diff options
Diffstat (limited to 'gcc/objc/objc-gnu-runtime-abi-01.c')
| -rw-r--r-- | gcc/objc/objc-gnu-runtime-abi-01.c | 2262 |
1 files changed, 0 insertions, 2262 deletions
diff --git a/gcc/objc/objc-gnu-runtime-abi-01.c b/gcc/objc/objc-gnu-runtime-abi-01.c deleted file mode 100644 index 8aa2044..0000000 --- a/gcc/objc/objc-gnu-runtime-abi-01.c +++ /dev/null @@ -1,2262 +0,0 @@ -/* GNU Runtime ABI version 8 - Copyright (C) 2011-2022 Free Software Foundation, Inc. - Contributed by Iain Sandoe (split from objc-act.c) - -This file is part of GCC. - -GCC is free software; you can redistribute it and/or modify -it under the terms of the GNU General Public License as published by -the Free Software Foundation; either version 3, or (at your option) -any later version. - -GCC is distributed in the hope that it will be useful, -but WITHOUT ANY WARRANTY; without even the implied warranty of -MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the -GNU General Public License for more details. - -You should have received a copy of the GNU General Public License -along with GCC; see the file COPYING3. If not see -<http://www.gnu.org/licenses/>. */ - -#include "config.h" -#include "system.h" -#include "coretypes.h" -#include "options.h" -#include "tree.h" -#include "stringpool.h" -#include "attribs.h" - -#ifdef OBJCPLUS -#include "cp/cp-tree.h" -#else -#include "c/c-tree.h" -#include "c/c-lang.h" -#endif - -#include "langhooks.h" -#include "c-family/c-objc.h" -#include "objc-act.h" - -/* When building Objective-C++, we are not linking against the C front-end - and so need to replicate the C tree-construction functions in some way. */ -#ifdef OBJCPLUS -#define OBJCP_REMAP_FUNCTIONS -#include "objcp-decl.h" -#endif /* OBJCPLUS */ - -#include "toplev.h" -#include "tree-iterator.h" - -#include "objc-runtime-hooks.h" -#include "objc-runtime-shared-support.h" -#include "objc-encoding.h" - -/* GNU runtime private definitions. */ -#define DEF_CONSTANT_STRING_CLASS_NAME "NXConstantString" - -#define TAG_GETCLASS "objc_get_class" -#define TAG_GETMETACLASS "objc_get_meta_class" - -#define TAG_MSGSEND "objc_msg_lookup" -#define TAG_MSGSENDSUPER "objc_msg_lookup_super" - -/* GNU-specific tags. */ - -#define TAG_EXECCLASS "__objc_exec_class" -#define TAG_GNUINIT "__objc_gnu_init" - -/* The version identifies which language generation and runtime - the module (file) was compiled for, and is recorded in the - module descriptor. */ -#define OBJC_VERSION 8 - -#define PROTOCOL_VERSION 2 - -/* This macro provides a method of removing ambiguity between runtimes - when LTO is in use on targets supporting multiple runtimes. - - For example, at present, any target that includes an implementation of - the NeXT runtime needs to place Objective-C meta-data into specific - named sections. This should _not_ be done for the GNU runtime, and the - following macro is used to attach Objective-C private attributes that may - be used to identify the runtime for which the meta-data are intended. */ - -#define OBJCMETA(DECL,VERS,KIND) \ - if (VERS) \ - DECL_ATTRIBUTES (DECL) = build_tree_list ((VERS), (KIND)); - -static void gnu_runtime_01_initialize (void); - -static void build_selector_template (void); - -static tree gnu_runtime_abi_01_super_superclassfield_id (void); - -static tree gnu_runtime_abi_01_class_decl (tree); -static tree gnu_runtime_abi_01_metaclass_decl (tree); -static tree gnu_runtime_abi_01_category_decl (tree); -static tree gnu_runtime_abi_01_protocol_decl (tree); -static tree gnu_runtime_abi_01_string_decl (tree, const char *, string_section); - -static tree gnu_runtime_abi_01_get_class_reference (tree); -static tree gnu_runtime_abi_01_build_typed_selector_reference (location_t, tree, - tree); -static tree gnu_runtime_abi_01_get_protocol_reference (location_t, tree); -static tree gnu_runtime_abi_01_build_ivar_ref (location_t, tree, tree); -static tree gnu_runtime_abi_01_get_class_super_ref (location_t, struct imp_entry *, bool); -static tree gnu_runtime_abi_01_get_category_super_ref (location_t, struct imp_entry *, bool); - -static tree gnu_runtime_abi_01_receiver_is_class_object (tree); -static void gnu_runtime_abi_01_get_arg_type_list_base (vec<tree, va_gc> **, - tree, int, int); -static tree gnu_runtime_abi_01_build_objc_method_call (location_t, tree, tree, - tree, tree, tree, int); - -static bool gnu_runtime_abi_01_setup_const_string_class_decl (void); -static tree gnu_runtime_abi_01_build_const_string_constructor (location_t, tree,int); - -static void objc_generate_v1_gnu_metadata (void); - -static tree objc_eh_runtime_type (tree type); -static tree objc_eh_personality (void); -static tree objc_build_exc_ptr (struct objc_try_context **); -static tree build_throw_stmt (location_t, tree, bool); -static tree begin_catch (struct objc_try_context **, tree, tree, tree, bool); -static void finish_catch (struct objc_try_context **, tree); -static tree finish_try_stmt (struct objc_try_context **); - -bool -objc_gnu_runtime_abi_01_init (objc_runtime_hooks *rthooks) -{ - /* GNU runtime does not need the compiler to change code in order to do GC. */ - if (flag_objc_gc) - { - warning_at (UNKNOWN_LOCATION, 0, - "%<-fobjc-gc%> is ignored for %<-fgnu-runtime%>"); - flag_objc_gc = 0; - } - - /* Although I guess we could, we don't currently support SJLJ exceptions for the - GNU runtime. */ - if (flag_objc_sjlj_exceptions) - { - inform (UNKNOWN_LOCATION, "%<-fobjc-sjlj-exceptions%> is ignored for %<-fgnu-runtime%>"); - flag_objc_sjlj_exceptions = 0; - } - - /* TODO: Complain if -fobjc-abi-version=N was used. */ - - /* TODO: Complain if -fobj-nilcheck was used. */ - - rthooks->initialize = gnu_runtime_01_initialize; - rthooks->default_constant_string_class_name = DEF_CONSTANT_STRING_CLASS_NAME; - rthooks->tag_getclass = TAG_GETCLASS; - rthooks->super_superclassfield_ident = gnu_runtime_abi_01_super_superclassfield_id; - - rthooks->class_decl = gnu_runtime_abi_01_class_decl; - rthooks->metaclass_decl = gnu_runtime_abi_01_metaclass_decl; - rthooks->category_decl = gnu_runtime_abi_01_category_decl; - rthooks->protocol_decl = gnu_runtime_abi_01_protocol_decl; - rthooks->string_decl = gnu_runtime_abi_01_string_decl; - - rthooks->get_class_reference = gnu_runtime_abi_01_get_class_reference; - rthooks->build_selector_reference = gnu_runtime_abi_01_build_typed_selector_reference; - rthooks->get_protocol_reference = gnu_runtime_abi_01_get_protocol_reference; - rthooks->build_ivar_reference = gnu_runtime_abi_01_build_ivar_ref; - rthooks->get_class_super_ref = gnu_runtime_abi_01_get_class_super_ref; - rthooks->get_category_super_ref = gnu_runtime_abi_01_get_category_super_ref; - - rthooks->receiver_is_class_object = gnu_runtime_abi_01_receiver_is_class_object; - rthooks->get_arg_type_list_base = gnu_runtime_abi_01_get_arg_type_list_base; - rthooks->build_objc_method_call = gnu_runtime_abi_01_build_objc_method_call; - - rthooks->setup_const_string_class_decl = - gnu_runtime_abi_01_setup_const_string_class_decl; - rthooks->build_const_string_constructor = - gnu_runtime_abi_01_build_const_string_constructor; - - rthooks->build_throw_stmt = build_throw_stmt; - rthooks->build_exc_ptr = objc_build_exc_ptr; - rthooks->begin_catch = begin_catch; - rthooks->finish_catch = finish_catch; - rthooks->finish_try_stmt = finish_try_stmt; - - rthooks->generate_metadata = objc_generate_v1_gnu_metadata; - return true; -} - -static void build_selector_table_decl (void); -static void build_class_template (void); -static void build_category_template (void); -static void build_protocol_template (void); - -static GTY(()) tree objc_meta; -static GTY(()) tree meta_base; - -static void gnu_runtime_01_initialize (void) -{ - tree type, ftype, IMP_type; - - /* We do not need to mark GNU ObjC metadata for different sections, - however, we do need to make sure that it is not mistaken for NeXT - metadata. */ - objc_meta = get_identifier ("OBJC1METG"); - meta_base = get_identifier ("NONE"); - - /* Declare type of selector-objects that represent an operation name. */ - /* `const struct objc_selector *' */ - type = xref_tag (RECORD_TYPE, get_identifier (TAG_SELECTOR)); - type = build_qualified_type (type, TYPE_QUAL_CONST); - objc_selector_type = build_pointer_type (type); - - /* SEL typedef. */ - type = lang_hooks.decls.pushdecl (build_decl (input_location, - TYPE_DECL, - objc_selector_name, - objc_selector_type)); - suppress_warning (type); - - /* typedef id (*IMP)(id, SEL, ...); */ - ftype = build_varargs_function_type_list (objc_object_type, - objc_object_type, - objc_selector_type, - NULL_TREE); - - IMP_type = build_pointer_type (ftype); - - build_class_template (); - build_super_template (); - build_protocol_template (); - build_category_template (); - - /* GNU runtime messenger entry points. */ - /* TREE_NOTHROW is cleared for the message-sending functions, - because the function that gets called can throw in Obj-C++, or - could itself call something that can throw even in Obj-C. */ - - /* IMP objc_msg_lookup (id, SEL); */ - type = build_function_type_list (IMP_type, - objc_object_type, - objc_selector_type, - NULL_TREE); - - umsg_decl = add_builtin_function (TAG_MSGSEND, - type, 0, NOT_BUILT_IN, - NULL, NULL_TREE); - TREE_NOTHROW (umsg_decl) = 0; - - /* IMP objc_msg_lookup_super (struct objc_super *, SEL); */ - type = build_function_type_list (IMP_type, - objc_super_type, - objc_selector_type, - NULL_TREE); - - umsg_super_decl = add_builtin_function (TAG_MSGSENDSUPER, - type, 0, NOT_BUILT_IN, - NULL, NULL_TREE); - TREE_NOTHROW (umsg_super_decl) = 0; - - /* The following GNU runtime entry point is called to initialize - each module: - - __objc_exec_class (void *); */ - type = build_function_type_list (void_type_node, - ptr_type_node, - NULL_TREE); - - execclass_decl = add_builtin_function (TAG_EXECCLASS, - type, 0, NOT_BUILT_IN, - NULL, NULL_TREE); - - type = build_function_type_list (objc_object_type, - const_string_type_node, - NULL_TREE); - - /* id objc_getClass (const char *); */ - objc_get_class_decl - = add_builtin_function (TAG_GETCLASS, type, 0, NOT_BUILT_IN, - NULL, NULL_TREE); - - /* id objc_getMetaClass (const char *); */ - objc_get_meta_class_decl = add_builtin_function (TAG_GETMETACLASS, type, - 0, NOT_BUILT_IN, NULL, - NULL_TREE); - - /* static SEL _OBJC_SELECTOR_TABLE[]; */ - build_selector_table_decl (); - - /* Stuff for properties. - The codegen relies on this being NULL for GNU. */ - objc_copyStruct_decl = NULL_TREE; - - /* This is the type of all of the following functions - bjc_getPropertyStruct() and objc_setPropertyStruct(). */ - type = build_function_type_list (void_type_node, - ptr_type_node, - const_ptr_type_node, - ptrdiff_type_node, - boolean_type_node, - boolean_type_node, - NULL_TREE); - - /* Declare the following function: - void - objc_getPropertyStruct (void *destination, const void *source, - ptrdiff_t size, BOOL is_atomic, BOOL has_strong); */ - objc_getPropertyStruct_decl = add_builtin_function ("objc_getPropertyStruct", - type, 0, NOT_BUILT_IN, - NULL, NULL_TREE); - TREE_NOTHROW (objc_getPropertyStruct_decl) = 0; - /* Declare the following function: - void - objc_setPropertyStruct (void *destination, const void *source, - ptrdiff_t size, BOOL is_atomic, BOOL has_strong); */ - objc_setPropertyStruct_decl = add_builtin_function ("objc_setPropertyStruct", - type, 0, NOT_BUILT_IN, - NULL, NULL_TREE); - TREE_NOTHROW (objc_setPropertyStruct_decl) = 0; - - using_eh_for_cleanups (); - lang_hooks.eh_runtime_type = objc_eh_runtime_type; - lang_hooks.eh_personality = objc_eh_personality; -} - -/* --- templates --- */ -/* struct _objc_selector { - SEL sel_id; - char *sel_type; - }; */ - -static void -build_selector_template (void) -{ - tree decls, *chain = NULL; - - objc_selector_template = objc_start_struct (get_identifier (UTAG_SELECTOR)); - - /* SEL sel_id; */ - decls = add_field_decl (objc_selector_type, "sel_id", &chain); - - /* char *sel_type; */ - add_field_decl (string_type_node, "sel_type", &chain); - - objc_finish_struct (objc_selector_template, decls); -} - -/* struct _objc_class { - struct _objc_class *isa; - struct _objc_class *super_class; - char *name; - long version; - long info; - long instance_size; - struct _objc_ivar_list *ivars; - struct _objc_method_list *methods; - struct sarray *dtable; - struct _objc_class *subclass_list; - struct _objc_class *sibling_class; - struct _objc_protocol_list *protocols; - void *gc_object_type; - }; */ - -static void -build_class_template (void) -{ - tree ptype, decls, *chain = NULL; - - objc_class_template = objc_start_struct (get_identifier (UTAG_CLASS)); - - /* struct _objc_class *isa; */ - decls = add_field_decl (build_pointer_type (objc_class_template), - "isa", &chain); - - /* struct _objc_class *super_class; */ - add_field_decl (build_pointer_type (objc_class_template), - "super_class", &chain); - - /* char *name; */ - add_field_decl (string_type_node, "name", &chain); - - /* long version; */ - add_field_decl (long_integer_type_node, "version", &chain); - - /* long info; */ - add_field_decl (long_integer_type_node, "info", &chain); - - /* long instance_size; */ - add_field_decl (long_integer_type_node, "instance_size", &chain); - - /* struct _objc_ivar_list *ivars; */ - add_field_decl (objc_ivar_list_ptr,"ivars", &chain); - - /* struct _objc_method_list *methods; */ - add_field_decl (objc_method_list_ptr, "methods", &chain); - - /* struct sarray *dtable; */ - ptype = build_pointer_type(xref_tag (RECORD_TYPE, - get_identifier ("sarray"))); - add_field_decl (ptype, "dtable", &chain); - - /* struct objc_class *subclass_list; */ - ptype = build_pointer_type (objc_class_template); - add_field_decl (ptype, "subclass_list", &chain); - - /* struct objc_class *sibling_class; */ - ptype = build_pointer_type (objc_class_template); - add_field_decl (ptype, "sibling_class", &chain); - - /* struct _objc_protocol **protocol_list; */ - ptype = build_pointer_type (build_pointer_type - (xref_tag (RECORD_TYPE, - get_identifier (UTAG_PROTOCOL)))); - add_field_decl (ptype, "protocol_list", &chain); - - /* void *gc_object_type; */ - add_field_decl (build_pointer_type (void_type_node), - "gc_object_type", &chain); - - objc_finish_struct (objc_class_template, decls); -} - -/* struct _objc_category { - char *category_name; - char *class_name; - struct _objc_method_list *instance_methods; - struct _objc_method_list *class_methods; - struct _objc_protocol_list *protocols; - }; */ - -static void -build_category_template (void) -{ - tree ptype, decls, *chain = NULL; - - objc_category_template = objc_start_struct (get_identifier (UTAG_CATEGORY)); - - /* char *category_name; */ - decls = add_field_decl (string_type_node, "category_name", &chain); - - /* char *class_name; */ - add_field_decl (string_type_node, "class_name", &chain); - - /* struct _objc_method_list *instance_methods; */ - add_field_decl (objc_method_list_ptr, "instance_methods", &chain); - - /* struct _objc_method_list *class_methods; */ - add_field_decl (objc_method_list_ptr, "class_methods", &chain); - - /* struct _objc_protocol **protocol_list; */ - ptype = build_pointer_type (build_pointer_type (objc_protocol_template)); - add_field_decl (ptype, "protocol_list", &chain); - - objc_finish_struct (objc_category_template, decls); -} - -/* struct _objc_protocol { - struct _objc_class *isa; - char *protocol_name; - struct _objc_protocol **protocol_list; - struct _objc__method_prototype_list *instance_methods; - struct _objc__method_prototype_list *class_methods; - }; */ - -static void -build_protocol_template (void) -{ - tree ptype, decls, *chain = NULL; - - objc_protocol_template = objc_start_struct (get_identifier (UTAG_PROTOCOL)); - - /* struct _objc_class *isa; */ - ptype = build_pointer_type (xref_tag (RECORD_TYPE, - get_identifier (UTAG_CLASS))); - decls = add_field_decl (ptype, "isa", &chain); - - /* char *protocol_name; */ - add_field_decl (string_type_node, "protocol_name", &chain); - - /* struct _objc_protocol **protocol_list; */ - ptype = build_pointer_type (build_pointer_type (objc_protocol_template)); - add_field_decl (ptype, "protocol_list", &chain); - - /* struct _objc__method_prototype_list *instance_methods; */ - add_field_decl (objc_method_proto_list_ptr, "instance_methods", &chain); - - /* struct _objc__method_prototype_list *class_methods; */ - add_field_decl (objc_method_proto_list_ptr, "class_methods", &chain); - - objc_finish_struct (objc_protocol_template, decls); -} - -/* --- names, decls + identifiers --- */ - -static void -build_selector_table_decl (void) -{ - tree temp; - - build_selector_template (); - temp = build_array_type (objc_selector_template, NULL_TREE); - - UOBJC_SELECTOR_TABLE_decl = start_var_decl (temp, "_OBJC_SELECTOR_TABLE"); - /* Squash `defined but not used' warning check_global_declaration. */ - TREE_USED (UOBJC_SELECTOR_TABLE_decl) = 1; - OBJCMETA (UOBJC_SELECTOR_TABLE_decl, objc_meta, meta_base); -} - - -static tree -gnu_runtime_abi_01_super_superclassfield_id (void) -{ - if (!super_superclassfield_id) - super_superclassfield_id = get_identifier ("super_class"); - return super_superclassfield_id; -} - - -static tree -gnu_runtime_abi_01_class_decl (tree klass) -{ - tree decl; - char buf[BUFSIZE]; - snprintf (buf, BUFSIZE, "_OBJC_Class_%s", - IDENTIFIER_POINTER (CLASS_NAME (klass))); - decl = start_var_decl (objc_class_template, buf); - OBJCMETA (decl, objc_meta, meta_base); - return decl; -} - -static tree -gnu_runtime_abi_01_metaclass_decl (tree klass) -{ - tree decl; - char buf[BUFSIZE]; - snprintf (buf, BUFSIZE, "_OBJC_MetaClass_%s", - IDENTIFIER_POINTER (CLASS_NAME (klass))); - decl = start_var_decl (objc_class_template, buf); - OBJCMETA (decl, objc_meta, meta_base); - return decl; -} - -static tree -gnu_runtime_abi_01_category_decl (tree klass) -{ - tree decl; - char buf[BUFSIZE]; - snprintf (buf, BUFSIZE, "_OBJC_Category_%s_on_%s", - IDENTIFIER_POINTER (CLASS_SUPER_NAME (klass)), - IDENTIFIER_POINTER (CLASS_NAME (klass))); - decl = start_var_decl (objc_category_template, buf); - OBJCMETA (decl, objc_meta, meta_base); - return decl; -} - -static tree -gnu_runtime_abi_01_protocol_decl (tree p) -{ - tree decl; - char buf[BUFSIZE]; - - /* static struct _objc_protocol _OBJC_Protocol_<mumble>; */ - snprintf (buf, BUFSIZE, "_OBJC_Protocol_%s", - IDENTIFIER_POINTER (PROTOCOL_NAME (p))); - decl = start_var_decl (objc_protocol_template, buf); - OBJCMETA (decl, objc_meta, meta_base); - return decl; -} - -static tree -gnu_runtime_abi_01_string_decl (tree type, const char *name, - string_section where ATTRIBUTE_UNUSED) -{ - tree decl = start_var_decl (type, name); - OBJCMETA (decl, objc_meta, meta_base); - return decl; -} - -/* --- entry --- */ - -static tree -gnu_runtime_abi_01_get_class_reference (tree ident) -{ - tree params; - - add_class_reference (ident); - - params = build_tree_list (NULL_TREE, my_build_string_pointer - (IDENTIFIER_LENGTH (ident) + 1, - IDENTIFIER_POINTER (ident))); - - return build_function_call (input_location, objc_get_class_decl, params); -} - -/* Used by build_function_type_for_method. Append the types for - receiver & _cmd at the start of a method argument list to ARGTYPES. - CONTEXT is either METHOD_DEF or METHOD_REF, saying whether we are - trying to define a method or call one. SUPERFLAG says this is for a - send to super. METH may be NULL, in the case that there is no - prototype. */ - -static void -gnu_runtime_abi_01_get_arg_type_list_base (vec<tree, va_gc> **argtypes, - tree meth, int context, - int superflag ATTRIBUTE_UNUSED) -{ - tree receiver_type; - - if (context == METHOD_DEF && TREE_CODE (meth) == INSTANCE_METHOD_DECL) - receiver_type = objc_instance_type; - else - receiver_type = objc_object_type; - - vec_safe_push (*argtypes, receiver_type); - /* Selector type - will eventually change to `int'. */ - vec_safe_push (*argtypes, objc_selector_type); -} - -/* Unused for GNU runtime. */ -static tree -gnu_runtime_abi_01_receiver_is_class_object (tree a ATTRIBUTE_UNUSED) -{ - return NULL_TREE; -} - -/* sel_ref_chain is a list whose "value" fields will be instances of - identifier_node that represent the selector. LOC is the location of - the @selector. */ - -static tree -gnu_runtime_abi_01_build_typed_selector_reference (location_t loc, tree ident, - tree prototype) -{ - tree *chain = &sel_ref_chain; - tree expr; - int index = 0; - - while (*chain) - { - /* When we do a lookup for @selector () we have no idea of the - prototype - so match the first we find. */ - if (TREE_VALUE (*chain) == ident - && (!prototype || TREE_PURPOSE (*chain) == prototype)) - goto return_at_index; - - index++; - chain = &TREE_CHAIN (*chain); - } - - *chain = tree_cons (prototype, ident, NULL_TREE); - - /* TODO: Use a vec and keep this in it to (a) avoid re-creating and - (b) provide better diagnostics for the first time an undefined - selector is used. */ - return_at_index: - expr = build_unary_op (loc, ADDR_EXPR, - build_array_ref (loc, UOBJC_SELECTOR_TABLE_decl, - build_int_cst (NULL_TREE, index)), - 1); - return convert (objc_selector_type, expr); -} - -/* Build a tree expression to send OBJECT the operation SELECTOR, - looking up the method on object LOOKUP_OBJECT (often same as OBJECT), - assuming the method has prototype METHOD_PROTOTYPE. - (That is an INSTANCE_METHOD_DECL or CLASS_METHOD_DECL.) - LOC is the location of the expression to build. - Use METHOD_PARAMS as list of args to pass to the method. - If SUPER_FLAG is nonzero, we look up the superclass's method. */ - -static tree -build_objc_method_call (location_t loc, int super_flag, tree method_prototype, - tree lookup_object, tree selector, - tree method_params) -{ - tree sender = (super_flag ? umsg_super_decl - : (flag_objc_direct_dispatch ? umsg_fast_decl - : umsg_decl)); - tree rcv_p = (super_flag ? objc_super_type : objc_object_type); - vec<tree, va_gc> *parms; - vec<tree, va_gc> *tv; - unsigned nparm = (method_params ? list_length (method_params) : 0); - - /* If a prototype for the method to be called exists, then cast - the sender's return type and arguments to match that of the method. - Otherwise, leave sender as is. */ - tree ret_type - = (method_prototype - ? TREE_VALUE (TREE_TYPE (method_prototype)) - : objc_object_type); - tree ftype - = build_function_type_for_method (ret_type, method_prototype, - METHOD_REF, super_flag); - tree sender_cast; - tree method, t; - - if (method_prototype && METHOD_TYPE_ATTRIBUTES (method_prototype)) - ftype = build_type_attribute_variant (ftype, - METHOD_TYPE_ATTRIBUTES - (method_prototype)); - - sender_cast = build_pointer_type (ftype); - - lookup_object = build_c_cast (loc, rcv_p, lookup_object); - - /* Use SAVE_EXPR to avoid evaluating the receiver twice. */ - lookup_object = save_expr (lookup_object); - - /* Param list + 2 slots for object and selector. */ - vec_alloc (parms, nparm + 2); - vec_alloc (tv, 2); - - /* First, call the lookup function to get a pointer to the method, - then cast the pointer, then call it with the method arguments. */ - tv->quick_push (lookup_object); - tv->quick_push (selector); - method = build_function_call_vec (loc, vNULL, sender, tv, NULL); - vec_free (tv); - - /* Pass the appropriate object to the method. */ - parms->quick_push ((super_flag ? self_decl : lookup_object)); - - /* Pass the selector to the method. */ - parms->quick_push (selector); - /* Now append the remainder of the parms. */ - if (nparm) - for (; method_params; method_params = TREE_CHAIN (method_params)) - parms->quick_push (TREE_VALUE (method_params)); - - /* Build an obj_type_ref, with the correct cast for the method call. */ - t = build3 (OBJ_TYPE_REF, sender_cast, method, lookup_object, - build_int_cst (TREE_TYPE (lookup_object), 0)); - t = build_function_call_vec (loc, vNULL, t, parms, NULL); - vec_free (parms); - return t; -} - -static tree -gnu_runtime_abi_01_build_objc_method_call (location_t loc, - tree method_prototype, - tree receiver, - tree rtype ATTRIBUTE_UNUSED, - tree sel_name, - tree method_params, - int super ATTRIBUTE_UNUSED) -{ - tree selector = - gnu_runtime_abi_01_build_typed_selector_reference (loc, - sel_name, - method_prototype); - - return build_objc_method_call (loc, super, method_prototype, receiver, - selector, method_params); -} - -static tree -gnu_runtime_abi_01_get_protocol_reference (location_t loc, tree p) -{ - tree expr, protocol_struct_type, *chain; - if (!PROTOCOL_FORWARD_DECL (p)) - PROTOCOL_FORWARD_DECL (p) = gnu_runtime_abi_01_protocol_decl (p); - - expr = build_unary_op (loc, ADDR_EXPR, PROTOCOL_FORWARD_DECL (p), 0); - - /* ??? Ideally we'd build the reference with objc_protocol_type directly, - if we have it, rather than converting it here. */ - expr = convert (objc_protocol_type, expr); - - /* The @protocol() expression is being compiled into a pointer to a - statically allocated instance of the Protocol class. To become - usable at runtime, the 'isa' pointer of the instance need to be - fixed up at runtime by the runtime library, to point to the - actual 'Protocol' class. */ - - /* For the GNU runtime, put the static Protocol instance in the list - of statically allocated instances, so that we make sure that its - 'isa' pointer is fixed up at runtime by the GNU runtime library - to point to the Protocol class (at runtime, when loading the - module, the GNU runtime library loops on the statically allocated - instances (as found in the defs field in objc_symtab) and fixups - all the 'isa' pointers of those objects). */ - - /* This type is a struct containing the fields of a Protocol - object. (Cfr. objc_protocol_type instead is the type of a pointer - to such a struct). */ - protocol_struct_type = xref_tag (RECORD_TYPE, - get_identifier (PROTOCOL_OBJECT_CLASS_NAME)); - - /* Look for the list of Protocol statically allocated instances - to fixup at runtime. Create a new list to hold Protocol - statically allocated instances, if the list is not found. At - present there is only another list, holding NSConstantString - static instances to be fixed up at runtime. */ - - for (chain = &objc_static_instances; - *chain && TREE_VALUE (*chain) != protocol_struct_type; - chain = &TREE_CHAIN (*chain)); - - if (!*chain) - { - *chain = tree_cons (NULL_TREE, protocol_struct_type, NULL_TREE); - add_objc_string (OBJC_TYPE_NAME (protocol_struct_type), - class_names); - } - - /* Add this statically allocated instance to the Protocol list. */ - TREE_PURPOSE (*chain) = tree_cons (NULL_TREE, - PROTOCOL_FORWARD_DECL (p), - TREE_PURPOSE (*chain)); - return expr; -} - -/* For ABI 8 an IVAR is just a fixed offset in the class struct. */ - -static tree -gnu_runtime_abi_01_build_ivar_ref (location_t loc ATTRIBUTE_UNUSED, - tree base, tree id) -{ - return objc_build_component_ref (base, id); -} - -/* We build super class references as we need them (but keep them once - built for the sake of efficiency). */ - -static tree -gnu_runtime_abi_01_get_class_super_ref (location_t loc ATTRIBUTE_UNUSED, - struct imp_entry *imp, bool inst_meth) -{ - if (inst_meth) - { - if (!ucls_super_ref) - ucls_super_ref = - objc_build_component_ref (imp->class_decl, - get_identifier ("super_class")); - return ucls_super_ref; - } - else - { - if (!uucls_super_ref) - uucls_super_ref = - objc_build_component_ref (imp->meta_decl, - get_identifier ("super_class")); - return uucls_super_ref; - } -} - -static tree -gnu_runtime_abi_01_get_category_super_ref (location_t loc ATTRIBUTE_UNUSED, - struct imp_entry *imp, bool inst_meth) -{ - tree super_name = CLASS_SUPER_NAME (imp->imp_template); - tree super_class; - - add_class_reference (super_name); - super_class = (inst_meth ? objc_get_class_decl : objc_get_meta_class_decl); - super_name = my_build_string_pointer (IDENTIFIER_LENGTH (super_name) + 1, - IDENTIFIER_POINTER (super_name)); - /* super_class = get_{meta_}class("CLASS_SUPER_NAME"); */ - return build_function_call (input_location, - super_class, - build_tree_list (NULL_TREE, super_name)); -} - -static bool -gnu_runtime_abi_01_setup_const_string_class_decl (void) -{ - /* Do nothing, and create no error. */ - return true; -} - -/* Declare a static instance of CLASS_DECL initialized by CONSTRUCTOR. */ - -static GTY(()) int num_static_inst; - -static tree -objc_add_static_instance (tree constructor, tree class_decl) -{ - tree *chain, decl; - char buf[BUFSIZE]; - - /* Find the list of static instances for the CLASS_DECL. Create one if - not found. */ - for (chain = &objc_static_instances; - *chain && TREE_VALUE (*chain) != class_decl; - chain = &TREE_CHAIN (*chain)); - if (!*chain) - { - *chain = tree_cons (NULL_TREE, class_decl, NULL_TREE); - add_objc_string (OBJC_TYPE_NAME (class_decl), class_names); - } - - snprintf (buf, BUFSIZE, "_OBJC_INSTANCE_%d", num_static_inst++); - decl = build_decl (input_location, - VAR_DECL, get_identifier (buf), class_decl); - TREE_STATIC (decl) = 1; - DECL_ARTIFICIAL (decl) = 1; - TREE_USED (decl) = 1; - DECL_INITIAL (decl) = constructor; - DECL_CONTEXT (decl) = NULL; - OBJCMETA (decl, objc_meta, meta_base); - - /* We may be writing something else just now. - Postpone till end of input. */ - DECL_DEFER_OUTPUT (decl) = 1; - lang_hooks.decls.pushdecl (decl); - rest_of_decl_compilation (decl, 1, 0); - - /* Add the DECL to the head of this CLASS' list. */ - TREE_PURPOSE (*chain) = tree_cons (NULL_TREE, decl, TREE_PURPOSE (*chain)); - - return decl; -} - -static tree -gnu_runtime_abi_01_build_const_string_constructor (location_t loc, tree string, - int length) -{ - tree constructor, fields; - vec<constructor_elt, va_gc> *v = NULL; - - /* GNU: (NXConstantString *) & ((__builtin_ObjCString) { NULL, string, length }) */ - fields = TYPE_FIELDS (internal_const_str_type); - CONSTRUCTOR_APPEND_ELT (v, fields, build_int_cst (NULL_TREE, 0)); - - fields = DECL_CHAIN (fields); - CONSTRUCTOR_APPEND_ELT (v, fields, build_unary_op (loc, - ADDR_EXPR, string, 1)); - - fields = DECL_CHAIN (fields); - CONSTRUCTOR_APPEND_ELT (v, fields, build_int_cst (NULL_TREE, length)); - constructor = objc_build_constructor (internal_const_str_type, v); - - constructor = objc_add_static_instance (constructor, constant_string_type); - return constructor; -} - -/* --- metadata - module initializer --- */ - -/* The GNU runtime requires us to provide a static initializer function - for each module: - - static void __objc_gnu_init (void) { - __objc_exec_class (&L_OBJC_MODULES); - } */ - - -static void -build_module_initializer_routine (void) -{ - tree body; - -#ifdef OBJCPLUS - push_lang_context (lang_name_c); /* extern "C" */ -#endif - - objc_push_parm (build_decl (input_location, - PARM_DECL, NULL_TREE, void_type_node)); -#ifdef OBJCPLUS - objc_start_function (get_identifier (TAG_GNUINIT), - build_function_type_list (void_type_node, NULL_TREE), - NULL_TREE, NULL_TREE); -#else - objc_start_function (get_identifier (TAG_GNUINIT), - build_function_type_list (void_type_node, NULL_TREE), - NULL_TREE, objc_get_parm_info (0, NULL_TREE)); -#endif - body = c_begin_compound_stmt (true); - add_stmt (build_function_call - (input_location, - execclass_decl, - build_tree_list - (NULL_TREE, - build_unary_op (input_location, ADDR_EXPR, - UOBJC_MODULES_decl, 0)))); - add_stmt (c_end_compound_stmt (input_location, body, true)); - - TREE_PUBLIC (current_function_decl) = 0; - -#ifndef OBJCPLUS - /* For Objective-C++, we will need to call __objc_gnu_init - from objc_generate_static_init_call() below. */ - DECL_STATIC_CONSTRUCTOR (current_function_decl) = 1; -#endif - - GNU_INIT_decl = current_function_decl; - finish_function (); - -#ifdef OBJCPLUS - pop_lang_context (); -#endif -} - -#ifdef OBJCPLUS -/* Return 1 if the __objc_gnu_init function has been synthesized and needs - to be called by the module initializer routine. */ - -int -objc_static_init_needed_p (void) -{ - return (GNU_INIT_decl != NULL_TREE); -} - -/* Generate a call to the __objc_gnu_init initializer function. */ - -tree -objc_generate_static_init_call (tree ctors ATTRIBUTE_UNUSED) -{ - add_stmt (build_stmt (input_location, EXPR_STMT, - build_function_call (input_location, - GNU_INIT_decl, NULL_TREE))); - - return ctors; -} -#endif /* OBJCPLUS */ - -/* --- Output GNU Meta-data --- */ - -static void -generate_classref_translation_entry (tree chain) -{ - tree expr, decl, type; - - decl = TREE_PURPOSE (chain); - type = TREE_TYPE (decl); - - expr = add_objc_string (TREE_VALUE (chain), class_names); - expr = convert (type, expr); /* cast! */ - - /* This is a class reference. It is re-written by the runtime, - but will be optimized away unless we force it. */ - DECL_PRESERVE_P (decl) = 1; - OBJCMETA (decl, objc_meta, meta_base); - finish_var_decl (decl, expr); - return; -} - - -static void -handle_impent (struct imp_entry *impent) -{ - char *string; - -/* objc_implementation_context = impent->imp_context; - implementation_template = impent->imp_template;*/ - - switch (TREE_CODE (impent->imp_context)) - { - case CLASS_IMPLEMENTATION_TYPE: - { - const char *const class_name = - IDENTIFIER_POINTER (CLASS_NAME (impent->imp_context)); - - string = (char *) alloca (strlen (class_name) + 30); - - sprintf (string, "__objc_class_name_%s", class_name); - break; - } - case CATEGORY_IMPLEMENTATION_TYPE: - { - const char *const class_name = - IDENTIFIER_POINTER (CLASS_NAME (impent->imp_context)); - const char *const class_super_name = - IDENTIFIER_POINTER (CLASS_SUPER_NAME (impent->imp_context)); - - string = (char *) alloca (strlen (class_name) - + strlen (class_super_name) + 30); - - /* Do the same for categories. Even though no references to - these symbols are generated automatically by the compiler, - it gives you a handle to pull them into an archive by - hand. */ - sprintf (string, "*__objc_category_name_%s_%s", class_name, class_super_name); - break; - } - default: - return; - } - - { - tree decl, init; - - init = integer_zero_node; - decl = build_decl (input_location, - VAR_DECL, get_identifier (string), TREE_TYPE (init)); - TREE_PUBLIC (decl) = 1; - TREE_READONLY (decl) = 1; - TREE_USED (decl) = 1; - TREE_CONSTANT (decl) = 1; - DECL_CONTEXT (decl) = NULL_TREE; - DECL_ARTIFICIAL (decl) = 1; - TREE_STATIC (decl) = 1; - DECL_INITIAL (decl) = error_mark_node; /* A real initializer is coming... */ - /* We must force the reference. */ - DECL_PRESERVE_P (decl) = 1; - - finish_var_decl(decl, init) ; - } -} - -tree -build_protocol_initializer (tree type, tree protocol_name, tree protocol_list, - tree inst_methods, tree class_methods) -{ - tree expr, ttyp; - location_t loc; - vec<constructor_elt, va_gc> *inits = NULL; - - /* TODO: pass the loc in or find it from args. */ - loc = input_location; - ttyp = build_pointer_type (xref_tag (RECORD_TYPE, - get_identifier (UTAG_CLASS))); - /* Filling the "isa" in with a version allows the runtime system to - detect this ... */ - expr = build_int_cst (ttyp, PROTOCOL_VERSION); - - CONSTRUCTOR_APPEND_ELT (inits, NULL_TREE, expr); - - CONSTRUCTOR_APPEND_ELT (inits, NULL_TREE, protocol_name); - CONSTRUCTOR_APPEND_ELT (inits, NULL_TREE, protocol_list); - - ttyp = objc_method_proto_list_ptr; - if (inst_methods) - expr = convert (ttyp, build_unary_op (loc, ADDR_EXPR, inst_methods, 0)); - else - expr = convert (ttyp, null_pointer_node); - CONSTRUCTOR_APPEND_ELT (inits, NULL_TREE, expr); - - if (class_methods) - expr = convert (ttyp, build_unary_op (loc, ADDR_EXPR, class_methods, 0)); - else - expr = convert (ttyp, null_pointer_node); - CONSTRUCTOR_APPEND_ELT (inits, NULL_TREE, expr); - - return objc_build_constructor (type, inits); -} - -static tree -generate_protocol_list (tree i_or_p, tree klass_ctxt) -{ - tree array_type, ptype, refs_decl, lproto, e, plist; - vec<constructor_elt, va_gc> *v = NULL; - char buf[BUFSIZE]; - int size = 0; - - switch (TREE_CODE (i_or_p)) - { - case CLASS_INTERFACE_TYPE: - case CATEGORY_INTERFACE_TYPE: - plist = CLASS_PROTOCOL_LIST (i_or_p); - break; - case PROTOCOL_INTERFACE_TYPE: - plist = PROTOCOL_LIST (i_or_p); - break; - default: - gcc_unreachable (); - } - - /* Compute size. */ - for (lproto = plist; lproto; lproto = TREE_CHAIN (lproto)) - if (TREE_CODE (TREE_VALUE (lproto)) == PROTOCOL_INTERFACE_TYPE - && PROTOCOL_FORWARD_DECL (TREE_VALUE (lproto))) - size++; - - /* Build initializer. */ - CONSTRUCTOR_APPEND_ELT (v, NULL_TREE, build_int_cst (NULL_TREE, 0)); - e = build_int_cst (build_pointer_type (objc_protocol_template), size); - CONSTRUCTOR_APPEND_ELT (v, NULL_TREE, e); - - for (lproto = plist; lproto; lproto = TREE_CHAIN (lproto)) - { - tree pval = TREE_VALUE (lproto); - - if (TREE_CODE (pval) == PROTOCOL_INTERFACE_TYPE - && PROTOCOL_FORWARD_DECL (pval)) - { - tree fwref = PROTOCOL_FORWARD_DECL (pval); - location_t loc = DECL_SOURCE_LOCATION (fwref) ; - e = build_unary_op (loc, ADDR_EXPR, fwref, 0); - CONSTRUCTOR_APPEND_ELT (v, NULL_TREE, e); - } - } - - /* static struct objc_protocol *refs[n]; */ - - switch (TREE_CODE (i_or_p)) - { - case PROTOCOL_INTERFACE_TYPE: - snprintf (buf, BUFSIZE, "_OBJC_ProtocolRefs_%s", - IDENTIFIER_POINTER (PROTOCOL_NAME (i_or_p))); - break; - case CLASS_INTERFACE_TYPE: - snprintf (buf, BUFSIZE, "_OBJC_ClassProtocols_%s", - IDENTIFIER_POINTER (CLASS_NAME (i_or_p))); - break; - case CATEGORY_INTERFACE_TYPE: - snprintf (buf, BUFSIZE, "_OBJC_CategoryProtocols_%s_%s", - IDENTIFIER_POINTER (CLASS_NAME (klass_ctxt)), - IDENTIFIER_POINTER (CLASS_SUPER_NAME (klass_ctxt))); - break; - default: - gcc_unreachable (); - } - - ptype = build_pointer_type (objc_protocol_template); - array_type = build_sized_array_type (ptype, size + 3); - refs_decl = start_var_decl (array_type, buf); - OBJCMETA (refs_decl, objc_meta, meta_base); - finish_var_decl (refs_decl, - objc_build_constructor (TREE_TYPE (refs_decl), v)); - - return refs_decl; -} - -static tree -generate_v1_meth_descriptor_table (tree chain, tree protocol, const char *prefix) -{ - tree method_list_template, initlist, decl; - int size; - vec<constructor_elt, va_gc> *v = NULL; - char buf[BUFSIZE]; - - if (!chain || !prefix) - return NULL_TREE; - - if (!objc_method_prototype_template) - objc_method_prototype_template = build_method_prototype_template (); - - size = list_length (chain); - method_list_template = - build_method_prototype_list_template (objc_method_prototype_template, - size); - snprintf (buf, BUFSIZE, "%s_%s", prefix, - IDENTIFIER_POINTER (PROTOCOL_NAME (protocol))); - - decl = start_var_decl (method_list_template, buf); - - CONSTRUCTOR_APPEND_ELT (v, NULL_TREE, build_int_cst (NULL_TREE, size)); - initlist = - build_descriptor_table_initializer (objc_method_prototype_template, - chain); - CONSTRUCTOR_APPEND_ELT (v, NULL_TREE, initlist); - OBJCMETA (decl, objc_meta, meta_base); - finish_var_decl (decl, objc_build_constructor (method_list_template, v)); - return decl; -} - -/* For each protocol which was referenced either from a @protocol() - expression, or because a class/category implements it (then a - pointer to the protocol is stored in the struct describing the - class/category), we create a statically allocated instance of the - Protocol class. The code is written in such a way as to generate - as few Protocol objects as possible; we generate a unique Protocol - instance for each protocol, and we don't generate a Protocol - instance if the protocol is never referenced (either from a - @protocol() or from a class/category implementation). These - statically allocated objects can be referred to via the static - (that is, private to this module) symbols _OBJC_PROTOCOL_n. - - The statically allocated Protocol objects that we generate here - need to be fixed up at runtime in order to be used: the 'isa' - pointer of the objects need to be set up to point to the 'Protocol' - class, as known at runtime. - - The GNU runtime fixes up all protocols before user code from the module - is executed; it requires pointers to those symbols - to be put in the objc_symtab (which is then passed as argument to - the function __objc_exec_class() which the compiler sets up to be - executed automatically when the module is loaded); setup of those - Protocol objects happen in two ways in the GNU runtime: all - Protocol objects referred to by a class or category implementation - are fixed up when the class/category is loaded; all Protocol - objects referred to by a @protocol() expression are added by the - compiler to the list of statically allocated instances to fixup - (the same list holding the statically allocated constant string - objects). Because, as explained above, the compiler generates as - few Protocol objects as possible, some Protocol object might end up - being referenced multiple times when compiled with the GNU runtime, - and end up being fixed up multiple times at runtime initialization. - But that doesn't hurt, it's just a little inefficient. */ - -static void -generate_protocols (void) -{ - tree p, encoding; - tree decl; - tree initlist, protocol_name_expr, refs_decl, refs_expr; - - /* If a protocol was directly referenced, pull in indirect references. */ - for (p = protocol_chain; p; p = TREE_CHAIN (p)) - if (PROTOCOL_FORWARD_DECL (p) && PROTOCOL_LIST (p)) - generate_protocol_references (PROTOCOL_LIST (p)); - - for (p = protocol_chain; p; p = TREE_CHAIN (p)) - { - tree nst_methods = PROTOCOL_NST_METHODS (p); - tree cls_methods = PROTOCOL_CLS_METHODS (p); - - /* If protocol wasn't referenced, don't generate any code. */ - decl = PROTOCOL_FORWARD_DECL (p); - - if (!decl) - continue; - - /* Make sure we link in the Protocol class. */ - add_class_reference (get_identifier (PROTOCOL_OBJECT_CLASS_NAME)); - - while (nst_methods) - { - if (! METHOD_ENCODING (nst_methods)) - { - encoding = encode_method_prototype (nst_methods); - METHOD_ENCODING (nst_methods) = encoding; - } - nst_methods = DECL_CHAIN (nst_methods); - } - - UOBJC_INSTANCE_METHODS_decl = - generate_v1_meth_descriptor_table (PROTOCOL_NST_METHODS (p), p, - "_OBJC_PROTOCOL_INSTANCE_METHODS"); - - while (cls_methods) - { - if (! METHOD_ENCODING (cls_methods)) - { - encoding = encode_method_prototype (cls_methods); - METHOD_ENCODING (cls_methods) = encoding; - } - - cls_methods = DECL_CHAIN (cls_methods); - } - - UOBJC_CLASS_METHODS_decl = - generate_v1_meth_descriptor_table (PROTOCOL_CLS_METHODS (p), p, - "_OBJC_PROTOCOL_CLASS_METHODS"); -/* generate_method_descriptors (p);*/ - - if (PROTOCOL_LIST (p)) - refs_decl = generate_protocol_list (p, NULL_TREE); - else - refs_decl = 0; - - /* static struct objc_protocol _OBJC_PROTOCOL_<mumble>; */ - protocol_name_expr = add_objc_string (PROTOCOL_NAME (p), class_names); - - if (refs_decl) - refs_expr = convert (build_pointer_type (build_pointer_type - (objc_protocol_template)), - build_unary_op (input_location, - ADDR_EXPR, refs_decl, 0)); - else - refs_expr = build_int_cst (NULL_TREE, 0); - - /* UOBJC_INSTANCE_METHODS_decl/UOBJC_CLASS_METHODS_decl are set - by generate_method_descriptors, which is called above. */ - initlist = build_protocol_initializer (TREE_TYPE (decl), - protocol_name_expr, refs_expr, - UOBJC_INSTANCE_METHODS_decl, - UOBJC_CLASS_METHODS_decl); - finish_var_decl (decl, initlist); - } -} - -static tree -generate_dispatch_table (tree chain, const char *name) -{ - tree decl, method_list_template, initlist; - vec<constructor_elt, va_gc> *v = NULL; - int size = list_length (chain); - - if (!objc_method_template) - objc_method_template = build_method_template (); - - method_list_template = build_method_list_template (objc_method_template, - size); - initlist = build_dispatch_table_initializer (objc_method_template, chain); - - decl = start_var_decl (method_list_template, name); - - CONSTRUCTOR_APPEND_ELT (v, NULL_TREE, integer_zero_node); - CONSTRUCTOR_APPEND_ELT (v, NULL_TREE, - build_int_cst (integer_type_node, size)); - CONSTRUCTOR_APPEND_ELT (v, NULL_TREE, initlist); - - OBJCMETA (decl, objc_meta, meta_base); - finish_var_decl (decl, - objc_build_constructor (TREE_TYPE (decl), v)); - - return decl; -} - -/* Init a category. */ -static tree -build_category_initializer (tree type, tree cat_name, tree class_name, - tree inst_methods, tree class_methods, - tree protocol_list) -{ - tree expr, ltyp; - location_t loc; - vec<constructor_elt, va_gc> *v = NULL; - - /* TODO: pass the loc in or find it from args. */ - /* TODO: pass the loc in or find it from args. */ - loc = UNKNOWN_LOCATION; - CONSTRUCTOR_APPEND_ELT (v, NULL_TREE, cat_name); - CONSTRUCTOR_APPEND_ELT (v, NULL_TREE, class_name); - - ltyp = objc_method_list_ptr; - if (inst_methods) - expr = convert (ltyp, build_unary_op (loc, ADDR_EXPR, inst_methods, 0)); - else - expr = convert (ltyp, null_pointer_node); - CONSTRUCTOR_APPEND_ELT (v, NULL_TREE, expr); - - if (class_methods) - expr = convert (ltyp, build_unary_op (loc, ADDR_EXPR, class_methods, 0)); - else - expr = convert (ltyp, null_pointer_node); - CONSTRUCTOR_APPEND_ELT (v, NULL_TREE, expr); - - /* protocol_list = */ - ltyp = build_pointer_type (build_pointer_type (objc_protocol_template)); - if (protocol_list) - expr = convert (ltyp, build_unary_op (loc, ADDR_EXPR, protocol_list, 0)); - else - expr = convert (ltyp, null_pointer_node); - CONSTRUCTOR_APPEND_ELT (v, NULL_TREE, expr); - - return objc_build_constructor (type, v); -} - -/* static struct objc_category _OBJC_CATEGORY_<name> = { ... }; */ - -static void -generate_category (struct imp_entry *impent) -{ - tree initlist, cat_name_expr, class_name_expr; - tree protocol_decl, category, cat_decl; - tree inst_methods = NULL_TREE, class_methods = NULL_TREE; - tree cat = impent->imp_context; - char buf[BUFSIZE]; - - cat_decl = impent->class_decl; - - add_class_reference (CLASS_NAME (cat)); - cat_name_expr = add_objc_string (CLASS_SUPER_NAME (cat), class_names); - - class_name_expr = add_objc_string (CLASS_NAME (cat), class_names); - - category = lookup_category (impent->imp_template, CLASS_SUPER_NAME (cat)); - - if (category && CLASS_PROTOCOL_LIST (category)) - { - generate_protocol_references (CLASS_PROTOCOL_LIST (category)); - protocol_decl = generate_protocol_list (category, cat); - } - else - protocol_decl = 0; - - if (CLASS_NST_METHODS (cat)) - { - snprintf (buf, BUFSIZE, "_OBJC_CategoryInstanceMethods_%s_%s", - IDENTIFIER_POINTER (CLASS_NAME (cat)), - IDENTIFIER_POINTER (CLASS_SUPER_NAME (cat))); - inst_methods = generate_dispatch_table (CLASS_NST_METHODS (cat), buf); - } - - if (CLASS_CLS_METHODS (cat)) - { - snprintf (buf, BUFSIZE, "_OBJC_CategoryClassMethods_%s_%s", - IDENTIFIER_POINTER (CLASS_NAME (cat)), - IDENTIFIER_POINTER (CLASS_SUPER_NAME (cat))); - class_methods = generate_dispatch_table (CLASS_CLS_METHODS (cat), buf); - } - - initlist = build_category_initializer (TREE_TYPE (cat_decl), - cat_name_expr, class_name_expr, - inst_methods, class_methods, - protocol_decl); - /* Finish and initialize the forward decl. */ - finish_var_decl (cat_decl, initlist); - impent->class_decl = cat_decl; -} - -/* struct _objc_class { - struct objc_class *isa; - struct objc_class *super_class; - char *name; - long version; - long info; - long instance_size; - struct objc_ivar_list *ivars; - struct objc_method_list *methods; - struct sarray *dtable; - struct objc_class *subclass_list; - struct objc_class *sibling_class; - struct objc_protocol_list *protocols; - void *gc_object_type; - }; */ - -static tree -build_shared_structure_initializer (tree type, tree isa, tree super, - tree name, tree size, int status, - tree dispatch_table, tree ivar_list, - tree protocol_list) -{ - tree expr, ltyp; - vec<constructor_elt, va_gc> *v = NULL; - - /* isa = */ - CONSTRUCTOR_APPEND_ELT (v, NULL_TREE, isa); - - /* super_class = */ - CONSTRUCTOR_APPEND_ELT (v, NULL_TREE, super); - - /* name = */ - CONSTRUCTOR_APPEND_ELT (v, NULL_TREE, default_conversion (name)); - - /* version = */ - CONSTRUCTOR_APPEND_ELT (v, NULL_TREE, - build_int_cst (long_integer_type_node, 0)); - - /* info = */ - CONSTRUCTOR_APPEND_ELT (v, NULL_TREE, - build_int_cst (long_integer_type_node, status)); - - /* instance_size = */ - CONSTRUCTOR_APPEND_ELT (v, NULL_TREE, - convert (long_integer_type_node, size)); - - /* objc_ivar_list = */ - if (!ivar_list) - CONSTRUCTOR_APPEND_ELT (v, NULL_TREE, - build_int_cst (objc_ivar_list_ptr, 0)); - else - { - expr = convert (objc_ivar_list_ptr, - build_unary_op (input_location, ADDR_EXPR, - ivar_list, 0)); - CONSTRUCTOR_APPEND_ELT (v, NULL_TREE, expr); - } - - /* objc_method_list = */ - if (!dispatch_table) - CONSTRUCTOR_APPEND_ELT (v, NULL_TREE, - convert (objc_method_list_ptr, null_pointer_node)); - else - { - expr = convert (objc_method_list_ptr, - build_unary_op (input_location, ADDR_EXPR, - dispatch_table, 0)); - CONSTRUCTOR_APPEND_ELT (v, NULL_TREE, expr); - } - - /* dtable = */ - CONSTRUCTOR_APPEND_ELT (v, NULL_TREE, build_int_cst (NULL_TREE, 0)); - - /* subclass_list = */ - CONSTRUCTOR_APPEND_ELT (v, NULL_TREE, build_int_cst (NULL_TREE, 0)); - - /* sibling_class = */ - CONSTRUCTOR_APPEND_ELT (v, NULL_TREE, build_int_cst (NULL_TREE, 0)); - - /* protocol_list = */ - ltyp = build_pointer_type (build_pointer_type (objc_protocol_template)); - if (! protocol_list) - CONSTRUCTOR_APPEND_ELT (v, NULL_TREE, build_int_cst (ltyp, 0)); - else - { - expr = convert (ltyp, - build_unary_op (input_location, ADDR_EXPR, - protocol_list, 0)); - CONSTRUCTOR_APPEND_ELT (v, NULL_TREE, expr); - } - - /* gc_object_type = NULL */ - CONSTRUCTOR_APPEND_ELT (v, NULL_TREE, build_int_cst (NULL_TREE, 0)); - - return objc_build_constructor (type, v); -} - - -static tree -generate_ivars_list (tree chain, const char *name) -{ - tree initlist, ivar_list_template, decl; - int size; - vec<constructor_elt, va_gc> *inits = NULL; - - if (!chain) - return NULL_TREE; - - if (!objc_ivar_template) - objc_ivar_template = build_ivar_template (); - - size = ivar_list_length (chain); - - generating_instance_variables = 1; - ivar_list_template = build_ivar_list_template (objc_ivar_template, size); - initlist = build_ivar_list_initializer (objc_ivar_template, chain); - generating_instance_variables = 0; - - decl = start_var_decl (ivar_list_template, name); - - CONSTRUCTOR_APPEND_ELT (inits, NULL_TREE, build_int_cst (NULL_TREE, size)); - CONSTRUCTOR_APPEND_ELT (inits, NULL_TREE, initlist); - - OBJCMETA (decl, objc_meta, meta_base); - finish_var_decl (decl, - objc_build_constructor (TREE_TYPE (decl), inits)); - - return decl; -} - -/* static struct objc_class _OBJC_METACLASS_Foo={ ... }; - static struct objc_class _OBJC_CLASS_Foo={ ... }; */ - -static void -generate_class_structures (struct imp_entry *impent) -{ - tree name_expr, super_expr, root_expr, class_decl, meta_decl; - tree my_root_id, my_super_id; - tree cast_type, initlist, protocol_decl; - tree inst_methods = NULL_TREE, class_methods = NULL_TREE; - tree chain, inst_ivars = NULL_TREE, class_ivars = NULL_TREE; - location_t loc; - char buf[BUFSIZE]; - int cls_flags = 0 ; - -/* objc_implementation_context = impent->imp_context; - implementation_template = impent->imp_template;*/ - class_decl = impent->class_decl; - meta_decl = impent->meta_decl; -/* UOBJC_CLASS_decl = impent->class_decl; - UOBJC_METACLASS_decl = impent->meta_decl;*/ - - loc = DECL_SOURCE_LOCATION (impent->class_decl); - - my_super_id = CLASS_SUPER_NAME (impent->imp_template); - if (my_super_id) - { - add_class_reference (my_super_id); - - /* Compute "my_root_id" - this is required for code generation. - the "isa" for all meta class structures points to the root of - the inheritance hierarchy (e.g. "__Object")... */ - my_root_id = my_super_id; - do - { - tree my_root_int = lookup_interface (my_root_id); - - if (my_root_int && CLASS_SUPER_NAME (my_root_int)) - my_root_id = CLASS_SUPER_NAME (my_root_int); - else - break; - } - while (1); - } - else - /* No super class. */ - my_root_id = CLASS_NAME (impent->imp_template); - - cast_type = build_pointer_type (objc_class_template); - name_expr = add_objc_string (CLASS_NAME (impent->imp_template), - class_names); - - /* Install class `isa' and `super' pointers at runtime. */ - if (my_super_id) - super_expr = add_objc_string (my_super_id, class_names); - else - super_expr = null_pointer_node; - - super_expr = build_c_cast (loc, cast_type, super_expr); - - root_expr = add_objc_string (my_root_id, class_names); - root_expr = build_c_cast (loc, cast_type, root_expr); - - if (CLASS_PROTOCOL_LIST (impent->imp_template)) - { - generate_protocol_references (CLASS_PROTOCOL_LIST (impent->imp_template)); - protocol_decl = generate_protocol_list (impent->imp_template, - impent->imp_context); - } - else - protocol_decl = NULL_TREE; - - if (CLASS_CLS_METHODS (impent->imp_context)) - { - snprintf (buf, BUFSIZE, "_OBJC_ClassMethods_%s", - IDENTIFIER_POINTER (CLASS_NAME (impent->imp_context))); - class_methods = generate_dispatch_table (CLASS_CLS_METHODS (impent->imp_context), - buf); - } - - if (CLASS_SUPER_NAME (impent->imp_template) == NULL_TREE - && (chain = TYPE_FIELDS (objc_class_template))) - { - snprintf (buf, BUFSIZE, "_OBJC_ClassIvars_%s", - IDENTIFIER_POINTER (CLASS_NAME (impent->imp_context))); - class_ivars = generate_ivars_list (chain, buf); - } - - /* static struct objc_class _OBJC_METACLASS_Foo = { ... }; */ - - initlist = - build_shared_structure_initializer - (TREE_TYPE (meta_decl), - root_expr, super_expr, name_expr, - convert (integer_type_node, - TYPE_SIZE_UNIT (objc_class_template)), - CLS_META, class_methods, class_ivars, - protocol_decl); - - finish_var_decl (meta_decl, initlist); - impent->meta_decl = meta_decl; - - /* static struct objc_class _OBJC_CLASS_Foo={ ... }; */ - if (CLASS_NST_METHODS (impent->imp_context)) - { - snprintf (buf, BUFSIZE, "_OBJC_InstanceMethods_%s", - IDENTIFIER_POINTER (CLASS_NAME (impent->imp_context))); - inst_methods = generate_dispatch_table (CLASS_NST_METHODS (impent->imp_context), - buf); - } - - if ((chain = CLASS_IVARS (impent->imp_template))) - { - snprintf (buf, BUFSIZE, "_OBJC_InstanceIvars_%s", - IDENTIFIER_POINTER (CLASS_NAME (impent->imp_context))); - inst_ivars = generate_ivars_list (chain, buf); - } - - initlist = - build_shared_structure_initializer - (TREE_TYPE (class_decl), - build_unary_op (loc, ADDR_EXPR, meta_decl, 0), - super_expr, name_expr, - convert (integer_type_node, - TYPE_SIZE_UNIT (CLASS_STATIC_TEMPLATE - (impent->imp_template))), - CLS_FACTORY | cls_flags, inst_methods, inst_ivars, - protocol_decl); - - finish_var_decl (class_decl, initlist); - impent->class_decl = class_decl; -} - -/* --- Output GNU Metadata --- */ - -/* TODO: Make this into an array of refs. */ -static void -handle_class_ref (tree chain) -{ - const char *name = IDENTIFIER_POINTER (TREE_VALUE (chain)); - char *string = (char *) alloca (strlen (name) + 30); - tree decl; - tree exp; - - sprintf (string, "__objc_class_name_%s", name); - - /* Make a decl for this name, so we can use its address in a tree. */ - decl = build_decl (input_location, - VAR_DECL, get_identifier (string), TREE_TYPE (integer_zero_node)); - DECL_EXTERNAL (decl) = 1; - TREE_PUBLIC (decl) = 1; - DECL_CONTEXT (decl) = NULL_TREE; - finish_var_decl (decl, 0); - - /* Make a decl for the address. */ - sprintf (string, "__objc_class_ref_%s", name); - exp = build1 (ADDR_EXPR, string_type_node, decl); - decl = build_decl (input_location, - VAR_DECL, get_identifier (string), string_type_node); - TREE_STATIC (decl) = 1; - TREE_USED (decl) = 1; - DECL_READ_P (decl) = 1; - DECL_ARTIFICIAL (decl) = 1; - DECL_INITIAL (decl) = error_mark_node; - - /* We must force the reference. */ - DECL_PRESERVE_P (decl) = 1; - - DECL_CONTEXT (decl) = NULL_TREE; - finish_var_decl (decl, exp); -} - -static tree -get_proto_encoding (tree proto) -{ - tree encoding; - if (proto) - { - if (! METHOD_ENCODING (proto)) - { - encoding = encode_method_prototype (proto); - METHOD_ENCODING (proto) = encoding; - } - else - encoding = METHOD_ENCODING (proto); - - return add_objc_string (encoding, meth_var_types); - } - else - return build_int_cst (NULL_TREE, 0); -} - -static void -build_gnu_selector_translation_table (void) -{ - tree chain, expr; - vec<constructor_elt, va_gc> *inits = NULL; - vec<constructor_elt, va_gc> *v ; - - /* Cause the selector table (previously forward-declared) - to be actually output. */ - - for (chain = sel_ref_chain; chain; chain = TREE_CHAIN (chain)) - { - tree encoding; - if (warn_selector) - { - /* TODO: improve on the location for the diagnostic. */ - location_t loc = input_location; - diagnose_missing_method (TREE_VALUE (chain), loc); - } - - v = NULL; - expr = build_selector (TREE_VALUE (chain)); - encoding = get_proto_encoding (TREE_PURPOSE (chain)); - CONSTRUCTOR_APPEND_ELT (v, NULL_TREE, expr); - CONSTRUCTOR_APPEND_ELT (v, NULL_TREE, encoding); - expr = objc_build_constructor (objc_selector_template, v); - - CONSTRUCTOR_APPEND_ELT (inits, NULL_TREE, expr); - } /* each element in the chain */ - - /* List terminator. */ - v = NULL; - CONSTRUCTOR_APPEND_ELT (v, NULL_TREE, integer_zero_node); - CONSTRUCTOR_APPEND_ELT (v, NULL_TREE, integer_zero_node); - expr = objc_build_constructor (objc_selector_template, v); - - CONSTRUCTOR_APPEND_ELT (inits, NULL_TREE, expr); - expr = objc_build_constructor (TREE_TYPE (UOBJC_SELECTOR_TABLE_decl), - inits); - finish_var_decl (UOBJC_SELECTOR_TABLE_decl, expr); -} - -/* Output references to all statically allocated objects. Return the DECL - for the array built. */ - -static void -generate_static_references (void) -{ - tree expr = NULL_TREE; - tree class_name, klass, decl; - tree cl_chain, in_chain, type - = build_array_type (build_pointer_type (void_type_node), NULL_TREE); - int num_inst, num_class; - char buf[BUFSIZE]; - vec<constructor_elt, va_gc> *decls = NULL; - - for (cl_chain = objc_static_instances, num_class = 0; - cl_chain; cl_chain = TREE_CHAIN (cl_chain), num_class++) - { - vec<constructor_elt, va_gc> *v = NULL; - - for (num_inst = 0, in_chain = TREE_PURPOSE (cl_chain); - in_chain; num_inst++, in_chain = TREE_CHAIN (in_chain)); - - snprintf (buf, BUFSIZE, "_OBJC_STATIC_INSTANCES_%d", num_class); - decl = start_var_decl (type, buf); - - /* Output {class_name, ...}. */ - klass = TREE_VALUE (cl_chain); - class_name = get_objc_string_decl (OBJC_TYPE_NAME (klass), class_names); - CONSTRUCTOR_APPEND_ELT (v, NULL_TREE, - build_unary_op (input_location, - ADDR_EXPR, class_name, 1)); - - /* Output {..., instance, ...}. */ - for (in_chain = TREE_PURPOSE (cl_chain); - in_chain; in_chain = TREE_CHAIN (in_chain)) - { - expr = build_unary_op (input_location, - ADDR_EXPR, TREE_VALUE (in_chain), 1); - CONSTRUCTOR_APPEND_ELT (v, NULL_TREE, expr); - } - - /* Output {..., NULL}. */ - CONSTRUCTOR_APPEND_ELT (v, NULL_TREE, build_int_cst (NULL_TREE, 0)); - - expr = objc_build_constructor (TREE_TYPE (decl), v); - OBJCMETA (decl, objc_meta, meta_base); - finish_var_decl (decl, expr); - CONSTRUCTOR_APPEND_ELT (decls, NULL_TREE, - build_unary_op (input_location, - ADDR_EXPR, decl, 1)); - } - - CONSTRUCTOR_APPEND_ELT (decls, NULL_TREE, build_int_cst (NULL_TREE, 0)); - expr = objc_build_constructor (type, decls); - static_instances_decl = start_var_decl (type, "_OBJC_STATIC_INSTANCES"); - OBJCMETA (static_instances_decl, objc_meta, meta_base); - finish_var_decl (static_instances_decl, expr); -} - -/* Create the initial value for the `defs' field of _objc_symtab. - This is a CONSTRUCTOR. */ - -static tree -init_def_list (tree type) -{ - tree expr; - struct imp_entry *impent; - location_t loc; - vec<constructor_elt, va_gc> *v = NULL; - - if (imp_count) - for (impent = imp_list; impent; impent = impent->next) - { - if (TREE_CODE (impent->imp_context) == CLASS_IMPLEMENTATION_TYPE) - { - loc = DECL_SOURCE_LOCATION (impent->class_decl); - expr = build_unary_op (loc, - ADDR_EXPR, impent->class_decl, 0); - CONSTRUCTOR_APPEND_ELT (v, NULL_TREE, expr); - } - } - - if (cat_count) - for (impent = imp_list; impent; impent = impent->next) - { - if (TREE_CODE (impent->imp_context) == CATEGORY_IMPLEMENTATION_TYPE) - { - loc = DECL_SOURCE_LOCATION (impent->class_decl); - expr = build_unary_op (loc, - ADDR_EXPR, impent->class_decl, 0); - CONSTRUCTOR_APPEND_ELT (v, NULL_TREE, expr); - } - } - - loc = UNKNOWN_LOCATION; - /* statics = { ..., _OBJC_STATIC_INSTANCES, ... } */ - if (static_instances_decl) - expr = build_unary_op (loc, ADDR_EXPR, static_instances_decl, 0); - else - expr = integer_zero_node; - CONSTRUCTOR_APPEND_ELT (v, NULL_TREE, expr); - - return objc_build_constructor (type, v); -} - -/* Take care of defining and initializing _OBJC_SYMBOLS. */ - -/* Predefine the following data type: - - struct _objc_symtab - { - long sel_ref_cnt; - SEL *refs; - short cls_def_cnt; - short cat_def_cnt; - void *defs[cls_def_cnt + cat_def_cnt]; - }; */ - -static void -build_objc_symtab_template (void) -{ - tree fields, array_type, *chain = NULL; - int index; - - objc_symtab_template = objc_start_struct (get_identifier (UTAG_SYMTAB)); - - /* long sel_ref_cnt; */ - fields = add_field_decl (long_integer_type_node, "sel_ref_cnt", &chain); - - /* SEL *refs; */ - add_field_decl (build_pointer_type (objc_selector_type), "refs", &chain); - - /* short cls_def_cnt; */ - add_field_decl (short_integer_type_node, "cls_def_cnt", &chain); - - /* short cat_def_cnt; */ - add_field_decl (short_integer_type_node, "cat_def_cnt", &chain); - - /* Note that padding will be added here on LP64. */ - - /* void *defs[imp_count + cat_count (+ 1)]; */ - /* NB: The index is one less than the size of the array. */ - index = imp_count + cat_count; - array_type = build_sized_array_type (ptr_type_node, index + 1); - add_field_decl (array_type, "defs", &chain); - - objc_finish_struct (objc_symtab_template, fields); -} -/* Construct the initial value for all of _objc_symtab. */ - -static tree -init_objc_symtab (tree type) -{ - tree field, expr, ltyp; - location_t loc; - vec<constructor_elt, va_gc> *v = NULL; - - loc = UNKNOWN_LOCATION; - - /* sel_ref_cnt = { ..., 5, ... } */ - - CONSTRUCTOR_APPEND_ELT (v, NULL_TREE, - build_int_cst (long_integer_type_node, 0)); - - /* refs = { ..., _OBJC_SELECTOR_TABLE, ... } */ - - ltyp = build_pointer_type (objc_selector_type); - if (sel_ref_chain) - expr = convert (ltyp, build_unary_op (loc, ADDR_EXPR, - UOBJC_SELECTOR_TABLE_decl, 1)); - else - expr = convert (ltyp, null_pointer_node); - CONSTRUCTOR_APPEND_ELT (v, NULL_TREE, expr); - - /* cls_def_cnt = { ..., 5, ... } */ - - CONSTRUCTOR_APPEND_ELT (v, NULL_TREE, - build_int_cst (short_integer_type_node, imp_count)); - - /* cat_def_cnt = { ..., 5, ... } */ - - CONSTRUCTOR_APPEND_ELT (v, NULL_TREE, - build_int_cst (short_integer_type_node, cat_count)); - - /* cls_def = { ..., { &Foo, &Bar, ...}, ... } */ - - field = TYPE_FIELDS (type); - field = DECL_CHAIN (DECL_CHAIN (DECL_CHAIN (DECL_CHAIN (field)))); - - CONSTRUCTOR_APPEND_ELT (v, NULL_TREE, init_def_list (TREE_TYPE (field))); - - return objc_build_constructor (type, v); -} - -/* Create the declaration of _OBJC_SYMBOLS, with type `struct _objc_symtab' - and initialized appropriately. */ - -static void -generate_objc_symtab_decl (void) -{ - build_objc_symtab_template (); - UOBJC_SYMBOLS_decl = start_var_decl (objc_symtab_template, "_OBJC_SYMBOLS"); - OBJCMETA (UOBJC_SYMBOLS_decl, objc_meta, meta_base); - finish_var_decl (UOBJC_SYMBOLS_decl, - init_objc_symtab (TREE_TYPE (UOBJC_SYMBOLS_decl))); -} - -static void -objc_generate_v1_gnu_metadata (void) -{ - struct imp_entry *impent; - tree chain; - - /* Process the static instances here because initialization of objc_symtab - depends on them. */ - if (objc_static_instances) - generate_static_references (); - - objc_implementation_context = - implementation_template = - UOBJC_CLASS_decl = - UOBJC_METACLASS_decl = NULL_TREE; - - for (impent = imp_list; impent; impent = impent->next) - { - /* If -gen-decls is present, Dump the @interface of each class. - TODO: Dump the classes in the order they were found, rather than in - reverse order as we are doing now. */ - if (flag_gen_declaration) - dump_interface (gen_declaration_file, impent->imp_context); - - /* all of the following reference the string pool... */ - if (TREE_CODE (impent->imp_context) == CLASS_IMPLEMENTATION_TYPE) - generate_class_structures (impent); - else - generate_category (impent); - } - - /* If we are using an array of selectors, we must always - finish up the array decl even if no selectors were used. */ - build_gnu_selector_translation_table (); - - if (protocol_chain) - generate_protocols (); - - /* Arrange for ObjC data structures to be initialized at run time. */ - /* FIXME: Have some more elegant way to determine if we need to - generate objc_symtab_decl or not, instead of checking these - global symbols. */ - if (imp_list || class_names_chain - || meth_var_names_chain || meth_var_types_chain || sel_ref_chain - || prop_names_attr_chain) - generate_objc_symtab_decl (); - - if (imp_list || class_names_chain || objc_static_instances - || meth_var_names_chain || meth_var_types_chain || sel_ref_chain) - { - /* Make sure that the meta-data are identified as being - GNU-runtime. */ - build_module_descriptor (OBJC_VERSION, - build_tree_list (objc_meta, meta_base)); - build_module_initializer_routine (); - } - - /* Dump the class references. This forces the appropriate classes - to be linked into the executable image, preserving unix archive - semantics. This can be removed when we move to a more dynamically - linked environment. */ - - for (chain = cls_ref_chain; chain; chain = TREE_CHAIN (chain)) - { - handle_class_ref (chain); - if (TREE_PURPOSE (chain)) - generate_classref_translation_entry (chain); - } - - for (impent = imp_list; impent; impent = impent->next) - handle_impent (impent); - - generate_strings (); -} - -/* --- exceptions --- */ - -static GTY(()) tree objc_eh_personality_decl; - -static tree -objc_eh_runtime_type (tree type) -{ - tree ident, eh_id, decl, str; - - if (type == error_mark_node - || errorcount || sorrycount) - { - /* Use 'ErrorMarkNode' as class name when error_mark_node is found - to prevent an ICE. Note that we know that the compiler will - terminate with an error and this 'ErrorMarkNode' class name will - never be actually used. */ - ident = get_identifier ("ErrorMarkNode"); - goto make_err_class; - } - - if (POINTER_TYPE_P (type) && objc_is_object_id (TREE_TYPE (type))) - /* We don't want to identify 'id' for GNU. Instead, build a 0 - entry in the exceptions table. */ - return null_pointer_node; - - if (!POINTER_TYPE_P (type) || !TYPED_OBJECT (TREE_TYPE (type))) - { -#ifdef OBJCPLUS - /* This routine is also called for c++ catch clauses; in which case, - we use the c++ typeinfo decl. */ - return build_eh_type_type (type); -#else - error ("non-objective-c type %qT cannot be caught", type); - ident = get_identifier ("ErrorMarkNode"); - goto make_err_class; -#endif - } - else - ident = OBJC_TYPE_NAME (TREE_TYPE (type)); - -make_err_class: - /* If this class was already referenced, then it will be output during - meta-data emission, so we don't need to do it here. */ - decl = get_objc_string_decl (ident, class_names); - eh_id = add_objc_string (ident, class_names); - if (!decl) - { - /* Not found ... so we need to build it - from the freshly-entered id. */ - decl = get_objc_string_decl (ident, class_names); - str = my_build_string (IDENTIFIER_LENGTH (ident) + 1, - IDENTIFIER_POINTER (ident)); - /* We have to finalize this var here, because this might be called after - all the other metadata strings have been emitted. */ - finish_var_decl (decl, str); - } - return eh_id; -} - -static tree -objc_eh_personality (void) -{ - if (!objc_eh_personality_decl) -#ifndef OBJCPLUS - objc_eh_personality_decl = build_personality_function ("gnu_objc"); -#else - objc_eh_personality_decl = build_personality_function ("gxx"); -#endif - return objc_eh_personality_decl; -} - -/* -- interfaces --- */ - -static tree -build_throw_stmt (location_t loc, tree throw_expr, bool rethrown ATTRIBUTE_UNUSED) -{ - tree t; - vec<tree, va_gc> *parms; - vec_alloc (parms, 1); - /* A throw is just a call to the runtime throw function with the - object as a parameter. */ - parms->quick_push (throw_expr); - t = build_function_call_vec (loc, vNULL, objc_exception_throw_decl, parms, - NULL); - vec_free (parms); - return add_stmt (t); -} - -/* Build __builtin_eh_pointer. */ - -static tree -objc_build_exc_ptr (struct objc_try_context **x ATTRIBUTE_UNUSED) -{ - tree t; - t = builtin_decl_explicit (BUILT_IN_EH_POINTER); - t = build_call_expr (t, 1, integer_zero_node); - return fold_convert (objc_object_type, t); -} - -static tree -begin_catch (struct objc_try_context **cur_try_context, tree type, - tree decl, tree compound, bool ellipsis ATTRIBUTE_UNUSED) -{ - tree t; - /* Record the data for the catch in the try context so that we can - finalize it later. */ - if (ellipsis) - t = build_stmt (input_location, CATCH_EXPR, NULL, compound); - else - t = build_stmt (input_location, CATCH_EXPR, type, compound); - (*cur_try_context)->current_catch = t; - - /* Initialize the decl from the EXC_PTR_EXPR we get from the runtime. */ - t = objc_build_exc_ptr (cur_try_context); - t = convert (TREE_TYPE (decl), t); - return build2 (MODIFY_EXPR, void_type_node, decl, t); -} - -static void -finish_catch (struct objc_try_context **cur_try_context, tree current_catch) -{ - append_to_statement_list (current_catch, &((*cur_try_context)->catch_list)); -} - -static tree -finish_try_stmt (struct objc_try_context **cur_try_context) -{ - struct objc_try_context *c = *cur_try_context; - tree stmt = c->try_body; - if (c->catch_list) - stmt = build_stmt (c->try_locus, TRY_CATCH_EXPR, stmt, c->catch_list); - if (c->finally_body) - stmt = build_stmt (c->try_locus, TRY_FINALLY_EXPR, stmt, c->finally_body); - return stmt; -} - -#include "gt-objc-objc-gnu-runtime-abi-01.h" |