9519 lines
265 KiB
C
9519 lines
265 KiB
C
/* Implement classes and message passing for Objective C.
|
||
Copyright (C) 1992, 1993, 1994, 1995, 1997, 1998, 1999, 2000,
|
||
2001, 2002, 2003, 2004, 2005 Free Software Foundation, Inc.
|
||
Contributed by Steve Naroff.
|
||
|
||
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 2, 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 COPYING. If not, write to
|
||
the Free Software Foundation, 51 Franklin Street, Fifth Floor,
|
||
Boston, MA 02110-1301, 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.
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||
|
||
code generation `options':
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||
|
||
*/
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||
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#include "config.h"
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||
#include "system.h"
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#include "coretypes.h"
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||
#include "tm.h"
|
||
#include "tree.h"
|
||
#include "rtl.h"
|
||
#include "tm_p.h"
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||
#include "expr.h"
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||
|
||
#ifdef OBJCPLUS
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||
#include "cp-tree.h"
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||
#else
|
||
#include "c-tree.h"
|
||
#endif
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||
|
||
#include "c-common.h"
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||
#include "c-pragma.h"
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||
#include "flags.h"
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||
#include "langhooks.h"
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||
#include "objc-act.h"
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||
#include "input.h"
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||
#include "except.h"
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||
#include "function.h"
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||
#include "output.h"
|
||
#include "toplev.h"
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||
#include "ggc.h"
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||
#include "varray.h"
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||
#include "debug.h"
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||
#include "target.h"
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||
#include "diagnostic.h"
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||
#include "cgraph.h"
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||
#include "tree-iterator.h"
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||
#include "libfuncs.h"
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||
#include "hashtab.h"
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||
#include "langhooks-def.h"
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||
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||
#define OBJC_VOID_AT_END void_list_node
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||
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||
static unsigned int should_call_super_dealloc = 0;
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||
|
||
/* When building Objective-C++, we are not linking against the C front-end
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||
and so need to replicate the C tree-construction functions in some way. */
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#ifdef OBJCPLUS
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#define OBJCP_REMAP_FUNCTIONS
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#include "objcp-decl.h"
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#endif /* OBJCPLUS */
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||
|
||
/* This is the default way of generating a method name. */
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/* I am not sure it is really correct.
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Perhaps there's a danger that it will make name conflicts
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if method names contain underscores. -- rms. */
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#ifndef OBJC_GEN_METHOD_LABEL
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#define OBJC_GEN_METHOD_LABEL(BUF, IS_INST, CLASS_NAME, CAT_NAME, SEL_NAME, NUM) \
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||
do { \
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||
char *temp; \
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||
sprintf ((BUF), "_%s_%s_%s_%s", \
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||
((IS_INST) ? "i" : "c"), \
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||
(CLASS_NAME), \
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||
((CAT_NAME)? (CAT_NAME) : ""), \
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||
(SEL_NAME)); \
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||
for (temp = (BUF); *temp; temp++) \
|
||
if (*temp == ':') *temp = '_'; \
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||
} while (0)
|
||
#endif
|
||
|
||
/* These need specifying. */
|
||
#ifndef OBJC_FORWARDING_STACK_OFFSET
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||
#define OBJC_FORWARDING_STACK_OFFSET 0
|
||
#endif
|
||
|
||
#ifndef OBJC_FORWARDING_MIN_OFFSET
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||
#define OBJC_FORWARDING_MIN_OFFSET 0
|
||
#endif
|
||
|
||
/* Set up for use of obstacks. */
|
||
|
||
#include "obstack.h"
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||
|
||
/* This obstack is used to accumulate the encoding of a data type. */
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||
static struct obstack util_obstack;
|
||
|
||
/* This points to the beginning of obstack contents, so we can free
|
||
the whole contents. */
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||
char *util_firstobj;
|
||
|
||
/* 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 ? 6 : 8)
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||
#define PROTOCOL_VERSION 2
|
||
|
||
/* (Decide if these can ever be validly changed.) */
|
||
#define OBJC_ENCODE_INLINE_DEFS 0
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||
#define OBJC_ENCODE_DONT_INLINE_DEFS 1
|
||
|
||
/*** Private Interface (procedures) ***/
|
||
|
||
/* Used by compile_file. */
|
||
|
||
static void init_objc (void);
|
||
static void finish_objc (void);
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||
|
||
/* Code generation. */
|
||
|
||
static tree objc_build_constructor (tree, tree);
|
||
static tree build_objc_method_call (int, tree, tree, tree, tree);
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||
static tree get_proto_encoding (tree);
|
||
static tree lookup_interface (tree);
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||
static tree objc_add_static_instance (tree, tree);
|
||
|
||
static tree start_class (enum tree_code, tree, tree, tree);
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||
static tree continue_class (tree);
|
||
static void finish_class (tree);
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||
static void start_method_def (tree);
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||
#ifdef OBJCPLUS
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||
static void objc_start_function (tree, tree, tree, tree);
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||
#else
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||
static void objc_start_function (tree, tree, tree, struct c_arg_info *);
|
||
#endif
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||
static tree start_protocol (enum tree_code, tree, tree);
|
||
static tree build_method_decl (enum tree_code, tree, tree, tree, bool);
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||
static tree objc_add_method (tree, tree, int);
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||
static tree add_instance_variable (tree, int, tree);
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||
static tree build_ivar_reference (tree);
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||
static tree is_ivar (tree, tree);
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||
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||
static void build_objc_exception_stuff (void);
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||
static void build_next_objc_exception_stuff (void);
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||
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||
/* We only need the following for ObjC; ObjC++ will use C++'s definition
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||
of DERIVED_FROM_P. */
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||
#ifndef OBJCPLUS
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||
static bool objc_derived_from_p (tree, tree);
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||
#define DERIVED_FROM_P(PARENT, CHILD) objc_derived_from_p (PARENT, CHILD)
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||
#endif
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||
static void objc_xref_basetypes (tree, tree);
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||
|
||
static void build_class_template (void);
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||
static void build_selector_template (void);
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||
static void build_category_template (void);
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||
static void build_super_template (void);
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||
static tree build_protocol_initializer (tree, tree, tree, tree, tree);
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||
static tree get_class_ivars (tree, bool);
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||
static tree generate_protocol_list (tree);
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||
static void build_protocol_reference (tree);
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||
|
||
#ifdef OBJCPLUS
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||
static void objc_generate_cxx_cdtors (void);
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||
#endif
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||
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||
static const char *synth_id_with_class_suffix (const char *, tree);
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||
|
||
/* Hash tables to manage the global pool of method prototypes. */
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||
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||
hash *nst_method_hash_list = 0;
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||
hash *cls_method_hash_list = 0;
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||
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||
static hash hash_lookup (hash *, tree);
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||
static tree lookup_method (tree, tree);
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||
static tree lookup_method_static (tree, tree, int);
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||
|
||
enum string_section
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||
{
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||
class_names, /* class, category, protocol, module names */
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||
meth_var_names, /* method and variable names */
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||
meth_var_types /* method and variable type descriptors */
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||
};
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||
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||
static tree add_objc_string (tree, enum string_section);
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||
static tree build_objc_string_decl (enum string_section);
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||
static void build_selector_table_decl (void);
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||
|
||
/* Protocol additions. */
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||
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||
static tree lookup_protocol (tree);
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||
static tree lookup_and_install_protocols (tree);
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||
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||
/* Type encoding. */
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||
|
||
static void encode_type_qualifiers (tree);
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||
static void encode_type (tree, int, int);
|
||
static void encode_field_decl (tree, int, int);
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||
|
||
#ifdef OBJCPLUS
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||
static void really_start_method (tree, tree);
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||
#else
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||
static void really_start_method (tree, struct c_arg_info *);
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||
#endif
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||
static int comp_proto_with_proto (tree, tree, int);
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||
static void objc_push_parm (tree);
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||
#ifdef OBJCPLUS
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||
static tree objc_get_parm_info (int);
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||
#else
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||
static struct c_arg_info *objc_get_parm_info (int);
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||
#endif
|
||
|
||
/* Utilities for debugging and error diagnostics. */
|
||
|
||
static void warn_with_method (const char *, int, tree);
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||
static char *gen_type_name (tree);
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||
static char *gen_type_name_0 (tree);
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||
static char *gen_method_decl (tree);
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||
static char *gen_declaration (tree);
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||
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||
/* Everything else. */
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||
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||
static tree create_field_decl (tree, const char *);
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||
static void add_class_reference (tree);
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||
static void build_protocol_template (void);
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||
static tree encode_method_prototype (tree);
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||
static void generate_classref_translation_entry (tree);
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||
static void handle_class_ref (tree);
|
||
static void generate_struct_by_value_array (void)
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||
ATTRIBUTE_NORETURN;
|
||
static void mark_referenced_methods (void);
|
||
static void generate_objc_image_info (void);
|
||
|
||
/*** Private Interface (data) ***/
|
||
|
||
/* Reserved tag definitions. */
|
||
|
||
#define OBJECT_TYPEDEF_NAME "id"
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||
#define CLASS_TYPEDEF_NAME "Class"
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||
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||
#define TAG_OBJECT "objc_object"
|
||
#define TAG_CLASS "objc_class"
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||
#define TAG_SUPER "objc_super"
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||
#define TAG_SELECTOR "objc_selector"
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||
|
||
#define UTAG_CLASS "_objc_class"
|
||
#define UTAG_IVAR "_objc_ivar"
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||
#define UTAG_IVAR_LIST "_objc_ivar_list"
|
||
#define UTAG_METHOD "_objc_method"
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||
#define UTAG_METHOD_LIST "_objc_method_list"
|
||
#define UTAG_CATEGORY "_objc_category"
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||
#define UTAG_MODULE "_objc_module"
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||
#define UTAG_SYMTAB "_objc_symtab"
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||
#define UTAG_SUPER "_objc_super"
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||
#define UTAG_SELECTOR "_objc_selector"
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||
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||
#define UTAG_PROTOCOL "_objc_protocol"
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||
#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_FORMAT "_%sClassReference"
|
||
|
||
#define PROTOCOL_OBJECT_CLASS_NAME "Protocol"
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||
|
||
static const char *TAG_GETCLASS;
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||
static const char *TAG_GETMETACLASS;
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||
static const char *TAG_MSGSEND;
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||
static const char *TAG_MSGSENDSUPER;
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||
/* The NeXT Objective-C messenger may have two extra entry points, for use
|
||
when returning a structure. */
|
||
static const char *TAG_MSGSEND_STRET;
|
||
static const char *TAG_MSGSENDSUPER_STRET;
|
||
static const char *default_constant_string_class_name;
|
||
|
||
/* Runtime metadata flags. */
|
||
#define CLS_FACTORY 0x0001L
|
||
#define CLS_META 0x0002L
|
||
#define CLS_HAS_CXX_STRUCTORS 0x2000L
|
||
|
||
#define OBJC_MODIFIER_STATIC 0x00000001
|
||
#define OBJC_MODIFIER_FINAL 0x00000002
|
||
#define OBJC_MODIFIER_PUBLIC 0x00000004
|
||
#define OBJC_MODIFIER_PRIVATE 0x00000008
|
||
#define OBJC_MODIFIER_PROTECTED 0x00000010
|
||
#define OBJC_MODIFIER_NATIVE 0x00000020
|
||
#define OBJC_MODIFIER_SYNCHRONIZED 0x00000040
|
||
#define OBJC_MODIFIER_ABSTRACT 0x00000080
|
||
#define OBJC_MODIFIER_VOLATILE 0x00000100
|
||
#define OBJC_MODIFIER_TRANSIENT 0x00000200
|
||
#define OBJC_MODIFIER_NONE_SPECIFIED 0x80000000
|
||
|
||
/* 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_EXCEPTIONTHROW "objc_exception_throw"
|
||
#define TAG_SYNCENTER "objc_sync_enter"
|
||
#define TAG_SYNCEXIT "objc_sync_exit"
|
||
#define TAG_SETJMP "_setjmp"
|
||
#define UTAG_EXCDATA "_objc_exception_data"
|
||
|
||
#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"
|
||
|
||
#define TAG_CXX_CONSTRUCT ".cxx_construct"
|
||
#define TAG_CXX_DESTRUCT ".cxx_destruct"
|
||
|
||
/* GNU-specific tags. */
|
||
|
||
#define TAG_EXECCLASS "__objc_exec_class"
|
||
#define TAG_GNUINIT "__objc_gnu_init"
|
||
|
||
/* Flags for lookup_method_static(). */
|
||
#define OBJC_LOOKUP_CLASS 1 /* Look for class methods. */
|
||
#define OBJC_LOOKUP_NO_SUPER 2 /* Do not examine superclasses. */
|
||
|
||
/* The OCTI_... enumeration itself is in objc/objc-act.h. */
|
||
tree objc_global_trees[OCTI_MAX];
|
||
|
||
static void handle_impent (struct imp_entry *);
|
||
|
||
struct imp_entry *imp_list = 0;
|
||
int imp_count = 0; /* `@implementation' */
|
||
int cat_count = 0; /* `@category' */
|
||
|
||
enum tree_code objc_inherit_code;
|
||
int objc_public_flag;
|
||
|
||
/* Use to generate method labels. */
|
||
static int method_slot = 0;
|
||
|
||
#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;
|
||
|
||
/* Store all constructed constant strings in a hash table so that
|
||
they get uniqued properly. */
|
||
|
||
struct string_descriptor GTY(())
|
||
{
|
||
/* The literal argument . */
|
||
tree literal;
|
||
|
||
/* The resulting constant string. */
|
||
tree constructor;
|
||
};
|
||
|
||
static GTY((param_is (struct string_descriptor))) htab_t string_htab;
|
||
|
||
/* Store the EH-volatilized types in a hash table, for easy retrieval. */
|
||
struct volatilized_type GTY(())
|
||
{
|
||
tree type;
|
||
};
|
||
|
||
static GTY((param_is (struct volatilized_type))) htab_t volatilized_htab;
|
||
|
||
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 (void)
|
||
{
|
||
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_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_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, 0);
|
||
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);
|
||
}
|
||
|
||
bool
|
||
objc_init (void)
|
||
{
|
||
#ifdef OBJCPLUS
|
||
if (cxx_init () == false)
|
||
#else
|
||
if (c_objc_common_init () == false)
|
||
#endif
|
||
return false;
|
||
|
||
#ifndef USE_MAPPED_LOCATION
|
||
/* 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. */
|
||
input_line = 0;
|
||
#endif
|
||
|
||
/* 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_error ("can't open %s: %m", dumpname);
|
||
free (dumpname);
|
||
}
|
||
|
||
if (flag_next_runtime)
|
||
{
|
||
TAG_GETCLASS = "objc_getClass";
|
||
TAG_GETMETACLASS = "objc_getMetaClass";
|
||
TAG_MSGSEND = "objc_msgSend";
|
||
TAG_MSGSENDSUPER = "objc_msgSendSuper";
|
||
TAG_MSGSEND_STRET = "objc_msgSend_stret";
|
||
TAG_MSGSENDSUPER_STRET = "objc_msgSendSuper_stret";
|
||
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";
|
||
/* GNU runtime does not provide special functions to support
|
||
structure-returning methods. */
|
||
default_constant_string_class_name = "NXConstantString";
|
||
flag_typed_selectors = 1;
|
||
}
|
||
|
||
init_objc ();
|
||
|
||
if (print_struct_values)
|
||
generate_struct_by_value_array ();
|
||
|
||
return true;
|
||
}
|
||
|
||
void
|
||
objc_finish_file (void)
|
||
{
|
||
mark_referenced_methods ();
|
||
|
||
#ifdef OBJCPLUS
|
||
/* We need to instantiate templates _before_ we emit ObjC metadata;
|
||
if we do not, some metadata (such as selectors) may go missing. */
|
||
at_eof = 1;
|
||
instantiate_pending_templates (0);
|
||
#endif
|
||
|
||
/* Finalize Objective-C runtime data. No need to generate tables
|
||
and code if only checking syntax, or if generating a PCH file. */
|
||
if (!flag_syntax_only && !pch_file)
|
||
finish_objc ();
|
||
|
||
if (gen_declaration_file)
|
||
fclose (gen_declaration_file);
|
||
|
||
#ifdef OBJCPLUS
|
||
cp_finish_file ();
|
||
#endif
|
||
}
|
||
|
||
/* Return the first occurrence of a method declaration corresponding
|
||
to sel_name in rproto_list. Search rproto_list recursively.
|
||
If is_class is 0, search for instance methods, otherwise for class
|
||
methods. */
|
||
static tree
|
||
lookup_method_in_protocol_list (tree rproto_list, tree sel_name,
|
||
int is_class)
|
||
{
|
||
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 (is_class
|
||
? 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, is_class);
|
||
}
|
||
else
|
||
{
|
||
; /* An identifier...if we could not find a protocol. */
|
||
}
|
||
|
||
if (fnd)
|
||
return fnd;
|
||
}
|
||
|
||
return 0;
|
||
}
|
||
|
||
static tree
|
||
lookup_protocol_in_reflist (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;
|
||
}
|
||
|
||
void
|
||
objc_start_class_interface (tree class, tree super_class, tree protos)
|
||
{
|
||
objc_interface_context
|
||
= objc_ivar_context
|
||
= start_class (CLASS_INTERFACE_TYPE, class, super_class, protos);
|
||
objc_public_flag = 0;
|
||
}
|
||
|
||
void
|
||
objc_start_category_interface (tree class, tree categ, tree protos)
|
||
{
|
||
objc_interface_context
|
||
= start_class (CATEGORY_INTERFACE_TYPE, class, categ, protos);
|
||
objc_ivar_chain
|
||
= continue_class (objc_interface_context);
|
||
}
|
||
|
||
void
|
||
objc_start_protocol (tree name, tree protos)
|
||
{
|
||
objc_interface_context
|
||
= start_protocol (PROTOCOL_INTERFACE_TYPE, name, protos);
|
||
}
|
||
|
||
void
|
||
objc_continue_interface (void)
|
||
{
|
||
objc_ivar_chain
|
||
= continue_class (objc_interface_context);
|
||
}
|
||
|
||
void
|
||
objc_finish_interface (void)
|
||
{
|
||
finish_class (objc_interface_context);
|
||
objc_interface_context = NULL_TREE;
|
||
}
|
||
|
||
void
|
||
objc_start_class_implementation (tree class, tree super_class)
|
||
{
|
||
objc_implementation_context
|
||
= objc_ivar_context
|
||
= start_class (CLASS_IMPLEMENTATION_TYPE, class, super_class, NULL_TREE);
|
||
objc_public_flag = 0;
|
||
}
|
||
|
||
void
|
||
objc_start_category_implementation (tree class, tree categ)
|
||
{
|
||
objc_implementation_context
|
||
= start_class (CATEGORY_IMPLEMENTATION_TYPE, class, categ, NULL_TREE);
|
||
objc_ivar_chain
|
||
= continue_class (objc_implementation_context);
|
||
}
|
||
|
||
void
|
||
objc_continue_implementation (void)
|
||
{
|
||
objc_ivar_chain
|
||
= continue_class (objc_implementation_context);
|
||
}
|
||
|
||
void
|
||
objc_finish_implementation (void)
|
||
{
|
||
#ifdef OBJCPLUS
|
||
if (flag_objc_call_cxx_cdtors)
|
||
objc_generate_cxx_cdtors ();
|
||
#endif
|
||
|
||
if (objc_implementation_context)
|
||
{
|
||
finish_class (objc_implementation_context);
|
||
objc_ivar_chain = NULL_TREE;
|
||
objc_implementation_context = NULL_TREE;
|
||
}
|
||
else
|
||
warning (0, "%<@end%> must appear in an @implementation context");
|
||
}
|
||
|
||
void
|
||
objc_set_visibility (int visibility)
|
||
{
|
||
objc_public_flag = visibility;
|
||
}
|
||
|
||
void
|
||
objc_set_method_type (enum tree_code type)
|
||
{
|
||
objc_inherit_code = (type == PLUS_EXPR
|
||
? CLASS_METHOD_DECL
|
||
: INSTANCE_METHOD_DECL);
|
||
}
|
||
|
||
tree
|
||
objc_build_method_signature (tree rettype, tree selector,
|
||
tree optparms, bool ellipsis)
|
||
{
|
||
return build_method_decl (objc_inherit_code, rettype, selector,
|
||
optparms, ellipsis);
|
||
}
|
||
|
||
void
|
||
objc_add_method_declaration (tree decl)
|
||
{
|
||
if (!objc_interface_context)
|
||
fatal_error ("method declaration not in @interface context");
|
||
|
||
objc_add_method (objc_interface_context,
|
||
decl,
|
||
objc_inherit_code == CLASS_METHOD_DECL);
|
||
}
|
||
|
||
void
|
||
objc_start_method_definition (tree decl)
|
||
{
|
||
if (!objc_implementation_context)
|
||
fatal_error ("method definition not in @implementation context");
|
||
|
||
objc_add_method (objc_implementation_context,
|
||
decl,
|
||
objc_inherit_code == CLASS_METHOD_DECL);
|
||
start_method_def (decl);
|
||
}
|
||
|
||
void
|
||
objc_add_instance_variable (tree decl)
|
||
{
|
||
(void) add_instance_variable (objc_ivar_context,
|
||
objc_public_flag,
|
||
decl);
|
||
}
|
||
|
||
/* Return 1 if IDENT is an ObjC/ObjC++ reserved keyword in the context of
|
||
an '@'. */
|
||
|
||
int
|
||
objc_is_reserved_word (tree ident)
|
||
{
|
||
unsigned char code = C_RID_CODE (ident);
|
||
|
||
return (OBJC_IS_AT_KEYWORD (code)
|
||
#ifdef OBJCPLUS
|
||
|| code == RID_CLASS || code == RID_PUBLIC
|
||
|| code == RID_PROTECTED || code == RID_PRIVATE
|
||
|| code == RID_TRY || code == RID_THROW || code == RID_CATCH
|
||
#endif
|
||
);
|
||
}
|
||
|
||
/* Return true if TYPE is 'id'. */
|
||
|
||
static bool
|
||
objc_is_object_id (tree type)
|
||
{
|
||
return OBJC_TYPE_NAME (type) == objc_object_id;
|
||
}
|
||
|
||
static bool
|
||
objc_is_class_id (tree type)
|
||
{
|
||
return OBJC_TYPE_NAME (type) == objc_class_id;
|
||
}
|
||
|
||
/* Construct a C struct with same name as CLASS, a base struct with tag
|
||
SUPER_NAME (if any), and FIELDS indicated. */
|
||
|
||
static tree
|
||
objc_build_struct (tree class, tree fields, tree super_name)
|
||
{
|
||
tree name = CLASS_NAME (class);
|
||
tree s = start_struct (RECORD_TYPE, name);
|
||
tree super = (super_name ? xref_tag (RECORD_TYPE, super_name) : NULL_TREE);
|
||
tree t, objc_info = NULL_TREE;
|
||
|
||
if (super)
|
||
{
|
||
/* Prepend a packed variant of the base class into the layout. This
|
||
is necessary to preserve ObjC ABI compatibility. */
|
||
tree base = build_decl (FIELD_DECL, NULL_TREE, super);
|
||
tree field = TYPE_FIELDS (super);
|
||
|
||
while (field && TREE_CHAIN (field)
|
||
&& TREE_CODE (TREE_CHAIN (field)) == FIELD_DECL)
|
||
field = TREE_CHAIN (field);
|
||
|
||
/* For ObjC ABI purposes, the "packed" size of a base class is the
|
||
the sum of the offset and the size (in bits) of the last field
|
||
in the class. */
|
||
DECL_SIZE (base)
|
||
= (field && TREE_CODE (field) == FIELD_DECL
|
||
? size_binop (PLUS_EXPR,
|
||
size_binop (PLUS_EXPR,
|
||
size_binop
|
||
(MULT_EXPR,
|
||
convert (bitsizetype,
|
||
DECL_FIELD_OFFSET (field)),
|
||
bitsize_int (BITS_PER_UNIT)),
|
||
DECL_FIELD_BIT_OFFSET (field)),
|
||
DECL_SIZE (field))
|
||
: bitsize_zero_node);
|
||
DECL_SIZE_UNIT (base)
|
||
= size_binop (FLOOR_DIV_EXPR, convert (sizetype, DECL_SIZE (base)),
|
||
size_int (BITS_PER_UNIT));
|
||
DECL_ARTIFICIAL (base) = 1;
|
||
DECL_ALIGN (base) = 1;
|
||
DECL_FIELD_CONTEXT (base) = s;
|
||
#ifdef OBJCPLUS
|
||
DECL_FIELD_IS_BASE (base) = 1;
|
||
|
||
if (fields)
|
||
TREE_NO_WARNING (fields) = 1; /* Suppress C++ ABI warnings -- we */
|
||
#endif /* are following the ObjC ABI here. */
|
||
TREE_CHAIN (base) = fields;
|
||
fields = base;
|
||
}
|
||
|
||
/* NB: Calling finish_struct() may cause type TYPE_LANG_SPECIFIC fields
|
||
in all variants of this RECORD_TYPE to be clobbered, but it is therein
|
||
that we store protocol conformance info (e.g., 'NSObject <MyProtocol>').
|
||
Hence, we must squirrel away the ObjC-specific information before calling
|
||
finish_struct(), and then reinstate it afterwards. */
|
||
|
||
for (t = TYPE_NEXT_VARIANT (s); t; t = TYPE_NEXT_VARIANT (t))
|
||
objc_info
|
||
= chainon (objc_info,
|
||
build_tree_list (NULL_TREE, TYPE_OBJC_INFO (t)));
|
||
|
||
/* Point the struct at its related Objective-C class. */
|
||
INIT_TYPE_OBJC_INFO (s);
|
||
TYPE_OBJC_INTERFACE (s) = class;
|
||
|
||
s = finish_struct (s, fields, NULL_TREE);
|
||
|
||
for (t = TYPE_NEXT_VARIANT (s); t;
|
||
t = TYPE_NEXT_VARIANT (t), objc_info = TREE_CHAIN (objc_info))
|
||
{
|
||
TYPE_OBJC_INFO (t) = TREE_VALUE (objc_info);
|
||
/* Replace the IDENTIFIER_NODE with an actual @interface. */
|
||
TYPE_OBJC_INTERFACE (t) = class;
|
||
}
|
||
|
||
/* Use TYPE_BINFO structures to point at the super class, if any. */
|
||
objc_xref_basetypes (s, super);
|
||
|
||
/* Mark this struct as a class template. */
|
||
CLASS_STATIC_TEMPLATE (class) = s;
|
||
|
||
return s;
|
||
}
|
||
|
||
/* Build a type differing from TYPE only in that TYPE_VOLATILE is set.
|
||
Unlike tree.c:build_qualified_type(), preserve TYPE_LANG_SPECIFIC in the
|
||
process. */
|
||
static tree
|
||
objc_build_volatilized_type (tree type)
|
||
{
|
||
tree t;
|
||
|
||
/* Check if we have not constructed the desired variant already. */
|
||
for (t = TYPE_MAIN_VARIANT (type); t; t = TYPE_NEXT_VARIANT (t))
|
||
{
|
||
/* The type qualifiers must (obviously) match up. */
|
||
if (!TYPE_VOLATILE (t)
|
||
|| (TYPE_READONLY (t) != TYPE_READONLY (type))
|
||
|| (TYPE_RESTRICT (t) != TYPE_RESTRICT (type)))
|
||
continue;
|
||
|
||
/* For pointer types, the pointees (and hence their TYPE_LANG_SPECIFIC
|
||
info, if any) must match up. */
|
||
if (POINTER_TYPE_P (t)
|
||
&& (TREE_TYPE (t) != TREE_TYPE (type)))
|
||
continue;
|
||
|
||
/* Everything matches up! */
|
||
return t;
|
||
}
|
||
|
||
/* Ok, we could not re-use any of the pre-existing variants. Create
|
||
a new one. */
|
||
t = build_variant_type_copy (type);
|
||
TYPE_VOLATILE (t) = 1;
|
||
|
||
return t;
|
||
}
|
||
|
||
/* Mark DECL as being 'volatile' for purposes of Darwin
|
||
_setjmp()/_longjmp() exception handling. Called from
|
||
objc_mark_locals_volatile(). */
|
||
void
|
||
objc_volatilize_decl (tree decl)
|
||
{
|
||
/* Do not mess with variables that are 'static' or (already)
|
||
'volatile'. */
|
||
if (!TREE_THIS_VOLATILE (decl) && !TREE_STATIC (decl)
|
||
&& (TREE_CODE (decl) == VAR_DECL
|
||
|| TREE_CODE (decl) == PARM_DECL))
|
||
{
|
||
tree t = TREE_TYPE (decl);
|
||
struct volatilized_type key;
|
||
void **loc;
|
||
|
||
t = objc_build_volatilized_type (t);
|
||
key.type = t;
|
||
loc = htab_find_slot (volatilized_htab, &key, INSERT);
|
||
|
||
if (!*loc)
|
||
{
|
||
*loc = ggc_alloc (sizeof (key));
|
||
((struct volatilized_type *) *loc)->type = t;
|
||
}
|
||
|
||
TREE_TYPE (decl) = t;
|
||
TREE_THIS_VOLATILE (decl) = 1;
|
||
TREE_SIDE_EFFECTS (decl) = 1;
|
||
DECL_REGISTER (decl) = 0;
|
||
#ifndef OBJCPLUS
|
||
C_DECL_REGISTER (decl) = 0;
|
||
#endif
|
||
}
|
||
}
|
||
|
||
/* Check if protocol PROTO is adopted (directly or indirectly) by class CLS
|
||
(including its categoreis and superclasses) or by object type TYP.
|
||
Issue a warning if PROTO is not adopted anywhere and WARN is set. */
|
||
|
||
static bool
|
||
objc_lookup_protocol (tree proto, tree cls, tree typ, bool warn)
|
||
{
|
||
bool class_type = (cls != NULL_TREE);
|
||
|
||
while (cls)
|
||
{
|
||
tree c;
|
||
|
||
/* Check protocols adopted by the class and its categories. */
|
||
for (c = cls; c; c = CLASS_CATEGORY_LIST (c))
|
||
{
|
||
if (lookup_protocol_in_reflist (CLASS_PROTOCOL_LIST (c), proto))
|
||
return true;
|
||
}
|
||
|
||
/* Repeat for superclasses. */
|
||
cls = lookup_interface (CLASS_SUPER_NAME (cls));
|
||
}
|
||
|
||
/* Check for any protocols attached directly to the object type. */
|
||
if (TYPE_HAS_OBJC_INFO (typ))
|
||
{
|
||
if (lookup_protocol_in_reflist (TYPE_OBJC_PROTOCOL_LIST (typ), proto))
|
||
return true;
|
||
}
|
||
|
||
if (warn)
|
||
{
|
||
strcpy (errbuf, class_type ? "class \'" : "type \'");
|
||
gen_type_name_0 (class_type ? typ : TYPE_POINTER_TO (typ));
|
||
strcat (errbuf, "\' does not ");
|
||
/* NB: Types 'id' and 'Class' cannot reasonably be described as
|
||
"implementing" a given protocol, since they do not have an
|
||
implementation. */
|
||
strcat (errbuf, class_type ? "implement" : "conform to");
|
||
strcat (errbuf, " the \'");
|
||
strcat (errbuf, IDENTIFIER_POINTER (PROTOCOL_NAME (proto)));
|
||
strcat (errbuf, "\' protocol");
|
||
warning (0, errbuf);
|
||
}
|
||
|
||
return false;
|
||
}
|
||
|
||
/* Check if class RCLS and instance struct type RTYP conform to at least the
|
||
same protocols that LCLS and LTYP conform to. */
|
||
|
||
static bool
|
||
objc_compare_protocols (tree lcls, tree ltyp, tree rcls, tree rtyp, bool warn)
|
||
{
|
||
tree p;
|
||
bool have_lproto = false;
|
||
|
||
while (lcls)
|
||
{
|
||
/* NB: We do _not_ look at categories defined for LCLS; these may or
|
||
may not get loaded in, and therefore it is unreasonable to require
|
||
that RCLS/RTYP must implement any of their protocols. */
|
||
for (p = CLASS_PROTOCOL_LIST (lcls); p; p = TREE_CHAIN (p))
|
||
{
|
||
have_lproto = true;
|
||
|
||
if (!objc_lookup_protocol (TREE_VALUE (p), rcls, rtyp, warn))
|
||
return warn;
|
||
}
|
||
|
||
/* Repeat for superclasses. */
|
||
lcls = lookup_interface (CLASS_SUPER_NAME (lcls));
|
||
}
|
||
|
||
/* Check for any protocols attached directly to the object type. */
|
||
if (TYPE_HAS_OBJC_INFO (ltyp))
|
||
{
|
||
for (p = TYPE_OBJC_PROTOCOL_LIST (ltyp); p; p = TREE_CHAIN (p))
|
||
{
|
||
have_lproto = true;
|
||
|
||
if (!objc_lookup_protocol (TREE_VALUE (p), rcls, rtyp, warn))
|
||
return warn;
|
||
}
|
||
}
|
||
|
||
/* NB: If LTYP and LCLS have no protocols to search for, return 'true'
|
||
vacuously, _unless_ RTYP is a protocol-qualified 'id'. We can get
|
||
away with simply checking for 'id' or 'Class' (!RCLS), since this
|
||
routine will not get called in other cases. */
|
||
return have_lproto || (rcls != NULL_TREE);
|
||
}
|
||
|
||
/* Determine if it is permissible to assign (if ARGNO is greater than -3)
|
||
an instance of RTYP to an instance of LTYP or to compare the two
|
||
(if ARGNO is equal to -3), per ObjC type system rules. Before
|
||
returning 'true', this routine may issue warnings related to, e.g.,
|
||
protocol conformance. When returning 'false', the routine must
|
||
produce absolutely no warnings; the C or C++ front-end will do so
|
||
instead, if needed. If either LTYP or RTYP is not an Objective-C type,
|
||
the routine must return 'false'.
|
||
|
||
The ARGNO parameter is encoded as follows:
|
||
>= 1 Parameter number (CALLEE contains function being called);
|
||
0 Return value;
|
||
-1 Assignment;
|
||
-2 Initialization;
|
||
-3 Comparison (LTYP and RTYP may match in either direction). */
|
||
|
||
bool
|
||
objc_compare_types (tree ltyp, tree rtyp, int argno, tree callee)
|
||
{
|
||
tree lcls, rcls, lproto, rproto;
|
||
bool pointers_compatible;
|
||
|
||
/* We must be dealing with pointer types */
|
||
if (!POINTER_TYPE_P (ltyp) || !POINTER_TYPE_P (rtyp))
|
||
return false;
|
||
|
||
do
|
||
{
|
||
ltyp = TREE_TYPE (ltyp); /* Remove indirections. */
|
||
rtyp = TREE_TYPE (rtyp);
|
||
}
|
||
while (POINTER_TYPE_P (ltyp) && POINTER_TYPE_P (rtyp));
|
||
|
||
/* Past this point, we are only interested in ObjC class instances,
|
||
or 'id' or 'Class'. */
|
||
if (TREE_CODE (ltyp) != RECORD_TYPE || TREE_CODE (rtyp) != RECORD_TYPE)
|
||
return false;
|
||
|
||
if (!objc_is_object_id (ltyp) && !objc_is_class_id (ltyp)
|
||
&& !TYPE_HAS_OBJC_INFO (ltyp))
|
||
return false;
|
||
|
||
if (!objc_is_object_id (rtyp) && !objc_is_class_id (rtyp)
|
||
&& !TYPE_HAS_OBJC_INFO (rtyp))
|
||
return false;
|
||
|
||
/* Past this point, we are committed to returning 'true' to the caller.
|
||
However, we can still warn about type and/or protocol mismatches. */
|
||
|
||
if (TYPE_HAS_OBJC_INFO (ltyp))
|
||
{
|
||
lcls = TYPE_OBJC_INTERFACE (ltyp);
|
||
lproto = TYPE_OBJC_PROTOCOL_LIST (ltyp);
|
||
}
|
||
else
|
||
lcls = lproto = NULL_TREE;
|
||
|
||
if (TYPE_HAS_OBJC_INFO (rtyp))
|
||
{
|
||
rcls = TYPE_OBJC_INTERFACE (rtyp);
|
||
rproto = TYPE_OBJC_PROTOCOL_LIST (rtyp);
|
||
}
|
||
else
|
||
rcls = rproto = NULL_TREE;
|
||
|
||
/* If we could not find an @interface declaration, we must have
|
||
only seen a @class declaration; for purposes of type comparison,
|
||
treat it as a stand-alone (root) class. */
|
||
|
||
if (lcls && TREE_CODE (lcls) == IDENTIFIER_NODE)
|
||
lcls = NULL_TREE;
|
||
|
||
if (rcls && TREE_CODE (rcls) == IDENTIFIER_NODE)
|
||
rcls = NULL_TREE;
|
||
|
||
/* If either type is an unqualified 'id', we're done. */
|
||
if ((!lproto && objc_is_object_id (ltyp))
|
||
|| (!rproto && objc_is_object_id (rtyp)))
|
||
return true;
|
||
|
||
pointers_compatible = (TYPE_MAIN_VARIANT (ltyp) == TYPE_MAIN_VARIANT (rtyp));
|
||
|
||
/* If the underlying types are the same, and at most one of them has
|
||
a protocol list, we do not need to issue any diagnostics. */
|
||
if (pointers_compatible && (!lproto || !rproto))
|
||
return true;
|
||
|
||
/* If exactly one of the types is 'Class', issue a diagnostic; any
|
||
exceptions of this rule have already been handled. */
|
||
if (objc_is_class_id (ltyp) ^ objc_is_class_id (rtyp))
|
||
pointers_compatible = false;
|
||
/* Otherwise, check for inheritance relations. */
|
||
else
|
||
{
|
||
if (!pointers_compatible)
|
||
pointers_compatible
|
||
= (objc_is_object_id (ltyp) || objc_is_object_id (rtyp));
|
||
|
||
if (!pointers_compatible)
|
||
pointers_compatible = DERIVED_FROM_P (ltyp, rtyp);
|
||
|
||
if (!pointers_compatible && argno == -3)
|
||
pointers_compatible = DERIVED_FROM_P (rtyp, ltyp);
|
||
}
|
||
|
||
/* If the pointers match modulo protocols, check for protocol conformance
|
||
mismatches. */
|
||
if (pointers_compatible)
|
||
{
|
||
pointers_compatible = objc_compare_protocols (lcls, ltyp, rcls, rtyp,
|
||
argno != -3);
|
||
|
||
if (!pointers_compatible && argno == -3)
|
||
pointers_compatible = objc_compare_protocols (rcls, rtyp, lcls, ltyp,
|
||
argno != -3);
|
||
}
|
||
|
||
if (!pointers_compatible)
|
||
{
|
||
/* NB: For the time being, we shall make our warnings look like their
|
||
C counterparts. In the future, we may wish to make them more
|
||
ObjC-specific. */
|
||
switch (argno)
|
||
{
|
||
case -3:
|
||
warning (0, "comparison of distinct Objective-C types lacks a cast");
|
||
break;
|
||
|
||
case -2:
|
||
warning (0, "initialization from distinct Objective-C type");
|
||
break;
|
||
|
||
case -1:
|
||
warning (0, "assignment from distinct Objective-C type");
|
||
break;
|
||
|
||
case 0:
|
||
warning (0, "distinct Objective-C type in return");
|
||
break;
|
||
|
||
default:
|
||
warning (0, "passing argument %d of %qE from distinct "
|
||
"Objective-C type", argno, callee);
|
||
break;
|
||
}
|
||
}
|
||
|
||
return true;
|
||
}
|
||
|
||
/* Check if LTYP and RTYP have the same type qualifiers. If either type
|
||
lives in the volatilized hash table, ignore the 'volatile' bit when
|
||
making the comparison. */
|
||
|
||
bool
|
||
objc_type_quals_match (tree ltyp, tree rtyp)
|
||
{
|
||
int lquals = TYPE_QUALS (ltyp), rquals = TYPE_QUALS (rtyp);
|
||
struct volatilized_type key;
|
||
|
||
key.type = ltyp;
|
||
|
||
if (htab_find_slot (volatilized_htab, &key, NO_INSERT))
|
||
lquals &= ~TYPE_QUAL_VOLATILE;
|
||
|
||
key.type = rtyp;
|
||
|
||
if (htab_find_slot (volatilized_htab, &key, NO_INSERT))
|
||
rquals &= ~TYPE_QUAL_VOLATILE;
|
||
|
||
return (lquals == rquals);
|
||
}
|
||
|
||
#ifndef OBJCPLUS
|
||
/* Determine if CHILD is derived from PARENT. The routine assumes that
|
||
both parameters are RECORD_TYPEs, and is non-reflexive. */
|
||
|
||
static bool
|
||
objc_derived_from_p (tree parent, tree child)
|
||
{
|
||
parent = TYPE_MAIN_VARIANT (parent);
|
||
|
||
for (child = TYPE_MAIN_VARIANT (child);
|
||
TYPE_BINFO (child) && BINFO_N_BASE_BINFOS (TYPE_BINFO (child));)
|
||
{
|
||
child = TYPE_MAIN_VARIANT (BINFO_TYPE (BINFO_BASE_BINFO
|
||
(TYPE_BINFO (child),
|
||
0)));
|
||
|
||
if (child == parent)
|
||
return true;
|
||
}
|
||
|
||
return false;
|
||
}
|
||
#endif
|
||
|
||
static tree
|
||
objc_build_component_ref (tree datum, tree component)
|
||
{
|
||
/* If COMPONENT is NULL, the caller is referring to the anonymous
|
||
base class field. */
|
||
if (!component)
|
||
{
|
||
tree base = TYPE_FIELDS (TREE_TYPE (datum));
|
||
|
||
return build3 (COMPONENT_REF, TREE_TYPE (base), datum, base, NULL_TREE);
|
||
}
|
||
|
||
/* The 'build_component_ref' routine has been removed from the C++
|
||
front-end, but 'finish_class_member_access_expr' seems to be
|
||
a worthy substitute. */
|
||
#ifdef OBJCPLUS
|
||
return finish_class_member_access_expr (datum, component, false);
|
||
#else
|
||
return build_component_ref (datum, component);
|
||
#endif
|
||
}
|
||
|
||
/* Recursively copy inheritance information rooted at BINFO. To do this,
|
||
we emulate the song and dance performed by cp/tree.c:copy_binfo(). */
|
||
|
||
static tree
|
||
objc_copy_binfo (tree binfo)
|
||
{
|
||
tree btype = BINFO_TYPE (binfo);
|
||
tree binfo2 = make_tree_binfo (BINFO_N_BASE_BINFOS (binfo));
|
||
tree base_binfo;
|
||
int ix;
|
||
|
||
BINFO_TYPE (binfo2) = btype;
|
||
BINFO_OFFSET (binfo2) = BINFO_OFFSET (binfo);
|
||
BINFO_BASE_ACCESSES (binfo2) = BINFO_BASE_ACCESSES (binfo);
|
||
|
||
/* Recursively copy base binfos of BINFO. */
|
||
for (ix = 0; BINFO_BASE_ITERATE (binfo, ix, base_binfo); ix++)
|
||
{
|
||
tree base_binfo2 = objc_copy_binfo (base_binfo);
|
||
|
||
BINFO_INHERITANCE_CHAIN (base_binfo2) = binfo2;
|
||
BINFO_BASE_APPEND (binfo2, base_binfo2);
|
||
}
|
||
|
||
return binfo2;
|
||
}
|
||
|
||
/* Record superclass information provided in BASETYPE for ObjC class REF.
|
||
This is loosely based on cp/decl.c:xref_basetypes(). */
|
||
|
||
static void
|
||
objc_xref_basetypes (tree ref, tree basetype)
|
||
{
|
||
tree binfo = make_tree_binfo (basetype ? 1 : 0);
|
||
|
||
TYPE_BINFO (ref) = binfo;
|
||
BINFO_OFFSET (binfo) = size_zero_node;
|
||
BINFO_TYPE (binfo) = ref;
|
||
|
||
if (basetype)
|
||
{
|
||
tree base_binfo = objc_copy_binfo (TYPE_BINFO (basetype));
|
||
|
||
BINFO_INHERITANCE_CHAIN (base_binfo) = binfo;
|
||
BINFO_BASE_ACCESSES (binfo) = VEC_alloc (tree, gc, 1);
|
||
BINFO_BASE_APPEND (binfo, base_binfo);
|
||
BINFO_BASE_ACCESS_APPEND (binfo, access_public_node);
|
||
}
|
||
}
|
||
|
||
static hashval_t
|
||
volatilized_hash (const void *ptr)
|
||
{
|
||
tree typ = ((struct volatilized_type *)ptr)->type;
|
||
|
||
return htab_hash_pointer(typ);
|
||
}
|
||
|
||
static int
|
||
volatilized_eq (const void *ptr1, const void *ptr2)
|
||
{
|
||
tree typ1 = ((struct volatilized_type *)ptr1)->type;
|
||
tree typ2 = ((struct volatilized_type *)ptr2)->type;
|
||
|
||
return typ1 == typ2;
|
||
}
|
||
|
||
/* Called from finish_decl. */
|
||
|
||
void
|
||
objc_check_decl (tree decl)
|
||
{
|
||
tree type = TREE_TYPE (decl);
|
||
|
||
if (TREE_CODE (type) != RECORD_TYPE)
|
||
return;
|
||
if (OBJC_TYPE_NAME (type) && (type = objc_is_class_name (OBJC_TYPE_NAME (type))))
|
||
error ("statically allocated instance of Objective-C class %qs",
|
||
IDENTIFIER_POINTER (type));
|
||
}
|
||
|
||
/* Construct a PROTOCOLS-qualified variant of INTERFACE, where INTERFACE may
|
||
either name an Objective-C class, or refer to the special 'id' or 'Class'
|
||
types. If INTERFACE is not a valid ObjC type, just return it unchanged. */
|
||
|
||
tree
|
||
objc_get_protocol_qualified_type (tree interface, tree protocols)
|
||
{
|
||
/* If INTERFACE is not provided, default to 'id'. */
|
||
tree type = (interface ? objc_is_id (interface) : objc_object_type);
|
||
bool is_ptr = (type != NULL_TREE);
|
||
|
||
if (!is_ptr)
|
||
{
|
||
type = objc_is_class_name (interface);
|
||
|
||
if (type)
|
||
type = xref_tag (RECORD_TYPE, type);
|
||
else
|
||
return interface;
|
||
}
|
||
|
||
if (protocols)
|
||
{
|
||
type = build_variant_type_copy (type);
|
||
|
||
/* For pointers (i.e., 'id' or 'Class'), attach the protocol(s)
|
||
to the pointee. */
|
||
if (is_ptr)
|
||
{
|
||
TREE_TYPE (type) = build_variant_type_copy (TREE_TYPE (type));
|
||
TYPE_POINTER_TO (TREE_TYPE (type)) = type;
|
||
type = TREE_TYPE (type);
|
||
}
|
||
|
||
/* Look up protocols and install in lang specific list. */
|
||
DUP_TYPE_OBJC_INFO (type, TYPE_MAIN_VARIANT (type));
|
||
TYPE_OBJC_PROTOCOL_LIST (type) = lookup_and_install_protocols (protocols);
|
||
|
||
/* For RECORD_TYPEs, point to the @interface; for 'id' and 'Class',
|
||
return the pointer to the new pointee variant. */
|
||
if (is_ptr)
|
||
type = TYPE_POINTER_TO (type);
|
||
else
|
||
TYPE_OBJC_INTERFACE (type)
|
||
= TYPE_OBJC_INTERFACE (TYPE_MAIN_VARIANT (type));
|
||
}
|
||
|
||
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 (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 %qs has circular dependency",
|
||
IDENTIFIER_POINTER (PROTOCOL_NAME (pp)));
|
||
if (pp)
|
||
check_protocol_recursively (proto, PROTOCOL_LIST (pp));
|
||
}
|
||
}
|
||
|
||
/* Look up PROTOCOLS, and return a list of those that are found.
|
||
If none are found, return NULL. */
|
||
|
||
static tree
|
||
lookup_and_install_protocols (tree protocols)
|
||
{
|
||
tree proto;
|
||
tree return_value = NULL_TREE;
|
||
|
||
for (proto = protocols; proto; proto = TREE_CHAIN (proto))
|
||
{
|
||
tree ident = TREE_VALUE (proto);
|
||
tree p = lookup_protocol (ident);
|
||
|
||
if (p)
|
||
return_value = chainon (return_value,
|
||
build_tree_list (NULL_TREE, p));
|
||
else if (ident != error_mark_node)
|
||
error ("cannot find protocol declaration for %qs",
|
||
IDENTIFIER_POINTER (ident));
|
||
}
|
||
|
||
return return_value;
|
||
}
|
||
|
||
/* Create a declaration for field NAME of a given TYPE. */
|
||
|
||
static tree
|
||
create_field_decl (tree type, const char *name)
|
||
{
|
||
return build_decl (FIELD_DECL, get_identifier (name), type);
|
||
}
|
||
|
||
/* Create a global, static declaration for variable NAME of a given TYPE. The
|
||
finish_var_decl() routine will need to be called on it afterwards. */
|
||
|
||
static tree
|
||
start_var_decl (tree type, const char *name)
|
||
{
|
||
tree var = build_decl (VAR_DECL, get_identifier (name), type);
|
||
|
||
TREE_STATIC (var) = 1;
|
||
DECL_INITIAL (var) = error_mark_node; /* A real initializer is coming... */
|
||
DECL_IGNORED_P (var) = 1;
|
||
DECL_ARTIFICIAL (var) = 1;
|
||
DECL_CONTEXT (var) = NULL_TREE;
|
||
#ifdef OBJCPLUS
|
||
DECL_THIS_STATIC (var) = 1; /* squash redeclaration errors */
|
||
#endif
|
||
|
||
return var;
|
||
}
|
||
|
||
/* Finish off the variable declaration created by start_var_decl(). */
|
||
|
||
static void
|
||
finish_var_decl (tree var, tree initializer)
|
||
{
|
||
finish_decl (var, initializer, NULL_TREE);
|
||
/* Ensure that the variable actually gets output. */
|
||
mark_decl_referenced (var);
|
||
/* Mark the decl to avoid "defined but not used" warning. */
|
||
TREE_USED (var) = 1;
|
||
}
|
||
|
||
/* Find the decl for the constant string class reference. This is only
|
||
used for the NeXT runtime. */
|
||
|
||
static tree
|
||
setup_string_decl (void)
|
||
{
|
||
char *name;
|
||
size_t length;
|
||
|
||
/* %s in format will provide room for terminating null */
|
||
length = strlen (STRING_OBJECT_GLOBAL_FORMAT)
|
||
+ strlen (constant_string_class_name);
|
||
name = xmalloc (length);
|
||
sprintf (name, STRING_OBJECT_GLOBAL_FORMAT,
|
||
constant_string_class_name);
|
||
constant_string_global_id = get_identifier (name);
|
||
string_class_decl = lookup_name (constant_string_global_id);
|
||
|
||
return string_class_decl;
|
||
}
|
||
|
||
/* 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 (void)
|
||
{
|
||
tree type;
|
||
enum debug_info_type save_write_symbols = write_symbols;
|
||
const struct gcc_debug_hooks *const save_hooks = debug_hooks;
|
||
|
||
/* Suppress outputting debug symbols, because
|
||
dbxout_init hasn'r been called yet. */
|
||
write_symbols = NO_DEBUG;
|
||
debug_hooks = &do_nothing_debug_hooks;
|
||
|
||
#ifdef OBJCPLUS
|
||
push_lang_context (lang_name_c); /* extern "C" */
|
||
#endif
|
||
|
||
/* The following are also defined in <objc/objc.h> and friends. */
|
||
|
||
objc_object_id = get_identifier (TAG_OBJECT);
|
||
objc_class_id = get_identifier (TAG_CLASS);
|
||
|
||
objc_object_reference = xref_tag (RECORD_TYPE, objc_object_id);
|
||
objc_class_reference = xref_tag (RECORD_TYPE, objc_class_id);
|
||
|
||
objc_object_type = build_pointer_type (objc_object_reference);
|
||
objc_class_type = build_pointer_type (objc_class_reference);
|
||
|
||
objc_object_name = get_identifier (OBJECT_TYPEDEF_NAME);
|
||
objc_class_name = get_identifier (CLASS_TYPEDEF_NAME);
|
||
|
||
/* Declare the 'id' and 'Class' typedefs. */
|
||
|
||
type = lang_hooks.decls.pushdecl (build_decl (TYPE_DECL,
|
||
objc_object_name,
|
||
objc_object_type));
|
||
DECL_IN_SYSTEM_HEADER (type) = 1;
|
||
type = lang_hooks.decls.pushdecl (build_decl (TYPE_DECL,
|
||
objc_class_name,
|
||
objc_class_type));
|
||
DECL_IN_SYSTEM_HEADER (type) = 1;
|
||
|
||
/* Forward-declare '@interface Protocol'. */
|
||
|
||
type = get_identifier (PROTOCOL_OBJECT_CLASS_NAME);
|
||
objc_declare_class (tree_cons (NULL_TREE, type, NULL_TREE));
|
||
objc_protocol_type = build_pointer_type (xref_tag (RECORD_TYPE,
|
||
type));
|
||
|
||
/* Declare type of selector-objects that represent an operation name. */
|
||
|
||
if (flag_next_runtime)
|
||
/* `struct objc_selector *' */
|
||
objc_selector_type
|
||
= build_pointer_type (xref_tag (RECORD_TYPE,
|
||
get_identifier (TAG_SELECTOR)));
|
||
else
|
||
/* `const struct objc_selector *' */
|
||
objc_selector_type
|
||
= build_pointer_type
|
||
(build_qualified_type (xref_tag (RECORD_TYPE,
|
||
get_identifier (TAG_SELECTOR)),
|
||
TYPE_QUAL_CONST));
|
||
|
||
/* Declare receiver type used for dispatching messages to 'super'. */
|
||
|
||
/* `struct objc_super *' */
|
||
objc_super_type = build_pointer_type (xref_tag (RECORD_TYPE,
|
||
get_identifier (TAG_SUPER)));
|
||
|
||
/* Declare pointers to method and ivar lists. */
|
||
objc_method_list_ptr = build_pointer_type
|
||
(xref_tag (RECORD_TYPE,
|
||
get_identifier (UTAG_METHOD_LIST)));
|
||
objc_method_proto_list_ptr
|
||
= build_pointer_type (xref_tag (RECORD_TYPE,
|
||
get_identifier (UTAG_METHOD_PROTOTYPE_LIST)));
|
||
objc_ivar_list_ptr = build_pointer_type
|
||
(xref_tag (RECORD_TYPE,
|
||
get_identifier (UTAG_IVAR_LIST)));
|
||
|
||
/* TREE_NOTHROW is cleared for the message-sending functions,
|
||
because the function that gets called can throw in Obj-C++, or
|
||
could itself call something that can throw even in Obj-C. */
|
||
|
||
if (flag_next_runtime)
|
||
{
|
||
/* 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_function_type (objc_object_type,
|
||
tree_cons (NULL_TREE, objc_object_type,
|
||
tree_cons (NULL_TREE, objc_selector_type,
|
||
NULL_TREE)));
|
||
umsg_decl = builtin_function (TAG_MSGSEND,
|
||
type, 0, NOT_BUILT_IN,
|
||
NULL, NULL_TREE);
|
||
umsg_nonnil_decl = builtin_function (TAG_MSGSEND_NONNIL,
|
||
type, 0, NOT_BUILT_IN,
|
||
NULL, NULL_TREE);
|
||
umsg_stret_decl = builtin_function (TAG_MSGSEND_STRET,
|
||
type, 0, NOT_BUILT_IN,
|
||
NULL, NULL_TREE);
|
||
umsg_nonnil_stret_decl = 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 = 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 availible. */
|
||
umsg_fast_decl = umsg_decl;
|
||
#endif
|
||
|
||
/* id objc_msgSendSuper (struct objc_super *, SEL, ...); */
|
||
/* id objc_msgSendSuper_stret (struct objc_super *, SEL, ...); */
|
||
type
|
||
= build_function_type (objc_object_type,
|
||
tree_cons (NULL_TREE, objc_super_type,
|
||
tree_cons (NULL_TREE, objc_selector_type,
|
||
NULL_TREE)));
|
||
umsg_super_decl = builtin_function (TAG_MSGSENDSUPER,
|
||
type, 0, NOT_BUILT_IN,
|
||
NULL, NULL_TREE);
|
||
umsg_super_stret_decl = 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;
|
||
}
|
||
else
|
||
{
|
||
/* GNU runtime messenger entry points. */
|
||
|
||
/* typedef id (*IMP)(id, SEL, ...); */
|
||
tree IMP_type
|
||
= build_pointer_type
|
||
(build_function_type (objc_object_type,
|
||
tree_cons (NULL_TREE, objc_object_type,
|
||
tree_cons (NULL_TREE, objc_selector_type,
|
||
NULL_TREE))));
|
||
|
||
/* IMP objc_msg_lookup (id, SEL); */
|
||
type
|
||
= build_function_type (IMP_type,
|
||
tree_cons (NULL_TREE, objc_object_type,
|
||
tree_cons (NULL_TREE, objc_selector_type,
|
||
OBJC_VOID_AT_END)));
|
||
umsg_decl = builtin_function (TAG_MSGSEND,
|
||
type, 0, NOT_BUILT_IN,
|
||
NULL, NULL_TREE);
|
||
TREE_NOTHROW (umsg_decl) = 0;
|
||
|
||
/* IMP objc_msg_lookup_super (struct objc_super *, SEL); */
|
||
type
|
||
= build_function_type (IMP_type,
|
||
tree_cons (NULL_TREE, objc_super_type,
|
||
tree_cons (NULL_TREE, objc_selector_type,
|
||
OBJC_VOID_AT_END)));
|
||
umsg_super_decl = builtin_function (TAG_MSGSENDSUPER,
|
||
type, 0, NOT_BUILT_IN,
|
||
NULL, NULL_TREE);
|
||
TREE_NOTHROW (umsg_super_decl) = 0;
|
||
|
||
/* The following GNU runtime entry point is called to initialize
|
||
each module:
|
||
|
||
__objc_exec_class (void *); */
|
||
type
|
||
= build_function_type (void_type_node,
|
||
tree_cons (NULL_TREE, ptr_type_node,
|
||
OBJC_VOID_AT_END));
|
||
execclass_decl = builtin_function (TAG_EXECCLASS,
|
||
type, 0, NOT_BUILT_IN,
|
||
NULL, NULL_TREE);
|
||
}
|
||
|
||
/* id objc_getClass (const char *); */
|
||
|
||
type = build_function_type (objc_object_type,
|
||
tree_cons (NULL_TREE,
|
||
const_string_type_node,
|
||
OBJC_VOID_AT_END));
|
||
|
||
objc_get_class_decl
|
||
= builtin_function (TAG_GETCLASS, type, 0, NOT_BUILT_IN,
|
||
NULL, NULL_TREE);
|
||
|
||
/* id objc_getMetaClass (const char *); */
|
||
|
||
objc_get_meta_class_decl
|
||
= builtin_function (TAG_GETMETACLASS, type, 0, NOT_BUILT_IN, NULL, NULL_TREE);
|
||
|
||
build_class_template ();
|
||
build_super_template ();
|
||
build_protocol_template ();
|
||
build_category_template ();
|
||
build_objc_exception_stuff ();
|
||
|
||
if (flag_next_runtime)
|
||
build_next_objc_exception_stuff ();
|
||
|
||
/* static SEL _OBJC_SELECTOR_TABLE[]; */
|
||
|
||
if (! flag_next_runtime)
|
||
build_selector_table_decl ();
|
||
|
||
/* 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);
|
||
objc_declare_class (tree_cons (NULL_TREE, constant_string_id, NULL_TREE));
|
||
|
||
/* Pre-build the following entities - for speed/convenience. */
|
||
self_id = get_identifier ("self");
|
||
ucmd_id = get_identifier ("_cmd");
|
||
|
||
#ifdef OBJCPLUS
|
||
pop_lang_context ();
|
||
#endif
|
||
|
||
write_symbols = save_write_symbols;
|
||
debug_hooks = save_hooks;
|
||
}
|
||
|
||
/* Ensure that the ivar list for NSConstantString/NXConstantString
|
||
(or whatever was specified via `-fconstant-string-class')
|
||
contains fields at least as large as the following three, so that
|
||
the runtime can stomp on them with confidence:
|
||
|
||
struct STRING_OBJECT_CLASS_NAME
|
||
{
|
||
Object isa;
|
||
char *cString;
|
||
unsigned int length;
|
||
}; */
|
||
|
||
static int
|
||
check_string_class_template (void)
|
||
{
|
||
tree field_decl = objc_get_class_ivars (constant_string_id);
|
||
|
||
#define AT_LEAST_AS_LARGE_AS(F, T) \
|
||
(F && TREE_CODE (F) == FIELD_DECL \
|
||
&& (TREE_INT_CST_LOW (TYPE_SIZE (TREE_TYPE (F))) \
|
||
>= TREE_INT_CST_LOW (TYPE_SIZE (T))))
|
||
|
||
if (!AT_LEAST_AS_LARGE_AS (field_decl, ptr_type_node))
|
||
return 0;
|
||
|
||
field_decl = TREE_CHAIN (field_decl);
|
||
if (!AT_LEAST_AS_LARGE_AS (field_decl, ptr_type_node))
|
||
return 0;
|
||
|
||
field_decl = TREE_CHAIN (field_decl);
|
||
return AT_LEAST_AS_LARGE_AS (field_decl, unsigned_type_node);
|
||
|
||
#undef AT_LEAST_AS_LARGE_AS
|
||
}
|
||
|
||
/* Avoid calling `check_string_class_template ()' more than once. */
|
||
static GTY(()) int string_layout_checked;
|
||
|
||
/* Construct an internal string layout to be used as a template for
|
||
creating NSConstantString/NXConstantString instances. */
|
||
|
||
static tree
|
||
objc_build_internal_const_str_type (void)
|
||
{
|
||
tree type = (*lang_hooks.types.make_type) (RECORD_TYPE);
|
||
tree fields = build_decl (FIELD_DECL, NULL_TREE, ptr_type_node);
|
||
tree field = build_decl (FIELD_DECL, NULL_TREE, ptr_type_node);
|
||
|
||
TREE_CHAIN (field) = fields; fields = field;
|
||
field = build_decl (FIELD_DECL, NULL_TREE, unsigned_type_node);
|
||
TREE_CHAIN (field) = fields; fields = field;
|
||
/* NB: The finish_builtin_struct() routine expects FIELD_DECLs in
|
||
reverse order! */
|
||
finish_builtin_struct (type, "__builtin_ObjCString",
|
||
fields, NULL_TREE);
|
||
|
||
return type;
|
||
}
|
||
|
||
/* Custom build_string which sets TREE_TYPE! */
|
||
|
||
static tree
|
||
my_build_string (int len, const char *str)
|
||
{
|
||
return fix_string_type (build_string (len, str));
|
||
}
|
||
|
||
/* Build a string with contents STR and length LEN and convert it to a
|
||
pointer. */
|
||
|
||
static tree
|
||
my_build_string_pointer (int len, const char *str)
|
||
{
|
||
tree string = my_build_string (len, str);
|
||
tree ptrtype = build_pointer_type (TREE_TYPE (TREE_TYPE (string)));
|
||
return build1 (ADDR_EXPR, ptrtype, string);
|
||
}
|
||
|
||
static hashval_t
|
||
string_hash (const void *ptr)
|
||
{
|
||
tree str = ((struct string_descriptor *)ptr)->literal;
|
||
const unsigned char *p = (const unsigned char *) TREE_STRING_POINTER (str);
|
||
int i, len = TREE_STRING_LENGTH (str);
|
||
hashval_t h = len;
|
||
|
||
for (i = 0; i < len; i++)
|
||
h = ((h * 613) + p[i]);
|
||
|
||
return h;
|
||
}
|
||
|
||
static int
|
||
string_eq (const void *ptr1, const void *ptr2)
|
||
{
|
||
tree str1 = ((struct string_descriptor *)ptr1)->literal;
|
||
tree str2 = ((struct string_descriptor *)ptr2)->literal;
|
||
int len1 = TREE_STRING_LENGTH (str1);
|
||
|
||
return (len1 == TREE_STRING_LENGTH (str2)
|
||
&& !memcmp (TREE_STRING_POINTER (str1), TREE_STRING_POINTER (str2),
|
||
len1));
|
||
}
|
||
|
||
/* 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
|
||
objc_build_string_object (tree string)
|
||
{
|
||
tree initlist, constructor, constant_string_class;
|
||
int length;
|
||
tree fields, addr;
|
||
struct string_descriptor *desc, key;
|
||
void **loc;
|
||
|
||
/* Prep the string argument. */
|
||
string = fix_string_type (string);
|
||
TREE_SET_CODE (string, STRING_CST);
|
||
length = TREE_STRING_LENGTH (string) - 1;
|
||
|
||
/* Check whether the string class being used actually exists and has the
|
||
correct ivar layout. */
|
||
if (!string_layout_checked)
|
||
{
|
||
string_layout_checked = -1;
|
||
constant_string_class = lookup_interface (constant_string_id);
|
||
internal_const_str_type = objc_build_internal_const_str_type ();
|
||
|
||
if (!constant_string_class
|
||
|| !(constant_string_type
|
||
= CLASS_STATIC_TEMPLATE (constant_string_class)))
|
||
error ("cannot find interface declaration for %qs",
|
||
IDENTIFIER_POINTER (constant_string_id));
|
||
/* The NSConstantString/NXConstantString ivar layout is now known. */
|
||
else if (!check_string_class_template ())
|
||
error ("interface %qs does not have valid constant string layout",
|
||
IDENTIFIER_POINTER (constant_string_id));
|
||
/* For the NeXT runtime, we can generate a literal reference
|
||
to the string class, don't need to run a constructor. */
|
||
else if (flag_next_runtime && !setup_string_decl ())
|
||
error ("cannot find reference tag for class %qs",
|
||
IDENTIFIER_POINTER (constant_string_id));
|
||
else
|
||
{
|
||
string_layout_checked = 1; /* Success! */
|
||
add_class_reference (constant_string_id);
|
||
}
|
||
}
|
||
|
||
if (string_layout_checked == -1)
|
||
return error_mark_node;
|
||
|
||
/* Perhaps we already constructed a constant string just like this one? */
|
||
key.literal = string;
|
||
loc = htab_find_slot (string_htab, &key, INSERT);
|
||
desc = *loc;
|
||
|
||
if (!desc)
|
||
{
|
||
tree var;
|
||
*loc = desc = ggc_alloc (sizeof (*desc));
|
||
desc->literal = string;
|
||
|
||
/* GNU: (NXConstantString *) & ((__builtin_ObjCString) { NULL, string, length }) */
|
||
/* NeXT: (NSConstantString *) & ((__builtin_ObjCString) { isa, string, length }) */
|
||
fields = TYPE_FIELDS (internal_const_str_type);
|
||
initlist
|
||
= build_tree_list (fields,
|
||
flag_next_runtime
|
||
? build_unary_op (ADDR_EXPR, string_class_decl, 0)
|
||
: build_int_cst (NULL_TREE, 0));
|
||
fields = TREE_CHAIN (fields);
|
||
initlist = tree_cons (fields, build_unary_op (ADDR_EXPR, string, 1),
|
||
initlist);
|
||
fields = TREE_CHAIN (fields);
|
||
initlist = tree_cons (fields, build_int_cst (NULL_TREE, length),
|
||
initlist);
|
||
constructor = objc_build_constructor (internal_const_str_type,
|
||
nreverse (initlist));
|
||
TREE_INVARIANT (constructor) = true;
|
||
|
||
if (!flag_next_runtime)
|
||
constructor
|
||
= objc_add_static_instance (constructor, constant_string_type);
|
||
else
|
||
{
|
||
var = build_decl (CONST_DECL, NULL, TREE_TYPE (constructor));
|
||
DECL_INITIAL (var) = constructor;
|
||
TREE_STATIC (var) = 1;
|
||
pushdecl_top_level (var);
|
||
constructor = var;
|
||
}
|
||
desc->constructor = constructor;
|
||
}
|
||
|
||
addr = convert (build_pointer_type (constant_string_type),
|
||
build_unary_op (ADDR_EXPR, desc->constructor, 1));
|
||
|
||
return addr;
|
||
}
|
||
|
||
/* Declare a static instance of CLASS_DECL initialized by CONSTRUCTOR. */
|
||
|
||
static GTY(()) int num_static_inst;
|
||
|
||
static tree
|
||
objc_add_static_instance (tree constructor, tree class_decl)
|
||
{
|
||
tree *chain, decl;
|
||
char buf[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 (OBJC_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;
|
||
TREE_USED (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, 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
|
||
objc_build_constructor (tree type, tree elts)
|
||
{
|
||
tree constructor = build_constructor_from_list (type, elts);
|
||
|
||
TREE_CONSTANT (constructor) = 1;
|
||
TREE_STATIC (constructor) = 1;
|
||
TREE_READONLY (constructor) = 1;
|
||
|
||
#ifdef OBJCPLUS
|
||
/* Adjust for impedance mismatch. We should figure out how to build
|
||
CONSTRUCTORs that consistently please both the C and C++ gods. */
|
||
if (!TREE_PURPOSE (elts))
|
||
TREE_TYPE (constructor) = NULL_TREE;
|
||
TREE_HAS_CONSTRUCTOR (constructor) = 1;
|
||
#endif
|
||
|
||
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 (void)
|
||
{
|
||
tree field_decl, field_decl_chain;
|
||
|
||
objc_symtab_template
|
||
= start_struct (RECORD_TYPE, get_identifier (UTAG_SYMTAB));
|
||
|
||
/* long sel_ref_cnt; */
|
||
field_decl = create_field_decl (long_integer_type_node, "sel_ref_cnt");
|
||
field_decl_chain = field_decl;
|
||
|
||
/* SEL *refs; */
|
||
field_decl = create_field_decl (build_pointer_type (objc_selector_type),
|
||
"refs");
|
||
chainon (field_decl_chain, field_decl);
|
||
|
||
/* short cls_def_cnt; */
|
||
field_decl = create_field_decl (short_integer_type_node, "cls_def_cnt");
|
||
chainon (field_decl_chain, field_decl);
|
||
|
||
/* short cat_def_cnt; */
|
||
field_decl = create_field_decl (short_integer_type_node,
|
||
"cat_def_cnt");
|
||
chainon (field_decl_chain, field_decl);
|
||
|
||
if (imp_count || cat_count || !flag_next_runtime)
|
||
{
|
||
/* 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
|
||
+ (flag_next_runtime? -1: 0);
|
||
field_decl = create_field_decl
|
||
(build_array_type
|
||
(ptr_type_node,
|
||
build_index_type (build_int_cst (NULL_TREE, 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 (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_cst (NULL_TREE, 0);
|
||
|
||
initlist = tree_cons (NULL_TREE, expr, initlist);
|
||
}
|
||
|
||
return objc_build_constructor (type, nreverse (initlist));
|
||
}
|
||
|
||
/* Construct the initial value for all of _objc_symtab. */
|
||
|
||
static tree
|
||
init_objc_symtab (tree type)
|
||
{
|
||
tree initlist;
|
||
|
||
/* sel_ref_cnt = { ..., 5, ... } */
|
||
|
||
initlist = build_tree_list (NULL_TREE,
|
||
build_int_cst (long_integer_type_node, 0));
|
||
|
||
/* refs = { ..., _OBJC_SELECTOR_TABLE, ... } */
|
||
|
||
if (flag_next_runtime || ! sel_ref_chain)
|
||
initlist = tree_cons (NULL_TREE, build_int_cst (NULL_TREE, 0), initlist);
|
||
else
|
||
initlist
|
||
= tree_cons (NULL_TREE,
|
||
convert (build_pointer_type (objc_selector_type),
|
||
build_unary_op (ADDR_EXPR,
|
||
UOBJC_SELECTOR_TABLE_decl, 1)),
|
||
initlist);
|
||
|
||
/* cls_def_cnt = { ..., 5, ... } */
|
||
|
||
initlist = tree_cons (NULL_TREE, build_int_cst (NULL_TREE, imp_count), initlist);
|
||
|
||
/* cat_def_cnt = { ..., 5, ... } */
|
||
|
||
initlist = tree_cons (NULL_TREE, build_int_cst (NULL_TREE, cat_count), initlist);
|
||
|
||
/* cls_def = { ..., { &Foo, &Bar, ...}, ... } */
|
||
|
||
if (imp_count || cat_count || !flag_next_runtime)
|
||
{
|
||
|
||
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 objc_build_constructor (type, nreverse (initlist));
|
||
}
|
||
|
||
/* Generate forward declarations for metadata such as
|
||
'OBJC_CLASS_...'. */
|
||
|
||
static tree
|
||
build_metadata_decl (const char *name, tree type)
|
||
{
|
||
tree decl;
|
||
|
||
/* struct TYPE NAME_<name>; */
|
||
decl = start_var_decl (type, synth_id_with_class_suffix
|
||
(name,
|
||
objc_implementation_context));
|
||
|
||
return decl;
|
||
}
|
||
|
||
/* Push forward-declarations of all the categories so that
|
||
init_def_list can use them in a CONSTRUCTOR. */
|
||
|
||
static void
|
||
forward_declare_categories (void)
|
||
{
|
||
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;
|
||
/* extern struct objc_category _OBJC_CATEGORY_<name>; */
|
||
impent->class_decl = build_metadata_decl ("_OBJC_CATEGORY",
|
||
objc_category_template);
|
||
}
|
||
}
|
||
objc_implementation_context = sav;
|
||
}
|
||
|
||
/* Create the declaration of _OBJC_SYMBOLS, with type `struct _objc_symtab'
|
||
and initialized appropriately. */
|
||
|
||
static void
|
||
generate_objc_symtab_decl (void)
|
||
{
|
||
/* forward declare categories */
|
||
if (cat_count)
|
||
forward_declare_categories ();
|
||
|
||
build_objc_symtab_template ();
|
||
UOBJC_SYMBOLS_decl = start_var_decl (objc_symtab_template, "_OBJC_SYMBOLS");
|
||
finish_var_decl (UOBJC_SYMBOLS_decl,
|
||
init_objc_symtab (TREE_TYPE (UOBJC_SYMBOLS_decl)));
|
||
}
|
||
|
||
static tree
|
||
init_module_descriptor (tree type)
|
||
{
|
||
tree initlist, expr;
|
||
|
||
/* version = { 1, ... } */
|
||
|
||
expr = build_int_cst (long_integer_type_node, OBJC_VERSION);
|
||
initlist = build_tree_list (NULL_TREE, expr);
|
||
|
||
/* size = { ..., sizeof (struct _objc_module), ... } */
|
||
|
||
expr = convert (long_integer_type_node,
|
||
size_in_bytes (objc_module_template));
|
||
initlist = tree_cons (NULL_TREE, expr, initlist);
|
||
|
||
/* Don't provide any file name for security reasons. */
|
||
/* name = { ..., "", ... } */
|
||
|
||
expr = add_objc_string (get_identifier (""), 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_cst (NULL_TREE, 0);
|
||
initlist = tree_cons (NULL_TREE, expr, initlist);
|
||
|
||
return objc_build_constructor (type, nreverse (initlist));
|
||
}
|
||
|
||
/* Write out the data structures to describe Objective C classes defined.
|
||
|
||
struct _objc_module { ... } _OBJC_MODULE = { ... }; */
|
||
|
||
static void
|
||
build_module_descriptor (void)
|
||
{
|
||
tree field_decl, field_decl_chain;
|
||
|
||
#ifdef OBJCPLUS
|
||
push_lang_context (lang_name_c); /* extern "C" */
|
||
#endif
|
||
|
||
objc_module_template
|
||
= start_struct (RECORD_TYPE, get_identifier (UTAG_MODULE));
|
||
|
||
/* long version; */
|
||
field_decl = create_field_decl (long_integer_type_node, "version");
|
||
field_decl_chain = field_decl;
|
||
|
||
/* long size; */
|
||
field_decl = create_field_decl (long_integer_type_node, "size");
|
||
chainon (field_decl_chain, field_decl);
|
||
|
||
/* char *name; */
|
||
field_decl = create_field_decl (string_type_node, "name");
|
||
chainon (field_decl_chain, field_decl);
|
||
|
||
/* struct _objc_symtab *symtab; */
|
||
field_decl
|
||
= create_field_decl (build_pointer_type
|
||
(xref_tag (RECORD_TYPE,
|
||
get_identifier (UTAG_SYMTAB))),
|
||
"symtab");
|
||
chainon (field_decl_chain, field_decl);
|
||
|
||
finish_struct (objc_module_template, field_decl_chain, NULL_TREE);
|
||
|
||
/* Create an instance of "_objc_module". */
|
||
UOBJC_MODULES_decl = start_var_decl (objc_module_template, "_OBJC_MODULES");
|
||
finish_var_decl (UOBJC_MODULES_decl,
|
||
init_module_descriptor (TREE_TYPE (UOBJC_MODULES_decl)));
|
||
|
||
#ifdef OBJCPLUS
|
||
pop_lang_context ();
|
||
#endif
|
||
}
|
||
|
||
/* The GNU runtime requires us to provide a static initializer function
|
||
for each module:
|
||
|
||
static void __objc_gnu_init (void) {
|
||
__objc_exec_class (&L_OBJC_MODULES);
|
||
} */
|
||
|
||
static void
|
||
build_module_initializer_routine (void)
|
||
{
|
||
tree body;
|
||
|
||
#ifdef OBJCPLUS
|
||
push_lang_context (lang_name_c); /* extern "C" */
|
||
#endif
|
||
|
||
objc_push_parm (build_decl (PARM_DECL, NULL_TREE, void_type_node));
|
||
objc_start_function (get_identifier (TAG_GNUINIT),
|
||
build_function_type (void_type_node,
|
||
OBJC_VOID_AT_END),
|
||
NULL_TREE, objc_get_parm_info (0));
|
||
|
||
body = c_begin_compound_stmt (true);
|
||
add_stmt (build_function_call
|
||
(execclass_decl,
|
||
build_tree_list
|
||
(NULL_TREE,
|
||
build_unary_op (ADDR_EXPR,
|
||
UOBJC_MODULES_decl, 0))));
|
||
add_stmt (c_end_compound_stmt (body, true));
|
||
|
||
TREE_PUBLIC (current_function_decl) = 0;
|
||
|
||
#ifndef OBJCPLUS
|
||
/* For Objective-C++, we will need to call __objc_gnu_init
|
||
from objc_generate_static_init_call() below. */
|
||
DECL_STATIC_CONSTRUCTOR (current_function_decl) = 1;
|
||
#endif
|
||
|
||
GNU_INIT_decl = current_function_decl;
|
||
finish_function ();
|
||
|
||
#ifdef OBJCPLUS
|
||
pop_lang_context ();
|
||
#endif
|
||
}
|
||
|
||
#ifdef OBJCPLUS
|
||
/* Return 1 if the __objc_gnu_init function has been synthesized and needs
|
||
to be called by the module initializer routine. */
|
||
|
||
int
|
||
objc_static_init_needed_p (void)
|
||
{
|
||
return (GNU_INIT_decl != NULL_TREE);
|
||
}
|
||
|
||
/* Generate a call to the __objc_gnu_init initializer function. */
|
||
|
||
tree
|
||
objc_generate_static_init_call (tree ctors ATTRIBUTE_UNUSED)
|
||
{
|
||
add_stmt (build_stmt (EXPR_STMT,
|
||
build_function_call (GNU_INIT_decl, NULL_TREE)));
|
||
|
||
return ctors;
|
||
}
|
||
#endif /* OBJCPLUS */
|
||
|
||
/* Return the DECL of the string IDENT in the SECTION. */
|
||
|
||
static tree
|
||
get_objc_string_decl (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 (void)
|
||
{
|
||
tree decls = NULL_TREE, expr = NULL_TREE;
|
||
tree class_name, class, decl, initlist;
|
||
tree cl_chain, in_chain, type
|
||
= build_array_type (build_pointer_type (void_type_node), NULL_TREE);
|
||
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);
|
||
decl = start_var_decl (type, buf);
|
||
|
||
/* Output {class_name, ...}. */
|
||
class = TREE_VALUE (cl_chain);
|
||
class_name = get_objc_string_decl (OBJC_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_cst (NULL_TREE, 0), initlist);
|
||
|
||
expr = objc_build_constructor (TREE_TYPE (decl), nreverse (initlist));
|
||
finish_var_decl (decl, expr);
|
||
decls
|
||
= tree_cons (NULL_TREE, build_unary_op (ADDR_EXPR, decl, 1), decls);
|
||
}
|
||
|
||
decls = tree_cons (NULL_TREE, build_int_cst (NULL_TREE, 0), decls);
|
||
expr = objc_build_constructor (type, nreverse (decls));
|
||
static_instances_decl = start_var_decl (type, "_OBJC_STATIC_INSTANCES");
|
||
finish_var_decl (static_instances_decl, expr);
|
||
}
|
||
|
||
static GTY(()) int selector_reference_idx;
|
||
|
||
static tree
|
||
build_selector_reference_decl (void)
|
||
{
|
||
tree decl;
|
||
char buf[256];
|
||
|
||
sprintf (buf, "_OBJC_SELECTOR_REFERENCES_%d", selector_reference_idx++);
|
||
decl = start_var_decl (objc_selector_type, buf);
|
||
|
||
return decl;
|
||
}
|
||
|
||
static void
|
||
build_selector_table_decl (void)
|
||
{
|
||
tree temp;
|
||
|
||
if (flag_typed_selectors)
|
||
{
|
||
build_selector_template ();
|
||
temp = build_array_type (objc_selector_template, NULL_TREE);
|
||
}
|
||
else
|
||
temp = build_array_type (objc_selector_type, NULL_TREE);
|
||
|
||
UOBJC_SELECTOR_TABLE_decl = start_var_decl (temp, "_OBJC_SELECTOR_TABLE");
|
||
}
|
||
|
||
/* Just a handy wrapper for add_objc_string. */
|
||
|
||
static tree
|
||
build_selector (tree ident)
|
||
{
|
||
return convert (objc_selector_type,
|
||
add_objc_string (ident, meth_var_names));
|
||
}
|
||
|
||
static void
|
||
build_selector_translation_table (void)
|
||
{
|
||
tree chain, initlist = NULL_TREE;
|
||
int offset = 0;
|
||
tree decl = NULL_TREE;
|
||
|
||
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)
|
||
{
|
||
location_t *loc;
|
||
if (flag_next_runtime && TREE_PURPOSE (chain))
|
||
loc = &DECL_SOURCE_LOCATION (TREE_PURPOSE (chain));
|
||
else
|
||
loc = &input_location;
|
||
warning (0, "%Hcreating selector for nonexistent method %qE",
|
||
loc, TREE_VALUE (chain));
|
||
}
|
||
}
|
||
|
||
expr = build_selector (TREE_VALUE (chain));
|
||
/* add one for the '\0' character */
|
||
offset += IDENTIFIER_LENGTH (TREE_VALUE (chain)) + 1;
|
||
|
||
if (flag_next_runtime)
|
||
{
|
||
decl = TREE_PURPOSE (chain);
|
||
finish_var_decl (decl, expr);
|
||
}
|
||
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 = objc_build_constructor (objc_selector_template,
|
||
nreverse (eltlist));
|
||
}
|
||
|
||
initlist = tree_cons (NULL_TREE, expr, initlist);
|
||
}
|
||
}
|
||
|
||
if (! flag_next_runtime)
|
||
{
|
||
/* Cause the selector table (previously forward-declared)
|
||
to be actually output. */
|
||
initlist = tree_cons (NULL_TREE,
|
||
flag_typed_selectors
|
||
? objc_build_constructor
|
||
(objc_selector_template,
|
||
tree_cons (NULL_TREE,
|
||
build_int_cst (NULL_TREE, 0),
|
||
tree_cons (NULL_TREE,
|
||
build_int_cst (NULL_TREE, 0),
|
||
NULL_TREE)))
|
||
: build_int_cst (NULL_TREE, 0), initlist);
|
||
initlist = objc_build_constructor (TREE_TYPE (UOBJC_SELECTOR_TABLE_decl),
|
||
nreverse (initlist));
|
||
finish_var_decl (UOBJC_SELECTOR_TABLE_decl, initlist);
|
||
}
|
||
}
|
||
|
||
static tree
|
||
get_proto_encoding (tree proto)
|
||
{
|
||
tree encoding;
|
||
if (proto)
|
||
{
|
||
if (! METHOD_ENCODING (proto))
|
||
{
|
||
encoding = encode_method_prototype (proto);
|
||
METHOD_ENCODING (proto) = encoding;
|
||
}
|
||
else
|
||
encoding = METHOD_ENCODING (proto);
|
||
|
||
return add_objc_string (encoding, meth_var_types);
|
||
}
|
||
else
|
||
return build_int_cst (NULL_TREE, 0);
|
||
}
|
||
|
||
/* 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 (tree ident, tree 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_cst (NULL_TREE, index)),
|
||
1);
|
||
return convert (objc_selector_type, expr);
|
||
}
|
||
|
||
static tree
|
||
build_selector_reference (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_cst (NULL_TREE, index)));
|
||
|
||
index++;
|
||
chain = &TREE_CHAIN (*chain);
|
||
}
|
||
|
||
expr = (flag_next_runtime ? build_selector_reference_decl (): NULL_TREE);
|
||
|
||
*chain = tree_cons (expr, ident, NULL_TREE);
|
||
|
||
return (flag_next_runtime
|
||
? expr
|
||
: build_array_ref (UOBJC_SELECTOR_TABLE_decl,
|
||
build_int_cst (NULL_TREE, index)));
|
||
}
|
||
|
||
static GTY(()) int class_reference_idx;
|
||
|
||
static tree
|
||
build_class_reference_decl (void)
|
||
{
|
||
tree decl;
|
||
char buf[256];
|
||
|
||
sprintf (buf, "_OBJC_CLASS_REFERENCES_%d", class_reference_idx++);
|
||
decl = start_var_decl (objc_class_type, buf);
|
||
|
||
return decl;
|
||
}
|
||
|
||
/* Create a class reference, but don't create a variable to reference
|
||
it. */
|
||
|
||
static void
|
||
add_class_reference (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
|
||
objc_get_class_reference (tree ident)
|
||
{
|
||
tree orig_ident = (DECL_P (ident)
|
||
? DECL_NAME (ident)
|
||
: TYPE_P (ident)
|
||
? OBJC_TYPE_NAME (ident)
|
||
: ident);
|
||
bool local_scope = false;
|
||
|
||
#ifdef OBJCPLUS
|
||
if (processing_template_decl)
|
||
/* Must wait until template instantiation time. */
|
||
return build_min_nt (CLASS_REFERENCE_EXPR, ident);
|
||
#endif
|
||
|
||
if (TREE_CODE (ident) == TYPE_DECL)
|
||
ident = (DECL_ORIGINAL_TYPE (ident)
|
||
? DECL_ORIGINAL_TYPE (ident)
|
||
: TREE_TYPE (ident));
|
||
|
||
#ifdef OBJCPLUS
|
||
if (TYPE_P (ident) && TYPE_CONTEXT (ident)
|
||
&& TYPE_CONTEXT (ident) != global_namespace)
|
||
local_scope = true;
|
||
#endif
|
||
|
||
if (local_scope || !(ident = objc_is_class_name (ident)))
|
||
{
|
||
error ("%qs is not an Objective-C class name or alias",
|
||
IDENTIFIER_POINTER (orig_ident));
|
||
return error_mark_node;
|
||
}
|
||
|
||
if (flag_next_runtime && !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)));
|
||
|
||
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 (tree ident, enum string_section section)
|
||
{
|
||
tree *chain, decl, type, string_expr;
|
||
|
||
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 convert (string_type_node,
|
||
build_unary_op (ADDR_EXPR, TREE_PURPOSE (*chain), 1));
|
||
|
||
chain = &TREE_CHAIN (*chain);
|
||
}
|
||
|
||
decl = build_objc_string_decl (section);
|
||
|
||
type = build_array_type
|
||
(char_type_node,
|
||
build_index_type
|
||
(build_int_cst (NULL_TREE,
|
||
IDENTIFIER_LENGTH (ident))));
|
||
decl = start_var_decl (type, IDENTIFIER_POINTER (DECL_NAME (decl)));
|
||
string_expr = my_build_string (IDENTIFIER_LENGTH (ident) + 1,
|
||
IDENTIFIER_POINTER (ident));
|
||
finish_var_decl (decl, string_expr);
|
||
|
||
*chain = tree_cons (decl, ident, NULL_TREE);
|
||
|
||
return convert (string_type_node, build_unary_op (ADDR_EXPR, decl, 1));
|
||
}
|
||
|
||
static GTY(()) int class_names_idx;
|
||
static GTY(()) int meth_var_names_idx;
|
||
static GTY(()) int meth_var_types_idx;
|
||
|
||
static tree
|
||
build_objc_string_decl (enum string_section section)
|
||
{
|
||
tree decl, ident;
|
||
char buf[256];
|
||
|
||
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) = 0;
|
||
TREE_USED (decl) = 1;
|
||
TREE_CONSTANT (decl) = 1;
|
||
DECL_CONTEXT (decl) = 0;
|
||
DECL_ARTIFICIAL (decl) = 1;
|
||
#ifdef OBJCPLUS
|
||
DECL_THIS_STATIC (decl) = 1; /* squash redeclaration errors */
|
||
#endif
|
||
|
||
make_decl_rtl (decl);
|
||
pushdecl_top_level (decl);
|
||
|
||
return decl;
|
||
}
|
||
|
||
|
||
void
|
||
objc_declare_alias (tree alias_ident, tree class_ident)
|
||
{
|
||
tree underlying_class;
|
||
|
||
#ifdef OBJCPLUS
|
||
if (current_namespace != global_namespace) {
|
||
error ("Objective-C declarations may only appear in global scope");
|
||
}
|
||
#endif /* OBJCPLUS */
|
||
|
||
if (!(underlying_class = objc_is_class_name (class_ident)))
|
||
warning (0, "cannot find class %qs", IDENTIFIER_POINTER (class_ident));
|
||
else if (objc_is_class_name (alias_ident))
|
||
warning (0, "class %qs already exists", IDENTIFIER_POINTER (alias_ident));
|
||
else
|
||
{
|
||
/* Implement @compatibility_alias as a typedef. */
|
||
#ifdef OBJCPLUS
|
||
push_lang_context (lang_name_c); /* extern "C" */
|
||
#endif
|
||
lang_hooks.decls.pushdecl (build_decl
|
||
(TYPE_DECL,
|
||
alias_ident,
|
||
xref_tag (RECORD_TYPE, underlying_class)));
|
||
#ifdef OBJCPLUS
|
||
pop_lang_context ();
|
||
#endif
|
||
alias_chain = tree_cons (underlying_class, alias_ident, alias_chain);
|
||
}
|
||
}
|
||
|
||
void
|
||
objc_declare_class (tree ident_list)
|
||
{
|
||
tree list;
|
||
#ifdef OBJCPLUS
|
||
if (current_namespace != global_namespace) {
|
||
error ("Objective-C declarations may only appear in global scope");
|
||
}
|
||
#endif /* OBJCPLUS */
|
||
|
||
for (list = ident_list; list; list = TREE_CHAIN (list))
|
||
{
|
||
tree ident = TREE_VALUE (list);
|
||
|
||
if (! objc_is_class_name (ident))
|
||
{
|
||
tree record = lookup_name (ident), type = record;
|
||
|
||
if (record)
|
||
{
|
||
if (TREE_CODE (record) == TYPE_DECL)
|
||
type = DECL_ORIGINAL_TYPE (record);
|
||
|
||
if (!TYPE_HAS_OBJC_INFO (type)
|
||
|| !TYPE_OBJC_INTERFACE (type))
|
||
{
|
||
error ("%qs redeclared as different kind of symbol",
|
||
IDENTIFIER_POINTER (ident));
|
||
error ("previous declaration of %q+D",
|
||
record);
|
||
}
|
||
}
|
||
|
||
record = xref_tag (RECORD_TYPE, ident);
|
||
INIT_TYPE_OBJC_INFO (record);
|
||
TYPE_OBJC_INTERFACE (record) = ident;
|
||
class_chain = tree_cons (NULL_TREE, ident, class_chain);
|
||
}
|
||
}
|
||
}
|
||
|
||
tree
|
||
objc_is_class_name (tree ident)
|
||
{
|
||
tree chain;
|
||
|
||
if (ident && TREE_CODE (ident) == IDENTIFIER_NODE
|
||
&& identifier_global_value (ident))
|
||
ident = identifier_global_value (ident);
|
||
while (ident && TREE_CODE (ident) == TYPE_DECL && DECL_ORIGINAL_TYPE (ident))
|
||
ident = OBJC_TYPE_NAME (DECL_ORIGINAL_TYPE (ident));
|
||
|
||
if (ident && TREE_CODE (ident) == RECORD_TYPE)
|
||
ident = OBJC_TYPE_NAME (ident);
|
||
#ifdef OBJCPLUS
|
||
if (ident && TREE_CODE (ident) == TYPE_DECL)
|
||
ident = DECL_NAME (ident);
|
||
#endif
|
||
if (!ident || TREE_CODE (ident) != IDENTIFIER_NODE)
|
||
return NULL_TREE;
|
||
|
||
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;
|
||
}
|
||
|
||
/* Check whether TYPE is either 'id' or 'Class'. */
|
||
|
||
tree
|
||
objc_is_id (tree type)
|
||
{
|
||
if (type && TREE_CODE (type) == IDENTIFIER_NODE
|
||
&& identifier_global_value (type))
|
||
type = identifier_global_value (type);
|
||
|
||
if (type && TREE_CODE (type) == TYPE_DECL)
|
||
type = TREE_TYPE (type);
|
||
|
||
/* NB: This function may be called before the ObjC front-end has
|
||
been initialized, in which case OBJC_OBJECT_TYPE will (still) be NULL. */
|
||
return (objc_object_type && type
|
||
&& (IS_ID (type) || IS_CLASS (type) || IS_SUPER (type))
|
||
? type
|
||
: NULL_TREE);
|
||
}
|
||
|
||
/* Check whether TYPE is either 'id', 'Class', or a pointer to an ObjC
|
||
class instance. This is needed by other parts of the compiler to
|
||
handle ObjC types gracefully. */
|
||
|
||
tree
|
||
objc_is_object_ptr (tree type)
|
||
{
|
||
tree ret;
|
||
|
||
type = TYPE_MAIN_VARIANT (type);
|
||
if (!POINTER_TYPE_P (type))
|
||
return 0;
|
||
|
||
ret = objc_is_id (type);
|
||
if (!ret)
|
||
ret = objc_is_class_name (TREE_TYPE (type));
|
||
|
||
return ret;
|
||
}
|
||
|
||
static int
|
||
objc_is_gcable_type (tree type, int or_strong_p)
|
||
{
|
||
tree name;
|
||
|
||
if (!TYPE_P (type))
|
||
return 0;
|
||
if (objc_is_id (TYPE_MAIN_VARIANT (type)))
|
||
return 1;
|
||
if (or_strong_p && lookup_attribute ("objc_gc", TYPE_ATTRIBUTES (type)))
|
||
return 1;
|
||
if (TREE_CODE (type) != POINTER_TYPE && TREE_CODE (type) != INDIRECT_REF)
|
||
return 0;
|
||
type = TREE_TYPE (type);
|
||
if (TREE_CODE (type) != RECORD_TYPE)
|
||
return 0;
|
||
name = TYPE_NAME (type);
|
||
return (objc_is_class_name (name) != NULL_TREE);
|
||
}
|
||
|
||
static tree
|
||
objc_substitute_decl (tree expr, tree oldexpr, tree newexpr)
|
||
{
|
||
if (expr == oldexpr)
|
||
return newexpr;
|
||
|
||
switch (TREE_CODE (expr))
|
||
{
|
||
case COMPONENT_REF:
|
||
return objc_build_component_ref
|
||
(objc_substitute_decl (TREE_OPERAND (expr, 0),
|
||
oldexpr,
|
||
newexpr),
|
||
DECL_NAME (TREE_OPERAND (expr, 1)));
|
||
case ARRAY_REF:
|
||
return build_array_ref (objc_substitute_decl (TREE_OPERAND (expr, 0),
|
||
oldexpr,
|
||
newexpr),
|
||
TREE_OPERAND (expr, 1));
|
||
case INDIRECT_REF:
|
||
return build_indirect_ref (objc_substitute_decl (TREE_OPERAND (expr, 0),
|
||
oldexpr,
|
||
newexpr), "->");
|
||
default:
|
||
return expr;
|
||
}
|
||
}
|
||
|
||
static tree
|
||
objc_build_ivar_assignment (tree outervar, tree lhs, tree rhs)
|
||
{
|
||
tree func_params;
|
||
/* The LHS parameter contains the expression 'outervar->memberspec';
|
||
we need to transform it into '&((typeof(outervar) *) 0)->memberspec',
|
||
where memberspec may be arbitrarily complex (e.g., 'g->f.d[2].g[3]').
|
||
*/
|
||
tree offs
|
||
= objc_substitute_decl
|
||
(lhs, outervar, convert (TREE_TYPE (outervar), integer_zero_node));
|
||
tree func
|
||
= (flag_objc_direct_dispatch
|
||
? objc_assign_ivar_fast_decl
|
||
: objc_assign_ivar_decl);
|
||
|
||
offs = convert (integer_type_node, build_unary_op (ADDR_EXPR, offs, 0));
|
||
offs = fold (offs);
|
||
func_params = tree_cons (NULL_TREE,
|
||
convert (objc_object_type, rhs),
|
||
tree_cons (NULL_TREE, convert (objc_object_type, outervar),
|
||
tree_cons (NULL_TREE, offs,
|
||
NULL_TREE)));
|
||
|
||
assemble_external (func);
|
||
return build_function_call (func, func_params);
|
||
}
|
||
|
||
static tree
|
||
objc_build_global_assignment (tree lhs, tree rhs)
|
||
{
|
||
tree func_params = tree_cons (NULL_TREE,
|
||
convert (objc_object_type, rhs),
|
||
tree_cons (NULL_TREE, convert (build_pointer_type (objc_object_type),
|
||
build_unary_op (ADDR_EXPR, lhs, 0)),
|
||
NULL_TREE));
|
||
|
||
assemble_external (objc_assign_global_decl);
|
||
return build_function_call (objc_assign_global_decl, func_params);
|
||
}
|
||
|
||
static tree
|
||
objc_build_strong_cast_assignment (tree lhs, tree rhs)
|
||
{
|
||
tree func_params = tree_cons (NULL_TREE,
|
||
convert (objc_object_type, rhs),
|
||
tree_cons (NULL_TREE, convert (build_pointer_type (objc_object_type),
|
||
build_unary_op (ADDR_EXPR, lhs, 0)),
|
||
NULL_TREE));
|
||
|
||
assemble_external (objc_assign_strong_cast_decl);
|
||
return build_function_call (objc_assign_strong_cast_decl, func_params);
|
||
}
|
||
|
||
static int
|
||
objc_is_gcable_p (tree expr)
|
||
{
|
||
return (TREE_CODE (expr) == COMPONENT_REF
|
||
? objc_is_gcable_p (TREE_OPERAND (expr, 1))
|
||
: TREE_CODE (expr) == ARRAY_REF
|
||
? (objc_is_gcable_p (TREE_TYPE (expr))
|
||
|| objc_is_gcable_p (TREE_OPERAND (expr, 0)))
|
||
: TREE_CODE (expr) == ARRAY_TYPE
|
||
? objc_is_gcable_p (TREE_TYPE (expr))
|
||
: TYPE_P (expr)
|
||
? objc_is_gcable_type (expr, 1)
|
||
: (objc_is_gcable_p (TREE_TYPE (expr))
|
||
|| (DECL_P (expr)
|
||
&& lookup_attribute ("objc_gc", DECL_ATTRIBUTES (expr)))));
|
||
}
|
||
|
||
static int
|
||
objc_is_ivar_reference_p (tree expr)
|
||
{
|
||
return (TREE_CODE (expr) == ARRAY_REF
|
||
? objc_is_ivar_reference_p (TREE_OPERAND (expr, 0))
|
||
: TREE_CODE (expr) == COMPONENT_REF
|
||
? TREE_CODE (TREE_OPERAND (expr, 1)) == FIELD_DECL
|
||
: 0);
|
||
}
|
||
|
||
static int
|
||
objc_is_global_reference_p (tree expr)
|
||
{
|
||
return (TREE_CODE (expr) == INDIRECT_REF || TREE_CODE (expr) == PLUS_EXPR
|
||
? objc_is_global_reference_p (TREE_OPERAND (expr, 0))
|
||
: DECL_P (expr)
|
||
? (!DECL_CONTEXT (expr) || TREE_STATIC (expr))
|
||
: 0);
|
||
}
|
||
|
||
tree
|
||
objc_generate_write_barrier (tree lhs, enum tree_code modifycode, tree rhs)
|
||
{
|
||
tree result = NULL_TREE, outer;
|
||
int strong_cast_p = 0, outer_gc_p = 0, indirect_p = 0;
|
||
|
||
/* See if we have any lhs casts, and strip them out. NB: The lvalue casts
|
||
will have been transformed to the form '*(type *)&expr'. */
|
||
if (TREE_CODE (lhs) == INDIRECT_REF)
|
||
{
|
||
outer = TREE_OPERAND (lhs, 0);
|
||
|
||
while (!strong_cast_p
|
||
&& (TREE_CODE (outer) == CONVERT_EXPR
|
||
|| TREE_CODE (outer) == NOP_EXPR
|
||
|| TREE_CODE (outer) == NON_LVALUE_EXPR))
|
||
{
|
||
tree lhstype = TREE_TYPE (outer);
|
||
|
||
/* Descend down the cast chain, and record the first objc_gc
|
||
attribute found. */
|
||
if (POINTER_TYPE_P (lhstype))
|
||
{
|
||
tree attr
|
||
= lookup_attribute ("objc_gc",
|
||
TYPE_ATTRIBUTES (TREE_TYPE (lhstype)));
|
||
|
||
if (attr)
|
||
strong_cast_p = 1;
|
||
}
|
||
|
||
outer = TREE_OPERAND (outer, 0);
|
||
}
|
||
}
|
||
|
||
/* If we have a __strong cast, it trumps all else. */
|
||
if (strong_cast_p)
|
||
{
|
||
if (modifycode != NOP_EXPR)
|
||
goto invalid_pointer_arithmetic;
|
||
|
||
if (warn_assign_intercept)
|
||
warning (0, "strong-cast assignment has been intercepted");
|
||
|
||
result = objc_build_strong_cast_assignment (lhs, rhs);
|
||
|
||
goto exit_point;
|
||
}
|
||
|
||
/* the lhs must be of a suitable type, regardless of its underlying
|
||
structure. */
|
||
if (!objc_is_gcable_p (lhs))
|
||
goto exit_point;
|
||
|
||
outer = lhs;
|
||
|
||
while (outer
|
||
&& (TREE_CODE (outer) == COMPONENT_REF
|
||
|| TREE_CODE (outer) == ARRAY_REF))
|
||
outer = TREE_OPERAND (outer, 0);
|
||
|
||
if (TREE_CODE (outer) == INDIRECT_REF)
|
||
{
|
||
outer = TREE_OPERAND (outer, 0);
|
||
indirect_p = 1;
|
||
}
|
||
|
||
outer_gc_p = objc_is_gcable_p (outer);
|
||
|
||
/* Handle ivar assignments. */
|
||
if (objc_is_ivar_reference_p (lhs))
|
||
{
|
||
/* if the struct to the left of the ivar is not an Objective-C object (__strong
|
||
doesn't cut it here), the best we can do here is suggest a cast. */
|
||
if (!objc_is_gcable_type (TREE_TYPE (outer), 0))
|
||
{
|
||
/* We may still be able to use the global write barrier... */
|
||
if (!indirect_p && objc_is_global_reference_p (outer))
|
||
goto global_reference;
|
||
|
||
suggest_cast:
|
||
if (modifycode == NOP_EXPR)
|
||
{
|
||
if (warn_assign_intercept)
|
||
warning (0, "strong-cast may possibly be needed");
|
||
}
|
||
|
||
goto exit_point;
|
||
}
|
||
|
||
if (modifycode != NOP_EXPR)
|
||
goto invalid_pointer_arithmetic;
|
||
|
||
if (warn_assign_intercept)
|
||
warning (0, "instance variable assignment has been intercepted");
|
||
|
||
result = objc_build_ivar_assignment (outer, lhs, rhs);
|
||
|
||
goto exit_point;
|
||
}
|
||
|
||
/* Likewise, intercept assignment to global/static variables if their type is
|
||
GC-marked. */
|
||
if (objc_is_global_reference_p (outer))
|
||
{
|
||
if (indirect_p)
|
||
goto suggest_cast;
|
||
|
||
global_reference:
|
||
if (modifycode != NOP_EXPR)
|
||
{
|
||
invalid_pointer_arithmetic:
|
||
if (outer_gc_p)
|
||
warning (0, "pointer arithmetic for garbage-collected objects not allowed");
|
||
|
||
goto exit_point;
|
||
}
|
||
|
||
if (warn_assign_intercept)
|
||
warning (0, "global/static variable assignment has been intercepted");
|
||
|
||
result = objc_build_global_assignment (lhs, rhs);
|
||
}
|
||
|
||
/* In all other cases, fall back to the normal mechanism. */
|
||
exit_point:
|
||
return result;
|
||
}
|
||
|
||
struct interface_tuple GTY(())
|
||
{
|
||
tree id;
|
||
tree class_name;
|
||
};
|
||
|
||
static GTY ((param_is (struct interface_tuple))) htab_t interface_htab;
|
||
|
||
static hashval_t
|
||
hash_interface (const void *p)
|
||
{
|
||
const struct interface_tuple *d = p;
|
||
return IDENTIFIER_HASH_VALUE (d->id);
|
||
}
|
||
|
||
static int
|
||
eq_interface (const void *p1, const void *p2)
|
||
{
|
||
const struct interface_tuple *d = p1;
|
||
return d->id == p2;
|
||
}
|
||
|
||
static tree
|
||
lookup_interface (tree ident)
|
||
{
|
||
#ifdef OBJCPLUS
|
||
if (ident && TREE_CODE (ident) == TYPE_DECL)
|
||
ident = DECL_NAME (ident);
|
||
#endif
|
||
|
||
if (ident == NULL_TREE || TREE_CODE (ident) != IDENTIFIER_NODE)
|
||
return NULL_TREE;
|
||
|
||
{
|
||
struct interface_tuple **slot;
|
||
tree i = NULL_TREE;
|
||
|
||
if (interface_htab)
|
||
{
|
||
slot = (struct interface_tuple **)
|
||
htab_find_slot_with_hash (interface_htab, ident,
|
||
IDENTIFIER_HASH_VALUE (ident),
|
||
NO_INSERT);
|
||
if (slot && *slot)
|
||
i = (*slot)->class_name;
|
||
}
|
||
return i;
|
||
}
|
||
}
|
||
|
||
/* Implement @defs (<classname>) within struct bodies. */
|
||
|
||
tree
|
||
objc_get_class_ivars (tree class_name)
|
||
{
|
||
tree interface = lookup_interface (class_name);
|
||
|
||
if (interface)
|
||
return get_class_ivars (interface, true);
|
||
|
||
error ("cannot find interface declaration for %qs",
|
||
IDENTIFIER_POINTER (class_name));
|
||
|
||
return error_mark_node;
|
||
}
|
||
|
||
/* Used by: build_private_template, continue_class,
|
||
and for @defs constructs. */
|
||
|
||
static tree
|
||
get_class_ivars (tree interface, bool inherited)
|
||
{
|
||
tree ivar_chain = copy_list (CLASS_RAW_IVARS (interface));
|
||
|
||
/* Both CLASS_RAW_IVARS and CLASS_IVARS contain a list of ivars declared
|
||
by the current class (i.e., they do not include super-class ivars).
|
||
However, the CLASS_IVARS list will be side-effected by a call to
|
||
finish_struct(), which will fill in field offsets. */
|
||
if (!CLASS_IVARS (interface))
|
||
CLASS_IVARS (interface) = ivar_chain;
|
||
|
||
if (!inherited)
|
||
return ivar_chain;
|
||
|
||
while (CLASS_SUPER_NAME (interface))
|
||
{
|
||
/* Prepend super-class ivars. */
|
||
interface = lookup_interface (CLASS_SUPER_NAME (interface));
|
||
ivar_chain = chainon (copy_list (CLASS_RAW_IVARS (interface)),
|
||
ivar_chain);
|
||
}
|
||
|
||
return ivar_chain;
|
||
}
|
||
|
||
static tree
|
||
objc_create_temporary_var (tree type)
|
||
{
|
||
tree decl;
|
||
|
||
decl = build_decl (VAR_DECL, NULL_TREE, type);
|
||
TREE_USED (decl) = 1;
|
||
DECL_ARTIFICIAL (decl) = 1;
|
||
DECL_IGNORED_P (decl) = 1;
|
||
DECL_CONTEXT (decl) = current_function_decl;
|
||
|
||
return decl;
|
||
}
|
||
|
||
/* Exception handling constructs. We begin by having the parser do most
|
||
of the work and passing us blocks. What we do next depends on whether
|
||
we're doing "native" exception handling or legacy Darwin setjmp exceptions.
|
||
We abstract all of this in a handful of appropriately named routines. */
|
||
|
||
/* Stack of open try blocks. */
|
||
|
||
struct objc_try_context
|
||
{
|
||
struct objc_try_context *outer;
|
||
|
||
/* Statements (or statement lists) as processed by the parser. */
|
||
tree try_body;
|
||
tree finally_body;
|
||
|
||
/* Some file position locations. */
|
||
location_t try_locus;
|
||
location_t end_try_locus;
|
||
location_t end_catch_locus;
|
||
location_t finally_locus;
|
||
location_t end_finally_locus;
|
||
|
||
/* A STATEMENT_LIST of CATCH_EXPRs, appropriate for sticking into op1
|
||
of a TRY_CATCH_EXPR. Even when doing Darwin setjmp. */
|
||
tree catch_list;
|
||
|
||
/* The CATCH_EXPR of an open @catch clause. */
|
||
tree current_catch;
|
||
|
||
/* The VAR_DECL holding the Darwin equivalent of EXC_PTR_EXPR. */
|
||
tree caught_decl;
|
||
tree stack_decl;
|
||
tree rethrow_decl;
|
||
};
|
||
|
||
static struct objc_try_context *cur_try_context;
|
||
|
||
/* This hook, called via lang_eh_runtime_type, generates a runtime object
|
||
that represents TYPE. For Objective-C, this is just the class name. */
|
||
/* ??? Isn't there a class object or some such? Is it easy to get? */
|
||
|
||
#ifndef OBJCPLUS
|
||
static tree
|
||
objc_eh_runtime_type (tree type)
|
||
{
|
||
return add_objc_string (OBJC_TYPE_NAME (TREE_TYPE (type)), class_names);
|
||
}
|
||
#endif
|
||
|
||
/* Initialize exception handling. */
|
||
|
||
static void
|
||
objc_init_exceptions (void)
|
||
{
|
||
static bool done = false;
|
||
if (done)
|
||
return;
|
||
done = true;
|
||
|
||
if (flag_objc_sjlj_exceptions)
|
||
{
|
||
/* On Darwin, ObjC exceptions require a sufficiently recent
|
||
version of the runtime, so the user must ask for them explicitly. */
|
||
if (!flag_objc_exceptions)
|
||
warning (0, "use %<-fobjc-exceptions%> to enable Objective-C "
|
||
"exception syntax");
|
||
}
|
||
#ifndef OBJCPLUS
|
||
else
|
||
{
|
||
c_eh_initialized_p = true;
|
||
eh_personality_libfunc
|
||
= init_one_libfunc (USING_SJLJ_EXCEPTIONS
|
||
? "__gnu_objc_personality_sj0"
|
||
: "__gnu_objc_personality_v0");
|
||
default_init_unwind_resume_libfunc ();
|
||
using_eh_for_cleanups ();
|
||
lang_eh_runtime_type = objc_eh_runtime_type;
|
||
}
|
||
#endif
|
||
}
|
||
|
||
/* Build an EXC_PTR_EXPR, 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 (void)
|
||
{
|
||
if (flag_objc_sjlj_exceptions)
|
||
{
|
||
tree var = cur_try_context->caught_decl;
|
||
if (!var)
|
||
{
|
||
var = objc_create_temporary_var (objc_object_type);
|
||
cur_try_context->caught_decl = var;
|
||
}
|
||
return var;
|
||
}
|
||
else
|
||
return build0 (EXC_PTR_EXPR, objc_object_type);
|
||
}
|
||
|
||
/* Build "objc_exception_try_exit(&_stack)". */
|
||
|
||
static tree
|
||
next_sjlj_build_try_exit (void)
|
||
{
|
||
tree t;
|
||
t = build_fold_addr_expr (cur_try_context->stack_decl);
|
||
t = tree_cons (NULL, t, NULL);
|
||
t = build_function_call (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 (void)
|
||
{
|
||
tree t, enter, sj, cond;
|
||
|
||
t = build_fold_addr_expr (cur_try_context->stack_decl);
|
||
t = tree_cons (NULL, t, NULL);
|
||
enter = build_function_call (objc_exception_try_enter_decl, t);
|
||
|
||
t = objc_build_component_ref (cur_try_context->stack_decl,
|
||
get_identifier ("buf"));
|
||
t = build_fold_addr_expr (t);
|
||
#ifdef OBJCPLUS
|
||
/* Convert _setjmp argument to type that is expected. */
|
||
if (TYPE_ARG_TYPES (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 (objc_setjmp_decl, t);
|
||
|
||
cond = build2 (COMPOUND_EXPR, TREE_TYPE (sj), enter, sj);
|
||
cond = c_common_truthvalue_conversion (cond);
|
||
|
||
return build3 (COND_EXPR, void_type_node, cond, NULL, NULL);
|
||
}
|
||
|
||
/* Build:
|
||
|
||
DECL = objc_exception_extract(&_stack); */
|
||
|
||
static tree
|
||
next_sjlj_build_exc_extract (tree decl)
|
||
{
|
||
tree t;
|
||
|
||
t = build_fold_addr_expr (cur_try_context->stack_decl);
|
||
t = tree_cons (NULL, t, NULL);
|
||
t = build_function_call (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 (void)
|
||
{
|
||
tree_stmt_iterator i = tsi_start (cur_try_context->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 == NULL)
|
||
{
|
||
*last = body;
|
||
saw_id = true;
|
||
break;
|
||
}
|
||
else
|
||
{
|
||
tree args, cond;
|
||
|
||
if (type == error_mark_node)
|
||
cond = error_mark_node;
|
||
else
|
||
{
|
||
args = tree_cons (NULL, cur_try_context->caught_decl, NULL);
|
||
t = objc_get_class_reference (OBJC_TYPE_NAME (TREE_TYPE (type)));
|
||
args = tree_cons (NULL, t, args);
|
||
t = build_function_call (objc_exception_match_decl, args);
|
||
cond = c_common_truthvalue_conversion (t);
|
||
}
|
||
t = build3 (COND_EXPR, void_type_node, cond, body, NULL);
|
||
SET_EXPR_LOCUS (t, EXPR_LOCUS (stmt));
|
||
|
||
*last = t;
|
||
last = &COND_EXPR_ELSE (t);
|
||
}
|
||
}
|
||
|
||
if (!saw_id)
|
||
{
|
||
t = build2 (MODIFY_EXPR, void_type_node, cur_try_context->rethrow_decl,
|
||
cur_try_context->caught_decl);
|
||
SET_EXPR_LOCATION (t, cur_try_context->end_catch_locus);
|
||
append_to_statement_list (t, last);
|
||
|
||
t = next_sjlj_build_try_exit ();
|
||
SET_EXPR_LOCATION (t, cur_try_context->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 (void)
|
||
{
|
||
tree rethrow_decl, stack_decl, t;
|
||
tree catch_seq, try_fin, bind;
|
||
|
||
/* Create the declarations involved. */
|
||
t = xref_tag (RECORD_TYPE, get_identifier (UTAG_EXCDATA));
|
||
stack_decl = objc_create_temporary_var (t);
|
||
cur_try_context->stack_decl = stack_decl;
|
||
|
||
rethrow_decl = objc_create_temporary_var (objc_object_type);
|
||
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 ();
|
||
catch_seq = build_stmt (BIND_EXPR, caught_decl, NULL, NULL);
|
||
TREE_SIDE_EFFECTS (catch_seq) = 1;
|
||
|
||
t = next_sjlj_build_exc_extract (caught_decl);
|
||
append_to_statement_list (t, &BIND_EXPR_BODY (catch_seq));
|
||
|
||
t = next_sjlj_build_enter_and_setjmp ();
|
||
COND_EXPR_THEN (t) = next_sjlj_build_exc_extract (rethrow_decl);
|
||
COND_EXPR_ELSE (t) = next_sjlj_build_catch_list ();
|
||
append_to_statement_list (t, &BIND_EXPR_BODY (catch_seq));
|
||
}
|
||
else
|
||
catch_seq = next_sjlj_build_exc_extract (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 ();
|
||
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 ();
|
||
t = build_stmt (COND_EXPR,
|
||
c_common_truthvalue_conversion (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 (objc_exception_throw_decl, t);
|
||
t = build_stmt (COND_EXPR,
|
||
c_common_truthvalue_conversion (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;
|
||
}
|
||
|
||
/* Called just after parsing the @try and its associated BODY. We now
|
||
must prepare for the tricky bits -- handling the catches and finally. */
|
||
|
||
void
|
||
objc_begin_try_stmt (location_t try_locus, tree body)
|
||
{
|
||
struct objc_try_context *c = xcalloc (1, sizeof (*c));
|
||
c->outer = cur_try_context;
|
||
c->try_body = body;
|
||
c->try_locus = try_locus;
|
||
c->end_try_locus = input_location;
|
||
cur_try_context = c;
|
||
|
||
objc_init_exceptions ();
|
||
|
||
if (flag_objc_sjlj_exceptions)
|
||
objc_mark_locals_volatile (NULL);
|
||
}
|
||
|
||
/* Called just after parsing "@catch (parm)". Open a binding level,
|
||
enter DECL into the binding level, and initialize it. Leave the
|
||
binding level open while the body of the compound statement is parsed. */
|
||
|
||
void
|
||
objc_begin_catch_clause (tree decl)
|
||
{
|
||
tree compound, type, t;
|
||
|
||
/* Begin a new scope that the entire catch clause will live in. */
|
||
compound = c_begin_compound_stmt (true);
|
||
|
||
/* The parser passed in a PARM_DECL, but what we really want is a VAR_DECL. */
|
||
decl = build_decl (VAR_DECL, DECL_NAME (decl), TREE_TYPE (decl));
|
||
lang_hooks.decls.pushdecl (decl);
|
||
|
||
/* Since a decl is required here by syntax, don't warn if its unused. */
|
||
/* ??? As opposed to __attribute__((unused))? Anyway, this appears to
|
||
be what the previous objc implementation did. */
|
||
TREE_USED (decl) = 1;
|
||
|
||
/* Verify that the type of the catch is valid. It must be a pointer
|
||
to an Objective-C class, or "id" (which is catch-all). */
|
||
type = TREE_TYPE (decl);
|
||
|
||
if (POINTER_TYPE_P (type) && objc_is_object_id (TREE_TYPE (type)))
|
||
type = NULL;
|
||
else if (!POINTER_TYPE_P (type) || !TYPED_OBJECT (TREE_TYPE (type)))
|
||
{
|
||
error ("@catch parameter is not a known Objective-C class type");
|
||
type = error_mark_node;
|
||
}
|
||
else if (cur_try_context->catch_list)
|
||
{
|
||
/* Examine previous @catch clauses and see if we've already
|
||
caught the type in question. */
|
||
tree_stmt_iterator i = tsi_start (cur_try_context->catch_list);
|
||
for (; !tsi_end_p (i); tsi_next (&i))
|
||
{
|
||
tree stmt = tsi_stmt (i);
|
||
t = CATCH_TYPES (stmt);
|
||
if (t == error_mark_node)
|
||
continue;
|
||
if (!t || DERIVED_FROM_P (TREE_TYPE (t), TREE_TYPE (type)))
|
||
{
|
||
warning (0, "exception of type %<%T%> will be caught",
|
||
TREE_TYPE (type));
|
||
warning (0, "%H by earlier handler for %<%T%>",
|
||
EXPR_LOCUS (stmt), TREE_TYPE (t ? t : objc_object_type));
|
||
break;
|
||
}
|
||
}
|
||
}
|
||
|
||
/* Record the data for the catch in the try context so that we can
|
||
finalize it later. */
|
||
t = build_stmt (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 ();
|
||
t = convert (TREE_TYPE (decl), t);
|
||
t = build2 (MODIFY_EXPR, void_type_node, decl, t);
|
||
add_stmt (t);
|
||
}
|
||
|
||
/* Called just after parsing the closing brace of a @catch clause. Close
|
||
the open binding level, and record a CATCH_EXPR for it. */
|
||
|
||
void
|
||
objc_finish_catch_clause (void)
|
||
{
|
||
tree c = cur_try_context->current_catch;
|
||
cur_try_context->current_catch = NULL;
|
||
cur_try_context->end_catch_locus = input_location;
|
||
|
||
CATCH_BODY (c) = c_end_compound_stmt (CATCH_BODY (c), 1);
|
||
append_to_statement_list (c, &cur_try_context->catch_list);
|
||
}
|
||
|
||
/* Called after parsing a @finally clause and its associated BODY.
|
||
Record the body for later placement. */
|
||
|
||
void
|
||
objc_build_finally_clause (location_t finally_locus, tree body)
|
||
{
|
||
cur_try_context->finally_body = body;
|
||
cur_try_context->finally_locus = finally_locus;
|
||
cur_try_context->end_finally_locus = input_location;
|
||
}
|
||
|
||
/* Called to finalize a @try construct. */
|
||
|
||
tree
|
||
objc_finish_try_stmt (void)
|
||
{
|
||
struct objc_try_context *c = cur_try_context;
|
||
tree stmt;
|
||
|
||
if (c->catch_list == NULL && c->finally_body == NULL)
|
||
error ("%<@try%> without %<@catch%> or %<@finally%>");
|
||
|
||
/* If we're doing Darwin setjmp exceptions, build the big nasty. */
|
||
if (flag_objc_sjlj_exceptions)
|
||
{
|
||
if (!cur_try_context->finally_body)
|
||
{
|
||
cur_try_context->finally_locus = input_location;
|
||
cur_try_context->end_finally_locus = input_location;
|
||
}
|
||
stmt = next_sjlj_build_try_catch_finally ();
|
||
}
|
||
else
|
||
{
|
||
/* Otherwise, nest the CATCH inside a FINALLY. */
|
||
stmt = c->try_body;
|
||
if (c->catch_list)
|
||
{
|
||
stmt = build_stmt (TRY_CATCH_EXPR, stmt, c->catch_list);
|
||
SET_EXPR_LOCATION (stmt, cur_try_context->try_locus);
|
||
}
|
||
if (c->finally_body)
|
||
{
|
||
stmt = build_stmt (TRY_FINALLY_EXPR, stmt, c->finally_body);
|
||
SET_EXPR_LOCATION (stmt, cur_try_context->try_locus);
|
||
}
|
||
}
|
||
add_stmt (stmt);
|
||
|
||
cur_try_context = c->outer;
|
||
free (c);
|
||
return stmt;
|
||
}
|
||
|
||
tree
|
||
objc_build_throw_stmt (tree throw_expr)
|
||
{
|
||
tree args;
|
||
|
||
objc_init_exceptions ();
|
||
|
||
if (throw_expr == NULL)
|
||
{
|
||
/* If we're not inside a @catch block, there is no "current
|
||
exception" to be rethrown. */
|
||
if (cur_try_context == NULL
|
||
|| cur_try_context->current_catch == NULL)
|
||
{
|
||
error ("%<@throw%> (rethrow) used outside of a @catch block");
|
||
return NULL_TREE;
|
||
}
|
||
|
||
/* Otherwise the object is still sitting in the EXC_PTR_EXPR
|
||
value that we get from the runtime. */
|
||
throw_expr = objc_build_exc_ptr ();
|
||
}
|
||
|
||
/* A throw is just a call to the runtime throw function with the
|
||
object as a parameter. */
|
||
args = tree_cons (NULL, throw_expr, NULL);
|
||
return add_stmt (build_function_call (objc_exception_throw_decl, args));
|
||
}
|
||
|
||
tree
|
||
objc_build_synchronized (location_t start_locus, tree mutex, tree body)
|
||
{
|
||
tree args, call;
|
||
|
||
/* First lock the mutex. */
|
||
mutex = save_expr (mutex);
|
||
args = tree_cons (NULL, mutex, NULL);
|
||
call = build_function_call (objc_sync_enter_decl, args);
|
||
SET_EXPR_LOCATION (call, start_locus);
|
||
add_stmt (call);
|
||
|
||
/* Build the mutex unlock. */
|
||
args = tree_cons (NULL, mutex, NULL);
|
||
call = build_function_call (objc_sync_exit_decl, args);
|
||
SET_EXPR_LOCATION (call, input_location);
|
||
|
||
/* Put the that and the body in a TRY_FINALLY. */
|
||
objc_begin_try_stmt (start_locus, body);
|
||
objc_build_finally_clause (input_location, call);
|
||
return objc_finish_try_stmt ();
|
||
}
|
||
|
||
|
||
/* 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 field_decl, field_decl_chain, index, temp_type;
|
||
|
||
objc_exception_data_template
|
||
= start_struct (RECORD_TYPE, get_identifier (UTAG_EXCDATA));
|
||
|
||
/* int buf[OBJC_JBLEN]; */
|
||
|
||
index = build_index_type (build_int_cst (NULL_TREE, OBJC_JBLEN - 1));
|
||
field_decl = create_field_decl (build_array_type (integer_type_node, index),
|
||
"buf");
|
||
field_decl_chain = field_decl;
|
||
|
||
/* void *pointers[4]; */
|
||
|
||
index = build_index_type (build_int_cst (NULL_TREE, 4 - 1));
|
||
field_decl = create_field_decl (build_array_type (ptr_type_node, index),
|
||
"pointers");
|
||
chainon (field_decl_chain, field_decl);
|
||
|
||
finish_struct (objc_exception_data_template, field_decl_chain, NULL_TREE);
|
||
|
||
/* int _setjmp(...); */
|
||
/* If the user includes <setjmp.h>, this shall be superseded by
|
||
'int _setjmp(jmp_buf);' */
|
||
temp_type = build_function_type (integer_type_node, NULL_TREE);
|
||
objc_setjmp_decl
|
||
= 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 (objc_object_type,
|
||
tree_cons (NULL_TREE,
|
||
build_pointer_type (objc_exception_data_template),
|
||
OBJC_VOID_AT_END));
|
||
objc_exception_extract_decl
|
||
= 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 (void_type_node,
|
||
tree_cons (NULL_TREE,
|
||
build_pointer_type (objc_exception_data_template),
|
||
OBJC_VOID_AT_END));
|
||
objc_exception_try_enter_decl
|
||
= builtin_function (TAG_EXCEPTIONTRYENTER, temp_type, 0, NOT_BUILT_IN, NULL, NULL_TREE);
|
||
objc_exception_try_exit_decl
|
||
= builtin_function (TAG_EXCEPTIONTRYEXIT, temp_type, 0, NOT_BUILT_IN, NULL, NULL_TREE);
|
||
|
||
/* int objc_exception_match(id, id); */
|
||
temp_type
|
||
= build_function_type (integer_type_node,
|
||
tree_cons (NULL_TREE, objc_object_type,
|
||
tree_cons (NULL_TREE, objc_object_type,
|
||
OBJC_VOID_AT_END)));
|
||
objc_exception_match_decl
|
||
= 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 (objc_object_type,
|
||
tree_cons
|
||
(NULL_TREE, objc_object_type,
|
||
tree_cons (NULL_TREE, objc_object_type,
|
||
tree_cons (NULL_TREE,
|
||
unsigned_type_node,
|
||
OBJC_VOID_AT_END))));
|
||
objc_assign_ivar_decl
|
||
= builtin_function (TAG_ASSIGNIVAR, temp_type, 0, NOT_BUILT_IN,
|
||
NULL, NULL_TREE);
|
||
#ifdef OFFS_ASSIGNIVAR_FAST
|
||
objc_assign_ivar_fast_decl
|
||
= 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 (objc_object_type,
|
||
tree_cons (NULL_TREE, objc_object_type,
|
||
tree_cons (NULL_TREE, build_pointer_type (objc_object_type),
|
||
OBJC_VOID_AT_END)));
|
||
objc_assign_global_decl
|
||
= builtin_function (TAG_ASSIGNGLOBAL, temp_type, 0, NOT_BUILT_IN, NULL, NULL_TREE);
|
||
objc_assign_strong_cast_decl
|
||
= builtin_function (TAG_ASSIGNSTRONGCAST, temp_type, 0, NOT_BUILT_IN, NULL, NULL_TREE);
|
||
}
|
||
|
||
static void
|
||
build_objc_exception_stuff (void)
|
||
{
|
||
tree noreturn_list, nothrow_list, temp_type;
|
||
|
||
noreturn_list = tree_cons (get_identifier ("noreturn"), NULL, NULL);
|
||
nothrow_list = tree_cons (get_identifier ("nothrow"), NULL, NULL);
|
||
|
||
/* void objc_exception_throw(id) __attribute__((noreturn)); */
|
||
/* void objc_sync_enter(id); */
|
||
/* void objc_sync_exit(id); */
|
||
temp_type = build_function_type (void_type_node,
|
||
tree_cons (NULL_TREE, objc_object_type,
|
||
OBJC_VOID_AT_END));
|
||
objc_exception_throw_decl
|
||
= builtin_function (TAG_EXCEPTIONTHROW, temp_type, 0, NOT_BUILT_IN, NULL,
|
||
noreturn_list);
|
||
objc_sync_enter_decl
|
||
= builtin_function (TAG_SYNCENTER, temp_type, 0, NOT_BUILT_IN,
|
||
NULL, nothrow_list);
|
||
objc_sync_exit_decl
|
||
= builtin_function (TAG_SYNCEXIT, temp_type, 0, NOT_BUILT_IN,
|
||
NULL, nothrow_list);
|
||
}
|
||
|
||
/* Construct a C struct corresponding to ObjC class CLASS, with the same
|
||
name as the class:
|
||
|
||
struct <classname> {
|
||
struct _objc_class *isa;
|
||
...
|
||
}; */
|
||
|
||
static void
|
||
build_private_template (tree class)
|
||
{
|
||
if (!CLASS_STATIC_TEMPLATE (class))
|
||
{
|
||
tree record = objc_build_struct (class,
|
||
get_class_ivars (class, false),
|
||
CLASS_SUPER_NAME (class));
|
||
|
||
/* Set the TREE_USED bit for this struct, so that stab generator
|
||
can emit stabs for this struct type. */
|
||
if (flag_debug_only_used_symbols && TYPE_STUB_DECL (record))
|
||
TREE_USED (TYPE_STUB_DECL (record)) = 1;
|
||
}
|
||
}
|
||
|
||
/* Begin code generation for protocols... */
|
||
|
||
/* struct _objc_protocol {
|
||
struct _objc_class *isa;
|
||
char *protocol_name;
|
||
struct _objc_protocol **protocol_list;
|
||
struct _objc__method_prototype_list *instance_methods;
|
||
struct _objc__method_prototype_list *class_methods;
|
||
}; */
|
||
|
||
static void
|
||
build_protocol_template (void)
|
||
{
|
||
tree field_decl, field_decl_chain;
|
||
|
||
objc_protocol_template = start_struct (RECORD_TYPE,
|
||
get_identifier (UTAG_PROTOCOL));
|
||
|
||
/* struct _objc_class *isa; */
|
||
field_decl = create_field_decl (build_pointer_type
|
||
(xref_tag (RECORD_TYPE,
|
||
get_identifier (UTAG_CLASS))),
|
||
"isa");
|
||
field_decl_chain = field_decl;
|
||
|
||
/* char *protocol_name; */
|
||
field_decl = create_field_decl (string_type_node, "protocol_name");
|
||
chainon (field_decl_chain, field_decl);
|
||
|
||
/* struct _objc_protocol **protocol_list; */
|
||
field_decl = create_field_decl (build_pointer_type
|
||
(build_pointer_type
|
||
(objc_protocol_template)),
|
||
"protocol_list");
|
||
chainon (field_decl_chain, field_decl);
|
||
|
||
/* struct _objc__method_prototype_list *instance_methods; */
|
||
field_decl = create_field_decl (objc_method_proto_list_ptr,
|
||
"instance_methods");
|
||
chainon (field_decl_chain, field_decl);
|
||
|
||
/* struct _objc__method_prototype_list *class_methods; */
|
||
field_decl = create_field_decl (objc_method_proto_list_ptr,
|
||
"class_methods");
|
||
chainon (field_decl_chain, field_decl);
|
||
|
||
finish_struct (objc_protocol_template, field_decl_chain, NULL_TREE);
|
||
}
|
||
|
||
static tree
|
||
build_descriptor_table_initializer (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,
|
||
objc_build_constructor (type, nreverse (eltlist)),
|
||
initlist);
|
||
|
||
entries = TREE_CHAIN (entries);
|
||
}
|
||
while (entries);
|
||
|
||
return objc_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 (tree list_type, int size)
|
||
{
|
||
tree objc_ivar_list_record;
|
||
tree field_decl, field_decl_chain;
|
||
|
||
/* Generate an unnamed struct definition. */
|
||
|
||
objc_ivar_list_record = start_struct (RECORD_TYPE, NULL_TREE);
|
||
|
||
/* int method_count; */
|
||
field_decl = create_field_decl (integer_type_node, "method_count");
|
||
field_decl_chain = field_decl;
|
||
|
||
/* struct objc_method method_list[]; */
|
||
field_decl = create_field_decl (build_array_type
|
||
(list_type,
|
||
build_index_type
|
||
(build_int_cst (NULL_TREE, size - 1))),
|
||
"method_list");
|
||
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 (void)
|
||
{
|
||
tree proto_record;
|
||
tree field_decl, field_decl_chain;
|
||
|
||
proto_record
|
||
= start_struct (RECORD_TYPE, get_identifier (UTAG_METHOD_PROTOTYPE));
|
||
|
||
/* SEL _cmd; */
|
||
field_decl = create_field_decl (objc_selector_type, "_cmd");
|
||
field_decl_chain = field_decl;
|
||
|
||
/* char *method_types; */
|
||
field_decl = create_field_decl (string_type_node, "method_types");
|
||
chainon (field_decl_chain, field_decl);
|
||
|
||
finish_struct (proto_record, field_decl_chain, NULL_TREE);
|
||
|
||
return proto_record;
|
||
}
|
||
|
||
static tree
|
||
objc_method_parm_type (tree type)
|
||
{
|
||
type = TREE_VALUE (TREE_TYPE (type));
|
||
if (TREE_CODE (type) == TYPE_DECL)
|
||
type = TREE_TYPE (type);
|
||
return type;
|
||
}
|
||
|
||
static int
|
||
objc_encoded_type_size (tree type)
|
||
{
|
||
int sz = int_size_in_bytes (type);
|
||
|
||
/* Make all integer and enum types at least as large
|
||
as an int. */
|
||
if (sz > 0 && INTEGRAL_TYPE_P (type))
|
||
sz = MAX (sz, int_size_in_bytes (integer_type_node));
|
||
/* Treat arrays as pointers, since that's how they're
|
||
passed in. */
|
||
else if (TREE_CODE (type) == ARRAY_TYPE)
|
||
sz = int_size_in_bytes (ptr_type_node);
|
||
return sz;
|
||
}
|
||
|
||
static tree
|
||
encode_method_prototype (tree method_decl)
|
||
{
|
||
tree parms;
|
||
int parm_offset, i;
|
||
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)));
|
||
|
||
/* Encode return type. */
|
||
encode_type (objc_method_parm_type (method_decl),
|
||
obstack_object_size (&util_obstack),
|
||
OBJC_ENCODE_INLINE_DEFS);
|
||
|
||
/* Stack size. */
|
||
/* The first two arguments (self and _cmd) are pointers; account for
|
||
their size. */
|
||
i = int_size_in_bytes (ptr_type_node);
|
||
parm_offset = 2 * i;
|
||
for (parms = METHOD_SEL_ARGS (method_decl); parms;
|
||
parms = TREE_CHAIN (parms))
|
||
{
|
||
tree type = objc_method_parm_type (parms);
|
||
int sz = objc_encoded_type_size (type);
|
||
|
||
/* If a type size is not known, bail out. */
|
||
if (sz < 0)
|
||
{
|
||
error ("type %q+D does not have a known size",
|
||
type);
|
||
/* Pretend that the encoding succeeded; the compilation will
|
||
fail nevertheless. */
|
||
goto finish_encoding;
|
||
}
|
||
parm_offset += sz;
|
||
}
|
||
|
||
sprintf (buf, "%d@0:%d", parm_offset, i);
|
||
obstack_grow (&util_obstack, buf, strlen (buf));
|
||
|
||
/* Argument types. */
|
||
parm_offset = 2 * i;
|
||
for (parms = METHOD_SEL_ARGS (method_decl); parms;
|
||
parms = TREE_CHAIN (parms))
|
||
{
|
||
tree type = objc_method_parm_type (parms);
|
||
|
||
/* Process argument qualifiers for user supplied arguments. */
|
||
encode_type_qualifiers (TREE_PURPOSE (TREE_TYPE (parms)));
|
||
|
||
/* Type. */
|
||
encode_type (type, obstack_object_size (&util_obstack),
|
||
OBJC_ENCODE_INLINE_DEFS);
|
||
|
||
/* Compute offset. */
|
||
sprintf (buf, "%d", parm_offset);
|
||
parm_offset += objc_encoded_type_size (type);
|
||
|
||
obstack_grow (&util_obstack, buf, strlen (buf));
|
||
}
|
||
|
||
finish_encoding:
|
||
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 (tree type, const char *name, int size, tree list,
|
||
tree proto)
|
||
{
|
||
tree decl, initlist;
|
||
|
||
decl = start_var_decl (type, synth_id_with_class_suffix (name, proto));
|
||
|
||
initlist = build_tree_list (NULL_TREE, build_int_cst (NULL_TREE, size));
|
||
initlist = tree_cons (NULL_TREE, list, initlist);
|
||
|
||
finish_var_decl (decl, objc_build_constructor (type, nreverse (initlist)));
|
||
|
||
return decl;
|
||
}
|
||
|
||
static void
|
||
generate_method_descriptors (tree protocol)
|
||
{
|
||
tree initlist, chain, method_list_template;
|
||
int size;
|
||
|
||
if (!objc_method_prototype_template)
|
||
objc_method_prototype_template = build_method_prototype_template ();
|
||
|
||
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);
|
||
}
|
||
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);
|
||
}
|
||
else
|
||
UOBJC_INSTANCE_METHODS_decl = 0;
|
||
}
|
||
|
||
static void
|
||
generate_protocol_references (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));
|
||
}
|
||
}
|
||
}
|
||
|
||
/* Generate either '- .cxx_construct' or '- .cxx_destruct' for the
|
||
current class. */
|
||
#ifdef OBJCPLUS
|
||
static void
|
||
objc_generate_cxx_ctor_or_dtor (bool dtor)
|
||
{
|
||
tree fn, body, compound_stmt, ivar;
|
||
|
||
/* - (id) .cxx_construct { ... return self; } */
|
||
/* - (void) .cxx_construct { ... } */
|
||
|
||
objc_set_method_type (MINUS_EXPR);
|
||
objc_start_method_definition
|
||
(objc_build_method_signature (build_tree_list (NULL_TREE,
|
||
dtor
|
||
? void_type_node
|
||
: objc_object_type),
|
||
get_identifier (dtor
|
||
? TAG_CXX_DESTRUCT
|
||
: TAG_CXX_CONSTRUCT),
|
||
make_node (TREE_LIST),
|
||
false));
|
||
body = begin_function_body ();
|
||
compound_stmt = begin_compound_stmt (0);
|
||
|
||
ivar = CLASS_IVARS (implementation_template);
|
||
/* Destroy ivars in reverse order. */
|
||
if (dtor)
|
||
ivar = nreverse (copy_list (ivar));
|
||
|
||
for (; ivar; ivar = TREE_CHAIN (ivar))
|
||
{
|
||
if (TREE_CODE (ivar) == FIELD_DECL)
|
||
{
|
||
tree type = TREE_TYPE (ivar);
|
||
|
||
/* Call the ivar's default constructor or destructor. Do not
|
||
call the destructor unless a corresponding constructor call
|
||
has also been made (or is not needed). */
|
||
if (IS_AGGR_TYPE (type)
|
||
&& (dtor
|
||
? (TYPE_HAS_NONTRIVIAL_DESTRUCTOR (type)
|
||
&& (!TYPE_NEEDS_CONSTRUCTING (type)
|
||
|| TYPE_HAS_DEFAULT_CONSTRUCTOR (type)))
|
||
: (TYPE_NEEDS_CONSTRUCTING (type)
|
||
&& TYPE_HAS_DEFAULT_CONSTRUCTOR (type))))
|
||
finish_expr_stmt
|
||
(build_special_member_call
|
||
(build_ivar_reference (DECL_NAME (ivar)),
|
||
dtor ? complete_dtor_identifier : complete_ctor_identifier,
|
||
NULL_TREE, type, LOOKUP_NORMAL));
|
||
}
|
||
}
|
||
|
||
/* The constructor returns 'self'. */
|
||
if (!dtor)
|
||
finish_return_stmt (self_decl);
|
||
|
||
finish_compound_stmt (compound_stmt);
|
||
finish_function_body (body);
|
||
fn = current_function_decl;
|
||
finish_function ();
|
||
objc_finish_method_definition (fn);
|
||
}
|
||
|
||
/* The following routine will examine the current @interface for any
|
||
non-POD C++ ivars requiring non-trivial construction and/or
|
||
destruction, and then synthesize special '- .cxx_construct' and/or
|
||
'- .cxx_destruct' methods which will run the appropriate
|
||
construction or destruction code. Note that ivars inherited from
|
||
super-classes are _not_ considered. */
|
||
static void
|
||
objc_generate_cxx_cdtors (void)
|
||
{
|
||
bool need_ctor = false, need_dtor = false;
|
||
tree ivar;
|
||
|
||
/* We do not want to do this for categories, since they do not have
|
||
their own ivars. */
|
||
|
||
if (TREE_CODE (objc_implementation_context) != CLASS_IMPLEMENTATION_TYPE)
|
||
return;
|
||
|
||
/* First, determine if we even need a constructor and/or destructor. */
|
||
|
||
for (ivar = CLASS_IVARS (implementation_template); ivar;
|
||
ivar = TREE_CHAIN (ivar))
|
||
{
|
||
if (TREE_CODE (ivar) == FIELD_DECL)
|
||
{
|
||
tree type = TREE_TYPE (ivar);
|
||
|
||
if (IS_AGGR_TYPE (type))
|
||
{
|
||
if (TYPE_NEEDS_CONSTRUCTING (type)
|
||
&& TYPE_HAS_DEFAULT_CONSTRUCTOR (type))
|
||
/* NB: If a default constructor is not available, we will not
|
||
be able to initialize this ivar; the add_instance_variable()
|
||
routine will already have warned about this. */
|
||
need_ctor = true;
|
||
|
||
if (TYPE_HAS_NONTRIVIAL_DESTRUCTOR (type)
|
||
&& (!TYPE_NEEDS_CONSTRUCTING (type)
|
||
|| TYPE_HAS_DEFAULT_CONSTRUCTOR (type)))
|
||
/* NB: If a default constructor is not available, we will not
|
||
call the destructor either, for symmetry. */
|
||
need_dtor = true;
|
||
}
|
||
}
|
||
}
|
||
|
||
/* Generate '- .cxx_construct' if needed. */
|
||
|
||
if (need_ctor)
|
||
objc_generate_cxx_ctor_or_dtor (false);
|
||
|
||
/* Generate '- .cxx_destruct' if needed. */
|
||
|
||
if (need_dtor)
|
||
objc_generate_cxx_ctor_or_dtor (true);
|
||
|
||
/* The 'imp_list' variable points at an imp_entry record for the current
|
||
@implementation. Record the existence of '- .cxx_construct' and/or
|
||
'- .cxx_destruct' methods therein; it will be included in the
|
||
metadata for the class. */
|
||
if (flag_next_runtime)
|
||
imp_list->has_cxx_cdtors = (need_ctor || need_dtor);
|
||
}
|
||
#endif
|
||
|
||
/* 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 initialization.
|
||
But that doesn't hurt, it's just a little inefficient. */
|
||
|
||
static void
|
||
generate_protocols (void)
|
||
{
|
||
tree p, encoding;
|
||
tree decl;
|
||
tree initlist, protocol_name_expr, refs_decl, refs_expr;
|
||
|
||
/* If a protocol was directly referenced, pull in indirect references. */
|
||
for (p = protocol_chain; p; p = TREE_CHAIN (p))
|
||
if (PROTOCOL_FORWARD_DECL (p) && PROTOCOL_LIST (p))
|
||
generate_protocol_references (PROTOCOL_LIST (p));
|
||
|
||
for (p = protocol_chain; p; p = TREE_CHAIN (p))
|
||
{
|
||
tree nst_methods = PROTOCOL_NST_METHODS (p);
|
||
tree cls_methods = PROTOCOL_CLS_METHODS (p);
|
||
|
||
/* If protocol wasn't referenced, don't generate any code. */
|
||
decl = PROTOCOL_FORWARD_DECL (p);
|
||
|
||
if (!decl)
|
||
continue;
|
||
|
||
/* Make sure we link in the Protocol class. */
|
||
add_class_reference (get_identifier (PROTOCOL_OBJECT_CLASS_NAME));
|
||
|
||
while (nst_methods)
|
||
{
|
||
if (! METHOD_ENCODING (nst_methods))
|
||
{
|
||
encoding = encode_method_prototype (nst_methods);
|
||
METHOD_ENCODING (nst_methods) = encoding;
|
||
}
|
||
nst_methods = TREE_CHAIN (nst_methods);
|
||
}
|
||
|
||
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);
|
||
}
|
||
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>; */
|
||
protocol_name_expr = add_objc_string (PROTOCOL_NAME (p), class_names);
|
||
|
||
if (refs_decl)
|
||
refs_expr = convert (build_pointer_type (build_pointer_type
|
||
(objc_protocol_template)),
|
||
build_unary_op (ADDR_EXPR, refs_decl, 0));
|
||
else
|
||
refs_expr = build_int_cst (NULL_TREE, 0);
|
||
|
||
/* UOBJC_INSTANCE_METHODS_decl/UOBJC_CLASS_METHODS_decl are set
|
||
by generate_method_descriptors, which is called above. */
|
||
initlist = build_protocol_initializer (TREE_TYPE (decl),
|
||
protocol_name_expr, refs_expr,
|
||
UOBJC_INSTANCE_METHODS_decl,
|
||
UOBJC_CLASS_METHODS_decl);
|
||
finish_var_decl (decl, initlist);
|
||
}
|
||
}
|
||
|
||
static tree
|
||
build_protocol_initializer (tree type, tree protocol_name,
|
||
tree protocol_list, tree instance_methods,
|
||
tree class_methods)
|
||
{
|
||
tree initlist = NULL_TREE, expr;
|
||
tree cast_type = build_pointer_type
|
||
(xref_tag (RECORD_TYPE,
|
||
get_identifier (UTAG_CLASS)));
|
||
|
||
/* Filling the "isa" in with one allows the runtime system to
|
||
detect that the version change...should remove before final release. */
|
||
|
||
expr = build_int_cst (cast_type, PROTOCOL_VERSION);
|
||
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_cst (NULL_TREE, 0), initlist);
|
||
else
|
||
{
|
||
expr = convert (objc_method_proto_list_ptr,
|
||
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_cst (NULL_TREE, 0), initlist);
|
||
else
|
||
{
|
||
expr = convert (objc_method_proto_list_ptr,
|
||
build_unary_op (ADDR_EXPR, class_methods, 0));
|
||
initlist = tree_cons (NULL_TREE, expr, initlist);
|
||
}
|
||
|
||
return objc_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 (void)
|
||
{
|
||
tree field_decl, field_decl_chain;
|
||
|
||
objc_category_template = start_struct (RECORD_TYPE,
|
||
get_identifier (UTAG_CATEGORY));
|
||
|
||
/* char *category_name; */
|
||
field_decl = create_field_decl (string_type_node, "category_name");
|
||
field_decl_chain = field_decl;
|
||
|
||
/* char *class_name; */
|
||
field_decl = create_field_decl (string_type_node, "class_name");
|
||
chainon (field_decl_chain, field_decl);
|
||
|
||
/* struct _objc_method_list *instance_methods; */
|
||
field_decl = create_field_decl (objc_method_list_ptr,
|
||
"instance_methods");
|
||
chainon (field_decl_chain, field_decl);
|
||
|
||
/* struct _objc_method_list *class_methods; */
|
||
field_decl = create_field_decl (objc_method_list_ptr,
|
||
"class_methods");
|
||
chainon (field_decl_chain, field_decl);
|
||
|
||
/* struct _objc_protocol **protocol_list; */
|
||
field_decl = create_field_decl (build_pointer_type
|
||
(build_pointer_type
|
||
(objc_protocol_template)),
|
||
"protocol_list");
|
||
chainon (field_decl_chain, field_decl);
|
||
|
||
finish_struct (objc_category_template, field_decl_chain, NULL_TREE);
|
||
}
|
||
|
||
/* struct _objc_selector {
|
||
SEL sel_id;
|
||
char *sel_type;
|
||
}; */
|
||
|
||
static void
|
||
build_selector_template (void)
|
||
{
|
||
|
||
tree field_decl, field_decl_chain;
|
||
|
||
objc_selector_template
|
||
= start_struct (RECORD_TYPE, get_identifier (UTAG_SELECTOR));
|
||
|
||
/* SEL sel_id; */
|
||
field_decl = create_field_decl (objc_selector_type, "sel_id");
|
||
field_decl_chain = field_decl;
|
||
|
||
/* char *sel_type; */
|
||
field_decl = create_field_decl (string_type_node, "sel_type");
|
||
chainon (field_decl_chain, field_decl);
|
||
|
||
finish_struct (objc_selector_template, field_decl_chain, NULL_TREE);
|
||
}
|
||
|
||
/* 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;
|
||
#ifdef __NEXT_RUNTIME__
|
||
struct objc_cache *cache;
|
||
#else
|
||
struct sarray *dtable;
|
||
struct _objc_class *subclass_list;
|
||
struct _objc_class *sibling_class;
|
||
#endif
|
||
struct _objc_protocol_list *protocols;
|
||
#ifdef __NEXT_RUNTIME__
|
||
void *sel_id;
|
||
#endif
|
||
void *gc_object_type;
|
||
}; */
|
||
|
||
/* NB: The 'sel_id' and 'gc_object_type' fields are not being used by
|
||
the NeXT/Apple runtime; still, the compiler must generate them to
|
||
maintain backward binary compatibility (and to allow for future
|
||
expansion). */
|
||
|
||
static void
|
||
build_class_template (void)
|
||
{
|
||
tree field_decl, field_decl_chain;
|
||
|
||
objc_class_template
|
||
= start_struct (RECORD_TYPE, get_identifier (UTAG_CLASS));
|
||
|
||
/* struct _objc_class *isa; */
|
||
field_decl = create_field_decl (build_pointer_type (objc_class_template),
|
||
"isa");
|
||
field_decl_chain = field_decl;
|
||
|
||
/* struct _objc_class *super_class; */
|
||
field_decl = create_field_decl (build_pointer_type (objc_class_template),
|
||
"super_class");
|
||
chainon (field_decl_chain, field_decl);
|
||
|
||
/* char *name; */
|
||
field_decl = create_field_decl (string_type_node, "name");
|
||
chainon (field_decl_chain, field_decl);
|
||
|
||
/* long version; */
|
||
field_decl = create_field_decl (long_integer_type_node, "version");
|
||
chainon (field_decl_chain, field_decl);
|
||
|
||
/* long info; */
|
||
field_decl = create_field_decl (long_integer_type_node, "info");
|
||
chainon (field_decl_chain, field_decl);
|
||
|
||
/* long instance_size; */
|
||
field_decl = create_field_decl (long_integer_type_node, "instance_size");
|
||
chainon (field_decl_chain, field_decl);
|
||
|
||
/* struct _objc_ivar_list *ivars; */
|
||
field_decl = create_field_decl (objc_ivar_list_ptr,
|
||
"ivars");
|
||
chainon (field_decl_chain, field_decl);
|
||
|
||
/* struct _objc_method_list *methods; */
|
||
field_decl = create_field_decl (objc_method_list_ptr,
|
||
"methods");
|
||
chainon (field_decl_chain, field_decl);
|
||
|
||
if (flag_next_runtime)
|
||
{
|
||
/* struct objc_cache *cache; */
|
||
field_decl = create_field_decl (build_pointer_type
|
||
(xref_tag (RECORD_TYPE,
|
||
get_identifier
|
||
("objc_cache"))),
|
||
"cache");
|
||
chainon (field_decl_chain, field_decl);
|
||
}
|
||
else
|
||
{
|
||
/* struct sarray *dtable; */
|
||
field_decl = create_field_decl (build_pointer_type
|
||
(xref_tag (RECORD_TYPE,
|
||
get_identifier
|
||
("sarray"))),
|
||
"dtable");
|
||
chainon (field_decl_chain, field_decl);
|
||
|
||
/* struct objc_class *subclass_list; */
|
||
field_decl = create_field_decl (build_pointer_type
|
||
(objc_class_template),
|
||
"subclass_list");
|
||
chainon (field_decl_chain, field_decl);
|
||
|
||
/* struct objc_class *sibling_class; */
|
||
field_decl = create_field_decl (build_pointer_type
|
||
(objc_class_template),
|
||
"sibling_class");
|
||
chainon (field_decl_chain, field_decl);
|
||
}
|
||
|
||
/* struct _objc_protocol **protocol_list; */
|
||
field_decl = create_field_decl (build_pointer_type
|
||
(build_pointer_type
|
||
(xref_tag (RECORD_TYPE,
|
||
get_identifier
|
||
(UTAG_PROTOCOL)))),
|
||
"protocol_list");
|
||
chainon (field_decl_chain, field_decl);
|
||
|
||
if (flag_next_runtime)
|
||
{
|
||
/* void *sel_id; */
|
||
field_decl = create_field_decl (build_pointer_type (void_type_node),
|
||
"sel_id");
|
||
chainon (field_decl_chain, field_decl);
|
||
}
|
||
|
||
/* void *gc_object_type; */
|
||
field_decl = create_field_decl (build_pointer_type (void_type_node),
|
||
"gc_object_type");
|
||
chainon (field_decl_chain, field_decl);
|
||
|
||
finish_struct (objc_class_template, field_decl_chain, NULL_TREE);
|
||
}
|
||
|
||
/* Generate appropriate forward declarations for an implementation. */
|
||
|
||
static void
|
||
synth_forward_declarations (void)
|
||
{
|
||
tree an_id;
|
||
|
||
/* static struct objc_class _OBJC_CLASS_<my_name>; */
|
||
UOBJC_CLASS_decl = build_metadata_decl ("_OBJC_CLASS",
|
||
objc_class_template);
|
||
|
||
/* static struct objc_class _OBJC_METACLASS_<my_name>; */
|
||
UOBJC_METACLASS_decl = build_metadata_decl ("_OBJC_METACLASS",
|
||
objc_class_template);
|
||
|
||
/* Pre-build the following entities - for speed/convenience. */
|
||
|
||
an_id = get_identifier ("super_class");
|
||
ucls_super_ref = objc_build_component_ref (UOBJC_CLASS_decl, an_id);
|
||
uucls_super_ref = objc_build_component_ref (UOBJC_METACLASS_decl, an_id);
|
||
}
|
||
|
||
static void
|
||
error_with_ivar (const char *message, tree decl)
|
||
{
|
||
error ("%J%s %qs", decl,
|
||
message, gen_declaration (decl));
|
||
|
||
}
|
||
|
||
static void
|
||
check_ivars (tree inter, tree imp)
|
||
{
|
||
tree intdecls = CLASS_RAW_IVARS (inter);
|
||
tree impdecls = CLASS_RAW_IVARS (imp);
|
||
|
||
while (1)
|
||
{
|
||
tree t1, t2;
|
||
|
||
#ifdef OBJCPLUS
|
||
if (intdecls && TREE_CODE (intdecls) == TYPE_DECL)
|
||
intdecls = TREE_CHAIN (intdecls);
|
||
#endif
|
||
if (intdecls == 0 && impdecls == 0)
|
||
break;
|
||
if (intdecls == 0 || impdecls == 0)
|
||
{
|
||
error ("inconsistent instance variable specification");
|
||
break;
|
||
}
|
||
|
||
t1 = TREE_TYPE (intdecls); t2 = TREE_TYPE (impdecls);
|
||
|
||
if (!comptypes (t1, t2)
|
||
|| !tree_int_cst_equal (DECL_INITIAL (intdecls),
|
||
DECL_INITIAL (impdecls)))
|
||
{
|
||
if (DECL_NAME (intdecls) == DECL_NAME (impdecls))
|
||
{
|
||
error_with_ivar ("conflicting instance variable type",
|
||
impdecls);
|
||
error_with_ivar ("previous declaration of",
|
||
intdecls);
|
||
}
|
||
else /* both the type and the name don't match */
|
||
{
|
||
error ("inconsistent instance variable specification");
|
||
break;
|
||
}
|
||
}
|
||
|
||
else if (DECL_NAME (intdecls) != DECL_NAME (impdecls))
|
||
{
|
||
error_with_ivar ("conflicting instance variable name",
|
||
impdecls);
|
||
error_with_ivar ("previous declaration of",
|
||
intdecls);
|
||
}
|
||
|
||
intdecls = TREE_CHAIN (intdecls);
|
||
impdecls = TREE_CHAIN (impdecls);
|
||
}
|
||
}
|
||
|
||
/* Set 'objc_super_template' to the data type node for 'struct _objc_super'.
|
||
This needs to be done just once per compilation. */
|
||
|
||
/* struct _objc_super {
|
||
struct _objc_object *self;
|
||
struct _objc_class *super_class;
|
||
}; */
|
||
|
||
static void
|
||
build_super_template (void)
|
||
{
|
||
tree field_decl, field_decl_chain;
|
||
|
||
objc_super_template = start_struct (RECORD_TYPE, get_identifier (UTAG_SUPER));
|
||
|
||
/* struct _objc_object *self; */
|
||
field_decl = create_field_decl (objc_object_type, "self");
|
||
field_decl_chain = field_decl;
|
||
|
||
/* struct _objc_class *super_class; */
|
||
field_decl = create_field_decl (build_pointer_type (objc_class_template),
|
||
"super_class");
|
||
chainon (field_decl_chain, field_decl);
|
||
|
||
finish_struct (objc_super_template, field_decl_chain, NULL_TREE);
|
||
}
|
||
|
||
/* struct _objc_ivar {
|
||
char *ivar_name;
|
||
char *ivar_type;
|
||
int ivar_offset;
|
||
}; */
|
||
|
||
static tree
|
||
build_ivar_template (void)
|
||
{
|
||
tree objc_ivar_id, objc_ivar_record;
|
||
tree field_decl, field_decl_chain;
|
||
|
||
objc_ivar_id = get_identifier (UTAG_IVAR);
|
||
objc_ivar_record = start_struct (RECORD_TYPE, objc_ivar_id);
|
||
|
||
/* char *ivar_name; */
|
||
field_decl = create_field_decl (string_type_node, "ivar_name");
|
||
field_decl_chain = field_decl;
|
||
|
||
/* char *ivar_type; */
|
||
field_decl = create_field_decl (string_type_node, "ivar_type");
|
||
chainon (field_decl_chain, field_decl);
|
||
|
||
/* int ivar_offset; */
|
||
field_decl = create_field_decl (integer_type_node, "ivar_offset");
|
||
chainon (field_decl_chain, field_decl);
|
||
|
||
finish_struct (objc_ivar_record, field_decl_chain, NULL_TREE);
|
||
|
||
return objc_ivar_record;
|
||
}
|
||
|
||
/* struct {
|
||
int ivar_count;
|
||
struct objc_ivar ivar_list[ivar_count];
|
||
}; */
|
||
|
||
static tree
|
||
build_ivar_list_template (tree list_type, int size)
|
||
{
|
||
tree objc_ivar_list_record;
|
||
tree field_decl, field_decl_chain;
|
||
|
||
objc_ivar_list_record = start_struct (RECORD_TYPE, NULL_TREE);
|
||
|
||
/* int ivar_count; */
|
||
field_decl = create_field_decl (integer_type_node, "ivar_count");
|
||
field_decl_chain = field_decl;
|
||
|
||
/* struct objc_ivar ivar_list[]; */
|
||
field_decl = create_field_decl (build_array_type
|
||
(list_type,
|
||
build_index_type
|
||
(build_int_cst (NULL_TREE, size - 1))),
|
||
"ivar_list");
|
||
chainon (field_decl_chain, field_decl);
|
||
|
||
finish_struct (objc_ivar_list_record, field_decl_chain, NULL_TREE);
|
||
|
||
return objc_ivar_list_record;
|
||
}
|
||
|
||
/* struct {
|
||
struct _objc__method_prototype_list *method_next;
|
||
int method_count;
|
||
struct objc_method method_list[method_count];
|
||
}; */
|
||
|
||
static tree
|
||
build_method_list_template (tree list_type, int size)
|
||
{
|
||
tree objc_ivar_list_record;
|
||
tree field_decl, field_decl_chain;
|
||
|
||
objc_ivar_list_record = start_struct (RECORD_TYPE, NULL_TREE);
|
||
|
||
/* struct _objc__method_prototype_list *method_next; */
|
||
field_decl = create_field_decl (objc_method_proto_list_ptr,
|
||
"method_next");
|
||
field_decl_chain = field_decl;
|
||
|
||
/* int method_count; */
|
||
field_decl = create_field_decl (integer_type_node, "method_count");
|
||
chainon (field_decl_chain, field_decl);
|
||
|
||
/* struct objc_method method_list[]; */
|
||
field_decl = create_field_decl (build_array_type
|
||
(list_type,
|
||
build_index_type
|
||
(build_int_cst (NULL_TREE, size - 1))),
|
||
"method_list");
|
||
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_ivar_list_initializer (tree type, tree field_decl)
|
||
{
|
||
tree initlist = NULL_TREE;
|
||
|
||
do
|
||
{
|
||
tree ivar = NULL_TREE;
|
||
|
||
/* Set name. */
|
||
if (DECL_NAME (field_decl))
|
||
ivar = tree_cons (NULL_TREE,
|
||
add_objc_string (DECL_NAME (field_decl),
|
||
meth_var_names),
|
||
ivar);
|
||
else
|
||
/* Unnamed bit-field ivar (yuck). */
|
||
ivar = tree_cons (NULL_TREE, build_int_cst (NULL_TREE, 0), ivar);
|
||
|
||
/* Set type. */
|
||
encode_field_decl (field_decl,
|
||
obstack_object_size (&util_obstack),
|
||
OBJC_ENCODE_DONT_INLINE_DEFS);
|
||
|
||
/* Null terminate string. */
|
||
obstack_1grow (&util_obstack, 0);
|
||
ivar
|
||
= tree_cons
|
||
(NULL_TREE,
|
||
add_objc_string (get_identifier (obstack_finish (&util_obstack)),
|
||
meth_var_types),
|
||
ivar);
|
||
obstack_free (&util_obstack, util_firstobj);
|
||
|
||
/* Set offset. */
|
||
ivar = tree_cons (NULL_TREE, byte_position (field_decl), ivar);
|
||
initlist = tree_cons (NULL_TREE,
|
||
objc_build_constructor (type, nreverse (ivar)),
|
||
initlist);
|
||
do
|
||
field_decl = TREE_CHAIN (field_decl);
|
||
while (field_decl && TREE_CODE (field_decl) != FIELD_DECL);
|
||
}
|
||
while (field_decl);
|
||
|
||
return objc_build_constructor (build_array_type (type, 0),
|
||
nreverse (initlist));
|
||
}
|
||
|
||
static tree
|
||
generate_ivars_list (tree type, const char *name, int size, tree list)
|
||
{
|
||
tree decl, initlist;
|
||
|
||
decl = start_var_decl (type, synth_id_with_class_suffix
|
||
(name, objc_implementation_context));
|
||
|
||
initlist = build_tree_list (NULL_TREE, build_int_cst (NULL_TREE, size));
|
||
initlist = tree_cons (NULL_TREE, list, initlist);
|
||
|
||
finish_var_decl (decl,
|
||
objc_build_constructor (TREE_TYPE (decl),
|
||
nreverse (initlist)));
|
||
|
||
return decl;
|
||
}
|
||
|
||
/* Count only the fields occurring in T. */
|
||
|
||
static int
|
||
ivar_list_length (tree t)
|
||
{
|
||
int count = 0;
|
||
|
||
for (; t; t = TREE_CHAIN (t))
|
||
if (TREE_CODE (t) == FIELD_DECL)
|
||
++count;
|
||
|
||
return count;
|
||
}
|
||
|
||
static void
|
||
generate_ivar_lists (void)
|
||
{
|
||
tree initlist, ivar_list_template, chain;
|
||
int size;
|
||
|
||
generating_instance_variables = 1;
|
||
|
||
if (!objc_ivar_template)
|
||
objc_ivar_template = build_ivar_template ();
|
||
|
||
/* Only generate class variables for the root of the inheritance
|
||
hierarchy since these will be the same for every class. */
|
||
|
||
if (CLASS_SUPER_NAME (implementation_template) == NULL_TREE
|
||
&& (chain = TYPE_FIELDS (objc_class_template)))
|
||
{
|
||
size = ivar_list_length (chain);
|
||
|
||
ivar_list_template = build_ivar_list_template (objc_ivar_template, size);
|
||
initlist = build_ivar_list_initializer (objc_ivar_template, chain);
|
||
|
||
UOBJC_CLASS_VARIABLES_decl
|
||
= generate_ivars_list (ivar_list_template, "_OBJC_CLASS_VARIABLES",
|
||
size, initlist);
|
||
}
|
||
else
|
||
UOBJC_CLASS_VARIABLES_decl = 0;
|
||
|
||
chain = CLASS_IVARS (implementation_template);
|
||
if (chain)
|
||
{
|
||
size = ivar_list_length (chain);
|
||
ivar_list_template = build_ivar_list_template (objc_ivar_template, size);
|
||
initlist = build_ivar_list_initializer (objc_ivar_template, chain);
|
||
|
||
UOBJC_INSTANCE_VARIABLES_decl
|
||
= generate_ivars_list (ivar_list_template, "_OBJC_INSTANCE_VARIABLES",
|
||
size, initlist);
|
||
}
|
||
else
|
||
UOBJC_INSTANCE_VARIABLES_decl = 0;
|
||
|
||
generating_instance_variables = 0;
|
||
}
|
||
|
||
static tree
|
||
build_dispatch_table_initializer (tree type, tree entries)
|
||
{
|
||
tree initlist = NULL_TREE;
|
||
|
||
do
|
||
{
|
||
tree elemlist = NULL_TREE;
|
||
|
||
elemlist = tree_cons (NULL_TREE,
|
||
build_selector (METHOD_SEL_NAME (entries)),
|
||
NULL_TREE);
|
||
|
||
/* Generate the method encoding if we don't have one already. */
|
||
if (! METHOD_ENCODING (entries))
|
||
METHOD_ENCODING (entries) =
|
||
encode_method_prototype (entries);
|
||
|
||
elemlist = tree_cons (NULL_TREE,
|
||
add_objc_string (METHOD_ENCODING (entries),
|
||
meth_var_types),
|
||
elemlist);
|
||
|
||
elemlist
|
||
= tree_cons (NULL_TREE,
|
||
convert (ptr_type_node,
|
||
build_unary_op (ADDR_EXPR,
|
||
METHOD_DEFINITION (entries), 1)),
|
||
elemlist);
|
||
|
||
initlist = tree_cons (NULL_TREE,
|
||
objc_build_constructor (type, nreverse (elemlist)),
|
||
initlist);
|
||
|
||
entries = TREE_CHAIN (entries);
|
||
}
|
||
while (entries);
|
||
|
||
return objc_build_constructor (build_array_type (type, 0),
|
||
nreverse (initlist));
|
||
}
|
||
|
||
/* To accomplish method prototyping without generating all kinds of
|
||
inane warnings, the definition of the dispatch table entries were
|
||
changed from:
|
||
|
||
struct objc_method { SEL _cmd; ...; id (*_imp)(); };
|
||
to:
|
||
struct objc_method { SEL _cmd; ...; void *_imp; }; */
|
||
|
||
static tree
|
||
build_method_template (void)
|
||
{
|
||
tree _SLT_record;
|
||
tree field_decl, field_decl_chain;
|
||
|
||
_SLT_record = start_struct (RECORD_TYPE, get_identifier (UTAG_METHOD));
|
||
|
||
/* SEL _cmd; */
|
||
field_decl = create_field_decl (objc_selector_type, "_cmd");
|
||
field_decl_chain = field_decl;
|
||
|
||
/* char *method_types; */
|
||
field_decl = create_field_decl (string_type_node, "method_types");
|
||
chainon (field_decl_chain, field_decl);
|
||
|
||
/* void *_imp; */
|
||
field_decl = create_field_decl (build_pointer_type (void_type_node),
|
||
"_imp");
|
||
chainon (field_decl_chain, field_decl);
|
||
|
||
finish_struct (_SLT_record, field_decl_chain, NULL_TREE);
|
||
|
||
return _SLT_record;
|
||
}
|
||
|
||
|
||
static tree
|
||
generate_dispatch_table (tree type, const char *name, int size, tree list)
|
||
{
|
||
tree decl, initlist;
|
||
|
||
decl = start_var_decl (type, synth_id_with_class_suffix
|
||
(name, objc_implementation_context));
|
||
|
||
initlist = build_tree_list (NULL_TREE, build_int_cst (NULL_TREE, 0));
|
||
initlist = tree_cons (NULL_TREE, build_int_cst (NULL_TREE, size), initlist);
|
||
initlist = tree_cons (NULL_TREE, list, initlist);
|
||
|
||
finish_var_decl (decl,
|
||
objc_build_constructor (TREE_TYPE (decl),
|
||
nreverse (initlist)));
|
||
|
||
return decl;
|
||
}
|
||
|
||
static void
|
||
mark_referenced_methods (void)
|
||
{
|
||
struct imp_entry *impent;
|
||
tree chain;
|
||
|
||
for (impent = imp_list; impent; impent = impent->next)
|
||
{
|
||
chain = CLASS_CLS_METHODS (impent->imp_context);
|
||
while (chain)
|
||
{
|
||
cgraph_mark_needed_node (cgraph_node (METHOD_DEFINITION (chain)));
|
||
chain = TREE_CHAIN (chain);
|
||
}
|
||
|
||
chain = CLASS_NST_METHODS (impent->imp_context);
|
||
while (chain)
|
||
{
|
||
cgraph_mark_needed_node (cgraph_node (METHOD_DEFINITION (chain)));
|
||
chain = TREE_CHAIN (chain);
|
||
}
|
||
}
|
||
}
|
||
|
||
static void
|
||
generate_dispatch_tables (void)
|
||
{
|
||
tree initlist, chain, method_list_template;
|
||
int size;
|
||
|
||
if (!objc_method_template)
|
||
objc_method_template = build_method_template ();
|
||
|
||
chain = CLASS_CLS_METHODS (objc_implementation_context);
|
||
if (chain)
|
||
{
|
||
size = list_length (chain);
|
||
|
||
method_list_template
|
||
= build_method_list_template (objc_method_template, size);
|
||
initlist
|
||
= build_dispatch_table_initializer (objc_method_template, chain);
|
||
|
||
UOBJC_CLASS_METHODS_decl
|
||
= generate_dispatch_table (method_list_template,
|
||
((TREE_CODE (objc_implementation_context)
|
||
== CLASS_IMPLEMENTATION_TYPE)
|
||
? "_OBJC_CLASS_METHODS"
|
||
: "_OBJC_CATEGORY_CLASS_METHODS"),
|
||
size, initlist);
|
||
}
|
||
else
|
||
UOBJC_CLASS_METHODS_decl = 0;
|
||
|
||
chain = CLASS_NST_METHODS (objc_implementation_context);
|
||
if (chain)
|
||
{
|
||
size = list_length (chain);
|
||
|
||
method_list_template
|
||
= build_method_list_template (objc_method_template, size);
|
||
initlist
|
||
= build_dispatch_table_initializer (objc_method_template, chain);
|
||
|
||
if (TREE_CODE (objc_implementation_context) == CLASS_IMPLEMENTATION_TYPE)
|
||
UOBJC_INSTANCE_METHODS_decl
|
||
= generate_dispatch_table (method_list_template,
|
||
"_OBJC_INSTANCE_METHODS",
|
||
size, initlist);
|
||
else
|
||
/* We have a category. */
|
||
UOBJC_INSTANCE_METHODS_decl
|
||
= generate_dispatch_table (method_list_template,
|
||
"_OBJC_CATEGORY_INSTANCE_METHODS",
|
||
size, initlist);
|
||
}
|
||
else
|
||
UOBJC_INSTANCE_METHODS_decl = 0;
|
||
}
|
||
|
||
static tree
|
||
generate_protocol_list (tree i_or_p)
|
||
{
|
||
tree initlist;
|
||
tree refs_decl, lproto, e, plist;
|
||
int size = 0;
|
||
const char *ref_name;
|
||
|
||
if (TREE_CODE (i_or_p) == CLASS_INTERFACE_TYPE
|
||
|| TREE_CODE (i_or_p) == CATEGORY_INTERFACE_TYPE)
|
||
plist = CLASS_PROTOCOL_LIST (i_or_p);
|
||
else if (TREE_CODE (i_or_p) == PROTOCOL_INTERFACE_TYPE)
|
||
plist = PROTOCOL_LIST (i_or_p);
|
||
else
|
||
abort ();
|
||
|
||
/* 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. */
|
||
initlist = tree_cons (NULL_TREE, build_int_cst (NULL_TREE, 0), NULL_TREE);
|
||
e = build_int_cst (build_pointer_type (objc_protocol_template), size);
|
||
initlist = tree_cons (NULL_TREE, e, initlist);
|
||
|
||
for (lproto = plist; lproto; lproto = TREE_CHAIN (lproto))
|
||
{
|
||
tree pval = TREE_VALUE (lproto);
|
||
|
||
if (TREE_CODE (pval) == PROTOCOL_INTERFACE_TYPE
|
||
&& PROTOCOL_FORWARD_DECL (pval))
|
||
{
|
||
e = build_unary_op (ADDR_EXPR, PROTOCOL_FORWARD_DECL (pval), 0);
|
||
initlist = tree_cons (NULL_TREE, e, initlist);
|
||
}
|
||
}
|
||
|
||
/* static struct objc_protocol *refs[n]; */
|
||
|
||
if (TREE_CODE (i_or_p) == PROTOCOL_INTERFACE_TYPE)
|
||
ref_name = synth_id_with_class_suffix ("_OBJC_PROTOCOL_REFS", i_or_p);
|
||
else if (TREE_CODE (i_or_p) == CLASS_INTERFACE_TYPE)
|
||
ref_name = synth_id_with_class_suffix ("_OBJC_CLASS_PROTOCOLS", i_or_p);
|
||
else if (TREE_CODE (i_or_p) == CATEGORY_INTERFACE_TYPE)
|
||
ref_name = synth_id_with_class_suffix ("_OBJC_CATEGORY_PROTOCOLS", i_or_p);
|
||
else
|
||
abort ();
|
||
|
||
refs_decl = start_var_decl
|
||
(build_array_type
|
||
(build_pointer_type (objc_protocol_template),
|
||
build_index_type (build_int_cst (NULL_TREE, size + 2))),
|
||
ref_name);
|
||
|
||
finish_var_decl (refs_decl, objc_build_constructor (TREE_TYPE (refs_decl),
|
||
nreverse (initlist)));
|
||
|
||
return refs_decl;
|
||
}
|
||
|
||
static tree
|
||
build_category_initializer (tree type, tree cat_name, tree class_name,
|
||
tree instance_methods, tree class_methods,
|
||
tree protocol_list)
|
||
{
|
||
tree initlist = NULL_TREE, expr;
|
||
|
||
initlist = tree_cons (NULL_TREE, cat_name, initlist);
|
||
initlist = tree_cons (NULL_TREE, class_name, initlist);
|
||
|
||
if (!instance_methods)
|
||
initlist = tree_cons (NULL_TREE, build_int_cst (NULL_TREE, 0), initlist);
|
||
else
|
||
{
|
||
expr = convert (objc_method_list_ptr,
|
||
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_cst (NULL_TREE, 0), initlist);
|
||
else
|
||
{
|
||
expr = convert (objc_method_list_ptr,
|
||
build_unary_op (ADDR_EXPR, class_methods, 0));
|
||
initlist = tree_cons (NULL_TREE, expr, initlist);
|
||
}
|
||
|
||
/* protocol_list = */
|
||
if (!protocol_list)
|
||
initlist = tree_cons (NULL_TREE, build_int_cst (NULL_TREE, 0), initlist);
|
||
else
|
||
{
|
||
expr = convert (build_pointer_type
|
||
(build_pointer_type
|
||
(objc_protocol_template)),
|
||
build_unary_op (ADDR_EXPR, protocol_list, 0));
|
||
initlist = tree_cons (NULL_TREE, expr, initlist);
|
||
}
|
||
|
||
return objc_build_constructor (type, nreverse (initlist));
|
||
}
|
||
|
||
/* 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;
|
||
if (flag_next_runtime)
|
||
struct objc_cache *cache;
|
||
else {
|
||
struct sarray *dtable;
|
||
struct objc_class *subclass_list;
|
||
struct objc_class *sibling_class;
|
||
}
|
||
struct objc_protocol_list *protocols;
|
||
if (flag_next_runtime)
|
||
void *sel_id;
|
||
void *gc_object_type;
|
||
}; */
|
||
|
||
static tree
|
||
build_shared_structure_initializer (tree type, tree isa, tree super,
|
||
tree name, tree size, int status,
|
||
tree dispatch_table, tree ivar_list,
|
||
tree protocol_list)
|
||
{
|
||
tree initlist = NULL_TREE, expr;
|
||
|
||
/* isa = */
|
||
initlist = tree_cons (NULL_TREE, isa, initlist);
|
||
|
||
/* super_class = */
|
||
initlist = tree_cons (NULL_TREE, super, initlist);
|
||
|
||
/* name = */
|
||
initlist = tree_cons (NULL_TREE, default_conversion (name), initlist);
|
||
|
||
/* version = */
|
||
initlist = tree_cons (NULL_TREE, build_int_cst (long_integer_type_node, 0),
|
||
initlist);
|
||
|
||
/* info = */
|
||
initlist = tree_cons (NULL_TREE,
|
||
build_int_cst (long_integer_type_node, status),
|
||
initlist);
|
||
|
||
/* instance_size = */
|
||
initlist = tree_cons (NULL_TREE, convert (long_integer_type_node, size),
|
||
initlist);
|
||
|
||
/* objc_ivar_list = */
|
||
if (!ivar_list)
|
||
initlist = tree_cons (NULL_TREE, build_int_cst (NULL_TREE, 0), initlist);
|
||
else
|
||
{
|
||
expr = convert (objc_ivar_list_ptr,
|
||
build_unary_op (ADDR_EXPR, ivar_list, 0));
|
||
initlist = tree_cons (NULL_TREE, expr, initlist);
|
||
}
|
||
|
||
/* objc_method_list = */
|
||
if (!dispatch_table)
|
||
initlist = tree_cons (NULL_TREE, build_int_cst (NULL_TREE, 0), initlist);
|
||
else
|
||
{
|
||
expr = convert (objc_method_list_ptr,
|
||
build_unary_op (ADDR_EXPR, dispatch_table, 0));
|
||
initlist = tree_cons (NULL_TREE, expr, initlist);
|
||
}
|
||
|
||
if (flag_next_runtime)
|
||
/* method_cache = */
|
||
initlist = tree_cons (NULL_TREE, build_int_cst (NULL_TREE, 0), initlist);
|
||
else
|
||
{
|
||
/* dtable = */
|
||
initlist = tree_cons (NULL_TREE, build_int_cst (NULL_TREE, 0), initlist);
|
||
|
||
/* subclass_list = */
|
||
initlist = tree_cons (NULL_TREE, build_int_cst (NULL_TREE, 0), initlist);
|
||
|
||
/* sibling_class = */
|
||
initlist = tree_cons (NULL_TREE, build_int_cst (NULL_TREE, 0), initlist);
|
||
}
|
||
|
||
/* protocol_list = */
|
||
if (! protocol_list)
|
||
initlist = tree_cons (NULL_TREE, build_int_cst (NULL_TREE, 0), initlist);
|
||
else
|
||
{
|
||
expr = convert (build_pointer_type
|
||
(build_pointer_type
|
||
(objc_protocol_template)),
|
||
build_unary_op (ADDR_EXPR, protocol_list, 0));
|
||
initlist = tree_cons (NULL_TREE, expr, initlist);
|
||
}
|
||
|
||
if (flag_next_runtime)
|
||
/* sel_id = NULL */
|
||
initlist = tree_cons (NULL_TREE, build_int_cst (NULL_TREE, 0), initlist);
|
||
|
||
/* gc_object_type = NULL */
|
||
initlist = tree_cons (NULL_TREE, build_int_cst (NULL_TREE, 0), initlist);
|
||
|
||
return objc_build_constructor (type, nreverse (initlist));
|
||
}
|
||
|
||
/* Retrieve category interface CAT_NAME (if any) associated with CLASS. */
|
||
|
||
static inline tree
|
||
lookup_category (tree class, tree cat_name)
|
||
{
|
||
tree category = CLASS_CATEGORY_LIST (class);
|
||
|
||
while (category && CLASS_SUPER_NAME (category) != cat_name)
|
||
category = CLASS_CATEGORY_LIST (category);
|
||
return category;
|
||
}
|
||
|
||
/* static struct objc_category _OBJC_CATEGORY_<name> = { ... }; */
|
||
|
||
static void
|
||
generate_category (tree cat)
|
||
{
|
||
tree decl;
|
||
tree initlist, cat_name_expr, class_name_expr;
|
||
tree protocol_decl, category;
|
||
|
||
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 (implementation_template,
|
||
CLASS_SUPER_NAME (cat));
|
||
|
||
if (category && CLASS_PROTOCOL_LIST (category))
|
||
{
|
||
generate_protocol_references (CLASS_PROTOCOL_LIST (category));
|
||
protocol_decl = generate_protocol_list (category);
|
||
}
|
||
else
|
||
protocol_decl = 0;
|
||
|
||
decl = start_var_decl (objc_category_template,
|
||
synth_id_with_class_suffix
|
||
("_OBJC_CATEGORY", objc_implementation_context));
|
||
|
||
initlist = build_category_initializer (TREE_TYPE (decl),
|
||
cat_name_expr, class_name_expr,
|
||
UOBJC_INSTANCE_METHODS_decl,
|
||
UOBJC_CLASS_METHODS_decl,
|
||
protocol_decl);
|
||
|
||
finish_var_decl (decl, initlist);
|
||
}
|
||
|
||
/* static struct objc_class _OBJC_METACLASS_Foo={ ... };
|
||
static struct objc_class _OBJC_CLASS_Foo={ ... }; */
|
||
|
||
static void
|
||
generate_shared_structures (int cls_flags)
|
||
{
|
||
tree sc_spec, decl_specs, decl;
|
||
tree name_expr, super_expr, root_expr;
|
||
tree my_root_id = NULL_TREE, my_super_id = NULL_TREE;
|
||
tree cast_type, initlist, protocol_decl;
|
||
|
||
my_super_id = CLASS_SUPER_NAME (implementation_template);
|
||
if (my_super_id)
|
||
{
|
||
add_class_reference (my_super_id);
|
||
|
||
/* Compute "my_root_id" - this is required for code generation.
|
||
the "isa" for all meta class structures points to the root of
|
||
the inheritance hierarchy (e.g. "__Object")... */
|
||
my_root_id = my_super_id;
|
||
do
|
||
{
|
||
tree my_root_int = lookup_interface (my_root_id);
|
||
|
||
if (my_root_int && CLASS_SUPER_NAME (my_root_int))
|
||
my_root_id = CLASS_SUPER_NAME (my_root_int);
|
||
else
|
||
break;
|
||
}
|
||
while (1);
|
||
}
|
||
else
|
||
/* No super class. */
|
||
my_root_id = CLASS_NAME (implementation_template);
|
||
|
||
cast_type = build_pointer_type (objc_class_template);
|
||
name_expr = add_objc_string (CLASS_NAME (implementation_template),
|
||
class_names);
|
||
|
||
/* Install class `isa' and `super' pointers at runtime. */
|
||
if (my_super_id)
|
||
{
|
||
super_expr = add_objc_string (my_super_id, class_names);
|
||
super_expr = build_c_cast (cast_type, super_expr); /* cast! */
|
||
}
|
||
else
|
||
super_expr = build_int_cst (NULL_TREE, 0);
|
||
|
||
root_expr = add_objc_string (my_root_id, class_names);
|
||
root_expr = build_c_cast (cast_type, root_expr); /* cast! */
|
||
|
||
if (CLASS_PROTOCOL_LIST (implementation_template))
|
||
{
|
||
generate_protocol_references
|
||
(CLASS_PROTOCOL_LIST (implementation_template));
|
||
protocol_decl = generate_protocol_list (implementation_template);
|
||
}
|
||
else
|
||
protocol_decl = 0;
|
||
|
||
/* static struct objc_class _OBJC_METACLASS_Foo = { ... }; */
|
||
|
||
sc_spec = build_tree_list (NULL_TREE, ridpointers[(int) RID_STATIC]);
|
||
decl_specs = tree_cons (NULL_TREE, objc_class_template, sc_spec);
|
||
|
||
decl = start_var_decl (objc_class_template,
|
||
IDENTIFIER_POINTER
|
||
(DECL_NAME (UOBJC_METACLASS_decl)));
|
||
|
||
initlist
|
||
= build_shared_structure_initializer
|
||
(TREE_TYPE (decl),
|
||
root_expr, super_expr, name_expr,
|
||
convert (integer_type_node, TYPE_SIZE_UNIT (objc_class_template)),
|
||
2 /*CLS_META*/,
|
||
UOBJC_CLASS_METHODS_decl,
|
||
UOBJC_CLASS_VARIABLES_decl,
|
||
protocol_decl);
|
||
|
||
finish_var_decl (decl, initlist);
|
||
|
||
/* static struct objc_class _OBJC_CLASS_Foo={ ... }; */
|
||
|
||
decl = start_var_decl (objc_class_template,
|
||
IDENTIFIER_POINTER
|
||
(DECL_NAME (UOBJC_CLASS_decl)));
|
||
|
||
initlist
|
||
= build_shared_structure_initializer
|
||
(TREE_TYPE (decl),
|
||
build_unary_op (ADDR_EXPR, UOBJC_METACLASS_decl, 0),
|
||
super_expr, name_expr,
|
||
convert (integer_type_node,
|
||
TYPE_SIZE_UNIT (CLASS_STATIC_TEMPLATE
|
||
(implementation_template))),
|
||
1 /*CLS_FACTORY*/ | cls_flags,
|
||
UOBJC_INSTANCE_METHODS_decl,
|
||
UOBJC_INSTANCE_VARIABLES_decl,
|
||
protocol_decl);
|
||
|
||
finish_var_decl (decl, initlist);
|
||
}
|
||
|
||
|
||
static const char *
|
||
synth_id_with_class_suffix (const char *preamble, tree ctxt)
|
||
{
|
||
static char string[BUFSIZE];
|
||
|
||
if (TREE_CODE (ctxt) == CLASS_IMPLEMENTATION_TYPE
|
||
|| TREE_CODE (ctxt) == CLASS_INTERFACE_TYPE)
|
||
{
|
||
sprintf (string, "%s_%s", preamble,
|
||
IDENTIFIER_POINTER (CLASS_NAME (ctxt)));
|
||
}
|
||
else if (TREE_CODE (ctxt) == CATEGORY_IMPLEMENTATION_TYPE
|
||
|| TREE_CODE (ctxt) == CATEGORY_INTERFACE_TYPE)
|
||
{
|
||
/* We have a category. */
|
||
const char *const class_name
|
||
= IDENTIFIER_POINTER (CLASS_NAME (objc_implementation_context));
|
||
const char *const class_super_name
|
||
= IDENTIFIER_POINTER (CLASS_SUPER_NAME (objc_implementation_context));
|
||
sprintf (string, "%s_%s_%s", preamble, class_name, class_super_name);
|
||
}
|
||
else if (TREE_CODE (ctxt) == PROTOCOL_INTERFACE_TYPE)
|
||
{
|
||
const char *protocol_name = IDENTIFIER_POINTER (PROTOCOL_NAME (ctxt));
|
||
sprintf (string, "%s_%s", preamble, protocol_name);
|
||
}
|
||
else
|
||
abort ();
|
||
|
||
return string;
|
||
}
|
||
|
||
/* If type is empty or only type qualifiers are present, add default
|
||
type of id (otherwise grokdeclarator will default to int). */
|
||
|
||
static tree
|
||
adjust_type_for_id_default (tree type)
|
||
{
|
||
if (!type)
|
||
type = make_node (TREE_LIST);
|
||
|
||
if (!TREE_VALUE (type))
|
||
TREE_VALUE (type) = objc_object_type;
|
||
else if (TREE_CODE (TREE_VALUE (type)) == RECORD_TYPE
|
||
&& TYPED_OBJECT (TREE_VALUE (type)))
|
||
error ("can not use an object as parameter to a method");
|
||
|
||
return type;
|
||
}
|
||
|
||
/* Usage:
|
||
keyworddecl:
|
||
selector ':' '(' typename ')' identifier
|
||
|
||
Purpose:
|
||
Transform an Objective-C keyword argument into
|
||
the C equivalent parameter declarator.
|
||
|
||
In: key_name, an "identifier_node" (optional).
|
||
arg_type, a "tree_list" (optional).
|
||
arg_name, an "identifier_node".
|
||
|
||
Note: It would be really nice to strongly type the preceding
|
||
arguments in the function prototype; however, then I
|
||
could not use the "accessor" macros defined in "tree.h".
|
||
|
||
Out: an instance of "keyword_decl". */
|
||
|
||
tree
|
||
objc_build_keyword_decl (tree key_name, tree arg_type, tree arg_name)
|
||
{
|
||
tree keyword_decl;
|
||
|
||
/* If no type is specified, default to "id". */
|
||
arg_type = adjust_type_for_id_default (arg_type);
|
||
|
||
keyword_decl = make_node (KEYWORD_DECL);
|
||
|
||
TREE_TYPE (keyword_decl) = arg_type;
|
||
KEYWORD_ARG_NAME (keyword_decl) = arg_name;
|
||
KEYWORD_KEY_NAME (keyword_decl) = key_name;
|
||
|
||
return keyword_decl;
|
||
}
|
||
|
||
/* Given a chain of keyword_decl's, synthesize the full keyword selector. */
|
||
|
||
static tree
|
||
build_keyword_selector (tree selector)
|
||
{
|
||
int len = 0;
|
||
tree key_chain, key_name;
|
||
char *buf;
|
||
|
||
/* Scan the selector to see how much space we'll need. */
|
||
for (key_chain = selector; key_chain; key_chain = TREE_CHAIN (key_chain))
|
||
{
|
||
if (TREE_CODE (selector) == KEYWORD_DECL)
|
||
key_name = KEYWORD_KEY_NAME (key_chain);
|
||
else if (TREE_CODE (selector) == TREE_LIST)
|
||
key_name = TREE_PURPOSE (key_chain);
|
||
else
|
||
abort ();
|
||
|
||
if (key_name)
|
||
len += IDENTIFIER_LENGTH (key_name) + 1;
|
||
else
|
||
/* Just a ':' arg. */
|
||
len++;
|
||
}
|
||
|
||
buf = (char *) alloca (len + 1);
|
||
/* Start the buffer out as an empty string. */
|
||
buf[0] = '\0';
|
||
|
||
for (key_chain = selector; key_chain; key_chain = TREE_CHAIN (key_chain))
|
||
{
|
||
if (TREE_CODE (selector) == KEYWORD_DECL)
|
||
key_name = KEYWORD_KEY_NAME (key_chain);
|
||
else if (TREE_CODE (selector) == TREE_LIST)
|
||
{
|
||
key_name = TREE_PURPOSE (key_chain);
|
||
/* The keyword decl chain will later be used as a function argument
|
||
chain. Unhook the selector itself so as to not confuse other
|
||
parts of the compiler. */
|
||
TREE_PURPOSE (key_chain) = NULL_TREE;
|
||
}
|
||
else
|
||
abort ();
|
||
|
||
if (key_name)
|
||
strcat (buf, IDENTIFIER_POINTER (key_name));
|
||
strcat (buf, ":");
|
||
}
|
||
|
||
return get_identifier (buf);
|
||
}
|
||
|
||
/* Used for declarations and definitions. */
|
||
|
||
static tree
|
||
build_method_decl (enum tree_code code, tree ret_type, tree selector,
|
||
tree add_args, bool ellipsis)
|
||
{
|
||
tree method_decl;
|
||
|
||
/* If no type is specified, default to "id". */
|
||
ret_type = adjust_type_for_id_default (ret_type);
|
||
|
||
method_decl = make_node (code);
|
||
TREE_TYPE (method_decl) = ret_type;
|
||
|
||
/* If we have a keyword selector, create an identifier_node that
|
||
represents the full selector name (`:' included)... */
|
||
if (TREE_CODE (selector) == KEYWORD_DECL)
|
||
{
|
||
METHOD_SEL_NAME (method_decl) = build_keyword_selector (selector);
|
||
METHOD_SEL_ARGS (method_decl) = selector;
|
||
METHOD_ADD_ARGS (method_decl) = add_args;
|
||
METHOD_ADD_ARGS_ELLIPSIS_P (method_decl) = ellipsis;
|
||
}
|
||
else
|
||
{
|
||
METHOD_SEL_NAME (method_decl) = selector;
|
||
METHOD_SEL_ARGS (method_decl) = NULL_TREE;
|
||
METHOD_ADD_ARGS (method_decl) = NULL_TREE;
|
||
}
|
||
|
||
return method_decl;
|
||
}
|
||
|
||
#define METHOD_DEF 0
|
||
#define METHOD_REF 1
|
||
|
||
/* Used by `build_objc_method_call' and `comp_proto_with_proto'. Return
|
||
an argument list for method METH. 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; this makes a
|
||
difference for the NeXT calling sequence in which the lookup and
|
||
the method call are done together. If METH is null, user-defined
|
||
arguments (i.e., beyond self and _cmd) shall be represented by `...'. */
|
||
|
||
static tree
|
||
get_arg_type_list (tree meth, int context, int superflag)
|
||
{
|
||
tree arglist, akey;
|
||
|
||
/* Receiver type. */
|
||
if (flag_next_runtime && superflag)
|
||
arglist = build_tree_list (NULL_TREE, objc_super_type);
|
||
else if (context == METHOD_DEF && TREE_CODE (meth) == INSTANCE_METHOD_DECL)
|
||
arglist = build_tree_list (NULL_TREE, objc_instance_type);
|
||
else
|
||
arglist = build_tree_list (NULL_TREE, objc_object_type);
|
||
|
||
/* Selector type - will eventually change to `int'. */
|
||
chainon (arglist, build_tree_list (NULL_TREE, objc_selector_type));
|
||
|
||
/* No actual method prototype given -- assume that remaining arguments
|
||
are `...'. */
|
||
if (!meth)
|
||
return arglist;
|
||
|
||
/* Build a list of argument types. */
|
||
for (akey = METHOD_SEL_ARGS (meth); akey; akey = TREE_CHAIN (akey))
|
||
{
|
||
tree arg_type = TREE_VALUE (TREE_TYPE (akey));
|
||
|
||
/* Decay arrays and functions into pointers. */
|
||
if (TREE_CODE (arg_type) == ARRAY_TYPE)
|
||
arg_type = build_pointer_type (TREE_TYPE (arg_type));
|
||
else if (TREE_CODE (arg_type) == FUNCTION_TYPE)
|
||
arg_type = build_pointer_type (arg_type);
|
||
|
||
chainon (arglist, build_tree_list (NULL_TREE, arg_type));
|
||
}
|
||
|
||
if (METHOD_ADD_ARGS (meth))
|
||
{
|
||
for (akey = TREE_CHAIN (METHOD_ADD_ARGS (meth));
|
||
akey; akey = TREE_CHAIN (akey))
|
||
{
|
||
tree arg_type = TREE_TYPE (TREE_VALUE (akey));
|
||
|
||
chainon (arglist, build_tree_list (NULL_TREE, arg_type));
|
||
}
|
||
|
||
if (!METHOD_ADD_ARGS_ELLIPSIS_P (meth))
|
||
goto lack_of_ellipsis;
|
||
}
|
||
else
|
||
{
|
||
lack_of_ellipsis:
|
||
chainon (arglist, OBJC_VOID_AT_END);
|
||
}
|
||
|
||
return arglist;
|
||
}
|
||
|
||
static tree
|
||
check_duplicates (hash hsh, int methods, int is_class)
|
||
{
|
||
tree meth = NULL_TREE;
|
||
|
||
if (hsh)
|
||
{
|
||
meth = hsh->key;
|
||
|
||
if (hsh->list)
|
||
{
|
||
/* We have two or more methods with the same name but
|
||
different types. */
|
||
attr loop;
|
||
|
||
/* But just how different are those types? If
|
||
-Wno-strict-selector-match is specified, we shall not
|
||
complain if the differences are solely among types with
|
||
identical size and alignment. */
|
||
if (!warn_strict_selector_match)
|
||
{
|
||
for (loop = hsh->list; loop; loop = loop->next)
|
||
if (!comp_proto_with_proto (meth, loop->value, 0))
|
||
goto issue_warning;
|
||
|
||
return meth;
|
||
}
|
||
|
||
issue_warning:
|
||
warning (0, "multiple %s named %<%c%s%> found",
|
||
methods ? "methods" : "selectors",
|
||
(is_class ? '+' : '-'),
|
||
IDENTIFIER_POINTER (METHOD_SEL_NAME (meth)));
|
||
|
||
warn_with_method (methods ? "using" : "found",
|
||
((TREE_CODE (meth) == INSTANCE_METHOD_DECL)
|
||
? '-'
|
||
: '+'),
|
||
meth);
|
||
for (loop = hsh->list; loop; loop = loop->next)
|
||
warn_with_method ("also found",
|
||
((TREE_CODE (loop->value) == INSTANCE_METHOD_DECL)
|
||
? '-'
|
||
: '+'),
|
||
loop->value);
|
||
}
|
||
}
|
||
return meth;
|
||
}
|
||
|
||
/* If RECEIVER is a class reference, return the identifier node for
|
||
the referenced class. RECEIVER is created by objc_get_class_reference,
|
||
so we check the exact form created depending on which runtimes are
|
||
used. */
|
||
|
||
static tree
|
||
receiver_is_class_object (tree receiver, int self, int super)
|
||
{
|
||
tree chain, exp, arg;
|
||
|
||
/* The receiver is 'self' or 'super' in the context of a class method. */
|
||
if (objc_method_context
|
||
&& TREE_CODE (objc_method_context) == CLASS_METHOD_DECL
|
||
&& (self || super))
|
||
return (super
|
||
? CLASS_SUPER_NAME (implementation_template)
|
||
: CLASS_NAME (implementation_template));
|
||
|
||
if (flag_next_runtime)
|
||
{
|
||
/* The receiver is a variable created by
|
||
build_class_reference_decl. */
|
||
if (TREE_CODE (receiver) == VAR_DECL && IS_CLASS (TREE_TYPE (receiver)))
|
||
/* Look up the identifier. */
|
||
for (chain = cls_ref_chain; chain; chain = TREE_CHAIN (chain))
|
||
if (TREE_PURPOSE (chain) == receiver)
|
||
return TREE_VALUE (chain);
|
||
}
|
||
|
||
/* The receiver is a function call that returns an id. Check if
|
||
it is a call to objc_getClass, if so, pick up the class name. */
|
||
if (TREE_CODE (receiver) == CALL_EXPR
|
||
&& (exp = TREE_OPERAND (receiver, 0))
|
||
&& TREE_CODE (exp) == ADDR_EXPR
|
||
&& (exp = TREE_OPERAND (exp, 0))
|
||
&& TREE_CODE (exp) == FUNCTION_DECL
|
||
/* For some reason, we sometimes wind up with multiple FUNCTION_DECL
|
||
prototypes for objc_get_class(). Thankfully, they seem to share the
|
||
same function type. */
|
||
&& TREE_TYPE (exp) == TREE_TYPE (objc_get_class_decl)
|
||
&& !strcmp (IDENTIFIER_POINTER (DECL_NAME (exp)), TAG_GETCLASS)
|
||
/* We have a call to objc_get_class/objc_getClass! */
|
||
&& (arg = TREE_OPERAND (receiver, 1))
|
||
&& TREE_CODE (arg) == TREE_LIST
|
||
&& (arg = TREE_VALUE (arg)))
|
||
{
|
||
STRIP_NOPS (arg);
|
||
if (TREE_CODE (arg) == ADDR_EXPR
|
||
&& (arg = TREE_OPERAND (arg, 0))
|
||
&& TREE_CODE (arg) == STRING_CST)
|
||
/* Finally, we have the class name. */
|
||
return get_identifier (TREE_STRING_POINTER (arg));
|
||
}
|
||
return 0;
|
||
}
|
||
|
||
/* If we are currently building a message expr, this holds
|
||
the identifier of the selector of the message. This is
|
||
used when printing warnings about argument mismatches. */
|
||
|
||
static tree current_objc_message_selector = 0;
|
||
|
||
tree
|
||
objc_message_selector (void)
|
||
{
|
||
return current_objc_message_selector;
|
||
}
|
||
|
||
/* Construct an expression for sending a message.
|
||
MESS has the object to send to in TREE_PURPOSE
|
||
and the argument list (including selector) in TREE_VALUE.
|
||
|
||
(*(<abstract_decl>(*)())_msg)(receiver, selTransTbl[n], ...);
|
||
(*(<abstract_decl>(*)())_msgSuper)(receiver, selTransTbl[n], ...); */
|
||
|
||
tree
|
||
objc_build_message_expr (tree mess)
|
||
{
|
||
tree receiver = TREE_PURPOSE (mess);
|
||
tree sel_name;
|
||
#ifdef OBJCPLUS
|
||
tree args = TREE_PURPOSE (TREE_VALUE (mess));
|
||
#else
|
||
tree args = TREE_VALUE (mess);
|
||
#endif
|
||
tree method_params = NULL_TREE;
|
||
|
||
if (TREE_CODE (receiver) == ERROR_MARK)
|
||
return error_mark_node;
|
||
|
||
/* Obtain the full selector name. */
|
||
if (TREE_CODE (args) == IDENTIFIER_NODE)
|
||
/* A unary selector. */
|
||
sel_name = args;
|
||
else if (TREE_CODE (args) == TREE_LIST)
|
||
sel_name = build_keyword_selector (args);
|
||
else
|
||
abort ();
|
||
|
||
/* Build the parameter list to give to the method. */
|
||
if (TREE_CODE (args) == TREE_LIST)
|
||
#ifdef OBJCPLUS
|
||
method_params = chainon (args, TREE_VALUE (TREE_VALUE (mess)));
|
||
#else
|
||
{
|
||
tree chain = args, prev = NULL_TREE;
|
||
|
||
/* We have a keyword selector--check for comma expressions. */
|
||
while (chain)
|
||
{
|
||
tree element = TREE_VALUE (chain);
|
||
|
||
/* We have a comma expression, must collapse... */
|
||
if (TREE_CODE (element) == TREE_LIST)
|
||
{
|
||
if (prev)
|
||
TREE_CHAIN (prev) = element;
|
||
else
|
||
args = element;
|
||
}
|
||
prev = chain;
|
||
chain = TREE_CHAIN (chain);
|
||
}
|
||
method_params = args;
|
||
}
|
||
#endif
|
||
|
||
#ifdef OBJCPLUS
|
||
if (processing_template_decl)
|
||
/* Must wait until template instantiation time. */
|
||
return build_min_nt (MESSAGE_SEND_EXPR, receiver, sel_name,
|
||
method_params);
|
||
#endif
|
||
|
||
return objc_finish_message_expr (receiver, sel_name, method_params);
|
||
}
|
||
|
||
/* Look up method SEL_NAME that would be suitable for receiver
|
||
of type 'id' (if IS_CLASS is zero) or 'Class' (if IS_CLASS is
|
||
nonzero), and report on any duplicates. */
|
||
|
||
static tree
|
||
lookup_method_in_hash_lists (tree sel_name, int is_class)
|
||
{
|
||
hash method_prototype = NULL;
|
||
|
||
if (!is_class)
|
||
method_prototype = hash_lookup (nst_method_hash_list,
|
||
sel_name);
|
||
|
||
if (!method_prototype)
|
||
{
|
||
method_prototype = hash_lookup (cls_method_hash_list,
|
||
sel_name);
|
||
is_class = 1;
|
||
}
|
||
|
||
return check_duplicates (method_prototype, 1, is_class);
|
||
}
|
||
|
||
/* The 'objc_finish_message_expr' routine is called from within
|
||
'objc_build_message_expr' for non-template functions. In the case of
|
||
C++ template functions, it is called from 'build_expr_from_tree'
|
||
(in decl2.c) after RECEIVER and METHOD_PARAMS have been expanded. */
|
||
|
||
tree
|
||
objc_finish_message_expr (tree receiver, tree sel_name, tree method_params)
|
||
{
|
||
tree method_prototype = NULL_TREE, rprotos = NULL_TREE, rtype;
|
||
tree selector, retval, class_tree;
|
||
int self, super, have_cast;
|
||
|
||
/* Extract the receiver of the message, as well as its type
|
||
(where the latter may take the form of a cast or be inferred
|
||
from the implementation context). */
|
||
rtype = receiver;
|
||
while (TREE_CODE (rtype) == COMPOUND_EXPR
|
||
|| TREE_CODE (rtype) == MODIFY_EXPR
|
||
|| TREE_CODE (rtype) == NOP_EXPR
|
||
|| TREE_CODE (rtype) == CONVERT_EXPR
|
||
|| TREE_CODE (rtype) == COMPONENT_REF)
|
||
rtype = TREE_OPERAND (rtype, 0);
|
||
self = (rtype == self_decl);
|
||
super = (rtype == UOBJC_SUPER_decl);
|
||
rtype = TREE_TYPE (receiver);
|
||
have_cast = (TREE_CODE (receiver) == NOP_EXPR
|
||
|| (TREE_CODE (receiver) == COMPOUND_EXPR
|
||
&& !IS_SUPER (rtype)));
|
||
|
||
/* If we are calling [super dealloc], reset our warning flag. */
|
||
if (super && !strcmp ("dealloc", IDENTIFIER_POINTER (sel_name)))
|
||
should_call_super_dealloc = 0;
|
||
|
||
/* If the receiver is a class object, retrieve the corresponding
|
||
@interface, if one exists. */
|
||
class_tree = receiver_is_class_object (receiver, self, super);
|
||
|
||
/* Now determine the receiver type (if an explicit cast has not been
|
||
provided). */
|
||
if (!have_cast)
|
||
{
|
||
if (class_tree)
|
||
rtype = lookup_interface (class_tree);
|
||
/* Handle `self' and `super'. */
|
||
else if (super)
|
||
{
|
||
if (!CLASS_SUPER_NAME (implementation_template))
|
||
{
|
||
error ("no super class declared in @interface for %qs",
|
||
IDENTIFIER_POINTER (CLASS_NAME (implementation_template)));
|
||
return error_mark_node;
|
||
}
|
||
rtype = lookup_interface (CLASS_SUPER_NAME (implementation_template));
|
||
}
|
||
else if (self)
|
||
rtype = lookup_interface (CLASS_NAME (implementation_template));
|
||
}
|
||
|
||
/* If receiver is of type `id' or `Class' (or if the @interface for a
|
||
class is not visible), we shall be satisfied with the existence of
|
||
any instance or class method. */
|
||
if (objc_is_id (rtype))
|
||
{
|
||
class_tree = (IS_CLASS (rtype) ? objc_class_name : NULL_TREE);
|
||
rprotos = (TYPE_HAS_OBJC_INFO (TREE_TYPE (rtype))
|
||
? TYPE_OBJC_PROTOCOL_LIST (TREE_TYPE (rtype))
|
||
: NULL_TREE);
|
||
rtype = NULL_TREE;
|
||
|
||
if (rprotos)
|
||
{
|
||
/* If messaging 'id <Protos>' or 'Class <Proto>', first search
|
||
in protocols themselves for the method prototype. */
|
||
method_prototype
|
||
= lookup_method_in_protocol_list (rprotos, sel_name,
|
||
class_tree != NULL_TREE);
|
||
|
||
/* If messaging 'Class <Proto>' but did not find a class method
|
||
prototype, search for an instance method instead, and warn
|
||
about having done so. */
|
||
if (!method_prototype && !rtype && class_tree != NULL_TREE)
|
||
{
|
||
method_prototype
|
||
= lookup_method_in_protocol_list (rprotos, sel_name, 0);
|
||
|
||
if (method_prototype)
|
||
warning (0, "found %<-%s%> instead of %<+%s%> in protocol(s)",
|
||
IDENTIFIER_POINTER (sel_name),
|
||
IDENTIFIER_POINTER (sel_name));
|
||
}
|
||
}
|
||
}
|
||
else if (rtype)
|
||
{
|
||
tree orig_rtype = rtype, saved_rtype;
|
||
|
||
if (TREE_CODE (rtype) == POINTER_TYPE)
|
||
rtype = TREE_TYPE (rtype);
|
||
/* Traverse typedef aliases */
|
||
while (TREE_CODE (rtype) == RECORD_TYPE && OBJC_TYPE_NAME (rtype)
|
||
&& TREE_CODE (OBJC_TYPE_NAME (rtype)) == TYPE_DECL
|
||
&& DECL_ORIGINAL_TYPE (OBJC_TYPE_NAME (rtype)))
|
||
rtype = DECL_ORIGINAL_TYPE (OBJC_TYPE_NAME (rtype));
|
||
saved_rtype = rtype;
|
||
if (TYPED_OBJECT (rtype))
|
||
{
|
||
rprotos = TYPE_OBJC_PROTOCOL_LIST (rtype);
|
||
rtype = TYPE_OBJC_INTERFACE (rtype);
|
||
}
|
||
/* If we could not find an @interface declaration, we must have
|
||
only seen a @class declaration; so, we cannot say anything
|
||
more intelligent about which methods the receiver will
|
||
understand. */
|
||
if (!rtype || TREE_CODE (rtype) == IDENTIFIER_NODE)
|
||
rtype = NULL_TREE;
|
||
else if (TREE_CODE (rtype) == CLASS_INTERFACE_TYPE
|
||
|| TREE_CODE (rtype) == CLASS_IMPLEMENTATION_TYPE)
|
||
{
|
||
/* We have a valid ObjC class name. Look up the method name
|
||
in the published @interface for the class (and its
|
||
superclasses). */
|
||
method_prototype
|
||
= lookup_method_static (rtype, sel_name, class_tree != NULL_TREE);
|
||
|
||
/* If the method was not found in the @interface, it may still
|
||
exist locally as part of the @implementation. */
|
||
if (!method_prototype && objc_implementation_context
|
||
&& CLASS_NAME (objc_implementation_context)
|
||
== OBJC_TYPE_NAME (rtype))
|
||
method_prototype
|
||
= lookup_method
|
||
((class_tree
|
||
? CLASS_CLS_METHODS (objc_implementation_context)
|
||
: CLASS_NST_METHODS (objc_implementation_context)),
|
||
sel_name);
|
||
|
||
/* If we haven't found a candidate method by now, try looking for
|
||
it in the protocol list. */
|
||
if (!method_prototype && rprotos)
|
||
method_prototype
|
||
= lookup_method_in_protocol_list (rprotos, sel_name,
|
||
class_tree != NULL_TREE);
|
||
}
|
||
else
|
||
{
|
||
warning (0, "invalid receiver type %qs",
|
||
gen_type_name (orig_rtype));
|
||
/* After issuing the "invalid receiver" warning, perform method
|
||
lookup as if we were messaging 'id'. */
|
||
rtype = rprotos = NULL_TREE;
|
||
}
|
||
}
|
||
|
||
|
||
/* For 'id' or 'Class' receivers, search in the global hash table
|
||
as a last resort. For all receivers, warn if protocol searches
|
||
have failed. */
|
||
if (!method_prototype)
|
||
{
|
||
if (rprotos)
|
||
warning (0, "%<%c%s%> not found in protocol(s)",
|
||
(class_tree ? '+' : '-'),
|
||
IDENTIFIER_POINTER (sel_name));
|
||
|
||
if (!rtype)
|
||
method_prototype
|
||
= lookup_method_in_hash_lists (sel_name, class_tree != NULL_TREE);
|
||
}
|
||
|
||
if (!method_prototype)
|
||
{
|
||
static bool warn_missing_methods = false;
|
||
|
||
if (rtype)
|
||
warning (0, "%qs may not respond to %<%c%s%>",
|
||
IDENTIFIER_POINTER (OBJC_TYPE_NAME (rtype)),
|
||
(class_tree ? '+' : '-'),
|
||
IDENTIFIER_POINTER (sel_name));
|
||
/* If we are messaging an 'id' or 'Class' object and made it here,
|
||
then we have failed to find _any_ instance or class method,
|
||
respectively. */
|
||
else
|
||
warning (0, "no %<%c%s%> method found",
|
||
(class_tree ? '+' : '-'),
|
||
IDENTIFIER_POINTER (sel_name));
|
||
|
||
if (!warn_missing_methods)
|
||
{
|
||
warning (0, "(Messages without a matching method signature");
|
||
warning (0, "will be assumed to return %<id%> and accept");
|
||
warning (0, "%<...%> as arguments.)");
|
||
warn_missing_methods = true;
|
||
}
|
||
}
|
||
|
||
/* Save the selector name for printing error messages. */
|
||
current_objc_message_selector = sel_name;
|
||
|
||
/* Build the parameters list for looking up the method.
|
||
These are the object itself and the selector. */
|
||
|
||
if (flag_typed_selectors)
|
||
selector = build_typed_selector_reference (sel_name, method_prototype);
|
||
else
|
||
selector = build_selector_reference (sel_name);
|
||
|
||
retval = build_objc_method_call (super, method_prototype,
|
||
receiver,
|
||
selector, method_params);
|
||
|
||
current_objc_message_selector = 0;
|
||
|
||
return retval;
|
||
}
|
||
|
||
/* 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.)
|
||
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 (int super_flag, tree method_prototype,
|
||
tree lookup_object, tree selector,
|
||
tree method_params)
|
||
{
|
||
tree sender = (super_flag ? umsg_super_decl :
|
||
(!flag_next_runtime || flag_nil_receivers
|
||
? (flag_objc_direct_dispatch
|
||
? umsg_fast_decl
|
||
: umsg_decl)
|
||
: umsg_nonnil_decl));
|
||
tree rcv_p = (super_flag ? objc_super_type : objc_object_type);
|
||
|
||
/* 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 sender_cast
|
||
= build_pointer_type
|
||
(build_function_type
|
||
(ret_type,
|
||
get_arg_type_list
|
||
(method_prototype, METHOD_REF, super_flag)));
|
||
tree method, t;
|
||
|
||
lookup_object = build_c_cast (rcv_p, lookup_object);
|
||
|
||
/* Use SAVE_EXPR to avoid evaluating the receiver twice. */
|
||
lookup_object = save_expr (lookup_object);
|
||
|
||
if (flag_next_runtime)
|
||
{
|
||
/* 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);
|
||
|
||
method_params = tree_cons (NULL_TREE, lookup_object,
|
||
tree_cons (NULL_TREE, selector,
|
||
method_params));
|
||
method = build_fold_addr_expr (sender);
|
||
}
|
||
else
|
||
{
|
||
/* This is the portable (GNU) way. */
|
||
tree object;
|
||
|
||
/* First, call the lookup function to get a pointer to the method,
|
||
then cast the pointer, then call it with the method arguments. */
|
||
|
||
object = (super_flag ? self_decl : lookup_object);
|
||
|
||
t = tree_cons (NULL_TREE, selector, NULL_TREE);
|
||
t = tree_cons (NULL_TREE, lookup_object, t);
|
||
method = build_function_call (sender, t);
|
||
|
||
/* Pass the object to the method. */
|
||
method_params = tree_cons (NULL_TREE, object,
|
||
tree_cons (NULL_TREE, selector,
|
||
method_params));
|
||
}
|
||
|
||
/* ??? Selector is not at this point something we can use inside
|
||
the compiler itself. Set it to garbage for the nonce. */
|
||
t = build3 (OBJ_TYPE_REF, sender_cast, method, lookup_object, size_zero_node);
|
||
return build_function_call (t, method_params);
|
||
}
|
||
|
||
static void
|
||
build_protocol_reference (tree p)
|
||
{
|
||
tree decl;
|
||
const char *proto_name;
|
||
|
||
/* static struct _objc_protocol _OBJC_PROTOCOL_<mumble>; */
|
||
|
||
proto_name = synth_id_with_class_suffix ("_OBJC_PROTOCOL", p);
|
||
decl = start_var_decl (objc_protocol_template, proto_name);
|
||
|
||
PROTOCOL_FORWARD_DECL (p) = decl;
|
||
}
|
||
|
||
/* This function is called by the parser when (and only when) a
|
||
@protocol() expression is found, in order to compile it. */
|
||
tree
|
||
objc_build_protocol_expr (tree protoname)
|
||
{
|
||
tree expr;
|
||
tree p = lookup_protocol (protoname);
|
||
|
||
if (!p)
|
||
{
|
||
error ("cannot find protocol declaration for %qs",
|
||
IDENTIFIER_POINTER (protoname));
|
||
return error_mark_node;
|
||
}
|
||
|
||
if (!PROTOCOL_FORWARD_DECL (p))
|
||
build_protocol_reference (p);
|
||
|
||
expr = build_unary_op (ADDR_EXPR, PROTOCOL_FORWARD_DECL (p), 0);
|
||
|
||
/* ??? Ideally we'd build the reference with objc_protocol_type directly,
|
||
if we have it, rather than converting it here. */
|
||
expr = convert (objc_protocol_type, expr);
|
||
|
||
/* The @protocol() expression is being compiled into a pointer to a
|
||
statically allocated instance of the Protocol class. To become
|
||
usable at runtime, the 'isa' pointer of the instance need to be
|
||
fixed up at runtime by the runtime library, to point to the
|
||
actual 'Protocol' class. */
|
||
|
||
/* For the GNU runtime, put the static Protocol instance in the list
|
||
of statically allocated instances, so that we make sure that its
|
||
'isa' pointer is fixed up at runtime by the GNU runtime library
|
||
to point to the Protocol class (at runtime, when loading the
|
||
module, the GNU runtime library loops on the statically allocated
|
||
instances (as found in the defs field in objc_symtab) and fixups
|
||
all the 'isa' pointers of those objects). */
|
||
if (! flag_next_runtime)
|
||
{
|
||
/* This type is a struct containing the fields of a Protocol
|
||
object. (Cfr. objc_protocol_type instead is the type of a pointer
|
||
to such a struct). */
|
||
tree protocol_struct_type = xref_tag
|
||
(RECORD_TYPE, get_identifier (PROTOCOL_OBJECT_CLASS_NAME));
|
||
tree *chain;
|
||
|
||
/* Look for the list of Protocol statically allocated instances
|
||
to fixup at runtime. Create a new list to hold Protocol
|
||
statically allocated instances, if the list is not found. At
|
||
present there is only another list, holding NSConstantString
|
||
static instances to be fixed up at runtime. */
|
||
for (chain = &objc_static_instances;
|
||
*chain && TREE_VALUE (*chain) != protocol_struct_type;
|
||
chain = &TREE_CHAIN (*chain));
|
||
if (!*chain)
|
||
{
|
||
*chain = tree_cons (NULL_TREE, protocol_struct_type, NULL_TREE);
|
||
add_objc_string (OBJC_TYPE_NAME (protocol_struct_type),
|
||
class_names);
|
||
}
|
||
|
||
/* Add this statically allocated instance to the Protocol list. */
|
||
TREE_PURPOSE (*chain) = tree_cons (NULL_TREE,
|
||
PROTOCOL_FORWARD_DECL (p),
|
||
TREE_PURPOSE (*chain));
|
||
}
|
||
|
||
|
||
return expr;
|
||
}
|
||
|
||
/* This function is called by the parser when a @selector() expression
|
||
is found, in order to compile it. It is only called by the parser
|
||
and only to compile a @selector(). */
|
||
tree
|
||
objc_build_selector_expr (tree selnamelist)
|
||
{
|
||
tree selname;
|
||
|
||
/* Obtain the full selector name. */
|
||
if (TREE_CODE (selnamelist) == IDENTIFIER_NODE)
|
||
/* A unary selector. */
|
||
selname = selnamelist;
|
||
else if (TREE_CODE (selnamelist) == TREE_LIST)
|
||
selname = build_keyword_selector (selnamelist);
|
||
else
|
||
abort ();
|
||
|
||
/* If we are required to check @selector() expressions as they
|
||
are found, check that the selector has been declared. */
|
||
if (warn_undeclared_selector)
|
||
{
|
||
/* Look the selector up in the list of all known class and
|
||
instance methods (up to this line) to check that the selector
|
||
exists. */
|
||
hash hsh;
|
||
|
||
/* First try with instance methods. */
|
||
hsh = hash_lookup (nst_method_hash_list, selname);
|
||
|
||
/* If not found, try with class methods. */
|
||
if (!hsh)
|
||
{
|
||
hsh = hash_lookup (cls_method_hash_list, selname);
|
||
}
|
||
|
||
/* If still not found, print out a warning. */
|
||
if (!hsh)
|
||
{
|
||
warning (0, "undeclared selector %qs", IDENTIFIER_POINTER (selname));
|
||
}
|
||
}
|
||
|
||
|
||
if (flag_typed_selectors)
|
||
return build_typed_selector_reference (selname, 0);
|
||
else
|
||
return build_selector_reference (selname);
|
||
}
|
||
|
||
tree
|
||
objc_build_encode_expr (tree type)
|
||
{
|
||
tree result;
|
||
const char *string;
|
||
|
||
encode_type (type, obstack_object_size (&util_obstack),
|
||
OBJC_ENCODE_INLINE_DEFS);
|
||
obstack_1grow (&util_obstack, 0); /* null terminate string */
|
||
string = obstack_finish (&util_obstack);
|
||
|
||
/* Synthesize a string that represents the encoded struct/union. */
|
||
result = my_build_string (strlen (string) + 1, string);
|
||
obstack_free (&util_obstack, util_firstobj);
|
||
return result;
|
||
}
|
||
|
||
static tree
|
||
build_ivar_reference (tree id)
|
||
{
|
||
if (TREE_CODE (objc_method_context) == CLASS_METHOD_DECL)
|
||
{
|
||
/* Historically, a class method that produced objects (factory
|
||
method) would assign `self' to the instance that it
|
||
allocated. This would effectively turn the class method into
|
||
an instance method. Following this assignment, the instance
|
||
variables could be accessed. That practice, while safe,
|
||
violates the simple rule that a class method should not refer
|
||
to an instance variable. It's better to catch the cases
|
||
where this is done unknowingly than to support the above
|
||
paradigm. */
|
||
warning (0, "instance variable %qs accessed in class method",
|
||
IDENTIFIER_POINTER (id));
|
||
self_decl = convert (objc_instance_type, self_decl); /* cast */
|
||
}
|
||
|
||
return objc_build_component_ref (build_indirect_ref (self_decl, "->"), id);
|
||
}
|
||
|
||
/* Compute a hash value for a given method SEL_NAME. */
|
||
|
||
static size_t
|
||
hash_func (tree sel_name)
|
||
{
|
||
const unsigned char *s
|
||
= (const unsigned char *)IDENTIFIER_POINTER (sel_name);
|
||
size_t h = 0;
|
||
|
||
while (*s)
|
||
h = h * 67 + *s++ - 113;
|
||
return h;
|
||
}
|
||
|
||
static void
|
||
hash_init (void)
|
||
{
|
||
nst_method_hash_list
|
||
= (hash *) ggc_alloc_cleared (SIZEHASHTABLE * sizeof (hash));
|
||
cls_method_hash_list
|
||
= (hash *) ggc_alloc_cleared (SIZEHASHTABLE * sizeof (hash));
|
||
|
||
/* Initialize the hash table used to hold the constant string objects. */
|
||
string_htab = htab_create_ggc (31, string_hash,
|
||
string_eq, NULL);
|
||
|
||
/* Initialize the hash table used to hold EH-volatilized types. */
|
||
volatilized_htab = htab_create_ggc (31, volatilized_hash,
|
||
volatilized_eq, NULL);
|
||
}
|
||
|
||
/* WARNING!!!! hash_enter is called with a method, and will peek
|
||
inside to find its selector! But hash_lookup is given a selector
|
||
directly, and looks for the selector that's inside the found
|
||
entry's key (method) for comparison. */
|
||
|
||
static void
|
||
hash_enter (hash *hashlist, tree method)
|
||
{
|
||
hash obj;
|
||
int slot = hash_func (METHOD_SEL_NAME (method)) % SIZEHASHTABLE;
|
||
|
||
obj = (hash) ggc_alloc (sizeof (struct hashed_entry));
|
||
obj->list = 0;
|
||
obj->next = hashlist[slot];
|
||
obj->key = method;
|
||
|
||
hashlist[slot] = obj; /* append to front */
|
||
}
|
||
|
||
static hash
|
||
hash_lookup (hash *hashlist, tree sel_name)
|
||
{
|
||
hash target;
|
||
|
||
target = hashlist[hash_func (sel_name) % SIZEHASHTABLE];
|
||
|
||
while (target)
|
||
{
|
||
if (sel_name == METHOD_SEL_NAME (target->key))
|
||
return target;
|
||
|
||
target = target->next;
|
||
}
|
||
return 0;
|
||
}
|
||
|
||
static void
|
||
hash_add_attr (hash entry, tree value)
|
||
{
|
||
attr obj;
|
||
|
||
obj = (attr) ggc_alloc (sizeof (struct hashed_attribute));
|
||
obj->next = entry->list;
|
||
obj->value = value;
|
||
|
||
entry->list = obj; /* append to front */
|
||
}
|
||
|
||
static tree
|
||
lookup_method (tree mchain, tree method)
|
||
{
|
||
tree key;
|
||
|
||
if (TREE_CODE (method) == IDENTIFIER_NODE)
|
||
key = method;
|
||
else
|
||
key = METHOD_SEL_NAME (method);
|
||
|
||
while (mchain)
|
||
{
|
||
if (METHOD_SEL_NAME (mchain) == key)
|
||
return mchain;
|
||
|
||
mchain = TREE_CHAIN (mchain);
|
||
}
|
||
return NULL_TREE;
|
||
}
|
||
|
||
/* Look up a class (if OBJC_LOOKUP_CLASS is set in FLAGS) or instance method
|
||
in INTERFACE, along with any categories and protocols attached thereto.
|
||
If method is not found, and the OBJC_LOOKUP_NO_SUPER is _not_ set in FLAGS,
|
||
recursively examine the INTERFACE's superclass. If OBJC_LOOKUP_CLASS is
|
||
set, OBJC_LOOKUP_NO_SUPER is cleared, and no suitable class method could
|
||
be found in INTERFACE or any of its superclasses, look for an _instance_
|
||
method of the same name in the root class as a last resort.
|
||
|
||
If a suitable method cannot be found, return NULL_TREE. */
|
||
|
||
static tree
|
||
lookup_method_static (tree interface, tree ident, int flags)
|
||
{
|
||
tree meth = NULL_TREE, root_inter = NULL_TREE;
|
||
tree inter = interface;
|
||
int is_class = (flags & OBJC_LOOKUP_CLASS);
|
||
int no_superclasses = (flags & OBJC_LOOKUP_NO_SUPER);
|
||
|
||
while (inter)
|
||
{
|
||
tree chain = is_class ? CLASS_CLS_METHODS (inter) : CLASS_NST_METHODS (inter);
|
||
tree category = inter;
|
||
|
||
/* First, look up the method in the class itself. */
|
||
if ((meth = lookup_method (chain, ident)))
|
||
return meth;
|
||
|
||
/* Failing that, look for the method in each category of the class. */
|
||
while ((category = CLASS_CATEGORY_LIST (category)))
|
||
{
|
||
chain = is_class ? CLASS_CLS_METHODS (category) : CLASS_NST_METHODS (category);
|
||
|
||
/* Check directly in each category. */
|
||
if ((meth = lookup_method (chain, ident)))
|
||
return meth;
|
||
|
||
/* Failing that, check in each category's protocols. */
|
||
if (CLASS_PROTOCOL_LIST (category))
|
||
{
|
||
if ((meth = (lookup_method_in_protocol_list
|
||
(CLASS_PROTOCOL_LIST (category), ident, is_class))))
|
||
return meth;
|
||
}
|
||
}
|
||
|
||
/* If not found in categories, check in protocols of the main class. */
|
||
if (CLASS_PROTOCOL_LIST (inter))
|
||
{
|
||
if ((meth = (lookup_method_in_protocol_list
|
||
(CLASS_PROTOCOL_LIST (inter), ident, is_class))))
|
||
return meth;
|
||
}
|
||
|
||
/* If we were instructed not to look in superclasses, don't. */
|
||
if (no_superclasses)
|
||
return NULL_TREE;
|
||
|
||
/* Failing that, climb up the inheritance hierarchy. */
|
||
root_inter = inter;
|
||
inter = lookup_interface (CLASS_SUPER_NAME (inter));
|
||
}
|
||
while (inter);
|
||
|
||
/* If no class (factory) method was found, check if an _instance_
|
||
method of the same name exists in the root class. This is what
|
||
the Objective-C runtime will do. If an instance method was not
|
||
found, return 0. */
|
||
return is_class ? lookup_method_static (root_inter, ident, 0): NULL_TREE;
|
||
}
|
||
|
||
/* Add the method to the hash list if it doesn't contain an identical
|
||
method already. */
|
||
|
||
static void
|
||
add_method_to_hash_list (hash *hash_list, tree method)
|
||
{
|
||
hash hsh;
|
||
|
||
if (!(hsh = hash_lookup (hash_list, METHOD_SEL_NAME (method))))
|
||
{
|
||
/* Install on a global chain. */
|
||
hash_enter (hash_list, method);
|
||
}
|
||
else
|
||
{
|
||
/* Check types against those; if different, add to a list. */
|
||
attr loop;
|
||
int already_there = comp_proto_with_proto (method, hsh->key, 1);
|
||
for (loop = hsh->list; !already_there && loop; loop = loop->next)
|
||
already_there |= comp_proto_with_proto (method, loop->value, 1);
|
||
if (!already_there)
|
||
hash_add_attr (hsh, method);
|
||
}
|
||
}
|
||
|
||
static tree
|
||
objc_add_method (tree class, tree method, int is_class)
|
||
{
|
||
tree mth;
|
||
|
||
if (!(mth = lookup_method (is_class
|
||
? CLASS_CLS_METHODS (class)
|
||
: CLASS_NST_METHODS (class), method)))
|
||
{
|
||
/* put method on list in reverse order */
|
||
if (is_class)
|
||
{
|
||
TREE_CHAIN (method) = CLASS_CLS_METHODS (class);
|
||
CLASS_CLS_METHODS (class) = method;
|
||
}
|
||
else
|
||
{
|
||
TREE_CHAIN (method) = CLASS_NST_METHODS (class);
|
||
CLASS_NST_METHODS (class) = method;
|
||
}
|
||
}
|
||
else
|
||
{
|
||
/* When processing an @interface for a class or category, give hard
|
||
errors on methods with identical selectors but differing argument
|
||
and/or return types. We do not do this for @implementations, because
|
||
C/C++ will do it for us (i.e., there will be duplicate function
|
||
definition errors). */
|
||
if ((TREE_CODE (class) == CLASS_INTERFACE_TYPE
|
||
|| TREE_CODE (class) == CATEGORY_INTERFACE_TYPE)
|
||
&& !comp_proto_with_proto (method, mth, 1))
|
||
error ("duplicate declaration of method %<%c%s%>",
|
||
is_class ? '+' : '-',
|
||
IDENTIFIER_POINTER (METHOD_SEL_NAME (mth)));
|
||
}
|
||
|
||
if (is_class)
|
||
add_method_to_hash_list (cls_method_hash_list, method);
|
||
else
|
||
{
|
||
add_method_to_hash_list (nst_method_hash_list, method);
|
||
|
||
/* Instance methods in root classes (and categories thereof)
|
||
may act as class methods as a last resort. We also add
|
||
instance methods listed in @protocol declarations to
|
||
the class hash table, on the assumption that @protocols
|
||
may be adopted by root classes or categories. */
|
||
if (TREE_CODE (class) == CATEGORY_INTERFACE_TYPE
|
||
|| TREE_CODE (class) == CATEGORY_IMPLEMENTATION_TYPE)
|
||
class = lookup_interface (CLASS_NAME (class));
|
||
|
||
if (TREE_CODE (class) == PROTOCOL_INTERFACE_TYPE
|
||
|| !CLASS_SUPER_NAME (class))
|
||
add_method_to_hash_list (cls_method_hash_list, method);
|
||
}
|
||
|
||
return method;
|
||
}
|
||
|
||
static tree
|
||
add_class (tree class_name, tree name)
|
||
{
|
||
struct interface_tuple **slot;
|
||
|
||
/* Put interfaces on list in reverse order. */
|
||
TREE_CHAIN (class_name) = interface_chain;
|
||
interface_chain = class_name;
|
||
|
||
if (interface_htab == NULL)
|
||
interface_htab = htab_create_ggc (31, hash_interface, eq_interface, NULL);
|
||
slot = (struct interface_tuple **)
|
||
htab_find_slot_with_hash (interface_htab, name,
|
||
IDENTIFIER_HASH_VALUE (name),
|
||
INSERT);
|
||
if (!*slot)
|
||
{
|
||
*slot = (struct interface_tuple *) ggc_alloc_cleared (sizeof (struct interface_tuple));
|
||
(*slot)->id = name;
|
||
}
|
||
(*slot)->class_name = class_name;
|
||
|
||
return interface_chain;
|
||
}
|
||
|
||
static void
|
||
add_category (tree class, tree category)
|
||
{
|
||
/* Put categories on list in reverse order. */
|
||
tree cat = lookup_category (class, CLASS_SUPER_NAME (category));
|
||
|
||
if (cat)
|
||
{
|
||
warning (0, "duplicate interface declaration for category %<%s(%s)%>",
|
||
IDENTIFIER_POINTER (CLASS_NAME (class)),
|
||
IDENTIFIER_POINTER (CLASS_SUPER_NAME (category)));
|
||
}
|
||
else
|
||
{
|
||
CLASS_CATEGORY_LIST (category) = CLASS_CATEGORY_LIST (class);
|
||
CLASS_CATEGORY_LIST (class) = category;
|
||
}
|
||
}
|
||
|
||
/* Called after parsing each instance variable declaration. Necessary to
|
||
preserve typedefs and implement public/private...
|
||
|
||
PUBLIC is 1 for public, 0 for protected, and 2 for private. */
|
||
|
||
static tree
|
||
add_instance_variable (tree class, int public, tree field_decl)
|
||
{
|
||
tree field_type = TREE_TYPE (field_decl);
|
||
const char *ivar_name = DECL_NAME (field_decl)
|
||
? IDENTIFIER_POINTER (DECL_NAME (field_decl))
|
||
: "<unnamed>";
|
||
|
||
#ifdef OBJCPLUS
|
||
if (TREE_CODE (field_type) == REFERENCE_TYPE)
|
||
{
|
||
error ("illegal reference type specified for instance variable %qs",
|
||
ivar_name);
|
||
/* Return class as is without adding this ivar. */
|
||
return class;
|
||
}
|
||
#endif
|
||
|
||
if (field_type == error_mark_node || !TYPE_SIZE (field_type)
|
||
|| TYPE_SIZE (field_type) == error_mark_node)
|
||
/* 'type[0]' is allowed, but 'type[]' is not! */
|
||
{
|
||
error ("instance variable %qs has unknown size", ivar_name);
|
||
/* Return class as is without adding this ivar. */
|
||
return class;
|
||
}
|
||
|
||
#ifdef OBJCPLUS
|
||
/* Check if the ivar being added has a non-POD C++ type. If so, we will
|
||
need to either (1) warn the user about it or (2) generate suitable
|
||
constructor/destructor call from '- .cxx_construct' or '- .cxx_destruct'
|
||
methods (if '-fobjc-call-cxx-cdtors' was specified). */
|
||
if (IS_AGGR_TYPE (field_type)
|
||
&& (TYPE_NEEDS_CONSTRUCTING (field_type)
|
||
|| TYPE_HAS_NONTRIVIAL_DESTRUCTOR (field_type)
|
||
|| TYPE_POLYMORPHIC_P (field_type)))
|
||
{
|
||
const char *type_name = IDENTIFIER_POINTER (OBJC_TYPE_NAME (field_type));
|
||
|
||
if (flag_objc_call_cxx_cdtors)
|
||
{
|
||
/* Since the ObjC runtime will be calling the constructors and
|
||
destructors for us, the only thing we can't handle is the lack
|
||
of a default constructor. */
|
||
if (TYPE_NEEDS_CONSTRUCTING (field_type)
|
||
&& !TYPE_HAS_DEFAULT_CONSTRUCTOR (field_type))
|
||
{
|
||
warning (0, "type %qs has no default constructor to call",
|
||
type_name);
|
||
|
||
/* If we cannot call a constructor, we should also avoid
|
||
calling the destructor, for symmetry. */
|
||
if (TYPE_HAS_NONTRIVIAL_DESTRUCTOR (field_type))
|
||
warning (0, "destructor for %qs shall not be run either",
|
||
type_name);
|
||
}
|
||
}
|
||
else
|
||
{
|
||
static bool warn_cxx_ivars = false;
|
||
|
||
if (TYPE_POLYMORPHIC_P (field_type))
|
||
{
|
||
/* Vtable pointers are Real Bad(tm), since Obj-C cannot
|
||
initialize them. */
|
||
error ("type %qs has virtual member functions", type_name);
|
||
error ("illegal aggregate type %qs specified "
|
||
"for instance variable %qs",
|
||
type_name, ivar_name);
|
||
/* Return class as is without adding this ivar. */
|
||
return class;
|
||
}
|
||
|
||
/* User-defined constructors and destructors are not known to Obj-C
|
||
and hence will not be called. This may or may not be a problem. */
|
||
if (TYPE_NEEDS_CONSTRUCTING (field_type))
|
||
warning (0, "type %qs has a user-defined constructor", type_name);
|
||
if (TYPE_HAS_NONTRIVIAL_DESTRUCTOR (field_type))
|
||
warning (0, "type %qs has a user-defined destructor", type_name);
|
||
|
||
if (!warn_cxx_ivars)
|
||
{
|
||
warning (0, "C++ constructors and destructors will not "
|
||
"be invoked for Objective-C fields");
|
||
warn_cxx_ivars = true;
|
||
}
|
||
}
|
||
}
|
||
#endif
|
||
|
||
/* Overload the public attribute, it is not used for FIELD_DECLs. */
|
||
switch (public)
|
||
{
|
||
case 0:
|
||
TREE_PUBLIC (field_decl) = 0;
|
||
TREE_PRIVATE (field_decl) = 0;
|
||
TREE_PROTECTED (field_decl) = 1;
|
||
break;
|
||
|
||
case 1:
|
||
TREE_PUBLIC (field_decl) = 1;
|
||
TREE_PRIVATE (field_decl) = 0;
|
||
TREE_PROTECTED (field_decl) = 0;
|
||
break;
|
||
|
||
case 2:
|
||
TREE_PUBLIC (field_decl) = 0;
|
||
TREE_PRIVATE (field_decl) = 1;
|
||
TREE_PROTECTED (field_decl) = 0;
|
||
break;
|
||
|
||
}
|
||
|
||
CLASS_RAW_IVARS (class) = chainon (CLASS_RAW_IVARS (class), field_decl);
|
||
|
||
return class;
|
||
}
|
||
|
||
static tree
|
||
is_ivar (tree decl_chain, tree ident)
|
||
{
|
||
for ( ; decl_chain; decl_chain = TREE_CHAIN (decl_chain))
|
||
if (DECL_NAME (decl_chain) == ident)
|
||
return decl_chain;
|
||
return NULL_TREE;
|
||
}
|
||
|
||
/* True if the ivar is private and we are not in its implementation. */
|
||
|
||
static int
|
||
is_private (tree decl)
|
||
{
|
||
return (TREE_PRIVATE (decl)
|
||
&& ! is_ivar (CLASS_IVARS (implementation_template),
|
||
DECL_NAME (decl)));
|
||
}
|
||
|
||
/* We have an instance variable reference;, check to see if it is public. */
|
||
|
||
int
|
||
objc_is_public (tree expr, tree identifier)
|
||
{
|
||
tree basetype, decl;
|
||
|
||
#ifdef OBJCPLUS
|
||
if (processing_template_decl)
|
||
return 1;
|
||
#endif
|
||
|
||
if (TREE_TYPE (expr) == error_mark_node)
|
||
return 1;
|
||
|
||
basetype = TYPE_MAIN_VARIANT (TREE_TYPE (expr));
|
||
|
||
if (basetype && TREE_CODE (basetype) == RECORD_TYPE)
|
||
{
|
||
if (TYPE_HAS_OBJC_INFO (basetype) && TYPE_OBJC_INTERFACE (basetype))
|
||
{
|
||
tree class = lookup_interface (OBJC_TYPE_NAME (basetype));
|
||
|
||
if (!class)
|
||
{
|
||
error ("cannot find interface declaration for %qs",
|
||
IDENTIFIER_POINTER (OBJC_TYPE_NAME (basetype)));
|
||
return 0;
|
||
}
|
||
|
||
if ((decl = is_ivar (get_class_ivars (class, true), identifier)))
|
||
{
|
||
if (TREE_PUBLIC (decl))
|
||
return 1;
|
||
|
||
/* Important difference between the Stepstone translator:
|
||
all instance variables should be public within the context
|
||
of the implementation. */
|
||
if (objc_implementation_context
|
||
&& ((TREE_CODE (objc_implementation_context)
|
||
== CLASS_IMPLEMENTATION_TYPE)
|
||
|| (TREE_CODE (objc_implementation_context)
|
||
== CATEGORY_IMPLEMENTATION_TYPE)))
|
||
{
|
||
tree curtype = TYPE_MAIN_VARIANT
|
||
(CLASS_STATIC_TEMPLATE
|
||
(implementation_template));
|
||
|
||
if (basetype == curtype
|
||
|| DERIVED_FROM_P (basetype, curtype))
|
||
{
|
||
int private = is_private (decl);
|
||
|
||
if (private)
|
||
error ("instance variable %qs is declared private",
|
||
IDENTIFIER_POINTER (DECL_NAME (decl)));
|
||
|
||
return !private;
|
||
}
|
||
}
|
||
|
||
/* The 2.95.2 compiler sometimes allowed C functions to access
|
||
non-@public ivars. We will let this slide for now... */
|
||
if (!objc_method_context)
|
||
{
|
||
warning (0, "instance variable %qs is %s; "
|
||
"this will be a hard error in the future",
|
||
IDENTIFIER_POINTER (identifier),
|
||
TREE_PRIVATE (decl) ? "@private" : "@protected");
|
||
return 1;
|
||
}
|
||
|
||
error ("instance variable %qs is declared %s",
|
||
IDENTIFIER_POINTER (identifier),
|
||
TREE_PRIVATE (decl) ? "private" : "protected");
|
||
return 0;
|
||
}
|
||
}
|
||
}
|
||
|
||
return 1;
|
||
}
|
||
|
||
/* Make sure all entries in CHAIN are also in LIST. */
|
||
|
||
static int
|
||
check_methods (tree chain, tree list, int mtype)
|
||
{
|
||
int first = 1;
|
||
|
||
while (chain)
|
||
{
|
||
if (!lookup_method (list, chain))
|
||
{
|
||
if (first)
|
||
{
|
||
if (TREE_CODE (objc_implementation_context)
|
||
== CLASS_IMPLEMENTATION_TYPE)
|
||
warning (0, "incomplete implementation of class %qs",
|
||
IDENTIFIER_POINTER (CLASS_NAME (objc_implementation_context)));
|
||
else if (TREE_CODE (objc_implementation_context)
|
||
== CATEGORY_IMPLEMENTATION_TYPE)
|
||
warning (0, "incomplete implementation of category %qs",
|
||
IDENTIFIER_POINTER (CLASS_SUPER_NAME (objc_implementation_context)));
|
||
first = 0;
|
||
}
|
||
|
||
warning (0, "method definition for %<%c%s%> not found",
|
||
mtype, IDENTIFIER_POINTER (METHOD_SEL_NAME (chain)));
|
||
}
|
||
|
||
chain = TREE_CHAIN (chain);
|
||
}
|
||
|
||
return first;
|
||
}
|
||
|
||
/* Check if CLASS, or its superclasses, explicitly conforms to PROTOCOL. */
|
||
|
||
static int
|
||
conforms_to_protocol (tree class, tree protocol)
|
||
{
|
||
if (TREE_CODE (protocol) == PROTOCOL_INTERFACE_TYPE)
|
||
{
|
||
tree p = CLASS_PROTOCOL_LIST (class);
|
||
while (p && TREE_VALUE (p) != protocol)
|
||
p = TREE_CHAIN (p);
|
||
|
||
if (!p)
|
||
{
|
||
tree super = (CLASS_SUPER_NAME (class)
|
||
? lookup_interface (CLASS_SUPER_NAME (class))
|
||
: NULL_TREE);
|
||
int tmp = super ? conforms_to_protocol (super, protocol) : 0;
|
||
if (!tmp)
|
||
return 0;
|
||
}
|
||
}
|
||
|
||
return 1;
|
||
}
|
||
|
||
/* Make sure all methods in CHAIN are accessible as MTYPE methods in
|
||
CONTEXT. This is one of two mechanisms to check protocol integrity. */
|
||
|
||
static int
|
||
check_methods_accessible (tree chain, tree context, int mtype)
|
||
{
|
||
int first = 1;
|
||
tree list;
|
||
tree base_context = context;
|
||
|
||
while (chain)
|
||
{
|
||
context = base_context;
|
||
while (context)
|
||
{
|
||
if (mtype == '+')
|
||
list = CLASS_CLS_METHODS (context);
|
||
else
|
||
list = CLASS_NST_METHODS (context);
|
||
|
||
if (lookup_method (list, chain))
|
||
break;
|
||
|
||
else if (TREE_CODE (context) == CLASS_IMPLEMENTATION_TYPE
|
||
|| TREE_CODE (context) == CLASS_INTERFACE_TYPE)
|
||
context = (CLASS_SUPER_NAME (context)
|
||
? lookup_interface (CLASS_SUPER_NAME (context))
|
||
: NULL_TREE);
|
||
|
||
else if (TREE_CODE (context) == CATEGORY_IMPLEMENTATION_TYPE
|
||
|| TREE_CODE (context) == CATEGORY_INTERFACE_TYPE)
|
||
context = (CLASS_NAME (context)
|
||
? lookup_interface (CLASS_NAME (context))
|
||
: NULL_TREE);
|
||
else
|
||
abort ();
|
||
}
|
||
|
||
if (context == NULL_TREE)
|
||
{
|
||
if (first)
|
||
{
|
||
if (TREE_CODE (objc_implementation_context)
|
||
== CLASS_IMPLEMENTATION_TYPE)
|
||
warning (0, "incomplete implementation of class %qs",
|
||
IDENTIFIER_POINTER
|
||
(CLASS_NAME (objc_implementation_context)));
|
||
else if (TREE_CODE (objc_implementation_context)
|
||
== CATEGORY_IMPLEMENTATION_TYPE)
|
||
warning (0, "incomplete implementation of category %qs",
|
||
IDENTIFIER_POINTER
|
||
(CLASS_SUPER_NAME (objc_implementation_context)));
|
||
first = 0;
|
||
}
|
||
warning (0, "method definition for %<%c%s%> not found",
|
||
mtype, IDENTIFIER_POINTER (METHOD_SEL_NAME (chain)));
|
||
}
|
||
|
||
chain = TREE_CHAIN (chain); /* next method... */
|
||
}
|
||
return first;
|
||
}
|
||
|
||
/* Check whether the current interface (accessible via
|
||
'objc_implementation_context') actually implements protocol P, along
|
||
with any protocols that P inherits. */
|
||
|
||
static void
|
||
check_protocol (tree p, const char *type, const char *name)
|
||
{
|
||
if (TREE_CODE (p) == PROTOCOL_INTERFACE_TYPE)
|
||
{
|
||
int f1, f2;
|
||
|
||
/* Ensure that all protocols have bodies! */
|
||
if (warn_protocol)
|
||
{
|
||
f1 = check_methods (PROTOCOL_CLS_METHODS (p),
|
||
CLASS_CLS_METHODS (objc_implementation_context),
|
||
'+');
|
||
f2 = check_methods (PROTOCOL_NST_METHODS (p),
|
||
CLASS_NST_METHODS (objc_implementation_context),
|
||
'-');
|
||
}
|
||
else
|
||
{
|
||
f1 = check_methods_accessible (PROTOCOL_CLS_METHODS (p),
|
||
objc_implementation_context,
|
||
'+');
|
||
f2 = check_methods_accessible (PROTOCOL_NST_METHODS (p),
|
||
objc_implementation_context,
|
||
'-');
|
||
}
|
||
|
||
if (!f1 || !f2)
|
||
warning (0, "%s %qs does not fully implement the %qs protocol",
|
||
type, name, IDENTIFIER_POINTER (PROTOCOL_NAME (p)));
|
||
}
|
||
|
||
/* Check protocols recursively. */
|
||
if (PROTOCOL_LIST (p))
|
||
{
|
||
tree subs = PROTOCOL_LIST (p);
|
||
tree super_class =
|
||
lookup_interface (CLASS_SUPER_NAME (implementation_template));
|
||
|
||
while (subs)
|
||
{
|
||
tree sub = TREE_VALUE (subs);
|
||
|
||
/* If the superclass does not conform to the protocols
|
||
inherited by P, then we must! */
|
||
if (!super_class || !conforms_to_protocol (super_class, sub))
|
||
check_protocol (sub, type, name);
|
||
subs = TREE_CHAIN (subs);
|
||
}
|
||
}
|
||
}
|
||
|
||
/* Check whether the current interface (accessible via
|
||
'objc_implementation_context') actually implements the protocols listed
|
||
in PROTO_LIST. */
|
||
|
||
static void
|
||
check_protocols (tree proto_list, const char *type, const char *name)
|
||
{
|
||
for ( ; proto_list; proto_list = TREE_CHAIN (proto_list))
|
||
{
|
||
tree p = TREE_VALUE (proto_list);
|
||
|
||
check_protocol (p, type, name);
|
||
}
|
||
}
|
||
|
||
/* Make sure that the class CLASS_NAME is defined
|
||
CODE says which kind of thing CLASS_NAME ought to be.
|
||
It can be CLASS_INTERFACE_TYPE, CLASS_IMPLEMENTATION_TYPE,
|
||
CATEGORY_INTERFACE_TYPE, or CATEGORY_IMPLEMENTATION_TYPE. */
|
||
|
||
static tree
|
||
start_class (enum tree_code code, tree class_name, tree super_name,
|
||
tree protocol_list)
|
||
{
|
||
tree class, decl;
|
||
|
||
#ifdef OBJCPLUS
|
||
if (current_namespace != global_namespace) {
|
||
error ("Objective-C declarations may only appear in global scope");
|
||
}
|
||
#endif /* OBJCPLUS */
|
||
|
||
if (objc_implementation_context)
|
||
{
|
||
warning (0, "%<@end%> missing in implementation context");
|
||
finish_class (objc_implementation_context);
|
||
objc_ivar_chain = NULL_TREE;
|
||
objc_implementation_context = NULL_TREE;
|
||
}
|
||
|
||
class = make_node (code);
|
||
TYPE_LANG_SLOT_1 (class) = make_tree_vec (CLASS_LANG_SLOT_ELTS);
|
||
|
||
/* Check for existence of the super class, if one was specified. Note
|
||
that we must have seen an @interface, not just a @class. If we
|
||
are looking at a @compatibility_alias, traverse it first. */
|
||
if ((code == CLASS_INTERFACE_TYPE || code == CLASS_IMPLEMENTATION_TYPE)
|
||
&& super_name)
|
||
{
|
||
tree super = objc_is_class_name (super_name);
|
||
|
||
if (!super || !lookup_interface (super))
|
||
{
|
||
error ("cannot find interface declaration for %qs, superclass of %qs",
|
||
IDENTIFIER_POINTER (super ? super : super_name),
|
||
IDENTIFIER_POINTER (class_name));
|
||
super_name = NULL_TREE;
|
||
}
|
||
else
|
||
super_name = super;
|
||
}
|
||
|
||
CLASS_NAME (class) = class_name;
|
||
CLASS_SUPER_NAME (class) = super_name;
|
||
CLASS_CLS_METHODS (class) = NULL_TREE;
|
||
|
||
if (! objc_is_class_name (class_name)
|
||
&& (decl = lookup_name (class_name)))
|
||
{
|
||
error ("%qs redeclared as different kind of symbol",
|
||
IDENTIFIER_POINTER (class_name));
|
||
error ("previous declaration of %q+D",
|
||
decl);
|
||
}
|
||
|
||
if (code == CLASS_IMPLEMENTATION_TYPE)
|
||
{
|
||
{
|
||
tree chain;
|
||
|
||
for (chain = implemented_classes; chain; chain = TREE_CHAIN (chain))
|
||
if (TREE_VALUE (chain) == class_name)
|
||
{
|
||
error ("reimplementation of class %qs",
|
||
IDENTIFIER_POINTER (class_name));
|
||
return error_mark_node;
|
||
}
|
||
implemented_classes = tree_cons (NULL_TREE, class_name,
|
||
implemented_classes);
|
||
}
|
||
|
||
/* Reset for multiple classes per file. */
|
||
method_slot = 0;
|
||
|
||
objc_implementation_context = class;
|
||
|
||
/* Lookup the interface for this implementation. */
|
||
|
||
if (!(implementation_template = lookup_interface (class_name)))
|
||
{
|
||
warning (0, "cannot find interface declaration for %qs",
|
||
IDENTIFIER_POINTER (class_name));
|
||
add_class (implementation_template = objc_implementation_context,
|
||
class_name);
|
||
}
|
||
|
||
/* If a super class has been specified in the implementation,
|
||
insure it conforms to the one specified in the interface. */
|
||
|
||
if (super_name
|
||
&& (super_name != CLASS_SUPER_NAME (implementation_template)))
|
||
{
|
||
tree previous_name = CLASS_SUPER_NAME (implementation_template);
|
||
const char *const name =
|
||
previous_name ? IDENTIFIER_POINTER (previous_name) : "";
|
||
error ("conflicting super class name %qs",
|
||
IDENTIFIER_POINTER (super_name));
|
||
error ("previous declaration of %qs", name);
|
||
}
|
||
|
||
else if (! super_name)
|
||
{
|
||
CLASS_SUPER_NAME (objc_implementation_context)
|
||
= CLASS_SUPER_NAME (implementation_template);
|
||
}
|
||
}
|
||
|
||
else if (code == CLASS_INTERFACE_TYPE)
|
||
{
|
||
if (lookup_interface (class_name))
|
||
#ifdef OBJCPLUS
|
||
error ("duplicate interface declaration for class %qs",
|
||
#else
|
||
warning (0, "duplicate interface declaration for class %qs",
|
||
#endif
|
||
IDENTIFIER_POINTER (class_name));
|
||
else
|
||
add_class (class, class_name);
|
||
|
||
if (protocol_list)
|
||
CLASS_PROTOCOL_LIST (class)
|
||
= lookup_and_install_protocols (protocol_list);
|
||
}
|
||
|
||
else if (code == CATEGORY_INTERFACE_TYPE)
|
||
{
|
||
tree class_category_is_assoc_with;
|
||
|
||
/* For a category, class_name is really the name of the class that
|
||
the following set of methods will be associated with. We must
|
||
find the interface so that can derive the objects template. */
|
||
|
||
if (!(class_category_is_assoc_with = lookup_interface (class_name)))
|
||
{
|
||
error ("cannot find interface declaration for %qs",
|
||
IDENTIFIER_POINTER (class_name));
|
||
exit (FATAL_EXIT_CODE);
|
||
}
|
||
else
|
||
add_category (class_category_is_assoc_with, class);
|
||
|
||
if (protocol_list)
|
||
CLASS_PROTOCOL_LIST (class)
|
||
= lookup_and_install_protocols (protocol_list);
|
||
}
|
||
|
||
else if (code == CATEGORY_IMPLEMENTATION_TYPE)
|
||
{
|
||
/* Reset for multiple classes per file. */
|
||
method_slot = 0;
|
||
|
||
objc_implementation_context = class;
|
||
|
||
/* For a category, class_name is really the name of the class that
|
||
the following set of methods will be associated with. We must
|
||
find the interface so that can derive the objects template. */
|
||
|
||
if (!(implementation_template = lookup_interface (class_name)))
|
||
{
|
||
error ("cannot find interface declaration for %qs",
|
||
IDENTIFIER_POINTER (class_name));
|
||
exit (FATAL_EXIT_CODE);
|
||
}
|
||
}
|
||
return class;
|
||
}
|
||
|
||
static tree
|
||
continue_class (tree class)
|
||
{
|
||
if (TREE_CODE (class) == CLASS_IMPLEMENTATION_TYPE
|
||
|| TREE_CODE (class) == CATEGORY_IMPLEMENTATION_TYPE)
|
||
{
|
||
struct imp_entry *imp_entry;
|
||
|
||
/* Check consistency of the instance variables. */
|
||
|
||
if (CLASS_RAW_IVARS (class))
|
||
check_ivars (implementation_template, class);
|
||
|
||
/* code generation */
|
||
|
||
#ifdef OBJCPLUS
|
||
push_lang_context (lang_name_c);
|
||
#endif
|
||
|
||
build_private_template (implementation_template);
|
||
uprivate_record = CLASS_STATIC_TEMPLATE (implementation_template);
|
||
objc_instance_type = build_pointer_type (uprivate_record);
|
||
|
||
imp_entry = (struct imp_entry *) ggc_alloc (sizeof (struct imp_entry));
|
||
|
||
imp_entry->next = imp_list;
|
||
imp_entry->imp_context = class;
|
||
imp_entry->imp_template = implementation_template;
|
||
|
||
synth_forward_declarations ();
|
||
imp_entry->class_decl = UOBJC_CLASS_decl;
|
||
imp_entry->meta_decl = UOBJC_METACLASS_decl;
|
||
imp_entry->has_cxx_cdtors = 0;
|
||
|
||
/* Append to front and increment count. */
|
||
imp_list = imp_entry;
|
||
if (TREE_CODE (class) == CLASS_IMPLEMENTATION_TYPE)
|
||
imp_count++;
|
||
else
|
||
cat_count++;
|
||
|
||
#ifdef OBJCPLUS
|
||
pop_lang_context ();
|
||
#endif /* OBJCPLUS */
|
||
|
||
return get_class_ivars (implementation_template, true);
|
||
}
|
||
|
||
else if (TREE_CODE (class) == CLASS_INTERFACE_TYPE)
|
||
{
|
||
#ifdef OBJCPLUS
|
||
push_lang_context (lang_name_c);
|
||
#endif /* OBJCPLUS */
|
||
|
||
build_private_template (class);
|
||
|
||
#ifdef OBJCPLUS
|
||
pop_lang_context ();
|
||
#endif /* OBJCPLUS */
|
||
|
||
return NULL_TREE;
|
||
}
|
||
|
||
else
|
||
return error_mark_node;
|
||
}
|
||
|
||
/* This is called once we see the "@end" in an interface/implementation. */
|
||
|
||
static void
|
||
finish_class (tree class)
|
||
{
|
||
if (TREE_CODE (class) == CLASS_IMPLEMENTATION_TYPE)
|
||
{
|
||
/* All code generation is done in finish_objc. */
|
||
|
||
if (implementation_template != objc_implementation_context)
|
||
{
|
||
/* Ensure that all method listed in the interface contain bodies. */
|
||
check_methods (CLASS_CLS_METHODS (implementation_template),
|
||
CLASS_CLS_METHODS (objc_implementation_context), '+');
|
||
check_methods (CLASS_NST_METHODS (implementation_template),
|
||
CLASS_NST_METHODS (objc_implementation_context), '-');
|
||
|
||
if (CLASS_PROTOCOL_LIST (implementation_template))
|
||
check_protocols (CLASS_PROTOCOL_LIST (implementation_template),
|
||
"class",
|
||
IDENTIFIER_POINTER (CLASS_NAME (objc_implementation_context)));
|
||
}
|
||
}
|
||
|
||
else if (TREE_CODE (class) == CATEGORY_IMPLEMENTATION_TYPE)
|
||
{
|
||
tree category = lookup_category (implementation_template, CLASS_SUPER_NAME (class));
|
||
|
||
if (category)
|
||
{
|
||
/* Ensure all method listed in the interface contain bodies. */
|
||
check_methods (CLASS_CLS_METHODS (category),
|
||
CLASS_CLS_METHODS (objc_implementation_context), '+');
|
||
check_methods (CLASS_NST_METHODS (category),
|
||
CLASS_NST_METHODS (objc_implementation_context), '-');
|
||
|
||
if (CLASS_PROTOCOL_LIST (category))
|
||
check_protocols (CLASS_PROTOCOL_LIST (category),
|
||
"category",
|
||
IDENTIFIER_POINTER (CLASS_SUPER_NAME (objc_implementation_context)));
|
||
}
|
||
}
|
||
}
|
||
|
||
static tree
|
||
add_protocol (tree protocol)
|
||
{
|
||
/* Put protocol on list in reverse order. */
|
||
TREE_CHAIN (protocol) = protocol_chain;
|
||
protocol_chain = protocol;
|
||
return protocol_chain;
|
||
}
|
||
|
||
static tree
|
||
lookup_protocol (tree ident)
|
||
{
|
||
tree chain;
|
||
|
||
for (chain = protocol_chain; chain; chain = TREE_CHAIN (chain))
|
||
if (ident == PROTOCOL_NAME (chain))
|
||
return chain;
|
||
|
||
return NULL_TREE;
|
||
}
|
||
|
||
/* This function forward declares the protocols named by NAMES. If
|
||
they are already declared or defined, the function has no effect. */
|
||
|
||
void
|
||
objc_declare_protocols (tree names)
|
||
{
|
||
tree list;
|
||
|
||
#ifdef OBJCPLUS
|
||
if (current_namespace != global_namespace) {
|
||
error ("Objective-C declarations may only appear in global scope");
|
||
}
|
||
#endif /* OBJCPLUS */
|
||
|
||
for (list = names; list; list = TREE_CHAIN (list))
|
||
{
|
||
tree name = TREE_VALUE (list);
|
||
|
||
if (lookup_protocol (name) == NULL_TREE)
|
||
{
|
||
tree protocol = make_node (PROTOCOL_INTERFACE_TYPE);
|
||
|
||
TYPE_LANG_SLOT_1 (protocol)
|
||
= make_tree_vec (PROTOCOL_LANG_SLOT_ELTS);
|
||
PROTOCOL_NAME (protocol) = name;
|
||
PROTOCOL_LIST (protocol) = NULL_TREE;
|
||
add_protocol (protocol);
|
||
PROTOCOL_DEFINED (protocol) = 0;
|
||
PROTOCOL_FORWARD_DECL (protocol) = NULL_TREE;
|
||
}
|
||
}
|
||
}
|
||
|
||
static tree
|
||
start_protocol (enum tree_code code, tree name, tree list)
|
||
{
|
||
tree protocol;
|
||
|
||
#ifdef OBJCPLUS
|
||
if (current_namespace != global_namespace) {
|
||
error ("Objective-C declarations may only appear in global scope");
|
||
}
|
||
#endif /* OBJCPLUS */
|
||
|
||
protocol = lookup_protocol (name);
|
||
|
||
if (!protocol)
|
||
{
|
||
protocol = make_node (code);
|
||
TYPE_LANG_SLOT_1 (protocol) = make_tree_vec (PROTOCOL_LANG_SLOT_ELTS);
|
||
|
||
PROTOCOL_NAME (protocol) = name;
|
||
PROTOCOL_LIST (protocol) = lookup_and_install_protocols (list);
|
||
add_protocol (protocol);
|
||
PROTOCOL_DEFINED (protocol) = 1;
|
||
PROTOCOL_FORWARD_DECL (protocol) = NULL_TREE;
|
||
|
||
check_protocol_recursively (protocol, list);
|
||
}
|
||
else if (! PROTOCOL_DEFINED (protocol))
|
||
{
|
||
PROTOCOL_DEFINED (protocol) = 1;
|
||
PROTOCOL_LIST (protocol) = lookup_and_install_protocols (list);
|
||
|
||
check_protocol_recursively (protocol, list);
|
||
}
|
||
else
|
||
{
|
||
warning (0, "duplicate declaration for protocol %qs",
|
||
IDENTIFIER_POINTER (name));
|
||
}
|
||
return protocol;
|
||
}
|
||
|
||
|
||
/* "Encode" a data type into a string, which grows in util_obstack.
|
||
??? What is the FORMAT? Someone please document this! */
|
||
|
||
static void
|
||
encode_type_qualifiers (tree declspecs)
|
||
{
|
||
tree spec;
|
||
|
||
for (spec = declspecs; spec; spec = TREE_CHAIN (spec))
|
||
{
|
||
if (ridpointers[(int) RID_IN] == TREE_VALUE (spec))
|
||
obstack_1grow (&util_obstack, 'n');
|
||
else if (ridpointers[(int) RID_INOUT] == TREE_VALUE (spec))
|
||
obstack_1grow (&util_obstack, 'N');
|
||
else if (ridpointers[(int) RID_OUT] == TREE_VALUE (spec))
|
||
obstack_1grow (&util_obstack, 'o');
|
||
else if (ridpointers[(int) RID_BYCOPY] == TREE_VALUE (spec))
|
||
obstack_1grow (&util_obstack, 'O');
|
||
else if (ridpointers[(int) RID_BYREF] == TREE_VALUE (spec))
|
||
obstack_1grow (&util_obstack, 'R');
|
||
else if (ridpointers[(int) RID_ONEWAY] == TREE_VALUE (spec))
|
||
obstack_1grow (&util_obstack, 'V');
|
||
}
|
||
}
|
||
|
||
/* Encode a pointer type. */
|
||
|
||
static void
|
||
encode_pointer (tree type, int curtype, int format)
|
||
{
|
||
tree pointer_to = TREE_TYPE (type);
|
||
|
||
if (TREE_CODE (pointer_to) == RECORD_TYPE)
|
||
{
|
||
if (OBJC_TYPE_NAME (pointer_to)
|
||
&& TREE_CODE (OBJC_TYPE_NAME (pointer_to)) == IDENTIFIER_NODE)
|
||
{
|
||
const char *name = IDENTIFIER_POINTER (OBJC_TYPE_NAME (pointer_to));
|
||
|
||
if (strcmp (name, TAG_OBJECT) == 0) /* '@' */
|
||
{
|
||
obstack_1grow (&util_obstack, '@');
|
||
return;
|
||
}
|
||
else if (TYPE_HAS_OBJC_INFO (pointer_to)
|
||
&& TYPE_OBJC_INTERFACE (pointer_to))
|
||
{
|
||
if (generating_instance_variables)
|
||
{
|
||
obstack_1grow (&util_obstack, '@');
|
||
obstack_1grow (&util_obstack, '"');
|
||
obstack_grow (&util_obstack, name, strlen (name));
|
||
obstack_1grow (&util_obstack, '"');
|
||
return;
|
||
}
|
||
else
|
||
{
|
||
obstack_1grow (&util_obstack, '@');
|
||
return;
|
||
}
|
||
}
|
||
else if (strcmp (name, TAG_CLASS) == 0) /* '#' */
|
||
{
|
||
obstack_1grow (&util_obstack, '#');
|
||
return;
|
||
}
|
||
else if (strcmp (name, TAG_SELECTOR) == 0) /* ':' */
|
||
{
|
||
obstack_1grow (&util_obstack, ':');
|
||
return;
|
||
}
|
||
}
|
||
}
|
||
else if (TREE_CODE (pointer_to) == INTEGER_TYPE
|
||
&& TYPE_MODE (pointer_to) == QImode)
|
||
{
|
||
tree pname = TREE_CODE (OBJC_TYPE_NAME (pointer_to)) == IDENTIFIER_NODE
|
||
? OBJC_TYPE_NAME (pointer_to)
|
||
: DECL_NAME (OBJC_TYPE_NAME (pointer_to));
|
||
|
||
if (!flag_next_runtime || strcmp (IDENTIFIER_POINTER (pname), "BOOL"))
|
||
{
|
||
/* It appears that "r*" means "const char *" rather than
|
||
"char *const". */
|
||
if (TYPE_READONLY (pointer_to))
|
||
obstack_1grow (&util_obstack, 'r');
|
||
|
||
obstack_1grow (&util_obstack, '*');
|
||
return;
|
||
}
|
||
}
|
||
|
||
/* We have a type that does not get special treatment. */
|
||
|
||
/* NeXT extension */
|
||
obstack_1grow (&util_obstack, '^');
|
||
encode_type (pointer_to, curtype, format);
|
||
}
|
||
|
||
static void
|
||
encode_array (tree type, int curtype, int format)
|
||
{
|
||
tree an_int_cst = TYPE_SIZE (type);
|
||
tree array_of = TREE_TYPE (type);
|
||
char buffer[40];
|
||
|
||
/* An incomplete array is treated like a pointer. */
|
||
if (an_int_cst == NULL)
|
||
{
|
||
encode_pointer (type, curtype, format);
|
||
return;
|
||
}
|
||
|
||
if (TREE_INT_CST_LOW (TYPE_SIZE (array_of)) == 0)
|
||
sprintf (buffer, "[" HOST_WIDE_INT_PRINT_DEC, (HOST_WIDE_INT)0);
|
||
else
|
||
sprintf (buffer, "[" HOST_WIDE_INT_PRINT_DEC,
|
||
TREE_INT_CST_LOW (an_int_cst)
|
||
/ TREE_INT_CST_LOW (TYPE_SIZE (array_of)));
|
||
|
||
obstack_grow (&util_obstack, buffer, strlen (buffer));
|
||
encode_type (array_of, curtype, format);
|
||
obstack_1grow (&util_obstack, ']');
|
||
return;
|
||
}
|
||
|
||
static void
|
||
encode_aggregate_fields (tree type, int pointed_to, int curtype, int format)
|
||
{
|
||
tree field = TYPE_FIELDS (type);
|
||
|
||
for (; field; field = TREE_CHAIN (field))
|
||
{
|
||
#ifdef OBJCPLUS
|
||
/* C++ static members, and things that are not field at all,
|
||
should not appear in the encoding. */
|
||
if (TREE_CODE (field) != FIELD_DECL || TREE_STATIC (field))
|
||
continue;
|
||
#endif
|
||
|
||
/* Recursively encode fields of embedded base classes. */
|
||
if (DECL_ARTIFICIAL (field) && !DECL_NAME (field)
|
||
&& TREE_CODE (TREE_TYPE (field)) == RECORD_TYPE)
|
||
{
|
||
encode_aggregate_fields (TREE_TYPE (field),
|
||
pointed_to, curtype, format);
|
||
continue;
|
||
}
|
||
|
||
if (generating_instance_variables && !pointed_to)
|
||
{
|
||
tree fname = DECL_NAME (field);
|
||
|
||
obstack_1grow (&util_obstack, '"');
|
||
|
||
if (fname && TREE_CODE (fname) == IDENTIFIER_NODE)
|
||
obstack_grow (&util_obstack,
|
||
IDENTIFIER_POINTER (fname),
|
||
strlen (IDENTIFIER_POINTER (fname)));
|
||
|
||
obstack_1grow (&util_obstack, '"');
|
||
}
|
||
|
||
encode_field_decl (field, curtype, format);
|
||
}
|
||
}
|
||
|
||
static void
|
||
encode_aggregate_within (tree type, int curtype, int format, int left,
|
||
int right)
|
||
{
|
||
tree name;
|
||
/* NB: aggregates that are pointed to have slightly different encoding
|
||
rules in that you never encode the names of instance variables. */
|
||
int ob_size = obstack_object_size (&util_obstack);
|
||
char c1 = ob_size > 1 ? *(obstack_next_free (&util_obstack) - 2) : 0;
|
||
char c0 = ob_size > 0 ? *(obstack_next_free (&util_obstack) - 1) : 0;
|
||
int pointed_to = (c0 == '^' || (c1 == '^' && c0 == 'r'));
|
||
int inline_contents
|
||
= ((format == OBJC_ENCODE_INLINE_DEFS || generating_instance_variables)
|
||
&& (!pointed_to || ob_size - curtype == (c1 == 'r' ? 2 : 1)));
|
||
|
||
/* Traverse struct aliases; it is important to get the
|
||
original struct and its tag name (if any). */
|
||
type = TYPE_MAIN_VARIANT (type);
|
||
name = OBJC_TYPE_NAME (type);
|
||
/* Open parenth/bracket. */
|
||
obstack_1grow (&util_obstack, left);
|
||
|
||
/* Encode the struct/union tag name, or '?' if a tag was
|
||
not provided. Typedef aliases do not qualify. */
|
||
if (name && TREE_CODE (name) == IDENTIFIER_NODE
|
||
#ifdef OBJCPLUS
|
||
/* Did this struct have a tag? */
|
||
&& !TYPE_WAS_ANONYMOUS (type)
|
||
#endif
|
||
)
|
||
obstack_grow (&util_obstack,
|
||
IDENTIFIER_POINTER (name),
|
||
strlen (IDENTIFIER_POINTER (name)));
|
||
else
|
||
obstack_1grow (&util_obstack, '?');
|
||
|
||
/* Encode the types (and possibly names) of the inner fields,
|
||
if required. */
|
||
if (inline_contents)
|
||
{
|
||
obstack_1grow (&util_obstack, '=');
|
||
encode_aggregate_fields (type, pointed_to, curtype, format);
|
||
}
|
||
/* Close parenth/bracket. */
|
||
obstack_1grow (&util_obstack, right);
|
||
}
|
||
|
||
static void
|
||
encode_aggregate (tree type, int curtype, int format)
|
||
{
|
||
enum tree_code code = TREE_CODE (type);
|
||
|
||
switch (code)
|
||
{
|
||
case RECORD_TYPE:
|
||
{
|
||
encode_aggregate_within (type, curtype, format, '{', '}');
|
||
break;
|
||
}
|
||
case UNION_TYPE:
|
||
{
|
||
encode_aggregate_within (type, curtype, format, '(', ')');
|
||
break;
|
||
}
|
||
|
||
case ENUMERAL_TYPE:
|
||
obstack_1grow (&util_obstack, 'i');
|
||
break;
|
||
|
||
default:
|
||
break;
|
||
}
|
||
}
|
||
|
||
/* Encode a bitfield NeXT-style (i.e., without a bit offset or the underlying
|
||
field type. */
|
||
|
||
static void
|
||
encode_next_bitfield (int width)
|
||
{
|
||
char buffer[40];
|
||
sprintf (buffer, "b%d", width);
|
||
obstack_grow (&util_obstack, buffer, strlen (buffer));
|
||
}
|
||
|
||
/* FORMAT will be OBJC_ENCODE_INLINE_DEFS or OBJC_ENCODE_DONT_INLINE_DEFS. */
|
||
static void
|
||
encode_type (tree type, int curtype, int format)
|
||
{
|
||
enum tree_code code = TREE_CODE (type);
|
||
char c;
|
||
|
||
if (TYPE_READONLY (type))
|
||
obstack_1grow (&util_obstack, 'r');
|
||
|
||
if (code == INTEGER_TYPE)
|
||
{
|
||
switch (GET_MODE_BITSIZE (TYPE_MODE (type)))
|
||
{
|
||
case 8: c = TYPE_UNSIGNED (type) ? 'C' : 'c'; break;
|
||
case 16: c = TYPE_UNSIGNED (type) ? 'S' : 's'; break;
|
||
case 32:
|
||
if (type == long_unsigned_type_node
|
||
|| type == long_integer_type_node)
|
||
c = TYPE_UNSIGNED (type) ? 'L' : 'l';
|
||
else
|
||
c = TYPE_UNSIGNED (type) ? 'I' : 'i';
|
||
break;
|
||
case 64: c = TYPE_UNSIGNED (type) ? 'Q' : 'q'; break;
|
||
default: abort ();
|
||
}
|
||
obstack_1grow (&util_obstack, c);
|
||
}
|
||
|
||
else if (code == REAL_TYPE)
|
||
{
|
||
/* Floating point types. */
|
||
switch (GET_MODE_BITSIZE (TYPE_MODE (type)))
|
||
{
|
||
case 32: c = 'f'; break;
|
||
case 64:
|
||
case 96:
|
||
case 128: c = 'd'; break;
|
||
default: abort ();
|
||
}
|
||
obstack_1grow (&util_obstack, c);
|
||
}
|
||
|
||
else if (code == VOID_TYPE)
|
||
obstack_1grow (&util_obstack, 'v');
|
||
|
||
else if (code == BOOLEAN_TYPE)
|
||
obstack_1grow (&util_obstack, 'B');
|
||
|
||
else if (code == ARRAY_TYPE)
|
||
encode_array (type, curtype, format);
|
||
|
||
else if (code == POINTER_TYPE)
|
||
encode_pointer (type, curtype, format);
|
||
|
||
else if (code == RECORD_TYPE || code == UNION_TYPE || code == ENUMERAL_TYPE)
|
||
encode_aggregate (type, curtype, format);
|
||
|
||
else if (code == FUNCTION_TYPE) /* '?' */
|
||
obstack_1grow (&util_obstack, '?');
|
||
|
||
else if (code == COMPLEX_TYPE)
|
||
{
|
||
obstack_1grow (&util_obstack, 'j');
|
||
encode_type (TREE_TYPE (type), curtype, format);
|
||
}
|
||
}
|
||
|
||
static void
|
||
encode_gnu_bitfield (int position, tree type, int size)
|
||
{
|
||
enum tree_code code = TREE_CODE (type);
|
||
char buffer[40];
|
||
char charType = '?';
|
||
|
||
if (code == INTEGER_TYPE)
|
||
{
|
||
if (integer_zerop (TYPE_MIN_VALUE (type)))
|
||
{
|
||
/* Unsigned integer types. */
|
||
|
||
if (TYPE_MODE (type) == QImode)
|
||
charType = 'C';
|
||
else if (TYPE_MODE (type) == HImode)
|
||
charType = 'S';
|
||
else if (TYPE_MODE (type) == SImode)
|
||
{
|
||
if (type == long_unsigned_type_node)
|
||
charType = 'L';
|
||
else
|
||
charType = 'I';
|
||
}
|
||
else if (TYPE_MODE (type) == DImode)
|
||
charType = 'Q';
|
||
}
|
||
|
||
else
|
||
/* Signed integer types. */
|
||
{
|
||
if (TYPE_MODE (type) == QImode)
|
||
charType = 'c';
|
||
else if (TYPE_MODE (type) == HImode)
|
||
charType = 's';
|
||
else if (TYPE_MODE (type) == SImode)
|
||
{
|
||
if (type == long_integer_type_node)
|
||
charType = 'l';
|
||
else
|
||
charType = 'i';
|
||
}
|
||
|
||
else if (TYPE_MODE (type) == DImode)
|
||
charType = 'q';
|
||
}
|
||
}
|
||
else if (code == ENUMERAL_TYPE)
|
||
charType = 'i';
|
||
else
|
||
abort ();
|
||
|
||
sprintf (buffer, "b%d%c%d", position, charType, size);
|
||
obstack_grow (&util_obstack, buffer, strlen (buffer));
|
||
}
|
||
|
||
static void
|
||
encode_field_decl (tree field_decl, int curtype, int format)
|
||
{
|
||
tree type;
|
||
|
||
#ifdef OBJCPLUS
|
||
/* C++ static members, and things that are not fields at all,
|
||
should not appear in the encoding. */
|
||
if (TREE_CODE (field_decl) != FIELD_DECL || TREE_STATIC (field_decl))
|
||
return;
|
||
#endif
|
||
|
||
type = TREE_TYPE (field_decl);
|
||
|
||
/* Generate the bitfield typing information, if needed. Note the difference
|
||
between GNU and NeXT runtimes. */
|
||
if (DECL_BIT_FIELD_TYPE (field_decl))
|
||
{
|
||
int size = tree_low_cst (DECL_SIZE (field_decl), 1);
|
||
|
||
if (flag_next_runtime)
|
||
encode_next_bitfield (size);
|
||
else
|
||
encode_gnu_bitfield (int_bit_position (field_decl),
|
||
DECL_BIT_FIELD_TYPE (field_decl), size);
|
||
}
|
||
else
|
||
encode_type (TREE_TYPE (field_decl), curtype, format);
|
||
}
|
||
|
||
static GTY(()) tree objc_parmlist = NULL_TREE;
|
||
|
||
/* Append PARM to a list of formal parameters of a method, making a necessary
|
||
array-to-pointer adjustment along the way. */
|
||
|
||
static void
|
||
objc_push_parm (tree parm)
|
||
{
|
||
bool relayout_needed = false;
|
||
/* Decay arrays and functions into pointers. */
|
||
if (TREE_CODE (TREE_TYPE (parm)) == ARRAY_TYPE)
|
||
{
|
||
TREE_TYPE (parm) = build_pointer_type (TREE_TYPE (TREE_TYPE (parm)));
|
||
relayout_needed = true;
|
||
}
|
||
else if (TREE_CODE (TREE_TYPE (parm)) == FUNCTION_TYPE)
|
||
{
|
||
TREE_TYPE (parm) = build_pointer_type (TREE_TYPE (parm));
|
||
relayout_needed = true;
|
||
}
|
||
|
||
if (relayout_needed)
|
||
relayout_decl (parm);
|
||
|
||
|
||
DECL_ARG_TYPE (parm)
|
||
= lang_hooks.types.type_promotes_to (TREE_TYPE (parm));
|
||
|
||
/* Record constancy and volatility. */
|
||
c_apply_type_quals_to_decl
|
||
((TYPE_READONLY (TREE_TYPE (parm)) ? TYPE_QUAL_CONST : 0)
|
||
| (TYPE_RESTRICT (TREE_TYPE (parm)) ? TYPE_QUAL_RESTRICT : 0)
|
||
| (TYPE_VOLATILE (TREE_TYPE (parm)) ? TYPE_QUAL_VOLATILE : 0), parm);
|
||
|
||
objc_parmlist = chainon (objc_parmlist, parm);
|
||
}
|
||
|
||
/* Retrieve the formal parameter list constructed via preceding calls to
|
||
objc_push_parm(). */
|
||
|
||
#ifdef OBJCPLUS
|
||
static tree
|
||
objc_get_parm_info (int have_ellipsis ATTRIBUTE_UNUSED)
|
||
#else
|
||
static struct c_arg_info *
|
||
objc_get_parm_info (int have_ellipsis)
|
||
#endif
|
||
{
|
||
#ifdef OBJCPLUS
|
||
tree parm_info = objc_parmlist;
|
||
objc_parmlist = NULL_TREE;
|
||
|
||
return parm_info;
|
||
#else
|
||
tree parm_info = objc_parmlist;
|
||
struct c_arg_info *arg_info;
|
||
/* The C front-end requires an elaborate song and dance at
|
||
this point. */
|
||
push_scope ();
|
||
declare_parm_level ();
|
||
while (parm_info)
|
||
{
|
||
tree next = TREE_CHAIN (parm_info);
|
||
|
||
TREE_CHAIN (parm_info) = NULL_TREE;
|
||
parm_info = pushdecl (parm_info);
|
||
finish_decl (parm_info, NULL_TREE, NULL_TREE);
|
||
parm_info = next;
|
||
}
|
||
arg_info = get_parm_info (have_ellipsis);
|
||
pop_scope ();
|
||
objc_parmlist = NULL_TREE;
|
||
return arg_info;
|
||
#endif
|
||
}
|
||
|
||
/* Synthesize the formal parameters 'id self' and 'SEL _cmd' needed for ObjC
|
||
method definitions. In the case of instance methods, we can be more
|
||
specific as to the type of 'self'. */
|
||
|
||
static void
|
||
synth_self_and_ucmd_args (void)
|
||
{
|
||
tree self_type;
|
||
|
||
if (objc_method_context
|
||
&& TREE_CODE (objc_method_context) == INSTANCE_METHOD_DECL)
|
||
self_type = objc_instance_type;
|
||
else
|
||
/* Really a `struct objc_class *'. However, we allow people to
|
||
assign to self, which changes its type midstream. */
|
||
self_type = objc_object_type;
|
||
|
||
/* id self; */
|
||
objc_push_parm (build_decl (PARM_DECL, self_id, self_type));
|
||
|
||
/* SEL _cmd; */
|
||
objc_push_parm (build_decl (PARM_DECL, ucmd_id, objc_selector_type));
|
||
}
|
||
|
||
/* Transform an Objective-C method definition into a static C function
|
||
definition, synthesizing the first two arguments, "self" and "_cmd",
|
||
in the process. */
|
||
|
||
static void
|
||
start_method_def (tree method)
|
||
{
|
||
tree parmlist;
|
||
#ifdef OBJCPLUS
|
||
tree parm_info;
|
||
#else
|
||
struct c_arg_info *parm_info;
|
||
#endif
|
||
int have_ellipsis = 0;
|
||
|
||
/* If we are defining a "dealloc" method in a non-root class, we
|
||
will need to check if a [super dealloc] is missing, and warn if
|
||
it is. */
|
||
if(CLASS_SUPER_NAME (objc_implementation_context)
|
||
&& !strcmp ("dealloc", IDENTIFIER_POINTER (METHOD_SEL_NAME (method))))
|
||
should_call_super_dealloc = 1;
|
||
else
|
||
should_call_super_dealloc = 0;
|
||
|
||
/* Required to implement _msgSuper. */
|
||
objc_method_context = method;
|
||
UOBJC_SUPER_decl = NULL_TREE;
|
||
|
||
/* Generate prototype declarations for arguments..."new-style". */
|
||
synth_self_and_ucmd_args ();
|
||
|
||
/* Generate argument declarations if a keyword_decl. */
|
||
parmlist = METHOD_SEL_ARGS (method);
|
||
while (parmlist)
|
||
{
|
||
tree type = TREE_VALUE (TREE_TYPE (parmlist)), parm;
|
||
|
||
parm = build_decl (PARM_DECL, KEYWORD_ARG_NAME (parmlist), type);
|
||
objc_push_parm (parm);
|
||
parmlist = TREE_CHAIN (parmlist);
|
||
}
|
||
|
||
if (METHOD_ADD_ARGS (method))
|
||
{
|
||
tree akey;
|
||
|
||
for (akey = TREE_CHAIN (METHOD_ADD_ARGS (method));
|
||
akey; akey = TREE_CHAIN (akey))
|
||
{
|
||
objc_push_parm (TREE_VALUE (akey));
|
||
}
|
||
|
||
if (METHOD_ADD_ARGS_ELLIPSIS_P (method))
|
||
have_ellipsis = 1;
|
||
}
|
||
|
||
parm_info = objc_get_parm_info (have_ellipsis);
|
||
|
||
really_start_method (objc_method_context, parm_info);
|
||
}
|
||
|
||
static void
|
||
warn_with_method (const char *message, int mtype, tree method)
|
||
{
|
||
/* Add a readable method name to the warning. */
|
||
warning (0, "%J%s %<%c%s%>", method,
|
||
message, mtype, gen_method_decl (method));
|
||
}
|
||
|
||
/* Return 1 if TYPE1 is equivalent to TYPE2
|
||
for purposes of method overloading. */
|
||
|
||
static int
|
||
objc_types_are_equivalent (tree type1, tree type2)
|
||
{
|
||
if (type1 == type2)
|
||
return 1;
|
||
|
||
/* Strip away indirections. */
|
||
while ((TREE_CODE (type1) == ARRAY_TYPE || TREE_CODE (type1) == POINTER_TYPE)
|
||
&& (TREE_CODE (type1) == TREE_CODE (type2)))
|
||
type1 = TREE_TYPE (type1), type2 = TREE_TYPE (type2);
|
||
if (TYPE_MAIN_VARIANT (type1) != TYPE_MAIN_VARIANT (type2))
|
||
return 0;
|
||
|
||
type1 = (TYPE_HAS_OBJC_INFO (type1)
|
||
? TYPE_OBJC_PROTOCOL_LIST (type1)
|
||
: NULL_TREE);
|
||
type2 = (TYPE_HAS_OBJC_INFO (type2)
|
||
? TYPE_OBJC_PROTOCOL_LIST (type2)
|
||
: NULL_TREE);
|
||
|
||
if (list_length (type1) == list_length (type2))
|
||
{
|
||
for (; type2; type2 = TREE_CHAIN (type2))
|
||
if (!lookup_protocol_in_reflist (type1, TREE_VALUE (type2)))
|
||
return 0;
|
||
return 1;
|
||
}
|
||
return 0;
|
||
}
|
||
|
||
/* Return 1 if TYPE1 has the same size and alignment as TYPE2. */
|
||
|
||
static int
|
||
objc_types_share_size_and_alignment (tree type1, tree type2)
|
||
{
|
||
return (simple_cst_equal (TYPE_SIZE (type1), TYPE_SIZE (type2))
|
||
&& TYPE_ALIGN (type1) == TYPE_ALIGN (type2));
|
||
}
|
||
|
||
/* Return 1 if PROTO1 is equivalent to PROTO2
|
||
for purposes of method overloading. Ordinarily, the type signatures
|
||
should match up exactly, unless STRICT is zero, in which case we
|
||
shall allow differences in which the size and alignment of a type
|
||
is the same. */
|
||
|
||
static int
|
||
comp_proto_with_proto (tree proto1, tree proto2, int strict)
|
||
{
|
||
tree type1, type2;
|
||
|
||
/* The following test is needed in case there are hashing
|
||
collisions. */
|
||
if (METHOD_SEL_NAME (proto1) != METHOD_SEL_NAME (proto2))
|
||
return 0;
|
||
|
||
/* Compare return types. */
|
||
type1 = TREE_VALUE (TREE_TYPE (proto1));
|
||
type2 = TREE_VALUE (TREE_TYPE (proto2));
|
||
|
||
if (!objc_types_are_equivalent (type1, type2)
|
||
&& (strict || !objc_types_share_size_and_alignment (type1, type2)))
|
||
return 0;
|
||
|
||
/* Compare argument types. */
|
||
for (type1 = get_arg_type_list (proto1, METHOD_REF, 0),
|
||
type2 = get_arg_type_list (proto2, METHOD_REF, 0);
|
||
type1 && type2;
|
||
type1 = TREE_CHAIN (type1), type2 = TREE_CHAIN (type2))
|
||
{
|
||
if (!objc_types_are_equivalent (TREE_VALUE (type1), TREE_VALUE (type2))
|
||
&& (strict
|
||
|| !objc_types_share_size_and_alignment (TREE_VALUE (type1),
|
||
TREE_VALUE (type2))))
|
||
return 0;
|
||
}
|
||
|
||
return (!type1 && !type2);
|
||
}
|
||
|
||
/* Fold an OBJ_TYPE_REF expression for ObjC method dispatches, where
|
||
this occurs. ObjC method dispatches are _not_ like C++ virtual
|
||
member function dispatches, and we account for the difference here. */
|
||
tree
|
||
#ifdef OBJCPLUS
|
||
objc_fold_obj_type_ref (tree ref, tree known_type)
|
||
#else
|
||
objc_fold_obj_type_ref (tree ref ATTRIBUTE_UNUSED,
|
||
tree known_type ATTRIBUTE_UNUSED)
|
||
#endif
|
||
{
|
||
#ifdef OBJCPLUS
|
||
tree v = BINFO_VIRTUALS (TYPE_BINFO (known_type));
|
||
|
||
/* If the receiver does not have virtual member functions, there
|
||
is nothing we can (or need to) do here. */
|
||
if (!v)
|
||
return NULL_TREE;
|
||
|
||
/* Let C++ handle C++ virtual functions. */
|
||
return cp_fold_obj_type_ref (ref, known_type);
|
||
#else
|
||
/* For plain ObjC, we currently do not need to do anything. */
|
||
return NULL_TREE;
|
||
#endif
|
||
}
|
||
|
||
static void
|
||
objc_start_function (tree name, tree type, tree attrs,
|
||
#ifdef OBJCPLUS
|
||
tree params
|
||
#else
|
||
struct c_arg_info *params
|
||
#endif
|
||
)
|
||
{
|
||
tree fndecl = build_decl (FUNCTION_DECL, name, type);
|
||
|
||
#ifdef OBJCPLUS
|
||
DECL_ARGUMENTS (fndecl) = params;
|
||
DECL_INITIAL (fndecl) = error_mark_node;
|
||
DECL_EXTERNAL (fndecl) = 0;
|
||
TREE_STATIC (fndecl) = 1;
|
||
retrofit_lang_decl (fndecl);
|
||
cplus_decl_attributes (&fndecl, attrs, 0);
|
||
start_preparsed_function (fndecl, attrs, /*flags=*/SF_DEFAULT);
|
||
#else
|
||
struct c_label_context_se *nstack_se;
|
||
struct c_label_context_vm *nstack_vm;
|
||
nstack_se = XOBNEW (&parser_obstack, struct c_label_context_se);
|
||
nstack_se->labels_def = NULL;
|
||
nstack_se->labels_used = NULL;
|
||
nstack_se->next = label_context_stack_se;
|
||
label_context_stack_se = nstack_se;
|
||
nstack_vm = XOBNEW (&parser_obstack, struct c_label_context_vm);
|
||
nstack_vm->labels_def = NULL;
|
||
nstack_vm->labels_used = NULL;
|
||
nstack_vm->scope = 0;
|
||
nstack_vm->next = label_context_stack_vm;
|
||
label_context_stack_vm = nstack_vm;
|
||
current_function_returns_value = 0; /* Assume, until we see it does. */
|
||
current_function_returns_null = 0;
|
||
|
||
decl_attributes (&fndecl, attrs, 0);
|
||
announce_function (fndecl);
|
||
DECL_INITIAL (fndecl) = error_mark_node;
|
||
DECL_EXTERNAL (fndecl) = 0;
|
||
TREE_STATIC (fndecl) = 1;
|
||
current_function_decl = pushdecl (fndecl);
|
||
push_scope ();
|
||
declare_parm_level ();
|
||
DECL_RESULT (current_function_decl)
|
||
= build_decl (RESULT_DECL, NULL_TREE,
|
||
TREE_TYPE (TREE_TYPE (current_function_decl)));
|
||
DECL_ARTIFICIAL (DECL_RESULT (current_function_decl)) = 1;
|
||
DECL_IGNORED_P (DECL_RESULT (current_function_decl)) = 1;
|
||
start_fname_decls ();
|
||
store_parm_decls_from (params);
|
||
#endif
|
||
|
||
TREE_USED (current_function_decl) = 1;
|
||
}
|
||
|
||
/* - Generate an identifier for the function. the format is "_n_cls",
|
||
where 1 <= n <= nMethods, and cls is the name the implementation we
|
||
are processing.
|
||
- Install the return type from the method declaration.
|
||
- If we have a prototype, check for type consistency. */
|
||
|
||
static void
|
||
really_start_method (tree method,
|
||
#ifdef OBJCPLUS
|
||
tree parmlist
|
||
#else
|
||
struct c_arg_info *parmlist
|
||
#endif
|
||
)
|
||
{
|
||
tree ret_type, meth_type;
|
||
tree method_id;
|
||
const char *sel_name, *class_name, *cat_name;
|
||
char *buf;
|
||
|
||
/* Synth the storage class & assemble the return type. */
|
||
ret_type = TREE_VALUE (TREE_TYPE (method));
|
||
|
||
sel_name = IDENTIFIER_POINTER (METHOD_SEL_NAME (method));
|
||
class_name = IDENTIFIER_POINTER (CLASS_NAME (objc_implementation_context));
|
||
cat_name = ((TREE_CODE (objc_implementation_context)
|
||
== CLASS_IMPLEMENTATION_TYPE)
|
||
? NULL
|
||
: IDENTIFIER_POINTER (CLASS_SUPER_NAME (objc_implementation_context)));
|
||
method_slot++;
|
||
|
||
/* Make sure this is big enough for any plausible method label. */
|
||
buf = (char *) alloca (50 + strlen (sel_name) + strlen (class_name)
|
||
+ (cat_name ? strlen (cat_name) : 0));
|
||
|
||
OBJC_GEN_METHOD_LABEL (buf, TREE_CODE (method) == INSTANCE_METHOD_DECL,
|
||
class_name, cat_name, sel_name, method_slot);
|
||
|
||
method_id = get_identifier (buf);
|
||
|
||
#ifdef OBJCPLUS
|
||
/* Objective-C methods cannot be overloaded, so we don't need
|
||
the type encoding appended. It looks bad anyway... */
|
||
push_lang_context (lang_name_c);
|
||
#endif
|
||
|
||
meth_type
|
||
= build_function_type (ret_type,
|
||
get_arg_type_list (method, METHOD_DEF, 0));
|
||
objc_start_function (method_id, meth_type, NULL_TREE, parmlist);
|
||
|
||
/* Set self_decl from the first argument. */
|
||
self_decl = DECL_ARGUMENTS (current_function_decl);
|
||
|
||
/* Suppress unused warnings. */
|
||
TREE_USED (self_decl) = 1;
|
||
TREE_USED (TREE_CHAIN (self_decl)) = 1;
|
||
#ifdef OBJCPLUS
|
||
pop_lang_context ();
|
||
#endif
|
||
|
||
METHOD_DEFINITION (method) = current_function_decl;
|
||
|
||
/* Check consistency...start_function, pushdecl, duplicate_decls. */
|
||
|
||
if (implementation_template != objc_implementation_context)
|
||
{
|
||
tree proto
|
||
= lookup_method_static (implementation_template,
|
||
METHOD_SEL_NAME (method),
|
||
((TREE_CODE (method) == CLASS_METHOD_DECL)
|
||
| OBJC_LOOKUP_NO_SUPER));
|
||
|
||
if (proto)
|
||
{
|
||
if (!comp_proto_with_proto (method, proto, 1))
|
||
{
|
||
char type = (TREE_CODE (method) == INSTANCE_METHOD_DECL ? '-' : '+');
|
||
|
||
warn_with_method ("conflicting types for", type, method);
|
||
warn_with_method ("previous declaration of", type, proto);
|
||
}
|
||
}
|
||
else
|
||
{
|
||
/* We have a method @implementation even though we did not
|
||
see a corresponding @interface declaration (which is allowed
|
||
by Objective-C rules). Go ahead and place the method in
|
||
the @interface anyway, so that message dispatch lookups
|
||
will see it. */
|
||
tree interface = implementation_template;
|
||
|
||
if (TREE_CODE (objc_implementation_context)
|
||
== CATEGORY_IMPLEMENTATION_TYPE)
|
||
interface = lookup_category
|
||
(interface,
|
||
CLASS_SUPER_NAME (objc_implementation_context));
|
||
|
||
if (interface)
|
||
objc_add_method (interface, copy_node (method),
|
||
TREE_CODE (method) == CLASS_METHOD_DECL);
|
||
}
|
||
}
|
||
}
|
||
|
||
static void *UOBJC_SUPER_scope = 0;
|
||
|
||
/* _n_Method (id self, SEL sel, ...)
|
||
{
|
||
struct objc_super _S;
|
||
_msgSuper ((_S.self = self, _S.class = _cls, &_S), ...);
|
||
} */
|
||
|
||
static tree
|
||
get_super_receiver (void)
|
||
{
|
||
if (objc_method_context)
|
||
{
|
||
tree super_expr, super_expr_list;
|
||
|
||
if (!UOBJC_SUPER_decl)
|
||
{
|
||
UOBJC_SUPER_decl = build_decl (VAR_DECL, get_identifier (TAG_SUPER),
|
||
objc_super_template);
|
||
/* This prevents `unused variable' warnings when compiling with -Wall. */
|
||
TREE_USED (UOBJC_SUPER_decl) = 1;
|
||
lang_hooks.decls.pushdecl (UOBJC_SUPER_decl);
|
||
finish_decl (UOBJC_SUPER_decl, NULL_TREE, NULL_TREE);
|
||
UOBJC_SUPER_scope = objc_get_current_scope ();
|
||
}
|
||
|
||
/* Set receiver to self. */
|
||
super_expr = objc_build_component_ref (UOBJC_SUPER_decl, self_id);
|
||
super_expr = build_modify_expr (super_expr, NOP_EXPR, self_decl);
|
||
super_expr_list = super_expr;
|
||
|
||
/* Set class to begin searching. */
|
||
super_expr = objc_build_component_ref (UOBJC_SUPER_decl,
|
||
get_identifier ("super_class"));
|
||
|
||
if (TREE_CODE (objc_implementation_context) == CLASS_IMPLEMENTATION_TYPE)
|
||
{
|
||
/* [_cls, __cls]Super are "pre-built" in
|
||
synth_forward_declarations. */
|
||
|
||
super_expr = build_modify_expr (super_expr, NOP_EXPR,
|
||
((TREE_CODE (objc_method_context)
|
||
== INSTANCE_METHOD_DECL)
|
||
? ucls_super_ref
|
||
: uucls_super_ref));
|
||
}
|
||
|
||
else
|
||
/* We have a category. */
|
||
{
|
||
tree super_name = CLASS_SUPER_NAME (implementation_template);
|
||
tree super_class;
|
||
|
||
/* Barf if super used in a category of Object. */
|
||
if (!super_name)
|
||
{
|
||
error ("no super class declared in interface for %qs",
|
||
IDENTIFIER_POINTER (CLASS_NAME (implementation_template)));
|
||
return error_mark_node;
|
||
}
|
||
|
||
if (flag_next_runtime && !flag_zero_link)
|
||
{
|
||
super_class = objc_get_class_reference (super_name);
|
||
if (TREE_CODE (objc_method_context) == CLASS_METHOD_DECL)
|
||
/* 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
|
||
(build_c_cast (build_pointer_type (objc_class_type),
|
||
super_class), "unary *");
|
||
}
|
||
else
|
||
{
|
||
add_class_reference (super_name);
|
||
super_class = (TREE_CODE (objc_method_context) == INSTANCE_METHOD_DECL
|
||
? objc_get_class_decl : objc_get_meta_class_decl);
|
||
assemble_external (super_class);
|
||
super_class
|
||
= build_function_call
|
||
(super_class,
|
||
build_tree_list
|
||
(NULL_TREE,
|
||
my_build_string_pointer
|
||
(IDENTIFIER_LENGTH (super_name) + 1,
|
||
IDENTIFIER_POINTER (super_name))));
|
||
}
|
||
|
||
super_expr
|
||
= build_modify_expr (super_expr, NOP_EXPR,
|
||
build_c_cast (TREE_TYPE (super_expr),
|
||
super_class));
|
||
}
|
||
|
||
super_expr_list = build_compound_expr (super_expr_list, super_expr);
|
||
|
||
super_expr = build_unary_op (ADDR_EXPR, UOBJC_SUPER_decl, 0);
|
||
super_expr_list = build_compound_expr (super_expr_list, super_expr);
|
||
|
||
return super_expr_list;
|
||
}
|
||
else
|
||
{
|
||
error ("[super ...] must appear in a method context");
|
||
return error_mark_node;
|
||
}
|
||
}
|
||
|
||
/* When exiting a scope, sever links to a 'super' declaration (if any)
|
||
therein contained. */
|
||
|
||
void
|
||
objc_clear_super_receiver (void)
|
||
{
|
||
if (objc_method_context
|
||
&& UOBJC_SUPER_scope == objc_get_current_scope ()) {
|
||
UOBJC_SUPER_decl = 0;
|
||
UOBJC_SUPER_scope = 0;
|
||
}
|
||
}
|
||
|
||
void
|
||
objc_finish_method_definition (tree fndecl)
|
||
{
|
||
/* We cannot validly inline ObjC methods, at least not without a language
|
||
extension to declare that a method need not be dynamically
|
||
dispatched, so suppress all thoughts of doing so. */
|
||
DECL_INLINE (fndecl) = 0;
|
||
DECL_UNINLINABLE (fndecl) = 1;
|
||
|
||
#ifndef OBJCPLUS
|
||
/* The C++ front-end will have called finish_function() for us. */
|
||
finish_function ();
|
||
#endif
|
||
|
||
METHOD_ENCODING (objc_method_context)
|
||
= encode_method_prototype (objc_method_context);
|
||
|
||
/* Required to implement _msgSuper. This must be done AFTER finish_function,
|
||
since the optimizer may find "may be used before set" errors. */
|
||
objc_method_context = NULL_TREE;
|
||
|
||
if (should_call_super_dealloc)
|
||
warning (0, "method possibly missing a [super dealloc] call");
|
||
}
|
||
|
||
#if 0
|
||
int
|
||
lang_report_error_function (tree decl)
|
||
{
|
||
if (objc_method_context)
|
||
{
|
||
fprintf (stderr, "In method %qs\n",
|
||
IDENTIFIER_POINTER (METHOD_SEL_NAME (objc_method_context)));
|
||
return 1;
|
||
}
|
||
|
||
else
|
||
return 0;
|
||
}
|
||
#endif
|
||
|
||
/* Given a tree DECL node, produce a printable description of it in the given
|
||
buffer, overwriting the buffer. */
|
||
|
||
static char *
|
||
gen_declaration (tree decl)
|
||
{
|
||
errbuf[0] = '\0';
|
||
|
||
if (DECL_P (decl))
|
||
{
|
||
gen_type_name_0 (TREE_TYPE (decl));
|
||
|
||
if (DECL_NAME (decl))
|
||
{
|
||
if (!POINTER_TYPE_P (TREE_TYPE (decl)))
|
||
strcat (errbuf, " ");
|
||
|
||
strcat (errbuf, IDENTIFIER_POINTER (DECL_NAME (decl)));
|
||
}
|
||
|
||
if (DECL_INITIAL (decl)
|
||
&& TREE_CODE (DECL_INITIAL (decl)) == INTEGER_CST)
|
||
sprintf (errbuf + strlen (errbuf), ": " HOST_WIDE_INT_PRINT_DEC,
|
||
TREE_INT_CST_LOW (DECL_INITIAL (decl)));
|
||
}
|
||
|
||
return errbuf;
|
||
}
|
||
|
||
/* Given a tree TYPE node, produce a printable description of it in the given
|
||
buffer, overwriting the buffer. */
|
||
|
||
static char *
|
||
gen_type_name_0 (tree type)
|
||
{
|
||
tree orig = type, proto;
|
||
|
||
if (TYPE_P (type) && TYPE_NAME (type))
|
||
type = TYPE_NAME (type);
|
||
else if (POINTER_TYPE_P (type) || TREE_CODE (type) == ARRAY_TYPE)
|
||
{
|
||
tree inner = TREE_TYPE (type);
|
||
|
||
while (TREE_CODE (inner) == ARRAY_TYPE)
|
||
inner = TREE_TYPE (inner);
|
||
|
||
gen_type_name_0 (inner);
|
||
|
||
if (!POINTER_TYPE_P (inner))
|
||
strcat (errbuf, " ");
|
||
|
||
if (POINTER_TYPE_P (type))
|
||
strcat (errbuf, "*");
|
||
else
|
||
while (type != inner)
|
||
{
|
||
strcat (errbuf, "[");
|
||
|
||
if (TYPE_DOMAIN (type))
|
||
{
|
||
char sz[20];
|
||
|
||
sprintf (sz, HOST_WIDE_INT_PRINT_DEC,
|
||
(TREE_INT_CST_LOW
|
||
(TYPE_MAX_VALUE (TYPE_DOMAIN (type))) + 1));
|
||
strcat (errbuf, sz);
|
||
}
|
||
|
||
strcat (errbuf, "]");
|
||
type = TREE_TYPE (type);
|
||
}
|
||
|
||
goto exit_function;
|
||
}
|
||
|
||
if (TREE_CODE (type) == TYPE_DECL && DECL_NAME (type))
|
||
type = DECL_NAME (type);
|
||
|
||
strcat (errbuf, TREE_CODE (type) == IDENTIFIER_NODE
|
||
? IDENTIFIER_POINTER (type)
|
||
: "");
|
||
|
||
/* For 'id' and 'Class', adopted protocols are stored in the pointee. */
|
||
if (objc_is_id (orig))
|
||
orig = TREE_TYPE (orig);
|
||
|
||
proto = TYPE_HAS_OBJC_INFO (orig) ? TYPE_OBJC_PROTOCOL_LIST (orig) : NULL_TREE;
|
||
|
||
if (proto)
|
||
{
|
||
strcat (errbuf, " <");
|
||
|
||
while (proto) {
|
||
strcat (errbuf,
|
||
IDENTIFIER_POINTER (PROTOCOL_NAME (TREE_VALUE (proto))));
|
||
proto = TREE_CHAIN (proto);
|
||
strcat (errbuf, proto ? ", " : ">");
|
||
}
|
||
}
|
||
|
||
exit_function:
|
||
return errbuf;
|
||
}
|
||
|
||
static char *
|
||
gen_type_name (tree type)
|
||
{
|
||
errbuf[0] = '\0';
|
||
|
||
return gen_type_name_0 (type);
|
||
}
|
||
|
||
/* Given a method tree, put a printable description into the given
|
||
buffer (overwriting) and return a pointer to the buffer. */
|
||
|
||
static char *
|
||
gen_method_decl (tree method)
|
||
{
|
||
tree chain;
|
||
|
||
strcpy (errbuf, "("); /* NB: Do _not_ call strcat() here. */
|
||
gen_type_name_0 (TREE_VALUE (TREE_TYPE (method)));
|
||
strcat (errbuf, ")");
|
||
chain = METHOD_SEL_ARGS (method);
|
||
|
||
if (chain)
|
||
{
|
||
/* We have a chain of keyword_decls. */
|
||
do
|
||
{
|
||
if (KEYWORD_KEY_NAME (chain))
|
||
strcat (errbuf, IDENTIFIER_POINTER (KEYWORD_KEY_NAME (chain)));
|
||
|
||
strcat (errbuf, ":(");
|
||
gen_type_name_0 (TREE_VALUE (TREE_TYPE (chain)));
|
||
strcat (errbuf, ")");
|
||
|
||
strcat (errbuf, IDENTIFIER_POINTER (KEYWORD_ARG_NAME (chain)));
|
||
if ((chain = TREE_CHAIN (chain)))
|
||
strcat (errbuf, " ");
|
||
}
|
||
while (chain);
|
||
|
||
if (METHOD_ADD_ARGS (method))
|
||
{
|
||
chain = TREE_CHAIN (METHOD_ADD_ARGS (method));
|
||
|
||
/* Know we have a chain of parm_decls. */
|
||
while (chain)
|
||
{
|
||
strcat (errbuf, ", ");
|
||
gen_type_name_0 (TREE_TYPE (TREE_VALUE (chain)));
|
||
chain = TREE_CHAIN (chain);
|
||
}
|
||
|
||
if (METHOD_ADD_ARGS_ELLIPSIS_P (method))
|
||
strcat (errbuf, ", ...");
|
||
}
|
||
}
|
||
|
||
else
|
||
/* We have a unary selector. */
|
||
strcat (errbuf, IDENTIFIER_POINTER (METHOD_SEL_NAME (method)));
|
||
|
||
return errbuf;
|
||
}
|
||
|
||
/* Debug info. */
|
||
|
||
|
||
/* Dump an @interface declaration of the supplied class CHAIN to the
|
||
supplied file FP. Used to implement the -gen-decls option (which
|
||
prints out an @interface declaration of all classes compiled in
|
||
this run); potentially useful for debugging the compiler too. */
|
||
static void
|
||
dump_interface (FILE *fp, tree chain)
|
||
{
|
||
/* FIXME: A heap overflow here whenever a method (or ivar)
|
||
declaration is so long that it doesn't fit in the buffer. The
|
||
code and all the related functions should be rewritten to avoid
|
||
using fixed size buffers. */
|
||
const char *my_name = IDENTIFIER_POINTER (CLASS_NAME (chain));
|
||
tree ivar_decls = CLASS_RAW_IVARS (chain);
|
||
tree nst_methods = CLASS_NST_METHODS (chain);
|
||
tree cls_methods = CLASS_CLS_METHODS (chain);
|
||
|
||
fprintf (fp, "\n@interface %s", my_name);
|
||
|
||
/* CLASS_SUPER_NAME is used to store the superclass name for
|
||
classes, and the category name for categories. */
|
||
if (CLASS_SUPER_NAME (chain))
|
||
{
|
||
const char *name = IDENTIFIER_POINTER (CLASS_SUPER_NAME (chain));
|
||
|
||
if (TREE_CODE (chain) == CATEGORY_IMPLEMENTATION_TYPE
|
||
|| TREE_CODE (chain) == CATEGORY_INTERFACE_TYPE)
|
||
{
|
||
fprintf (fp, " (%s)\n", name);
|
||
}
|
||
else
|
||
{
|
||
fprintf (fp, " : %s\n", name);
|
||
}
|
||
}
|
||
else
|
||
fprintf (fp, "\n");
|
||
|
||
/* FIXME - the following doesn't seem to work at the moment. */
|
||
if (ivar_decls)
|
||
{
|
||
fprintf (fp, "{\n");
|
||
do
|
||
{
|
||
fprintf (fp, "\t%s;\n", gen_declaration (ivar_decls));
|
||
ivar_decls = TREE_CHAIN (ivar_decls);
|
||
}
|
||
while (ivar_decls);
|
||
fprintf (fp, "}\n");
|
||
}
|
||
|
||
while (nst_methods)
|
||
{
|
||
fprintf (fp, "- %s;\n", gen_method_decl (nst_methods));
|
||
nst_methods = TREE_CHAIN (nst_methods);
|
||
}
|
||
|
||
while (cls_methods)
|
||
{
|
||
fprintf (fp, "+ %s;\n", gen_method_decl (cls_methods));
|
||
cls_methods = TREE_CHAIN (cls_methods);
|
||
}
|
||
|
||
fprintf (fp, "@end\n");
|
||
}
|
||
|
||
/* Demangle function for Objective-C */
|
||
static const char *
|
||
objc_demangle (const char *mangled)
|
||
{
|
||
char *demangled, *cp;
|
||
|
||
if (mangled[0] == '_' &&
|
||
(mangled[1] == 'i' || mangled[1] == 'c') &&
|
||
mangled[2] == '_')
|
||
{
|
||
cp = demangled = XNEWVEC (char, strlen(mangled) + 2);
|
||
if (mangled[1] == 'i')
|
||
*cp++ = '-'; /* for instance method */
|
||
else
|
||
*cp++ = '+'; /* for class method */
|
||
*cp++ = '['; /* opening left brace */
|
||
strcpy(cp, mangled+3); /* tack on the rest of the mangled name */
|
||
while (*cp && *cp == '_')
|
||
cp++; /* skip any initial underbars in class name */
|
||
cp = strchr(cp, '_'); /* find first non-initial underbar */
|
||
if (cp == NULL)
|
||
{
|
||
free(demangled); /* not mangled name */
|
||
return mangled;
|
||
}
|
||
if (cp[1] == '_') /* easy case: no category name */
|
||
{
|
||
*cp++ = ' '; /* replace two '_' with one ' ' */
|
||
strcpy(cp, mangled + (cp - demangled) + 2);
|
||
}
|
||
else
|
||
{
|
||
*cp++ = '('; /* less easy case: category name */
|
||
cp = strchr(cp, '_');
|
||
if (cp == 0)
|
||
{
|
||
free(demangled); /* not mangled name */
|
||
return mangled;
|
||
}
|
||
*cp++ = ')';
|
||
*cp++ = ' '; /* overwriting 1st char of method name... */
|
||
strcpy(cp, mangled + (cp - demangled)); /* get it back */
|
||
}
|
||
while (*cp && *cp == '_')
|
||
cp++; /* skip any initial underbars in method name */
|
||
for (; *cp; cp++)
|
||
if (*cp == '_')
|
||
*cp = ':'; /* replace remaining '_' with ':' */
|
||
*cp++ = ']'; /* closing right brace */
|
||
*cp++ = 0; /* string terminator */
|
||
return demangled;
|
||
}
|
||
else
|
||
return mangled; /* not an objc mangled name */
|
||
}
|
||
|
||
const char *
|
||
objc_printable_name (tree decl, int kind ATTRIBUTE_UNUSED)
|
||
{
|
||
return objc_demangle (IDENTIFIER_POINTER (DECL_NAME (decl)));
|
||
}
|
||
|
||
static void
|
||
init_objc (void)
|
||
{
|
||
gcc_obstack_init (&util_obstack);
|
||
util_firstobj = (char *) obstack_finish (&util_obstack);
|
||
|
||
errbuf = XNEWVEC (char, 1024 * 10);
|
||
hash_init ();
|
||
synth_module_prologue ();
|
||
}
|
||
|
||
static void
|
||
finish_objc (void)
|
||
{
|
||
struct imp_entry *impent;
|
||
tree chain;
|
||
/* The internally generated initializers appear to have missing braces.
|
||
Don't warn about this. */
|
||
int save_warn_missing_braces = warn_missing_braces;
|
||
warn_missing_braces = 0;
|
||
|
||
/* A missing @end may not be detected by the parser. */
|
||
if (objc_implementation_context)
|
||
{
|
||
warning (0, "%<@end%> missing in implementation context");
|
||
finish_class (objc_implementation_context);
|
||
objc_ivar_chain = NULL_TREE;
|
||
objc_implementation_context = NULL_TREE;
|
||
}
|
||
|
||
/* Process the static instances here because initialization of objc_symtab
|
||
depends on them. */
|
||
if (objc_static_instances)
|
||
generate_static_references ();
|
||
|
||
if (imp_list || class_names_chain
|
||
|| meth_var_names_chain || meth_var_types_chain || sel_ref_chain)
|
||
generate_objc_symtab_decl ();
|
||
|
||
for (impent = imp_list; impent; impent = impent->next)
|
||
{
|
||
objc_implementation_context = impent->imp_context;
|
||
implementation_template = impent->imp_template;
|
||
|
||
UOBJC_CLASS_decl = impent->class_decl;
|
||
UOBJC_METACLASS_decl = impent->meta_decl;
|
||
|
||
/* Dump the @interface of each class as we compile it, if the
|
||
-gen-decls option is in use. 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, objc_implementation_context);
|
||
}
|
||
|
||
if (TREE_CODE (objc_implementation_context) == CLASS_IMPLEMENTATION_TYPE)
|
||
{
|
||
/* all of the following reference the string pool... */
|
||
generate_ivar_lists ();
|
||
generate_dispatch_tables ();
|
||
generate_shared_structures (impent->has_cxx_cdtors
|
||
? CLS_HAS_CXX_STRUCTORS
|
||
: 0);
|
||
}
|
||
else
|
||
{
|
||
generate_dispatch_tables ();
|
||
generate_category (objc_implementation_context);
|
||
}
|
||
}
|
||
|
||
/* If we are using an array of selectors, we must always
|
||
finish up the array decl even if no selectors were used. */
|
||
if (! flag_next_runtime || sel_ref_chain)
|
||
build_selector_translation_table ();
|
||
|
||
if (protocol_chain)
|
||
generate_protocols ();
|
||
|
||
if ((flag_replace_objc_classes && imp_list) || flag_objc_gc)
|
||
generate_objc_image_info ();
|
||
|
||
/* Arrange for ObjC data structures to be initialized at run time. */
|
||
if (objc_implementation_context || class_names_chain || objc_static_instances
|
||
|| meth_var_names_chain || meth_var_types_chain || sel_ref_chain)
|
||
{
|
||
build_module_descriptor ();
|
||
|
||
if (!flag_next_runtime)
|
||
build_module_initializer_routine ();
|
||
}
|
||
|
||
/* Dump the class references. This forces the appropriate classes
|
||
to be linked into the executable image, preserving unix archive
|
||
semantics. This can be removed when we move to a more dynamically
|
||
linked environment. */
|
||
|
||
for (chain = cls_ref_chain; chain; chain = TREE_CHAIN (chain))
|
||
{
|
||
handle_class_ref (chain);
|
||
if (TREE_PURPOSE (chain))
|
||
generate_classref_translation_entry (chain);
|
||
}
|
||
|
||
for (impent = imp_list; impent; impent = impent->next)
|
||
handle_impent (impent);
|
||
|
||
if (warn_selector)
|
||
{
|
||
int slot;
|
||
hash hsh;
|
||
|
||
/* Run through the selector hash tables and print a warning for any
|
||
selector which has multiple methods. */
|
||
|
||
for (slot = 0; slot < SIZEHASHTABLE; slot++)
|
||
{
|
||
for (hsh = cls_method_hash_list[slot]; hsh; hsh = hsh->next)
|
||
check_duplicates (hsh, 0, 1);
|
||
for (hsh = nst_method_hash_list[slot]; hsh; hsh = hsh->next)
|
||
check_duplicates (hsh, 0, 1);
|
||
}
|
||
}
|
||
|
||
warn_missing_braces = save_warn_missing_braces;
|
||
}
|
||
|
||
/* Subroutines of finish_objc. */
|
||
|
||
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! */
|
||
|
||
/* The decl that is the one that we
|
||
forward declared in build_class_reference. */
|
||
finish_var_decl (decl, expr);
|
||
return;
|
||
}
|
||
|
||
static void
|
||
handle_class_ref (tree chain)
|
||
{
|
||
const char *name = IDENTIFIER_POINTER (TREE_VALUE (chain));
|
||
char *string = (char *) alloca (strlen (name) + 30);
|
||
tree decl;
|
||
tree exp;
|
||
|
||
sprintf (string, "%sobjc_class_name_%s",
|
||
(flag_next_runtime ? "." : "__"), name);
|
||
|
||
#ifdef ASM_DECLARE_UNRESOLVED_REFERENCE
|
||
if (flag_next_runtime)
|
||
{
|
||
ASM_DECLARE_UNRESOLVED_REFERENCE (asm_out_file, string);
|
||
return;
|
||
}
|
||
#endif
|
||
|
||
/* Make a decl for this name, so we can use its address in a tree. */
|
||
decl = build_decl (VAR_DECL, get_identifier (string), char_type_node);
|
||
DECL_EXTERNAL (decl) = 1;
|
||
TREE_PUBLIC (decl) = 1;
|
||
|
||
pushdecl (decl);
|
||
rest_of_decl_compilation (decl, 0, 0);
|
||
|
||
/* Make a decl for the address. */
|
||
sprintf (string, "%sobjc_class_ref_%s",
|
||
(flag_next_runtime ? "." : "__"), name);
|
||
exp = build1 (ADDR_EXPR, string_type_node, decl);
|
||
decl = build_decl (VAR_DECL, get_identifier (string), string_type_node);
|
||
DECL_INITIAL (decl) = exp;
|
||
TREE_STATIC (decl) = 1;
|
||
TREE_USED (decl) = 1;
|
||
/* Force the output of the decl as this forces the reference of the class. */
|
||
mark_decl_referenced (decl);
|
||
|
||
pushdecl (decl);
|
||
rest_of_decl_compilation (decl, 0, 0);
|
||
}
|
||
|
||
static void
|
||
handle_impent (struct imp_entry *impent)
|
||
{
|
||
char *string;
|
||
|
||
objc_implementation_context = impent->imp_context;
|
||
implementation_template = impent->imp_template;
|
||
|
||
if (TREE_CODE (impent->imp_context) == CLASS_IMPLEMENTATION_TYPE)
|
||
{
|
||
const char *const class_name =
|
||
IDENTIFIER_POINTER (CLASS_NAME (impent->imp_context));
|
||
|
||
string = (char *) alloca (strlen (class_name) + 30);
|
||
|
||
sprintf (string, "%sobjc_class_name_%s",
|
||
(flag_next_runtime ? "." : "__"), class_name);
|
||
}
|
||
else if (TREE_CODE (impent->imp_context) == CATEGORY_IMPLEMENTATION_TYPE)
|
||
{
|
||
const char *const class_name =
|
||
IDENTIFIER_POINTER (CLASS_NAME (impent->imp_context));
|
||
const char *const class_super_name =
|
||
IDENTIFIER_POINTER (CLASS_SUPER_NAME (impent->imp_context));
|
||
|
||
string = (char *) alloca (strlen (class_name)
|
||
+ strlen (class_super_name) + 30);
|
||
|
||
/* Do the same for categories. Even though no references to
|
||
these symbols are generated automatically by the compiler, it
|
||
gives you a handle to pull them into an archive by hand. */
|
||
sprintf (string, "*%sobjc_category_name_%s_%s",
|
||
(flag_next_runtime ? "." : "__"), class_name, class_super_name);
|
||
}
|
||
else
|
||
return;
|
||
|
||
#ifdef ASM_DECLARE_CLASS_REFERENCE
|
||
if (flag_next_runtime)
|
||
{
|
||
ASM_DECLARE_CLASS_REFERENCE (asm_out_file, string);
|
||
return;
|
||
}
|
||
else
|
||
#endif
|
||
{
|
||
tree decl, init;
|
||
|
||
init = build_int_cst (c_common_type_for_size (BITS_PER_WORD, 1), 0);
|
||
decl = build_decl (VAR_DECL, get_identifier (string), TREE_TYPE (init));
|
||
TREE_PUBLIC (decl) = 1;
|
||
TREE_READONLY (decl) = 1;
|
||
TREE_USED (decl) = 1;
|
||
TREE_CONSTANT (decl) = 1;
|
||
DECL_CONTEXT (decl) = 0;
|
||
DECL_ARTIFICIAL (decl) = 1;
|
||
DECL_INITIAL (decl) = init;
|
||
assemble_variable (decl, 1, 0, 0);
|
||
}
|
||
}
|
||
|
||
/* 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, initlist;
|
||
int flags
|
||
= ((flag_replace_objc_classes && imp_list ? 1 : 0)
|
||
| (flag_objc_gc ? 2 : 0));
|
||
|
||
decl = start_var_decl (build_array_type
|
||
(integer_type_node,
|
||
build_index_type (build_int_cst (NULL_TREE, 2 - 1))),
|
||
"_OBJC_IMAGE_INFO");
|
||
|
||
initlist = build_tree_list (NULL_TREE, build_int_cst (NULL_TREE, 0));
|
||
initlist = tree_cons (NULL_TREE, build_int_cst (NULL_TREE, flags), initlist);
|
||
initlist = objc_build_constructor (TREE_TYPE (decl), nreverse (initlist));
|
||
|
||
finish_var_decl (decl, initlist);
|
||
}
|
||
|
||
/* Look up ID as an instance variable. OTHER contains the result of
|
||
the C or C++ lookup, which we may want to use instead. */
|
||
|
||
tree
|
||
objc_lookup_ivar (tree other, tree id)
|
||
{
|
||
tree ivar;
|
||
|
||
/* If we are not inside of an ObjC method, ivar lookup makes no sense. */
|
||
if (!objc_method_context)
|
||
return other;
|
||
|
||
if (!strcmp (IDENTIFIER_POINTER (id), "super"))
|
||
/* We have a message to super. */
|
||
return get_super_receiver ();
|
||
|
||
/* In a class method, look up an instance variable only as a last
|
||
resort. */
|
||
if (TREE_CODE (objc_method_context) == CLASS_METHOD_DECL
|
||
&& other && other != error_mark_node)
|
||
return other;
|
||
|
||
/* Look up the ivar, but do not use it if it is not accessible. */
|
||
ivar = is_ivar (objc_ivar_chain, id);
|
||
|
||
if (!ivar || is_private (ivar))
|
||
return other;
|
||
|
||
/* In an instance method, a local variable (or parameter) may hide the
|
||
instance variable. */
|
||
if (TREE_CODE (objc_method_context) == INSTANCE_METHOD_DECL
|
||
&& other && other != error_mark_node
|
||
#ifdef OBJCPLUS
|
||
&& CP_DECL_CONTEXT (other) != global_namespace)
|
||
#else
|
||
&& !DECL_FILE_SCOPE_P (other))
|
||
#endif
|
||
{
|
||
warning (0, "local declaration of %qs hides instance variable",
|
||
IDENTIFIER_POINTER (id));
|
||
|
||
return other;
|
||
}
|
||
|
||
/* At this point, we are either in an instance method with no obscuring
|
||
local definitions, or in a class method with no alternate definitions
|
||
at all. */
|
||
return build_ivar_reference (id);
|
||
}
|
||
|
||
/* Possibly rewrite a function CALL into an OBJ_TYPE_REF expression. This
|
||
needs to be done if we are calling a function through a cast. */
|
||
|
||
tree
|
||
objc_rewrite_function_call (tree function, tree params)
|
||
{
|
||
if (TREE_CODE (function) == NOP_EXPR
|
||
&& TREE_CODE (TREE_OPERAND (function, 0)) == ADDR_EXPR
|
||
&& TREE_CODE (TREE_OPERAND (TREE_OPERAND (function, 0), 0))
|
||
== FUNCTION_DECL)
|
||
{
|
||
function = build3 (OBJ_TYPE_REF, TREE_TYPE (function),
|
||
TREE_OPERAND (function, 0),
|
||
TREE_VALUE (params), size_zero_node);
|
||
}
|
||
|
||
return function;
|
||
}
|
||
|
||
/* Look for the special case of OBJC_TYPE_REF with the address of
|
||
a function in OBJ_TYPE_REF_EXPR (presumably objc_msgSend or one
|
||
of its cousins). */
|
||
|
||
enum gimplify_status
|
||
objc_gimplify_expr (tree *expr_p, tree *pre_p, tree *post_p)
|
||
{
|
||
enum gimplify_status r0, r1;
|
||
if (TREE_CODE (*expr_p) == OBJ_TYPE_REF
|
||
&& TREE_CODE (OBJ_TYPE_REF_EXPR (*expr_p)) == ADDR_EXPR
|
||
&& TREE_CODE (TREE_OPERAND (OBJ_TYPE_REF_EXPR (*expr_p), 0))
|
||
== FUNCTION_DECL)
|
||
{
|
||
/* Postincrements in OBJ_TYPE_REF_OBJECT don't affect the
|
||
value of the OBJ_TYPE_REF, so force them to be emitted
|
||
during subexpression evaluation rather than after the
|
||
OBJ_TYPE_REF. This permits objc_msgSend calls in Objective
|
||
C to use direct rather than indirect calls when the
|
||
object expression has a postincrement. */
|
||
r0 = gimplify_expr (&OBJ_TYPE_REF_OBJECT (*expr_p), pre_p, NULL,
|
||
is_gimple_val, fb_rvalue);
|
||
r1 = gimplify_expr (&OBJ_TYPE_REF_EXPR (*expr_p), pre_p, post_p,
|
||
is_gimple_val, fb_rvalue);
|
||
|
||
return MIN (r0, r1);
|
||
}
|
||
|
||
#ifdef OBJCPLUS
|
||
return cp_gimplify_expr (expr_p, pre_p, post_p);
|
||
#else
|
||
return c_gimplify_expr (expr_p, pre_p, post_p);
|
||
#endif
|
||
}
|
||
|
||
/* Given a CALL expression, find the function being called. The ObjC
|
||
version looks for the OBJ_TYPE_REF_EXPR which is used for objc_msgSend. */
|
||
|
||
tree
|
||
objc_get_callee_fndecl (tree call_expr)
|
||
{
|
||
tree addr = TREE_OPERAND (call_expr, 0);
|
||
if (TREE_CODE (addr) != OBJ_TYPE_REF)
|
||
return 0;
|
||
|
||
addr = OBJ_TYPE_REF_EXPR (addr);
|
||
|
||
/* If the address is just `&f' for some function `f', then we know
|
||
that `f' is being called. */
|
||
if (TREE_CODE (addr) == ADDR_EXPR
|
||
&& TREE_CODE (TREE_OPERAND (addr, 0)) == FUNCTION_DECL)
|
||
return TREE_OPERAND (addr, 0);
|
||
|
||
return 0;
|
||
}
|
||
|
||
#include "gt-objc-objc-act.h"
|