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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 | |
ee6ba406 | 83 | function Original_View_In_Visible_Part (Typ : Entity_Id) return Boolean; |
84 | -- Check if the type has a private view or if the public view appears | |
85 | -- in the visible part of a package spec. | |
86 | ||
d62940bf | 87 | function Prim_Op_Kind |
88 | (Prim : Entity_Id; | |
89 | Typ : Entity_Id) return Node_Id; | |
90 | -- Ada 2005 (AI-345): Determine the primitive operation kind of Prim | |
952af0b9 | 91 | -- according to its type Typ. Return a reference to an RE_Prim_Op_Kind |
d62940bf | 92 | -- enumeration value. |
aad6babd | 93 | |
952af0b9 | 94 | function Tagged_Kind (T : Entity_Id) return Node_Id; |
95 | -- Ada 2005 (AI-345): Determine the tagged kind of T and return a reference | |
96 | -- to an RE_Tagged_Kind enumeration value. | |
97 | ||
24971415 | 98 | ------------------------ |
99 | -- Building_Static_DT -- | |
100 | ------------------------ | |
101 | ||
102 | function Building_Static_DT (Typ : Entity_Id) return Boolean is | |
cc60bd16 | 103 | Root_Typ : Entity_Id := Root_Type (Typ); |
104 | ||
24971415 | 105 | begin |
cc60bd16 | 106 | -- Handle private types |
107 | ||
108 | if Present (Full_View (Root_Typ)) then | |
109 | Root_Typ := Full_View (Root_Typ); | |
110 | end if; | |
111 | ||
24971415 | 112 | return Static_Dispatch_Tables |
e7e688dd | 113 | and then Is_Library_Level_Tagged_Type (Typ) |
114 | ||
115 | -- If the type is derived from a CPP class we cannot statically | |
116 | -- build the dispatch tables because we must inherit primitives | |
117 | -- from the CPP side. | |
118 | ||
cc60bd16 | 119 | and then not Is_CPP_Class (Root_Typ); |
24971415 | 120 | end Building_Static_DT; |
121 | ||
17e14451 | 122 | ---------------------------------- |
123 | -- Build_Static_Dispatch_Tables -- | |
124 | ---------------------------------- | |
125 | ||
126 | procedure Build_Static_Dispatch_Tables (N : Entity_Id) is | |
127 | Target_List : List_Id; | |
128 | ||
129 | procedure Build_Dispatch_Tables (List : List_Id); | |
130 | -- Build the static dispatch table of tagged types found in the list of | |
131 | -- declarations. The generated nodes are added at the end of Target_List | |
132 | ||
133 | procedure Build_Package_Dispatch_Tables (N : Node_Id); | |
134 | -- Build static dispatch tables associated with package declaration N | |
135 | ||
136 | --------------------------- | |
137 | -- Build_Dispatch_Tables -- | |
138 | --------------------------- | |
139 | ||
140 | procedure Build_Dispatch_Tables (List : List_Id) is | |
141 | D : Node_Id; | |
142 | ||
143 | begin | |
144 | D := First (List); | |
145 | while Present (D) loop | |
146 | ||
147 | -- Handle nested packages and package bodies recursively. The | |
148 | -- generated code is placed on the Target_List established for | |
149 | -- the enclosing compilation unit. | |
150 | ||
151 | if Nkind (D) = N_Package_Declaration then | |
152 | Build_Package_Dispatch_Tables (D); | |
153 | ||
154 | elsif Nkind (D) = N_Package_Body then | |
155 | Build_Dispatch_Tables (Declarations (D)); | |
156 | ||
157 | elsif Nkind (D) = N_Package_Body_Stub | |
158 | and then Present (Library_Unit (D)) | |
159 | then | |
160 | Build_Dispatch_Tables | |
161 | (Declarations (Proper_Body (Unit (Library_Unit (D))))); | |
162 | ||
163 | -- Handle full type declarations and derivations of library | |
164 | -- level tagged types | |
165 | ||
3164ed99 | 166 | elsif Nkind_In (D, N_Full_Type_Declaration, |
167 | N_Derived_Type_Definition) | |
17e14451 | 168 | and then Is_Library_Level_Tagged_Type (Defining_Entity (D)) |
169 | and then Ekind (Defining_Entity (D)) /= E_Record_Subtype | |
170 | and then not Is_Private_Type (Defining_Entity (D)) | |
171 | then | |
442049cc | 172 | -- We do not generate dispatch tables for the internal types |
d9fac90e | 173 | -- created for a type extension with unknown discriminants |
174 | -- The needed information is shared with the source type, | |
175 | -- See Expand_N_Record_Extension. | |
176 | ||
442049cc | 177 | if Is_Underlying_Record_View (Defining_Entity (D)) |
178 | or else | |
179 | (not Comes_From_Source (Defining_Entity (D)) | |
180 | and then | |
2f29393f | 181 | Has_Unknown_Discriminants (Etype (Defining_Entity (D))) |
442049cc | 182 | and then |
2f29393f | 183 | not Comes_From_Source |
184 | (First_Subtype (Defining_Entity (D)))) | |
d9fac90e | 185 | then |
186 | null; | |
d9fac90e | 187 | else |
188 | Insert_List_After_And_Analyze (Last (Target_List), | |
189 | Make_DT (Defining_Entity (D))); | |
190 | end if; | |
17e14451 | 191 | |
192 | -- Handle private types of library level tagged types. We must | |
193 | -- exchange the private and full-view to ensure the correct | |
a735d663 | 194 | -- expansion. If the full view is a synchronized type ignore |
195 | -- the type because the table will be built for the corresponding | |
196 | -- record type, that has its own declaration. | |
17e14451 | 197 | |
198 | elsif (Nkind (D) = N_Private_Type_Declaration | |
199 | or else Nkind (D) = N_Private_Extension_Declaration) | |
200 | and then Present (Full_View (Defining_Entity (D))) | |
17e14451 | 201 | then |
202 | declare | |
acf97c11 | 203 | E1 : constant Entity_Id := Defining_Entity (D); |
a735d663 | 204 | E2 : constant Entity_Id := Full_View (E1); |
acf97c11 | 205 | |
17e14451 | 206 | begin |
a735d663 | 207 | if Is_Library_Level_Tagged_Type (E2) |
208 | and then Ekind (E2) /= E_Record_Subtype | |
209 | and then not Is_Concurrent_Type (E2) | |
210 | then | |
211 | Exchange_Declarations (E1); | |
212 | Insert_List_After_And_Analyze (Last (Target_List), | |
213 | Make_DT (E1)); | |
214 | Exchange_Declarations (E2); | |
215 | end if; | |
17e14451 | 216 | end; |
217 | end if; | |
218 | ||
219 | Next (D); | |
220 | end loop; | |
221 | end Build_Dispatch_Tables; | |
222 | ||
223 | ----------------------------------- | |
224 | -- Build_Package_Dispatch_Tables -- | |
225 | ----------------------------------- | |
226 | ||
227 | procedure Build_Package_Dispatch_Tables (N : Node_Id) is | |
228 | Spec : constant Node_Id := Specification (N); | |
229 | Id : constant Entity_Id := Defining_Entity (N); | |
230 | Vis_Decls : constant List_Id := Visible_Declarations (Spec); | |
231 | Priv_Decls : constant List_Id := Private_Declarations (Spec); | |
232 | ||
233 | begin | |
234 | Push_Scope (Id); | |
235 | ||
236 | if Present (Priv_Decls) then | |
237 | Build_Dispatch_Tables (Vis_Decls); | |
238 | Build_Dispatch_Tables (Priv_Decls); | |
239 | ||
240 | elsif Present (Vis_Decls) then | |
241 | Build_Dispatch_Tables (Vis_Decls); | |
242 | end if; | |
243 | ||
244 | Pop_Scope; | |
245 | end Build_Package_Dispatch_Tables; | |
246 | ||
247 | -- Start of processing for Build_Static_Dispatch_Tables | |
248 | ||
249 | begin | |
250 | if not Expander_Active | |
662256db | 251 | or else not Tagged_Type_Expansion |
17e14451 | 252 | then |
253 | return; | |
254 | end if; | |
255 | ||
256 | if Nkind (N) = N_Package_Declaration then | |
257 | declare | |
258 | Spec : constant Node_Id := Specification (N); | |
259 | Vis_Decls : constant List_Id := Visible_Declarations (Spec); | |
260 | Priv_Decls : constant List_Id := Private_Declarations (Spec); | |
261 | ||
262 | begin | |
263 | if Present (Priv_Decls) | |
264 | and then Is_Non_Empty_List (Priv_Decls) | |
265 | then | |
266 | Target_List := Priv_Decls; | |
267 | ||
268 | elsif not Present (Vis_Decls) then | |
269 | Target_List := New_List; | |
270 | Set_Private_Declarations (Spec, Target_List); | |
271 | else | |
272 | Target_List := Vis_Decls; | |
273 | end if; | |
274 | ||
275 | Build_Package_Dispatch_Tables (N); | |
276 | end; | |
277 | ||
278 | else pragma Assert (Nkind (N) = N_Package_Body); | |
279 | Target_List := Declarations (N); | |
280 | Build_Dispatch_Tables (Target_List); | |
281 | end if; | |
282 | end Build_Static_Dispatch_Tables; | |
283 | ||
aad6babd | 284 | ------------------------------ |
285 | -- Default_Prim_Op_Position -- | |
286 | ------------------------------ | |
287 | ||
68f95949 | 288 | function Default_Prim_Op_Position (E : Entity_Id) return Uint is |
aad6babd | 289 | TSS_Name : TSS_Name_Type; |
aad6babd | 290 | |
291 | begin | |
aad6babd | 292 | Get_Name_String (Chars (E)); |
293 | TSS_Name := | |
294 | TSS_Name_Type | |
295 | (Name_Buffer (Name_Len - TSS_Name'Length + 1 .. Name_Len)); | |
296 | ||
297 | if Chars (E) = Name_uSize then | |
298 | return Uint_1; | |
299 | ||
300 | elsif Chars (E) = Name_uAlignment then | |
301 | return Uint_2; | |
302 | ||
303 | elsif TSS_Name = TSS_Stream_Read then | |
304 | return Uint_3; | |
305 | ||
306 | elsif TSS_Name = TSS_Stream_Write then | |
307 | return Uint_4; | |
308 | ||
309 | elsif TSS_Name = TSS_Stream_Input then | |
310 | return Uint_5; | |
311 | ||
312 | elsif TSS_Name = TSS_Stream_Output then | |
313 | return Uint_6; | |
314 | ||
315 | elsif Chars (E) = Name_Op_Eq then | |
316 | return Uint_7; | |
317 | ||
318 | elsif Chars (E) = Name_uAssign then | |
319 | return Uint_8; | |
320 | ||
321 | elsif TSS_Name = TSS_Deep_Adjust then | |
322 | return Uint_9; | |
323 | ||
324 | elsif TSS_Name = TSS_Deep_Finalize then | |
325 | return Uint_10; | |
326 | ||
76a1c25b | 327 | elsif Ada_Version >= Ada_05 then |
328 | if Chars (E) = Name_uDisp_Asynchronous_Select then | |
329 | return Uint_11; | |
d62940bf | 330 | |
76a1c25b | 331 | elsif Chars (E) = Name_uDisp_Conditional_Select then |
332 | return Uint_12; | |
d62940bf | 333 | |
76a1c25b | 334 | elsif Chars (E) = Name_uDisp_Get_Prim_Op_Kind then |
335 | return Uint_13; | |
d62940bf | 336 | |
76a1c25b | 337 | elsif Chars (E) = Name_uDisp_Get_Task_Id then |
338 | return Uint_14; | |
d62940bf | 339 | |
cdb1c38f | 340 | elsif Chars (E) = Name_uDisp_Requeue then |
76a1c25b | 341 | return Uint_15; |
cdb1c38f | 342 | |
343 | elsif Chars (E) = Name_uDisp_Timed_Select then | |
344 | return Uint_16; | |
76a1c25b | 345 | end if; |
aad6babd | 346 | end if; |
76a1c25b | 347 | |
348 | raise Program_Error; | |
aad6babd | 349 | end Default_Prim_Op_Position; |
350 | ||
7189d17f | 351 | ----------------------------- |
352 | -- Expand_Dispatching_Call -- | |
353 | ----------------------------- | |
ee6ba406 | 354 | |
7189d17f | 355 | procedure Expand_Dispatching_Call (Call_Node : Node_Id) is |
ee6ba406 | 356 | Loc : constant Source_Ptr := Sloc (Call_Node); |
357 | Call_Typ : constant Entity_Id := Etype (Call_Node); | |
358 | ||
2ea346ac | 359 | Ctrl_Arg : constant Node_Id := Controlling_Argument (Call_Node); |
360 | Ctrl_Typ : constant Entity_Id := Base_Type (Etype (Ctrl_Arg)); | |
361 | Param_List : constant List_Id := Parameter_Associations (Call_Node); | |
ee6ba406 | 362 | |
af647dc7 | 363 | Subp : Entity_Id; |
7189d17f | 364 | CW_Typ : Entity_Id; |
365 | New_Call : Node_Id; | |
366 | New_Call_Name : Node_Id; | |
367 | New_Params : List_Id := No_List; | |
368 | Param : Node_Id; | |
369 | Res_Typ : Entity_Id; | |
370 | Subp_Ptr_Typ : Entity_Id; | |
371 | Subp_Typ : Entity_Id; | |
372 | Typ : Entity_Id; | |
373 | Eq_Prim_Op : Entity_Id := Empty; | |
374 | Controlling_Tag : Node_Id; | |
ee6ba406 | 375 | |
376 | function New_Value (From : Node_Id) return Node_Id; | |
9dfe12ae | 377 | -- From is the original Expression. New_Value is equivalent to a call |
378 | -- to Duplicate_Subexpr with an explicit dereference when From is an | |
7189d17f | 379 | -- access parameter. |
380 | ||
9dfe12ae | 381 | --------------- |
382 | -- New_Value -- | |
383 | --------------- | |
384 | ||
ee6ba406 | 385 | function New_Value (From : Node_Id) return Node_Id is |
386 | Res : constant Node_Id := Duplicate_Subexpr (From); | |
ee6ba406 | 387 | begin |
388 | if Is_Access_Type (Etype (From)) then | |
af647dc7 | 389 | return |
390 | Make_Explicit_Dereference (Sloc (From), | |
391 | Prefix => Res); | |
ee6ba406 | 392 | else |
393 | return Res; | |
394 | end if; | |
395 | end New_Value; | |
396 | ||
7189d17f | 397 | -- Start of processing for Expand_Dispatching_Call |
ee6ba406 | 398 | |
399 | begin | |
725a69d2 | 400 | if No_Run_Time_Mode then |
401 | Error_Msg_CRT ("tagged types", Call_Node); | |
402 | return; | |
403 | end if; | |
404 | ||
343d35dc | 405 | -- Expand_Dispatching_Call is called directly from the semantics, |
406 | -- so we need a check to see whether expansion is active before | |
407 | -- proceeding. In addition, there is no need to expand the call | |
408 | -- if we are compiling under restriction No_Dispatching_Calls; | |
409 | -- the semantic analyzer has previously notified the violation | |
410 | -- of this restriction. | |
411 | ||
412 | if not Expander_Active | |
413 | or else Restriction_Active (No_Dispatching_Calls) | |
414 | then | |
415 | return; | |
416 | end if; | |
68f95949 | 417 | |
af647dc7 | 418 | -- Set subprogram. If this is an inherited operation that was |
419 | -- overridden, the body that is being called is its alias. | |
420 | ||
421 | Subp := Entity (Name (Call_Node)); | |
ee6ba406 | 422 | |
423 | if Present (Alias (Subp)) | |
424 | and then Is_Inherited_Operation (Subp) | |
425 | and then No (DTC_Entity (Subp)) | |
426 | then | |
427 | Subp := Alias (Subp); | |
428 | end if; | |
429 | ||
7189d17f | 430 | -- Definition of the class-wide type and the tagged type |
ee6ba406 | 431 | |
7189d17f | 432 | -- If the controlling argument is itself a tag rather than a tagged |
433 | -- object, then use the class-wide type associated with the subprogram's | |
434 | -- controlling type. This case can occur when a call to an inherited | |
435 | -- primitive has an actual that originated from a default parameter | |
436 | -- given by a tag-indeterminate call and when there is no other | |
437 | -- controlling argument providing the tag (AI-239 requires dispatching). | |
438 | -- This capability of dispatching directly by tag is also needed by the | |
439 | -- implementation of AI-260 (for the generic dispatching constructors). | |
440 | ||
2ea346ac | 441 | if Ctrl_Typ = RTE (RE_Tag) |
68f95949 | 442 | or else (RTE_Available (RE_Interface_Tag) |
2ea346ac | 443 | and then Ctrl_Typ = RTE (RE_Interface_Tag)) |
aad6babd | 444 | then |
af647dc7 | 445 | CW_Typ := Class_Wide_Type (Find_Dispatching_Type (Subp)); |
7189d17f | 446 | |
725a69d2 | 447 | -- Class_Wide_Type is applied to the expressions used to initialize |
448 | -- CW_Typ, to ensure that CW_Typ always denotes a class-wide type, since | |
449 | -- there are cases where the controlling type is resolved to a specific | |
450 | -- type (such as for designated types of arguments such as CW'Access). | |
451 | ||
2ea346ac | 452 | elsif Is_Access_Type (Ctrl_Typ) then |
453 | CW_Typ := Class_Wide_Type (Designated_Type (Ctrl_Typ)); | |
7189d17f | 454 | |
ee6ba406 | 455 | else |
2ea346ac | 456 | CW_Typ := Class_Wide_Type (Ctrl_Typ); |
ee6ba406 | 457 | end if; |
458 | ||
459 | Typ := Root_Type (CW_Typ); | |
460 | ||
d62940bf | 461 | if Ekind (Typ) = E_Incomplete_Type then |
462 | Typ := Non_Limited_View (Typ); | |
463 | end if; | |
464 | ||
ee6ba406 | 465 | if not Is_Limited_Type (Typ) then |
466 | Eq_Prim_Op := Find_Prim_Op (Typ, Name_Op_Eq); | |
467 | end if; | |
468 | ||
343d35dc | 469 | -- Dispatching call to C++ primitive. Create a new parameter list |
470 | -- with no tag checks. | |
ee6ba406 | 471 | |
343d35dc | 472 | if Is_CPP_Class (Typ) then |
ee6ba406 | 473 | New_Params := New_List; |
474 | Param := First_Actual (Call_Node); | |
475 | while Present (Param) loop | |
aad6babd | 476 | Append_To (New_Params, Relocate_Node (Param)); |
ee6ba406 | 477 | Next_Actual (Param); |
478 | end loop; | |
479 | ||
343d35dc | 480 | -- Dispatching call to Ada primitive |
481 | ||
ee6ba406 | 482 | elsif Present (Param_List) then |
483 | ||
484 | -- Generate the Tag checks when appropriate | |
485 | ||
486 | New_Params := New_List; | |
ee6ba406 | 487 | Param := First_Actual (Call_Node); |
488 | while Present (Param) loop | |
489 | ||
490 | -- No tag check with itself | |
491 | ||
492 | if Param = Ctrl_Arg then | |
9dfe12ae | 493 | Append_To (New_Params, |
494 | Duplicate_Subexpr_Move_Checks (Param)); | |
ee6ba406 | 495 | |
496 | -- No tag check for parameter whose type is neither tagged nor | |
497 | -- access to tagged (for access parameters) | |
498 | ||
499 | elsif No (Find_Controlling_Arg (Param)) then | |
500 | Append_To (New_Params, Relocate_Node (Param)); | |
501 | ||
7189d17f | 502 | -- No tag check for function dispatching on result if the |
ee6ba406 | 503 | -- Tag given by the context is this one |
504 | ||
505 | elsif Find_Controlling_Arg (Param) = Ctrl_Arg then | |
506 | Append_To (New_Params, Relocate_Node (Param)); | |
507 | ||
508 | -- "=" is the only dispatching operation allowed to get | |
509 | -- operands with incompatible tags (it just returns false). | |
9dfe12ae | 510 | -- We use Duplicate_Subexpr_Move_Checks instead of calling |
511 | -- Relocate_Node because the value will be duplicated to | |
512 | -- check the tags. | |
ee6ba406 | 513 | |
514 | elsif Subp = Eq_Prim_Op then | |
9dfe12ae | 515 | Append_To (New_Params, |
516 | Duplicate_Subexpr_Move_Checks (Param)); | |
ee6ba406 | 517 | |
518 | -- No check in presence of suppress flags | |
519 | ||
520 | elsif Tag_Checks_Suppressed (Etype (Param)) | |
521 | or else (Is_Access_Type (Etype (Param)) | |
522 | and then Tag_Checks_Suppressed | |
523 | (Designated_Type (Etype (Param)))) | |
524 | then | |
525 | Append_To (New_Params, Relocate_Node (Param)); | |
526 | ||
527 | -- Optimization: no tag checks if the parameters are identical | |
528 | ||
529 | elsif Is_Entity_Name (Param) | |
530 | and then Is_Entity_Name (Ctrl_Arg) | |
531 | and then Entity (Param) = Entity (Ctrl_Arg) | |
532 | then | |
533 | Append_To (New_Params, Relocate_Node (Param)); | |
534 | ||
535 | -- Now we need to generate the Tag check | |
536 | ||
537 | else | |
538 | -- Generate code for tag equality check | |
539 | -- Perhaps should have Checks.Apply_Tag_Equality_Check??? | |
540 | ||
541 | Insert_Action (Ctrl_Arg, | |
542 | Make_Implicit_If_Statement (Call_Node, | |
543 | Condition => | |
544 | Make_Op_Ne (Loc, | |
545 | Left_Opnd => | |
546 | Make_Selected_Component (Loc, | |
547 | Prefix => New_Value (Ctrl_Arg), | |
548 | Selector_Name => | |
4660e715 | 549 | New_Reference_To |
550 | (First_Tag_Component (Typ), Loc)), | |
ee6ba406 | 551 | |
552 | Right_Opnd => | |
553 | Make_Selected_Component (Loc, | |
554 | Prefix => | |
555 | Unchecked_Convert_To (Typ, New_Value (Param)), | |
556 | Selector_Name => | |
4660e715 | 557 | New_Reference_To |
558 | (First_Tag_Component (Typ), Loc))), | |
ee6ba406 | 559 | |
560 | Then_Statements => | |
561 | New_List (New_Constraint_Error (Loc)))); | |
562 | ||
563 | Append_To (New_Params, Relocate_Node (Param)); | |
564 | end if; | |
565 | ||
566 | Next_Actual (Param); | |
567 | end loop; | |
568 | end if; | |
569 | ||
570 | -- Generate the appropriate subprogram pointer type | |
571 | ||
68f95949 | 572 | if Etype (Subp) = Typ then |
ee6ba406 | 573 | Res_Typ := CW_Typ; |
574 | else | |
7189d17f | 575 | Res_Typ := Etype (Subp); |
ee6ba406 | 576 | end if; |
577 | ||
b6b96867 | 578 | Subp_Typ := Create_Itype (E_Subprogram_Type, Call_Node); |
ee6ba406 | 579 | Subp_Ptr_Typ := Create_Itype (E_Access_Subprogram_Type, Call_Node); |
580 | Set_Etype (Subp_Typ, Res_Typ); | |
ee6ba406 | 581 | Set_Returns_By_Ref (Subp_Typ, Returns_By_Ref (Subp)); |
582 | ||
583 | -- Create a new list of parameters which is a copy of the old formal | |
584 | -- list including the creation of a new set of matching entities. | |
585 | ||
586 | declare | |
587 | Old_Formal : Entity_Id := First_Formal (Subp); | |
588 | New_Formal : Entity_Id; | |
725a69d2 | 589 | Extra : Entity_Id := Empty; |
ee6ba406 | 590 | |
591 | begin | |
592 | if Present (Old_Formal) then | |
593 | New_Formal := New_Copy (Old_Formal); | |
594 | Set_First_Entity (Subp_Typ, New_Formal); | |
595 | Param := First_Actual (Call_Node); | |
596 | ||
597 | loop | |
598 | Set_Scope (New_Formal, Subp_Typ); | |
599 | ||
600 | -- Change all the controlling argument types to be class-wide | |
7189d17f | 601 | -- to avoid a recursion in dispatching. |
ee6ba406 | 602 | |
7189d17f | 603 | if Is_Controlling_Formal (New_Formal) then |
ee6ba406 | 604 | Set_Etype (New_Formal, Etype (Param)); |
605 | end if; | |
606 | ||
cc60bd16 | 607 | -- If the type of the formal is an itype, there was code here |
608 | -- introduced in 1998 in revision 1.46, to create a new itype | |
609 | -- by copy. This seems useless, and in fact leads to semantic | |
610 | -- errors when the itype is the completion of a type derived | |
611 | -- from a private type. | |
ee6ba406 | 612 | |
613 | Extra := New_Formal; | |
614 | Next_Formal (Old_Formal); | |
615 | exit when No (Old_Formal); | |
616 | ||
617 | Set_Next_Entity (New_Formal, New_Copy (Old_Formal)); | |
618 | Next_Entity (New_Formal); | |
619 | Next_Actual (Param); | |
620 | end loop; | |
af647dc7 | 621 | |
622 | Set_Next_Entity (New_Formal, Empty); | |
ee6ba406 | 623 | Set_Last_Entity (Subp_Typ, Extra); |
725a69d2 | 624 | end if; |
ee6ba406 | 625 | |
725a69d2 | 626 | -- Now that the explicit formals have been duplicated, any extra |
627 | -- formals needed by the subprogram must be created. | |
ee6ba406 | 628 | |
725a69d2 | 629 | if Present (Extra) then |
630 | Set_Extra_Formal (Extra, Empty); | |
ee6ba406 | 631 | end if; |
725a69d2 | 632 | |
633 | Create_Extra_Formals (Subp_Typ); | |
ee6ba406 | 634 | end; |
635 | ||
b6b96867 | 636 | -- Complete description of pointer type, including size information, as |
637 | -- must be done with itypes to prevent order-of-elaboration anomalies | |
638 | -- in gigi. | |
639 | ||
ee6ba406 | 640 | Set_Etype (Subp_Ptr_Typ, Subp_Ptr_Typ); |
641 | Set_Directly_Designated_Type (Subp_Ptr_Typ, Subp_Typ); | |
acf97c11 | 642 | Set_Convention (Subp_Ptr_Typ, Convention (Subp_Typ)); |
b6b96867 | 643 | Layout_Type (Subp_Ptr_Typ); |
ee6ba406 | 644 | |
68f95949 | 645 | -- If the controlling argument is a value of type Ada.Tag or an abstract |
646 | -- interface class-wide type then use it directly. Otherwise, the tag | |
647 | -- must be extracted from the controlling object. | |
7189d17f | 648 | |
2ea346ac | 649 | if Ctrl_Typ = RTE (RE_Tag) |
68f95949 | 650 | or else (RTE_Available (RE_Interface_Tag) |
2ea346ac | 651 | and then Ctrl_Typ = RTE (RE_Interface_Tag)) |
68f95949 | 652 | then |
653 | Controlling_Tag := Duplicate_Subexpr (Ctrl_Arg); | |
654 | ||
343d35dc | 655 | -- Extract the tag from an unchecked type conversion. Done to avoid |
656 | -- the expansion of additional code just to obtain the value of such | |
657 | -- tag because the current management of interface type conversions | |
658 | -- generates in some cases this unchecked type conversion with the | |
659 | -- tag of the object (see Expand_Interface_Conversion). | |
660 | ||
661 | elsif Nkind (Ctrl_Arg) = N_Unchecked_Type_Conversion | |
662 | and then | |
663 | (Etype (Expression (Ctrl_Arg)) = RTE (RE_Tag) | |
664 | or else | |
665 | (RTE_Available (RE_Interface_Tag) | |
666 | and then | |
667 | Etype (Expression (Ctrl_Arg)) = RTE (RE_Interface_Tag))) | |
668 | then | |
669 | Controlling_Tag := Duplicate_Subexpr (Expression (Ctrl_Arg)); | |
670 | ||
68f95949 | 671 | -- Ada 2005 (AI-251): Abstract interface class-wide type |
672 | ||
2ea346ac | 673 | elsif Is_Interface (Ctrl_Typ) |
674 | and then Is_Class_Wide_Type (Ctrl_Typ) | |
aad6babd | 675 | then |
7189d17f | 676 | Controlling_Tag := Duplicate_Subexpr (Ctrl_Arg); |
677 | ||
678 | else | |
679 | Controlling_Tag := | |
680 | Make_Selected_Component (Loc, | |
681 | Prefix => Duplicate_Subexpr_Move_Checks (Ctrl_Arg), | |
682 | Selector_Name => New_Reference_To (DTC_Entity (Subp), Loc)); | |
683 | end if; | |
684 | ||
343d35dc | 685 | -- Handle dispatching calls to predefined primitives |
ee6ba406 | 686 | |
af647dc7 | 687 | if Is_Predefined_Dispatching_Operation (Subp) |
688 | or else Is_Predefined_Dispatching_Alias (Subp) | |
689 | then | |
68f95949 | 690 | New_Call_Name := |
691 | Unchecked_Convert_To (Subp_Ptr_Typ, | |
343d35dc | 692 | Build_Get_Predefined_Prim_Op_Address (Loc, |
693 | Tag_Node => Controlling_Tag, | |
725a69d2 | 694 | Position => DT_Position (Subp))); |
ee6ba406 | 695 | |
343d35dc | 696 | -- Handle dispatching calls to user-defined primitives |
68f95949 | 697 | |
698 | else | |
699 | New_Call_Name := | |
700 | Unchecked_Convert_To (Subp_Ptr_Typ, | |
343d35dc | 701 | Build_Get_Prim_Op_Address (Loc, |
725a69d2 | 702 | Typ => Find_Dispatching_Type (Subp), |
703 | Tag_Node => Controlling_Tag, | |
704 | Position => DT_Position (Subp))); | |
68f95949 | 705 | end if; |
ee6ba406 | 706 | |
707 | if Nkind (Call_Node) = N_Function_Call then | |
ee6ba406 | 708 | |
725a69d2 | 709 | New_Call := |
710 | Make_Function_Call (Loc, | |
711 | Name => New_Call_Name, | |
712 | Parameter_Associations => New_Params); | |
ee6ba406 | 713 | |
725a69d2 | 714 | -- If this is a dispatching "=", we must first compare the tags so |
715 | -- we generate: x.tag = y.tag and then x = y | |
ee6ba406 | 716 | |
725a69d2 | 717 | if Subp = Eq_Prim_Op then |
718 | Param := First_Actual (Call_Node); | |
aad6babd | 719 | New_Call := |
725a69d2 | 720 | Make_And_Then (Loc, |
721 | Left_Opnd => | |
722 | Make_Op_Eq (Loc, | |
723 | Left_Opnd => | |
724 | Make_Selected_Component (Loc, | |
725 | Prefix => New_Value (Param), | |
726 | Selector_Name => | |
727 | New_Reference_To (First_Tag_Component (Typ), | |
728 | Loc)), | |
ee6ba406 | 729 | |
725a69d2 | 730 | Right_Opnd => |
731 | Make_Selected_Component (Loc, | |
732 | Prefix => | |
733 | Unchecked_Convert_To (Typ, | |
734 | New_Value (Next_Actual (Param))), | |
735 | Selector_Name => | |
736 | New_Reference_To (First_Tag_Component (Typ), | |
737 | Loc))), | |
738 | Right_Opnd => New_Call); | |
ee6ba406 | 739 | end if; |
740 | ||
741 | else | |
742 | New_Call := | |
743 | Make_Procedure_Call_Statement (Loc, | |
744 | Name => New_Call_Name, | |
745 | Parameter_Associations => New_Params); | |
746 | end if; | |
747 | ||
748 | Rewrite (Call_Node, New_Call); | |
725a69d2 | 749 | |
750 | -- Suppress all checks during the analysis of the expanded code | |
36b938a3 | 751 | -- to avoid the generation of spurious warnings under ZFP run-time. |
725a69d2 | 752 | |
753 | Analyze_And_Resolve (Call_Node, Call_Typ, Suppress => All_Checks); | |
7189d17f | 754 | end Expand_Dispatching_Call; |
ee6ba406 | 755 | |
aad6babd | 756 | --------------------------------- |
757 | -- Expand_Interface_Conversion -- | |
758 | --------------------------------- | |
759 | ||
952af0b9 | 760 | procedure Expand_Interface_Conversion |
761 | (N : Node_Id; | |
762 | Is_Static : Boolean := True) | |
763 | is | |
aad6babd | 764 | Loc : constant Source_Ptr := Sloc (N); |
af647dc7 | 765 | Etyp : constant Entity_Id := Etype (N); |
aad6babd | 766 | Operand : constant Node_Id := Expression (N); |
767 | Operand_Typ : Entity_Id := Etype (Operand); | |
d62940bf | 768 | Func : Node_Id; |
af647dc7 | 769 | Iface_Typ : Entity_Id := Etype (N); |
770 | Iface_Tag : Entity_Id; | |
aad6babd | 771 | |
772 | begin | |
343d35dc | 773 | -- Ada 2005 (AI-345): Handle synchronized interface type derivations |
aad6babd | 774 | |
343d35dc | 775 | if Is_Concurrent_Type (Operand_Typ) then |
776 | Operand_Typ := Base_Type (Corresponding_Record_Type (Operand_Typ)); | |
aad6babd | 777 | end if; |
778 | ||
e7e688dd | 779 | -- Handle access to class-wide interface types |
aad6babd | 780 | |
d62940bf | 781 | if Is_Access_Type (Iface_Typ) then |
782 | Iface_Typ := Etype (Directly_Designated_Type (Iface_Typ)); | |
aad6babd | 783 | end if; |
784 | ||
d62940bf | 785 | -- Handle class-wide interface types. This conversion can appear |
786 | -- explicitly in the source code. Example: I'Class (Obj) | |
aad6babd | 787 | |
d62940bf | 788 | if Is_Class_Wide_Type (Iface_Typ) then |
725a69d2 | 789 | Iface_Typ := Root_Type (Iface_Typ); |
d62940bf | 790 | end if; |
791 | ||
79a72728 | 792 | -- If the target type is a tagged synchronized type, the dispatch table |
bf3e1520 | 793 | -- info is in the corresponding record type. |
79a72728 | 794 | |
795 | if Is_Concurrent_Type (Iface_Typ) then | |
796 | Iface_Typ := Corresponding_Record_Type (Iface_Typ); | |
797 | end if; | |
798 | ||
a17cc77d | 799 | -- Freeze the entity associated with the target interface to have |
800 | -- available the attribute Access_Disp_Table. | |
801 | ||
802 | Freeze_Before (N, Iface_Typ); | |
803 | ||
af647dc7 | 804 | pragma Assert (not Is_Static |
805 | or else (not Is_Class_Wide_Type (Iface_Typ) | |
806 | and then Is_Interface (Iface_Typ))); | |
aad6babd | 807 | |
662256db | 808 | if not Tagged_Type_Expansion then |
725a69d2 | 809 | |
810 | -- For VM, just do a conversion ??? | |
811 | ||
812 | Rewrite (N, Unchecked_Convert_To (Etype (N), N)); | |
813 | Analyze (N); | |
814 | return; | |
815 | end if; | |
816 | ||
952af0b9 | 817 | if not Is_Static then |
68f95949 | 818 | |
819 | -- Give error if configurable run time and Displace not available | |
820 | ||
821 | if not RTE_Available (RE_Displace) then | |
cc60bd16 | 822 | Error_Msg_CRT ("dynamic interface conversion", N); |
68f95949 | 823 | return; |
824 | end if; | |
825 | ||
725a69d2 | 826 | -- Handle conversion of access-to-class-wide interface types. Target |
827 | -- can be an access to an object or an access to another class-wide | |
828 | -- interface (see -1- and -2- in the following example): | |
af647dc7 | 829 | |
830 | -- type Iface1_Ref is access all Iface1'Class; | |
831 | -- type Iface2_Ref is access all Iface1'Class; | |
832 | ||
833 | -- Acc1 : Iface1_Ref := new ... | |
834 | -- Obj : Obj_Ref := Obj_Ref (Acc); -- 1 | |
835 | -- Acc2 : Iface2_Ref := Iface2_Ref (Acc); -- 2 | |
836 | ||
837 | if Is_Access_Type (Operand_Typ) then | |
af647dc7 | 838 | Rewrite (N, |
839 | Unchecked_Convert_To (Etype (N), | |
840 | Make_Function_Call (Loc, | |
841 | Name => New_Reference_To (RTE (RE_Displace), Loc), | |
842 | Parameter_Associations => New_List ( | |
843 | ||
844 | Unchecked_Convert_To (RTE (RE_Address), | |
845 | Relocate_Node (Expression (N))), | |
846 | ||
847 | New_Occurrence_Of | |
848 | (Node (First_Elmt (Access_Disp_Table (Iface_Typ))), | |
849 | Loc))))); | |
850 | ||
851 | Analyze (N); | |
852 | return; | |
853 | end if; | |
854 | ||
952af0b9 | 855 | Rewrite (N, |
856 | Make_Function_Call (Loc, | |
857 | Name => New_Reference_To (RTE (RE_Displace), Loc), | |
858 | Parameter_Associations => New_List ( | |
859 | Make_Attribute_Reference (Loc, | |
860 | Prefix => Relocate_Node (Expression (N)), | |
861 | Attribute_Name => Name_Address), | |
af647dc7 | 862 | |
952af0b9 | 863 | New_Occurrence_Of |
864 | (Node (First_Elmt (Access_Disp_Table (Iface_Typ))), | |
865 | Loc)))); | |
866 | ||
867 | Analyze (N); | |
868 | ||
af647dc7 | 869 | -- If the target is a class-wide interface we change the type of the |
870 | -- data returned by IW_Convert to indicate that this is a dispatching | |
871 | -- call. | |
952af0b9 | 872 | |
17e14451 | 873 | declare |
874 | New_Itype : Entity_Id; | |
952af0b9 | 875 | |
17e14451 | 876 | begin |
877 | New_Itype := Create_Itype (E_Anonymous_Access_Type, N); | |
cc60bd16 | 878 | Set_Etype (New_Itype, New_Itype); |
17e14451 | 879 | Set_Directly_Designated_Type (New_Itype, Etyp); |
952af0b9 | 880 | |
17e14451 | 881 | Rewrite (N, |
882 | Make_Explicit_Dereference (Loc, | |
883 | Prefix => | |
884 | Unchecked_Convert_To (New_Itype, Relocate_Node (N)))); | |
885 | Analyze (N); | |
886 | Freeze_Itype (New_Itype, N); | |
887 | ||
888 | return; | |
889 | end; | |
952af0b9 | 890 | end if; |
891 | ||
d62940bf | 892 | Iface_Tag := Find_Interface_Tag (Operand_Typ, Iface_Typ); |
aad6babd | 893 | pragma Assert (Iface_Tag /= Empty); |
894 | ||
d62940bf | 895 | -- Keep separate access types to interfaces because one internal |
896 | -- function is used to handle the null value (see following comment) | |
897 | ||
898 | if not Is_Access_Type (Etype (N)) then | |
899 | Rewrite (N, | |
900 | Unchecked_Convert_To (Etype (N), | |
901 | Make_Selected_Component (Loc, | |
902 | Prefix => Relocate_Node (Expression (N)), | |
903 | Selector_Name => | |
904 | New_Occurrence_Of (Iface_Tag, Loc)))); | |
905 | ||
906 | else | |
907 | -- Build internal function to handle the case in which the | |
908 | -- actual is null. If the actual is null returns null because | |
909 | -- no displacement is required; otherwise performs a type | |
910 | -- conversion that will be expanded in the code that returns | |
911 | -- the value of the displaced actual. That is: | |
912 | ||
af647dc7 | 913 | -- function Func (O : Address) return Iface_Typ is |
17e14451 | 914 | -- type Op_Typ is access all Operand_Typ; |
915 | -- Aux : Op_Typ := To_Op_Typ (O); | |
d62940bf | 916 | -- begin |
af647dc7 | 917 | -- if O = Null_Address then |
d62940bf | 918 | -- return null; |
919 | -- else | |
17e14451 | 920 | -- return Iface_Typ!(Aux.Iface_Tag'Address); |
d62940bf | 921 | -- end if; |
922 | -- end Func; | |
923 | ||
af647dc7 | 924 | declare |
17e14451 | 925 | Desig_Typ : Entity_Id; |
926 | Fent : Entity_Id; | |
927 | New_Typ_Decl : Node_Id; | |
17e14451 | 928 | Stats : List_Id; |
929 | ||
af647dc7 | 930 | begin |
931 | Desig_Typ := Etype (Expression (N)); | |
d62940bf | 932 | |
af647dc7 | 933 | if Is_Access_Type (Desig_Typ) then |
865909d3 | 934 | Desig_Typ := |
935 | Available_View (Directly_Designated_Type (Desig_Typ)); | |
af647dc7 | 936 | end if; |
d62940bf | 937 | |
e7e688dd | 938 | if Is_Concurrent_Type (Desig_Typ) then |
939 | Desig_Typ := Base_Type (Corresponding_Record_Type (Desig_Typ)); | |
940 | end if; | |
941 | ||
17e14451 | 942 | New_Typ_Decl := |
943 | Make_Full_Type_Declaration (Loc, | |
944 | Defining_Identifier => | |
945 | Make_Defining_Identifier (Loc, New_Internal_Name ('T')), | |
946 | Type_Definition => | |
947 | Make_Access_To_Object_Definition (Loc, | |
948 | All_Present => True, | |
949 | Null_Exclusion_Present => False, | |
950 | Constant_Present => False, | |
951 | Subtype_Indication => | |
952 | New_Reference_To (Desig_Typ, Loc))); | |
d62940bf | 953 | |
725a69d2 | 954 | Stats := New_List ( |
17e14451 | 955 | Make_Simple_Return_Statement (Loc, |
956 | Unchecked_Convert_To (Etype (N), | |
957 | Make_Attribute_Reference (Loc, | |
958 | Prefix => | |
959 | Make_Selected_Component (Loc, | |
960 | Prefix => | |
e7e688dd | 961 | Unchecked_Convert_To |
962 | (Defining_Identifier (New_Typ_Decl), | |
963 | Make_Identifier (Loc, Name_uO)), | |
17e14451 | 964 | Selector_Name => |
965 | New_Occurrence_Of (Iface_Tag, Loc)), | |
966 | Attribute_Name => Name_Address)))); | |
725a69d2 | 967 | |
17e14451 | 968 | -- If the type is null-excluding, no need for the null branch. |
969 | -- Otherwise we need to check for it and return null. | |
970 | ||
971 | if not Can_Never_Be_Null (Etype (N)) then | |
972 | Stats := New_List ( | |
973 | Make_If_Statement (Loc, | |
974 | Condition => | |
975 | Make_Op_Eq (Loc, | |
976 | Left_Opnd => Make_Identifier (Loc, Name_uO), | |
977 | Right_Opnd => New_Reference_To | |
978 | (RTE (RE_Null_Address), Loc)), | |
979 | ||
980 | Then_Statements => New_List ( | |
981 | Make_Simple_Return_Statement (Loc, | |
982 | Make_Null (Loc))), | |
983 | Else_Statements => Stats)); | |
984 | end if; | |
d62940bf | 985 | |
17e14451 | 986 | Fent := |
987 | Make_Defining_Identifier (Loc, | |
988 | New_Internal_Name ('F')); | |
af647dc7 | 989 | |
17e14451 | 990 | Func := |
991 | Make_Subprogram_Body (Loc, | |
992 | Specification => | |
993 | Make_Function_Specification (Loc, | |
994 | Defining_Unit_Name => Fent, | |
d62940bf | 995 | |
17e14451 | 996 | Parameter_Specifications => New_List ( |
997 | Make_Parameter_Specification (Loc, | |
998 | Defining_Identifier => | |
999 | Make_Defining_Identifier (Loc, Name_uO), | |
1000 | Parameter_Type => | |
1001 | New_Reference_To (RTE (RE_Address), Loc))), | |
d62940bf | 1002 | |
17e14451 | 1003 | Result_Definition => |
1004 | New_Reference_To (Etype (N), Loc)), | |
d62940bf | 1005 | |
e7e688dd | 1006 | Declarations => New_List (New_Typ_Decl), |
d62940bf | 1007 | |
17e14451 | 1008 | Handled_Statement_Sequence => |
1009 | Make_Handled_Sequence_Of_Statements (Loc, Stats)); | |
d62940bf | 1010 | |
17e14451 | 1011 | -- Place function body before the expression containing the |
1012 | -- conversion. We suppress all checks because the body of the | |
1013 | -- internally generated function already takes care of the case | |
1014 | -- in which the actual is null; therefore there is no need to | |
1015 | -- double check that the pointer is not null when the program | |
1016 | -- executes the alternative that performs the type conversion). | |
af647dc7 | 1017 | |
17e14451 | 1018 | Insert_Action (N, Func, Suppress => All_Checks); |
af647dc7 | 1019 | |
17e14451 | 1020 | if Is_Access_Type (Etype (Expression (N))) then |
af647dc7 | 1021 | |
e7e688dd | 1022 | -- Generate: Func (Address!(Expression)) |
af647dc7 | 1023 | |
17e14451 | 1024 | Rewrite (N, |
1025 | Make_Function_Call (Loc, | |
1026 | Name => New_Reference_To (Fent, Loc), | |
1027 | Parameter_Associations => New_List ( | |
e7e688dd | 1028 | Unchecked_Convert_To (RTE (RE_Address), |
1029 | Relocate_Node (Expression (N)))))); | |
17e14451 | 1030 | |
1031 | else | |
e7e688dd | 1032 | -- Generate: Func (Operand_Typ!(Expression)'Address) |
17e14451 | 1033 | |
1034 | Rewrite (N, | |
1035 | Make_Function_Call (Loc, | |
1036 | Name => New_Reference_To (Fent, Loc), | |
1037 | Parameter_Associations => New_List ( | |
1038 | Make_Attribute_Reference (Loc, | |
1039 | Prefix => Unchecked_Convert_To (Operand_Typ, | |
1040 | Relocate_Node (Expression (N))), | |
1041 | Attribute_Name => Name_Address)))); | |
1042 | end if; | |
1043 | end; | |
d62940bf | 1044 | end if; |
aad6babd | 1045 | |
1046 | Analyze (N); | |
1047 | end Expand_Interface_Conversion; | |
1048 | ||
1049 | ------------------------------ | |
1050 | -- Expand_Interface_Actuals -- | |
1051 | ------------------------------ | |
1052 | ||
1053 | procedure Expand_Interface_Actuals (Call_Node : Node_Id) is | |
aad6babd | 1054 | Actual : Node_Id; |
d62940bf | 1055 | Actual_Dup : Node_Id; |
aad6babd | 1056 | Actual_Typ : Entity_Id; |
d62940bf | 1057 | Anon : Entity_Id; |
aad6babd | 1058 | Conversion : Node_Id; |
1059 | Formal : Entity_Id; | |
1060 | Formal_Typ : Entity_Id; | |
1061 | Subp : Entity_Id; | |
d62940bf | 1062 | Formal_DDT : Entity_Id; |
1063 | Actual_DDT : Entity_Id; | |
aad6babd | 1064 | |
1065 | begin | |
1066 | -- This subprogram is called directly from the semantics, so we need a | |
1067 | -- check to see whether expansion is active before proceeding. | |
1068 | ||
1069 | if not Expander_Active then | |
1070 | return; | |
1071 | end if; | |
1072 | ||
1073 | -- Call using access to subprogram with explicit dereference | |
1074 | ||
1075 | if Nkind (Name (Call_Node)) = N_Explicit_Dereference then | |
1076 | Subp := Etype (Name (Call_Node)); | |
1077 | ||
4e5db562 | 1078 | -- Call using selected component |
1079 | ||
1080 | elsif Nkind (Name (Call_Node)) = N_Selected_Component then | |
1081 | Subp := Entity (Selector_Name (Name (Call_Node))); | |
1082 | ||
1083 | -- Call using direct name | |
aad6babd | 1084 | |
1085 | else | |
1086 | Subp := Entity (Name (Call_Node)); | |
1087 | end if; | |
1088 | ||
725a69d2 | 1089 | -- Ada 2005 (AI-251): Look for interface type formals to force "this" |
1090 | -- displacement | |
1091 | ||
aad6babd | 1092 | Formal := First_Formal (Subp); |
1093 | Actual := First_Actual (Call_Node); | |
aad6babd | 1094 | while Present (Formal) loop |
725a69d2 | 1095 | Formal_Typ := Etype (Formal); |
d62940bf | 1096 | |
1097 | if Ekind (Formal_Typ) = E_Record_Type_With_Private then | |
1098 | Formal_Typ := Full_View (Formal_Typ); | |
1099 | end if; | |
1100 | ||
1101 | if Is_Access_Type (Formal_Typ) then | |
1102 | Formal_DDT := Directly_Designated_Type (Formal_Typ); | |
1103 | end if; | |
1104 | ||
aad6babd | 1105 | Actual_Typ := Etype (Actual); |
1106 | ||
d62940bf | 1107 | if Is_Access_Type (Actual_Typ) then |
1108 | Actual_DDT := Directly_Designated_Type (Actual_Typ); | |
1109 | end if; | |
1110 | ||
725a69d2 | 1111 | if Is_Interface (Formal_Typ) |
1112 | and then Is_Class_Wide_Type (Formal_Typ) | |
1113 | then | |
d62940bf | 1114 | -- No need to displace the pointer if the type of the actual |
725a69d2 | 1115 | -- coindices with the type of the formal. |
aad6babd | 1116 | |
725a69d2 | 1117 | if Actual_Typ = Formal_Typ then |
d62940bf | 1118 | null; |
1119 | ||
725a69d2 | 1120 | -- No need to displace the pointer if the interface type is |
1121 | -- a parent of the type of the actual because in this case the | |
1122 | -- interface primitives are located in the primary dispatch table. | |
aad6babd | 1123 | |
a652dd51 | 1124 | elsif Is_Ancestor (Formal_Typ, Actual_Typ) then |
d62940bf | 1125 | null; |
1126 | ||
725a69d2 | 1127 | -- Implicit conversion to the class-wide formal type to force |
1128 | -- the displacement of the pointer. | |
1129 | ||
d62940bf | 1130 | else |
1131 | Conversion := Convert_To (Formal_Typ, Relocate_Node (Actual)); | |
725a69d2 | 1132 | Rewrite (Actual, Conversion); |
d62940bf | 1133 | Analyze_And_Resolve (Actual, Formal_Typ); |
1134 | end if; | |
aad6babd | 1135 | |
725a69d2 | 1136 | -- Access to class-wide interface type |
aad6babd | 1137 | |
1138 | elsif Is_Access_Type (Formal_Typ) | |
725a69d2 | 1139 | and then Is_Interface (Formal_DDT) |
1140 | and then Is_Class_Wide_Type (Formal_DDT) | |
aad6babd | 1141 | and then Interface_Present_In_Ancestor |
d62940bf | 1142 | (Typ => Actual_DDT, |
1143 | Iface => Etype (Formal_DDT)) | |
aad6babd | 1144 | then |
725a69d2 | 1145 | -- Handle attributes 'Access and 'Unchecked_Access |
1146 | ||
aad6babd | 1147 | if Nkind (Actual) = N_Attribute_Reference |
1148 | and then | |
1149 | (Attribute_Name (Actual) = Name_Access | |
1150 | or else Attribute_Name (Actual) = Name_Unchecked_Access) | |
1151 | then | |
5e82d8fe | 1152 | -- This case must have been handled by the analysis and |
1153 | -- expansion of 'Access. The only exception is when types | |
1154 | -- match and no further expansion is required. | |
aad6babd | 1155 | |
5e82d8fe | 1156 | pragma Assert (Base_Type (Etype (Prefix (Actual))) |
1157 | = Base_Type (Formal_DDT)); | |
1158 | null; | |
aad6babd | 1159 | |
725a69d2 | 1160 | -- No need to displace the pointer if the type of the actual |
1161 | -- coincides with the type of the formal. | |
d62940bf | 1162 | |
725a69d2 | 1163 | elsif Actual_DDT = Formal_DDT then |
d62940bf | 1164 | null; |
1165 | ||
725a69d2 | 1166 | -- No need to displace the pointer if the interface type is |
1167 | -- a parent of the type of the actual because in this case the | |
1168 | -- interface primitives are located in the primary dispatch table. | |
d62940bf | 1169 | |
a652dd51 | 1170 | elsif Is_Ancestor (Formal_DDT, Actual_DDT) then |
d62940bf | 1171 | null; |
1172 | ||
aad6babd | 1173 | else |
d62940bf | 1174 | Actual_Dup := Relocate_Node (Actual); |
1175 | ||
1176 | if From_With_Type (Actual_Typ) then | |
1177 | ||
1178 | -- If the type of the actual parameter comes from a limited | |
1179 | -- with-clause and the non-limited view is already available | |
9ced80be | 1180 | -- we replace the anonymous access type by a duplicate |
1181 | -- declaration whose designated type is the non-limited view | |
d62940bf | 1182 | |
1183 | if Ekind (Actual_DDT) = E_Incomplete_Type | |
1184 | and then Present (Non_Limited_View (Actual_DDT)) | |
1185 | then | |
1186 | Anon := New_Copy (Actual_Typ); | |
1187 | ||
1188 | if Is_Itype (Anon) then | |
1189 | Set_Scope (Anon, Current_Scope); | |
1190 | end if; | |
1191 | ||
1192 | Set_Directly_Designated_Type (Anon, | |
1193 | Non_Limited_View (Actual_DDT)); | |
1194 | Set_Etype (Actual_Dup, Anon); | |
1195 | ||
1196 | elsif Is_Class_Wide_Type (Actual_DDT) | |
1197 | and then Ekind (Etype (Actual_DDT)) = E_Incomplete_Type | |
1198 | and then Present (Non_Limited_View (Etype (Actual_DDT))) | |
1199 | then | |
1200 | Anon := New_Copy (Actual_Typ); | |
1201 | ||
1202 | if Is_Itype (Anon) then | |
1203 | Set_Scope (Anon, Current_Scope); | |
1204 | end if; | |
1205 | ||
1206 | Set_Directly_Designated_Type (Anon, | |
1207 | New_Copy (Actual_DDT)); | |
1208 | Set_Class_Wide_Type (Directly_Designated_Type (Anon), | |
1209 | New_Copy (Class_Wide_Type (Actual_DDT))); | |
1210 | Set_Etype (Directly_Designated_Type (Anon), | |
1211 | Non_Limited_View (Etype (Actual_DDT))); | |
1212 | Set_Etype ( | |
1213 | Class_Wide_Type (Directly_Designated_Type (Anon)), | |
1214 | Non_Limited_View (Etype (Actual_DDT))); | |
1215 | Set_Etype (Actual_Dup, Anon); | |
1216 | end if; | |
1217 | end if; | |
1218 | ||
1219 | Conversion := Convert_To (Formal_Typ, Actual_Dup); | |
1220 | Rewrite (Actual, Conversion); | |
aad6babd | 1221 | Analyze_And_Resolve (Actual, Formal_Typ); |
1222 | end if; | |
1223 | end if; | |
1224 | ||
1225 | Next_Actual (Actual); | |
1226 | Next_Formal (Formal); | |
1227 | end loop; | |
1228 | end Expand_Interface_Actuals; | |
1229 | ||
1230 | ---------------------------- | |
1231 | -- Expand_Interface_Thunk -- | |
1232 | ---------------------------- | |
1233 | ||
725a69d2 | 1234 | procedure Expand_Interface_Thunk |
17e14451 | 1235 | (Prim : Node_Id; |
1236 | Thunk_Id : out Entity_Id; | |
1237 | Thunk_Code : out Node_Id) | |
aad6babd | 1238 | is |
17e14451 | 1239 | Loc : constant Source_Ptr := Sloc (Prim); |
725a69d2 | 1240 | Actuals : constant List_Id := New_List; |
1241 | Decl : constant List_Id := New_List; | |
1242 | Formals : constant List_Id := New_List; | |
1243 | ||
1244 | Controlling_Typ : Entity_Id; | |
1245 | Decl_1 : Node_Id; | |
1246 | Decl_2 : Node_Id; | |
1247 | Formal : Node_Id; | |
cc60bd16 | 1248 | New_Arg : Node_Id; |
1249 | Offset_To_Top : Node_Id; | |
725a69d2 | 1250 | Target : Entity_Id; |
1251 | Target_Formal : Entity_Id; | |
aad6babd | 1252 | |
1253 | begin | |
725a69d2 | 1254 | Thunk_Id := Empty; |
1255 | Thunk_Code := Empty; | |
1256 | ||
aad6babd | 1257 | -- Traverse the list of alias to find the final target |
1258 | ||
17e14451 | 1259 | Target := Prim; |
aad6babd | 1260 | while Present (Alias (Target)) loop |
1261 | Target := Alias (Target); | |
1262 | end loop; | |
1263 | ||
725a69d2 | 1264 | -- In case of primitives that are functions without formals and |
1265 | -- a controlling result there is no need to build the thunk. | |
1266 | ||
1267 | if not Present (First_Formal (Target)) then | |
1268 | pragma Assert (Ekind (Target) = E_Function | |
1269 | and then Has_Controlling_Result (Target)); | |
1270 | return; | |
1271 | end if; | |
1272 | ||
aad6babd | 1273 | -- Duplicate the formals |
1274 | ||
d62940bf | 1275 | Formal := First_Formal (Target); |
aad6babd | 1276 | while Present (Formal) loop |
725a69d2 | 1277 | Append_To (Formals, |
1278 | Make_Parameter_Specification (Loc, | |
1279 | Defining_Identifier => | |
1280 | Make_Defining_Identifier (Sloc (Formal), | |
1281 | Chars => Chars (Formal)), | |
1282 | In_Present => In_Present (Parent (Formal)), | |
1283 | Out_Present => Out_Present (Parent (Formal)), | |
1284 | Parameter_Type => | |
1285 | New_Reference_To (Etype (Formal), Loc), | |
1286 | Expression => New_Copy_Tree (Expression (Parent (Formal))))); | |
d62940bf | 1287 | |
aad6babd | 1288 | Next_Formal (Formal); |
1289 | end loop; | |
1290 | ||
17e14451 | 1291 | Controlling_Typ := Find_Dispatching_Type (Target); |
aad6babd | 1292 | |
725a69d2 | 1293 | Target_Formal := First_Formal (Target); |
1294 | Formal := First (Formals); | |
1295 | while Present (Formal) loop | |
1296 | if Ekind (Target_Formal) = E_In_Parameter | |
1297 | and then Ekind (Etype (Target_Formal)) = E_Anonymous_Access_Type | |
1298 | and then Directly_Designated_Type (Etype (Target_Formal)) | |
1299 | = Controlling_Typ | |
1300 | then | |
1301 | -- Generate: | |
aad6babd | 1302 | |
17e14451 | 1303 | -- type T is access all <<type of the target formal>> |
1304 | -- S : Storage_Offset := Storage_Offset!(Formal) | |
1305 | -- - Offset_To_Top (address!(Formal)) | |
725a69d2 | 1306 | |
1307 | Decl_2 := | |
1308 | Make_Full_Type_Declaration (Loc, | |
1309 | Defining_Identifier => | |
1310 | Make_Defining_Identifier (Loc, | |
1311 | New_Internal_Name ('T')), | |
1312 | Type_Definition => | |
1313 | Make_Access_To_Object_Definition (Loc, | |
1314 | All_Present => True, | |
1315 | Null_Exclusion_Present => False, | |
1316 | Constant_Present => False, | |
1317 | Subtype_Indication => | |
aad6babd | 1318 | New_Reference_To |
725a69d2 | 1319 | (Directly_Designated_Type |
1320 | (Etype (Target_Formal)), Loc))); | |
1321 | ||
cc60bd16 | 1322 | New_Arg := |
1323 | Unchecked_Convert_To (RTE (RE_Address), | |
1324 | New_Reference_To (Defining_Identifier (Formal), Loc)); | |
1325 | ||
1326 | if not RTE_Available (RE_Offset_To_Top) then | |
1327 | Offset_To_Top := | |
1328 | Build_Offset_To_Top (Loc, New_Arg); | |
1329 | else | |
1330 | Offset_To_Top := | |
1331 | Make_Function_Call (Loc, | |
1332 | Name => New_Reference_To (RTE (RE_Offset_To_Top), Loc), | |
1333 | Parameter_Associations => New_List (New_Arg)); | |
1334 | end if; | |
1335 | ||
725a69d2 | 1336 | Decl_1 := |
1337 | Make_Object_Declaration (Loc, | |
1338 | Defining_Identifier => | |
1339 | Make_Defining_Identifier (Loc, | |
1340 | New_Internal_Name ('S')), | |
1341 | Constant_Present => True, | |
1342 | Object_Definition => | |
1343 | New_Reference_To (RTE (RE_Storage_Offset), Loc), | |
1344 | Expression => | |
1345 | Make_Op_Subtract (Loc, | |
1346 | Left_Opnd => | |
1347 | Unchecked_Convert_To | |
1348 | (RTE (RE_Storage_Offset), | |
1349 | New_Reference_To (Defining_Identifier (Formal), Loc)), | |
1350 | Right_Opnd => | |
cc60bd16 | 1351 | Offset_To_Top)); |
725a69d2 | 1352 | |
1353 | Append_To (Decl, Decl_2); | |
1354 | Append_To (Decl, Decl_1); | |
1355 | ||
17e14451 | 1356 | -- Reference the new actual. Generate: |
1357 | -- T!(S) | |
725a69d2 | 1358 | |
1359 | Append_To (Actuals, | |
1360 | Unchecked_Convert_To | |
1361 | (Defining_Identifier (Decl_2), | |
1362 | New_Reference_To (Defining_Identifier (Decl_1), Loc))); | |
1363 | ||
1364 | elsif Etype (Target_Formal) = Controlling_Typ then | |
1365 | -- Generate: | |
aad6babd | 1366 | |
17e14451 | 1367 | -- S1 : Storage_Offset := Storage_Offset!(Formal'Address) |
1368 | -- - Offset_To_Top (Formal'Address) | |
1369 | -- S2 : Addr_Ptr := Addr_Ptr!(S1) | |
aad6babd | 1370 | |
cc60bd16 | 1371 | New_Arg := |
1372 | Make_Attribute_Reference (Loc, | |
1373 | Prefix => | |
1374 | New_Reference_To (Defining_Identifier (Formal), Loc), | |
1375 | Attribute_Name => | |
1376 | Name_Address); | |
1377 | ||
1378 | if not RTE_Available (RE_Offset_To_Top) then | |
1379 | Offset_To_Top := | |
1380 | Build_Offset_To_Top (Loc, New_Arg); | |
1381 | else | |
1382 | Offset_To_Top := | |
1383 | Make_Function_Call (Loc, | |
1384 | Name => New_Reference_To (RTE (RE_Offset_To_Top), Loc), | |
1385 | Parameter_Associations => New_List (New_Arg)); | |
1386 | end if; | |
1387 | ||
725a69d2 | 1388 | Decl_1 := |
1389 | Make_Object_Declaration (Loc, | |
1390 | Defining_Identifier => | |
1391 | Make_Defining_Identifier (Loc, New_Internal_Name ('S')), | |
1392 | Constant_Present => True, | |
1393 | Object_Definition => | |
1394 | New_Reference_To (RTE (RE_Storage_Offset), Loc), | |
1395 | Expression => | |
1396 | Make_Op_Subtract (Loc, | |
1397 | Left_Opnd => | |
1398 | Unchecked_Convert_To | |
1399 | (RTE (RE_Storage_Offset), | |
1400 | Make_Attribute_Reference (Loc, | |
1401 | Prefix => | |
1402 | New_Reference_To | |
1403 | (Defining_Identifier (Formal), Loc), | |
1404 | Attribute_Name => Name_Address)), | |
1405 | Right_Opnd => | |
cc60bd16 | 1406 | Offset_To_Top)); |
aad6babd | 1407 | |
725a69d2 | 1408 | Decl_2 := |
1409 | Make_Object_Declaration (Loc, | |
1410 | Defining_Identifier => | |
1411 | Make_Defining_Identifier (Loc, New_Internal_Name ('S')), | |
1412 | Constant_Present => True, | |
1413 | Object_Definition => New_Reference_To (RTE (RE_Addr_Ptr), Loc), | |
1414 | Expression => | |
1415 | Unchecked_Convert_To | |
1416 | (RTE (RE_Addr_Ptr), | |
1417 | New_Reference_To (Defining_Identifier (Decl_1), Loc))); | |
aad6babd | 1418 | |
725a69d2 | 1419 | Append_To (Decl, Decl_1); |
1420 | Append_To (Decl, Decl_2); | |
952af0b9 | 1421 | |
17e14451 | 1422 | -- Reference the new actual. Generate: |
1423 | -- Target_Formal (S2.all) | |
aad6babd | 1424 | |
725a69d2 | 1425 | Append_To (Actuals, |
1426 | Unchecked_Convert_To | |
17e14451 | 1427 | (Etype (Target_Formal), |
725a69d2 | 1428 | Make_Explicit_Dereference (Loc, |
1429 | New_Reference_To (Defining_Identifier (Decl_2), Loc)))); | |
aad6babd | 1430 | |
725a69d2 | 1431 | -- No special management required for this actual |
aad6babd | 1432 | |
725a69d2 | 1433 | else |
1434 | Append_To (Actuals, | |
1435 | New_Reference_To (Defining_Identifier (Formal), Loc)); | |
1436 | end if; | |
1437 | ||
1438 | Next_Formal (Target_Formal); | |
aad6babd | 1439 | Next (Formal); |
1440 | end loop; | |
1441 | ||
725a69d2 | 1442 | Thunk_Id := |
1443 | Make_Defining_Identifier (Loc, | |
1444 | Chars => New_Internal_Name ('T')); | |
1445 | ||
e7e688dd | 1446 | Set_Is_Thunk (Thunk_Id); |
1447 | ||
d62940bf | 1448 | if Ekind (Target) = E_Procedure then |
725a69d2 | 1449 | Thunk_Code := |
aad6babd | 1450 | Make_Subprogram_Body (Loc, |
1451 | Specification => | |
1452 | Make_Procedure_Specification (Loc, | |
1453 | Defining_Unit_Name => Thunk_Id, | |
1454 | Parameter_Specifications => Formals), | |
1455 | Declarations => Decl, | |
1456 | Handled_Statement_Sequence => | |
1457 | Make_Handled_Sequence_Of_Statements (Loc, | |
1458 | Statements => New_List ( | |
1459 | Make_Procedure_Call_Statement (Loc, | |
725a69d2 | 1460 | Name => New_Occurrence_Of (Target, Loc), |
1461 | Parameter_Associations => Actuals)))); | |
aad6babd | 1462 | |
d62940bf | 1463 | else pragma Assert (Ekind (Target) = E_Function); |
aad6babd | 1464 | |
725a69d2 | 1465 | Thunk_Code := |
aad6babd | 1466 | Make_Subprogram_Body (Loc, |
1467 | Specification => | |
1468 | Make_Function_Specification (Loc, | |
1469 | Defining_Unit_Name => Thunk_Id, | |
1470 | Parameter_Specifications => Formals, | |
d62940bf | 1471 | Result_Definition => |
1472 | New_Copy (Result_Definition (Parent (Target)))), | |
aad6babd | 1473 | Declarations => Decl, |
1474 | Handled_Statement_Sequence => | |
1475 | Make_Handled_Sequence_Of_Statements (Loc, | |
1476 | Statements => New_List ( | |
17e14451 | 1477 | Make_Simple_Return_Statement (Loc, |
aad6babd | 1478 | Make_Function_Call (Loc, |
1479 | Name => New_Occurrence_Of (Target, Loc), | |
1480 | Parameter_Associations => Actuals))))); | |
1481 | end if; | |
aad6babd | 1482 | end Expand_Interface_Thunk; |
1483 | ||
24971415 | 1484 | ------------ |
1485 | -- Has_DT -- | |
1486 | ------------ | |
1487 | ||
1488 | function Has_DT (Typ : Entity_Id) return Boolean is | |
1489 | begin | |
1490 | return not Is_Interface (Typ) | |
1491 | and then not Restriction_Active (No_Dispatching_Calls); | |
1492 | end Has_DT; | |
1493 | ||
a652dd51 | 1494 | ----------------------------------------- |
1495 | -- Is_Predefined_Dispatching_Operation -- | |
1496 | ----------------------------------------- | |
1497 | ||
1498 | function Is_Predefined_Dispatching_Operation | |
1499 | (E : Entity_Id) return Boolean | |
1500 | is | |
1501 | TSS_Name : TSS_Name_Type; | |
1502 | ||
1503 | begin | |
1504 | if not Is_Dispatching_Operation (E) then | |
1505 | return False; | |
1506 | end if; | |
1507 | ||
1508 | Get_Name_String (Chars (E)); | |
1509 | ||
1510 | -- Most predefined primitives have internally generated names. Equality | |
1511 | -- must be treated differently; the predefined operation is recognized | |
1512 | -- as a homogeneous binary operator that returns Boolean. | |
1513 | ||
1514 | if Name_Len > TSS_Name_Type'Last then | |
1515 | TSS_Name := TSS_Name_Type (Name_Buffer (Name_Len - TSS_Name'Length + 1 | |
1516 | .. Name_Len)); | |
1517 | if Chars (E) = Name_uSize | |
1518 | or else Chars (E) = Name_uAlignment | |
1519 | or else TSS_Name = TSS_Stream_Read | |
1520 | or else TSS_Name = TSS_Stream_Write | |
1521 | or else TSS_Name = TSS_Stream_Input | |
1522 | or else TSS_Name = TSS_Stream_Output | |
1523 | or else | |
1524 | (Chars (E) = Name_Op_Eq | |
1525 | and then Etype (First_Entity (E)) = Etype (Last_Entity (E))) | |
1526 | or else Chars (E) = Name_uAssign | |
1527 | or else TSS_Name = TSS_Deep_Adjust | |
1528 | or else TSS_Name = TSS_Deep_Finalize | |
1529 | or else Is_Predefined_Interface_Primitive (E) | |
1530 | then | |
1531 | return True; | |
1532 | end if; | |
1533 | end if; | |
1534 | ||
1535 | return False; | |
1536 | end Is_Predefined_Dispatching_Operation; | |
1537 | ||
af647dc7 | 1538 | ------------------------------------- |
1539 | -- Is_Predefined_Dispatching_Alias -- | |
1540 | ------------------------------------- | |
1541 | ||
1542 | function Is_Predefined_Dispatching_Alias (Prim : Entity_Id) return Boolean | |
1543 | is | |
1544 | E : Entity_Id; | |
1545 | ||
1546 | begin | |
1547 | if not Is_Predefined_Dispatching_Operation (Prim) | |
1548 | and then Present (Alias (Prim)) | |
1549 | then | |
1550 | E := Prim; | |
1551 | while Present (Alias (E)) loop | |
1552 | E := Alias (E); | |
1553 | end loop; | |
1554 | ||
1555 | if Is_Predefined_Dispatching_Operation (E) then | |
1556 | return True; | |
1557 | end if; | |
1558 | end if; | |
1559 | ||
1560 | return False; | |
1561 | end Is_Predefined_Dispatching_Alias; | |
1562 | ||
a652dd51 | 1563 | --------------------------------------- |
1564 | -- Is_Predefined_Interface_Primitive -- | |
1565 | --------------------------------------- | |
1566 | ||
1567 | function Is_Predefined_Interface_Primitive (E : Entity_Id) return Boolean is | |
1568 | begin | |
1569 | return Ada_Version >= Ada_05 | |
1570 | and then (Chars (E) = Name_uDisp_Asynchronous_Select or else | |
1571 | Chars (E) = Name_uDisp_Conditional_Select or else | |
1572 | Chars (E) = Name_uDisp_Get_Prim_Op_Kind or else | |
1573 | Chars (E) = Name_uDisp_Get_Task_Id or else | |
1574 | Chars (E) = Name_uDisp_Requeue or else | |
1575 | Chars (E) = Name_uDisp_Timed_Select); | |
1576 | end Is_Predefined_Interface_Primitive; | |
1577 | ||
76a1c25b | 1578 | ---------------------------------------- |
1579 | -- Make_Disp_Asynchronous_Select_Body -- | |
1580 | ---------------------------------------- | |
ee6ba406 | 1581 | |
cdb1c38f | 1582 | -- For interface types, generate: |
1583 | ||
1584 | -- procedure _Disp_Asynchronous_Select | |
1585 | -- (T : in out <Typ>; | |
1586 | -- S : Integer; | |
1587 | -- P : System.Address; | |
1588 | -- B : out System.Storage_Elements.Dummy_Communication_Block; | |
1589 | -- F : out Boolean) | |
1590 | -- is | |
1591 | -- begin | |
1592 | -- null; | |
1593 | -- end _Disp_Asynchronous_Select; | |
1594 | ||
1595 | -- For protected types, generate: | |
1596 | ||
1597 | -- procedure _Disp_Asynchronous_Select | |
1598 | -- (T : in out <Typ>; | |
1599 | -- S : Integer; | |
1600 | -- P : System.Address; | |
1601 | -- B : out System.Storage_Elements.Dummy_Communication_Block; | |
1602 | -- F : out Boolean) | |
1603 | -- is | |
1604 | -- I : Integer := | |
1605 | -- Ada.Tags.Get_Entry_Index (Ada.Tags.Tag (<Typ>VP, S)); | |
1606 | -- Bnn : System.Tasking.Protected_Objects.Operations. | |
1607 | -- Communication_Block; | |
1608 | -- begin | |
1609 | -- System.Tasking.Protected_Objects.Operations.Protected_Entry_Call | |
1610 | -- (T._object'Access, | |
1611 | -- System.Tasking.Protected_Objects.Protected_Entry_Index (I), | |
1612 | -- P, | |
1613 | -- System.Tasking.Asynchronous_Call, | |
1614 | -- Bnn); | |
1615 | -- B := System.Storage_Elements.Dummy_Communication_Block (Bnn); | |
1616 | -- end _Disp_Asynchronous_Select; | |
1617 | ||
1618 | -- For task types, generate: | |
1619 | ||
1620 | -- procedure _Disp_Asynchronous_Select | |
1621 | -- (T : in out <Typ>; | |
1622 | -- S : Integer; | |
1623 | -- P : System.Address; | |
1624 | -- B : out System.Storage_Elements.Dummy_Communication_Block; | |
1625 | -- F : out Boolean) | |
1626 | -- is | |
1627 | -- I : Integer := | |
1628 | -- Ada.Tags.Get_Entry_Index (Ada.Tags.Tag (<Typ>VP, S)); | |
1629 | -- begin | |
1630 | -- System.Tasking.Rendezvous.Task_Entry_Call | |
1631 | -- (T._task_id, | |
1632 | -- System.Tasking.Task_Entry_Index (I), | |
1633 | -- P, | |
1634 | -- System.Tasking.Asynchronous_Call, | |
1635 | -- F); | |
1636 | -- end _Disp_Asynchronous_Select; | |
1637 | ||
76a1c25b | 1638 | function Make_Disp_Asynchronous_Select_Body |
1639 | (Typ : Entity_Id) return Node_Id | |
1640 | is | |
725a69d2 | 1641 | Com_Block : Entity_Id; |
1642 | Conc_Typ : Entity_Id := Empty; | |
1643 | Decls : constant List_Id := New_List; | |
1644 | DT_Ptr : Entity_Id; | |
1645 | Loc : constant Source_Ptr := Sloc (Typ); | |
acf97c11 | 1646 | Obj_Ref : Node_Id; |
725a69d2 | 1647 | Stmts : constant List_Id := New_List; |
ee6ba406 | 1648 | |
1649 | begin | |
68f95949 | 1650 | pragma Assert (not Restriction_Active (No_Dispatching_Calls)); |
1651 | ||
952af0b9 | 1652 | -- Null body is generated for interface types |
1653 | ||
76a1c25b | 1654 | if Is_Interface (Typ) then |
1655 | return | |
1656 | Make_Subprogram_Body (Loc, | |
1657 | Specification => | |
1658 | Make_Disp_Asynchronous_Select_Spec (Typ), | |
1659 | Declarations => | |
1660 | New_List, | |
1661 | Handled_Statement_Sequence => | |
1662 | Make_Handled_Sequence_Of_Statements (Loc, | |
1663 | New_List (Make_Null_Statement (Loc)))); | |
9dfe12ae | 1664 | end if; |
1665 | ||
76a1c25b | 1666 | DT_Ptr := Node (First_Elmt (Access_Disp_Table (Typ))); |
aad6babd | 1667 | |
952af0b9 | 1668 | if Is_Concurrent_Record_Type (Typ) then |
1669 | Conc_Typ := Corresponding_Concurrent_Type (Typ); | |
aad6babd | 1670 | |
76a1c25b | 1671 | -- Generate: |
cdb1c38f | 1672 | -- I : Integer := |
1673 | -- Ada.Tags.Get_Entry_Index (Ada.Tags.Tag! (<type>VP), S); | |
aad6babd | 1674 | |
76a1c25b | 1675 | -- where I will be used to capture the entry index of the primitive |
1676 | -- wrapper at position S. | |
aad6babd | 1677 | |
76a1c25b | 1678 | Append_To (Decls, |
1679 | Make_Object_Declaration (Loc, | |
1680 | Defining_Identifier => | |
1681 | Make_Defining_Identifier (Loc, Name_uI), | |
1682 | Object_Definition => | |
1683 | New_Reference_To (Standard_Integer, Loc), | |
1684 | Expression => | |
725a69d2 | 1685 | Make_Function_Call (Loc, |
cdb1c38f | 1686 | Name => |
1687 | New_Reference_To (RTE (RE_Get_Entry_Index), Loc), | |
1688 | Parameter_Associations => | |
1689 | New_List ( | |
1690 | Unchecked_Convert_To (RTE (RE_Tag), | |
1691 | New_Reference_To (DT_Ptr, Loc)), | |
1692 | Make_Identifier (Loc, Name_uS))))); | |
aad6babd | 1693 | |
76a1c25b | 1694 | if Ekind (Conc_Typ) = E_Protected_Type then |
aad6babd | 1695 | |
725a69d2 | 1696 | -- Generate: |
cdb1c38f | 1697 | -- Bnn : Communication_Block; |
725a69d2 | 1698 | |
1699 | Com_Block := | |
1700 | Make_Defining_Identifier (Loc, New_Internal_Name ('B')); | |
1701 | ||
1702 | Append_To (Decls, | |
1703 | Make_Object_Declaration (Loc, | |
1704 | Defining_Identifier => | |
1705 | Com_Block, | |
1706 | Object_Definition => | |
1707 | New_Reference_To (RTE (RE_Communication_Block), Loc))); | |
1708 | ||
acf97c11 | 1709 | -- Build T._object'Access for calls below |
aad6babd | 1710 | |
acf97c11 | 1711 | Obj_Ref := |
1712 | Make_Attribute_Reference (Loc, | |
1713 | Attribute_Name => Name_Unchecked_Access, | |
1714 | Prefix => | |
1715 | Make_Selected_Component (Loc, | |
1716 | Prefix => Make_Identifier (Loc, Name_uT), | |
1717 | Selector_Name => Make_Identifier (Loc, Name_uObject))); | |
aad6babd | 1718 | |
acf97c11 | 1719 | case Corresponding_Runtime_Package (Conc_Typ) is |
1720 | when System_Tasking_Protected_Objects_Entries => | |
aad6babd | 1721 | |
acf97c11 | 1722 | -- Generate: |
1723 | -- Protected_Entry_Call | |
1724 | -- (T._object'Access, -- Object | |
1725 | -- Protected_Entry_Index! (I), -- E | |
1726 | -- P, -- Uninterpreted_Data | |
1727 | -- Asynchronous_Call, -- Mode | |
1728 | -- Bnn); -- Communication_Block | |
1729 | ||
1730 | -- where T is the protected object, I is the entry index, P | |
1731 | -- is the wrapped parameters and B is the name of the | |
1732 | -- communication block. | |
1733 | ||
1734 | Append_To (Stmts, | |
1735 | Make_Procedure_Call_Statement (Loc, | |
1736 | Name => | |
1737 | New_Reference_To (RTE (RE_Protected_Entry_Call), Loc), | |
1738 | Parameter_Associations => | |
1739 | New_List ( | |
1740 | Obj_Ref, | |
aad6babd | 1741 | |
acf97c11 | 1742 | Make_Unchecked_Type_Conversion (Loc, -- entry index |
1743 | Subtype_Mark => | |
1744 | New_Reference_To | |
1745 | (RTE (RE_Protected_Entry_Index), Loc), | |
1746 | Expression => Make_Identifier (Loc, Name_uI)), | |
d62940bf | 1747 | |
acf97c11 | 1748 | Make_Identifier (Loc, Name_uP), -- parameter block |
1749 | New_Reference_To ( -- Asynchronous_Call | |
1750 | RTE (RE_Asynchronous_Call), Loc), | |
1751 | ||
1752 | New_Reference_To (Com_Block, Loc)))); -- comm block | |
1753 | ||
1754 | when System_Tasking_Protected_Objects_Single_Entry => | |
1755 | ||
1756 | -- Generate: | |
1757 | -- procedure Protected_Single_Entry_Call | |
1758 | -- (Object : Protection_Entry_Access; | |
1759 | -- Uninterpreted_Data : System.Address; | |
1760 | -- Mode : Call_Modes); | |
725a69d2 | 1761 | |
acf97c11 | 1762 | Append_To (Stmts, |
1763 | Make_Procedure_Call_Statement (Loc, | |
1764 | Name => | |
1765 | New_Reference_To | |
1766 | (RTE (RE_Protected_Single_Entry_Call), Loc), | |
1767 | Parameter_Associations => | |
1768 | New_List ( | |
1769 | Obj_Ref, | |
1770 | ||
1771 | Make_Attribute_Reference (Loc, | |
1772 | Prefix => Make_Identifier (Loc, Name_uP), | |
1773 | Attribute_Name => Name_Address), | |
1774 | ||
1775 | New_Reference_To | |
1776 | (RTE (RE_Asynchronous_Call), Loc)))); | |
1777 | ||
1778 | when others => | |
1779 | raise Program_Error; | |
1780 | end case; | |
725a69d2 | 1781 | |
1782 | -- Generate: | |
cdb1c38f | 1783 | -- B := Dummy_Communication_Block (Bnn); |
725a69d2 | 1784 | |
1785 | Append_To (Stmts, | |
1786 | Make_Assignment_Statement (Loc, | |
1787 | Name => | |
1788 | Make_Identifier (Loc, Name_uB), | |
1789 | Expression => | |
1790 | Make_Unchecked_Type_Conversion (Loc, | |
1791 | Subtype_Mark => | |
1792 | New_Reference_To ( | |
1793 | RTE (RE_Dummy_Communication_Block), Loc), | |
1794 | Expression => | |
1795 | New_Reference_To (Com_Block, Loc)))); | |
1796 | ||
76a1c25b | 1797 | else |
1798 | pragma Assert (Ekind (Conc_Typ) = E_Task_Type); | |
d62940bf | 1799 | |
76a1c25b | 1800 | -- Generate: |
cdb1c38f | 1801 | -- Task_Entry_Call |
1802 | -- (T._task_id, -- Acceptor | |
1803 | -- Task_Entry_Index! (I), -- E | |
1804 | -- P, -- Uninterpreted_Data | |
1805 | -- Asynchronous_Call, -- Mode | |
1806 | -- F); -- Rendezvous_Successful | |
ee6ba406 | 1807 | |
acf97c11 | 1808 | -- where T is the task object, I is the entry index, P is the |
76a1c25b | 1809 | -- wrapped parameters and F is the status flag. |
ee6ba406 | 1810 | |
76a1c25b | 1811 | Append_To (Stmts, |
1812 | Make_Procedure_Call_Statement (Loc, | |
1813 | Name => | |
1814 | New_Reference_To (RTE (RE_Task_Entry_Call), Loc), | |
1815 | Parameter_Associations => | |
1816 | New_List ( | |
76a1c25b | 1817 | Make_Selected_Component (Loc, -- T._task_id |
1818 | Prefix => | |
1819 | Make_Identifier (Loc, Name_uT), | |
1820 | Selector_Name => | |
1821 | Make_Identifier (Loc, Name_uTask_Id)), | |
ee6ba406 | 1822 | |
76a1c25b | 1823 | Make_Unchecked_Type_Conversion (Loc, -- entry index |
1824 | Subtype_Mark => | |
1825 | New_Reference_To (RTE (RE_Task_Entry_Index), Loc), | |
1826 | Expression => | |
1827 | Make_Identifier (Loc, Name_uI)), | |
ee6ba406 | 1828 | |
76a1c25b | 1829 | Make_Identifier (Loc, Name_uP), -- parameter block |
1830 | New_Reference_To ( -- Asynchronous_Call | |
1831 | RTE (RE_Asynchronous_Call), Loc), | |
1832 | Make_Identifier (Loc, Name_uF)))); -- status flag | |
1833 | end if; | |
76a1c25b | 1834 | end if; |
ee6ba406 | 1835 | |
76a1c25b | 1836 | return |
1837 | Make_Subprogram_Body (Loc, | |
1838 | Specification => | |
1839 | Make_Disp_Asynchronous_Select_Spec (Typ), | |
1840 | Declarations => | |
1841 | Decls, | |
1842 | Handled_Statement_Sequence => | |
1843 | Make_Handled_Sequence_Of_Statements (Loc, Stmts)); | |
1844 | end Make_Disp_Asynchronous_Select_Body; | |
ee6ba406 | 1845 | |
76a1c25b | 1846 | ---------------------------------------- |
1847 | -- Make_Disp_Asynchronous_Select_Spec -- | |
1848 | ---------------------------------------- | |
ee6ba406 | 1849 | |
76a1c25b | 1850 | function Make_Disp_Asynchronous_Select_Spec |
1851 | (Typ : Entity_Id) return Node_Id | |
1852 | is | |
1853 | Loc : constant Source_Ptr := Sloc (Typ); | |
1854 | Def_Id : constant Node_Id := | |
1855 | Make_Defining_Identifier (Loc, | |
1856 | Name_uDisp_Asynchronous_Select); | |
1857 | Params : constant List_Id := New_List; | |
ee6ba406 | 1858 | |
76a1c25b | 1859 | begin |
68f95949 | 1860 | pragma Assert (not Restriction_Active (No_Dispatching_Calls)); |
1861 | ||
725a69d2 | 1862 | -- T : in out Typ; -- Object parameter |
1863 | -- S : Integer; -- Primitive operation slot | |
1864 | -- P : Address; -- Wrapped parameters | |
1865 | -- B : out Dummy_Communication_Block; -- Communication block dummy | |
1866 | -- F : out Boolean; -- Status flag | |
ee6ba406 | 1867 | |
725a69d2 | 1868 | Append_List_To (Params, New_List ( |
1869 | ||
1870 | Make_Parameter_Specification (Loc, | |
1871 | Defining_Identifier => | |
1872 | Make_Defining_Identifier (Loc, Name_uT), | |
1873 | Parameter_Type => | |
1874 | New_Reference_To (Typ, Loc), | |
1875 | In_Present => True, | |
1876 | Out_Present => True), | |
1877 | ||
1878 | Make_Parameter_Specification (Loc, | |
1879 | Defining_Identifier => | |
1880 | Make_Defining_Identifier (Loc, Name_uS), | |
1881 | Parameter_Type => | |
1882 | New_Reference_To (Standard_Integer, Loc)), | |
1883 | ||
1884 | Make_Parameter_Specification (Loc, | |
1885 | Defining_Identifier => | |
1886 | Make_Defining_Identifier (Loc, Name_uP), | |
1887 | Parameter_Type => | |
1888 | New_Reference_To (RTE (RE_Address), Loc)), | |
1889 | ||
1890 | Make_Parameter_Specification (Loc, | |
1891 | Defining_Identifier => | |
1892 | Make_Defining_Identifier (Loc, Name_uB), | |
1893 | Parameter_Type => | |
1894 | New_Reference_To (RTE (RE_Dummy_Communication_Block), Loc), | |
1895 | Out_Present => True), | |
ee6ba406 | 1896 | |
725a69d2 | 1897 | Make_Parameter_Specification (Loc, |
1898 | Defining_Identifier => | |
1899 | Make_Defining_Identifier (Loc, Name_uF), | |
1900 | Parameter_Type => | |
1901 | New_Reference_To (Standard_Boolean, Loc), | |
1902 | Out_Present => True))); | |
7189d17f | 1903 | |
76a1c25b | 1904 | return |
725a69d2 | 1905 | Make_Procedure_Specification (Loc, |
1906 | Defining_Unit_Name => Def_Id, | |
1907 | Parameter_Specifications => Params); | |
76a1c25b | 1908 | end Make_Disp_Asynchronous_Select_Spec; |
ee6ba406 | 1909 | |
76a1c25b | 1910 | --------------------------------------- |
1911 | -- Make_Disp_Conditional_Select_Body -- | |
1912 | --------------------------------------- | |
ee6ba406 | 1913 | |
cdb1c38f | 1914 | -- For interface types, generate: |
1915 | ||
1916 | -- procedure _Disp_Conditional_Select | |
1917 | -- (T : in out <Typ>; | |
1918 | -- S : Integer; | |
1919 | -- P : System.Address; | |
1920 | -- C : out Ada.Tags.Prim_Op_Kind; | |
1921 | -- F : out Boolean) | |
1922 | -- is | |
1923 | -- begin | |
1924 | -- null; | |
1925 | -- end _Disp_Conditional_Select; | |
1926 | ||
1927 | -- For protected types, generate: | |
1928 | ||
1929 | -- procedure _Disp_Conditional_Select | |
1930 | -- (T : in out <Typ>; | |
1931 | -- S : Integer; | |
1932 | -- P : System.Address; | |
1933 | -- C : out Ada.Tags.Prim_Op_Kind; | |
1934 | -- F : out Boolean) | |
1935 | -- is | |
1936 | -- I : Integer; | |
1937 | -- Bnn : System.Tasking.Protected_Objects.Operations. | |
1938 | -- Communication_Block; | |
1939 | ||
1940 | -- begin | |
1941 | -- C := Ada.Tags.Get_Prim_Op_Kind (Ada.Tags.Tag (<Typ>VP, S)); | |
1942 | ||
1943 | -- if C = Ada.Tags.POK_Procedure | |
1944 | -- or else C = Ada.Tags.POK_Protected_Procedure | |
1945 | -- or else C = Ada.Tags.POK_Task_Procedure | |
1946 | -- then | |
1947 | -- F := True; | |
1948 | -- return; | |
1949 | -- end if; | |
1950 | ||
1951 | -- I := Ada.Tags.Get_Entry_Index (Ada.Tags.Tag (<Typ>VP, S)); | |
1952 | -- System.Tasking.Protected_Objects.Operations.Protected_Entry_Call | |
1953 | -- (T.object'Access, | |
1954 | -- System.Tasking.Protected_Objects.Protected_Entry_Index (I), | |
1955 | -- P, | |
1956 | -- System.Tasking.Conditional_Call, | |
1957 | -- Bnn); | |
1958 | -- F := not Cancelled (Bnn); | |
1959 | -- end _Disp_Conditional_Select; | |
1960 | ||
1961 | -- For task types, generate: | |
1962 | ||
1963 | -- procedure _Disp_Conditional_Select | |
1964 | -- (T : in out <Typ>; | |
1965 | -- S : Integer; | |
1966 | -- P : System.Address; | |
1967 | -- C : out Ada.Tags.Prim_Op_Kind; | |
1968 | -- F : out Boolean) | |
1969 | -- is | |
1970 | -- I : Integer; | |
1971 | ||
1972 | -- begin | |
1973 | -- I := Ada.Tags.Get_Entry_Index (Ada.Tags.Tag (<Typ>VP, S)); | |
1974 | -- System.Tasking.Rendezvous.Task_Entry_Call | |
1975 | -- (T._task_id, | |
1976 | -- System.Tasking.Task_Entry_Index (I), | |
1977 | -- P, | |
1978 | -- System.Tasking.Conditional_Call, | |
1979 | -- F); | |
1980 | -- end _Disp_Conditional_Select; | |
1981 | ||
76a1c25b | 1982 | function Make_Disp_Conditional_Select_Body |
1983 | (Typ : Entity_Id) return Node_Id | |
1984 | is | |
1985 | Loc : constant Source_Ptr := Sloc (Typ); | |
1986 | Blk_Nam : Entity_Id; | |
1987 | Conc_Typ : Entity_Id := Empty; | |
1988 | Decls : constant List_Id := New_List; | |
1989 | DT_Ptr : Entity_Id; | |
acf97c11 | 1990 | Obj_Ref : Node_Id; |
76a1c25b | 1991 | Stmts : constant List_Id := New_List; |
ee6ba406 | 1992 | |
76a1c25b | 1993 | begin |
68f95949 | 1994 | pragma Assert (not Restriction_Active (No_Dispatching_Calls)); |
1995 | ||
952af0b9 | 1996 | -- Null body is generated for interface types |
1997 | ||
76a1c25b | 1998 | if Is_Interface (Typ) then |
1999 | return | |
2000 | Make_Subprogram_Body (Loc, | |
2001 | Specification => | |
2002 | Make_Disp_Conditional_Select_Spec (Typ), | |
2003 | Declarations => | |
2004 | No_List, | |
2005 | Handled_Statement_Sequence => | |
2006 | Make_Handled_Sequence_Of_Statements (Loc, | |
2007 | New_List (Make_Null_Statement (Loc)))); | |
2008 | end if; | |
ee6ba406 | 2009 | |
76a1c25b | 2010 | DT_Ptr := Node (First_Elmt (Access_Disp_Table (Typ))); |
ee6ba406 | 2011 | |
952af0b9 | 2012 | if Is_Concurrent_Record_Type (Typ) then |
2013 | Conc_Typ := Corresponding_Concurrent_Type (Typ); | |
ee6ba406 | 2014 | |
76a1c25b | 2015 | -- Generate: |
2016 | -- I : Integer; | |
ee6ba406 | 2017 | |
76a1c25b | 2018 | -- where I will be used to capture the entry index of the primitive |
2019 | -- wrapper at position S. | |
ee6ba406 | 2020 | |
76a1c25b | 2021 | Append_To (Decls, |
2022 | Make_Object_Declaration (Loc, | |
2023 | Defining_Identifier => | |
2024 | Make_Defining_Identifier (Loc, Name_uI), | |
2025 | Object_Definition => | |
2026 | New_Reference_To (Standard_Integer, Loc))); | |
ee6ba406 | 2027 | |
952af0b9 | 2028 | -- Generate: |
cdb1c38f | 2029 | -- C := Ada.Tags.Get_Prim_Op_Kind (Ada.Tags.Tag! (<type>VP), S); |
ee6ba406 | 2030 | |
952af0b9 | 2031 | -- if C = POK_Procedure |
2032 | -- or else C = POK_Protected_Procedure | |
2033 | -- or else C = POK_Task_Procedure; | |
2034 | -- then | |
2035 | -- F := True; | |
2036 | -- return; | |
2037 | -- end if; | |
aad6babd | 2038 | |
725a69d2 | 2039 | Build_Common_Dispatching_Select_Statements (Loc, DT_Ptr, Stmts); |
aad6babd | 2040 | |
76a1c25b | 2041 | -- Generate: |
2042 | -- Bnn : Communication_Block; | |
aad6babd | 2043 | |
cdb1c38f | 2044 | -- where Bnn is the name of the communication block used in the |
2045 | -- call to Protected_Entry_Call. | |
aad6babd | 2046 | |
76a1c25b | 2047 | Blk_Nam := Make_Defining_Identifier (Loc, New_Internal_Name ('B')); |
aad6babd | 2048 | |
76a1c25b | 2049 | Append_To (Decls, |
2050 | Make_Object_Declaration (Loc, | |
2051 | Defining_Identifier => | |
2052 | Blk_Nam, | |
2053 | Object_Definition => | |
2054 | New_Reference_To (RTE (RE_Communication_Block), Loc))); | |
aad6babd | 2055 | |
76a1c25b | 2056 | -- Generate: |
cdb1c38f | 2057 | -- I := Ada.Tags.Get_Entry_Index (Ada.Tags.Tag! (<type>VP), S); |
aad6babd | 2058 | |
76a1c25b | 2059 | -- I is the entry index and S is the dispatch table slot |
aad6babd | 2060 | |
76a1c25b | 2061 | Append_To (Stmts, |
2062 | Make_Assignment_Statement (Loc, | |
2063 | Name => | |
2064 | Make_Identifier (Loc, Name_uI), | |
2065 | Expression => | |
725a69d2 | 2066 | Make_Function_Call (Loc, |
cdb1c38f | 2067 | Name => |
2068 | New_Reference_To (RTE (RE_Get_Entry_Index), Loc), | |
2069 | Parameter_Associations => | |
2070 | New_List ( | |
2071 | Unchecked_Convert_To (RTE (RE_Tag), | |
2072 | New_Reference_To (DT_Ptr, Loc)), | |
2073 | Make_Identifier (Loc, Name_uS))))); | |
ee6ba406 | 2074 | |
76a1c25b | 2075 | if Ekind (Conc_Typ) = E_Protected_Type then |
ee6ba406 | 2076 | |
acf97c11 | 2077 | Obj_Ref := -- T._object'Access |
2078 | Make_Attribute_Reference (Loc, | |
2079 | Attribute_Name => Name_Unchecked_Access, | |
2080 | Prefix => | |
2081 | Make_Selected_Component (Loc, | |
2082 | Prefix => Make_Identifier (Loc, Name_uT), | |
2083 | Selector_Name => Make_Identifier (Loc, Name_uObject))); | |
ee6ba406 | 2084 | |
acf97c11 | 2085 | case Corresponding_Runtime_Package (Conc_Typ) is |
2086 | when System_Tasking_Protected_Objects_Entries => | |
2087 | -- Generate: | |
e1c20931 | 2088 | |
acf97c11 | 2089 | -- Protected_Entry_Call |
2090 | -- (T._object'Access, -- Object | |
2091 | -- Protected_Entry_Index! (I), -- E | |
2092 | -- P, -- Uninterpreted_Data | |
2093 | -- Conditional_Call, -- Mode | |
2094 | -- Bnn); -- Block | |
e1c20931 | 2095 | |
acf97c11 | 2096 | -- where T is the protected object, I is the entry index, P |
2097 | -- are the wrapped parameters and Bnn is the name of the | |
2098 | -- communication block. | |
d62940bf | 2099 | |
acf97c11 | 2100 | Append_To (Stmts, |
2101 | Make_Procedure_Call_Statement (Loc, | |
2102 | Name => | |
2103 | New_Reference_To (RTE (RE_Protected_Entry_Call), Loc), | |
2104 | Parameter_Associations => | |
2105 | New_List ( | |
2106 | Obj_Ref, | |
d62940bf | 2107 | |
acf97c11 | 2108 | Make_Unchecked_Type_Conversion (Loc, -- entry index |
2109 | Subtype_Mark => | |
2110 | New_Reference_To | |
2111 | (RTE (RE_Protected_Entry_Index), Loc), | |
2112 | Expression => Make_Identifier (Loc, Name_uI)), | |
2113 | ||
2114 | Make_Identifier (Loc, Name_uP), -- parameter block | |
2115 | ||
2116 | New_Reference_To ( -- Conditional_Call | |
2117 | RTE (RE_Conditional_Call), Loc), | |
2118 | New_Reference_To ( -- Bnn | |
2119 | Blk_Nam, Loc)))); | |
2120 | ||
2121 | when System_Tasking_Protected_Objects_Single_Entry => | |
2122 | ||
2123 | -- If we are compiling for a restricted run-time, the call | |
2124 | -- uses the simpler form. | |
2125 | ||
2126 | Append_To (Stmts, | |
2127 | Make_Procedure_Call_Statement (Loc, | |
2128 | Name => | |
2129 | New_Reference_To | |
2130 | (RTE (RE_Protected_Single_Entry_Call), Loc), | |
2131 | Parameter_Associations => | |
2132 | New_List ( | |
2133 | Obj_Ref, | |
2134 | ||
2135 | Make_Attribute_Reference (Loc, | |
2136 | Prefix => Make_Identifier (Loc, Name_uP), | |
2137 | Attribute_Name => Name_Address), | |
2138 | ||
2139 | New_Reference_To | |
2140 | (RTE (RE_Conditional_Call), Loc)))); | |
2141 | when others => | |
2142 | raise Program_Error; | |
2143 | end case; | |
d62940bf | 2144 | |
76a1c25b | 2145 | -- Generate: |
2146 | -- F := not Cancelled (Bnn); | |
e1c20931 | 2147 | |
76a1c25b | 2148 | -- where F is the success flag. The status of Cancelled is negated |
2149 | -- in order to match the behaviour of the version for task types. | |
e1c20931 | 2150 | |
76a1c25b | 2151 | Append_To (Stmts, |
2152 | Make_Assignment_Statement (Loc, | |
2153 | Name => | |
2154 | Make_Identifier (Loc, Name_uF), | |
2155 | Expression => | |
2156 | Make_Op_Not (Loc, | |
2157 | Right_Opnd => | |
2158 | Make_Function_Call (Loc, | |
2159 | Name => | |
2160 | New_Reference_To (RTE (RE_Cancelled), Loc), | |
2161 | Parameter_Associations => | |
2162 | New_List ( | |
2163 | New_Reference_To (Blk_Nam, Loc)))))); | |
2164 | else | |
2165 | pragma Assert (Ekind (Conc_Typ) = E_Task_Type); | |
d62940bf | 2166 | |
76a1c25b | 2167 | -- Generate: |
cdb1c38f | 2168 | -- Task_Entry_Call |
2169 | -- (T._task_id, -- Acceptor | |
2170 | -- Task_Entry_Index! (I), -- E | |
2171 | -- P, -- Uninterpreted_Data | |
2172 | -- Conditional_Call, -- Mode | |
2173 | -- F); -- Rendezvous_Successful | |
d62940bf | 2174 | |
76a1c25b | 2175 | -- where T is the task object, I is the entry index, P are the |
2176 | -- wrapped parameters and F is the status flag. | |
e1c20931 | 2177 | |
76a1c25b | 2178 | Append_To (Stmts, |
2179 | Make_Procedure_Call_Statement (Loc, | |
2180 | Name => | |
2181 | New_Reference_To (RTE (RE_Task_Entry_Call), Loc), | |
2182 | Parameter_Associations => | |
2183 | New_List ( | |
2184 | ||
2185 | Make_Selected_Component (Loc, -- T._task_id | |
2186 | Prefix => | |
2187 | Make_Identifier (Loc, Name_uT), | |
2188 | Selector_Name => | |
2189 | Make_Identifier (Loc, Name_uTask_Id)), | |
2190 | ||
2191 | Make_Unchecked_Type_Conversion (Loc, -- entry index | |
2192 | Subtype_Mark => | |
2193 | New_Reference_To (RTE (RE_Task_Entry_Index), Loc), | |
2194 | Expression => | |
2195 | Make_Identifier (Loc, Name_uI)), | |
2196 | ||
2197 | Make_Identifier (Loc, Name_uP), -- parameter block | |
2198 | New_Reference_To ( -- Conditional_Call | |
2199 | RTE (RE_Conditional_Call), Loc), | |
2200 | Make_Identifier (Loc, Name_uF)))); -- status flag | |
d62940bf | 2201 | end if; |
76a1c25b | 2202 | end if; |
2203 | ||
2204 | return | |
2205 | Make_Subprogram_Body (Loc, | |
2206 | Specification => | |
2207 | Make_Disp_Conditional_Select_Spec (Typ), | |
2208 | Declarations => | |
2209 | Decls, | |
2210 | Handled_Statement_Sequence => | |
2211 | Make_Handled_Sequence_Of_Statements (Loc, Stmts)); | |
2212 | end Make_Disp_Conditional_Select_Body; | |
2213 | ||
2214 | --------------------------------------- | |
2215 | -- Make_Disp_Conditional_Select_Spec -- | |
2216 | --------------------------------------- | |
2217 | ||
2218 | function Make_Disp_Conditional_Select_Spec | |
2219 | (Typ : Entity_Id) return Node_Id | |
2220 | is | |
2221 | Loc : constant Source_Ptr := Sloc (Typ); | |
2222 | Def_Id : constant Node_Id := | |
2223 | Make_Defining_Identifier (Loc, | |
2224 | Name_uDisp_Conditional_Select); | |
2225 | Params : constant List_Id := New_List; | |
2226 | ||
2227 | begin | |
68f95949 | 2228 | pragma Assert (not Restriction_Active (No_Dispatching_Calls)); |
2229 | ||
725a69d2 | 2230 | -- T : in out Typ; -- Object parameter |
2231 | -- S : Integer; -- Primitive operation slot | |
2232 | -- P : Address; -- Wrapped parameters | |
2233 | -- C : out Prim_Op_Kind; -- Call kind | |
2234 | -- F : out Boolean; -- Status flag | |
2235 | ||
2236 | Append_List_To (Params, New_List ( | |
2237 | ||
2238 | Make_Parameter_Specification (Loc, | |
2239 | Defining_Identifier => | |
2240 | Make_Defining_Identifier (Loc, Name_uT), | |
2241 | Parameter_Type => | |
2242 | New_Reference_To (Typ, Loc), | |
2243 | In_Present => True, | |
2244 | Out_Present => True), | |
2245 | ||
2246 | Make_Parameter_Specification (Loc, | |
2247 | Defining_Identifier => | |
2248 | Make_Defining_Identifier (Loc, Name_uS), | |
2249 | Parameter_Type => | |
2250 | New_Reference_To (Standard_Integer, Loc)), | |
2251 | ||
2252 | Make_Parameter_Specification (Loc, | |
2253 | Defining_Identifier => | |
2254 | Make_Defining_Identifier (Loc, Name_uP), | |
2255 | Parameter_Type => | |
2256 | New_Reference_To (RTE (RE_Address), Loc)), | |
76a1c25b | 2257 | |
725a69d2 | 2258 | Make_Parameter_Specification (Loc, |
2259 | Defining_Identifier => | |
2260 | Make_Defining_Identifier (Loc, Name_uC), | |
2261 | Parameter_Type => | |
2262 | New_Reference_To (RTE (RE_Prim_Op_Kind), Loc), | |
2263 | Out_Present => True), | |
76a1c25b | 2264 | |
725a69d2 | 2265 | Make_Parameter_Specification (Loc, |
2266 | Defining_Identifier => | |
2267 | Make_Defining_Identifier (Loc, Name_uF), | |
2268 | Parameter_Type => | |
2269 | New_Reference_To (Standard_Boolean, Loc), | |
2270 | Out_Present => True))); | |
76a1c25b | 2271 | |
2272 | return | |
2273 | Make_Procedure_Specification (Loc, | |
2274 | Defining_Unit_Name => Def_Id, | |
2275 | Parameter_Specifications => Params); | |
2276 | end Make_Disp_Conditional_Select_Spec; | |
2277 | ||
2278 | ------------------------------------- | |
2279 | -- Make_Disp_Get_Prim_Op_Kind_Body -- | |
2280 | ------------------------------------- | |
2281 | ||
2282 | function Make_Disp_Get_Prim_Op_Kind_Body | |
2283 | (Typ : Entity_Id) return Node_Id | |
2284 | is | |
2285 | Loc : constant Source_Ptr := Sloc (Typ); | |
2286 | DT_Ptr : Entity_Id; | |
2287 | ||
2288 | begin | |
68f95949 | 2289 | pragma Assert (not Restriction_Active (No_Dispatching_Calls)); |
2290 | ||
76a1c25b | 2291 | if Is_Interface (Typ) then |
2292 | return | |
2293 | Make_Subprogram_Body (Loc, | |
2294 | Specification => | |
2295 | Make_Disp_Get_Prim_Op_Kind_Spec (Typ), | |
2296 | Declarations => | |
2297 | New_List, | |
2298 | Handled_Statement_Sequence => | |
2299 | Make_Handled_Sequence_Of_Statements (Loc, | |
2300 | New_List (Make_Null_Statement (Loc)))); | |
e1c20931 | 2301 | end if; |
2302 | ||
76a1c25b | 2303 | DT_Ptr := Node (First_Elmt (Access_Disp_Table (Typ))); |
2304 | ||
d62940bf | 2305 | -- Generate: |
76a1c25b | 2306 | -- C := get_prim_op_kind (tag! (<type>VP), S); |
ee6ba406 | 2307 | |
76a1c25b | 2308 | -- where C is the out parameter capturing the call kind and S is the |
2309 | -- dispatch table slot number. | |
ee6ba406 | 2310 | |
76a1c25b | 2311 | return |
2312 | Make_Subprogram_Body (Loc, | |
2313 | Specification => | |
2314 | Make_Disp_Get_Prim_Op_Kind_Spec (Typ), | |
2315 | Declarations => | |
2316 | New_List, | |
2317 | Handled_Statement_Sequence => | |
2318 | Make_Handled_Sequence_Of_Statements (Loc, | |
2319 | New_List ( | |
2320 | Make_Assignment_Statement (Loc, | |
2321 | Name => | |
2322 | Make_Identifier (Loc, Name_uC), | |
2323 | Expression => | |
725a69d2 | 2324 | Make_Function_Call (Loc, |
2325 | Name => | |
2326 | New_Reference_To (RTE (RE_Get_Prim_Op_Kind), Loc), | |
2327 | Parameter_Associations => New_List ( | |
2328 | Unchecked_Convert_To (RTE (RE_Tag), | |
2329 | New_Reference_To (DT_Ptr, Loc)), | |
2330 | Make_Identifier (Loc, Name_uS))))))); | |
76a1c25b | 2331 | end Make_Disp_Get_Prim_Op_Kind_Body; |
e1c20931 | 2332 | |
76a1c25b | 2333 | ------------------------------------- |
2334 | -- Make_Disp_Get_Prim_Op_Kind_Spec -- | |
2335 | ------------------------------------- | |
e1c20931 | 2336 | |
76a1c25b | 2337 | function Make_Disp_Get_Prim_Op_Kind_Spec |
2338 | (Typ : Entity_Id) return Node_Id | |
2339 | is | |
2340 | Loc : constant Source_Ptr := Sloc (Typ); | |
2341 | Def_Id : constant Node_Id := | |
2342 | Make_Defining_Identifier (Loc, | |
2343 | Name_uDisp_Get_Prim_Op_Kind); | |
2344 | Params : constant List_Id := New_List; | |
e1c20931 | 2345 | |
76a1c25b | 2346 | begin |
68f95949 | 2347 | pragma Assert (not Restriction_Active (No_Dispatching_Calls)); |
2348 | ||
725a69d2 | 2349 | -- T : in out Typ; -- Object parameter |
2350 | -- S : Integer; -- Primitive operation slot | |
2351 | -- C : out Prim_Op_Kind; -- Call kind | |
2352 | ||
2353 | Append_List_To (Params, New_List ( | |
2354 | ||
2355 | Make_Parameter_Specification (Loc, | |
2356 | Defining_Identifier => | |
2357 | Make_Defining_Identifier (Loc, Name_uT), | |
2358 | Parameter_Type => | |
2359 | New_Reference_To (Typ, Loc), | |
2360 | In_Present => True, | |
2361 | Out_Present => True), | |
ee6ba406 | 2362 | |
725a69d2 | 2363 | Make_Parameter_Specification (Loc, |
2364 | Defining_Identifier => | |
2365 | Make_Defining_Identifier (Loc, Name_uS), | |
2366 | Parameter_Type => | |
2367 | New_Reference_To (Standard_Integer, Loc)), | |
ee6ba406 | 2368 | |
725a69d2 | 2369 | Make_Parameter_Specification (Loc, |
2370 | Defining_Identifier => | |
2371 | Make_Defining_Identifier (Loc, Name_uC), | |
2372 | Parameter_Type => | |
2373 | New_Reference_To (RTE (RE_Prim_Op_Kind), Loc), | |
2374 | Out_Present => True))); | |
76a1c25b | 2375 | |
2376 | return | |
2377 | Make_Procedure_Specification (Loc, | |
2378 | Defining_Unit_Name => Def_Id, | |
2379 | Parameter_Specifications => Params); | |
2380 | end Make_Disp_Get_Prim_Op_Kind_Spec; | |
2381 | ||
2382 | -------------------------------- | |
2383 | -- Make_Disp_Get_Task_Id_Body -- | |
2384 | -------------------------------- | |
2385 | ||
2386 | function Make_Disp_Get_Task_Id_Body | |
2387 | (Typ : Entity_Id) return Node_Id | |
2388 | is | |
2389 | Loc : constant Source_Ptr := Sloc (Typ); | |
2390 | Ret : Node_Id; | |
2391 | ||
2392 | begin | |
68f95949 | 2393 | pragma Assert (not Restriction_Active (No_Dispatching_Calls)); |
2394 | ||
76a1c25b | 2395 | if Is_Concurrent_Record_Type (Typ) |
2396 | and then Ekind (Corresponding_Concurrent_Type (Typ)) = E_Task_Type | |
2397 | then | |
725a69d2 | 2398 | -- Generate: |
2399 | -- return To_Address (_T._task_id); | |
2400 | ||
76a1c25b | 2401 | Ret := |
17e14451 | 2402 | Make_Simple_Return_Statement (Loc, |
76a1c25b | 2403 | Expression => |
725a69d2 | 2404 | Make_Unchecked_Type_Conversion (Loc, |
2405 | Subtype_Mark => | |
2406 | New_Reference_To (RTE (RE_Address), Loc), | |
2407 | Expression => | |
2408 | Make_Selected_Component (Loc, | |
2409 | Prefix => | |
2410 | Make_Identifier (Loc, Name_uT), | |
2411 | Selector_Name => | |
2412 | Make_Identifier (Loc, Name_uTask_Id)))); | |
76a1c25b | 2413 | |
2414 | -- A null body is constructed for non-task types | |
2415 | ||
2416 | else | |
725a69d2 | 2417 | -- Generate: |
2418 | -- return Null_Address; | |
2419 | ||
76a1c25b | 2420 | Ret := |
17e14451 | 2421 | Make_Simple_Return_Statement (Loc, |
76a1c25b | 2422 | Expression => |
725a69d2 | 2423 | New_Reference_To (RTE (RE_Null_Address), Loc)); |
76a1c25b | 2424 | end if; |
2425 | ||
2426 | return | |
2427 | Make_Subprogram_Body (Loc, | |
2428 | Specification => | |
2429 | Make_Disp_Get_Task_Id_Spec (Typ), | |
2430 | Declarations => | |
2431 | New_List, | |
2432 | Handled_Statement_Sequence => | |
2433 | Make_Handled_Sequence_Of_Statements (Loc, | |
2434 | New_List (Ret))); | |
2435 | end Make_Disp_Get_Task_Id_Body; | |
2436 | ||
2437 | -------------------------------- | |
2438 | -- Make_Disp_Get_Task_Id_Spec -- | |
2439 | -------------------------------- | |
2440 | ||
2441 | function Make_Disp_Get_Task_Id_Spec | |
2442 | (Typ : Entity_Id) return Node_Id | |
2443 | is | |
725a69d2 | 2444 | Loc : constant Source_Ptr := Sloc (Typ); |
76a1c25b | 2445 | |
2446 | begin | |
68f95949 | 2447 | pragma Assert (not Restriction_Active (No_Dispatching_Calls)); |
2448 | ||
76a1c25b | 2449 | return |
2450 | Make_Function_Specification (Loc, | |
725a69d2 | 2451 | Defining_Unit_Name => |
2452 | Make_Defining_Identifier (Loc, Name_uDisp_Get_Task_Id), | |
76a1c25b | 2453 | Parameter_Specifications => New_List ( |
2454 | Make_Parameter_Specification (Loc, | |
2455 | Defining_Identifier => | |
2456 | Make_Defining_Identifier (Loc, Name_uT), | |
2457 | Parameter_Type => | |
2458 | New_Reference_To (Typ, Loc))), | |
2459 | Result_Definition => | |
725a69d2 | 2460 | New_Reference_To (RTE (RE_Address), Loc)); |
76a1c25b | 2461 | end Make_Disp_Get_Task_Id_Spec; |
2462 | ||
cdb1c38f | 2463 | ---------------------------- |
2464 | -- Make_Disp_Requeue_Body -- | |
2465 | ---------------------------- | |
2466 | ||
2467 | function Make_Disp_Requeue_Body | |
2468 | (Typ : Entity_Id) return Node_Id | |
2469 | is | |
2470 | Loc : constant Source_Ptr := Sloc (Typ); | |
2471 | Conc_Typ : Entity_Id := Empty; | |
2472 | Stmts : constant List_Id := New_List; | |
2473 | ||
2474 | begin | |
2475 | pragma Assert (not Restriction_Active (No_Dispatching_Calls)); | |
2476 | ||
2477 | -- Null body is generated for interface types and non-concurrent | |
2478 | -- tagged types. | |
2479 | ||
2480 | if Is_Interface (Typ) | |
2481 | or else not Is_Concurrent_Record_Type (Typ) | |
2482 | then | |
2483 | return | |
2484 | Make_Subprogram_Body (Loc, | |
2485 | Specification => | |
2486 | Make_Disp_Requeue_Spec (Typ), | |
2487 | Declarations => | |
2488 | No_List, | |
2489 | Handled_Statement_Sequence => | |
2490 | Make_Handled_Sequence_Of_Statements (Loc, | |
2491 | New_List (Make_Null_Statement (Loc)))); | |
2492 | end if; | |
2493 | ||
2494 | Conc_Typ := Corresponding_Concurrent_Type (Typ); | |
2495 | ||
2496 | if Ekind (Conc_Typ) = E_Protected_Type then | |
2497 | ||
2498 | -- Generate statements: | |
2499 | -- if F then | |
2500 | -- System.Tasking.Protected_Objects.Operations. | |
2501 | -- Requeue_Protected_Entry | |
2502 | -- (Protection_Entries_Access (P), | |
2503 | -- O._object'Unchecked_Access, | |
2504 | -- Protected_Entry_Index (I), | |
2505 | -- A); | |
2506 | -- else | |
2507 | -- System.Tasking.Protected_Objects.Operations. | |
2508 | -- Requeue_Task_To_Protected_Entry | |
2509 | -- (O._object'Unchecked_Access, | |
2510 | -- Protected_Entry_Index (I), | |
2511 | -- A); | |
2512 | -- end if; | |
2513 | ||
acf97c11 | 2514 | if Restriction_Active (No_Entry_Queue) then |
2515 | Append_To (Stmts, Make_Null_Statement (Loc)); | |
2516 | else | |
2517 | Append_To (Stmts, | |
2518 | Make_If_Statement (Loc, | |
2519 | Condition => | |
2520 | Make_Identifier (Loc, Name_uF), | |
cdb1c38f | 2521 | |
acf97c11 | 2522 | Then_Statements => |
2523 | New_List ( | |
cdb1c38f | 2524 | |
acf97c11 | 2525 | -- Call to Requeue_Protected_Entry |
cdb1c38f | 2526 | |
acf97c11 | 2527 | Make_Procedure_Call_Statement (Loc, |
2528 | Name => | |
2529 | New_Reference_To ( | |
2530 | RTE (RE_Requeue_Protected_Entry), Loc), | |
2531 | Parameter_Associations => | |
2532 | New_List ( | |
2533 | ||
2534 | Make_Unchecked_Type_Conversion (Loc, -- PEA (P) | |
2535 | Subtype_Mark => | |
2536 | New_Reference_To ( | |
2537 | RTE (RE_Protection_Entries_Access), Loc), | |
2538 | Expression => | |
2539 | Make_Identifier (Loc, Name_uP)), | |
2540 | ||
2541 | Make_Attribute_Reference (Loc, -- O._object'Acc | |
2542 | Attribute_Name => | |
2543 | Name_Unchecked_Access, | |
2544 | Prefix => | |
2545 | Make_Selected_Component (Loc, | |
2546 | Prefix => | |
2547 | Make_Identifier (Loc, Name_uO), | |
2548 | Selector_Name => | |
2549 | Make_Identifier (Loc, Name_uObject))), | |
2550 | ||
2551 | Make_Unchecked_Type_Conversion (Loc, -- entry index | |
2552 | Subtype_Mark => | |
2553 | New_Reference_To ( | |
2554 | RTE (RE_Protected_Entry_Index), Loc), | |
2555 | Expression => | |
2556 | Make_Identifier (Loc, Name_uI)), | |
cdb1c38f | 2557 | |
acf97c11 | 2558 | Make_Identifier (Loc, Name_uA)))), -- abort status |
cdb1c38f | 2559 | |
acf97c11 | 2560 | Else_Statements => |
2561 | New_List ( | |
cdb1c38f | 2562 | |
acf97c11 | 2563 | -- Call to Requeue_Task_To_Protected_Entry |
cdb1c38f | 2564 | |
acf97c11 | 2565 | Make_Procedure_Call_Statement (Loc, |
2566 | Name => | |
2567 | New_Reference_To ( | |
2568 | RTE (RE_Requeue_Task_To_Protected_Entry), Loc), | |
2569 | Parameter_Associations => | |
2570 | New_List ( | |
2571 | ||
2572 | Make_Attribute_Reference (Loc, -- O._object'Acc | |
2573 | Attribute_Name => | |
2574 | Name_Unchecked_Access, | |
2575 | Prefix => | |
2576 | Make_Selected_Component (Loc, | |
2577 | Prefix => | |
2578 | Make_Identifier (Loc, Name_uO), | |
2579 | Selector_Name => | |
2580 | Make_Identifier (Loc, Name_uObject))), | |
2581 | ||
2582 | Make_Unchecked_Type_Conversion (Loc, -- entry index | |
2583 | Subtype_Mark => | |
2584 | New_Reference_To ( | |
2585 | RTE (RE_Protected_Entry_Index), Loc), | |
2586 | Expression => | |
2587 | Make_Identifier (Loc, Name_uI)), | |
cdb1c38f | 2588 | |
acf97c11 | 2589 | Make_Identifier (Loc, Name_uA)))))); -- abort status |
2590 | end if; | |
cdb1c38f | 2591 | else |
2592 | pragma Assert (Is_Task_Type (Conc_Typ)); | |
2593 | ||
2594 | -- Generate: | |
2595 | -- if F then | |
2596 | -- System.Tasking.Rendezvous.Requeue_Protected_To_Task_Entry | |
2597 | -- (Protection_Entries_Access (P), | |
2598 | -- O._task_id, | |
2599 | -- Task_Entry_Index (I), | |
2600 | -- A); | |
2601 | -- else | |
2602 | -- System.Tasking.Rendezvous.Requeue_Task_Entry | |
2603 | -- (O._task_id, | |
2604 | -- Task_Entry_Index (I), | |
2605 | -- A); | |
2606 | -- end if; | |
2607 | ||
2608 | Append_To (Stmts, | |
2609 | Make_If_Statement (Loc, | |
2610 | Condition => | |
2611 | Make_Identifier (Loc, Name_uF), | |
2612 | ||
2613 | Then_Statements => | |
2614 | New_List ( | |
2615 | ||
2616 | -- Call to Requeue_Protected_To_Task_Entry | |
2617 | ||
2618 | Make_Procedure_Call_Statement (Loc, | |
2619 | Name => | |
2620 | New_Reference_To ( | |
2621 | RTE (RE_Requeue_Protected_To_Task_Entry), Loc), | |
2622 | ||
2623 | Parameter_Associations => | |
2624 | New_List ( | |
2625 | ||
2626 | Make_Unchecked_Type_Conversion (Loc, -- PEA (P) | |
2627 | Subtype_Mark => | |
2628 | New_Reference_To ( | |
2629 | RTE (RE_Protection_Entries_Access), Loc), | |
2630 | Expression => | |
2631 | Make_Identifier (Loc, Name_uP)), | |
2632 | ||
2633 | Make_Selected_Component (Loc, -- O._task_id | |
2634 | Prefix => | |
2635 | Make_Identifier (Loc, Name_uO), | |
2636 | Selector_Name => | |
2637 | Make_Identifier (Loc, Name_uTask_Id)), | |
2638 | ||
2639 | Make_Unchecked_Type_Conversion (Loc, -- entry index | |
2640 | Subtype_Mark => | |
2641 | New_Reference_To ( | |
2642 | RTE (RE_Task_Entry_Index), Loc), | |
2643 | Expression => | |
2644 | Make_Identifier (Loc, Name_uI)), | |
2645 | ||
2646 | Make_Identifier (Loc, Name_uA)))), -- abort status | |
2647 | ||
2648 | Else_Statements => | |
2649 | New_List ( | |
2650 | ||
2651 | -- Call to Requeue_Task_Entry | |
2652 | ||
2653 | Make_Procedure_Call_Statement (Loc, | |
2654 | Name => | |
2655 | New_Reference_To (RTE (RE_Requeue_Task_Entry), Loc), | |
2656 | ||
2657 | Parameter_Associations => | |
2658 | New_List ( | |
2659 | ||
2660 | Make_Selected_Component (Loc, -- O._task_id | |
2661 | Prefix => | |
2662 | Make_Identifier (Loc, Name_uO), | |
2663 | Selector_Name => | |
2664 | Make_Identifier (Loc, Name_uTask_Id)), | |
2665 | ||
2666 | Make_Unchecked_Type_Conversion (Loc, -- entry index | |
2667 | Subtype_Mark => | |
2668 | New_Reference_To ( | |
2669 | RTE (RE_Task_Entry_Index), Loc), | |
2670 | Expression => | |
2671 | Make_Identifier (Loc, Name_uI)), | |
2672 | ||
2673 | Make_Identifier (Loc, Name_uA)))))); -- abort status | |
2674 | end if; | |
2675 | ||
2676 | -- Even though no declarations are needed in both cases, we allocate | |
2677 | -- a list for entities added by Freeze. | |
2678 | ||
2679 | return | |
2680 | Make_Subprogram_Body (Loc, | |
2681 | Specification => | |
2682 | Make_Disp_Requeue_Spec (Typ), | |
2683 | Declarations => | |
2684 | New_List, | |
2685 | Handled_Statement_Sequence => | |
2686 | Make_Handled_Sequence_Of_Statements (Loc, Stmts)); | |
2687 | end Make_Disp_Requeue_Body; | |
2688 | ||
2689 | ---------------------------- | |
2690 | -- Make_Disp_Requeue_Spec -- | |
2691 | ---------------------------- | |
2692 | ||
2693 | function Make_Disp_Requeue_Spec | |
2694 | (Typ : Entity_Id) return Node_Id | |
2695 | is | |
2696 | Loc : constant Source_Ptr := Sloc (Typ); | |
2697 | ||
2698 | begin | |
2699 | pragma Assert (not Restriction_Active (No_Dispatching_Calls)); | |
2700 | ||
2701 | -- O : in out Typ; - Object parameter | |
2702 | -- F : Boolean; - Protected (True) / task (False) flag | |
2703 | -- P : Address; - Protection_Entries_Access value | |
2704 | -- I : Entry_Index - Index of entry call | |
2705 | -- A : Boolean - Abort flag | |
2706 | ||
2707 | -- Note that the Protection_Entries_Access value is represented as a | |
2708 | -- System.Address in order to avoid dragging in the tasking runtime | |
2709 | -- when compiling sources without tasking constructs. | |
2710 | ||
2711 | return | |
2712 | Make_Procedure_Specification (Loc, | |
2713 | Defining_Unit_Name => | |
2714 | Make_Defining_Identifier (Loc, Name_uDisp_Requeue), | |
2715 | ||
2716 | Parameter_Specifications => | |
2717 | New_List ( | |
2718 | ||
2719 | Make_Parameter_Specification (Loc, -- O | |
2720 | Defining_Identifier => | |
2721 | Make_Defining_Identifier (Loc, Name_uO), | |
2722 | Parameter_Type => | |
2723 | New_Reference_To (Typ, Loc), | |
2724 | In_Present => True, | |
2725 | Out_Present => True), | |
2726 | ||
2727 | Make_Parameter_Specification (Loc, -- F | |
2728 | Defining_Identifier => | |
2729 | Make_Defining_Identifier (Loc, Name_uF), | |
2730 | Parameter_Type => | |
2731 | New_Reference_To (Standard_Boolean, Loc)), | |
2732 | ||
2733 | Make_Parameter_Specification (Loc, -- P | |
2734 | Defining_Identifier => | |
2735 | Make_Defining_Identifier (Loc, Name_uP), | |
2736 | Parameter_Type => | |
2737 | New_Reference_To (RTE (RE_Address), Loc)), | |
2738 | ||
2739 | Make_Parameter_Specification (Loc, -- I | |
2740 | Defining_Identifier => | |
2741 | Make_Defining_Identifier (Loc, Name_uI), | |
2742 | Parameter_Type => | |
2743 | New_Reference_To (Standard_Integer, Loc)), | |
2744 | ||
2745 | Make_Parameter_Specification (Loc, -- A | |
2746 | Defining_Identifier => | |
2747 | Make_Defining_Identifier (Loc, Name_uA), | |
2748 | Parameter_Type => | |
2749 | New_Reference_To (Standard_Boolean, Loc)))); | |
2750 | end Make_Disp_Requeue_Spec; | |
2751 | ||
76a1c25b | 2752 | --------------------------------- |
2753 | -- Make_Disp_Timed_Select_Body -- | |
2754 | --------------------------------- | |
2755 | ||
cdb1c38f | 2756 | -- For interface types, generate: |
2757 | ||
2758 | -- procedure _Disp_Timed_Select | |
2759 | -- (T : in out <Typ>; | |
2760 | -- S : Integer; | |
2761 | -- P : System.Address; | |
2762 | -- D : Duration; | |
2763 | -- M : Integer; | |
2764 | -- C : out Ada.Tags.Prim_Op_Kind; | |
2765 | -- F : out Boolean) | |
2766 | -- is | |
2767 | -- begin | |
2768 | -- null; | |
2769 | -- end _Disp_Timed_Select; | |
2770 | ||
2771 | -- For protected types, generate: | |
2772 | ||
2773 | -- procedure _Disp_Timed_Select | |
2774 | -- (T : in out <Typ>; | |
2775 | -- S : Integer; | |
2776 | -- P : System.Address; | |
2777 | -- D : Duration; | |
2778 | -- M : Integer; | |
2779 | -- C : out Ada.Tags.Prim_Op_Kind; | |
2780 | -- F : out Boolean) | |
2781 | -- is | |
2782 | -- I : Integer; | |
2783 | ||
2784 | -- begin | |
2785 | -- C := Ada.Tags.Get_Prim_Op_Kind (Ada.Tags.Tag (<Typ>VP), S); | |
2786 | ||
2787 | -- if C = Ada.Tags.POK_Procedure | |
2788 | -- or else C = Ada.Tags.POK_Protected_Procedure | |
2789 | -- or else C = Ada.Tags.POK_Task_Procedure | |
2790 | -- then | |
2791 | -- F := True; | |
2792 | -- return; | |
2793 | -- end if; | |
2794 | ||
2795 | -- I := Ada.Tags.Get_Entry_Index (Ada.Tags.Tag (<Typ>VP), S); | |
2796 | -- System.Tasking.Protected_Objects.Operations. | |
2797 | -- Timed_Protected_Entry_Call | |
2798 | -- (T._object'Access, | |
2799 | -- System.Tasking.Protected_Objects.Protected_Entry_Index (I), | |
2800 | -- P, | |
2801 | -- D, | |
2802 | -- M, | |
2803 | -- F); | |
2804 | -- end _Disp_Timed_Select; | |
2805 | ||
2806 | -- For task types, generate: | |
2807 | ||
2808 | -- procedure _Disp_Timed_Select | |
2809 | -- (T : in out <Typ>; | |
2810 | -- S : Integer; | |
2811 | -- P : System.Address; | |
2812 | -- D : Duration; | |
2813 | -- M : Integer; | |
2814 | -- C : out Ada.Tags.Prim_Op_Kind; | |
2815 | -- F : out Boolean) | |
2816 | -- is | |
2817 | -- I : Integer; | |
2818 | ||
2819 | -- begin | |
2820 | -- I := Ada.Tags.Get_Entry_Index (Ada.Tags.Tag (<Typ>VP), S); | |
2821 | -- System.Tasking.Rendezvous.Timed_Task_Entry_Call | |
2822 | -- (T._task_id, | |
2823 | -- System.Tasking.Task_Entry_Index (I), | |
2824 | -- P, | |
2825 | -- D, | |
2826 | -- M, | |
2827 | -- D); | |
2828 | -- end _Disp_Time_Select; | |
2829 | ||
76a1c25b | 2830 | function Make_Disp_Timed_Select_Body |
2831 | (Typ : Entity_Id) return Node_Id | |
2832 | is | |
2833 | Loc : constant Source_Ptr := Sloc (Typ); | |
2834 | Conc_Typ : Entity_Id := Empty; | |
2835 | Decls : constant List_Id := New_List; | |
2836 | DT_Ptr : Entity_Id; | |
acf97c11 | 2837 | Obj_Ref : Node_Id; |
76a1c25b | 2838 | Stmts : constant List_Id := New_List; |
2839 | ||
2840 | begin | |
68f95949 | 2841 | pragma Assert (not Restriction_Active (No_Dispatching_Calls)); |
2842 | ||
952af0b9 | 2843 | -- Null body is generated for interface types |
2844 | ||
76a1c25b | 2845 | if Is_Interface (Typ) then |
2846 | return | |
2847 | Make_Subprogram_Body (Loc, | |
2848 | Specification => | |
2849 | Make_Disp_Timed_Select_Spec (Typ), | |
2850 | Declarations => | |
2851 | New_List, | |
2852 | Handled_Statement_Sequence => | |
2853 | Make_Handled_Sequence_Of_Statements (Loc, | |
2854 | New_List (Make_Null_Statement (Loc)))); | |
2855 | end if; | |
2856 | ||
76a1c25b | 2857 | DT_Ptr := Node (First_Elmt (Access_Disp_Table (Typ))); |
2858 | ||
952af0b9 | 2859 | if Is_Concurrent_Record_Type (Typ) then |
2860 | Conc_Typ := Corresponding_Concurrent_Type (Typ); | |
76a1c25b | 2861 | |
2862 | -- Generate: | |
2863 | -- I : Integer; | |
2864 | ||
2865 | -- where I will be used to capture the entry index of the primitive | |
2866 | -- wrapper at position S. | |
2867 | ||
2868 | Append_To (Decls, | |
2869 | Make_Object_Declaration (Loc, | |
2870 | Defining_Identifier => | |
2871 | Make_Defining_Identifier (Loc, Name_uI), | |
2872 | Object_Definition => | |
2873 | New_Reference_To (Standard_Integer, Loc))); | |
76a1c25b | 2874 | |
952af0b9 | 2875 | -- Generate: |
2876 | -- C := Get_Prim_Op_Kind (tag! (<type>VP), S); | |
76a1c25b | 2877 | |
952af0b9 | 2878 | -- if C = POK_Procedure |
2879 | -- or else C = POK_Protected_Procedure | |
2880 | -- or else C = POK_Task_Procedure; | |
2881 | -- then | |
2882 | -- F := True; | |
2883 | -- return; | |
2884 | -- end if; | |
76a1c25b | 2885 | |
725a69d2 | 2886 | Build_Common_Dispatching_Select_Statements (Loc, DT_Ptr, Stmts); |
76a1c25b | 2887 | |
2888 | -- Generate: | |
952af0b9 | 2889 | -- I := Get_Entry_Index (tag! (<type>VP), S); |
76a1c25b | 2890 | |
2891 | -- I is the entry index and S is the dispatch table slot | |
2892 | ||
2893 | Append_To (Stmts, | |
2894 | Make_Assignment_Statement (Loc, | |
2895 | Name => | |
2896 | Make_Identifier (Loc, Name_uI), | |
2897 | Expression => | |
725a69d2 | 2898 | Make_Function_Call (Loc, |
cdb1c38f | 2899 | Name => |
2900 | New_Reference_To (RTE (RE_Get_Entry_Index), Loc), | |
2901 | Parameter_Associations => | |
2902 | New_List ( | |
2903 | Unchecked_Convert_To (RTE (RE_Tag), | |
2904 | New_Reference_To (DT_Ptr, Loc)), | |
2905 | Make_Identifier (Loc, Name_uS))))); | |
76a1c25b | 2906 | |
acf97c11 | 2907 | -- Protected case |
2908 | ||
76a1c25b | 2909 | if Ekind (Conc_Typ) = E_Protected_Type then |
2910 | ||
acf97c11 | 2911 | -- Build T._object'Access |
2912 | ||
2913 | Obj_Ref := | |
2914 | Make_Attribute_Reference (Loc, | |
2915 | Attribute_Name => Name_Unchecked_Access, | |
2916 | Prefix => | |
2917 | Make_Selected_Component (Loc, | |
2918 | Prefix => Make_Identifier (Loc, Name_uT), | |
2919 | Selector_Name => Make_Identifier (Loc, Name_uObject))); | |
2920 | ||
2921 | -- Normal case, No_Entry_Queue restriction not active. In this | |
2922 | -- case we generate: | |
2923 | ||
2924 | -- Timed_Protected_Entry_Call | |
2925 | -- (T._object'access, | |
cdb1c38f | 2926 | -- Protected_Entry_Index! (I), |
acf97c11 | 2927 | -- P, D, M, F); |
76a1c25b | 2928 | |
2929 | -- where T is the protected object, I is the entry index, P are | |
2930 | -- the wrapped parameters, D is the delay amount, M is the delay | |
2931 | -- mode and F is the status flag. | |
2932 | ||
acf97c11 | 2933 | case Corresponding_Runtime_Package (Conc_Typ) is |
2934 | when System_Tasking_Protected_Objects_Entries => | |
2935 | Append_To (Stmts, | |
2936 | Make_Procedure_Call_Statement (Loc, | |
2937 | Name => | |
2938 | New_Reference_To | |
2939 | (RTE (RE_Timed_Protected_Entry_Call), Loc), | |
2940 | Parameter_Associations => | |
2941 | New_List ( | |
2942 | Obj_Ref, | |
2943 | ||
2944 | Make_Unchecked_Type_Conversion (Loc, -- entry index | |
2945 | Subtype_Mark => | |
2946 | New_Reference_To | |
2947 | (RTE (RE_Protected_Entry_Index), Loc), | |
2948 | Expression => | |
2949 | Make_Identifier (Loc, Name_uI)), | |
76a1c25b | 2950 | |
acf97c11 | 2951 | Make_Identifier (Loc, Name_uP), -- parameter block |
2952 | Make_Identifier (Loc, Name_uD), -- delay | |
2953 | Make_Identifier (Loc, Name_uM), -- delay mode | |
2954 | Make_Identifier (Loc, Name_uF)))); -- status flag | |
76a1c25b | 2955 | |
acf97c11 | 2956 | when System_Tasking_Protected_Objects_Single_Entry => |
2957 | -- Generate: | |
76a1c25b | 2958 | |
acf97c11 | 2959 | -- Timed_Protected_Single_Entry_Call |
2960 | -- (T._object'access, P, D, M, F); | |
2961 | ||
2962 | -- where T is the protected object, P is the wrapped | |
2963 | -- parameters, D is the delay amount, M is the delay mode, F | |
2964 | -- is the status flag. | |
2965 | ||
2966 | Append_To (Stmts, | |
2967 | Make_Procedure_Call_Statement (Loc, | |
2968 | Name => | |
2969 | New_Reference_To | |
2970 | (RTE (RE_Timed_Protected_Single_Entry_Call), Loc), | |
2971 | Parameter_Associations => | |
2972 | New_List ( | |
2973 | Obj_Ref, | |
2974 | Make_Identifier (Loc, Name_uP), -- parameter block | |
2975 | Make_Identifier (Loc, Name_uD), -- delay | |
2976 | Make_Identifier (Loc, Name_uM), -- delay mode | |
2977 | Make_Identifier (Loc, Name_uF)))); -- status flag | |
2978 | ||
2979 | when others => | |
2980 | raise Program_Error; | |
2981 | end case; | |
2982 | ||
2983 | -- Task case | |
ee6ba406 | 2984 | |
ee6ba406 | 2985 | else |
76a1c25b | 2986 | pragma Assert (Ekind (Conc_Typ) = E_Task_Type); |
2987 | ||
2988 | -- Generate: | |
2989 | -- Timed_Task_Entry_Call ( | |
2990 | -- T._task_id, | |
cdb1c38f | 2991 | -- Task_Entry_Index! (I), |
76a1c25b | 2992 | -- P, |
2993 | -- D, | |
2994 | -- M, | |
2995 | -- F); | |
2996 | ||
2997 | -- where T is the task object, I is the entry index, P are the | |
2998 | -- wrapped parameters, D is the delay amount, M is the delay | |
2999 | -- mode and F is the status flag. | |
3000 | ||
3001 | Append_To (Stmts, | |
3002 | Make_Procedure_Call_Statement (Loc, | |
3003 | Name => | |
3004 | New_Reference_To (RTE (RE_Timed_Task_Entry_Call), Loc), | |
3005 | Parameter_Associations => | |
3006 | New_List ( | |
3007 | ||
3008 | Make_Selected_Component (Loc, -- T._task_id | |
3009 | Prefix => | |
3010 | Make_Identifier (Loc, Name_uT), | |
3011 | Selector_Name => | |
3012 | Make_Identifier (Loc, Name_uTask_Id)), | |
3013 | ||
3014 | Make_Unchecked_Type_Conversion (Loc, -- entry index | |
3015 | Subtype_Mark => | |
3016 | New_Reference_To (RTE (RE_Task_Entry_Index), Loc), | |
3017 | Expression => | |
3018 | Make_Identifier (Loc, Name_uI)), | |
3019 | ||
3020 | Make_Identifier (Loc, Name_uP), -- parameter block | |
3021 | Make_Identifier (Loc, Name_uD), -- delay | |
3022 | Make_Identifier (Loc, Name_uM), -- delay mode | |
3023 | Make_Identifier (Loc, Name_uF)))); -- status flag | |
ee6ba406 | 3024 | end if; |
76a1c25b | 3025 | end if; |
3026 | ||
3027 | return | |
3028 | Make_Subprogram_Body (Loc, | |
3029 | Specification => | |
3030 | Make_Disp_Timed_Select_Spec (Typ), | |
3031 | Declarations => | |
3032 | Decls, | |
3033 | Handled_Statement_Sequence => | |
3034 | Make_Handled_Sequence_Of_Statements (Loc, Stmts)); | |
3035 | end Make_Disp_Timed_Select_Body; | |
3036 | ||
3037 | --------------------------------- | |
3038 | -- Make_Disp_Timed_Select_Spec -- | |
3039 | --------------------------------- | |
3040 | ||
3041 | function Make_Disp_Timed_Select_Spec | |
3042 | (Typ : Entity_Id) return Node_Id | |
3043 | is | |
3044 | Loc : constant Source_Ptr := Sloc (Typ); | |
3045 | Def_Id : constant Node_Id := | |
3046 | Make_Defining_Identifier (Loc, | |
3047 | Name_uDisp_Timed_Select); | |
3048 | Params : constant List_Id := New_List; | |
ee6ba406 | 3049 | |
76a1c25b | 3050 | begin |
68f95949 | 3051 | pragma Assert (not Restriction_Active (No_Dispatching_Calls)); |
3052 | ||
725a69d2 | 3053 | -- T : in out Typ; -- Object parameter |
3054 | -- S : Integer; -- Primitive operation slot | |
3055 | -- P : Address; -- Wrapped parameters | |
3056 | -- D : Duration; -- Delay | |
3057 | -- M : Integer; -- Delay Mode | |
3058 | -- C : out Prim_Op_Kind; -- Call kind | |
3059 | -- F : out Boolean; -- Status flag | |
76a1c25b | 3060 | |
725a69d2 | 3061 | Append_List_To (Params, New_List ( |
3062 | ||
3063 | Make_Parameter_Specification (Loc, | |
3064 | Defining_Identifier => | |
3065 | Make_Defining_Identifier (Loc, Name_uT), | |
3066 | Parameter_Type => | |
3067 | New_Reference_To (Typ, Loc), | |
3068 | In_Present => True, | |
3069 | Out_Present => True), | |
3070 | ||
3071 | Make_Parameter_Specification (Loc, | |
3072 | Defining_Identifier => | |
3073 | Make_Defining_Identifier (Loc, Name_uS), | |
3074 | Parameter_Type => | |
3075 | New_Reference_To (Standard_Integer, Loc)), | |
3076 | ||
3077 | Make_Parameter_Specification (Loc, | |
3078 | Defining_Identifier => | |
3079 | Make_Defining_Identifier (Loc, Name_uP), | |
3080 | Parameter_Type => | |
3081 | New_Reference_To (RTE (RE_Address), Loc)), | |
76a1c25b | 3082 | |
76a1c25b | 3083 | Make_Parameter_Specification (Loc, |
3084 | Defining_Identifier => | |
3085 | Make_Defining_Identifier (Loc, Name_uD), | |
3086 | Parameter_Type => | |
725a69d2 | 3087 | New_Reference_To (Standard_Duration, Loc)), |
76a1c25b | 3088 | |
76a1c25b | 3089 | Make_Parameter_Specification (Loc, |
3090 | Defining_Identifier => | |
3091 | Make_Defining_Identifier (Loc, Name_uM), | |
3092 | Parameter_Type => | |
725a69d2 | 3093 | New_Reference_To (Standard_Integer, Loc)), |
ee6ba406 | 3094 | |
725a69d2 | 3095 | Make_Parameter_Specification (Loc, |
3096 | Defining_Identifier => | |
3097 | Make_Defining_Identifier (Loc, Name_uC), | |
3098 | Parameter_Type => | |
3099 | New_Reference_To (RTE (RE_Prim_Op_Kind), Loc), | |
3100 | Out_Present => True))); | |
ee6ba406 | 3101 | |
725a69d2 | 3102 | Append_To (Params, |
3103 | Make_Parameter_Specification (Loc, | |
3104 | Defining_Identifier => | |
3105 | Make_Defining_Identifier (Loc, Name_uF), | |
3106 | Parameter_Type => | |
3107 | New_Reference_To (Standard_Boolean, Loc), | |
3108 | Out_Present => True)); | |
ee6ba406 | 3109 | |
76a1c25b | 3110 | return |
3111 | Make_Procedure_Specification (Loc, | |
3112 | Defining_Unit_Name => Def_Id, | |
3113 | Parameter_Specifications => Params); | |
3114 | end Make_Disp_Timed_Select_Spec; | |
ee6ba406 | 3115 | |
76a1c25b | 3116 | ------------- |
3117 | -- Make_DT -- | |
3118 | ------------- | |
ee6ba406 | 3119 | |
725a69d2 | 3120 | -- The frontend supports two models for expanding dispatch tables |
3121 | -- associated with library-level defined tagged types: statically | |
3122 | -- and non-statically allocated dispatch tables. In the former case | |
3123 | -- the object containing the dispatch table is constant and it is | |
3124 | -- initialized by means of a positional aggregate. In the latter case, | |
3125 | -- the object containing the dispatch table is a variable which is | |
3126 | -- initialized by means of assignments. | |
3127 | ||
3128 | -- In case of locally defined tagged types, the object containing the | |
3129 | -- object containing the dispatch table is always a variable (instead | |
3130 | -- of a constant). This is currently required to give support to late | |
3131 | -- overriding of primitives. For example: | |
3132 | ||
3133 | -- procedure Example is | |
3134 | -- package Pkg is | |
3135 | -- type T1 is tagged null record; | |
3136 | -- procedure Prim (O : T1); | |
3137 | -- end Pkg; | |
3138 | ||
3139 | -- type T2 is new Pkg.T1 with null record; | |
3140 | -- procedure Prim (X : T2) is -- late overriding | |
3141 | -- begin | |
3142 | -- ... | |
3143 | -- ... | |
3144 | -- end; | |
952af0b9 | 3145 | |
17e14451 | 3146 | function Make_DT (Typ : Entity_Id; N : Node_Id := Empty) return List_Id is |
3147 | Loc : constant Source_Ptr := Sloc (Typ); | |
3148 | ||
725a69d2 | 3149 | Max_Predef_Prims : constant Int := |
3150 | UI_To_Int | |
3151 | (Intval | |
3152 | (Expression | |
17e14451 | 3153 | (Parent (RTE (RE_Max_Predef_Prims))))); |
3154 | ||
cc60bd16 | 3155 | DT_Decl : constant Elist_Id := New_Elmt_List; |
3156 | DT_Aggr : constant Elist_Id := New_Elmt_List; | |
3157 | -- Entities marked with attribute Is_Dispatch_Table_Entity | |
3158 | ||
17e14451 | 3159 | procedure Check_Premature_Freezing (Subp : Entity_Id; Typ : Entity_Id); |
3160 | -- Verify that all non-tagged types in the profile of a subprogram | |
3161 | -- are frozen at the point the subprogram is frozen. This enforces | |
3162 | -- the rule on RM 13.14 (14) as modified by AI05-019. At the point a | |
3163 | -- subprogram is frozen, enough must be known about it to build the | |
3164 | -- activation record for it, which requires at least that the size of | |
3165 | -- all parameters be known. Controlling arguments are by-reference, | |
3166 | -- and therefore the rule only applies to non-tagged types. | |
3167 | -- Typical violation of the rule involves an object declaration that | |
3168 | -- freezes a tagged type, when one of its primitive operations has a | |
3169 | -- type in its profile whose full view has not been analyzed yet. | |
725a69d2 | 3170 | |
f301a57b | 3171 | procedure Export_DT (Typ : Entity_Id; DT : Entity_Id; Index : Nat := 0); |
3172 | -- Export the dispatch table DT of tagged type Typ. Required to generate | |
3173 | -- forward references and statically allocate the table. For primary | |
3174 | -- dispatch tables Index is 0; for secondary dispatch tables the value | |
3175 | -- of index must match the Suffix_Index value assigned to the table by | |
3176 | -- Make_Tags when generating its unique external name, and it is used to | |
3177 | -- retrieve from the Dispatch_Table_Wrappers list associated with Typ | |
3178 | -- the external name generated by Import_DT. | |
24971415 | 3179 | |
725a69d2 | 3180 | procedure Make_Secondary_DT |
acf97c11 | 3181 | (Typ : Entity_Id; |
3182 | Iface : Entity_Id; | |
f301a57b | 3183 | Suffix_Index : Int; |
acf97c11 | 3184 | Num_Iface_Prims : Nat; |
3185 | Iface_DT_Ptr : Entity_Id; | |
3186 | Predef_Prims_Ptr : Entity_Id; | |
3187 | Build_Thunks : Boolean; | |
3188 | Result : List_Id); | |
cdb1c38f | 3189 | -- Ada 2005 (AI-251): Expand the declarations for a Secondary Dispatch |
3190 | -- Table of Typ associated with Iface. Each abstract interface of Typ | |
3191 | -- has two secondary dispatch tables: one containing pointers to thunks | |
3192 | -- and another containing pointers to the primitives covering the | |
3193 | -- interface primitives. The former secondary table is generated when | |
3194 | -- Build_Thunks is True, and provides common support for dispatching | |
3195 | -- calls through interface types; the latter secondary table is | |
3196 | -- generated when Build_Thunks is False, and provides support for | |
3197 | -- Generic Dispatching Constructors that dispatch calls through | |
f301a57b | 3198 | -- interface types. When constructing this latter table the value |
3199 | -- of Suffix_Index is -1 to indicate that there is no need to export | |
3200 | -- such table when building statically allocated dispatch tables; a | |
3201 | -- positive value of Suffix_Index must match the Suffix_Index value | |
3202 | -- assigned to this secondary dispatch table by Make_Tags when its | |
3203 | -- unique external name was generated. | |
9dfe12ae | 3204 | |
17e14451 | 3205 | ------------------------------ |
3206 | -- Check_Premature_Freezing -- | |
3207 | ------------------------------ | |
3208 | ||
3209 | procedure Check_Premature_Freezing (Subp : Entity_Id; Typ : Entity_Id) is | |
3210 | begin | |
3211 | if Present (N) | |
3212 | and then Is_Private_Type (Typ) | |
3213 | and then No (Full_View (Typ)) | |
3214 | and then not Is_Generic_Type (Typ) | |
3215 | and then not Is_Tagged_Type (Typ) | |
3216 | and then not Is_Frozen (Typ) | |
3217 | then | |
3218 | Error_Msg_Sloc := Sloc (Subp); | |
3219 | Error_Msg_NE | |
3220 | ("declaration must appear after completion of type &", N, Typ); | |
3221 | Error_Msg_NE | |
3222 | ("\which is an untagged type in the profile of" | |
3223 | & " primitive operation & declared#", | |
3224 | N, Subp); | |
3225 | end if; | |
3226 | end Check_Premature_Freezing; | |
3227 | ||
24971415 | 3228 | --------------- |
3229 | -- Export_DT -- | |
3230 | --------------- | |
3231 | ||
f301a57b | 3232 | procedure Export_DT (Typ : Entity_Id; DT : Entity_Id; Index : Nat := 0) |
3233 | is | |
3234 | Count : Nat; | |
3235 | Elmt : Elmt_Id; | |
3236 | ||
24971415 | 3237 | begin |
3238 | Set_Is_Statically_Allocated (DT); | |
3239 | Set_Is_True_Constant (DT); | |
3240 | Set_Is_Exported (DT); | |
3241 | ||
f301a57b | 3242 | Count := 0; |
3243 | Elmt := First_Elmt (Dispatch_Table_Wrappers (Typ)); | |
3244 | while Count /= Index loop | |
3245 | Next_Elmt (Elmt); | |
3246 | Count := Count + 1; | |
3247 | end loop; | |
3248 | ||
3249 | pragma Assert (Related_Type (Node (Elmt)) = Typ); | |
3250 | ||
3251 | Get_External_Name | |
3252 | (Entity => Node (Elmt), | |
3253 | Has_Suffix => True); | |
3254 | ||
24971415 | 3255 | Set_Interface_Name (DT, |
3256 | Make_String_Literal (Loc, | |
3257 | Strval => String_From_Name_Buffer)); | |
3258 | ||
3259 | -- Ensure proper Sprint output of this implicit importation | |
3260 | ||
3261 | Set_Is_Internal (DT); | |
3262 | Set_Is_Public (DT); | |
3263 | end Export_DT; | |
3264 | ||
725a69d2 | 3265 | ----------------------- |
3266 | -- Make_Secondary_DT -- | |
3267 | ----------------------- | |
ee6ba406 | 3268 | |
725a69d2 | 3269 | procedure Make_Secondary_DT |
acf97c11 | 3270 | (Typ : Entity_Id; |
3271 | Iface : Entity_Id; | |
f301a57b | 3272 | Suffix_Index : Int; |
acf97c11 | 3273 | Num_Iface_Prims : Nat; |
3274 | Iface_DT_Ptr : Entity_Id; | |
3275 | Predef_Prims_Ptr : Entity_Id; | |
3276 | Build_Thunks : Boolean; | |
3277 | Result : List_Id) | |
725a69d2 | 3278 | is |
3279 | Loc : constant Source_Ptr := Sloc (Typ); | |
f301a57b | 3280 | Exporting_Table : constant Boolean := |
3281 | Building_Static_DT (Typ) | |
3282 | and then Suffix_Index > 0; | |
725a69d2 | 3283 | Iface_DT : constant Entity_Id := |
f301a57b | 3284 | Make_Defining_Identifier (Loc, |
3285 | Chars => New_Internal_Name ('T')); | |
725a69d2 | 3286 | Name_Predef_Prims : constant Name_Id := New_Internal_Name ('R'); |
3287 | Predef_Prims : constant Entity_Id := | |
3288 | Make_Defining_Identifier (Loc, | |
f301a57b | 3289 | Chars => Name_Predef_Prims); |
725a69d2 | 3290 | DT_Constr_List : List_Id; |
3291 | DT_Aggr_List : List_Id; | |
3292 | Empty_DT : Boolean := False; | |
3293 | Nb_Predef_Prims : Nat := 0; | |
3294 | Nb_Prim : Nat; | |
3295 | New_Node : Node_Id; | |
3296 | OSD : Entity_Id; | |
3297 | OSD_Aggr_List : List_Id; | |
3298 | Pos : Nat; | |
3299 | Prim : Entity_Id; | |
3300 | Prim_Elmt : Elmt_Id; | |
3301 | Prim_Ops_Aggr_List : List_Id; | |
343d35dc | 3302 | |
725a69d2 | 3303 | begin |
17e14451 | 3304 | -- Handle cases in which we do not generate statically allocated |
3305 | -- dispatch tables. | |
343d35dc | 3306 | |
24971415 | 3307 | if not Building_Static_DT (Typ) then |
725a69d2 | 3308 | Set_Ekind (Predef_Prims, E_Variable); |
725a69d2 | 3309 | Set_Ekind (Iface_DT, E_Variable); |
343d35dc | 3310 | |
725a69d2 | 3311 | -- Statically allocated dispatch tables and related entities are |
3312 | -- constants. | |
343d35dc | 3313 | |
725a69d2 | 3314 | else |
3315 | Set_Ekind (Predef_Prims, E_Constant); | |
3316 | Set_Is_Statically_Allocated (Predef_Prims); | |
3317 | Set_Is_True_Constant (Predef_Prims); | |
343d35dc | 3318 | |
725a69d2 | 3319 | Set_Ekind (Iface_DT, E_Constant); |
3320 | Set_Is_Statically_Allocated (Iface_DT); | |
3321 | Set_Is_True_Constant (Iface_DT); | |
343d35dc | 3322 | end if; |
3323 | ||
f301a57b | 3324 | -- Calculate the number of slots of the dispatch table. If the number |
3325 | -- of primitives of Typ is 0 we reserve a dummy single entry for its | |
3326 | -- DT because at run-time the pointer to this dummy entry will be | |
3327 | -- used as the tag. | |
68f95949 | 3328 | |
cdb1c38f | 3329 | if Num_Iface_Prims = 0 then |
725a69d2 | 3330 | Empty_DT := True; |
3331 | Nb_Prim := 1; | |
cdb1c38f | 3332 | else |
3333 | Nb_Prim := Num_Iface_Prims; | |
725a69d2 | 3334 | end if; |
76a1c25b | 3335 | |
725a69d2 | 3336 | -- Generate: |
952af0b9 | 3337 | |
725a69d2 | 3338 | -- Predef_Prims : Address_Array (1 .. Default_Prim_Ops_Count) := |
3339 | -- (predef-prim-op-thunk-1'address, | |
3340 | -- predef-prim-op-thunk-2'address, | |
3341 | -- ... | |
3342 | -- predef-prim-op-thunk-n'address); | |
3343 | -- for Predef_Prims'Alignment use Address'Alignment | |
952af0b9 | 3344 | |
725a69d2 | 3345 | -- Stage 1: Calculate the number of predefined primitives |
76a1c25b | 3346 | |
24971415 | 3347 | if not Building_Static_DT (Typ) then |
725a69d2 | 3348 | Nb_Predef_Prims := Max_Predef_Prims; |
3349 | else | |
3350 | Prim_Elmt := First_Elmt (Primitive_Operations (Typ)); | |
3351 | while Present (Prim_Elmt) loop | |
3352 | Prim := Node (Prim_Elmt); | |
aad6babd | 3353 | |
725a69d2 | 3354 | if Is_Predefined_Dispatching_Operation (Prim) |
3355 | and then not Is_Abstract_Subprogram (Prim) | |
3356 | then | |
3357 | Pos := UI_To_Int (DT_Position (Prim)); | |
aad6babd | 3358 | |
725a69d2 | 3359 | if Pos > Nb_Predef_Prims then |
3360 | Nb_Predef_Prims := Pos; | |
3361 | end if; | |
3362 | end if; | |
aad6babd | 3363 | |
725a69d2 | 3364 | Next_Elmt (Prim_Elmt); |
3365 | end loop; | |
3366 | end if; | |
aad6babd | 3367 | |
725a69d2 | 3368 | -- Stage 2: Create the thunks associated with the predefined |
3369 | -- primitives and save their entity to fill the aggregate. | |
ee6ba406 | 3370 | |
725a69d2 | 3371 | declare |
3372 | Prim_Table : array (Nat range 1 .. Nb_Predef_Prims) of Entity_Id; | |
cc60bd16 | 3373 | Decl : Node_Id; |
725a69d2 | 3374 | Thunk_Id : Entity_Id; |
3375 | Thunk_Code : Node_Id; | |
aad6babd | 3376 | |
725a69d2 | 3377 | begin |
3378 | Prim_Ops_Aggr_List := New_List; | |
3379 | Prim_Table := (others => Empty); | |
aad6babd | 3380 | |
cdb1c38f | 3381 | if Building_Static_DT (Typ) then |
3382 | Prim_Elmt := First_Elmt (Primitive_Operations (Typ)); | |
3383 | while Present (Prim_Elmt) loop | |
3384 | Prim := Node (Prim_Elmt); | |
aad6babd | 3385 | |
cdb1c38f | 3386 | if Is_Predefined_Dispatching_Operation (Prim) |
3387 | and then not Is_Abstract_Subprogram (Prim) | |
3388 | and then not Present (Prim_Table | |
3389 | (UI_To_Int (DT_Position (Prim)))) | |
3390 | then | |
3391 | if not Build_Thunks then | |
3392 | Prim_Table (UI_To_Int (DT_Position (Prim))) := | |
3393 | Alias (Prim); | |
aad6babd | 3394 | |
cdb1c38f | 3395 | else |
3396 | while Present (Alias (Prim)) loop | |
3397 | Prim := Alias (Prim); | |
3398 | end loop; | |
3399 | ||
3400 | Expand_Interface_Thunk (Prim, Thunk_Id, Thunk_Code); | |
aad6babd | 3401 | |
cdb1c38f | 3402 | if Present (Thunk_Id) then |
3403 | Append_To (Result, Thunk_Code); | |
3404 | Prim_Table (UI_To_Int (DT_Position (Prim))) | |
3405 | := Thunk_Id; | |
3406 | end if; | |
3407 | end if; | |
725a69d2 | 3408 | end if; |
aad6babd | 3409 | |
cdb1c38f | 3410 | Next_Elmt (Prim_Elmt); |
3411 | end loop; | |
3412 | end if; | |
aad6babd | 3413 | |
725a69d2 | 3414 | for J in Prim_Table'Range loop |
3415 | if Present (Prim_Table (J)) then | |
3416 | New_Node := | |
cc60bd16 | 3417 | Unchecked_Convert_To (RTE (RE_Prim_Ptr), |
acf97c11 | 3418 | Make_Attribute_Reference (Loc, |
3419 | Prefix => New_Reference_To (Prim_Table (J), Loc), | |
3420 | Attribute_Name => Name_Unrestricted_Access)); | |
725a69d2 | 3421 | else |
cc60bd16 | 3422 | New_Node := Make_Null (Loc); |
725a69d2 | 3423 | end if; |
952af0b9 | 3424 | |
725a69d2 | 3425 | Append_To (Prim_Ops_Aggr_List, New_Node); |
3426 | end loop; | |
952af0b9 | 3427 | |
cc60bd16 | 3428 | New_Node := |
3429 | Make_Aggregate (Loc, | |
3430 | Expressions => Prim_Ops_Aggr_List); | |
3431 | ||
3432 | -- Remember aggregates initializing dispatch tables | |
3433 | ||
3434 | Append_Elmt (New_Node, DT_Aggr); | |
3435 | ||
3436 | Decl := | |
3437 | Make_Subtype_Declaration (Loc, | |
3438 | Defining_Identifier => | |
3439 | Make_Defining_Identifier (Loc, | |
3440 | New_Internal_Name ('S')), | |
3441 | Subtype_Indication => | |
3442 | New_Reference_To (RTE (RE_Address_Array), Loc)); | |
3443 | ||
3444 | Append_To (Result, Decl); | |
3445 | ||
725a69d2 | 3446 | Append_To (Result, |
3447 | Make_Object_Declaration (Loc, | |
3448 | Defining_Identifier => Predef_Prims, | |
24971415 | 3449 | Constant_Present => Building_Static_DT (Typ), |
725a69d2 | 3450 | Aliased_Present => True, |
cc60bd16 | 3451 | Object_Definition => New_Reference_To |
3452 | (Defining_Identifier (Decl), Loc), | |
3453 | Expression => New_Node)); | |
aad6babd | 3454 | |
725a69d2 | 3455 | Append_To (Result, |
3456 | Make_Attribute_Definition_Clause (Loc, | |
3457 | Name => New_Reference_To (Predef_Prims, Loc), | |
3458 | Chars => Name_Alignment, | |
3459 | Expression => | |
3460 | Make_Attribute_Reference (Loc, | |
3461 | Prefix => | |
3462 | New_Reference_To (RTE (RE_Integer_Address), Loc), | |
3463 | Attribute_Name => Name_Alignment))); | |
3464 | end; | |
aad6babd | 3465 | |
725a69d2 | 3466 | -- Generate |
76a1c25b | 3467 | |
725a69d2 | 3468 | -- OSD : Ada.Tags.Object_Specific_Data (Nb_Prims) := |
3469 | -- (OSD_Table => (1 => <value>, | |
3470 | -- ... | |
3471 | -- N => <value>)); | |
76a1c25b | 3472 | |
725a69d2 | 3473 | -- Iface_DT : Dispatch_Table (Nb_Prims) := |
3474 | -- ([ Signature => <sig-value> ], | |
3475 | -- Tag_Kind => <tag_kind-value>, | |
3476 | -- Predef_Prims => Predef_Prims'Address, | |
3477 | -- Offset_To_Top => 0, | |
3478 | -- OSD => OSD'Address, | |
3479 | -- Prims_Ptr => (prim-op-1'address, | |
3480 | -- prim-op-2'address, | |
3481 | -- ... | |
3482 | -- prim-op-n'address)); | |
f301a57b | 3483 | -- for Iface_DT'Alignment use Address'Alignment; |
76a1c25b | 3484 | |
725a69d2 | 3485 | -- Stage 3: Initialize the discriminant and the record components |
aad6babd | 3486 | |
725a69d2 | 3487 | DT_Constr_List := New_List; |
3488 | DT_Aggr_List := New_List; | |
343d35dc | 3489 | |
725a69d2 | 3490 | -- Nb_Prim. If the tagged type has no primitives we add a dummy |
3491 | -- slot whose address will be the tag of this type. | |
343d35dc | 3492 | |
725a69d2 | 3493 | if Nb_Prim = 0 then |
3494 | New_Node := Make_Integer_Literal (Loc, 1); | |
3495 | else | |
3496 | New_Node := Make_Integer_Literal (Loc, Nb_Prim); | |
3497 | end if; | |
343d35dc | 3498 | |
725a69d2 | 3499 | Append_To (DT_Constr_List, New_Node); |
3500 | Append_To (DT_Aggr_List, New_Copy (New_Node)); | |
343d35dc | 3501 | |
725a69d2 | 3502 | -- Signature |
343d35dc | 3503 | |
725a69d2 | 3504 | if RTE_Record_Component_Available (RE_Signature) then |
3505 | Append_To (DT_Aggr_List, | |
3506 | New_Reference_To (RTE (RE_Secondary_DT), Loc)); | |
3507 | end if; | |
343d35dc | 3508 | |
725a69d2 | 3509 | -- Tag_Kind |
343d35dc | 3510 | |
725a69d2 | 3511 | if RTE_Record_Component_Available (RE_Tag_Kind) then |
3512 | Append_To (DT_Aggr_List, Tagged_Kind (Typ)); | |
3513 | end if; | |
aad6babd | 3514 | |
725a69d2 | 3515 | -- Predef_Prims |
aad6babd | 3516 | |
725a69d2 | 3517 | Append_To (DT_Aggr_List, |
3518 | Make_Attribute_Reference (Loc, | |
3519 | Prefix => New_Reference_To (Predef_Prims, Loc), | |
3520 | Attribute_Name => Name_Address)); | |
aad6babd | 3521 | |
725a69d2 | 3522 | -- Note: The correct value of Offset_To_Top will be set by the init |
3523 | -- subprogram | |
aad6babd | 3524 | |
725a69d2 | 3525 | Append_To (DT_Aggr_List, Make_Integer_Literal (Loc, 0)); |
aad6babd | 3526 | |
725a69d2 | 3527 | -- Generate the Object Specific Data table required to dispatch calls |
3528 | -- through synchronized interfaces. | |
aad6babd | 3529 | |
725a69d2 | 3530 | if Empty_DT |
3531 | or else Is_Abstract_Type (Typ) | |
3532 | or else Is_Controlled (Typ) | |
3533 | or else Restriction_Active (No_Dispatching_Calls) | |
3534 | or else not Is_Limited_Type (Typ) | |
a652dd51 | 3535 | or else not Has_Interfaces (Typ) |
cdb1c38f | 3536 | or else not Build_Thunks |
38d2fa31 | 3537 | or else not RTE_Record_Component_Available (RE_OSD_Table) |
725a69d2 | 3538 | then |
3539 | -- No OSD table required | |
ee6ba406 | 3540 | |
725a69d2 | 3541 | Append_To (DT_Aggr_List, |
3542 | New_Reference_To (RTE (RE_Null_Address), Loc)); | |
d62940bf | 3543 | |
725a69d2 | 3544 | else |
3545 | OSD_Aggr_List := New_List; | |
d62940bf | 3546 | |
725a69d2 | 3547 | declare |
3548 | Prim_Table : array (Nat range 1 .. Nb_Prim) of Entity_Id; | |
3549 | Prim : Entity_Id; | |
3550 | Prim_Alias : Entity_Id; | |
3551 | Prim_Elmt : Elmt_Id; | |
3552 | E : Entity_Id; | |
3553 | Count : Nat := 0; | |
3554 | Pos : Nat; | |
d62940bf | 3555 | |
725a69d2 | 3556 | begin |
3557 | Prim_Table := (others => Empty); | |
3558 | Prim_Alias := Empty; | |
d62940bf | 3559 | |
725a69d2 | 3560 | Prim_Elmt := First_Elmt (Primitive_Operations (Typ)); |
3561 | while Present (Prim_Elmt) loop | |
3562 | Prim := Node (Prim_Elmt); | |
d62940bf | 3563 | |
a652dd51 | 3564 | if Present (Interface_Alias (Prim)) |
725a69d2 | 3565 | and then Find_Dispatching_Type |
a652dd51 | 3566 | (Interface_Alias (Prim)) = Iface |
725a69d2 | 3567 | then |
a652dd51 | 3568 | Prim_Alias := Interface_Alias (Prim); |
d62940bf | 3569 | |
725a69d2 | 3570 | E := Prim; |
3571 | while Present (Alias (E)) loop | |
3572 | E := Alias (E); | |
3573 | end loop; | |
68f95949 | 3574 | |
725a69d2 | 3575 | Pos := UI_To_Int (DT_Position (Prim_Alias)); |
68f95949 | 3576 | |
725a69d2 | 3577 | if Present (Prim_Table (Pos)) then |
3578 | pragma Assert (Prim_Table (Pos) = E); | |
3579 | null; | |
68f95949 | 3580 | |
725a69d2 | 3581 | else |
3582 | Prim_Table (Pos) := E; | |
3583 | ||
3584 | Append_To (OSD_Aggr_List, | |
3585 | Make_Component_Association (Loc, | |
3586 | Choices => New_List ( | |
3587 | Make_Integer_Literal (Loc, | |
3588 | DT_Position (Prim_Alias))), | |
3589 | Expression => | |
3590 | Make_Integer_Literal (Loc, | |
3591 | DT_Position (Alias (Prim))))); | |
3592 | ||
3593 | Count := Count + 1; | |
3594 | end if; | |
3595 | end if; | |
3596 | ||
3597 | Next_Elmt (Prim_Elmt); | |
3598 | end loop; | |
3599 | pragma Assert (Count = Nb_Prim); | |
3600 | end; | |
3601 | ||
3602 | OSD := Make_Defining_Identifier (Loc, New_Internal_Name ('I')); | |
3603 | ||
3604 | Append_To (Result, | |
3605 | Make_Object_Declaration (Loc, | |
3606 | Defining_Identifier => OSD, | |
3607 | Object_Definition => | |
3608 | Make_Subtype_Indication (Loc, | |
3609 | Subtype_Mark => | |
3610 | New_Reference_To (RTE (RE_Object_Specific_Data), Loc), | |
3611 | Constraint => | |
3612 | Make_Index_Or_Discriminant_Constraint (Loc, | |
3613 | Constraints => New_List ( | |
3614 | Make_Integer_Literal (Loc, Nb_Prim)))), | |
3615 | Expression => Make_Aggregate (Loc, | |
3616 | Component_Associations => New_List ( | |
3617 | Make_Component_Association (Loc, | |
3618 | Choices => New_List ( | |
3619 | New_Occurrence_Of | |
3620 | (RTE_Record_Component (RE_OSD_Num_Prims), Loc)), | |
3621 | Expression => | |
3622 | Make_Integer_Literal (Loc, Nb_Prim)), | |
3623 | ||
3624 | Make_Component_Association (Loc, | |
3625 | Choices => New_List ( | |
3626 | New_Occurrence_Of | |
3627 | (RTE_Record_Component (RE_OSD_Table), Loc)), | |
3628 | Expression => Make_Aggregate (Loc, | |
3629 | Component_Associations => OSD_Aggr_List)))))); | |
3630 | ||
17e14451 | 3631 | Append_To (Result, |
3632 | Make_Attribute_Definition_Clause (Loc, | |
3633 | Name => New_Reference_To (OSD, Loc), | |
3634 | Chars => Name_Alignment, | |
3635 | Expression => | |
3636 | Make_Attribute_Reference (Loc, | |
3637 | Prefix => | |
3638 | New_Reference_To (RTE (RE_Integer_Address), Loc), | |
3639 | Attribute_Name => Name_Alignment))); | |
3640 | ||
725a69d2 | 3641 | -- In secondary dispatch tables the Typeinfo component contains |
3642 | -- the address of the Object Specific Data (see a-tags.ads) | |
3643 | ||
3644 | Append_To (DT_Aggr_List, | |
3645 | Make_Attribute_Reference (Loc, | |
3646 | Prefix => New_Reference_To (OSD, Loc), | |
3647 | Attribute_Name => Name_Address)); | |
3648 | end if; | |
3649 | ||
3650 | -- Initialize the table of primitive operations | |
3651 | ||
3652 | Prim_Ops_Aggr_List := New_List; | |
3653 | ||
3654 | if Empty_DT then | |
cc60bd16 | 3655 | Append_To (Prim_Ops_Aggr_List, Make_Null (Loc)); |
725a69d2 | 3656 | |
3657 | elsif Is_Abstract_Type (Typ) | |
24971415 | 3658 | or else not Building_Static_DT (Typ) |
725a69d2 | 3659 | then |
3660 | for J in 1 .. Nb_Prim loop | |
cc60bd16 | 3661 | Append_To (Prim_Ops_Aggr_List, Make_Null (Loc)); |
725a69d2 | 3662 | end loop; |
3663 | ||
3664 | else | |
3665 | declare | |
3666 | Prim_Table : array (Nat range 1 .. Nb_Prim) of Entity_Id; | |
3667 | Pos : Nat; | |
3668 | Thunk_Code : Node_Id; | |
3669 | Thunk_Id : Entity_Id; | |
3670 | ||
3671 | begin | |
3672 | Prim_Table := (others => Empty); | |
3673 | ||
3674 | Prim_Elmt := First_Elmt (Primitive_Operations (Typ)); | |
3675 | while Present (Prim_Elmt) loop | |
3676 | Prim := Node (Prim_Elmt); | |
3677 | ||
3678 | if not Is_Predefined_Dispatching_Operation (Prim) | |
a652dd51 | 3679 | and then Present (Interface_Alias (Prim)) |
725a69d2 | 3680 | and then not Is_Abstract_Subprogram (Alias (Prim)) |
3681 | and then not Is_Imported (Alias (Prim)) | |
3682 | and then Find_Dispatching_Type | |
a652dd51 | 3683 | (Interface_Alias (Prim)) = Iface |
725a69d2 | 3684 | |
3685 | -- Generate the code of the thunk only if the abstract | |
3686 | -- interface type is not an immediate ancestor of | |
3687 | -- Tagged_Type; otherwise the DT associated with the | |
3688 | -- interface is the primary DT. | |
3689 | ||
a652dd51 | 3690 | and then not Is_Ancestor (Iface, Typ) |
725a69d2 | 3691 | then |
cdb1c38f | 3692 | if not Build_Thunks then |
725a69d2 | 3693 | Pos := |
a652dd51 | 3694 | UI_To_Int (DT_Position (Interface_Alias (Prim))); |
cdb1c38f | 3695 | Prim_Table (Pos) := Alias (Prim); |
3696 | else | |
3697 | Expand_Interface_Thunk (Prim, Thunk_Id, Thunk_Code); | |
725a69d2 | 3698 | |
cdb1c38f | 3699 | if Present (Thunk_Id) then |
3700 | Pos := | |
a652dd51 | 3701 | UI_To_Int (DT_Position (Interface_Alias (Prim))); |
cdb1c38f | 3702 | |
3703 | Prim_Table (Pos) := Thunk_Id; | |
3704 | Append_To (Result, Thunk_Code); | |
3705 | end if; | |
725a69d2 | 3706 | end if; |
3707 | end if; | |
3708 | ||
3709 | Next_Elmt (Prim_Elmt); | |
3710 | end loop; | |
3711 | ||
3712 | for J in Prim_Table'Range loop | |
3713 | if Present (Prim_Table (J)) then | |
3714 | New_Node := | |
cc60bd16 | 3715 | Unchecked_Convert_To (RTE (RE_Prim_Ptr), |
acf97c11 | 3716 | Make_Attribute_Reference (Loc, |
3717 | Prefix => New_Reference_To (Prim_Table (J), Loc), | |
3718 | Attribute_Name => Name_Unrestricted_Access)); | |
725a69d2 | 3719 | else |
cc60bd16 | 3720 | New_Node := Make_Null (Loc); |
725a69d2 | 3721 | end if; |
3722 | ||
3723 | Append_To (Prim_Ops_Aggr_List, New_Node); | |
3724 | end loop; | |
3725 | end; | |
3726 | end if; | |
3727 | ||
cc60bd16 | 3728 | New_Node := |
725a69d2 | 3729 | Make_Aggregate (Loc, |
cc60bd16 | 3730 | Expressions => Prim_Ops_Aggr_List); |
3731 | ||
3732 | Append_To (DT_Aggr_List, New_Node); | |
3733 | ||
3734 | -- Remember aggregates initializing dispatch tables | |
3735 | ||
3736 | Append_Elmt (New_Node, DT_Aggr); | |
725a69d2 | 3737 | |
f301a57b | 3738 | -- Note: Secondary dispatch tables cannot be declared constant |
3739 | -- because the component Offset_To_Top is currently initialized | |
3740 | -- by the IP routine. | |
3741 | ||
725a69d2 | 3742 | Append_To (Result, |
3743 | Make_Object_Declaration (Loc, | |
3744 | Defining_Identifier => Iface_DT, | |
3745 | Aliased_Present => True, | |
f301a57b | 3746 | Constant_Present => False, |
3747 | ||
725a69d2 | 3748 | Object_Definition => |
3749 | Make_Subtype_Indication (Loc, | |
3750 | Subtype_Mark => New_Reference_To | |
3751 | (RTE (RE_Dispatch_Table_Wrapper), Loc), | |
3752 | Constraint => Make_Index_Or_Discriminant_Constraint (Loc, | |
3753 | Constraints => DT_Constr_List)), | |
3754 | ||
f301a57b | 3755 | Expression => |
3756 | Make_Aggregate (Loc, | |
3757 | Expressions => DT_Aggr_List))); | |
725a69d2 | 3758 | |
17e14451 | 3759 | Append_To (Result, |
3760 | Make_Attribute_Definition_Clause (Loc, | |
3761 | Name => New_Reference_To (Iface_DT, Loc), | |
3762 | Chars => Name_Alignment, | |
f301a57b | 3763 | |
17e14451 | 3764 | Expression => |
3765 | Make_Attribute_Reference (Loc, | |
f301a57b | 3766 | Prefix => |
17e14451 | 3767 | New_Reference_To (RTE (RE_Integer_Address), Loc), |
3768 | Attribute_Name => Name_Alignment))); | |
3769 | ||
f301a57b | 3770 | if Exporting_Table then |
3771 | Export_DT (Typ, Iface_DT, Suffix_Index); | |
3772 | ||
725a69d2 | 3773 | -- Generate code to create the pointer to the dispatch table |
3774 | ||
f301a57b | 3775 | -- Iface_DT_Ptr : Tag := Tag!(DT.Prims_Ptr'Address); |
725a69d2 | 3776 | |
f301a57b | 3777 | -- Note: This declaration is not added here if the table is exported |
3778 | -- because in such case Make_Tags has already added this declaration. | |
3779 | ||
3780 | else | |
3781 | Append_To (Result, | |
3782 | Make_Object_Declaration (Loc, | |
3783 | Defining_Identifier => Iface_DT_Ptr, | |
3784 | Constant_Present => True, | |
3785 | ||
3786 | Object_Definition => | |
3787 | New_Reference_To (RTE (RE_Interface_Tag), Loc), | |
3788 | ||
3789 | Expression => | |
3790 | Unchecked_Convert_To (RTE (RE_Interface_Tag), | |
3791 | Make_Attribute_Reference (Loc, | |
3792 | Prefix => | |
3793 | Make_Selected_Component (Loc, | |
3794 | Prefix => New_Reference_To (Iface_DT, Loc), | |
3795 | Selector_Name => | |
3796 | New_Occurrence_Of | |
3797 | (RTE_Record_Component (RE_Prims_Ptr), Loc)), | |
3798 | Attribute_Name => Name_Address)))); | |
3799 | end if; | |
725a69d2 | 3800 | |
acf97c11 | 3801 | Append_To (Result, |
3802 | Make_Object_Declaration (Loc, | |
3803 | Defining_Identifier => Predef_Prims_Ptr, | |
3804 | Constant_Present => True, | |
f301a57b | 3805 | |
3806 | Object_Definition => | |
acf97c11 | 3807 | New_Reference_To (RTE (RE_Address), Loc), |
f301a57b | 3808 | |
3809 | Expression => | |
acf97c11 | 3810 | Make_Attribute_Reference (Loc, |
f301a57b | 3811 | Prefix => |
acf97c11 | 3812 | Make_Selected_Component (Loc, |
f301a57b | 3813 | Prefix => New_Reference_To (Iface_DT, Loc), |
3814 | Selector_Name => | |
3815 | New_Occurrence_Of | |
3816 | (RTE_Record_Component (RE_Predef_Prims), Loc)), | |
acf97c11 | 3817 | Attribute_Name => Name_Address))); |
3818 | ||
cc60bd16 | 3819 | -- Remember entities containing dispatch tables |
acf97c11 | 3820 | |
cc60bd16 | 3821 | Append_Elmt (Predef_Prims, DT_Decl); |
3822 | Append_Elmt (Iface_DT, DT_Decl); | |
725a69d2 | 3823 | end Make_Secondary_DT; |
3824 | ||
3825 | -- Local variables | |
3826 | ||
2ea346ac | 3827 | Elab_Code : constant List_Id := New_List; |
3828 | Result : constant List_Id := New_List; | |
3829 | Tname : constant Name_Id := Chars (Typ); | |
725a69d2 | 3830 | AI : Elmt_Id; |
cdb1c38f | 3831 | AI_Tag_Elmt : Elmt_Id; |
24971415 | 3832 | AI_Tag_Comp : Elmt_Id; |
f9162257 | 3833 | DT_Aggr_List : List_Id; |
24971415 | 3834 | DT_Constr_List : List_Id; |
725a69d2 | 3835 | DT_Ptr : Entity_Id; |
725a69d2 | 3836 | ITable : Node_Id; |
3837 | I_Depth : Nat := 0; | |
3838 | Iface_Table_Node : Node_Id; | |
3839 | Name_ITable : Name_Id; | |
725a69d2 | 3840 | Nb_Predef_Prims : Nat := 0; |
3841 | Nb_Prim : Nat := 0; | |
3842 | New_Node : Node_Id; | |
725a69d2 | 3843 | Num_Ifaces : Nat := 0; |
cc60bd16 | 3844 | Parent_Typ : Entity_Id; |
725a69d2 | 3845 | Prim : Entity_Id; |
3846 | Prim_Elmt : Elmt_Id; | |
3847 | Prim_Ops_Aggr_List : List_Id; | |
725a69d2 | 3848 | Suffix_Index : Int; |
3849 | Typ_Comps : Elist_Id; | |
3850 | Typ_Ifaces : Elist_Id; | |
3851 | TSD_Aggr_List : List_Id; | |
3852 | TSD_Tags_List : List_Id; | |
17e14451 | 3853 | |
3854 | -- The following name entries are used by Make_DT to generate a number | |
3855 | -- of entities related to a tagged type. These entities may be generated | |
3856 | -- in a scope other than that of the tagged type declaration, and if | |
3857 | -- the entities for two tagged types with the same name happen to be | |
3858 | -- generated in the same scope, we have to take care to use different | |
3859 | -- names. This is achieved by means of a unique serial number appended | |
3860 | -- to each generated entity name. | |
3861 | ||
3862 | Name_DT : constant Name_Id := | |
3863 | New_External_Name (Tname, 'T', Suffix_Index => -1); | |
3864 | Name_Exname : constant Name_Id := | |
3865 | New_External_Name (Tname, 'E', Suffix_Index => -1); | |
e7e688dd | 3866 | Name_HT_Link : constant Name_Id := |
3867 | New_External_Name (Tname, 'H', Suffix_Index => -1); | |
17e14451 | 3868 | Name_Predef_Prims : constant Name_Id := |
3869 | New_External_Name (Tname, 'R', Suffix_Index => -1); | |
3870 | Name_SSD : constant Name_Id := | |
3871 | New_External_Name (Tname, 'S', Suffix_Index => -1); | |
3872 | Name_TSD : constant Name_Id := | |
3873 | New_External_Name (Tname, 'B', Suffix_Index => -1); | |
3874 | ||
3875 | -- Entities built with above names | |
3876 | ||
3877 | DT : constant Entity_Id := | |
3878 | Make_Defining_Identifier (Loc, Name_DT); | |
3879 | Exname : constant Entity_Id := | |
3880 | Make_Defining_Identifier (Loc, Name_Exname); | |
e7e688dd | 3881 | HT_Link : constant Entity_Id := |
3882 | Make_Defining_Identifier (Loc, Name_HT_Link); | |
17e14451 | 3883 | Predef_Prims : constant Entity_Id := |
3884 | Make_Defining_Identifier (Loc, Name_Predef_Prims); | |
3885 | SSD : constant Entity_Id := | |
3886 | Make_Defining_Identifier (Loc, Name_SSD); | |
3887 | TSD : constant Entity_Id := | |
3888 | Make_Defining_Identifier (Loc, Name_TSD); | |
725a69d2 | 3889 | |
3890 | -- Start of processing for Make_DT | |
3891 | ||
3892 | begin | |
17e14451 | 3893 | pragma Assert (Is_Frozen (Typ)); |
725a69d2 | 3894 | |
17e14451 | 3895 | -- Handle cases in which there is no need to build the dispatch table |
725a69d2 | 3896 | |
17e14451 | 3897 | if Has_Dispatch_Table (Typ) |
3898 | or else No (Access_Disp_Table (Typ)) | |
3899 | or else Is_CPP_Class (Typ) | |
3900 | then | |
725a69d2 | 3901 | return Result; |
725a69d2 | 3902 | |
17e14451 | 3903 | elsif No_Run_Time_Mode then |
3904 | Error_Msg_CRT ("tagged types", Typ); | |
3905 | return Result; | |
725a69d2 | 3906 | |
17e14451 | 3907 | elsif not RTE_Available (RE_Tag) then |
725a69d2 | 3908 | Append_To (Result, |
3909 | Make_Object_Declaration (Loc, | |
17e14451 | 3910 | Defining_Identifier => Node (First_Elmt |
3911 | (Access_Disp_Table (Typ))), | |
725a69d2 | 3912 | Object_Definition => New_Reference_To (RTE (RE_Tag), Loc), |
3913 | Constant_Present => True, | |
3914 | Expression => | |
24971415 | 3915 | Unchecked_Convert_To (RTE (RE_Tag), |
725a69d2 | 3916 | New_Reference_To (RTE (RE_Null_Address), Loc)))); |
3917 | ||
3918 | Analyze_List (Result, Suppress => All_Checks); | |
3919 | Error_Msg_CRT ("tagged types", Typ); | |
3920 | return Result; | |
3921 | end if; | |
3922 | ||
17e14451 | 3923 | -- Ensure that the value of Max_Predef_Prims defined in a-tags is |
cdb1c38f | 3924 | -- correct. Valid values are 10 under configurable runtime or 16 |
17e14451 | 3925 | -- with full runtime. |
3926 | ||
3927 | if RTE_Available (RE_Interface_Data) then | |
cdb1c38f | 3928 | if Max_Predef_Prims /= 16 then |
17e14451 | 3929 | Error_Msg_N ("run-time library configuration error", Typ); |
3930 | return Result; | |
3931 | end if; | |
725a69d2 | 3932 | else |
17e14451 | 3933 | if Max_Predef_Prims /= 10 then |
3934 | Error_Msg_N ("run-time library configuration error", Typ); | |
3935 | Error_Msg_CRT ("tagged types", Typ); | |
3936 | return Result; | |
3937 | end if; | |
725a69d2 | 3938 | end if; |
3939 | ||
cc60bd16 | 3940 | -- Initialize Parent_Typ handling private types |
3941 | ||
3942 | Parent_Typ := Etype (Typ); | |
3943 | ||
3944 | if Present (Full_View (Parent_Typ)) then | |
3945 | Parent_Typ := Full_View (Parent_Typ); | |
3946 | end if; | |
3947 | ||
17e14451 | 3948 | -- Ensure that all the primitives are frozen. This is only required when |
3949 | -- building static dispatch tables --- the primitives must be frozen to | |
3950 | -- be referenced (otherwise we have problems with the backend). It is | |
3951 | -- not a requirement with nonstatic dispatch tables because in this case | |
3952 | -- we generate now an empty dispatch table; the extra code required to | |
24971415 | 3953 | -- register the primitives in the slots will be generated later --- when |
17e14451 | 3954 | -- each primitive is frozen (see Freeze_Subprogram). |
725a69d2 | 3955 | |
24971415 | 3956 | if Building_Static_DT (Typ) |
17e14451 | 3957 | and then not Is_CPP_Class (Typ) |
3958 | then | |
3959 | declare | |
3960 | Save : constant Boolean := Freezing_Library_Level_Tagged_Type; | |
555c63a6 | 3961 | Prim : Entity_Id; |
17e14451 | 3962 | Prim_Elmt : Elmt_Id; |
3963 | Frnodes : List_Id; | |
725a69d2 | 3964 | |
17e14451 | 3965 | begin |
3966 | Freezing_Library_Level_Tagged_Type := True; | |
555c63a6 | 3967 | |
17e14451 | 3968 | Prim_Elmt := First_Elmt (Primitive_Operations (Typ)); |
3969 | while Present (Prim_Elmt) loop | |
555c63a6 | 3970 | Prim := Node (Prim_Elmt); |
3971 | Frnodes := Freeze_Entity (Prim, Loc); | |
725a69d2 | 3972 | |
17e14451 | 3973 | declare |
17e14451 | 3974 | F : Entity_Id; |
725a69d2 | 3975 | |
17e14451 | 3976 | begin |
555c63a6 | 3977 | F := First_Formal (Prim); |
17e14451 | 3978 | while Present (F) loop |
555c63a6 | 3979 | Check_Premature_Freezing (Prim, Etype (F)); |
17e14451 | 3980 | Next_Formal (F); |
3981 | end loop; | |
3982 | ||
555c63a6 | 3983 | Check_Premature_Freezing (Prim, Etype (Prim)); |
17e14451 | 3984 | end; |
3985 | ||
3986 | if Present (Frnodes) then | |
3987 | Append_List_To (Result, Frnodes); | |
3988 | end if; | |
3989 | ||
3990 | Next_Elmt (Prim_Elmt); | |
3991 | end loop; | |
555c63a6 | 3992 | |
17e14451 | 3993 | Freezing_Library_Level_Tagged_Type := Save; |
3994 | end; | |
3995 | end if; | |
725a69d2 | 3996 | |
17e14451 | 3997 | -- Ada 2005 (AI-251): Build the secondary dispatch tables |
3998 | ||
a652dd51 | 3999 | if Has_Interfaces (Typ) then |
17e14451 | 4000 | Collect_Interface_Components (Typ, Typ_Comps); |
4001 | ||
f301a57b | 4002 | -- Each secondary dispatch table is assigned an unique positive |
4003 | -- suffix index; such value also corresponds with the location of | |
4004 | -- its entity in the Dispatch_Table_Wrappers list (see Make_Tags). | |
4005 | ||
4006 | -- Note: This value must be kept sync with the Suffix_Index values | |
4007 | -- generated by Make_Tags | |
4008 | ||
4009 | Suffix_Index := 1; | |
acf97c11 | 4010 | AI_Tag_Elmt := |
4011 | Next_Elmt (Next_Elmt (First_Elmt (Access_Disp_Table (Typ)))); | |
17e14451 | 4012 | |
4013 | AI_Tag_Comp := First_Elmt (Typ_Comps); | |
4014 | while Present (AI_Tag_Comp) loop | |
cdb1c38f | 4015 | |
4016 | -- Build the secondary table containing pointers to thunks | |
4017 | ||
17e14451 | 4018 | Make_Secondary_DT |
cdb1c38f | 4019 | (Typ => Typ, |
4020 | Iface => Base_Type (Related_Type (Node (AI_Tag_Comp))), | |
f301a57b | 4021 | Suffix_Index => Suffix_Index, |
cdb1c38f | 4022 | Num_Iface_Prims => UI_To_Int |
4023 | (DT_Entry_Count (Node (AI_Tag_Comp))), | |
4024 | Iface_DT_Ptr => Node (AI_Tag_Elmt), | |
acf97c11 | 4025 | Predef_Prims_Ptr => Node (Next_Elmt (AI_Tag_Elmt)), |
cdb1c38f | 4026 | Build_Thunks => True, |
4027 | Result => Result); | |
cdb1c38f | 4028 | |
f301a57b | 4029 | -- Skip secondary dispatch table and secondary dispatch table of |
4030 | -- predefined primitives | |
acf97c11 | 4031 | |
f301a57b | 4032 | Next_Elmt (AI_Tag_Elmt); |
acf97c11 | 4033 | Next_Elmt (AI_Tag_Elmt); |
4034 | ||
36b938a3 | 4035 | -- Build the secondary table containing pointers to primitives |
cdb1c38f | 4036 | -- (used to give support to Generic Dispatching Constructors). |
4037 | ||
4038 | Make_Secondary_DT | |
4039 | (Typ => Typ, | |
4040 | Iface => Base_Type (Related_Type (Node (AI_Tag_Comp))), | |
f301a57b | 4041 | Suffix_Index => -1, |
cdb1c38f | 4042 | Num_Iface_Prims => UI_To_Int |
4043 | (DT_Entry_Count (Node (AI_Tag_Comp))), | |
4044 | Iface_DT_Ptr => Node (AI_Tag_Elmt), | |
acf97c11 | 4045 | Predef_Prims_Ptr => Node (Next_Elmt (AI_Tag_Elmt)), |
cdb1c38f | 4046 | Build_Thunks => False, |
4047 | Result => Result); | |
725a69d2 | 4048 | |
f301a57b | 4049 | -- Skip secondary dispatch table and secondary dispatch table of |
4050 | -- predefined primitives | |
acf97c11 | 4051 | |
f301a57b | 4052 | Next_Elmt (AI_Tag_Elmt); |
acf97c11 | 4053 | Next_Elmt (AI_Tag_Elmt); |
4054 | ||
17e14451 | 4055 | Suffix_Index := Suffix_Index + 1; |
17e14451 | 4056 | Next_Elmt (AI_Tag_Comp); |
4057 | end loop; | |
4058 | end if; | |
725a69d2 | 4059 | |
24971415 | 4060 | -- Get the _tag entity and the number of primitives of its dispatch |
4061 | -- table. | |
725a69d2 | 4062 | |
24971415 | 4063 | DT_Ptr := Node (First_Elmt (Access_Disp_Table (Typ))); |
4064 | Nb_Prim := UI_To_Int (DT_Entry_Count (First_Tag_Component (Typ))); | |
725a69d2 | 4065 | |
2ea346ac | 4066 | Set_Is_Statically_Allocated (DT, Is_Library_Level_Tagged_Type (Typ)); |
4067 | Set_Is_Statically_Allocated (SSD, Is_Library_Level_Tagged_Type (Typ)); | |
4068 | Set_Is_Statically_Allocated (TSD, Is_Library_Level_Tagged_Type (Typ)); | |
4069 | Set_Is_Statically_Allocated (Predef_Prims, | |
4070 | Is_Library_Level_Tagged_Type (Typ)); | |
725a69d2 | 4071 | |
4072 | -- In case of locally defined tagged type we declare the object | |
36b938a3 | 4073 | -- containing the dispatch table by means of a variable. Its |
725a69d2 | 4074 | -- initialization is done later by means of an assignment. This is |
4075 | -- required to generate its External_Tag. | |
4076 | ||
24971415 | 4077 | if not Building_Static_DT (Typ) then |
725a69d2 | 4078 | |
4079 | -- Generate: | |
4080 | -- DT : No_Dispatch_Table_Wrapper; | |
17e14451 | 4081 | -- for DT'Alignment use Address'Alignment; |
725a69d2 | 4082 | -- DT_Ptr : Tag := !Tag (DT.NDT_Prims_Ptr'Address); |
4083 | ||
24971415 | 4084 | if not Has_DT (Typ) then |
725a69d2 | 4085 | Append_To (Result, |
4086 | Make_Object_Declaration (Loc, | |
4087 | Defining_Identifier => DT, | |
4088 | Aliased_Present => True, | |
4089 | Constant_Present => False, | |
4090 | Object_Definition => | |
4091 | New_Reference_To | |
4092 | (RTE (RE_No_Dispatch_Table_Wrapper), Loc))); | |
4093 | ||
17e14451 | 4094 | Append_To (Result, |
4095 | Make_Attribute_Definition_Clause (Loc, | |
4096 | Name => New_Reference_To (DT, Loc), | |
4097 | Chars => Name_Alignment, | |
4098 | Expression => | |
4099 | Make_Attribute_Reference (Loc, | |
4100 | Prefix => | |
4101 | New_Reference_To (RTE (RE_Integer_Address), Loc), | |
4102 | Attribute_Name => Name_Alignment))); | |
4103 | ||
725a69d2 | 4104 | Append_To (Result, |
4105 | Make_Object_Declaration (Loc, | |
4106 | Defining_Identifier => DT_Ptr, | |
4107 | Object_Definition => New_Reference_To (RTE (RE_Tag), Loc), | |
4108 | Constant_Present => True, | |
4109 | Expression => | |
24971415 | 4110 | Unchecked_Convert_To (RTE (RE_Tag), |
725a69d2 | 4111 | Make_Attribute_Reference (Loc, |
4112 | Prefix => | |
4113 | Make_Selected_Component (Loc, | |
4114 | Prefix => New_Reference_To (DT, Loc), | |
4115 | Selector_Name => | |
4116 | New_Occurrence_Of | |
4117 | (RTE_Record_Component (RE_NDT_Prims_Ptr), Loc)), | |
4118 | Attribute_Name => Name_Address)))); | |
4119 | ||
4120 | -- Generate: | |
4121 | -- DT : Dispatch_Table_Wrapper (Nb_Prim); | |
4122 | -- for DT'Alignment use Address'Alignment; | |
4123 | -- DT_Ptr : Tag := !Tag (DT.Prims_Ptr'Address); | |
4124 | ||
4125 | else | |
4126 | -- If the tagged type has no primitives we add a dummy slot | |
4127 | -- whose address will be the tag of this type. | |
4128 | ||
4129 | if Nb_Prim = 0 then | |
4130 | DT_Constr_List := | |
4131 | New_List (Make_Integer_Literal (Loc, 1)); | |
4132 | else | |
4133 | DT_Constr_List := | |
4134 | New_List (Make_Integer_Literal (Loc, Nb_Prim)); | |
4135 | end if; | |
4136 | ||
4137 | Append_To (Result, | |
4138 | Make_Object_Declaration (Loc, | |
4139 | Defining_Identifier => DT, | |
4140 | Aliased_Present => True, | |
4141 | Constant_Present => False, | |
4142 | Object_Definition => | |
4143 | Make_Subtype_Indication (Loc, | |
4144 | Subtype_Mark => | |
4145 | New_Reference_To (RTE (RE_Dispatch_Table_Wrapper), Loc), | |
4146 | Constraint => Make_Index_Or_Discriminant_Constraint (Loc, | |
4147 | Constraints => DT_Constr_List)))); | |
4148 | ||
4149 | Append_To (Result, | |
4150 | Make_Attribute_Definition_Clause (Loc, | |
4151 | Name => New_Reference_To (DT, Loc), | |
4152 | Chars => Name_Alignment, | |
4153 | Expression => | |
4154 | Make_Attribute_Reference (Loc, | |
4155 | Prefix => | |
4156 | New_Reference_To (RTE (RE_Integer_Address), Loc), | |
4157 | Attribute_Name => Name_Alignment))); | |
4158 | ||
4159 | Append_To (Result, | |
4160 | Make_Object_Declaration (Loc, | |
4161 | Defining_Identifier => DT_Ptr, | |
4162 | Object_Definition => New_Reference_To (RTE (RE_Tag), Loc), | |
4163 | Constant_Present => True, | |
4164 | Expression => | |
24971415 | 4165 | Unchecked_Convert_To (RTE (RE_Tag), |
725a69d2 | 4166 | Make_Attribute_Reference (Loc, |
4167 | Prefix => | |
4168 | Make_Selected_Component (Loc, | |
4169 | Prefix => New_Reference_To (DT, Loc), | |
4170 | Selector_Name => | |
4171 | New_Occurrence_Of | |
4172 | (RTE_Record_Component (RE_Prims_Ptr), Loc)), | |
4173 | Attribute_Name => Name_Address)))); | |
acf97c11 | 4174 | |
4175 | Append_To (Result, | |
4176 | Make_Object_Declaration (Loc, | |
4177 | Defining_Identifier => | |
4178 | Node (Next_Elmt (First_Elmt (Access_Disp_Table (Typ)))), | |
4179 | Constant_Present => True, | |
4180 | Object_Definition => New_Reference_To | |
4181 | (RTE (RE_Address), Loc), | |
4182 | Expression => | |
4183 | Make_Attribute_Reference (Loc, | |
4184 | Prefix => | |
4185 | Make_Selected_Component (Loc, | |
4186 | Prefix => New_Reference_To (DT, Loc), | |
4187 | Selector_Name => | |
4188 | New_Occurrence_Of | |
4189 | (RTE_Record_Component (RE_Predef_Prims), Loc)), | |
4190 | Attribute_Name => Name_Address))); | |
725a69d2 | 4191 | end if; |
4192 | end if; | |
4193 | ||
4194 | -- Generate: Exname : constant String := full_qualified_name (typ); | |
343d35dc | 4195 | -- The type itself may be an anonymous parent type, so use the first |
4196 | -- subtype to have a user-recognizable name. | |
d62940bf | 4197 | |
343d35dc | 4198 | Append_To (Result, |
4199 | Make_Object_Declaration (Loc, | |
4200 | Defining_Identifier => Exname, | |
4201 | Constant_Present => True, | |
4202 | Object_Definition => New_Reference_To (Standard_String, Loc), | |
4203 | Expression => | |
4204 | Make_String_Literal (Loc, | |
4205 | Full_Qualified_Name (First_Subtype (Typ))))); | |
d62940bf | 4206 | |
24971415 | 4207 | Set_Is_Statically_Allocated (Exname); |
4208 | Set_Is_True_Constant (Exname); | |
4209 | ||
e7e688dd | 4210 | -- Declare the object used by Ada.Tags.Register_Tag |
4211 | ||
4212 | if RTE_Available (RE_Register_Tag) then | |
4213 | Append_To (Result, | |
4214 | Make_Object_Declaration (Loc, | |
4215 | Defining_Identifier => HT_Link, | |
4216 | Object_Definition => New_Reference_To (RTE (RE_Tag), Loc))); | |
4217 | end if; | |
4218 | ||
725a69d2 | 4219 | -- Generate code to create the storage for the type specific data object |
4220 | -- with enough space to store the tags of the ancestors plus the tags | |
4221 | -- of all the implemented interfaces (as described in a-tags.adb). | |
4222 | ||
4223 | -- TSD : Type_Specific_Data (I_Depth) := | |
4224 | -- (Idepth => I_Depth, | |
4225 | -- Access_Level => Type_Access_Level (Typ), | |
4226 | -- Expanded_Name => Cstring_Ptr!(Exname'Address)) | |
4227 | -- External_Tag => Cstring_Ptr!(Exname'Address)) | |
e7e688dd | 4228 | -- HT_Link => HT_Link'Address, |
725a69d2 | 4229 | -- Transportable => <<boolean-value>>, |
4230 | -- RC_Offset => <<integer-value>>, | |
cc60bd16 | 4231 | -- [ Size_Func => Size_Prim'Access ] |
725a69d2 | 4232 | -- [ Interfaces_Table => <<access-value>> ] |
24971415 | 4233 | -- [ SSD => SSD_Table'Address ] |
725a69d2 | 4234 | -- Tags_Table => (0 => null, |
4235 | -- 1 => Parent'Tag | |
4236 | -- ...); | |
4237 | -- for TSD'Alignment use Address'Alignment | |
4238 | ||
4239 | TSD_Aggr_List := New_List; | |
4240 | ||
4241 | -- Idepth: Count ancestors to compute the inheritance depth. For private | |
4242 | -- extensions, always go to the full view in order to compute the real | |
4243 | -- inheritance depth. | |
4244 | ||
4245 | declare | |
4246 | Current_Typ : Entity_Id; | |
4247 | Parent_Typ : Entity_Id; | |
4248 | ||
4249 | begin | |
4250 | I_Depth := 0; | |
4251 | Current_Typ := Typ; | |
4252 | loop | |
4253 | Parent_Typ := Etype (Current_Typ); | |
4254 | ||
4255 | if Is_Private_Type (Parent_Typ) then | |
4256 | Parent_Typ := Full_View (Base_Type (Parent_Typ)); | |
4257 | end if; | |
4258 | ||
4259 | exit when Parent_Typ = Current_Typ; | |
4260 | ||
4261 | I_Depth := I_Depth + 1; | |
4262 | Current_Typ := Parent_Typ; | |
4263 | end loop; | |
4264 | end; | |
4265 | ||
4266 | Append_To (TSD_Aggr_List, | |
17e14451 | 4267 | Make_Integer_Literal (Loc, I_Depth)); |
725a69d2 | 4268 | |
4269 | -- Access_Level | |
4270 | ||
4271 | Append_To (TSD_Aggr_List, | |
17e14451 | 4272 | Make_Integer_Literal (Loc, Type_Access_Level (Typ))); |
725a69d2 | 4273 | |
4274 | -- Expanded_Name | |
4275 | ||
4276 | Append_To (TSD_Aggr_List, | |
17e14451 | 4277 | Unchecked_Convert_To (RTE (RE_Cstring_Ptr), |
4278 | Make_Attribute_Reference (Loc, | |
4279 | Prefix => New_Reference_To (Exname, Loc), | |
4280 | Attribute_Name => Name_Address))); | |
725a69d2 | 4281 | |
4282 | -- External_Tag of a local tagged type | |
4283 | ||
17e14451 | 4284 | -- <typ>A : constant String := |
725a69d2 | 4285 | -- "Internal tag at 16#tag-addr#: <full-name-of-typ>"; |
4286 | ||
4287 | -- The reason we generate this strange name is that we do not want to | |
4288 | -- enter local tagged types in the global hash table used to compute | |
4289 | -- the Internal_Tag attribute for two reasons: | |
4290 | ||
4291 | -- 1. It is hard to avoid a tasking race condition for entering the | |
4292 | -- entry into the hash table. | |
4293 | ||
4294 | -- 2. It would cause a storage leak, unless we rig up considerable | |
4295 | -- mechanism to remove the entry from the hash table on exit. | |
4296 | ||
4297 | -- So what we do is to generate the above external tag name, where the | |
4298 | -- hex address is the address of the local dispatch table (i.e. exactly | |
4299 | -- the value we want if Internal_Tag is computed from this string). | |
4300 | ||
4301 | -- Of course this value will only be valid if the tagged type is still | |
4302 | -- in scope, but it clearly must be erroneous to compute the internal | |
4303 | -- tag of a tagged type that is out of scope! | |
4304 | ||
17e14451 | 4305 | -- We don't do this processing if an explicit external tag has been |
4306 | -- specified. That's an odd case for which we have already issued a | |
4307 | -- warning, where we will not be able to compute the internal tag. | |
4308 | ||
4309 | if not Is_Library_Level_Entity (Typ) | |
4310 | and then not Has_External_Tag_Rep_Clause (Typ) | |
4311 | then | |
725a69d2 | 4312 | declare |
725a69d2 | 4313 | Exname : constant Entity_Id := |
17e14451 | 4314 | Make_Defining_Identifier (Loc, |
4315 | New_External_Name (Tname, 'A')); | |
4316 | ||
725a69d2 | 4317 | Full_Name : constant String_Id := |
4318 | Full_Qualified_Name (First_Subtype (Typ)); | |
4319 | Str1_Id : String_Id; | |
4320 | Str2_Id : String_Id; | |
725a69d2 | 4321 | |
4322 | begin | |
4323 | -- Generate: | |
17e14451 | 4324 | -- Str1 = "Internal tag at 16#"; |
725a69d2 | 4325 | |
4326 | Start_String; | |
4327 | Store_String_Chars ("Internal tag at 16#"); | |
4328 | Str1_Id := End_String; | |
4329 | ||
4330 | -- Generate: | |
17e14451 | 4331 | -- Str2 = "#: <type-full-name>"; |
725a69d2 | 4332 | |
4333 | Start_String; | |
4334 | Store_String_Chars ("#: "); | |
725a69d2 | 4335 | Store_String_Chars (Full_Name); |
17e14451 | 4336 | Str2_Id := End_String; |
725a69d2 | 4337 | |
4338 | -- Generate: | |
4339 | -- Exname : constant String := | |
17e14451 | 4340 | -- Str1 & Address_Image (Tag) & Str2; |
725a69d2 | 4341 | |
4342 | if RTE_Available (RE_Address_Image) then | |
4343 | Append_To (Result, | |
4344 | Make_Object_Declaration (Loc, | |
4345 | Defining_Identifier => Exname, | |
4346 | Constant_Present => True, | |
4347 | Object_Definition => New_Reference_To | |
4348 | (Standard_String, Loc), | |
4349 | Expression => | |
4350 | Make_Op_Concat (Loc, | |
4351 | Left_Opnd => | |
4352 | Make_String_Literal (Loc, Str1_Id), | |
4353 | Right_Opnd => | |
4354 | Make_Op_Concat (Loc, | |
4355 | Left_Opnd => | |
4356 | Make_Function_Call (Loc, | |
4357 | Name => | |
4358 | New_Reference_To | |
4359 | (RTE (RE_Address_Image), Loc), | |
4360 | Parameter_Associations => New_List ( | |
4361 | Unchecked_Convert_To (RTE (RE_Address), | |
4362 | New_Reference_To (DT_Ptr, Loc)))), | |
4363 | Right_Opnd => | |
17e14451 | 4364 | Make_String_Literal (Loc, Str2_Id))))); |
4365 | ||
725a69d2 | 4366 | else |
4367 | Append_To (Result, | |
4368 | Make_Object_Declaration (Loc, | |
4369 | Defining_Identifier => Exname, | |
4370 | Constant_Present => True, | |
4371 | Object_Definition => New_Reference_To | |
4372 | (Standard_String, Loc), | |
4373 | Expression => | |
4374 | Make_Op_Concat (Loc, | |
4375 | Left_Opnd => | |
4376 | Make_String_Literal (Loc, Str1_Id), | |
4377 | Right_Opnd => | |
17e14451 | 4378 | Make_String_Literal (Loc, Str2_Id)))); |
725a69d2 | 4379 | end if; |
4380 | ||
4381 | New_Node := | |
4382 | Unchecked_Convert_To (RTE (RE_Cstring_Ptr), | |
4383 | Make_Attribute_Reference (Loc, | |
4384 | Prefix => New_Reference_To (Exname, Loc), | |
4385 | Attribute_Name => Name_Address)); | |
4386 | end; | |
4387 | ||
4388 | -- External tag of a library-level tagged type: Check for a definition | |
4389 | -- of External_Tag. The clause is considered only if it applies to this | |
4390 | -- specific tagged type, as opposed to one of its ancestors. | |
cc60bd16 | 4391 | -- If the type is an unconstrained type extension, we are building the |
4392 | -- dispatch table of its anonymous base type, so the external tag, if | |
4393 | -- any was specified, must be retrieved from the first subtype. | |
725a69d2 | 4394 | |
4395 | else | |
4396 | declare | |
cc60bd16 | 4397 | Def : constant Node_Id := Get_Attribute_Definition_Clause |
4398 | (First_Subtype (Typ), | |
4399 | Attribute_External_Tag); | |
4400 | ||
725a69d2 | 4401 | Old_Val : String_Id; |
4402 | New_Val : String_Id; | |
4403 | E : Entity_Id; | |
4404 | ||
4405 | begin | |
4406 | if not Present (Def) | |
cc60bd16 | 4407 | or else Entity (Name (Def)) /= First_Subtype (Typ) |
725a69d2 | 4408 | then |
4409 | New_Node := | |
4410 | Unchecked_Convert_To (RTE (RE_Cstring_Ptr), | |
4411 | Make_Attribute_Reference (Loc, | |
cc60bd16 | 4412 | Prefix => New_Reference_To (Exname, Loc), |
725a69d2 | 4413 | Attribute_Name => Name_Address)); |
4414 | else | |
4415 | Old_Val := Strval (Expr_Value_S (Expression (Def))); | |
4416 | ||
17e14451 | 4417 | -- For the rep clause "for <typ>'external_tag use y" generate: |
725a69d2 | 4418 | |
17e14451 | 4419 | -- <typ>A : constant string := y; |
4420 | -- | |
4421 | -- <typ>A'Address is used to set the External_Tag component | |
4422 | -- of the TSD | |
725a69d2 | 4423 | |
4424 | -- Create a new nul terminated string if it is not already | |
4425 | ||
4426 | if String_Length (Old_Val) > 0 | |
4427 | and then | |
4428 | Get_String_Char (Old_Val, String_Length (Old_Val)) = 0 | |
4429 | then | |
4430 | New_Val := Old_Val; | |
4431 | else | |
4432 | Start_String (Old_Val); | |
4433 | Store_String_Char (Get_Char_Code (ASCII.NUL)); | |
4434 | New_Val := End_String; | |
4435 | end if; | |
4436 | ||
4437 | E := Make_Defining_Identifier (Loc, | |
4438 | New_External_Name (Chars (Typ), 'A')); | |
4439 | ||
4440 | Append_To (Result, | |
4441 | Make_Object_Declaration (Loc, | |
4442 | Defining_Identifier => E, | |
4443 | Constant_Present => True, | |
4444 | Object_Definition => | |
4445 | New_Reference_To (Standard_String, Loc), | |
4446 | Expression => | |
4447 | Make_String_Literal (Loc, New_Val))); | |
4448 | ||
4449 | New_Node := | |
4450 | Unchecked_Convert_To (RTE (RE_Cstring_Ptr), | |
4451 | Make_Attribute_Reference (Loc, | |
4452 | Prefix => New_Reference_To (E, Loc), | |
4453 | Attribute_Name => Name_Address)); | |
4454 | end if; | |
4455 | end; | |
4456 | end if; | |
4457 | ||
17e14451 | 4458 | Append_To (TSD_Aggr_List, New_Node); |
725a69d2 | 4459 | |
4460 | -- HT_Link | |
4461 | ||
e7e688dd | 4462 | if RTE_Available (RE_Register_Tag) then |
4463 | Append_To (TSD_Aggr_List, | |
4464 | Unchecked_Convert_To (RTE (RE_Tag_Ptr), | |
4465 | Make_Attribute_Reference (Loc, | |
4466 | Prefix => New_Reference_To (HT_Link, Loc), | |
4467 | Attribute_Name => Name_Address))); | |
4468 | else | |
4469 | Append_To (TSD_Aggr_List, | |
4470 | Unchecked_Convert_To (RTE (RE_Tag_Ptr), | |
4471 | New_Reference_To (RTE (RE_Null_Address), Loc))); | |
4472 | end if; | |
725a69d2 | 4473 | |
4474 | -- Transportable: Set for types that can be used in remote calls | |
4475 | -- with respect to E.4(18) legality rules. | |
4476 | ||
17e14451 | 4477 | declare |
4478 | Transportable : Entity_Id; | |
725a69d2 | 4479 | |
17e14451 | 4480 | begin |
4481 | Transportable := | |
4482 | Boolean_Literals | |
4483 | (Is_Pure (Typ) | |
4484 | or else Is_Shared_Passive (Typ) | |
4485 | or else | |
4486 | ((Is_Remote_Types (Typ) | |
4487 | or else Is_Remote_Call_Interface (Typ)) | |
4488 | and then Original_View_In_Visible_Part (Typ)) | |
4489 | or else not Comes_From_Source (Typ)); | |
4490 | ||
4491 | Append_To (TSD_Aggr_List, | |
4492 | New_Occurrence_Of (Transportable, Loc)); | |
4493 | end; | |
725a69d2 | 4494 | |
4495 | -- RC_Offset: These are the valid values and their meaning: | |
4496 | ||
343d35dc | 4497 | -- >0: For simple types with controlled components is |
4498 | -- type._record_controller'position | |
725a69d2 | 4499 | |
343d35dc | 4500 | -- 0: For types with no controlled components |
725a69d2 | 4501 | |
343d35dc | 4502 | -- -1: For complex types with controlled components where the position |
4503 | -- of the record controller is not statically computable but there | |
4504 | -- are controlled components at this level. The _Controller field | |
4505 | -- is available right after the _parent. | |
725a69d2 | 4506 | |
343d35dc | 4507 | -- -2: There are no controlled components at this level. We need to |
4508 | -- get the position from the parent. | |
952af0b9 | 4509 | |
17e14451 | 4510 | declare |
4511 | RC_Offset_Node : Node_Id; | |
343d35dc | 4512 | |
17e14451 | 4513 | begin |
4514 | if not Has_Controlled_Component (Typ) then | |
4515 | RC_Offset_Node := Make_Integer_Literal (Loc, 0); | |
4516 | ||
4517 | elsif Etype (Typ) /= Typ | |
cdb1c38f | 4518 | and then Has_Discriminants (Parent_Typ) |
17e14451 | 4519 | then |
4520 | if Has_New_Controlled_Component (Typ) then | |
4521 | RC_Offset_Node := Make_Integer_Literal (Loc, -1); | |
4522 | else | |
4523 | RC_Offset_Node := Make_Integer_Literal (Loc, -2); | |
4524 | end if; | |
343d35dc | 4525 | else |
17e14451 | 4526 | RC_Offset_Node := |
4527 | Make_Attribute_Reference (Loc, | |
4528 | Prefix => | |
4529 | Make_Selected_Component (Loc, | |
4530 | Prefix => New_Reference_To (Typ, Loc), | |
4531 | Selector_Name => | |
4532 | New_Reference_To (Controller_Component (Typ), Loc)), | |
4533 | Attribute_Name => Name_Position); | |
4534 | ||
4535 | -- This is not proper Ada code to use the attribute 'Position | |
4536 | -- on something else than an object but this is supported by | |
4537 | -- the back end (see comment on the Bit_Component attribute in | |
4538 | -- sem_attr). So we avoid semantic checking here. | |
4539 | ||
4540 | -- Is this documented in sinfo.ads??? it should be! | |
4541 | ||
4542 | Set_Analyzed (RC_Offset_Node); | |
4543 | Set_Etype (Prefix (RC_Offset_Node), RTE (RE_Record_Controller)); | |
4544 | Set_Etype (Prefix (Prefix (RC_Offset_Node)), Typ); | |
4545 | Set_Etype (Selector_Name (Prefix (RC_Offset_Node)), | |
4546 | RTE (RE_Record_Controller)); | |
4547 | Set_Etype (RC_Offset_Node, RTE (RE_Storage_Offset)); | |
68f95949 | 4548 | end if; |
952af0b9 | 4549 | |
17e14451 | 4550 | Append_To (TSD_Aggr_List, RC_Offset_Node); |
4551 | end; | |
725a69d2 | 4552 | |
cc60bd16 | 4553 | -- Size_Func |
4554 | ||
4555 | if RTE_Record_Component_Available (RE_Size_Func) then | |
4556 | if not Building_Static_DT (Typ) | |
4557 | or else Is_Interface (Typ) | |
4558 | then | |
4559 | Append_To (TSD_Aggr_List, | |
4560 | Unchecked_Convert_To (RTE (RE_Size_Ptr), | |
4561 | New_Reference_To (RTE (RE_Null_Address), Loc))); | |
4562 | ||
4563 | else | |
4564 | declare | |
4565 | Prim_Elmt : Elmt_Id; | |
4566 | Prim : Entity_Id; | |
4567 | ||
4568 | begin | |
4569 | Prim_Elmt := First_Elmt (Primitive_Operations (Typ)); | |
4570 | while Present (Prim_Elmt) loop | |
4571 | Prim := Node (Prim_Elmt); | |
4572 | ||
4573 | if Chars (Prim) = Name_uSize then | |
4574 | while Present (Alias (Prim)) loop | |
4575 | Prim := Alias (Prim); | |
4576 | end loop; | |
4577 | ||
4578 | if Is_Abstract_Subprogram (Prim) then | |
4579 | Append_To (TSD_Aggr_List, | |
4580 | Unchecked_Convert_To (RTE (RE_Size_Ptr), | |
4581 | New_Reference_To (RTE (RE_Null_Address), Loc))); | |
4582 | else | |
4583 | Append_To (TSD_Aggr_List, | |
4584 | Unchecked_Convert_To (RTE (RE_Size_Ptr), | |
4585 | Make_Attribute_Reference (Loc, | |
4586 | Prefix => New_Reference_To (Prim, Loc), | |
4587 | Attribute_Name => Name_Unrestricted_Access))); | |
4588 | end if; | |
4589 | ||
4590 | exit; | |
4591 | end if; | |
4592 | ||
4593 | Next_Elmt (Prim_Elmt); | |
4594 | end loop; | |
4595 | end; | |
4596 | end if; | |
4597 | end if; | |
4598 | ||
725a69d2 | 4599 | -- Interfaces_Table (required for AI-405) |
4600 | ||
4601 | if RTE_Record_Component_Available (RE_Interfaces_Table) then | |
4602 | ||
4603 | -- Count the number of interface types implemented by Typ | |
4604 | ||
a652dd51 | 4605 | Collect_Interfaces (Typ, Typ_Ifaces); |
725a69d2 | 4606 | |
4607 | AI := First_Elmt (Typ_Ifaces); | |
4608 | while Present (AI) loop | |
4609 | Num_Ifaces := Num_Ifaces + 1; | |
4610 | Next_Elmt (AI); | |
4611 | end loop; | |
952af0b9 | 4612 | |
343d35dc | 4613 | if Num_Ifaces = 0 then |
725a69d2 | 4614 | Iface_Table_Node := Make_Null (Loc); |
952af0b9 | 4615 | |
725a69d2 | 4616 | -- Generate the Interface_Table object |
343d35dc | 4617 | |
4618 | else | |
725a69d2 | 4619 | declare |
17e14451 | 4620 | TSD_Ifaces_List : constant List_Id := New_List; |
cdb1c38f | 4621 | Elmt : Elmt_Id; |
4622 | Sec_DT_Tag : Node_Id; | |
725a69d2 | 4623 | |
4624 | begin | |
4625 | AI := First_Elmt (Typ_Ifaces); | |
4626 | while Present (AI) loop | |
a652dd51 | 4627 | if Is_Ancestor (Node (AI), Typ) then |
cdb1c38f | 4628 | Sec_DT_Tag := |
4629 | New_Reference_To (DT_Ptr, Loc); | |
4630 | else | |
acf97c11 | 4631 | Elmt := |
4632 | Next_Elmt | |
4633 | (Next_Elmt (First_Elmt (Access_Disp_Table (Typ)))); | |
cdb1c38f | 4634 | pragma Assert (Has_Thunks (Node (Elmt))); |
4635 | ||
4636 | while Ekind (Node (Elmt)) = E_Constant | |
4637 | and then not | |
a652dd51 | 4638 | Is_Ancestor (Node (AI), Related_Type (Node (Elmt))) |
cdb1c38f | 4639 | loop |
4640 | pragma Assert (Has_Thunks (Node (Elmt))); | |
4641 | Next_Elmt (Elmt); | |
acf97c11 | 4642 | pragma Assert (Has_Thunks (Node (Elmt))); |
4643 | Next_Elmt (Elmt); | |
4644 | pragma Assert (not Has_Thunks (Node (Elmt))); | |
4645 | Next_Elmt (Elmt); | |
cdb1c38f | 4646 | pragma Assert (not Has_Thunks (Node (Elmt))); |
4647 | Next_Elmt (Elmt); | |
4648 | end loop; | |
4649 | ||
4650 | pragma Assert (Ekind (Node (Elmt)) = E_Constant | |
acf97c11 | 4651 | and then not |
4652 | Has_Thunks (Node (Next_Elmt (Next_Elmt (Elmt))))); | |
cdb1c38f | 4653 | Sec_DT_Tag := |
acf97c11 | 4654 | New_Reference_To (Node (Next_Elmt (Next_Elmt (Elmt))), |
4655 | Loc); | |
cdb1c38f | 4656 | end if; |
4657 | ||
17e14451 | 4658 | Append_To (TSD_Ifaces_List, |
4659 | Make_Aggregate (Loc, | |
4660 | Expressions => New_List ( | |
4661 | ||
4662 | -- Iface_Tag | |
4663 | ||
24971415 | 4664 | Unchecked_Convert_To (RTE (RE_Tag), |
725a69d2 | 4665 | New_Reference_To |
4666 | (Node (First_Elmt (Access_Disp_Table (Node (AI)))), | |
17e14451 | 4667 | Loc)), |
725a69d2 | 4668 | |
17e14451 | 4669 | -- Static_Offset_To_Top |
725a69d2 | 4670 | |
17e14451 | 4671 | New_Reference_To (Standard_True, Loc), |
725a69d2 | 4672 | |
17e14451 | 4673 | -- Offset_To_Top_Value |
4674 | ||
4675 | Make_Integer_Literal (Loc, 0), | |
4676 | ||
4677 | -- Offset_To_Top_Func | |
4678 | ||
cdb1c38f | 4679 | Make_Null (Loc), |
4680 | ||
4681 | -- Secondary_DT | |
4682 | ||
4683 | Unchecked_Convert_To (RTE (RE_Tag), Sec_DT_Tag) | |
4684 | ||
4685 | ))); | |
725a69d2 | 4686 | |
725a69d2 | 4687 | Next_Elmt (AI); |
4688 | end loop; | |
725a69d2 | 4689 | |
17e14451 | 4690 | Name_ITable := New_External_Name (Tname, 'I'); |
4691 | ITable := Make_Defining_Identifier (Loc, Name_ITable); | |
2ea346ac | 4692 | Set_Is_Statically_Allocated (ITable, |
4693 | Is_Library_Level_Tagged_Type (Typ)); | |
725a69d2 | 4694 | |
17e14451 | 4695 | -- The table of interfaces is not constant; its slots are |
4696 | -- filled at run-time by the IP routine using attribute | |
4697 | -- 'Position to know the location of the tag components | |
4698 | -- (and this attribute cannot be safely used before the | |
4699 | -- object is initialized). | |
725a69d2 | 4700 | |
17e14451 | 4701 | Append_To (Result, |
4702 | Make_Object_Declaration (Loc, | |
4703 | Defining_Identifier => ITable, | |
4704 | Aliased_Present => True, | |
4705 | Constant_Present => False, | |
4706 | Object_Definition => | |
4707 | Make_Subtype_Indication (Loc, | |
4708 | Subtype_Mark => | |
4709 | New_Reference_To (RTE (RE_Interface_Data), Loc), | |
4710 | Constraint => Make_Index_Or_Discriminant_Constraint | |
4711 | (Loc, | |
4712 | Constraints => New_List ( | |
4713 | Make_Integer_Literal (Loc, Num_Ifaces)))), | |
725a69d2 | 4714 | |
17e14451 | 4715 | Expression => Make_Aggregate (Loc, |
4716 | Expressions => New_List ( | |
4717 | Make_Integer_Literal (Loc, Num_Ifaces), | |
4718 | Make_Aggregate (Loc, | |
4719 | Expressions => TSD_Ifaces_List))))); | |
725a69d2 | 4720 | |
17e14451 | 4721 | Append_To (Result, |
4722 | Make_Attribute_Definition_Clause (Loc, | |
4723 | Name => New_Reference_To (ITable, Loc), | |
4724 | Chars => Name_Alignment, | |
4725 | Expression => | |
4726 | Make_Attribute_Reference (Loc, | |
4727 | Prefix => | |
4728 | New_Reference_To (RTE (RE_Integer_Address), Loc), | |
4729 | Attribute_Name => Name_Alignment))); | |
725a69d2 | 4730 | |
17e14451 | 4731 | Iface_Table_Node := |
4732 | Make_Attribute_Reference (Loc, | |
4733 | Prefix => New_Reference_To (ITable, Loc), | |
4734 | Attribute_Name => Name_Unchecked_Access); | |
4735 | end; | |
725a69d2 | 4736 | end if; |
4737 | ||
17e14451 | 4738 | Append_To (TSD_Aggr_List, Iface_Table_Node); |
725a69d2 | 4739 | end if; |
4740 | ||
4741 | -- Generate the Select Specific Data table for synchronized types that | |
4742 | -- implement synchronized interfaces. The size of the table is | |
4743 | -- constrained by the number of non-predefined primitive operations. | |
4744 | ||
4745 | if RTE_Record_Component_Available (RE_SSD) then | |
4746 | if Ada_Version >= Ada_05 | |
24971415 | 4747 | and then Has_DT (Typ) |
725a69d2 | 4748 | and then Is_Concurrent_Record_Type (Typ) |
a652dd51 | 4749 | and then Has_Interfaces (Typ) |
725a69d2 | 4750 | and then Nb_Prim > 0 |
4751 | and then not Is_Abstract_Type (Typ) | |
4752 | and then not Is_Controlled (Typ) | |
4753 | and then not Restriction_Active (No_Dispatching_Calls) | |
f38c8084 | 4754 | and then not Restriction_Active (No_Select_Statements) |
725a69d2 | 4755 | then |
343d35dc | 4756 | Append_To (Result, |
4757 | Make_Object_Declaration (Loc, | |
725a69d2 | 4758 | Defining_Identifier => SSD, |
343d35dc | 4759 | Aliased_Present => True, |
4760 | Object_Definition => | |
4761 | Make_Subtype_Indication (Loc, | |
725a69d2 | 4762 | Subtype_Mark => New_Reference_To ( |
4763 | RTE (RE_Select_Specific_Data), Loc), | |
4764 | Constraint => | |
4765 | Make_Index_Or_Discriminant_Constraint (Loc, | |
4766 | Constraints => New_List ( | |
4767 | Make_Integer_Literal (Loc, Nb_Prim)))))); | |
4768 | ||
17e14451 | 4769 | Append_To (Result, |
4770 | Make_Attribute_Definition_Clause (Loc, | |
4771 | Name => New_Reference_To (SSD, Loc), | |
4772 | Chars => Name_Alignment, | |
4773 | Expression => | |
4774 | Make_Attribute_Reference (Loc, | |
4775 | Prefix => | |
4776 | New_Reference_To (RTE (RE_Integer_Address), Loc), | |
4777 | Attribute_Name => Name_Alignment))); | |
4778 | ||
725a69d2 | 4779 | -- This table is initialized by Make_Select_Specific_Data_Table, |
4780 | -- which calls Set_Entry_Index and Set_Prim_Op_Kind. | |
4781 | ||
4782 | Append_To (TSD_Aggr_List, | |
17e14451 | 4783 | Make_Attribute_Reference (Loc, |
4784 | Prefix => New_Reference_To (SSD, Loc), | |
4785 | Attribute_Name => Name_Unchecked_Access)); | |
725a69d2 | 4786 | else |
17e14451 | 4787 | Append_To (TSD_Aggr_List, Make_Null (Loc)); |
343d35dc | 4788 | end if; |
952af0b9 | 4789 | end if; |
4790 | ||
725a69d2 | 4791 | -- Initialize the table of ancestor tags. In case of interface types |
4792 | -- this table is not needed. | |
d62940bf | 4793 | |
cc60bd16 | 4794 | TSD_Tags_List := New_List; |
952af0b9 | 4795 | |
cc60bd16 | 4796 | -- If we are not statically allocating the dispatch table then we must |
4797 | -- fill position 0 with null because we still have not generated the | |
4798 | -- tag of Typ. | |
343d35dc | 4799 | |
cc60bd16 | 4800 | if not Building_Static_DT (Typ) |
4801 | or else Is_Interface (Typ) | |
4802 | then | |
4803 | Append_To (TSD_Tags_List, | |
4804 | Unchecked_Convert_To (RTE (RE_Tag), | |
4805 | New_Reference_To (RTE (RE_Null_Address), Loc))); | |
343d35dc | 4806 | |
cc60bd16 | 4807 | -- Otherwise we can safely reference the tag |
343d35dc | 4808 | |
cc60bd16 | 4809 | else |
4810 | Append_To (TSD_Tags_List, | |
4811 | New_Reference_To (DT_Ptr, Loc)); | |
4812 | end if; | |
343d35dc | 4813 | |
cc60bd16 | 4814 | -- Fill the rest of the table with the tags of the ancestors |
343d35dc | 4815 | |
cc60bd16 | 4816 | declare |
4817 | Current_Typ : Entity_Id; | |
4818 | Parent_Typ : Entity_Id; | |
4819 | Pos : Nat; | |
725a69d2 | 4820 | |
cc60bd16 | 4821 | begin |
17e14451 | 4822 | Pos := 1; |
4823 | Current_Typ := Typ; | |
725a69d2 | 4824 | |
17e14451 | 4825 | loop |
4826 | Parent_Typ := Etype (Current_Typ); | |
343d35dc | 4827 | |
17e14451 | 4828 | if Is_Private_Type (Parent_Typ) then |
4829 | Parent_Typ := Full_View (Base_Type (Parent_Typ)); | |
4830 | end if; | |
4831 | ||
4832 | exit when Parent_Typ = Current_Typ; | |
4833 | ||
4834 | if Is_CPP_Class (Parent_Typ) | |
4835 | or else Is_Interface (Typ) | |
4836 | then | |
4837 | -- The tags defined in the C++ side will be inherited when | |
4838 | -- the object is constructed (Exp_Ch3.Build_Init_Procedure) | |
4839 | ||
4840 | Append_To (TSD_Tags_List, | |
4841 | Unchecked_Convert_To (RTE (RE_Tag), | |
4842 | New_Reference_To (RTE (RE_Null_Address), Loc))); | |
4843 | else | |
4844 | Append_To (TSD_Tags_List, | |
4845 | New_Reference_To | |
4846 | (Node (First_Elmt (Access_Disp_Table (Parent_Typ))), | |
4847 | Loc)); | |
4848 | end if; | |
4849 | ||
4850 | Pos := Pos + 1; | |
4851 | Current_Typ := Parent_Typ; | |
4852 | end loop; | |
4853 | ||
4854 | pragma Assert (Pos = I_Depth + 1); | |
4855 | end; | |
4856 | ||
4857 | Append_To (TSD_Aggr_List, | |
4858 | Make_Aggregate (Loc, | |
4859 | Expressions => TSD_Tags_List)); | |
343d35dc | 4860 | |
725a69d2 | 4861 | -- Build the TSD object |
343d35dc | 4862 | |
4863 | Append_To (Result, | |
4864 | Make_Object_Declaration (Loc, | |
4865 | Defining_Identifier => TSD, | |
4866 | Aliased_Present => True, | |
24971415 | 4867 | Constant_Present => Building_Static_DT (Typ), |
343d35dc | 4868 | Object_Definition => |
4869 | Make_Subtype_Indication (Loc, | |
4870 | Subtype_Mark => New_Reference_To ( | |
4871 | RTE (RE_Type_Specific_Data), Loc), | |
4872 | Constraint => | |
4873 | Make_Index_Or_Discriminant_Constraint (Loc, | |
4874 | Constraints => New_List ( | |
4875 | Make_Integer_Literal (Loc, I_Depth)))), | |
725a69d2 | 4876 | |
343d35dc | 4877 | Expression => Make_Aggregate (Loc, |
17e14451 | 4878 | Expressions => TSD_Aggr_List))); |
343d35dc | 4879 | |
24971415 | 4880 | Set_Is_True_Constant (TSD, Building_Static_DT (Typ)); |
4881 | ||
343d35dc | 4882 | Append_To (Result, |
4883 | Make_Attribute_Definition_Clause (Loc, | |
4884 | Name => New_Reference_To (TSD, Loc), | |
4885 | Chars => Name_Alignment, | |
4886 | Expression => | |
4887 | Make_Attribute_Reference (Loc, | |
4888 | Prefix => New_Reference_To (RTE (RE_Integer_Address), Loc), | |
4889 | Attribute_Name => Name_Alignment))); | |
4890 | ||
24971415 | 4891 | -- Initialize or declare the dispatch table object |
343d35dc | 4892 | |
24971415 | 4893 | if not Has_DT (Typ) then |
725a69d2 | 4894 | DT_Constr_List := New_List; |
4895 | DT_Aggr_List := New_List; | |
343d35dc | 4896 | |
725a69d2 | 4897 | -- Typeinfo |
952af0b9 | 4898 | |
725a69d2 | 4899 | New_Node := |
4900 | Make_Attribute_Reference (Loc, | |
4901 | Prefix => New_Reference_To (TSD, Loc), | |
4902 | Attribute_Name => Name_Address); | |
4903 | ||
4904 | Append_To (DT_Constr_List, New_Node); | |
4905 | Append_To (DT_Aggr_List, New_Copy (New_Node)); | |
4906 | Append_To (DT_Aggr_List, Make_Integer_Literal (Loc, 0)); | |
4907 | ||
4908 | -- In case of locally defined tagged types we have already declared | |
4909 | -- and uninitialized object for the dispatch table, which is now | |
24971415 | 4910 | -- initialized by means of the following assignment: |
4911 | ||
4912 | -- DT := (TSD'Address, 0); | |
725a69d2 | 4913 | |
24971415 | 4914 | if not Building_Static_DT (Typ) then |
725a69d2 | 4915 | Append_To (Result, |
4916 | Make_Assignment_Statement (Loc, | |
4917 | Name => New_Reference_To (DT, Loc), | |
4918 | Expression => Make_Aggregate (Loc, | |
4919 | Expressions => DT_Aggr_List))); | |
4920 | ||
24971415 | 4921 | -- In case of library level tagged types we declare and export now |
4922 | -- the constant object containing the dummy dispatch table. There | |
4923 | -- is no need to declare the tag here because it has been previously | |
4924 | -- declared by Make_Tags | |
4925 | ||
4926 | -- DT : aliased constant No_Dispatch_Table := | |
4927 | -- (NDT_TSD => TSD'Address; | |
4928 | -- NDT_Prims_Ptr => 0); | |
4929 | -- for DT'Alignment use Address'Alignment; | |
725a69d2 | 4930 | |
4931 | else | |
4932 | Append_To (Result, | |
4933 | Make_Object_Declaration (Loc, | |
4934 | Defining_Identifier => DT, | |
4935 | Aliased_Present => True, | |
17e14451 | 4936 | Constant_Present => True, |
725a69d2 | 4937 | Object_Definition => |
4938 | New_Reference_To (RTE (RE_No_Dispatch_Table_Wrapper), Loc), | |
4939 | Expression => Make_Aggregate (Loc, | |
4940 | Expressions => DT_Aggr_List))); | |
4941 | ||
17e14451 | 4942 | Append_To (Result, |
4943 | Make_Attribute_Definition_Clause (Loc, | |
4944 | Name => New_Reference_To (DT, Loc), | |
4945 | Chars => Name_Alignment, | |
4946 | Expression => | |
4947 | Make_Attribute_Reference (Loc, | |
4948 | Prefix => | |
4949 | New_Reference_To (RTE (RE_Integer_Address), Loc), | |
4950 | Attribute_Name => Name_Alignment))); | |
4951 | ||
24971415 | 4952 | Export_DT (Typ, DT); |
725a69d2 | 4953 | end if; |
4954 | ||
4955 | -- Common case: Typ has a dispatch table | |
4956 | ||
4957 | -- Generate: | |
4958 | ||
4959 | -- Predef_Prims : Address_Array (1 .. Default_Prim_Ops_Count) := | |
4960 | -- (predef-prim-op-1'address, | |
4961 | -- predef-prim-op-2'address, | |
4962 | -- ... | |
4963 | -- predef-prim-op-n'address); | |
4964 | -- for Predef_Prims'Alignment use Address'Alignment | |
4965 | ||
4966 | -- DT : Dispatch_Table (Nb_Prims) := | |
4967 | -- (Signature => <sig-value>, | |
4968 | -- Tag_Kind => <tag_kind-value>, | |
4969 | -- Predef_Prims => Predef_Prims'First'Address, | |
4970 | -- Offset_To_Top => 0, | |
4971 | -- TSD => TSD'Address; | |
4972 | -- Prims_Ptr => (prim-op-1'address, | |
4973 | -- prim-op-2'address, | |
4974 | -- ... | |
4975 | -- prim-op-n'address)); | |
17e14451 | 4976 | -- for DT'Alignment use Address'Alignment |
725a69d2 | 4977 | |
4978 | else | |
4979 | declare | |
4980 | Pos : Nat; | |
4981 | ||
4982 | begin | |
24971415 | 4983 | if not Building_Static_DT (Typ) then |
725a69d2 | 4984 | Nb_Predef_Prims := Max_Predef_Prims; |
4985 | ||
4986 | else | |
4987 | Prim_Elmt := First_Elmt (Primitive_Operations (Typ)); | |
4988 | while Present (Prim_Elmt) loop | |
4989 | Prim := Node (Prim_Elmt); | |
4990 | ||
4991 | if Is_Predefined_Dispatching_Operation (Prim) | |
4992 | and then not Is_Abstract_Subprogram (Prim) | |
4993 | then | |
4994 | Pos := UI_To_Int (DT_Position (Prim)); | |
4995 | ||
4996 | if Pos > Nb_Predef_Prims then | |
4997 | Nb_Predef_Prims := Pos; | |
4998 | end if; | |
4999 | end if; | |
5000 | ||
5001 | Next_Elmt (Prim_Elmt); | |
5002 | end loop; | |
5003 | end if; | |
5004 | ||
5005 | declare | |
5006 | Prim_Table : array | |
5007 | (Nat range 1 .. Nb_Predef_Prims) of Entity_Id; | |
cc60bd16 | 5008 | Decl : Node_Id; |
725a69d2 | 5009 | E : Entity_Id; |
5010 | ||
5011 | begin | |
5012 | Prim_Ops_Aggr_List := New_List; | |
5013 | ||
5014 | Prim_Table := (others => Empty); | |
17e14451 | 5015 | |
cdb1c38f | 5016 | if Building_Static_DT (Typ) then |
5017 | Prim_Elmt := First_Elmt (Primitive_Operations (Typ)); | |
5018 | while Present (Prim_Elmt) loop | |
5019 | Prim := Node (Prim_Elmt); | |
725a69d2 | 5020 | |
cdb1c38f | 5021 | if Is_Predefined_Dispatching_Operation (Prim) |
5022 | and then not Is_Abstract_Subprogram (Prim) | |
5023 | and then not Present (Prim_Table | |
5024 | (UI_To_Int (DT_Position (Prim)))) | |
5025 | then | |
5026 | E := Prim; | |
5027 | while Present (Alias (E)) loop | |
5028 | E := Alias (E); | |
5029 | end loop; | |
725a69d2 | 5030 | |
cdb1c38f | 5031 | pragma Assert (not Is_Abstract_Subprogram (E)); |
5032 | Prim_Table (UI_To_Int (DT_Position (Prim))) := E; | |
5033 | end if; | |
725a69d2 | 5034 | |
cdb1c38f | 5035 | Next_Elmt (Prim_Elmt); |
5036 | end loop; | |
5037 | end if; | |
725a69d2 | 5038 | |
5039 | for J in Prim_Table'Range loop | |
5040 | if Present (Prim_Table (J)) then | |
5041 | New_Node := | |
cc60bd16 | 5042 | Unchecked_Convert_To (RTE (RE_Prim_Ptr), |
acf97c11 | 5043 | Make_Attribute_Reference (Loc, |
5044 | Prefix => New_Reference_To (Prim_Table (J), Loc), | |
5045 | Attribute_Name => Name_Unrestricted_Access)); | |
725a69d2 | 5046 | else |
cc60bd16 | 5047 | New_Node := Make_Null (Loc); |
725a69d2 | 5048 | end if; |
5049 | ||
5050 | Append_To (Prim_Ops_Aggr_List, New_Node); | |
5051 | end loop; | |
343d35dc | 5052 | |
cc60bd16 | 5053 | New_Node := |
5054 | Make_Aggregate (Loc, | |
5055 | Expressions => Prim_Ops_Aggr_List); | |
5056 | ||
5057 | Decl := | |
5058 | Make_Subtype_Declaration (Loc, | |
5059 | Defining_Identifier => | |
5060 | Make_Defining_Identifier (Loc, | |
5061 | New_Internal_Name ('S')), | |
5062 | Subtype_Indication => | |
5063 | New_Reference_To (RTE (RE_Address_Array), Loc)); | |
5064 | ||
5065 | Append_To (Result, Decl); | |
5066 | ||
68f95949 | 5067 | Append_To (Result, |
5068 | Make_Object_Declaration (Loc, | |
725a69d2 | 5069 | Defining_Identifier => Predef_Prims, |
68f95949 | 5070 | Aliased_Present => True, |
24971415 | 5071 | Constant_Present => Building_Static_DT (Typ), |
cc60bd16 | 5072 | Object_Definition => New_Reference_To |
5073 | (Defining_Identifier (Decl), Loc), | |
5074 | Expression => New_Node)); | |
5075 | ||
5076 | -- Remember aggregates initializing dispatch tables | |
5077 | ||
5078 | Append_Elmt (New_Node, DT_Aggr); | |
725a69d2 | 5079 | |
5080 | Append_To (Result, | |
5081 | Make_Attribute_Definition_Clause (Loc, | |
5082 | Name => New_Reference_To (Predef_Prims, Loc), | |
5083 | Chars => Name_Alignment, | |
5084 | Expression => | |
5085 | Make_Attribute_Reference (Loc, | |
5086 | Prefix => | |
5087 | New_Reference_To (RTE (RE_Integer_Address), Loc), | |
5088 | Attribute_Name => Name_Alignment))); | |
5089 | end; | |
5090 | end; | |
5091 | ||
5092 | -- Stage 1: Initialize the discriminant and the record components | |
5093 | ||
5094 | DT_Constr_List := New_List; | |
5095 | DT_Aggr_List := New_List; | |
5096 | ||
5097 | -- Num_Prims. If the tagged type has no primitives we add a dummy | |
5098 | -- slot whose address will be the tag of this type. | |
5099 | ||
5100 | if Nb_Prim = 0 then | |
5101 | New_Node := Make_Integer_Literal (Loc, 1); | |
5102 | else | |
5103 | New_Node := Make_Integer_Literal (Loc, Nb_Prim); | |
5104 | end if; | |
5105 | ||
5106 | Append_To (DT_Constr_List, New_Node); | |
5107 | Append_To (DT_Aggr_List, New_Copy (New_Node)); | |
5108 | ||
5109 | -- Signature | |
5110 | ||
5111 | if RTE_Record_Component_Available (RE_Signature) then | |
5112 | Append_To (DT_Aggr_List, | |
5113 | New_Reference_To (RTE (RE_Primary_DT), Loc)); | |
5114 | end if; | |
5115 | ||
5116 | -- Tag_Kind | |
5117 | ||
5118 | if RTE_Record_Component_Available (RE_Tag_Kind) then | |
5119 | Append_To (DT_Aggr_List, Tagged_Kind (Typ)); | |
5120 | end if; | |
5121 | ||
5122 | -- Predef_Prims | |
5123 | ||
5124 | Append_To (DT_Aggr_List, | |
5125 | Make_Attribute_Reference (Loc, | |
5126 | Prefix => New_Reference_To (Predef_Prims, Loc), | |
5127 | Attribute_Name => Name_Address)); | |
5128 | ||
5129 | -- Offset_To_Top | |
5130 | ||
cc60bd16 | 5131 | Append_To (DT_Aggr_List, Make_Integer_Literal (Loc, 0)); |
725a69d2 | 5132 | |
5133 | -- Typeinfo | |
5134 | ||
5135 | Append_To (DT_Aggr_List, | |
5136 | Make_Attribute_Reference (Loc, | |
5137 | Prefix => New_Reference_To (TSD, Loc), | |
5138 | Attribute_Name => Name_Address)); | |
5139 | ||
5140 | -- Stage 2: Initialize the table of primitive operations | |
5141 | ||
5142 | Prim_Ops_Aggr_List := New_List; | |
5143 | ||
5144 | if Nb_Prim = 0 then | |
cc60bd16 | 5145 | Append_To (Prim_Ops_Aggr_List, Make_Null (Loc)); |
725a69d2 | 5146 | |
24971415 | 5147 | elsif not Building_Static_DT (Typ) then |
725a69d2 | 5148 | for J in 1 .. Nb_Prim loop |
cc60bd16 | 5149 | Append_To (Prim_Ops_Aggr_List, Make_Null (Loc)); |
725a69d2 | 5150 | end loop; |
5151 | ||
5152 | else | |
5153 | declare | |
5154 | Prim_Table : array (Nat range 1 .. Nb_Prim) of Entity_Id; | |
5155 | E : Entity_Id; | |
5156 | Prim : Entity_Id; | |
5157 | Prim_Elmt : Elmt_Id; | |
5158 | ||
5159 | begin | |
5160 | Prim_Table := (others => Empty); | |
cdb1c38f | 5161 | |
5162 | Prim_Elmt := First_Elmt (Primitive_Operations (Typ)); | |
725a69d2 | 5163 | while Present (Prim_Elmt) loop |
5164 | Prim := Node (Prim_Elmt); | |
5165 | ||
9429b6e9 | 5166 | -- Retrieve the ultimate alias of the primitive for proper |
5167 | -- handling of renamings and eliminated primitives. | |
5168 | ||
5169 | E := Ultimate_Alias (Prim); | |
5170 | ||
725a69d2 | 5171 | if Is_Imported (Prim) |
a652dd51 | 5172 | or else Present (Interface_Alias (Prim)) |
725a69d2 | 5173 | or else Is_Predefined_Dispatching_Operation (Prim) |
9429b6e9 | 5174 | or else Is_Eliminated (E) |
725a69d2 | 5175 | then |
5176 | null; | |
5177 | ||
5178 | else | |
725a69d2 | 5179 | if not Is_Predefined_Dispatching_Operation (E) |
5180 | and then not Is_Abstract_Subprogram (E) | |
a652dd51 | 5181 | and then not Present (Interface_Alias (E)) |
725a69d2 | 5182 | then |
5183 | pragma Assert | |
5184 | (UI_To_Int (DT_Position (Prim)) <= Nb_Prim); | |
5185 | ||
5186 | Prim_Table (UI_To_Int (DT_Position (Prim))) := E; | |
725a69d2 | 5187 | end if; |
5188 | end if; | |
5189 | ||
5190 | Next_Elmt (Prim_Elmt); | |
5191 | end loop; | |
5192 | ||
5193 | for J in Prim_Table'Range loop | |
5194 | if Present (Prim_Table (J)) then | |
5195 | New_Node := | |
cc60bd16 | 5196 | Unchecked_Convert_To (RTE (RE_Prim_Ptr), |
acf97c11 | 5197 | Make_Attribute_Reference (Loc, |
5198 | Prefix => New_Reference_To (Prim_Table (J), Loc), | |
5199 | Attribute_Name => Name_Unrestricted_Access)); | |
725a69d2 | 5200 | else |
cc60bd16 | 5201 | New_Node := Make_Null (Loc); |
725a69d2 | 5202 | end if; |
5203 | ||
5204 | Append_To (Prim_Ops_Aggr_List, New_Node); | |
5205 | end loop; | |
5206 | end; | |
5207 | end if; | |
5208 | ||
cc60bd16 | 5209 | New_Node := |
725a69d2 | 5210 | Make_Aggregate (Loc, |
cc60bd16 | 5211 | Expressions => Prim_Ops_Aggr_List); |
5212 | ||
5213 | Append_To (DT_Aggr_List, New_Node); | |
5214 | ||
5215 | -- Remember aggregates initializing dispatch tables | |
5216 | ||
5217 | Append_Elmt (New_Node, DT_Aggr); | |
725a69d2 | 5218 | |
5219 | -- In case of locally defined tagged types we have already declared | |
5220 | -- and uninitialized object for the dispatch table, which is now | |
5221 | -- initialized by means of an assignment. | |
5222 | ||
24971415 | 5223 | if not Building_Static_DT (Typ) then |
725a69d2 | 5224 | Append_To (Result, |
5225 | Make_Assignment_Statement (Loc, | |
5226 | Name => New_Reference_To (DT, Loc), | |
5227 | Expression => Make_Aggregate (Loc, | |
5228 | Expressions => DT_Aggr_List))); | |
5229 | ||
24971415 | 5230 | -- In case of library level tagged types we declare now and export |
5231 | -- the constant object containing the dispatch table. | |
725a69d2 | 5232 | |
5233 | else | |
5234 | Append_To (Result, | |
5235 | Make_Object_Declaration (Loc, | |
5236 | Defining_Identifier => DT, | |
5237 | Aliased_Present => True, | |
17e14451 | 5238 | Constant_Present => True, |
725a69d2 | 5239 | Object_Definition => |
5240 | Make_Subtype_Indication (Loc, | |
5241 | Subtype_Mark => New_Reference_To | |
5242 | (RTE (RE_Dispatch_Table_Wrapper), Loc), | |
5243 | Constraint => Make_Index_Or_Discriminant_Constraint (Loc, | |
5244 | Constraints => DT_Constr_List)), | |
5245 | Expression => Make_Aggregate (Loc, | |
5246 | Expressions => DT_Aggr_List))); | |
5247 | ||
5248 | Append_To (Result, | |
5249 | Make_Attribute_Definition_Clause (Loc, | |
5250 | Name => New_Reference_To (DT, Loc), | |
5251 | Chars => Name_Alignment, | |
5252 | Expression => | |
5253 | Make_Attribute_Reference (Loc, | |
5254 | Prefix => | |
5255 | New_Reference_To (RTE (RE_Integer_Address), Loc), | |
5256 | Attribute_Name => Name_Alignment))); | |
5257 | ||
24971415 | 5258 | Export_DT (Typ, DT); |
952af0b9 | 5259 | end if; |
76a1c25b | 5260 | end if; |
d62940bf | 5261 | |
f301a57b | 5262 | -- Initialize the table of ancestor tags if not building static |
5263 | -- dispatch table | |
725a69d2 | 5264 | |
24971415 | 5265 | if not Building_Static_DT (Typ) |
17e14451 | 5266 | and then not Is_Interface (Typ) |
725a69d2 | 5267 | and then not Is_CPP_Class (Typ) |
5268 | then | |
5269 | Append_To (Result, | |
5270 | Make_Assignment_Statement (Loc, | |
5271 | Name => | |
5272 | Make_Indexed_Component (Loc, | |
5273 | Prefix => | |
5274 | Make_Selected_Component (Loc, | |
5275 | Prefix => | |
5276 | New_Reference_To (TSD, Loc), | |
5277 | Selector_Name => | |
5278 | New_Reference_To | |
5279 | (RTE_Record_Component (RE_Tags_Table), Loc)), | |
5280 | Expressions => | |
5281 | New_List (Make_Integer_Literal (Loc, 0))), | |
5282 | ||
5283 | Expression => | |
5284 | New_Reference_To | |
5285 | (Node (First_Elmt (Access_Disp_Table (Typ))), Loc))); | |
5286 | end if; | |
5287 | ||
f301a57b | 5288 | -- Inherit the dispatch tables of the parent. There is no need to |
5289 | -- inherit anything from the parent when building static dispatch tables | |
5290 | -- because the whole dispatch table (including inherited primitives) has | |
5291 | -- been already built. | |
acf97c11 | 5292 | |
24971415 | 5293 | if Building_Static_DT (Typ) then |
725a69d2 | 5294 | null; |
5295 | ||
af647dc7 | 5296 | -- If the ancestor is a CPP_Class type we inherit the dispatch tables |
5297 | -- in the init proc, and we don't need to fill them in here. | |
d62940bf | 5298 | |
cc60bd16 | 5299 | elsif Is_CPP_Class (Parent_Typ) then |
af647dc7 | 5300 | null; |
d62940bf | 5301 | |
acf97c11 | 5302 | -- Otherwise we fill in the dispatch tables here |
d62940bf | 5303 | |
af647dc7 | 5304 | else |
cc60bd16 | 5305 | if Typ /= Parent_Typ |
af647dc7 | 5306 | and then not Is_Interface (Typ) |
5307 | and then not Restriction_Active (No_Dispatching_Calls) | |
68f95949 | 5308 | then |
343d35dc | 5309 | -- Inherit the dispatch table |
d62940bf | 5310 | |
acf97c11 | 5311 | if not Is_Interface (Typ) |
cc60bd16 | 5312 | and then not Is_Interface (Parent_Typ) |
5313 | and then not Is_CPP_Class (Parent_Typ) | |
acf97c11 | 5314 | then |
5315 | declare | |
5316 | Nb_Prims : constant Int := | |
5317 | UI_To_Int (DT_Entry_Count | |
cc60bd16 | 5318 | (First_Tag_Component (Parent_Typ))); |
5319 | ||
acf97c11 | 5320 | begin |
5321 | Append_To (Elab_Code, | |
5322 | Build_Inherit_Predefined_Prims (Loc, | |
5323 | Old_Tag_Node => | |
5324 | New_Reference_To | |
5325 | (Node | |
5326 | (Next_Elmt | |
5327 | (First_Elmt | |
cc60bd16 | 5328 | (Access_Disp_Table (Parent_Typ)))), Loc), |
acf97c11 | 5329 | New_Tag_Node => |
5330 | New_Reference_To | |
5331 | (Node | |
5332 | (Next_Elmt | |
5333 | (First_Elmt | |
5334 | (Access_Disp_Table (Typ)))), Loc))); | |
5335 | ||
5336 | if Nb_Prims /= 0 then | |
725a69d2 | 5337 | Append_To (Elab_Code, |
acf97c11 | 5338 | Build_Inherit_Prims (Loc, |
5339 | Typ => Typ, | |
5340 | Old_Tag_Node => | |
5341 | New_Reference_To | |
5342 | (Node | |
5343 | (First_Elmt | |
cc60bd16 | 5344 | (Access_Disp_Table (Parent_Typ))), Loc), |
acf97c11 | 5345 | New_Tag_Node => New_Reference_To (DT_Ptr, Loc), |
5346 | Num_Prims => Nb_Prims)); | |
5347 | end if; | |
5348 | end; | |
af647dc7 | 5349 | end if; |
d62940bf | 5350 | |
af647dc7 | 5351 | -- Inherit the secondary dispatch tables of the ancestor |
d62940bf | 5352 | |
cc60bd16 | 5353 | if not Is_CPP_Class (Parent_Typ) then |
af647dc7 | 5354 | declare |
5355 | Sec_DT_Ancestor : Elmt_Id := | |
5356 | Next_Elmt | |
acf97c11 | 5357 | (Next_Elmt |
af647dc7 | 5358 | (First_Elmt |
cc60bd16 | 5359 | (Access_Disp_Table (Parent_Typ)))); |
af647dc7 | 5360 | Sec_DT_Typ : Elmt_Id := |
5361 | Next_Elmt | |
acf97c11 | 5362 | (Next_Elmt |
5363 | (First_Elmt | |
5364 | (Access_Disp_Table (Typ)))); | |
af647dc7 | 5365 | |
5366 | procedure Copy_Secondary_DTs (Typ : Entity_Id); | |
5367 | -- Local procedure required to climb through the ancestors | |
5368 | -- and copy the contents of all their secondary dispatch | |
5369 | -- tables. | |
5370 | ||
5371 | ------------------------ | |
5372 | -- Copy_Secondary_DTs -- | |
5373 | ------------------------ | |
5374 | ||
5375 | procedure Copy_Secondary_DTs (Typ : Entity_Id) is | |
5376 | E : Entity_Id; | |
5377 | Iface : Elmt_Id; | |
5378 | ||
5379 | begin | |
5380 | -- Climb to the ancestor (if any) handling private types | |
5381 | ||
5382 | if Present (Full_View (Etype (Typ))) then | |
5383 | if Full_View (Etype (Typ)) /= Typ then | |
5384 | Copy_Secondary_DTs (Full_View (Etype (Typ))); | |
5385 | end if; | |
d62940bf | 5386 | |
af647dc7 | 5387 | elsif Etype (Typ) /= Typ then |
5388 | Copy_Secondary_DTs (Etype (Typ)); | |
5389 | end if; | |
d62940bf | 5390 | |
a652dd51 | 5391 | if Present (Interfaces (Typ)) |
5392 | and then not Is_Empty_Elmt_List (Interfaces (Typ)) | |
af647dc7 | 5393 | then |
a652dd51 | 5394 | Iface := First_Elmt (Interfaces (Typ)); |
af647dc7 | 5395 | E := First_Entity (Typ); |
5396 | while Present (E) | |
5397 | and then Present (Node (Sec_DT_Ancestor)) | |
725a69d2 | 5398 | and then Ekind (Node (Sec_DT_Ancestor)) = E_Constant |
af647dc7 | 5399 | loop |
5400 | if Is_Tag (E) and then Chars (E) /= Name_uTag then | |
cdb1c38f | 5401 | declare |
5402 | Num_Prims : constant Int := | |
5403 | UI_To_Int (DT_Entry_Count (E)); | |
5404 | ||
5405 | begin | |
5406 | if not Is_Interface (Etype (Typ)) then | |
5407 | ||
5408 | -- Inherit first secondary dispatch table | |
5409 | ||
5410 | Append_To (Elab_Code, | |
5411 | Build_Inherit_Predefined_Prims (Loc, | |
5412 | Old_Tag_Node => | |
5413 | Unchecked_Convert_To (RTE (RE_Tag), | |
acf97c11 | 5414 | New_Reference_To |
5415 | (Node | |
5416 | (Next_Elmt (Sec_DT_Ancestor)), | |
5417 | Loc)), | |
cdb1c38f | 5418 | New_Tag_Node => |
5419 | Unchecked_Convert_To (RTE (RE_Tag), | |
5420 | New_Reference_To | |
acf97c11 | 5421 | (Node (Next_Elmt (Sec_DT_Typ)), |
5422 | Loc)))); | |
cdb1c38f | 5423 | |
5424 | if Num_Prims /= 0 then | |
5425 | Append_To (Elab_Code, | |
5426 | Build_Inherit_Prims (Loc, | |
5427 | Typ => Node (Iface), | |
5428 | Old_Tag_Node => | |
5429 | Unchecked_Convert_To | |
5430 | (RTE (RE_Tag), | |
5431 | New_Reference_To | |
5432 | (Node (Sec_DT_Ancestor), | |
5433 | Loc)), | |
5434 | New_Tag_Node => | |
5435 | Unchecked_Convert_To | |
5436 | (RTE (RE_Tag), | |
5437 | New_Reference_To | |
5438 | (Node (Sec_DT_Typ), Loc)), | |
5439 | Num_Prims => Num_Prims)); | |
5440 | end if; | |
5441 | end if; | |
5442 | ||
5443 | Next_Elmt (Sec_DT_Ancestor); | |
5444 | Next_Elmt (Sec_DT_Typ); | |
343d35dc | 5445 | |
acf97c11 | 5446 | -- Skip the secondary dispatch table of |
5447 | -- predefined primitives | |
5448 | ||
5449 | Next_Elmt (Sec_DT_Ancestor); | |
5450 | Next_Elmt (Sec_DT_Typ); | |
5451 | ||
cdb1c38f | 5452 | if not Is_Interface (Etype (Typ)) then |
5453 | ||
5454 | -- Inherit second secondary dispatch table | |
343d35dc | 5455 | |
343d35dc | 5456 | Append_To (Elab_Code, |
5457 | Build_Inherit_Predefined_Prims (Loc, | |
5458 | Old_Tag_Node => | |
5459 | Unchecked_Convert_To (RTE (RE_Tag), | |
5460 | New_Reference_To | |
acf97c11 | 5461 | (Node |
5462 | (Next_Elmt (Sec_DT_Ancestor)), | |
5463 | Loc)), | |
343d35dc | 5464 | New_Tag_Node => |
5465 | Unchecked_Convert_To (RTE (RE_Tag), | |
5466 | New_Reference_To | |
acf97c11 | 5467 | (Node (Next_Elmt (Sec_DT_Typ)), |
5468 | Loc)))); | |
343d35dc | 5469 | |
5470 | if Num_Prims /= 0 then | |
5471 | Append_To (Elab_Code, | |
5472 | Build_Inherit_Prims (Loc, | |
17e14451 | 5473 | Typ => Node (Iface), |
343d35dc | 5474 | Old_Tag_Node => |
5475 | Unchecked_Convert_To | |
5476 | (RTE (RE_Tag), | |
5477 | New_Reference_To | |
5478 | (Node (Sec_DT_Ancestor), | |
5479 | Loc)), | |
5480 | New_Tag_Node => | |
5481 | Unchecked_Convert_To | |
5482 | (RTE (RE_Tag), | |
5483 | New_Reference_To | |
5484 | (Node (Sec_DT_Typ), Loc)), | |
17e14451 | 5485 | Num_Prims => Num_Prims)); |
343d35dc | 5486 | end if; |
cdb1c38f | 5487 | end if; |
5488 | end; | |
af647dc7 | 5489 | |
5490 | Next_Elmt (Sec_DT_Ancestor); | |
5491 | Next_Elmt (Sec_DT_Typ); | |
acf97c11 | 5492 | |
5493 | -- Skip the secondary dispatch table of | |
5494 | -- predefined primitives | |
5495 | ||
5496 | Next_Elmt (Sec_DT_Ancestor); | |
5497 | Next_Elmt (Sec_DT_Typ); | |
5498 | ||
af647dc7 | 5499 | Next_Elmt (Iface); |
5500 | end if; | |
d62940bf | 5501 | |
af647dc7 | 5502 | Next_Entity (E); |
5503 | end loop; | |
5504 | end if; | |
5505 | end Copy_Secondary_DTs; | |
d62940bf | 5506 | |
af647dc7 | 5507 | begin |
725a69d2 | 5508 | if Present (Node (Sec_DT_Ancestor)) |
5509 | and then Ekind (Node (Sec_DT_Ancestor)) = E_Constant | |
5510 | then | |
af647dc7 | 5511 | -- Handle private types |
76a1c25b | 5512 | |
af647dc7 | 5513 | if Present (Full_View (Typ)) then |
5514 | Copy_Secondary_DTs (Full_View (Typ)); | |
5515 | else | |
5516 | Copy_Secondary_DTs (Typ); | |
5517 | end if; | |
76a1c25b | 5518 | end if; |
af647dc7 | 5519 | end; |
5520 | end if; | |
76a1c25b | 5521 | end if; |
343d35dc | 5522 | end if; |
d62940bf | 5523 | |
343d35dc | 5524 | -- Generate code to register the Tag in the External_Tag hash table for |
5525 | -- the pure Ada type only. | |
d62940bf | 5526 | |
343d35dc | 5527 | -- Register_Tag (Dt_Ptr); |
d62940bf | 5528 | |
725a69d2 | 5529 | -- Skip this action in the following cases: |
5530 | -- 1) if Register_Tag is not available. | |
5531 | -- 2) in No_Run_Time mode. | |
2ea346ac | 5532 | -- 3) if Typ is not defined at the library level (this is required |
725a69d2 | 5533 | -- to avoid adding concurrency control to the hash table used |
5534 | -- by the run-time to register the tags). | |
d62940bf | 5535 | |
cdb1c38f | 5536 | if not No_Run_Time_Mode |
5537 | and then Is_Library_Level_Entity (Typ) | |
5538 | and then RTE_Available (RE_Register_Tag) | |
5539 | then | |
725a69d2 | 5540 | Append_To (Elab_Code, |
cdb1c38f | 5541 | Make_Procedure_Call_Statement (Loc, |
5542 | Name => New_Reference_To (RTE (RE_Register_Tag), Loc), | |
5543 | Parameter_Associations => | |
5544 | New_List (New_Reference_To (DT_Ptr, Loc)))); | |
d62940bf | 5545 | end if; |
5546 | ||
2ea346ac | 5547 | if not Is_Empty_List (Elab_Code) then |
5548 | Append_List_To (Result, Elab_Code); | |
5549 | end if; | |
cdb1c38f | 5550 | |
f38c8084 | 5551 | -- Populate the two auxiliary tables used for dispatching asynchronous, |
5552 | -- conditional and timed selects for synchronized types that implement | |
5553 | -- a limited interface. Skip this step in Ravenscar profile or when | |
5554 | -- general dispatching is forbidden. | |
17e14451 | 5555 | |
5556 | if Ada_Version >= Ada_05 | |
5557 | and then Is_Concurrent_Record_Type (Typ) | |
a652dd51 | 5558 | and then Has_Interfaces (Typ) |
f38c8084 | 5559 | and then not Restriction_Active (No_Dispatching_Calls) |
5560 | and then not Restriction_Active (No_Select_Statements) | |
17e14451 | 5561 | then |
5562 | Append_List_To (Result, | |
5563 | Make_Select_Specific_Data_Table (Typ)); | |
5564 | end if; | |
5565 | ||
cc60bd16 | 5566 | -- Remember entities containing dispatch tables |
acf97c11 | 5567 | |
cc60bd16 | 5568 | Append_Elmt (Predef_Prims, DT_Decl); |
5569 | Append_Elmt (DT, DT_Decl); | |
acf97c11 | 5570 | |
725a69d2 | 5571 | Analyze_List (Result, Suppress => All_Checks); |
17e14451 | 5572 | Set_Has_Dispatch_Table (Typ); |
5573 | ||
f301a57b | 5574 | -- Mark entities containing dispatch tables. Required by the backend to |
5575 | -- handle them properly. | |
cc60bd16 | 5576 | |
5577 | if not Is_Interface (Typ) then | |
5578 | declare | |
5579 | Elmt : Elmt_Id; | |
5580 | ||
5581 | begin | |
5582 | -- Ensure that entities Prim_Ptr and Predef_Prims_Table_Ptr have | |
5583 | -- the decoration required by the backend | |
5584 | ||
5585 | Set_Is_Dispatch_Table_Entity (RTE (RE_Prim_Ptr)); | |
5586 | Set_Is_Dispatch_Table_Entity (RTE (RE_Predef_Prims_Table_Ptr)); | |
5587 | ||
5588 | -- Object declarations | |
5589 | ||
5590 | Elmt := First_Elmt (DT_Decl); | |
5591 | while Present (Elmt) loop | |
5592 | Set_Is_Dispatch_Table_Entity (Node (Elmt)); | |
5593 | pragma Assert (Ekind (Etype (Node (Elmt))) = E_Array_Subtype | |
5594 | or else Ekind (Etype (Node (Elmt))) = E_Record_Subtype); | |
5595 | Set_Is_Dispatch_Table_Entity (Etype (Node (Elmt))); | |
5596 | Next_Elmt (Elmt); | |
5597 | end loop; | |
5598 | ||
5599 | -- Aggregates initializing dispatch tables | |
5600 | ||
5601 | Elmt := First_Elmt (DT_Aggr); | |
5602 | while Present (Elmt) loop | |
5603 | Set_Is_Dispatch_Table_Entity (Etype (Node (Elmt))); | |
5604 | Next_Elmt (Elmt); | |
5605 | end loop; | |
5606 | end; | |
5607 | end if; | |
5608 | ||
76a1c25b | 5609 | return Result; |
5610 | end Make_DT; | |
d62940bf | 5611 | |
76a1c25b | 5612 | ------------------------------------- |
5613 | -- Make_Select_Specific_Data_Table -- | |
5614 | ------------------------------------- | |
d62940bf | 5615 | |
76a1c25b | 5616 | function Make_Select_Specific_Data_Table |
5617 | (Typ : Entity_Id) return List_Id | |
5618 | is | |
5619 | Assignments : constant List_Id := New_List; | |
5620 | Loc : constant Source_Ptr := Sloc (Typ); | |
d62940bf | 5621 | |
68f95949 | 5622 | Conc_Typ : Entity_Id; |
5623 | Decls : List_Id; | |
5624 | DT_Ptr : Entity_Id; | |
5625 | Prim : Entity_Id; | |
5626 | Prim_Als : Entity_Id; | |
5627 | Prim_Elmt : Elmt_Id; | |
5628 | Prim_Pos : Uint; | |
343d35dc | 5629 | Nb_Prim : Nat := 0; |
d62940bf | 5630 | |
76a1c25b | 5631 | type Examined_Array is array (Int range <>) of Boolean; |
d62940bf | 5632 | |
76a1c25b | 5633 | function Find_Entry_Index (E : Entity_Id) return Uint; |
5634 | -- Given an entry, find its index in the visible declarations of the | |
5635 | -- corresponding concurrent type of Typ. | |
d62940bf | 5636 | |
76a1c25b | 5637 | ---------------------- |
5638 | -- Find_Entry_Index -- | |
5639 | ---------------------- | |
d62940bf | 5640 | |
76a1c25b | 5641 | function Find_Entry_Index (E : Entity_Id) return Uint is |
5642 | Index : Uint := Uint_1; | |
5643 | Subp_Decl : Entity_Id; | |
d62940bf | 5644 | |
76a1c25b | 5645 | begin |
5646 | if Present (Decls) | |
5647 | and then not Is_Empty_List (Decls) | |
5648 | then | |
5649 | Subp_Decl := First (Decls); | |
5650 | while Present (Subp_Decl) loop | |
5651 | if Nkind (Subp_Decl) = N_Entry_Declaration then | |
5652 | if Defining_Identifier (Subp_Decl) = E then | |
5653 | return Index; | |
5654 | end if; | |
d62940bf | 5655 | |
76a1c25b | 5656 | Index := Index + 1; |
5657 | end if; | |
d62940bf | 5658 | |
76a1c25b | 5659 | Next (Subp_Decl); |
5660 | end loop; | |
5661 | end if; | |
d62940bf | 5662 | |
76a1c25b | 5663 | return Uint_0; |
5664 | end Find_Entry_Index; | |
5665 | ||
5666 | -- Start of processing for Make_Select_Specific_Data_Table | |
5667 | ||
5668 | begin | |
68f95949 | 5669 | pragma Assert (not Restriction_Active (No_Dispatching_Calls)); |
5670 | ||
76a1c25b | 5671 | DT_Ptr := Node (First_Elmt (Access_Disp_Table (Typ))); |
d62940bf | 5672 | |
76a1c25b | 5673 | if Present (Corresponding_Concurrent_Type (Typ)) then |
5674 | Conc_Typ := Corresponding_Concurrent_Type (Typ); | |
5675 | ||
17e14451 | 5676 | if Present (Full_View (Conc_Typ)) then |
5677 | Conc_Typ := Full_View (Conc_Typ); | |
5678 | end if; | |
5679 | ||
76a1c25b | 5680 | if Ekind (Conc_Typ) = E_Protected_Type then |
5681 | Decls := Visible_Declarations (Protected_Definition ( | |
5682 | Parent (Conc_Typ))); | |
d62940bf | 5683 | else |
5684 | pragma Assert (Ekind (Conc_Typ) = E_Task_Type); | |
76a1c25b | 5685 | Decls := Visible_Declarations (Task_Definition ( |
5686 | Parent (Conc_Typ))); | |
5687 | end if; | |
5688 | end if; | |
d62940bf | 5689 | |
76a1c25b | 5690 | -- Count the non-predefined primitive operations |
d62940bf | 5691 | |
76a1c25b | 5692 | Prim_Elmt := First_Elmt (Primitive_Operations (Typ)); |
5693 | while Present (Prim_Elmt) loop | |
af647dc7 | 5694 | Prim := Node (Prim_Elmt); |
5695 | ||
5696 | if not (Is_Predefined_Dispatching_Operation (Prim) | |
5697 | or else Is_Predefined_Dispatching_Alias (Prim)) | |
5698 | then | |
76a1c25b | 5699 | Nb_Prim := Nb_Prim + 1; |
5700 | end if; | |
d62940bf | 5701 | |
76a1c25b | 5702 | Next_Elmt (Prim_Elmt); |
5703 | end loop; | |
d62940bf | 5704 | |
76a1c25b | 5705 | declare |
68f95949 | 5706 | Examined : Examined_Array (1 .. Nb_Prim) := (others => False); |
d62940bf | 5707 | |
76a1c25b | 5708 | begin |
5709 | Prim_Elmt := First_Elmt (Primitive_Operations (Typ)); | |
5710 | while Present (Prim_Elmt) loop | |
5711 | Prim := Node (Prim_Elmt); | |
d62940bf | 5712 | |
af647dc7 | 5713 | -- Look for primitive overriding an abstract interface subprogram |
d62940bf | 5714 | |
a652dd51 | 5715 | if Present (Interface_Alias (Prim)) |
af647dc7 | 5716 | and then not Examined (UI_To_Int (DT_Position (Alias (Prim)))) |
5717 | then | |
5718 | Prim_Pos := DT_Position (Alias (Prim)); | |
5719 | pragma Assert (UI_To_Int (Prim_Pos) <= Nb_Prim); | |
5720 | Examined (UI_To_Int (Prim_Pos)) := True; | |
d62940bf | 5721 | |
af647dc7 | 5722 | -- Set the primitive operation kind regardless of subprogram |
5723 | -- type. Generate: | |
5724 | -- Ada.Tags.Set_Prim_Op_Kind (DT_Ptr, <position>, <kind>); | |
d62940bf | 5725 | |
af647dc7 | 5726 | Append_To (Assignments, |
725a69d2 | 5727 | Make_Procedure_Call_Statement (Loc, |
5728 | Name => New_Reference_To (RTE (RE_Set_Prim_Op_Kind), Loc), | |
5729 | Parameter_Associations => New_List ( | |
5730 | New_Reference_To (DT_Ptr, Loc), | |
5731 | Make_Integer_Literal (Loc, Prim_Pos), | |
5732 | Prim_Op_Kind (Alias (Prim), Typ)))); | |
68f95949 | 5733 | |
af647dc7 | 5734 | -- Retrieve the root of the alias chain |
68f95949 | 5735 | |
af647dc7 | 5736 | Prim_Als := Prim; |
5737 | while Present (Alias (Prim_Als)) loop | |
5738 | Prim_Als := Alias (Prim_Als); | |
5739 | end loop; | |
68f95949 | 5740 | |
af647dc7 | 5741 | -- In the case of an entry wrapper, set the entry index |
68f95949 | 5742 | |
af647dc7 | 5743 | if Ekind (Prim) = E_Procedure |
5744 | and then Is_Primitive_Wrapper (Prim_Als) | |
5745 | and then Ekind (Wrapped_Entity (Prim_Als)) = E_Entry | |
5746 | then | |
5747 | -- Generate: | |
5748 | -- Ada.Tags.Set_Entry_Index | |
5749 | -- (DT_Ptr, <position>, <index>); | |
68f95949 | 5750 | |
af647dc7 | 5751 | Append_To (Assignments, |
725a69d2 | 5752 | Make_Procedure_Call_Statement (Loc, |
5753 | Name => | |
5754 | New_Reference_To (RTE (RE_Set_Entry_Index), Loc), | |
5755 | Parameter_Associations => New_List ( | |
5756 | New_Reference_To (DT_Ptr, Loc), | |
5757 | Make_Integer_Literal (Loc, Prim_Pos), | |
5758 | Make_Integer_Literal (Loc, | |
5759 | Find_Entry_Index (Wrapped_Entity (Prim_Als)))))); | |
76a1c25b | 5760 | end if; |
5761 | end if; | |
5762 | ||
76a1c25b | 5763 | Next_Elmt (Prim_Elmt); |
5764 | end loop; | |
5765 | end; | |
5766 | ||
5767 | return Assignments; | |
5768 | end Make_Select_Specific_Data_Table; | |
d62940bf | 5769 | |
17e14451 | 5770 | --------------- |
5771 | -- Make_Tags -- | |
5772 | --------------- | |
5773 | ||
5774 | function Make_Tags (Typ : Entity_Id) return List_Id is | |
f301a57b | 5775 | Loc : constant Source_Ptr := Sloc (Typ); |
5776 | Result : constant List_Id := New_List; | |
5777 | ||
5778 | procedure Import_DT | |
5779 | (Tag_Typ : Entity_Id; | |
5780 | DT : Entity_Id; | |
5781 | Is_Secondary_DT : Boolean); | |
5782 | -- Import the dispatch table DT of tagged type Tag_Typ. Required to | |
5783 | -- generate forward references and statically allocate the table. For | |
5784 | -- primary dispatch tables that require no dispatch table generate: | |
5785 | -- DT : static aliased constant Non_Dispatch_Table_Wrapper; | |
5786 | -- $pragma import (ada, DT); | |
5787 | -- Otherwise generate: | |
5788 | -- DT : static aliased constant Dispatch_Table_Wrapper (Nb_Prim); | |
5789 | -- $pragma import (ada, DT); | |
7854e190 | 5790 | |
f301a57b | 5791 | --------------- |
5792 | -- Import_DT -- | |
5793 | --------------- | |
24971415 | 5794 | |
f301a57b | 5795 | procedure Import_DT |
5796 | (Tag_Typ : Entity_Id; | |
5797 | DT : Entity_Id; | |
5798 | Is_Secondary_DT : Boolean) | |
5799 | is | |
5800 | DT_Constr_List : List_Id; | |
5801 | Nb_Prim : Nat; | |
24971415 | 5802 | |
f301a57b | 5803 | begin |
5804 | Set_Is_Imported (DT); | |
5805 | Set_Ekind (DT, E_Constant); | |
5806 | Set_Related_Type (DT, Typ); | |
24971415 | 5807 | |
24971415 | 5808 | -- The scope must be set now to call Get_External_Name |
5809 | ||
5810 | Set_Scope (DT, Current_Scope); | |
5811 | ||
5812 | Get_External_Name (DT, True); | |
5813 | Set_Interface_Name (DT, | |
17e14451 | 5814 | Make_String_Literal (Loc, |
5815 | Strval => String_From_Name_Buffer)); | |
5816 | ||
24971415 | 5817 | -- Ensure proper Sprint output of this implicit importation |
17e14451 | 5818 | |
24971415 | 5819 | Set_Is_Internal (DT); |
17e14451 | 5820 | |
24971415 | 5821 | -- Save this entity to allow Make_DT to generate its exportation |
5822 | ||
f301a57b | 5823 | Append_Elmt (DT, Dispatch_Table_Wrappers (Typ)); |
24971415 | 5824 | |
f301a57b | 5825 | -- No dispatch table required |
acf97c11 | 5826 | |
f301a57b | 5827 | if not Is_Secondary_DT |
5828 | and then not Has_DT (Tag_Typ) | |
5829 | then | |
5830 | Append_To (Result, | |
5831 | Make_Object_Declaration (Loc, | |
5832 | Defining_Identifier => DT, | |
5833 | Aliased_Present => True, | |
5834 | Constant_Present => True, | |
5835 | Object_Definition => | |
5836 | New_Reference_To (RTE (RE_No_Dispatch_Table_Wrapper), Loc))); | |
5837 | ||
5838 | else | |
24971415 | 5839 | -- Calculate the number of primitives of the dispatch table and |
5840 | -- the size of the Type_Specific_Data record. | |
5841 | ||
f301a57b | 5842 | Nb_Prim := |
5843 | UI_To_Int (DT_Entry_Count (First_Tag_Component (Tag_Typ))); | |
24971415 | 5844 | |
5845 | -- If the tagged type has no primitives we add a dummy slot | |
5846 | -- whose address will be the tag of this type. | |
5847 | ||
5848 | if Nb_Prim = 0 then | |
5849 | DT_Constr_List := | |
5850 | New_List (Make_Integer_Literal (Loc, 1)); | |
5851 | else | |
5852 | DT_Constr_List := | |
5853 | New_List (Make_Integer_Literal (Loc, Nb_Prim)); | |
5854 | end if; | |
5855 | ||
5856 | Append_To (Result, | |
5857 | Make_Object_Declaration (Loc, | |
5858 | Defining_Identifier => DT, | |
5859 | Aliased_Present => True, | |
5860 | Constant_Present => True, | |
5861 | Object_Definition => | |
5862 | Make_Subtype_Indication (Loc, | |
5863 | Subtype_Mark => | |
5864 | New_Reference_To (RTE (RE_Dispatch_Table_Wrapper), Loc), | |
5865 | Constraint => Make_Index_Or_Discriminant_Constraint (Loc, | |
5866 | Constraints => DT_Constr_List)))); | |
f301a57b | 5867 | end if; |
5868 | end Import_DT; | |
5869 | ||
5870 | -- Local variables | |
5871 | ||
5872 | Tname : constant Name_Id := Chars (Typ); | |
5873 | AI_Tag_Comp : Elmt_Id; | |
5874 | DT : Node_Id; | |
5875 | DT_Ptr : Node_Id; | |
5876 | Predef_Prims_Ptr : Node_Id; | |
5877 | Iface_DT : Node_Id; | |
5878 | Iface_DT_Ptr : Node_Id; | |
5879 | Suffix_Index : Int; | |
5880 | Typ_Name : Name_Id; | |
5881 | Typ_Comps : Elist_Id; | |
5882 | ||
5883 | -- Start of processing for Make_Tags | |
5884 | ||
5885 | begin | |
5886 | -- 1) Generate the primary and secondary tag entities | |
24971415 | 5887 | |
f301a57b | 5888 | -- Collect the components associated with secondary dispatch tables |
5889 | ||
5890 | if Has_Interfaces (Typ) then | |
5891 | Collect_Interface_Components (Typ, Typ_Comps); | |
5892 | end if; | |
5893 | ||
5894 | -- 1) Generate the primary tag entities | |
5895 | ||
5896 | -- Primary dispatch table containing user-defined primitives | |
5897 | ||
5898 | DT_Ptr := Make_Defining_Identifier (Loc, | |
5899 | New_External_Name (Tname, 'P')); | |
5900 | Set_Etype (DT_Ptr, RTE (RE_Tag)); | |
5901 | ||
5902 | -- Primary dispatch table containing predefined primitives | |
5903 | ||
5904 | Predef_Prims_Ptr := | |
5905 | Make_Defining_Identifier (Loc, | |
5906 | Chars => New_External_Name (Tname, 'Y')); | |
5907 | Set_Etype (Predef_Prims_Ptr, RTE (RE_Address)); | |
5908 | ||
5909 | -- Import the forward declaration of the Dispatch Table wrapper record | |
5910 | -- (Make_DT will take care of its exportation) | |
5911 | ||
5912 | if Building_Static_DT (Typ) then | |
5913 | Set_Dispatch_Table_Wrappers (Typ, New_Elmt_List); | |
5914 | ||
5915 | DT := | |
5916 | Make_Defining_Identifier (Loc, | |
5917 | Chars => New_External_Name (Tname, 'T')); | |
5918 | ||
5919 | Import_DT (Typ, DT, Is_Secondary_DT => False); | |
5920 | ||
5921 | if Has_DT (Typ) then | |
24971415 | 5922 | Append_To (Result, |
5923 | Make_Object_Declaration (Loc, | |
5924 | Defining_Identifier => DT_Ptr, | |
5925 | Constant_Present => True, | |
5926 | Object_Definition => New_Reference_To (RTE (RE_Tag), Loc), | |
5927 | Expression => | |
5928 | Unchecked_Convert_To (RTE (RE_Tag), | |
5929 | Make_Attribute_Reference (Loc, | |
5930 | Prefix => | |
5931 | Make_Selected_Component (Loc, | |
5932 | Prefix => New_Reference_To (DT, Loc), | |
5933 | Selector_Name => | |
5934 | New_Occurrence_Of | |
5935 | (RTE_Record_Component (RE_Prims_Ptr), Loc)), | |
5936 | Attribute_Name => Name_Address)))); | |
5937 | ||
acf97c11 | 5938 | Append_To (Result, |
5939 | Make_Object_Declaration (Loc, | |
5940 | Defining_Identifier => Predef_Prims_Ptr, | |
5941 | Constant_Present => True, | |
5942 | Object_Definition => New_Reference_To | |
5943 | (RTE (RE_Address), Loc), | |
5944 | Expression => | |
5945 | Make_Attribute_Reference (Loc, | |
5946 | Prefix => | |
5947 | Make_Selected_Component (Loc, | |
5948 | Prefix => New_Reference_To (DT, Loc), | |
5949 | Selector_Name => | |
5950 | New_Occurrence_Of | |
5951 | (RTE_Record_Component (RE_Predef_Prims), Loc)), | |
5952 | Attribute_Name => Name_Address))); | |
5953 | ||
24971415 | 5954 | -- No dispatch table required |
5955 | ||
5956 | else | |
24971415 | 5957 | Append_To (Result, |
5958 | Make_Object_Declaration (Loc, | |
5959 | Defining_Identifier => DT_Ptr, | |
5960 | Constant_Present => True, | |
5961 | Object_Definition => New_Reference_To (RTE (RE_Tag), Loc), | |
5962 | Expression => | |
5963 | Unchecked_Convert_To (RTE (RE_Tag), | |
5964 | Make_Attribute_Reference (Loc, | |
5965 | Prefix => | |
5966 | Make_Selected_Component (Loc, | |
5967 | Prefix => New_Reference_To (DT, Loc), | |
5968 | Selector_Name => | |
5969 | New_Occurrence_Of | |
5970 | (RTE_Record_Component (RE_NDT_Prims_Ptr), Loc)), | |
5971 | Attribute_Name => Name_Address)))); | |
5972 | end if; | |
5973 | ||
5974 | Set_Is_True_Constant (DT_Ptr); | |
e7e688dd | 5975 | Set_Is_Statically_Allocated (DT_Ptr); |
17e14451 | 5976 | end if; |
5977 | ||
5978 | pragma Assert (No (Access_Disp_Table (Typ))); | |
5979 | Set_Access_Disp_Table (Typ, New_Elmt_List); | |
5980 | Append_Elmt (DT_Ptr, Access_Disp_Table (Typ)); | |
acf97c11 | 5981 | Append_Elmt (Predef_Prims_Ptr, Access_Disp_Table (Typ)); |
17e14451 | 5982 | |
5983 | -- 2) Generate the secondary tag entities | |
5984 | ||
a652dd51 | 5985 | if Has_Interfaces (Typ) then |
f301a57b | 5986 | |
5987 | -- Note: The following value of Suffix_Index must be in sync with | |
5988 | -- the Suffix_Index values of secondary dispatch tables generated | |
5989 | -- by Make_DT. | |
5990 | ||
5991 | Suffix_Index := 1; | |
17e14451 | 5992 | |
5993 | -- For each interface type we build an unique external name | |
5994 | -- associated with its corresponding secondary dispatch table. | |
5995 | -- This external name will be used to declare an object that | |
5996 | -- references this secondary dispatch table, value that will be | |
5997 | -- used for the elaboration of Typ's objects and also for the | |
5998 | -- elaboration of objects of derivations of Typ that do not | |
5999 | -- override the primitive operation of this interface type. | |
6000 | ||
6001 | AI_Tag_Comp := First_Elmt (Typ_Comps); | |
6002 | while Present (AI_Tag_Comp) loop | |
6003 | Get_Secondary_DT_External_Name | |
cdb1c38f | 6004 | (Typ, Related_Type (Node (AI_Tag_Comp)), Suffix_Index); |
cdb1c38f | 6005 | Typ_Name := Name_Find; |
17e14451 | 6006 | |
f301a57b | 6007 | if Building_Static_DT (Typ) then |
6008 | Iface_DT := | |
6009 | Make_Defining_Identifier (Loc, | |
6010 | Chars => New_External_Name | |
6011 | (Typ_Name, 'T', Suffix_Index => -1)); | |
6012 | Import_DT | |
6013 | (Tag_Typ => Related_Type (Node (AI_Tag_Comp)), | |
6014 | DT => Iface_DT, | |
6015 | Is_Secondary_DT => True); | |
6016 | end if; | |
6017 | ||
acf97c11 | 6018 | -- Secondary dispatch table referencing thunks to user-defined |
6019 | -- primitives covered by this interface. | |
6020 | ||
17e14451 | 6021 | Iface_DT_Ptr := |
6022 | Make_Defining_Identifier (Loc, | |
6023 | Chars => New_External_Name (Typ_Name, 'P')); | |
6024 | Set_Etype (Iface_DT_Ptr, RTE (RE_Interface_Tag)); | |
6025 | Set_Ekind (Iface_DT_Ptr, E_Constant); | |
cdb1c38f | 6026 | Set_Is_Tag (Iface_DT_Ptr); |
6027 | Set_Has_Thunks (Iface_DT_Ptr); | |
2ea346ac | 6028 | Set_Is_Statically_Allocated (Iface_DT_Ptr, |
6029 | Is_Library_Level_Tagged_Type (Typ)); | |
17e14451 | 6030 | Set_Is_True_Constant (Iface_DT_Ptr); |
cdb1c38f | 6031 | Set_Related_Type |
6032 | (Iface_DT_Ptr, Related_Type (Node (AI_Tag_Comp))); | |
6033 | Append_Elmt (Iface_DT_Ptr, Access_Disp_Table (Typ)); | |
6034 | ||
f301a57b | 6035 | if Building_Static_DT (Typ) then |
6036 | Append_To (Result, | |
6037 | Make_Object_Declaration (Loc, | |
6038 | Defining_Identifier => Iface_DT_Ptr, | |
6039 | Constant_Present => True, | |
6040 | Object_Definition => New_Reference_To | |
6041 | (RTE (RE_Interface_Tag), Loc), | |
6042 | Expression => | |
6043 | Unchecked_Convert_To (RTE (RE_Interface_Tag), | |
6044 | Make_Attribute_Reference (Loc, | |
6045 | Prefix => | |
6046 | Make_Selected_Component (Loc, | |
6047 | Prefix => New_Reference_To (Iface_DT, Loc), | |
6048 | Selector_Name => | |
6049 | New_Occurrence_Of | |
6050 | (RTE_Record_Component (RE_Prims_Ptr), Loc)), | |
6051 | Attribute_Name => Name_Address)))); | |
6052 | end if; | |
6053 | ||
acf97c11 | 6054 | -- Secondary dispatch table referencing thunks to predefined |
6055 | -- primitives. | |
6056 | ||
6057 | Iface_DT_Ptr := | |
6058 | Make_Defining_Identifier (Loc, | |
6059 | Chars => New_External_Name (Typ_Name, 'Y')); | |
6060 | Set_Etype (Iface_DT_Ptr, RTE (RE_Address)); | |
6061 | Set_Ekind (Iface_DT_Ptr, E_Constant); | |
6062 | Set_Is_Tag (Iface_DT_Ptr); | |
6063 | Set_Has_Thunks (Iface_DT_Ptr); | |
2ea346ac | 6064 | Set_Is_Statically_Allocated (Iface_DT_Ptr, |
6065 | Is_Library_Level_Tagged_Type (Typ)); | |
acf97c11 | 6066 | Set_Is_True_Constant (Iface_DT_Ptr); |
6067 | Set_Related_Type | |
6068 | (Iface_DT_Ptr, Related_Type (Node (AI_Tag_Comp))); | |
6069 | Append_Elmt (Iface_DT_Ptr, Access_Disp_Table (Typ)); | |
6070 | ||
6071 | -- Secondary dispatch table referencing user-defined primitives | |
6072 | -- covered by this interface. | |
6073 | ||
cdb1c38f | 6074 | Iface_DT_Ptr := |
6075 | Make_Defining_Identifier (Loc, | |
6076 | Chars => New_External_Name (Typ_Name, 'D')); | |
6077 | Set_Etype (Iface_DT_Ptr, RTE (RE_Interface_Tag)); | |
6078 | Set_Ekind (Iface_DT_Ptr, E_Constant); | |
6079 | Set_Is_Tag (Iface_DT_Ptr); | |
2ea346ac | 6080 | Set_Is_Statically_Allocated (Iface_DT_Ptr, |
6081 | Is_Library_Level_Tagged_Type (Typ)); | |
cdb1c38f | 6082 | Set_Is_True_Constant (Iface_DT_Ptr); |
6083 | Set_Related_Type | |
6084 | (Iface_DT_Ptr, Related_Type (Node (AI_Tag_Comp))); | |
17e14451 | 6085 | Append_Elmt (Iface_DT_Ptr, Access_Disp_Table (Typ)); |
6086 | ||
acf97c11 | 6087 | -- Secondary dispatch table referencing predefined primitives |
6088 | ||
6089 | Iface_DT_Ptr := | |
6090 | Make_Defining_Identifier (Loc, | |
6091 | Chars => New_External_Name (Typ_Name, 'Z')); | |
6092 | Set_Etype (Iface_DT_Ptr, RTE (RE_Address)); | |
6093 | Set_Ekind (Iface_DT_Ptr, E_Constant); | |
6094 | Set_Is_Tag (Iface_DT_Ptr); | |
2ea346ac | 6095 | Set_Is_Statically_Allocated (Iface_DT_Ptr, |
6096 | Is_Library_Level_Tagged_Type (Typ)); | |
acf97c11 | 6097 | Set_Is_True_Constant (Iface_DT_Ptr); |
6098 | Set_Related_Type | |
6099 | (Iface_DT_Ptr, Related_Type (Node (AI_Tag_Comp))); | |
6100 | Append_Elmt (Iface_DT_Ptr, Access_Disp_Table (Typ)); | |
6101 | ||
17e14451 | 6102 | Next_Elmt (AI_Tag_Comp); |
6103 | end loop; | |
6104 | end if; | |
6105 | ||
6106 | -- 3) At the end of Access_Disp_Table we add the entity of an access | |
6107 | -- type declaration. It is used by Build_Get_Prim_Op_Address to | |
6108 | -- expand dispatching calls through the primary dispatch table. | |
6109 | ||
6110 | -- Generate: | |
cc60bd16 | 6111 | -- type Typ_DT is array (1 .. Nb_Prims) of Prim_Ptr; |
17e14451 | 6112 | -- type Typ_DT_Acc is access Typ_DT; |
6113 | ||
6114 | declare | |
6115 | Name_DT_Prims : constant Name_Id := | |
6116 | New_External_Name (Tname, 'G'); | |
6117 | Name_DT_Prims_Acc : constant Name_Id := | |
6118 | New_External_Name (Tname, 'H'); | |
6119 | DT_Prims : constant Entity_Id := | |
6120 | Make_Defining_Identifier (Loc, Name_DT_Prims); | |
6121 | DT_Prims_Acc : constant Entity_Id := | |
6122 | Make_Defining_Identifier (Loc, | |
6123 | Name_DT_Prims_Acc); | |
6124 | begin | |
6125 | Append_To (Result, | |
6126 | Make_Full_Type_Declaration (Loc, | |
6127 | Defining_Identifier => DT_Prims, | |
6128 | Type_Definition => | |
6129 | Make_Constrained_Array_Definition (Loc, | |
6130 | Discrete_Subtype_Definitions => New_List ( | |
6131 | Make_Range (Loc, | |
6132 | Low_Bound => Make_Integer_Literal (Loc, 1), | |
6133 | High_Bound => Make_Integer_Literal (Loc, | |
6134 | DT_Entry_Count | |
6135 | (First_Tag_Component (Typ))))), | |
6136 | Component_Definition => | |
6137 | Make_Component_Definition (Loc, | |
6138 | Subtype_Indication => | |
cc60bd16 | 6139 | New_Reference_To (RTE (RE_Prim_Ptr), Loc))))); |
17e14451 | 6140 | |
6141 | Append_To (Result, | |
6142 | Make_Full_Type_Declaration (Loc, | |
6143 | Defining_Identifier => DT_Prims_Acc, | |
6144 | Type_Definition => | |
6145 | Make_Access_To_Object_Definition (Loc, | |
6146 | Subtype_Indication => | |
6147 | New_Occurrence_Of (DT_Prims, Loc)))); | |
6148 | ||
6149 | Append_Elmt (DT_Prims_Acc, Access_Disp_Table (Typ)); | |
6150 | ||
6151 | -- Analyze the resulting list and suppress the generation of the | |
6152 | -- Init_Proc associated with the above array declaration because | |
6153 | -- we never use such type in object declarations; this type is only | |
6154 | -- used to simplify the expansion associated with dispatching calls. | |
6155 | ||
6156 | Analyze_List (Result); | |
6157 | Set_Suppress_Init_Proc (Base_Type (DT_Prims)); | |
cc60bd16 | 6158 | |
6159 | -- Mark entity of dispatch table. Required by the backend to handle | |
6160 | -- the properly. | |
6161 | ||
6162 | Set_Is_Dispatch_Table_Entity (DT_Prims); | |
17e14451 | 6163 | end; |
6164 | ||
cdb1c38f | 6165 | Set_Ekind (DT_Ptr, E_Constant); |
6166 | Set_Is_Tag (DT_Ptr); | |
6167 | Set_Related_Type (DT_Ptr, Typ); | |
6168 | ||
17e14451 | 6169 | return Result; |
6170 | end Make_Tags; | |
6171 | ||
ee6ba406 | 6172 | ----------------------------------- |
6173 | -- Original_View_In_Visible_Part -- | |
6174 | ----------------------------------- | |
6175 | ||
6176 | function Original_View_In_Visible_Part (Typ : Entity_Id) return Boolean is | |
6177 | Scop : constant Entity_Id := Scope (Typ); | |
6178 | ||
6179 | begin | |
6180 | -- The scope must be a package | |
6181 | ||
65149aa0 | 6182 | if not Is_Package_Or_Generic_Package (Scop) then |
ee6ba406 | 6183 | return False; |
6184 | end if; | |
6185 | ||
6186 | -- A type with a private declaration has a private view declared in | |
6187 | -- the visible part. | |
6188 | ||
6189 | if Has_Private_Declaration (Typ) then | |
6190 | return True; | |
6191 | end if; | |
6192 | ||
6193 | return List_Containing (Parent (Typ)) = | |
6194 | Visible_Declarations (Specification (Unit_Declaration_Node (Scop))); | |
6195 | end Original_View_In_Visible_Part; | |
6196 | ||
d62940bf | 6197 | ------------------ |
6198 | -- Prim_Op_Kind -- | |
6199 | ------------------ | |
6200 | ||
6201 | function Prim_Op_Kind | |
6202 | (Prim : Entity_Id; | |
6203 | Typ : Entity_Id) return Node_Id | |
6204 | is | |
6205 | Full_Typ : Entity_Id := Typ; | |
6206 | Loc : constant Source_Ptr := Sloc (Prim); | |
68f95949 | 6207 | Prim_Op : Entity_Id; |
d62940bf | 6208 | |
6209 | begin | |
6210 | -- Retrieve the original primitive operation | |
6211 | ||
68f95949 | 6212 | Prim_Op := Prim; |
d62940bf | 6213 | while Present (Alias (Prim_Op)) loop |
6214 | Prim_Op := Alias (Prim_Op); | |
6215 | end loop; | |
6216 | ||
6217 | if Ekind (Typ) = E_Record_Type | |
6218 | and then Present (Corresponding_Concurrent_Type (Typ)) | |
6219 | then | |
6220 | Full_Typ := Corresponding_Concurrent_Type (Typ); | |
6221 | end if; | |
6222 | ||
d77e048b | 6223 | -- When a private tagged type is completed by a concurrent type, |
6224 | -- retrieve the full view. | |
6225 | ||
6226 | if Is_Private_Type (Full_Typ) then | |
6227 | Full_Typ := Full_View (Full_Typ); | |
6228 | end if; | |
6229 | ||
d62940bf | 6230 | if Ekind (Prim_Op) = E_Function then |
6231 | ||
6232 | -- Protected function | |
6233 | ||
6234 | if Ekind (Full_Typ) = E_Protected_Type then | |
6235 | return New_Reference_To (RTE (RE_POK_Protected_Function), Loc); | |
6236 | ||
76a1c25b | 6237 | -- Task function |
6238 | ||
6239 | elsif Ekind (Full_Typ) = E_Task_Type then | |
6240 | return New_Reference_To (RTE (RE_POK_Task_Function), Loc); | |
6241 | ||
d62940bf | 6242 | -- Regular function |
6243 | ||
6244 | else | |
6245 | return New_Reference_To (RTE (RE_POK_Function), Loc); | |
6246 | end if; | |
6247 | ||
6248 | else | |
6249 | pragma Assert (Ekind (Prim_Op) = E_Procedure); | |
6250 | ||
6251 | if Ekind (Full_Typ) = E_Protected_Type then | |
6252 | ||
6253 | -- Protected entry | |
6254 | ||
6255 | if Is_Primitive_Wrapper (Prim_Op) | |
6256 | and then Ekind (Wrapped_Entity (Prim_Op)) = E_Entry | |
6257 | then | |
6258 | return New_Reference_To (RTE (RE_POK_Protected_Entry), Loc); | |
6259 | ||
6260 | -- Protected procedure | |
6261 | ||
6262 | else | |
6263 | return New_Reference_To (RTE (RE_POK_Protected_Procedure), Loc); | |
6264 | end if; | |
6265 | ||
6266 | elsif Ekind (Full_Typ) = E_Task_Type then | |
6267 | ||
6268 | -- Task entry | |
6269 | ||
6270 | if Is_Primitive_Wrapper (Prim_Op) | |
6271 | and then Ekind (Wrapped_Entity (Prim_Op)) = E_Entry | |
6272 | then | |
6273 | return New_Reference_To (RTE (RE_POK_Task_Entry), Loc); | |
6274 | ||
6275 | -- Task "procedure". These are the internally Expander-generated | |
6276 | -- procedures (task body for instance). | |
6277 | ||
6278 | else | |
6279 | return New_Reference_To (RTE (RE_POK_Task_Procedure), Loc); | |
6280 | end if; | |
6281 | ||
6282 | -- Regular procedure | |
6283 | ||
6284 | else | |
6285 | return New_Reference_To (RTE (RE_POK_Procedure), Loc); | |
6286 | end if; | |
6287 | end if; | |
6288 | end Prim_Op_Kind; | |
6289 | ||
725a69d2 | 6290 | ------------------------ |
6291 | -- Register_Primitive -- | |
6292 | ------------------------ | |
6293 | ||
49260fa5 | 6294 | function Register_Primitive |
725a69d2 | 6295 | (Loc : Source_Ptr; |
49260fa5 | 6296 | Prim : Entity_Id) return List_Id |
725a69d2 | 6297 | is |
cdb1c38f | 6298 | DT_Ptr : Entity_Id; |
6299 | Iface_Prim : Entity_Id; | |
6300 | Iface_Typ : Entity_Id; | |
6301 | Iface_DT_Ptr : Entity_Id; | |
6302 | Iface_DT_Elmt : Elmt_Id; | |
49260fa5 | 6303 | L : constant List_Id := New_List; |
cdb1c38f | 6304 | Pos : Uint; |
6305 | Tag : Entity_Id; | |
cc60bd16 | 6306 | Tag_Typ : Entity_Id; |
cdb1c38f | 6307 | Thunk_Id : Entity_Id; |
6308 | Thunk_Code : Node_Id; | |
725a69d2 | 6309 | |
6310 | begin | |
6311 | pragma Assert (not Restriction_Active (No_Dispatching_Calls)); | |
6312 | ||
6313 | if not RTE_Available (RE_Tag) then | |
49260fa5 | 6314 | return L; |
725a69d2 | 6315 | end if; |
6316 | ||
a652dd51 | 6317 | if not Present (Interface_Alias (Prim)) then |
cc60bd16 | 6318 | Tag_Typ := Scope (DTC_Entity (Prim)); |
acf97c11 | 6319 | Pos := DT_Position (Prim); |
cc60bd16 | 6320 | Tag := First_Tag_Component (Tag_Typ); |
725a69d2 | 6321 | |
6322 | if Is_Predefined_Dispatching_Operation (Prim) | |
6323 | or else Is_Predefined_Dispatching_Alias (Prim) | |
6324 | then | |
cc60bd16 | 6325 | DT_Ptr := |
6326 | Node (Next_Elmt (First_Elmt (Access_Disp_Table (Tag_Typ)))); | |
6327 | ||
49260fa5 | 6328 | Append_To (L, |
725a69d2 | 6329 | Build_Set_Predefined_Prim_Op_Address (Loc, |
6330 | Tag_Node => New_Reference_To (DT_Ptr, Loc), | |
6331 | Position => Pos, | |
acf97c11 | 6332 | Address_Node => |
cc60bd16 | 6333 | Unchecked_Convert_To (RTE (RE_Prim_Ptr), |
acf97c11 | 6334 | Make_Attribute_Reference (Loc, |
6335 | Prefix => New_Reference_To (Prim, Loc), | |
6336 | Attribute_Name => Name_Unrestricted_Access)))); | |
725a69d2 | 6337 | |
9e7de1e1 | 6338 | -- Register copy of the pointer to the 'size primitive in the TSD |
cc60bd16 | 6339 | |
6340 | if Chars (Prim) = Name_uSize | |
6341 | and then RTE_Record_Component_Available (RE_Size_Func) | |
6342 | then | |
6343 | DT_Ptr := Node (First_Elmt (Access_Disp_Table (Tag_Typ))); | |
49260fa5 | 6344 | Append_To (L, |
cc60bd16 | 6345 | Build_Set_Size_Function (Loc, |
6346 | Tag_Node => New_Reference_To (DT_Ptr, Loc), | |
6347 | Size_Func => Prim)); | |
6348 | end if; | |
6349 | ||
725a69d2 | 6350 | else |
6351 | pragma Assert (Pos /= Uint_0 and then Pos <= DT_Entry_Count (Tag)); | |
6352 | ||
cc60bd16 | 6353 | DT_Ptr := Node (First_Elmt (Access_Disp_Table (Tag_Typ))); |
49260fa5 | 6354 | Append_To (L, |
725a69d2 | 6355 | Build_Set_Prim_Op_Address (Loc, |
cc60bd16 | 6356 | Typ => Tag_Typ, |
725a69d2 | 6357 | Tag_Node => New_Reference_To (DT_Ptr, Loc), |
6358 | Position => Pos, | |
acf97c11 | 6359 | Address_Node => |
cc60bd16 | 6360 | Unchecked_Convert_To (RTE (RE_Prim_Ptr), |
acf97c11 | 6361 | Make_Attribute_Reference (Loc, |
6362 | Prefix => New_Reference_To (Prim, Loc), | |
6363 | Attribute_Name => Name_Unrestricted_Access)))); | |
725a69d2 | 6364 | end if; |
6365 | ||
6366 | -- Ada 2005 (AI-251): Primitive associated with an interface type | |
6367 | -- Generate the code of the thunk only if the interface type is not an | |
6368 | -- immediate ancestor of Typ; otherwise the dispatch table associated | |
6369 | -- with the interface is the primary dispatch table and we have nothing | |
6370 | -- else to do here. | |
6371 | ||
6372 | else | |
cc60bd16 | 6373 | Tag_Typ := Find_Dispatching_Type (Alias (Prim)); |
a652dd51 | 6374 | Iface_Typ := Find_Dispatching_Type (Interface_Alias (Prim)); |
725a69d2 | 6375 | |
6376 | pragma Assert (Is_Interface (Iface_Typ)); | |
6377 | ||
17e14451 | 6378 | Expand_Interface_Thunk (Prim, Thunk_Id, Thunk_Code); |
725a69d2 | 6379 | |
a652dd51 | 6380 | if not Is_Ancestor (Iface_Typ, Tag_Typ) |
725a69d2 | 6381 | and then Present (Thunk_Code) |
6382 | then | |
725a69d2 | 6383 | -- Generate the code necessary to fill the appropriate entry of |
6384 | -- the secondary dispatch table of Prim's controlling type with | |
6385 | -- Thunk_Id's address. | |
6386 | ||
cc60bd16 | 6387 | Iface_DT_Elmt := Find_Interface_ADT (Tag_Typ, Iface_Typ); |
cdb1c38f | 6388 | Iface_DT_Ptr := Node (Iface_DT_Elmt); |
6389 | pragma Assert (Has_Thunks (Iface_DT_Ptr)); | |
6390 | ||
a652dd51 | 6391 | Iface_Prim := Interface_Alias (Prim); |
acf97c11 | 6392 | Pos := DT_Position (Iface_Prim); |
6393 | Tag := First_Tag_Component (Iface_Typ); | |
49260fa5 | 6394 | |
6395 | Prepend_To (L, Thunk_Code); | |
725a69d2 | 6396 | |
6397 | if Is_Predefined_Dispatching_Operation (Prim) | |
6398 | or else Is_Predefined_Dispatching_Alias (Prim) | |
6399 | then | |
cdb1c38f | 6400 | Append_To (L, |
725a69d2 | 6401 | Build_Set_Predefined_Prim_Op_Address (Loc, |
acf97c11 | 6402 | Tag_Node => |
6403 | New_Reference_To (Node (Next_Elmt (Iface_DT_Elmt)), Loc), | |
725a69d2 | 6404 | Position => Pos, |
6405 | Address_Node => | |
cc60bd16 | 6406 | Unchecked_Convert_To (RTE (RE_Prim_Ptr), |
acf97c11 | 6407 | Make_Attribute_Reference (Loc, |
6408 | Prefix => New_Reference_To (Thunk_Id, Loc), | |
6409 | Attribute_Name => Name_Unrestricted_Access)))); | |
cdb1c38f | 6410 | |
acf97c11 | 6411 | Next_Elmt (Iface_DT_Elmt); |
cdb1c38f | 6412 | Next_Elmt (Iface_DT_Elmt); |
6413 | Iface_DT_Ptr := Node (Iface_DT_Elmt); | |
6414 | pragma Assert (not Has_Thunks (Iface_DT_Ptr)); | |
6415 | ||
6416 | Append_To (L, | |
6417 | Build_Set_Predefined_Prim_Op_Address (Loc, | |
acf97c11 | 6418 | Tag_Node => |
6419 | New_Reference_To (Node (Next_Elmt (Iface_DT_Elmt)), Loc), | |
cdb1c38f | 6420 | Position => Pos, |
6421 | Address_Node => | |
cc60bd16 | 6422 | Unchecked_Convert_To (RTE (RE_Prim_Ptr), |
acf97c11 | 6423 | Make_Attribute_Reference (Loc, |
6424 | Prefix => New_Reference_To (Alias (Prim), Loc), | |
6425 | Attribute_Name => Name_Unrestricted_Access)))); | |
cdb1c38f | 6426 | |
725a69d2 | 6427 | else |
6428 | pragma Assert (Pos /= Uint_0 | |
6429 | and then Pos <= DT_Entry_Count (Tag)); | |
6430 | ||
cdb1c38f | 6431 | Append_To (L, |
6432 | Build_Set_Prim_Op_Address (Loc, | |
6433 | Typ => Iface_Typ, | |
6434 | Tag_Node => New_Reference_To (Iface_DT_Ptr, Loc), | |
6435 | Position => Pos, | |
acf97c11 | 6436 | Address_Node => |
cc60bd16 | 6437 | Unchecked_Convert_To (RTE (RE_Prim_Ptr), |
acf97c11 | 6438 | Make_Attribute_Reference (Loc, |
6439 | Prefix => New_Reference_To (Thunk_Id, Loc), | |
6440 | Attribute_Name => Name_Unrestricted_Access)))); | |
cdb1c38f | 6441 | |
acf97c11 | 6442 | Next_Elmt (Iface_DT_Elmt); |
cdb1c38f | 6443 | Next_Elmt (Iface_DT_Elmt); |
6444 | Iface_DT_Ptr := Node (Iface_DT_Elmt); | |
6445 | pragma Assert (not Has_Thunks (Iface_DT_Ptr)); | |
6446 | ||
6447 | Append_To (L, | |
725a69d2 | 6448 | Build_Set_Prim_Op_Address (Loc, |
6449 | Typ => Iface_Typ, | |
6450 | Tag_Node => New_Reference_To (Iface_DT_Ptr, Loc), | |
6451 | Position => Pos, | |
acf97c11 | 6452 | Address_Node => |
cc60bd16 | 6453 | Unchecked_Convert_To (RTE (RE_Prim_Ptr), |
acf97c11 | 6454 | Make_Attribute_Reference (Loc, |
6455 | Prefix => New_Reference_To (Alias (Prim), Loc), | |
6456 | Attribute_Name => Name_Unrestricted_Access)))); | |
cdb1c38f | 6457 | |
725a69d2 | 6458 | end if; |
6459 | end if; | |
6460 | end if; | |
49260fa5 | 6461 | |
6462 | return L; | |
725a69d2 | 6463 | end Register_Primitive; |
6464 | ||
ee6ba406 | 6465 | ------------------------- |
6466 | -- Set_All_DT_Position -- | |
6467 | ------------------------- | |
6468 | ||
6469 | procedure Set_All_DT_Position (Typ : Entity_Id) is | |
ee6ba406 | 6470 | |
aad6babd | 6471 | procedure Validate_Position (Prim : Entity_Id); |
36b938a3 | 6472 | -- Check that the position assigned to Prim is completely safe |
aad6babd | 6473 | -- (it has not been assigned to a previously defined primitive |
6474 | -- operation of Typ) | |
6475 | ||
6476 | ----------------------- | |
6477 | -- Validate_Position -- | |
6478 | ----------------------- | |
6479 | ||
6480 | procedure Validate_Position (Prim : Entity_Id) is | |
af647dc7 | 6481 | Op_Elmt : Elmt_Id; |
6482 | Op : Entity_Id; | |
d62940bf | 6483 | |
aad6babd | 6484 | begin |
af647dc7 | 6485 | -- Aliased primitives are safe |
6486 | ||
6487 | if Present (Alias (Prim)) then | |
6488 | return; | |
6489 | end if; | |
6490 | ||
6491 | Op_Elmt := First_Elmt (Primitive_Operations (Typ)); | |
6492 | while Present (Op_Elmt) loop | |
6493 | Op := Node (Op_Elmt); | |
6494 | ||
6495 | -- No need to check against itself | |
6496 | ||
6497 | if Op = Prim then | |
6498 | null; | |
6499 | ||
aad6babd | 6500 | -- Primitive operations covering abstract interfaces are |
6501 | -- allocated later | |
6502 | ||
a652dd51 | 6503 | elsif Present (Interface_Alias (Op)) then |
aad6babd | 6504 | null; |
6505 | ||
68f95949 | 6506 | -- Predefined dispatching operations are completely safe. They |
6507 | -- are allocated at fixed positions in a separate table. | |
aad6babd | 6508 | |
af647dc7 | 6509 | elsif Is_Predefined_Dispatching_Operation (Op) |
6510 | or else Is_Predefined_Dispatching_Alias (Op) | |
6511 | then | |
aad6babd | 6512 | null; |
ee6ba406 | 6513 | |
aad6babd | 6514 | -- Aliased subprograms are safe |
6515 | ||
af647dc7 | 6516 | elsif Present (Alias (Op)) then |
aad6babd | 6517 | null; |
6518 | ||
af647dc7 | 6519 | elsif DT_Position (Op) = DT_Position (Prim) |
6520 | and then not Is_Predefined_Dispatching_Operation (Op) | |
6521 | and then not Is_Predefined_Dispatching_Operation (Prim) | |
6522 | and then not Is_Predefined_Dispatching_Alias (Op) | |
6523 | and then not Is_Predefined_Dispatching_Alias (Prim) | |
6524 | then | |
d62940bf | 6525 | |
6526 | -- Handle aliased subprograms | |
6527 | ||
6528 | declare | |
6529 | Op_1 : Entity_Id; | |
6530 | Op_2 : Entity_Id; | |
6531 | ||
6532 | begin | |
af647dc7 | 6533 | Op_1 := Op; |
d62940bf | 6534 | loop |
6535 | if Present (Overridden_Operation (Op_1)) then | |
6536 | Op_1 := Overridden_Operation (Op_1); | |
6537 | elsif Present (Alias (Op_1)) then | |
6538 | Op_1 := Alias (Op_1); | |
6539 | else | |
6540 | exit; | |
6541 | end if; | |
6542 | end loop; | |
6543 | ||
6544 | Op_2 := Prim; | |
6545 | loop | |
6546 | if Present (Overridden_Operation (Op_2)) then | |
6547 | Op_2 := Overridden_Operation (Op_2); | |
6548 | elsif Present (Alias (Op_2)) then | |
6549 | Op_2 := Alias (Op_2); | |
6550 | else | |
6551 | exit; | |
6552 | end if; | |
6553 | end loop; | |
6554 | ||
6555 | if Op_1 /= Op_2 then | |
6556 | raise Program_Error; | |
6557 | end if; | |
6558 | end; | |
aad6babd | 6559 | end if; |
6560 | ||
af647dc7 | 6561 | Next_Elmt (Op_Elmt); |
aad6babd | 6562 | end loop; |
6563 | end Validate_Position; | |
6564 | ||
af647dc7 | 6565 | -- Local variables |
6566 | ||
6567 | Parent_Typ : constant Entity_Id := Etype (Typ); | |
af647dc7 | 6568 | First_Prim : constant Elmt_Id := First_Elmt (Primitive_Operations (Typ)); |
6569 | The_Tag : constant Entity_Id := First_Tag_Component (Typ); | |
6570 | ||
6571 | Adjusted : Boolean := False; | |
6572 | Finalized : Boolean := False; | |
6573 | ||
343d35dc | 6574 | Count_Prim : Nat; |
6575 | DT_Length : Nat; | |
6576 | Nb_Prim : Nat; | |
af647dc7 | 6577 | Prim : Entity_Id; |
6578 | Prim_Elmt : Elmt_Id; | |
6579 | ||
aad6babd | 6580 | -- Start of processing for Set_All_DT_Position |
6581 | ||
6582 | begin | |
a652dd51 | 6583 | pragma Assert (Present (First_Tag_Component (Typ))); |
6584 | ||
343d35dc | 6585 | -- Set the DT_Position for each primitive operation. Perform some |
36b938a3 | 6586 | -- sanity checks to avoid to build completely inconsistent dispatch |
343d35dc | 6587 | -- tables. |
ee6ba406 | 6588 | |
343d35dc | 6589 | -- First stage: Set the DTC entity of all the primitive operations |
6590 | -- This is required to properly read the DT_Position attribute in | |
6591 | -- the latter stages. | |
ee6ba406 | 6592 | |
343d35dc | 6593 | Prim_Elmt := First_Prim; |
6594 | Count_Prim := 0; | |
6595 | while Present (Prim_Elmt) loop | |
6596 | Prim := Node (Prim_Elmt); | |
ee6ba406 | 6597 | |
343d35dc | 6598 | -- Predefined primitives have a separate dispatch table |
ee6ba406 | 6599 | |
343d35dc | 6600 | if not (Is_Predefined_Dispatching_Operation (Prim) |
6601 | or else Is_Predefined_Dispatching_Alias (Prim)) | |
6602 | then | |
6603 | Count_Prim := Count_Prim + 1; | |
6604 | end if; | |
ee6ba406 | 6605 | |
725a69d2 | 6606 | Set_DTC_Entity_Value (Typ, Prim); |
ee6ba406 | 6607 | |
343d35dc | 6608 | -- Clear any previous value of the DT_Position attribute. In this |
6609 | -- way we ensure that the final position of all the primitives is | |
36b938a3 | 6610 | -- established by the following stages of this algorithm. |
ee6ba406 | 6611 | |
343d35dc | 6612 | Set_DT_Position (Prim, No_Uint); |
ee6ba406 | 6613 | |
343d35dc | 6614 | Next_Elmt (Prim_Elmt); |
6615 | end loop; | |
ee6ba406 | 6616 | |
343d35dc | 6617 | declare |
acf97c11 | 6618 | Fixed_Prim : array (Int range 0 .. Count_Prim) of Boolean := |
6619 | (others => False); | |
6620 | ||
343d35dc | 6621 | E : Entity_Id; |
ee6ba406 | 6622 | |
725a69d2 | 6623 | procedure Handle_Inherited_Private_Subprograms (Typ : Entity_Id); |
6624 | -- Called if Typ is declared in a nested package or a public child | |
6625 | -- package to handle inherited primitives that were inherited by Typ | |
6626 | -- in the visible part, but whose declaration was deferred because | |
6627 | -- the parent operation was private and not visible at that point. | |
6628 | ||
343d35dc | 6629 | procedure Set_Fixed_Prim (Pos : Nat); |
6630 | -- Sets to true an element of the Fixed_Prim table to indicate | |
6631 | -- that this entry of the dispatch table of Typ is occupied. | |
ee6ba406 | 6632 | |
725a69d2 | 6633 | ------------------------------------------ |
6634 | -- Handle_Inherited_Private_Subprograms -- | |
6635 | ------------------------------------------ | |
6636 | ||
6637 | procedure Handle_Inherited_Private_Subprograms (Typ : Entity_Id) is | |
6638 | Op_List : Elist_Id; | |
6639 | Op_Elmt : Elmt_Id; | |
6640 | Op_Elmt_2 : Elmt_Id; | |
6641 | Prim_Op : Entity_Id; | |
6642 | Parent_Subp : Entity_Id; | |
6643 | ||
6644 | begin | |
6645 | Op_List := Primitive_Operations (Typ); | |
6646 | ||
6647 | Op_Elmt := First_Elmt (Op_List); | |
6648 | while Present (Op_Elmt) loop | |
6649 | Prim_Op := Node (Op_Elmt); | |
6650 | ||
6651 | -- Search primitives that are implicit operations with an | |
6652 | -- internal name whose parent operation has a normal name. | |
6653 | ||
6654 | if Present (Alias (Prim_Op)) | |
6655 | and then Find_Dispatching_Type (Alias (Prim_Op)) /= Typ | |
6656 | and then not Comes_From_Source (Prim_Op) | |
6657 | and then Is_Internal_Name (Chars (Prim_Op)) | |
6658 | and then not Is_Internal_Name (Chars (Alias (Prim_Op))) | |
6659 | then | |
6660 | Parent_Subp := Alias (Prim_Op); | |
6661 | ||
6662 | -- Check if the type has an explicit overriding for this | |
6663 | -- primitive. | |
6664 | ||
6665 | Op_Elmt_2 := Next_Elmt (Op_Elmt); | |
6666 | while Present (Op_Elmt_2) loop | |
6667 | if Chars (Node (Op_Elmt_2)) = Chars (Parent_Subp) | |
6668 | and then Type_Conformant (Prim_Op, Node (Op_Elmt_2)) | |
6669 | then | |
6670 | Set_DT_Position (Prim_Op, DT_Position (Parent_Subp)); | |
6671 | Set_DT_Position (Node (Op_Elmt_2), | |
6672 | DT_Position (Parent_Subp)); | |
6673 | Set_Fixed_Prim (UI_To_Int (DT_Position (Prim_Op))); | |
6674 | ||
6675 | goto Next_Primitive; | |
6676 | end if; | |
6677 | ||
6678 | Next_Elmt (Op_Elmt_2); | |
6679 | end loop; | |
6680 | end if; | |
6681 | ||
6682 | <<Next_Primitive>> | |
6683 | Next_Elmt (Op_Elmt); | |
6684 | end loop; | |
6685 | end Handle_Inherited_Private_Subprograms; | |
6686 | ||
343d35dc | 6687 | -------------------- |
6688 | -- Set_Fixed_Prim -- | |
6689 | -------------------- | |
ee6ba406 | 6690 | |
343d35dc | 6691 | procedure Set_Fixed_Prim (Pos : Nat) is |
ee6ba406 | 6692 | begin |
9e7de1e1 | 6693 | pragma Assert (Pos <= Count_Prim); |
343d35dc | 6694 | Fixed_Prim (Pos) := True; |
6695 | exception | |
6696 | when Constraint_Error => | |
6697 | raise Program_Error; | |
6698 | end Set_Fixed_Prim; | |
ee6ba406 | 6699 | |
343d35dc | 6700 | begin |
725a69d2 | 6701 | -- In case of nested packages and public child package it may be |
6702 | -- necessary a special management on inherited subprograms so that | |
6703 | -- the dispatch table is properly filled. | |
6704 | ||
6705 | if Ekind (Scope (Scope (Typ))) = E_Package | |
6706 | and then Scope (Scope (Typ)) /= Standard_Standard | |
6707 | and then ((Is_Derived_Type (Typ) and then not Is_Private_Type (Typ)) | |
6708 | or else | |
6709 | (Nkind (Parent (Typ)) = N_Private_Extension_Declaration | |
6710 | and then Is_Generic_Type (Typ))) | |
6711 | and then In_Open_Scopes (Scope (Etype (Typ))) | |
6712 | and then Typ = Base_Type (Typ) | |
6713 | then | |
6714 | Handle_Inherited_Private_Subprograms (Typ); | |
6715 | end if; | |
6716 | ||
343d35dc | 6717 | -- Second stage: Register fixed entries |
ee6ba406 | 6718 | |
343d35dc | 6719 | Nb_Prim := 0; |
6720 | Prim_Elmt := First_Prim; | |
6721 | while Present (Prim_Elmt) loop | |
6722 | Prim := Node (Prim_Elmt); | |
ee6ba406 | 6723 | |
343d35dc | 6724 | -- Predefined primitives have a separate table and all its |
6725 | -- entries are at predefined fixed positions. | |
ee6ba406 | 6726 | |
343d35dc | 6727 | if Is_Predefined_Dispatching_Operation (Prim) then |
6728 | Set_DT_Position (Prim, Default_Prim_Op_Position (Prim)); | |
ee6ba406 | 6729 | |
343d35dc | 6730 | elsif Is_Predefined_Dispatching_Alias (Prim) then |
6731 | E := Alias (Prim); | |
6732 | while Present (Alias (E)) loop | |
6733 | E := Alias (E); | |
6734 | end loop; | |
d62940bf | 6735 | |
343d35dc | 6736 | Set_DT_Position (Prim, Default_Prim_Op_Position (E)); |
d62940bf | 6737 | |
343d35dc | 6738 | -- Overriding primitives of ancestor abstract interfaces |
ee6ba406 | 6739 | |
a652dd51 | 6740 | elsif Present (Interface_Alias (Prim)) |
6741 | and then Is_Ancestor | |
6742 | (Find_Dispatching_Type (Interface_Alias (Prim)), Typ) | |
343d35dc | 6743 | then |
6744 | pragma Assert (DT_Position (Prim) = No_Uint | |
a652dd51 | 6745 | and then Present (DTC_Entity (Interface_Alias (Prim)))); |
ee6ba406 | 6746 | |
a652dd51 | 6747 | E := Interface_Alias (Prim); |
343d35dc | 6748 | Set_DT_Position (Prim, DT_Position (E)); |
aad6babd | 6749 | |
343d35dc | 6750 | pragma Assert |
6751 | (DT_Position (Alias (Prim)) = No_Uint | |
6752 | or else DT_Position (Alias (Prim)) = DT_Position (E)); | |
6753 | Set_DT_Position (Alias (Prim), DT_Position (E)); | |
6754 | Set_Fixed_Prim (UI_To_Int (DT_Position (Prim))); | |
af647dc7 | 6755 | |
343d35dc | 6756 | -- Overriding primitives must use the same entry as the |
36b938a3 | 6757 | -- overridden primitive. |
af647dc7 | 6758 | |
a652dd51 | 6759 | elsif not Present (Interface_Alias (Prim)) |
343d35dc | 6760 | and then Present (Alias (Prim)) |
17e14451 | 6761 | and then Chars (Prim) = Chars (Alias (Prim)) |
343d35dc | 6762 | and then Find_Dispatching_Type (Alias (Prim)) /= Typ |
a652dd51 | 6763 | and then Is_Ancestor |
343d35dc | 6764 | (Find_Dispatching_Type (Alias (Prim)), Typ) |
6765 | and then Present (DTC_Entity (Alias (Prim))) | |
af647dc7 | 6766 | then |
343d35dc | 6767 | E := Alias (Prim); |
6768 | Set_DT_Position (Prim, DT_Position (E)); | |
aad6babd | 6769 | |
343d35dc | 6770 | if not Is_Predefined_Dispatching_Alias (E) then |
6771 | Set_Fixed_Prim (UI_To_Int (DT_Position (E))); | |
6772 | end if; | |
9dfe12ae | 6773 | end if; |
ee6ba406 | 6774 | |
aad6babd | 6775 | Next_Elmt (Prim_Elmt); |
6776 | end loop; | |
6777 | ||
343d35dc | 6778 | -- Third stage: Fix the position of all the new primitives |
6779 | -- Entries associated with primitives covering interfaces | |
6780 | -- are handled in a latter round. | |
aad6babd | 6781 | |
343d35dc | 6782 | Prim_Elmt := First_Prim; |
6783 | while Present (Prim_Elmt) loop | |
6784 | Prim := Node (Prim_Elmt); | |
aad6babd | 6785 | |
343d35dc | 6786 | -- Skip primitives previously set entries |
aad6babd | 6787 | |
343d35dc | 6788 | if DT_Position (Prim) /= No_Uint then |
6789 | null; | |
aad6babd | 6790 | |
343d35dc | 6791 | -- Primitives covering interface primitives are handled later |
aad6babd | 6792 | |
a652dd51 | 6793 | elsif Present (Interface_Alias (Prim)) then |
343d35dc | 6794 | null; |
aad6babd | 6795 | |
343d35dc | 6796 | else |
6797 | -- Take the next available position in the DT | |
aad6babd | 6798 | |
343d35dc | 6799 | loop |
6800 | Nb_Prim := Nb_Prim + 1; | |
6801 | pragma Assert (Nb_Prim <= Count_Prim); | |
6802 | exit when not Fixed_Prim (Nb_Prim); | |
6803 | end loop; | |
aad6babd | 6804 | |
343d35dc | 6805 | Set_DT_Position (Prim, UI_From_Int (Nb_Prim)); |
6806 | Set_Fixed_Prim (Nb_Prim); | |
6807 | end if; | |
aad6babd | 6808 | |
343d35dc | 6809 | Next_Elmt (Prim_Elmt); |
6810 | end loop; | |
6811 | end; | |
aad6babd | 6812 | |
343d35dc | 6813 | -- Fourth stage: Complete the decoration of primitives covering |
6814 | -- interfaces (that is, propagate the DT_Position attribute | |
6815 | -- from the aliased primitive) | |
aad6babd | 6816 | |
343d35dc | 6817 | Prim_Elmt := First_Prim; |
6818 | while Present (Prim_Elmt) loop | |
6819 | Prim := Node (Prim_Elmt); | |
aad6babd | 6820 | |
343d35dc | 6821 | if DT_Position (Prim) = No_Uint |
a652dd51 | 6822 | and then Present (Interface_Alias (Prim)) |
343d35dc | 6823 | then |
6824 | pragma Assert (Present (Alias (Prim)) | |
6825 | and then Find_Dispatching_Type (Alias (Prim)) = Typ); | |
aad6babd | 6826 | |
343d35dc | 6827 | -- Check if this entry will be placed in the primary DT |
aad6babd | 6828 | |
a652dd51 | 6829 | if Is_Ancestor |
6830 | (Find_Dispatching_Type (Interface_Alias (Prim)), Typ) | |
ee6ba406 | 6831 | then |
343d35dc | 6832 | pragma Assert (DT_Position (Alias (Prim)) /= No_Uint); |
6833 | Set_DT_Position (Prim, DT_Position (Alias (Prim))); | |
aad6babd | 6834 | |
343d35dc | 6835 | -- Otherwise it will be placed in the secondary DT |
aad6babd | 6836 | |
343d35dc | 6837 | else |
6838 | pragma Assert | |
a652dd51 | 6839 | (DT_Position (Interface_Alias (Prim)) /= No_Uint); |
343d35dc | 6840 | Set_DT_Position (Prim, |
a652dd51 | 6841 | DT_Position (Interface_Alias (Prim))); |
aad6babd | 6842 | end if; |
343d35dc | 6843 | end if; |
aad6babd | 6844 | |
343d35dc | 6845 | Next_Elmt (Prim_Elmt); |
6846 | end loop; | |
d62940bf | 6847 | |
343d35dc | 6848 | -- Generate listing showing the contents of the dispatch tables. |
6849 | -- This action is done before some further static checks because | |
6850 | -- in case of critical errors caused by a wrong dispatch table | |
6851 | -- we need to see the contents of such table. | |
d62940bf | 6852 | |
343d35dc | 6853 | if Debug_Flag_ZZ then |
6854 | Write_DT (Typ); | |
6855 | end if; | |
aad6babd | 6856 | |
343d35dc | 6857 | -- Final stage: Ensure that the table is correct plus some further |
6858 | -- verifications concerning the primitives. | |
aad6babd | 6859 | |
343d35dc | 6860 | Prim_Elmt := First_Prim; |
6861 | DT_Length := 0; | |
6862 | while Present (Prim_Elmt) loop | |
6863 | Prim := Node (Prim_Elmt); | |
aad6babd | 6864 | |
343d35dc | 6865 | -- At this point all the primitives MUST have a position |
acf97c11 | 6866 | -- in the dispatch table. |
aad6babd | 6867 | |
343d35dc | 6868 | if DT_Position (Prim) = No_Uint then |
6869 | raise Program_Error; | |
6870 | end if; | |
aad6babd | 6871 | |
343d35dc | 6872 | -- Calculate real size of the dispatch table |
aad6babd | 6873 | |
343d35dc | 6874 | if not (Is_Predefined_Dispatching_Operation (Prim) |
6875 | or else Is_Predefined_Dispatching_Alias (Prim)) | |
6876 | and then UI_To_Int (DT_Position (Prim)) > DT_Length | |
6877 | then | |
6878 | DT_Length := UI_To_Int (DT_Position (Prim)); | |
6879 | end if; | |
aad6babd | 6880 | |
36b938a3 | 6881 | -- Ensure that the assigned position to non-predefined |
343d35dc | 6882 | -- dispatching operations in the dispatch table is correct. |
aad6babd | 6883 | |
343d35dc | 6884 | if not (Is_Predefined_Dispatching_Operation (Prim) |
6885 | or else Is_Predefined_Dispatching_Alias (Prim)) | |
6886 | then | |
6887 | Validate_Position (Prim); | |
6888 | end if; | |
ee6ba406 | 6889 | |
343d35dc | 6890 | if Chars (Prim) = Name_Finalize then |
6891 | Finalized := True; | |
6892 | end if; | |
ee6ba406 | 6893 | |
343d35dc | 6894 | if Chars (Prim) = Name_Adjust then |
6895 | Adjusted := True; | |
6896 | end if; | |
af647dc7 | 6897 | |
343d35dc | 6898 | -- An abstract operation cannot be declared in the private part |
6899 | -- for a visible abstract type, because it could never be over- | |
6900 | -- ridden. For explicit declarations this is checked at the | |
6901 | -- point of declaration, but for inherited operations it must | |
6902 | -- be done when building the dispatch table. | |
6903 | ||
a652dd51 | 6904 | -- Ada 2005 (AI-251): Primitives associated with interfaces are |
6905 | -- excluded from this check because interfaces must be visible in | |
6906 | -- the public and private part (RM 7.3 (7.3/2)) | |
343d35dc | 6907 | |
6908 | if Is_Abstract_Type (Typ) | |
6909 | and then Is_Abstract_Subprogram (Prim) | |
6910 | and then Present (Alias (Prim)) | |
a652dd51 | 6911 | and then not Is_Interface |
6912 | (Find_Dispatching_Type (Ultimate_Alias (Prim))) | |
6913 | and then not Present (Interface_Alias (Prim)) | |
343d35dc | 6914 | and then Is_Derived_Type (Typ) |
6915 | and then In_Private_Part (Current_Scope) | |
6916 | and then | |
6917 | List_Containing (Parent (Prim)) = | |
6918 | Private_Declarations | |
6919 | (Specification (Unit_Declaration_Node (Current_Scope))) | |
6920 | and then Original_View_In_Visible_Part (Typ) | |
6921 | then | |
6922 | -- We exclude Input and Output stream operations because | |
6923 | -- Limited_Controlled inherits useless Input and Output | |
6924 | -- stream operations from Root_Controlled, which can | |
6925 | -- never be overridden. | |
ee6ba406 | 6926 | |
343d35dc | 6927 | if not Is_TSS (Prim, TSS_Stream_Input) |
6928 | and then | |
6929 | not Is_TSS (Prim, TSS_Stream_Output) | |
ee6ba406 | 6930 | then |
343d35dc | 6931 | Error_Msg_NE |
6932 | ("abstract inherited private operation&" & | |
17e14451 | 6933 | " must be overridden (RM 3.9.3(10))", |
343d35dc | 6934 | Parent (Typ), Prim); |
ee6ba406 | 6935 | end if; |
343d35dc | 6936 | end if; |
aad6babd | 6937 | |
343d35dc | 6938 | Next_Elmt (Prim_Elmt); |
6939 | end loop; | |
ee6ba406 | 6940 | |
343d35dc | 6941 | -- Additional check |
aad6babd | 6942 | |
343d35dc | 6943 | if Is_Controlled (Typ) then |
6944 | if not Finalized then | |
6945 | Error_Msg_N | |
6946 | ("controlled type has no explicit Finalize method?", Typ); | |
ee6ba406 | 6947 | |
343d35dc | 6948 | elsif not Adjusted then |
6949 | Error_Msg_N | |
6950 | ("controlled type has no explicit Adjust method?", Typ); | |
ee6ba406 | 6951 | end if; |
343d35dc | 6952 | end if; |
ee6ba406 | 6953 | |
343d35dc | 6954 | -- Set the final size of the Dispatch Table |
aad6babd | 6955 | |
343d35dc | 6956 | Set_DT_Entry_Count (The_Tag, UI_From_Int (DT_Length)); |
ee6ba406 | 6957 | |
725a69d2 | 6958 | -- The derived type must have at least as many components as its parent |
acf97c11 | 6959 | -- (for root types Etype points to itself and the test cannot fail). |
aad6babd | 6960 | |
725a69d2 | 6961 | if DT_Entry_Count (The_Tag) < |
6962 | DT_Entry_Count (First_Tag_Component (Parent_Typ)) | |
6963 | then | |
6964 | raise Program_Error; | |
aad6babd | 6965 | end if; |
ee6ba406 | 6966 | end Set_All_DT_Position; |
6967 | ||
294b942d | 6968 | -------------------------- |
6969 | -- Set_CPP_Constructors -- | |
6970 | -------------------------- | |
ee6ba406 | 6971 | |
294b942d | 6972 | procedure Set_CPP_Constructors (Typ : Entity_Id) is |
ee6ba406 | 6973 | Loc : Source_Ptr; |
6974 | Init : Entity_Id; | |
ee6ba406 | 6975 | E : Entity_Id; |
294b942d | 6976 | Found : Boolean := False; |
6977 | P : Node_Id; | |
6978 | Parms : List_Id; | |
ee6ba406 | 6979 | |
6980 | begin | |
294b942d | 6981 | -- Look for the constructor entities |
ee6ba406 | 6982 | |
6983 | E := Next_Entity (Typ); | |
294b942d | 6984 | while Present (E) loop |
6985 | if Ekind (E) = E_Function | |
6986 | and then Is_Constructor (E) | |
6987 | then | |
6988 | -- Create the init procedure | |
6989 | ||
6990 | Found := True; | |
6991 | Loc := Sloc (E); | |
6992 | Init := Make_Defining_Identifier (Loc, Make_Init_Proc_Name (Typ)); | |
6993 | Parms := | |
6994 | New_List ( | |
6995 | Make_Parameter_Specification (Loc, | |
6996 | Defining_Identifier => | |
6997 | Make_Defining_Identifier (Loc, Name_X), | |
6998 | Parameter_Type => | |
6999 | New_Reference_To (Typ, Loc))); | |
7000 | ||
7001 | if Present (Parameter_Specifications (Parent (E))) then | |
7002 | P := First (Parameter_Specifications (Parent (E))); | |
7003 | while Present (P) loop | |
7004 | Append_To (Parms, | |
7005 | Make_Parameter_Specification (Loc, | |
7006 | Defining_Identifier => | |
7007 | Make_Defining_Identifier (Loc, | |
7008 | Chars (Defining_Identifier (P))), | |
7009 | Parameter_Type => New_Copy_Tree (Parameter_Type (P)))); | |
7010 | Next (P); | |
7011 | end loop; | |
7012 | end if; | |
7013 | ||
7014 | Discard_Node ( | |
7015 | Make_Subprogram_Declaration (Loc, | |
7016 | Make_Procedure_Specification (Loc, | |
7017 | Defining_Unit_Name => Init, | |
7018 | Parameter_Specifications => Parms))); | |
7019 | ||
7020 | Set_Init_Proc (Typ, Init); | |
7021 | Set_Is_Imported (Init); | |
7022 | Set_Interface_Name (Init, Interface_Name (E)); | |
7023 | Set_Convention (Init, Convention_C); | |
7024 | Set_Is_Public (Init); | |
7025 | Set_Has_Completion (Init); | |
7026 | end if; | |
7027 | ||
ee6ba406 | 7028 | Next_Entity (E); |
7029 | end loop; | |
7030 | ||
9dfe12ae | 7031 | -- If there are no constructors, mark the type as abstract since we |
ee6ba406 | 7032 | -- won't be able to declare objects of that type. |
7033 | ||
294b942d | 7034 | if not Found then |
343d35dc | 7035 | Set_Is_Abstract_Type (Typ); |
ee6ba406 | 7036 | end if; |
294b942d | 7037 | end Set_CPP_Constructors; |
ee6ba406 | 7038 | |
725a69d2 | 7039 | -------------------------- |
7040 | -- Set_DTC_Entity_Value -- | |
7041 | -------------------------- | |
7042 | ||
7043 | procedure Set_DTC_Entity_Value | |
7044 | (Tagged_Type : Entity_Id; | |
7045 | Prim : Entity_Id) | |
7046 | is | |
7047 | begin | |
a652dd51 | 7048 | if Present (Interface_Alias (Prim)) |
725a69d2 | 7049 | and then Is_Interface |
a652dd51 | 7050 | (Find_Dispatching_Type (Interface_Alias (Prim))) |
725a69d2 | 7051 | then |
7052 | Set_DTC_Entity (Prim, | |
7053 | Find_Interface_Tag | |
7054 | (T => Tagged_Type, | |
a652dd51 | 7055 | Iface => Find_Dispatching_Type (Interface_Alias (Prim)))); |
725a69d2 | 7056 | else |
7057 | Set_DTC_Entity (Prim, | |
7058 | First_Tag_Component (Tagged_Type)); | |
7059 | end if; | |
7060 | end Set_DTC_Entity_Value; | |
7061 | ||
952af0b9 | 7062 | ----------------- |
7063 | -- Tagged_Kind -- | |
7064 | ----------------- | |
7065 | ||
7066 | function Tagged_Kind (T : Entity_Id) return Node_Id is | |
7067 | Conc_Typ : Entity_Id; | |
7068 | Loc : constant Source_Ptr := Sloc (T); | |
7069 | ||
7070 | begin | |
68f95949 | 7071 | pragma Assert |
7072 | (Is_Tagged_Type (T) and then RTE_Available (RE_Tagged_Kind)); | |
952af0b9 | 7073 | |
7074 | -- Abstract kinds | |
7075 | ||
343d35dc | 7076 | if Is_Abstract_Type (T) then |
952af0b9 | 7077 | if Is_Limited_Record (T) then |
7078 | return New_Reference_To (RTE (RE_TK_Abstract_Limited_Tagged), Loc); | |
7079 | else | |
7080 | return New_Reference_To (RTE (RE_TK_Abstract_Tagged), Loc); | |
7081 | end if; | |
7082 | ||
7083 | -- Concurrent kinds | |
7084 | ||
7085 | elsif Is_Concurrent_Record_Type (T) then | |
7086 | Conc_Typ := Corresponding_Concurrent_Type (T); | |
7087 | ||
17e14451 | 7088 | if Present (Full_View (Conc_Typ)) then |
7089 | Conc_Typ := Full_View (Conc_Typ); | |
7090 | end if; | |
7091 | ||
952af0b9 | 7092 | if Ekind (Conc_Typ) = E_Protected_Type then |
7093 | return New_Reference_To (RTE (RE_TK_Protected), Loc); | |
7094 | else | |
7095 | pragma Assert (Ekind (Conc_Typ) = E_Task_Type); | |
7096 | return New_Reference_To (RTE (RE_TK_Task), Loc); | |
7097 | end if; | |
7098 | ||
7099 | -- Regular tagged kinds | |
7100 | ||
7101 | else | |
7102 | if Is_Limited_Record (T) then | |
7103 | return New_Reference_To (RTE (RE_TK_Limited_Tagged), Loc); | |
7104 | else | |
7105 | return New_Reference_To (RTE (RE_TK_Tagged), Loc); | |
7106 | end if; | |
7107 | end if; | |
7108 | end Tagged_Kind; | |
7109 | ||
aad6babd | 7110 | -------------- |
7111 | -- Write_DT -- | |
7112 | -------------- | |
7113 | ||
7114 | procedure Write_DT (Typ : Entity_Id) is | |
7115 | Elmt : Elmt_Id; | |
7116 | Prim : Node_Id; | |
7117 | ||
7118 | begin | |
7119 | -- Protect this procedure against wrong usage. Required because it will | |
7120 | -- be used directly from GDB | |
7121 | ||
17e14451 | 7122 | if not (Typ <= Last_Node_Id) |
aad6babd | 7123 | or else not Is_Tagged_Type (Typ) |
7124 | then | |
d62940bf | 7125 | Write_Str ("wrong usage: Write_DT must be used with tagged types"); |
aad6babd | 7126 | Write_Eol; |
7127 | return; | |
7128 | end if; | |
7129 | ||
7130 | Write_Int (Int (Typ)); | |
7131 | Write_Str (": "); | |
7132 | Write_Name (Chars (Typ)); | |
7133 | ||
7134 | if Is_Interface (Typ) then | |
7135 | Write_Str (" is interface"); | |
7136 | end if; | |
7137 | ||
7138 | Write_Eol; | |
7139 | ||
7140 | Elmt := First_Elmt (Primitive_Operations (Typ)); | |
7141 | while Present (Elmt) loop | |
7142 | Prim := Node (Elmt); | |
7143 | Write_Str (" - "); | |
7144 | ||
7145 | -- Indicate if this primitive will be allocated in the primary | |
7146 | -- dispatch table or in a secondary dispatch table associated | |
7147 | -- with an abstract interface type | |
7148 | ||
7149 | if Present (DTC_Entity (Prim)) then | |
7150 | if Etype (DTC_Entity (Prim)) = RTE (RE_Tag) then | |
7151 | Write_Str ("[P] "); | |
7152 | else | |
7153 | Write_Str ("[s] "); | |
7154 | end if; | |
7155 | end if; | |
7156 | ||
7157 | -- Output the node of this primitive operation and its name | |
7158 | ||
7159 | Write_Int (Int (Prim)); | |
7160 | Write_Str (": "); | |
68f95949 | 7161 | |
7162 | if Is_Predefined_Dispatching_Operation (Prim) then | |
7163 | Write_Str ("(predefined) "); | |
7164 | end if; | |
7165 | ||
aad6babd | 7166 | Write_Name (Chars (Prim)); |
7167 | ||
7168 | -- Indicate if this primitive has an aliased primitive | |
7169 | ||
7170 | if Present (Alias (Prim)) then | |
7171 | Write_Str (" (alias = "); | |
7172 | Write_Int (Int (Alias (Prim))); | |
7173 | ||
7174 | -- If the DTC_Entity attribute is already set we can also output | |
7175 | -- the name of the interface covered by this primitive (if any) | |
7176 | ||
7177 | if Present (DTC_Entity (Alias (Prim))) | |
7178 | and then Is_Interface (Scope (DTC_Entity (Alias (Prim)))) | |
7179 | then | |
7180 | Write_Str (" from interface "); | |
7181 | Write_Name (Chars (Scope (DTC_Entity (Alias (Prim))))); | |
7182 | end if; | |
7183 | ||
a652dd51 | 7184 | if Present (Interface_Alias (Prim)) then |
aad6babd | 7185 | Write_Str (", AI_Alias of "); |
a652dd51 | 7186 | Write_Name |
7187 | (Chars (Find_Dispatching_Type (Interface_Alias (Prim)))); | |
aad6babd | 7188 | Write_Char (':'); |
a652dd51 | 7189 | Write_Int (Int (Interface_Alias (Prim))); |
aad6babd | 7190 | end if; |
7191 | ||
7192 | Write_Str (")"); | |
7193 | end if; | |
7194 | ||
7195 | -- Display the final position of this primitive in its associated | |
7196 | -- (primary or secondary) dispatch table | |
7197 | ||
7198 | if Present (DTC_Entity (Prim)) | |
7199 | and then DT_Position (Prim) /= No_Uint | |
7200 | then | |
7201 | Write_Str (" at #"); | |
7202 | Write_Int (UI_To_Int (DT_Position (Prim))); | |
7203 | end if; | |
7204 | ||
343d35dc | 7205 | if Is_Abstract_Subprogram (Prim) then |
aad6babd | 7206 | Write_Str (" is abstract;"); |
af647dc7 | 7207 | |
7208 | -- Check if this is a null primitive | |
7209 | ||
7210 | elsif Comes_From_Source (Prim) | |
7211 | and then Ekind (Prim) = E_Procedure | |
7212 | and then Null_Present (Parent (Prim)) | |
7213 | then | |
7214 | Write_Str (" is null;"); | |
aad6babd | 7215 | end if; |
7216 | ||
555c63a6 | 7217 | if Is_Eliminated (Ultimate_Alias (Prim)) then |
7218 | Write_Str (" (eliminated)"); | |
7219 | end if; | |
7220 | ||
aad6babd | 7221 | Write_Eol; |
7222 | ||
7223 | Next_Elmt (Elmt); | |
7224 | end loop; | |
7225 | end Write_DT; | |
7226 | ||
ee6ba406 | 7227 | end Exp_Disp; |