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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 | -- -- | |
bb5dfacc | 9 | -- Copyright (C) 1992-2012, Free Software Foundation, Inc. -- |
ee6ba406 | 10 | -- -- |
11 | -- GNAT is free software; you can redistribute it and/or modify it under -- | |
12 | -- terms of the GNU General Public License as published by the Free Soft- -- | |
24971415 | 13 | -- ware Foundation; either version 3, or (at your option) any later ver- -- |
ee6ba406 | 14 | -- sion. GNAT is distributed in the hope that it will be useful, but WITH- -- |
15 | -- OUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY -- | |
16 | -- or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License -- | |
17 | -- for more details. You should have received a copy of the GNU General -- | |
24971415 | 18 | -- Public License distributed with GNAT; see file COPYING3. If not, go to -- |
19 | -- http://www.gnu.org/licenses for a complete copy of the license. -- | |
ee6ba406 | 20 | -- -- |
21 | -- GNAT was originally developed by the GNAT team at New York University. -- | |
e78e8c8e | 22 | -- Extensive contributions were provided by Ada Core Technologies Inc. -- |
ee6ba406 | 23 | -- -- |
24 | ------------------------------------------------------------------------------ | |
25 | ||
26 | with Atree; use Atree; | |
27 | with Checks; use Checks; | |
aad6babd | 28 | with Debug; use Debug; |
ee6ba406 | 29 | with Einfo; use Einfo; |
30 | with Elists; use Elists; | |
31 | with Errout; use Errout; | |
343d35dc | 32 | with Exp_Atag; use Exp_Atag; |
8a8d9086 | 33 | with Exp_Ch6; use Exp_Ch6; |
e00e091c | 34 | with Exp_CG; use Exp_CG; |
76a1c25b | 35 | with Exp_Dbug; use Exp_Dbug; |
ee6ba406 | 36 | with Exp_Tss; use Exp_Tss; |
37 | with Exp_Util; use Exp_Util; | |
af647dc7 | 38 | with Freeze; use Freeze; |
ee6ba406 | 39 | with Itypes; use Itypes; |
b6b96867 | 40 | with Layout; use Layout; |
ee6ba406 | 41 | with Nlists; use Nlists; |
42 | with Nmake; use Nmake; | |
aad6babd | 43 | with Namet; use Namet; |
ee6ba406 | 44 | with Opt; use Opt; |
aad6babd | 45 | with Output; use Output; |
68f95949 | 46 | with Restrict; use Restrict; |
47 | with Rident; use Rident; | |
ee6ba406 | 48 | with Rtsfind; use Rtsfind; |
aad6babd | 49 | with Sem; use Sem; |
d60c9ff7 | 50 | with Sem_Aux; use Sem_Aux; |
725a69d2 | 51 | with Sem_Ch6; use Sem_Ch6; |
acf97c11 | 52 | with Sem_Ch7; use Sem_Ch7; |
725a69d2 | 53 | with Sem_Ch8; use Sem_Ch8; |
ee6ba406 | 54 | with Sem_Disp; use Sem_Disp; |
725a69d2 | 55 | with Sem_Eval; use Sem_Eval; |
ee6ba406 | 56 | with Sem_Res; use Sem_Res; |
aad6babd | 57 | with Sem_Type; use Sem_Type; |
ee6ba406 | 58 | with Sem_Util; use Sem_Util; |
59 | with Sinfo; use Sinfo; | |
60 | with Snames; use Snames; | |
61 | with Stand; use Stand; | |
725a69d2 | 62 | with Stringt; use Stringt; |
5a44b136 | 63 | with SCIL_LL; use SCIL_LL; |
79500ea0 | 64 | with Targparm; use Targparm; |
ee6ba406 | 65 | with Tbuild; use Tbuild; |
66 | with Uintp; use Uintp; | |
67 | ||
68 | package body Exp_Disp is | |
69 | ||
725a69d2 | 70 | ----------------------- |
71 | -- Local Subprograms -- | |
72 | ----------------------- | |
ee6ba406 | 73 | |
68f95949 | 74 | function Default_Prim_Op_Position (E : Entity_Id) return Uint; |
aad6babd | 75 | -- Ada 2005 (AI-251): Returns the fixed position in the dispatch table |
76 | -- of the default primitive operations. | |
77 | ||
bb5dfacc | 78 | function Find_Specific_Type (CW : Entity_Id) return Entity_Id; |
79 | -- Find specific type of a class-wide type, and handle the case of an | |
ad6b44d8 | 80 | -- incomplete type coming either from a limited_with clause or from an |
81 | -- incomplete type declaration. Shouldn't this be in Sem_Util? It seems | |
82 | -- like a general purpose semantic routine ??? | |
bb5dfacc | 83 | |
24971415 | 84 | function Has_DT (Typ : Entity_Id) return Boolean; |
85 | pragma Inline (Has_DT); | |
86 | -- Returns true if we generate a dispatch table for tagged type Typ | |
87 | ||
af647dc7 | 88 | function Is_Predefined_Dispatching_Alias (Prim : Entity_Id) return Boolean; |
89 | -- Returns true if Prim is not a predefined dispatching primitive but it is | |
36b938a3 | 90 | -- an alias of a predefined dispatching primitive (i.e. through a renaming) |
af647dc7 | 91 | |
cd534f03 | 92 | function New_Value (From : Node_Id) return Node_Id; |
93 | -- From is the original Expression. New_Value is equivalent to a call | |
94 | -- to Duplicate_Subexpr with an explicit dereference when From is an | |
95 | -- access parameter. | |
96 | ||
ee6ba406 | 97 | function Original_View_In_Visible_Part (Typ : Entity_Id) return Boolean; |
98 | -- Check if the type has a private view or if the public view appears | |
99 | -- in the visible part of a package spec. | |
100 | ||
d62940bf | 101 | function Prim_Op_Kind |
102 | (Prim : Entity_Id; | |
103 | Typ : Entity_Id) return Node_Id; | |
104 | -- Ada 2005 (AI-345): Determine the primitive operation kind of Prim | |
952af0b9 | 105 | -- according to its type Typ. Return a reference to an RE_Prim_Op_Kind |
d62940bf | 106 | -- enumeration value. |
aad6babd | 107 | |
952af0b9 | 108 | function Tagged_Kind (T : Entity_Id) return Node_Id; |
109 | -- Ada 2005 (AI-345): Determine the tagged kind of T and return a reference | |
110 | -- to an RE_Tagged_Kind enumeration value. | |
111 | ||
cd534f03 | 112 | ---------------------- |
113 | -- Apply_Tag_Checks -- | |
114 | ---------------------- | |
115 | ||
116 | procedure Apply_Tag_Checks (Call_Node : Node_Id) is | |
117 | Loc : constant Source_Ptr := Sloc (Call_Node); | |
118 | Ctrl_Arg : constant Node_Id := Controlling_Argument (Call_Node); | |
119 | Ctrl_Typ : constant Entity_Id := Base_Type (Etype (Ctrl_Arg)); | |
120 | Param_List : constant List_Id := Parameter_Associations (Call_Node); | |
121 | ||
122 | Subp : Entity_Id; | |
123 | CW_Typ : Entity_Id; | |
124 | Param : Node_Id; | |
125 | Typ : Entity_Id; | |
126 | Eq_Prim_Op : Entity_Id := Empty; | |
127 | ||
128 | begin | |
129 | if No_Run_Time_Mode then | |
130 | Error_Msg_CRT ("tagged types", Call_Node); | |
131 | return; | |
132 | end if; | |
133 | ||
134 | -- Apply_Tag_Checks is called directly from the semantics, so we need | |
135 | -- a check to see whether expansion is active before proceeding. In | |
136 | -- addition, there is no need to expand the call when compiling under | |
137 | -- restriction No_Dispatching_Calls; the semantic analyzer has | |
138 | -- previously notified the violation of this restriction. | |
139 | ||
140 | if not Expander_Active | |
141 | or else Restriction_Active (No_Dispatching_Calls) | |
142 | then | |
143 | return; | |
144 | end if; | |
145 | ||
146 | -- Set subprogram. If this is an inherited operation that was | |
147 | -- overridden, the body that is being called is its alias. | |
148 | ||
149 | Subp := Entity (Name (Call_Node)); | |
150 | ||
151 | if Present (Alias (Subp)) | |
152 | and then Is_Inherited_Operation (Subp) | |
153 | and then No (DTC_Entity (Subp)) | |
154 | then | |
155 | Subp := Alias (Subp); | |
156 | end if; | |
157 | ||
158 | -- Definition of the class-wide type and the tagged type | |
159 | ||
160 | -- If the controlling argument is itself a tag rather than a tagged | |
161 | -- object, then use the class-wide type associated with the subprogram's | |
162 | -- controlling type. This case can occur when a call to an inherited | |
163 | -- primitive has an actual that originated from a default parameter | |
164 | -- given by a tag-indeterminate call and when there is no other | |
165 | -- controlling argument providing the tag (AI-239 requires dispatching). | |
166 | -- This capability of dispatching directly by tag is also needed by the | |
167 | -- implementation of AI-260 (for the generic dispatching constructors). | |
168 | ||
169 | if Ctrl_Typ = RTE (RE_Tag) | |
170 | or else (RTE_Available (RE_Interface_Tag) | |
171 | and then Ctrl_Typ = RTE (RE_Interface_Tag)) | |
172 | then | |
173 | CW_Typ := Class_Wide_Type (Find_Dispatching_Type (Subp)); | |
174 | ||
175 | -- Class_Wide_Type is applied to the expressions used to initialize | |
176 | -- CW_Typ, to ensure that CW_Typ always denotes a class-wide type, since | |
177 | -- there are cases where the controlling type is resolved to a specific | |
178 | -- type (such as for designated types of arguments such as CW'Access). | |
179 | ||
180 | elsif Is_Access_Type (Ctrl_Typ) then | |
181 | CW_Typ := Class_Wide_Type (Designated_Type (Ctrl_Typ)); | |
182 | ||
183 | else | |
184 | CW_Typ := Class_Wide_Type (Ctrl_Typ); | |
185 | end if; | |
186 | ||
bb5dfacc | 187 | Typ := Find_Specific_Type (CW_Typ); |
cd534f03 | 188 | |
189 | if not Is_Limited_Type (Typ) then | |
190 | Eq_Prim_Op := Find_Prim_Op (Typ, Name_Op_Eq); | |
191 | end if; | |
192 | ||
193 | -- Dispatching call to C++ primitive | |
194 | ||
195 | if Is_CPP_Class (Typ) then | |
196 | null; | |
197 | ||
198 | -- Dispatching call to Ada primitive | |
199 | ||
200 | elsif Present (Param_List) then | |
201 | ||
202 | -- Generate the Tag checks when appropriate | |
203 | ||
204 | Param := First_Actual (Call_Node); | |
205 | while Present (Param) loop | |
206 | ||
207 | -- No tag check with itself | |
208 | ||
209 | if Param = Ctrl_Arg then | |
210 | null; | |
211 | ||
212 | -- No tag check for parameter whose type is neither tagged nor | |
213 | -- access to tagged (for access parameters) | |
214 | ||
215 | elsif No (Find_Controlling_Arg (Param)) then | |
216 | null; | |
217 | ||
218 | -- No tag check for function dispatching on result if the | |
219 | -- Tag given by the context is this one | |
220 | ||
221 | elsif Find_Controlling_Arg (Param) = Ctrl_Arg then | |
222 | null; | |
223 | ||
224 | -- "=" is the only dispatching operation allowed to get | |
225 | -- operands with incompatible tags (it just returns false). | |
226 | -- We use Duplicate_Subexpr_Move_Checks instead of calling | |
227 | -- Relocate_Node because the value will be duplicated to | |
228 | -- check the tags. | |
229 | ||
230 | elsif Subp = Eq_Prim_Op then | |
231 | null; | |
232 | ||
233 | -- No check in presence of suppress flags | |
234 | ||
235 | elsif Tag_Checks_Suppressed (Etype (Param)) | |
236 | or else (Is_Access_Type (Etype (Param)) | |
237 | and then Tag_Checks_Suppressed | |
238 | (Designated_Type (Etype (Param)))) | |
239 | then | |
240 | null; | |
241 | ||
242 | -- Optimization: no tag checks if the parameters are identical | |
243 | ||
244 | elsif Is_Entity_Name (Param) | |
245 | and then Is_Entity_Name (Ctrl_Arg) | |
246 | and then Entity (Param) = Entity (Ctrl_Arg) | |
247 | then | |
248 | null; | |
249 | ||
250 | -- Now we need to generate the Tag check | |
251 | ||
252 | else | |
253 | -- Generate code for tag equality check | |
254 | -- Perhaps should have Checks.Apply_Tag_Equality_Check??? | |
255 | ||
256 | Insert_Action (Ctrl_Arg, | |
257 | Make_Implicit_If_Statement (Call_Node, | |
258 | Condition => | |
259 | Make_Op_Ne (Loc, | |
260 | Left_Opnd => | |
261 | Make_Selected_Component (Loc, | |
262 | Prefix => New_Value (Ctrl_Arg), | |
263 | Selector_Name => | |
264 | New_Reference_To | |
265 | (First_Tag_Component (Typ), Loc)), | |
266 | ||
267 | Right_Opnd => | |
268 | Make_Selected_Component (Loc, | |
269 | Prefix => | |
270 | Unchecked_Convert_To (Typ, New_Value (Param)), | |
271 | Selector_Name => | |
272 | New_Reference_To | |
273 | (First_Tag_Component (Typ), Loc))), | |
274 | ||
275 | Then_Statements => | |
276 | New_List (New_Constraint_Error (Loc)))); | |
277 | end if; | |
278 | ||
279 | Next_Actual (Param); | |
280 | end loop; | |
281 | end if; | |
282 | end Apply_Tag_Checks; | |
283 | ||
24971415 | 284 | ------------------------ |
285 | -- Building_Static_DT -- | |
286 | ------------------------ | |
287 | ||
288 | function Building_Static_DT (Typ : Entity_Id) return Boolean is | |
cc60bd16 | 289 | Root_Typ : Entity_Id := Root_Type (Typ); |
290 | ||
24971415 | 291 | begin |
cc60bd16 | 292 | -- Handle private types |
293 | ||
294 | if Present (Full_View (Root_Typ)) then | |
295 | Root_Typ := Full_View (Root_Typ); | |
296 | end if; | |
297 | ||
24971415 | 298 | return Static_Dispatch_Tables |
e7e688dd | 299 | and then Is_Library_Level_Tagged_Type (Typ) |
79500ea0 | 300 | and then VM_Target = No_VM |
e7e688dd | 301 | |
302 | -- If the type is derived from a CPP class we cannot statically | |
303 | -- build the dispatch tables because we must inherit primitives | |
304 | -- from the CPP side. | |
305 | ||
cc60bd16 | 306 | and then not Is_CPP_Class (Root_Typ); |
24971415 | 307 | end Building_Static_DT; |
308 | ||
17e14451 | 309 | ---------------------------------- |
310 | -- Build_Static_Dispatch_Tables -- | |
311 | ---------------------------------- | |
312 | ||
313 | procedure Build_Static_Dispatch_Tables (N : Entity_Id) is | |
314 | Target_List : List_Id; | |
315 | ||
316 | procedure Build_Dispatch_Tables (List : List_Id); | |
317 | -- Build the static dispatch table of tagged types found in the list of | |
318 | -- declarations. The generated nodes are added at the end of Target_List | |
319 | ||
320 | procedure Build_Package_Dispatch_Tables (N : Node_Id); | |
321 | -- Build static dispatch tables associated with package declaration N | |
322 | ||
323 | --------------------------- | |
324 | -- Build_Dispatch_Tables -- | |
325 | --------------------------- | |
326 | ||
327 | procedure Build_Dispatch_Tables (List : List_Id) is | |
328 | D : Node_Id; | |
329 | ||
330 | begin | |
331 | D := First (List); | |
332 | while Present (D) loop | |
333 | ||
334 | -- Handle nested packages and package bodies recursively. The | |
335 | -- generated code is placed on the Target_List established for | |
336 | -- the enclosing compilation unit. | |
337 | ||
338 | if Nkind (D) = N_Package_Declaration then | |
339 | Build_Package_Dispatch_Tables (D); | |
340 | ||
341 | elsif Nkind (D) = N_Package_Body then | |
342 | Build_Dispatch_Tables (Declarations (D)); | |
343 | ||
344 | elsif Nkind (D) = N_Package_Body_Stub | |
345 | and then Present (Library_Unit (D)) | |
346 | then | |
347 | Build_Dispatch_Tables | |
348 | (Declarations (Proper_Body (Unit (Library_Unit (D))))); | |
349 | ||
350 | -- Handle full type declarations and derivations of library | |
351 | -- level tagged types | |
352 | ||
3164ed99 | 353 | elsif Nkind_In (D, N_Full_Type_Declaration, |
354 | N_Derived_Type_Definition) | |
17e14451 | 355 | and then Is_Library_Level_Tagged_Type (Defining_Entity (D)) |
356 | and then Ekind (Defining_Entity (D)) /= E_Record_Subtype | |
357 | and then not Is_Private_Type (Defining_Entity (D)) | |
358 | then | |
442049cc | 359 | -- We do not generate dispatch tables for the internal types |
d9fac90e | 360 | -- created for a type extension with unknown discriminants |
361 | -- The needed information is shared with the source type, | |
362 | -- See Expand_N_Record_Extension. | |
363 | ||
442049cc | 364 | if Is_Underlying_Record_View (Defining_Entity (D)) |
365 | or else | |
366 | (not Comes_From_Source (Defining_Entity (D)) | |
367 | and then | |
2f29393f | 368 | Has_Unknown_Discriminants (Etype (Defining_Entity (D))) |
442049cc | 369 | and then |
2f29393f | 370 | not Comes_From_Source |
371 | (First_Subtype (Defining_Entity (D)))) | |
d9fac90e | 372 | then |
373 | null; | |
d9fac90e | 374 | else |
375 | Insert_List_After_And_Analyze (Last (Target_List), | |
376 | Make_DT (Defining_Entity (D))); | |
377 | end if; | |
17e14451 | 378 | |
379 | -- Handle private types of library level tagged types. We must | |
380 | -- exchange the private and full-view to ensure the correct | |
a735d663 | 381 | -- expansion. If the full view is a synchronized type ignore |
382 | -- the type because the table will be built for the corresponding | |
383 | -- record type, that has its own declaration. | |
17e14451 | 384 | |
385 | elsif (Nkind (D) = N_Private_Type_Declaration | |
386 | or else Nkind (D) = N_Private_Extension_Declaration) | |
387 | and then Present (Full_View (Defining_Entity (D))) | |
17e14451 | 388 | then |
389 | declare | |
acf97c11 | 390 | E1 : constant Entity_Id := Defining_Entity (D); |
a735d663 | 391 | E2 : constant Entity_Id := Full_View (E1); |
acf97c11 | 392 | |
17e14451 | 393 | begin |
a735d663 | 394 | if Is_Library_Level_Tagged_Type (E2) |
395 | and then Ekind (E2) /= E_Record_Subtype | |
396 | and then not Is_Concurrent_Type (E2) | |
397 | then | |
398 | Exchange_Declarations (E1); | |
399 | Insert_List_After_And_Analyze (Last (Target_List), | |
400 | Make_DT (E1)); | |
401 | Exchange_Declarations (E2); | |
402 | end if; | |
17e14451 | 403 | end; |
404 | end if; | |
405 | ||
406 | Next (D); | |
407 | end loop; | |
408 | end Build_Dispatch_Tables; | |
409 | ||
410 | ----------------------------------- | |
411 | -- Build_Package_Dispatch_Tables -- | |
412 | ----------------------------------- | |
413 | ||
414 | procedure Build_Package_Dispatch_Tables (N : Node_Id) is | |
415 | Spec : constant Node_Id := Specification (N); | |
416 | Id : constant Entity_Id := Defining_Entity (N); | |
417 | Vis_Decls : constant List_Id := Visible_Declarations (Spec); | |
418 | Priv_Decls : constant List_Id := Private_Declarations (Spec); | |
419 | ||
420 | begin | |
421 | Push_Scope (Id); | |
422 | ||
423 | if Present (Priv_Decls) then | |
424 | Build_Dispatch_Tables (Vis_Decls); | |
425 | Build_Dispatch_Tables (Priv_Decls); | |
426 | ||
427 | elsif Present (Vis_Decls) then | |
428 | Build_Dispatch_Tables (Vis_Decls); | |
429 | end if; | |
430 | ||
431 | Pop_Scope; | |
432 | end Build_Package_Dispatch_Tables; | |
433 | ||
434 | -- Start of processing for Build_Static_Dispatch_Tables | |
435 | ||
436 | begin | |
437 | if not Expander_Active | |
662256db | 438 | or else not Tagged_Type_Expansion |
17e14451 | 439 | then |
440 | return; | |
441 | end if; | |
442 | ||
443 | if Nkind (N) = N_Package_Declaration then | |
444 | declare | |
445 | Spec : constant Node_Id := Specification (N); | |
446 | Vis_Decls : constant List_Id := Visible_Declarations (Spec); | |
447 | Priv_Decls : constant List_Id := Private_Declarations (Spec); | |
448 | ||
449 | begin | |
450 | if Present (Priv_Decls) | |
451 | and then Is_Non_Empty_List (Priv_Decls) | |
452 | then | |
453 | Target_List := Priv_Decls; | |
454 | ||
455 | elsif not Present (Vis_Decls) then | |
456 | Target_List := New_List; | |
457 | Set_Private_Declarations (Spec, Target_List); | |
458 | else | |
459 | Target_List := Vis_Decls; | |
460 | end if; | |
461 | ||
462 | Build_Package_Dispatch_Tables (N); | |
463 | end; | |
464 | ||
465 | else pragma Assert (Nkind (N) = N_Package_Body); | |
466 | Target_List := Declarations (N); | |
467 | Build_Dispatch_Tables (Target_List); | |
468 | end if; | |
469 | end Build_Static_Dispatch_Tables; | |
470 | ||
f235fede | 471 | ------------------------------ |
472 | -- Convert_Tag_To_Interface -- | |
473 | ------------------------------ | |
474 | ||
475 | function Convert_Tag_To_Interface | |
476 | (Typ : Entity_Id; | |
477 | Expr : Node_Id) return Node_Id | |
478 | is | |
479 | Loc : constant Source_Ptr := Sloc (Expr); | |
480 | Anon_Type : Entity_Id; | |
481 | Result : Node_Id; | |
482 | ||
483 | begin | |
484 | pragma Assert (Is_Class_Wide_Type (Typ) | |
485 | and then Is_Interface (Typ) | |
486 | and then | |
487 | ((Nkind (Expr) = N_Selected_Component | |
4c58ddd7 | 488 | and then Is_Tag (Entity (Selector_Name (Expr)))) |
f235fede | 489 | or else |
490 | (Nkind (Expr) = N_Function_Call | |
4c58ddd7 | 491 | and then RTE_Available (RE_Displace) |
492 | and then Entity (Name (Expr)) = RTE (RE_Displace)))); | |
f235fede | 493 | |
494 | Anon_Type := Create_Itype (E_Anonymous_Access_Type, Expr); | |
495 | Set_Directly_Designated_Type (Anon_Type, Typ); | |
496 | Set_Etype (Anon_Type, Anon_Type); | |
497 | Set_Can_Never_Be_Null (Anon_Type); | |
498 | ||
499 | -- Decorate the size and alignment attributes of the anonymous access | |
500 | -- type, as required by gigi. | |
501 | ||
502 | Layout_Type (Anon_Type); | |
503 | ||
504 | if Nkind (Expr) = N_Selected_Component | |
505 | and then Is_Tag (Entity (Selector_Name (Expr))) | |
506 | then | |
507 | Result := | |
508 | Make_Explicit_Dereference (Loc, | |
509 | Unchecked_Convert_To (Anon_Type, | |
510 | Make_Attribute_Reference (Loc, | |
511 | Prefix => Expr, | |
512 | Attribute_Name => Name_Address))); | |
513 | else | |
514 | Result := | |
515 | Make_Explicit_Dereference (Loc, | |
516 | Unchecked_Convert_To (Anon_Type, Expr)); | |
517 | end if; | |
518 | ||
519 | return Result; | |
520 | end Convert_Tag_To_Interface; | |
521 | ||
d00681a7 | 522 | ------------------- |
523 | -- CPP_Num_Prims -- | |
524 | ------------------- | |
525 | ||
526 | function CPP_Num_Prims (Typ : Entity_Id) return Nat is | |
527 | CPP_Typ : Entity_Id; | |
528 | Tag_Comp : Entity_Id; | |
529 | ||
530 | begin | |
531 | if not Is_Tagged_Type (Typ) | |
532 | or else not Is_CPP_Class (Root_Type (Typ)) | |
533 | then | |
534 | return 0; | |
535 | ||
536 | else | |
537 | CPP_Typ := Enclosing_CPP_Parent (Typ); | |
538 | Tag_Comp := First_Tag_Component (CPP_Typ); | |
539 | ||
540 | -- If the number of primitives is already set in the tag component | |
541 | -- then use it | |
542 | ||
543 | if Present (Tag_Comp) | |
544 | and then DT_Entry_Count (Tag_Comp) /= No_Uint | |
545 | then | |
546 | return UI_To_Int (DT_Entry_Count (Tag_Comp)); | |
547 | ||
548 | -- Otherwise, count the primitives of the enclosing CPP type | |
549 | ||
550 | else | |
551 | declare | |
552 | Count : Nat := 0; | |
553 | Elmt : Elmt_Id; | |
554 | ||
555 | begin | |
556 | Elmt := First_Elmt (Primitive_Operations (CPP_Typ)); | |
557 | while Present (Elmt) loop | |
558 | Count := Count + 1; | |
559 | Next_Elmt (Elmt); | |
560 | end loop; | |
561 | ||
562 | return Count; | |
563 | end; | |
564 | end if; | |
565 | end if; | |
566 | end CPP_Num_Prims; | |
567 | ||
aad6babd | 568 | ------------------------------ |
569 | -- Default_Prim_Op_Position -- | |
570 | ------------------------------ | |
571 | ||
68f95949 | 572 | function Default_Prim_Op_Position (E : Entity_Id) return Uint is |
aad6babd | 573 | TSS_Name : TSS_Name_Type; |
aad6babd | 574 | |
575 | begin | |
aad6babd | 576 | Get_Name_String (Chars (E)); |
577 | TSS_Name := | |
578 | TSS_Name_Type | |
579 | (Name_Buffer (Name_Len - TSS_Name'Length + 1 .. Name_Len)); | |
580 | ||
581 | if Chars (E) = Name_uSize then | |
582 | return Uint_1; | |
583 | ||
aad6babd | 584 | elsif TSS_Name = TSS_Stream_Read then |
208fd589 | 585 | return Uint_2; |
aad6babd | 586 | |
587 | elsif TSS_Name = TSS_Stream_Write then | |
208fd589 | 588 | return Uint_3; |
aad6babd | 589 | |
590 | elsif TSS_Name = TSS_Stream_Input then | |
208fd589 | 591 | return Uint_4; |
aad6babd | 592 | |
593 | elsif TSS_Name = TSS_Stream_Output then | |
208fd589 | 594 | return Uint_5; |
aad6babd | 595 | |
596 | elsif Chars (E) = Name_Op_Eq then | |
208fd589 | 597 | return Uint_6; |
aad6babd | 598 | |
599 | elsif Chars (E) = Name_uAssign then | |
208fd589 | 600 | return Uint_7; |
aad6babd | 601 | |
602 | elsif TSS_Name = TSS_Deep_Adjust then | |
208fd589 | 603 | return Uint_8; |
aad6babd | 604 | |
605 | elsif TSS_Name = TSS_Deep_Finalize then | |
208fd589 | 606 | return Uint_9; |
aad6babd | 607 | |
6cb4b973 | 608 | -- In VM targets unconditionally allow obtaining the position associated |
609 | -- with predefined interface primitives since in these platforms any | |
610 | -- tagged type has these primitives. | |
611 | ||
612 | elsif Ada_Version >= Ada_2005 or else not Tagged_Type_Expansion then | |
76a1c25b | 613 | if Chars (E) = Name_uDisp_Asynchronous_Select then |
208fd589 | 614 | return Uint_10; |
d62940bf | 615 | |
76a1c25b | 616 | elsif Chars (E) = Name_uDisp_Conditional_Select then |
208fd589 | 617 | return Uint_11; |
d62940bf | 618 | |
76a1c25b | 619 | elsif Chars (E) = Name_uDisp_Get_Prim_Op_Kind then |
208fd589 | 620 | return Uint_12; |
d62940bf | 621 | |
76a1c25b | 622 | elsif Chars (E) = Name_uDisp_Get_Task_Id then |
208fd589 | 623 | return Uint_13; |
d62940bf | 624 | |
cdb1c38f | 625 | elsif Chars (E) = Name_uDisp_Requeue then |
208fd589 | 626 | return Uint_14; |
cdb1c38f | 627 | |
628 | elsif Chars (E) = Name_uDisp_Timed_Select then | |
208fd589 | 629 | return Uint_15; |
76a1c25b | 630 | end if; |
aad6babd | 631 | end if; |
76a1c25b | 632 | |
633 | raise Program_Error; | |
aad6babd | 634 | end Default_Prim_Op_Position; |
635 | ||
7189d17f | 636 | ----------------------------- |
637 | -- Expand_Dispatching_Call -- | |
638 | ----------------------------- | |
ee6ba406 | 639 | |
7189d17f | 640 | procedure Expand_Dispatching_Call (Call_Node : Node_Id) is |
ee6ba406 | 641 | Loc : constant Source_Ptr := Sloc (Call_Node); |
642 | Call_Typ : constant Entity_Id := Etype (Call_Node); | |
643 | ||
2ea346ac | 644 | Ctrl_Arg : constant Node_Id := Controlling_Argument (Call_Node); |
645 | Ctrl_Typ : constant Entity_Id := Base_Type (Etype (Ctrl_Arg)); | |
646 | Param_List : constant List_Id := Parameter_Associations (Call_Node); | |
ee6ba406 | 647 | |
af647dc7 | 648 | Subp : Entity_Id; |
7189d17f | 649 | CW_Typ : Entity_Id; |
650 | New_Call : Node_Id; | |
651 | New_Call_Name : Node_Id; | |
652 | New_Params : List_Id := No_List; | |
653 | Param : Node_Id; | |
654 | Res_Typ : Entity_Id; | |
655 | Subp_Ptr_Typ : Entity_Id; | |
656 | Subp_Typ : Entity_Id; | |
657 | Typ : Entity_Id; | |
658 | Eq_Prim_Op : Entity_Id := Empty; | |
659 | Controlling_Tag : Node_Id; | |
ee6ba406 | 660 | |
661 | function New_Value (From : Node_Id) return Node_Id; | |
9dfe12ae | 662 | -- From is the original Expression. New_Value is equivalent to a call |
663 | -- to Duplicate_Subexpr with an explicit dereference when From is an | |
7189d17f | 664 | -- access parameter. |
665 | ||
9dfe12ae | 666 | --------------- |
667 | -- New_Value -- | |
668 | --------------- | |
669 | ||
ee6ba406 | 670 | function New_Value (From : Node_Id) return Node_Id is |
671 | Res : constant Node_Id := Duplicate_Subexpr (From); | |
ee6ba406 | 672 | begin |
673 | if Is_Access_Type (Etype (From)) then | |
af647dc7 | 674 | return |
675 | Make_Explicit_Dereference (Sloc (From), | |
676 | Prefix => Res); | |
ee6ba406 | 677 | else |
678 | return Res; | |
679 | end if; | |
680 | end New_Value; | |
681 | ||
d215f619 | 682 | -- Local variables |
683 | ||
5a44b136 | 684 | New_Node : Node_Id; |
685 | SCIL_Node : Node_Id; | |
686 | SCIL_Related_Node : Node_Id := Call_Node; | |
d215f619 | 687 | |
7189d17f | 688 | -- Start of processing for Expand_Dispatching_Call |
ee6ba406 | 689 | |
690 | begin | |
725a69d2 | 691 | if No_Run_Time_Mode then |
692 | Error_Msg_CRT ("tagged types", Call_Node); | |
693 | return; | |
694 | end if; | |
695 | ||
343d35dc | 696 | -- Expand_Dispatching_Call is called directly from the semantics, |
0f3b1f49 | 697 | -- so we only proceed if the expander is active. |
343d35dc | 698 | |
b6242b97 | 699 | if not Full_Expander_Active |
0f3b1f49 | 700 | |
701 | -- And there is no need to expand the call if we are compiling under | |
702 | -- restriction No_Dispatching_Calls; the semantic analyzer has | |
703 | -- previously notified the violation of this restriction. | |
704 | ||
343d35dc | 705 | or else Restriction_Active (No_Dispatching_Calls) |
706 | then | |
707 | return; | |
708 | end if; | |
68f95949 | 709 | |
af647dc7 | 710 | -- Set subprogram. If this is an inherited operation that was |
711 | -- overridden, the body that is being called is its alias. | |
712 | ||
713 | Subp := Entity (Name (Call_Node)); | |
ee6ba406 | 714 | |
715 | if Present (Alias (Subp)) | |
716 | and then Is_Inherited_Operation (Subp) | |
717 | and then No (DTC_Entity (Subp)) | |
718 | then | |
719 | Subp := Alias (Subp); | |
720 | end if; | |
721 | ||
7189d17f | 722 | -- Definition of the class-wide type and the tagged type |
ee6ba406 | 723 | |
7189d17f | 724 | -- If the controlling argument is itself a tag rather than a tagged |
725 | -- object, then use the class-wide type associated with the subprogram's | |
726 | -- controlling type. This case can occur when a call to an inherited | |
727 | -- primitive has an actual that originated from a default parameter | |
728 | -- given by a tag-indeterminate call and when there is no other | |
729 | -- controlling argument providing the tag (AI-239 requires dispatching). | |
730 | -- This capability of dispatching directly by tag is also needed by the | |
731 | -- implementation of AI-260 (for the generic dispatching constructors). | |
732 | ||
2ea346ac | 733 | if Ctrl_Typ = RTE (RE_Tag) |
68f95949 | 734 | or else (RTE_Available (RE_Interface_Tag) |
2ea346ac | 735 | and then Ctrl_Typ = RTE (RE_Interface_Tag)) |
aad6babd | 736 | then |
af647dc7 | 737 | CW_Typ := Class_Wide_Type (Find_Dispatching_Type (Subp)); |
7189d17f | 738 | |
725a69d2 | 739 | -- Class_Wide_Type is applied to the expressions used to initialize |
740 | -- CW_Typ, to ensure that CW_Typ always denotes a class-wide type, since | |
741 | -- there are cases where the controlling type is resolved to a specific | |
742 | -- type (such as for designated types of arguments such as CW'Access). | |
743 | ||
2ea346ac | 744 | elsif Is_Access_Type (Ctrl_Typ) then |
745 | CW_Typ := Class_Wide_Type (Designated_Type (Ctrl_Typ)); | |
7189d17f | 746 | |
ee6ba406 | 747 | else |
2ea346ac | 748 | CW_Typ := Class_Wide_Type (Ctrl_Typ); |
ee6ba406 | 749 | end if; |
750 | ||
bb5dfacc | 751 | Typ := Find_Specific_Type (CW_Typ); |
d62940bf | 752 | |
ee6ba406 | 753 | if not Is_Limited_Type (Typ) then |
754 | Eq_Prim_Op := Find_Prim_Op (Typ, Name_Op_Eq); | |
755 | end if; | |
756 | ||
343d35dc | 757 | -- Dispatching call to C++ primitive. Create a new parameter list |
758 | -- with no tag checks. | |
ee6ba406 | 759 | |
cd534f03 | 760 | New_Params := New_List; |
761 | ||
343d35dc | 762 | if Is_CPP_Class (Typ) then |
ee6ba406 | 763 | Param := First_Actual (Call_Node); |
764 | while Present (Param) loop | |
aad6babd | 765 | Append_To (New_Params, Relocate_Node (Param)); |
ee6ba406 | 766 | Next_Actual (Param); |
767 | end loop; | |
768 | ||
343d35dc | 769 | -- Dispatching call to Ada primitive |
770 | ||
ee6ba406 | 771 | elsif Present (Param_List) then |
cd534f03 | 772 | Apply_Tag_Checks (Call_Node); |
ee6ba406 | 773 | |
ee6ba406 | 774 | Param := First_Actual (Call_Node); |
775 | while Present (Param) loop | |
cd534f03 | 776 | -- Cases in which we may have generated runtime checks |
ee6ba406 | 777 | |
cd534f03 | 778 | if Param = Ctrl_Arg |
779 | or else Subp = Eq_Prim_Op | |
780 | then | |
9dfe12ae | 781 | Append_To (New_Params, |
782 | Duplicate_Subexpr_Move_Checks (Param)); | |
ee6ba406 | 783 | |
0429d533 | 784 | elsif Nkind (Parent (Param)) /= N_Parameter_Association |
785 | or else not Is_Accessibility_Actual (Parent (Param)) | |
786 | then | |
ee6ba406 | 787 | Append_To (New_Params, Relocate_Node (Param)); |
788 | end if; | |
789 | ||
790 | Next_Actual (Param); | |
791 | end loop; | |
792 | end if; | |
793 | ||
794 | -- Generate the appropriate subprogram pointer type | |
795 | ||
68f95949 | 796 | if Etype (Subp) = Typ then |
ee6ba406 | 797 | Res_Typ := CW_Typ; |
798 | else | |
7189d17f | 799 | Res_Typ := Etype (Subp); |
ee6ba406 | 800 | end if; |
801 | ||
b6b96867 | 802 | Subp_Typ := Create_Itype (E_Subprogram_Type, Call_Node); |
ee6ba406 | 803 | Subp_Ptr_Typ := Create_Itype (E_Access_Subprogram_Type, Call_Node); |
804 | Set_Etype (Subp_Typ, Res_Typ); | |
ee6ba406 | 805 | Set_Returns_By_Ref (Subp_Typ, Returns_By_Ref (Subp)); |
265200d0 | 806 | Set_Convention (Subp_Typ, Convention (Subp)); |
807 | ||
808 | -- Notify gigi that the designated type is a dispatching primitive | |
809 | ||
810 | Set_Is_Dispatch_Table_Entity (Subp_Typ); | |
ee6ba406 | 811 | |
812 | -- Create a new list of parameters which is a copy of the old formal | |
813 | -- list including the creation of a new set of matching entities. | |
814 | ||
815 | declare | |
816 | Old_Formal : Entity_Id := First_Formal (Subp); | |
817 | New_Formal : Entity_Id; | |
725a69d2 | 818 | Extra : Entity_Id := Empty; |
ee6ba406 | 819 | |
820 | begin | |
821 | if Present (Old_Formal) then | |
822 | New_Formal := New_Copy (Old_Formal); | |
823 | Set_First_Entity (Subp_Typ, New_Formal); | |
824 | Param := First_Actual (Call_Node); | |
825 | ||
826 | loop | |
827 | Set_Scope (New_Formal, Subp_Typ); | |
828 | ||
829 | -- Change all the controlling argument types to be class-wide | |
7189d17f | 830 | -- to avoid a recursion in dispatching. |
ee6ba406 | 831 | |
7189d17f | 832 | if Is_Controlling_Formal (New_Formal) then |
ee6ba406 | 833 | Set_Etype (New_Formal, Etype (Param)); |
834 | end if; | |
835 | ||
cc60bd16 | 836 | -- If the type of the formal is an itype, there was code here |
837 | -- introduced in 1998 in revision 1.46, to create a new itype | |
838 | -- by copy. This seems useless, and in fact leads to semantic | |
839 | -- errors when the itype is the completion of a type derived | |
840 | -- from a private type. | |
ee6ba406 | 841 | |
842 | Extra := New_Formal; | |
843 | Next_Formal (Old_Formal); | |
844 | exit when No (Old_Formal); | |
845 | ||
846 | Set_Next_Entity (New_Formal, New_Copy (Old_Formal)); | |
847 | Next_Entity (New_Formal); | |
848 | Next_Actual (Param); | |
849 | end loop; | |
af647dc7 | 850 | |
851 | Set_Next_Entity (New_Formal, Empty); | |
ee6ba406 | 852 | Set_Last_Entity (Subp_Typ, Extra); |
725a69d2 | 853 | end if; |
ee6ba406 | 854 | |
725a69d2 | 855 | -- Now that the explicit formals have been duplicated, any extra |
856 | -- formals needed by the subprogram must be created. | |
ee6ba406 | 857 | |
725a69d2 | 858 | if Present (Extra) then |
859 | Set_Extra_Formal (Extra, Empty); | |
ee6ba406 | 860 | end if; |
725a69d2 | 861 | |
862 | Create_Extra_Formals (Subp_Typ); | |
ee6ba406 | 863 | end; |
864 | ||
b6b96867 | 865 | -- Complete description of pointer type, including size information, as |
866 | -- must be done with itypes to prevent order-of-elaboration anomalies | |
867 | -- in gigi. | |
868 | ||
ee6ba406 | 869 | Set_Etype (Subp_Ptr_Typ, Subp_Ptr_Typ); |
870 | Set_Directly_Designated_Type (Subp_Ptr_Typ, Subp_Typ); | |
acf97c11 | 871 | Set_Convention (Subp_Ptr_Typ, Convention (Subp_Typ)); |
b6b96867 | 872 | Layout_Type (Subp_Ptr_Typ); |
ee6ba406 | 873 | |
68f95949 | 874 | -- If the controlling argument is a value of type Ada.Tag or an abstract |
875 | -- interface class-wide type then use it directly. Otherwise, the tag | |
876 | -- must be extracted from the controlling object. | |
7189d17f | 877 | |
2ea346ac | 878 | if Ctrl_Typ = RTE (RE_Tag) |
68f95949 | 879 | or else (RTE_Available (RE_Interface_Tag) |
2ea346ac | 880 | and then Ctrl_Typ = RTE (RE_Interface_Tag)) |
68f95949 | 881 | then |
882 | Controlling_Tag := Duplicate_Subexpr (Ctrl_Arg); | |
883 | ||
343d35dc | 884 | -- Extract the tag from an unchecked type conversion. Done to avoid |
885 | -- the expansion of additional code just to obtain the value of such | |
886 | -- tag because the current management of interface type conversions | |
887 | -- generates in some cases this unchecked type conversion with the | |
888 | -- tag of the object (see Expand_Interface_Conversion). | |
889 | ||
890 | elsif Nkind (Ctrl_Arg) = N_Unchecked_Type_Conversion | |
891 | and then | |
892 | (Etype (Expression (Ctrl_Arg)) = RTE (RE_Tag) | |
893 | or else | |
894 | (RTE_Available (RE_Interface_Tag) | |
895 | and then | |
896 | Etype (Expression (Ctrl_Arg)) = RTE (RE_Interface_Tag))) | |
897 | then | |
898 | Controlling_Tag := Duplicate_Subexpr (Expression (Ctrl_Arg)); | |
899 | ||
68f95949 | 900 | -- Ada 2005 (AI-251): Abstract interface class-wide type |
901 | ||
2ea346ac | 902 | elsif Is_Interface (Ctrl_Typ) |
903 | and then Is_Class_Wide_Type (Ctrl_Typ) | |
aad6babd | 904 | then |
7189d17f | 905 | Controlling_Tag := Duplicate_Subexpr (Ctrl_Arg); |
906 | ||
907 | else | |
908 | Controlling_Tag := | |
909 | Make_Selected_Component (Loc, | |
1ea4332a | 910 | Prefix => Duplicate_Subexpr_Move_Checks (Ctrl_Arg), |
7189d17f | 911 | Selector_Name => New_Reference_To (DTC_Entity (Subp), Loc)); |
912 | end if; | |
913 | ||
1ea4332a | 914 | -- Handle dispatching calls to predefined primitives |
ee6ba406 | 915 | |
af647dc7 | 916 | if Is_Predefined_Dispatching_Operation (Subp) |
917 | or else Is_Predefined_Dispatching_Alias (Subp) | |
918 | then | |
ef40be71 | 919 | Build_Get_Predefined_Prim_Op_Address (Loc, |
920 | Tag_Node => Controlling_Tag, | |
921 | Position => DT_Position (Subp), | |
922 | New_Node => New_Node); | |
ee6ba406 | 923 | |
343d35dc | 924 | -- Handle dispatching calls to user-defined primitives |
68f95949 | 925 | |
926 | else | |
ef40be71 | 927 | Build_Get_Prim_Op_Address (Loc, |
23197014 | 928 | Typ => Underlying_Type (Find_Dispatching_Type (Subp)), |
ef40be71 | 929 | Tag_Node => Controlling_Tag, |
930 | Position => DT_Position (Subp), | |
931 | New_Node => New_Node); | |
68f95949 | 932 | end if; |
ee6ba406 | 933 | |
ef40be71 | 934 | New_Call_Name := |
935 | Unchecked_Convert_To (Subp_Ptr_Typ, New_Node); | |
936 | ||
5a44b136 | 937 | -- Generate the SCIL node for this dispatching call. Done now because |
938 | -- attribute SCIL_Controlling_Tag must be set after the new call name | |
939 | -- is built to reference the nodes that will see the SCIL backend | |
940 | -- (because Build_Get_Prim_Op_Address generates an unchecked type | |
941 | -- conversion which relocates the controlling tag node). | |
ee6ba406 | 942 | |
ef40be71 | 943 | if Generate_SCIL then |
5a44b136 | 944 | SCIL_Node := Make_SCIL_Dispatching_Call (Sloc (Call_Node)); |
945 | Set_SCIL_Entity (SCIL_Node, Typ); | |
946 | Set_SCIL_Target_Prim (SCIL_Node, Subp); | |
ef40be71 | 947 | |
948 | -- Common case: the controlling tag is the tag of an object | |
949 | -- (for example, obj.tag) | |
950 | ||
951 | if Nkind (Controlling_Tag) = N_Selected_Component then | |
952 | Set_SCIL_Controlling_Tag (SCIL_Node, Controlling_Tag); | |
953 | ||
954 | -- Handle renaming of selected component | |
955 | ||
956 | elsif Nkind (Controlling_Tag) = N_Identifier | |
1ea4332a | 957 | and then Nkind (Parent (Entity (Controlling_Tag))) = |
958 | N_Object_Renaming_Declaration | |
959 | and then Nkind (Name (Parent (Entity (Controlling_Tag)))) = | |
960 | N_Selected_Component | |
ef40be71 | 961 | then |
962 | Set_SCIL_Controlling_Tag (SCIL_Node, | |
963 | Name (Parent (Entity (Controlling_Tag)))); | |
964 | ||
965 | -- If the controlling tag is an identifier, the SCIL node references | |
966 | -- the corresponding object or parameter declaration | |
967 | ||
968 | elsif Nkind (Controlling_Tag) = N_Identifier | |
969 | and then Nkind_In (Parent (Entity (Controlling_Tag)), | |
1ea4332a | 970 | N_Object_Declaration, |
971 | N_Parameter_Specification) | |
ef40be71 | 972 | then |
973 | Set_SCIL_Controlling_Tag (SCIL_Node, | |
974 | Parent (Entity (Controlling_Tag))); | |
975 | ||
976 | -- If the controlling tag is a dereference, the SCIL node references | |
977 | -- the corresponding object or parameter declaration | |
978 | ||
979 | elsif Nkind (Controlling_Tag) = N_Explicit_Dereference | |
980 | and then Nkind (Prefix (Controlling_Tag)) = N_Identifier | |
981 | and then Nkind_In (Parent (Entity (Prefix (Controlling_Tag))), | |
1ea4332a | 982 | N_Object_Declaration, |
983 | N_Parameter_Specification) | |
ef40be71 | 984 | then |
985 | Set_SCIL_Controlling_Tag (SCIL_Node, | |
986 | Parent (Entity (Prefix (Controlling_Tag)))); | |
987 | ||
988 | -- For a direct reference of the tag of the type the SCIL node | |
6fb3c314 | 989 | -- references the internal object declaration containing the tag |
ef40be71 | 990 | -- of the type. |
991 | ||
992 | elsif Nkind (Controlling_Tag) = N_Attribute_Reference | |
993 | and then Attribute_Name (Controlling_Tag) = Name_Tag | |
994 | then | |
995 | Set_SCIL_Controlling_Tag (SCIL_Node, | |
996 | Parent | |
1ea4332a | 997 | (Node |
998 | (First_Elmt | |
999 | (Access_Disp_Table (Entity (Prefix (Controlling_Tag))))))); | |
ef40be71 | 1000 | |
1001 | -- Interfaces are not supported. For now we leave the SCIL node | |
1002 | -- decorated with the Controlling_Tag. More work needed here??? | |
1003 | ||
1004 | elsif Is_Interface (Etype (Controlling_Tag)) then | |
1005 | Set_SCIL_Controlling_Tag (SCIL_Node, Controlling_Tag); | |
1006 | ||
1007 | else | |
1008 | pragma Assert (False); | |
1009 | null; | |
1010 | end if; | |
1011 | end if; | |
1012 | ||
1013 | if Nkind (Call_Node) = N_Function_Call then | |
725a69d2 | 1014 | New_Call := |
1015 | Make_Function_Call (Loc, | |
1ea4332a | 1016 | Name => New_Call_Name, |
725a69d2 | 1017 | Parameter_Associations => New_Params); |
ee6ba406 | 1018 | |
725a69d2 | 1019 | -- If this is a dispatching "=", we must first compare the tags so |
1020 | -- we generate: x.tag = y.tag and then x = y | |
ee6ba406 | 1021 | |
725a69d2 | 1022 | if Subp = Eq_Prim_Op then |
1023 | Param := First_Actual (Call_Node); | |
aad6babd | 1024 | New_Call := |
725a69d2 | 1025 | Make_And_Then (Loc, |
1026 | Left_Opnd => | |
1027 | Make_Op_Eq (Loc, | |
1028 | Left_Opnd => | |
1029 | Make_Selected_Component (Loc, | |
1ea4332a | 1030 | Prefix => New_Value (Param), |
725a69d2 | 1031 | Selector_Name => |
1032 | New_Reference_To (First_Tag_Component (Typ), | |
1033 | Loc)), | |
ee6ba406 | 1034 | |
725a69d2 | 1035 | Right_Opnd => |
1036 | Make_Selected_Component (Loc, | |
1ea4332a | 1037 | Prefix => |
725a69d2 | 1038 | Unchecked_Convert_To (Typ, |
1039 | New_Value (Next_Actual (Param))), | |
1040 | Selector_Name => | |
1ea4332a | 1041 | New_Reference_To |
1042 | (First_Tag_Component (Typ), Loc))), | |
725a69d2 | 1043 | Right_Opnd => New_Call); |
5a44b136 | 1044 | |
1045 | SCIL_Related_Node := Right_Opnd (New_Call); | |
ee6ba406 | 1046 | end if; |
1047 | ||
1048 | else | |
1049 | New_Call := | |
1050 | Make_Procedure_Call_Statement (Loc, | |
1ea4332a | 1051 | Name => New_Call_Name, |
ee6ba406 | 1052 | Parameter_Associations => New_Params); |
1053 | end if; | |
1054 | ||
e00e091c | 1055 | -- Register the dispatching call in the call graph nodes table |
1056 | ||
1057 | Register_CG_Node (Call_Node); | |
1058 | ||
ee6ba406 | 1059 | Rewrite (Call_Node, New_Call); |
725a69d2 | 1060 | |
5a44b136 | 1061 | -- Associate the SCIL node of this dispatching call |
1062 | ||
1063 | if Generate_SCIL then | |
1064 | Set_SCIL_Node (SCIL_Related_Node, SCIL_Node); | |
1065 | end if; | |
1066 | ||
725a69d2 | 1067 | -- Suppress all checks during the analysis of the expanded code |
36b938a3 | 1068 | -- to avoid the generation of spurious warnings under ZFP run-time. |
725a69d2 | 1069 | |
1070 | Analyze_And_Resolve (Call_Node, Call_Typ, Suppress => All_Checks); | |
7189d17f | 1071 | end Expand_Dispatching_Call; |
ee6ba406 | 1072 | |
aad6babd | 1073 | --------------------------------- |
1074 | -- Expand_Interface_Conversion -- | |
1075 | --------------------------------- | |
1076 | ||
952af0b9 | 1077 | procedure Expand_Interface_Conversion |
1078 | (N : Node_Id; | |
1079 | Is_Static : Boolean := True) | |
1080 | is | |
aad6babd | 1081 | Loc : constant Source_Ptr := Sloc (N); |
af647dc7 | 1082 | Etyp : constant Entity_Id := Etype (N); |
aad6babd | 1083 | Operand : constant Node_Id := Expression (N); |
1084 | Operand_Typ : Entity_Id := Etype (Operand); | |
d62940bf | 1085 | Func : Node_Id; |
af647dc7 | 1086 | Iface_Typ : Entity_Id := Etype (N); |
1087 | Iface_Tag : Entity_Id; | |
aad6babd | 1088 | |
1089 | begin | |
343d35dc | 1090 | -- Ada 2005 (AI-345): Handle synchronized interface type derivations |
aad6babd | 1091 | |
343d35dc | 1092 | if Is_Concurrent_Type (Operand_Typ) then |
1093 | Operand_Typ := Base_Type (Corresponding_Record_Type (Operand_Typ)); | |
aad6babd | 1094 | end if; |
1095 | ||
e7e688dd | 1096 | -- Handle access to class-wide interface types |
aad6babd | 1097 | |
d62940bf | 1098 | if Is_Access_Type (Iface_Typ) then |
1099 | Iface_Typ := Etype (Directly_Designated_Type (Iface_Typ)); | |
aad6babd | 1100 | end if; |
1101 | ||
d62940bf | 1102 | -- Handle class-wide interface types. This conversion can appear |
1103 | -- explicitly in the source code. Example: I'Class (Obj) | |
aad6babd | 1104 | |
d62940bf | 1105 | if Is_Class_Wide_Type (Iface_Typ) then |
725a69d2 | 1106 | Iface_Typ := Root_Type (Iface_Typ); |
d62940bf | 1107 | end if; |
1108 | ||
79a72728 | 1109 | -- If the target type is a tagged synchronized type, the dispatch table |
bf3e1520 | 1110 | -- info is in the corresponding record type. |
79a72728 | 1111 | |
1112 | if Is_Concurrent_Type (Iface_Typ) then | |
1113 | Iface_Typ := Corresponding_Record_Type (Iface_Typ); | |
1114 | end if; | |
1115 | ||
23197014 | 1116 | -- Handle private types |
1117 | ||
1118 | Iface_Typ := Underlying_Type (Iface_Typ); | |
1119 | ||
a17cc77d | 1120 | -- Freeze the entity associated with the target interface to have |
1121 | -- available the attribute Access_Disp_Table. | |
1122 | ||
1123 | Freeze_Before (N, Iface_Typ); | |
1124 | ||
af647dc7 | 1125 | pragma Assert (not Is_Static |
1126 | or else (not Is_Class_Wide_Type (Iface_Typ) | |
1127 | and then Is_Interface (Iface_Typ))); | |
aad6babd | 1128 | |
662256db | 1129 | if not Tagged_Type_Expansion then |
79500ea0 | 1130 | if VM_Target /= No_VM then |
1131 | if Is_Access_Type (Operand_Typ) then | |
1132 | Operand_Typ := Designated_Type (Operand_Typ); | |
1133 | end if; | |
725a69d2 | 1134 | |
79500ea0 | 1135 | if Is_Class_Wide_Type (Operand_Typ) then |
1136 | Operand_Typ := Root_Type (Operand_Typ); | |
1137 | end if; | |
1138 | ||
1139 | if not Is_Static | |
1140 | and then Operand_Typ /= Iface_Typ | |
1141 | then | |
1142 | Insert_Action (N, | |
1143 | Make_Procedure_Call_Statement (Loc, | |
1144 | Name => New_Occurrence_Of | |
1145 | (RTE (RE_Check_Interface_Conversion), Loc), | |
1146 | Parameter_Associations => New_List ( | |
1147 | Make_Attribute_Reference (Loc, | |
1148 | Prefix => Duplicate_Subexpr (Expression (N)), | |
1149 | Attribute_Name => Name_Tag), | |
1150 | Make_Attribute_Reference (Loc, | |
1151 | Prefix => New_Reference_To (Iface_Typ, Loc), | |
1152 | Attribute_Name => Name_Tag)))); | |
1153 | end if; | |
1154 | ||
1155 | -- Just do a conversion ??? | |
1156 | ||
1157 | Rewrite (N, Unchecked_Convert_To (Etype (N), N)); | |
1158 | Analyze (N); | |
1159 | end if; | |
725a69d2 | 1160 | |
725a69d2 | 1161 | return; |
1162 | end if; | |
1163 | ||
952af0b9 | 1164 | if not Is_Static then |
68f95949 | 1165 | |
1166 | -- Give error if configurable run time and Displace not available | |
1167 | ||
1168 | if not RTE_Available (RE_Displace) then | |
cc60bd16 | 1169 | Error_Msg_CRT ("dynamic interface conversion", N); |
68f95949 | 1170 | return; |
1171 | end if; | |
1172 | ||
725a69d2 | 1173 | -- Handle conversion of access-to-class-wide interface types. Target |
1174 | -- can be an access to an object or an access to another class-wide | |
1175 | -- interface (see -1- and -2- in the following example): | |
af647dc7 | 1176 | |
1177 | -- type Iface1_Ref is access all Iface1'Class; | |
1178 | -- type Iface2_Ref is access all Iface1'Class; | |
1179 | ||
1180 | -- Acc1 : Iface1_Ref := new ... | |
1181 | -- Obj : Obj_Ref := Obj_Ref (Acc); -- 1 | |
1182 | -- Acc2 : Iface2_Ref := Iface2_Ref (Acc); -- 2 | |
1183 | ||
1184 | if Is_Access_Type (Operand_Typ) then | |
af647dc7 | 1185 | Rewrite (N, |
1186 | Unchecked_Convert_To (Etype (N), | |
1187 | Make_Function_Call (Loc, | |
1188 | Name => New_Reference_To (RTE (RE_Displace), Loc), | |
1189 | Parameter_Associations => New_List ( | |
1190 | ||
1191 | Unchecked_Convert_To (RTE (RE_Address), | |
1192 | Relocate_Node (Expression (N))), | |
1193 | ||
1194 | New_Occurrence_Of | |
1195 | (Node (First_Elmt (Access_Disp_Table (Iface_Typ))), | |
1196 | Loc))))); | |
1197 | ||
1198 | Analyze (N); | |
1199 | return; | |
1200 | end if; | |
1201 | ||
952af0b9 | 1202 | Rewrite (N, |
1203 | Make_Function_Call (Loc, | |
1204 | Name => New_Reference_To (RTE (RE_Displace), Loc), | |
1205 | Parameter_Associations => New_List ( | |
1206 | Make_Attribute_Reference (Loc, | |
1207 | Prefix => Relocate_Node (Expression (N)), | |
1208 | Attribute_Name => Name_Address), | |
af647dc7 | 1209 | |
952af0b9 | 1210 | New_Occurrence_Of |
1211 | (Node (First_Elmt (Access_Disp_Table (Iface_Typ))), | |
1212 | Loc)))); | |
1213 | ||
1214 | Analyze (N); | |
1215 | ||
af647dc7 | 1216 | -- If the target is a class-wide interface we change the type of the |
1217 | -- data returned by IW_Convert to indicate that this is a dispatching | |
1218 | -- call. | |
952af0b9 | 1219 | |
17e14451 | 1220 | declare |
1221 | New_Itype : Entity_Id; | |
952af0b9 | 1222 | |
17e14451 | 1223 | begin |
1224 | New_Itype := Create_Itype (E_Anonymous_Access_Type, N); | |
cc60bd16 | 1225 | Set_Etype (New_Itype, New_Itype); |
17e14451 | 1226 | Set_Directly_Designated_Type (New_Itype, Etyp); |
952af0b9 | 1227 | |
17e14451 | 1228 | Rewrite (N, |
1229 | Make_Explicit_Dereference (Loc, | |
1230 | Prefix => | |
1231 | Unchecked_Convert_To (New_Itype, Relocate_Node (N)))); | |
1232 | Analyze (N); | |
1233 | Freeze_Itype (New_Itype, N); | |
1234 | ||
1235 | return; | |
1236 | end; | |
952af0b9 | 1237 | end if; |
1238 | ||
d62940bf | 1239 | Iface_Tag := Find_Interface_Tag (Operand_Typ, Iface_Typ); |
aad6babd | 1240 | pragma Assert (Iface_Tag /= Empty); |
1241 | ||
d62940bf | 1242 | -- Keep separate access types to interfaces because one internal |
f235fede | 1243 | -- function is used to handle the null value (see following comments) |
d62940bf | 1244 | |
1245 | if not Is_Access_Type (Etype (N)) then | |
f235fede | 1246 | |
1247 | -- Statically displace the pointer to the object to reference | |
1248 | -- the component containing the secondary dispatch table. | |
1249 | ||
d62940bf | 1250 | Rewrite (N, |
f235fede | 1251 | Convert_Tag_To_Interface (Class_Wide_Type (Iface_Typ), |
d62940bf | 1252 | Make_Selected_Component (Loc, |
1253 | Prefix => Relocate_Node (Expression (N)), | |
f235fede | 1254 | Selector_Name => New_Occurrence_Of (Iface_Tag, Loc)))); |
d62940bf | 1255 | |
1256 | else | |
1257 | -- Build internal function to handle the case in which the | |
1258 | -- actual is null. If the actual is null returns null because | |
1259 | -- no displacement is required; otherwise performs a type | |
1260 | -- conversion that will be expanded in the code that returns | |
1261 | -- the value of the displaced actual. That is: | |
1262 | ||
af647dc7 | 1263 | -- function Func (O : Address) return Iface_Typ is |
17e14451 | 1264 | -- type Op_Typ is access all Operand_Typ; |
1265 | -- Aux : Op_Typ := To_Op_Typ (O); | |
d62940bf | 1266 | -- begin |
af647dc7 | 1267 | -- if O = Null_Address then |
d62940bf | 1268 | -- return null; |
1269 | -- else | |
17e14451 | 1270 | -- return Iface_Typ!(Aux.Iface_Tag'Address); |
d62940bf | 1271 | -- end if; |
1272 | -- end Func; | |
1273 | ||
af647dc7 | 1274 | declare |
17e14451 | 1275 | Desig_Typ : Entity_Id; |
1276 | Fent : Entity_Id; | |
1277 | New_Typ_Decl : Node_Id; | |
17e14451 | 1278 | Stats : List_Id; |
1279 | ||
af647dc7 | 1280 | begin |
1281 | Desig_Typ := Etype (Expression (N)); | |
d62940bf | 1282 | |
af647dc7 | 1283 | if Is_Access_Type (Desig_Typ) then |
865909d3 | 1284 | Desig_Typ := |
1285 | Available_View (Directly_Designated_Type (Desig_Typ)); | |
af647dc7 | 1286 | end if; |
d62940bf | 1287 | |
e7e688dd | 1288 | if Is_Concurrent_Type (Desig_Typ) then |
1289 | Desig_Typ := Base_Type (Corresponding_Record_Type (Desig_Typ)); | |
1290 | end if; | |
1291 | ||
17e14451 | 1292 | New_Typ_Decl := |
1293 | Make_Full_Type_Declaration (Loc, | |
ec97ce79 | 1294 | Defining_Identifier => Make_Temporary (Loc, 'T'), |
17e14451 | 1295 | Type_Definition => |
1296 | Make_Access_To_Object_Definition (Loc, | |
1297 | All_Present => True, | |
1298 | Null_Exclusion_Present => False, | |
1299 | Constant_Present => False, | |
1300 | Subtype_Indication => | |
1301 | New_Reference_To (Desig_Typ, Loc))); | |
d62940bf | 1302 | |
725a69d2 | 1303 | Stats := New_List ( |
17e14451 | 1304 | Make_Simple_Return_Statement (Loc, |
1305 | Unchecked_Convert_To (Etype (N), | |
1306 | Make_Attribute_Reference (Loc, | |
1307 | Prefix => | |
1308 | Make_Selected_Component (Loc, | |
1309 | Prefix => | |
e7e688dd | 1310 | Unchecked_Convert_To |
1311 | (Defining_Identifier (New_Typ_Decl), | |
1312 | Make_Identifier (Loc, Name_uO)), | |
17e14451 | 1313 | Selector_Name => |
1314 | New_Occurrence_Of (Iface_Tag, Loc)), | |
1315 | Attribute_Name => Name_Address)))); | |
725a69d2 | 1316 | |
17e14451 | 1317 | -- If the type is null-excluding, no need for the null branch. |
1318 | -- Otherwise we need to check for it and return null. | |
1319 | ||
1320 | if not Can_Never_Be_Null (Etype (N)) then | |
1321 | Stats := New_List ( | |
1322 | Make_If_Statement (Loc, | |
1323 | Condition => | |
1324 | Make_Op_Eq (Loc, | |
1325 | Left_Opnd => Make_Identifier (Loc, Name_uO), | |
1326 | Right_Opnd => New_Reference_To | |
1327 | (RTE (RE_Null_Address), Loc)), | |
1328 | ||
1329 | Then_Statements => New_List ( | |
1330 | Make_Simple_Return_Statement (Loc, | |
1331 | Make_Null (Loc))), | |
1332 | Else_Statements => Stats)); | |
1333 | end if; | |
d62940bf | 1334 | |
ec97ce79 | 1335 | Fent := Make_Temporary (Loc, 'F'); |
17e14451 | 1336 | Func := |
1337 | Make_Subprogram_Body (Loc, | |
1338 | Specification => | |
1339 | Make_Function_Specification (Loc, | |
1340 | Defining_Unit_Name => Fent, | |
d62940bf | 1341 | |
17e14451 | 1342 | Parameter_Specifications => New_List ( |
1343 | Make_Parameter_Specification (Loc, | |
1344 | Defining_Identifier => | |
1345 | Make_Defining_Identifier (Loc, Name_uO), | |
1346 | Parameter_Type => | |
1347 | New_Reference_To (RTE (RE_Address), Loc))), | |
d62940bf | 1348 | |
17e14451 | 1349 | Result_Definition => |
1350 | New_Reference_To (Etype (N), Loc)), | |
d62940bf | 1351 | |
e7e688dd | 1352 | Declarations => New_List (New_Typ_Decl), |
d62940bf | 1353 | |
17e14451 | 1354 | Handled_Statement_Sequence => |
1355 | Make_Handled_Sequence_Of_Statements (Loc, Stats)); | |
d62940bf | 1356 | |
17e14451 | 1357 | -- Place function body before the expression containing the |
1358 | -- conversion. We suppress all checks because the body of the | |
1359 | -- internally generated function already takes care of the case | |
1360 | -- in which the actual is null; therefore there is no need to | |
1361 | -- double check that the pointer is not null when the program | |
1362 | -- executes the alternative that performs the type conversion). | |
af647dc7 | 1363 | |
17e14451 | 1364 | Insert_Action (N, Func, Suppress => All_Checks); |
af647dc7 | 1365 | |
17e14451 | 1366 | if Is_Access_Type (Etype (Expression (N))) then |
af647dc7 | 1367 | |
e7e688dd | 1368 | -- Generate: Func (Address!(Expression)) |
af647dc7 | 1369 | |
17e14451 | 1370 | Rewrite (N, |
1371 | Make_Function_Call (Loc, | |
1372 | Name => New_Reference_To (Fent, Loc), | |
1373 | Parameter_Associations => New_List ( | |
e7e688dd | 1374 | Unchecked_Convert_To (RTE (RE_Address), |
1375 | Relocate_Node (Expression (N)))))); | |
17e14451 | 1376 | |
1377 | else | |
e7e688dd | 1378 | -- Generate: Func (Operand_Typ!(Expression)'Address) |
17e14451 | 1379 | |
1380 | Rewrite (N, | |
1381 | Make_Function_Call (Loc, | |
1382 | Name => New_Reference_To (Fent, Loc), | |
1383 | Parameter_Associations => New_List ( | |
1384 | Make_Attribute_Reference (Loc, | |
1385 | Prefix => Unchecked_Convert_To (Operand_Typ, | |
1386 | Relocate_Node (Expression (N))), | |
1387 | Attribute_Name => Name_Address)))); | |
1388 | end if; | |
1389 | end; | |
d62940bf | 1390 | end if; |
aad6babd | 1391 | |
1392 | Analyze (N); | |
1393 | end Expand_Interface_Conversion; | |
1394 | ||
1395 | ------------------------------ | |
1396 | -- Expand_Interface_Actuals -- | |
1397 | ------------------------------ | |
1398 | ||
1399 | procedure Expand_Interface_Actuals (Call_Node : Node_Id) is | |
aad6babd | 1400 | Actual : Node_Id; |
d62940bf | 1401 | Actual_Dup : Node_Id; |
aad6babd | 1402 | Actual_Typ : Entity_Id; |
d62940bf | 1403 | Anon : Entity_Id; |
aad6babd | 1404 | Conversion : Node_Id; |
1405 | Formal : Entity_Id; | |
1406 | Formal_Typ : Entity_Id; | |
1407 | Subp : Entity_Id; | |
d62940bf | 1408 | Formal_DDT : Entity_Id; |
1409 | Actual_DDT : Entity_Id; | |
aad6babd | 1410 | |
1411 | begin | |
1412 | -- This subprogram is called directly from the semantics, so we need a | |
1413 | -- check to see whether expansion is active before proceeding. | |
1414 | ||
1415 | if not Expander_Active then | |
1416 | return; | |
1417 | end if; | |
1418 | ||
1419 | -- Call using access to subprogram with explicit dereference | |
1420 | ||
1421 | if Nkind (Name (Call_Node)) = N_Explicit_Dereference then | |
1422 | Subp := Etype (Name (Call_Node)); | |
1423 | ||
4e5db562 | 1424 | -- Call using selected component |
1425 | ||
1426 | elsif Nkind (Name (Call_Node)) = N_Selected_Component then | |
1427 | Subp := Entity (Selector_Name (Name (Call_Node))); | |
1428 | ||
1429 | -- Call using direct name | |
aad6babd | 1430 | |
1431 | else | |
1432 | Subp := Entity (Name (Call_Node)); | |
1433 | end if; | |
1434 | ||
725a69d2 | 1435 | -- Ada 2005 (AI-251): Look for interface type formals to force "this" |
1436 | -- displacement | |
1437 | ||
aad6babd | 1438 | Formal := First_Formal (Subp); |
1439 | Actual := First_Actual (Call_Node); | |
aad6babd | 1440 | while Present (Formal) loop |
725a69d2 | 1441 | Formal_Typ := Etype (Formal); |
d62940bf | 1442 | |
1443 | if Ekind (Formal_Typ) = E_Record_Type_With_Private then | |
1444 | Formal_Typ := Full_View (Formal_Typ); | |
1445 | end if; | |
1446 | ||
1447 | if Is_Access_Type (Formal_Typ) then | |
1448 | Formal_DDT := Directly_Designated_Type (Formal_Typ); | |
1449 | end if; | |
1450 | ||
aad6babd | 1451 | Actual_Typ := Etype (Actual); |
1452 | ||
d62940bf | 1453 | if Is_Access_Type (Actual_Typ) then |
1454 | Actual_DDT := Directly_Designated_Type (Actual_Typ); | |
1455 | end if; | |
1456 | ||
725a69d2 | 1457 | if Is_Interface (Formal_Typ) |
1458 | and then Is_Class_Wide_Type (Formal_Typ) | |
1459 | then | |
d62940bf | 1460 | -- No need to displace the pointer if the type of the actual |
1d00a8ce | 1461 | -- coincides with the type of the formal. |
aad6babd | 1462 | |
725a69d2 | 1463 | if Actual_Typ = Formal_Typ then |
d62940bf | 1464 | null; |
1465 | ||
725a69d2 | 1466 | -- No need to displace the pointer if the interface type is |
1467 | -- a parent of the type of the actual because in this case the | |
1468 | -- interface primitives are located in the primary dispatch table. | |
aad6babd | 1469 | |
cb4af01d | 1470 | elsif Is_Ancestor (Formal_Typ, Actual_Typ, |
1471 | Use_Full_View => True) | |
1472 | then | |
d62940bf | 1473 | null; |
1474 | ||
725a69d2 | 1475 | -- Implicit conversion to the class-wide formal type to force |
1476 | -- the displacement of the pointer. | |
1477 | ||
d62940bf | 1478 | else |
8a8d9086 | 1479 | -- Normally, expansion of actuals for calls to build-in-place |
1480 | -- functions happens as part of Expand_Actuals, but in this | |
1481 | -- case the call will be wrapped in a conversion and soon after | |
1482 | -- expanded further to handle the displacement for a class-wide | |
1483 | -- interface conversion, so if this is a BIP call then we need | |
1484 | -- to handle it now. | |
1485 | ||
1486 | if Ada_Version >= Ada_2005 | |
1487 | and then Is_Build_In_Place_Function_Call (Actual) | |
1488 | then | |
1489 | Make_Build_In_Place_Call_In_Anonymous_Context (Actual); | |
1490 | end if; | |
1491 | ||
d62940bf | 1492 | Conversion := Convert_To (Formal_Typ, Relocate_Node (Actual)); |
725a69d2 | 1493 | Rewrite (Actual, Conversion); |
d62940bf | 1494 | Analyze_And_Resolve (Actual, Formal_Typ); |
1495 | end if; | |
aad6babd | 1496 | |
725a69d2 | 1497 | -- Access to class-wide interface type |
aad6babd | 1498 | |
1499 | elsif Is_Access_Type (Formal_Typ) | |
725a69d2 | 1500 | and then Is_Interface (Formal_DDT) |
1501 | and then Is_Class_Wide_Type (Formal_DDT) | |
aad6babd | 1502 | and then Interface_Present_In_Ancestor |
d62940bf | 1503 | (Typ => Actual_DDT, |
1504 | Iface => Etype (Formal_DDT)) | |
aad6babd | 1505 | then |
725a69d2 | 1506 | -- Handle attributes 'Access and 'Unchecked_Access |
1507 | ||
aad6babd | 1508 | if Nkind (Actual) = N_Attribute_Reference |
1509 | and then | |
1510 | (Attribute_Name (Actual) = Name_Access | |
1511 | or else Attribute_Name (Actual) = Name_Unchecked_Access) | |
1512 | then | |
5e82d8fe | 1513 | -- This case must have been handled by the analysis and |
1514 | -- expansion of 'Access. The only exception is when types | |
1515 | -- match and no further expansion is required. | |
aad6babd | 1516 | |
5e82d8fe | 1517 | pragma Assert (Base_Type (Etype (Prefix (Actual))) |
1518 | = Base_Type (Formal_DDT)); | |
1519 | null; | |
aad6babd | 1520 | |
725a69d2 | 1521 | -- No need to displace the pointer if the type of the actual |
1522 | -- coincides with the type of the formal. | |
d62940bf | 1523 | |
725a69d2 | 1524 | elsif Actual_DDT = Formal_DDT then |
d62940bf | 1525 | null; |
1526 | ||
725a69d2 | 1527 | -- No need to displace the pointer if the interface type is |
1528 | -- a parent of the type of the actual because in this case the | |
1529 | -- interface primitives are located in the primary dispatch table. | |
d62940bf | 1530 | |
cb4af01d | 1531 | elsif Is_Ancestor (Formal_DDT, Actual_DDT, |
1532 | Use_Full_View => True) | |
1533 | then | |
d62940bf | 1534 | null; |
1535 | ||
aad6babd | 1536 | else |
d62940bf | 1537 | Actual_Dup := Relocate_Node (Actual); |
1538 | ||
1539 | if From_With_Type (Actual_Typ) then | |
1540 | ||
1541 | -- If the type of the actual parameter comes from a limited | |
1542 | -- with-clause and the non-limited view is already available | |
9ced80be | 1543 | -- we replace the anonymous access type by a duplicate |
1544 | -- declaration whose designated type is the non-limited view | |
d62940bf | 1545 | |
1546 | if Ekind (Actual_DDT) = E_Incomplete_Type | |
1547 | and then Present (Non_Limited_View (Actual_DDT)) | |
1548 | then | |
1549 | Anon := New_Copy (Actual_Typ); | |
1550 | ||
1551 | if Is_Itype (Anon) then | |
1552 | Set_Scope (Anon, Current_Scope); | |
1553 | end if; | |
1554 | ||
1555 | Set_Directly_Designated_Type (Anon, | |
1556 | Non_Limited_View (Actual_DDT)); | |
1557 | Set_Etype (Actual_Dup, Anon); | |
1558 | ||
1559 | elsif Is_Class_Wide_Type (Actual_DDT) | |
1560 | and then Ekind (Etype (Actual_DDT)) = E_Incomplete_Type | |
1561 | and then Present (Non_Limited_View (Etype (Actual_DDT))) | |
1562 | then | |
1563 | Anon := New_Copy (Actual_Typ); | |
1564 | ||
1565 | if Is_Itype (Anon) then | |
1566 | Set_Scope (Anon, Current_Scope); | |
1567 | end if; | |
1568 | ||
1569 | Set_Directly_Designated_Type (Anon, | |
1570 | New_Copy (Actual_DDT)); | |
1571 | Set_Class_Wide_Type (Directly_Designated_Type (Anon), | |
1572 | New_Copy (Class_Wide_Type (Actual_DDT))); | |
1573 | Set_Etype (Directly_Designated_Type (Anon), | |
1574 | Non_Limited_View (Etype (Actual_DDT))); | |
1575 | Set_Etype ( | |
1576 | Class_Wide_Type (Directly_Designated_Type (Anon)), | |
1577 | Non_Limited_View (Etype (Actual_DDT))); | |
1578 | Set_Etype (Actual_Dup, Anon); | |
1579 | end if; | |
1580 | end if; | |
1581 | ||
1582 | Conversion := Convert_To (Formal_Typ, Actual_Dup); | |
1583 | Rewrite (Actual, Conversion); | |
aad6babd | 1584 | Analyze_And_Resolve (Actual, Formal_Typ); |
1585 | end if; | |
1586 | end if; | |
1587 | ||
1588 | Next_Actual (Actual); | |
1589 | Next_Formal (Formal); | |
1590 | end loop; | |
1591 | end Expand_Interface_Actuals; | |
1592 | ||
1593 | ---------------------------- | |
1594 | -- Expand_Interface_Thunk -- | |
1595 | ---------------------------- | |
1596 | ||
725a69d2 | 1597 | procedure Expand_Interface_Thunk |
17e14451 | 1598 | (Prim : Node_Id; |
1599 | Thunk_Id : out Entity_Id; | |
1600 | Thunk_Code : out Node_Id) | |
aad6babd | 1601 | is |
e8376947 | 1602 | Loc : constant Source_Ptr := Sloc (Prim); |
1603 | Actuals : constant List_Id := New_List; | |
1604 | Decl : constant List_Id := New_List; | |
1605 | Formals : constant List_Id := New_List; | |
1606 | Target : constant Entity_Id := Ultimate_Alias (Prim); | |
725a69d2 | 1607 | |
1608 | Controlling_Typ : Entity_Id; | |
1609 | Decl_1 : Node_Id; | |
1610 | Decl_2 : Node_Id; | |
04c6d723 | 1611 | Expr : Node_Id; |
725a69d2 | 1612 | Formal : Node_Id; |
04c6d723 | 1613 | Ftyp : Entity_Id; |
1614 | Iface_Formal : Node_Id; | |
cc60bd16 | 1615 | New_Arg : Node_Id; |
1616 | Offset_To_Top : Node_Id; | |
725a69d2 | 1617 | Target_Formal : Entity_Id; |
aad6babd | 1618 | |
1619 | begin | |
725a69d2 | 1620 | Thunk_Id := Empty; |
1621 | Thunk_Code := Empty; | |
1622 | ||
3f8cf2d2 | 1623 | -- No thunk needed if the primitive has been eliminated |
1624 | ||
1625 | if Is_Eliminated (Ultimate_Alias (Prim)) then | |
1626 | return; | |
1627 | ||
e8376947 | 1628 | -- In case of primitives that are functions without formals and a |
1629 | -- controlling result there is no need to build the thunk. | |
725a69d2 | 1630 | |
3f8cf2d2 | 1631 | elsif not Present (First_Formal (Target)) then |
725a69d2 | 1632 | pragma Assert (Ekind (Target) = E_Function |
1633 | and then Has_Controlling_Result (Target)); | |
1634 | return; | |
1635 | end if; | |
1636 | ||
04c6d723 | 1637 | -- Duplicate the formals of the Target primitive. In the thunk, the type |
1638 | -- of the controlling formal is the covered interface type (instead of | |
1639 | -- the target tagged type). Done to avoid problems with discriminated | |
1640 | -- tagged types because, if the controlling type has discriminants with | |
e8376947 | 1641 | -- default values, then the type conversions done inside the body of |
1642 | -- the thunk (after the displacement of the pointer to the base of the | |
04c6d723 | 1643 | -- actual object) generate code that modify its contents. |
1644 | ||
1645 | -- Note: This special management is not done for predefined primitives | |
1646 | -- because??? | |
1647 | ||
1648 | if not Is_Predefined_Dispatching_Operation (Prim) then | |
1649 | Iface_Formal := First_Formal (Interface_Alias (Prim)); | |
1650 | end if; | |
aad6babd | 1651 | |
d62940bf | 1652 | Formal := First_Formal (Target); |
aad6babd | 1653 | while Present (Formal) loop |
04c6d723 | 1654 | Ftyp := Etype (Formal); |
1655 | ||
1656 | -- Use the interface type as the type of the controlling formal (see | |
e8376947 | 1657 | -- comment above). |
04c6d723 | 1658 | |
1659 | if not Is_Controlling_Formal (Formal) | |
1660 | or else Is_Predefined_Dispatching_Operation (Prim) | |
1661 | then | |
1662 | Ftyp := Etype (Formal); | |
1663 | Expr := New_Copy_Tree (Expression (Parent (Formal))); | |
1664 | else | |
1665 | Ftyp := Etype (Iface_Formal); | |
1666 | Expr := Empty; | |
1667 | end if; | |
1668 | ||
725a69d2 | 1669 | Append_To (Formals, |
1670 | Make_Parameter_Specification (Loc, | |
1671 | Defining_Identifier => | |
1672 | Make_Defining_Identifier (Sloc (Formal), | |
1673 | Chars => Chars (Formal)), | |
1674 | In_Present => In_Present (Parent (Formal)), | |
1675 | Out_Present => Out_Present (Parent (Formal)), | |
04c6d723 | 1676 | Parameter_Type => New_Reference_To (Ftyp, Loc), |
1677 | Expression => Expr)); | |
1678 | ||
1679 | if not Is_Predefined_Dispatching_Operation (Prim) then | |
1680 | Next_Formal (Iface_Formal); | |
1681 | end if; | |
d62940bf | 1682 | |
aad6babd | 1683 | Next_Formal (Formal); |
1684 | end loop; | |
1685 | ||
17e14451 | 1686 | Controlling_Typ := Find_Dispatching_Type (Target); |
aad6babd | 1687 | |
725a69d2 | 1688 | Target_Formal := First_Formal (Target); |
1689 | Formal := First (Formals); | |
1690 | while Present (Formal) loop | |
04c6d723 | 1691 | |
6cd460aa | 1692 | -- If the parent is a constrained discriminated type, then the |
1693 | -- primitive operation will have been defined on a first subtype. | |
1694 | -- For proper matching with controlling type, use base type. | |
04c6d723 | 1695 | |
1696 | if Ekind (Target_Formal) = E_In_Parameter | |
1697 | and then Ekind (Etype (Target_Formal)) = E_Anonymous_Access_Type | |
1698 | then | |
6cd460aa | 1699 | Ftyp := |
1700 | Base_Type (Directly_Designated_Type (Etype (Target_Formal))); | |
04c6d723 | 1701 | else |
ca12fde2 | 1702 | Ftyp := Base_Type (Etype (Target_Formal)); |
04c6d723 | 1703 | end if; |
1704 | ||
232a63ed | 1705 | -- For concurrent types, the relevant information is found in the |
1706 | -- Corresponding_Record_Type, rather than the type entity itself. | |
6cd460aa | 1707 | |
04c6d723 | 1708 | if Is_Concurrent_Type (Ftyp) then |
1709 | Ftyp := Corresponding_Record_Type (Ftyp); | |
1710 | end if; | |
1711 | ||
725a69d2 | 1712 | if Ekind (Target_Formal) = E_In_Parameter |
1713 | and then Ekind (Etype (Target_Formal)) = E_Anonymous_Access_Type | |
04c6d723 | 1714 | and then Ftyp = Controlling_Typ |
725a69d2 | 1715 | then |
1716 | -- Generate: | |
17e14451 | 1717 | -- type T is access all <<type of the target formal>> |
1718 | -- S : Storage_Offset := Storage_Offset!(Formal) | |
1719 | -- - Offset_To_Top (address!(Formal)) | |
725a69d2 | 1720 | |
1721 | Decl_2 := | |
1722 | Make_Full_Type_Declaration (Loc, | |
ec97ce79 | 1723 | Defining_Identifier => Make_Temporary (Loc, 'T'), |
725a69d2 | 1724 | Type_Definition => |
1725 | Make_Access_To_Object_Definition (Loc, | |
1726 | All_Present => True, | |
1727 | Null_Exclusion_Present => False, | |
1728 | Constant_Present => False, | |
1729 | Subtype_Indication => | |
04c6d723 | 1730 | New_Reference_To (Ftyp, Loc))); |
725a69d2 | 1731 | |
cc60bd16 | 1732 | New_Arg := |
1733 | Unchecked_Convert_To (RTE (RE_Address), | |
1734 | New_Reference_To (Defining_Identifier (Formal), Loc)); | |
1735 | ||
1736 | if not RTE_Available (RE_Offset_To_Top) then | |
1737 | Offset_To_Top := | |
1738 | Build_Offset_To_Top (Loc, New_Arg); | |
1739 | else | |
1740 | Offset_To_Top := | |
1741 | Make_Function_Call (Loc, | |
1742 | Name => New_Reference_To (RTE (RE_Offset_To_Top), Loc), | |
1743 | Parameter_Associations => New_List (New_Arg)); | |
1744 | end if; | |
1745 | ||
725a69d2 | 1746 | Decl_1 := |
1747 | Make_Object_Declaration (Loc, | |
ec97ce79 | 1748 | Defining_Identifier => Make_Temporary (Loc, 'S'), |
725a69d2 | 1749 | Constant_Present => True, |
1750 | Object_Definition => | |
1751 | New_Reference_To (RTE (RE_Storage_Offset), Loc), | |
1752 | Expression => | |
1753 | Make_Op_Subtract (Loc, | |
1754 | Left_Opnd => | |
1755 | Unchecked_Convert_To | |
1756 | (RTE (RE_Storage_Offset), | |
1757 | New_Reference_To (Defining_Identifier (Formal), Loc)), | |
1758 | Right_Opnd => | |
cc60bd16 | 1759 | Offset_To_Top)); |
725a69d2 | 1760 | |
1761 | Append_To (Decl, Decl_2); | |
1762 | Append_To (Decl, Decl_1); | |
1763 | ||
17e14451 | 1764 | -- Reference the new actual. Generate: |
1765 | -- T!(S) | |
725a69d2 | 1766 | |
1767 | Append_To (Actuals, | |
1768 | Unchecked_Convert_To | |
1769 | (Defining_Identifier (Decl_2), | |
1770 | New_Reference_To (Defining_Identifier (Decl_1), Loc))); | |
1771 | ||
04c6d723 | 1772 | elsif Ftyp = Controlling_Typ then |
aad6babd | 1773 | |
e8376947 | 1774 | -- Generate: |
17e14451 | 1775 | -- S1 : Storage_Offset := Storage_Offset!(Formal'Address) |
1776 | -- - Offset_To_Top (Formal'Address) | |
1777 | -- S2 : Addr_Ptr := Addr_Ptr!(S1) | |
aad6babd | 1778 | |
cc60bd16 | 1779 | New_Arg := |
1780 | Make_Attribute_Reference (Loc, | |
1781 | Prefix => | |
1782 | New_Reference_To (Defining_Identifier (Formal), Loc), | |
1783 | Attribute_Name => | |
1784 | Name_Address); | |
1785 | ||
1786 | if not RTE_Available (RE_Offset_To_Top) then | |
1787 | Offset_To_Top := | |
1788 | Build_Offset_To_Top (Loc, New_Arg); | |
1789 | else | |
1790 | Offset_To_Top := | |
1791 | Make_Function_Call (Loc, | |
1792 | Name => New_Reference_To (RTE (RE_Offset_To_Top), Loc), | |
1793 | Parameter_Associations => New_List (New_Arg)); | |
1794 | end if; | |
1795 | ||
725a69d2 | 1796 | Decl_1 := |
1797 | Make_Object_Declaration (Loc, | |
ec97ce79 | 1798 | Defining_Identifier => Make_Temporary (Loc, 'S'), |
725a69d2 | 1799 | Constant_Present => True, |
1800 | Object_Definition => | |
1801 | New_Reference_To (RTE (RE_Storage_Offset), Loc), | |
1802 | Expression => | |
1803 | Make_Op_Subtract (Loc, | |
1804 | Left_Opnd => | |
1805 | Unchecked_Convert_To | |
1806 | (RTE (RE_Storage_Offset), | |
1807 | Make_Attribute_Reference (Loc, | |
1808 | Prefix => | |
1809 | New_Reference_To | |
1810 | (Defining_Identifier (Formal), Loc), | |
1811 | Attribute_Name => Name_Address)), | |
1812 | Right_Opnd => | |
cc60bd16 | 1813 | Offset_To_Top)); |
aad6babd | 1814 | |
725a69d2 | 1815 | Decl_2 := |
1816 | Make_Object_Declaration (Loc, | |
ec97ce79 | 1817 | Defining_Identifier => Make_Temporary (Loc, 'S'), |
1818 | Constant_Present => True, | |
1819 | Object_Definition => | |
1820 | New_Reference_To (RTE (RE_Addr_Ptr), Loc), | |
1821 | Expression => | |
725a69d2 | 1822 | Unchecked_Convert_To |
1823 | (RTE (RE_Addr_Ptr), | |
1824 | New_Reference_To (Defining_Identifier (Decl_1), Loc))); | |
aad6babd | 1825 | |
725a69d2 | 1826 | Append_To (Decl, Decl_1); |
1827 | Append_To (Decl, Decl_2); | |
952af0b9 | 1828 | |
ec97ce79 | 1829 | -- Reference the new actual, generate: |
17e14451 | 1830 | -- Target_Formal (S2.all) |
aad6babd | 1831 | |
725a69d2 | 1832 | Append_To (Actuals, |
04c6d723 | 1833 | Unchecked_Convert_To (Ftyp, |
725a69d2 | 1834 | Make_Explicit_Dereference (Loc, |
1835 | New_Reference_To (Defining_Identifier (Decl_2), Loc)))); | |
aad6babd | 1836 | |
984d005d | 1837 | -- Ensure proper matching of access types. Required to avoid |
1838 | -- reporting spurious errors. | |
1839 | ||
1840 | elsif Is_Access_Type (Etype (Target_Formal)) then | |
1841 | Append_To (Actuals, | |
1842 | Unchecked_Convert_To (Base_Type (Etype (Target_Formal)), | |
1843 | New_Reference_To (Defining_Identifier (Formal), Loc))); | |
1844 | ||
725a69d2 | 1845 | -- No special management required for this actual |
aad6babd | 1846 | |
725a69d2 | 1847 | else |
1848 | Append_To (Actuals, | |
1849 | New_Reference_To (Defining_Identifier (Formal), Loc)); | |
1850 | end if; | |
1851 | ||
1852 | Next_Formal (Target_Formal); | |
aad6babd | 1853 | Next (Formal); |
1854 | end loop; | |
1855 | ||
ec97ce79 | 1856 | Thunk_Id := Make_Temporary (Loc, 'T'); |
e7e688dd | 1857 | Set_Is_Thunk (Thunk_Id); |
265200d0 | 1858 | Set_Convention (Thunk_Id, Convention (Prim)); |
e7e688dd | 1859 | |
e8376947 | 1860 | -- Procedure case |
1861 | ||
d62940bf | 1862 | if Ekind (Target) = E_Procedure then |
725a69d2 | 1863 | Thunk_Code := |
aad6babd | 1864 | Make_Subprogram_Body (Loc, |
1865 | Specification => | |
1866 | Make_Procedure_Specification (Loc, | |
1867 | Defining_Unit_Name => Thunk_Id, | |
1868 | Parameter_Specifications => Formals), | |
1869 | Declarations => Decl, | |
1870 | Handled_Statement_Sequence => | |
1871 | Make_Handled_Sequence_Of_Statements (Loc, | |
1872 | Statements => New_List ( | |
1873 | Make_Procedure_Call_Statement (Loc, | |
725a69d2 | 1874 | Name => New_Occurrence_Of (Target, Loc), |
1875 | Parameter_Associations => Actuals)))); | |
aad6babd | 1876 | |
e8376947 | 1877 | -- Function case |
aad6babd | 1878 | |
e8376947 | 1879 | else pragma Assert (Ekind (Target) = E_Function); |
725a69d2 | 1880 | Thunk_Code := |
aad6babd | 1881 | Make_Subprogram_Body (Loc, |
1882 | Specification => | |
1883 | Make_Function_Specification (Loc, | |
1884 | Defining_Unit_Name => Thunk_Id, | |
1885 | Parameter_Specifications => Formals, | |
d62940bf | 1886 | Result_Definition => |
1887 | New_Copy (Result_Definition (Parent (Target)))), | |
aad6babd | 1888 | Declarations => Decl, |
1889 | Handled_Statement_Sequence => | |
1890 | Make_Handled_Sequence_Of_Statements (Loc, | |
1891 | Statements => New_List ( | |
17e14451 | 1892 | Make_Simple_Return_Statement (Loc, |
aad6babd | 1893 | Make_Function_Call (Loc, |
1894 | Name => New_Occurrence_Of (Target, Loc), | |
1895 | Parameter_Associations => Actuals))))); | |
1896 | end if; | |
aad6babd | 1897 | end Expand_Interface_Thunk; |
1898 | ||
bb5dfacc | 1899 | ------------------------ |
1900 | -- Find_Specific_Type -- | |
1901 | ------------------------ | |
1902 | ||
1903 | function Find_Specific_Type (CW : Entity_Id) return Entity_Id is | |
1904 | Typ : Entity_Id := Root_Type (CW); | |
1905 | ||
1906 | begin | |
1907 | if Ekind (Typ) = E_Incomplete_Type then | |
1908 | if From_With_Type (Typ) then | |
1909 | Typ := Non_Limited_View (Typ); | |
1910 | else | |
1911 | Typ := Full_View (Typ); | |
1912 | end if; | |
1913 | end if; | |
1914 | ||
1915 | return Typ; | |
1916 | end Find_Specific_Type; | |
1917 | ||
d00681a7 | 1918 | -------------------------- |
1919 | -- Has_CPP_Constructors -- | |
1920 | -------------------------- | |
1921 | ||
1922 | function Has_CPP_Constructors (Typ : Entity_Id) return Boolean is | |
1923 | E : Entity_Id; | |
1924 | ||
1925 | begin | |
1926 | -- Look for the constructor entities | |
1927 | ||
1928 | E := Next_Entity (Typ); | |
1929 | while Present (E) loop | |
1930 | if Ekind (E) = E_Function | |
1931 | and then Is_Constructor (E) | |
1932 | then | |
1933 | return True; | |
1934 | end if; | |
1935 | ||
1936 | Next_Entity (E); | |
1937 | end loop; | |
1938 | ||
1939 | return False; | |
1940 | end Has_CPP_Constructors; | |
1941 | ||
24971415 | 1942 | ------------ |
1943 | -- Has_DT -- | |
1944 | ------------ | |
1945 | ||
1946 | function Has_DT (Typ : Entity_Id) return Boolean is | |
1947 | begin | |
1948 | return not Is_Interface (Typ) | |
1949 | and then not Restriction_Active (No_Dispatching_Calls); | |
1950 | end Has_DT; | |
1951 | ||
a652dd51 | 1952 | ----------------------------------------- |
1953 | -- Is_Predefined_Dispatching_Operation -- | |
1954 | ----------------------------------------- | |
1955 | ||
1956 | function Is_Predefined_Dispatching_Operation | |
1957 | (E : Entity_Id) return Boolean | |
1958 | is | |
1959 | TSS_Name : TSS_Name_Type; | |
1960 | ||
1961 | begin | |
1962 | if not Is_Dispatching_Operation (E) then | |
1963 | return False; | |
1964 | end if; | |
1965 | ||
1966 | Get_Name_String (Chars (E)); | |
1967 | ||
1968 | -- Most predefined primitives have internally generated names. Equality | |
1969 | -- must be treated differently; the predefined operation is recognized | |
1970 | -- as a homogeneous binary operator that returns Boolean. | |
1971 | ||
1972 | if Name_Len > TSS_Name_Type'Last then | |
1973 | TSS_Name := TSS_Name_Type (Name_Buffer (Name_Len - TSS_Name'Length + 1 | |
1974 | .. Name_Len)); | |
1975 | if Chars (E) = Name_uSize | |
a652dd51 | 1976 | or else TSS_Name = TSS_Stream_Read |
1977 | or else TSS_Name = TSS_Stream_Write | |
1978 | or else TSS_Name = TSS_Stream_Input | |
1979 | or else TSS_Name = TSS_Stream_Output | |
1980 | or else | |
1981 | (Chars (E) = Name_Op_Eq | |
30592778 | 1982 | and then Etype (First_Formal (E)) = Etype (Last_Formal (E))) |
a652dd51 | 1983 | or else Chars (E) = Name_uAssign |
1984 | or else TSS_Name = TSS_Deep_Adjust | |
1985 | or else TSS_Name = TSS_Deep_Finalize | |
1986 | or else Is_Predefined_Interface_Primitive (E) | |
1987 | then | |
1988 | return True; | |
1989 | end if; | |
1990 | end if; | |
1991 | ||
1992 | return False; | |
1993 | end Is_Predefined_Dispatching_Operation; | |
1994 | ||
d1458a07 | 1995 | --------------------------------------- |
1996 | -- Is_Predefined_Internal_Operation -- | |
1997 | --------------------------------------- | |
1998 | ||
1999 | function Is_Predefined_Internal_Operation | |
2000 | (E : Entity_Id) return Boolean | |
2001 | is | |
2002 | TSS_Name : TSS_Name_Type; | |
2003 | ||
2004 | begin | |
2005 | if not Is_Dispatching_Operation (E) then | |
2006 | return False; | |
2007 | end if; | |
2008 | ||
2009 | Get_Name_String (Chars (E)); | |
2010 | ||
2011 | -- Most predefined primitives have internally generated names. Equality | |
2012 | -- must be treated differently; the predefined operation is recognized | |
2013 | -- as a homogeneous binary operator that returns Boolean. | |
2014 | ||
2015 | if Name_Len > TSS_Name_Type'Last then | |
2016 | TSS_Name := | |
2017 | TSS_Name_Type | |
2018 | (Name_Buffer (Name_Len - TSS_Name'Length + 1 .. Name_Len)); | |
2019 | ||
2020 | if Chars (E) = Name_uSize | |
d1458a07 | 2021 | or else |
2022 | (Chars (E) = Name_Op_Eq | |
30592778 | 2023 | and then Etype (First_Formal (E)) = Etype (Last_Formal (E))) |
d1458a07 | 2024 | or else Chars (E) = Name_uAssign |
2025 | or else TSS_Name = TSS_Deep_Adjust | |
2026 | or else TSS_Name = TSS_Deep_Finalize | |
2027 | or else Is_Predefined_Interface_Primitive (E) | |
2028 | then | |
2029 | return True; | |
2030 | end if; | |
2031 | end if; | |
2032 | ||
2033 | return False; | |
2034 | end Is_Predefined_Internal_Operation; | |
2035 | ||
af647dc7 | 2036 | ------------------------------------- |
2037 | -- Is_Predefined_Dispatching_Alias -- | |
2038 | ------------------------------------- | |
2039 | ||
2040 | function Is_Predefined_Dispatching_Alias (Prim : Entity_Id) return Boolean | |
2041 | is | |
af647dc7 | 2042 | begin |
fc2907f6 | 2043 | return not Is_Predefined_Dispatching_Operation (Prim) |
af647dc7 | 2044 | and then Present (Alias (Prim)) |
fc2907f6 | 2045 | and then Is_Predefined_Dispatching_Operation (Ultimate_Alias (Prim)); |
af647dc7 | 2046 | end Is_Predefined_Dispatching_Alias; |
2047 | ||
a652dd51 | 2048 | --------------------------------------- |
2049 | -- Is_Predefined_Interface_Primitive -- | |
2050 | --------------------------------------- | |
2051 | ||
2052 | function Is_Predefined_Interface_Primitive (E : Entity_Id) return Boolean is | |
2053 | begin | |
6cb4b973 | 2054 | -- In VM targets we don't restrict the functionality of this test to |
2055 | -- compiling in Ada 2005 mode since in VM targets any tagged type has | |
2056 | -- these primitives | |
2057 | ||
2058 | return (Ada_Version >= Ada_2005 or else not Tagged_Type_Expansion) | |
a652dd51 | 2059 | and then (Chars (E) = Name_uDisp_Asynchronous_Select or else |
2060 | Chars (E) = Name_uDisp_Conditional_Select or else | |
2061 | Chars (E) = Name_uDisp_Get_Prim_Op_Kind or else | |
2062 | Chars (E) = Name_uDisp_Get_Task_Id or else | |
2063 | Chars (E) = Name_uDisp_Requeue or else | |
2064 | Chars (E) = Name_uDisp_Timed_Select); | |
2065 | end Is_Predefined_Interface_Primitive; | |
2066 | ||
76a1c25b | 2067 | ---------------------------------------- |
2068 | -- Make_Disp_Asynchronous_Select_Body -- | |
2069 | ---------------------------------------- | |
ee6ba406 | 2070 | |
cdb1c38f | 2071 | -- For interface types, generate: |
2072 | ||
2073 | -- procedure _Disp_Asynchronous_Select | |
2074 | -- (T : in out <Typ>; | |
2075 | -- S : Integer; | |
2076 | -- P : System.Address; | |
2077 | -- B : out System.Storage_Elements.Dummy_Communication_Block; | |
2078 | -- F : out Boolean) | |
2079 | -- is | |
2080 | -- begin | |
a053db0d | 2081 | -- F := False; |
2082 | -- C := Ada.Tags.POK_Function; | |
cdb1c38f | 2083 | -- end _Disp_Asynchronous_Select; |
2084 | ||
2085 | -- For protected types, generate: | |
2086 | ||
2087 | -- procedure _Disp_Asynchronous_Select | |
2088 | -- (T : in out <Typ>; | |
2089 | -- S : Integer; | |
2090 | -- P : System.Address; | |
2091 | -- B : out System.Storage_Elements.Dummy_Communication_Block; | |
2092 | -- F : out Boolean) | |
2093 | -- is | |
2094 | -- I : Integer := | |
2095 | -- Ada.Tags.Get_Entry_Index (Ada.Tags.Tag (<Typ>VP, S)); | |
2096 | -- Bnn : System.Tasking.Protected_Objects.Operations. | |
2097 | -- Communication_Block; | |
2098 | -- begin | |
2099 | -- System.Tasking.Protected_Objects.Operations.Protected_Entry_Call | |
2100 | -- (T._object'Access, | |
2101 | -- System.Tasking.Protected_Objects.Protected_Entry_Index (I), | |
2102 | -- P, | |
2103 | -- System.Tasking.Asynchronous_Call, | |
2104 | -- Bnn); | |
2105 | -- B := System.Storage_Elements.Dummy_Communication_Block (Bnn); | |
2106 | -- end _Disp_Asynchronous_Select; | |
2107 | ||
2108 | -- For task types, generate: | |
2109 | ||
2110 | -- procedure _Disp_Asynchronous_Select | |
2111 | -- (T : in out <Typ>; | |
2112 | -- S : Integer; | |
2113 | -- P : System.Address; | |
2114 | -- B : out System.Storage_Elements.Dummy_Communication_Block; | |
2115 | -- F : out Boolean) | |
2116 | -- is | |
2117 | -- I : Integer := | |
2118 | -- Ada.Tags.Get_Entry_Index (Ada.Tags.Tag (<Typ>VP, S)); | |
2119 | -- begin | |
2120 | -- System.Tasking.Rendezvous.Task_Entry_Call | |
2121 | -- (T._task_id, | |
2122 | -- System.Tasking.Task_Entry_Index (I), | |
2123 | -- P, | |
2124 | -- System.Tasking.Asynchronous_Call, | |
2125 | -- F); | |
2126 | -- end _Disp_Asynchronous_Select; | |
2127 | ||
76a1c25b | 2128 | function Make_Disp_Asynchronous_Select_Body |
2129 | (Typ : Entity_Id) return Node_Id | |
2130 | is | |
725a69d2 | 2131 | Com_Block : Entity_Id; |
2132 | Conc_Typ : Entity_Id := Empty; | |
2133 | Decls : constant List_Id := New_List; | |
725a69d2 | 2134 | Loc : constant Source_Ptr := Sloc (Typ); |
acf97c11 | 2135 | Obj_Ref : Node_Id; |
725a69d2 | 2136 | Stmts : constant List_Id := New_List; |
bf7f5966 | 2137 | Tag_Node : Node_Id; |
ee6ba406 | 2138 | |
2139 | begin | |
68f95949 | 2140 | pragma Assert (not Restriction_Active (No_Dispatching_Calls)); |
2141 | ||
952af0b9 | 2142 | -- Null body is generated for interface types |
2143 | ||
76a1c25b | 2144 | if Is_Interface (Typ) then |
2145 | return | |
2146 | Make_Subprogram_Body (Loc, | |
aabafdc2 | 2147 | Specification => Make_Disp_Asynchronous_Select_Spec (Typ), |
2148 | Declarations => New_List, | |
76a1c25b | 2149 | Handled_Statement_Sequence => |
2150 | Make_Handled_Sequence_Of_Statements (Loc, | |
a053db0d | 2151 | New_List (Make_Assignment_Statement (Loc, |
aabafdc2 | 2152 | Name => Make_Identifier (Loc, Name_uF), |
a053db0d | 2153 | Expression => New_Reference_To (Standard_False, Loc))))); |
9dfe12ae | 2154 | end if; |
2155 | ||
952af0b9 | 2156 | if Is_Concurrent_Record_Type (Typ) then |
2157 | Conc_Typ := Corresponding_Concurrent_Type (Typ); | |
aad6babd | 2158 | |
76a1c25b | 2159 | -- Generate: |
cdb1c38f | 2160 | -- I : Integer := |
2161 | -- Ada.Tags.Get_Entry_Index (Ada.Tags.Tag! (<type>VP), S); | |
aad6babd | 2162 | |
76a1c25b | 2163 | -- where I will be used to capture the entry index of the primitive |
2164 | -- wrapper at position S. | |
aad6babd | 2165 | |
bf7f5966 | 2166 | if Tagged_Type_Expansion then |
2167 | Tag_Node := | |
2168 | Unchecked_Convert_To (RTE (RE_Tag), | |
2169 | New_Reference_To | |
2170 | (Node (First_Elmt (Access_Disp_Table (Typ))), Loc)); | |
2171 | else | |
2172 | Tag_Node := | |
2173 | Make_Attribute_Reference (Loc, | |
2174 | Prefix => New_Reference_To (Typ, Loc), | |
2175 | Attribute_Name => Name_Tag); | |
2176 | end if; | |
2177 | ||
76a1c25b | 2178 | Append_To (Decls, |
2179 | Make_Object_Declaration (Loc, | |
2180 | Defining_Identifier => | |
2181 | Make_Defining_Identifier (Loc, Name_uI), | |
2182 | Object_Definition => | |
2183 | New_Reference_To (Standard_Integer, Loc), | |
2184 | Expression => | |
725a69d2 | 2185 | Make_Function_Call (Loc, |
cdb1c38f | 2186 | Name => |
2187 | New_Reference_To (RTE (RE_Get_Entry_Index), Loc), | |
2188 | Parameter_Associations => | |
2189 | New_List ( | |
bf7f5966 | 2190 | Tag_Node, |
cdb1c38f | 2191 | Make_Identifier (Loc, Name_uS))))); |
aad6babd | 2192 | |
76a1c25b | 2193 | if Ekind (Conc_Typ) = E_Protected_Type then |
aad6babd | 2194 | |
725a69d2 | 2195 | -- Generate: |
cdb1c38f | 2196 | -- Bnn : Communication_Block; |
725a69d2 | 2197 | |
ec97ce79 | 2198 | Com_Block := Make_Temporary (Loc, 'B'); |
725a69d2 | 2199 | Append_To (Decls, |
2200 | Make_Object_Declaration (Loc, | |
2201 | Defining_Identifier => | |
2202 | Com_Block, | |
2203 | Object_Definition => | |
2204 | New_Reference_To (RTE (RE_Communication_Block), Loc))); | |
2205 | ||
acf97c11 | 2206 | -- Build T._object'Access for calls below |
aad6babd | 2207 | |
acf97c11 | 2208 | Obj_Ref := |
2209 | Make_Attribute_Reference (Loc, | |
2210 | Attribute_Name => Name_Unchecked_Access, | |
2211 | Prefix => | |
2212 | Make_Selected_Component (Loc, | |
2213 | Prefix => Make_Identifier (Loc, Name_uT), | |
2214 | Selector_Name => Make_Identifier (Loc, Name_uObject))); | |
aad6babd | 2215 | |
acf97c11 | 2216 | case Corresponding_Runtime_Package (Conc_Typ) is |
2217 | when System_Tasking_Protected_Objects_Entries => | |
aad6babd | 2218 | |
acf97c11 | 2219 | -- Generate: |
2220 | -- Protected_Entry_Call | |
2221 | -- (T._object'Access, -- Object | |
2222 | -- Protected_Entry_Index! (I), -- E | |
2223 | -- P, -- Uninterpreted_Data | |
2224 | -- Asynchronous_Call, -- Mode | |
2225 | -- Bnn); -- Communication_Block | |
2226 | ||
2227 | -- where T is the protected object, I is the entry index, P | |
2228 | -- is the wrapped parameters and B is the name of the | |
2229 | -- communication block. | |
2230 | ||
2231 | Append_To (Stmts, | |
2232 | Make_Procedure_Call_Statement (Loc, | |
2233 | Name => | |
2234 | New_Reference_To (RTE (RE_Protected_Entry_Call), Loc), | |
2235 | Parameter_Associations => | |
2236 | New_List ( | |
2237 | Obj_Ref, | |
aad6babd | 2238 | |
acf97c11 | 2239 | Make_Unchecked_Type_Conversion (Loc, -- entry index |
2240 | Subtype_Mark => | |
2241 | New_Reference_To | |
55868293 | 2242 | (RTE (RE_Protected_Entry_Index), Loc), |
acf97c11 | 2243 | Expression => Make_Identifier (Loc, Name_uI)), |
d62940bf | 2244 | |
acf97c11 | 2245 | Make_Identifier (Loc, Name_uP), -- parameter block |
55868293 | 2246 | New_Reference_To -- Asynchronous_Call |
2247 | (RTE (RE_Asynchronous_Call), Loc), | |
acf97c11 | 2248 | |
2249 | New_Reference_To (Com_Block, Loc)))); -- comm block | |
2250 | ||
2251 | when System_Tasking_Protected_Objects_Single_Entry => | |
2252 | ||
2253 | -- Generate: | |
2254 | -- procedure Protected_Single_Entry_Call | |
2255 | -- (Object : Protection_Entry_Access; | |
2256 | -- Uninterpreted_Data : System.Address; | |
2257 | -- Mode : Call_Modes); | |
725a69d2 | 2258 | |
acf97c11 | 2259 | Append_To (Stmts, |
2260 | Make_Procedure_Call_Statement (Loc, | |
2261 | Name => | |
2262 | New_Reference_To | |
2263 | (RTE (RE_Protected_Single_Entry_Call), Loc), | |
2264 | Parameter_Associations => | |
2265 | New_List ( | |
2266 | Obj_Ref, | |
2267 | ||
2268 | Make_Attribute_Reference (Loc, | |
55868293 | 2269 | Prefix => Make_Identifier (Loc, Name_uP), |
acf97c11 | 2270 | Attribute_Name => Name_Address), |
2271 | ||
2272 | New_Reference_To | |
2273 | (RTE (RE_Asynchronous_Call), Loc)))); | |
2274 | ||
2275 | when others => | |
2276 | raise Program_Error; | |
2277 | end case; | |
725a69d2 | 2278 | |
2279 | -- Generate: | |
cdb1c38f | 2280 | -- B := Dummy_Communication_Block (Bnn); |
725a69d2 | 2281 | |
2282 | Append_To (Stmts, | |
2283 | Make_Assignment_Statement (Loc, | |
55868293 | 2284 | Name => Make_Identifier (Loc, Name_uB), |
725a69d2 | 2285 | Expression => |
2286 | Make_Unchecked_Type_Conversion (Loc, | |
2287 | Subtype_Mark => | |
2288 | New_Reference_To ( | |
2289 | RTE (RE_Dummy_Communication_Block), Loc), | |
2290 | Expression => | |
2291 | New_Reference_To (Com_Block, Loc)))); | |
2292 | ||
a053db0d | 2293 | -- Generate: |
2294 | -- F := False; | |
2295 | ||
2296 | Append_To (Stmts, | |
2297 | Make_Assignment_Statement (Loc, | |
aabafdc2 | 2298 | Name => Make_Identifier (Loc, Name_uF), |
a053db0d | 2299 | Expression => New_Reference_To (Standard_False, Loc))); |
2300 | ||
76a1c25b | 2301 | else |
2302 | pragma Assert (Ekind (Conc_Typ) = E_Task_Type); | |
d62940bf | 2303 | |
76a1c25b | 2304 | -- Generate: |
cdb1c38f | 2305 | -- Task_Entry_Call |
2306 | -- (T._task_id, -- Acceptor | |
2307 | -- Task_Entry_Index! (I), -- E | |
2308 | -- P, -- Uninterpreted_Data | |
2309 | -- Asynchronous_Call, -- Mode | |
2310 | -- F); -- Rendezvous_Successful | |
ee6ba406 | 2311 | |
acf97c11 | 2312 | -- where T is the task object, I is the entry index, P is the |
76a1c25b | 2313 | -- wrapped parameters and F is the status flag. |
ee6ba406 | 2314 | |
76a1c25b | 2315 | Append_To (Stmts, |
2316 | Make_Procedure_Call_Statement (Loc, | |
2317 | Name => | |
2318 | New_Reference_To (RTE (RE_Task_Entry_Call), Loc), | |
2319 | Parameter_Associations => | |
2320 | New_List ( | |
76a1c25b | 2321 | Make_Selected_Component (Loc, -- T._task_id |
55868293 | 2322 | Prefix => Make_Identifier (Loc, Name_uT), |
2323 | Selector_Name => Make_Identifier (Loc, Name_uTask_Id)), | |
ee6ba406 | 2324 | |
76a1c25b | 2325 | Make_Unchecked_Type_Conversion (Loc, -- entry index |
2326 | Subtype_Mark => | |
2327 | New_Reference_To (RTE (RE_Task_Entry_Index), Loc), | |
55868293 | 2328 | Expression => Make_Identifier (Loc, Name_uI)), |
ee6ba406 | 2329 | |
76a1c25b | 2330 | Make_Identifier (Loc, Name_uP), -- parameter block |
55868293 | 2331 | New_Reference_To -- Asynchronous_Call |
2332 | (RTE (RE_Asynchronous_Call), Loc), | |
76a1c25b | 2333 | Make_Identifier (Loc, Name_uF)))); -- status flag |
2334 | end if; | |
7c949aad | 2335 | |
2336 | else | |
2337 | -- Ensure that the statements list is non-empty | |
2338 | ||
a053db0d | 2339 | Append_To (Stmts, |
2340 | Make_Assignment_Statement (Loc, | |
aabafdc2 | 2341 | Name => Make_Identifier (Loc, Name_uF), |
a053db0d | 2342 | Expression => New_Reference_To (Standard_False, Loc))); |
76a1c25b | 2343 | end if; |
ee6ba406 | 2344 | |
76a1c25b | 2345 | return |
2346 | Make_Subprogram_Body (Loc, | |
aabafdc2 | 2347 | Specification => |
76a1c25b | 2348 | Make_Disp_Asynchronous_Select_Spec (Typ), |
aabafdc2 | 2349 | Declarations => Decls, |
76a1c25b | 2350 | Handled_Statement_Sequence => |
2351 | Make_Handled_Sequence_Of_Statements (Loc, Stmts)); | |
2352 | end Make_Disp_Asynchronous_Select_Body; | |
ee6ba406 | 2353 | |
76a1c25b | 2354 | ---------------------------------------- |
2355 | -- Make_Disp_Asynchronous_Select_Spec -- | |
2356 | ---------------------------------------- | |
ee6ba406 | 2357 | |
76a1c25b | 2358 | function Make_Disp_Asynchronous_Select_Spec |
2359 | (Typ : Entity_Id) return Node_Id | |
2360 | is | |
2361 | Loc : constant Source_Ptr := Sloc (Typ); | |
2362 | Def_Id : constant Node_Id := | |
2363 | Make_Defining_Identifier (Loc, | |
2364 | Name_uDisp_Asynchronous_Select); | |
2365 | Params : constant List_Id := New_List; | |
ee6ba406 | 2366 | |
76a1c25b | 2367 | begin |
68f95949 | 2368 | pragma Assert (not Restriction_Active (No_Dispatching_Calls)); |
2369 | ||
725a69d2 | 2370 | -- T : in out Typ; -- Object parameter |
2371 | -- S : Integer; -- Primitive operation slot | |
2372 | -- P : Address; -- Wrapped parameters | |
2373 | -- B : out Dummy_Communication_Block; -- Communication block dummy | |
2374 | -- F : out Boolean; -- Status flag | |
ee6ba406 | 2375 | |
725a69d2 | 2376 | Append_List_To (Params, New_List ( |
2377 | ||
2378 | Make_Parameter_Specification (Loc, | |
2379 | Defining_Identifier => | |
2380 | Make_Defining_Identifier (Loc, Name_uT), | |
2381 | Parameter_Type => | |
2382 | New_Reference_To (Typ, Loc), | |
2383 | In_Present => True, | |
2384 | Out_Present => True), | |
2385 | ||
2386 | Make_Parameter_Specification (Loc, | |
2387 | Defining_Identifier => | |
2388 | Make_Defining_Identifier (Loc, Name_uS), | |
2389 | Parameter_Type => | |
2390 | New_Reference_To (Standard_Integer, Loc)), | |
2391 | ||
2392 | Make_Parameter_Specification (Loc, | |
2393 | Defining_Identifier => | |
2394 | Make_Defining_Identifier (Loc, Name_uP), | |
2395 | Parameter_Type => | |
2396 | New_Reference_To (RTE (RE_Address), Loc)), | |
2397 | ||
2398 | Make_Parameter_Specification (Loc, | |
2399 | Defining_Identifier => | |
2400 | Make_Defining_Identifier (Loc, Name_uB), | |
2401 | Parameter_Type => | |
2402 | New_Reference_To (RTE (RE_Dummy_Communication_Block), Loc), | |
2403 | Out_Present => True), | |
ee6ba406 | 2404 | |
725a69d2 | 2405 | Make_Parameter_Specification (Loc, |
2406 | Defining_Identifier => | |
2407 | Make_Defining_Identifier (Loc, Name_uF), | |
2408 | Parameter_Type => | |
2409 | New_Reference_To (Standard_Boolean, Loc), | |
2410 | Out_Present => True))); | |
7189d17f | 2411 | |
76a1c25b | 2412 | return |
725a69d2 | 2413 | Make_Procedure_Specification (Loc, |
2414 | Defining_Unit_Name => Def_Id, | |
2415 | Parameter_Specifications => Params); | |
76a1c25b | 2416 | end Make_Disp_Asynchronous_Select_Spec; |
ee6ba406 | 2417 | |
76a1c25b | 2418 | --------------------------------------- |
2419 | -- Make_Disp_Conditional_Select_Body -- | |
2420 | --------------------------------------- | |
ee6ba406 | 2421 | |
cdb1c38f | 2422 | -- For interface types, generate: |
2423 | ||
2424 | -- procedure _Disp_Conditional_Select | |
2425 | -- (T : in out <Typ>; | |
2426 | -- S : Integer; | |
2427 | -- P : System.Address; | |
2428 | -- C : out Ada.Tags.Prim_Op_Kind; | |
2429 | -- F : out Boolean) | |
2430 | -- is | |
2431 | -- begin | |
a053db0d | 2432 | -- F := False; |
2433 | -- C := Ada.Tags.POK_Function; | |
cdb1c38f | 2434 | -- end _Disp_Conditional_Select; |
2435 | ||
2436 | -- For protected types, generate: | |
2437 | ||
2438 | -- procedure _Disp_Conditional_Select | |
2439 | -- (T : in out <Typ>; | |
2440 | -- S : Integer; | |
2441 | -- P : System.Address; | |
2442 | -- C : out Ada.Tags.Prim_Op_Kind; | |
2443 | -- F : out Boolean) | |
2444 | -- is | |
2445 | -- I : Integer; | |
2446 | -- Bnn : System.Tasking.Protected_Objects.Operations. | |
2447 | -- Communication_Block; | |
2448 | ||
2449 | -- begin | |
2450 | -- C := Ada.Tags.Get_Prim_Op_Kind (Ada.Tags.Tag (<Typ>VP, S)); | |
2451 | ||
2452 | -- if C = Ada.Tags.POK_Procedure | |
2453 | -- or else C = Ada.Tags.POK_Protected_Procedure | |
2454 | -- or else C = Ada.Tags.POK_Task_Procedure | |
2455 | -- then | |
2456 | -- F := True; | |
2457 | -- return; | |
2458 | -- end if; | |
2459 | ||
2460 | -- I := Ada.Tags.Get_Entry_Index (Ada.Tags.Tag (<Typ>VP, S)); | |
2461 | -- System.Tasking.Protected_Objects.Operations.Protected_Entry_Call | |
2462 | -- (T.object'Access, | |
2463 | -- System.Tasking.Protected_Objects.Protected_Entry_Index (I), | |
2464 | -- P, | |
2465 | -- System.Tasking.Conditional_Call, | |
2466 | -- Bnn); | |
2467 | -- F := not Cancelled (Bnn); | |
2468 | -- end _Disp_Conditional_Select; | |
2469 | ||
2470 | -- For task types, generate: | |
2471 | ||
2472 | -- procedure _Disp_Conditional_Select | |
2473 | -- (T : in out <Typ>; | |
2474 | -- S : Integer; | |
2475 | -- P : System.Address; | |
2476 | -- C : out Ada.Tags.Prim_Op_Kind; | |
2477 | -- F : out Boolean) | |
2478 | -- is | |
2479 | -- I : Integer; | |
2480 | ||
2481 | -- begin | |
2482 | -- I := Ada.Tags.Get_Entry_Index (Ada.Tags.Tag (<Typ>VP, S)); | |
2483 | -- System.Tasking.Rendezvous.Task_Entry_Call | |
2484 | -- (T._task_id, | |
2485 | -- System.Tasking.Task_Entry_Index (I), | |
2486 | -- P, | |
2487 | -- System.Tasking.Conditional_Call, | |
2488 | -- F); | |
2489 | -- end _Disp_Conditional_Select; | |
2490 | ||
76a1c25b | 2491 | function Make_Disp_Conditional_Select_Body |
2492 | (Typ : Entity_Id) return Node_Id | |
2493 | is | |
2494 | Loc : constant Source_Ptr := Sloc (Typ); | |
2495 | Blk_Nam : Entity_Id; | |
2496 | Conc_Typ : Entity_Id := Empty; | |
2497 | Decls : constant List_Id := New_List; | |
acf97c11 | 2498 | Obj_Ref : Node_Id; |
76a1c25b | 2499 | Stmts : constant List_Id := New_List; |
bf7f5966 | 2500 | Tag_Node : Node_Id; |
ee6ba406 | 2501 | |
76a1c25b | 2502 | begin |
68f95949 | 2503 | pragma Assert (not Restriction_Active (No_Dispatching_Calls)); |
2504 | ||
952af0b9 | 2505 | -- Null body is generated for interface types |
2506 | ||
76a1c25b | 2507 | if Is_Interface (Typ) then |
2508 | return | |
2509 | Make_Subprogram_Body (Loc, | |
2510 | Specification => | |
2511 | Make_Disp_Conditional_Select_Spec (Typ), | |
2512 | Declarations => | |
2513 | No_List, | |
2514 | Handled_Statement_Sequence => | |
2515 | Make_Handled_Sequence_Of_Statements (Loc, | |
a053db0d | 2516 | New_List (Make_Assignment_Statement (Loc, |
aabafdc2 | 2517 | Name => Make_Identifier (Loc, Name_uF), |
a053db0d | 2518 | Expression => New_Reference_To (Standard_False, Loc))))); |
76a1c25b | 2519 | end if; |
ee6ba406 | 2520 | |
952af0b9 | 2521 | if Is_Concurrent_Record_Type (Typ) then |
2522 | Conc_Typ := Corresponding_Concurrent_Type (Typ); | |
ee6ba406 | 2523 | |
76a1c25b | 2524 | -- Generate: |
2525 | -- I : Integer; | |
ee6ba406 | 2526 | |
76a1c25b | 2527 | -- where I will be used to capture the entry index of the primitive |
2528 | -- wrapper at position S. | |
ee6ba406 | 2529 | |
76a1c25b | 2530 | Append_To (Decls, |
2531 | Make_Object_Declaration (Loc, | |
2532 | Defining_Identifier => | |
2533 | Make_Defining_Identifier (Loc, Name_uI), | |
2534 | Object_Definition => | |
2535 | New_Reference_To (Standard_Integer, Loc))); | |
ee6ba406 | 2536 | |
952af0b9 | 2537 | -- Generate: |
cdb1c38f | 2538 | -- C := Ada.Tags.Get_Prim_Op_Kind (Ada.Tags.Tag! (<type>VP), S); |
ee6ba406 | 2539 | |
952af0b9 | 2540 | -- if C = POK_Procedure |
2541 | -- or else C = POK_Protected_Procedure | |
2542 | -- or else C = POK_Task_Procedure; | |
2543 | -- then | |
2544 | -- F := True; | |
2545 | -- return; | |
2546 | -- end if; | |
aad6babd | 2547 | |
e58ae6f1 | 2548 | Build_Common_Dispatching_Select_Statements (Typ, Stmts); |
aad6babd | 2549 | |
76a1c25b | 2550 | -- Generate: |
2551 | -- Bnn : Communication_Block; | |
aad6babd | 2552 | |
cdb1c38f | 2553 | -- where Bnn is the name of the communication block used in the |
2554 | -- call to Protected_Entry_Call. | |
aad6babd | 2555 | |
ec97ce79 | 2556 | Blk_Nam := Make_Temporary (Loc, 'B'); |
76a1c25b | 2557 | Append_To (Decls, |
2558 | Make_Object_Declaration (Loc, | |
2559 | Defining_Identifier => | |
2560 | Blk_Nam, | |
2561 | Object_Definition => | |
2562 | New_Reference_To (RTE (RE_Communication_Block), Loc))); | |
aad6babd | 2563 | |
76a1c25b | 2564 | -- Generate: |
cdb1c38f | 2565 | -- I := Ada.Tags.Get_Entry_Index (Ada.Tags.Tag! (<type>VP), S); |
aad6babd | 2566 | |
76a1c25b | 2567 | -- I is the entry index and S is the dispatch table slot |
aad6babd | 2568 | |
bf7f5966 | 2569 | if Tagged_Type_Expansion then |
2570 | Tag_Node := | |
2571 | Unchecked_Convert_To (RTE (RE_Tag), | |
2572 | New_Reference_To | |
2573 | (Node (First_Elmt (Access_Disp_Table (Typ))), Loc)); | |
2574 | ||
2575 | else | |
2576 | Tag_Node := | |
2577 | Make_Attribute_Reference (Loc, | |
2578 | Prefix => New_Reference_To (Typ, Loc), | |
2579 | Attribute_Name => Name_Tag); | |
2580 | end if; | |
2581 | ||
76a1c25b | 2582 | Append_To (Stmts, |
2583 | Make_Assignment_Statement (Loc, | |
55868293 | 2584 | Name => Make_Identifier (Loc, Name_uI), |
76a1c25b | 2585 | Expression => |
725a69d2 | 2586 | Make_Function_Call (Loc, |
cdb1c38f | 2587 | Name => |
2588 | New_Reference_To (RTE (RE_Get_Entry_Index), Loc), | |
2589 | Parameter_Associations => | |
2590 | New_List ( | |
bf7f5966 | 2591 | Tag_Node, |
cdb1c38f | 2592 | Make_Identifier (Loc, Name_uS))))); |
ee6ba406 | 2593 | |
76a1c25b | 2594 | if Ekind (Conc_Typ) = E_Protected_Type then |
ee6ba406 | 2595 | |
acf97c11 | 2596 | Obj_Ref := -- T._object'Access |
2597 | Make_Attribute_Reference (Loc, | |
2598 | Attribute_Name => Name_Unchecked_Access, | |
2599 | Prefix => | |
2600 | Make_Selected_Component (Loc, | |
2601 | Prefix => Make_Identifier (Loc, Name_uT), | |
2602 | Selector_Name => Make_Identifier (Loc, Name_uObject))); | |
ee6ba406 | 2603 | |
acf97c11 | 2604 | case Corresponding_Runtime_Package (Conc_Typ) is |
2605 | when System_Tasking_Protected_Objects_Entries => | |
2606 | -- Generate: | |
e1c20931 | 2607 | |
acf97c11 | 2608 | -- Protected_Entry_Call |
2609 | -- (T._object'Access, -- Object | |
2610 | -- Protected_Entry_Index! (I), -- E | |
2611 | -- P, -- Uninterpreted_Data | |
2612 | -- Conditional_Call, -- Mode | |
2613 | -- Bnn); -- Block | |
e1c20931 | 2614 | |
acf97c11 | 2615 | -- where T is the protected object, I is the entry index, P |
2616 | -- are the wrapped parameters and Bnn is the name of the | |
2617 | -- communication block. | |
d62940bf | 2618 | |
acf97c11 | 2619 | Append_To (Stmts, |
2620 | Make_Procedure_Call_Statement (Loc, | |
2621 | Name => | |
2622 | New_Reference_To (RTE (RE_Protected_Entry_Call), Loc), | |
2623 | Parameter_Associations => | |
2624 | New_List ( | |
2625 | Obj_Ref, | |
d62940bf | 2626 | |
acf97c11 | 2627 | Make_Unchecked_Type_Conversion (Loc, -- entry index |
2628 | Subtype_Mark => | |
2629 | New_Reference_To | |
2630 | (RTE (RE_Protected_Entry_Index), Loc), | |
2631 | Expression => Make_Identifier (Loc, Name_uI)), | |
2632 | ||
2633 | Make_Identifier (Loc, Name_uP), -- parameter block | |
2634 | ||
2635 | New_Reference_To ( -- Conditional_Call | |
2636 | RTE (RE_Conditional_Call), Loc), | |
2637 | New_Reference_To ( -- Bnn | |
2638 | Blk_Nam, Loc)))); | |
2639 | ||
2640 | when System_Tasking_Protected_Objects_Single_Entry => | |
2641 | ||
2642 | -- If we are compiling for a restricted run-time, the call | |
2643 | -- uses the simpler form. | |
2644 | ||
2645 | Append_To (Stmts, | |
2646 | Make_Procedure_Call_Statement (Loc, | |
2647 | Name => | |
2648 | New_Reference_To | |
2649 | (RTE (RE_Protected_Single_Entry_Call), Loc), | |
2650 | Parameter_Associations => | |
2651 | New_List ( | |
2652 | Obj_Ref, | |
2653 | ||
2654 | Make_Attribute_Reference (Loc, | |
55868293 | 2655 | Prefix => Make_Identifier (Loc, Name_uP), |
acf97c11 | 2656 | Attribute_Name => Name_Address), |
2657 | ||
2658 | New_Reference_To | |
2659 | (RTE (RE_Conditional_Call), Loc)))); | |
2660 | when others => | |
2661 | raise Program_Error; | |
2662 | end case; | |
d62940bf | 2663 | |
76a1c25b | 2664 | -- Generate: |
2665 | -- F := not Cancelled (Bnn); | |
e1c20931 | 2666 | |
76a1c25b | 2667 | -- where F is the success flag. The status of Cancelled is negated |
2668 | -- in order to match the behaviour of the version for task types. | |
e1c20931 | 2669 | |
76a1c25b | 2670 | Append_To (Stmts, |
2671 | Make_Assignment_Statement (Loc, | |
55868293 | 2672 | Name => Make_Identifier (Loc, Name_uF), |
76a1c25b | 2673 | Expression => |
2674 | Make_Op_Not (Loc, | |
2675 | Right_Opnd => | |
2676 | Make_Function_Call (Loc, | |
2677 | Name => | |
2678 | New_Reference_To (RTE (RE_Cancelled), Loc), | |
2679 | Parameter_Associations => | |
2680 | New_List ( | |
2681 | New_Reference_To (Blk_Nam, Loc)))))); | |
2682 | else | |
2683 | pragma Assert (Ekind (Conc_Typ) = E_Task_Type); | |
d62940bf | 2684 | |
76a1c25b | 2685 | -- Generate: |
cdb1c38f | 2686 | -- Task_Entry_Call |
2687 | -- (T._task_id, -- Acceptor | |
2688 | -- Task_Entry_Index! (I), -- E | |
2689 | -- P, -- Uninterpreted_Data | |
2690 | -- Conditional_Call, -- Mode | |
2691 | -- F); -- Rendezvous_Successful | |
d62940bf | 2692 | |
76a1c25b | 2693 | -- where T is the task object, I is the entry index, P are the |
2694 | -- wrapped parameters and F is the status flag. | |
e1c20931 | 2695 | |
76a1c25b | 2696 | Append_To (Stmts, |
2697 | Make_Procedure_Call_Statement (Loc, | |
2698 | Name => | |
2699 | New_Reference_To (RTE (RE_Task_Entry_Call), Loc), | |
2700 | Parameter_Associations => | |
2701 | New_List ( | |
2702 | ||
2703 | Make_Selected_Component (Loc, -- T._task_id | |
55868293 | 2704 | Prefix => Make_Identifier (Loc, Name_uT), |
2705 | Selector_Name => Make_Identifier (Loc, Name_uTask_Id)), | |
76a1c25b | 2706 | |
2707 | Make_Unchecked_Type_Conversion (Loc, -- entry index | |
2708 | Subtype_Mark => | |
2709 | New_Reference_To (RTE (RE_Task_Entry_Index), Loc), | |
55868293 | 2710 | Expression => Make_Identifier (Loc, Name_uI)), |
76a1c25b | 2711 | |
2712 | Make_Identifier (Loc, Name_uP), -- parameter block | |
55868293 | 2713 | New_Reference_To -- Conditional_Call |
2714 | (RTE (RE_Conditional_Call), Loc), | |
76a1c25b | 2715 | Make_Identifier (Loc, Name_uF)))); -- status flag |
d62940bf | 2716 | end if; |
7c949aad | 2717 | |
2718 | else | |
a053db0d | 2719 | -- Initialize out parameters |
7c949aad | 2720 | |
a053db0d | 2721 | Append_To (Stmts, |
2722 | Make_Assignment_Statement (Loc, | |
aabafdc2 | 2723 | Name => Make_Identifier (Loc, Name_uF), |
a053db0d | 2724 | Expression => New_Reference_To (Standard_False, Loc))); |
2725 | Append_To (Stmts, | |
2726 | Make_Assignment_Statement (Loc, | |
aabafdc2 | 2727 | Name => Make_Identifier (Loc, Name_uC), |
a053db0d | 2728 | Expression => New_Reference_To (RTE (RE_POK_Function), Loc))); |
76a1c25b | 2729 | end if; |
2730 | ||
2731 | return | |
2732 | Make_Subprogram_Body (Loc, | |
aabafdc2 | 2733 | Specification => |
76a1c25b | 2734 | Make_Disp_Conditional_Select_Spec (Typ), |
aabafdc2 | 2735 | Declarations => Decls, |
76a1c25b | 2736 | Handled_Statement_Sequence => |
2737 | Make_Handled_Sequence_Of_Statements (Loc, Stmts)); | |
2738 | end Make_Disp_Conditional_Select_Body; | |
2739 | ||
2740 | --------------------------------------- | |
2741 | -- Make_Disp_Conditional_Select_Spec -- | |
2742 | --------------------------------------- | |
2743 | ||
2744 | function Make_Disp_Conditional_Select_Spec | |
2745 | (Typ : Entity_Id) return Node_Id | |
2746 | is | |
2747 | Loc : constant Source_Ptr := Sloc (Typ); | |
2748 | Def_Id : constant Node_Id := | |
2749 | Make_Defining_Identifier (Loc, | |
2750 | Name_uDisp_Conditional_Select); | |
2751 | Params : constant List_Id := New_List; | |
2752 | ||
2753 | begin | |
68f95949 | 2754 | pragma Assert (not Restriction_Active (No_Dispatching_Calls)); |
2755 | ||
725a69d2 | 2756 | -- T : in out Typ; -- Object parameter |
2757 | -- S : Integer; -- Primitive operation slot | |
2758 | -- P : Address; -- Wrapped parameters | |
2759 | -- C : out Prim_Op_Kind; -- Call kind | |
2760 | -- F : out Boolean; -- Status flag | |
2761 | ||
2762 | Append_List_To (Params, New_List ( | |
2763 | ||
2764 | Make_Parameter_Specification (Loc, | |
2765 | Defining_Identifier => | |
2766 | Make_Defining_Identifier (Loc, Name_uT), | |
2767 | Parameter_Type => | |
2768 | New_Reference_To (Typ, Loc), | |
2769 | In_Present => True, | |
2770 | Out_Present => True), | |
2771 | ||
2772 | Make_Parameter_Specification (Loc, | |
2773 | Defining_Identifier => | |
2774 | Make_Defining_Identifier (Loc, Name_uS), | |
2775 | Parameter_Type => | |
2776 | New_Reference_To (Standard_Integer, Loc)), | |
2777 | ||
2778 | Make_Parameter_Specification (Loc, | |
2779 | Defining_Identifier => | |
2780 | Make_Defining_Identifier (Loc, Name_uP), | |
2781 | Parameter_Type => | |
2782 | New_Reference_To (RTE (RE_Address), Loc)), | |
76a1c25b | 2783 | |
725a69d2 | 2784 | Make_Parameter_Specification (Loc, |
2785 | Defining_Identifier => | |
2786 | Make_Defining_Identifier (Loc, Name_uC), | |
2787 | Parameter_Type => | |
2788 | New_Reference_To (RTE (RE_Prim_Op_Kind), Loc), | |
2789 | Out_Present => True), | |
76a1c25b | 2790 | |
725a69d2 | 2791 | Make_Parameter_Specification (Loc, |
2792 | Defining_Identifier => | |
2793 | Make_Defining_Identifier (Loc, Name_uF), | |
2794 | Parameter_Type => | |
2795 | New_Reference_To (Standard_Boolean, Loc), | |
2796 | Out_Present => True))); | |
76a1c25b | 2797 | |
2798 | return | |
2799 | Make_Procedure_Specification (Loc, | |
2800 | Defining_Unit_Name => Def_Id, | |
2801 | Parameter_Specifications => Params); | |
2802 | end Make_Disp_Conditional_Select_Spec; | |
2803 | ||
2804 | ------------------------------------- | |
2805 | -- Make_Disp_Get_Prim_Op_Kind_Body -- | |
2806 | ------------------------------------- | |
2807 | ||
2808 | function Make_Disp_Get_Prim_Op_Kind_Body | |
2809 | (Typ : Entity_Id) return Node_Id | |
2810 | is | |
bf7f5966 | 2811 | Loc : constant Source_Ptr := Sloc (Typ); |
2812 | Tag_Node : Node_Id; | |
76a1c25b | 2813 | |
2814 | begin | |
68f95949 | 2815 | pragma Assert (not Restriction_Active (No_Dispatching_Calls)); |
2816 | ||
76a1c25b | 2817 | if Is_Interface (Typ) then |
2818 | return | |
2819 | Make_Subprogram_Body (Loc, | |
2820 | Specification => | |
2821 | Make_Disp_Get_Prim_Op_Kind_Spec (Typ), | |
2822 | Declarations => | |
2823 | New_List, | |
2824 | Handled_Statement_Sequence => | |
2825 | Make_Handled_Sequence_Of_Statements (Loc, | |
2826 | New_List (Make_Null_Statement (Loc)))); | |
e1c20931 | 2827 | end if; |
2828 | ||
d62940bf | 2829 | -- Generate: |
76a1c25b | 2830 | -- C := get_prim_op_kind (tag! (<type>VP), S); |
ee6ba406 | 2831 | |
76a1c25b | 2832 | -- where C is the out parameter capturing the call kind and S is the |
2833 | -- dispatch table slot number. | |
ee6ba406 | 2834 | |
bf7f5966 | 2835 | if Tagged_Type_Expansion then |
2836 | Tag_Node := | |
2837 | Unchecked_Convert_To (RTE (RE_Tag), | |
2838 | New_Reference_To | |
2839 | (Node (First_Elmt (Access_Disp_Table (Typ))), Loc)); | |
2840 | ||
2841 | else | |
2842 | Tag_Node := | |
2843 | Make_Attribute_Reference (Loc, | |
2844 | Prefix => New_Reference_To (Typ, Loc), | |
2845 | Attribute_Name => Name_Tag); | |
2846 | end if; | |
2847 | ||
76a1c25b | 2848 | return |
2849 | Make_Subprogram_Body (Loc, | |
2850 | Specification => | |
2851 | Make_Disp_Get_Prim_Op_Kind_Spec (Typ), | |
2852 | Declarations => | |
2853 | New_List, | |
2854 | Handled_Statement_Sequence => | |
2855 | Make_Handled_Sequence_Of_Statements (Loc, | |
2856 | New_List ( | |
2857 | Make_Assignment_Statement (Loc, | |
2858 | Name => | |
2859 | Make_Identifier (Loc, Name_uC), | |
2860 | Expression => | |
725a69d2 | 2861 | Make_Function_Call (Loc, |
2862 | Name => | |
2863 | New_Reference_To (RTE (RE_Get_Prim_Op_Kind), Loc), | |
2864 | Parameter_Associations => New_List ( | |
bf7f5966 | 2865 | Tag_Node, |
2866 | Make_Identifier (Loc, Name_uS))))))); | |
76a1c25b | 2867 | end Make_Disp_Get_Prim_Op_Kind_Body; |
e1c20931 | 2868 | |
76a1c25b | 2869 | ------------------------------------- |
2870 | -- Make_Disp_Get_Prim_Op_Kind_Spec -- | |
2871 | ------------------------------------- | |
e1c20931 | 2872 | |
76a1c25b | 2873 | function Make_Disp_Get_Prim_Op_Kind_Spec |
2874 | (Typ : Entity_Id) return Node_Id | |
2875 | is | |
2876 | Loc : constant Source_Ptr := Sloc (Typ); | |
2877 | Def_Id : constant Node_Id := | |
2878 | Make_Defining_Identifier (Loc, | |
2879 | Name_uDisp_Get_Prim_Op_Kind); | |
2880 | Params : constant List_Id := New_List; | |
e1c20931 | 2881 | |
76a1c25b | 2882 | begin |
68f95949 | 2883 | pragma Assert (not Restriction_Active (No_Dispatching_Calls)); |
2884 | ||
725a69d2 | 2885 | -- T : in out Typ; -- Object parameter |
2886 | -- S : Integer; -- Primitive operation slot | |
2887 | -- C : out Prim_Op_Kind; -- Call kind | |
2888 | ||
2889 | Append_List_To (Params, New_List ( | |
2890 | ||
2891 | Make_Parameter_Specification (Loc, | |
2892 | Defining_Identifier => | |
2893 | Make_Defining_Identifier (Loc, Name_uT), | |
2894 | Parameter_Type => | |
2895 | New_Reference_To (Typ, Loc), | |
2896 | In_Present => True, | |
2897 | Out_Present => True), | |
ee6ba406 | 2898 | |
725a69d2 | 2899 | Make_Parameter_Specification (Loc, |
2900 | Defining_Identifier => | |
2901 | Make_Defining_Identifier (Loc, Name_uS), | |
2902 | Parameter_Type => | |
2903 | New_Reference_To (Standard_Integer, Loc)), | |
ee6ba406 | 2904 | |
725a69d2 | 2905 | Make_Parameter_Specification (Loc, |
2906 | Defining_Identifier => | |
2907 | Make_Defining_Identifier (Loc, Name_uC), | |
2908 | Parameter_Type => | |
2909 | New_Reference_To (RTE (RE_Prim_Op_Kind), Loc), | |
2910 | Out_Present => True))); | |
76a1c25b | 2911 | |
2912 | return | |
2913 | Make_Procedure_Specification (Loc, | |
2914 | Defining_Unit_Name => Def_Id, | |
2915 | Parameter_Specifications => Params); | |
2916 | end Make_Disp_Get_Prim_Op_Kind_Spec; | |
2917 | ||
2918 | -------------------------------- | |
2919 | -- Make_Disp_Get_Task_Id_Body -- | |
2920 | -------------------------------- | |
2921 | ||
2922 | function Make_Disp_Get_Task_Id_Body | |
2923 | (Typ : Entity_Id) return Node_Id | |
2924 | is | |
2925 | Loc : constant Source_Ptr := Sloc (Typ); | |
2926 | Ret : Node_Id; | |
2927 | ||
2928 | begin | |
68f95949 | 2929 | pragma Assert (not Restriction_Active (No_Dispatching_Calls)); |
2930 | ||
76a1c25b | 2931 | if Is_Concurrent_Record_Type (Typ) |
2932 | and then Ekind (Corresponding_Concurrent_Type (Typ)) = E_Task_Type | |
2933 | then | |
725a69d2 | 2934 | -- Generate: |
2935 | -- return To_Address (_T._task_id); | |
2936 | ||
76a1c25b | 2937 | Ret := |
17e14451 | 2938 | Make_Simple_Return_Statement (Loc, |
76a1c25b | 2939 | Expression => |
725a69d2 | 2940 | Make_Unchecked_Type_Conversion (Loc, |
2941 | Subtype_Mark => | |
2942 | New_Reference_To (RTE (RE_Address), Loc), | |
2943 | Expression => | |
2944 | Make_Selected_Component (Loc, | |
55868293 | 2945 | Prefix => Make_Identifier (Loc, Name_uT), |
2946 | Selector_Name => Make_Identifier (Loc, Name_uTask_Id)))); | |
76a1c25b | 2947 | |
2948 | -- A null body is constructed for non-task types | |
2949 | ||
2950 | else | |
725a69d2 | 2951 | -- Generate: |
2952 | -- return Null_Address; | |
2953 | ||
76a1c25b | 2954 | Ret := |
17e14451 | 2955 | Make_Simple_Return_Statement (Loc, |
76a1c25b | 2956 | Expression => |
725a69d2 | 2957 | New_Reference_To (RTE (RE_Null_Address), Loc)); |
76a1c25b | 2958 | end if; |
2959 | ||
2960 | return | |
2961 | Make_Subprogram_Body (Loc, | |
2962 | Specification => | |
2963 | Make_Disp_Get_Task_Id_Spec (Typ), | |
2964 | Declarations => | |
2965 | New_List, | |
2966 | Handled_Statement_Sequence => | |
2967 | Make_Handled_Sequence_Of_Statements (Loc, | |
2968 | New_List (Ret))); | |
2969 | end Make_Disp_Get_Task_Id_Body; | |
2970 | ||
2971 | -------------------------------- | |
2972 | -- Make_Disp_Get_Task_Id_Spec -- | |
2973 | -------------------------------- | |
2974 | ||
2975 | function Make_Disp_Get_Task_Id_Spec | |
2976 | (Typ : Entity_Id) return Node_Id | |
2977 | is | |
725a69d2 | 2978 | Loc : constant Source_Ptr := Sloc (Typ); |
76a1c25b | 2979 | |
2980 | begin | |
68f95949 | 2981 | pragma Assert (not Restriction_Active (No_Dispatching_Calls)); |
2982 | ||
76a1c25b | 2983 | return |
2984 | Make_Function_Specification (Loc, | |
725a69d2 | 2985 | Defining_Unit_Name => |
2986 | Make_Defining_Identifier (Loc, Name_uDisp_Get_Task_Id), | |
76a1c25b | 2987 | Parameter_Specifications => New_List ( |
2988 | Make_Parameter_Specification (Loc, | |
2989 | Defining_Identifier => | |
2990 | Make_Defining_Identifier (Loc, Name_uT), | |
2991 | Parameter_Type => | |
2992 | New_Reference_To (Typ, Loc))), | |
2993 | Result_Definition => | |
725a69d2 | 2994 | New_Reference_To (RTE (RE_Address), Loc)); |
76a1c25b | 2995 | end Make_Disp_Get_Task_Id_Spec; |
2996 | ||
cdb1c38f | 2997 | ---------------------------- |
2998 | -- Make_Disp_Requeue_Body -- | |
2999 | ---------------------------- | |
3000 | ||
3001 | function Make_Disp_Requeue_Body | |
3002 | (Typ : Entity_Id) return Node_Id | |
3003 | is | |
3004 | Loc : constant Source_Ptr := Sloc (Typ); | |
3005 | Conc_Typ : Entity_Id := Empty; | |
3006 | Stmts : constant List_Id := New_List; | |
3007 | ||
3008 | begin | |
3009 | pragma Assert (not Restriction_Active (No_Dispatching_Calls)); | |
3010 | ||
3011 | -- Null body is generated for interface types and non-concurrent | |
3012 | -- tagged types. | |
3013 | ||
3014 | if Is_Interface (Typ) | |
3015 | or else not Is_Concurrent_Record_Type (Typ) | |
3016 | then | |
3017 | return | |
3018 | Make_Subprogram_Body (Loc, | |
3019 | Specification => | |
3020 | Make_Disp_Requeue_Spec (Typ), | |
3021 | Declarations => | |
3022 | No_List, | |
3023 | Handled_Statement_Sequence => | |
3024 | Make_Handled_Sequence_Of_Statements (Loc, | |
3025 | New_List (Make_Null_Statement (Loc)))); | |
3026 | end if; | |
3027 | ||
3028 | Conc_Typ := Corresponding_Concurrent_Type (Typ); | |
3029 | ||
3030 | if Ekind (Conc_Typ) = E_Protected_Type then | |
3031 | ||
3032 | -- Generate statements: | |
3033 | -- if F then | |
3034 | -- System.Tasking.Protected_Objects.Operations. | |
3035 | -- Requeue_Protected_Entry | |
3036 | -- (Protection_Entries_Access (P), | |
3037 | -- O._object'Unchecked_Access, | |
3038 | -- Protected_Entry_Index (I), | |
3039 | -- A); | |
3040 | -- else | |
3041 | -- System.Tasking.Protected_Objects.Operations. | |
3042 | -- Requeue_Task_To_Protected_Entry | |
3043 | -- (O._object'Unchecked_Access, | |
3044 | -- Protected_Entry_Index (I), | |
3045 | -- A); | |
3046 | -- end if; | |
3047 | ||
acf97c11 | 3048 | if Restriction_Active (No_Entry_Queue) then |
3049 | Append_To (Stmts, Make_Null_Statement (Loc)); | |
3050 | else | |
3051 | Append_To (Stmts, | |
3052 | Make_If_Statement (Loc, | |
55868293 | 3053 | Condition => Make_Identifier (Loc, Name_uF), |
cdb1c38f | 3054 | |
acf97c11 | 3055 | Then_Statements => |
3056 | New_List ( | |
cdb1c38f | 3057 | |
acf97c11 | 3058 | -- Call to Requeue_Protected_Entry |
cdb1c38f | 3059 | |
acf97c11 | 3060 | Make_Procedure_Call_Statement (Loc, |
3061 | Name => | |
3062 | New_Reference_To ( | |
3063 | RTE (RE_Requeue_Protected_Entry), Loc), | |
3064 | Parameter_Associations => | |
3065 | New_List ( | |
3066 | ||
3067 | Make_Unchecked_Type_Conversion (Loc, -- PEA (P) | |
3068 | Subtype_Mark => | |
3069 | New_Reference_To ( | |
3070 | RTE (RE_Protection_Entries_Access), Loc), | |
3071 | Expression => | |
3072 | Make_Identifier (Loc, Name_uP)), | |
3073 | ||
3074 | Make_Attribute_Reference (Loc, -- O._object'Acc | |
3075 | Attribute_Name => | |
3076 | Name_Unchecked_Access, | |
3077 | Prefix => | |
3078 | Make_Selected_Component (Loc, | |
55868293 | 3079 | Prefix => |
acf97c11 | 3080 | Make_Identifier (Loc, Name_uO), |
3081 | Selector_Name => | |
3082 | Make_Identifier (Loc, Name_uObject))), | |
3083 | ||
3084 | Make_Unchecked_Type_Conversion (Loc, -- entry index | |
3085 | Subtype_Mark => | |
3086 | New_Reference_To ( | |
3087 | RTE (RE_Protected_Entry_Index), Loc), | |
55868293 | 3088 | Expression => Make_Identifier (Loc, Name_uI)), |
cdb1c38f | 3089 | |
acf97c11 | 3090 | Make_Identifier (Loc, Name_uA)))), -- abort status |
cdb1c38f | 3091 | |
acf97c11 | 3092 | Else_Statements => |
3093 | New_List ( | |
cdb1c38f | 3094 | |
acf97c11 | 3095 | -- Call to Requeue_Task_To_Protected_Entry |
cdb1c38f | 3096 | |
acf97c11 | 3097 | Make_Procedure_Call_Statement (Loc, |
3098 | Name => | |
3099 | New_Reference_To ( | |
3100 | RTE (RE_Requeue_Task_To_Protected_Entry), Loc), | |
3101 | Parameter_Associations => | |
3102 | New_List ( | |
3103 | ||
3104 | Make_Attribute_Reference (Loc, -- O._object'Acc | |
3105 | Attribute_Name => | |
3106 | Name_Unchecked_Access, | |
3107 | Prefix => | |
3108 | Make_Selected_Component (Loc, | |
3109 | Prefix => | |
3110 | Make_Identifier (Loc, Name_uO), | |
3111 | Selector_Name => | |
3112 | Make_Identifier (Loc, Name_uObject))), | |
3113 | ||
3114 | Make_Unchecked_Type_Conversion (Loc, -- entry index | |
3115 | Subtype_Mark => | |
3116 | New_Reference_To ( | |
3117 | RTE (RE_Protected_Entry_Index), Loc), | |
3118 | Expression => | |
3119 | Make_Identifier (Loc, Name_uI)), | |
cdb1c38f | 3120 | |
acf97c11 | 3121 | Make_Identifier (Loc, Name_uA)))))); -- abort status |
3122 | end if; | |
cdb1c38f | 3123 | else |
3124 | pragma Assert (Is_Task_Type (Conc_Typ)); | |
3125 | ||
3126 | -- Generate: | |
3127 | -- if F then | |
3128 | -- System.Tasking.Rendezvous.Requeue_Protected_To_Task_Entry | |
3129 | -- (Protection_Entries_Access (P), | |
3130 | -- O._task_id, | |
3131 | -- Task_Entry_Index (I), | |
3132 | -- A); | |
3133 | -- else | |
3134 | -- System.Tasking.Rendezvous.Requeue_Task_Entry | |
3135 | -- (O._task_id, | |
3136 | -- Task_Entry_Index (I), | |
3137 | -- A); | |
3138 | -- end if; | |
3139 | ||
3140 | Append_To (Stmts, | |
3141 | Make_If_Statement (Loc, | |
55868293 | 3142 | Condition => Make_Identifier (Loc, Name_uF), |
cdb1c38f | 3143 | |
55868293 | 3144 | Then_Statements => New_List ( |
cdb1c38f | 3145 | |
55868293 | 3146 | -- Call to Requeue_Protected_To_Task_Entry |
cdb1c38f | 3147 | |
55868293 | 3148 | Make_Procedure_Call_Statement (Loc, |
3149 | Name => | |
3150 | New_Reference_To | |
3151 | (RTE (RE_Requeue_Protected_To_Task_Entry), Loc), | |
cdb1c38f | 3152 | |
55868293 | 3153 | Parameter_Associations => New_List ( |
cdb1c38f | 3154 | |
55868293 | 3155 | Make_Unchecked_Type_Conversion (Loc, -- PEA (P) |
3156 | Subtype_Mark => | |
3157 | New_Reference_To | |
3158 | (RTE (RE_Protection_Entries_Access), Loc), | |
3159 | Expression => Make_Identifier (Loc, Name_uP)), | |
cdb1c38f | 3160 | |
55868293 | 3161 | Make_Selected_Component (Loc, -- O._task_id |
3162 | Prefix => Make_Identifier (Loc, Name_uO), | |
3163 | Selector_Name => Make_Identifier (Loc, Name_uTask_Id)), | |
cdb1c38f | 3164 | |
55868293 | 3165 | Make_Unchecked_Type_Conversion (Loc, -- entry index |
3166 | Subtype_Mark => | |
3167 | New_Reference_To (RTE (RE_Task_Entry_Index), Loc), | |
3168 | Expression => Make_Identifier (Loc, Name_uI)), | |
cdb1c38f | 3169 | |
55868293 | 3170 | Make_Identifier (Loc, Name_uA)))), -- abort status |
cdb1c38f | 3171 | |
55868293 | 3172 | Else_Statements => New_List ( |
cdb1c38f | 3173 | |
55868293 | 3174 | -- Call to Requeue_Task_Entry |
cdb1c38f | 3175 | |
55868293 | 3176 | Make_Procedure_Call_Statement (Loc, |
3177 | Name => New_Reference_To (RTE (RE_Requeue_Task_Entry), Loc), | |
cdb1c38f | 3178 | |
55868293 | 3179 | Parameter_Associations => New_List ( |
cdb1c38f | 3180 | |
55868293 | 3181 | Make_Selected_Component (Loc, -- O._task_id |
3182 | Prefix => Make_Identifier (Loc, Name_uO), | |
3183 | Selector_Name => Make_Identifier (Loc, Name_uTask_Id)), | |
cdb1c38f | 3184 | |
55868293 | 3185 | Make_Unchecked_Type_Conversion (Loc, -- entry index |
3186 | Subtype_Mark => | |
3187 | New_Reference_To (RTE (RE_Task_Entry_Index), Loc), | |
3188 | Expression => Make_Identifier (Loc, Name_uI)), | |
cdb1c38f | 3189 | |
55868293 | 3190 | Make_Identifier (Loc, Name_uA)))))); -- abort status |
cdb1c38f | 3191 | end if; |
3192 | ||
3193 | -- Even though no declarations are needed in both cases, we allocate | |
3194 | -- a list for entities added by Freeze. | |
3195 | ||
3196 | return | |
3197 | Make_Subprogram_Body (Loc, | |
3198 | Specification => | |
3199 | Make_Disp_Requeue_Spec (Typ), | |
3200 | Declarations => | |
3201 | New_List, | |
3202 | Handled_Statement_Sequence => | |
3203 | Make_Handled_Sequence_Of_Statements (Loc, Stmts)); | |
3204 | end Make_Disp_Requeue_Body; | |
3205 | ||
3206 | ---------------------------- | |
3207 | -- Make_Disp_Requeue_Spec -- | |
3208 | ---------------------------- | |
3209 | ||
3210 | function Make_Disp_Requeue_Spec | |
3211 | (Typ : Entity_Id) return Node_Id | |
3212 | is | |
3213 | Loc : constant Source_Ptr := Sloc (Typ); | |
3214 | ||
3215 | begin | |
3216 | pragma Assert (not Restriction_Active (No_Dispatching_Calls)); | |
3217 | ||
3218 | -- O : in out Typ; - Object parameter | |
3219 | -- F : Boolean; - Protected (True) / task (False) flag | |
3220 | -- P : Address; - Protection_Entries_Access value | |
3221 | -- I : Entry_Index - Index of entry call | |
3222 | -- A : Boolean - Abort flag | |
3223 | ||
3224 | -- Note that the Protection_Entries_Access value is represented as a | |
3225 | -- System.Address in order to avoid dragging in the tasking runtime | |
3226 | -- when compiling sources without tasking constructs. | |
3227 | ||
3228 | return | |
3229 | Make_Procedure_Specification (Loc, | |
3230 | Defining_Unit_Name => | |
3231 | Make_Defining_Identifier (Loc, Name_uDisp_Requeue), | |
3232 | ||
3233 | Parameter_Specifications => | |
3234 | New_List ( | |
3235 | ||
3236 | Make_Parameter_Specification (Loc, -- O | |
3237 | Defining_Identifier => | |
3238 | Make_Defining_Identifier (Loc, Name_uO), | |
3239 | Parameter_Type => | |
3240 | New_Reference_To (Typ, Loc), | |
3241 | In_Present => True, | |
3242 | Out_Present => True), | |
3243 | ||
3244 | Make_Parameter_Specification (Loc, -- F | |
3245 | Defining_Identifier => | |
3246 | Make_Defining_Identifier (Loc, Name_uF), | |
3247 | Parameter_Type => | |
3248 | New_Reference_To (Standard_Boolean, Loc)), | |
3249 | ||
3250 | Make_Parameter_Specification (Loc, -- P | |
3251 | Defining_Identifier => | |
3252 | Make_Defining_Identifier (Loc, Name_uP), | |
3253 | Parameter_Type => | |
3254 | New_Reference_To (RTE (RE_Address), Loc)), | |
3255 | ||
3256 | Make_Parameter_Specification (Loc, -- I | |
3257 | Defining_Identifier => | |
3258 | Make_Defining_Identifier (Loc, Name_uI), | |
3259 | Parameter_Type => | |
3260 | New_Reference_To (Standard_Integer, Loc)), | |
3261 | ||
3262 | Make_Parameter_Specification (Loc, -- A | |
3263 | Defining_Identifier => | |
3264 | Make_Defining_Identifier (Loc, Name_uA), | |
3265 | Parameter_Type => | |
3266 | New_Reference_To (Standard_Boolean, Loc)))); | |
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, | |
3366 | Specification => | |
3367 | Make_Disp_Timed_Select_Spec (Typ), | |
3368 | Declarations => | |
3369 | New_List, | |
3370 | Handled_Statement_Sequence => | |
3371 | Make_Handled_Sequence_Of_Statements (Loc, | |
aabafdc2 | 3372 | New_List ( |
3373 | Make_Assignment_Statement (Loc, | |
3374 | Name => Make_Identifier (Loc, Name_uF), | |
3375 | Expression => New_Reference_To (Standard_False, Loc))))); | |
76a1c25b | 3376 | end if; |
3377 | ||
952af0b9 | 3378 | if Is_Concurrent_Record_Type (Typ) then |
3379 | Conc_Typ := Corresponding_Concurrent_Type (Typ); | |
76a1c25b | 3380 | |
3381 | -- Generate: | |
3382 | -- I : Integer; | |
3383 | ||
3384 | -- where I will be used to capture the entry index of the primitive | |
3385 | -- wrapper at position S. | |
3386 | ||
3387 | Append_To (Decls, | |
3388 | Make_Object_Declaration (Loc, | |
aabafdc2 | 3389 | Defining_Identifier => Make_Defining_Identifier (Loc, Name_uI), |
3390 | Object_Definition => New_Reference_To (Standard_Integer, Loc))); | |
76a1c25b | 3391 | |
952af0b9 | 3392 | -- Generate: |
3393 | -- C := Get_Prim_Op_Kind (tag! (<type>VP), S); | |
76a1c25b | 3394 | |
952af0b9 | 3395 | -- if C = POK_Procedure |
3396 | -- or else C = POK_Protected_Procedure | |
3397 | -- or else C = POK_Task_Procedure; | |
3398 | -- then | |
3399 | -- F := True; | |
3400 | -- return; | |
3401 | -- end if; | |
76a1c25b | 3402 | |
e58ae6f1 | 3403 | Build_Common_Dispatching_Select_Statements (Typ, Stmts); |
76a1c25b | 3404 | |
3405 | -- Generate: | |
952af0b9 | 3406 | -- I := Get_Entry_Index (tag! (<type>VP), S); |
76a1c25b | 3407 | |
3408 | -- I is the entry index and S is the dispatch table slot | |
3409 | ||
bf7f5966 | 3410 | if Tagged_Type_Expansion then |
3411 | Tag_Node := | |
3412 | Unchecked_Convert_To (RTE (RE_Tag), | |
3413 | New_Reference_To | |
3414 | (Node (First_Elmt (Access_Disp_Table (Typ))), Loc)); | |
3415 | ||
3416 | else | |
3417 | Tag_Node := | |
3418 | Make_Attribute_Reference (Loc, | |
aabafdc2 | 3419 | Prefix => New_Reference_To (Typ, Loc), |
bf7f5966 | 3420 | Attribute_Name => Name_Tag); |
3421 | end if; | |
3422 | ||
76a1c25b | 3423 | Append_To (Stmts, |
3424 | Make_Assignment_Statement (Loc, | |
55868293 | 3425 | Name => Make_Identifier (Loc, Name_uI), |
76a1c25b | 3426 | Expression => |
725a69d2 | 3427 | Make_Function_Call (Loc, |
aabafdc2 | 3428 | Name => New_Reference_To (RTE (RE_Get_Entry_Index), Loc), |
cdb1c38f | 3429 | Parameter_Associations => |
3430 | New_List ( | |
bf7f5966 | 3431 | Tag_Node, |
cdb1c38f | 3432 | Make_Identifier (Loc, Name_uS))))); |
76a1c25b | 3433 | |
acf97c11 | 3434 | -- Protected case |
3435 | ||
76a1c25b | 3436 | if Ekind (Conc_Typ) = E_Protected_Type then |
3437 | ||
acf97c11 | 3438 | -- Build T._object'Access |
3439 | ||
3440 | Obj_Ref := | |
3441 | Make_Attribute_Reference (Loc, | |
3442 | Attribute_Name => Name_Unchecked_Access, | |
3443 | Prefix => | |
3444 | Make_Selected_Component (Loc, | |
3445 | Prefix => Make_Identifier (Loc, Name_uT), | |
3446 | Selector_Name => Make_Identifier (Loc, Name_uObject))); | |
3447 | ||
3448 | -- Normal case, No_Entry_Queue restriction not active. In this | |
3449 | -- case we generate: | |
3450 | ||
3451 | -- Timed_Protected_Entry_Call | |
3452 | -- (T._object'access, | |
cdb1c38f | 3453 | -- Protected_Entry_Index! (I), |
acf97c11 | 3454 | -- P, D, M, F); |
76a1c25b | 3455 | |
3456 | -- where T is the protected object, I is the entry index, P are | |
3457 | -- the wrapped parameters, D is the delay amount, M is the delay | |
3458 | -- mode and F is the status flag. | |
3459 | ||
acf97c11 | 3460 | case Corresponding_Runtime_Package (Conc_Typ) is |
3461 | when System_Tasking_Protected_Objects_Entries => | |
3462 | Append_To (Stmts, | |
3463 | Make_Procedure_Call_Statement (Loc, | |
3464 | Name => | |
3465 | New_Reference_To | |
3466 | (RTE (RE_Timed_Protected_Entry_Call), Loc), | |
3467 | Parameter_Associations => | |
3468 | New_List ( | |
3469 | Obj_Ref, | |
3470 | ||
3471 | Make_Unchecked_Type_Conversion (Loc, -- entry index | |
3472 | Subtype_Mark => | |
3473 | New_Reference_To | |
3474 | (RTE (RE_Protected_Entry_Index), Loc), | |
3475 | Expression => | |
3476 | Make_Identifier (Loc, Name_uI)), | |
76a1c25b | 3477 | |
acf97c11 | 3478 | Make_Identifier (Loc, Name_uP), -- parameter block |
3479 | Make_Identifier (Loc, Name_uD), -- delay | |
3480 | Make_Identifier (Loc, Name_uM), -- delay mode | |
3481 | Make_Identifier (Loc, Name_uF)))); -- status flag | |
76a1c25b | 3482 | |
acf97c11 | 3483 | when System_Tasking_Protected_Objects_Single_Entry => |
3484 | -- Generate: | |
76a1c25b | 3485 | |
acf97c11 | 3486 | -- Timed_Protected_Single_Entry_Call |
3487 | -- (T._object'access, P, D, M, F); | |
3488 | ||
3489 | -- where T is the protected object, P is the wrapped | |
3490 | -- parameters, D is the delay amount, M is the delay mode, F | |
3491 | -- is the status flag. | |
3492 | ||
3493 | Append_To (Stmts, | |
3494 | Make_Procedure_Call_Statement (Loc, | |
3495 | Name => | |
3496 | New_Reference_To | |
3497 | (RTE (RE_Timed_Protected_Single_Entry_Call), Loc), | |
3498 | Parameter_Associations => | |
3499 | New_List ( | |
3500 | Obj_Ref, | |
3501 | Make_Identifier (Loc, Name_uP), -- parameter block | |
3502 | Make_Identifier (Loc, Name_uD), -- delay | |
3503 | Make_Identifier (Loc, Name_uM), -- delay mode | |
3504 | Make_Identifier (Loc, Name_uF)))); -- status flag | |
3505 | ||
3506 | when others => | |
3507 | raise Program_Error; | |
3508 | end case; | |
3509 | ||
3510 | -- Task case | |
ee6ba406 | 3511 | |
ee6ba406 | 3512 | else |
76a1c25b | 3513 | pragma Assert (Ekind (Conc_Typ) = E_Task_Type); |
3514 | ||
3515 | -- Generate: | |
3516 | -- Timed_Task_Entry_Call ( | |
3517 | -- T._task_id, | |
cdb1c38f | 3518 | -- Task_Entry_Index! (I), |
76a1c25b | 3519 | -- P, |
3520 | -- D, | |
3521 | -- M, | |
3522 | -- F); | |
3523 | ||
3524 | -- where T is the task object, I is the entry index, P are the | |
3525 | -- wrapped parameters, D is the delay amount, M is the delay | |
3526 | -- mode and F is the status flag. | |
3527 | ||
3528 | Append_To (Stmts, | |
3529 | Make_Procedure_Call_Statement (Loc, | |
3530 | Name => | |
3531 | New_Reference_To (RTE (RE_Timed_Task_Entry_Call), Loc), | |
3532 | Parameter_Associations => | |
3533 | New_List ( | |
3534 | ||
3535 | Make_Selected_Component (Loc, -- T._task_id | |
55868293 | 3536 | Prefix => Make_Identifier (Loc, Name_uT), |
3537 | Selector_Name => Make_Identifier (Loc, Name_uTask_Id)), | |
76a1c25b | 3538 | |
3539 | Make_Unchecked_Type_Conversion (Loc, -- entry index | |
3540 | Subtype_Mark => | |
3541 | New_Reference_To (RTE (RE_Task_Entry_Index), Loc), | |
55868293 | 3542 | Expression => Make_Identifier (Loc, Name_uI)), |
76a1c25b | 3543 | |
3544 | Make_Identifier (Loc, Name_uP), -- parameter block | |
3545 | Make_Identifier (Loc, Name_uD), -- delay | |
3546 | Make_Identifier (Loc, Name_uM), -- delay mode | |
3547 | Make_Identifier (Loc, Name_uF)))); -- status flag | |
ee6ba406 | 3548 | end if; |
7c949aad | 3549 | |
3550 | else | |
a053db0d | 3551 | -- Initialize out parameters |
7c949aad | 3552 | |
a053db0d | 3553 | Append_To (Stmts, |
3554 | Make_Assignment_Statement (Loc, | |
aabafdc2 | 3555 | Name => Make_Identifier (Loc, Name_uF), |
a053db0d | 3556 | Expression => New_Reference_To (Standard_False, Loc))); |
3557 | Append_To (Stmts, | |
3558 | Make_Assignment_Statement (Loc, | |
aabafdc2 | 3559 | Name => Make_Identifier (Loc, Name_uC), |
a053db0d | 3560 | Expression => New_Reference_To (RTE (RE_POK_Function), Loc))); |
76a1c25b | 3561 | end if; |
3562 | ||
3563 | return | |
3564 | Make_Subprogram_Body (Loc, | |
aabafdc2 | 3565 | Specification => Make_Disp_Timed_Select_Spec (Typ), |
3566 | Declarations => Decls, | |
76a1c25b | 3567 | Handled_Statement_Sequence => |
3568 | Make_Handled_Sequence_Of_Statements (Loc, Stmts)); | |
3569 | end Make_Disp_Timed_Select_Body; | |
3570 | ||
3571 | --------------------------------- | |
3572 | -- Make_Disp_Timed_Select_Spec -- | |
3573 | --------------------------------- | |
3574 | ||
3575 | function Make_Disp_Timed_Select_Spec | |
3576 | (Typ : Entity_Id) return Node_Id | |
3577 | is | |
3578 | Loc : constant Source_Ptr := Sloc (Typ); | |
3579 | Def_Id : constant Node_Id := | |
3580 | Make_Defining_Identifier (Loc, | |
3581 | Name_uDisp_Timed_Select); | |
3582 | Params : constant List_Id := New_List; | |
ee6ba406 | 3583 | |
76a1c25b | 3584 | begin |
68f95949 | 3585 | pragma Assert (not Restriction_Active (No_Dispatching_Calls)); |
3586 | ||
725a69d2 | 3587 | -- T : in out Typ; -- Object parameter |
3588 | -- S : Integer; -- Primitive operation slot | |
3589 | -- P : Address; -- Wrapped parameters | |
3590 | -- D : Duration; -- Delay | |
3591 | -- M : Integer; -- Delay Mode | |
3592 | -- C : out Prim_Op_Kind; -- Call kind | |
3593 | -- F : out Boolean; -- Status flag | |
76a1c25b | 3594 | |
725a69d2 | 3595 | Append_List_To (Params, New_List ( |
3596 | ||
3597 | Make_Parameter_Specification (Loc, | |
3598 | Defining_Identifier => | |
3599 | Make_Defining_Identifier (Loc, Name_uT), | |
3600 | Parameter_Type => | |
3601 | New_Reference_To (Typ, Loc), | |
3602 | In_Present => True, | |
3603 | Out_Present => True), | |
3604 | ||
3605 | Make_Parameter_Specification (Loc, | |
3606 | Defining_Identifier => | |
3607 | Make_Defining_Identifier (Loc, Name_uS), | |
3608 | Parameter_Type => | |
3609 | New_Reference_To (Standard_Integer, Loc)), | |
3610 | ||
3611 | Make_Parameter_Specification (Loc, | |
3612 | Defining_Identifier => | |
3613 | Make_Defining_Identifier (Loc, Name_uP), | |
3614 | Parameter_Type => | |
3615 | New_Reference_To (RTE (RE_Address), Loc)), | |
76a1c25b | 3616 | |
76a1c25b | 3617 | Make_Parameter_Specification (Loc, |
3618 | Defining_Identifier => | |
3619 | Make_Defining_Identifier (Loc, Name_uD), | |
3620 | Parameter_Type => | |
725a69d2 | 3621 | New_Reference_To (Standard_Duration, Loc)), |
76a1c25b | 3622 | |
76a1c25b | 3623 | Make_Parameter_Specification (Loc, |
3624 | Defining_Identifier => | |
3625 | Make_Defining_Identifier (Loc, Name_uM), | |
3626 | Parameter_Type => | |
725a69d2 | 3627 | New_Reference_To (Standard_Integer, Loc)), |
ee6ba406 | 3628 | |
725a69d2 | 3629 | Make_Parameter_Specification (Loc, |
3630 | Defining_Identifier => | |
3631 | Make_Defining_Identifier (Loc, Name_uC), | |
3632 | Parameter_Type => | |
3633 | New_Reference_To (RTE (RE_Prim_Op_Kind), Loc), | |
3634 | Out_Present => True))); | |
ee6ba406 | 3635 | |
725a69d2 | 3636 | Append_To (Params, |
3637 | Make_Parameter_Specification (Loc, | |
3638 | Defining_Identifier => | |
3639 | Make_Defining_Identifier (Loc, Name_uF), | |
3640 | Parameter_Type => | |
3641 | New_Reference_To (Standard_Boolean, Loc), | |
3642 | Out_Present => True)); | |
ee6ba406 | 3643 | |
76a1c25b | 3644 | return |
3645 | Make_Procedure_Specification (Loc, | |
3646 | Defining_Unit_Name => Def_Id, | |
3647 | Parameter_Specifications => Params); | |
3648 | end Make_Disp_Timed_Select_Spec; | |
ee6ba406 | 3649 | |
76a1c25b | 3650 | ------------- |
3651 | -- Make_DT -- | |
3652 | ------------- | |
ee6ba406 | 3653 | |
725a69d2 | 3654 | -- The frontend supports two models for expanding dispatch tables |
3655 | -- associated with library-level defined tagged types: statically | |
3656 | -- and non-statically allocated dispatch tables. In the former case | |
3657 | -- the object containing the dispatch table is constant and it is | |
3658 | -- initialized by means of a positional aggregate. In the latter case, | |
3659 | -- the object containing the dispatch table is a variable which is | |
3660 | -- initialized by means of assignments. | |
3661 | ||
3662 | -- In case of locally defined tagged types, the object containing the | |
3663 | -- object containing the dispatch table is always a variable (instead | |
3664 | -- of a constant). This is currently required to give support to late | |
3665 | -- overriding of primitives. For example: | |
3666 | ||
3667 | -- procedure Example is | |
3668 | -- package Pkg is | |
3669 | -- type T1 is tagged null record; | |
3670 | -- procedure Prim (O : T1); | |
3671 | -- end Pkg; | |
3672 | ||
3673 | -- type T2 is new Pkg.T1 with null record; | |
3674 | -- procedure Prim (X : T2) is -- late overriding | |
3675 | -- begin | |
3676 | -- ... | |
3677 | -- ... | |
3678 | -- end; | |
952af0b9 | 3679 | |
17e14451 | 3680 | function Make_DT (Typ : Entity_Id; N : Node_Id := Empty) return List_Id is |
3681 | Loc : constant Source_Ptr := Sloc (Typ); | |
3682 | ||
725a69d2 | 3683 | Max_Predef_Prims : constant Int := |
3684 | UI_To_Int | |
3685 | (Intval | |
3686 | (Expression | |
17e14451 | 3687 | (Parent (RTE (RE_Max_Predef_Prims))))); |
3688 | ||
cc60bd16 | 3689 | DT_Decl : constant Elist_Id := New_Elmt_List; |
3690 | DT_Aggr : constant Elist_Id := New_Elmt_List; | |
3691 | -- Entities marked with attribute Is_Dispatch_Table_Entity | |
3692 | ||
349db231 | 3693 | procedure Check_Premature_Freezing |
3694 | (Subp : Entity_Id; | |
3695 | Tagged_Type : Entity_Id; | |
3696 | Typ : Entity_Id); | |
17e14451 | 3697 | -- Verify that all non-tagged types in the profile of a subprogram |
3698 | -- are frozen at the point the subprogram is frozen. This enforces | |
3699 | -- the rule on RM 13.14 (14) as modified by AI05-019. At the point a | |
3700 | -- subprogram is frozen, enough must be known about it to build the | |
3701 | -- activation record for it, which requires at least that the size of | |
3702 | -- all parameters be known. Controlling arguments are by-reference, | |
3703 | -- and therefore the rule only applies to non-tagged types. | |
3704 | -- Typical violation of the rule involves an object declaration that | |
3705 | -- freezes a tagged type, when one of its primitive operations has a | |
3706 | -- type in its profile whose full view has not been analyzed yet. | |
349db231 | 3707 | -- More complex cases involve composite types that have one private |
3708 | -- unfrozen subcomponent. | |
725a69d2 | 3709 | |
f301a57b | 3710 | procedure Export_DT (Typ : Entity_Id; DT : Entity_Id; Index : Nat := 0); |
3711 | -- Export the dispatch table DT of tagged type Typ. Required to generate | |
3712 | -- forward references and statically allocate the table. For primary | |
3713 | -- dispatch tables Index is 0; for secondary dispatch tables the value | |
3714 | -- of index must match the Suffix_Index value assigned to the table by | |
3715 | -- Make_Tags when generating its unique external name, and it is used to | |
3716 | -- retrieve from the Dispatch_Table_Wrappers list associated with Typ | |
3717 | -- the external name generated by Import_DT. | |
24971415 | 3718 | |
725a69d2 | 3719 | procedure Make_Secondary_DT |
acf97c11 | 3720 | (Typ : Entity_Id; |
3721 | Iface : Entity_Id; | |
f301a57b | 3722 | Suffix_Index : Int; |
acf97c11 | 3723 | Num_Iface_Prims : Nat; |
3724 | Iface_DT_Ptr : Entity_Id; | |
3725 | Predef_Prims_Ptr : Entity_Id; | |
3726 | Build_Thunks : Boolean; | |
3727 | Result : List_Id); | |
cdb1c38f | 3728 | -- Ada 2005 (AI-251): Expand the declarations for a Secondary Dispatch |
3729 | -- Table of Typ associated with Iface. Each abstract interface of Typ | |
3730 | -- has two secondary dispatch tables: one containing pointers to thunks | |
3731 | -- and another containing pointers to the primitives covering the | |
3732 | -- interface primitives. The former secondary table is generated when | |
3733 | -- Build_Thunks is True, and provides common support for dispatching | |
3734 | -- calls through interface types; the latter secondary table is | |
3735 | -- generated when Build_Thunks is False, and provides support for | |
3736 | -- Generic Dispatching Constructors that dispatch calls through | |
278c67dc | 3737 | -- interface types. When constructing this latter table the value of |
3738 | -- Suffix_Index is -1 to indicate that there is no need to export such | |
3739 | -- table when building statically allocated dispatch tables; a positive | |
3740 | -- value of Suffix_Index must match the Suffix_Index value assigned to | |
3741 | -- this secondary dispatch table by Make_Tags when its unique external | |
3742 | -- name was generated. | |
9dfe12ae | 3743 | |
17e14451 | 3744 | ------------------------------ |
3745 | -- Check_Premature_Freezing -- | |
3746 | ------------------------------ | |
3747 | ||
349db231 | 3748 | procedure Check_Premature_Freezing |
3749 | (Subp : Entity_Id; | |
3750 | Tagged_Type : Entity_Id; | |
3751 | Typ : Entity_Id) | |
3752 | is | |
3753 | Comp : Entity_Id; | |
aada9bb5 | 3754 | |
3755 | function Is_Actual_For_Formal_Incomplete_Type | |
3756 | (T : Entity_Id) return Boolean; | |
65a805b2 | 3757 | -- In Ada 2012, if a nested generic has an incomplete formal type, |
3758 | -- the actual may be (and usually is) a private type whose completion | |
5f8e1c78 | 3759 | -- appears later. It is safe to build the dispatch table in this |
3760 | -- case, gigi will have full views available. | |
3761 | ||
3762 | ------------------------------------------ | |
3763 | -- Is_Actual_For_Formal_Incomplete_Type -- | |
3764 | ------------------------------------------ | |
3765 | ||
aada9bb5 | 3766 | function Is_Actual_For_Formal_Incomplete_Type |
3767 | (T : Entity_Id) return Boolean | |
5f8e1c78 | 3768 | is |
3769 | Gen_Par : Entity_Id; | |
3770 | F : Node_Id; | |
aada9bb5 | 3771 | |
5f8e1c78 | 3772 | begin |
3773 | if not Is_Generic_Instance (Current_Scope) | |
3774 | or else not Used_As_Generic_Actual (T) | |
3775 | then | |
3776 | return False; | |
3777 | ||
3778 | else | |
3779 | Gen_Par := Generic_Parent (Parent (Current_Scope)); | |
3780 | end if; | |
3781 | ||
3782 | F := | |
3783 | First | |
3784 | (Generic_Formal_Declarations | |
3785 | (Unit_Declaration_Node (Gen_Par))); | |
3786 | while Present (F) loop | |
3787 | if Ekind (Defining_Identifier (F)) = E_Incomplete_Type then | |
3788 | return True; | |
3789 | end if; | |
3790 | ||
3791 | Next (F); | |
3792 | end loop; | |
3793 | ||
3794 | return False; | |
3795 | end Is_Actual_For_Formal_Incomplete_Type; | |
278c67dc | 3796 | |
aada9bb5 | 3797 | -- Start of processing for Check_Premature_Freezing |
3798 | ||
17e14451 | 3799 | begin |
496b8337 | 3800 | -- Note that if the type is a (subtype of) a generic actual, the |
3801 | -- actual will have been frozen by the instantiation. | |
3802 | ||
17e14451 | 3803 | if Present (N) |
349db231 | 3804 | and then Is_Private_Type (Typ) |
17e14451 | 3805 | and then No (Full_View (Typ)) |
3806 | and then not Is_Generic_Type (Typ) | |
3807 | and then not Is_Tagged_Type (Typ) | |
3808 | and then not Is_Frozen (Typ) | |
496b8337 | 3809 | and then not Is_Generic_Actual_Type (Typ) |
17e14451 | 3810 | then |
3811 | Error_Msg_Sloc := Sloc (Subp); | |
503f7fd3 | 3812 | Error_Msg_NE |
17e14451 | 3813 | ("declaration must appear after completion of type &", N, Typ); |
3814 | Error_Msg_NE | |
3815 | ("\which is an untagged type in the profile of" | |
349db231 | 3816 | & " primitive operation & declared#", N, Subp); |
3817 | ||
3818 | else | |
3819 | Comp := Private_Component (Typ); | |
3820 | ||
3821 | if not Is_Tagged_Type (Typ) | |
3822 | and then Present (Comp) | |
3823 | and then not Is_Frozen (Comp) | |
5f8e1c78 | 3824 | and then |
aada9bb5 | 3825 | not Is_Actual_For_Formal_Incomplete_Type (Comp) |
349db231 | 3826 | then |
3827 | Error_Msg_Sloc := Sloc (Subp); | |
3828 | Error_Msg_Node_2 := Subp; | |
3829 | Error_Msg_Name_1 := Chars (Tagged_Type); | |
3830 | Error_Msg_NE | |
3831 | ("declaration must appear after completion of type &", | |
3832 | N, Comp); | |
3833 | Error_Msg_NE | |
3834 | ("\which is a component of untagged type& in the profile of" | |
3835 | & " primitive & of type % that is frozen by the declaration ", | |
3836 | N, Typ); | |
3837 | end if; | |
17e14451 | 3838 | end if; |
3839 | end Check_Premature_Freezing; | |
3840 | ||
24971415 | 3841 | --------------- |
3842 | -- Export_DT -- | |
3843 | --------------- | |
3844 | ||
f301a57b | 3845 | procedure Export_DT (Typ : Entity_Id; DT : Entity_Id; Index : Nat := 0) |
3846 | is | |
3847 | Count : Nat; | |
3848 | Elmt : Elmt_Id; | |
3849 | ||
24971415 | 3850 | begin |
3851 | Set_Is_Statically_Allocated (DT); | |
3852 | Set_Is_True_Constant (DT); | |
3853 | Set_Is_Exported (DT); | |
3854 | ||
f301a57b | 3855 | Count := 0; |
3856 | Elmt := First_Elmt (Dispatch_Table_Wrappers (Typ)); | |
3857 | while Count /= Index loop | |
3858 | Next_Elmt (Elmt); | |
3859 | Count := Count + 1; | |
3860 | end loop; | |
3861 | ||
3862 | pragma Assert (Related_Type (Node (Elmt)) = Typ); | |
3863 | ||
3864 | Get_External_Name | |
3865 | (Entity => Node (Elmt), | |
3866 | Has_Suffix => True); | |
3867 | ||
24971415 | 3868 | Set_Interface_Name (DT, |
3869 | Make_String_Literal (Loc, | |
3870 | Strval => String_From_Name_Buffer)); | |
3871 | ||
3872 | -- Ensure proper Sprint output of this implicit importation | |
3873 | ||
3874 | Set_Is_Internal (DT); | |
3875 | Set_Is_Public (DT); | |
3876 | end Export_DT; | |
3877 | ||
725a69d2 | 3878 | ----------------------- |
3879 | -- Make_Secondary_DT -- | |
3880 | ----------------------- | |
ee6ba406 | 3881 | |
725a69d2 | 3882 | procedure Make_Secondary_DT |
acf97c11 | 3883 | (Typ : Entity_Id; |
3884 | Iface : Entity_Id; | |
f301a57b | 3885 | Suffix_Index : Int; |
acf97c11 | 3886 | Num_Iface_Prims : Nat; |
3887 | Iface_DT_Ptr : Entity_Id; | |
3888 | Predef_Prims_Ptr : Entity_Id; | |
3889 | Build_Thunks : Boolean; | |
3890 | Result : List_Id) | |
725a69d2 | 3891 | is |
3892 | Loc : constant Source_Ptr := Sloc (Typ); | |
f301a57b | 3893 | Exporting_Table : constant Boolean := |
3894 | Building_Static_DT (Typ) | |
3895 | and then Suffix_Index > 0; | |
ec97ce79 | 3896 | Iface_DT : constant Entity_Id := Make_Temporary (Loc, 'T'); |
3897 | Predef_Prims : constant Entity_Id := Make_Temporary (Loc, 'R'); | |
725a69d2 | 3898 | DT_Constr_List : List_Id; |
3899 | DT_Aggr_List : List_Id; | |
3900 | Empty_DT : Boolean := False; | |
3901 | Nb_Predef_Prims : Nat := 0; | |
3902 | Nb_Prim : Nat; | |
3903 | New_Node : Node_Id; | |
3904 | OSD : Entity_Id; | |
3905 | OSD_Aggr_List : List_Id; | |
3906 | Pos : Nat; | |
3907 | Prim : Entity_Id; | |
3908 | Prim_Elmt : Elmt_Id; | |
3909 | Prim_Ops_Aggr_List : List_Id; | |
343d35dc | 3910 | |
725a69d2 | 3911 | begin |
17e14451 | 3912 | -- Handle cases in which we do not generate statically allocated |
3913 | -- dispatch tables. | |
343d35dc | 3914 | |
24971415 | 3915 | if not Building_Static_DT (Typ) then |
725a69d2 | 3916 | Set_Ekind (Predef_Prims, E_Variable); |
725a69d2 | 3917 | Set_Ekind (Iface_DT, E_Variable); |
343d35dc | 3918 | |
725a69d2 | 3919 | -- Statically allocated dispatch tables and related entities are |
3920 | -- constants. | |
343d35dc | 3921 | |
725a69d2 | 3922 | else |
3923 | Set_Ekind (Predef_Prims, E_Constant); | |
3924 | Set_Is_Statically_Allocated (Predef_Prims); | |
3925 | Set_Is_True_Constant (Predef_Prims); | |
343d35dc | 3926 | |
725a69d2 | 3927 | Set_Ekind (Iface_DT, E_Constant); |
3928 | Set_Is_Statically_Allocated (Iface_DT); | |
3929 | Set_Is_True_Constant (Iface_DT); | |
343d35dc | 3930 | end if; |
3931 | ||
f301a57b | 3932 | -- Calculate the number of slots of the dispatch table. If the number |
3933 | -- of primitives of Typ is 0 we reserve a dummy single entry for its | |
0c826ed4 | 3934 | -- DT because at run time the pointer to this dummy entry will be |
f301a57b | 3935 | -- used as the tag. |
68f95949 | 3936 | |
cdb1c38f | 3937 | if Num_Iface_Prims = 0 then |
725a69d2 | 3938 | Empty_DT := True; |
3939 | Nb_Prim := 1; | |
cdb1c38f | 3940 | else |
3941 | Nb_Prim := Num_Iface_Prims; | |
725a69d2 | 3942 | end if; |
76a1c25b | 3943 | |
725a69d2 | 3944 | -- Generate: |
952af0b9 | 3945 | |
725a69d2 | 3946 | -- Predef_Prims : Address_Array (1 .. Default_Prim_Ops_Count) := |
3947 | -- (predef-prim-op-thunk-1'address, | |
3948 | -- predef-prim-op-thunk-2'address, | |
3949 | -- ... | |
3950 | -- predef-prim-op-thunk-n'address); | |
3951 | -- for Predef_Prims'Alignment use Address'Alignment | |
952af0b9 | 3952 | |
725a69d2 | 3953 | -- Stage 1: Calculate the number of predefined primitives |
76a1c25b | 3954 | |
24971415 | 3955 | if not Building_Static_DT (Typ) then |
725a69d2 | 3956 | Nb_Predef_Prims := Max_Predef_Prims; |
3957 | else | |
3958 | Prim_Elmt := First_Elmt (Primitive_Operations (Typ)); | |
3959 | while Present (Prim_Elmt) loop | |
3960 | Prim := Node (Prim_Elmt); | |
aad6babd | 3961 | |
725a69d2 | 3962 | if Is_Predefined_Dispatching_Operation (Prim) |
3963 | and then not Is_Abstract_Subprogram (Prim) | |
3964 | then | |
3965 | Pos := UI_To_Int (DT_Position (Prim)); | |
aad6babd | 3966 | |
725a69d2 | 3967 | if Pos > Nb_Predef_Prims then |
3968 | Nb_Predef_Prims := Pos; | |
3969 | end if; | |
3970 | end if; | |
aad6babd | 3971 | |
725a69d2 | 3972 | Next_Elmt (Prim_Elmt); |
3973 | end loop; | |
3974 | end if; | |
aad6babd | 3975 | |
725a69d2 | 3976 | -- Stage 2: Create the thunks associated with the predefined |
3977 | -- primitives and save their entity to fill the aggregate. | |
ee6ba406 | 3978 | |
725a69d2 | 3979 | declare |
3980 | Prim_Table : array (Nat range 1 .. Nb_Predef_Prims) of Entity_Id; | |
cc60bd16 | 3981 | Decl : Node_Id; |
725a69d2 | 3982 | Thunk_Id : Entity_Id; |
3983 | Thunk_Code : Node_Id; | |
aad6babd | 3984 | |
725a69d2 | 3985 | begin |
3986 | Prim_Ops_Aggr_List := New_List; | |
3987 | Prim_Table := (others => Empty); | |
aad6babd | 3988 | |
cdb1c38f | 3989 | if Building_Static_DT (Typ) then |
3990 | Prim_Elmt := First_Elmt (Primitive_Operations (Typ)); | |
3991 | while Present (Prim_Elmt) loop | |
3992 | Prim := Node (Prim_Elmt); | |
aad6babd | 3993 | |
cdb1c38f | 3994 | if Is_Predefined_Dispatching_Operation (Prim) |
3995 | and then not Is_Abstract_Subprogram (Prim) | |
3f8cf2d2 | 3996 | and then not Is_Eliminated (Prim) |
cdb1c38f | 3997 | and then not Present (Prim_Table |
3998 | (UI_To_Int (DT_Position (Prim)))) | |
3999 | then | |
4000 | if not Build_Thunks then | |
4001 | Prim_Table (UI_To_Int (DT_Position (Prim))) := | |
4002 | Alias (Prim); | |
aad6babd | 4003 | |
cdb1c38f | 4004 | else |
fc2907f6 | 4005 | Expand_Interface_Thunk |
4006 | (Ultimate_Alias (Prim), Thunk_Id, Thunk_Code); | |
aad6babd | 4007 | |
cdb1c38f | 4008 | if Present (Thunk_Id) then |
4009 | Append_To (Result, Thunk_Code); | |
4010 | Prim_Table (UI_To_Int (DT_Position (Prim))) | |
4011 | := Thunk_Id; | |
4012 | end if; | |
4013 | end if; | |
725a69d2 | 4014 | end if; |
aad6babd | 4015 | |
cdb1c38f | 4016 | Next_Elmt (Prim_Elmt); |
4017 | end loop; | |
4018 | end if; | |
aad6babd | 4019 | |
725a69d2 | 4020 | for J in Prim_Table'Range loop |
4021 | if Present (Prim_Table (J)) then | |
4022 | New_Node := | |
cc60bd16 | 4023 | Unchecked_Convert_To (RTE (RE_Prim_Ptr), |
acf97c11 | 4024 | Make_Attribute_Reference (Loc, |
4025 | Prefix => New_Reference_To (Prim_Table (J), Loc), | |
4026 | Attribute_Name => Name_Unrestricted_Access)); | |
725a69d2 | 4027 | else |
cc60bd16 | 4028 | New_Node := Make_Null (Loc); |
725a69d2 | 4029 | end if; |
952af0b9 | 4030 | |
725a69d2 | 4031 | Append_To (Prim_Ops_Aggr_List, New_Node); |
4032 | end loop; | |
952af0b9 | 4033 | |
cc60bd16 | 4034 | New_Node := |
4035 | Make_Aggregate (Loc, | |
4036 | Expressions => Prim_Ops_Aggr_List); | |
4037 | ||
4038 | -- Remember aggregates initializing dispatch tables | |
4039 | ||
4040 | Append_Elmt (New_Node, DT_Aggr); | |
4041 | ||
4042 | Decl := | |
4043 | Make_Subtype_Declaration (Loc, | |
ec97ce79 | 4044 | Defining_Identifier => Make_Temporary (Loc, 'S'), |
4045 | Subtype_Indication => | |
cc60bd16 | 4046 | New_Reference_To (RTE (RE_Address_Array), Loc)); |
4047 | ||
4048 | Append_To (Result, Decl); | |
4049 | ||
725a69d2 | 4050 | Append_To (Result, |
4051 | Make_Object_Declaration (Loc, | |
4052 | Defining_Identifier => Predef_Prims, | |
24971415 | 4053 | Constant_Present => Building_Static_DT (Typ), |
725a69d2 | 4054 | Aliased_Present => True, |
cc60bd16 | 4055 | Object_Definition => New_Reference_To |
4056 | (Defining_Identifier (Decl), Loc), | |
4057 | Expression => New_Node)); | |
aad6babd | 4058 | |
725a69d2 | 4059 | Append_To (Result, |
4060 | Make_Attribute_Definition_Clause (Loc, | |
4061 | Name => New_Reference_To (Predef_Prims, Loc), | |
4062 | Chars => Name_Alignment, | |
4063 | Expression => | |
4064 | Make_Attribute_Reference (Loc, | |
4065 | Prefix => | |
4066 | New_Reference_To (RTE (RE_Integer_Address), Loc), | |
4067 | Attribute_Name => Name_Alignment))); | |
4068 | end; | |
aad6babd | 4069 | |
725a69d2 | 4070 | -- Generate |
76a1c25b | 4071 | |
725a69d2 | 4072 | -- OSD : Ada.Tags.Object_Specific_Data (Nb_Prims) := |
4073 | -- (OSD_Table => (1 => <value>, | |
4074 | -- ... | |
4075 | -- N => <value>)); | |
76a1c25b | 4076 | |
725a69d2 | 4077 | -- Iface_DT : Dispatch_Table (Nb_Prims) := |
4078 | -- ([ Signature => <sig-value> ], | |
4079 | -- Tag_Kind => <tag_kind-value>, | |
4080 | -- Predef_Prims => Predef_Prims'Address, | |
4081 | -- Offset_To_Top => 0, | |
4082 | -- OSD => OSD'Address, | |
4083 | -- Prims_Ptr => (prim-op-1'address, | |
4084 | -- prim-op-2'address, | |
4085 | -- ... | |
4086 | -- prim-op-n'address)); | |
f301a57b | 4087 | -- for Iface_DT'Alignment use Address'Alignment; |
76a1c25b | 4088 | |
725a69d2 | 4089 | -- Stage 3: Initialize the discriminant and the record components |
aad6babd | 4090 | |
725a69d2 | 4091 | DT_Constr_List := New_List; |
4092 | DT_Aggr_List := New_List; | |
343d35dc | 4093 | |
725a69d2 | 4094 | -- Nb_Prim. If the tagged type has no primitives we add a dummy |
4095 | -- slot whose address will be the tag of this type. | |
343d35dc | 4096 | |
725a69d2 | 4097 | if Nb_Prim = 0 then |
4098 | New_Node := Make_Integer_Literal (Loc, 1); | |
4099 | else | |
4100 | New_Node := Make_Integer_Literal (Loc, Nb_Prim); | |
4101 | end if; | |
343d35dc | 4102 | |
725a69d2 | 4103 | Append_To (DT_Constr_List, New_Node); |
4104 | Append_To (DT_Aggr_List, New_Copy (New_Node)); | |
343d35dc | 4105 | |
725a69d2 | 4106 | -- Signature |
343d35dc | 4107 | |
725a69d2 | 4108 | if RTE_Record_Component_Available (RE_Signature) then |
4109 | Append_To (DT_Aggr_List, | |
4110 | New_Reference_To (RTE (RE_Secondary_DT), Loc)); | |
4111 | end if; | |
343d35dc | 4112 | |
725a69d2 | 4113 | -- Tag_Kind |
343d35dc | 4114 | |
725a69d2 | 4115 | if RTE_Record_Component_Available (RE_Tag_Kind) then |
4116 | Append_To (DT_Aggr_List, Tagged_Kind (Typ)); | |
4117 | end if; | |
aad6babd | 4118 | |
725a69d2 | 4119 | -- Predef_Prims |
aad6babd | 4120 | |
725a69d2 | 4121 | Append_To (DT_Aggr_List, |
4122 | Make_Attribute_Reference (Loc, | |
4123 | Prefix => New_Reference_To (Predef_Prims, Loc), | |
4124 | Attribute_Name => Name_Address)); | |
aad6babd | 4125 | |
725a69d2 | 4126 | -- Note: The correct value of Offset_To_Top will be set by the init |
4127 | -- subprogram | |
aad6babd | 4128 | |
725a69d2 | 4129 | Append_To (DT_Aggr_List, Make_Integer_Literal (Loc, 0)); |
aad6babd | 4130 | |
725a69d2 | 4131 | -- Generate the Object Specific Data table required to dispatch calls |
4132 | -- through synchronized interfaces. | |
aad6babd | 4133 | |
725a69d2 | 4134 | if Empty_DT |
4135 | or else Is_Abstract_Type (Typ) | |
4136 | or else Is_Controlled (Typ) | |
4137 | or else Restriction_Active (No_Dispatching_Calls) | |
4138 | or else not Is_Limited_Type (Typ) | |
a652dd51 | 4139 | or else not Has_Interfaces (Typ) |
cdb1c38f | 4140 | or else not Build_Thunks |
38d2fa31 | 4141 | or else not RTE_Record_Component_Available (RE_OSD_Table) |
725a69d2 | 4142 | then |
4143 | -- No OSD table required | |
ee6ba406 | 4144 | |
725a69d2 | 4145 | Append_To (DT_Aggr_List, |
4146 | New_Reference_To (RTE (RE_Null_Address), Loc)); | |
d62940bf | 4147 | |
725a69d2 | 4148 | else |
4149 | OSD_Aggr_List := New_List; | |
d62940bf | 4150 | |
725a69d2 | 4151 | declare |
4152 | Prim_Table : array (Nat range 1 .. Nb_Prim) of Entity_Id; | |
4153 | Prim : Entity_Id; | |
4154 | Prim_Alias : Entity_Id; | |
4155 | Prim_Elmt : Elmt_Id; | |
4156 | E : Entity_Id; | |
4157 | Count : Nat := 0; | |
4158 | Pos : Nat; | |
d62940bf | 4159 | |
725a69d2 | 4160 | begin |
4161 | Prim_Table := (others => Empty); | |
4162 | Prim_Alias := Empty; | |
d62940bf | 4163 | |
725a69d2 | 4164 | Prim_Elmt := First_Elmt (Primitive_Operations (Typ)); |
4165 | while Present (Prim_Elmt) loop | |
4166 | Prim := Node (Prim_Elmt); | |
d62940bf | 4167 | |
a652dd51 | 4168 | if Present (Interface_Alias (Prim)) |
725a69d2 | 4169 | and then Find_Dispatching_Type |
a652dd51 | 4170 | (Interface_Alias (Prim)) = Iface |
725a69d2 | 4171 | then |
a652dd51 | 4172 | Prim_Alias := Interface_Alias (Prim); |
fc2907f6 | 4173 | E := Ultimate_Alias (Prim); |
725a69d2 | 4174 | Pos := UI_To_Int (DT_Position (Prim_Alias)); |
68f95949 | 4175 | |
725a69d2 | 4176 | if Present (Prim_Table (Pos)) then |
4177 | pragma Assert (Prim_Table (Pos) = E); | |
4178 | null; | |
68f95949 | 4179 | |
725a69d2 | 4180 | else |
4181 | Prim_Table (Pos) := E; | |
4182 | ||
4183 | Append_To (OSD_Aggr_List, | |
4184 | Make_Component_Association (Loc, | |
4185 | Choices => New_List ( | |
4186 | Make_Integer_Literal (Loc, | |
4187 | DT_Position (Prim_Alias))), | |
4188 | Expression => | |
4189 | Make_Integer_Literal (Loc, | |
4190 | DT_Position (Alias (Prim))))); | |
4191 | ||
4192 | Count := Count + 1; | |
4193 | end if; | |
4194 | end if; | |
4195 | ||
4196 | Next_Elmt (Prim_Elmt); | |
4197 | end loop; | |
4198 | pragma Assert (Count = Nb_Prim); | |
4199 | end; | |
4200 | ||
ec97ce79 | 4201 | OSD := Make_Temporary (Loc, 'I'); |
725a69d2 | 4202 | |
4203 | Append_To (Result, | |
4204 | Make_Object_Declaration (Loc, | |
4205 | Defining_Identifier => OSD, | |
4206 | Object_Definition => | |
4207 | Make_Subtype_Indication (Loc, | |
4208 | Subtype_Mark => | |
4209 | New_Reference_To (RTE (RE_Object_Specific_Data), Loc), | |
4210 | Constraint => | |
4211 | Make_Index_Or_Discriminant_Constraint (Loc, | |
4212 | Constraints => New_List ( | |
4213 | Make_Integer_Literal (Loc, Nb_Prim)))), | |
725a69d2 | 4214 | |
ec97ce79 | 4215 | Expression => |
4216 | Make_Aggregate (Loc, | |
4217 | Component_Associations => New_List ( | |
4218 | Make_Component_Association (Loc, | |
4219 | Choices => New_List ( | |
4220 | New_Occurrence_Of | |
4221 | (RTE_Record_Component (RE_OSD_Num_Prims), Loc)), | |
4222 | Expression => | |
4223 | Make_Integer_Literal (Loc, Nb_Prim)), | |
4224 | ||
4225 | Make_Component_Association (Loc, | |
4226 | Choices => New_List ( | |
4227 | New_Occurrence_Of | |
4228 | (RTE_Record_Component (RE_OSD_Table), Loc)), | |
4229 | Expression => Make_Aggregate (Loc, | |
4230 | Component_Associations => OSD_Aggr_List)))))); | |
725a69d2 | 4231 | |
17e14451 | 4232 | Append_To (Result, |
4233 | Make_Attribute_Definition_Clause (Loc, | |
4234 | Name => New_Reference_To (OSD, Loc), | |
4235 | Chars => Name_Alignment, | |
4236 | Expression => | |
4237 | Make_Attribute_Reference (Loc, | |
4238 | Prefix => | |
4239 | New_Reference_To (RTE (RE_Integer_Address), Loc), | |
4240 | Attribute_Name => Name_Alignment))); | |
4241 | ||
725a69d2 | 4242 | -- In secondary dispatch tables the Typeinfo component contains |
4243 | -- the address of the Object Specific Data (see a-tags.ads) | |
4244 | ||
4245 | Append_To (DT_Aggr_List, | |
4246 | Make_Attribute_Reference (Loc, | |
4247 | Prefix => New_Reference_To (OSD, Loc), | |
4248 | Attribute_Name => Name_Address)); | |
4249 | end if; | |
4250 | ||
4251 | -- Initialize the table of primitive operations | |
4252 | ||
4253 | Prim_Ops_Aggr_List := New_List; | |
4254 | ||
4255 | if Empty_DT then | |
cc60bd16 | 4256 | Append_To (Prim_Ops_Aggr_List, Make_Null (Loc)); |
725a69d2 | 4257 | |
4258 | elsif Is_Abstract_Type (Typ) | |
9a479e51 | 4259 | or else not Building_Static_DT (Typ) |
725a69d2 | 4260 | then |
4261 | for J in 1 .. Nb_Prim loop | |
cc60bd16 | 4262 | Append_To (Prim_Ops_Aggr_List, Make_Null (Loc)); |
725a69d2 | 4263 | end loop; |
4264 | ||
4265 | else | |
4266 | declare | |
d00681a7 | 4267 | CPP_Nb_Prims : constant Nat := CPP_Num_Prims (Typ); |
4268 | E : Entity_Id; | |
4269 | Prim_Pos : Nat; | |
4270 | Prim_Table : array (Nat range 1 .. Nb_Prim) of Entity_Id; | |
4271 | Thunk_Code : Node_Id; | |
4272 | Thunk_Id : Entity_Id; | |
725a69d2 | 4273 | |
4274 | begin | |
4275 | Prim_Table := (others => Empty); | |
4276 | ||
4277 | Prim_Elmt := First_Elmt (Primitive_Operations (Typ)); | |
4278 | while Present (Prim_Elmt) loop | |
d00681a7 | 4279 | Prim := Node (Prim_Elmt); |
4280 | E := Ultimate_Alias (Prim); | |
4281 | Prim_Pos := UI_To_Int (DT_Position (E)); | |
725a69d2 | 4282 | |
d00681a7 | 4283 | -- Do not reference predefined primitives because they are |
4284 | -- located in a separate dispatch table; skip abstract and | |
4285 | -- eliminated primitives; skip primitives located in the C++ | |
4286 | -- part of the dispatch table because their slot is set by | |
4287 | -- the IC routine. | |
3f8cf2d2 | 4288 | |
725a69d2 | 4289 | if not Is_Predefined_Dispatching_Operation (Prim) |
a652dd51 | 4290 | and then Present (Interface_Alias (Prim)) |
725a69d2 | 4291 | and then not Is_Abstract_Subprogram (Alias (Prim)) |
3f8cf2d2 | 4292 | and then not Is_Eliminated (Alias (Prim)) |
d00681a7 | 4293 | and then (not Is_CPP_Class (Root_Type (Typ)) |
4294 | or else Prim_Pos > CPP_Nb_Prims) | |
725a69d2 | 4295 | and then Find_Dispatching_Type |
a652dd51 | 4296 | (Interface_Alias (Prim)) = Iface |
725a69d2 | 4297 | |
4298 | -- Generate the code of the thunk only if the abstract | |
4299 | -- interface type is not an immediate ancestor of | |
d00681a7 | 4300 | -- Tagged_Type. Otherwise the DT associated with the |
725a69d2 | 4301 | -- interface is the primary DT. |
4302 | ||
cb4af01d | 4303 | and then not Is_Ancestor (Iface, Typ, |
4304 | Use_Full_View => True) | |
725a69d2 | 4305 | then |
cdb1c38f | 4306 | if not Build_Thunks then |
d00681a7 | 4307 | Prim_Pos := |
a652dd51 | 4308 | UI_To_Int (DT_Position (Interface_Alias (Prim))); |
d00681a7 | 4309 | Prim_Table (Prim_Pos) := Alias (Prim); |
4310 | ||
cdb1c38f | 4311 | else |
4312 | Expand_Interface_Thunk (Prim, Thunk_Id, Thunk_Code); | |
725a69d2 | 4313 | |
cdb1c38f | 4314 | if Present (Thunk_Id) then |
d00681a7 | 4315 | Prim_Pos := |
a652dd51 | 4316 | UI_To_Int (DT_Position (Interface_Alias (Prim))); |
cdb1c38f | 4317 | |
d00681a7 | 4318 | Prim_Table (Prim_Pos) := Thunk_Id; |
cdb1c38f | 4319 | Append_To (Result, Thunk_Code); |
4320 | end if; | |
725a69d2 | 4321 | end if; |
4322 | end if; | |
4323 | ||
4324 | Next_Elmt (Prim_Elmt); | |
4325 | end loop; | |
4326 | ||
4327 | for J in Prim_Table'Range loop | |
4328 | if Present (Prim_Table (J)) then | |
4329 | New_Node := | |
cc60bd16 | 4330 | Unchecked_Convert_To (RTE (RE_Prim_Ptr), |
acf97c11 | 4331 | Make_Attribute_Reference (Loc, |
4332 | Prefix => New_Reference_To (Prim_Table (J), Loc), | |
4333 | Attribute_Name => Name_Unrestricted_Access)); | |
d00681a7 | 4334 | |
725a69d2 | 4335 | else |
cc60bd16 | 4336 | New_Node := Make_Null (Loc); |
725a69d2 | 4337 | end if; |
4338 | ||
4339 | Append_To (Prim_Ops_Aggr_List, New_Node); | |
4340 | end loop; | |
4341 | end; | |
4342 | end if; | |
4343 | ||
cc60bd16 | 4344 | New_Node := |
725a69d2 | 4345 | Make_Aggregate (Loc, |
cc60bd16 | 4346 | Expressions => Prim_Ops_Aggr_List); |
4347 | ||
4348 | Append_To (DT_Aggr_List, New_Node); | |
4349 | ||
4350 | -- Remember aggregates initializing dispatch tables | |
4351 | ||
4352 | Append_Elmt (New_Node, DT_Aggr); | |
725a69d2 | 4353 | |
f301a57b | 4354 | -- Note: Secondary dispatch tables cannot be declared constant |
4355 | -- because the component Offset_To_Top is currently initialized | |
4356 | -- by the IP routine. | |
4357 | ||
725a69d2 | 4358 | Append_To (Result, |
4359 | Make_Object_Declaration (Loc, | |
4360 | Defining_Identifier => Iface_DT, | |
4361 | Aliased_Present => True, | |
f301a57b | 4362 | Constant_Present => False, |
4363 | ||
725a69d2 | 4364 | Object_Definition => |
4365 | Make_Subtype_Indication (Loc, | |
4366 | Subtype_Mark => New_Reference_To | |
4367 | (RTE (RE_Dispatch_Table_Wrapper), Loc), | |
4368 | Constraint => Make_Index_Or_Discriminant_Constraint (Loc, | |
4369 | Constraints => DT_Constr_List)), | |
4370 | ||
f301a57b | 4371 | Expression => |
4372 | Make_Aggregate (Loc, | |
4373 | Expressions => DT_Aggr_List))); | |
725a69d2 | 4374 | |
17e14451 | 4375 | Append_To (Result, |
4376 | Make_Attribute_Definition_Clause (Loc, | |
4377 | Name => New_Reference_To (Iface_DT, Loc), | |
4378 | Chars => Name_Alignment, | |
f301a57b | 4379 | |
17e14451 | 4380 | Expression => |
4381 | Make_Attribute_Reference (Loc, | |
f301a57b | 4382 | Prefix => |
17e14451 | 4383 | New_Reference_To (RTE (RE_Integer_Address), Loc), |
4384 | Attribute_Name => Name_Alignment))); | |
4385 | ||
f301a57b | 4386 | if Exporting_Table then |
4387 | Export_DT (Typ, Iface_DT, Suffix_Index); | |
4388 | ||
725a69d2 | 4389 | -- Generate code to create the pointer to the dispatch table |
4390 | ||
f301a57b | 4391 | -- Iface_DT_Ptr : Tag := Tag!(DT.Prims_Ptr'Address); |
725a69d2 | 4392 | |
f301a57b | 4393 | -- Note: This declaration is not added here if the table is exported |
4394 | -- because in such case Make_Tags has already added this declaration. | |
4395 | ||
4396 | else | |
4397 | Append_To (Result, | |
4398 | Make_Object_Declaration (Loc, | |
4399 | Defining_Identifier => Iface_DT_Ptr, | |
4400 | Constant_Present => True, | |
4401 | ||
4402 | Object_Definition => | |
4403 | New_Reference_To (RTE (RE_Interface_Tag), Loc), | |
4404 | ||
4405 | Expression => | |
4406 | Unchecked_Convert_To (RTE (RE_Interface_Tag), | |
4407 | Make_Attribute_Reference (Loc, | |
4408 | Prefix => | |
4409 | Make_Selected_Component (Loc, | |
4410 | Prefix => New_Reference_To (Iface_DT, Loc), | |
4411 | Selector_Name => | |
4412 | New_Occurrence_Of | |
4413 | (RTE_Record_Component (RE_Prims_Ptr), Loc)), | |
4414 | Attribute_Name => Name_Address)))); | |
4415 | end if; | |
725a69d2 | 4416 | |
acf97c11 | 4417 | Append_To (Result, |
4418 | Make_Object_Declaration (Loc, | |
4419 | Defining_Identifier => Predef_Prims_Ptr, | |
4420 | Constant_Present => True, | |
f301a57b | 4421 | |
4422 | Object_Definition => | |
acf97c11 | 4423 | New_Reference_To (RTE (RE_Address), Loc), |
f301a57b | 4424 | |
4425 | Expression => | |
acf97c11 | 4426 | Make_Attribute_Reference (Loc, |
f301a57b | 4427 | Prefix => |
acf97c11 | 4428 | Make_Selected_Component (Loc, |
f301a57b | 4429 | Prefix => New_Reference_To (Iface_DT, Loc), |
4430 | Selector_Name => | |
4431 | New_Occurrence_Of | |
4432 | (RTE_Record_Component (RE_Predef_Prims), Loc)), | |
acf97c11 | 4433 | Attribute_Name => Name_Address))); |
4434 | ||
cc60bd16 | 4435 | -- Remember entities containing dispatch tables |
acf97c11 | 4436 | |
cc60bd16 | 4437 | Append_Elmt (Predef_Prims, DT_Decl); |
4438 | Append_Elmt (Iface_DT, DT_Decl); | |
725a69d2 | 4439 | end Make_Secondary_DT; |
4440 | ||
4441 | -- Local variables | |
4442 | ||
2ea346ac | 4443 | Elab_Code : constant List_Id := New_List; |
4444 | Result : constant List_Id := New_List; | |
4445 | Tname : constant Name_Id := Chars (Typ); | |
725a69d2 | 4446 | AI : Elmt_Id; |
cdb1c38f | 4447 | AI_Tag_Elmt : Elmt_Id; |
24971415 | 4448 | AI_Tag_Comp : Elmt_Id; |
f9162257 | 4449 | DT_Aggr_List : List_Id; |
24971415 | 4450 | DT_Constr_List : List_Id; |
725a69d2 | 4451 | DT_Ptr : Entity_Id; |
725a69d2 | 4452 | ITable : Node_Id; |
4453 | I_Depth : Nat := 0; | |
4454 | Iface_Table_Node : Node_Id; | |
4455 | Name_ITable : Name_Id; | |
725a69d2 | 4456 | Nb_Predef_Prims : Nat := 0; |
4457 | Nb_Prim : Nat := 0; | |
4458 | New_Node : Node_Id; | |
725a69d2 | 4459 | Num_Ifaces : Nat := 0; |
cc60bd16 | 4460 | Parent_Typ : Entity_Id; |
725a69d2 | 4461 | Prim : Entity_Id; |
4462 | Prim_Elmt : Elmt_Id; | |
4463 | Prim_Ops_Aggr_List : List_Id; | |
725a69d2 | 4464 | Suffix_Index : Int; |
4465 | Typ_Comps : Elist_Id; | |
4466 | Typ_Ifaces : Elist_Id; | |
4467 | TSD_Aggr_List : List_Id; | |
4468 | TSD_Tags_List : List_Id; | |
17e14451 | 4469 | |
4470 | -- The following name entries are used by Make_DT to generate a number | |
4471 | -- of entities related to a tagged type. These entities may be generated | |
4472 | -- in a scope other than that of the tagged type declaration, and if | |
4473 | -- the entities for two tagged types with the same name happen to be | |
4474 | -- generated in the same scope, we have to take care to use different | |
4475 | -- names. This is achieved by means of a unique serial number appended | |
4476 | -- to each generated entity name. | |
4477 | ||
4478 | Name_DT : constant Name_Id := | |
4479 | New_External_Name (Tname, 'T', Suffix_Index => -1); | |
4480 | Name_Exname : constant Name_Id := | |
4481 | New_External_Name (Tname, 'E', Suffix_Index => -1); | |
e7e688dd | 4482 | Name_HT_Link : constant Name_Id := |
4483 | New_External_Name (Tname, 'H', Suffix_Index => -1); | |
17e14451 | 4484 | Name_Predef_Prims : constant Name_Id := |
4485 | New_External_Name (Tname, 'R', Suffix_Index => -1); | |
4486 | Name_SSD : constant Name_Id := | |
4487 | New_External_Name (Tname, 'S', Suffix_Index => -1); | |
4488 | Name_TSD : constant Name_Id := | |
4489 | New_External_Name (Tname, 'B', Suffix_Index => -1); | |
4490 | ||
4491 | -- Entities built with above names | |
4492 | ||
4493 | DT : constant Entity_Id := | |
4494 | Make_Defining_Identifier (Loc, Name_DT); | |
4495 | Exname : constant Entity_Id := | |
4496 | Make_Defining_Identifier (Loc, Name_Exname); | |
e7e688dd | 4497 | HT_Link : constant Entity_Id := |
4498 | Make_Defining_Identifier (Loc, Name_HT_Link); | |
17e14451 | 4499 | Predef_Prims : constant Entity_Id := |
4500 | Make_Defining_Identifier (Loc, Name_Predef_Prims); | |
4501 | SSD : constant Entity_Id := | |
4502 | Make_Defining_Identifier (Loc, Name_SSD); | |
4503 | TSD : constant Entity_Id := | |
4504 | Make_Defining_Identifier (Loc, Name_TSD); | |
725a69d2 | 4505 | |
4506 | -- Start of processing for Make_DT | |
4507 | ||
4508 | begin | |
17e14451 | 4509 | pragma Assert (Is_Frozen (Typ)); |
725a69d2 | 4510 | |
17e14451 | 4511 | -- Handle cases in which there is no need to build the dispatch table |
725a69d2 | 4512 | |
17e14451 | 4513 | if Has_Dispatch_Table (Typ) |
4514 | or else No (Access_Disp_Table (Typ)) | |
4515 | or else Is_CPP_Class (Typ) | |
b46aca2b | 4516 | or else Convention (Typ) = Convention_CIL |
4517 | or else Convention (Typ) = Convention_Java | |
17e14451 | 4518 | then |
725a69d2 | 4519 | return Result; |
725a69d2 | 4520 | |
17e14451 | 4521 | elsif No_Run_Time_Mode then |
4522 | Error_Msg_CRT ("tagged types", Typ); | |
4523 | return Result; | |
725a69d2 | 4524 | |
17e14451 | 4525 | elsif not RTE_Available (RE_Tag) then |
725a69d2 | 4526 | Append_To (Result, |
4527 | Make_Object_Declaration (Loc, | |
17e14451 | 4528 | Defining_Identifier => Node (First_Elmt |
4529 | (Access_Disp_Table (Typ))), | |
725a69d2 | 4530 | Object_Definition => New_Reference_To (RTE (RE_Tag), Loc), |
4531 | Constant_Present => True, | |
4532 | Expression => | |
24971415 | 4533 | Unchecked_Convert_To (RTE (RE_Tag), |
725a69d2 | 4534 | New_Reference_To (RTE (RE_Null_Address), Loc)))); |
4535 | ||
4536 | Analyze_List (Result, Suppress => All_Checks); | |
4537 | Error_Msg_CRT ("tagged types", Typ); | |
4538 | return Result; | |
4539 | end if; | |
4540 | ||
17e14451 | 4541 | -- Ensure that the value of Max_Predef_Prims defined in a-tags is |
208fd589 | 4542 | -- correct. Valid values are 9 under configurable runtime or 15 |
17e14451 | 4543 | -- with full runtime. |
4544 | ||
4545 | if RTE_Available (RE_Interface_Data) then | |
208fd589 | 4546 | if Max_Predef_Prims /= 15 then |
17e14451 | 4547 | Error_Msg_N ("run-time library configuration error", Typ); |
4548 | return Result; | |
4549 | end if; | |
725a69d2 | 4550 | else |
208fd589 | 4551 | if Max_Predef_Prims /= 9 then |
17e14451 | 4552 | Error_Msg_N ("run-time library configuration error", Typ); |
4553 | Error_Msg_CRT ("tagged types", Typ); | |
4554 | return Result; | |
4555 | end if; | |
725a69d2 | 4556 | end if; |
4557 | ||
cc60bd16 | 4558 | -- Initialize Parent_Typ handling private types |
4559 | ||
4560 | Parent_Typ := Etype (Typ); | |
4561 | ||
4562 | if Present (Full_View (Parent_Typ)) then | |
4563 | Parent_Typ := Full_View (Parent_Typ); | |
4564 | end if; | |
4565 | ||
17e14451 | 4566 | -- Ensure that all the primitives are frozen. This is only required when |
4567 | -- building static dispatch tables --- the primitives must be frozen to | |
4568 | -- be referenced (otherwise we have problems with the backend). It is | |
4569 | -- not a requirement with nonstatic dispatch tables because in this case | |
4570 | -- we generate now an empty dispatch table; the extra code required to | |
24971415 | 4571 | -- register the primitives in the slots will be generated later --- when |
17e14451 | 4572 | -- each primitive is frozen (see Freeze_Subprogram). |
725a69d2 | 4573 | |
d00681a7 | 4574 | if Building_Static_DT (Typ) then |
17e14451 | 4575 | declare |
4576 | Save : constant Boolean := Freezing_Library_Level_Tagged_Type; | |
555c63a6 | 4577 | Prim : Entity_Id; |
17e14451 | 4578 | Prim_Elmt : Elmt_Id; |
4579 | Frnodes : List_Id; | |
725a69d2 | 4580 | |
17e14451 | 4581 | begin |
4582 | Freezing_Library_Level_Tagged_Type := True; | |
555c63a6 | 4583 | |
17e14451 | 4584 | Prim_Elmt := First_Elmt (Primitive_Operations (Typ)); |
4585 | while Present (Prim_Elmt) loop | |
555c63a6 | 4586 | Prim := Node (Prim_Elmt); |
d74fc39a | 4587 | Frnodes := Freeze_Entity (Prim, Typ); |
725a69d2 | 4588 | |
17e14451 | 4589 | declare |
17e14451 | 4590 | F : Entity_Id; |
725a69d2 | 4591 | |
17e14451 | 4592 | begin |
555c63a6 | 4593 | F := First_Formal (Prim); |
17e14451 | 4594 | while Present (F) loop |
349db231 | 4595 | Check_Premature_Freezing (Prim, Typ, Etype (F)); |
17e14451 | 4596 | Next_Formal (F); |
4597 | end loop; | |
4598 | ||
349db231 | 4599 | Check_Premature_Freezing (Prim, Typ, Etype (Prim)); |
17e14451 | 4600 | end; |
4601 | ||
4602 | if Present (Frnodes) then | |
4603 | Append_List_To (Result, Frnodes); | |
4604 | end if; | |
4605 | ||
4606 | Next_Elmt (Prim_Elmt); | |
4607 | end loop; | |
555c63a6 | 4608 | |
17e14451 | 4609 | Freezing_Library_Level_Tagged_Type := Save; |
4610 | end; | |
4611 | end if; | |
725a69d2 | 4612 | |
17e14451 | 4613 | -- Ada 2005 (AI-251): Build the secondary dispatch tables |
4614 | ||
a652dd51 | 4615 | if Has_Interfaces (Typ) then |
17e14451 | 4616 | Collect_Interface_Components (Typ, Typ_Comps); |
4617 | ||
f301a57b | 4618 | -- Each secondary dispatch table is assigned an unique positive |
4619 | -- suffix index; such value also corresponds with the location of | |
4620 | -- its entity in the Dispatch_Table_Wrappers list (see Make_Tags). | |
4621 | ||
4622 | -- Note: This value must be kept sync with the Suffix_Index values | |
4623 | -- generated by Make_Tags | |
4624 | ||
4625 | Suffix_Index := 1; | |
acf97c11 | 4626 | AI_Tag_Elmt := |
4627 | Next_Elmt (Next_Elmt (First_Elmt (Access_Disp_Table (Typ)))); | |
17e14451 | 4628 | |
4629 | AI_Tag_Comp := First_Elmt (Typ_Comps); | |
4630 | while Present (AI_Tag_Comp) loop | |
d00681a7 | 4631 | pragma Assert (Has_Suffix (Node (AI_Tag_Elmt), 'P')); |
cdb1c38f | 4632 | |
4633 | -- Build the secondary table containing pointers to thunks | |
4634 | ||
17e14451 | 4635 | Make_Secondary_DT |
cdb1c38f | 4636 | (Typ => Typ, |
4637 | Iface => Base_Type (Related_Type (Node (AI_Tag_Comp))), | |
f301a57b | 4638 | Suffix_Index => Suffix_Index, |
cdb1c38f | 4639 | Num_Iface_Prims => UI_To_Int |
4640 | (DT_Entry_Count (Node (AI_Tag_Comp))), | |
4641 | Iface_DT_Ptr => Node (AI_Tag_Elmt), | |
acf97c11 | 4642 | Predef_Prims_Ptr => Node (Next_Elmt (AI_Tag_Elmt)), |
cdb1c38f | 4643 | Build_Thunks => True, |
4644 | Result => Result); | |
cdb1c38f | 4645 | |
d00681a7 | 4646 | -- Skip secondary dispatch table referencing thunks to predefined |
4647 | -- primitives. | |
acf97c11 | 4648 | |
f301a57b | 4649 | Next_Elmt (AI_Tag_Elmt); |
d00681a7 | 4650 | pragma Assert (Has_Suffix (Node (AI_Tag_Elmt), 'Y')); |
4651 | ||
4652 | -- Secondary dispatch table referencing user-defined primitives | |
4653 | -- covered by this interface. | |
4654 | ||
acf97c11 | 4655 | Next_Elmt (AI_Tag_Elmt); |
d00681a7 | 4656 | pragma Assert (Has_Suffix (Node (AI_Tag_Elmt), 'D')); |
acf97c11 | 4657 | |
36b938a3 | 4658 | -- Build the secondary table containing pointers to primitives |
cdb1c38f | 4659 | -- (used to give support to Generic Dispatching Constructors). |
4660 | ||
4661 | Make_Secondary_DT | |
d00681a7 | 4662 | (Typ => Typ, |
4663 | Iface => Base_Type | |
4664 | (Related_Type (Node (AI_Tag_Comp))), | |
4665 | Suffix_Index => -1, | |
4666 | Num_Iface_Prims => UI_To_Int | |
4667 | (DT_Entry_Count (Node (AI_Tag_Comp))), | |
4668 | Iface_DT_Ptr => Node (AI_Tag_Elmt), | |
4669 | Predef_Prims_Ptr => Node (Next_Elmt (AI_Tag_Elmt)), | |
4670 | Build_Thunks => False, | |
4671 | Result => Result); | |
4672 | ||
4673 | -- Skip secondary dispatch table referencing predefined primitives | |
acf97c11 | 4674 | |
f301a57b | 4675 | Next_Elmt (AI_Tag_Elmt); |
d00681a7 | 4676 | pragma Assert (Has_Suffix (Node (AI_Tag_Elmt), 'Z')); |
acf97c11 | 4677 | |
17e14451 | 4678 | Suffix_Index := Suffix_Index + 1; |
d00681a7 | 4679 | Next_Elmt (AI_Tag_Elmt); |
17e14451 | 4680 | Next_Elmt (AI_Tag_Comp); |
4681 | end loop; | |
4682 | end if; | |
725a69d2 | 4683 | |
c6a30f24 | 4684 | -- Get the _tag entity and number of primitives of its dispatch table |
725a69d2 | 4685 | |
24971415 | 4686 | DT_Ptr := Node (First_Elmt (Access_Disp_Table (Typ))); |
4687 | Nb_Prim := UI_To_Int (DT_Entry_Count (First_Tag_Component (Typ))); | |
725a69d2 | 4688 | |
2ea346ac | 4689 | Set_Is_Statically_Allocated (DT, Is_Library_Level_Tagged_Type (Typ)); |
4690 | Set_Is_Statically_Allocated (SSD, Is_Library_Level_Tagged_Type (Typ)); | |
4691 | Set_Is_Statically_Allocated (TSD, Is_Library_Level_Tagged_Type (Typ)); | |
4692 | Set_Is_Statically_Allocated (Predef_Prims, | |
4693 | Is_Library_Level_Tagged_Type (Typ)); | |
725a69d2 | 4694 | |
4695 | -- In case of locally defined tagged type we declare the object | |
36b938a3 | 4696 | -- containing the dispatch table by means of a variable. Its |
725a69d2 | 4697 | -- initialization is done later by means of an assignment. This is |
4698 | -- required to generate its External_Tag. | |
4699 | ||
24971415 | 4700 | if not Building_Static_DT (Typ) then |
725a69d2 | 4701 | |
4702 | -- Generate: | |
4703 | -- DT : No_Dispatch_Table_Wrapper; | |
17e14451 | 4704 | -- for DT'Alignment use Address'Alignment; |
725a69d2 | 4705 | -- DT_Ptr : Tag := !Tag (DT.NDT_Prims_Ptr'Address); |
4706 | ||
24971415 | 4707 | if not Has_DT (Typ) then |
725a69d2 | 4708 | Append_To (Result, |
4709 | Make_Object_Declaration (Loc, | |
4710 | Defining_Identifier => DT, | |
4711 | Aliased_Present => True, | |
4712 | Constant_Present => False, | |
4713 | Object_Definition => | |
4714 | New_Reference_To | |
4715 | (RTE (RE_No_Dispatch_Table_Wrapper), Loc))); | |
4716 | ||
17e14451 | 4717 | Append_To (Result, |
4718 | Make_Attribute_Definition_Clause (Loc, | |
4719 | Name => New_Reference_To (DT, Loc), | |
4720 | Chars => Name_Alignment, | |
4721 | Expression => | |
4722 | Make_Attribute_Reference (Loc, | |
4723 | Prefix => | |
4724 | New_Reference_To (RTE (RE_Integer_Address), Loc), | |
4725 | Attribute_Name => Name_Alignment))); | |
4726 | ||
725a69d2 | 4727 | Append_To (Result, |
4728 | Make_Object_Declaration (Loc, | |
4729 | Defining_Identifier => DT_Ptr, | |
4730 | Object_Definition => New_Reference_To (RTE (RE_Tag), Loc), | |
4731 | Constant_Present => True, | |
4732 | Expression => | |
24971415 | 4733 | Unchecked_Convert_To (RTE (RE_Tag), |
725a69d2 | 4734 | Make_Attribute_Reference (Loc, |
4735 | Prefix => | |
4736 | Make_Selected_Component (Loc, | |
4737 | Prefix => New_Reference_To (DT, Loc), | |
4738 | Selector_Name => | |
4739 | New_Occurrence_Of | |
4740 | (RTE_Record_Component (RE_NDT_Prims_Ptr), Loc)), | |
4741 | Attribute_Name => Name_Address)))); | |
4742 | ||
ff6293ec | 4743 | Set_Is_Statically_Allocated (DT_Ptr, |
4744 | Is_Library_Level_Tagged_Type (Typ)); | |
4745 | ||
98045ff0 | 4746 | -- Generate the SCIL node for the previous object declaration |
4747 | -- because it has a tag initialization. | |
4748 | ||
3dbca0d5 | 4749 | if Generate_SCIL then |
d215f619 | 4750 | New_Node := |
4751 | Make_SCIL_Dispatch_Table_Tag_Init (Sloc (Last (Result))); | |
d215f619 | 4752 | Set_SCIL_Entity (New_Node, Typ); |
5a44b136 | 4753 | Set_SCIL_Node (Last (Result), New_Node); |
3dbca0d5 | 4754 | end if; |
4755 | ||
725a69d2 | 4756 | -- Generate: |
4757 | -- DT : Dispatch_Table_Wrapper (Nb_Prim); | |
4758 | -- for DT'Alignment use Address'Alignment; | |
4759 | -- DT_Ptr : Tag := !Tag (DT.Prims_Ptr'Address); | |
4760 | ||
4761 | else | |
4762 | -- If the tagged type has no primitives we add a dummy slot | |
4763 | -- whose address will be the tag of this type. | |
4764 | ||
4765 | if Nb_Prim = 0 then | |
4766 | DT_Constr_List := | |
4767 | New_List (Make_Integer_Literal (Loc, 1)); | |
4768 | else | |
4769 | DT_Constr_List := | |
4770 | New_List (Make_Integer_Literal (Loc, Nb_Prim)); | |
4771 | end if; | |
4772 | ||
4773 | Append_To (Result, | |
4774 | Make_Object_Declaration (Loc, | |
4775 | Defining_Identifier => DT, | |
4776 | Aliased_Present => True, | |
4777 | Constant_Present => False, | |
4778 | Object_Definition => | |
4779 | Make_Subtype_Indication (Loc, | |
4780 | Subtype_Mark => | |
4781 | New_Reference_To (RTE (RE_Dispatch_Table_Wrapper), Loc), | |
4782 | Constraint => Make_Index_Or_Discriminant_Constraint (Loc, | |
4783 | Constraints => DT_Constr_List)))); | |
4784 | ||
4785 | Append_To (Result, | |
4786 | Make_Attribute_Definition_Clause (Loc, | |
4787 | Name => New_Reference_To (DT, Loc), | |
4788 | Chars => Name_Alignment, | |
4789 | Expression => | |
4790 | Make_Attribute_Reference (Loc, | |
4791 | Prefix => | |
4792 | New_Reference_To (RTE (RE_Integer_Address), Loc), | |
4793 | Attribute_Name => Name_Alignment))); | |
4794 | ||
4795 | Append_To (Result, | |
4796 | Make_Object_Declaration (Loc, | |
4797 | Defining_Identifier => DT_Ptr, | |
4798 | Object_Definition => New_Reference_To (RTE (RE_Tag), Loc), | |
4799 | Constant_Present => True, | |
4800 | Expression => | |
24971415 | 4801 | Unchecked_Convert_To (RTE (RE_Tag), |
725a69d2 | 4802 | Make_Attribute_Reference (Loc, |
4803 | Prefix => | |
4804 | Make_Selected_Component (Loc, | |
4805 | Prefix => New_Reference_To (DT, Loc), | |
4806 | Selector_Name => | |
4807 | New_Occurrence_Of | |
4808 | (RTE_Record_Component (RE_Prims_Ptr), Loc)), | |
4809 | Attribute_Name => Name_Address)))); | |
acf97c11 | 4810 | |
ff6293ec | 4811 | Set_Is_Statically_Allocated (DT_Ptr, |
4812 | Is_Library_Level_Tagged_Type (Typ)); | |
4813 | ||
98045ff0 | 4814 | -- Generate the SCIL node for the previous object declaration |
4815 | -- because it has a tag initialization. | |
9af28f61 | 4816 | |
3dbca0d5 | 4817 | if Generate_SCIL then |
d215f619 | 4818 | New_Node := |
4819 | Make_SCIL_Dispatch_Table_Tag_Init (Sloc (Last (Result))); | |
d215f619 | 4820 | Set_SCIL_Entity (New_Node, Typ); |
5a44b136 | 4821 | Set_SCIL_Node (Last (Result), New_Node); |
3dbca0d5 | 4822 | end if; |
4823 | ||
acf97c11 | 4824 | Append_To (Result, |
4825 | Make_Object_Declaration (Loc, | |
4826 | Defining_Identifier => | |
4827 | Node (Next_Elmt (First_Elmt (Access_Disp_Table (Typ)))), | |
4828 | Constant_Present => True, | |
4829 | Object_Definition => New_Reference_To | |
4830 | (RTE (RE_Address), Loc), | |
4831 | Expression => | |
4832 | Make_Attribute_Reference (Loc, | |
4833 | Prefix => | |
4834 | Make_Selected_Component (Loc, | |
4835 | Prefix => New_Reference_To (DT, Loc), | |
4836 | Selector_Name => | |
4837 | New_Occurrence_Of | |
4838 | (RTE_Record_Component (RE_Predef_Prims), Loc)), | |
4839 | Attribute_Name => Name_Address))); | |
725a69d2 | 4840 | end if; |
4841 | end if; | |
4842 | ||
4843 | -- Generate: Exname : constant String := full_qualified_name (typ); | |
343d35dc | 4844 | -- The type itself may be an anonymous parent type, so use the first |
4845 | -- subtype to have a user-recognizable name. | |
d62940bf | 4846 | |
343d35dc | 4847 | Append_To (Result, |
4848 | Make_Object_Declaration (Loc, | |
4849 | Defining_Identifier => Exname, | |
4850 | Constant_Present => True, | |
4851 | Object_Definition => New_Reference_To (Standard_String, Loc), | |
4852 | Expression => | |
4853 | Make_String_Literal (Loc, | |
c6a30f24 | 4854 | Fully_Qualified_Name_String (First_Subtype (Typ))))); |
d62940bf | 4855 | |
24971415 | 4856 | Set_Is_Statically_Allocated (Exname); |
4857 | Set_Is_True_Constant (Exname); | |
4858 | ||
e7e688dd | 4859 | -- Declare the object used by Ada.Tags.Register_Tag |
4860 | ||
4861 | if RTE_Available (RE_Register_Tag) then | |
4862 | Append_To (Result, | |
4863 | Make_Object_Declaration (Loc, | |
4864 | Defining_Identifier => HT_Link, | |
4865 | Object_Definition => New_Reference_To (RTE (RE_Tag), Loc))); | |
4866 | end if; | |
4867 | ||
725a69d2 | 4868 | -- Generate code to create the storage for the type specific data object |
4869 | -- with enough space to store the tags of the ancestors plus the tags | |
4870 | -- of all the implemented interfaces (as described in a-tags.adb). | |
4871 | ||
4872 | -- TSD : Type_Specific_Data (I_Depth) := | |
4873 | -- (Idepth => I_Depth, | |
4874 | -- Access_Level => Type_Access_Level (Typ), | |
208fd589 | 4875 | -- Alignment => Typ'Alignment, |
725a69d2 | 4876 | -- Expanded_Name => Cstring_Ptr!(Exname'Address)) |
4877 | -- External_Tag => Cstring_Ptr!(Exname'Address)) | |
e7e688dd | 4878 | -- HT_Link => HT_Link'Address, |
725a69d2 | 4879 | -- Transportable => <<boolean-value>>, |
3568e554 | 4880 | -- Type_Is_Abstract => <<boolean-value>>, |
bb3b440a | 4881 | -- Needs_Finalization => <<boolean-value>>, |
693b0822 | 4882 | -- [ Size_Func => Size_Prim'Access, ] |
4883 | -- [ Interfaces_Table => <<access-value>>, ] | |
24971415 | 4884 | -- [ SSD => SSD_Table'Address ] |
725a69d2 | 4885 | -- Tags_Table => (0 => null, |
4886 | -- 1 => Parent'Tag | |
4887 | -- ...); | |
4888 | -- for TSD'Alignment use Address'Alignment | |
4889 | ||
4890 | TSD_Aggr_List := New_List; | |
4891 | ||
4892 | -- Idepth: Count ancestors to compute the inheritance depth. For private | |
4893 | -- extensions, always go to the full view in order to compute the real | |
4894 | -- inheritance depth. | |
4895 | ||
4896 | declare | |
4897 | Current_Typ : Entity_Id; | |
4898 | Parent_Typ : Entity_Id; | |
4899 | ||
4900 | begin | |
4901 | I_Depth := 0; | |
4902 | Current_Typ := Typ; | |
4903 | loop | |
4904 | Parent_Typ := Etype (Current_Typ); | |
4905 | ||
4906 | if Is_Private_Type (Parent_Typ) then | |
4907 | Parent_Typ := Full_View (Base_Type (Parent_Typ)); | |
4908 | end if; | |
4909 | ||
4910 | exit when Parent_Typ = Current_Typ; | |
4911 | ||
4912 | I_Depth := I_Depth + 1; | |
4913 | Current_Typ := Parent_Typ; | |
4914 | end loop; | |
4915 | end; | |
4916 | ||
4917 | Append_To (TSD_Aggr_List, | |
17e14451 | 4918 | Make_Integer_Literal (Loc, I_Depth)); |
725a69d2 | 4919 | |
4920 | -- Access_Level | |
4921 | ||
4922 | Append_To (TSD_Aggr_List, | |
17e14451 | 4923 | Make_Integer_Literal (Loc, Type_Access_Level (Typ))); |
725a69d2 | 4924 | |
208fd589 | 4925 | -- Alignment |
4926 | ||
4927 | -- For CPP types we cannot rely on the value of 'Alignment provided | |
4928 | -- by the backend to initialize this TSD field. | |
4929 | ||
4930 | if Convention (Typ) = Convention_CPP | |
4931 | or else Is_CPP_Class (Root_Type (Typ)) | |
4932 | then | |
4933 | Append_To (TSD_Aggr_List, | |
4934 | Make_Integer_Literal (Loc, 0)); | |
4935 | else | |
4936 | Append_To (TSD_Aggr_List, | |
4937 | Make_Attribute_Reference (Loc, | |
4938 | Prefix => New_Reference_To (Typ, Loc), | |
4939 | Attribute_Name => Name_Alignment)); | |
4940 | end if; | |
4941 | ||
725a69d2 | 4942 | -- Expanded_Name |
4943 | ||
4944 | Append_To (TSD_Aggr_List, | |
17e14451 | 4945 | Unchecked_Convert_To (RTE (RE_Cstring_Ptr), |
4946 | Make_Attribute_Reference (Loc, | |
693b0822 | 4947 | Prefix => New_Reference_To (Exname, Loc), |
17e14451 | 4948 | Attribute_Name => Name_Address))); |
725a69d2 | 4949 | |
4950 | -- External_Tag of a local tagged type | |
4951 | ||
17e14451 | 4952 | -- <typ>A : constant String := |
725a69d2 | 4953 | -- "Internal tag at 16#tag-addr#: <full-name-of-typ>"; |
4954 | ||
4955 | -- The reason we generate this strange name is that we do not want to | |
4956 | -- enter local tagged types in the global hash table used to compute | |
4957 | -- the Internal_Tag attribute for two reasons: | |
4958 | ||
4959 | -- 1. It is hard to avoid a tasking race condition for entering the | |
4960 | -- entry into the hash table. | |
4961 | ||
4962 | -- 2. It would cause a storage leak, unless we rig up considerable | |
4963 | -- mechanism to remove the entry from the hash table on exit. | |
4964 | ||
4965 | -- So what we do is to generate the above external tag name, where the | |
4966 | -- hex address is the address of the local dispatch table (i.e. exactly | |
4967 | -- the value we want if Internal_Tag is computed from this string). | |
4968 | ||
4969 | -- Of course this value will only be valid if the tagged type is still | |
4970 | -- in scope, but it clearly must be erroneous to compute the internal | |
4971 | -- tag of a tagged type that is out of scope! | |
4972 | ||
17e14451 | 4973 | -- We don't do this processing if an explicit external tag has been |
4974 | -- specified. That's an odd case for which we have already issued a | |
4975 | -- warning, where we will not be able to compute the internal tag. | |
4976 | ||
4977 | if not Is_Library_Level_Entity (Typ) | |
4978 | and then not Has_External_Tag_Rep_Clause (Typ) | |
4979 | then | |
725a69d2 | 4980 | declare |
725a69d2 | 4981 | Exname : constant Entity_Id := |
17e14451 | 4982 | Make_Defining_Identifier (Loc, |
4983 | New_External_Name (Tname, 'A')); | |
4984 | ||
725a69d2 | 4985 | Full_Name : constant String_Id := |
c6a30f24 | 4986 | Fully_Qualified_Name_String (First_Subtype (Typ)); |
725a69d2 | 4987 | Str1_Id : String_Id; |
4988 | Str2_Id : String_Id; | |
725a69d2 | 4989 | |
4990 | begin | |
4991 | -- Generate: | |
17e14451 | 4992 | -- Str1 = "Internal tag at 16#"; |
725a69d2 | 4993 | |
4994 | Start_String; | |
4995 | Store_String_Chars ("Internal tag at 16#"); | |
4996 | Str1_Id := End_String; | |
4997 | ||
4998 | -- Generate: | |
17e14451 | 4999 | -- Str2 = "#: <type-full-name>"; |
725a69d2 | 5000 | |
5001 | Start_String; | |
5002 | Store_String_Chars ("#: "); | |
725a69d2 | 5003 | Store_String_Chars (Full_Name); |
17e14451 | 5004 | Str2_Id := End_String; |
725a69d2 | 5005 | |
5006 | -- Generate: | |
5007 | -- Exname : constant String := | |
17e14451 | 5008 | -- Str1 & Address_Image (Tag) & Str2; |
725a69d2 | 5009 | |
5010 | if RTE_Available (RE_Address_Image) then | |
5011 | Append_To (Result, | |
5012 | Make_Object_Declaration (Loc, | |
5013 | Defining_Identifier => Exname, | |
5014 | Constant_Present => True, | |
5015 | Object_Definition => New_Reference_To | |
5016 | (Standard_String, Loc), | |
5017 | Expression => | |
5018 | Make_Op_Concat (Loc, | |
5019 | Left_Opnd => | |
5020 | Make_String_Literal (Loc, Str1_Id), | |
5021 | Right_Opnd => | |
5022 | Make_Op_Concat (Loc, | |
5023 | Left_Opnd => | |
5024 | Make_Function_Call (Loc, | |
5025 | Name => | |
5026 | New_Reference_To | |
5027 | (RTE (RE_Address_Image), Loc), | |
5028 | Parameter_Associations => New_List ( | |
5029 | Unchecked_Convert_To (RTE (RE_Address), | |
5030 | New_Reference_To (DT_Ptr, Loc)))), | |
5031 | Right_Opnd => | |
17e14451 | 5032 | Make_String_Literal (Loc, Str2_Id))))); |
5033 | ||
725a69d2 | 5034 | else |
5035 | Append_To (Result, | |
5036 | Make_Object_Declaration (Loc, | |
5037 | Defining_Identifier => Exname, | |
5038 | Constant_Present => True, | |
5039 | Object_Definition => New_Reference_To | |
5040 | (Standard_String, Loc), | |
5041 | Expression => | |
5042 | Make_Op_Concat (Loc, | |
5043 | Left_Opnd => | |
5044 | Make_String_Literal (Loc, Str1_Id), | |
5045 | Right_Opnd => | |
17e14451 | 5046 | Make_String_Literal (Loc, Str2_Id)))); |
725a69d2 | 5047 | end if; |
5048 | ||
5049 | New_Node := | |
5050 | Unchecked_Convert_To (RTE (RE_Cstring_Ptr), | |
5051 | Make_Attribute_Reference (Loc, | |
5052 | Prefix => New_Reference_To (Exname, Loc), | |
5053 | Attribute_Name => Name_Address)); | |
5054 | end; | |
5055 | ||
5056 | -- External tag of a library-level tagged type: Check for a definition | |
5057 | -- of External_Tag. The clause is considered only if it applies to this | |
5058 | -- specific tagged type, as opposed to one of its ancestors. | |
cc60bd16 | 5059 | -- If the type is an unconstrained type extension, we are building the |
5060 | -- dispatch table of its anonymous base type, so the external tag, if | |
34fd8639 | 5061 | -- any was specified, must be retrieved from the first subtype. Go to |
5062 | -- the full view in case the clause is in the private part. | |
725a69d2 | 5063 | |
5064 | else | |
5065 | declare | |
cc60bd16 | 5066 | Def : constant Node_Id := Get_Attribute_Definition_Clause |
34fd8639 | 5067 | (Underlying_Type (First_Subtype (Typ)), |
cc60bd16 | 5068 | Attribute_External_Tag); |
5069 | ||
725a69d2 | 5070 | Old_Val : String_Id; |
5071 | New_Val : String_Id; | |
5072 | E : Entity_Id; | |
5073 | ||
5074 | begin | |
5075 | if not Present (Def) | |
cc60bd16 | 5076 | or else Entity (Name (Def)) /= First_Subtype (Typ) |
725a69d2 | 5077 | then |
5078 | New_Node := | |
5079 | Unchecked_Convert_To (RTE (RE_Cstring_Ptr), | |
5080 | Make_Attribute_Reference (Loc, | |
cc60bd16 | 5081 | Prefix => New_Reference_To (Exname, Loc), |
725a69d2 | 5082 | Attribute_Name => Name_Address)); |
5083 | else | |
5084 | Old_Val := Strval (Expr_Value_S (Expression (Def))); | |
5085 | ||
17e14451 | 5086 | -- For the rep clause "for <typ>'external_tag use y" generate: |
725a69d2 | 5087 | |
17e14451 | 5088 | -- <typ>A : constant string := y; |
5089 | -- | |
5090 | -- <typ>A'Address is used to set the External_Tag component | |
5091 | -- of the TSD | |
725a69d2 | 5092 | |
5093 | -- Create a new nul terminated string if it is not already | |
5094 | ||
5095 | if String_Length (Old_Val) > 0 | |
5096 | and then | |
5097 | Get_String_Char (Old_Val, String_Length (Old_Val)) = 0 | |
5098 | then | |
5099 | New_Val := Old_Val; | |
5100 | else | |
5101 | Start_String (Old_Val); | |
5102 | Store_String_Char (Get_Char_Code (ASCII.NUL)); | |
5103 | New_Val := End_String; | |
5104 | end if; | |
5105 | ||
5106 | E := Make_Defining_Identifier (Loc, | |
5107 | New_External_Name (Chars (Typ), 'A')); | |
5108 | ||
5109 | Append_To (Result, | |
5110 | Make_Object_Declaration (Loc, | |
5111 | Defining_Identifier => E, | |
5112 | Constant_Present => True, | |
5113 | Object_Definition => | |
5114 | New_Reference_To (Standard_String, Loc), | |
5115 | Expression => | |
5116 | Make_String_Literal (Loc, New_Val))); | |
5117 | ||
5118 | New_Node := | |
5119 | Unchecked_Convert_To (RTE (RE_Cstring_Ptr), | |
5120 | Make_Attribute_Reference (Loc, | |
5121 | Prefix => New_Reference_To (E, Loc), | |
5122 | Attribute_Name => Name_Address)); | |
5123 | end if; | |
5124 | end; | |
5125 | end if; | |
5126 | ||
17e14451 | 5127 | Append_To (TSD_Aggr_List, New_Node); |
725a69d2 | 5128 | |
5129 | -- HT_Link | |
5130 | ||
e7e688dd | 5131 | if RTE_Available (RE_Register_Tag) then |
5132 | Append_To (TSD_Aggr_List, | |
5133 | Unchecked_Convert_To (RTE (RE_Tag_Ptr), | |
5134 | Make_Attribute_Reference (Loc, | |
5135 | Prefix => New_Reference_To (HT_Link, Loc), | |
5136 | Attribute_Name => Name_Address))); | |
5137 | else | |
5138 | Append_To (TSD_Aggr_List, | |
5139 | Unchecked_Convert_To (RTE (RE_Tag_Ptr), | |
5140 | New_Reference_To (RTE (RE_Null_Address), Loc))); | |
5141 | end if; | |
725a69d2 | 5142 | |
5143 | -- Transportable: Set for types that can be used in remote calls | |
5144 | -- with respect to E.4(18) legality rules. | |
5145 | ||
17e14451 | 5146 | declare |
5147 | Transportable : Entity_Id; | |
725a69d2 | 5148 | |
17e14451 | 5149 | begin |
5150 | Transportable := | |
5151 | Boolean_Literals | |
5152 | (Is_Pure (Typ) | |
5153 | or else Is_Shared_Passive (Typ) | |
5154 | or else | |
5155 | ((Is_Remote_Types (Typ) | |
5156 | or else Is_Remote_Call_Interface (Typ)) | |
5157 | and then Original_View_In_Visible_Part (Typ)) | |
5158 | or else not Comes_From_Source (Typ)); | |
5159 | ||
5160 | Append_To (TSD_Aggr_List, | |
5161 | New_Occurrence_Of (Transportable, Loc)); | |
5162 | end; | |
725a69d2 | 5163 | |
3568e554 | 5164 | -- Type_Is_Abstract (Ada 2012: AI05-0173). This functionality is |
5165 | -- not available in the HIE runtime. | |
5166 | ||
5167 | if RTE_Record_Component_Available (RE_Type_Is_Abstract) then | |
5168 | declare | |
5169 | Type_Is_Abstract : Entity_Id; | |
5170 | ||
5171 | begin | |
5172 | Type_Is_Abstract := | |
5173 | Boolean_Literals (Is_Abstract_Type (Typ)); | |
5174 | ||
5175 | Append_To (TSD_Aggr_List, | |
5176 | New_Occurrence_Of (Type_Is_Abstract, Loc)); | |
5177 | end; | |
5178 | end if; | |
5179 | ||
bb3b440a | 5180 | -- Needs_Finalization: Set if the type is controlled or has controlled |
5181 | -- components. | |
952af0b9 | 5182 | |
17e14451 | 5183 | declare |
bb3b440a | 5184 | Needs_Fin : Entity_Id; |
343d35dc | 5185 | |
17e14451 | 5186 | begin |
bb3b440a | 5187 | Needs_Fin := Boolean_Literals (Needs_Finalization (Typ)); |
5188 | Append_To (TSD_Aggr_List, New_Occurrence_Of (Needs_Fin, Loc)); | |
17e14451 | 5189 | end; |
725a69d2 | 5190 | |
cc60bd16 | 5191 | -- Size_Func |
5192 | ||
5193 | if RTE_Record_Component_Available (RE_Size_Func) then | |
925c2ba1 | 5194 | |
5195 | -- Initialize this field to Null_Address if we are not building | |
5196 | -- static dispatch tables static or if the size function is not | |
5197 | -- available. In the former case we cannot initialize this field | |
5198 | -- until the function is frozen and registered in the dispatch | |
5199 | -- table (see Register_Primitive). | |
5200 | ||
5201 | if not Building_Static_DT (Typ) or else not Has_DT (Typ) then | |
cc60bd16 | 5202 | Append_To (TSD_Aggr_List, |
5203 | Unchecked_Convert_To (RTE (RE_Size_Ptr), | |
5204 | New_Reference_To (RTE (RE_Null_Address), Loc))); | |
5205 | ||
5206 | else | |
5207 | declare | |
5208 | Prim_Elmt : Elmt_Id; | |
5209 | Prim : Entity_Id; | |
fa6a6949 | 5210 | Size_Comp : Node_Id; |
cc60bd16 | 5211 | |
5212 | begin | |
5213 | Prim_Elmt := First_Elmt (Primitive_Operations (Typ)); | |
5214 | while Present (Prim_Elmt) loop | |
5215 | Prim := Node (Prim_Elmt); | |
5216 | ||
5217 | if Chars (Prim) = Name_uSize then | |
fc2907f6 | 5218 | Prim := Ultimate_Alias (Prim); |
cc60bd16 | 5219 | |
5220 | if Is_Abstract_Subprogram (Prim) then | |
fa6a6949 | 5221 | Size_Comp := |
cc60bd16 | 5222 | Unchecked_Convert_To (RTE (RE_Size_Ptr), |
fa6a6949 | 5223 | New_Reference_To (RTE (RE_Null_Address), Loc)); |
cc60bd16 | 5224 | else |
fa6a6949 | 5225 | Size_Comp := |
cc60bd16 | 5226 | Unchecked_Convert_To (RTE (RE_Size_Ptr), |
5227 | Make_Attribute_Reference (Loc, | |
5228 | Prefix => New_Reference_To (Prim, Loc), | |
fa6a6949 | 5229 | Attribute_Name => Name_Unrestricted_Access)); |
cc60bd16 | 5230 | end if; |
5231 | ||
5232 | exit; | |
5233 | end if; | |
5234 | ||
5235 | Next_Elmt (Prim_Elmt); | |
5236 | end loop; | |
fa6a6949 | 5237 | |
5238 | pragma Assert (Present (Size_Comp)); | |
5239 | Append_To (TSD_Aggr_List, Size_Comp); | |
cc60bd16 | 5240 | end; |
5241 | end if; | |
5242 | end if; | |
5243 | ||
725a69d2 | 5244 | -- Interfaces_Table (required for AI-405) |
5245 | ||
5246 | if RTE_Record_Component_Available (RE_Interfaces_Table) then | |
5247 | ||
5248 | -- Count the number of interface types implemented by Typ | |
5249 | ||
a652dd51 | 5250 | Collect_Interfaces (Typ, Typ_Ifaces); |
725a69d2 | 5251 | |
5252 | AI := First_Elmt (Typ_Ifaces); | |
5253 | while Present (AI) loop | |
5254 | Num_Ifaces := Num_Ifaces + 1; | |
5255 | Next_Elmt (AI); | |
5256 | end loop; | |
952af0b9 | 5257 | |
343d35dc | 5258 | if Num_Ifaces = 0 then |
725a69d2 | 5259 | Iface_Table_Node := Make_Null (Loc); |
952af0b9 | 5260 | |
725a69d2 | 5261 | -- Generate the Interface_Table object |
343d35dc | 5262 | |
5263 | else | |
725a69d2 | 5264 | declare |
17e14451 | 5265 | TSD_Ifaces_List : constant List_Id := New_List; |
cdb1c38f | 5266 | Elmt : Elmt_Id; |
5267 | Sec_DT_Tag : Node_Id; | |
725a69d2 | 5268 | |
5269 | begin | |
5270 | AI := First_Elmt (Typ_Ifaces); | |
5271 | while Present (AI) loop | |
cb4af01d | 5272 | if Is_Ancestor (Node (AI), Typ, Use_Full_View => True) then |
cdb1c38f | 5273 | Sec_DT_Tag := |
5274 | New_Reference_To (DT_Ptr, Loc); | |
5275 | else | |
acf97c11 | 5276 | Elmt := |
5277 | Next_Elmt | |
5278 | (Next_Elmt (First_Elmt (Access_Disp_Table (Typ)))); | |
cdb1c38f | 5279 | pragma Assert (Has_Thunks (Node (Elmt))); |
5280 | ||
d00681a7 | 5281 | while Is_Tag (Node (Elmt)) |
cdb1c38f | 5282 | and then not |
cb4af01d | 5283 | Is_Ancestor (Node (AI), Related_Type (Node (Elmt)), |
5284 | Use_Full_View => True) | |
cdb1c38f | 5285 | loop |
5286 | pragma Assert (Has_Thunks (Node (Elmt))); | |
5287 | Next_Elmt (Elmt); | |
acf97c11 | 5288 | pragma Assert (Has_Thunks (Node (Elmt))); |
5289 | Next_Elmt (Elmt); | |
5290 | pragma Assert (not Has_Thunks (Node (Elmt))); | |
5291 | Next_Elmt (Elmt); | |
cdb1c38f | 5292 | pragma Assert (not Has_Thunks (Node (Elmt))); |
5293 | Next_Elmt (Elmt); | |
5294 | end loop; | |
5295 | ||
5296 | pragma Assert (Ekind (Node (Elmt)) = E_Constant | |
acf97c11 | 5297 | and then not |
5298 | Has_Thunks (Node (Next_Elmt (Next_Elmt (Elmt))))); | |
cdb1c38f | 5299 | Sec_DT_Tag := |
acf97c11 | 5300 | New_Reference_To (Node (Next_Elmt (Next_Elmt (Elmt))), |
5301 | Loc); | |
cdb1c38f | 5302 | end if; |
5303 | ||
17e14451 | 5304 | Append_To (TSD_Ifaces_List, |
5305 | Make_Aggregate (Loc, | |
5306 | Expressions => New_List ( | |
5307 | ||
5308 | -- Iface_Tag | |
5309 | ||
24971415 | 5310 | Unchecked_Convert_To (RTE (RE_Tag), |
725a69d2 | 5311 | New_Reference_To |
5312 | (Node (First_Elmt (Access_Disp_Table (Node (AI)))), | |
17e14451 | 5313 | Loc)), |
725a69d2 | 5314 | |
17e14451 | 5315 | -- Static_Offset_To_Top |
725a69d2 | 5316 | |
17e14451 | 5317 | New_Reference_To (Standard_True, Loc), |
725a69d2 | 5318 | |
17e14451 | 5319 | -- Offset_To_Top_Value |
5320 | ||
5321 | Make_Integer_Literal (Loc, 0), | |
5322 | ||
5323 | -- Offset_To_Top_Func | |
5324 | ||
cdb1c38f | 5325 | Make_Null (Loc), |
5326 | ||
5327 | -- Secondary_DT | |
5328 | ||
5329 | Unchecked_Convert_To (RTE (RE_Tag), Sec_DT_Tag) | |
5330 | ||
5331 | ))); | |
725a69d2 | 5332 | |
725a69d2 | 5333 | Next_Elmt (AI); |
5334 | end loop; | |
725a69d2 | 5335 | |
17e14451 | 5336 | Name_ITable := New_External_Name (Tname, 'I'); |
5337 | ITable := Make_Defining_Identifier (Loc, Name_ITable); | |
2ea346ac | 5338 | Set_Is_Statically_Allocated (ITable, |
5339 | Is_Library_Level_Tagged_Type (Typ)); | |
725a69d2 | 5340 | |
17e14451 | 5341 | -- The table of interfaces is not constant; its slots are |
0c826ed4 | 5342 | -- filled at run time by the IP routine using attribute |
17e14451 | 5343 | -- 'Position to know the location of the tag components |
5344 | -- (and this attribute cannot be safely used before the | |
5345 | -- object is initialized). | |
725a69d2 | 5346 | |
17e14451 | 5347 | Append_To (Result, |
5348 | Make_Object_Declaration (Loc, | |
5349 | Defining_Identifier => ITable, | |
5350 | Aliased_Present => True, | |
5351 | Constant_Present => False, | |
5352 | Object_Definition => | |
5353 | Make_Subtype_Indication (Loc, | |
5354 | Subtype_Mark => | |
5355 | New_Reference_To (RTE (RE_Interface_Data), Loc), | |
5356 | Constraint => Make_Index_Or_Discriminant_Constraint | |
5357 | (Loc, | |
5358 | Constraints => New_List ( | |
5359 | Make_Integer_Literal (Loc, Num_Ifaces)))), | |
725a69d2 | 5360 | |
17e14451 | 5361 | Expression => Make_Aggregate (Loc, |
5362 | Expressions => New_List ( | |
5363 | Make_Integer_Literal (Loc, Num_Ifaces), | |
5364 | Make_Aggregate (Loc, | |
5365 | Expressions => TSD_Ifaces_List))))); | |
725a69d2 | 5366 | |
17e14451 | 5367 | Append_To (Result, |
5368 | Make_Attribute_Definition_Clause (Loc, | |
5369 | Name => New_Reference_To (ITable, Loc), | |
5370 | Chars => Name_Alignment, | |
5371 | Expression => | |
5372 | Make_Attribute_Reference (Loc, | |
5373 | Prefix => | |
5374 | New_Reference_To (RTE (RE_Integer_Address), Loc), | |
5375 | Attribute_Name => Name_Alignment))); | |
725a69d2 | 5376 | |
17e14451 | 5377 | Iface_Table_Node := |
5378 | Make_Attribute_Reference (Loc, | |
5379 | Prefix => New_Reference_To (ITable, Loc), | |
5380 | Attribute_Name => Name_Unchecked_Access); | |
5381 | end; | |
725a69d2 | 5382 | end if; |
5383 | ||
17e14451 | 5384 | Append_To (TSD_Aggr_List, Iface_Table_Node); |
725a69d2 | 5385 | end if; |
5386 | ||
5387 | -- Generate the Select Specific Data table for synchronized types that | |
5388 | -- implement synchronized interfaces. The size of the table is | |
5389 | -- constrained by the number of non-predefined primitive operations. | |
5390 | ||
5391 | if RTE_Record_Component_Available (RE_SSD) then | |
de54c5ab | 5392 | if Ada_Version >= Ada_2005 |
24971415 | 5393 | and then Has_DT (Typ) |
725a69d2 | 5394 | and then Is_Concurrent_Record_Type (Typ) |
a652dd51 | 5395 | and then Has_Interfaces (Typ) |
725a69d2 | 5396 | and then Nb_Prim > 0 |
5397 | and then not Is_Abstract_Type (Typ) | |
5398 | and then not Is_Controlled (Typ) | |
5399 | and then not Restriction_Active (No_Dispatching_Calls) | |
f38c8084 | 5400 | and then not Restriction_Active (No_Select_Statements) |
725a69d2 | 5401 | then |
343d35dc | 5402 | Append_To (Result, |
5403 | Make_Object_Declaration (Loc, | |
725a69d2 | 5404 | Defining_Identifier => SSD, |
343d35dc | 5405 | Aliased_Present => True, |
5406 | Object_Definition => | |
5407 | Make_Subtype_Indication (Loc, | |
725a69d2 | 5408 | Subtype_Mark => New_Reference_To ( |
5409 | RTE (RE_Select_Specific_Data), Loc), | |
5410 | Constraint => | |
5411 | Make_Index_Or_Discriminant_Constraint (Loc, | |
5412 | Constraints => New_List ( | |
5413 | Make_Integer_Literal (Loc, Nb_Prim)))))); | |
5414 | ||
17e14451 | 5415 | Append_To (Result, |
5416 | Make_Attribute_Definition_Clause (Loc, | |
5417 | Name => New_Reference_To (SSD, Loc), | |
5418 | Chars => Name_Alignment, | |
5419 | Expression => | |
5420 | Make_Attribute_Reference (Loc, | |
5421 | Prefix => | |
5422 | New_Reference_To (RTE (RE_Integer_Address), Loc), | |
5423 | Attribute_Name => Name_Alignment))); | |
5424 | ||
725a69d2 | 5425 | -- This table is initialized by Make_Select_Specific_Data_Table, |
5426 | -- which calls Set_Entry_Index and Set_Prim_Op_Kind. | |
5427 | ||
5428 | Append_To (TSD_Aggr_List, | |
17e14451 | 5429 | Make_Attribute_Reference (Loc, |
5430 | Prefix => New_Reference_To (SSD, Loc), | |
5431 | Attribute_Name => Name_Unchecked_Access)); | |
725a69d2 | 5432 | else |
17e14451 | 5433 | Append_To (TSD_Aggr_List, Make_Null (Loc)); |
343d35dc | 5434 | end if; |
952af0b9 | 5435 | end if; |
5436 | ||
725a69d2 | 5437 | -- Initialize the table of ancestor tags. In case of interface types |
5438 | -- this table is not needed. | |
d62940bf | 5439 | |
cc60bd16 | 5440 | TSD_Tags_List := New_List; |
952af0b9 | 5441 | |
cc60bd16 | 5442 | -- If we are not statically allocating the dispatch table then we must |
5443 | -- fill position 0 with null because we still have not generated the | |
5444 | -- tag of Typ. | |
343d35dc | 5445 | |
cc60bd16 | 5446 | if not Building_Static_DT (Typ) |
5447 | or else Is_Interface (Typ) | |
5448 | then | |
5449 | Append_To (TSD_Tags_List, | |
5450 | Unchecked_Convert_To (RTE (RE_Tag), | |
5451 | New_Reference_To (RTE (RE_Null_Address), Loc))); | |
343d35dc | 5452 | |
cc60bd16 | 5453 | -- Otherwise we can safely reference the tag |
343d35dc | 5454 | |
cc60bd16 | 5455 | else |
5456 | Append_To (TSD_Tags_List, | |
5457 | New_Reference_To (DT_Ptr, Loc)); | |
5458 | end if; | |
343d35dc | 5459 | |
cc60bd16 | 5460 | -- Fill the rest of the table with the tags of the ancestors |
343d35dc | 5461 | |
cc60bd16 | 5462 | declare |
5463 | Current_Typ : Entity_Id; | |
5464 | Parent_Typ : Entity_Id; | |
5465 | Pos : Nat; | |
725a69d2 | 5466 | |
cc60bd16 | 5467 | begin |
17e14451 | 5468 | Pos := 1; |
5469 | Current_Typ := Typ; | |
725a69d2 | 5470 | |
17e14451 | 5471 | loop |
5472 | Parent_Typ := Etype (Current_Typ); | |
343d35dc | 5473 | |
17e14451 | 5474 | if Is_Private_Type (Parent_Typ) then |
5475 | Parent_Typ := Full_View (Base_Type (Parent_Typ)); | |
5476 | end if; | |
5477 | ||
5478 | exit when Parent_Typ = Current_Typ; | |
5479 | ||
7ac0f4a5 | 5480 | if Is_CPP_Class (Parent_Typ) then |
5481 | ||
17e14451 | 5482 | -- The tags defined in the C++ side will be inherited when |
5483 | -- the object is constructed (Exp_Ch3.Build_Init_Procedure) | |
5484 | ||
5485 | Append_To (TSD_Tags_List, | |
5486 | Unchecked_Convert_To (RTE (RE_Tag), | |
5487 | New_Reference_To (RTE (RE_Null_Address), Loc))); | |
5488 | else | |
5489 | Append_To (TSD_Tags_List, | |
5490 | New_Reference_To | |
5491 | (Node (First_Elmt (Access_Disp_Table (Parent_Typ))), | |
5492 | Loc)); | |
5493 | end if; | |
5494 | ||
5495 | Pos := Pos + 1; | |
5496 | Current_Typ := Parent_Typ; | |
5497 | end loop; | |
5498 | ||
5499 | pragma Assert (Pos = I_Depth + 1); | |
5500 | end; | |
5501 | ||
5502 | Append_To (TSD_Aggr_List, | |
5503 | Make_Aggregate (Loc, | |
5504 | Expressions => TSD_Tags_List)); | |
343d35dc | 5505 | |
725a69d2 | 5506 | -- Build the TSD object |
343d35dc | 5507 | |
5508 | Append_To (Result, | |
5509 | Make_Object_Declaration (Loc, | |
5510 | Defining_Identifier => TSD, | |
5511 | Aliased_Present => True, | |
24971415 | 5512 | Constant_Present => Building_Static_DT (Typ), |
343d35dc | 5513 | Object_Definition => |
5514 | Make_Subtype_Indication (Loc, | |
5515 | Subtype_Mark => New_Reference_To ( | |
5516 | RTE (RE_Type_Specific_Data), Loc), | |
5517 | Constraint => | |
5518 | Make_Index_Or_Discriminant_Constraint (Loc, | |
5519 | Constraints => New_List ( | |
5520 | Make_Integer_Literal (Loc, I_Depth)))), | |
725a69d2 | 5521 | |
343d35dc | 5522 | Expression => Make_Aggregate (Loc, |
17e14451 | 5523 | Expressions => TSD_Aggr_List))); |
343d35dc | 5524 | |
24971415 | 5525 | Set_Is_True_Constant (TSD, Building_Static_DT (Typ)); |
5526 | ||
343d35dc | 5527 | Append_To (Result, |
5528 | Make_Attribute_Definition_Clause (Loc, | |
5529 | Name => New_Reference_To (TSD, Loc), | |
5530 | Chars => Name_Alignment, | |
5531 | Expression => | |
5532 | Make_Attribute_Reference (Loc, | |
5533 | Prefix => New_Reference_To (RTE (RE_Integer_Address), Loc), | |
5534 | Attribute_Name => Name_Alignment))); | |
5535 | ||
24971415 | 5536 | -- Initialize or declare the dispatch table object |
343d35dc | 5537 | |
24971415 | 5538 | if not Has_DT (Typ) then |
725a69d2 | 5539 | DT_Constr_List := New_List; |
5540 | DT_Aggr_List := New_List; | |
343d35dc | 5541 | |
725a69d2 | 5542 | -- Typeinfo |
952af0b9 | 5543 | |
725a69d2 | 5544 | New_Node := |
5545 | Make_Attribute_Reference (Loc, | |
5546 | Prefix => New_Reference_To (TSD, Loc), | |
5547 | Attribute_Name => Name_Address); | |
5548 | ||
5549 | Append_To (DT_Constr_List, New_Node); | |
5550 | Append_To (DT_Aggr_List, New_Copy (New_Node)); | |
5551 | Append_To (DT_Aggr_List, Make_Integer_Literal (Loc, 0)); | |
5552 | ||
5553 | -- In case of locally defined tagged types we have already declared | |
5554 | -- and uninitialized object for the dispatch table, which is now | |
24971415 | 5555 | -- initialized by means of the following assignment: |
5556 | ||
5557 | -- DT := (TSD'Address, 0); | |
725a69d2 | 5558 | |
24971415 | 5559 | if not Building_Static_DT (Typ) then |
725a69d2 | 5560 | Append_To (Result, |
5561 | Make_Assignment_Statement (Loc, | |
5562 | Name => New_Reference_To (DT, Loc), | |
5563 | Expression => Make_Aggregate (Loc, | |
5564 | Expressions => DT_Aggr_List))); | |
5565 | ||
24971415 | 5566 | -- In case of library level tagged types we declare and export now |
5567 | -- the constant object containing the dummy dispatch table. There | |
5568 | -- is no need to declare the tag here because it has been previously | |
5569 | -- declared by Make_Tags | |
5570 | ||
5571 | -- DT : aliased constant No_Dispatch_Table := | |
5572 | -- (NDT_TSD => TSD'Address; | |
5573 | -- NDT_Prims_Ptr => 0); | |
5574 | -- for DT'Alignment use Address'Alignment; | |
725a69d2 | 5575 | |
5576 | else | |
5577 | Append_To (Result, | |
5578 | Make_Object_Declaration (Loc, | |
5579 | Defining_Identifier => DT, | |
5580 | Aliased_Present => True, | |
17e14451 | 5581 | Constant_Present => True, |
725a69d2 | 5582 | Object_Definition => |
5583 | New_Reference_To (RTE (RE_No_Dispatch_Table_Wrapper), Loc), | |
5584 | Expression => Make_Aggregate (Loc, | |
5585 | Expressions => DT_Aggr_List))); | |
5586 | ||
17e14451 | 5587 | Append_To (Result, |
5588 | Make_Attribute_Definition_Clause (Loc, | |
5589 | Name => New_Reference_To (DT, Loc), | |
5590 | Chars => Name_Alignment, | |
5591 | Expression => | |
5592 | Make_Attribute_Reference (Loc, | |
5593 | Prefix => | |
5594 | New_Reference_To (RTE (RE_Integer_Address), Loc), | |
5595 | Attribute_Name => Name_Alignment))); | |
5596 | ||
24971415 | 5597 | Export_DT (Typ, DT); |
725a69d2 | 5598 | end if; |
5599 | ||
5600 | -- Common case: Typ has a dispatch table | |
5601 | ||
5602 | -- Generate: | |
5603 | ||
5604 | -- Predef_Prims : Address_Array (1 .. Default_Prim_Ops_Count) := | |
5605 | -- (predef-prim-op-1'address, | |
5606 | -- predef-prim-op-2'address, | |
5607 | -- ... | |
5608 | -- predef-prim-op-n'address); | |
5609 | -- for Predef_Prims'Alignment use Address'Alignment | |
5610 | ||
5611 | -- DT : Dispatch_Table (Nb_Prims) := | |
5612 | -- (Signature => <sig-value>, | |
5613 | -- Tag_Kind => <tag_kind-value>, | |
5614 | -- Predef_Prims => Predef_Prims'First'Address, | |
5615 | -- Offset_To_Top => 0, | |
5616 | -- TSD => TSD'Address; | |
5617 | -- Prims_Ptr => (prim-op-1'address, | |
5618 | -- prim-op-2'address, | |
5619 | -- ... | |
5620 | -- prim-op-n'address)); | |
17e14451 | 5621 | -- for DT'Alignment use Address'Alignment |
725a69d2 | 5622 | |
5623 | else | |
5624 | declare | |
5625 | Pos : Nat; | |
5626 | ||
5627 | begin | |
24971415 | 5628 | if not Building_Static_DT (Typ) then |
725a69d2 | 5629 | Nb_Predef_Prims := Max_Predef_Prims; |
5630 | ||
5631 | else | |
5632 | Prim_Elmt := First_Elmt (Primitive_Operations (Typ)); | |
5633 | while Present (Prim_Elmt) loop | |
5634 | Prim := Node (Prim_Elmt); | |
5635 | ||
5636 | if Is_Predefined_Dispatching_Operation (Prim) | |
5637 | and then not Is_Abstract_Subprogram (Prim) | |
5638 | then | |
5639 | Pos := UI_To_Int (DT_Position (Prim)); | |
5640 | ||
5641 | if Pos > Nb_Predef_Prims then | |
5642 | Nb_Predef_Prims := Pos; | |
5643 | end if; | |
5644 | end if; | |
5645 | ||
5646 | Next_Elmt (Prim_Elmt); | |
5647 | end loop; | |
5648 | end if; | |
5649 | ||
5650 | declare | |
5651 | Prim_Table : array | |
5652 | (Nat range 1 .. Nb_Predef_Prims) of Entity_Id; | |
cc60bd16 | 5653 | Decl : Node_Id; |
725a69d2 | 5654 | E : Entity_Id; |
5655 | ||
5656 | begin | |
5657 | Prim_Ops_Aggr_List := New_List; | |
5658 | ||
5659 | Prim_Table := (others => Empty); | |
17e14451 | 5660 | |
cdb1c38f | 5661 | if Building_Static_DT (Typ) then |
5662 | Prim_Elmt := First_Elmt (Primitive_Operations (Typ)); | |
5663 | while Present (Prim_Elmt) loop | |
5664 | Prim := Node (Prim_Elmt); | |
725a69d2 | 5665 | |
cdb1c38f | 5666 | if Is_Predefined_Dispatching_Operation (Prim) |
5667 | and then not Is_Abstract_Subprogram (Prim) | |
3f8cf2d2 | 5668 | and then not Is_Eliminated (Prim) |
cdb1c38f | 5669 | and then not Present (Prim_Table |
5670 | (UI_To_Int (DT_Position (Prim)))) | |
5671 | then | |
fc2907f6 | 5672 | E := Ultimate_Alias (Prim); |
cdb1c38f | 5673 | pragma Assert (not Is_Abstract_Subprogram (E)); |
5674 | Prim_Table (UI_To_Int (DT_Position (Prim))) := E; | |
5675 | end if; | |
725a69d2 | 5676 | |
cdb1c38f | 5677 | Next_Elmt (Prim_Elmt); |
5678 | end loop; | |
5679 | end if; | |
725a69d2 | 5680 | |
5681 | for J in Prim_Table'Range loop | |
5682 | if Present (Prim_Table (J)) then | |
5683 | New_Node := | |
cc60bd16 | 5684 | Unchecked_Convert_To (RTE (RE_Prim_Ptr), |
acf97c11 | 5685 | Make_Attribute_Reference (Loc, |
5686 | Prefix => New_Reference_To (Prim_Table (J), Loc), | |
5687 | Attribute_Name => Name_Unrestricted_Access)); | |
725a69d2 | 5688 | else |
cc60bd16 | 5689 | New_Node := Make_Null (Loc); |
725a69d2 | 5690 | end if; |
5691 | ||
5692 | Append_To (Prim_Ops_Aggr_List, New_Node); | |
5693 | end loop; | |
343d35dc | 5694 | |
cc60bd16 | 5695 | New_Node := |
5696 | Make_Aggregate (Loc, | |
5697 | Expressions => Prim_Ops_Aggr_List); | |
5698 | ||
5699 | Decl := | |
5700 | Make_Subtype_Declaration (Loc, | |
ec97ce79 | 5701 | Defining_Identifier => Make_Temporary (Loc, 'S'), |
5702 | Subtype_Indication => | |
cc60bd16 | 5703 | New_Reference_To (RTE (RE_Address_Array), Loc)); |
5704 | ||
5705 | Append_To (Result, Decl); | |
5706 | ||
68f95949 | 5707 | Append_To (Result, |
5708 | Make_Object_Declaration (Loc, | |
725a69d2 | 5709 | Defining_Identifier => Predef_Prims, |
68f95949 | 5710 | Aliased_Present => True, |
24971415 | 5711 | Constant_Present => Building_Static_DT (Typ), |
cc60bd16 | 5712 | Object_Definition => New_Reference_To |
5713 | (Defining_Identifier (Decl), Loc), | |
5714 | Expression => New_Node)); | |
5715 | ||
5716 | -- Remember aggregates initializing dispatch tables | |
5717 | ||
5718 | Append_Elmt (New_Node, DT_Aggr); | |
725a69d2 | 5719 | |
5720 | Append_To (Result, | |
5721 | Make_Attribute_Definition_Clause (Loc, | |
5722 | Name => New_Reference_To (Predef_Prims, Loc), | |
5723 | Chars => Name_Alignment, | |
5724 | Expression => | |
5725 | Make_Attribute_Reference (Loc, | |
5726 | Prefix => | |
5727 | New_Reference_To (RTE (RE_Integer_Address), Loc), | |
5728 | Attribute_Name => Name_Alignment))); | |
5729 | end; | |
5730 | end; | |
5731 | ||
5732 | -- Stage 1: Initialize the discriminant and the record components | |
5733 | ||
5734 | DT_Constr_List := New_List; | |
5735 | DT_Aggr_List := New_List; | |
5736 | ||
5737 | -- Num_Prims. If the tagged type has no primitives we add a dummy | |
5738 | -- slot whose address will be the tag of this type. | |
5739 | ||
5740 | if Nb_Prim = 0 then | |
5741 | New_Node := Make_Integer_Literal (Loc, 1); | |
5742 | else | |
5743 | New_Node := Make_Integer_Literal (Loc, Nb_Prim); | |
5744 | end if; | |
5745 | ||
5746 | Append_To (DT_Constr_List, New_Node); | |
5747 | Append_To (DT_Aggr_List, New_Copy (New_Node)); | |
5748 | ||
5749 | -- Signature | |
5750 | ||
5751 | if RTE_Record_Component_Available (RE_Signature) then | |
5752 | Append_To (DT_Aggr_List, | |
5753 | New_Reference_To (RTE (RE_Primary_DT), Loc)); | |
5754 | end if; | |
5755 | ||
5756 | -- Tag_Kind | |
5757 | ||
5758 | if RTE_Record_Component_Available (RE_Tag_Kind) then | |
5759 | Append_To (DT_Aggr_List, Tagged_Kind (Typ)); | |
5760 | end if; | |
5761 | ||
5762 | -- Predef_Prims | |
5763 | ||
5764 | Append_To (DT_Aggr_List, | |
5765 | Make_Attribute_Reference (Loc, | |
5766 | Prefix => New_Reference_To (Predef_Prims, Loc), | |
5767 | Attribute_Name => Name_Address)); | |
5768 | ||
5769 | -- Offset_To_Top | |
5770 | ||
cc60bd16 | 5771 | Append_To (DT_Aggr_List, Make_Integer_Literal (Loc, 0)); |
725a69d2 | 5772 | |
5773 | -- Typeinfo | |
5774 | ||
5775 | Append_To (DT_Aggr_List, | |
5776 | Make_Attribute_Reference (Loc, | |
5777 | Prefix => New_Reference_To (TSD, Loc), | |
5778 | Attribute_Name => Name_Address)); | |
5779 | ||
5780 | -- Stage 2: Initialize the table of primitive operations | |
5781 | ||
5782 | Prim_Ops_Aggr_List := New_List; | |
5783 | ||
5784 | if Nb_Prim = 0 then | |
cc60bd16 | 5785 | Append_To (Prim_Ops_Aggr_List, Make_Null (Loc)); |
725a69d2 | 5786 | |
9a479e51 | 5787 | elsif not Building_Static_DT (Typ) then |
725a69d2 | 5788 | for J in 1 .. Nb_Prim loop |
cc60bd16 | 5789 | Append_To (Prim_Ops_Aggr_List, Make_Null (Loc)); |
725a69d2 | 5790 | end loop; |
5791 | ||
5792 | else | |
5793 | declare | |
d00681a7 | 5794 | CPP_Nb_Prims : constant Nat := CPP_Num_Prims (Typ); |
5795 | E : Entity_Id; | |
5796 | Prim : Entity_Id; | |
5797 | Prim_Elmt : Elmt_Id; | |
5798 | Prim_Pos : Nat; | |
5799 | Prim_Table : array (Nat range 1 .. Nb_Prim) of Entity_Id; | |
725a69d2 | 5800 | |
5801 | begin | |
5802 | Prim_Table := (others => Empty); | |
cdb1c38f | 5803 | |
5804 | Prim_Elmt := First_Elmt (Primitive_Operations (Typ)); | |
725a69d2 | 5805 | while Present (Prim_Elmt) loop |
5806 | Prim := Node (Prim_Elmt); | |
5807 | ||
9429b6e9 | 5808 | -- Retrieve the ultimate alias of the primitive for proper |
5809 | -- handling of renamings and eliminated primitives. | |
5810 | ||
d00681a7 | 5811 | E := Ultimate_Alias (Prim); |
5812 | Prim_Pos := UI_To_Int (DT_Position (E)); | |
9429b6e9 | 5813 | |
3f8cf2d2 | 5814 | -- Do not reference predefined primitives because they are |
5815 | -- located in a separate dispatch table; skip entities with | |
5816 | -- attribute Interface_Alias because they are only required | |
d00681a7 | 5817 | -- to build secondary dispatch tables; skip abstract and |
5818 | -- eliminated primitives; for derivations of CPP types skip | |
5819 | -- primitives located in the C++ part of the dispatch table | |
5820 | -- because their slot is initialized by the IC routine. | |
725a69d2 | 5821 | |
3f8cf2d2 | 5822 | if not Is_Predefined_Dispatching_Operation (Prim) |
5823 | and then not Is_Predefined_Dispatching_Operation (E) | |
5824 | and then not Present (Interface_Alias (Prim)) | |
5825 | and then not Is_Abstract_Subprogram (E) | |
3f8cf2d2 | 5826 | and then not Is_Eliminated (E) |
d00681a7 | 5827 | and then (not Is_CPP_Class (Root_Type (Typ)) |
5828 | or else Prim_Pos > CPP_Nb_Prims) | |
3f8cf2d2 | 5829 | then |
5830 | pragma Assert | |
5831 | (UI_To_Int (DT_Position (Prim)) <= Nb_Prim); | |
5832 | ||
5833 | Prim_Table (UI_To_Int (DT_Position (Prim))) := E; | |
725a69d2 | 5834 | end if; |
5835 | ||
5836 | Next_Elmt (Prim_Elmt); | |
5837 | end loop; | |
5838 | ||
5839 | for J in Prim_Table'Range loop | |
5840 | if Present (Prim_Table (J)) then | |
5841 | New_Node := | |
cc60bd16 | 5842 | Unchecked_Convert_To (RTE (RE_Prim_Ptr), |
acf97c11 | 5843 | Make_Attribute_Reference (Loc, |
5844 | Prefix => New_Reference_To (Prim_Table (J), Loc), | |
5845 | Attribute_Name => Name_Unrestricted_Access)); | |
725a69d2 | 5846 | else |
cc60bd16 | 5847 | New_Node := Make_Null (Loc); |
725a69d2 | 5848 | end if; |
5849 | ||
5850 | Append_To (Prim_Ops_Aggr_List, New_Node); | |
5851 | end loop; | |
5852 | end; | |
5853 | end if; | |
5854 | ||
cc60bd16 | 5855 | New_Node := |
725a69d2 | 5856 | Make_Aggregate (Loc, |
cc60bd16 | 5857 | Expressions => Prim_Ops_Aggr_List); |
5858 | ||
5859 | Append_To (DT_Aggr_List, New_Node); | |
5860 | ||
5861 | -- Remember aggregates initializing dispatch tables | |
5862 | ||
5863 | Append_Elmt (New_Node, DT_Aggr); | |
725a69d2 | 5864 | |
5865 | -- In case of locally defined tagged types we have already declared | |
5866 | -- and uninitialized object for the dispatch table, which is now | |
5867 | -- initialized by means of an assignment. | |
5868 | ||
24971415 | 5869 | if not Building_Static_DT (Typ) then |
725a69d2 | 5870 | Append_To (Result, |
5871 | Make_Assignment_Statement (Loc, | |
5872 | Name => New_Reference_To (DT, Loc), | |
5873 | Expression => Make_Aggregate (Loc, | |
5874 | Expressions => DT_Aggr_List))); | |
5875 | ||
24971415 | 5876 | -- In case of library level tagged types we declare now and export |
5877 | -- the constant object containing the dispatch table. | |
725a69d2 | 5878 | |
5879 | else | |
5880 | Append_To (Result, | |
5881 | Make_Object_Declaration (Loc, | |
5882 | Defining_Identifier => DT, | |
5883 | Aliased_Present => True, | |
17e14451 | 5884 | Constant_Present => True, |
725a69d2 | 5885 | Object_Definition => |
5886 | Make_Subtype_Indication (Loc, | |
5887 | Subtype_Mark => New_Reference_To | |
5888 | (RTE (RE_Dispatch_Table_Wrapper), Loc), | |
5889 | Constraint => Make_Index_Or_Discriminant_Constraint (Loc, | |
5890 | Constraints => DT_Constr_List)), | |
5891 | Expression => Make_Aggregate (Loc, | |
5892 | Expressions => DT_Aggr_List))); | |
5893 | ||
5894 | Append_To (Result, | |
5895 | Make_Attribute_Definition_Clause (Loc, | |
5896 | Name => New_Reference_To (DT, Loc), | |
5897 | Chars => Name_Alignment, | |
5898 | Expression => | |
5899 | Make_Attribute_Reference (Loc, | |
5900 | Prefix => | |
5901 | New_Reference_To (RTE (RE_Integer_Address), Loc), | |
5902 | Attribute_Name => Name_Alignment))); | |
5903 | ||
24971415 | 5904 | Export_DT (Typ, DT); |
952af0b9 | 5905 | end if; |
76a1c25b | 5906 | end if; |
d62940bf | 5907 | |
f301a57b | 5908 | -- Initialize the table of ancestor tags if not building static |
5909 | -- dispatch table | |
725a69d2 | 5910 | |
24971415 | 5911 | if not Building_Static_DT (Typ) |
17e14451 | 5912 | and then not Is_Interface (Typ) |
725a69d2 | 5913 | and then not Is_CPP_Class (Typ) |
5914 | then | |
5915 | Append_To (Result, | |
5916 | Make_Assignment_Statement (Loc, | |
5917 | Name => | |
5918 | Make_Indexed_Component (Loc, | |
5919 | Prefix => | |
5920 | Make_Selected_Component (Loc, | |
5921 | Prefix => | |
5922 | New_Reference_To (TSD, Loc), | |
5923 | Selector_Name => | |
5924 | New_Reference_To | |
5925 | (RTE_Record_Component (RE_Tags_Table), Loc)), | |
5926 | Expressions => | |
5927 | New_List (Make_Integer_Literal (Loc, 0))), | |
5928 | ||
5929 | Expression => | |
5930 | New_Reference_To | |
5931 | (Node (First_Elmt (Access_Disp_Table (Typ))), Loc))); | |
5932 | end if; | |
5933 | ||
f301a57b | 5934 | -- Inherit the dispatch tables of the parent. There is no need to |
5935 | -- inherit anything from the parent when building static dispatch tables | |
5936 | -- because the whole dispatch table (including inherited primitives) has | |
5937 | -- been already built. | |
acf97c11 | 5938 | |
9a479e51 | 5939 | if Building_Static_DT (Typ) then |
725a69d2 | 5940 | null; |
5941 | ||
af647dc7 | 5942 | -- If the ancestor is a CPP_Class type we inherit the dispatch tables |
5943 | -- in the init proc, and we don't need to fill them in here. | |
d62940bf | 5944 | |
cc60bd16 | 5945 | elsif Is_CPP_Class (Parent_Typ) then |
af647dc7 | 5946 | null; |
d62940bf | 5947 | |
acf97c11 | 5948 | -- Otherwise we fill in the dispatch tables here |
d62940bf | 5949 | |
af647dc7 | 5950 | else |
cc60bd16 | 5951 | if Typ /= Parent_Typ |
af647dc7 | 5952 | and then not Is_Interface (Typ) |
5953 | and then not Restriction_Active (No_Dispatching_Calls) | |
68f95949 | 5954 | then |
343d35dc | 5955 | -- Inherit the dispatch table |
d62940bf | 5956 | |
acf97c11 | 5957 | if not Is_Interface (Typ) |
cc60bd16 | 5958 | and then not Is_Interface (Parent_Typ) |
5959 | and then not Is_CPP_Class (Parent_Typ) | |
acf97c11 | 5960 | then |
5961 | declare | |
5962 | Nb_Prims : constant Int := | |
5963 | UI_To_Int (DT_Entry_Count | |
cc60bd16 | 5964 | (First_Tag_Component (Parent_Typ))); |
5965 | ||
acf97c11 | 5966 | begin |
5967 | Append_To (Elab_Code, | |
5968 | Build_Inherit_Predefined_Prims (Loc, | |
5969 | Old_Tag_Node => | |
5970 | New_Reference_To | |
5971 | (Node | |
5972 | (Next_Elmt | |
5973 | (First_Elmt | |
cc60bd16 | 5974 | (Access_Disp_Table (Parent_Typ)))), Loc), |
acf97c11 | 5975 | New_Tag_Node => |
5976 | New_Reference_To | |
5977 | (Node | |
5978 | (Next_Elmt | |
5979 | (First_Elmt | |
5980 | (Access_Disp_Table (Typ)))), Loc))); | |
5981 | ||
5982 | if Nb_Prims /= 0 then | |
725a69d2 | 5983 | Append_To (Elab_Code, |
acf97c11 | 5984 | Build_Inherit_Prims (Loc, |
5985 | Typ => Typ, | |
5986 | Old_Tag_Node => | |
5987 | New_Reference_To | |
5988 | (Node | |
5989 | (First_Elmt | |
cc60bd16 | 5990 | (Access_Disp_Table (Parent_Typ))), Loc), |
acf97c11 | 5991 | New_Tag_Node => New_Reference_To (DT_Ptr, Loc), |
5992 | Num_Prims => Nb_Prims)); | |
5993 | end if; | |
5994 | end; | |
af647dc7 | 5995 | end if; |
d62940bf | 5996 | |
af647dc7 | 5997 | -- Inherit the secondary dispatch tables of the ancestor |
d62940bf | 5998 | |
cc60bd16 | 5999 | if not Is_CPP_Class (Parent_Typ) then |
af647dc7 | 6000 | declare |
6001 | Sec_DT_Ancestor : Elmt_Id := | |
6002 | Next_Elmt | |
acf97c11 | 6003 | (Next_Elmt |
af647dc7 | 6004 | (First_Elmt |
cc60bd16 | 6005 | (Access_Disp_Table (Parent_Typ)))); |
af647dc7 | 6006 | Sec_DT_Typ : Elmt_Id := |
6007 | Next_Elmt | |
acf97c11 | 6008 | (Next_Elmt |
6009 | (First_Elmt | |
6010 | (Access_Disp_Table (Typ)))); | |
af647dc7 | 6011 | |
6012 | procedure Copy_Secondary_DTs (Typ : Entity_Id); | |
6013 | -- Local procedure required to climb through the ancestors | |
6014 | -- and copy the contents of all their secondary dispatch | |
6015 | -- tables. | |
6016 | ||
6017 | ------------------------ | |
6018 | -- Copy_Secondary_DTs -- | |
6019 | ------------------------ | |
6020 | ||
6021 | procedure Copy_Secondary_DTs (Typ : Entity_Id) is | |
6022 | E : Entity_Id; | |
6023 | Iface : Elmt_Id; | |
6024 | ||
6025 | begin | |
6026 | -- Climb to the ancestor (if any) handling private types | |
6027 | ||
6028 | if Present (Full_View (Etype (Typ))) then | |
6029 | if Full_View (Etype (Typ)) /= Typ then | |
6030 | Copy_Secondary_DTs (Full_View (Etype (Typ))); | |
6031 | end if; | |
d62940bf | 6032 | |
af647dc7 | 6033 | elsif Etype (Typ) /= Typ then |
6034 | Copy_Secondary_DTs (Etype (Typ)); | |
6035 | end if; | |
d62940bf | 6036 | |
a652dd51 | 6037 | if Present (Interfaces (Typ)) |
6038 | and then not Is_Empty_Elmt_List (Interfaces (Typ)) | |
af647dc7 | 6039 | then |
a652dd51 | 6040 | Iface := First_Elmt (Interfaces (Typ)); |
af647dc7 | 6041 | E := First_Entity (Typ); |
6042 | while Present (E) | |
6043 | and then Present (Node (Sec_DT_Ancestor)) | |
725a69d2 | 6044 | and then Ekind (Node (Sec_DT_Ancestor)) = E_Constant |
af647dc7 | 6045 | loop |
6046 | if Is_Tag (E) and then Chars (E) /= Name_uTag then | |
cdb1c38f | 6047 | declare |
6048 | Num_Prims : constant Int := | |
6049 | UI_To_Int (DT_Entry_Count (E)); | |
6050 | ||
6051 | begin | |
6052 | if not Is_Interface (Etype (Typ)) then | |
6053 | ||
6054 | -- Inherit first secondary dispatch table | |
6055 | ||
6056 | Append_To (Elab_Code, | |
6057 | Build_Inherit_Predefined_Prims (Loc, | |
6058 | Old_Tag_Node => | |
6059 | Unchecked_Convert_To (RTE (RE_Tag), | |
acf97c11 | 6060 | New_Reference_To |
6061 | (Node | |
6062 | (Next_Elmt (Sec_DT_Ancestor)), | |
6063 | Loc)), | |
cdb1c38f | 6064 | New_Tag_Node => |
6065 | Unchecked_Convert_To (RTE (RE_Tag), | |
6066 | New_Reference_To | |
acf97c11 | 6067 | (Node (Next_Elmt (Sec_DT_Typ)), |
6068 | Loc)))); | |
cdb1c38f | 6069 | |
6070 | if Num_Prims /= 0 then | |
6071 | Append_To (Elab_Code, | |
6072 | Build_Inherit_Prims (Loc, | |
6073 | Typ => Node (Iface), | |
6074 | Old_Tag_Node => | |
6075 | Unchecked_Convert_To | |
6076 | (RTE (RE_Tag), | |
6077 | New_Reference_To | |
6078 | (Node (Sec_DT_Ancestor), | |
6079 | Loc)), | |
6080 | New_Tag_Node => | |
6081 | Unchecked_Convert_To | |
6082 | (RTE (RE_Tag), | |
6083 | New_Reference_To | |
6084 | (Node (Sec_DT_Typ), Loc)), | |
6085 | Num_Prims => Num_Prims)); | |
6086 | end if; | |
6087 | end if; | |
6088 | ||
6089 | Next_Elmt (Sec_DT_Ancestor); | |
6090 | Next_Elmt (Sec_DT_Typ); | |
343d35dc | 6091 | |
acf97c11 | 6092 | -- Skip the secondary dispatch table of |
6093 | -- predefined primitives | |
6094 | ||
6095 | Next_Elmt (Sec_DT_Ancestor); | |
6096 | Next_Elmt (Sec_DT_Typ); | |
6097 | ||
cdb1c38f | 6098 | if not Is_Interface (Etype (Typ)) then |
6099 | ||
6100 | -- Inherit second secondary dispatch table | |
343d35dc | 6101 | |
343d35dc | 6102 | Append_To (Elab_Code, |
6103 | Build_Inherit_Predefined_Prims (Loc, | |
6104 | Old_Tag_Node => | |
6105 | Unchecked_Convert_To (RTE (RE_Tag), | |
6106 | New_Reference_To | |
acf97c11 | 6107 | (Node |
6108 | (Next_Elmt (Sec_DT_Ancestor)), | |
6109 | Loc)), | |
343d35dc | 6110 | New_Tag_Node => |
6111 | Unchecked_Convert_To (RTE (RE_Tag), | |
6112 | New_Reference_To | |
acf97c11 | 6113 | (Node (Next_Elmt (Sec_DT_Typ)), |
6114 | Loc)))); | |
343d35dc | 6115 | |
6116 | if Num_Prims /= 0 then | |
6117 | Append_To (Elab_Code, | |
6118 | Build_Inherit_Prims (Loc, | |
17e14451 | 6119 | Typ => Node (Iface), |
343d35dc | 6120 | Old_Tag_Node => |
6121 | Unchecked_Convert_To | |
6122 | (RTE (RE_Tag), | |
6123 | New_Reference_To | |
6124 | (Node (Sec_DT_Ancestor), | |
6125 | Loc)), | |
6126 | New_Tag_Node => | |
6127 | Unchecked_Convert_To | |
6128 | (RTE (RE_Tag), | |
6129 | New_Reference_To | |
6130 | (Node (Sec_DT_Typ), Loc)), | |
17e14451 | 6131 | Num_Prims => Num_Prims)); |
343d35dc | 6132 | end if; |
cdb1c38f | 6133 | end if; |
6134 | end; | |
af647dc7 | 6135 | |
6136 | Next_Elmt (Sec_DT_Ancestor); | |
6137 | Next_Elmt (Sec_DT_Typ); | |
acf97c11 | 6138 | |
6139 | -- Skip the secondary dispatch table of | |
6140 | -- predefined primitives | |
6141 | ||
6142 | Next_Elmt (Sec_DT_Ancestor); | |
6143 | Next_Elmt (Sec_DT_Typ); | |
6144 | ||
af647dc7 | 6145 | Next_Elmt (Iface); |
6146 | end if; | |
d62940bf | 6147 | |
af647dc7 | 6148 | Next_Entity (E); |
6149 | end loop; | |
6150 | end if; | |
6151 | end Copy_Secondary_DTs; | |
d62940bf | 6152 | |
af647dc7 | 6153 | begin |
725a69d2 | 6154 | if Present (Node (Sec_DT_Ancestor)) |
6155 | and then Ekind (Node (Sec_DT_Ancestor)) = E_Constant | |
6156 | then | |
af647dc7 | 6157 | -- Handle private types |
76a1c25b | 6158 | |
af647dc7 | 6159 | if Present (Full_View (Typ)) then |
6160 | Copy_Secondary_DTs (Full_View (Typ)); | |
6161 | else | |
6162 | Copy_Secondary_DTs (Typ); | |
6163 | end if; | |
76a1c25b | 6164 | end if; |
af647dc7 | 6165 | end; |
6166 | end if; | |
76a1c25b | 6167 | end if; |
343d35dc | 6168 | end if; |
d62940bf | 6169 | |
fd68eaab | 6170 | -- If the type has a representation clause which specifies its external |
6171 | -- tag then generate code to check if the external tag of this type is | |
6172 | -- the same as the external tag of some other declaration. | |
354540f3 | 6173 | |
6174 | -- Check_TSD (TSD'Unrestricted_Access); | |
6175 | ||
4a473cb9 | 6176 | -- This check is a consequence of AI05-0113-1/06, so it officially |
6177 | -- applies to Ada 2005 (and Ada 2012). It might be argued that it is | |
6178 | -- a desirable check to add in Ada 95 mode, but we hesitate to make | |
6179 | -- this change, as it would be incompatible, and could conceivably | |
6180 | -- cause a problem in existing Aa 95 code. | |
6181 | ||
6182 | -- We check for No_Run_Time_Mode here, because we do not want to pick | |
6183 | -- up the RE_Check_TSD entity and call it in No_Run_Time mode. | |
52b9debb | 6184 | |
354540f3 | 6185 | if not No_Run_Time_Mode |
4a473cb9 | 6186 | and then Ada_Version >= Ada_2005 |
fd68eaab | 6187 | and then Has_External_Tag_Rep_Clause (Typ) |
354540f3 | 6188 | and then RTE_Available (RE_Check_TSD) |
008ad845 | 6189 | and then not Debug_Flag_QQ |
354540f3 | 6190 | then |
6191 | Append_To (Elab_Code, | |
6192 | Make_Procedure_Call_Statement (Loc, | |
6193 | Name => New_Reference_To (RTE (RE_Check_TSD), Loc), | |
6194 | Parameter_Associations => New_List ( | |
6195 | Make_Attribute_Reference (Loc, | |
6196 | Prefix => New_Reference_To (TSD, Loc), | |
6197 | Attribute_Name => Name_Unchecked_Access)))); | |
6198 | end if; | |
6199 | ||
343d35dc | 6200 | -- Generate code to register the Tag in the External_Tag hash table for |
6201 | -- the pure Ada type only. | |
d62940bf | 6202 | |
343d35dc | 6203 | -- Register_Tag (Dt_Ptr); |
d62940bf | 6204 | |
725a69d2 | 6205 | -- Skip this action in the following cases: |
6206 | -- 1) if Register_Tag is not available. | |
6207 | -- 2) in No_Run_Time mode. | |
2ea346ac | 6208 | -- 3) if Typ is not defined at the library level (this is required |
725a69d2 | 6209 | -- to avoid adding concurrency control to the hash table used |
6210 | -- by the run-time to register the tags). | |
d62940bf | 6211 | |
cdb1c38f | 6212 | if not No_Run_Time_Mode |
6213 | and then Is_Library_Level_Entity (Typ) | |
6214 | and then RTE_Available (RE_Register_Tag) | |
6215 | then | |
725a69d2 | 6216 | Append_To (Elab_Code, |
cdb1c38f | 6217 | Make_Procedure_Call_Statement (Loc, |
6218 | Name => New_Reference_To (RTE (RE_Register_Tag), Loc), | |
6219 | Parameter_Associations => | |
6220 | New_List (New_Reference_To (DT_Ptr, Loc)))); | |
d62940bf | 6221 | end if; |
6222 | ||
2ea346ac | 6223 | if not Is_Empty_List (Elab_Code) then |
6224 | Append_List_To (Result, Elab_Code); | |
6225 | end if; | |
cdb1c38f | 6226 | |
f38c8084 | 6227 | -- Populate the two auxiliary tables used for dispatching asynchronous, |
6228 | -- conditional and timed selects for synchronized types that implement | |
6229 | -- a limited interface. Skip this step in Ravenscar profile or when | |
6230 | -- general dispatching is forbidden. | |
17e14451 | 6231 | |
de54c5ab | 6232 | if Ada_Version >= Ada_2005 |
17e14451 | 6233 | and then Is_Concurrent_Record_Type (Typ) |
a652dd51 | 6234 | and then Has_Interfaces (Typ) |
f38c8084 | 6235 | and then not Restriction_Active (No_Dispatching_Calls) |
6236 | and then not Restriction_Active (No_Select_Statements) | |
17e14451 | 6237 | then |
6238 | Append_List_To (Result, | |
6239 | Make_Select_Specific_Data_Table (Typ)); | |
6240 | end if; | |
6241 | ||
cc60bd16 | 6242 | -- Remember entities containing dispatch tables |
acf97c11 | 6243 | |
cc60bd16 | 6244 | Append_Elmt (Predef_Prims, DT_Decl); |
6245 | Append_Elmt (DT, DT_Decl); | |
acf97c11 | 6246 | |
725a69d2 | 6247 | Analyze_List (Result, Suppress => All_Checks); |
17e14451 | 6248 | Set_Has_Dispatch_Table (Typ); |
6249 | ||
f301a57b | 6250 | -- Mark entities containing dispatch tables. Required by the backend to |
6251 | -- handle them properly. | |
cc60bd16 | 6252 | |
925c2ba1 | 6253 | if Has_DT (Typ) then |
cc60bd16 | 6254 | declare |
6255 | Elmt : Elmt_Id; | |
6256 | ||
6257 | begin | |
6258 | -- Ensure that entities Prim_Ptr and Predef_Prims_Table_Ptr have | |
6259 | -- the decoration required by the backend | |
6260 | ||
6261 | Set_Is_Dispatch_Table_Entity (RTE (RE_Prim_Ptr)); | |
6262 | Set_Is_Dispatch_Table_Entity (RTE (RE_Predef_Prims_Table_Ptr)); | |
6263 | ||
6264 | -- Object declarations | |
6265 | ||
6266 | Elmt := First_Elmt (DT_Decl); | |
6267 | while Present (Elmt) loop | |
6268 | Set_Is_Dispatch_Table_Entity (Node (Elmt)); | |
6269 | pragma Assert (Ekind (Etype (Node (Elmt))) = E_Array_Subtype | |
6270 | or else Ekind (Etype (Node (Elmt))) = E_Record_Subtype); | |
6271 | Set_Is_Dispatch_Table_Entity (Etype (Node (Elmt))); | |
6272 | Next_Elmt (Elmt); | |
6273 | end loop; | |
6274 | ||
6275 | -- Aggregates initializing dispatch tables | |
6276 | ||
6277 | Elmt := First_Elmt (DT_Aggr); | |
6278 | while Present (Elmt) loop | |
6279 | Set_Is_Dispatch_Table_Entity (Etype (Node (Elmt))); | |
6280 | Next_Elmt (Elmt); | |
6281 | end loop; | |
6282 | end; | |
6283 | end if; | |
6284 | ||
e00e091c | 6285 | -- Register the tagged type in the call graph nodes table |
6286 | ||
6287 | Register_CG_Node (Typ); | |
6288 | ||
76a1c25b | 6289 | return Result; |
6290 | end Make_DT; | |
d62940bf | 6291 | |
87d6f1a4 | 6292 | ----------------- |
6293 | -- Make_VM_TSD -- | |
6294 | ----------------- | |
6295 | ||
6296 | function Make_VM_TSD (Typ : Entity_Id) return List_Id is | |
6cb4b973 | 6297 | Loc : constant Source_Ptr := Sloc (Typ); |
6298 | Result : constant List_Id := New_List; | |
6299 | ||
6300 | function Count_Primitives (Typ : Entity_Id) return Nat; | |
6301 | -- Count the non-predefined primitive operations of Typ | |
6302 | ||
6303 | ---------------------- | |
6304 | -- Count_Primitives -- | |
6305 | ---------------------- | |
6306 | ||
6307 | function Count_Primitives (Typ : Entity_Id) return Nat is | |
6308 | Nb_Prim : Nat; | |
6309 | Prim_Elmt : Elmt_Id; | |
6310 | Prim : Entity_Id; | |
6311 | ||
6312 | begin | |
6313 | Nb_Prim := 0; | |
6314 | ||
6315 | Prim_Elmt := First_Elmt (Primitive_Operations (Typ)); | |
6316 | while Present (Prim_Elmt) loop | |
6317 | Prim := Node (Prim_Elmt); | |
6318 | ||
6319 | if Is_Predefined_Dispatching_Operation (Prim) | |
6320 | or else Is_Predefined_Dispatching_Alias (Prim) | |
6321 | then | |
6322 | null; | |
6323 | ||
6324 | elsif Present (Interface_Alias (Prim)) then | |
6325 | null; | |
6326 | ||
6327 | else | |
6328 | Nb_Prim := Nb_Prim + 1; | |
6329 | end if; | |
6330 | ||
6331 | Next_Elmt (Prim_Elmt); | |
6332 | end loop; | |
6333 | ||
6334 | return Nb_Prim; | |
6335 | end Count_Primitives; | |
6336 | ||
6337 | -------------- | |
6338 | -- Make_OSD -- | |
6339 | -------------- | |
6340 | ||
6341 | function Make_OSD (Iface : Entity_Id) return Node_Id; | |
6342 | -- Generate the Object Specific Data table required to dispatch calls | |
6343 | -- through synchronized interfaces. Returns a node that references the | |
6344 | -- generated OSD object. | |
6345 | ||
6346 | function Make_OSD (Iface : Entity_Id) return Node_Id is | |
6347 | Nb_Prim : constant Nat := Count_Primitives (Iface); | |
6348 | OSD : Entity_Id; | |
6349 | OSD_Aggr_List : List_Id; | |
6350 | ||
6351 | begin | |
6352 | -- Generate | |
6353 | -- OSD : Ada.Tags.Object_Specific_Data (Nb_Prims) := | |
6354 | -- (OSD_Table => (1 => <value>, | |
6355 | -- ... | |
6356 | -- N => <value>)); | |
6357 | ||
6358 | if Nb_Prim = 0 | |
6359 | or else Is_Abstract_Type (Typ) | |
6360 | or else Is_Controlled (Typ) | |
6361 | or else Restriction_Active (No_Dispatching_Calls) | |
6362 | or else not Is_Limited_Type (Typ) | |
6363 | or else not Has_Interfaces (Typ) | |
6364 | or else not RTE_Record_Component_Available (RE_OSD_Table) | |
6365 | then | |
6366 | -- No OSD table required | |
6367 | ||
6368 | return Make_Null (Loc); | |
6369 | ||
6370 | else | |
6371 | OSD_Aggr_List := New_List; | |
6372 | ||
6373 | declare | |
6374 | Prim_Table : array (Nat range 1 .. Nb_Prim) of Entity_Id; | |
6375 | Prim : Entity_Id; | |
6376 | Prim_Alias : Entity_Id; | |
6377 | Prim_Elmt : Elmt_Id; | |
6378 | E : Entity_Id; | |
6379 | Count : Nat := 0; | |
6380 | Pos : Nat; | |
6381 | ||
6382 | begin | |
6383 | Prim_Table := (others => Empty); | |
6384 | Prim_Alias := Empty; | |
6385 | ||
6386 | Prim_Elmt := First_Elmt (Primitive_Operations (Typ)); | |
6387 | while Present (Prim_Elmt) loop | |
6388 | Prim := Node (Prim_Elmt); | |
6389 | ||
6390 | if Present (Interface_Alias (Prim)) | |
6391 | and then Find_Dispatching_Type | |
6392 | (Interface_Alias (Prim)) = Iface | |
6393 | then | |
6394 | Prim_Alias := Interface_Alias (Prim); | |
6395 | E := Ultimate_Alias (Prim); | |
6396 | Pos := UI_To_Int (DT_Position (Prim_Alias)); | |
6397 | ||
6398 | if Present (Prim_Table (Pos)) then | |
6399 | pragma Assert (Prim_Table (Pos) = E); | |
6400 | null; | |
6401 | ||
6402 | else | |
6403 | Prim_Table (Pos) := E; | |
6404 | ||
6405 | Append_To (OSD_Aggr_List, | |
6406 | Make_Component_Association (Loc, | |
6407 | Choices => New_List ( | |
6408 | Make_Integer_Literal (Loc, | |
6409 | DT_Position (Prim_Alias))), | |
6410 | Expression => | |
6411 | Make_Integer_Literal (Loc, | |
6412 | DT_Position (Alias (Prim))))); | |
6413 | ||
6414 | Count := Count + 1; | |
6415 | end if; | |
6416 | end if; | |
6417 | ||
6418 | Next_Elmt (Prim_Elmt); | |
6419 | end loop; | |
6420 | pragma Assert (Count = Nb_Prim); | |
6421 | end; | |
6422 | ||
6423 | OSD := Make_Temporary (Loc, 'I'); | |
6424 | ||
6425 | Append_To (Result, | |
6426 | Make_Object_Declaration (Loc, | |
6427 | Defining_Identifier => OSD, | |
6428 | Aliased_Present => True, | |
6429 | Constant_Present => True, | |
6430 | Object_Definition => | |
6431 | Make_Subtype_Indication (Loc, | |
6432 | Subtype_Mark => | |
6433 | New_Reference_To (RTE (RE_Object_Specific_Data), Loc), | |
6434 | Constraint => | |
6435 | Make_Index_Or_Discriminant_Constraint (Loc, | |
6436 | Constraints => New_List ( | |
6437 | Make_Integer_Literal (Loc, Nb_Prim)))), | |
6438 | ||
6439 | Expression => | |
6440 | Make_Aggregate (Loc, | |
6441 | Component_Associations => New_List ( | |
6442 | Make_Component_Association (Loc, | |
6443 | Choices => New_List ( | |
6444 | New_Occurrence_Of | |
6445 | (RTE_Record_Component (RE_OSD_Num_Prims), Loc)), | |
6446 | Expression => | |
6447 | Make_Integer_Literal (Loc, Nb_Prim)), | |
6448 | ||
6449 | Make_Component_Association (Loc, | |
6450 | Choices => New_List ( | |
6451 | New_Occurrence_Of | |
6452 | (RTE_Record_Component (RE_OSD_Table), Loc)), | |
6453 | Expression => Make_Aggregate (Loc, | |
6454 | Component_Associations => OSD_Aggr_List)))))); | |
6455 | ||
6456 | return | |
6457 | Make_Attribute_Reference (Loc, | |
6458 | Prefix => New_Reference_To (OSD, Loc), | |
6459 | Attribute_Name => Name_Unchecked_Access); | |
6460 | end if; | |
6461 | end Make_OSD; | |
6462 | ||
6463 | -- Local variables | |
6464 | ||
6465 | Nb_Prim : constant Nat := Count_Primitives (Typ); | |
87d6f1a4 | 6466 | AI : Elmt_Id; |
bf7f5966 | 6467 | I_Depth : Nat; |
87d6f1a4 | 6468 | Iface_Table_Node : Node_Id; |
bf7f5966 | 6469 | Num_Ifaces : Nat; |
87d6f1a4 | 6470 | TSD_Aggr_List : List_Id; |
6471 | Typ_Ifaces : Elist_Id; | |
6472 | TSD_Tags_List : List_Id; | |
6473 | ||
6474 | Tname : constant Name_Id := Chars (Typ); | |
bf7f5966 | 6475 | Name_SSD : constant Name_Id := |
6476 | New_External_Name (Tname, 'S', Suffix_Index => -1); | |
87d6f1a4 | 6477 | Name_TSD : constant Name_Id := |
6478 | New_External_Name (Tname, 'B', Suffix_Index => -1); | |
bf7f5966 | 6479 | SSD : constant Entity_Id := |
6480 | Make_Defining_Identifier (Loc, Name_SSD); | |
87d6f1a4 | 6481 | TSD : constant Entity_Id := |
6482 | Make_Defining_Identifier (Loc, Name_TSD); | |
6483 | begin | |
6484 | -- Generate code to create the storage for the type specific data object | |
6485 | -- with enough space to store the tags of the ancestors plus the tags | |
6486 | -- of all the implemented interfaces (as described in a-tags.ads). | |
6487 | ||
6488 | -- TSD : Type_Specific_Data (I_Depth) := | |
6489 | -- (Idepth => I_Depth, | |
6cb4b973 | 6490 | -- Tag_Kind => <tag_kind-value>, |
87d6f1a4 | 6491 | -- Access_Level => Type_Access_Level (Typ), |
d67a83fe | 6492 | -- Alignment => Typ'Alignment, |
87d6f1a4 | 6493 | -- HT_Link => null, |
6494 | -- Type_Is_Abstract => <<boolean-value>>, | |
6495 | -- Type_Is_Library_Level => <<boolean-value>>, | |
6496 | -- Interfaces_Table => <<access-value>> | |
6cb4b973 | 6497 | -- SSD => SSD_Table'Address |
87d6f1a4 | 6498 | -- Tags_Table => (0 => Typ'Tag, |
6499 | -- 1 => Parent'Tag | |
6500 | -- ...)); | |
6501 | ||
6502 | TSD_Aggr_List := New_List; | |
6503 | ||
6504 | -- Idepth: Count ancestors to compute the inheritance depth. For private | |
6505 | -- extensions, always go to the full view in order to compute the real | |
6506 | -- inheritance depth. | |
6507 | ||
6508 | declare | |
6509 | Current_Typ : Entity_Id; | |
6510 | Parent_Typ : Entity_Id; | |
6511 | ||
6512 | begin | |
6513 | I_Depth := 0; | |
6514 | Current_Typ := Typ; | |
6515 | loop | |
6516 | Parent_Typ := Etype (Current_Typ); | |
6517 | ||
6518 | if Is_Private_Type (Parent_Typ) then | |
6519 | Parent_Typ := Full_View (Base_Type (Parent_Typ)); | |
6520 | end if; | |
6521 | ||
6522 | exit when Parent_Typ = Current_Typ; | |
6523 | ||
6524 | I_Depth := I_Depth + 1; | |
6525 | Current_Typ := Parent_Typ; | |
6526 | end loop; | |
6527 | end; | |
6528 | ||
6cb4b973 | 6529 | -- I_Depth |
6530 | ||
87d6f1a4 | 6531 | Append_To (TSD_Aggr_List, |
6532 | Make_Integer_Literal (Loc, I_Depth)); | |
6533 | ||
6cb4b973 | 6534 | -- Tag_Kind |
6535 | ||
6536 | Append_To (TSD_Aggr_List, Tagged_Kind (Typ)); | |
6537 | ||
87d6f1a4 | 6538 | -- Access_Level |
6539 | ||
6540 | Append_To (TSD_Aggr_List, | |
6541 | Make_Integer_Literal (Loc, Type_Access_Level (Typ))); | |
6542 | ||
d67a83fe | 6543 | -- Alignment |
6544 | ||
6fc3e7ad | 6545 | -- For CPP types we cannot rely on the value of 'Alignment provided |
44705307 | 6546 | -- by the backend to initialize this TSD field. Why not??? |
6fc3e7ad | 6547 | |
6548 | if Convention (Typ) = Convention_CPP | |
6549 | or else Is_CPP_Class (Root_Type (Typ)) | |
6550 | then | |
6551 | Append_To (TSD_Aggr_List, | |
6552 | Make_Integer_Literal (Loc, 0)); | |
6553 | else | |
6554 | Append_To (TSD_Aggr_List, | |
6555 | Make_Attribute_Reference (Loc, | |
6556 | Prefix => New_Reference_To (Typ, Loc), | |
6557 | Attribute_Name => Name_Alignment)); | |
6558 | end if; | |
d67a83fe | 6559 | |
87d6f1a4 | 6560 | -- HT_Link |
6561 | ||
6562 | Append_To (TSD_Aggr_List, | |
6563 | Make_Null (Loc)); | |
6564 | ||
6565 | -- Type_Is_Abstract (Ada 2012: AI05-0173) | |
6566 | ||
6567 | declare | |
6568 | Type_Is_Abstract : Entity_Id; | |
6569 | ||
6570 | begin | |
6571 | Type_Is_Abstract := | |
6572 | Boolean_Literals (Is_Abstract_Type (Typ)); | |
6573 | ||
6574 | Append_To (TSD_Aggr_List, | |
6575 | New_Occurrence_Of (Type_Is_Abstract, Loc)); | |
6576 | end; | |
6577 | ||
6578 | -- Type_Is_Library_Level | |
6579 | ||
6580 | declare | |
6581 | Type_Is_Library_Level : Entity_Id; | |
87d6f1a4 | 6582 | begin |
6583 | Type_Is_Library_Level := | |
6584 | Boolean_Literals (Is_Library_Level_Entity (Typ)); | |
87d6f1a4 | 6585 | Append_To (TSD_Aggr_List, |
6586 | New_Occurrence_Of (Type_Is_Library_Level, Loc)); | |
6587 | end; | |
6588 | ||
6589 | -- Interfaces_Table (required for AI-405) | |
6590 | ||
6591 | if RTE_Record_Component_Available (RE_Interfaces_Table) then | |
6592 | ||
6593 | -- Count the number of interface types implemented by Typ | |
6594 | ||
6595 | Collect_Interfaces (Typ, Typ_Ifaces); | |
6596 | ||
bf7f5966 | 6597 | Num_Ifaces := 0; |
87d6f1a4 | 6598 | AI := First_Elmt (Typ_Ifaces); |
6599 | while Present (AI) loop | |
6600 | Num_Ifaces := Num_Ifaces + 1; | |
6601 | Next_Elmt (AI); | |
6602 | end loop; | |
6603 | ||
6604 | if Num_Ifaces = 0 then | |
6605 | Iface_Table_Node := Make_Null (Loc); | |
6606 | ||
6607 | -- Generate the Interface_Table object | |
6608 | ||
6609 | else | |
6610 | declare | |
6611 | TSD_Ifaces_List : constant List_Id := New_List; | |
6cb4b973 | 6612 | Iface : Entity_Id; |
87d6f1a4 | 6613 | ITable : Node_Id; |
6614 | ||
6615 | begin | |
6616 | AI := First_Elmt (Typ_Ifaces); | |
6617 | while Present (AI) loop | |
6cb4b973 | 6618 | Iface := Node (AI); |
6619 | ||
87d6f1a4 | 6620 | Append_To (TSD_Ifaces_List, |
6621 | Make_Aggregate (Loc, | |
6622 | Expressions => New_List ( | |
6cb4b973 | 6623 | |
4055a532 | 6624 | -- Iface_Tag |
6cb4b973 | 6625 | |
87d6f1a4 | 6626 | Make_Attribute_Reference (Loc, |
b860aaec | 6627 | Prefix => New_Reference_To (Iface, Loc), |
6cb4b973 | 6628 | Attribute_Name => Name_Tag), |
6629 | ||
4055a532 | 6630 | -- OSD |
6cb4b973 | 6631 | |
6632 | Make_OSD (Iface)))); | |
87d6f1a4 | 6633 | |
6634 | Next_Elmt (AI); | |
6635 | end loop; | |
6636 | ||
6637 | ITable := Make_Temporary (Loc, 'I'); | |
6638 | ||
6639 | Append_To (Result, | |
6640 | Make_Object_Declaration (Loc, | |
6641 | Defining_Identifier => ITable, | |
6642 | Aliased_Present => True, | |
6643 | Constant_Present => True, | |
6644 | Object_Definition => | |
6645 | Make_Subtype_Indication (Loc, | |
6646 | Subtype_Mark => | |
6647 | New_Reference_To (RTE (RE_Interface_Data), Loc), | |
b860aaec | 6648 | Constraint => Make_Index_Or_Discriminant_Constraint |
87d6f1a4 | 6649 | (Loc, |
6650 | Constraints => New_List ( | |
6651 | Make_Integer_Literal (Loc, Num_Ifaces)))), | |
6652 | ||
6653 | Expression => Make_Aggregate (Loc, | |
6654 | Expressions => New_List ( | |
6655 | Make_Integer_Literal (Loc, Num_Ifaces), | |
6656 | Make_Aggregate (Loc, | |
6657 | Expressions => TSD_Ifaces_List))))); | |
6658 | ||
6659 | Iface_Table_Node := | |
6660 | Make_Attribute_Reference (Loc, | |
6661 | Prefix => New_Reference_To (ITable, Loc), | |
6662 | Attribute_Name => Name_Unchecked_Access); | |
6663 | end; | |
6664 | end if; | |
6665 | ||
6666 | Append_To (TSD_Aggr_List, Iface_Table_Node); | |
6667 | end if; | |
6668 | ||
bf7f5966 | 6669 | -- Generate the Select Specific Data table for synchronized types that |
6670 | -- implement synchronized interfaces. The size of the table is | |
6671 | -- constrained by the number of non-predefined primitive operations. | |
6672 | ||
bf7f5966 | 6673 | if RTE_Record_Component_Available (RE_SSD) then |
6674 | if Ada_Version >= Ada_2005 | |
6675 | and then Has_DT (Typ) | |
6676 | and then Is_Concurrent_Record_Type (Typ) | |
6677 | and then Has_Interfaces (Typ) | |
6678 | and then Nb_Prim > 0 | |
6679 | and then not Is_Abstract_Type (Typ) | |
6680 | and then not Is_Controlled (Typ) | |
6681 | and then not Restriction_Active (No_Dispatching_Calls) | |
6682 | and then not Restriction_Active (No_Select_Statements) | |
6683 | then | |
6684 | Append_To (Result, | |
6685 | Make_Object_Declaration (Loc, | |
6686 | Defining_Identifier => SSD, | |
6687 | Aliased_Present => True, | |
6688 | Object_Definition => | |
6689 | Make_Subtype_Indication (Loc, | |
6690 | Subtype_Mark => New_Reference_To ( | |
6691 | RTE (RE_Select_Specific_Data), Loc), | |
6692 | Constraint => | |
6693 | Make_Index_Or_Discriminant_Constraint (Loc, | |
6694 | Constraints => New_List ( | |
6695 | Make_Integer_Literal (Loc, Nb_Prim)))))); | |
6696 | ||
6697 | -- This table is initialized by Make_Select_Specific_Data_Table, | |
6698 | -- which calls Set_Entry_Index and Set_Prim_Op_Kind. | |
6699 | ||
6700 | Append_To (TSD_Aggr_List, | |
6701 | Make_Attribute_Reference (Loc, | |
4055a532 | 6702 | Prefix => New_Reference_To (SSD, Loc), |
bf7f5966 | 6703 | Attribute_Name => Name_Unchecked_Access)); |
6704 | else | |
6705 | Append_To (TSD_Aggr_List, Make_Null (Loc)); | |
6706 | end if; | |
6707 | end if; | |
6708 | ||
87d6f1a4 | 6709 | -- Initialize the table of ancestor tags. In case of interface types |
6710 | -- this table is not needed. | |
6711 | ||
6712 | TSD_Tags_List := New_List; | |
6713 | ||
6714 | -- Fill position 0 with Typ'Tag | |
6715 | ||
6716 | Append_To (TSD_Tags_List, | |
6717 | Make_Attribute_Reference (Loc, | |
4055a532 | 6718 | Prefix => New_Reference_To (Typ, Loc), |
87d6f1a4 | 6719 | Attribute_Name => Name_Tag)); |
6720 | ||
6721 | -- Fill the rest of the table with the tags of the ancestors | |
6722 | ||
6723 | declare | |
6724 | Current_Typ : Entity_Id; | |
6725 | Parent_Typ : Entity_Id; | |
6726 | Pos : Nat; | |
6727 | ||
6728 | begin | |
6729 | Pos := 1; | |
6730 | Current_Typ := Typ; | |
6731 | ||
6732 | loop | |
6733 | Parent_Typ := Etype (Current_Typ); | |
6734 | ||
6735 | if Is_Private_Type (Parent_Typ) then | |
6736 | Parent_Typ := Full_View (Base_Type (Parent_Typ)); | |
6737 | end if; | |
6738 | ||
6739 | exit when Parent_Typ = Current_Typ; | |
6740 | ||
6741 | Append_To (TSD_Tags_List, | |
6742 | Make_Attribute_Reference (Loc, | |
4055a532 | 6743 | Prefix => New_Reference_To (Parent_Typ, Loc), |
87d6f1a4 | 6744 | Attribute_Name => Name_Tag)); |
6745 | ||
6746 | Pos := Pos + 1; | |
6747 | Current_Typ := Parent_Typ; | |
6748 | end loop; | |
6749 | ||
6750 | pragma Assert (Pos = I_Depth + 1); | |
6751 | end; | |
6752 | ||
6753 | Append_To (TSD_Aggr_List, | |
6754 | Make_Aggregate (Loc, | |
6755 | Expressions => TSD_Tags_List)); | |
6756 | ||
6757 | -- Build the TSD object | |
6758 | ||
6759 | Append_To (Result, | |
6760 | Make_Object_Declaration (Loc, | |
6761 | Defining_Identifier => TSD, | |
6762 | Aliased_Present => True, | |
6763 | Constant_Present => True, | |
6764 | Object_Definition => | |
6765 | Make_Subtype_Indication (Loc, | |
6766 | Subtype_Mark => New_Reference_To ( | |
6767 | RTE (RE_Type_Specific_Data), Loc), | |
6768 | Constraint => | |
6769 | Make_Index_Or_Discriminant_Constraint (Loc, | |
6770 | Constraints => New_List ( | |
6771 | Make_Integer_Literal (Loc, I_Depth)))), | |
6772 | ||
6773 | Expression => Make_Aggregate (Loc, | |
6774 | Expressions => TSD_Aggr_List))); | |
6775 | ||
6776 | -- Generate: | |
6777 | -- Check_TSD | |
6778 | -- (TSD => TSD'Unrestricted_Access); | |
6779 | ||
79500ea0 | 6780 | if Ada_Version >= Ada_2005 |
6781 | and then Is_Library_Level_Entity (Typ) | |
6782 | and then Has_External_Tag_Rep_Clause (Typ) | |
6783 | and then RTE_Available (RE_Check_TSD) | |
6784 | and then not Debug_Flag_QQ | |
6785 | then | |
6786 | Append_To (Result, | |
6787 | Make_Procedure_Call_Statement (Loc, | |
6788 | Name => New_Reference_To (RTE (RE_Check_TSD), Loc), | |
6789 | Parameter_Associations => New_List ( | |
6790 | Make_Attribute_Reference (Loc, | |
f53dda32 | 6791 | Prefix => New_Reference_To (TSD, Loc), |
79500ea0 | 6792 | Attribute_Name => Name_Unrestricted_Access)))); |
6793 | end if; | |
87d6f1a4 | 6794 | |
6795 | -- Generate: | |
6796 | -- Register_TSD (TSD'Unrestricted_Access); | |
6797 | ||
6798 | Append_To (Result, | |
6799 | Make_Procedure_Call_Statement (Loc, | |
6800 | Name => New_Reference_To (RTE (RE_Register_TSD), Loc), | |
6801 | Parameter_Associations => New_List ( | |
6802 | Make_Attribute_Reference (Loc, | |
f53dda32 | 6803 | Prefix => New_Reference_To (TSD, Loc), |
87d6f1a4 | 6804 | Attribute_Name => Name_Unrestricted_Access)))); |
6805 | ||
bf7f5966 | 6806 | -- Populate the two auxiliary tables used for dispatching asynchronous, |
6807 | -- conditional and timed selects for synchronized types that implement | |
6808 | -- a limited interface. Skip this step in Ravenscar profile or when | |
6809 | -- general dispatching is forbidden. | |
6810 | ||
6811 | if Ada_Version >= Ada_2005 | |
6812 | and then Is_Concurrent_Record_Type (Typ) | |
6813 | and then Has_Interfaces (Typ) | |
6814 | and then not Restriction_Active (No_Dispatching_Calls) | |
6815 | and then not Restriction_Active (No_Select_Statements) | |
6816 | then | |
6817 | Append_List_To (Result, | |
6818 | Make_Select_Specific_Data_Table (Typ)); | |
6819 | end if; | |
6820 | ||
87d6f1a4 | 6821 | return Result; |
6822 | end Make_VM_TSD; | |
6823 | ||
76a1c25b | 6824 | ------------------------------------- |
6825 | -- Make_Select_Specific_Data_Table -- | |
6826 | ------------------------------------- | |
d62940bf | 6827 | |
76a1c25b | 6828 | function Make_Select_Specific_Data_Table |
6829 | (Typ : Entity_Id) return List_Id | |
6830 | is | |
6831 | Assignments : constant List_Id := New_List; | |
6832 | Loc : constant Source_Ptr := Sloc (Typ); | |
d62940bf | 6833 | |
68f95949 | 6834 | Conc_Typ : Entity_Id; |
6835 | Decls : List_Id; | |
68f95949 | 6836 | Prim : Entity_Id; |
6837 | Prim_Als : Entity_Id; | |
6838 | Prim_Elmt : Elmt_Id; | |
6839 | Prim_Pos : Uint; | |
343d35dc | 6840 | Nb_Prim : Nat := 0; |
d62940bf | 6841 | |
76a1c25b | 6842 | type Examined_Array is array (Int range <>) of Boolean; |
d62940bf | 6843 | |
76a1c25b | 6844 | function Find_Entry_Index (E : Entity_Id) return Uint; |
6845 | -- Given an entry, find its index in the visible declarations of the | |
6846 | -- corresponding concurrent type of Typ. | |
d62940bf | 6847 | |
76a1c25b | 6848 | ---------------------- |
6849 | -- Find_Entry_Index -- | |
6850 | ---------------------- | |
d62940bf | 6851 | |
76a1c25b | 6852 | function Find_Entry_Index (E : Entity_Id) return Uint is |
6853 | Index : Uint := Uint_1; | |
6854 | Subp_Decl : Entity_Id; | |
d62940bf | 6855 | |
76a1c25b | 6856 | begin |
6857 | if Present (Decls) | |
6858 | and then not Is_Empty_List (Decls) | |
6859 | then | |
6860 | Subp_Decl := First (Decls); | |
6861 | while Present (Subp_Decl) loop | |
6862 | if Nkind (Subp_Decl) = N_Entry_Declaration then | |
6863 | if Defining_Identifier (Subp_Decl) = E then | |
6864 | return Index; | |
6865 | end if; | |
d62940bf | 6866 | |
76a1c25b | 6867 | Index := Index + 1; |
6868 | end if; | |
d62940bf | 6869 | |
76a1c25b | 6870 | Next (Subp_Decl); |
6871 | end loop; | |
6872 | end if; | |
d62940bf | 6873 | |
76a1c25b | 6874 | return Uint_0; |
6875 | end Find_Entry_Index; | |
6876 | ||
bf7f5966 | 6877 | -- Local variables |
6878 | ||
6879 | Tag_Node : Node_Id; | |
6880 | ||
76a1c25b | 6881 | -- Start of processing for Make_Select_Specific_Data_Table |
6882 | ||
6883 | begin | |
68f95949 | 6884 | pragma Assert (not Restriction_Active (No_Dispatching_Calls)); |
6885 | ||
76a1c25b | 6886 | if Present (Corresponding_Concurrent_Type (Typ)) then |
6887 | Conc_Typ := Corresponding_Concurrent_Type (Typ); | |
6888 | ||
17e14451 | 6889 | if Present (Full_View (Conc_Typ)) then |
6890 | Conc_Typ := Full_View (Conc_Typ); | |
6891 | end if; | |
6892 | ||
76a1c25b | 6893 | if Ekind (Conc_Typ) = E_Protected_Type then |
6894 | Decls := Visible_Declarations (Protected_Definition ( | |
6895 | Parent (Conc_Typ))); | |
d62940bf | 6896 | else |
6897 | pragma Assert (Ekind (Conc_Typ) = E_Task_Type); | |
76a1c25b | 6898 | Decls := Visible_Declarations (Task_Definition ( |
6899 | Parent (Conc_Typ))); | |
6900 | end if; | |
6901 | end if; | |
d62940bf | 6902 | |
76a1c25b | 6903 | -- Count the non-predefined primitive operations |
d62940bf | 6904 | |
76a1c25b | 6905 | Prim_Elmt := First_Elmt (Primitive_Operations (Typ)); |
6906 | while Present (Prim_Elmt) loop | |
af647dc7 | 6907 | Prim := Node (Prim_Elmt); |
6908 | ||
6909 | if not (Is_Predefined_Dispatching_Operation (Prim) | |
6910 | or else Is_Predefined_Dispatching_Alias (Prim)) | |
6911 | then | |
76a1c25b | 6912 | Nb_Prim := Nb_Prim + 1; |
6913 | end if; | |
d62940bf | 6914 | |
76a1c25b | 6915 | Next_Elmt (Prim_Elmt); |
6916 | end loop; | |
d62940bf | 6917 | |
76a1c25b | 6918 | declare |
68f95949 | 6919 | Examined : Examined_Array (1 .. Nb_Prim) := (others => False); |
d62940bf | 6920 | |
76a1c25b | 6921 | begin |
6922 | Prim_Elmt := First_Elmt (Primitive_Operations (Typ)); | |
6923 | while Present (Prim_Elmt) loop | |
6924 | Prim := Node (Prim_Elmt); | |
d62940bf | 6925 | |
af647dc7 | 6926 | -- Look for primitive overriding an abstract interface subprogram |
d62940bf | 6927 | |
a652dd51 | 6928 | if Present (Interface_Alias (Prim)) |
c8da6114 | 6929 | and then not |
6930 | Is_Ancestor | |
cb4af01d | 6931 | (Find_Dispatching_Type (Interface_Alias (Prim)), Typ, |
6932 | Use_Full_View => True) | |
af647dc7 | 6933 | and then not Examined (UI_To_Int (DT_Position (Alias (Prim)))) |
6934 | then | |
6935 | Prim_Pos := DT_Position (Alias (Prim)); | |
6936 | pragma Assert (UI_To_Int (Prim_Pos) <= Nb_Prim); | |
6937 | Examined (UI_To_Int (Prim_Pos)) := True; | |
d62940bf | 6938 | |
af647dc7 | 6939 | -- Set the primitive operation kind regardless of subprogram |
6940 | -- type. Generate: | |
6941 | -- Ada.Tags.Set_Prim_Op_Kind (DT_Ptr, <position>, <kind>); | |
d62940bf | 6942 | |
bf7f5966 | 6943 | if Tagged_Type_Expansion then |
6944 | Tag_Node := | |
6945 | New_Reference_To | |
6946 | (Node (First_Elmt (Access_Disp_Table (Typ))), Loc); | |
6947 | ||
6948 | else | |
6949 | Tag_Node := | |
6950 | Make_Attribute_Reference (Loc, | |
4055a532 | 6951 | Prefix => New_Reference_To (Typ, Loc), |
bf7f5966 | 6952 | Attribute_Name => Name_Tag); |
6953 | end if; | |
6954 | ||
af647dc7 | 6955 | Append_To (Assignments, |
725a69d2 | 6956 | Make_Procedure_Call_Statement (Loc, |
6957 | Name => New_Reference_To (RTE (RE_Set_Prim_Op_Kind), Loc), | |
6958 | Parameter_Associations => New_List ( | |
bf7f5966 | 6959 | Tag_Node, |
725a69d2 | 6960 | Make_Integer_Literal (Loc, Prim_Pos), |
6961 | Prim_Op_Kind (Alias (Prim), Typ)))); | |
68f95949 | 6962 | |
af647dc7 | 6963 | -- Retrieve the root of the alias chain |
68f95949 | 6964 | |
fc2907f6 | 6965 | Prim_Als := Ultimate_Alias (Prim); |
68f95949 | 6966 | |
af647dc7 | 6967 | -- In the case of an entry wrapper, set the entry index |
68f95949 | 6968 | |
af647dc7 | 6969 | if Ekind (Prim) = E_Procedure |
6970 | and then Is_Primitive_Wrapper (Prim_Als) | |
6971 | and then Ekind (Wrapped_Entity (Prim_Als)) = E_Entry | |
6972 | then | |
6973 | -- Generate: | |
6974 | -- Ada.Tags.Set_Entry_Index | |
6975 | -- (DT_Ptr, <position>, <index>); | |
68f95949 | 6976 | |
bf7f5966 | 6977 | if Tagged_Type_Expansion then |
6978 | Tag_Node := | |
6979 | New_Reference_To | |
96dc081d | 6980 | (Node (First_Elmt (Access_Disp_Table (Typ))), Loc); |
bf7f5966 | 6981 | else |
6982 | Tag_Node := | |
6983 | Make_Attribute_Reference (Loc, | |
4055a532 | 6984 | Prefix => New_Reference_To (Typ, Loc), |
bf7f5966 | 6985 | Attribute_Name => Name_Tag); |
6986 | end if; | |
6987 | ||
af647dc7 | 6988 | Append_To (Assignments, |
725a69d2 | 6989 | Make_Procedure_Call_Statement (Loc, |
6990 | Name => | |
6991 | New_Reference_To (RTE (RE_Set_Entry_Index), Loc), | |
6992 | Parameter_Associations => New_List ( | |
bf7f5966 | 6993 | Tag_Node, |
725a69d2 | 6994 | Make_Integer_Literal (Loc, Prim_Pos), |
6995 | Make_Integer_Literal (Loc, | |
6996 | Find_Entry_Index (Wrapped_Entity (Prim_Als)))))); | |
76a1c25b | 6997 | end if; |
6998 | end if; | |
6999 | ||
76a1c25b | 7000 | Next_Elmt (Prim_Elmt); |
7001 | end loop; | |
7002 | end; | |
7003 | ||
7004 | return Assignments; | |
7005 | end Make_Select_Specific_Data_Table; | |
d62940bf | 7006 | |
17e14451 | 7007 | --------------- |
7008 | -- Make_Tags -- | |
7009 | --------------- | |
7010 | ||
7011 | function Make_Tags (Typ : Entity_Id) return List_Id is | |
f301a57b | 7012 | Loc : constant Source_Ptr := Sloc (Typ); |
7013 | Result : constant List_Id := New_List; | |
7014 | ||
7015 | procedure Import_DT | |
7016 | (Tag_Typ : Entity_Id; | |
7017 | DT : Entity_Id; | |
7018 | Is_Secondary_DT : Boolean); | |
7019 | -- Import the dispatch table DT of tagged type Tag_Typ. Required to | |
7020 | -- generate forward references and statically allocate the table. For | |
7021 | -- primary dispatch tables that require no dispatch table generate: | |
d03ada96 | 7022 | |
f301a57b | 7023 | -- DT : static aliased constant Non_Dispatch_Table_Wrapper; |
d03ada96 | 7024 | -- pragma Import (Ada, DT); |
7025 | ||
f301a57b | 7026 | -- Otherwise generate: |
d03ada96 | 7027 | |
f301a57b | 7028 | -- DT : static aliased constant Dispatch_Table_Wrapper (Nb_Prim); |
d03ada96 | 7029 | -- pragma Import (Ada, DT); |
7854e190 | 7030 | |
f301a57b | 7031 | --------------- |
7032 | -- Import_DT -- | |
7033 | --------------- | |
24971415 | 7034 | |
f301a57b | 7035 | procedure Import_DT |
7036 | (Tag_Typ : Entity_Id; | |
7037 | DT : Entity_Id; | |
7038 | Is_Secondary_DT : Boolean) | |
7039 | is | |
7040 | DT_Constr_List : List_Id; | |
7041 | Nb_Prim : Nat; | |
24971415 | 7042 | |
f301a57b | 7043 | begin |
7044 | Set_Is_Imported (DT); | |
7045 | Set_Ekind (DT, E_Constant); | |
7046 | Set_Related_Type (DT, Typ); | |
24971415 | 7047 | |
24971415 | 7048 | -- The scope must be set now to call Get_External_Name |
7049 | ||
7050 | Set_Scope (DT, Current_Scope); | |
7051 | ||
7052 | Get_External_Name (DT, True); | |
7053 | Set_Interface_Name (DT, | |
d03ada96 | 7054 | Make_String_Literal (Loc, Strval => String_From_Name_Buffer)); |
17e14451 | 7055 | |
24971415 | 7056 | -- Ensure proper Sprint output of this implicit importation |
17e14451 | 7057 | |
24971415 | 7058 | Set_Is_Internal (DT); |
17e14451 | 7059 | |
24971415 | 7060 | -- Save this entity to allow Make_DT to generate its exportation |
7061 | ||
f301a57b | 7062 | Append_Elmt (DT, Dispatch_Table_Wrappers (Typ)); |
24971415 | 7063 | |
f301a57b | 7064 | -- No dispatch table required |
acf97c11 | 7065 | |
d03ada96 | 7066 | if not Is_Secondary_DT and then not Has_DT (Tag_Typ) then |
f301a57b | 7067 | Append_To (Result, |
7068 | Make_Object_Declaration (Loc, | |
7069 | Defining_Identifier => DT, | |
7070 | Aliased_Present => True, | |
7071 | Constant_Present => True, | |
7072 | Object_Definition => | |
7073 | New_Reference_To (RTE (RE_No_Dispatch_Table_Wrapper), Loc))); | |
7074 | ||
7075 | else | |
24971415 | 7076 | -- Calculate the number of primitives of the dispatch table and |
7077 | -- the size of the Type_Specific_Data record. | |
7078 | ||
f301a57b | 7079 | Nb_Prim := |
7080 | UI_To_Int (DT_Entry_Count (First_Tag_Component (Tag_Typ))); | |
24971415 | 7081 | |
d03ada96 | 7082 | -- If the tagged type has no primitives we add a dummy slot whose |
7083 | -- address will be the tag of this type. | |
24971415 | 7084 | |
7085 | if Nb_Prim = 0 then | |
7086 | DT_Constr_List := | |
7087 | New_List (Make_Integer_Literal (Loc, 1)); | |
7088 | else | |
7089 | DT_Constr_List := | |
7090 | New_List (Make_Integer_Literal (Loc, Nb_Prim)); | |
7091 | end if; | |
7092 | ||
7093 | Append_To (Result, | |
7094 | Make_Object_Declaration (Loc, | |
7095 | Defining_Identifier => DT, | |
7096 | Aliased_Present => True, | |
7097 | Constant_Present => True, | |
7098 | Object_Definition => | |
7099 | Make_Subtype_Indication (Loc, | |
7100 | Subtype_Mark => | |
7101 | New_Reference_To (RTE (RE_Dispatch_Table_Wrapper), Loc), | |
7102 | Constraint => Make_Index_Or_Discriminant_Constraint (Loc, | |
7103 | Constraints => DT_Constr_List)))); | |
f301a57b | 7104 | end if; |
7105 | end Import_DT; | |
7106 | ||
7107 | -- Local variables | |
7108 | ||
7109 | Tname : constant Name_Id := Chars (Typ); | |
7110 | AI_Tag_Comp : Elmt_Id; | |
7640ed3d | 7111 | DT : Node_Id := Empty; |
f301a57b | 7112 | DT_Ptr : Node_Id; |
7113 | Predef_Prims_Ptr : Node_Id; | |
d04be62f | 7114 | Iface_DT : Node_Id := Empty; |
f301a57b | 7115 | Iface_DT_Ptr : Node_Id; |
d215f619 | 7116 | New_Node : Node_Id; |
f301a57b | 7117 | Suffix_Index : Int; |
7118 | Typ_Name : Name_Id; | |
7119 | Typ_Comps : Elist_Id; | |
7120 | ||
7121 | -- Start of processing for Make_Tags | |
7122 | ||
7123 | begin | |
d00681a7 | 7124 | pragma Assert (No (Access_Disp_Table (Typ))); |
7125 | Set_Access_Disp_Table (Typ, New_Elmt_List); | |
f301a57b | 7126 | |
7127 | -- 1) Generate the primary tag entities | |
7128 | ||
7129 | -- Primary dispatch table containing user-defined primitives | |
7130 | ||
d00681a7 | 7131 | DT_Ptr := Make_Defining_Identifier (Loc, New_External_Name (Tname, 'P')); |
7132 | Set_Etype (DT_Ptr, RTE (RE_Tag)); | |
7133 | Append_Elmt (DT_Ptr, Access_Disp_Table (Typ)); | |
f301a57b | 7134 | |
d00681a7 | 7135 | -- Minimum decoration |
f301a57b | 7136 | |
d00681a7 | 7137 | Set_Ekind (DT_Ptr, E_Variable); |
7138 | Set_Related_Type (DT_Ptr, Typ); | |
f301a57b | 7139 | |
d00681a7 | 7140 | -- For CPP types there is no need to build the dispatch tables since |
5682f43c | 7141 | -- they are imported from the C++ side. If the CPP type has an IP then |
7142 | -- we declare now the variable that will store the copy of the C++ tag. | |
d03ada96 | 7143 | -- If the CPP type is an interface, we need the variable as well because |
7144 | -- it becomes the pointer to the corresponding secondary table. | |
f301a57b | 7145 | |
d00681a7 | 7146 | if Is_CPP_Class (Typ) then |
5682f43c | 7147 | if Has_CPP_Constructors (Typ) or else Is_Interface (Typ) then |
24971415 | 7148 | Append_To (Result, |
7149 | Make_Object_Declaration (Loc, | |
7150 | Defining_Identifier => DT_Ptr, | |
24971415 | 7151 | Object_Definition => New_Reference_To (RTE (RE_Tag), Loc), |
7152 | Expression => | |
7153 | Unchecked_Convert_To (RTE (RE_Tag), | |
d00681a7 | 7154 | New_Reference_To (RTE (RE_Null_Address), Loc)))); |
24971415 | 7155 | |
d00681a7 | 7156 | Set_Is_Statically_Allocated (DT_Ptr, |
7157 | Is_Library_Level_Tagged_Type (Typ)); | |
7158 | end if; | |
9af28f61 | 7159 | |
d00681a7 | 7160 | -- Ada types |
3dbca0d5 | 7161 | |
d00681a7 | 7162 | else |
7163 | -- Primary dispatch table containing predefined primitives | |
acf97c11 | 7164 | |
d00681a7 | 7165 | Predef_Prims_Ptr := |
7166 | Make_Defining_Identifier (Loc, | |
7167 | Chars => New_External_Name (Tname, 'Y')); | |
7168 | Set_Etype (Predef_Prims_Ptr, RTE (RE_Address)); | |
7169 | Append_Elmt (Predef_Prims_Ptr, Access_Disp_Table (Typ)); | |
24971415 | 7170 | |
d00681a7 | 7171 | -- Import the forward declaration of the Dispatch Table wrapper |
d03ada96 | 7172 | -- record (Make_DT will take care of exporting it). |
24971415 | 7173 | |
d00681a7 | 7174 | if Building_Static_DT (Typ) then |
7175 | Set_Dispatch_Table_Wrappers (Typ, New_Elmt_List); | |
17e14451 | 7176 | |
d00681a7 | 7177 | DT := |
7178 | Make_Defining_Identifier (Loc, | |
7179 | Chars => New_External_Name (Tname, 'T')); | |
7180 | ||
7181 | Import_DT (Typ, DT, Is_Secondary_DT => False); | |
7182 | ||
7183 | if Has_DT (Typ) then | |
7184 | Append_To (Result, | |
7185 | Make_Object_Declaration (Loc, | |
7186 | Defining_Identifier => DT_Ptr, | |
7187 | Constant_Present => True, | |
7188 | Object_Definition => New_Reference_To (RTE (RE_Tag), Loc), | |
4055a532 | 7189 | Expression => |
d00681a7 | 7190 | Unchecked_Convert_To (RTE (RE_Tag), |
7191 | Make_Attribute_Reference (Loc, | |
4055a532 | 7192 | Prefix => |
d00681a7 | 7193 | Make_Selected_Component (Loc, |
4055a532 | 7194 | Prefix => New_Reference_To (DT, Loc), |
7195 | Selector_Name => | |
7196 | New_Occurrence_Of | |
7197 | (RTE_Record_Component (RE_Prims_Ptr), Loc)), | |
d00681a7 | 7198 | Attribute_Name => Name_Address)))); |
7199 | ||
7200 | -- Generate the SCIL node for the previous object declaration | |
7201 | -- because it has a tag initialization. | |
7202 | ||
7203 | if Generate_SCIL then | |
7204 | New_Node := | |
7205 | Make_SCIL_Dispatch_Table_Tag_Init (Sloc (Last (Result))); | |
7206 | Set_SCIL_Entity (New_Node, Typ); | |
7207 | Set_SCIL_Node (Last (Result), New_Node); | |
7208 | end if; | |
7209 | ||
7210 | Append_To (Result, | |
7211 | Make_Object_Declaration (Loc, | |
7212 | Defining_Identifier => Predef_Prims_Ptr, | |
7213 | Constant_Present => True, | |
4055a532 | 7214 | Object_Definition => |
7215 | New_Reference_To (RTE (RE_Address), Loc), | |
7216 | Expression => | |
d00681a7 | 7217 | Make_Attribute_Reference (Loc, |
4055a532 | 7218 | Prefix => |
d00681a7 | 7219 | Make_Selected_Component (Loc, |
4055a532 | 7220 | Prefix => New_Reference_To (DT, Loc), |
7221 | Selector_Name => | |
7222 | New_Occurrence_Of | |
7223 | (RTE_Record_Component (RE_Predef_Prims), Loc)), | |
d00681a7 | 7224 | Attribute_Name => Name_Address))); |
7225 | ||
7226 | -- No dispatch table required | |
7227 | ||
7228 | else | |
7229 | Append_To (Result, | |
7230 | Make_Object_Declaration (Loc, | |
7231 | Defining_Identifier => DT_Ptr, | |
7232 | Constant_Present => True, | |
7233 | Object_Definition => New_Reference_To (RTE (RE_Tag), Loc), | |
4055a532 | 7234 | Expression => |
d00681a7 | 7235 | Unchecked_Convert_To (RTE (RE_Tag), |
7236 | Make_Attribute_Reference (Loc, | |
4055a532 | 7237 | Prefix => |
d00681a7 | 7238 | Make_Selected_Component (Loc, |
7239 | Prefix => New_Reference_To (DT, Loc), | |
4055a532 | 7240 | Selector_Name => |
7241 | New_Occurrence_Of | |
7242 | (RTE_Record_Component (RE_NDT_Prims_Ptr), | |
7243 | Loc)), | |
d00681a7 | 7244 | Attribute_Name => Name_Address)))); |
7245 | end if; | |
7246 | ||
7247 | Set_Is_True_Constant (DT_Ptr); | |
7248 | Set_Is_Statically_Allocated (DT_Ptr); | |
7249 | end if; | |
7250 | end if; | |
17e14451 | 7251 | |
7252 | -- 2) Generate the secondary tag entities | |
7253 | ||
d00681a7 | 7254 | -- Collect the components associated with secondary dispatch tables |
7255 | ||
a652dd51 | 7256 | if Has_Interfaces (Typ) then |
d00681a7 | 7257 | Collect_Interface_Components (Typ, Typ_Comps); |
f301a57b | 7258 | |
d03ada96 | 7259 | -- For each interface type we build a unique external name associated |
7260 | -- with its secondary dispatch table. This name is used to declare an | |
7261 | -- object that references this secondary dispatch table, whose value | |
7262 | -- will be used for the elaboration of Typ objects, and also for the | |
7263 | -- elaboration of objects of types derived from Typ that do not | |
7264 | -- override the primitives of this interface type. | |
f301a57b | 7265 | |
7266 | Suffix_Index := 1; | |
17e14451 | 7267 | |
d00681a7 | 7268 | -- Note: The value of Suffix_Index must be in sync with the |
7269 | -- Suffix_Index values of secondary dispatch tables generated | |
7270 | -- by Make_DT. | |
17e14451 | 7271 | |
d00681a7 | 7272 | if Is_CPP_Class (Typ) then |
7273 | AI_Tag_Comp := First_Elmt (Typ_Comps); | |
7274 | while Present (AI_Tag_Comp) loop | |
7275 | Get_Secondary_DT_External_Name | |
7276 | (Typ, Related_Type (Node (AI_Tag_Comp)), Suffix_Index); | |
7277 | Typ_Name := Name_Find; | |
17e14451 | 7278 | |
d00681a7 | 7279 | -- Declare variables that will store the copy of the C++ |
d03ada96 | 7280 | -- secondary tags. |
f301a57b | 7281 | |
d00681a7 | 7282 | Iface_DT_Ptr := |
7283 | Make_Defining_Identifier (Loc, | |
7284 | Chars => New_External_Name (Typ_Name, 'P')); | |
7285 | Set_Etype (Iface_DT_Ptr, RTE (RE_Interface_Tag)); | |
7286 | Set_Ekind (Iface_DT_Ptr, E_Variable); | |
7287 | Set_Is_Tag (Iface_DT_Ptr); | |
acf97c11 | 7288 | |
d00681a7 | 7289 | Set_Has_Thunks (Iface_DT_Ptr); |
7290 | Set_Related_Type | |
7291 | (Iface_DT_Ptr, Related_Type (Node (AI_Tag_Comp))); | |
7292 | Append_Elmt (Iface_DT_Ptr, Access_Disp_Table (Typ)); | |
cdb1c38f | 7293 | |
f301a57b | 7294 | Append_To (Result, |
7295 | Make_Object_Declaration (Loc, | |
7296 | Defining_Identifier => Iface_DT_Ptr, | |
f301a57b | 7297 | Object_Definition => New_Reference_To |
7298 | (RTE (RE_Interface_Tag), Loc), | |
7299 | Expression => | |
7300 | Unchecked_Convert_To (RTE (RE_Interface_Tag), | |
d00681a7 | 7301 | New_Reference_To (RTE (RE_Null_Address), Loc)))); |
f301a57b | 7302 | |
d00681a7 | 7303 | Set_Is_Statically_Allocated (Iface_DT_Ptr, |
7304 | Is_Library_Level_Tagged_Type (Typ)); | |
acf97c11 | 7305 | |
d00681a7 | 7306 | Next_Elmt (AI_Tag_Comp); |
7307 | end loop; | |
acf97c11 | 7308 | |
d00681a7 | 7309 | -- This is not a CPP_Class type |
acf97c11 | 7310 | |
d00681a7 | 7311 | else |
7312 | AI_Tag_Comp := First_Elmt (Typ_Comps); | |
7313 | while Present (AI_Tag_Comp) loop | |
7314 | Get_Secondary_DT_External_Name | |
7315 | (Typ, Related_Type (Node (AI_Tag_Comp)), Suffix_Index); | |
7316 | Typ_Name := Name_Find; | |
17e14451 | 7317 | |
d00681a7 | 7318 | if Building_Static_DT (Typ) then |
7319 | Iface_DT := | |
7320 | Make_Defining_Identifier (Loc, | |
7321 | Chars => New_External_Name | |
7322 | (Typ_Name, 'T', Suffix_Index => -1)); | |
7323 | Import_DT | |
7324 | (Tag_Typ => Related_Type (Node (AI_Tag_Comp)), | |
7325 | DT => Iface_DT, | |
7326 | Is_Secondary_DT => True); | |
7327 | end if; | |
acf97c11 | 7328 | |
d00681a7 | 7329 | -- Secondary dispatch table referencing thunks to user-defined |
7330 | -- primitives covered by this interface. | |
acf97c11 | 7331 | |
d00681a7 | 7332 | Iface_DT_Ptr := |
7333 | Make_Defining_Identifier (Loc, | |
7334 | Chars => New_External_Name (Typ_Name, 'P')); | |
7335 | Set_Etype (Iface_DT_Ptr, RTE (RE_Interface_Tag)); | |
7336 | Set_Ekind (Iface_DT_Ptr, E_Constant); | |
7337 | Set_Is_Tag (Iface_DT_Ptr); | |
7338 | Set_Has_Thunks (Iface_DT_Ptr); | |
7339 | Set_Is_Statically_Allocated (Iface_DT_Ptr, | |
7340 | Is_Library_Level_Tagged_Type (Typ)); | |
7341 | Set_Is_True_Constant (Iface_DT_Ptr); | |
7342 | Set_Related_Type | |
7343 | (Iface_DT_Ptr, Related_Type (Node (AI_Tag_Comp))); | |
7344 | Append_Elmt (Iface_DT_Ptr, Access_Disp_Table (Typ)); | |
7345 | ||
7346 | if Building_Static_DT (Typ) then | |
7347 | Append_To (Result, | |
7348 | Make_Object_Declaration (Loc, | |
7349 | Defining_Identifier => Iface_DT_Ptr, | |
7350 | Constant_Present => True, | |
7351 | Object_Definition => New_Reference_To | |
7352 | (RTE (RE_Interface_Tag), Loc), | |
4055a532 | 7353 | Expression => |
d00681a7 | 7354 | Unchecked_Convert_To (RTE (RE_Interface_Tag), |
7355 | Make_Attribute_Reference (Loc, | |
4055a532 | 7356 | Prefix => |
d00681a7 | 7357 | Make_Selected_Component (Loc, |
4055a532 | 7358 | Prefix => |
7359 | New_Reference_To (Iface_DT, Loc), | |
7360 | Selector_Name => | |
7361 | New_Occurrence_Of | |
7362 | (RTE_Record_Component (RE_Prims_Ptr), | |
7363 | Loc)), | |
d00681a7 | 7364 | Attribute_Name => Name_Address)))); |
7365 | end if; | |
7366 | ||
7367 | -- Secondary dispatch table referencing thunks to predefined | |
7368 | -- primitives. | |
7369 | ||
7370 | Iface_DT_Ptr := | |
7371 | Make_Defining_Identifier (Loc, | |
7372 | Chars => New_External_Name (Typ_Name, 'Y')); | |
7373 | Set_Etype (Iface_DT_Ptr, RTE (RE_Address)); | |
7374 | Set_Ekind (Iface_DT_Ptr, E_Constant); | |
7375 | Set_Is_Tag (Iface_DT_Ptr); | |
7376 | Set_Has_Thunks (Iface_DT_Ptr); | |
7377 | Set_Is_Statically_Allocated (Iface_DT_Ptr, | |
7378 | Is_Library_Level_Tagged_Type (Typ)); | |
7379 | Set_Is_True_Constant (Iface_DT_Ptr); | |
7380 | Set_Related_Type | |
7381 | (Iface_DT_Ptr, Related_Type (Node (AI_Tag_Comp))); | |
7382 | Append_Elmt (Iface_DT_Ptr, Access_Disp_Table (Typ)); | |
7383 | ||
7384 | -- Secondary dispatch table referencing user-defined primitives | |
7385 | -- covered by this interface. | |
7386 | ||
7387 | Iface_DT_Ptr := | |
7388 | Make_Defining_Identifier (Loc, | |
7389 | Chars => New_External_Name (Typ_Name, 'D')); | |
7390 | Set_Etype (Iface_DT_Ptr, RTE (RE_Interface_Tag)); | |
7391 | Set_Ekind (Iface_DT_Ptr, E_Constant); | |
7392 | Set_Is_Tag (Iface_DT_Ptr); | |
7393 | Set_Is_Statically_Allocated (Iface_DT_Ptr, | |
7394 | Is_Library_Level_Tagged_Type (Typ)); | |
7395 | Set_Is_True_Constant (Iface_DT_Ptr); | |
7396 | Set_Related_Type | |
7397 | (Iface_DT_Ptr, Related_Type (Node (AI_Tag_Comp))); | |
7398 | Append_Elmt (Iface_DT_Ptr, Access_Disp_Table (Typ)); | |
7399 | ||
7400 | -- Secondary dispatch table referencing predefined primitives | |
7401 | ||
7402 | Iface_DT_Ptr := | |
7403 | Make_Defining_Identifier (Loc, | |
7404 | Chars => New_External_Name (Typ_Name, 'Z')); | |
7405 | Set_Etype (Iface_DT_Ptr, RTE (RE_Address)); | |
7406 | Set_Ekind (Iface_DT_Ptr, E_Constant); | |
7407 | Set_Is_Tag (Iface_DT_Ptr); | |
7408 | Set_Is_Statically_Allocated (Iface_DT_Ptr, | |
7409 | Is_Library_Level_Tagged_Type (Typ)); | |
7410 | Set_Is_True_Constant (Iface_DT_Ptr); | |
7411 | Set_Related_Type | |
7412 | (Iface_DT_Ptr, Related_Type (Node (AI_Tag_Comp))); | |
7413 | Append_Elmt (Iface_DT_Ptr, Access_Disp_Table (Typ)); | |
7414 | ||
7415 | Next_Elmt (AI_Tag_Comp); | |
7416 | end loop; | |
7417 | end if; | |
17e14451 | 7418 | end if; |
7419 | ||
dffd0a90 | 7420 | -- 3) At the end of Access_Disp_Table, if the type has user-defined |
7421 | -- primitives, we add the entity of an access type declaration that | |
7422 | -- is used by Build_Get_Prim_Op_Address to expand dispatching calls | |
7423 | -- through the primary dispatch table. | |
7424 | ||
7425 | if UI_To_Int (DT_Entry_Count (First_Tag_Component (Typ))) = 0 then | |
7426 | Analyze_List (Result); | |
17e14451 | 7427 | |
7428 | -- Generate: | |
cc60bd16 | 7429 | -- type Typ_DT is array (1 .. Nb_Prims) of Prim_Ptr; |
17e14451 | 7430 | -- type Typ_DT_Acc is access Typ_DT; |
7431 | ||
dffd0a90 | 7432 | else |
7433 | declare | |
7434 | Name_DT_Prims : constant Name_Id := | |
7435 | New_External_Name (Tname, 'G'); | |
7436 | Name_DT_Prims_Acc : constant Name_Id := | |
7437 | New_External_Name (Tname, 'H'); | |
7438 | DT_Prims : constant Entity_Id := | |
7439 | Make_Defining_Identifier (Loc, | |
7440 | Name_DT_Prims); | |
7441 | DT_Prims_Acc : constant Entity_Id := | |
7442 | Make_Defining_Identifier (Loc, | |
7443 | Name_DT_Prims_Acc); | |
7444 | begin | |
7445 | Append_To (Result, | |
7446 | Make_Full_Type_Declaration (Loc, | |
7447 | Defining_Identifier => DT_Prims, | |
7448 | Type_Definition => | |
7449 | Make_Constrained_Array_Definition (Loc, | |
7450 | Discrete_Subtype_Definitions => New_List ( | |
7451 | Make_Range (Loc, | |
7452 | Low_Bound => Make_Integer_Literal (Loc, 1), | |
7453 | High_Bound => Make_Integer_Literal (Loc, | |
7454 | DT_Entry_Count | |
7455 | (First_Tag_Component (Typ))))), | |
7456 | Component_Definition => | |
7457 | Make_Component_Definition (Loc, | |
7458 | Subtype_Indication => | |
7459 | New_Reference_To (RTE (RE_Prim_Ptr), Loc))))); | |
17e14451 | 7460 | |
dffd0a90 | 7461 | Append_To (Result, |
7462 | Make_Full_Type_Declaration (Loc, | |
7463 | Defining_Identifier => DT_Prims_Acc, | |
7464 | Type_Definition => | |
7465 | Make_Access_To_Object_Definition (Loc, | |
7466 | Subtype_Indication => | |
7467 | New_Occurrence_Of (DT_Prims, Loc)))); | |
17e14451 | 7468 | |
dffd0a90 | 7469 | Append_Elmt (DT_Prims_Acc, Access_Disp_Table (Typ)); |
17e14451 | 7470 | |
dffd0a90 | 7471 | -- Analyze the resulting list and suppress the generation of the |
7472 | -- Init_Proc associated with the above array declaration because | |
7473 | -- this type is never used in object declarations. It is only used | |
7474 | -- to simplify the expansion associated with dispatching calls. | |
17e14451 | 7475 | |
dffd0a90 | 7476 | Analyze_List (Result); |
649455a4 | 7477 | Set_Suppress_Initialization (Base_Type (DT_Prims)); |
cc60bd16 | 7478 | |
ff6293ec | 7479 | -- Disable backend optimizations based on assumptions about the |
7480 | -- aliasing status of objects designated by the access to the | |
7481 | -- dispatch table. Required to handle dispatch tables imported | |
7482 | -- from C++. | |
7483 | ||
7484 | Set_No_Strict_Aliasing (Base_Type (DT_Prims_Acc)); | |
7485 | ||
d00681a7 | 7486 | -- Add the freezing nodes of these declarations; required to avoid |
7487 | -- generating these freezing nodes in wrong scopes (for example in | |
7488 | -- the IC routine of a derivation of Typ). | |
d03ada96 | 7489 | -- What is an "IC routine"? Is "init_proc" meant here??? |
d00681a7 | 7490 | |
d74fc39a | 7491 | Append_List_To (Result, Freeze_Entity (DT_Prims, Typ)); |
7492 | Append_List_To (Result, Freeze_Entity (DT_Prims_Acc, Typ)); | |
d00681a7 | 7493 | |
dffd0a90 | 7494 | -- Mark entity of dispatch table. Required by the back end to |
7495 | -- handle them properly. | |
cc60bd16 | 7496 | |
dffd0a90 | 7497 | Set_Is_Dispatch_Table_Entity (DT_Prims); |
7498 | end; | |
7499 | end if; | |
17e14451 | 7500 | |
11bd2f46 | 7501 | -- Mark entities of dispatch table. Required by the back end to handle |
7502 | -- them properly. | |
7640ed3d | 7503 | |
7504 | if Present (DT) then | |
7505 | Set_Is_Dispatch_Table_Entity (DT); | |
7506 | Set_Is_Dispatch_Table_Entity (Etype (DT)); | |
7507 | end if; | |
7508 | ||
d04be62f | 7509 | if Present (Iface_DT) then |
7510 | Set_Is_Dispatch_Table_Entity (Iface_DT); | |
7511 | Set_Is_Dispatch_Table_Entity (Etype (Iface_DT)); | |
7512 | end if; | |
7513 | ||
d00681a7 | 7514 | if Is_CPP_Class (Root_Type (Typ)) then |
7515 | Set_Ekind (DT_Ptr, E_Variable); | |
7516 | else | |
7517 | Set_Ekind (DT_Ptr, E_Constant); | |
7518 | end if; | |
7519 | ||
cdb1c38f | 7520 | Set_Is_Tag (DT_Ptr); |
7521 | Set_Related_Type (DT_Ptr, Typ); | |
7522 | ||
17e14451 | 7523 | return Result; |
7524 | end Make_Tags; | |
7525 | ||
cd534f03 | 7526 | --------------- |
7527 | -- New_Value -- | |
7528 | --------------- | |
7529 | ||
7530 | function New_Value (From : Node_Id) return Node_Id is | |
7531 | Res : constant Node_Id := Duplicate_Subexpr (From); | |
7532 | begin | |
7533 | if Is_Access_Type (Etype (From)) then | |
9af28f61 | 7534 | return |
7535 | Make_Explicit_Dereference (Sloc (From), | |
7536 | Prefix => Res); | |
cd534f03 | 7537 | else |
7538 | return Res; | |
7539 | end if; | |
7540 | end New_Value; | |
7541 | ||
ee6ba406 | 7542 | ----------------------------------- |
7543 | -- Original_View_In_Visible_Part -- | |
7544 | ----------------------------------- | |
7545 | ||
7546 | function Original_View_In_Visible_Part (Typ : Entity_Id) return Boolean is | |
7547 | Scop : constant Entity_Id := Scope (Typ); | |
7548 | ||
7549 | begin | |
7550 | -- The scope must be a package | |
7551 | ||
65149aa0 | 7552 | if not Is_Package_Or_Generic_Package (Scop) then |
ee6ba406 | 7553 | return False; |
7554 | end if; | |
7555 | ||
7556 | -- A type with a private declaration has a private view declared in | |
7557 | -- the visible part. | |
7558 | ||
7559 | if Has_Private_Declaration (Typ) then | |
7560 | return True; | |
7561 | end if; | |
7562 | ||
7563 | return List_Containing (Parent (Typ)) = | |
7564 | Visible_Declarations (Specification (Unit_Declaration_Node (Scop))); | |
7565 | end Original_View_In_Visible_Part; | |
7566 | ||
d62940bf | 7567 | ------------------ |
7568 | -- Prim_Op_Kind -- | |
7569 | ------------------ | |
7570 | ||
7571 | function Prim_Op_Kind | |
7572 | (Prim : Entity_Id; | |
7573 | Typ : Entity_Id) return Node_Id | |
7574 | is | |
7575 | Full_Typ : Entity_Id := Typ; | |
7576 | Loc : constant Source_Ptr := Sloc (Prim); | |
68f95949 | 7577 | Prim_Op : Entity_Id; |
d62940bf | 7578 | |
7579 | begin | |
7580 | -- Retrieve the original primitive operation | |
7581 | ||
fc2907f6 | 7582 | Prim_Op := Ultimate_Alias (Prim); |
d62940bf | 7583 | |
7584 | if Ekind (Typ) = E_Record_Type | |
7585 | and then Present (Corresponding_Concurrent_Type (Typ)) | |
7586 | then | |
7587 | Full_Typ := Corresponding_Concurrent_Type (Typ); | |
7588 | end if; | |
7589 | ||
d77e048b | 7590 | -- When a private tagged type is completed by a concurrent type, |
7591 | -- retrieve the full view. | |
7592 | ||
7593 | if Is_Private_Type (Full_Typ) then | |
7594 | Full_Typ := Full_View (Full_Typ); | |
7595 | end if; | |
7596 | ||
d62940bf | 7597 | if Ekind (Prim_Op) = E_Function then |
7598 | ||
7599 | -- Protected function | |
7600 | ||
7601 | if Ekind (Full_Typ) = E_Protected_Type then | |
7602 | return New_Reference_To (RTE (RE_POK_Protected_Function), Loc); | |
7603 | ||
76a1c25b | 7604 | -- Task function |
7605 | ||
7606 | elsif Ekind (Full_Typ) = E_Task_Type then | |
7607 | return New_Reference_To (RTE (RE_POK_Task_Function), Loc); | |
7608 | ||
d62940bf | 7609 | -- Regular function |
7610 | ||
7611 | else | |
7612 | return New_Reference_To (RTE (RE_POK_Function), Loc); | |
7613 | end if; | |
7614 | ||
7615 | else | |
7616 | pragma Assert (Ekind (Prim_Op) = E_Procedure); | |
7617 | ||
7618 | if Ekind (Full_Typ) = E_Protected_Type then | |
7619 | ||
7620 | -- Protected entry | |
7621 | ||
7622 | if Is_Primitive_Wrapper (Prim_Op) | |
7623 | and then Ekind (Wrapped_Entity (Prim_Op)) = E_Entry | |
7624 | then | |
7625 | return New_Reference_To (RTE (RE_POK_Protected_Entry), Loc); | |
7626 | ||
7627 | -- Protected procedure | |
7628 | ||
7629 | else | |
7630 | return New_Reference_To (RTE (RE_POK_Protected_Procedure), Loc); | |
7631 | end if; | |
7632 | ||
7633 | elsif Ekind (Full_Typ) = E_Task_Type then | |
7634 | ||
7635 | -- Task entry | |
7636 | ||
7637 | if Is_Primitive_Wrapper (Prim_Op) | |
7638 | and then Ekind (Wrapped_Entity (Prim_Op)) = E_Entry | |
7639 | then | |
7640 | return New_Reference_To (RTE (RE_POK_Task_Entry), Loc); | |
7641 | ||
7642 | -- Task "procedure". These are the internally Expander-generated | |
7643 | -- procedures (task body for instance). | |
7644 | ||
7645 | else | |
7646 | return New_Reference_To (RTE (RE_POK_Task_Procedure), Loc); | |
7647 | end if; | |
7648 | ||
7649 | -- Regular procedure | |
7650 | ||
7651 | else | |
7652 | return New_Reference_To (RTE (RE_POK_Procedure), Loc); | |
7653 | end if; | |
7654 | end if; | |
7655 | end Prim_Op_Kind; | |
7656 | ||
725a69d2 | 7657 | ------------------------ |
7658 | -- Register_Primitive -- | |
7659 | ------------------------ | |
7660 | ||
49260fa5 | 7661 | function Register_Primitive |
725a69d2 | 7662 | (Loc : Source_Ptr; |
49260fa5 | 7663 | Prim : Entity_Id) return List_Id |
725a69d2 | 7664 | is |
cdb1c38f | 7665 | DT_Ptr : Entity_Id; |
7666 | Iface_Prim : Entity_Id; | |
7667 | Iface_Typ : Entity_Id; | |
7668 | Iface_DT_Ptr : Entity_Id; | |
7669 | Iface_DT_Elmt : Elmt_Id; | |
49260fa5 | 7670 | L : constant List_Id := New_List; |
cdb1c38f | 7671 | Pos : Uint; |
7672 | Tag : Entity_Id; | |
cc60bd16 | 7673 | Tag_Typ : Entity_Id; |
cdb1c38f | 7674 | Thunk_Id : Entity_Id; |
7675 | Thunk_Code : Node_Id; | |
725a69d2 | 7676 | |
7677 | begin | |
7678 | pragma Assert (not Restriction_Active (No_Dispatching_Calls)); | |
79500ea0 | 7679 | pragma Assert (VM_Target = No_VM); |
725a69d2 | 7680 | |
3f8cf2d2 | 7681 | -- Do not register in the dispatch table eliminated primitives |
7682 | ||
7683 | if not RTE_Available (RE_Tag) | |
7684 | or else Is_Eliminated (Ultimate_Alias (Prim)) | |
7685 | then | |
49260fa5 | 7686 | return L; |
725a69d2 | 7687 | end if; |
7688 | ||
a652dd51 | 7689 | if not Present (Interface_Alias (Prim)) then |
cc60bd16 | 7690 | Tag_Typ := Scope (DTC_Entity (Prim)); |
acf97c11 | 7691 | Pos := DT_Position (Prim); |
cc60bd16 | 7692 | Tag := First_Tag_Component (Tag_Typ); |
725a69d2 | 7693 | |
7694 | if Is_Predefined_Dispatching_Operation (Prim) | |
7695 | or else Is_Predefined_Dispatching_Alias (Prim) | |
7696 | then | |
cc60bd16 | 7697 | DT_Ptr := |
7698 | Node (Next_Elmt (First_Elmt (Access_Disp_Table (Tag_Typ)))); | |
7699 | ||
49260fa5 | 7700 | Append_To (L, |
725a69d2 | 7701 | Build_Set_Predefined_Prim_Op_Address (Loc, |
7702 | Tag_Node => New_Reference_To (DT_Ptr, Loc), | |
7703 | Position => Pos, | |
acf97c11 | 7704 | Address_Node => |
cc60bd16 | 7705 | Unchecked_Convert_To (RTE (RE_Prim_Ptr), |
acf97c11 | 7706 | Make_Attribute_Reference (Loc, |
4055a532 | 7707 | Prefix => New_Reference_To (Prim, Loc), |
acf97c11 | 7708 | Attribute_Name => Name_Unrestricted_Access)))); |
725a69d2 | 7709 | |
9e7de1e1 | 7710 | -- Register copy of the pointer to the 'size primitive in the TSD |
cc60bd16 | 7711 | |
7712 | if Chars (Prim) = Name_uSize | |
7713 | and then RTE_Record_Component_Available (RE_Size_Func) | |
7714 | then | |
7715 | DT_Ptr := Node (First_Elmt (Access_Disp_Table (Tag_Typ))); | |
49260fa5 | 7716 | Append_To (L, |
cc60bd16 | 7717 | Build_Set_Size_Function (Loc, |
7718 | Tag_Node => New_Reference_To (DT_Ptr, Loc), | |
7719 | Size_Func => Prim)); | |
7720 | end if; | |
7721 | ||
725a69d2 | 7722 | else |
7723 | pragma Assert (Pos /= Uint_0 and then Pos <= DT_Entry_Count (Tag)); | |
7724 | ||
d00681a7 | 7725 | -- Skip registration of primitives located in the C++ part of the |
7726 | -- dispatch table. Their slot is set by the IC routine. | |
7727 | ||
7728 | if not Is_CPP_Class (Root_Type (Tag_Typ)) | |
7729 | or else Pos > CPP_Num_Prims (Tag_Typ) | |
7730 | then | |
7731 | DT_Ptr := Node (First_Elmt (Access_Disp_Table (Tag_Typ))); | |
7732 | Append_To (L, | |
7733 | Build_Set_Prim_Op_Address (Loc, | |
7734 | Typ => Tag_Typ, | |
7735 | Tag_Node => New_Reference_To (DT_Ptr, Loc), | |
7736 | Position => Pos, | |
7737 | Address_Node => | |
7738 | Unchecked_Convert_To (RTE (RE_Prim_Ptr), | |
7739 | Make_Attribute_Reference (Loc, | |
4055a532 | 7740 | Prefix => New_Reference_To (Prim, Loc), |
d00681a7 | 7741 | Attribute_Name => Name_Unrestricted_Access)))); |
7742 | end if; | |
725a69d2 | 7743 | end if; |
7744 | ||
7745 | -- Ada 2005 (AI-251): Primitive associated with an interface type | |
7746 | -- Generate the code of the thunk only if the interface type is not an | |
7747 | -- immediate ancestor of Typ; otherwise the dispatch table associated | |
7748 | -- with the interface is the primary dispatch table and we have nothing | |
7749 | -- else to do here. | |
7750 | ||
7751 | else | |
cc60bd16 | 7752 | Tag_Typ := Find_Dispatching_Type (Alias (Prim)); |
a652dd51 | 7753 | Iface_Typ := Find_Dispatching_Type (Interface_Alias (Prim)); |
725a69d2 | 7754 | |
7755 | pragma Assert (Is_Interface (Iface_Typ)); | |
7756 | ||
c8da6114 | 7757 | -- No action needed for interfaces that are ancestors of Typ because |
7758 | -- their primitives are located in the primary dispatch table. | |
7759 | ||
cb4af01d | 7760 | if Is_Ancestor (Iface_Typ, Tag_Typ, Use_Full_View => True) then |
c8da6114 | 7761 | return L; |
d00681a7 | 7762 | |
7763 | -- No action needed for primitives located in the C++ part of the | |
7764 | -- dispatch table. Their slot is set by the IC routine. | |
7765 | ||
7766 | elsif Is_CPP_Class (Root_Type (Tag_Typ)) | |
7767 | and then DT_Position (Alias (Prim)) <= CPP_Num_Prims (Tag_Typ) | |
7768 | and then not Is_Predefined_Dispatching_Operation (Prim) | |
7769 | and then not Is_Predefined_Dispatching_Alias (Prim) | |
7770 | then | |
7771 | return L; | |
c8da6114 | 7772 | end if; |
7773 | ||
17e14451 | 7774 | Expand_Interface_Thunk (Prim, Thunk_Id, Thunk_Code); |
725a69d2 | 7775 | |
cb4af01d | 7776 | if not Is_Ancestor (Iface_Typ, Tag_Typ, Use_Full_View => True) |
725a69d2 | 7777 | and then Present (Thunk_Code) |
7778 | then | |
725a69d2 | 7779 | -- Generate the code necessary to fill the appropriate entry of |
7780 | -- the secondary dispatch table of Prim's controlling type with | |
7781 | -- Thunk_Id's address. | |
7782 | ||
cc60bd16 | 7783 | Iface_DT_Elmt := Find_Interface_ADT (Tag_Typ, Iface_Typ); |
cdb1c38f | 7784 | Iface_DT_Ptr := Node (Iface_DT_Elmt); |
7785 | pragma Assert (Has_Thunks (Iface_DT_Ptr)); | |
7786 | ||
a652dd51 | 7787 | Iface_Prim := Interface_Alias (Prim); |
acf97c11 | 7788 | Pos := DT_Position (Iface_Prim); |
7789 | Tag := First_Tag_Component (Iface_Typ); | |
49260fa5 | 7790 | |
7791 | Prepend_To (L, Thunk_Code); | |
725a69d2 | 7792 | |
7793 | if Is_Predefined_Dispatching_Operation (Prim) | |
7794 | or else Is_Predefined_Dispatching_Alias (Prim) | |
7795 | then | |
cdb1c38f | 7796 | Append_To (L, |
725a69d2 | 7797 | Build_Set_Predefined_Prim_Op_Address (Loc, |
acf97c11 | 7798 | Tag_Node => |
7799 | New_Reference_To (Node (Next_Elmt (Iface_DT_Elmt)), Loc), | |
725a69d2 | 7800 | Position => Pos, |
7801 | Address_Node => | |
cc60bd16 | 7802 | Unchecked_Convert_To (RTE (RE_Prim_Ptr), |
acf97c11 | 7803 | Make_Attribute_Reference (Loc, |
7804 | Prefix => New_Reference_To (Thunk_Id, Loc), | |
7805 | Attribute_Name => Name_Unrestricted_Access)))); | |
cdb1c38f | 7806 | |
acf97c11 | 7807 | Next_Elmt (Iface_DT_Elmt); |
cdb1c38f | 7808 | Next_Elmt (Iface_DT_Elmt); |
7809 | Iface_DT_Ptr := Node (Iface_DT_Elmt); | |
7810 | pragma Assert (not Has_Thunks (Iface_DT_Ptr)); | |
7811 | ||
7812 | Append_To (L, | |
7813 | Build_Set_Predefined_Prim_Op_Address (Loc, | |
acf97c11 | 7814 | Tag_Node => |
7815 | New_Reference_To (Node (Next_Elmt (Iface_DT_Elmt)), Loc), | |
cdb1c38f | 7816 | Position => Pos, |
7817 | Address_Node => | |
cc60bd16 | 7818 | Unchecked_Convert_To (RTE (RE_Prim_Ptr), |
acf97c11 | 7819 | Make_Attribute_Reference (Loc, |
4055a532 | 7820 | Prefix => |
7821 | New_Reference_To (Alias (Prim), Loc), | |
acf97c11 | 7822 | Attribute_Name => Name_Unrestricted_Access)))); |
cdb1c38f | 7823 | |
725a69d2 | 7824 | else |
7825 | pragma Assert (Pos /= Uint_0 | |
7826 | and then Pos <= DT_Entry_Count (Tag)); | |
7827 | ||
cdb1c38f | 7828 | Append_To (L, |
7829 | Build_Set_Prim_Op_Address (Loc, | |
7830 | Typ => Iface_Typ, | |
7831 | Tag_Node => New_Reference_To (Iface_DT_Ptr, Loc), | |
7832 | Position => Pos, | |
acf97c11 | 7833 | Address_Node => |
cc60bd16 | 7834 | Unchecked_Convert_To (RTE (RE_Prim_Ptr), |
acf97c11 | 7835 | Make_Attribute_Reference (Loc, |
7836 | Prefix => New_Reference_To (Thunk_Id, Loc), | |
7837 | Attribute_Name => Name_Unrestricted_Access)))); | |
cdb1c38f | 7838 | |
acf97c11 | 7839 | Next_Elmt (Iface_DT_Elmt); |
cdb1c38f | 7840 | Next_Elmt (Iface_DT_Elmt); |
7841 | Iface_DT_Ptr := Node (Iface_DT_Elmt); | |
7842 | pragma Assert (not Has_Thunks (Iface_DT_Ptr)); | |
7843 | ||
7844 | Append_To (L, | |
725a69d2 | 7845 | Build_Set_Prim_Op_Address (Loc, |
7846 | Typ => Iface_Typ, | |
7847 | Tag_Node => New_Reference_To (Iface_DT_Ptr, Loc), | |
7848 | Position => Pos, | |
acf97c11 | 7849 | Address_Node => |
cc60bd16 | 7850 | Unchecked_Convert_To (RTE (RE_Prim_Ptr), |
acf97c11 | 7851 | Make_Attribute_Reference (Loc, |
4055a532 | 7852 | Prefix => |
7853 | New_Reference_To (Alias (Prim), Loc), | |
acf97c11 | 7854 | Attribute_Name => Name_Unrestricted_Access)))); |
cdb1c38f | 7855 | |
725a69d2 | 7856 | end if; |
7857 | end if; | |
7858 | end if; | |
49260fa5 | 7859 | |
7860 | return L; | |
725a69d2 | 7861 | end Register_Primitive; |
7862 | ||
ee6ba406 | 7863 | ------------------------- |
7864 | -- Set_All_DT_Position -- | |
7865 | ------------------------- | |
7866 | ||
7867 | procedure Set_All_DT_Position (Typ : Entity_Id) is | |
ee6ba406 | 7868 | |
cf365b48 | 7869 | function In_Predef_Prims_DT (Prim : Entity_Id) return Boolean; |
7870 | -- Returns True if Prim is located in the dispatch table of | |
7871 | -- predefined primitives | |
7872 | ||
aad6babd | 7873 | procedure Validate_Position (Prim : Entity_Id); |
36b938a3 | 7874 | -- Check that the position assigned to Prim is completely safe |
aad6babd | 7875 | -- (it has not been assigned to a previously defined primitive |
7876 | -- operation of Typ) | |
7877 | ||
cf365b48 | 7878 | ------------------------ |
7879 | -- In_Predef_Prims_DT -- | |
7880 | ------------------------ | |
7881 | ||
7882 | function In_Predef_Prims_DT (Prim : Entity_Id) return Boolean is | |
7883 | E : Entity_Id; | |
7884 | ||
7885 | begin | |
7886 | -- Predefined primitives | |
7887 | ||
7888 | if Is_Predefined_Dispatching_Operation (Prim) then | |
7889 | return True; | |
7890 | ||
7891 | -- Renamings of predefined primitives | |
7892 | ||
7893 | elsif Present (Alias (Prim)) | |
7894 | and then Is_Predefined_Dispatching_Operation (Ultimate_Alias (Prim)) | |
7895 | then | |
7896 | if Chars (Ultimate_Alias (Prim)) /= Name_Op_Eq then | |
7897 | return True; | |
7898 | ||
7899 | -- User-defined renamings of predefined equality have their own | |
7900 | -- slot in the primary dispatch table | |
7901 | ||
7902 | else | |
7903 | E := Prim; | |
7904 | while Present (Alias (E)) loop | |
7905 | if Comes_From_Source (E) then | |
7906 | return False; | |
7907 | end if; | |
7908 | ||
7909 | E := Alias (E); | |
7910 | end loop; | |
7911 | ||
7912 | return not Comes_From_Source (E); | |
7913 | end if; | |
7914 | ||
7915 | -- User-defined primitives | |
7916 | ||
7917 | else | |
7918 | return False; | |
7919 | end if; | |
7920 | end In_Predef_Prims_DT; | |
7921 | ||
aad6babd | 7922 | ----------------------- |
7923 | -- Validate_Position -- | |
7924 | ----------------------- | |
7925 | ||
7926 | procedure Validate_Position (Prim : Entity_Id) is | |
af647dc7 | 7927 | Op_Elmt : Elmt_Id; |
7928 | Op : Entity_Id; | |
d62940bf | 7929 | |
aad6babd | 7930 | begin |
af647dc7 | 7931 | -- Aliased primitives are safe |
7932 | ||
7933 | if Present (Alias (Prim)) then | |
7934 | return; | |
7935 | end if; | |
7936 | ||
7937 | Op_Elmt := First_Elmt (Primitive_Operations (Typ)); | |
7938 | while Present (Op_Elmt) loop | |
7939 | Op := Node (Op_Elmt); | |
7940 | ||
7941 | -- No need to check against itself | |
7942 | ||
7943 | if Op = Prim then | |
7944 | null; | |
7945 | ||
aad6babd | 7946 | -- Primitive operations covering abstract interfaces are |
7947 | -- allocated later | |
7948 | ||
a652dd51 | 7949 | elsif Present (Interface_Alias (Op)) then |
aad6babd | 7950 | null; |
7951 | ||
68f95949 | 7952 | -- Predefined dispatching operations are completely safe. They |
7953 | -- are allocated at fixed positions in a separate table. | |
aad6babd | 7954 | |
af647dc7 | 7955 | elsif Is_Predefined_Dispatching_Operation (Op) |
7956 | or else Is_Predefined_Dispatching_Alias (Op) | |
7957 | then | |
aad6babd | 7958 | null; |
ee6ba406 | 7959 | |
aad6babd | 7960 | -- Aliased subprograms are safe |
7961 | ||
af647dc7 | 7962 | elsif Present (Alias (Op)) then |
aad6babd | 7963 | null; |
7964 | ||
af647dc7 | 7965 | elsif DT_Position (Op) = DT_Position (Prim) |
7966 | and then not Is_Predefined_Dispatching_Operation (Op) | |
7967 | and then not Is_Predefined_Dispatching_Operation (Prim) | |
7968 | and then not Is_Predefined_Dispatching_Alias (Op) | |
7969 | and then not Is_Predefined_Dispatching_Alias (Prim) | |
7970 | then | |
d62940bf | 7971 | |
7972 | -- Handle aliased subprograms | |
7973 | ||
7974 | declare | |
7975 | Op_1 : Entity_Id; | |
7976 | Op_2 : Entity_Id; | |
7977 | ||
7978 | begin | |
af647dc7 | 7979 | Op_1 := Op; |
d62940bf | 7980 | loop |
7981 | if Present (Overridden_Operation (Op_1)) then | |
7982 | Op_1 := Overridden_Operation (Op_1); | |
7983 | elsif Present (Alias (Op_1)) then | |
7984 | Op_1 := Alias (Op_1); | |
7985 | else | |
7986 | exit; | |
7987 | end if; | |
7988 | end loop; | |
7989 | ||
7990 | Op_2 := Prim; | |
7991 | loop | |
7992 | if Present (Overridden_Operation (Op_2)) then | |
7993 | Op_2 := Overridden_Operation (Op_2); | |
7994 | elsif Present (Alias (Op_2)) then | |
7995 | Op_2 := Alias (Op_2); | |
7996 | else | |
7997 | exit; | |
7998 | end if; | |
7999 | end loop; | |
8000 | ||
8001 | if Op_1 /= Op_2 then | |
8002 | raise Program_Error; | |
8003 | end if; | |
8004 | end; | |
aad6babd | 8005 | end if; |
8006 | ||
af647dc7 | 8007 | Next_Elmt (Op_Elmt); |
aad6babd | 8008 | end loop; |
8009 | end Validate_Position; | |
8010 | ||
af647dc7 | 8011 | -- Local variables |
8012 | ||
8013 | Parent_Typ : constant Entity_Id := Etype (Typ); | |
af647dc7 | 8014 | First_Prim : constant Elmt_Id := First_Elmt (Primitive_Operations (Typ)); |
8015 | The_Tag : constant Entity_Id := First_Tag_Component (Typ); | |
8016 | ||
651a38ec | 8017 | Adjusted : Boolean := False; |
8018 | Finalized : Boolean := False; | |
af647dc7 | 8019 | |
343d35dc | 8020 | Count_Prim : Nat; |
8021 | DT_Length : Nat; | |
8022 | Nb_Prim : Nat; | |
af647dc7 | 8023 | Prim : Entity_Id; |
8024 | Prim_Elmt : Elmt_Id; | |
8025 | ||
aad6babd | 8026 | -- Start of processing for Set_All_DT_Position |
8027 | ||
8028 | begin | |
a652dd51 | 8029 | pragma Assert (Present (First_Tag_Component (Typ))); |
8030 | ||
b3dd22b3 | 8031 | -- Set the DT_Position for each primitive operation. Perform some sanity |
8032 | -- checks to avoid building inconsistent dispatch tables. | |
ee6ba406 | 8033 | |
b3dd22b3 | 8034 | -- First stage: Set the DTC entity of all the primitive operations. This |
8035 | -- is required to properly read the DT_Position attribute in the latter | |
8036 | -- stages. | |
ee6ba406 | 8037 | |
343d35dc | 8038 | Prim_Elmt := First_Prim; |
8039 | Count_Prim := 0; | |
8040 | while Present (Prim_Elmt) loop | |
8041 | Prim := Node (Prim_Elmt); | |
ee6ba406 | 8042 | |
343d35dc | 8043 | -- Predefined primitives have a separate dispatch table |
ee6ba406 | 8044 | |
cf365b48 | 8045 | if not In_Predef_Prims_DT (Prim) then |
343d35dc | 8046 | Count_Prim := Count_Prim + 1; |
8047 | end if; | |
ee6ba406 | 8048 | |
725a69d2 | 8049 | Set_DTC_Entity_Value (Typ, Prim); |
ee6ba406 | 8050 | |
343d35dc | 8051 | -- Clear any previous value of the DT_Position attribute. In this |
8052 | -- way we ensure that the final position of all the primitives is | |
36b938a3 | 8053 | -- established by the following stages of this algorithm. |
ee6ba406 | 8054 | |
343d35dc | 8055 | Set_DT_Position (Prim, No_Uint); |
ee6ba406 | 8056 | |
343d35dc | 8057 | Next_Elmt (Prim_Elmt); |
8058 | end loop; | |
ee6ba406 | 8059 | |
343d35dc | 8060 | declare |
acf97c11 | 8061 | Fixed_Prim : array (Int range 0 .. Count_Prim) of Boolean := |
8062 | (others => False); | |
8063 | ||
343d35dc | 8064 | E : Entity_Id; |
ee6ba406 | 8065 | |
725a69d2 | 8066 | procedure Handle_Inherited_Private_Subprograms (Typ : Entity_Id); |
8067 | -- Called if Typ is declared in a nested package or a public child | |
8068 | -- package to handle inherited primitives that were inherited by Typ | |
8069 | -- in the visible part, but whose declaration was deferred because | |
8070 | -- the parent operation was private and not visible at that point. | |
8071 | ||
343d35dc | 8072 | procedure Set_Fixed_Prim (Pos : Nat); |
8073 | -- Sets to true an element of the Fixed_Prim table to indicate | |
8074 | -- that this entry of the dispatch table of Typ is occupied. | |
ee6ba406 | 8075 | |
725a69d2 | 8076 | ------------------------------------------ |
8077 | -- Handle_Inherited_Private_Subprograms -- | |
8078 | ------------------------------------------ | |
8079 | ||
8080 | procedure Handle_Inherited_Private_Subprograms (Typ : Entity_Id) is | |
8081 | Op_List : Elist_Id; | |
8082 | Op_Elmt : Elmt_Id; | |
8083 | Op_Elmt_2 : Elmt_Id; | |
8084 | Prim_Op : Entity_Id; | |
8085 | Parent_Subp : Entity_Id; | |
8086 | ||
8087 | begin | |
8088 | Op_List := Primitive_Operations (Typ); | |
8089 | ||
8090 | Op_Elmt := First_Elmt (Op_List); | |
8091 | while Present (Op_Elmt) loop | |
8092 | Prim_Op := Node (Op_Elmt); | |
8093 | ||
8094 | -- Search primitives that are implicit operations with an | |
8095 | -- internal name whose parent operation has a normal name. | |
8096 | ||
8097 | if Present (Alias (Prim_Op)) | |
8098 | and then Find_Dispatching_Type (Alias (Prim_Op)) /= Typ | |
8099 | and then not Comes_From_Source (Prim_Op) | |
8100 | and then Is_Internal_Name (Chars (Prim_Op)) | |
8101 | and then not Is_Internal_Name (Chars (Alias (Prim_Op))) | |
8102 | then | |
8103 | Parent_Subp := Alias (Prim_Op); | |
8104 | ||
8105 | -- Check if the type has an explicit overriding for this | |
8106 | -- primitive. | |
8107 | ||
8108 | Op_Elmt_2 := Next_Elmt (Op_Elmt); | |
8109 | while Present (Op_Elmt_2) loop | |
8110 | if Chars (Node (Op_Elmt_2)) = Chars (Parent_Subp) | |
8111 | and then Type_Conformant (Prim_Op, Node (Op_Elmt_2)) | |
8112 | then | |
8113 | Set_DT_Position (Prim_Op, DT_Position (Parent_Subp)); | |
8114 | Set_DT_Position (Node (Op_Elmt_2), | |
8115 | DT_Position (Parent_Subp)); | |
8116 | Set_Fixed_Prim (UI_To_Int (DT_Position (Prim_Op))); | |
8117 | ||
8118 | goto Next_Primitive; | |
8119 | end if; | |
8120 | ||
8121 | Next_Elmt (Op_Elmt_2); | |
8122 | end loop; | |
8123 | end if; | |
8124 | ||
8125 | <<Next_Primitive>> | |
8126 | Next_Elmt (Op_Elmt); | |
8127 | end loop; | |
8128 | end Handle_Inherited_Private_Subprograms; | |
8129 | ||
343d35dc | 8130 | -------------------- |
8131 | -- Set_Fixed_Prim -- | |
8132 | -------------------- | |
ee6ba406 | 8133 | |
343d35dc | 8134 | procedure Set_Fixed_Prim (Pos : Nat) is |
ee6ba406 | 8135 | begin |
9e7de1e1 | 8136 | pragma Assert (Pos <= Count_Prim); |
343d35dc | 8137 | Fixed_Prim (Pos) := True; |
8138 | exception | |
8139 | when Constraint_Error => | |
8140 | raise Program_Error; | |
8141 | end Set_Fixed_Prim; | |
ee6ba406 | 8142 | |
343d35dc | 8143 | begin |
725a69d2 | 8144 | -- In case of nested packages and public child package it may be |
8145 | -- necessary a special management on inherited subprograms so that | |
8146 | -- the dispatch table is properly filled. | |
8147 | ||
8148 | if Ekind (Scope (Scope (Typ))) = E_Package | |
8149 | and then Scope (Scope (Typ)) /= Standard_Standard | |
8150 | and then ((Is_Derived_Type (Typ) and then not Is_Private_Type (Typ)) | |
8151 | or else | |
8152 | (Nkind (Parent (Typ)) = N_Private_Extension_Declaration | |
8153 | and then Is_Generic_Type (Typ))) | |
8154 | and then In_Open_Scopes (Scope (Etype (Typ))) | |
5b990e08 | 8155 | and then Is_Base_Type (Typ) |
725a69d2 | 8156 | then |
8157 | Handle_Inherited_Private_Subprograms (Typ); | |
8158 | end if; | |
8159 | ||
343d35dc | 8160 | -- Second stage: Register fixed entries |
ee6ba406 | 8161 | |
343d35dc | 8162 | Nb_Prim := 0; |
8163 | Prim_Elmt := First_Prim; | |
8164 | while Present (Prim_Elmt) loop | |
8165 | Prim := Node (Prim_Elmt); | |
ee6ba406 | 8166 | |
343d35dc | 8167 | -- Predefined primitives have a separate table and all its |
8168 | -- entries are at predefined fixed positions. | |
ee6ba406 | 8169 | |
cf365b48 | 8170 | if In_Predef_Prims_DT (Prim) then |
8171 | if Is_Predefined_Dispatching_Operation (Prim) then | |
8172 | Set_DT_Position (Prim, Default_Prim_Op_Position (Prim)); | |
ee6ba406 | 8173 | |
cf365b48 | 8174 | else pragma Assert (Present (Alias (Prim))); |
8175 | Set_DT_Position (Prim, | |
8176 | Default_Prim_Op_Position (Ultimate_Alias (Prim))); | |
8177 | end if; | |
d62940bf | 8178 | |
343d35dc | 8179 | -- Overriding primitives of ancestor abstract interfaces |
ee6ba406 | 8180 | |
a652dd51 | 8181 | elsif Present (Interface_Alias (Prim)) |
8182 | and then Is_Ancestor | |
cb4af01d | 8183 | (Find_Dispatching_Type (Interface_Alias (Prim)), Typ, |
8184 | Use_Full_View => True) | |
343d35dc | 8185 | then |
8186 | pragma Assert (DT_Position (Prim) = No_Uint | |
a652dd51 | 8187 | and then Present (DTC_Entity (Interface_Alias (Prim)))); |
ee6ba406 | 8188 | |
a652dd51 | 8189 | E := Interface_Alias (Prim); |
343d35dc | 8190 | Set_DT_Position (Prim, DT_Position (E)); |
aad6babd | 8191 | |
343d35dc | 8192 | pragma Assert |
8193 | (DT_Position (Alias (Prim)) = No_Uint | |
8194 | or else DT_Position (Alias (Prim)) = DT_Position (E)); | |
8195 | Set_DT_Position (Alias (Prim), DT_Position (E)); | |
8196 | Set_Fixed_Prim (UI_To_Int (DT_Position (Prim))); | |
af647dc7 | 8197 | |
343d35dc | 8198 | -- Overriding primitives must use the same entry as the |
36b938a3 | 8199 | -- overridden primitive. |
af647dc7 | 8200 | |
a652dd51 | 8201 | elsif not Present (Interface_Alias (Prim)) |
343d35dc | 8202 | and then Present (Alias (Prim)) |
17e14451 | 8203 | and then Chars (Prim) = Chars (Alias (Prim)) |
343d35dc | 8204 | and then Find_Dispatching_Type (Alias (Prim)) /= Typ |
a652dd51 | 8205 | and then Is_Ancestor |
cb4af01d | 8206 | (Find_Dispatching_Type (Alias (Prim)), Typ, |
8207 | Use_Full_View => True) | |
343d35dc | 8208 | and then Present (DTC_Entity (Alias (Prim))) |
af647dc7 | 8209 | then |
343d35dc | 8210 | E := Alias (Prim); |
8211 | Set_DT_Position (Prim, DT_Position (E)); | |
aad6babd | 8212 | |
343d35dc | 8213 | if not Is_Predefined_Dispatching_Alias (E) then |
8214 | Set_Fixed_Prim (UI_To_Int (DT_Position (E))); | |
8215 | end if; | |
9dfe12ae | 8216 | end if; |
ee6ba406 | 8217 | |
aad6babd | 8218 | Next_Elmt (Prim_Elmt); |
8219 | end loop; | |
8220 | ||
b381b314 | 8221 | -- Third stage: Fix the position of all the new primitives. |
343d35dc | 8222 | -- Entries associated with primitives covering interfaces |
8223 | -- are handled in a latter round. | |
aad6babd | 8224 | |
343d35dc | 8225 | Prim_Elmt := First_Prim; |
8226 | while Present (Prim_Elmt) loop | |
8227 | Prim := Node (Prim_Elmt); | |
aad6babd | 8228 | |
343d35dc | 8229 | -- Skip primitives previously set entries |
aad6babd | 8230 | |
343d35dc | 8231 | if DT_Position (Prim) /= No_Uint then |
8232 | null; | |
aad6babd | 8233 | |
343d35dc | 8234 | -- Primitives covering interface primitives are handled later |
aad6babd | 8235 | |
a652dd51 | 8236 | elsif Present (Interface_Alias (Prim)) then |
343d35dc | 8237 | null; |
aad6babd | 8238 | |
343d35dc | 8239 | else |
8240 | -- Take the next available position in the DT | |
aad6babd | 8241 | |
343d35dc | 8242 | loop |
8243 | Nb_Prim := Nb_Prim + 1; | |
8244 | pragma Assert (Nb_Prim <= Count_Prim); | |
8245 | exit when not Fixed_Prim (Nb_Prim); | |
8246 | end loop; | |
aad6babd | 8247 | |
343d35dc | 8248 | Set_DT_Position (Prim, UI_From_Int (Nb_Prim)); |
8249 | Set_Fixed_Prim (Nb_Prim); | |
8250 | end if; | |
aad6babd | 8251 | |
343d35dc | 8252 | Next_Elmt (Prim_Elmt); |
8253 | end loop; | |
8254 | end; | |
aad6babd | 8255 | |
343d35dc | 8256 | -- Fourth stage: Complete the decoration of primitives covering |
8257 | -- interfaces (that is, propagate the DT_Position attribute | |
8258 | -- from the aliased primitive) | |
aad6babd | 8259 | |
343d35dc | 8260 | Prim_Elmt := First_Prim; |
8261 | while Present (Prim_Elmt) loop | |
8262 | Prim := Node (Prim_Elmt); | |
aad6babd | 8263 | |
343d35dc | 8264 | if DT_Position (Prim) = No_Uint |
a652dd51 | 8265 | and then Present (Interface_Alias (Prim)) |
343d35dc | 8266 | then |
8267 | pragma Assert (Present (Alias (Prim)) | |
8268 | and then Find_Dispatching_Type (Alias (Prim)) = Typ); | |
aad6babd | 8269 | |
343d35dc | 8270 | -- Check if this entry will be placed in the primary DT |
aad6babd | 8271 | |
a652dd51 | 8272 | if Is_Ancestor |
cb4af01d | 8273 | (Find_Dispatching_Type (Interface_Alias (Prim)), Typ, |
8274 | Use_Full_View => True) | |
ee6ba406 | 8275 | then |
343d35dc | 8276 | pragma Assert (DT_Position (Alias (Prim)) /= No_Uint); |
8277 | Set_DT_Position (Prim, DT_Position (Alias (Prim))); | |
aad6babd | 8278 | |
343d35dc | 8279 | -- Otherwise it will be placed in the secondary DT |
aad6babd | 8280 | |
343d35dc | 8281 | else |
8282 | pragma Assert | |
a652dd51 | 8283 | (DT_Position (Interface_Alias (Prim)) /= No_Uint); |
343d35dc | 8284 | Set_DT_Position (Prim, |
a652dd51 | 8285 | DT_Position (Interface_Alias (Prim))); |
aad6babd | 8286 | end if; |
343d35dc | 8287 | end if; |
aad6babd | 8288 | |
343d35dc | 8289 | Next_Elmt (Prim_Elmt); |
8290 | end loop; | |
d62940bf | 8291 | |
343d35dc | 8292 | -- Generate listing showing the contents of the dispatch tables. |
8293 | -- This action is done before some further static checks because | |
8294 | -- in case of critical errors caused by a wrong dispatch table | |
8295 | -- we need to see the contents of such table. | |
d62940bf | 8296 | |
343d35dc | 8297 | if Debug_Flag_ZZ then |
8298 | Write_DT (Typ); | |
8299 | end if; | |
aad6babd | 8300 | |
343d35dc | 8301 | -- Final stage: Ensure that the table is correct plus some further |
8302 | -- verifications concerning the primitives. | |
aad6babd | 8303 | |
343d35dc | 8304 | Prim_Elmt := First_Prim; |
8305 | DT_Length := 0; | |
8306 | while Present (Prim_Elmt) loop | |
8307 | Prim := Node (Prim_Elmt); | |
aad6babd | 8308 | |
343d35dc | 8309 | -- At this point all the primitives MUST have a position |
acf97c11 | 8310 | -- in the dispatch table. |
aad6babd | 8311 | |
343d35dc | 8312 | if DT_Position (Prim) = No_Uint then |
8313 | raise Program_Error; | |
8314 | end if; | |
aad6babd | 8315 | |
343d35dc | 8316 | -- Calculate real size of the dispatch table |
aad6babd | 8317 | |
cf365b48 | 8318 | if not In_Predef_Prims_DT (Prim) |
343d35dc | 8319 | and then UI_To_Int (DT_Position (Prim)) > DT_Length |
8320 | then | |
8321 | DT_Length := UI_To_Int (DT_Position (Prim)); | |
8322 | end if; | |
aad6babd | 8323 | |
36b938a3 | 8324 | -- Ensure that the assigned position to non-predefined |
343d35dc | 8325 | -- dispatching operations in the dispatch table is correct. |
aad6babd | 8326 | |
cf365b48 | 8327 | if not Is_Predefined_Dispatching_Operation (Prim) |
8328 | and then not Is_Predefined_Dispatching_Alias (Prim) | |
343d35dc | 8329 | then |
8330 | Validate_Position (Prim); | |
8331 | end if; | |
ee6ba406 | 8332 | |
343d35dc | 8333 | if Chars (Prim) = Name_Finalize then |
8334 | Finalized := True; | |
8335 | end if; | |
ee6ba406 | 8336 | |
343d35dc | 8337 | if Chars (Prim) = Name_Adjust then |
8338 | Adjusted := True; | |
8339 | end if; | |
af647dc7 | 8340 | |
503f7fd3 | 8341 | -- An abstract operation cannot be declared in the private part for a |
8342 | -- visible abstract type, because it can't be overridden outside this | |
8343 | -- package hierarchy. For explicit declarations this is checked at | |
8344 | -- the point of declaration, but for inherited operations it must be | |
8345 | -- done when building the dispatch table. | |
343d35dc | 8346 | |
a652dd51 | 8347 | -- Ada 2005 (AI-251): Primitives associated with interfaces are |
8348 | -- excluded from this check because interfaces must be visible in | |
8349 | -- the public and private part (RM 7.3 (7.3/2)) | |
343d35dc | 8350 | |
6fb3c314 | 8351 | -- We disable this check in CodePeer mode, to accommodate legacy |
6da4d289 | 8352 | -- Ada code. |
8353 | ||
8354 | if not CodePeer_Mode | |
8355 | and then Is_Abstract_Type (Typ) | |
343d35dc | 8356 | and then Is_Abstract_Subprogram (Prim) |
8357 | and then Present (Alias (Prim)) | |
a652dd51 | 8358 | and then not Is_Interface |
8359 | (Find_Dispatching_Type (Ultimate_Alias (Prim))) | |
8360 | and then not Present (Interface_Alias (Prim)) | |
343d35dc | 8361 | and then Is_Derived_Type (Typ) |
8362 | and then In_Private_Part (Current_Scope) | |
8363 | and then | |
8364 | List_Containing (Parent (Prim)) = | |
8365 | Private_Declarations | |
8366 | (Specification (Unit_Declaration_Node (Current_Scope))) | |
8367 | and then Original_View_In_Visible_Part (Typ) | |
8368 | then | |
8369 | -- We exclude Input and Output stream operations because | |
8370 | -- Limited_Controlled inherits useless Input and Output | |
8371 | -- stream operations from Root_Controlled, which can | |
8372 | -- never be overridden. | |
ee6ba406 | 8373 | |
343d35dc | 8374 | if not Is_TSS (Prim, TSS_Stream_Input) |
8375 | and then | |
8376 | not Is_TSS (Prim, TSS_Stream_Output) | |
ee6ba406 | 8377 | then |
503f7fd3 | 8378 | Error_Msg_NE |
343d35dc | 8379 | ("abstract inherited private operation&" & |
17e14451 | 8380 | " must be overridden (RM 3.9.3(10))", |
343d35dc | 8381 | Parent (Typ), Prim); |
ee6ba406 | 8382 | end if; |
343d35dc | 8383 | end if; |
aad6babd | 8384 | |
343d35dc | 8385 | Next_Elmt (Prim_Elmt); |
8386 | end loop; | |
ee6ba406 | 8387 | |
343d35dc | 8388 | -- Additional check |
aad6babd | 8389 | |
343d35dc | 8390 | if Is_Controlled (Typ) then |
8391 | if not Finalized then | |
503f7fd3 | 8392 | Error_Msg_N |
343d35dc | 8393 | ("controlled type has no explicit Finalize method?", Typ); |
ee6ba406 | 8394 | |
343d35dc | 8395 | elsif not Adjusted then |
503f7fd3 | 8396 | Error_Msg_N |
343d35dc | 8397 | ("controlled type has no explicit Adjust method?", Typ); |
ee6ba406 | 8398 | end if; |
343d35dc | 8399 | end if; |
ee6ba406 | 8400 | |
343d35dc | 8401 | -- Set the final size of the Dispatch Table |
aad6babd | 8402 | |
343d35dc | 8403 | Set_DT_Entry_Count (The_Tag, UI_From_Int (DT_Length)); |
ee6ba406 | 8404 | |
725a69d2 | 8405 | -- The derived type must have at least as many components as its parent |
acf97c11 | 8406 | -- (for root types Etype points to itself and the test cannot fail). |
aad6babd | 8407 | |
725a69d2 | 8408 | if DT_Entry_Count (The_Tag) < |
8409 | DT_Entry_Count (First_Tag_Component (Parent_Typ)) | |
8410 | then | |
8411 | raise Program_Error; | |
aad6babd | 8412 | end if; |
ee6ba406 | 8413 | end Set_All_DT_Position; |
8414 | ||
294b942d | 8415 | -------------------------- |
8416 | -- Set_CPP_Constructors -- | |
8417 | -------------------------- | |
ee6ba406 | 8418 | |
294b942d | 8419 | procedure Set_CPP_Constructors (Typ : Entity_Id) is |
d00681a7 | 8420 | |
8421 | procedure Set_CPP_Constructors_Old (Typ : Entity_Id); | |
8422 | -- For backward compatibility this routine handles CPP constructors | |
8423 | -- of non-tagged types. | |
8424 | ||
8425 | procedure Set_CPP_Constructors_Old (Typ : Entity_Id) is | |
8426 | Loc : Source_Ptr; | |
8427 | Init : Entity_Id; | |
8428 | E : Entity_Id; | |
8429 | Found : Boolean := False; | |
8430 | P : Node_Id; | |
8431 | Parms : List_Id; | |
8432 | ||
8433 | begin | |
8434 | -- Look for the constructor entities | |
8435 | ||
8436 | E := Next_Entity (Typ); | |
8437 | while Present (E) loop | |
8438 | if Ekind (E) = E_Function | |
8439 | and then Is_Constructor (E) | |
8440 | then | |
8441 | -- Create the init procedure | |
8442 | ||
8443 | Found := True; | |
8444 | Loc := Sloc (E); | |
8445 | Init := Make_Defining_Identifier (Loc, | |
8446 | Make_Init_Proc_Name (Typ)); | |
8447 | Parms := | |
8448 | New_List ( | |
8449 | Make_Parameter_Specification (Loc, | |
8450 | Defining_Identifier => | |
8451 | Make_Defining_Identifier (Loc, Name_X), | |
8452 | Parameter_Type => | |
8453 | New_Reference_To (Typ, Loc))); | |
8454 | ||
8455 | if Present (Parameter_Specifications (Parent (E))) then | |
8456 | P := First (Parameter_Specifications (Parent (E))); | |
8457 | while Present (P) loop | |
8458 | Append_To (Parms, | |
8459 | Make_Parameter_Specification (Loc, | |
8460 | Defining_Identifier => | |
8461 | Make_Defining_Identifier (Loc, | |
8462 | Chars (Defining_Identifier (P))), | |
8463 | Parameter_Type => | |
8464 | New_Copy_Tree (Parameter_Type (P)))); | |
8465 | Next (P); | |
8466 | end loop; | |
8467 | end if; | |
8468 | ||
8469 | Discard_Node ( | |
8470 | Make_Subprogram_Declaration (Loc, | |
8471 | Make_Procedure_Specification (Loc, | |
8472 | Defining_Unit_Name => Init, | |
8473 | Parameter_Specifications => Parms))); | |
8474 | ||
8475 | Set_Init_Proc (Typ, Init); | |
8476 | Set_Is_Imported (Init); | |
265200d0 | 8477 | Set_Is_Constructor (Init); |
d00681a7 | 8478 | Set_Interface_Name (Init, Interface_Name (E)); |
265200d0 | 8479 | Set_Convention (Init, Convention_CPP); |
d00681a7 | 8480 | Set_Is_Public (Init); |
8481 | Set_Has_Completion (Init); | |
8482 | end if; | |
8483 | ||
8484 | Next_Entity (E); | |
8485 | end loop; | |
8486 | ||
8487 | -- If there are no constructors, mark the type as abstract since we | |
8488 | -- won't be able to declare objects of that type. | |
8489 | ||
8490 | if not Found then | |
8491 | Set_Is_Abstract_Type (Typ); | |
8492 | end if; | |
8493 | end Set_CPP_Constructors_Old; | |
8494 | ||
8495 | -- Local variables | |
8496 | ||
ee6ba406 | 8497 | Loc : Source_Ptr; |
ee6ba406 | 8498 | E : Entity_Id; |
294b942d | 8499 | Found : Boolean := False; |
8500 | P : Node_Id; | |
8501 | Parms : List_Id; | |
ee6ba406 | 8502 | |
d00681a7 | 8503 | Constructor_Decl_Node : Node_Id; |
8504 | Constructor_Id : Entity_Id; | |
8505 | Wrapper_Id : Entity_Id; | |
8506 | Wrapper_Body_Node : Node_Id; | |
8507 | Actuals : List_Id; | |
8508 | Body_Stmts : List_Id; | |
8509 | Init_Tags_List : List_Id; | |
8510 | ||
ee6ba406 | 8511 | begin |
d00681a7 | 8512 | pragma Assert (Is_CPP_Class (Typ)); |
8513 | ||
8514 | -- For backward compatibility the compiler accepts C++ classes | |
8515 | -- imported through non-tagged record types. In such case the | |
8516 | -- wrapper of the C++ constructor is useless because the _tag | |
8517 | -- component is not available. | |
8518 | ||
8519 | -- Example: | |
8520 | -- type Root is limited record ... | |
8521 | -- pragma Import (CPP, Root); | |
8522 | -- function New_Root return Root; | |
8523 | -- pragma CPP_Constructor (New_Root, ... ); | |
8524 | ||
8525 | if not Is_Tagged_Type (Typ) then | |
8526 | Set_CPP_Constructors_Old (Typ); | |
8527 | return; | |
8528 | end if; | |
8529 | ||
294b942d | 8530 | -- Look for the constructor entities |
ee6ba406 | 8531 | |
8532 | E := Next_Entity (Typ); | |
294b942d | 8533 | while Present (E) loop |
8534 | if Ekind (E) = E_Function | |
8535 | and then Is_Constructor (E) | |
8536 | then | |
294b942d | 8537 | Found := True; |
8538 | Loc := Sloc (E); | |
d00681a7 | 8539 | |
8540 | -- Generate the declaration of the imported C++ constructor | |
8541 | ||
294b942d | 8542 | Parms := |
8543 | New_List ( | |
8544 | Make_Parameter_Specification (Loc, | |
8545 | Defining_Identifier => | |
d00681a7 | 8546 | Make_Defining_Identifier (Loc, Name_uInit), |
294b942d | 8547 | Parameter_Type => |
8548 | New_Reference_To (Typ, Loc))); | |
8549 | ||
8550 | if Present (Parameter_Specifications (Parent (E))) then | |
8551 | P := First (Parameter_Specifications (Parent (E))); | |
8552 | while Present (P) loop | |
8553 | Append_To (Parms, | |
8554 | Make_Parameter_Specification (Loc, | |
8555 | Defining_Identifier => | |
8556 | Make_Defining_Identifier (Loc, | |
8557 | Chars (Defining_Identifier (P))), | |
8558 | Parameter_Type => New_Copy_Tree (Parameter_Type (P)))); | |
8559 | Next (P); | |
8560 | end loop; | |
8561 | end if; | |
8562 | ||
d00681a7 | 8563 | Constructor_Id := Make_Temporary (Loc, 'P'); |
8564 | ||
8565 | Constructor_Decl_Node := | |
294b942d | 8566 | Make_Subprogram_Declaration (Loc, |
8567 | Make_Procedure_Specification (Loc, | |
d00681a7 | 8568 | Defining_Unit_Name => Constructor_Id, |
8569 | Parameter_Specifications => Parms)); | |
8570 | ||
8571 | Set_Is_Imported (Constructor_Id); | |
265200d0 | 8572 | Set_Is_Constructor (Constructor_Id); |
d00681a7 | 8573 | Set_Interface_Name (Constructor_Id, Interface_Name (E)); |
265200d0 | 8574 | Set_Convention (Constructor_Id, Convention_CPP); |
d00681a7 | 8575 | Set_Is_Public (Constructor_Id); |
8576 | Set_Has_Completion (Constructor_Id); | |
8577 | ||
8578 | -- Build the wrapper of this constructor | |
8579 | ||
8580 | Parms := | |
8581 | New_List ( | |
8582 | Make_Parameter_Specification (Loc, | |
8583 | Defining_Identifier => | |
8584 | Make_Defining_Identifier (Loc, Name_uInit), | |
8585 | Parameter_Type => | |
8586 | New_Reference_To (Typ, Loc))); | |
8587 | ||
8588 | if Present (Parameter_Specifications (Parent (E))) then | |
8589 | P := First (Parameter_Specifications (Parent (E))); | |
8590 | while Present (P) loop | |
8591 | Append_To (Parms, | |
8592 | Make_Parameter_Specification (Loc, | |
8593 | Defining_Identifier => | |
8594 | Make_Defining_Identifier (Loc, | |
8595 | Chars (Defining_Identifier (P))), | |
8596 | Parameter_Type => New_Copy_Tree (Parameter_Type (P)))); | |
8597 | Next (P); | |
8598 | end loop; | |
8599 | end if; | |
8600 | ||
8601 | Body_Stmts := New_List; | |
8602 | ||
8603 | -- Invoke the C++ constructor | |
8604 | ||
8605 | Actuals := New_List; | |
8606 | ||
8607 | P := First (Parms); | |
8608 | while Present (P) loop | |
8609 | Append_To (Actuals, | |
8610 | New_Reference_To (Defining_Identifier (P), Loc)); | |
8611 | Next (P); | |
8612 | end loop; | |
8613 | ||
8614 | Append_To (Body_Stmts, | |
8615 | Make_Procedure_Call_Statement (Loc, | |
8616 | Name => New_Reference_To (Constructor_Id, Loc), | |
8617 | Parameter_Associations => Actuals)); | |
8618 | ||
8619 | -- Initialize copies of C++ primary and secondary tags | |
8620 | ||
8621 | Init_Tags_List := New_List; | |
8622 | ||
8623 | declare | |
8624 | Tag_Elmt : Elmt_Id; | |
8625 | Tag_Comp : Node_Id; | |
8626 | ||
8627 | begin | |
8628 | Tag_Elmt := First_Elmt (Access_Disp_Table (Typ)); | |
8629 | Tag_Comp := First_Tag_Component (Typ); | |
8630 | ||
8631 | while Present (Tag_Elmt) | |
8632 | and then Is_Tag (Node (Tag_Elmt)) | |
8633 | loop | |
8634 | -- Skip the following assertion with primary tags because | |
8635 | -- Related_Type is not set on primary tag components | |
8636 | ||
8637 | pragma Assert (Tag_Comp = First_Tag_Component (Typ) | |
8638 | or else Related_Type (Node (Tag_Elmt)) | |
8639 | = Related_Type (Tag_Comp)); | |
8640 | ||
8641 | Append_To (Init_Tags_List, | |
8642 | Make_Assignment_Statement (Loc, | |
8643 | Name => | |
8644 | New_Reference_To (Node (Tag_Elmt), Loc), | |
8645 | Expression => | |
8646 | Make_Selected_Component (Loc, | |
55868293 | 8647 | Prefix => |
8648 | Make_Identifier (Loc, Name_uInit), | |
d00681a7 | 8649 | Selector_Name => |
8650 | New_Reference_To (Tag_Comp, Loc)))); | |
8651 | ||
8652 | Tag_Comp := Next_Tag_Component (Tag_Comp); | |
8653 | Next_Elmt (Tag_Elmt); | |
8654 | end loop; | |
8655 | end; | |
8656 | ||
8657 | Append_To (Body_Stmts, | |
8658 | Make_If_Statement (Loc, | |
8659 | Condition => | |
8660 | Make_Op_Eq (Loc, | |
8661 | Left_Opnd => | |
8662 | New_Reference_To | |
8663 | (Node (First_Elmt (Access_Disp_Table (Typ))), | |
8664 | Loc), | |
8665 | Right_Opnd => | |
8666 | Unchecked_Convert_To (RTE (RE_Tag), | |
8667 | New_Reference_To (RTE (RE_Null_Address), Loc))), | |
8668 | Then_Statements => Init_Tags_List)); | |
8669 | ||
8670 | Wrapper_Id := Make_Defining_Identifier (Loc, | |
8671 | Make_Init_Proc_Name (Typ)); | |
8672 | ||
8673 | Wrapper_Body_Node := | |
8674 | Make_Subprogram_Body (Loc, | |
8675 | Specification => | |
8676 | Make_Procedure_Specification (Loc, | |
8677 | Defining_Unit_Name => Wrapper_Id, | |
8678 | Parameter_Specifications => Parms), | |
8679 | Declarations => New_List (Constructor_Decl_Node), | |
8680 | Handled_Statement_Sequence => | |
8681 | Make_Handled_Sequence_Of_Statements (Loc, | |
8682 | Statements => Body_Stmts, | |
8683 | Exception_Handlers => No_List)); | |
8684 | ||
8685 | Discard_Node (Wrapper_Body_Node); | |
8686 | Set_Init_Proc (Typ, Wrapper_Id); | |
294b942d | 8687 | end if; |
8688 | ||
ee6ba406 | 8689 | Next_Entity (E); |
8690 | end loop; | |
8691 | ||
9dfe12ae | 8692 | -- If there are no constructors, mark the type as abstract since we |
ee6ba406 | 8693 | -- won't be able to declare objects of that type. |
8694 | ||
294b942d | 8695 | if not Found then |
343d35dc | 8696 | Set_Is_Abstract_Type (Typ); |
ee6ba406 | 8697 | end if; |
d00681a7 | 8698 | |
8699 | -- If the CPP type has constructors then it must import also the default | |
8700 | -- C++ constructor. It is required for default initialization of objects | |
8701 | -- of the type. It is also required to elaborate objects of Ada types | |
8702 | -- that are defined as derivations of this CPP type. | |
8703 | ||
8704 | if Has_CPP_Constructors (Typ) | |
8705 | and then No (Init_Proc (Typ)) | |
8706 | then | |
8707 | Error_Msg_N ("?default constructor must be imported from C++", Typ); | |
8708 | end if; | |
294b942d | 8709 | end Set_CPP_Constructors; |
ee6ba406 | 8710 | |
725a69d2 | 8711 | -------------------------- |
8712 | -- Set_DTC_Entity_Value -- | |
8713 | -------------------------- | |
8714 | ||
8715 | procedure Set_DTC_Entity_Value | |
8716 | (Tagged_Type : Entity_Id; | |
8717 | Prim : Entity_Id) | |
8718 | is | |
8719 | begin | |
a652dd51 | 8720 | if Present (Interface_Alias (Prim)) |
725a69d2 | 8721 | and then Is_Interface |
a652dd51 | 8722 | (Find_Dispatching_Type (Interface_Alias (Prim))) |
725a69d2 | 8723 | then |
8724 | Set_DTC_Entity (Prim, | |
8725 | Find_Interface_Tag | |
8726 | (T => Tagged_Type, | |
a652dd51 | 8727 | Iface => Find_Dispatching_Type (Interface_Alias (Prim)))); |
725a69d2 | 8728 | else |
8729 | Set_DTC_Entity (Prim, | |
8730 | First_Tag_Component (Tagged_Type)); | |
8731 | end if; | |
8732 | end Set_DTC_Entity_Value; | |
8733 | ||
952af0b9 | 8734 | ----------------- |
8735 | -- Tagged_Kind -- | |
8736 | ----------------- | |
8737 | ||
8738 | function Tagged_Kind (T : Entity_Id) return Node_Id is | |
8739 | Conc_Typ : Entity_Id; | |
8740 | Loc : constant Source_Ptr := Sloc (T); | |
8741 | ||
8742 | begin | |
68f95949 | 8743 | pragma Assert |
8744 | (Is_Tagged_Type (T) and then RTE_Available (RE_Tagged_Kind)); | |
952af0b9 | 8745 | |
8746 | -- Abstract kinds | |
8747 | ||
343d35dc | 8748 | if Is_Abstract_Type (T) then |
952af0b9 | 8749 | if Is_Limited_Record (T) then |
8750 | return New_Reference_To (RTE (RE_TK_Abstract_Limited_Tagged), Loc); | |
8751 | else | |
8752 | return New_Reference_To (RTE (RE_TK_Abstract_Tagged), Loc); | |
8753 | end if; | |
8754 | ||
8755 | -- Concurrent kinds | |
8756 | ||
8757 | elsif Is_Concurrent_Record_Type (T) then | |
8758 | Conc_Typ := Corresponding_Concurrent_Type (T); | |
8759 | ||
17e14451 | 8760 | if Present (Full_View (Conc_Typ)) then |
8761 | Conc_Typ := Full_View (Conc_Typ); | |
8762 | end if; | |
8763 | ||
952af0b9 | 8764 | if Ekind (Conc_Typ) = E_Protected_Type then |
8765 | return New_Reference_To (RTE (RE_TK_Protected), Loc); | |
8766 | else | |
8767 | pragma Assert (Ekind (Conc_Typ) = E_Task_Type); | |
8768 | return New_Reference_To (RTE (RE_TK_Task), Loc); | |
8769 | end if; | |
8770 | ||
8771 | -- Regular tagged kinds | |
8772 | ||
8773 | else | |
8774 | if Is_Limited_Record (T) then | |
8775 | return New_Reference_To (RTE (RE_TK_Limited_Tagged), Loc); | |
8776 | else | |
8777 | return New_Reference_To (RTE (RE_TK_Tagged), Loc); | |
8778 | end if; | |
8779 | end if; | |
8780 | end Tagged_Kind; | |
8781 | ||
aad6babd | 8782 | -------------- |
8783 | -- Write_DT -- | |
8784 | -------------- | |
8785 | ||
8786 | procedure Write_DT (Typ : Entity_Id) is | |
8787 | Elmt : Elmt_Id; | |
8788 | Prim : Node_Id; | |
8789 | ||
8790 | begin | |
8791 | -- Protect this procedure against wrong usage. Required because it will | |
8792 | -- be used directly from GDB | |
8793 | ||
17e14451 | 8794 | if not (Typ <= Last_Node_Id) |
aad6babd | 8795 | or else not Is_Tagged_Type (Typ) |
8796 | then | |
d62940bf | 8797 | Write_Str ("wrong usage: Write_DT must be used with tagged types"); |
aad6babd | 8798 | Write_Eol; |
8799 | return; | |
8800 | end if; | |
8801 | ||
8802 | Write_Int (Int (Typ)); | |
8803 | Write_Str (": "); | |
8804 | Write_Name (Chars (Typ)); | |
8805 | ||
8806 | if Is_Interface (Typ) then | |
8807 | Write_Str (" is interface"); | |
8808 | end if; | |
8809 | ||
8810 | Write_Eol; | |
8811 | ||
8812 | Elmt := First_Elmt (Primitive_Operations (Typ)); | |
8813 | while Present (Elmt) loop | |
8814 | Prim := Node (Elmt); | |
8815 | Write_Str (" - "); | |
8816 | ||
8817 | -- Indicate if this primitive will be allocated in the primary | |
8818 | -- dispatch table or in a secondary dispatch table associated | |
8819 | -- with an abstract interface type | |
8820 | ||
8821 | if Present (DTC_Entity (Prim)) then | |
8822 | if Etype (DTC_Entity (Prim)) = RTE (RE_Tag) then | |
8823 | Write_Str ("[P] "); | |
8824 | else | |
8825 | Write_Str ("[s] "); | |
8826 | end if; | |
8827 | end if; | |
8828 | ||
8829 | -- Output the node of this primitive operation and its name | |
8830 | ||
8831 | Write_Int (Int (Prim)); | |
8832 | Write_Str (": "); | |
68f95949 | 8833 | |
8834 | if Is_Predefined_Dispatching_Operation (Prim) then | |
8835 | Write_Str ("(predefined) "); | |
8836 | end if; | |
8837 | ||
b381b314 | 8838 | -- Prefix the name of the primitive with its corresponding tagged |
8839 | -- type to facilitate seeing inherited primitives. | |
8840 | ||
8841 | if Present (Alias (Prim)) then | |
8842 | Write_Name | |
8843 | (Chars (Find_Dispatching_Type (Ultimate_Alias (Prim)))); | |
8844 | else | |
8845 | Write_Name (Chars (Typ)); | |
8846 | end if; | |
8847 | ||
8848 | Write_Str ("."); | |
aad6babd | 8849 | Write_Name (Chars (Prim)); |
8850 | ||
8851 | -- Indicate if this primitive has an aliased primitive | |
8852 | ||
8853 | if Present (Alias (Prim)) then | |
8854 | Write_Str (" (alias = "); | |
8855 | Write_Int (Int (Alias (Prim))); | |
8856 | ||
8857 | -- If the DTC_Entity attribute is already set we can also output | |
4c58ddd7 | 8858 | -- the name of the interface covered by this primitive (if any). |
aad6babd | 8859 | |
8860 | if Present (DTC_Entity (Alias (Prim))) | |
8861 | and then Is_Interface (Scope (DTC_Entity (Alias (Prim)))) | |
8862 | then | |
8863 | Write_Str (" from interface "); | |
8864 | Write_Name (Chars (Scope (DTC_Entity (Alias (Prim))))); | |
8865 | end if; | |
8866 | ||
a652dd51 | 8867 | if Present (Interface_Alias (Prim)) then |
aad6babd | 8868 | Write_Str (", AI_Alias of "); |
f235fede | 8869 | |
8870 | if Is_Null_Interface_Primitive (Interface_Alias (Prim)) then | |
8871 | Write_Str ("null primitive "); | |
8872 | end if; | |
8873 | ||
a652dd51 | 8874 | Write_Name |
8875 | (Chars (Find_Dispatching_Type (Interface_Alias (Prim)))); | |
aad6babd | 8876 | Write_Char (':'); |
a652dd51 | 8877 | Write_Int (Int (Interface_Alias (Prim))); |
aad6babd | 8878 | end if; |
8879 | ||
8880 | Write_Str (")"); | |
8881 | end if; | |
8882 | ||
8883 | -- Display the final position of this primitive in its associated | |
8884 | -- (primary or secondary) dispatch table | |
8885 | ||
8886 | if Present (DTC_Entity (Prim)) | |
8887 | and then DT_Position (Prim) /= No_Uint | |
8888 | then | |
8889 | Write_Str (" at #"); | |
8890 | Write_Int (UI_To_Int (DT_Position (Prim))); | |
8891 | end if; | |
8892 | ||
343d35dc | 8893 | if Is_Abstract_Subprogram (Prim) then |
aad6babd | 8894 | Write_Str (" is abstract;"); |
af647dc7 | 8895 | |
8896 | -- Check if this is a null primitive | |
8897 | ||
8898 | elsif Comes_From_Source (Prim) | |
8899 | and then Ekind (Prim) = E_Procedure | |
8900 | and then Null_Present (Parent (Prim)) | |
8901 | then | |
8902 | Write_Str (" is null;"); | |
aad6babd | 8903 | end if; |
8904 | ||
555c63a6 | 8905 | if Is_Eliminated (Ultimate_Alias (Prim)) then |
8906 | Write_Str (" (eliminated)"); | |
8907 | end if; | |
8908 | ||
d00681a7 | 8909 | if Is_Imported (Prim) |
8910 | and then Convention (Prim) = Convention_CPP | |
8911 | then | |
8912 | Write_Str (" (C++)"); | |
8913 | end if; | |
8914 | ||
aad6babd | 8915 | Write_Eol; |
8916 | ||
8917 | Next_Elmt (Elmt); | |
8918 | end loop; | |
8919 | end Write_DT; | |
8920 | ||
ee6ba406 | 8921 | end Exp_Disp; |