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d4c433f9 | 1 | /* GNU Runtime ABI version 8 |
a5544970 | 2 | Copyright (C) 2011-2019 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" | |
c7131fb2 | 24 | #include "options.h" |
314e6352 | 25 | #include "tree.h" |
d8a2d370 | 26 | #include "stringpool.h" |
314e6352 | 27 | #include "attribs.h" |
d764a8e6 IS |
28 | |
29 | #ifdef OBJCPLUS | |
d4a10d0a | 30 | #include "cp/cp-tree.h" |
d764a8e6 | 31 | #else |
d4a10d0a SB |
32 | #include "c/c-tree.h" |
33 | #include "c/c-lang.h" | |
d764a8e6 IS |
34 | #endif |
35 | ||
36 | #include "langhooks.h" | |
37 | #include "c-family/c-objc.h" | |
38 | #include "objc-act.h" | |
39 | ||
40 | /* When building Objective-C++, we are not linking against the C front-end | |
41 | and so need to replicate the C tree-construction functions in some way. */ | |
42 | #ifdef OBJCPLUS | |
43 | #define OBJCP_REMAP_FUNCTIONS | |
44 | #include "objcp-decl.h" | |
45 | #endif /* OBJCPLUS */ | |
46 | ||
47 | #include "toplev.h" | |
d764a8e6 IS |
48 | #include "tree-iterator.h" |
49 | ||
50 | #include "objc-runtime-hooks.h" | |
51 | #include "objc-runtime-shared-support.h" | |
f027ee7c | 52 | #include "objc-encoding.h" |
d764a8e6 IS |
53 | |
54 | /* GNU runtime private definitions. */ | |
55 | #define DEF_CONSTANT_STRING_CLASS_NAME "NXConstantString" | |
56 | ||
57 | #define TAG_GETCLASS "objc_get_class" | |
58 | #define TAG_GETMETACLASS "objc_get_meta_class" | |
59 | ||
60 | #define TAG_MSGSEND "objc_msg_lookup" | |
61 | #define TAG_MSGSENDSUPER "objc_msg_lookup_super" | |
62 | ||
63 | /* GNU-specific tags. */ | |
64 | ||
65 | #define TAG_EXECCLASS "__objc_exec_class" | |
66 | #define TAG_GNUINIT "__objc_gnu_init" | |
67 | ||
68 | /* The version identifies which language generation and runtime | |
69 | the module (file) was compiled for, and is recorded in the | |
70 | module descriptor. */ | |
71 | #define OBJC_VERSION 8 | |
72 | ||
73 | #define PROTOCOL_VERSION 2 | |
74 | ||
75 | /* This macro provides a method of removing ambiguity between runtimes | |
76 | when LTO is in use on targets supporting multiple runtimes. | |
944fb799 | 77 | |
d764a8e6 IS |
78 | For example, at present, any target that includes an implementation of |
79 | the NeXT runtime needs to place Objective-C meta-data into specific | |
944fb799 | 80 | named sections. This should _not_ be done for the GNU runtime, and the |
587ae1e3 | 81 | following macro is used to attach Objective-C private attributes that may |
d764a8e6 IS |
82 | be used to identify the runtime for which the meta-data are intended. */ |
83 | ||
84 | #define OBJCMETA(DECL,VERS,KIND) \ | |
85 | if (VERS) \ | |
86 | DECL_ATTRIBUTES (DECL) = build_tree_list ((VERS), (KIND)); | |
87 | ||
d764a8e6 IS |
88 | static void gnu_runtime_01_initialize (void); |
89 | ||
90 | static void build_selector_template (void); | |
91 | ||
92 | static tree gnu_runtime_abi_01_super_superclassfield_id (void); | |
93 | ||
94 | static tree gnu_runtime_abi_01_class_decl (tree); | |
95 | static tree gnu_runtime_abi_01_metaclass_decl (tree); | |
96 | static tree gnu_runtime_abi_01_category_decl (tree); | |
97 | static tree gnu_runtime_abi_01_protocol_decl (tree); | |
98 | static tree gnu_runtime_abi_01_string_decl (tree, const char *, string_section); | |
99 | ||
100 | static tree gnu_runtime_abi_01_get_class_reference (tree); | |
101 | static tree gnu_runtime_abi_01_build_typed_selector_reference (location_t, tree, | |
102 | tree); | |
103 | static tree gnu_runtime_abi_01_get_protocol_reference (location_t, tree); | |
104 | static tree gnu_runtime_abi_01_build_ivar_ref (location_t, tree, tree); | |
105 | static tree gnu_runtime_abi_01_get_class_super_ref (location_t, struct imp_entry *, bool); | |
106 | static tree gnu_runtime_abi_01_get_category_super_ref (location_t, struct imp_entry *, bool); | |
107 | ||
108 | static tree gnu_runtime_abi_01_receiver_is_class_object (tree); | |
9771b263 DN |
109 | static void gnu_runtime_abi_01_get_arg_type_list_base (vec<tree, va_gc> **, |
110 | tree, int, int); | |
d764a8e6 IS |
111 | static tree gnu_runtime_abi_01_build_objc_method_call (location_t, tree, tree, |
112 | tree, tree, tree, int); | |
113 | ||
114 | static bool gnu_runtime_abi_01_setup_const_string_class_decl (void); | |
115 | static tree gnu_runtime_abi_01_build_const_string_constructor (location_t, tree,int); | |
116 | ||
117 | static void objc_generate_v1_gnu_metadata (void); | |
118 | ||
119 | static tree objc_eh_runtime_type (tree type); | |
120 | static tree objc_eh_personality (void); | |
121 | static tree objc_build_exc_ptr (struct objc_try_context **); | |
122 | static tree build_throw_stmt (location_t, tree, bool); | |
123 | static tree begin_catch (struct objc_try_context **, tree, tree, tree, bool); | |
124 | static void finish_catch (struct objc_try_context **, tree); | |
125 | static tree finish_try_stmt (struct objc_try_context **); | |
126 | ||
944fb799 | 127 | bool |
d764a8e6 IS |
128 | objc_gnu_runtime_abi_01_init (objc_runtime_hooks *rthooks) |
129 | { | |
130 | /* GNU runtime does not need the compiler to change code in order to do GC. */ | |
131 | if (flag_objc_gc) | |
132 | { | |
64a5912c DM |
133 | warning_at (UNKNOWN_LOCATION, 0, |
134 | "%<-fobjc-gc%> is ignored for %<-fgnu-runtime%>"); | |
d764a8e6 IS |
135 | flag_objc_gc = 0; |
136 | } | |
137 | ||
138 | /* Although I guess we could, we don't currently support SJLJ exceptions for the | |
139 | GNU runtime. */ | |
140 | if (flag_objc_sjlj_exceptions) | |
141 | { | |
142 | inform (UNKNOWN_LOCATION, "%<-fobjc-sjlj-exceptions%> is ignored for %<-fgnu-runtime%>"); | |
143 | flag_objc_sjlj_exceptions = 0; | |
144 | } | |
145 | ||
d4c433f9 NP |
146 | /* TODO: Complain if -fobjc-abi-version=N was used. */ |
147 | ||
148 | /* TODO: Complain if -fobj-nilcheck was used. */ | |
149 | ||
d764a8e6 IS |
150 | rthooks->initialize = gnu_runtime_01_initialize; |
151 | rthooks->default_constant_string_class_name = DEF_CONSTANT_STRING_CLASS_NAME; | |
152 | rthooks->tag_getclass = TAG_GETCLASS; | |
153 | rthooks->super_superclassfield_ident = gnu_runtime_abi_01_super_superclassfield_id; | |
154 | ||
155 | rthooks->class_decl = gnu_runtime_abi_01_class_decl; | |
156 | rthooks->metaclass_decl = gnu_runtime_abi_01_metaclass_decl; | |
157 | rthooks->category_decl = gnu_runtime_abi_01_category_decl; | |
158 | rthooks->protocol_decl = gnu_runtime_abi_01_protocol_decl; | |
159 | rthooks->string_decl = gnu_runtime_abi_01_string_decl; | |
160 | ||
161 | rthooks->get_class_reference = gnu_runtime_abi_01_get_class_reference; | |
162 | rthooks->build_selector_reference = gnu_runtime_abi_01_build_typed_selector_reference; | |
163 | rthooks->get_protocol_reference = gnu_runtime_abi_01_get_protocol_reference; | |
164 | rthooks->build_ivar_reference = gnu_runtime_abi_01_build_ivar_ref; | |
165 | rthooks->get_class_super_ref = gnu_runtime_abi_01_get_class_super_ref; | |
166 | rthooks->get_category_super_ref = gnu_runtime_abi_01_get_category_super_ref; | |
167 | ||
168 | rthooks->receiver_is_class_object = gnu_runtime_abi_01_receiver_is_class_object; | |
169 | rthooks->get_arg_type_list_base = gnu_runtime_abi_01_get_arg_type_list_base; | |
170 | rthooks->build_objc_method_call = gnu_runtime_abi_01_build_objc_method_call; | |
171 | ||
172 | rthooks->setup_const_string_class_decl = | |
173 | gnu_runtime_abi_01_setup_const_string_class_decl; | |
174 | rthooks->build_const_string_constructor = | |
175 | gnu_runtime_abi_01_build_const_string_constructor; | |
176 | ||
177 | rthooks->build_throw_stmt = build_throw_stmt; | |
178 | rthooks->build_exc_ptr = objc_build_exc_ptr; | |
179 | rthooks->begin_catch = begin_catch; | |
180 | rthooks->finish_catch = finish_catch; | |
181 | rthooks->finish_try_stmt = finish_try_stmt; | |
182 | ||
183 | rthooks->generate_metadata = objc_generate_v1_gnu_metadata; | |
184 | return true; | |
185 | } | |
186 | ||
187 | static void build_selector_table_decl (void); | |
188 | static void build_class_template (void); | |
189 | static void build_category_template (void); | |
190 | static void build_protocol_template (void); | |
191 | ||
192 | static GTY(()) tree objc_meta; | |
193 | static GTY(()) tree meta_base; | |
194 | ||
195 | static void gnu_runtime_01_initialize (void) | |
196 | { | |
197 | tree type, ftype, IMP_type; | |
198 | ||
199 | /* We do not need to mark GNU ObjC metadata for different sections, | |
200 | however, we do need to make sure that it is not mistaken for NeXT | |
201 | metadata. */ | |
202 | objc_meta = get_identifier ("OBJC1METG"); | |
203 | meta_base = get_identifier ("NONE"); | |
204 | ||
205 | /* Declare type of selector-objects that represent an operation name. */ | |
206 | /* `const struct objc_selector *' */ | |
207 | type = xref_tag (RECORD_TYPE, get_identifier (TAG_SELECTOR)); | |
208 | type = build_qualified_type (type, TYPE_QUAL_CONST); | |
209 | objc_selector_type = build_pointer_type (type); | |
210 | ||
211 | /* typedef id (*IMP)(id, SEL, ...); */ | |
212 | ftype = build_varargs_function_type_list (objc_object_type, | |
213 | objc_object_type, | |
214 | objc_selector_type, | |
215 | NULL_TREE); | |
216 | ||
217 | IMP_type = build_pointer_type (ftype); | |
218 | ||
219 | build_class_template (); | |
220 | build_super_template (); | |
221 | build_protocol_template (); | |
222 | build_category_template (); | |
223 | ||
224 | /* GNU runtime messenger entry points. */ | |
225 | /* TREE_NOTHROW is cleared for the message-sending functions, | |
226 | because the function that gets called can throw in Obj-C++, or | |
227 | could itself call something that can throw even in Obj-C. */ | |
228 | ||
229 | /* IMP objc_msg_lookup (id, SEL); */ | |
230 | type = build_function_type_list (IMP_type, | |
231 | objc_object_type, | |
232 | objc_selector_type, | |
233 | NULL_TREE); | |
234 | ||
235 | umsg_decl = add_builtin_function (TAG_MSGSEND, | |
236 | type, 0, NOT_BUILT_IN, | |
237 | NULL, NULL_TREE); | |
238 | TREE_NOTHROW (umsg_decl) = 0; | |
239 | ||
240 | /* IMP objc_msg_lookup_super (struct objc_super *, SEL); */ | |
241 | type = build_function_type_list (IMP_type, | |
242 | objc_super_type, | |
243 | objc_selector_type, | |
244 | NULL_TREE); | |
245 | ||
246 | umsg_super_decl = add_builtin_function (TAG_MSGSENDSUPER, | |
247 | type, 0, NOT_BUILT_IN, | |
248 | NULL, NULL_TREE); | |
249 | TREE_NOTHROW (umsg_super_decl) = 0; | |
250 | ||
251 | /* The following GNU runtime entry point is called to initialize | |
252 | each module: | |
253 | ||
254 | __objc_exec_class (void *); */ | |
255 | type = build_function_type_list (void_type_node, | |
256 | ptr_type_node, | |
257 | NULL_TREE); | |
258 | ||
259 | execclass_decl = add_builtin_function (TAG_EXECCLASS, | |
260 | type, 0, NOT_BUILT_IN, | |
261 | NULL, NULL_TREE); | |
262 | ||
263 | type = build_function_type_list (objc_object_type, | |
264 | const_string_type_node, | |
265 | NULL_TREE); | |
266 | ||
267 | /* id objc_getClass (const char *); */ | |
268 | objc_get_class_decl | |
269 | = add_builtin_function (TAG_GETCLASS, type, 0, NOT_BUILT_IN, | |
270 | NULL, NULL_TREE); | |
271 | ||
272 | /* id objc_getMetaClass (const char *); */ | |
944fb799 | 273 | objc_get_meta_class_decl = add_builtin_function (TAG_GETMETACLASS, type, |
d764a8e6 IS |
274 | 0, NOT_BUILT_IN, NULL, |
275 | NULL_TREE); | |
276 | ||
277 | /* static SEL _OBJC_SELECTOR_TABLE[]; */ | |
278 | build_selector_table_decl (); | |
944fb799 MS |
279 | |
280 | /* Stuff for properties. | |
d764a8e6 IS |
281 | The codegen relies on this being NULL for GNU. */ |
282 | objc_copyStruct_decl = NULL_TREE; | |
283 | ||
284 | /* This is the type of all of the following functions | |
285 | bjc_getPropertyStruct() and objc_setPropertyStruct(). */ | |
286 | type = build_function_type_list (void_type_node, | |
287 | ptr_type_node, | |
288 | const_ptr_type_node, | |
944fb799 | 289 | ptrdiff_type_node, |
d764a8e6 IS |
290 | boolean_type_node, |
291 | boolean_type_node, | |
292 | NULL_TREE); | |
293 | ||
294 | /* Declare the following function: | |
295 | void | |
944fb799 | 296 | objc_getPropertyStruct (void *destination, const void *source, |
d764a8e6 IS |
297 | ptrdiff_t size, BOOL is_atomic, BOOL has_strong); */ |
298 | objc_getPropertyStruct_decl = add_builtin_function ("objc_getPropertyStruct", | |
299 | type, 0, NOT_BUILT_IN, | |
300 | NULL, NULL_TREE); | |
301 | TREE_NOTHROW (objc_getPropertyStruct_decl) = 0; | |
302 | /* Declare the following function: | |
303 | void | |
944fb799 | 304 | objc_setPropertyStruct (void *destination, const void *source, |
d764a8e6 IS |
305 | ptrdiff_t size, BOOL is_atomic, BOOL has_strong); */ |
306 | objc_setPropertyStruct_decl = add_builtin_function ("objc_setPropertyStruct", | |
307 | type, 0, NOT_BUILT_IN, | |
308 | NULL, NULL_TREE); | |
309 | TREE_NOTHROW (objc_setPropertyStruct_decl) = 0; | |
944fb799 | 310 | |
d764a8e6 IS |
311 | using_eh_for_cleanups (); |
312 | lang_hooks.eh_runtime_type = objc_eh_runtime_type; | |
313 | lang_hooks.eh_personality = objc_eh_personality; | |
314 | } | |
315 | ||
316 | /* --- templates --- */ | |
317 | /* struct _objc_selector { | |
318 | SEL sel_id; | |
319 | char *sel_type; | |
320 | }; */ | |
321 | ||
322 | static void | |
323 | build_selector_template (void) | |
324 | { | |
325 | tree decls, *chain = NULL; | |
326 | ||
327 | objc_selector_template = objc_start_struct (get_identifier (UTAG_SELECTOR)); | |
328 | ||
329 | /* SEL sel_id; */ | |
330 | decls = add_field_decl (objc_selector_type, "sel_id", &chain); | |
331 | ||
332 | /* char *sel_type; */ | |
333 | add_field_decl (string_type_node, "sel_type", &chain); | |
334 | ||
335 | objc_finish_struct (objc_selector_template, decls); | |
336 | } | |
337 | ||
338 | /* struct _objc_class { | |
339 | struct _objc_class *isa; | |
340 | struct _objc_class *super_class; | |
341 | char *name; | |
342 | long version; | |
343 | long info; | |
344 | long instance_size; | |
345 | struct _objc_ivar_list *ivars; | |
346 | struct _objc_method_list *methods; | |
347 | struct sarray *dtable; | |
348 | struct _objc_class *subclass_list; | |
349 | struct _objc_class *sibling_class; | |
350 | struct _objc_protocol_list *protocols; | |
351 | void *gc_object_type; | |
352 | }; */ | |
353 | ||
354 | static void | |
355 | build_class_template (void) | |
356 | { | |
357 | tree ptype, decls, *chain = NULL; | |
358 | ||
359 | objc_class_template = objc_start_struct (get_identifier (UTAG_CLASS)); | |
360 | ||
361 | /* struct _objc_class *isa; */ | |
362 | decls = add_field_decl (build_pointer_type (objc_class_template), | |
363 | "isa", &chain); | |
364 | ||
365 | /* struct _objc_class *super_class; */ | |
366 | add_field_decl (build_pointer_type (objc_class_template), | |
367 | "super_class", &chain); | |
368 | ||
369 | /* char *name; */ | |
370 | add_field_decl (string_type_node, "name", &chain); | |
371 | ||
372 | /* long version; */ | |
373 | add_field_decl (long_integer_type_node, "version", &chain); | |
374 | ||
375 | /* long info; */ | |
376 | add_field_decl (long_integer_type_node, "info", &chain); | |
377 | ||
378 | /* long instance_size; */ | |
379 | add_field_decl (long_integer_type_node, "instance_size", &chain); | |
380 | ||
381 | /* struct _objc_ivar_list *ivars; */ | |
382 | add_field_decl (objc_ivar_list_ptr,"ivars", &chain); | |
383 | ||
384 | /* struct _objc_method_list *methods; */ | |
385 | add_field_decl (objc_method_list_ptr, "methods", &chain); | |
386 | ||
387 | /* struct sarray *dtable; */ | |
388 | ptype = build_pointer_type(xref_tag (RECORD_TYPE, | |
389 | get_identifier ("sarray"))); | |
390 | add_field_decl (ptype, "dtable", &chain); | |
391 | ||
392 | /* struct objc_class *subclass_list; */ | |
393 | ptype = build_pointer_type (objc_class_template); | |
394 | add_field_decl (ptype, "subclass_list", &chain); | |
395 | ||
396 | /* struct objc_class *sibling_class; */ | |
397 | ptype = build_pointer_type (objc_class_template); | |
398 | add_field_decl (ptype, "sibling_class", &chain); | |
944fb799 | 399 | |
d764a8e6 IS |
400 | /* struct _objc_protocol **protocol_list; */ |
401 | ptype = build_pointer_type (build_pointer_type | |
402 | (xref_tag (RECORD_TYPE, | |
403 | get_identifier (UTAG_PROTOCOL)))); | |
404 | add_field_decl (ptype, "protocol_list", &chain); | |
405 | ||
406 | /* void *gc_object_type; */ | |
407 | add_field_decl (build_pointer_type (void_type_node), | |
408 | "gc_object_type", &chain); | |
409 | ||
410 | objc_finish_struct (objc_class_template, decls); | |
411 | } | |
412 | ||
413 | /* struct _objc_category { | |
414 | char *category_name; | |
415 | char *class_name; | |
416 | struct _objc_method_list *instance_methods; | |
417 | struct _objc_method_list *class_methods; | |
418 | struct _objc_protocol_list *protocols; | |
419 | }; */ | |
420 | ||
421 | static void | |
422 | build_category_template (void) | |
423 | { | |
424 | tree ptype, decls, *chain = NULL; | |
425 | ||
426 | objc_category_template = objc_start_struct (get_identifier (UTAG_CATEGORY)); | |
427 | ||
428 | /* char *category_name; */ | |
429 | decls = add_field_decl (string_type_node, "category_name", &chain); | |
430 | ||
431 | /* char *class_name; */ | |
432 | add_field_decl (string_type_node, "class_name", &chain); | |
433 | ||
434 | /* struct _objc_method_list *instance_methods; */ | |
435 | add_field_decl (objc_method_list_ptr, "instance_methods", &chain); | |
436 | ||
437 | /* struct _objc_method_list *class_methods; */ | |
438 | add_field_decl (objc_method_list_ptr, "class_methods", &chain); | |
439 | ||
440 | /* struct _objc_protocol **protocol_list; */ | |
441 | ptype = build_pointer_type (build_pointer_type (objc_protocol_template)); | |
442 | add_field_decl (ptype, "protocol_list", &chain); | |
443 | ||
444 | objc_finish_struct (objc_category_template, decls); | |
445 | } | |
446 | ||
447 | /* struct _objc_protocol { | |
448 | struct _objc_class *isa; | |
449 | char *protocol_name; | |
450 | struct _objc_protocol **protocol_list; | |
451 | struct _objc__method_prototype_list *instance_methods; | |
452 | struct _objc__method_prototype_list *class_methods; | |
453 | }; */ | |
454 | ||
455 | static void | |
456 | build_protocol_template (void) | |
457 | { | |
458 | tree ptype, decls, *chain = NULL; | |
459 | ||
460 | objc_protocol_template = objc_start_struct (get_identifier (UTAG_PROTOCOL)); | |
461 | ||
462 | /* struct _objc_class *isa; */ | |
463 | ptype = build_pointer_type (xref_tag (RECORD_TYPE, | |
464 | get_identifier (UTAG_CLASS))); | |
465 | decls = add_field_decl (ptype, "isa", &chain); | |
466 | ||
467 | /* char *protocol_name; */ | |
468 | add_field_decl (string_type_node, "protocol_name", &chain); | |
469 | ||
470 | /* struct _objc_protocol **protocol_list; */ | |
471 | ptype = build_pointer_type (build_pointer_type (objc_protocol_template)); | |
472 | add_field_decl (ptype, "protocol_list", &chain); | |
473 | ||
474 | /* struct _objc__method_prototype_list *instance_methods; */ | |
475 | add_field_decl (objc_method_proto_list_ptr, "instance_methods", &chain); | |
476 | ||
477 | /* struct _objc__method_prototype_list *class_methods; */ | |
478 | add_field_decl (objc_method_proto_list_ptr, "class_methods", &chain); | |
479 | ||
480 | objc_finish_struct (objc_protocol_template, decls); | |
481 | } | |
482 | ||
587ae1e3 | 483 | /* --- names, decls + identifiers --- */ |
d764a8e6 IS |
484 | |
485 | static void | |
486 | build_selector_table_decl (void) | |
487 | { | |
488 | tree temp; | |
489 | ||
490 | build_selector_template (); | |
491 | temp = build_array_type (objc_selector_template, NULL_TREE); | |
492 | ||
493 | UOBJC_SELECTOR_TABLE_decl = start_var_decl (temp, "_OBJC_SELECTOR_TABLE"); | |
d7438551 AH |
494 | /* Squash `defined but not used' warning check_global_declaration. */ |
495 | TREE_USED (UOBJC_SELECTOR_TABLE_decl) = 1; | |
d764a8e6 IS |
496 | OBJCMETA (UOBJC_SELECTOR_TABLE_decl, objc_meta, meta_base); |
497 | } | |
498 | ||
499 | ||
500 | static tree | |
501 | gnu_runtime_abi_01_super_superclassfield_id (void) | |
502 | { | |
503 | if (!super_superclassfield_id) | |
504 | super_superclassfield_id = get_identifier ("super_class"); | |
505 | return super_superclassfield_id; | |
506 | } | |
507 | ||
508 | ||
509 | static tree | |
510 | gnu_runtime_abi_01_class_decl (tree klass) | |
511 | { | |
512 | tree decl; | |
513 | char buf[BUFSIZE]; | |
944fb799 | 514 | snprintf (buf, BUFSIZE, "_OBJC_Class_%s", |
d764a8e6 IS |
515 | IDENTIFIER_POINTER (CLASS_NAME (klass))); |
516 | decl = start_var_decl (objc_class_template, buf); | |
517 | OBJCMETA (decl, objc_meta, meta_base); | |
518 | return decl; | |
519 | } | |
520 | ||
521 | static tree | |
522 | gnu_runtime_abi_01_metaclass_decl (tree klass) | |
523 | { | |
524 | tree decl; | |
525 | char buf[BUFSIZE]; | |
944fb799 | 526 | snprintf (buf, BUFSIZE, "_OBJC_MetaClass_%s", |
d764a8e6 IS |
527 | IDENTIFIER_POINTER (CLASS_NAME (klass))); |
528 | decl = start_var_decl (objc_class_template, buf); | |
529 | OBJCMETA (decl, objc_meta, meta_base); | |
530 | return decl; | |
531 | } | |
532 | ||
533 | static tree | |
534 | gnu_runtime_abi_01_category_decl (tree klass) | |
535 | { | |
536 | tree decl; | |
537 | char buf[BUFSIZE]; | |
944fb799 | 538 | snprintf (buf, BUFSIZE, "_OBJC_Category_%s_on_%s", |
d764a8e6 IS |
539 | IDENTIFIER_POINTER (CLASS_SUPER_NAME (klass)), |
540 | IDENTIFIER_POINTER (CLASS_NAME (klass))); | |
541 | decl = start_var_decl (objc_category_template, buf); | |
542 | OBJCMETA (decl, objc_meta, meta_base); | |
543 | return decl; | |
544 | } | |
545 | ||
546 | static tree | |
547 | gnu_runtime_abi_01_protocol_decl (tree p) | |
548 | { | |
549 | tree decl; | |
550 | char buf[BUFSIZE]; | |
551 | ||
552 | /* static struct _objc_protocol _OBJC_Protocol_<mumble>; */ | |
553 | snprintf (buf, BUFSIZE, "_OBJC_Protocol_%s", | |
554 | IDENTIFIER_POINTER (PROTOCOL_NAME (p))); | |
555 | decl = start_var_decl (objc_protocol_template, buf); | |
556 | OBJCMETA (decl, objc_meta, meta_base); | |
557 | return decl; | |
558 | } | |
559 | ||
560 | static tree | |
944fb799 | 561 | gnu_runtime_abi_01_string_decl (tree type, const char *name, |
d764a8e6 IS |
562 | string_section where ATTRIBUTE_UNUSED) |
563 | { | |
564 | tree decl = start_var_decl (type, name); | |
565 | OBJCMETA (decl, objc_meta, meta_base); | |
566 | return decl; | |
567 | } | |
568 | ||
569 | /* --- entry --- */ | |
570 | ||
571 | static tree | |
572 | gnu_runtime_abi_01_get_class_reference (tree ident) | |
573 | { | |
574 | tree params; | |
575 | ||
576 | add_class_reference (ident); | |
577 | ||
944fb799 | 578 | params = build_tree_list (NULL_TREE, my_build_string_pointer |
d764a8e6 IS |
579 | (IDENTIFIER_LENGTH (ident) + 1, |
580 | IDENTIFIER_POINTER (ident))); | |
581 | ||
d764a8e6 IS |
582 | return build_function_call (input_location, objc_get_class_decl, params); |
583 | } | |
584 | ||
6174da1b NF |
585 | /* Used by build_function_type_for_method. Append the types for |
586 | receiver & _cmd at the start of a method argument list to ARGTYPES. | |
587 | CONTEXT is either METHOD_DEF or METHOD_REF, saying whether we are | |
588 | trying to define a method or call one. SUPERFLAG says this is for a | |
589 | send to super. METH may be NULL, in the case that there is no | |
590 | prototype. */ | |
d764a8e6 | 591 | |
6174da1b | 592 | static void |
9771b263 DN |
593 | gnu_runtime_abi_01_get_arg_type_list_base (vec<tree, va_gc> **argtypes, |
594 | tree meth, int context, | |
d764a8e6 IS |
595 | int superflag ATTRIBUTE_UNUSED) |
596 | { | |
6174da1b | 597 | tree receiver_type; |
d764a8e6 | 598 | |
d764a8e6 | 599 | if (context == METHOD_DEF && TREE_CODE (meth) == INSTANCE_METHOD_DECL) |
6174da1b | 600 | receiver_type = objc_instance_type; |
d764a8e6 | 601 | else |
6174da1b | 602 | receiver_type = objc_object_type; |
d764a8e6 | 603 | |
9771b263 | 604 | vec_safe_push (*argtypes, receiver_type); |
d764a8e6 | 605 | /* Selector type - will eventually change to `int'. */ |
9771b263 | 606 | vec_safe_push (*argtypes, objc_selector_type); |
d764a8e6 IS |
607 | } |
608 | ||
609 | /* Unused for GNU runtime. */ | |
610 | static tree | |
611 | gnu_runtime_abi_01_receiver_is_class_object (tree a ATTRIBUTE_UNUSED) | |
612 | { | |
613 | return NULL_TREE; | |
614 | } | |
615 | ||
616 | /* sel_ref_chain is a list whose "value" fields will be instances of | |
617 | identifier_node that represent the selector. LOC is the location of | |
618 | the @selector. */ | |
619 | ||
620 | static tree | |
621 | gnu_runtime_abi_01_build_typed_selector_reference (location_t loc, tree ident, | |
622 | tree prototype) | |
623 | { | |
624 | tree *chain = &sel_ref_chain; | |
625 | tree expr; | |
626 | int index = 0; | |
627 | ||
628 | while (*chain) | |
629 | { | |
944fb799 | 630 | /* When we do a lookup for @selector () we have no idea of the |
d764a8e6 | 631 | prototype - so match the first we find. */ |
944fb799 | 632 | if (TREE_VALUE (*chain) == ident |
d764a8e6 IS |
633 | && (!prototype || TREE_PURPOSE (*chain) == prototype)) |
634 | goto return_at_index; | |
635 | ||
636 | index++; | |
637 | chain = &TREE_CHAIN (*chain); | |
638 | } | |
639 | ||
640 | *chain = tree_cons (prototype, ident, NULL_TREE); | |
641 | ||
944fb799 | 642 | /* TODO: Use a vec and keep this in it to (a) avoid re-creating and |
d764a8e6 IS |
643 | (b) provide better diagnostics for the first time an undefined |
644 | selector is used. */ | |
645 | return_at_index: | |
646 | expr = build_unary_op (loc, ADDR_EXPR, | |
647 | build_array_ref (loc, UOBJC_SELECTOR_TABLE_decl, | |
648 | build_int_cst (NULL_TREE, index)), | |
649 | 1); | |
650 | return convert (objc_selector_type, expr); | |
651 | } | |
652 | ||
653 | /* Build a tree expression to send OBJECT the operation SELECTOR, | |
654 | looking up the method on object LOOKUP_OBJECT (often same as OBJECT), | |
655 | assuming the method has prototype METHOD_PROTOTYPE. | |
656 | (That is an INSTANCE_METHOD_DECL or CLASS_METHOD_DECL.) | |
657 | LOC is the location of the expression to build. | |
658 | Use METHOD_PARAMS as list of args to pass to the method. | |
659 | If SUPER_FLAG is nonzero, we look up the superclass's method. */ | |
660 | ||
661 | static tree | |
662 | build_objc_method_call (location_t loc, int super_flag, tree method_prototype, | |
663 | tree lookup_object, tree selector, | |
664 | tree method_params) | |
665 | { | |
944fb799 | 666 | tree sender = (super_flag ? umsg_super_decl |
d764a8e6 IS |
667 | : (flag_objc_direct_dispatch ? umsg_fast_decl |
668 | : umsg_decl)); | |
669 | tree rcv_p = (super_flag ? objc_super_type : objc_object_type); | |
9771b263 DN |
670 | vec<tree, va_gc> *parms; |
671 | vec<tree, va_gc> *tv; | |
d764a8e6 IS |
672 | unsigned nparm = (method_params ? list_length (method_params) : 0); |
673 | ||
674 | /* If a prototype for the method to be called exists, then cast | |
675 | the sender's return type and arguments to match that of the method. | |
676 | Otherwise, leave sender as is. */ | |
677 | tree ret_type | |
678 | = (method_prototype | |
679 | ? TREE_VALUE (TREE_TYPE (method_prototype)) | |
680 | : objc_object_type); | |
6174da1b NF |
681 | tree ftype |
682 | = build_function_type_for_method (ret_type, method_prototype, | |
683 | METHOD_REF, super_flag); | |
d764a8e6 IS |
684 | tree sender_cast; |
685 | tree method, t; | |
686 | ||
687 | if (method_prototype && METHOD_TYPE_ATTRIBUTES (method_prototype)) | |
944fb799 MS |
688 | ftype = build_type_attribute_variant (ftype, |
689 | METHOD_TYPE_ATTRIBUTES | |
d764a8e6 IS |
690 | (method_prototype)); |
691 | ||
692 | sender_cast = build_pointer_type (ftype); | |
693 | ||
694 | lookup_object = build_c_cast (loc, rcv_p, lookup_object); | |
695 | ||
696 | /* Use SAVE_EXPR to avoid evaluating the receiver twice. */ | |
697 | lookup_object = save_expr (lookup_object); | |
698 | ||
699 | /* Param list + 2 slots for object and selector. */ | |
9771b263 DN |
700 | vec_alloc (parms, nparm + 2); |
701 | vec_alloc (tv, 2); | |
d764a8e6 IS |
702 | |
703 | /* First, call the lookup function to get a pointer to the method, | |
704 | then cast the pointer, then call it with the method arguments. */ | |
9771b263 DN |
705 | tv->quick_push (lookup_object); |
706 | tv->quick_push (selector); | |
81e5eca8 | 707 | method = build_function_call_vec (loc, vNULL, sender, tv, NULL); |
9771b263 | 708 | vec_free (tv); |
d764a8e6 IS |
709 | |
710 | /* Pass the appropriate object to the method. */ | |
9771b263 | 711 | parms->quick_push ((super_flag ? self_decl : lookup_object)); |
d764a8e6 IS |
712 | |
713 | /* Pass the selector to the method. */ | |
9771b263 | 714 | parms->quick_push (selector); |
d764a8e6 IS |
715 | /* Now append the remainder of the parms. */ |
716 | if (nparm) | |
717 | for (; method_params; method_params = TREE_CHAIN (method_params)) | |
9771b263 | 718 | parms->quick_push (TREE_VALUE (method_params)); |
d764a8e6 IS |
719 | |
720 | /* Build an obj_type_ref, with the correct cast for the method call. */ | |
721 | t = build3 (OBJ_TYPE_REF, sender_cast, method, lookup_object, size_zero_node); | |
81e5eca8 | 722 | t = build_function_call_vec (loc, vNULL, t, parms, NULL); |
9771b263 | 723 | vec_free (parms); |
d764a8e6 IS |
724 | return t; |
725 | } | |
726 | ||
727 | static tree | |
728 | gnu_runtime_abi_01_build_objc_method_call (location_t loc, | |
729 | tree method_prototype, | |
730 | tree receiver, | |
731 | tree rtype ATTRIBUTE_UNUSED, | |
732 | tree sel_name, | |
733 | tree method_params, | |
734 | int super ATTRIBUTE_UNUSED) | |
735 | { | |
944fb799 MS |
736 | tree selector = |
737 | gnu_runtime_abi_01_build_typed_selector_reference (loc, | |
738 | sel_name, | |
d764a8e6 IS |
739 | method_prototype); |
740 | ||
741 | return build_objc_method_call (loc, super, method_prototype, receiver, | |
742 | selector, method_params); | |
743 | } | |
744 | ||
745 | static tree | |
746 | gnu_runtime_abi_01_get_protocol_reference (location_t loc, tree p) | |
747 | { | |
748 | tree expr, protocol_struct_type, *chain; | |
749 | if (!PROTOCOL_FORWARD_DECL (p)) | |
750 | PROTOCOL_FORWARD_DECL (p) = gnu_runtime_abi_01_protocol_decl (p); | |
751 | ||
752 | expr = build_unary_op (loc, ADDR_EXPR, PROTOCOL_FORWARD_DECL (p), 0); | |
753 | ||
754 | /* ??? Ideally we'd build the reference with objc_protocol_type directly, | |
755 | if we have it, rather than converting it here. */ | |
756 | expr = convert (objc_protocol_type, expr); | |
757 | ||
758 | /* The @protocol() expression is being compiled into a pointer to a | |
759 | statically allocated instance of the Protocol class. To become | |
760 | usable at runtime, the 'isa' pointer of the instance need to be | |
761 | fixed up at runtime by the runtime library, to point to the | |
762 | actual 'Protocol' class. */ | |
763 | ||
764 | /* For the GNU runtime, put the static Protocol instance in the list | |
765 | of statically allocated instances, so that we make sure that its | |
766 | 'isa' pointer is fixed up at runtime by the GNU runtime library | |
767 | to point to the Protocol class (at runtime, when loading the | |
768 | module, the GNU runtime library loops on the statically allocated | |
769 | instances (as found in the defs field in objc_symtab) and fixups | |
770 | all the 'isa' pointers of those objects). */ | |
771 | ||
772 | /* This type is a struct containing the fields of a Protocol | |
773 | object. (Cfr. objc_protocol_type instead is the type of a pointer | |
774 | to such a struct). */ | |
944fb799 | 775 | protocol_struct_type = xref_tag (RECORD_TYPE, |
d764a8e6 IS |
776 | get_identifier (PROTOCOL_OBJECT_CLASS_NAME)); |
777 | ||
778 | /* Look for the list of Protocol statically allocated instances | |
779 | to fixup at runtime. Create a new list to hold Protocol | |
780 | statically allocated instances, if the list is not found. At | |
781 | present there is only another list, holding NSConstantString | |
782 | static instances to be fixed up at runtime. */ | |
783 | ||
784 | for (chain = &objc_static_instances; | |
785 | *chain && TREE_VALUE (*chain) != protocol_struct_type; | |
786 | chain = &TREE_CHAIN (*chain)); | |
787 | ||
788 | if (!*chain) | |
789 | { | |
790 | *chain = tree_cons (NULL_TREE, protocol_struct_type, NULL_TREE); | |
791 | add_objc_string (OBJC_TYPE_NAME (protocol_struct_type), | |
792 | class_names); | |
793 | } | |
794 | ||
795 | /* Add this statically allocated instance to the Protocol list. */ | |
796 | TREE_PURPOSE (*chain) = tree_cons (NULL_TREE, | |
797 | PROTOCOL_FORWARD_DECL (p), | |
798 | TREE_PURPOSE (*chain)); | |
799 | return expr; | |
800 | } | |
801 | ||
d4c433f9 | 802 | /* For ABI 8 an IVAR is just a fixed offset in the class struct. */ |
d764a8e6 IS |
803 | |
804 | static tree | |
944fb799 | 805 | gnu_runtime_abi_01_build_ivar_ref (location_t loc ATTRIBUTE_UNUSED, |
d764a8e6 IS |
806 | tree base, tree id) |
807 | { | |
808 | return objc_build_component_ref (base, id); | |
809 | } | |
810 | ||
811 | /* We build super class references as we need them (but keep them once | |
812 | built for the sake of efficiency). */ | |
813 | ||
814 | static tree | |
944fb799 | 815 | gnu_runtime_abi_01_get_class_super_ref (location_t loc ATTRIBUTE_UNUSED, |
d764a8e6 IS |
816 | struct imp_entry *imp, bool inst_meth) |
817 | { | |
818 | if (inst_meth) | |
819 | { | |
820 | if (!ucls_super_ref) | |
944fb799 MS |
821 | ucls_super_ref = |
822 | objc_build_component_ref (imp->class_decl, | |
d764a8e6 IS |
823 | get_identifier ("super_class")); |
824 | return ucls_super_ref; | |
825 | } | |
826 | else | |
827 | { | |
828 | if (!uucls_super_ref) | |
944fb799 MS |
829 | uucls_super_ref = |
830 | objc_build_component_ref (imp->meta_decl, | |
d764a8e6 IS |
831 | get_identifier ("super_class")); |
832 | return uucls_super_ref; | |
833 | } | |
834 | } | |
835 | ||
836 | static tree | |
944fb799 | 837 | gnu_runtime_abi_01_get_category_super_ref (location_t loc ATTRIBUTE_UNUSED, |
d764a8e6 IS |
838 | struct imp_entry *imp, bool inst_meth) |
839 | { | |
840 | tree super_name = CLASS_SUPER_NAME (imp->imp_template); | |
841 | tree super_class; | |
842 | ||
843 | add_class_reference (super_name); | |
844 | super_class = (inst_meth ? objc_get_class_decl : objc_get_meta_class_decl); | |
d764a8e6 IS |
845 | super_name = my_build_string_pointer (IDENTIFIER_LENGTH (super_name) + 1, |
846 | IDENTIFIER_POINTER (super_name)); | |
847 | /* super_class = get_{meta_}class("CLASS_SUPER_NAME"); */ | |
848 | return build_function_call (input_location, | |
849 | super_class, | |
850 | build_tree_list (NULL_TREE, super_name)); | |
851 | } | |
852 | ||
853 | static bool | |
854 | gnu_runtime_abi_01_setup_const_string_class_decl (void) | |
855 | { | |
856 | /* Do nothing, and create no error. */ | |
857 | return true; | |
858 | } | |
859 | ||
860 | /* Declare a static instance of CLASS_DECL initialized by CONSTRUCTOR. */ | |
861 | ||
862 | static GTY(()) int num_static_inst; | |
863 | ||
864 | static tree | |
865 | objc_add_static_instance (tree constructor, tree class_decl) | |
866 | { | |
867 | tree *chain, decl; | |
868 | char buf[BUFSIZE]; | |
869 | ||
870 | /* Find the list of static instances for the CLASS_DECL. Create one if | |
871 | not found. */ | |
872 | for (chain = &objc_static_instances; | |
873 | *chain && TREE_VALUE (*chain) != class_decl; | |
874 | chain = &TREE_CHAIN (*chain)); | |
875 | if (!*chain) | |
876 | { | |
877 | *chain = tree_cons (NULL_TREE, class_decl, NULL_TREE); | |
878 | add_objc_string (OBJC_TYPE_NAME (class_decl), class_names); | |
879 | } | |
880 | ||
881 | snprintf (buf, BUFSIZE, "_OBJC_INSTANCE_%d", num_static_inst++); | |
882 | decl = build_decl (input_location, | |
883 | VAR_DECL, get_identifier (buf), class_decl); | |
884 | TREE_STATIC (decl) = 1; | |
885 | DECL_ARTIFICIAL (decl) = 1; | |
886 | TREE_USED (decl) = 1; | |
887 | DECL_INITIAL (decl) = constructor; | |
888 | DECL_CONTEXT (decl) = NULL; | |
889 | OBJCMETA (decl, objc_meta, meta_base); | |
890 | ||
891 | /* We may be writing something else just now. | |
944fb799 | 892 | Postpone till end of input. */ |
d764a8e6 | 893 | DECL_DEFER_OUTPUT (decl) = 1; |
641da50a | 894 | lang_hooks.decls.pushdecl (decl); |
d764a8e6 IS |
895 | rest_of_decl_compilation (decl, 1, 0); |
896 | ||
897 | /* Add the DECL to the head of this CLASS' list. */ | |
898 | TREE_PURPOSE (*chain) = tree_cons (NULL_TREE, decl, TREE_PURPOSE (*chain)); | |
899 | ||
900 | return decl; | |
901 | } | |
902 | ||
903 | static tree | |
904 | gnu_runtime_abi_01_build_const_string_constructor (location_t loc, tree string, | |
905 | int length) | |
906 | { | |
907 | tree constructor, fields; | |
9771b263 | 908 | vec<constructor_elt, va_gc> *v = NULL; |
944fb799 | 909 | |
d764a8e6 IS |
910 | /* GNU: (NXConstantString *) & ((__builtin_ObjCString) { NULL, string, length }) */ |
911 | fields = TYPE_FIELDS (internal_const_str_type); | |
912 | CONSTRUCTOR_APPEND_ELT (v, fields, build_int_cst (NULL_TREE, 0)); | |
913 | ||
914 | fields = DECL_CHAIN (fields); | |
944fb799 | 915 | CONSTRUCTOR_APPEND_ELT (v, fields, build_unary_op (loc, |
d764a8e6 IS |
916 | ADDR_EXPR, string, 1)); |
917 | ||
918 | fields = DECL_CHAIN (fields); | |
919 | CONSTRUCTOR_APPEND_ELT (v, fields, build_int_cst (NULL_TREE, length)); | |
920 | constructor = objc_build_constructor (internal_const_str_type, v); | |
921 | ||
922 | constructor = objc_add_static_instance (constructor, constant_string_type); | |
923 | return constructor; | |
924 | } | |
925 | ||
926 | /* --- metadata - module initializer --- */ | |
927 | ||
928 | /* The GNU runtime requires us to provide a static initializer function | |
929 | for each module: | |
930 | ||
931 | static void __objc_gnu_init (void) { | |
932 | __objc_exec_class (&L_OBJC_MODULES); | |
933 | } */ | |
934 | ||
935 | ||
936 | static void | |
937 | build_module_initializer_routine (void) | |
938 | { | |
939 | tree body; | |
940 | ||
941 | #ifdef OBJCPLUS | |
942 | push_lang_context (lang_name_c); /* extern "C" */ | |
943 | #endif | |
944 | ||
945 | objc_push_parm (build_decl (input_location, | |
946 | PARM_DECL, NULL_TREE, void_type_node)); | |
947 | #ifdef OBJCPLUS | |
948 | objc_start_function (get_identifier (TAG_GNUINIT), | |
949 | build_function_type_list (void_type_node, NULL_TREE), | |
950 | NULL_TREE, NULL_TREE); | |
951 | #else | |
952 | objc_start_function (get_identifier (TAG_GNUINIT), | |
953 | build_function_type_list (void_type_node, NULL_TREE), | |
a04a722b | 954 | NULL_TREE, objc_get_parm_info (0, NULL_TREE)); |
d764a8e6 IS |
955 | #endif |
956 | body = c_begin_compound_stmt (true); | |
957 | add_stmt (build_function_call | |
958 | (input_location, | |
959 | execclass_decl, | |
960 | build_tree_list | |
961 | (NULL_TREE, | |
962 | build_unary_op (input_location, ADDR_EXPR, | |
963 | UOBJC_MODULES_decl, 0)))); | |
964 | add_stmt (c_end_compound_stmt (input_location, body, true)); | |
965 | ||
966 | TREE_PUBLIC (current_function_decl) = 0; | |
967 | ||
968 | #ifndef OBJCPLUS | |
969 | /* For Objective-C++, we will need to call __objc_gnu_init | |
970 | from objc_generate_static_init_call() below. */ | |
971 | DECL_STATIC_CONSTRUCTOR (current_function_decl) = 1; | |
972 | #endif | |
973 | ||
974 | GNU_INIT_decl = current_function_decl; | |
975 | finish_function (); | |
976 | ||
977 | #ifdef OBJCPLUS | |
978 | pop_lang_context (); | |
979 | #endif | |
980 | } | |
981 | ||
982 | #ifdef OBJCPLUS | |
983 | /* Return 1 if the __objc_gnu_init function has been synthesized and needs | |
984 | to be called by the module initializer routine. */ | |
985 | ||
986 | int | |
987 | objc_static_init_needed_p (void) | |
988 | { | |
989 | return (GNU_INIT_decl != NULL_TREE); | |
990 | } | |
991 | ||
992 | /* Generate a call to the __objc_gnu_init initializer function. */ | |
993 | ||
994 | tree | |
995 | objc_generate_static_init_call (tree ctors ATTRIBUTE_UNUSED) | |
996 | { | |
997 | add_stmt (build_stmt (input_location, EXPR_STMT, | |
998 | build_function_call (input_location, | |
999 | GNU_INIT_decl, NULL_TREE))); | |
1000 | ||
1001 | return ctors; | |
1002 | } | |
1003 | #endif /* OBJCPLUS */ | |
1004 | ||
1005 | /* --- Output GNU Meta-data --- */ | |
1006 | ||
1007 | static void | |
1008 | generate_classref_translation_entry (tree chain) | |
1009 | { | |
1010 | tree expr, decl, type; | |
1011 | ||
1012 | decl = TREE_PURPOSE (chain); | |
1013 | type = TREE_TYPE (decl); | |
1014 | ||
1015 | expr = add_objc_string (TREE_VALUE (chain), class_names); | |
1016 | expr = convert (type, expr); /* cast! */ | |
1017 | ||
1018 | /* This is a class reference. It is re-written by the runtime, | |
1019 | but will be optimized away unless we force it. */ | |
1020 | DECL_PRESERVE_P (decl) = 1; | |
1021 | OBJCMETA (decl, objc_meta, meta_base); | |
1022 | finish_var_decl (decl, expr); | |
1023 | return; | |
1024 | } | |
1025 | ||
1026 | ||
1027 | static void | |
1028 | handle_impent (struct imp_entry *impent) | |
1029 | { | |
1030 | char *string; | |
1031 | ||
1032 | /* objc_implementation_context = impent->imp_context; | |
1033 | implementation_template = impent->imp_template;*/ | |
1034 | ||
1035 | switch (TREE_CODE (impent->imp_context)) | |
1036 | { | |
1037 | case CLASS_IMPLEMENTATION_TYPE: | |
1038 | { | |
1039 | const char *const class_name = | |
1040 | IDENTIFIER_POINTER (CLASS_NAME (impent->imp_context)); | |
944fb799 | 1041 | |
d764a8e6 | 1042 | string = (char *) alloca (strlen (class_name) + 30); |
944fb799 | 1043 | |
d764a8e6 IS |
1044 | sprintf (string, "__objc_class_name_%s", class_name); |
1045 | break; | |
1046 | } | |
1047 | case CATEGORY_IMPLEMENTATION_TYPE: | |
1048 | { | |
1049 | const char *const class_name = | |
1050 | IDENTIFIER_POINTER (CLASS_NAME (impent->imp_context)); | |
1051 | const char *const class_super_name = | |
1052 | IDENTIFIER_POINTER (CLASS_SUPER_NAME (impent->imp_context)); | |
944fb799 | 1053 | |
d764a8e6 IS |
1054 | string = (char *) alloca (strlen (class_name) |
1055 | + strlen (class_super_name) + 30); | |
944fb799 | 1056 | |
d764a8e6 IS |
1057 | /* Do the same for categories. Even though no references to |
1058 | these symbols are generated automatically by the compiler, | |
1059 | it gives you a handle to pull them into an archive by | |
1060 | hand. */ | |
1061 | sprintf (string, "*__objc_category_name_%s_%s", class_name, class_super_name); | |
1062 | break; | |
1063 | } | |
1064 | default: | |
1065 | return; | |
1066 | } | |
1067 | ||
1068 | { | |
1069 | tree decl, init; | |
1070 | ||
1071 | init = integer_zero_node; | |
1072 | decl = build_decl (input_location, | |
1073 | VAR_DECL, get_identifier (string), TREE_TYPE (init)); | |
1074 | TREE_PUBLIC (decl) = 1; | |
1075 | TREE_READONLY (decl) = 1; | |
1076 | TREE_USED (decl) = 1; | |
1077 | TREE_CONSTANT (decl) = 1; | |
1078 | DECL_CONTEXT (decl) = NULL_TREE; | |
1079 | DECL_ARTIFICIAL (decl) = 1; | |
1080 | TREE_STATIC (decl) = 1; | |
1081 | DECL_INITIAL (decl) = error_mark_node; /* A real initializer is coming... */ | |
1082 | /* We must force the reference. */ | |
1083 | DECL_PRESERVE_P (decl) = 1; | |
1084 | ||
1085 | finish_var_decl(decl, init) ; | |
1086 | } | |
1087 | } | |
1088 | ||
1089 | tree | |
1090 | build_protocol_initializer (tree type, tree protocol_name, tree protocol_list, | |
1091 | tree inst_methods, tree class_methods) | |
1092 | { | |
1093 | tree expr, ttyp; | |
1094 | location_t loc; | |
9771b263 | 1095 | vec<constructor_elt, va_gc> *inits = NULL; |
d764a8e6 IS |
1096 | |
1097 | /* TODO: pass the loc in or find it from args. */ | |
1098 | loc = input_location; | |
944fb799 | 1099 | ttyp = build_pointer_type (xref_tag (RECORD_TYPE, |
d764a8e6 IS |
1100 | get_identifier (UTAG_CLASS))); |
1101 | /* Filling the "isa" in with a version allows the runtime system to | |
1102 | detect this ... */ | |
1103 | expr = build_int_cst (ttyp, PROTOCOL_VERSION); | |
1104 | ||
1105 | CONSTRUCTOR_APPEND_ELT (inits, NULL_TREE, expr); | |
1106 | ||
1107 | CONSTRUCTOR_APPEND_ELT (inits, NULL_TREE, protocol_name); | |
1108 | CONSTRUCTOR_APPEND_ELT (inits, NULL_TREE, protocol_list); | |
1109 | ||
1110 | ttyp = objc_method_proto_list_ptr; | |
1111 | if (inst_methods) | |
1112 | expr = convert (ttyp, build_unary_op (loc, ADDR_EXPR, inst_methods, 0)); | |
1113 | else | |
1114 | expr = convert (ttyp, null_pointer_node); | |
1115 | CONSTRUCTOR_APPEND_ELT (inits, NULL_TREE, expr); | |
1116 | ||
1117 | if (class_methods) | |
1118 | expr = convert (ttyp, build_unary_op (loc, ADDR_EXPR, class_methods, 0)); | |
1119 | else | |
1120 | expr = convert (ttyp, null_pointer_node); | |
1121 | CONSTRUCTOR_APPEND_ELT (inits, NULL_TREE, expr); | |
1122 | ||
1123 | return objc_build_constructor (type, inits); | |
1124 | } | |
1125 | ||
1126 | static tree | |
1127 | generate_protocol_list (tree i_or_p, tree klass_ctxt) | |
1128 | { | |
1129 | tree array_type, ptype, refs_decl, lproto, e, plist; | |
9771b263 | 1130 | vec<constructor_elt, va_gc> *v = NULL; |
d764a8e6 IS |
1131 | char buf[BUFSIZE]; |
1132 | int size = 0; | |
1133 | ||
1134 | switch (TREE_CODE (i_or_p)) | |
1135 | { | |
1136 | case CLASS_INTERFACE_TYPE: | |
1137 | case CATEGORY_INTERFACE_TYPE: | |
1138 | plist = CLASS_PROTOCOL_LIST (i_or_p); | |
1139 | break; | |
1140 | case PROTOCOL_INTERFACE_TYPE: | |
1141 | plist = PROTOCOL_LIST (i_or_p); | |
1142 | break; | |
1143 | default: | |
1144 | gcc_unreachable (); | |
1145 | } | |
1146 | ||
1147 | /* Compute size. */ | |
1148 | for (lproto = plist; lproto; lproto = TREE_CHAIN (lproto)) | |
1149 | if (TREE_CODE (TREE_VALUE (lproto)) == PROTOCOL_INTERFACE_TYPE | |
1150 | && PROTOCOL_FORWARD_DECL (TREE_VALUE (lproto))) | |
1151 | size++; | |
1152 | ||
1153 | /* Build initializer. */ | |
1154 | CONSTRUCTOR_APPEND_ELT (v, NULL_TREE, build_int_cst (NULL_TREE, 0)); | |
1155 | e = build_int_cst (build_pointer_type (objc_protocol_template), size); | |
1156 | CONSTRUCTOR_APPEND_ELT (v, NULL_TREE, e); | |
1157 | ||
1158 | for (lproto = plist; lproto; lproto = TREE_CHAIN (lproto)) | |
1159 | { | |
1160 | tree pval = TREE_VALUE (lproto); | |
1161 | ||
1162 | if (TREE_CODE (pval) == PROTOCOL_INTERFACE_TYPE | |
1163 | && PROTOCOL_FORWARD_DECL (pval)) | |
1164 | { | |
1165 | tree fwref = PROTOCOL_FORWARD_DECL (pval); | |
1166 | location_t loc = DECL_SOURCE_LOCATION (fwref) ; | |
1167 | e = build_unary_op (loc, ADDR_EXPR, fwref, 0); | |
1168 | CONSTRUCTOR_APPEND_ELT (v, NULL_TREE, e); | |
1169 | } | |
1170 | } | |
1171 | ||
1172 | /* static struct objc_protocol *refs[n]; */ | |
1173 | ||
1174 | switch (TREE_CODE (i_or_p)) | |
1175 | { | |
1176 | case PROTOCOL_INTERFACE_TYPE: | |
944fb799 | 1177 | snprintf (buf, BUFSIZE, "_OBJC_ProtocolRefs_%s", |
d764a8e6 IS |
1178 | IDENTIFIER_POINTER (PROTOCOL_NAME (i_or_p))); |
1179 | break; | |
1180 | case CLASS_INTERFACE_TYPE: | |
944fb799 | 1181 | snprintf (buf, BUFSIZE, "_OBJC_ClassProtocols_%s", |
d764a8e6 IS |
1182 | IDENTIFIER_POINTER (CLASS_NAME (i_or_p))); |
1183 | break; | |
1184 | case CATEGORY_INTERFACE_TYPE: | |
944fb799 | 1185 | snprintf (buf, BUFSIZE, "_OBJC_CategoryProtocols_%s_%s", |
d764a8e6 IS |
1186 | IDENTIFIER_POINTER (CLASS_NAME (klass_ctxt)), |
1187 | IDENTIFIER_POINTER (CLASS_SUPER_NAME (klass_ctxt))); | |
1188 | break; | |
1189 | default: | |
1190 | gcc_unreachable (); | |
1191 | } | |
1192 | ||
1193 | ptype = build_pointer_type (objc_protocol_template); | |
1194 | array_type = build_sized_array_type (ptype, size + 3); | |
1195 | refs_decl = start_var_decl (array_type, buf); | |
1196 | OBJCMETA (refs_decl, objc_meta, meta_base); | |
1197 | finish_var_decl (refs_decl, | |
1198 | objc_build_constructor (TREE_TYPE (refs_decl), v)); | |
1199 | ||
1200 | return refs_decl; | |
1201 | } | |
1202 | ||
944fb799 | 1203 | static tree |
d764a8e6 IS |
1204 | generate_v1_meth_descriptor_table (tree chain, tree protocol, const char *prefix) |
1205 | { | |
1206 | tree method_list_template, initlist, decl; | |
1207 | int size; | |
9771b263 | 1208 | vec<constructor_elt, va_gc> *v = NULL; |
d764a8e6 IS |
1209 | char buf[BUFSIZE]; |
1210 | ||
1211 | if (!chain || !prefix) | |
1212 | return NULL_TREE; | |
1213 | ||
1214 | if (!objc_method_prototype_template) | |
1215 | objc_method_prototype_template = build_method_prototype_template (); | |
944fb799 | 1216 | |
d764a8e6 | 1217 | size = list_length (chain); |
944fb799 | 1218 | method_list_template = |
d764a8e6 IS |
1219 | build_method_prototype_list_template (objc_method_prototype_template, |
1220 | size); | |
944fb799 | 1221 | snprintf (buf, BUFSIZE, "%s_%s", prefix, |
d764a8e6 IS |
1222 | IDENTIFIER_POINTER (PROTOCOL_NAME (protocol))); |
1223 | ||
1224 | decl = start_var_decl (method_list_template, buf); | |
1225 | ||
1226 | CONSTRUCTOR_APPEND_ELT (v, NULL_TREE, build_int_cst (NULL_TREE, size)); | |
944fb799 | 1227 | initlist = |
d764a8e6 IS |
1228 | build_descriptor_table_initializer (objc_method_prototype_template, |
1229 | chain); | |
1230 | CONSTRUCTOR_APPEND_ELT (v, NULL_TREE, initlist); | |
1231 | OBJCMETA (decl, objc_meta, meta_base); | |
1232 | finish_var_decl (decl, objc_build_constructor (method_list_template, v)); | |
1233 | return decl; | |
1234 | } | |
1235 | ||
1236 | /* For each protocol which was referenced either from a @protocol() | |
1237 | expression, or because a class/category implements it (then a | |
1238 | pointer to the protocol is stored in the struct describing the | |
1239 | class/category), we create a statically allocated instance of the | |
1240 | Protocol class. The code is written in such a way as to generate | |
1241 | as few Protocol objects as possible; we generate a unique Protocol | |
1242 | instance for each protocol, and we don't generate a Protocol | |
1243 | instance if the protocol is never referenced (either from a | |
1244 | @protocol() or from a class/category implementation). These | |
1245 | statically allocated objects can be referred to via the static | |
1246 | (that is, private to this module) symbols _OBJC_PROTOCOL_n. | |
1247 | ||
1248 | The statically allocated Protocol objects that we generate here | |
1249 | need to be fixed up at runtime in order to be used: the 'isa' | |
1250 | pointer of the objects need to be set up to point to the 'Protocol' | |
1251 | class, as known at runtime. | |
1252 | ||
1253 | The GNU runtime fixes up all protocols before user code from the module | |
1254 | is executed; it requires pointers to those symbols | |
1255 | to be put in the objc_symtab (which is then passed as argument to | |
1256 | the function __objc_exec_class() which the compiler sets up to be | |
1257 | executed automatically when the module is loaded); setup of those | |
1258 | Protocol objects happen in two ways in the GNU runtime: all | |
1259 | Protocol objects referred to by a class or category implementation | |
1260 | are fixed up when the class/category is loaded; all Protocol | |
1261 | objects referred to by a @protocol() expression are added by the | |
1262 | compiler to the list of statically allocated instances to fixup | |
1263 | (the same list holding the statically allocated constant string | |
1264 | objects). Because, as explained above, the compiler generates as | |
1265 | few Protocol objects as possible, some Protocol object might end up | |
1266 | being referenced multiple times when compiled with the GNU runtime, | |
1267 | and end up being fixed up multiple times at runtime initialization. | |
1268 | But that doesn't hurt, it's just a little inefficient. */ | |
1269 | ||
1270 | static void | |
1271 | generate_protocols (void) | |
1272 | { | |
1273 | tree p, encoding; | |
1274 | tree decl; | |
1275 | tree initlist, protocol_name_expr, refs_decl, refs_expr; | |
1276 | ||
1277 | /* If a protocol was directly referenced, pull in indirect references. */ | |
1278 | for (p = protocol_chain; p; p = TREE_CHAIN (p)) | |
1279 | if (PROTOCOL_FORWARD_DECL (p) && PROTOCOL_LIST (p)) | |
1280 | generate_protocol_references (PROTOCOL_LIST (p)); | |
1281 | ||
1282 | for (p = protocol_chain; p; p = TREE_CHAIN (p)) | |
1283 | { | |
1284 | tree nst_methods = PROTOCOL_NST_METHODS (p); | |
1285 | tree cls_methods = PROTOCOL_CLS_METHODS (p); | |
1286 | ||
1287 | /* If protocol wasn't referenced, don't generate any code. */ | |
1288 | decl = PROTOCOL_FORWARD_DECL (p); | |
1289 | ||
1290 | if (!decl) | |
1291 | continue; | |
1292 | ||
1293 | /* Make sure we link in the Protocol class. */ | |
1294 | add_class_reference (get_identifier (PROTOCOL_OBJECT_CLASS_NAME)); | |
1295 | ||
1296 | while (nst_methods) | |
1297 | { | |
1298 | if (! METHOD_ENCODING (nst_methods)) | |
1299 | { | |
1300 | encoding = encode_method_prototype (nst_methods); | |
1301 | METHOD_ENCODING (nst_methods) = encoding; | |
1302 | } | |
1303 | nst_methods = DECL_CHAIN (nst_methods); | |
1304 | } | |
1305 | ||
944fb799 | 1306 | UOBJC_INSTANCE_METHODS_decl = |
d764a8e6 IS |
1307 | generate_v1_meth_descriptor_table (PROTOCOL_NST_METHODS (p), p, |
1308 | "_OBJC_PROTOCOL_INSTANCE_METHODS"); | |
1309 | ||
1310 | while (cls_methods) | |
1311 | { | |
1312 | if (! METHOD_ENCODING (cls_methods)) | |
1313 | { | |
1314 | encoding = encode_method_prototype (cls_methods); | |
1315 | METHOD_ENCODING (cls_methods) = encoding; | |
1316 | } | |
1317 | ||
1318 | cls_methods = DECL_CHAIN (cls_methods); | |
1319 | } | |
1320 | ||
944fb799 | 1321 | UOBJC_CLASS_METHODS_decl = |
d764a8e6 IS |
1322 | generate_v1_meth_descriptor_table (PROTOCOL_CLS_METHODS (p), p, |
1323 | "_OBJC_PROTOCOL_CLASS_METHODS"); | |
1324 | /* generate_method_descriptors (p);*/ | |
1325 | ||
1326 | if (PROTOCOL_LIST (p)) | |
1327 | refs_decl = generate_protocol_list (p, NULL_TREE); | |
1328 | else | |
1329 | refs_decl = 0; | |
1330 | ||
1331 | /* static struct objc_protocol _OBJC_PROTOCOL_<mumble>; */ | |
1332 | protocol_name_expr = add_objc_string (PROTOCOL_NAME (p), class_names); | |
1333 | ||
1334 | if (refs_decl) | |
1335 | refs_expr = convert (build_pointer_type (build_pointer_type | |
1336 | (objc_protocol_template)), | |
1337 | build_unary_op (input_location, | |
1338 | ADDR_EXPR, refs_decl, 0)); | |
1339 | else | |
1340 | refs_expr = build_int_cst (NULL_TREE, 0); | |
1341 | ||
1342 | /* UOBJC_INSTANCE_METHODS_decl/UOBJC_CLASS_METHODS_decl are set | |
1343 | by generate_method_descriptors, which is called above. */ | |
1344 | initlist = build_protocol_initializer (TREE_TYPE (decl), | |
1345 | protocol_name_expr, refs_expr, | |
1346 | UOBJC_INSTANCE_METHODS_decl, | |
1347 | UOBJC_CLASS_METHODS_decl); | |
1348 | finish_var_decl (decl, initlist); | |
1349 | } | |
1350 | } | |
1351 | ||
1352 | static tree | |
1353 | generate_dispatch_table (tree chain, const char *name) | |
1354 | { | |
1355 | tree decl, method_list_template, initlist; | |
9771b263 | 1356 | vec<constructor_elt, va_gc> *v = NULL; |
d764a8e6 IS |
1357 | int size = list_length (chain); |
1358 | ||
1359 | if (!objc_method_template) | |
1360 | objc_method_template = build_method_template (); | |
1361 | ||
1362 | method_list_template = build_method_list_template (objc_method_template, | |
1363 | size); | |
1364 | initlist = build_dispatch_table_initializer (objc_method_template, chain); | |
1365 | ||
1366 | decl = start_var_decl (method_list_template, name); | |
1367 | ||
1368 | CONSTRUCTOR_APPEND_ELT (v, NULL_TREE, integer_zero_node); | |
944fb799 | 1369 | CONSTRUCTOR_APPEND_ELT (v, NULL_TREE, |
d764a8e6 IS |
1370 | build_int_cst (integer_type_node, size)); |
1371 | CONSTRUCTOR_APPEND_ELT (v, NULL_TREE, initlist); | |
1372 | ||
1373 | OBJCMETA (decl, objc_meta, meta_base); | |
1374 | finish_var_decl (decl, | |
1375 | objc_build_constructor (TREE_TYPE (decl), v)); | |
1376 | ||
1377 | return decl; | |
1378 | } | |
1379 | ||
1380 | /* Init a category. */ | |
1381 | static tree | |
1382 | build_category_initializer (tree type, tree cat_name, tree class_name, | |
1383 | tree inst_methods, tree class_methods, | |
1384 | tree protocol_list) | |
1385 | { | |
1386 | tree expr, ltyp; | |
1387 | location_t loc; | |
9771b263 | 1388 | vec<constructor_elt, va_gc> *v = NULL; |
d764a8e6 IS |
1389 | |
1390 | /* TODO: pass the loc in or find it from args. */ | |
1391 | /* TODO: pass the loc in or find it from args. */ | |
1392 | loc = UNKNOWN_LOCATION; | |
1393 | CONSTRUCTOR_APPEND_ELT (v, NULL_TREE, cat_name); | |
1394 | CONSTRUCTOR_APPEND_ELT (v, NULL_TREE, class_name); | |
1395 | ||
1396 | ltyp = objc_method_list_ptr; | |
1397 | if (inst_methods) | |
1398 | expr = convert (ltyp, build_unary_op (loc, ADDR_EXPR, inst_methods, 0)); | |
1399 | else | |
1400 | expr = convert (ltyp, null_pointer_node); | |
1401 | CONSTRUCTOR_APPEND_ELT (v, NULL_TREE, expr); | |
1402 | ||
1403 | if (class_methods) | |
1404 | expr = convert (ltyp, build_unary_op (loc, ADDR_EXPR, class_methods, 0)); | |
1405 | else | |
1406 | expr = convert (ltyp, null_pointer_node); | |
1407 | CONSTRUCTOR_APPEND_ELT (v, NULL_TREE, expr); | |
1408 | ||
1409 | /* protocol_list = */ | |
1410 | ltyp = build_pointer_type (build_pointer_type (objc_protocol_template)); | |
1411 | if (protocol_list) | |
1412 | expr = convert (ltyp, build_unary_op (loc, ADDR_EXPR, protocol_list, 0)); | |
1413 | else | |
1414 | expr = convert (ltyp, null_pointer_node); | |
1415 | CONSTRUCTOR_APPEND_ELT (v, NULL_TREE, expr); | |
1416 | ||
1417 | return objc_build_constructor (type, v); | |
1418 | } | |
1419 | ||
1420 | /* static struct objc_category _OBJC_CATEGORY_<name> = { ... }; */ | |
1421 | ||
1422 | static void | |
1423 | generate_category (struct imp_entry *impent) | |
1424 | { | |
1425 | tree initlist, cat_name_expr, class_name_expr; | |
1426 | tree protocol_decl, category, cat_decl; | |
1427 | tree inst_methods = NULL_TREE, class_methods = NULL_TREE; | |
1428 | tree cat = impent->imp_context; | |
1429 | char buf[BUFSIZE]; | |
1430 | ||
1431 | cat_decl = impent->class_decl; | |
1432 | ||
1433 | add_class_reference (CLASS_NAME (cat)); | |
1434 | cat_name_expr = add_objc_string (CLASS_SUPER_NAME (cat), class_names); | |
1435 | ||
1436 | class_name_expr = add_objc_string (CLASS_NAME (cat), class_names); | |
1437 | ||
1438 | category = lookup_category (impent->imp_template, CLASS_SUPER_NAME (cat)); | |
1439 | ||
1440 | if (category && CLASS_PROTOCOL_LIST (category)) | |
1441 | { | |
1442 | generate_protocol_references (CLASS_PROTOCOL_LIST (category)); | |
1443 | protocol_decl = generate_protocol_list (category, cat); | |
1444 | } | |
1445 | else | |
1446 | protocol_decl = 0; | |
1447 | ||
1448 | if (CLASS_NST_METHODS (cat)) | |
1449 | { | |
1450 | snprintf (buf, BUFSIZE, "_OBJC_CategoryInstanceMethods_%s_%s", | |
1451 | IDENTIFIER_POINTER (CLASS_NAME (cat)), | |
1452 | IDENTIFIER_POINTER (CLASS_SUPER_NAME (cat))); | |
1453 | inst_methods = generate_dispatch_table (CLASS_NST_METHODS (cat), buf); | |
1454 | } | |
1455 | ||
1456 | if (CLASS_CLS_METHODS (cat)) | |
1457 | { | |
1458 | snprintf (buf, BUFSIZE, "_OBJC_CategoryClassMethods_%s_%s", | |
1459 | IDENTIFIER_POINTER (CLASS_NAME (cat)), | |
1460 | IDENTIFIER_POINTER (CLASS_SUPER_NAME (cat))); | |
1461 | class_methods = generate_dispatch_table (CLASS_CLS_METHODS (cat), buf); | |
1462 | } | |
1463 | ||
1464 | initlist = build_category_initializer (TREE_TYPE (cat_decl), | |
1465 | cat_name_expr, class_name_expr, | |
1466 | inst_methods, class_methods, | |
1467 | protocol_decl); | |
1468 | /* Finish and initialize the forward decl. */ | |
1469 | finish_var_decl (cat_decl, initlist); | |
1470 | impent->class_decl = cat_decl; | |
1471 | } | |
1472 | ||
1473 | /* struct _objc_class { | |
1474 | struct objc_class *isa; | |
1475 | struct objc_class *super_class; | |
1476 | char *name; | |
1477 | long version; | |
1478 | long info; | |
1479 | long instance_size; | |
1480 | struct objc_ivar_list *ivars; | |
1481 | struct objc_method_list *methods; | |
d4c433f9 NP |
1482 | struct sarray *dtable; |
1483 | struct objc_class *subclass_list; | |
1484 | struct objc_class *sibling_class; | |
d764a8e6 | 1485 | struct objc_protocol_list *protocols; |
d764a8e6 IS |
1486 | void *gc_object_type; |
1487 | }; */ | |
1488 | ||
1489 | static tree | |
1490 | build_shared_structure_initializer (tree type, tree isa, tree super, | |
1491 | tree name, tree size, int status, | |
1492 | tree dispatch_table, tree ivar_list, | |
1493 | tree protocol_list) | |
1494 | { | |
1495 | tree expr, ltyp; | |
9771b263 | 1496 | vec<constructor_elt, va_gc> *v = NULL; |
d764a8e6 IS |
1497 | |
1498 | /* isa = */ | |
1499 | CONSTRUCTOR_APPEND_ELT (v, NULL_TREE, isa); | |
1500 | ||
1501 | /* super_class = */ | |
1502 | CONSTRUCTOR_APPEND_ELT (v, NULL_TREE, super); | |
1503 | ||
1504 | /* name = */ | |
1505 | CONSTRUCTOR_APPEND_ELT (v, NULL_TREE, default_conversion (name)); | |
1506 | ||
1507 | /* version = */ | |
1508 | CONSTRUCTOR_APPEND_ELT (v, NULL_TREE, | |
1509 | build_int_cst (long_integer_type_node, 0)); | |
1510 | ||
1511 | /* info = */ | |
1512 | CONSTRUCTOR_APPEND_ELT (v, NULL_TREE, | |
1513 | build_int_cst (long_integer_type_node, status)); | |
1514 | ||
1515 | /* instance_size = */ | |
1516 | CONSTRUCTOR_APPEND_ELT (v, NULL_TREE, | |
1517 | convert (long_integer_type_node, size)); | |
1518 | ||
1519 | /* objc_ivar_list = */ | |
1520 | if (!ivar_list) | |
944fb799 | 1521 | CONSTRUCTOR_APPEND_ELT (v, NULL_TREE, |
d764a8e6 IS |
1522 | build_int_cst (objc_ivar_list_ptr, 0)); |
1523 | else | |
1524 | { | |
1525 | expr = convert (objc_ivar_list_ptr, | |
944fb799 | 1526 | build_unary_op (input_location, ADDR_EXPR, |
d764a8e6 IS |
1527 | ivar_list, 0)); |
1528 | CONSTRUCTOR_APPEND_ELT (v, NULL_TREE, expr); | |
1529 | } | |
1530 | ||
1531 | /* objc_method_list = */ | |
1532 | if (!dispatch_table) | |
944fb799 | 1533 | CONSTRUCTOR_APPEND_ELT (v, NULL_TREE, |
d764a8e6 IS |
1534 | convert (objc_method_list_ptr, null_pointer_node)); |
1535 | else | |
1536 | { | |
1537 | expr = convert (objc_method_list_ptr, | |
944fb799 | 1538 | build_unary_op (input_location, ADDR_EXPR, |
d764a8e6 IS |
1539 | dispatch_table, 0)); |
1540 | CONSTRUCTOR_APPEND_ELT (v, NULL_TREE, expr); | |
1541 | } | |
1542 | ||
d4c433f9 | 1543 | /* FIXME: Remove NeXT runtime code. */ |
d764a8e6 IS |
1544 | if (flag_next_runtime) |
1545 | { | |
1546 | ltyp = build_pointer_type (xref_tag (RECORD_TYPE, | |
1547 | get_identifier ("objc_cache"))); | |
1548 | /* method_cache = */ | |
1549 | CONSTRUCTOR_APPEND_ELT (v, NULL_TREE, convert (ltyp, null_pointer_node)); | |
1550 | } | |
1551 | else | |
1552 | { | |
1553 | /* dtable = */ | |
1554 | CONSTRUCTOR_APPEND_ELT (v, NULL_TREE, build_int_cst (NULL_TREE, 0)); | |
1555 | ||
1556 | /* subclass_list = */ | |
1557 | CONSTRUCTOR_APPEND_ELT (v, NULL_TREE, build_int_cst (NULL_TREE, 0)); | |
1558 | ||
1559 | /* sibling_class = */ | |
1560 | CONSTRUCTOR_APPEND_ELT (v, NULL_TREE, build_int_cst (NULL_TREE, 0)); | |
1561 | } | |
1562 | ||
1563 | /* protocol_list = */ | |
1564 | ltyp = build_pointer_type (build_pointer_type (objc_protocol_template)); | |
1565 | if (! protocol_list) | |
1566 | CONSTRUCTOR_APPEND_ELT (v, NULL_TREE, build_int_cst (ltyp, 0)); | |
1567 | else | |
1568 | { | |
1569 | expr = convert (ltyp, | |
944fb799 | 1570 | build_unary_op (input_location, ADDR_EXPR, |
d764a8e6 IS |
1571 | protocol_list, 0)); |
1572 | CONSTRUCTOR_APPEND_ELT (v, NULL_TREE, expr); | |
1573 | } | |
1574 | ||
d4c433f9 | 1575 | /* FIXME: Remove NeXT runtime code. */ |
d764a8e6 IS |
1576 | if (flag_next_runtime) |
1577 | /* sel_id = NULL */ | |
1578 | CONSTRUCTOR_APPEND_ELT (v, NULL_TREE, build_int_cst (NULL_TREE, 0)); | |
1579 | ||
1580 | /* gc_object_type = NULL */ | |
1581 | CONSTRUCTOR_APPEND_ELT (v, NULL_TREE, build_int_cst (NULL_TREE, 0)); | |
1582 | ||
1583 | return objc_build_constructor (type, v); | |
1584 | } | |
1585 | ||
1586 | ||
1587 | static tree | |
1588 | generate_ivars_list (tree chain, const char *name) | |
1589 | { | |
1590 | tree initlist, ivar_list_template, decl; | |
1591 | int size; | |
9771b263 | 1592 | vec<constructor_elt, va_gc> *inits = NULL; |
d764a8e6 IS |
1593 | |
1594 | if (!chain) | |
1595 | return NULL_TREE; | |
1596 | ||
1597 | if (!objc_ivar_template) | |
1598 | objc_ivar_template = build_ivar_template (); | |
1599 | ||
1600 | size = ivar_list_length (chain); | |
1601 | ||
1602 | generating_instance_variables = 1; | |
1603 | ivar_list_template = build_ivar_list_template (objc_ivar_template, size); | |
1604 | initlist = build_ivar_list_initializer (objc_ivar_template, chain); | |
1605 | generating_instance_variables = 0; | |
1606 | ||
1607 | decl = start_var_decl (ivar_list_template, name); | |
1608 | ||
1609 | CONSTRUCTOR_APPEND_ELT (inits, NULL_TREE, build_int_cst (NULL_TREE, size)); | |
1610 | CONSTRUCTOR_APPEND_ELT (inits, NULL_TREE, initlist); | |
1611 | ||
1612 | OBJCMETA (decl, objc_meta, meta_base); | |
1613 | finish_var_decl (decl, | |
1614 | objc_build_constructor (TREE_TYPE (decl), inits)); | |
1615 | ||
1616 | return decl; | |
1617 | } | |
1618 | ||
1619 | /* static struct objc_class _OBJC_METACLASS_Foo={ ... }; | |
1620 | static struct objc_class _OBJC_CLASS_Foo={ ... }; */ | |
1621 | ||
1622 | static void | |
1623 | generate_class_structures (struct imp_entry *impent) | |
1624 | { | |
1625 | tree name_expr, super_expr, root_expr, class_decl, meta_decl; | |
1626 | tree my_root_id, my_super_id; | |
1627 | tree cast_type, initlist, protocol_decl; | |
1628 | tree inst_methods = NULL_TREE, class_methods = NULL_TREE; | |
1629 | tree chain, inst_ivars = NULL_TREE, class_ivars = NULL_TREE; | |
1630 | location_t loc; | |
1631 | char buf[BUFSIZE]; | |
1632 | int cls_flags = 0 ; | |
944fb799 | 1633 | |
d764a8e6 IS |
1634 | /* objc_implementation_context = impent->imp_context; |
1635 | implementation_template = impent->imp_template;*/ | |
1636 | class_decl = impent->class_decl; | |
1637 | meta_decl = impent->meta_decl; | |
1638 | /* UOBJC_CLASS_decl = impent->class_decl; | |
1639 | UOBJC_METACLASS_decl = impent->meta_decl;*/ | |
944fb799 | 1640 | |
d764a8e6 IS |
1641 | loc = DECL_SOURCE_LOCATION (impent->class_decl); |
1642 | ||
1643 | my_super_id = CLASS_SUPER_NAME (impent->imp_template); | |
1644 | if (my_super_id) | |
1645 | { | |
1646 | add_class_reference (my_super_id); | |
1647 | ||
1648 | /* Compute "my_root_id" - this is required for code generation. | |
1649 | the "isa" for all meta class structures points to the root of | |
1650 | the inheritance hierarchy (e.g. "__Object")... */ | |
1651 | my_root_id = my_super_id; | |
1652 | do | |
1653 | { | |
1654 | tree my_root_int = lookup_interface (my_root_id); | |
1655 | ||
1656 | if (my_root_int && CLASS_SUPER_NAME (my_root_int)) | |
1657 | my_root_id = CLASS_SUPER_NAME (my_root_int); | |
1658 | else | |
1659 | break; | |
1660 | } | |
1661 | while (1); | |
1662 | } | |
1663 | else | |
1664 | /* No super class. */ | |
1665 | my_root_id = CLASS_NAME (impent->imp_template); | |
1666 | ||
1667 | cast_type = build_pointer_type (objc_class_template); | |
1668 | name_expr = add_objc_string (CLASS_NAME (impent->imp_template), | |
1669 | class_names); | |
1670 | ||
1671 | /* Install class `isa' and `super' pointers at runtime. */ | |
1672 | if (my_super_id) | |
1673 | super_expr = add_objc_string (my_super_id, class_names); | |
1674 | else | |
1675 | super_expr = null_pointer_node; | |
944fb799 | 1676 | |
d764a8e6 IS |
1677 | super_expr = build_c_cast (loc, cast_type, super_expr); |
1678 | ||
1679 | root_expr = add_objc_string (my_root_id, class_names); | |
1680 | root_expr = build_c_cast (loc, cast_type, root_expr); | |
1681 | ||
1682 | if (CLASS_PROTOCOL_LIST (impent->imp_template)) | |
1683 | { | |
1684 | generate_protocol_references (CLASS_PROTOCOL_LIST (impent->imp_template)); | |
1685 | protocol_decl = generate_protocol_list (impent->imp_template, | |
1686 | impent->imp_context); | |
1687 | } | |
1688 | else | |
1689 | protocol_decl = NULL_TREE; | |
1690 | ||
1691 | if (CLASS_CLS_METHODS (impent->imp_context)) | |
1692 | { | |
1693 | snprintf (buf, BUFSIZE, "_OBJC_ClassMethods_%s", | |
1694 | IDENTIFIER_POINTER (CLASS_NAME (impent->imp_context))); | |
1695 | class_methods = generate_dispatch_table (CLASS_CLS_METHODS (impent->imp_context), | |
1696 | buf); | |
1697 | } | |
1698 | ||
1699 | if (CLASS_SUPER_NAME (impent->imp_template) == NULL_TREE | |
1700 | && (chain = TYPE_FIELDS (objc_class_template))) | |
1701 | { | |
1702 | snprintf (buf, BUFSIZE, "_OBJC_ClassIvars_%s", | |
1703 | IDENTIFIER_POINTER (CLASS_NAME (impent->imp_context))); | |
1704 | class_ivars = generate_ivars_list (chain, buf); | |
1705 | } | |
1706 | ||
1707 | /* static struct objc_class _OBJC_METACLASS_Foo = { ... }; */ | |
1708 | ||
944fb799 MS |
1709 | initlist = |
1710 | build_shared_structure_initializer | |
d764a8e6 IS |
1711 | (TREE_TYPE (meta_decl), |
1712 | root_expr, super_expr, name_expr, | |
944fb799 | 1713 | convert (integer_type_node, |
d764a8e6 IS |
1714 | TYPE_SIZE_UNIT (objc_class_template)), |
1715 | CLS_META, class_methods, class_ivars, | |
1716 | protocol_decl); | |
1717 | ||
1718 | finish_var_decl (meta_decl, initlist); | |
1719 | impent->meta_decl = meta_decl; | |
1720 | ||
1721 | /* static struct objc_class _OBJC_CLASS_Foo={ ... }; */ | |
1722 | if (CLASS_NST_METHODS (impent->imp_context)) | |
1723 | { | |
1724 | snprintf (buf, BUFSIZE, "_OBJC_InstanceMethods_%s", | |
1725 | IDENTIFIER_POINTER (CLASS_NAME (impent->imp_context))); | |
1726 | inst_methods = generate_dispatch_table (CLASS_NST_METHODS (impent->imp_context), | |
1727 | buf); | |
1728 | } | |
1729 | ||
1730 | if ((chain = CLASS_IVARS (impent->imp_template))) | |
1731 | { | |
1732 | snprintf (buf, BUFSIZE, "_OBJC_InstanceIvars_%s", | |
1733 | IDENTIFIER_POINTER (CLASS_NAME (impent->imp_context))); | |
1734 | inst_ivars = generate_ivars_list (chain, buf); | |
1735 | } | |
1736 | ||
944fb799 MS |
1737 | initlist = |
1738 | build_shared_structure_initializer | |
d764a8e6 IS |
1739 | (TREE_TYPE (class_decl), |
1740 | build_unary_op (loc, ADDR_EXPR, meta_decl, 0), | |
1741 | super_expr, name_expr, | |
1742 | convert (integer_type_node, | |
1743 | TYPE_SIZE_UNIT (CLASS_STATIC_TEMPLATE | |
1744 | (impent->imp_template))), | |
1745 | CLS_FACTORY | cls_flags, inst_methods, inst_ivars, | |
1746 | protocol_decl); | |
1747 | ||
1748 | finish_var_decl (class_decl, initlist); | |
1749 | impent->class_decl = class_decl; | |
1750 | } | |
1751 | ||
1752 | /* --- Output GNU Metadata --- */ | |
1753 | ||
1754 | /* TODO: Make this into an array of refs. */ | |
1755 | static void | |
1756 | handle_class_ref (tree chain) | |
1757 | { | |
1758 | const char *name = IDENTIFIER_POINTER (TREE_VALUE (chain)); | |
1759 | char *string = (char *) alloca (strlen (name) + 30); | |
1760 | tree decl; | |
1761 | tree exp; | |
1762 | ||
1763 | sprintf (string, "__objc_class_name_%s", name); | |
1764 | ||
1765 | /* Make a decl for this name, so we can use its address in a tree. */ | |
1766 | decl = build_decl (input_location, | |
1767 | VAR_DECL, get_identifier (string), TREE_TYPE (integer_zero_node)); | |
1768 | DECL_EXTERNAL (decl) = 1; | |
1769 | TREE_PUBLIC (decl) = 1; | |
1770 | DECL_CONTEXT (decl) = NULL_TREE; | |
1771 | finish_var_decl (decl, 0); | |
1772 | ||
1773 | /* Make a decl for the address. */ | |
1774 | sprintf (string, "__objc_class_ref_%s", name); | |
1775 | exp = build1 (ADDR_EXPR, string_type_node, decl); | |
1776 | decl = build_decl (input_location, | |
1777 | VAR_DECL, get_identifier (string), string_type_node); | |
1778 | TREE_STATIC (decl) = 1; | |
1779 | TREE_USED (decl) = 1; | |
1780 | DECL_READ_P (decl) = 1; | |
1781 | DECL_ARTIFICIAL (decl) = 1; | |
1782 | DECL_INITIAL (decl) = error_mark_node; | |
944fb799 | 1783 | |
d764a8e6 IS |
1784 | /* We must force the reference. */ |
1785 | DECL_PRESERVE_P (decl) = 1; | |
1786 | ||
1787 | DECL_CONTEXT (decl) = NULL_TREE; | |
1788 | finish_var_decl (decl, exp); | |
1789 | } | |
1790 | ||
1791 | static tree | |
1792 | get_proto_encoding (tree proto) | |
1793 | { | |
1794 | tree encoding; | |
1795 | if (proto) | |
1796 | { | |
1797 | if (! METHOD_ENCODING (proto)) | |
1798 | { | |
1799 | encoding = encode_method_prototype (proto); | |
1800 | METHOD_ENCODING (proto) = encoding; | |
1801 | } | |
1802 | else | |
1803 | encoding = METHOD_ENCODING (proto); | |
1804 | ||
1805 | return add_objc_string (encoding, meth_var_types); | |
1806 | } | |
1807 | else | |
1808 | return build_int_cst (NULL_TREE, 0); | |
1809 | } | |
1810 | ||
1811 | static void | |
1812 | build_gnu_selector_translation_table (void) | |
1813 | { | |
1814 | tree chain, expr; | |
9771b263 DN |
1815 | vec<constructor_elt, va_gc> *inits = NULL; |
1816 | vec<constructor_elt, va_gc> *v ; | |
d764a8e6 IS |
1817 | |
1818 | /* Cause the selector table (previously forward-declared) | |
1819 | to be actually output. */ | |
1820 | ||
1821 | for (chain = sel_ref_chain; chain; chain = TREE_CHAIN (chain)) | |
1822 | { | |
1823 | tree encoding; | |
1824 | if (warn_selector) | |
1825 | { | |
1826 | /* TODO: improve on the location for the diagnostic. */ | |
1827 | location_t loc = input_location; | |
1828 | diagnose_missing_method (TREE_VALUE (chain), loc); | |
1829 | } | |
1830 | ||
1831 | v = NULL; | |
1832 | expr = build_selector (TREE_VALUE (chain)); | |
1833 | encoding = get_proto_encoding (TREE_PURPOSE (chain)); | |
1834 | CONSTRUCTOR_APPEND_ELT (v, NULL_TREE, expr); | |
1835 | CONSTRUCTOR_APPEND_ELT (v, NULL_TREE, encoding); | |
1836 | expr = objc_build_constructor (objc_selector_template, v); | |
944fb799 | 1837 | |
d764a8e6 IS |
1838 | CONSTRUCTOR_APPEND_ELT (inits, NULL_TREE, expr); |
1839 | } /* each element in the chain */ | |
1840 | ||
1841 | /* List terminator. */ | |
1842 | v = NULL; | |
1843 | CONSTRUCTOR_APPEND_ELT (v, NULL_TREE, integer_zero_node); | |
1844 | CONSTRUCTOR_APPEND_ELT (v, NULL_TREE, integer_zero_node); | |
1845 | expr = objc_build_constructor (objc_selector_template, v); | |
1846 | ||
1847 | CONSTRUCTOR_APPEND_ELT (inits, NULL_TREE, expr); | |
1848 | expr = objc_build_constructor (TREE_TYPE (UOBJC_SELECTOR_TABLE_decl), | |
1849 | inits); | |
1850 | finish_var_decl (UOBJC_SELECTOR_TABLE_decl, expr); | |
1851 | } | |
1852 | ||
1853 | /* Output references to all statically allocated objects. Return the DECL | |
1854 | for the array built. */ | |
1855 | ||
1856 | static void | |
1857 | generate_static_references (void) | |
1858 | { | |
1859 | tree expr = NULL_TREE; | |
1860 | tree class_name, klass, decl; | |
1861 | tree cl_chain, in_chain, type | |
1862 | = build_array_type (build_pointer_type (void_type_node), NULL_TREE); | |
1863 | int num_inst, num_class; | |
1864 | char buf[BUFSIZE]; | |
9771b263 | 1865 | vec<constructor_elt, va_gc> *decls = NULL; |
d764a8e6 | 1866 | |
d4c433f9 | 1867 | /* FIXME: Remove NeXT runtime code. */ |
d764a8e6 IS |
1868 | if (flag_next_runtime) |
1869 | gcc_unreachable (); | |
1870 | ||
1871 | for (cl_chain = objc_static_instances, num_class = 0; | |
1872 | cl_chain; cl_chain = TREE_CHAIN (cl_chain), num_class++) | |
1873 | { | |
9771b263 | 1874 | vec<constructor_elt, va_gc> *v = NULL; |
d764a8e6 IS |
1875 | |
1876 | for (num_inst = 0, in_chain = TREE_PURPOSE (cl_chain); | |
1877 | in_chain; num_inst++, in_chain = TREE_CHAIN (in_chain)); | |
1878 | ||
1879 | snprintf (buf, BUFSIZE, "_OBJC_STATIC_INSTANCES_%d", num_class); | |
1880 | decl = start_var_decl (type, buf); | |
1881 | ||
1882 | /* Output {class_name, ...}. */ | |
1883 | klass = TREE_VALUE (cl_chain); | |
1884 | class_name = get_objc_string_decl (OBJC_TYPE_NAME (klass), class_names); | |
1885 | CONSTRUCTOR_APPEND_ELT (v, NULL_TREE, | |
944fb799 | 1886 | build_unary_op (input_location, |
d764a8e6 IS |
1887 | ADDR_EXPR, class_name, 1)); |
1888 | ||
1889 | /* Output {..., instance, ...}. */ | |
1890 | for (in_chain = TREE_PURPOSE (cl_chain); | |
1891 | in_chain; in_chain = TREE_CHAIN (in_chain)) | |
1892 | { | |
1893 | expr = build_unary_op (input_location, | |
1894 | ADDR_EXPR, TREE_VALUE (in_chain), 1); | |
1895 | CONSTRUCTOR_APPEND_ELT (v, NULL_TREE, expr); | |
1896 | } | |
1897 | ||
1898 | /* Output {..., NULL}. */ | |
1899 | CONSTRUCTOR_APPEND_ELT (v, NULL_TREE, build_int_cst (NULL_TREE, 0)); | |
1900 | ||
1901 | expr = objc_build_constructor (TREE_TYPE (decl), v); | |
1902 | OBJCMETA (decl, objc_meta, meta_base); | |
1903 | finish_var_decl (decl, expr); | |
1904 | CONSTRUCTOR_APPEND_ELT (decls, NULL_TREE, | |
1905 | build_unary_op (input_location, | |
1906 | ADDR_EXPR, decl, 1)); | |
1907 | } | |
1908 | ||
1909 | CONSTRUCTOR_APPEND_ELT (decls, NULL_TREE, build_int_cst (NULL_TREE, 0)); | |
1910 | expr = objc_build_constructor (type, decls); | |
1911 | static_instances_decl = start_var_decl (type, "_OBJC_STATIC_INSTANCES"); | |
1912 | OBJCMETA (static_instances_decl, objc_meta, meta_base); | |
1913 | finish_var_decl (static_instances_decl, expr); | |
1914 | } | |
1915 | ||
1916 | /* Create the initial value for the `defs' field of _objc_symtab. | |
1917 | This is a CONSTRUCTOR. */ | |
1918 | ||
1919 | static tree | |
1920 | init_def_list (tree type) | |
1921 | { | |
1922 | tree expr; | |
1923 | struct imp_entry *impent; | |
1924 | location_t loc; | |
9771b263 | 1925 | vec<constructor_elt, va_gc> *v = NULL; |
d764a8e6 IS |
1926 | |
1927 | if (imp_count) | |
1928 | for (impent = imp_list; impent; impent = impent->next) | |
1929 | { | |
1930 | if (TREE_CODE (impent->imp_context) == CLASS_IMPLEMENTATION_TYPE) | |
1931 | { | |
1932 | loc = DECL_SOURCE_LOCATION (impent->class_decl); | |
1933 | expr = build_unary_op (loc, | |
1934 | ADDR_EXPR, impent->class_decl, 0); | |
1935 | CONSTRUCTOR_APPEND_ELT (v, NULL_TREE, expr); | |
1936 | } | |
1937 | } | |
1938 | ||
1939 | if (cat_count) | |
1940 | for (impent = imp_list; impent; impent = impent->next) | |
1941 | { | |
1942 | if (TREE_CODE (impent->imp_context) == CATEGORY_IMPLEMENTATION_TYPE) | |
1943 | { | |
1944 | loc = DECL_SOURCE_LOCATION (impent->class_decl); | |
1945 | expr = build_unary_op (loc, | |
1946 | ADDR_EXPR, impent->class_decl, 0); | |
1947 | CONSTRUCTOR_APPEND_ELT (v, NULL_TREE, expr); | |
1948 | } | |
1949 | } | |
1950 | ||
1951 | loc = UNKNOWN_LOCATION; | |
1952 | /* statics = { ..., _OBJC_STATIC_INSTANCES, ... } */ | |
1953 | if (static_instances_decl) | |
1954 | expr = build_unary_op (loc, ADDR_EXPR, static_instances_decl, 0); | |
1955 | else | |
1956 | expr = integer_zero_node; | |
1957 | CONSTRUCTOR_APPEND_ELT (v, NULL_TREE, expr); | |
1958 | ||
1959 | return objc_build_constructor (type, v); | |
1960 | } | |
1961 | ||
1962 | /* Take care of defining and initializing _OBJC_SYMBOLS. */ | |
1963 | ||
1964 | /* Predefine the following data type: | |
1965 | ||
1966 | struct _objc_symtab | |
1967 | { | |
1968 | long sel_ref_cnt; | |
1969 | SEL *refs; | |
1970 | short cls_def_cnt; | |
1971 | short cat_def_cnt; | |
1972 | void *defs[cls_def_cnt + cat_def_cnt]; | |
1973 | }; */ | |
1974 | ||
1975 | static void | |
1976 | build_objc_symtab_template (void) | |
1977 | { | |
1978 | tree fields, array_type, *chain = NULL; | |
1979 | int index; | |
1980 | ||
1981 | objc_symtab_template = objc_start_struct (get_identifier (UTAG_SYMTAB)); | |
1982 | ||
1983 | /* long sel_ref_cnt; */ | |
1984 | fields = add_field_decl (long_integer_type_node, "sel_ref_cnt", &chain); | |
1985 | ||
1986 | /* SEL *refs; */ | |
1987 | add_field_decl (build_pointer_type (objc_selector_type), "refs", &chain); | |
1988 | ||
1989 | /* short cls_def_cnt; */ | |
1990 | add_field_decl (short_integer_type_node, "cls_def_cnt", &chain); | |
1991 | ||
1992 | /* short cat_def_cnt; */ | |
1993 | add_field_decl (short_integer_type_node, "cat_def_cnt", &chain); | |
1994 | ||
6d549148 | 1995 | /* Note that padding will be added here on LP64. */ |
d764a8e6 IS |
1996 | |
1997 | /* void *defs[imp_count + cat_count (+ 1)]; */ | |
1998 | /* NB: The index is one less than the size of the array. */ | |
1999 | index = imp_count + cat_count; | |
2000 | array_type = build_sized_array_type (ptr_type_node, index + 1); | |
2001 | add_field_decl (array_type, "defs", &chain); | |
2002 | ||
2003 | objc_finish_struct (objc_symtab_template, fields); | |
2004 | } | |
2005 | /* Construct the initial value for all of _objc_symtab. */ | |
2006 | ||
2007 | static tree | |
2008 | init_objc_symtab (tree type) | |
2009 | { | |
2010 | tree field, expr, ltyp; | |
2011 | location_t loc; | |
9771b263 | 2012 | vec<constructor_elt, va_gc> *v = NULL; |
d764a8e6 IS |
2013 | |
2014 | loc = UNKNOWN_LOCATION; | |
2015 | ||
2016 | /* sel_ref_cnt = { ..., 5, ... } */ | |
2017 | ||
2018 | CONSTRUCTOR_APPEND_ELT (v, NULL_TREE, | |
2019 | build_int_cst (long_integer_type_node, 0)); | |
2020 | ||
2021 | /* refs = { ..., _OBJC_SELECTOR_TABLE, ... } */ | |
2022 | ||
2023 | ltyp = build_pointer_type (objc_selector_type); | |
2024 | if (sel_ref_chain) | |
944fb799 | 2025 | expr = convert (ltyp, build_unary_op (loc, ADDR_EXPR, |
d764a8e6 IS |
2026 | UOBJC_SELECTOR_TABLE_decl, 1)); |
2027 | else | |
2028 | expr = convert (ltyp, null_pointer_node); | |
2029 | CONSTRUCTOR_APPEND_ELT (v, NULL_TREE, expr); | |
2030 | ||
2031 | /* cls_def_cnt = { ..., 5, ... } */ | |
2032 | ||
944fb799 | 2033 | CONSTRUCTOR_APPEND_ELT (v, NULL_TREE, |
d764a8e6 IS |
2034 | build_int_cst (short_integer_type_node, imp_count)); |
2035 | ||
2036 | /* cat_def_cnt = { ..., 5, ... } */ | |
2037 | ||
944fb799 | 2038 | CONSTRUCTOR_APPEND_ELT (v, NULL_TREE, |
d764a8e6 | 2039 | build_int_cst (short_integer_type_node, cat_count)); |
d4c433f9 | 2040 | |
d764a8e6 IS |
2041 | /* cls_def = { ..., { &Foo, &Bar, ...}, ... } */ |
2042 | ||
2043 | field = TYPE_FIELDS (type); | |
d764a8e6 IS |
2044 | field = DECL_CHAIN (DECL_CHAIN (DECL_CHAIN (DECL_CHAIN (field)))); |
2045 | ||
2046 | CONSTRUCTOR_APPEND_ELT (v, NULL_TREE, init_def_list (TREE_TYPE (field))); | |
2047 | ||
2048 | return objc_build_constructor (type, v); | |
2049 | } | |
2050 | ||
2051 | /* Create the declaration of _OBJC_SYMBOLS, with type `struct _objc_symtab' | |
2052 | and initialized appropriately. */ | |
2053 | ||
2054 | static void | |
2055 | generate_objc_symtab_decl (void) | |
2056 | { | |
2057 | build_objc_symtab_template (); | |
2058 | UOBJC_SYMBOLS_decl = start_var_decl (objc_symtab_template, "_OBJC_SYMBOLS"); | |
2059 | OBJCMETA (UOBJC_SYMBOLS_decl, objc_meta, meta_base); | |
2060 | finish_var_decl (UOBJC_SYMBOLS_decl, | |
2061 | init_objc_symtab (TREE_TYPE (UOBJC_SYMBOLS_decl))); | |
2062 | } | |
2063 | ||
2064 | static void | |
2065 | objc_generate_v1_gnu_metadata (void) | |
2066 | { | |
2067 | struct imp_entry *impent; | |
2068 | tree chain; | |
2069 | ||
2070 | /* Process the static instances here because initialization of objc_symtab | |
2071 | depends on them. */ | |
2072 | if (objc_static_instances) | |
2073 | generate_static_references (); | |
2074 | ||
2075 | objc_implementation_context = | |
2076 | implementation_template = | |
2077 | UOBJC_CLASS_decl = | |
2078 | UOBJC_METACLASS_decl = NULL_TREE; | |
2079 | ||
2080 | for (impent = imp_list; impent; impent = impent->next) | |
2081 | { | |
2082 | /* If -gen-decls is present, Dump the @interface of each class. | |
2083 | TODO: Dump the classes in the order they were found, rather than in | |
2084 | reverse order as we are doing now. */ | |
2085 | if (flag_gen_declaration) | |
2086 | dump_interface (gen_declaration_file, impent->imp_context); | |
2087 | ||
2088 | /* all of the following reference the string pool... */ | |
2089 | if (TREE_CODE (impent->imp_context) == CLASS_IMPLEMENTATION_TYPE) | |
2090 | generate_class_structures (impent); | |
2091 | else | |
2092 | generate_category (impent); | |
2093 | } | |
2094 | ||
2095 | /* If we are using an array of selectors, we must always | |
2096 | finish up the array decl even if no selectors were used. */ | |
2097 | build_gnu_selector_translation_table (); | |
2098 | ||
2099 | if (protocol_chain) | |
2100 | generate_protocols (); | |
2101 | ||
2102 | /* Arrange for ObjC data structures to be initialized at run time. */ | |
475b5d2a NP |
2103 | /* FIXME: Have some more elegant way to determine if we need to |
2104 | generate objc_symtab_decl or not, instead of checking these | |
2105 | global symbols. */ | |
2106 | if (imp_list || class_names_chain | |
2107 | || meth_var_names_chain || meth_var_types_chain || sel_ref_chain | |
2108 | || prop_names_attr_chain) | |
2109 | generate_objc_symtab_decl (); | |
2110 | ||
2111 | if (imp_list || class_names_chain || objc_static_instances | |
2112 | || meth_var_names_chain || meth_var_types_chain || sel_ref_chain) | |
2113 | { | |
2114 | /* Make sure that the meta-data are identified as being | |
2115 | GNU-runtime. */ | |
944fb799 | 2116 | build_module_descriptor (OBJC_VERSION, |
475b5d2a NP |
2117 | build_tree_list (objc_meta, meta_base)); |
2118 | build_module_initializer_routine (); | |
2119 | } | |
d764a8e6 IS |
2120 | |
2121 | /* Dump the class references. This forces the appropriate classes | |
2122 | to be linked into the executable image, preserving unix archive | |
2123 | semantics. This can be removed when we move to a more dynamically | |
2124 | linked environment. */ | |
2125 | ||
2126 | for (chain = cls_ref_chain; chain; chain = TREE_CHAIN (chain)) | |
2127 | { | |
2128 | handle_class_ref (chain); | |
2129 | if (TREE_PURPOSE (chain)) | |
2130 | generate_classref_translation_entry (chain); | |
2131 | } | |
2132 | ||
2133 | for (impent = imp_list; impent; impent = impent->next) | |
2134 | handle_impent (impent); | |
2135 | ||
2136 | generate_strings (); | |
2137 | } | |
2138 | ||
2139 | /* --- exceptions --- */ | |
2140 | ||
2141 | static GTY(()) tree objc_eh_personality_decl; | |
2142 | ||
2143 | static tree | |
2144 | objc_eh_runtime_type (tree type) | |
2145 | { | |
2146 | tree ident, eh_id, decl, str; | |
2147 | ||
2148 | if (type == error_mark_node | |
2149 | || errorcount || sorrycount) | |
2150 | { | |
2151 | /* Use 'ErrorMarkNode' as class name when error_mark_node is found | |
2152 | to prevent an ICE. Note that we know that the compiler will | |
2153 | terminate with an error and this 'ErrorMarkNode' class name will | |
2154 | never be actually used. */ | |
2155 | ident = get_identifier ("ErrorMarkNode"); | |
2156 | goto make_err_class; | |
2157 | } | |
2158 | ||
2159 | if (POINTER_TYPE_P (type) && objc_is_object_id (TREE_TYPE (type))) | |
2160 | /* We don't want to identify 'id' for GNU. Instead, build a 0 | |
2161 | entry in the exceptions table. */ | |
944fb799 | 2162 | return null_pointer_node; |
d764a8e6 IS |
2163 | |
2164 | if (!POINTER_TYPE_P (type) || !TYPED_OBJECT (TREE_TYPE (type))) | |
2165 | { | |
2166 | #ifdef OBJCPLUS | |
2167 | /* This routine is also called for c++ catch clauses; in which case, | |
2168 | we use the c++ typeinfo decl. */ | |
2169 | return build_eh_type_type (type); | |
2170 | #else | |
0f2c4a8f | 2171 | error ("non-objective-c type %qT cannot be caught", type); |
d764a8e6 IS |
2172 | ident = get_identifier ("ErrorMarkNode"); |
2173 | goto make_err_class; | |
2174 | #endif | |
2175 | } | |
2176 | else | |
2177 | ident = OBJC_TYPE_NAME (TREE_TYPE (type)); | |
2178 | ||
2179 | make_err_class: | |
2180 | /* If this class was already referenced, then it will be output during | |
2181 | meta-data emission, so we don't need to do it here. */ | |
2182 | decl = get_objc_string_decl (ident, class_names); | |
2183 | eh_id = add_objc_string (ident, class_names); | |
2184 | if (!decl) | |
2185 | { | |
2186 | /* Not found ... so we need to build it - from the freshly-entered id. */ | |
2187 | decl = get_objc_string_decl (ident, class_names); | |
2188 | str = my_build_string (IDENTIFIER_LENGTH (ident) + 1, | |
2189 | IDENTIFIER_POINTER (ident)); | |
2190 | /* We have to finalize this var here, because this might be called after | |
2191 | all the other metadata strings have been emitted. */ | |
2192 | finish_var_decl (decl, str); | |
2193 | } | |
2194 | return eh_id; | |
2195 | } | |
2196 | ||
2197 | static tree | |
2198 | objc_eh_personality (void) | |
2199 | { | |
2200 | if (!objc_eh_personality_decl) | |
2201 | #ifndef OBJCPLUS | |
2202 | objc_eh_personality_decl = build_personality_function ("gnu_objc"); | |
2203 | #else | |
2204 | objc_eh_personality_decl = build_personality_function ("gxx"); | |
2205 | #endif | |
2206 | return objc_eh_personality_decl; | |
2207 | } | |
2208 | ||
2209 | /* -- interfaces --- */ | |
2210 | ||
2211 | static tree | |
2212 | build_throw_stmt (location_t loc, tree throw_expr, bool rethrown ATTRIBUTE_UNUSED) | |
2213 | { | |
2214 | tree t; | |
9771b263 DN |
2215 | vec<tree, va_gc> *parms; |
2216 | vec_alloc (parms, 1); | |
d764a8e6 IS |
2217 | /* A throw is just a call to the runtime throw function with the |
2218 | object as a parameter. */ | |
9771b263 | 2219 | parms->quick_push (throw_expr); |
81e5eca8 MP |
2220 | t = build_function_call_vec (loc, vNULL, objc_exception_throw_decl, parms, |
2221 | NULL); | |
9771b263 | 2222 | vec_free (parms); |
d764a8e6 IS |
2223 | return add_stmt (t); |
2224 | } | |
2225 | ||
2226 | /* Build __builtin_eh_pointer. */ | |
2227 | ||
2228 | static tree | |
2229 | objc_build_exc_ptr (struct objc_try_context **x ATTRIBUTE_UNUSED) | |
2230 | { | |
2231 | tree t; | |
e79983f4 | 2232 | t = builtin_decl_explicit (BUILT_IN_EH_POINTER); |
d764a8e6 IS |
2233 | t = build_call_expr (t, 1, integer_zero_node); |
2234 | return fold_convert (objc_object_type, t); | |
2235 | } | |
2236 | ||
944fb799 | 2237 | static tree |
d764a8e6 IS |
2238 | begin_catch (struct objc_try_context **cur_try_context, tree type, |
2239 | tree decl, tree compound, bool ellipsis ATTRIBUTE_UNUSED) | |
2240 | { | |
2241 | tree t; | |
2242 | /* Record the data for the catch in the try context so that we can | |
2243 | finalize it later. */ | |
2244 | if (ellipsis) | |
2245 | t = build_stmt (input_location, CATCH_EXPR, NULL, compound); | |
2246 | else | |
2247 | t = build_stmt (input_location, CATCH_EXPR, type, compound); | |
2248 | (*cur_try_context)->current_catch = t; | |
2249 | ||
2250 | /* Initialize the decl from the EXC_PTR_EXPR we get from the runtime. */ | |
2251 | t = objc_build_exc_ptr (cur_try_context); | |
2252 | t = convert (TREE_TYPE (decl), t); | |
2253 | return build2 (MODIFY_EXPR, void_type_node, decl, t); | |
2254 | } | |
2255 | ||
944fb799 | 2256 | static void |
d764a8e6 IS |
2257 | finish_catch (struct objc_try_context **cur_try_context, tree current_catch) |
2258 | { | |
2259 | append_to_statement_list (current_catch, &((*cur_try_context)->catch_list)); | |
2260 | } | |
2261 | ||
944fb799 | 2262 | static tree |
d764a8e6 IS |
2263 | finish_try_stmt (struct objc_try_context **cur_try_context) |
2264 | { | |
2265 | struct objc_try_context *c = *cur_try_context; | |
2266 | tree stmt = c->try_body; | |
2267 | if (c->catch_list) | |
2268 | stmt = build_stmt (c->try_locus, TRY_CATCH_EXPR, stmt, c->catch_list); | |
2269 | if (c->finally_body) | |
2270 | stmt = build_stmt (c->try_locus, TRY_FINALLY_EXPR, stmt, c->finally_body); | |
2271 | return stmt; | |
2272 | } | |
2273 | ||
2274 | #include "gt-objc-objc-gnu-runtime-abi-01.h" |