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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 | -- -- | |
294b942d | 9 | -- Copyright (C) 1992-2009, 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; |
ee6ba406 | 33 | with Exp_Ch7; use Exp_Ch7; |
76a1c25b | 34 | with Exp_Dbug; use Exp_Dbug; |
ee6ba406 | 35 | with Exp_Tss; use Exp_Tss; |
36 | with Exp_Util; use Exp_Util; | |
af647dc7 | 37 | with Freeze; use Freeze; |
ee6ba406 | 38 | with Itypes; use Itypes; |
b6b96867 | 39 | with Layout; use Layout; |
ee6ba406 | 40 | with Nlists; use Nlists; |
41 | with Nmake; use Nmake; | |
aad6babd | 42 | with Namet; use Namet; |
ee6ba406 | 43 | with Opt; use Opt; |
aad6babd | 44 | with Output; use Output; |
68f95949 | 45 | with Restrict; use Restrict; |
46 | with Rident; use Rident; | |
ee6ba406 | 47 | with Rtsfind; use Rtsfind; |
aad6babd | 48 | with Sem; use Sem; |
d60c9ff7 | 49 | with Sem_Aux; use Sem_Aux; |
725a69d2 | 50 | with Sem_Ch6; use Sem_Ch6; |
acf97c11 | 51 | with Sem_Ch7; use Sem_Ch7; |
725a69d2 | 52 | with Sem_Ch8; use Sem_Ch8; |
ee6ba406 | 53 | with Sem_Disp; use Sem_Disp; |
725a69d2 | 54 | with Sem_Eval; use Sem_Eval; |
ee6ba406 | 55 | with Sem_Res; use Sem_Res; |
aad6babd | 56 | with Sem_Type; use Sem_Type; |
ee6ba406 | 57 | with Sem_Util; use Sem_Util; |
58 | with Sinfo; use Sinfo; | |
59 | with Snames; use Snames; | |
60 | with Stand; use Stand; | |
725a69d2 | 61 | with Stringt; use Stringt; |
ee6ba406 | 62 | with Tbuild; use Tbuild; |
63 | with Uintp; use Uintp; | |
64 | ||
65 | package body Exp_Disp is | |
66 | ||
725a69d2 | 67 | ----------------------- |
68 | -- Local Subprograms -- | |
69 | ----------------------- | |
ee6ba406 | 70 | |
68f95949 | 71 | function Default_Prim_Op_Position (E : Entity_Id) return Uint; |
aad6babd | 72 | -- Ada 2005 (AI-251): Returns the fixed position in the dispatch table |
73 | -- of the default primitive operations. | |
74 | ||
24971415 | 75 | function Has_DT (Typ : Entity_Id) return Boolean; |
76 | pragma Inline (Has_DT); | |
77 | -- Returns true if we generate a dispatch table for tagged type Typ | |
78 | ||
af647dc7 | 79 | function Is_Predefined_Dispatching_Alias (Prim : Entity_Id) return Boolean; |
80 | -- Returns true if Prim is not a predefined dispatching primitive but it is | |
36b938a3 | 81 | -- an alias of a predefined dispatching primitive (i.e. through a renaming) |
af647dc7 | 82 | |
cd534f03 | 83 | function New_Value (From : Node_Id) return Node_Id; |
84 | -- From is the original Expression. New_Value is equivalent to a call | |
85 | -- to Duplicate_Subexpr with an explicit dereference when From is an | |
86 | -- access parameter. | |
87 | ||
ee6ba406 | 88 | function Original_View_In_Visible_Part (Typ : Entity_Id) return Boolean; |
89 | -- Check if the type has a private view or if the public view appears | |
90 | -- in the visible part of a package spec. | |
91 | ||
d62940bf | 92 | function Prim_Op_Kind |
93 | (Prim : Entity_Id; | |
94 | Typ : Entity_Id) return Node_Id; | |
95 | -- Ada 2005 (AI-345): Determine the primitive operation kind of Prim | |
952af0b9 | 96 | -- according to its type Typ. Return a reference to an RE_Prim_Op_Kind |
d62940bf | 97 | -- enumeration value. |
aad6babd | 98 | |
952af0b9 | 99 | function Tagged_Kind (T : Entity_Id) return Node_Id; |
100 | -- Ada 2005 (AI-345): Determine the tagged kind of T and return a reference | |
101 | -- to an RE_Tagged_Kind enumeration value. | |
102 | ||
cd534f03 | 103 | ---------------------- |
104 | -- Apply_Tag_Checks -- | |
105 | ---------------------- | |
106 | ||
107 | procedure Apply_Tag_Checks (Call_Node : Node_Id) is | |
108 | Loc : constant Source_Ptr := Sloc (Call_Node); | |
109 | Ctrl_Arg : constant Node_Id := Controlling_Argument (Call_Node); | |
110 | Ctrl_Typ : constant Entity_Id := Base_Type (Etype (Ctrl_Arg)); | |
111 | Param_List : constant List_Id := Parameter_Associations (Call_Node); | |
112 | ||
113 | Subp : Entity_Id; | |
114 | CW_Typ : Entity_Id; | |
115 | Param : Node_Id; | |
116 | Typ : Entity_Id; | |
117 | Eq_Prim_Op : Entity_Id := Empty; | |
118 | ||
119 | begin | |
120 | if No_Run_Time_Mode then | |
121 | Error_Msg_CRT ("tagged types", Call_Node); | |
122 | return; | |
123 | end if; | |
124 | ||
125 | -- Apply_Tag_Checks is called directly from the semantics, so we need | |
126 | -- a check to see whether expansion is active before proceeding. In | |
127 | -- addition, there is no need to expand the call when compiling under | |
128 | -- restriction No_Dispatching_Calls; the semantic analyzer has | |
129 | -- previously notified the violation of this restriction. | |
130 | ||
131 | if not Expander_Active | |
132 | or else Restriction_Active (No_Dispatching_Calls) | |
133 | then | |
134 | return; | |
135 | end if; | |
136 | ||
137 | -- Set subprogram. If this is an inherited operation that was | |
138 | -- overridden, the body that is being called is its alias. | |
139 | ||
140 | Subp := Entity (Name (Call_Node)); | |
141 | ||
142 | if Present (Alias (Subp)) | |
143 | and then Is_Inherited_Operation (Subp) | |
144 | and then No (DTC_Entity (Subp)) | |
145 | then | |
146 | Subp := Alias (Subp); | |
147 | end if; | |
148 | ||
149 | -- Definition of the class-wide type and the tagged type | |
150 | ||
151 | -- If the controlling argument is itself a tag rather than a tagged | |
152 | -- object, then use the class-wide type associated with the subprogram's | |
153 | -- controlling type. This case can occur when a call to an inherited | |
154 | -- primitive has an actual that originated from a default parameter | |
155 | -- given by a tag-indeterminate call and when there is no other | |
156 | -- controlling argument providing the tag (AI-239 requires dispatching). | |
157 | -- This capability of dispatching directly by tag is also needed by the | |
158 | -- implementation of AI-260 (for the generic dispatching constructors). | |
159 | ||
160 | if Ctrl_Typ = RTE (RE_Tag) | |
161 | or else (RTE_Available (RE_Interface_Tag) | |
162 | and then Ctrl_Typ = RTE (RE_Interface_Tag)) | |
163 | then | |
164 | CW_Typ := Class_Wide_Type (Find_Dispatching_Type (Subp)); | |
165 | ||
166 | -- Class_Wide_Type is applied to the expressions used to initialize | |
167 | -- CW_Typ, to ensure that CW_Typ always denotes a class-wide type, since | |
168 | -- there are cases where the controlling type is resolved to a specific | |
169 | -- type (such as for designated types of arguments such as CW'Access). | |
170 | ||
171 | elsif Is_Access_Type (Ctrl_Typ) then | |
172 | CW_Typ := Class_Wide_Type (Designated_Type (Ctrl_Typ)); | |
173 | ||
174 | else | |
175 | CW_Typ := Class_Wide_Type (Ctrl_Typ); | |
176 | end if; | |
177 | ||
178 | Typ := Root_Type (CW_Typ); | |
179 | ||
180 | if Ekind (Typ) = E_Incomplete_Type then | |
181 | Typ := Non_Limited_View (Typ); | |
182 | end if; | |
183 | ||
184 | if not Is_Limited_Type (Typ) then | |
185 | Eq_Prim_Op := Find_Prim_Op (Typ, Name_Op_Eq); | |
186 | end if; | |
187 | ||
188 | -- Dispatching call to C++ primitive | |
189 | ||
190 | if Is_CPP_Class (Typ) then | |
191 | null; | |
192 | ||
193 | -- Dispatching call to Ada primitive | |
194 | ||
195 | elsif Present (Param_List) then | |
196 | ||
197 | -- Generate the Tag checks when appropriate | |
198 | ||
199 | Param := First_Actual (Call_Node); | |
200 | while Present (Param) loop | |
201 | ||
202 | -- No tag check with itself | |
203 | ||
204 | if Param = Ctrl_Arg then | |
205 | null; | |
206 | ||
207 | -- No tag check for parameter whose type is neither tagged nor | |
208 | -- access to tagged (for access parameters) | |
209 | ||
210 | elsif No (Find_Controlling_Arg (Param)) then | |
211 | null; | |
212 | ||
213 | -- No tag check for function dispatching on result if the | |
214 | -- Tag given by the context is this one | |
215 | ||
216 | elsif Find_Controlling_Arg (Param) = Ctrl_Arg then | |
217 | null; | |
218 | ||
219 | -- "=" is the only dispatching operation allowed to get | |
220 | -- operands with incompatible tags (it just returns false). | |
221 | -- We use Duplicate_Subexpr_Move_Checks instead of calling | |
222 | -- Relocate_Node because the value will be duplicated to | |
223 | -- check the tags. | |
224 | ||
225 | elsif Subp = Eq_Prim_Op then | |
226 | null; | |
227 | ||
228 | -- No check in presence of suppress flags | |
229 | ||
230 | elsif Tag_Checks_Suppressed (Etype (Param)) | |
231 | or else (Is_Access_Type (Etype (Param)) | |
232 | and then Tag_Checks_Suppressed | |
233 | (Designated_Type (Etype (Param)))) | |
234 | then | |
235 | null; | |
236 | ||
237 | -- Optimization: no tag checks if the parameters are identical | |
238 | ||
239 | elsif Is_Entity_Name (Param) | |
240 | and then Is_Entity_Name (Ctrl_Arg) | |
241 | and then Entity (Param) = Entity (Ctrl_Arg) | |
242 | then | |
243 | null; | |
244 | ||
245 | -- Now we need to generate the Tag check | |
246 | ||
247 | else | |
248 | -- Generate code for tag equality check | |
249 | -- Perhaps should have Checks.Apply_Tag_Equality_Check??? | |
250 | ||
251 | Insert_Action (Ctrl_Arg, | |
252 | Make_Implicit_If_Statement (Call_Node, | |
253 | Condition => | |
254 | Make_Op_Ne (Loc, | |
255 | Left_Opnd => | |
256 | Make_Selected_Component (Loc, | |
257 | Prefix => New_Value (Ctrl_Arg), | |
258 | Selector_Name => | |
259 | New_Reference_To | |
260 | (First_Tag_Component (Typ), Loc)), | |
261 | ||
262 | Right_Opnd => | |
263 | Make_Selected_Component (Loc, | |
264 | Prefix => | |
265 | Unchecked_Convert_To (Typ, New_Value (Param)), | |
266 | Selector_Name => | |
267 | New_Reference_To | |
268 | (First_Tag_Component (Typ), Loc))), | |
269 | ||
270 | Then_Statements => | |
271 | New_List (New_Constraint_Error (Loc)))); | |
272 | end if; | |
273 | ||
274 | Next_Actual (Param); | |
275 | end loop; | |
276 | end if; | |
277 | end Apply_Tag_Checks; | |
278 | ||
24971415 | 279 | ------------------------ |
280 | -- Building_Static_DT -- | |
281 | ------------------------ | |
282 | ||
283 | function Building_Static_DT (Typ : Entity_Id) return Boolean is | |
cc60bd16 | 284 | Root_Typ : Entity_Id := Root_Type (Typ); |
285 | ||
24971415 | 286 | begin |
cc60bd16 | 287 | -- Handle private types |
288 | ||
289 | if Present (Full_View (Root_Typ)) then | |
290 | Root_Typ := Full_View (Root_Typ); | |
291 | end if; | |
292 | ||
24971415 | 293 | return Static_Dispatch_Tables |
e7e688dd | 294 | and then Is_Library_Level_Tagged_Type (Typ) |
295 | ||
296 | -- If the type is derived from a CPP class we cannot statically | |
297 | -- build the dispatch tables because we must inherit primitives | |
298 | -- from the CPP side. | |
299 | ||
cc60bd16 | 300 | and then not Is_CPP_Class (Root_Typ); |
24971415 | 301 | end Building_Static_DT; |
302 | ||
17e14451 | 303 | ---------------------------------- |
304 | -- Build_Static_Dispatch_Tables -- | |
305 | ---------------------------------- | |
306 | ||
307 | procedure Build_Static_Dispatch_Tables (N : Entity_Id) is | |
308 | Target_List : List_Id; | |
309 | ||
310 | procedure Build_Dispatch_Tables (List : List_Id); | |
311 | -- Build the static dispatch table of tagged types found in the list of | |
312 | -- declarations. The generated nodes are added at the end of Target_List | |
313 | ||
314 | procedure Build_Package_Dispatch_Tables (N : Node_Id); | |
315 | -- Build static dispatch tables associated with package declaration N | |
316 | ||
317 | --------------------------- | |
318 | -- Build_Dispatch_Tables -- | |
319 | --------------------------- | |
320 | ||
321 | procedure Build_Dispatch_Tables (List : List_Id) is | |
322 | D : Node_Id; | |
323 | ||
324 | begin | |
325 | D := First (List); | |
326 | while Present (D) loop | |
327 | ||
328 | -- Handle nested packages and package bodies recursively. The | |
329 | -- generated code is placed on the Target_List established for | |
330 | -- the enclosing compilation unit. | |
331 | ||
332 | if Nkind (D) = N_Package_Declaration then | |
333 | Build_Package_Dispatch_Tables (D); | |
334 | ||
335 | elsif Nkind (D) = N_Package_Body then | |
336 | Build_Dispatch_Tables (Declarations (D)); | |
337 | ||
338 | elsif Nkind (D) = N_Package_Body_Stub | |
339 | and then Present (Library_Unit (D)) | |
340 | then | |
341 | Build_Dispatch_Tables | |
342 | (Declarations (Proper_Body (Unit (Library_Unit (D))))); | |
343 | ||
344 | -- Handle full type declarations and derivations of library | |
345 | -- level tagged types | |
346 | ||
3164ed99 | 347 | elsif Nkind_In (D, N_Full_Type_Declaration, |
348 | N_Derived_Type_Definition) | |
17e14451 | 349 | and then Is_Library_Level_Tagged_Type (Defining_Entity (D)) |
350 | and then Ekind (Defining_Entity (D)) /= E_Record_Subtype | |
351 | and then not Is_Private_Type (Defining_Entity (D)) | |
352 | then | |
442049cc | 353 | -- We do not generate dispatch tables for the internal types |
d9fac90e | 354 | -- created for a type extension with unknown discriminants |
355 | -- The needed information is shared with the source type, | |
356 | -- See Expand_N_Record_Extension. | |
357 | ||
442049cc | 358 | if Is_Underlying_Record_View (Defining_Entity (D)) |
359 | or else | |
360 | (not Comes_From_Source (Defining_Entity (D)) | |
361 | and then | |
2f29393f | 362 | Has_Unknown_Discriminants (Etype (Defining_Entity (D))) |
442049cc | 363 | and then |
2f29393f | 364 | not Comes_From_Source |
365 | (First_Subtype (Defining_Entity (D)))) | |
d9fac90e | 366 | then |
367 | null; | |
d9fac90e | 368 | else |
369 | Insert_List_After_And_Analyze (Last (Target_List), | |
370 | Make_DT (Defining_Entity (D))); | |
371 | end if; | |
17e14451 | 372 | |
373 | -- Handle private types of library level tagged types. We must | |
374 | -- exchange the private and full-view to ensure the correct | |
a735d663 | 375 | -- expansion. If the full view is a synchronized type ignore |
376 | -- the type because the table will be built for the corresponding | |
377 | -- record type, that has its own declaration. | |
17e14451 | 378 | |
379 | elsif (Nkind (D) = N_Private_Type_Declaration | |
380 | or else Nkind (D) = N_Private_Extension_Declaration) | |
381 | and then Present (Full_View (Defining_Entity (D))) | |
17e14451 | 382 | then |
383 | declare | |
acf97c11 | 384 | E1 : constant Entity_Id := Defining_Entity (D); |
a735d663 | 385 | E2 : constant Entity_Id := Full_View (E1); |
acf97c11 | 386 | |
17e14451 | 387 | begin |
a735d663 | 388 | if Is_Library_Level_Tagged_Type (E2) |
389 | and then Ekind (E2) /= E_Record_Subtype | |
390 | and then not Is_Concurrent_Type (E2) | |
391 | then | |
392 | Exchange_Declarations (E1); | |
393 | Insert_List_After_And_Analyze (Last (Target_List), | |
394 | Make_DT (E1)); | |
395 | Exchange_Declarations (E2); | |
396 | end if; | |
17e14451 | 397 | end; |
398 | end if; | |
399 | ||
400 | Next (D); | |
401 | end loop; | |
402 | end Build_Dispatch_Tables; | |
403 | ||
404 | ----------------------------------- | |
405 | -- Build_Package_Dispatch_Tables -- | |
406 | ----------------------------------- | |
407 | ||
408 | procedure Build_Package_Dispatch_Tables (N : Node_Id) is | |
409 | Spec : constant Node_Id := Specification (N); | |
410 | Id : constant Entity_Id := Defining_Entity (N); | |
411 | Vis_Decls : constant List_Id := Visible_Declarations (Spec); | |
412 | Priv_Decls : constant List_Id := Private_Declarations (Spec); | |
413 | ||
414 | begin | |
415 | Push_Scope (Id); | |
416 | ||
417 | if Present (Priv_Decls) then | |
418 | Build_Dispatch_Tables (Vis_Decls); | |
419 | Build_Dispatch_Tables (Priv_Decls); | |
420 | ||
421 | elsif Present (Vis_Decls) then | |
422 | Build_Dispatch_Tables (Vis_Decls); | |
423 | end if; | |
424 | ||
425 | Pop_Scope; | |
426 | end Build_Package_Dispatch_Tables; | |
427 | ||
428 | -- Start of processing for Build_Static_Dispatch_Tables | |
429 | ||
430 | begin | |
431 | if not Expander_Active | |
662256db | 432 | or else not Tagged_Type_Expansion |
17e14451 | 433 | then |
434 | return; | |
435 | end if; | |
436 | ||
437 | if Nkind (N) = N_Package_Declaration then | |
438 | declare | |
439 | Spec : constant Node_Id := Specification (N); | |
440 | Vis_Decls : constant List_Id := Visible_Declarations (Spec); | |
441 | Priv_Decls : constant List_Id := Private_Declarations (Spec); | |
442 | ||
443 | begin | |
444 | if Present (Priv_Decls) | |
445 | and then Is_Non_Empty_List (Priv_Decls) | |
446 | then | |
447 | Target_List := Priv_Decls; | |
448 | ||
449 | elsif not Present (Vis_Decls) then | |
450 | Target_List := New_List; | |
451 | Set_Private_Declarations (Spec, Target_List); | |
452 | else | |
453 | Target_List := Vis_Decls; | |
454 | end if; | |
455 | ||
456 | Build_Package_Dispatch_Tables (N); | |
457 | end; | |
458 | ||
459 | else pragma Assert (Nkind (N) = N_Package_Body); | |
460 | Target_List := Declarations (N); | |
461 | Build_Dispatch_Tables (Target_List); | |
462 | end if; | |
463 | end Build_Static_Dispatch_Tables; | |
464 | ||
aad6babd | 465 | ------------------------------ |
466 | -- Default_Prim_Op_Position -- | |
467 | ------------------------------ | |
468 | ||
68f95949 | 469 | function Default_Prim_Op_Position (E : Entity_Id) return Uint is |
aad6babd | 470 | TSS_Name : TSS_Name_Type; |
aad6babd | 471 | |
472 | begin | |
aad6babd | 473 | Get_Name_String (Chars (E)); |
474 | TSS_Name := | |
475 | TSS_Name_Type | |
476 | (Name_Buffer (Name_Len - TSS_Name'Length + 1 .. Name_Len)); | |
477 | ||
478 | if Chars (E) = Name_uSize then | |
479 | return Uint_1; | |
480 | ||
481 | elsif Chars (E) = Name_uAlignment then | |
482 | return Uint_2; | |
483 | ||
484 | elsif TSS_Name = TSS_Stream_Read then | |
485 | return Uint_3; | |
486 | ||
487 | elsif TSS_Name = TSS_Stream_Write then | |
488 | return Uint_4; | |
489 | ||
490 | elsif TSS_Name = TSS_Stream_Input then | |
491 | return Uint_5; | |
492 | ||
493 | elsif TSS_Name = TSS_Stream_Output then | |
494 | return Uint_6; | |
495 | ||
496 | elsif Chars (E) = Name_Op_Eq then | |
497 | return Uint_7; | |
498 | ||
499 | elsif Chars (E) = Name_uAssign then | |
500 | return Uint_8; | |
501 | ||
502 | elsif TSS_Name = TSS_Deep_Adjust then | |
503 | return Uint_9; | |
504 | ||
505 | elsif TSS_Name = TSS_Deep_Finalize then | |
506 | return Uint_10; | |
507 | ||
76a1c25b | 508 | elsif Ada_Version >= Ada_05 then |
509 | if Chars (E) = Name_uDisp_Asynchronous_Select then | |
510 | return Uint_11; | |
d62940bf | 511 | |
76a1c25b | 512 | elsif Chars (E) = Name_uDisp_Conditional_Select then |
513 | return Uint_12; | |
d62940bf | 514 | |
76a1c25b | 515 | elsif Chars (E) = Name_uDisp_Get_Prim_Op_Kind then |
516 | return Uint_13; | |
d62940bf | 517 | |
76a1c25b | 518 | elsif Chars (E) = Name_uDisp_Get_Task_Id then |
519 | return Uint_14; | |
d62940bf | 520 | |
cdb1c38f | 521 | elsif Chars (E) = Name_uDisp_Requeue then |
76a1c25b | 522 | return Uint_15; |
cdb1c38f | 523 | |
524 | elsif Chars (E) = Name_uDisp_Timed_Select then | |
525 | return Uint_16; | |
76a1c25b | 526 | end if; |
aad6babd | 527 | end if; |
76a1c25b | 528 | |
529 | raise Program_Error; | |
aad6babd | 530 | end Default_Prim_Op_Position; |
531 | ||
7189d17f | 532 | ----------------------------- |
533 | -- Expand_Dispatching_Call -- | |
534 | ----------------------------- | |
ee6ba406 | 535 | |
7189d17f | 536 | procedure Expand_Dispatching_Call (Call_Node : Node_Id) is |
ee6ba406 | 537 | Loc : constant Source_Ptr := Sloc (Call_Node); |
538 | Call_Typ : constant Entity_Id := Etype (Call_Node); | |
539 | ||
2ea346ac | 540 | Ctrl_Arg : constant Node_Id := Controlling_Argument (Call_Node); |
541 | Ctrl_Typ : constant Entity_Id := Base_Type (Etype (Ctrl_Arg)); | |
542 | Param_List : constant List_Id := Parameter_Associations (Call_Node); | |
ee6ba406 | 543 | |
af647dc7 | 544 | Subp : Entity_Id; |
7189d17f | 545 | CW_Typ : Entity_Id; |
546 | New_Call : Node_Id; | |
547 | New_Call_Name : Node_Id; | |
548 | New_Params : List_Id := No_List; | |
549 | Param : Node_Id; | |
550 | Res_Typ : Entity_Id; | |
551 | Subp_Ptr_Typ : Entity_Id; | |
552 | Subp_Typ : Entity_Id; | |
553 | Typ : Entity_Id; | |
554 | Eq_Prim_Op : Entity_Id := Empty; | |
555 | Controlling_Tag : Node_Id; | |
ee6ba406 | 556 | |
557 | function New_Value (From : Node_Id) return Node_Id; | |
9dfe12ae | 558 | -- From is the original Expression. New_Value is equivalent to a call |
559 | -- to Duplicate_Subexpr with an explicit dereference when From is an | |
7189d17f | 560 | -- access parameter. |
561 | ||
9dfe12ae | 562 | --------------- |
563 | -- New_Value -- | |
564 | --------------- | |
565 | ||
ee6ba406 | 566 | function New_Value (From : Node_Id) return Node_Id is |
567 | Res : constant Node_Id := Duplicate_Subexpr (From); | |
ee6ba406 | 568 | begin |
569 | if Is_Access_Type (Etype (From)) then | |
af647dc7 | 570 | return |
571 | Make_Explicit_Dereference (Sloc (From), | |
572 | Prefix => Res); | |
ee6ba406 | 573 | else |
574 | return Res; | |
575 | end if; | |
576 | end New_Value; | |
577 | ||
7189d17f | 578 | -- Start of processing for Expand_Dispatching_Call |
ee6ba406 | 579 | |
580 | begin | |
725a69d2 | 581 | if No_Run_Time_Mode then |
582 | Error_Msg_CRT ("tagged types", Call_Node); | |
583 | return; | |
584 | end if; | |
585 | ||
343d35dc | 586 | -- Expand_Dispatching_Call is called directly from the semantics, |
587 | -- so we need a check to see whether expansion is active before | |
588 | -- proceeding. In addition, there is no need to expand the call | |
589 | -- if we are compiling under restriction No_Dispatching_Calls; | |
590 | -- the semantic analyzer has previously notified the violation | |
591 | -- of this restriction. | |
592 | ||
593 | if not Expander_Active | |
594 | or else Restriction_Active (No_Dispatching_Calls) | |
595 | then | |
596 | return; | |
597 | end if; | |
68f95949 | 598 | |
af647dc7 | 599 | -- Set subprogram. If this is an inherited operation that was |
600 | -- overridden, the body that is being called is its alias. | |
601 | ||
602 | Subp := Entity (Name (Call_Node)); | |
ee6ba406 | 603 | |
604 | if Present (Alias (Subp)) | |
605 | and then Is_Inherited_Operation (Subp) | |
606 | and then No (DTC_Entity (Subp)) | |
607 | then | |
608 | Subp := Alias (Subp); | |
609 | end if; | |
610 | ||
7189d17f | 611 | -- Definition of the class-wide type and the tagged type |
ee6ba406 | 612 | |
7189d17f | 613 | -- If the controlling argument is itself a tag rather than a tagged |
614 | -- object, then use the class-wide type associated with the subprogram's | |
615 | -- controlling type. This case can occur when a call to an inherited | |
616 | -- primitive has an actual that originated from a default parameter | |
617 | -- given by a tag-indeterminate call and when there is no other | |
618 | -- controlling argument providing the tag (AI-239 requires dispatching). | |
619 | -- This capability of dispatching directly by tag is also needed by the | |
620 | -- implementation of AI-260 (for the generic dispatching constructors). | |
621 | ||
2ea346ac | 622 | if Ctrl_Typ = RTE (RE_Tag) |
68f95949 | 623 | or else (RTE_Available (RE_Interface_Tag) |
2ea346ac | 624 | and then Ctrl_Typ = RTE (RE_Interface_Tag)) |
aad6babd | 625 | then |
af647dc7 | 626 | CW_Typ := Class_Wide_Type (Find_Dispatching_Type (Subp)); |
7189d17f | 627 | |
725a69d2 | 628 | -- Class_Wide_Type is applied to the expressions used to initialize |
629 | -- CW_Typ, to ensure that CW_Typ always denotes a class-wide type, since | |
630 | -- there are cases where the controlling type is resolved to a specific | |
631 | -- type (such as for designated types of arguments such as CW'Access). | |
632 | ||
2ea346ac | 633 | elsif Is_Access_Type (Ctrl_Typ) then |
634 | CW_Typ := Class_Wide_Type (Designated_Type (Ctrl_Typ)); | |
7189d17f | 635 | |
ee6ba406 | 636 | else |
2ea346ac | 637 | CW_Typ := Class_Wide_Type (Ctrl_Typ); |
ee6ba406 | 638 | end if; |
639 | ||
640 | Typ := Root_Type (CW_Typ); | |
641 | ||
d62940bf | 642 | if Ekind (Typ) = E_Incomplete_Type then |
643 | Typ := Non_Limited_View (Typ); | |
644 | end if; | |
645 | ||
9af28f61 | 646 | -- Comment needed ??? |
647 | ||
3dbca0d5 | 648 | if Generate_SCIL then |
649 | Insert_Action (Call_Node, | |
650 | New_Scil_Node | |
651 | (Nkind => Dispatching_Call, | |
652 | Related_Node => Call_Node, | |
653 | Entity => Typ, | |
654 | Target_Prim => Subp)); | |
655 | end if; | |
656 | ||
ee6ba406 | 657 | if not Is_Limited_Type (Typ) then |
658 | Eq_Prim_Op := Find_Prim_Op (Typ, Name_Op_Eq); | |
659 | end if; | |
660 | ||
343d35dc | 661 | -- Dispatching call to C++ primitive. Create a new parameter list |
662 | -- with no tag checks. | |
ee6ba406 | 663 | |
cd534f03 | 664 | New_Params := New_List; |
665 | ||
343d35dc | 666 | if Is_CPP_Class (Typ) then |
ee6ba406 | 667 | Param := First_Actual (Call_Node); |
668 | while Present (Param) loop | |
aad6babd | 669 | Append_To (New_Params, Relocate_Node (Param)); |
ee6ba406 | 670 | Next_Actual (Param); |
671 | end loop; | |
672 | ||
343d35dc | 673 | -- Dispatching call to Ada primitive |
674 | ||
ee6ba406 | 675 | elsif Present (Param_List) then |
cd534f03 | 676 | Apply_Tag_Checks (Call_Node); |
ee6ba406 | 677 | |
ee6ba406 | 678 | Param := First_Actual (Call_Node); |
679 | while Present (Param) loop | |
cd534f03 | 680 | -- Cases in which we may have generated runtime checks |
ee6ba406 | 681 | |
cd534f03 | 682 | if Param = Ctrl_Arg |
683 | or else Subp = Eq_Prim_Op | |
684 | then | |
9dfe12ae | 685 | Append_To (New_Params, |
686 | Duplicate_Subexpr_Move_Checks (Param)); | |
ee6ba406 | 687 | |
ee6ba406 | 688 | else |
ee6ba406 | 689 | Append_To (New_Params, Relocate_Node (Param)); |
690 | end if; | |
691 | ||
692 | Next_Actual (Param); | |
693 | end loop; | |
694 | end if; | |
695 | ||
696 | -- Generate the appropriate subprogram pointer type | |
697 | ||
68f95949 | 698 | if Etype (Subp) = Typ then |
ee6ba406 | 699 | Res_Typ := CW_Typ; |
700 | else | |
7189d17f | 701 | Res_Typ := Etype (Subp); |
ee6ba406 | 702 | end if; |
703 | ||
b6b96867 | 704 | Subp_Typ := Create_Itype (E_Subprogram_Type, Call_Node); |
ee6ba406 | 705 | Subp_Ptr_Typ := Create_Itype (E_Access_Subprogram_Type, Call_Node); |
706 | Set_Etype (Subp_Typ, Res_Typ); | |
ee6ba406 | 707 | Set_Returns_By_Ref (Subp_Typ, Returns_By_Ref (Subp)); |
708 | ||
709 | -- Create a new list of parameters which is a copy of the old formal | |
710 | -- list including the creation of a new set of matching entities. | |
711 | ||
712 | declare | |
713 | Old_Formal : Entity_Id := First_Formal (Subp); | |
714 | New_Formal : Entity_Id; | |
725a69d2 | 715 | Extra : Entity_Id := Empty; |
ee6ba406 | 716 | |
717 | begin | |
718 | if Present (Old_Formal) then | |
719 | New_Formal := New_Copy (Old_Formal); | |
720 | Set_First_Entity (Subp_Typ, New_Formal); | |
721 | Param := First_Actual (Call_Node); | |
722 | ||
723 | loop | |
724 | Set_Scope (New_Formal, Subp_Typ); | |
725 | ||
726 | -- Change all the controlling argument types to be class-wide | |
7189d17f | 727 | -- to avoid a recursion in dispatching. |
ee6ba406 | 728 | |
7189d17f | 729 | if Is_Controlling_Formal (New_Formal) then |
ee6ba406 | 730 | Set_Etype (New_Formal, Etype (Param)); |
731 | end if; | |
732 | ||
cc60bd16 | 733 | -- If the type of the formal is an itype, there was code here |
734 | -- introduced in 1998 in revision 1.46, to create a new itype | |
735 | -- by copy. This seems useless, and in fact leads to semantic | |
736 | -- errors when the itype is the completion of a type derived | |
737 | -- from a private type. | |
ee6ba406 | 738 | |
739 | Extra := New_Formal; | |
740 | Next_Formal (Old_Formal); | |
741 | exit when No (Old_Formal); | |
742 | ||
743 | Set_Next_Entity (New_Formal, New_Copy (Old_Formal)); | |
744 | Next_Entity (New_Formal); | |
745 | Next_Actual (Param); | |
746 | end loop; | |
af647dc7 | 747 | |
748 | Set_Next_Entity (New_Formal, Empty); | |
ee6ba406 | 749 | Set_Last_Entity (Subp_Typ, Extra); |
725a69d2 | 750 | end if; |
ee6ba406 | 751 | |
725a69d2 | 752 | -- Now that the explicit formals have been duplicated, any extra |
753 | -- formals needed by the subprogram must be created. | |
ee6ba406 | 754 | |
725a69d2 | 755 | if Present (Extra) then |
756 | Set_Extra_Formal (Extra, Empty); | |
ee6ba406 | 757 | end if; |
725a69d2 | 758 | |
759 | Create_Extra_Formals (Subp_Typ); | |
ee6ba406 | 760 | end; |
761 | ||
b6b96867 | 762 | -- Complete description of pointer type, including size information, as |
763 | -- must be done with itypes to prevent order-of-elaboration anomalies | |
764 | -- in gigi. | |
765 | ||
ee6ba406 | 766 | Set_Etype (Subp_Ptr_Typ, Subp_Ptr_Typ); |
767 | Set_Directly_Designated_Type (Subp_Ptr_Typ, Subp_Typ); | |
acf97c11 | 768 | Set_Convention (Subp_Ptr_Typ, Convention (Subp_Typ)); |
b6b96867 | 769 | Layout_Type (Subp_Ptr_Typ); |
ee6ba406 | 770 | |
68f95949 | 771 | -- If the controlling argument is a value of type Ada.Tag or an abstract |
772 | -- interface class-wide type then use it directly. Otherwise, the tag | |
773 | -- must be extracted from the controlling object. | |
7189d17f | 774 | |
2ea346ac | 775 | if Ctrl_Typ = RTE (RE_Tag) |
68f95949 | 776 | or else (RTE_Available (RE_Interface_Tag) |
2ea346ac | 777 | and then Ctrl_Typ = RTE (RE_Interface_Tag)) |
68f95949 | 778 | then |
779 | Controlling_Tag := Duplicate_Subexpr (Ctrl_Arg); | |
780 | ||
343d35dc | 781 | -- Extract the tag from an unchecked type conversion. Done to avoid |
782 | -- the expansion of additional code just to obtain the value of such | |
783 | -- tag because the current management of interface type conversions | |
784 | -- generates in some cases this unchecked type conversion with the | |
785 | -- tag of the object (see Expand_Interface_Conversion). | |
786 | ||
787 | elsif Nkind (Ctrl_Arg) = N_Unchecked_Type_Conversion | |
788 | and then | |
789 | (Etype (Expression (Ctrl_Arg)) = RTE (RE_Tag) | |
790 | or else | |
791 | (RTE_Available (RE_Interface_Tag) | |
792 | and then | |
793 | Etype (Expression (Ctrl_Arg)) = RTE (RE_Interface_Tag))) | |
794 | then | |
795 | Controlling_Tag := Duplicate_Subexpr (Expression (Ctrl_Arg)); | |
796 | ||
68f95949 | 797 | -- Ada 2005 (AI-251): Abstract interface class-wide type |
798 | ||
2ea346ac | 799 | elsif Is_Interface (Ctrl_Typ) |
800 | and then Is_Class_Wide_Type (Ctrl_Typ) | |
aad6babd | 801 | then |
7189d17f | 802 | Controlling_Tag := Duplicate_Subexpr (Ctrl_Arg); |
803 | ||
804 | else | |
805 | Controlling_Tag := | |
806 | Make_Selected_Component (Loc, | |
807 | Prefix => Duplicate_Subexpr_Move_Checks (Ctrl_Arg), | |
808 | Selector_Name => New_Reference_To (DTC_Entity (Subp), Loc)); | |
809 | end if; | |
810 | ||
343d35dc | 811 | -- Handle dispatching calls to predefined primitives |
ee6ba406 | 812 | |
af647dc7 | 813 | if Is_Predefined_Dispatching_Operation (Subp) |
814 | or else Is_Predefined_Dispatching_Alias (Subp) | |
815 | then | |
68f95949 | 816 | New_Call_Name := |
817 | Unchecked_Convert_To (Subp_Ptr_Typ, | |
343d35dc | 818 | Build_Get_Predefined_Prim_Op_Address (Loc, |
819 | Tag_Node => Controlling_Tag, | |
725a69d2 | 820 | Position => DT_Position (Subp))); |
ee6ba406 | 821 | |
343d35dc | 822 | -- Handle dispatching calls to user-defined primitives |
68f95949 | 823 | |
824 | else | |
825 | New_Call_Name := | |
826 | Unchecked_Convert_To (Subp_Ptr_Typ, | |
343d35dc | 827 | Build_Get_Prim_Op_Address (Loc, |
725a69d2 | 828 | Typ => Find_Dispatching_Type (Subp), |
829 | Tag_Node => Controlling_Tag, | |
830 | Position => DT_Position (Subp))); | |
68f95949 | 831 | end if; |
ee6ba406 | 832 | |
833 | if Nkind (Call_Node) = N_Function_Call then | |
ee6ba406 | 834 | |
725a69d2 | 835 | New_Call := |
836 | Make_Function_Call (Loc, | |
837 | Name => New_Call_Name, | |
838 | Parameter_Associations => New_Params); | |
ee6ba406 | 839 | |
725a69d2 | 840 | -- If this is a dispatching "=", we must first compare the tags so |
841 | -- we generate: x.tag = y.tag and then x = y | |
ee6ba406 | 842 | |
725a69d2 | 843 | if Subp = Eq_Prim_Op then |
844 | Param := First_Actual (Call_Node); | |
aad6babd | 845 | New_Call := |
725a69d2 | 846 | Make_And_Then (Loc, |
847 | Left_Opnd => | |
848 | Make_Op_Eq (Loc, | |
849 | Left_Opnd => | |
850 | Make_Selected_Component (Loc, | |
851 | Prefix => New_Value (Param), | |
852 | Selector_Name => | |
853 | New_Reference_To (First_Tag_Component (Typ), | |
854 | Loc)), | |
ee6ba406 | 855 | |
725a69d2 | 856 | Right_Opnd => |
857 | Make_Selected_Component (Loc, | |
858 | Prefix => | |
859 | Unchecked_Convert_To (Typ, | |
860 | New_Value (Next_Actual (Param))), | |
861 | Selector_Name => | |
862 | New_Reference_To (First_Tag_Component (Typ), | |
863 | Loc))), | |
864 | Right_Opnd => New_Call); | |
ee6ba406 | 865 | end if; |
866 | ||
867 | else | |
868 | New_Call := | |
869 | Make_Procedure_Call_Statement (Loc, | |
870 | Name => New_Call_Name, | |
871 | Parameter_Associations => New_Params); | |
872 | end if; | |
873 | ||
874 | Rewrite (Call_Node, New_Call); | |
725a69d2 | 875 | |
876 | -- Suppress all checks during the analysis of the expanded code | |
36b938a3 | 877 | -- to avoid the generation of spurious warnings under ZFP run-time. |
725a69d2 | 878 | |
879 | Analyze_And_Resolve (Call_Node, Call_Typ, Suppress => All_Checks); | |
7189d17f | 880 | end Expand_Dispatching_Call; |
ee6ba406 | 881 | |
aad6babd | 882 | --------------------------------- |
883 | -- Expand_Interface_Conversion -- | |
884 | --------------------------------- | |
885 | ||
952af0b9 | 886 | procedure Expand_Interface_Conversion |
887 | (N : Node_Id; | |
888 | Is_Static : Boolean := True) | |
889 | is | |
aad6babd | 890 | Loc : constant Source_Ptr := Sloc (N); |
af647dc7 | 891 | Etyp : constant Entity_Id := Etype (N); |
aad6babd | 892 | Operand : constant Node_Id := Expression (N); |
893 | Operand_Typ : Entity_Id := Etype (Operand); | |
d62940bf | 894 | Func : Node_Id; |
af647dc7 | 895 | Iface_Typ : Entity_Id := Etype (N); |
896 | Iface_Tag : Entity_Id; | |
aad6babd | 897 | |
898 | begin | |
343d35dc | 899 | -- Ada 2005 (AI-345): Handle synchronized interface type derivations |
aad6babd | 900 | |
343d35dc | 901 | if Is_Concurrent_Type (Operand_Typ) then |
902 | Operand_Typ := Base_Type (Corresponding_Record_Type (Operand_Typ)); | |
aad6babd | 903 | end if; |
904 | ||
e7e688dd | 905 | -- Handle access to class-wide interface types |
aad6babd | 906 | |
d62940bf | 907 | if Is_Access_Type (Iface_Typ) then |
908 | Iface_Typ := Etype (Directly_Designated_Type (Iface_Typ)); | |
aad6babd | 909 | end if; |
910 | ||
d62940bf | 911 | -- Handle class-wide interface types. This conversion can appear |
912 | -- explicitly in the source code. Example: I'Class (Obj) | |
aad6babd | 913 | |
d62940bf | 914 | if Is_Class_Wide_Type (Iface_Typ) then |
725a69d2 | 915 | Iface_Typ := Root_Type (Iface_Typ); |
d62940bf | 916 | end if; |
917 | ||
79a72728 | 918 | -- If the target type is a tagged synchronized type, the dispatch table |
bf3e1520 | 919 | -- info is in the corresponding record type. |
79a72728 | 920 | |
921 | if Is_Concurrent_Type (Iface_Typ) then | |
922 | Iface_Typ := Corresponding_Record_Type (Iface_Typ); | |
923 | end if; | |
924 | ||
a17cc77d | 925 | -- Freeze the entity associated with the target interface to have |
926 | -- available the attribute Access_Disp_Table. | |
927 | ||
928 | Freeze_Before (N, Iface_Typ); | |
929 | ||
af647dc7 | 930 | pragma Assert (not Is_Static |
931 | or else (not Is_Class_Wide_Type (Iface_Typ) | |
932 | and then Is_Interface (Iface_Typ))); | |
aad6babd | 933 | |
662256db | 934 | if not Tagged_Type_Expansion then |
725a69d2 | 935 | |
936 | -- For VM, just do a conversion ??? | |
937 | ||
938 | Rewrite (N, Unchecked_Convert_To (Etype (N), N)); | |
939 | Analyze (N); | |
940 | return; | |
941 | end if; | |
942 | ||
952af0b9 | 943 | if not Is_Static then |
68f95949 | 944 | |
945 | -- Give error if configurable run time and Displace not available | |
946 | ||
947 | if not RTE_Available (RE_Displace) then | |
cc60bd16 | 948 | Error_Msg_CRT ("dynamic interface conversion", N); |
68f95949 | 949 | return; |
950 | end if; | |
951 | ||
725a69d2 | 952 | -- Handle conversion of access-to-class-wide interface types. Target |
953 | -- can be an access to an object or an access to another class-wide | |
954 | -- interface (see -1- and -2- in the following example): | |
af647dc7 | 955 | |
956 | -- type Iface1_Ref is access all Iface1'Class; | |
957 | -- type Iface2_Ref is access all Iface1'Class; | |
958 | ||
959 | -- Acc1 : Iface1_Ref := new ... | |
960 | -- Obj : Obj_Ref := Obj_Ref (Acc); -- 1 | |
961 | -- Acc2 : Iface2_Ref := Iface2_Ref (Acc); -- 2 | |
962 | ||
963 | if Is_Access_Type (Operand_Typ) then | |
af647dc7 | 964 | Rewrite (N, |
965 | Unchecked_Convert_To (Etype (N), | |
966 | Make_Function_Call (Loc, | |
967 | Name => New_Reference_To (RTE (RE_Displace), Loc), | |
968 | Parameter_Associations => New_List ( | |
969 | ||
970 | Unchecked_Convert_To (RTE (RE_Address), | |
971 | Relocate_Node (Expression (N))), | |
972 | ||
973 | New_Occurrence_Of | |
974 | (Node (First_Elmt (Access_Disp_Table (Iface_Typ))), | |
975 | Loc))))); | |
976 | ||
977 | Analyze (N); | |
978 | return; | |
979 | end if; | |
980 | ||
952af0b9 | 981 | Rewrite (N, |
982 | Make_Function_Call (Loc, | |
983 | Name => New_Reference_To (RTE (RE_Displace), Loc), | |
984 | Parameter_Associations => New_List ( | |
985 | Make_Attribute_Reference (Loc, | |
986 | Prefix => Relocate_Node (Expression (N)), | |
987 | Attribute_Name => Name_Address), | |
af647dc7 | 988 | |
952af0b9 | 989 | New_Occurrence_Of |
990 | (Node (First_Elmt (Access_Disp_Table (Iface_Typ))), | |
991 | Loc)))); | |
992 | ||
993 | Analyze (N); | |
994 | ||
af647dc7 | 995 | -- If the target is a class-wide interface we change the type of the |
996 | -- data returned by IW_Convert to indicate that this is a dispatching | |
997 | -- call. | |
952af0b9 | 998 | |
17e14451 | 999 | declare |
1000 | New_Itype : Entity_Id; | |
952af0b9 | 1001 | |
17e14451 | 1002 | begin |
1003 | New_Itype := Create_Itype (E_Anonymous_Access_Type, N); | |
cc60bd16 | 1004 | Set_Etype (New_Itype, New_Itype); |
17e14451 | 1005 | Set_Directly_Designated_Type (New_Itype, Etyp); |
952af0b9 | 1006 | |
17e14451 | 1007 | Rewrite (N, |
1008 | Make_Explicit_Dereference (Loc, | |
1009 | Prefix => | |
1010 | Unchecked_Convert_To (New_Itype, Relocate_Node (N)))); | |
1011 | Analyze (N); | |
1012 | Freeze_Itype (New_Itype, N); | |
1013 | ||
1014 | return; | |
1015 | end; | |
952af0b9 | 1016 | end if; |
1017 | ||
d62940bf | 1018 | Iface_Tag := Find_Interface_Tag (Operand_Typ, Iface_Typ); |
aad6babd | 1019 | pragma Assert (Iface_Tag /= Empty); |
1020 | ||
d62940bf | 1021 | -- Keep separate access types to interfaces because one internal |
1022 | -- function is used to handle the null value (see following comment) | |
1023 | ||
1024 | if not Is_Access_Type (Etype (N)) then | |
1025 | Rewrite (N, | |
1026 | Unchecked_Convert_To (Etype (N), | |
1027 | Make_Selected_Component (Loc, | |
1028 | Prefix => Relocate_Node (Expression (N)), | |
1029 | Selector_Name => | |
1030 | New_Occurrence_Of (Iface_Tag, Loc)))); | |
1031 | ||
1032 | else | |
1033 | -- Build internal function to handle the case in which the | |
1034 | -- actual is null. If the actual is null returns null because | |
1035 | -- no displacement is required; otherwise performs a type | |
1036 | -- conversion that will be expanded in the code that returns | |
1037 | -- the value of the displaced actual. That is: | |
1038 | ||
af647dc7 | 1039 | -- function Func (O : Address) return Iface_Typ is |
17e14451 | 1040 | -- type Op_Typ is access all Operand_Typ; |
1041 | -- Aux : Op_Typ := To_Op_Typ (O); | |
d62940bf | 1042 | -- begin |
af647dc7 | 1043 | -- if O = Null_Address then |
d62940bf | 1044 | -- return null; |
1045 | -- else | |
17e14451 | 1046 | -- return Iface_Typ!(Aux.Iface_Tag'Address); |
d62940bf | 1047 | -- end if; |
1048 | -- end Func; | |
1049 | ||
af647dc7 | 1050 | declare |
17e14451 | 1051 | Desig_Typ : Entity_Id; |
1052 | Fent : Entity_Id; | |
1053 | New_Typ_Decl : Node_Id; | |
17e14451 | 1054 | Stats : List_Id; |
1055 | ||
af647dc7 | 1056 | begin |
1057 | Desig_Typ := Etype (Expression (N)); | |
d62940bf | 1058 | |
af647dc7 | 1059 | if Is_Access_Type (Desig_Typ) then |
865909d3 | 1060 | Desig_Typ := |
1061 | Available_View (Directly_Designated_Type (Desig_Typ)); | |
af647dc7 | 1062 | end if; |
d62940bf | 1063 | |
e7e688dd | 1064 | if Is_Concurrent_Type (Desig_Typ) then |
1065 | Desig_Typ := Base_Type (Corresponding_Record_Type (Desig_Typ)); | |
1066 | end if; | |
1067 | ||
17e14451 | 1068 | New_Typ_Decl := |
1069 | Make_Full_Type_Declaration (Loc, | |
1070 | Defining_Identifier => | |
1071 | Make_Defining_Identifier (Loc, New_Internal_Name ('T')), | |
1072 | Type_Definition => | |
1073 | Make_Access_To_Object_Definition (Loc, | |
1074 | All_Present => True, | |
1075 | Null_Exclusion_Present => False, | |
1076 | Constant_Present => False, | |
1077 | Subtype_Indication => | |
1078 | New_Reference_To (Desig_Typ, Loc))); | |
d62940bf | 1079 | |
725a69d2 | 1080 | Stats := New_List ( |
17e14451 | 1081 | Make_Simple_Return_Statement (Loc, |
1082 | Unchecked_Convert_To (Etype (N), | |
1083 | Make_Attribute_Reference (Loc, | |
1084 | Prefix => | |
1085 | Make_Selected_Component (Loc, | |
1086 | Prefix => | |
e7e688dd | 1087 | Unchecked_Convert_To |
1088 | (Defining_Identifier (New_Typ_Decl), | |
1089 | Make_Identifier (Loc, Name_uO)), | |
17e14451 | 1090 | Selector_Name => |
1091 | New_Occurrence_Of (Iface_Tag, Loc)), | |
1092 | Attribute_Name => Name_Address)))); | |
725a69d2 | 1093 | |
17e14451 | 1094 | -- If the type is null-excluding, no need for the null branch. |
1095 | -- Otherwise we need to check for it and return null. | |
1096 | ||
1097 | if not Can_Never_Be_Null (Etype (N)) then | |
1098 | Stats := New_List ( | |
1099 | Make_If_Statement (Loc, | |
1100 | Condition => | |
1101 | Make_Op_Eq (Loc, | |
1102 | Left_Opnd => Make_Identifier (Loc, Name_uO), | |
1103 | Right_Opnd => New_Reference_To | |
1104 | (RTE (RE_Null_Address), Loc)), | |
1105 | ||
1106 | Then_Statements => New_List ( | |
1107 | Make_Simple_Return_Statement (Loc, | |
1108 | Make_Null (Loc))), | |
1109 | Else_Statements => Stats)); | |
1110 | end if; | |
d62940bf | 1111 | |
17e14451 | 1112 | Fent := |
1113 | Make_Defining_Identifier (Loc, | |
1114 | New_Internal_Name ('F')); | |
af647dc7 | 1115 | |
17e14451 | 1116 | Func := |
1117 | Make_Subprogram_Body (Loc, | |
1118 | Specification => | |
1119 | Make_Function_Specification (Loc, | |
1120 | Defining_Unit_Name => Fent, | |
d62940bf | 1121 | |
17e14451 | 1122 | Parameter_Specifications => New_List ( |
1123 | Make_Parameter_Specification (Loc, | |
1124 | Defining_Identifier => | |
1125 | Make_Defining_Identifier (Loc, Name_uO), | |
1126 | Parameter_Type => | |
1127 | New_Reference_To (RTE (RE_Address), Loc))), | |
d62940bf | 1128 | |
17e14451 | 1129 | Result_Definition => |
1130 | New_Reference_To (Etype (N), Loc)), | |
d62940bf | 1131 | |
e7e688dd | 1132 | Declarations => New_List (New_Typ_Decl), |
d62940bf | 1133 | |
17e14451 | 1134 | Handled_Statement_Sequence => |
1135 | Make_Handled_Sequence_Of_Statements (Loc, Stats)); | |
d62940bf | 1136 | |
17e14451 | 1137 | -- Place function body before the expression containing the |
1138 | -- conversion. We suppress all checks because the body of the | |
1139 | -- internally generated function already takes care of the case | |
1140 | -- in which the actual is null; therefore there is no need to | |
1141 | -- double check that the pointer is not null when the program | |
1142 | -- executes the alternative that performs the type conversion). | |
af647dc7 | 1143 | |
17e14451 | 1144 | Insert_Action (N, Func, Suppress => All_Checks); |
af647dc7 | 1145 | |
17e14451 | 1146 | if Is_Access_Type (Etype (Expression (N))) then |
af647dc7 | 1147 | |
e7e688dd | 1148 | -- Generate: Func (Address!(Expression)) |
af647dc7 | 1149 | |
17e14451 | 1150 | Rewrite (N, |
1151 | Make_Function_Call (Loc, | |
1152 | Name => New_Reference_To (Fent, Loc), | |
1153 | Parameter_Associations => New_List ( | |
e7e688dd | 1154 | Unchecked_Convert_To (RTE (RE_Address), |
1155 | Relocate_Node (Expression (N)))))); | |
17e14451 | 1156 | |
1157 | else | |
e7e688dd | 1158 | -- Generate: Func (Operand_Typ!(Expression)'Address) |
17e14451 | 1159 | |
1160 | Rewrite (N, | |
1161 | Make_Function_Call (Loc, | |
1162 | Name => New_Reference_To (Fent, Loc), | |
1163 | Parameter_Associations => New_List ( | |
1164 | Make_Attribute_Reference (Loc, | |
1165 | Prefix => Unchecked_Convert_To (Operand_Typ, | |
1166 | Relocate_Node (Expression (N))), | |
1167 | Attribute_Name => Name_Address)))); | |
1168 | end if; | |
1169 | end; | |
d62940bf | 1170 | end if; |
aad6babd | 1171 | |
1172 | Analyze (N); | |
1173 | end Expand_Interface_Conversion; | |
1174 | ||
1175 | ------------------------------ | |
1176 | -- Expand_Interface_Actuals -- | |
1177 | ------------------------------ | |
1178 | ||
1179 | procedure Expand_Interface_Actuals (Call_Node : Node_Id) is | |
aad6babd | 1180 | Actual : Node_Id; |
d62940bf | 1181 | Actual_Dup : Node_Id; |
aad6babd | 1182 | Actual_Typ : Entity_Id; |
d62940bf | 1183 | Anon : Entity_Id; |
aad6babd | 1184 | Conversion : Node_Id; |
1185 | Formal : Entity_Id; | |
1186 | Formal_Typ : Entity_Id; | |
1187 | Subp : Entity_Id; | |
d62940bf | 1188 | Formal_DDT : Entity_Id; |
1189 | Actual_DDT : Entity_Id; | |
aad6babd | 1190 | |
1191 | begin | |
1192 | -- This subprogram is called directly from the semantics, so we need a | |
1193 | -- check to see whether expansion is active before proceeding. | |
1194 | ||
1195 | if not Expander_Active then | |
1196 | return; | |
1197 | end if; | |
1198 | ||
1199 | -- Call using access to subprogram with explicit dereference | |
1200 | ||
1201 | if Nkind (Name (Call_Node)) = N_Explicit_Dereference then | |
1202 | Subp := Etype (Name (Call_Node)); | |
1203 | ||
4e5db562 | 1204 | -- Call using selected component |
1205 | ||
1206 | elsif Nkind (Name (Call_Node)) = N_Selected_Component then | |
1207 | Subp := Entity (Selector_Name (Name (Call_Node))); | |
1208 | ||
1209 | -- Call using direct name | |
aad6babd | 1210 | |
1211 | else | |
1212 | Subp := Entity (Name (Call_Node)); | |
1213 | end if; | |
1214 | ||
725a69d2 | 1215 | -- Ada 2005 (AI-251): Look for interface type formals to force "this" |
1216 | -- displacement | |
1217 | ||
aad6babd | 1218 | Formal := First_Formal (Subp); |
1219 | Actual := First_Actual (Call_Node); | |
aad6babd | 1220 | while Present (Formal) loop |
725a69d2 | 1221 | Formal_Typ := Etype (Formal); |
d62940bf | 1222 | |
1223 | if Ekind (Formal_Typ) = E_Record_Type_With_Private then | |
1224 | Formal_Typ := Full_View (Formal_Typ); | |
1225 | end if; | |
1226 | ||
1227 | if Is_Access_Type (Formal_Typ) then | |
1228 | Formal_DDT := Directly_Designated_Type (Formal_Typ); | |
1229 | end if; | |
1230 | ||
aad6babd | 1231 | Actual_Typ := Etype (Actual); |
1232 | ||
d62940bf | 1233 | if Is_Access_Type (Actual_Typ) then |
1234 | Actual_DDT := Directly_Designated_Type (Actual_Typ); | |
1235 | end if; | |
1236 | ||
725a69d2 | 1237 | if Is_Interface (Formal_Typ) |
1238 | and then Is_Class_Wide_Type (Formal_Typ) | |
1239 | then | |
d62940bf | 1240 | -- No need to displace the pointer if the type of the actual |
725a69d2 | 1241 | -- coindices with the type of the formal. |
aad6babd | 1242 | |
725a69d2 | 1243 | if Actual_Typ = Formal_Typ then |
d62940bf | 1244 | null; |
1245 | ||
725a69d2 | 1246 | -- No need to displace the pointer if the interface type is |
1247 | -- a parent of the type of the actual because in this case the | |
1248 | -- interface primitives are located in the primary dispatch table. | |
aad6babd | 1249 | |
a652dd51 | 1250 | elsif Is_Ancestor (Formal_Typ, Actual_Typ) then |
d62940bf | 1251 | null; |
1252 | ||
725a69d2 | 1253 | -- Implicit conversion to the class-wide formal type to force |
1254 | -- the displacement of the pointer. | |
1255 | ||
d62940bf | 1256 | else |
1257 | Conversion := Convert_To (Formal_Typ, Relocate_Node (Actual)); | |
725a69d2 | 1258 | Rewrite (Actual, Conversion); |
d62940bf | 1259 | Analyze_And_Resolve (Actual, Formal_Typ); |
1260 | end if; | |
aad6babd | 1261 | |
725a69d2 | 1262 | -- Access to class-wide interface type |
aad6babd | 1263 | |
1264 | elsif Is_Access_Type (Formal_Typ) | |
725a69d2 | 1265 | and then Is_Interface (Formal_DDT) |
1266 | and then Is_Class_Wide_Type (Formal_DDT) | |
aad6babd | 1267 | and then Interface_Present_In_Ancestor |
d62940bf | 1268 | (Typ => Actual_DDT, |
1269 | Iface => Etype (Formal_DDT)) | |
aad6babd | 1270 | then |
725a69d2 | 1271 | -- Handle attributes 'Access and 'Unchecked_Access |
1272 | ||
aad6babd | 1273 | if Nkind (Actual) = N_Attribute_Reference |
1274 | and then | |
1275 | (Attribute_Name (Actual) = Name_Access | |
1276 | or else Attribute_Name (Actual) = Name_Unchecked_Access) | |
1277 | then | |
5e82d8fe | 1278 | -- This case must have been handled by the analysis and |
1279 | -- expansion of 'Access. The only exception is when types | |
1280 | -- match and no further expansion is required. | |
aad6babd | 1281 | |
5e82d8fe | 1282 | pragma Assert (Base_Type (Etype (Prefix (Actual))) |
1283 | = Base_Type (Formal_DDT)); | |
1284 | null; | |
aad6babd | 1285 | |
725a69d2 | 1286 | -- No need to displace the pointer if the type of the actual |
1287 | -- coincides with the type of the formal. | |
d62940bf | 1288 | |
725a69d2 | 1289 | elsif Actual_DDT = Formal_DDT then |
d62940bf | 1290 | null; |
1291 | ||
725a69d2 | 1292 | -- No need to displace the pointer if the interface type is |
1293 | -- a parent of the type of the actual because in this case the | |
1294 | -- interface primitives are located in the primary dispatch table. | |
d62940bf | 1295 | |
a652dd51 | 1296 | elsif Is_Ancestor (Formal_DDT, Actual_DDT) then |
d62940bf | 1297 | null; |
1298 | ||
aad6babd | 1299 | else |
d62940bf | 1300 | Actual_Dup := Relocate_Node (Actual); |
1301 | ||
1302 | if From_With_Type (Actual_Typ) then | |
1303 | ||
1304 | -- If the type of the actual parameter comes from a limited | |
1305 | -- with-clause and the non-limited view is already available | |
9ced80be | 1306 | -- we replace the anonymous access type by a duplicate |
1307 | -- declaration whose designated type is the non-limited view | |
d62940bf | 1308 | |
1309 | if Ekind (Actual_DDT) = E_Incomplete_Type | |
1310 | and then Present (Non_Limited_View (Actual_DDT)) | |
1311 | then | |
1312 | Anon := New_Copy (Actual_Typ); | |
1313 | ||
1314 | if Is_Itype (Anon) then | |
1315 | Set_Scope (Anon, Current_Scope); | |
1316 | end if; | |
1317 | ||
1318 | Set_Directly_Designated_Type (Anon, | |
1319 | Non_Limited_View (Actual_DDT)); | |
1320 | Set_Etype (Actual_Dup, Anon); | |
1321 | ||
1322 | elsif Is_Class_Wide_Type (Actual_DDT) | |
1323 | and then Ekind (Etype (Actual_DDT)) = E_Incomplete_Type | |
1324 | and then Present (Non_Limited_View (Etype (Actual_DDT))) | |
1325 | then | |
1326 | Anon := New_Copy (Actual_Typ); | |
1327 | ||
1328 | if Is_Itype (Anon) then | |
1329 | Set_Scope (Anon, Current_Scope); | |
1330 | end if; | |
1331 | ||
1332 | Set_Directly_Designated_Type (Anon, | |
1333 | New_Copy (Actual_DDT)); | |
1334 | Set_Class_Wide_Type (Directly_Designated_Type (Anon), | |
1335 | New_Copy (Class_Wide_Type (Actual_DDT))); | |
1336 | Set_Etype (Directly_Designated_Type (Anon), | |
1337 | Non_Limited_View (Etype (Actual_DDT))); | |
1338 | Set_Etype ( | |
1339 | Class_Wide_Type (Directly_Designated_Type (Anon)), | |
1340 | Non_Limited_View (Etype (Actual_DDT))); | |
1341 | Set_Etype (Actual_Dup, Anon); | |
1342 | end if; | |
1343 | end if; | |
1344 | ||
1345 | Conversion := Convert_To (Formal_Typ, Actual_Dup); | |
1346 | Rewrite (Actual, Conversion); | |
aad6babd | 1347 | Analyze_And_Resolve (Actual, Formal_Typ); |
1348 | end if; | |
1349 | end if; | |
1350 | ||
1351 | Next_Actual (Actual); | |
1352 | Next_Formal (Formal); | |
1353 | end loop; | |
1354 | end Expand_Interface_Actuals; | |
1355 | ||
1356 | ---------------------------- | |
1357 | -- Expand_Interface_Thunk -- | |
1358 | ---------------------------- | |
1359 | ||
725a69d2 | 1360 | procedure Expand_Interface_Thunk |
17e14451 | 1361 | (Prim : Node_Id; |
1362 | Thunk_Id : out Entity_Id; | |
1363 | Thunk_Code : out Node_Id) | |
aad6babd | 1364 | is |
17e14451 | 1365 | Loc : constant Source_Ptr := Sloc (Prim); |
725a69d2 | 1366 | Actuals : constant List_Id := New_List; |
1367 | Decl : constant List_Id := New_List; | |
1368 | Formals : constant List_Id := New_List; | |
1369 | ||
1370 | Controlling_Typ : Entity_Id; | |
1371 | Decl_1 : Node_Id; | |
1372 | Decl_2 : Node_Id; | |
1373 | Formal : Node_Id; | |
cc60bd16 | 1374 | New_Arg : Node_Id; |
1375 | Offset_To_Top : Node_Id; | |
725a69d2 | 1376 | Target : Entity_Id; |
1377 | Target_Formal : Entity_Id; | |
aad6babd | 1378 | |
1379 | begin | |
725a69d2 | 1380 | Thunk_Id := Empty; |
1381 | Thunk_Code := Empty; | |
1382 | ||
aad6babd | 1383 | -- Traverse the list of alias to find the final target |
1384 | ||
17e14451 | 1385 | Target := Prim; |
aad6babd | 1386 | while Present (Alias (Target)) loop |
1387 | Target := Alias (Target); | |
1388 | end loop; | |
1389 | ||
725a69d2 | 1390 | -- In case of primitives that are functions without formals and |
1391 | -- a controlling result there is no need to build the thunk. | |
1392 | ||
1393 | if not Present (First_Formal (Target)) then | |
1394 | pragma Assert (Ekind (Target) = E_Function | |
1395 | and then Has_Controlling_Result (Target)); | |
1396 | return; | |
1397 | end if; | |
1398 | ||
aad6babd | 1399 | -- Duplicate the formals |
1400 | ||
d62940bf | 1401 | Formal := First_Formal (Target); |
aad6babd | 1402 | while Present (Formal) loop |
725a69d2 | 1403 | Append_To (Formals, |
1404 | Make_Parameter_Specification (Loc, | |
1405 | Defining_Identifier => | |
1406 | Make_Defining_Identifier (Sloc (Formal), | |
1407 | Chars => Chars (Formal)), | |
1408 | In_Present => In_Present (Parent (Formal)), | |
1409 | Out_Present => Out_Present (Parent (Formal)), | |
1410 | Parameter_Type => | |
1411 | New_Reference_To (Etype (Formal), Loc), | |
1412 | Expression => New_Copy_Tree (Expression (Parent (Formal))))); | |
d62940bf | 1413 | |
aad6babd | 1414 | Next_Formal (Formal); |
1415 | end loop; | |
1416 | ||
17e14451 | 1417 | Controlling_Typ := Find_Dispatching_Type (Target); |
aad6babd | 1418 | |
725a69d2 | 1419 | Target_Formal := First_Formal (Target); |
1420 | Formal := First (Formals); | |
1421 | while Present (Formal) loop | |
1422 | if Ekind (Target_Formal) = E_In_Parameter | |
1423 | and then Ekind (Etype (Target_Formal)) = E_Anonymous_Access_Type | |
1424 | and then Directly_Designated_Type (Etype (Target_Formal)) | |
1425 | = Controlling_Typ | |
1426 | then | |
1427 | -- Generate: | |
aad6babd | 1428 | |
17e14451 | 1429 | -- type T is access all <<type of the target formal>> |
1430 | -- S : Storage_Offset := Storage_Offset!(Formal) | |
1431 | -- - Offset_To_Top (address!(Formal)) | |
725a69d2 | 1432 | |
1433 | Decl_2 := | |
1434 | Make_Full_Type_Declaration (Loc, | |
1435 | Defining_Identifier => | |
1436 | Make_Defining_Identifier (Loc, | |
1437 | New_Internal_Name ('T')), | |
1438 | Type_Definition => | |
1439 | Make_Access_To_Object_Definition (Loc, | |
1440 | All_Present => True, | |
1441 | Null_Exclusion_Present => False, | |
1442 | Constant_Present => False, | |
1443 | Subtype_Indication => | |
aad6babd | 1444 | New_Reference_To |
725a69d2 | 1445 | (Directly_Designated_Type |
1446 | (Etype (Target_Formal)), Loc))); | |
1447 | ||
cc60bd16 | 1448 | New_Arg := |
1449 | Unchecked_Convert_To (RTE (RE_Address), | |
1450 | New_Reference_To (Defining_Identifier (Formal), Loc)); | |
1451 | ||
1452 | if not RTE_Available (RE_Offset_To_Top) then | |
1453 | Offset_To_Top := | |
1454 | Build_Offset_To_Top (Loc, New_Arg); | |
1455 | else | |
1456 | Offset_To_Top := | |
1457 | Make_Function_Call (Loc, | |
1458 | Name => New_Reference_To (RTE (RE_Offset_To_Top), Loc), | |
1459 | Parameter_Associations => New_List (New_Arg)); | |
1460 | end if; | |
1461 | ||
725a69d2 | 1462 | Decl_1 := |
1463 | Make_Object_Declaration (Loc, | |
1464 | Defining_Identifier => | |
1465 | Make_Defining_Identifier (Loc, | |
1466 | New_Internal_Name ('S')), | |
1467 | Constant_Present => True, | |
1468 | Object_Definition => | |
1469 | New_Reference_To (RTE (RE_Storage_Offset), Loc), | |
1470 | Expression => | |
1471 | Make_Op_Subtract (Loc, | |
1472 | Left_Opnd => | |
1473 | Unchecked_Convert_To | |
1474 | (RTE (RE_Storage_Offset), | |
1475 | New_Reference_To (Defining_Identifier (Formal), Loc)), | |
1476 | Right_Opnd => | |
cc60bd16 | 1477 | Offset_To_Top)); |
725a69d2 | 1478 | |
1479 | Append_To (Decl, Decl_2); | |
1480 | Append_To (Decl, Decl_1); | |
1481 | ||
17e14451 | 1482 | -- Reference the new actual. Generate: |
1483 | -- T!(S) | |
725a69d2 | 1484 | |
1485 | Append_To (Actuals, | |
1486 | Unchecked_Convert_To | |
1487 | (Defining_Identifier (Decl_2), | |
1488 | New_Reference_To (Defining_Identifier (Decl_1), Loc))); | |
1489 | ||
1490 | elsif Etype (Target_Formal) = Controlling_Typ then | |
1491 | -- Generate: | |
aad6babd | 1492 | |
17e14451 | 1493 | -- S1 : Storage_Offset := Storage_Offset!(Formal'Address) |
1494 | -- - Offset_To_Top (Formal'Address) | |
1495 | -- S2 : Addr_Ptr := Addr_Ptr!(S1) | |
aad6babd | 1496 | |
cc60bd16 | 1497 | New_Arg := |
1498 | Make_Attribute_Reference (Loc, | |
1499 | Prefix => | |
1500 | New_Reference_To (Defining_Identifier (Formal), Loc), | |
1501 | Attribute_Name => | |
1502 | Name_Address); | |
1503 | ||
1504 | if not RTE_Available (RE_Offset_To_Top) then | |
1505 | Offset_To_Top := | |
1506 | Build_Offset_To_Top (Loc, New_Arg); | |
1507 | else | |
1508 | Offset_To_Top := | |
1509 | Make_Function_Call (Loc, | |
1510 | Name => New_Reference_To (RTE (RE_Offset_To_Top), Loc), | |
1511 | Parameter_Associations => New_List (New_Arg)); | |
1512 | end if; | |
1513 | ||
725a69d2 | 1514 | Decl_1 := |
1515 | Make_Object_Declaration (Loc, | |
1516 | Defining_Identifier => | |
1517 | Make_Defining_Identifier (Loc, New_Internal_Name ('S')), | |
1518 | Constant_Present => True, | |
1519 | Object_Definition => | |
1520 | New_Reference_To (RTE (RE_Storage_Offset), Loc), | |
1521 | Expression => | |
1522 | Make_Op_Subtract (Loc, | |
1523 | Left_Opnd => | |
1524 | Unchecked_Convert_To | |
1525 | (RTE (RE_Storage_Offset), | |
1526 | Make_Attribute_Reference (Loc, | |
1527 | Prefix => | |
1528 | New_Reference_To | |
1529 | (Defining_Identifier (Formal), Loc), | |
1530 | Attribute_Name => Name_Address)), | |
1531 | Right_Opnd => | |
cc60bd16 | 1532 | Offset_To_Top)); |
aad6babd | 1533 | |
725a69d2 | 1534 | Decl_2 := |
1535 | Make_Object_Declaration (Loc, | |
1536 | Defining_Identifier => | |
1537 | Make_Defining_Identifier (Loc, New_Internal_Name ('S')), | |
1538 | Constant_Present => True, | |
1539 | Object_Definition => New_Reference_To (RTE (RE_Addr_Ptr), Loc), | |
1540 | Expression => | |
1541 | Unchecked_Convert_To | |
1542 | (RTE (RE_Addr_Ptr), | |
1543 | New_Reference_To (Defining_Identifier (Decl_1), Loc))); | |
aad6babd | 1544 | |
725a69d2 | 1545 | Append_To (Decl, Decl_1); |
1546 | Append_To (Decl, Decl_2); | |
952af0b9 | 1547 | |
17e14451 | 1548 | -- Reference the new actual. Generate: |
1549 | -- Target_Formal (S2.all) | |
aad6babd | 1550 | |
725a69d2 | 1551 | Append_To (Actuals, |
1552 | Unchecked_Convert_To | |
17e14451 | 1553 | (Etype (Target_Formal), |
725a69d2 | 1554 | Make_Explicit_Dereference (Loc, |
1555 | New_Reference_To (Defining_Identifier (Decl_2), Loc)))); | |
aad6babd | 1556 | |
725a69d2 | 1557 | -- No special management required for this actual |
aad6babd | 1558 | |
725a69d2 | 1559 | else |
1560 | Append_To (Actuals, | |
1561 | New_Reference_To (Defining_Identifier (Formal), Loc)); | |
1562 | end if; | |
1563 | ||
1564 | Next_Formal (Target_Formal); | |
aad6babd | 1565 | Next (Formal); |
1566 | end loop; | |
1567 | ||
725a69d2 | 1568 | Thunk_Id := |
1569 | Make_Defining_Identifier (Loc, | |
1570 | Chars => New_Internal_Name ('T')); | |
1571 | ||
e7e688dd | 1572 | Set_Is_Thunk (Thunk_Id); |
1573 | ||
d62940bf | 1574 | if Ekind (Target) = E_Procedure then |
725a69d2 | 1575 | Thunk_Code := |
aad6babd | 1576 | Make_Subprogram_Body (Loc, |
1577 | Specification => | |
1578 | Make_Procedure_Specification (Loc, | |
1579 | Defining_Unit_Name => Thunk_Id, | |
1580 | Parameter_Specifications => Formals), | |
1581 | Declarations => Decl, | |
1582 | Handled_Statement_Sequence => | |
1583 | Make_Handled_Sequence_Of_Statements (Loc, | |
1584 | Statements => New_List ( | |
1585 | Make_Procedure_Call_Statement (Loc, | |
725a69d2 | 1586 | Name => New_Occurrence_Of (Target, Loc), |
1587 | Parameter_Associations => Actuals)))); | |
aad6babd | 1588 | |
d62940bf | 1589 | else pragma Assert (Ekind (Target) = E_Function); |
aad6babd | 1590 | |
725a69d2 | 1591 | Thunk_Code := |
aad6babd | 1592 | Make_Subprogram_Body (Loc, |
1593 | Specification => | |
1594 | Make_Function_Specification (Loc, | |
1595 | Defining_Unit_Name => Thunk_Id, | |
1596 | Parameter_Specifications => Formals, | |
d62940bf | 1597 | Result_Definition => |
1598 | New_Copy (Result_Definition (Parent (Target)))), | |
aad6babd | 1599 | Declarations => Decl, |
1600 | Handled_Statement_Sequence => | |
1601 | Make_Handled_Sequence_Of_Statements (Loc, | |
1602 | Statements => New_List ( | |
17e14451 | 1603 | Make_Simple_Return_Statement (Loc, |
aad6babd | 1604 | Make_Function_Call (Loc, |
1605 | Name => New_Occurrence_Of (Target, Loc), | |
1606 | Parameter_Associations => Actuals))))); | |
1607 | end if; | |
aad6babd | 1608 | end Expand_Interface_Thunk; |
1609 | ||
3dbca0d5 | 1610 | ------------------------ |
1611 | -- Get_Scil_Node_Kind -- | |
1612 | ------------------------ | |
1613 | ||
1614 | function Get_Scil_Node_Kind (Node : Node_Id) return Scil_Node_Kind is | |
1615 | begin | |
9af28f61 | 1616 | pragma Assert |
1617 | (Nkind (Node) = N_Null_Statement and then Is_Scil_Node (Node)); | |
3dbca0d5 | 1618 | return Scil_Node_Kind'Val (UI_To_Int (Scil_Nkind (Node))); |
1619 | end Get_Scil_Node_Kind; | |
1620 | ||
24971415 | 1621 | ------------ |
1622 | -- Has_DT -- | |
1623 | ------------ | |
1624 | ||
1625 | function Has_DT (Typ : Entity_Id) return Boolean is | |
1626 | begin | |
1627 | return not Is_Interface (Typ) | |
1628 | and then not Restriction_Active (No_Dispatching_Calls); | |
1629 | end Has_DT; | |
1630 | ||
a652dd51 | 1631 | ----------------------------------------- |
1632 | -- Is_Predefined_Dispatching_Operation -- | |
1633 | ----------------------------------------- | |
1634 | ||
1635 | function Is_Predefined_Dispatching_Operation | |
1636 | (E : Entity_Id) return Boolean | |
1637 | is | |
1638 | TSS_Name : TSS_Name_Type; | |
1639 | ||
1640 | begin | |
1641 | if not Is_Dispatching_Operation (E) then | |
1642 | return False; | |
1643 | end if; | |
1644 | ||
1645 | Get_Name_String (Chars (E)); | |
1646 | ||
1647 | -- Most predefined primitives have internally generated names. Equality | |
1648 | -- must be treated differently; the predefined operation is recognized | |
1649 | -- as a homogeneous binary operator that returns Boolean. | |
1650 | ||
1651 | if Name_Len > TSS_Name_Type'Last then | |
1652 | TSS_Name := TSS_Name_Type (Name_Buffer (Name_Len - TSS_Name'Length + 1 | |
1653 | .. Name_Len)); | |
1654 | if Chars (E) = Name_uSize | |
1655 | or else Chars (E) = Name_uAlignment | |
1656 | or else TSS_Name = TSS_Stream_Read | |
1657 | or else TSS_Name = TSS_Stream_Write | |
1658 | or else TSS_Name = TSS_Stream_Input | |
1659 | or else TSS_Name = TSS_Stream_Output | |
1660 | or else | |
1661 | (Chars (E) = Name_Op_Eq | |
1662 | and then Etype (First_Entity (E)) = Etype (Last_Entity (E))) | |
1663 | or else Chars (E) = Name_uAssign | |
1664 | or else TSS_Name = TSS_Deep_Adjust | |
1665 | or else TSS_Name = TSS_Deep_Finalize | |
1666 | or else Is_Predefined_Interface_Primitive (E) | |
1667 | then | |
1668 | return True; | |
1669 | end if; | |
1670 | end if; | |
1671 | ||
1672 | return False; | |
1673 | end Is_Predefined_Dispatching_Operation; | |
1674 | ||
af647dc7 | 1675 | ------------------------------------- |
1676 | -- Is_Predefined_Dispatching_Alias -- | |
1677 | ------------------------------------- | |
1678 | ||
1679 | function Is_Predefined_Dispatching_Alias (Prim : Entity_Id) return Boolean | |
1680 | is | |
1681 | E : Entity_Id; | |
1682 | ||
1683 | begin | |
1684 | if not Is_Predefined_Dispatching_Operation (Prim) | |
1685 | and then Present (Alias (Prim)) | |
1686 | then | |
1687 | E := Prim; | |
1688 | while Present (Alias (E)) loop | |
1689 | E := Alias (E); | |
1690 | end loop; | |
1691 | ||
1692 | if Is_Predefined_Dispatching_Operation (E) then | |
1693 | return True; | |
1694 | end if; | |
1695 | end if; | |
1696 | ||
1697 | return False; | |
1698 | end Is_Predefined_Dispatching_Alias; | |
1699 | ||
a652dd51 | 1700 | --------------------------------------- |
1701 | -- Is_Predefined_Interface_Primitive -- | |
1702 | --------------------------------------- | |
1703 | ||
1704 | function Is_Predefined_Interface_Primitive (E : Entity_Id) return Boolean is | |
1705 | begin | |
1706 | return Ada_Version >= Ada_05 | |
1707 | and then (Chars (E) = Name_uDisp_Asynchronous_Select or else | |
1708 | Chars (E) = Name_uDisp_Conditional_Select or else | |
1709 | Chars (E) = Name_uDisp_Get_Prim_Op_Kind or else | |
1710 | Chars (E) = Name_uDisp_Get_Task_Id or else | |
1711 | Chars (E) = Name_uDisp_Requeue or else | |
1712 | Chars (E) = Name_uDisp_Timed_Select); | |
1713 | end Is_Predefined_Interface_Primitive; | |
1714 | ||
76a1c25b | 1715 | ---------------------------------------- |
1716 | -- Make_Disp_Asynchronous_Select_Body -- | |
1717 | ---------------------------------------- | |
ee6ba406 | 1718 | |
cdb1c38f | 1719 | -- For interface types, generate: |
1720 | ||
1721 | -- procedure _Disp_Asynchronous_Select | |
1722 | -- (T : in out <Typ>; | |
1723 | -- S : Integer; | |
1724 | -- P : System.Address; | |
1725 | -- B : out System.Storage_Elements.Dummy_Communication_Block; | |
1726 | -- F : out Boolean) | |
1727 | -- is | |
1728 | -- begin | |
1729 | -- null; | |
1730 | -- end _Disp_Asynchronous_Select; | |
1731 | ||
1732 | -- For protected types, generate: | |
1733 | ||
1734 | -- procedure _Disp_Asynchronous_Select | |
1735 | -- (T : in out <Typ>; | |
1736 | -- S : Integer; | |
1737 | -- P : System.Address; | |
1738 | -- B : out System.Storage_Elements.Dummy_Communication_Block; | |
1739 | -- F : out Boolean) | |
1740 | -- is | |
1741 | -- I : Integer := | |
1742 | -- Ada.Tags.Get_Entry_Index (Ada.Tags.Tag (<Typ>VP, S)); | |
1743 | -- Bnn : System.Tasking.Protected_Objects.Operations. | |
1744 | -- Communication_Block; | |
1745 | -- begin | |
1746 | -- System.Tasking.Protected_Objects.Operations.Protected_Entry_Call | |
1747 | -- (T._object'Access, | |
1748 | -- System.Tasking.Protected_Objects.Protected_Entry_Index (I), | |
1749 | -- P, | |
1750 | -- System.Tasking.Asynchronous_Call, | |
1751 | -- Bnn); | |
1752 | -- B := System.Storage_Elements.Dummy_Communication_Block (Bnn); | |
1753 | -- end _Disp_Asynchronous_Select; | |
1754 | ||
1755 | -- For task types, generate: | |
1756 | ||
1757 | -- procedure _Disp_Asynchronous_Select | |
1758 | -- (T : in out <Typ>; | |
1759 | -- S : Integer; | |
1760 | -- P : System.Address; | |
1761 | -- B : out System.Storage_Elements.Dummy_Communication_Block; | |
1762 | -- F : out Boolean) | |
1763 | -- is | |
1764 | -- I : Integer := | |
1765 | -- Ada.Tags.Get_Entry_Index (Ada.Tags.Tag (<Typ>VP, S)); | |
1766 | -- begin | |
1767 | -- System.Tasking.Rendezvous.Task_Entry_Call | |
1768 | -- (T._task_id, | |
1769 | -- System.Tasking.Task_Entry_Index (I), | |
1770 | -- P, | |
1771 | -- System.Tasking.Asynchronous_Call, | |
1772 | -- F); | |
1773 | -- end _Disp_Asynchronous_Select; | |
1774 | ||
76a1c25b | 1775 | function Make_Disp_Asynchronous_Select_Body |
1776 | (Typ : Entity_Id) return Node_Id | |
1777 | is | |
725a69d2 | 1778 | Com_Block : Entity_Id; |
1779 | Conc_Typ : Entity_Id := Empty; | |
1780 | Decls : constant List_Id := New_List; | |
1781 | DT_Ptr : Entity_Id; | |
1782 | Loc : constant Source_Ptr := Sloc (Typ); | |
acf97c11 | 1783 | Obj_Ref : Node_Id; |
725a69d2 | 1784 | Stmts : constant List_Id := New_List; |
ee6ba406 | 1785 | |
1786 | begin | |
68f95949 | 1787 | pragma Assert (not Restriction_Active (No_Dispatching_Calls)); |
1788 | ||
952af0b9 | 1789 | -- Null body is generated for interface types |
1790 | ||
76a1c25b | 1791 | if Is_Interface (Typ) then |
1792 | return | |
1793 | Make_Subprogram_Body (Loc, | |
1794 | Specification => | |
1795 | Make_Disp_Asynchronous_Select_Spec (Typ), | |
1796 | Declarations => | |
1797 | New_List, | |
1798 | Handled_Statement_Sequence => | |
1799 | Make_Handled_Sequence_Of_Statements (Loc, | |
1800 | New_List (Make_Null_Statement (Loc)))); | |
9dfe12ae | 1801 | end if; |
1802 | ||
76a1c25b | 1803 | DT_Ptr := Node (First_Elmt (Access_Disp_Table (Typ))); |
aad6babd | 1804 | |
952af0b9 | 1805 | if Is_Concurrent_Record_Type (Typ) then |
1806 | Conc_Typ := Corresponding_Concurrent_Type (Typ); | |
aad6babd | 1807 | |
76a1c25b | 1808 | -- Generate: |
cdb1c38f | 1809 | -- I : Integer := |
1810 | -- Ada.Tags.Get_Entry_Index (Ada.Tags.Tag! (<type>VP), S); | |
aad6babd | 1811 | |
76a1c25b | 1812 | -- where I will be used to capture the entry index of the primitive |
1813 | -- wrapper at position S. | |
aad6babd | 1814 | |
76a1c25b | 1815 | Append_To (Decls, |
1816 | Make_Object_Declaration (Loc, | |
1817 | Defining_Identifier => | |
1818 | Make_Defining_Identifier (Loc, Name_uI), | |
1819 | Object_Definition => | |
1820 | New_Reference_To (Standard_Integer, Loc), | |
1821 | Expression => | |
725a69d2 | 1822 | Make_Function_Call (Loc, |
cdb1c38f | 1823 | Name => |
1824 | New_Reference_To (RTE (RE_Get_Entry_Index), Loc), | |
1825 | Parameter_Associations => | |
1826 | New_List ( | |
1827 | Unchecked_Convert_To (RTE (RE_Tag), | |
1828 | New_Reference_To (DT_Ptr, Loc)), | |
1829 | Make_Identifier (Loc, Name_uS))))); | |
aad6babd | 1830 | |
76a1c25b | 1831 | if Ekind (Conc_Typ) = E_Protected_Type then |
aad6babd | 1832 | |
725a69d2 | 1833 | -- Generate: |
cdb1c38f | 1834 | -- Bnn : Communication_Block; |
725a69d2 | 1835 | |
1836 | Com_Block := | |
1837 | Make_Defining_Identifier (Loc, New_Internal_Name ('B')); | |
1838 | ||
1839 | Append_To (Decls, | |
1840 | Make_Object_Declaration (Loc, | |
1841 | Defining_Identifier => | |
1842 | Com_Block, | |
1843 | Object_Definition => | |
1844 | New_Reference_To (RTE (RE_Communication_Block), Loc))); | |
1845 | ||
acf97c11 | 1846 | -- Build T._object'Access for calls below |
aad6babd | 1847 | |
acf97c11 | 1848 | Obj_Ref := |
1849 | Make_Attribute_Reference (Loc, | |
1850 | Attribute_Name => Name_Unchecked_Access, | |
1851 | Prefix => | |
1852 | Make_Selected_Component (Loc, | |
1853 | Prefix => Make_Identifier (Loc, Name_uT), | |
1854 | Selector_Name => Make_Identifier (Loc, Name_uObject))); | |
aad6babd | 1855 | |
acf97c11 | 1856 | case Corresponding_Runtime_Package (Conc_Typ) is |
1857 | when System_Tasking_Protected_Objects_Entries => | |
aad6babd | 1858 | |
acf97c11 | 1859 | -- Generate: |
1860 | -- Protected_Entry_Call | |
1861 | -- (T._object'Access, -- Object | |
1862 | -- Protected_Entry_Index! (I), -- E | |
1863 | -- P, -- Uninterpreted_Data | |
1864 | -- Asynchronous_Call, -- Mode | |
1865 | -- Bnn); -- Communication_Block | |
1866 | ||
1867 | -- where T is the protected object, I is the entry index, P | |
1868 | -- is the wrapped parameters and B is the name of the | |
1869 | -- communication block. | |
1870 | ||
1871 | Append_To (Stmts, | |
1872 | Make_Procedure_Call_Statement (Loc, | |
1873 | Name => | |
1874 | New_Reference_To (RTE (RE_Protected_Entry_Call), Loc), | |
1875 | Parameter_Associations => | |
1876 | New_List ( | |
1877 | Obj_Ref, | |
aad6babd | 1878 | |
acf97c11 | 1879 | Make_Unchecked_Type_Conversion (Loc, -- entry index |
1880 | Subtype_Mark => | |
1881 | New_Reference_To | |
1882 | (RTE (RE_Protected_Entry_Index), Loc), | |
1883 | Expression => Make_Identifier (Loc, Name_uI)), | |
d62940bf | 1884 | |
acf97c11 | 1885 | Make_Identifier (Loc, Name_uP), -- parameter block |
1886 | New_Reference_To ( -- Asynchronous_Call | |
1887 | RTE (RE_Asynchronous_Call), Loc), | |
1888 | ||
1889 | New_Reference_To (Com_Block, Loc)))); -- comm block | |
1890 | ||
1891 | when System_Tasking_Protected_Objects_Single_Entry => | |
1892 | ||
1893 | -- Generate: | |
1894 | -- procedure Protected_Single_Entry_Call | |
1895 | -- (Object : Protection_Entry_Access; | |
1896 | -- Uninterpreted_Data : System.Address; | |
1897 | -- Mode : Call_Modes); | |
725a69d2 | 1898 | |
acf97c11 | 1899 | Append_To (Stmts, |
1900 | Make_Procedure_Call_Statement (Loc, | |
1901 | Name => | |
1902 | New_Reference_To | |
1903 | (RTE (RE_Protected_Single_Entry_Call), Loc), | |
1904 | Parameter_Associations => | |
1905 | New_List ( | |
1906 | Obj_Ref, | |
1907 | ||
1908 | Make_Attribute_Reference (Loc, | |
1909 | Prefix => Make_Identifier (Loc, Name_uP), | |
1910 | Attribute_Name => Name_Address), | |
1911 | ||
1912 | New_Reference_To | |
1913 | (RTE (RE_Asynchronous_Call), Loc)))); | |
1914 | ||
1915 | when others => | |
1916 | raise Program_Error; | |
1917 | end case; | |
725a69d2 | 1918 | |
1919 | -- Generate: | |
cdb1c38f | 1920 | -- B := Dummy_Communication_Block (Bnn); |
725a69d2 | 1921 | |
1922 | Append_To (Stmts, | |
1923 | Make_Assignment_Statement (Loc, | |
1924 | Name => | |
1925 | Make_Identifier (Loc, Name_uB), | |
1926 | Expression => | |
1927 | Make_Unchecked_Type_Conversion (Loc, | |
1928 | Subtype_Mark => | |
1929 | New_Reference_To ( | |
1930 | RTE (RE_Dummy_Communication_Block), Loc), | |
1931 | Expression => | |
1932 | New_Reference_To (Com_Block, Loc)))); | |
1933 | ||
76a1c25b | 1934 | else |
1935 | pragma Assert (Ekind (Conc_Typ) = E_Task_Type); | |
d62940bf | 1936 | |
76a1c25b | 1937 | -- Generate: |
cdb1c38f | 1938 | -- Task_Entry_Call |
1939 | -- (T._task_id, -- Acceptor | |
1940 | -- Task_Entry_Index! (I), -- E | |
1941 | -- P, -- Uninterpreted_Data | |
1942 | -- Asynchronous_Call, -- Mode | |
1943 | -- F); -- Rendezvous_Successful | |
ee6ba406 | 1944 | |
acf97c11 | 1945 | -- where T is the task object, I is the entry index, P is the |
76a1c25b | 1946 | -- wrapped parameters and F is the status flag. |
ee6ba406 | 1947 | |
76a1c25b | 1948 | Append_To (Stmts, |
1949 | Make_Procedure_Call_Statement (Loc, | |
1950 | Name => | |
1951 | New_Reference_To (RTE (RE_Task_Entry_Call), Loc), | |
1952 | Parameter_Associations => | |
1953 | New_List ( | |
76a1c25b | 1954 | Make_Selected_Component (Loc, -- T._task_id |
1955 | Prefix => | |
1956 | Make_Identifier (Loc, Name_uT), | |
1957 | Selector_Name => | |
1958 | Make_Identifier (Loc, Name_uTask_Id)), | |
ee6ba406 | 1959 | |
76a1c25b | 1960 | Make_Unchecked_Type_Conversion (Loc, -- entry index |
1961 | Subtype_Mark => | |
1962 | New_Reference_To (RTE (RE_Task_Entry_Index), Loc), | |
1963 | Expression => | |
1964 | Make_Identifier (Loc, Name_uI)), | |
ee6ba406 | 1965 | |
76a1c25b | 1966 | Make_Identifier (Loc, Name_uP), -- parameter block |
1967 | New_Reference_To ( -- Asynchronous_Call | |
1968 | RTE (RE_Asynchronous_Call), Loc), | |
1969 | Make_Identifier (Loc, Name_uF)))); -- status flag | |
1970 | end if; | |
7c949aad | 1971 | |
1972 | else | |
1973 | -- Ensure that the statements list is non-empty | |
1974 | ||
1975 | Append_To (Stmts, Make_Null_Statement (Loc)); | |
76a1c25b | 1976 | end if; |
ee6ba406 | 1977 | |
76a1c25b | 1978 | return |
1979 | Make_Subprogram_Body (Loc, | |
1980 | Specification => | |
1981 | Make_Disp_Asynchronous_Select_Spec (Typ), | |
1982 | Declarations => | |
1983 | Decls, | |
1984 | Handled_Statement_Sequence => | |
1985 | Make_Handled_Sequence_Of_Statements (Loc, Stmts)); | |
1986 | end Make_Disp_Asynchronous_Select_Body; | |
ee6ba406 | 1987 | |
76a1c25b | 1988 | ---------------------------------------- |
1989 | -- Make_Disp_Asynchronous_Select_Spec -- | |
1990 | ---------------------------------------- | |
ee6ba406 | 1991 | |
76a1c25b | 1992 | function Make_Disp_Asynchronous_Select_Spec |
1993 | (Typ : Entity_Id) return Node_Id | |
1994 | is | |
1995 | Loc : constant Source_Ptr := Sloc (Typ); | |
1996 | Def_Id : constant Node_Id := | |
1997 | Make_Defining_Identifier (Loc, | |
1998 | Name_uDisp_Asynchronous_Select); | |
1999 | Params : constant List_Id := New_List; | |
ee6ba406 | 2000 | |
76a1c25b | 2001 | begin |
68f95949 | 2002 | pragma Assert (not Restriction_Active (No_Dispatching_Calls)); |
2003 | ||
725a69d2 | 2004 | -- T : in out Typ; -- Object parameter |
2005 | -- S : Integer; -- Primitive operation slot | |
2006 | -- P : Address; -- Wrapped parameters | |
2007 | -- B : out Dummy_Communication_Block; -- Communication block dummy | |
2008 | -- F : out Boolean; -- Status flag | |
ee6ba406 | 2009 | |
725a69d2 | 2010 | Append_List_To (Params, New_List ( |
2011 | ||
2012 | Make_Parameter_Specification (Loc, | |
2013 | Defining_Identifier => | |
2014 | Make_Defining_Identifier (Loc, Name_uT), | |
2015 | Parameter_Type => | |
2016 | New_Reference_To (Typ, Loc), | |
2017 | In_Present => True, | |
2018 | Out_Present => True), | |
2019 | ||
2020 | Make_Parameter_Specification (Loc, | |
2021 | Defining_Identifier => | |
2022 | Make_Defining_Identifier (Loc, Name_uS), | |
2023 | Parameter_Type => | |
2024 | New_Reference_To (Standard_Integer, Loc)), | |
2025 | ||
2026 | Make_Parameter_Specification (Loc, | |
2027 | Defining_Identifier => | |
2028 | Make_Defining_Identifier (Loc, Name_uP), | |
2029 | Parameter_Type => | |
2030 | New_Reference_To (RTE (RE_Address), Loc)), | |
2031 | ||
2032 | Make_Parameter_Specification (Loc, | |
2033 | Defining_Identifier => | |
2034 | Make_Defining_Identifier (Loc, Name_uB), | |
2035 | Parameter_Type => | |
2036 | New_Reference_To (RTE (RE_Dummy_Communication_Block), Loc), | |
2037 | Out_Present => True), | |
ee6ba406 | 2038 | |
725a69d2 | 2039 | Make_Parameter_Specification (Loc, |
2040 | Defining_Identifier => | |
2041 | Make_Defining_Identifier (Loc, Name_uF), | |
2042 | Parameter_Type => | |
2043 | New_Reference_To (Standard_Boolean, Loc), | |
2044 | Out_Present => True))); | |
7189d17f | 2045 | |
76a1c25b | 2046 | return |
725a69d2 | 2047 | Make_Procedure_Specification (Loc, |
2048 | Defining_Unit_Name => Def_Id, | |
2049 | Parameter_Specifications => Params); | |
76a1c25b | 2050 | end Make_Disp_Asynchronous_Select_Spec; |
ee6ba406 | 2051 | |
76a1c25b | 2052 | --------------------------------------- |
2053 | -- Make_Disp_Conditional_Select_Body -- | |
2054 | --------------------------------------- | |
ee6ba406 | 2055 | |
cdb1c38f | 2056 | -- For interface types, generate: |
2057 | ||
2058 | -- procedure _Disp_Conditional_Select | |
2059 | -- (T : in out <Typ>; | |
2060 | -- S : Integer; | |
2061 | -- P : System.Address; | |
2062 | -- C : out Ada.Tags.Prim_Op_Kind; | |
2063 | -- F : out Boolean) | |
2064 | -- is | |
2065 | -- begin | |
2066 | -- null; | |
2067 | -- end _Disp_Conditional_Select; | |
2068 | ||
2069 | -- For protected types, generate: | |
2070 | ||
2071 | -- procedure _Disp_Conditional_Select | |
2072 | -- (T : in out <Typ>; | |
2073 | -- S : Integer; | |
2074 | -- P : System.Address; | |
2075 | -- C : out Ada.Tags.Prim_Op_Kind; | |
2076 | -- F : out Boolean) | |
2077 | -- is | |
2078 | -- I : Integer; | |
2079 | -- Bnn : System.Tasking.Protected_Objects.Operations. | |
2080 | -- Communication_Block; | |
2081 | ||
2082 | -- begin | |
2083 | -- C := Ada.Tags.Get_Prim_Op_Kind (Ada.Tags.Tag (<Typ>VP, S)); | |
2084 | ||
2085 | -- if C = Ada.Tags.POK_Procedure | |
2086 | -- or else C = Ada.Tags.POK_Protected_Procedure | |
2087 | -- or else C = Ada.Tags.POK_Task_Procedure | |
2088 | -- then | |
2089 | -- F := True; | |
2090 | -- return; | |
2091 | -- end if; | |
2092 | ||
2093 | -- I := Ada.Tags.Get_Entry_Index (Ada.Tags.Tag (<Typ>VP, S)); | |
2094 | -- System.Tasking.Protected_Objects.Operations.Protected_Entry_Call | |
2095 | -- (T.object'Access, | |
2096 | -- System.Tasking.Protected_Objects.Protected_Entry_Index (I), | |
2097 | -- P, | |
2098 | -- System.Tasking.Conditional_Call, | |
2099 | -- Bnn); | |
2100 | -- F := not Cancelled (Bnn); | |
2101 | -- end _Disp_Conditional_Select; | |
2102 | ||
2103 | -- For task types, generate: | |
2104 | ||
2105 | -- procedure _Disp_Conditional_Select | |
2106 | -- (T : in out <Typ>; | |
2107 | -- S : Integer; | |
2108 | -- P : System.Address; | |
2109 | -- C : out Ada.Tags.Prim_Op_Kind; | |
2110 | -- F : out Boolean) | |
2111 | -- is | |
2112 | -- I : Integer; | |
2113 | ||
2114 | -- begin | |
2115 | -- I := Ada.Tags.Get_Entry_Index (Ada.Tags.Tag (<Typ>VP, S)); | |
2116 | -- System.Tasking.Rendezvous.Task_Entry_Call | |
2117 | -- (T._task_id, | |
2118 | -- System.Tasking.Task_Entry_Index (I), | |
2119 | -- P, | |
2120 | -- System.Tasking.Conditional_Call, | |
2121 | -- F); | |
2122 | -- end _Disp_Conditional_Select; | |
2123 | ||
76a1c25b | 2124 | function Make_Disp_Conditional_Select_Body |
2125 | (Typ : Entity_Id) return Node_Id | |
2126 | is | |
2127 | Loc : constant Source_Ptr := Sloc (Typ); | |
2128 | Blk_Nam : Entity_Id; | |
2129 | Conc_Typ : Entity_Id := Empty; | |
2130 | Decls : constant List_Id := New_List; | |
2131 | DT_Ptr : Entity_Id; | |
acf97c11 | 2132 | Obj_Ref : Node_Id; |
76a1c25b | 2133 | Stmts : constant List_Id := New_List; |
ee6ba406 | 2134 | |
76a1c25b | 2135 | begin |
68f95949 | 2136 | pragma Assert (not Restriction_Active (No_Dispatching_Calls)); |
2137 | ||
952af0b9 | 2138 | -- Null body is generated for interface types |
2139 | ||
76a1c25b | 2140 | if Is_Interface (Typ) then |
2141 | return | |
2142 | Make_Subprogram_Body (Loc, | |
2143 | Specification => | |
2144 | Make_Disp_Conditional_Select_Spec (Typ), | |
2145 | Declarations => | |
2146 | No_List, | |
2147 | Handled_Statement_Sequence => | |
2148 | Make_Handled_Sequence_Of_Statements (Loc, | |
2149 | New_List (Make_Null_Statement (Loc)))); | |
2150 | end if; | |
ee6ba406 | 2151 | |
76a1c25b | 2152 | DT_Ptr := Node (First_Elmt (Access_Disp_Table (Typ))); |
ee6ba406 | 2153 | |
952af0b9 | 2154 | if Is_Concurrent_Record_Type (Typ) then |
2155 | Conc_Typ := Corresponding_Concurrent_Type (Typ); | |
ee6ba406 | 2156 | |
76a1c25b | 2157 | -- Generate: |
2158 | -- I : Integer; | |
ee6ba406 | 2159 | |
76a1c25b | 2160 | -- where I will be used to capture the entry index of the primitive |
2161 | -- wrapper at position S. | |
ee6ba406 | 2162 | |
76a1c25b | 2163 | Append_To (Decls, |
2164 | Make_Object_Declaration (Loc, | |
2165 | Defining_Identifier => | |
2166 | Make_Defining_Identifier (Loc, Name_uI), | |
2167 | Object_Definition => | |
2168 | New_Reference_To (Standard_Integer, Loc))); | |
ee6ba406 | 2169 | |
952af0b9 | 2170 | -- Generate: |
cdb1c38f | 2171 | -- C := Ada.Tags.Get_Prim_Op_Kind (Ada.Tags.Tag! (<type>VP), S); |
ee6ba406 | 2172 | |
952af0b9 | 2173 | -- if C = POK_Procedure |
2174 | -- or else C = POK_Protected_Procedure | |
2175 | -- or else C = POK_Task_Procedure; | |
2176 | -- then | |
2177 | -- F := True; | |
2178 | -- return; | |
2179 | -- end if; | |
aad6babd | 2180 | |
725a69d2 | 2181 | Build_Common_Dispatching_Select_Statements (Loc, DT_Ptr, Stmts); |
aad6babd | 2182 | |
76a1c25b | 2183 | -- Generate: |
2184 | -- Bnn : Communication_Block; | |
aad6babd | 2185 | |
cdb1c38f | 2186 | -- where Bnn is the name of the communication block used in the |
2187 | -- call to Protected_Entry_Call. | |
aad6babd | 2188 | |
76a1c25b | 2189 | Blk_Nam := Make_Defining_Identifier (Loc, New_Internal_Name ('B')); |
aad6babd | 2190 | |
76a1c25b | 2191 | Append_To (Decls, |
2192 | Make_Object_Declaration (Loc, | |
2193 | Defining_Identifier => | |
2194 | Blk_Nam, | |
2195 | Object_Definition => | |
2196 | New_Reference_To (RTE (RE_Communication_Block), Loc))); | |
aad6babd | 2197 | |
76a1c25b | 2198 | -- Generate: |
cdb1c38f | 2199 | -- I := Ada.Tags.Get_Entry_Index (Ada.Tags.Tag! (<type>VP), S); |
aad6babd | 2200 | |
76a1c25b | 2201 | -- I is the entry index and S is the dispatch table slot |
aad6babd | 2202 | |
76a1c25b | 2203 | Append_To (Stmts, |
2204 | Make_Assignment_Statement (Loc, | |
2205 | Name => | |
2206 | Make_Identifier (Loc, Name_uI), | |
2207 | Expression => | |
725a69d2 | 2208 | Make_Function_Call (Loc, |
cdb1c38f | 2209 | Name => |
2210 | New_Reference_To (RTE (RE_Get_Entry_Index), Loc), | |
2211 | Parameter_Associations => | |
2212 | New_List ( | |
2213 | Unchecked_Convert_To (RTE (RE_Tag), | |
2214 | New_Reference_To (DT_Ptr, Loc)), | |
2215 | Make_Identifier (Loc, Name_uS))))); | |
ee6ba406 | 2216 | |
76a1c25b | 2217 | if Ekind (Conc_Typ) = E_Protected_Type then |
ee6ba406 | 2218 | |
acf97c11 | 2219 | Obj_Ref := -- T._object'Access |
2220 | Make_Attribute_Reference (Loc, | |
2221 | Attribute_Name => Name_Unchecked_Access, | |
2222 | Prefix => | |
2223 | Make_Selected_Component (Loc, | |
2224 | Prefix => Make_Identifier (Loc, Name_uT), | |
2225 | Selector_Name => Make_Identifier (Loc, Name_uObject))); | |
ee6ba406 | 2226 | |
acf97c11 | 2227 | case Corresponding_Runtime_Package (Conc_Typ) is |
2228 | when System_Tasking_Protected_Objects_Entries => | |
2229 | -- Generate: | |
e1c20931 | 2230 | |
acf97c11 | 2231 | -- Protected_Entry_Call |
2232 | -- (T._object'Access, -- Object | |
2233 | -- Protected_Entry_Index! (I), -- E | |
2234 | -- P, -- Uninterpreted_Data | |
2235 | -- Conditional_Call, -- Mode | |
2236 | -- Bnn); -- Block | |
e1c20931 | 2237 | |
acf97c11 | 2238 | -- where T is the protected object, I is the entry index, P |
2239 | -- are the wrapped parameters and Bnn is the name of the | |
2240 | -- communication block. | |
d62940bf | 2241 | |
acf97c11 | 2242 | Append_To (Stmts, |
2243 | Make_Procedure_Call_Statement (Loc, | |
2244 | Name => | |
2245 | New_Reference_To (RTE (RE_Protected_Entry_Call), Loc), | |
2246 | Parameter_Associations => | |
2247 | New_List ( | |
2248 | Obj_Ref, | |
d62940bf | 2249 | |
acf97c11 | 2250 | Make_Unchecked_Type_Conversion (Loc, -- entry index |
2251 | Subtype_Mark => | |
2252 | New_Reference_To | |
2253 | (RTE (RE_Protected_Entry_Index), Loc), | |
2254 | Expression => Make_Identifier (Loc, Name_uI)), | |
2255 | ||
2256 | Make_Identifier (Loc, Name_uP), -- parameter block | |
2257 | ||
2258 | New_Reference_To ( -- Conditional_Call | |
2259 | RTE (RE_Conditional_Call), Loc), | |
2260 | New_Reference_To ( -- Bnn | |
2261 | Blk_Nam, Loc)))); | |
2262 | ||
2263 | when System_Tasking_Protected_Objects_Single_Entry => | |
2264 | ||
2265 | -- If we are compiling for a restricted run-time, the call | |
2266 | -- uses the simpler form. | |
2267 | ||
2268 | Append_To (Stmts, | |
2269 | Make_Procedure_Call_Statement (Loc, | |
2270 | Name => | |
2271 | New_Reference_To | |
2272 | (RTE (RE_Protected_Single_Entry_Call), Loc), | |
2273 | Parameter_Associations => | |
2274 | New_List ( | |
2275 | Obj_Ref, | |
2276 | ||
2277 | Make_Attribute_Reference (Loc, | |
2278 | Prefix => Make_Identifier (Loc, Name_uP), | |
2279 | Attribute_Name => Name_Address), | |
2280 | ||
2281 | New_Reference_To | |
2282 | (RTE (RE_Conditional_Call), Loc)))); | |
2283 | when others => | |
2284 | raise Program_Error; | |
2285 | end case; | |
d62940bf | 2286 | |
76a1c25b | 2287 | -- Generate: |
2288 | -- F := not Cancelled (Bnn); | |
e1c20931 | 2289 | |
76a1c25b | 2290 | -- where F is the success flag. The status of Cancelled is negated |
2291 | -- in order to match the behaviour of the version for task types. | |
e1c20931 | 2292 | |
76a1c25b | 2293 | Append_To (Stmts, |
2294 | Make_Assignment_Statement (Loc, | |
2295 | Name => | |
2296 | Make_Identifier (Loc, Name_uF), | |
2297 | Expression => | |
2298 | Make_Op_Not (Loc, | |
2299 | Right_Opnd => | |
2300 | Make_Function_Call (Loc, | |
2301 | Name => | |
2302 | New_Reference_To (RTE (RE_Cancelled), Loc), | |
2303 | Parameter_Associations => | |
2304 | New_List ( | |
2305 | New_Reference_To (Blk_Nam, Loc)))))); | |
2306 | else | |
2307 | pragma Assert (Ekind (Conc_Typ) = E_Task_Type); | |
d62940bf | 2308 | |
76a1c25b | 2309 | -- Generate: |
cdb1c38f | 2310 | -- Task_Entry_Call |
2311 | -- (T._task_id, -- Acceptor | |
2312 | -- Task_Entry_Index! (I), -- E | |
2313 | -- P, -- Uninterpreted_Data | |
2314 | -- Conditional_Call, -- Mode | |
2315 | -- F); -- Rendezvous_Successful | |
d62940bf | 2316 | |
76a1c25b | 2317 | -- where T is the task object, I is the entry index, P are the |
2318 | -- wrapped parameters and F is the status flag. | |
e1c20931 | 2319 | |
76a1c25b | 2320 | Append_To (Stmts, |
2321 | Make_Procedure_Call_Statement (Loc, | |
2322 | Name => | |
2323 | New_Reference_To (RTE (RE_Task_Entry_Call), Loc), | |
2324 | Parameter_Associations => | |
2325 | New_List ( | |
2326 | ||
2327 | Make_Selected_Component (Loc, -- T._task_id | |
2328 | Prefix => | |
2329 | Make_Identifier (Loc, Name_uT), | |
2330 | Selector_Name => | |
2331 | Make_Identifier (Loc, Name_uTask_Id)), | |
2332 | ||
2333 | Make_Unchecked_Type_Conversion (Loc, -- entry index | |
2334 | Subtype_Mark => | |
2335 | New_Reference_To (RTE (RE_Task_Entry_Index), Loc), | |
2336 | Expression => | |
2337 | Make_Identifier (Loc, Name_uI)), | |
2338 | ||
2339 | Make_Identifier (Loc, Name_uP), -- parameter block | |
2340 | New_Reference_To ( -- Conditional_Call | |
2341 | RTE (RE_Conditional_Call), Loc), | |
2342 | Make_Identifier (Loc, Name_uF)))); -- status flag | |
d62940bf | 2343 | end if; |
7c949aad | 2344 | |
2345 | else | |
2346 | -- Ensure that the statements list is non-empty | |
2347 | ||
2348 | Append_To (Stmts, Make_Null_Statement (Loc)); | |
76a1c25b | 2349 | end if; |
2350 | ||
2351 | return | |
2352 | Make_Subprogram_Body (Loc, | |
2353 | Specification => | |
2354 | Make_Disp_Conditional_Select_Spec (Typ), | |
2355 | Declarations => | |
2356 | Decls, | |
2357 | Handled_Statement_Sequence => | |
2358 | Make_Handled_Sequence_Of_Statements (Loc, Stmts)); | |
2359 | end Make_Disp_Conditional_Select_Body; | |
2360 | ||
2361 | --------------------------------------- | |
2362 | -- Make_Disp_Conditional_Select_Spec -- | |
2363 | --------------------------------------- | |
2364 | ||
2365 | function Make_Disp_Conditional_Select_Spec | |
2366 | (Typ : Entity_Id) return Node_Id | |
2367 | is | |
2368 | Loc : constant Source_Ptr := Sloc (Typ); | |
2369 | Def_Id : constant Node_Id := | |
2370 | Make_Defining_Identifier (Loc, | |
2371 | Name_uDisp_Conditional_Select); | |
2372 | Params : constant List_Id := New_List; | |
2373 | ||
2374 | begin | |
68f95949 | 2375 | pragma Assert (not Restriction_Active (No_Dispatching_Calls)); |
2376 | ||
725a69d2 | 2377 | -- T : in out Typ; -- Object parameter |
2378 | -- S : Integer; -- Primitive operation slot | |
2379 | -- P : Address; -- Wrapped parameters | |
2380 | -- C : out Prim_Op_Kind; -- Call kind | |
2381 | -- F : out Boolean; -- Status flag | |
2382 | ||
2383 | Append_List_To (Params, New_List ( | |
2384 | ||
2385 | Make_Parameter_Specification (Loc, | |
2386 | Defining_Identifier => | |
2387 | Make_Defining_Identifier (Loc, Name_uT), | |
2388 | Parameter_Type => | |
2389 | New_Reference_To (Typ, Loc), | |
2390 | In_Present => True, | |
2391 | Out_Present => True), | |
2392 | ||
2393 | Make_Parameter_Specification (Loc, | |
2394 | Defining_Identifier => | |
2395 | Make_Defining_Identifier (Loc, Name_uS), | |
2396 | Parameter_Type => | |
2397 | New_Reference_To (Standard_Integer, Loc)), | |
2398 | ||
2399 | Make_Parameter_Specification (Loc, | |
2400 | Defining_Identifier => | |
2401 | Make_Defining_Identifier (Loc, Name_uP), | |
2402 | Parameter_Type => | |
2403 | New_Reference_To (RTE (RE_Address), Loc)), | |
76a1c25b | 2404 | |
725a69d2 | 2405 | Make_Parameter_Specification (Loc, |
2406 | Defining_Identifier => | |
2407 | Make_Defining_Identifier (Loc, Name_uC), | |
2408 | Parameter_Type => | |
2409 | New_Reference_To (RTE (RE_Prim_Op_Kind), Loc), | |
2410 | Out_Present => True), | |
76a1c25b | 2411 | |
725a69d2 | 2412 | Make_Parameter_Specification (Loc, |
2413 | Defining_Identifier => | |
2414 | Make_Defining_Identifier (Loc, Name_uF), | |
2415 | Parameter_Type => | |
2416 | New_Reference_To (Standard_Boolean, Loc), | |
2417 | Out_Present => True))); | |
76a1c25b | 2418 | |
2419 | return | |
2420 | Make_Procedure_Specification (Loc, | |
2421 | Defining_Unit_Name => Def_Id, | |
2422 | Parameter_Specifications => Params); | |
2423 | end Make_Disp_Conditional_Select_Spec; | |
2424 | ||
2425 | ------------------------------------- | |
2426 | -- Make_Disp_Get_Prim_Op_Kind_Body -- | |
2427 | ------------------------------------- | |
2428 | ||
2429 | function Make_Disp_Get_Prim_Op_Kind_Body | |
2430 | (Typ : Entity_Id) return Node_Id | |
2431 | is | |
2432 | Loc : constant Source_Ptr := Sloc (Typ); | |
2433 | DT_Ptr : Entity_Id; | |
2434 | ||
2435 | begin | |
68f95949 | 2436 | pragma Assert (not Restriction_Active (No_Dispatching_Calls)); |
2437 | ||
76a1c25b | 2438 | if Is_Interface (Typ) then |
2439 | return | |
2440 | Make_Subprogram_Body (Loc, | |
2441 | Specification => | |
2442 | Make_Disp_Get_Prim_Op_Kind_Spec (Typ), | |
2443 | Declarations => | |
2444 | New_List, | |
2445 | Handled_Statement_Sequence => | |
2446 | Make_Handled_Sequence_Of_Statements (Loc, | |
2447 | New_List (Make_Null_Statement (Loc)))); | |
e1c20931 | 2448 | end if; |
2449 | ||
76a1c25b | 2450 | DT_Ptr := Node (First_Elmt (Access_Disp_Table (Typ))); |
2451 | ||
d62940bf | 2452 | -- Generate: |
76a1c25b | 2453 | -- C := get_prim_op_kind (tag! (<type>VP), S); |
ee6ba406 | 2454 | |
76a1c25b | 2455 | -- where C is the out parameter capturing the call kind and S is the |
2456 | -- dispatch table slot number. | |
ee6ba406 | 2457 | |
76a1c25b | 2458 | return |
2459 | Make_Subprogram_Body (Loc, | |
2460 | Specification => | |
2461 | Make_Disp_Get_Prim_Op_Kind_Spec (Typ), | |
2462 | Declarations => | |
2463 | New_List, | |
2464 | Handled_Statement_Sequence => | |
2465 | Make_Handled_Sequence_Of_Statements (Loc, | |
2466 | New_List ( | |
2467 | Make_Assignment_Statement (Loc, | |
2468 | Name => | |
2469 | Make_Identifier (Loc, Name_uC), | |
2470 | Expression => | |
725a69d2 | 2471 | Make_Function_Call (Loc, |
2472 | Name => | |
2473 | New_Reference_To (RTE (RE_Get_Prim_Op_Kind), Loc), | |
2474 | Parameter_Associations => New_List ( | |
2475 | Unchecked_Convert_To (RTE (RE_Tag), | |
2476 | New_Reference_To (DT_Ptr, Loc)), | |
2477 | Make_Identifier (Loc, Name_uS))))))); | |
76a1c25b | 2478 | end Make_Disp_Get_Prim_Op_Kind_Body; |
e1c20931 | 2479 | |
76a1c25b | 2480 | ------------------------------------- |
2481 | -- Make_Disp_Get_Prim_Op_Kind_Spec -- | |
2482 | ------------------------------------- | |
e1c20931 | 2483 | |
76a1c25b | 2484 | function Make_Disp_Get_Prim_Op_Kind_Spec |
2485 | (Typ : Entity_Id) return Node_Id | |
2486 | is | |
2487 | Loc : constant Source_Ptr := Sloc (Typ); | |
2488 | Def_Id : constant Node_Id := | |
2489 | Make_Defining_Identifier (Loc, | |
2490 | Name_uDisp_Get_Prim_Op_Kind); | |
2491 | Params : constant List_Id := New_List; | |
e1c20931 | 2492 | |
76a1c25b | 2493 | begin |
68f95949 | 2494 | pragma Assert (not Restriction_Active (No_Dispatching_Calls)); |
2495 | ||
725a69d2 | 2496 | -- T : in out Typ; -- Object parameter |
2497 | -- S : Integer; -- Primitive operation slot | |
2498 | -- C : out Prim_Op_Kind; -- Call kind | |
2499 | ||
2500 | Append_List_To (Params, New_List ( | |
2501 | ||
2502 | Make_Parameter_Specification (Loc, | |
2503 | Defining_Identifier => | |
2504 | Make_Defining_Identifier (Loc, Name_uT), | |
2505 | Parameter_Type => | |
2506 | New_Reference_To (Typ, Loc), | |
2507 | In_Present => True, | |
2508 | Out_Present => True), | |
ee6ba406 | 2509 | |
725a69d2 | 2510 | Make_Parameter_Specification (Loc, |
2511 | Defining_Identifier => | |
2512 | Make_Defining_Identifier (Loc, Name_uS), | |
2513 | Parameter_Type => | |
2514 | New_Reference_To (Standard_Integer, Loc)), | |
ee6ba406 | 2515 | |
725a69d2 | 2516 | Make_Parameter_Specification (Loc, |
2517 | Defining_Identifier => | |
2518 | Make_Defining_Identifier (Loc, Name_uC), | |
2519 | Parameter_Type => | |
2520 | New_Reference_To (RTE (RE_Prim_Op_Kind), Loc), | |
2521 | Out_Present => True))); | |
76a1c25b | 2522 | |
2523 | return | |
2524 | Make_Procedure_Specification (Loc, | |
2525 | Defining_Unit_Name => Def_Id, | |
2526 | Parameter_Specifications => Params); | |
2527 | end Make_Disp_Get_Prim_Op_Kind_Spec; | |
2528 | ||
2529 | -------------------------------- | |
2530 | -- Make_Disp_Get_Task_Id_Body -- | |
2531 | -------------------------------- | |
2532 | ||
2533 | function Make_Disp_Get_Task_Id_Body | |
2534 | (Typ : Entity_Id) return Node_Id | |
2535 | is | |
2536 | Loc : constant Source_Ptr := Sloc (Typ); | |
2537 | Ret : Node_Id; | |
2538 | ||
2539 | begin | |
68f95949 | 2540 | pragma Assert (not Restriction_Active (No_Dispatching_Calls)); |
2541 | ||
76a1c25b | 2542 | if Is_Concurrent_Record_Type (Typ) |
2543 | and then Ekind (Corresponding_Concurrent_Type (Typ)) = E_Task_Type | |
2544 | then | |
725a69d2 | 2545 | -- Generate: |
2546 | -- return To_Address (_T._task_id); | |
2547 | ||
76a1c25b | 2548 | Ret := |
17e14451 | 2549 | Make_Simple_Return_Statement (Loc, |
76a1c25b | 2550 | Expression => |
725a69d2 | 2551 | Make_Unchecked_Type_Conversion (Loc, |
2552 | Subtype_Mark => | |
2553 | New_Reference_To (RTE (RE_Address), Loc), | |
2554 | Expression => | |
2555 | Make_Selected_Component (Loc, | |
2556 | Prefix => | |
2557 | Make_Identifier (Loc, Name_uT), | |
2558 | Selector_Name => | |
2559 | Make_Identifier (Loc, Name_uTask_Id)))); | |
76a1c25b | 2560 | |
2561 | -- A null body is constructed for non-task types | |
2562 | ||
2563 | else | |
725a69d2 | 2564 | -- Generate: |
2565 | -- return Null_Address; | |
2566 | ||
76a1c25b | 2567 | Ret := |
17e14451 | 2568 | Make_Simple_Return_Statement (Loc, |
76a1c25b | 2569 | Expression => |
725a69d2 | 2570 | New_Reference_To (RTE (RE_Null_Address), Loc)); |
76a1c25b | 2571 | end if; |
2572 | ||
2573 | return | |
2574 | Make_Subprogram_Body (Loc, | |
2575 | Specification => | |
2576 | Make_Disp_Get_Task_Id_Spec (Typ), | |
2577 | Declarations => | |
2578 | New_List, | |
2579 | Handled_Statement_Sequence => | |
2580 | Make_Handled_Sequence_Of_Statements (Loc, | |
2581 | New_List (Ret))); | |
2582 | end Make_Disp_Get_Task_Id_Body; | |
2583 | ||
2584 | -------------------------------- | |
2585 | -- Make_Disp_Get_Task_Id_Spec -- | |
2586 | -------------------------------- | |
2587 | ||
2588 | function Make_Disp_Get_Task_Id_Spec | |
2589 | (Typ : Entity_Id) return Node_Id | |
2590 | is | |
725a69d2 | 2591 | Loc : constant Source_Ptr := Sloc (Typ); |
76a1c25b | 2592 | |
2593 | begin | |
68f95949 | 2594 | pragma Assert (not Restriction_Active (No_Dispatching_Calls)); |
2595 | ||
76a1c25b | 2596 | return |
2597 | Make_Function_Specification (Loc, | |
725a69d2 | 2598 | Defining_Unit_Name => |
2599 | Make_Defining_Identifier (Loc, Name_uDisp_Get_Task_Id), | |
76a1c25b | 2600 | Parameter_Specifications => New_List ( |
2601 | Make_Parameter_Specification (Loc, | |
2602 | Defining_Identifier => | |
2603 | Make_Defining_Identifier (Loc, Name_uT), | |
2604 | Parameter_Type => | |
2605 | New_Reference_To (Typ, Loc))), | |
2606 | Result_Definition => | |
725a69d2 | 2607 | New_Reference_To (RTE (RE_Address), Loc)); |
76a1c25b | 2608 | end Make_Disp_Get_Task_Id_Spec; |
2609 | ||
cdb1c38f | 2610 | ---------------------------- |
2611 | -- Make_Disp_Requeue_Body -- | |
2612 | ---------------------------- | |
2613 | ||
2614 | function Make_Disp_Requeue_Body | |
2615 | (Typ : Entity_Id) return Node_Id | |
2616 | is | |
2617 | Loc : constant Source_Ptr := Sloc (Typ); | |
2618 | Conc_Typ : Entity_Id := Empty; | |
2619 | Stmts : constant List_Id := New_List; | |
2620 | ||
2621 | begin | |
2622 | pragma Assert (not Restriction_Active (No_Dispatching_Calls)); | |
2623 | ||
2624 | -- Null body is generated for interface types and non-concurrent | |
2625 | -- tagged types. | |
2626 | ||
2627 | if Is_Interface (Typ) | |
2628 | or else not Is_Concurrent_Record_Type (Typ) | |
2629 | then | |
2630 | return | |
2631 | Make_Subprogram_Body (Loc, | |
2632 | Specification => | |
2633 | Make_Disp_Requeue_Spec (Typ), | |
2634 | Declarations => | |
2635 | No_List, | |
2636 | Handled_Statement_Sequence => | |
2637 | Make_Handled_Sequence_Of_Statements (Loc, | |
2638 | New_List (Make_Null_Statement (Loc)))); | |
2639 | end if; | |
2640 | ||
2641 | Conc_Typ := Corresponding_Concurrent_Type (Typ); | |
2642 | ||
2643 | if Ekind (Conc_Typ) = E_Protected_Type then | |
2644 | ||
2645 | -- Generate statements: | |
2646 | -- if F then | |
2647 | -- System.Tasking.Protected_Objects.Operations. | |
2648 | -- Requeue_Protected_Entry | |
2649 | -- (Protection_Entries_Access (P), | |
2650 | -- O._object'Unchecked_Access, | |
2651 | -- Protected_Entry_Index (I), | |
2652 | -- A); | |
2653 | -- else | |
2654 | -- System.Tasking.Protected_Objects.Operations. | |
2655 | -- Requeue_Task_To_Protected_Entry | |
2656 | -- (O._object'Unchecked_Access, | |
2657 | -- Protected_Entry_Index (I), | |
2658 | -- A); | |
2659 | -- end if; | |
2660 | ||
acf97c11 | 2661 | if Restriction_Active (No_Entry_Queue) then |
2662 | Append_To (Stmts, Make_Null_Statement (Loc)); | |
2663 | else | |
2664 | Append_To (Stmts, | |
2665 | Make_If_Statement (Loc, | |
2666 | Condition => | |
2667 | Make_Identifier (Loc, Name_uF), | |
cdb1c38f | 2668 | |
acf97c11 | 2669 | Then_Statements => |
2670 | New_List ( | |
cdb1c38f | 2671 | |
acf97c11 | 2672 | -- Call to Requeue_Protected_Entry |
cdb1c38f | 2673 | |
acf97c11 | 2674 | Make_Procedure_Call_Statement (Loc, |
2675 | Name => | |
2676 | New_Reference_To ( | |
2677 | RTE (RE_Requeue_Protected_Entry), Loc), | |
2678 | Parameter_Associations => | |
2679 | New_List ( | |
2680 | ||
2681 | Make_Unchecked_Type_Conversion (Loc, -- PEA (P) | |
2682 | Subtype_Mark => | |
2683 | New_Reference_To ( | |
2684 | RTE (RE_Protection_Entries_Access), Loc), | |
2685 | Expression => | |
2686 | Make_Identifier (Loc, Name_uP)), | |
2687 | ||
2688 | Make_Attribute_Reference (Loc, -- O._object'Acc | |
2689 | Attribute_Name => | |
2690 | Name_Unchecked_Access, | |
2691 | Prefix => | |
2692 | Make_Selected_Component (Loc, | |
2693 | Prefix => | |
2694 | Make_Identifier (Loc, Name_uO), | |
2695 | Selector_Name => | |
2696 | Make_Identifier (Loc, Name_uObject))), | |
2697 | ||
2698 | Make_Unchecked_Type_Conversion (Loc, -- entry index | |
2699 | Subtype_Mark => | |
2700 | New_Reference_To ( | |
2701 | RTE (RE_Protected_Entry_Index), Loc), | |
2702 | Expression => | |
2703 | Make_Identifier (Loc, Name_uI)), | |
cdb1c38f | 2704 | |
acf97c11 | 2705 | Make_Identifier (Loc, Name_uA)))), -- abort status |
cdb1c38f | 2706 | |
acf97c11 | 2707 | Else_Statements => |
2708 | New_List ( | |
cdb1c38f | 2709 | |
acf97c11 | 2710 | -- Call to Requeue_Task_To_Protected_Entry |
cdb1c38f | 2711 | |
acf97c11 | 2712 | Make_Procedure_Call_Statement (Loc, |
2713 | Name => | |
2714 | New_Reference_To ( | |
2715 | RTE (RE_Requeue_Task_To_Protected_Entry), Loc), | |
2716 | Parameter_Associations => | |
2717 | New_List ( | |
2718 | ||
2719 | Make_Attribute_Reference (Loc, -- O._object'Acc | |
2720 | Attribute_Name => | |
2721 | Name_Unchecked_Access, | |
2722 | Prefix => | |
2723 | Make_Selected_Component (Loc, | |
2724 | Prefix => | |
2725 | Make_Identifier (Loc, Name_uO), | |
2726 | Selector_Name => | |
2727 | Make_Identifier (Loc, Name_uObject))), | |
2728 | ||
2729 | Make_Unchecked_Type_Conversion (Loc, -- entry index | |
2730 | Subtype_Mark => | |
2731 | New_Reference_To ( | |
2732 | RTE (RE_Protected_Entry_Index), Loc), | |
2733 | Expression => | |
2734 | Make_Identifier (Loc, Name_uI)), | |
cdb1c38f | 2735 | |
acf97c11 | 2736 | Make_Identifier (Loc, Name_uA)))))); -- abort status |
2737 | end if; | |
cdb1c38f | 2738 | else |
2739 | pragma Assert (Is_Task_Type (Conc_Typ)); | |
2740 | ||
2741 | -- Generate: | |
2742 | -- if F then | |
2743 | -- System.Tasking.Rendezvous.Requeue_Protected_To_Task_Entry | |
2744 | -- (Protection_Entries_Access (P), | |
2745 | -- O._task_id, | |
2746 | -- Task_Entry_Index (I), | |
2747 | -- A); | |
2748 | -- else | |
2749 | -- System.Tasking.Rendezvous.Requeue_Task_Entry | |
2750 | -- (O._task_id, | |
2751 | -- Task_Entry_Index (I), | |
2752 | -- A); | |
2753 | -- end if; | |
2754 | ||
2755 | Append_To (Stmts, | |
2756 | Make_If_Statement (Loc, | |
2757 | Condition => | |
2758 | Make_Identifier (Loc, Name_uF), | |
2759 | ||
2760 | Then_Statements => | |
2761 | New_List ( | |
2762 | ||
2763 | -- Call to Requeue_Protected_To_Task_Entry | |
2764 | ||
2765 | Make_Procedure_Call_Statement (Loc, | |
2766 | Name => | |
2767 | New_Reference_To ( | |
2768 | RTE (RE_Requeue_Protected_To_Task_Entry), Loc), | |
2769 | ||
2770 | Parameter_Associations => | |
2771 | New_List ( | |
2772 | ||
2773 | Make_Unchecked_Type_Conversion (Loc, -- PEA (P) | |
2774 | Subtype_Mark => | |
2775 | New_Reference_To ( | |
2776 | RTE (RE_Protection_Entries_Access), Loc), | |
2777 | Expression => | |
2778 | Make_Identifier (Loc, Name_uP)), | |
2779 | ||
2780 | Make_Selected_Component (Loc, -- O._task_id | |
2781 | Prefix => | |
2782 | Make_Identifier (Loc, Name_uO), | |
2783 | Selector_Name => | |
2784 | Make_Identifier (Loc, Name_uTask_Id)), | |
2785 | ||
2786 | Make_Unchecked_Type_Conversion (Loc, -- entry index | |
2787 | Subtype_Mark => | |
2788 | New_Reference_To ( | |
2789 | RTE (RE_Task_Entry_Index), Loc), | |
2790 | Expression => | |
2791 | Make_Identifier (Loc, Name_uI)), | |
2792 | ||
2793 | Make_Identifier (Loc, Name_uA)))), -- abort status | |
2794 | ||
2795 | Else_Statements => | |
2796 | New_List ( | |
2797 | ||
2798 | -- Call to Requeue_Task_Entry | |
2799 | ||
2800 | Make_Procedure_Call_Statement (Loc, | |
2801 | Name => | |
2802 | New_Reference_To (RTE (RE_Requeue_Task_Entry), Loc), | |
2803 | ||
2804 | Parameter_Associations => | |
2805 | New_List ( | |
2806 | ||
2807 | Make_Selected_Component (Loc, -- O._task_id | |
2808 | Prefix => | |
2809 | Make_Identifier (Loc, Name_uO), | |
2810 | Selector_Name => | |
2811 | Make_Identifier (Loc, Name_uTask_Id)), | |
2812 | ||
2813 | Make_Unchecked_Type_Conversion (Loc, -- entry index | |
2814 | Subtype_Mark => | |
2815 | New_Reference_To ( | |
2816 | RTE (RE_Task_Entry_Index), Loc), | |
2817 | Expression => | |
2818 | Make_Identifier (Loc, Name_uI)), | |
2819 | ||
2820 | Make_Identifier (Loc, Name_uA)))))); -- abort status | |
2821 | end if; | |
2822 | ||
2823 | -- Even though no declarations are needed in both cases, we allocate | |
2824 | -- a list for entities added by Freeze. | |
2825 | ||
2826 | return | |
2827 | Make_Subprogram_Body (Loc, | |
2828 | Specification => | |
2829 | Make_Disp_Requeue_Spec (Typ), | |
2830 | Declarations => | |
2831 | New_List, | |
2832 | Handled_Statement_Sequence => | |
2833 | Make_Handled_Sequence_Of_Statements (Loc, Stmts)); | |
2834 | end Make_Disp_Requeue_Body; | |
2835 | ||
2836 | ---------------------------- | |
2837 | -- Make_Disp_Requeue_Spec -- | |
2838 | ---------------------------- | |
2839 | ||
2840 | function Make_Disp_Requeue_Spec | |
2841 | (Typ : Entity_Id) return Node_Id | |
2842 | is | |
2843 | Loc : constant Source_Ptr := Sloc (Typ); | |
2844 | ||
2845 | begin | |
2846 | pragma Assert (not Restriction_Active (No_Dispatching_Calls)); | |
2847 | ||
2848 | -- O : in out Typ; - Object parameter | |
2849 | -- F : Boolean; - Protected (True) / task (False) flag | |
2850 | -- P : Address; - Protection_Entries_Access value | |
2851 | -- I : Entry_Index - Index of entry call | |
2852 | -- A : Boolean - Abort flag | |
2853 | ||
2854 | -- Note that the Protection_Entries_Access value is represented as a | |
2855 | -- System.Address in order to avoid dragging in the tasking runtime | |
2856 | -- when compiling sources without tasking constructs. | |
2857 | ||
2858 | return | |
2859 | Make_Procedure_Specification (Loc, | |
2860 | Defining_Unit_Name => | |
2861 | Make_Defining_Identifier (Loc, Name_uDisp_Requeue), | |
2862 | ||
2863 | Parameter_Specifications => | |
2864 | New_List ( | |
2865 | ||
2866 | Make_Parameter_Specification (Loc, -- O | |
2867 | Defining_Identifier => | |
2868 | Make_Defining_Identifier (Loc, Name_uO), | |
2869 | Parameter_Type => | |
2870 | New_Reference_To (Typ, Loc), | |
2871 | In_Present => True, | |
2872 | Out_Present => True), | |
2873 | ||
2874 | Make_Parameter_Specification (Loc, -- F | |
2875 | Defining_Identifier => | |
2876 | Make_Defining_Identifier (Loc, Name_uF), | |
2877 | Parameter_Type => | |
2878 | New_Reference_To (Standard_Boolean, Loc)), | |
2879 | ||
2880 | Make_Parameter_Specification (Loc, -- P | |
2881 | Defining_Identifier => | |
2882 | Make_Defining_Identifier (Loc, Name_uP), | |
2883 | Parameter_Type => | |
2884 | New_Reference_To (RTE (RE_Address), Loc)), | |
2885 | ||
2886 | Make_Parameter_Specification (Loc, -- I | |
2887 | Defining_Identifier => | |
2888 | Make_Defining_Identifier (Loc, Name_uI), | |
2889 | Parameter_Type => | |
2890 | New_Reference_To (Standard_Integer, Loc)), | |
2891 | ||
2892 | Make_Parameter_Specification (Loc, -- A | |
2893 | Defining_Identifier => | |
2894 | Make_Defining_Identifier (Loc, Name_uA), | |
2895 | Parameter_Type => | |
2896 | New_Reference_To (Standard_Boolean, Loc)))); | |
2897 | end Make_Disp_Requeue_Spec; | |
2898 | ||
76a1c25b | 2899 | --------------------------------- |
2900 | -- Make_Disp_Timed_Select_Body -- | |
2901 | --------------------------------- | |
2902 | ||
cdb1c38f | 2903 | -- For interface types, generate: |
2904 | ||
2905 | -- procedure _Disp_Timed_Select | |
2906 | -- (T : in out <Typ>; | |
2907 | -- S : Integer; | |
2908 | -- P : System.Address; | |
2909 | -- D : Duration; | |
2910 | -- M : Integer; | |
2911 | -- C : out Ada.Tags.Prim_Op_Kind; | |
2912 | -- F : out Boolean) | |
2913 | -- is | |
2914 | -- begin | |
2915 | -- null; | |
2916 | -- end _Disp_Timed_Select; | |
2917 | ||
2918 | -- For protected types, generate: | |
2919 | ||
2920 | -- procedure _Disp_Timed_Select | |
2921 | -- (T : in out <Typ>; | |
2922 | -- S : Integer; | |
2923 | -- P : System.Address; | |
2924 | -- D : Duration; | |
2925 | -- M : Integer; | |
2926 | -- C : out Ada.Tags.Prim_Op_Kind; | |
2927 | -- F : out Boolean) | |
2928 | -- is | |
2929 | -- I : Integer; | |
2930 | ||
2931 | -- begin | |
2932 | -- C := Ada.Tags.Get_Prim_Op_Kind (Ada.Tags.Tag (<Typ>VP), S); | |
2933 | ||
2934 | -- if C = Ada.Tags.POK_Procedure | |
2935 | -- or else C = Ada.Tags.POK_Protected_Procedure | |
2936 | -- or else C = Ada.Tags.POK_Task_Procedure | |
2937 | -- then | |
2938 | -- F := True; | |
2939 | -- return; | |
2940 | -- end if; | |
2941 | ||
2942 | -- I := Ada.Tags.Get_Entry_Index (Ada.Tags.Tag (<Typ>VP), S); | |
2943 | -- System.Tasking.Protected_Objects.Operations. | |
2944 | -- Timed_Protected_Entry_Call | |
2945 | -- (T._object'Access, | |
2946 | -- System.Tasking.Protected_Objects.Protected_Entry_Index (I), | |
2947 | -- P, | |
2948 | -- D, | |
2949 | -- M, | |
2950 | -- F); | |
2951 | -- end _Disp_Timed_Select; | |
2952 | ||
2953 | -- For task types, generate: | |
2954 | ||
2955 | -- procedure _Disp_Timed_Select | |
2956 | -- (T : in out <Typ>; | |
2957 | -- S : Integer; | |
2958 | -- P : System.Address; | |
2959 | -- D : Duration; | |
2960 | -- M : Integer; | |
2961 | -- C : out Ada.Tags.Prim_Op_Kind; | |
2962 | -- F : out Boolean) | |
2963 | -- is | |
2964 | -- I : Integer; | |
2965 | ||
2966 | -- begin | |
2967 | -- I := Ada.Tags.Get_Entry_Index (Ada.Tags.Tag (<Typ>VP), S); | |
2968 | -- System.Tasking.Rendezvous.Timed_Task_Entry_Call | |
2969 | -- (T._task_id, | |
2970 | -- System.Tasking.Task_Entry_Index (I), | |
2971 | -- P, | |
2972 | -- D, | |
2973 | -- M, | |
2974 | -- D); | |
2975 | -- end _Disp_Time_Select; | |
2976 | ||
76a1c25b | 2977 | function Make_Disp_Timed_Select_Body |
2978 | (Typ : Entity_Id) return Node_Id | |
2979 | is | |
2980 | Loc : constant Source_Ptr := Sloc (Typ); | |
2981 | Conc_Typ : Entity_Id := Empty; | |
2982 | Decls : constant List_Id := New_List; | |
2983 | DT_Ptr : Entity_Id; | |
acf97c11 | 2984 | Obj_Ref : Node_Id; |
76a1c25b | 2985 | Stmts : constant List_Id := New_List; |
2986 | ||
2987 | begin | |
68f95949 | 2988 | pragma Assert (not Restriction_Active (No_Dispatching_Calls)); |
2989 | ||
952af0b9 | 2990 | -- Null body is generated for interface types |
2991 | ||
76a1c25b | 2992 | if Is_Interface (Typ) then |
2993 | return | |
2994 | Make_Subprogram_Body (Loc, | |
2995 | Specification => | |
2996 | Make_Disp_Timed_Select_Spec (Typ), | |
2997 | Declarations => | |
2998 | New_List, | |
2999 | Handled_Statement_Sequence => | |
3000 | Make_Handled_Sequence_Of_Statements (Loc, | |
3001 | New_List (Make_Null_Statement (Loc)))); | |
3002 | end if; | |
3003 | ||
76a1c25b | 3004 | DT_Ptr := Node (First_Elmt (Access_Disp_Table (Typ))); |
3005 | ||
952af0b9 | 3006 | if Is_Concurrent_Record_Type (Typ) then |
3007 | Conc_Typ := Corresponding_Concurrent_Type (Typ); | |
76a1c25b | 3008 | |
3009 | -- Generate: | |
3010 | -- I : Integer; | |
3011 | ||
3012 | -- where I will be used to capture the entry index of the primitive | |
3013 | -- wrapper at position S. | |
3014 | ||
3015 | Append_To (Decls, | |
3016 | Make_Object_Declaration (Loc, | |
3017 | Defining_Identifier => | |
3018 | Make_Defining_Identifier (Loc, Name_uI), | |
3019 | Object_Definition => | |
3020 | New_Reference_To (Standard_Integer, Loc))); | |
76a1c25b | 3021 | |
952af0b9 | 3022 | -- Generate: |
3023 | -- C := Get_Prim_Op_Kind (tag! (<type>VP), S); | |
76a1c25b | 3024 | |
952af0b9 | 3025 | -- if C = POK_Procedure |
3026 | -- or else C = POK_Protected_Procedure | |
3027 | -- or else C = POK_Task_Procedure; | |
3028 | -- then | |
3029 | -- F := True; | |
3030 | -- return; | |
3031 | -- end if; | |
76a1c25b | 3032 | |
725a69d2 | 3033 | Build_Common_Dispatching_Select_Statements (Loc, DT_Ptr, Stmts); |
76a1c25b | 3034 | |
3035 | -- Generate: | |
952af0b9 | 3036 | -- I := Get_Entry_Index (tag! (<type>VP), S); |
76a1c25b | 3037 | |
3038 | -- I is the entry index and S is the dispatch table slot | |
3039 | ||
3040 | Append_To (Stmts, | |
3041 | Make_Assignment_Statement (Loc, | |
3042 | Name => | |
3043 | Make_Identifier (Loc, Name_uI), | |
3044 | Expression => | |
725a69d2 | 3045 | Make_Function_Call (Loc, |
cdb1c38f | 3046 | Name => |
3047 | New_Reference_To (RTE (RE_Get_Entry_Index), Loc), | |
3048 | Parameter_Associations => | |
3049 | New_List ( | |
3050 | Unchecked_Convert_To (RTE (RE_Tag), | |
3051 | New_Reference_To (DT_Ptr, Loc)), | |
3052 | Make_Identifier (Loc, Name_uS))))); | |
76a1c25b | 3053 | |
acf97c11 | 3054 | -- Protected case |
3055 | ||
76a1c25b | 3056 | if Ekind (Conc_Typ) = E_Protected_Type then |
3057 | ||
acf97c11 | 3058 | -- Build T._object'Access |
3059 | ||
3060 | Obj_Ref := | |
3061 | Make_Attribute_Reference (Loc, | |
3062 | Attribute_Name => Name_Unchecked_Access, | |
3063 | Prefix => | |
3064 | Make_Selected_Component (Loc, | |
3065 | Prefix => Make_Identifier (Loc, Name_uT), | |
3066 | Selector_Name => Make_Identifier (Loc, Name_uObject))); | |
3067 | ||
3068 | -- Normal case, No_Entry_Queue restriction not active. In this | |
3069 | -- case we generate: | |
3070 | ||
3071 | -- Timed_Protected_Entry_Call | |
3072 | -- (T._object'access, | |
cdb1c38f | 3073 | -- Protected_Entry_Index! (I), |
acf97c11 | 3074 | -- P, D, M, F); |
76a1c25b | 3075 | |
3076 | -- where T is the protected object, I is the entry index, P are | |
3077 | -- the wrapped parameters, D is the delay amount, M is the delay | |
3078 | -- mode and F is the status flag. | |
3079 | ||
acf97c11 | 3080 | case Corresponding_Runtime_Package (Conc_Typ) is |
3081 | when System_Tasking_Protected_Objects_Entries => | |
3082 | Append_To (Stmts, | |
3083 | Make_Procedure_Call_Statement (Loc, | |
3084 | Name => | |
3085 | New_Reference_To | |
3086 | (RTE (RE_Timed_Protected_Entry_Call), Loc), | |
3087 | Parameter_Associations => | |
3088 | New_List ( | |
3089 | Obj_Ref, | |
3090 | ||
3091 | Make_Unchecked_Type_Conversion (Loc, -- entry index | |
3092 | Subtype_Mark => | |
3093 | New_Reference_To | |
3094 | (RTE (RE_Protected_Entry_Index), Loc), | |
3095 | Expression => | |
3096 | Make_Identifier (Loc, Name_uI)), | |
76a1c25b | 3097 | |
acf97c11 | 3098 | Make_Identifier (Loc, Name_uP), -- parameter block |
3099 | Make_Identifier (Loc, Name_uD), -- delay | |
3100 | Make_Identifier (Loc, Name_uM), -- delay mode | |
3101 | Make_Identifier (Loc, Name_uF)))); -- status flag | |
76a1c25b | 3102 | |
acf97c11 | 3103 | when System_Tasking_Protected_Objects_Single_Entry => |
3104 | -- Generate: | |
76a1c25b | 3105 | |
acf97c11 | 3106 | -- Timed_Protected_Single_Entry_Call |
3107 | -- (T._object'access, P, D, M, F); | |
3108 | ||
3109 | -- where T is the protected object, P is the wrapped | |
3110 | -- parameters, D is the delay amount, M is the delay mode, F | |
3111 | -- is the status flag. | |
3112 | ||
3113 | Append_To (Stmts, | |
3114 | Make_Procedure_Call_Statement (Loc, | |
3115 | Name => | |
3116 | New_Reference_To | |
3117 | (RTE (RE_Timed_Protected_Single_Entry_Call), Loc), | |
3118 | Parameter_Associations => | |
3119 | New_List ( | |
3120 | Obj_Ref, | |
3121 | Make_Identifier (Loc, Name_uP), -- parameter block | |
3122 | Make_Identifier (Loc, Name_uD), -- delay | |
3123 | Make_Identifier (Loc, Name_uM), -- delay mode | |
3124 | Make_Identifier (Loc, Name_uF)))); -- status flag | |
3125 | ||
3126 | when others => | |
3127 | raise Program_Error; | |
3128 | end case; | |
3129 | ||
3130 | -- Task case | |
ee6ba406 | 3131 | |
ee6ba406 | 3132 | else |
76a1c25b | 3133 | pragma Assert (Ekind (Conc_Typ) = E_Task_Type); |
3134 | ||
3135 | -- Generate: | |
3136 | -- Timed_Task_Entry_Call ( | |
3137 | -- T._task_id, | |
cdb1c38f | 3138 | -- Task_Entry_Index! (I), |
76a1c25b | 3139 | -- P, |
3140 | -- D, | |
3141 | -- M, | |
3142 | -- F); | |
3143 | ||
3144 | -- where T is the task object, I is the entry index, P are the | |
3145 | -- wrapped parameters, D is the delay amount, M is the delay | |
3146 | -- mode and F is the status flag. | |
3147 | ||
3148 | Append_To (Stmts, | |
3149 | Make_Procedure_Call_Statement (Loc, | |
3150 | Name => | |
3151 | New_Reference_To (RTE (RE_Timed_Task_Entry_Call), Loc), | |
3152 | Parameter_Associations => | |
3153 | New_List ( | |
3154 | ||
3155 | Make_Selected_Component (Loc, -- T._task_id | |
3156 | Prefix => | |
3157 | Make_Identifier (Loc, Name_uT), | |
3158 | Selector_Name => | |
3159 | Make_Identifier (Loc, Name_uTask_Id)), | |
3160 | ||
3161 | Make_Unchecked_Type_Conversion (Loc, -- entry index | |
3162 | Subtype_Mark => | |
3163 | New_Reference_To (RTE (RE_Task_Entry_Index), Loc), | |
3164 | Expression => | |
3165 | Make_Identifier (Loc, Name_uI)), | |
3166 | ||
3167 | Make_Identifier (Loc, Name_uP), -- parameter block | |
3168 | Make_Identifier (Loc, Name_uD), -- delay | |
3169 | Make_Identifier (Loc, Name_uM), -- delay mode | |
3170 | Make_Identifier (Loc, Name_uF)))); -- status flag | |
ee6ba406 | 3171 | end if; |
7c949aad | 3172 | |
3173 | else | |
3174 | -- Ensure that the statements list is non-empty | |
3175 | ||
3176 | Append_To (Stmts, Make_Null_Statement (Loc)); | |
76a1c25b | 3177 | end if; |
3178 | ||
3179 | return | |
3180 | Make_Subprogram_Body (Loc, | |
3181 | Specification => | |
3182 | Make_Disp_Timed_Select_Spec (Typ), | |
3183 | Declarations => | |
3184 | Decls, | |
3185 | Handled_Statement_Sequence => | |
3186 | Make_Handled_Sequence_Of_Statements (Loc, Stmts)); | |
3187 | end Make_Disp_Timed_Select_Body; | |
3188 | ||
3189 | --------------------------------- | |
3190 | -- Make_Disp_Timed_Select_Spec -- | |
3191 | --------------------------------- | |
3192 | ||
3193 | function Make_Disp_Timed_Select_Spec | |
3194 | (Typ : Entity_Id) return Node_Id | |
3195 | is | |
3196 | Loc : constant Source_Ptr := Sloc (Typ); | |
3197 | Def_Id : constant Node_Id := | |
3198 | Make_Defining_Identifier (Loc, | |
3199 | Name_uDisp_Timed_Select); | |
3200 | Params : constant List_Id := New_List; | |
ee6ba406 | 3201 | |
76a1c25b | 3202 | begin |
68f95949 | 3203 | pragma Assert (not Restriction_Active (No_Dispatching_Calls)); |
3204 | ||
725a69d2 | 3205 | -- T : in out Typ; -- Object parameter |
3206 | -- S : Integer; -- Primitive operation slot | |
3207 | -- P : Address; -- Wrapped parameters | |
3208 | -- D : Duration; -- Delay | |
3209 | -- M : Integer; -- Delay Mode | |
3210 | -- C : out Prim_Op_Kind; -- Call kind | |
3211 | -- F : out Boolean; -- Status flag | |
76a1c25b | 3212 | |
725a69d2 | 3213 | Append_List_To (Params, New_List ( |
3214 | ||
3215 | Make_Parameter_Specification (Loc, | |
3216 | Defining_Identifier => | |
3217 | Make_Defining_Identifier (Loc, Name_uT), | |
3218 | Parameter_Type => | |
3219 | New_Reference_To (Typ, Loc), | |
3220 | In_Present => True, | |
3221 | Out_Present => True), | |
3222 | ||
3223 | Make_Parameter_Specification (Loc, | |
3224 | Defining_Identifier => | |
3225 | Make_Defining_Identifier (Loc, Name_uS), | |
3226 | Parameter_Type => | |
3227 | New_Reference_To (Standard_Integer, Loc)), | |
3228 | ||
3229 | Make_Parameter_Specification (Loc, | |
3230 | Defining_Identifier => | |
3231 | Make_Defining_Identifier (Loc, Name_uP), | |
3232 | Parameter_Type => | |
3233 | New_Reference_To (RTE (RE_Address), Loc)), | |
76a1c25b | 3234 | |
76a1c25b | 3235 | Make_Parameter_Specification (Loc, |
3236 | Defining_Identifier => | |
3237 | Make_Defining_Identifier (Loc, Name_uD), | |
3238 | Parameter_Type => | |
725a69d2 | 3239 | New_Reference_To (Standard_Duration, Loc)), |
76a1c25b | 3240 | |
76a1c25b | 3241 | Make_Parameter_Specification (Loc, |
3242 | Defining_Identifier => | |
3243 | Make_Defining_Identifier (Loc, Name_uM), | |
3244 | Parameter_Type => | |
725a69d2 | 3245 | New_Reference_To (Standard_Integer, Loc)), |
ee6ba406 | 3246 | |
725a69d2 | 3247 | Make_Parameter_Specification (Loc, |
3248 | Defining_Identifier => | |
3249 | Make_Defining_Identifier (Loc, Name_uC), | |
3250 | Parameter_Type => | |
3251 | New_Reference_To (RTE (RE_Prim_Op_Kind), Loc), | |
3252 | Out_Present => True))); | |
ee6ba406 | 3253 | |
725a69d2 | 3254 | Append_To (Params, |
3255 | Make_Parameter_Specification (Loc, | |
3256 | Defining_Identifier => | |
3257 | Make_Defining_Identifier (Loc, Name_uF), | |
3258 | Parameter_Type => | |
3259 | New_Reference_To (Standard_Boolean, Loc), | |
3260 | Out_Present => True)); | |
ee6ba406 | 3261 | |
76a1c25b | 3262 | return |
3263 | Make_Procedure_Specification (Loc, | |
3264 | Defining_Unit_Name => Def_Id, | |
3265 | Parameter_Specifications => Params); | |
3266 | end Make_Disp_Timed_Select_Spec; | |
ee6ba406 | 3267 | |
76a1c25b | 3268 | ------------- |
3269 | -- Make_DT -- | |
3270 | ------------- | |
ee6ba406 | 3271 | |
725a69d2 | 3272 | -- The frontend supports two models for expanding dispatch tables |
3273 | -- associated with library-level defined tagged types: statically | |
3274 | -- and non-statically allocated dispatch tables. In the former case | |
3275 | -- the object containing the dispatch table is constant and it is | |
3276 | -- initialized by means of a positional aggregate. In the latter case, | |
3277 | -- the object containing the dispatch table is a variable which is | |
3278 | -- initialized by means of assignments. | |
3279 | ||
3280 | -- In case of locally defined tagged types, the object containing the | |
3281 | -- object containing the dispatch table is always a variable (instead | |
3282 | -- of a constant). This is currently required to give support to late | |
3283 | -- overriding of primitives. For example: | |
3284 | ||
3285 | -- procedure Example is | |
3286 | -- package Pkg is | |
3287 | -- type T1 is tagged null record; | |
3288 | -- procedure Prim (O : T1); | |
3289 | -- end Pkg; | |
3290 | ||
3291 | -- type T2 is new Pkg.T1 with null record; | |
3292 | -- procedure Prim (X : T2) is -- late overriding | |
3293 | -- begin | |
3294 | -- ... | |
3295 | -- ... | |
3296 | -- end; | |
952af0b9 | 3297 | |
17e14451 | 3298 | function Make_DT (Typ : Entity_Id; N : Node_Id := Empty) return List_Id is |
3299 | Loc : constant Source_Ptr := Sloc (Typ); | |
3300 | ||
725a69d2 | 3301 | Max_Predef_Prims : constant Int := |
3302 | UI_To_Int | |
3303 | (Intval | |
3304 | (Expression | |
17e14451 | 3305 | (Parent (RTE (RE_Max_Predef_Prims))))); |
3306 | ||
cc60bd16 | 3307 | DT_Decl : constant Elist_Id := New_Elmt_List; |
3308 | DT_Aggr : constant Elist_Id := New_Elmt_List; | |
3309 | -- Entities marked with attribute Is_Dispatch_Table_Entity | |
3310 | ||
17e14451 | 3311 | procedure Check_Premature_Freezing (Subp : Entity_Id; Typ : Entity_Id); |
3312 | -- Verify that all non-tagged types in the profile of a subprogram | |
3313 | -- are frozen at the point the subprogram is frozen. This enforces | |
3314 | -- the rule on RM 13.14 (14) as modified by AI05-019. At the point a | |
3315 | -- subprogram is frozen, enough must be known about it to build the | |
3316 | -- activation record for it, which requires at least that the size of | |
3317 | -- all parameters be known. Controlling arguments are by-reference, | |
3318 | -- and therefore the rule only applies to non-tagged types. | |
3319 | -- Typical violation of the rule involves an object declaration that | |
3320 | -- freezes a tagged type, when one of its primitive operations has a | |
3321 | -- type in its profile whose full view has not been analyzed yet. | |
725a69d2 | 3322 | |
f301a57b | 3323 | procedure Export_DT (Typ : Entity_Id; DT : Entity_Id; Index : Nat := 0); |
3324 | -- Export the dispatch table DT of tagged type Typ. Required to generate | |
3325 | -- forward references and statically allocate the table. For primary | |
3326 | -- dispatch tables Index is 0; for secondary dispatch tables the value | |
3327 | -- of index must match the Suffix_Index value assigned to the table by | |
3328 | -- Make_Tags when generating its unique external name, and it is used to | |
3329 | -- retrieve from the Dispatch_Table_Wrappers list associated with Typ | |
3330 | -- the external name generated by Import_DT. | |
24971415 | 3331 | |
725a69d2 | 3332 | procedure Make_Secondary_DT |
acf97c11 | 3333 | (Typ : Entity_Id; |
3334 | Iface : Entity_Id; | |
f301a57b | 3335 | Suffix_Index : Int; |
acf97c11 | 3336 | Num_Iface_Prims : Nat; |
3337 | Iface_DT_Ptr : Entity_Id; | |
3338 | Predef_Prims_Ptr : Entity_Id; | |
3339 | Build_Thunks : Boolean; | |
3340 | Result : List_Id); | |
cdb1c38f | 3341 | -- Ada 2005 (AI-251): Expand the declarations for a Secondary Dispatch |
3342 | -- Table of Typ associated with Iface. Each abstract interface of Typ | |
3343 | -- has two secondary dispatch tables: one containing pointers to thunks | |
3344 | -- and another containing pointers to the primitives covering the | |
3345 | -- interface primitives. The former secondary table is generated when | |
3346 | -- Build_Thunks is True, and provides common support for dispatching | |
3347 | -- calls through interface types; the latter secondary table is | |
3348 | -- generated when Build_Thunks is False, and provides support for | |
3349 | -- Generic Dispatching Constructors that dispatch calls through | |
f301a57b | 3350 | -- interface types. When constructing this latter table the value |
3351 | -- of Suffix_Index is -1 to indicate that there is no need to export | |
3352 | -- such table when building statically allocated dispatch tables; a | |
3353 | -- positive value of Suffix_Index must match the Suffix_Index value | |
3354 | -- assigned to this secondary dispatch table by Make_Tags when its | |
3355 | -- unique external name was generated. | |
9dfe12ae | 3356 | |
17e14451 | 3357 | ------------------------------ |
3358 | -- Check_Premature_Freezing -- | |
3359 | ------------------------------ | |
3360 | ||
3361 | procedure Check_Premature_Freezing (Subp : Entity_Id; Typ : Entity_Id) is | |
3362 | begin | |
3363 | if Present (N) | |
3364 | and then Is_Private_Type (Typ) | |
3365 | and then No (Full_View (Typ)) | |
3366 | and then not Is_Generic_Type (Typ) | |
3367 | and then not Is_Tagged_Type (Typ) | |
3368 | and then not Is_Frozen (Typ) | |
3369 | then | |
3370 | Error_Msg_Sloc := Sloc (Subp); | |
3371 | Error_Msg_NE | |
3372 | ("declaration must appear after completion of type &", N, Typ); | |
3373 | Error_Msg_NE | |
3374 | ("\which is an untagged type in the profile of" | |
3375 | & " primitive operation & declared#", | |
3376 | N, Subp); | |
3377 | end if; | |
3378 | end Check_Premature_Freezing; | |
3379 | ||
24971415 | 3380 | --------------- |
3381 | -- Export_DT -- | |
3382 | --------------- | |
3383 | ||
f301a57b | 3384 | procedure Export_DT (Typ : Entity_Id; DT : Entity_Id; Index : Nat := 0) |
3385 | is | |
3386 | Count : Nat; | |
3387 | Elmt : Elmt_Id; | |
3388 | ||
24971415 | 3389 | begin |
3390 | Set_Is_Statically_Allocated (DT); | |
3391 | Set_Is_True_Constant (DT); | |
3392 | Set_Is_Exported (DT); | |
3393 | ||
f301a57b | 3394 | Count := 0; |
3395 | Elmt := First_Elmt (Dispatch_Table_Wrappers (Typ)); | |
3396 | while Count /= Index loop | |
3397 | Next_Elmt (Elmt); | |
3398 | Count := Count + 1; | |
3399 | end loop; | |
3400 | ||
3401 | pragma Assert (Related_Type (Node (Elmt)) = Typ); | |
3402 | ||
3403 | Get_External_Name | |
3404 | (Entity => Node (Elmt), | |
3405 | Has_Suffix => True); | |
3406 | ||
24971415 | 3407 | Set_Interface_Name (DT, |
3408 | Make_String_Literal (Loc, | |
3409 | Strval => String_From_Name_Buffer)); | |
3410 | ||
3411 | -- Ensure proper Sprint output of this implicit importation | |
3412 | ||
3413 | Set_Is_Internal (DT); | |
3414 | Set_Is_Public (DT); | |
3415 | end Export_DT; | |
3416 | ||
725a69d2 | 3417 | ----------------------- |
3418 | -- Make_Secondary_DT -- | |
3419 | ----------------------- | |
ee6ba406 | 3420 | |
725a69d2 | 3421 | procedure Make_Secondary_DT |
acf97c11 | 3422 | (Typ : Entity_Id; |
3423 | Iface : Entity_Id; | |
f301a57b | 3424 | Suffix_Index : Int; |
acf97c11 | 3425 | Num_Iface_Prims : Nat; |
3426 | Iface_DT_Ptr : Entity_Id; | |
3427 | Predef_Prims_Ptr : Entity_Id; | |
3428 | Build_Thunks : Boolean; | |
3429 | Result : List_Id) | |
725a69d2 | 3430 | is |
3431 | Loc : constant Source_Ptr := Sloc (Typ); | |
f301a57b | 3432 | Exporting_Table : constant Boolean := |
3433 | Building_Static_DT (Typ) | |
3434 | and then Suffix_Index > 0; | |
725a69d2 | 3435 | Iface_DT : constant Entity_Id := |
f301a57b | 3436 | Make_Defining_Identifier (Loc, |
3437 | Chars => New_Internal_Name ('T')); | |
725a69d2 | 3438 | Name_Predef_Prims : constant Name_Id := New_Internal_Name ('R'); |
3439 | Predef_Prims : constant Entity_Id := | |
3440 | Make_Defining_Identifier (Loc, | |
f301a57b | 3441 | Chars => Name_Predef_Prims); |
725a69d2 | 3442 | DT_Constr_List : List_Id; |
3443 | DT_Aggr_List : List_Id; | |
3444 | Empty_DT : Boolean := False; | |
3445 | Nb_Predef_Prims : Nat := 0; | |
3446 | Nb_Prim : Nat; | |
3447 | New_Node : Node_Id; | |
3448 | OSD : Entity_Id; | |
3449 | OSD_Aggr_List : List_Id; | |
3450 | Pos : Nat; | |
3451 | Prim : Entity_Id; | |
3452 | Prim_Elmt : Elmt_Id; | |
3453 | Prim_Ops_Aggr_List : List_Id; | |
343d35dc | 3454 | |
725a69d2 | 3455 | begin |
17e14451 | 3456 | -- Handle cases in which we do not generate statically allocated |
3457 | -- dispatch tables. | |
343d35dc | 3458 | |
24971415 | 3459 | if not Building_Static_DT (Typ) then |
725a69d2 | 3460 | Set_Ekind (Predef_Prims, E_Variable); |
725a69d2 | 3461 | Set_Ekind (Iface_DT, E_Variable); |
343d35dc | 3462 | |
725a69d2 | 3463 | -- Statically allocated dispatch tables and related entities are |
3464 | -- constants. | |
343d35dc | 3465 | |
725a69d2 | 3466 | else |
3467 | Set_Ekind (Predef_Prims, E_Constant); | |
3468 | Set_Is_Statically_Allocated (Predef_Prims); | |
3469 | Set_Is_True_Constant (Predef_Prims); | |
343d35dc | 3470 | |
725a69d2 | 3471 | Set_Ekind (Iface_DT, E_Constant); |
3472 | Set_Is_Statically_Allocated (Iface_DT); | |
3473 | Set_Is_True_Constant (Iface_DT); | |
343d35dc | 3474 | end if; |
3475 | ||
f301a57b | 3476 | -- Calculate the number of slots of the dispatch table. If the number |
3477 | -- of primitives of Typ is 0 we reserve a dummy single entry for its | |
3478 | -- DT because at run-time the pointer to this dummy entry will be | |
3479 | -- used as the tag. | |
68f95949 | 3480 | |
cdb1c38f | 3481 | if Num_Iface_Prims = 0 then |
725a69d2 | 3482 | Empty_DT := True; |
3483 | Nb_Prim := 1; | |
cdb1c38f | 3484 | else |
3485 | Nb_Prim := Num_Iface_Prims; | |
725a69d2 | 3486 | end if; |
76a1c25b | 3487 | |
725a69d2 | 3488 | -- Generate: |
952af0b9 | 3489 | |
725a69d2 | 3490 | -- Predef_Prims : Address_Array (1 .. Default_Prim_Ops_Count) := |
3491 | -- (predef-prim-op-thunk-1'address, | |
3492 | -- predef-prim-op-thunk-2'address, | |
3493 | -- ... | |
3494 | -- predef-prim-op-thunk-n'address); | |
3495 | -- for Predef_Prims'Alignment use Address'Alignment | |
952af0b9 | 3496 | |
725a69d2 | 3497 | -- Stage 1: Calculate the number of predefined primitives |
76a1c25b | 3498 | |
24971415 | 3499 | if not Building_Static_DT (Typ) then |
725a69d2 | 3500 | Nb_Predef_Prims := Max_Predef_Prims; |
3501 | else | |
3502 | Prim_Elmt := First_Elmt (Primitive_Operations (Typ)); | |
3503 | while Present (Prim_Elmt) loop | |
3504 | Prim := Node (Prim_Elmt); | |
aad6babd | 3505 | |
725a69d2 | 3506 | if Is_Predefined_Dispatching_Operation (Prim) |
3507 | and then not Is_Abstract_Subprogram (Prim) | |
3508 | then | |
3509 | Pos := UI_To_Int (DT_Position (Prim)); | |
aad6babd | 3510 | |
725a69d2 | 3511 | if Pos > Nb_Predef_Prims then |
3512 | Nb_Predef_Prims := Pos; | |
3513 | end if; | |
3514 | end if; | |
aad6babd | 3515 | |
725a69d2 | 3516 | Next_Elmt (Prim_Elmt); |
3517 | end loop; | |
3518 | end if; | |
aad6babd | 3519 | |
725a69d2 | 3520 | -- Stage 2: Create the thunks associated with the predefined |
3521 | -- primitives and save their entity to fill the aggregate. | |
ee6ba406 | 3522 | |
725a69d2 | 3523 | declare |
3524 | Prim_Table : array (Nat range 1 .. Nb_Predef_Prims) of Entity_Id; | |
cc60bd16 | 3525 | Decl : Node_Id; |
725a69d2 | 3526 | Thunk_Id : Entity_Id; |
3527 | Thunk_Code : Node_Id; | |
aad6babd | 3528 | |
725a69d2 | 3529 | begin |
3530 | Prim_Ops_Aggr_List := New_List; | |
3531 | Prim_Table := (others => Empty); | |
aad6babd | 3532 | |
cdb1c38f | 3533 | if Building_Static_DT (Typ) then |
3534 | Prim_Elmt := First_Elmt (Primitive_Operations (Typ)); | |
3535 | while Present (Prim_Elmt) loop | |
3536 | Prim := Node (Prim_Elmt); | |
aad6babd | 3537 | |
cdb1c38f | 3538 | if Is_Predefined_Dispatching_Operation (Prim) |
3539 | and then not Is_Abstract_Subprogram (Prim) | |
3540 | and then not Present (Prim_Table | |
3541 | (UI_To_Int (DT_Position (Prim)))) | |
3542 | then | |
3543 | if not Build_Thunks then | |
3544 | Prim_Table (UI_To_Int (DT_Position (Prim))) := | |
3545 | Alias (Prim); | |
aad6babd | 3546 | |
cdb1c38f | 3547 | else |
3548 | while Present (Alias (Prim)) loop | |
3549 | Prim := Alias (Prim); | |
3550 | end loop; | |
3551 | ||
3552 | Expand_Interface_Thunk (Prim, Thunk_Id, Thunk_Code); | |
aad6babd | 3553 | |
cdb1c38f | 3554 | if Present (Thunk_Id) then |
3555 | Append_To (Result, Thunk_Code); | |
3556 | Prim_Table (UI_To_Int (DT_Position (Prim))) | |
3557 | := Thunk_Id; | |
3558 | end if; | |
3559 | end if; | |
725a69d2 | 3560 | end if; |
aad6babd | 3561 | |
cdb1c38f | 3562 | Next_Elmt (Prim_Elmt); |
3563 | end loop; | |
3564 | end if; | |
aad6babd | 3565 | |
725a69d2 | 3566 | for J in Prim_Table'Range loop |
3567 | if Present (Prim_Table (J)) then | |
3568 | New_Node := | |
cc60bd16 | 3569 | Unchecked_Convert_To (RTE (RE_Prim_Ptr), |
acf97c11 | 3570 | Make_Attribute_Reference (Loc, |
3571 | Prefix => New_Reference_To (Prim_Table (J), Loc), | |
3572 | Attribute_Name => Name_Unrestricted_Access)); | |
725a69d2 | 3573 | else |
cc60bd16 | 3574 | New_Node := Make_Null (Loc); |
725a69d2 | 3575 | end if; |
952af0b9 | 3576 | |
725a69d2 | 3577 | Append_To (Prim_Ops_Aggr_List, New_Node); |
3578 | end loop; | |
952af0b9 | 3579 | |
cc60bd16 | 3580 | New_Node := |
3581 | Make_Aggregate (Loc, | |
3582 | Expressions => Prim_Ops_Aggr_List); | |
3583 | ||
3584 | -- Remember aggregates initializing dispatch tables | |
3585 | ||
3586 | Append_Elmt (New_Node, DT_Aggr); | |
3587 | ||
3588 | Decl := | |
3589 | Make_Subtype_Declaration (Loc, | |
3590 | Defining_Identifier => | |
3591 | Make_Defining_Identifier (Loc, | |
3592 | New_Internal_Name ('S')), | |
3593 | Subtype_Indication => | |
3594 | New_Reference_To (RTE (RE_Address_Array), Loc)); | |
3595 | ||
3596 | Append_To (Result, Decl); | |
3597 | ||
725a69d2 | 3598 | Append_To (Result, |
3599 | Make_Object_Declaration (Loc, | |
3600 | Defining_Identifier => Predef_Prims, | |
24971415 | 3601 | Constant_Present => Building_Static_DT (Typ), |
725a69d2 | 3602 | Aliased_Present => True, |
cc60bd16 | 3603 | Object_Definition => New_Reference_To |
3604 | (Defining_Identifier (Decl), Loc), | |
3605 | Expression => New_Node)); | |
aad6babd | 3606 | |
725a69d2 | 3607 | Append_To (Result, |
3608 | Make_Attribute_Definition_Clause (Loc, | |
3609 | Name => New_Reference_To (Predef_Prims, Loc), | |
3610 | Chars => Name_Alignment, | |
3611 | Expression => | |
3612 | Make_Attribute_Reference (Loc, | |
3613 | Prefix => | |
3614 | New_Reference_To (RTE (RE_Integer_Address), Loc), | |
3615 | Attribute_Name => Name_Alignment))); | |
3616 | end; | |
aad6babd | 3617 | |
725a69d2 | 3618 | -- Generate |
76a1c25b | 3619 | |
725a69d2 | 3620 | -- OSD : Ada.Tags.Object_Specific_Data (Nb_Prims) := |
3621 | -- (OSD_Table => (1 => <value>, | |
3622 | -- ... | |
3623 | -- N => <value>)); | |
76a1c25b | 3624 | |
725a69d2 | 3625 | -- Iface_DT : Dispatch_Table (Nb_Prims) := |
3626 | -- ([ Signature => <sig-value> ], | |
3627 | -- Tag_Kind => <tag_kind-value>, | |
3628 | -- Predef_Prims => Predef_Prims'Address, | |
3629 | -- Offset_To_Top => 0, | |
3630 | -- OSD => OSD'Address, | |
3631 | -- Prims_Ptr => (prim-op-1'address, | |
3632 | -- prim-op-2'address, | |
3633 | -- ... | |
3634 | -- prim-op-n'address)); | |
f301a57b | 3635 | -- for Iface_DT'Alignment use Address'Alignment; |
76a1c25b | 3636 | |
725a69d2 | 3637 | -- Stage 3: Initialize the discriminant and the record components |
aad6babd | 3638 | |
725a69d2 | 3639 | DT_Constr_List := New_List; |
3640 | DT_Aggr_List := New_List; | |
343d35dc | 3641 | |
725a69d2 | 3642 | -- Nb_Prim. If the tagged type has no primitives we add a dummy |
3643 | -- slot whose address will be the tag of this type. | |
343d35dc | 3644 | |
725a69d2 | 3645 | if Nb_Prim = 0 then |
3646 | New_Node := Make_Integer_Literal (Loc, 1); | |
3647 | else | |
3648 | New_Node := Make_Integer_Literal (Loc, Nb_Prim); | |
3649 | end if; | |
343d35dc | 3650 | |
725a69d2 | 3651 | Append_To (DT_Constr_List, New_Node); |
3652 | Append_To (DT_Aggr_List, New_Copy (New_Node)); | |
343d35dc | 3653 | |
725a69d2 | 3654 | -- Signature |
343d35dc | 3655 | |
725a69d2 | 3656 | if RTE_Record_Component_Available (RE_Signature) then |
3657 | Append_To (DT_Aggr_List, | |
3658 | New_Reference_To (RTE (RE_Secondary_DT), Loc)); | |
3659 | end if; | |
343d35dc | 3660 | |
725a69d2 | 3661 | -- Tag_Kind |
343d35dc | 3662 | |
725a69d2 | 3663 | if RTE_Record_Component_Available (RE_Tag_Kind) then |
3664 | Append_To (DT_Aggr_List, Tagged_Kind (Typ)); | |
3665 | end if; | |
aad6babd | 3666 | |
725a69d2 | 3667 | -- Predef_Prims |
aad6babd | 3668 | |
725a69d2 | 3669 | Append_To (DT_Aggr_List, |
3670 | Make_Attribute_Reference (Loc, | |
3671 | Prefix => New_Reference_To (Predef_Prims, Loc), | |
3672 | Attribute_Name => Name_Address)); | |
aad6babd | 3673 | |
725a69d2 | 3674 | -- Note: The correct value of Offset_To_Top will be set by the init |
3675 | -- subprogram | |
aad6babd | 3676 | |
725a69d2 | 3677 | Append_To (DT_Aggr_List, Make_Integer_Literal (Loc, 0)); |
aad6babd | 3678 | |
725a69d2 | 3679 | -- Generate the Object Specific Data table required to dispatch calls |
3680 | -- through synchronized interfaces. | |
aad6babd | 3681 | |
725a69d2 | 3682 | if Empty_DT |
3683 | or else Is_Abstract_Type (Typ) | |
3684 | or else Is_Controlled (Typ) | |
3685 | or else Restriction_Active (No_Dispatching_Calls) | |
3686 | or else not Is_Limited_Type (Typ) | |
a652dd51 | 3687 | or else not Has_Interfaces (Typ) |
cdb1c38f | 3688 | or else not Build_Thunks |
38d2fa31 | 3689 | or else not RTE_Record_Component_Available (RE_OSD_Table) |
725a69d2 | 3690 | then |
3691 | -- No OSD table required | |
ee6ba406 | 3692 | |
725a69d2 | 3693 | Append_To (DT_Aggr_List, |
3694 | New_Reference_To (RTE (RE_Null_Address), Loc)); | |
d62940bf | 3695 | |
725a69d2 | 3696 | else |
3697 | OSD_Aggr_List := New_List; | |
d62940bf | 3698 | |
725a69d2 | 3699 | declare |
3700 | Prim_Table : array (Nat range 1 .. Nb_Prim) of Entity_Id; | |
3701 | Prim : Entity_Id; | |
3702 | Prim_Alias : Entity_Id; | |
3703 | Prim_Elmt : Elmt_Id; | |
3704 | E : Entity_Id; | |
3705 | Count : Nat := 0; | |
3706 | Pos : Nat; | |
d62940bf | 3707 | |
725a69d2 | 3708 | begin |
3709 | Prim_Table := (others => Empty); | |
3710 | Prim_Alias := Empty; | |
d62940bf | 3711 | |
725a69d2 | 3712 | Prim_Elmt := First_Elmt (Primitive_Operations (Typ)); |
3713 | while Present (Prim_Elmt) loop | |
3714 | Prim := Node (Prim_Elmt); | |
d62940bf | 3715 | |
a652dd51 | 3716 | if Present (Interface_Alias (Prim)) |
725a69d2 | 3717 | and then Find_Dispatching_Type |
a652dd51 | 3718 | (Interface_Alias (Prim)) = Iface |
725a69d2 | 3719 | then |
a652dd51 | 3720 | Prim_Alias := Interface_Alias (Prim); |
d62940bf | 3721 | |
725a69d2 | 3722 | E := Prim; |
3723 | while Present (Alias (E)) loop | |
3724 | E := Alias (E); | |
3725 | end loop; | |
68f95949 | 3726 | |
725a69d2 | 3727 | Pos := UI_To_Int (DT_Position (Prim_Alias)); |
68f95949 | 3728 | |
725a69d2 | 3729 | if Present (Prim_Table (Pos)) then |
3730 | pragma Assert (Prim_Table (Pos) = E); | |
3731 | null; | |
68f95949 | 3732 | |
725a69d2 | 3733 | else |
3734 | Prim_Table (Pos) := E; | |
3735 | ||
3736 | Append_To (OSD_Aggr_List, | |
3737 | Make_Component_Association (Loc, | |
3738 | Choices => New_List ( | |
3739 | Make_Integer_Literal (Loc, | |
3740 | DT_Position (Prim_Alias))), | |
3741 | Expression => | |
3742 | Make_Integer_Literal (Loc, | |
3743 | DT_Position (Alias (Prim))))); | |
3744 | ||
3745 | Count := Count + 1; | |
3746 | end if; | |
3747 | end if; | |
3748 | ||
3749 | Next_Elmt (Prim_Elmt); | |
3750 | end loop; | |
3751 | pragma Assert (Count = Nb_Prim); | |
3752 | end; | |
3753 | ||
3754 | OSD := Make_Defining_Identifier (Loc, New_Internal_Name ('I')); | |
3755 | ||
3756 | Append_To (Result, | |
3757 | Make_Object_Declaration (Loc, | |
3758 | Defining_Identifier => OSD, | |
3759 | Object_Definition => | |
3760 | Make_Subtype_Indication (Loc, | |
3761 | Subtype_Mark => | |
3762 | New_Reference_To (RTE (RE_Object_Specific_Data), Loc), | |
3763 | Constraint => | |
3764 | Make_Index_Or_Discriminant_Constraint (Loc, | |
3765 | Constraints => New_List ( | |
3766 | Make_Integer_Literal (Loc, Nb_Prim)))), | |
3767 | Expression => Make_Aggregate (Loc, | |
3768 | Component_Associations => New_List ( | |
3769 | Make_Component_Association (Loc, | |
3770 | Choices => New_List ( | |
3771 | New_Occurrence_Of | |
3772 | (RTE_Record_Component (RE_OSD_Num_Prims), Loc)), | |
3773 | Expression => | |
3774 | Make_Integer_Literal (Loc, Nb_Prim)), | |
3775 | ||
3776 | Make_Component_Association (Loc, | |
3777 | Choices => New_List ( | |
3778 | New_Occurrence_Of | |
3779 | (RTE_Record_Component (RE_OSD_Table), Loc)), | |
3780 | Expression => Make_Aggregate (Loc, | |
3781 | Component_Associations => OSD_Aggr_List)))))); | |
3782 | ||
17e14451 | 3783 | Append_To (Result, |
3784 | Make_Attribute_Definition_Clause (Loc, | |
3785 | Name => New_Reference_To (OSD, Loc), | |
3786 | Chars => Name_Alignment, | |
3787 | Expression => | |
3788 | Make_Attribute_Reference (Loc, | |
3789 | Prefix => | |
3790 | New_Reference_To (RTE (RE_Integer_Address), Loc), | |
3791 | Attribute_Name => Name_Alignment))); | |
3792 | ||
725a69d2 | 3793 | -- In secondary dispatch tables the Typeinfo component contains |
3794 | -- the address of the Object Specific Data (see a-tags.ads) | |
3795 | ||
3796 | Append_To (DT_Aggr_List, | |
3797 | Make_Attribute_Reference (Loc, | |
3798 | Prefix => New_Reference_To (OSD, Loc), | |
3799 | Attribute_Name => Name_Address)); | |
3800 | end if; | |
3801 | ||
3802 | -- Initialize the table of primitive operations | |
3803 | ||
3804 | Prim_Ops_Aggr_List := New_List; | |
3805 | ||
3806 | if Empty_DT then | |
cc60bd16 | 3807 | Append_To (Prim_Ops_Aggr_List, Make_Null (Loc)); |
725a69d2 | 3808 | |
3809 | elsif Is_Abstract_Type (Typ) | |
24971415 | 3810 | or else not Building_Static_DT (Typ) |
725a69d2 | 3811 | then |
3812 | for J in 1 .. Nb_Prim loop | |
cc60bd16 | 3813 | Append_To (Prim_Ops_Aggr_List, Make_Null (Loc)); |
725a69d2 | 3814 | end loop; |
3815 | ||
3816 | else | |
3817 | declare | |
3818 | Prim_Table : array (Nat range 1 .. Nb_Prim) of Entity_Id; | |
3819 | Pos : Nat; | |
3820 | Thunk_Code : Node_Id; | |
3821 | Thunk_Id : Entity_Id; | |
3822 | ||
3823 | begin | |
3824 | Prim_Table := (others => Empty); | |
3825 | ||
3826 | Prim_Elmt := First_Elmt (Primitive_Operations (Typ)); | |
3827 | while Present (Prim_Elmt) loop | |
3828 | Prim := Node (Prim_Elmt); | |
3829 | ||
3830 | if not Is_Predefined_Dispatching_Operation (Prim) | |
a652dd51 | 3831 | and then Present (Interface_Alias (Prim)) |
725a69d2 | 3832 | and then not Is_Abstract_Subprogram (Alias (Prim)) |
3833 | and then not Is_Imported (Alias (Prim)) | |
3834 | and then Find_Dispatching_Type | |
a652dd51 | 3835 | (Interface_Alias (Prim)) = Iface |
725a69d2 | 3836 | |
3837 | -- Generate the code of the thunk only if the abstract | |
3838 | -- interface type is not an immediate ancestor of | |
3839 | -- Tagged_Type; otherwise the DT associated with the | |
3840 | -- interface is the primary DT. | |
3841 | ||
a652dd51 | 3842 | and then not Is_Ancestor (Iface, Typ) |
725a69d2 | 3843 | then |
cdb1c38f | 3844 | if not Build_Thunks then |
725a69d2 | 3845 | Pos := |
a652dd51 | 3846 | UI_To_Int (DT_Position (Interface_Alias (Prim))); |
cdb1c38f | 3847 | Prim_Table (Pos) := Alias (Prim); |
3848 | else | |
3849 | Expand_Interface_Thunk (Prim, Thunk_Id, Thunk_Code); | |
725a69d2 | 3850 | |
cdb1c38f | 3851 | if Present (Thunk_Id) then |
3852 | Pos := | |
a652dd51 | 3853 | UI_To_Int (DT_Position (Interface_Alias (Prim))); |
cdb1c38f | 3854 | |
3855 | Prim_Table (Pos) := Thunk_Id; | |
3856 | Append_To (Result, Thunk_Code); | |
3857 | end if; | |
725a69d2 | 3858 | end if; |
3859 | end if; | |
3860 | ||
3861 | Next_Elmt (Prim_Elmt); | |
3862 | end loop; | |
3863 | ||
3864 | for J in Prim_Table'Range loop | |
3865 | if Present (Prim_Table (J)) then | |
3866 | New_Node := | |
cc60bd16 | 3867 | Unchecked_Convert_To (RTE (RE_Prim_Ptr), |
acf97c11 | 3868 | Make_Attribute_Reference (Loc, |
3869 | Prefix => New_Reference_To (Prim_Table (J), Loc), | |
3870 | Attribute_Name => Name_Unrestricted_Access)); | |
725a69d2 | 3871 | else |
cc60bd16 | 3872 | New_Node := Make_Null (Loc); |
725a69d2 | 3873 | end if; |
3874 | ||
3875 | Append_To (Prim_Ops_Aggr_List, New_Node); | |
3876 | end loop; | |
3877 | end; | |
3878 | end if; | |
3879 | ||
cc60bd16 | 3880 | New_Node := |
725a69d2 | 3881 | Make_Aggregate (Loc, |
cc60bd16 | 3882 | Expressions => Prim_Ops_Aggr_List); |
3883 | ||
3884 | Append_To (DT_Aggr_List, New_Node); | |
3885 | ||
3886 | -- Remember aggregates initializing dispatch tables | |
3887 | ||
3888 | Append_Elmt (New_Node, DT_Aggr); | |
725a69d2 | 3889 | |
f301a57b | 3890 | -- Note: Secondary dispatch tables cannot be declared constant |
3891 | -- because the component Offset_To_Top is currently initialized | |
3892 | -- by the IP routine. | |
3893 | ||
725a69d2 | 3894 | Append_To (Result, |
3895 | Make_Object_Declaration (Loc, | |
3896 | Defining_Identifier => Iface_DT, | |
3897 | Aliased_Present => True, | |
f301a57b | 3898 | Constant_Present => False, |
3899 | ||
725a69d2 | 3900 | Object_Definition => |
3901 | Make_Subtype_Indication (Loc, | |
3902 | Subtype_Mark => New_Reference_To | |
3903 | (RTE (RE_Dispatch_Table_Wrapper), Loc), | |
3904 | Constraint => Make_Index_Or_Discriminant_Constraint (Loc, | |
3905 | Constraints => DT_Constr_List)), | |
3906 | ||
f301a57b | 3907 | Expression => |
3908 | Make_Aggregate (Loc, | |
3909 | Expressions => DT_Aggr_List))); | |
725a69d2 | 3910 | |
17e14451 | 3911 | Append_To (Result, |
3912 | Make_Attribute_Definition_Clause (Loc, | |
3913 | Name => New_Reference_To (Iface_DT, Loc), | |
3914 | Chars => Name_Alignment, | |
f301a57b | 3915 | |
17e14451 | 3916 | Expression => |
3917 | Make_Attribute_Reference (Loc, | |
f301a57b | 3918 | Prefix => |
17e14451 | 3919 | New_Reference_To (RTE (RE_Integer_Address), Loc), |
3920 | Attribute_Name => Name_Alignment))); | |
3921 | ||
f301a57b | 3922 | if Exporting_Table then |
3923 | Export_DT (Typ, Iface_DT, Suffix_Index); | |
3924 | ||
725a69d2 | 3925 | -- Generate code to create the pointer to the dispatch table |
3926 | ||
f301a57b | 3927 | -- Iface_DT_Ptr : Tag := Tag!(DT.Prims_Ptr'Address); |
725a69d2 | 3928 | |
f301a57b | 3929 | -- Note: This declaration is not added here if the table is exported |
3930 | -- because in such case Make_Tags has already added this declaration. | |
3931 | ||
3932 | else | |
3933 | Append_To (Result, | |
3934 | Make_Object_Declaration (Loc, | |
3935 | Defining_Identifier => Iface_DT_Ptr, | |
3936 | Constant_Present => True, | |
3937 | ||
3938 | Object_Definition => | |
3939 | New_Reference_To (RTE (RE_Interface_Tag), Loc), | |
3940 | ||
3941 | Expression => | |
3942 | Unchecked_Convert_To (RTE (RE_Interface_Tag), | |
3943 | Make_Attribute_Reference (Loc, | |
3944 | Prefix => | |
3945 | Make_Selected_Component (Loc, | |
3946 | Prefix => New_Reference_To (Iface_DT, Loc), | |
3947 | Selector_Name => | |
3948 | New_Occurrence_Of | |
3949 | (RTE_Record_Component (RE_Prims_Ptr), Loc)), | |
3950 | Attribute_Name => Name_Address)))); | |
3951 | end if; | |
725a69d2 | 3952 | |
acf97c11 | 3953 | Append_To (Result, |
3954 | Make_Object_Declaration (Loc, | |
3955 | Defining_Identifier => Predef_Prims_Ptr, | |
3956 | Constant_Present => True, | |
f301a57b | 3957 | |
3958 | Object_Definition => | |
acf97c11 | 3959 | New_Reference_To (RTE (RE_Address), Loc), |
f301a57b | 3960 | |
3961 | Expression => | |
acf97c11 | 3962 | Make_Attribute_Reference (Loc, |
f301a57b | 3963 | Prefix => |
acf97c11 | 3964 | Make_Selected_Component (Loc, |
f301a57b | 3965 | Prefix => New_Reference_To (Iface_DT, Loc), |
3966 | Selector_Name => | |
3967 | New_Occurrence_Of | |
3968 | (RTE_Record_Component (RE_Predef_Prims), Loc)), | |
acf97c11 | 3969 | Attribute_Name => Name_Address))); |
3970 | ||
cc60bd16 | 3971 | -- Remember entities containing dispatch tables |
acf97c11 | 3972 | |
cc60bd16 | 3973 | Append_Elmt (Predef_Prims, DT_Decl); |
3974 | Append_Elmt (Iface_DT, DT_Decl); | |
725a69d2 | 3975 | end Make_Secondary_DT; |
3976 | ||
3977 | -- Local variables | |
3978 | ||
2ea346ac | 3979 | Elab_Code : constant List_Id := New_List; |
3980 | Result : constant List_Id := New_List; | |
3981 | Tname : constant Name_Id := Chars (Typ); | |
725a69d2 | 3982 | AI : Elmt_Id; |
cdb1c38f | 3983 | AI_Tag_Elmt : Elmt_Id; |
24971415 | 3984 | AI_Tag_Comp : Elmt_Id; |
f9162257 | 3985 | DT_Aggr_List : List_Id; |
24971415 | 3986 | DT_Constr_List : List_Id; |
725a69d2 | 3987 | DT_Ptr : Entity_Id; |
725a69d2 | 3988 | ITable : Node_Id; |
3989 | I_Depth : Nat := 0; | |
3990 | Iface_Table_Node : Node_Id; | |
3991 | Name_ITable : Name_Id; | |
725a69d2 | 3992 | Nb_Predef_Prims : Nat := 0; |
3993 | Nb_Prim : Nat := 0; | |
3994 | New_Node : Node_Id; | |
725a69d2 | 3995 | Num_Ifaces : Nat := 0; |
cc60bd16 | 3996 | Parent_Typ : Entity_Id; |
725a69d2 | 3997 | Prim : Entity_Id; |
3998 | Prim_Elmt : Elmt_Id; | |
3999 | Prim_Ops_Aggr_List : List_Id; | |
725a69d2 | 4000 | Suffix_Index : Int; |
4001 | Typ_Comps : Elist_Id; | |
4002 | Typ_Ifaces : Elist_Id; | |
4003 | TSD_Aggr_List : List_Id; | |
4004 | TSD_Tags_List : List_Id; | |
17e14451 | 4005 | |
4006 | -- The following name entries are used by Make_DT to generate a number | |
4007 | -- of entities related to a tagged type. These entities may be generated | |
4008 | -- in a scope other than that of the tagged type declaration, and if | |
4009 | -- the entities for two tagged types with the same name happen to be | |
4010 | -- generated in the same scope, we have to take care to use different | |
4011 | -- names. This is achieved by means of a unique serial number appended | |
4012 | -- to each generated entity name. | |
4013 | ||
4014 | Name_DT : constant Name_Id := | |
4015 | New_External_Name (Tname, 'T', Suffix_Index => -1); | |
4016 | Name_Exname : constant Name_Id := | |
4017 | New_External_Name (Tname, 'E', Suffix_Index => -1); | |
e7e688dd | 4018 | Name_HT_Link : constant Name_Id := |
4019 | New_External_Name (Tname, 'H', Suffix_Index => -1); | |
17e14451 | 4020 | Name_Predef_Prims : constant Name_Id := |
4021 | New_External_Name (Tname, 'R', Suffix_Index => -1); | |
4022 | Name_SSD : constant Name_Id := | |
4023 | New_External_Name (Tname, 'S', Suffix_Index => -1); | |
4024 | Name_TSD : constant Name_Id := | |
4025 | New_External_Name (Tname, 'B', Suffix_Index => -1); | |
4026 | ||
4027 | -- Entities built with above names | |
4028 | ||
4029 | DT : constant Entity_Id := | |
4030 | Make_Defining_Identifier (Loc, Name_DT); | |
4031 | Exname : constant Entity_Id := | |
4032 | Make_Defining_Identifier (Loc, Name_Exname); | |
e7e688dd | 4033 | HT_Link : constant Entity_Id := |
4034 | Make_Defining_Identifier (Loc, Name_HT_Link); | |
17e14451 | 4035 | Predef_Prims : constant Entity_Id := |
4036 | Make_Defining_Identifier (Loc, Name_Predef_Prims); | |
4037 | SSD : constant Entity_Id := | |
4038 | Make_Defining_Identifier (Loc, Name_SSD); | |
4039 | TSD : constant Entity_Id := | |
4040 | Make_Defining_Identifier (Loc, Name_TSD); | |
725a69d2 | 4041 | |
4042 | -- Start of processing for Make_DT | |
4043 | ||
4044 | begin | |
17e14451 | 4045 | pragma Assert (Is_Frozen (Typ)); |
725a69d2 | 4046 | |
17e14451 | 4047 | -- Handle cases in which there is no need to build the dispatch table |
725a69d2 | 4048 | |
17e14451 | 4049 | if Has_Dispatch_Table (Typ) |
4050 | or else No (Access_Disp_Table (Typ)) | |
4051 | or else Is_CPP_Class (Typ) | |
4052 | then | |
725a69d2 | 4053 | return Result; |
725a69d2 | 4054 | |
17e14451 | 4055 | elsif No_Run_Time_Mode then |
4056 | Error_Msg_CRT ("tagged types", Typ); | |
4057 | return Result; | |
725a69d2 | 4058 | |
17e14451 | 4059 | elsif not RTE_Available (RE_Tag) then |
725a69d2 | 4060 | Append_To (Result, |
4061 | Make_Object_Declaration (Loc, | |
17e14451 | 4062 | Defining_Identifier => Node (First_Elmt |
4063 | (Access_Disp_Table (Typ))), | |
725a69d2 | 4064 | Object_Definition => New_Reference_To (RTE (RE_Tag), Loc), |
4065 | Constant_Present => True, | |
4066 | Expression => | |
24971415 | 4067 | Unchecked_Convert_To (RTE (RE_Tag), |
725a69d2 | 4068 | New_Reference_To (RTE (RE_Null_Address), Loc)))); |
4069 | ||
4070 | Analyze_List (Result, Suppress => All_Checks); | |
4071 | Error_Msg_CRT ("tagged types", Typ); | |
4072 | return Result; | |
4073 | end if; | |
4074 | ||
17e14451 | 4075 | -- Ensure that the value of Max_Predef_Prims defined in a-tags is |
cdb1c38f | 4076 | -- correct. Valid values are 10 under configurable runtime or 16 |
17e14451 | 4077 | -- with full runtime. |
4078 | ||
4079 | if RTE_Available (RE_Interface_Data) then | |
cdb1c38f | 4080 | if Max_Predef_Prims /= 16 then |
17e14451 | 4081 | Error_Msg_N ("run-time library configuration error", Typ); |
4082 | return Result; | |
4083 | end if; | |
725a69d2 | 4084 | else |
17e14451 | 4085 | if Max_Predef_Prims /= 10 then |
4086 | Error_Msg_N ("run-time library configuration error", Typ); | |
4087 | Error_Msg_CRT ("tagged types", Typ); | |
4088 | return Result; | |
4089 | end if; | |
725a69d2 | 4090 | end if; |
4091 | ||
cc60bd16 | 4092 | -- Initialize Parent_Typ handling private types |
4093 | ||
4094 | Parent_Typ := Etype (Typ); | |
4095 | ||
4096 | if Present (Full_View (Parent_Typ)) then | |
4097 | Parent_Typ := Full_View (Parent_Typ); | |
4098 | end if; | |
4099 | ||
17e14451 | 4100 | -- Ensure that all the primitives are frozen. This is only required when |
4101 | -- building static dispatch tables --- the primitives must be frozen to | |
4102 | -- be referenced (otherwise we have problems with the backend). It is | |
4103 | -- not a requirement with nonstatic dispatch tables because in this case | |
4104 | -- we generate now an empty dispatch table; the extra code required to | |
24971415 | 4105 | -- register the primitives in the slots will be generated later --- when |
17e14451 | 4106 | -- each primitive is frozen (see Freeze_Subprogram). |
725a69d2 | 4107 | |
24971415 | 4108 | if Building_Static_DT (Typ) |
17e14451 | 4109 | and then not Is_CPP_Class (Typ) |
4110 | then | |
4111 | declare | |
4112 | Save : constant Boolean := Freezing_Library_Level_Tagged_Type; | |
555c63a6 | 4113 | Prim : Entity_Id; |
17e14451 | 4114 | Prim_Elmt : Elmt_Id; |
4115 | Frnodes : List_Id; | |
725a69d2 | 4116 | |
17e14451 | 4117 | begin |
4118 | Freezing_Library_Level_Tagged_Type := True; | |
555c63a6 | 4119 | |
17e14451 | 4120 | Prim_Elmt := First_Elmt (Primitive_Operations (Typ)); |
4121 | while Present (Prim_Elmt) loop | |
555c63a6 | 4122 | Prim := Node (Prim_Elmt); |
4123 | Frnodes := Freeze_Entity (Prim, Loc); | |
725a69d2 | 4124 | |
17e14451 | 4125 | declare |
17e14451 | 4126 | F : Entity_Id; |
725a69d2 | 4127 | |
17e14451 | 4128 | begin |
555c63a6 | 4129 | F := First_Formal (Prim); |
17e14451 | 4130 | while Present (F) loop |
555c63a6 | 4131 | Check_Premature_Freezing (Prim, Etype (F)); |
17e14451 | 4132 | Next_Formal (F); |
4133 | end loop; | |
4134 | ||
555c63a6 | 4135 | Check_Premature_Freezing (Prim, Etype (Prim)); |
17e14451 | 4136 | end; |
4137 | ||
4138 | if Present (Frnodes) then | |
4139 | Append_List_To (Result, Frnodes); | |
4140 | end if; | |
4141 | ||
4142 | Next_Elmt (Prim_Elmt); | |
4143 | end loop; | |
555c63a6 | 4144 | |
17e14451 | 4145 | Freezing_Library_Level_Tagged_Type := Save; |
4146 | end; | |
4147 | end if; | |
725a69d2 | 4148 | |
17e14451 | 4149 | -- Ada 2005 (AI-251): Build the secondary dispatch tables |
4150 | ||
a652dd51 | 4151 | if Has_Interfaces (Typ) then |
17e14451 | 4152 | Collect_Interface_Components (Typ, Typ_Comps); |
4153 | ||
f301a57b | 4154 | -- Each secondary dispatch table is assigned an unique positive |
4155 | -- suffix index; such value also corresponds with the location of | |
4156 | -- its entity in the Dispatch_Table_Wrappers list (see Make_Tags). | |
4157 | ||
4158 | -- Note: This value must be kept sync with the Suffix_Index values | |
4159 | -- generated by Make_Tags | |
4160 | ||
4161 | Suffix_Index := 1; | |
acf97c11 | 4162 | AI_Tag_Elmt := |
4163 | Next_Elmt (Next_Elmt (First_Elmt (Access_Disp_Table (Typ)))); | |
17e14451 | 4164 | |
4165 | AI_Tag_Comp := First_Elmt (Typ_Comps); | |
4166 | while Present (AI_Tag_Comp) loop | |
cdb1c38f | 4167 | |
4168 | -- Build the secondary table containing pointers to thunks | |
4169 | ||
17e14451 | 4170 | Make_Secondary_DT |
cdb1c38f | 4171 | (Typ => Typ, |
4172 | Iface => Base_Type (Related_Type (Node (AI_Tag_Comp))), | |
f301a57b | 4173 | Suffix_Index => Suffix_Index, |
cdb1c38f | 4174 | Num_Iface_Prims => UI_To_Int |
4175 | (DT_Entry_Count (Node (AI_Tag_Comp))), | |
4176 | Iface_DT_Ptr => Node (AI_Tag_Elmt), | |
acf97c11 | 4177 | Predef_Prims_Ptr => Node (Next_Elmt (AI_Tag_Elmt)), |
cdb1c38f | 4178 | Build_Thunks => True, |
4179 | Result => Result); | |
cdb1c38f | 4180 | |
f301a57b | 4181 | -- Skip secondary dispatch table and secondary dispatch table of |
4182 | -- predefined primitives | |
acf97c11 | 4183 | |
f301a57b | 4184 | Next_Elmt (AI_Tag_Elmt); |
acf97c11 | 4185 | Next_Elmt (AI_Tag_Elmt); |
4186 | ||
36b938a3 | 4187 | -- Build the secondary table containing pointers to primitives |
cdb1c38f | 4188 | -- (used to give support to Generic Dispatching Constructors). |
4189 | ||
4190 | Make_Secondary_DT | |
4191 | (Typ => Typ, | |
4192 | Iface => Base_Type (Related_Type (Node (AI_Tag_Comp))), | |
f301a57b | 4193 | Suffix_Index => -1, |
cdb1c38f | 4194 | Num_Iface_Prims => UI_To_Int |
4195 | (DT_Entry_Count (Node (AI_Tag_Comp))), | |
4196 | Iface_DT_Ptr => Node (AI_Tag_Elmt), | |
acf97c11 | 4197 | Predef_Prims_Ptr => Node (Next_Elmt (AI_Tag_Elmt)), |
cdb1c38f | 4198 | Build_Thunks => False, |
4199 | Result => Result); | |
725a69d2 | 4200 | |
f301a57b | 4201 | -- Skip secondary dispatch table and secondary dispatch table of |
4202 | -- predefined primitives | |
acf97c11 | 4203 | |
f301a57b | 4204 | Next_Elmt (AI_Tag_Elmt); |
acf97c11 | 4205 | Next_Elmt (AI_Tag_Elmt); |
4206 | ||
17e14451 | 4207 | Suffix_Index := Suffix_Index + 1; |
17e14451 | 4208 | Next_Elmt (AI_Tag_Comp); |
4209 | end loop; | |
4210 | end if; | |
725a69d2 | 4211 | |
24971415 | 4212 | -- Get the _tag entity and the number of primitives of its dispatch |
4213 | -- table. | |
725a69d2 | 4214 | |
24971415 | 4215 | DT_Ptr := Node (First_Elmt (Access_Disp_Table (Typ))); |
4216 | Nb_Prim := UI_To_Int (DT_Entry_Count (First_Tag_Component (Typ))); | |
725a69d2 | 4217 | |
2ea346ac | 4218 | Set_Is_Statically_Allocated (DT, Is_Library_Level_Tagged_Type (Typ)); |
4219 | Set_Is_Statically_Allocated (SSD, Is_Library_Level_Tagged_Type (Typ)); | |
4220 | Set_Is_Statically_Allocated (TSD, Is_Library_Level_Tagged_Type (Typ)); | |
4221 | Set_Is_Statically_Allocated (Predef_Prims, | |
4222 | Is_Library_Level_Tagged_Type (Typ)); | |
725a69d2 | 4223 | |
4224 | -- In case of locally defined tagged type we declare the object | |
36b938a3 | 4225 | -- containing the dispatch table by means of a variable. Its |
725a69d2 | 4226 | -- initialization is done later by means of an assignment. This is |
4227 | -- required to generate its External_Tag. | |
4228 | ||
24971415 | 4229 | if not Building_Static_DT (Typ) then |
725a69d2 | 4230 | |
4231 | -- Generate: | |
4232 | -- DT : No_Dispatch_Table_Wrapper; | |
17e14451 | 4233 | -- for DT'Alignment use Address'Alignment; |
725a69d2 | 4234 | -- DT_Ptr : Tag := !Tag (DT.NDT_Prims_Ptr'Address); |
4235 | ||
24971415 | 4236 | if not Has_DT (Typ) then |
725a69d2 | 4237 | Append_To (Result, |
4238 | Make_Object_Declaration (Loc, | |
4239 | Defining_Identifier => DT, | |
4240 | Aliased_Present => True, | |
4241 | Constant_Present => False, | |
4242 | Object_Definition => | |
4243 | New_Reference_To | |
4244 | (RTE (RE_No_Dispatch_Table_Wrapper), Loc))); | |
4245 | ||
9af28f61 | 4246 | -- Comment needed ??? |
4247 | ||
3dbca0d5 | 4248 | if Generate_SCIL then |
4249 | Insert_Before (Last (Result), | |
4250 | New_Scil_Node | |
4251 | (Nkind => Dispatch_Table_Object_Init, | |
4252 | Related_Node => Last (Result), | |
4253 | Entity => Typ)); | |
4254 | end if; | |
4255 | ||
17e14451 | 4256 | Append_To (Result, |
4257 | Make_Attribute_Definition_Clause (Loc, | |
4258 | Name => New_Reference_To (DT, Loc), | |
4259 | Chars => Name_Alignment, | |
4260 | Expression => | |
4261 | Make_Attribute_Reference (Loc, | |
4262 | Prefix => | |
4263 | New_Reference_To (RTE (RE_Integer_Address), Loc), | |
4264 | Attribute_Name => Name_Alignment))); | |
4265 | ||
725a69d2 | 4266 | Append_To (Result, |
4267 | Make_Object_Declaration (Loc, | |
4268 | Defining_Identifier => DT_Ptr, | |
4269 | Object_Definition => New_Reference_To (RTE (RE_Tag), Loc), | |
4270 | Constant_Present => True, | |
4271 | Expression => | |
24971415 | 4272 | Unchecked_Convert_To (RTE (RE_Tag), |
725a69d2 | 4273 | Make_Attribute_Reference (Loc, |
4274 | Prefix => | |
4275 | Make_Selected_Component (Loc, | |
4276 | Prefix => New_Reference_To (DT, Loc), | |
4277 | Selector_Name => | |
4278 | New_Occurrence_Of | |
4279 | (RTE_Record_Component (RE_NDT_Prims_Ptr), Loc)), | |
4280 | Attribute_Name => Name_Address)))); | |
4281 | ||
3dbca0d5 | 4282 | if Generate_SCIL then |
4283 | Insert_Before (Last (Result), | |
4284 | New_Scil_Node | |
4285 | (Nkind => Dispatch_Table_Tag_Init, | |
4286 | Related_Node => Last (Result), | |
4287 | Entity => Typ)); | |
4288 | end if; | |
4289 | ||
725a69d2 | 4290 | -- Generate: |
4291 | -- DT : Dispatch_Table_Wrapper (Nb_Prim); | |
4292 | -- for DT'Alignment use Address'Alignment; | |
4293 | -- DT_Ptr : Tag := !Tag (DT.Prims_Ptr'Address); | |
4294 | ||
4295 | else | |
4296 | -- If the tagged type has no primitives we add a dummy slot | |
4297 | -- whose address will be the tag of this type. | |
4298 | ||
4299 | if Nb_Prim = 0 then | |
4300 | DT_Constr_List := | |
4301 | New_List (Make_Integer_Literal (Loc, 1)); | |
4302 | else | |
4303 | DT_Constr_List := | |
4304 | New_List (Make_Integer_Literal (Loc, Nb_Prim)); | |
4305 | end if; | |
4306 | ||
4307 | Append_To (Result, | |
4308 | Make_Object_Declaration (Loc, | |
4309 | Defining_Identifier => DT, | |
4310 | Aliased_Present => True, | |
4311 | Constant_Present => False, | |
4312 | Object_Definition => | |
4313 | Make_Subtype_Indication (Loc, | |
4314 | Subtype_Mark => | |
4315 | New_Reference_To (RTE (RE_Dispatch_Table_Wrapper), Loc), | |
4316 | Constraint => Make_Index_Or_Discriminant_Constraint (Loc, | |
4317 | Constraints => DT_Constr_List)))); | |
4318 | ||
9af28f61 | 4319 | -- Comment needed ??? |
4320 | ||
3dbca0d5 | 4321 | if Generate_SCIL then |
4322 | Insert_Before (Last (Result), | |
4323 | New_Scil_Node | |
4324 | (Nkind => Dispatch_Table_Object_Init, | |
4325 | Related_Node => Last (Result), | |
4326 | Entity => Typ)); | |
4327 | end if; | |
4328 | ||
725a69d2 | 4329 | Append_To (Result, |
4330 | Make_Attribute_Definition_Clause (Loc, | |
4331 | Name => New_Reference_To (DT, Loc), | |
4332 | Chars => Name_Alignment, | |
4333 | Expression => | |
4334 | Make_Attribute_Reference (Loc, | |
4335 | Prefix => | |
4336 | New_Reference_To (RTE (RE_Integer_Address), Loc), | |
4337 | Attribute_Name => Name_Alignment))); | |
4338 | ||
4339 | Append_To (Result, | |
4340 | Make_Object_Declaration (Loc, | |
4341 | Defining_Identifier => DT_Ptr, | |
4342 | Object_Definition => New_Reference_To (RTE (RE_Tag), Loc), | |
4343 | Constant_Present => True, | |
4344 | Expression => | |
24971415 | 4345 | Unchecked_Convert_To (RTE (RE_Tag), |
725a69d2 | 4346 | Make_Attribute_Reference (Loc, |
4347 | Prefix => | |
4348 | Make_Selected_Component (Loc, | |
4349 | Prefix => New_Reference_To (DT, Loc), | |
4350 | Selector_Name => | |
4351 | New_Occurrence_Of | |
4352 | (RTE_Record_Component (RE_Prims_Ptr), Loc)), | |
4353 | Attribute_Name => Name_Address)))); | |
acf97c11 | 4354 | |
9af28f61 | 4355 | -- Comment needed ??? |
4356 | ||
3dbca0d5 | 4357 | if Generate_SCIL then |
4358 | Insert_Before (Last (Result), | |
4359 | New_Scil_Node | |
4360 | (Nkind => Dispatch_Table_Tag_Init, | |
4361 | Related_Node => Last (Result), | |
4362 | Entity => Typ)); | |
4363 | end if; | |
4364 | ||
acf97c11 | 4365 | Append_To (Result, |
4366 | Make_Object_Declaration (Loc, | |
4367 | Defining_Identifier => | |
4368 | Node (Next_Elmt (First_Elmt (Access_Disp_Table (Typ)))), | |
4369 | Constant_Present => True, | |
4370 | Object_Definition => New_Reference_To | |
4371 | (RTE (RE_Address), Loc), | |
4372 | Expression => | |
4373 | Make_Attribute_Reference (Loc, | |
4374 | Prefix => | |
4375 | Make_Selected_Component (Loc, | |
4376 | Prefix => New_Reference_To (DT, Loc), | |
4377 | Selector_Name => | |
4378 | New_Occurrence_Of | |
4379 | (RTE_Record_Component (RE_Predef_Prims), Loc)), | |
4380 | Attribute_Name => Name_Address))); | |
725a69d2 | 4381 | end if; |
4382 | end if; | |
4383 | ||
4384 | -- Generate: Exname : constant String := full_qualified_name (typ); | |
343d35dc | 4385 | -- The type itself may be an anonymous parent type, so use the first |
4386 | -- subtype to have a user-recognizable name. | |
d62940bf | 4387 | |
343d35dc | 4388 | Append_To (Result, |
4389 | Make_Object_Declaration (Loc, | |
4390 | Defining_Identifier => Exname, | |
4391 | Constant_Present => True, | |
4392 | Object_Definition => New_Reference_To (Standard_String, Loc), | |
4393 | Expression => | |
4394 | Make_String_Literal (Loc, | |
4395 | Full_Qualified_Name (First_Subtype (Typ))))); | |
d62940bf | 4396 | |
24971415 | 4397 | Set_Is_Statically_Allocated (Exname); |
4398 | Set_Is_True_Constant (Exname); | |
4399 | ||
e7e688dd | 4400 | -- Declare the object used by Ada.Tags.Register_Tag |
4401 | ||
4402 | if RTE_Available (RE_Register_Tag) then | |
4403 | Append_To (Result, | |
4404 | Make_Object_Declaration (Loc, | |
4405 | Defining_Identifier => HT_Link, | |
4406 | Object_Definition => New_Reference_To (RTE (RE_Tag), Loc))); | |
4407 | end if; | |
4408 | ||
725a69d2 | 4409 | -- Generate code to create the storage for the type specific data object |
4410 | -- with enough space to store the tags of the ancestors plus the tags | |
4411 | -- of all the implemented interfaces (as described in a-tags.adb). | |
4412 | ||
4413 | -- TSD : Type_Specific_Data (I_Depth) := | |
4414 | -- (Idepth => I_Depth, | |
4415 | -- Access_Level => Type_Access_Level (Typ), | |
4416 | -- Expanded_Name => Cstring_Ptr!(Exname'Address)) | |
4417 | -- External_Tag => Cstring_Ptr!(Exname'Address)) | |
e7e688dd | 4418 | -- HT_Link => HT_Link'Address, |
725a69d2 | 4419 | -- Transportable => <<boolean-value>>, |
4420 | -- RC_Offset => <<integer-value>>, | |
cc60bd16 | 4421 | -- [ Size_Func => Size_Prim'Access ] |
725a69d2 | 4422 | -- [ Interfaces_Table => <<access-value>> ] |
24971415 | 4423 | -- [ SSD => SSD_Table'Address ] |
725a69d2 | 4424 | -- Tags_Table => (0 => null, |
4425 | -- 1 => Parent'Tag | |
4426 | -- ...); | |
4427 | -- for TSD'Alignment use Address'Alignment | |
4428 | ||
4429 | TSD_Aggr_List := New_List; | |
4430 | ||
4431 | -- Idepth: Count ancestors to compute the inheritance depth. For private | |
4432 | -- extensions, always go to the full view in order to compute the real | |
4433 | -- inheritance depth. | |
4434 | ||
4435 | declare | |
4436 | Current_Typ : Entity_Id; | |
4437 | Parent_Typ : Entity_Id; | |
4438 | ||
4439 | begin | |
4440 | I_Depth := 0; | |
4441 | Current_Typ := Typ; | |
4442 | loop | |
4443 | Parent_Typ := Etype (Current_Typ); | |
4444 | ||
4445 | if Is_Private_Type (Parent_Typ) then | |
4446 | Parent_Typ := Full_View (Base_Type (Parent_Typ)); | |
4447 | end if; | |
4448 | ||
4449 | exit when Parent_Typ = Current_Typ; | |
4450 | ||
4451 | I_Depth := I_Depth + 1; | |
4452 | Current_Typ := Parent_Typ; | |
4453 | end loop; | |
4454 | end; | |
4455 | ||
4456 | Append_To (TSD_Aggr_List, | |
17e14451 | 4457 | Make_Integer_Literal (Loc, I_Depth)); |
725a69d2 | 4458 | |
4459 | -- Access_Level | |
4460 | ||
4461 | Append_To (TSD_Aggr_List, | |
17e14451 | 4462 | Make_Integer_Literal (Loc, Type_Access_Level (Typ))); |
725a69d2 | 4463 | |
4464 | -- Expanded_Name | |
4465 | ||
4466 | Append_To (TSD_Aggr_List, | |
17e14451 | 4467 | Unchecked_Convert_To (RTE (RE_Cstring_Ptr), |
4468 | Make_Attribute_Reference (Loc, | |
4469 | Prefix => New_Reference_To (Exname, Loc), | |
4470 | Attribute_Name => Name_Address))); | |
725a69d2 | 4471 | |
4472 | -- External_Tag of a local tagged type | |
4473 | ||
17e14451 | 4474 | -- <typ>A : constant String := |
725a69d2 | 4475 | -- "Internal tag at 16#tag-addr#: <full-name-of-typ>"; |
4476 | ||
4477 | -- The reason we generate this strange name is that we do not want to | |
4478 | -- enter local tagged types in the global hash table used to compute | |
4479 | -- the Internal_Tag attribute for two reasons: | |
4480 | ||
4481 | -- 1. It is hard to avoid a tasking race condition for entering the | |
4482 | -- entry into the hash table. | |
4483 | ||
4484 | -- 2. It would cause a storage leak, unless we rig up considerable | |
4485 | -- mechanism to remove the entry from the hash table on exit. | |
4486 | ||
4487 | -- So what we do is to generate the above external tag name, where the | |
4488 | -- hex address is the address of the local dispatch table (i.e. exactly | |
4489 | -- the value we want if Internal_Tag is computed from this string). | |
4490 | ||
4491 | -- Of course this value will only be valid if the tagged type is still | |
4492 | -- in scope, but it clearly must be erroneous to compute the internal | |
4493 | -- tag of a tagged type that is out of scope! | |
4494 | ||
17e14451 | 4495 | -- We don't do this processing if an explicit external tag has been |
4496 | -- specified. That's an odd case for which we have already issued a | |
4497 | -- warning, where we will not be able to compute the internal tag. | |
4498 | ||
4499 | if not Is_Library_Level_Entity (Typ) | |
4500 | and then not Has_External_Tag_Rep_Clause (Typ) | |
4501 | then | |
725a69d2 | 4502 | declare |
725a69d2 | 4503 | Exname : constant Entity_Id := |
17e14451 | 4504 | Make_Defining_Identifier (Loc, |
4505 | New_External_Name (Tname, 'A')); | |
4506 | ||
725a69d2 | 4507 | Full_Name : constant String_Id := |
4508 | Full_Qualified_Name (First_Subtype (Typ)); | |
4509 | Str1_Id : String_Id; | |
4510 | Str2_Id : String_Id; | |
725a69d2 | 4511 | |
4512 | begin | |
4513 | -- Generate: | |
17e14451 | 4514 | -- Str1 = "Internal tag at 16#"; |
725a69d2 | 4515 | |
4516 | Start_String; | |
4517 | Store_String_Chars ("Internal tag at 16#"); | |
4518 | Str1_Id := End_String; | |
4519 | ||
4520 | -- Generate: | |
17e14451 | 4521 | -- Str2 = "#: <type-full-name>"; |
725a69d2 | 4522 | |
4523 | Start_String; | |
4524 | Store_String_Chars ("#: "); | |
725a69d2 | 4525 | Store_String_Chars (Full_Name); |
17e14451 | 4526 | Str2_Id := End_String; |
725a69d2 | 4527 | |
4528 | -- Generate: | |
4529 | -- Exname : constant String := | |
17e14451 | 4530 | -- Str1 & Address_Image (Tag) & Str2; |
725a69d2 | 4531 | |
4532 | if RTE_Available (RE_Address_Image) then | |
4533 | Append_To (Result, | |
4534 | Make_Object_Declaration (Loc, | |
4535 | Defining_Identifier => Exname, | |
4536 | Constant_Present => True, | |
4537 | Object_Definition => New_Reference_To | |
4538 | (Standard_String, Loc), | |
4539 | Expression => | |
4540 | Make_Op_Concat (Loc, | |
4541 | Left_Opnd => | |
4542 | Make_String_Literal (Loc, Str1_Id), | |
4543 | Right_Opnd => | |
4544 | Make_Op_Concat (Loc, | |
4545 | Left_Opnd => | |
4546 | Make_Function_Call (Loc, | |
4547 | Name => | |
4548 | New_Reference_To | |
4549 | (RTE (RE_Address_Image), Loc), | |
4550 | Parameter_Associations => New_List ( | |
4551 | Unchecked_Convert_To (RTE (RE_Address), | |
4552 | New_Reference_To (DT_Ptr, Loc)))), | |
4553 | Right_Opnd => | |
17e14451 | 4554 | Make_String_Literal (Loc, Str2_Id))))); |
4555 | ||
725a69d2 | 4556 | else |
4557 | Append_To (Result, | |
4558 | Make_Object_Declaration (Loc, | |
4559 | Defining_Identifier => Exname, | |
4560 | Constant_Present => True, | |
4561 | Object_Definition => New_Reference_To | |
4562 | (Standard_String, Loc), | |
4563 | Expression => | |
4564 | Make_Op_Concat (Loc, | |
4565 | Left_Opnd => | |
4566 | Make_String_Literal (Loc, Str1_Id), | |
4567 | Right_Opnd => | |
17e14451 | 4568 | Make_String_Literal (Loc, Str2_Id)))); |
725a69d2 | 4569 | end if; |
4570 | ||
4571 | New_Node := | |
4572 | Unchecked_Convert_To (RTE (RE_Cstring_Ptr), | |
4573 | Make_Attribute_Reference (Loc, | |
4574 | Prefix => New_Reference_To (Exname, Loc), | |
4575 | Attribute_Name => Name_Address)); | |
4576 | end; | |
4577 | ||
4578 | -- External tag of a library-level tagged type: Check for a definition | |
4579 | -- of External_Tag. The clause is considered only if it applies to this | |
4580 | -- specific tagged type, as opposed to one of its ancestors. | |
cc60bd16 | 4581 | -- If the type is an unconstrained type extension, we are building the |
4582 | -- dispatch table of its anonymous base type, so the external tag, if | |
34fd8639 | 4583 | -- any was specified, must be retrieved from the first subtype. Go to |
4584 | -- the full view in case the clause is in the private part. | |
725a69d2 | 4585 | |
4586 | else | |
4587 | declare | |
cc60bd16 | 4588 | Def : constant Node_Id := Get_Attribute_Definition_Clause |
34fd8639 | 4589 | (Underlying_Type (First_Subtype (Typ)), |
cc60bd16 | 4590 | Attribute_External_Tag); |
4591 | ||
725a69d2 | 4592 | Old_Val : String_Id; |
4593 | New_Val : String_Id; | |
4594 | E : Entity_Id; | |
4595 | ||
4596 | begin | |
4597 | if not Present (Def) | |
cc60bd16 | 4598 | or else Entity (Name (Def)) /= First_Subtype (Typ) |
725a69d2 | 4599 | then |
4600 | New_Node := | |
4601 | Unchecked_Convert_To (RTE (RE_Cstring_Ptr), | |
4602 | Make_Attribute_Reference (Loc, | |
cc60bd16 | 4603 | Prefix => New_Reference_To (Exname, Loc), |
725a69d2 | 4604 | Attribute_Name => Name_Address)); |
4605 | else | |
4606 | Old_Val := Strval (Expr_Value_S (Expression (Def))); | |
4607 | ||
17e14451 | 4608 | -- For the rep clause "for <typ>'external_tag use y" generate: |
725a69d2 | 4609 | |
17e14451 | 4610 | -- <typ>A : constant string := y; |
4611 | -- | |
4612 | -- <typ>A'Address is used to set the External_Tag component | |
4613 | -- of the TSD | |
725a69d2 | 4614 | |
4615 | -- Create a new nul terminated string if it is not already | |
4616 | ||
4617 | if String_Length (Old_Val) > 0 | |
4618 | and then | |
4619 | Get_String_Char (Old_Val, String_Length (Old_Val)) = 0 | |
4620 | then | |
4621 | New_Val := Old_Val; | |
4622 | else | |
4623 | Start_String (Old_Val); | |
4624 | Store_String_Char (Get_Char_Code (ASCII.NUL)); | |
4625 | New_Val := End_String; | |
4626 | end if; | |
4627 | ||
4628 | E := Make_Defining_Identifier (Loc, | |
4629 | New_External_Name (Chars (Typ), 'A')); | |
4630 | ||
4631 | Append_To (Result, | |
4632 | Make_Object_Declaration (Loc, | |
4633 | Defining_Identifier => E, | |
4634 | Constant_Present => True, | |
4635 | Object_Definition => | |
4636 | New_Reference_To (Standard_String, Loc), | |
4637 | Expression => | |
4638 | Make_String_Literal (Loc, New_Val))); | |
4639 | ||
4640 | New_Node := | |
4641 | Unchecked_Convert_To (RTE (RE_Cstring_Ptr), | |
4642 | Make_Attribute_Reference (Loc, | |
4643 | Prefix => New_Reference_To (E, Loc), | |
4644 | Attribute_Name => Name_Address)); | |
4645 | end if; | |
4646 | end; | |
4647 | end if; | |
4648 | ||
17e14451 | 4649 | Append_To (TSD_Aggr_List, New_Node); |
725a69d2 | 4650 | |
4651 | -- HT_Link | |
4652 | ||
e7e688dd | 4653 | if RTE_Available (RE_Register_Tag) then |
4654 | Append_To (TSD_Aggr_List, | |
4655 | Unchecked_Convert_To (RTE (RE_Tag_Ptr), | |
4656 | Make_Attribute_Reference (Loc, | |
4657 | Prefix => New_Reference_To (HT_Link, Loc), | |
4658 | Attribute_Name => Name_Address))); | |
4659 | else | |
4660 | Append_To (TSD_Aggr_List, | |
4661 | Unchecked_Convert_To (RTE (RE_Tag_Ptr), | |
4662 | New_Reference_To (RTE (RE_Null_Address), Loc))); | |
4663 | end if; | |
725a69d2 | 4664 | |
4665 | -- Transportable: Set for types that can be used in remote calls | |
4666 | -- with respect to E.4(18) legality rules. | |
4667 | ||
17e14451 | 4668 | declare |
4669 | Transportable : Entity_Id; | |
725a69d2 | 4670 | |
17e14451 | 4671 | begin |
4672 | Transportable := | |
4673 | Boolean_Literals | |
4674 | (Is_Pure (Typ) | |
4675 | or else Is_Shared_Passive (Typ) | |
4676 | or else | |
4677 | ((Is_Remote_Types (Typ) | |
4678 | or else Is_Remote_Call_Interface (Typ)) | |
4679 | and then Original_View_In_Visible_Part (Typ)) | |
4680 | or else not Comes_From_Source (Typ)); | |
4681 | ||
4682 | Append_To (TSD_Aggr_List, | |
4683 | New_Occurrence_Of (Transportable, Loc)); | |
4684 | end; | |
725a69d2 | 4685 | |
4686 | -- RC_Offset: These are the valid values and their meaning: | |
4687 | ||
343d35dc | 4688 | -- >0: For simple types with controlled components is |
4689 | -- type._record_controller'position | |
725a69d2 | 4690 | |
343d35dc | 4691 | -- 0: For types with no controlled components |
725a69d2 | 4692 | |
343d35dc | 4693 | -- -1: For complex types with controlled components where the position |
4694 | -- of the record controller is not statically computable but there | |
4695 | -- are controlled components at this level. The _Controller field | |
4696 | -- is available right after the _parent. | |
725a69d2 | 4697 | |
343d35dc | 4698 | -- -2: There are no controlled components at this level. We need to |
4699 | -- get the position from the parent. | |
952af0b9 | 4700 | |
17e14451 | 4701 | declare |
4702 | RC_Offset_Node : Node_Id; | |
343d35dc | 4703 | |
17e14451 | 4704 | begin |
4705 | if not Has_Controlled_Component (Typ) then | |
4706 | RC_Offset_Node := Make_Integer_Literal (Loc, 0); | |
4707 | ||
4708 | elsif Etype (Typ) /= Typ | |
cdb1c38f | 4709 | and then Has_Discriminants (Parent_Typ) |
17e14451 | 4710 | then |
4711 | if Has_New_Controlled_Component (Typ) then | |
4712 | RC_Offset_Node := Make_Integer_Literal (Loc, -1); | |
4713 | else | |
4714 | RC_Offset_Node := Make_Integer_Literal (Loc, -2); | |
4715 | end if; | |
343d35dc | 4716 | else |
17e14451 | 4717 | RC_Offset_Node := |
4718 | Make_Attribute_Reference (Loc, | |
4719 | Prefix => | |
4720 | Make_Selected_Component (Loc, | |
4721 | Prefix => New_Reference_To (Typ, Loc), | |
4722 | Selector_Name => | |
4723 | New_Reference_To (Controller_Component (Typ), Loc)), | |
4724 | Attribute_Name => Name_Position); | |
4725 | ||
4726 | -- This is not proper Ada code to use the attribute 'Position | |
4727 | -- on something else than an object but this is supported by | |
4728 | -- the back end (see comment on the Bit_Component attribute in | |
4729 | -- sem_attr). So we avoid semantic checking here. | |
4730 | ||
4731 | -- Is this documented in sinfo.ads??? it should be! | |
4732 | ||
4733 | Set_Analyzed (RC_Offset_Node); | |
4734 | Set_Etype (Prefix (RC_Offset_Node), RTE (RE_Record_Controller)); | |
4735 | Set_Etype (Prefix (Prefix (RC_Offset_Node)), Typ); | |
4736 | Set_Etype (Selector_Name (Prefix (RC_Offset_Node)), | |
4737 | RTE (RE_Record_Controller)); | |
4738 | Set_Etype (RC_Offset_Node, RTE (RE_Storage_Offset)); | |
68f95949 | 4739 | end if; |
952af0b9 | 4740 | |
17e14451 | 4741 | Append_To (TSD_Aggr_List, RC_Offset_Node); |
4742 | end; | |
725a69d2 | 4743 | |
cc60bd16 | 4744 | -- Size_Func |
4745 | ||
4746 | if RTE_Record_Component_Available (RE_Size_Func) then | |
4747 | if not Building_Static_DT (Typ) | |
4748 | or else Is_Interface (Typ) | |
4749 | then | |
4750 | Append_To (TSD_Aggr_List, | |
4751 | Unchecked_Convert_To (RTE (RE_Size_Ptr), | |
4752 | New_Reference_To (RTE (RE_Null_Address), Loc))); | |
4753 | ||
4754 | else | |
4755 | declare | |
4756 | Prim_Elmt : Elmt_Id; | |
4757 | Prim : Entity_Id; | |
4758 | ||
4759 | begin | |
4760 | Prim_Elmt := First_Elmt (Primitive_Operations (Typ)); | |
4761 | while Present (Prim_Elmt) loop | |
4762 | Prim := Node (Prim_Elmt); | |
4763 | ||
4764 | if Chars (Prim) = Name_uSize then | |
4765 | while Present (Alias (Prim)) loop | |
4766 | Prim := Alias (Prim); | |
4767 | end loop; | |
4768 | ||
4769 | if Is_Abstract_Subprogram (Prim) then | |
4770 | Append_To (TSD_Aggr_List, | |
4771 | Unchecked_Convert_To (RTE (RE_Size_Ptr), | |
4772 | New_Reference_To (RTE (RE_Null_Address), Loc))); | |
4773 | else | |
4774 | Append_To (TSD_Aggr_List, | |
4775 | Unchecked_Convert_To (RTE (RE_Size_Ptr), | |
4776 | Make_Attribute_Reference (Loc, | |
4777 | Prefix => New_Reference_To (Prim, Loc), | |
4778 | Attribute_Name => Name_Unrestricted_Access))); | |
4779 | end if; | |
4780 | ||
4781 | exit; | |
4782 | end if; | |
4783 | ||
4784 | Next_Elmt (Prim_Elmt); | |
4785 | end loop; | |
4786 | end; | |
4787 | end if; | |
4788 | end if; | |
4789 | ||
725a69d2 | 4790 | -- Interfaces_Table (required for AI-405) |
4791 | ||
4792 | if RTE_Record_Component_Available (RE_Interfaces_Table) then | |
4793 | ||
4794 | -- Count the number of interface types implemented by Typ | |
4795 | ||
a652dd51 | 4796 | Collect_Interfaces (Typ, Typ_Ifaces); |
725a69d2 | 4797 | |
4798 | AI := First_Elmt (Typ_Ifaces); | |
4799 | while Present (AI) loop | |
4800 | Num_Ifaces := Num_Ifaces + 1; | |
4801 | Next_Elmt (AI); | |
4802 | end loop; | |
952af0b9 | 4803 | |
343d35dc | 4804 | if Num_Ifaces = 0 then |
725a69d2 | 4805 | Iface_Table_Node := Make_Null (Loc); |
952af0b9 | 4806 | |
725a69d2 | 4807 | -- Generate the Interface_Table object |
343d35dc | 4808 | |
4809 | else | |
725a69d2 | 4810 | declare |
17e14451 | 4811 | TSD_Ifaces_List : constant List_Id := New_List; |
cdb1c38f | 4812 | Elmt : Elmt_Id; |
4813 | Sec_DT_Tag : Node_Id; | |
725a69d2 | 4814 | |
4815 | begin | |
4816 | AI := First_Elmt (Typ_Ifaces); | |
4817 | while Present (AI) loop | |
a652dd51 | 4818 | if Is_Ancestor (Node (AI), Typ) then |
cdb1c38f | 4819 | Sec_DT_Tag := |
4820 | New_Reference_To (DT_Ptr, Loc); | |
4821 | else | |
acf97c11 | 4822 | Elmt := |
4823 | Next_Elmt | |
4824 | (Next_Elmt (First_Elmt (Access_Disp_Table (Typ)))); | |
cdb1c38f | 4825 | pragma Assert (Has_Thunks (Node (Elmt))); |
4826 | ||
4827 | while Ekind (Node (Elmt)) = E_Constant | |
4828 | and then not | |
a652dd51 | 4829 | Is_Ancestor (Node (AI), Related_Type (Node (Elmt))) |
cdb1c38f | 4830 | loop |
4831 | pragma Assert (Has_Thunks (Node (Elmt))); | |
4832 | Next_Elmt (Elmt); | |
acf97c11 | 4833 | pragma Assert (Has_Thunks (Node (Elmt))); |
4834 | Next_Elmt (Elmt); | |
4835 | pragma Assert (not Has_Thunks (Node (Elmt))); | |
4836 | Next_Elmt (Elmt); | |
cdb1c38f | 4837 | pragma Assert (not Has_Thunks (Node (Elmt))); |
4838 | Next_Elmt (Elmt); | |
4839 | end loop; | |
4840 | ||
4841 | pragma Assert (Ekind (Node (Elmt)) = E_Constant | |
acf97c11 | 4842 | and then not |
4843 | Has_Thunks (Node (Next_Elmt (Next_Elmt (Elmt))))); | |
cdb1c38f | 4844 | Sec_DT_Tag := |
acf97c11 | 4845 | New_Reference_To (Node (Next_Elmt (Next_Elmt (Elmt))), |
4846 | Loc); | |
cdb1c38f | 4847 | end if; |
4848 | ||
17e14451 | 4849 | Append_To (TSD_Ifaces_List, |
4850 | Make_Aggregate (Loc, | |
4851 | Expressions => New_List ( | |
4852 | ||
4853 | -- Iface_Tag | |
4854 | ||
24971415 | 4855 | Unchecked_Convert_To (RTE (RE_Tag), |
725a69d2 | 4856 | New_Reference_To |
4857 | (Node (First_Elmt (Access_Disp_Table (Node (AI)))), | |
17e14451 | 4858 | Loc)), |
725a69d2 | 4859 | |
17e14451 | 4860 | -- Static_Offset_To_Top |
725a69d2 | 4861 | |
17e14451 | 4862 | New_Reference_To (Standard_True, Loc), |
725a69d2 | 4863 | |
17e14451 | 4864 | -- Offset_To_Top_Value |
4865 | ||
4866 | Make_Integer_Literal (Loc, 0), | |
4867 | ||
4868 | -- Offset_To_Top_Func | |
4869 | ||
cdb1c38f | 4870 | Make_Null (Loc), |
4871 | ||
4872 | -- Secondary_DT | |
4873 | ||
4874 | Unchecked_Convert_To (RTE (RE_Tag), Sec_DT_Tag) | |
4875 | ||
4876 | ))); | |
725a69d2 | 4877 | |
725a69d2 | 4878 | Next_Elmt (AI); |
4879 | end loop; | |
725a69d2 | 4880 | |
17e14451 | 4881 | Name_ITable := New_External_Name (Tname, 'I'); |
4882 | ITable := Make_Defining_Identifier (Loc, Name_ITable); | |
2ea346ac | 4883 | Set_Is_Statically_Allocated (ITable, |
4884 | Is_Library_Level_Tagged_Type (Typ)); | |
725a69d2 | 4885 | |
17e14451 | 4886 | -- The table of interfaces is not constant; its slots are |
4887 | -- filled at run-time by the IP routine using attribute | |
4888 | -- 'Position to know the location of the tag components | |
4889 | -- (and this attribute cannot be safely used before the | |
4890 | -- object is initialized). | |
725a69d2 | 4891 | |
17e14451 | 4892 | Append_To (Result, |
4893 | Make_Object_Declaration (Loc, | |
4894 | Defining_Identifier => ITable, | |
4895 | Aliased_Present => True, | |
4896 | Constant_Present => False, | |
4897 | Object_Definition => | |
4898 | Make_Subtype_Indication (Loc, | |
4899 | Subtype_Mark => | |
4900 | New_Reference_To (RTE (RE_Interface_Data), Loc), | |
4901 | Constraint => Make_Index_Or_Discriminant_Constraint | |
4902 | (Loc, | |
4903 | Constraints => New_List ( | |
4904 | Make_Integer_Literal (Loc, Num_Ifaces)))), | |
725a69d2 | 4905 | |
17e14451 | 4906 | Expression => Make_Aggregate (Loc, |
4907 | Expressions => New_List ( | |
4908 | Make_Integer_Literal (Loc, Num_Ifaces), | |
4909 | Make_Aggregate (Loc, | |
4910 | Expressions => TSD_Ifaces_List))))); | |
725a69d2 | 4911 | |
17e14451 | 4912 | Append_To (Result, |
4913 | Make_Attribute_Definition_Clause (Loc, | |
4914 | Name => New_Reference_To (ITable, Loc), | |
4915 | Chars => Name_Alignment, | |
4916 | Expression => | |
4917 | Make_Attribute_Reference (Loc, | |
4918 | Prefix => | |
4919 | New_Reference_To (RTE (RE_Integer_Address), Loc), | |
4920 | Attribute_Name => Name_Alignment))); | |
725a69d2 | 4921 | |
17e14451 | 4922 | Iface_Table_Node := |
4923 | Make_Attribute_Reference (Loc, | |
4924 | Prefix => New_Reference_To (ITable, Loc), | |
4925 | Attribute_Name => Name_Unchecked_Access); | |
4926 | end; | |
725a69d2 | 4927 | end if; |
4928 | ||
17e14451 | 4929 | Append_To (TSD_Aggr_List, Iface_Table_Node); |
725a69d2 | 4930 | end if; |
4931 | ||
4932 | -- Generate the Select Specific Data table for synchronized types that | |
4933 | -- implement synchronized interfaces. The size of the table is | |
4934 | -- constrained by the number of non-predefined primitive operations. | |
4935 | ||
4936 | if RTE_Record_Component_Available (RE_SSD) then | |
4937 | if Ada_Version >= Ada_05 | |
24971415 | 4938 | and then Has_DT (Typ) |
725a69d2 | 4939 | and then Is_Concurrent_Record_Type (Typ) |
a652dd51 | 4940 | and then Has_Interfaces (Typ) |
725a69d2 | 4941 | and then Nb_Prim > 0 |
4942 | and then not Is_Abstract_Type (Typ) | |
4943 | and then not Is_Controlled (Typ) | |
4944 | and then not Restriction_Active (No_Dispatching_Calls) | |
f38c8084 | 4945 | and then not Restriction_Active (No_Select_Statements) |
725a69d2 | 4946 | then |
343d35dc | 4947 | Append_To (Result, |
4948 | Make_Object_Declaration (Loc, | |
725a69d2 | 4949 | Defining_Identifier => SSD, |
343d35dc | 4950 | Aliased_Present => True, |
4951 | Object_Definition => | |
4952 | Make_Subtype_Indication (Loc, | |
725a69d2 | 4953 | Subtype_Mark => New_Reference_To ( |
4954 | RTE (RE_Select_Specific_Data), Loc), | |
4955 | Constraint => | |
4956 | Make_Index_Or_Discriminant_Constraint (Loc, | |
4957 | Constraints => New_List ( | |
4958 | Make_Integer_Literal (Loc, Nb_Prim)))))); | |
4959 | ||
17e14451 | 4960 | Append_To (Result, |
4961 | Make_Attribute_Definition_Clause (Loc, | |
4962 | Name => New_Reference_To (SSD, Loc), | |
4963 | Chars => Name_Alignment, | |
4964 | Expression => | |
4965 | Make_Attribute_Reference (Loc, | |
4966 | Prefix => | |
4967 | New_Reference_To (RTE (RE_Integer_Address), Loc), | |
4968 | Attribute_Name => Name_Alignment))); | |
4969 | ||
725a69d2 | 4970 | -- This table is initialized by Make_Select_Specific_Data_Table, |
4971 | -- which calls Set_Entry_Index and Set_Prim_Op_Kind. | |
4972 | ||
4973 | Append_To (TSD_Aggr_List, | |
17e14451 | 4974 | Make_Attribute_Reference (Loc, |
4975 | Prefix => New_Reference_To (SSD, Loc), | |
4976 | Attribute_Name => Name_Unchecked_Access)); | |
725a69d2 | 4977 | else |
17e14451 | 4978 | Append_To (TSD_Aggr_List, Make_Null (Loc)); |
343d35dc | 4979 | end if; |
952af0b9 | 4980 | end if; |
4981 | ||
725a69d2 | 4982 | -- Initialize the table of ancestor tags. In case of interface types |
4983 | -- this table is not needed. | |
d62940bf | 4984 | |
cc60bd16 | 4985 | TSD_Tags_List := New_List; |
952af0b9 | 4986 | |
cc60bd16 | 4987 | -- If we are not statically allocating the dispatch table then we must |
4988 | -- fill position 0 with null because we still have not generated the | |
4989 | -- tag of Typ. | |
343d35dc | 4990 | |
cc60bd16 | 4991 | if not Building_Static_DT (Typ) |
4992 | or else Is_Interface (Typ) | |
4993 | then | |
4994 | Append_To (TSD_Tags_List, | |
4995 | Unchecked_Convert_To (RTE (RE_Tag), | |
4996 | New_Reference_To (RTE (RE_Null_Address), Loc))); | |
343d35dc | 4997 | |
cc60bd16 | 4998 | -- Otherwise we can safely reference the tag |
343d35dc | 4999 | |
cc60bd16 | 5000 | else |
5001 | Append_To (TSD_Tags_List, | |
5002 | New_Reference_To (DT_Ptr, Loc)); | |
5003 | end if; | |
343d35dc | 5004 | |
cc60bd16 | 5005 | -- Fill the rest of the table with the tags of the ancestors |
343d35dc | 5006 | |
cc60bd16 | 5007 | declare |
5008 | Current_Typ : Entity_Id; | |
5009 | Parent_Typ : Entity_Id; | |
5010 | Pos : Nat; | |
725a69d2 | 5011 | |
cc60bd16 | 5012 | begin |
17e14451 | 5013 | Pos := 1; |
5014 | Current_Typ := Typ; | |
725a69d2 | 5015 | |
17e14451 | 5016 | loop |
5017 | Parent_Typ := Etype (Current_Typ); | |
343d35dc | 5018 | |
17e14451 | 5019 | if Is_Private_Type (Parent_Typ) then |
5020 | Parent_Typ := Full_View (Base_Type (Parent_Typ)); | |
5021 | end if; | |
5022 | ||
5023 | exit when Parent_Typ = Current_Typ; | |
5024 | ||
5025 | if Is_CPP_Class (Parent_Typ) | |
5026 | or else Is_Interface (Typ) | |
5027 | then | |
5028 | -- The tags defined in the C++ side will be inherited when | |
5029 | -- the object is constructed (Exp_Ch3.Build_Init_Procedure) | |
5030 | ||
5031 | Append_To (TSD_Tags_List, | |
5032 | Unchecked_Convert_To (RTE (RE_Tag), | |
5033 | New_Reference_To (RTE (RE_Null_Address), Loc))); | |
5034 | else | |
5035 | Append_To (TSD_Tags_List, | |
5036 | New_Reference_To | |
5037 | (Node (First_Elmt (Access_Disp_Table (Parent_Typ))), | |
5038 | Loc)); | |
5039 | end if; | |
5040 | ||
5041 | Pos := Pos + 1; | |
5042 | Current_Typ := Parent_Typ; | |
5043 | end loop; | |
5044 | ||
5045 | pragma Assert (Pos = I_Depth + 1); | |
5046 | end; | |
5047 | ||
5048 | Append_To (TSD_Aggr_List, | |
5049 | Make_Aggregate (Loc, | |
5050 | Expressions => TSD_Tags_List)); | |
343d35dc | 5051 | |
725a69d2 | 5052 | -- Build the TSD object |
343d35dc | 5053 | |
5054 | Append_To (Result, | |
5055 | Make_Object_Declaration (Loc, | |
5056 | Defining_Identifier => TSD, | |
5057 | Aliased_Present => True, | |
24971415 | 5058 | Constant_Present => Building_Static_DT (Typ), |
343d35dc | 5059 | Object_Definition => |
5060 | Make_Subtype_Indication (Loc, | |
5061 | Subtype_Mark => New_Reference_To ( | |
5062 | RTE (RE_Type_Specific_Data), Loc), | |
5063 | Constraint => | |
5064 | Make_Index_Or_Discriminant_Constraint (Loc, | |
5065 | Constraints => New_List ( | |
5066 | Make_Integer_Literal (Loc, I_Depth)))), | |
725a69d2 | 5067 | |
343d35dc | 5068 | Expression => Make_Aggregate (Loc, |
17e14451 | 5069 | Expressions => TSD_Aggr_List))); |
343d35dc | 5070 | |
24971415 | 5071 | Set_Is_True_Constant (TSD, Building_Static_DT (Typ)); |
5072 | ||
343d35dc | 5073 | Append_To (Result, |
5074 | Make_Attribute_Definition_Clause (Loc, | |
5075 | Name => New_Reference_To (TSD, Loc), | |
5076 | Chars => Name_Alignment, | |
5077 | Expression => | |
5078 | Make_Attribute_Reference (Loc, | |
5079 | Prefix => New_Reference_To (RTE (RE_Integer_Address), Loc), | |
5080 | Attribute_Name => Name_Alignment))); | |
5081 | ||
24971415 | 5082 | -- Initialize or declare the dispatch table object |
343d35dc | 5083 | |
24971415 | 5084 | if not Has_DT (Typ) then |
725a69d2 | 5085 | DT_Constr_List := New_List; |
5086 | DT_Aggr_List := New_List; | |
343d35dc | 5087 | |
725a69d2 | 5088 | -- Typeinfo |
952af0b9 | 5089 | |
725a69d2 | 5090 | New_Node := |
5091 | Make_Attribute_Reference (Loc, | |
5092 | Prefix => New_Reference_To (TSD, Loc), | |
5093 | Attribute_Name => Name_Address); | |
5094 | ||
5095 | Append_To (DT_Constr_List, New_Node); | |
5096 | Append_To (DT_Aggr_List, New_Copy (New_Node)); | |
5097 | Append_To (DT_Aggr_List, Make_Integer_Literal (Loc, 0)); | |
5098 | ||
5099 | -- In case of locally defined tagged types we have already declared | |
5100 | -- and uninitialized object for the dispatch table, which is now | |
24971415 | 5101 | -- initialized by means of the following assignment: |
5102 | ||
5103 | -- DT := (TSD'Address, 0); | |
725a69d2 | 5104 | |
24971415 | 5105 | if not Building_Static_DT (Typ) then |
725a69d2 | 5106 | Append_To (Result, |
5107 | Make_Assignment_Statement (Loc, | |
5108 | Name => New_Reference_To (DT, Loc), | |
5109 | Expression => Make_Aggregate (Loc, | |
5110 | Expressions => DT_Aggr_List))); | |
5111 | ||
24971415 | 5112 | -- In case of library level tagged types we declare and export now |
5113 | -- the constant object containing the dummy dispatch table. There | |
5114 | -- is no need to declare the tag here because it has been previously | |
5115 | -- declared by Make_Tags | |
5116 | ||
5117 | -- DT : aliased constant No_Dispatch_Table := | |
5118 | -- (NDT_TSD => TSD'Address; | |
5119 | -- NDT_Prims_Ptr => 0); | |
5120 | -- for DT'Alignment use Address'Alignment; | |
725a69d2 | 5121 | |
5122 | else | |
5123 | Append_To (Result, | |
5124 | Make_Object_Declaration (Loc, | |
5125 | Defining_Identifier => DT, | |
5126 | Aliased_Present => True, | |
17e14451 | 5127 | Constant_Present => True, |
725a69d2 | 5128 | Object_Definition => |
5129 | New_Reference_To (RTE (RE_No_Dispatch_Table_Wrapper), Loc), | |
5130 | Expression => Make_Aggregate (Loc, | |
5131 | Expressions => DT_Aggr_List))); | |
5132 | ||
9af28f61 | 5133 | -- Comment needed ??? |
5134 | ||
3dbca0d5 | 5135 | if Generate_SCIL then |
5136 | Insert_Before (Last (Result), | |
5137 | New_Scil_Node | |
5138 | (Nkind => Dispatch_Table_Object_Init, | |
5139 | Related_Node => Last (Result), | |
5140 | Entity => Typ)); | |
5141 | end if; | |
5142 | ||
17e14451 | 5143 | Append_To (Result, |
5144 | Make_Attribute_Definition_Clause (Loc, | |
5145 | Name => New_Reference_To (DT, Loc), | |
5146 | Chars => Name_Alignment, | |
5147 | Expression => | |
5148 | Make_Attribute_Reference (Loc, | |
5149 | Prefix => | |
5150 | New_Reference_To (RTE (RE_Integer_Address), Loc), | |
5151 | Attribute_Name => Name_Alignment))); | |
5152 | ||
24971415 | 5153 | Export_DT (Typ, DT); |
725a69d2 | 5154 | end if; |
5155 | ||
5156 | -- Common case: Typ has a dispatch table | |
5157 | ||
5158 | -- Generate: | |
5159 | ||
5160 | -- Predef_Prims : Address_Array (1 .. Default_Prim_Ops_Count) := | |
5161 | -- (predef-prim-op-1'address, | |
5162 | -- predef-prim-op-2'address, | |
5163 | -- ... | |
5164 | -- predef-prim-op-n'address); | |
5165 | -- for Predef_Prims'Alignment use Address'Alignment | |
5166 | ||
5167 | -- DT : Dispatch_Table (Nb_Prims) := | |
5168 | -- (Signature => <sig-value>, | |
5169 | -- Tag_Kind => <tag_kind-value>, | |
5170 | -- Predef_Prims => Predef_Prims'First'Address, | |
5171 | -- Offset_To_Top => 0, | |
5172 | -- TSD => TSD'Address; | |
5173 | -- Prims_Ptr => (prim-op-1'address, | |
5174 | -- prim-op-2'address, | |
5175 | -- ... | |
5176 | -- prim-op-n'address)); | |
17e14451 | 5177 | -- for DT'Alignment use Address'Alignment |
725a69d2 | 5178 | |
5179 | else | |
5180 | declare | |
5181 | Pos : Nat; | |
5182 | ||
5183 | begin | |
24971415 | 5184 | if not Building_Static_DT (Typ) then |
725a69d2 | 5185 | Nb_Predef_Prims := Max_Predef_Prims; |
5186 | ||
5187 | else | |
5188 | Prim_Elmt := First_Elmt (Primitive_Operations (Typ)); | |
5189 | while Present (Prim_Elmt) loop | |
5190 | Prim := Node (Prim_Elmt); | |
5191 | ||
5192 | if Is_Predefined_Dispatching_Operation (Prim) | |
5193 | and then not Is_Abstract_Subprogram (Prim) | |
5194 | then | |
5195 | Pos := UI_To_Int (DT_Position (Prim)); | |
5196 | ||
5197 | if Pos > Nb_Predef_Prims then | |
5198 | Nb_Predef_Prims := Pos; | |
5199 | end if; | |
5200 | end if; | |
5201 | ||
5202 | Next_Elmt (Prim_Elmt); | |
5203 | end loop; | |
5204 | end if; | |
5205 | ||
5206 | declare | |
5207 | Prim_Table : array | |
5208 | (Nat range 1 .. Nb_Predef_Prims) of Entity_Id; | |
cc60bd16 | 5209 | Decl : Node_Id; |
725a69d2 | 5210 | E : Entity_Id; |
5211 | ||
5212 | begin | |
5213 | Prim_Ops_Aggr_List := New_List; | |
5214 | ||
5215 | Prim_Table := (others => Empty); | |
17e14451 | 5216 | |
cdb1c38f | 5217 | if Building_Static_DT (Typ) then |
5218 | Prim_Elmt := First_Elmt (Primitive_Operations (Typ)); | |
5219 | while Present (Prim_Elmt) loop | |
5220 | Prim := Node (Prim_Elmt); | |
725a69d2 | 5221 | |
cdb1c38f | 5222 | if Is_Predefined_Dispatching_Operation (Prim) |
5223 | and then not Is_Abstract_Subprogram (Prim) | |
5224 | and then not Present (Prim_Table | |
5225 | (UI_To_Int (DT_Position (Prim)))) | |
5226 | then | |
5227 | E := Prim; | |
5228 | while Present (Alias (E)) loop | |
5229 | E := Alias (E); | |
5230 | end loop; | |
725a69d2 | 5231 | |
cdb1c38f | 5232 | pragma Assert (not Is_Abstract_Subprogram (E)); |
5233 | Prim_Table (UI_To_Int (DT_Position (Prim))) := E; | |
5234 | end if; | |
725a69d2 | 5235 | |
cdb1c38f | 5236 | Next_Elmt (Prim_Elmt); |
5237 | end loop; | |
5238 | end if; | |
725a69d2 | 5239 | |
5240 | for J in Prim_Table'Range loop | |
5241 | if Present (Prim_Table (J)) then | |
5242 | New_Node := | |
cc60bd16 | 5243 | Unchecked_Convert_To (RTE (RE_Prim_Ptr), |
acf97c11 | 5244 | Make_Attribute_Reference (Loc, |
5245 | Prefix => New_Reference_To (Prim_Table (J), Loc), | |
5246 | Attribute_Name => Name_Unrestricted_Access)); | |
725a69d2 | 5247 | else |
cc60bd16 | 5248 | New_Node := Make_Null (Loc); |
725a69d2 | 5249 | end if; |
5250 | ||
5251 | Append_To (Prim_Ops_Aggr_List, New_Node); | |
5252 | end loop; | |
343d35dc | 5253 | |
cc60bd16 | 5254 | New_Node := |
5255 | Make_Aggregate (Loc, | |
5256 | Expressions => Prim_Ops_Aggr_List); | |
5257 | ||
5258 | Decl := | |
5259 | Make_Subtype_Declaration (Loc, | |
5260 | Defining_Identifier => | |
5261 | Make_Defining_Identifier (Loc, | |
5262 | New_Internal_Name ('S')), | |
5263 | Subtype_Indication => | |
5264 | New_Reference_To (RTE (RE_Address_Array), Loc)); | |
5265 | ||
5266 | Append_To (Result, Decl); | |
5267 | ||
68f95949 | 5268 | Append_To (Result, |
5269 | Make_Object_Declaration (Loc, | |
725a69d2 | 5270 | Defining_Identifier => Predef_Prims, |
68f95949 | 5271 | Aliased_Present => True, |
24971415 | 5272 | Constant_Present => Building_Static_DT (Typ), |
cc60bd16 | 5273 | Object_Definition => New_Reference_To |
5274 | (Defining_Identifier (Decl), Loc), | |
5275 | Expression => New_Node)); | |
5276 | ||
5277 | -- Remember aggregates initializing dispatch tables | |
5278 | ||
5279 | Append_Elmt (New_Node, DT_Aggr); | |
725a69d2 | 5280 | |
5281 | Append_To (Result, | |
5282 | Make_Attribute_Definition_Clause (Loc, | |
5283 | Name => New_Reference_To (Predef_Prims, Loc), | |
5284 | Chars => Name_Alignment, | |
5285 | Expression => | |
5286 | Make_Attribute_Reference (Loc, | |
5287 | Prefix => | |
5288 | New_Reference_To (RTE (RE_Integer_Address), Loc), | |
5289 | Attribute_Name => Name_Alignment))); | |
5290 | end; | |
5291 | end; | |
5292 | ||
5293 | -- Stage 1: Initialize the discriminant and the record components | |
5294 | ||
5295 | DT_Constr_List := New_List; | |
5296 | DT_Aggr_List := New_List; | |
5297 | ||
5298 | -- Num_Prims. If the tagged type has no primitives we add a dummy | |
5299 | -- slot whose address will be the tag of this type. | |
5300 | ||
5301 | if Nb_Prim = 0 then | |
5302 | New_Node := Make_Integer_Literal (Loc, 1); | |
5303 | else | |
5304 | New_Node := Make_Integer_Literal (Loc, Nb_Prim); | |
5305 | end if; | |
5306 | ||
5307 | Append_To (DT_Constr_List, New_Node); | |
5308 | Append_To (DT_Aggr_List, New_Copy (New_Node)); | |
5309 | ||
5310 | -- Signature | |
5311 | ||
5312 | if RTE_Record_Component_Available (RE_Signature) then | |
5313 | Append_To (DT_Aggr_List, | |
5314 | New_Reference_To (RTE (RE_Primary_DT), Loc)); | |
5315 | end if; | |
5316 | ||
5317 | -- Tag_Kind | |
5318 | ||
5319 | if RTE_Record_Component_Available (RE_Tag_Kind) then | |
5320 | Append_To (DT_Aggr_List, Tagged_Kind (Typ)); | |
5321 | end if; | |
5322 | ||
5323 | -- Predef_Prims | |
5324 | ||
5325 | Append_To (DT_Aggr_List, | |
5326 | Make_Attribute_Reference (Loc, | |
5327 | Prefix => New_Reference_To (Predef_Prims, Loc), | |
5328 | Attribute_Name => Name_Address)); | |
5329 | ||
5330 | -- Offset_To_Top | |
5331 | ||
cc60bd16 | 5332 | Append_To (DT_Aggr_List, Make_Integer_Literal (Loc, 0)); |
725a69d2 | 5333 | |
5334 | -- Typeinfo | |
5335 | ||
5336 | Append_To (DT_Aggr_List, | |
5337 | Make_Attribute_Reference (Loc, | |
5338 | Prefix => New_Reference_To (TSD, Loc), | |
5339 | Attribute_Name => Name_Address)); | |
5340 | ||
5341 | -- Stage 2: Initialize the table of primitive operations | |
5342 | ||
5343 | Prim_Ops_Aggr_List := New_List; | |
5344 | ||
5345 | if Nb_Prim = 0 then | |
cc60bd16 | 5346 | Append_To (Prim_Ops_Aggr_List, Make_Null (Loc)); |
725a69d2 | 5347 | |
24971415 | 5348 | elsif not Building_Static_DT (Typ) then |
725a69d2 | 5349 | for J in 1 .. Nb_Prim loop |
cc60bd16 | 5350 | Append_To (Prim_Ops_Aggr_List, Make_Null (Loc)); |
725a69d2 | 5351 | end loop; |
5352 | ||
5353 | else | |
5354 | declare | |
5355 | Prim_Table : array (Nat range 1 .. Nb_Prim) of Entity_Id; | |
5356 | E : Entity_Id; | |
5357 | Prim : Entity_Id; | |
5358 | Prim_Elmt : Elmt_Id; | |
5359 | ||
5360 | begin | |
5361 | Prim_Table := (others => Empty); | |
cdb1c38f | 5362 | |
5363 | Prim_Elmt := First_Elmt (Primitive_Operations (Typ)); | |
725a69d2 | 5364 | while Present (Prim_Elmt) loop |
5365 | Prim := Node (Prim_Elmt); | |
5366 | ||
9429b6e9 | 5367 | -- Retrieve the ultimate alias of the primitive for proper |
5368 | -- handling of renamings and eliminated primitives. | |
5369 | ||
5370 | E := Ultimate_Alias (Prim); | |
5371 | ||
725a69d2 | 5372 | if Is_Imported (Prim) |
a652dd51 | 5373 | or else Present (Interface_Alias (Prim)) |
725a69d2 | 5374 | or else Is_Predefined_Dispatching_Operation (Prim) |
9429b6e9 | 5375 | or else Is_Eliminated (E) |
725a69d2 | 5376 | then |
5377 | null; | |
5378 | ||
5379 | else | |
725a69d2 | 5380 | if not Is_Predefined_Dispatching_Operation (E) |
5381 | and then not Is_Abstract_Subprogram (E) | |
a652dd51 | 5382 | and then not Present (Interface_Alias (E)) |
725a69d2 | 5383 | then |
5384 | pragma Assert | |
5385 | (UI_To_Int (DT_Position (Prim)) <= Nb_Prim); | |
5386 | ||
5387 | Prim_Table (UI_To_Int (DT_Position (Prim))) := E; | |
725a69d2 | 5388 | end if; |
5389 | end if; | |
5390 | ||
5391 | Next_Elmt (Prim_Elmt); | |
5392 | end loop; | |
5393 | ||
5394 | for J in Prim_Table'Range loop | |
5395 | if Present (Prim_Table (J)) then | |
5396 | New_Node := | |
cc60bd16 | 5397 | Unchecked_Convert_To (RTE (RE_Prim_Ptr), |
acf97c11 | 5398 | Make_Attribute_Reference (Loc, |
5399 | Prefix => New_Reference_To (Prim_Table (J), Loc), | |
5400 | Attribute_Name => Name_Unrestricted_Access)); | |
725a69d2 | 5401 | else |
cc60bd16 | 5402 | New_Node := Make_Null (Loc); |
725a69d2 | 5403 | end if; |
5404 | ||
5405 | Append_To (Prim_Ops_Aggr_List, New_Node); | |
5406 | end loop; | |
5407 | end; | |
5408 | end if; | |
5409 | ||
cc60bd16 | 5410 | New_Node := |
725a69d2 | 5411 | Make_Aggregate (Loc, |
cc60bd16 | 5412 | Expressions => Prim_Ops_Aggr_List); |
5413 | ||
5414 | Append_To (DT_Aggr_List, New_Node); | |
5415 | ||
5416 | -- Remember aggregates initializing dispatch tables | |
5417 | ||
5418 | Append_Elmt (New_Node, DT_Aggr); | |
725a69d2 | 5419 | |
5420 | -- In case of locally defined tagged types we have already declared | |
5421 | -- and uninitialized object for the dispatch table, which is now | |
5422 | -- initialized by means of an assignment. | |
5423 | ||
24971415 | 5424 | if not Building_Static_DT (Typ) then |
725a69d2 | 5425 | Append_To (Result, |
5426 | Make_Assignment_Statement (Loc, | |
5427 | Name => New_Reference_To (DT, Loc), | |
5428 | Expression => Make_Aggregate (Loc, | |
5429 | Expressions => DT_Aggr_List))); | |
5430 | ||
24971415 | 5431 | -- In case of library level tagged types we declare now and export |
5432 | -- the constant object containing the dispatch table. | |
725a69d2 | 5433 | |
5434 | else | |
5435 | Append_To (Result, | |
5436 | Make_Object_Declaration (Loc, | |
5437 | Defining_Identifier => DT, | |
5438 | Aliased_Present => True, | |
17e14451 | 5439 | Constant_Present => True, |
725a69d2 | 5440 | Object_Definition => |
5441 | Make_Subtype_Indication (Loc, | |
5442 | Subtype_Mark => New_Reference_To | |
5443 | (RTE (RE_Dispatch_Table_Wrapper), Loc), | |
5444 | Constraint => Make_Index_Or_Discriminant_Constraint (Loc, | |
5445 | Constraints => DT_Constr_List)), | |
5446 | Expression => Make_Aggregate (Loc, | |
5447 | Expressions => DT_Aggr_List))); | |
5448 | ||
9af28f61 | 5449 | -- Comment needed ??? |
5450 | ||
3dbca0d5 | 5451 | if Generate_SCIL then |
5452 | Insert_Before (Last (Result), | |
5453 | New_Scil_Node | |
5454 | (Nkind => Dispatch_Table_Object_Init, | |
5455 | Related_Node => Last (Result), | |
5456 | Entity => Typ)); | |
5457 | end if; | |
5458 | ||
725a69d2 | 5459 | Append_To (Result, |
5460 | Make_Attribute_Definition_Clause (Loc, | |
5461 | Name => New_Reference_To (DT, Loc), | |
5462 | Chars => Name_Alignment, | |
5463 | Expression => | |
5464 | Make_Attribute_Reference (Loc, | |
5465 | Prefix => | |
5466 | New_Reference_To (RTE (RE_Integer_Address), Loc), | |
5467 | Attribute_Name => Name_Alignment))); | |
5468 | ||
24971415 | 5469 | Export_DT (Typ, DT); |
952af0b9 | 5470 | end if; |
76a1c25b | 5471 | end if; |
d62940bf | 5472 | |
f301a57b | 5473 | -- Initialize the table of ancestor tags if not building static |
5474 | -- dispatch table | |
725a69d2 | 5475 | |
24971415 | 5476 | if not Building_Static_DT (Typ) |
17e14451 | 5477 | and then not Is_Interface (Typ) |
725a69d2 | 5478 | and then not Is_CPP_Class (Typ) |
5479 | then | |
5480 | Append_To (Result, | |
5481 | Make_Assignment_Statement (Loc, | |
5482 | Name => | |
5483 | Make_Indexed_Component (Loc, | |
5484 | Prefix => | |
5485 | Make_Selected_Component (Loc, | |
5486 | Prefix => | |
5487 | New_Reference_To (TSD, Loc), | |
5488 | Selector_Name => | |
5489 | New_Reference_To | |
5490 | (RTE_Record_Component (RE_Tags_Table), Loc)), | |
5491 | Expressions => | |
5492 | New_List (Make_Integer_Literal (Loc, 0))), | |
5493 | ||
5494 | Expression => | |
5495 | New_Reference_To | |
5496 | (Node (First_Elmt (Access_Disp_Table (Typ))), Loc))); | |
5497 | end if; | |
5498 | ||
f301a57b | 5499 | -- Inherit the dispatch tables of the parent. There is no need to |
5500 | -- inherit anything from the parent when building static dispatch tables | |
5501 | -- because the whole dispatch table (including inherited primitives) has | |
5502 | -- been already built. | |
acf97c11 | 5503 | |
24971415 | 5504 | if Building_Static_DT (Typ) then |
725a69d2 | 5505 | null; |
5506 | ||
af647dc7 | 5507 | -- If the ancestor is a CPP_Class type we inherit the dispatch tables |
5508 | -- in the init proc, and we don't need to fill them in here. | |
d62940bf | 5509 | |
cc60bd16 | 5510 | elsif Is_CPP_Class (Parent_Typ) then |
af647dc7 | 5511 | null; |
d62940bf | 5512 | |
acf97c11 | 5513 | -- Otherwise we fill in the dispatch tables here |
d62940bf | 5514 | |
af647dc7 | 5515 | else |
cc60bd16 | 5516 | if Typ /= Parent_Typ |
af647dc7 | 5517 | and then not Is_Interface (Typ) |
5518 | and then not Restriction_Active (No_Dispatching_Calls) | |
68f95949 | 5519 | then |
343d35dc | 5520 | -- Inherit the dispatch table |
d62940bf | 5521 | |
acf97c11 | 5522 | if not Is_Interface (Typ) |
cc60bd16 | 5523 | and then not Is_Interface (Parent_Typ) |
5524 | and then not Is_CPP_Class (Parent_Typ) | |
acf97c11 | 5525 | then |
5526 | declare | |
5527 | Nb_Prims : constant Int := | |
5528 | UI_To_Int (DT_Entry_Count | |
cc60bd16 | 5529 | (First_Tag_Component (Parent_Typ))); |
5530 | ||
acf97c11 | 5531 | begin |
5532 | Append_To (Elab_Code, | |
5533 | Build_Inherit_Predefined_Prims (Loc, | |
5534 | Old_Tag_Node => | |
5535 | New_Reference_To | |
5536 | (Node | |
5537 | (Next_Elmt | |
5538 | (First_Elmt | |
cc60bd16 | 5539 | (Access_Disp_Table (Parent_Typ)))), Loc), |
acf97c11 | 5540 | New_Tag_Node => |
5541 | New_Reference_To | |
5542 | (Node | |
5543 | (Next_Elmt | |
5544 | (First_Elmt | |
5545 | (Access_Disp_Table (Typ)))), Loc))); | |
5546 | ||
5547 | if Nb_Prims /= 0 then | |
725a69d2 | 5548 | Append_To (Elab_Code, |
acf97c11 | 5549 | Build_Inherit_Prims (Loc, |
5550 | Typ => Typ, | |
5551 | Old_Tag_Node => | |
5552 | New_Reference_To | |
5553 | (Node | |
5554 | (First_Elmt | |
cc60bd16 | 5555 | (Access_Disp_Table (Parent_Typ))), Loc), |
acf97c11 | 5556 | New_Tag_Node => New_Reference_To (DT_Ptr, Loc), |
5557 | Num_Prims => Nb_Prims)); | |
5558 | end if; | |
5559 | end; | |
af647dc7 | 5560 | end if; |
d62940bf | 5561 | |
af647dc7 | 5562 | -- Inherit the secondary dispatch tables of the ancestor |
d62940bf | 5563 | |
cc60bd16 | 5564 | if not Is_CPP_Class (Parent_Typ) then |
af647dc7 | 5565 | declare |
5566 | Sec_DT_Ancestor : Elmt_Id := | |
5567 | Next_Elmt | |
acf97c11 | 5568 | (Next_Elmt |
af647dc7 | 5569 | (First_Elmt |
cc60bd16 | 5570 | (Access_Disp_Table (Parent_Typ)))); |
af647dc7 | 5571 | Sec_DT_Typ : Elmt_Id := |
5572 | Next_Elmt | |
acf97c11 | 5573 | (Next_Elmt |
5574 | (First_Elmt | |
5575 | (Access_Disp_Table (Typ)))); | |
af647dc7 | 5576 | |
5577 | procedure Copy_Secondary_DTs (Typ : Entity_Id); | |
5578 | -- Local procedure required to climb through the ancestors | |
5579 | -- and copy the contents of all their secondary dispatch | |
5580 | -- tables. | |
5581 | ||
5582 | ------------------------ | |
5583 | -- Copy_Secondary_DTs -- | |
5584 | ------------------------ | |
5585 | ||
5586 | procedure Copy_Secondary_DTs (Typ : Entity_Id) is | |
5587 | E : Entity_Id; | |
5588 | Iface : Elmt_Id; | |
5589 | ||
5590 | begin | |
5591 | -- Climb to the ancestor (if any) handling private types | |
5592 | ||
5593 | if Present (Full_View (Etype (Typ))) then | |
5594 | if Full_View (Etype (Typ)) /= Typ then | |
5595 | Copy_Secondary_DTs (Full_View (Etype (Typ))); | |
5596 | end if; | |
d62940bf | 5597 | |
af647dc7 | 5598 | elsif Etype (Typ) /= Typ then |
5599 | Copy_Secondary_DTs (Etype (Typ)); | |
5600 | end if; | |
d62940bf | 5601 | |
a652dd51 | 5602 | if Present (Interfaces (Typ)) |
5603 | and then not Is_Empty_Elmt_List (Interfaces (Typ)) | |
af647dc7 | 5604 | then |
a652dd51 | 5605 | Iface := First_Elmt (Interfaces (Typ)); |
af647dc7 | 5606 | E := First_Entity (Typ); |
5607 | while Present (E) | |
5608 | and then Present (Node (Sec_DT_Ancestor)) | |
725a69d2 | 5609 | and then Ekind (Node (Sec_DT_Ancestor)) = E_Constant |
af647dc7 | 5610 | loop |
5611 | if Is_Tag (E) and then Chars (E) /= Name_uTag then | |
cdb1c38f | 5612 | declare |
5613 | Num_Prims : constant Int := | |
5614 | UI_To_Int (DT_Entry_Count (E)); | |
5615 | ||
5616 | begin | |
5617 | if not Is_Interface (Etype (Typ)) then | |
5618 | ||
5619 | -- Inherit first secondary dispatch table | |
5620 | ||
5621 | Append_To (Elab_Code, | |
5622 | Build_Inherit_Predefined_Prims (Loc, | |
5623 | Old_Tag_Node => | |
5624 | Unchecked_Convert_To (RTE (RE_Tag), | |
acf97c11 | 5625 | New_Reference_To |
5626 | (Node | |
5627 | (Next_Elmt (Sec_DT_Ancestor)), | |
5628 | Loc)), | |
cdb1c38f | 5629 | New_Tag_Node => |
5630 | Unchecked_Convert_To (RTE (RE_Tag), | |
5631 | New_Reference_To | |
acf97c11 | 5632 | (Node (Next_Elmt (Sec_DT_Typ)), |
5633 | Loc)))); | |
cdb1c38f | 5634 | |
5635 | if Num_Prims /= 0 then | |
5636 | Append_To (Elab_Code, | |
5637 | Build_Inherit_Prims (Loc, | |
5638 | Typ => Node (Iface), | |
5639 | Old_Tag_Node => | |
5640 | Unchecked_Convert_To | |
5641 | (RTE (RE_Tag), | |
5642 | New_Reference_To | |
5643 | (Node (Sec_DT_Ancestor), | |
5644 | Loc)), | |
5645 | New_Tag_Node => | |
5646 | Unchecked_Convert_To | |
5647 | (RTE (RE_Tag), | |
5648 | New_Reference_To | |
5649 | (Node (Sec_DT_Typ), Loc)), | |
5650 | Num_Prims => Num_Prims)); | |
5651 | end if; | |
5652 | end if; | |
5653 | ||
5654 | Next_Elmt (Sec_DT_Ancestor); | |
5655 | Next_Elmt (Sec_DT_Typ); | |
343d35dc | 5656 | |
acf97c11 | 5657 | -- Skip the secondary dispatch table of |
5658 | -- predefined primitives | |
5659 | ||
5660 | Next_Elmt (Sec_DT_Ancestor); | |
5661 | Next_Elmt (Sec_DT_Typ); | |
5662 | ||
cdb1c38f | 5663 | if not Is_Interface (Etype (Typ)) then |
5664 | ||
5665 | -- Inherit second secondary dispatch table | |
343d35dc | 5666 | |
343d35dc | 5667 | Append_To (Elab_Code, |
5668 | Build_Inherit_Predefined_Prims (Loc, | |
5669 | Old_Tag_Node => | |
5670 | Unchecked_Convert_To (RTE (RE_Tag), | |
5671 | New_Reference_To | |
acf97c11 | 5672 | (Node |
5673 | (Next_Elmt (Sec_DT_Ancestor)), | |
5674 | Loc)), | |
343d35dc | 5675 | New_Tag_Node => |
5676 | Unchecked_Convert_To (RTE (RE_Tag), | |
5677 | New_Reference_To | |
acf97c11 | 5678 | (Node (Next_Elmt (Sec_DT_Typ)), |
5679 | Loc)))); | |
343d35dc | 5680 | |
5681 | if Num_Prims /= 0 then | |
5682 | Append_To (Elab_Code, | |
5683 | Build_Inherit_Prims (Loc, | |
17e14451 | 5684 | Typ => Node (Iface), |
343d35dc | 5685 | Old_Tag_Node => |
5686 | Unchecked_Convert_To | |
5687 | (RTE (RE_Tag), | |
5688 | New_Reference_To | |
5689 | (Node (Sec_DT_Ancestor), | |
5690 | Loc)), | |
5691 | New_Tag_Node => | |
5692 | Unchecked_Convert_To | |
5693 | (RTE (RE_Tag), | |
5694 | New_Reference_To | |
5695 | (Node (Sec_DT_Typ), Loc)), | |
17e14451 | 5696 | Num_Prims => Num_Prims)); |
343d35dc | 5697 | end if; |
cdb1c38f | 5698 | end if; |
5699 | end; | |
af647dc7 | 5700 | |
5701 | Next_Elmt (Sec_DT_Ancestor); | |
5702 | Next_Elmt (Sec_DT_Typ); | |
acf97c11 | 5703 | |
5704 | -- Skip the secondary dispatch table of | |
5705 | -- predefined primitives | |
5706 | ||
5707 | Next_Elmt (Sec_DT_Ancestor); | |
5708 | Next_Elmt (Sec_DT_Typ); | |
5709 | ||
af647dc7 | 5710 | Next_Elmt (Iface); |
5711 | end if; | |
d62940bf | 5712 | |
af647dc7 | 5713 | Next_Entity (E); |
5714 | end loop; | |
5715 | end if; | |
5716 | end Copy_Secondary_DTs; | |
d62940bf | 5717 | |
af647dc7 | 5718 | begin |
725a69d2 | 5719 | if Present (Node (Sec_DT_Ancestor)) |
5720 | and then Ekind (Node (Sec_DT_Ancestor)) = E_Constant | |
5721 | then | |
af647dc7 | 5722 | -- Handle private types |
76a1c25b | 5723 | |
af647dc7 | 5724 | if Present (Full_View (Typ)) then |
5725 | Copy_Secondary_DTs (Full_View (Typ)); | |
5726 | else | |
5727 | Copy_Secondary_DTs (Typ); | |
5728 | end if; | |
76a1c25b | 5729 | end if; |
af647dc7 | 5730 | end; |
5731 | end if; | |
76a1c25b | 5732 | end if; |
343d35dc | 5733 | end if; |
d62940bf | 5734 | |
343d35dc | 5735 | -- Generate code to register the Tag in the External_Tag hash table for |
5736 | -- the pure Ada type only. | |
d62940bf | 5737 | |
343d35dc | 5738 | -- Register_Tag (Dt_Ptr); |
d62940bf | 5739 | |
725a69d2 | 5740 | -- Skip this action in the following cases: |
5741 | -- 1) if Register_Tag is not available. | |
5742 | -- 2) in No_Run_Time mode. | |
2ea346ac | 5743 | -- 3) if Typ is not defined at the library level (this is required |
725a69d2 | 5744 | -- to avoid adding concurrency control to the hash table used |
5745 | -- by the run-time to register the tags). | |
d62940bf | 5746 | |
cdb1c38f | 5747 | if not No_Run_Time_Mode |
5748 | and then Is_Library_Level_Entity (Typ) | |
5749 | and then RTE_Available (RE_Register_Tag) | |
5750 | then | |
725a69d2 | 5751 | Append_To (Elab_Code, |
cdb1c38f | 5752 | Make_Procedure_Call_Statement (Loc, |
5753 | Name => New_Reference_To (RTE (RE_Register_Tag), Loc), | |
5754 | Parameter_Associations => | |
5755 | New_List (New_Reference_To (DT_Ptr, Loc)))); | |
d62940bf | 5756 | end if; |
5757 | ||
2ea346ac | 5758 | if not Is_Empty_List (Elab_Code) then |
5759 | Append_List_To (Result, Elab_Code); | |
5760 | end if; | |
cdb1c38f | 5761 | |
f38c8084 | 5762 | -- Populate the two auxiliary tables used for dispatching asynchronous, |
5763 | -- conditional and timed selects for synchronized types that implement | |
5764 | -- a limited interface. Skip this step in Ravenscar profile or when | |
5765 | -- general dispatching is forbidden. | |
17e14451 | 5766 | |
5767 | if Ada_Version >= Ada_05 | |
5768 | and then Is_Concurrent_Record_Type (Typ) | |
a652dd51 | 5769 | and then Has_Interfaces (Typ) |
f38c8084 | 5770 | and then not Restriction_Active (No_Dispatching_Calls) |
5771 | and then not Restriction_Active (No_Select_Statements) | |
17e14451 | 5772 | then |
5773 | Append_List_To (Result, | |
5774 | Make_Select_Specific_Data_Table (Typ)); | |
5775 | end if; | |
5776 | ||
cc60bd16 | 5777 | -- Remember entities containing dispatch tables |
acf97c11 | 5778 | |
cc60bd16 | 5779 | Append_Elmt (Predef_Prims, DT_Decl); |
5780 | Append_Elmt (DT, DT_Decl); | |
acf97c11 | 5781 | |
725a69d2 | 5782 | Analyze_List (Result, Suppress => All_Checks); |
17e14451 | 5783 | Set_Has_Dispatch_Table (Typ); |
5784 | ||
f301a57b | 5785 | -- Mark entities containing dispatch tables. Required by the backend to |
5786 | -- handle them properly. | |
cc60bd16 | 5787 | |
5788 | if not Is_Interface (Typ) then | |
5789 | declare | |
5790 | Elmt : Elmt_Id; | |
5791 | ||
5792 | begin | |
5793 | -- Ensure that entities Prim_Ptr and Predef_Prims_Table_Ptr have | |
5794 | -- the decoration required by the backend | |
5795 | ||
5796 | Set_Is_Dispatch_Table_Entity (RTE (RE_Prim_Ptr)); | |
5797 | Set_Is_Dispatch_Table_Entity (RTE (RE_Predef_Prims_Table_Ptr)); | |
5798 | ||
5799 | -- Object declarations | |
5800 | ||
5801 | Elmt := First_Elmt (DT_Decl); | |
5802 | while Present (Elmt) loop | |
5803 | Set_Is_Dispatch_Table_Entity (Node (Elmt)); | |
5804 | pragma Assert (Ekind (Etype (Node (Elmt))) = E_Array_Subtype | |
5805 | or else Ekind (Etype (Node (Elmt))) = E_Record_Subtype); | |
5806 | Set_Is_Dispatch_Table_Entity (Etype (Node (Elmt))); | |
5807 | Next_Elmt (Elmt); | |
5808 | end loop; | |
5809 | ||
5810 | -- Aggregates initializing dispatch tables | |
5811 | ||
5812 | Elmt := First_Elmt (DT_Aggr); | |
5813 | while Present (Elmt) loop | |
5814 | Set_Is_Dispatch_Table_Entity (Etype (Node (Elmt))); | |
5815 | Next_Elmt (Elmt); | |
5816 | end loop; | |
5817 | end; | |
5818 | end if; | |
5819 | ||
76a1c25b | 5820 | return Result; |
5821 | end Make_DT; | |
d62940bf | 5822 | |
76a1c25b | 5823 | ------------------------------------- |
5824 | -- Make_Select_Specific_Data_Table -- | |
5825 | ------------------------------------- | |
d62940bf | 5826 | |
76a1c25b | 5827 | function Make_Select_Specific_Data_Table |
5828 | (Typ : Entity_Id) return List_Id | |
5829 | is | |
5830 | Assignments : constant List_Id := New_List; | |
5831 | Loc : constant Source_Ptr := Sloc (Typ); | |
d62940bf | 5832 | |
68f95949 | 5833 | Conc_Typ : Entity_Id; |
5834 | Decls : List_Id; | |
5835 | DT_Ptr : Entity_Id; | |
5836 | Prim : Entity_Id; | |
5837 | Prim_Als : Entity_Id; | |
5838 | Prim_Elmt : Elmt_Id; | |
5839 | Prim_Pos : Uint; | |
343d35dc | 5840 | Nb_Prim : Nat := 0; |
d62940bf | 5841 | |
76a1c25b | 5842 | type Examined_Array is array (Int range <>) of Boolean; |
d62940bf | 5843 | |
76a1c25b | 5844 | function Find_Entry_Index (E : Entity_Id) return Uint; |
5845 | -- Given an entry, find its index in the visible declarations of the | |
5846 | -- corresponding concurrent type of Typ. | |
d62940bf | 5847 | |
76a1c25b | 5848 | ---------------------- |
5849 | -- Find_Entry_Index -- | |
5850 | ---------------------- | |
d62940bf | 5851 | |
76a1c25b | 5852 | function Find_Entry_Index (E : Entity_Id) return Uint is |
5853 | Index : Uint := Uint_1; | |
5854 | Subp_Decl : Entity_Id; | |
d62940bf | 5855 | |
76a1c25b | 5856 | begin |
5857 | if Present (Decls) | |
5858 | and then not Is_Empty_List (Decls) | |
5859 | then | |
5860 | Subp_Decl := First (Decls); | |
5861 | while Present (Subp_Decl) loop | |
5862 | if Nkind (Subp_Decl) = N_Entry_Declaration then | |
5863 | if Defining_Identifier (Subp_Decl) = E then | |
5864 | return Index; | |
5865 | end if; | |
d62940bf | 5866 | |
76a1c25b | 5867 | Index := Index + 1; |
5868 | end if; | |
d62940bf | 5869 | |
76a1c25b | 5870 | Next (Subp_Decl); |
5871 | end loop; | |
5872 | end if; | |
d62940bf | 5873 | |
76a1c25b | 5874 | return Uint_0; |
5875 | end Find_Entry_Index; | |
5876 | ||
5877 | -- Start of processing for Make_Select_Specific_Data_Table | |
5878 | ||
5879 | begin | |
68f95949 | 5880 | pragma Assert (not Restriction_Active (No_Dispatching_Calls)); |
5881 | ||
76a1c25b | 5882 | DT_Ptr := Node (First_Elmt (Access_Disp_Table (Typ))); |
d62940bf | 5883 | |
76a1c25b | 5884 | if Present (Corresponding_Concurrent_Type (Typ)) then |
5885 | Conc_Typ := Corresponding_Concurrent_Type (Typ); | |
5886 | ||
17e14451 | 5887 | if Present (Full_View (Conc_Typ)) then |
5888 | Conc_Typ := Full_View (Conc_Typ); | |
5889 | end if; | |
5890 | ||
76a1c25b | 5891 | if Ekind (Conc_Typ) = E_Protected_Type then |
5892 | Decls := Visible_Declarations (Protected_Definition ( | |
5893 | Parent (Conc_Typ))); | |
d62940bf | 5894 | else |
5895 | pragma Assert (Ekind (Conc_Typ) = E_Task_Type); | |
76a1c25b | 5896 | Decls := Visible_Declarations (Task_Definition ( |
5897 | Parent (Conc_Typ))); | |
5898 | end if; | |
5899 | end if; | |
d62940bf | 5900 | |
76a1c25b | 5901 | -- Count the non-predefined primitive operations |
d62940bf | 5902 | |
76a1c25b | 5903 | Prim_Elmt := First_Elmt (Primitive_Operations (Typ)); |
5904 | while Present (Prim_Elmt) loop | |
af647dc7 | 5905 | Prim := Node (Prim_Elmt); |
5906 | ||
5907 | if not (Is_Predefined_Dispatching_Operation (Prim) | |
5908 | or else Is_Predefined_Dispatching_Alias (Prim)) | |
5909 | then | |
76a1c25b | 5910 | Nb_Prim := Nb_Prim + 1; |
5911 | end if; | |
d62940bf | 5912 | |
76a1c25b | 5913 | Next_Elmt (Prim_Elmt); |
5914 | end loop; | |
d62940bf | 5915 | |
76a1c25b | 5916 | declare |
68f95949 | 5917 | Examined : Examined_Array (1 .. Nb_Prim) := (others => False); |
d62940bf | 5918 | |
76a1c25b | 5919 | begin |
5920 | Prim_Elmt := First_Elmt (Primitive_Operations (Typ)); | |
5921 | while Present (Prim_Elmt) loop | |
5922 | Prim := Node (Prim_Elmt); | |
d62940bf | 5923 | |
af647dc7 | 5924 | -- Look for primitive overriding an abstract interface subprogram |
d62940bf | 5925 | |
a652dd51 | 5926 | if Present (Interface_Alias (Prim)) |
af647dc7 | 5927 | and then not Examined (UI_To_Int (DT_Position (Alias (Prim)))) |
5928 | then | |
5929 | Prim_Pos := DT_Position (Alias (Prim)); | |
5930 | pragma Assert (UI_To_Int (Prim_Pos) <= Nb_Prim); | |
5931 | Examined (UI_To_Int (Prim_Pos)) := True; | |
d62940bf | 5932 | |
af647dc7 | 5933 | -- Set the primitive operation kind regardless of subprogram |
5934 | -- type. Generate: | |
5935 | -- Ada.Tags.Set_Prim_Op_Kind (DT_Ptr, <position>, <kind>); | |
d62940bf | 5936 | |
af647dc7 | 5937 | Append_To (Assignments, |
725a69d2 | 5938 | Make_Procedure_Call_Statement (Loc, |
5939 | Name => New_Reference_To (RTE (RE_Set_Prim_Op_Kind), Loc), | |
5940 | Parameter_Associations => New_List ( | |
5941 | New_Reference_To (DT_Ptr, Loc), | |
5942 | Make_Integer_Literal (Loc, Prim_Pos), | |
5943 | Prim_Op_Kind (Alias (Prim), Typ)))); | |
68f95949 | 5944 | |
af647dc7 | 5945 | -- Retrieve the root of the alias chain |
68f95949 | 5946 | |
af647dc7 | 5947 | Prim_Als := Prim; |
5948 | while Present (Alias (Prim_Als)) loop | |
5949 | Prim_Als := Alias (Prim_Als); | |
5950 | end loop; | |
68f95949 | 5951 | |
af647dc7 | 5952 | -- In the case of an entry wrapper, set the entry index |
68f95949 | 5953 | |
af647dc7 | 5954 | if Ekind (Prim) = E_Procedure |
5955 | and then Is_Primitive_Wrapper (Prim_Als) | |
5956 | and then Ekind (Wrapped_Entity (Prim_Als)) = E_Entry | |
5957 | then | |
5958 | -- Generate: | |
5959 | -- Ada.Tags.Set_Entry_Index | |
5960 | -- (DT_Ptr, <position>, <index>); | |
68f95949 | 5961 | |
af647dc7 | 5962 | Append_To (Assignments, |
725a69d2 | 5963 | Make_Procedure_Call_Statement (Loc, |
5964 | Name => | |
5965 | New_Reference_To (RTE (RE_Set_Entry_Index), Loc), | |
5966 | Parameter_Associations => New_List ( | |
5967 | New_Reference_To (DT_Ptr, Loc), | |
5968 | Make_Integer_Literal (Loc, Prim_Pos), | |
5969 | Make_Integer_Literal (Loc, | |
5970 | Find_Entry_Index (Wrapped_Entity (Prim_Als)))))); | |
76a1c25b | 5971 | end if; |
5972 | end if; | |
5973 | ||
76a1c25b | 5974 | Next_Elmt (Prim_Elmt); |
5975 | end loop; | |
5976 | end; | |
5977 | ||
5978 | return Assignments; | |
5979 | end Make_Select_Specific_Data_Table; | |
d62940bf | 5980 | |
17e14451 | 5981 | --------------- |
5982 | -- Make_Tags -- | |
5983 | --------------- | |
5984 | ||
5985 | function Make_Tags (Typ : Entity_Id) return List_Id is | |
f301a57b | 5986 | Loc : constant Source_Ptr := Sloc (Typ); |
5987 | Result : constant List_Id := New_List; | |
5988 | ||
5989 | procedure Import_DT | |
5990 | (Tag_Typ : Entity_Id; | |
5991 | DT : Entity_Id; | |
5992 | Is_Secondary_DT : Boolean); | |
5993 | -- Import the dispatch table DT of tagged type Tag_Typ. Required to | |
5994 | -- generate forward references and statically allocate the table. For | |
5995 | -- primary dispatch tables that require no dispatch table generate: | |
5996 | -- DT : static aliased constant Non_Dispatch_Table_Wrapper; | |
5997 | -- $pragma import (ada, DT); | |
5998 | -- Otherwise generate: | |
5999 | -- DT : static aliased constant Dispatch_Table_Wrapper (Nb_Prim); | |
6000 | -- $pragma import (ada, DT); | |
7854e190 | 6001 | |
f301a57b | 6002 | --------------- |
6003 | -- Import_DT -- | |
6004 | --------------- | |
24971415 | 6005 | |
f301a57b | 6006 | procedure Import_DT |
6007 | (Tag_Typ : Entity_Id; | |
6008 | DT : Entity_Id; | |
6009 | Is_Secondary_DT : Boolean) | |
6010 | is | |
6011 | DT_Constr_List : List_Id; | |
6012 | Nb_Prim : Nat; | |
24971415 | 6013 | |
f301a57b | 6014 | begin |
6015 | Set_Is_Imported (DT); | |
6016 | Set_Ekind (DT, E_Constant); | |
6017 | Set_Related_Type (DT, Typ); | |
24971415 | 6018 | |
24971415 | 6019 | -- The scope must be set now to call Get_External_Name |
6020 | ||
6021 | Set_Scope (DT, Current_Scope); | |
6022 | ||
6023 | Get_External_Name (DT, True); | |
6024 | Set_Interface_Name (DT, | |
17e14451 | 6025 | Make_String_Literal (Loc, |
6026 | Strval => String_From_Name_Buffer)); | |
6027 | ||
24971415 | 6028 | -- Ensure proper Sprint output of this implicit importation |
17e14451 | 6029 | |
24971415 | 6030 | Set_Is_Internal (DT); |
17e14451 | 6031 | |
24971415 | 6032 | -- Save this entity to allow Make_DT to generate its exportation |
6033 | ||
f301a57b | 6034 | Append_Elmt (DT, Dispatch_Table_Wrappers (Typ)); |
24971415 | 6035 | |
f301a57b | 6036 | -- No dispatch table required |
acf97c11 | 6037 | |
f301a57b | 6038 | if not Is_Secondary_DT |
6039 | and then not Has_DT (Tag_Typ) | |
6040 | then | |
6041 | Append_To (Result, | |
6042 | Make_Object_Declaration (Loc, | |
6043 | Defining_Identifier => DT, | |
6044 | Aliased_Present => True, | |
6045 | Constant_Present => True, | |
6046 | Object_Definition => | |
6047 | New_Reference_To (RTE (RE_No_Dispatch_Table_Wrapper), Loc))); | |
6048 | ||
6049 | else | |
24971415 | 6050 | -- Calculate the number of primitives of the dispatch table and |
6051 | -- the size of the Type_Specific_Data record. | |
6052 | ||
f301a57b | 6053 | Nb_Prim := |
6054 | UI_To_Int (DT_Entry_Count (First_Tag_Component (Tag_Typ))); | |
24971415 | 6055 | |
6056 | -- If the tagged type has no primitives we add a dummy slot | |
6057 | -- whose address will be the tag of this type. | |
6058 | ||
6059 | if Nb_Prim = 0 then | |
6060 | DT_Constr_List := | |
6061 | New_List (Make_Integer_Literal (Loc, 1)); | |
6062 | else | |
6063 | DT_Constr_List := | |
6064 | New_List (Make_Integer_Literal (Loc, Nb_Prim)); | |
6065 | end if; | |
6066 | ||
6067 | Append_To (Result, | |
6068 | Make_Object_Declaration (Loc, | |
6069 | Defining_Identifier => DT, | |
6070 | Aliased_Present => True, | |
6071 | Constant_Present => True, | |
6072 | Object_Definition => | |
6073 | Make_Subtype_Indication (Loc, | |
6074 | Subtype_Mark => | |
6075 | New_Reference_To (RTE (RE_Dispatch_Table_Wrapper), Loc), | |
6076 | Constraint => Make_Index_Or_Discriminant_Constraint (Loc, | |
6077 | Constraints => DT_Constr_List)))); | |
f301a57b | 6078 | end if; |
6079 | end Import_DT; | |
6080 | ||
6081 | -- Local variables | |
6082 | ||
6083 | Tname : constant Name_Id := Chars (Typ); | |
6084 | AI_Tag_Comp : Elmt_Id; | |
6085 | DT : Node_Id; | |
6086 | DT_Ptr : Node_Id; | |
6087 | Predef_Prims_Ptr : Node_Id; | |
6088 | Iface_DT : Node_Id; | |
6089 | Iface_DT_Ptr : Node_Id; | |
6090 | Suffix_Index : Int; | |
6091 | Typ_Name : Name_Id; | |
6092 | Typ_Comps : Elist_Id; | |
6093 | ||
6094 | -- Start of processing for Make_Tags | |
6095 | ||
6096 | begin | |
6097 | -- 1) Generate the primary and secondary tag entities | |
24971415 | 6098 | |
f301a57b | 6099 | -- Collect the components associated with secondary dispatch tables |
6100 | ||
6101 | if Has_Interfaces (Typ) then | |
6102 | Collect_Interface_Components (Typ, Typ_Comps); | |
6103 | end if; | |
6104 | ||
6105 | -- 1) Generate the primary tag entities | |
6106 | ||
6107 | -- Primary dispatch table containing user-defined primitives | |
6108 | ||
6109 | DT_Ptr := Make_Defining_Identifier (Loc, | |
6110 | New_External_Name (Tname, 'P')); | |
6111 | Set_Etype (DT_Ptr, RTE (RE_Tag)); | |
6112 | ||
6113 | -- Primary dispatch table containing predefined primitives | |
6114 | ||
6115 | Predef_Prims_Ptr := | |
6116 | Make_Defining_Identifier (Loc, | |
6117 | Chars => New_External_Name (Tname, 'Y')); | |
6118 | Set_Etype (Predef_Prims_Ptr, RTE (RE_Address)); | |
6119 | ||
6120 | -- Import the forward declaration of the Dispatch Table wrapper record | |
6121 | -- (Make_DT will take care of its exportation) | |
6122 | ||
6123 | if Building_Static_DT (Typ) then | |
6124 | Set_Dispatch_Table_Wrappers (Typ, New_Elmt_List); | |
6125 | ||
6126 | DT := | |
6127 | Make_Defining_Identifier (Loc, | |
6128 | Chars => New_External_Name (Tname, 'T')); | |
6129 | ||
6130 | Import_DT (Typ, DT, Is_Secondary_DT => False); | |
6131 | ||
6132 | if Has_DT (Typ) then | |
24971415 | 6133 | Append_To (Result, |
6134 | Make_Object_Declaration (Loc, | |
6135 | Defining_Identifier => DT_Ptr, | |
6136 | Constant_Present => True, | |
6137 | Object_Definition => New_Reference_To (RTE (RE_Tag), Loc), | |
6138 | Expression => | |
6139 | Unchecked_Convert_To (RTE (RE_Tag), | |
6140 | Make_Attribute_Reference (Loc, | |
6141 | Prefix => | |
6142 | Make_Selected_Component (Loc, | |
6143 | Prefix => New_Reference_To (DT, Loc), | |
6144 | Selector_Name => | |
6145 | New_Occurrence_Of | |
6146 | (RTE_Record_Component (RE_Prims_Ptr), Loc)), | |
6147 | Attribute_Name => Name_Address)))); | |
6148 | ||
9af28f61 | 6149 | -- Comment needed ??? |
6150 | ||
3dbca0d5 | 6151 | if Generate_SCIL then |
6152 | Insert_Before (Last (Result), | |
6153 | New_Scil_Node | |
6154 | (Nkind => Dispatch_Table_Tag_Init, | |
6155 | Related_Node => Last (Result), | |
6156 | Entity => Typ)); | |
6157 | end if; | |
6158 | ||
acf97c11 | 6159 | Append_To (Result, |
6160 | Make_Object_Declaration (Loc, | |
6161 | Defining_Identifier => Predef_Prims_Ptr, | |
6162 | Constant_Present => True, | |
6163 | Object_Definition => New_Reference_To | |
6164 | (RTE (RE_Address), Loc), | |
6165 | Expression => | |
6166 | Make_Attribute_Reference (Loc, | |
6167 | Prefix => | |
6168 | Make_Selected_Component (Loc, | |
6169 | Prefix => New_Reference_To (DT, Loc), | |
6170 | Selector_Name => | |
6171 | New_Occurrence_Of | |
6172 | (RTE_Record_Component (RE_Predef_Prims), Loc)), | |
6173 | Attribute_Name => Name_Address))); | |
6174 | ||
24971415 | 6175 | -- No dispatch table required |
6176 | ||
6177 | else | |
24971415 | 6178 | Append_To (Result, |
6179 | Make_Object_Declaration (Loc, | |
6180 | Defining_Identifier => DT_Ptr, | |
6181 | Constant_Present => True, | |
6182 | Object_Definition => New_Reference_To (RTE (RE_Tag), Loc), | |
6183 | Expression => | |
6184 | Unchecked_Convert_To (RTE (RE_Tag), | |
6185 | Make_Attribute_Reference (Loc, | |
6186 | Prefix => | |
6187 | Make_Selected_Component (Loc, | |
6188 | Prefix => New_Reference_To (DT, Loc), | |
6189 | Selector_Name => | |
6190 | New_Occurrence_Of | |
6191 | (RTE_Record_Component (RE_NDT_Prims_Ptr), Loc)), | |
6192 | Attribute_Name => Name_Address)))); | |
3dbca0d5 | 6193 | |
9af28f61 | 6194 | -- Comment needed ??? |
6195 | ||
3dbca0d5 | 6196 | if Generate_SCIL then |
6197 | Insert_Before (Last (Result), | |
6198 | New_Scil_Node | |
6199 | (Nkind => Dispatch_Table_Tag_Init, | |
6200 | Related_Node => Last (Result), | |
6201 | Entity => Typ)); | |
6202 | end if; | |
24971415 | 6203 | end if; |
6204 | ||
6205 | Set_Is_True_Constant (DT_Ptr); | |
e7e688dd | 6206 | Set_Is_Statically_Allocated (DT_Ptr); |
17e14451 | 6207 | end if; |
6208 | ||
6209 | pragma Assert (No (Access_Disp_Table (Typ))); | |
6210 | Set_Access_Disp_Table (Typ, New_Elmt_List); | |
6211 | Append_Elmt (DT_Ptr, Access_Disp_Table (Typ)); | |
acf97c11 | 6212 | Append_Elmt (Predef_Prims_Ptr, Access_Disp_Table (Typ)); |
17e14451 | 6213 | |
6214 | -- 2) Generate the secondary tag entities | |
6215 | ||
a652dd51 | 6216 | if Has_Interfaces (Typ) then |
f301a57b | 6217 | |
6218 | -- Note: The following value of Suffix_Index must be in sync with | |
6219 | -- the Suffix_Index values of secondary dispatch tables generated | |
6220 | -- by Make_DT. | |
6221 | ||
6222 | Suffix_Index := 1; | |
17e14451 | 6223 | |
6224 | -- For each interface type we build an unique external name | |
6225 | -- associated with its corresponding secondary dispatch table. | |
6226 | -- This external name will be used to declare an object that | |
6227 | -- references this secondary dispatch table, value that will be | |
6228 | -- used for the elaboration of Typ's objects and also for the | |
6229 | -- elaboration of objects of derivations of Typ that do not | |
6230 | -- override the primitive operation of this interface type. | |
6231 | ||
6232 | AI_Tag_Comp := First_Elmt (Typ_Comps); | |
6233 | while Present (AI_Tag_Comp) loop | |
6234 | Get_Secondary_DT_External_Name | |
cdb1c38f | 6235 | (Typ, Related_Type (Node (AI_Tag_Comp)), Suffix_Index); |
cdb1c38f | 6236 | Typ_Name := Name_Find; |
17e14451 | 6237 | |
f301a57b | 6238 | if Building_Static_DT (Typ) then |
6239 | Iface_DT := | |
6240 | Make_Defining_Identifier (Loc, | |
6241 | Chars => New_External_Name | |
6242 | (Typ_Name, 'T', Suffix_Index => -1)); | |
6243 | Import_DT | |
6244 | (Tag_Typ => Related_Type (Node (AI_Tag_Comp)), | |
6245 | DT => Iface_DT, | |
6246 | Is_Secondary_DT => True); | |
6247 | end if; | |
6248 | ||
acf97c11 | 6249 | -- Secondary dispatch table referencing thunks to user-defined |
6250 | -- primitives covered by this interface. | |
6251 | ||
17e14451 | 6252 | Iface_DT_Ptr := |
6253 | Make_Defining_Identifier (Loc, | |
6254 | Chars => New_External_Name (Typ_Name, 'P')); | |
6255 | Set_Etype (Iface_DT_Ptr, RTE (RE_Interface_Tag)); | |
6256 | Set_Ekind (Iface_DT_Ptr, E_Constant); | |
cdb1c38f | 6257 | Set_Is_Tag (Iface_DT_Ptr); |
6258 | Set_Has_Thunks (Iface_DT_Ptr); | |
2ea346ac | 6259 | Set_Is_Statically_Allocated (Iface_DT_Ptr, |
6260 | Is_Library_Level_Tagged_Type (Typ)); | |
17e14451 | 6261 | Set_Is_True_Constant (Iface_DT_Ptr); |
cdb1c38f | 6262 | Set_Related_Type |
6263 | (Iface_DT_Ptr, Related_Type (Node (AI_Tag_Comp))); | |
6264 | Append_Elmt (Iface_DT_Ptr, Access_Disp_Table (Typ)); | |
6265 | ||
f301a57b | 6266 | if Building_Static_DT (Typ) then |
6267 | Append_To (Result, | |
6268 | Make_Object_Declaration (Loc, | |
6269 | Defining_Identifier => Iface_DT_Ptr, | |
6270 | Constant_Present => True, | |
6271 | Object_Definition => New_Reference_To | |
6272 | (RTE (RE_Interface_Tag), Loc), | |
6273 | Expression => | |
6274 | Unchecked_Convert_To (RTE (RE_Interface_Tag), | |
6275 | Make_Attribute_Reference (Loc, | |
6276 | Prefix => | |
6277 | Make_Selected_Component (Loc, | |
6278 | Prefix => New_Reference_To (Iface_DT, Loc), | |
6279 | Selector_Name => | |
6280 | New_Occurrence_Of | |
6281 | (RTE_Record_Component (RE_Prims_Ptr), Loc)), | |
6282 | Attribute_Name => Name_Address)))); | |
6283 | end if; | |
6284 | ||
acf97c11 | 6285 | -- Secondary dispatch table referencing thunks to predefined |
6286 | -- primitives. | |
6287 | ||
6288 | Iface_DT_Ptr := | |
6289 | Make_Defining_Identifier (Loc, | |
6290 | Chars => New_External_Name (Typ_Name, 'Y')); | |
6291 | Set_Etype (Iface_DT_Ptr, RTE (RE_Address)); | |
6292 | Set_Ekind (Iface_DT_Ptr, E_Constant); | |
6293 | Set_Is_Tag (Iface_DT_Ptr); | |
6294 | Set_Has_Thunks (Iface_DT_Ptr); | |
2ea346ac | 6295 | Set_Is_Statically_Allocated (Iface_DT_Ptr, |
6296 | Is_Library_Level_Tagged_Type (Typ)); | |
acf97c11 | 6297 | Set_Is_True_Constant (Iface_DT_Ptr); |
6298 | Set_Related_Type | |
6299 | (Iface_DT_Ptr, Related_Type (Node (AI_Tag_Comp))); | |
6300 | Append_Elmt (Iface_DT_Ptr, Access_Disp_Table (Typ)); | |
6301 | ||
6302 | -- Secondary dispatch table referencing user-defined primitives | |
6303 | -- covered by this interface. | |
6304 | ||
cdb1c38f | 6305 | Iface_DT_Ptr := |
6306 | Make_Defining_Identifier (Loc, | |
6307 | Chars => New_External_Name (Typ_Name, 'D')); | |
6308 | Set_Etype (Iface_DT_Ptr, RTE (RE_Interface_Tag)); | |
6309 | Set_Ekind (Iface_DT_Ptr, E_Constant); | |
6310 | Set_Is_Tag (Iface_DT_Ptr); | |
2ea346ac | 6311 | Set_Is_Statically_Allocated (Iface_DT_Ptr, |
6312 | Is_Library_Level_Tagged_Type (Typ)); | |
cdb1c38f | 6313 | Set_Is_True_Constant (Iface_DT_Ptr); |
6314 | Set_Related_Type | |
6315 | (Iface_DT_Ptr, Related_Type (Node (AI_Tag_Comp))); | |
17e14451 | 6316 | Append_Elmt (Iface_DT_Ptr, Access_Disp_Table (Typ)); |
6317 | ||
acf97c11 | 6318 | -- Secondary dispatch table referencing predefined primitives |
6319 | ||
6320 | Iface_DT_Ptr := | |
6321 | Make_Defining_Identifier (Loc, | |
6322 | Chars => New_External_Name (Typ_Name, 'Z')); | |
6323 | Set_Etype (Iface_DT_Ptr, RTE (RE_Address)); | |
6324 | Set_Ekind (Iface_DT_Ptr, E_Constant); | |
6325 | Set_Is_Tag (Iface_DT_Ptr); | |
2ea346ac | 6326 | Set_Is_Statically_Allocated (Iface_DT_Ptr, |
6327 | Is_Library_Level_Tagged_Type (Typ)); | |
acf97c11 | 6328 | Set_Is_True_Constant (Iface_DT_Ptr); |
6329 | Set_Related_Type | |
6330 | (Iface_DT_Ptr, Related_Type (Node (AI_Tag_Comp))); | |
6331 | Append_Elmt (Iface_DT_Ptr, Access_Disp_Table (Typ)); | |
6332 | ||
17e14451 | 6333 | Next_Elmt (AI_Tag_Comp); |
6334 | end loop; | |
6335 | end if; | |
6336 | ||
dffd0a90 | 6337 | -- 3) At the end of Access_Disp_Table, if the type has user-defined |
6338 | -- primitives, we add the entity of an access type declaration that | |
6339 | -- is used by Build_Get_Prim_Op_Address to expand dispatching calls | |
6340 | -- through the primary dispatch table. | |
6341 | ||
6342 | if UI_To_Int (DT_Entry_Count (First_Tag_Component (Typ))) = 0 then | |
6343 | Analyze_List (Result); | |
17e14451 | 6344 | |
6345 | -- Generate: | |
cc60bd16 | 6346 | -- type Typ_DT is array (1 .. Nb_Prims) of Prim_Ptr; |
17e14451 | 6347 | -- type Typ_DT_Acc is access Typ_DT; |
6348 | ||
dffd0a90 | 6349 | else |
6350 | declare | |
6351 | Name_DT_Prims : constant Name_Id := | |
6352 | New_External_Name (Tname, 'G'); | |
6353 | Name_DT_Prims_Acc : constant Name_Id := | |
6354 | New_External_Name (Tname, 'H'); | |
6355 | DT_Prims : constant Entity_Id := | |
6356 | Make_Defining_Identifier (Loc, | |
6357 | Name_DT_Prims); | |
6358 | DT_Prims_Acc : constant Entity_Id := | |
6359 | Make_Defining_Identifier (Loc, | |
6360 | Name_DT_Prims_Acc); | |
6361 | begin | |
6362 | Append_To (Result, | |
6363 | Make_Full_Type_Declaration (Loc, | |
6364 | Defining_Identifier => DT_Prims, | |
6365 | Type_Definition => | |
6366 | Make_Constrained_Array_Definition (Loc, | |
6367 | Discrete_Subtype_Definitions => New_List ( | |
6368 | Make_Range (Loc, | |
6369 | Low_Bound => Make_Integer_Literal (Loc, 1), | |
6370 | High_Bound => Make_Integer_Literal (Loc, | |
6371 | DT_Entry_Count | |
6372 | (First_Tag_Component (Typ))))), | |
6373 | Component_Definition => | |
6374 | Make_Component_Definition (Loc, | |
6375 | Subtype_Indication => | |
6376 | New_Reference_To (RTE (RE_Prim_Ptr), Loc))))); | |
17e14451 | 6377 | |
dffd0a90 | 6378 | Append_To (Result, |
6379 | Make_Full_Type_Declaration (Loc, | |
6380 | Defining_Identifier => DT_Prims_Acc, | |
6381 | Type_Definition => | |
6382 | Make_Access_To_Object_Definition (Loc, | |
6383 | Subtype_Indication => | |
6384 | New_Occurrence_Of (DT_Prims, Loc)))); | |
17e14451 | 6385 | |
dffd0a90 | 6386 | Append_Elmt (DT_Prims_Acc, Access_Disp_Table (Typ)); |
17e14451 | 6387 | |
dffd0a90 | 6388 | -- Analyze the resulting list and suppress the generation of the |
6389 | -- Init_Proc associated with the above array declaration because | |
6390 | -- this type is never used in object declarations. It is only used | |
6391 | -- to simplify the expansion associated with dispatching calls. | |
17e14451 | 6392 | |
dffd0a90 | 6393 | Analyze_List (Result); |
6394 | Set_Suppress_Init_Proc (Base_Type (DT_Prims)); | |
cc60bd16 | 6395 | |
dffd0a90 | 6396 | -- Mark entity of dispatch table. Required by the back end to |
6397 | -- handle them properly. | |
cc60bd16 | 6398 | |
dffd0a90 | 6399 | Set_Is_Dispatch_Table_Entity (DT_Prims); |
6400 | end; | |
6401 | end if; | |
17e14451 | 6402 | |
cdb1c38f | 6403 | Set_Ekind (DT_Ptr, E_Constant); |
6404 | Set_Is_Tag (DT_Ptr); | |
6405 | Set_Related_Type (DT_Ptr, Typ); | |
6406 | ||
17e14451 | 6407 | return Result; |
6408 | end Make_Tags; | |
6409 | ||
cd534f03 | 6410 | --------------- |
6411 | -- New_Value -- | |
6412 | --------------- | |
6413 | ||
6414 | function New_Value (From : Node_Id) return Node_Id is | |
6415 | Res : constant Node_Id := Duplicate_Subexpr (From); | |
6416 | begin | |
6417 | if Is_Access_Type (Etype (From)) then | |
9af28f61 | 6418 | return |
6419 | Make_Explicit_Dereference (Sloc (From), | |
6420 | Prefix => Res); | |
cd534f03 | 6421 | else |
6422 | return Res; | |
6423 | end if; | |
6424 | end New_Value; | |
6425 | ||
3dbca0d5 | 6426 | ------------------- |
6427 | -- New_Scil_Node -- | |
6428 | ------------------- | |
6429 | ||
6430 | function New_Scil_Node | |
6431 | (Nkind : Scil_Node_Kind; | |
6432 | Related_Node : Node_Id; | |
6433 | Entity : Entity_Id := Empty; | |
6434 | Target_Prim : Entity_Id := Empty) return Node_Id | |
6435 | is | |
9af28f61 | 6436 | New_N : constant Node_Id := |
6437 | New_Node (N_Null_Statement, Sloc (Related_Node)); | |
3dbca0d5 | 6438 | begin |
3dbca0d5 | 6439 | Set_Is_Scil_Node (New_N); |
6440 | Set_Scil_Nkind (New_N, UI_From_Int (Scil_Node_Kind'Pos (Nkind))); | |
6441 | Set_Scil_Related_Node (New_N, Related_Node); | |
6442 | Set_Entity (New_N, Entity); | |
6443 | Set_Scil_Target_Prim (New_N, Target_Prim); | |
3dbca0d5 | 6444 | return New_N; |
6445 | end New_Scil_Node; | |
6446 | ||
ee6ba406 | 6447 | ----------------------------------- |
6448 | -- Original_View_In_Visible_Part -- | |
6449 | ----------------------------------- | |
6450 | ||
6451 | function Original_View_In_Visible_Part (Typ : Entity_Id) return Boolean is | |
6452 | Scop : constant Entity_Id := Scope (Typ); | |
6453 | ||
6454 | begin | |
6455 | -- The scope must be a package | |
6456 | ||
65149aa0 | 6457 | if not Is_Package_Or_Generic_Package (Scop) then |
ee6ba406 | 6458 | return False; |
6459 | end if; | |
6460 | ||
6461 | -- A type with a private declaration has a private view declared in | |
6462 | -- the visible part. | |
6463 | ||
6464 | if Has_Private_Declaration (Typ) then | |
6465 | return True; | |
6466 | end if; | |
6467 | ||
6468 | return List_Containing (Parent (Typ)) = | |
6469 | Visible_Declarations (Specification (Unit_Declaration_Node (Scop))); | |
6470 | end Original_View_In_Visible_Part; | |
6471 | ||
d62940bf | 6472 | ------------------ |
6473 | -- Prim_Op_Kind -- | |
6474 | ------------------ | |
6475 | ||
6476 | function Prim_Op_Kind | |
6477 | (Prim : Entity_Id; | |
6478 | Typ : Entity_Id) return Node_Id | |
6479 | is | |
6480 | Full_Typ : Entity_Id := Typ; | |
6481 | Loc : constant Source_Ptr := Sloc (Prim); | |
68f95949 | 6482 | Prim_Op : Entity_Id; |
d62940bf | 6483 | |
6484 | begin | |
6485 | -- Retrieve the original primitive operation | |
6486 | ||
68f95949 | 6487 | Prim_Op := Prim; |
d62940bf | 6488 | while Present (Alias (Prim_Op)) loop |
6489 | Prim_Op := Alias (Prim_Op); | |
6490 | end loop; | |
6491 | ||
6492 | if Ekind (Typ) = E_Record_Type | |
6493 | and then Present (Corresponding_Concurrent_Type (Typ)) | |
6494 | then | |
6495 | Full_Typ := Corresponding_Concurrent_Type (Typ); | |
6496 | end if; | |
6497 | ||
d77e048b | 6498 | -- When a private tagged type is completed by a concurrent type, |
6499 | -- retrieve the full view. | |
6500 | ||
6501 | if Is_Private_Type (Full_Typ) then | |
6502 | Full_Typ := Full_View (Full_Typ); | |
6503 | end if; | |
6504 | ||
d62940bf | 6505 | if Ekind (Prim_Op) = E_Function then |
6506 | ||
6507 | -- Protected function | |
6508 | ||
6509 | if Ekind (Full_Typ) = E_Protected_Type then | |
6510 | return New_Reference_To (RTE (RE_POK_Protected_Function), Loc); | |
6511 | ||
76a1c25b | 6512 | -- Task function |
6513 | ||
6514 | elsif Ekind (Full_Typ) = E_Task_Type then | |
6515 | return New_Reference_To (RTE (RE_POK_Task_Function), Loc); | |
6516 | ||
d62940bf | 6517 | -- Regular function |
6518 | ||
6519 | else | |
6520 | return New_Reference_To (RTE (RE_POK_Function), Loc); | |
6521 | end if; | |
6522 | ||
6523 | else | |
6524 | pragma Assert (Ekind (Prim_Op) = E_Procedure); | |
6525 | ||
6526 | if Ekind (Full_Typ) = E_Protected_Type then | |
6527 | ||
6528 | -- Protected entry | |
6529 | ||
6530 | if Is_Primitive_Wrapper (Prim_Op) | |
6531 | and then Ekind (Wrapped_Entity (Prim_Op)) = E_Entry | |
6532 | then | |
6533 | return New_Reference_To (RTE (RE_POK_Protected_Entry), Loc); | |
6534 | ||
6535 | -- Protected procedure | |
6536 | ||
6537 | else | |
6538 | return New_Reference_To (RTE (RE_POK_Protected_Procedure), Loc); | |
6539 | end if; | |
6540 | ||
6541 | elsif Ekind (Full_Typ) = E_Task_Type then | |
6542 | ||
6543 | -- Task entry | |
6544 | ||
6545 | if Is_Primitive_Wrapper (Prim_Op) | |
6546 | and then Ekind (Wrapped_Entity (Prim_Op)) = E_Entry | |
6547 | then | |
6548 | return New_Reference_To (RTE (RE_POK_Task_Entry), Loc); | |
6549 | ||
6550 | -- Task "procedure". These are the internally Expander-generated | |
6551 | -- procedures (task body for instance). | |
6552 | ||
6553 | else | |
6554 | return New_Reference_To (RTE (RE_POK_Task_Procedure), Loc); | |
6555 | end if; | |
6556 | ||
6557 | -- Regular procedure | |
6558 | ||
6559 | else | |
6560 | return New_Reference_To (RTE (RE_POK_Procedure), Loc); | |
6561 | end if; | |
6562 | end if; | |
6563 | end Prim_Op_Kind; | |
6564 | ||
725a69d2 | 6565 | ------------------------ |
6566 | -- Register_Primitive -- | |
6567 | ------------------------ | |
6568 | ||
49260fa5 | 6569 | function Register_Primitive |
725a69d2 | 6570 | (Loc : Source_Ptr; |
49260fa5 | 6571 | Prim : Entity_Id) return List_Id |
725a69d2 | 6572 | is |
cdb1c38f | 6573 | DT_Ptr : Entity_Id; |
6574 | Iface_Prim : Entity_Id; | |
6575 | Iface_Typ : Entity_Id; | |
6576 | Iface_DT_Ptr : Entity_Id; | |
6577 | Iface_DT_Elmt : Elmt_Id; | |
49260fa5 | 6578 | L : constant List_Id := New_List; |
cdb1c38f | 6579 | Pos : Uint; |
6580 | Tag : Entity_Id; | |
cc60bd16 | 6581 | Tag_Typ : Entity_Id; |
cdb1c38f | 6582 | Thunk_Id : Entity_Id; |
6583 | Thunk_Code : Node_Id; | |
725a69d2 | 6584 | |
6585 | begin | |
6586 | pragma Assert (not Restriction_Active (No_Dispatching_Calls)); | |
6587 | ||
6588 | if not RTE_Available (RE_Tag) then | |
49260fa5 | 6589 | return L; |
725a69d2 | 6590 | end if; |
6591 | ||
a652dd51 | 6592 | if not Present (Interface_Alias (Prim)) then |
cc60bd16 | 6593 | Tag_Typ := Scope (DTC_Entity (Prim)); |
acf97c11 | 6594 | Pos := DT_Position (Prim); |
cc60bd16 | 6595 | Tag := First_Tag_Component (Tag_Typ); |
725a69d2 | 6596 | |
6597 | if Is_Predefined_Dispatching_Operation (Prim) | |
6598 | or else Is_Predefined_Dispatching_Alias (Prim) | |
6599 | then | |
cc60bd16 | 6600 | DT_Ptr := |
6601 | Node (Next_Elmt (First_Elmt (Access_Disp_Table (Tag_Typ)))); | |
6602 | ||
49260fa5 | 6603 | Append_To (L, |
725a69d2 | 6604 | Build_Set_Predefined_Prim_Op_Address (Loc, |
6605 | Tag_Node => New_Reference_To (DT_Ptr, Loc), | |
6606 | Position => Pos, | |
acf97c11 | 6607 | Address_Node => |
cc60bd16 | 6608 | Unchecked_Convert_To (RTE (RE_Prim_Ptr), |
acf97c11 | 6609 | Make_Attribute_Reference (Loc, |
6610 | Prefix => New_Reference_To (Prim, Loc), | |
6611 | Attribute_Name => Name_Unrestricted_Access)))); | |
725a69d2 | 6612 | |
9e7de1e1 | 6613 | -- Register copy of the pointer to the 'size primitive in the TSD |
cc60bd16 | 6614 | |
6615 | if Chars (Prim) = Name_uSize | |
6616 | and then RTE_Record_Component_Available (RE_Size_Func) | |
6617 | then | |
6618 | DT_Ptr := Node (First_Elmt (Access_Disp_Table (Tag_Typ))); | |
49260fa5 | 6619 | Append_To (L, |
cc60bd16 | 6620 | Build_Set_Size_Function (Loc, |
6621 | Tag_Node => New_Reference_To (DT_Ptr, Loc), | |
6622 | Size_Func => Prim)); | |
6623 | end if; | |
6624 | ||
725a69d2 | 6625 | else |
6626 | pragma Assert (Pos /= Uint_0 and then Pos <= DT_Entry_Count (Tag)); | |
6627 | ||
cc60bd16 | 6628 | DT_Ptr := Node (First_Elmt (Access_Disp_Table (Tag_Typ))); |
49260fa5 | 6629 | Append_To (L, |
725a69d2 | 6630 | Build_Set_Prim_Op_Address (Loc, |
cc60bd16 | 6631 | Typ => Tag_Typ, |
725a69d2 | 6632 | Tag_Node => New_Reference_To (DT_Ptr, Loc), |
6633 | Position => Pos, | |
acf97c11 | 6634 | Address_Node => |
cc60bd16 | 6635 | Unchecked_Convert_To (RTE (RE_Prim_Ptr), |
acf97c11 | 6636 | Make_Attribute_Reference (Loc, |
6637 | Prefix => New_Reference_To (Prim, Loc), | |
6638 | Attribute_Name => Name_Unrestricted_Access)))); | |
725a69d2 | 6639 | end if; |
6640 | ||
6641 | -- Ada 2005 (AI-251): Primitive associated with an interface type | |
6642 | -- Generate the code of the thunk only if the interface type is not an | |
6643 | -- immediate ancestor of Typ; otherwise the dispatch table associated | |
6644 | -- with the interface is the primary dispatch table and we have nothing | |
6645 | -- else to do here. | |
6646 | ||
6647 | else | |
cc60bd16 | 6648 | Tag_Typ := Find_Dispatching_Type (Alias (Prim)); |
a652dd51 | 6649 | Iface_Typ := Find_Dispatching_Type (Interface_Alias (Prim)); |
725a69d2 | 6650 | |
6651 | pragma Assert (Is_Interface (Iface_Typ)); | |
6652 | ||
17e14451 | 6653 | Expand_Interface_Thunk (Prim, Thunk_Id, Thunk_Code); |
725a69d2 | 6654 | |
a652dd51 | 6655 | if not Is_Ancestor (Iface_Typ, Tag_Typ) |
725a69d2 | 6656 | and then Present (Thunk_Code) |
6657 | then | |
725a69d2 | 6658 | -- Generate the code necessary to fill the appropriate entry of |
6659 | -- the secondary dispatch table of Prim's controlling type with | |
6660 | -- Thunk_Id's address. | |
6661 | ||
cc60bd16 | 6662 | Iface_DT_Elmt := Find_Interface_ADT (Tag_Typ, Iface_Typ); |
cdb1c38f | 6663 | Iface_DT_Ptr := Node (Iface_DT_Elmt); |
6664 | pragma Assert (Has_Thunks (Iface_DT_Ptr)); | |
6665 | ||
a652dd51 | 6666 | Iface_Prim := Interface_Alias (Prim); |
acf97c11 | 6667 | Pos := DT_Position (Iface_Prim); |
6668 | Tag := First_Tag_Component (Iface_Typ); | |
49260fa5 | 6669 | |
6670 | Prepend_To (L, Thunk_Code); | |
725a69d2 | 6671 | |
6672 | if Is_Predefined_Dispatching_Operation (Prim) | |
6673 | or else Is_Predefined_Dispatching_Alias (Prim) | |
6674 | then | |
cdb1c38f | 6675 | Append_To (L, |
725a69d2 | 6676 | Build_Set_Predefined_Prim_Op_Address (Loc, |
acf97c11 | 6677 | Tag_Node => |
6678 | New_Reference_To (Node (Next_Elmt (Iface_DT_Elmt)), Loc), | |
725a69d2 | 6679 | Position => Pos, |
6680 | Address_Node => | |
cc60bd16 | 6681 | Unchecked_Convert_To (RTE (RE_Prim_Ptr), |
acf97c11 | 6682 | Make_Attribute_Reference (Loc, |
6683 | Prefix => New_Reference_To (Thunk_Id, Loc), | |
6684 | Attribute_Name => Name_Unrestricted_Access)))); | |
cdb1c38f | 6685 | |
acf97c11 | 6686 | Next_Elmt (Iface_DT_Elmt); |
cdb1c38f | 6687 | Next_Elmt (Iface_DT_Elmt); |
6688 | Iface_DT_Ptr := Node (Iface_DT_Elmt); | |
6689 | pragma Assert (not Has_Thunks (Iface_DT_Ptr)); | |
6690 | ||
6691 | Append_To (L, | |
6692 | Build_Set_Predefined_Prim_Op_Address (Loc, | |
acf97c11 | 6693 | Tag_Node => |
6694 | New_Reference_To (Node (Next_Elmt (Iface_DT_Elmt)), Loc), | |
cdb1c38f | 6695 | Position => Pos, |
6696 | Address_Node => | |
cc60bd16 | 6697 | Unchecked_Convert_To (RTE (RE_Prim_Ptr), |
acf97c11 | 6698 | Make_Attribute_Reference (Loc, |
6699 | Prefix => New_Reference_To (Alias (Prim), Loc), | |
6700 | Attribute_Name => Name_Unrestricted_Access)))); | |
cdb1c38f | 6701 | |
725a69d2 | 6702 | else |
6703 | pragma Assert (Pos /= Uint_0 | |
6704 | and then Pos <= DT_Entry_Count (Tag)); | |
6705 | ||
cdb1c38f | 6706 | Append_To (L, |
6707 | Build_Set_Prim_Op_Address (Loc, | |
6708 | Typ => Iface_Typ, | |
6709 | Tag_Node => New_Reference_To (Iface_DT_Ptr, Loc), | |
6710 | Position => Pos, | |
acf97c11 | 6711 | Address_Node => |
cc60bd16 | 6712 | Unchecked_Convert_To (RTE (RE_Prim_Ptr), |
acf97c11 | 6713 | Make_Attribute_Reference (Loc, |
6714 | Prefix => New_Reference_To (Thunk_Id, Loc), | |
6715 | Attribute_Name => Name_Unrestricted_Access)))); | |
cdb1c38f | 6716 | |
acf97c11 | 6717 | Next_Elmt (Iface_DT_Elmt); |
cdb1c38f | 6718 | Next_Elmt (Iface_DT_Elmt); |
6719 | Iface_DT_Ptr := Node (Iface_DT_Elmt); | |
6720 | pragma Assert (not Has_Thunks (Iface_DT_Ptr)); | |
6721 | ||
6722 | Append_To (L, | |
725a69d2 | 6723 | Build_Set_Prim_Op_Address (Loc, |
6724 | Typ => Iface_Typ, | |
6725 | Tag_Node => New_Reference_To (Iface_DT_Ptr, Loc), | |
6726 | Position => Pos, | |
acf97c11 | 6727 | Address_Node => |
cc60bd16 | 6728 | Unchecked_Convert_To (RTE (RE_Prim_Ptr), |
acf97c11 | 6729 | Make_Attribute_Reference (Loc, |
6730 | Prefix => New_Reference_To (Alias (Prim), Loc), | |
6731 | Attribute_Name => Name_Unrestricted_Access)))); | |
cdb1c38f | 6732 | |
725a69d2 | 6733 | end if; |
6734 | end if; | |
6735 | end if; | |
49260fa5 | 6736 | |
6737 | return L; | |
725a69d2 | 6738 | end Register_Primitive; |
6739 | ||
ee6ba406 | 6740 | ------------------------- |
6741 | -- Set_All_DT_Position -- | |
6742 | ------------------------- | |
6743 | ||
6744 | procedure Set_All_DT_Position (Typ : Entity_Id) is | |
ee6ba406 | 6745 | |
aad6babd | 6746 | procedure Validate_Position (Prim : Entity_Id); |
36b938a3 | 6747 | -- Check that the position assigned to Prim is completely safe |
aad6babd | 6748 | -- (it has not been assigned to a previously defined primitive |
6749 | -- operation of Typ) | |
6750 | ||
6751 | ----------------------- | |
6752 | -- Validate_Position -- | |
6753 | ----------------------- | |
6754 | ||
6755 | procedure Validate_Position (Prim : Entity_Id) is | |
af647dc7 | 6756 | Op_Elmt : Elmt_Id; |
6757 | Op : Entity_Id; | |
d62940bf | 6758 | |
aad6babd | 6759 | begin |
af647dc7 | 6760 | -- Aliased primitives are safe |
6761 | ||
6762 | if Present (Alias (Prim)) then | |
6763 | return; | |
6764 | end if; | |
6765 | ||
6766 | Op_Elmt := First_Elmt (Primitive_Operations (Typ)); | |
6767 | while Present (Op_Elmt) loop | |
6768 | Op := Node (Op_Elmt); | |
6769 | ||
6770 | -- No need to check against itself | |
6771 | ||
6772 | if Op = Prim then | |
6773 | null; | |
6774 | ||
aad6babd | 6775 | -- Primitive operations covering abstract interfaces are |
6776 | -- allocated later | |
6777 | ||
a652dd51 | 6778 | elsif Present (Interface_Alias (Op)) then |
aad6babd | 6779 | null; |
6780 | ||
68f95949 | 6781 | -- Predefined dispatching operations are completely safe. They |
6782 | -- are allocated at fixed positions in a separate table. | |
aad6babd | 6783 | |
af647dc7 | 6784 | elsif Is_Predefined_Dispatching_Operation (Op) |
6785 | or else Is_Predefined_Dispatching_Alias (Op) | |
6786 | then | |
aad6babd | 6787 | null; |
ee6ba406 | 6788 | |
aad6babd | 6789 | -- Aliased subprograms are safe |
6790 | ||
af647dc7 | 6791 | elsif Present (Alias (Op)) then |
aad6babd | 6792 | null; |
6793 | ||
af647dc7 | 6794 | elsif DT_Position (Op) = DT_Position (Prim) |
6795 | and then not Is_Predefined_Dispatching_Operation (Op) | |
6796 | and then not Is_Predefined_Dispatching_Operation (Prim) | |
6797 | and then not Is_Predefined_Dispatching_Alias (Op) | |
6798 | and then not Is_Predefined_Dispatching_Alias (Prim) | |
6799 | then | |
d62940bf | 6800 | |
6801 | -- Handle aliased subprograms | |
6802 | ||
6803 | declare | |
6804 | Op_1 : Entity_Id; | |
6805 | Op_2 : Entity_Id; | |
6806 | ||
6807 | begin | |
af647dc7 | 6808 | Op_1 := Op; |
d62940bf | 6809 | loop |
6810 | if Present (Overridden_Operation (Op_1)) then | |
6811 | Op_1 := Overridden_Operation (Op_1); | |
6812 | elsif Present (Alias (Op_1)) then | |
6813 | Op_1 := Alias (Op_1); | |
6814 | else | |
6815 | exit; | |
6816 | end if; | |
6817 | end loop; | |
6818 | ||
6819 | Op_2 := Prim; | |
6820 | loop | |
6821 | if Present (Overridden_Operation (Op_2)) then | |
6822 | Op_2 := Overridden_Operation (Op_2); | |
6823 | elsif Present (Alias (Op_2)) then | |
6824 | Op_2 := Alias (Op_2); | |
6825 | else | |
6826 | exit; | |
6827 | end if; | |
6828 | end loop; | |
6829 | ||
6830 | if Op_1 /= Op_2 then | |
6831 | raise Program_Error; | |
6832 | end if; | |
6833 | end; | |
aad6babd | 6834 | end if; |
6835 | ||
af647dc7 | 6836 | Next_Elmt (Op_Elmt); |
aad6babd | 6837 | end loop; |
6838 | end Validate_Position; | |
6839 | ||
af647dc7 | 6840 | -- Local variables |
6841 | ||
6842 | Parent_Typ : constant Entity_Id := Etype (Typ); | |
af647dc7 | 6843 | First_Prim : constant Elmt_Id := First_Elmt (Primitive_Operations (Typ)); |
6844 | The_Tag : constant Entity_Id := First_Tag_Component (Typ); | |
6845 | ||
6846 | Adjusted : Boolean := False; | |
6847 | Finalized : Boolean := False; | |
6848 | ||
343d35dc | 6849 | Count_Prim : Nat; |
6850 | DT_Length : Nat; | |
6851 | Nb_Prim : Nat; | |
af647dc7 | 6852 | Prim : Entity_Id; |
6853 | Prim_Elmt : Elmt_Id; | |
6854 | ||
aad6babd | 6855 | -- Start of processing for Set_All_DT_Position |
6856 | ||
6857 | begin | |
a652dd51 | 6858 | pragma Assert (Present (First_Tag_Component (Typ))); |
6859 | ||
343d35dc | 6860 | -- Set the DT_Position for each primitive operation. Perform some |
36b938a3 | 6861 | -- sanity checks to avoid to build completely inconsistent dispatch |
343d35dc | 6862 | -- tables. |
ee6ba406 | 6863 | |
343d35dc | 6864 | -- First stage: Set the DTC entity of all the primitive operations |
6865 | -- This is required to properly read the DT_Position attribute in | |
6866 | -- the latter stages. | |
ee6ba406 | 6867 | |
343d35dc | 6868 | Prim_Elmt := First_Prim; |
6869 | Count_Prim := 0; | |
6870 | while Present (Prim_Elmt) loop | |
6871 | Prim := Node (Prim_Elmt); | |
ee6ba406 | 6872 | |
343d35dc | 6873 | -- Predefined primitives have a separate dispatch table |
ee6ba406 | 6874 | |
343d35dc | 6875 | if not (Is_Predefined_Dispatching_Operation (Prim) |
6876 | or else Is_Predefined_Dispatching_Alias (Prim)) | |
6877 | then | |
6878 | Count_Prim := Count_Prim + 1; | |
6879 | end if; | |
ee6ba406 | 6880 | |
725a69d2 | 6881 | Set_DTC_Entity_Value (Typ, Prim); |
ee6ba406 | 6882 | |
343d35dc | 6883 | -- Clear any previous value of the DT_Position attribute. In this |
6884 | -- way we ensure that the final position of all the primitives is | |
36b938a3 | 6885 | -- established by the following stages of this algorithm. |
ee6ba406 | 6886 | |
343d35dc | 6887 | Set_DT_Position (Prim, No_Uint); |
ee6ba406 | 6888 | |
343d35dc | 6889 | Next_Elmt (Prim_Elmt); |
6890 | end loop; | |
ee6ba406 | 6891 | |
343d35dc | 6892 | declare |
acf97c11 | 6893 | Fixed_Prim : array (Int range 0 .. Count_Prim) of Boolean := |
6894 | (others => False); | |
6895 | ||
343d35dc | 6896 | E : Entity_Id; |
ee6ba406 | 6897 | |
725a69d2 | 6898 | procedure Handle_Inherited_Private_Subprograms (Typ : Entity_Id); |
6899 | -- Called if Typ is declared in a nested package or a public child | |
6900 | -- package to handle inherited primitives that were inherited by Typ | |
6901 | -- in the visible part, but whose declaration was deferred because | |
6902 | -- the parent operation was private and not visible at that point. | |
6903 | ||
343d35dc | 6904 | procedure Set_Fixed_Prim (Pos : Nat); |
6905 | -- Sets to true an element of the Fixed_Prim table to indicate | |
6906 | -- that this entry of the dispatch table of Typ is occupied. | |
ee6ba406 | 6907 | |
725a69d2 | 6908 | ------------------------------------------ |
6909 | -- Handle_Inherited_Private_Subprograms -- | |
6910 | ------------------------------------------ | |
6911 | ||
6912 | procedure Handle_Inherited_Private_Subprograms (Typ : Entity_Id) is | |
6913 | Op_List : Elist_Id; | |
6914 | Op_Elmt : Elmt_Id; | |
6915 | Op_Elmt_2 : Elmt_Id; | |
6916 | Prim_Op : Entity_Id; | |
6917 | Parent_Subp : Entity_Id; | |
6918 | ||
6919 | begin | |
6920 | Op_List := Primitive_Operations (Typ); | |
6921 | ||
6922 | Op_Elmt := First_Elmt (Op_List); | |
6923 | while Present (Op_Elmt) loop | |
6924 | Prim_Op := Node (Op_Elmt); | |
6925 | ||
6926 | -- Search primitives that are implicit operations with an | |
6927 | -- internal name whose parent operation has a normal name. | |
6928 | ||
6929 | if Present (Alias (Prim_Op)) | |
6930 | and then Find_Dispatching_Type (Alias (Prim_Op)) /= Typ | |
6931 | and then not Comes_From_Source (Prim_Op) | |
6932 | and then Is_Internal_Name (Chars (Prim_Op)) | |
6933 | and then not Is_Internal_Name (Chars (Alias (Prim_Op))) | |
6934 | then | |
6935 | Parent_Subp := Alias (Prim_Op); | |
6936 | ||
6937 | -- Check if the type has an explicit overriding for this | |
6938 | -- primitive. | |
6939 | ||
6940 | Op_Elmt_2 := Next_Elmt (Op_Elmt); | |
6941 | while Present (Op_Elmt_2) loop | |
6942 | if Chars (Node (Op_Elmt_2)) = Chars (Parent_Subp) | |
6943 | and then Type_Conformant (Prim_Op, Node (Op_Elmt_2)) | |
6944 | then | |
6945 | Set_DT_Position (Prim_Op, DT_Position (Parent_Subp)); | |
6946 | Set_DT_Position (Node (Op_Elmt_2), | |
6947 | DT_Position (Parent_Subp)); | |
6948 | Set_Fixed_Prim (UI_To_Int (DT_Position (Prim_Op))); | |
6949 | ||
6950 | goto Next_Primitive; | |
6951 | end if; | |
6952 | ||
6953 | Next_Elmt (Op_Elmt_2); | |
6954 | end loop; | |
6955 | end if; | |
6956 | ||
6957 | <<Next_Primitive>> | |
6958 | Next_Elmt (Op_Elmt); | |
6959 | end loop; | |
6960 | end Handle_Inherited_Private_Subprograms; | |
6961 | ||
343d35dc | 6962 | -------------------- |
6963 | -- Set_Fixed_Prim -- | |
6964 | -------------------- | |
ee6ba406 | 6965 | |
343d35dc | 6966 | procedure Set_Fixed_Prim (Pos : Nat) is |
ee6ba406 | 6967 | begin |
9e7de1e1 | 6968 | pragma Assert (Pos <= Count_Prim); |
343d35dc | 6969 | Fixed_Prim (Pos) := True; |
6970 | exception | |
6971 | when Constraint_Error => | |
6972 | raise Program_Error; | |
6973 | end Set_Fixed_Prim; | |
ee6ba406 | 6974 | |
343d35dc | 6975 | begin |
725a69d2 | 6976 | -- In case of nested packages and public child package it may be |
6977 | -- necessary a special management on inherited subprograms so that | |
6978 | -- the dispatch table is properly filled. | |
6979 | ||
6980 | if Ekind (Scope (Scope (Typ))) = E_Package | |
6981 | and then Scope (Scope (Typ)) /= Standard_Standard | |
6982 | and then ((Is_Derived_Type (Typ) and then not Is_Private_Type (Typ)) | |
6983 | or else | |
6984 | (Nkind (Parent (Typ)) = N_Private_Extension_Declaration | |
6985 | and then Is_Generic_Type (Typ))) | |
6986 | and then In_Open_Scopes (Scope (Etype (Typ))) | |
6987 | and then Typ = Base_Type (Typ) | |
6988 | then | |
6989 | Handle_Inherited_Private_Subprograms (Typ); | |
6990 | end if; | |
6991 | ||
343d35dc | 6992 | -- Second stage: Register fixed entries |
ee6ba406 | 6993 | |
343d35dc | 6994 | Nb_Prim := 0; |
6995 | Prim_Elmt := First_Prim; | |
6996 | while Present (Prim_Elmt) loop | |
6997 | Prim := Node (Prim_Elmt); | |
ee6ba406 | 6998 | |
343d35dc | 6999 | -- Predefined primitives have a separate table and all its |
7000 | -- entries are at predefined fixed positions. | |
ee6ba406 | 7001 | |
343d35dc | 7002 | if Is_Predefined_Dispatching_Operation (Prim) then |
7003 | Set_DT_Position (Prim, Default_Prim_Op_Position (Prim)); | |
ee6ba406 | 7004 | |
343d35dc | 7005 | elsif Is_Predefined_Dispatching_Alias (Prim) then |
7006 | E := Alias (Prim); | |
7007 | while Present (Alias (E)) loop | |
7008 | E := Alias (E); | |
7009 | end loop; | |
d62940bf | 7010 | |
343d35dc | 7011 | Set_DT_Position (Prim, Default_Prim_Op_Position (E)); |
d62940bf | 7012 | |
343d35dc | 7013 | -- Overriding primitives of ancestor abstract interfaces |
ee6ba406 | 7014 | |
a652dd51 | 7015 | elsif Present (Interface_Alias (Prim)) |
7016 | and then Is_Ancestor | |
7017 | (Find_Dispatching_Type (Interface_Alias (Prim)), Typ) | |
343d35dc | 7018 | then |
7019 | pragma Assert (DT_Position (Prim) = No_Uint | |
a652dd51 | 7020 | and then Present (DTC_Entity (Interface_Alias (Prim)))); |
ee6ba406 | 7021 | |
a652dd51 | 7022 | E := Interface_Alias (Prim); |
343d35dc | 7023 | Set_DT_Position (Prim, DT_Position (E)); |
aad6babd | 7024 | |
343d35dc | 7025 | pragma Assert |
7026 | (DT_Position (Alias (Prim)) = No_Uint | |
7027 | or else DT_Position (Alias (Prim)) = DT_Position (E)); | |
7028 | Set_DT_Position (Alias (Prim), DT_Position (E)); | |
7029 | Set_Fixed_Prim (UI_To_Int (DT_Position (Prim))); | |
af647dc7 | 7030 | |
343d35dc | 7031 | -- Overriding primitives must use the same entry as the |
36b938a3 | 7032 | -- overridden primitive. |
af647dc7 | 7033 | |
a652dd51 | 7034 | elsif not Present (Interface_Alias (Prim)) |
343d35dc | 7035 | and then Present (Alias (Prim)) |
17e14451 | 7036 | and then Chars (Prim) = Chars (Alias (Prim)) |
343d35dc | 7037 | and then Find_Dispatching_Type (Alias (Prim)) /= Typ |
a652dd51 | 7038 | and then Is_Ancestor |
343d35dc | 7039 | (Find_Dispatching_Type (Alias (Prim)), Typ) |
7040 | and then Present (DTC_Entity (Alias (Prim))) | |
af647dc7 | 7041 | then |
343d35dc | 7042 | E := Alias (Prim); |
7043 | Set_DT_Position (Prim, DT_Position (E)); | |
aad6babd | 7044 | |
343d35dc | 7045 | if not Is_Predefined_Dispatching_Alias (E) then |
7046 | Set_Fixed_Prim (UI_To_Int (DT_Position (E))); | |
7047 | end if; | |
9dfe12ae | 7048 | end if; |
ee6ba406 | 7049 | |
aad6babd | 7050 | Next_Elmt (Prim_Elmt); |
7051 | end loop; | |
7052 | ||
343d35dc | 7053 | -- Third stage: Fix the position of all the new primitives |
7054 | -- Entries associated with primitives covering interfaces | |
7055 | -- are handled in a latter round. | |
aad6babd | 7056 | |
343d35dc | 7057 | Prim_Elmt := First_Prim; |
7058 | while Present (Prim_Elmt) loop | |
7059 | Prim := Node (Prim_Elmt); | |
aad6babd | 7060 | |
343d35dc | 7061 | -- Skip primitives previously set entries |
aad6babd | 7062 | |
343d35dc | 7063 | if DT_Position (Prim) /= No_Uint then |
7064 | null; | |
aad6babd | 7065 | |
343d35dc | 7066 | -- Primitives covering interface primitives are handled later |
aad6babd | 7067 | |
a652dd51 | 7068 | elsif Present (Interface_Alias (Prim)) then |
343d35dc | 7069 | null; |
aad6babd | 7070 | |
343d35dc | 7071 | else |
7072 | -- Take the next available position in the DT | |
aad6babd | 7073 | |
343d35dc | 7074 | loop |
7075 | Nb_Prim := Nb_Prim + 1; | |
7076 | pragma Assert (Nb_Prim <= Count_Prim); | |
7077 | exit when not Fixed_Prim (Nb_Prim); | |
7078 | end loop; | |
aad6babd | 7079 | |
343d35dc | 7080 | Set_DT_Position (Prim, UI_From_Int (Nb_Prim)); |
7081 | Set_Fixed_Prim (Nb_Prim); | |
7082 | end if; | |
aad6babd | 7083 | |
343d35dc | 7084 | Next_Elmt (Prim_Elmt); |
7085 | end loop; | |
7086 | end; | |
aad6babd | 7087 | |
343d35dc | 7088 | -- Fourth stage: Complete the decoration of primitives covering |
7089 | -- interfaces (that is, propagate the DT_Position attribute | |
7090 | -- from the aliased primitive) | |
aad6babd | 7091 | |
343d35dc | 7092 | Prim_Elmt := First_Prim; |
7093 | while Present (Prim_Elmt) loop | |
7094 | Prim := Node (Prim_Elmt); | |
aad6babd | 7095 | |
343d35dc | 7096 | if DT_Position (Prim) = No_Uint |
a652dd51 | 7097 | and then Present (Interface_Alias (Prim)) |
343d35dc | 7098 | then |
7099 | pragma Assert (Present (Alias (Prim)) | |
7100 | and then Find_Dispatching_Type (Alias (Prim)) = Typ); | |
aad6babd | 7101 | |
343d35dc | 7102 | -- Check if this entry will be placed in the primary DT |
aad6babd | 7103 | |
a652dd51 | 7104 | if Is_Ancestor |
7105 | (Find_Dispatching_Type (Interface_Alias (Prim)), Typ) | |
ee6ba406 | 7106 | then |
343d35dc | 7107 | pragma Assert (DT_Position (Alias (Prim)) /= No_Uint); |
7108 | Set_DT_Position (Prim, DT_Position (Alias (Prim))); | |
aad6babd | 7109 | |
343d35dc | 7110 | -- Otherwise it will be placed in the secondary DT |
aad6babd | 7111 | |
343d35dc | 7112 | else |
7113 | pragma Assert | |
a652dd51 | 7114 | (DT_Position (Interface_Alias (Prim)) /= No_Uint); |
343d35dc | 7115 | Set_DT_Position (Prim, |
a652dd51 | 7116 | DT_Position (Interface_Alias (Prim))); |
aad6babd | 7117 | end if; |
343d35dc | 7118 | end if; |
aad6babd | 7119 | |
343d35dc | 7120 | Next_Elmt (Prim_Elmt); |
7121 | end loop; | |
d62940bf | 7122 | |
343d35dc | 7123 | -- Generate listing showing the contents of the dispatch tables. |
7124 | -- This action is done before some further static checks because | |
7125 | -- in case of critical errors caused by a wrong dispatch table | |
7126 | -- we need to see the contents of such table. | |
d62940bf | 7127 | |
343d35dc | 7128 | if Debug_Flag_ZZ then |
7129 | Write_DT (Typ); | |
7130 | end if; | |
aad6babd | 7131 | |
343d35dc | 7132 | -- Final stage: Ensure that the table is correct plus some further |
7133 | -- verifications concerning the primitives. | |
aad6babd | 7134 | |
343d35dc | 7135 | Prim_Elmt := First_Prim; |
7136 | DT_Length := 0; | |
7137 | while Present (Prim_Elmt) loop | |
7138 | Prim := Node (Prim_Elmt); | |
aad6babd | 7139 | |
343d35dc | 7140 | -- At this point all the primitives MUST have a position |
acf97c11 | 7141 | -- in the dispatch table. |
aad6babd | 7142 | |
343d35dc | 7143 | if DT_Position (Prim) = No_Uint then |
7144 | raise Program_Error; | |
7145 | end if; | |
aad6babd | 7146 | |
343d35dc | 7147 | -- Calculate real size of the dispatch table |
aad6babd | 7148 | |
343d35dc | 7149 | if not (Is_Predefined_Dispatching_Operation (Prim) |
7150 | or else Is_Predefined_Dispatching_Alias (Prim)) | |
7151 | and then UI_To_Int (DT_Position (Prim)) > DT_Length | |
7152 | then | |
7153 | DT_Length := UI_To_Int (DT_Position (Prim)); | |
7154 | end if; | |
aad6babd | 7155 | |
36b938a3 | 7156 | -- Ensure that the assigned position to non-predefined |
343d35dc | 7157 | -- dispatching operations in the dispatch table is correct. |
aad6babd | 7158 | |
343d35dc | 7159 | if not (Is_Predefined_Dispatching_Operation (Prim) |
7160 | or else Is_Predefined_Dispatching_Alias (Prim)) | |
7161 | then | |
7162 | Validate_Position (Prim); | |
7163 | end if; | |
ee6ba406 | 7164 | |
343d35dc | 7165 | if Chars (Prim) = Name_Finalize then |
7166 | Finalized := True; | |
7167 | end if; | |
ee6ba406 | 7168 | |
343d35dc | 7169 | if Chars (Prim) = Name_Adjust then |
7170 | Adjusted := True; | |
7171 | end if; | |
af647dc7 | 7172 | |
343d35dc | 7173 | -- An abstract operation cannot be declared in the private part |
7174 | -- for a visible abstract type, because it could never be over- | |
7175 | -- ridden. For explicit declarations this is checked at the | |
7176 | -- point of declaration, but for inherited operations it must | |
7177 | -- be done when building the dispatch table. | |
7178 | ||
a652dd51 | 7179 | -- Ada 2005 (AI-251): Primitives associated with interfaces are |
7180 | -- excluded from this check because interfaces must be visible in | |
7181 | -- the public and private part (RM 7.3 (7.3/2)) | |
343d35dc | 7182 | |
7183 | if Is_Abstract_Type (Typ) | |
7184 | and then Is_Abstract_Subprogram (Prim) | |
7185 | and then Present (Alias (Prim)) | |
a652dd51 | 7186 | and then not Is_Interface |
7187 | (Find_Dispatching_Type (Ultimate_Alias (Prim))) | |
7188 | and then not Present (Interface_Alias (Prim)) | |
343d35dc | 7189 | and then Is_Derived_Type (Typ) |
7190 | and then In_Private_Part (Current_Scope) | |
7191 | and then | |
7192 | List_Containing (Parent (Prim)) = | |
7193 | Private_Declarations | |
7194 | (Specification (Unit_Declaration_Node (Current_Scope))) | |
7195 | and then Original_View_In_Visible_Part (Typ) | |
7196 | then | |
7197 | -- We exclude Input and Output stream operations because | |
7198 | -- Limited_Controlled inherits useless Input and Output | |
7199 | -- stream operations from Root_Controlled, which can | |
7200 | -- never be overridden. | |
ee6ba406 | 7201 | |
343d35dc | 7202 | if not Is_TSS (Prim, TSS_Stream_Input) |
7203 | and then | |
7204 | not Is_TSS (Prim, TSS_Stream_Output) | |
ee6ba406 | 7205 | then |
343d35dc | 7206 | Error_Msg_NE |
7207 | ("abstract inherited private operation&" & | |
17e14451 | 7208 | " must be overridden (RM 3.9.3(10))", |
343d35dc | 7209 | Parent (Typ), Prim); |
ee6ba406 | 7210 | end if; |
343d35dc | 7211 | end if; |
aad6babd | 7212 | |
343d35dc | 7213 | Next_Elmt (Prim_Elmt); |
7214 | end loop; | |
ee6ba406 | 7215 | |
343d35dc | 7216 | -- Additional check |
aad6babd | 7217 | |
343d35dc | 7218 | if Is_Controlled (Typ) then |
7219 | if not Finalized then | |
7220 | Error_Msg_N | |
7221 | ("controlled type has no explicit Finalize method?", Typ); | |
ee6ba406 | 7222 | |
343d35dc | 7223 | elsif not Adjusted then |
7224 | Error_Msg_N | |
7225 | ("controlled type has no explicit Adjust method?", Typ); | |
ee6ba406 | 7226 | end if; |
343d35dc | 7227 | end if; |
ee6ba406 | 7228 | |
343d35dc | 7229 | -- Set the final size of the Dispatch Table |
aad6babd | 7230 | |
343d35dc | 7231 | Set_DT_Entry_Count (The_Tag, UI_From_Int (DT_Length)); |
ee6ba406 | 7232 | |
725a69d2 | 7233 | -- The derived type must have at least as many components as its parent |
acf97c11 | 7234 | -- (for root types Etype points to itself and the test cannot fail). |
aad6babd | 7235 | |
725a69d2 | 7236 | if DT_Entry_Count (The_Tag) < |
7237 | DT_Entry_Count (First_Tag_Component (Parent_Typ)) | |
7238 | then | |
7239 | raise Program_Error; | |
aad6babd | 7240 | end if; |
ee6ba406 | 7241 | end Set_All_DT_Position; |
7242 | ||
294b942d | 7243 | -------------------------- |
7244 | -- Set_CPP_Constructors -- | |
7245 | -------------------------- | |
ee6ba406 | 7246 | |
294b942d | 7247 | procedure Set_CPP_Constructors (Typ : Entity_Id) is |
ee6ba406 | 7248 | Loc : Source_Ptr; |
7249 | Init : Entity_Id; | |
ee6ba406 | 7250 | E : Entity_Id; |
294b942d | 7251 | Found : Boolean := False; |
7252 | P : Node_Id; | |
7253 | Parms : List_Id; | |
ee6ba406 | 7254 | |
7255 | begin | |
294b942d | 7256 | -- Look for the constructor entities |
ee6ba406 | 7257 | |
7258 | E := Next_Entity (Typ); | |
294b942d | 7259 | while Present (E) loop |
7260 | if Ekind (E) = E_Function | |
7261 | and then Is_Constructor (E) | |
7262 | then | |
7263 | -- Create the init procedure | |
7264 | ||
7265 | Found := True; | |
7266 | Loc := Sloc (E); | |
7267 | Init := Make_Defining_Identifier (Loc, Make_Init_Proc_Name (Typ)); | |
7268 | Parms := | |
7269 | New_List ( | |
7270 | Make_Parameter_Specification (Loc, | |
7271 | Defining_Identifier => | |
7272 | Make_Defining_Identifier (Loc, Name_X), | |
7273 | Parameter_Type => | |
7274 | New_Reference_To (Typ, Loc))); | |
7275 | ||
7276 | if Present (Parameter_Specifications (Parent (E))) then | |
7277 | P := First (Parameter_Specifications (Parent (E))); | |
7278 | while Present (P) loop | |
7279 | Append_To (Parms, | |
7280 | Make_Parameter_Specification (Loc, | |
7281 | Defining_Identifier => | |
7282 | Make_Defining_Identifier (Loc, | |
7283 | Chars (Defining_Identifier (P))), | |
7284 | Parameter_Type => New_Copy_Tree (Parameter_Type (P)))); | |
7285 | Next (P); | |
7286 | end loop; | |
7287 | end if; | |
7288 | ||
7289 | Discard_Node ( | |
7290 | Make_Subprogram_Declaration (Loc, | |
7291 | Make_Procedure_Specification (Loc, | |
7292 | Defining_Unit_Name => Init, | |
7293 | Parameter_Specifications => Parms))); | |
7294 | ||
7295 | Set_Init_Proc (Typ, Init); | |
7296 | Set_Is_Imported (Init); | |
7297 | Set_Interface_Name (Init, Interface_Name (E)); | |
7298 | Set_Convention (Init, Convention_C); | |
7299 | Set_Is_Public (Init); | |
7300 | Set_Has_Completion (Init); | |
7301 | end if; | |
7302 | ||
ee6ba406 | 7303 | Next_Entity (E); |
7304 | end loop; | |
7305 | ||
9dfe12ae | 7306 | -- If there are no constructors, mark the type as abstract since we |
ee6ba406 | 7307 | -- won't be able to declare objects of that type. |
7308 | ||
294b942d | 7309 | if not Found then |
343d35dc | 7310 | Set_Is_Abstract_Type (Typ); |
ee6ba406 | 7311 | end if; |
294b942d | 7312 | end Set_CPP_Constructors; |
ee6ba406 | 7313 | |
725a69d2 | 7314 | -------------------------- |
7315 | -- Set_DTC_Entity_Value -- | |
7316 | -------------------------- | |
7317 | ||
7318 | procedure Set_DTC_Entity_Value | |
7319 | (Tagged_Type : Entity_Id; | |
7320 | Prim : Entity_Id) | |
7321 | is | |
7322 | begin | |
a652dd51 | 7323 | if Present (Interface_Alias (Prim)) |
725a69d2 | 7324 | and then Is_Interface |
a652dd51 | 7325 | (Find_Dispatching_Type (Interface_Alias (Prim))) |
725a69d2 | 7326 | then |
7327 | Set_DTC_Entity (Prim, | |
7328 | Find_Interface_Tag | |
7329 | (T => Tagged_Type, | |
a652dd51 | 7330 | Iface => Find_Dispatching_Type (Interface_Alias (Prim)))); |
725a69d2 | 7331 | else |
7332 | Set_DTC_Entity (Prim, | |
7333 | First_Tag_Component (Tagged_Type)); | |
7334 | end if; | |
7335 | end Set_DTC_Entity_Value; | |
7336 | ||
952af0b9 | 7337 | ----------------- |
7338 | -- Tagged_Kind -- | |
7339 | ----------------- | |
7340 | ||
7341 | function Tagged_Kind (T : Entity_Id) return Node_Id is | |
7342 | Conc_Typ : Entity_Id; | |
7343 | Loc : constant Source_Ptr := Sloc (T); | |
7344 | ||
7345 | begin | |
68f95949 | 7346 | pragma Assert |
7347 | (Is_Tagged_Type (T) and then RTE_Available (RE_Tagged_Kind)); | |
952af0b9 | 7348 | |
7349 | -- Abstract kinds | |
7350 | ||
343d35dc | 7351 | if Is_Abstract_Type (T) then |
952af0b9 | 7352 | if Is_Limited_Record (T) then |
7353 | return New_Reference_To (RTE (RE_TK_Abstract_Limited_Tagged), Loc); | |
7354 | else | |
7355 | return New_Reference_To (RTE (RE_TK_Abstract_Tagged), Loc); | |
7356 | end if; | |
7357 | ||
7358 | -- Concurrent kinds | |
7359 | ||
7360 | elsif Is_Concurrent_Record_Type (T) then | |
7361 | Conc_Typ := Corresponding_Concurrent_Type (T); | |
7362 | ||
17e14451 | 7363 | if Present (Full_View (Conc_Typ)) then |
7364 | Conc_Typ := Full_View (Conc_Typ); | |
7365 | end if; | |
7366 | ||
952af0b9 | 7367 | if Ekind (Conc_Typ) = E_Protected_Type then |
7368 | return New_Reference_To (RTE (RE_TK_Protected), Loc); | |
7369 | else | |
7370 | pragma Assert (Ekind (Conc_Typ) = E_Task_Type); | |
7371 | return New_Reference_To (RTE (RE_TK_Task), Loc); | |
7372 | end if; | |
7373 | ||
7374 | -- Regular tagged kinds | |
7375 | ||
7376 | else | |
7377 | if Is_Limited_Record (T) then | |
7378 | return New_Reference_To (RTE (RE_TK_Limited_Tagged), Loc); | |
7379 | else | |
7380 | return New_Reference_To (RTE (RE_TK_Tagged), Loc); | |
7381 | end if; | |
7382 | end if; | |
7383 | end Tagged_Kind; | |
7384 | ||
aad6babd | 7385 | -------------- |
7386 | -- Write_DT -- | |
7387 | -------------- | |
7388 | ||
7389 | procedure Write_DT (Typ : Entity_Id) is | |
7390 | Elmt : Elmt_Id; | |
7391 | Prim : Node_Id; | |
7392 | ||
7393 | begin | |
7394 | -- Protect this procedure against wrong usage. Required because it will | |
7395 | -- be used directly from GDB | |
7396 | ||
17e14451 | 7397 | if not (Typ <= Last_Node_Id) |
aad6babd | 7398 | or else not Is_Tagged_Type (Typ) |
7399 | then | |
d62940bf | 7400 | Write_Str ("wrong usage: Write_DT must be used with tagged types"); |
aad6babd | 7401 | Write_Eol; |
7402 | return; | |
7403 | end if; | |
7404 | ||
7405 | Write_Int (Int (Typ)); | |
7406 | Write_Str (": "); | |
7407 | Write_Name (Chars (Typ)); | |
7408 | ||
7409 | if Is_Interface (Typ) then | |
7410 | Write_Str (" is interface"); | |
7411 | end if; | |
7412 | ||
7413 | Write_Eol; | |
7414 | ||
7415 | Elmt := First_Elmt (Primitive_Operations (Typ)); | |
7416 | while Present (Elmt) loop | |
7417 | Prim := Node (Elmt); | |
7418 | Write_Str (" - "); | |
7419 | ||
7420 | -- Indicate if this primitive will be allocated in the primary | |
7421 | -- dispatch table or in a secondary dispatch table associated | |
7422 | -- with an abstract interface type | |
7423 | ||
7424 | if Present (DTC_Entity (Prim)) then | |
7425 | if Etype (DTC_Entity (Prim)) = RTE (RE_Tag) then | |
7426 | Write_Str ("[P] "); | |
7427 | else | |
7428 | Write_Str ("[s] "); | |
7429 | end if; | |
7430 | end if; | |
7431 | ||
7432 | -- Output the node of this primitive operation and its name | |
7433 | ||
7434 | Write_Int (Int (Prim)); | |
7435 | Write_Str (": "); | |
68f95949 | 7436 | |
7437 | if Is_Predefined_Dispatching_Operation (Prim) then | |
7438 | Write_Str ("(predefined) "); | |
7439 | end if; | |
7440 | ||
aad6babd | 7441 | Write_Name (Chars (Prim)); |
7442 | ||
7443 | -- Indicate if this primitive has an aliased primitive | |
7444 | ||
7445 | if Present (Alias (Prim)) then | |
7446 | Write_Str (" (alias = "); | |
7447 | Write_Int (Int (Alias (Prim))); | |
7448 | ||
7449 | -- If the DTC_Entity attribute is already set we can also output | |
7450 | -- the name of the interface covered by this primitive (if any) | |
7451 | ||
7452 | if Present (DTC_Entity (Alias (Prim))) | |
7453 | and then Is_Interface (Scope (DTC_Entity (Alias (Prim)))) | |
7454 | then | |
7455 | Write_Str (" from interface "); | |
7456 | Write_Name (Chars (Scope (DTC_Entity (Alias (Prim))))); | |
7457 | end if; | |
7458 | ||
a652dd51 | 7459 | if Present (Interface_Alias (Prim)) then |
aad6babd | 7460 | Write_Str (", AI_Alias of "); |
a652dd51 | 7461 | Write_Name |
7462 | (Chars (Find_Dispatching_Type (Interface_Alias (Prim)))); | |
aad6babd | 7463 | Write_Char (':'); |
a652dd51 | 7464 | Write_Int (Int (Interface_Alias (Prim))); |
aad6babd | 7465 | end if; |
7466 | ||
7467 | Write_Str (")"); | |
7468 | end if; | |
7469 | ||
7470 | -- Display the final position of this primitive in its associated | |
7471 | -- (primary or secondary) dispatch table | |
7472 | ||
7473 | if Present (DTC_Entity (Prim)) | |
7474 | and then DT_Position (Prim) /= No_Uint | |
7475 | then | |
7476 | Write_Str (" at #"); | |
7477 | Write_Int (UI_To_Int (DT_Position (Prim))); | |
7478 | end if; | |
7479 | ||
343d35dc | 7480 | if Is_Abstract_Subprogram (Prim) then |
aad6babd | 7481 | Write_Str (" is abstract;"); |
af647dc7 | 7482 | |
7483 | -- Check if this is a null primitive | |
7484 | ||
7485 | elsif Comes_From_Source (Prim) | |
7486 | and then Ekind (Prim) = E_Procedure | |
7487 | and then Null_Present (Parent (Prim)) | |
7488 | then | |
7489 | Write_Str (" is null;"); | |
aad6babd | 7490 | end if; |
7491 | ||
555c63a6 | 7492 | if Is_Eliminated (Ultimate_Alias (Prim)) then |
7493 | Write_Str (" (eliminated)"); | |
7494 | end if; | |
7495 | ||
aad6babd | 7496 | Write_Eol; |
7497 | ||
7498 | Next_Elmt (Elmt); | |
7499 | end loop; | |
7500 | end Write_DT; | |
7501 | ||
ee6ba406 | 7502 | end Exp_Disp; |