1 /* Implement classes and message passing for Objective C.
2 Copyright (C) 1992, 1993, 1994, 1995, 1997, 1998, 1999, 2000,
3 2001, 2002, 2003, 2004, 2005, 2007, 2008 Free Software Foundation, Inc.
4 Contributed by Steve Naroff.
6 This file is part of GCC.
8 GCC is free software; you can redistribute it and/or modify
9 it under the terms of the GNU General Public License as published by
10 the Free Software Foundation; either version 3, or (at your option)
13 GCC is distributed in the hope that it will be useful,
14 but WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 GNU General Public License for more details.
18 You should have received a copy of the GNU General Public License
19 along with GCC; see the file COPYING3. If not see
20 <http://www.gnu.org/licenses/>. */
23 /* Purpose: This module implements the Objective-C 4.0 language.
25 compatibility issues (with the Stepstone translator):
27 - does not recognize the following 3.3 constructs.
28 @requires, @classes, @messages, = (...)
29 - methods with variable arguments must conform to ANSI standard.
30 - tagged structure definitions that appear in BOTH the interface
31 and implementation are not allowed.
32 - public/private: all instance variables are public within the
33 context of the implementation...I consider this to be a bug in
35 - statically allocated objects are not supported. the user will
36 receive an error if this service is requested.
38 code generation `options':
44 #include "coretypes.h"
60 #include "langhooks.h"
71 #include "diagnostic.h"
73 #include "tree-iterator.h"
76 #include "langhooks-def.h"
78 #define OBJC_VOID_AT_END void_list_node
80 static unsigned int should_call_super_dealloc = 0;
82 /* When building Objective-C++, we are not linking against the C front-end
83 and so need to replicate the C tree-construction functions in some way. */
85 #define OBJCP_REMAP_FUNCTIONS
86 #include "objcp-decl.h"
89 /* This is the default way of generating a method name. */
90 /* I am not sure it is really correct.
91 Perhaps there's a danger that it will make name conflicts
92 if method names contain underscores. -- rms. */
93 #ifndef OBJC_GEN_METHOD_LABEL
94 #define OBJC_GEN_METHOD_LABEL(BUF, IS_INST, CLASS_NAME, CAT_NAME, SEL_NAME, NUM) \
97 sprintf ((BUF), "_%s_%s_%s_%s", \
98 ((IS_INST) ? "i" : "c"), \
100 ((CAT_NAME)? (CAT_NAME) : ""), \
102 for (temp = (BUF); *temp; temp++) \
103 if (*temp == ':') *temp = '_'; \
107 /* These need specifying. */
108 #ifndef OBJC_FORWARDING_STACK_OFFSET
109 #define OBJC_FORWARDING_STACK_OFFSET 0
112 #ifndef OBJC_FORWARDING_MIN_OFFSET
113 #define OBJC_FORWARDING_MIN_OFFSET 0
116 /* Set up for use of obstacks. */
120 /* This obstack is used to accumulate the encoding of a data type. */
121 static struct obstack util_obstack;
123 /* This points to the beginning of obstack contents, so we can free
124 the whole contents. */
127 /* The version identifies which language generation and runtime
128 the module (file) was compiled for, and is recorded in the
129 module descriptor. */
131 #define OBJC_VERSION (flag_next_runtime ? 6 : 8)
132 #define PROTOCOL_VERSION 2
134 /* (Decide if these can ever be validly changed.) */
135 #define OBJC_ENCODE_INLINE_DEFS 0
136 #define OBJC_ENCODE_DONT_INLINE_DEFS 1
138 /*** Private Interface (procedures) ***/
140 /* Used by compile_file. */
142 static void init_objc (void);
143 static void finish_objc (void);
145 /* Code generation. */
147 static tree objc_build_constructor (tree, tree);
148 static tree build_objc_method_call (int, tree, tree, tree, tree);
149 static tree get_proto_encoding (tree);
150 static tree lookup_interface (tree);
151 static tree objc_add_static_instance (tree, tree);
153 static tree start_class (enum tree_code, tree, tree, tree);
154 static tree continue_class (tree);
155 static void finish_class (tree);
156 static void start_method_def (tree);
158 static void objc_start_function (tree, tree, tree, tree);
160 static void objc_start_function (tree, tree, tree, struct c_arg_info *);
162 static tree start_protocol (enum tree_code, tree, tree);
163 static tree build_method_decl (enum tree_code, tree, tree, tree, bool);
164 static tree objc_add_method (tree, tree, int);
165 static tree add_instance_variable (tree, int, tree);
166 static tree build_ivar_reference (tree);
167 static tree is_ivar (tree, tree);
169 static void build_objc_exception_stuff (void);
170 static void build_next_objc_exception_stuff (void);
172 /* We only need the following for ObjC; ObjC++ will use C++'s definition
173 of DERIVED_FROM_P. */
175 static bool objc_derived_from_p (tree, tree);
176 #define DERIVED_FROM_P(PARENT, CHILD) objc_derived_from_p (PARENT, CHILD)
178 static void objc_xref_basetypes (tree, tree);
180 static void build_class_template (void);
181 static void build_selector_template (void);
182 static void build_category_template (void);
183 static void build_super_template (void);
184 static tree build_protocol_initializer (tree, tree, tree, tree, tree);
185 static tree get_class_ivars (tree, bool);
186 static tree generate_protocol_list (tree);
187 static void build_protocol_reference (tree);
190 static void objc_generate_cxx_cdtors (void);
193 static const char *synth_id_with_class_suffix (const char *, tree);
195 /* Hash tables to manage the global pool of method prototypes. */
197 hash *nst_method_hash_list = 0;
198 hash *cls_method_hash_list = 0;
200 static hash hash_lookup (hash *, tree);
201 static tree lookup_method (tree, tree);
202 static tree lookup_method_static (tree, tree, int);
206 class_names, /* class, category, protocol, module names */
207 meth_var_names, /* method and variable names */
208 meth_var_types /* method and variable type descriptors */
211 static tree add_objc_string (tree, enum string_section);
212 static tree build_objc_string_decl (enum string_section);
213 static void build_selector_table_decl (void);
215 /* Protocol additions. */
217 static tree lookup_protocol (tree);
218 static tree lookup_and_install_protocols (tree);
222 static void encode_type_qualifiers (tree);
223 static void encode_type (tree, int, int);
224 static void encode_field_decl (tree, int, int);
227 static void really_start_method (tree, tree);
229 static void really_start_method (tree, struct c_arg_info *);
231 static int comp_proto_with_proto (tree, tree, int);
232 static void objc_push_parm (tree);
234 static tree objc_get_parm_info (int);
236 static struct c_arg_info *objc_get_parm_info (int);
239 /* Utilities for debugging and error diagnostics. */
241 static void warn_with_method (const char *, int, tree);
242 static char *gen_type_name (tree);
243 static char *gen_type_name_0 (tree);
244 static char *gen_method_decl (tree);
245 static char *gen_declaration (tree);
247 /* Everything else. */
249 static tree create_field_decl (tree, const char *);
250 static void add_class_reference (tree);
251 static void build_protocol_template (void);
252 static tree encode_method_prototype (tree);
253 static void generate_classref_translation_entry (tree);
254 static void handle_class_ref (tree);
255 static void generate_struct_by_value_array (void)
257 static void mark_referenced_methods (void);
258 static void generate_objc_image_info (void);
260 /*** Private Interface (data) ***/
262 /* Reserved tag definitions. */
264 #define OBJECT_TYPEDEF_NAME "id"
265 #define CLASS_TYPEDEF_NAME "Class"
267 #define TAG_OBJECT "objc_object"
268 #define TAG_CLASS "objc_class"
269 #define TAG_SUPER "objc_super"
270 #define TAG_SELECTOR "objc_selector"
272 #define UTAG_CLASS "_objc_class"
273 #define UTAG_IVAR "_objc_ivar"
274 #define UTAG_IVAR_LIST "_objc_ivar_list"
275 #define UTAG_METHOD "_objc_method"
276 #define UTAG_METHOD_LIST "_objc_method_list"
277 #define UTAG_CATEGORY "_objc_category"
278 #define UTAG_MODULE "_objc_module"
279 #define UTAG_SYMTAB "_objc_symtab"
280 #define UTAG_SUPER "_objc_super"
281 #define UTAG_SELECTOR "_objc_selector"
283 #define UTAG_PROTOCOL "_objc_protocol"
284 #define UTAG_METHOD_PROTOTYPE "_objc_method_prototype"
285 #define UTAG_METHOD_PROTOTYPE_LIST "_objc__method_prototype_list"
287 /* Note that the string object global name is only needed for the
289 #define STRING_OBJECT_GLOBAL_FORMAT "_%sClassReference"
291 #define PROTOCOL_OBJECT_CLASS_NAME "Protocol"
293 static const char *TAG_GETCLASS;
294 static const char *TAG_GETMETACLASS;
295 static const char *TAG_MSGSEND;
296 static const char *TAG_MSGSENDSUPER;
297 /* The NeXT Objective-C messenger may have two extra entry points, for use
298 when returning a structure. */
299 static const char *TAG_MSGSEND_STRET;
300 static const char *TAG_MSGSENDSUPER_STRET;
301 static const char *default_constant_string_class_name;
303 /* Runtime metadata flags. */
304 #define CLS_FACTORY 0x0001L
305 #define CLS_META 0x0002L
306 #define CLS_HAS_CXX_STRUCTORS 0x2000L
308 #define OBJC_MODIFIER_STATIC 0x00000001
309 #define OBJC_MODIFIER_FINAL 0x00000002
310 #define OBJC_MODIFIER_PUBLIC 0x00000004
311 #define OBJC_MODIFIER_PRIVATE 0x00000008
312 #define OBJC_MODIFIER_PROTECTED 0x00000010
313 #define OBJC_MODIFIER_NATIVE 0x00000020
314 #define OBJC_MODIFIER_SYNCHRONIZED 0x00000040
315 #define OBJC_MODIFIER_ABSTRACT 0x00000080
316 #define OBJC_MODIFIER_VOLATILE 0x00000100
317 #define OBJC_MODIFIER_TRANSIENT 0x00000200
318 #define OBJC_MODIFIER_NONE_SPECIFIED 0x80000000
320 /* NeXT-specific tags. */
322 #define TAG_MSGSEND_NONNIL "objc_msgSendNonNil"
323 #define TAG_MSGSEND_NONNIL_STRET "objc_msgSendNonNil_stret"
324 #define TAG_EXCEPTIONEXTRACT "objc_exception_extract"
325 #define TAG_EXCEPTIONTRYENTER "objc_exception_try_enter"
326 #define TAG_EXCEPTIONTRYEXIT "objc_exception_try_exit"
327 #define TAG_EXCEPTIONMATCH "objc_exception_match"
328 #define TAG_EXCEPTIONTHROW "objc_exception_throw"
329 #define TAG_SYNCENTER "objc_sync_enter"
330 #define TAG_SYNCEXIT "objc_sync_exit"
331 #define TAG_SETJMP "_setjmp"
332 #define UTAG_EXCDATA "_objc_exception_data"
334 #define TAG_ASSIGNIVAR "objc_assign_ivar"
335 #define TAG_ASSIGNGLOBAL "objc_assign_global"
336 #define TAG_ASSIGNSTRONGCAST "objc_assign_strongCast"
338 /* Branch entry points. All that matters here are the addresses;
339 functions with these names do not really exist in libobjc. */
341 #define TAG_MSGSEND_FAST "objc_msgSend_Fast"
342 #define TAG_ASSIGNIVAR_FAST "objc_assign_ivar_Fast"
344 #define TAG_CXX_CONSTRUCT ".cxx_construct"
345 #define TAG_CXX_DESTRUCT ".cxx_destruct"
347 /* GNU-specific tags. */
349 #define TAG_EXECCLASS "__objc_exec_class"
350 #define TAG_GNUINIT "__objc_gnu_init"
352 /* Flags for lookup_method_static(). */
353 #define OBJC_LOOKUP_CLASS 1 /* Look for class methods. */
354 #define OBJC_LOOKUP_NO_SUPER 2 /* Do not examine superclasses. */
356 /* The OCTI_... enumeration itself is in objc/objc-act.h. */
357 tree objc_global_trees[OCTI_MAX];
359 static void handle_impent (struct imp_entry *);
361 struct imp_entry *imp_list = 0;
362 int imp_count = 0; /* `@implementation' */
363 int cat_count = 0; /* `@category' */
365 enum tree_code objc_inherit_code;
366 int objc_public_flag;
368 /* Use to generate method labels. */
369 static int method_slot = 0;
373 static char *errbuf; /* Buffer for error diagnostics */
375 /* Data imported from tree.c. */
377 extern enum debug_info_type write_symbols;
379 /* Data imported from toplev.c. */
381 extern const char *dump_base_name;
383 static int flag_typed_selectors;
385 /* Store all constructed constant strings in a hash table so that
386 they get uniqued properly. */
388 struct string_descriptor GTY(())
390 /* The literal argument . */
393 /* The resulting constant string. */
397 static GTY((param_is (struct string_descriptor))) htab_t string_htab;
399 /* Store the EH-volatilized types in a hash table, for easy retrieval. */
400 struct volatilized_type GTY(())
405 static GTY((param_is (struct volatilized_type))) htab_t volatilized_htab;
407 FILE *gen_declaration_file;
409 /* Tells "encode_pointer/encode_aggregate" whether we are generating
410 type descriptors for instance variables (as opposed to methods).
411 Type descriptors for instance variables contain more information
412 than methods (for static typing and embedded structures). */
414 static int generating_instance_variables = 0;
416 /* Some platforms pass small structures through registers versus
417 through an invisible pointer. Determine at what size structure is
418 the transition point between the two possibilities. */
421 generate_struct_by_value_array (void)
424 tree field_decl, field_decl_chain;
426 int aggregate_in_mem[32];
429 /* Presumably no platform passes 32 byte structures in a register. */
430 for (i = 1; i < 32; i++)
434 /* Create an unnamed struct that has `i' character components */
435 type = start_struct (RECORD_TYPE, NULL_TREE);
437 strcpy (buffer, "c1");
438 field_decl = create_field_decl (char_type_node,
440 field_decl_chain = field_decl;
442 for (j = 1; j < i; j++)
444 sprintf (buffer, "c%d", j + 1);
445 field_decl = create_field_decl (char_type_node,
447 chainon (field_decl_chain, field_decl);
449 finish_struct (type, field_decl_chain, NULL_TREE);
451 aggregate_in_mem[i] = aggregate_value_p (type, 0);
452 if (!aggregate_in_mem[i])
456 /* We found some structures that are returned in registers instead of memory
457 so output the necessary data. */
460 for (i = 31; i >= 0; i--)
461 if (!aggregate_in_mem[i])
463 printf ("#define OBJC_MAX_STRUCT_BY_VALUE %d\n\n", i);
465 /* The first member of the structure is always 0 because we don't handle
466 structures with 0 members */
467 printf ("static int struct_forward_array[] = {\n 0");
469 for (j = 1; j <= i; j++)
470 printf (", %d", aggregate_in_mem[j]);
481 if (cxx_init () == false)
483 if (c_objc_common_init () == false)
487 /* If gen_declaration desired, open the output file. */
488 if (flag_gen_declaration)
490 register char * const dumpname = concat (dump_base_name, ".decl", NULL);
491 gen_declaration_file = fopen (dumpname, "w");
492 if (gen_declaration_file == 0)
493 fatal_error ("can't open %s: %m", dumpname);
497 if (flag_next_runtime)
499 TAG_GETCLASS = "objc_getClass";
500 TAG_GETMETACLASS = "objc_getMetaClass";
501 TAG_MSGSEND = "objc_msgSend";
502 TAG_MSGSENDSUPER = "objc_msgSendSuper";
503 TAG_MSGSEND_STRET = "objc_msgSend_stret";
504 TAG_MSGSENDSUPER_STRET = "objc_msgSendSuper_stret";
505 default_constant_string_class_name = "NSConstantString";
509 TAG_GETCLASS = "objc_get_class";
510 TAG_GETMETACLASS = "objc_get_meta_class";
511 TAG_MSGSEND = "objc_msg_lookup";
512 TAG_MSGSENDSUPER = "objc_msg_lookup_super";
513 /* GNU runtime does not provide special functions to support
514 structure-returning methods. */
515 default_constant_string_class_name = "NXConstantString";
516 flag_typed_selectors = 1;
521 if (print_struct_values)
522 generate_struct_by_value_array ();
528 objc_finish_file (void)
530 mark_referenced_methods ();
533 /* We need to instantiate templates _before_ we emit ObjC metadata;
534 if we do not, some metadata (such as selectors) may go missing. */
536 instantiate_pending_templates (0);
539 /* Finalize Objective-C runtime data. No need to generate tables
540 and code if only checking syntax, or if generating a PCH file. */
541 if (!flag_syntax_only && !pch_file)
544 if (gen_declaration_file)
545 fclose (gen_declaration_file);
548 /* Return the first occurrence of a method declaration corresponding
549 to sel_name in rproto_list. Search rproto_list recursively.
550 If is_class is 0, search for instance methods, otherwise for class
553 lookup_method_in_protocol_list (tree rproto_list, tree sel_name,
559 for (rproto = rproto_list; rproto; rproto = TREE_CHAIN (rproto))
561 p = TREE_VALUE (rproto);
563 if (TREE_CODE (p) == PROTOCOL_INTERFACE_TYPE)
565 if ((fnd = lookup_method (is_class
566 ? PROTOCOL_CLS_METHODS (p)
567 : PROTOCOL_NST_METHODS (p), sel_name)))
569 else if (PROTOCOL_LIST (p))
570 fnd = lookup_method_in_protocol_list (PROTOCOL_LIST (p),
575 ; /* An identifier...if we could not find a protocol. */
586 lookup_protocol_in_reflist (tree rproto_list, tree lproto)
590 /* Make sure the protocol is supported by the object on the rhs. */
591 if (TREE_CODE (lproto) == PROTOCOL_INTERFACE_TYPE)
594 for (rproto = rproto_list; rproto; rproto = TREE_CHAIN (rproto))
596 p = TREE_VALUE (rproto);
598 if (TREE_CODE (p) == PROTOCOL_INTERFACE_TYPE)
603 else if (PROTOCOL_LIST (p))
604 fnd = lookup_protocol_in_reflist (PROTOCOL_LIST (p), lproto);
613 ; /* An identifier...if we could not find a protocol. */
620 objc_start_class_interface (tree klass, tree super_class, tree protos)
622 objc_interface_context
624 = start_class (CLASS_INTERFACE_TYPE, klass, super_class, protos);
625 objc_public_flag = 0;
629 objc_start_category_interface (tree klass, tree categ, tree protos)
631 objc_interface_context
632 = start_class (CATEGORY_INTERFACE_TYPE, klass, categ, protos);
634 = continue_class (objc_interface_context);
638 objc_start_protocol (tree name, tree protos)
640 objc_interface_context
641 = start_protocol (PROTOCOL_INTERFACE_TYPE, name, protos);
645 objc_continue_interface (void)
648 = continue_class (objc_interface_context);
652 objc_finish_interface (void)
654 finish_class (objc_interface_context);
655 objc_interface_context = NULL_TREE;
659 objc_start_class_implementation (tree klass, tree super_class)
661 objc_implementation_context
663 = start_class (CLASS_IMPLEMENTATION_TYPE, klass, super_class, NULL_TREE);
664 objc_public_flag = 0;
668 objc_start_category_implementation (tree klass, tree categ)
670 objc_implementation_context
671 = start_class (CATEGORY_IMPLEMENTATION_TYPE, klass, categ, NULL_TREE);
673 = continue_class (objc_implementation_context);
677 objc_continue_implementation (void)
680 = continue_class (objc_implementation_context);
684 objc_finish_implementation (void)
687 if (flag_objc_call_cxx_cdtors)
688 objc_generate_cxx_cdtors ();
691 if (objc_implementation_context)
693 finish_class (objc_implementation_context);
694 objc_ivar_chain = NULL_TREE;
695 objc_implementation_context = NULL_TREE;
698 warning (0, "%<@end%> must appear in an @implementation context");
702 objc_set_visibility (int visibility)
704 objc_public_flag = visibility;
708 objc_set_method_type (enum tree_code type)
710 objc_inherit_code = (type == PLUS_EXPR
712 : INSTANCE_METHOD_DECL);
716 objc_build_method_signature (tree rettype, tree selector,
717 tree optparms, bool ellipsis)
719 return build_method_decl (objc_inherit_code, rettype, selector,
724 objc_add_method_declaration (tree decl)
726 if (!objc_interface_context)
727 fatal_error ("method declaration not in @interface context");
729 objc_add_method (objc_interface_context,
731 objc_inherit_code == CLASS_METHOD_DECL);
735 objc_start_method_definition (tree decl)
737 if (!objc_implementation_context)
738 fatal_error ("method definition not in @implementation context");
740 objc_add_method (objc_implementation_context,
742 objc_inherit_code == CLASS_METHOD_DECL);
743 start_method_def (decl);
747 objc_add_instance_variable (tree decl)
749 (void) add_instance_variable (objc_ivar_context,
754 /* Return 1 if IDENT is an ObjC/ObjC++ reserved keyword in the context of
758 objc_is_reserved_word (tree ident)
760 unsigned char code = C_RID_CODE (ident);
762 return (OBJC_IS_AT_KEYWORD (code)
763 || code == RID_CLASS || code == RID_PUBLIC
764 || code == RID_PROTECTED || code == RID_PRIVATE
765 || code == RID_TRY || code == RID_THROW || code == RID_CATCH);
768 /* Return true if TYPE is 'id'. */
771 objc_is_object_id (tree type)
773 return OBJC_TYPE_NAME (type) == objc_object_id;
777 objc_is_class_id (tree type)
779 return OBJC_TYPE_NAME (type) == objc_class_id;
782 /* Construct a C struct with same name as KLASS, a base struct with tag
783 SUPER_NAME (if any), and FIELDS indicated. */
786 objc_build_struct (tree klass, tree fields, tree super_name)
788 tree name = CLASS_NAME (klass);
789 tree s = start_struct (RECORD_TYPE, name);
790 tree super = (super_name ? xref_tag (RECORD_TYPE, super_name) : NULL_TREE);
791 tree t, objc_info = NULL_TREE;
795 /* Prepend a packed variant of the base class into the layout. This
796 is necessary to preserve ObjC ABI compatibility. */
797 tree base = build_decl (FIELD_DECL, NULL_TREE, super);
798 tree field = TYPE_FIELDS (super);
800 while (field && TREE_CHAIN (field)
801 && TREE_CODE (TREE_CHAIN (field)) == FIELD_DECL)
802 field = TREE_CHAIN (field);
804 /* For ObjC ABI purposes, the "packed" size of a base class is
805 the sum of the offset and the size (in bits) of the last field
808 = (field && TREE_CODE (field) == FIELD_DECL
809 ? size_binop (PLUS_EXPR,
810 size_binop (PLUS_EXPR,
813 convert (bitsizetype,
814 DECL_FIELD_OFFSET (field)),
815 bitsize_int (BITS_PER_UNIT)),
816 DECL_FIELD_BIT_OFFSET (field)),
818 : bitsize_zero_node);
819 DECL_SIZE_UNIT (base)
820 = size_binop (FLOOR_DIV_EXPR, convert (sizetype, DECL_SIZE (base)),
821 size_int (BITS_PER_UNIT));
822 DECL_ARTIFICIAL (base) = 1;
823 DECL_ALIGN (base) = 1;
824 DECL_FIELD_CONTEXT (base) = s;
826 DECL_FIELD_IS_BASE (base) = 1;
829 TREE_NO_WARNING (fields) = 1; /* Suppress C++ ABI warnings -- we */
830 #endif /* are following the ObjC ABI here. */
831 TREE_CHAIN (base) = fields;
835 /* NB: Calling finish_struct() may cause type TYPE_LANG_SPECIFIC fields
836 in all variants of this RECORD_TYPE to be clobbered, but it is therein
837 that we store protocol conformance info (e.g., 'NSObject <MyProtocol>').
838 Hence, we must squirrel away the ObjC-specific information before calling
839 finish_struct(), and then reinstate it afterwards. */
841 for (t = TYPE_NEXT_VARIANT (s); t; t = TYPE_NEXT_VARIANT (t))
843 = chainon (objc_info,
844 build_tree_list (NULL_TREE, TYPE_OBJC_INFO (t)));
846 /* Point the struct at its related Objective-C class. */
847 INIT_TYPE_OBJC_INFO (s);
848 TYPE_OBJC_INTERFACE (s) = klass;
850 s = finish_struct (s, fields, NULL_TREE);
852 for (t = TYPE_NEXT_VARIANT (s); t;
853 t = TYPE_NEXT_VARIANT (t), objc_info = TREE_CHAIN (objc_info))
855 TYPE_OBJC_INFO (t) = TREE_VALUE (objc_info);
856 /* Replace the IDENTIFIER_NODE with an actual @interface. */
857 TYPE_OBJC_INTERFACE (t) = klass;
860 /* Use TYPE_BINFO structures to point at the super class, if any. */
861 objc_xref_basetypes (s, super);
863 /* Mark this struct as a class template. */
864 CLASS_STATIC_TEMPLATE (klass) = s;
869 /* Build a type differing from TYPE only in that TYPE_VOLATILE is set.
870 Unlike tree.c:build_qualified_type(), preserve TYPE_LANG_SPECIFIC in the
873 objc_build_volatilized_type (tree type)
877 /* Check if we have not constructed the desired variant already. */
878 for (t = TYPE_MAIN_VARIANT (type); t; t = TYPE_NEXT_VARIANT (t))
880 /* The type qualifiers must (obviously) match up. */
881 if (!TYPE_VOLATILE (t)
882 || (TYPE_READONLY (t) != TYPE_READONLY (type))
883 || (TYPE_RESTRICT (t) != TYPE_RESTRICT (type)))
886 /* For pointer types, the pointees (and hence their TYPE_LANG_SPECIFIC
887 info, if any) must match up. */
888 if (POINTER_TYPE_P (t)
889 && (TREE_TYPE (t) != TREE_TYPE (type)))
892 /* Everything matches up! */
896 /* Ok, we could not re-use any of the pre-existing variants. Create
898 t = build_variant_type_copy (type);
899 TYPE_VOLATILE (t) = 1;
901 /* Set up the canonical type information. */
902 if (TYPE_STRUCTURAL_EQUALITY_P (type))
903 SET_TYPE_STRUCTURAL_EQUALITY (t);
904 else if (TYPE_CANONICAL (type) != type)
905 TYPE_CANONICAL (t) = objc_build_volatilized_type (TYPE_CANONICAL (type));
907 TYPE_CANONICAL (t) = t;
912 /* Mark DECL as being 'volatile' for purposes of Darwin
913 _setjmp()/_longjmp() exception handling. Called from
914 objc_mark_locals_volatile(). */
916 objc_volatilize_decl (tree decl)
918 /* Do not mess with variables that are 'static' or (already)
920 if (!TREE_THIS_VOLATILE (decl) && !TREE_STATIC (decl)
921 && (TREE_CODE (decl) == VAR_DECL
922 || TREE_CODE (decl) == PARM_DECL))
924 tree t = TREE_TYPE (decl);
925 struct volatilized_type key;
928 t = objc_build_volatilized_type (t);
930 loc = htab_find_slot (volatilized_htab, &key, INSERT);
934 *loc = ggc_alloc (sizeof (key));
935 ((struct volatilized_type *) *loc)->type = t;
938 TREE_TYPE (decl) = t;
939 TREE_THIS_VOLATILE (decl) = 1;
940 TREE_SIDE_EFFECTS (decl) = 1;
941 DECL_REGISTER (decl) = 0;
943 C_DECL_REGISTER (decl) = 0;
948 /* Check if protocol PROTO is adopted (directly or indirectly) by class CLS
949 (including its categories and superclasses) or by object type TYP.
950 Issue a warning if PROTO is not adopted anywhere and WARN is set. */
953 objc_lookup_protocol (tree proto, tree cls, tree typ, bool warn)
955 bool class_type = (cls != NULL_TREE);
961 /* Check protocols adopted by the class and its categories. */
962 for (c = cls; c; c = CLASS_CATEGORY_LIST (c))
964 if (lookup_protocol_in_reflist (CLASS_PROTOCOL_LIST (c), proto))
968 /* Repeat for superclasses. */
969 cls = lookup_interface (CLASS_SUPER_NAME (cls));
972 /* Check for any protocols attached directly to the object type. */
973 if (TYPE_HAS_OBJC_INFO (typ))
975 if (lookup_protocol_in_reflist (TYPE_OBJC_PROTOCOL_LIST (typ), proto))
981 strcpy (errbuf, class_type ? "class \'" : "type \'");
982 gen_type_name_0 (class_type ? typ : TYPE_POINTER_TO (typ));
983 strcat (errbuf, "\' does not ");
984 /* NB: Types 'id' and 'Class' cannot reasonably be described as
985 "implementing" a given protocol, since they do not have an
987 strcat (errbuf, class_type ? "implement" : "conform to");
988 strcat (errbuf, " the \'");
989 strcat (errbuf, IDENTIFIER_POINTER (PROTOCOL_NAME (proto)));
990 strcat (errbuf, "\' protocol");
997 /* Check if class RCLS and instance struct type RTYP conform to at least the
998 same protocols that LCLS and LTYP conform to. */
1001 objc_compare_protocols (tree lcls, tree ltyp, tree rcls, tree rtyp, bool warn)
1004 bool have_lproto = false;
1008 /* NB: We do _not_ look at categories defined for LCLS; these may or
1009 may not get loaded in, and therefore it is unreasonable to require
1010 that RCLS/RTYP must implement any of their protocols. */
1011 for (p = CLASS_PROTOCOL_LIST (lcls); p; p = TREE_CHAIN (p))
1015 if (!objc_lookup_protocol (TREE_VALUE (p), rcls, rtyp, warn))
1019 /* Repeat for superclasses. */
1020 lcls = lookup_interface (CLASS_SUPER_NAME (lcls));
1023 /* Check for any protocols attached directly to the object type. */
1024 if (TYPE_HAS_OBJC_INFO (ltyp))
1026 for (p = TYPE_OBJC_PROTOCOL_LIST (ltyp); p; p = TREE_CHAIN (p))
1030 if (!objc_lookup_protocol (TREE_VALUE (p), rcls, rtyp, warn))
1035 /* NB: If LTYP and LCLS have no protocols to search for, return 'true'
1036 vacuously, _unless_ RTYP is a protocol-qualified 'id'. We can get
1037 away with simply checking for 'id' or 'Class' (!RCLS), since this
1038 routine will not get called in other cases. */
1039 return have_lproto || (rcls != NULL_TREE);
1042 /* Determine if it is permissible to assign (if ARGNO is greater than -3)
1043 an instance of RTYP to an instance of LTYP or to compare the two
1044 (if ARGNO is equal to -3), per ObjC type system rules. Before
1045 returning 'true', this routine may issue warnings related to, e.g.,
1046 protocol conformance. When returning 'false', the routine must
1047 produce absolutely no warnings; the C or C++ front-end will do so
1048 instead, if needed. If either LTYP or RTYP is not an Objective-C type,
1049 the routine must return 'false'.
1051 The ARGNO parameter is encoded as follows:
1052 >= 1 Parameter number (CALLEE contains function being called);
1056 -3 Comparison (LTYP and RTYP may match in either direction). */
1059 objc_compare_types (tree ltyp, tree rtyp, int argno, tree callee)
1061 tree lcls, rcls, lproto, rproto;
1062 bool pointers_compatible;
1064 /* We must be dealing with pointer types */
1065 if (!POINTER_TYPE_P (ltyp) || !POINTER_TYPE_P (rtyp))
1070 ltyp = TREE_TYPE (ltyp); /* Remove indirections. */
1071 rtyp = TREE_TYPE (rtyp);
1073 while (POINTER_TYPE_P (ltyp) && POINTER_TYPE_P (rtyp));
1075 /* Past this point, we are only interested in ObjC class instances,
1076 or 'id' or 'Class'. */
1077 if (TREE_CODE (ltyp) != RECORD_TYPE || TREE_CODE (rtyp) != RECORD_TYPE)
1080 if (!objc_is_object_id (ltyp) && !objc_is_class_id (ltyp)
1081 && !TYPE_HAS_OBJC_INFO (ltyp))
1084 if (!objc_is_object_id (rtyp) && !objc_is_class_id (rtyp)
1085 && !TYPE_HAS_OBJC_INFO (rtyp))
1088 /* Past this point, we are committed to returning 'true' to the caller.
1089 However, we can still warn about type and/or protocol mismatches. */
1091 if (TYPE_HAS_OBJC_INFO (ltyp))
1093 lcls = TYPE_OBJC_INTERFACE (ltyp);
1094 lproto = TYPE_OBJC_PROTOCOL_LIST (ltyp);
1097 lcls = lproto = NULL_TREE;
1099 if (TYPE_HAS_OBJC_INFO (rtyp))
1101 rcls = TYPE_OBJC_INTERFACE (rtyp);
1102 rproto = TYPE_OBJC_PROTOCOL_LIST (rtyp);
1105 rcls = rproto = NULL_TREE;
1107 /* If we could not find an @interface declaration, we must have
1108 only seen a @class declaration; for purposes of type comparison,
1109 treat it as a stand-alone (root) class. */
1111 if (lcls && TREE_CODE (lcls) == IDENTIFIER_NODE)
1114 if (rcls && TREE_CODE (rcls) == IDENTIFIER_NODE)
1117 /* If either type is an unqualified 'id', we're done. */
1118 if ((!lproto && objc_is_object_id (ltyp))
1119 || (!rproto && objc_is_object_id (rtyp)))
1122 pointers_compatible = (TYPE_MAIN_VARIANT (ltyp) == TYPE_MAIN_VARIANT (rtyp));
1124 /* If the underlying types are the same, and at most one of them has
1125 a protocol list, we do not need to issue any diagnostics. */
1126 if (pointers_compatible && (!lproto || !rproto))
1129 /* If exactly one of the types is 'Class', issue a diagnostic; any
1130 exceptions of this rule have already been handled. */
1131 if (objc_is_class_id (ltyp) ^ objc_is_class_id (rtyp))
1132 pointers_compatible = false;
1133 /* Otherwise, check for inheritance relations. */
1136 if (!pointers_compatible)
1138 = (objc_is_object_id (ltyp) || objc_is_object_id (rtyp));
1140 if (!pointers_compatible)
1141 pointers_compatible = DERIVED_FROM_P (ltyp, rtyp);
1143 if (!pointers_compatible && argno == -3)
1144 pointers_compatible = DERIVED_FROM_P (rtyp, ltyp);
1147 /* If the pointers match modulo protocols, check for protocol conformance
1149 if (pointers_compatible)
1151 pointers_compatible = objc_compare_protocols (lcls, ltyp, rcls, rtyp,
1154 if (!pointers_compatible && argno == -3)
1155 pointers_compatible = objc_compare_protocols (rcls, rtyp, lcls, ltyp,
1159 if (!pointers_compatible)
1161 /* NB: For the time being, we shall make our warnings look like their
1162 C counterparts. In the future, we may wish to make them more
1167 warning (0, "comparison of distinct Objective-C types lacks a cast");
1171 warning (0, "initialization from distinct Objective-C type");
1175 warning (0, "assignment from distinct Objective-C type");
1179 warning (0, "distinct Objective-C type in return");
1183 warning (0, "passing argument %d of %qE from distinct "
1184 "Objective-C type", argno, callee);
1192 /* Check if LTYP and RTYP have the same type qualifiers. If either type
1193 lives in the volatilized hash table, ignore the 'volatile' bit when
1194 making the comparison. */
1197 objc_type_quals_match (tree ltyp, tree rtyp)
1199 int lquals = TYPE_QUALS (ltyp), rquals = TYPE_QUALS (rtyp);
1200 struct volatilized_type key;
1204 if (htab_find_slot (volatilized_htab, &key, NO_INSERT))
1205 lquals &= ~TYPE_QUAL_VOLATILE;
1209 if (htab_find_slot (volatilized_htab, &key, NO_INSERT))
1210 rquals &= ~TYPE_QUAL_VOLATILE;
1212 return (lquals == rquals);
1216 /* Determine if CHILD is derived from PARENT. The routine assumes that
1217 both parameters are RECORD_TYPEs, and is non-reflexive. */
1220 objc_derived_from_p (tree parent, tree child)
1222 parent = TYPE_MAIN_VARIANT (parent);
1224 for (child = TYPE_MAIN_VARIANT (child);
1225 TYPE_BINFO (child) && BINFO_N_BASE_BINFOS (TYPE_BINFO (child));)
1227 child = TYPE_MAIN_VARIANT (BINFO_TYPE (BINFO_BASE_BINFO
1228 (TYPE_BINFO (child),
1231 if (child == parent)
1240 objc_build_component_ref (tree datum, tree component)
1242 /* If COMPONENT is NULL, the caller is referring to the anonymous
1243 base class field. */
1246 tree base = TYPE_FIELDS (TREE_TYPE (datum));
1248 return build3 (COMPONENT_REF, TREE_TYPE (base), datum, base, NULL_TREE);
1251 /* The 'build_component_ref' routine has been removed from the C++
1252 front-end, but 'finish_class_member_access_expr' seems to be
1253 a worthy substitute. */
1255 return finish_class_member_access_expr (datum, component, false,
1256 tf_warning_or_error);
1258 return build_component_ref (datum, component);
1262 /* Recursively copy inheritance information rooted at BINFO. To do this,
1263 we emulate the song and dance performed by cp/tree.c:copy_binfo(). */
1266 objc_copy_binfo (tree binfo)
1268 tree btype = BINFO_TYPE (binfo);
1269 tree binfo2 = make_tree_binfo (BINFO_N_BASE_BINFOS (binfo));
1273 BINFO_TYPE (binfo2) = btype;
1274 BINFO_OFFSET (binfo2) = BINFO_OFFSET (binfo);
1275 BINFO_BASE_ACCESSES (binfo2) = BINFO_BASE_ACCESSES (binfo);
1277 /* Recursively copy base binfos of BINFO. */
1278 for (ix = 0; BINFO_BASE_ITERATE (binfo, ix, base_binfo); ix++)
1280 tree base_binfo2 = objc_copy_binfo (base_binfo);
1282 BINFO_INHERITANCE_CHAIN (base_binfo2) = binfo2;
1283 BINFO_BASE_APPEND (binfo2, base_binfo2);
1289 /* Record superclass information provided in BASETYPE for ObjC class REF.
1290 This is loosely based on cp/decl.c:xref_basetypes(). */
1293 objc_xref_basetypes (tree ref, tree basetype)
1295 tree binfo = make_tree_binfo (basetype ? 1 : 0);
1297 TYPE_BINFO (ref) = binfo;
1298 BINFO_OFFSET (binfo) = size_zero_node;
1299 BINFO_TYPE (binfo) = ref;
1303 tree base_binfo = objc_copy_binfo (TYPE_BINFO (basetype));
1305 BINFO_INHERITANCE_CHAIN (base_binfo) = binfo;
1306 BINFO_BASE_ACCESSES (binfo) = VEC_alloc (tree, gc, 1);
1307 BINFO_BASE_APPEND (binfo, base_binfo);
1308 BINFO_BASE_ACCESS_APPEND (binfo, access_public_node);
1313 volatilized_hash (const void *ptr)
1315 const_tree const typ = ((const struct volatilized_type *)ptr)->type;
1317 return htab_hash_pointer(typ);
1321 volatilized_eq (const void *ptr1, const void *ptr2)
1323 const_tree const typ1 = ((const struct volatilized_type *)ptr1)->type;
1324 const_tree const typ2 = ((const struct volatilized_type *)ptr2)->type;
1326 return typ1 == typ2;
1329 /* Called from finish_decl. */
1332 objc_check_decl (tree decl)
1334 tree type = TREE_TYPE (decl);
1336 if (TREE_CODE (type) != RECORD_TYPE)
1338 if (OBJC_TYPE_NAME (type) && (type = objc_is_class_name (OBJC_TYPE_NAME (type))))
1339 error ("statically allocated instance of Objective-C class %qs",
1340 IDENTIFIER_POINTER (type));
1343 /* Construct a PROTOCOLS-qualified variant of INTERFACE, where INTERFACE may
1344 either name an Objective-C class, or refer to the special 'id' or 'Class'
1345 types. If INTERFACE is not a valid ObjC type, just return it unchanged. */
1348 objc_get_protocol_qualified_type (tree interface, tree protocols)
1350 /* If INTERFACE is not provided, default to 'id'. */
1351 tree type = (interface ? objc_is_id (interface) : objc_object_type);
1352 bool is_ptr = (type != NULL_TREE);
1356 type = objc_is_class_name (interface);
1359 type = xref_tag (RECORD_TYPE, type);
1366 type = build_variant_type_copy (type);
1368 /* For pointers (i.e., 'id' or 'Class'), attach the protocol(s)
1372 tree orig_pointee_type = TREE_TYPE (type);
1373 TREE_TYPE (type) = build_variant_type_copy (orig_pointee_type);
1375 /* Set up the canonical type information. */
1376 TYPE_CANONICAL (type)
1377 = TYPE_CANONICAL (TYPE_POINTER_TO (orig_pointee_type));
1379 TYPE_POINTER_TO (TREE_TYPE (type)) = type;
1380 type = TREE_TYPE (type);
1383 /* Look up protocols and install in lang specific list. */
1384 DUP_TYPE_OBJC_INFO (type, TYPE_MAIN_VARIANT (type));
1385 TYPE_OBJC_PROTOCOL_LIST (type) = lookup_and_install_protocols (protocols);
1387 /* For RECORD_TYPEs, point to the @interface; for 'id' and 'Class',
1388 return the pointer to the new pointee variant. */
1390 type = TYPE_POINTER_TO (type);
1392 TYPE_OBJC_INTERFACE (type)
1393 = TYPE_OBJC_INTERFACE (TYPE_MAIN_VARIANT (type));
1399 /* Check for circular dependencies in protocols. The arguments are
1400 PROTO, the protocol to check, and LIST, a list of protocol it
1404 check_protocol_recursively (tree proto, tree list)
1408 for (p = list; p; p = TREE_CHAIN (p))
1410 tree pp = TREE_VALUE (p);
1412 if (TREE_CODE (pp) == IDENTIFIER_NODE)
1413 pp = lookup_protocol (pp);
1416 fatal_error ("protocol %qs has circular dependency",
1417 IDENTIFIER_POINTER (PROTOCOL_NAME (pp)));
1419 check_protocol_recursively (proto, PROTOCOL_LIST (pp));
1423 /* Look up PROTOCOLS, and return a list of those that are found.
1424 If none are found, return NULL. */
1427 lookup_and_install_protocols (tree protocols)
1430 tree return_value = NULL_TREE;
1432 for (proto = protocols; proto; proto = TREE_CHAIN (proto))
1434 tree ident = TREE_VALUE (proto);
1435 tree p = lookup_protocol (ident);
1438 return_value = chainon (return_value,
1439 build_tree_list (NULL_TREE, p));
1440 else if (ident != error_mark_node)
1441 error ("cannot find protocol declaration for %qs",
1442 IDENTIFIER_POINTER (ident));
1445 return return_value;
1448 /* Create a declaration for field NAME of a given TYPE. */
1451 create_field_decl (tree type, const char *name)
1453 return build_decl (FIELD_DECL, get_identifier (name), type);
1456 /* Create a global, static declaration for variable NAME of a given TYPE. The
1457 finish_var_decl() routine will need to be called on it afterwards. */
1460 start_var_decl (tree type, const char *name)
1462 tree var = build_decl (VAR_DECL, get_identifier (name), type);
1464 TREE_STATIC (var) = 1;
1465 DECL_INITIAL (var) = error_mark_node; /* A real initializer is coming... */
1466 DECL_IGNORED_P (var) = 1;
1467 DECL_ARTIFICIAL (var) = 1;
1468 DECL_CONTEXT (var) = NULL_TREE;
1470 DECL_THIS_STATIC (var) = 1; /* squash redeclaration errors */
1476 /* Finish off the variable declaration created by start_var_decl(). */
1479 finish_var_decl (tree var, tree initializer)
1481 finish_decl (var, initializer, NULL_TREE);
1482 /* Ensure that the variable actually gets output. */
1483 mark_decl_referenced (var);
1484 /* Mark the decl to avoid "defined but not used" warning. */
1485 TREE_USED (var) = 1;
1488 /* Find the decl for the constant string class reference. This is only
1489 used for the NeXT runtime. */
1492 setup_string_decl (void)
1497 /* %s in format will provide room for terminating null */
1498 length = strlen (STRING_OBJECT_GLOBAL_FORMAT)
1499 + strlen (constant_string_class_name);
1500 name = XNEWVEC (char, length);
1501 sprintf (name, STRING_OBJECT_GLOBAL_FORMAT,
1502 constant_string_class_name);
1503 constant_string_global_id = get_identifier (name);
1504 string_class_decl = lookup_name (constant_string_global_id);
1506 return string_class_decl;
1509 /* Purpose: "play" parser, creating/installing representations
1510 of the declarations that are required by Objective-C.
1514 type_spec--------->sc_spec
1515 (tree_list) (tree_list)
1518 identifier_node identifier_node */
1521 synth_module_prologue (void)
1524 enum debug_info_type save_write_symbols = write_symbols;
1525 const struct gcc_debug_hooks *const save_hooks = debug_hooks;
1527 /* Suppress outputting debug symbols, because
1528 dbxout_init hasn't been called yet. */
1529 write_symbols = NO_DEBUG;
1530 debug_hooks = &do_nothing_debug_hooks;
1533 push_lang_context (lang_name_c); /* extern "C" */
1536 /* The following are also defined in <objc/objc.h> and friends. */
1538 objc_object_id = get_identifier (TAG_OBJECT);
1539 objc_class_id = get_identifier (TAG_CLASS);
1541 objc_object_reference = xref_tag (RECORD_TYPE, objc_object_id);
1542 objc_class_reference = xref_tag (RECORD_TYPE, objc_class_id);
1544 objc_object_type = build_pointer_type (objc_object_reference);
1545 objc_class_type = build_pointer_type (objc_class_reference);
1547 objc_object_name = get_identifier (OBJECT_TYPEDEF_NAME);
1548 objc_class_name = get_identifier (CLASS_TYPEDEF_NAME);
1550 /* Declare the 'id' and 'Class' typedefs. */
1552 type = lang_hooks.decls.pushdecl (build_decl (TYPE_DECL,
1555 TREE_NO_WARNING (type) = 1;
1556 type = lang_hooks.decls.pushdecl (build_decl (TYPE_DECL,
1559 TREE_NO_WARNING (type) = 1;
1561 /* Forward-declare '@interface Protocol'. */
1563 type = get_identifier (PROTOCOL_OBJECT_CLASS_NAME);
1564 objc_declare_class (tree_cons (NULL_TREE, type, NULL_TREE));
1565 objc_protocol_type = build_pointer_type (xref_tag (RECORD_TYPE,
1568 /* Declare type of selector-objects that represent an operation name. */
1570 if (flag_next_runtime)
1571 /* `struct objc_selector *' */
1573 = build_pointer_type (xref_tag (RECORD_TYPE,
1574 get_identifier (TAG_SELECTOR)));
1576 /* `const struct objc_selector *' */
1578 = build_pointer_type
1579 (build_qualified_type (xref_tag (RECORD_TYPE,
1580 get_identifier (TAG_SELECTOR)),
1583 /* Declare receiver type used for dispatching messages to 'super'. */
1585 /* `struct objc_super *' */
1586 objc_super_type = build_pointer_type (xref_tag (RECORD_TYPE,
1587 get_identifier (TAG_SUPER)));
1589 /* Declare pointers to method and ivar lists. */
1590 objc_method_list_ptr = build_pointer_type
1591 (xref_tag (RECORD_TYPE,
1592 get_identifier (UTAG_METHOD_LIST)));
1593 objc_method_proto_list_ptr
1594 = build_pointer_type (xref_tag (RECORD_TYPE,
1595 get_identifier (UTAG_METHOD_PROTOTYPE_LIST)));
1596 objc_ivar_list_ptr = build_pointer_type
1597 (xref_tag (RECORD_TYPE,
1598 get_identifier (UTAG_IVAR_LIST)));
1600 /* TREE_NOTHROW is cleared for the message-sending functions,
1601 because the function that gets called can throw in Obj-C++, or
1602 could itself call something that can throw even in Obj-C. */
1604 if (flag_next_runtime)
1606 /* NB: In order to call one of the ..._stret (struct-returning)
1607 functions, the function *MUST* first be cast to a signature that
1608 corresponds to the actual ObjC method being invoked. This is
1609 what is done by the build_objc_method_call() routine below. */
1611 /* id objc_msgSend (id, SEL, ...); */
1612 /* id objc_msgSendNonNil (id, SEL, ...); */
1613 /* id objc_msgSend_stret (id, SEL, ...); */
1614 /* id objc_msgSendNonNil_stret (id, SEL, ...); */
1616 = build_function_type (objc_object_type,
1617 tree_cons (NULL_TREE, objc_object_type,
1618 tree_cons (NULL_TREE, objc_selector_type,
1620 umsg_decl = add_builtin_function (TAG_MSGSEND,
1621 type, 0, NOT_BUILT_IN,
1623 umsg_nonnil_decl = add_builtin_function (TAG_MSGSEND_NONNIL,
1624 type, 0, NOT_BUILT_IN,
1626 umsg_stret_decl = add_builtin_function (TAG_MSGSEND_STRET,
1627 type, 0, NOT_BUILT_IN,
1629 umsg_nonnil_stret_decl = add_builtin_function (TAG_MSGSEND_NONNIL_STRET,
1630 type, 0, NOT_BUILT_IN,
1633 /* These can throw, because the function that gets called can throw
1634 in Obj-C++, or could itself call something that can throw even
1636 TREE_NOTHROW (umsg_decl) = 0;
1637 TREE_NOTHROW (umsg_nonnil_decl) = 0;
1638 TREE_NOTHROW (umsg_stret_decl) = 0;
1639 TREE_NOTHROW (umsg_nonnil_stret_decl) = 0;
1641 /* id objc_msgSend_Fast (id, SEL, ...)
1642 __attribute__ ((hard_coded_address (OFFS_MSGSEND_FAST))); */
1643 #ifdef OFFS_MSGSEND_FAST
1644 umsg_fast_decl = add_builtin_function (TAG_MSGSEND_FAST,
1645 type, 0, NOT_BUILT_IN,
1647 TREE_NOTHROW (umsg_fast_decl) = 0;
1648 DECL_ATTRIBUTES (umsg_fast_decl)
1649 = tree_cons (get_identifier ("hard_coded_address"),
1650 build_int_cst (NULL_TREE, OFFS_MSGSEND_FAST),
1653 /* No direct dispatch available. */
1654 umsg_fast_decl = umsg_decl;
1657 /* id objc_msgSendSuper (struct objc_super *, SEL, ...); */
1658 /* id objc_msgSendSuper_stret (struct objc_super *, SEL, ...); */
1660 = build_function_type (objc_object_type,
1661 tree_cons (NULL_TREE, objc_super_type,
1662 tree_cons (NULL_TREE, objc_selector_type,
1664 umsg_super_decl = add_builtin_function (TAG_MSGSENDSUPER,
1665 type, 0, NOT_BUILT_IN,
1667 umsg_super_stret_decl = add_builtin_function (TAG_MSGSENDSUPER_STRET,
1668 type, 0, NOT_BUILT_IN, 0,
1670 TREE_NOTHROW (umsg_super_decl) = 0;
1671 TREE_NOTHROW (umsg_super_stret_decl) = 0;
1675 /* GNU runtime messenger entry points. */
1677 /* typedef id (*IMP)(id, SEL, ...); */
1679 = build_pointer_type
1680 (build_function_type (objc_object_type,
1681 tree_cons (NULL_TREE, objc_object_type,
1682 tree_cons (NULL_TREE, objc_selector_type,
1685 /* IMP objc_msg_lookup (id, SEL); */
1687 = build_function_type (IMP_type,
1688 tree_cons (NULL_TREE, objc_object_type,
1689 tree_cons (NULL_TREE, objc_selector_type,
1690 OBJC_VOID_AT_END)));
1691 umsg_decl = add_builtin_function (TAG_MSGSEND,
1692 type, 0, NOT_BUILT_IN,
1694 TREE_NOTHROW (umsg_decl) = 0;
1696 /* IMP objc_msg_lookup_super (struct objc_super *, SEL); */
1698 = build_function_type (IMP_type,
1699 tree_cons (NULL_TREE, objc_super_type,
1700 tree_cons (NULL_TREE, objc_selector_type,
1701 OBJC_VOID_AT_END)));
1702 umsg_super_decl = add_builtin_function (TAG_MSGSENDSUPER,
1703 type, 0, NOT_BUILT_IN,
1705 TREE_NOTHROW (umsg_super_decl) = 0;
1707 /* The following GNU runtime entry point is called to initialize
1710 __objc_exec_class (void *); */
1712 = build_function_type (void_type_node,
1713 tree_cons (NULL_TREE, ptr_type_node,
1715 execclass_decl = add_builtin_function (TAG_EXECCLASS,
1716 type, 0, NOT_BUILT_IN,
1720 /* id objc_getClass (const char *); */
1722 type = build_function_type (objc_object_type,
1723 tree_cons (NULL_TREE,
1724 const_string_type_node,
1728 = add_builtin_function (TAG_GETCLASS, type, 0, NOT_BUILT_IN,
1731 /* id objc_getMetaClass (const char *); */
1733 objc_get_meta_class_decl
1734 = add_builtin_function (TAG_GETMETACLASS, type, 0, NOT_BUILT_IN, NULL, NULL_TREE);
1736 build_class_template ();
1737 build_super_template ();
1738 build_protocol_template ();
1739 build_category_template ();
1740 build_objc_exception_stuff ();
1742 if (flag_next_runtime)
1743 build_next_objc_exception_stuff ();
1745 /* static SEL _OBJC_SELECTOR_TABLE[]; */
1747 if (! flag_next_runtime)
1748 build_selector_table_decl ();
1750 /* Forward declare constant_string_id and constant_string_type. */
1751 if (!constant_string_class_name)
1752 constant_string_class_name = default_constant_string_class_name;
1754 constant_string_id = get_identifier (constant_string_class_name);
1755 objc_declare_class (tree_cons (NULL_TREE, constant_string_id, NULL_TREE));
1757 /* Pre-build the following entities - for speed/convenience. */
1758 self_id = get_identifier ("self");
1759 ucmd_id = get_identifier ("_cmd");
1762 pop_lang_context ();
1765 write_symbols = save_write_symbols;
1766 debug_hooks = save_hooks;
1769 /* Ensure that the ivar list for NSConstantString/NXConstantString
1770 (or whatever was specified via `-fconstant-string-class')
1771 contains fields at least as large as the following three, so that
1772 the runtime can stomp on them with confidence:
1774 struct STRING_OBJECT_CLASS_NAME
1778 unsigned int length;
1782 check_string_class_template (void)
1784 tree field_decl = objc_get_class_ivars (constant_string_id);
1786 #define AT_LEAST_AS_LARGE_AS(F, T) \
1787 (F && TREE_CODE (F) == FIELD_DECL \
1788 && (TREE_INT_CST_LOW (TYPE_SIZE (TREE_TYPE (F))) \
1789 >= TREE_INT_CST_LOW (TYPE_SIZE (T))))
1791 if (!AT_LEAST_AS_LARGE_AS (field_decl, ptr_type_node))
1794 field_decl = TREE_CHAIN (field_decl);
1795 if (!AT_LEAST_AS_LARGE_AS (field_decl, ptr_type_node))
1798 field_decl = TREE_CHAIN (field_decl);
1799 return AT_LEAST_AS_LARGE_AS (field_decl, unsigned_type_node);
1801 #undef AT_LEAST_AS_LARGE_AS
1804 /* Avoid calling `check_string_class_template ()' more than once. */
1805 static GTY(()) int string_layout_checked;
1807 /* Construct an internal string layout to be used as a template for
1808 creating NSConstantString/NXConstantString instances. */
1811 objc_build_internal_const_str_type (void)
1813 tree type = (*lang_hooks.types.make_type) (RECORD_TYPE);
1814 tree fields = build_decl (FIELD_DECL, NULL_TREE, ptr_type_node);
1815 tree field = build_decl (FIELD_DECL, NULL_TREE, ptr_type_node);
1817 TREE_CHAIN (field) = fields; fields = field;
1818 field = build_decl (FIELD_DECL, NULL_TREE, unsigned_type_node);
1819 TREE_CHAIN (field) = fields; fields = field;
1820 /* NB: The finish_builtin_struct() routine expects FIELD_DECLs in
1822 finish_builtin_struct (type, "__builtin_ObjCString",
1828 /* Custom build_string which sets TREE_TYPE! */
1831 my_build_string (int len, const char *str)
1833 return fix_string_type (build_string (len, str));
1836 /* Build a string with contents STR and length LEN and convert it to a
1840 my_build_string_pointer (int len, const char *str)
1842 tree string = my_build_string (len, str);
1843 tree ptrtype = build_pointer_type (TREE_TYPE (TREE_TYPE (string)));
1844 return build1 (ADDR_EXPR, ptrtype, string);
1848 string_hash (const void *ptr)
1850 const_tree const str = ((const struct string_descriptor *)ptr)->literal;
1851 const unsigned char *p = (const unsigned char *) TREE_STRING_POINTER (str);
1852 int i, len = TREE_STRING_LENGTH (str);
1855 for (i = 0; i < len; i++)
1856 h = ((h * 613) + p[i]);
1862 string_eq (const void *ptr1, const void *ptr2)
1864 const_tree const str1 = ((const struct string_descriptor *)ptr1)->literal;
1865 const_tree const str2 = ((const struct string_descriptor *)ptr2)->literal;
1866 int len1 = TREE_STRING_LENGTH (str1);
1868 return (len1 == TREE_STRING_LENGTH (str2)
1869 && !memcmp (TREE_STRING_POINTER (str1), TREE_STRING_POINTER (str2),
1873 /* Given a chain of STRING_CST's, build a static instance of
1874 NXConstantString which points at the concatenation of those
1875 strings. We place the string object in the __string_objects
1876 section of the __OBJC segment. The Objective-C runtime will
1877 initialize the isa pointers of the string objects to point at the
1878 NXConstantString class object. */
1881 objc_build_string_object (tree string)
1883 tree initlist, constructor, constant_string_class;
1886 struct string_descriptor *desc, key;
1889 /* Prep the string argument. */
1890 string = fix_string_type (string);
1891 TREE_SET_CODE (string, STRING_CST);
1892 length = TREE_STRING_LENGTH (string) - 1;
1894 /* Check whether the string class being used actually exists and has the
1895 correct ivar layout. */
1896 if (!string_layout_checked)
1898 string_layout_checked = -1;
1899 constant_string_class = lookup_interface (constant_string_id);
1900 internal_const_str_type = objc_build_internal_const_str_type ();
1902 if (!constant_string_class
1903 || !(constant_string_type
1904 = CLASS_STATIC_TEMPLATE (constant_string_class)))
1905 error ("cannot find interface declaration for %qs",
1906 IDENTIFIER_POINTER (constant_string_id));
1907 /* The NSConstantString/NXConstantString ivar layout is now known. */
1908 else if (!check_string_class_template ())
1909 error ("interface %qs does not have valid constant string layout",
1910 IDENTIFIER_POINTER (constant_string_id));
1911 /* For the NeXT runtime, we can generate a literal reference
1912 to the string class, don't need to run a constructor. */
1913 else if (flag_next_runtime && !setup_string_decl ())
1914 error ("cannot find reference tag for class %qs",
1915 IDENTIFIER_POINTER (constant_string_id));
1918 string_layout_checked = 1; /* Success! */
1919 add_class_reference (constant_string_id);
1923 if (string_layout_checked == -1)
1924 return error_mark_node;
1926 /* Perhaps we already constructed a constant string just like this one? */
1927 key.literal = string;
1928 loc = htab_find_slot (string_htab, &key, INSERT);
1929 desc = (struct string_descriptor *) *loc;
1934 *loc = desc = GGC_NEW (struct string_descriptor);
1935 desc->literal = string;
1937 /* GNU: (NXConstantString *) & ((__builtin_ObjCString) { NULL, string, length }) */
1938 /* NeXT: (NSConstantString *) & ((__builtin_ObjCString) { isa, string, length }) */
1939 fields = TYPE_FIELDS (internal_const_str_type);
1941 = build_tree_list (fields,
1943 ? build_unary_op (ADDR_EXPR, string_class_decl, 0)
1944 : build_int_cst (NULL_TREE, 0));
1945 fields = TREE_CHAIN (fields);
1946 initlist = tree_cons (fields, build_unary_op (ADDR_EXPR, string, 1),
1948 fields = TREE_CHAIN (fields);
1949 initlist = tree_cons (fields, build_int_cst (NULL_TREE, length),
1951 constructor = objc_build_constructor (internal_const_str_type,
1952 nreverse (initlist));
1954 if (!flag_next_runtime)
1956 = objc_add_static_instance (constructor, constant_string_type);
1959 var = build_decl (CONST_DECL, NULL, TREE_TYPE (constructor));
1960 DECL_INITIAL (var) = constructor;
1961 TREE_STATIC (var) = 1;
1962 pushdecl_top_level (var);
1965 desc->constructor = constructor;
1968 addr = convert (build_pointer_type (constant_string_type),
1969 build_unary_op (ADDR_EXPR, desc->constructor, 1));
1974 /* Declare a static instance of CLASS_DECL initialized by CONSTRUCTOR. */
1976 static GTY(()) int num_static_inst;
1979 objc_add_static_instance (tree constructor, tree class_decl)
1984 /* Find the list of static instances for the CLASS_DECL. Create one if
1986 for (chain = &objc_static_instances;
1987 *chain && TREE_VALUE (*chain) != class_decl;
1988 chain = &TREE_CHAIN (*chain));
1991 *chain = tree_cons (NULL_TREE, class_decl, NULL_TREE);
1992 add_objc_string (OBJC_TYPE_NAME (class_decl), class_names);
1995 sprintf (buf, "_OBJC_INSTANCE_%d", num_static_inst++);
1996 decl = build_decl (VAR_DECL, get_identifier (buf), class_decl);
1997 DECL_COMMON (decl) = 1;
1998 TREE_STATIC (decl) = 1;
1999 DECL_ARTIFICIAL (decl) = 1;
2000 TREE_USED (decl) = 1;
2001 DECL_INITIAL (decl) = constructor;
2003 /* We may be writing something else just now.
2004 Postpone till end of input. */
2005 DECL_DEFER_OUTPUT (decl) = 1;
2006 pushdecl_top_level (decl);
2007 rest_of_decl_compilation (decl, 1, 0);
2009 /* Add the DECL to the head of this CLASS' list. */
2010 TREE_PURPOSE (*chain) = tree_cons (NULL_TREE, decl, TREE_PURPOSE (*chain));
2015 /* Build a static constant CONSTRUCTOR
2016 with type TYPE and elements ELTS. */
2019 objc_build_constructor (tree type, tree elts)
2021 tree constructor = build_constructor_from_list (type, elts);
2023 TREE_CONSTANT (constructor) = 1;
2024 TREE_STATIC (constructor) = 1;
2025 TREE_READONLY (constructor) = 1;
2028 /* Adjust for impedance mismatch. We should figure out how to build
2029 CONSTRUCTORs that consistently please both the C and C++ gods. */
2030 if (!TREE_PURPOSE (elts))
2031 TREE_TYPE (constructor) = init_list_type_node;
2037 /* Take care of defining and initializing _OBJC_SYMBOLS. */
2039 /* Predefine the following data type:
2047 void *defs[cls_def_cnt + cat_def_cnt];
2051 build_objc_symtab_template (void)
2053 tree field_decl, field_decl_chain;
2055 objc_symtab_template
2056 = start_struct (RECORD_TYPE, get_identifier (UTAG_SYMTAB));
2058 /* long sel_ref_cnt; */
2059 field_decl = create_field_decl (long_integer_type_node, "sel_ref_cnt");
2060 field_decl_chain = field_decl;
2063 field_decl = create_field_decl (build_pointer_type (objc_selector_type),
2065 chainon (field_decl_chain, field_decl);
2067 /* short cls_def_cnt; */
2068 field_decl = create_field_decl (short_integer_type_node, "cls_def_cnt");
2069 chainon (field_decl_chain, field_decl);
2071 /* short cat_def_cnt; */
2072 field_decl = create_field_decl (short_integer_type_node,
2074 chainon (field_decl_chain, field_decl);
2076 if (imp_count || cat_count || !flag_next_runtime)
2078 /* void *defs[imp_count + cat_count (+ 1)]; */
2079 /* NB: The index is one less than the size of the array. */
2080 int index = imp_count + cat_count
2081 + (flag_next_runtime? -1: 0);
2082 field_decl = create_field_decl
2085 build_index_type (build_int_cst (NULL_TREE, index))),
2087 chainon (field_decl_chain, field_decl);
2090 finish_struct (objc_symtab_template, field_decl_chain, NULL_TREE);
2093 /* Create the initial value for the `defs' field of _objc_symtab.
2094 This is a CONSTRUCTOR. */
2097 init_def_list (tree type)
2099 tree expr, initlist = NULL_TREE;
2100 struct imp_entry *impent;
2103 for (impent = imp_list; impent; impent = impent->next)
2105 if (TREE_CODE (impent->imp_context) == CLASS_IMPLEMENTATION_TYPE)
2107 expr = build_unary_op (ADDR_EXPR, impent->class_decl, 0);
2108 initlist = tree_cons (NULL_TREE, expr, initlist);
2113 for (impent = imp_list; impent; impent = impent->next)
2115 if (TREE_CODE (impent->imp_context) == CATEGORY_IMPLEMENTATION_TYPE)
2117 expr = build_unary_op (ADDR_EXPR, impent->class_decl, 0);
2118 initlist = tree_cons (NULL_TREE, expr, initlist);
2122 if (!flag_next_runtime)
2124 /* statics = { ..., _OBJC_STATIC_INSTANCES, ... } */
2127 if (static_instances_decl)
2128 expr = build_unary_op (ADDR_EXPR, static_instances_decl, 0);
2130 expr = build_int_cst (NULL_TREE, 0);
2132 initlist = tree_cons (NULL_TREE, expr, initlist);
2135 return objc_build_constructor (type, nreverse (initlist));
2138 /* Construct the initial value for all of _objc_symtab. */
2141 init_objc_symtab (tree type)
2145 /* sel_ref_cnt = { ..., 5, ... } */
2147 initlist = build_tree_list (NULL_TREE,
2148 build_int_cst (long_integer_type_node, 0));
2150 /* refs = { ..., _OBJC_SELECTOR_TABLE, ... } */
2152 if (flag_next_runtime || ! sel_ref_chain)
2153 initlist = tree_cons (NULL_TREE, build_int_cst (NULL_TREE, 0), initlist);
2156 = tree_cons (NULL_TREE,
2157 convert (build_pointer_type (objc_selector_type),
2158 build_unary_op (ADDR_EXPR,
2159 UOBJC_SELECTOR_TABLE_decl, 1)),
2162 /* cls_def_cnt = { ..., 5, ... } */
2164 initlist = tree_cons (NULL_TREE, build_int_cst (NULL_TREE, imp_count), initlist);
2166 /* cat_def_cnt = { ..., 5, ... } */
2168 initlist = tree_cons (NULL_TREE, build_int_cst (NULL_TREE, cat_count), initlist);
2170 /* cls_def = { ..., { &Foo, &Bar, ...}, ... } */
2172 if (imp_count || cat_count || !flag_next_runtime)
2175 tree field = TYPE_FIELDS (type);
2176 field = TREE_CHAIN (TREE_CHAIN (TREE_CHAIN (TREE_CHAIN (field))));
2178 initlist = tree_cons (NULL_TREE, init_def_list (TREE_TYPE (field)),
2182 return objc_build_constructor (type, nreverse (initlist));
2185 /* Generate forward declarations for metadata such as
2186 'OBJC_CLASS_...'. */
2189 build_metadata_decl (const char *name, tree type)
2193 /* struct TYPE NAME_<name>; */
2194 decl = start_var_decl (type, synth_id_with_class_suffix
2196 objc_implementation_context));
2201 /* Push forward-declarations of all the categories so that
2202 init_def_list can use them in a CONSTRUCTOR. */
2205 forward_declare_categories (void)
2207 struct imp_entry *impent;
2208 tree sav = objc_implementation_context;
2210 for (impent = imp_list; impent; impent = impent->next)
2212 if (TREE_CODE (impent->imp_context) == CATEGORY_IMPLEMENTATION_TYPE)
2214 /* Set an invisible arg to synth_id_with_class_suffix. */
2215 objc_implementation_context = impent->imp_context;
2216 /* extern struct objc_category _OBJC_CATEGORY_<name>; */
2217 impent->class_decl = build_metadata_decl ("_OBJC_CATEGORY",
2218 objc_category_template);
2221 objc_implementation_context = sav;
2224 /* Create the declaration of _OBJC_SYMBOLS, with type `struct _objc_symtab'
2225 and initialized appropriately. */
2228 generate_objc_symtab_decl (void)
2230 /* forward declare categories */
2232 forward_declare_categories ();
2234 build_objc_symtab_template ();
2235 UOBJC_SYMBOLS_decl = start_var_decl (objc_symtab_template, "_OBJC_SYMBOLS");
2236 finish_var_decl (UOBJC_SYMBOLS_decl,
2237 init_objc_symtab (TREE_TYPE (UOBJC_SYMBOLS_decl)));
2241 init_module_descriptor (tree type)
2243 tree initlist, expr;
2245 /* version = { 1, ... } */
2247 expr = build_int_cst (long_integer_type_node, OBJC_VERSION);
2248 initlist = build_tree_list (NULL_TREE, expr);
2250 /* size = { ..., sizeof (struct _objc_module), ... } */
2252 expr = convert (long_integer_type_node,
2253 size_in_bytes (objc_module_template));
2254 initlist = tree_cons (NULL_TREE, expr, initlist);
2256 /* Don't provide any file name for security reasons. */
2257 /* name = { ..., "", ... } */
2259 expr = add_objc_string (get_identifier (""), class_names);
2260 initlist = tree_cons (NULL_TREE, expr, initlist);
2262 /* symtab = { ..., _OBJC_SYMBOLS, ... } */
2264 if (UOBJC_SYMBOLS_decl)
2265 expr = build_unary_op (ADDR_EXPR, UOBJC_SYMBOLS_decl, 0);
2267 expr = build_int_cst (NULL_TREE, 0);
2268 initlist = tree_cons (NULL_TREE, expr, initlist);
2270 return objc_build_constructor (type, nreverse (initlist));
2273 /* Write out the data structures to describe Objective C classes defined.
2275 struct _objc_module { ... } _OBJC_MODULE = { ... }; */
2278 build_module_descriptor (void)
2280 tree field_decl, field_decl_chain;
2283 push_lang_context (lang_name_c); /* extern "C" */
2286 objc_module_template
2287 = start_struct (RECORD_TYPE, get_identifier (UTAG_MODULE));
2290 field_decl = create_field_decl (long_integer_type_node, "version");
2291 field_decl_chain = field_decl;
2294 field_decl = create_field_decl (long_integer_type_node, "size");
2295 chainon (field_decl_chain, field_decl);
2298 field_decl = create_field_decl (string_type_node, "name");
2299 chainon (field_decl_chain, field_decl);
2301 /* struct _objc_symtab *symtab; */
2303 = create_field_decl (build_pointer_type
2304 (xref_tag (RECORD_TYPE,
2305 get_identifier (UTAG_SYMTAB))),
2307 chainon (field_decl_chain, field_decl);
2309 finish_struct (objc_module_template, field_decl_chain, NULL_TREE);
2311 /* Create an instance of "_objc_module". */
2312 UOBJC_MODULES_decl = start_var_decl (objc_module_template, "_OBJC_MODULES");
2313 finish_var_decl (UOBJC_MODULES_decl,
2314 init_module_descriptor (TREE_TYPE (UOBJC_MODULES_decl)));
2317 pop_lang_context ();
2321 /* The GNU runtime requires us to provide a static initializer function
2324 static void __objc_gnu_init (void) {
2325 __objc_exec_class (&L_OBJC_MODULES);
2329 build_module_initializer_routine (void)
2334 push_lang_context (lang_name_c); /* extern "C" */
2337 objc_push_parm (build_decl (PARM_DECL, NULL_TREE, void_type_node));
2338 objc_start_function (get_identifier (TAG_GNUINIT),
2339 build_function_type (void_type_node,
2341 NULL_TREE, objc_get_parm_info (0));
2343 body = c_begin_compound_stmt (true);
2344 add_stmt (build_function_call
2348 build_unary_op (ADDR_EXPR,
2349 UOBJC_MODULES_decl, 0))));
2350 add_stmt (c_end_compound_stmt (body, true));
2352 TREE_PUBLIC (current_function_decl) = 0;
2355 /* For Objective-C++, we will need to call __objc_gnu_init
2356 from objc_generate_static_init_call() below. */
2357 DECL_STATIC_CONSTRUCTOR (current_function_decl) = 1;
2360 GNU_INIT_decl = current_function_decl;
2364 pop_lang_context ();
2369 /* Return 1 if the __objc_gnu_init function has been synthesized and needs
2370 to be called by the module initializer routine. */
2373 objc_static_init_needed_p (void)
2375 return (GNU_INIT_decl != NULL_TREE);
2378 /* Generate a call to the __objc_gnu_init initializer function. */
2381 objc_generate_static_init_call (tree ctors ATTRIBUTE_UNUSED)
2383 add_stmt (build_stmt (EXPR_STMT,
2384 build_function_call (GNU_INIT_decl, NULL_TREE)));
2388 #endif /* OBJCPLUS */
2390 /* Return the DECL of the string IDENT in the SECTION. */
2393 get_objc_string_decl (tree ident, enum string_section section)
2397 if (section == class_names)
2398 chain = class_names_chain;
2399 else if (section == meth_var_names)
2400 chain = meth_var_names_chain;
2401 else if (section == meth_var_types)
2402 chain = meth_var_types_chain;
2406 for (; chain != 0; chain = TREE_CHAIN (chain))
2407 if (TREE_VALUE (chain) == ident)
2408 return (TREE_PURPOSE (chain));
2414 /* Output references to all statically allocated objects. Return the DECL
2415 for the array built. */
2418 generate_static_references (void)
2420 tree decls = NULL_TREE, expr = NULL_TREE;
2421 tree class_name, klass, decl, initlist;
2422 tree cl_chain, in_chain, type
2423 = build_array_type (build_pointer_type (void_type_node), NULL_TREE);
2424 int num_inst, num_class;
2427 if (flag_next_runtime)
2430 for (cl_chain = objc_static_instances, num_class = 0;
2431 cl_chain; cl_chain = TREE_CHAIN (cl_chain), num_class++)
2433 for (num_inst = 0, in_chain = TREE_PURPOSE (cl_chain);
2434 in_chain; num_inst++, in_chain = TREE_CHAIN (in_chain));
2436 sprintf (buf, "_OBJC_STATIC_INSTANCES_%d", num_class);
2437 decl = start_var_decl (type, buf);
2439 /* Output {class_name, ...}. */
2440 klass = TREE_VALUE (cl_chain);
2441 class_name = get_objc_string_decl (OBJC_TYPE_NAME (klass), class_names);
2442 initlist = build_tree_list (NULL_TREE,
2443 build_unary_op (ADDR_EXPR, class_name, 1));
2445 /* Output {..., instance, ...}. */
2446 for (in_chain = TREE_PURPOSE (cl_chain);
2447 in_chain; in_chain = TREE_CHAIN (in_chain))
2449 expr = build_unary_op (ADDR_EXPR, TREE_VALUE (in_chain), 1);
2450 initlist = tree_cons (NULL_TREE, expr, initlist);
2453 /* Output {..., NULL}. */
2454 initlist = tree_cons (NULL_TREE, build_int_cst (NULL_TREE, 0), initlist);
2456 expr = objc_build_constructor (TREE_TYPE (decl), nreverse (initlist));
2457 finish_var_decl (decl, expr);
2459 = tree_cons (NULL_TREE, build_unary_op (ADDR_EXPR, decl, 1), decls);
2462 decls = tree_cons (NULL_TREE, build_int_cst (NULL_TREE, 0), decls);
2463 expr = objc_build_constructor (type, nreverse (decls));
2464 static_instances_decl = start_var_decl (type, "_OBJC_STATIC_INSTANCES");
2465 finish_var_decl (static_instances_decl, expr);
2468 static GTY(()) int selector_reference_idx;
2471 build_selector_reference_decl (void)
2476 sprintf (buf, "_OBJC_SELECTOR_REFERENCES_%d", selector_reference_idx++);
2477 decl = start_var_decl (objc_selector_type, buf);
2483 build_selector_table_decl (void)
2487 if (flag_typed_selectors)
2489 build_selector_template ();
2490 temp = build_array_type (objc_selector_template, NULL_TREE);
2493 temp = build_array_type (objc_selector_type, NULL_TREE);
2495 UOBJC_SELECTOR_TABLE_decl = start_var_decl (temp, "_OBJC_SELECTOR_TABLE");
2498 /* Just a handy wrapper for add_objc_string. */
2501 build_selector (tree ident)
2503 return convert (objc_selector_type,
2504 add_objc_string (ident, meth_var_names));
2508 build_selector_translation_table (void)
2510 tree chain, initlist = NULL_TREE;
2512 tree decl = NULL_TREE;
2514 for (chain = sel_ref_chain; chain; chain = TREE_CHAIN (chain))
2518 if (warn_selector && objc_implementation_context)
2522 for (method_chain = meth_var_names_chain;
2524 method_chain = TREE_CHAIN (method_chain))
2526 if (TREE_VALUE (method_chain) == TREE_VALUE (chain))
2535 if (flag_next_runtime && TREE_PURPOSE (chain))
2536 loc = &DECL_SOURCE_LOCATION (TREE_PURPOSE (chain));
2538 loc = &input_location;
2539 warning (0, "%Hcreating selector for nonexistent method %qE",
2540 loc, TREE_VALUE (chain));
2544 expr = build_selector (TREE_VALUE (chain));
2545 /* add one for the '\0' character */
2546 offset += IDENTIFIER_LENGTH (TREE_VALUE (chain)) + 1;
2548 if (flag_next_runtime)
2550 decl = TREE_PURPOSE (chain);
2551 finish_var_decl (decl, expr);
2555 if (flag_typed_selectors)
2557 tree eltlist = NULL_TREE;
2558 tree encoding = get_proto_encoding (TREE_PURPOSE (chain));
2559 eltlist = tree_cons (NULL_TREE, expr, NULL_TREE);
2560 eltlist = tree_cons (NULL_TREE, encoding, eltlist);
2561 expr = objc_build_constructor (objc_selector_template,
2562 nreverse (eltlist));
2565 initlist = tree_cons (NULL_TREE, expr, initlist);
2569 if (! flag_next_runtime)
2571 /* Cause the selector table (previously forward-declared)
2572 to be actually output. */
2573 initlist = tree_cons (NULL_TREE,
2574 flag_typed_selectors
2575 ? objc_build_constructor
2576 (objc_selector_template,
2577 tree_cons (NULL_TREE,
2578 build_int_cst (NULL_TREE, 0),
2579 tree_cons (NULL_TREE,
2580 build_int_cst (NULL_TREE, 0),
2582 : build_int_cst (NULL_TREE, 0), initlist);
2583 initlist = objc_build_constructor (TREE_TYPE (UOBJC_SELECTOR_TABLE_decl),
2584 nreverse (initlist));
2585 finish_var_decl (UOBJC_SELECTOR_TABLE_decl, initlist);
2590 get_proto_encoding (tree proto)
2595 if (! METHOD_ENCODING (proto))
2597 encoding = encode_method_prototype (proto);
2598 METHOD_ENCODING (proto) = encoding;
2601 encoding = METHOD_ENCODING (proto);
2603 return add_objc_string (encoding, meth_var_types);
2606 return build_int_cst (NULL_TREE, 0);
2609 /* sel_ref_chain is a list whose "value" fields will be instances of
2610 identifier_node that represent the selector. */
2613 build_typed_selector_reference (tree ident, tree prototype)
2615 tree *chain = &sel_ref_chain;
2621 if (TREE_PURPOSE (*chain) == prototype && TREE_VALUE (*chain) == ident)
2622 goto return_at_index;
2625 chain = &TREE_CHAIN (*chain);
2628 *chain = tree_cons (prototype, ident, NULL_TREE);
2631 expr = build_unary_op (ADDR_EXPR,
2632 build_array_ref (UOBJC_SELECTOR_TABLE_decl,
2633 build_int_cst (NULL_TREE, index),
2636 return convert (objc_selector_type, expr);
2640 build_selector_reference (tree ident)
2642 tree *chain = &sel_ref_chain;
2648 if (TREE_VALUE (*chain) == ident)
2649 return (flag_next_runtime
2650 ? TREE_PURPOSE (*chain)
2651 : build_array_ref (UOBJC_SELECTOR_TABLE_decl,
2652 build_int_cst (NULL_TREE, index),
2656 chain = &TREE_CHAIN (*chain);
2659 expr = (flag_next_runtime ? build_selector_reference_decl (): NULL_TREE);
2661 *chain = tree_cons (expr, ident, NULL_TREE);
2663 return (flag_next_runtime
2665 : build_array_ref (UOBJC_SELECTOR_TABLE_decl,
2666 build_int_cst (NULL_TREE, index),
2670 static GTY(()) int class_reference_idx;
2673 build_class_reference_decl (void)
2678 sprintf (buf, "_OBJC_CLASS_REFERENCES_%d", class_reference_idx++);
2679 decl = start_var_decl (objc_class_type, buf);
2684 /* Create a class reference, but don't create a variable to reference
2688 add_class_reference (tree ident)
2692 if ((chain = cls_ref_chain))
2697 if (ident == TREE_VALUE (chain))
2701 chain = TREE_CHAIN (chain);
2705 /* Append to the end of the list */
2706 TREE_CHAIN (tail) = tree_cons (NULL_TREE, ident, NULL_TREE);
2709 cls_ref_chain = tree_cons (NULL_TREE, ident, NULL_TREE);
2712 /* Get a class reference, creating it if necessary. Also create the
2713 reference variable. */
2716 objc_get_class_reference (tree ident)
2718 tree orig_ident = (DECL_P (ident)
2721 ? OBJC_TYPE_NAME (ident)
2723 bool local_scope = false;
2726 if (processing_template_decl)
2727 /* Must wait until template instantiation time. */
2728 return build_min_nt (CLASS_REFERENCE_EXPR, ident);
2731 if (TREE_CODE (ident) == TYPE_DECL)
2732 ident = (DECL_ORIGINAL_TYPE (ident)
2733 ? DECL_ORIGINAL_TYPE (ident)
2734 : TREE_TYPE (ident));
2737 if (TYPE_P (ident) && TYPE_CONTEXT (ident)
2738 && TYPE_CONTEXT (ident) != global_namespace)
2742 if (local_scope || !(ident = objc_is_class_name (ident)))
2744 error ("%qs is not an Objective-C class name or alias",
2745 IDENTIFIER_POINTER (orig_ident));
2746 return error_mark_node;
2749 if (flag_next_runtime && !flag_zero_link)
2754 for (chain = &cls_ref_chain; *chain; chain = &TREE_CHAIN (*chain))
2755 if (TREE_VALUE (*chain) == ident)
2757 if (! TREE_PURPOSE (*chain))
2758 TREE_PURPOSE (*chain) = build_class_reference_decl ();
2760 return TREE_PURPOSE (*chain);
2763 decl = build_class_reference_decl ();
2764 *chain = tree_cons (decl, ident, NULL_TREE);
2771 add_class_reference (ident);
2773 params = build_tree_list (NULL_TREE,
2774 my_build_string_pointer
2775 (IDENTIFIER_LENGTH (ident) + 1,
2776 IDENTIFIER_POINTER (ident)));
2778 assemble_external (objc_get_class_decl);
2779 return build_function_call (objc_get_class_decl, params);
2783 /* For each string section we have a chain which maps identifier nodes
2784 to decls for the strings. */
2787 add_objc_string (tree ident, enum string_section section)
2789 tree *chain, decl, type, string_expr;
2791 if (section == class_names)
2792 chain = &class_names_chain;
2793 else if (section == meth_var_names)
2794 chain = &meth_var_names_chain;
2795 else if (section == meth_var_types)
2796 chain = &meth_var_types_chain;
2802 if (TREE_VALUE (*chain) == ident)
2803 return convert (string_type_node,
2804 build_unary_op (ADDR_EXPR, TREE_PURPOSE (*chain), 1));
2806 chain = &TREE_CHAIN (*chain);
2809 decl = build_objc_string_decl (section);
2811 type = build_array_type
2814 (build_int_cst (NULL_TREE,
2815 IDENTIFIER_LENGTH (ident))));
2816 decl = start_var_decl (type, IDENTIFIER_POINTER (DECL_NAME (decl)));
2817 string_expr = my_build_string (IDENTIFIER_LENGTH (ident) + 1,
2818 IDENTIFIER_POINTER (ident));
2819 finish_var_decl (decl, string_expr);
2821 *chain = tree_cons (decl, ident, NULL_TREE);
2823 return convert (string_type_node, build_unary_op (ADDR_EXPR, decl, 1));
2826 static GTY(()) int class_names_idx;
2827 static GTY(()) int meth_var_names_idx;
2828 static GTY(()) int meth_var_types_idx;
2831 build_objc_string_decl (enum string_section section)
2836 if (section == class_names)
2837 sprintf (buf, "_OBJC_CLASS_NAME_%d", class_names_idx++);
2838 else if (section == meth_var_names)
2839 sprintf (buf, "_OBJC_METH_VAR_NAME_%d", meth_var_names_idx++);
2840 else if (section == meth_var_types)
2841 sprintf (buf, "_OBJC_METH_VAR_TYPE_%d", meth_var_types_idx++);
2843 ident = get_identifier (buf);
2845 decl = build_decl (VAR_DECL, ident, build_array_type (char_type_node, 0));
2846 DECL_EXTERNAL (decl) = 1;
2847 TREE_PUBLIC (decl) = 0;
2848 TREE_USED (decl) = 1;
2849 TREE_CONSTANT (decl) = 1;
2850 DECL_CONTEXT (decl) = 0;
2851 DECL_ARTIFICIAL (decl) = 1;
2853 DECL_THIS_STATIC (decl) = 1; /* squash redeclaration errors */
2856 make_decl_rtl (decl);
2857 pushdecl_top_level (decl);
2864 objc_declare_alias (tree alias_ident, tree class_ident)
2866 tree underlying_class;
2869 if (current_namespace != global_namespace) {
2870 error ("Objective-C declarations may only appear in global scope");
2872 #endif /* OBJCPLUS */
2874 if (!(underlying_class = objc_is_class_name (class_ident)))
2875 warning (0, "cannot find class %qs", IDENTIFIER_POINTER (class_ident));
2876 else if (objc_is_class_name (alias_ident))
2877 warning (0, "class %qs already exists", IDENTIFIER_POINTER (alias_ident));
2880 /* Implement @compatibility_alias as a typedef. */
2882 push_lang_context (lang_name_c); /* extern "C" */
2884 lang_hooks.decls.pushdecl (build_decl
2887 xref_tag (RECORD_TYPE, underlying_class)));
2889 pop_lang_context ();
2891 alias_chain = tree_cons (underlying_class, alias_ident, alias_chain);
2896 objc_declare_class (tree ident_list)
2900 if (current_namespace != global_namespace) {
2901 error ("Objective-C declarations may only appear in global scope");
2903 #endif /* OBJCPLUS */
2905 for (list = ident_list; list; list = TREE_CHAIN (list))
2907 tree ident = TREE_VALUE (list);
2909 if (! objc_is_class_name (ident))
2911 tree record = lookup_name (ident), type = record;
2915 if (TREE_CODE (record) == TYPE_DECL)
2916 type = DECL_ORIGINAL_TYPE (record);
2918 if (!TYPE_HAS_OBJC_INFO (type)
2919 || !TYPE_OBJC_INTERFACE (type))
2921 error ("%qs redeclared as different kind of symbol",
2922 IDENTIFIER_POINTER (ident));
2923 error ("previous declaration of %q+D",
2928 record = xref_tag (RECORD_TYPE, ident);
2929 INIT_TYPE_OBJC_INFO (record);
2930 TYPE_OBJC_INTERFACE (record) = ident;
2931 class_chain = tree_cons (NULL_TREE, ident, class_chain);
2937 objc_is_class_name (tree ident)
2941 if (ident && TREE_CODE (ident) == IDENTIFIER_NODE
2942 && identifier_global_value (ident))
2943 ident = identifier_global_value (ident);
2944 while (ident && TREE_CODE (ident) == TYPE_DECL && DECL_ORIGINAL_TYPE (ident))
2945 ident = OBJC_TYPE_NAME (DECL_ORIGINAL_TYPE (ident));
2947 if (ident && TREE_CODE (ident) == RECORD_TYPE)
2948 ident = OBJC_TYPE_NAME (ident);
2950 if (ident && TREE_CODE (ident) == TYPE_DECL)
2951 ident = DECL_NAME (ident);
2953 if (!ident || TREE_CODE (ident) != IDENTIFIER_NODE)
2956 if (lookup_interface (ident))
2959 for (chain = class_chain; chain; chain = TREE_CHAIN (chain))
2961 if (ident == TREE_VALUE (chain))
2965 for (chain = alias_chain; chain; chain = TREE_CHAIN (chain))
2967 if (ident == TREE_VALUE (chain))
2968 return TREE_PURPOSE (chain);
2974 /* Check whether TYPE is either 'id' or 'Class'. */
2977 objc_is_id (tree type)
2979 if (type && TREE_CODE (type) == IDENTIFIER_NODE
2980 && identifier_global_value (type))
2981 type = identifier_global_value (type);
2983 if (type && TREE_CODE (type) == TYPE_DECL)
2984 type = TREE_TYPE (type);
2986 /* NB: This function may be called before the ObjC front-end has
2987 been initialized, in which case OBJC_OBJECT_TYPE will (still) be NULL. */
2988 return (objc_object_type && type
2989 && (IS_ID (type) || IS_CLASS (type) || IS_SUPER (type))
2994 /* Check whether TYPE is either 'id', 'Class', or a pointer to an ObjC
2995 class instance. This is needed by other parts of the compiler to
2996 handle ObjC types gracefully. */
2999 objc_is_object_ptr (tree type)
3003 type = TYPE_MAIN_VARIANT (type);
3004 if (!POINTER_TYPE_P (type))
3007 ret = objc_is_id (type);
3009 ret = objc_is_class_name (TREE_TYPE (type));
3015 objc_is_gcable_type (tree type, int or_strong_p)
3021 if (objc_is_id (TYPE_MAIN_VARIANT (type)))
3023 if (or_strong_p && lookup_attribute ("objc_gc", TYPE_ATTRIBUTES (type)))
3025 if (TREE_CODE (type) != POINTER_TYPE && TREE_CODE (type) != INDIRECT_REF)
3027 type = TREE_TYPE (type);
3028 if (TREE_CODE (type) != RECORD_TYPE)
3030 name = TYPE_NAME (type);
3031 return (objc_is_class_name (name) != NULL_TREE);
3035 objc_substitute_decl (tree expr, tree oldexpr, tree newexpr)
3037 if (expr == oldexpr)
3040 switch (TREE_CODE (expr))
3043 return objc_build_component_ref
3044 (objc_substitute_decl (TREE_OPERAND (expr, 0),
3047 DECL_NAME (TREE_OPERAND (expr, 1)));
3049 return build_array_ref (objc_substitute_decl (TREE_OPERAND (expr, 0),
3052 TREE_OPERAND (expr, 1),
3055 return build_indirect_ref (objc_substitute_decl (TREE_OPERAND (expr, 0),
3065 objc_build_ivar_assignment (tree outervar, tree lhs, tree rhs)
3068 /* The LHS parameter contains the expression 'outervar->memberspec';
3069 we need to transform it into '&((typeof(outervar) *) 0)->memberspec',
3070 where memberspec may be arbitrarily complex (e.g., 'g->f.d[2].g[3]').
3073 = objc_substitute_decl
3074 (lhs, outervar, convert (TREE_TYPE (outervar), integer_zero_node));
3076 = (flag_objc_direct_dispatch
3077 ? objc_assign_ivar_fast_decl
3078 : objc_assign_ivar_decl);
3080 offs = convert (integer_type_node, build_unary_op (ADDR_EXPR, offs, 0));
3082 func_params = tree_cons (NULL_TREE,
3083 convert (objc_object_type, rhs),
3084 tree_cons (NULL_TREE, convert (objc_object_type, outervar),
3085 tree_cons (NULL_TREE, offs,
3088 assemble_external (func);
3089 return build_function_call (func, func_params);
3093 objc_build_global_assignment (tree lhs, tree rhs)
3095 tree func_params = tree_cons (NULL_TREE,
3096 convert (objc_object_type, rhs),
3097 tree_cons (NULL_TREE, convert (build_pointer_type (objc_object_type),
3098 build_unary_op (ADDR_EXPR, lhs, 0)),
3101 assemble_external (objc_assign_global_decl);
3102 return build_function_call (objc_assign_global_decl, func_params);
3106 objc_build_strong_cast_assignment (tree lhs, tree rhs)
3108 tree func_params = tree_cons (NULL_TREE,
3109 convert (objc_object_type, rhs),
3110 tree_cons (NULL_TREE, convert (build_pointer_type (objc_object_type),
3111 build_unary_op (ADDR_EXPR, lhs, 0)),
3114 assemble_external (objc_assign_strong_cast_decl);
3115 return build_function_call (objc_assign_strong_cast_decl, func_params);
3119 objc_is_gcable_p (tree expr)
3121 return (TREE_CODE (expr) == COMPONENT_REF
3122 ? objc_is_gcable_p (TREE_OPERAND (expr, 1))
3123 : TREE_CODE (expr) == ARRAY_REF
3124 ? (objc_is_gcable_p (TREE_TYPE (expr))
3125 || objc_is_gcable_p (TREE_OPERAND (expr, 0)))
3126 : TREE_CODE (expr) == ARRAY_TYPE
3127 ? objc_is_gcable_p (TREE_TYPE (expr))
3129 ? objc_is_gcable_type (expr, 1)
3130 : (objc_is_gcable_p (TREE_TYPE (expr))
3132 && lookup_attribute ("objc_gc", DECL_ATTRIBUTES (expr)))));
3136 objc_is_ivar_reference_p (tree expr)
3138 return (TREE_CODE (expr) == ARRAY_REF
3139 ? objc_is_ivar_reference_p (TREE_OPERAND (expr, 0))
3140 : TREE_CODE (expr) == COMPONENT_REF
3141 ? TREE_CODE (TREE_OPERAND (expr, 1)) == FIELD_DECL
3146 objc_is_global_reference_p (tree expr)
3148 return (TREE_CODE (expr) == INDIRECT_REF || TREE_CODE (expr) == PLUS_EXPR
3149 ? objc_is_global_reference_p (TREE_OPERAND (expr, 0))
3151 ? (!DECL_CONTEXT (expr) || TREE_STATIC (expr))
3156 objc_generate_write_barrier (tree lhs, enum tree_code modifycode, tree rhs)
3158 tree result = NULL_TREE, outer;
3159 int strong_cast_p = 0, outer_gc_p = 0, indirect_p = 0;
3161 /* See if we have any lhs casts, and strip them out. NB: The lvalue casts
3162 will have been transformed to the form '*(type *)&expr'. */
3163 if (TREE_CODE (lhs) == INDIRECT_REF)
3165 outer = TREE_OPERAND (lhs, 0);
3167 while (!strong_cast_p
3168 && (CONVERT_EXPR_P (outer)
3169 || TREE_CODE (outer) == NON_LVALUE_EXPR))
3171 tree lhstype = TREE_TYPE (outer);
3173 /* Descend down the cast chain, and record the first objc_gc
3175 if (POINTER_TYPE_P (lhstype))
3178 = lookup_attribute ("objc_gc",
3179 TYPE_ATTRIBUTES (TREE_TYPE (lhstype)));
3185 outer = TREE_OPERAND (outer, 0);
3189 /* If we have a __strong cast, it trumps all else. */
3192 if (modifycode != NOP_EXPR)
3193 goto invalid_pointer_arithmetic;
3195 if (warn_assign_intercept)
3196 warning (0, "strong-cast assignment has been intercepted");
3198 result = objc_build_strong_cast_assignment (lhs, rhs);
3203 /* the lhs must be of a suitable type, regardless of its underlying
3205 if (!objc_is_gcable_p (lhs))
3211 && (TREE_CODE (outer) == COMPONENT_REF
3212 || TREE_CODE (outer) == ARRAY_REF))
3213 outer = TREE_OPERAND (outer, 0);
3215 if (TREE_CODE (outer) == INDIRECT_REF)
3217 outer = TREE_OPERAND (outer, 0);
3221 outer_gc_p = objc_is_gcable_p (outer);
3223 /* Handle ivar assignments. */
3224 if (objc_is_ivar_reference_p (lhs))
3226 /* if the struct to the left of the ivar is not an Objective-C object (__strong
3227 doesn't cut it here), the best we can do here is suggest a cast. */
3228 if (!objc_is_gcable_type (TREE_TYPE (outer), 0))
3230 /* We may still be able to use the global write barrier... */
3231 if (!indirect_p && objc_is_global_reference_p (outer))
3232 goto global_reference;
3235 if (modifycode == NOP_EXPR)
3237 if (warn_assign_intercept)
3238 warning (0, "strong-cast may possibly be needed");
3244 if (modifycode != NOP_EXPR)
3245 goto invalid_pointer_arithmetic;
3247 if (warn_assign_intercept)
3248 warning (0, "instance variable assignment has been intercepted");
3250 result = objc_build_ivar_assignment (outer, lhs, rhs);
3255 /* Likewise, intercept assignment to global/static variables if their type is
3257 if (objc_is_global_reference_p (outer))
3263 if (modifycode != NOP_EXPR)
3265 invalid_pointer_arithmetic:
3267 warning (0, "pointer arithmetic for garbage-collected objects not allowed");
3272 if (warn_assign_intercept)
3273 warning (0, "global/static variable assignment has been intercepted");
3275 result = objc_build_global_assignment (lhs, rhs);
3278 /* In all other cases, fall back to the normal mechanism. */
3283 struct interface_tuple GTY(())
3289 static GTY ((param_is (struct interface_tuple))) htab_t interface_htab;
3292 hash_interface (const void *p)
3294 const struct interface_tuple *d = (const struct interface_tuple *) p;
3295 return IDENTIFIER_HASH_VALUE (d->id);
3299 eq_interface (const void *p1, const void *p2)
3301 const struct interface_tuple *d = (const struct interface_tuple *) p1;
3306 lookup_interface (tree ident)
3309 if (ident && TREE_CODE (ident) == TYPE_DECL)
3310 ident = DECL_NAME (ident);
3313 if (ident == NULL_TREE || TREE_CODE (ident) != IDENTIFIER_NODE)
3317 struct interface_tuple **slot;
3322 slot = (struct interface_tuple **)
3323 htab_find_slot_with_hash (interface_htab, ident,
3324 IDENTIFIER_HASH_VALUE (ident),
3327 i = (*slot)->class_name;
3333 /* Implement @defs (<classname>) within struct bodies. */
3336 objc_get_class_ivars (tree class_name)
3338 tree interface = lookup_interface (class_name);
3341 return get_class_ivars (interface, true);
3343 error ("cannot find interface declaration for %qs",
3344 IDENTIFIER_POINTER (class_name));
3346 return error_mark_node;
3349 /* Used by: build_private_template, continue_class,
3350 and for @defs constructs. */
3353 get_class_ivars (tree interface, bool inherited)
3355 tree ivar_chain = copy_list (CLASS_RAW_IVARS (interface));
3357 /* Both CLASS_RAW_IVARS and CLASS_IVARS contain a list of ivars declared
3358 by the current class (i.e., they do not include super-class ivars).
3359 However, the CLASS_IVARS list will be side-effected by a call to
3360 finish_struct(), which will fill in field offsets. */
3361 if (!CLASS_IVARS (interface))
3362 CLASS_IVARS (interface) = ivar_chain;
3367 while (CLASS_SUPER_NAME (interface))
3369 /* Prepend super-class ivars. */
3370 interface = lookup_interface (CLASS_SUPER_NAME (interface));
3371 ivar_chain = chainon (copy_list (CLASS_RAW_IVARS (interface)),
3379 objc_create_temporary_var (tree type)
3383 decl = build_decl (VAR_DECL, NULL_TREE, type);
3384 TREE_USED (decl) = 1;
3385 DECL_ARTIFICIAL (decl) = 1;
3386 DECL_IGNORED_P (decl) = 1;
3387 DECL_CONTEXT (decl) = current_function_decl;
3392 /* Exception handling constructs. We begin by having the parser do most
3393 of the work and passing us blocks. What we do next depends on whether
3394 we're doing "native" exception handling or legacy Darwin setjmp exceptions.
3395 We abstract all of this in a handful of appropriately named routines. */
3397 /* Stack of open try blocks. */
3399 struct objc_try_context
3401 struct objc_try_context *outer;
3403 /* Statements (or statement lists) as processed by the parser. */
3407 /* Some file position locations. */
3408 location_t try_locus;
3409 location_t end_try_locus;
3410 location_t end_catch_locus;
3411 location_t finally_locus;
3412 location_t end_finally_locus;
3414 /* A STATEMENT_LIST of CATCH_EXPRs, appropriate for sticking into op1
3415 of a TRY_CATCH_EXPR. Even when doing Darwin setjmp. */
3418 /* The CATCH_EXPR of an open @catch clause. */
3421 /* The VAR_DECL holding the Darwin equivalent of EXC_PTR_EXPR. */
3427 static struct objc_try_context *cur_try_context;
3429 /* This hook, called via lang_eh_runtime_type, generates a runtime object
3430 that represents TYPE. For Objective-C, this is just the class name. */
3431 /* ??? Isn't there a class object or some such? Is it easy to get? */
3435 objc_eh_runtime_type (tree type)
3437 return add_objc_string (OBJC_TYPE_NAME (TREE_TYPE (type)), class_names);
3441 /* Initialize exception handling. */
3444 objc_init_exceptions (void)
3446 static bool done = false;
3451 if (flag_objc_sjlj_exceptions)
3453 /* On Darwin, ObjC exceptions require a sufficiently recent
3454 version of the runtime, so the user must ask for them explicitly. */
3455 if (!flag_objc_exceptions)
3456 warning (0, "use %<-fobjc-exceptions%> to enable Objective-C "
3457 "exception syntax");
3462 c_eh_initialized_p = true;
3463 eh_personality_libfunc
3464 = init_one_libfunc (USING_SJLJ_EXCEPTIONS
3465 ? "__gnu_objc_personality_sj0"
3466 : "__gnu_objc_personality_v0");
3467 default_init_unwind_resume_libfunc ();
3468 using_eh_for_cleanups ();
3469 lang_eh_runtime_type = objc_eh_runtime_type;
3474 /* Build an EXC_PTR_EXPR, or the moral equivalent. In the case of Darwin,
3475 we'll arrange for it to be initialized (and associated with a binding)
3479 objc_build_exc_ptr (void)
3481 if (flag_objc_sjlj_exceptions)
3483 tree var = cur_try_context->caught_decl;
3486 var = objc_create_temporary_var (objc_object_type);
3487 cur_try_context->caught_decl = var;
3492 return build0 (EXC_PTR_EXPR, objc_object_type);
3495 /* Build "objc_exception_try_exit(&_stack)". */
3498 next_sjlj_build_try_exit (void)
3501 t = build_fold_addr_expr (cur_try_context->stack_decl);
3502 t = tree_cons (NULL, t, NULL);
3503 t = build_function_call (objc_exception_try_exit_decl, t);
3508 objc_exception_try_enter (&_stack);
3509 if (_setjmp(&_stack.buf))
3513 Return the COND_EXPR. Note that the THEN and ELSE fields are left
3514 empty, ready for the caller to fill them in. */
3517 next_sjlj_build_enter_and_setjmp (void)
3519 tree t, enter, sj, cond;
3521 t = build_fold_addr_expr (cur_try_context->stack_decl);
3522 t = tree_cons (NULL, t, NULL);
3523 enter = build_function_call (objc_exception_try_enter_decl, t);
3525 t = objc_build_component_ref (cur_try_context->stack_decl,
3526 get_identifier ("buf"));
3527 t = build_fold_addr_expr (t);
3529 /* Convert _setjmp argument to type that is expected. */
3530 if (TYPE_ARG_TYPES (TREE_TYPE (objc_setjmp_decl)))
3531 t = convert (TREE_VALUE (TYPE_ARG_TYPES (TREE_TYPE (objc_setjmp_decl))), t);
3533 t = convert (ptr_type_node, t);
3535 t = convert (ptr_type_node, t);
3537 t = tree_cons (NULL, t, NULL);
3538 sj = build_function_call (objc_setjmp_decl, t);
3540 cond = build2 (COMPOUND_EXPR, TREE_TYPE (sj), enter, sj);
3541 cond = c_common_truthvalue_conversion (input_location, cond);
3543 return build3 (COND_EXPR, void_type_node, cond, NULL, NULL);
3548 DECL = objc_exception_extract(&_stack); */
3551 next_sjlj_build_exc_extract (tree decl)
3555 t = build_fold_addr_expr (cur_try_context->stack_decl);
3556 t = tree_cons (NULL, t, NULL);
3557 t = build_function_call (objc_exception_extract_decl, t);
3558 t = convert (TREE_TYPE (decl), t);
3559 t = build2 (MODIFY_EXPR, void_type_node, decl, t);
3565 if (objc_exception_match(obj_get_class(TYPE), _caught)
3572 objc_exception_try_exit(&_stack);
3574 from the sequence of CATCH_EXPRs in the current try context. */
3577 next_sjlj_build_catch_list (void)
3579 tree_stmt_iterator i = tsi_start (cur_try_context->catch_list);
3581 tree *last = &catch_seq;
3582 bool saw_id = false;
3584 for (; !tsi_end_p (i); tsi_next (&i))
3586 tree stmt = tsi_stmt (i);
3587 tree type = CATCH_TYPES (stmt);
3588 tree body = CATCH_BODY (stmt);
3600 if (type == error_mark_node)
3601 cond = error_mark_node;
3604 args = tree_cons (NULL, cur_try_context->caught_decl, NULL);
3605 t = objc_get_class_reference (OBJC_TYPE_NAME (TREE_TYPE (type)));
3606 args = tree_cons (NULL, t, args);
3607 t = build_function_call (objc_exception_match_decl, args);
3608 cond = c_common_truthvalue_conversion (input_location, t);
3610 t = build3 (COND_EXPR, void_type_node, cond, body, NULL);
3611 SET_EXPR_LOCUS (t, EXPR_LOCUS (stmt));
3614 last = &COND_EXPR_ELSE (t);
3620 t = build2 (MODIFY_EXPR, void_type_node, cur_try_context->rethrow_decl,
3621 cur_try_context->caught_decl);
3622 SET_EXPR_LOCATION (t, cur_try_context->end_catch_locus);
3623 append_to_statement_list (t, last);
3625 t = next_sjlj_build_try_exit ();
3626 SET_EXPR_LOCATION (t, cur_try_context->end_catch_locus);
3627 append_to_statement_list (t, last);
3633 /* Build a complete @try-@catch-@finally block for legacy Darwin setjmp
3634 exception handling. We aim to build:
3637 struct _objc_exception_data _stack;
3641 objc_exception_try_enter (&_stack);
3642 if (_setjmp(&_stack.buf))
3644 id _caught = objc_exception_extract(&_stack);
3645 objc_exception_try_enter (&_stack);
3646 if (_setjmp(&_stack.buf))
3647 _rethrow = objc_exception_extract(&_stack);
3657 objc_exception_try_exit(&_stack);
3660 objc_exception_throw(_rethrow);
3664 If CATCH-LIST is empty, we can omit all of the block containing
3665 "_caught" except for the setting of _rethrow. Note the use of
3666 a real TRY_FINALLY_EXPR here, which is not involved in EH per-se,
3667 but handles goto and other exits from the block. */
3670 next_sjlj_build_try_catch_finally (void)
3672 tree rethrow_decl, stack_decl, t;
3673 tree catch_seq, try_fin, bind;
3675 /* Create the declarations involved. */
3676 t = xref_tag (RECORD_TYPE, get_identifier (UTAG_EXCDATA));
3677 stack_decl = objc_create_temporary_var (t);
3678 cur_try_context->stack_decl = stack_decl;
3680 rethrow_decl = objc_create_temporary_var (objc_object_type);
3681 cur_try_context->rethrow_decl = rethrow_decl;
3682 TREE_CHAIN (rethrow_decl) = stack_decl;
3684 /* Build the outermost variable binding level. */
3685 bind = build3 (BIND_EXPR, void_type_node, rethrow_decl, NULL, NULL);
3686 SET_EXPR_LOCATION (bind, cur_try_context->try_locus);
3687 TREE_SIDE_EFFECTS (bind) = 1;
3689 /* Initialize rethrow_decl. */
3690 t = build2 (MODIFY_EXPR, void_type_node, rethrow_decl,
3691 convert (objc_object_type, null_pointer_node));
3692 SET_EXPR_LOCATION (t, cur_try_context->try_locus);
3693 append_to_statement_list (t, &BIND_EXPR_BODY (bind));
3695 /* Build the outermost TRY_FINALLY_EXPR. */
3696 try_fin = build2 (TRY_FINALLY_EXPR, void_type_node, NULL, NULL);
3697 SET_EXPR_LOCATION (try_fin, cur_try_context->try_locus);
3698 TREE_SIDE_EFFECTS (try_fin) = 1;
3699 append_to_statement_list (try_fin, &BIND_EXPR_BODY (bind));
3701 /* Create the complete catch sequence. */
3702 if (cur_try_context->catch_list)
3704 tree caught_decl = objc_build_exc_ptr ();
3705 catch_seq = build_stmt (BIND_EXPR, caught_decl, NULL, NULL);
3706 TREE_SIDE_EFFECTS (catch_seq) = 1;
3708 t = next_sjlj_build_exc_extract (caught_decl);
3709 append_to_statement_list (t, &BIND_EXPR_BODY (catch_seq));
3711 t = next_sjlj_build_enter_and_setjmp ();
3712 COND_EXPR_THEN (t) = next_sjlj_build_exc_extract (rethrow_decl);
3713 COND_EXPR_ELSE (t) = next_sjlj_build_catch_list ();
3714 append_to_statement_list (t, &BIND_EXPR_BODY (catch_seq));
3717 catch_seq = next_sjlj_build_exc_extract (rethrow_decl);
3718 SET_EXPR_LOCATION (catch_seq, cur_try_context->end_try_locus);
3720 /* Build the main register-and-try if statement. */
3721 t = next_sjlj_build_enter_and_setjmp ();
3722 SET_EXPR_LOCATION (t, cur_try_context->try_locus);
3723 COND_EXPR_THEN (t) = catch_seq;
3724 COND_EXPR_ELSE (t) = cur_try_context->try_body;
3725 TREE_OPERAND (try_fin, 0) = t;
3727 /* Build the complete FINALLY statement list. */
3728 t = next_sjlj_build_try_exit ();
3729 t = build_stmt (COND_EXPR,
3730 c_common_truthvalue_conversion
3731 (input_location, rethrow_decl),
3733 SET_EXPR_LOCATION (t, cur_try_context->finally_locus);
3734 append_to_statement_list (t, &TREE_OPERAND (try_fin, 1));
3736 append_to_statement_list (cur_try_context->finally_body,
3737 &TREE_OPERAND (try_fin, 1));
3739 t = tree_cons (NULL, rethrow_decl, NULL);
3740 t = build_function_call (objc_exception_throw_decl, t);
3741 t = build_stmt (COND_EXPR,
3742 c_common_truthvalue_conversion (input_location,
3745 SET_EXPR_LOCATION (t, cur_try_context->end_finally_locus);
3746 append_to_statement_list (t, &TREE_OPERAND (try_fin, 1));
3751 /* Called just after parsing the @try and its associated BODY. We now
3752 must prepare for the tricky bits -- handling the catches and finally. */
3755 objc_begin_try_stmt (location_t try_locus, tree body)
3757 struct objc_try_context *c = XCNEW (struct objc_try_context);
3758 c->outer = cur_try_context;
3760 c->try_locus = try_locus;
3761 c->end_try_locus = input_location;
3762 cur_try_context = c;
3764 objc_init_exceptions ();
3766 if (flag_objc_sjlj_exceptions)
3767 objc_mark_locals_volatile (NULL);
3770 /* Called just after parsing "@catch (parm)". Open a binding level,
3771 enter DECL into the binding level, and initialize it. Leave the
3772 binding level open while the body of the compound statement is parsed. */
3775 objc_begin_catch_clause (tree decl)
3777 tree compound, type, t;
3779 /* Begin a new scope that the entire catch clause will live in. */
3780 compound = c_begin_compound_stmt (true);
3782 /* The parser passed in a PARM_DECL, but what we really want is a VAR_DECL. */
3783 decl = build_decl (VAR_DECL, DECL_NAME (decl), TREE_TYPE (decl));
3784 lang_hooks.decls.pushdecl (decl);
3786 /* Since a decl is required here by syntax, don't warn if its unused. */
3787 /* ??? As opposed to __attribute__((unused))? Anyway, this appears to
3788 be what the previous objc implementation did. */
3789 TREE_USED (decl) = 1;
3791 /* Verify that the type of the catch is valid. It must be a pointer
3792 to an Objective-C class, or "id" (which is catch-all). */
3793 type = TREE_TYPE (decl);
3795 if (POINTER_TYPE_P (type) && objc_is_object_id (TREE_TYPE (type)))
3797 else if (!POINTER_TYPE_P (type) || !TYPED_OBJECT (TREE_TYPE (type)))
3799 error ("@catch parameter is not a known Objective-C class type");
3800 type = error_mark_node;
3802 else if (cur_try_context->catch_list)
3804 /* Examine previous @catch clauses and see if we've already
3805 caught the type in question. */
3806 tree_stmt_iterator i = tsi_start (cur_try_context->catch_list);
3807 for (; !tsi_end_p (i); tsi_next (&i))
3809 tree stmt = tsi_stmt (i);
3810 t = CATCH_TYPES (stmt);
3811 if (t == error_mark_node)
3813 if (!t || DERIVED_FROM_P (TREE_TYPE (t), TREE_TYPE (type)))
3815 warning (0, "exception of type %<%T%> will be caught",
3817 warning (0, "%H by earlier handler for %<%T%>",
3818 EXPR_LOCUS (stmt), TREE_TYPE (t ? t : objc_object_type));
3824 /* Record the data for the catch in the try context so that we can
3825 finalize it later. */
3826 t = build_stmt (CATCH_EXPR, type, compound);
3827 cur_try_context->current_catch = t;
3829 /* Initialize the decl from the EXC_PTR_EXPR we get from the runtime. */
3830 t = objc_build_exc_ptr ();
3831 t = convert (TREE_TYPE (decl), t);
3832 t = build2 (MODIFY_EXPR, void_type_node, decl, t);
3836 /* Called just after parsing the closing brace of a @catch clause. Close
3837 the open binding level, and record a CATCH_EXPR for it. */
3840 objc_finish_catch_clause (void)
3842 tree c = cur_try_context->current_catch;
3843 cur_try_context->current_catch = NULL;
3844 cur_try_context->end_catch_locus = input_location;
3846 CATCH_BODY (c) = c_end_compound_stmt (CATCH_BODY (c), 1);
3847 append_to_statement_list (c, &cur_try_context->catch_list);
3850 /* Called after parsing a @finally clause and its associated BODY.
3851 Record the body for later placement. */
3854 objc_build_finally_clause (location_t finally_locus, tree body)
3856 cur_try_context->finally_body = body;
3857 cur_try_context->finally_locus = finally_locus;
3858 cur_try_context->end_finally_locus = input_location;
3861 /* Called to finalize a @try construct. */
3864 objc_finish_try_stmt (void)
3866 struct objc_try_context *c = cur_try_context;
3869 if (c->catch_list == NULL && c->finally_body == NULL)
3870 error ("%<@try%> without %<@catch%> or %<@finally%>");
3872 /* If we're doing Darwin setjmp exceptions, build the big nasty. */
3873 if (flag_objc_sjlj_exceptions)
3875 if (!cur_try_context->finally_body)
3877 cur_try_context->finally_locus = input_location;
3878 cur_try_context->end_finally_locus = input_location;
3880 stmt = next_sjlj_build_try_catch_finally ();
3884 /* Otherwise, nest the CATCH inside a FINALLY. */
3888 stmt = build_stmt (TRY_CATCH_EXPR, stmt, c->catch_list);
3889 SET_EXPR_LOCATION (stmt, cur_try_context->try_locus);
3891 if (c->finally_body)
3893 stmt = build_stmt (TRY_FINALLY_EXPR, stmt, c->finally_body);
3894 SET_EXPR_LOCATION (stmt, cur_try_context->try_locus);
3899 cur_try_context = c->outer;
3905 objc_build_throw_stmt (tree throw_expr)
3909 objc_init_exceptions ();
3911 if (throw_expr == NULL)
3913 /* If we're not inside a @catch block, there is no "current
3914 exception" to be rethrown. */
3915 if (cur_try_context == NULL
3916 || cur_try_context->current_catch == NULL)
3918 error ("%<@throw%> (rethrow) used outside of a @catch block");
3922 /* Otherwise the object is still sitting in the EXC_PTR_EXPR
3923 value that we get from the runtime. */
3924 throw_expr = objc_build_exc_ptr ();
3927 /* A throw is just a call to the runtime throw function with the
3928 object as a parameter. */
3929 args = tree_cons (NULL, throw_expr, NULL);
3930 return add_stmt (build_function_call (objc_exception_throw_decl, args));
3934 objc_build_synchronized (location_t start_locus, tree mutex, tree body)
3938 /* First lock the mutex. */
3939 mutex = save_expr (mutex);
3940 args = tree_cons (NULL, mutex, NULL);
3941 call = build_function_call (objc_sync_enter_decl, args);
3942 SET_EXPR_LOCATION (call, start_locus);
3945 /* Build the mutex unlock. */
3946 args = tree_cons (NULL, mutex, NULL);
3947 call = build_function_call (objc_sync_exit_decl, args);
3948 SET_EXPR_LOCATION (call, input_location);
3950 /* Put the that and the body in a TRY_FINALLY. */
3951 objc_begin_try_stmt (start_locus, body);
3952 objc_build_finally_clause (input_location, call);
3953 return objc_finish_try_stmt ();
3957 /* Predefine the following data type:
3959 struct _objc_exception_data
3961 int buf[OBJC_JBLEN];
3965 /* The following yuckiness should prevent users from having to #include
3966 <setjmp.h> in their code... */
3968 /* Define to a harmless positive value so the below code doesn't die. */
3970 #define OBJC_JBLEN 18
3974 build_next_objc_exception_stuff (void)
3976 tree field_decl, field_decl_chain, index, temp_type;
3978 objc_exception_data_template
3979 = start_struct (RECORD_TYPE, get_identifier (UTAG_EXCDATA));
3981 /* int buf[OBJC_JBLEN]; */
3983 index = build_index_type (build_int_cst (NULL_TREE, OBJC_JBLEN - 1));
3984 field_decl = create_field_decl (build_array_type (integer_type_node, index),
3986 field_decl_chain = field_decl;
3988 /* void *pointers[4]; */
3990 index = build_index_type (build_int_cst (NULL_TREE, 4 - 1));
3991 field_decl = create_field_decl (build_array_type (ptr_type_node, index),
3993 chainon (field_decl_chain, field_decl);
3995 finish_struct (objc_exception_data_template, field_decl_chain, NULL_TREE);
3997 /* int _setjmp(...); */
3998 /* If the user includes <setjmp.h>, this shall be superseded by
3999 'int _setjmp(jmp_buf);' */
4000 temp_type = build_function_type (integer_type_node, NULL_TREE);
4002 = add_builtin_function (TAG_SETJMP, temp_type, 0, NOT_BUILT_IN, NULL, NULL_TREE);
4004 /* id objc_exception_extract(struct _objc_exception_data *); */
4006 = build_function_type (objc_object_type,
4007 tree_cons (NULL_TREE,
4008 build_pointer_type (objc_exception_data_template),
4010 objc_exception_extract_decl
4011 = add_builtin_function (TAG_EXCEPTIONEXTRACT, temp_type, 0, NOT_BUILT_IN, NULL,
4013 /* void objc_exception_try_enter(struct _objc_exception_data *); */
4014 /* void objc_exception_try_exit(struct _objc_exception_data *); */
4016 = build_function_type (void_type_node,
4017 tree_cons (NULL_TREE,
4018 build_pointer_type (objc_exception_data_template),
4020 objc_exception_try_enter_decl
4021 = add_builtin_function (TAG_EXCEPTIONTRYENTER, temp_type, 0, NOT_BUILT_IN, NULL,
4023 objc_exception_try_exit_decl
4024 = add_builtin_function (TAG_EXCEPTIONTRYEXIT, temp_type, 0, NOT_BUILT_IN, NULL,
4027 /* int objc_exception_match(id, id); */
4029 = build_function_type (integer_type_node,
4030 tree_cons (NULL_TREE, objc_object_type,
4031 tree_cons (NULL_TREE, objc_object_type,
4032 OBJC_VOID_AT_END)));
4033 objc_exception_match_decl
4034 = add_builtin_function (TAG_EXCEPTIONMATCH, temp_type, 0, NOT_BUILT_IN, NULL,
4037 /* id objc_assign_ivar (id, id, unsigned int); */
4038 /* id objc_assign_ivar_Fast (id, id, unsigned int)
4039 __attribute__ ((hard_coded_address (OFFS_ASSIGNIVAR_FAST))); */
4041 = build_function_type (objc_object_type,
4043 (NULL_TREE, objc_object_type,
4044 tree_cons (NULL_TREE, objc_object_type,
4045 tree_cons (NULL_TREE,
4047 OBJC_VOID_AT_END))));
4048 objc_assign_ivar_decl
4049 = add_builtin_function (TAG_ASSIGNIVAR, temp_type, 0, NOT_BUILT_IN,
4051 #ifdef OFFS_ASSIGNIVAR_FAST
4052 objc_assign_ivar_fast_decl
4053 = add_builtin_function (TAG_ASSIGNIVAR_FAST, temp_type, 0,
4054 NOT_BUILT_IN, NULL, NULL_TREE);
4055 DECL_ATTRIBUTES (objc_assign_ivar_fast_decl)
4056 = tree_cons (get_identifier ("hard_coded_address"),
4057 build_int_cst (NULL_TREE, OFFS_ASSIGNIVAR_FAST),
4060 /* Default to slower ivar method. */
4061 objc_assign_ivar_fast_decl = objc_assign_ivar_decl;
4064 /* id objc_assign_global (id, id *); */
4065 /* id objc_assign_strongCast (id, id *); */
4066 temp_type = build_function_type (objc_object_type,
4067 tree_cons (NULL_TREE, objc_object_type,
4068 tree_cons (NULL_TREE, build_pointer_type (objc_object_type),
4069 OBJC_VOID_AT_END)));
4070 objc_assign_global_decl
4071 = add_builtin_function (TAG_ASSIGNGLOBAL, temp_type, 0, NOT_BUILT_IN, NULL,
4073 objc_assign_strong_cast_decl
4074 = add_builtin_function (TAG_ASSIGNSTRONGCAST, temp_type, 0, NOT_BUILT_IN, NULL,
4079 build_objc_exception_stuff (void)
4081 tree noreturn_list, nothrow_list, temp_type;
4083 noreturn_list = tree_cons (get_identifier ("noreturn"), NULL, NULL);
4084 nothrow_list = tree_cons (get_identifier ("nothrow"), NULL, NULL);
4086 /* void objc_exception_throw(id) __attribute__((noreturn)); */
4087 /* void objc_sync_enter(id); */
4088 /* void objc_sync_exit(id); */
4089 temp_type = build_function_type (void_type_node,
4090 tree_cons (NULL_TREE, objc_object_type,
4092 objc_exception_throw_decl
4093 = add_builtin_function (TAG_EXCEPTIONTHROW, temp_type, 0, NOT_BUILT_IN, NULL,
4095 objc_sync_enter_decl
4096 = add_builtin_function (TAG_SYNCENTER, temp_type, 0, NOT_BUILT_IN,
4097 NULL, nothrow_list);
4099 = add_builtin_function (TAG_SYNCEXIT, temp_type, 0, NOT_BUILT_IN,
4100 NULL, nothrow_list);
4103 /* Construct a C struct corresponding to ObjC class CLASS, with the same
4106 struct <classname> {
4107 struct _objc_class *isa;
4112 build_private_template (tree klass)
4114 if (!CLASS_STATIC_TEMPLATE (klass))
4116 tree record = objc_build_struct (klass,
4117 get_class_ivars (klass, false),
4118 CLASS_SUPER_NAME (klass));
4120 /* Set the TREE_USED bit for this struct, so that stab generator
4121 can emit stabs for this struct type. */
4122 if (flag_debug_only_used_symbols && TYPE_STUB_DECL (record))
4123 TREE_USED (TYPE_STUB_DECL (record)) = 1;
4127 /* Begin code generation for protocols... */
4129 /* struct _objc_protocol {
4130 struct _objc_class *isa;
4131 char *protocol_name;
4132 struct _objc_protocol **protocol_list;
4133 struct _objc__method_prototype_list *instance_methods;
4134 struct _objc__method_prototype_list *class_methods;
4138 build_protocol_template (void)
4140 tree field_decl, field_decl_chain;
4142 objc_protocol_template = start_struct (RECORD_TYPE,
4143 get_identifier (UTAG_PROTOCOL));
4145 /* struct _objc_class *isa; */
4146 field_decl = create_field_decl (build_pointer_type
4147 (xref_tag (RECORD_TYPE,
4148 get_identifier (UTAG_CLASS))),
4150 field_decl_chain = field_decl;
4152 /* char *protocol_name; */
4153 field_decl = create_field_decl (string_type_node, "protocol_name");
4154 chainon (field_decl_chain, field_decl);
4156 /* struct _objc_protocol **protocol_list; */
4157 field_decl = create_field_decl (build_pointer_type
4159 (objc_protocol_template)),
4161 chainon (field_decl_chain, field_decl);
4163 /* struct _objc__method_prototype_list *instance_methods; */
4164 field_decl = create_field_decl (objc_method_proto_list_ptr,
4165 "instance_methods");
4166 chainon (field_decl_chain, field_decl);
4168 /* struct _objc__method_prototype_list *class_methods; */
4169 field_decl = create_field_decl (objc_method_proto_list_ptr,
4171 chainon (field_decl_chain, field_decl);
4173 finish_struct (objc_protocol_template, field_decl_chain, NULL_TREE);
4177 build_descriptor_table_initializer (tree type, tree entries)
4179 tree initlist = NULL_TREE;
4183 tree eltlist = NULL_TREE;
4186 = tree_cons (NULL_TREE,
4187 build_selector (METHOD_SEL_NAME (entries)), NULL_TREE);
4189 = tree_cons (NULL_TREE,
4190 add_objc_string (METHOD_ENCODING (entries),
4195 = tree_cons (NULL_TREE,
4196 objc_build_constructor (type, nreverse (eltlist)),
4199 entries = TREE_CHAIN (entries);
4203 return objc_build_constructor (build_array_type (type, 0),
4204 nreverse (initlist));
4207 /* struct objc_method_prototype_list {
4209 struct objc_method_prototype {
4216 build_method_prototype_list_template (tree list_type, int size)
4218 tree objc_ivar_list_record;
4219 tree field_decl, field_decl_chain;
4221 /* Generate an unnamed struct definition. */
4223 objc_ivar_list_record = start_struct (RECORD_TYPE, NULL_TREE);
4225 /* int method_count; */
4226 field_decl = create_field_decl (integer_type_node, "method_count");
4227 field_decl_chain = field_decl;
4229 /* struct objc_method method_list[]; */
4230 field_decl = create_field_decl (build_array_type
4233 (build_int_cst (NULL_TREE, size - 1))),
4235 chainon (field_decl_chain, field_decl);
4237 finish_struct (objc_ivar_list_record, field_decl_chain, NULL_TREE);
4239 return objc_ivar_list_record;
4243 build_method_prototype_template (void)
4246 tree field_decl, field_decl_chain;
4249 = start_struct (RECORD_TYPE, get_identifier (UTAG_METHOD_PROTOTYPE));
4252 field_decl = create_field_decl (objc_selector_type, "_cmd");
4253 field_decl_chain = field_decl;
4255 /* char *method_types; */
4256 field_decl = create_field_decl (string_type_node, "method_types");
4257 chainon (field_decl_chain, field_decl);
4259 finish_struct (proto_record, field_decl_chain, NULL_TREE);
4261 return proto_record;
4265 objc_method_parm_type (tree type)
4267 type = TREE_VALUE (TREE_TYPE (type));
4268 if (TREE_CODE (type) == TYPE_DECL)
4269 type = TREE_TYPE (type);
4274 objc_encoded_type_size (tree type)
4276 int sz = int_size_in_bytes (type);
4278 /* Make all integer and enum types at least as large
4280 if (sz > 0 && INTEGRAL_TYPE_P (type))
4281 sz = MAX (sz, int_size_in_bytes (integer_type_node));
4282 /* Treat arrays as pointers, since that's how they're
4284 else if (TREE_CODE (type) == ARRAY_TYPE)
4285 sz = int_size_in_bytes (ptr_type_node);
4290 encode_method_prototype (tree method_decl)
4297 /* ONEWAY and BYCOPY, for remote object are the only method qualifiers. */
4298 encode_type_qualifiers (TREE_PURPOSE (TREE_TYPE (method_decl)));
4300 /* Encode return type. */
4301 encode_type (objc_method_parm_type (method_decl),
4302 obstack_object_size (&util_obstack),
4303 OBJC_ENCODE_INLINE_DEFS);
4306 /* The first two arguments (self and _cmd) are pointers; account for
4308 i = int_size_in_bytes (ptr_type_node);
4309 parm_offset = 2 * i;
4310 for (parms = METHOD_SEL_ARGS (method_decl); parms;
4311 parms = TREE_CHAIN (parms))
4313 tree type = objc_method_parm_type (parms);
4314 int sz = objc_encoded_type_size (type);
4316 /* If a type size is not known, bail out. */
4319 error ("type %q+D does not have a known size",
4321 /* Pretend that the encoding succeeded; the compilation will
4322 fail nevertheless. */
4323 goto finish_encoding;
4328 sprintf (buf, "%d@0:%d", parm_offset, i);
4329 obstack_grow (&util_obstack, buf, strlen (buf));
4331 /* Argument types. */
4332 parm_offset = 2 * i;
4333 for (parms = METHOD_SEL_ARGS (method_decl); parms;
4334 parms = TREE_CHAIN (parms))
4336 tree type = objc_method_parm_type (parms);
4338 /* Process argument qualifiers for user supplied arguments. */
4339 encode_type_qualifiers (TREE_PURPOSE (TREE_TYPE (parms)));
4342 encode_type (type, obstack_object_size (&util_obstack),
4343 OBJC_ENCODE_INLINE_DEFS);
4345 /* Compute offset. */
4346 sprintf (buf, "%d", parm_offset);
4347 parm_offset += objc_encoded_type_size (type);
4349 obstack_grow (&util_obstack, buf, strlen (buf));
4353 obstack_1grow (&util_obstack, '\0');
4354 result = get_identifier (XOBFINISH (&util_obstack, char *));
4355 obstack_free (&util_obstack, util_firstobj);
4360 generate_descriptor_table (tree type, const char *name, int size, tree list,
4363 tree decl, initlist;
4365 decl = start_var_decl (type, synth_id_with_class_suffix (name, proto));
4367 initlist = build_tree_list (NULL_TREE, build_int_cst (NULL_TREE, size));
4368 initlist = tree_cons (NULL_TREE, list, initlist);
4370 finish_var_decl (decl, objc_build_constructor (type, nreverse (initlist)));
4376 generate_method_descriptors (tree protocol)
4378 tree initlist, chain, method_list_template;
4381 if (!objc_method_prototype_template)
4382 objc_method_prototype_template = build_method_prototype_template ();
4384 chain = PROTOCOL_CLS_METHODS (protocol);
4387 size = list_length (chain);
4389 method_list_template
4390 = build_method_prototype_list_template (objc_method_prototype_template,
4394 = build_descriptor_table_initializer (objc_method_prototype_template,
4397 UOBJC_CLASS_METHODS_decl
4398 = generate_descriptor_table (method_list_template,
4399 "_OBJC_PROTOCOL_CLASS_METHODS",
4400 size, initlist, protocol);
4403 UOBJC_CLASS_METHODS_decl = 0;
4405 chain = PROTOCOL_NST_METHODS (protocol);
4408 size = list_length (chain);
4410 method_list_template
4411 = build_method_prototype_list_template (objc_method_prototype_template,
4414 = build_descriptor_table_initializer (objc_method_prototype_template,
4417 UOBJC_INSTANCE_METHODS_decl
4418 = generate_descriptor_table (method_list_template,
4419 "_OBJC_PROTOCOL_INSTANCE_METHODS",
4420 size, initlist, protocol);
4423 UOBJC_INSTANCE_METHODS_decl = 0;
4427 generate_protocol_references (tree plist)
4431 /* Forward declare protocols referenced. */
4432 for (lproto = plist; lproto; lproto = TREE_CHAIN (lproto))
4434 tree proto = TREE_VALUE (lproto);
4436 if (TREE_CODE (proto) == PROTOCOL_INTERFACE_TYPE
4437 && PROTOCOL_NAME (proto))
4439 if (! PROTOCOL_FORWARD_DECL (proto))
4440 build_protocol_reference (proto);
4442 if (PROTOCOL_LIST (proto))
4443 generate_protocol_references (PROTOCOL_LIST (proto));
4448 /* Generate either '- .cxx_construct' or '- .cxx_destruct' for the
4452 objc_generate_cxx_ctor_or_dtor (bool dtor)
4454 tree fn, body, compound_stmt, ivar;
4456 /* - (id) .cxx_construct { ... return self; } */
4457 /* - (void) .cxx_construct { ... } */
4459 objc_set_method_type (MINUS_EXPR);
4460 objc_start_method_definition
4461 (objc_build_method_signature (build_tree_list (NULL_TREE,
4464 : objc_object_type),
4465 get_identifier (dtor
4467 : TAG_CXX_CONSTRUCT),
4468 make_node (TREE_LIST),
4470 body = begin_function_body ();
4471 compound_stmt = begin_compound_stmt (0);
4473 ivar = CLASS_IVARS (implementation_template);
4474 /* Destroy ivars in reverse order. */
4476 ivar = nreverse (copy_list (ivar));
4478 for (; ivar; ivar = TREE_CHAIN (ivar))
4480 if (TREE_CODE (ivar) == FIELD_DECL)
4482 tree type = TREE_TYPE (ivar);
4484 /* Call the ivar's default constructor or destructor. Do not
4485 call the destructor unless a corresponding constructor call
4486 has also been made (or is not needed). */
4487 if (MAYBE_CLASS_TYPE_P (type)
4489 ? (TYPE_HAS_NONTRIVIAL_DESTRUCTOR (type)
4490 && (!TYPE_NEEDS_CONSTRUCTING (type)
4491 || TYPE_HAS_DEFAULT_CONSTRUCTOR (type)))
4492 : (TYPE_NEEDS_CONSTRUCTING (type)
4493 && TYPE_HAS_DEFAULT_CONSTRUCTOR (type))))
4495 (build_special_member_call
4496 (build_ivar_reference (DECL_NAME (ivar)),
4497 dtor ? complete_dtor_identifier : complete_ctor_identifier,
4498 NULL_TREE, type, LOOKUP_NORMAL, tf_warning_or_error));
4502 /* The constructor returns 'self'. */
4504 finish_return_stmt (self_decl);
4506 finish_compound_stmt (compound_stmt);
4507 finish_function_body (body);
4508 fn = current_function_decl;
4510 objc_finish_method_definition (fn);
4513 /* The following routine will examine the current @interface for any
4514 non-POD C++ ivars requiring non-trivial construction and/or
4515 destruction, and then synthesize special '- .cxx_construct' and/or
4516 '- .cxx_destruct' methods which will run the appropriate
4517 construction or destruction code. Note that ivars inherited from
4518 super-classes are _not_ considered. */
4520 objc_generate_cxx_cdtors (void)
4522 bool need_ctor = false, need_dtor = false;
4525 /* We do not want to do this for categories, since they do not have
4528 if (TREE_CODE (objc_implementation_context) != CLASS_IMPLEMENTATION_TYPE)
4531 /* First, determine if we even need a constructor and/or destructor. */
4533 for (ivar = CLASS_IVARS (implementation_template); ivar;
4534 ivar = TREE_CHAIN (ivar))
4536 if (TREE_CODE (ivar) == FIELD_DECL)
4538 tree type = TREE_TYPE (ivar);
4540 if (MAYBE_CLASS_TYPE_P (type))
4542 if (TYPE_NEEDS_CONSTRUCTING (type)
4543 && TYPE_HAS_DEFAULT_CONSTRUCTOR (type))
4544 /* NB: If a default constructor is not available, we will not
4545 be able to initialize this ivar; the add_instance_variable()
4546 routine will already have warned about this. */
4549 if (TYPE_HAS_NONTRIVIAL_DESTRUCTOR (type)
4550 && (!TYPE_NEEDS_CONSTRUCTING (type)
4551 || TYPE_HAS_DEFAULT_CONSTRUCTOR (type)))
4552 /* NB: If a default constructor is not available, we will not
4553 call the destructor either, for symmetry. */
4559 /* Generate '- .cxx_construct' if needed. */
4562 objc_generate_cxx_ctor_or_dtor (false);
4564 /* Generate '- .cxx_destruct' if needed. */
4567 objc_generate_cxx_ctor_or_dtor (true);
4569 /* The 'imp_list' variable points at an imp_entry record for the current
4570 @implementation. Record the existence of '- .cxx_construct' and/or
4571 '- .cxx_destruct' methods therein; it will be included in the
4572 metadata for the class. */
4573 if (flag_next_runtime)
4574 imp_list->has_cxx_cdtors = (need_ctor || need_dtor);
4578 /* For each protocol which was referenced either from a @protocol()
4579 expression, or because a class/category implements it (then a
4580 pointer to the protocol is stored in the struct describing the
4581 class/category), we create a statically allocated instance of the
4582 Protocol class. The code is written in such a way as to generate
4583 as few Protocol objects as possible; we generate a unique Protocol
4584 instance for each protocol, and we don't generate a Protocol
4585 instance if the protocol is never referenced (either from a
4586 @protocol() or from a class/category implementation). These
4587 statically allocated objects can be referred to via the static
4588 (that is, private to this module) symbols _OBJC_PROTOCOL_n.
4590 The statically allocated Protocol objects that we generate here
4591 need to be fixed up at runtime in order to be used: the 'isa'
4592 pointer of the objects need to be set up to point to the 'Protocol'
4593 class, as known at runtime.
4595 The NeXT runtime fixes up all protocols at program startup time,
4596 before main() is entered. It uses a low-level trick to look up all
4597 those symbols, then loops on them and fixes them up.
4599 The GNU runtime as well fixes up all protocols before user code
4600 from the module is executed; it requires pointers to those symbols
4601 to be put in the objc_symtab (which is then passed as argument to
4602 the function __objc_exec_class() which the compiler sets up to be
4603 executed automatically when the module is loaded); setup of those
4604 Protocol objects happen in two ways in the GNU runtime: all
4605 Protocol objects referred to by a class or category implementation
4606 are fixed up when the class/category is loaded; all Protocol
4607 objects referred to by a @protocol() expression are added by the
4608 compiler to the list of statically allocated instances to fixup
4609 (the same list holding the statically allocated constant string
4610 objects). Because, as explained above, the compiler generates as
4611 few Protocol objects as possible, some Protocol object might end up
4612 being referenced multiple times when compiled with the GNU runtime,
4613 and end up being fixed up multiple times at runtime initialization.
4614 But that doesn't hurt, it's just a little inefficient. */
4617 generate_protocols (void)
4621 tree initlist, protocol_name_expr, refs_decl, refs_expr;
4623 /* If a protocol was directly referenced, pull in indirect references. */
4624 for (p = protocol_chain; p; p = TREE_CHAIN (p))
4625 if (PROTOCOL_FORWARD_DECL (p) && PROTOCOL_LIST (p))
4626 generate_protocol_references (PROTOCOL_LIST (p));
4628 for (p = protocol_chain; p; p = TREE_CHAIN (p))
4630 tree nst_methods = PROTOCOL_NST_METHODS (p);
4631 tree cls_methods = PROTOCOL_CLS_METHODS (p);
4633 /* If protocol wasn't referenced, don't generate any code. */
4634 decl = PROTOCOL_FORWARD_DECL (p);
4639 /* Make sure we link in the Protocol class. */
4640 add_class_reference (get_identifier (PROTOCOL_OBJECT_CLASS_NAME));
4644 if (! METHOD_ENCODING (nst_methods))
4646 encoding = encode_method_prototype (nst_methods);
4647 METHOD_ENCODING (nst_methods) = encoding;
4649 nst_methods = TREE_CHAIN (nst_methods);
4654 if (! METHOD_ENCODING (cls_methods))
4656 encoding = encode_method_prototype (cls_methods);
4657 METHOD_ENCODING (cls_methods) = encoding;
4660 cls_methods = TREE_CHAIN (cls_methods);
4662 generate_method_descriptors (p);
4664 if (PROTOCOL_LIST (p))
4665 refs_decl = generate_protocol_list (p);
4669 /* static struct objc_protocol _OBJC_PROTOCOL_<mumble>; */
4670 protocol_name_expr = add_objc_string (PROTOCOL_NAME (p), class_names);
4673 refs_expr = convert (build_pointer_type (build_pointer_type
4674 (objc_protocol_template)),
4675 build_unary_op (ADDR_EXPR, refs_decl, 0));
4677 refs_expr = build_int_cst (NULL_TREE, 0);
4679 /* UOBJC_INSTANCE_METHODS_decl/UOBJC_CLASS_METHODS_decl are set
4680 by generate_method_descriptors, which is called above. */
4681 initlist = build_protocol_initializer (TREE_TYPE (decl),
4682 protocol_name_expr, refs_expr,
4683 UOBJC_INSTANCE_METHODS_decl,
4684 UOBJC_CLASS_METHODS_decl);
4685 finish_var_decl (decl, initlist);
4690 build_protocol_initializer (tree type, tree protocol_name,
4691 tree protocol_list, tree instance_methods,
4694 tree initlist = NULL_TREE, expr;
4695 tree cast_type = build_pointer_type
4696 (xref_tag (RECORD_TYPE,
4697 get_identifier (UTAG_CLASS)));
4699 /* Filling the "isa" in with one allows the runtime system to
4700 detect that the version change...should remove before final release. */
4702 expr = build_int_cst (cast_type, PROTOCOL_VERSION);
4703 initlist = tree_cons (NULL_TREE, expr, initlist);
4704 initlist = tree_cons (NULL_TREE, protocol_name, initlist);
4705 initlist = tree_cons (NULL_TREE, protocol_list, initlist);
4707 if (!instance_methods)
4708 initlist = tree_cons (NULL_TREE, build_int_cst (NULL_TREE, 0), initlist);
4711 expr = convert (objc_method_proto_list_ptr,
4712 build_unary_op (ADDR_EXPR, instance_methods, 0));
4713 initlist = tree_cons (NULL_TREE, expr, initlist);
4717 initlist = tree_cons (NULL_TREE, build_int_cst (NULL_TREE, 0), initlist);
4720 expr = convert (objc_method_proto_list_ptr,
4721 build_unary_op (ADDR_EXPR, class_methods, 0));
4722 initlist = tree_cons (NULL_TREE, expr, initlist);
4725 return objc_build_constructor (type, nreverse (initlist));
4728 /* struct _objc_category {
4729 char *category_name;
4731 struct _objc_method_list *instance_methods;
4732 struct _objc_method_list *class_methods;
4733 struct _objc_protocol_list *protocols;
4737 build_category_template (void)
4739 tree field_decl, field_decl_chain;
4741 objc_category_template = start_struct (RECORD_TYPE,
4742 get_identifier (UTAG_CATEGORY));
4744 /* char *category_name; */
4745 field_decl = create_field_decl (string_type_node, "category_name");
4746 field_decl_chain = field_decl;
4748 /* char *class_name; */
4749 field_decl = create_field_decl (string_type_node, "class_name");
4750 chainon (field_decl_chain, field_decl);
4752 /* struct _objc_method_list *instance_methods; */
4753 field_decl = create_field_decl (objc_method_list_ptr,
4754 "instance_methods");
4755 chainon (field_decl_chain, field_decl);
4757 /* struct _objc_method_list *class_methods; */
4758 field_decl = create_field_decl (objc_method_list_ptr,
4760 chainon (field_decl_chain, field_decl);
4762 /* struct _objc_protocol **protocol_list; */
4763 field_decl = create_field_decl (build_pointer_type
4765 (objc_protocol_template)),
4767 chainon (field_decl_chain, field_decl);
4769 finish_struct (objc_category_template, field_decl_chain, NULL_TREE);
4772 /* struct _objc_selector {
4778 build_selector_template (void)
4781 tree field_decl, field_decl_chain;
4783 objc_selector_template
4784 = start_struct (RECORD_TYPE, get_identifier (UTAG_SELECTOR));
4787 field_decl = create_field_decl (objc_selector_type, "sel_id");
4788 field_decl_chain = field_decl;
4790 /* char *sel_type; */
4791 field_decl = create_field_decl (string_type_node, "sel_type");
4792 chainon (field_decl_chain, field_decl);
4794 finish_struct (objc_selector_template, field_decl_chain, NULL_TREE);
4797 /* struct _objc_class {
4798 struct _objc_class *isa;
4799 struct _objc_class *super_class;
4804 struct _objc_ivar_list *ivars;
4805 struct _objc_method_list *methods;
4806 #ifdef __NEXT_RUNTIME__
4807 struct objc_cache *cache;
4809 struct sarray *dtable;
4810 struct _objc_class *subclass_list;
4811 struct _objc_class *sibling_class;
4813 struct _objc_protocol_list *protocols;
4814 #ifdef __NEXT_RUNTIME__
4817 void *gc_object_type;
4820 /* NB: The 'sel_id' and 'gc_object_type' fields are not being used by
4821 the NeXT/Apple runtime; still, the compiler must generate them to
4822 maintain backward binary compatibility (and to allow for future
4826 build_class_template (void)
4828 tree field_decl, field_decl_chain;
4831 = start_struct (RECORD_TYPE, get_identifier (UTAG_CLASS));
4833 /* struct _objc_class *isa; */
4834 field_decl = create_field_decl (build_pointer_type (objc_class_template),
4836 field_decl_chain = field_decl;
4838 /* struct _objc_class *super_class; */
4839 field_decl = create_field_decl (build_pointer_type (objc_class_template),
4841 chainon (field_decl_chain, field_decl);
4844 field_decl = create_field_decl (string_type_node, "name");
4845 chainon (field_decl_chain, field_decl);
4848 field_decl = create_field_decl (long_integer_type_node, "version");
4849 chainon (field_decl_chain, field_decl);
4852 field_decl = create_field_decl (long_integer_type_node, "info");
4853 chainon (field_decl_chain, field_decl);
4855 /* long instance_size; */
4856 field_decl = create_field_decl (long_integer_type_node, "instance_size");
4857 chainon (field_decl_chain, field_decl);
4859 /* struct _objc_ivar_list *ivars; */
4860 field_decl = create_field_decl (objc_ivar_list_ptr,
4862 chainon (field_decl_chain, field_decl);
4864 /* struct _objc_method_list *methods; */
4865 field_decl = create_field_decl (objc_method_list_ptr,
4867 chainon (field_decl_chain, field_decl);
4869 if (flag_next_runtime)
4871 /* struct objc_cache *cache; */
4872 field_decl = create_field_decl (build_pointer_type
4873 (xref_tag (RECORD_TYPE,
4877 chainon (field_decl_chain, field_decl);
4881 /* struct sarray *dtable; */
4882 field_decl = create_field_decl (build_pointer_type
4883 (xref_tag (RECORD_TYPE,
4887 chainon (field_decl_chain, field_decl);
4889 /* struct objc_class *subclass_list; */
4890 field_decl = create_field_decl (build_pointer_type
4891 (objc_class_template),
4893 chainon (field_decl_chain, field_decl);
4895 /* struct objc_class *sibling_class; */
4896 field_decl = create_field_decl (build_pointer_type
4897 (objc_class_template),
4899 chainon (field_decl_chain, field_decl);
4902 /* struct _objc_protocol **protocol_list; */
4903 field_decl = create_field_decl (build_pointer_type
4905 (xref_tag (RECORD_TYPE,
4909 chainon (field_decl_chain, field_decl);
4911 if (flag_next_runtime)
4914 field_decl = create_field_decl (build_pointer_type (void_type_node),
4916 chainon (field_decl_chain, field_decl);
4919 /* void *gc_object_type; */
4920 field_decl = create_field_decl (build_pointer_type (void_type_node),
4922 chainon (field_decl_chain, field_decl);
4924 finish_struct (objc_class_template, field_decl_chain, NULL_TREE);
4927 /* Generate appropriate forward declarations for an implementation. */
4930 synth_forward_declarations (void)
4934 /* static struct objc_class _OBJC_CLASS_<my_name>; */
4935 UOBJC_CLASS_decl = build_metadata_decl ("_OBJC_CLASS",
4936 objc_class_template);
4938 /* static struct objc_class _OBJC_METACLASS_<my_name>; */
4939 UOBJC_METACLASS_decl = build_metadata_decl ("_OBJC_METACLASS",
4940 objc_class_template);
4942 /* Pre-build the following entities - for speed/convenience. */
4944 an_id = get_identifier ("super_class");
4945 ucls_super_ref = objc_build_component_ref (UOBJC_CLASS_decl, an_id);
4946 uucls_super_ref = objc_build_component_ref (UOBJC_METACLASS_decl, an_id);
4950 error_with_ivar (const char *message, tree decl)
4952 error ("%J%s %qs", decl,
4953 message, gen_declaration (decl));
4958 check_ivars (tree inter, tree imp)
4960 tree intdecls = CLASS_RAW_IVARS (inter);
4961 tree impdecls = CLASS_RAW_IVARS (imp);
4968 if (intdecls && TREE_CODE (intdecls) == TYPE_DECL)
4969 intdecls = TREE_CHAIN (intdecls);
4971 if (intdecls == 0 && impdecls == 0)
4973 if (intdecls == 0 || impdecls == 0)
4975 error ("inconsistent instance variable specification");
4979 t1 = TREE_TYPE (intdecls); t2 = TREE_TYPE (impdecls);
4981 if (!comptypes (t1, t2)
4982 || !tree_int_cst_equal (DECL_INITIAL (intdecls),
4983 DECL_INITIAL (impdecls)))
4985 if (DECL_NAME (intdecls) == DECL_NAME (impdecls))
4987 error_with_ivar ("conflicting instance variable type",
4989 error_with_ivar ("previous declaration of",
4992 else /* both the type and the name don't match */
4994 error ("inconsistent instance variable specification");
4999 else if (DECL_NAME (intdecls) != DECL_NAME (impdecls))
5001 error_with_ivar ("conflicting instance variable name",
5003 error_with_ivar ("previous declaration of",
5007 intdecls = TREE_CHAIN (intdecls);
5008 impdecls = TREE_CHAIN (impdecls);
5012 /* Set 'objc_super_template' to the data type node for 'struct _objc_super'.
5013 This needs to be done just once per compilation. */
5015 /* struct _objc_super {
5016 struct _objc_object *self;
5017 struct _objc_class *super_class;
5021 build_super_template (void)
5023 tree field_decl, field_decl_chain;
5025 objc_super_template = start_struct (RECORD_TYPE, get_identifier (UTAG_SUPER));
5027 /* struct _objc_object *self; */
5028 field_decl = create_field_decl (objc_object_type, "self");
5029 field_decl_chain = field_decl;
5031 /* struct _objc_class *super_class; */
5032 field_decl = create_field_decl (build_pointer_type (objc_class_template),
5034 chainon (field_decl_chain, field_decl);
5036 finish_struct (objc_super_template, field_decl_chain, NULL_TREE);
5039 /* struct _objc_ivar {
5046 build_ivar_template (void)
5048 tree objc_ivar_id, objc_ivar_record;
5049 tree field_decl, field_decl_chain;
5051 objc_ivar_id = get_identifier (UTAG_IVAR);
5052 objc_ivar_record = start_struct (RECORD_TYPE, objc_ivar_id);
5054 /* char *ivar_name; */
5055 field_decl = create_field_decl (string_type_node, "ivar_name");
5056 field_decl_chain = field_decl;
5058 /* char *ivar_type; */
5059 field_decl = create_field_decl (string_type_node, "ivar_type");
5060 chainon (field_decl_chain, field_decl);
5062 /* int ivar_offset; */
5063 field_decl = create_field_decl (integer_type_node, "ivar_offset");
5064 chainon (field_decl_chain, field_decl);
5066 finish_struct (objc_ivar_record, field_decl_chain, NULL_TREE);
5068 return objc_ivar_record;
5073 struct objc_ivar ivar_list[ivar_count];
5077 build_ivar_list_template (tree list_type, int size)
5079 tree objc_ivar_list_record;
5080 tree field_decl, field_decl_chain;
5082 objc_ivar_list_record = start_struct (RECORD_TYPE, NULL_TREE);
5084 /* int ivar_count; */
5085 field_decl = create_field_decl (integer_type_node, "ivar_count");
5086 field_decl_chain = field_decl;
5088 /* struct objc_ivar ivar_list[]; */
5089 field_decl = create_field_decl (build_array_type
5092 (build_int_cst (NULL_TREE, size - 1))),
5094 chainon (field_decl_chain, field_decl);
5096 finish_struct (objc_ivar_list_record, field_decl_chain, NULL_TREE);
5098 return objc_ivar_list_record;
5102 struct _objc__method_prototype_list *method_next;
5104 struct objc_method method_list[method_count];
5108 build_method_list_template (tree list_type, int size)
5110 tree objc_ivar_list_record;
5111 tree field_decl, field_decl_chain;
5113 objc_ivar_list_record = start_struct (RECORD_TYPE, NULL_TREE);
5115 /* struct _objc__method_prototype_list *method_next; */
5116 field_decl = create_field_decl (objc_method_proto_list_ptr,
5118 field_decl_chain = field_decl;
5120 /* int method_count; */
5121 field_decl = create_field_decl (integer_type_node, "method_count");
5122 chainon (field_decl_chain, field_decl);
5124 /* struct objc_method method_list[]; */
5125 field_decl = create_field_decl (build_array_type
5128 (build_int_cst (NULL_TREE, size - 1))),
5130 chainon (field_decl_chain, field_decl);
5132 finish_struct (objc_ivar_list_record, field_decl_chain, NULL_TREE);
5134 return objc_ivar_list_record;
5138 build_ivar_list_initializer (tree type, tree field_decl)
5140 tree initlist = NULL_TREE;
5144 tree ivar = NULL_TREE;
5147 if (DECL_NAME (field_decl))
5148 ivar = tree_cons (NULL_TREE,
5149 add_objc_string (DECL_NAME (field_decl),
5153 /* Unnamed bit-field ivar (yuck). */
5154 ivar = tree_cons (NULL_TREE, build_int_cst (NULL_TREE, 0), ivar);
5157 encode_field_decl (field_decl,
5158 obstack_object_size (&util_obstack),
5159 OBJC_ENCODE_DONT_INLINE_DEFS);
5161 /* Null terminate string. */
5162 obstack_1grow (&util_obstack, 0);
5166 add_objc_string (get_identifier (XOBFINISH (&util_obstack, char *)),
5169 obstack_free (&util_obstack, util_firstobj);
5172 ivar = tree_cons (NULL_TREE, byte_position (field_decl), ivar);
5173 initlist = tree_cons (NULL_TREE,
5174 objc_build_constructor (type, nreverse (ivar)),
5177 field_decl = TREE_CHAIN (field_decl);
5178 while (field_decl && TREE_CODE (field_decl) != FIELD_DECL);
5182 return objc_build_constructor (build_array_type (type, 0),
5183 nreverse (initlist));
5187 generate_ivars_list (tree type, const char *name, int size, tree list)
5189 tree decl, initlist;
5191 decl = start_var_decl (type, synth_id_with_class_suffix
5192 (name, objc_implementation_context));
5194 initlist = build_tree_list (NULL_TREE, build_int_cst (NULL_TREE, size));
5195 initlist = tree_cons (NULL_TREE, list, initlist);
5197 finish_var_decl (decl,
5198 objc_build_constructor (TREE_TYPE (decl),
5199 nreverse (initlist)));
5204 /* Count only the fields occurring in T. */
5207 ivar_list_length (tree t)
5211 for (; t; t = TREE_CHAIN (t))
5212 if (TREE_CODE (t) == FIELD_DECL)
5219 generate_ivar_lists (void)
5221 tree initlist, ivar_list_template, chain;
5224 generating_instance_variables = 1;
5226 if (!objc_ivar_template)
5227 objc_ivar_template = build_ivar_template ();
5229 /* Only generate class variables for the root of the inheritance
5230 hierarchy since these will be the same for every class. */
5232 if (CLASS_SUPER_NAME (implementation_template) == NULL_TREE
5233 && (chain = TYPE_FIELDS (objc_class_template)))
5235 size = ivar_list_length (chain);
5237 ivar_list_template = build_ivar_list_template (objc_ivar_template, size);
5238 initlist = build_ivar_list_initializer (objc_ivar_template, chain);
5240 UOBJC_CLASS_VARIABLES_decl
5241 = generate_ivars_list (ivar_list_template, "_OBJC_CLASS_VARIABLES",
5245 UOBJC_CLASS_VARIABLES_decl = 0;
5247 chain = CLASS_IVARS (implementation_template);
5250 size = ivar_list_length (chain);
5251 ivar_list_template = build_ivar_list_template (objc_ivar_template, size);
5252 initlist = build_ivar_list_initializer (objc_ivar_template, chain);
5254 UOBJC_INSTANCE_VARIABLES_decl
5255 = generate_ivars_list (ivar_list_template, "_OBJC_INSTANCE_VARIABLES",
5259 UOBJC_INSTANCE_VARIABLES_decl = 0;
5261 generating_instance_variables = 0;
5265 build_dispatch_table_initializer (tree type, tree entries)
5267 tree initlist = NULL_TREE;
5271 tree elemlist = NULL_TREE;
5273 elemlist = tree_cons (NULL_TREE,
5274 build_selector (METHOD_SEL_NAME (entries)),
5277 /* Generate the method encoding if we don't have one already. */
5278 if (! METHOD_ENCODING (entries))
5279 METHOD_ENCODING (entries) =
5280 encode_method_prototype (entries);
5282 elemlist = tree_cons (NULL_TREE,
5283 add_objc_string (METHOD_ENCODING (entries),
5288 = tree_cons (NULL_TREE,
5289 convert (ptr_type_node,
5290 build_unary_op (ADDR_EXPR,
5291 METHOD_DEFINITION (entries), 1)),
5294 initlist = tree_cons (NULL_TREE,
5295 objc_build_constructor (type, nreverse (elemlist)),
5298 entries = TREE_CHAIN (entries);
5302 return objc_build_constructor (build_array_type (type, 0),
5303 nreverse (initlist));
5306 /* To accomplish method prototyping without generating all kinds of
5307 inane warnings, the definition of the dispatch table entries were
5310 struct objc_method { SEL _cmd; ...; id (*_imp)(); };
5312 struct objc_method { SEL _cmd; ...; void *_imp; }; */
5315 build_method_template (void)
5318 tree field_decl, field_decl_chain;
5320 _SLT_record = start_struct (RECORD_TYPE, get_identifier (UTAG_METHOD));
5323 field_decl = create_field_decl (objc_selector_type, "_cmd");
5324 field_decl_chain = field_decl;
5326 /* char *method_types; */
5327 field_decl = create_field_decl (string_type_node, "method_types");
5328 chainon (field_decl_chain, field_decl);
5331 field_decl = create_field_decl (build_pointer_type (void_type_node),
5333 chainon (field_decl_chain, field_decl);
5335 finish_struct (_SLT_record, field_decl_chain, NULL_TREE);
5342 generate_dispatch_table (tree type, const char *name, int size, tree list)
5344 tree decl, initlist;
5346 decl = start_var_decl (type, synth_id_with_class_suffix
5347 (name, objc_implementation_context));
5349 initlist = build_tree_list (NULL_TREE, build_int_cst (NULL_TREE, 0));
5350 initlist = tree_cons (NULL_TREE, build_int_cst (NULL_TREE, size), initlist);
5351 initlist = tree_cons (NULL_TREE, list, initlist);
5353 finish_var_decl (decl,
5354 objc_build_constructor (TREE_TYPE (decl),
5355 nreverse (initlist)));
5361 mark_referenced_methods (void)
5363 struct imp_entry *impent;
5366 for (impent = imp_list; impent; impent = impent->next)
5368 chain = CLASS_CLS_METHODS (impent->imp_context);
5371 cgraph_mark_needed_node (cgraph_node (METHOD_DEFINITION (chain)));
5372 chain = TREE_CHAIN (chain);
5375 chain = CLASS_NST_METHODS (impent->imp_context);
5378 cgraph_mark_needed_node (cgraph_node (METHOD_DEFINITION (chain)));
5379 chain = TREE_CHAIN (chain);
5385 generate_dispatch_tables (void)
5387 tree initlist, chain, method_list_template;
5390 if (!objc_method_template)
5391 objc_method_template = build_method_template ();
5393 chain = CLASS_CLS_METHODS (objc_implementation_context);
5396 size = list_length (chain);
5398 method_list_template
5399 = build_method_list_template (objc_method_template, size);
5401 = build_dispatch_table_initializer (objc_method_template, chain);
5403 UOBJC_CLASS_METHODS_decl
5404 = generate_dispatch_table (method_list_template,
5405 ((TREE_CODE (objc_implementation_context)
5406 == CLASS_IMPLEMENTATION_TYPE)
5407 ? "_OBJC_CLASS_METHODS"
5408 : "_OBJC_CATEGORY_CLASS_METHODS"),
5412 UOBJC_CLASS_METHODS_decl = 0;
5414 chain = CLASS_NST_METHODS (objc_implementation_context);
5417 size = list_length (chain);
5419 method_list_template
5420 = build_method_list_template (objc_method_template, size);
5422 = build_dispatch_table_initializer (objc_method_template, chain);
5424 if (TREE_CODE (objc_implementation_context) == CLASS_IMPLEMENTATION_TYPE)
5425 UOBJC_INSTANCE_METHODS_decl
5426 = generate_dispatch_table (method_list_template,
5427 "_OBJC_INSTANCE_METHODS",
5430 /* We have a category. */
5431 UOBJC_INSTANCE_METHODS_decl
5432 = generate_dispatch_table (method_list_template,
5433 "_OBJC_CATEGORY_INSTANCE_METHODS",
5437 UOBJC_INSTANCE_METHODS_decl = 0;
5441 generate_protocol_list (tree i_or_p)
5444 tree refs_decl, lproto, e, plist;
5446 const char *ref_name;
5448 if (TREE_CODE (i_or_p) == CLASS_INTERFACE_TYPE
5449 || TREE_CODE (i_or_p) == CATEGORY_INTERFACE_TYPE)
5450 plist = CLASS_PROTOCOL_LIST (i_or_p);
5451 else if (TREE_CODE (i_or_p) == PROTOCOL_INTERFACE_TYPE)
5452 plist = PROTOCOL_LIST (i_or_p);
5457 for (lproto = plist; lproto; lproto = TREE_CHAIN (lproto))
5458 if (TREE_CODE (TREE_VALUE (lproto)) == PROTOCOL_INTERFACE_TYPE
5459 && PROTOCOL_FORWARD_DECL (TREE_VALUE (lproto)))
5462 /* Build initializer. */
5463 initlist = tree_cons (NULL_TREE, build_int_cst (NULL_TREE, 0), NULL_TREE);
5464 e = build_int_cst (build_pointer_type (objc_protocol_template), size);
5465 initlist = tree_cons (NULL_TREE, e, initlist);
5467 for (lproto = plist; lproto; lproto = TREE_CHAIN (lproto))
5469 tree pval = TREE_VALUE (lproto);
5471 if (TREE_CODE (pval) == PROTOCOL_INTERFACE_TYPE
5472 && PROTOCOL_FORWARD_DECL (pval))
5474 e = build_unary_op (ADDR_EXPR, PROTOCOL_FORWARD_DECL (pval), 0);
5475 initlist = tree_cons (NULL_TREE, e, initlist);
5479 /* static struct objc_protocol *refs[n]; */
5481 if (TREE_CODE (i_or_p) == PROTOCOL_INTERFACE_TYPE)
5482 ref_name = synth_id_with_class_suffix ("_OBJC_PROTOCOL_REFS", i_or_p);
5483 else if (TREE_CODE (i_or_p) == CLASS_INTERFACE_TYPE)
5484 ref_name = synth_id_with_class_suffix ("_OBJC_CLASS_PROTOCOLS", i_or_p);
5485 else if (TREE_CODE (i_or_p) == CATEGORY_INTERFACE_TYPE)
5486 ref_name = synth_id_with_class_suffix ("_OBJC_CATEGORY_PROTOCOLS", i_or_p);
5490 refs_decl = start_var_decl
5492 (build_pointer_type (objc_protocol_template),
5493 build_index_type (build_int_cst (NULL_TREE, size + 2))),
5496 finish_var_decl (refs_decl, objc_build_constructor (TREE_TYPE (refs_decl),
5497 nreverse (initlist)));
5503 build_category_initializer (tree type, tree cat_name, tree class_name,
5504 tree instance_methods, tree class_methods,
5507 tree initlist = NULL_TREE, expr;
5509 initlist = tree_cons (NULL_TREE, cat_name, initlist);
5510 initlist = tree_cons (NULL_TREE, class_name, initlist);
5512 if (!instance_methods)
5513 initlist = tree_cons (NULL_TREE, build_int_cst (NULL_TREE, 0), initlist);
5516 expr = convert (objc_method_list_ptr,
5517 build_unary_op (ADDR_EXPR, instance_methods, 0));
5518 initlist = tree_cons (NULL_TREE, expr, initlist);
5521 initlist = tree_cons (NULL_TREE, build_int_cst (NULL_TREE, 0), initlist);
5524 expr = convert (objc_method_list_ptr,
5525 build_unary_op (ADDR_EXPR, class_methods, 0));
5526 initlist = tree_cons (NULL_TREE, expr, initlist);
5529 /* protocol_list = */
5531 initlist = tree_cons (NULL_TREE, build_int_cst (NULL_TREE, 0), initlist);
5534 expr = convert (build_pointer_type
5536 (objc_protocol_template)),
5537 build_unary_op (ADDR_EXPR, protocol_list, 0));
5538 initlist = tree_cons (NULL_TREE, expr, initlist);
5541 return objc_build_constructor (type, nreverse (initlist));
5544 /* struct _objc_class {
5545 struct objc_class *isa;
5546 struct objc_class *super_class;
5551 struct objc_ivar_list *ivars;
5552 struct objc_method_list *methods;
5553 if (flag_next_runtime)
5554 struct objc_cache *cache;
5556 struct sarray *dtable;
5557 struct objc_class *subclass_list;
5558 struct objc_class *sibling_class;
5560 struct objc_protocol_list *protocols;
5561 if (flag_next_runtime)
5563 void *gc_object_type;
5567 build_shared_structure_initializer (tree type, tree isa, tree super,
5568 tree name, tree size, int status,
5569 tree dispatch_table, tree ivar_list,
5572 tree initlist = NULL_TREE, expr;
5575 initlist = tree_cons (NULL_TREE, isa, initlist);
5578 initlist = tree_cons (NULL_TREE, super, initlist);
5581 initlist = tree_cons (NULL_TREE, default_conversion (name), initlist);
5584 initlist = tree_cons (NULL_TREE, build_int_cst (long_integer_type_node, 0),
5588 initlist = tree_cons (NULL_TREE,
5589 build_int_cst (long_integer_type_node, status),
5592 /* instance_size = */
5593 initlist = tree_cons (NULL_TREE, convert (long_integer_type_node, size),
5596 /* objc_ivar_list = */
5598 initlist = tree_cons (NULL_TREE, build_int_cst (NULL_TREE, 0), initlist);
5601 expr = convert (objc_ivar_list_ptr,
5602 build_unary_op (ADDR_EXPR, ivar_list, 0));
5603 initlist = tree_cons (NULL_TREE, expr, initlist);
5606 /* objc_method_list = */
5607 if (!dispatch_table)
5608 initlist = tree_cons (NULL_TREE, build_int_cst (NULL_TREE, 0), initlist);
5611 expr = convert (objc_method_list_ptr,
5612 build_unary_op (ADDR_EXPR, dispatch_table, 0));
5613 initlist = tree_cons (NULL_TREE, expr, initlist);
5616 if (flag_next_runtime)
5617 /* method_cache = */
5618 initlist = tree_cons (NULL_TREE, build_int_cst (NULL_TREE, 0), initlist);
5622 initlist = tree_cons (NULL_TREE, build_int_cst (NULL_TREE, 0), initlist);
5624 /* subclass_list = */
5625 initlist = tree_cons (NULL_TREE, build_int_cst (NULL_TREE, 0), initlist);
5627 /* sibling_class = */
5628 initlist = tree_cons (NULL_TREE, build_int_cst (NULL_TREE, 0), initlist);
5631 /* protocol_list = */
5632 if (! protocol_list)
5633 initlist = tree_cons (NULL_TREE, build_int_cst (NULL_TREE, 0), initlist);
5636 expr = convert (build_pointer_type
5638 (objc_protocol_template)),
5639 build_unary_op (ADDR_EXPR, protocol_list, 0));
5640 initlist = tree_cons (NULL_TREE, expr, initlist);
5643 if (flag_next_runtime)
5645 initlist = tree_cons (NULL_TREE, build_int_cst (NULL_TREE, 0), initlist);
5647 /* gc_object_type = NULL */
5648 initlist = tree_cons (NULL_TREE, build_int_cst (NULL_TREE, 0), initlist);
5650 return objc_build_constructor (type, nreverse (initlist));
5653 /* Retrieve category interface CAT_NAME (if any) associated with CLASS. */
5656 lookup_category (tree klass, tree cat_name)
5658 tree category = CLASS_CATEGORY_LIST (klass);
5660 while (category && CLASS_SUPER_NAME (category) != cat_name)
5661 category = CLASS_CATEGORY_LIST (category);
5665 /* static struct objc_category _OBJC_CATEGORY_<name> = { ... }; */
5668 generate_category (tree cat)
5671 tree initlist, cat_name_expr, class_name_expr;
5672 tree protocol_decl, category;
5674 add_class_reference (CLASS_NAME (cat));
5675 cat_name_expr = add_objc_string (CLASS_SUPER_NAME (cat), class_names);
5677 class_name_expr = add_objc_string (CLASS_NAME (cat), class_names);
5679 category = lookup_category (implementation_template,
5680 CLASS_SUPER_NAME (cat));
5682 if (category && CLASS_PROTOCOL_LIST (category))
5684 generate_protocol_references (CLASS_PROTOCOL_LIST (category));
5685 protocol_decl = generate_protocol_list (category);
5690 decl = start_var_decl (objc_category_template,
5691 synth_id_with_class_suffix
5692 ("_OBJC_CATEGORY", objc_implementation_context));
5694 initlist = build_category_initializer (TREE_TYPE (decl),
5695 cat_name_expr, class_name_expr,
5696 UOBJC_INSTANCE_METHODS_decl,
5697 UOBJC_CLASS_METHODS_decl,
5700 finish_var_decl (decl, initlist);
5703 /* static struct objc_class _OBJC_METACLASS_Foo={ ... };
5704 static struct objc_class _OBJC_CLASS_Foo={ ... }; */
5707 generate_shared_structures (int cls_flags)
5709 tree sc_spec, decl_specs, decl;
5710 tree name_expr, super_expr, root_expr;
5711 tree my_root_id = NULL_TREE, my_super_id = NULL_TREE;
5712 tree cast_type, initlist, protocol_decl;
5714 my_super_id = CLASS_SUPER_NAME (implementation_template);
5717 add_class_reference (my_super_id);
5719 /* Compute "my_root_id" - this is required for code generation.
5720 the "isa" for all meta class structures points to the root of
5721 the inheritance hierarchy (e.g. "__Object")... */
5722 my_root_id = my_super_id;
5725 tree my_root_int = lookup_interface (my_root_id);
5727 if (my_root_int && CLASS_SUPER_NAME (my_root_int))
5728 my_root_id = CLASS_SUPER_NAME (my_root_int);
5735 /* No super class. */
5736 my_root_id = CLASS_NAME (implementation_template);
5738 cast_type = build_pointer_type (objc_class_template);
5739 name_expr = add_objc_string (CLASS_NAME (implementation_template),
5742 /* Install class `isa' and `super' pointers at runtime. */
5745 super_expr = add_objc_string (my_super_id, class_names);
5746 super_expr = build_c_cast (cast_type, super_expr); /* cast! */
5749 super_expr = build_int_cst (NULL_TREE, 0);
5751 root_expr = add_objc_string (my_root_id, class_names);
5752 root_expr = build_c_cast (cast_type, root_expr); /* cast! */
5754 if (CLASS_PROTOCOL_LIST (implementation_template))
5756 generate_protocol_references
5757 (CLASS_PROTOCOL_LIST (implementation_template));
5758 protocol_decl = generate_protocol_list (implementation_template);
5763 /* static struct objc_class _OBJC_METACLASS_Foo = { ... }; */
5765 sc_spec = build_tree_list (NULL_TREE, ridpointers[(int) RID_STATIC]);
5766 decl_specs = tree_cons (NULL_TREE, objc_class_template, sc_spec);
5768 decl = start_var_decl (objc_class_template,
5770 (DECL_NAME (UOBJC_METACLASS_decl)));
5773 = build_shared_structure_initializer
5775 root_expr, super_expr, name_expr,
5776 convert (integer_type_node, TYPE_SIZE_UNIT (objc_class_template)),
5778 UOBJC_CLASS_METHODS_decl,
5779 UOBJC_CLASS_VARIABLES_decl,
5782 finish_var_decl (decl, initlist);
5784 /* static struct objc_class _OBJC_CLASS_Foo={ ... }; */
5786 decl = start_var_decl (objc_class_template,
5788 (DECL_NAME (UOBJC_CLASS_decl)));
5791 = build_shared_structure_initializer
5793 build_unary_op (ADDR_EXPR, UOBJC_METACLASS_decl, 0),
5794 super_expr, name_expr,
5795 convert (integer_type_node,
5796 TYPE_SIZE_UNIT (CLASS_STATIC_TEMPLATE
5797 (implementation_template))),
5798 1 /*CLS_FACTORY*/ | cls_flags,
5799 UOBJC_INSTANCE_METHODS_decl,
5800 UOBJC_INSTANCE_VARIABLES_decl,
5803 finish_var_decl (decl, initlist);
5808 synth_id_with_class_suffix (const char *preamble, tree ctxt)
5810 static char string[BUFSIZE];
5812 if (TREE_CODE (ctxt) == CLASS_IMPLEMENTATION_TYPE
5813 || TREE_CODE (ctxt) == CLASS_INTERFACE_TYPE)
5815 sprintf (string, "%s_%s", preamble,
5816 IDENTIFIER_POINTER (CLASS_NAME (ctxt)));
5818 else if (TREE_CODE (ctxt) == CATEGORY_IMPLEMENTATION_TYPE
5819 || TREE_CODE (ctxt) == CATEGORY_INTERFACE_TYPE)
5821 /* We have a category. */
5822 const char *const class_name
5823 = IDENTIFIER_POINTER (CLASS_NAME (objc_implementation_context));
5824 const char *const class_super_name
5825 = IDENTIFIER_POINTER (CLASS_SUPER_NAME (objc_implementation_context));
5826 sprintf (string, "%s_%s_%s", preamble, class_name, class_super_name);
5828 else if (TREE_CODE (ctxt) == PROTOCOL_INTERFACE_TYPE)
5830 const char *protocol_name = IDENTIFIER_POINTER (PROTOCOL_NAME (ctxt));
5831 sprintf (string, "%s_%s", preamble, protocol_name);
5839 /* If type is empty or only type qualifiers are present, add default
5840 type of id (otherwise grokdeclarator will default to int). */
5843 adjust_type_for_id_default (tree type)
5846 type = make_node (TREE_LIST);
5848 if (!TREE_VALUE (type))
5849 TREE_VALUE (type) = objc_object_type;
5850 else if (TREE_CODE (TREE_VALUE (type)) == RECORD_TYPE
5851 && TYPED_OBJECT (TREE_VALUE (type)))
5852 error ("can not use an object as parameter to a method");
5859 selector ':' '(' typename ')' identifier
5862 Transform an Objective-C keyword argument into
5863 the C equivalent parameter declarator.
5865 In: key_name, an "identifier_node" (optional).
5866 arg_type, a "tree_list" (optional).
5867 arg_name, an "identifier_node".
5869 Note: It would be really nice to strongly type the preceding
5870 arguments in the function prototype; however, then I
5871 could not use the "accessor" macros defined in "tree.h".
5873 Out: an instance of "keyword_decl". */
5876 objc_build_keyword_decl (tree key_name, tree arg_type, tree arg_name)
5880 /* If no type is specified, default to "id". */
5881 arg_type = adjust_type_for_id_default (arg_type);
5883 keyword_decl = make_node (KEYWORD_DECL);
5885 TREE_TYPE (keyword_decl) = arg_type;
5886 KEYWORD_ARG_NAME (keyword_decl) = arg_name;
5887 KEYWORD_KEY_NAME (keyword_decl) = key_name;
5889 return keyword_decl;
5892 /* Given a chain of keyword_decl's, synthesize the full keyword selector. */
5895 build_keyword_selector (tree selector)
5898 tree key_chain, key_name;
5901 /* Scan the selector to see how much space we'll need. */
5902 for (key_chain = selector; key_chain; key_chain = TREE_CHAIN (key_chain))
5904 if (TREE_CODE (selector) == KEYWORD_DECL)
5905 key_name = KEYWORD_KEY_NAME (key_chain);
5906 else if (TREE_CODE (selector) == TREE_LIST)
5907 key_name = TREE_PURPOSE (key_chain);
5912 len += IDENTIFIER_LENGTH (key_name) + 1;
5914 /* Just a ':' arg. */
5918 buf = (char *) alloca (len + 1);
5919 /* Start the buffer out as an empty string. */
5922 for (key_chain = selector; key_chain; key_chain = TREE_CHAIN (key_chain))
5924 if (TREE_CODE (selector) == KEYWORD_DECL)
5925 key_name = KEYWORD_KEY_NAME (key_chain);
5926 else if (TREE_CODE (selector) == TREE_LIST)
5928 key_name = TREE_PURPOSE (key_chain);
5929 /* The keyword decl chain will later be used as a function argument
5930 chain. Unhook the selector itself so as to not confuse other
5931 parts of the compiler. */
5932 TREE_PURPOSE (key_chain) = NULL_TREE;
5938 strcat (buf, IDENTIFIER_POINTER (key_name));
5942 return get_identifier (buf);
5945 /* Used for declarations and definitions. */
5948 build_method_decl (enum tree_code code, tree ret_type, tree selector,
5949 tree add_args, bool ellipsis)
5953 /* If no type is specified, default to "id". */
5954 ret_type = adjust_type_for_id_default (ret_type);
5956 method_decl = make_node (code);
5957 TREE_TYPE (method_decl) = ret_type;
5959 /* If we have a keyword selector, create an identifier_node that
5960 represents the full selector name (`:' included)... */
5961 if (TREE_CODE (selector) == KEYWORD_DECL)
5963 METHOD_SEL_NAME (method_decl) = build_keyword_selector (selector);
5964 METHOD_SEL_ARGS (method_decl) = selector;
5965 METHOD_ADD_ARGS (method_decl) = add_args;
5966 METHOD_ADD_ARGS_ELLIPSIS_P (method_decl) = ellipsis;
5970 METHOD_SEL_NAME (method_decl) = selector;
5971 METHOD_SEL_ARGS (method_decl) = NULL_TREE;
5972 METHOD_ADD_ARGS (method_decl) = NULL_TREE;
5978 #define METHOD_DEF 0
5979 #define METHOD_REF 1
5981 /* Used by `build_objc_method_call' and `comp_proto_with_proto'. Return
5982 an argument list for method METH. CONTEXT is either METHOD_DEF or
5983 METHOD_REF, saying whether we are trying to define a method or call
5984 one. SUPERFLAG says this is for a send to super; this makes a
5985 difference for the NeXT calling sequence in which the lookup and
5986 the method call are done together. If METH is null, user-defined
5987 arguments (i.e., beyond self and _cmd) shall be represented by `...'. */
5990 get_arg_type_list (tree meth, int context, int superflag)
5994 /* Receiver type. */
5995 if (flag_next_runtime && superflag)
5996 arglist = build_tree_list (NULL_TREE, objc_super_type);
5997 else if (context == METHOD_DEF && TREE_CODE (meth) == INSTANCE_METHOD_DECL)
5998 arglist = build_tree_list (NULL_TREE, objc_instance_type);
6000 arglist = build_tree_list (NULL_TREE, objc_object_type);
6002 /* Selector type - will eventually change to `int'. */
6003 chainon (arglist, build_tree_list (NULL_TREE, objc_selector_type));
6005 /* No actual method prototype given -- assume that remaining arguments
6010 /* Build a list of argument types. */
6011 for (akey = METHOD_SEL_ARGS (meth); akey; akey = TREE_CHAIN (akey))
6013 tree arg_type = TREE_VALUE (TREE_TYPE (akey));
6015 /* Decay arrays and functions into pointers. */
6016 if (TREE_CODE (arg_type) == ARRAY_TYPE)
6017 arg_type = build_pointer_type (TREE_TYPE (arg_type));
6018 else if (TREE_CODE (arg_type) == FUNCTION_TYPE)
6019 arg_type = build_pointer_type (arg_type);
6021 chainon (arglist, build_tree_list (NULL_TREE, arg_type));
6024 if (METHOD_ADD_ARGS (meth))
6026 for (akey = TREE_CHAIN (METHOD_ADD_ARGS (meth));
6027 akey; akey = TREE_CHAIN (akey))
6029 tree arg_type = TREE_TYPE (TREE_VALUE (akey));
6031 chainon (arglist, build_tree_list (NULL_TREE, arg_type));
6034 if (!METHOD_ADD_ARGS_ELLIPSIS_P (meth))
6035 goto lack_of_ellipsis;
6040 chainon (arglist, OBJC_VOID_AT_END);
6047 check_duplicates (hash hsh, int methods, int is_class)
6049 tree meth = NULL_TREE;
6057 /* We have two or more methods with the same name but
6061 /* But just how different are those types? If
6062 -Wno-strict-selector-match is specified, we shall not
6063 complain if the differences are solely among types with
6064 identical size and alignment. */
6065 if (!warn_strict_selector_match)
6067 for (loop = hsh->list; loop; loop = loop->next)
6068 if (!comp_proto_with_proto (meth, loop->value, 0))
6075 warning (0, "multiple %s named %<%c%s%> found",
6076 methods ? "methods" : "selectors",
6077 (is_class ? '+' : '-'),
6078 IDENTIFIER_POINTER (METHOD_SEL_NAME (meth)));
6080 warn_with_method (methods ? "using" : "found",
6081 ((TREE_CODE (meth) == INSTANCE_METHOD_DECL)
6085 for (loop = hsh->list; loop; loop = loop->next)
6086 warn_with_method ("also found",
6087 ((TREE_CODE (loop->value) == INSTANCE_METHOD_DECL)
6096 /* If RECEIVER is a class reference, return the identifier node for
6097 the referenced class. RECEIVER is created by objc_get_class_reference,
6098 so we check the exact form created depending on which runtimes are
6102 receiver_is_class_object (tree receiver, int self, int super)
6104 tree chain, exp, arg;
6106 /* The receiver is 'self' or 'super' in the context of a class method. */
6107 if (objc_method_context
6108 && TREE_CODE (objc_method_context) == CLASS_METHOD_DECL
6111 ? CLASS_SUPER_NAME (implementation_template)
6112 : CLASS_NAME (implementation_template));
6114 if (flag_next_runtime)
6116 /* The receiver is a variable created by
6117 build_class_reference_decl. */
6118 if (TREE_CODE (receiver) == VAR_DECL && IS_CLASS (TREE_TYPE (receiver)))
6119 /* Look up the identifier. */
6120 for (chain = cls_ref_chain; chain; chain = TREE_CHAIN (chain))
6121 if (TREE_PURPOSE (chain) == receiver)
6122 return TREE_VALUE (chain);
6125 /* The receiver is a function call that returns an id. Check if
6126 it is a call to objc_getClass, if so, pick up the class name. */
6127 if (TREE_CODE (receiver) == CALL_EXPR
6128 && (exp = CALL_EXPR_FN (receiver))
6129 && TREE_CODE (exp) == ADDR_EXPR
6130 && (exp = TREE_OPERAND (exp, 0))
6131 && TREE_CODE (exp) == FUNCTION_DECL
6132 /* For some reason, we sometimes wind up with multiple FUNCTION_DECL
6133 prototypes for objc_get_class(). Thankfully, they seem to share the
6134 same function type. */
6135 && TREE_TYPE (exp) == TREE_TYPE (objc_get_class_decl)
6136 && !strcmp (IDENTIFIER_POINTER (DECL_NAME (exp)), TAG_GETCLASS)
6137 /* We have a call to objc_get_class/objc_getClass! */
6138 && (arg = CALL_EXPR_ARG (receiver, 0)))
6141 if (TREE_CODE (arg) == ADDR_EXPR
6142 && (arg = TREE_OPERAND (arg, 0))
6143 && TREE_CODE (arg) == STRING_CST)
6144 /* Finally, we have the class name. */
6145 return get_identifier (TREE_STRING_POINTER (arg));
6150 /* If we are currently building a message expr, this holds
6151 the identifier of the selector of the message. This is
6152 used when printing warnings about argument mismatches. */
6154 static tree current_objc_message_selector = 0;
6157 objc_message_selector (void)
6159 return current_objc_message_selector;
6162 /* Construct an expression for sending a message.
6163 MESS has the object to send to in TREE_PURPOSE
6164 and the argument list (including selector) in TREE_VALUE.
6166 (*(<abstract_decl>(*)())_msg)(receiver, selTransTbl[n], ...);
6167 (*(<abstract_decl>(*)())_msgSuper)(receiver, selTransTbl[n], ...); */
6170 objc_build_message_expr (tree mess)
6172 tree receiver = TREE_PURPOSE (mess);
6175 tree args = TREE_PURPOSE (TREE_VALUE (mess));
6177 tree args = TREE_VALUE (mess);
6179 tree method_params = NULL_TREE;
6181 if (TREE_CODE (receiver) == ERROR_MARK)
6182 return error_mark_node;
6184 /* Obtain the full selector name. */
6185 if (TREE_CODE (args) == IDENTIFIER_NODE)
6186 /* A unary selector. */
6188 else if (TREE_CODE (args) == TREE_LIST)
6189 sel_name = build_keyword_selector (args);
6193 /* Build the parameter list to give to the method. */
6194 if (TREE_CODE (args) == TREE_LIST)
6196 method_params = chainon (args, TREE_VALUE (TREE_VALUE (mess)));
6199 tree chain = args, prev = NULL_TREE;
6201 /* We have a keyword selector--check for comma expressions. */
6204 tree element = TREE_VALUE (chain);
6206 /* We have a comma expression, must collapse... */
6207 if (TREE_CODE (element) == TREE_LIST)
6210 TREE_CHAIN (prev) = element;
6215 chain = TREE_CHAIN (chain);
6217 method_params = args;
6222 if (processing_template_decl)
6223 /* Must wait until template instantiation time. */
6224 return build_min_nt (MESSAGE_SEND_EXPR, receiver, sel_name,
6228 return objc_finish_message_expr (receiver, sel_name, method_params);
6231 /* Look up method SEL_NAME that would be suitable for receiver
6232 of type 'id' (if IS_CLASS is zero) or 'Class' (if IS_CLASS is
6233 nonzero), and report on any duplicates. */
6236 lookup_method_in_hash_lists (tree sel_name, int is_class)
6238 hash method_prototype = NULL;
6241 method_prototype = hash_lookup (nst_method_hash_list,
6244 if (!method_prototype)
6246 method_prototype = hash_lookup (cls_method_hash_list,
6251 return check_duplicates (method_prototype, 1, is_class);
6254 /* The 'objc_finish_message_expr' routine is called from within
6255 'objc_build_message_expr' for non-template functions. In the case of
6256 C++ template functions, it is called from 'build_expr_from_tree'
6257 (in decl2.c) after RECEIVER and METHOD_PARAMS have been expanded. */
6260 objc_finish_message_expr (tree receiver, tree sel_name, tree method_params)
6262 tree method_prototype = NULL_TREE, rprotos = NULL_TREE, rtype;
6263 tree selector, retval, class_tree;
6264 int self, super, have_cast;
6266 /* Extract the receiver of the message, as well as its type
6267 (where the latter may take the form of a cast or be inferred
6268 from the implementation context). */
6270 while (TREE_CODE (rtype) == COMPOUND_EXPR
6271 || TREE_CODE (rtype) == MODIFY_EXPR
6272 || CONVERT_EXPR_P (rtype)
6273 || TREE_CODE (rtype) == COMPONENT_REF)
6274 rtype = TREE_OPERAND (rtype, 0);
6275 self = (rtype == self_decl);
6276 super = (rtype == UOBJC_SUPER_decl);
6277 rtype = TREE_TYPE (receiver);
6278 have_cast = (TREE_CODE (receiver) == NOP_EXPR
6279 || (TREE_CODE (receiver) == COMPOUND_EXPR
6280 && !IS_SUPER (rtype)));
6282 /* If we are calling [super dealloc], reset our warning flag. */
6283 if (super && !strcmp ("dealloc", IDENTIFIER_POINTER (sel_name)))
6284 should_call_super_dealloc = 0;
6286 /* If the receiver is a class object, retrieve the corresponding
6287 @interface, if one exists. */
6288 class_tree = receiver_is_class_object (receiver, self, super);
6290 /* Now determine the receiver type (if an explicit cast has not been
6295 rtype = lookup_interface (class_tree);
6296 /* Handle `self' and `super'. */
6299 if (!CLASS_SUPER_NAME (implementation_template))
6301 error ("no super class declared in @interface for %qs",
6302 IDENTIFIER_POINTER (CLASS_NAME (implementation_template)));
6303 return error_mark_node;
6305 rtype = lookup_interface (CLASS_SUPER_NAME (implementation_template));
6308 rtype = lookup_interface (CLASS_NAME (implementation_template));
6311 /* If receiver is of type `id' or `Class' (or if the @interface for a
6312 class is not visible), we shall be satisfied with the existence of
6313 any instance or class method. */
6314 if (objc_is_id (rtype))
6316 class_tree = (IS_CLASS (rtype) ? objc_class_name : NULL_TREE);
6317 rprotos = (TYPE_HAS_OBJC_INFO (TREE_TYPE (rtype))
6318 ? TYPE_OBJC_PROTOCOL_LIST (TREE_TYPE (rtype))
6324 /* If messaging 'id <Protos>' or 'Class <Proto>', first search
6325 in protocols themselves for the method prototype. */
6327 = lookup_method_in_protocol_list (rprotos, sel_name,
6328 class_tree != NULL_TREE);
6330 /* If messaging 'Class <Proto>' but did not find a class method
6331 prototype, search for an instance method instead, and warn
6332 about having done so. */
6333 if (!method_prototype && !rtype && class_tree != NULL_TREE)
6336 = lookup_method_in_protocol_list (rprotos, sel_name, 0);
6338 if (method_prototype)
6339 warning (0, "found %<-%s%> instead of %<+%s%> in protocol(s)",
6340 IDENTIFIER_POINTER (sel_name),
6341 IDENTIFIER_POINTER (sel_name));
6347 tree orig_rtype = rtype, saved_rtype;
6349 if (TREE_CODE (rtype) == POINTER_TYPE)
6350 rtype = TREE_TYPE (rtype);
6351 /* Traverse typedef aliases */
6352 while (TREE_CODE (rtype) == RECORD_TYPE && OBJC_TYPE_NAME (rtype)
6353 && TREE_CODE (OBJC_TYPE_NAME (rtype)) == TYPE_DECL
6354 && DECL_ORIGINAL_TYPE (OBJC_TYPE_NAME (rtype)))
6355 rtype = DECL_ORIGINAL_TYPE (OBJC_TYPE_NAME (rtype));
6356 saved_rtype = rtype;
6357 if (TYPED_OBJECT (rtype))
6359 rprotos = TYPE_OBJC_PROTOCOL_LIST (rtype);
6360 rtype = TYPE_OBJC_INTERFACE (rtype);
6362 /* If we could not find an @interface declaration, we must have
6363 only seen a @class declaration; so, we cannot say anything
6364 more intelligent about which methods the receiver will
6366 if (!rtype || TREE_CODE (rtype) == IDENTIFIER_NODE)
6368 else if (TREE_CODE (rtype) == CLASS_INTERFACE_TYPE
6369 || TREE_CODE (rtype) == CLASS_IMPLEMENTATION_TYPE)
6371 /* We have a valid ObjC class name. Look up the method name
6372 in the published @interface for the class (and its
6375 = lookup_method_static (rtype, sel_name, class_tree != NULL_TREE);
6377 /* If the method was not found in the @interface, it may still
6378 exist locally as part of the @implementation. */
6379 if (!method_prototype && objc_implementation_context
6380 && CLASS_NAME (objc_implementation_context)
6381 == OBJC_TYPE_NAME (rtype))
6385 ? CLASS_CLS_METHODS (objc_implementation_context)
6386 : CLASS_NST_METHODS (objc_implementation_context)),
6389 /* If we haven't found a candidate method by now, try looking for
6390 it in the protocol list. */
6391 if (!method_prototype && rprotos)
6393 = lookup_method_in_protocol_list (rprotos, sel_name,
6394 class_tree != NULL_TREE);
6398 warning (0, "invalid receiver type %qs",
6399 gen_type_name (orig_rtype));
6400 /* After issuing the "invalid receiver" warning, perform method
6401 lookup as if we were messaging 'id'. */
6402 rtype = rprotos = NULL_TREE;
6407 /* For 'id' or 'Class' receivers, search in the global hash table
6408 as a last resort. For all receivers, warn if protocol searches
6410 if (!method_prototype)
6413 warning (0, "%<%c%s%> not found in protocol(s)",
6414 (class_tree ? '+' : '-'),
6415 IDENTIFIER_POINTER (sel_name));
6419 = lookup_method_in_hash_lists (sel_name, class_tree != NULL_TREE);
6422 if (!method_prototype)
6424 static bool warn_missing_methods = false;
6427 warning (0, "%qs may not respond to %<%c%s%>",
6428 IDENTIFIER_POINTER (OBJC_TYPE_NAME (rtype)),
6429 (class_tree ? '+' : '-'),
6430 IDENTIFIER_POINTER (sel_name));
6431 /* If we are messaging an 'id' or 'Class' object and made it here,
6432 then we have failed to find _any_ instance or class method,
6435 warning (0, "no %<%c%s%> method found",
6436 (class_tree ? '+' : '-'),
6437 IDENTIFIER_POINTER (sel_name));
6439 if (!warn_missing_methods)
6441 warning (0, "(Messages without a matching method signature");
6442 warning (0, "will be assumed to return %<id%> and accept");
6443 warning (0, "%<...%> as arguments.)");
6444 warn_missing_methods = true;
6448 /* Save the selector name for printing error messages. */
6449 current_objc_message_selector = sel_name;
6451 /* Build the parameters list for looking up the method.
6452 These are the object itself and the selector. */
6454 if (flag_typed_selectors)
6455 selector = build_typed_selector_reference (sel_name, method_prototype);
6457 selector = build_selector_reference (sel_name);
6459 retval = build_objc_method_call (super, method_prototype,
6461 selector, method_params);
6463 current_objc_message_selector = 0;
6468 /* Build a tree expression to send OBJECT the operation SELECTOR,
6469 looking up the method on object LOOKUP_OBJECT (often same as OBJECT),
6470 assuming the method has prototype METHOD_PROTOTYPE.
6471 (That is an INSTANCE_METHOD_DECL or CLASS_METHOD_DECL.)
6472 Use METHOD_PARAMS as list of args to pass to the method.
6473 If SUPER_FLAG is nonzero, we look up the superclass's method. */
6476 build_objc_method_call (int super_flag, tree method_prototype,
6477 tree lookup_object, tree selector,
6480 tree sender = (super_flag ? umsg_super_decl :
6481 (!flag_next_runtime || flag_nil_receivers
6482 ? (flag_objc_direct_dispatch
6485 : umsg_nonnil_decl));
6486 tree rcv_p = (super_flag ? objc_super_type : objc_object_type);
6488 /* If a prototype for the method to be called exists, then cast
6489 the sender's return type and arguments to match that of the method.
6490 Otherwise, leave sender as is. */
6493 ? TREE_VALUE (TREE_TYPE (method_prototype))
6494 : objc_object_type);
6496 = build_pointer_type
6497 (build_function_type
6500 (method_prototype, METHOD_REF, super_flag)));
6503 lookup_object = build_c_cast (rcv_p, lookup_object);
6505 /* Use SAVE_EXPR to avoid evaluating the receiver twice. */
6506 lookup_object = save_expr (lookup_object);
6508 if (flag_next_runtime)
6510 /* If we are returning a struct in memory, and the address
6511 of that memory location is passed as a hidden first
6512 argument, then change which messenger entry point this
6513 expr will call. NB: Note that sender_cast remains
6514 unchanged (it already has a struct return type). */
6515 if (!targetm.calls.struct_value_rtx (0, 0)
6516 && (TREE_CODE (ret_type) == RECORD_TYPE
6517 || TREE_CODE (ret_type) == UNION_TYPE)
6518 && targetm.calls.return_in_memory (ret_type, 0))
6519 sender = (super_flag ? umsg_super_stret_decl :
6520 flag_nil_receivers ? umsg_stret_decl : umsg_nonnil_stret_decl);
6522 method_params = tree_cons (NULL_TREE, lookup_object,
6523 tree_cons (NULL_TREE, selector,
6525 method = build_fold_addr_expr (sender);
6529 /* This is the portable (GNU) way. */
6532 /* First, call the lookup function to get a pointer to the method,
6533 then cast the pointer, then call it with the method arguments. */
6535 object = (super_flag ? self_decl : lookup_object);
6537 t = tree_cons (NULL_TREE, selector, NULL_TREE);
6538 t = tree_cons (NULL_TREE, lookup_object, t);
6539 method = build_function_call (sender, t);
6541 /* Pass the object to the method. */
6542 method_params = tree_cons (NULL_TREE, object,
6543 tree_cons (NULL_TREE, selector,
6547 /* ??? Selector is not at this point something we can use inside
6548 the compiler itself. Set it to garbage for the nonce. */
6549 t = build3 (OBJ_TYPE_REF, sender_cast, method, lookup_object, size_zero_node);
6550 return build_function_call (t, method_params);
6554 build_protocol_reference (tree p)
6557 const char *proto_name;
6559 /* static struct _objc_protocol _OBJC_PROTOCOL_<mumble>; */
6561 proto_name = synth_id_with_class_suffix ("_OBJC_PROTOCOL", p);
6562 decl = start_var_decl (objc_protocol_template, proto_name);
6564 PROTOCOL_FORWARD_DECL (p) = decl;
6567 /* This function is called by the parser when (and only when) a
6568 @protocol() expression is found, in order to compile it. */
6570 objc_build_protocol_expr (tree protoname)
6573 tree p = lookup_protocol (protoname);
6577 error ("cannot find protocol declaration for %qs",
6578 IDENTIFIER_POINTER (protoname));
6579 return error_mark_node;
6582 if (!PROTOCOL_FORWARD_DECL (p))
6583 build_protocol_reference (p);
6585 expr = build_unary_op (ADDR_EXPR, PROTOCOL_FORWARD_DECL (p), 0);
6587 /* ??? Ideally we'd build the reference with objc_protocol_type directly,
6588 if we have it, rather than converting it here. */
6589 expr = convert (objc_protocol_type, expr);
6591 /* The @protocol() expression is being compiled into a pointer to a
6592 statically allocated instance of the Protocol class. To become
6593 usable at runtime, the 'isa' pointer of the instance need to be
6594 fixed up at runtime by the runtime library, to point to the
6595 actual 'Protocol' class. */
6597 /* For the GNU runtime, put the static Protocol instance in the list
6598 of statically allocated instances, so that we make sure that its
6599 'isa' pointer is fixed up at runtime by the GNU runtime library
6600 to point to the Protocol class (at runtime, when loading the
6601 module, the GNU runtime library loops on the statically allocated
6602 instances (as found in the defs field in objc_symtab) and fixups
6603 all the 'isa' pointers of those objects). */
6604 if (! flag_next_runtime)
6606 /* This type is a struct containing the fields of a Protocol
6607 object. (Cfr. objc_protocol_type instead is the type of a pointer
6608 to such a struct). */
6609 tree protocol_struct_type = xref_tag
6610 (RECORD_TYPE, get_identifier (PROTOCOL_OBJECT_CLASS_NAME));
6613 /* Look for the list of Protocol statically allocated instances
6614 to fixup at runtime. Create a new list to hold Protocol
6615 statically allocated instances, if the list is not found. At
6616 present there is only another list, holding NSConstantString
6617 static instances to be fixed up at runtime. */
6618 for (chain = &objc_static_instances;
6619 *chain && TREE_VALUE (*chain) != protocol_struct_type;
6620 chain = &TREE_CHAIN (*chain));
6623 *chain = tree_cons (NULL_TREE, protocol_struct_type, NULL_TREE);
6624 add_objc_string (OBJC_TYPE_NAME (protocol_struct_type),
6628 /* Add this statically allocated instance to the Protocol list. */
6629 TREE_PURPOSE (*chain) = tree_cons (NULL_TREE,
6630 PROTOCOL_FORWARD_DECL (p),
6631 TREE_PURPOSE (*chain));
6638 /* This function is called by the parser when a @selector() expression
6639 is found, in order to compile it. It is only called by the parser
6640 and only to compile a @selector(). */
6642 objc_build_selector_expr (tree selnamelist)
6646 /* Obtain the full selector name. */
6647 if (TREE_CODE (selnamelist) == IDENTIFIER_NODE)
6648 /* A unary selector. */
6649 selname = selnamelist;
6650 else if (TREE_CODE (selnamelist) == TREE_LIST)
6651 selname = build_keyword_selector (selnamelist);
6655 /* If we are required to check @selector() expressions as they
6656 are found, check that the selector has been declared. */
6657 if (warn_undeclared_selector)
6659 /* Look the selector up in the list of all known class and
6660 instance methods (up to this line) to check that the selector
6664 /* First try with instance methods. */
6665 hsh = hash_lookup (nst_method_hash_list, selname);
6667 /* If not found, try with class methods. */
6670 hsh = hash_lookup (cls_method_hash_list, selname);
6673 /* If still not found, print out a warning. */
6676 warning (0, "undeclared selector %qs", IDENTIFIER_POINTER (selname));
6681 if (flag_typed_selectors)
6682 return build_typed_selector_reference (selname, 0);
6684 return build_selector_reference (selname);
6688 objc_build_encode_expr (tree type)
6693 encode_type (type, obstack_object_size (&util_obstack),
6694 OBJC_ENCODE_INLINE_DEFS);
6695 obstack_1grow (&util_obstack, 0); /* null terminate string */
6696 string = XOBFINISH (&util_obstack, const char *);
6698 /* Synthesize a string that represents the encoded struct/union. */
6699 result = my_build_string (strlen (string) + 1, string);
6700 obstack_free (&util_obstack, util_firstobj);
6705 build_ivar_reference (tree id)
6707 if (TREE_CODE (objc_method_context) == CLASS_METHOD_DECL)
6709 /* Historically, a class method that produced objects (factory
6710 method) would assign `self' to the instance that it
6711 allocated. This would effectively turn the class method into
6712 an instance method. Following this assignment, the instance
6713 variables could be accessed. That practice, while safe,
6714 violates the simple rule that a class method should not refer
6715 to an instance variable. It's better to catch the cases
6716 where this is done unknowingly than to support the above
6718 warning (0, "instance variable %qs accessed in class method",
6719 IDENTIFIER_POINTER (id));
6720 self_decl = convert (objc_instance_type, self_decl); /* cast */
6723 return objc_build_component_ref (build_indirect_ref (self_decl, "->",
6724 input_location), id);
6727 /* Compute a hash value for a given method SEL_NAME. */
6730 hash_func (tree sel_name)
6732 const unsigned char *s
6733 = (const unsigned char *)IDENTIFIER_POINTER (sel_name);
6737 h = h * 67 + *s++ - 113;
6744 nst_method_hash_list
6745 = (hash *) ggc_alloc_cleared (SIZEHASHTABLE * sizeof (hash));
6746 cls_method_hash_list
6747 = (hash *) ggc_alloc_cleared (SIZEHASHTABLE * sizeof (hash));
6749 /* Initialize the hash table used to hold the constant string objects. */
6750 string_htab = htab_create_ggc (31, string_hash,
6753 /* Initialize the hash table used to hold EH-volatilized types. */
6754 volatilized_htab = htab_create_ggc (31, volatilized_hash,
6755 volatilized_eq, NULL);
6758 /* WARNING!!!! hash_enter is called with a method, and will peek
6759 inside to find its selector! But hash_lookup is given a selector
6760 directly, and looks for the selector that's inside the found
6761 entry's key (method) for comparison. */
6764 hash_enter (hash *hashlist, tree method)
6767 int slot = hash_func (METHOD_SEL_NAME (method)) % SIZEHASHTABLE;
6769 obj = (hash) ggc_alloc (sizeof (struct hashed_entry));
6771 obj->next = hashlist[slot];
6774 hashlist[slot] = obj; /* append to front */
6778 hash_lookup (hash *hashlist, tree sel_name)
6782 target = hashlist[hash_func (sel_name) % SIZEHASHTABLE];
6786 if (sel_name == METHOD_SEL_NAME (target->key))
6789 target = target->next;
6795 hash_add_attr (hash entry, tree value)
6799 obj = (attr) ggc_alloc (sizeof (struct hashed_attribute));
6800 obj->next = entry->list;
6803 entry->list = obj; /* append to front */
6807 lookup_method (tree mchain, tree method)
6811 if (TREE_CODE (method) == IDENTIFIER_NODE)
6814 key = METHOD_SEL_NAME (method);
6818 if (METHOD_SEL_NAME (mchain) == key)
6821 mchain = TREE_CHAIN (mchain);
6826 /* Look up a class (if OBJC_LOOKUP_CLASS is set in FLAGS) or instance method
6827 in INTERFACE, along with any categories and protocols attached thereto.
6828 If method is not found, and the OBJC_LOOKUP_NO_SUPER is _not_ set in FLAGS,
6829 recursively examine the INTERFACE's superclass. If OBJC_LOOKUP_CLASS is
6830 set, OBJC_LOOKUP_NO_SUPER is cleared, and no suitable class method could
6831 be found in INTERFACE or any of its superclasses, look for an _instance_
6832 method of the same name in the root class as a last resort.
6834 If a suitable method cannot be found, return NULL_TREE. */
6837 lookup_method_static (tree interface, tree ident, int flags)
6839 tree meth = NULL_TREE, root_inter = NULL_TREE;
6840 tree inter = interface;
6841 int is_class = (flags & OBJC_LOOKUP_CLASS);
6842 int no_superclasses = (flags & OBJC_LOOKUP_NO_SUPER);
6846 tree chain = is_class ? CLASS_CLS_METHODS (inter) : CLASS_NST_METHODS (inter);
6847 tree category = inter;
6849 /* First, look up the method in the class itself. */
6850 if ((meth = lookup_method (chain, ident)))
6853 /* Failing that, look for the method in each category of the class. */
6854 while ((category = CLASS_CATEGORY_LIST (category)))
6856 chain = is_class ? CLASS_CLS_METHODS (category) : CLASS_NST_METHODS (category);
6858 /* Check directly in each category. */
6859 if ((meth = lookup_method (chain, ident)))
6862 /* Failing that, check in each category's protocols. */
6863 if (CLASS_PROTOCOL_LIST (category))
6865 if ((meth = (lookup_method_in_protocol_list
6866 (CLASS_PROTOCOL_LIST (category), ident, is_class))))
6871 /* If not found in categories, check in protocols of the main class. */
6872 if (CLASS_PROTOCOL_LIST (inter))
6874 if ((meth = (lookup_method_in_protocol_list
6875 (CLASS_PROTOCOL_LIST (inter), ident, is_class))))
6879 /* If we were instructed not to look in superclasses, don't. */
6880 if (no_superclasses)
6883 /* Failing that, climb up the inheritance hierarchy. */
6885 inter = lookup_interface (CLASS_SUPER_NAME (inter));
6889 /* If no class (factory) method was found, check if an _instance_
6890 method of the same name exists in the root class. This is what
6891 the Objective-C runtime will do. If an instance method was not
6893 return is_class ? lookup_method_static (root_inter, ident, 0): NULL_TREE;
6896 /* Add the method to the hash list if it doesn't contain an identical
6900 add_method_to_hash_list (hash *hash_list, tree method)
6904 if (!(hsh = hash_lookup (hash_list, METHOD_SEL_NAME (method))))
6906 /* Install on a global chain. */
6907 hash_enter (hash_list, method);
6911 /* Check types against those; if different, add to a list. */
6913 int already_there = comp_proto_with_proto (method, hsh->key, 1);
6914 for (loop = hsh->list; !already_there && loop; loop = loop->next)
6915 already_there |= comp_proto_with_proto (method, loop->value, 1);
6917 hash_add_attr (hsh, method);
6922 objc_add_method (tree klass, tree method, int is_class)
6926 if (!(mth = lookup_method (is_class
6927 ? CLASS_CLS_METHODS (klass)
6928 : CLASS_NST_METHODS (klass), method)))
6930 /* put method on list in reverse order */
6933 TREE_CHAIN (method) = CLASS_CLS_METHODS (klass);
6934 CLASS_CLS_METHODS (klass) = method;
6938 TREE_CHAIN (method) = CLASS_NST_METHODS (klass);
6939 CLASS_NST_METHODS (klass) = method;
6944 /* When processing an @interface for a class or category, give hard
6945 errors on methods with identical selectors but differing argument
6946 and/or return types. We do not do this for @implementations, because
6947 C/C++ will do it for us (i.e., there will be duplicate function
6948 definition errors). */
6949 if ((TREE_CODE (klass) == CLASS_INTERFACE_TYPE
6950 || TREE_CODE (klass) == CATEGORY_INTERFACE_TYPE)
6951 && !comp_proto_with_proto (method, mth, 1))
6952 error ("duplicate declaration of method %<%c%s%>",
6953 is_class ? '+' : '-',
6954 IDENTIFIER_POINTER (METHOD_SEL_NAME (mth)));
6958 add_method_to_hash_list (cls_method_hash_list, method);
6961 add_method_to_hash_list (nst_method_hash_list, method);
6963 /* Instance methods in root classes (and categories thereof)
6964 may act as class methods as a last resort. We also add
6965 instance methods listed in @protocol declarations to
6966 the class hash table, on the assumption that @protocols
6967 may be adopted by root classes or categories. */
6968 if (TREE_CODE (klass) == CATEGORY_INTERFACE_TYPE
6969 || TREE_CODE (klass) == CATEGORY_IMPLEMENTATION_TYPE)
6970 klass = lookup_interface (CLASS_NAME (klass));
6972 if (TREE_CODE (klass) == PROTOCOL_INTERFACE_TYPE
6973 || !CLASS_SUPER_NAME (klass))
6974 add_method_to_hash_list (cls_method_hash_list, method);
6981 add_class (tree class_name, tree name)
6983 struct interface_tuple **slot;
6985 /* Put interfaces on list in reverse order. */
6986 TREE_CHAIN (class_name) = interface_chain;
6987 interface_chain = class_name;
6989 if (interface_htab == NULL)
6990 interface_htab = htab_create_ggc (31, hash_interface, eq_interface, NULL);
6991 slot = (struct interface_tuple **)
6992 htab_find_slot_with_hash (interface_htab, name,
6993 IDENTIFIER_HASH_VALUE (name),
6997 *slot = (struct interface_tuple *) ggc_alloc_cleared (sizeof (struct interface_tuple));
7000 (*slot)->class_name = class_name;
7002 return interface_chain;
7006 add_category (tree klass, tree category)
7008 /* Put categories on list in reverse order. */
7009 tree cat = lookup_category (klass, CLASS_SUPER_NAME (category));
7013 warning (0, "duplicate interface declaration for category %<%s(%s)%>",
7014 IDENTIFIER_POINTER (CLASS_NAME (klass)),
7015 IDENTIFIER_POINTER (CLASS_SUPER_NAME (category)));
7019 CLASS_CATEGORY_LIST (category) = CLASS_CATEGORY_LIST (klass);
7020 CLASS_CATEGORY_LIST (klass) = category;
7024 /* Called after parsing each instance variable declaration. Necessary to
7025 preserve typedefs and implement public/private...
7027 VISIBILITY is 1 for public, 0 for protected, and 2 for private. */
7030 add_instance_variable (tree klass, int visibility, tree field_decl)
7032 tree field_type = TREE_TYPE (field_decl);
7033 const char *ivar_name = DECL_NAME (field_decl)
7034 ? IDENTIFIER_POINTER (DECL_NAME (field_decl))
7038 if (TREE_CODE (field_type) == REFERENCE_TYPE)
7040 error ("illegal reference type specified for instance variable %qs",
7042 /* Return class as is without adding this ivar. */
7047 if (field_type == error_mark_node || !TYPE_SIZE (field_type)
7048 || TYPE_SIZE (field_type) == error_mark_node)
7049 /* 'type[0]' is allowed, but 'type[]' is not! */
7051 error ("instance variable %qs has unknown size", ivar_name);
7052 /* Return class as is without adding this ivar. */
7057 /* Check if the ivar being added has a non-POD C++ type. If so, we will
7058 need to either (1) warn the user about it or (2) generate suitable
7059 constructor/destructor call from '- .cxx_construct' or '- .cxx_destruct'
7060 methods (if '-fobjc-call-cxx-cdtors' was specified). */
7061 if (MAYBE_CLASS_TYPE_P (field_type)
7062 && (TYPE_NEEDS_CONSTRUCTING (field_type)
7063 || TYPE_HAS_NONTRIVIAL_DESTRUCTOR (field_type)
7064 || TYPE_POLYMORPHIC_P (field_type)))
7066 const char *type_name = IDENTIFIER_POINTER (OBJC_TYPE_NAME (field_type));
7068 if (flag_objc_call_cxx_cdtors)
7070 /* Since the ObjC runtime will be calling the constructors and
7071 destructors for us, the only thing we can't handle is the lack
7072 of a default constructor. */
7073 if (TYPE_NEEDS_CONSTRUCTING (field_type)
7074 && !TYPE_HAS_DEFAULT_CONSTRUCTOR (field_type))
7076 warning (0, "type %qs has no default constructor to call",
7079 /* If we cannot call a constructor, we should also avoid
7080 calling the destructor, for symmetry. */
7081 if (TYPE_HAS_NONTRIVIAL_DESTRUCTOR (field_type))
7082 warning (0, "destructor for %qs shall not be run either",
7088 static bool warn_cxx_ivars = false;
7090 if (TYPE_POLYMORPHIC_P (field_type))
7092 /* Vtable pointers are Real Bad(tm), since Obj-C cannot
7094 error ("type %qs has virtual member functions", type_name);
7095 error ("illegal aggregate type %qs specified "
7096 "for instance variable %qs",
7097 type_name, ivar_name);
7098 /* Return class as is without adding this ivar. */
7102 /* User-defined constructors and destructors are not known to Obj-C
7103 and hence will not be called. This may or may not be a problem. */
7104 if (TYPE_NEEDS_CONSTRUCTING (field_type))
7105 warning (0, "type %qs has a user-defined constructor", type_name);
7106 if (TYPE_HAS_NONTRIVIAL_DESTRUCTOR (field_type))
7107 warning (0, "type %qs has a user-defined destructor", type_name);
7109 if (!warn_cxx_ivars)
7111 warning (0, "C++ constructors and destructors will not "
7112 "be invoked for Objective-C fields");
7113 warn_cxx_ivars = true;
7119 /* Overload the public attribute, it is not used for FIELD_DECLs. */
7123 TREE_PUBLIC (field_decl) = 0;
7124 TREE_PRIVATE (field_decl) = 0;
7125 TREE_PROTECTED (field_decl) = 1;
7129 TREE_PUBLIC (field_decl) = 1;
7130 TREE_PRIVATE (field_decl) = 0;
7131 TREE_PROTECTED (field_decl) = 0;
7135 TREE_PUBLIC (field_decl) = 0;
7136 TREE_PRIVATE (field_decl) = 1;
7137 TREE_PROTECTED (field_decl) = 0;
7142 CLASS_RAW_IVARS (klass) = chainon (CLASS_RAW_IVARS (klass), field_decl);
7148 is_ivar (tree decl_chain, tree ident)
7150 for ( ; decl_chain; decl_chain = TREE_CHAIN (decl_chain))
7151 if (DECL_NAME (decl_chain) == ident)
7156 /* True if the ivar is private and we are not in its implementation. */
7159 is_private (tree decl)
7161 return (TREE_PRIVATE (decl)
7162 && ! is_ivar (CLASS_IVARS (implementation_template),
7166 /* We have an instance variable reference;, check to see if it is public. */
7169 objc_is_public (tree expr, tree identifier)
7171 tree basetype, decl;
7174 if (processing_template_decl)
7178 if (TREE_TYPE (expr) == error_mark_node)
7181 basetype = TYPE_MAIN_VARIANT (TREE_TYPE (expr));
7183 if (basetype && TREE_CODE (basetype) == RECORD_TYPE)
7185 if (TYPE_HAS_OBJC_INFO (basetype) && TYPE_OBJC_INTERFACE (basetype))
7187 tree klass = lookup_interface (OBJC_TYPE_NAME (basetype));
7191 error ("cannot find interface declaration for %qs",
7192 IDENTIFIER_POINTER (OBJC_TYPE_NAME (basetype)));
7196 if ((decl = is_ivar (get_class_ivars (klass, true), identifier)))
7198 if (TREE_PUBLIC (decl))
7201 /* Important difference between the Stepstone translator:
7202 all instance variables should be public within the context
7203 of the implementation. */
7204 if (objc_implementation_context
7205 && ((TREE_CODE (objc_implementation_context)
7206 == CLASS_IMPLEMENTATION_TYPE)
7207 || (TREE_CODE (objc_implementation_context)
7208 == CATEGORY_IMPLEMENTATION_TYPE)))
7210 tree curtype = TYPE_MAIN_VARIANT
7211 (CLASS_STATIC_TEMPLATE
7212 (implementation_template));
7214 if (basetype == curtype
7215 || DERIVED_FROM_P (basetype, curtype))
7217 int priv = is_private (decl);
7220 error ("instance variable %qs is declared private",
7221 IDENTIFIER_POINTER (DECL_NAME (decl)));
7227 /* The 2.95.2 compiler sometimes allowed C functions to access
7228 non-@public ivars. We will let this slide for now... */
7229 if (!objc_method_context)
7231 warning (0, "instance variable %qs is %s; "
7232 "this will be a hard error in the future",
7233 IDENTIFIER_POINTER (identifier),
7234 TREE_PRIVATE (decl) ? "@private" : "@protected");
7238 error ("instance variable %qs is declared %s",
7239 IDENTIFIER_POINTER (identifier),
7240 TREE_PRIVATE (decl) ? "private" : "protected");
7249 /* Make sure all entries in CHAIN are also in LIST. */
7252 check_methods (tree chain, tree list, int mtype)
7258 if (!lookup_method (list, chain))
7262 if (TREE_CODE (objc_implementation_context)
7263 == CLASS_IMPLEMENTATION_TYPE)
7264 warning (0, "incomplete implementation of class %qs",
7265 IDENTIFIER_POINTER (CLASS_NAME (objc_implementation_context)));
7266 else if (TREE_CODE (objc_implementation_context)
7267 == CATEGORY_IMPLEMENTATION_TYPE)
7268 warning (0, "incomplete implementation of category %qs",
7269 IDENTIFIER_POINTER (CLASS_SUPER_NAME (objc_implementation_context)));
7273 warning (0, "method definition for %<%c%s%> not found",
7274 mtype, IDENTIFIER_POINTER (METHOD_SEL_NAME (chain)));
7277 chain = TREE_CHAIN (chain);
7283 /* Check if KLASS, or its superclasses, explicitly conforms to PROTOCOL. */
7286 conforms_to_protocol (tree klass, tree protocol)
7288 if (TREE_CODE (protocol) == PROTOCOL_INTERFACE_TYPE)
7290 tree p = CLASS_PROTOCOL_LIST (klass);
7291 while (p && TREE_VALUE (p) != protocol)
7296 tree super = (CLASS_SUPER_NAME (klass)
7297 ? lookup_interface (CLASS_SUPER_NAME (klass))
7299 int tmp = super ? conforms_to_protocol (super, protocol) : 0;
7308 /* Make sure all methods in CHAIN are accessible as MTYPE methods in
7309 CONTEXT. This is one of two mechanisms to check protocol integrity. */
7312 check_methods_accessible (tree chain, tree context, int mtype)
7316 tree base_context = context;
7320 context = base_context;
7324 list = CLASS_CLS_METHODS (context);
7326 list = CLASS_NST_METHODS (context);
7328 if (lookup_method (list, chain))
7331 else if (TREE_CODE (context) == CLASS_IMPLEMENTATION_TYPE
7332 || TREE_CODE (context) == CLASS_INTERFACE_TYPE)
7333 context = (CLASS_SUPER_NAME (context)
7334 ? lookup_interface (CLASS_SUPER_NAME (context))
7337 else if (TREE_CODE (context) == CATEGORY_IMPLEMENTATION_TYPE
7338 || TREE_CODE (context) == CATEGORY_INTERFACE_TYPE)
7339 context = (CLASS_NAME (context)
7340 ? lookup_interface (CLASS_NAME (context))
7346 if (context == NULL_TREE)
7350 if (TREE_CODE (objc_implementation_context)
7351 == CLASS_IMPLEMENTATION_TYPE)
7352 warning (0, "incomplete implementation of class %qs",
7354 (CLASS_NAME (objc_implementation_context)));
7355 else if (TREE_CODE (objc_implementation_context)
7356 == CATEGORY_IMPLEMENTATION_TYPE)
7357 warning (0, "incomplete implementation of category %qs",
7359 (CLASS_SUPER_NAME (objc_implementation_context)));
7362 warning (0, "method definition for %<%c%s%> not found",
7363 mtype, IDENTIFIER_POINTER (METHOD_SEL_NAME (chain)));
7366 chain = TREE_CHAIN (chain); /* next method... */
7371 /* Check whether the current interface (accessible via
7372 'objc_implementation_context') actually implements protocol P, along
7373 with any protocols that P inherits. */
7376 check_protocol (tree p, const char *type, const char *name)
7378 if (TREE_CODE (p) == PROTOCOL_INTERFACE_TYPE)
7382 /* Ensure that all protocols have bodies! */
7385 f1 = check_methods (PROTOCOL_CLS_METHODS (p),
7386 CLASS_CLS_METHODS (objc_implementation_context),
7388 f2 = check_methods (PROTOCOL_NST_METHODS (p),
7389 CLASS_NST_METHODS (objc_implementation_context),
7394 f1 = check_methods_accessible (PROTOCOL_CLS_METHODS (p),
7395 objc_implementation_context,
7397 f2 = check_methods_accessible (PROTOCOL_NST_METHODS (p),
7398 objc_implementation_context,
7403 warning (0, "%s %qs does not fully implement the %qs protocol",
7404 type, name, IDENTIFIER_POINTER (PROTOCOL_NAME (p)));
7407 /* Check protocols recursively. */
7408 if (PROTOCOL_LIST (p))
7410 tree subs = PROTOCOL_LIST (p);
7412 lookup_interface (CLASS_SUPER_NAME (implementation_template));
7416 tree sub = TREE_VALUE (subs);
7418 /* If the superclass does not conform to the protocols
7419 inherited by P, then we must! */
7420 if (!super_class || !conforms_to_protocol (super_class, sub))
7421 check_protocol (sub, type, name);
7422 subs = TREE_CHAIN (subs);
7427 /* Check whether the current interface (accessible via
7428 'objc_implementation_context') actually implements the protocols listed
7432 check_protocols (tree proto_list, const char *type, const char *name)
7434 for ( ; proto_list; proto_list = TREE_CHAIN (proto_list))
7436 tree p = TREE_VALUE (proto_list);
7438 check_protocol (p, type, name);
7442 /* Make sure that the class CLASS_NAME is defined
7443 CODE says which kind of thing CLASS_NAME ought to be.
7444 It can be CLASS_INTERFACE_TYPE, CLASS_IMPLEMENTATION_TYPE,
7445 CATEGORY_INTERFACE_TYPE, or CATEGORY_IMPLEMENTATION_TYPE. */
7448 start_class (enum tree_code code, tree class_name, tree super_name,
7454 if (current_namespace != global_namespace) {
7455 error ("Objective-C declarations may only appear in global scope");
7457 #endif /* OBJCPLUS */
7459 if (objc_implementation_context)
7461 warning (0, "%<@end%> missing in implementation context");
7462 finish_class (objc_implementation_context);
7463 objc_ivar_chain = NULL_TREE;
7464 objc_implementation_context = NULL_TREE;
7467 klass = make_node (code);
7468 TYPE_LANG_SLOT_1 (klass) = make_tree_vec (CLASS_LANG_SLOT_ELTS);
7470 /* Check for existence of the super class, if one was specified. Note
7471 that we must have seen an @interface, not just a @class. If we
7472 are looking at a @compatibility_alias, traverse it first. */
7473 if ((code == CLASS_INTERFACE_TYPE || code == CLASS_IMPLEMENTATION_TYPE)
7476 tree super = objc_is_class_name (super_name);
7478 if (!super || !lookup_interface (super))
7480 error ("cannot find interface declaration for %qs, superclass of %qs",
7481 IDENTIFIER_POINTER (super ? super : super_name),
7482 IDENTIFIER_POINTER (class_name));
7483 super_name = NULL_TREE;
7489 CLASS_NAME (klass) = class_name;
7490 CLASS_SUPER_NAME (klass) = super_name;
7491 CLASS_CLS_METHODS (klass) = NULL_TREE;
7493 if (! objc_is_class_name (class_name)
7494 && (decl = lookup_name (class_name)))
7496 error ("%qs redeclared as different kind of symbol",
7497 IDENTIFIER_POINTER (class_name));
7498 error ("previous declaration of %q+D",
7502 if (code == CLASS_IMPLEMENTATION_TYPE)
7507 for (chain = implemented_classes; chain; chain = TREE_CHAIN (chain))
7508 if (TREE_VALUE (chain) == class_name)
7510 error ("reimplementation of class %qs",
7511 IDENTIFIER_POINTER (class_name));
7512 return error_mark_node;
7514 implemented_classes = tree_cons (NULL_TREE, class_name,
7515 implemented_classes);
7518 /* Reset for multiple classes per file. */
7521 objc_implementation_context = klass;
7523 /* Lookup the interface for this implementation. */
7525 if (!(implementation_template = lookup_interface (class_name)))
7527 warning (0, "cannot find interface declaration for %qs",
7528 IDENTIFIER_POINTER (class_name));
7529 add_class (implementation_template = objc_implementation_context,
7533 /* If a super class has been specified in the implementation,
7534 insure it conforms to the one specified in the interface. */
7537 && (super_name != CLASS_SUPER_NAME (implementation_template)))
7539 tree previous_name = CLASS_SUPER_NAME (implementation_template);
7540 const char *const name =
7541 previous_name ? IDENTIFIER_POINTER (previous_name) : "";
7542 error ("conflicting super class name %qs",
7543 IDENTIFIER_POINTER (super_name));
7544 error ("previous declaration of %qs", name);
7547 else if (! super_name)
7549 CLASS_SUPER_NAME (objc_implementation_context)
7550 = CLASS_SUPER_NAME (implementation_template);
7554 else if (code == CLASS_INTERFACE_TYPE)
7556 if (lookup_interface (class_name))
7558 error ("duplicate interface declaration for class %qs",
7560 warning (0, "duplicate interface declaration for class %qs",
7562 IDENTIFIER_POINTER (class_name));
7564 add_class (klass, class_name);
7567 CLASS_PROTOCOL_LIST (klass)
7568 = lookup_and_install_protocols (protocol_list);
7571 else if (code == CATEGORY_INTERFACE_TYPE)
7573 tree class_category_is_assoc_with;
7575 /* For a category, class_name is really the name of the class that
7576 the following set of methods will be associated with. We must
7577 find the interface so that can derive the objects template. */
7579 if (!(class_category_is_assoc_with = lookup_interface (class_name)))
7581 error ("cannot find interface declaration for %qs",
7582 IDENTIFIER_POINTER (class_name));
7583 exit (FATAL_EXIT_CODE);
7586 add_category (class_category_is_assoc_with, klass);
7589 CLASS_PROTOCOL_LIST (klass)
7590 = lookup_and_install_protocols (protocol_list);
7593 else if (code == CATEGORY_IMPLEMENTATION_TYPE)
7595 /* Reset for multiple classes per file. */
7598 objc_implementation_context = klass;
7600 /* For a category, class_name is really the name of the class that
7601 the following set of methods will be associated with. We must
7602 find the interface so that can derive the objects template. */
7604 if (!(implementation_template = lookup_interface (class_name)))
7606 error ("cannot find interface declaration for %qs",
7607 IDENTIFIER_POINTER (class_name));
7608 exit (FATAL_EXIT_CODE);
7615 continue_class (tree klass)
7617 if (TREE_CODE (klass) == CLASS_IMPLEMENTATION_TYPE
7618 || TREE_CODE (klass) == CATEGORY_IMPLEMENTATION_TYPE)
7620 struct imp_entry *imp_entry;
7622 /* Check consistency of the instance variables. */
7624 if (CLASS_RAW_IVARS (klass))
7625 check_ivars (implementation_template, klass);
7627 /* code generation */
7630 push_lang_context (lang_name_c);
7633 build_private_template (implementation_template);
7634 uprivate_record = CLASS_STATIC_TEMPLATE (implementation_template);
7635 objc_instance_type = build_pointer_type (uprivate_record);
7637 imp_entry = (struct imp_entry *) ggc_alloc (sizeof (struct imp_entry));
7639 imp_entry->next = imp_list;
7640 imp_entry->imp_context = klass;
7641 imp_entry->imp_template = implementation_template;
7643 synth_forward_declarations ();
7644 imp_entry->class_decl = UOBJC_CLASS_decl;
7645 imp_entry->meta_decl = UOBJC_METACLASS_decl;
7646 imp_entry->has_cxx_cdtors = 0;
7648 /* Append to front and increment count. */
7649 imp_list = imp_entry;
7650 if (TREE_CODE (klass) == CLASS_IMPLEMENTATION_TYPE)
7656 pop_lang_context ();
7657 #endif /* OBJCPLUS */
7659 return get_class_ivars (implementation_template, true);
7662 else if (TREE_CODE (klass) == CLASS_INTERFACE_TYPE)
7665 push_lang_context (lang_name_c);
7666 #endif /* OBJCPLUS */
7668 build_private_template (klass);
7671 pop_lang_context ();
7672 #endif /* OBJCPLUS */
7678 return error_mark_node;
7681 /* This is called once we see the "@end" in an interface/implementation. */
7684 finish_class (tree klass)
7686 if (TREE_CODE (klass) == CLASS_IMPLEMENTATION_TYPE)
7688 /* All code generation is done in finish_objc. */
7690 if (implementation_template != objc_implementation_context)
7692 /* Ensure that all method listed in the interface contain bodies. */
7693 check_methods (CLASS_CLS_METHODS (implementation_template),
7694 CLASS_CLS_METHODS (objc_implementation_context), '+');
7695 check_methods (CLASS_NST_METHODS (implementation_template),
7696 CLASS_NST_METHODS (objc_implementation_context), '-');
7698 if (CLASS_PROTOCOL_LIST (implementation_template))
7699 check_protocols (CLASS_PROTOCOL_LIST (implementation_template),
7701 IDENTIFIER_POINTER (CLASS_NAME (objc_implementation_context)));
7705 else if (TREE_CODE (klass) == CATEGORY_IMPLEMENTATION_TYPE)
7707 tree category = lookup_category (implementation_template, CLASS_SUPER_NAME (klass));
7711 /* Ensure all method listed in the interface contain bodies. */
7712 check_methods (CLASS_CLS_METHODS (category),
7713 CLASS_CLS_METHODS (objc_implementation_context), '+');
7714 check_methods (CLASS_NST_METHODS (category),
7715 CLASS_NST_METHODS (objc_implementation_context), '-');
7717 if (CLASS_PROTOCOL_LIST (category))
7718 check_protocols (CLASS_PROTOCOL_LIST (category),
7720 IDENTIFIER_POINTER (CLASS_SUPER_NAME (objc_implementation_context)));
7726 add_protocol (tree protocol)
7728 /* Put protocol on list in reverse order. */
7729 TREE_CHAIN (protocol) = protocol_chain;
7730 protocol_chain = protocol;
7731 return protocol_chain;
7735 lookup_protocol (tree ident)
7739 for (chain = protocol_chain; chain; chain = TREE_CHAIN (chain))
7740 if (ident == PROTOCOL_NAME (chain))
7746 /* This function forward declares the protocols named by NAMES. If
7747 they are already declared or defined, the function has no effect. */
7750 objc_declare_protocols (tree names)
7755 if (current_namespace != global_namespace) {
7756 error ("Objective-C declarations may only appear in global scope");
7758 #endif /* OBJCPLUS */
7760 for (list = names; list; list = TREE_CHAIN (list))
7762 tree name = TREE_VALUE (list);
7764 if (lookup_protocol (name) == NULL_TREE)
7766 tree protocol = make_node (PROTOCOL_INTERFACE_TYPE);
7768 TYPE_LANG_SLOT_1 (protocol)
7769 = make_tree_vec (PROTOCOL_LANG_SLOT_ELTS);
7770 PROTOCOL_NAME (protocol) = name;
7771 PROTOCOL_LIST (protocol) = NULL_TREE;
7772 add_protocol (protocol);
7773 PROTOCOL_DEFINED (protocol) = 0;
7774 PROTOCOL_FORWARD_DECL (protocol) = NULL_TREE;
7780 start_protocol (enum tree_code code, tree name, tree list)
7785 if (current_namespace != global_namespace) {
7786 error ("Objective-C declarations may only appear in global scope");
7788 #endif /* OBJCPLUS */
7790 protocol = lookup_protocol (name);
7794 protocol = make_node (code);
7795 TYPE_LANG_SLOT_1 (protocol) = make_tree_vec (PROTOCOL_LANG_SLOT_ELTS);
7797 PROTOCOL_NAME (protocol) = name;
7798 PROTOCOL_LIST (protocol) = lookup_and_install_protocols (list);
7799 add_protocol (protocol);
7800 PROTOCOL_DEFINED (protocol) = 1;
7801 PROTOCOL_FORWARD_DECL (protocol) = NULL_TREE;
7803 check_protocol_recursively (protocol, list);
7805 else if (! PROTOCOL_DEFINED (protocol))
7807 PROTOCOL_DEFINED (protocol) = 1;
7808 PROTOCOL_LIST (protocol) = lookup_and_install_protocols (list);
7810 check_protocol_recursively (protocol, list);
7814 warning (0, "duplicate declaration for protocol %qs",
7815 IDENTIFIER_POINTER (name));
7821 /* "Encode" a data type into a string, which grows in util_obstack.
7822 ??? What is the FORMAT? Someone please document this! */
7825 encode_type_qualifiers (tree declspecs)
7829 for (spec = declspecs; spec; spec = TREE_CHAIN (spec))
7831 if (ridpointers[(int) RID_IN] == TREE_VALUE (spec))
7832 obstack_1grow (&util_obstack, 'n');
7833 else if (ridpointers[(int) RID_INOUT] == TREE_VALUE (spec))
7834 obstack_1grow (&util_obstack, 'N');
7835 else if (ridpointers[(int) RID_OUT] == TREE_VALUE (spec))
7836 obstack_1grow (&util_obstack, 'o');
7837 else if (ridpointers[(int) RID_BYCOPY] == TREE_VALUE (spec))
7838 obstack_1grow (&util_obstack, 'O');
7839 else if (ridpointers[(int) RID_BYREF] == TREE_VALUE (spec))
7840 obstack_1grow (&util_obstack, 'R');
7841 else if (ridpointers[(int) RID_ONEWAY] == TREE_VALUE (spec))
7842 obstack_1grow (&util_obstack, 'V');
7846 /* Encode a pointer type. */
7849 encode_pointer (tree type, int curtype, int format)
7851 tree pointer_to = TREE_TYPE (type);
7853 if (TREE_CODE (pointer_to) == RECORD_TYPE)
7855 if (OBJC_TYPE_NAME (pointer_to)
7856 && TREE_CODE (OBJC_TYPE_NAME (pointer_to)) == IDENTIFIER_NODE)
7858 const char *name = IDENTIFIER_POINTER (OBJC_TYPE_NAME (pointer_to));
7860 if (strcmp (name, TAG_OBJECT) == 0) /* '@' */
7862 obstack_1grow (&util_obstack, '@');
7865 else if (TYPE_HAS_OBJC_INFO (pointer_to)
7866 && TYPE_OBJC_INTERFACE (pointer_to))
7868 if (generating_instance_variables)
7870 obstack_1grow (&util_obstack, '@');
7871 obstack_1grow (&util_obstack, '"');
7872 obstack_grow (&util_obstack, name, strlen (name));
7873 obstack_1grow (&util_obstack, '"');
7878 obstack_1grow (&util_obstack, '@');
7882 else if (strcmp (name, TAG_CLASS) == 0) /* '#' */
7884 obstack_1grow (&util_obstack, '#');
7887 else if (strcmp (name, TAG_SELECTOR) == 0) /* ':' */
7889 obstack_1grow (&util_obstack, ':');
7894 else if (TREE_CODE (pointer_to) == INTEGER_TYPE
7895 && TYPE_MODE (pointer_to) == QImode)
7897 tree pname = TREE_CODE (OBJC_TYPE_NAME (pointer_to)) == IDENTIFIER_NODE
7898 ? OBJC_TYPE_NAME (pointer_to)
7899 : DECL_NAME (OBJC_TYPE_NAME (pointer_to));
7901 if (!flag_next_runtime || strcmp (IDENTIFIER_POINTER (pname), "BOOL"))
7903 /* It appears that "r*" means "const char *" rather than
7905 if (TYPE_READONLY (pointer_to))
7906 obstack_1grow (&util_obstack, 'r');
7908 obstack_1grow (&util_obstack, '*');
7913 /* We have a type that does not get special treatment. */
7915 /* NeXT extension */
7916 obstack_1grow (&util_obstack, '^');
7917 encode_type (pointer_to, curtype, format);
7921 encode_array (tree type, int curtype, int format)
7923 tree an_int_cst = TYPE_SIZE (type);
7924 tree array_of = TREE_TYPE (type);
7927 /* An incomplete array is treated like a pointer. */
7928 if (an_int_cst == NULL)
7930 encode_pointer (type, curtype, format);
7934 if (TREE_INT_CST_LOW (TYPE_SIZE (array_of)) == 0)
7935 sprintf (buffer, "[" HOST_WIDE_INT_PRINT_DEC, (HOST_WIDE_INT)0);
7937 sprintf (buffer, "[" HOST_WIDE_INT_PRINT_DEC,
7938 TREE_INT_CST_LOW (an_int_cst)
7939 / TREE_INT_CST_LOW (TYPE_SIZE (array_of)));
7941 obstack_grow (&util_obstack, buffer, strlen (buffer));
7942 encode_type (array_of, curtype, format);
7943 obstack_1grow (&util_obstack, ']');
7948 encode_aggregate_fields (tree type, int pointed_to, int curtype, int format)
7950 tree field = TYPE_FIELDS (type);
7952 for (; field; field = TREE_CHAIN (field))
7955 /* C++ static members, and things that are not field at all,
7956 should not appear in the encoding. */
7957 if (TREE_CODE (field) != FIELD_DECL || TREE_STATIC (field))
7961 /* Recursively encode fields of embedded base classes. */
7962 if (DECL_ARTIFICIAL (field) && !DECL_NAME (field)
7963 && TREE_CODE (TREE_TYPE (field)) == RECORD_TYPE)
7965 encode_aggregate_fields (TREE_TYPE (field),
7966 pointed_to, curtype, format);
7970 if (generating_instance_variables && !pointed_to)
7972 tree fname = DECL_NAME (field);
7974 obstack_1grow (&util_obstack, '"');
7976 if (fname && TREE_CODE (fname) == IDENTIFIER_NODE)
7977 obstack_grow (&util_obstack,
7978 IDENTIFIER_POINTER (fname),
7979 strlen (IDENTIFIER_POINTER (fname)));
7981 obstack_1grow (&util_obstack, '"');
7984 encode_field_decl (field, curtype, format);
7989 encode_aggregate_within (tree type, int curtype, int format, int left,
7993 /* NB: aggregates that are pointed to have slightly different encoding
7994 rules in that you never encode the names of instance variables. */
7995 int ob_size = obstack_object_size (&util_obstack);
7996 char c1 = ob_size > 1 ? *(obstack_next_free (&util_obstack) - 2) : 0;
7997 char c0 = ob_size > 0 ? *(obstack_next_free (&util_obstack) - 1) : 0;
7998 int pointed_to = (c0 == '^' || (c1 == '^' && c0 == 'r'));
8000 = ((format == OBJC_ENCODE_INLINE_DEFS || generating_instance_variables)
8001 && (!pointed_to || ob_size - curtype == (c1 == 'r' ? 2 : 1)));
8003 /* Traverse struct aliases; it is important to get the
8004 original struct and its tag name (if any). */
8005 type = TYPE_MAIN_VARIANT (type);
8006 name = OBJC_TYPE_NAME (type);
8007 /* Open parenth/bracket. */
8008 obstack_1grow (&util_obstack, left);
8010 /* Encode the struct/union tag name, or '?' if a tag was
8011 not provided. Typedef aliases do not qualify. */
8012 if (name && TREE_CODE (name) == IDENTIFIER_NODE
8014 /* Did this struct have a tag? */
8015 && !TYPE_WAS_ANONYMOUS (type)
8018 obstack_grow (&util_obstack,
8019 IDENTIFIER_POINTER (name),
8020 strlen (IDENTIFIER_POINTER (name)));
8022 obstack_1grow (&util_obstack, '?');
8024 /* Encode the types (and possibly names) of the inner fields,
8026 if (inline_contents)
8028 obstack_1grow (&util_obstack, '=');
8029 encode_aggregate_fields (type, pointed_to, curtype, format);
8031 /* Close parenth/bracket. */
8032 obstack_1grow (&util_obstack, right);
8036 encode_aggregate (tree type, int curtype, int format)
8038 enum tree_code code = TREE_CODE (type);
8044 encode_aggregate_within (type, curtype, format, '{', '}');
8049 encode_aggregate_within (type, curtype, format, '(', ')');
8054 obstack_1grow (&util_obstack, 'i');
8062 /* Encode a bitfield NeXT-style (i.e., without a bit offset or the underlying
8066 encode_next_bitfield (int width)
8069 sprintf (buffer, "b%d", width);
8070 obstack_grow (&util_obstack, buffer, strlen (buffer));
8073 /* FORMAT will be OBJC_ENCODE_INLINE_DEFS or OBJC_ENCODE_DONT_INLINE_DEFS. */
8075 encode_type (tree type, int curtype, int format)
8077 enum tree_code code = TREE_CODE (type);
8080 if (type == error_mark_node)
8083 if (TYPE_READONLY (type))
8084 obstack_1grow (&util_obstack, 'r');
8086 if (code == INTEGER_TYPE)
8088 switch (GET_MODE_BITSIZE (TYPE_MODE (type)))
8090 case 8: c = TYPE_UNSIGNED (type) ? 'C' : 'c'; break;
8091 case 16: c = TYPE_UNSIGNED (type) ? 'S' : 's'; break;
8093 if (type == long_unsigned_type_node
8094 || type == long_integer_type_node)
8095 c = TYPE_UNSIGNED (type) ? 'L' : 'l';
8097 c = TYPE_UNSIGNED (type) ? 'I' : 'i';
8099 case 64: c = TYPE_UNSIGNED (type) ? 'Q' : 'q'; break;
8102 obstack_1grow (&util_obstack, c);
8105 else if (code == REAL_TYPE)
8107 /* Floating point types. */
8108 switch (GET_MODE_BITSIZE (TYPE_MODE (type)))
8110 case 32: c = 'f'; break;
8113 case 128: c = 'd'; break;
8116 obstack_1grow (&util_obstack, c);
8119 else if (code == VOID_TYPE)
8120 obstack_1grow (&util_obstack, 'v');
8122 else if (code == BOOLEAN_TYPE)
8123 obstack_1grow (&util_obstack, 'B');
8125 else if (code == ARRAY_TYPE)
8126 encode_array (type, curtype, format);
8128 else if (code == POINTER_TYPE)
8129 encode_pointer (type, curtype, format);
8131 else if (code == RECORD_TYPE || code == UNION_TYPE || code == ENUMERAL_TYPE)
8132 encode_aggregate (type, curtype, format);
8134 else if (code == FUNCTION_TYPE) /* '?' */
8135 obstack_1grow (&util_obstack, '?');
8137 else if (code == COMPLEX_TYPE)
8139 obstack_1grow (&util_obstack, 'j');
8140 encode_type (TREE_TYPE (type), curtype, format);
8145 encode_gnu_bitfield (int position, tree type, int size)
8147 enum tree_code code = TREE_CODE (type);
8149 char charType = '?';
8151 if (code == INTEGER_TYPE)
8153 if (integer_zerop (TYPE_MIN_VALUE (type)))
8155 /* Unsigned integer types. */
8157 if (TYPE_MODE (type) == QImode)
8159 else if (TYPE_MODE (type) == HImode)
8161 else if (TYPE_MODE (type) == SImode)
8163 if (type == long_unsigned_type_node)
8168 else if (TYPE_MODE (type) == DImode)
8173 /* Signed integer types. */
8175 if (TYPE_MODE (type) == QImode)
8177 else if (TYPE_MODE (type) == HImode)
8179 else if (TYPE_MODE (type) == SImode)
8181 if (type == long_integer_type_node)
8187 else if (TYPE_MODE (type) == DImode)
8191 else if (code == ENUMERAL_TYPE)
8196 sprintf (buffer, "b%d%c%d", position, charType, size);
8197 obstack_grow (&util_obstack, buffer, strlen (buffer));
8201 encode_field_decl (tree field_decl, int curtype, int format)
8206 /* C++ static members, and things that are not fields at all,
8207 should not appear in the encoding. */
8208 if (TREE_CODE (field_decl) != FIELD_DECL || TREE_STATIC (field_decl))
8212 type = TREE_TYPE (field_decl);
8214 /* Generate the bitfield typing information, if needed. Note the difference
8215 between GNU and NeXT runtimes. */
8216 if (DECL_BIT_FIELD_TYPE (field_decl))
8218 int size = tree_low_cst (DECL_SIZE (field_decl), 1);
8220 if (flag_next_runtime)
8221 encode_next_bitfield (size);
8223 encode_gnu_bitfield (int_bit_position (field_decl),
8224 DECL_BIT_FIELD_TYPE (field_decl), size);
8227 encode_type (TREE_TYPE (field_decl), curtype, format);
8230 static GTY(()) tree objc_parmlist = NULL_TREE;
8232 /* Append PARM to a list of formal parameters of a method, making a necessary
8233 array-to-pointer adjustment along the way. */
8236 objc_push_parm (tree parm)
8238 bool relayout_needed = false;
8240 if (TREE_TYPE (parm) == error_mark_node)
8242 objc_parmlist = chainon (objc_parmlist, parm);
8246 /* Decay arrays and functions into pointers. */
8247 if (TREE_CODE (TREE_TYPE (parm)) == ARRAY_TYPE)
8249 TREE_TYPE (parm) = build_pointer_type (TREE_TYPE (TREE_TYPE (parm)));
8250 relayout_needed = true;
8252 else if (TREE_CODE (TREE_TYPE (parm)) == FUNCTION_TYPE)
8254 TREE_TYPE (parm) = build_pointer_type (TREE_TYPE (parm));
8255 relayout_needed = true;
8258 if (relayout_needed)
8259 relayout_decl (parm);
8262 DECL_ARG_TYPE (parm)
8263 = lang_hooks.types.type_promotes_to (TREE_TYPE (parm));
8265 /* Record constancy and volatility. */
8266 c_apply_type_quals_to_decl
8267 ((TYPE_READONLY (TREE_TYPE (parm)) ? TYPE_QUAL_CONST : 0)
8268 | (TYPE_RESTRICT (TREE_TYPE (parm)) ? TYPE_QUAL_RESTRICT : 0)
8269 | (TYPE_VOLATILE (TREE_TYPE (parm)) ? TYPE_QUAL_VOLATILE : 0), parm);
8271 objc_parmlist = chainon (objc_parmlist, parm);
8274 /* Retrieve the formal parameter list constructed via preceding calls to
8275 objc_push_parm(). */
8279 objc_get_parm_info (int have_ellipsis ATTRIBUTE_UNUSED)
8281 static struct c_arg_info *
8282 objc_get_parm_info (int have_ellipsis)
8286 tree parm_info = objc_parmlist;
8287 objc_parmlist = NULL_TREE;
8291 tree parm_info = objc_parmlist;
8292 struct c_arg_info *arg_info;
8293 /* The C front-end requires an elaborate song and dance at
8296 declare_parm_level ();
8299 tree next = TREE_CHAIN (parm_info);
8301 TREE_CHAIN (parm_info) = NULL_TREE;
8302 parm_info = pushdecl (parm_info);
8303 finish_decl (parm_info, NULL_TREE, NULL_TREE);
8306 arg_info = get_parm_info (have_ellipsis);
8308 objc_parmlist = NULL_TREE;
8313 /* Synthesize the formal parameters 'id self' and 'SEL _cmd' needed for ObjC
8314 method definitions. In the case of instance methods, we can be more
8315 specific as to the type of 'self'. */
8318 synth_self_and_ucmd_args (void)
8322 if (objc_method_context
8323 && TREE_CODE (objc_method_context) == INSTANCE_METHOD_DECL)
8324 self_type = objc_instance_type;
8326 /* Really a `struct objc_class *'. However, we allow people to
8327 assign to self, which changes its type midstream. */
8328 self_type = objc_object_type;
8331 objc_push_parm (build_decl (PARM_DECL, self_id, self_type));
8334 objc_push_parm (build_decl (PARM_DECL, ucmd_id, objc_selector_type));
8337 /* Transform an Objective-C method definition into a static C function
8338 definition, synthesizing the first two arguments, "self" and "_cmd",
8342 start_method_def (tree method)
8348 struct c_arg_info *parm_info;
8350 int have_ellipsis = 0;
8352 /* If we are defining a "dealloc" method in a non-root class, we
8353 will need to check if a [super dealloc] is missing, and warn if
8355 if(CLASS_SUPER_NAME (objc_implementation_context)
8356 && !strcmp ("dealloc", IDENTIFIER_POINTER (METHOD_SEL_NAME (method))))
8357 should_call_super_dealloc = 1;
8359 should_call_super_dealloc = 0;
8361 /* Required to implement _msgSuper. */
8362 objc_method_context = method;
8363 UOBJC_SUPER_decl = NULL_TREE;
8365 /* Generate prototype declarations for arguments..."new-style". */
8366 synth_self_and_ucmd_args ();
8368 /* Generate argument declarations if a keyword_decl. */
8369 parmlist = METHOD_SEL_ARGS (method);
8372 tree type = TREE_VALUE (TREE_TYPE (parmlist)), parm;
8374 parm = build_decl (PARM_DECL, KEYWORD_ARG_NAME (parmlist), type);
8375 objc_push_parm (parm);
8376 parmlist = TREE_CHAIN (parmlist);
8379 if (METHOD_ADD_ARGS (method))
8383 for (akey = TREE_CHAIN (METHOD_ADD_ARGS (method));
8384 akey; akey = TREE_CHAIN (akey))
8386 objc_push_parm (TREE_VALUE (akey));
8389 if (METHOD_ADD_ARGS_ELLIPSIS_P (method))
8393 parm_info = objc_get_parm_info (have_ellipsis);
8395 really_start_method (objc_method_context, parm_info);
8399 warn_with_method (const char *message, int mtype, tree method)
8401 /* Add a readable method name to the warning. */
8402 warning (0, "%J%s %<%c%s%>", method,
8403 message, mtype, gen_method_decl (method));
8406 /* Return 1 if TYPE1 is equivalent to TYPE2
8407 for purposes of method overloading. */
8410 objc_types_are_equivalent (tree type1, tree type2)
8415 /* Strip away indirections. */
8416 while ((TREE_CODE (type1) == ARRAY_TYPE || TREE_CODE (type1) == POINTER_TYPE)
8417 && (TREE_CODE (type1) == TREE_CODE (type2)))
8418 type1 = TREE_TYPE (type1), type2 = TREE_TYPE (type2);
8419 if (TYPE_MAIN_VARIANT (type1) != TYPE_MAIN_VARIANT (type2))
8422 type1 = (TYPE_HAS_OBJC_INFO (type1)
8423 ? TYPE_OBJC_PROTOCOL_LIST (type1)
8425 type2 = (TYPE_HAS_OBJC_INFO (type2)
8426 ? TYPE_OBJC_PROTOCOL_LIST (type2)
8429 if (list_length (type1) == list_length (type2))
8431 for (; type2; type2 = TREE_CHAIN (type2))
8432 if (!lookup_protocol_in_reflist (type1, TREE_VALUE (type2)))
8439 /* Return 1 if TYPE1 has the same size and alignment as TYPE2. */
8442 objc_types_share_size_and_alignment (tree type1, tree type2)
8444 return (simple_cst_equal (TYPE_SIZE (type1), TYPE_SIZE (type2))
8445 && TYPE_ALIGN (type1) == TYPE_ALIGN (type2));
8448 /* Return 1 if PROTO1 is equivalent to PROTO2
8449 for purposes of method overloading. Ordinarily, the type signatures
8450 should match up exactly, unless STRICT is zero, in which case we
8451 shall allow differences in which the size and alignment of a type
8455 comp_proto_with_proto (tree proto1, tree proto2, int strict)
8459 /* The following test is needed in case there are hashing
8461 if (METHOD_SEL_NAME (proto1) != METHOD_SEL_NAME (proto2))
8464 /* Compare return types. */
8465 type1 = TREE_VALUE (TREE_TYPE (proto1));
8466 type2 = TREE_VALUE (TREE_TYPE (proto2));
8468 if (!objc_types_are_equivalent (type1, type2)
8469 && (strict || !objc_types_share_size_and_alignment (type1, type2)))
8472 /* Compare argument types. */
8473 for (type1 = get_arg_type_list (proto1, METHOD_REF, 0),
8474 type2 = get_arg_type_list (proto2, METHOD_REF, 0);
8476 type1 = TREE_CHAIN (type1), type2 = TREE_CHAIN (type2))
8478 if (!objc_types_are_equivalent (TREE_VALUE (type1), TREE_VALUE (type2))
8480 || !objc_types_share_size_and_alignment (TREE_VALUE (type1),
8481 TREE_VALUE (type2))))
8485 return (!type1 && !type2);
8488 /* Fold an OBJ_TYPE_REF expression for ObjC method dispatches, where
8489 this occurs. ObjC method dispatches are _not_ like C++ virtual
8490 member function dispatches, and we account for the difference here. */
8493 objc_fold_obj_type_ref (tree ref, tree known_type)
8495 objc_fold_obj_type_ref (tree ref ATTRIBUTE_UNUSED,
8496 tree known_type ATTRIBUTE_UNUSED)
8500 tree v = BINFO_VIRTUALS (TYPE_BINFO (known_type));
8502 /* If the receiver does not have virtual member functions, there
8503 is nothing we can (or need to) do here. */
8507 /* Let C++ handle C++ virtual functions. */
8508 return cp_fold_obj_type_ref (ref, known_type);
8510 /* For plain ObjC, we currently do not need to do anything. */
8516 objc_start_function (tree name, tree type, tree attrs,
8520 struct c_arg_info *params
8524 tree fndecl = build_decl (FUNCTION_DECL, name, type);
8527 DECL_ARGUMENTS (fndecl) = params;
8528 DECL_INITIAL (fndecl) = error_mark_node;
8529 DECL_EXTERNAL (fndecl) = 0;
8530 TREE_STATIC (fndecl) = 1;
8531 retrofit_lang_decl (fndecl);
8532 cplus_decl_attributes (&fndecl, attrs, 0);
8533 start_preparsed_function (fndecl, attrs, /*flags=*/SF_DEFAULT);
8535 struct c_label_context_se *nstack_se;
8536 struct c_label_context_vm *nstack_vm;
8537 nstack_se = XOBNEW (&parser_obstack, struct c_label_context_se);
8538 nstack_se->labels_def = NULL;
8539 nstack_se->labels_used = NULL;
8540 nstack_se->next = label_context_stack_se;
8541 label_context_stack_se = nstack_se;
8542 nstack_vm = XOBNEW (&parser_obstack, struct c_label_context_vm);
8543 nstack_vm->labels_def = NULL;
8544 nstack_vm->labels_used = NULL;
8545 nstack_vm->scope = 0;
8546 nstack_vm->next = label_context_stack_vm;
8547 label_context_stack_vm = nstack_vm;
8548 current_function_returns_value = 0; /* Assume, until we see it does. */
8549 current_function_returns_null = 0;
8551 decl_attributes (&fndecl, attrs, 0);
8552 announce_function (fndecl);
8553 DECL_INITIAL (fndecl) = error_mark_node;
8554 DECL_EXTERNAL (fndecl) = 0;
8555 TREE_STATIC (fndecl) = 1;
8556 current_function_decl = pushdecl (fndecl);
8558 declare_parm_level ();
8559 DECL_RESULT (current_function_decl)
8560 = build_decl (RESULT_DECL, NULL_TREE,
8561 TREE_TYPE (TREE_TYPE (current_function_decl)));
8562 DECL_ARTIFICIAL (DECL_RESULT (current_function_decl)) = 1;
8563 DECL_IGNORED_P (DECL_RESULT (current_function_decl)) = 1;
8564 start_fname_decls ();
8565 store_parm_decls_from (params);
8568 TREE_USED (current_function_decl) = 1;
8571 /* - Generate an identifier for the function. the format is "_n_cls",
8572 where 1 <= n <= nMethods, and cls is the name the implementation we
8574 - Install the return type from the method declaration.
8575 - If we have a prototype, check for type consistency. */
8578 really_start_method (tree method,
8582 struct c_arg_info *parmlist
8586 tree ret_type, meth_type;
8588 const char *sel_name, *class_name, *cat_name;
8591 /* Synth the storage class & assemble the return type. */
8592 ret_type = TREE_VALUE (TREE_TYPE (method));
8594 sel_name = IDENTIFIER_POINTER (METHOD_SEL_NAME (method));
8595 class_name = IDENTIFIER_POINTER (CLASS_NAME (objc_implementation_context));
8596 cat_name = ((TREE_CODE (objc_implementation_context)
8597 == CLASS_IMPLEMENTATION_TYPE)
8599 : IDENTIFIER_POINTER (CLASS_SUPER_NAME (objc_implementation_context)));
8602 /* Make sure this is big enough for any plausible method label. */
8603 buf = (char *) alloca (50 + strlen (sel_name) + strlen (class_name)
8604 + (cat_name ? strlen (cat_name) : 0));
8606 OBJC_GEN_METHOD_LABEL (buf, TREE_CODE (method) == INSTANCE_METHOD_DECL,
8607 class_name, cat_name, sel_name, method_slot);
8609 method_id = get_identifier (buf);
8612 /* Objective-C methods cannot be overloaded, so we don't need
8613 the type encoding appended. It looks bad anyway... */
8614 push_lang_context (lang_name_c);
8618 = build_function_type (ret_type,
8619 get_arg_type_list (method, METHOD_DEF, 0));
8620 objc_start_function (method_id, meth_type, NULL_TREE, parmlist);
8622 /* Set self_decl from the first argument. */
8623 self_decl = DECL_ARGUMENTS (current_function_decl);
8625 /* Suppress unused warnings. */
8626 TREE_USED (self_decl) = 1;
8627 TREE_USED (TREE_CHAIN (self_decl)) = 1;
8629 pop_lang_context ();
8632 METHOD_DEFINITION (method) = current_function_decl;
8634 /* Check consistency...start_function, pushdecl, duplicate_decls. */
8636 if (implementation_template != objc_implementation_context)
8639 = lookup_method_static (implementation_template,
8640 METHOD_SEL_NAME (method),
8641 ((TREE_CODE (method) == CLASS_METHOD_DECL)
8642 | OBJC_LOOKUP_NO_SUPER));
8646 if (!comp_proto_with_proto (method, proto, 1))
8648 char type = (TREE_CODE (method) == INSTANCE_METHOD_DECL ? '-' : '+');
8650 warn_with_method ("conflicting types for", type, method);
8651 warn_with_method ("previous declaration of", type, proto);
8656 /* We have a method @implementation even though we did not
8657 see a corresponding @interface declaration (which is allowed
8658 by Objective-C rules). Go ahead and place the method in
8659 the @interface anyway, so that message dispatch lookups
8661 tree interface = implementation_template;
8663 if (TREE_CODE (objc_implementation_context)
8664 == CATEGORY_IMPLEMENTATION_TYPE)
8665 interface = lookup_category
8667 CLASS_SUPER_NAME (objc_implementation_context));
8670 objc_add_method (interface, copy_node (method),
8671 TREE_CODE (method) == CLASS_METHOD_DECL);
8676 static void *UOBJC_SUPER_scope = 0;
8678 /* _n_Method (id self, SEL sel, ...)
8680 struct objc_super _S;
8681 _msgSuper ((_S.self = self, _S.class = _cls, &_S), ...);
8685 get_super_receiver (void)
8687 if (objc_method_context)
8689 tree super_expr, super_expr_list;
8691 if (!UOBJC_SUPER_decl)
8693 UOBJC_SUPER_decl = build_decl (VAR_DECL, get_identifier (TAG_SUPER),
8694 objc_super_template);
8695 /* This prevents `unused variable' warnings when compiling with -Wall. */
8696 TREE_USED (UOBJC_SUPER_decl) = 1;
8697 lang_hooks.decls.pushdecl (UOBJC_SUPER_decl);
8698 finish_decl (UOBJC_SUPER_decl, NULL_TREE, NULL_TREE);
8699 UOBJC_SUPER_scope = objc_get_current_scope ();
8702 /* Set receiver to self. */
8703 super_expr = objc_build_component_ref (UOBJC_SUPER_decl, self_id);
8704 super_expr = build_modify_expr (super_expr, NOP_EXPR, self_decl);
8705 super_expr_list = super_expr;
8707 /* Set class to begin searching. */
8708 super_expr = objc_build_component_ref (UOBJC_SUPER_decl,
8709 get_identifier ("super_class"));
8711 if (TREE_CODE (objc_implementation_context) == CLASS_IMPLEMENTATION_TYPE)
8713 /* [_cls, __cls]Super are "pre-built" in
8714 synth_forward_declarations. */
8716 super_expr = build_modify_expr (super_expr, NOP_EXPR,
8717 ((TREE_CODE (objc_method_context)
8718 == INSTANCE_METHOD_DECL)
8720 : uucls_super_ref));
8724 /* We have a category. */
8726 tree super_name = CLASS_SUPER_NAME (implementation_template);
8729 /* Barf if super used in a category of Object. */
8732 error ("no super class declared in interface for %qs",
8733 IDENTIFIER_POINTER (CLASS_NAME (implementation_template)));
8734 return error_mark_node;
8737 if (flag_next_runtime && !flag_zero_link)
8739 super_class = objc_get_class_reference (super_name);
8740 if (TREE_CODE (objc_method_context) == CLASS_METHOD_DECL)
8741 /* If we are in a class method, we must retrieve the
8742 _metaclass_ for the current class, pointed at by
8743 the class's "isa" pointer. The following assumes that
8744 "isa" is the first ivar in a class (which it must be). */
8746 = build_indirect_ref
8747 (build_c_cast (build_pointer_type (objc_class_type),
8748 super_class), "unary *", input_location);
8752 add_class_reference (super_name);
8753 super_class = (TREE_CODE (objc_method_context) == INSTANCE_METHOD_DECL
8754 ? objc_get_class_decl : objc_get_meta_class_decl);
8755 assemble_external (super_class);
8757 = build_function_call
8761 my_build_string_pointer
8762 (IDENTIFIER_LENGTH (super_name) + 1,
8763 IDENTIFIER_POINTER (super_name))));
8767 = build_modify_expr (super_expr, NOP_EXPR,
8768 build_c_cast (TREE_TYPE (super_expr),
8772 super_expr_list = build_compound_expr (super_expr_list, super_expr);
8774 super_expr = build_unary_op (ADDR_EXPR, UOBJC_SUPER_decl, 0);
8775 super_expr_list = build_compound_expr (super_expr_list, super_expr);
8777 return super_expr_list;
8781 error ("[super ...] must appear in a method context");
8782 return error_mark_node;
8786 /* When exiting a scope, sever links to a 'super' declaration (if any)
8787 therein contained. */
8790 objc_clear_super_receiver (void)
8792 if (objc_method_context
8793 && UOBJC_SUPER_scope == objc_get_current_scope ()) {
8794 UOBJC_SUPER_decl = 0;
8795 UOBJC_SUPER_scope = 0;
8800 objc_finish_method_definition (tree fndecl)
8802 /* We cannot validly inline ObjC methods, at least not without a language
8803 extension to declare that a method need not be dynamically
8804 dispatched, so suppress all thoughts of doing so. */
8805 DECL_UNINLINABLE (fndecl) = 1;
8808 /* The C++ front-end will have called finish_function() for us. */
8812 METHOD_ENCODING (objc_method_context)
8813 = encode_method_prototype (objc_method_context);
8815 /* Required to implement _msgSuper. This must be done AFTER finish_function,
8816 since the optimizer may find "may be used before set" errors. */
8817 objc_method_context = NULL_TREE;
8819 if (should_call_super_dealloc)
8820 warning (0, "method possibly missing a [super dealloc] call");
8825 lang_report_error_function (tree decl)
8827 if (objc_method_context)
8829 fprintf (stderr, "In method %qs\n",
8830 IDENTIFIER_POINTER (METHOD_SEL_NAME (objc_method_context)));
8839 /* Given a tree DECL node, produce a printable description of it in the given
8840 buffer, overwriting the buffer. */
8843 gen_declaration (tree decl)
8849 gen_type_name_0 (TREE_TYPE (decl));
8851 if (DECL_NAME (decl))
8853 if (!POINTER_TYPE_P (TREE_TYPE (decl)))
8854 strcat (errbuf, " ");
8856 strcat (errbuf, IDENTIFIER_POINTER (DECL_NAME (decl)));
8859 if (DECL_INITIAL (decl)
8860 && TREE_CODE (DECL_INITIAL (decl)) == INTEGER_CST)
8861 sprintf (errbuf + strlen (errbuf), ": " HOST_WIDE_INT_PRINT_DEC,
8862 TREE_INT_CST_LOW (DECL_INITIAL (decl)));
8868 /* Given a tree TYPE node, produce a printable description of it in the given
8869 buffer, overwriting the buffer. */
8872 gen_type_name_0 (tree type)
8874 tree orig = type, proto;
8876 if (TYPE_P (type) && TYPE_NAME (type))
8877 type = TYPE_NAME (type);
8878 else if (POINTER_TYPE_P (type) || TREE_CODE (type) == ARRAY_TYPE)
8880 tree inner = TREE_TYPE (type);
8882 while (TREE_CODE (inner) == ARRAY_TYPE)
8883 inner = TREE_TYPE (inner);
8885 gen_type_name_0 (inner);
8887 if (!POINTER_TYPE_P (inner))
8888 strcat (errbuf, " ");
8890 if (POINTER_TYPE_P (type))
8891 strcat (errbuf, "*");
8893 while (type != inner)
8895 strcat (errbuf, "[");
8897 if (TYPE_DOMAIN (type))
8901 sprintf (sz, HOST_WIDE_INT_PRINT_DEC,
8903 (TYPE_MAX_VALUE (TYPE_DOMAIN (type))) + 1));
8904 strcat (errbuf, sz);
8907 strcat (errbuf, "]");
8908 type = TREE_TYPE (type);
8914 if (TREE_CODE (type) == TYPE_DECL && DECL_NAME (type))
8915 type = DECL_NAME (type);
8917 strcat (errbuf, TREE_CODE (type) == IDENTIFIER_NODE
8918 ? IDENTIFIER_POINTER (type)
8921 /* For 'id' and 'Class', adopted protocols are stored in the pointee. */
8922 if (objc_is_id (orig))
8923 orig = TREE_TYPE (orig);
8925 proto = TYPE_HAS_OBJC_INFO (orig) ? TYPE_OBJC_PROTOCOL_LIST (orig) : NULL_TREE;
8929 strcat (errbuf, " <");
8933 IDENTIFIER_POINTER (PROTOCOL_NAME (TREE_VALUE (proto))));
8934 proto = TREE_CHAIN (proto);
8935 strcat (errbuf, proto ? ", " : ">");
8944 gen_type_name (tree type)
8948 return gen_type_name_0 (type);
8951 /* Given a method tree, put a printable description into the given
8952 buffer (overwriting) and return a pointer to the buffer. */
8955 gen_method_decl (tree method)
8959 strcpy (errbuf, "("); /* NB: Do _not_ call strcat() here. */
8960 gen_type_name_0 (TREE_VALUE (TREE_TYPE (method)));
8961 strcat (errbuf, ")");
8962 chain = METHOD_SEL_ARGS (method);
8966 /* We have a chain of keyword_decls. */
8969 if (KEYWORD_KEY_NAME (chain))
8970 strcat (errbuf, IDENTIFIER_POINTER (KEYWORD_KEY_NAME (chain)));
8972 strcat (errbuf, ":(");
8973 gen_type_name_0 (TREE_VALUE (TREE_TYPE (chain)));
8974 strcat (errbuf, ")");
8976 strcat (errbuf, IDENTIFIER_POINTER (KEYWORD_ARG_NAME (chain)));
8977 if ((chain = TREE_CHAIN (chain)))
8978 strcat (errbuf, " ");
8982 if (METHOD_ADD_ARGS (method))
8984 chain = TREE_CHAIN (METHOD_ADD_ARGS (method));
8986 /* Know we have a chain of parm_decls. */
8989 strcat (errbuf, ", ");
8990 gen_type_name_0 (TREE_TYPE (TREE_VALUE (chain)));
8991 chain = TREE_CHAIN (chain);
8994 if (METHOD_ADD_ARGS_ELLIPSIS_P (method))
8995 strcat (errbuf, ", ...");
9000 /* We have a unary selector. */
9001 strcat (errbuf, IDENTIFIER_POINTER (METHOD_SEL_NAME (method)));
9009 /* Dump an @interface declaration of the supplied class CHAIN to the
9010 supplied file FP. Used to implement the -gen-decls option (which
9011 prints out an @interface declaration of all classes compiled in
9012 this run); potentially useful for debugging the compiler too. */
9014 dump_interface (FILE *fp, tree chain)
9016 /* FIXME: A heap overflow here whenever a method (or ivar)
9017 declaration is so long that it doesn't fit in the buffer. The
9018 code and all the related functions should be rewritten to avoid
9019 using fixed size buffers. */
9020 const char *my_name = IDENTIFIER_POINTER (CLASS_NAME (chain));
9021 tree ivar_decls = CLASS_RAW_IVARS (chain);
9022 tree nst_methods = CLASS_NST_METHODS (chain);
9023 tree cls_methods = CLASS_CLS_METHODS (chain);
9025 fprintf (fp, "\n@interface %s", my_name);
9027 /* CLASS_SUPER_NAME is used to store the superclass name for
9028 classes, and the category name for categories. */
9029 if (CLASS_SUPER_NAME (chain))
9031 const char *name = IDENTIFIER_POINTER (CLASS_SUPER_NAME (chain));
9033 if (TREE_CODE (chain) == CATEGORY_IMPLEMENTATION_TYPE
9034 || TREE_CODE (chain) == CATEGORY_INTERFACE_TYPE)
9036 fprintf (fp, " (%s)\n", name);
9040 fprintf (fp, " : %s\n", name);
9046 /* FIXME - the following doesn't seem to work at the moment. */
9049 fprintf (fp, "{\n");
9052 fprintf (fp, "\t%s;\n", gen_declaration (ivar_decls));
9053 ivar_decls = TREE_CHAIN (ivar_decls);
9056 fprintf (fp, "}\n");
9061 fprintf (fp, "- %s;\n", gen_method_decl (nst_methods));
9062 nst_methods = TREE_CHAIN (nst_methods);
9067 fprintf (fp, "+ %s;\n", gen_method_decl (cls_methods));
9068 cls_methods = TREE_CHAIN (cls_methods);
9071 fprintf (fp, "@end\n");
9074 /* Demangle function for Objective-C */
9076 objc_demangle (const char *mangled)
9078 char *demangled, *cp;
9080 if (mangled[0] == '_' &&
9081 (mangled[1] == 'i' || mangled[1] == 'c') &&
9084 cp = demangled = XNEWVEC (char, strlen(mangled) + 2);
9085 if (mangled[1] == 'i')
9086 *cp++ = '-'; /* for instance method */
9088 *cp++ = '+'; /* for class method */
9089 *cp++ = '['; /* opening left brace */
9090 strcpy(cp, mangled+3); /* tack on the rest of the mangled name */
9091 while (*cp && *cp == '_')
9092 cp++; /* skip any initial underbars in class name */
9093 cp = strchr(cp, '_'); /* find first non-initial underbar */
9096 free(demangled); /* not mangled name */
9099 if (cp[1] == '_') /* easy case: no category name */
9101 *cp++ = ' '; /* replace two '_' with one ' ' */
9102 strcpy(cp, mangled + (cp - demangled) + 2);
9106 *cp++ = '('; /* less easy case: category name */
9107 cp = strchr(cp, '_');
9110 free(demangled); /* not mangled name */
9114 *cp++ = ' '; /* overwriting 1st char of method name... */
9115 strcpy(cp, mangled + (cp - demangled)); /* get it back */
9117 while (*cp && *cp == '_')
9118 cp++; /* skip any initial underbars in method name */
9121 *cp = ':'; /* replace remaining '_' with ':' */
9122 *cp++ = ']'; /* closing right brace */
9123 *cp++ = 0; /* string terminator */
9127 return mangled; /* not an objc mangled name */
9131 objc_printable_name (tree decl, int kind ATTRIBUTE_UNUSED)
9133 return objc_demangle (IDENTIFIER_POINTER (DECL_NAME (decl)));
9139 gcc_obstack_init (&util_obstack);
9140 util_firstobj = (char *) obstack_finish (&util_obstack);
9142 errbuf = XNEWVEC (char, 1024 * 10);
9144 synth_module_prologue ();
9150 struct imp_entry *impent;
9152 /* The internally generated initializers appear to have missing braces.
9153 Don't warn about this. */
9154 int save_warn_missing_braces = warn_missing_braces;
9155 warn_missing_braces = 0;
9157 /* A missing @end may not be detected by the parser. */
9158 if (objc_implementation_context)
9160 warning (0, "%<@end%> missing in implementation context");
9161 finish_class (objc_implementation_context);
9162 objc_ivar_chain = NULL_TREE;
9163 objc_implementation_context = NULL_TREE;
9166 /* Process the static instances here because initialization of objc_symtab
9168 if (objc_static_instances)
9169 generate_static_references ();
9171 if (imp_list || class_names_chain
9172 || meth_var_names_chain || meth_var_types_chain || sel_ref_chain)
9173 generate_objc_symtab_decl ();
9175 for (impent = imp_list; impent; impent = impent->next)
9177 objc_implementation_context = impent->imp_context;
9178 implementation_template = impent->imp_template;
9180 UOBJC_CLASS_decl = impent->class_decl;
9181 UOBJC_METACLASS_decl = impent->meta_decl;
9183 /* Dump the @interface of each class as we compile it, if the
9184 -gen-decls option is in use. TODO: Dump the classes in the
9185 order they were found, rather than in reverse order as we
9187 if (flag_gen_declaration)
9189 dump_interface (gen_declaration_file, objc_implementation_context);
9192 if (TREE_CODE (objc_implementation_context) == CLASS_IMPLEMENTATION_TYPE)
9194 /* all of the following reference the string pool... */
9195 generate_ivar_lists ();
9196 generate_dispatch_tables ();
9197 generate_shared_structures (impent->has_cxx_cdtors
9198 ? CLS_HAS_CXX_STRUCTORS
9203 generate_dispatch_tables ();
9204 generate_category (objc_implementation_context);
9208 /* If we are using an array of selectors, we must always
9209 finish up the array decl even if no selectors were used. */
9210 if (! flag_next_runtime || sel_ref_chain)
9211 build_selector_translation_table ();
9214 generate_protocols ();
9216 if ((flag_replace_objc_classes && imp_list) || flag_objc_gc)
9217 generate_objc_image_info ();
9219 /* Arrange for ObjC data structures to be initialized at run time. */
9220 if (objc_implementation_context || class_names_chain || objc_static_instances
9221 || meth_var_names_chain || meth_var_types_chain || sel_ref_chain)
9223 build_module_descriptor ();
9225 if (!flag_next_runtime)
9226 build_module_initializer_routine ();
9229 /* Dump the class references. This forces the appropriate classes
9230 to be linked into the executable image, preserving unix archive
9231 semantics. This can be removed when we move to a more dynamically
9232 linked environment. */
9234 for (chain = cls_ref_chain; chain; chain = TREE_CHAIN (chain))
9236 handle_class_ref (chain);
9237 if (TREE_PURPOSE (chain))
9238 generate_classref_translation_entry (chain);
9241 for (impent = imp_list; impent; impent = impent->next)
9242 handle_impent (impent);
9249 /* Run through the selector hash tables and print a warning for any
9250 selector which has multiple methods. */
9252 for (slot = 0; slot < SIZEHASHTABLE; slot++)
9254 for (hsh = cls_method_hash_list[slot]; hsh; hsh = hsh->next)
9255 check_duplicates (hsh, 0, 1);
9256 for (hsh = nst_method_hash_list[slot]; hsh; hsh = hsh->next)
9257 check_duplicates (hsh, 0, 1);
9261 warn_missing_braces = save_warn_missing_braces;
9264 /* Subroutines of finish_objc. */
9267 generate_classref_translation_entry (tree chain)
9269 tree expr, decl, type;
9271 decl = TREE_PURPOSE (chain);
9272 type = TREE_TYPE (decl);
9274 expr = add_objc_string (TREE_VALUE (chain), class_names);
9275 expr = convert (type, expr); /* cast! */
9277 /* The decl that is the one that we
9278 forward declared in build_class_reference. */
9279 finish_var_decl (decl, expr);
9284 handle_class_ref (tree chain)
9286 const char *name = IDENTIFIER_POINTER (TREE_VALUE (chain));
9287 char *string = (char *) alloca (strlen (name) + 30);
9291 sprintf (string, "%sobjc_class_name_%s",
9292 (flag_next_runtime ? "." : "__"), name);
9294 #ifdef ASM_DECLARE_UNRESOLVED_REFERENCE
9295 if (flag_next_runtime)
9297 ASM_DECLARE_UNRESOLVED_REFERENCE (asm_out_file, string);
9302 /* Make a decl for this name, so we can use its address in a tree. */
9303 decl = build_decl (VAR_DECL, get_identifier (string), char_type_node);
9304 DECL_EXTERNAL (decl) = 1;
9305 TREE_PUBLIC (decl) = 1;
9308 rest_of_decl_compilation (decl, 0, 0);
9310 /* Make a decl for the address. */
9311 sprintf (string, "%sobjc_class_ref_%s",
9312 (flag_next_runtime ? "." : "__"), name);
9313 exp = build1 (ADDR_EXPR, string_type_node, decl);
9314 decl = build_decl (VAR_DECL, get_identifier (string), string_type_node);
9315 DECL_INITIAL (decl) = exp;
9316 TREE_STATIC (decl) = 1;
9317 TREE_USED (decl) = 1;
9318 /* Force the output of the decl as this forces the reference of the class. */
9319 mark_decl_referenced (decl);
9322 rest_of_decl_compilation (decl, 0, 0);
9326 handle_impent (struct imp_entry *impent)
9330 objc_implementation_context = impent->imp_context;
9331 implementation_template = impent->imp_template;
9333 if (TREE_CODE (impent->imp_context) == CLASS_IMPLEMENTATION_TYPE)
9335 const char *const class_name =
9336 IDENTIFIER_POINTER (CLASS_NAME (impent->imp_context));
9338 string = (char *) alloca (strlen (class_name) + 30);
9340 sprintf (string, "%sobjc_class_name_%s",
9341 (flag_next_runtime ? "." : "__"), class_name);
9343 else if (TREE_CODE (impent->imp_context) == CATEGORY_IMPLEMENTATION_TYPE)
9345 const char *const class_name =
9346 IDENTIFIER_POINTER (CLASS_NAME (impent->imp_context));
9347 const char *const class_super_name =
9348 IDENTIFIER_POINTER (CLASS_SUPER_NAME (impent->imp_context));
9350 string = (char *) alloca (strlen (class_name)
9351 + strlen (class_super_name) + 30);
9353 /* Do the same for categories. Even though no references to
9354 these symbols are generated automatically by the compiler, it
9355 gives you a handle to pull them into an archive by hand. */
9356 sprintf (string, "*%sobjc_category_name_%s_%s",
9357 (flag_next_runtime ? "." : "__"), class_name, class_super_name);
9362 #ifdef ASM_DECLARE_CLASS_REFERENCE
9363 if (flag_next_runtime)
9365 ASM_DECLARE_CLASS_REFERENCE (asm_out_file, string);
9373 init = build_int_cst (c_common_type_for_size (BITS_PER_WORD, 1), 0);
9374 decl = build_decl (VAR_DECL, get_identifier (string), TREE_TYPE (init));
9375 TREE_PUBLIC (decl) = 1;
9376 TREE_READONLY (decl) = 1;
9377 TREE_USED (decl) = 1;
9378 TREE_CONSTANT (decl) = 1;
9379 DECL_CONTEXT (decl) = 0;
9380 DECL_ARTIFICIAL (decl) = 1;
9381 DECL_INITIAL (decl) = init;
9382 assemble_variable (decl, 1, 0, 0);
9386 /* The Fix-and-Continue functionality available in Mac OS X 10.3 and
9387 later requires that ObjC translation units participating in F&C be
9388 specially marked. The following routine accomplishes this. */
9390 /* static int _OBJC_IMAGE_INFO[2] = { 0, 1 }; */
9393 generate_objc_image_info (void)
9395 tree decl, initlist;
9397 = ((flag_replace_objc_classes && imp_list ? 1 : 0)
9398 | (flag_objc_gc ? 2 : 0));
9400 decl = start_var_decl (build_array_type
9402 build_index_type (build_int_cst (NULL_TREE, 2 - 1))),
9403 "_OBJC_IMAGE_INFO");
9405 initlist = build_tree_list (NULL_TREE, build_int_cst (NULL_TREE, 0));
9406 initlist = tree_cons (NULL_TREE, build_int_cst (NULL_TREE, flags), initlist);
9407 initlist = objc_build_constructor (TREE_TYPE (decl), nreverse (initlist));
9409 finish_var_decl (decl, initlist);
9412 /* Look up ID as an instance variable. OTHER contains the result of
9413 the C or C++ lookup, which we may want to use instead. */
9416 objc_lookup_ivar (tree other, tree id)
9420 /* If we are not inside of an ObjC method, ivar lookup makes no sense. */
9421 if (!objc_method_context)
9424 if (!strcmp (IDENTIFIER_POINTER (id), "super"))
9425 /* We have a message to super. */
9426 return get_super_receiver ();
9428 /* In a class method, look up an instance variable only as a last
9430 if (TREE_CODE (objc_method_context) == CLASS_METHOD_DECL
9431 && other && other != error_mark_node)
9434 /* Look up the ivar, but do not use it if it is not accessible. */
9435 ivar = is_ivar (objc_ivar_chain, id);
9437 if (!ivar || is_private (ivar))
9440 /* In an instance method, a local variable (or parameter) may hide the
9441 instance variable. */
9442 if (TREE_CODE (objc_method_context) == INSTANCE_METHOD_DECL
9443 && other && other != error_mark_node
9445 && CP_DECL_CONTEXT (other) != global_namespace)
9447 && !DECL_FILE_SCOPE_P (other))
9450 warning (0, "local declaration of %qs hides instance variable",
9451 IDENTIFIER_POINTER (id));
9456 /* At this point, we are either in an instance method with no obscuring
9457 local definitions, or in a class method with no alternate definitions
9459 return build_ivar_reference (id);
9462 /* Possibly rewrite a function CALL into an OBJ_TYPE_REF expression. This
9463 needs to be done if we are calling a function through a cast. */
9466 objc_rewrite_function_call (tree function, tree params)
9468 if (TREE_CODE (function) == NOP_EXPR
9469 && TREE_CODE (TREE_OPERAND (function, 0)) == ADDR_EXPR
9470 && TREE_CODE (TREE_OPERAND (TREE_OPERAND (function, 0), 0))
9473 function = build3 (OBJ_TYPE_REF, TREE_TYPE (function),
9474 TREE_OPERAND (function, 0),
9475 TREE_VALUE (params), size_zero_node);
9481 /* Look for the special case of OBJC_TYPE_REF with the address of
9482 a function in OBJ_TYPE_REF_EXPR (presumably objc_msgSend or one
9485 enum gimplify_status
9486 objc_gimplify_expr (tree *expr_p, gimple_seq *pre_p, gimple_seq *post_p)
9488 enum gimplify_status r0, r1;
9489 if (TREE_CODE (*expr_p) == OBJ_TYPE_REF
9490 && TREE_CODE (OBJ_TYPE_REF_EXPR (*expr_p)) == ADDR_EXPR
9491 && TREE_CODE (TREE_OPERAND (OBJ_TYPE_REF_EXPR (*expr_p), 0))
9494 /* Postincrements in OBJ_TYPE_REF_OBJECT don't affect the
9495 value of the OBJ_TYPE_REF, so force them to be emitted
9496 during subexpression evaluation rather than after the
9497 OBJ_TYPE_REF. This permits objc_msgSend calls in Objective
9498 C to use direct rather than indirect calls when the
9499 object expression has a postincrement. */
9500 r0 = gimplify_expr (&OBJ_TYPE_REF_OBJECT (*expr_p), pre_p, NULL,
9501 is_gimple_val, fb_rvalue);
9502 r1 = gimplify_expr (&OBJ_TYPE_REF_EXPR (*expr_p), pre_p, post_p,
9503 is_gimple_val, fb_rvalue);
9505 return MIN (r0, r1);
9509 return cp_gimplify_expr (expr_p, pre_p, post_p);
9511 return c_gimplify_expr (expr_p, pre_p, post_p);
9515 #include "gt-objc-objc-act.h"