diff options
Diffstat (limited to 'gcc-4.8.1/gcc/objc/objc-next-runtime-abi-01.c')
| -rw-r--r-- | gcc-4.8.1/gcc/objc/objc-next-runtime-abi-01.c | 2986 |
1 files changed, 0 insertions, 2986 deletions
diff --git a/gcc-4.8.1/gcc/objc/objc-next-runtime-abi-01.c b/gcc-4.8.1/gcc/objc/objc-next-runtime-abi-01.c deleted file mode 100644 index a9845cfc0..000000000 --- a/gcc-4.8.1/gcc/objc/objc-next-runtime-abi-01.c +++ /dev/null @@ -1,2986 +0,0 @@ -/* Next Runtime (ABI-0/1) private. - Copyright (C) 2011-2013 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/>. */ - -/* This implements the original NeXT ABI (0) used for m32 code and - indicated by module version 6. It also implements the small number - of additions made for properties and optional protocol methods as - ABI=1 (module version 7). */ - -#include "config.h" -#include "system.h" -#include "coretypes.h" -#include "tree.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 "ggc.h" -#include "target.h" -#include "c-family/c-target.h" -#include "tree-iterator.h" - -#include "objc-runtime-hooks.h" -#include "objc-runtime-shared-support.h" -#include "objc-encoding.h" - -/* NeXT ABI 0 and 1 private definitions. */ -#define DEF_CONSTANT_STRING_CLASS_NAME "NSConstantString" - -#define TAG_GETCLASS "objc_getClass" -#define TAG_GETMETACLASS "objc_getMetaClass" - -#define TAG_MSGSEND "objc_msgSend" -#define TAG_MSGSENDSUPER "objc_msgSendSuper" -#define TAG_MSGSEND_STRET "objc_msgSend_stret" -#define TAG_MSGSENDSUPER_STRET "objc_msgSendSuper_stret" - -/* NeXT-specific tags. */ - -#define TAG_MSGSEND_NONNIL "objc_msgSendNonNil" -#define TAG_MSGSEND_NONNIL_STRET "objc_msgSendNonNil_stret" -#define TAG_EXCEPTIONEXTRACT "objc_exception_extract" -#define TAG_EXCEPTIONTRYENTER "objc_exception_try_enter" -#define TAG_EXCEPTIONTRYEXIT "objc_exception_try_exit" -#define TAG_EXCEPTIONMATCH "objc_exception_match" -#define TAG_SETJMP "_setjmp" - -#define TAG_ASSIGNIVAR "objc_assign_ivar" -#define TAG_ASSIGNGLOBAL "objc_assign_global" -#define TAG_ASSIGNSTRONGCAST "objc_assign_strongCast" - -/* Branch entry points. All that matters here are the addresses; - functions with these names do not really exist in libobjc. */ - -#define TAG_MSGSEND_FAST "objc_msgSend_Fast" -#define TAG_ASSIGNIVAR_FAST "objc_assign_ivar_Fast" - -/* The version identifies which language generation and runtime the - module (file) was compiled for, and is recorded in the module - descriptor. */ -#define OBJC_VERSION (flag_objc_abi >= 1 ? 7 : 6) - -#define UTAG_CLASS_EXT "_objc_class_ext" -#define UTAG_PROPERTY_LIST "_prop_list_t" -#define UTAG_PROTOCOL_EXT "_objc_protocol_extension" - -#define CLS_HAS_CXX_STRUCTORS 0x2000L - -/* rt_trees identifiers - shared between NeXT implementations. These - allow the FE to tag meta-data in a manner that survives LTO and can - be used when the runtime requires that certain meta-data items - appear in particular named sections. */ - -#include "objc-next-metadata-tags.h" -extern GTY(()) tree objc_rt_trees[OCTI_RT_META_MAX]; - -static void next_runtime_01_initialize (void); - -static tree next_runtime_abi_01_super_superclassfield_id (void); - -static tree next_runtime_abi_01_class_decl (tree); -static tree next_runtime_abi_01_metaclass_decl (tree); -static tree next_runtime_abi_01_category_decl (tree); -static tree next_runtime_abi_01_protocol_decl (tree); -static tree next_runtime_abi_01_string_decl (tree, const char *, string_section); - -static tree next_runtime_abi_01_get_class_reference (tree); -static tree next_runtime_abi_01_build_selector_reference (location_t, tree, tree); -static tree next_runtime_abi_01_get_protocol_reference (location_t, tree); -static tree next_runtime_abi_01_build_ivar_ref (location_t, tree, tree); -static tree next_runtime_abi_01_get_class_super_ref (location_t, struct imp_entry *, bool); -static tree next_runtime_abi_01_get_category_super_ref (location_t, struct imp_entry *, bool); - -static tree next_runtime_abi_01_receiver_is_class_object (tree); -static void next_runtime_abi_01_get_arg_type_list_base (vec<tree, va_gc> **, - tree, int, int); -static tree next_runtime_abi_01_build_objc_method_call (location_t, tree, tree, - tree, tree, tree, int); -static bool next_runtime_abi_01_setup_const_string_class_decl (void); -static tree next_runtime_abi_01_build_const_string_constructor (location_t, tree, int); - -static void objc_generate_v1_next_metadata (void); - -static void build_next_objc_exception_stuff (void); -static tree objc_eh_runtime_type (tree type); -static tree objc_eh_personality (void); -static tree build_throw_stmt (location_t, tree, bool); -static tree objc_build_exc_ptr (struct objc_try_context **); -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_next_runtime_abi_01_init (objc_runtime_hooks *rthooks) -{ - if (flag_objc_exceptions - && !flag_objc_sjlj_exceptions) - { - warning_at (UNKNOWN_LOCATION, OPT_Wall, - "%<-fobjc-sjlj-exceptions%> is the only supported exceptions " - "system for %<-fnext-runtime%> with %<-fobjc-abi-version%> < 2"); - } - - rthooks->initialize = next_runtime_01_initialize; - rthooks->default_constant_string_class_name = DEF_CONSTANT_STRING_CLASS_NAME; - rthooks->tag_getclass = TAG_GETCLASS; - rthooks->super_superclassfield_ident = next_runtime_abi_01_super_superclassfield_id; - - rthooks->class_decl = next_runtime_abi_01_class_decl; - rthooks->metaclass_decl = next_runtime_abi_01_metaclass_decl; - rthooks->category_decl = next_runtime_abi_01_category_decl; - rthooks->protocol_decl = next_runtime_abi_01_protocol_decl; - rthooks->string_decl = next_runtime_abi_01_string_decl; - - rthooks->get_class_reference = next_runtime_abi_01_get_class_reference; - rthooks->build_selector_reference = next_runtime_abi_01_build_selector_reference; - rthooks->get_protocol_reference = next_runtime_abi_01_get_protocol_reference; - rthooks->build_ivar_reference = next_runtime_abi_01_build_ivar_ref; - rthooks->get_class_super_ref = next_runtime_abi_01_get_class_super_ref; - rthooks->get_category_super_ref = next_runtime_abi_01_get_category_super_ref; - - rthooks->receiver_is_class_object = next_runtime_abi_01_receiver_is_class_object; - rthooks->get_arg_type_list_base = next_runtime_abi_01_get_arg_type_list_base; - rthooks->build_objc_method_call = next_runtime_abi_01_build_objc_method_call; - - rthooks->setup_const_string_class_decl = - next_runtime_abi_01_setup_const_string_class_decl; - rthooks->build_const_string_constructor = - next_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_next_metadata; - return true; -} - -/* We need a way to convey what kind of meta-data are represented by a - given variable, since each type is expected (by the runtime) to be - found in a specific named section. The solution must be usable - with LTO. - - The scheme used for NeXT ABI 0/1 (partial matching of variable - names) is not satisfactory for LTO & ABI-2. We now tag ObjC - meta-data with identification attributes in the front end. The - back-end may choose to act on these as it requires. */ - -static void -next_runtime_abi_01_init_metadata_attributes (void) -{ - if (!objc_meta) - objc_meta = get_identifier ("OBJC1META"); - - if (!meta_base) - meta_base = get_identifier ("V1_BASE"); - - meta_class = get_identifier ("V1_CLAS"); - meta_metaclass = get_identifier ("V1_META"); - meta_category = get_identifier ("V1_CATG"); - meta_protocol = get_identifier ("V1_PROT"); - - meta_clac_vars = get_identifier ("V1_CLCV"); - meta_clai_vars = get_identifier ("V1_CLIV"); - - meta_clac_meth = get_identifier ("V1_CLCM"); - meta_clai_meth = get_identifier ("V1_CLIM"); - meta_catc_meth = get_identifier ("V1_CACM"); - meta_cati_meth = get_identifier ("V1_CAIM"); - meta_proto_cls_meth = get_identifier ("V1_PCLM"); - meta_proto_nst_meth = get_identifier ("V1_PNSM"); - - meta_clas_prot = get_identifier ("V1_CLPR"); - meta_catg_prot = get_identifier ("V1_CAPR"); - - meta_class_reference = get_identifier ("V1_CLRF"); - meta_proto_ref = get_identifier ("V1_PRFS"); - meta_sel_refs = get_identifier ("V1_SRFS"); - - meta_class_name = get_identifier ("V1_CLSN"); - meta_meth_name = get_identifier ("V1_METN"); - meta_meth_type = get_identifier ("V1_METT"); - meta_prop_name_attr = get_identifier ("V1_STRG"); - - meta_modules = get_identifier ("V1_MODU"); - meta_symtab = get_identifier ("V1_SYMT"); - meta_info = get_identifier ("V1_INFO"); - - meta_proplist = get_identifier ("V1_PLST"); - meta_protocol_extension = get_identifier ("V1_PEXT"); - meta_class_extension = get_identifier ("V1_CEXT"); - - meta_const_str = get_identifier ("V1_CSTR"); -} - -static void build_v1_class_template (void); -static void build_v1_category_template (void); -static void build_v1_protocol_template (void); - -static void next_runtime_01_initialize (void) -{ - tree type; - -#ifdef OBJCPLUS - /* For all NeXT objc ABIs -fobjc-call-cxx-cdtors is on by - default. */ - if (!global_options_set.x_flag_objc_call_cxx_cdtors) - global_options.x_flag_objc_call_cxx_cdtors = 1; -#endif - - /* Set up attributes to be attached to the meta-data so that they - will be placed in the correct sections. */ - next_runtime_abi_01_init_metadata_attributes (); - - if (flag_objc_abi >= 1) - objc_prop_list_ptr = build_pointer_type (xref_tag (RECORD_TYPE, - get_identifier ("_prop_list_t"))); - - /* Declare type of selector-objects that represent an operation - name. */ - /* `struct objc_selector *' */ - objc_selector_type = build_pointer_type (xref_tag (RECORD_TYPE, - get_identifier (TAG_SELECTOR))); - - build_v1_class_template (); - build_super_template (); - build_v1_protocol_template (); - build_v1_category_template (); - - /* NB: In order to call one of the ..._stret (struct-returning) - functions, the function *MUST* first be cast to a signature that - corresponds to the actual ObjC method being invoked. This is - what is done by the build_objc_method_call() routine below. */ - - /* id objc_msgSend (id, SEL, ...); */ - /* id objc_msgSendNonNil (id, SEL, ...); */ - /* id objc_msgSend_stret (id, SEL, ...); */ - /* id objc_msgSendNonNil_stret (id, SEL, ...); */ - type = build_varargs_function_type_list (objc_object_type, - objc_object_type, - objc_selector_type, - NULL_TREE); - - umsg_decl = add_builtin_function (TAG_MSGSEND, - type, 0, NOT_BUILT_IN, - NULL, NULL_TREE); - - umsg_nonnil_decl = add_builtin_function (TAG_MSGSEND_NONNIL, - type, 0, NOT_BUILT_IN, - NULL, NULL_TREE); - - umsg_stret_decl = add_builtin_function (TAG_MSGSEND_STRET, - type, 0, NOT_BUILT_IN, - NULL, NULL_TREE); - - umsg_nonnil_stret_decl = add_builtin_function (TAG_MSGSEND_NONNIL_STRET, - type, 0, NOT_BUILT_IN, - NULL, NULL_TREE); - - /* These can throw, because the function that gets called can throw - in Obj-C++, or could itself call something that can throw even in - Obj-C. */ - TREE_NOTHROW (umsg_decl) = 0; - TREE_NOTHROW (umsg_nonnil_decl) = 0; - TREE_NOTHROW (umsg_stret_decl) = 0; - TREE_NOTHROW (umsg_nonnil_stret_decl) = 0; - - /* id objc_msgSend_Fast (id, SEL, ...) - __attribute__ ((hard_coded_address (OFFS_MSGSEND_FAST))); */ -#ifdef OFFS_MSGSEND_FAST - umsg_fast_decl = add_builtin_function (TAG_MSGSEND_FAST, - type, 0, NOT_BUILT_IN, - NULL, NULL_TREE); - TREE_NOTHROW (umsg_fast_decl) = 0; - DECL_ATTRIBUTES (umsg_fast_decl) - = tree_cons (get_identifier ("hard_coded_address"), - build_int_cst (NULL_TREE, OFFS_MSGSEND_FAST), - NULL_TREE); -#else - /* No direct dispatch available. */ - umsg_fast_decl = umsg_decl; -#endif - - /* id objc_msgSendSuper (struct objc_super *, SEL, ...); */ - /* id objc_msgSendSuper_stret (struct objc_super *, SEL, ...); */ - type = build_varargs_function_type_list (objc_object_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); - umsg_super_stret_decl = add_builtin_function (TAG_MSGSENDSUPER_STRET, - type, 0, NOT_BUILT_IN, 0, - NULL_TREE); - TREE_NOTHROW (umsg_super_decl) = 0; - TREE_NOTHROW (umsg_super_stret_decl) = 0; - - 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); - - /* This is the type of all of the following functions - objc_copyStruct(). */ - 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_copyStruct (void *destination, const void *source, - ptrdiff_t size, BOOL is_atomic, BOOL has_strong); */ - objc_copyStruct_decl = add_builtin_function ("objc_copyStruct", - type, 0, NOT_BUILT_IN, - NULL, NULL_TREE); - TREE_NOTHROW (objc_copyStruct_decl) = 0; - objc_getPropertyStruct_decl = NULL_TREE; - objc_setPropertyStruct_decl = NULL_TREE; - - build_next_objc_exception_stuff (); - if (flag_objc_exceptions && !flag_objc_sjlj_exceptions) - using_eh_for_cleanups (); - lang_hooks.eh_runtime_type = objc_eh_runtime_type; - lang_hooks.eh_personality = objc_eh_personality; -} - -/* --- templates --- */ - -/* 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 objc_cache *cache; - struct _objc_protocol_list *protocols; - #if ABI=1 - const char *ivar_layout; - struct _objc_class_ext *ext; - #else - void *sel_id; - void *gc_object_type; - #endif - }; */ - -/* The 'sel_id' & 'gc_object_type' fields are not used by the NeXT - runtime. We generate them for ABI==0 to maintain backward binary - compatibility. */ - -static void -build_v1_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 objc_cache *cache; */ - ptype = build_pointer_type (xref_tag (RECORD_TYPE, - get_identifier ("objc_cache"))); - add_field_decl (ptype, "cache", &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); - - if (flag_objc_abi >= 1) - { - /* const char *ivar_layout; */ - add_field_decl (const_string_type_node, "ivar_layout", &chain); - - /* struct _objc_class_ext *ext; */ - ptype = build_pointer_type (xref_tag (RECORD_TYPE, - get_identifier (UTAG_CLASS_EXT))); - add_field_decl (ptype, "ext", &chain); - } - else - { - /* void *sel_id; */ - add_field_decl (build_pointer_type (void_type_node), "sel_id", &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; - #if ABI=1 - uint32_t size; // sizeof (struct _objc_category) - struct _objc_property_list *instance_properties; // category's own @property decl. - #endif - }; */ - -static void -build_v1_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); - - if (flag_objc_abi >= 1) - { - add_field_decl (integer_type_node, "size", &chain); - - /* struct _objc_property_list *instance_properties; - This field describes a category's @property declarations. - Properties from inherited protocols are not included. */ - ptype = build_pointer_type (xref_tag (RECORD_TYPE, - get_identifier (UTAG_PROPERTY_LIST))); - add_field_decl (ptype, "instance_properties", &chain); - } - objc_finish_struct (objc_category_template, decls); -} - -/* Begin code generation for protocols... - Modified for ObjC #1 extensions. */ - -/* struct _objc_protocol - { - #if ABI=1 - struct _objc_protocol_extension *isa; - #else - struct _objc_class *isa; - #endif - - 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_v1_protocol_template (void) -{ - tree ptype, decls, *chain = NULL; - - objc_protocol_template = objc_start_struct (get_identifier (UTAG_PROTOCOL)); - - if (flag_objc_abi >= 1) - /* struct _objc_protocol_extension *isa; */ - ptype = build_pointer_type (xref_tag (RECORD_TYPE, - get_identifier (UTAG_PROTOCOL_EXT))); - else - /* 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 identifers --- */ - -static tree -next_runtime_abi_01_super_superclassfield_id (void) -{ - if (!super_superclassfield_id) - super_superclassfield_id = get_identifier ("super_class"); - return super_superclassfield_id; -} - -static tree -next_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_class); - return decl; -} - -static tree -next_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_metaclass); - return decl; -} - -static tree -next_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_category); - return decl; -} - -static tree -next_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_protocol); - return decl; -} - -static tree -next_runtime_abi_01_string_decl (tree type, const char *name, string_section where) -{ - tree var = start_var_decl (type, name); - switch (where) - { - case class_names: - OBJCMETA (var, objc_meta, meta_class_name); - break; - case meth_var_names: - OBJCMETA (var, objc_meta, meta_meth_name); - break; - case meth_var_types: - OBJCMETA (var, objc_meta, meta_meth_type); - break; - case prop_names_attr: - OBJCMETA (var, objc_meta, meta_prop_name_attr); - break; - default: - OBJCMETA (var, objc_meta, meta_base); - break; - } - return var; -} - -/* --- entry --- */ - -static GTY(()) int class_reference_idx; - -static tree -build_class_reference_decl (void) -{ - tree decl; - char buf[BUFSIZE]; - - sprintf (buf, "_OBJC_ClassRefs_%d", class_reference_idx++); - decl = start_var_decl (objc_class_type, buf); - - return decl; -} - -static tree -next_runtime_abi_01_get_class_reference (tree ident) -{ - if (!flag_zero_link) - { - tree *chain; - tree decl; - - for (chain = &cls_ref_chain; *chain; chain = &TREE_CHAIN (*chain)) - if (TREE_VALUE (*chain) == ident) - { - if (! TREE_PURPOSE (*chain)) - TREE_PURPOSE (*chain) = build_class_reference_decl (); - - return TREE_PURPOSE (*chain); - } - - decl = build_class_reference_decl (); - *chain = tree_cons (decl, ident, NULL_TREE); - return decl; - } - else - { - 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 -next_runtime_abi_01_get_arg_type_list_base (vec<tree, va_gc> **argtypes, - tree meth, int context, - int superflag) -{ - tree receiver_type; - - if (superflag) - receiver_type = objc_super_type; - else 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); -} - -static tree -next_runtime_abi_01_receiver_is_class_object (tree receiver) -{ - if (TREE_CODE (receiver) == VAR_DECL - && IS_CLASS (TREE_TYPE (receiver))) - { - /* The receiver is a variable created by build_class_reference_decl. */ - tree chain = cls_ref_chain ; - /* Look up the identifier in the relevant chain. */ - for (; chain; chain = TREE_CHAIN (chain)) - if (TREE_PURPOSE (chain) == receiver) - return TREE_VALUE (chain); - } - return NULL_TREE; -} - -static tree -build_selector_reference_decl (tree ident) -{ - tree decl; - char *t, buf[BUFSIZE]; - - snprintf (buf, BUFSIZE, "_OBJC_SelRef_%s", IDENTIFIER_POINTER (ident)); - t = buf; - while (*t) - { - if (*t==':') - *t = '$'; /* Underscore would clash between foo:bar and foo_bar. */ - t++; - } - decl = start_var_decl (objc_selector_type, buf); - OBJCMETA (decl, objc_meta, meta_sel_refs); - return decl; -} - -static tree -next_runtime_abi_01_build_selector_reference (location_t loc ATTRIBUTE_UNUSED, - tree ident, - tree proto ATTRIBUTE_UNUSED) -{ - tree *chain = &sel_ref_chain; - tree expr; - - while (*chain) - { - if (TREE_VALUE (*chain) == ident) - return TREE_PURPOSE (*chain); - - chain = &TREE_CHAIN (*chain); - } - - expr = build_selector_reference_decl (ident); - - *chain = tree_cons (expr, ident, NULL_TREE); - - return 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, sender_cast, method, t; - tree rcv_p = (super_flag ? objc_super_type : objc_object_type); - vec<tree, va_gc> *parms; - 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); - - 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); - - /* If we are returning a struct in memory, and the address - of that memory location is passed as a hidden first - argument, then change which messenger entry point this - expr will call. NB: Note that sender_cast remains - unchanged (it already has a struct return type). */ - if (!targetm.calls.struct_value_rtx (0, 0) - && (TREE_CODE (ret_type) == RECORD_TYPE - || TREE_CODE (ret_type) == UNION_TYPE) - && targetm.calls.return_in_memory (ret_type, 0)) - sender = (super_flag ? umsg_super_stret_decl - : flag_nil_receivers ? umsg_stret_decl - : umsg_nonnil_stret_decl); - else - sender = (super_flag ? umsg_super_decl - : (flag_nil_receivers ? (flag_objc_direct_dispatch - ? umsg_fast_decl - : umsg_decl) - : umsg_nonnil_decl)); - method = build_fold_addr_expr_loc (loc, sender); - - /* Pass the object to the method. */ - parms->quick_push (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, size_zero_node); - t = build_function_call_vec (loc, t, parms, NULL); - vec_free (parms); - return t; -} - -static tree -next_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) -{ - tree selector = next_runtime_abi_01_build_selector_reference (loc, sel_name, - NULL_TREE); - - return build_objc_method_call (loc, super, method_prototype, - receiver, selector, method_params); -} - -static tree -next_runtime_abi_01_get_protocol_reference (location_t loc, tree p) -{ - tree expr; - - if (!PROTOCOL_FORWARD_DECL (p)) - PROTOCOL_FORWARD_DECL (p) = next_runtime_abi_01_protocol_decl (p); - - expr = build_unary_op (loc, ADDR_EXPR, PROTOCOL_FORWARD_DECL (p), 0); - return convert (objc_protocol_type, expr); -} - -/* For ABI 0/1 and IVAR is just a fixed offset in the class struct. */ - -static tree -next_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 -next_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 -next_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; - - if (!flag_zero_link) - { - super_class = objc_get_class_reference (super_name); - - if (!inst_meth) - - /* If we are in a class method, we must retrieve the - _metaclass_ for the current class, pointed at by - the class's "isa" pointer. The following assumes that - "isa" is the first ivar in a class (which it must be). */ - super_class = - build_indirect_ref (input_location, - build_c_cast (input_location, - build_pointer_type (objc_class_type), - super_class), - RO_UNARY_STAR); - return super_class; - } - - /* else do it the slow way. */ - 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 = objc_get{Meta}Class("CLASS_SUPER_NAME"); */ - return build_function_call (input_location, - super_class, - build_tree_list (NULL_TREE, super_name)); -} - -static bool -next_runtime_abi_01_setup_const_string_class_decl (void) -{ - if (!constant_string_global_id) - { - /* Hopefully, this should not represent a serious limitation. */ - char buf[BUFSIZE]; - snprintf (buf, BUFSIZE, "_%sClassReference", constant_string_class_name); - constant_string_global_id = get_identifier (buf); - } - - string_class_decl = lookup_name (constant_string_global_id); - - return (string_class_decl != NULL_TREE); -} - -static tree -next_runtime_abi_01_build_const_string_constructor (location_t loc, tree string, - int length) -{ - tree constructor, fields, var; - vec<constructor_elt, va_gc> *v = NULL; - - /* NeXT: (NSConstantString *) & ((__builtin_ObjCString) { isa, string, length }) */ - fields = TYPE_FIELDS (internal_const_str_type); - CONSTRUCTOR_APPEND_ELT (v, fields, - build_unary_op (loc, ADDR_EXPR, string_class_decl, 0)); - - fields = DECL_CHAIN (fields); - CONSTRUCTOR_APPEND_ELT (v, fields, - build_unary_op (loc, ADDR_EXPR, string, 1)); - - /* ??? check if this should be long. */ - fields = DECL_CHAIN (fields); - CONSTRUCTOR_APPEND_ELT (v, fields, build_int_cst (NULL_TREE, length)); - constructor = objc_build_constructor (internal_const_str_type, v); - - var = build_decl (input_location, CONST_DECL, NULL, TREE_TYPE (constructor)); - DECL_INITIAL (var) = constructor; - TREE_STATIC (var) = 1; - DECL_CONTEXT (var) = NULL; - OBJCMETA (var, objc_meta, meta_const_str); - return var; -} - -/* --- metadata templates --- */ - -/* This routine builds the following type: - struct _prop_t { - const char * const name; // property name - const char * const attributes; // comma-delimited, encoded, - // property attributes - }; -*/ - -static GTY(()) tree objc_v1_property_template; - -static tree -build_v1_property_template (void) -{ - tree prop_record; - tree decls, *chain = NULL; - - prop_record = objc_start_struct (get_identifier ("_prop_t")); - /* const char * name */ - decls = add_field_decl (string_type_node, "name", &chain); - - /* const char * attribute */ - add_field_decl (string_type_node, "attribute", &chain); - - objc_finish_struct (prop_record, decls); - return prop_record; -} - -/* Build the following type: - - struct _objc_protocol_extension - { - uint32_t size; // sizeof (struct _objc_protocol_extension) - struct objc_method_list *optional_instance_methods; - struct objc_method_list *optional_class_methods; - struct objc_prop_list *instance_properties; - } -*/ - -static GTY(()) tree objc_protocol_extension_template; - -static void -build_v1_objc_protocol_extension_template (void) -{ - tree decls, *chain = NULL; - - objc_protocol_extension_template = - objc_start_struct (get_identifier (UTAG_PROTOCOL_EXT)); - - /* uint32_t size; */ - decls = add_field_decl (integer_type_node, "size", &chain); - - /* struct objc_method_list *optional_instance_methods; */ - add_field_decl (objc_method_list_ptr, "optional_instance_methods", &chain); - - /* struct objc_method_list *optional_class_methods; */ - add_field_decl (objc_method_list_ptr, "optional_class_methods", &chain); - - /* struct objc_prop_list *instance_properties; */ - add_field_decl (objc_prop_list_ptr, "instance_properties", &chain); - - objc_finish_struct (objc_protocol_extension_template, decls); -} - -/* This routine build following struct type: - struct _objc_class_ext - { - uint32_t size; // sizeof(struct _objc_class_ext) - const char *weak_ivar_layout; - struct _prop_list_t *properties; - } -*/ - -static GTY(()) tree objc_class_ext_template; - -static void -build_objc_class_ext_template (void) -{ - tree ptrt, decls, *chain = NULL; - - objc_class_ext_template = objc_start_struct (get_identifier (UTAG_CLASS_EXT)); - - /* uint32_t size; */ - decls = add_field_decl (integer_type_node, "size", &chain); - - /* const char *weak_ivar_layout; */ - add_field_decl (const_string_type_node, "weak_ivar_layout", &chain); - - /* struct _prop_list_t *properties; */ - ptrt = build_pointer_type (xref_tag (RECORD_TYPE, - get_identifier(UTAG_PROPERTY_LIST))); - add_field_decl (ptrt, "properties", &chain); - - objc_finish_struct (objc_class_ext_template, decls); -} - -static void -build_metadata_templates (void) -{ - - if (!objc_method_template) - objc_method_template = build_method_template (); - - - -} - -/* --- emit metadata --- */ - -static tree -generate_v1_meth_descriptor_table (tree chain, tree protocol, - const char *prefix, tree attr) -{ - 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); - /* Get into the right section. */ - OBJCMETA (decl, objc_meta, attr); - finish_var_decl (decl, objc_build_constructor (method_list_template, v)); - return decl; -} - -/* Build protocol ext = - {size, opt_instance_meth, opt_class_meth, instance_props}; - or NULL_TREE if none are present. */ - -static tree -generate_v1_objc_protocol_extension (tree proto_interface, - tree opt_instance_meth, - tree opt_class_meth, - tree instance_props) -{ - int size; - location_t loc; - vec<constructor_elt, va_gc> *v = NULL; - tree decl, expr; - char buf[BUFSIZE]; - - /* If there are no extensions, then don't bother... */ - if (!opt_instance_meth && !opt_class_meth && !instance_props) - return NULL_TREE; - - if (!objc_protocol_extension_template) - build_v1_objc_protocol_extension_template (); - - /* uint32_t size */ - size = TREE_INT_CST_LOW (TYPE_SIZE_UNIT (objc_protocol_extension_template)); - CONSTRUCTOR_APPEND_ELT (v, NULL_TREE, build_int_cst (NULL_TREE, size)); - - /* Try for meaningful diagnostics. */ - loc = DECL_SOURCE_LOCATION (PROTOCOL_FORWARD_DECL (proto_interface)); - - /* struct objc_method_list *optional_instance_methods; */ - if (opt_instance_meth) - expr = convert (objc_method_list_ptr, - build_unary_op (loc, ADDR_EXPR, opt_instance_meth, 0)); - else - expr = convert (objc_method_list_ptr, null_pointer_node); - - CONSTRUCTOR_APPEND_ELT (v, NULL_TREE, expr); - - /* struct objc_method_list *optional_class_methods; */ - if (opt_class_meth) - expr = convert (objc_method_list_ptr, - build_unary_op (loc, ADDR_EXPR, opt_class_meth, 0)); - else - expr = convert (objc_method_list_ptr, null_pointer_node); - - CONSTRUCTOR_APPEND_ELT (v, NULL_TREE, expr); - /* struct objc_prop_list *instance_properties; */ - if (instance_props) - expr = convert (objc_prop_list_ptr, - build_unary_op (loc, ADDR_EXPR, instance_props, 0)); - else - expr = convert (objc_prop_list_ptr, null_pointer_node); - - CONSTRUCTOR_APPEND_ELT (v, NULL_TREE, expr); - snprintf (buf, BUFSIZE, "_OBJC_ProtocolExt_%s", - IDENTIFIER_POINTER (PROTOCOL_NAME (proto_interface))); - - decl = start_var_decl (objc_protocol_extension_template, buf); - expr = objc_build_constructor (TREE_TYPE (decl), v); - OBJCMETA (decl, objc_meta, meta_protocol_extension); - finish_var_decl (decl, expr); - return decl; -} - -/* This routine builds the following type: - struct _prop_list_t { - uint32_t entsize; // sizeof (struct _prop_t) - uint32_t prop_count; - struct _prop_t prop_list [prop_count]; - } -*/ - -static tree -build_v1_property_list_template (tree list_type, int size) -{ - tree property_list_t_record; - tree array_type, decls, *chain = NULL; - - /* anonymous. */ - property_list_t_record = objc_start_struct (NULL_TREE); - - /* uint32_t const entsize */ - decls = add_field_decl (integer_type_node, "entsize", &chain); - - /* int prop_count */ - add_field_decl (integer_type_node, "prop_count", &chain); - - /* struct _prop_t prop_list[]; */ - array_type = build_sized_array_type (list_type, size); - add_field_decl (array_type, "prop_list", &chain); - - objc_finish_struct (property_list_t_record, decls); - return property_list_t_record; -} - -/* This routine builds the initializer list to initialize the - 'struct _prop_t prop_list[]' field of 'struct _prop_list_t' meta-data. */ - -static tree -build_v1_property_table_initializer (tree type, tree context) -{ - tree x; - vec<constructor_elt, va_gc> *inits = NULL; - - if (TREE_CODE (context) == PROTOCOL_INTERFACE_TYPE) - x = CLASS_PROPERTY_DECL (context); - else - x = IMPL_PROPERTY_DECL (context); - - for (; x; x = TREE_CHAIN (x)) - { - vec<constructor_elt, va_gc> *elemlist = NULL; - tree attribute, name_ident = PROPERTY_NAME (x); - - CONSTRUCTOR_APPEND_ELT (elemlist, NULL_TREE, - add_objc_string (name_ident, prop_names_attr)); - - attribute = objc_v2_encode_prop_attr (x); - CONSTRUCTOR_APPEND_ELT (elemlist, NULL_TREE, - add_objc_string (attribute, prop_names_attr)); - - CONSTRUCTOR_APPEND_ELT (inits, NULL_TREE, - objc_build_constructor (type, elemlist)); - } - - return objc_build_constructor (build_array_type (type, 0),inits); -} - -/* This routine builds the 'struct _prop_list_t' variable declaration and - initializes it with its initializer list. TYPE is 'struct _prop_list_t', - NAME is the internal name of this variable, SIZE is number of properties - for this class and LIST is the initializer list for its 'prop_list' field. */ - -static tree -generate_v1_property_table (tree context, tree klass_ctxt) -{ - tree x, decl, initlist, property_list_template; - bool is_proto = false; - vec<constructor_elt, va_gc> *inits = NULL; - int init_val, size = 0; - char buf[BUFSIZE]; - - if (context) - { - gcc_assert (TREE_CODE (context) == PROTOCOL_INTERFACE_TYPE); - x = CLASS_PROPERTY_DECL (context); - is_proto = true; - } - else - x = IMPL_PROPERTY_DECL (klass_ctxt); - - for (; x; x = TREE_CHAIN (x)) - size++; - - if (size == 0) - return NULL_TREE; - - if (!objc_v1_property_template) - objc_v1_property_template = build_v1_property_template (); - - property_list_template = - build_v1_property_list_template (objc_v1_property_template, - size); - initlist = build_v1_property_table_initializer (objc_v1_property_template, - is_proto ? context - : klass_ctxt); - - init_val = TREE_INT_CST_LOW (TYPE_SIZE_UNIT (objc_v1_property_template)); - if (is_proto) - snprintf (buf, BUFSIZE, "_OBJC_ProtocolPropList_%s", - IDENTIFIER_POINTER (PROTOCOL_NAME (context))); - else - snprintf (buf, BUFSIZE, "_OBJC_ClassPropList_%s", - IDENTIFIER_POINTER (CLASS_NAME (klass_ctxt))); - - decl = start_var_decl (property_list_template, buf); - CONSTRUCTOR_APPEND_ELT (inits, NULL_TREE, build_int_cst (NULL_TREE, init_val)); - CONSTRUCTOR_APPEND_ELT (inits, NULL_TREE, build_int_cst (NULL_TREE, size)); - CONSTRUCTOR_APPEND_ELT (inits, NULL_TREE, initlist); - x = objc_build_constructor (TREE_TYPE (decl), inits); - OBJCMETA (decl, objc_meta, meta_proplist); - finish_var_decl (decl, x); - return decl; -} - -static tree -generate_v1_protocol_list (tree i_or_p, tree klass_ctxt) -{ - tree array_type, ptype, refs_decl, lproto, e, plist, attr; - int size = 0; - vec<constructor_elt, va_gc> *v = NULL; - char buf[BUFSIZE]; - - 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))); - attr = meta_proto_ref; - break; - case CLASS_INTERFACE_TYPE: - snprintf (buf, BUFSIZE, "_OBJC_ClassProtocols_%s", - IDENTIFIER_POINTER (CLASS_NAME (i_or_p))); - attr = meta_clas_prot; - 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))); - attr = meta_catg_prot; - 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, attr); - finish_var_decl (refs_decl, - objc_build_constructor (TREE_TYPE (refs_decl), v)); - - return refs_decl; -} - -static tree -build_v1_protocol_initializer (tree type, tree protocol_name, tree protocol_list, - tree inst_methods, tree class_methods, - tree protocol_ext) -{ - tree expr, ttyp; - location_t loc; - vec<constructor_elt, va_gc> *inits = NULL; - - if (!objc_protocol_extension_template) - build_v1_objc_protocol_extension_template (); - - /* TODO: find a better representation of location from the inputs. */ - loc = UNKNOWN_LOCATION; - ttyp = build_pointer_type (objc_protocol_extension_template); - /* Instead of jamming the protocol version number into the isa, we pass - either a pointer to the protocol extension - or NULL. */ - if (protocol_ext) - expr = convert (ttyp, build_unary_op (loc, ADDR_EXPR, protocol_ext, 0)); - else - expr = convert (ttyp, null_pointer_node); - - 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); -} - -/* An updated version of generate_protocols () that emit the protocol - extension for ABI=1. */ - -/* 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 NeXT runtime fixes up all protocols at program startup time, - before main() is entered. It uses a low-level trick to look up all - those symbols, then loops on them and fixes them up. */ - -/* TODO: finish getting rid of passing stuff around in globals. */ - -static GTY(()) tree V1_Protocol_OPT_NST_METHODS_decl; -static GTY(()) tree V1_Protocol_OPT_CLS_METHODS_decl; -static GTY(()) tree V1_ProtocolExt_decl; -static GTY(()) tree V1_Property_decl; - -static void -generate_v1_protocols (void) -{ - tree p; - - /* 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 decl, encoding, initlist, protocol_name_expr; - tree refs_type, refs_decl, refs_expr; - location_t loc; - 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 = TREE_CHAIN (nst_methods); - } - - UOBJC_INSTANCE_METHODS_decl = - generate_v1_meth_descriptor_table (PROTOCOL_NST_METHODS (p), p, - "_OBJC_ProtocolInstanceMethods", - meta_proto_nst_meth); - - while (cls_methods) - { - if (! METHOD_ENCODING (cls_methods)) - { - encoding = encode_method_prototype (cls_methods); - METHOD_ENCODING (cls_methods) = encoding; - } - - cls_methods = TREE_CHAIN (cls_methods); - } - - UOBJC_CLASS_METHODS_decl = - generate_v1_meth_descriptor_table (PROTOCOL_CLS_METHODS (p), p, - "_OBJC_ProtocolClassMethods", - meta_proto_cls_meth); - - /* There should be no optional methods for ABI-0 - but we need to - check all this here before the lists are made. */ - nst_methods = PROTOCOL_OPTIONAL_NST_METHODS (p); - while (nst_methods) - { - if (! METHOD_ENCODING (nst_methods)) - { - encoding = encode_method_prototype (nst_methods); - METHOD_ENCODING (nst_methods) = encoding; - } - nst_methods = TREE_CHAIN (nst_methods); - } - - V1_Protocol_OPT_NST_METHODS_decl = - generate_v1_meth_descriptor_table (PROTOCOL_OPTIONAL_NST_METHODS (p), p, - "_OBJC_OptionalProtocolInstanceMethods", - meta_proto_nst_meth); - - cls_methods = PROTOCOL_OPTIONAL_CLS_METHODS (p); - while (cls_methods) - { - if (! METHOD_ENCODING (cls_methods)) - { - encoding = encode_method_prototype (cls_methods); - METHOD_ENCODING (cls_methods) = encoding; - } - - cls_methods = TREE_CHAIN (cls_methods); - } - - V1_Protocol_OPT_CLS_METHODS_decl = - generate_v1_meth_descriptor_table (PROTOCOL_OPTIONAL_CLS_METHODS (p), p, - "_OBJC_OptionalProtocolClassMethods", - meta_proto_cls_meth); - - if (PROTOCOL_LIST (p)) - refs_decl = generate_v1_protocol_list (p, objc_implementation_context); - else - refs_decl = 0; - - /* static struct objc_protocol _OBJC_PROTOCOL_<mumble>; */ - protocol_name_expr = add_objc_string (PROTOCOL_NAME (p), class_names); - /* TODO: more locations to be fixed up... */ - loc = UNKNOWN_LOCATION; - refs_type = - build_pointer_type (build_pointer_type (objc_protocol_template)); - if (refs_decl) - refs_expr = convert (refs_type, - build_unary_op (loc, ADDR_EXPR, refs_decl, 0)); - else - refs_expr = convert (refs_type, null_pointer_node); - - if (flag_objc_abi < 1) - { - /* Original ABI. */ - 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); - continue; - } - - /* else - V1 extensions. */ - - V1_Property_decl = - generate_v1_property_table (p, NULL_TREE); - - V1_ProtocolExt_decl = - generate_v1_objc_protocol_extension (p, - V1_Protocol_OPT_NST_METHODS_decl, - V1_Protocol_OPT_CLS_METHODS_decl, - V1_Property_decl); - - initlist = build_v1_protocol_initializer (TREE_TYPE (decl), - protocol_name_expr, refs_expr, - UOBJC_INSTANCE_METHODS_decl, - UOBJC_CLASS_METHODS_decl, - V1_ProtocolExt_decl); - finish_var_decl (decl, initlist); - } -} - -static tree -generate_dispatch_table (tree chain, const char *name, tree attr) -{ - tree decl, method_list_template, initlist; - vec<constructor_elt, va_gc> *v = NULL; - int size;; - - if (!chain || !name || !(size = list_length (chain))) - return NULL_TREE; - - 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, attr); - finish_var_decl (decl, - objc_build_constructor (TREE_TYPE (decl), v)); - - return decl; -} - -/* Init a category. */ -static tree -build_v1_category_initializer (tree type, tree cat_name, tree class_name, - tree inst_methods, tree class_methods, - tree protocol_list, tree property_list, - location_t loc) -{ - tree expr, ltyp; - vec<constructor_elt, va_gc> *v = NULL; - - 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); - - if (flag_objc_abi >= 1) - { - int val = TREE_INT_CST_LOW (TYPE_SIZE_UNIT (objc_category_template)); - expr = build_int_cst (NULL_TREE, val); - CONSTRUCTOR_APPEND_ELT (v, NULL_TREE, expr); - ltyp = objc_prop_list_ptr; - if (property_list) - expr = convert (ltyp, build_unary_op (loc, ADDR_EXPR, property_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> = { ... }; */ -/* TODO: get rid of passing stuff around in globals. */ -static void -generate_v1_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; - location_t loc; - char buf[BUFSIZE]; - - cat_decl = impent->class_decl; - loc = DECL_SOURCE_LOCATION (cat_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_v1_protocol_list (category, cat); - } - else - protocol_decl = 0; - - if (flag_objc_abi >= 1) - V1_Property_decl = generate_v1_property_table (NULL_TREE, cat); - else - V1_Property_decl = NULL_TREE; - - 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, - meta_cati_meth); - } - - 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, - meta_catc_meth); - } - - initlist = build_v1_category_initializer (TREE_TYPE (cat_decl), - cat_name_expr, class_name_expr, - inst_methods, class_methods, - protocol_decl, V1_Property_decl, - loc); - - finish_var_decl (cat_decl, initlist); - impent->class_decl = cat_decl; -} - -/* This routine builds the class extension used by v1 NeXT. */ - -static tree -generate_objc_class_ext (tree property_list, tree context) -{ - tree decl, expr, ltyp; - tree weak_ivar_layout_tree; - int size; - location_t loc; - vec<constructor_elt, va_gc> *v = NULL; - char buf[BUFSIZE]; - - /* TODO: pass the loc in or find it from args. */ - loc = UNKNOWN_LOCATION; - - /* const char *weak_ivar_layout - TODO: Figure the ivar layouts out... */ - weak_ivar_layout_tree = NULL_TREE; - - if (!property_list && !weak_ivar_layout_tree) - return NULL_TREE; - - if (!objc_class_ext_template) - build_objc_class_ext_template (); - - /* uint32_t size */ - size = TREE_INT_CST_LOW (TYPE_SIZE_UNIT (objc_class_ext_template)); - CONSTRUCTOR_APPEND_ELT (v, NULL_TREE, build_int_cst (NULL_TREE, size)); - - ltyp = const_string_type_node; - if (weak_ivar_layout_tree) - expr = convert (ltyp, weak_ivar_layout_tree); - else - expr = convert (ltyp, null_pointer_node); - CONSTRUCTOR_APPEND_ELT (v, NULL_TREE, expr); - - /* struct _prop_list_t *properties; */ - ltyp = objc_prop_list_ptr; - if (property_list) - expr = convert (ltyp, build_unary_op (loc, ADDR_EXPR, property_list, 0)); - else - expr = convert (ltyp, null_pointer_node); - CONSTRUCTOR_APPEND_ELT (v, NULL_TREE, expr); - - snprintf (buf, BUFSIZE, "_OBJC_ClassExt_%s", - IDENTIFIER_POINTER (CLASS_NAME (context))); - decl = start_var_decl (objc_class_ext_template, buf); - expr = objc_build_constructor (TREE_TYPE (decl), v); - OBJCMETA (decl, objc_meta, meta_class_extension); - finish_var_decl (decl, expr); - return 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 objc_cache *cache; - struct objc_protocol_list *protocols; - #if ABI >= 1 - const char *ivar_layout; - struct _objc_class_ext *ext; - #else - void *sel_id; - void *gc_object_type; - #endif - }; */ - -static tree -build_v1_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 class_ext) -{ - tree expr, ltyp; - location_t loc; - vec<constructor_elt, va_gc> *v = NULL; - - /* TODO: fish the location out of the input data. */ - loc = UNKNOWN_LOCATION; - - /* 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 = */ - ltyp = objc_ivar_list_ptr; - if (ivar_list) - expr = convert (ltyp, build_unary_op (loc, ADDR_EXPR, ivar_list, 0)); - else - expr = convert (ltyp, null_pointer_node); - CONSTRUCTOR_APPEND_ELT (v, NULL_TREE, expr); - - /* objc_method_list = */ - ltyp = objc_method_list_ptr; - if (dispatch_table) - expr = convert (ltyp, build_unary_op (loc, ADDR_EXPR, dispatch_table, 0)); - else - expr = convert (ltyp, null_pointer_node); - CONSTRUCTOR_APPEND_ELT (v, NULL_TREE, expr); - - ltyp = build_pointer_type (xref_tag (RECORD_TYPE, - get_identifier ("objc_cache"))); - /* method_cache = */ - CONSTRUCTOR_APPEND_ELT (v, NULL_TREE, convert (ltyp, null_pointer_node)); - - /* 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); - - if (flag_objc_abi >= 1) - { - /* TODO: figure out the ivar_layout stuff. */ - expr = convert (const_string_type_node, null_pointer_node); - CONSTRUCTOR_APPEND_ELT (v, NULL_TREE, expr); - if (!objc_class_ext_template) - build_objc_class_ext_template (); - ltyp = build_pointer_type (objc_class_ext_template); - if (class_ext) - expr = convert (ltyp, build_unary_op (loc, ADDR_EXPR, class_ext, 0)); - else - expr = convert (ltyp, null_pointer_node); - CONSTRUCTOR_APPEND_ELT (v, NULL_TREE, expr); - } - else - { - /* sel_id = NULL */ - CONSTRUCTOR_APPEND_ELT (v, NULL_TREE, null_pointer_node); - - /* gc_object_type = NULL */ - CONSTRUCTOR_APPEND_ELT (v, NULL_TREE, null_pointer_node); - } - return objc_build_constructor (type, v); -} - -static tree -generate_ivars_list (tree chain, const char *name, tree attr) -{ - 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, attr); - 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_v1_class_structs (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 class_ext_decl = NULL_TREE, props = NULL_TREE; - tree inst_methods = NULL_TREE, class_methods = NULL_TREE; - tree chain, inst_ivars = NULL_TREE, class_ivars = NULL_TREE; - int cls_flags; - location_t loc; - char buf[BUFSIZE]; - -/* objc_implementation_context = impent->imp_context; - implementation_template = impent->imp_template;*/ - class_decl = impent->class_decl; - meta_decl = impent->meta_decl; - cls_flags = impent->has_cxx_cdtors ? CLS_HAS_CXX_STRUCTORS : 0 ; - - loc = DECL_SOURCE_LOCATION (impent->class_decl); - - if (flag_objc_abi >= 1) - { - /* ABI=1 additions. */ - props = generate_v1_property_table (NULL_TREE, impent->imp_context); - class_ext_decl = generate_objc_class_ext (props, impent->imp_context); - } - - 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); - super_expr = add_objc_string (my_super_id, class_names); - } - else - { - /* No super class. */ - my_root_id = CLASS_NAME (impent->imp_template); - super_expr = null_pointer_node; - } - - /* Install class `isa' and `super' pointers at runtime. */ - cast_type = build_pointer_type (objc_class_template); - 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_v1_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, meta_clac_meth); - } - - 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, meta_clac_vars); - } - /* TODO: get rid of hidden passing of stuff in globals. */ - /* UOBJC_INSTANCE/CLASS_Variables_decl made in generate_ivarlists(). */ - - name_expr = add_objc_string (CLASS_NAME (impent->imp_template), class_names); - - /* static struct objc_class _OBJC_METACLASS_Foo = { ... }; */ - - initlist = build_v1_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, NULL_TREE); - - 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, meta_clai_meth); - } - - 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, meta_clai_vars); - } - - initlist = build_v1_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, class_ext_decl); - - finish_var_decl (class_decl, initlist); - impent->class_decl = class_decl; -} - -/* --- Output NeXT V1 Metadata --- */ - -/* Create the initial value for the `defs' field of _objc_symtab. - This is a CONSTRUCTOR. */ - -static tree -init_def_list (tree type) -{ - tree expr; - location_t loc; - struct imp_entry *impent; - 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); - } - } - - 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, *chain = NULL; - - 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); - - if (imp_count || cat_count) - { - /* void *defs[imp_count + cat_count (+ 1)]; */ - /* NB: The index is one less than the size of the array. */ - int index = imp_count + cat_count; - tree array_type = build_sized_array_type (ptr_type_node, index); - 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) -{ - vec<constructor_elt, va_gc> *v = NULL; - - /* sel_ref_cnt = { ..., 5, ... } */ - - CONSTRUCTOR_APPEND_ELT (v, NULL_TREE, - build_int_cst (long_integer_type_node, 0)); - - /* refs = { ..., _OBJC_SELECTOR_TABLE, ... } */ - - CONSTRUCTOR_APPEND_ELT (v, NULL_TREE, - convert (build_pointer_type (objc_selector_type), - integer_zero_node)); - - /* 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, ...}, ... } */ - - if (imp_count || cat_count) - { - tree 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"); - /* Allow the runtime to mark meta-data such that it can be assigned to target - specific sections by the back-end. */ - OBJCMETA (UOBJC_SYMBOLS_decl, objc_meta, meta_symtab); - finish_var_decl (UOBJC_SYMBOLS_decl, - init_objc_symtab (TREE_TYPE (UOBJC_SYMBOLS_decl))); -} - -/* Any target implementing NeXT ObjC m32 ABI has to ensure that objects - refer to, and define, symbols that enforce linkage of classes into the - executable image, preserving unix archive semantics. - - At present (4.8), the only targets implementing this are Darwin; these - use top level asms to implement a scheme (see config/darwin-c.c). The - latter method is a hack, but compatible with LTO see also PR48109 for - further discussion and other possible methods. */ - -static void -handle_next_class_ref (tree chain ATTRIBUTE_UNUSED) -{ - if (targetcm.objc_declare_unresolved_class_reference) - { - const char *name = IDENTIFIER_POINTER (TREE_VALUE (chain)); - char *string = (char *) alloca (strlen (name) + 30); - sprintf (string, ".objc_class_name_%s", name); - targetcm.objc_declare_unresolved_class_reference (string); - } -} - -static void -handle_next_impent (struct imp_entry *impent ATTRIBUTE_UNUSED) -{ - if (targetcm.objc_declare_class_definition) - { - char buf[BUFSIZE]; - - switch (TREE_CODE (impent->imp_context)) - { - case CLASS_IMPLEMENTATION_TYPE: - snprintf (buf, BUFSIZE, ".objc_class_name_%s", - IDENTIFIER_POINTER (CLASS_NAME (impent->imp_context))); - break; - case CATEGORY_IMPLEMENTATION_TYPE: - snprintf (buf, BUFSIZE, "*.objc_category_name_%s_%s", - IDENTIFIER_POINTER (CLASS_NAME (impent->imp_context)), - IDENTIFIER_POINTER (CLASS_SUPER_NAME (impent->imp_context))); - break; - default: - return; - } - targetcm.objc_declare_class_definition (buf); - } -} - -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_class_reference); - finish_var_decl (decl, expr); - return; -} - - -/* The Fix-and-Continue functionality available in Mac OS X 10.3 and - later requires that ObjC translation units participating in F&C be - specially marked. The following routine accomplishes this. */ - -/* static int _OBJC_IMAGE_INFO[2] = { 0, 1 }; */ - -static void -generate_objc_image_info (void) -{ - tree decl; - int flags - = ((flag_replace_objc_classes && imp_count ? 1 : 0) - | (flag_objc_gc ? 2 : 0)); - vec<constructor_elt, va_gc> *v = NULL; - tree array_type; - - array_type = build_sized_array_type (integer_type_node, 2); - - decl = start_var_decl (array_type, "_OBJC_ImageInfo"); - - CONSTRUCTOR_APPEND_ELT (v, NULL_TREE, integer_zero_node); - CONSTRUCTOR_APPEND_ELT (v, NULL_TREE, build_int_cst (integer_type_node, flags)); - /* The runtime wants this and refers to it in a manner hidden from the compiler. - So we must force the output. */ - DECL_PRESERVE_P (decl) = 1; - OBJCMETA (decl, objc_meta, meta_info); - finish_var_decl (decl, objc_build_constructor (TREE_TYPE (decl), v)); -} - -static void -objc_generate_v1_next_metadata (void) -{ - struct imp_entry *impent; - tree chain, attr; - long vers; - - /* FIXME: Make sure that we generate no metadata if there is nothing - to put into it. */ - - if (objc_static_instances) - gcc_unreachable (); /* Not for NeXT */ - - build_metadata_templates (); - 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_v1_class_structs (impent); - else - generate_v1_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_next_selector_translation_table (); - - if (protocol_chain) - generate_v1_protocols (); - - /* Pass summary information to the runtime. */ - if (imp_count || cat_count) - generate_objc_symtab_decl (); - - vers = OBJC_VERSION; - attr = build_tree_list (objc_meta, meta_modules); - build_module_descriptor (vers, attr); - - /* This conveys information on GC usage and zero-link. */ - generate_objc_image_info (); - - /* Dump the class references. This forces the appropriate classes - to be linked into the executable image, preserving unix archive - semantics. */ - for (chain = cls_ref_chain; chain; chain = TREE_CHAIN (chain)) - { - handle_next_class_ref (chain); - if (TREE_PURPOSE (chain)) - generate_classref_translation_entry (chain); - } - - for (impent = imp_list; impent; impent = impent->next) - handle_next_impent (impent); - - /* Emit the strings tables. */ - generate_strings (); -} - -/* --- exceptions stuff --- */ - -/* Predefine the following data type: - - struct _objc_exception_data - { - int buf[OBJC_JBLEN]; - void *pointers[4]; - }; */ - -/* The following yuckiness should prevent users from having to #include - <setjmp.h> in their code... */ - -/* Define to a harmless positive value so the below code doesn't die. */ -#ifndef OBJC_JBLEN -#define OBJC_JBLEN 18 -#endif - -static void -build_next_objc_exception_stuff (void) -{ - tree decls, temp_type, *chain = NULL; - - objc_exception_data_template - = objc_start_struct (get_identifier (UTAG_EXCDATA)); - - /* int buf[OBJC_JBLEN]; */ - - temp_type = build_sized_array_type (integer_type_node, OBJC_JBLEN); - decls = add_field_decl (temp_type, "buf", &chain); - - /* void *pointers[4]; */ - - temp_type = build_sized_array_type (ptr_type_node, 4); - add_field_decl (temp_type, "pointers", &chain); - - objc_finish_struct (objc_exception_data_template, decls); - - /* int _setjmp(...); */ - /* If the user includes <setjmp.h>, this shall be superseded by - 'int _setjmp(jmp_buf);' */ - temp_type = build_varargs_function_type_list (integer_type_node, NULL_TREE); - objc_setjmp_decl - = add_builtin_function (TAG_SETJMP, temp_type, 0, NOT_BUILT_IN, NULL, NULL_TREE); - - /* id objc_exception_extract(struct _objc_exception_data *); */ - temp_type - = build_function_type_list (objc_object_type, - build_pointer_type (objc_exception_data_template), - NULL_TREE); - objc_exception_extract_decl - = add_builtin_function (TAG_EXCEPTIONEXTRACT, temp_type, 0, NOT_BUILT_IN, NULL, - NULL_TREE); - /* void objc_exception_try_enter(struct _objc_exception_data *); */ - /* void objc_exception_try_exit(struct _objc_exception_data *); */ - temp_type - = build_function_type_list (void_type_node, - build_pointer_type (objc_exception_data_template), - NULL_TREE); - objc_exception_try_enter_decl - = add_builtin_function (TAG_EXCEPTIONTRYENTER, temp_type, 0, NOT_BUILT_IN, NULL, - NULL_TREE); - objc_exception_try_exit_decl - = add_builtin_function (TAG_EXCEPTIONTRYEXIT, temp_type, 0, NOT_BUILT_IN, NULL, - NULL_TREE); - - /* int objc_exception_match(id, id); */ - temp_type - = build_function_type_list (integer_type_node, - objc_object_type, objc_object_type, NULL_TREE); - objc_exception_match_decl - = add_builtin_function (TAG_EXCEPTIONMATCH, temp_type, 0, NOT_BUILT_IN, NULL, - NULL_TREE); - - /* id objc_assign_ivar (id, id, unsigned int); */ - /* id objc_assign_ivar_Fast (id, id, unsigned int) - __attribute__ ((hard_coded_address (OFFS_ASSIGNIVAR_FAST))); */ - temp_type - = build_function_type_list (objc_object_type, - objc_object_type, - objc_object_type, - unsigned_type_node, - NULL_TREE); - objc_assign_ivar_decl - = add_builtin_function (TAG_ASSIGNIVAR, temp_type, 0, NOT_BUILT_IN, - NULL, NULL_TREE); -#ifdef OFFS_ASSIGNIVAR_FAST - objc_assign_ivar_fast_decl - = add_builtin_function (TAG_ASSIGNIVAR_FAST, temp_type, 0, - NOT_BUILT_IN, NULL, NULL_TREE); - DECL_ATTRIBUTES (objc_assign_ivar_fast_decl) - = tree_cons (get_identifier ("hard_coded_address"), - build_int_cst (NULL_TREE, OFFS_ASSIGNIVAR_FAST), - NULL_TREE); -#else - /* Default to slower ivar method. */ - objc_assign_ivar_fast_decl = objc_assign_ivar_decl; -#endif - - /* id objc_assign_global (id, id *); */ - /* id objc_assign_strongCast (id, id *); */ - temp_type = build_function_type_list (objc_object_type, - objc_object_type, - build_pointer_type (objc_object_type), - NULL_TREE); - objc_assign_global_decl - = add_builtin_function (TAG_ASSIGNGLOBAL, temp_type, 0, NOT_BUILT_IN, NULL, - NULL_TREE); - objc_assign_strong_cast_decl - = add_builtin_function (TAG_ASSIGNSTRONGCAST, temp_type, 0, NOT_BUILT_IN, NULL, - NULL_TREE); -} - -/* --- NeXT V1 SJLJ Exceptions --- */ - -/* Build "objc_exception_try_exit(&_stack)". */ - -static tree -next_sjlj_build_try_exit (struct objc_try_context **ctcp) -{ - tree t; - t = build_fold_addr_expr_loc (input_location, (*ctcp)->stack_decl); - t = tree_cons (NULL, t, NULL); - t = build_function_call (input_location, - objc_exception_try_exit_decl, t); - return t; -} - -/* Build - objc_exception_try_enter (&_stack); - if (_setjmp(&_stack.buf)) - ; - else - ; - Return the COND_EXPR. Note that the THEN and ELSE fields are left - empty, ready for the caller to fill them in. */ - -static tree -next_sjlj_build_enter_and_setjmp (struct objc_try_context **ctcp) -{ - tree t, enter, sj, cond; - - t = build_fold_addr_expr_loc (input_location, (*ctcp)->stack_decl); - t = tree_cons (NULL, t, NULL); - enter = build_function_call (input_location, - objc_exception_try_enter_decl, t); - - t = objc_build_component_ref ((*ctcp)->stack_decl, - get_identifier ("buf")); - t = build_fold_addr_expr_loc (input_location, t); -#ifdef OBJCPLUS - /* Convert _setjmp argument to type that is expected. */ - if (prototype_p (TREE_TYPE (objc_setjmp_decl))) - t = convert (TREE_VALUE (TYPE_ARG_TYPES (TREE_TYPE (objc_setjmp_decl))), t); - else - t = convert (ptr_type_node, t); -#else - t = convert (ptr_type_node, t); -#endif - t = tree_cons (NULL, t, NULL); - sj = build_function_call (input_location, - objc_setjmp_decl, t); - - cond = build2 (COMPOUND_EXPR, TREE_TYPE (sj), enter, sj); - cond = c_common_truthvalue_conversion (input_location, cond); - - return build3 (COND_EXPR, void_type_node, cond, NULL, NULL); -} - -/* Build: - - DECL = objc_exception_extract(&_stack); */ - -static tree -next_sjlj_build_exc_extract (struct objc_try_context **ctcp, tree decl) -{ - tree t; - - t = build_fold_addr_expr_loc (input_location, (*ctcp)->stack_decl); - t = tree_cons (NULL, t, NULL); - t = build_function_call (input_location, - objc_exception_extract_decl, t); - t = convert (TREE_TYPE (decl), t); - t = build2 (MODIFY_EXPR, void_type_node, decl, t); - - return t; -} - -/* Build - if (objc_exception_match(obj_get_class(TYPE), _caught) - BODY - else if (...) - ... - else - { - _rethrow = _caught; - objc_exception_try_exit(&_stack); - } - from the sequence of CATCH_EXPRs in the current try context. */ - -static tree -next_sjlj_build_catch_list (struct objc_try_context **ctcp) -{ - tree_stmt_iterator i = tsi_start ((*ctcp)->catch_list); - tree catch_seq, t; - tree *last = &catch_seq; - bool saw_id = false; - - for (; !tsi_end_p (i); tsi_next (&i)) - { - tree stmt = tsi_stmt (i); - tree type = CATCH_TYPES (stmt); - tree body = CATCH_BODY (stmt); - - if (type != error_mark_node - && objc_is_object_id (TREE_TYPE (type))) - { - *last = body; - saw_id = true; - break; - } - else - { - tree args, cond; - - if (type == error_mark_node) - cond = error_mark_node; - else - { - args = tree_cons (NULL, (*ctcp)->caught_decl, NULL); - t = objc_get_class_reference (OBJC_TYPE_NAME (TREE_TYPE (type))); - args = tree_cons (NULL, t, args); - t = build_function_call (input_location, - objc_exception_match_decl, args); - cond = c_common_truthvalue_conversion (input_location, t); - } - t = build3 (COND_EXPR, void_type_node, cond, body, NULL); - SET_EXPR_LOCATION (t, EXPR_LOCATION (stmt)); - - *last = t; - last = &COND_EXPR_ELSE (t); - } - } - - if (!saw_id) - { - t = build2 (MODIFY_EXPR, void_type_node, (*ctcp)->rethrow_decl, - (*ctcp)->caught_decl); - SET_EXPR_LOCATION (t, (*ctcp)->end_catch_locus); - append_to_statement_list (t, last); - - t = next_sjlj_build_try_exit (ctcp); - SET_EXPR_LOCATION (t, (*ctcp)->end_catch_locus); - append_to_statement_list (t, last); - } - - return catch_seq; -} - -/* Build a complete @try-@catch-@finally block for legacy Darwin setjmp - exception handling. We aim to build: - - { - struct _objc_exception_data _stack; - id _rethrow = 0; - try - { - objc_exception_try_enter (&_stack); - if (_setjmp(&_stack.buf)) - { - id _caught = objc_exception_extract(&_stack); - objc_exception_try_enter (&_stack); - if (_setjmp(&_stack.buf)) - _rethrow = objc_exception_extract(&_stack); - else - CATCH-LIST - } - else - TRY-BLOCK - } - finally - { - if (!_rethrow) - objc_exception_try_exit(&_stack); - FINALLY-BLOCK - if (_rethrow) - objc_exception_throw(_rethrow); - } - } - - If CATCH-LIST is empty, we can omit all of the block containing - "_caught" except for the setting of _rethrow. Note the use of - a real TRY_FINALLY_EXPR here, which is not involved in EH per-se, - but handles goto and other exits from the block. */ - -static tree -next_sjlj_build_try_catch_finally (struct objc_try_context **ctcp) -{ - tree rethrow_decl, stack_decl, t; - tree catch_seq, try_fin, bind; - struct objc_try_context *cur_try_context = *ctcp; - - /* Create the declarations involved. */ - t = xref_tag (RECORD_TYPE, get_identifier (UTAG_EXCDATA)); - stack_decl = objc_create_temporary_var (t, NULL); - cur_try_context->stack_decl = stack_decl; - - rethrow_decl = objc_create_temporary_var (objc_object_type, NULL); - cur_try_context->rethrow_decl = rethrow_decl; - TREE_CHAIN (rethrow_decl) = stack_decl; - - /* Build the outermost variable binding level. */ - bind = build3 (BIND_EXPR, void_type_node, rethrow_decl, NULL, NULL); - SET_EXPR_LOCATION (bind, cur_try_context->try_locus); - TREE_SIDE_EFFECTS (bind) = 1; - - /* Initialize rethrow_decl. */ - t = build2 (MODIFY_EXPR, void_type_node, rethrow_decl, - convert (objc_object_type, null_pointer_node)); - SET_EXPR_LOCATION (t, cur_try_context->try_locus); - append_to_statement_list (t, &BIND_EXPR_BODY (bind)); - - /* Build the outermost TRY_FINALLY_EXPR. */ - try_fin = build2 (TRY_FINALLY_EXPR, void_type_node, NULL, NULL); - SET_EXPR_LOCATION (try_fin, cur_try_context->try_locus); - TREE_SIDE_EFFECTS (try_fin) = 1; - append_to_statement_list (try_fin, &BIND_EXPR_BODY (bind)); - - /* Create the complete catch sequence. */ - if (cur_try_context->catch_list) - { - tree caught_decl = objc_build_exc_ptr (ctcp); - catch_seq = build_stmt (input_location, BIND_EXPR, caught_decl, NULL, NULL); - TREE_SIDE_EFFECTS (catch_seq) = 1; - - t = next_sjlj_build_exc_extract (ctcp, caught_decl); - append_to_statement_list (t, &BIND_EXPR_BODY (catch_seq)); - - t = next_sjlj_build_enter_and_setjmp (ctcp); - COND_EXPR_THEN (t) = next_sjlj_build_exc_extract (ctcp, rethrow_decl); - COND_EXPR_ELSE (t) = next_sjlj_build_catch_list (ctcp); - append_to_statement_list (t, &BIND_EXPR_BODY (catch_seq)); - } - else - catch_seq = next_sjlj_build_exc_extract (ctcp, rethrow_decl); - SET_EXPR_LOCATION (catch_seq, cur_try_context->end_try_locus); - - /* Build the main register-and-try if statement. */ - t = next_sjlj_build_enter_and_setjmp (ctcp); - SET_EXPR_LOCATION (t, cur_try_context->try_locus); - COND_EXPR_THEN (t) = catch_seq; - COND_EXPR_ELSE (t) = cur_try_context->try_body; - TREE_OPERAND (try_fin, 0) = t; - - /* Build the complete FINALLY statement list. */ - t = next_sjlj_build_try_exit (ctcp); - t = build_stmt (input_location, COND_EXPR, - c_common_truthvalue_conversion - (input_location, rethrow_decl), - NULL, t); - SET_EXPR_LOCATION (t, cur_try_context->finally_locus); - append_to_statement_list (t, &TREE_OPERAND (try_fin, 1)); - - append_to_statement_list (cur_try_context->finally_body, - &TREE_OPERAND (try_fin, 1)); - - t = tree_cons (NULL, rethrow_decl, NULL); - t = build_function_call (input_location, - objc_exception_throw_decl, t); - t = build_stmt (input_location, COND_EXPR, - c_common_truthvalue_conversion (input_location, - rethrow_decl), - t, NULL); - SET_EXPR_LOCATION (t, cur_try_context->end_finally_locus); - append_to_statement_list (t, &TREE_OPERAND (try_fin, 1)); - - return bind; -} - -/* We do not expect this to be used at the moment. - If (a) it is possible to implement unwinder exceptions. - (b) we do it... then it might be possibly useful. -*/ -static GTY(()) tree objc_eh_personality_decl; - -static tree -objc_eh_runtime_type (tree type) -{ - tree ident, eh_id, decl, str; - - gcc_unreachable (); - if (type == error_mark_node) - { - /* 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))) - { - ident = get_identifier ("id"); - goto make_err_class; - } - - if (!POINTER_TYPE_P (type) || !TYPED_OBJECT (TREE_TYPE (type))) - { -#ifdef OBJCPLUS - /* This routine is also called for c++'s catch clause; in which case, - we use c++'s typeinfo decl. */ - return build_eh_type_type (type); -#else - error ("non-objective-c type '%T' 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; -} - -/* For NeXT ABI 0 and 1, the personality routines are just those of the - underlying language. */ - -static tree -objc_eh_personality (void) -{ - if (!objc_eh_personality_decl) -#ifndef OBJCPLUS - objc_eh_personality_decl = build_personality_function ("gcc"); -#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, objc_exception_throw_decl, parms, NULL); - vec_free (parms); - return add_stmt (t); -} - -/* Build __builtin_eh_pointer, or the moral equivalent. In the case - of Darwin, we'll arrange for it to be initialized (and associated - with a binding) later. */ - -static tree -objc_build_exc_ptr (struct objc_try_context **cur_try_context) -{ - if (flag_objc_sjlj_exceptions) - { - tree var = (*cur_try_context)->caught_decl; - if (!var) - { - var = objc_create_temporary_var (objc_object_type, NULL); - (*cur_try_context)->caught_decl = var; - } - return var; - } - else - { - 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. We treat ellipsis the same way as catching - with 'id xyz'. */ - 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) -{ - tree stmt; - struct objc_try_context *c = *cur_try_context; - /* If we're doing Darwin setjmp exceptions, build the big nasty. */ - if (flag_objc_sjlj_exceptions) - { - bool save = in_late_binary_op; - in_late_binary_op = true; - if (!c->finally_body) - { - c->finally_locus = input_location; - c->end_finally_locus = input_location; - } - stmt = next_sjlj_build_try_catch_finally (cur_try_context); - in_late_binary_op = save; - } - else - /* This doesn't happen at the moment... but maybe one day... */ - { - /* Otherwise, nest the CATCH inside a FINALLY. */ - 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-next-runtime-abi-01.h" |