blob: dea85b32d34b832cc0a18979a07aef4a1db919b5 [file] [log] [blame]
/* Implement classes and message passing for Objective C.
Copyright (C) 1992, 1993, 1994, 1995, 1997, 1998, 1999, 2000, 2001, 2002
Free Software Foundation, Inc.
Contributed by Steve Naroff.
This file is part of GNU CC.
GNU CC 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 2, or (at your option)
any later version.
GNU CC 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 GNU CC; see the file COPYING. If not, write to
the Free Software Foundation, 59 Temple Place - Suite 330,
Boston, MA 02111-1307, USA. */
/* Purpose: This module implements the Objective-C 4.0 language.
compatibility issues (with the Stepstone translator):
- does not recognize the following 3.3 constructs.
@requires, @classes, @messages, = (...)
- methods with variable arguments must conform to ANSI standard.
- tagged structure definitions that appear in BOTH the interface
and implementation are not allowed.
- public/private: all instance variables are public within the
context of the implementation...I consider this to be a bug in
the translator.
- statically allocated objects are not supported. the user will
receive an error if this service is requested.
code generation `options':
*/
#include "config.h"
#include "system.h"
#include "tree.h"
#include "rtl.h"
#include "expr.h"
#include "c-tree.h"
#include "c-common.h"
#include "flags.h"
#include "objc-act.h"
#include "input.h"
#include "except.h"
#include "function.h"
#include "output.h"
#include "toplev.h"
#include "ggc.h"
#include "debug.h"
#include "target.h"
#include "diagnostic.h"
/* This is the default way of generating a method name. */
/* I am not sure it is really correct.
Perhaps there's a danger that it will make name conflicts
if method names contain underscores. -- rms. */
#ifndef OBJC_GEN_METHOD_LABEL
#define OBJC_GEN_METHOD_LABEL(BUF, IS_INST, CLASS_NAME, CAT_NAME, SEL_NAME, NUM) \
do { \
char *temp; \
sprintf ((BUF), "_%s_%s_%s_%s", \
((IS_INST) ? "i" : "c"), \
(CLASS_NAME), \
((CAT_NAME)? (CAT_NAME) : ""), \
(SEL_NAME)); \
for (temp = (BUF); *temp; temp++) \
if (*temp == ':') *temp = '_'; \
} while (0)
#endif
/* These need specifying. */
#ifndef OBJC_FORWARDING_STACK_OFFSET
#define OBJC_FORWARDING_STACK_OFFSET 0
#endif
#ifndef OBJC_FORWARDING_MIN_OFFSET
#define OBJC_FORWARDING_MIN_OFFSET 0
#endif
/* Set up for use of obstacks. */
#include "obstack.h"
/* This obstack is used to accumulate the encoding of a data type. */
static struct obstack util_obstack;
/* This points to the beginning of obstack contents,
so we can free the whole contents. */
char *util_firstobj;
/* for encode_method_def */
#include "rtl.h"
/* 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_next_runtime ? 5 : 8)
#define PROTOCOL_VERSION 2
/* (Decide if these can ever be validly changed.) */
#define OBJC_ENCODE_INLINE_DEFS 0
#define OBJC_ENCODE_DONT_INLINE_DEFS 1
/*** Private Interface (procedures) ***/
/* Used by compile_file. */
static void init_objc PARAMS ((void));
static void finish_objc PARAMS ((void));
/* Code generation. */
static void synth_module_prologue PARAMS ((void));
static tree build_constructor PARAMS ((tree, tree));
static rtx build_module_descriptor PARAMS ((void));
static tree init_module_descriptor PARAMS ((tree));
static tree build_objc_method_call PARAMS ((int, tree, tree,
tree, tree, tree));
static void generate_strings PARAMS ((void));
static tree get_proto_encoding PARAMS ((tree));
static void build_selector_translation_table PARAMS ((void));
static tree objc_add_static_instance PARAMS ((tree, tree));
static tree build_ivar_template PARAMS ((void));
static tree build_method_template PARAMS ((void));
static tree build_private_template PARAMS ((tree));
static void build_class_template PARAMS ((void));
static void build_selector_template PARAMS ((void));
static void build_category_template PARAMS ((void));
static tree build_super_template PARAMS ((void));
static tree build_category_initializer PARAMS ((tree, tree, tree,
tree, tree, tree));
static tree build_protocol_initializer PARAMS ((tree, tree, tree,
tree, tree));
static void synth_forward_declarations PARAMS ((void));
static void generate_ivar_lists PARAMS ((void));
static void generate_dispatch_tables PARAMS ((void));
static void generate_shared_structures PARAMS ((void));
static tree generate_protocol_list PARAMS ((tree));
static void generate_forward_declaration_to_string_table PARAMS ((void));
static void build_protocol_reference PARAMS ((tree));
static tree build_keyword_selector PARAMS ((tree));
static tree synth_id_with_class_suffix PARAMS ((const char *, tree));
static void generate_static_references PARAMS ((void));
static int check_methods_accessible PARAMS ((tree, tree,
int));
static void encode_aggregate_within PARAMS ((tree, int, int,
int, int));
static const char *objc_demangle PARAMS ((const char *));
static void objc_expand_function_end PARAMS ((void));
/* Hash tables to manage the global pool of method prototypes. */
hash *nst_method_hash_list = 0;
hash *cls_method_hash_list = 0;
static size_t hash_func PARAMS ((tree));
static void hash_init PARAMS ((void));
static void hash_enter PARAMS ((hash *, tree));
static hash hash_lookup PARAMS ((hash *, tree));
static void hash_add_attr PARAMS ((hash, tree));
static tree lookup_method PARAMS ((tree, tree));
static tree lookup_instance_method_static PARAMS ((tree, tree));
static tree lookup_class_method_static PARAMS ((tree, tree));
static tree add_class PARAMS ((tree));
static void add_category PARAMS ((tree, tree));
enum string_section
{
class_names, /* class, category, protocol, module names */
meth_var_names, /* method and variable names */
meth_var_types /* method and variable type descriptors */
};
static tree add_objc_string PARAMS ((tree,
enum string_section));
static tree get_objc_string_decl PARAMS ((tree,
enum string_section));
static tree build_objc_string_decl PARAMS ((enum string_section));
static tree build_selector_reference_decl PARAMS ((void));
/* Protocol additions. */
static tree add_protocol PARAMS ((tree));
static tree lookup_protocol PARAMS ((tree));
static void check_protocol_recursively PARAMS ((tree, tree));
static tree lookup_and_install_protocols PARAMS ((tree));
/* Type encoding. */
static void encode_type_qualifiers PARAMS ((tree));
static void encode_pointer PARAMS ((tree, int, int));
static void encode_array PARAMS ((tree, int, int));
static void encode_aggregate PARAMS ((tree, int, int));
static void encode_bitfield PARAMS ((int));
static void encode_type PARAMS ((tree, int, int));
static void encode_field_decl PARAMS ((tree, int, int));
static void really_start_method PARAMS ((tree, tree));
static int comp_method_with_proto PARAMS ((tree, tree));
static int comp_proto_with_proto PARAMS ((tree, tree));
static tree get_arg_type_list PARAMS ((tree, int, int));
static tree expr_last PARAMS ((tree));
/* Utilities for debugging and error diagnostics. */
static void warn_with_method PARAMS ((const char *, int, tree));
static void error_with_ivar PARAMS ((const char *, tree, tree));
static char *gen_method_decl PARAMS ((tree, char *));
static char *gen_declaration PARAMS ((tree, char *));
static void gen_declaration_1 PARAMS ((tree, char *));
static char *gen_declarator PARAMS ((tree, char *,
const char *));
static int is_complex_decl PARAMS ((tree));
static void adorn_decl PARAMS ((tree, char *));
static void dump_interface PARAMS ((FILE *, tree));
/* Everything else. */
static tree define_decl PARAMS ((tree, tree));
static tree lookup_method_in_protocol_list PARAMS ((tree, tree, int));
static tree lookup_protocol_in_reflist PARAMS ((tree, tree));
static tree create_builtin_decl PARAMS ((enum tree_code,
tree, const char *));
static void setup_string_decl PARAMS ((void));
static void build_string_class_template PARAMS ((void));
static tree my_build_string PARAMS ((int, const char *));
static void build_objc_symtab_template PARAMS ((void));
static tree init_def_list PARAMS ((tree));
static tree init_objc_symtab PARAMS ((tree));
static void forward_declare_categories PARAMS ((void));
static void generate_objc_symtab_decl PARAMS ((void));
static tree build_selector PARAMS ((tree));
static tree build_typed_selector_reference PARAMS ((tree, tree));
static tree build_selector_reference PARAMS ((tree));
static tree build_class_reference_decl PARAMS ((void));
static void add_class_reference PARAMS ((tree));
static tree build_protocol_template PARAMS ((void));
static tree build_descriptor_table_initializer PARAMS ((tree, tree));
static tree build_method_prototype_list_template PARAMS ((tree, int));
static tree build_method_prototype_template PARAMS ((void));
static int forwarding_offset PARAMS ((tree));
static tree encode_method_prototype PARAMS ((tree, tree));
static tree generate_descriptor_table PARAMS ((tree, const char *,
int, tree, tree));
static void generate_method_descriptors PARAMS ((tree));
static tree build_tmp_function_decl PARAMS ((void));
static void hack_method_prototype PARAMS ((tree, tree));
static void generate_protocol_references PARAMS ((tree));
static void generate_protocols PARAMS ((void));
static void check_ivars PARAMS ((tree, tree));
static tree build_ivar_list_template PARAMS ((tree, int));
static tree build_method_list_template PARAMS ((tree, int));
static tree build_ivar_list_initializer PARAMS ((tree, tree));
static tree generate_ivars_list PARAMS ((tree, const char *,
int, tree));
static tree build_dispatch_table_initializer PARAMS ((tree, tree));
static tree generate_dispatch_table PARAMS ((tree, const char *,
int, tree));
static tree build_shared_structure_initializer PARAMS ((tree, tree, tree, tree,
tree, int, tree, tree,
tree));
static void generate_category PARAMS ((tree));
static int is_objc_type_qualifier PARAMS ((tree));
static tree adjust_type_for_id_default PARAMS ((tree));
static tree check_duplicates PARAMS ((hash));
static tree receiver_is_class_object PARAMS ((tree));
static int check_methods PARAMS ((tree, tree, int));
static int conforms_to_protocol PARAMS ((tree, tree));
static void check_protocol PARAMS ((tree, const char *,
const char *));
static void check_protocols PARAMS ((tree, const char *,
const char *));
static tree encode_method_def PARAMS ((tree));
static void gen_declspecs PARAMS ((tree, char *, int));
static void generate_classref_translation_entry PARAMS ((tree));
static void handle_class_ref PARAMS ((tree));
static void generate_struct_by_value_array PARAMS ((void))
ATTRIBUTE_NORETURN;
static void encode_complete_bitfield PARAMS ((int, tree, int));
/*** Private Interface (data) ***/
/* Reserved tag definitions. */
#define TYPE_ID "id"
#define TAG_OBJECT "objc_object"
#define TAG_CLASS "objc_class"
#define TAG_SUPER "objc_super"
#define TAG_SELECTOR "objc_selector"
#define UTAG_CLASS "_objc_class"
#define UTAG_IVAR "_objc_ivar"
#define UTAG_IVAR_LIST "_objc_ivar_list"
#define UTAG_METHOD "_objc_method"
#define UTAG_METHOD_LIST "_objc_method_list"
#define UTAG_CATEGORY "_objc_category"
#define UTAG_MODULE "_objc_module"
#define UTAG_SYMTAB "_objc_symtab"
#define UTAG_SUPER "_objc_super"
#define UTAG_SELECTOR "_objc_selector"
#define UTAG_PROTOCOL "_objc_protocol"
#define UTAG_METHOD_PROTOTYPE "_objc_method_prototype"
#define UTAG_METHOD_PROTOTYPE_LIST "_objc__method_prototype_list"
/* Note that the string object global name is only needed for the
NeXT runtime. */
#define STRING_OBJECT_GLOBAL_NAME "_NSConstantStringClassReference"
#define PROTOCOL_OBJECT_CLASS_NAME "Protocol"
static const char *TAG_GETCLASS;
static const char *TAG_GETMETACLASS;
static const char *TAG_MSGSEND;
static const char *TAG_MSGSENDSUPER;
static const char *TAG_EXECCLASS;
static const char *default_constant_string_class_name;
/* The OCTI_... enumeration itself is in objc/objc-act.h. */
tree objc_global_trees[OCTI_MAX];
static void handle_impent PARAMS ((struct imp_entry *));
struct imp_entry *imp_list = 0;
int imp_count = 0; /* `@implementation' */
int cat_count = 0; /* `@category' */
static int method_slot = 0; /* Used by start_method_def, */
#define BUFSIZE 1024
static char *errbuf; /* Buffer for error diagnostics */
/* Data imported from tree.c. */
extern enum debug_info_type write_symbols;
/* Data imported from toplev.c. */
extern const char *dump_base_name;
static int flag_typed_selectors;
FILE *gen_declaration_file;
/* Tells "encode_pointer/encode_aggregate" whether we are generating
type descriptors for instance variables (as opposed to methods).
Type descriptors for instance variables contain more information
than methods (for static typing and embedded structures). */
static int generating_instance_variables = 0;
/* Some platforms pass small structures through registers versus
through an invisible pointer. Determine at what size structure is
the transition point between the two possibilities. */
static void
generate_struct_by_value_array ()
{
tree type;
tree field_decl, field_decl_chain;
int i, j;
int aggregate_in_mem[32];
int found = 0;
/* Presumably no platform passes 32 byte structures in a register. */
for (i = 1; i < 32; i++)
{
char buffer[5];
/* Create an unnamed struct that has `i' character components */
type = start_struct (RECORD_TYPE, NULL_TREE);
strcpy (buffer, "c1");
field_decl = create_builtin_decl (FIELD_DECL,
char_type_node,
buffer);
field_decl_chain = field_decl;
for (j = 1; j < i; j++)
{
sprintf (buffer, "c%d", j + 1);
field_decl = create_builtin_decl (FIELD_DECL,
char_type_node,
buffer);
chainon (field_decl_chain, field_decl);
}
finish_struct (type, field_decl_chain, NULL_TREE);
aggregate_in_mem[i] = aggregate_value_p (type);
if (!aggregate_in_mem[i])
found = 1;
}
/* We found some structures that are returned in registers instead of memory
so output the necessary data. */
if (found)
{
for (i = 31; i >= 0; i--)
if (!aggregate_in_mem[i])
break;
printf ("#define OBJC_MAX_STRUCT_BY_VALUE %d\n\n", i);
/* The first member of the structure is always 0 because we don't handle
structures with 0 members */
printf ("static int struct_forward_array[] = {\n 0");
for (j = 1; j <= i; j++)
printf (", %d", aggregate_in_mem[j]);
printf ("\n};\n");
}
exit (0);
}
const char *
objc_init (filename)
const char *filename;
{
filename = c_objc_common_init (filename);
if (filename == NULL)
return filename;
/* Force the line number back to 0; check_newline will have
raised it to 1, which will make the builtin functions appear
not to be built in. */
lineno = 0;
/* If gen_declaration desired, open the output file. */
if (flag_gen_declaration)
{
register char * const dumpname = concat (dump_base_name, ".decl", NULL);
gen_declaration_file = fopen (dumpname, "w");
if (gen_declaration_file == 0)
fatal_io_error ("can't open %s", dumpname);
free (dumpname);
}
if (flag_next_runtime)
{
TAG_GETCLASS = "objc_getClass";
TAG_GETMETACLASS = "objc_getMetaClass";
TAG_MSGSEND = "objc_msgSend";
TAG_MSGSENDSUPER = "objc_msgSendSuper";
TAG_EXECCLASS = "__objc_execClass";
default_constant_string_class_name = "NSConstantString";
}
else
{
TAG_GETCLASS = "objc_get_class";
TAG_GETMETACLASS = "objc_get_meta_class";
TAG_MSGSEND = "objc_msg_lookup";
TAG_MSGSENDSUPER = "objc_msg_lookup_super";
TAG_EXECCLASS = "__objc_exec_class";
default_constant_string_class_name = "NXConstantString";
flag_typed_selectors = 1;
}
objc_ellipsis_node = make_node (ERROR_MARK);
init_objc ();
if (print_struct_values)
generate_struct_by_value_array ();
return filename;
}
void
finish_file ()
{
c_objc_common_finish_file ();
/* Finalize Objective-C runtime data. No need to generate tables
and code if only checking syntax. */
if (!flag_syntax_only)
finish_objc ();
if (gen_declaration_file)
fclose (gen_declaration_file);
}
static tree
define_decl (declarator, declspecs)
tree declarator;
tree declspecs;
{
tree decl = start_decl (declarator, declspecs, 0, NULL_TREE);
finish_decl (decl, NULL_TREE, NULL_TREE);
return decl;
}
/* Return 1 if LHS and RHS are compatible types for assignment or
various other operations. Return 0 if they are incompatible, and
return -1 if we choose to not decide. When the operation is
REFLEXIVE, check for compatibility in either direction.
For statically typed objects, an assignment of the form `a' = `b'
is permitted if:
`a' is of type "id",
`a' and `b' are the same class type, or
`a' and `b' are of class types A and B such that B is a descendant of A. */
static tree
lookup_method_in_protocol_list (rproto_list, sel_name, class_meth)
tree rproto_list;
tree sel_name;
int class_meth;
{
tree rproto, p;
tree fnd = 0;
for (rproto = rproto_list; rproto; rproto = TREE_CHAIN (rproto))
{
p = TREE_VALUE (rproto);
if (TREE_CODE (p) == PROTOCOL_INTERFACE_TYPE)
{
if ((fnd = lookup_method (class_meth
? PROTOCOL_CLS_METHODS (p)
: PROTOCOL_NST_METHODS (p), sel_name)))
;
else if (PROTOCOL_LIST (p))
fnd = lookup_method_in_protocol_list (PROTOCOL_LIST (p),
sel_name, class_meth);
}
else
{
; /* An identifier...if we could not find a protocol. */
}
if (fnd)
return fnd;
}
return 0;
}
static tree
lookup_protocol_in_reflist (rproto_list, lproto)
tree rproto_list;
tree lproto;
{
tree rproto, p;
/* Make sure the protocol is supported by the object on the rhs. */
if (TREE_CODE (lproto) == PROTOCOL_INTERFACE_TYPE)
{
tree fnd = 0;
for (rproto = rproto_list; rproto; rproto = TREE_CHAIN (rproto))
{
p = TREE_VALUE (rproto);
if (TREE_CODE (p) == PROTOCOL_INTERFACE_TYPE)
{
if (lproto == p)
fnd = lproto;
else if (PROTOCOL_LIST (p))
fnd = lookup_protocol_in_reflist (PROTOCOL_LIST (p), lproto);
}
if (fnd)
return fnd;
}
}
else
{
; /* An identifier...if we could not find a protocol. */
}
return 0;
}
/* Return 1 if LHS and RHS are compatible types for assignment or
various other operations. Return 0 if they are incompatible, and
return -1 if we choose to not decide (because the types are really
just C types, not ObjC specific ones). When the operation is
REFLEXIVE (typically comparisons), check for compatibility in
either direction; when it's not (typically assignments), don't.
This function is called in two cases: when both lhs and rhs are
pointers to records (in which case we check protocols too), and
when both lhs and rhs are records (in which case we check class
inheritance only).
Warnings about classes/protocols not implementing a protocol are
emitted here (multiple of those warnings might be emitted for a
single line!); generic warnings about incompatible assignments and
lacks of casts in comparisons are/must be emitted by the caller if
we return 0.
*/
int
objc_comptypes (lhs, rhs, reflexive)
tree lhs;
tree rhs;
int reflexive;
{
/* New clause for protocols. */
/* Here we manage the case of a POINTER_TYPE = POINTER_TYPE. We only
manage the ObjC ones, and leave the rest to the C code. */
if (TREE_CODE (lhs) == POINTER_TYPE
&& TREE_CODE (TREE_TYPE (lhs)) == RECORD_TYPE
&& TREE_CODE (rhs) == POINTER_TYPE
&& TREE_CODE (TREE_TYPE (rhs)) == RECORD_TYPE)
{
int lhs_is_proto = IS_PROTOCOL_QUALIFIED_ID (lhs);
int rhs_is_proto = IS_PROTOCOL_QUALIFIED_ID (rhs);
if (lhs_is_proto)
{
tree lproto, lproto_list = TYPE_PROTOCOL_LIST (lhs);
tree rproto, rproto_list;
tree p;
/* <Protocol> = <Protocol> */
if (rhs_is_proto)
{
rproto_list = TYPE_PROTOCOL_LIST (rhs);
if (!reflexive)
{
/* An assignment between objects of type 'id
<Protocol>'; make sure the protocol on the lhs is
supported by the object on the rhs. */
for (lproto = lproto_list; lproto;
lproto = TREE_CHAIN (lproto))
{
p = TREE_VALUE (lproto);
rproto = lookup_protocol_in_reflist (rproto_list, p);
if (!rproto)
warning
("object does not conform to the `%s' protocol",
IDENTIFIER_POINTER (PROTOCOL_NAME (p)));
}
return 1;
}
else
{
/* Obscure case - a comparison between two objects
of type 'id <Protocol>'. Check that either the
protocol on the lhs is supported by the object on
the rhs, or viceversa. */
/* Check if the protocol on the lhs is supported by the
object on the rhs. */
for (lproto = lproto_list; lproto;
lproto = TREE_CHAIN (lproto))
{
p = TREE_VALUE (lproto);
rproto = lookup_protocol_in_reflist (rproto_list, p);
if (!rproto)
{
/* Check failed - check if the protocol on the rhs
is supported by the object on the lhs. */
for (rproto = rproto_list; rproto;
rproto = TREE_CHAIN (rproto))
{
p = TREE_VALUE (rproto);
lproto = lookup_protocol_in_reflist (lproto_list,
p);
if (!lproto)
{
/* This check failed too: incompatible */
return 0;
}
}
return 1;
}
}
return 1;
}
}
/* <Protocol> = <class> * */
else if (TYPED_OBJECT (TREE_TYPE (rhs)))
{
tree rname = TYPE_NAME (TREE_TYPE (rhs));
tree rinter;
/* Make sure the protocol is supported by the object on
the rhs. */
for (lproto = lproto_list; lproto; lproto = TREE_CHAIN (lproto))
{
p = TREE_VALUE (lproto);
rproto = 0;
rinter = lookup_interface (rname);
while (rinter && !rproto)
{
tree cat;
rproto_list = CLASS_PROTOCOL_LIST (rinter);
rproto = lookup_protocol_in_reflist (rproto_list, p);
/* If the underlying ObjC class does not have
the protocol we're looking for, check for "one-off"
protocols (e.g., `NSObject<MyProt> *foo;') attached
to the rhs. */
if (!rproto)
{
rproto_list = TYPE_PROTOCOL_LIST (TREE_TYPE (rhs));
rproto = lookup_protocol_in_reflist (rproto_list, p);
}
/* Check for protocols adopted by categories. */
cat = CLASS_CATEGORY_LIST (rinter);
while (cat && !rproto)
{
rproto_list = CLASS_PROTOCOL_LIST (cat);
rproto = lookup_protocol_in_reflist (rproto_list, p);
cat = CLASS_CATEGORY_LIST (cat);
}
rinter = lookup_interface (CLASS_SUPER_NAME (rinter));
}
if (!rproto)
warning ("class `%s' does not implement the `%s' protocol",
IDENTIFIER_POINTER (TYPE_NAME (TREE_TYPE (rhs))),
IDENTIFIER_POINTER (PROTOCOL_NAME (p)));
}
return 1;
}
/* <Protocol> = id */
else if (TYPE_NAME (TREE_TYPE (rhs)) == objc_object_id)
{
return 1;
}
/* <Protocol> = Class */
else if (TYPE_NAME (TREE_TYPE (rhs)) == objc_class_id)
{
return 0;
}
/* <Protocol> = ?? : let comptypes decide. */
return -1;
}
else if (rhs_is_proto)
{
/* <class> * = <Protocol> */
if (TYPED_OBJECT (TREE_TYPE (lhs)))
{
if (reflexive)
{
tree rname = TYPE_NAME (TREE_TYPE (lhs));
tree rinter;
tree rproto, rproto_list = TYPE_PROTOCOL_LIST (rhs);
/* Make sure the protocol is supported by the object on
the lhs. */
for (rproto = rproto_list; rproto;
rproto = TREE_CHAIN (rproto))
{
tree p = TREE_VALUE (rproto);
tree lproto = 0;
rinter = lookup_interface (rname);
while (rinter && !lproto)
{
tree cat;
tree lproto_list = CLASS_PROTOCOL_LIST (rinter);
lproto = lookup_protocol_in_reflist (lproto_list, p);
/* If the underlying ObjC class does not
have the protocol we're looking for,
check for "one-off" protocols (e.g.,
`NSObject<MyProt> *foo;') attached to the
lhs. */
if (!lproto)
{
lproto_list = TYPE_PROTOCOL_LIST
(TREE_TYPE (lhs));
lproto = lookup_protocol_in_reflist
(lproto_list, p);
}
/* Check for protocols adopted by categories. */
cat = CLASS_CATEGORY_LIST (rinter);
while (cat && !lproto)
{
lproto_list = CLASS_PROTOCOL_LIST (cat);
lproto = lookup_protocol_in_reflist (lproto_list,
p);
cat = CLASS_CATEGORY_LIST (cat);
}
rinter = lookup_interface (CLASS_SUPER_NAME
(rinter));
}
if (!lproto)
warning ("class `%s' does not implement the `%s' protocol",
IDENTIFIER_POINTER (TYPE_NAME
(TREE_TYPE (lhs))),
IDENTIFIER_POINTER (PROTOCOL_NAME (p)));
}
return 1;
}
else
return 0;
}
/* id = <Protocol> */
else if (TYPE_NAME (TREE_TYPE (lhs)) == objc_object_id)
{
return 1;
}
/* Class = <Protocol> */
else if (TYPE_NAME (TREE_TYPE (lhs)) == objc_class_id)
{
return 0;
}
/* ??? = <Protocol> : let comptypes decide */
else
{
return -1;
}
}
else
{
/* Attention: we shouldn't defer to comptypes here. One bad
side effect would be that we might loose the REFLEXIVE
information.
*/
lhs = TREE_TYPE (lhs);
rhs = TREE_TYPE (rhs);
}
}
if (TREE_CODE (lhs) != RECORD_TYPE || TREE_CODE (rhs) != RECORD_TYPE)
{
/* Nothing to do with ObjC - let immediately comptypes take
responsibility for checking. */
return -1;
}
/* `id' = `<class> *' `<class> *' = `id': always allow it.
Please note that
'Object *o = [[Object alloc] init]; falls
in the case <class> * = `id'.
*/
if ((TYPE_NAME (lhs) == objc_object_id && TYPED_OBJECT (rhs))
|| (TYPE_NAME (rhs) == objc_object_id && TYPED_OBJECT (lhs)))
return 1;
/* `id' = `Class', `Class' = `id' */
else if ((TYPE_NAME (lhs) == objc_object_id
&& TYPE_NAME (rhs) == objc_class_id)
|| (TYPE_NAME (lhs) == objc_class_id
&& TYPE_NAME (rhs) == objc_object_id))
return 1;
/* `<class> *' = `<class> *' */
else if (TYPED_OBJECT (lhs) && TYPED_OBJECT (rhs))
{
tree lname = TYPE_NAME (lhs);
tree rname = TYPE_NAME (rhs);
tree inter;
if (lname == rname)
return 1;
/* If the left hand side is a super class of the right hand side,
allow it. */
for (inter = lookup_interface (rname); inter;
inter = lookup_interface (CLASS_SUPER_NAME (inter)))
if (lname == CLASS_SUPER_NAME (inter))
return 1;
/* Allow the reverse when reflexive. */
if (reflexive)
for (inter = lookup_interface (lname); inter;
inter = lookup_interface (CLASS_SUPER_NAME (inter)))
if (rname == CLASS_SUPER_NAME (inter))
return 1;
return 0;
}
else
/* Not an ObjC type - let comptypes do the check. */
return -1;
}
/* Called from c-decl.c before all calls to rest_of_decl_compilation. */
void
objc_check_decl (decl)
tree decl;
{
tree type = TREE_TYPE (decl);
if (TREE_CODE (type) == RECORD_TYPE
&& TREE_STATIC_TEMPLATE (type)
&& type != constant_string_type)
error_with_decl (decl, "`%s' cannot be statically allocated");
}
/* Implement static typing. At this point, we know we have an interface. */
tree
get_static_reference (interface, protocols)
tree interface;
tree protocols;
{
tree type = xref_tag (RECORD_TYPE, interface);
if (protocols)
{
tree t, m = TYPE_MAIN_VARIANT (type);
t = copy_node (type);
/* Add this type to the chain of variants of TYPE. */
TYPE_NEXT_VARIANT (t) = TYPE_NEXT_VARIANT (m);
TYPE_NEXT_VARIANT (m) = t;
/* Look up protocols and install in lang specific list. Note
that the protocol list can have a different lifetime than T! */
TYPE_PROTOCOL_LIST (t) = lookup_and_install_protocols (protocols);
/* This forces a new pointer type to be created later
(in build_pointer_type)...so that the new template
we just created will actually be used...what a hack! */
if (TYPE_POINTER_TO (t))
TYPE_POINTER_TO (t) = NULL_TREE;
type = t;
}
return type;
}
tree
get_object_reference (protocols)
tree protocols;
{
tree type_decl = lookup_name (objc_id_id);
tree type;
if (type_decl && TREE_CODE (type_decl) == TYPE_DECL)
{
type = TREE_TYPE (type_decl);
if (TYPE_MAIN_VARIANT (type) != id_type)
warning ("unexpected type for `id' (%s)",
gen_declaration (type, errbuf));
}
else
{
error ("undefined type `id', please import <objc/objc.h>");
return error_mark_node;
}
/* This clause creates a new pointer type that is qualified with
the protocol specification...this info is used later to do more
elaborate type checking. */
if (protocols)
{
tree t, m = TYPE_MAIN_VARIANT (type);
t = copy_node (type);
/* Add this type to the chain of variants of TYPE. */
TYPE_NEXT_VARIANT (t) = TYPE_NEXT_VARIANT (m);
TYPE_NEXT_VARIANT (m) = t;
/* Look up protocols...and install in lang specific list */
TYPE_PROTOCOL_LIST (t) = lookup_and_install_protocols (protocols);
/* This forces a new pointer type to be created later
(in build_pointer_type)...so that the new template
we just created will actually be used...what a hack! */
if (TYPE_POINTER_TO (t))
TYPE_POINTER_TO (t) = NULL_TREE;
type = t;
}
return type;
}
/* Check for circular dependencies in protocols. The arguments are
PROTO, the protocol to check, and LIST, a list of protocol it
conforms to. */
static void
check_protocol_recursively (proto, list)
tree proto;
tree list;
{
tree p;
for (p = list; p; p = TREE_CHAIN (p))
{
tree pp = TREE_VALUE (p);
if (TREE_CODE (pp) == IDENTIFIER_NODE)
pp = lookup_protocol (pp);
if (pp == proto)
fatal_error ("protocol `%s' has circular dependency",
IDENTIFIER_POINTER (PROTOCOL_NAME (pp)));
if (pp)
check_protocol_recursively (proto, PROTOCOL_LIST (pp));
}
}
static tree
lookup_and_install_protocols (protocols)
tree protocols;
{
tree proto;
tree prev = NULL;
tree return_value = protocols;
for (proto = protocols; proto; proto = TREE_CHAIN (proto))
{
tree ident = TREE_VALUE (proto);
tree p = lookup_protocol (ident);
if (!p)
{
error ("cannot find protocol declaration for `%s'",
IDENTIFIER_POINTER (ident));
if (prev)
TREE_CHAIN (prev) = TREE_CHAIN (proto);
else
return_value = TREE_CHAIN (proto);
}
else
{
/* Replace identifier with actual protocol node. */
TREE_VALUE (proto) = p;
prev = proto;
}
}
return return_value;
}
/* Create and push a decl for a built-in external variable or field NAME.
CODE says which.
TYPE is its data type. */
static tree
create_builtin_decl (code, type, name)
enum tree_code code;
tree type;
const char *name;
{
tree decl = build_decl (code, get_identifier (name), type);
if (code == VAR_DECL)
{
TREE_STATIC (decl) = 1;
make_decl_rtl (decl, 0);
pushdecl (decl);
}
DECL_ARTIFICIAL (decl) = 1;
return decl;
}
/* Find the decl for the constant string class. */
static void
setup_string_decl ()
{
if (!string_class_decl)
{
if (!constant_string_global_id)
constant_string_global_id = get_identifier (STRING_OBJECT_GLOBAL_NAME);
string_class_decl = lookup_name (constant_string_global_id);
}
}
/* Purpose: "play" parser, creating/installing representations
of the declarations that are required by Objective-C.
Model:
type_spec--------->sc_spec
(tree_list) (tree_list)
| |
| |
identifier_node identifier_node */
static void
synth_module_prologue ()
{
tree temp_type;
tree super_p;
/* Defined in `objc.h' */
objc_object_id = get_identifier (TAG_OBJECT);
objc_object_reference = xref_tag (RECORD_TYPE, objc_object_id);
id_type = build_pointer_type (objc_object_reference);
objc_id_id = get_identifier (TYPE_ID);
objc_class_id = get_identifier (TAG_CLASS);
objc_class_type = build_pointer_type (xref_tag (RECORD_TYPE, objc_class_id));
protocol_type = build_pointer_type (xref_tag (RECORD_TYPE,
get_identifier (PROTOCOL_OBJECT_CLASS_NAME)));
/* Declare type of selector-objects that represent an operation name. */
/* `struct objc_selector *' */
selector_type
= build_pointer_type (xref_tag (RECORD_TYPE,
get_identifier (TAG_SELECTOR)));
/* Forward declare type, or else the prototype for msgSendSuper will
complain. */
super_p = build_pointer_type (xref_tag (RECORD_TYPE,
get_identifier (TAG_SUPER)));
/* id objc_msgSend (id, SEL, ...); */
temp_type
= build_function_type (id_type,
tree_cons (NULL_TREE, id_type,
tree_cons (NULL_TREE, selector_type,
NULL_TREE)));
if (! flag_next_runtime)
{
umsg_decl = build_decl (FUNCTION_DECL,
get_identifier (TAG_MSGSEND), temp_type);
DECL_EXTERNAL (umsg_decl) = 1;
TREE_PUBLIC (umsg_decl) = 1;
DECL_INLINE (umsg_decl) = 1;
DECL_ARTIFICIAL (umsg_decl) = 1;
make_decl_rtl (umsg_decl, NULL);
pushdecl (umsg_decl);
}
else
umsg_decl = builtin_function (TAG_MSGSEND, temp_type, 0, NOT_BUILT_IN,
NULL, NULL_TREE);
/* id objc_msgSendSuper (struct objc_super *, SEL, ...); */
temp_type
= build_function_type (id_type,
tree_cons (NULL_TREE, super_p,
tree_cons (NULL_TREE, selector_type,
NULL_TREE)));
umsg_super_decl = builtin_function (TAG_MSGSENDSUPER,
temp_type, 0, NOT_BUILT_IN,
NULL, NULL_TREE);
/* id objc_getClass (const char *); */
temp_type = build_function_type (id_type,
tree_cons (NULL_TREE,
const_string_type_node,
tree_cons (NULL_TREE, void_type_node,
NULL_TREE)));
objc_get_class_decl
= builtin_function (TAG_GETCLASS, temp_type, 0, NOT_BUILT_IN,
NULL, NULL_TREE);
/* id objc_getMetaClass (const char *); */
objc_get_meta_class_decl
= builtin_function (TAG_GETMETACLASS, temp_type, 0, NOT_BUILT_IN,
NULL, NULL_TREE);
/* static SEL _OBJC_SELECTOR_TABLE[]; */
if (! flag_next_runtime)
{
if (flag_typed_selectors)
{
/* Suppress outputting debug symbols, because
dbxout_init hasn'r been called yet. */
enum debug_info_type save_write_symbols = write_symbols;
const struct gcc_debug_hooks *const save_hooks = debug_hooks;
write_symbols = NO_DEBUG;
debug_hooks = &do_nothing_debug_hooks;
build_selector_template ();
temp_type = build_array_type (objc_selector_template, NULL_TREE);
write_symbols = save_write_symbols;
debug_hooks = save_hooks;
}
else
temp_type = build_array_type (selector_type, NULL_TREE);
layout_type (temp_type);
UOBJC_SELECTOR_TABLE_decl
= create_builtin_decl (VAR_DECL, temp_type,
"_OBJC_SELECTOR_TABLE");
/* Avoid warning when not sending messages. */
TREE_USED (UOBJC_SELECTOR_TABLE_decl) = 1;
}
generate_forward_declaration_to_string_table ();
/* Forward declare constant_string_id and constant_string_type. */
if (!constant_string_class_name)
constant_string_class_name = default_constant_string_class_name;
constant_string_id = get_identifier (constant_string_class_name);
constant_string_type = xref_tag (RECORD_TYPE, constant_string_id);
}
/* Predefine the following data type:
struct STRING_OBJECT_CLASS_NAME
{
Object isa;
char *cString;
unsigned int length;
}; */
static void
build_string_class_template ()
{
tree field_decl, field_decl_chain;
field_decl = create_builtin_decl (FIELD_DECL, id_type, "isa");
field_decl_chain = field_decl;
field_decl = create_builtin_decl (FIELD_DECL,
build_pointer_type (char_type_node),
"cString");
chainon (field_decl_chain, field_decl);
field_decl = create_builtin_decl (FIELD_DECL, unsigned_type_node, "length");
chainon (field_decl_chain, field_decl);
finish_struct (constant_string_type, field_decl_chain, NULL_TREE);
}
/* Custom build_string which sets TREE_TYPE! */
static tree
my_build_string (len, str)
int len;
const char *str;
{
return fix_string_type (build_string (len, str));
}
/* Given a chain of STRING_CST's, build a static instance of
NXConstantString which points at the concatenation of those strings.
We place the string object in the __string_objects section of the
__OBJC segment. The Objective-C runtime will initialize the isa
pointers of the string objects to point at the NXConstantString
class object. */
tree
build_objc_string_object (strings)
tree strings;
{
tree string, initlist, constructor;
int length;
if (lookup_interface (constant_string_id) == NULL_TREE)
{
error ("cannot find interface declaration for `%s'",
IDENTIFIER_POINTER (constant_string_id));
return error_mark_node;
}
add_class_reference (constant_string_id);
if (TREE_CHAIN (strings))
{
varray_type vstrings;
VARRAY_TREE_INIT (vstrings, 32, "strings");
for (; strings ; strings = TREE_CHAIN (strings))
VARRAY_PUSH_TREE (vstrings, strings);
string = combine_strings (vstrings);
}
else
string = strings;
string = fix_string_type (string);
TREE_SET_CODE (string, STRING_CST);
length = TREE_STRING_LENGTH (string) - 1;
/* We could not properly create NXConstantString in synth_module_prologue,
because that's called before debugging is initialized. Do it now. */
if (TYPE_FIELDS (constant_string_type) == NULL_TREE)
build_string_class_template ();
/* & ((NXConstantString) { NULL, string, length }) */
if (flag_next_runtime)
{
/* For the NeXT runtime, we can generate a literal reference
to the string class, don't need to run a constructor. */
setup_string_decl ();
if (string_class_decl == NULL_TREE)
{
error ("cannot find reference tag for class `%s'",
IDENTIFIER_POINTER (constant_string_id));
return error_mark_node;
}
initlist = build_tree_list
(NULL_TREE,
copy_node (build_unary_op (ADDR_EXPR, string_class_decl, 0)));
}
else
{
initlist = build_tree_list (NULL_TREE, build_int_2 (0, 0));
}
initlist
= tree_cons (NULL_TREE, copy_node (build_unary_op (ADDR_EXPR, string, 1)),
initlist);
initlist = tree_cons (NULL_TREE, build_int_2 (length, 0), initlist);
constructor = build_constructor (constant_string_type, nreverse (initlist));
if (!flag_next_runtime)
{
constructor
= objc_add_static_instance (constructor, constant_string_type);
}
return (build_unary_op (ADDR_EXPR, constructor, 1));
}
/* Declare a static instance of CLASS_DECL initialized by CONSTRUCTOR. */
static tree
objc_add_static_instance (constructor, class_decl)
tree constructor, class_decl;
{
static int num_static_inst;
tree *chain, decl;
char buf[256];
/* 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 (TYPE_NAME (class_decl), class_names);
}
sprintf (buf, "_OBJC_INSTANCE_%d", num_static_inst++);
decl = build_decl (VAR_DECL, get_identifier (buf), class_decl);
DECL_COMMON (decl) = 1;
TREE_STATIC (decl) = 1;
DECL_ARTIFICIAL (decl) = 1;
DECL_INITIAL (decl) = constructor;
/* We may be writing something else just now.
Postpone till end of input. */
DECL_DEFER_OUTPUT (decl) = 1;
pushdecl_top_level (decl);
rest_of_decl_compilation (decl, 0, 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;
}
/* Build a static constant CONSTRUCTOR
with type TYPE and elements ELTS. */
static tree
build_constructor (type, elts)
tree type, elts;
{
tree constructor, f, e;
/* ??? Most of the places that we build constructors, we don't fill in
the type of integers properly. Convert them all en masse. */
if (TREE_CODE (type) == ARRAY_TYPE)
{
f = TREE_TYPE (type);
if (TREE_CODE (f) == POINTER_TYPE || TREE_CODE (f) == INTEGER_TYPE)
for (e = elts; e ; e = TREE_CHAIN (e))
TREE_VALUE (e) = convert (f, TREE_VALUE (e));
}
else
{
f = TYPE_FIELDS (type);
for (e = elts; e && f; e = TREE_CHAIN (e), f = TREE_CHAIN (f))
if (TREE_CODE (TREE_TYPE (f)) == POINTER_TYPE
|| TREE_CODE (TREE_TYPE (f)) == INTEGER_TYPE)
TREE_VALUE (e) = convert (TREE_TYPE (f), TREE_VALUE (e));
}
constructor = build (CONSTRUCTOR, type, NULL_TREE, elts);
TREE_CONSTANT (constructor) = 1;
TREE_STATIC (constructor) = 1;
TREE_READONLY (constructor) = 1;
return constructor;
}
/* 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 ()
{
tree field_decl, field_decl_chain, index;
objc_symtab_template
= start_struct (RECORD_TYPE, get_identifier (UTAG_SYMTAB));
/* long sel_ref_cnt; */
field_decl = create_builtin_decl (FIELD_DECL,
long_integer_type_node,
"sel_ref_cnt");
field_decl_chain = field_decl;
/* SEL *refs; */
field_decl = create_builtin_decl (FIELD_DECL,
build_pointer_type (selector_type),
"refs");
chainon (field_decl_chain, field_decl);
/* short cls_def_cnt; */
field_decl = create_builtin_decl (FIELD_DECL,
short_integer_type_node,
"cls_def_cnt");
chainon (field_decl_chain, field_decl);
/* short cat_def_cnt; */
field_decl = create_builtin_decl (FIELD_DECL,
short_integer_type_node,
"cat_def_cnt");
chainon (field_decl_chain, field_decl);
/* void *defs[cls_def_cnt + cat_def_cnt]; */
if (!flag_next_runtime)
index = build_index_type (build_int_2 (imp_count + cat_count, 0));
else
index = build_index_type (build_int_2 (imp_count + cat_count - 1,
imp_count == 0 && cat_count == 0
? -1 : 0));
field_decl = create_builtin_decl (FIELD_DECL,
build_array_type (ptr_type_node, index),
"defs");
chainon (field_decl_chain, field_decl);
finish_struct (objc_symtab_template, field_decl_chain, NULL_TREE);
}
/* Create the initial value for the `defs' field of _objc_symtab.
This is a CONSTRUCTOR. */
static tree
init_def_list (type)
tree type;
{
tree expr, initlist = NULL_TREE;
struct imp_entry *impent;
if (imp_count)
for (impent = imp_list; impent; impent = impent->next)
{
if (TREE_CODE (impent->imp_context) == CLASS_IMPLEMENTATION_TYPE)
{
expr = build_unary_op (ADDR_EXPR, impent->class_decl, 0);
initlist = tree_cons (NULL_TREE, expr, initlist);
}
}
if (cat_count)
for (impent = imp_list; impent; impent = impent->next)
{
if (TREE_CODE (impent->imp_context) == CATEGORY_IMPLEMENTATION_TYPE)
{
expr = build_unary_op (ADDR_EXPR, impent->class_decl, 0);
initlist = tree_cons (NULL_TREE, expr, initlist);
}
}
if (!flag_next_runtime)
{
/* statics = { ..., _OBJC_STATIC_INSTANCES, ... } */
tree expr;
if (static_instances_decl)
expr = build_unary_op (ADDR_EXPR, static_instances_decl, 0);
else
expr = build_int_2 (0, 0);
initlist = tree_cons (NULL_TREE, expr, initlist);
}
return build_constructor (type, nreverse (initlist));
}
/* Construct the initial value for all of _objc_symtab. */
static tree
init_objc_symtab (type)
tree type;
{
tree initlist;
/* sel_ref_cnt = { ..., 5, ... } */
initlist = build_tree_list (NULL_TREE, build_int_2 (0, 0));
/* refs = { ..., _OBJC_SELECTOR_TABLE, ... } */
if (flag_next_runtime || ! sel_ref_chain)
initlist = tree_cons (NULL_TREE, build_int_2 (0, 0), initlist);
else
initlist = tree_cons (NULL_TREE,
build_unary_op (ADDR_EXPR,
UOBJC_SELECTOR_TABLE_decl, 1),
initlist);
/* cls_def_cnt = { ..., 5, ... } */
initlist = tree_cons (NULL_TREE, build_int_2 (imp_count, 0), initlist);
/* cat_def_cnt = { ..., 5, ... } */
initlist = tree_cons (NULL_TREE, build_int_2 (cat_count, 0), initlist);
/* cls_def = { ..., { &Foo, &Bar, ...}, ... } */
if (imp_count || cat_count || static_instances_decl)
{
tree field = TYPE_FIELDS (type);
field = TREE_CHAIN (TREE_CHAIN (TREE_CHAIN (TREE_CHAIN (field))));
initlist = tree_cons (NULL_TREE, init_def_list (TREE_TYPE (field)),
initlist);
}
return build_constructor (type, nreverse (initlist));
}
/* Push forward-declarations of all the categories so that
init_def_list can use them in a CONSTRUCTOR. */
static void
forward_declare_categories ()
{
struct imp_entry *impent;
tree sav = objc_implementation_context;
for (impent = imp_list; impent; impent = impent->next)
{
if (TREE_CODE (impent->imp_context) == CATEGORY_IMPLEMENTATION_TYPE)
{
/* Set an invisible arg to synth_id_with_class_suffix. */
objc_implementation_context = impent->imp_context;
impent->class_decl
= create_builtin_decl (VAR_DECL, objc_category_template,
IDENTIFIER_POINTER (synth_id_with_class_suffix ("_OBJC_CATEGORY", objc_implementation_context)));
}
}
objc_implementation_context = sav;
}
/* Create the declaration of _OBJC_SYMBOLS, with type `strict _objc_symtab'
and initialized appropriately. */
static void
generate_objc_symtab_decl ()
{
tree sc_spec;
if (!objc_category_template)
build_category_template ();
/* forward declare categories */
if (cat_count)
forward_declare_categories ();
if (!objc_symtab_template)
build_objc_symtab_template ();
sc_spec = build_tree_list (NULL_TREE, ridpointers[(int) RID_STATIC]);
UOBJC_SYMBOLS_decl = start_decl (get_identifier ("_OBJC_SYMBOLS"),
tree_cons (NULL_TREE,
objc_symtab_template, sc_spec),
1,
NULL_TREE);
TREE_USED (UOBJC_SYMBOLS_decl) = 1;
DECL_IGNORED_P (UOBJC_SYMBOLS_decl) = 1;
DECL_ARTIFICIAL (UOBJC_SYMBOLS_decl) = 1;
finish_decl (UOBJC_SYMBOLS_decl,
init_objc_symtab (TREE_TYPE (UOBJC_SYMBOLS_decl)),
NULL_TREE);
}
static tree
init_module_descriptor (type)
tree type;
{
tree initlist, expr;
/* version = { 1, ... } */
expr = build_int_2 (OBJC_VERSION, 0);
initlist = build_tree_list (NULL_TREE, expr);
/* size = { ..., sizeof (struct objc_module), ... } */
expr = size_in_bytes (objc_module_template);
initlist = tree_cons (NULL_TREE, expr, initlist);
/* name = { ..., "foo.m", ... } */
expr = add_objc_string (get_identifier (input_filename), class_names);
initlist = tree_cons (NULL_TREE, expr, initlist);
/* symtab = { ..., _OBJC_SYMBOLS, ... } */
if (UOBJC_SYMBOLS_decl)
expr = build_unary_op (ADDR_EXPR, UOBJC_SYMBOLS_decl, 0);
else
expr = build_int_2 (0, 0);
initlist = tree_cons (NULL_TREE, expr, initlist);
return build_constructor (type, nreverse (initlist));
}
/* Write out the data structures to describe Objective C classes defined.
If appropriate, compile and output a setup function to initialize them.
Return a symbol_ref to the function to call to initialize the Objective C
data structures for this file (and perhaps for other files also).
struct objc_module { ... } _OBJC_MODULE = { ... }; */
static rtx
build_module_descriptor ()
{
tree decl_specs, field_decl, field_decl_chain;
objc_module_template
= start_struct (RECORD_TYPE, get_identifier (UTAG_MODULE));
/* Long version; */
decl_specs = build_tree_list (NULL_TREE, ridpointers[(int) RID_LONG]);
field_decl = get_identifier ("version");
field_decl
= grokfield (input_filename, lineno, field_decl, decl_specs, NULL_TREE);
field_decl_chain = field_decl;
/* long size; */
decl_specs = build_tree_list (NULL_TREE, ridpointers[(int) RID_LONG]);
field_decl = get_identifier ("size");
field_decl
= grokfield (input_filename, lineno, field_decl, decl_specs, NULL_TREE);
chainon (field_decl_chain, field_decl);
/* char *name; */
decl_specs = build_tree_list (NULL_TREE, ridpointers[(int) RID_CHAR]);
field_decl = build1 (INDIRECT_REF, NULL_TREE, get_identifier ("name"));
field_decl
= grokfield (input_filename, lineno, field_decl, decl_specs, NULL_TREE);
chainon (field_decl_chain, field_decl);
/* struct objc_symtab *symtab; */
decl_specs = get_identifier (UTAG_SYMTAB);
decl_specs = build_tree_list (NULL_TREE, xref_tag (RECORD_TYPE, decl_specs));
field_decl = build1 (INDIRECT_REF, NULL_TREE, get_identifier ("symtab"));
field_decl
= grokfield (input_filename, lineno, field_decl, decl_specs, NULL_TREE);
chainon (field_decl_chain, field_decl);
finish_struct (objc_module_template, field_decl_chain, NULL_TREE);
/* Create an instance of "objc_module". */
decl_specs = tree_cons (NULL_TREE, objc_module_template,
build_tree_list (NULL_TREE,
ridpointers[(int) RID_STATIC]));
UOBJC_MODULES_decl = start_decl (get_identifier ("_OBJC_MODULES"),
decl_specs, 1, NULL_TREE);
DECL_ARTIFICIAL (UOBJC_MODULES_decl) = 1;
DECL_IGNORED_P (UOBJC_MODULES_decl) = 1;
DECL_CONTEXT (UOBJC_MODULES_decl) = NULL_TREE;
finish_decl (UOBJC_MODULES_decl,
init_module_descriptor (TREE_TYPE (UOBJC_MODULES_decl)),
NULL_TREE);
/* Mark the decl to avoid "defined but not used" warning. */
DECL_IN_SYSTEM_HEADER (UOBJC_MODULES_decl) = 1;
/* Generate a constructor call for the module descriptor.
This code was generated by reading the grammar rules
of c-parse.in; Therefore, it may not be the most efficient
way of generating the requisite code. */
if (flag_next_runtime)
return NULL_RTX;
{
tree parms, execclass_decl, decelerator, void_list_node_1;
tree init_function_name, init_function_decl;
/* Declare void __objc_execClass (void *); */
void_list_node_1 = build_tree_list (NULL_TREE, void_type_node);
execclass_decl = build_decl (FUNCTION_DECL,
get_identifier (TAG_EXECCLASS),
build_function_type (void_type_node,
tree_cons (NULL_TREE, ptr_type_node,
void_list_node_1)));
DECL_EXTERNAL (execclass_decl) = 1;
DECL_ARTIFICIAL (execclass_decl) = 1;
TREE_PUBLIC (execclass_decl) = 1;
pushdecl (execclass_decl);
rest_of_decl_compilation (execclass_decl, 0, 0, 0);
assemble_external (execclass_decl);
/* void _GLOBAL_$I$<gnyf> () {objc_execClass (&L_OBJC_MODULES);} */
init_function_name = get_file_function_name ('I');
start_function (void_list_node_1,
build_nt (CALL_EXPR, init_function_name,
tree_cons (NULL_TREE, NULL_TREE,
void_list_node_1),
NULL_TREE),
NULL_TREE);
store_parm_decls ();
init_function_decl = current_function_decl;
TREE_PUBLIC (init_function_decl) = ! targetm.have_ctors_dtors;
TREE_USED (init_function_decl) = 1;
/* Don't let this one be deferred. */
DECL_INLINE (init_function_decl) = 0;
DECL_UNINLINABLE (init_function_decl) = 1;
current_function_cannot_inline
= "static constructors and destructors cannot be inlined";
parms
= build_tree_list (NULL_TREE,
build_unary_op (ADDR_EXPR, UOBJC_MODULES_decl, 0));
decelerator = build_function_call (execclass_decl, parms);
c_expand_expr_stmt (decelerator);
finish_function (0, 0);
return XEXP (DECL_RTL (init_function_decl), 0);
}
}
/* extern const char _OBJC_STRINGS[]; */
static void
generate_forward_declaration_to_string_table ()
{
tree sc_spec, decl_specs, expr_decl;
sc_spec = tree_cons (NULL_TREE, ridpointers[(int) RID_EXTERN], NULL_TREE);
decl_specs = tree_cons (NULL_TREE, ridpointers[(int) RID_CHAR], sc_spec);
expr_decl
= build_nt (ARRAY_REF, get_identifier ("_OBJC_STRINGS"), NULL_TREE);
UOBJC_STRINGS_decl = define_decl (expr_decl, decl_specs);
}
/* Return the DECL of the string IDENT in the SECTION. */
static tree
get_objc_string_decl (ident, section)
tree ident;
enum string_section section;
{
tree chain;
if (section == class_names)
chain = class_names_chain;
else if (section == meth_var_names)
chain = meth_var_names_chain;
else if (section == meth_var_types)
chain = meth_var_types_chain;
else
abort ();
for (; chain != 0; chain = TREE_CHAIN (chain))
if (TREE_VALUE (chain) == ident)
return (TREE_PURPOSE (chain));
abort ();
return NULL_TREE;
}
/* Output references to all statically allocated objects. Return the DECL
for the array built. */
static void
generate_static_references ()
{
tree decls = NULL_TREE, ident, decl_spec, expr_decl, expr = NULL_TREE;
tree class_name, class, decl, initlist;
tree cl_chain, in_chain, type;
int num_inst, num_class;
char buf[256];
if (flag_next_runtime)
abort ();
for (cl_chain = objc_static_instances, num_class = 0;
cl_chain; cl_chain = TREE_CHAIN (cl_chain), num_class++)
{
for (num_inst = 0, in_chain = TREE_PURPOSE (cl_chain);
in_chain; num_inst++, in_chain = TREE_CHAIN (in_chain));
sprintf (buf, "_OBJC_STATIC_INSTANCES_%d", num_class);
ident = get_identifier (buf);
expr_decl = build_nt (ARRAY_REF, ident, NULL_TREE);
decl_spec = tree_cons (NULL_TREE, build_pointer_type (void_type_node),
build_tree_list (NULL_TREE,
ridpointers[(int) RID_STATIC]));
decl = start_decl (expr_decl, decl_spec, 1, NULL_TREE);
DECL_CONTEXT (decl) = 0;
DECL_ARTIFICIAL (decl) = 1;
/* Output {class_name, ...}. */
class = TREE_VALUE (cl_chain);
class_name = get_objc_string_decl (TYPE_NAME (class), class_names);
initlist = build_tree_list (NULL_TREE,
build_unary_op (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 (ADDR_EXPR, TREE_VALUE (in_chain), 1);
initlist = tree_cons (NULL_TREE, expr, initlist);
}
/* Output {..., NULL}. */
initlist = tree_cons (NULL_TREE, build_int_2 (0, 0), initlist);
expr = build_constructor (TREE_TYPE (decl), nreverse (initlist));
finish_decl (decl, expr, NULL_TREE);
TREE_USED (decl) = 1;
type = build_array_type (build_pointer_type (void_type_node), 0);
decl = build_decl (VAR_DECL, ident, type);
TREE_USED (decl) = 1;
TREE_STATIC (decl) = 1;
decls
= tree_cons (NULL_TREE, build_unary_op (ADDR_EXPR, decl, 1), decls);
}
decls = tree_cons (NULL_TREE, build_int_2 (0, 0), decls);
ident = get_identifier ("_OBJC_STATIC_INSTANCES");
expr_decl = build_nt (ARRAY_REF, ident, NULL_TREE);
decl_spec = tree_cons (NULL_TREE, build_pointer_type (void_type_node),
build_tree_list (NULL_TREE,
ridpointers[(int) RID_STATIC]));
static_instances_decl
= start_decl (expr_decl, decl_spec, 1, NULL_TREE);
TREE_USED (static_instances_decl) = 1;
DECL_CONTEXT (static_instances_decl) = 0;
DECL_ARTIFICIAL (static_instances_decl) = 1;
expr = build_constructor (TREE_TYPE (static_instances_decl),
nreverse (decls));
finish_decl (static_instances_decl, expr, NULL_TREE);
}
/* Output all strings. */
static void
generate_strings ()
{
tree sc_spec, decl_specs, expr_decl;
tree chain, string_expr;
tree string, decl;
for (chain = class_names_chain; chain; chain = TREE_CHAIN (chain))
{
string = TREE_VALUE (chain);
decl = TREE_PURPOSE (chain);
sc_spec
= tree_cons (NULL_TREE, ridpointers[(int) RID_STATIC], NULL_TREE);
decl_specs = tree_cons (NULL_TREE, ridpointers[(int) RID_CHAR], sc_spec);
expr_decl = build_nt (ARRAY_REF, DECL_NAME (decl), NULL_TREE);
decl = start_decl (expr_decl, decl_specs, 1, NULL_TREE);
DECL_CONTEXT (decl) = NULL_TREE;
string_expr = my_build_string (IDENTIFIER_LENGTH (string) + 1,
IDENTIFIER_POINTER (string));
finish_decl (decl, string_expr, NULL_TREE);
}
for (chain = meth_var_names_chain; chain; chain = TREE_CHAIN (chain))
{
string = TREE_VALUE (chain);
decl = TREE_PURPOSE (chain);
sc_spec
= tree_cons (NULL_TREE, ridpointers[(int) RID_STATIC], NULL_TREE);
decl_specs = tree_cons (NULL_TREE, ridpointers[(int) RID_CHAR], sc_spec);
expr_decl = build_nt (ARRAY_REF, DECL_NAME (decl), NULL_TREE);
decl = start_decl (expr_decl, decl_specs, 1, NULL_TREE);
DECL_CONTEXT (decl) = NULL_TREE;
string_expr = my_build_string (IDENTIFIER_LENGTH (string) + 1,
IDENTIFIER_POINTER (string));
finish_decl (decl, string_expr, NULL_TREE);
}
for (chain = meth_var_types_chain; chain; chain = TREE_CHAIN (chain))
{
string = TREE_VALUE (chain);
decl = TREE_PURPOSE (chain);
sc_spec
= tree_cons (NULL_TREE, ridpointers[(int) RID_STATIC], NULL_TREE);
decl_specs = tree_cons (NULL_TREE, ridpointers[(int) RID_CHAR], sc_spec);
expr_decl = build_nt (ARRAY_REF, DECL_NAME (decl), NULL_TREE);
decl = start_decl (expr_decl, decl_specs, 1, NULL_TREE);
DECL_CONTEXT (decl) = NULL_TREE;
string_expr = my_build_string (IDENTIFIER_LENGTH (string) + 1,
IDENTIFIER_POINTER (string));
finish_decl (decl, string_expr, NULL_TREE);
}
}
static tree
build_selector_reference_decl ()
{
tree decl, ident;
char buf[256];
static int idx = 0;
sprintf (buf, "_OBJC_SELECTOR_REFERENCES_%d", idx++);
ident = get_identifier (buf);
decl = build_decl (VAR_DECL, ident, selector_type);
DECL_EXTERNAL (decl) = 1;
TREE_PUBLIC (decl) = 1;
TREE_USED (decl) = 1;
TREE_READONLY (decl) = 1;
DECL_ARTIFICIAL (decl) = 1;
DECL_CONTEXT (decl) = 0;
make_decl_rtl (decl, 0);
pushdecl_top_level (decl);
return decl;
}
/* Just a handy wrapper for add_objc_string. */
static tree
build_selector (ident)
tree ident;
{
tree expr = add_objc_string (ident, meth_var_names);
if (flag_typed_selectors)
return expr;
else
return build_c_cast (selector_type, expr); /* cast! */
}
static void
build_selector_translation_table ()
{
tree sc_spec, decl_specs;
tree chain, initlist = NULL_TREE;
int offset = 0;
tree decl = NULL_TREE, var_decl, name;
for (chain = sel_ref_chain; chain; chain = TREE_CHAIN (chain))
{
tree expr;
if (warn_selector && objc_implementation_context)
{
tree method_chain;
bool found = false;
for (method_chain = meth_var_names_chain;
method_chain;
method_chain = TREE_CHAIN (method_chain))
{
if (TREE_VALUE (method_chain) == TREE_VALUE (chain))
{
found = true;
break;
}
}
if (!found)
{
/* Adjust line number for warning message. */
int save_lineno = lineno;
if (flag_next_runtime && TREE_PURPOSE (chain))
lineno = DECL_SOURCE_LINE (TREE_PURPOSE (chain));
warning ("creating selector for non existant method %s",
IDENTIFIER_POINTER (TREE_VALUE (chain)));
lineno = save_lineno;
}
}
expr = build_selector (TREE_VALUE (chain));
if (flag_next_runtime)
{
name = DECL_NAME (TREE_PURPOSE (chain));
sc_spec = build_tree_list (NULL_TREE, ridpointers[(int) RID_STATIC]);
/* static SEL _OBJC_SELECTOR_REFERENCES_n = ...; */
decl_specs = tree_cons (NULL_TREE, selector_type, sc_spec);
var_decl = name;
/* The `decl' that is returned from start_decl is the one that we
forward declared in `build_selector_reference' */
decl = start_decl (var_decl, decl_specs, 1, NULL_TREE );
}
/* add one for the '\0' character */
offset += IDENTIFIER_LENGTH (TREE_VALUE (chain)) + 1;
if (flag_next_runtime)
finish_decl (decl, expr, NULL_TREE);
else
{
if (flag_typed_selectors)
{
tree eltlist = NULL_TREE;
tree encoding = get_proto_encoding (TREE_PURPOSE (chain));
eltlist = tree_cons (NULL_TREE, expr, NULL_TREE);
eltlist = tree_cons (NULL_TREE, encoding, eltlist);
expr = build_constructor (objc_selector_template,
nreverse (eltlist));
}
initlist = tree_cons (NULL_TREE, expr, initlist);
}
}
if (! flag_next_runtime)
{
/* Cause the variable and its initial value to be actually output. */
DECL_EXTERNAL (UOBJC_SELECTOR_TABLE_decl) = 0;
TREE_STATIC (UOBJC_SELECTOR_TABLE_decl) = 1;
/* NULL terminate the list and fix the decl for output. */
initlist = tree_cons (NULL_TREE, build_int_2 (0, 0), initlist);
DECL_INITIAL (UOBJC_SELECTOR_TABLE_decl) = objc_ellipsis_node;
initlist = build_constructor (TREE_TYPE (UOBJC_SELECTOR_TABLE_decl),
nreverse (initlist));
finish_decl (UOBJC_SELECTOR_TABLE_decl, initlist, NULL_TREE);
current_function_decl = NULL_TREE;
}
}
static tree
get_proto_encoding (proto)
tree proto;
{
tree encoding;
if (proto)
{
tree tmp_decl;
if (! METHOD_ENCODING (proto))
{
tmp_decl = build_tmp_function_decl ();
hack_method_prototype (proto, tmp_decl);
encoding = encode_method_prototype (proto, tmp_decl);
METHOD_ENCODING (proto) = encoding;
}
else
encoding = METHOD_ENCODING (proto);
return add_objc_string (encoding, meth_var_types);
}
else
return build_int_2 (0, 0);
}
/* sel_ref_chain is a list whose "value" fields will be instances of
identifier_node that represent the selector. */
static tree
build_typed_selector_reference (ident, prototype)
tree ident, prototype;
{
tree *chain = &sel_ref_chain;
tree expr;
int index = 0;
while (*chain)
{
if (TREE_PURPOSE (*chain) == prototype && TREE_VALUE (*chain) == ident)
goto return_at_index;
index++;
chain = &TREE_CHAIN (*chain);
}
*chain = tree_cons (prototype, ident, NULL_TREE);
return_at_index:
expr = build_unary_op (ADDR_EXPR,
build_array_ref (UOBJC_SELECTOR_TABLE_decl,
build_int_2 (index, 0)),
1);
return build_c_cast (selector_type, expr);
}
static tree
build_selector_reference (ident)
tree ident;
{
tree *chain = &sel_ref_chain;
tree expr;
int index = 0;
while (*chain)
{
if (TREE_VALUE (*chain) == ident)
return (flag_next_runtime
? TREE_PURPOSE (*chain)
: build_array_ref (UOBJC_SELECTOR_TABLE_decl,
build_int_2 (index, 0)));
index++;
chain = &TREE_CHAIN (*chain);
}
expr = build_selector_reference_decl ();
*chain = tree_cons (expr, ident, NULL_TREE);
return (flag_next_runtime
? expr
: build_array_ref (UOBJC_SELECTOR_TABLE_decl,
build_int_2 (index, 0)));
}
static tree
build_class_reference_decl ()
{
tree decl, ident;
char buf[256];
static int idx = 0;
sprintf (buf, "_OBJC_CLASS_REFERENCES_%d", idx++);
ident = get_identifier (buf);
decl = build_decl (VAR_DECL, ident, objc_class_type);
DECL_EXTERNAL (decl) = 1;
TREE_PUBLIC (decl) = 1;
TREE_USED (decl) = 1;
TREE_READONLY (decl) = 1;
DECL_CONTEXT (decl) = 0;
DECL_ARTIFICIAL (decl) = 1;
make_decl_rtl (decl, 0);
pushdecl_top_level (decl);
return decl;
}
/* Create a class reference, but don't create a variable to reference
it. */
static void
add_class_reference (ident)
tree ident;
{
tree chain;
if ((chain = cls_ref_chain))
{
tree tail;
do
{
if (ident == TREE_VALUE (chain))
return;
tail = chain;
chain = TREE_CHAIN (chain);
}
while (chain);
/* Append to the end of the list */
TREE_CHAIN (tail) = tree_cons (NULL_TREE, ident, NULL_TREE);
}
else
cls_ref_chain = tree_cons (NULL_TREE, ident, NULL_TREE);
}
/* Get a class reference, creating it if necessary. Also create the
reference variable. */
tree
get_class_reference (ident)
tree ident;
{
if (flag_next_runtime)
{
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 (IDENTIFIER_LENGTH (ident) + 1,
IDENTIFIER_POINTER (ident)));
assemble_external (objc_get_class_decl);
return build_function_call (objc_get_class_decl, params);
}
}
/* For each string section we have a chain which maps identifier nodes
to decls for the strings. */
static tree
add_objc_string (ident, section)
tree ident;
enum string_section section;
{
tree *chain, decl;
if (section == class_names)
chain = &class_names_chain;
else if (section == meth_var_names)
chain = &meth_var_names_chain;
else if (section == meth_var_types)
chain = &meth_var_types_chain;
else
abort ();
while (*chain)
{
if (TREE_VALUE (*chain) == ident)
return build_unary_op (ADDR_EXPR, TREE_PURPOSE (*chain), 1);
chain = &TREE_CHAIN (*chain);
}
decl = build_objc_string_decl (section);
*chain = tree_cons (decl, ident, NULL_TREE);
return build_unary_op (ADDR_EXPR, decl, 1);
}
static tree
build_objc_string_decl (section)
enum string_section section;
{
tree decl, ident;
char buf[256];
static int class_names_idx = 0;
static int meth_var_names_idx = 0;
static int meth_var_types_idx = 0;
if (section == class_names)
sprintf (buf, "_OBJC_CLASS_NAME_%d", class_names_idx++);
else if (section == meth_var_names)
sprintf (buf, "_OBJC_METH_VAR_NAME_%d", meth_var_names_idx++);
else if (section == meth_var_types)
sprintf (buf, "_OBJC_METH_VAR_TYPE_%d", meth_var_types_idx++);
ident = get_identifier (buf);
decl = build_decl (VAR_DECL, ident, build_array_type (char_type_node, 0));
DECL_EXTERNAL (decl) = 1;
TREE_PUBLIC (decl) = 1;
TREE_USED (decl) = 1;
TREE_READONLY (decl) = 1;
TREE_CONSTANT (decl) = 1;
DECL_CONTEXT (decl) = 0;
DECL_ARTIFICIAL (decl) = 1;
make_decl_rtl (decl, 0);
pushdecl_top_level (decl);
return decl;
}
void
objc_declare_alias (alias_ident, class_ident)
tree alias_ident;
tree class_ident;
{
if (is_class_name (class_ident) != class_ident)
warning ("cannot find class `%s'", IDENTIFIER_POINTER (class_ident));
else if (is_class_name (alias_ident))
warning ("class `%s' already exists", IDENTIFIER_POINTER (alias_ident));
else
alias_chain = tree_cons (class_ident, alias_ident, alias_chain);
}
void
objc_declare_class (ident_list)
tree ident_list;
{
tree list;
for (list = ident_list; list; list = TREE_CHAIN (list))
{
tree ident = TREE_VALUE (list);
tree decl;
if ((decl = lookup_name (ident)))
{
error ("`%s' redeclared as different kind of symbol",
IDENTIFIER_POINTER (ident));
error_with_decl (decl, "previous declaration of `%s'");
}
if (! is_class_name (ident))
{
tree record = xref_tag (RECORD_TYPE, ident);
TREE_STATIC_TEMPLATE (record) = 1;
class_chain = tree_cons (NULL_TREE, ident, class_chain);
}
}
}
tree
is_class_name (ident)
tree ident;
{
tree chain;
if (lookup_interface (ident))
return ident;
for (chain = class_chain; chain; chain = TREE_CHAIN (chain))
{
if (ident == TREE_VALUE (chain))
return ident;
}
for (chain = alias_chain; chain; chain = TREE_CHAIN (chain))
{
if (ident == TREE_VALUE (chain))
return TREE_PURPOSE (chain);
}
return 0;
}
tree
objc_is_id (ident)
tree ident;
{
/* NB: This function may be called before the ObjC front-end
has been initialized, in which case ID_TYPE will be NULL. */
return (id_type && ident && TYPE_P (ident) && IS_ID (ident))
? id_type
: NULL_TREE;
}
tree
lookup_interface (ident)
tree ident;
{
tree chain;
for (chain = interface_chain; chain; chain = TREE_CHAIN (chain))
{
if (ident == CLASS_NAME (chain))
return chain;
}
return NULL_TREE;
}
/* Used by: build_private_template, continue_class,
and for @defs constructs. */
tree
get_class_ivars (interface)
tree interface;
{
tree my_name, super_name, ivar_chain;
my_name = CLASS_NAME (interface);
super_name = CLASS_SUPER_NAME (interface);
ivar_chain = CLASS_IVARS (interface);
/* Save off a pristine copy of the leaf ivars (i.e, those not
inherited from a super class). */
if (!CLASS_OWN_IVARS (interface))
CLASS_OWN_IVARS (interface) = copy_list (ivar_chain);
while (super_name)
{
tree op1;
tree super_interface = lookup_interface (super_name);
if (!super_interface)
{
/* fatal did not work with 2 args...should fix */
error ("cannot find interface declaration for `%s', superclass of `%s'",
IDENTIFIER_POINTER (super_name),
IDENTIFIER_POINTER (my_name));
exit (FATAL_EXIT_CODE);
}
if (super_interface == interface)
fatal_error ("circular inheritance in interface declaration for `%s'",
IDENTIFIER_POINTER (super_name));
interface = super_interface;
my_name = CLASS_NAME (interface);
super_name = CLASS_SUPER_NAME (interface);
op1 = CLASS_OWN_IVARS (interface);
if (op1)
{
tree head = copy_list (op1);
/* Prepend super class ivars...make a copy of the list, we
do not want to alter the original. */
chainon (head, ivar_chain);
ivar_chain = head;
}
}
return ivar_chain;
}
/* struct <classname> {
struct objc_class *isa;
...
}; */
static tree
build_private_template (class)
tree class;
{
tree ivar_context;
if (CLASS_STATIC_TEMPLATE (class))
{
uprivate_record = CLASS_STATIC_TEMPLATE (class);
ivar_context = TYPE_FIELDS (CLASS_STATIC_TEMPLATE (class));
}
else
{
uprivate_record = start_struct (RECORD_TYPE, CLASS_NAME (class));
ivar_context = get_class_ivars (class);
finish_struct (uprivate_record, ivar_context, NULL_TREE);
CLASS_STATIC_TEMPLATE (class) = uprivate_record;
/* mark this record as class template - for class type checking */
TREE_STATIC_TEMPLATE (uprivate_record) = 1;
}
instance_type
= groktypename (build_tree_list (build_tree_list (NULL_TREE,
uprivate_record),
build1 (INDIRECT_REF, NULL_TREE,
NULL_TREE)));
return ivar_context;
}
/* Begin code generation for protocols... */
/* struct objc_protocol {
char *protocol_name;
struct objc_protocol **protocol_list;
struct objc_method_desc *instance_methods;
struct objc_method_desc *class_methods;
}; */
static tree
build_protocol_template ()
{
tree decl_specs, field_decl, field_decl_chain;
tree template;
template = start_struct (RECORD_TYPE, get_identifier (UTAG_PROTOCOL));
/* struct objc_class *isa; */
decl_specs = build_tree_list (NULL_TREE, xref_tag (RECORD_TYPE,
get_identifier (UTAG_CLASS)));
field_decl = build1 (INDIRECT_REF, NULL_TREE, get_identifier ("isa"));
field_decl
= grokfield (input_filename, lineno, field_decl, decl_specs, NULL_TREE);
field_decl_chain = field_decl;
/* char *protocol_name; */
decl_specs = build_tree_list (NULL_TREE, ridpointers[(int) RID_CHAR]);
field_decl
= build1 (INDIRECT_REF, NULL_TREE, get_identifier ("protocol_name"));
field_decl
= grokfield (input_filename, lineno, field_decl, decl_specs, NULL_TREE);
chainon (field_decl_chain, field_decl);
/* struct objc_protocol **protocol_list; */
decl_specs = build_tree_list (NULL_TREE, template);
field_decl
= build1 (INDIRECT_REF, NULL_TREE, get_identifier ("protocol_list"));
field_decl = build1 (INDIRECT_REF, NULL_TREE, field_decl);
field_decl
= grokfield (input_filename, lineno, field_decl, decl_specs, NULL_TREE);
chainon (field_decl_chain, field_decl);
/* struct objc_method_list *instance_methods; */
decl_specs
= build_tree_list (NULL_TREE,
xref_tag (RECORD_TYPE,
get_identifier (UTAG_METHOD_PROTOTYPE_LIST)));
field_decl
= build1 (INDIRECT_REF, NULL_TREE, get_identifier ("instance_methods"));
field_decl
= grokfield (input_filename, lineno, field_decl, decl_specs, NULL_TREE);
chainon (field_decl_chain, field_decl);
/* struct objc_method_list *class_methods; */
decl_specs
= build_tree_list (NULL_TREE,
xref_tag (RECORD_TYPE,
get_identifier (UTAG_METHOD_PROTOTYPE_LIST)));
field_decl
= build1 (INDIRECT_REF, NULL_TREE, get_identifier ("class_methods"));
field_decl
= grokfield (input_filename, lineno, field_decl, decl_specs, NULL_TREE);
chainon (field_decl_chain, field_decl);
return finish_struct (template, field_decl_chain, NULL_TREE);
}
static tree
build_descriptor_table_initializer (type, entries)
tree type;
tree entries;
{
tree initlist = NULL_TREE;
do
{
tree eltlist = NULL_TREE;
eltlist
= tree_cons (NULL_TREE,
build_selector (METHOD_SEL_NAME (entries)), NULL_TREE);
eltlist
= tree_cons (NULL_TREE,
add_objc_string (METHOD_ENCODING (entries),
meth_var_types),
eltlist);
initlist
= tree_cons (NULL_TREE,
build_constructor (type, nreverse (eltlist)), initlist);
entries = TREE_CHAIN (entries);
}
while (entries);
return build_constructor (build_array_type (type, 0), nreverse (initlist));
}
/* struct objc_method_prototype_list {
int count;
struct objc_method_prototype {
SEL name;
char *types;
} list[1];
}; */
static tree
build_method_prototype_list_template (list_type, size)
tree list_type;
int size;
{
tree objc_ivar_list_record;
tree decl_specs, field_decl, field_decl_chain;
/* Generate an unnamed struct definition. */
objc_ivar_list_record = start_struct (RECORD_TYPE, NULL_TREE);
/* int method_count; */
decl_specs = build_tree_list (NULL_TREE, ridpointers[(int) RID_INT]);
field_decl = get_identifier ("method_count");
field_decl
= grokfield (input_filename, lineno, field_decl, decl_specs, NULL_TREE);
field_decl_chain = field_decl;
/* struct objc_method method_list[]; */
decl_specs = build_tree_list (NULL_TREE, list_type);
field_decl = build_nt (ARRAY_REF, get_identifier ("method_list"),
build_int_2 (size, 0));
field_decl
= grokfield (input_filename, lineno, field_decl, decl_specs, NULL_TREE);
chainon (field_decl_chain, field_decl);
finish_struct (objc_ivar_list_record, field_decl_chain, NULL_TREE);
return objc_ivar_list_record;
}
static tree
build_method_prototype_template ()
{
tree proto_record;
tree decl_specs, field_decl, field_decl_chain;
proto_record
= start_struct (RECORD_TYPE, get_identifier (UTAG_METHOD_PROTOTYPE));
/* struct objc_selector *_cmd; */
decl_specs = tree_cons (NULL_TREE, xref_tag (RECORD_TYPE,
get_identifier (TAG_SELECTOR)), NULL_TREE);
field_decl = build1 (INDIRECT_REF, NULL_TREE, get_identifier ("_cmd"));
field_decl
= grokfield (input_filename, lineno, field_decl, decl_specs, NULL_TREE);
field_decl_chain = field_decl;
decl_specs = tree_cons (NULL_TREE, ridpointers[(int) RID_CHAR], NULL_TREE);
field_decl
= build1 (INDIRECT_REF, NULL_TREE, get_identifier ("method_types"));
field_decl
= grokfield (input_filename, lineno, field_decl, decl_specs, NULL_TREE);
chainon (field_decl_chain, field_decl);
finish_struct (proto_record, field_decl_chain, NULL_TREE);
return proto_record;
}
/* True if last call to forwarding_offset yielded a register offset. */
static int offset_is_register;
static int
forwarding_offset (parm)
tree parm;
{
int offset_in_bytes;
if (GET_CODE (DECL_INCOMING_RTL (parm)) == MEM)
{
rtx addr = XEXP (DECL_INCOMING_RTL (parm), 0);
/* ??? Here we assume that the parm address is indexed
off the frame pointer or arg pointer.
If that is not true, we produce meaningless results,
but do not crash. */
if (GET_CODE (addr) == PLUS
&& GET_CODE (XEXP (addr, 1)) == CONST_INT)
offset_in_bytes = INTVAL (XEXP (addr, 1));
else
offset_in_bytes = 0;
offset_in_bytes += OBJC_FORWARDING_STACK_OFFSET;
offset_is_register = 0;
}
else if (GET_CODE (DECL_INCOMING_RTL (parm)) == REG)
{
int regno = REGNO (DECL_INCOMING_RTL (parm));
offset_in_bytes = apply_args_register_offset (regno);
offset_is_register = 1;
}
else
return 0;
/* This is the case where the parm is passed as an int or double
and it is converted to a char, short or float and stored back
in the parmlist. In this case, describe the parm
with the variable's declared type, and adjust the address
if the least significant bytes (which we are using) are not
the first ones. */
if (BYTES_BIG_ENDIAN && TREE_TYPE (parm) != DECL_ARG_TYPE (parm))
offset_in_bytes += (GET_MODE_SIZE (TYPE_MODE (DECL_ARG_TYPE (parm)))
- GET_MODE_SIZE (GET_MODE (DECL_RTL (parm))));
return offset_in_bytes;
}
static tree
encode_method_prototype (method_decl, func_decl)
tree method_decl;
tree func_decl;
{
tree parms;
int stack_size, i;
tree user_args;
HOST_WIDE_INT max_parm_end = 0;
char buf[40];
tree result;
/* ONEWAY and BYCOPY, for remote object are the only method qualifiers. */
encode_type_qualifiers (TREE_PURPOSE (TREE_TYPE (method_decl)));
/* C type. */
encode_type (TREE_TYPE (TREE_TYPE (func_decl)),
obstack_object_size (&util_obstack),
OBJC_ENCODE_INLINE_DEFS);
/* Stack size. */
for (parms = DECL_ARGUMENTS (func_decl); parms;
parms = TREE_CHAIN (parms))
{
HOST_WIDE_INT parm_end = (forwarding_offset (parms)
+ int_size_in_bytes (TREE_TYPE (parms)));
if (!offset_is_register && max_parm_end < parm_end)
max_parm_end = parm_end;
}
stack_size = max_parm_end - OBJC_FORWARDING_MIN_OFFSET;
sprintf (buf, "%d", stack_size);
obstack_grow (&util_obstack, buf, strlen (buf));
user_args = METHOD_SEL_ARGS (method_decl);
/* Argument types. */
for (parms = DECL_ARGUMENTS (func_decl), i = 0; parms;
parms = TREE_CHAIN (parms), i++)
{
/* Process argument qualifiers for user supplied arguments. */
if (i > 1)
{
encode_type_qualifiers (TREE_PURPOSE (TREE_TYPE (user_args)));
user_args = TREE_CHAIN (user_args);
}
/* Type. */
encode_type (TREE_TYPE (parms),
obstack_object_size (&util_obstack),
OBJC_ENCODE_INLINE_DEFS);
/* Compute offset. */
sprintf (buf, "%d", forwarding_offset (parms));
/* Indicate register. */
if (offset_is_register)
obstack_1grow (&util_obstack, '+');
obstack_grow (&util_obstack, buf, strlen (buf));
}
obstack_1grow (&util_obstack, '\0');
result = get_identifier (obstack_finish (&util_obstack));
obstack_free (&util_obstack, util_firstobj);
return result;
}
static tree
generate_descriptor_table (type, name, size, list, proto)
tree type;
const char *name;
int size;
tree list;
tree proto;
{
tree sc_spec, decl_specs, decl, initlist;
sc_spec = tree_cons (NULL_TREE, ridpointers[(int) RID_STATIC], NULL_TREE);
decl_specs = tree_cons (NULL_TREE, type, sc_spec);
decl = start_decl (synth_id_with_class_suffix (name, proto),
decl_specs, 1, NULL_TREE);
DECL_CONTEXT (decl) = NULL_TREE;
initlist = build_tree_list (NULL_TREE, build_int_2 (size, 0));
initlist = tree_cons (NULL_TREE, list, initlist);
finish_decl (decl, build_constructor (type, nreverse (initlist)),
NULL_TREE);
return decl;
}
static void
generate_method_descriptors (protocol)
tree protocol;
{
tree initlist, chain, method_list_template;
tree cast, variable_length_type;
int size;
if (!objc_method_prototype_template)
objc_method_prototype_template = build_method_prototype_template ();
cast = build_tree_list (build_tree_list (NULL_TREE, xref_tag (RECORD_TYPE,
get_identifier (UTAG_METHOD_PROTOTYPE_LIST))),
NULL_TREE);
variable_length_type = groktypename (cast);
chain = PROTOCOL_CLS_METHODS (protocol);
if (chain)
{
size = list_length (chain);
method_list_template
= build_method_prototype_list_template (objc_method_prototype_template,
size);
initlist
= build_descriptor_table_initializer (objc_method_prototype_template,
chain);
UOBJC_CLASS_METHODS_decl
= generate_descriptor_table (method_list_template,
"_OBJC_PROTOCOL_CLASS_METHODS",
size, initlist, protocol);
TREE_TYPE (UOBJC_CLASS_METHODS_decl) = variable_length_type;
}
else
UOBJC_CLASS_METHODS_decl = 0;
chain = PROTOCOL_NST_METHODS (protocol);
if (chain)
{
size = list_length (chain);
method_list_template
= build_method_prototype_list_template (objc_method_prototype_template,
size);
initlist
= build_descriptor_table_initializer (objc_method_prototype_template,
chain);
UOBJC_INSTANCE_METHODS_decl
= generate_descriptor_table (method_list_template,
"_OBJC_PROTOCOL_INSTANCE_METHODS",
size, initlist, protocol);
TREE_TYPE (UOBJC_INSTANCE_METHODS_decl) = variable_length_type;
}
else
UOBJC_INSTANCE_METHODS_decl = 0;
}
/* Generate a temporary FUNCTION_DECL node to be used in
hack_method_prototype below. */
static tree
build_tmp_function_decl ()
{
tree decl_specs, expr_decl, parms;
static int xxx = 0;
char buffer[80];
/* struct objc_object *objc_xxx (id, SEL, ...); */
pushlevel (0);
decl_specs = build_tree_list (NULL_TREE, objc_object_reference);
push_parm_decl (build_tree_list
(build_tree_list (decl_specs,
build1 (INDIRECT_REF, NULL_TREE,
NULL_TREE)),
NULL_TREE));
decl_specs = build_tree_list (NULL_TREE, xref_tag (RECORD_TYPE,
get_identifier (TAG_SELECTOR)));
expr_decl = build1 (INDIRECT_REF, NULL_TREE, NULL_TREE);
push_parm_decl (build_tree_list (build_tree_list (decl_specs, expr_decl),
NULL_TREE));
parms = get_parm_info (0);
poplevel (0, 0, 0);
decl_specs = build_tree_list (NULL_TREE, objc_object_reference);
sprintf (buffer, "__objc_tmp_%x", xxx++);
expr_decl = build_nt (CALL_EXPR, get_identifier (buffer), parms, NULL_TREE);
expr_decl = build1 (INDIRECT_REF, NULL_TREE, expr_decl);
return define_decl (expr_decl, decl_specs);
}
/* Generate the prototypes for protocol methods. This is used to
generate method encodings for these.
NST_METHODS is the method to generate a _DECL node for TMP_DECL is
a decl node to be used. This is also where the return value is
given. */
static void
hack_method_prototype (nst_methods, tmp_decl)
tree nst_methods;
tree tmp_decl;
{
tree parms;
tree parm;
/* Hack to avoid problem with static typing of self arg. */
TREE_SET_CODE (nst_methods, CLASS_METHOD_DECL);
start_method_def (nst_methods);
TREE_SET_CODE (nst_methods, INSTANCE_METHOD_DECL);
if (METHOD_ADD_ARGS (nst_methods) == objc_ellipsis_node)
parms = get_parm_info (0); /* we have a `, ...' */
else
parms = get_parm_info (1); /* place a `void_at_end' */
poplevel (0, 0, 0); /* Must be called BEFORE start_function. */
/* Usually called from store_parm_decls -> init_function_start. */
DECL_ARGUMENTS (tmp_decl) = TREE_PURPOSE (parms);
if (current_function_decl)
abort ();
current_function_decl = tmp_decl;
{
/* Code taken from start_function. */
tree restype = TREE_TYPE (TREE_TYPE (tmp_decl));
/* Promote the value to int before returning it. */
if (TREE_CODE (restype) == INTEGER_TYPE
&& TYPE_PRECISION (restype) < TYPE_PRECISION (integer_type_node))
restype = integer_type_node;
DECL_RESULT (tmp_decl) = build_decl (RESULT_DECL, 0, restype);
}
for (parm = DECL_ARGUMENTS (tmp_decl); parm; parm = TREE_CHAIN (parm))
DECL_CONTEXT (parm) = tmp_decl;
init_function_start (tmp_decl, "objc-act", 0);
/* Typically called from expand_function_start for function definitions. */
assign_parms (tmp_decl);
/* install return type */
TREE_TYPE (TREE_TYPE (tmp_decl)) = groktypename (TREE_TYPE (nst_methods));
current_function_decl = NULL;
}
static void
generate_protocol_references (plist)
tree plist;
{
tree lproto;
/* Forward declare protocols referenced. */
for (lproto = plist; lproto; lproto = TREE_CHAIN (lproto))
{
tree proto = TREE_VALUE (lproto);
if (TREE_CODE (proto) == PROTOCOL_INTERFACE_TYPE
&& PROTOCOL_NAME (proto))
{
if (! PROTOCOL_FORWARD_DECL (proto))
build_protocol_reference (proto);
if (PROTOCOL_LIST (proto))
generate_protocol_references (PROTOCOL_LIST (proto));
}
}
}
/* 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.
The GNU runtime as well 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 inizialization.
But that doesn't hurt, it's just a little inefficient. */
static void
generate_protocols ()
{
tree p, tmp_decl, encoding;
tree sc_spec, decl_specs, decl;
tree initlist, protocol_name_expr, refs_decl, refs_expr;
tree cast_type2;
tmp_decl = build_tmp_function_decl ();
if (! objc_protocol_template)
objc_protocol_template = build_protocol_template ();
/* 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. */
if (! PROTOCOL_FORWARD_DECL (p))
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))
{
hack_method_prototype (nst_methods, tmp_decl);
encoding = encode_method_prototype (nst_methods, tmp_decl);
METHOD_ENCODING (nst_methods) = encoding;
}
nst_methods = TREE_CHAIN (nst_methods);
}
while (cls_methods)
{
if (! METHOD_ENCODING (cls_methods))
{
hack_method_prototype (cls_methods, tmp_decl);
encoding = encode_method_prototype (cls_methods, tmp_decl);
METHOD_ENCODING (cls_methods) = encoding;
}
cls_methods = TREE_CHAIN (cls_methods);
}
generate_method_descriptors (p);
if (PROTOCOL_LIST (p))
refs_decl = generate_protocol_list (p);
else
refs_decl = 0;
/* static struct objc_protocol _OBJC_PROTOCOL_<mumble>; */
sc_spec = tree_cons (NULL_TREE, ridpointers[(int) RID_STATIC],
NULL_TREE);
decl_specs = tree_cons (NULL_TREE, objc_protocol_template, sc_spec);
decl = start_decl (synth_id_with_class_suffix ("_OBJC_PROTOCOL", p),
decl_specs, 1, NULL_TREE);
DECL_CONTEXT (decl) = NULL_TREE;
protocol_name_expr = add_objc_string (PROTOCOL_NAME (p), class_names);
if (refs_decl)
{
cast_type2
= groktypename
(build_tree_list (build_tree_list (NULL_TREE,
objc_protocol_template),
build1 (INDIRECT_REF, NULL_TREE,
build1 (INDIRECT_REF, NULL_TREE,
NULL_TREE))));
refs_expr = build_unary_op (ADDR_EXPR, refs_decl, 0);
TREE_TYPE (refs_expr) = cast_type2;
}
else
refs_expr = build_int_2 (0, 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_decl (decl, initlist, NULL_TREE);
/* Mark the decl as used to avoid "defined but not used" warning. */
TREE_USED (decl) = 1;
}
}
static tree
build_protocol_initializer (type, protocol_name, protocol_list,
instance_methods, class_methods)
tree type;
tree protocol_name;
tree protocol_list;
tree instance_methods;
tree class_methods;
{
tree initlist = NULL_TREE, expr;
tree cast_type;
cast_type = groktypename
(build_tree_list
(build_tree_list (NULL_TREE,
xref_tag (RECORD_TYPE,
get_identifier (UTAG_CLASS))),
build1 (INDIRECT_REF, NULL_TREE, NULL_TREE)));
/* Filling the "isa" in with one allows the runtime system to
detect that the version change...should remove before final release. */
expr = build_int_2 (PROTOCOL_VERSION, 0);
TREE_TYPE (expr) = cast_type;
initlist = tree_cons (NULL_TREE, expr, initlist);
initlist = tree_cons (NULL_TREE, protocol_name, initlist);
initlist = tree_cons (NULL_TREE, protocol_list, initlist);
if (!instance_methods)
initlist = tree_cons (NULL_TREE, build_int_2 (0, 0), initlist);
else
{
expr = build_unary_op (ADDR_EXPR, instance_methods, 0);
initlist = tree_cons (NULL_TREE, expr, initlist);
}
if (!class_methods)
initlist = tree_cons (NULL_TREE, build_int_2 (0, 0), initlist);
else
{
expr = build_unary_op (ADDR_EXPR, class_methods, 0);
initlist = tree_cons (NULL_TREE, expr, initlist);
}
return build_constructor (type, nreverse (initlist));
}
/* 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 ()
{
tree decl_specs, field_decl, field_decl_chain;
objc_category_template = start_struct (RECORD_TYPE,
get_identifier (UTAG_CATEGORY));
/* char *category_name; */
decl_specs = build_tree_list (NULL_TREE, ridpointers[(int) RID_CHAR]);
field_decl
= build1 (INDIRECT_REF, NULL_TREE, get_identifier ("category_name"));
field_decl
= grokfield (input_filename, lineno, field_decl, decl_specs, NULL_TREE);
field_decl_chain = field_decl;
/* char *class_name; */
decl_specs = build_tree_list (NULL_TREE, ridpointers[(int) RID_CHAR]);
field_decl = build1 (INDIRECT_REF, NULL_TREE, get_identifier ("class_name"));
field_decl
= grokfield (input_filename, lineno, field_decl, decl_specs, NULL_TREE);
chainon (field_decl_chain, field_decl);
/* struct objc_method_list *instance_methods; */
decl_specs = build_tree_list (NULL_TREE,
xref_tag (RECORD_TYPE,
get_identifier (UTAG_METHOD_LIST)));
field_decl
= build1 (INDIRECT_REF, NULL_TREE, get_identifier ("instance_methods"));
field_decl
= grokfield (input_filename, lineno, field_decl, decl_specs, NULL_TREE);
chainon (field_decl_chain, field_decl);
/* struct objc_method_list *class_methods; */
decl_specs = build_tree_list (NULL_TREE,
xref_tag (RECORD_TYPE,
get_identifier (UTAG_METHOD_LIST)));
field_decl
= build1 (INDIRECT_REF, NULL_TREE, get_identifier ("class_methods"));
field_decl
= grokfield (input_filename, lineno, field_decl, decl_specs, NULL_TREE);
chainon (field_decl_chain, field_decl);
/* struct objc_protocol **protocol_list; */
decl_specs = build_tree_list (NULL_TREE,
xref_tag (RECORD_TYPE,
get_identifier (UTAG_PROTOCOL)));
field_decl
= build1 (INDIRECT_REF, NULL_TREE, get_identifier ("protocol_list"));
field_decl = build1 (INDIRECT_REF, NULL_TREE, field_decl);
field_decl
= grokfield (input_filename, lineno, field_decl, decl_specs, NULL_TREE);
chainon (field_decl_chain, field_decl);
finish_struct (objc_category_template,