |
1216 | then | |
1217 | Rewrite (N, Unchecked_Convert_To (Etype (N), N)); | |
1218 | Analyze (N); | |
1219 | return; | |
725a69d2 | 1220 | end if; |
1221 | ||
952af0b9 | 1222 | if not Is_Static then |
68f95949 | 1223 | |
1224 | -- Give error if configurable run time and Displace not available | |
1225 | ||
1226 | if not RTE_Available (RE_Displace) then | |
cc60bd16 | 1227 | Error_Msg_CRT ("dynamic interface conversion", N); |
68f95949 | 1228 | return; |
1229 | end if; | |
1230 | ||
725a69d2 | 1231 | -- Handle conversion of access-to-class-wide interface types. Target |
1232 | -- can be an access to an object or an access to another class-wide | |
1233 | -- interface (see -1- and -2- in the following example): | |
af647dc7 | 1234 | |
1235 | -- type Iface1_Ref is access all Iface1'Class; | |
1236 | -- type Iface2_Ref is access all Iface1'Class; | |
1237 | ||
1238 | -- Acc1 : Iface1_Ref := new ... | |
1239 | -- Obj : Obj_Ref := Obj_Ref (Acc); -- 1 | |
1240 | -- Acc2 : Iface2_Ref := Iface2_Ref (Acc); -- 2 | |
1241 | ||
1242 | if Is_Access_Type (Operand_Typ) then | |
af647dc7 | 1243 | Rewrite (N, |
1244 | Unchecked_Convert_To (Etype (N), | |
1245 | Make_Function_Call (Loc, | |
83c6c069 | 1246 | Name => New_Occurrence_Of (RTE (RE_Displace), Loc), |
af647dc7 | 1247 | Parameter_Associations => New_List ( |
1248 | ||
1249 | Unchecked_Convert_To (RTE (RE_Address), | |
1250 | Relocate_Node (Expression (N))), | |
1251 | ||
1252 | New_Occurrence_Of | |
1253 | (Node (First_Elmt (Access_Disp_Table (Iface_Typ))), | |
1254 | Loc))))); | |
1255 | ||
1256 | Analyze (N); | |
1257 | return; | |
1258 | end if; | |
1259 | ||
952af0b9 | 1260 | Rewrite (N, |
1261 | Make_Function_Call (Loc, | |
83c6c069 | 1262 | Name => New_Occurrence_Of (RTE (RE_Displace), Loc), |
952af0b9 | 1263 | Parameter_Associations => New_List ( |
1264 | Make_Attribute_Reference (Loc, | |
1265 | Prefix => Relocate_Node (Expression (N)), | |
1266 | Attribute_Name => Name_Address), | |
af647dc7 | 1267 | |
952af0b9 | 1268 | New_Occurrence_Of |
1269 | (Node (First_Elmt (Access_Disp_Table (Iface_Typ))), | |
1270 | Loc)))); | |
1271 | ||
1272 | Analyze (N); | |
1273 | ||
02a2406d | 1274 | -- If target is a class-wide interface, change the type of the data |
1275 | -- returned by IW_Convert to indicate this is a dispatching call. | |
952af0b9 | 1276 | |
17e14451 | 1277 | declare |
1278 | New_Itype : Entity_Id; | |
952af0b9 | 1279 | |
17e14451 | 1280 | begin |
1281 | New_Itype := Create_Itype (E_Anonymous_Access_Type, N); | |
cc60bd16 | 1282 | Set_Etype (New_Itype, New_Itype); |
17e14451 | 1283 | Set_Directly_Designated_Type (New_Itype, Etyp); |
952af0b9 | 1284 | |
17e14451 | 1285 | Rewrite (N, |
1286 | Make_Explicit_Dereference (Loc, | |
1287 | Prefix => | |
1288 | Unchecked_Convert_To (New_Itype, Relocate_Node (N)))); | |
1289 | Analyze (N); | |
1290 | Freeze_Itype (New_Itype, N); | |
1291 | ||
1292 | return; | |
1293 | end; | |
952af0b9 | 1294 | end if; |
1295 | ||
d62940bf | 1296 | Iface_Tag := Find_Interface_Tag (Operand_Typ, Iface_Typ); |
aad6babd | 1297 | pragma Assert (Iface_Tag /= Empty); |
1298 | ||
d62940bf | 1299 | -- Keep separate access types to interfaces because one internal |
f235fede | 1300 | -- function is used to handle the null value (see following comments) |
d62940bf | 1301 | |
1302 | if not Is_Access_Type (Etype (N)) then | |
f235fede | 1303 | |
02a2406d | 1304 | -- Statically displace the pointer to the object to reference the |
1305 | -- component containing the secondary dispatch table. | |
f235fede | 1306 | |
d62940bf | 1307 | Rewrite (N, |
f235fede | 1308 | Convert_Tag_To_Interface (Class_Wide_Type (Iface_Typ), |
d62940bf | 1309 | Make_Selected_Component (Loc, |
1310 | Prefix => Relocate_Node (Expression (N)), | |
f235fede | 1311 | Selector_Name => New_Occurrence_Of (Iface_Tag, Loc)))); |
d62940bf | 1312 | |
1313 | else | |
39a0c1d3 | 1314 | -- Build internal function to handle the case in which the actual is |
1315 | -- null. If the actual is null returns null because no displacement | |
1316 | -- is required; otherwise performs a type conversion that will be | |
1317 | -- expanded in the code that returns the value of the displaced | |
1318 | -- actual. That is: | |
d62940bf | 1319 | |
af647dc7 | 1320 | -- function Func (O : Address) return Iface_Typ is |
17e14451 | 1321 | -- type Op_Typ is access all Operand_Typ; |
1322 | -- Aux : Op_Typ := To_Op_Typ (O); | |
d62940bf | 1323 | -- begin |
af647dc7 | 1324 | -- if O = Null_Address then |
d62940bf | 1325 | -- return null; |
1326 | -- else | |
17e14451 | 1327 | -- return Iface_Typ!(Aux.Iface_Tag'Address); |
d62940bf | 1328 | -- end if; |
1329 | -- end Func; | |
1330 | ||
af647dc7 | 1331 | declare |
17e14451 | 1332 | Desig_Typ : Entity_Id; |
1333 | Fent : Entity_Id; | |
1334 | New_Typ_Decl : Node_Id; | |
17e14451 | 1335 | Stats : List_Id; |
1336 | ||
af647dc7 | 1337 | begin |
1338 | Desig_Typ := Etype (Expression (N)); | |
d62940bf | 1339 | |
af647dc7 | 1340 | if Is_Access_Type (Desig_Typ) then |
865909d3 | 1341 | Desig_Typ := |
1342 | Available_View (Directly_Designated_Type (Desig_Typ)); | |
af647dc7 | 1343 | end if; |
d62940bf | 1344 | |
e7e688dd | 1345 | if Is_Concurrent_Type (Desig_Typ) then |
1346 | Desig_Typ := Base_Type (Corresponding_Record_Type (Desig_Typ)); | |
1347 | end if; | |
1348 | ||
17e14451 | 1349 | New_Typ_Decl := |
1350 | Make_Full_Type_Declaration (Loc, | |
ec97ce79 | 1351 | Defining_Identifier => Make_Temporary (Loc, 'T'), |
17e14451 | 1352 | Type_Definition => |
1353 | Make_Access_To_Object_Definition (Loc, | |
1354 | All_Present => True, | |
1355 | Null_Exclusion_Present => False, | |
1356 | Constant_Present => False, | |
1357 | Subtype_Indication => | |
83c6c069 | 1358 | New_Occurrence_Of (Desig_Typ, Loc))); |
d62940bf | 1359 | |
725a69d2 | 1360 | Stats := New_List ( |
17e14451 | 1361 | Make_Simple_Return_Statement (Loc, |
1362 | Unchecked_Convert_To (Etype (N), | |
1363 | Make_Attribute_Reference (Loc, | |
02a2406d | 1364 | Prefix => |
17e14451 | 1365 | Make_Selected_Component (Loc, |
02a2406d | 1366 | Prefix => |
e7e688dd | 1367 | Unchecked_Convert_To |
1368 | (Defining_Identifier (New_Typ_Decl), | |
1369 | Make_Identifier (Loc, Name_uO)), | |
17e14451 | 1370 | Selector_Name => |
1371 | New_Occurrence_Of (Iface_Tag, Loc)), | |
1372 | Attribute_Name => Name_Address)))); | |
725a69d2 | 1373 | |
17e14451 | 1374 | -- If the type is null-excluding, no need for the null branch. |
1375 | -- Otherwise we need to check for it and return null. | |
1376 | ||
1377 | if not Can_Never_Be_Null (Etype (N)) then | |
1378 | Stats := New_List ( | |
1379 | Make_If_Statement (Loc, | |
1380 | Condition => | |
1381 | Make_Op_Eq (Loc, | |
1382 | Left_Opnd => Make_Identifier (Loc, Name_uO), | |
83c6c069 | 1383 | Right_Opnd => New_Occurrence_Of |
17e14451 | 1384 | (RTE (RE_Null_Address), Loc)), |
1385 | ||
1386 | Then_Statements => New_List ( | |
02a2406d | 1387 | Make_Simple_Return_Statement (Loc, Make_Null (Loc))), |
17e14451 | 1388 | Else_Statements => Stats)); |
1389 | end if; | |
d62940bf | 1390 | |
ec97ce79 | 1391 | Fent := Make_Temporary (Loc, 'F'); |
17e14451 | 1392 | Func := |
1393 | Make_Subprogram_Body (Loc, | |
1394 | Specification => | |
1395 | Make_Function_Specification (Loc, | |
1396 | Defining_Unit_Name => Fent, | |
d62940bf | 1397 | |
17e14451 | 1398 | Parameter_Specifications => New_List ( |
1399 | Make_Parameter_Specification (Loc, | |
1400 | Defining_Identifier => | |
1401 | Make_Defining_Identifier (Loc, Name_uO), | |
1402 | Parameter_Type => | |
83c6c069 | 1403 | New_Occurrence_Of (RTE (RE_Address), Loc))), |
d62940bf | 1404 | |
17e14451 | 1405 | Result_Definition => |
83c6c069 | 1406 | New_Occurrence_Of (Etype (N), Loc)), |
d62940bf | 1407 | |
e7e688dd | 1408 | Declarations => New_List (New_Typ_Decl), |
d62940bf | 1409 | |
17e14451 | 1410 | Handled_Statement_Sequence => |
1411 | Make_Handled_Sequence_Of_Statements (Loc, Stats)); | |
d62940bf | 1412 | |
17e14451 | 1413 | -- Place function body before the expression containing the |
1414 | -- conversion. We suppress all checks because the body of the | |
1415 | -- internally generated function already takes care of the case | |
1416 | -- in which the actual is null; therefore there is no need to | |
1417 | -- double check that the pointer is not null when the program | |
1418 | -- executes the alternative that performs the type conversion). | |
af647dc7 | 1419 | |
17e14451 | 1420 | Insert_Action (N, Func, Suppress => All_Checks); |
af647dc7 | 1421 | |
17e14451 | 1422 | if Is_Access_Type (Etype (Expression (N))) then |
af647dc7 | 1423 | |
cbd025d6 | 1424 | Apply_Accessibility_Check |
b29768cb | 1425 | (N => Expression (N), |
1426 | Typ => Etype (N), | |
cbd025d6 | 1427 | Insert_Node => N); |
1428 | ||
e7e688dd | 1429 | -- Generate: Func (Address!(Expression)) |
af647dc7 | 1430 | |
17e14451 | 1431 | Rewrite (N, |
1432 | Make_Function_Call (Loc, | |
b29768cb | 1433 | Name => New_Occurrence_Of (Fent, Loc), |
17e14451 | 1434 | Parameter_Associations => New_List ( |
e7e688dd | 1435 | Unchecked_Convert_To (RTE (RE_Address), |
1436 | Relocate_Node (Expression (N)))))); | |
17e14451 | 1437 | |
1438 | else | |
e7e688dd | 1439 | -- Generate: Func (Operand_Typ!(Expression)'Address) |
17e14451 | 1440 | |
1441 | Rewrite (N, | |
1442 | Make_Function_Call (Loc, | |
b29768cb | 1443 | Name => New_Occurrence_Of (Fent, Loc), |
17e14451 | 1444 | Parameter_Associations => New_List ( |
1445 | Make_Attribute_Reference (Loc, | |
1446 | Prefix => Unchecked_Convert_To (Operand_Typ, | |
1447 | Relocate_Node (Expression (N))), | |
1448 | Attribute_Name => Name_Address)))); | |
1449 | end if; | |
1450 | end; | |
d62940bf | 1451 | end if; |
aad6babd | 1452 | |
1453 | Analyze (N); | |
1454 | end Expand_Interface_Conversion; | |
1455 | ||
1456 | ------------------------------ | |
1457 | -- Expand_Interface_Actuals -- | |
1458 | ------------------------------ | |
1459 | ||
1460 | procedure Expand_Interface_Actuals (Call_Node : Node_Id) is | |
aad6babd | 1461 | Actual : Node_Id; |
d62940bf | 1462 | Actual_Dup : Node_Id; |
aad6babd | 1463 | Actual_Typ : Entity_Id; |
d62940bf | 1464 | Anon : Entity_Id; |
aad6babd | 1465 | Conversion : Node_Id; |
1466 | Formal : Entity_Id; | |
1467 | Formal_Typ : Entity_Id; | |
1468 | Subp : Entity_Id; | |
d62940bf | 1469 | Formal_DDT : Entity_Id; |
1470 | Actual_DDT : Entity_Id; | |
aad6babd | 1471 | |
1472 | begin | |
1473 | -- This subprogram is called directly from the semantics, so we need a | |
1474 | -- check to see whether expansion is active before proceeding. | |
1475 | ||
1476 | if not Expander_Active then | |
1477 | return; | |
1478 | end if; | |
1479 | ||
1480 | -- Call using access to subprogram with explicit dereference | |
1481 | ||
1482 | if Nkind (Name (Call_Node)) = N_Explicit_Dereference then | |
1483 | Subp := Etype (Name (Call_Node)); | |
1484 | ||
4e5db562 | 1485 | -- Call using selected component |
1486 | ||
1487 | elsif Nkind (Name (Call_Node)) = N_Selected_Component then | |
1488 | Subp := Entity (Selector_Name (Name (Call_Node))); | |
1489 | ||
1490 | -- Call using direct name | |
aad6babd | 1491 | |
1492 | else | |
1493 | Subp := Entity (Name (Call_Node)); | |
1494 | end if; | |
1495 | ||
725a69d2 | 1496 | -- Ada 2005 (AI-251): Look for interface type formals to force "this" |
1497 | -- displacement | |
1498 | ||
aad6babd | 1499 | Formal := First_Formal (Subp); |
1500 | Actual := First_Actual (Call_Node); | |
aad6babd | 1501 | while Present (Formal) loop |
725a69d2 | 1502 | Formal_Typ := Etype (Formal); |
d62940bf | 1503 | |
1504 | if Ekind (Formal_Typ) = E_Record_Type_With_Private then | |
1505 | Formal_Typ := Full_View (Formal_Typ); | |
1506 | end if; | |
1507 | ||
1508 | if Is_Access_Type (Formal_Typ) then | |
1509 | Formal_DDT := Directly_Designated_Type (Formal_Typ); | |
1510 | end if; | |
1511 | ||
aad6babd | 1512 | Actual_Typ := Etype (Actual); |
1513 | ||
d62940bf | 1514 | if Is_Access_Type (Actual_Typ) then |
1515 | Actual_DDT := Directly_Designated_Type (Actual_Typ); | |
1516 | end if; | |
1517 | ||
725a69d2 | 1518 | if Is_Interface (Formal_Typ) |
1519 | and then Is_Class_Wide_Type (Formal_Typ) | |
1520 | then | |
d62940bf | 1521 | -- No need to displace the pointer if the type of the actual |
1d00a8ce | 1522 | -- coincides with the type of the formal. |
aad6babd | 1523 | |
725a69d2 | 1524 | if Actual_Typ = Formal_Typ then |
d62940bf | 1525 | null; |
1526 | ||
02a2406d | 1527 | -- No need to displace the pointer if the interface type is a |
1528 | -- parent of the type of the actual because in this case the | |
725a69d2 | 1529 | -- interface primitives are located in the primary dispatch table. |
aad6babd | 1530 | |
cb4af01d | 1531 | elsif Is_Ancestor (Formal_Typ, Actual_Typ, |
1532 | Use_Full_View => True) | |
1533 | then | |
d62940bf | 1534 | null; |
1535 | ||
02a2406d | 1536 | -- Implicit conversion to the class-wide formal type to force the |
1537 | -- displacement of the pointer. | |
725a69d2 | 1538 | |
d62940bf | 1539 | else |
8a8d9086 | 1540 | -- Normally, expansion of actuals for calls to build-in-place |
1541 | -- functions happens as part of Expand_Actuals, but in this | |
1542 | -- case the call will be wrapped in a conversion and soon after | |
1543 | -- expanded further to handle the displacement for a class-wide | |
1544 | -- interface conversion, so if this is a BIP call then we need | |
1545 | -- to handle it now. | |
1546 | ||
1547 | if Ada_Version >= Ada_2005 | |
1548 | and then Is_Build_In_Place_Function_Call (Actual) | |
1549 | then | |
1550 | Make_Build_In_Place_Call_In_Anonymous_Context (Actual); | |
1551 | end if; | |
1552 | ||
d62940bf | 1553 | Conversion := Convert_To (Formal_Typ, Relocate_Node (Actual)); |
725a69d2 | 1554 | Rewrite (Actual, Conversion); |
d62940bf | 1555 | Analyze_And_Resolve (Actual, Formal_Typ); |
1556 | end if; | |
aad6babd | 1557 | |
725a69d2 | 1558 | -- Access to class-wide interface type |
aad6babd | 1559 | |
1560 | elsif Is_Access_Type (Formal_Typ) | |
725a69d2 | 1561 | and then Is_Interface (Formal_DDT) |
1562 | and then Is_Class_Wide_Type (Formal_DDT) | |
aad6babd | 1563 | and then Interface_Present_In_Ancestor |
d62940bf | 1564 | (Typ => Actual_DDT, |
1565 | Iface => Etype (Formal_DDT)) | |
aad6babd | 1566 | then |
725a69d2 | 1567 | -- Handle attributes 'Access and 'Unchecked_Access |
1568 | ||
aad6babd | 1569 | if Nkind (Actual) = N_Attribute_Reference |
1570 | and then | |
1571 | (Attribute_Name (Actual) = Name_Access | |
1572 | or else Attribute_Name (Actual) = Name_Unchecked_Access) | |
1573 | then | |
5e82d8fe | 1574 | -- This case must have been handled by the analysis and |
1575 | -- expansion of 'Access. The only exception is when types | |
1576 | -- match and no further expansion is required. | |
aad6babd | 1577 | |
5e82d8fe | 1578 | pragma Assert (Base_Type (Etype (Prefix (Actual))) |
1579 | = Base_Type (Formal_DDT)); | |
1580 | null; | |
aad6babd | 1581 | |
725a69d2 | 1582 | -- No need to displace the pointer if the type of the actual |
1583 | -- coincides with the type of the formal. | |
d62940bf | 1584 | |
725a69d2 | 1585 | elsif Actual_DDT = Formal_DDT then |
d62940bf | 1586 | null; |
1587 | ||
725a69d2 | 1588 | -- No need to displace the pointer if the interface type is |
1589 | -- a parent of the type of the actual because in this case the | |
1590 | -- interface primitives are located in the primary dispatch table. | |
d62940bf | 1591 | |
cb4af01d | 1592 | elsif Is_Ancestor (Formal_DDT, Actual_DDT, |
1593 | Use_Full_View => True) | |
1594 | then | |
d62940bf | 1595 | null; |
1596 | ||
aad6babd | 1597 | else |
d62940bf | 1598 | Actual_Dup := Relocate_Node (Actual); |
1599 | ||
4aa270d8 | 1600 | if From_Limited_With (Actual_Typ) then |
d62940bf | 1601 | |
02a2406d | 1602 | -- If the type of the actual parameter comes from a |
1603 | -- limited with-clause and the non-limited view is already | |
1604 | -- available, we replace the anonymous access type by | |
1605 | -- a duplicate declaration whose designated type is the | |
1606 | -- non-limited view. | |
d62940bf | 1607 | |
40993cdb | 1608 | if Has_Non_Limited_View (Actual_DDT) then |
d62940bf | 1609 | Anon := New_Copy (Actual_Typ); |
1610 | ||
1611 | if Is_Itype (Anon) then | |
1612 | Set_Scope (Anon, Current_Scope); | |
1613 | end if; | |
1614 | ||
542823a9 | 1615 | Set_Directly_Designated_Type |
1616 | (Anon, Non_Limited_View (Actual_DDT)); | |
d62940bf | 1617 | Set_Etype (Actual_Dup, Anon); |
d62940bf | 1618 | end if; |
1619 | end if; | |
1620 | ||
1621 | Conversion := Convert_To (Formal_Typ, Actual_Dup); | |
1622 | Rewrite (Actual, Conversion); | |
aad6babd | 1623 | Analyze_And_Resolve (Actual, Formal_Typ); |
1624 | end if; | |
1625 | end if; | |
1626 | ||
1627 | Next_Actual (Actual); | |
1628 | Next_Formal (Formal); | |
1629 | end loop; | |
1630 | end Expand_Interface_Actuals; | |
1631 | ||
1632 | ---------------------------- | |
1633 | -- Expand_Interface_Thunk -- | |
1634 | ---------------------------- | |
1635 | ||
725a69d2 | 1636 | procedure Expand_Interface_Thunk |
17e14451 | 1637 | (Prim : Node_Id; |
1638 | Thunk_Id : out Entity_Id; | |
1639 | Thunk_Code : out Node_Id) | |
aad6babd | 1640 | is |
e8376947 | 1641 | Loc : constant Source_Ptr := Sloc (Prim); |
1642 | Actuals : constant List_Id := New_List; | |
1643 | Decl : constant List_Id := New_List; | |
1644 | Formals : constant List_Id := New_List; | |
1645 | Target : constant Entity_Id := Ultimate_Alias (Prim); | |
725a69d2 | 1646 | |
c6431a40 | 1647 | Decl_1 : Node_Id; |
1648 | Decl_2 : Node_Id; | |
1649 | Expr : Node_Id; | |
1650 | Formal : Node_Id; | |
1651 | Ftyp : Entity_Id; | |
1652 | Iface_Formal : Node_Id; | |
1653 | New_Arg : Node_Id; | |
1654 | Offset_To_Top : Node_Id; | |
1655 | Target_Formal : Entity_Id; | |
aad6babd | 1656 | |
1657 | begin | |
725a69d2 | 1658 | Thunk_Id := Empty; |
1659 | Thunk_Code := Empty; | |
1660 | ||
3f8cf2d2 | 1661 | -- No thunk needed if the primitive has been eliminated |
1662 | ||
1663 | if Is_Eliminated (Ultimate_Alias (Prim)) then | |
1664 | return; | |
1665 | ||
e8376947 | 1666 | -- In case of primitives that are functions without formals and a |
1667 | -- controlling result there is no need to build the thunk. | |
725a69d2 | 1668 | |
3f8cf2d2 | 1669 | elsif not Present (First_Formal (Target)) then |
725a69d2 | 1670 | pragma Assert (Ekind (Target) = E_Function |
1671 | and then Has_Controlling_Result (Target)); | |
1672 | return; | |
1673 | end if; | |
1674 | ||
04c6d723 | 1675 | -- Duplicate the formals of the Target primitive. In the thunk, the type |
1676 | -- of the controlling formal is the covered interface type (instead of | |
1677 | -- the target tagged type). Done to avoid problems with discriminated | |
1678 | -- tagged types because, if the controlling type has discriminants with | |
e8376947 | 1679 | -- default values, then the type conversions done inside the body of |
1680 | -- the thunk (after the displacement of the pointer to the base of the | |
04c6d723 | 1681 | -- actual object) generate code that modify its contents. |
1682 | ||
1683 | -- Note: This special management is not done for predefined primitives | |
1684 | -- because??? | |
1685 | ||
1686 | if not Is_Predefined_Dispatching_Operation (Prim) then | |
1687 | Iface_Formal := First_Formal (Interface_Alias (Prim)); | |
1688 | end if; | |
aad6babd | 1689 | |
d62940bf | 1690 | Formal := First_Formal (Target); |
aad6babd | 1691 | while Present (Formal) loop |
04c6d723 | 1692 | Ftyp := Etype (Formal); |
1693 | ||
1694 | -- Use the interface type as the type of the controlling formal (see | |
e8376947 | 1695 | -- comment above). |
04c6d723 | 1696 | |
1697 | if not Is_Controlling_Formal (Formal) | |
1698 | or else Is_Predefined_Dispatching_Operation (Prim) | |
1699 | then | |
1700 | Ftyp := Etype (Formal); | |
1701 | Expr := New_Copy_Tree (Expression (Parent (Formal))); | |
1702 | else | |
1703 | Ftyp := Etype (Iface_Formal); | |
1704 | Expr := Empty; | |
1705 | end if; | |
1706 | ||
725a69d2 | 1707 | Append_To (Formals, |
1708 | Make_Parameter_Specification (Loc, | |
1709 | Defining_Identifier => | |
1710 | Make_Defining_Identifier (Sloc (Formal), | |
1711 | Chars => Chars (Formal)), | |
1712 | In_Present => In_Present (Parent (Formal)), | |
1713 | Out_Present => Out_Present (Parent (Formal)), | |
83c6c069 | 1714 | Parameter_Type => New_Occurrence_Of (Ftyp, Loc), |
04c6d723 | 1715 | Expression => Expr)); |
1716 | ||
1717 | if not Is_Predefined_Dispatching_Operation (Prim) then | |
1718 | Next_Formal (Iface_Formal); | |
1719 | end if; | |
d62940bf | 1720 | |
aad6babd | 1721 | Next_Formal (Formal); |
1722 | end loop; | |
1723 | ||
725a69d2 | 1724 | Target_Formal := First_Formal (Target); |
1725 | Formal := First (Formals); | |
1726 | while Present (Formal) loop | |
04c6d723 | 1727 | |
6cd460aa | 1728 | -- If the parent is a constrained discriminated type, then the |
1729 | -- primitive operation will have been defined on a first subtype. | |
1730 | -- For proper matching with controlling type, use base type. | |
04c6d723 | 1731 | |
1732 | if Ekind (Target_Formal) = E_In_Parameter | |
1733 | and then Ekind (Etype (Target_Formal)) = E_Anonymous_Access_Type | |
1734 | then | |
6cd460aa | 1735 | Ftyp := |
1736 | Base_Type (Directly_Designated_Type (Etype (Target_Formal))); | |
04c6d723 | 1737 | else |
ca12fde2 | 1738 | Ftyp := Base_Type (Etype (Target_Formal)); |
04c6d723 | 1739 | end if; |
1740 | ||
232a63ed | 1741 | -- For concurrent types, the relevant information is found in the |
1742 | -- Corresponding_Record_Type, rather than the type entity itself. | |
6cd460aa | 1743 | |
04c6d723 | 1744 | if Is_Concurrent_Type (Ftyp) then |
1745 | Ftyp := Corresponding_Record_Type (Ftyp); | |
1746 | end if; | |
1747 | ||
725a69d2 | 1748 | if Ekind (Target_Formal) = E_In_Parameter |
1749 | and then Ekind (Etype (Target_Formal)) = E_Anonymous_Access_Type | |
40cdae8b | 1750 | and then Is_Controlling_Formal (Target_Formal) |
725a69d2 | 1751 | then |
1752 | -- Generate: | |
17e14451 | 1753 | -- type T is access all <<type of the target formal>> |
1754 | -- S : Storage_Offset := Storage_Offset!(Formal) | |
1755 | -- - Offset_To_Top (address!(Formal)) | |
725a69d2 | 1756 | |
1757 | Decl_2 := | |
1758 | Make_Full_Type_Declaration (Loc, | |
ec97ce79 | 1759 | Defining_Identifier => Make_Temporary (Loc, 'T'), |
725a69d2 | 1760 | Type_Definition => |
1761 | Make_Access_To_Object_Definition (Loc, | |
1762 | All_Present => True, | |
1763 | Null_Exclusion_Present => False, | |
1764 | Constant_Present => False, | |
1765 | Subtype_Indication => | |
83c6c069 | 1766 | New_Occurrence_Of (Ftyp, Loc))); |
725a69d2 | 1767 | |
cc60bd16 | 1768 | New_Arg := |
1769 | Unchecked_Convert_To (RTE (RE_Address), | |
83c6c069 | 1770 | New_Occurrence_Of (Defining_Identifier (Formal), Loc)); |
cc60bd16 | 1771 | |
1772 | if not RTE_Available (RE_Offset_To_Top) then | |
1773 | Offset_To_Top := | |
1774 | Build_Offset_To_Top (Loc, New_Arg); | |
1775 | else | |
1776 | Offset_To_Top := | |
1777 | Make_Function_Call (Loc, | |
83c6c069 | 1778 | Name => New_Occurrence_Of (RTE (RE_Offset_To_Top), Loc), |
cc60bd16 | 1779 | Parameter_Associations => New_List (New_Arg)); |
1780 | end if; | |
1781 | ||
725a69d2 | 1782 | Decl_1 := |
1783 | Make_Object_Declaration (Loc, | |
ec97ce79 | 1784 | Defining_Identifier => Make_Temporary (Loc, 'S'), |
725a69d2 | 1785 | Constant_Present => True, |
1786 | Object_Definition => | |
83c6c069 | 1787 | New_Occurrence_Of (RTE (RE_Storage_Offset), Loc), |
725a69d2 | 1788 | Expression => |
1789 | Make_Op_Subtract (Loc, | |
1790 | Left_Opnd => | |
1791 | Unchecked_Convert_To | |
1792 | (RTE (RE_Storage_Offset), | |
83c6c069 | 1793 | New_Occurrence_Of |
1794 | (Defining_Identifier (Formal), Loc)), | |
725a69d2 | 1795 | Right_Opnd => |
cc60bd16 | 1796 | Offset_To_Top)); |
725a69d2 | 1797 | |
1798 | Append_To (Decl, Decl_2); | |
1799 | Append_To (Decl, Decl_1); | |
1800 | ||
17e14451 | 1801 | -- Reference the new actual. Generate: |
1802 | -- T!(S) | |
725a69d2 | 1803 | |
1804 | Append_To (Actuals, | |
1805 | Unchecked_Convert_To | |
1806 | (Defining_Identifier (Decl_2), | |
83c6c069 | 1807 | New_Occurrence_Of (Defining_Identifier (Decl_1), Loc))); |
725a69d2 | 1808 | |
40cdae8b | 1809 | elsif Is_Controlling_Formal (Target_Formal) then |
aad6babd | 1810 | |
e8376947 | 1811 | -- Generate: |
17e14451 | 1812 | -- S1 : Storage_Offset := Storage_Offset!(Formal'Address) |
1813 | -- - Offset_To_Top (Formal'Address) | |
1814 | -- S2 : Addr_Ptr := Addr_Ptr!(S1) | |
aad6babd | 1815 | |
cc60bd16 | 1816 | New_Arg := |
1817 | Make_Attribute_Reference (Loc, | |
1818 | Prefix => | |
83c6c069 | 1819 | New_Occurrence_Of (Defining_Identifier (Formal), Loc), |
cc60bd16 | 1820 | Attribute_Name => |
1821 | Name_Address); | |
1822 | ||
1823 | if not RTE_Available (RE_Offset_To_Top) then | |
1824 | Offset_To_Top := | |
1825 | Build_Offset_To_Top (Loc, New_Arg); | |
1826 | else | |
1827 | Offset_To_Top := | |
1828 | Make_Function_Call (Loc, | |
83c6c069 | 1829 | Name => New_Occurrence_Of (RTE (RE_Offset_To_Top), Loc), |
cc60bd16 | 1830 | Parameter_Associations => New_List (New_Arg)); |
1831 | end if; | |
1832 | ||
725a69d2 | 1833 | Decl_1 := |
1834 | Make_Object_Declaration (Loc, | |
ec97ce79 | 1835 | Defining_Identifier => Make_Temporary (Loc, 'S'), |
725a69d2 | 1836 | Constant_Present => True, |
1837 | Object_Definition => | |
83c6c069 | 1838 | New_Occurrence_Of (RTE (RE_Storage_Offset), Loc), |
725a69d2 | 1839 | Expression => |
1840 | Make_Op_Subtract (Loc, | |
1841 | Left_Opnd => | |
1842 | Unchecked_Convert_To | |
1843 | (RTE (RE_Storage_Offset), | |
1844 | Make_Attribute_Reference (Loc, | |
1845 | Prefix => | |
83c6c069 | 1846 | New_Occurrence_Of |
725a69d2 | 1847 | (Defining_Identifier (Formal), Loc), |
1848 | Attribute_Name => Name_Address)), | |
1849 | Right_Opnd => | |
cc60bd16 | 1850 | Offset_To_Top)); |
aad6babd | 1851 | |
725a69d2 | 1852 | Decl_2 := |
1853 | Make_Object_Declaration (Loc, | |
ec97ce79 | 1854 | Defining_Identifier => Make_Temporary (Loc, 'S'), |
1855 | Constant_Present => True, | |
1856 | Object_Definition => | |
83c6c069 | 1857 | New_Occurrence_Of (RTE (RE_Addr_Ptr), Loc), |
ec97ce79 | 1858 | Expression => |
725a69d2 | 1859 | Unchecked_Convert_To |
1860 | (RTE (RE_Addr_Ptr), | |
83c6c069 | 1861 | New_Occurrence_Of (Defining_Identifier (Decl_1), Loc))); |
aad6babd | 1862 | |
725a69d2 | 1863 | Append_To (Decl, Decl_1); |
1864 | Append_To (Decl, Decl_2); | |
952af0b9 | 1865 | |
ec97ce79 | 1866 | -- Reference the new actual, generate: |
17e14451 | 1867 | -- Target_Formal (S2.all) |
aad6babd | 1868 | |
725a69d2 | 1869 | Append_To (Actuals, |
04c6d723 | 1870 | Unchecked_Convert_To (Ftyp, |
725a69d2 | 1871 | Make_Explicit_Dereference (Loc, |
83c6c069 | 1872 | New_Occurrence_Of (Defining_Identifier (Decl_2), Loc)))); |
aad6babd | 1873 | |
984d005d | 1874 | -- Ensure proper matching of access types. Required to avoid |
1875 | -- reporting spurious errors. | |
1876 | ||
1877 | elsif Is_Access_Type (Etype (Target_Formal)) then | |
1878 | Append_To (Actuals, | |
1879 | Unchecked_Convert_To (Base_Type (Etype (Target_Formal)), | |
83c6c069 | 1880 | New_Occurrence_Of (Defining_Identifier (Formal), Loc))); |
984d005d | 1881 | |
725a69d2 | 1882 | -- No special management required for this actual |
aad6babd | 1883 | |
725a69d2 | 1884 | else |
1885 | Append_To (Actuals, | |
83c6c069 | 1886 | New_Occurrence_Of (Defining_Identifier (Formal), Loc)); |
725a69d2 | 1887 | end if; |
1888 | ||
1889 | Next_Formal (Target_Formal); | |
aad6babd | 1890 | Next (Formal); |
1891 | end loop; | |
1892 | ||
ec97ce79 | 1893 | Thunk_Id := Make_Temporary (Loc, 'T'); |
b1961352 | 1894 | Set_Ekind (Thunk_Id, Ekind (Prim)); |
e7e688dd | 1895 | Set_Is_Thunk (Thunk_Id); |
265200d0 | 1896 | Set_Convention (Thunk_Id, Convention (Prim)); |
cdc5a761 | 1897 | Set_Thunk_Entity (Thunk_Id, Target); |
e7e688dd | 1898 | |
e8376947 | 1899 | -- Procedure case |
1900 | ||
d62940bf | 1901 | if Ekind (Target) = E_Procedure then |
725a69d2 | 1902 | Thunk_Code := |
aad6babd | 1903 | Make_Subprogram_Body (Loc, |
1904 | Specification => | |
1905 | Make_Procedure_Specification (Loc, | |
1906 | Defining_Unit_Name => Thunk_Id, | |
1907 | Parameter_Specifications => Formals), | |
1908 | Declarations => Decl, | |
1909 | Handled_Statement_Sequence => | |
1910 | Make_Handled_Sequence_Of_Statements (Loc, | |
1911 | Statements => New_List ( | |
1912 | Make_Procedure_Call_Statement (Loc, | |
725a69d2 | 1913 | Name => New_Occurrence_Of (Target, Loc), |
1914 | Parameter_Associations => Actuals)))); | |
aad6babd | 1915 | |
e8376947 | 1916 | -- Function case |
aad6babd | 1917 | |
e8376947 | 1918 | else pragma Assert (Ekind (Target) = E_Function); |
61ce7f9f | 1919 | declare |
1920 | Result_Def : Node_Id; | |
1921 | Call_Node : Node_Id; | |
1922 | ||
1923 | begin | |
1924 | Call_Node := | |
1925 | Make_Function_Call (Loc, | |
1926 | Name => New_Occurrence_Of (Target, Loc), | |
1927 | Parameter_Associations => Actuals); | |
1928 | ||
1929 | if not Is_Interface (Etype (Prim)) then | |
1930 | Result_Def := New_Copy (Result_Definition (Parent (Target))); | |
1931 | ||
1932 | -- Thunk of function returning a class-wide interface object. No | |
1933 | -- extra displacement needed since the displacement is generated | |
1934 | -- in the return statement of Prim. Example: | |
1935 | ||
1936 | -- type Iface is interface ... | |
1937 | -- function F (O : Iface) return Iface'Class; | |
1938 | ||
1939 | -- type T is new ... and Iface with ... | |
1940 | -- function F (O : T) return Iface'Class; | |
1941 | ||
1942 | elsif Is_Class_Wide_Type (Etype (Prim)) then | |
1943 | Result_Def := New_Occurrence_Of (Etype (Prim), Loc); | |
1944 | ||
1945 | -- Thunk of function returning an interface object. Displacement | |
1946 | -- needed. Example: | |
1947 | ||
1948 | -- type Iface is interface ... | |
1949 | -- function F (O : Iface) return Iface; | |
1950 | ||
1951 | -- type T is new ... and Iface with ... | |
1952 | -- function F (O : T) return T; | |
1953 | ||
1954 | else | |
1955 | Result_Def := | |
1956 | New_Occurrence_Of (Class_Wide_Type (Etype (Prim)), Loc); | |
1957 | ||
1958 | -- Adding implicit conversion to force the displacement of | |
1959 | -- the pointer to the object to reference the corresponding | |
1960 | -- secondary dispatch table. | |
1961 | ||
1962 | Call_Node := | |
1963 | Make_Type_Conversion (Loc, | |
1964 | Subtype_Mark => | |
1965 | New_Occurrence_Of (Class_Wide_Type (Etype (Prim)), Loc), | |
1966 | Expression => Relocate_Node (Call_Node)); | |
1967 | end if; | |
1968 | ||
1969 | Thunk_Code := | |
1970 | Make_Subprogram_Body (Loc, | |
02a2406d | 1971 | Specification => |
61ce7f9f | 1972 | Make_Function_Specification (Loc, |
1973 | Defining_Unit_Name => Thunk_Id, | |
1974 | Parameter_Specifications => Formals, | |
1975 | Result_Definition => Result_Def), | |
02a2406d | 1976 | Declarations => Decl, |
61ce7f9f | 1977 | Handled_Statement_Sequence => |
1978 | Make_Handled_Sequence_Of_Statements (Loc, | |
1979 | Statements => New_List ( | |
1980 | Make_Simple_Return_Statement (Loc, Call_Node)))); | |
1981 | end; | |
aad6babd | 1982 | end if; |
aad6babd | 1983 | end Expand_Interface_Thunk; |
1984 | ||
d00681a7 | 1985 | -------------------------- |
1986 | -- Has_CPP_Constructors -- | |
1987 | -------------------------- | |
1988 | ||
1989 | function Has_CPP_Constructors (Typ : Entity_Id) return Boolean is | |
1990 | E : Entity_Id; | |
1991 | ||
1992 | begin | |
1993 | -- Look for the constructor entities | |
1994 | ||
1995 | E := Next_Entity (Typ); | |
1996 | while Present (E) loop | |
02a2406d | 1997 | if Ekind (E) = E_Function and then Is_Constructor (E) then |
d00681a7 | 1998 | return True; |
1999 | end if; | |
2000 | ||
2001 | Next_Entity (E); | |
2002 | end loop; | |
2003 | ||
2004 | return False; | |
2005 | end Has_CPP_Constructors; | |
2006 | ||
24971415 | 2007 | ------------ |
2008 | -- Has_DT -- | |
2009 | ------------ | |
2010 | ||
2011 | function Has_DT (Typ : Entity_Id) return Boolean is | |
2012 | begin | |
2013 | return not Is_Interface (Typ) | |
02a2406d | 2014 | and then not Restriction_Active (No_Dispatching_Calls); |
24971415 | 2015 | end Has_DT; |
2016 | ||
687b5687 | 2017 | ---------------------------------- |
2018 | -- Is_Expanded_Dispatching_Call -- | |
2019 | ---------------------------------- | |
2020 | ||
2021 | function Is_Expanded_Dispatching_Call (N : Node_Id) return Boolean is | |
2022 | begin | |
2023 | return Nkind (N) in N_Subprogram_Call | |
2024 | and then Nkind (Name (N)) = N_Explicit_Dereference | |
2025 | and then Is_Dispatch_Table_Entity (Etype (Name (N))); | |
2026 | end Is_Expanded_Dispatching_Call; | |
2027 | ||
a652dd51 | 2028 | ----------------------------------------- |
2029 | -- Is_Predefined_Dispatching_Operation -- | |
2030 | ----------------------------------------- | |
2031 | ||
2032 | function Is_Predefined_Dispatching_Operation | |
2033 | (E : Entity_Id) return Boolean | |
2034 | is | |
2035 | TSS_Name : TSS_Name_Type; | |
2036 | ||
2037 | begin | |
2038 | if not Is_Dispatching_Operation (E) then | |
2039 | return False; | |
2040 | end if; | |
2041 | ||
2042 | Get_Name_String (Chars (E)); | |
2043 | ||
2044 | -- Most predefined primitives have internally generated names. Equality | |
2045 | -- must be treated differently; the predefined operation is recognized | |
2046 | -- as a homogeneous binary operator that returns Boolean. | |
2047 | ||
2048 | if Name_Len > TSS_Name_Type'Last then | |
2049 | TSS_Name := TSS_Name_Type (Name_Buffer (Name_Len - TSS_Name'Length + 1 | |
2050 | .. Name_Len)); | |
2051 | if Chars (E) = Name_uSize | |
a652dd51 | 2052 | or else TSS_Name = TSS_Stream_Read |
2053 | or else TSS_Name = TSS_Stream_Write | |
2054 | or else TSS_Name = TSS_Stream_Input | |
2055 | or else TSS_Name = TSS_Stream_Output | |
2056 | or else | |
2057 | (Chars (E) = Name_Op_Eq | |
30592778 | 2058 | and then Etype (First_Formal (E)) = Etype (Last_Formal (E))) |
a652dd51 | 2059 | or else Chars (E) = Name_uAssign |
2060 | or else TSS_Name = TSS_Deep_Adjust | |
2061 | or else TSS_Name = TSS_Deep_Finalize | |
2062 | or else Is_Predefined_Interface_Primitive (E) | |
2063 | then | |
2064 | return True; | |
2065 | end if; | |
2066 | end if; | |
2067 | ||
2068 | return False; | |
2069 | end Is_Predefined_Dispatching_Operation; | |
2070 | ||
d1458a07 | 2071 | --------------------------------------- |
2072 | -- Is_Predefined_Internal_Operation -- | |
2073 | --------------------------------------- | |
2074 | ||
2075 | function Is_Predefined_Internal_Operation | |
2076 | (E : Entity_Id) return Boolean | |
2077 | is | |
2078 | TSS_Name : TSS_Name_Type; | |
2079 | ||
2080 | begin | |
2081 | if not Is_Dispatching_Operation (E) then | |
2082 | return False; | |
2083 | end if; | |
2084 | ||
2085 | Get_Name_String (Chars (E)); | |
2086 | ||
2087 | -- Most predefined primitives have internally generated names. Equality | |
2088 | -- must be treated differently; the predefined operation is recognized | |
2089 | -- as a homogeneous binary operator that returns Boolean. | |
2090 | ||
2091 | if Name_Len > TSS_Name_Type'Last then | |
2092 | TSS_Name := | |
2093 | TSS_Name_Type | |
2094 | (Name_Buffer (Name_Len - TSS_Name'Length + 1 .. Name_Len)); | |
2095 | ||
18393965 | 2096 | if Nam_In (Chars (E), Name_uSize, Name_uAssign) |
d1458a07 | 2097 | or else |
2098 | (Chars (E) = Name_Op_Eq | |
18393965 | 2099 | and then Etype (First_Formal (E)) = Etype (Last_Formal (E))) |
d1458a07 | 2100 | or else TSS_Name = TSS_Deep_Adjust |
2101 | or else TSS_Name = TSS_Deep_Finalize | |
2102 | or else Is_Predefined_Interface_Primitive (E) | |
2103 | then | |
2104 | return True; | |
2105 | end if; | |
2106 | end if; | |
2107 | ||
2108 | return False; | |
2109 | end Is_Predefined_Internal_Operation; | |
2110 | ||
af647dc7 | 2111 | ------------------------------------- |
2112 | -- Is_Predefined_Dispatching_Alias -- | |
2113 | ------------------------------------- | |
2114 | ||
2115 | function Is_Predefined_Dispatching_Alias (Prim : Entity_Id) return Boolean | |
2116 | is | |
af647dc7 | 2117 | begin |
fc2907f6 | 2118 | return not Is_Predefined_Dispatching_Operation (Prim) |
af647dc7 | 2119 | and then Present (Alias (Prim)) |
fc2907f6 | 2120 | and then Is_Predefined_Dispatching_Operation (Ultimate_Alias (Prim)); |
af647dc7 | 2121 | end Is_Predefined_Dispatching_Alias; |
2122 | ||
a652dd51 | 2123 | --------------------------------------- |
2124 | -- Is_Predefined_Interface_Primitive -- | |
2125 | --------------------------------------- | |
2126 | ||
2127 | function Is_Predefined_Interface_Primitive (E : Entity_Id) return Boolean is | |
2128 | begin | |
6cb4b973 | 2129 | -- In VM targets we don't restrict the functionality of this test to |
2130 | -- compiling in Ada 2005 mode since in VM targets any tagged type has | |
02a2406d | 2131 | -- these primitives. |
6cb4b973 | 2132 | |
2133 | return (Ada_Version >= Ada_2005 or else not Tagged_Type_Expansion) | |
02a2406d | 2134 | and then Nam_In (Chars (E), Name_uDisp_Asynchronous_Select, |
2135 | Name_uDisp_Conditional_Select, | |
2136 | Name_uDisp_Get_Prim_Op_Kind, | |
2137 | Name_uDisp_Get_Task_Id, | |
2138 | Name_uDisp_Requeue, | |
2139 | Name_uDisp_Timed_Select); | |
a652dd51 | 2140 | end Is_Predefined_Interface_Primitive; |
2141 | ||
76a1c25b | 2142 | ---------------------------------------- |
2143 | -- Make_Disp_Asynchronous_Select_Body -- | |
2144 | ---------------------------------------- | |
ee6ba406 | 2145 | |
cdb1c38f | 2146 | -- For interface types, generate: |
2147 | ||
2148 | -- procedure _Disp_Asynchronous_Select | |
2149 | -- (T : in out <Typ>; | |
2150 | -- S : Integer; | |
2151 | -- P : System.Address; | |
2152 | -- B : out System.Storage_Elements.Dummy_Communication_Block; | |
2153 | -- F : out Boolean) | |
2154 | -- is | |
2155 | -- begin | |
a053db0d | 2156 | -- F := False; |
2157 | -- C := Ada.Tags.POK_Function; | |
cdb1c38f | 2158 | -- end _Disp_Asynchronous_Select; |
2159 | ||
2160 | -- For protected types, generate: | |
2161 | ||
2162 | -- procedure _Disp_Asynchronous_Select | |
2163 | -- (T : in out <Typ>; | |
2164 | -- S : Integer; | |
2165 | -- P : System.Address; | |
2166 | -- B : out System.Storage_Elements.Dummy_Communication_Block; | |
2167 | -- F : out Boolean) | |
2168 | -- is | |
2169 | -- I : Integer := | |
2170 | -- Ada.Tags.Get_Entry_Index (Ada.Tags.Tag (<Typ>VP, S)); | |
2171 | -- Bnn : System.Tasking.Protected_Objects.Operations. | |
2172 | -- Communication_Block; | |
2173 | -- begin | |
2174 | -- System.Tasking.Protected_Objects.Operations.Protected_Entry_Call | |
2175 | -- (T._object'Access, | |
2176 | -- System.Tasking.Protected_Objects.Protected_Entry_Index (I), | |
2177 | -- P, | |
2178 | -- System.Tasking.Asynchronous_Call, | |
2179 | -- Bnn); | |
2180 | -- B := System.Storage_Elements.Dummy_Communication_Block (Bnn); | |
2181 | -- end _Disp_Asynchronous_Select; | |
2182 | ||
2183 | -- For task types, generate: | |
2184 | ||
2185 | -- procedure _Disp_Asynchronous_Select | |
2186 | -- (T : in out <Typ>; | |
2187 | -- S : Integer; | |
2188 | -- P : System.Address; | |
2189 | -- B : out System.Storage_Elements.Dummy_Communication_Block; | |
2190 | -- F : out Boolean) | |
2191 | -- is | |
2192 | -- I : Integer := | |
2193 | -- Ada.Tags.Get_Entry_Index (Ada.Tags.Tag (<Typ>VP, S)); | |
2194 | -- begin | |
2195 | -- System.Tasking.Rendezvous.Task_Entry_Call | |
2196 | -- (T._task_id, | |
2197 | -- System.Tasking.Task_Entry_Index (I), | |
2198 | -- P, | |
2199 | -- System.Tasking.Asynchronous_Call, | |
2200 | -- F); | |
2201 | -- end _Disp_Asynchronous_Select; | |
2202 | ||
76a1c25b | 2203 | function Make_Disp_Asynchronous_Select_Body |
2204 | (Typ : Entity_Id) return Node_Id | |
2205 | is | |
725a69d2 | 2206 | Com_Block : Entity_Id; |
2207 | Conc_Typ : Entity_Id := Empty; | |
2208 | Decls : constant List_Id := New_List; | |
725a69d2 | 2209 | Loc : constant Source_Ptr := Sloc (Typ); |
acf97c11 | 2210 | Obj_Ref : Node_Id; |
725a69d2 | 2211 | Stmts : constant List_Id := New_List; |
bf7f5966 | 2212 | Tag_Node : Node_Id; |
ee6ba406 | 2213 | |
2214 | begin | |
68f95949 | 2215 | pragma Assert (not Restriction_Active (No_Dispatching_Calls)); |
2216 | ||
952af0b9 | 2217 | -- Null body is generated for interface types |
2218 | ||
76a1c25b | 2219 | if Is_Interface (Typ) then |
2220 | return | |
2221 | Make_Subprogram_Body (Loc, | |
02a2406d | 2222 | Specification => |
2223 | Make_Disp_Asynchronous_Select_Spec (Typ), | |
2224 | Declarations => New_List, | |
76a1c25b | 2225 | Handled_Statement_Sequence => |
2226 | Make_Handled_Sequence_Of_Statements (Loc, | |
02a2406d | 2227 | New_List ( |
2228 | Make_Assignment_Statement (Loc, | |
2229 | Name => Make_Identifier (Loc, Name_uF), | |
2230 | Expression => New_Occurrence_Of (Standard_False, Loc))))); | |
9dfe12ae | 2231 | end if; |
2232 | ||
952af0b9 | 2233 | if Is_Concurrent_Record_Type (Typ) then |
2234 | Conc_Typ := Corresponding_Concurrent_Type (Typ); | |
aad6babd | 2235 | |
76a1c25b | 2236 | -- Generate: |
cdb1c38f | 2237 | -- I : Integer := |
2238 | -- Ada.Tags.Get_Entry_Index (Ada.Tags.Tag! (<type>VP), S); | |
aad6babd | 2239 | |
76a1c25b | 2240 | -- where I will be used to capture the entry index of the primitive |
2241 | -- wrapper at position S. | |
aad6babd | 2242 | |
bf7f5966 | 2243 | if Tagged_Type_Expansion then |
2244 | Tag_Node := | |
2245 | Unchecked_Convert_To (RTE (RE_Tag), | |
83c6c069 | 2246 | New_Occurrence_Of |
bf7f5966 | 2247 | (Node (First_Elmt (Access_Disp_Table (Typ))), Loc)); |
2248 | else | |
2249 | Tag_Node := | |
2250 | Make_Attribute_Reference (Loc, | |
02a2406d | 2251 | Prefix => New_Occurrence_Of (Typ, Loc), |
bf7f5966 | 2252 | Attribute_Name => Name_Tag); |
2253 | end if; | |
2254 | ||
76a1c25b | 2255 | Append_To (Decls, |
2256 | Make_Object_Declaration (Loc, | |
2257 | Defining_Identifier => | |
2258 | Make_Defining_Identifier (Loc, Name_uI), | |
02a2406d | 2259 | Object_Definition => |
83c6c069 | 2260 | New_Occurrence_Of (Standard_Integer, Loc), |
02a2406d | 2261 | Expression => |
725a69d2 | 2262 | Make_Function_Call (Loc, |
02a2406d | 2263 | Name => |
83c6c069 | 2264 | New_Occurrence_Of (RTE (RE_Get_Entry_Index), Loc), |
cdb1c38f | 2265 | Parameter_Associations => |
02a2406d | 2266 | New_List (Tag_Node, Make_Identifier (Loc, Name_uS))))); |
aad6babd | 2267 | |
76a1c25b | 2268 | if Ekind (Conc_Typ) = E_Protected_Type then |
aad6babd | 2269 | |
725a69d2 | 2270 | -- Generate: |
cdb1c38f | 2271 | -- Bnn : Communication_Block; |
725a69d2 | 2272 | |
ec97ce79 | 2273 | Com_Block := Make_Temporary (Loc, 'B'); |
725a69d2 | 2274 | Append_To (Decls, |
2275 | Make_Object_Declaration (Loc, | |
02a2406d | 2276 | Defining_Identifier => Com_Block, |
2277 | Object_Definition => | |
83c6c069 | 2278 | New_Occurrence_Of (RTE (RE_Communication_Block), Loc))); |
725a69d2 | 2279 | |
acf97c11 | 2280 | -- Build T._object'Access for calls below |
aad6babd | 2281 | |
acf97c11 | 2282 | Obj_Ref := |
2283 | Make_Attribute_Reference (Loc, | |
2284 | Attribute_Name => Name_Unchecked_Access, | |
2285 | Prefix => | |
2286 | Make_Selected_Component (Loc, | |
2287 | Prefix => Make_Identifier (Loc, Name_uT), | |
2288 | Selector_Name => Make_Identifier (Loc, Name_uObject))); | |
aad6babd | 2289 | |
acf97c11 | 2290 | case Corresponding_Runtime_Package (Conc_Typ) is |
2291 | when System_Tasking_Protected_Objects_Entries => | |
aad6babd | 2292 | |
acf97c11 | 2293 | -- Generate: |
2294 | -- Protected_Entry_Call | |
2295 | -- (T._object'Access, -- Object | |
2296 | -- Protected_Entry_Index! (I), -- E | |
2297 | -- P, -- Uninterpreted_Data | |
2298 | -- Asynchronous_Call, -- Mode | |
2299 | -- Bnn); -- Communication_Block | |
2300 | ||
2301 | -- where T is the protected object, I is the entry index, P | |
2302 | -- is the wrapped parameters and B is the name of the | |
2303 | -- communication block. | |
2304 | ||
2305 | Append_To (Stmts, | |
2306 | Make_Procedure_Call_Statement (Loc, | |
02a2406d | 2307 | Name => |
83c6c069 | 2308 | New_Occurrence_Of (RTE (RE_Protected_Entry_Call), Loc), |
acf97c11 | 2309 | Parameter_Associations => |
2310 | New_List ( | |
2311 | Obj_Ref, | |
aad6babd | 2312 | |
acf97c11 | 2313 | Make_Unchecked_Type_Conversion (Loc, -- entry index |
2314 | Subtype_Mark => | |
83c6c069 | 2315 | New_Occurrence_Of |
55868293 | 2316 | (RTE (RE_Protected_Entry_Index), Loc), |
acf97c11 | 2317 | Expression => Make_Identifier (Loc, Name_uI)), |
d62940bf | 2318 | |
acf97c11 | 2319 | Make_Identifier (Loc, Name_uP), -- parameter block |
83c6c069 | 2320 | New_Occurrence_Of -- Asynchronous_Call |
55868293 | 2321 | (RTE (RE_Asynchronous_Call), Loc), |
83c6c069 | 2322 | New_Occurrence_Of -- comm block |
2323 | (Com_Block, Loc)))); | |
acf97c11 | 2324 | |
acf97c11 | 2325 | when others => |
2326 | raise Program_Error; | |
2327 | end case; | |
725a69d2 | 2328 | |
2329 | -- Generate: | |
cdb1c38f | 2330 | -- B := Dummy_Communication_Block (Bnn); |
725a69d2 | 2331 | |
2332 | Append_To (Stmts, | |
2333 | Make_Assignment_Statement (Loc, | |
55868293 | 2334 | Name => Make_Identifier (Loc, Name_uB), |
725a69d2 | 2335 | Expression => |
2336 | Make_Unchecked_Type_Conversion (Loc, | |
2337 | Subtype_Mark => | |
02a2406d | 2338 | New_Occurrence_Of |
2339 | (RTE (RE_Dummy_Communication_Block), Loc), | |
2340 | Expression => New_Occurrence_Of (Com_Block, Loc)))); | |
725a69d2 | 2341 | |
a053db0d | 2342 | -- Generate: |
2343 | -- F := False; | |
2344 | ||
2345 | Append_To (Stmts, | |
2346 | Make_Assignment_Statement (Loc, | |
aabafdc2 | 2347 | Name => Make_Identifier (Loc, Name_uF), |
83c6c069 | 2348 | Expression => New_Occurrence_Of (Standard_False, Loc))); |
a053db0d | 2349 | |
76a1c25b | 2350 | else |
2351 | pragma Assert (Ekind (Conc_Typ) = E_Task_Type); | |
d62940bf | 2352 | |
76a1c25b | 2353 | -- Generate: |
cdb1c38f | 2354 | -- Task_Entry_Call |
2355 | -- (T._task_id, -- Acceptor | |
2356 | -- Task_Entry_Index! (I), -- E | |
2357 | -- P, -- Uninterpreted_Data | |
2358 | -- Asynchronous_Call, -- Mode | |
2359 | -- F); -- Rendezvous_Successful | |
ee6ba406 | 2360 | |
acf97c11 | 2361 | -- where T is the task object, I is the entry index, P is the |
76a1c25b | 2362 | -- wrapped parameters and F is the status flag. |
ee6ba406 | 2363 | |
76a1c25b | 2364 | Append_To (Stmts, |
2365 | Make_Procedure_Call_Statement (Loc, | |
02a2406d | 2366 | Name => |
83c6c069 | 2367 | New_Occurrence_Of (RTE (RE_Task_Entry_Call), Loc), |
76a1c25b | 2368 | Parameter_Associations => |
2369 | New_List ( | |
76a1c25b | 2370 | Make_Selected_Component (Loc, -- T._task_id |
55868293 | 2371 | Prefix => Make_Identifier (Loc, Name_uT), |
2372 | Selector_Name => Make_Identifier (Loc, Name_uTask_Id)), | |
ee6ba406 | 2373 | |
76a1c25b | 2374 | Make_Unchecked_Type_Conversion (Loc, -- entry index |
2375 | Subtype_Mark => | |
83c6c069 | 2376 | New_Occurrence_Of (RTE (RE_Task_Entry_Index), Loc), |
02a2406d | 2377 | Expression => Make_Identifier (Loc, Name_uI)), |
ee6ba406 | 2378 | |
76a1c25b | 2379 | Make_Identifier (Loc, Name_uP), -- parameter block |
83c6c069 | 2380 | New_Occurrence_Of -- Asynchronous_Call |
55868293 | 2381 | (RTE (RE_Asynchronous_Call), Loc), |
76a1c25b | 2382 | Make_Identifier (Loc, Name_uF)))); -- status flag |
2383 | end if; | |
7c949aad | 2384 | |
2385 | else | |
2386 | -- Ensure that the statements list is non-empty | |
2387 | ||
a053db0d | 2388 | Append_To (Stmts, |
2389 | Make_Assignment_Statement (Loc, | |
aabafdc2 | 2390 | Name => Make_Identifier (Loc, Name_uF), |
83c6c069 | 2391 | Expression => New_Occurrence_Of (Standard_False, Loc))); |
76a1c25b | 2392 | end if; |
ee6ba406 | 2393 | |
76a1c25b | 2394 | return |
2395 | Make_Subprogram_Body (Loc, | |
aabafdc2 | 2396 | Specification => |
76a1c25b | 2397 | Make_Disp_Asynchronous_Select_Spec (Typ), |
aabafdc2 | 2398 | Declarations => Decls, |
76a1c25b | 2399 | Handled_Statement_Sequence => |
2400 | Make_Handled_Sequence_Of_Statements (Loc, Stmts)); | |
2401 | end Make_Disp_Asynchronous_Select_Body; | |
ee6ba406 | 2402 | |
76a1c25b | 2403 | ---------------------------------------- |
2404 | -- Make_Disp_Asynchronous_Select_Spec -- | |
2405 | ---------------------------------------- | |
ee6ba406 | 2406 | |
76a1c25b | 2407 | function Make_Disp_Asynchronous_Select_Spec |
2408 | (Typ : Entity_Id) return Node_Id | |
2409 | is | |
2410 | Loc : constant Source_Ptr := Sloc (Typ); | |
2411 | Def_Id : constant Node_Id := | |
2412 | Make_Defining_Identifier (Loc, | |
2413 | Name_uDisp_Asynchronous_Select); | |
2414 | Params : constant List_Id := New_List; | |
ee6ba406 | 2415 | |
76a1c25b | 2416 | begin |
68f95949 | 2417 | pragma Assert (not Restriction_Active (No_Dispatching_Calls)); |
2418 | ||
725a69d2 | 2419 | -- T : in out Typ; -- Object parameter |
2420 | -- S : Integer; -- Primitive operation slot | |
2421 | -- P : Address; -- Wrapped parameters | |
2422 | -- B : out Dummy_Communication_Block; -- Communication block dummy | |
2423 | -- F : out Boolean; -- Status flag | |
ee6ba406 | 2424 | |
725a69d2 | 2425 | Append_List_To (Params, New_List ( |
2426 | ||
2427 | Make_Parameter_Specification (Loc, | |
02a2406d | 2428 | Defining_Identifier => Make_Defining_Identifier (Loc, Name_uT), |
2429 | Parameter_Type => New_Occurrence_Of (Typ, Loc), | |
2430 | In_Present => True, | |
2431 | Out_Present => True), | |
725a69d2 | 2432 | |
2433 | Make_Parameter_Specification (Loc, | |
02a2406d | 2434 | Defining_Identifier => Make_Defining_Identifier (Loc, Name_uS), |
2435 | Parameter_Type => New_Occurrence_Of (Standard_Integer, Loc)), | |
725a69d2 | 2436 | |
2437 | Make_Parameter_Specification (Loc, | |
02a2406d | 2438 | Defining_Identifier => Make_Defining_Identifier (Loc, Name_uP), |
2439 | Parameter_Type => New_Occurrence_Of (RTE (RE_Address), Loc)), | |
725a69d2 | 2440 | |
2441 | Make_Parameter_Specification (Loc, | |
02a2406d | 2442 | Defining_Identifier => Make_Defining_Identifier (Loc, Name_uB), |
2443 | Parameter_Type => | |
83c6c069 | 2444 | New_Occurrence_Of (RTE (RE_Dummy_Communication_Block), Loc), |
02a2406d | 2445 | Out_Present => True), |
ee6ba406 | 2446 | |
725a69d2 | 2447 | Make_Parameter_Specification (Loc, |
02a2406d | 2448 | Defining_Identifier => Make_Defining_Identifier (Loc, Name_uF), |
2449 | Parameter_Type => New_Occurrence_Of (Standard_Boolean, Loc), | |
2450 | Out_Present => True))); | |
7189d17f | 2451 | |
76a1c25b | 2452 | return |
725a69d2 | 2453 | Make_Procedure_Specification (Loc, |
2454 | Defining_Unit_Name => Def_Id, | |
2455 | Parameter_Specifications => Params); | |
76a1c25b | 2456 | end Make_Disp_Asynchronous_Select_Spec; |
ee6ba406 | 2457 | |
76a1c25b | 2458 | --------------------------------------- |
2459 | -- Make_Disp_Conditional_Select_Body -- | |
2460 | --------------------------------------- | |
ee6ba406 | 2461 | |
cdb1c38f | 2462 | -- For interface types, generate: |
2463 | ||
2464 | -- procedure _Disp_Conditional_Select | |
2465 | -- (T : in out <Typ>; | |
2466 | -- S : Integer; | |
2467 | -- P : System.Address; | |
2468 | -- C : out Ada.Tags.Prim_Op_Kind; | |
2469 | -- F : out Boolean) | |
2470 | -- is | |
2471 | -- begin | |
a053db0d | 2472 | -- F := False; |
2473 | -- C := Ada.Tags.POK_Function; | |
cdb1c38f | 2474 | -- end _Disp_Conditional_Select; |
2475 | ||
2476 | -- For protected types, generate: | |
2477 | ||
2478 | -- procedure _Disp_Conditional_Select | |
2479 | -- (T : in out <Typ>; | |
2480 | -- S : Integer; | |
2481 | -- P : System.Address; | |
2482 | -- C : out Ada.Tags.Prim_Op_Kind; | |
2483 | -- F : out Boolean) | |
2484 | -- is | |
2485 | -- I : Integer; | |
2486 | -- Bnn : System.Tasking.Protected_Objects.Operations. | |
2487 | -- Communication_Block; | |
2488 | ||
2489 | -- begin | |
2490 | -- C := Ada.Tags.Get_Prim_Op_Kind (Ada.Tags.Tag (<Typ>VP, S)); | |
2491 | ||
2492 | -- if C = Ada.Tags.POK_Procedure | |
2493 | -- or else C = Ada.Tags.POK_Protected_Procedure | |
2494 | -- or else C = Ada.Tags.POK_Task_Procedure | |
2495 | -- then | |
2496 | -- F := True; | |
2497 | -- return; | |
2498 | -- end if; | |
2499 | ||
2500 | -- I := Ada.Tags.Get_Entry_Index (Ada.Tags.Tag (<Typ>VP, S)); | |
2501 | -- System.Tasking.Protected_Objects.Operations.Protected_Entry_Call | |
2502 | -- (T.object'Access, | |
2503 | -- System.Tasking.Protected_Objects.Protected_Entry_Index (I), | |
2504 | -- P, | |
2505 | -- System.Tasking.Conditional_Call, | |
2506 | -- Bnn); | |
2507 | -- F := not Cancelled (Bnn); | |
2508 | -- end _Disp_Conditional_Select; | |
2509 | ||
2510 | -- For task types, generate: | |
2511 | ||
2512 | -- procedure _Disp_Conditional_Select | |
2513 | -- (T : in out <Typ>; | |
2514 | -- S : Integer; | |
2515 | -- P : System.Address; | |
2516 | -- C : out Ada.Tags.Prim_Op_Kind; | |
2517 | -- F : out Boolean) | |
2518 | -- is | |
2519 | -- I : Integer; | |
2520 | ||
2521 | -- begin | |
2522 | -- I := Ada.Tags.Get_Entry_Index (Ada.Tags.Tag (<Typ>VP, S)); | |
2523 | -- System.Tasking.Rendezvous.Task_Entry_Call | |
2524 | -- (T._task_id, | |
2525 | -- System.Tasking.Task_Entry_Index (I), | |
2526 | -- P, | |
2527 | -- System.Tasking.Conditional_Call, | |
2528 | -- F); | |
2529 | -- end _Disp_Conditional_Select; | |
2530 | ||
76a1c25b | 2531 | function Make_Disp_Conditional_Select_Body |
2532 | (Typ : Entity_Id) return Node_Id | |
2533 | is | |
2534 | Loc : constant Source_Ptr := Sloc (Typ); | |
2535 | Blk_Nam : Entity_Id; | |
2536 | Conc_Typ : Entity_Id := Empty; | |
2537 | Decls : constant List_Id := New_List; | |
acf97c11 | 2538 | Obj_Ref : Node_Id; |
76a1c25b | 2539 | Stmts : constant List_Id := New_List; |
bf7f5966 | 2540 | Tag_Node : Node_Id; |
ee6ba406 | 2541 | |
76a1c25b | 2542 | begin |
68f95949 | 2543 | pragma Assert (not Restriction_Active (No_Dispatching_Calls)); |
2544 | ||
952af0b9 | 2545 | -- Null body is generated for interface types |
2546 | ||
76a1c25b | 2547 | if Is_Interface (Typ) then |
2548 | return | |
2549 | Make_Subprogram_Body (Loc, | |
02a2406d | 2550 | Specification => |
76a1c25b | 2551 | Make_Disp_Conditional_Select_Spec (Typ), |
02a2406d | 2552 | Declarations => No_List, |
76a1c25b | 2553 | Handled_Statement_Sequence => |
2554 | Make_Handled_Sequence_Of_Statements (Loc, | |
a053db0d | 2555 | New_List (Make_Assignment_Statement (Loc, |
aabafdc2 | 2556 | Name => Make_Identifier (Loc, Name_uF), |
83c6c069 | 2557 | Expression => New_Occurrence_Of (Standard_False, Loc))))); |
76a1c25b | 2558 | end if; |
ee6ba406 | 2559 | |
952af0b9 | 2560 | if Is_Concurrent_Record_Type (Typ) then |
2561 | Conc_Typ := Corresponding_Concurrent_Type (Typ); | |
ee6ba406 | 2562 | |
76a1c25b | 2563 | -- Generate: |
2564 | -- I : Integer; | |
ee6ba406 | 2565 | |
76a1c25b | 2566 | -- where I will be used to capture the entry index of the primitive |
2567 | -- wrapper at position S. | |
ee6ba406 | 2568 | |
76a1c25b | 2569 | Append_To (Decls, |
2570 | Make_Object_Declaration (Loc, | |
02a2406d | 2571 | Defining_Identifier => Make_Defining_Identifier (Loc, Name_uI), |
2572 | Object_Definition => | |
83c6c069 | 2573 | New_Occurrence_Of (Standard_Integer, Loc))); |
ee6ba406 | 2574 | |
952af0b9 | 2575 | -- Generate: |
cdb1c38f | 2576 | -- C := Ada.Tags.Get_Prim_Op_Kind (Ada.Tags.Tag! (<type>VP), S); |
ee6ba406 | 2577 | |
952af0b9 | 2578 | -- if C = POK_Procedure |
2579 | -- or else C = POK_Protected_Procedure | |
2580 | -- or else C = POK_Task_Procedure; | |
2581 | -- then | |
2582 | -- F := True; | |
2583 | -- return; | |
2584 | -- end if; | |
aad6babd | 2585 | |
e58ae6f1 | 2586 | Build_Common_Dispatching_Select_Statements (Typ, Stmts); |
aad6babd | 2587 | |
76a1c25b | 2588 | -- Generate: |
2589 | -- Bnn : Communication_Block; | |
aad6babd | 2590 | |
cdb1c38f | 2591 | -- where Bnn is the name of the communication block used in the |
2592 | -- call to Protected_Entry_Call. | |
aad6babd | 2593 | |
ec97ce79 | 2594 | Blk_Nam := Make_Temporary (Loc, 'B'); |
76a1c25b | 2595 | Append_To (Decls, |
2596 | Make_Object_Declaration (Loc, | |
02a2406d | 2597 | Defining_Identifier => Blk_Nam, |
2598 | Object_Definition => | |
83c6c069 | 2599 | New_Occurrence_Of (RTE (RE_Communication_Block), Loc))); |
aad6babd | 2600 | |
76a1c25b | 2601 | -- Generate: |
cdb1c38f | 2602 | -- I := Ada.Tags.Get_Entry_Index (Ada.Tags.Tag! (<type>VP), S); |
aad6babd | 2603 | |
76a1c25b | 2604 | -- I is the entry index and S is the dispatch table slot |
aad6babd | 2605 | |
bf7f5966 | 2606 | if Tagged_Type_Expansion then |
2607 | Tag_Node := | |
2608 | Unchecked_Convert_To (RTE (RE_Tag), | |
83c6c069 | 2609 | New_Occurrence_Of |
bf7f5966 | 2610 | (Node (First_Elmt (Access_Disp_Table (Typ))), Loc)); |
2611 | ||
2612 | else | |
2613 | Tag_Node := | |
2614 | Make_Attribute_Reference (Loc, | |
02a2406d | 2615 | Prefix => New_Occurrence_Of (Typ, Loc), |
bf7f5966 | 2616 | Attribute_Name => Name_Tag); |
2617 | end if; | |
2618 | ||
76a1c25b | 2619 | Append_To (Stmts, |
2620 | Make_Assignment_Statement (Loc, | |
02a2406d | 2621 | Name => Make_Identifier (Loc, Name_uI), |
76a1c25b | 2622 | Expression => |
725a69d2 | 2623 | Make_Function_Call (Loc, |
02a2406d | 2624 | Name => |
83c6c069 | 2625 | New_Occurrence_Of (RTE (RE_Get_Entry_Index), Loc), |
02a2406d | 2626 | Parameter_Associations => New_List ( |
2627 | Tag_Node, | |
2628 | Make_Identifier (Loc, Name_uS))))); | |
ee6ba406 | 2629 | |
76a1c25b | 2630 | if Ekind (Conc_Typ) = E_Protected_Type then |
ee6ba406 | 2631 | |
acf97c11 | 2632 | Obj_Ref := -- T._object'Access |
2633 | Make_Attribute_Reference (Loc, | |
2634 | Attribute_Name => Name_Unchecked_Access, | |
2635 | Prefix => | |
2636 | Make_Selected_Component (Loc, | |
2637 | Prefix => Make_Identifier (Loc, Name_uT), | |
2638 | Selector_Name => Make_Identifier (Loc, Name_uObject))); | |
ee6ba406 | 2639 | |
acf97c11 | 2640 | case Corresponding_Runtime_Package (Conc_Typ) is |
2641 | when System_Tasking_Protected_Objects_Entries => | |
2642 | -- Generate: | |
e1c20931 | 2643 | |
acf97c11 | 2644 | -- Protected_Entry_Call |
2645 | -- (T._object'Access, -- Object | |
2646 | -- Protected_Entry_Index! (I), -- E | |
2647 | -- P, -- Uninterpreted_Data | |
2648 | -- Conditional_Call, -- Mode | |
2649 | -- Bnn); -- Block | |
e1c20931 | 2650 | |
acf97c11 | 2651 | -- where T is the protected object, I is the entry index, P |
2652 | -- are the wrapped parameters and Bnn is the name of the | |
2653 | -- communication block. | |
d62940bf | 2654 | |
acf97c11 | 2655 | Append_To (Stmts, |
2656 | Make_Procedure_Call_Statement (Loc, | |
02a2406d | 2657 | Name => |
83c6c069 | 2658 | New_Occurrence_Of (RTE (RE_Protected_Entry_Call), Loc), |
02a2406d | 2659 | Parameter_Associations => New_List ( |
acf97c11 | 2660 | Obj_Ref, |
d62940bf | 2661 | |
acf97c11 | 2662 | Make_Unchecked_Type_Conversion (Loc, -- entry index |
2663 | Subtype_Mark => | |
83c6c069 | 2664 | New_Occurrence_Of |
acf97c11 | 2665 | (RTE (RE_Protected_Entry_Index), Loc), |
2666 | Expression => Make_Identifier (Loc, Name_uI)), | |
2667 | ||
2668 | Make_Identifier (Loc, Name_uP), -- parameter block | |
2669 | ||
83c6c069 | 2670 | New_Occurrence_Of -- Conditional_Call |
2671 | (RTE (RE_Conditional_Call), Loc), | |
2672 | New_Occurrence_Of -- Bnn | |
2673 | (Blk_Nam, Loc)))); | |
acf97c11 | 2674 | |
2675 | when System_Tasking_Protected_Objects_Single_Entry => | |
2676 | ||
2677 | -- If we are compiling for a restricted run-time, the call | |
2678 | -- uses the simpler form. | |
2679 | ||
2680 | Append_To (Stmts, | |
2681 | Make_Procedure_Call_Statement (Loc, | |
02a2406d | 2682 | Name => |
83c6c069 | 2683 | New_Occurrence_Of |
acf97c11 | 2684 | (RTE (RE_Protected_Single_Entry_Call), Loc), |
02a2406d | 2685 | Parameter_Associations => New_List ( |
acf97c11 | 2686 | Obj_Ref, |
2687 | ||
2688 | Make_Attribute_Reference (Loc, | |
55868293 | 2689 | Prefix => Make_Identifier (Loc, Name_uP), |
acf97c11 | 2690 | Attribute_Name => Name_Address), |
2691 | ||
83c6c069 | 2692 | New_Occurrence_Of |
acf97c11 | 2693 | (RTE (RE_Conditional_Call), Loc)))); |
2694 | when others => | |
2695 | raise Program_Error; | |
2696 | end case; | |
d62940bf | 2697 | |
76a1c25b | 2698 | -- Generate: |
2699 | -- F := not Cancelled (Bnn); | |
e1c20931 | 2700 | |
76a1c25b | 2701 | -- where F is the success flag. The status of Cancelled is negated |
2702 | -- in order to match the behaviour of the version for task types. | |
e1c20931 | 2703 | |
76a1c25b | 2704 | Append_To (Stmts, |
2705 | Make_Assignment_Statement (Loc, | |
55868293 | 2706 | Name => Make_Identifier (Loc, Name_uF), |
76a1c25b | 2707 | Expression => |
2708 | Make_Op_Not (Loc, | |
2709 | Right_Opnd => | |
2710 | Make_Function_Call (Loc, | |
02a2406d | 2711 | Name => |
83c6c069 | 2712 | New_Occurrence_Of (RTE (RE_Cancelled), Loc), |
02a2406d | 2713 | Parameter_Associations => New_List ( |
83c6c069 | 2714 | New_Occurrence_Of (Blk_Nam, Loc)))))); |
76a1c25b | 2715 | else |
2716 | pragma Assert (Ekind (Conc_Typ) = E_Task_Type); | |
d62940bf | 2717 | |
76a1c25b | 2718 | -- Generate: |
cdb1c38f | 2719 | -- Task_Entry_Call |
2720 | -- (T._task_id, -- Acceptor | |
2721 | -- Task_Entry_Index! (I), -- E | |
2722 | -- P, -- Uninterpreted_Data | |
2723 | -- Conditional_Call, -- Mode | |
2724 | -- F); -- Rendezvous_Successful | |
d62940bf | 2725 | |
76a1c25b | 2726 | -- where T is the task object, I is the entry index, P are the |
2727 | -- wrapped parameters and F is the status flag. | |
e1c20931 | 2728 | |
76a1c25b | 2729 | Append_To (Stmts, |
2730 | Make_Procedure_Call_Statement (Loc, | |
02a2406d | 2731 | Name => |
83c6c069 | 2732 | New_Occurrence_Of (RTE (RE_Task_Entry_Call), Loc), |
02a2406d | 2733 | Parameter_Associations => New_List ( |
76a1c25b | 2734 | |
2735 | Make_Selected_Component (Loc, -- T._task_id | |
55868293 | 2736 | Prefix => Make_Identifier (Loc, Name_uT), |
2737 | Selector_Name => Make_Identifier (Loc, Name_uTask_Id)), | |
76a1c25b | 2738 | |
2739 | Make_Unchecked_Type_Conversion (Loc, -- entry index | |
2740 | Subtype_Mark => | |
83c6c069 | 2741 | New_Occurrence_Of (RTE (RE_Task_Entry_Index), Loc), |
55868293 | 2742 | Expression => Make_Identifier (Loc, Name_uI)), |
76a1c25b | 2743 | |
2744 | Make_Identifier (Loc, Name_uP), -- parameter block | |
83c6c069 | 2745 | New_Occurrence_Of -- Conditional_Call |
55868293 | 2746 | (RTE (RE_Conditional_Call), Loc), |
76a1c25b | 2747 | Make_Identifier (Loc, Name_uF)))); -- status flag |
d62940bf | 2748 | end if; |
7c949aad | 2749 | |
2750 | else | |
a053db0d | 2751 | -- Initialize out parameters |
7c949aad | 2752 | |
a053db0d | 2753 | Append_To (Stmts, |
2754 | Make_Assignment_Statement (Loc, | |
aabafdc2 | 2755 | Name => Make_Identifier (Loc, Name_uF), |
83c6c069 | 2756 | Expression => New_Occurrence_Of (Standard_False, Loc))); |
a053db0d | 2757 | Append_To (Stmts, |
2758 | Make_Assignment_Statement (Loc, | |
aabafdc2 | 2759 | Name => Make_Identifier (Loc, Name_uC), |
83c6c069 | 2760 | Expression => New_Occurrence_Of (RTE (RE_POK_Function), Loc))); |
76a1c25b | 2761 | end if; |
2762 | ||
2763 | return | |
2764 | Make_Subprogram_Body (Loc, | |
aabafdc2 | 2765 | Specification => |
76a1c25b | 2766 | Make_Disp_Conditional_Select_Spec (Typ), |
aabafdc2 | 2767 | Declarations => Decls, |
76a1c25b | 2768 | Handled_Statement_Sequence => |
2769 | Make_Handled_Sequence_Of_Statements (Loc, Stmts)); | |
2770 | end Make_Disp_Conditional_Select_Body; | |
2771 | ||
2772 | --------------------------------------- | |
2773 | -- Make_Disp_Conditional_Select_Spec -- | |
2774 | --------------------------------------- | |
2775 | ||
2776 | function Make_Disp_Conditional_Select_Spec | |
2777 | (Typ : Entity_Id) return Node_Id | |
2778 | is | |
2779 | Loc : constant Source_Ptr := Sloc (Typ); | |
2780 | Def_Id : constant Node_Id := | |
2781 | Make_Defining_Identifier (Loc, | |
2782 | Name_uDisp_Conditional_Select); | |
2783 | Params : constant List_Id := New_List; | |
2784 | ||
2785 | begin | |
68f95949 | 2786 | pragma Assert (not Restriction_Active (No_Dispatching_Calls)); |
2787 | ||
725a69d2 | 2788 | -- T : in out Typ; -- Object parameter |
2789 | -- S : Integer; -- Primitive operation slot | |
2790 | -- P : Address; -- Wrapped parameters | |
2791 | -- C : out Prim_Op_Kind; -- Call kind | |
2792 | -- F : out Boolean; -- Status flag | |
2793 | ||
2794 | Append_List_To (Params, New_List ( | |
2795 | ||
2796 | Make_Parameter_Specification (Loc, | |
02a2406d | 2797 | Defining_Identifier => Make_Defining_Identifier (Loc, Name_uT), |
2798 | Parameter_Type => New_Occurrence_Of (Typ, Loc), | |
2799 | In_Present => True, | |
2800 | Out_Present => True), | |
725a69d2 | 2801 | |
2802 | Make_Parameter_Specification (Loc, | |
02a2406d | 2803 | Defining_Identifier => Make_Defining_Identifier (Loc, Name_uS), |
2804 | Parameter_Type => New_Occurrence_Of (Standard_Integer, Loc)), | |
725a69d2 | 2805 | |
2806 | Make_Parameter_Specification (Loc, | |
02a2406d | 2807 | Defining_Identifier => Make_Defining_Identifier (Loc, Name_uP), |
2808 | Parameter_Type => New_Occurrence_Of (RTE (RE_Address), Loc)), | |
76a1c25b | 2809 | |
725a69d2 | 2810 | Make_Parameter_Specification (Loc, |
02a2406d | 2811 | Defining_Identifier => Make_Defining_Identifier (Loc, Name_uC), |
2812 | Parameter_Type => | |
83c6c069 | 2813 | New_Occurrence_Of (RTE (RE_Prim_Op_Kind), Loc), |
02a2406d | 2814 | Out_Present => True), |
76a1c25b | 2815 | |
725a69d2 | 2816 | Make_Parameter_Specification (Loc, |
02a2406d | 2817 | Defining_Identifier => Make_Defining_Identifier (Loc, Name_uF), |
2818 | Parameter_Type => New_Occurrence_Of (Standard_Boolean, Loc), | |
2819 | Out_Present => True))); | |
76a1c25b | 2820 | |
2821 | return | |
2822 | Make_Procedure_Specification (Loc, | |
2823 | Defining_Unit_Name => Def_Id, | |
2824 | Parameter_Specifications => Params); | |
2825 | end Make_Disp_Conditional_Select_Spec; | |
2826 | ||
2827 | ------------------------------------- | |
2828 | -- Make_Disp_Get_Prim_Op_Kind_Body -- | |
2829 | ------------------------------------- | |
2830 | ||
02a2406d | 2831 | function Make_Disp_Get_Prim_Op_Kind_Body (Typ : Entity_Id) return Node_Id is |
bf7f5966 | 2832 | Loc : constant Source_Ptr := Sloc (Typ); |
2833 | Tag_Node : Node_Id; | |
76a1c25b | 2834 | |
2835 | begin | |
68f95949 | 2836 | pragma Assert (not Restriction_Active (No_Dispatching_Calls)); |
2837 | ||
76a1c25b | 2838 | if Is_Interface (Typ) then |
2839 | return | |
2840 | Make_Subprogram_Body (Loc, | |
02a2406d | 2841 | Specification => |
76a1c25b | 2842 | Make_Disp_Get_Prim_Op_Kind_Spec (Typ), |
02a2406d | 2843 | Declarations => New_List, |
76a1c25b | 2844 | Handled_Statement_Sequence => |
2845 | Make_Handled_Sequence_Of_Statements (Loc, | |
2846 | New_List (Make_Null_Statement (Loc)))); | |
e1c20931 | 2847 | end if; |
2848 | ||
d62940bf | 2849 | -- Generate: |
76a1c25b | 2850 | -- C := get_prim_op_kind (tag! (<type>VP), S); |
ee6ba406 | 2851 | |
76a1c25b | 2852 | -- where C is the out parameter capturing the call kind and S is the |
2853 | -- dispatch table slot number. | |
ee6ba406 | 2854 | |
bf7f5966 | 2855 | if Tagged_Type_Expansion then |
2856 | Tag_Node := | |
2857 | Unchecked_Convert_To (RTE (RE_Tag), | |
83c6c069 | 2858 | New_Occurrence_Of |
bf7f5966 | 2859 | (Node (First_Elmt (Access_Disp_Table (Typ))), Loc)); |
2860 | ||
2861 | else | |
2862 | Tag_Node := | |
2863 | Make_Attribute_Reference (Loc, | |
02a2406d | 2864 | Prefix => New_Occurrence_Of (Typ, Loc), |
bf7f5966 | 2865 | Attribute_Name => Name_Tag); |
2866 | end if; | |
2867 | ||
76a1c25b | 2868 | return |
2869 | Make_Subprogram_Body (Loc, | |
02a2406d | 2870 | Specification => |
76a1c25b | 2871 | Make_Disp_Get_Prim_Op_Kind_Spec (Typ), |
02a2406d | 2872 | Declarations => New_List, |
76a1c25b | 2873 | Handled_Statement_Sequence => |
2874 | Make_Handled_Sequence_Of_Statements (Loc, | |
2875 | New_List ( | |
2876 | Make_Assignment_Statement (Loc, | |
02a2406d | 2877 | Name => Make_Identifier (Loc, Name_uC), |
76a1c25b | 2878 | Expression => |
725a69d2 | 2879 | Make_Function_Call (Loc, |
2880 | Name => | |
83c6c069 | 2881 | New_Occurrence_Of (RTE (RE_Get_Prim_Op_Kind), Loc), |
725a69d2 | 2882 | Parameter_Associations => New_List ( |
bf7f5966 | 2883 | Tag_Node, |
2884 | Make_Identifier (Loc, Name_uS))))))); | |
76a1c25b | 2885 | end Make_Disp_Get_Prim_Op_Kind_Body; |
e1c20931 | 2886 | |
76a1c25b | 2887 | ------------------------------------- |
2888 | -- Make_Disp_Get_Prim_Op_Kind_Spec -- | |
2889 | ------------------------------------- | |
e1c20931 | 2890 | |
76a1c25b | 2891 | function Make_Disp_Get_Prim_Op_Kind_Spec |
2892 | (Typ : Entity_Id) return Node_Id | |
2893 | is | |
2894 | Loc : constant Source_Ptr := Sloc (Typ); | |
2895 | Def_Id : constant Node_Id := | |
02a2406d | 2896 | Make_Defining_Identifier (Loc, Name_uDisp_Get_Prim_Op_Kind); |
76a1c25b | 2897 | Params : constant List_Id := New_List; |
e1c20931 | 2898 | |
76a1c25b | 2899 | begin |
68f95949 | 2900 | pragma Assert (not Restriction_Active (No_Dispatching_Calls)); |
2901 | ||
725a69d2 | 2902 | -- T : in out Typ; -- Object parameter |
2903 | -- S : Integer; -- Primitive operation slot | |
2904 | -- C : out Prim_Op_Kind; -- Call kind | |
2905 | ||
2906 | Append_List_To (Params, New_List ( | |
2907 | ||
2908 | Make_Parameter_Specification (Loc, | |
02a2406d | 2909 | Defining_Identifier => Make_Defining_Identifier (Loc, Name_uT), |
2910 | Parameter_Type => New_Occurrence_Of (Typ, Loc), | |
2911 | In_Present => True, | |
2912 | Out_Present => True), | |
ee6ba406 | 2913 | |
725a69d2 | 2914 | Make_Parameter_Specification (Loc, |
02a2406d | 2915 | Defining_Identifier => Make_Defining_Identifier (Loc, Name_uS), |
2916 | Parameter_Type => New_Occurrence_Of (Standard_Integer, Loc)), | |
ee6ba406 | 2917 | |
725a69d2 | 2918 | Make_Parameter_Specification (Loc, |
02a2406d | 2919 | Defining_Identifier => Make_Defining_Identifier (Loc, Name_uC), |
2920 | Parameter_Type => | |
83c6c069 | 2921 | New_Occurrence_Of (RTE (RE_Prim_Op_Kind), Loc), |
02a2406d | 2922 | Out_Present => True))); |
76a1c25b | 2923 | |
2924 | return | |
2925 | Make_Procedure_Specification (Loc, | |
2926 | Defining_Unit_Name => Def_Id, | |
2927 | Parameter_Specifications => Params); | |
2928 | end Make_Disp_Get_Prim_Op_Kind_Spec; | |
2929 | ||
2930 | -------------------------------- | |
2931 | -- Make_Disp_Get_Task_Id_Body -- | |
2932 | -------------------------------- | |
2933 | ||
2934 | function Make_Disp_Get_Task_Id_Body | |
2935 | (Typ : Entity_Id) return Node_Id | |
2936 | is | |
2937 | Loc : constant Source_Ptr := Sloc (Typ); | |
2938 | Ret : Node_Id; | |
2939 | ||
2940 | begin | |
68f95949 | 2941 | pragma Assert (not Restriction_Active (No_Dispatching_Calls)); |
2942 | ||
76a1c25b | 2943 | if Is_Concurrent_Record_Type (Typ) |
2944 | and then Ekind (Corresponding_Concurrent_Type (Typ)) = E_Task_Type | |
2945 | then | |
725a69d2 | 2946 | -- Generate: |
2947 | -- return To_Address (_T._task_id); | |
2948 | ||
76a1c25b | 2949 | Ret := |
17e14451 | 2950 | Make_Simple_Return_Statement (Loc, |
76a1c25b | 2951 | Expression => |
725a69d2 | 2952 | Make_Unchecked_Type_Conversion (Loc, |
02a2406d | 2953 | Subtype_Mark => New_Occurrence_Of (RTE (RE_Address), Loc), |
2954 | Expression => | |
725a69d2 | 2955 | Make_Selected_Component (Loc, |
55868293 | 2956 | Prefix => Make_Identifier (Loc, Name_uT), |
2957 | Selector_Name => Make_Identifier (Loc, Name_uTask_Id)))); | |
76a1c25b | 2958 | |
2959 | -- A null body is constructed for non-task types | |
2960 | ||
2961 | else | |
725a69d2 | 2962 | -- Generate: |
2963 | -- return Null_Address; | |
2964 | ||
76a1c25b | 2965 | Ret := |
17e14451 | 2966 | Make_Simple_Return_Statement (Loc, |
02a2406d | 2967 | Expression => New_Occurrence_Of (RTE (RE_Null_Address), Loc)); |
76a1c25b | 2968 | end if; |
2969 | ||
2970 | return | |
2971 | Make_Subprogram_Body (Loc, | |
02a2406d | 2972 | Specification => Make_Disp_Get_Task_Id_Spec (Typ), |
2973 | Declarations => New_List, | |
76a1c25b | 2974 | Handled_Statement_Sequence => |
02a2406d | 2975 | Make_Handled_Sequence_Of_Statements (Loc, New_List (Ret))); |
76a1c25b | 2976 | end Make_Disp_Get_Task_Id_Body; |
2977 | ||
2978 | -------------------------------- | |
2979 | -- Make_Disp_Get_Task_Id_Spec -- | |
2980 | -------------------------------- | |
2981 | ||
2982 | function Make_Disp_Get_Task_Id_Spec | |
2983 | (Typ : Entity_Id) return Node_Id | |
2984 | is | |
725a69d2 | 2985 | Loc : constant Source_Ptr := Sloc (Typ); |
76a1c25b | 2986 | |
2987 | begin | |
68f95949 | 2988 | pragma Assert (not Restriction_Active (No_Dispatching_Calls)); |
2989 | ||
76a1c25b | 2990 | return |
2991 | Make_Function_Specification (Loc, | |
02a2406d | 2992 | Defining_Unit_Name => |
725a69d2 | 2993 | Make_Defining_Identifier (Loc, Name_uDisp_Get_Task_Id), |
76a1c25b | 2994 | Parameter_Specifications => New_List ( |
2995 | Make_Parameter_Specification (Loc, | |
02a2406d | 2996 | Defining_Identifier => Make_Defining_Identifier (Loc, Name_uT), |
2997 | Parameter_Type => New_Occurrence_Of (Typ, Loc))), | |
2998 | Result_Definition => | |
83c6c069 | 2999 | New_Occurrence_Of (RTE (RE_Address), Loc)); |
76a1c25b | 3000 | end Make_Disp_Get_Task_Id_Spec; |
3001 | ||
cdb1c38f | 3002 | ---------------------------- |
3003 | -- Make_Disp_Requeue_Body -- | |
3004 | ---------------------------- | |
3005 | ||
3006 | function Make_Disp_Requeue_Body | |
3007 | (Typ : Entity_Id) return Node_Id | |
3008 | is | |
3009 | Loc : constant Source_Ptr := Sloc (Typ); | |
3010 | Conc_Typ : Entity_Id := Empty; | |
3011 | Stmts : constant List_Id := New_List; | |
3012 | ||
3013 | begin | |
3014 | pragma Assert (not Restriction_Active (No_Dispatching_Calls)); | |
3015 | ||
3016 | -- Null body is generated for interface types and non-concurrent | |
3017 | -- tagged types. | |
3018 | ||
3019 | if Is_Interface (Typ) | |
3020 | or else not Is_Concurrent_Record_Type (Typ) | |
3021 | then | |
3022 | return | |
3023 | Make_Subprogram_Body (Loc, | |
02a2406d | 3024 | Specification => Make_Disp_Requeue_Spec (Typ), |
3025 | Declarations => No_List, | |
cdb1c38f | 3026 | Handled_Statement_Sequence => |
3027 | Make_Handled_Sequence_Of_Statements (Loc, | |
3028 | New_List (Make_Null_Statement (Loc)))); | |
3029 | end if; | |
3030 | ||
3031 | Conc_Typ := Corresponding_Concurrent_Type (Typ); | |
3032 | ||
3033 | if Ekind (Conc_Typ) = E_Protected_Type then | |
3034 | ||
3035 | -- Generate statements: | |
3036 | -- if F then | |
3037 | -- System.Tasking.Protected_Objects.Operations. | |
3038 | -- Requeue_Protected_Entry | |
3039 | -- (Protection_Entries_Access (P), | |
3040 | -- O._object'Unchecked_Access, | |
3041 | -- Protected_Entry_Index (I), | |
3042 | -- A); | |
3043 | -- else | |
3044 | -- System.Tasking.Protected_Objects.Operations. | |
3045 | -- Requeue_Task_To_Protected_Entry | |
3046 | -- (O._object'Unchecked_Access, | |
3047 | -- Protected_Entry_Index (I), | |
3048 | -- A); | |
3049 | -- end if; | |
3050 | ||
acf97c11 | 3051 | if Restriction_Active (No_Entry_Queue) then |
3052 | Append_To (Stmts, Make_Null_Statement (Loc)); | |
3053 | else | |
3054 | Append_To (Stmts, | |
3055 | Make_If_Statement (Loc, | |
55868293 | 3056 | Condition => Make_Identifier (Loc, Name_uF), |
cdb1c38f | 3057 | |
acf97c11 | 3058 | Then_Statements => |
3059 | New_List ( | |
cdb1c38f | 3060 | |
acf97c11 | 3061 | -- Call to Requeue_Protected_Entry |
cdb1c38f | 3062 | |
acf97c11 | 3063 | Make_Procedure_Call_Statement (Loc, |
3064 | Name => | |
02a2406d | 3065 | New_Occurrence_Of |
3066 | (RTE (RE_Requeue_Protected_Entry), Loc), | |
acf97c11 | 3067 | Parameter_Associations => |
3068 | New_List ( | |
3069 | ||
3070 | Make_Unchecked_Type_Conversion (Loc, -- PEA (P) | |
3071 | Subtype_Mark => | |
83c6c069 | 3072 | New_Occurrence_Of ( |
acf97c11 | 3073 | RTE (RE_Protection_Entries_Access), Loc), |
3074 | Expression => | |
3075 | Make_Identifier (Loc, Name_uP)), | |
3076 | ||
3077 | Make_Attribute_Reference (Loc, -- O._object'Acc | |
3078 | Attribute_Name => | |
3079 | Name_Unchecked_Access, | |
02a2406d | 3080 | Prefix => |
acf97c11 | 3081 | Make_Selected_Component (Loc, |
55868293 | 3082 | Prefix => |
acf97c11 | 3083 | Make_Identifier (Loc, Name_uO), |
3084 | Selector_Name => | |
3085 | Make_Identifier (Loc, Name_uObject))), | |
3086 | ||
3087 | Make_Unchecked_Type_Conversion (Loc, -- entry index | |
3088 | Subtype_Mark => | |
02a2406d | 3089 | New_Occurrence_Of |
3090 | (RTE (RE_Protected_Entry_Index), Loc), | |
55868293 | 3091 | Expression => Make_Identifier (Loc, Name_uI)), |
cdb1c38f | 3092 | |
acf97c11 | 3093 | Make_Identifier (Loc, Name_uA)))), -- abort status |
cdb1c38f | 3094 | |
acf97c11 | 3095 | Else_Statements => |
3096 | New_List ( | |
cdb1c38f | 3097 | |
acf97c11 | 3098 | -- Call to Requeue_Task_To_Protected_Entry |
cdb1c38f | 3099 | |
acf97c11 | 3100 | Make_Procedure_Call_Statement (Loc, |
3101 | Name => | |
02a2406d | 3102 | New_Occurrence_Of |
3103 | (RTE (RE_Requeue_Task_To_Protected_Entry), Loc), | |
acf97c11 | 3104 | Parameter_Associations => |
3105 | New_List ( | |
3106 | ||
3107 | Make_Attribute_Reference (Loc, -- O._object'Acc | |
02a2406d | 3108 | Attribute_Name => Name_Unchecked_Access, |
3109 | Prefix => | |
acf97c11 | 3110 | Make_Selected_Component (Loc, |
02a2406d | 3111 | Prefix => |
acf97c11 | 3112 | Make_Identifier (Loc, Name_uO), |
3113 | Selector_Name => | |
3114 | Make_Identifier (Loc, Name_uObject))), | |
3115 | ||
3116 | Make_Unchecked_Type_Conversion (Loc, -- entry index | |
3117 | Subtype_Mark => | |
02a2406d | 3118 | New_Occurrence_Of |
3119 | (RTE (RE_Protected_Entry_Index), Loc), | |
3120 | Expression => Make_Identifier (Loc, Name_uI)), | |
cdb1c38f | 3121 | |
acf97c11 | 3122 | Make_Identifier (Loc, Name_uA)))))); -- abort status |
3123 | end if; | |
02a2406d | 3124 | |
cdb1c38f | 3125 | else |
3126 | pragma Assert (Is_Task_Type (Conc_Typ)); | |
3127 | ||
3128 | -- Generate: | |
3129 | -- if F then | |
3130 | -- System.Tasking.Rendezvous.Requeue_Protected_To_Task_Entry | |
3131 | -- (Protection_Entries_Access (P), | |
3132 | -- O._task_id, | |
3133 | -- Task_Entry_Index (I), | |
3134 | -- A); | |
3135 | -- else | |
3136 | -- System.Tasking.Rendezvous.Requeue_Task_Entry | |
3137 | -- (O._task_id, | |
3138 | -- Task_Entry_Index (I), | |
3139 | -- A); | |
3140 | -- end if; | |
3141 | ||
3142 | Append_To (Stmts, | |
3143 | Make_If_Statement (Loc, | |
55868293 | 3144 | Condition => Make_Identifier (Loc, Name_uF), |
cdb1c38f | 3145 | |
55868293 | 3146 | Then_Statements => New_List ( |
cdb1c38f | 3147 | |
55868293 | 3148 | -- Call to Requeue_Protected_To_Task_Entry |
cdb1c38f | 3149 | |
55868293 | 3150 | Make_Procedure_Call_Statement (Loc, |
3151 | Name => | |
83c6c069 | 3152 | New_Occurrence_Of |
55868293 | 3153 | (RTE (RE_Requeue_Protected_To_Task_Entry), Loc), |
cdb1c38f | 3154 | |
55868293 | 3155 | Parameter_Associations => New_List ( |
cdb1c38f | 3156 | |
55868293 | 3157 | Make_Unchecked_Type_Conversion (Loc, -- PEA (P) |
3158 | Subtype_Mark => | |
83c6c069 | 3159 | New_Occurrence_Of |
55868293 | 3160 | (RTE (RE_Protection_Entries_Access), Loc), |
3161 | Expression => Make_Identifier (Loc, Name_uP)), | |
cdb1c38f | 3162 | |
55868293 | 3163 | Make_Selected_Component (Loc, -- O._task_id |
3164 | Prefix => Make_Identifier (Loc, Name_uO), | |
3165 | Selector_Name => Make_Identifier (Loc, Name_uTask_Id)), | |
cdb1c38f | 3166 | |
55868293 | 3167 | Make_Unchecked_Type_Conversion (Loc, -- entry index |
3168 | Subtype_Mark => | |
83c6c069 | 3169 | New_Occurrence_Of (RTE (RE_Task_Entry_Index), Loc), |
55868293 | 3170 | Expression => Make_Identifier (Loc, Name_uI)), |
cdb1c38f | 3171 | |
55868293 | 3172 | Make_Identifier (Loc, Name_uA)))), -- abort status |
cdb1c38f | 3173 | |
55868293 | 3174 | Else_Statements => New_List ( |
cdb1c38f | 3175 | |
55868293 | 3176 | -- Call to Requeue_Task_Entry |
cdb1c38f | 3177 | |
55868293 | 3178 | Make_Procedure_Call_Statement (Loc, |
02a2406d | 3179 | Name => |
3180 | New_Occurrence_Of (RTE (RE_Requeue_Task_Entry), Loc), | |
cdb1c38f | 3181 | |
55868293 | 3182 | Parameter_Associations => New_List ( |
cdb1c38f | 3183 | |
55868293 | 3184 | Make_Selected_Component (Loc, -- O._task_id |
3185 | Prefix => Make_Identifier (Loc, Name_uO), | |
3186 | Selector_Name => Make_Identifier (Loc, Name_uTask_Id)), | |
cdb1c38f | 3187 | |
55868293 | 3188 | Make_Unchecked_Type_Conversion (Loc, -- entry index |
3189 | Subtype_Mark => | |
83c6c069 | 3190 | New_Occurrence_Of (RTE (RE_Task_Entry_Index), Loc), |
55868293 | 3191 | Expression => Make_Identifier (Loc, Name_uI)), |
cdb1c38f | 3192 | |
55868293 | 3193 | Make_Identifier (Loc, Name_uA)))))); -- abort status |
cdb1c38f | 3194 | end if; |
3195 | ||
3196 | -- Even though no declarations are needed in both cases, we allocate | |
3197 | -- a list for entities added by Freeze. | |
3198 | ||
3199 | return | |
3200 | Make_Subprogram_Body (Loc, | |
02a2406d | 3201 | Specification => Make_Disp_Requeue_Spec (Typ), |
3202 | Declarations => New_List, | |
cdb1c38f | 3203 | Handled_Statement_Sequence => |
3204 | Make_Handled_Sequence_Of_Statements (Loc, Stmts)); | |
3205 | end Make_Disp_Requeue_Body; | |
3206 | ||
3207 | ---------------------------- | |
3208 | -- Make_Disp_Requeue_Spec -- | |
3209 | ---------------------------- | |
3210 | ||
3211 | function Make_Disp_Requeue_Spec | |
3212 | (Typ : Entity_Id) return Node_Id | |
3213 | is | |
3214 | Loc : constant Source_Ptr := Sloc (Typ); | |
3215 | ||
3216 | begin | |
3217 | pragma Assert (not Restriction_Active (No_Dispatching_Calls)); | |
3218 | ||
3219 | -- O : in out Typ; - Object parameter | |
3220 | -- F : Boolean; - Protected (True) / task (False) flag | |
3221 | -- P : Address; - Protection_Entries_Access value | |
3222 | -- I : Entry_Index - Index of entry call | |
3223 | -- A : Boolean - Abort flag | |
3224 | ||
3225 | -- Note that the Protection_Entries_Access value is represented as a | |
3226 | -- System.Address in order to avoid dragging in the tasking runtime | |
3227 | -- when compiling sources without tasking constructs. | |
3228 | ||
3229 | return | |
3230 | Make_Procedure_Specification (Loc, | |
3231 | Defining_Unit_Name => | |
3232 | Make_Defining_Identifier (Loc, Name_uDisp_Requeue), | |
3233 | ||
02a2406d | 3234 | Parameter_Specifications => New_List ( |
cdb1c38f | 3235 | |
3236 | Make_Parameter_Specification (Loc, -- O | |
3237 | Defining_Identifier => | |
3238 | Make_Defining_Identifier (Loc, Name_uO), | |
02a2406d | 3239 | Parameter_Type => |
83c6c069 | 3240 | New_Occurrence_Of (Typ, Loc), |
02a2406d | 3241 | In_Present => True, |
3242 | Out_Present => True), | |
cdb1c38f | 3243 | |
3244 | Make_Parameter_Specification (Loc, -- F | |
3245 | Defining_Identifier => | |
3246 | Make_Defining_Identifier (Loc, Name_uF), | |
02a2406d | 3247 | Parameter_Type => |
83c6c069 | 3248 | New_Occurrence_Of (Standard_Boolean, Loc)), |
cdb1c38f | 3249 | |
3250 | Make_Parameter_Specification (Loc, -- P | |
3251 | Defining_Identifier => | |
3252 | Make_Defining_Identifier (Loc, Name_uP), | |
02a2406d | 3253 | Parameter_Type => |
83c6c069 | 3254 | New_Occurrence_Of (RTE (RE_Address), Loc)), |
cdb1c38f | 3255 | |
3256 | Make_Parameter_Specification (Loc, -- I | |
3257 | Defining_Identifier => | |
3258 | Make_Defining_Identifier (Loc, Name_uI), | |
02a2406d | 3259 | Parameter_Type => |
83c6c069 | 3260 | New_Occurrence_Of (Standard_Integer, Loc)), |
cdb1c38f | 3261 | |
3262 | Make_Parameter_Specification (Loc, -- A | |
3263 | Defining_Identifier => | |
3264 | Make_Defining_Identifier (Loc, Name_uA), | |
02a2406d | 3265 | Parameter_Type => |
83c6c069 | 3266 | New_Occurrence_Of (Standard_Boolean, Loc)))); |
cdb1c38f | 3267 | end Make_Disp_Requeue_Spec; |
3268 | ||
76a1c25b | 3269 | --------------------------------- |
3270 | -- Make_Disp_Timed_Select_Body -- | |
3271 | --------------------------------- | |
3272 | ||
cdb1c38f | 3273 | -- For interface types, generate: |
3274 | ||
3275 | -- procedure _Disp_Timed_Select | |
3276 | -- (T : in out <Typ>; | |
3277 | -- S : Integer; | |
3278 | -- P : System.Address; | |
3279 | -- D : Duration; | |
3280 | -- M : Integer; | |
3281 | -- C : out Ada.Tags.Prim_Op_Kind; | |
3282 | -- F : out Boolean) | |
3283 | -- is | |
3284 | -- begin | |
a053db0d | 3285 | -- F := False; |
3286 | -- C := Ada.Tags.POK_Function; | |
cdb1c38f | 3287 | -- end _Disp_Timed_Select; |
3288 | ||
3289 | -- For protected types, generate: | |
3290 | ||
3291 | -- procedure _Disp_Timed_Select | |
3292 | -- (T : in out <Typ>; | |
3293 | -- S : Integer; | |
3294 | -- P : System.Address; | |
3295 | -- D : Duration; | |
3296 | -- M : Integer; | |
3297 | -- C : out Ada.Tags.Prim_Op_Kind; | |
3298 | -- F : out Boolean) | |
3299 | -- is | |
3300 | -- I : Integer; | |
3301 | ||
3302 | -- begin | |
3303 | -- C := Ada.Tags.Get_Prim_Op_Kind (Ada.Tags.Tag (<Typ>VP), S); | |
3304 | ||
3305 | -- if C = Ada.Tags.POK_Procedure | |
3306 | -- or else C = Ada.Tags.POK_Protected_Procedure | |
3307 | -- or else C = Ada.Tags.POK_Task_Procedure | |
3308 | -- then | |
3309 | -- F := True; | |
3310 | -- return; | |
3311 | -- end if; | |
3312 | ||
3313 | -- I := Ada.Tags.Get_Entry_Index (Ada.Tags.Tag (<Typ>VP), S); | |
3314 | -- System.Tasking.Protected_Objects.Operations. | |
3315 | -- Timed_Protected_Entry_Call | |
3316 | -- (T._object'Access, | |
3317 | -- System.Tasking.Protected_Objects.Protected_Entry_Index (I), | |
3318 | -- P, | |
3319 | -- D, | |
3320 | -- M, | |
3321 | -- F); | |
3322 | -- end _Disp_Timed_Select; | |
3323 | ||
3324 | -- For task types, generate: | |
3325 | ||
3326 | -- procedure _Disp_Timed_Select | |
3327 | -- (T : in out <Typ>; | |
3328 | -- S : Integer; | |
3329 | -- P : System.Address; | |
3330 | -- D : Duration; | |
3331 | -- M : Integer; | |
3332 | -- C : out Ada.Tags.Prim_Op_Kind; | |
3333 | -- F : out Boolean) | |
3334 | -- is | |
3335 | -- I : Integer; | |
3336 | ||
3337 | -- begin | |
3338 | -- I := Ada.Tags.Get_Entry_Index (Ada.Tags.Tag (<Typ>VP), S); | |
3339 | -- System.Tasking.Rendezvous.Timed_Task_Entry_Call | |
3340 | -- (T._task_id, | |
3341 | -- System.Tasking.Task_Entry_Index (I), | |
3342 | -- P, | |
3343 | -- D, | |
3344 | -- M, | |
a053db0d | 3345 | -- F); |
cdb1c38f | 3346 | -- end _Disp_Time_Select; |
3347 | ||
76a1c25b | 3348 | function Make_Disp_Timed_Select_Body |
3349 | (Typ : Entity_Id) return Node_Id | |
3350 | is | |
3351 | Loc : constant Source_Ptr := Sloc (Typ); | |
3352 | Conc_Typ : Entity_Id := Empty; | |
3353 | Decls : constant List_Id := New_List; | |
acf97c11 | 3354 | Obj_Ref : Node_Id; |
76a1c25b | 3355 | Stmts : constant List_Id := New_List; |
bf7f5966 | 3356 | Tag_Node : Node_Id; |
76a1c25b | 3357 | |
3358 | begin | |
68f95949 | 3359 | pragma Assert (not Restriction_Active (No_Dispatching_Calls)); |
3360 | ||
952af0b9 | 3361 | -- Null body is generated for interface types |
3362 | ||
76a1c25b | 3363 | if Is_Interface (Typ) then |
3364 | return | |
3365 | Make_Subprogram_Body (Loc, | |
02a2406d | 3366 | Specification => Make_Disp_Timed_Select_Spec (Typ), |
3367 | Declarations => New_List, | |
76a1c25b | 3368 | Handled_Statement_Sequence => |
3369 | Make_Handled_Sequence_Of_Statements (Loc, | |
aabafdc2 | 3370 | New_List ( |
3371 | Make_Assignment_Statement (Loc, | |
3372 | Name => Make_Identifier (Loc, Name_uF), | |
83c6c069 | 3373 | Expression => New_Occurrence_Of (Standard_False, Loc))))); |
76a1c25b | 3374 | end if; |
3375 | ||
952af0b9 | 3376 | if Is_Concurrent_Record_Type (Typ) then |
3377 | Conc_Typ := Corresponding_Concurrent_Type (Typ); | |
76a1c25b | 3378 | |
3379 | -- Generate: | |
3380 | -- I : Integer; | |
3381 | ||
3382 | -- where I will be used to capture the entry index of the primitive | |
3383 | -- wrapper at position S. | |
3384 | ||
3385 | Append_To (Decls, | |
3386 | Make_Object_Declaration (Loc, | |
aabafdc2 | 3387 | Defining_Identifier => Make_Defining_Identifier (Loc, Name_uI), |
83c6c069 | 3388 | Object_Definition => |
3389 | New_Occurrence_Of (Standard_Integer, Loc))); | |
76a1c25b | 3390 | |
952af0b9 | 3391 | -- Generate: |
3392 | -- C := Get_Prim_Op_Kind (tag! (<type>VP), S); | |
76a1c25b | 3393 | |
952af0b9 | 3394 | -- if C = POK_Procedure |
3395 | -- or else C = POK_Protected_Procedure | |
3396 | -- or else C = POK_Task_Procedure; | |
3397 | -- then | |
3398 | -- F := True; | |
3399 | -- return; | |
3400 | -- end if; | |
76a1c25b | 3401 | |
e58ae6f1 | 3402 | Build_Common_Dispatching_Select_Statements (Typ, Stmts); |
76a1c25b | 3403 | |
3404 | -- Generate: | |
952af0b9 | 3405 | -- I := Get_Entry_Index (tag! (<type>VP), S); |
76a1c25b | 3406 | |
3407 | -- I is the entry index and S is the dispatch table slot | |
3408 | ||
bf7f5966 | 3409 | if Tagged_Type_Expansion then |
3410 | Tag_Node := | |
3411 | Unchecked_Convert_To (RTE (RE_Tag), | |
83c6c069 | 3412 | New_Occurrence_Of |
bf7f5966 | 3413 | (Node (First_Elmt (Access_Disp_Table (Typ))), Loc)); |
3414 | ||
3415 | else | |
3416 | Tag_Node := | |
3417 | Make_Attribute_Reference (Loc, | |
83c6c069 | 3418 | Prefix => New_Occurrence_Of (Typ, Loc), |
bf7f5966 | 3419 | Attribute_Name => Name_Tag); |
3420 | end if; | |
3421 | ||
76a1c25b | 3422 | Append_To (Stmts, |
3423 | Make_Assignment_Statement (Loc, | |
55868293 | 3424 | Name => Make_Identifier (Loc, Name_uI), |
76a1c25b | 3425 | Expression => |
725a69d2 | 3426 | Make_Function_Call (Loc, |
83c6c069 | 3427 | Name => New_Occurrence_Of (RTE (RE_Get_Entry_Index), Loc), |
02a2406d | 3428 | Parameter_Associations => New_List ( |
3429 | Tag_Node, | |
3430 | Make_Identifier (Loc, Name_uS))))); | |
76a1c25b | 3431 | |
acf97c11 | 3432 | -- Protected case |
3433 | ||
76a1c25b | 3434 | if Ekind (Conc_Typ) = E_Protected_Type then |
3435 | ||
acf97c11 | 3436 | -- Build T._object'Access |
3437 | ||
3438 | Obj_Ref := | |
3439 | Make_Attribute_Reference (Loc, | |
3440 | Attribute_Name => Name_Unchecked_Access, | |
3441 | Prefix => | |
3442 | Make_Selected_Component (Loc, | |
3443 | Prefix => Make_Identifier (Loc, Name_uT), | |
3444 | Selector_Name => Make_Identifier (Loc, Name_uObject))); | |
3445 | ||
3446 | -- Normal case, No_Entry_Queue restriction not active. In this | |
3447 | -- case we generate: | |
3448 | ||
3449 | -- Timed_Protected_Entry_Call | |
3450 | -- (T._object'access, | |
cdb1c38f | 3451 | -- Protected_Entry_Index! (I), |
acf97c11 | 3452 | -- P, D, M, F); |
76a1c25b | 3453 | |
3454 | -- where T is the protected object, I is the entry index, P are | |
3455 | -- the wrapped parameters, D is the delay amount, M is the delay | |
3456 | -- mode and F is the status flag. | |
3457 | ||
10970cab | 3458 | -- Historically, there was also an implementation for single |
3459 | -- entry protected types (in s-tposen). However, it was removed | |
3460 | -- by also testing for no No_Select_Statements restriction in | |
3461 | -- Exp_Utils.Corresponding_Runtime_Package. This simplified the | |
8dfd0767 | 3462 | -- implementation of s-tposen.adb and provided consistency between |
3463 | -- all versions of System.Tasking.Protected_Objects.Single_Entry | |
3464 | -- (s-tposen*.adb). | |
10970cab | 3465 | |
acf97c11 | 3466 | case Corresponding_Runtime_Package (Conc_Typ) is |
3467 | when System_Tasking_Protected_Objects_Entries => | |
3468 | Append_To (Stmts, | |
3469 | Make_Procedure_Call_Statement (Loc, | |
3470 | Name => | |
83c6c069 | 3471 | New_Occurrence_Of |
acf97c11 | 3472 | (RTE (RE_Timed_Protected_Entry_Call), Loc), |
02a2406d | 3473 | Parameter_Associations => New_List ( |
3474 | Obj_Ref, | |
acf97c11 | 3475 | |
02a2406d | 3476 | Make_Unchecked_Type_Conversion (Loc, -- entry index |
3477 | Subtype_Mark => | |
3478 | New_Occurrence_Of | |
3479 | (RTE (RE_Protected_Entry_Index), Loc), | |
3480 | Expression => Make_Identifier (Loc, Name_uI)), | |
76a1c25b | 3481 | |
02a2406d | 3482 | Make_Identifier (Loc, Name_uP), -- parameter block |
3483 | Make_Identifier (Loc, Name_uD), -- delay | |
3484 | Make_Identifier (Loc, Name_uM), -- delay mode | |
3485 | Make_Identifier (Loc, Name_uF)))); -- status flag | |
76a1c25b | 3486 | |
acf97c11 | 3487 | when others => |
3488 | raise Program_Error; | |
3489 | end case; | |
3490 | ||
3491 | -- Task case | |
ee6ba406 | 3492 | |
ee6ba406 | 3493 | else |
76a1c25b | 3494 | pragma Assert (Ekind (Conc_Typ) = E_Task_Type); |
3495 | ||
3496 | -- Generate: | |
3497 | -- Timed_Task_Entry_Call ( | |
3498 | -- T._task_id, | |
cdb1c38f | 3499 | -- Task_Entry_Index! (I), |
76a1c25b | 3500 | -- P, |
3501 | -- D, | |
3502 | -- M, | |
3503 | -- F); | |
3504 | ||
3505 | -- where T is the task object, I is the entry index, P are the | |
3506 | -- wrapped parameters, D is the delay amount, M is the delay | |
3507 | -- mode and F is the status flag. | |
3508 | ||
3509 | Append_To (Stmts, | |
3510 | Make_Procedure_Call_Statement (Loc, | |
02a2406d | 3511 | Name => |
83c6c069 | 3512 | New_Occurrence_Of (RTE (RE_Timed_Task_Entry_Call), Loc), |
76a1c25b | 3513 | |
02a2406d | 3514 | Parameter_Associations => New_List ( |
3515 | Make_Selected_Component (Loc, -- T._task_id | |
3516 | Prefix => Make_Identifier (Loc, Name_uT), | |
3517 | Selector_Name => Make_Identifier (Loc, Name_uTask_Id)), | |
76a1c25b | 3518 | |
02a2406d | 3519 | Make_Unchecked_Type_Conversion (Loc, -- entry index |
3520 | Subtype_Mark => | |
3521 | New_Occurrence_Of (RTE (RE_Task_Entry_Index), Loc), | |
3522 | Expression => Make_Identifier (Loc, Name_uI)), | |
76a1c25b | 3523 | |
02a2406d | 3524 | Make_Identifier (Loc, Name_uP), -- parameter block |
3525 | Make_Identifier (Loc, Name_uD), -- delay | |
3526 | Make_Identifier (Loc, Name_uM), -- delay mode | |
3527 | Make_Identifier (Loc, Name_uF)))); -- status flag | |
ee6ba406 | 3528 | end if; |
7c949aad | 3529 | |
3530 | else | |
a053db0d | 3531 | -- Initialize out parameters |
7c949aad | 3532 | |
a053db0d | 3533 | Append_To (Stmts, |
3534 | Make_Assignment_Statement (Loc, | |
aabafdc2 | 3535 | Name => Make_Identifier (Loc, Name_uF), |
83c6c069 | 3536 | Expression => New_Occurrence_Of (Standard_False, Loc))); |
a053db0d | 3537 | Append_To (Stmts, |
3538 | Make_Assignment_Statement (Loc, | |
aabafdc2 | 3539 | Name => Make_Identifier (Loc, Name_uC), |
83c6c069 | 3540 | Expression => New_Occurrence_Of (RTE (RE_POK_Function), Loc))); |
76a1c25b | 3541 | end if; |
3542 | ||
3543 | return | |
3544 | Make_Subprogram_Body (Loc, | |
aabafdc2 | 3545 | Specification => Make_Disp_Timed_Select_Spec (Typ), |
3546 | Declarations => Decls, | |
76a1c25b | 3547 | Handled_Statement_Sequence => |
3548 | Make_Handled_Sequence_Of_Statements (Loc, Stmts)); | |
3549 | end Make_Disp_Timed_Select_Body; | |
3550 | ||
3551 | --------------------------------- | |
3552 | -- Make_Disp_Timed_Select_Spec -- | |
3553 | --------------------------------- | |
3554 | ||
3555 | function Make_Disp_Timed_Select_Spec | |
3556 | (Typ : Entity_Id) return Node_Id | |
3557 | is | |
3558 | Loc : constant Source_Ptr := Sloc (Typ); | |
3559 | Def_Id : constant Node_Id := | |
3560 | Make_Defining_Identifier (Loc, | |
3561 | Name_uDisp_Timed_Select); | |
3562 | Params : constant List_Id := New_List; | |
ee6ba406 | 3563 | |
76a1c25b | 3564 | begin |
68f95949 | 3565 | pragma Assert (not Restriction_Active (No_Dispatching_Calls)); |
3566 | ||
725a69d2 | 3567 | -- T : in out Typ; -- Object parameter |
3568 | -- S : Integer; -- Primitive operation slot | |
3569 | -- P : Address; -- Wrapped parameters | |
3570 | -- D : Duration; -- Delay | |
3571 | -- M : Integer; -- Delay Mode | |
3572 | -- C : out Prim_Op_Kind; -- Call kind | |
3573 | -- F : out Boolean; -- Status flag | |
76a1c25b | 3574 | |
725a69d2 | 3575 | Append_List_To (Params, New_List ( |
3576 | ||
3577 | Make_Parameter_Specification (Loc, | |
02a2406d | 3578 | Defining_Identifier => Make_Defining_Identifier (Loc, Name_uT), |
3579 | Parameter_Type => New_Occurrence_Of (Typ, Loc), | |
3580 | In_Present => True, | |
3581 | Out_Present => True), | |
725a69d2 | 3582 | |
3583 | Make_Parameter_Specification (Loc, | |
02a2406d | 3584 | Defining_Identifier => Make_Defining_Identifier (Loc, Name_uS), |
3585 | Parameter_Type => New_Occurrence_Of (Standard_Integer, Loc)), | |
725a69d2 | 3586 | |
3587 | Make_Parameter_Specification (Loc, | |
02a2406d | 3588 | Defining_Identifier => Make_Defining_Identifier (Loc, Name_uP), |
3589 | Parameter_Type => New_Occurrence_Of (RTE (RE_Address), Loc)), | |
76a1c25b | 3590 | |
76a1c25b | 3591 | Make_Parameter_Specification (Loc, |
02a2406d | 3592 | Defining_Identifier => Make_Defining_Identifier (Loc, Name_uD), |
3593 | Parameter_Type => New_Occurrence_Of (Standard_Duration, Loc)), | |
76a1c25b | 3594 | |
76a1c25b | 3595 | Make_Parameter_Specification (Loc, |
02a2406d | 3596 | Defining_Identifier => Make_Defining_Identifier (Loc, Name_uM), |
3597 | Parameter_Type => New_Occurrence_Of (Standard_Integer, Loc)), | |
ee6ba406 | 3598 | |
725a69d2 | 3599 | Make_Parameter_Specification (Loc, |
02a2406d | 3600 | Defining_Identifier => Make_Defining_Identifier (Loc, Name_uC), |
3601 | Parameter_Type => | |
83c6c069 | 3602 | New_Occurrence_Of (RTE (RE_Prim_Op_Kind), Loc), |
02a2406d | 3603 | Out_Present => True))); |
ee6ba406 | 3604 | |
725a69d2 | 3605 | Append_To (Params, |
3606 | Make_Parameter_Specification (Loc, | |
02a2406d | 3607 | Defining_Identifier => Make_Defining_Identifier (Loc, Name_uF), |
3608 | Parameter_Type => New_Occurrence_Of (Standard_Boolean, Loc), | |
3609 | Out_Present => True)); | |
ee6ba406 | 3610 | |
76a1c25b | 3611 | return |
3612 | Make_Procedure_Specification (Loc, | |
3613 | Defining_Unit_Name => Def_Id, | |
3614 | Parameter_Specifications => Params); | |
3615 | end Make_Disp_Timed_Select_Spec; | |
ee6ba406 | 3616 | |
76a1c25b | 3617 | ------------- |
3618 | -- Make_DT -- | |
3619 | ------------- | |
ee6ba406 | 3620 | |
725a69d2 | 3621 | -- The frontend supports two models for expanding dispatch tables |
02a2406d | 3622 | -- associated with library-level defined tagged types: statically and |
3623 | -- non-statically allocated dispatch tables. In the former case the object | |
3624 | -- containing the dispatch table is constant and it is initialized by means | |
3625 | -- of a positional aggregate. In the latter case, the object containing | |
3626 | -- the dispatch table is a variable which is initialized by means of | |
3627 | -- assignments. | |
725a69d2 | 3628 | |
3629 | -- In case of locally defined tagged types, the object containing the | |
02a2406d | 3630 | -- object containing the dispatch table is always a variable (instead of a |
3631 | -- constant). This is currently required to give support to late overriding | |
3632 | -- of primitives. For example: | |
725a69d2 | 3633 | |
3634 | -- procedure Example is | |
3635 | -- package Pkg is | |
3636 | -- type T1 is tagged null record; | |
3637 | -- procedure Prim (O : T1); | |
3638 | -- end Pkg; | |
3639 | ||
3640 | -- type T2 is new Pkg.T1 with null record; | |
3641 | -- procedure Prim (X : T2) is -- late overriding | |
3642 | -- begin | |
3643 | -- ... | |
3644 | -- ... | |
3645 | -- end; | |
952af0b9 | 3646 | |
17e14451 | 3647 | function Make_DT (Typ : Entity_Id; N : Node_Id := Empty) return List_Id is |
360b005f | 3648 | GM : constant Ghost_Mode_Type := Ghost_Mode; |
3649 | -- Save the current Ghost mode in effect in case the tagged type sets a | |
3650 | -- different mode. | |
3651 | ||
17e14451 | 3652 | Loc : constant Source_Ptr := Sloc (Typ); |
3653 | ||
725a69d2 | 3654 | Max_Predef_Prims : constant Int := |
3655 | UI_To_Int | |
3656 | (Intval | |
3657 | (Expression | |
17e14451 | 3658 | (Parent (RTE (RE_Max_Predef_Prims))))); |
3659 | ||
cc60bd16 | 3660 | DT_Decl : constant Elist_Id := New_Elmt_List; |
3661 | DT_Aggr : constant Elist_Id := New_Elmt_List; | |
3662 | -- Entities marked with attribute Is_Dispatch_Table_Entity | |
3663 | ||
349db231 | 3664 | procedure Check_Premature_Freezing |
3665 | (Subp : Entity_Id; | |
3666 | Tagged_Type : Entity_Id; | |
3667 | Typ : Entity_Id); | |
d1a2e31b | 3668 | -- Verify that all untagged types in the profile of a subprogram are |
3669 | -- frozen at the point the subprogram is frozen. This enforces the rule | |
3670 | -- on RM 13.14 (14) as modified by AI05-019. At the point a subprogram | |
3671 | -- is frozen, enough must be known about it to build the activation | |
3672 | -- record for it, which requires at least that the size of all | |
3673 | -- parameters be known. Controlling arguments are by-reference, | |
decd66e0 | 3674 | -- and therefore the rule only applies to untagged types. Typical |
d1a2e31b | 3675 | -- violation of the rule involves an object declaration that freezes a |
3676 | -- tagged type, when one of its primitive operations has a type in its | |
3677 | -- profile whose full view has not been analyzed yet. More complex cases | |
3678 | -- involve composite types that have one private unfrozen subcomponent. | |
725a69d2 | 3679 | |
f301a57b | 3680 | procedure Export_DT (Typ : Entity_Id; DT : Entity_Id; Index : Nat := 0); |
3681 | -- Export the dispatch table DT of tagged type Typ. Required to generate | |
3682 | -- forward references and statically allocate the table. For primary | |
3683 | -- dispatch tables Index is 0; for secondary dispatch tables the value | |
3684 | -- of index must match the Suffix_Index value assigned to the table by | |
3685 | -- Make_Tags when generating its unique external name, and it is used to | |
3686 | -- retrieve from the Dispatch_Table_Wrappers list associated with Typ | |
3687 | -- the external name generated by Import_DT. | |
24971415 | 3688 | |
725a69d2 | 3689 | procedure Make_Secondary_DT |
acf97c11 | 3690 | (Typ : Entity_Id; |
3691 | Iface : Entity_Id; | |
f301a57b | 3692 | Suffix_Index : Int; |
acf97c11 | 3693 | Num_Iface_Prims : Nat; |
3694 | Iface_DT_Ptr : Entity_Id; | |
3695 | Predef_Prims_Ptr : Entity_Id; | |
3696 | Build_Thunks : Boolean; | |
3697 | Result : List_Id); | |
cdb1c38f | 3698 | -- Ada 2005 (AI-251): Expand the declarations for a Secondary Dispatch |
3699 | -- Table of Typ associated with Iface. Each abstract interface of Typ | |
3700 | -- has two secondary dispatch tables: one containing pointers to thunks | |
3701 | -- and another containing pointers to the primitives covering the | |
3702 | -- interface primitives. The former secondary table is generated when | |
3703 | -- Build_Thunks is True, and provides common support for dispatching | |
3704 | -- calls through interface types; the latter secondary table is | |
3705 | -- generated when Build_Thunks is False, and provides support for | |
3706 | -- Generic Dispatching Constructors that dispatch calls through | |
278c67dc | 3707 | -- interface types. When constructing this latter table the value of |
3708 | -- Suffix_Index is -1 to indicate that there is no need to export such | |
3709 | -- table when building statically allocated dispatch tables; a positive | |
3710 | -- value of Suffix_Index must match the Suffix_Index value assigned to | |
3711 | -- this secondary dispatch table by Make_Tags when its unique external | |
3712 | -- name was generated. | |
9dfe12ae | 3713 | |
360b005f | 3714 | procedure Restore_Globals; |
3715 | -- Restore the values of all saved global variables | |
3716 | ||
17e14451 | 3717 | ------------------------------ |
3718 | -- Check_Premature_Freezing -- | |
3719 | ------------------------------ | |
3720 | ||
349db231 | 3721 | procedure Check_Premature_Freezing |
3722 | (Subp : Entity_Id; | |
3723 | Tagged_Type : Entity_Id; | |
3724 | Typ : Entity_Id) | |
3725 | is | |
3726 | Comp : Entity_Id; | |
aada9bb5 | 3727 | |
3728 | function Is_Actual_For_Formal_Incomplete_Type | |
3729 | (T : Entity_Id) return Boolean; | |
65a805b2 | 3730 | -- In Ada 2012, if a nested generic has an incomplete formal type, |
3731 | -- the actual may be (and usually is) a private type whose completion | |
5f8e1c78 | 3732 | -- appears later. It is safe to build the dispatch table in this |
3733 | -- case, gigi will have full views available. | |
3734 | ||
3735 | ------------------------------------------ | |
3736 | -- Is_Actual_For_Formal_Incomplete_Type -- | |
3737 | ------------------------------------------ | |
3738 | ||
aada9bb5 | 3739 | function Is_Actual_For_Formal_Incomplete_Type |
3740 | (T : Entity_Id) return Boolean | |
5f8e1c78 | 3741 | is |
3742 | Gen_Par : Entity_Id; | |
3743 | F : Node_Id; | |
aada9bb5 | 3744 | |
5f8e1c78 | 3745 | begin |
3746 | if not Is_Generic_Instance (Current_Scope) | |
3747 | or else not Used_As_Generic_Actual (T) | |
3748 | then | |
3749 | return False; | |
5f8e1c78 | 3750 | else |
3751 | Gen_Par := Generic_Parent (Parent (Current_Scope)); | |
3752 | end if; | |
3753 | ||
3754 | F := | |
3755 | First | |
3756 | (Generic_Formal_Declarations | |
02a2406d | 3757 | (Unit_Declaration_Node (Gen_Par))); |
5f8e1c78 | 3758 | while Present (F) loop |
3759 | if Ekind (Defining_Identifier (F)) = E_Incomplete_Type then | |
3760 | return True; | |
3761 | end if; | |
3762 | ||
3763 | Next (F); | |
3764 | end loop; | |
3765 | ||
3766 | return False; | |
3767 | end Is_Actual_For_Formal_Incomplete_Type; | |
278c67dc | 3768 | |
aada9bb5 | 3769 | -- Start of processing for Check_Premature_Freezing |
3770 | ||
17e14451 | 3771 | begin |
496b8337 | 3772 | -- Note that if the type is a (subtype of) a generic actual, the |
3773 | -- actual will have been frozen by the instantiation. | |
3774 | ||
17e14451 | 3775 | if Present (N) |
349db231 | 3776 | and then Is_Private_Type (Typ) |
17e14451 | 3777 | and then No (Full_View (Typ)) |
3778 | and then not Is_Generic_Type (Typ) | |
3779 | and then not Is_Tagged_Type (Typ) | |
3780 | and then not Is_Frozen (Typ) | |
496b8337 | 3781 | and then not Is_Generic_Actual_Type (Typ) |
17e14451 | 3782 | then |
3783 | Error_Msg_Sloc := Sloc (Subp); | |
503f7fd3 | 3784 | Error_Msg_NE |
17e14451 | 3785 | ("declaration must appear after completion of type &", N, Typ); |
3786 | Error_Msg_NE | |
02a2406d | 3787 | ("\which is an untagged type in the profile of " |
3788 | & "primitive operation & declared#", N, Subp); | |
349db231 | 3789 | |
3790 | else | |
3791 | Comp := Private_Component (Typ); | |
3792 | ||
3793 | if not Is_Tagged_Type (Typ) | |
3794 | and then Present (Comp) | |
3795 | and then not Is_Frozen (Comp) | |
02a2406d | 3796 | and then not Is_Actual_For_Formal_Incomplete_Type (Comp) |
349db231 | 3797 | then |
3798 | Error_Msg_Sloc := Sloc (Subp); | |
3799 | Error_Msg_Node_2 := Subp; | |
3800 | Error_Msg_Name_1 := Chars (Tagged_Type); | |
3801 | Error_Msg_NE | |
3802 | ("declaration must appear after completion of type &", | |
02a2406d | 3803 | N, Comp); |
349db231 | 3804 | Error_Msg_NE |
02a2406d | 3805 | ("\which is a component of untagged type& in the profile " |
3806 | & "of primitive & of type % that is frozen by the " | |
3807 | & "declaration ", N, Typ); | |
349db231 | 3808 | end if; |
17e14451 | 3809 | end if; |
3810 | end Check_Premature_Freezing; | |
3811 | ||
24971415 | 3812 | --------------- |
3813 | -- Export_DT -- | |
3814 | --------------- | |
3815 | ||
f301a57b | 3816 | procedure Export_DT (Typ : Entity_Id; DT : Entity_Id; Index : Nat := 0) |
3817 | is | |
3818 | Count : Nat; | |
3819 | Elmt : Elmt_Id; | |
3820 | ||
24971415 | 3821 | begin |
3822 | Set_Is_Statically_Allocated (DT); | |
3823 | Set_Is_True_Constant (DT); | |
3824 | Set_Is_Exported (DT); | |
3825 | ||
f301a57b | 3826 | Count := 0; |
3827 | Elmt := First_Elmt (Dispatch_Table_Wrappers (Typ)); | |
3828 | while Count /= Index loop | |
3829 | Next_Elmt (Elmt); | |
3830 | Count := Count + 1; | |
3831 | end loop; | |
3832 | ||
3833 | pragma Assert (Related_Type (Node (Elmt)) = Typ); | |
3834 | ||
f92da234 | 3835 | Get_External_Name (Node (Elmt)); |
24971415 | 3836 | Set_Interface_Name (DT, |
3837 | Make_String_Literal (Loc, | |
3838 | Strval => String_From_Name_Buffer)); | |
3839 | ||
3840 | -- Ensure proper Sprint output of this implicit importation | |
3841 | ||
3842 | Set_Is_Internal (DT); | |
3843 | Set_Is_Public (DT); | |
3844 | end Export_DT; | |
3845 | ||
725a69d2 | 3846 | ----------------------- |
3847 | -- Make_Secondary_DT -- | |
3848 | ----------------------- | |
ee6ba406 | 3849 | |
725a69d2 | 3850 | procedure Make_Secondary_DT |
acf97c11 | 3851 | (Typ : Entity_Id; |
3852 | Iface : Entity_Id; | |
f301a57b | 3853 | Suffix_Index : Int; |
acf97c11 | 3854 | Num_Iface_Prims : Nat; |
3855 | Iface_DT_Ptr : Entity_Id; | |
3856 | Predef_Prims_Ptr : Entity_Id; | |
3857 | Build_Thunks : Boolean; | |
3858 | Result : List_Id) | |
725a69d2 | 3859 | is |
3860 | Loc : constant Source_Ptr := Sloc (Typ); | |
f301a57b | 3861 | Exporting_Table : constant Boolean := |
3862 | Building_Static_DT (Typ) | |
3863 | and then Suffix_Index > 0; | |
ec97ce79 | 3864 | Iface_DT : constant Entity_Id := Make_Temporary (Loc, 'T'); |
3865 | Predef_Prims : constant Entity_Id := Make_Temporary (Loc, 'R'); | |
725a69d2 | 3866 | DT_Constr_List : List_Id; |
3867 | DT_Aggr_List : List_Id; | |
3868 | Empty_DT : Boolean := False; | |
3869 | Nb_Predef_Prims : Nat := 0; | |
3870 | Nb_Prim : Nat; | |
3871 | New_Node : Node_Id; | |
3872 | OSD : Entity_Id; | |
3873 | OSD_Aggr_List : List_Id; | |
3874 | Pos : Nat; | |
3875 | Prim : Entity_Id; | |
3876 | Prim_Elmt : Elmt_Id; | |
3877 | Prim_Ops_Aggr_List : List_Id; | |
343d35dc | 3878 | |
725a69d2 | 3879 | begin |
17e14451 | 3880 | -- Handle cases in which we do not generate statically allocated |
3881 | -- dispatch tables. | |
343d35dc | 3882 | |
24971415 | 3883 | if not Building_Static_DT (Typ) then |
725a69d2 | 3884 | Set_Ekind (Predef_Prims, E_Variable); |
725a69d2 | 3885 | Set_Ekind (Iface_DT, E_Variable); |
343d35dc | 3886 | |
725a69d2 | 3887 | -- Statically allocated dispatch tables and related entities are |
3888 | -- constants. | |
343d35dc | 3889 | |
725a69d2 | 3890 | else |
3891 | Set_Ekind (Predef_Prims, E_Constant); | |
3892 | Set_Is_Statically_Allocated (Predef_Prims); | |
3893 | Set_Is_True_Constant (Predef_Prims); | |
343d35dc | 3894 | |
725a69d2 | 3895 | Set_Ekind (Iface_DT, E_Constant); |
3896 | Set_Is_Statically_Allocated (Iface_DT); | |
3897 | Set_Is_True_Constant (Iface_DT); | |
343d35dc | 3898 | end if; |
3899 | ||
f301a57b | 3900 | -- Calculate the number of slots of the dispatch table. If the number |
3901 | -- of primitives of Typ is 0 we reserve a dummy single entry for its | |
0c826ed4 | 3902 | -- DT because at run time the pointer to this dummy entry will be |
f301a57b | 3903 | -- used as the tag. |
68f95949 | 3904 | |
cdb1c38f | 3905 | if Num_Iface_Prims = 0 then |
725a69d2 | 3906 | Empty_DT := True; |
3907 | Nb_Prim := 1; | |
cdb1c38f | 3908 | else |
3909 | Nb_Prim := Num_Iface_Prims; | |
725a69d2 | 3910 | end if; |
76a1c25b | 3911 | |
725a69d2 | 3912 | -- Generate: |
952af0b9 | 3913 | |
725a69d2 | 3914 | -- Predef_Prims : Address_Array (1 .. Default_Prim_Ops_Count) := |
3915 | -- (predef-prim-op-thunk-1'address, | |
3916 | -- predef-prim-op-thunk-2'address, | |
3917 | -- ... | |
3918 | -- predef-prim-op-thunk-n'address); | |
3919 | -- for Predef_Prims'Alignment use Address'Alignment | |
952af0b9 | 3920 | |
725a69d2 | 3921 | -- Stage 1: Calculate the number of predefined primitives |
76a1c25b | 3922 | |
24971415 | 3923 | if not Building_Static_DT (Typ) then |
725a69d2 | 3924 | Nb_Predef_Prims := Max_Predef_Prims; |
3925 | else | |
3926 | Prim_Elmt := First_Elmt (Primitive_Operations (Typ)); | |
3927 | while Present (Prim_Elmt) loop | |
3928 | Prim := Node (Prim_Elmt); | |
aad6babd | 3929 | |
725a69d2 | 3930 | if Is_Predefined_Dispatching_Operation (Prim) |
3931 | and then not Is_Abstract_Subprogram (Prim) | |
3932 | then | |
3933 | Pos := UI_To_Int (DT_Position (Prim)); | |
aad6babd | 3934 | |
725a69d2 | 3935 | if Pos > Nb_Predef_Prims then |
3936 | Nb_Predef_Prims := Pos; | |
3937 | end if; | |
3938 | end if; | |
aad6babd | 3939 | |
725a69d2 | 3940 | Next_Elmt (Prim_Elmt); |
3941 | end loop; | |
3942 | end if; | |
aad6babd | 3943 | |
725a69d2 | 3944 | -- Stage 2: Create the thunks associated with the predefined |
3945 | -- primitives and save their entity to fill the aggregate. | |
ee6ba406 | 3946 | |
725a69d2 | 3947 | declare |
3948 | Prim_Table : array (Nat range 1 .. Nb_Predef_Prims) of Entity_Id; | |
cc60bd16 | 3949 | Decl : Node_Id; |
725a69d2 | 3950 | Thunk_Id : Entity_Id; |
3951 | Thunk_Code : Node_Id; | |
aad6babd | 3952 | |
725a69d2 | 3953 | begin |
3954 | Prim_Ops_Aggr_List := New_List; | |
3955 | Prim_Table := (others => Empty); | |
aad6babd | 3956 | |
cdb1c38f | 3957 | if Building_Static_DT (Typ) then |
3958 | Prim_Elmt := First_Elmt (Primitive_Operations (Typ)); | |
3959 | while Present (Prim_Elmt) loop | |
3960 | Prim := Node (Prim_Elmt); | |
aad6babd | 3961 | |
cdb1c38f | 3962 | if Is_Predefined_Dispatching_Operation (Prim) |
3963 | and then not Is_Abstract_Subprogram (Prim) | |
3f8cf2d2 | 3964 | and then not Is_Eliminated (Prim) |
cdb1c38f | 3965 | and then not Present (Prim_Table |
3966 | (UI_To_Int (DT_Position (Prim)))) | |
3967 | then | |
3968 | if not Build_Thunks then | |
3969 | Prim_Table (UI_To_Int (DT_Position (Prim))) := | |
3970 | Alias (Prim); | |
aad6babd | 3971 | |
cdb1c38f | 3972 | else |
fc2907f6 | 3973 | Expand_Interface_Thunk |
3974 | (Ultimate_Alias (Prim), Thunk_Id, Thunk_Code); | |
aad6babd | 3975 | |
cdb1c38f | 3976 | if Present (Thunk_Id) then |
3977 | Append_To (Result, Thunk_Code); | |
3978 | Prim_Table (UI_To_Int (DT_Position (Prim))) | |
3979 | := Thunk_Id; | |
3980 | end if; | |
3981 | end if; | |
725a69d2 | 3982 | end if; |
aad6babd | 3983 | |
cdb1c38f | 3984 | Next_Elmt (Prim_Elmt); |
3985 | end loop; | |
3986 | end if; | |
aad6babd | 3987 | |
725a69d2 | 3988 | for J in Prim_Table'Range loop |
3989 | if Present (Prim_Table (J)) then | |
3990 | New_Node := | |
cc60bd16 | 3991 | Unchecked_Convert_To (RTE (RE_Prim_Ptr), |
acf97c11 | 3992 | Make_Attribute_Reference (Loc, |
83c6c069 | 3993 | Prefix => New_Occurrence_Of (Prim_Table (J), Loc), |
acf97c11 | 3994 | Attribute_Name => Name_Unrestricted_Access)); |
725a69d2 | 3995 | else |
cc60bd16 | 3996 | New_Node := Make_Null (Loc); |
725a69d2 | 3997 | end if; |
952af0b9 | 3998 | |
725a69d2 | 3999 | Append_To (Prim_Ops_Aggr_List, New_Node); |
4000 | end loop; | |
952af0b9 | 4001 | |
cc60bd16 | 4002 | New_Node := |
02a2406d | 4003 | Make_Aggregate (Loc, Expressions => Prim_Ops_Aggr_List); |
cc60bd16 | 4004 | |
4005 | -- Remember aggregates initializing dispatch tables | |
4006 | ||
4007 | Append_Elmt (New_Node, DT_Aggr); | |
4008 | ||
4009 | Decl := | |
4010 | Make_Subtype_Declaration (Loc, | |
ec97ce79 | 4011 | Defining_Identifier => Make_Temporary (Loc, 'S'), |
4012 | Subtype_Indication => | |
83c6c069 | 4013 | New_Occurrence_Of (RTE (RE_Address_Array), Loc)); |
cc60bd16 | 4014 | |
4015 | Append_To (Result, Decl); | |
4016 | ||
725a69d2 | 4017 | Append_To (Result, |
4018 | Make_Object_Declaration (Loc, | |
4019 | Defining_Identifier => Predef_Prims, | |
24971415 | 4020 | Constant_Present => Building_Static_DT (Typ), |
725a69d2 | 4021 | Aliased_Present => True, |
83c6c069 | 4022 | Object_Definition => New_Occurrence_Of |
cc60bd16 | 4023 | (Defining_Identifier (Decl), Loc), |
4024 | Expression => New_Node)); | |
aad6babd | 4025 | |
725a69d2 | 4026 | Append_To (Result, |
4027 | Make_Attribute_Definition_Clause (Loc, | |
83c6c069 | 4028 | Name => New_Occurrence_Of (Predef_Prims, Loc), |
725a69d2 | 4029 | Chars => Name_Alignment, |
4030 | Expression => | |
4031 | Make_Attribute_Reference (Loc, | |
4032 | Prefix => | |
83c6c069 | 4033 | New_Occurrence_Of (RTE (RE_Integer_Address), Loc), |
725a69d2 | 4034 | Attribute_Name => Name_Alignment))); |
4035 | end; | |
aad6babd | 4036 | |
725a69d2 | 4037 | -- Generate |
76a1c25b | 4038 | |
725a69d2 | 4039 | -- OSD : Ada.Tags.Object_Specific_Data (Nb_Prims) := |
4040 | -- (OSD_Table => (1 => <value>, | |
4041 | -- ... | |
4042 | -- N => <value>)); | |
76a1c25b | 4043 | |
725a69d2 | 4044 | -- Iface_DT : Dispatch_Table (Nb_Prims) := |
4045 | -- ([ Signature => <sig-value> ], | |
4046 | -- Tag_Kind => <tag_kind-value>, | |
4047 | -- Predef_Prims => Predef_Prims'Address, | |
4048 | -- Offset_To_Top => 0, | |
4049 | -- OSD => OSD'Address, | |
4050 | -- Prims_Ptr => (prim-op-1'address, | |
4051 | -- prim-op-2'address, | |
4052 | -- ... | |
4053 | -- prim-op-n'address)); | |
f301a57b | 4054 | -- for Iface_DT'Alignment use Address'Alignment; |
76a1c25b | 4055 | |
725a69d2 | 4056 | -- Stage 3: Initialize the discriminant and the record components |
aad6babd | 4057 | |
725a69d2 | 4058 | DT_Constr_List := New_List; |
4059 | DT_Aggr_List := New_List; | |
343d35dc | 4060 | |
4c5d0f70 | 4061 | -- Nb_Prim |
343d35dc | 4062 | |
4c5d0f70 | 4063 | Append_To (DT_Constr_List, Make_Integer_Literal (Loc, Nb_Prim)); |
4064 | Append_To (DT_Aggr_List, Make_Integer_Literal (Loc, Nb_Prim)); | |
343d35dc | 4065 | |
725a69d2 | 4066 | -- Signature |
343d35dc | 4067 | |
725a69d2 | 4068 | if RTE_Record_Component_Available (RE_Signature) then |
4069 | Append_To (DT_Aggr_List, | |
83c6c069 | 4070 | New_Occurrence_Of (RTE (RE_Secondary_DT), Loc)); |
725a69d2 | 4071 | end if; |
343d35dc | 4072 | |
725a69d2 | 4073 | -- Tag_Kind |
343d35dc | 4074 | |
725a69d2 | 4075 | if RTE_Record_Component_Available (RE_Tag_Kind) then |
4076 | Append_To (DT_Aggr_List, Tagged_Kind (Typ)); | |
4077 | end if; | |
aad6babd | 4078 | |
725a69d2 | 4079 | -- Predef_Prims |
aad6babd | 4080 | |
725a69d2 | 4081 | Append_To (DT_Aggr_List, |
4082 | Make_Attribute_Reference (Loc, | |
02a2406d | 4083 | Prefix => New_Occurrence_Of (Predef_Prims, Loc), |
725a69d2 | 4084 | Attribute_Name => Name_Address)); |
aad6babd | 4085 | |
725a69d2 | 4086 | -- Note: The correct value of Offset_To_Top will be set by the init |
4087 | -- subprogram | |
aad6babd | 4088 | |
725a69d2 | 4089 | Append_To (DT_Aggr_List, Make_Integer_Literal (Loc, 0)); |
aad6babd | 4090 | |
725a69d2 | 4091 | -- Generate the Object Specific Data table required to dispatch calls |
4092 | -- through synchronized interfaces. | |
aad6babd | 4093 | |
725a69d2 | 4094 | if Empty_DT |
4095 | or else Is_Abstract_Type (Typ) | |
4096 | or else Is_Controlled (Typ) | |
4097 | or else Restriction_Active (No_Dispatching_Calls) | |
4098 | or else not Is_Limited_Type (Typ) | |
a652dd51 | 4099 | or else not Has_Interfaces (Typ) |
cdb1c38f | 4100 | or else not Build_Thunks |
38d2fa31 | 4101 | or else not RTE_Record_Component_Available (RE_OSD_Table) |
725a69d2 | 4102 | then |
4103 | -- No OSD table required | |
ee6ba406 | 4104 | |
725a69d2 | 4105 | Append_To (DT_Aggr_List, |
83c6c069 | 4106 | New_Occurrence_Of (RTE (RE_Null_Address), Loc)); |
d62940bf | 4107 | |
725a69d2 | 4108 | else |
4109 | OSD_Aggr_List := New_List; | |
d62940bf | 4110 | |
725a69d2 | 4111 | declare |
4112 | Prim_Table : array (Nat range 1 .. Nb_Prim) of Entity_Id; | |
4113 | Prim : Entity_Id; | |
4114 | Prim_Alias : Entity_Id; | |
4115 | Prim_Elmt : Elmt_Id; | |
4116 | E : Entity_Id; | |
4117 | Count : Nat := 0; | |
4118 | Pos : Nat; | |
d62940bf | 4119 | |
725a69d2 | 4120 | begin |
4121 | Prim_Table := (others => Empty); | |
4122 | Prim_Alias := Empty; | |
d62940bf | 4123 | |
725a69d2 | 4124 | Prim_Elmt := First_Elmt (Primitive_Operations (Typ)); |
4125 | while Present (Prim_Elmt) loop | |
4126 | Prim := Node (Prim_Elmt); | |
d62940bf | 4127 | |
a652dd51 | 4128 | if Present (Interface_Alias (Prim)) |
725a69d2 | 4129 | and then Find_Dispatching_Type |
a652dd51 | 4130 | (Interface_Alias (Prim)) = Iface |
725a69d2 | 4131 | then |
a652dd51 | 4132 | Prim_Alias := Interface_Alias (Prim); |
fc2907f6 | 4133 | E := Ultimate_Alias (Prim); |
725a69d2 | 4134 | Pos := UI_To_Int (DT_Position (Prim_Alias)); |
68f95949 | 4135 | |
725a69d2 | 4136 | if Present (Prim_Table (Pos)) then |
4137 | pragma Assert (Prim_Table (Pos) = E); | |
4138 | null; | |
68f95949 | 4139 | |
725a69d2 | 4140 | else |
4141 | Prim_Table (Pos) := E; | |
4142 | ||
4143 | Append_To (OSD_Aggr_List, | |
4144 | Make_Component_Association (Loc, | |
02a2406d | 4145 | Choices => New_List ( |
725a69d2 | 4146 | Make_Integer_Literal (Loc, |
4147 | DT_Position (Prim_Alias))), | |
4148 | Expression => | |
4149 | Make_Integer_Literal (Loc, | |
4150 | DT_Position (Alias (Prim))))); | |
4151 | ||
4152 | Count := Count + 1; | |
4153 | end if; | |
4154 | end if; | |
4155 | ||
4156 | Next_Elmt (Prim_Elmt); | |
4157 | end loop; | |
4158 | pragma Assert (Count = Nb_Prim); | |
4159 | end; | |
4160 | ||
ec97ce79 | 4161 | OSD := Make_Temporary (Loc, 'I'); |
725a69d2 | 4162 | |
4163 | Append_To (Result, | |
4164 | Make_Object_Declaration (Loc, | |
4165 | Defining_Identifier => OSD, | |
4166 | Object_Definition => | |
4167 | Make_Subtype_Indication (Loc, | |
4168 | Subtype_Mark => | |
83c6c069 | 4169 | New_Occurrence_Of (RTE (RE_Object_Specific_Data), Loc), |
02a2406d | 4170 | Constraint => |
725a69d2 | 4171 | Make_Index_Or_Discriminant_Constraint (Loc, |
4172 | Constraints => New_List ( | |
4173 | Make_Integer_Literal (Loc, Nb_Prim)))), | |
725a69d2 | 4174 | |
ec97ce79 | 4175 | Expression => |
4176 | Make_Aggregate (Loc, | |
4177 | Component_Associations => New_List ( | |
4178 | Make_Component_Association (Loc, | |
02a2406d | 4179 | Choices => New_List ( |
ec97ce79 | 4180 | New_Occurrence_Of |
4181 | (RTE_Record_Component (RE_OSD_Num_Prims), Loc)), | |
4182 | Expression => | |
4183 | Make_Integer_Literal (Loc, Nb_Prim)), | |
4184 | ||
4185 | Make_Component_Association (Loc, | |
02a2406d | 4186 | Choices => New_List ( |
ec97ce79 | 4187 | New_Occurrence_Of |
4188 | (RTE_Record_Component (RE_OSD_Table), Loc)), | |
4189 | Expression => Make_Aggregate (Loc, | |
4190 | Component_Associations => OSD_Aggr_List)))))); | |
725a69d2 | 4191 | |
17e14451 | 4192 | Append_To (Result, |
4193 | Make_Attribute_Definition_Clause (Loc, | |
83c6c069 | 4194 | Name => New_Occurrence_Of (OSD, Loc), |
17e14451 | 4195 | Chars => Name_Alignment, |
4196 | Expression => | |
4197 | Make_Attribute_Reference (Loc, | |
02a2406d | 4198 | Prefix => |
83c6c069 | 4199 | New_Occurrence_Of (RTE (RE_Integer_Address), Loc), |
17e14451 | 4200 | Attribute_Name => Name_Alignment))); |
4201 | ||
725a69d2 | 4202 | -- In secondary dispatch tables the Typeinfo component contains |
4203 | -- the address of the Object Specific Data (see a-tags.ads) | |
4204 | ||
4205 | Append_To (DT_Aggr_List, | |
4206 | Make_Attribute_Reference (Loc, | |
02a2406d | 4207 | Prefix => New_Occurrence_Of (OSD, Loc), |
725a69d2 | 4208 | Attribute_Name => Name_Address)); |
4209 | end if; | |
4210 | ||
4211 | -- Initialize the table of primitive operations | |
4212 | ||
4213 | Prim_Ops_Aggr_List := New_List; | |
4214 | ||
4215 | if Empty_DT then | |
cc60bd16 | 4216 | Append_To (Prim_Ops_Aggr_List, Make_Null (Loc)); |
725a69d2 | 4217 | |
4218 | elsif Is_Abstract_Type (Typ) | |
9a479e51 | 4219 | or else not Building_Static_DT (Typ) |
725a69d2 | 4220 | then |
4221 | for J in 1 .. Nb_Prim loop | |
cc60bd16 | 4222 | Append_To (Prim_Ops_Aggr_List, Make_Null (Loc)); |
725a69d2 | 4223 | end loop; |
4224 | ||
4225 | else | |
4226 | declare | |
d00681a7 | 4227 | CPP_Nb_Prims : constant Nat := CPP_Num_Prims (Typ); |
4228 | E : Entity_Id; | |
4229 | Prim_Pos : Nat; | |
4230 | Prim_Table : array (Nat range 1 .. Nb_Prim) of Entity_Id; | |
4231 | Thunk_Code : Node_Id; | |
4232 | Thunk_Id : Entity_Id; | |
725a69d2 | 4233 | |
4234 | begin | |
4235 | Prim_Table := (others => Empty); | |
4236 | ||
4237 | Prim_Elmt := First_Elmt (Primitive_Operations (Typ)); | |
4238 | while Present (Prim_Elmt) loop | |
d00681a7 | 4239 | Prim := Node (Prim_Elmt); |
4240 | E := Ultimate_Alias (Prim); | |
4241 | Prim_Pos := UI_To_Int (DT_Position (E)); | |
725a69d2 | 4242 | |
d00681a7 | 4243 | -- Do not reference predefined primitives because they are |
4244 | -- located in a separate dispatch table; skip abstract and | |
4245 | -- eliminated primitives; skip primitives located in the C++ | |
4246 | -- part of the dispatch table because their slot is set by | |
4247 | -- the IC routine. | |
3f8cf2d2 | 4248 | |
725a69d2 | 4249 | if not Is_Predefined_Dispatching_Operation (Prim) |
a652dd51 | 4250 | and then Present (Interface_Alias (Prim)) |
725a69d2 | 4251 | and then not Is_Abstract_Subprogram (Alias (Prim)) |
3f8cf2d2 | 4252 | and then not Is_Eliminated (Alias (Prim)) |
d00681a7 | 4253 | and then (not Is_CPP_Class (Root_Type (Typ)) |
4254 | or else Prim_Pos > CPP_Nb_Prims) | |
725a69d2 | 4255 | and then Find_Dispatching_Type |
a652dd51 | 4256 | (Interface_Alias (Prim)) = Iface |
725a69d2 | 4257 | |
4258 | -- Generate the code of the thunk only if the abstract | |
4259 | -- interface type is not an immediate ancestor of | |
d00681a7 | 4260 | -- Tagged_Type. Otherwise the DT associated with the |
725a69d2 | 4261 | -- interface is the primary DT. |
4262 | ||
cb4af01d | 4263 | and then not Is_Ancestor (Iface, Typ, |
4264 | Use_Full_View => True) | |
725a69d2 | 4265 | then |
cdb1c38f | 4266 | if not Build_Thunks then |
d00681a7 | 4267 | Prim_Pos := |
a652dd51 | 4268 | UI_To_Int (DT_Position (Interface_Alias (Prim))); |
d00681a7 | 4269 | Prim_Table (Prim_Pos) := Alias (Prim); |
4270 | ||
cdb1c38f | 4271 | else |
4272 | Expand_Interface_Thunk (Prim, Thunk_Id, Thunk_Code); | |
725a69d2 | 4273 | |
cdb1c38f | 4274 | if Present (Thunk_Id) then |
d00681a7 | 4275 | Prim_Pos := |
a652dd51 | 4276 | UI_To_Int (DT_Position (Interface_Alias (Prim))); |
cdb1c38f | 4277 | |
d00681a7 | 4278 | Prim_Table (Prim_Pos) := Thunk_Id; |
cdb1c38f | 4279 | Append_To (Result, Thunk_Code); |
4280 | end if; | |
725a69d2 | 4281 | end if; |
4282 | end if; | |
4283 | ||
4284 | Next_Elmt (Prim_Elmt); | |
4285 | end loop; | |
4286 | ||
4287 | for J in Prim_Table'Range loop | |
4288 | if Present (Prim_Table (J)) then | |
4289 | New_Node := | |
cc60bd16 | 4290 | Unchecked_Convert_To (RTE (RE_Prim_Ptr), |
acf97c11 | 4291 | Make_Attribute_Reference (Loc, |
83c6c069 | 4292 | Prefix => New_Occurrence_Of (Prim_Table (J), Loc), |
acf97c11 | 4293 | Attribute_Name => Name_Unrestricted_Access)); |
d00681a7 | 4294 | |
725a69d2 | 4295 | else |
cc60bd16 | 4296 | New_Node := Make_Null (Loc); |
725a69d2 | 4297 | end if; |
4298 | ||
4299 | Append_To (Prim_Ops_Aggr_List, New_Node); | |
4300 | end loop; | |
4301 | end; | |
4302 | end if; | |
4303 | ||
cc60bd16 | 4304 | New_Node := |
725a69d2 | 4305 | Make_Aggregate (Loc, |
cc60bd16 | 4306 | Expressions => Prim_Ops_Aggr_List); |
4307 | ||
4308 | Append_To (DT_Aggr_List, New_Node); | |
4309 | ||
4310 | -- Remember aggregates initializing dispatch tables | |
4311 | ||
4312 | Append_Elmt (New_Node, DT_Aggr); | |
725a69d2 | 4313 | |
f301a57b | 4314 | -- Note: Secondary dispatch tables cannot be declared constant |
4315 | -- because the component Offset_To_Top is currently initialized | |
4316 | -- by the IP routine. | |
4317 | ||
725a69d2 | 4318 | Append_To (Result, |
4319 | Make_Object_Declaration (Loc, | |
4320 | Defining_Identifier => Iface_DT, | |
4321 | Aliased_Present => True, | |
f301a57b | 4322 | Constant_Present => False, |
4323 | ||
725a69d2 | 4324 | Object_Definition => |
4325 | Make_Subtype_Indication (Loc, | |
83c6c069 | 4326 | Subtype_Mark => New_Occurrence_Of |
725a69d2 | 4327 | (RTE (RE_Dispatch_Table_Wrapper), Loc), |
4328 | Constraint => Make_Index_Or_Discriminant_Constraint (Loc, | |
4329 | Constraints => DT_Constr_List)), | |
4330 | ||
f301a57b | 4331 | Expression => |
4332 | Make_Aggregate (Loc, | |
4333 | Expressions => DT_Aggr_List))); | |
725a69d2 | 4334 | |
17e14451 | 4335 | Append_To (Result, |
4336 | Make_Attribute_Definition_Clause (Loc, | |
83c6c069 | 4337 | Name => New_Occurrence_Of (Iface_DT, Loc), |
17e14451 | 4338 | Chars => Name_Alignment, |
f301a57b | 4339 | |
17e14451 | 4340 | Expression => |
4341 | Make_Attribute_Reference (Loc, | |
f301a57b | 4342 | Prefix => |
83c6c069 | 4343 | New_Occurrence_Of (RTE (RE_Integer_Address), Loc), |
17e14451 | 4344 | Attribute_Name => Name_Alignment))); |
4345 | ||
f301a57b | 4346 | if Exporting_Table then |
4347 | Export_DT (Typ, Iface_DT, Suffix_Index); | |
4348 | ||
725a69d2 | 4349 | -- Generate code to create the pointer to the dispatch table |
4350 | ||
f301a57b | 4351 | -- Iface_DT_Ptr : Tag := Tag!(DT.Prims_Ptr'Address); |
725a69d2 | 4352 | |
f301a57b | 4353 | -- Note: This declaration is not added here if the table is exported |
4354 | -- because in such case Make_Tags has already added this declaration. | |
4355 | ||
4356 | else | |
4357 | Append_To (Result, | |
4358 | Make_Object_Declaration (Loc, | |
4359 | Defining_Identifier => Iface_DT_Ptr, | |
4360 | Constant_Present => True, | |
4361 | ||
4362 | Object_Definition => | |
83c6c069 | 4363 | New_Occurrence_Of (RTE (RE_Interface_Tag), Loc), |
f301a57b | 4364 | |
4365 | Expression => | |
4366 | Unchecked_Convert_To (RTE (RE_Interface_Tag), | |
4367 | Make_Attribute_Reference (Loc, | |
4368 | Prefix => | |
4369 | Make_Selected_Component (Loc, | |
83c6c069 | 4370 | Prefix => New_Occurrence_Of (Iface_DT, Loc), |
f301a57b | 4371 | Selector_Name => |
4372 | New_Occurrence_Of | |
4373 | (RTE_Record_Component (RE_Prims_Ptr), Loc)), | |
4374 | Attribute_Name => Name_Address)))); | |
4375 | end if; | |
725a69d2 | 4376 | |
acf97c11 | 4377 | Append_To (Result, |
4378 | Make_Object_Declaration (Loc, | |
4379 | Defining_Identifier => Predef_Prims_Ptr, | |
4380 | Constant_Present => True, | |
f301a57b | 4381 | |
4382 | Object_Definition => | |
83c6c069 | 4383 | New_Occurrence_Of (RTE (RE_Address), Loc), |
f301a57b | 4384 | |
4385 | Expression => | |
acf97c11 | 4386 | Make_Attribute_Reference (Loc, |
f301a57b | 4387 | Prefix => |
acf97c11 | 4388 | Make_Selected_Component (Loc, |
83c6c069 | 4389 | Prefix => New_Occurrence_Of (Iface_DT, Loc), |
f301a57b | 4390 | Selector_Name => |
4391 | New_Occurrence_Of | |
4392 | (RTE_Record_Component (RE_Predef_Prims), Loc)), | |
acf97c11 | 4393 | Attribute_Name => Name_Address))); |
4394 | ||
cc60bd16 | 4395 | -- Remember entities containing dispatch tables |
acf97c11 | 4396 | |
cc60bd16 | 4397 | Append_Elmt (Predef_Prims, DT_Decl); |
4398 | Append_Elmt (Iface_DT, DT_Decl); | |
725a69d2 | 4399 | end Make_Secondary_DT; |
4400 | ||
360b005f | 4401 | --------------------- |
4402 | -- Restore_Globals -- | |
4403 | --------------------- | |
4404 | ||
4405 | procedure Restore_Globals is | |
4406 | begin | |
4407 | Ghost_Mode := GM; | |
4408 | end Restore_Globals; | |
4409 | ||
725a69d2 | 4410 | -- Local variables |
4411 | ||
2ea346ac | 4412 | Elab_Code : constant List_Id := New_List; |
4413 | Result : constant List_Id := New_List; | |
4414 | Tname : constant Name_Id := Chars (Typ); | |
725a69d2 | 4415 | AI : Elmt_Id; |
cdb1c38f | 4416 | AI_Tag_Elmt : Elmt_Id; |
24971415 | 4417 | AI_Tag_Comp : Elmt_Id; |
f9162257 | 4418 | DT_Aggr_List : List_Id; |
24971415 | 4419 | DT_Constr_List : List_Id; |
725a69d2 | 4420 | DT_Ptr : Entity_Id; |
725a69d2 | 4421 | ITable : Node_Id; |
4422 | I_Depth : Nat := 0; | |
4423 | Iface_Table_Node : Node_Id; | |
4424 | Name_ITable : Name_Id; | |
725a69d2 | 4425 | Nb_Predef_Prims : Nat := 0; |
4426 | Nb_Prim : Nat := 0; | |
4427 | New_Node : Node_Id; | |
725a69d2 | 4428 | Num_Ifaces : Nat := 0; |
cc60bd16 | 4429 | Parent_Typ : Entity_Id; |
725a69d2 | 4430 | Prim : Entity_Id; |
4431 | Prim_Elmt : Elmt_Id; | |
4432 | Prim_Ops_Aggr_List : List_Id; | |
725a69d2 | 4433 | Suffix_Index : Int; |
4434 | Typ_Comps : Elist_Id; | |
4435 | Typ_Ifaces : Elist_Id; | |
4436 | TSD_Aggr_List : List_Id; | |
4437 | TSD_Tags_List : List_Id; | |
17e14451 | 4438 | |
4439 | -- The following name entries are used by Make_DT to generate a number | |
4440 | -- of entities related to a tagged type. These entities may be generated | |
4441 | -- in a scope other than that of the tagged type declaration, and if | |
4442 | -- the entities for two tagged types with the same name happen to be | |
4443 | -- generated in the same scope, we have to take care to use different | |
4444 | -- names. This is achieved by means of a unique serial number appended | |
4445 | -- to each generated entity name. | |
4446 | ||
4447 | Name_DT : constant Name_Id := | |
4448 | New_External_Name (Tname, 'T', Suffix_Index => -1); | |
4449 | Name_Exname : constant Name_Id := | |
4450 | New_External_Name (Tname, 'E', Suffix_Index => -1); | |
e7e688dd | 4451 | Name_HT_Link : constant Name_Id := |
4452 | New_External_Name (Tname, 'H', Suffix_Index => -1); | |
17e14451 | 4453 | Name_Predef_Prims : constant Name_Id := |
4454 | New_External_Name (Tname, 'R', Suffix_Index => -1); | |
4455 | Name_SSD : constant Name_Id := | |
4456 | New_External_Name (Tname, 'S', Suffix_Index => -1); | |
4457 | Name_TSD : constant Name_Id := | |
4458 | New_External_Name (Tname, 'B', Suffix_Index => -1); | |
4459 | ||
4460 | -- Entities built with above names | |
4461 | ||
4462 | DT : constant Entity_Id := | |
4463 | Make_Defining_Identifier (Loc, Name_DT); | |
4464 | Exname : constant Entity_Id := | |
4465 | Make_Defining_Identifier (Loc, Name_Exname); | |
e7e688dd | 4466 | HT_Link : constant Entity_Id := |
4467 | Make_Defining_Identifier (Loc, Name_HT_Link); | |
17e14451 | 4468 | Predef_Prims : constant Entity_Id := |
4469 | Make_Defining_Identifier (Loc, Name_Predef_Prims); | |
4470 | SSD : constant Entity_Id := | |
4471 | Make_Defining_Identifier (Loc, Name_SSD); | |
4472 | TSD : constant Entity_Id := | |
4473 | Make_Defining_Identifier (Loc, Name_TSD); | |
725a69d2 | 4474 | |
4475 | -- Start of processing for Make_DT | |
4476 | ||
4477 | begin | |
17e14451 | 4478 | pragma Assert (Is_Frozen (Typ)); |
725a69d2 | 4479 | |
360b005f | 4480 | -- The tagged type for which the dispatch table is being build may be |
4481 | -- subject to pragma Ghost with policy Ignore. Set the mode now to | |
4482 | -- ensure that any nodes generated during freezing are properly flagged | |
4483 | -- as ignored Ghost. | |
4484 | ||
4485 | Set_Ghost_Mode_For_Freeze (Typ, Typ); | |
4486 | ||
17e14451 | 4487 | -- Handle cases in which there is no need to build the dispatch table |
725a69d2 | 4488 | |
17e14451 | 4489 | if Has_Dispatch_Table (Typ) |
4490 | or else No (Access_Disp_Table (Typ)) | |
4491 | or else Is_CPP_Class (Typ) | |
b46aca2b | 4492 | or else Convention (Typ) = Convention_CIL |
4493 | or else Convention (Typ) = Convention_Java | |
17e14451 | 4494 | then |
360b005f | 4495 | Restore_Globals; |
725a69d2 | 4496 | return Result; |
725a69d2 | 4497 | |
17e14451 | 4498 | elsif No_Run_Time_Mode then |
4499 | Error_Msg_CRT ("tagged types", Typ); | |
360b005f | 4500 | Restore_Globals; |
17e14451 | 4501 | return Result; |
725a69d2 | 4502 | |
17e14451 | 4503 | elsif not RTE_Available (RE_Tag) then |
725a69d2 | 4504 | Append_To (Result, |
4505 | Make_Object_Declaration (Loc, | |
17e14451 | 4506 | Defining_Identifier => Node (First_Elmt |
4507 | (Access_Disp_Table (Typ))), | |
83c6c069 | 4508 | Object_Definition => New_Occurrence_Of (RTE (RE_Tag), Loc), |
725a69d2 | 4509 | Constant_Present => True, |
4510 | Expression => | |
24971415 | 4511 | Unchecked_Convert_To (RTE (RE_Tag), |
83c6c069 | 4512 | New_Occurrence_Of (RTE (RE_Null_Address), Loc)))); |
725a69d2 | 4513 | |
4514 | Analyze_List (Result, Suppress => All_Checks); | |
4515 | Error_Msg_CRT ("tagged types", Typ); | |
360b005f | 4516 | Restore_Globals; |
725a69d2 | 4517 | return Result; |
4518 | end if; | |
4519 | ||
17e14451 | 4520 | -- Ensure that the value of Max_Predef_Prims defined in a-tags is |
208fd589 | 4521 | -- correct. Valid values are 9 under configurable runtime or 15 |
17e14451 | 4522 | -- with full runtime. |
4523 | ||
4524 | if RTE_Available (RE_Interface_Data) then | |
208fd589 | 4525 | if Max_Predef_Prims /= 15 then |
17e14451 | 4526 | Error_Msg_N ("run-time library configuration error", Typ); |
360b005f | 4527 | Restore_Globals; |
17e14451 | 4528 | return Result; |
4529 | end if; | |
725a69d2 | 4530 | else |
208fd589 | 4531 | if Max_Predef_Prims /= 9 then |
17e14451 | 4532 | Error_Msg_N ("run-time library configuration error", Typ); |
4533 | Error_Msg_CRT ("tagged types", Typ); | |
360b005f | 4534 | Restore_Globals; |
17e14451 | 4535 | return Result; |
4536 | end if; | |
725a69d2 | 4537 | end if; |
4538 | ||
cc60bd16 | 4539 | -- Initialize Parent_Typ handling private types |
4540 | ||
4541 | Parent_Typ := Etype (Typ); | |
4542 | ||
4543 | if Present (Full_View (Parent_Typ)) then | |
4544 | Parent_Typ := Full_View (Parent_Typ); | |
4545 | end if; | |
4546 | ||
17e14451 | 4547 | -- Ensure that all the primitives are frozen. This is only required when |
4548 | -- building static dispatch tables --- the primitives must be frozen to | |
4549 | -- be referenced (otherwise we have problems with the backend). It is | |
4550 | -- not a requirement with nonstatic dispatch tables because in this case | |
4551 | -- we generate now an empty dispatch table; the extra code required to | |
24971415 | 4552 | -- register the primitives in the slots will be generated later --- when |
17e14451 | 4553 | -- each primitive is frozen (see Freeze_Subprogram). |
725a69d2 | 4554 | |
d00681a7 | 4555 | if Building_Static_DT (Typ) then |
17e14451 | 4556 | declare |
4557 | Save : constant Boolean := Freezing_Library_Level_Tagged_Type; | |
555c63a6 | 4558 | Prim : Entity_Id; |
17e14451 | 4559 | Prim_Elmt : Elmt_Id; |
4560 | Frnodes : List_Id; | |
725a69d2 | 4561 | |
17e14451 | 4562 | begin |
4563 | Freezing_Library_Level_Tagged_Type := True; | |
555c63a6 | 4564 | |
17e14451 | 4565 | Prim_Elmt := First_Elmt (Primitive_Operations (Typ)); |
4566 | while Present (Prim_Elmt) loop | |
555c63a6 | 4567 | Prim := Node (Prim_Elmt); |
d74fc39a | 4568 | Frnodes := Freeze_Entity (Prim, Typ); |
725a69d2 | 4569 | |
17e14451 | 4570 | declare |
17e14451 | 4571 | F : Entity_Id; |
725a69d2 | 4572 | |
17e14451 | 4573 | begin |
555c63a6 | 4574 | F := First_Formal (Prim); |
17e14451 | 4575 | while Present (F) loop |
349db231 | 4576 | Check_Premature_Freezing (Prim, Typ, Etype (F)); |
17e14451 | 4577 | Next_Formal (F); |
4578 | end loop; | |
4579 | ||
349db231 | 4580 | Check_Premature_Freezing (Prim, Typ, Etype (Prim)); |
17e14451 | 4581 | end; |
4582 | ||
4583 | if Present (Frnodes) then | |
4584 | Append_List_To (Result, Frnodes); | |
4585 | end if; | |
4586 | ||
4587 | Next_Elmt (Prim_Elmt); | |
4588 | end loop; | |
555c63a6 | 4589 | |
17e14451 | 4590 | Freezing_Library_Level_Tagged_Type := Save; |
4591 | end; | |
4592 | end if; | |
725a69d2 | 4593 | |
17e14451 | 4594 | -- Ada 2005 (AI-251): Build the secondary dispatch tables |
4595 | ||
a652dd51 | 4596 | if Has_Interfaces (Typ) then |
17e14451 | 4597 | Collect_Interface_Components (Typ, Typ_Comps); |
4598 | ||
f301a57b | 4599 | -- Each secondary dispatch table is assigned an unique positive |
4600 | -- suffix index; such value also corresponds with the location of | |
4601 | -- its entity in the Dispatch_Table_Wrappers list (see Make_Tags). | |
4602 | ||
4603 | -- Note: This value must be kept sync with the Suffix_Index values | |
4604 | -- generated by Make_Tags | |
4605 | ||
4606 | Suffix_Index := 1; | |
acf97c11 | 4607 | AI_Tag_Elmt := |
4608 | Next_Elmt (Next_Elmt (First_Elmt (Access_Disp_Table (Typ)))); | |
17e14451 | 4609 | |
4610 | AI_Tag_Comp := First_Elmt (Typ_Comps); | |
4611 | while Present (AI_Tag_Comp) loop | |
d00681a7 | 4612 | pragma Assert (Has_Suffix (Node (AI_Tag_Elmt), 'P')); |
cdb1c38f | 4613 | |
4614 | -- Build the secondary table containing pointers to thunks | |
4615 | ||
17e14451 | 4616 | Make_Secondary_DT |
02a2406d | 4617 | (Typ => Typ, |
4618 | Iface => Base_Type | |
4619 | (Related_Type (Node (AI_Tag_Comp))), | |
4620 | Suffix_Index => Suffix_Index, | |
4621 | Num_Iface_Prims => UI_To_Int | |
4622 | (DT_Entry_Count (Node (AI_Tag_Comp))), | |
4623 | Iface_DT_Ptr => Node (AI_Tag_Elmt), | |
acf97c11 | 4624 | Predef_Prims_Ptr => Node (Next_Elmt (AI_Tag_Elmt)), |
02a2406d | 4625 | Build_Thunks => True, |
4626 | Result => Result); | |
cdb1c38f | 4627 | |
d00681a7 | 4628 | -- Skip secondary dispatch table referencing thunks to predefined |
4629 | -- primitives. | |
acf97c11 | 4630 | |
f301a57b | 4631 | Next_Elmt (AI_Tag_Elmt); |
d00681a7 | 4632 | pragma Assert (Has_Suffix (Node (AI_Tag_Elmt), 'Y')); |
4633 | ||
4634 | -- Secondary dispatch table referencing user-defined primitives | |
4635 | -- covered by this interface. | |
4636 | ||
acf97c11 | 4637 | Next_Elmt (AI_Tag_Elmt); |
d00681a7 | 4638 | pragma Assert (Has_Suffix (Node (AI_Tag_Elmt), 'D')); |
acf97c11 | 4639 | |
36b938a3 | 4640 | -- Build the secondary table containing pointers to primitives |
cdb1c38f | 4641 | -- (used to give support to Generic Dispatching Constructors). |
4642 | ||
4643 | Make_Secondary_DT | |
d00681a7 | 4644 | (Typ => Typ, |
4645 | Iface => Base_Type | |
4646 | (Related_Type (Node (AI_Tag_Comp))), | |
4647 | Suffix_Index => -1, | |
4648 | Num_Iface_Prims => UI_To_Int | |
4649 | (DT_Entry_Count (Node (AI_Tag_Comp))), | |
4650 | Iface_DT_Ptr => Node (AI_Tag_Elmt), | |
4651 | Predef_Prims_Ptr => Node (Next_Elmt (AI_Tag_Elmt)), | |
4652 | Build_Thunks => False, | |
4653 | Result => Result); | |
4654 | ||
4655 | -- Skip secondary dispatch table referencing predefined primitives | |
acf97c11 | 4656 | |
f301a57b | 4657 | Next_Elmt (AI_Tag_Elmt); |
d00681a7 | 4658 | pragma Assert (Has_Suffix (Node (AI_Tag_Elmt), 'Z')); |
acf97c11 | 4659 | |
17e14451 | 4660 | Suffix_Index := Suffix_Index + 1; |
d00681a7 | 4661 | Next_Elmt (AI_Tag_Elmt); |
17e14451 | 4662 | Next_Elmt (AI_Tag_Comp); |
4663 | end loop; | |
4664 | end if; | |
725a69d2 | 4665 | |
c6a30f24 | 4666 | -- Get the _tag entity and number of primitives of its dispatch table |
725a69d2 | 4667 | |
24971415 | 4668 | DT_Ptr := Node (First_Elmt (Access_Disp_Table (Typ))); |
4669 | Nb_Prim := UI_To_Int (DT_Entry_Count (First_Tag_Component (Typ))); | |
725a69d2 | 4670 | |
2ea346ac | 4671 | Set_Is_Statically_Allocated (DT, Is_Library_Level_Tagged_Type (Typ)); |
4672 | Set_Is_Statically_Allocated (SSD, Is_Library_Level_Tagged_Type (Typ)); | |
4673 | Set_Is_Statically_Allocated (TSD, Is_Library_Level_Tagged_Type (Typ)); | |
4674 | Set_Is_Statically_Allocated (Predef_Prims, | |
4675 | Is_Library_Level_Tagged_Type (Typ)); | |
725a69d2 | 4676 | |
4677 | -- In case of locally defined tagged type we declare the object | |
36b938a3 | 4678 | -- containing the dispatch table by means of a variable. Its |
725a69d2 | 4679 | -- initialization is done later by means of an assignment. This is |
4680 | -- required to generate its External_Tag. | |
4681 | ||
24971415 | 4682 | if not Building_Static_DT (Typ) then |
725a69d2 | 4683 | |
4684 | -- Generate: | |
4685 | -- DT : No_Dispatch_Table_Wrapper; | |
17e14451 | 4686 | -- for DT'Alignment use Address'Alignment; |
725a69d2 | 4687 | -- DT_Ptr : Tag := !Tag (DT.NDT_Prims_Ptr'Address); |
4688 | ||
24971415 | 4689 | if not Has_DT (Typ) then |
725a69d2 | 4690 | Append_To (Result, |
4691 | Make_Object_Declaration (Loc, | |
4692 | Defining_Identifier => DT, | |
4693 | Aliased_Present => True, | |
4694 | Constant_Present => False, | |
4695 | Object_Definition => | |
83c6c069 | 4696 | New_Occurrence_Of |
725a69d2 | 4697 | (RTE (RE_No_Dispatch_Table_Wrapper), Loc))); |
4698 | ||
17e14451 | 4699 | Append_To (Result, |
4700 | Make_Attribute_Definition_Clause (Loc, | |
83c6c069 | 4701 | Name => New_Occurrence_Of (DT, Loc), |
17e14451 | 4702 | Chars => Name_Alignment, |
4703 | Expression => | |
4704 | Make_Attribute_Reference (Loc, | |
02a2406d | 4705 | Prefix => |
83c6c069 | 4706 | New_Occurrence_Of (RTE (RE_Integer_Address), Loc), |
17e14451 | 4707 | Attribute_Name => Name_Alignment))); |
4708 | ||
725a69d2 | 4709 | Append_To (Result, |
4710 | Make_Object_Declaration (Loc, | |
4711 | Defining_Identifier => DT_Ptr, | |
83c6c069 | 4712 | Object_Definition => New_Occurrence_Of (RTE (RE_Tag), Loc), |
725a69d2 | 4713 | Constant_Present => True, |
4714 | Expression => | |
24971415 | 4715 | Unchecked_Convert_To (RTE (RE_Tag), |
725a69d2 | 4716 | Make_Attribute_Reference (Loc, |
02a2406d | 4717 | Prefix => |
725a69d2 | 4718 | Make_Selected_Component (Loc, |
02a2406d | 4719 | Prefix => New_Occurrence_Of (DT, Loc), |
4720 | Selector_Name => | |
4721 | New_Occurrence_Of | |
4722 | (RTE_Record_Component (RE_NDT_Prims_Ptr), Loc)), | |
725a69d2 | 4723 | Attribute_Name => Name_Address)))); |
4724 | ||
ff6293ec | 4725 | Set_Is_Statically_Allocated (DT_Ptr, |
4726 | Is_Library_Level_Tagged_Type (Typ)); | |
4727 | ||
98045ff0 | 4728 | -- Generate the SCIL node for the previous object declaration |
4729 | -- because it has a tag initialization. | |
4730 | ||
3dbca0d5 | 4731 | if Generate_SCIL then |
d215f619 | 4732 | New_Node := |
4733 | Make_SCIL_Dispatch_Table_Tag_Init (Sloc (Last (Result))); | |
d215f619 | 4734 | Set_SCIL_Entity (New_Node, Typ); |
5a44b136 | 4735 | Set_SCIL_Node (Last (Result), New_Node); |
3dbca0d5 | 4736 | end if; |
4737 | ||
725a69d2 | 4738 | -- Generate: |
4739 | -- DT : Dispatch_Table_Wrapper (Nb_Prim); | |
4740 | -- for DT'Alignment use Address'Alignment; | |
4741 | -- DT_Ptr : Tag := !Tag (DT.Prims_Ptr'Address); | |
4742 | ||
4743 | else | |
4744 | -- If the tagged type has no primitives we add a dummy slot | |
4745 | -- whose address will be the tag of this type. | |
4746 | ||
4747 | if Nb_Prim = 0 then | |
4748 | DT_Constr_List := | |
4749 | New_List (Make_Integer_Literal (Loc, 1)); | |
4750 | else | |
4751 | DT_Constr_List := | |
4752 | New_List (Make_Integer_Literal (Loc, Nb_Prim)); | |
4753 | end if; | |
4754 | ||
4755 | Append_To (Result, | |
4756 | Make_Object_Declaration (Loc, | |
4757 | Defining_Identifier => DT, | |
4758 | Aliased_Present => True, | |
4759 | Constant_Present => False, | |
4760 | Object_Definition => | |
4761 | Make_Subtype_Indication (Loc, | |
4762 | Subtype_Mark => | |
83c6c069 | 4763 | New_Occurrence_Of (RTE (RE_Dispatch_Table_Wrapper), Loc), |
02a2406d | 4764 | Constraint => |
4765 | Make_Index_Or_Discriminant_Constraint (Loc, | |
4766 | Constraints => DT_Constr_List)))); | |
725a69d2 | 4767 | |
4768 | Append_To (Result, | |
4769 | Make_Attribute_Definition_Clause (Loc, | |
83c6c069 | 4770 | Name => New_Occurrence_Of (DT, Loc), |
725a69d2 | 4771 | Chars => Name_Alignment, |
4772 | Expression => | |
4773 | Make_Attribute_Reference (Loc, | |
02a2406d | 4774 | Prefix => |
83c6c069 | 4775 | New_Occurrence_Of (RTE (RE_Integer_Address), Loc), |
725a69d2 | 4776 | Attribute_Name => Name_Alignment))); |
4777 | ||
4778 | Append_To (Result, | |
4779 | Make_Object_Declaration (Loc, | |
4780 | Defining_Identifier => DT_Ptr, | |
83c6c069 | 4781 | Object_Definition => New_Occurrence_Of (RTE (RE_Tag), Loc), |
725a69d2 | 4782 | Constant_Present => True, |
4783 | Expression => | |
24971415 | 4784 | Unchecked_Convert_To (RTE (RE_Tag), |
725a69d2 | 4785 | Make_Attribute_Reference (Loc, |
02a2406d | 4786 | Prefix => |
725a69d2 | 4787 | Make_Selected_Component (Loc, |
02a2406d | 4788 | Prefix => New_Occurrence_Of (DT, Loc), |
4789 | Selector_Name => | |
4790 | New_Occurrence_Of | |
4791 | (RTE_Record_Component (RE_Prims_Ptr), Loc)), | |
725a69d2 | 4792 | Attribute_Name => Name_Address)))); |
acf97c11 | 4793 | |
ff6293ec | 4794 | Set_Is_Statically_Allocated (DT_Ptr, |
4795 | Is_Library_Level_Tagged_Type (Typ)); | |
4796 | ||
98045ff0 | 4797 | -- Generate the SCIL node for the previous object declaration |
4798 | -- because it has a tag initialization. | |
9af28f61 | 4799 | |
3dbca0d5 | 4800 | if Generate_SCIL then |
d215f619 | 4801 | New_Node := |
4802 | Make_SCIL_Dispatch_Table_Tag_Init (Sloc (Last (Result))); | |
d215f619 | 4803 | Set_SCIL_Entity (New_Node, Typ); |
5a44b136 | 4804 | Set_SCIL_Node (Last (Result), New_Node); |
3dbca0d5 | 4805 | end if; |
4806 | ||
acf97c11 | 4807 | Append_To (Result, |
4808 | Make_Object_Declaration (Loc, | |
4809 | Defining_Identifier => | |
4810 | Node (Next_Elmt (First_Elmt (Access_Disp_Table (Typ)))), | |
4811 | Constant_Present => True, | |
02a2406d | 4812 | Object_Definition => |
4813 | New_Occurrence_Of (RTE (RE_Address), Loc), | |
acf97c11 | 4814 | Expression => |
4815 | Make_Attribute_Reference (Loc, | |
02a2406d | 4816 | Prefix => |
acf97c11 | 4817 | Make_Selected_Component (Loc, |
02a2406d | 4818 | Prefix => New_Occurrence_Of (DT, Loc), |
4819 | Selector_Name => | |
4820 | New_Occurrence_Of | |
4821 | (RTE_Record_Component (RE_Predef_Prims), Loc)), | |
acf97c11 | 4822 | Attribute_Name => Name_Address))); |
725a69d2 | 4823 | end if; |
4824 | end if; | |
4825 | ||
4826 | -- Generate: Exname : constant String := full_qualified_name (typ); | |
343d35dc | 4827 | -- The type itself may be an anonymous parent type, so use the first |
4828 | -- subtype to have a user-recognizable name. | |
d62940bf | 4829 | |
343d35dc | 4830 | Append_To (Result, |
4831 | Make_Object_Declaration (Loc, | |
4832 | Defining_Identifier => Exname, | |
4833 | Constant_Present => True, | |
83c6c069 | 4834 | Object_Definition => New_Occurrence_Of (Standard_String, Loc), |
343d35dc | 4835 | Expression => |
4836 | Make_String_Literal (Loc, | |
02a2406d | 4837 | Strval => Fully_Qualified_Name_String (First_Subtype (Typ))))); |
24971415 | 4838 | Set_Is_Statically_Allocated (Exname); |
4839 | Set_Is_True_Constant (Exname); | |
4840 | ||
e7e688dd | 4841 | -- Declare the object used by Ada.Tags.Register_Tag |
4842 | ||
4843 | if RTE_Available (RE_Register_Tag) then | |
4844 | Append_To (Result, | |
4845 | Make_Object_Declaration (Loc, | |
4846 | Defining_Identifier => HT_Link, | |
83c6c069 | 4847 | Object_Definition => New_Occurrence_Of (RTE (RE_Tag), Loc))); |
e7e688dd | 4848 | end if; |
4849 | ||
725a69d2 | 4850 | -- Generate code to create the storage for the type specific data object |
4851 | -- with enough space to store the tags of the ancestors plus the tags | |
4852 | -- of all the implemented interfaces (as described in a-tags.adb). | |
4853 | ||
4854 | -- TSD : Type_Specific_Data (I_Depth) := | |
4855 | -- (Idepth => I_Depth, | |
4856 | -- Access_Level => Type_Access_Level (Typ), | |
208fd589 | 4857 | -- Alignment => Typ'Alignment, |
725a69d2 | 4858 | -- Expanded_Name => Cstring_Ptr!(Exname'Address)) |
4859 | -- External_Tag => Cstring_Ptr!(Exname'Address)) | |
e7e688dd | 4860 | -- HT_Link => HT_Link'Address, |
725a69d2 | 4861 | -- Transportable => <<boolean-value>>, |
3568e554 | 4862 | -- Type_Is_Abstract => <<boolean-value>>, |
bb3b440a | 4863 | -- Needs_Finalization => <<boolean-value>>, |
693b0822 | 4864 | -- [ Size_Func => Size_Prim'Access, ] |
4865 | -- [ Interfaces_Table => <<access-value>>, ] | |
24971415 | 4866 | -- [ SSD => SSD_Table'Address ] |
725a69d2 | 4867 | -- Tags_Table => (0 => null, |
4868 | -- 1 => Parent'Tag | |
4869 | -- ...); | |
4870 | -- for TSD'Alignment use Address'Alignment | |
4871 | ||
4872 | TSD_Aggr_List := New_List; | |
4873 | ||
4874 | -- Idepth: Count ancestors to compute the inheritance depth. For private | |
4875 | -- extensions, always go to the full view in order to compute the real | |
4876 | -- inheritance depth. | |
4877 | ||
4878 | declare | |
4879 | Current_Typ : Entity_Id; | |
4880 | Parent_Typ : Entity_Id; | |
4881 | ||
4882 | begin | |
4883 | I_Depth := 0; | |
4884 | Current_Typ := Typ; | |
4885 | loop | |
4886 | Parent_Typ := Etype (Current_Typ); | |
4887 | ||
4888 | if Is_Private_Type (Parent_Typ) then | |
4889 | Parent_Typ := Full_View (Base_Type (Parent_Typ)); | |
4890 | end if; | |
4891 | ||
4892 | exit when Parent_Typ = Current_Typ; | |
4893 | ||
4894 | I_Depth := I_Depth + 1; | |
4895 | Current_Typ := Parent_Typ; | |
4896 | end loop; | |
4897 | end; | |
4898 | ||
4899 | Append_To (TSD_Aggr_List, | |
17e14451 | 4900 | Make_Integer_Literal (Loc, I_Depth)); |
725a69d2 | 4901 | |
4902 | -- Access_Level | |
4903 | ||
4904 | Append_To (TSD_Aggr_List, | |
17e14451 | 4905 | Make_Integer_Literal (Loc, Type_Access_Level (Typ))); |
725a69d2 | 4906 | |
208fd589 | 4907 | -- Alignment |
4908 | ||
4909 | -- For CPP types we cannot rely on the value of 'Alignment provided | |
4910 | -- by the backend to initialize this TSD field. | |
4911 | ||
4912 | if Convention (Typ) = Convention_CPP | |
4913 | or else Is_CPP_Class (Root_Type (Typ)) | |
4914 | then | |
4915 | Append_To (TSD_Aggr_List, | |
4916 | Make_Integer_Literal (Loc, 0)); | |
4917 | else | |
4918 | Append_To (TSD_Aggr_List, | |
4919 | Make_Attribute_Reference (Loc, | |
02a2406d | 4920 | Prefix => New_Occurrence_Of (Typ, Loc), |
208fd589 | 4921 | Attribute_Name => Name_Alignment)); |
4922 | end if; | |
4923 | ||
725a69d2 | 4924 | -- Expanded_Name |
4925 | ||
4926 | Append_To (TSD_Aggr_List, | |
17e14451 | 4927 | Unchecked_Convert_To (RTE (RE_Cstring_Ptr), |
4928 | Make_Attribute_Reference (Loc, | |
83c6c069 | 4929 | Prefix => New_Occurrence_Of (Exname, Loc), |
17e14451 | 4930 | Attribute_Name => Name_Address))); |
725a69d2 | 4931 | |
4932 | -- External_Tag of a local tagged type | |
4933 | ||
17e14451 | 4934 | -- <typ>A : constant String := |
725a69d2 | 4935 | -- "Internal tag at 16#tag-addr#: <full-name-of-typ>"; |
4936 | ||
4937 | -- The reason we generate this strange name is that we do not want to | |
4938 | -- enter local tagged types in the global hash table used to compute | |
4939 | -- the Internal_Tag attribute for two reasons: | |
4940 | ||
4941 | -- 1. It is hard to avoid a tasking race condition for entering the | |
4942 | -- entry into the hash table. | |
4943 | ||
4944 | -- 2. It would cause a storage leak, unless we rig up considerable | |
4945 | -- mechanism to remove the entry from the hash table on exit. | |
4946 | ||
4947 | -- So what we do is to generate the above external tag name, where the | |
4948 | -- hex address is the address of the local dispatch table (i.e. exactly | |
4949 | -- the value we want if Internal_Tag is computed from this string). | |
4950 | ||
4951 | -- Of course this value will only be valid if the tagged type is still | |
4952 | -- in scope, but it clearly must be erroneous to compute the internal | |
39a0c1d3 | 4953 | -- tag of a tagged type that is out of scope. |
725a69d2 | 4954 | |
17e14451 | 4955 | -- We don't do this processing if an explicit external tag has been |
4956 | -- specified. That's an odd case for which we have already issued a | |
4957 | -- warning, where we will not be able to compute the internal tag. | |
4958 | ||
4959 | if not Is_Library_Level_Entity (Typ) | |
4960 | and then not Has_External_Tag_Rep_Clause (Typ) | |
4961 | then | |
725a69d2 | 4962 | declare |
02a2406d | 4963 | Exname : constant Entity_Id := |
4964 | Make_Defining_Identifier (Loc, | |
4965 | Chars => New_External_Name (Tname, 'A')); | |
4966 | Full_Name : constant String_Id := | |
c6a30f24 | 4967 | Fully_Qualified_Name_String (First_Subtype (Typ)); |
02a2406d | 4968 | Str1_Id : String_Id; |
4969 | Str2_Id : String_Id; | |
725a69d2 | 4970 | |
4971 | begin | |
4972 | -- Generate: | |
17e14451 | 4973 | -- Str1 = "Internal tag at 16#"; |
725a69d2 | 4974 | |
4975 | Start_String; | |
4976 | Store_String_Chars ("Internal tag at 16#"); | |
4977 | Str1_Id := End_String; | |
4978 | ||
4979 | -- Generate: | |
17e14451 | 4980 | -- Str2 = "#: <type-full-name>"; |
725a69d2 | 4981 | |
4982 | Start_String; | |
4983 | Store_String_Chars ("#: "); | |
725a69d2 | 4984 | Store_String_Chars (Full_Name); |
17e14451 | 4985 | Str2_Id := End_String; |
725a69d2 | 4986 | |
4987 | -- Generate: | |
4988 | -- Exname : constant String := | |
17e14451 | 4989 | -- Str1 & Address_Image (Tag) & Str2; |
725a69d2 | 4990 | |
4991 | if RTE_Available (RE_Address_Image) then | |
4992 | Append_To (Result, | |
4993 | Make_Object_Declaration (Loc, | |
4994 | Defining_Identifier => Exname, | |
4995 | Constant_Present => True, | |
83c6c069 | 4996 | Object_Definition => New_Occurrence_Of |
725a69d2 | 4997 | (Standard_String, Loc), |
4998 | Expression => | |
4999 | Make_Op_Concat (Loc, | |
02a2406d | 5000 | Left_Opnd => Make_String_Literal (Loc, Str1_Id), |
725a69d2 | 5001 | Right_Opnd => |
5002 | Make_Op_Concat (Loc, | |
02a2406d | 5003 | Left_Opnd => |
725a69d2 | 5004 | Make_Function_Call (Loc, |
5005 | Name => | |
83c6c069 | 5006 | New_Occurrence_Of |
725a69d2 | 5007 | (RTE (RE_Address_Image), Loc), |
5008 | Parameter_Associations => New_List ( | |
5009 | Unchecked_Convert_To (RTE (RE_Address), | |
83c6c069 | 5010 | New_Occurrence_Of (DT_Ptr, Loc)))), |
725a69d2 | 5011 | Right_Opnd => |
17e14451 | 5012 | Make_String_Literal (Loc, Str2_Id))))); |
5013 | ||
725a69d2 | 5014 | else |
5015 | Append_To (Result, | |
5016 | Make_Object_Declaration (Loc, | |
5017 | Defining_Identifier => Exname, | |
5018 | Constant_Present => True, | |
02a2406d | 5019 | Object_Definition => |
5020 | New_Occurrence_Of (Standard_String, Loc), | |
5021 | Expression => | |
725a69d2 | 5022 | Make_Op_Concat (Loc, |
02a2406d | 5023 | Left_Opnd => Make_String_Literal (Loc, Str1_Id), |
5024 | Right_Opnd => Make_String_Literal (Loc, Str2_Id)))); | |
725a69d2 | 5025 | end if; |
5026 | ||
5027 | New_Node := | |
5028 | Unchecked_Convert_To (RTE (RE_Cstring_Ptr), | |
5029 | Make_Attribute_Reference (Loc, | |
02a2406d | 5030 | Prefix => New_Occurrence_Of (Exname, Loc), |
725a69d2 | 5031 | Attribute_Name => Name_Address)); |
5032 | end; | |
5033 | ||
5034 | -- External tag of a library-level tagged type: Check for a definition | |
5035 | -- of External_Tag. The clause is considered only if it applies to this | |
5036 | -- specific tagged type, as opposed to one of its ancestors. | |
cc60bd16 | 5037 | -- If the type is an unconstrained type extension, we are building the |
5038 | -- dispatch table of its anonymous base type, so the external tag, if | |
34fd8639 | 5039 | -- any was specified, must be retrieved from the first subtype. Go to |
5040 | -- the full view in case the clause is in the private part. | |
725a69d2 | 5041 | |
5042 | else | |
5043 | declare | |
cc60bd16 | 5044 | Def : constant Node_Id := Get_Attribute_Definition_Clause |
34fd8639 | 5045 | (Underlying_Type (First_Subtype (Typ)), |
cc60bd16 | 5046 | Attribute_External_Tag); |
5047 | ||
725a69d2 | 5048 | Old_Val : String_Id; |
5049 | New_Val : String_Id; | |
5050 | E : Entity_Id; | |
5051 | ||
5052 | begin | |
5053 | if not Present (Def) | |
cc60bd16 | 5054 | or else Entity (Name (Def)) /= First_Subtype (Typ) |
725a69d2 | 5055 | then |
5056 | New_Node := | |
5057 | Unchecked_Convert_To (RTE (RE_Cstring_Ptr), | |
5058 | Make_Attribute_Reference (Loc, | |
83c6c069 | 5059 | Prefix => New_Occurrence_Of (Exname, Loc), |
725a69d2 | 5060 | Attribute_Name => Name_Address)); |
5061 | else | |
5062 | Old_Val := Strval (Expr_Value_S (Expression (Def))); | |
5063 | ||
17e14451 | 5064 | -- For the rep clause "for <typ>'external_tag use y" generate: |
725a69d2 | 5065 | |
17e14451 | 5066 | -- <typ>A : constant string := y; |
5067 | -- | |
5068 | -- <typ>A'Address is used to set the External_Tag component | |
5069 | -- of the TSD | |
725a69d2 | 5070 | |
5071 | -- Create a new nul terminated string if it is not already | |
5072 | ||
5073 | if String_Length (Old_Val) > 0 | |
5074 | and then | |
5075 | Get_String_Char (Old_Val, String_Length (Old_Val)) = 0 | |
5076 | then | |
5077 | New_Val := Old_Val; | |
5078 | else | |
5079 | Start_String (Old_Val); | |
5080 | Store_String_Char (Get_Char_Code (ASCII.NUL)); | |
5081 | New_Val := End_String; | |
5082 | end if; | |
5083 | ||
5084 | E := Make_Defining_Identifier (Loc, | |
5085 | New_External_Name (Chars (Typ), 'A')); | |
5086 | ||
5087 | Append_To (Result, | |
5088 | Make_Object_Declaration (Loc, | |
5089 | Defining_Identifier => E, | |
5090 | Constant_Present => True, | |
5091 | Object_Definition => | |
83c6c069 | 5092 | New_Occurrence_Of (Standard_String, Loc), |
725a69d2 | 5093 | Expression => |
5094 | Make_String_Literal (Loc, New_Val))); | |
5095 | ||
5096 | New_Node := | |
5097 | Unchecked_Convert_To (RTE (RE_Cstring_Ptr), | |
5098 | Make_Attribute_Reference (Loc, | |
02a2406d | 5099 | Prefix => New_Occurrence_Of (E, Loc), |
725a69d2 | 5100 | Attribute_Name => Name_Address)); |
5101 | end if; | |
5102 | end; | |
5103 | end if; | |
5104 | ||
17e14451 | 5105 | Append_To (TSD_Aggr_List, New_Node); |
725a69d2 | 5106 | |
5107 | -- HT_Link | |
5108 | ||
e7e688dd | 5109 | if RTE_Available (RE_Register_Tag) then |
5110 | Append_To (TSD_Aggr_List, | |
5111 | Unchecked_Convert_To (RTE (RE_Tag_Ptr), | |
5112 | Make_Attribute_Reference (Loc, | |
02a2406d | 5113 | Prefix => New_Occurrence_Of (HT_Link, Loc), |
e7e688dd | 5114 | Attribute_Name => Name_Address))); |
5115 | else | |
5116 | Append_To (TSD_Aggr_List, | |
5117 | Unchecked_Convert_To (RTE (RE_Tag_Ptr), | |
83c6c069 | 5118 | New_Occurrence_Of (RTE (RE_Null_Address), Loc))); |
e7e688dd | 5119 | end if; |
725a69d2 | 5120 | |
5121 | -- Transportable: Set for types that can be used in remote calls | |
5122 | -- with respect to E.4(18) legality rules. | |
5123 | ||
17e14451 | 5124 | declare |
5125 | Transportable : Entity_Id; | |
725a69d2 | 5126 | |
17e14451 | 5127 | begin |
5128 | Transportable := | |
5129 | Boolean_Literals | |
5130 | (Is_Pure (Typ) | |
5131 | or else Is_Shared_Passive (Typ) | |
5132 | or else | |
5133 | ((Is_Remote_Types (Typ) | |
02a2406d | 5134 | or else Is_Remote_Call_Interface (Typ)) |
17e14451 | 5135 | and then Original_View_In_Visible_Part (Typ)) |
5136 | or else not Comes_From_Source (Typ)); | |
5137 | ||
5138 | Append_To (TSD_Aggr_List, | |
5139 | New_Occurrence_Of (Transportable, Loc)); | |
5140 | end; | |
725a69d2 | 5141 | |
3568e554 | 5142 | -- Type_Is_Abstract (Ada 2012: AI05-0173). This functionality is |
5143 | -- not available in the HIE runtime. | |
5144 | ||
5145 | if RTE_Record_Component_Available (RE_Type_Is_Abstract) then | |
5146 | declare | |
5147 | Type_Is_Abstract : Entity_Id; | |
3568e554 | 5148 | begin |
02a2406d | 5149 | Type_Is_Abstract := Boolean_Literals (Is_Abstract_Type (Typ)); |
3568e554 | 5150 | Append_To (TSD_Aggr_List, |
02a2406d | 5151 | New_Occurrence_Of (Type_Is_Abstract, Loc)); |
3568e554 | 5152 | end; |
5153 | end if; | |
5154 | ||
bb3b440a | 5155 | -- Needs_Finalization: Set if the type is controlled or has controlled |
5156 | -- components. | |
952af0b9 | 5157 | |
17e14451 | 5158 | declare |
bb3b440a | 5159 | Needs_Fin : Entity_Id; |
17e14451 | 5160 | begin |
bb3b440a | 5161 | Needs_Fin := Boolean_Literals (Needs_Finalization (Typ)); |
5162 | Append_To (TSD_Aggr_List, New_Occurrence_Of (Needs_Fin, Loc)); | |
17e14451 | 5163 | end; |
725a69d2 | 5164 | |
cc60bd16 | 5165 | -- Size_Func |
5166 | ||
5167 | if RTE_Record_Component_Available (RE_Size_Func) then | |
925c2ba1 | 5168 | |
5169 | -- Initialize this field to Null_Address if we are not building | |
5170 | -- static dispatch tables static or if the size function is not | |
5171 | -- available. In the former case we cannot initialize this field | |
5172 | -- until the function is frozen and registered in the dispatch | |
5173 | -- table (see Register_Primitive). | |
5174 | ||
5175 | if not Building_Static_DT (Typ) or else not Has_DT (Typ) then | |
cc60bd16 | 5176 | Append_To (TSD_Aggr_List, |
5177 | Unchecked_Convert_To (RTE (RE_Size_Ptr), | |
83c6c069 | 5178 | New_Occurrence_Of (RTE (RE_Null_Address), Loc))); |
cc60bd16 | 5179 | |
5180 | else | |
5181 | declare | |
5182 | Prim_Elmt : Elmt_Id; | |
5183 | Prim : Entity_Id; | |
fa6a6949 | 5184 | Size_Comp : Node_Id; |
cc60bd16 | 5185 | |
5186 | begin | |
5187 | Prim_Elmt := First_Elmt (Primitive_Operations (Typ)); | |
5188 | while Present (Prim_Elmt) loop | |
5189 | Prim := Node (Prim_Elmt); | |
5190 | ||
5191 | if Chars (Prim) = Name_uSize then | |
fc2907f6 | 5192 | Prim := Ultimate_Alias (Prim); |
cc60bd16 | 5193 | |
5194 | if Is_Abstract_Subprogram (Prim) then | |
fa6a6949 | 5195 | Size_Comp := |
cc60bd16 | 5196 | Unchecked_Convert_To (RTE (RE_Size_Ptr), |
83c6c069 | 5197 | New_Occurrence_Of (RTE (RE_Null_Address), Loc)); |
cc60bd16 | 5198 | else |
fa6a6949 | 5199 | Size_Comp := |
cc60bd16 | 5200 | Unchecked_Convert_To (RTE (RE_Size_Ptr), |
5201 | Make_Attribute_Reference (Loc, | |
02a2406d | 5202 | Prefix => New_Occurrence_Of (Prim, Loc), |
fa6a6949 | 5203 | Attribute_Name => Name_Unrestricted_Access)); |
cc60bd16 | 5204 | end if; |
5205 | ||
5206 | exit; | |
5207 | end if; | |
5208 | ||
5209 | Next_Elmt (Prim_Elmt); | |
5210 | end loop; | |
fa6a6949 | 5211 | |
5212 | pragma Assert (Present (Size_Comp)); | |
5213 | Append_To (TSD_Aggr_List, Size_Comp); | |
cc60bd16 | 5214 | end; |
5215 | end if; | |
5216 | end if; | |
5217 | ||
725a69d2 | 5218 | -- Interfaces_Table (required for AI-405) |
5219 | ||
5220 | if RTE_Record_Component_Available (RE_Interfaces_Table) then | |
5221 | ||
5222 | -- Count the number of interface types implemented by Typ | |
5223 | ||
a652dd51 | 5224 | Collect_Interfaces (Typ, Typ_Ifaces); |
725a69d2 | 5225 | |
5226 | AI := First_Elmt (Typ_Ifaces); | |
5227 | while Present (AI) loop | |
5228 | Num_Ifaces := Num_Ifaces + 1; | |
5229 | Next_Elmt (AI); | |
5230 | end loop; | |
952af0b9 | 5231 | |
343d35dc | 5232 | if Num_Ifaces = 0 then |
725a69d2 | 5233 | Iface_Table_Node := Make_Null (Loc); |
952af0b9 | 5234 | |
725a69d2 | 5235 | -- Generate the Interface_Table object |
343d35dc | 5236 | |
5237 | else | |
725a69d2 | 5238 | declare |
17e14451 | 5239 | TSD_Ifaces_List : constant List_Id := New_List; |
cdb1c38f | 5240 | Elmt : Elmt_Id; |
5241 | Sec_DT_Tag : Node_Id; | |
725a69d2 | 5242 | |
5243 | begin | |
5244 | AI := First_Elmt (Typ_Ifaces); | |
5245 | while Present (AI) loop | |
cb4af01d | 5246 | if Is_Ancestor (Node (AI), Typ, Use_Full_View => True) then |
cdb1c38f | 5247 | Sec_DT_Tag := |
83c6c069 | 5248 | New_Occurrence_Of (DT_Ptr, Loc); |
cdb1c38f | 5249 | else |
acf97c11 | 5250 | Elmt := |
5251 | Next_Elmt | |
5252 | (Next_Elmt (First_Elmt (Access_Disp_Table (Typ)))); | |
cdb1c38f | 5253 | pragma Assert (Has_Thunks (Node (Elmt))); |
5254 | ||
d00681a7 | 5255 | while Is_Tag (Node (Elmt)) |
cdb1c38f | 5256 | and then not |
cb4af01d | 5257 | Is_Ancestor (Node (AI), Related_Type (Node (Elmt)), |
5258 | Use_Full_View => True) | |
cdb1c38f | 5259 | loop |
5260 | pragma Assert (Has_Thunks (Node (Elmt))); | |
5261 | Next_Elmt (Elmt); | |
acf97c11 | 5262 | pragma Assert (Has_Thunks (Node (Elmt))); |
5263 | Next_Elmt (Elmt); | |
5264 | pragma Assert (not Has_Thunks (Node (Elmt))); | |
5265 | Next_Elmt (Elmt); | |
cdb1c38f | 5266 | pragma Assert (not Has_Thunks (Node (Elmt))); |
5267 | Next_Elmt (Elmt); | |
5268 | end loop; | |
5269 | ||
5270 | pragma Assert (Ekind (Node (Elmt)) = E_Constant | |
acf97c11 | 5271 | and then not |
5272 | Has_Thunks (Node (Next_Elmt (Next_Elmt (Elmt))))); | |
cdb1c38f | 5273 | Sec_DT_Tag := |
83c6c069 | 5274 | New_Occurrence_Of (Node (Next_Elmt (Next_Elmt (Elmt))), |
acf97c11 | 5275 | Loc); |
cdb1c38f | 5276 | end if; |
5277 | ||
17e14451 | 5278 | Append_To (TSD_Ifaces_List, |
5279 | Make_Aggregate (Loc, | |
5280 | Expressions => New_List ( | |
5281 | ||
5282 | -- Iface_Tag | |
5283 | ||
24971415 | 5284 | Unchecked_Convert_To (RTE (RE_Tag), |
83c6c069 | 5285 | New_Occurrence_Of |
725a69d2 | 5286 | (Node (First_Elmt (Access_Disp_Table (Node (AI)))), |
17e14451 | 5287 | Loc)), |
725a69d2 | 5288 | |
17e14451 | 5289 | -- Static_Offset_To_Top |
725a69d2 | 5290 | |
83c6c069 | 5291 | New_Occurrence_Of (Standard_True, Loc), |
725a69d2 | 5292 | |
17e14451 | 5293 | -- Offset_To_Top_Value |
5294 | ||
5295 | Make_Integer_Literal (Loc, 0), | |
5296 | ||
5297 | -- Offset_To_Top_Func | |
5298 | ||
cdb1c38f | 5299 | Make_Null (Loc), |
5300 | ||
5301 | -- Secondary_DT | |
5302 | ||
5303 | Unchecked_Convert_To (RTE (RE_Tag), Sec_DT_Tag) | |
5304 | ||
5305 | ))); | |
725a69d2 | 5306 | |
725a69d2 | 5307 | Next_Elmt (AI); |
5308 | end loop; | |
725a69d2 | 5309 | |
17e14451 | 5310 | Name_ITable := New_External_Name (Tname, 'I'); |
5311 | ITable := Make_Defining_Identifier (Loc, Name_ITable); | |
2ea346ac | 5312 | Set_Is_Statically_Allocated (ITable, |
5313 | Is_Library_Level_Tagged_Type (Typ)); | |
725a69d2 | 5314 | |
17e14451 | 5315 | -- The table of interfaces is not constant; its slots are |
0c826ed4 | 5316 | -- filled at run time by the IP routine using attribute |
17e14451 | 5317 | -- 'Position to know the location of the tag components |
5318 | -- (and this attribute cannot be safely used before the | |
5319 | -- object is initialized). | |
725a69d2 | 5320 | |
17e14451 | 5321 | Append_To (Result, |
5322 | Make_Object_Declaration (Loc, | |
5323 | Defining_Identifier => ITable, | |
5324 | Aliased_Present => True, | |
5325 | Constant_Present => False, | |
5326 | Object_Definition => | |
5327 | Make_Subtype_Indication (Loc, | |
5328 | Subtype_Mark => | |
83c6c069 | 5329 | New_Occurrence_Of (RTE (RE_Interface_Data), Loc), |
02a2406d | 5330 | Constraint => |
5331 | Make_Index_Or_Discriminant_Constraint (Loc, | |
5332 | Constraints => New_List ( | |
5333 | Make_Integer_Literal (Loc, Num_Ifaces)))), | |
725a69d2 | 5334 | |
02a2406d | 5335 | Expression => Make_Aggregate (Loc, |
17e14451 | 5336 | Expressions => New_List ( |
5337 | Make_Integer_Literal (Loc, Num_Ifaces), | |
02a2406d | 5338 | Make_Aggregate (Loc, TSD_Ifaces_List))))); |
725a69d2 | 5339 | |
17e14451 | 5340 | Append_To (Result, |
5341 | Make_Attribute_Definition_Clause (Loc, | |
83c6c069 | 5342 | Name => New_Occurrence_Of (ITable, Loc), |
17e14451 | 5343 | Chars => Name_Alignment, |
5344 | Expression => | |
5345 | Make_Attribute_Reference (Loc, | |
02a2406d | 5346 | Prefix => |
83c6c069 | 5347 | New_Occurrence_Of (RTE (RE_Integer_Address), Loc), |
17e14451 | 5348 | Attribute_Name => Name_Alignment))); |
725a69d2 | 5349 | |
17e14451 | 5350 | Iface_Table_Node := |
5351 | Make_Attribute_Reference (Loc, | |
83c6c069 | 5352 | Prefix => New_Occurrence_Of (ITable, Loc), |
17e14451 | 5353 | Attribute_Name => Name_Unchecked_Access); |
5354 | end; | |
725a69d2 | 5355 | end if; |
5356 | ||
17e14451 | 5357 | Append_To (TSD_Aggr_List, Iface_Table_Node); |
725a69d2 | 5358 | end if; |
5359 | ||
5360 | -- Generate the Select Specific Data table for synchronized types that | |
5361 | -- implement synchronized interfaces. The size of the table is | |
5362 | -- constrained by the number of non-predefined primitive operations. | |
5363 | ||
5364 | if RTE_Record_Component_Available (RE_SSD) then | |
de54c5ab | 5365 | if Ada_Version >= Ada_2005 |
24971415 | 5366 | and then Has_DT (Typ) |
725a69d2 | 5367 | and then Is_Concurrent_Record_Type (Typ) |
a652dd51 | 5368 | and then Has_Interfaces (Typ) |
725a69d2 | 5369 | and then Nb_Prim > 0 |
5370 | and then not Is_Abstract_Type (Typ) | |
5371 | and then not Is_Controlled (Typ) | |
5372 | and then not Restriction_Active (No_Dispatching_Calls) | |
f38c8084 | 5373 | and then not Restriction_Active (No_Select_Statements) |
725a69d2 | 5374 | then |
343d35dc | 5375 | Append_To (Result, |
5376 | Make_Object_Declaration (Loc, | |
725a69d2 | 5377 | Defining_Identifier => SSD, |
343d35dc | 5378 | Aliased_Present => True, |
5379 | Object_Definition => | |
5380 | Make_Subtype_Indication (Loc, | |
83c6c069 | 5381 | Subtype_Mark => New_Occurrence_Of ( |
725a69d2 | 5382 | RTE (RE_Select_Specific_Data), Loc), |
5383 | Constraint => | |
5384 | Make_Index_Or_Discriminant_Constraint (Loc, | |
5385 | Constraints => New_List ( | |
5386 | Make_Integer_Literal (Loc, Nb_Prim)))))); | |
5387 | ||
17e14451 | 5388 | Append_To (Result, |
5389 | Make_Attribute_Definition_Clause (Loc, | |
83c6c069 | 5390 | Name => New_Occurrence_Of (SSD, Loc), |
17e14451 | 5391 | Chars => Name_Alignment, |
5392 | Expression => | |
5393 | Make_Attribute_Reference (Loc, | |
02a2406d | 5394 | Prefix => |
83c6c069 | 5395 | New_Occurrence_Of (RTE (RE_Integer_Address), Loc), |
17e14451 | 5396 | Attribute_Name => Name_Alignment))); |
5397 | ||
725a69d2 | 5398 | -- This table is initialized by Make_Select_Specific_Data_Table, |
5399 | -- which calls Set_Entry_Index and Set_Prim_Op_Kind. | |
5400 | ||
5401 | Append_To (TSD_Aggr_List, | |
17e14451 | 5402 | Make_Attribute_Reference (Loc, |
02a2406d | 5403 | Prefix => New_Occurrence_Of (SSD, Loc), |
17e14451 | 5404 | Attribute_Name => Name_Unchecked_Access)); |
725a69d2 | 5405 | else |
17e14451 | 5406 | Append_To (TSD_Aggr_List, Make_Null (Loc)); |
343d35dc | 5407 | end if; |
952af0b9 | 5408 | end if; |
5409 | ||
725a69d2 | 5410 | -- Initialize the table of ancestor tags. In case of interface types |
5411 | -- this table is not needed. | |
d62940bf | 5412 | |
cc60bd16 | 5413 | TSD_Tags_List := New_List; |
952af0b9 | 5414 | |
cc60bd16 | 5415 | -- If we are not statically allocating the dispatch table then we must |
5416 | -- fill position 0 with null because we still have not generated the | |
5417 | -- tag of Typ. | |
343d35dc | 5418 | |
cc60bd16 | 5419 | if not Building_Static_DT (Typ) |
5420 | or else Is_Interface (Typ) | |
5421 | then | |
5422 | Append_To (TSD_Tags_List, | |
5423 | Unchecked_Convert_To (RTE (RE_Tag), | |
83c6c069 | 5424 | New_Occurrence_Of (RTE (RE_Null_Address), Loc))); |
343d35dc | 5425 | |
cc60bd16 | 5426 | -- Otherwise we can safely reference the tag |
343d35dc | 5427 | |
cc60bd16 | 5428 | else |
5429 | Append_To (TSD_Tags_List, | |
83c6c069 | 5430 | New_Occurrence_Of (DT_Ptr, Loc)); |
cc60bd16 | 5431 | end if; |
343d35dc | 5432 | |
cc60bd16 | 5433 | -- Fill the rest of the table with the tags of the ancestors |
343d35dc | 5434 | |
cc60bd16 | 5435 | declare |
5436 | Current_Typ : Entity_Id; | |
5437 | Parent_Typ : Entity_Id; | |
5438 | Pos : Nat; | |
725a69d2 | 5439 | |
cc60bd16 | 5440 | begin |
17e14451 | 5441 | Pos := 1; |
5442 | Current_Typ := Typ; | |
725a69d2 | 5443 | |
17e14451 | 5444 | loop |
5445 | Parent_Typ := Etype (Current_Typ); | |
343d35dc | 5446 | |
17e14451 | 5447 | if Is_Private_Type (Parent_Typ) then |
5448 | Parent_Typ := Full_View (Base_Type (Parent_Typ)); | |
5449 | end if; | |
5450 | ||
5451 | exit when Parent_Typ = Current_Typ; | |
5452 | ||
7ac0f4a5 | 5453 | if Is_CPP_Class (Parent_Typ) then |
5454 | ||
17e14451 | 5455 | -- The tags defined in the C++ side will be inherited when |
5456 | -- the object is constructed (Exp_Ch3.Build_Init_Procedure) | |
5457 | ||
5458 | Append_To (TSD_Tags_List, | |
5459 | Unchecked_Convert_To (RTE (RE_Tag), | |
83c6c069 | 5460 | New_Occurrence_Of (RTE (RE_Null_Address), Loc))); |
17e14451 | 5461 | else |
5462 | Append_To (TSD_Tags_List, | |
83c6c069 | 5463 | New_Occurrence_Of |
17e14451 | 5464 | (Node (First_Elmt (Access_Disp_Table (Parent_Typ))), |
5465 | Loc)); | |
5466 | end if; | |
5467 | ||
5468 | Pos := Pos + 1; | |
5469 | Current_Typ := Parent_Typ; | |
5470 | end loop; | |
5471 | ||
5472 | pragma Assert (Pos = I_Depth + 1); | |
5473 | end; | |
5474 | ||
5475 | Append_To (TSD_Aggr_List, | |
5476 | Make_Aggregate (Loc, | |
5477 | Expressions => TSD_Tags_List)); | |
343d35dc | 5478 | |
725a69d2 | 5479 | -- Build the TSD object |
343d35dc | 5480 | |
5481 | Append_To (Result, | |
5482 | Make_Object_Declaration (Loc, | |
5483 | Defining_Identifier => TSD, | |
5484 | Aliased_Present => True, | |
24971415 | 5485 | Constant_Present => Building_Static_DT (Typ), |
343d35dc | 5486 | Object_Definition => |
5487 | Make_Subtype_Indication (Loc, | |
83c6c069 | 5488 | Subtype_Mark => New_Occurrence_Of ( |
343d35dc | 5489 | RTE (RE_Type_Specific_Data), Loc), |
5490 | Constraint => | |
5491 | Make_Index_Or_Discriminant_Constraint (Loc, | |
5492 | Constraints => New_List ( | |
5493 | Make_Integer_Literal (Loc, I_Depth)))), | |
725a69d2 | 5494 | |
343d35dc | 5495 | Expression => Make_Aggregate (Loc, |
17e14451 | 5496 | Expressions => TSD_Aggr_List))); |
343d35dc | 5497 | |
24971415 | 5498 | Set_Is_True_Constant (TSD, Building_Static_DT (Typ)); |
5499 | ||
343d35dc | 5500 | Append_To (Result, |
5501 | Make_Attribute_Definition_Clause (Loc, | |
83c6c069 | 5502 | Name => New_Occurrence_Of (TSD, Loc), |
343d35dc | 5503 | Chars => Name_Alignment, |
5504 | Expression => | |
5505 | Make_Attribute_Reference (Loc, | |
02a2406d | 5506 | Prefix => |
5507 | New_Occurrence_Of (RTE (RE_Integer_Address), Loc), | |
343d35dc | 5508 | Attribute_Name => Name_Alignment))); |
5509 | ||
24971415 | 5510 | -- Initialize or declare the dispatch table object |
343d35dc | 5511 | |
24971415 | 5512 | if not Has_DT (Typ) then |
725a69d2 | 5513 | DT_Constr_List := New_List; |
5514 | DT_Aggr_List := New_List; | |
343d35dc | 5515 | |
725a69d2 | 5516 | -- Typeinfo |
952af0b9 | 5517 | |
725a69d2 | 5518 | New_Node := |
5519 | Make_Attribute_Reference (Loc, | |
02a2406d | 5520 | Prefix => New_Occurrence_Of (TSD, Loc), |
725a69d2 | 5521 | Attribute_Name => Name_Address); |
5522 | ||
5523 | Append_To (DT_Constr_List, New_Node); | |
5524 | Append_To (DT_Aggr_List, New_Copy (New_Node)); | |
5525 | Append_To (DT_Aggr_List, Make_Integer_Literal (Loc, 0)); | |
5526 | ||
5527 | -- In case of locally defined tagged types we have already declared | |
5528 | -- and uninitialized object for the dispatch table, which is now | |
24971415 | 5529 | -- initialized by means of the following assignment: |
5530 | ||
5531 | -- DT := (TSD'Address, 0); | |
725a69d2 | 5532 | |
24971415 | 5533 | if not Building_Static_DT (Typ) then |
725a69d2 | 5534 | Append_To (Result, |
5535 | Make_Assignment_Statement (Loc, | |
02a2406d | 5536 | Name => New_Occurrence_Of (DT, Loc), |
5537 | Expression => Make_Aggregate (Loc, DT_Aggr_List))); | |
725a69d2 | 5538 | |
24971415 | 5539 | -- In case of library level tagged types we declare and export now |
5540 | -- the constant object containing the dummy dispatch table. There | |
5541 | -- is no need to declare the tag here because it has been previously | |
5542 | -- declared by Make_Tags | |
5543 | ||
5544 | -- DT : aliased constant No_Dispatch_Table := | |
5545 | -- (NDT_TSD => TSD'Address; | |
5546 | -- NDT_Prims_Ptr => 0); | |
5547 | -- for DT'Alignment use Address'Alignment; | |
725a69d2 | 5548 | |
5549 | else | |
5550 | Append_To (Result, | |
5551 | Make_Object_Declaration (Loc, | |
5552 | Defining_Identifier => DT, | |
5553 | Aliased_Present => True, | |
17e14451 | 5554 | Constant_Present => True, |
725a69d2 | 5555 | Object_Definition => |
83c6c069 | 5556 | New_Occurrence_Of (RTE (RE_No_Dispatch_Table_Wrapper), Loc), |
02a2406d | 5557 | Expression => Make_Aggregate (Loc, DT_Aggr_List))); |
725a69d2 | 5558 | |
17e14451 | 5559 | Append_To (Result, |
5560 | Make_Attribute_Definition_Clause (Loc, | |
83c6c069 | 5561 | Name => New_Occurrence_Of (DT, Loc), |
17e14451 | 5562 | Chars => Name_Alignment, |
5563 | Expression => | |
5564 | Make_Attribute_Reference (Loc, | |
02a2406d | 5565 | Prefix => |
83c6c069 | 5566 | New_Occurrence_Of (RTE (RE_Integer_Address), Loc), |
17e14451 | 5567 | Attribute_Name => Name_Alignment))); |
5568 | ||
24971415 | 5569 | Export_DT (Typ, DT); |
725a69d2 | 5570 | end if; |
5571 | ||
5572 | -- Common case: Typ has a dispatch table | |
5573 | ||
5574 | -- Generate: | |
5575 | ||
5576 | -- Predef_Prims : Address_Array (1 .. Default_Prim_Ops_Count) := | |
5577 | -- (predef-prim-op-1'address, | |
5578 | -- predef-prim-op-2'address, | |
5579 | -- ... | |
5580 | -- predef-prim-op-n'address); | |
5581 | -- for Predef_Prims'Alignment use Address'Alignment | |
5582 | ||
5583 | -- DT : Dispatch_Table (Nb_Prims) := | |
5584 | -- (Signature => <sig-value>, | |
5585 | -- Tag_Kind => <tag_kind-value>, | |
5586 | -- Predef_Prims => Predef_Prims'First'Address, | |
5587 | -- Offset_To_Top => 0, | |
5588 | -- TSD => TSD'Address; | |
5589 | -- Prims_Ptr => (prim-op-1'address, | |
5590 | -- prim-op-2'address, | |
5591 | -- ... | |
5592 | -- prim-op-n'address)); | |
17e14451 | 5593 | -- for DT'Alignment use Address'Alignment |
725a69d2 | 5594 | |
5595 | else | |
5596 | declare | |
5597 | Pos : Nat; | |
5598 | ||
5599 | begin | |
24971415 | 5600 | if not Building_Static_DT (Typ) then |
725a69d2 | 5601 | Nb_Predef_Prims := Max_Predef_Prims; |
5602 | ||
5603 | else | |
5604 | Prim_Elmt := First_Elmt (Primitive_Operations (Typ)); | |
5605 | while Present (Prim_Elmt) loop | |
5606 | Prim := Node (Prim_Elmt); | |
5607 | ||
5608 | if Is_Predefined_Dispatching_Operation (Prim) | |
5609 | and then not Is_Abstract_Subprogram (Prim) | |
5610 | then | |
5611 | Pos := UI_To_Int (DT_Position (Prim)); | |
5612 | ||
5613 | if Pos > Nb_Predef_Prims then | |
5614 | Nb_Predef_Prims := Pos; | |
5615 | end if; | |
5616 | end if; | |
5617 | ||
5618 | Next_Elmt (Prim_Elmt); | |
5619 | end loop; | |
5620 | end if; | |
5621 | ||
5622 | declare | |
5623 | Prim_Table : array | |
5624 | (Nat range 1 .. Nb_Predef_Prims) of Entity_Id; | |
cc60bd16 | 5625 | Decl : Node_Id; |
725a69d2 | 5626 | E : Entity_Id; |
5627 | ||
5628 | begin | |
5629 | Prim_Ops_Aggr_List := New_List; | |
5630 | ||
5631 | Prim_Table := (others => Empty); | |
17e14451 | 5632 | |
cdb1c38f | 5633 | if Building_Static_DT (Typ) then |
5634 | Prim_Elmt := First_Elmt (Primitive_Operations (Typ)); | |
5635 | while Present (Prim_Elmt) loop | |
5636 | Prim := Node (Prim_Elmt); | |
725a69d2 | 5637 | |
cdb1c38f | 5638 | if Is_Predefined_Dispatching_Operation (Prim) |
5639 | and then not Is_Abstract_Subprogram (Prim) | |
3f8cf2d2 | 5640 | and then not Is_Eliminated (Prim) |
cdb1c38f | 5641 | and then not Present (Prim_Table |
5642 | (UI_To_Int (DT_Position (Prim)))) | |
5643 | then | |
fc2907f6 | 5644 | E := Ultimate_Alias (Prim); |
cdb1c38f | 5645 | pragma Assert (not Is_Abstract_Subprogram (E)); |
5646 | Prim_Table (UI_To_Int (DT_Position (Prim))) := E; | |
5647 | end if; | |
725a69d2 | 5648 | |
cdb1c38f | 5649 | Next_Elmt (Prim_Elmt); |
5650 | end loop; | |
5651 | end if; | |
725a69d2 | 5652 | |
5653 | for J in Prim_Table'Range loop | |
5654 | if Present (Prim_Table (J)) then | |
5655 | New_Node := | |
cc60bd16 | 5656 | Unchecked_Convert_To (RTE (RE_Prim_Ptr), |
acf97c11 | 5657 | Make_Attribute_Reference (Loc, |
02a2406d | 5658 | Prefix => |
5659 | New_Occurrence_Of (Prim_Table (J), Loc), | |
acf97c11 | 5660 | Attribute_Name => Name_Unrestricted_Access)); |
725a69d2 | 5661 | else |
cc60bd16 | 5662 | New_Node := Make_Null (Loc); |
725a69d2 | 5663 | end if; |
5664 | ||
5665 | Append_To (Prim_Ops_Aggr_List, New_Node); | |
5666 | end loop; | |
343d35dc | 5667 | |
cc60bd16 | 5668 | New_Node := |
5669 | Make_Aggregate (Loc, | |
5670 | Expressions => Prim_Ops_Aggr_List); | |
5671 | ||
5672 | Decl := | |
5673 | Make_Subtype_Declaration (Loc, | |
ec97ce79 | 5674 | Defining_Identifier => Make_Temporary (Loc, 'S'), |
5675 | Subtype_Indication => | |
83c6c069 | 5676 | New_Occurrence_Of (RTE (RE_Address_Array), Loc)); |
cc60bd16 | 5677 | |
5678 | Append_To (Result, Decl); | |
5679 | ||
68f95949 | 5680 | Append_To (Result, |
5681 | Make_Object_Declaration (Loc, | |
725a69d2 | 5682 | Defining_Identifier => Predef_Prims, |
68f95949 | 5683 | Aliased_Present => True, |
24971415 | 5684 | Constant_Present => Building_Static_DT (Typ), |
02a2406d | 5685 | Object_Definition => |
5686 | New_Occurrence_Of (Defining_Identifier (Decl), Loc), | |
cc60bd16 | 5687 | Expression => New_Node)); |
5688 | ||
5689 | -- Remember aggregates initializing dispatch tables | |
5690 | ||
5691 | Append_Elmt (New_Node, DT_Aggr); | |
725a69d2 | 5692 | |
5693 | Append_To (Result, | |
5694 | Make_Attribute_Definition_Clause (Loc, | |
83c6c069 | 5695 | Name => New_Occurrence_Of (Predef_Prims, Loc), |
725a69d2 | 5696 | Chars => Name_Alignment, |
5697 | Expression => | |
5698 | Make_Attribute_Reference (Loc, | |
02a2406d | 5699 | Prefix => |
83c6c069 | 5700 | New_Occurrence_Of (RTE (RE_Integer_Address), Loc), |
725a69d2 | 5701 | Attribute_Name => Name_Alignment))); |
5702 | end; | |
5703 | end; | |
5704 | ||
5705 | -- Stage 1: Initialize the discriminant and the record components | |
5706 | ||
5707 | DT_Constr_List := New_List; | |
5708 | DT_Aggr_List := New_List; | |
5709 | ||
5710 | -- Num_Prims. If the tagged type has no primitives we add a dummy | |
5711 | -- slot whose address will be the tag of this type. | |
5712 | ||
5713 | if Nb_Prim = 0 then | |
5714 | New_Node := Make_Integer_Literal (Loc, 1); | |
5715 | else | |
5716 | New_Node := Make_Integer_Literal (Loc, Nb_Prim); | |
5717 | end if; | |
5718 | ||
5719 | Append_To (DT_Constr_List, New_Node); | |
5720 | Append_To (DT_Aggr_List, New_Copy (New_Node)); | |
5721 | ||
5722 | -- Signature | |
5723 | ||
5724 | if RTE_Record_Component_Available (RE_Signature) then | |
5725 | Append_To (DT_Aggr_List, | |
83c6c069 | 5726 | New_Occurrence_Of (RTE (RE_Primary_DT), Loc)); |
725a69d2 | 5727 | end if; |
5728 | ||
5729 | -- Tag_Kind | |
5730 | ||
5731 | if RTE_Record_Component_Available (RE_Tag_Kind) then | |
5732 | Append_To (DT_Aggr_List, Tagged_Kind (Typ)); | |
5733 | end if; | |
5734 | ||
5735 | -- Predef_Prims | |
5736 | ||
5737 | Append_To (DT_Aggr_List, | |
5738 | Make_Attribute_Reference (Loc, | |
02a2406d | 5739 | Prefix => New_Occurrence_Of (Predef_Prims, Loc), |
725a69d2 | 5740 | Attribute_Name => Name_Address)); |
5741 | ||
5742 | -- Offset_To_Top | |
5743 | ||
cc60bd16 | 5744 | Append_To (DT_Aggr_List, Make_Integer_Literal (Loc, 0)); |
725a69d2 | 5745 | |
5746 | -- Typeinfo | |
5747 | ||
5748 | Append_To (DT_Aggr_List, | |
5749 | Make_Attribute_Reference (Loc, | |
02a2406d | 5750 | Prefix => New_Occurrence_Of (TSD, Loc), |
725a69d2 | 5751 | Attribute_Name => Name_Address)); |
5752 | ||
f117057b | 5753 | -- Stage 2: Initialize the table of user-defined primitive operations |
725a69d2 | 5754 | |
5755 | Prim_Ops_Aggr_List := New_List; | |
5756 | ||
5757 | if Nb_Prim = 0 then | |
cc60bd16 | 5758 | Append_To (Prim_Ops_Aggr_List, Make_Null (Loc)); |
725a69d2 | 5759 | |
9a479e51 | 5760 | elsif not Building_Static_DT (Typ) then |
725a69d2 | 5761 | for J in 1 .. Nb_Prim loop |
cc60bd16 | 5762 | Append_To (Prim_Ops_Aggr_List, Make_Null (Loc)); |
725a69d2 | 5763 | end loop; |
5764 | ||
5765 | else | |
5766 | declare | |
d00681a7 | 5767 | CPP_Nb_Prims : constant Nat := CPP_Num_Prims (Typ); |
5768 | E : Entity_Id; | |
5769 | Prim : Entity_Id; | |
5770 | Prim_Elmt : Elmt_Id; | |
5771 | Prim_Pos : Nat; | |
5772 | Prim_Table : array (Nat range 1 .. Nb_Prim) of Entity_Id; | |
725a69d2 | 5773 | |
5774 | begin | |
5775 | Prim_Table := (others => Empty); | |
cdb1c38f | 5776 | |
5777 | Prim_Elmt := First_Elmt (Primitive_Operations (Typ)); | |
725a69d2 | 5778 | while Present (Prim_Elmt) loop |
5779 | Prim := Node (Prim_Elmt); | |
5780 | ||
9429b6e9 | 5781 | -- Retrieve the ultimate alias of the primitive for proper |
5782 | -- handling of renamings and eliminated primitives. | |
5783 | ||
d00681a7 | 5784 | E := Ultimate_Alias (Prim); |
5785 | Prim_Pos := UI_To_Int (DT_Position (E)); | |
9429b6e9 | 5786 | |
3f8cf2d2 | 5787 | -- Do not reference predefined primitives because they are |
5788 | -- located in a separate dispatch table; skip entities with | |
5789 | -- attribute Interface_Alias because they are only required | |
d00681a7 | 5790 | -- to build secondary dispatch tables; skip abstract and |
5791 | -- eliminated primitives; for derivations of CPP types skip | |
5792 | -- primitives located in the C++ part of the dispatch table | |
5793 | -- because their slot is initialized by the IC routine. | |
725a69d2 | 5794 | |
3f8cf2d2 | 5795 | if not Is_Predefined_Dispatching_Operation (Prim) |
5796 | and then not Is_Predefined_Dispatching_Operation (E) | |
5797 | and then not Present (Interface_Alias (Prim)) | |
5798 | and then not Is_Abstract_Subprogram (E) | |
3f8cf2d2 | 5799 | and then not Is_Eliminated (E) |
d00681a7 | 5800 | and then (not Is_CPP_Class (Root_Type (Typ)) |
5801 | or else Prim_Pos > CPP_Nb_Prims) | |
3f8cf2d2 | 5802 | then |
5803 | pragma Assert | |
5804 | (UI_To_Int (DT_Position (Prim)) <= Nb_Prim); | |
5805 | ||
5806 | Prim_Table (UI_To_Int (DT_Position (Prim))) := E; | |
725a69d2 | 5807 | end if; |
5808 | ||
5809 | Next_Elmt (Prim_Elmt); | |
5810 | end loop; | |
5811 | ||
5812 | for J in Prim_Table'Range loop | |
5813 | if Present (Prim_Table (J)) then | |
5814 | New_Node := | |
cc60bd16 | 5815 | Unchecked_Convert_To (RTE (RE_Prim_Ptr), |
acf97c11 | 5816 | Make_Attribute_Reference (Loc, |
02a2406d | 5817 | Prefix => |
5818 | New_Occurrence_Of (Prim_Table (J), Loc), | |
acf97c11 | 5819 | Attribute_Name => Name_Unrestricted_Access)); |
725a69d2 | 5820 | else |
cc60bd16 | 5821 | New_Node := Make_Null (Loc); |
725a69d2 | 5822 | end if; |
5823 | ||
5824 | Append_To (Prim_Ops_Aggr_List, New_Node); | |
5825 | end loop; | |
5826 | end; | |
5827 | end if; | |
5828 | ||
cc60bd16 | 5829 | New_Node := |
725a69d2 | 5830 | Make_Aggregate (Loc, |
cc60bd16 | 5831 | Expressions => Prim_Ops_Aggr_List); |
5832 | ||
5833 | Append_To (DT_Aggr_List, New_Node); | |
5834 | ||
5835 | -- Remember aggregates initializing dispatch tables | |
5836 | ||
5837 | Append_Elmt (New_Node, DT_Aggr); | |
725a69d2 | 5838 | |
5839 | -- In case of locally defined tagged types we have already declared | |
5840 | -- and uninitialized object for the dispatch table, which is now | |
5841 | -- initialized by means of an assignment. | |
5842 | ||
24971415 | 5843 | if not Building_Static_DT (Typ) then |
725a69d2 | 5844 | Append_To (Result, |
5845 | Make_Assignment_Statement (Loc, | |
02a2406d | 5846 | Name => New_Occurrence_Of (DT, Loc), |
5847 | Expression => Make_Aggregate (Loc, DT_Aggr_List))); | |
725a69d2 | 5848 | |
24971415 | 5849 | -- In case of library level tagged types we declare now and export |
5850 | -- the constant object containing the dispatch table. | |
725a69d2 | 5851 | |
5852 | else | |
5853 | Append_To (Result, | |
5854 | Make_Object_Declaration (Loc, | |
5855 | Defining_Identifier => DT, | |
5856 | Aliased_Present => True, | |
17e14451 | 5857 | Constant_Present => True, |
725a69d2 | 5858 | Object_Definition => |
5859 | Make_Subtype_Indication (Loc, | |
83c6c069 | 5860 | Subtype_Mark => New_Occurrence_Of |
725a69d2 | 5861 | (RTE (RE_Dispatch_Table_Wrapper), Loc), |
5862 | Constraint => Make_Index_Or_Discriminant_Constraint (Loc, | |
5863 | Constraints => DT_Constr_List)), | |
02a2406d | 5864 | Expression => Make_Aggregate (Loc, DT_Aggr_List))); |
725a69d2 | 5865 | |
5866 | Append_To (Result, | |
5867 | Make_Attribute_Definition_Clause (Loc, | |
83c6c069 | 5868 | Name => New_Occurrence_Of (DT, Loc), |
725a69d2 | 5869 | Chars => Name_Alignment, |
5870 | Expression => | |
5871 | Make_Attribute_Reference (Loc, | |
02a2406d | 5872 | Prefix => |
83c6c069 | 5873 | New_Occurrence_Of (RTE (RE_Integer_Address), Loc), |
725a69d2 | 5874 | Attribute_Name => Name_Alignment))); |
5875 | ||
24971415 | 5876 | Export_DT (Typ, DT); |
952af0b9 | 5877 | end if; |
76a1c25b | 5878 | end if; |
d62940bf | 5879 | |
f301a57b | 5880 | -- Initialize the table of ancestor tags if not building static |
5881 | -- dispatch table | |
725a69d2 | 5882 | |
24971415 | 5883 | if not Building_Static_DT (Typ) |
17e14451 | 5884 | and then not Is_Interface (Typ) |
725a69d2 | 5885 | and then not Is_CPP_Class (Typ) |
5886 | then | |
5887 | Append_To (Result, | |
5888 | Make_Assignment_Statement (Loc, | |
02a2406d | 5889 | Name => |
725a69d2 | 5890 | Make_Indexed_Component (Loc, |
02a2406d | 5891 | Prefix => |
725a69d2 | 5892 | Make_Selected_Component (Loc, |
02a2406d | 5893 | Prefix => New_Occurrence_Of (TSD, Loc), |
725a69d2 | 5894 | Selector_Name => |
83c6c069 | 5895 | New_Occurrence_Of |
725a69d2 | 5896 | (RTE_Record_Component (RE_Tags_Table), Loc)), |
5897 | Expressions => | |
5898 | New_List (Make_Integer_Literal (Loc, 0))), | |
5899 | ||
5900 | Expression => | |
83c6c069 | 5901 | New_Occurrence_Of |
725a69d2 | 5902 | (Node (First_Elmt (Access_Disp_Table (Typ))), Loc))); |
5903 | end if; | |
5904 | ||
f301a57b | 5905 | -- Inherit the dispatch tables of the parent. There is no need to |
5906 | -- inherit anything from the parent when building static dispatch tables | |
5907 | -- because the whole dispatch table (including inherited primitives) has | |
5908 | -- been already built. | |
acf97c11 | 5909 | |
9a479e51 | 5910 | if Building_Static_DT (Typ) then |
725a69d2 | 5911 | null; |
5912 | ||
af647dc7 | 5913 | -- If the ancestor is a CPP_Class type we inherit the dispatch tables |
5914 | -- in the init proc, and we don't need to fill them in here. | |
d62940bf | 5915 | |
cc60bd16 | 5916 | elsif Is_CPP_Class (Parent_Typ) then |
af647dc7 | 5917 | null; |
d62940bf | 5918 | |
acf97c11 | 5919 | -- Otherwise we fill in the dispatch tables here |
d62940bf | 5920 | |
af647dc7 | 5921 | else |
cc60bd16 | 5922 | if Typ /= Parent_Typ |
af647dc7 | 5923 | and then not Is_Interface (Typ) |
5924 | and then not Restriction_Active (No_Dispatching_Calls) | |
68f95949 | 5925 | then |
343d35dc | 5926 | -- Inherit the dispatch table |
d62940bf | 5927 | |
acf97c11 | 5928 | if not Is_Interface (Typ) |
cc60bd16 | 5929 | and then not Is_Interface (Parent_Typ) |
5930 | and then not Is_CPP_Class (Parent_Typ) | |
acf97c11 | 5931 | then |
5932 | declare | |
5933 | Nb_Prims : constant Int := | |
5934 | UI_To_Int (DT_Entry_Count | |
cc60bd16 | 5935 | (First_Tag_Component (Parent_Typ))); |
5936 | ||
acf97c11 | 5937 | begin |
5938 | Append_To (Elab_Code, | |
5939 | Build_Inherit_Predefined_Prims (Loc, | |
5940 | Old_Tag_Node => | |
83c6c069 | 5941 | New_Occurrence_Of |
acf97c11 | 5942 | (Node |
02a2406d | 5943 | (Next_Elmt |
5944 | (First_Elmt | |
5945 | (Access_Disp_Table (Parent_Typ)))), Loc), | |
acf97c11 | 5946 | New_Tag_Node => |
83c6c069 | 5947 | New_Occurrence_Of |
acf97c11 | 5948 | (Node |
02a2406d | 5949 | (Next_Elmt |
5950 | (First_Elmt | |
5951 | (Access_Disp_Table (Typ)))), Loc))); | |
acf97c11 | 5952 | |
5953 | if Nb_Prims /= 0 then | |
725a69d2 | 5954 | Append_To (Elab_Code, |
acf97c11 | 5955 | Build_Inherit_Prims (Loc, |
5956 | Typ => Typ, | |
5957 | Old_Tag_Node => | |
83c6c069 | 5958 | New_Occurrence_Of |
acf97c11 | 5959 | (Node |
02a2406d | 5960 | (First_Elmt |
5961 | (Access_Disp_Table (Parent_Typ))), Loc), | |
83c6c069 | 5962 | New_Tag_Node => New_Occurrence_Of (DT_Ptr, Loc), |
acf97c11 | 5963 | Num_Prims => Nb_Prims)); |
5964 | end if; | |
5965 | end; | |
af647dc7 | 5966 | end if; |
d62940bf | 5967 | |
af647dc7 | 5968 | -- Inherit the secondary dispatch tables of the ancestor |
d62940bf | 5969 | |
cc60bd16 | 5970 | if not Is_CPP_Class (Parent_Typ) then |
af647dc7 | 5971 | declare |
5972 | Sec_DT_Ancestor : Elmt_Id := | |
5973 | Next_Elmt | |
02a2406d | 5974 | (Next_Elmt |
5975 | (First_Elmt | |
5976 | (Access_Disp_Table | |
5977 | (Parent_Typ)))); | |
af647dc7 | 5978 | Sec_DT_Typ : Elmt_Id := |
5979 | Next_Elmt | |
02a2406d | 5980 | (Next_Elmt |
5981 | (First_Elmt | |
5982 | (Access_Disp_Table (Typ)))); | |
af647dc7 | 5983 | |
5984 | procedure Copy_Secondary_DTs (Typ : Entity_Id); | |
5985 | -- Local procedure required to climb through the ancestors | |
5986 | -- and copy the contents of all their secondary dispatch | |
5987 | -- tables. | |
5988 | ||
5989 | ------------------------ | |
5990 | -- Copy_Secondary_DTs -- | |
5991 | ------------------------ | |
5992 | ||
5993 | procedure Copy_Secondary_DTs (Typ : Entity_Id) is | |
5994 | E : Entity_Id; | |
5995 | Iface : Elmt_Id; | |
5996 | ||
5997 | begin | |
5998 | -- Climb to the ancestor (if any) handling private types | |
5999 | ||
6000 | if Present (Full_View (Etype (Typ))) then | |
6001 | if Full_View (Etype (Typ)) /= Typ then | |
6002 | Copy_Secondary_DTs (Full_View (Etype (Typ))); | |
6003 | end if; | |
d62940bf | 6004 | |
af647dc7 | 6005 | elsif Etype (Typ) /= Typ then |
6006 | Copy_Secondary_DTs (Etype (Typ)); | |
6007 | end if; | |
d62940bf | 6008 | |
a652dd51 | 6009 | if Present (Interfaces (Typ)) |
6010 | and then not Is_Empty_Elmt_List (Interfaces (Typ)) | |
af647dc7 | 6011 | then |
a652dd51 | 6012 | Iface := First_Elmt (Interfaces (Typ)); |
af647dc7 | 6013 | E := First_Entity (Typ); |
6014 | while Present (E) | |
6015 | and then Present (Node (Sec_DT_Ancestor)) | |
725a69d2 | 6016 | and then Ekind (Node (Sec_DT_Ancestor)) = E_Constant |
af647dc7 | 6017 | loop |
6018 | if Is_Tag (E) and then Chars (E) /= Name_uTag then | |
cdb1c38f | 6019 | declare |
6020 | Num_Prims : constant Int := | |
6021 | UI_To_Int (DT_Entry_Count (E)); | |
6022 | ||
6023 | begin | |
6024 | if not Is_Interface (Etype (Typ)) then | |
6025 | ||
6026 | -- Inherit first secondary dispatch table | |
6027 | ||
6028 | Append_To (Elab_Code, | |
6029 | Build_Inherit_Predefined_Prims (Loc, | |
6030 | Old_Tag_Node => | |
6031 | Unchecked_Convert_To (RTE (RE_Tag), | |
83c6c069 | 6032 | New_Occurrence_Of |
acf97c11 | 6033 | (Node |
6034 | (Next_Elmt (Sec_DT_Ancestor)), | |
6035 | Loc)), | |
cdb1c38f | 6036 | New_Tag_Node => |
6037 | Unchecked_Convert_To (RTE (RE_Tag), | |
83c6c069 | 6038 | New_Occurrence_Of |
acf97c11 | 6039 | (Node (Next_Elmt (Sec_DT_Typ)), |
6040 | Loc)))); | |
cdb1c38f | 6041 | |
6042 | if Num_Prims /= 0 then | |
6043 | Append_To (Elab_Code, | |
6044 | Build_Inherit_Prims (Loc, | |
6045 | Typ => Node (Iface), | |
6046 | Old_Tag_Node => | |
6047 | Unchecked_Convert_To | |
6048 | (RTE (RE_Tag), | |
83c6c069 | 6049 | New_Occurrence_Of |
cdb1c38f | 6050 | (Node (Sec_DT_Ancestor), |
6051 | Loc)), | |
6052 | New_Tag_Node => | |
6053 | Unchecked_Convert_To | |
6054 | (RTE (RE_Tag), | |
83c6c069 | 6055 | New_Occurrence_Of |
cdb1c38f | 6056 | (Node (Sec_DT_Typ), Loc)), |
6057 | Num_Prims => Num_Prims)); | |
6058 | end if; | |
6059 | end if; | |
6060 | ||
6061 | Next_Elmt (Sec_DT_Ancestor); | |
6062 | Next_Elmt (Sec_DT_Typ); | |
343d35dc | 6063 | |
acf97c11 | 6064 | -- Skip the secondary dispatch table of |
6065 | -- predefined primitives | |
6066 | ||
6067 | Next_Elmt (Sec_DT_Ancestor); | |
6068 | Next_Elmt (Sec_DT_Typ); | |
6069 | ||
cdb1c38f | 6070 | if not Is_Interface (Etype (Typ)) then |
6071 | ||
6072 | -- Inherit second secondary dispatch table | |
343d35dc | 6073 | |
343d35dc | 6074 | Append_To (Elab_Code, |
6075 | Build_Inherit_Predefined_Prims (Loc, | |
6076 | Old_Tag_Node => | |
6077 | Unchecked_Convert_To (RTE (RE_Tag), | |
83c6c069 | 6078 | New_Occurrence_Of |
acf97c11 | 6079 | (Node |
6080 | (Next_Elmt (Sec_DT_Ancestor)), | |
6081 | Loc)), | |
343d35dc | 6082 | New_Tag_Node => |
6083 | Unchecked_Convert_To (RTE (RE_Tag), | |
83c6c069 | 6084 | New_Occurrence_Of |
acf97c11 | 6085 | (Node (Next_Elmt (Sec_DT_Typ)), |
6086 | Loc)))); | |
343d35dc | 6087 | |
6088 | if Num_Prims /= 0 then | |
6089 | Append_To (Elab_Code, | |
6090 | Build_Inherit_Prims (Loc, | |
17e14451 | 6091 | Typ => Node (Iface), |
343d35dc | 6092 | Old_Tag_Node => |
6093 | Unchecked_Convert_To | |
6094 | (RTE (RE_Tag), | |
83c6c069 | 6095 | New_Occurrence_Of |
343d35dc | 6096 | (Node (Sec_DT_Ancestor), |
6097 | Loc)), | |
6098 | New_Tag_Node => | |
6099 | Unchecked_Convert_To | |
6100 | (RTE (RE_Tag), | |
83c6c069 | 6101 | New_Occurrence_Of |
343d35dc | 6102 | (Node (Sec_DT_Typ), Loc)), |
17e14451 | 6103 | Num_Prims => Num_Prims)); |
343d35dc | 6104 | end if; |
cdb1c38f | 6105 | end if; |
6106 | end; | |
af647dc7 | 6107 | |
6108 | Next_Elmt (Sec_DT_Ancestor); | |
6109 | Next_Elmt (Sec_DT_Typ); | |
acf97c11 | 6110 | |
6111 | -- Skip the secondary dispatch table of | |
6112 | -- predefined primitives | |
6113 | ||
6114 | Next_Elmt (Sec_DT_Ancestor); | |
6115 | Next_Elmt (Sec_DT_Typ); | |
6116 | ||
af647dc7 | 6117 | Next_Elmt (Iface); |
6118 | end if; | |
d62940bf | 6119 | |
af647dc7 | 6120 | Next_Entity (E); |
6121 | end loop; | |
6122 | end if; | |
6123 | end Copy_Secondary_DTs; | |
d62940bf | 6124 | |
af647dc7 | 6125 | begin |
725a69d2 | 6126 | if Present (Node (Sec_DT_Ancestor)) |
6127 | and then Ekind (Node (Sec_DT_Ancestor)) = E_Constant | |
6128 | then | |
af647dc7 | 6129 | -- Handle private types |
76a1c25b | 6130 | |
af647dc7 | 6131 | if Present (Full_View (Typ)) then |
6132 | Copy_Secondary_DTs (Full_View (Typ)); | |
6133 | else | |
6134 | Copy_Secondary_DTs (Typ); | |
6135 | end if; | |
76a1c25b | 6136 | end if; |
af647dc7 | 6137 | end; |
6138 | end if; | |
76a1c25b | 6139 | end if; |
343d35dc | 6140 | end if; |
d62940bf | 6141 | |
15a67a0a | 6142 | -- Generate code to check if the external tag of this type is the same |
6143 | -- as the external tag of some other declaration. | |
354540f3 | 6144 | |
6145 | -- Check_TSD (TSD'Unrestricted_Access); | |
6146 | ||
4a473cb9 | 6147 | -- This check is a consequence of AI05-0113-1/06, so it officially |
6148 | -- applies to Ada 2005 (and Ada 2012). It might be argued that it is | |
6149 | -- a desirable check to add in Ada 95 mode, but we hesitate to make | |
6150 | -- this change, as it would be incompatible, and could conceivably | |
6151 | -- cause a problem in existing Aa 95 code. | |
6152 | ||
6153 | -- We check for No_Run_Time_Mode here, because we do not want to pick | |
6154 | -- up the RE_Check_TSD entity and call it in No_Run_Time mode. | |
52b9debb | 6155 | |
354540f3 | 6156 | if not No_Run_Time_Mode |
4a473cb9 | 6157 | and then Ada_Version >= Ada_2005 |
354540f3 | 6158 | and then RTE_Available (RE_Check_TSD) |
fa771c05 | 6159 | and then not Duplicated_Tag_Checks_Suppressed (Typ) |
354540f3 | 6160 | then |
6161 | Append_To (Elab_Code, | |
6162 | Make_Procedure_Call_Statement (Loc, | |
15a67a0a | 6163 | Name => |
6164 | New_Occurrence_Of (RTE (RE_Check_TSD), Loc), | |
354540f3 | 6165 | Parameter_Associations => New_List ( |
6166 | Make_Attribute_Reference (Loc, | |
15a67a0a | 6167 | Prefix => New_Occurrence_Of (TSD, Loc), |
354540f3 | 6168 | Attribute_Name => Name_Unchecked_Access)))); |
6169 | end if; | |
6170 | ||
343d35dc | 6171 | -- Generate code to register the Tag in the External_Tag hash table for |
6172 | -- the pure Ada type only. | |
d62940bf | 6173 | |
343d35dc | 6174 | -- Register_Tag (Dt_Ptr); |
d62940bf | 6175 | |
725a69d2 | 6176 | -- Skip this action in the following cases: |
6177 | -- 1) if Register_Tag is not available. | |
6178 | -- 2) in No_Run_Time mode. | |
2ea346ac | 6179 | -- 3) if Typ is not defined at the library level (this is required |
725a69d2 | 6180 | -- to avoid adding concurrency control to the hash table used |
6181 | -- by the run-time to register the tags). | |
d62940bf | 6182 | |
cdb1c38f | 6183 | if not No_Run_Time_Mode |
6184 | and then Is_Library_Level_Entity (Typ) | |
6185 | and then RTE_Available (RE_Register_Tag) | |
6186 | then | |
725a69d2 | 6187 | Append_To (Elab_Code, |
cdb1c38f | 6188 | Make_Procedure_Call_Statement (Loc, |
02a2406d | 6189 | Name => |
6190 | New_Occurrence_Of (RTE (RE_Register_Tag), Loc), | |
cdb1c38f | 6191 | Parameter_Associations => |
83c6c069 | 6192 | New_List (New_Occurrence_Of (DT_Ptr, Loc)))); |
d62940bf | 6193 | end if; |
6194 | ||
2ea346ac | 6195 | if not Is_Empty_List (Elab_Code) then |
6196 | Append_List_To (Result, Elab_Code); | |
6197 | end if; | |
cdb1c38f | 6198 | |
f38c8084 | 6199 | -- Populate the two auxiliary tables used for dispatching asynchronous, |
6200 | -- conditional and timed selects for synchronized types that implement | |
6201 | -- a limited interface. Skip this step in Ravenscar profile or when | |
6202 | -- general dispatching is forbidden. | |
17e14451 | 6203 | |
de54c5ab | 6204 | if Ada_Version >= Ada_2005 |
17e14451 | 6205 | and then Is_Concurrent_Record_Type (Typ) |
a652dd51 | 6206 | and then Has_Interfaces (Typ) |
f38c8084 | 6207 | and then not Restriction_Active (No_Dispatching_Calls) |
6208 | and then not Restriction_Active (No_Select_Statements) | |
17e14451 | 6209 | then |
6210 | Append_List_To (Result, | |
6211 | Make_Select_Specific_Data_Table (Typ)); | |
6212 | end if; | |
6213 | ||
cc60bd16 | 6214 | -- Remember entities containing dispatch tables |
acf97c11 | 6215 | |
cc60bd16 | 6216 | Append_Elmt (Predef_Prims, DT_Decl); |
6217 | Append_Elmt (DT, DT_Decl); | |
acf97c11 | 6218 | |
725a69d2 | 6219 | Analyze_List (Result, Suppress => All_Checks); |
17e14451 | 6220 | Set_Has_Dispatch_Table (Typ); |
6221 | ||
f301a57b | 6222 | -- Mark entities containing dispatch tables. Required by the backend to |
6223 | -- handle them properly. | |
cc60bd16 | 6224 | |
925c2ba1 | 6225 | if Has_DT (Typ) then |
cc60bd16 | 6226 | declare |
6227 | Elmt : Elmt_Id; | |
6228 | ||
6229 | begin | |
cc60bd16 | 6230 | -- Object declarations |
6231 | ||
6232 | Elmt := First_Elmt (DT_Decl); | |
6233 | while Present (Elmt) loop | |
6234 | Set_Is_Dispatch_Table_Entity (Node (Elmt)); | |
6235 | pragma Assert (Ekind (Etype (Node (Elmt))) = E_Array_Subtype | |
6236 | or else Ekind (Etype (Node (Elmt))) = E_Record_Subtype); | |
6237 | Set_Is_Dispatch_Table_Entity (Etype (Node (Elmt))); | |
6238 | Next_Elmt (Elmt); | |
6239 | end loop; | |
6240 | ||
6241 | -- Aggregates initializing dispatch tables | |
6242 | ||
6243 | Elmt := First_Elmt (DT_Aggr); | |
6244 | while Present (Elmt) loop | |
6245 | Set_Is_Dispatch_Table_Entity (Etype (Node (Elmt))); | |
6246 | Next_Elmt (Elmt); | |
6247 | end loop; | |
6248 | end; | |
6249 | end if; | |
6250 | ||
e00e091c | 6251 | -- Register the tagged type in the call graph nodes table |
6252 | ||
6253 | Register_CG_Node (Typ); | |
6254 | ||
360b005f | 6255 | Restore_Globals; |
76a1c25b | 6256 | return Result; |
6257 | end Make_DT; | |
d62940bf | 6258 | |
87d6f1a4 | 6259 | ----------------- |
6260 | -- Make_VM_TSD -- | |
6261 | ----------------- | |
6262 | ||
6263 | function Make_VM_TSD (Typ : Entity_Id) return List_Id is | |
6cb4b973 | 6264 | Loc : constant Source_Ptr := Sloc (Typ); |
6265 | Result : constant List_Id := New_List; | |
6266 | ||
6267 | function Count_Primitives (Typ : Entity_Id) return Nat; | |
6268 | -- Count the non-predefined primitive operations of Typ | |
6269 | ||
6270 | ---------------------- | |
6271 | -- Count_Primitives -- | |
6272 | ---------------------- | |
6273 | ||
6274 | function Count_Primitives (Typ : Entity_Id) return Nat is | |
6275 | Nb_Prim : Nat; | |
6276 | Prim_Elmt : Elmt_Id; | |
6277 | Prim : Entity_Id; | |
6278 | ||
6279 | begin | |
6280 | Nb_Prim := 0; | |
6281 | ||
6282 | Prim_Elmt := First_Elmt (Primitive_Operations (Typ)); | |
6283 | while Present (Prim_Elmt) loop | |
6284 | Prim := Node (Prim_Elmt); | |
6285 | ||
6286 | if Is_Predefined_Dispatching_Operation (Prim) | |
6287 | or else Is_Predefined_Dispatching_Alias (Prim) | |
6288 | then | |
6289 | null; | |
6290 | ||
6291 | elsif Present (Interface_Alias (Prim)) then | |
6292 | null; | |
6293 | ||
6294 | else | |
6295 | Nb_Prim := Nb_Prim + 1; | |
6296 | end if; | |
6297 | ||
6298 | Next_Elmt (Prim_Elmt); | |
6299 | end loop; | |
6300 | ||
6301 | return Nb_Prim; | |
6302 | end Count_Primitives; | |
6303 | ||
6304 | -------------- | |
6305 | -- Make_OSD -- | |
6306 | -------------- | |
6307 | ||
6308 | function Make_OSD (Iface : Entity_Id) return Node_Id; | |
6309 | -- Generate the Object Specific Data table required to dispatch calls | |
6310 | -- through synchronized interfaces. Returns a node that references the | |
6311 | -- generated OSD object. | |
6312 | ||
6313 | function Make_OSD (Iface : Entity_Id) return Node_Id is | |
6314 | Nb_Prim : constant Nat := Count_Primitives (Iface); | |
6315 | OSD : Entity_Id; | |
6316 | OSD_Aggr_List : List_Id; | |
6317 | ||
6318 | begin | |
6319 | -- Generate | |
6320 | -- OSD : Ada.Tags.Object_Specific_Data (Nb_Prims) := | |
6321 | -- (OSD_Table => (1 => <value>, | |
6322 | -- ... | |
6323 | -- N => <value>)); | |
6324 | ||
6325 | if Nb_Prim = 0 | |
6326 | or else Is_Abstract_Type (Typ) | |
6327 | or else Is_Controlled (Typ) | |
6328 | or else Restriction_Active (No_Dispatching_Calls) | |
6329 | or else not Is_Limited_Type (Typ) | |
6330 | or else not Has_Interfaces (Typ) | |
6331 | or else not RTE_Record_Component_Available (RE_OSD_Table) | |
6332 | then | |
6333 | -- No OSD table required | |
6334 | ||
6335 | return Make_Null (Loc); | |
6336 | ||
6337 | else | |
6338 | OSD_Aggr_List := New_List; | |
6339 | ||
6340 | declare | |
6341 | Prim_Table : array (Nat range 1 .. Nb_Prim) of Entity_Id; | |
6342 | Prim : Entity_Id; | |
6343 | Prim_Alias : Entity_Id; | |
6344 | Prim_Elmt : Elmt_Id; | |
6345 | E : Entity_Id; | |
6346 | Count : Nat := 0; | |
6347 | Pos : Nat; | |
6348 | ||
6349 | begin | |
6350 | Prim_Table := (others => Empty); | |
6351 | Prim_Alias := Empty; | |
6352 | ||
6353 | Prim_Elmt := First_Elmt (Primitive_Operations (Typ)); | |
6354 | while Present (Prim_Elmt) loop | |
6355 | Prim := Node (Prim_Elmt); | |
6356 | ||
6357 | if Present (Interface_Alias (Prim)) | |
6358 | and then Find_Dispatching_Type | |
6359 | (Interface_Alias (Prim)) = Iface | |
6360 | then | |
6361 | Prim_Alias := Interface_Alias (Prim); | |
6362 | E := Ultimate_Alias (Prim); | |
6363 | Pos := UI_To_Int (DT_Position (Prim_Alias)); | |
6364 | ||
6365 | if Present (Prim_Table (Pos)) then | |
6366 | pragma Assert (Prim_Table (Pos) = E); | |
6367 | null; | |
6368 | ||
6369 | else | |
6370 | Prim_Table (Pos) := E; | |
6371 | ||
6372 | Append_To (OSD_Aggr_List, | |
6373 | Make_Component_Association (Loc, | |
02a2406d | 6374 | Choices => New_List ( |
6cb4b973 | 6375 | Make_Integer_Literal (Loc, |
6376 | DT_Position (Prim_Alias))), | |
6377 | Expression => | |
6378 | Make_Integer_Literal (Loc, | |
6379 | DT_Position (Alias (Prim))))); | |
6380 | ||
6381 | Count := Count + 1; | |
6382 | end if; | |
6383 | end if; | |
6384 | ||
6385 | Next_Elmt (Prim_Elmt); | |
6386 | end loop; | |
02a2406d | 6387 | |
6cb4b973 | 6388 | pragma Assert (Count = Nb_Prim); |
6389 | end; | |
6390 | ||
6391 | OSD := Make_Temporary (Loc, 'I'); | |
6392 | ||
6393 | Append_To (Result, | |
6394 | Make_Object_Declaration (Loc, | |
6395 | Defining_Identifier => OSD, | |
6396 | Aliased_Present => True, | |
6397 | Constant_Present => True, | |
6398 | Object_Definition => | |
6399 | Make_Subtype_Indication (Loc, | |
6400 | Subtype_Mark => | |
83c6c069 | 6401 | New_Occurrence_Of (RTE (RE_Object_Specific_Data), Loc), |
02a2406d | 6402 | Constraint => |
6cb4b973 | 6403 | Make_Index_Or_Discriminant_Constraint (Loc, |
6404 | Constraints => New_List ( | |
6405 | Make_Integer_Literal (Loc, Nb_Prim)))), | |
6406 | ||
6407 | Expression => | |
6408 | Make_Aggregate (Loc, | |
6409 | Component_Associations => New_List ( | |
6410 | Make_Component_Association (Loc, | |
02a2406d | 6411 | Choices => New_List ( |
6cb4b973 | 6412 | New_Occurrence_Of |
6413 | (RTE_Record_Component (RE_OSD_Num_Prims), Loc)), | |
6414 | Expression => | |
6415 | Make_Integer_Literal (Loc, Nb_Prim)), | |
6416 | ||
6417 | Make_Component_Association (Loc, | |
02a2406d | 6418 | Choices => New_List ( |
6cb4b973 | 6419 | New_Occurrence_Of |
6420 | (RTE_Record_Component (RE_OSD_Table), Loc)), | |
6421 | Expression => Make_Aggregate (Loc, | |
6422 | Component_Associations => OSD_Aggr_List)))))); | |
6423 | ||
6424 | return | |
6425 | Make_Attribute_Reference (Loc, | |
83c6c069 | 6426 | Prefix => New_Occurrence_Of (OSD, Loc), |
6cb4b973 | 6427 | Attribute_Name => Name_Unchecked_Access); |
6428 | end if; | |
6429 | end Make_OSD; | |
6430 | ||
6431 | -- Local variables | |
6432 | ||
6433 | Nb_Prim : constant Nat := Count_Primitives (Typ); | |
87d6f1a4 | 6434 | AI : Elmt_Id; |
bf7f5966 | 6435 | I_Depth : Nat; |
87d6f1a4 | 6436 | Iface_Table_Node : Node_Id; |
bf7f5966 | 6437 | Num_Ifaces : Nat; |
87d6f1a4 | 6438 | TSD_Aggr_List : List_Id; |
6439 | Typ_Ifaces : Elist_Id; | |
6440 | TSD_Tags_List : List_Id; | |
6441 | ||
6442 | Tname : constant Name_Id := Chars (Typ); | |
bf7f5966 | 6443 | Name_SSD : constant Name_Id := |
6444 | New_External_Name (Tname, 'S', Suffix_Index => -1); | |
87d6f1a4 | 6445 | Name_TSD : constant Name_Id := |
6446 | New_External_Name (Tname, 'B', Suffix_Index => -1); | |
bf7f5966 | 6447 | SSD : constant Entity_Id := |
6448 | Make_Defining_Identifier (Loc, Name_SSD); | |
87d6f1a4 | 6449 | TSD : constant Entity_Id := |
6450 | Make_Defining_Identifier (Loc, Name_TSD); | |
6451 | begin | |
6452 | -- Generate code to create the storage for the type specific data object | |
6453 | -- with enough space to store the tags of the ancestors plus the tags | |
6454 | -- of all the implemented interfaces (as described in a-tags.ads). | |
6455 | ||
6456 | -- TSD : Type_Specific_Data (I_Depth) := | |
6457 | -- (Idepth => I_Depth, | |
6cb4b973 | 6458 | -- Tag_Kind => <tag_kind-value>, |
87d6f1a4 | 6459 | -- Access_Level => Type_Access_Level (Typ), |
d67a83fe | 6460 | -- Alignment => Typ'Alignment, |
87d6f1a4 | 6461 | -- HT_Link => null, |
6462 | -- Type_Is_Abstract => <<boolean-value>>, | |
6463 | -- Type_Is_Library_Level => <<boolean-value>>, | |
6464 | -- Interfaces_Table => <<access-value>> | |
6cb4b973 | 6465 | -- SSD => SSD_Table'Address |
87d6f1a4 | 6466 | -- Tags_Table => (0 => Typ'Tag, |
6467 | -- 1 => Parent'Tag | |
6468 | -- ...)); | |
6469 | ||
6470 | TSD_Aggr_List := New_List; | |
6471 | ||
6472 | -- Idepth: Count ancestors to compute the inheritance depth. For private | |
6473 | -- extensions, always go to the full view in order to compute the real | |
6474 | -- inheritance depth. | |
6475 | ||
6476 | declare | |
6477 | Current_Typ : Entity_Id; | |
6478 | Parent_Typ : Entity_Id; | |
6479 | ||
6480 | begin | |
6481 | I_Depth := 0; | |
6482 | Current_Typ := Typ; | |
6483 | loop | |
6484 | Parent_Typ := Etype (Current_Typ); | |
6485 | ||
6486 | if Is_Private_Type (Parent_Typ) then | |
6487 | Parent_Typ := Full_View (Base_Type (Parent_Typ)); | |
6488 | end if; | |
6489 | ||
6490 | exit when Parent_Typ = Current_Typ; | |
6491 | ||
6492 | I_Depth := I_Depth + 1; | |
6493 | Current_Typ := Parent_Typ; | |
6494 | end loop; | |
6495 | end; | |
6496 | ||
6cb4b973 | 6497 | -- I_Depth |
6498 | ||
87d6f1a4 | 6499 | Append_To (TSD_Aggr_List, |
6500 | Make_Integer_Literal (Loc, I_Depth)); | |
6501 | ||
6cb4b973 | 6502 | -- Tag_Kind |
6503 | ||
6504 | Append_To (TSD_Aggr_List, Tagged_Kind (Typ)); | |
6505 | ||
87d6f1a4 | 6506 | -- Access_Level |
6507 | ||
6508 | Append_To (TSD_Aggr_List, | |
6509 | Make_Integer_Literal (Loc, Type_Access_Level (Typ))); | |
6510 | ||
d67a83fe | 6511 | -- Alignment |
6512 | ||
6fc3e7ad | 6513 | -- For CPP types we cannot rely on the value of 'Alignment provided |
44705307 | 6514 | -- by the backend to initialize this TSD field. Why not??? |
6fc3e7ad | 6515 | |
6516 | if Convention (Typ) = Convention_CPP | |
6517 | or else Is_CPP_Class (Root_Type (Typ)) | |
6518 | then | |
6519 | Append_To (TSD_Aggr_List, | |
6520 | Make_Integer_Literal (Loc, 0)); | |
6521 | else | |
6522 | Append_To (TSD_Aggr_List, | |
6523 | Make_Attribute_Reference (Loc, | |
83c6c069 | 6524 | Prefix => New_Occurrence_Of (Typ, Loc), |
6fc3e7ad | 6525 | Attribute_Name => Name_Alignment)); |
6526 | end if; | |
d67a83fe | 6527 | |
87d6f1a4 | 6528 | -- HT_Link |
6529 | ||
6530 | Append_To (TSD_Aggr_List, | |
6531 | Make_Null (Loc)); | |
6532 | ||
6533 | -- Type_Is_Abstract (Ada 2012: AI05-0173) | |
6534 | ||
6535 | declare | |
6536 | Type_Is_Abstract : Entity_Id; | |
6537 | ||
6538 | begin | |
6539 | Type_Is_Abstract := | |
6540 | Boolean_Literals (Is_Abstract_Type (Typ)); | |
6541 | ||
6542 | Append_To (TSD_Aggr_List, | |
6543 | New_Occurrence_Of (Type_Is_Abstract, Loc)); | |
6544 | end; | |
6545 | ||
6546 | -- Type_Is_Library_Level | |
6547 | ||
6548 | declare | |
6549 | Type_Is_Library_Level : Entity_Id; | |
87d6f1a4 | 6550 | begin |
6551 | Type_Is_Library_Level := | |
6552 | Boolean_Literals (Is_Library_Level_Entity (Typ)); | |
87d6f1a4 | 6553 | Append_To (TSD_Aggr_List, |
6554 | New_Occurrence_Of (Type_Is_Library_Level, Loc)); | |
6555 | end; | |
6556 | ||
6557 | -- Interfaces_Table (required for AI-405) | |
6558 | ||
6559 | if RTE_Record_Component_Available (RE_Interfaces_Table) then | |
6560 | ||
6561 | -- Count the number of interface types implemented by Typ | |
6562 | ||
6563 | Collect_Interfaces (Typ, Typ_Ifaces); | |
6564 | ||
bf7f5966 | 6565 | Num_Ifaces := 0; |
87d6f1a4 | 6566 | AI := First_Elmt (Typ_Ifaces); |
6567 | while Present (AI) loop | |
6568 | Num_Ifaces := Num_Ifaces + 1; | |
6569 | Next_Elmt (AI); | |
6570 | end loop; | |
6571 | ||
6572 | if Num_Ifaces = 0 then | |
6573 | Iface_Table_Node := Make_Null (Loc); | |
6574 | ||
6575 | -- Generate the Interface_Table object | |
6576 | ||
6577 | else | |
6578 | declare | |
6579 | TSD_Ifaces_List : constant List_Id := New_List; | |
6cb4b973 | 6580 | Iface : Entity_Id; |
87d6f1a4 | 6581 | ITable : Node_Id; |
6582 | ||
6583 | begin | |
6584 | AI := First_Elmt (Typ_Ifaces); | |
6585 | while Present (AI) loop | |
6cb4b973 | 6586 | Iface := Node (AI); |
6587 | ||
87d6f1a4 | 6588 | Append_To (TSD_Ifaces_List, |
6589 | Make_Aggregate (Loc, | |
6590 | Expressions => New_List ( | |
6cb4b973 | 6591 | |
4055a532 | 6592 | -- Iface_Tag |
6cb4b973 | 6593 | |
87d6f1a4 | 6594 | Make_Attribute_Reference (Loc, |
83c6c069 | 6595 | Prefix => New_Occurrence_Of (Iface, Loc), |
6cb4b973 | 6596 | Attribute_Name => Name_Tag), |
6597 | ||
4055a532 | 6598 | -- OSD |
6cb4b973 | 6599 | |
6600 | Make_OSD (Iface)))); | |
87d6f1a4 | 6601 | |
6602 | Next_Elmt (AI); | |
6603 | end loop; | |
6604 | ||
6605 | ITable := Make_Temporary (Loc, 'I'); | |
6606 | ||
6607 | Append_To (Result, | |
6608 | Make_Object_Declaration (Loc, | |
6609 | Defining_Identifier => ITable, | |
6610 | Aliased_Present => True, | |
6611 | Constant_Present => True, | |
6612 | Object_Definition => | |
6613 | Make_Subtype_Indication (Loc, | |
6614 | Subtype_Mark => | |
83c6c069 | 6615 | New_Occurrence_Of (RTE (RE_Interface_Data), Loc), |
b860aaec | 6616 | Constraint => Make_Index_Or_Discriminant_Constraint |
87d6f1a4 | 6617 | (Loc, |
6618 | Constraints => New_List ( | |
6619 | Make_Integer_Literal (Loc, Num_Ifaces)))), | |
6620 | ||
6621 | Expression => Make_Aggregate (Loc, | |
6622 | Expressions => New_List ( | |
6623 | Make_Integer_Literal (Loc, Num_Ifaces), | |
6624 | Make_Aggregate (Loc, | |
6625 | Expressions => TSD_Ifaces_List))))); | |
6626 | ||
6627 | Iface_Table_Node := | |
6628 | Make_Attribute_Reference (Loc, | |
83c6c069 | 6629 | Prefix => New_Occurrence_Of (ITable, Loc), |
87d6f1a4 | 6630 | Attribute_Name => Name_Unchecked_Access); |
6631 | end; | |
6632 | end if; | |
6633 | ||
6634 | Append_To (TSD_Aggr_List, Iface_Table_Node); | |
6635 | end if; | |
6636 | ||
bf7f5966 | 6637 | -- Generate the Select Specific Data table for synchronized types that |
6638 | -- implement synchronized interfaces. The size of the table is | |
6639 | -- constrained by the number of non-predefined primitive operations. | |
6640 | ||
bf7f5966 | 6641 | if RTE_Record_Component_Available (RE_SSD) then |
6642 | if Ada_Version >= Ada_2005 | |
6643 | and then Has_DT (Typ) | |
6644 | and then Is_Concurrent_Record_Type (Typ) | |
6645 | and then Has_Interfaces (Typ) | |
6646 | and then Nb_Prim > 0 | |
6647 | and then not Is_Abstract_Type (Typ) | |
6648 | and then not Is_Controlled (Typ) | |
6649 | and then not Restriction_Active (No_Dispatching_Calls) | |
6650 | and then not Restriction_Active (No_Select_Statements) | |
6651 | then | |
6652 | Append_To (Result, | |
6653 | Make_Object_Declaration (Loc, | |
6654 | Defining_Identifier => SSD, | |
6655 | Aliased_Present => True, | |
6656 | Object_Definition => | |
6657 | Make_Subtype_Indication (Loc, | |
83c6c069 | 6658 | Subtype_Mark => New_Occurrence_Of ( |
bf7f5966 | 6659 | RTE (RE_Select_Specific_Data), Loc), |
6660 | Constraint => | |
6661 | Make_Index_Or_Discriminant_Constraint (Loc, | |
6662 | Constraints => New_List ( | |
6663 | Make_Integer_Literal (Loc, Nb_Prim)))))); | |
6664 | ||
6665 | -- This table is initialized by Make_Select_Specific_Data_Table, | |
6666 | -- which calls Set_Entry_Index and Set_Prim_Op_Kind. | |
6667 | ||
6668 | Append_To (TSD_Aggr_List, | |
6669 | Make_Attribute_Reference (Loc, | |
83c6c069 | 6670 | Prefix => New_Occurrence_Of (SSD, Loc), |
bf7f5966 | 6671 | Attribute_Name => Name_Unchecked_Access)); |
6672 | else | |
6673 | Append_To (TSD_Aggr_List, Make_Null (Loc)); | |
6674 | end if; | |
6675 | end if; | |
6676 | ||
87d6f1a4 | 6677 | -- Initialize the table of ancestor tags. In case of interface types |
6678 | -- this table is not needed. | |
6679 | ||
6680 | TSD_Tags_List := New_List; | |
6681 | ||
6682 | -- Fill position 0 with Typ'Tag | |
6683 | ||
6684 | Append_To (TSD_Tags_List, | |
6685 | Make_Attribute_Reference (Loc, | |
83c6c069 | 6686 | Prefix => New_Occurrence_Of (Typ, Loc), |
87d6f1a4 | 6687 | Attribute_Name => Name_Tag)); |
6688 | ||
6689 | -- Fill the rest of the table with the tags of the ancestors | |
6690 | ||
6691 | declare | |
6692 | Current_Typ : Entity_Id; | |
6693 | Parent_Typ : Entity_Id; | |
6694 | Pos : Nat; | |
6695 | ||
6696 | begin | |
6697 | Pos := 1; | |
6698 | Current_Typ := Typ; | |
6699 | ||
6700 | loop | |
6701 | Parent_Typ := Etype (Current_Typ); | |
6702 | ||
6703 | if Is_Private_Type (Parent_Typ) then | |
6704 | Parent_Typ := Full_View (Base_Type (Parent_Typ)); | |
6705 | end if; | |
6706 | ||
6707 | exit when Parent_Typ = Current_Typ; | |
6708 | ||
6709 | Append_To (TSD_Tags_List, | |
6710 | Make_Attribute_Reference (Loc, | |
83c6c069 | 6711 | Prefix => New_Occurrence_Of (Parent_Typ, Loc), |
87d6f1a4 | 6712 | Attribute_Name => Name_Tag)); |
6713 | ||
6714 | Pos := Pos + 1; | |
6715 | Current_Typ := Parent_Typ; | |
6716 | end loop; | |
6717 | ||
6718 | pragma Assert (Pos = I_Depth + 1); | |
6719 | end; | |
6720 | ||
6721 | Append_To (TSD_Aggr_List, | |
6722 | Make_Aggregate (Loc, | |
6723 | Expressions => TSD_Tags_List)); | |
6724 | ||
6725 | -- Build the TSD object | |
6726 | ||
6727 | Append_To (Result, | |
6728 | Make_Object_Declaration (Loc, | |
6729 | Defining_Identifier => TSD, | |
6730 | Aliased_Present => True, | |
6731 | Constant_Present => True, | |
6732 | Object_Definition => | |
6733 | Make_Subtype_Indication (Loc, | |
83c6c069 | 6734 | Subtype_Mark => New_Occurrence_Of ( |
87d6f1a4 | 6735 | RTE (RE_Type_Specific_Data), Loc), |
6736 | Constraint => | |
6737 | Make_Index_Or_Discriminant_Constraint (Loc, | |
6738 | Constraints => New_List ( | |
6739 | Make_Integer_Literal (Loc, I_Depth)))), | |
6740 | ||
6741 | Expression => Make_Aggregate (Loc, | |
6742 | Expressions => TSD_Aggr_List))); | |
6743 | ||
6744 | -- Generate: | |
15a67a0a | 6745 | -- Check_TSD (TSD => TSD'Unrestricted_Access); |
87d6f1a4 | 6746 | |
79500ea0 | 6747 | if Ada_Version >= Ada_2005 |
6748 | and then Is_Library_Level_Entity (Typ) | |
79500ea0 | 6749 | and then RTE_Available (RE_Check_TSD) |
fa771c05 | 6750 | and then not Duplicated_Tag_Checks_Suppressed (Typ) |
79500ea0 | 6751 | then |
6752 | Append_To (Result, | |
6753 | Make_Procedure_Call_Statement (Loc, | |
83c6c069 | 6754 | Name => New_Occurrence_Of (RTE (RE_Check_TSD), Loc), |
79500ea0 | 6755 | Parameter_Associations => New_List ( |
6756 | Make_Attribute_Reference (Loc, | |
83c6c069 | 6757 | Prefix => New_Occurrence_Of (TSD, Loc), |
79500ea0 | 6758 | Attribute_Name => Name_Unrestricted_Access)))); |
6759 | end if; | |
87d6f1a4 | 6760 | |
6761 | -- Generate: | |
6762 | -- Register_TSD (TSD'Unrestricted_Access); | |
6763 | ||
6764 | Append_To (Result, | |
6765 | Make_Procedure_Call_Statement (Loc, | |
83c6c069 | 6766 | Name => New_Occurrence_Of (RTE (RE_Register_TSD), Loc), |
87d6f1a4 | 6767 | Parameter_Associations => New_List ( |
6768 | Make_Attribute_Reference (Loc, | |
83c6c069 | 6769 | Prefix => New_Occurrence_Of (TSD, Loc), |
87d6f1a4 | 6770 | Attribute_Name => Name_Unrestricted_Access)))); |
6771 | ||
bf7f5966 | 6772 | -- Populate the two auxiliary tables used for dispatching asynchronous, |
6773 | -- conditional and timed selects for synchronized types that implement | |
6774 | -- a limited interface. Skip this step in Ravenscar profile or when | |
6775 | -- general dispatching is forbidden. | |
6776 | ||
6777 | if Ada_Version >= Ada_2005 | |
6778 | and then Is_Concurrent_Record_Type (Typ) | |
6779 | and then Has_Interfaces (Typ) | |
6780 | and then not Restriction_Active (No_Dispatching_Calls) | |
6781 | and then not Restriction_Active (No_Select_Statements) | |
6782 | then | |
6783 | Append_List_To (Result, | |
6784 | Make_Select_Specific_Data_Table (Typ)); | |
6785 | end if; | |
6786 | ||
87d6f1a4 | 6787 | return Result; |
6788 | end Make_VM_TSD; | |
6789 | ||
76a1c25b | 6790 | ------------------------------------- |
6791 | -- Make_Select_Specific_Data_Table -- | |
6792 | ------------------------------------- | |
d62940bf | 6793 | |
76a1c25b | 6794 | function Make_Select_Specific_Data_Table |
6795 | (Typ : Entity_Id) return List_Id | |
6796 | is | |
6797 | Assignments : constant List_Id := New_List; | |
6798 | Loc : constant Source_Ptr := Sloc (Typ); | |
d62940bf | 6799 | |
68f95949 | 6800 | Conc_Typ : Entity_Id; |
6801 | Decls : List_Id; | |
68f95949 | 6802 | Prim : Entity_Id; |
6803 | Prim_Als : Entity_Id; | |
6804 | Prim_Elmt : Elmt_Id; | |
6805 | Prim_Pos : Uint; | |
343d35dc | 6806 | Nb_Prim : Nat := 0; |
d62940bf | 6807 | |
76a1c25b | 6808 | type Examined_Array is array (Int range <>) of Boolean; |
d62940bf | 6809 | |
76a1c25b | 6810 | function Find_Entry_Index (E : Entity_Id) return Uint; |
6811 | -- Given an entry, find its index in the visible declarations of the | |
6812 | -- corresponding concurrent type of Typ. | |
d62940bf | 6813 | |
76a1c25b | 6814 | ---------------------- |
6815 | -- Find_Entry_Index -- | |
6816 | ---------------------- | |
d62940bf | 6817 | |
76a1c25b | 6818 | function Find_Entry_Index (E : Entity_Id) return Uint is |
6819 | Index : Uint := Uint_1; | |
6820 | Subp_Decl : Entity_Id; | |
d62940bf | 6821 | |
76a1c25b | 6822 | begin |
6823 | if Present (Decls) | |
6824 | and then not Is_Empty_List (Decls) | |
6825 | then | |
6826 | Subp_Decl := First (Decls); | |
6827 | while Present (Subp_Decl) loop | |
6828 | if Nkind (Subp_Decl) = N_Entry_Declaration then | |
6829 | if Defining_Identifier (Subp_Decl) = E then | |
6830 | return Index; | |
6831 | end if; | |
d62940bf | 6832 | |
76a1c25b | 6833 | Index := Index + 1; |
6834 | end if; | |
d62940bf | 6835 | |
76a1c25b | 6836 | Next (Subp_Decl); |
6837 | end loop; | |
6838 | end if; | |
d62940bf | 6839 | |
76a1c25b | 6840 | return Uint_0; |
6841 | end Find_Entry_Index; | |
6842 | ||
bf7f5966 | 6843 | -- Local variables |
6844 | ||
6845 | Tag_Node : Node_Id; | |
6846 | ||
76a1c25b | 6847 | -- Start of processing for Make_Select_Specific_Data_Table |
6848 | ||
6849 | begin | |
68f95949 | 6850 | pragma Assert (not Restriction_Active (No_Dispatching_Calls)); |
6851 | ||
76a1c25b | 6852 | if Present (Corresponding_Concurrent_Type (Typ)) then |
6853 | Conc_Typ := Corresponding_Concurrent_Type (Typ); | |
6854 | ||
17e14451 | 6855 | if Present (Full_View (Conc_Typ)) then |
6856 | Conc_Typ := Full_View (Conc_Typ); | |
6857 | end if; | |
6858 | ||
76a1c25b | 6859 | if Ekind (Conc_Typ) = E_Protected_Type then |
6860 | Decls := Visible_Declarations (Protected_Definition ( | |
6861 | Parent (Conc_Typ))); | |
d62940bf | 6862 | else |
6863 | pragma Assert (Ekind (Conc_Typ) = E_Task_Type); | |
76a1c25b | 6864 | Decls := Visible_Declarations (Task_Definition ( |
6865 | Parent (Conc_Typ))); | |
6866 | end if; | |
6867 | end if; | |
d62940bf | 6868 | |
76a1c25b | 6869 | -- Count the non-predefined primitive operations |
d62940bf | 6870 | |
76a1c25b | 6871 | Prim_Elmt := First_Elmt (Primitive_Operations (Typ)); |
6872 | while Present (Prim_Elmt) loop | |
af647dc7 | 6873 | Prim := Node (Prim_Elmt); |
6874 | ||
6875 | if not (Is_Predefined_Dispatching_Operation (Prim) | |
6876 | or else Is_Predefined_Dispatching_Alias (Prim)) | |
6877 | then | |
76a1c25b | 6878 | Nb_Prim := Nb_Prim + 1; |
6879 | end if; | |
d62940bf | 6880 | |
76a1c25b | 6881 | Next_Elmt (Prim_Elmt); |
6882 | end loop; | |
d62940bf | 6883 | |
76a1c25b | 6884 | declare |
68f95949 | 6885 | Examined : Examined_Array (1 .. Nb_Prim) := (others => False); |
d62940bf | 6886 | |
76a1c25b | 6887 | begin |
6888 | Prim_Elmt := First_Elmt (Primitive_Operations (Typ)); | |
6889 | while Present (Prim_Elmt) loop | |
6890 | Prim := Node (Prim_Elmt); | |
d62940bf | 6891 | |
af647dc7 | 6892 | -- Look for primitive overriding an abstract interface subprogram |
d62940bf | 6893 | |
a652dd51 | 6894 | if Present (Interface_Alias (Prim)) |
c8da6114 | 6895 | and then not |
6896 | Is_Ancestor | |
cb4af01d | 6897 | (Find_Dispatching_Type (Interface_Alias (Prim)), Typ, |
6898 | Use_Full_View => True) | |
af647dc7 | 6899 | and then not Examined (UI_To_Int (DT_Position (Alias (Prim)))) |
6900 | then | |
6901 | Prim_Pos := DT_Position (Alias (Prim)); | |
6902 | pragma Assert (UI_To_Int (Prim_Pos) <= Nb_Prim); | |
6903 | Examined (UI_To_Int (Prim_Pos)) := True; | |
d62940bf | 6904 | |
af647dc7 | 6905 | -- Set the primitive operation kind regardless of subprogram |
6906 | -- type. Generate: | |
6907 | -- Ada.Tags.Set_Prim_Op_Kind (DT_Ptr, <position>, <kind>); | |
d62940bf | 6908 | |
bf7f5966 | 6909 | if Tagged_Type_Expansion then |
6910 | Tag_Node := | |
83c6c069 | 6911 | New_Occurrence_Of |
bf7f5966 | 6912 | (Node (First_Elmt (Access_Disp_Table (Typ))), Loc); |
6913 | ||
6914 | else | |
6915 | Tag_Node := | |
6916 | Make_Attribute_Reference (Loc, | |
83c6c069 | 6917 | Prefix => New_Occurrence_Of (Typ, Loc), |
bf7f5966 | 6918 | Attribute_Name => Name_Tag); |
6919 | end if; | |
6920 | ||
af647dc7 | 6921 | Append_To (Assignments, |
725a69d2 | 6922 | Make_Procedure_Call_Statement (Loc, |
83c6c069 | 6923 | Name => New_Occurrence_Of (RTE (RE_Set_Prim_Op_Kind), Loc), |
725a69d2 | 6924 | Parameter_Associations => New_List ( |
bf7f5966 | 6925 | Tag_Node, |
725a69d2 | 6926 | Make_Integer_Literal (Loc, Prim_Pos), |
6927 | Prim_Op_Kind (Alias (Prim), Typ)))); | |
68f95949 | 6928 | |
af647dc7 | 6929 | -- Retrieve the root of the alias chain |
68f95949 | 6930 | |
fc2907f6 | 6931 | Prim_Als := Ultimate_Alias (Prim); |
68f95949 | 6932 | |
af647dc7 | 6933 | -- In the case of an entry wrapper, set the entry index |
68f95949 | 6934 | |
af647dc7 | 6935 | if Ekind (Prim) = E_Procedure |
6936 | and then Is_Primitive_Wrapper (Prim_Als) | |
6937 | and then Ekind (Wrapped_Entity (Prim_Als)) = E_Entry | |
6938 | then | |
6939 | -- Generate: | |
6940 | -- Ada.Tags.Set_Entry_Index | |
6941 | -- (DT_Ptr, <position>, <index>); | |
68f95949 | 6942 | |
bf7f5966 | 6943 | if Tagged_Type_Expansion then |
6944 | Tag_Node := | |
83c6c069 | 6945 | New_Occurrence_Of |
96dc081d | 6946 | (Node (First_Elmt (Access_Disp_Table (Typ))), Loc); |
bf7f5966 | 6947 | else |
6948 | Tag_Node := | |
6949 | Make_Attribute_Reference (Loc, | |
83c6c069 | 6950 | Prefix => New_Occurrence_Of (Typ, Loc), |
bf7f5966 | 6951 | Attribute_Name => Name_Tag); |
6952 | end if; | |
6953 | ||
af647dc7 | 6954 | Append_To (Assignments, |
725a69d2 | 6955 | Make_Procedure_Call_Statement (Loc, |
6956 | Name => | |
83c6c069 | 6957 | New_Occurrence_Of (RTE (RE_Set_Entry_Index), Loc), |
725a69d2 | 6958 | Parameter_Associations => New_List ( |
bf7f5966 | 6959 | Tag_Node, |
725a69d2 | 6960 | Make_Integer_Literal (Loc, Prim_Pos), |
6961 | Make_Integer_Literal (Loc, | |
6962 | Find_Entry_Index (Wrapped_Entity (Prim_Als)))))); | |
76a1c25b | 6963 | end if; |
6964 | end if; | |
6965 | ||
76a1c25b | 6966 | Next_Elmt (Prim_Elmt); |
6967 | end loop; | |
6968 | end; | |
6969 | ||
6970 | return Assignments; | |
6971 | end Make_Select_Specific_Data_Table; | |
d62940bf | 6972 | |
17e14451 | 6973 | --------------- |
6974 | -- Make_Tags -- | |
6975 | --------------- | |
6976 | ||
6977 | function Make_Tags (Typ : Entity_Id) return List_Id is | |
f301a57b | 6978 | Loc : constant Source_Ptr := Sloc (Typ); |
6979 | Result : constant List_Id := New_List; | |
6980 | ||
6981 | procedure Import_DT | |
6982 | (Tag_Typ : Entity_Id; | |
6983 | DT : Entity_Id; | |
6984 | Is_Secondary_DT : Boolean); | |
6985 | -- Import the dispatch table DT of tagged type Tag_Typ. Required to | |
6986 | -- generate forward references and statically allocate the table. For | |
6987 | -- primary dispatch tables that require no dispatch table generate: | |
d03ada96 | 6988 | |
f301a57b | 6989 | -- DT : static aliased constant Non_Dispatch_Table_Wrapper; |
d03ada96 | 6990 | -- pragma Import (Ada, DT); |
6991 | ||
f301a57b | 6992 | -- Otherwise generate: |
d03ada96 | 6993 | |
f301a57b | 6994 | -- DT : static aliased constant Dispatch_Table_Wrapper (Nb_Prim); |
d03ada96 | 6995 | -- pragma Import (Ada, DT); |
7854e190 | 6996 | |
f301a57b | 6997 | --------------- |
6998 | -- Import_DT -- | |
6999 | --------------- | |
24971415 | 7000 | |
f301a57b | 7001 | procedure Import_DT |
7002 | (Tag_Typ : Entity_Id; | |
7003 | DT : Entity_Id; | |
7004 | Is_Secondary_DT : Boolean) | |
7005 | is | |
7006 | DT_Constr_List : List_Id; | |
7007 | Nb_Prim : Nat; | |
24971415 | 7008 | |
f301a57b | 7009 | begin |
7010 | Set_Is_Imported (DT); | |
7011 | Set_Ekind (DT, E_Constant); | |
7012 | Set_Related_Type (DT, Typ); | |
24971415 | 7013 | |
24971415 | 7014 | -- The scope must be set now to call Get_External_Name |
7015 | ||
7016 | Set_Scope (DT, Current_Scope); | |
7017 | ||
f92da234 | 7018 | Get_External_Name (DT); |
24971415 | 7019 | Set_Interface_Name (DT, |
d03ada96 | 7020 | Make_String_Literal (Loc, Strval => String_From_Name_Buffer)); |
17e14451 | 7021 | |
24971415 | 7022 | -- Ensure proper Sprint output of this implicit importation |
17e14451 | 7023 | |
24971415 | 7024 | Set_Is_Internal (DT); |
17e14451 | 7025 | |
24971415 | 7026 | -- Save this entity to allow Make_DT to generate its exportation |
7027 | ||
f301a57b | 7028 | Append_Elmt (DT, Dispatch_Table_Wrappers (Typ)); |
24971415 | 7029 | |
f301a57b | 7030 | -- No dispatch table required |
acf97c11 | 7031 | |
d03ada96 | 7032 | if not Is_Secondary_DT and then not Has_DT (Tag_Typ) then |
f301a57b | 7033 | Append_To (Result, |
7034 | Make_Object_Declaration (Loc, | |
7035 | Defining_Identifier => DT, | |
7036 | Aliased_Present => True, | |
7037 | Constant_Present => True, | |
7038 | Object_Definition => | |
83c6c069 | 7039 | New_Occurrence_Of |
7040 | (RTE (RE_No_Dispatch_Table_Wrapper), Loc))); | |
f301a57b | 7041 | |
7042 | else | |
24971415 | 7043 | -- Calculate the number of primitives of the dispatch table and |
7044 | -- the size of the Type_Specific_Data record. | |
7045 | ||
f301a57b | 7046 | Nb_Prim := |
7047 | UI_To_Int (DT_Entry_Count (First_Tag_Component (Tag_Typ))); | |
24971415 | 7048 | |
d03ada96 | 7049 | -- If the tagged type has no primitives we add a dummy slot whose |
7050 | -- address will be the tag of this type. | |
24971415 | 7051 | |
7052 | if Nb_Prim = 0 then | |
7053 | DT_Constr_List := | |
7054 | New_List (Make_Integer_Literal (Loc, 1)); | |
7055 | else | |
7056 | DT_Constr_List := | |
7057 | New_List (Make_Integer_Literal (Loc, Nb_Prim)); | |
7058 | end if; | |
7059 | ||
7060 | Append_To (Result, | |
7061 | Make_Object_Declaration (Loc, | |
7062 | Defining_Identifier => DT, | |
7063 | Aliased_Present => True, | |
7064 | Constant_Present => True, | |
7065 | Object_Definition => | |
7066 | Make_Subtype_Indication (Loc, | |
7067 | Subtype_Mark => | |
83c6c069 | 7068 | New_Occurrence_Of (RTE (RE_Dispatch_Table_Wrapper), Loc), |
24971415 | 7069 | Constraint => Make_Index_Or_Discriminant_Constraint (Loc, |
7070 | Constraints => DT_Constr_List)))); | |
f301a57b | 7071 | end if; |
7072 | end Import_DT; | |
7073 | ||
7074 | -- Local variables | |
7075 | ||
7076 | Tname : constant Name_Id := Chars (Typ); | |
7077 | AI_Tag_Comp : Elmt_Id; | |
7640ed3d | 7078 | DT : Node_Id := Empty; |
f301a57b | 7079 | DT_Ptr : Node_Id; |
7080 | Predef_Prims_Ptr : Node_Id; | |
d04be62f | 7081 | Iface_DT : Node_Id := Empty; |
f301a57b | 7082 | Iface_DT_Ptr : Node_Id; |
d215f619 | 7083 | New_Node : Node_Id; |
f301a57b | 7084 | Suffix_Index : Int; |
7085 | Typ_Name : Name_Id; | |
7086 | Typ_Comps : Elist_Id; | |
7087 | ||
7088 | -- Start of processing for Make_Tags | |
7089 | ||
7090 | begin | |
d00681a7 | 7091 | pragma Assert (No (Access_Disp_Table (Typ))); |
7092 | Set_Access_Disp_Table (Typ, New_Elmt_List); | |
f301a57b | 7093 | |
7094 | -- 1) Generate the primary tag entities | |
7095 | ||
7096 | -- Primary dispatch table containing user-defined primitives | |
7097 | ||
d00681a7 | 7098 | DT_Ptr := Make_Defining_Identifier (Loc, New_External_Name (Tname, 'P')); |
7099 | Set_Etype (DT_Ptr, RTE (RE_Tag)); | |
7100 | Append_Elmt (DT_Ptr, Access_Disp_Table (Typ)); | |
f301a57b | 7101 | |
d00681a7 | 7102 | -- Minimum decoration |
f301a57b | 7103 | |
d00681a7 | 7104 | Set_Ekind (DT_Ptr, E_Variable); |
7105 | Set_Related_Type (DT_Ptr, Typ); | |
f301a57b | 7106 | |
02a2406d | 7107 | -- Notify back end that the types are associated with a dispatch table |
2ff0322d | 7108 | |
7109 | Set_Is_Dispatch_Table_Entity (RTE (RE_Prim_Ptr)); | |
7110 | Set_Is_Dispatch_Table_Entity (RTE (RE_Predef_Prims_Table_Ptr)); | |
7111 | ||
d00681a7 | 7112 | -- For CPP types there is no need to build the dispatch tables since |
5682f43c | 7113 | -- they are imported from the C++ side. If the CPP type has an IP then |
7114 | -- we declare now the variable that will store the copy of the C++ tag. | |
d03ada96 | 7115 | -- If the CPP type is an interface, we need the variable as well because |
7116 | -- it becomes the pointer to the corresponding secondary table. | |
f301a57b | 7117 | |
d00681a7 | 7118 | if Is_CPP_Class (Typ) then |
5682f43c | 7119 | if Has_CPP_Constructors (Typ) or else Is_Interface (Typ) then |
24971415 | 7120 | Append_To (Result, |
7121 | Make_Object_Declaration (Loc, | |
7122 | Defining_Identifier => DT_Ptr, | |
83c6c069 | 7123 | Object_Definition => New_Occurrence_Of (RTE (RE_Tag), Loc), |
24971415 | 7124 | Expression => |
7125 | Unchecked_Convert_To (RTE (RE_Tag), | |
83c6c069 | 7126 | New_Occurrence_Of (RTE (RE_Null_Address), Loc)))); |
24971415 | 7127 | |
d00681a7 | 7128 | Set_Is_Statically_Allocated (DT_Ptr, |
7129 | Is_Library_Level_Tagged_Type (Typ)); | |
7130 | end if; | |
9af28f61 | 7131 | |
d00681a7 | 7132 | -- Ada types |
3dbca0d5 | 7133 | |
d00681a7 | 7134 | else |
7135 | -- Primary dispatch table containing predefined primitives | |
acf97c11 | 7136 | |
d00681a7 | 7137 | Predef_Prims_Ptr := |
7138 | Make_Defining_Identifier (Loc, | |
7139 | Chars => New_External_Name (Tname, 'Y')); | |
7140 | Set_Etype (Predef_Prims_Ptr, RTE (RE_Address)); | |
7141 | Append_Elmt (Predef_Prims_Ptr, Access_Disp_Table (Typ)); | |
24971415 | 7142 | |
d00681a7 | 7143 | -- Import the forward declaration of the Dispatch Table wrapper |
d03ada96 | 7144 | -- record (Make_DT will take care of exporting it). |
24971415 | 7145 | |
d00681a7 | 7146 | if Building_Static_DT (Typ) then |
7147 | Set_Dispatch_Table_Wrappers (Typ, New_Elmt_List); | |
17e14451 | 7148 | |
d00681a7 | 7149 | DT := |
7150 | Make_Defining_Identifier (Loc, | |
7151 | Chars => New_External_Name (Tname, 'T')); | |
7152 | ||
7153 | Import_DT (Typ, DT, Is_Secondary_DT => False); | |
7154 | ||
7155 | if Has_DT (Typ) then | |
7156 | Append_To (Result, | |
7157 | Make_Object_Declaration (Loc, | |
7158 | Defining_Identifier => DT_Ptr, | |
7159 | Constant_Present => True, | |
83c6c069 | 7160 | Object_Definition => |
7161 | New_Occurrence_Of (RTE (RE_Tag), Loc), | |
4055a532 | 7162 | Expression => |
d00681a7 | 7163 | Unchecked_Convert_To (RTE (RE_Tag), |
7164 | Make_Attribute_Reference (Loc, | |
4055a532 | 7165 | Prefix => |
d00681a7 | 7166 | Make_Selected_Component (Loc, |
83c6c069 | 7167 | Prefix => New_Occurrence_Of (DT, Loc), |
4055a532 | 7168 | Selector_Name => |
7169 | New_Occurrence_Of | |
7170 | (RTE_Record_Component (RE_Prims_Ptr), Loc)), | |
d00681a7 | 7171 | Attribute_Name => Name_Address)))); |
7172 | ||
7173 | -- Generate the SCIL node for the previous object declaration | |
7174 | -- because it has a tag initialization. | |
7175 | ||
7176 | if Generate_SCIL then | |
7177 | New_Node := | |
7178 | Make_SCIL_Dispatch_Table_Tag_Init (Sloc (Last (Result))); | |
7179 | Set_SCIL_Entity (New_Node, Typ); | |
7180 | Set_SCIL_Node (Last (Result), New_Node); | |
7181 | end if; | |
7182 | ||
7183 | Append_To (Result, | |
7184 | Make_Object_Declaration (Loc, | |
7185 | Defining_Identifier => Predef_Prims_Ptr, | |
7186 | Constant_Present => True, | |
4055a532 | 7187 | Object_Definition => |
83c6c069 | 7188 | New_Occurrence_Of (RTE (RE_Address), Loc), |
4055a532 | 7189 | Expression => |
d00681a7 | 7190 | Make_Attribute_Reference (Loc, |
4055a532 | 7191 | Prefix => |
d00681a7 | 7192 | Make_Selected_Component (Loc, |
83c6c069 | 7193 | Prefix => New_Occurrence_Of (DT, Loc), |
4055a532 | 7194 | Selector_Name => |
7195 | New_Occurrence_Of | |
7196 | (RTE_Record_Component (RE_Predef_Prims), Loc)), | |
d00681a7 | 7197 | Attribute_Name => Name_Address))); |
7198 | ||
7199 | -- No dispatch table required | |
7200 | ||
7201 | else | |
7202 | Append_To (Result, | |
7203 | Make_Object_Declaration (Loc, | |
7204 | Defining_Identifier => DT_Ptr, | |
7205 | Constant_Present => True, | |
83c6c069 | 7206 | Object_Definition => |
7207 | New_Occurrence_Of (RTE (RE_Tag), Loc), | |
4055a532 | 7208 | Expression => |
d00681a7 | 7209 | Unchecked_Convert_To (RTE (RE_Tag), |
7210 | Make_Attribute_Reference (Loc, | |
4055a532 | 7211 | Prefix => |
d00681a7 | 7212 | Make_Selected_Component (Loc, |
83c6c069 | 7213 | Prefix => New_Occurrence_Of (DT, Loc), |
4055a532 | 7214 | Selector_Name => |
7215 | New_Occurrence_Of | |
7216 | (RTE_Record_Component (RE_NDT_Prims_Ptr), | |
7217 | Loc)), | |
d00681a7 | 7218 | Attribute_Name => Name_Address)))); |
7219 | end if; | |
7220 | ||
7221 | Set_Is_True_Constant (DT_Ptr); | |
7222 | Set_Is_Statically_Allocated (DT_Ptr); | |
7223 | end if; | |
7224 | end if; | |
17e14451 | 7225 | |
7226 | -- 2) Generate the secondary tag entities | |
7227 | ||
d00681a7 | 7228 | -- Collect the components associated with secondary dispatch tables |
7229 | ||
a652dd51 | 7230 | if Has_Interfaces (Typ) then |
d00681a7 | 7231 | Collect_Interface_Components (Typ, Typ_Comps); |
f301a57b | 7232 | |
d03ada96 | 7233 | -- For each interface type we build a unique external name associated |
7234 | -- with its secondary dispatch table. This name is used to declare an | |
7235 | -- object that references this secondary dispatch table, whose value | |
7236 | -- will be used for the elaboration of Typ objects, and also for the | |
7237 | -- elaboration of objects of types derived from Typ that do not | |
7238 | -- override the primitives of this interface type. | |
f301a57b | 7239 | |
7240 | Suffix_Index := 1; | |
17e14451 | 7241 | |
02a2406d | 7242 | -- Note: The value of Suffix_Index must be in sync with the values of |
7243 | -- Suffix_Index in secondary dispatch tables generated by Make_DT. | |
17e14451 | 7244 | |
d00681a7 | 7245 | if Is_CPP_Class (Typ) then |
7246 | AI_Tag_Comp := First_Elmt (Typ_Comps); | |
7247 | while Present (AI_Tag_Comp) loop | |
7248 | Get_Secondary_DT_External_Name | |
7249 | (Typ, Related_Type (Node (AI_Tag_Comp)), Suffix_Index); | |
7250 | Typ_Name := Name_Find; | |
17e14451 | 7251 | |
02a2406d | 7252 | -- Declare variables to store copy of the C++ secondary tags |
f301a57b | 7253 | |
d00681a7 | 7254 | Iface_DT_Ptr := |
7255 | Make_Defining_Identifier (Loc, | |
7256 | Chars => New_External_Name (Typ_Name, 'P')); | |
7257 | Set_Etype (Iface_DT_Ptr, RTE (RE_Interface_Tag)); | |
7258 | Set_Ekind (Iface_DT_Ptr, E_Variable); | |
7259 | Set_Is_Tag (Iface_DT_Ptr); | |
acf97c11 | 7260 | |
d00681a7 | 7261 | Set_Has_Thunks (Iface_DT_Ptr); |
7262 | Set_Related_Type | |
7263 | (Iface_DT_Ptr, Related_Type (Node (AI_Tag_Comp))); | |
7264 | Append_Elmt (Iface_DT_Ptr, Access_Disp_Table (Typ)); | |
cdb1c38f | 7265 | |
f301a57b | 7266 | Append_To (Result, |
7267 | Make_Object_Declaration (Loc, | |
7268 | Defining_Identifier => Iface_DT_Ptr, | |
83c6c069 | 7269 | Object_Definition => New_Occurrence_Of |
f301a57b | 7270 | (RTE (RE_Interface_Tag), Loc), |
7271 | Expression => | |
7272 | Unchecked_Convert_To (RTE (RE_Interface_Tag), | |
83c6c069 | 7273 | New_Occurrence_Of (RTE (RE_Null_Address), Loc)))); |
f301a57b | 7274 | |
d00681a7 | 7275 | Set_Is_Statically_Allocated (Iface_DT_Ptr, |
7276 | Is_Library_Level_Tagged_Type (Typ)); | |
acf97c11 | 7277 | |
d00681a7 | 7278 | Next_Elmt (AI_Tag_Comp); |
7279 | end loop; | |
acf97c11 | 7280 | |
d00681a7 | 7281 | -- This is not a CPP_Class type |
acf97c11 | 7282 | |
d00681a7 | 7283 | else |
7284 | AI_Tag_Comp := First_Elmt (Typ_Comps); | |
7285 | while Present (AI_Tag_Comp) loop | |
7286 | Get_Secondary_DT_External_Name | |
7287 | (Typ, Related_Type (Node (AI_Tag_Comp)), Suffix_Index); | |
7288 | Typ_Name := Name_Find; | |
17e14451 | 7289 | |
d00681a7 | 7290 | if Building_Static_DT (Typ) then |
7291 | Iface_DT := | |
7292 | Make_Defining_Identifier (Loc, | |
7293 | Chars => New_External_Name | |
7294 | (Typ_Name, 'T', Suffix_Index => -1)); | |
7295 | Import_DT | |
7296 | (Tag_Typ => Related_Type (Node (AI_Tag_Comp)), | |
7297 | DT => Iface_DT, | |
7298 | Is_Secondary_DT => True); | |
7299 | end if; | |
acf97c11 | 7300 | |
d00681a7 | 7301 | -- Secondary dispatch table referencing thunks to user-defined |
7302 | -- primitives covered by this interface. | |
acf97c11 | 7303 | |
d00681a7 | 7304 | Iface_DT_Ptr := |
7305 | Make_Defining_Identifier (Loc, | |
7306 | Chars => New_External_Name (Typ_Name, 'P')); | |
7307 | Set_Etype (Iface_DT_Ptr, RTE (RE_Interface_Tag)); | |
7308 | Set_Ekind (Iface_DT_Ptr, E_Constant); | |
7309 | Set_Is_Tag (Iface_DT_Ptr); | |
7310 | Set_Has_Thunks (Iface_DT_Ptr); | |
7311 | Set_Is_Statically_Allocated (Iface_DT_Ptr, | |
7312 | Is_Library_Level_Tagged_Type (Typ)); | |
7313 | Set_Is_True_Constant (Iface_DT_Ptr); | |
7314 | Set_Related_Type | |
7315 | (Iface_DT_Ptr, Related_Type (Node (AI_Tag_Comp))); | |
7316 | Append_Elmt (Iface_DT_Ptr, Access_Disp_Table (Typ)); | |
7317 | ||
7318 | if Building_Static_DT (Typ) then | |
7319 | Append_To (Result, | |
7320 | Make_Object_Declaration (Loc, | |
7321 | Defining_Identifier => Iface_DT_Ptr, | |
7322 | Constant_Present => True, | |
83c6c069 | 7323 | Object_Definition => New_Occurrence_Of |
d00681a7 | 7324 | (RTE (RE_Interface_Tag), Loc), |
4055a532 | 7325 | Expression => |
d00681a7 | 7326 | Unchecked_Convert_To (RTE (RE_Interface_Tag), |
7327 | Make_Attribute_Reference (Loc, | |
4055a532 | 7328 | Prefix => |
d00681a7 | 7329 | Make_Selected_Component (Loc, |
4055a532 | 7330 | Prefix => |
83c6c069 | 7331 | New_Occurrence_Of (Iface_DT, Loc), |
4055a532 | 7332 | Selector_Name => |
7333 | New_Occurrence_Of | |
7334 | (RTE_Record_Component (RE_Prims_Ptr), | |
7335 | Loc)), | |
d00681a7 | 7336 | Attribute_Name => Name_Address)))); |
7337 | end if; | |
7338 | ||
7339 | -- Secondary dispatch table referencing thunks to predefined | |
7340 | -- primitives. | |
7341 | ||
7342 | Iface_DT_Ptr := | |
7343 | Make_Defining_Identifier (Loc, | |
7344 | Chars => New_External_Name (Typ_Name, 'Y')); | |
7345 | Set_Etype (Iface_DT_Ptr, RTE (RE_Address)); | |
7346 | Set_Ekind (Iface_DT_Ptr, E_Constant); | |
7347 | Set_Is_Tag (Iface_DT_Ptr); | |
7348 | Set_Has_Thunks (Iface_DT_Ptr); | |
7349 | Set_Is_Statically_Allocated (Iface_DT_Ptr, | |
7350 | Is_Library_Level_Tagged_Type (Typ)); | |
7351 | Set_Is_True_Constant (Iface_DT_Ptr); | |
7352 | Set_Related_Type | |
7353 | (Iface_DT_Ptr, Related_Type (Node (AI_Tag_Comp))); | |
7354 | Append_Elmt (Iface_DT_Ptr, Access_Disp_Table (Typ)); | |
7355 | ||
7356 | -- Secondary dispatch table referencing user-defined primitives | |
7357 | -- covered by this interface. | |
7358 | ||
7359 | Iface_DT_Ptr := | |
7360 | Make_Defining_Identifier (Loc, | |
7361 | Chars => New_External_Name (Typ_Name, 'D')); | |
7362 | Set_Etype (Iface_DT_Ptr, RTE (RE_Interface_Tag)); | |
7363 | Set_Ekind (Iface_DT_Ptr, E_Constant); | |
7364 | Set_Is_Tag (Iface_DT_Ptr); | |
7365 | Set_Is_Statically_Allocated (Iface_DT_Ptr, | |
7366 | Is_Library_Level_Tagged_Type (Typ)); | |
7367 | Set_Is_True_Constant (Iface_DT_Ptr); | |
7368 | Set_Related_Type | |
7369 | (Iface_DT_Ptr, Related_Type (Node (AI_Tag_Comp))); | |
7370 | Append_Elmt (Iface_DT_Ptr, Access_Disp_Table (Typ)); | |
7371 | ||
7372 | -- Secondary dispatch table referencing predefined primitives | |
7373 | ||
7374 | Iface_DT_Ptr := | |
7375 | Make_Defining_Identifier (Loc, | |
7376 | Chars => New_External_Name (Typ_Name, 'Z')); | |
7377 | Set_Etype (Iface_DT_Ptr, RTE (RE_Address)); | |
7378 | Set_Ekind (Iface_DT_Ptr, E_Constant); | |
7379 | Set_Is_Tag (Iface_DT_Ptr); | |
7380 | Set_Is_Statically_Allocated (Iface_DT_Ptr, | |
7381 | Is_Library_Level_Tagged_Type (Typ)); | |
7382 | Set_Is_True_Constant (Iface_DT_Ptr); | |
7383 | Set_Related_Type | |
7384 | (Iface_DT_Ptr, Related_Type (Node (AI_Tag_Comp))); | |
7385 | Append_Elmt (Iface_DT_Ptr, Access_Disp_Table (Typ)); | |
7386 | ||
7387 | Next_Elmt (AI_Tag_Comp); | |
7388 | end loop; | |
7389 | end if; | |
17e14451 | 7390 | end if; |
7391 | ||
dffd0a90 | 7392 | -- 3) At the end of Access_Disp_Table, if the type has user-defined |
7393 | -- primitives, we add the entity of an access type declaration that | |
7394 | -- is used by Build_Get_Prim_Op_Address to expand dispatching calls | |
7395 | -- through the primary dispatch table. | |
7396 | ||
7397 | if UI_To_Int (DT_Entry_Count (First_Tag_Component (Typ))) = 0 then | |
7398 | Analyze_List (Result); | |
17e14451 | 7399 | |
7400 | -- Generate: | |
cc60bd16 | 7401 | -- type Typ_DT is array (1 .. Nb_Prims) of Prim_Ptr; |
17e14451 | 7402 | -- type Typ_DT_Acc is access Typ_DT; |
7403 | ||
dffd0a90 | 7404 | else |
7405 | declare | |
7406 | Name_DT_Prims : constant Name_Id := | |
7407 | New_External_Name (Tname, 'G'); | |
7408 | Name_DT_Prims_Acc : constant Name_Id := | |
7409 | New_External_Name (Tname, 'H'); | |
7410 | DT_Prims : constant Entity_Id := | |
7411 | Make_Defining_Identifier (Loc, | |
7412 | Name_DT_Prims); | |
7413 | DT_Prims_Acc : constant Entity_Id := | |
7414 | Make_Defining_Identifier (Loc, | |
7415 | Name_DT_Prims_Acc); | |
7416 | begin | |
7417 | Append_To (Result, | |
7418 | Make_Full_Type_Declaration (Loc, | |
7419 | Defining_Identifier => DT_Prims, | |
7420 | Type_Definition => | |
7421 | Make_Constrained_Array_Definition (Loc, | |
7422 | Discrete_Subtype_Definitions => New_List ( | |
7423 | Make_Range (Loc, | |
7424 | Low_Bound => Make_Integer_Literal (Loc, 1), | |
7425 | High_Bound => Make_Integer_Literal (Loc, | |
7426 | DT_Entry_Count | |
7427 | (First_Tag_Component (Typ))))), | |
7428 | Component_Definition => | |
7429 | Make_Component_Definition (Loc, | |
7430 | Subtype_Indication => | |
83c6c069 | 7431 | New_Occurrence_Of (RTE (RE_Prim_Ptr), Loc))))); |
17e14451 | 7432 | |
dffd0a90 | 7433 | Append_To (Result, |
7434 | Make_Full_Type_Declaration (Loc, | |
7435 | Defining_Identifier => DT_Prims_Acc, | |
7436 | Type_Definition => | |
7437 | Make_Access_To_Object_Definition (Loc, | |
7438 | Subtype_Indication => | |
7439 | New_Occurrence_Of (DT_Prims, Loc)))); | |
17e14451 | 7440 | |
dffd0a90 | 7441 | Append_Elmt (DT_Prims_Acc, Access_Disp_Table (Typ)); |
17e14451 | 7442 | |
dffd0a90 | 7443 | -- Analyze the resulting list and suppress the generation of the |
7444 | -- Init_Proc associated with the above array declaration because | |
7445 | -- this type is never used in object declarations. It is only used | |
7446 | -- to simplify the expansion associated with dispatching calls. | |
17e14451 | 7447 | |
dffd0a90 | 7448 | Analyze_List (Result); |
649455a4 | 7449 | Set_Suppress_Initialization (Base_Type (DT_Prims)); |
cc60bd16 | 7450 | |
ff6293ec | 7451 | -- Disable backend optimizations based on assumptions about the |
7452 | -- aliasing status of objects designated by the access to the | |
7453 | -- dispatch table. Required to handle dispatch tables imported | |
7454 | -- from C++. | |
7455 | ||
7456 | Set_No_Strict_Aliasing (Base_Type (DT_Prims_Acc)); | |
7457 | ||
d00681a7 | 7458 | -- Add the freezing nodes of these declarations; required to avoid |
7459 | -- generating these freezing nodes in wrong scopes (for example in | |
7460 | -- the IC routine of a derivation of Typ). | |
02a2406d | 7461 | |
d03ada96 | 7462 | -- What is an "IC routine"? Is "init_proc" meant here??? |
d00681a7 | 7463 | |
d74fc39a | 7464 | Append_List_To (Result, Freeze_Entity (DT_Prims, Typ)); |
7465 | Append_List_To (Result, Freeze_Entity (DT_Prims_Acc, Typ)); | |
d00681a7 | 7466 | |
dffd0a90 | 7467 | -- Mark entity of dispatch table. Required by the back end to |
7468 | -- handle them properly. | |
cc60bd16 | 7469 | |
dffd0a90 | 7470 | Set_Is_Dispatch_Table_Entity (DT_Prims); |
7471 | end; | |
7472 | end if; | |
17e14451 | 7473 | |
11bd2f46 | 7474 | -- Mark entities of dispatch table. Required by the back end to handle |
7475 | -- them properly. | |
7640ed3d | 7476 | |
7477 | if Present (DT) then | |
7478 | Set_Is_Dispatch_Table_Entity (DT); | |
7479 | Set_Is_Dispatch_Table_Entity (Etype (DT)); | |
7480 | end if; | |
7481 | ||
d04be62f | 7482 | if Present (Iface_DT) then |
7483 | Set_Is_Dispatch_Table_Entity (Iface_DT); | |
7484 | Set_Is_Dispatch_Table_Entity (Etype (Iface_DT)); | |
7485 | end if; | |
7486 | ||
d00681a7 | 7487 | if Is_CPP_Class (Root_Type (Typ)) then |
7488 | Set_Ekind (DT_Ptr, E_Variable); | |
7489 | else | |
7490 | Set_Ekind (DT_Ptr, E_Constant); | |
7491 | end if; | |
7492 | ||
cdb1c38f | 7493 | Set_Is_Tag (DT_Ptr); |
7494 | Set_Related_Type (DT_Ptr, Typ); | |
7495 | ||
17e14451 | 7496 | return Result; |
7497 | end Make_Tags; | |
7498 | ||
cd534f03 | 7499 | --------------- |
7500 | -- New_Value -- | |
7501 | --------------- | |
7502 | ||
7503 | function New_Value (From : Node_Id) return Node_Id is | |
7504 | Res : constant Node_Id := Duplicate_Subexpr (From); | |
7505 | begin | |
7506 | if Is_Access_Type (Etype (From)) then | |
02a2406d | 7507 | return Make_Explicit_Dereference (Sloc (From), Prefix => Res); |
cd534f03 | 7508 | else |
7509 | return Res; | |
7510 | end if; | |
7511 | end New_Value; | |
7512 | ||
ee6ba406 | 7513 | ----------------------------------- |
7514 | -- Original_View_In_Visible_Part -- | |
7515 | ----------------------------------- | |
7516 | ||
7517 | function Original_View_In_Visible_Part (Typ : Entity_Id) return Boolean is | |
7518 | Scop : constant Entity_Id := Scope (Typ); | |
7519 | ||
7520 | begin | |
7521 | -- The scope must be a package | |
7522 | ||
65149aa0 | 7523 | if not Is_Package_Or_Generic_Package (Scop) then |
ee6ba406 | 7524 | return False; |
7525 | end if; | |
7526 | ||
7527 | -- A type with a private declaration has a private view declared in | |
7528 | -- the visible part. | |
7529 | ||
7530 | if Has_Private_Declaration (Typ) then | |
7531 | return True; | |
7532 | end if; | |
7533 | ||
7534 | return List_Containing (Parent (Typ)) = | |
e8b4793a | 7535 | Visible_Declarations (Package_Specification (Scop)); |
ee6ba406 | 7536 | end Original_View_In_Visible_Part; |
7537 | ||
d62940bf | 7538 | ------------------ |
7539 | -- Prim_Op_Kind -- | |
7540 | ------------------ | |
7541 | ||
7542 | function Prim_Op_Kind | |
7543 | (Prim : Entity_Id; | |
7544 | Typ : Entity_Id) return Node_Id | |
7545 | is | |
7546 | Full_Typ : Entity_Id := Typ; | |
7547 | Loc : constant Source_Ptr := Sloc (Prim); | |
68f95949 | 7548 | Prim_Op : Entity_Id; |
d62940bf | 7549 | |
7550 | begin | |
7551 | -- Retrieve the original primitive operation | |
7552 | ||
fc2907f6 | 7553 | Prim_Op := Ultimate_Alias (Prim); |
d62940bf | 7554 | |
7555 | if Ekind (Typ) = E_Record_Type | |
7556 | and then Present (Corresponding_Concurrent_Type (Typ)) | |
7557 | then | |
7558 | Full_Typ := Corresponding_Concurrent_Type (Typ); | |
7559 | end if; | |
7560 | ||
d77e048b | 7561 | -- When a private tagged type is completed by a concurrent type, |
7562 | -- retrieve the full view. | |
7563 | ||
7564 | if Is_Private_Type (Full_Typ) then | |
7565 | Full_Typ := Full_View (Full_Typ); | |
7566 | end if; | |
7567 | ||
d62940bf | 7568 | if Ekind (Prim_Op) = E_Function then |
7569 | ||
7570 | -- Protected function | |
7571 | ||
7572 | if Ekind (Full_Typ) = E_Protected_Type then | |
83c6c069 | 7573 | return New_Occurrence_Of (RTE (RE_POK_Protected_Function), Loc); |
d62940bf | 7574 | |
76a1c25b | 7575 | -- Task function |
7576 | ||
7577 | elsif Ekind (Full_Typ) = E_Task_Type then | |
83c6c069 | 7578 | return New_Occurrence_Of (RTE (RE_POK_Task_Function), Loc); |
76a1c25b | 7579 | |
d62940bf | 7580 | -- Regular function |
7581 | ||
7582 | else | |
83c6c069 | 7583 | return New_Occurrence_Of (RTE (RE_POK_Function), Loc); |
d62940bf | 7584 | end if; |
7585 | ||
7586 | else | |
7587 | pragma Assert (Ekind (Prim_Op) = E_Procedure); | |
7588 | ||
7589 | if Ekind (Full_Typ) = E_Protected_Type then | |
7590 | ||
7591 | -- Protected entry | |
7592 | ||
7593 | if Is_Primitive_Wrapper (Prim_Op) | |
7594 | and then Ekind (Wrapped_Entity (Prim_Op)) = E_Entry | |
7595 | then | |
83c6c069 | 7596 | return New_Occurrence_Of (RTE (RE_POK_Protected_Entry), Loc); |
d62940bf | 7597 | |
7598 | -- Protected procedure | |
7599 | ||
7600 | else | |
83c6c069 | 7601 | return |
7602 | New_Occurrence_Of (RTE (RE_POK_Protected_Procedure), Loc); | |
d62940bf | 7603 | end if; |
7604 | ||
7605 | elsif Ekind (Full_Typ) = E_Task_Type then | |
7606 | ||
7607 | -- Task entry | |
7608 | ||
7609 | if Is_Primitive_Wrapper (Prim_Op) | |
7610 | and then Ekind (Wrapped_Entity (Prim_Op)) = E_Entry | |
7611 | then | |
83c6c069 | 7612 | return New_Occurrence_Of (RTE (RE_POK_Task_Entry), Loc); |
d62940bf | 7613 | |
7614 | -- Task "procedure". These are the internally Expander-generated | |
7615 | -- procedures (task body for instance). | |
7616 | ||
7617 | else | |
83c6c069 | 7618 | return New_Occurrence_Of (RTE (RE_POK_Task_Procedure), Loc); |
d62940bf | 7619 | end if; |
7620 | ||
7621 | -- Regular procedure | |
7622 | ||
7623 | else | |
83c6c069 | 7624 | return New_Occurrence_Of (RTE (RE_POK_Procedure), Loc); |
d62940bf | 7625 | end if; |
7626 | end if; | |
7627 | end Prim_Op_Kind; | |
7628 | ||
725a69d2 | 7629 | ------------------------ |
7630 | -- Register_Primitive -- | |
7631 | ------------------------ | |
7632 | ||
49260fa5 | 7633 | function Register_Primitive |
725a69d2 | 7634 | (Loc : Source_Ptr; |
49260fa5 | 7635 | Prim : Entity_Id) return List_Id |
725a69d2 | 7636 | is |
cdb1c38f | 7637 | DT_Ptr : Entity_Id; |
7638 | Iface_Prim : Entity_Id; | |
7639 | Iface_Typ : Entity_Id; | |
7640 | Iface_DT_Ptr : Entity_Id; | |
7641 | Iface_DT_Elmt : Elmt_Id; | |
49260fa5 | 7642 | L : constant List_Id := New_List; |
cdb1c38f | 7643 | Pos : Uint; |
7644 | Tag : Entity_Id; | |
cc60bd16 | 7645 | Tag_Typ : Entity_Id; |
cdb1c38f | 7646 | Thunk_Id : Entity_Id; |
7647 | Thunk_Code : Node_Id; | |
725a69d2 | 7648 | |
7649 | begin | |
7650 | pragma Assert (not Restriction_Active (No_Dispatching_Calls)); | |
79500ea0 | 7651 | pragma Assert (VM_Target = No_VM); |
725a69d2 | 7652 | |
3f8cf2d2 | 7653 | -- Do not register in the dispatch table eliminated primitives |
7654 | ||
7655 | if not RTE_Available (RE_Tag) | |
7656 | or else Is_Eliminated (Ultimate_Alias (Prim)) | |
7657 | then | |
49260fa5 | 7658 | return L; |
725a69d2 | 7659 | end if; |
7660 | ||
a652dd51 | 7661 | if not Present (Interface_Alias (Prim)) then |
cc60bd16 | 7662 | Tag_Typ := Scope (DTC_Entity (Prim)); |
acf97c11 | 7663 | Pos := DT_Position (Prim); |
cc60bd16 | 7664 | Tag := First_Tag_Component (Tag_Typ); |
725a69d2 | 7665 | |
7666 | if Is_Predefined_Dispatching_Operation (Prim) | |
7667 | or else Is_Predefined_Dispatching_Alias (Prim) | |
7668 | then | |
cc60bd16 | 7669 | DT_Ptr := |
7670 | Node (Next_Elmt (First_Elmt (Access_Disp_Table (Tag_Typ)))); | |
7671 | ||
49260fa5 | 7672 | Append_To (L, |
725a69d2 | 7673 | Build_Set_Predefined_Prim_Op_Address (Loc, |
83c6c069 | 7674 | Tag_Node => New_Occurrence_Of (DT_Ptr, Loc), |
725a69d2 | 7675 | Position => Pos, |
acf97c11 | 7676 | Address_Node => |
cc60bd16 | 7677 | Unchecked_Convert_To (RTE (RE_Prim_Ptr), |
acf97c11 | 7678 | Make_Attribute_Reference (Loc, |
83c6c069 | 7679 | Prefix => New_Occurrence_Of (Prim, Loc), |
acf97c11 | 7680 | Attribute_Name => Name_Unrestricted_Access)))); |
725a69d2 | 7681 | |
9e7de1e1 | 7682 | -- Register copy of the pointer to the 'size primitive in the TSD |
cc60bd16 | 7683 | |
7684 | if Chars (Prim) = Name_uSize | |
7685 | and then RTE_Record_Component_Available (RE_Size_Func) | |
7686 | then | |
7687 | DT_Ptr := Node (First_Elmt (Access_Disp_Table (Tag_Typ))); | |
49260fa5 | 7688 | Append_To (L, |
cc60bd16 | 7689 | Build_Set_Size_Function (Loc, |
83c6c069 | 7690 | Tag_Node => New_Occurrence_Of (DT_Ptr, Loc), |
cc60bd16 | 7691 | Size_Func => Prim)); |
7692 | end if; | |
7693 | ||
725a69d2 | 7694 | else |
7695 | pragma Assert (Pos /= Uint_0 and then Pos <= DT_Entry_Count (Tag)); | |
7696 | ||
d00681a7 | 7697 | -- Skip registration of primitives located in the C++ part of the |
7698 | -- dispatch table. Their slot is set by the IC routine. | |
7699 | ||
7700 | if not Is_CPP_Class (Root_Type (Tag_Typ)) | |
7701 | or else Pos > CPP_Num_Prims (Tag_Typ) | |
7702 | then | |
7703 | DT_Ptr := Node (First_Elmt (Access_Disp_Table (Tag_Typ))); | |
7704 | Append_To (L, | |
7705 | Build_Set_Prim_Op_Address (Loc, | |
7706 | Typ => Tag_Typ, | |
83c6c069 | 7707 | Tag_Node => New_Occurrence_Of (DT_Ptr, Loc), |
d00681a7 | 7708 | Position => Pos, |
7709 | Address_Node => | |
7710 | Unchecked_Convert_To (RTE (RE_Prim_Ptr), | |
7711 | Make_Attribute_Reference (Loc, | |
83c6c069 | 7712 | Prefix => New_Occurrence_Of (Prim, Loc), |
d00681a7 | 7713 | Attribute_Name => Name_Unrestricted_Access)))); |
7714 | end if; | |
725a69d2 | 7715 | end if; |
7716 | ||
7717 | -- Ada 2005 (AI-251): Primitive associated with an interface type | |
02a2406d | 7718 | |
725a69d2 | 7719 | -- Generate the code of the thunk only if the interface type is not an |
7720 | -- immediate ancestor of Typ; otherwise the dispatch table associated | |
7721 | -- with the interface is the primary dispatch table and we have nothing | |
7722 | -- else to do here. | |
7723 | ||
7724 | else | |
cc60bd16 | 7725 | Tag_Typ := Find_Dispatching_Type (Alias (Prim)); |
a652dd51 | 7726 | Iface_Typ := Find_Dispatching_Type (Interface_Alias (Prim)); |
725a69d2 | 7727 | |
7728 | pragma Assert (Is_Interface (Iface_Typ)); | |
7729 | ||
c8da6114 | 7730 | -- No action needed for interfaces that are ancestors of Typ because |
7731 | -- their primitives are located in the primary dispatch table. | |
7732 | ||
cb4af01d | 7733 | if Is_Ancestor (Iface_Typ, Tag_Typ, Use_Full_View => True) then |
c8da6114 | 7734 | return L; |
d00681a7 | 7735 | |
7736 | -- No action needed for primitives located in the C++ part of the | |
7737 | -- dispatch table. Their slot is set by the IC routine. | |
7738 | ||
7739 | elsif Is_CPP_Class (Root_Type (Tag_Typ)) | |
7740 | and then DT_Position (Alias (Prim)) <= CPP_Num_Prims (Tag_Typ) | |
7741 | and then not Is_Predefined_Dispatching_Operation (Prim) | |
7742 | and then not Is_Predefined_Dispatching_Alias (Prim) | |
7743 | then | |
7744 | return L; | |
c8da6114 | 7745 | end if; |
7746 | ||
17e14451 | 7747 | Expand_Interface_Thunk (Prim, Thunk_Id, Thunk_Code); |
725a69d2 | 7748 | |
cb4af01d | 7749 | if not Is_Ancestor (Iface_Typ, Tag_Typ, Use_Full_View => True) |
725a69d2 | 7750 | and then Present (Thunk_Code) |
7751 | then | |
725a69d2 | 7752 | -- Generate the code necessary to fill the appropriate entry of |
7753 | -- the secondary dispatch table of Prim's controlling type with | |
7754 | -- Thunk_Id's address. | |
7755 | ||
cc60bd16 | 7756 | Iface_DT_Elmt := Find_Interface_ADT (Tag_Typ, Iface_Typ); |
cdb1c38f | 7757 | Iface_DT_Ptr := Node (Iface_DT_Elmt); |
7758 | pragma Assert (Has_Thunks (Iface_DT_Ptr)); | |
7759 | ||
a652dd51 | 7760 | Iface_Prim := Interface_Alias (Prim); |
acf97c11 | 7761 | Pos := DT_Position (Iface_Prim); |
7762 | Tag := First_Tag_Component (Iface_Typ); | |
49260fa5 | 7763 | |
7764 | Prepend_To (L, Thunk_Code); | |
725a69d2 | 7765 | |
7766 | if Is_Predefined_Dispatching_Operation (Prim) | |
7767 | or else Is_Predefined_Dispatching_Alias (Prim) | |
7768 | then | |
cdb1c38f | 7769 | Append_To (L, |
725a69d2 | 7770 | Build_Set_Predefined_Prim_Op_Address (Loc, |
acf97c11 | 7771 | Tag_Node => |
83c6c069 | 7772 | New_Occurrence_Of (Node (Next_Elmt (Iface_DT_Elmt)), Loc), |
725a69d2 | 7773 | Position => Pos, |
7774 | Address_Node => | |
cc60bd16 | 7775 | Unchecked_Convert_To (RTE (RE_Prim_Ptr), |
acf97c11 | 7776 | Make_Attribute_Reference (Loc, |
83c6c069 | 7777 | Prefix => New_Occurrence_Of (Thunk_Id, Loc), |
acf97c11 | 7778 | Attribute_Name => Name_Unrestricted_Access)))); |
cdb1c38f | 7779 | |
acf97c11 | 7780 | Next_Elmt (Iface_DT_Elmt); |
cdb1c38f | 7781 | Next_Elmt (Iface_DT_Elmt); |
7782 | Iface_DT_Ptr := Node (Iface_DT_Elmt); | |
7783 | pragma Assert (not Has_Thunks (Iface_DT_Ptr)); | |
7784 | ||
7785 | Append_To (L, | |
7786 | Build_Set_Predefined_Prim_Op_Address (Loc, | |
acf97c11 | 7787 | Tag_Node => |
83c6c069 | 7788 | New_Occurrence_Of (Node (Next_Elmt (Iface_DT_Elmt)), Loc), |
cdb1c38f | 7789 | Position => Pos, |
7790 | Address_Node => | |
cc60bd16 | 7791 | Unchecked_Convert_To (RTE (RE_Prim_Ptr), |
acf97c11 | 7792 | Make_Attribute_Reference (Loc, |
4055a532 | 7793 | Prefix => |
83c6c069 | 7794 | New_Occurrence_Of (Alias (Prim), Loc), |
acf97c11 | 7795 | Attribute_Name => Name_Unrestricted_Access)))); |
cdb1c38f | 7796 | |
725a69d2 | 7797 | else |
7798 | pragma Assert (Pos /= Uint_0 | |
7799 | and then Pos <= DT_Entry_Count (Tag)); | |
7800 | ||
cdb1c38f | 7801 | Append_To (L, |
7802 | Build_Set_Prim_Op_Address (Loc, | |
7803 | Typ => Iface_Typ, | |
83c6c069 | 7804 | Tag_Node => New_Occurrence_Of (Iface_DT_Ptr, Loc), |
cdb1c38f | 7805 | Position => Pos, |
acf97c11 | 7806 | Address_Node => |
cc60bd16 | 7807 | Unchecked_Convert_To (RTE (RE_Prim_Ptr), |
acf97c11 | 7808 | Make_Attribute_Reference (Loc, |
83c6c069 | 7809 | Prefix => New_Occurrence_Of (Thunk_Id, Loc), |
acf97c11 | 7810 | Attribute_Name => Name_Unrestricted_Access)))); |
cdb1c38f | 7811 | |
acf97c11 | 7812 | Next_Elmt (Iface_DT_Elmt); |
cdb1c38f | 7813 | Next_Elmt (Iface_DT_Elmt); |
7814 | Iface_DT_Ptr := Node (Iface_DT_Elmt); | |
7815 | pragma Assert (not Has_Thunks (Iface_DT_Ptr)); | |
7816 | ||
7817 | Append_To (L, | |
725a69d2 | 7818 | Build_Set_Prim_Op_Address (Loc, |
7819 | Typ => Iface_Typ, | |
83c6c069 | 7820 | Tag_Node => New_Occurrence_Of (Iface_DT_Ptr, Loc), |
725a69d2 | 7821 | Position => Pos, |
acf97c11 | 7822 | Address_Node => |
cc60bd16 | 7823 | Unchecked_Convert_To (RTE (RE_Prim_Ptr), |
acf97c11 | 7824 | Make_Attribute_Reference (Loc, |
4055a532 | 7825 | Prefix => |
83c6c069 | 7826 | New_Occurrence_Of (Alias (Prim), Loc), |
acf97c11 | 7827 | Attribute_Name => Name_Unrestricted_Access)))); |
cdb1c38f | 7828 | |
725a69d2 | 7829 | end if; |
7830 | end if; | |
7831 | end if; | |
49260fa5 | 7832 | |
7833 | return L; | |
725a69d2 | 7834 | end Register_Primitive; |
7835 | ||
ee6ba406 | 7836 | ------------------------- |
7837 | -- Set_All_DT_Position -- | |
7838 | ------------------------- | |
7839 | ||
7840 | procedure Set_All_DT_Position (Typ : Entity_Id) is | |
ee6ba406 | 7841 | |
cf365b48 | 7842 | function In_Predef_Prims_DT (Prim : Entity_Id) return Boolean; |
7843 | -- Returns True if Prim is located in the dispatch table of | |
7844 | -- predefined primitives | |
7845 | ||
aad6babd | 7846 | procedure Validate_Position (Prim : Entity_Id); |
02a2406d | 7847 | -- Check that position assigned to Prim is completely safe (it has not |
7848 | -- been assigned to a previously defined primitive operation of Typ). | |
aad6babd | 7849 | |
cf365b48 | 7850 | ------------------------ |
7851 | -- In_Predef_Prims_DT -- | |
7852 | ------------------------ | |
7853 | ||
7854 | function In_Predef_Prims_DT (Prim : Entity_Id) return Boolean is | |
7855 | E : Entity_Id; | |
7856 | ||
7857 | begin | |
7858 | -- Predefined primitives | |
7859 | ||
7860 | if Is_Predefined_Dispatching_Operation (Prim) then | |
7861 | return True; | |
7862 | ||
7863 | -- Renamings of predefined primitives | |
7864 | ||
7865 | elsif Present (Alias (Prim)) | |
7866 | and then Is_Predefined_Dispatching_Operation (Ultimate_Alias (Prim)) | |
7867 | then | |
7868 | if Chars (Ultimate_Alias (Prim)) /= Name_Op_Eq then | |
7869 | return True; | |
7870 | ||
7871 | -- User-defined renamings of predefined equality have their own | |
7872 | -- slot in the primary dispatch table | |
7873 | ||
7874 | else | |
7875 | E := Prim; | |
7876 | while Present (Alias (E)) loop | |
7877 | if Comes_From_Source (E) then | |
7878 | return False; | |
7879 | end if; | |
7880 | ||
7881 | E := Alias (E); | |
7882 | end loop; | |
7883 | ||
7884 | return not Comes_From_Source (E); | |
7885 | end if; | |
7886 | ||
7887 | -- User-defined primitives | |
7888 | ||
7889 | else | |
7890 | return False; | |
7891 | end if; | |
7892 | end In_Predef_Prims_DT; | |
7893 | ||
aad6babd | 7894 | ----------------------- |
7895 | -- Validate_Position -- | |
7896 | ----------------------- | |
7897 | ||
7898 | procedure Validate_Position (Prim : Entity_Id) is | |
af647dc7 | 7899 | Op_Elmt : Elmt_Id; |
7900 | Op : Entity_Id; | |
d62940bf | 7901 | |
aad6babd | 7902 | begin |
af647dc7 | 7903 | -- Aliased primitives are safe |
7904 | ||
7905 | if Present (Alias (Prim)) then | |
7906 | return; | |
7907 | end if; | |
7908 | ||
7909 | Op_Elmt := First_Elmt (Primitive_Operations (Typ)); | |
7910 | while Present (Op_Elmt) loop | |
7911 | Op := Node (Op_Elmt); | |
7912 | ||
7913 | -- No need to check against itself | |
7914 | ||
7915 | if Op = Prim then | |
7916 | null; | |
7917 | ||
aad6babd | 7918 | -- Primitive operations covering abstract interfaces are |
7919 | -- allocated later | |
7920 | ||
a652dd51 | 7921 | elsif Present (Interface_Alias (Op)) then |
aad6babd | 7922 | null; |
7923 | ||
68f95949 | 7924 | -- Predefined dispatching operations are completely safe. They |
7925 | -- are allocated at fixed positions in a separate table. | |
aad6babd | 7926 | |
af647dc7 | 7927 | elsif Is_Predefined_Dispatching_Operation (Op) |
7928 | or else Is_Predefined_Dispatching_Alias (Op) | |
7929 | then | |
aad6babd | 7930 | null; |
ee6ba406 | 7931 | |
aad6babd | 7932 | -- Aliased subprograms are safe |
7933 | ||
af647dc7 | 7934 | elsif Present (Alias (Op)) then |
aad6babd | 7935 | null; |
7936 | ||
af647dc7 | 7937 | elsif DT_Position (Op) = DT_Position (Prim) |
7938 | and then not Is_Predefined_Dispatching_Operation (Op) | |
7939 | and then not Is_Predefined_Dispatching_Operation (Prim) | |
7940 | and then not Is_Predefined_Dispatching_Alias (Op) | |
7941 | and then not Is_Predefined_Dispatching_Alias (Prim) | |
7942 | then | |
d62940bf | 7943 | -- Handle aliased subprograms |
7944 | ||
7945 | declare | |
7946 | Op_1 : Entity_Id; | |
7947 | Op_2 : Entity_Id; | |
7948 | ||
7949 | begin | |
af647dc7 | 7950 | Op_1 := Op; |
d62940bf | 7951 | loop |
7952 | if Present (Overridden_Operation (Op_1)) then | |
7953 | Op_1 := Overridden_Operation (Op_1); | |
7954 | elsif Present (Alias (Op_1)) then | |
7955 | Op_1 := Alias (Op_1); | |
7956 | else | |
7957 | exit; | |
7958 | end if; | |
7959 | end loop; | |
7960 | ||
7961 | Op_2 := Prim; | |
7962 | loop | |
7963 | if Present (Overridden_Operation (Op_2)) then | |
7964 | Op_2 := Overridden_Operation (Op_2); | |
7965 | elsif Present (Alias (Op_2)) then | |
7966 | Op_2 := Alias (Op_2); | |
7967 | else | |
7968 | exit; | |
7969 | end if; | |
7970 | end loop; | |
7971 | ||
7972 | if Op_1 /= Op_2 then | |
7973 | raise Program_Error; | |
7974 | end if; | |
7975 | end; | |
aad6babd | 7976 | end if; |
7977 | ||
af647dc7 | 7978 | Next_Elmt (Op_Elmt); |
aad6babd | 7979 | end loop; |
7980 | end Validate_Position; | |
7981 | ||
af647dc7 | 7982 | -- Local variables |
7983 | ||
7984 | Parent_Typ : constant Entity_Id := Etype (Typ); | |
af647dc7 | 7985 | First_Prim : constant Elmt_Id := First_Elmt (Primitive_Operations (Typ)); |
7986 | The_Tag : constant Entity_Id := First_Tag_Component (Typ); | |
7987 | ||
651a38ec | 7988 | Adjusted : Boolean := False; |
7989 | Finalized : Boolean := False; | |
af647dc7 | 7990 | |
343d35dc | 7991 | Count_Prim : Nat; |
7992 | DT_Length : Nat; | |
7993 | Nb_Prim : Nat; | |
af647dc7 | 7994 | Prim : Entity_Id; |
7995 | Prim_Elmt : Elmt_Id; | |
7996 | ||
aad6babd | 7997 | -- Start of processing for Set_All_DT_Position |
7998 | ||
7999 | begin | |
a652dd51 | 8000 | pragma Assert (Present (First_Tag_Component (Typ))); |
8001 | ||
b3dd22b3 | 8002 | -- Set the DT_Position for each primitive operation. Perform some sanity |
8003 | -- checks to avoid building inconsistent dispatch tables. | |
ee6ba406 | 8004 | |
02a2406d | 8005 | -- First stage: Set DTC entity of all the primitive operations. This is |
8006 | -- required to properly read the DT_Position attribute in latter stages. | |
ee6ba406 | 8007 | |
343d35dc | 8008 | Prim_Elmt := First_Prim; |
8009 | Count_Prim := 0; | |
8010 | while Present (Prim_Elmt) loop | |
8011 | Prim := Node (Prim_Elmt); | |
ee6ba406 | 8012 | |
343d35dc | 8013 | -- Predefined primitives have a separate dispatch table |
ee6ba406 | 8014 | |
cf365b48 | 8015 | if not In_Predef_Prims_DT (Prim) then |
343d35dc | 8016 | Count_Prim := Count_Prim + 1; |
8017 | end if; | |
ee6ba406 | 8018 | |
725a69d2 | 8019 | Set_DTC_Entity_Value (Typ, Prim); |
ee6ba406 | 8020 | |
343d35dc | 8021 | -- Clear any previous value of the DT_Position attribute. In this |
8022 | -- way we ensure that the final position of all the primitives is | |
36b938a3 | 8023 | -- established by the following stages of this algorithm. |
ee6ba406 | 8024 | |
ad274a73 | 8025 | Set_DT_Position_Value (Prim, No_Uint); |
ee6ba406 | 8026 | |
343d35dc | 8027 | Next_Elmt (Prim_Elmt); |
8028 | end loop; | |
ee6ba406 | 8029 | |
343d35dc | 8030 | declare |
acf97c11 | 8031 | Fixed_Prim : array (Int range 0 .. Count_Prim) of Boolean := |
8032 | (others => False); | |
8033 | ||
343d35dc | 8034 | E : Entity_Id; |
ee6ba406 | 8035 | |
725a69d2 | 8036 | procedure Handle_Inherited_Private_Subprograms (Typ : Entity_Id); |
8037 | -- Called if Typ is declared in a nested package or a public child | |
8038 | -- package to handle inherited primitives that were inherited by Typ | |
509f74d3 | 8039 | -- in the visible part, but whose declaration was deferred because |
725a69d2 | 8040 | -- the parent operation was private and not visible at that point. |
8041 | ||
343d35dc | 8042 | procedure Set_Fixed_Prim (Pos : Nat); |
8043 | -- Sets to true an element of the Fixed_Prim table to indicate | |
8044 | -- that this entry of the dispatch table of Typ is occupied. | |
ee6ba406 | 8045 | |
725a69d2 | 8046 | ------------------------------------------ |
8047 | -- Handle_Inherited_Private_Subprograms -- | |
8048 | ------------------------------------------ | |
8049 | ||
8050 | procedure Handle_Inherited_Private_Subprograms (Typ : Entity_Id) is | |
8051 | Op_List : Elist_Id; | |
8052 | Op_Elmt : Elmt_Id; | |
8053 | Op_Elmt_2 : Elmt_Id; | |
8054 | Prim_Op : Entity_Id; | |
8055 | Parent_Subp : Entity_Id; | |
8056 | ||
8057 | begin | |
8058 | Op_List := Primitive_Operations (Typ); | |
8059 | ||
8060 | Op_Elmt := First_Elmt (Op_List); | |
8061 | while Present (Op_Elmt) loop | |
8062 | Prim_Op := Node (Op_Elmt); | |
8063 | ||
8064 | -- Search primitives that are implicit operations with an | |
8065 | -- internal name whose parent operation has a normal name. | |
8066 | ||
8067 | if Present (Alias (Prim_Op)) | |
8068 | and then Find_Dispatching_Type (Alias (Prim_Op)) /= Typ | |
8069 | and then not Comes_From_Source (Prim_Op) | |
8070 | and then Is_Internal_Name (Chars (Prim_Op)) | |
8071 | and then not Is_Internal_Name (Chars (Alias (Prim_Op))) | |
8072 | then | |
8073 | Parent_Subp := Alias (Prim_Op); | |
8074 | ||
8075 | -- Check if the type has an explicit overriding for this | |
8076 | -- primitive. | |
8077 | ||
8078 | Op_Elmt_2 := Next_Elmt (Op_Elmt); | |
8079 | while Present (Op_Elmt_2) loop | |
8080 | if Chars (Node (Op_Elmt_2)) = Chars (Parent_Subp) | |
8081 | and then Type_Conformant (Prim_Op, Node (Op_Elmt_2)) | |
8082 | then | |
ad274a73 | 8083 | Set_DT_Position_Value (Prim_Op, |
8084 | DT_Position (Parent_Subp)); | |
8085 | Set_DT_Position_Value (Node (Op_Elmt_2), | |
725a69d2 | 8086 | DT_Position (Parent_Subp)); |
8087 | Set_Fixed_Prim (UI_To_Int (DT_Position (Prim_Op))); | |
8088 | ||
8089 | goto Next_Primitive; | |
8090 | end if; | |
8091 | ||
8092 | Next_Elmt (Op_Elmt_2); | |
8093 | end loop; | |
8094 | end if; | |
8095 | ||
8096 | <<Next_Primitive>> | |
8097 | Next_Elmt (Op_Elmt); | |
8098 | end loop; | |
8099 | end Handle_Inherited_Private_Subprograms; | |
8100 | ||
343d35dc | 8101 | -------------------- |
8102 | -- Set_Fixed_Prim -- | |
8103 | -------------------- | |
ee6ba406 | 8104 | |
343d35dc | 8105 | procedure Set_Fixed_Prim (Pos : Nat) is |
ee6ba406 | 8106 | begin |
9e7de1e1 | 8107 | pragma Assert (Pos <= Count_Prim); |
343d35dc | 8108 | Fixed_Prim (Pos) := True; |
8109 | exception | |
8110 | when Constraint_Error => | |
8111 | raise Program_Error; | |
8112 | end Set_Fixed_Prim; | |
ee6ba406 | 8113 | |
343d35dc | 8114 | begin |
725a69d2 | 8115 | -- In case of nested packages and public child package it may be |
8116 | -- necessary a special management on inherited subprograms so that | |
8117 | -- the dispatch table is properly filled. | |
8118 | ||
8119 | if Ekind (Scope (Scope (Typ))) = E_Package | |
8120 | and then Scope (Scope (Typ)) /= Standard_Standard | |
8121 | and then ((Is_Derived_Type (Typ) and then not Is_Private_Type (Typ)) | |
8122 | or else | |
8123 | (Nkind (Parent (Typ)) = N_Private_Extension_Declaration | |
8124 | and then Is_Generic_Type (Typ))) | |
8125 | and then In_Open_Scopes (Scope (Etype (Typ))) | |
5b990e08 | 8126 | and then Is_Base_Type (Typ) |
725a69d2 | 8127 | then |
8128 | Handle_Inherited_Private_Subprograms (Typ); | |
8129 | end if; | |
8130 | ||
343d35dc | 8131 | -- Second stage: Register fixed entries |
ee6ba406 | 8132 | |
343d35dc | 8133 | Nb_Prim := 0; |
8134 | Prim_Elmt := First_Prim; | |
8135 | while Present (Prim_Elmt) loop | |
8136 | Prim := Node (Prim_Elmt); | |
ee6ba406 | 8137 | |
343d35dc | 8138 | -- Predefined primitives have a separate table and all its |
8139 | -- entries are at predefined fixed positions. | |
ee6ba406 | 8140 | |
cf365b48 | 8141 | if In_Predef_Prims_DT (Prim) then |
8142 | if Is_Predefined_Dispatching_Operation (Prim) then | |
ad274a73 | 8143 | Set_DT_Position_Value (Prim, |
8144 | Default_Prim_Op_Position (Prim)); | |
ee6ba406 | 8145 | |
cf365b48 | 8146 | else pragma Assert (Present (Alias (Prim))); |
ad274a73 | 8147 | Set_DT_Position_Value (Prim, |
cf365b48 | 8148 | Default_Prim_Op_Position (Ultimate_Alias (Prim))); |
8149 | end if; | |
d62940bf | 8150 | |
343d35dc | 8151 | -- Overriding primitives of ancestor abstract interfaces |
ee6ba406 | 8152 | |
a652dd51 | 8153 | elsif Present (Interface_Alias (Prim)) |
8154 | and then Is_Ancestor | |
cb4af01d | 8155 | (Find_Dispatching_Type (Interface_Alias (Prim)), Typ, |
8156 | Use_Full_View => True) | |
343d35dc | 8157 | then |
8158 | pragma Assert (DT_Position (Prim) = No_Uint | |
a652dd51 | 8159 | and then Present (DTC_Entity (Interface_Alias (Prim)))); |
ee6ba406 | 8160 | |
a652dd51 | 8161 | E := Interface_Alias (Prim); |
ad274a73 | 8162 | Set_DT_Position_Value (Prim, DT_Position (E)); |
aad6babd | 8163 | |
343d35dc | 8164 | pragma Assert |
8165 | (DT_Position (Alias (Prim)) = No_Uint | |
8166 | or else DT_Position (Alias (Prim)) = DT_Position (E)); | |
ad274a73 | 8167 | Set_DT_Position_Value (Alias (Prim), DT_Position (E)); |
343d35dc | 8168 | Set_Fixed_Prim (UI_To_Int (DT_Position (Prim))); |
af647dc7 | 8169 | |
343d35dc | 8170 | -- Overriding primitives must use the same entry as the |
36b938a3 | 8171 | -- overridden primitive. |
af647dc7 | 8172 | |
a652dd51 | 8173 | elsif not Present (Interface_Alias (Prim)) |
343d35dc | 8174 | and then Present (Alias (Prim)) |
17e14451 | 8175 | and then Chars (Prim) = Chars (Alias (Prim)) |
343d35dc | 8176 | and then Find_Dispatching_Type (Alias (Prim)) /= Typ |
a652dd51 | 8177 | and then Is_Ancestor |
cb4af01d | 8178 | (Find_Dispatching_Type (Alias (Prim)), Typ, |
8179 | Use_Full_View => True) | |
343d35dc | 8180 | and then Present (DTC_Entity (Alias (Prim))) |
af647dc7 | 8181 | then |
343d35dc | 8182 | E := Alias (Prim); |
ad274a73 | 8183 | Set_DT_Position_Value (Prim, DT_Position (E)); |
aad6babd | 8184 | |
343d35dc | 8185 | if not Is_Predefined_Dispatching_Alias (E) then |
8186 | Set_Fixed_Prim (UI_To_Int (DT_Position (E))); | |
8187 | end if; | |
9dfe12ae | 8188 | end if; |
ee6ba406 | 8189 | |
aad6babd | 8190 | Next_Elmt (Prim_Elmt); |
8191 | end loop; | |
8192 | ||
02a2406d | 8193 | -- Third stage: Fix the position of all the new primitives. Entries |
8194 | -- associated with primitives covering interfaces are handled in a | |
8195 | -- latter round. | |
aad6babd | 8196 | |
343d35dc | 8197 | Prim_Elmt := First_Prim; |
8198 | while Present (Prim_Elmt) loop | |
8199 | Prim := Node (Prim_Elmt); | |
aad6babd | 8200 | |
343d35dc | 8201 | -- Skip primitives previously set entries |
aad6babd | 8202 | |
343d35dc | 8203 | if DT_Position (Prim) /= No_Uint then |
8204 | null; | |
aad6babd | 8205 | |
343d35dc | 8206 | -- Primitives covering interface primitives are handled later |
aad6babd | 8207 | |
a652dd51 | 8208 | elsif Present (Interface_Alias (Prim)) then |
343d35dc | 8209 | null; |
aad6babd | 8210 | |
343d35dc | 8211 | else |
8212 | -- Take the next available position in the DT | |
aad6babd | 8213 | |
343d35dc | 8214 | loop |
8215 | Nb_Prim := Nb_Prim + 1; | |
8216 | pragma Assert (Nb_Prim <= Count_Prim); | |
8217 | exit when not Fixed_Prim (Nb_Prim); | |
8218 | end loop; | |
aad6babd | 8219 | |
ad274a73 | 8220 | Set_DT_Position_Value (Prim, UI_From_Int (Nb_Prim)); |
343d35dc | 8221 | Set_Fixed_Prim (Nb_Prim); |
8222 | end if; | |
aad6babd | 8223 | |
343d35dc | 8224 | Next_Elmt (Prim_Elmt); |
8225 | end loop; | |
8226 | end; | |
aad6babd | 8227 | |
343d35dc | 8228 | -- Fourth stage: Complete the decoration of primitives covering |
02a2406d | 8229 | -- interfaces (that is, propagate the DT_Position attribute from |
8230 | -- the aliased primitive) | |
aad6babd | 8231 | |
343d35dc | 8232 | Prim_Elmt := First_Prim; |
8233 | while Present (Prim_Elmt) loop | |
8234 | Prim := Node (Prim_Elmt); | |
aad6babd | 8235 | |
343d35dc | 8236 | if DT_Position (Prim) = No_Uint |
a652dd51 | 8237 | and then Present (Interface_Alias (Prim)) |
343d35dc | 8238 | then |
8239 | pragma Assert (Present (Alias (Prim)) | |
8240 | and then Find_Dispatching_Type (Alias (Prim)) = Typ); | |
aad6babd | 8241 | |
343d35dc | 8242 | -- Check if this entry will be placed in the primary DT |
aad6babd | 8243 | |
a652dd51 | 8244 | if Is_Ancestor |
cb4af01d | 8245 | (Find_Dispatching_Type (Interface_Alias (Prim)), Typ, |
8246 | Use_Full_View => True) | |
ee6ba406 | 8247 | then |
343d35dc | 8248 | pragma Assert (DT_Position (Alias (Prim)) /= No_Uint); |
ad274a73 | 8249 | Set_DT_Position_Value (Prim, DT_Position (Alias (Prim))); |
aad6babd | 8250 | |
343d35dc | 8251 | -- Otherwise it will be placed in the secondary DT |
aad6babd | 8252 | |
343d35dc | 8253 | else |
8254 | pragma Assert | |
a652dd51 | 8255 | (DT_Position (Interface_Alias (Prim)) /= No_Uint); |
ad274a73 | 8256 | Set_DT_Position_Value (Prim, |
a652dd51 | 8257 | DT_Position (Interface_Alias (Prim))); |
aad6babd | 8258 | end if; |
343d35dc | 8259 | end if; |
aad6babd | 8260 | |
343d35dc | 8261 | Next_Elmt (Prim_Elmt); |
8262 | end loop; | |
d62940bf | 8263 | |
02a2406d | 8264 | -- Generate listing showing the contents of the dispatch tables. This |
8265 | -- action is done before some further static checks because in case of | |
8266 | -- critical errors caused by a wrong dispatch table we need to see the | |
8267 | -- contents of such table. | |
d62940bf | 8268 | |
343d35dc | 8269 | if Debug_Flag_ZZ then |
8270 | Write_DT (Typ); | |
8271 | end if; | |
aad6babd | 8272 | |
343d35dc | 8273 | -- Final stage: Ensure that the table is correct plus some further |
8274 | -- verifications concerning the primitives. | |
aad6babd | 8275 | |
343d35dc | 8276 | Prim_Elmt := First_Prim; |
8277 | DT_Length := 0; | |
8278 | while Present (Prim_Elmt) loop | |
8279 | Prim := Node (Prim_Elmt); | |
aad6babd | 8280 | |
02a2406d | 8281 | -- At this point all the primitives MUST have a position in the |
8282 | -- dispatch table. | |
aad6babd | 8283 | |
343d35dc | 8284 | if DT_Position (Prim) = No_Uint then |
8285 | raise Program_Error; | |
8286 | end if; | |
aad6babd | 8287 | |
343d35dc | 8288 | -- Calculate real size of the dispatch table |
aad6babd | 8289 | |
cf365b48 | 8290 | if not In_Predef_Prims_DT (Prim) |
343d35dc | 8291 | and then UI_To_Int (DT_Position (Prim)) > DT_Length |
8292 | then | |
8293 | DT_Length := UI_To_Int (DT_Position (Prim)); | |
8294 | end if; | |
aad6babd | 8295 | |
02a2406d | 8296 | -- Ensure that the assigned position to non-predefined dispatching |
8297 | -- operations in the dispatch table is correct. | |
aad6babd | 8298 | |
cf365b48 | 8299 | if not Is_Predefined_Dispatching_Operation (Prim) |
8300 | and then not Is_Predefined_Dispatching_Alias (Prim) | |
343d35dc | 8301 | then |
8302 | Validate_Position (Prim); | |
8303 | end if; | |
ee6ba406 | 8304 | |
343d35dc | 8305 | if Chars (Prim) = Name_Finalize then |
8306 | Finalized := True; | |
8307 | end if; | |
ee6ba406 | 8308 | |
343d35dc | 8309 | if Chars (Prim) = Name_Adjust then |
8310 | Adjusted := True; | |
8311 | end if; | |
af647dc7 | 8312 | |
503f7fd3 | 8313 | -- An abstract operation cannot be declared in the private part for a |
8314 | -- visible abstract type, because it can't be overridden outside this | |
8315 | -- package hierarchy. For explicit declarations this is checked at | |
8316 | -- the point of declaration, but for inherited operations it must be | |
8317 | -- done when building the dispatch table. | |
343d35dc | 8318 | |
a652dd51 | 8319 | -- Ada 2005 (AI-251): Primitives associated with interfaces are |
8320 | -- excluded from this check because interfaces must be visible in | |
8321 | -- the public and private part (RM 7.3 (7.3/2)) | |
343d35dc | 8322 | |
02a2406d | 8323 | -- We disable this check in Relaxed_RM_Semantics mode, to accommodate |
8324 | -- legacy Ada code. | |
6da4d289 | 8325 | |
a9cd517c | 8326 | if not Relaxed_RM_Semantics |
6da4d289 | 8327 | and then Is_Abstract_Type (Typ) |
343d35dc | 8328 | and then Is_Abstract_Subprogram (Prim) |
8329 | and then Present (Alias (Prim)) | |
a652dd51 | 8330 | and then not Is_Interface |
8331 | (Find_Dispatching_Type (Ultimate_Alias (Prim))) | |
8332 | and then not Present (Interface_Alias (Prim)) | |
343d35dc | 8333 | and then Is_Derived_Type (Typ) |
8334 | and then In_Private_Part (Current_Scope) | |
8335 | and then | |
8336 | List_Containing (Parent (Prim)) = | |
e8b4793a | 8337 | Private_Declarations (Package_Specification (Current_Scope)) |
343d35dc | 8338 | and then Original_View_In_Visible_Part (Typ) |
8339 | then | |
8340 | -- We exclude Input and Output stream operations because | |
02a2406d | 8341 | -- Limited_Controlled inherits useless Input and Output stream |
8342 | -- operations from Root_Controlled, which can never be overridden. | |
ee6ba406 | 8343 | |
343d35dc | 8344 | if not Is_TSS (Prim, TSS_Stream_Input) |
8345 | and then | |
8346 | not Is_TSS (Prim, TSS_Stream_Output) | |
ee6ba406 | 8347 | then |
503f7fd3 | 8348 | Error_Msg_NE |
343d35dc | 8349 | ("abstract inherited private operation&" & |
17e14451 | 8350 | " must be overridden (RM 3.9.3(10))", |
343d35dc | 8351 | Parent (Typ), Prim); |
ee6ba406 | 8352 | end if; |
343d35dc | 8353 | end if; |
aad6babd | 8354 | |
343d35dc | 8355 | Next_Elmt (Prim_Elmt); |
8356 | end loop; | |
ee6ba406 | 8357 | |
343d35dc | 8358 | -- Additional check |
aad6babd | 8359 | |
343d35dc | 8360 | if Is_Controlled (Typ) then |
8361 | if not Finalized then | |
503f7fd3 | 8362 | Error_Msg_N |
cb97ae5c | 8363 | ("controlled type has no explicit Finalize method??", Typ); |
ee6ba406 | 8364 | |
343d35dc | 8365 | elsif not Adjusted then |
503f7fd3 | 8366 | Error_Msg_N |
cb97ae5c | 8367 | ("controlled type has no explicit Adjust method??", Typ); |
ee6ba406 | 8368 | end if; |
343d35dc | 8369 | end if; |
ee6ba406 | 8370 | |
343d35dc | 8371 | -- Set the final size of the Dispatch Table |
aad6babd | 8372 | |
343d35dc | 8373 | Set_DT_Entry_Count (The_Tag, UI_From_Int (DT_Length)); |
ee6ba406 | 8374 | |
725a69d2 | 8375 | -- The derived type must have at least as many components as its parent |
acf97c11 | 8376 | -- (for root types Etype points to itself and the test cannot fail). |
aad6babd | 8377 | |
725a69d2 | 8378 | if DT_Entry_Count (The_Tag) < |
8379 | DT_Entry_Count (First_Tag_Component (Parent_Typ)) | |
8380 | then | |
8381 | raise Program_Error; | |
aad6babd | 8382 | end if; |
ee6ba406 | 8383 | end Set_All_DT_Position; |
8384 | ||
294b942d | 8385 | -------------------------- |
8386 | -- Set_CPP_Constructors -- | |
8387 | -------------------------- | |
ee6ba406 | 8388 | |
294b942d | 8389 | procedure Set_CPP_Constructors (Typ : Entity_Id) is |
d00681a7 | 8390 | |
95773554 | 8391 | function Gen_Parameters_Profile (E : Entity_Id) return List_Id; |
8392 | -- Duplicate the parameters profile of the imported C++ constructor | |
8393 | -- adding an access to the object as an additional parameter. | |
d00681a7 | 8394 | |
02a2406d | 8395 | ---------------------------- |
8396 | -- Gen_Parameters_Profile -- | |
8397 | ---------------------------- | |
8398 | ||
95773554 | 8399 | function Gen_Parameters_Profile (E : Entity_Id) return List_Id is |
8400 | Loc : constant Source_Ptr := Sloc (E); | |
8401 | Parms : List_Id; | |
8402 | P : Node_Id; | |
b8a17a21 | 8403 | |
d00681a7 | 8404 | begin |
95773554 | 8405 | Parms := |
8406 | New_List ( | |
8407 | Make_Parameter_Specification (Loc, | |
8408 | Defining_Identifier => | |
8409 | Make_Defining_Identifier (Loc, Name_uInit), | |
83c6c069 | 8410 | Parameter_Type => New_Occurrence_Of (Typ, Loc))); |
95773554 | 8411 | |
8412 | if Present (Parameter_Specifications (Parent (E))) then | |
8413 | P := First (Parameter_Specifications (Parent (E))); | |
8414 | while Present (P) loop | |
8415 | Append_To (Parms, | |
8416 | Make_Parameter_Specification (Loc, | |
8417 | Defining_Identifier => | |
8418 | Make_Defining_Identifier (Loc, | |
8419 | Chars => Chars (Defining_Identifier (P))), | |
8420 | Parameter_Type => New_Copy_Tree (Parameter_Type (P)), | |
8421 | Expression => New_Copy_Tree (Expression (P)))); | |
8422 | Next (P); | |
8423 | end loop; | |
d00681a7 | 8424 | end if; |
b8a17a21 | 8425 | |
95773554 | 8426 | return Parms; |
8427 | end Gen_Parameters_Profile; | |
d00681a7 | 8428 | |
8429 | -- Local variables | |
8430 | ||
95773554 | 8431 | Loc : Source_Ptr; |
8432 | E : Entity_Id; | |
8433 | Found : Boolean := False; | |
8434 | IP : Entity_Id; | |
8435 | IP_Body : Node_Id; | |
8436 | P : Node_Id; | |
8437 | Parms : List_Id; | |
d00681a7 | 8438 | |
c1b63034 | 8439 | Covers_Default_Constructor : Entity_Id := Empty; |
8440 | ||
8441 | -- Start of processing for Set_CPP_Constructor | |
8442 | ||
ee6ba406 | 8443 | begin |
d00681a7 | 8444 | pragma Assert (Is_CPP_Class (Typ)); |
8445 | ||
294b942d | 8446 | -- Look for the constructor entities |
ee6ba406 | 8447 | |
8448 | E := Next_Entity (Typ); | |
294b942d | 8449 | while Present (E) loop |
8450 | if Ekind (E) = E_Function | |
8451 | and then Is_Constructor (E) | |
8452 | then | |
294b942d | 8453 | Found := True; |
8454 | Loc := Sloc (E); | |
95773554 | 8455 | Parms := Gen_Parameters_Profile (E); |
8456 | IP := | |
8457 | Make_Defining_Identifier (Loc, | |
8458 | Chars => Make_Init_Proc_Name (Typ)); | |
8459 | ||
d1a2e31b | 8460 | -- Case 1: Constructor of untagged type |
95773554 | 8461 | |
8462 | -- If the C++ class has no virtual methods then the matching Ada | |
d1a2e31b | 8463 | -- type is an untagged record type. In such case there is no need |
95773554 | 8464 | -- to generate a wrapper of the C++ constructor because the _tag |
8465 | -- component is not available. | |
8466 | ||
8467 | if not Is_Tagged_Type (Typ) then | |
8468 | Discard_Node | |
8469 | (Make_Subprogram_Declaration (Loc, | |
8470 | Specification => | |
8471 | Make_Procedure_Specification (Loc, | |
8472 | Defining_Unit_Name => IP, | |
8473 | Parameter_Specifications => Parms))); | |
8474 | ||
8475 | Set_Init_Proc (Typ, IP); | |
8476 | Set_Is_Imported (IP); | |
8477 | Set_Is_Constructor (IP); | |
8478 | Set_Interface_Name (IP, Interface_Name (E)); | |
8479 | Set_Convention (IP, Convention_CPP); | |
8480 | Set_Is_Public (IP); | |
8481 | Set_Has_Completion (IP); | |
8482 | ||
8483 | -- Case 2: Constructor of a tagged type | |
8484 | ||
8485 | -- In this case we generate the IP as a wrapper of the the | |
8486 | -- C++ constructor because IP must also save copy of the _tag | |
8487 | -- generated in the C++ side. The copy of the _tag is used by | |
8488 | -- Build_CPP_Init_Procedure to elaborate derivations of C++ types. | |
d00681a7 | 8489 | |
95773554 | 8490 | -- Generate: |
8491 | -- procedure IP (_init : Typ; ...) is | |
8492 | -- procedure ConstructorP (_init : Typ; ...); | |
8493 | -- pragma Import (ConstructorP); | |
8494 | -- begin | |
8495 | -- ConstructorP (_init, ...); | |
8496 | -- if Typ._tag = null then | |
8497 | -- Typ._tag := _init._tag; | |
8498 | -- end if; | |
8499 | -- end IP; | |
d00681a7 | 8500 | |
95773554 | 8501 | else |
8502 | declare | |
8503 | Body_Stmts : constant List_Id := New_List; | |
8504 | Constructor_Id : Entity_Id; | |
8505 | Constructor_Decl_Node : Node_Id; | |
8506 | Init_Tags_List : List_Id; | |
d00681a7 | 8507 | |
95773554 | 8508 | begin |
8509 | Constructor_Id := Make_Temporary (Loc, 'P'); | |
d00681a7 | 8510 | |
95773554 | 8511 | Constructor_Decl_Node := |
8512 | Make_Subprogram_Declaration (Loc, | |
8513 | Make_Procedure_Specification (Loc, | |
8514 | Defining_Unit_Name => Constructor_Id, | |
8515 | Parameter_Specifications => Parms)); | |
d00681a7 | 8516 | |
95773554 | 8517 | Set_Is_Imported (Constructor_Id); |
8518 | Set_Is_Constructor (Constructor_Id); | |
8519 | Set_Interface_Name (Constructor_Id, Interface_Name (E)); | |
8520 | Set_Convention (Constructor_Id, Convention_CPP); | |
8521 | Set_Is_Public (Constructor_Id); | |
8522 | Set_Has_Completion (Constructor_Id); | |
d00681a7 | 8523 | |
95773554 | 8524 | -- Build the init procedure as a wrapper of this constructor |
d00681a7 | 8525 | |
95773554 | 8526 | Parms := Gen_Parameters_Profile (E); |
d00681a7 | 8527 | |
95773554 | 8528 | -- Invoke the C++ constructor |
d00681a7 | 8529 | |
95773554 | 8530 | declare |
8531 | Actuals : constant List_Id := New_List; | |
d00681a7 | 8532 | |
95773554 | 8533 | begin |
8534 | P := First (Parms); | |
8535 | while Present (P) loop | |
8536 | Append_To (Actuals, | |
83c6c069 | 8537 | New_Occurrence_Of (Defining_Identifier (P), Loc)); |
95773554 | 8538 | Next (P); |
8539 | end loop; | |
d00681a7 | 8540 | |
95773554 | 8541 | Append_To (Body_Stmts, |
8542 | Make_Procedure_Call_Statement (Loc, | |
83c6c069 | 8543 | Name => New_Occurrence_Of (Constructor_Id, Loc), |
95773554 | 8544 | Parameter_Associations => Actuals)); |
8545 | end; | |
d00681a7 | 8546 | |
95773554 | 8547 | -- Initialize copies of C++ primary and secondary tags |
d00681a7 | 8548 | |
95773554 | 8549 | Init_Tags_List := New_List; |
d00681a7 | 8550 | |
95773554 | 8551 | declare |
8552 | Tag_Elmt : Elmt_Id; | |
8553 | Tag_Comp : Node_Id; | |
d00681a7 | 8554 | |
95773554 | 8555 | begin |
8556 | Tag_Elmt := First_Elmt (Access_Disp_Table (Typ)); | |
8557 | Tag_Comp := First_Tag_Component (Typ); | |
d00681a7 | 8558 | |
95773554 | 8559 | while Present (Tag_Elmt) |
8560 | and then Is_Tag (Node (Tag_Elmt)) | |
8561 | loop | |
8562 | -- Skip the following assertion with primary tags | |
8563 | -- because Related_Type is not set on primary tag | |
8564 | -- components | |
8565 | ||
8566 | pragma Assert | |
8567 | (Tag_Comp = First_Tag_Component (Typ) | |
8568 | or else Related_Type (Node (Tag_Elmt)) | |
8569 | = Related_Type (Tag_Comp)); | |
8570 | ||
8571 | Append_To (Init_Tags_List, | |
8572 | Make_Assignment_Statement (Loc, | |
8573 | Name => | |
83c6c069 | 8574 | New_Occurrence_Of (Node (Tag_Elmt), Loc), |
95773554 | 8575 | Expression => |
8576 | Make_Selected_Component (Loc, | |
8577 | Prefix => | |
8578 | Make_Identifier (Loc, Name_uInit), | |
8579 | Selector_Name => | |
83c6c069 | 8580 | New_Occurrence_Of (Tag_Comp, Loc)))); |
d00681a7 | 8581 | |
95773554 | 8582 | Tag_Comp := Next_Tag_Component (Tag_Comp); |
8583 | Next_Elmt (Tag_Elmt); | |
8584 | end loop; | |
8585 | end; | |
d00681a7 | 8586 | |
95773554 | 8587 | Append_To (Body_Stmts, |
8588 | Make_If_Statement (Loc, | |
8589 | Condition => | |
8590 | Make_Op_Eq (Loc, | |
8591 | Left_Opnd => | |
83c6c069 | 8592 | New_Occurrence_Of |
95773554 | 8593 | (Node (First_Elmt (Access_Disp_Table (Typ))), |
8594 | Loc), | |
8595 | Right_Opnd => | |
8596 | Unchecked_Convert_To (RTE (RE_Tag), | |
83c6c069 | 8597 | New_Occurrence_Of (RTE (RE_Null_Address), Loc))), |
95773554 | 8598 | Then_Statements => Init_Tags_List)); |
8599 | ||
8600 | IP_Body := | |
8601 | Make_Subprogram_Body (Loc, | |
8602 | Specification => | |
8603 | Make_Procedure_Specification (Loc, | |
8604 | Defining_Unit_Name => IP, | |
8605 | Parameter_Specifications => Parms), | |
8606 | Declarations => New_List (Constructor_Decl_Node), | |
8607 | Handled_Statement_Sequence => | |
8608 | Make_Handled_Sequence_Of_Statements (Loc, | |
8609 | Statements => Body_Stmts, | |
8610 | Exception_Handlers => No_List)); | |
8611 | ||
8612 | Discard_Node (IP_Body); | |
8613 | Set_Init_Proc (Typ, IP); | |
8614 | end; | |
8615 | end if; | |
c1b63034 | 8616 | |
02a2406d | 8617 | -- If this constructor has parameters and all its parameters have |
8618 | -- defaults then it covers the default constructor. The semantic | |
8619 | -- analyzer ensures that only one constructor with defaults covers | |
8620 | -- the default constructor. | |
c1b63034 | 8621 | |
8622 | if Present (Parameter_Specifications (Parent (E))) | |
8623 | and then Needs_No_Actuals (E) | |
8624 | then | |
95773554 | 8625 | Covers_Default_Constructor := IP; |
c1b63034 | 8626 | end if; |
294b942d | 8627 | end if; |
8628 | ||
ee6ba406 | 8629 | Next_Entity (E); |
8630 | end loop; | |
8631 | ||
9dfe12ae | 8632 | -- If there are no constructors, mark the type as abstract since we |
ee6ba406 | 8633 | -- won't be able to declare objects of that type. |
8634 | ||
294b942d | 8635 | if not Found then |
343d35dc | 8636 | Set_Is_Abstract_Type (Typ); |
ee6ba406 | 8637 | end if; |
d00681a7 | 8638 | |
c1b63034 | 8639 | -- Handle constructor that has all its parameters with defaults and |
8640 | -- hence it covers the default constructor. We generate a wrapper IP | |
8641 | -- which calls the covering constructor. | |
8642 | ||
8643 | if Present (Covers_Default_Constructor) then | |
95773554 | 8644 | declare |
8645 | Body_Stmts : List_Id; | |
c1b63034 | 8646 | |
95773554 | 8647 | begin |
8648 | Loc := Sloc (Covers_Default_Constructor); | |
c1b63034 | 8649 | |
95773554 | 8650 | Body_Stmts := New_List ( |
8651 | Make_Procedure_Call_Statement (Loc, | |
8652 | Name => | |
83c6c069 | 8653 | New_Occurrence_Of (Covers_Default_Constructor, Loc), |
95773554 | 8654 | Parameter_Associations => New_List ( |
8655 | Make_Identifier (Loc, Name_uInit)))); | |
c1b63034 | 8656 | |
95773554 | 8657 | IP := Make_Defining_Identifier (Loc, Make_Init_Proc_Name (Typ)); |
c1b63034 | 8658 | |
95773554 | 8659 | IP_Body := |
8660 | Make_Subprogram_Body (Loc, | |
8661 | Specification => | |
8662 | Make_Procedure_Specification (Loc, | |
8663 | Defining_Unit_Name => IP, | |
8664 | Parameter_Specifications => New_List ( | |
8665 | Make_Parameter_Specification (Loc, | |
8666 | Defining_Identifier => | |
8667 | Make_Defining_Identifier (Loc, Name_uInit), | |
83c6c069 | 8668 | Parameter_Type => New_Occurrence_Of (Typ, Loc)))), |
c1b63034 | 8669 | |
95773554 | 8670 | Declarations => No_List, |
8671 | ||
8672 | Handled_Statement_Sequence => | |
8673 | Make_Handled_Sequence_Of_Statements (Loc, | |
8674 | Statements => Body_Stmts, | |
8675 | Exception_Handlers => No_List)); | |
8676 | ||
8677 | Discard_Node (IP_Body); | |
8678 | Set_Init_Proc (Typ, IP); | |
8679 | end; | |
c1b63034 | 8680 | end if; |
8681 | ||
d00681a7 | 8682 | -- If the CPP type has constructors then it must import also the default |
8683 | -- C++ constructor. It is required for default initialization of objects | |
8684 | -- of the type. It is also required to elaborate objects of Ada types | |
8685 | -- that are defined as derivations of this CPP type. | |
8686 | ||
8687 | if Has_CPP_Constructors (Typ) | |
8688 | and then No (Init_Proc (Typ)) | |
8689 | then | |
cb97ae5c | 8690 | Error_Msg_N ("??default constructor must be imported from C++", Typ); |
d00681a7 | 8691 | end if; |
294b942d | 8692 | end Set_CPP_Constructors; |
ee6ba406 | 8693 | |
ad274a73 | 8694 | --------------------------- |
8695 | -- Set_DT_Position_Value -- | |
8696 | --------------------------- | |
8697 | ||
8698 | procedure Set_DT_Position_Value (Prim : Entity_Id; Value : Uint) is | |
8699 | begin | |
8700 | Set_DT_Position (Prim, Value); | |
8701 | ||
8702 | -- Propagate the value to the wrapped subprogram (if one is present) | |
8703 | ||
8704 | if Ekind_In (Prim, E_Function, E_Procedure) | |
8705 | and then Is_Primitive_Wrapper (Prim) | |
8706 | and then Present (Wrapped_Entity (Prim)) | |
8707 | and then Is_Dispatching_Operation (Wrapped_Entity (Prim)) | |
8708 | then | |
8709 | Set_DT_Position (Wrapped_Entity (Prim), Value); | |
8710 | end if; | |
8711 | end Set_DT_Position_Value; | |
8712 | ||
725a69d2 | 8713 | -------------------------- |
8714 | -- Set_DTC_Entity_Value -- | |
8715 | -------------------------- | |
8716 | ||
8717 | procedure Set_DTC_Entity_Value | |
8718 | (Tagged_Type : Entity_Id; | |
8719 | Prim : Entity_Id) | |
8720 | is | |
8721 | begin | |
a652dd51 | 8722 | if Present (Interface_Alias (Prim)) |
725a69d2 | 8723 | and then Is_Interface |
a652dd51 | 8724 | (Find_Dispatching_Type (Interface_Alias (Prim))) |
725a69d2 | 8725 | then |
8726 | Set_DTC_Entity (Prim, | |
8727 | Find_Interface_Tag | |
8728 | (T => Tagged_Type, | |
a652dd51 | 8729 | Iface => Find_Dispatching_Type (Interface_Alias (Prim)))); |
725a69d2 | 8730 | else |
8731 | Set_DTC_Entity (Prim, | |
8732 | First_Tag_Component (Tagged_Type)); | |
8733 | end if; | |
ad274a73 | 8734 | |
8735 | -- Propagate the value to the wrapped subprogram (if one is present) | |
8736 | ||
8737 | if Ekind_In (Prim, E_Function, E_Procedure) | |
8738 | and then Is_Primitive_Wrapper (Prim) | |
8739 | and then Present (Wrapped_Entity (Prim)) | |
8740 | and then Is_Dispatching_Operation (Wrapped_Entity (Prim)) | |
8741 | then | |
8742 | Set_DTC_Entity (Wrapped_Entity (Prim), DTC_Entity (Prim)); | |
8743 | end if; | |
725a69d2 | 8744 | end Set_DTC_Entity_Value; |
8745 | ||
952af0b9 | 8746 | ----------------- |
8747 | -- Tagged_Kind -- | |
8748 | ----------------- | |
8749 | ||
8750 | function Tagged_Kind (T : Entity_Id) return Node_Id is | |
8751 | Conc_Typ : Entity_Id; | |
8752 | Loc : constant Source_Ptr := Sloc (T); | |
8753 | ||
8754 | begin | |
68f95949 | 8755 | pragma Assert |
8756 | (Is_Tagged_Type (T) and then RTE_Available (RE_Tagged_Kind)); | |
952af0b9 | 8757 | |
8758 | -- Abstract kinds | |
8759 | ||
343d35dc | 8760 | if Is_Abstract_Type (T) then |
952af0b9 | 8761 | if Is_Limited_Record (T) then |
83c6c069 | 8762 | return New_Occurrence_Of |
8763 | (RTE (RE_TK_Abstract_Limited_Tagged), Loc); | |
952af0b9 | 8764 | else |
83c6c069 | 8765 | return New_Occurrence_Of |
8766 | (RTE (RE_TK_Abstract_Tagged), Loc); | |
952af0b9 | 8767 | end if; |
8768 | ||
8769 | -- Concurrent kinds | |
8770 | ||
8771 | elsif Is_Concurrent_Record_Type (T) then | |
8772 | Conc_Typ := Corresponding_Concurrent_Type (T); | |
8773 | ||
17e14451 | 8774 | if Present (Full_View (Conc_Typ)) then |
8775 | Conc_Typ := Full_View (Conc_Typ); | |
8776 | end if; | |
8777 | ||
952af0b9 | 8778 | if Ekind (Conc_Typ) = E_Protected_Type then |
83c6c069 | 8779 | return New_Occurrence_Of (RTE (RE_TK_Protected), Loc); |
952af0b9 | 8780 | else |
8781 | pragma Assert (Ekind (Conc_Typ) = E_Task_Type); | |
83c6c069 | 8782 | return New_Occurrence_Of (RTE (RE_TK_Task), Loc); |
952af0b9 | 8783 | end if; |
8784 | ||
8785 | -- Regular tagged kinds | |
8786 | ||
8787 | else | |
8788 | if Is_Limited_Record (T) then | |
83c6c069 | 8789 | return New_Occurrence_Of (RTE (RE_TK_Limited_Tagged), Loc); |
952af0b9 | 8790 | else |
83c6c069 | 8791 | return New_Occurrence_Of (RTE (RE_TK_Tagged), Loc); |
952af0b9 | 8792 | end if; |
8793 | end if; | |
8794 | end Tagged_Kind; | |
8795 | ||
aad6babd | 8796 | -------------- |
8797 | -- Write_DT -- | |
8798 | -------------- | |
8799 | ||
8800 | procedure Write_DT (Typ : Entity_Id) is | |
8801 | Elmt : Elmt_Id; | |
8802 | Prim : Node_Id; | |
8803 | ||
8804 | begin | |
8805 | -- Protect this procedure against wrong usage. Required because it will | |
8806 | -- be used directly from GDB | |
8807 | ||
17e14451 | 8808 | if not (Typ <= Last_Node_Id) |
aad6babd | 8809 | or else not Is_Tagged_Type (Typ) |
8810 | then | |
d62940bf | 8811 | Write_Str ("wrong usage: Write_DT must be used with tagged types"); |
aad6babd | 8812 | Write_Eol; |
8813 | return; | |
8814 | end if; | |
8815 | ||
8816 | Write_Int (Int (Typ)); | |
8817 | Write_Str (": "); | |
8818 | Write_Name (Chars (Typ)); | |
8819 | ||
8820 | if Is_Interface (Typ) then | |
8821 | Write_Str (" is interface"); | |
8822 | end if; | |
8823 | ||
8824 | Write_Eol; | |
8825 | ||
8826 | Elmt := First_Elmt (Primitive_Operations (Typ)); | |
8827 | while Present (Elmt) loop | |
8828 | Prim := Node (Elmt); | |
8829 | Write_Str (" - "); | |
8830 | ||
8831 | -- Indicate if this primitive will be allocated in the primary | |
8832 | -- dispatch table or in a secondary dispatch table associated | |
8833 | -- with an abstract interface type | |
8834 | ||
8835 | if Present (DTC_Entity (Prim)) then | |
8836 | if Etype (DTC_Entity (Prim)) = RTE (RE_Tag) then | |
8837 | Write_Str ("[P] "); | |
8838 | else | |
8839 | Write_Str ("[s] "); | |
8840 | end if; | |
8841 | end if; | |
8842 | ||
8843 | -- Output the node of this primitive operation and its name | |
8844 | ||
8845 | Write_Int (Int (Prim)); | |
8846 | Write_Str (": "); | |
68f95949 | 8847 | |
8848 | if Is_Predefined_Dispatching_Operation (Prim) then | |
8849 | Write_Str ("(predefined) "); | |
8850 | end if; | |
8851 | ||
b381b314 | 8852 | -- Prefix the name of the primitive with its corresponding tagged |
8853 | -- type to facilitate seeing inherited primitives. | |
8854 | ||
8855 | if Present (Alias (Prim)) then | |
8856 | Write_Name | |
8857 | (Chars (Find_Dispatching_Type (Ultimate_Alias (Prim)))); | |
8858 | else | |
8859 | Write_Name (Chars (Typ)); | |
8860 | end if; | |
8861 | ||
8862 | Write_Str ("."); | |
aad6babd | 8863 | Write_Name (Chars (Prim)); |
8864 | ||
8865 | -- Indicate if this primitive has an aliased primitive | |
8866 | ||
8867 | if Present (Alias (Prim)) then | |
8868 | Write_Str (" (alias = "); | |
8869 | Write_Int (Int (Alias (Prim))); | |
8870 | ||
8871 | -- If the DTC_Entity attribute is already set we can also output | |
4c58ddd7 | 8872 | -- the name of the interface covered by this primitive (if any). |
aad6babd | 8873 | |
f117057b | 8874 | if Ekind_In (Alias (Prim), E_Function, E_Procedure) |
8875 | and then Present (DTC_Entity (Alias (Prim))) | |
aad6babd | 8876 | and then Is_Interface (Scope (DTC_Entity (Alias (Prim)))) |
8877 | then | |
8878 | Write_Str (" from interface "); | |
8879 | Write_Name (Chars (Scope (DTC_Entity (Alias (Prim))))); | |
8880 | end if; | |
8881 | ||
a652dd51 | 8882 | if Present (Interface_Alias (Prim)) then |
aad6babd | 8883 | Write_Str (", AI_Alias of "); |
f235fede | 8884 | |
8885 | if Is_Null_Interface_Primitive (Interface_Alias (Prim)) then | |
8886 | Write_Str ("null primitive "); | |
8887 | end if; | |
8888 | ||
a652dd51 | 8889 | Write_Name |
8890 | (Chars (Find_Dispatching_Type (Interface_Alias (Prim)))); | |
aad6babd | 8891 | Write_Char (':'); |
a652dd51 | 8892 | Write_Int (Int (Interface_Alias (Prim))); |
aad6babd | 8893 | end if; |
8894 | ||
8895 | Write_Str (")"); | |
8896 | end if; | |
8897 | ||
8898 | -- Display the final position of this primitive in its associated | |
02a2406d | 8899 | -- (primary or secondary) dispatch table. |
aad6babd | 8900 | |
8901 | if Present (DTC_Entity (Prim)) | |
8902 | and then DT_Position (Prim) /= No_Uint | |
8903 | then | |
8904 | Write_Str (" at #"); | |
8905 | Write_Int (UI_To_Int (DT_Position (Prim))); | |
8906 | end if; | |
8907 | ||
343d35dc | 8908 | if Is_Abstract_Subprogram (Prim) then |
aad6babd | 8909 | Write_Str (" is abstract;"); |
af647dc7 | 8910 | |
8911 | -- Check if this is a null primitive | |
8912 | ||
8913 | elsif Comes_From_Source (Prim) | |
8914 | and then Ekind (Prim) = E_Procedure | |
8915 | and then Null_Present (Parent (Prim)) | |
8916 | then | |
8917 | Write_Str (" is null;"); | |
aad6babd | 8918 | end if; |
8919 | ||
555c63a6 | 8920 | if Is_Eliminated (Ultimate_Alias (Prim)) then |
8921 | Write_Str (" (eliminated)"); | |
8922 | end if; | |
8923 | ||
d00681a7 | 8924 | if Is_Imported (Prim) |
8925 | and then Convention (Prim) = Convention_CPP | |
8926 | then | |
8927 | Write_Str (" (C++)"); | |
8928 | end if; | |
8929 | ||
aad6babd | 8930 | Write_Eol; |
8931 | ||
8932 | Next_Elmt (Elmt); | |
8933 | end loop; | |
8934 | end Write_DT; | |
8935 | ||
ee6ba406 | 8936 | end Exp_Disp; |