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d4c433f9 | 1 | /* GNU Runtime ABI version 8 |
23a5b65a | 2 | Copyright (C) 2011-2014 Free Software Foundation, Inc. |
d764a8e6 IS |
3 | Contributed by Iain Sandoe (split from objc-act.c) |
4 | ||
5 | This file is part of GCC. | |
6 | ||
7 | GCC is free software; you can redistribute it and/or modify | |
8 | it under the terms of the GNU General Public License as published by | |
9 | the Free Software Foundation; either version 3, or (at your option) | |
10 | any later version. | |
11 | ||
12 | GCC is distributed in the hope that it will be useful, | |
13 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
15 | GNU General Public License for more details. | |
16 | ||
17 | You should have received a copy of the GNU General Public License | |
18 | along with GCC; see the file COPYING3. If not see | |
19 | <http://www.gnu.org/licenses/>. */ | |
20 | ||
21 | #include "config.h" | |
22 | #include "system.h" | |
23 | #include "coretypes.h" | |
d764a8e6 | 24 | #include "tree.h" |
d8a2d370 | 25 | #include "stringpool.h" |
d764a8e6 IS |
26 | |
27 | #ifdef OBJCPLUS | |
d4a10d0a | 28 | #include "cp/cp-tree.h" |
d764a8e6 | 29 | #else |
d4a10d0a SB |
30 | #include "c/c-tree.h" |
31 | #include "c/c-lang.h" | |
d764a8e6 IS |
32 | #endif |
33 | ||
34 | #include "langhooks.h" | |
35 | #include "c-family/c-objc.h" | |
36 | #include "objc-act.h" | |
37 | ||
38 | /* When building Objective-C++, we are not linking against the C front-end | |
39 | and so need to replicate the C tree-construction functions in some way. */ | |
40 | #ifdef OBJCPLUS | |
41 | #define OBJCP_REMAP_FUNCTIONS | |
42 | #include "objcp-decl.h" | |
43 | #endif /* OBJCPLUS */ | |
44 | ||
45 | #include "toplev.h" | |
46 | #include "ggc.h" | |
47 | #include "tree-iterator.h" | |
48 | ||
49 | #include "objc-runtime-hooks.h" | |
50 | #include "objc-runtime-shared-support.h" | |
f027ee7c | 51 | #include "objc-encoding.h" |
d764a8e6 IS |
52 | |
53 | /* GNU runtime private definitions. */ | |
54 | #define DEF_CONSTANT_STRING_CLASS_NAME "NXConstantString" | |
55 | ||
56 | #define TAG_GETCLASS "objc_get_class" | |
57 | #define TAG_GETMETACLASS "objc_get_meta_class" | |
58 | ||
59 | #define TAG_MSGSEND "objc_msg_lookup" | |
60 | #define TAG_MSGSENDSUPER "objc_msg_lookup_super" | |
61 | ||
62 | /* GNU-specific tags. */ | |
63 | ||
64 | #define TAG_EXECCLASS "__objc_exec_class" | |
65 | #define TAG_GNUINIT "__objc_gnu_init" | |
66 | ||
67 | /* The version identifies which language generation and runtime | |
68 | the module (file) was compiled for, and is recorded in the | |
69 | module descriptor. */ | |
70 | #define OBJC_VERSION 8 | |
71 | ||
72 | #define PROTOCOL_VERSION 2 | |
73 | ||
74 | /* This macro provides a method of removing ambiguity between runtimes | |
75 | when LTO is in use on targets supporting multiple runtimes. | |
944fb799 | 76 | |
d764a8e6 IS |
77 | For example, at present, any target that includes an implementation of |
78 | the NeXT runtime needs to place Objective-C meta-data into specific | |
944fb799 | 79 | named sections. This should _not_ be done for the GNU runtime, and the |
587ae1e3 | 80 | following macro is used to attach Objective-C private attributes that may |
d764a8e6 IS |
81 | be used to identify the runtime for which the meta-data are intended. */ |
82 | ||
83 | #define OBJCMETA(DECL,VERS,KIND) \ | |
84 | if (VERS) \ | |
85 | DECL_ATTRIBUTES (DECL) = build_tree_list ((VERS), (KIND)); | |
86 | ||
d764a8e6 IS |
87 | static void gnu_runtime_01_initialize (void); |
88 | ||
89 | static void build_selector_template (void); | |
90 | ||
91 | static tree gnu_runtime_abi_01_super_superclassfield_id (void); | |
92 | ||
93 | static tree gnu_runtime_abi_01_class_decl (tree); | |
94 | static tree gnu_runtime_abi_01_metaclass_decl (tree); | |
95 | static tree gnu_runtime_abi_01_category_decl (tree); | |
96 | static tree gnu_runtime_abi_01_protocol_decl (tree); | |
97 | static tree gnu_runtime_abi_01_string_decl (tree, const char *, string_section); | |
98 | ||
99 | static tree gnu_runtime_abi_01_get_class_reference (tree); | |
100 | static tree gnu_runtime_abi_01_build_typed_selector_reference (location_t, tree, | |
101 | tree); | |
102 | static tree gnu_runtime_abi_01_get_protocol_reference (location_t, tree); | |
103 | static tree gnu_runtime_abi_01_build_ivar_ref (location_t, tree, tree); | |
104 | static tree gnu_runtime_abi_01_get_class_super_ref (location_t, struct imp_entry *, bool); | |
105 | static tree gnu_runtime_abi_01_get_category_super_ref (location_t, struct imp_entry *, bool); | |
106 | ||
107 | static tree gnu_runtime_abi_01_receiver_is_class_object (tree); | |
9771b263 DN |
108 | static void gnu_runtime_abi_01_get_arg_type_list_base (vec<tree, va_gc> **, |
109 | tree, int, int); | |
d764a8e6 IS |
110 | static tree gnu_runtime_abi_01_build_objc_method_call (location_t, tree, tree, |
111 | tree, tree, tree, int); | |
112 | ||
113 | static bool gnu_runtime_abi_01_setup_const_string_class_decl (void); | |
114 | static tree gnu_runtime_abi_01_build_const_string_constructor (location_t, tree,int); | |
115 | ||
116 | static void objc_generate_v1_gnu_metadata (void); | |
117 | ||
118 | static tree objc_eh_runtime_type (tree type); | |
119 | static tree objc_eh_personality (void); | |
120 | static tree objc_build_exc_ptr (struct objc_try_context **); | |
121 | static tree build_throw_stmt (location_t, tree, bool); | |
122 | static tree begin_catch (struct objc_try_context **, tree, tree, tree, bool); | |
123 | static void finish_catch (struct objc_try_context **, tree); | |
124 | static tree finish_try_stmt (struct objc_try_context **); | |
125 | ||
944fb799 | 126 | bool |
d764a8e6 IS |
127 | objc_gnu_runtime_abi_01_init (objc_runtime_hooks *rthooks) |
128 | { | |
129 | /* GNU runtime does not need the compiler to change code in order to do GC. */ | |
130 | if (flag_objc_gc) | |
131 | { | |
132 | warning_at (0, 0, "%<-fobjc-gc%> is ignored for %<-fgnu-runtime%>"); | |
133 | flag_objc_gc = 0; | |
134 | } | |
135 | ||
136 | /* Although I guess we could, we don't currently support SJLJ exceptions for the | |
137 | GNU runtime. */ | |
138 | if (flag_objc_sjlj_exceptions) | |
139 | { | |
140 | inform (UNKNOWN_LOCATION, "%<-fobjc-sjlj-exceptions%> is ignored for %<-fgnu-runtime%>"); | |
141 | flag_objc_sjlj_exceptions = 0; | |
142 | } | |
143 | ||
d4c433f9 NP |
144 | /* TODO: Complain if -fobjc-abi-version=N was used. */ |
145 | ||
146 | /* TODO: Complain if -fobj-nilcheck was used. */ | |
147 | ||
d764a8e6 IS |
148 | rthooks->initialize = gnu_runtime_01_initialize; |
149 | rthooks->default_constant_string_class_name = DEF_CONSTANT_STRING_CLASS_NAME; | |
150 | rthooks->tag_getclass = TAG_GETCLASS; | |
151 | rthooks->super_superclassfield_ident = gnu_runtime_abi_01_super_superclassfield_id; | |
152 | ||
153 | rthooks->class_decl = gnu_runtime_abi_01_class_decl; | |
154 | rthooks->metaclass_decl = gnu_runtime_abi_01_metaclass_decl; | |
155 | rthooks->category_decl = gnu_runtime_abi_01_category_decl; | |
156 | rthooks->protocol_decl = gnu_runtime_abi_01_protocol_decl; | |
157 | rthooks->string_decl = gnu_runtime_abi_01_string_decl; | |
158 | ||
159 | rthooks->get_class_reference = gnu_runtime_abi_01_get_class_reference; | |
160 | rthooks->build_selector_reference = gnu_runtime_abi_01_build_typed_selector_reference; | |
161 | rthooks->get_protocol_reference = gnu_runtime_abi_01_get_protocol_reference; | |
162 | rthooks->build_ivar_reference = gnu_runtime_abi_01_build_ivar_ref; | |
163 | rthooks->get_class_super_ref = gnu_runtime_abi_01_get_class_super_ref; | |
164 | rthooks->get_category_super_ref = gnu_runtime_abi_01_get_category_super_ref; | |
165 | ||
166 | rthooks->receiver_is_class_object = gnu_runtime_abi_01_receiver_is_class_object; | |
167 | rthooks->get_arg_type_list_base = gnu_runtime_abi_01_get_arg_type_list_base; | |
168 | rthooks->build_objc_method_call = gnu_runtime_abi_01_build_objc_method_call; | |
169 | ||
170 | rthooks->setup_const_string_class_decl = | |
171 | gnu_runtime_abi_01_setup_const_string_class_decl; | |
172 | rthooks->build_const_string_constructor = | |
173 | gnu_runtime_abi_01_build_const_string_constructor; | |
174 | ||
175 | rthooks->build_throw_stmt = build_throw_stmt; | |
176 | rthooks->build_exc_ptr = objc_build_exc_ptr; | |
177 | rthooks->begin_catch = begin_catch; | |
178 | rthooks->finish_catch = finish_catch; | |
179 | rthooks->finish_try_stmt = finish_try_stmt; | |
180 | ||
181 | rthooks->generate_metadata = objc_generate_v1_gnu_metadata; | |
182 | return true; | |
183 | } | |
184 | ||
185 | static void build_selector_table_decl (void); | |
186 | static void build_class_template (void); | |
187 | static void build_category_template (void); | |
188 | static void build_protocol_template (void); | |
189 | ||
190 | static GTY(()) tree objc_meta; | |
191 | static GTY(()) tree meta_base; | |
192 | ||
193 | static void gnu_runtime_01_initialize (void) | |
194 | { | |
195 | tree type, ftype, IMP_type; | |
196 | ||
197 | /* We do not need to mark GNU ObjC metadata for different sections, | |
198 | however, we do need to make sure that it is not mistaken for NeXT | |
199 | metadata. */ | |
200 | objc_meta = get_identifier ("OBJC1METG"); | |
201 | meta_base = get_identifier ("NONE"); | |
202 | ||
203 | /* Declare type of selector-objects that represent an operation name. */ | |
204 | /* `const struct objc_selector *' */ | |
205 | type = xref_tag (RECORD_TYPE, get_identifier (TAG_SELECTOR)); | |
206 | type = build_qualified_type (type, TYPE_QUAL_CONST); | |
207 | objc_selector_type = build_pointer_type (type); | |
208 | ||
209 | /* typedef id (*IMP)(id, SEL, ...); */ | |
210 | ftype = build_varargs_function_type_list (objc_object_type, | |
211 | objc_object_type, | |
212 | objc_selector_type, | |
213 | NULL_TREE); | |
214 | ||
215 | IMP_type = build_pointer_type (ftype); | |
216 | ||
217 | build_class_template (); | |
218 | build_super_template (); | |
219 | build_protocol_template (); | |
220 | build_category_template (); | |
221 | ||
222 | /* GNU runtime messenger entry points. */ | |
223 | /* TREE_NOTHROW is cleared for the message-sending functions, | |
224 | because the function that gets called can throw in Obj-C++, or | |
225 | could itself call something that can throw even in Obj-C. */ | |
226 | ||
227 | /* IMP objc_msg_lookup (id, SEL); */ | |
228 | type = build_function_type_list (IMP_type, | |
229 | objc_object_type, | |
230 | objc_selector_type, | |
231 | NULL_TREE); | |
232 | ||
233 | umsg_decl = add_builtin_function (TAG_MSGSEND, | |
234 | type, 0, NOT_BUILT_IN, | |
235 | NULL, NULL_TREE); | |
236 | TREE_NOTHROW (umsg_decl) = 0; | |
237 | ||
238 | /* IMP objc_msg_lookup_super (struct objc_super *, SEL); */ | |
239 | type = build_function_type_list (IMP_type, | |
240 | objc_super_type, | |
241 | objc_selector_type, | |
242 | NULL_TREE); | |
243 | ||
244 | umsg_super_decl = add_builtin_function (TAG_MSGSENDSUPER, | |
245 | type, 0, NOT_BUILT_IN, | |
246 | NULL, NULL_TREE); | |
247 | TREE_NOTHROW (umsg_super_decl) = 0; | |
248 | ||
249 | /* The following GNU runtime entry point is called to initialize | |
250 | each module: | |
251 | ||
252 | __objc_exec_class (void *); */ | |
253 | type = build_function_type_list (void_type_node, | |
254 | ptr_type_node, | |
255 | NULL_TREE); | |
256 | ||
257 | execclass_decl = add_builtin_function (TAG_EXECCLASS, | |
258 | type, 0, NOT_BUILT_IN, | |
259 | NULL, NULL_TREE); | |
260 | ||
261 | type = build_function_type_list (objc_object_type, | |
262 | const_string_type_node, | |
263 | NULL_TREE); | |
264 | ||
265 | /* id objc_getClass (const char *); */ | |
266 | objc_get_class_decl | |
267 | = add_builtin_function (TAG_GETCLASS, type, 0, NOT_BUILT_IN, | |
268 | NULL, NULL_TREE); | |
269 | ||
270 | /* id objc_getMetaClass (const char *); */ | |
944fb799 | 271 | objc_get_meta_class_decl = add_builtin_function (TAG_GETMETACLASS, type, |
d764a8e6 IS |
272 | 0, NOT_BUILT_IN, NULL, |
273 | NULL_TREE); | |
274 | ||
275 | /* static SEL _OBJC_SELECTOR_TABLE[]; */ | |
276 | build_selector_table_decl (); | |
944fb799 MS |
277 | |
278 | /* Stuff for properties. | |
d764a8e6 IS |
279 | The codegen relies on this being NULL for GNU. */ |
280 | objc_copyStruct_decl = NULL_TREE; | |
281 | ||
282 | /* This is the type of all of the following functions | |
283 | bjc_getPropertyStruct() and objc_setPropertyStruct(). */ | |
284 | type = build_function_type_list (void_type_node, | |
285 | ptr_type_node, | |
286 | const_ptr_type_node, | |
944fb799 | 287 | ptrdiff_type_node, |
d764a8e6 IS |
288 | boolean_type_node, |
289 | boolean_type_node, | |
290 | NULL_TREE); | |
291 | ||
292 | /* Declare the following function: | |
293 | void | |
944fb799 | 294 | objc_getPropertyStruct (void *destination, const void *source, |
d764a8e6 IS |
295 | ptrdiff_t size, BOOL is_atomic, BOOL has_strong); */ |
296 | objc_getPropertyStruct_decl = add_builtin_function ("objc_getPropertyStruct", | |
297 | type, 0, NOT_BUILT_IN, | |
298 | NULL, NULL_TREE); | |
299 | TREE_NOTHROW (objc_getPropertyStruct_decl) = 0; | |
300 | /* Declare the following function: | |
301 | void | |
944fb799 | 302 | objc_setPropertyStruct (void *destination, const void *source, |
d764a8e6 IS |
303 | ptrdiff_t size, BOOL is_atomic, BOOL has_strong); */ |
304 | objc_setPropertyStruct_decl = add_builtin_function ("objc_setPropertyStruct", | |
305 | type, 0, NOT_BUILT_IN, | |
306 | NULL, NULL_TREE); | |
307 | TREE_NOTHROW (objc_setPropertyStruct_decl) = 0; | |
944fb799 | 308 | |
d764a8e6 IS |
309 | using_eh_for_cleanups (); |
310 | lang_hooks.eh_runtime_type = objc_eh_runtime_type; | |
311 | lang_hooks.eh_personality = objc_eh_personality; | |
312 | } | |
313 | ||
314 | /* --- templates --- */ | |
315 | /* struct _objc_selector { | |
316 | SEL sel_id; | |
317 | char *sel_type; | |
318 | }; */ | |
319 | ||
320 | static void | |
321 | build_selector_template (void) | |
322 | { | |
323 | tree decls, *chain = NULL; | |
324 | ||
325 | objc_selector_template = objc_start_struct (get_identifier (UTAG_SELECTOR)); | |
326 | ||
327 | /* SEL sel_id; */ | |
328 | decls = add_field_decl (objc_selector_type, "sel_id", &chain); | |
329 | ||
330 | /* char *sel_type; */ | |
331 | add_field_decl (string_type_node, "sel_type", &chain); | |
332 | ||
333 | objc_finish_struct (objc_selector_template, decls); | |
334 | } | |
335 | ||
336 | /* struct _objc_class { | |
337 | struct _objc_class *isa; | |
338 | struct _objc_class *super_class; | |
339 | char *name; | |
340 | long version; | |
341 | long info; | |
342 | long instance_size; | |
343 | struct _objc_ivar_list *ivars; | |
344 | struct _objc_method_list *methods; | |
345 | struct sarray *dtable; | |
346 | struct _objc_class *subclass_list; | |
347 | struct _objc_class *sibling_class; | |
348 | struct _objc_protocol_list *protocols; | |
349 | void *gc_object_type; | |
350 | }; */ | |
351 | ||
352 | static void | |
353 | build_class_template (void) | |
354 | { | |
355 | tree ptype, decls, *chain = NULL; | |
356 | ||
357 | objc_class_template = objc_start_struct (get_identifier (UTAG_CLASS)); | |
358 | ||
359 | /* struct _objc_class *isa; */ | |
360 | decls = add_field_decl (build_pointer_type (objc_class_template), | |
361 | "isa", &chain); | |
362 | ||
363 | /* struct _objc_class *super_class; */ | |
364 | add_field_decl (build_pointer_type (objc_class_template), | |
365 | "super_class", &chain); | |
366 | ||
367 | /* char *name; */ | |
368 | add_field_decl (string_type_node, "name", &chain); | |
369 | ||
370 | /* long version; */ | |
371 | add_field_decl (long_integer_type_node, "version", &chain); | |
372 | ||
373 | /* long info; */ | |
374 | add_field_decl (long_integer_type_node, "info", &chain); | |
375 | ||
376 | /* long instance_size; */ | |
377 | add_field_decl (long_integer_type_node, "instance_size", &chain); | |
378 | ||
379 | /* struct _objc_ivar_list *ivars; */ | |
380 | add_field_decl (objc_ivar_list_ptr,"ivars", &chain); | |
381 | ||
382 | /* struct _objc_method_list *methods; */ | |
383 | add_field_decl (objc_method_list_ptr, "methods", &chain); | |
384 | ||
385 | /* struct sarray *dtable; */ | |
386 | ptype = build_pointer_type(xref_tag (RECORD_TYPE, | |
387 | get_identifier ("sarray"))); | |
388 | add_field_decl (ptype, "dtable", &chain); | |
389 | ||
390 | /* struct objc_class *subclass_list; */ | |
391 | ptype = build_pointer_type (objc_class_template); | |
392 | add_field_decl (ptype, "subclass_list", &chain); | |
393 | ||
394 | /* struct objc_class *sibling_class; */ | |
395 | ptype = build_pointer_type (objc_class_template); | |
396 | add_field_decl (ptype, "sibling_class", &chain); | |
944fb799 | 397 | |
d764a8e6 IS |
398 | /* struct _objc_protocol **protocol_list; */ |
399 | ptype = build_pointer_type (build_pointer_type | |
400 | (xref_tag (RECORD_TYPE, | |
401 | get_identifier (UTAG_PROTOCOL)))); | |
402 | add_field_decl (ptype, "protocol_list", &chain); | |
403 | ||
404 | /* void *gc_object_type; */ | |
405 | add_field_decl (build_pointer_type (void_type_node), | |
406 | "gc_object_type", &chain); | |
407 | ||
408 | objc_finish_struct (objc_class_template, decls); | |
409 | } | |
410 | ||
411 | /* struct _objc_category { | |
412 | char *category_name; | |
413 | char *class_name; | |
414 | struct _objc_method_list *instance_methods; | |
415 | struct _objc_method_list *class_methods; | |
416 | struct _objc_protocol_list *protocols; | |
417 | }; */ | |
418 | ||
419 | static void | |
420 | build_category_template (void) | |
421 | { | |
422 | tree ptype, decls, *chain = NULL; | |
423 | ||
424 | objc_category_template = objc_start_struct (get_identifier (UTAG_CATEGORY)); | |
425 | ||
426 | /* char *category_name; */ | |
427 | decls = add_field_decl (string_type_node, "category_name", &chain); | |
428 | ||
429 | /* char *class_name; */ | |
430 | add_field_decl (string_type_node, "class_name", &chain); | |
431 | ||
432 | /* struct _objc_method_list *instance_methods; */ | |
433 | add_field_decl (objc_method_list_ptr, "instance_methods", &chain); | |
434 | ||
435 | /* struct _objc_method_list *class_methods; */ | |
436 | add_field_decl (objc_method_list_ptr, "class_methods", &chain); | |
437 | ||
438 | /* struct _objc_protocol **protocol_list; */ | |
439 | ptype = build_pointer_type (build_pointer_type (objc_protocol_template)); | |
440 | add_field_decl (ptype, "protocol_list", &chain); | |
441 | ||
442 | objc_finish_struct (objc_category_template, decls); | |
443 | } | |
444 | ||
445 | /* struct _objc_protocol { | |
446 | struct _objc_class *isa; | |
447 | char *protocol_name; | |
448 | struct _objc_protocol **protocol_list; | |
449 | struct _objc__method_prototype_list *instance_methods; | |
450 | struct _objc__method_prototype_list *class_methods; | |
451 | }; */ | |
452 | ||
453 | static void | |
454 | build_protocol_template (void) | |
455 | { | |
456 | tree ptype, decls, *chain = NULL; | |
457 | ||
458 | objc_protocol_template = objc_start_struct (get_identifier (UTAG_PROTOCOL)); | |
459 | ||
460 | /* struct _objc_class *isa; */ | |
461 | ptype = build_pointer_type (xref_tag (RECORD_TYPE, | |
462 | get_identifier (UTAG_CLASS))); | |
463 | decls = add_field_decl (ptype, "isa", &chain); | |
464 | ||
465 | /* char *protocol_name; */ | |
466 | add_field_decl (string_type_node, "protocol_name", &chain); | |
467 | ||
468 | /* struct _objc_protocol **protocol_list; */ | |
469 | ptype = build_pointer_type (build_pointer_type (objc_protocol_template)); | |
470 | add_field_decl (ptype, "protocol_list", &chain); | |
471 | ||
472 | /* struct _objc__method_prototype_list *instance_methods; */ | |
473 | add_field_decl (objc_method_proto_list_ptr, "instance_methods", &chain); | |
474 | ||
475 | /* struct _objc__method_prototype_list *class_methods; */ | |
476 | add_field_decl (objc_method_proto_list_ptr, "class_methods", &chain); | |
477 | ||
478 | objc_finish_struct (objc_protocol_template, decls); | |
479 | } | |
480 | ||
587ae1e3 | 481 | /* --- names, decls + identifiers --- */ |
d764a8e6 IS |
482 | |
483 | static void | |
484 | build_selector_table_decl (void) | |
485 | { | |
486 | tree temp; | |
487 | ||
488 | build_selector_template (); | |
489 | temp = build_array_type (objc_selector_template, NULL_TREE); | |
490 | ||
491 | UOBJC_SELECTOR_TABLE_decl = start_var_decl (temp, "_OBJC_SELECTOR_TABLE"); | |
492 | OBJCMETA (UOBJC_SELECTOR_TABLE_decl, objc_meta, meta_base); | |
493 | } | |
494 | ||
495 | ||
496 | static tree | |
497 | gnu_runtime_abi_01_super_superclassfield_id (void) | |
498 | { | |
499 | if (!super_superclassfield_id) | |
500 | super_superclassfield_id = get_identifier ("super_class"); | |
501 | return super_superclassfield_id; | |
502 | } | |
503 | ||
504 | ||
505 | static tree | |
506 | gnu_runtime_abi_01_class_decl (tree klass) | |
507 | { | |
508 | tree decl; | |
509 | char buf[BUFSIZE]; | |
944fb799 | 510 | snprintf (buf, BUFSIZE, "_OBJC_Class_%s", |
d764a8e6 IS |
511 | IDENTIFIER_POINTER (CLASS_NAME (klass))); |
512 | decl = start_var_decl (objc_class_template, buf); | |
513 | OBJCMETA (decl, objc_meta, meta_base); | |
514 | return decl; | |
515 | } | |
516 | ||
517 | static tree | |
518 | gnu_runtime_abi_01_metaclass_decl (tree klass) | |
519 | { | |
520 | tree decl; | |
521 | char buf[BUFSIZE]; | |
944fb799 | 522 | snprintf (buf, BUFSIZE, "_OBJC_MetaClass_%s", |
d764a8e6 IS |
523 | IDENTIFIER_POINTER (CLASS_NAME (klass))); |
524 | decl = start_var_decl (objc_class_template, buf); | |
525 | OBJCMETA (decl, objc_meta, meta_base); | |
526 | return decl; | |
527 | } | |
528 | ||
529 | static tree | |
530 | gnu_runtime_abi_01_category_decl (tree klass) | |
531 | { | |
532 | tree decl; | |
533 | char buf[BUFSIZE]; | |
944fb799 | 534 | snprintf (buf, BUFSIZE, "_OBJC_Category_%s_on_%s", |
d764a8e6 IS |
535 | IDENTIFIER_POINTER (CLASS_SUPER_NAME (klass)), |
536 | IDENTIFIER_POINTER (CLASS_NAME (klass))); | |
537 | decl = start_var_decl (objc_category_template, buf); | |
538 | OBJCMETA (decl, objc_meta, meta_base); | |
539 | return decl; | |
540 | } | |
541 | ||
542 | static tree | |
543 | gnu_runtime_abi_01_protocol_decl (tree p) | |
544 | { | |
545 | tree decl; | |
546 | char buf[BUFSIZE]; | |
547 | ||
548 | /* static struct _objc_protocol _OBJC_Protocol_<mumble>; */ | |
549 | snprintf (buf, BUFSIZE, "_OBJC_Protocol_%s", | |
550 | IDENTIFIER_POINTER (PROTOCOL_NAME (p))); | |
551 | decl = start_var_decl (objc_protocol_template, buf); | |
552 | OBJCMETA (decl, objc_meta, meta_base); | |
553 | return decl; | |
554 | } | |
555 | ||
556 | static tree | |
944fb799 | 557 | gnu_runtime_abi_01_string_decl (tree type, const char *name, |
d764a8e6 IS |
558 | string_section where ATTRIBUTE_UNUSED) |
559 | { | |
560 | tree decl = start_var_decl (type, name); | |
561 | OBJCMETA (decl, objc_meta, meta_base); | |
562 | return decl; | |
563 | } | |
564 | ||
565 | /* --- entry --- */ | |
566 | ||
567 | static tree | |
568 | gnu_runtime_abi_01_get_class_reference (tree ident) | |
569 | { | |
570 | tree params; | |
571 | ||
572 | add_class_reference (ident); | |
573 | ||
944fb799 | 574 | params = build_tree_list (NULL_TREE, my_build_string_pointer |
d764a8e6 IS |
575 | (IDENTIFIER_LENGTH (ident) + 1, |
576 | IDENTIFIER_POINTER (ident))); | |
577 | ||
d764a8e6 IS |
578 | return build_function_call (input_location, objc_get_class_decl, params); |
579 | } | |
580 | ||
6174da1b NF |
581 | /* Used by build_function_type_for_method. Append the types for |
582 | receiver & _cmd at the start of a method argument list to ARGTYPES. | |
583 | CONTEXT is either METHOD_DEF or METHOD_REF, saying whether we are | |
584 | trying to define a method or call one. SUPERFLAG says this is for a | |
585 | send to super. METH may be NULL, in the case that there is no | |
586 | prototype. */ | |
d764a8e6 | 587 | |
6174da1b | 588 | static void |
9771b263 DN |
589 | gnu_runtime_abi_01_get_arg_type_list_base (vec<tree, va_gc> **argtypes, |
590 | tree meth, int context, | |
d764a8e6 IS |
591 | int superflag ATTRIBUTE_UNUSED) |
592 | { | |
6174da1b | 593 | tree receiver_type; |
d764a8e6 | 594 | |
d764a8e6 | 595 | if (context == METHOD_DEF && TREE_CODE (meth) == INSTANCE_METHOD_DECL) |
6174da1b | 596 | receiver_type = objc_instance_type; |
d764a8e6 | 597 | else |
6174da1b | 598 | receiver_type = objc_object_type; |
d764a8e6 | 599 | |
9771b263 | 600 | vec_safe_push (*argtypes, receiver_type); |
d764a8e6 | 601 | /* Selector type - will eventually change to `int'. */ |
9771b263 | 602 | vec_safe_push (*argtypes, objc_selector_type); |
d764a8e6 IS |
603 | } |
604 | ||
605 | /* Unused for GNU runtime. */ | |
606 | static tree | |
607 | gnu_runtime_abi_01_receiver_is_class_object (tree a ATTRIBUTE_UNUSED) | |
608 | { | |
609 | return NULL_TREE; | |
610 | } | |
611 | ||
612 | /* sel_ref_chain is a list whose "value" fields will be instances of | |
613 | identifier_node that represent the selector. LOC is the location of | |
614 | the @selector. */ | |
615 | ||
616 | static tree | |
617 | gnu_runtime_abi_01_build_typed_selector_reference (location_t loc, tree ident, | |
618 | tree prototype) | |
619 | { | |
620 | tree *chain = &sel_ref_chain; | |
621 | tree expr; | |
622 | int index = 0; | |
623 | ||
624 | while (*chain) | |
625 | { | |
944fb799 | 626 | /* When we do a lookup for @selector () we have no idea of the |
d764a8e6 | 627 | prototype - so match the first we find. */ |
944fb799 | 628 | if (TREE_VALUE (*chain) == ident |
d764a8e6 IS |
629 | && (!prototype || TREE_PURPOSE (*chain) == prototype)) |
630 | goto return_at_index; | |
631 | ||
632 | index++; | |
633 | chain = &TREE_CHAIN (*chain); | |
634 | } | |
635 | ||
636 | *chain = tree_cons (prototype, ident, NULL_TREE); | |
637 | ||
944fb799 | 638 | /* TODO: Use a vec and keep this in it to (a) avoid re-creating and |
d764a8e6 IS |
639 | (b) provide better diagnostics for the first time an undefined |
640 | selector is used. */ | |
641 | return_at_index: | |
642 | expr = build_unary_op (loc, ADDR_EXPR, | |
643 | build_array_ref (loc, UOBJC_SELECTOR_TABLE_decl, | |
644 | build_int_cst (NULL_TREE, index)), | |
645 | 1); | |
646 | return convert (objc_selector_type, expr); | |
647 | } | |
648 | ||
649 | /* Build a tree expression to send OBJECT the operation SELECTOR, | |
650 | looking up the method on object LOOKUP_OBJECT (often same as OBJECT), | |
651 | assuming the method has prototype METHOD_PROTOTYPE. | |
652 | (That is an INSTANCE_METHOD_DECL or CLASS_METHOD_DECL.) | |
653 | LOC is the location of the expression to build. | |
654 | Use METHOD_PARAMS as list of args to pass to the method. | |
655 | If SUPER_FLAG is nonzero, we look up the superclass's method. */ | |
656 | ||
657 | static tree | |
658 | build_objc_method_call (location_t loc, int super_flag, tree method_prototype, | |
659 | tree lookup_object, tree selector, | |
660 | tree method_params) | |
661 | { | |
944fb799 | 662 | tree sender = (super_flag ? umsg_super_decl |
d764a8e6 IS |
663 | : (flag_objc_direct_dispatch ? umsg_fast_decl |
664 | : umsg_decl)); | |
665 | tree rcv_p = (super_flag ? objc_super_type : objc_object_type); | |
9771b263 DN |
666 | vec<tree, va_gc> *parms; |
667 | vec<tree, va_gc> *tv; | |
d764a8e6 IS |
668 | unsigned nparm = (method_params ? list_length (method_params) : 0); |
669 | ||
670 | /* If a prototype for the method to be called exists, then cast | |
671 | the sender's return type and arguments to match that of the method. | |
672 | Otherwise, leave sender as is. */ | |
673 | tree ret_type | |
674 | = (method_prototype | |
675 | ? TREE_VALUE (TREE_TYPE (method_prototype)) | |
676 | : objc_object_type); | |
6174da1b NF |
677 | tree ftype |
678 | = build_function_type_for_method (ret_type, method_prototype, | |
679 | METHOD_REF, super_flag); | |
d764a8e6 IS |
680 | tree sender_cast; |
681 | tree method, t; | |
682 | ||
683 | if (method_prototype && METHOD_TYPE_ATTRIBUTES (method_prototype)) | |
944fb799 MS |
684 | ftype = build_type_attribute_variant (ftype, |
685 | METHOD_TYPE_ATTRIBUTES | |
d764a8e6 IS |
686 | (method_prototype)); |
687 | ||
688 | sender_cast = build_pointer_type (ftype); | |
689 | ||
690 | lookup_object = build_c_cast (loc, rcv_p, lookup_object); | |
691 | ||
692 | /* Use SAVE_EXPR to avoid evaluating the receiver twice. */ | |
693 | lookup_object = save_expr (lookup_object); | |
694 | ||
695 | /* Param list + 2 slots for object and selector. */ | |
9771b263 DN |
696 | vec_alloc (parms, nparm + 2); |
697 | vec_alloc (tv, 2); | |
d764a8e6 IS |
698 | |
699 | /* First, call the lookup function to get a pointer to the method, | |
700 | then cast the pointer, then call it with the method arguments. */ | |
9771b263 DN |
701 | tv->quick_push (lookup_object); |
702 | tv->quick_push (selector); | |
d764a8e6 | 703 | method = build_function_call_vec (loc, sender, tv, NULL); |
9771b263 | 704 | vec_free (tv); |
d764a8e6 IS |
705 | |
706 | /* Pass the appropriate object to the method. */ | |
9771b263 | 707 | parms->quick_push ((super_flag ? self_decl : lookup_object)); |
d764a8e6 IS |
708 | |
709 | /* Pass the selector to the method. */ | |
9771b263 | 710 | parms->quick_push (selector); |
d764a8e6 IS |
711 | /* Now append the remainder of the parms. */ |
712 | if (nparm) | |
713 | for (; method_params; method_params = TREE_CHAIN (method_params)) | |
9771b263 | 714 | parms->quick_push (TREE_VALUE (method_params)); |
d764a8e6 IS |
715 | |
716 | /* Build an obj_type_ref, with the correct cast for the method call. */ | |
717 | t = build3 (OBJ_TYPE_REF, sender_cast, method, lookup_object, size_zero_node); | |
718 | t = build_function_call_vec (loc, t, parms, NULL); | |
9771b263 | 719 | vec_free (parms); |
d764a8e6 IS |
720 | return t; |
721 | } | |
722 | ||
723 | static tree | |
724 | gnu_runtime_abi_01_build_objc_method_call (location_t loc, | |
725 | tree method_prototype, | |
726 | tree receiver, | |
727 | tree rtype ATTRIBUTE_UNUSED, | |
728 | tree sel_name, | |
729 | tree method_params, | |
730 | int super ATTRIBUTE_UNUSED) | |
731 | { | |
944fb799 MS |
732 | tree selector = |
733 | gnu_runtime_abi_01_build_typed_selector_reference (loc, | |
734 | sel_name, | |
d764a8e6 IS |
735 | method_prototype); |
736 | ||
737 | return build_objc_method_call (loc, super, method_prototype, receiver, | |
738 | selector, method_params); | |
739 | } | |
740 | ||
741 | static tree | |
742 | gnu_runtime_abi_01_get_protocol_reference (location_t loc, tree p) | |
743 | { | |
744 | tree expr, protocol_struct_type, *chain; | |
745 | if (!PROTOCOL_FORWARD_DECL (p)) | |
746 | PROTOCOL_FORWARD_DECL (p) = gnu_runtime_abi_01_protocol_decl (p); | |
747 | ||
748 | expr = build_unary_op (loc, ADDR_EXPR, PROTOCOL_FORWARD_DECL (p), 0); | |
749 | ||
750 | /* ??? Ideally we'd build the reference with objc_protocol_type directly, | |
751 | if we have it, rather than converting it here. */ | |
752 | expr = convert (objc_protocol_type, expr); | |
753 | ||
754 | /* The @protocol() expression is being compiled into a pointer to a | |
755 | statically allocated instance of the Protocol class. To become | |
756 | usable at runtime, the 'isa' pointer of the instance need to be | |
757 | fixed up at runtime by the runtime library, to point to the | |
758 | actual 'Protocol' class. */ | |
759 | ||
760 | /* For the GNU runtime, put the static Protocol instance in the list | |
761 | of statically allocated instances, so that we make sure that its | |
762 | 'isa' pointer is fixed up at runtime by the GNU runtime library | |
763 | to point to the Protocol class (at runtime, when loading the | |
764 | module, the GNU runtime library loops on the statically allocated | |
765 | instances (as found in the defs field in objc_symtab) and fixups | |
766 | all the 'isa' pointers of those objects). */ | |
767 | ||
768 | /* This type is a struct containing the fields of a Protocol | |
769 | object. (Cfr. objc_protocol_type instead is the type of a pointer | |
770 | to such a struct). */ | |
944fb799 | 771 | protocol_struct_type = xref_tag (RECORD_TYPE, |
d764a8e6 IS |
772 | get_identifier (PROTOCOL_OBJECT_CLASS_NAME)); |
773 | ||
774 | /* Look for the list of Protocol statically allocated instances | |
775 | to fixup at runtime. Create a new list to hold Protocol | |
776 | statically allocated instances, if the list is not found. At | |
777 | present there is only another list, holding NSConstantString | |
778 | static instances to be fixed up at runtime. */ | |
779 | ||
780 | for (chain = &objc_static_instances; | |
781 | *chain && TREE_VALUE (*chain) != protocol_struct_type; | |
782 | chain = &TREE_CHAIN (*chain)); | |
783 | ||
784 | if (!*chain) | |
785 | { | |
786 | *chain = tree_cons (NULL_TREE, protocol_struct_type, NULL_TREE); | |
787 | add_objc_string (OBJC_TYPE_NAME (protocol_struct_type), | |
788 | class_names); | |
789 | } | |
790 | ||
791 | /* Add this statically allocated instance to the Protocol list. */ | |
792 | TREE_PURPOSE (*chain) = tree_cons (NULL_TREE, | |
793 | PROTOCOL_FORWARD_DECL (p), | |
794 | TREE_PURPOSE (*chain)); | |
795 | return expr; | |
796 | } | |
797 | ||
d4c433f9 | 798 | /* For ABI 8 an IVAR is just a fixed offset in the class struct. */ |
d764a8e6 IS |
799 | |
800 | static tree | |
944fb799 | 801 | gnu_runtime_abi_01_build_ivar_ref (location_t loc ATTRIBUTE_UNUSED, |
d764a8e6 IS |
802 | tree base, tree id) |
803 | { | |
804 | return objc_build_component_ref (base, id); | |
805 | } | |
806 | ||
807 | /* We build super class references as we need them (but keep them once | |
808 | built for the sake of efficiency). */ | |
809 | ||
810 | static tree | |
944fb799 | 811 | gnu_runtime_abi_01_get_class_super_ref (location_t loc ATTRIBUTE_UNUSED, |
d764a8e6 IS |
812 | struct imp_entry *imp, bool inst_meth) |
813 | { | |
814 | if (inst_meth) | |
815 | { | |
816 | if (!ucls_super_ref) | |
944fb799 MS |
817 | ucls_super_ref = |
818 | objc_build_component_ref (imp->class_decl, | |
d764a8e6 IS |
819 | get_identifier ("super_class")); |
820 | return ucls_super_ref; | |
821 | } | |
822 | else | |
823 | { | |
824 | if (!uucls_super_ref) | |
944fb799 MS |
825 | uucls_super_ref = |
826 | objc_build_component_ref (imp->meta_decl, | |
d764a8e6 IS |
827 | get_identifier ("super_class")); |
828 | return uucls_super_ref; | |
829 | } | |
830 | } | |
831 | ||
832 | static tree | |
944fb799 | 833 | gnu_runtime_abi_01_get_category_super_ref (location_t loc ATTRIBUTE_UNUSED, |
d764a8e6 IS |
834 | struct imp_entry *imp, bool inst_meth) |
835 | { | |
836 | tree super_name = CLASS_SUPER_NAME (imp->imp_template); | |
837 | tree super_class; | |
838 | ||
839 | add_class_reference (super_name); | |
840 | super_class = (inst_meth ? objc_get_class_decl : objc_get_meta_class_decl); | |
d764a8e6 IS |
841 | super_name = my_build_string_pointer (IDENTIFIER_LENGTH (super_name) + 1, |
842 | IDENTIFIER_POINTER (super_name)); | |
843 | /* super_class = get_{meta_}class("CLASS_SUPER_NAME"); */ | |
844 | return build_function_call (input_location, | |
845 | super_class, | |
846 | build_tree_list (NULL_TREE, super_name)); | |
847 | } | |
848 | ||
849 | static bool | |
850 | gnu_runtime_abi_01_setup_const_string_class_decl (void) | |
851 | { | |
852 | /* Do nothing, and create no error. */ | |
853 | return true; | |
854 | } | |
855 | ||
856 | /* Declare a static instance of CLASS_DECL initialized by CONSTRUCTOR. */ | |
857 | ||
858 | static GTY(()) int num_static_inst; | |
859 | ||
860 | static tree | |
861 | objc_add_static_instance (tree constructor, tree class_decl) | |
862 | { | |
863 | tree *chain, decl; | |
864 | char buf[BUFSIZE]; | |
865 | ||
866 | /* Find the list of static instances for the CLASS_DECL. Create one if | |
867 | not found. */ | |
868 | for (chain = &objc_static_instances; | |
869 | *chain && TREE_VALUE (*chain) != class_decl; | |
870 | chain = &TREE_CHAIN (*chain)); | |
871 | if (!*chain) | |
872 | { | |
873 | *chain = tree_cons (NULL_TREE, class_decl, NULL_TREE); | |
874 | add_objc_string (OBJC_TYPE_NAME (class_decl), class_names); | |
875 | } | |
876 | ||
877 | snprintf (buf, BUFSIZE, "_OBJC_INSTANCE_%d", num_static_inst++); | |
878 | decl = build_decl (input_location, | |
879 | VAR_DECL, get_identifier (buf), class_decl); | |
880 | TREE_STATIC (decl) = 1; | |
881 | DECL_ARTIFICIAL (decl) = 1; | |
882 | TREE_USED (decl) = 1; | |
883 | DECL_INITIAL (decl) = constructor; | |
884 | DECL_CONTEXT (decl) = NULL; | |
885 | OBJCMETA (decl, objc_meta, meta_base); | |
886 | ||
887 | /* We may be writing something else just now. | |
944fb799 | 888 | Postpone till end of input. */ |
d764a8e6 IS |
889 | DECL_DEFER_OUTPUT (decl) = 1; |
890 | pushdecl_top_level (decl); | |
891 | rest_of_decl_compilation (decl, 1, 0); | |
892 | ||
893 | /* Add the DECL to the head of this CLASS' list. */ | |
894 | TREE_PURPOSE (*chain) = tree_cons (NULL_TREE, decl, TREE_PURPOSE (*chain)); | |
895 | ||
896 | return decl; | |
897 | } | |
898 | ||
899 | static tree | |
900 | gnu_runtime_abi_01_build_const_string_constructor (location_t loc, tree string, | |
901 | int length) | |
902 | { | |
903 | tree constructor, fields; | |
9771b263 | 904 | vec<constructor_elt, va_gc> *v = NULL; |
944fb799 | 905 | |
d764a8e6 IS |
906 | /* GNU: (NXConstantString *) & ((__builtin_ObjCString) { NULL, string, length }) */ |
907 | fields = TYPE_FIELDS (internal_const_str_type); | |
908 | CONSTRUCTOR_APPEND_ELT (v, fields, build_int_cst (NULL_TREE, 0)); | |
909 | ||
910 | fields = DECL_CHAIN (fields); | |
944fb799 | 911 | CONSTRUCTOR_APPEND_ELT (v, fields, build_unary_op (loc, |
d764a8e6 IS |
912 | ADDR_EXPR, string, 1)); |
913 | ||
914 | fields = DECL_CHAIN (fields); | |
915 | CONSTRUCTOR_APPEND_ELT (v, fields, build_int_cst (NULL_TREE, length)); | |
916 | constructor = objc_build_constructor (internal_const_str_type, v); | |
917 | ||
918 | constructor = objc_add_static_instance (constructor, constant_string_type); | |
919 | return constructor; | |
920 | } | |
921 | ||
922 | /* --- metadata - module initializer --- */ | |
923 | ||
924 | /* The GNU runtime requires us to provide a static initializer function | |
925 | for each module: | |
926 | ||
927 | static void __objc_gnu_init (void) { | |
928 | __objc_exec_class (&L_OBJC_MODULES); | |
929 | } */ | |
930 | ||
931 | ||
932 | static void | |
933 | build_module_initializer_routine (void) | |
934 | { | |
935 | tree body; | |
936 | ||
937 | #ifdef OBJCPLUS | |
938 | push_lang_context (lang_name_c); /* extern "C" */ | |
939 | #endif | |
940 | ||
941 | objc_push_parm (build_decl (input_location, | |
942 | PARM_DECL, NULL_TREE, void_type_node)); | |
943 | #ifdef OBJCPLUS | |
944 | objc_start_function (get_identifier (TAG_GNUINIT), | |
945 | build_function_type_list (void_type_node, NULL_TREE), | |
946 | NULL_TREE, NULL_TREE); | |
947 | #else | |
948 | objc_start_function (get_identifier (TAG_GNUINIT), | |
949 | build_function_type_list (void_type_node, NULL_TREE), | |
a04a722b | 950 | NULL_TREE, objc_get_parm_info (0, NULL_TREE)); |
d764a8e6 IS |
951 | #endif |
952 | body = c_begin_compound_stmt (true); | |
953 | add_stmt (build_function_call | |
954 | (input_location, | |
955 | execclass_decl, | |
956 | build_tree_list | |
957 | (NULL_TREE, | |
958 | build_unary_op (input_location, ADDR_EXPR, | |
959 | UOBJC_MODULES_decl, 0)))); | |
960 | add_stmt (c_end_compound_stmt (input_location, body, true)); | |
961 | ||
962 | TREE_PUBLIC (current_function_decl) = 0; | |
963 | ||
964 | #ifndef OBJCPLUS | |
965 | /* For Objective-C++, we will need to call __objc_gnu_init | |
966 | from objc_generate_static_init_call() below. */ | |
967 | DECL_STATIC_CONSTRUCTOR (current_function_decl) = 1; | |
968 | #endif | |
969 | ||
970 | GNU_INIT_decl = current_function_decl; | |
971 | finish_function (); | |
972 | ||
973 | #ifdef OBJCPLUS | |
974 | pop_lang_context (); | |
975 | #endif | |
976 | } | |
977 | ||
978 | #ifdef OBJCPLUS | |
979 | /* Return 1 if the __objc_gnu_init function has been synthesized and needs | |
980 | to be called by the module initializer routine. */ | |
981 | ||
982 | int | |
983 | objc_static_init_needed_p (void) | |
984 | { | |
985 | return (GNU_INIT_decl != NULL_TREE); | |
986 | } | |
987 | ||
988 | /* Generate a call to the __objc_gnu_init initializer function. */ | |
989 | ||
990 | tree | |
991 | objc_generate_static_init_call (tree ctors ATTRIBUTE_UNUSED) | |
992 | { | |
993 | add_stmt (build_stmt (input_location, EXPR_STMT, | |
994 | build_function_call (input_location, | |
995 | GNU_INIT_decl, NULL_TREE))); | |
996 | ||
997 | return ctors; | |
998 | } | |
999 | #endif /* OBJCPLUS */ | |
1000 | ||
1001 | /* --- Output GNU Meta-data --- */ | |
1002 | ||
1003 | static void | |
1004 | generate_classref_translation_entry (tree chain) | |
1005 | { | |
1006 | tree expr, decl, type; | |
1007 | ||
1008 | decl = TREE_PURPOSE (chain); | |
1009 | type = TREE_TYPE (decl); | |
1010 | ||
1011 | expr = add_objc_string (TREE_VALUE (chain), class_names); | |
1012 | expr = convert (type, expr); /* cast! */ | |
1013 | ||
1014 | /* This is a class reference. It is re-written by the runtime, | |
1015 | but will be optimized away unless we force it. */ | |
1016 | DECL_PRESERVE_P (decl) = 1; | |
1017 | OBJCMETA (decl, objc_meta, meta_base); | |
1018 | finish_var_decl (decl, expr); | |
1019 | return; | |
1020 | } | |
1021 | ||
1022 | ||
1023 | static void | |
1024 | handle_impent (struct imp_entry *impent) | |
1025 | { | |
1026 | char *string; | |
1027 | ||
1028 | /* objc_implementation_context = impent->imp_context; | |
1029 | implementation_template = impent->imp_template;*/ | |
1030 | ||
1031 | switch (TREE_CODE (impent->imp_context)) | |
1032 | { | |
1033 | case CLASS_IMPLEMENTATION_TYPE: | |
1034 | { | |
1035 | const char *const class_name = | |
1036 | IDENTIFIER_POINTER (CLASS_NAME (impent->imp_context)); | |
944fb799 | 1037 | |
d764a8e6 | 1038 | string = (char *) alloca (strlen (class_name) + 30); |
944fb799 | 1039 | |
d764a8e6 IS |
1040 | sprintf (string, "__objc_class_name_%s", class_name); |
1041 | break; | |
1042 | } | |
1043 | case CATEGORY_IMPLEMENTATION_TYPE: | |
1044 | { | |
1045 | const char *const class_name = | |
1046 | IDENTIFIER_POINTER (CLASS_NAME (impent->imp_context)); | |
1047 | const char *const class_super_name = | |
1048 | IDENTIFIER_POINTER (CLASS_SUPER_NAME (impent->imp_context)); | |
944fb799 | 1049 | |
d764a8e6 IS |
1050 | string = (char *) alloca (strlen (class_name) |
1051 | + strlen (class_super_name) + 30); | |
944fb799 | 1052 | |
d764a8e6 IS |
1053 | /* Do the same for categories. Even though no references to |
1054 | these symbols are generated automatically by the compiler, | |
1055 | it gives you a handle to pull them into an archive by | |
1056 | hand. */ | |
1057 | sprintf (string, "*__objc_category_name_%s_%s", class_name, class_super_name); | |
1058 | break; | |
1059 | } | |
1060 | default: | |
1061 | return; | |
1062 | } | |
1063 | ||
1064 | { | |
1065 | tree decl, init; | |
1066 | ||
1067 | init = integer_zero_node; | |
1068 | decl = build_decl (input_location, | |
1069 | VAR_DECL, get_identifier (string), TREE_TYPE (init)); | |
1070 | TREE_PUBLIC (decl) = 1; | |
1071 | TREE_READONLY (decl) = 1; | |
1072 | TREE_USED (decl) = 1; | |
1073 | TREE_CONSTANT (decl) = 1; | |
1074 | DECL_CONTEXT (decl) = NULL_TREE; | |
1075 | DECL_ARTIFICIAL (decl) = 1; | |
1076 | TREE_STATIC (decl) = 1; | |
1077 | DECL_INITIAL (decl) = error_mark_node; /* A real initializer is coming... */ | |
1078 | /* We must force the reference. */ | |
1079 | DECL_PRESERVE_P (decl) = 1; | |
1080 | ||
1081 | finish_var_decl(decl, init) ; | |
1082 | } | |
1083 | } | |
1084 | ||
1085 | tree | |
1086 | build_protocol_initializer (tree type, tree protocol_name, tree protocol_list, | |
1087 | tree inst_methods, tree class_methods) | |
1088 | { | |
1089 | tree expr, ttyp; | |
1090 | location_t loc; | |
9771b263 | 1091 | vec<constructor_elt, va_gc> *inits = NULL; |
d764a8e6 IS |
1092 | |
1093 | /* TODO: pass the loc in or find it from args. */ | |
1094 | loc = input_location; | |
944fb799 | 1095 | ttyp = build_pointer_type (xref_tag (RECORD_TYPE, |
d764a8e6 IS |
1096 | get_identifier (UTAG_CLASS))); |
1097 | /* Filling the "isa" in with a version allows the runtime system to | |
1098 | detect this ... */ | |
1099 | expr = build_int_cst (ttyp, PROTOCOL_VERSION); | |
1100 | ||
1101 | CONSTRUCTOR_APPEND_ELT (inits, NULL_TREE, expr); | |
1102 | ||
1103 | CONSTRUCTOR_APPEND_ELT (inits, NULL_TREE, protocol_name); | |
1104 | CONSTRUCTOR_APPEND_ELT (inits, NULL_TREE, protocol_list); | |
1105 | ||
1106 | ttyp = objc_method_proto_list_ptr; | |
1107 | if (inst_methods) | |
1108 | expr = convert (ttyp, build_unary_op (loc, ADDR_EXPR, inst_methods, 0)); | |
1109 | else | |
1110 | expr = convert (ttyp, null_pointer_node); | |
1111 | CONSTRUCTOR_APPEND_ELT (inits, NULL_TREE, expr); | |
1112 | ||
1113 | if (class_methods) | |
1114 | expr = convert (ttyp, build_unary_op (loc, ADDR_EXPR, class_methods, 0)); | |
1115 | else | |
1116 | expr = convert (ttyp, null_pointer_node); | |
1117 | CONSTRUCTOR_APPEND_ELT (inits, NULL_TREE, expr); | |
1118 | ||
1119 | return objc_build_constructor (type, inits); | |
1120 | } | |
1121 | ||
1122 | static tree | |
1123 | generate_protocol_list (tree i_or_p, tree klass_ctxt) | |
1124 | { | |
1125 | tree array_type, ptype, refs_decl, lproto, e, plist; | |
9771b263 | 1126 | vec<constructor_elt, va_gc> *v = NULL; |
d764a8e6 IS |
1127 | char buf[BUFSIZE]; |
1128 | int size = 0; | |
1129 | ||
1130 | switch (TREE_CODE (i_or_p)) | |
1131 | { | |
1132 | case CLASS_INTERFACE_TYPE: | |
1133 | case CATEGORY_INTERFACE_TYPE: | |
1134 | plist = CLASS_PROTOCOL_LIST (i_or_p); | |
1135 | break; | |
1136 | case PROTOCOL_INTERFACE_TYPE: | |
1137 | plist = PROTOCOL_LIST (i_or_p); | |
1138 | break; | |
1139 | default: | |
1140 | gcc_unreachable (); | |
1141 | } | |
1142 | ||
1143 | /* Compute size. */ | |
1144 | for (lproto = plist; lproto; lproto = TREE_CHAIN (lproto)) | |
1145 | if (TREE_CODE (TREE_VALUE (lproto)) == PROTOCOL_INTERFACE_TYPE | |
1146 | && PROTOCOL_FORWARD_DECL (TREE_VALUE (lproto))) | |
1147 | size++; | |
1148 | ||
1149 | /* Build initializer. */ | |
1150 | CONSTRUCTOR_APPEND_ELT (v, NULL_TREE, build_int_cst (NULL_TREE, 0)); | |
1151 | e = build_int_cst (build_pointer_type (objc_protocol_template), size); | |
1152 | CONSTRUCTOR_APPEND_ELT (v, NULL_TREE, e); | |
1153 | ||
1154 | for (lproto = plist; lproto; lproto = TREE_CHAIN (lproto)) | |
1155 | { | |
1156 | tree pval = TREE_VALUE (lproto); | |
1157 | ||
1158 | if (TREE_CODE (pval) == PROTOCOL_INTERFACE_TYPE | |
1159 | && PROTOCOL_FORWARD_DECL (pval)) | |
1160 | { | |
1161 | tree fwref = PROTOCOL_FORWARD_DECL (pval); | |
1162 | location_t loc = DECL_SOURCE_LOCATION (fwref) ; | |
1163 | e = build_unary_op (loc, ADDR_EXPR, fwref, 0); | |
1164 | CONSTRUCTOR_APPEND_ELT (v, NULL_TREE, e); | |
1165 | } | |
1166 | } | |
1167 | ||
1168 | /* static struct objc_protocol *refs[n]; */ | |
1169 | ||
1170 | switch (TREE_CODE (i_or_p)) | |
1171 | { | |
1172 | case PROTOCOL_INTERFACE_TYPE: | |
944fb799 | 1173 | snprintf (buf, BUFSIZE, "_OBJC_ProtocolRefs_%s", |
d764a8e6 IS |
1174 | IDENTIFIER_POINTER (PROTOCOL_NAME (i_or_p))); |
1175 | break; | |
1176 | case CLASS_INTERFACE_TYPE: | |
944fb799 | 1177 | snprintf (buf, BUFSIZE, "_OBJC_ClassProtocols_%s", |
d764a8e6 IS |
1178 | IDENTIFIER_POINTER (CLASS_NAME (i_or_p))); |
1179 | break; | |
1180 | case CATEGORY_INTERFACE_TYPE: | |
944fb799 | 1181 | snprintf (buf, BUFSIZE, "_OBJC_CategoryProtocols_%s_%s", |
d764a8e6 IS |
1182 | IDENTIFIER_POINTER (CLASS_NAME (klass_ctxt)), |
1183 | IDENTIFIER_POINTER (CLASS_SUPER_NAME (klass_ctxt))); | |
1184 | break; | |
1185 | default: | |
1186 | gcc_unreachable (); | |
1187 | } | |
1188 | ||
1189 | ptype = build_pointer_type (objc_protocol_template); | |
1190 | array_type = build_sized_array_type (ptype, size + 3); | |
1191 | refs_decl = start_var_decl (array_type, buf); | |
1192 | OBJCMETA (refs_decl, objc_meta, meta_base); | |
1193 | finish_var_decl (refs_decl, | |
1194 | objc_build_constructor (TREE_TYPE (refs_decl), v)); | |
1195 | ||
1196 | return refs_decl; | |
1197 | } | |
1198 | ||
944fb799 | 1199 | static tree |
d764a8e6 IS |
1200 | generate_v1_meth_descriptor_table (tree chain, tree protocol, const char *prefix) |
1201 | { | |
1202 | tree method_list_template, initlist, decl; | |
1203 | int size; | |
9771b263 | 1204 | vec<constructor_elt, va_gc> *v = NULL; |
d764a8e6 IS |
1205 | char buf[BUFSIZE]; |
1206 | ||
1207 | if (!chain || !prefix) | |
1208 | return NULL_TREE; | |
1209 | ||
1210 | if (!objc_method_prototype_template) | |
1211 | objc_method_prototype_template = build_method_prototype_template (); | |
944fb799 | 1212 | |
d764a8e6 | 1213 | size = list_length (chain); |
944fb799 | 1214 | method_list_template = |
d764a8e6 IS |
1215 | build_method_prototype_list_template (objc_method_prototype_template, |
1216 | size); | |
944fb799 | 1217 | snprintf (buf, BUFSIZE, "%s_%s", prefix, |
d764a8e6 IS |
1218 | IDENTIFIER_POINTER (PROTOCOL_NAME (protocol))); |
1219 | ||
1220 | decl = start_var_decl (method_list_template, buf); | |
1221 | ||
1222 | CONSTRUCTOR_APPEND_ELT (v, NULL_TREE, build_int_cst (NULL_TREE, size)); | |
944fb799 | 1223 | initlist = |
d764a8e6 IS |
1224 | build_descriptor_table_initializer (objc_method_prototype_template, |
1225 | chain); | |
1226 | CONSTRUCTOR_APPEND_ELT (v, NULL_TREE, initlist); | |
1227 | OBJCMETA (decl, objc_meta, meta_base); | |
1228 | finish_var_decl (decl, objc_build_constructor (method_list_template, v)); | |
1229 | return decl; | |
1230 | } | |
1231 | ||
1232 | /* For each protocol which was referenced either from a @protocol() | |
1233 | expression, or because a class/category implements it (then a | |
1234 | pointer to the protocol is stored in the struct describing the | |
1235 | class/category), we create a statically allocated instance of the | |
1236 | Protocol class. The code is written in such a way as to generate | |
1237 | as few Protocol objects as possible; we generate a unique Protocol | |
1238 | instance for each protocol, and we don't generate a Protocol | |
1239 | instance if the protocol is never referenced (either from a | |
1240 | @protocol() or from a class/category implementation). These | |
1241 | statically allocated objects can be referred to via the static | |
1242 | (that is, private to this module) symbols _OBJC_PROTOCOL_n. | |
1243 | ||
1244 | The statically allocated Protocol objects that we generate here | |
1245 | need to be fixed up at runtime in order to be used: the 'isa' | |
1246 | pointer of the objects need to be set up to point to the 'Protocol' | |
1247 | class, as known at runtime. | |
1248 | ||
1249 | The GNU runtime fixes up all protocols before user code from the module | |
1250 | is executed; it requires pointers to those symbols | |
1251 | to be put in the objc_symtab (which is then passed as argument to | |
1252 | the function __objc_exec_class() which the compiler sets up to be | |
1253 | executed automatically when the module is loaded); setup of those | |
1254 | Protocol objects happen in two ways in the GNU runtime: all | |
1255 | Protocol objects referred to by a class or category implementation | |
1256 | are fixed up when the class/category is loaded; all Protocol | |
1257 | objects referred to by a @protocol() expression are added by the | |
1258 | compiler to the list of statically allocated instances to fixup | |
1259 | (the same list holding the statically allocated constant string | |
1260 | objects). Because, as explained above, the compiler generates as | |
1261 | few Protocol objects as possible, some Protocol object might end up | |
1262 | being referenced multiple times when compiled with the GNU runtime, | |
1263 | and end up being fixed up multiple times at runtime initialization. | |
1264 | But that doesn't hurt, it's just a little inefficient. */ | |
1265 | ||
1266 | static void | |
1267 | generate_protocols (void) | |
1268 | { | |
1269 | tree p, encoding; | |
1270 | tree decl; | |
1271 | tree initlist, protocol_name_expr, refs_decl, refs_expr; | |
1272 | ||
1273 | /* If a protocol was directly referenced, pull in indirect references. */ | |
1274 | for (p = protocol_chain; p; p = TREE_CHAIN (p)) | |
1275 | if (PROTOCOL_FORWARD_DECL (p) && PROTOCOL_LIST (p)) | |
1276 | generate_protocol_references (PROTOCOL_LIST (p)); | |
1277 | ||
1278 | for (p = protocol_chain; p; p = TREE_CHAIN (p)) | |
1279 | { | |
1280 | tree nst_methods = PROTOCOL_NST_METHODS (p); | |
1281 | tree cls_methods = PROTOCOL_CLS_METHODS (p); | |
1282 | ||
1283 | /* If protocol wasn't referenced, don't generate any code. */ | |
1284 | decl = PROTOCOL_FORWARD_DECL (p); | |
1285 | ||
1286 | if (!decl) | |
1287 | continue; | |
1288 | ||
1289 | /* Make sure we link in the Protocol class. */ | |
1290 | add_class_reference (get_identifier (PROTOCOL_OBJECT_CLASS_NAME)); | |
1291 | ||
1292 | while (nst_methods) | |
1293 | { | |
1294 | if (! METHOD_ENCODING (nst_methods)) | |
1295 | { | |
1296 | encoding = encode_method_prototype (nst_methods); | |
1297 | METHOD_ENCODING (nst_methods) = encoding; | |
1298 | } | |
1299 | nst_methods = DECL_CHAIN (nst_methods); | |
1300 | } | |
1301 | ||
944fb799 | 1302 | UOBJC_INSTANCE_METHODS_decl = |
d764a8e6 IS |
1303 | generate_v1_meth_descriptor_table (PROTOCOL_NST_METHODS (p), p, |
1304 | "_OBJC_PROTOCOL_INSTANCE_METHODS"); | |
1305 | ||
1306 | while (cls_methods) | |
1307 | { | |
1308 | if (! METHOD_ENCODING (cls_methods)) | |
1309 | { | |
1310 | encoding = encode_method_prototype (cls_methods); | |
1311 | METHOD_ENCODING (cls_methods) = encoding; | |
1312 | } | |
1313 | ||
1314 | cls_methods = DECL_CHAIN (cls_methods); | |
1315 | } | |
1316 | ||
944fb799 | 1317 | UOBJC_CLASS_METHODS_decl = |
d764a8e6 IS |
1318 | generate_v1_meth_descriptor_table (PROTOCOL_CLS_METHODS (p), p, |
1319 | "_OBJC_PROTOCOL_CLASS_METHODS"); | |
1320 | /* generate_method_descriptors (p);*/ | |
1321 | ||
1322 | if (PROTOCOL_LIST (p)) | |
1323 | refs_decl = generate_protocol_list (p, NULL_TREE); | |
1324 | else | |
1325 | refs_decl = 0; | |
1326 | ||
1327 | /* static struct objc_protocol _OBJC_PROTOCOL_<mumble>; */ | |
1328 | protocol_name_expr = add_objc_string (PROTOCOL_NAME (p), class_names); | |
1329 | ||
1330 | if (refs_decl) | |
1331 | refs_expr = convert (build_pointer_type (build_pointer_type | |
1332 | (objc_protocol_template)), | |
1333 | build_unary_op (input_location, | |
1334 | ADDR_EXPR, refs_decl, 0)); | |
1335 | else | |
1336 | refs_expr = build_int_cst (NULL_TREE, 0); | |
1337 | ||
1338 | /* UOBJC_INSTANCE_METHODS_decl/UOBJC_CLASS_METHODS_decl are set | |
1339 | by generate_method_descriptors, which is called above. */ | |
1340 | initlist = build_protocol_initializer (TREE_TYPE (decl), | |
1341 | protocol_name_expr, refs_expr, | |
1342 | UOBJC_INSTANCE_METHODS_decl, | |
1343 | UOBJC_CLASS_METHODS_decl); | |
1344 | finish_var_decl (decl, initlist); | |
1345 | } | |
1346 | } | |
1347 | ||
1348 | static tree | |
1349 | generate_dispatch_table (tree chain, const char *name) | |
1350 | { | |
1351 | tree decl, method_list_template, initlist; | |
9771b263 | 1352 | vec<constructor_elt, va_gc> *v = NULL; |
d764a8e6 IS |
1353 | int size = list_length (chain); |
1354 | ||
1355 | if (!objc_method_template) | |
1356 | objc_method_template = build_method_template (); | |
1357 | ||
1358 | method_list_template = build_method_list_template (objc_method_template, | |
1359 | size); | |
1360 | initlist = build_dispatch_table_initializer (objc_method_template, chain); | |
1361 | ||
1362 | decl = start_var_decl (method_list_template, name); | |
1363 | ||
1364 | CONSTRUCTOR_APPEND_ELT (v, NULL_TREE, integer_zero_node); | |
944fb799 | 1365 | CONSTRUCTOR_APPEND_ELT (v, NULL_TREE, |
d764a8e6 IS |
1366 | build_int_cst (integer_type_node, size)); |
1367 | CONSTRUCTOR_APPEND_ELT (v, NULL_TREE, initlist); | |
1368 | ||
1369 | OBJCMETA (decl, objc_meta, meta_base); | |
1370 | finish_var_decl (decl, | |
1371 | objc_build_constructor (TREE_TYPE (decl), v)); | |
1372 | ||
1373 | return decl; | |
1374 | } | |
1375 | ||
1376 | /* Init a category. */ | |
1377 | static tree | |
1378 | build_category_initializer (tree type, tree cat_name, tree class_name, | |
1379 | tree inst_methods, tree class_methods, | |
1380 | tree protocol_list) | |
1381 | { | |
1382 | tree expr, ltyp; | |
1383 | location_t loc; | |
9771b263 | 1384 | vec<constructor_elt, va_gc> *v = NULL; |
d764a8e6 IS |
1385 | |
1386 | /* TODO: pass the loc in or find it from args. */ | |
1387 | /* TODO: pass the loc in or find it from args. */ | |
1388 | loc = UNKNOWN_LOCATION; | |
1389 | CONSTRUCTOR_APPEND_ELT (v, NULL_TREE, cat_name); | |
1390 | CONSTRUCTOR_APPEND_ELT (v, NULL_TREE, class_name); | |
1391 | ||
1392 | ltyp = objc_method_list_ptr; | |
1393 | if (inst_methods) | |
1394 | expr = convert (ltyp, build_unary_op (loc, ADDR_EXPR, inst_methods, 0)); | |
1395 | else | |
1396 | expr = convert (ltyp, null_pointer_node); | |
1397 | CONSTRUCTOR_APPEND_ELT (v, NULL_TREE, expr); | |
1398 | ||
1399 | if (class_methods) | |
1400 | expr = convert (ltyp, build_unary_op (loc, ADDR_EXPR, class_methods, 0)); | |
1401 | else | |
1402 | expr = convert (ltyp, null_pointer_node); | |
1403 | CONSTRUCTOR_APPEND_ELT (v, NULL_TREE, expr); | |
1404 | ||
1405 | /* protocol_list = */ | |
1406 | ltyp = build_pointer_type (build_pointer_type (objc_protocol_template)); | |
1407 | if (protocol_list) | |
1408 | expr = convert (ltyp, build_unary_op (loc, ADDR_EXPR, protocol_list, 0)); | |
1409 | else | |
1410 | expr = convert (ltyp, null_pointer_node); | |
1411 | CONSTRUCTOR_APPEND_ELT (v, NULL_TREE, expr); | |
1412 | ||
1413 | return objc_build_constructor (type, v); | |
1414 | } | |
1415 | ||
1416 | /* static struct objc_category _OBJC_CATEGORY_<name> = { ... }; */ | |
1417 | ||
1418 | static void | |
1419 | generate_category (struct imp_entry *impent) | |
1420 | { | |
1421 | tree initlist, cat_name_expr, class_name_expr; | |
1422 | tree protocol_decl, category, cat_decl; | |
1423 | tree inst_methods = NULL_TREE, class_methods = NULL_TREE; | |
1424 | tree cat = impent->imp_context; | |
1425 | char buf[BUFSIZE]; | |
1426 | ||
1427 | cat_decl = impent->class_decl; | |
1428 | ||
1429 | add_class_reference (CLASS_NAME (cat)); | |
1430 | cat_name_expr = add_objc_string (CLASS_SUPER_NAME (cat), class_names); | |
1431 | ||
1432 | class_name_expr = add_objc_string (CLASS_NAME (cat), class_names); | |
1433 | ||
1434 | category = lookup_category (impent->imp_template, CLASS_SUPER_NAME (cat)); | |
1435 | ||
1436 | if (category && CLASS_PROTOCOL_LIST (category)) | |
1437 | { | |
1438 | generate_protocol_references (CLASS_PROTOCOL_LIST (category)); | |
1439 | protocol_decl = generate_protocol_list (category, cat); | |
1440 | } | |
1441 | else | |
1442 | protocol_decl = 0; | |
1443 | ||
1444 | if (CLASS_NST_METHODS (cat)) | |
1445 | { | |
1446 | snprintf (buf, BUFSIZE, "_OBJC_CategoryInstanceMethods_%s_%s", | |
1447 | IDENTIFIER_POINTER (CLASS_NAME (cat)), | |
1448 | IDENTIFIER_POINTER (CLASS_SUPER_NAME (cat))); | |
1449 | inst_methods = generate_dispatch_table (CLASS_NST_METHODS (cat), buf); | |
1450 | } | |
1451 | ||
1452 | if (CLASS_CLS_METHODS (cat)) | |
1453 | { | |
1454 | snprintf (buf, BUFSIZE, "_OBJC_CategoryClassMethods_%s_%s", | |
1455 | IDENTIFIER_POINTER (CLASS_NAME (cat)), | |
1456 | IDENTIFIER_POINTER (CLASS_SUPER_NAME (cat))); | |
1457 | class_methods = generate_dispatch_table (CLASS_CLS_METHODS (cat), buf); | |
1458 | } | |
1459 | ||
1460 | initlist = build_category_initializer (TREE_TYPE (cat_decl), | |
1461 | cat_name_expr, class_name_expr, | |
1462 | inst_methods, class_methods, | |
1463 | protocol_decl); | |
1464 | /* Finish and initialize the forward decl. */ | |
1465 | finish_var_decl (cat_decl, initlist); | |
1466 | impent->class_decl = cat_decl; | |
1467 | } | |
1468 | ||
1469 | /* struct _objc_class { | |
1470 | struct objc_class *isa; | |
1471 | struct objc_class *super_class; | |
1472 | char *name; | |
1473 | long version; | |
1474 | long info; | |
1475 | long instance_size; | |
1476 | struct objc_ivar_list *ivars; | |
1477 | struct objc_method_list *methods; | |
d4c433f9 NP |
1478 | struct sarray *dtable; |
1479 | struct objc_class *subclass_list; | |
1480 | struct objc_class *sibling_class; | |
d764a8e6 | 1481 | struct objc_protocol_list *protocols; |
d764a8e6 IS |
1482 | void *gc_object_type; |
1483 | }; */ | |
1484 | ||
1485 | static tree | |
1486 | build_shared_structure_initializer (tree type, tree isa, tree super, | |
1487 | tree name, tree size, int status, | |
1488 | tree dispatch_table, tree ivar_list, | |
1489 | tree protocol_list) | |
1490 | { | |
1491 | tree expr, ltyp; | |
9771b263 | 1492 | vec<constructor_elt, va_gc> *v = NULL; |
d764a8e6 IS |
1493 | |
1494 | /* isa = */ | |
1495 | CONSTRUCTOR_APPEND_ELT (v, NULL_TREE, isa); | |
1496 | ||
1497 | /* super_class = */ | |
1498 | CONSTRUCTOR_APPEND_ELT (v, NULL_TREE, super); | |
1499 | ||
1500 | /* name = */ | |
1501 | CONSTRUCTOR_APPEND_ELT (v, NULL_TREE, default_conversion (name)); | |
1502 | ||
1503 | /* version = */ | |
1504 | CONSTRUCTOR_APPEND_ELT (v, NULL_TREE, | |
1505 | build_int_cst (long_integer_type_node, 0)); | |
1506 | ||
1507 | /* info = */ | |
1508 | CONSTRUCTOR_APPEND_ELT (v, NULL_TREE, | |
1509 | build_int_cst (long_integer_type_node, status)); | |
1510 | ||
1511 | /* instance_size = */ | |
1512 | CONSTRUCTOR_APPEND_ELT (v, NULL_TREE, | |
1513 | convert (long_integer_type_node, size)); | |
1514 | ||
1515 | /* objc_ivar_list = */ | |
1516 | if (!ivar_list) | |
944fb799 | 1517 | CONSTRUCTOR_APPEND_ELT (v, NULL_TREE, |
d764a8e6 IS |
1518 | build_int_cst (objc_ivar_list_ptr, 0)); |
1519 | else | |
1520 | { | |
1521 | expr = convert (objc_ivar_list_ptr, | |
944fb799 | 1522 | build_unary_op (input_location, ADDR_EXPR, |
d764a8e6 IS |
1523 | ivar_list, 0)); |
1524 | CONSTRUCTOR_APPEND_ELT (v, NULL_TREE, expr); | |
1525 | } | |
1526 | ||
1527 | /* objc_method_list = */ | |
1528 | if (!dispatch_table) | |
944fb799 | 1529 | CONSTRUCTOR_APPEND_ELT (v, NULL_TREE, |
d764a8e6 IS |
1530 | convert (objc_method_list_ptr, null_pointer_node)); |
1531 | else | |
1532 | { | |
1533 | expr = convert (objc_method_list_ptr, | |
944fb799 | 1534 | build_unary_op (input_location, ADDR_EXPR, |
d764a8e6 IS |
1535 | dispatch_table, 0)); |
1536 | CONSTRUCTOR_APPEND_ELT (v, NULL_TREE, expr); | |
1537 | } | |
1538 | ||
d4c433f9 | 1539 | /* FIXME: Remove NeXT runtime code. */ |
d764a8e6 IS |
1540 | if (flag_next_runtime) |
1541 | { | |
1542 | ltyp = build_pointer_type (xref_tag (RECORD_TYPE, | |
1543 | get_identifier ("objc_cache"))); | |
1544 | /* method_cache = */ | |
1545 | CONSTRUCTOR_APPEND_ELT (v, NULL_TREE, convert (ltyp, null_pointer_node)); | |
1546 | } | |
1547 | else | |
1548 | { | |
1549 | /* dtable = */ | |
1550 | CONSTRUCTOR_APPEND_ELT (v, NULL_TREE, build_int_cst (NULL_TREE, 0)); | |
1551 | ||
1552 | /* subclass_list = */ | |
1553 | CONSTRUCTOR_APPEND_ELT (v, NULL_TREE, build_int_cst (NULL_TREE, 0)); | |
1554 | ||
1555 | /* sibling_class = */ | |
1556 | CONSTRUCTOR_APPEND_ELT (v, NULL_TREE, build_int_cst (NULL_TREE, 0)); | |
1557 | } | |
1558 | ||
1559 | /* protocol_list = */ | |
1560 | ltyp = build_pointer_type (build_pointer_type (objc_protocol_template)); | |
1561 | if (! protocol_list) | |
1562 | CONSTRUCTOR_APPEND_ELT (v, NULL_TREE, build_int_cst (ltyp, 0)); | |
1563 | else | |
1564 | { | |
1565 | expr = convert (ltyp, | |
944fb799 | 1566 | build_unary_op (input_location, ADDR_EXPR, |
d764a8e6 IS |
1567 | protocol_list, 0)); |
1568 | CONSTRUCTOR_APPEND_ELT (v, NULL_TREE, expr); | |
1569 | } | |
1570 | ||
d4c433f9 | 1571 | /* FIXME: Remove NeXT runtime code. */ |
d764a8e6 IS |
1572 | if (flag_next_runtime) |
1573 | /* sel_id = NULL */ | |
1574 | CONSTRUCTOR_APPEND_ELT (v, NULL_TREE, build_int_cst (NULL_TREE, 0)); | |
1575 | ||
1576 | /* gc_object_type = NULL */ | |
1577 | CONSTRUCTOR_APPEND_ELT (v, NULL_TREE, build_int_cst (NULL_TREE, 0)); | |
1578 | ||
1579 | return objc_build_constructor (type, v); | |
1580 | } | |
1581 | ||
1582 | ||
1583 | static tree | |
1584 | generate_ivars_list (tree chain, const char *name) | |
1585 | { | |
1586 | tree initlist, ivar_list_template, decl; | |
1587 | int size; | |
9771b263 | 1588 | vec<constructor_elt, va_gc> *inits = NULL; |
d764a8e6 IS |
1589 | |
1590 | if (!chain) | |
1591 | return NULL_TREE; | |
1592 | ||
1593 | if (!objc_ivar_template) | |
1594 | objc_ivar_template = build_ivar_template (); | |
1595 | ||
1596 | size = ivar_list_length (chain); | |
1597 | ||
1598 | generating_instance_variables = 1; | |
1599 | ivar_list_template = build_ivar_list_template (objc_ivar_template, size); | |
1600 | initlist = build_ivar_list_initializer (objc_ivar_template, chain); | |
1601 | generating_instance_variables = 0; | |
1602 | ||
1603 | decl = start_var_decl (ivar_list_template, name); | |
1604 | ||
1605 | CONSTRUCTOR_APPEND_ELT (inits, NULL_TREE, build_int_cst (NULL_TREE, size)); | |
1606 | CONSTRUCTOR_APPEND_ELT (inits, NULL_TREE, initlist); | |
1607 | ||
1608 | OBJCMETA (decl, objc_meta, meta_base); | |
1609 | finish_var_decl (decl, | |
1610 | objc_build_constructor (TREE_TYPE (decl), inits)); | |
1611 | ||
1612 | return decl; | |
1613 | } | |
1614 | ||
1615 | /* static struct objc_class _OBJC_METACLASS_Foo={ ... }; | |
1616 | static struct objc_class _OBJC_CLASS_Foo={ ... }; */ | |
1617 | ||
1618 | static void | |
1619 | generate_class_structures (struct imp_entry *impent) | |
1620 | { | |
1621 | tree name_expr, super_expr, root_expr, class_decl, meta_decl; | |
1622 | tree my_root_id, my_super_id; | |
1623 | tree cast_type, initlist, protocol_decl; | |
1624 | tree inst_methods = NULL_TREE, class_methods = NULL_TREE; | |
1625 | tree chain, inst_ivars = NULL_TREE, class_ivars = NULL_TREE; | |
1626 | location_t loc; | |
1627 | char buf[BUFSIZE]; | |
1628 | int cls_flags = 0 ; | |
944fb799 | 1629 | |
d764a8e6 IS |
1630 | /* objc_implementation_context = impent->imp_context; |
1631 | implementation_template = impent->imp_template;*/ | |
1632 | class_decl = impent->class_decl; | |
1633 | meta_decl = impent->meta_decl; | |
1634 | /* UOBJC_CLASS_decl = impent->class_decl; | |
1635 | UOBJC_METACLASS_decl = impent->meta_decl;*/ | |
944fb799 | 1636 | |
d764a8e6 IS |
1637 | loc = DECL_SOURCE_LOCATION (impent->class_decl); |
1638 | ||
1639 | my_super_id = CLASS_SUPER_NAME (impent->imp_template); | |
1640 | if (my_super_id) | |
1641 | { | |
1642 | add_class_reference (my_super_id); | |
1643 | ||
1644 | /* Compute "my_root_id" - this is required for code generation. | |
1645 | the "isa" for all meta class structures points to the root of | |
1646 | the inheritance hierarchy (e.g. "__Object")... */ | |
1647 | my_root_id = my_super_id; | |
1648 | do | |
1649 | { | |
1650 | tree my_root_int = lookup_interface (my_root_id); | |
1651 | ||
1652 | if (my_root_int && CLASS_SUPER_NAME (my_root_int)) | |
1653 | my_root_id = CLASS_SUPER_NAME (my_root_int); | |
1654 | else | |
1655 | break; | |
1656 | } | |
1657 | while (1); | |
1658 | } | |
1659 | else | |
1660 | /* No super class. */ | |
1661 | my_root_id = CLASS_NAME (impent->imp_template); | |
1662 | ||
1663 | cast_type = build_pointer_type (objc_class_template); | |
1664 | name_expr = add_objc_string (CLASS_NAME (impent->imp_template), | |
1665 | class_names); | |
1666 | ||
1667 | /* Install class `isa' and `super' pointers at runtime. */ | |
1668 | if (my_super_id) | |
1669 | super_expr = add_objc_string (my_super_id, class_names); | |
1670 | else | |
1671 | super_expr = null_pointer_node; | |
944fb799 | 1672 | |
d764a8e6 IS |
1673 | super_expr = build_c_cast (loc, cast_type, super_expr); |
1674 | ||
1675 | root_expr = add_objc_string (my_root_id, class_names); | |
1676 | root_expr = build_c_cast (loc, cast_type, root_expr); | |
1677 | ||
1678 | if (CLASS_PROTOCOL_LIST (impent->imp_template)) | |
1679 | { | |
1680 | generate_protocol_references (CLASS_PROTOCOL_LIST (impent->imp_template)); | |
1681 | protocol_decl = generate_protocol_list (impent->imp_template, | |
1682 | impent->imp_context); | |
1683 | } | |
1684 | else | |
1685 | protocol_decl = NULL_TREE; | |
1686 | ||
1687 | if (CLASS_CLS_METHODS (impent->imp_context)) | |
1688 | { | |
1689 | snprintf (buf, BUFSIZE, "_OBJC_ClassMethods_%s", | |
1690 | IDENTIFIER_POINTER (CLASS_NAME (impent->imp_context))); | |
1691 | class_methods = generate_dispatch_table (CLASS_CLS_METHODS (impent->imp_context), | |
1692 | buf); | |
1693 | } | |
1694 | ||
1695 | if (CLASS_SUPER_NAME (impent->imp_template) == NULL_TREE | |
1696 | && (chain = TYPE_FIELDS (objc_class_template))) | |
1697 | { | |
1698 | snprintf (buf, BUFSIZE, "_OBJC_ClassIvars_%s", | |
1699 | IDENTIFIER_POINTER (CLASS_NAME (impent->imp_context))); | |
1700 | class_ivars = generate_ivars_list (chain, buf); | |
1701 | } | |
1702 | ||
1703 | /* static struct objc_class _OBJC_METACLASS_Foo = { ... }; */ | |
1704 | ||
944fb799 MS |
1705 | initlist = |
1706 | build_shared_structure_initializer | |
d764a8e6 IS |
1707 | (TREE_TYPE (meta_decl), |
1708 | root_expr, super_expr, name_expr, | |
944fb799 | 1709 | convert (integer_type_node, |
d764a8e6 IS |
1710 | TYPE_SIZE_UNIT (objc_class_template)), |
1711 | CLS_META, class_methods, class_ivars, | |
1712 | protocol_decl); | |
1713 | ||
1714 | finish_var_decl (meta_decl, initlist); | |
1715 | impent->meta_decl = meta_decl; | |
1716 | ||
1717 | /* static struct objc_class _OBJC_CLASS_Foo={ ... }; */ | |
1718 | if (CLASS_NST_METHODS (impent->imp_context)) | |
1719 | { | |
1720 | snprintf (buf, BUFSIZE, "_OBJC_InstanceMethods_%s", | |
1721 | IDENTIFIER_POINTER (CLASS_NAME (impent->imp_context))); | |
1722 | inst_methods = generate_dispatch_table (CLASS_NST_METHODS (impent->imp_context), | |
1723 | buf); | |
1724 | } | |
1725 | ||
1726 | if ((chain = CLASS_IVARS (impent->imp_template))) | |
1727 | { | |
1728 | snprintf (buf, BUFSIZE, "_OBJC_InstanceIvars_%s", | |
1729 | IDENTIFIER_POINTER (CLASS_NAME (impent->imp_context))); | |
1730 | inst_ivars = generate_ivars_list (chain, buf); | |
1731 | } | |
1732 | ||
944fb799 MS |
1733 | initlist = |
1734 | build_shared_structure_initializer | |
d764a8e6 IS |
1735 | (TREE_TYPE (class_decl), |
1736 | build_unary_op (loc, ADDR_EXPR, meta_decl, 0), | |
1737 | super_expr, name_expr, | |
1738 | convert (integer_type_node, | |
1739 | TYPE_SIZE_UNIT (CLASS_STATIC_TEMPLATE | |
1740 | (impent->imp_template))), | |
1741 | CLS_FACTORY | cls_flags, inst_methods, inst_ivars, | |
1742 | protocol_decl); | |
1743 | ||
1744 | finish_var_decl (class_decl, initlist); | |
1745 | impent->class_decl = class_decl; | |
1746 | } | |
1747 | ||
1748 | /* --- Output GNU Metadata --- */ | |
1749 | ||
1750 | /* TODO: Make this into an array of refs. */ | |
1751 | static void | |
1752 | handle_class_ref (tree chain) | |
1753 | { | |
1754 | const char *name = IDENTIFIER_POINTER (TREE_VALUE (chain)); | |
1755 | char *string = (char *) alloca (strlen (name) + 30); | |
1756 | tree decl; | |
1757 | tree exp; | |
1758 | ||
1759 | sprintf (string, "__objc_class_name_%s", name); | |
1760 | ||
1761 | /* Make a decl for this name, so we can use its address in a tree. */ | |
1762 | decl = build_decl (input_location, | |
1763 | VAR_DECL, get_identifier (string), TREE_TYPE (integer_zero_node)); | |
1764 | DECL_EXTERNAL (decl) = 1; | |
1765 | TREE_PUBLIC (decl) = 1; | |
1766 | DECL_CONTEXT (decl) = NULL_TREE; | |
1767 | finish_var_decl (decl, 0); | |
1768 | ||
1769 | /* Make a decl for the address. */ | |
1770 | sprintf (string, "__objc_class_ref_%s", name); | |
1771 | exp = build1 (ADDR_EXPR, string_type_node, decl); | |
1772 | decl = build_decl (input_location, | |
1773 | VAR_DECL, get_identifier (string), string_type_node); | |
1774 | TREE_STATIC (decl) = 1; | |
1775 | TREE_USED (decl) = 1; | |
1776 | DECL_READ_P (decl) = 1; | |
1777 | DECL_ARTIFICIAL (decl) = 1; | |
1778 | DECL_INITIAL (decl) = error_mark_node; | |
944fb799 | 1779 | |
d764a8e6 IS |
1780 | /* We must force the reference. */ |
1781 | DECL_PRESERVE_P (decl) = 1; | |
1782 | ||
1783 | DECL_CONTEXT (decl) = NULL_TREE; | |
1784 | finish_var_decl (decl, exp); | |
1785 | } | |
1786 | ||
1787 | static tree | |
1788 | get_proto_encoding (tree proto) | |
1789 | { | |
1790 | tree encoding; | |
1791 | if (proto) | |
1792 | { | |
1793 | if (! METHOD_ENCODING (proto)) | |
1794 | { | |
1795 | encoding = encode_method_prototype (proto); | |
1796 | METHOD_ENCODING (proto) = encoding; | |
1797 | } | |
1798 | else | |
1799 | encoding = METHOD_ENCODING (proto); | |
1800 | ||
1801 | return add_objc_string (encoding, meth_var_types); | |
1802 | } | |
1803 | else | |
1804 | return build_int_cst (NULL_TREE, 0); | |
1805 | } | |
1806 | ||
1807 | static void | |
1808 | build_gnu_selector_translation_table (void) | |
1809 | { | |
1810 | tree chain, expr; | |
9771b263 DN |
1811 | vec<constructor_elt, va_gc> *inits = NULL; |
1812 | vec<constructor_elt, va_gc> *v ; | |
d764a8e6 IS |
1813 | |
1814 | /* Cause the selector table (previously forward-declared) | |
1815 | to be actually output. */ | |
1816 | ||
1817 | for (chain = sel_ref_chain; chain; chain = TREE_CHAIN (chain)) | |
1818 | { | |
1819 | tree encoding; | |
1820 | if (warn_selector) | |
1821 | { | |
1822 | /* TODO: improve on the location for the diagnostic. */ | |
1823 | location_t loc = input_location; | |
1824 | diagnose_missing_method (TREE_VALUE (chain), loc); | |
1825 | } | |
1826 | ||
1827 | v = NULL; | |
1828 | expr = build_selector (TREE_VALUE (chain)); | |
1829 | encoding = get_proto_encoding (TREE_PURPOSE (chain)); | |
1830 | CONSTRUCTOR_APPEND_ELT (v, NULL_TREE, expr); | |
1831 | CONSTRUCTOR_APPEND_ELT (v, NULL_TREE, encoding); | |
1832 | expr = objc_build_constructor (objc_selector_template, v); | |
944fb799 | 1833 | |
d764a8e6 IS |
1834 | CONSTRUCTOR_APPEND_ELT (inits, NULL_TREE, expr); |
1835 | } /* each element in the chain */ | |
1836 | ||
1837 | /* List terminator. */ | |
1838 | v = NULL; | |
1839 | CONSTRUCTOR_APPEND_ELT (v, NULL_TREE, integer_zero_node); | |
1840 | CONSTRUCTOR_APPEND_ELT (v, NULL_TREE, integer_zero_node); | |
1841 | expr = objc_build_constructor (objc_selector_template, v); | |
1842 | ||
1843 | CONSTRUCTOR_APPEND_ELT (inits, NULL_TREE, expr); | |
1844 | expr = objc_build_constructor (TREE_TYPE (UOBJC_SELECTOR_TABLE_decl), | |
1845 | inits); | |
1846 | finish_var_decl (UOBJC_SELECTOR_TABLE_decl, expr); | |
1847 | } | |
1848 | ||
1849 | /* Output references to all statically allocated objects. Return the DECL | |
1850 | for the array built. */ | |
1851 | ||
1852 | static void | |
1853 | generate_static_references (void) | |
1854 | { | |
1855 | tree expr = NULL_TREE; | |
1856 | tree class_name, klass, decl; | |
1857 | tree cl_chain, in_chain, type | |
1858 | = build_array_type (build_pointer_type (void_type_node), NULL_TREE); | |
1859 | int num_inst, num_class; | |
1860 | char buf[BUFSIZE]; | |
9771b263 | 1861 | vec<constructor_elt, va_gc> *decls = NULL; |
d764a8e6 | 1862 | |
d4c433f9 | 1863 | /* FIXME: Remove NeXT runtime code. */ |
d764a8e6 IS |
1864 | if (flag_next_runtime) |
1865 | gcc_unreachable (); | |
1866 | ||
1867 | for (cl_chain = objc_static_instances, num_class = 0; | |
1868 | cl_chain; cl_chain = TREE_CHAIN (cl_chain), num_class++) | |
1869 | { | |
9771b263 | 1870 | vec<constructor_elt, va_gc> *v = NULL; |
d764a8e6 IS |
1871 | |
1872 | for (num_inst = 0, in_chain = TREE_PURPOSE (cl_chain); | |
1873 | in_chain; num_inst++, in_chain = TREE_CHAIN (in_chain)); | |
1874 | ||
1875 | snprintf (buf, BUFSIZE, "_OBJC_STATIC_INSTANCES_%d", num_class); | |
1876 | decl = start_var_decl (type, buf); | |
1877 | ||
1878 | /* Output {class_name, ...}. */ | |
1879 | klass = TREE_VALUE (cl_chain); | |
1880 | class_name = get_objc_string_decl (OBJC_TYPE_NAME (klass), class_names); | |
1881 | CONSTRUCTOR_APPEND_ELT (v, NULL_TREE, | |
944fb799 | 1882 | build_unary_op (input_location, |
d764a8e6 IS |
1883 | ADDR_EXPR, class_name, 1)); |
1884 | ||
1885 | /* Output {..., instance, ...}. */ | |
1886 | for (in_chain = TREE_PURPOSE (cl_chain); | |
1887 | in_chain; in_chain = TREE_CHAIN (in_chain)) | |
1888 | { | |
1889 | expr = build_unary_op (input_location, | |
1890 | ADDR_EXPR, TREE_VALUE (in_chain), 1); | |
1891 | CONSTRUCTOR_APPEND_ELT (v, NULL_TREE, expr); | |
1892 | } | |
1893 | ||
1894 | /* Output {..., NULL}. */ | |
1895 | CONSTRUCTOR_APPEND_ELT (v, NULL_TREE, build_int_cst (NULL_TREE, 0)); | |
1896 | ||
1897 | expr = objc_build_constructor (TREE_TYPE (decl), v); | |
1898 | OBJCMETA (decl, objc_meta, meta_base); | |
1899 | finish_var_decl (decl, expr); | |
1900 | CONSTRUCTOR_APPEND_ELT (decls, NULL_TREE, | |
1901 | build_unary_op (input_location, | |
1902 | ADDR_EXPR, decl, 1)); | |
1903 | } | |
1904 | ||
1905 | CONSTRUCTOR_APPEND_ELT (decls, NULL_TREE, build_int_cst (NULL_TREE, 0)); | |
1906 | expr = objc_build_constructor (type, decls); | |
1907 | static_instances_decl = start_var_decl (type, "_OBJC_STATIC_INSTANCES"); | |
1908 | OBJCMETA (static_instances_decl, objc_meta, meta_base); | |
1909 | finish_var_decl (static_instances_decl, expr); | |
1910 | } | |
1911 | ||
1912 | /* Create the initial value for the `defs' field of _objc_symtab. | |
1913 | This is a CONSTRUCTOR. */ | |
1914 | ||
1915 | static tree | |
1916 | init_def_list (tree type) | |
1917 | { | |
1918 | tree expr; | |
1919 | struct imp_entry *impent; | |
1920 | location_t loc; | |
9771b263 | 1921 | vec<constructor_elt, va_gc> *v = NULL; |
d764a8e6 IS |
1922 | |
1923 | if (imp_count) | |
1924 | for (impent = imp_list; impent; impent = impent->next) | |
1925 | { | |
1926 | if (TREE_CODE (impent->imp_context) == CLASS_IMPLEMENTATION_TYPE) | |
1927 | { | |
1928 | loc = DECL_SOURCE_LOCATION (impent->class_decl); | |
1929 | expr = build_unary_op (loc, | |
1930 | ADDR_EXPR, impent->class_decl, 0); | |
1931 | CONSTRUCTOR_APPEND_ELT (v, NULL_TREE, expr); | |
1932 | } | |
1933 | } | |
1934 | ||
1935 | if (cat_count) | |
1936 | for (impent = imp_list; impent; impent = impent->next) | |
1937 | { | |
1938 | if (TREE_CODE (impent->imp_context) == CATEGORY_IMPLEMENTATION_TYPE) | |
1939 | { | |
1940 | loc = DECL_SOURCE_LOCATION (impent->class_decl); | |
1941 | expr = build_unary_op (loc, | |
1942 | ADDR_EXPR, impent->class_decl, 0); | |
1943 | CONSTRUCTOR_APPEND_ELT (v, NULL_TREE, expr); | |
1944 | } | |
1945 | } | |
1946 | ||
1947 | loc = UNKNOWN_LOCATION; | |
1948 | /* statics = { ..., _OBJC_STATIC_INSTANCES, ... } */ | |
1949 | if (static_instances_decl) | |
1950 | expr = build_unary_op (loc, ADDR_EXPR, static_instances_decl, 0); | |
1951 | else | |
1952 | expr = integer_zero_node; | |
1953 | CONSTRUCTOR_APPEND_ELT (v, NULL_TREE, expr); | |
1954 | ||
1955 | return objc_build_constructor (type, v); | |
1956 | } | |
1957 | ||
1958 | /* Take care of defining and initializing _OBJC_SYMBOLS. */ | |
1959 | ||
1960 | /* Predefine the following data type: | |
1961 | ||
1962 | struct _objc_symtab | |
1963 | { | |
1964 | long sel_ref_cnt; | |
1965 | SEL *refs; | |
1966 | short cls_def_cnt; | |
1967 | short cat_def_cnt; | |
1968 | void *defs[cls_def_cnt + cat_def_cnt]; | |
1969 | }; */ | |
1970 | ||
1971 | static void | |
1972 | build_objc_symtab_template (void) | |
1973 | { | |
1974 | tree fields, array_type, *chain = NULL; | |
1975 | int index; | |
1976 | ||
1977 | objc_symtab_template = objc_start_struct (get_identifier (UTAG_SYMTAB)); | |
1978 | ||
1979 | /* long sel_ref_cnt; */ | |
1980 | fields = add_field_decl (long_integer_type_node, "sel_ref_cnt", &chain); | |
1981 | ||
1982 | /* SEL *refs; */ | |
1983 | add_field_decl (build_pointer_type (objc_selector_type), "refs", &chain); | |
1984 | ||
1985 | /* short cls_def_cnt; */ | |
1986 | add_field_decl (short_integer_type_node, "cls_def_cnt", &chain); | |
1987 | ||
1988 | /* short cat_def_cnt; */ | |
1989 | add_field_decl (short_integer_type_node, "cat_def_cnt", &chain); | |
1990 | ||
6d549148 | 1991 | /* Note that padding will be added here on LP64. */ |
d764a8e6 IS |
1992 | |
1993 | /* void *defs[imp_count + cat_count (+ 1)]; */ | |
1994 | /* NB: The index is one less than the size of the array. */ | |
1995 | index = imp_count + cat_count; | |
1996 | array_type = build_sized_array_type (ptr_type_node, index + 1); | |
1997 | add_field_decl (array_type, "defs", &chain); | |
1998 | ||
1999 | objc_finish_struct (objc_symtab_template, fields); | |
2000 | } | |
2001 | /* Construct the initial value for all of _objc_symtab. */ | |
2002 | ||
2003 | static tree | |
2004 | init_objc_symtab (tree type) | |
2005 | { | |
2006 | tree field, expr, ltyp; | |
2007 | location_t loc; | |
9771b263 | 2008 | vec<constructor_elt, va_gc> *v = NULL; |
d764a8e6 IS |
2009 | |
2010 | loc = UNKNOWN_LOCATION; | |
2011 | ||
2012 | /* sel_ref_cnt = { ..., 5, ... } */ | |
2013 | ||
2014 | CONSTRUCTOR_APPEND_ELT (v, NULL_TREE, | |
2015 | build_int_cst (long_integer_type_node, 0)); | |
2016 | ||
2017 | /* refs = { ..., _OBJC_SELECTOR_TABLE, ... } */ | |
2018 | ||
2019 | ltyp = build_pointer_type (objc_selector_type); | |
2020 | if (sel_ref_chain) | |
944fb799 | 2021 | expr = convert (ltyp, build_unary_op (loc, ADDR_EXPR, |
d764a8e6 IS |
2022 | UOBJC_SELECTOR_TABLE_decl, 1)); |
2023 | else | |
2024 | expr = convert (ltyp, null_pointer_node); | |
2025 | CONSTRUCTOR_APPEND_ELT (v, NULL_TREE, expr); | |
2026 | ||
2027 | /* cls_def_cnt = { ..., 5, ... } */ | |
2028 | ||
944fb799 | 2029 | CONSTRUCTOR_APPEND_ELT (v, NULL_TREE, |
d764a8e6 IS |
2030 | build_int_cst (short_integer_type_node, imp_count)); |
2031 | ||
2032 | /* cat_def_cnt = { ..., 5, ... } */ | |
2033 | ||
944fb799 | 2034 | CONSTRUCTOR_APPEND_ELT (v, NULL_TREE, |
d764a8e6 | 2035 | build_int_cst (short_integer_type_node, cat_count)); |
d4c433f9 | 2036 | |
d764a8e6 IS |
2037 | /* cls_def = { ..., { &Foo, &Bar, ...}, ... } */ |
2038 | ||
2039 | field = TYPE_FIELDS (type); | |
d764a8e6 IS |
2040 | field = DECL_CHAIN (DECL_CHAIN (DECL_CHAIN (DECL_CHAIN (field)))); |
2041 | ||
2042 | CONSTRUCTOR_APPEND_ELT (v, NULL_TREE, init_def_list (TREE_TYPE (field))); | |
2043 | ||
2044 | return objc_build_constructor (type, v); | |
2045 | } | |
2046 | ||
2047 | /* Create the declaration of _OBJC_SYMBOLS, with type `struct _objc_symtab' | |
2048 | and initialized appropriately. */ | |
2049 | ||
2050 | static void | |
2051 | generate_objc_symtab_decl (void) | |
2052 | { | |
2053 | build_objc_symtab_template (); | |
2054 | UOBJC_SYMBOLS_decl = start_var_decl (objc_symtab_template, "_OBJC_SYMBOLS"); | |
2055 | OBJCMETA (UOBJC_SYMBOLS_decl, objc_meta, meta_base); | |
2056 | finish_var_decl (UOBJC_SYMBOLS_decl, | |
2057 | init_objc_symtab (TREE_TYPE (UOBJC_SYMBOLS_decl))); | |
2058 | } | |
2059 | ||
2060 | static void | |
2061 | objc_generate_v1_gnu_metadata (void) | |
2062 | { | |
2063 | struct imp_entry *impent; | |
2064 | tree chain; | |
2065 | ||
2066 | /* Process the static instances here because initialization of objc_symtab | |
2067 | depends on them. */ | |
2068 | if (objc_static_instances) | |
2069 | generate_static_references (); | |
2070 | ||
2071 | objc_implementation_context = | |
2072 | implementation_template = | |
2073 | UOBJC_CLASS_decl = | |
2074 | UOBJC_METACLASS_decl = NULL_TREE; | |
2075 | ||
2076 | for (impent = imp_list; impent; impent = impent->next) | |
2077 | { | |
2078 | /* If -gen-decls is present, Dump the @interface of each class. | |
2079 | TODO: Dump the classes in the order they were found, rather than in | |
2080 | reverse order as we are doing now. */ | |
2081 | if (flag_gen_declaration) | |
2082 | dump_interface (gen_declaration_file, impent->imp_context); | |
2083 | ||
2084 | /* all of the following reference the string pool... */ | |
2085 | if (TREE_CODE (impent->imp_context) == CLASS_IMPLEMENTATION_TYPE) | |
2086 | generate_class_structures (impent); | |
2087 | else | |
2088 | generate_category (impent); | |
2089 | } | |
2090 | ||
2091 | /* If we are using an array of selectors, we must always | |
2092 | finish up the array decl even if no selectors were used. */ | |
2093 | build_gnu_selector_translation_table (); | |
2094 | ||
2095 | if (protocol_chain) | |
2096 | generate_protocols (); | |
2097 | ||
2098 | /* Arrange for ObjC data structures to be initialized at run time. */ | |
475b5d2a NP |
2099 | /* FIXME: Have some more elegant way to determine if we need to |
2100 | generate objc_symtab_decl or not, instead of checking these | |
2101 | global symbols. */ | |
2102 | if (imp_list || class_names_chain | |
2103 | || meth_var_names_chain || meth_var_types_chain || sel_ref_chain | |
2104 | || prop_names_attr_chain) | |
2105 | generate_objc_symtab_decl (); | |
2106 | ||
2107 | if (imp_list || class_names_chain || objc_static_instances | |
2108 | || meth_var_names_chain || meth_var_types_chain || sel_ref_chain) | |
2109 | { | |
2110 | /* Make sure that the meta-data are identified as being | |
2111 | GNU-runtime. */ | |
944fb799 | 2112 | build_module_descriptor (OBJC_VERSION, |
475b5d2a NP |
2113 | build_tree_list (objc_meta, meta_base)); |
2114 | build_module_initializer_routine (); | |
2115 | } | |
d764a8e6 IS |
2116 | |
2117 | /* Dump the class references. This forces the appropriate classes | |
2118 | to be linked into the executable image, preserving unix archive | |
2119 | semantics. This can be removed when we move to a more dynamically | |
2120 | linked environment. */ | |
2121 | ||
2122 | for (chain = cls_ref_chain; chain; chain = TREE_CHAIN (chain)) | |
2123 | { | |
2124 | handle_class_ref (chain); | |
2125 | if (TREE_PURPOSE (chain)) | |
2126 | generate_classref_translation_entry (chain); | |
2127 | } | |
2128 | ||
2129 | for (impent = imp_list; impent; impent = impent->next) | |
2130 | handle_impent (impent); | |
2131 | ||
2132 | generate_strings (); | |
2133 | } | |
2134 | ||
2135 | /* --- exceptions --- */ | |
2136 | ||
2137 | static GTY(()) tree objc_eh_personality_decl; | |
2138 | ||
2139 | static tree | |
2140 | objc_eh_runtime_type (tree type) | |
2141 | { | |
2142 | tree ident, eh_id, decl, str; | |
2143 | ||
2144 | if (type == error_mark_node | |
2145 | || errorcount || sorrycount) | |
2146 | { | |
2147 | /* Use 'ErrorMarkNode' as class name when error_mark_node is found | |
2148 | to prevent an ICE. Note that we know that the compiler will | |
2149 | terminate with an error and this 'ErrorMarkNode' class name will | |
2150 | never be actually used. */ | |
2151 | ident = get_identifier ("ErrorMarkNode"); | |
2152 | goto make_err_class; | |
2153 | } | |
2154 | ||
2155 | if (POINTER_TYPE_P (type) && objc_is_object_id (TREE_TYPE (type))) | |
2156 | /* We don't want to identify 'id' for GNU. Instead, build a 0 | |
2157 | entry in the exceptions table. */ | |
944fb799 | 2158 | return null_pointer_node; |
d764a8e6 IS |
2159 | |
2160 | if (!POINTER_TYPE_P (type) || !TYPED_OBJECT (TREE_TYPE (type))) | |
2161 | { | |
2162 | #ifdef OBJCPLUS | |
2163 | /* This routine is also called for c++ catch clauses; in which case, | |
2164 | we use the c++ typeinfo decl. */ | |
2165 | return build_eh_type_type (type); | |
2166 | #else | |
2167 | error ("non-objective-c type '%T' cannot be caught", type); | |
2168 | ident = get_identifier ("ErrorMarkNode"); | |
2169 | goto make_err_class; | |
2170 | #endif | |
2171 | } | |
2172 | else | |
2173 | ident = OBJC_TYPE_NAME (TREE_TYPE (type)); | |
2174 | ||
2175 | make_err_class: | |
2176 | /* If this class was already referenced, then it will be output during | |
2177 | meta-data emission, so we don't need to do it here. */ | |
2178 | decl = get_objc_string_decl (ident, class_names); | |
2179 | eh_id = add_objc_string (ident, class_names); | |
2180 | if (!decl) | |
2181 | { | |
2182 | /* Not found ... so we need to build it - from the freshly-entered id. */ | |
2183 | decl = get_objc_string_decl (ident, class_names); | |
2184 | str = my_build_string (IDENTIFIER_LENGTH (ident) + 1, | |
2185 | IDENTIFIER_POINTER (ident)); | |
2186 | /* We have to finalize this var here, because this might be called after | |
2187 | all the other metadata strings have been emitted. */ | |
2188 | finish_var_decl (decl, str); | |
2189 | } | |
2190 | return eh_id; | |
2191 | } | |
2192 | ||
2193 | static tree | |
2194 | objc_eh_personality (void) | |
2195 | { | |
2196 | if (!objc_eh_personality_decl) | |
2197 | #ifndef OBJCPLUS | |
2198 | objc_eh_personality_decl = build_personality_function ("gnu_objc"); | |
2199 | #else | |
2200 | objc_eh_personality_decl = build_personality_function ("gxx"); | |
2201 | #endif | |
2202 | return objc_eh_personality_decl; | |
2203 | } | |
2204 | ||
2205 | /* -- interfaces --- */ | |
2206 | ||
2207 | static tree | |
2208 | build_throw_stmt (location_t loc, tree throw_expr, bool rethrown ATTRIBUTE_UNUSED) | |
2209 | { | |
2210 | tree t; | |
9771b263 DN |
2211 | vec<tree, va_gc> *parms; |
2212 | vec_alloc (parms, 1); | |
d764a8e6 IS |
2213 | /* A throw is just a call to the runtime throw function with the |
2214 | object as a parameter. */ | |
9771b263 | 2215 | parms->quick_push (throw_expr); |
d764a8e6 | 2216 | t = build_function_call_vec (loc, objc_exception_throw_decl, parms, NULL); |
9771b263 | 2217 | vec_free (parms); |
d764a8e6 IS |
2218 | return add_stmt (t); |
2219 | } | |
2220 | ||
2221 | /* Build __builtin_eh_pointer. */ | |
2222 | ||
2223 | static tree | |
2224 | objc_build_exc_ptr (struct objc_try_context **x ATTRIBUTE_UNUSED) | |
2225 | { | |
2226 | tree t; | |
e79983f4 | 2227 | t = builtin_decl_explicit (BUILT_IN_EH_POINTER); |
d764a8e6 IS |
2228 | t = build_call_expr (t, 1, integer_zero_node); |
2229 | return fold_convert (objc_object_type, t); | |
2230 | } | |
2231 | ||
944fb799 | 2232 | static tree |
d764a8e6 IS |
2233 | begin_catch (struct objc_try_context **cur_try_context, tree type, |
2234 | tree decl, tree compound, bool ellipsis ATTRIBUTE_UNUSED) | |
2235 | { | |
2236 | tree t; | |
2237 | /* Record the data for the catch in the try context so that we can | |
2238 | finalize it later. */ | |
2239 | if (ellipsis) | |
2240 | t = build_stmt (input_location, CATCH_EXPR, NULL, compound); | |
2241 | else | |
2242 | t = build_stmt (input_location, CATCH_EXPR, type, compound); | |
2243 | (*cur_try_context)->current_catch = t; | |
2244 | ||
2245 | /* Initialize the decl from the EXC_PTR_EXPR we get from the runtime. */ | |
2246 | t = objc_build_exc_ptr (cur_try_context); | |
2247 | t = convert (TREE_TYPE (decl), t); | |
2248 | return build2 (MODIFY_EXPR, void_type_node, decl, t); | |
2249 | } | |
2250 | ||
944fb799 | 2251 | static void |
d764a8e6 IS |
2252 | finish_catch (struct objc_try_context **cur_try_context, tree current_catch) |
2253 | { | |
2254 | append_to_statement_list (current_catch, &((*cur_try_context)->catch_list)); | |
2255 | } | |
2256 | ||
944fb799 | 2257 | static tree |
d764a8e6 IS |
2258 | finish_try_stmt (struct objc_try_context **cur_try_context) |
2259 | { | |
2260 | struct objc_try_context *c = *cur_try_context; | |
2261 | tree stmt = c->try_body; | |
2262 | if (c->catch_list) | |
2263 | stmt = build_stmt (c->try_locus, TRY_CATCH_EXPR, stmt, c->catch_list); | |
2264 | if (c->finally_body) | |
2265 | stmt = build_stmt (c->try_locus, TRY_FINALLY_EXPR, stmt, c->finally_body); | |
2266 | return stmt; | |
2267 | } | |
2268 | ||
2269 | #include "gt-objc-objc-gnu-runtime-abi-01.h" |