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111
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1 /* GNU Runtime ABI version 8
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2 Copyright (C) 2011-2017 Free Software Foundation, Inc.
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3 Contributed by Iain Sandoe (split from objc-act.c)
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4
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5 This file is part of GCC.
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6
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7 GCC is free software; you can redistribute it and/or modify
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8 it under the terms of the GNU General Public License as published by
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9 the Free Software Foundation; either version 3, or (at your option)
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10 any later version.
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11
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12 GCC is distributed in the hope that it will be useful,
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13 but WITHOUT ANY WARRANTY; without even the implied warranty of
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14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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15 GNU General Public License for more details.
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16
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17 You should have received a copy of the GNU General Public License
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18 along with GCC; see the file COPYING3. If not see
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19 <http://www.gnu.org/licenses/>. */
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20
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21 #include "config.h"
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22 #include "system.h"
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23 #include "coretypes.h"
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24 #include "options.h"
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25 #include "tree.h"
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26 #include "stringpool.h"
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27 #include "attribs.h"
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28
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29 #ifdef OBJCPLUS
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30 #include "cp/cp-tree.h"
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31 #else
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32 #include "c/c-tree.h"
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33 #include "c/c-lang.h"
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34 #endif
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35
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36 #include "langhooks.h"
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37 #include "c-family/c-objc.h"
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38 #include "objc-act.h"
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39
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40 /* When building Objective-C++, we are not linking against the C front-end
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41 and so need to replicate the C tree-construction functions in some way. */
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42 #ifdef OBJCPLUS
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43 #define OBJCP_REMAP_FUNCTIONS
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44 #include "objcp-decl.h"
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45 #endif /* OBJCPLUS */
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46
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47 #include "toplev.h"
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48 #include "tree-iterator.h"
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49
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50 #include "objc-runtime-hooks.h"
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51 #include "objc-runtime-shared-support.h"
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52 #include "objc-encoding.h"
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53
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54 /* GNU runtime private definitions. */
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55 #define DEF_CONSTANT_STRING_CLASS_NAME "NXConstantString"
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56
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57 #define TAG_GETCLASS "objc_get_class"
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58 #define TAG_GETMETACLASS "objc_get_meta_class"
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59
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60 #define TAG_MSGSEND "objc_msg_lookup"
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61 #define TAG_MSGSENDSUPER "objc_msg_lookup_super"
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62
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63 /* GNU-specific tags. */
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64
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65 #define TAG_EXECCLASS "__objc_exec_class"
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66 #define TAG_GNUINIT "__objc_gnu_init"
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67
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68 /* The version identifies which language generation and runtime
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69 the module (file) was compiled for, and is recorded in the
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70 module descriptor. */
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71 #define OBJC_VERSION 8
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72
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73 #define PROTOCOL_VERSION 2
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74
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75 /* This macro provides a method of removing ambiguity between runtimes
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76 when LTO is in use on targets supporting multiple runtimes.
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77
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78 For example, at present, any target that includes an implementation of
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79 the NeXT runtime needs to place Objective-C meta-data into specific
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80 named sections. This should _not_ be done for the GNU runtime, and the
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81 following macro is used to attach Objective-C private attributes that may
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82 be used to identify the runtime for which the meta-data are intended. */
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83
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84 #define OBJCMETA(DECL,VERS,KIND) \
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85 if (VERS) \
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86 DECL_ATTRIBUTES (DECL) = build_tree_list ((VERS), (KIND));
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87
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88 static void gnu_runtime_01_initialize (void);
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89
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90 static void build_selector_template (void);
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91
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92 static tree gnu_runtime_abi_01_super_superclassfield_id (void);
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93
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94 static tree gnu_runtime_abi_01_class_decl (tree);
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95 static tree gnu_runtime_abi_01_metaclass_decl (tree);
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96 static tree gnu_runtime_abi_01_category_decl (tree);
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97 static tree gnu_runtime_abi_01_protocol_decl (tree);
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98 static tree gnu_runtime_abi_01_string_decl (tree, const char *, string_section);
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99
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100 static tree gnu_runtime_abi_01_get_class_reference (tree);
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101 static tree gnu_runtime_abi_01_build_typed_selector_reference (location_t, tree,
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102 tree);
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103 static tree gnu_runtime_abi_01_get_protocol_reference (location_t, tree);
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104 static tree gnu_runtime_abi_01_build_ivar_ref (location_t, tree, tree);
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105 static tree gnu_runtime_abi_01_get_class_super_ref (location_t, struct imp_entry *, bool);
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106 static tree gnu_runtime_abi_01_get_category_super_ref (location_t, struct imp_entry *, bool);
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107
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108 static tree gnu_runtime_abi_01_receiver_is_class_object (tree);
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109 static void gnu_runtime_abi_01_get_arg_type_list_base (vec<tree, va_gc> **,
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110 tree, int, int);
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111 static tree gnu_runtime_abi_01_build_objc_method_call (location_t, tree, tree,
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112 tree, tree, tree, int);
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113
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114 static bool gnu_runtime_abi_01_setup_const_string_class_decl (void);
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115 static tree gnu_runtime_abi_01_build_const_string_constructor (location_t, tree,int);
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116
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117 static void objc_generate_v1_gnu_metadata (void);
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118
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119 static tree objc_eh_runtime_type (tree type);
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120 static tree objc_eh_personality (void);
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121 static tree objc_build_exc_ptr (struct objc_try_context **);
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122 static tree build_throw_stmt (location_t, tree, bool);
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123 static tree begin_catch (struct objc_try_context **, tree, tree, tree, bool);
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124 static void finish_catch (struct objc_try_context **, tree);
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125 static tree finish_try_stmt (struct objc_try_context **);
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126
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127 bool
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128 objc_gnu_runtime_abi_01_init (objc_runtime_hooks *rthooks)
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129 {
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130 /* GNU runtime does not need the compiler to change code in order to do GC. */
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131 if (flag_objc_gc)
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132 {
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133 warning_at (0, 0, "%<-fobjc-gc%> is ignored for %<-fgnu-runtime%>");
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134 flag_objc_gc = 0;
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135 }
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136
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137 /* Although I guess we could, we don't currently support SJLJ exceptions for the
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138 GNU runtime. */
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139 if (flag_objc_sjlj_exceptions)
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140 {
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141 inform (UNKNOWN_LOCATION, "%<-fobjc-sjlj-exceptions%> is ignored for %<-fgnu-runtime%>");
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142 flag_objc_sjlj_exceptions = 0;
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143 }
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144
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145 /* TODO: Complain if -fobjc-abi-version=N was used. */
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146
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147 /* TODO: Complain if -fobj-nilcheck was used. */
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148
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149 rthooks->initialize = gnu_runtime_01_initialize;
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150 rthooks->default_constant_string_class_name = DEF_CONSTANT_STRING_CLASS_NAME;
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151 rthooks->tag_getclass = TAG_GETCLASS;
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152 rthooks->super_superclassfield_ident = gnu_runtime_abi_01_super_superclassfield_id;
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153
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154 rthooks->class_decl = gnu_runtime_abi_01_class_decl;
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155 rthooks->metaclass_decl = gnu_runtime_abi_01_metaclass_decl;
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156 rthooks->category_decl = gnu_runtime_abi_01_category_decl;
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157 rthooks->protocol_decl = gnu_runtime_abi_01_protocol_decl;
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158 rthooks->string_decl = gnu_runtime_abi_01_string_decl;
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159
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160 rthooks->get_class_reference = gnu_runtime_abi_01_get_class_reference;
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161 rthooks->build_selector_reference = gnu_runtime_abi_01_build_typed_selector_reference;
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162 rthooks->get_protocol_reference = gnu_runtime_abi_01_get_protocol_reference;
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163 rthooks->build_ivar_reference = gnu_runtime_abi_01_build_ivar_ref;
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164 rthooks->get_class_super_ref = gnu_runtime_abi_01_get_class_super_ref;
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165 rthooks->get_category_super_ref = gnu_runtime_abi_01_get_category_super_ref;
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166
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167 rthooks->receiver_is_class_object = gnu_runtime_abi_01_receiver_is_class_object;
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168 rthooks->get_arg_type_list_base = gnu_runtime_abi_01_get_arg_type_list_base;
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169 rthooks->build_objc_method_call = gnu_runtime_abi_01_build_objc_method_call;
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170
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171 rthooks->setup_const_string_class_decl =
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172 gnu_runtime_abi_01_setup_const_string_class_decl;
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173 rthooks->build_const_string_constructor =
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174 gnu_runtime_abi_01_build_const_string_constructor;
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175
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176 rthooks->build_throw_stmt = build_throw_stmt;
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177 rthooks->build_exc_ptr = objc_build_exc_ptr;
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178 rthooks->begin_catch = begin_catch;
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179 rthooks->finish_catch = finish_catch;
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180 rthooks->finish_try_stmt = finish_try_stmt;
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181
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182 rthooks->generate_metadata = objc_generate_v1_gnu_metadata;
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183 return true;
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184 }
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185
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186 static void build_selector_table_decl (void);
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187 static void build_class_template (void);
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188 static void build_category_template (void);
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189 static void build_protocol_template (void);
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190
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191 static GTY(()) tree objc_meta;
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192 static GTY(()) tree meta_base;
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193
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194 static void gnu_runtime_01_initialize (void)
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195 {
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196 tree type, ftype, IMP_type;
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197
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198 /* We do not need to mark GNU ObjC metadata for different sections,
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199 however, we do need to make sure that it is not mistaken for NeXT
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200 metadata. */
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201 objc_meta = get_identifier ("OBJC1METG");
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202 meta_base = get_identifier ("NONE");
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203
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204 /* Declare type of selector-objects that represent an operation name. */
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205 /* `const struct objc_selector *' */
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206 type = xref_tag (RECORD_TYPE, get_identifier (TAG_SELECTOR));
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207 type = build_qualified_type (type, TYPE_QUAL_CONST);
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208 objc_selector_type = build_pointer_type (type);
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209
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210 /* typedef id (*IMP)(id, SEL, ...); */
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211 ftype = build_varargs_function_type_list (objc_object_type,
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212 objc_object_type,
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213 objc_selector_type,
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214 NULL_TREE);
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215
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216 IMP_type = build_pointer_type (ftype);
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217
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218 build_class_template ();
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219 build_super_template ();
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220 build_protocol_template ();
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221 build_category_template ();
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222
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223 /* GNU runtime messenger entry points. */
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224 /* TREE_NOTHROW is cleared for the message-sending functions,
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225 because the function that gets called can throw in Obj-C++, or
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226 could itself call something that can throw even in Obj-C. */
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227
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228 /* IMP objc_msg_lookup (id, SEL); */
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229 type = build_function_type_list (IMP_type,
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230 objc_object_type,
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231 objc_selector_type,
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232 NULL_TREE);
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233
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234 umsg_decl = add_builtin_function (TAG_MSGSEND,
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235 type, 0, NOT_BUILT_IN,
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236 NULL, NULL_TREE);
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237 TREE_NOTHROW (umsg_decl) = 0;
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238
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239 /* IMP objc_msg_lookup_super (struct objc_super *, SEL); */
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240 type = build_function_type_list (IMP_type,
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241 objc_super_type,
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242 objc_selector_type,
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243 NULL_TREE);
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244
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245 umsg_super_decl = add_builtin_function (TAG_MSGSENDSUPER,
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246 type, 0, NOT_BUILT_IN,
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247 NULL, NULL_TREE);
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248 TREE_NOTHROW (umsg_super_decl) = 0;
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249
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250 /* The following GNU runtime entry point is called to initialize
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251 each module:
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252
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253 __objc_exec_class (void *); */
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254 type = build_function_type_list (void_type_node,
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255 ptr_type_node,
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256 NULL_TREE);
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257
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258 execclass_decl = add_builtin_function (TAG_EXECCLASS,
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259 type, 0, NOT_BUILT_IN,
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260 NULL, NULL_TREE);
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261
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262 type = build_function_type_list (objc_object_type,
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263 const_string_type_node,
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264 NULL_TREE);
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265
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266 /* id objc_getClass (const char *); */
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267 objc_get_class_decl
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268 = add_builtin_function (TAG_GETCLASS, type, 0, NOT_BUILT_IN,
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269 NULL, NULL_TREE);
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270
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271 /* id objc_getMetaClass (const char *); */
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272 objc_get_meta_class_decl = add_builtin_function (TAG_GETMETACLASS, type,
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273 0, NOT_BUILT_IN, NULL,
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274 NULL_TREE);
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275
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276 /* static SEL _OBJC_SELECTOR_TABLE[]; */
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277 build_selector_table_decl ();
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278
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279 /* Stuff for properties.
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280 The codegen relies on this being NULL for GNU. */
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281 objc_copyStruct_decl = NULL_TREE;
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282
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283 /* This is the type of all of the following functions
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284 bjc_getPropertyStruct() and objc_setPropertyStruct(). */
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285 type = build_function_type_list (void_type_node,
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286 ptr_type_node,
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287 const_ptr_type_node,
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288 ptrdiff_type_node,
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289 boolean_type_node,
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290 boolean_type_node,
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291 NULL_TREE);
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292
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293 /* Declare the following function:
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294 void
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295 objc_getPropertyStruct (void *destination, const void *source,
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296 ptrdiff_t size, BOOL is_atomic, BOOL has_strong); */
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297 objc_getPropertyStruct_decl = add_builtin_function ("objc_getPropertyStruct",
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298 type, 0, NOT_BUILT_IN,
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299 NULL, NULL_TREE);
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300 TREE_NOTHROW (objc_getPropertyStruct_decl) = 0;
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301 /* Declare the following function:
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302 void
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303 objc_setPropertyStruct (void *destination, const void *source,
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304 ptrdiff_t size, BOOL is_atomic, BOOL has_strong); */
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305 objc_setPropertyStruct_decl = add_builtin_function ("objc_setPropertyStruct",
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306 type, 0, NOT_BUILT_IN,
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307 NULL, NULL_TREE);
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308 TREE_NOTHROW (objc_setPropertyStruct_decl) = 0;
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309
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310 using_eh_for_cleanups ();
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311 lang_hooks.eh_runtime_type = objc_eh_runtime_type;
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312 lang_hooks.eh_personality = objc_eh_personality;
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313 }
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314
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315 /* --- templates --- */
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316 /* struct _objc_selector {
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317 SEL sel_id;
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318 char *sel_type;
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319 }; */
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320
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321 static void
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322 build_selector_template (void)
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323 {
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324 tree decls, *chain = NULL;
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325
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326 objc_selector_template = objc_start_struct (get_identifier (UTAG_SELECTOR));
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327
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328 /* SEL sel_id; */
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329 decls = add_field_decl (objc_selector_type, "sel_id", &chain);
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330
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331 /* char *sel_type; */
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332 add_field_decl (string_type_node, "sel_type", &chain);
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333
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334 objc_finish_struct (objc_selector_template, decls);
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335 }
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336
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337 /* struct _objc_class {
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338 struct _objc_class *isa;
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339 struct _objc_class *super_class;
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340 char *name;
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341 long version;
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342 long info;
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343 long instance_size;
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344 struct _objc_ivar_list *ivars;
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345 struct _objc_method_list *methods;
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346 struct sarray *dtable;
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347 struct _objc_class *subclass_list;
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348 struct _objc_class *sibling_class;
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349 struct _objc_protocol_list *protocols;
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350 void *gc_object_type;
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351 }; */
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352
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353 static void
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354 build_class_template (void)
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355 {
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356 tree ptype, decls, *chain = NULL;
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357
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358 objc_class_template = objc_start_struct (get_identifier (UTAG_CLASS));
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359
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360 /* struct _objc_class *isa; */
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361 decls = add_field_decl (build_pointer_type (objc_class_template),
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362 "isa", &chain);
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363
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364 /* struct _objc_class *super_class; */
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365 add_field_decl (build_pointer_type (objc_class_template),
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366 "super_class", &chain);
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367
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368 /* char *name; */
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|
|
369 add_field_decl (string_type_node, "name", &chain);
|
|
|
370
|
|
|
371 /* long version; */
|
|
|
372 add_field_decl (long_integer_type_node, "version", &chain);
|
|
|
373
|
|
|
374 /* long info; */
|
|
|
375 add_field_decl (long_integer_type_node, "info", &chain);
|
|
|
376
|
|
|
377 /* long instance_size; */
|
|
|
378 add_field_decl (long_integer_type_node, "instance_size", &chain);
|
|
|
379
|
|
|
380 /* struct _objc_ivar_list *ivars; */
|
|
|
381 add_field_decl (objc_ivar_list_ptr,"ivars", &chain);
|
|
|
382
|
|
|
383 /* struct _objc_method_list *methods; */
|
|
|
384 add_field_decl (objc_method_list_ptr, "methods", &chain);
|
|
|
385
|
|
|
386 /* struct sarray *dtable; */
|
|
|
387 ptype = build_pointer_type(xref_tag (RECORD_TYPE,
|
|
|
388 get_identifier ("sarray")));
|
|
|
389 add_field_decl (ptype, "dtable", &chain);
|
|
|
390
|
|
|
391 /* struct objc_class *subclass_list; */
|
|
|
392 ptype = build_pointer_type (objc_class_template);
|
|
|
393 add_field_decl (ptype, "subclass_list", &chain);
|
|
|
394
|
|
|
395 /* struct objc_class *sibling_class; */
|
|
|
396 ptype = build_pointer_type (objc_class_template);
|
|
|
397 add_field_decl (ptype, "sibling_class", &chain);
|
|
|
398
|
|
|
399 /* struct _objc_protocol **protocol_list; */
|
|
|
400 ptype = build_pointer_type (build_pointer_type
|
|
|
401 (xref_tag (RECORD_TYPE,
|
|
|
402 get_identifier (UTAG_PROTOCOL))));
|
|
|
403 add_field_decl (ptype, "protocol_list", &chain);
|
|
|
404
|
|
|
405 /* void *gc_object_type; */
|
|
|
406 add_field_decl (build_pointer_type (void_type_node),
|
|
|
407 "gc_object_type", &chain);
|
|
|
408
|
|
|
409 objc_finish_struct (objc_class_template, decls);
|
|
|
410 }
|
|
|
411
|
|
|
412 /* struct _objc_category {
|
|
|
413 char *category_name;
|
|
|
414 char *class_name;
|
|
|
415 struct _objc_method_list *instance_methods;
|
|
|
416 struct _objc_method_list *class_methods;
|
|
|
417 struct _objc_protocol_list *protocols;
|
|
|
418 }; */
|
|
|
419
|
|
|
420 static void
|
|
|
421 build_category_template (void)
|
|
|
422 {
|
|
|
423 tree ptype, decls, *chain = NULL;
|
|
|
424
|
|
|
425 objc_category_template = objc_start_struct (get_identifier (UTAG_CATEGORY));
|
|
|
426
|
|
|
427 /* char *category_name; */
|
|
|
428 decls = add_field_decl (string_type_node, "category_name", &chain);
|
|
|
429
|
|
|
430 /* char *class_name; */
|
|
|
431 add_field_decl (string_type_node, "class_name", &chain);
|
|
|
432
|
|
|
433 /* struct _objc_method_list *instance_methods; */
|
|
|
434 add_field_decl (objc_method_list_ptr, "instance_methods", &chain);
|
|
|
435
|
|
|
436 /* struct _objc_method_list *class_methods; */
|
|
|
437 add_field_decl (objc_method_list_ptr, "class_methods", &chain);
|
|
|
438
|
|
|
439 /* struct _objc_protocol **protocol_list; */
|
|
|
440 ptype = build_pointer_type (build_pointer_type (objc_protocol_template));
|
|
|
441 add_field_decl (ptype, "protocol_list", &chain);
|
|
|
442
|
|
|
443 objc_finish_struct (objc_category_template, decls);
|
|
|
444 }
|
|
|
445
|
|
|
446 /* struct _objc_protocol {
|
|
|
447 struct _objc_class *isa;
|
|
|
448 char *protocol_name;
|
|
|
449 struct _objc_protocol **protocol_list;
|
|
|
450 struct _objc__method_prototype_list *instance_methods;
|
|
|
451 struct _objc__method_prototype_list *class_methods;
|
|
|
452 }; */
|
|
|
453
|
|
|
454 static void
|
|
|
455 build_protocol_template (void)
|
|
|
456 {
|
|
|
457 tree ptype, decls, *chain = NULL;
|
|
|
458
|
|
|
459 objc_protocol_template = objc_start_struct (get_identifier (UTAG_PROTOCOL));
|
|
|
460
|
|
|
461 /* struct _objc_class *isa; */
|
|
|
462 ptype = build_pointer_type (xref_tag (RECORD_TYPE,
|
|
|
463 get_identifier (UTAG_CLASS)));
|
|
|
464 decls = add_field_decl (ptype, "isa", &chain);
|
|
|
465
|
|
|
466 /* char *protocol_name; */
|
|
|
467 add_field_decl (string_type_node, "protocol_name", &chain);
|
|
|
468
|
|
|
469 /* struct _objc_protocol **protocol_list; */
|
|
|
470 ptype = build_pointer_type (build_pointer_type (objc_protocol_template));
|
|
|
471 add_field_decl (ptype, "protocol_list", &chain);
|
|
|
472
|
|
|
473 /* struct _objc__method_prototype_list *instance_methods; */
|
|
|
474 add_field_decl (objc_method_proto_list_ptr, "instance_methods", &chain);
|
|
|
475
|
|
|
476 /* struct _objc__method_prototype_list *class_methods; */
|
|
|
477 add_field_decl (objc_method_proto_list_ptr, "class_methods", &chain);
|
|
|
478
|
|
|
479 objc_finish_struct (objc_protocol_template, decls);
|
|
|
480 }
|
|
|
481
|
|
|
482 /* --- names, decls + identifiers --- */
|
|
|
483
|
|
|
484 static void
|
|
|
485 build_selector_table_decl (void)
|
|
|
486 {
|
|
|
487 tree temp;
|
|
|
488
|
|
|
489 build_selector_template ();
|
|
|
490 temp = build_array_type (objc_selector_template, NULL_TREE);
|
|
|
491
|
|
|
492 UOBJC_SELECTOR_TABLE_decl = start_var_decl (temp, "_OBJC_SELECTOR_TABLE");
|
|
|
493 /* Squash `defined but not used' warning check_global_declaration. */
|
|
|
494 TREE_USED (UOBJC_SELECTOR_TABLE_decl) = 1;
|
|
|
495 OBJCMETA (UOBJC_SELECTOR_TABLE_decl, objc_meta, meta_base);
|
|
|
496 }
|
|
|
497
|
|
|
498
|
|
|
499 static tree
|
|
|
500 gnu_runtime_abi_01_super_superclassfield_id (void)
|
|
|
501 {
|
|
|
502 if (!super_superclassfield_id)
|
|
|
503 super_superclassfield_id = get_identifier ("super_class");
|
|
|
504 return super_superclassfield_id;
|
|
|
505 }
|
|
|
506
|
|
|
507
|
|
|
508 static tree
|
|
|
509 gnu_runtime_abi_01_class_decl (tree klass)
|
|
|
510 {
|
|
|
511 tree decl;
|
|
|
512 char buf[BUFSIZE];
|
|
|
513 snprintf (buf, BUFSIZE, "_OBJC_Class_%s",
|
|
|
514 IDENTIFIER_POINTER (CLASS_NAME (klass)));
|
|
|
515 decl = start_var_decl (objc_class_template, buf);
|
|
|
516 OBJCMETA (decl, objc_meta, meta_base);
|
|
|
517 return decl;
|
|
|
518 }
|
|
|
519
|
|
|
520 static tree
|
|
|
521 gnu_runtime_abi_01_metaclass_decl (tree klass)
|
|
|
522 {
|
|
|
523 tree decl;
|
|
|
524 char buf[BUFSIZE];
|
|
|
525 snprintf (buf, BUFSIZE, "_OBJC_MetaClass_%s",
|
|
|
526 IDENTIFIER_POINTER (CLASS_NAME (klass)));
|
|
|
527 decl = start_var_decl (objc_class_template, buf);
|
|
|
528 OBJCMETA (decl, objc_meta, meta_base);
|
|
|
529 return decl;
|
|
|
530 }
|
|
|
531
|
|
|
532 static tree
|
|
|
533 gnu_runtime_abi_01_category_decl (tree klass)
|
|
|
534 {
|
|
|
535 tree decl;
|
|
|
536 char buf[BUFSIZE];
|
|
|
537 snprintf (buf, BUFSIZE, "_OBJC_Category_%s_on_%s",
|
|
|
538 IDENTIFIER_POINTER (CLASS_SUPER_NAME (klass)),
|
|
|
539 IDENTIFIER_POINTER (CLASS_NAME (klass)));
|
|
|
540 decl = start_var_decl (objc_category_template, buf);
|
|
|
541 OBJCMETA (decl, objc_meta, meta_base);
|
|
|
542 return decl;
|
|
|
543 }
|
|
|
544
|
|
|
545 static tree
|
|
|
546 gnu_runtime_abi_01_protocol_decl (tree p)
|
|
|
547 {
|
|
|
548 tree decl;
|
|
|
549 char buf[BUFSIZE];
|
|
|
550
|
|
|
551 /* static struct _objc_protocol _OBJC_Protocol_<mumble>; */
|
|
|
552 snprintf (buf, BUFSIZE, "_OBJC_Protocol_%s",
|
|
|
553 IDENTIFIER_POINTER (PROTOCOL_NAME (p)));
|
|
|
554 decl = start_var_decl (objc_protocol_template, buf);
|
|
|
555 OBJCMETA (decl, objc_meta, meta_base);
|
|
|
556 return decl;
|
|
|
557 }
|
|
|
558
|
|
|
559 static tree
|
|
|
560 gnu_runtime_abi_01_string_decl (tree type, const char *name,
|
|
|
561 string_section where ATTRIBUTE_UNUSED)
|
|
|
562 {
|
|
|
563 tree decl = start_var_decl (type, name);
|
|
|
564 OBJCMETA (decl, objc_meta, meta_base);
|
|
|
565 return decl;
|
|
|
566 }
|
|
|
567
|
|
|
568 /* --- entry --- */
|
|
|
569
|
|
|
570 static tree
|
|
|
571 gnu_runtime_abi_01_get_class_reference (tree ident)
|
|
|
572 {
|
|
|
573 tree params;
|
|
|
574
|
|
|
575 add_class_reference (ident);
|
|
|
576
|
|
|
577 params = build_tree_list (NULL_TREE, my_build_string_pointer
|
|
|
578 (IDENTIFIER_LENGTH (ident) + 1,
|
|
|
579 IDENTIFIER_POINTER (ident)));
|
|
|
580
|
|
|
581 return build_function_call (input_location, objc_get_class_decl, params);
|
|
|
582 }
|
|
|
583
|
|
|
584 /* Used by build_function_type_for_method. Append the types for
|
|
|
585 receiver & _cmd at the start of a method argument list to ARGTYPES.
|
|
|
586 CONTEXT is either METHOD_DEF or METHOD_REF, saying whether we are
|
|
|
587 trying to define a method or call one. SUPERFLAG says this is for a
|
|
|
588 send to super. METH may be NULL, in the case that there is no
|
|
|
589 prototype. */
|
|
|
590
|
|
|
591 static void
|
|
|
592 gnu_runtime_abi_01_get_arg_type_list_base (vec<tree, va_gc> **argtypes,
|
|
|
593 tree meth, int context,
|
|
|
594 int superflag ATTRIBUTE_UNUSED)
|
|
|
595 {
|
|
|
596 tree receiver_type;
|
|
|
597
|
|
|
598 if (context == METHOD_DEF && TREE_CODE (meth) == INSTANCE_METHOD_DECL)
|
|
|
599 receiver_type = objc_instance_type;
|
|
|
600 else
|
|
|
601 receiver_type = objc_object_type;
|
|
|
602
|
|
|
603 vec_safe_push (*argtypes, receiver_type);
|
|
|
604 /* Selector type - will eventually change to `int'. */
|
|
|
605 vec_safe_push (*argtypes, objc_selector_type);
|
|
|
606 }
|
|
|
607
|
|
|
608 /* Unused for GNU runtime. */
|
|
|
609 static tree
|
|
|
610 gnu_runtime_abi_01_receiver_is_class_object (tree a ATTRIBUTE_UNUSED)
|
|
|
611 {
|
|
|
612 return NULL_TREE;
|
|
|
613 }
|
|
|
614
|
|
|
615 /* sel_ref_chain is a list whose "value" fields will be instances of
|
|
|
616 identifier_node that represent the selector. LOC is the location of
|
|
|
617 the @selector. */
|
|
|
618
|
|
|
619 static tree
|
|
|
620 gnu_runtime_abi_01_build_typed_selector_reference (location_t loc, tree ident,
|
|
|
621 tree prototype)
|
|
|
622 {
|
|
|
623 tree *chain = &sel_ref_chain;
|
|
|
624 tree expr;
|
|
|
625 int index = 0;
|
|
|
626
|
|
|
627 while (*chain)
|
|
|
628 {
|
|
|
629 /* When we do a lookup for @selector () we have no idea of the
|
|
|
630 prototype - so match the first we find. */
|
|
|
631 if (TREE_VALUE (*chain) == ident
|
|
|
632 && (!prototype || TREE_PURPOSE (*chain) == prototype))
|
|
|
633 goto return_at_index;
|
|
|
634
|
|
|
635 index++;
|
|
|
636 chain = &TREE_CHAIN (*chain);
|
|
|
637 }
|
|
|
638
|
|
|
639 *chain = tree_cons (prototype, ident, NULL_TREE);
|
|
|
640
|
|
|
641 /* TODO: Use a vec and keep this in it to (a) avoid re-creating and
|
|
|
642 (b) provide better diagnostics for the first time an undefined
|
|
|
643 selector is used. */
|
|
|
644 return_at_index:
|
|
|
645 expr = build_unary_op (loc, ADDR_EXPR,
|
|
|
646 build_array_ref (loc, UOBJC_SELECTOR_TABLE_decl,
|
|
|
647 build_int_cst (NULL_TREE, index)),
|
|
|
648 1);
|
|
|
649 return convert (objc_selector_type, expr);
|
|
|
650 }
|
|
|
651
|
|
|
652 /* Build a tree expression to send OBJECT the operation SELECTOR,
|
|
|
653 looking up the method on object LOOKUP_OBJECT (often same as OBJECT),
|
|
|
654 assuming the method has prototype METHOD_PROTOTYPE.
|
|
|
655 (That is an INSTANCE_METHOD_DECL or CLASS_METHOD_DECL.)
|
|
|
656 LOC is the location of the expression to build.
|
|
|
657 Use METHOD_PARAMS as list of args to pass to the method.
|
|
|
658 If SUPER_FLAG is nonzero, we look up the superclass's method. */
|
|
|
659
|
|
|
660 static tree
|
|
|
661 build_objc_method_call (location_t loc, int super_flag, tree method_prototype,
|
|
|
662 tree lookup_object, tree selector,
|
|
|
663 tree method_params)
|
|
|
664 {
|
|
|
665 tree sender = (super_flag ? umsg_super_decl
|
|
|
666 : (flag_objc_direct_dispatch ? umsg_fast_decl
|
|
|
667 : umsg_decl));
|
|
|
668 tree rcv_p = (super_flag ? objc_super_type : objc_object_type);
|
|
|
669 vec<tree, va_gc> *parms;
|
|
|
670 vec<tree, va_gc> *tv;
|
|
|
671 unsigned nparm = (method_params ? list_length (method_params) : 0);
|
|
|
672
|
|
|
673 /* If a prototype for the method to be called exists, then cast
|
|
|
674 the sender's return type and arguments to match that of the method.
|
|
|
675 Otherwise, leave sender as is. */
|
|
|
676 tree ret_type
|
|
|
677 = (method_prototype
|
|
|
678 ? TREE_VALUE (TREE_TYPE (method_prototype))
|
|
|
679 : objc_object_type);
|
|
|
680 tree ftype
|
|
|
681 = build_function_type_for_method (ret_type, method_prototype,
|
|
|
682 METHOD_REF, super_flag);
|
|
|
683 tree sender_cast;
|
|
|
684 tree method, t;
|
|
|
685
|
|
|
686 if (method_prototype && METHOD_TYPE_ATTRIBUTES (method_prototype))
|
|
|
687 ftype = build_type_attribute_variant (ftype,
|
|
|
688 METHOD_TYPE_ATTRIBUTES
|
|
|
689 (method_prototype));
|
|
|
690
|
|
|
691 sender_cast = build_pointer_type (ftype);
|
|
|
692
|
|
|
693 lookup_object = build_c_cast (loc, rcv_p, lookup_object);
|
|
|
694
|
|
|
695 /* Use SAVE_EXPR to avoid evaluating the receiver twice. */
|
|
|
696 lookup_object = save_expr (lookup_object);
|
|
|
697
|
|
|
698 /* Param list + 2 slots for object and selector. */
|
|
|
699 vec_alloc (parms, nparm + 2);
|
|
|
700 vec_alloc (tv, 2);
|
|
|
701
|
|
|
702 /* First, call the lookup function to get a pointer to the method,
|
|
|
703 then cast the pointer, then call it with the method arguments. */
|
|
|
704 tv->quick_push (lookup_object);
|
|
|
705 tv->quick_push (selector);
|
|
|
706 method = build_function_call_vec (loc, vNULL, sender, tv, NULL);
|
|
|
707 vec_free (tv);
|
|
|
708
|
|
|
709 /* Pass the appropriate object to the method. */
|
|
|
710 parms->quick_push ((super_flag ? self_decl : lookup_object));
|
|
|
711
|
|
|
712 /* Pass the selector to the method. */
|
|
|
713 parms->quick_push (selector);
|
|
|
714 /* Now append the remainder of the parms. */
|
|
|
715 if (nparm)
|
|
|
716 for (; method_params; method_params = TREE_CHAIN (method_params))
|
|
|
717 parms->quick_push (TREE_VALUE (method_params));
|
|
|
718
|
|
|
719 /* Build an obj_type_ref, with the correct cast for the method call. */
|
|
|
720 t = build3 (OBJ_TYPE_REF, sender_cast, method, lookup_object, size_zero_node);
|
|
|
721 t = build_function_call_vec (loc, vNULL, t, parms, NULL);
|
|
|
722 vec_free (parms);
|
|
|
723 return t;
|
|
|
724 }
|
|
|
725
|
|
|
726 static tree
|
|
|
727 gnu_runtime_abi_01_build_objc_method_call (location_t loc,
|
|
|
728 tree method_prototype,
|
|
|
729 tree receiver,
|
|
|
730 tree rtype ATTRIBUTE_UNUSED,
|
|
|
731 tree sel_name,
|
|
|
732 tree method_params,
|
|
|
733 int super ATTRIBUTE_UNUSED)
|
|
|
734 {
|
|
|
735 tree selector =
|
|
|
736 gnu_runtime_abi_01_build_typed_selector_reference (loc,
|
|
|
737 sel_name,
|
|
|
738 method_prototype);
|
|
|
739
|
|
|
740 return build_objc_method_call (loc, super, method_prototype, receiver,
|
|
|
741 selector, method_params);
|
|
|
742 }
|
|
|
743
|
|
|
744 static tree
|
|
|
745 gnu_runtime_abi_01_get_protocol_reference (location_t loc, tree p)
|
|
|
746 {
|
|
|
747 tree expr, protocol_struct_type, *chain;
|
|
|
748 if (!PROTOCOL_FORWARD_DECL (p))
|
|
|
749 PROTOCOL_FORWARD_DECL (p) = gnu_runtime_abi_01_protocol_decl (p);
|
|
|
750
|
|
|
751 expr = build_unary_op (loc, ADDR_EXPR, PROTOCOL_FORWARD_DECL (p), 0);
|
|
|
752
|
|
|
753 /* ??? Ideally we'd build the reference with objc_protocol_type directly,
|
|
|
754 if we have it, rather than converting it here. */
|
|
|
755 expr = convert (objc_protocol_type, expr);
|
|
|
756
|
|
|
757 /* The @protocol() expression is being compiled into a pointer to a
|
|
|
758 statically allocated instance of the Protocol class. To become
|
|
|
759 usable at runtime, the 'isa' pointer of the instance need to be
|
|
|
760 fixed up at runtime by the runtime library, to point to the
|
|
|
761 actual 'Protocol' class. */
|
|
|
762
|
|
|
763 /* For the GNU runtime, put the static Protocol instance in the list
|
|
|
764 of statically allocated instances, so that we make sure that its
|
|
|
765 'isa' pointer is fixed up at runtime by the GNU runtime library
|
|
|
766 to point to the Protocol class (at runtime, when loading the
|
|
|
767 module, the GNU runtime library loops on the statically allocated
|
|
|
768 instances (as found in the defs field in objc_symtab) and fixups
|
|
|
769 all the 'isa' pointers of those objects). */
|
|
|
770
|
|
|
771 /* This type is a struct containing the fields of a Protocol
|
|
|
772 object. (Cfr. objc_protocol_type instead is the type of a pointer
|
|
|
773 to such a struct). */
|
|
|
774 protocol_struct_type = xref_tag (RECORD_TYPE,
|
|
|
775 get_identifier (PROTOCOL_OBJECT_CLASS_NAME));
|
|
|
776
|
|
|
777 /* Look for the list of Protocol statically allocated instances
|
|
|
778 to fixup at runtime. Create a new list to hold Protocol
|
|
|
779 statically allocated instances, if the list is not found. At
|
|
|
780 present there is only another list, holding NSConstantString
|
|
|
781 static instances to be fixed up at runtime. */
|
|
|
782
|
|
|
783 for (chain = &objc_static_instances;
|
|
|
784 *chain && TREE_VALUE (*chain) != protocol_struct_type;
|
|
|
785 chain = &TREE_CHAIN (*chain));
|
|
|
786
|
|
|
787 if (!*chain)
|
|
|
788 {
|
|
|
789 *chain = tree_cons (NULL_TREE, protocol_struct_type, NULL_TREE);
|
|
|
790 add_objc_string (OBJC_TYPE_NAME (protocol_struct_type),
|
|
|
791 class_names);
|
|
|
792 }
|
|
|
793
|
|
|
794 /* Add this statically allocated instance to the Protocol list. */
|
|
|
795 TREE_PURPOSE (*chain) = tree_cons (NULL_TREE,
|
|
|
796 PROTOCOL_FORWARD_DECL (p),
|
|
|
797 TREE_PURPOSE (*chain));
|
|
|
798 return expr;
|
|
|
799 }
|
|
|
800
|
|
|
801 /* For ABI 8 an IVAR is just a fixed offset in the class struct. */
|
|
|
802
|
|
|
803 static tree
|
|
|
804 gnu_runtime_abi_01_build_ivar_ref (location_t loc ATTRIBUTE_UNUSED,
|
|
|
805 tree base, tree id)
|
|
|
806 {
|
|
|
807 return objc_build_component_ref (base, id);
|
|
|
808 }
|
|
|
809
|
|
|
810 /* We build super class references as we need them (but keep them once
|
|
|
811 built for the sake of efficiency). */
|
|
|
812
|
|
|
813 static tree
|
|
|
814 gnu_runtime_abi_01_get_class_super_ref (location_t loc ATTRIBUTE_UNUSED,
|
|
|
815 struct imp_entry *imp, bool inst_meth)
|
|
|
816 {
|
|
|
817 if (inst_meth)
|
|
|
818 {
|
|
|
819 if (!ucls_super_ref)
|
|
|
820 ucls_super_ref =
|
|
|
821 objc_build_component_ref (imp->class_decl,
|
|
|
822 get_identifier ("super_class"));
|
|
|
823 return ucls_super_ref;
|
|
|
824 }
|
|
|
825 else
|
|
|
826 {
|
|
|
827 if (!uucls_super_ref)
|
|
|
828 uucls_super_ref =
|
|
|
829 objc_build_component_ref (imp->meta_decl,
|
|
|
830 get_identifier ("super_class"));
|
|
|
831 return uucls_super_ref;
|
|
|
832 }
|
|
|
833 }
|
|
|
834
|
|
|
835 static tree
|
|
|
836 gnu_runtime_abi_01_get_category_super_ref (location_t loc ATTRIBUTE_UNUSED,
|
|
|
837 struct imp_entry *imp, bool inst_meth)
|
|
|
838 {
|
|
|
839 tree super_name = CLASS_SUPER_NAME (imp->imp_template);
|
|
|
840 tree super_class;
|
|
|
841
|
|
|
842 add_class_reference (super_name);
|
|
|
843 super_class = (inst_meth ? objc_get_class_decl : objc_get_meta_class_decl);
|
|
|
844 super_name = my_build_string_pointer (IDENTIFIER_LENGTH (super_name) + 1,
|
|
|
845 IDENTIFIER_POINTER (super_name));
|
|
|
846 /* super_class = get_{meta_}class("CLASS_SUPER_NAME"); */
|
|
|
847 return build_function_call (input_location,
|
|
|
848 super_class,
|
|
|
849 build_tree_list (NULL_TREE, super_name));
|
|
|
850 }
|
|
|
851
|
|
|
852 static bool
|
|
|
853 gnu_runtime_abi_01_setup_const_string_class_decl (void)
|
|
|
854 {
|
|
|
855 /* Do nothing, and create no error. */
|
|
|
856 return true;
|
|
|
857 }
|
|
|
858
|
|
|
859 /* Declare a static instance of CLASS_DECL initialized by CONSTRUCTOR. */
|
|
|
860
|
|
|
861 static GTY(()) int num_static_inst;
|
|
|
862
|
|
|
863 static tree
|
|
|
864 objc_add_static_instance (tree constructor, tree class_decl)
|
|
|
865 {
|
|
|
866 tree *chain, decl;
|
|
|
867 char buf[BUFSIZE];
|
|
|
868
|
|
|
869 /* Find the list of static instances for the CLASS_DECL. Create one if
|
|
|
870 not found. */
|
|
|
871 for (chain = &objc_static_instances;
|
|
|
872 *chain && TREE_VALUE (*chain) != class_decl;
|
|
|
873 chain = &TREE_CHAIN (*chain));
|
|
|
874 if (!*chain)
|
|
|
875 {
|
|
|
876 *chain = tree_cons (NULL_TREE, class_decl, NULL_TREE);
|
|
|
877 add_objc_string (OBJC_TYPE_NAME (class_decl), class_names);
|
|
|
878 }
|
|
|
879
|
|
|
880 snprintf (buf, BUFSIZE, "_OBJC_INSTANCE_%d", num_static_inst++);
|
|
|
881 decl = build_decl (input_location,
|
|
|
882 VAR_DECL, get_identifier (buf), class_decl);
|
|
|
883 TREE_STATIC (decl) = 1;
|
|
|
884 DECL_ARTIFICIAL (decl) = 1;
|
|
|
885 TREE_USED (decl) = 1;
|
|
|
886 DECL_INITIAL (decl) = constructor;
|
|
|
887 DECL_CONTEXT (decl) = NULL;
|
|
|
888 OBJCMETA (decl, objc_meta, meta_base);
|
|
|
889
|
|
|
890 /* We may be writing something else just now.
|
|
|
891 Postpone till end of input. */
|
|
|
892 DECL_DEFER_OUTPUT (decl) = 1;
|
|
|
893 lang_hooks.decls.pushdecl (decl);
|
|
|
894 rest_of_decl_compilation (decl, 1, 0);
|
|
|
895
|
|
|
896 /* Add the DECL to the head of this CLASS' list. */
|
|
|
897 TREE_PURPOSE (*chain) = tree_cons (NULL_TREE, decl, TREE_PURPOSE (*chain));
|
|
|
898
|
|
|
899 return decl;
|
|
|
900 }
|
|
|
901
|
|
|
902 static tree
|
|
|
903 gnu_runtime_abi_01_build_const_string_constructor (location_t loc, tree string,
|
|
|
904 int length)
|
|
|
905 {
|
|
|
906 tree constructor, fields;
|
|
|
907 vec<constructor_elt, va_gc> *v = NULL;
|
|
|
908
|
|
|
909 /* GNU: (NXConstantString *) & ((__builtin_ObjCString) { NULL, string, length }) */
|
|
|
910 fields = TYPE_FIELDS (internal_const_str_type);
|
|
|
911 CONSTRUCTOR_APPEND_ELT (v, fields, build_int_cst (NULL_TREE, 0));
|
|
|
912
|
|
|
913 fields = DECL_CHAIN (fields);
|
|
|
914 CONSTRUCTOR_APPEND_ELT (v, fields, build_unary_op (loc,
|
|
|
915 ADDR_EXPR, string, 1));
|
|
|
916
|
|
|
917 fields = DECL_CHAIN (fields);
|
|
|
918 CONSTRUCTOR_APPEND_ELT (v, fields, build_int_cst (NULL_TREE, length));
|
|
|
919 constructor = objc_build_constructor (internal_const_str_type, v);
|
|
|
920
|
|
|
921 constructor = objc_add_static_instance (constructor, constant_string_type);
|
|
|
922 return constructor;
|
|
|
923 }
|
|
|
924
|
|
|
925 /* --- metadata - module initializer --- */
|
|
|
926
|
|
|
927 /* The GNU runtime requires us to provide a static initializer function
|
|
|
928 for each module:
|
|
|
929
|
|
|
930 static void __objc_gnu_init (void) {
|
|
|
931 __objc_exec_class (&L_OBJC_MODULES);
|
|
|
932 } */
|
|
|
933
|
|
|
934
|
|
|
935 static void
|
|
|
936 build_module_initializer_routine (void)
|
|
|
937 {
|
|
|
938 tree body;
|
|
|
939
|
|
|
940 #ifdef OBJCPLUS
|
|
|
941 push_lang_context (lang_name_c); /* extern "C" */
|
|
|
942 #endif
|
|
|
943
|
|
|
944 objc_push_parm (build_decl (input_location,
|
|
|
945 PARM_DECL, NULL_TREE, void_type_node));
|
|
|
946 #ifdef OBJCPLUS
|
|
|
947 objc_start_function (get_identifier (TAG_GNUINIT),
|
|
|
948 build_function_type_list (void_type_node, NULL_TREE),
|
|
|
949 NULL_TREE, NULL_TREE);
|
|
|
950 #else
|
|
|
951 objc_start_function (get_identifier (TAG_GNUINIT),
|
|
|
952 build_function_type_list (void_type_node, NULL_TREE),
|
|
|
953 NULL_TREE, objc_get_parm_info (0, NULL_TREE));
|
|
|
954 #endif
|
|
|
955 body = c_begin_compound_stmt (true);
|
|
|
956 add_stmt (build_function_call
|
|
|
957 (input_location,
|
|
|
958 execclass_decl,
|
|
|
959 build_tree_list
|
|
|
960 (NULL_TREE,
|
|
|
961 build_unary_op (input_location, ADDR_EXPR,
|
|
|
962 UOBJC_MODULES_decl, 0))));
|
|
|
963 add_stmt (c_end_compound_stmt (input_location, body, true));
|
|
|
964
|
|
|
965 TREE_PUBLIC (current_function_decl) = 0;
|
|
|
966
|
|
|
967 #ifndef OBJCPLUS
|
|
|
968 /* For Objective-C++, we will need to call __objc_gnu_init
|
|
|
969 from objc_generate_static_init_call() below. */
|
|
|
970 DECL_STATIC_CONSTRUCTOR (current_function_decl) = 1;
|
|
|
971 #endif
|
|
|
972
|
|
|
973 GNU_INIT_decl = current_function_decl;
|
|
|
974 finish_function ();
|
|
|
975
|
|
|
976 #ifdef OBJCPLUS
|
|
|
977 pop_lang_context ();
|
|
|
978 #endif
|
|
|
979 }
|
|
|
980
|
|
|
981 #ifdef OBJCPLUS
|
|
|
982 /* Return 1 if the __objc_gnu_init function has been synthesized and needs
|
|
|
983 to be called by the module initializer routine. */
|
|
|
984
|
|
|
985 int
|
|
|
986 objc_static_init_needed_p (void)
|
|
|
987 {
|
|
|
988 return (GNU_INIT_decl != NULL_TREE);
|
|
|
989 }
|
|
|
990
|
|
|
991 /* Generate a call to the __objc_gnu_init initializer function. */
|
|
|
992
|
|
|
993 tree
|
|
|
994 objc_generate_static_init_call (tree ctors ATTRIBUTE_UNUSED)
|
|
|
995 {
|
|
|
996 add_stmt (build_stmt (input_location, EXPR_STMT,
|
|
|
997 build_function_call (input_location,
|
|
|
998 GNU_INIT_decl, NULL_TREE)));
|
|
|
999
|
|
|
1000 return ctors;
|
|
|
1001 }
|
|
|
1002 #endif /* OBJCPLUS */
|
|
|
1003
|
|
|
1004 /* --- Output GNU Meta-data --- */
|
|
|
1005
|
|
|
1006 static void
|
|
|
1007 generate_classref_translation_entry (tree chain)
|
|
|
1008 {
|
|
|
1009 tree expr, decl, type;
|
|
|
1010
|
|
|
1011 decl = TREE_PURPOSE (chain);
|
|
|
1012 type = TREE_TYPE (decl);
|
|
|
1013
|
|
|
1014 expr = add_objc_string (TREE_VALUE (chain), class_names);
|
|
|
1015 expr = convert (type, expr); /* cast! */
|
|
|
1016
|
|
|
1017 /* This is a class reference. It is re-written by the runtime,
|
|
|
1018 but will be optimized away unless we force it. */
|
|
|
1019 DECL_PRESERVE_P (decl) = 1;
|
|
|
1020 OBJCMETA (decl, objc_meta, meta_base);
|
|
|
1021 finish_var_decl (decl, expr);
|
|
|
1022 return;
|
|
|
1023 }
|
|
|
1024
|
|
|
1025
|
|
|
1026 static void
|
|
|
1027 handle_impent (struct imp_entry *impent)
|
|
|
1028 {
|
|
|
1029 char *string;
|
|
|
1030
|
|
|
1031 /* objc_implementation_context = impent->imp_context;
|
|
|
1032 implementation_template = impent->imp_template;*/
|
|
|
1033
|
|
|
1034 switch (TREE_CODE (impent->imp_context))
|
|
|
1035 {
|
|
|
1036 case CLASS_IMPLEMENTATION_TYPE:
|
|
|
1037 {
|
|
|
1038 const char *const class_name =
|
|
|
1039 IDENTIFIER_POINTER (CLASS_NAME (impent->imp_context));
|
|
|
1040
|
|
|
1041 string = (char *) alloca (strlen (class_name) + 30);
|
|
|
1042
|
|
|
1043 sprintf (string, "__objc_class_name_%s", class_name);
|
|
|
1044 break;
|
|
|
1045 }
|
|
|
1046 case CATEGORY_IMPLEMENTATION_TYPE:
|
|
|
1047 {
|
|
|
1048 const char *const class_name =
|
|
|
1049 IDENTIFIER_POINTER (CLASS_NAME (impent->imp_context));
|
|
|
1050 const char *const class_super_name =
|
|
|
1051 IDENTIFIER_POINTER (CLASS_SUPER_NAME (impent->imp_context));
|
|
|
1052
|
|
|
1053 string = (char *) alloca (strlen (class_name)
|
|
|
1054 + strlen (class_super_name) + 30);
|
|
|
1055
|
|
|
1056 /* Do the same for categories. Even though no references to
|
|
|
1057 these symbols are generated automatically by the compiler,
|
|
|
1058 it gives you a handle to pull them into an archive by
|
|
|
1059 hand. */
|
|
|
1060 sprintf (string, "*__objc_category_name_%s_%s", class_name, class_super_name);
|
|
|
1061 break;
|
|
|
1062 }
|
|
|
1063 default:
|
|
|
1064 return;
|
|
|
1065 }
|
|
|
1066
|
|
|
1067 {
|
|
|
1068 tree decl, init;
|
|
|
1069
|
|
|
1070 init = integer_zero_node;
|
|
|
1071 decl = build_decl (input_location,
|
|
|
1072 VAR_DECL, get_identifier (string), TREE_TYPE (init));
|
|
|
1073 TREE_PUBLIC (decl) = 1;
|
|
|
1074 TREE_READONLY (decl) = 1;
|
|
|
1075 TREE_USED (decl) = 1;
|
|
|
1076 TREE_CONSTANT (decl) = 1;
|
|
|
1077 DECL_CONTEXT (decl) = NULL_TREE;
|
|
|
1078 DECL_ARTIFICIAL (decl) = 1;
|
|
|
1079 TREE_STATIC (decl) = 1;
|
|
|
1080 DECL_INITIAL (decl) = error_mark_node; /* A real initializer is coming... */
|
|
|
1081 /* We must force the reference. */
|
|
|
1082 DECL_PRESERVE_P (decl) = 1;
|
|
|
1083
|
|
|
1084 finish_var_decl(decl, init) ;
|
|
|
1085 }
|
|
|
1086 }
|
|
|
1087
|
|
|
1088 tree
|
|
|
1089 build_protocol_initializer (tree type, tree protocol_name, tree protocol_list,
|
|
|
1090 tree inst_methods, tree class_methods)
|
|
|
1091 {
|
|
|
1092 tree expr, ttyp;
|
|
|
1093 location_t loc;
|
|
|
1094 vec<constructor_elt, va_gc> *inits = NULL;
|
|
|
1095
|
|
|
1096 /* TODO: pass the loc in or find it from args. */
|
|
|
1097 loc = input_location;
|
|
|
1098 ttyp = build_pointer_type (xref_tag (RECORD_TYPE,
|
|
|
1099 get_identifier (UTAG_CLASS)));
|
|
|
1100 /* Filling the "isa" in with a version allows the runtime system to
|
|
|
1101 detect this ... */
|
|
|
1102 expr = build_int_cst (ttyp, PROTOCOL_VERSION);
|
|
|
1103
|
|
|
1104 CONSTRUCTOR_APPEND_ELT (inits, NULL_TREE, expr);
|
|
|
1105
|
|
|
1106 CONSTRUCTOR_APPEND_ELT (inits, NULL_TREE, protocol_name);
|
|
|
1107 CONSTRUCTOR_APPEND_ELT (inits, NULL_TREE, protocol_list);
|
|
|
1108
|
|
|
1109 ttyp = objc_method_proto_list_ptr;
|
|
|
1110 if (inst_methods)
|
|
|
1111 expr = convert (ttyp, build_unary_op (loc, ADDR_EXPR, inst_methods, 0));
|
|
|
1112 else
|
|
|
1113 expr = convert (ttyp, null_pointer_node);
|
|
|
1114 CONSTRUCTOR_APPEND_ELT (inits, NULL_TREE, expr);
|
|
|
1115
|
|
|
1116 if (class_methods)
|
|
|
1117 expr = convert (ttyp, build_unary_op (loc, ADDR_EXPR, class_methods, 0));
|
|
|
1118 else
|
|
|
1119 expr = convert (ttyp, null_pointer_node);
|
|
|
1120 CONSTRUCTOR_APPEND_ELT (inits, NULL_TREE, expr);
|
|
|
1121
|
|
|
1122 return objc_build_constructor (type, inits);
|
|
|
1123 }
|
|
|
1124
|
|
|
1125 static tree
|
|
|
1126 generate_protocol_list (tree i_or_p, tree klass_ctxt)
|
|
|
1127 {
|
|
|
1128 tree array_type, ptype, refs_decl, lproto, e, plist;
|
|
|
1129 vec<constructor_elt, va_gc> *v = NULL;
|
|
|
1130 char buf[BUFSIZE];
|
|
|
1131 int size = 0;
|
|
|
1132
|
|
|
1133 switch (TREE_CODE (i_or_p))
|
|
|
1134 {
|
|
|
1135 case CLASS_INTERFACE_TYPE:
|
|
|
1136 case CATEGORY_INTERFACE_TYPE:
|
|
|
1137 plist = CLASS_PROTOCOL_LIST (i_or_p);
|
|
|
1138 break;
|
|
|
1139 case PROTOCOL_INTERFACE_TYPE:
|
|
|
1140 plist = PROTOCOL_LIST (i_or_p);
|
|
|
1141 break;
|
|
|
1142 default:
|
|
|
1143 gcc_unreachable ();
|
|
|
1144 }
|
|
|
1145
|
|
|
1146 /* Compute size. */
|
|
|
1147 for (lproto = plist; lproto; lproto = TREE_CHAIN (lproto))
|
|
|
1148 if (TREE_CODE (TREE_VALUE (lproto)) == PROTOCOL_INTERFACE_TYPE
|
|
|
1149 && PROTOCOL_FORWARD_DECL (TREE_VALUE (lproto)))
|
|
|
1150 size++;
|
|
|
1151
|
|
|
1152 /* Build initializer. */
|
|
|
1153 CONSTRUCTOR_APPEND_ELT (v, NULL_TREE, build_int_cst (NULL_TREE, 0));
|
|
|
1154 e = build_int_cst (build_pointer_type (objc_protocol_template), size);
|
|
|
1155 CONSTRUCTOR_APPEND_ELT (v, NULL_TREE, e);
|
|
|
1156
|
|
|
1157 for (lproto = plist; lproto; lproto = TREE_CHAIN (lproto))
|
|
|
1158 {
|
|
|
1159 tree pval = TREE_VALUE (lproto);
|
|
|
1160
|
|
|
1161 if (TREE_CODE (pval) == PROTOCOL_INTERFACE_TYPE
|
|
|
1162 && PROTOCOL_FORWARD_DECL (pval))
|
|
|
1163 {
|
|
|
1164 tree fwref = PROTOCOL_FORWARD_DECL (pval);
|
|
|
1165 location_t loc = DECL_SOURCE_LOCATION (fwref) ;
|
|
|
1166 e = build_unary_op (loc, ADDR_EXPR, fwref, 0);
|
|
|
1167 CONSTRUCTOR_APPEND_ELT (v, NULL_TREE, e);
|
|
|
1168 }
|
|
|
1169 }
|
|
|
1170
|
|
|
1171 /* static struct objc_protocol *refs[n]; */
|
|
|
1172
|
|
|
1173 switch (TREE_CODE (i_or_p))
|
|
|
1174 {
|
|
|
1175 case PROTOCOL_INTERFACE_TYPE:
|
|
|
1176 snprintf (buf, BUFSIZE, "_OBJC_ProtocolRefs_%s",
|
|
|
1177 IDENTIFIER_POINTER (PROTOCOL_NAME (i_or_p)));
|
|
|
1178 break;
|
|
|
1179 case CLASS_INTERFACE_TYPE:
|
|
|
1180 snprintf (buf, BUFSIZE, "_OBJC_ClassProtocols_%s",
|
|
|
1181 IDENTIFIER_POINTER (CLASS_NAME (i_or_p)));
|
|
|
1182 break;
|
|
|
1183 case CATEGORY_INTERFACE_TYPE:
|
|
|
1184 snprintf (buf, BUFSIZE, "_OBJC_CategoryProtocols_%s_%s",
|
|
|
1185 IDENTIFIER_POINTER (CLASS_NAME (klass_ctxt)),
|
|
|
1186 IDENTIFIER_POINTER (CLASS_SUPER_NAME (klass_ctxt)));
|
|
|
1187 break;
|
|
|
1188 default:
|
|
|
1189 gcc_unreachable ();
|
|
|
1190 }
|
|
|
1191
|
|
|
1192 ptype = build_pointer_type (objc_protocol_template);
|
|
|
1193 array_type = build_sized_array_type (ptype, size + 3);
|
|
|
1194 refs_decl = start_var_decl (array_type, buf);
|
|
|
1195 OBJCMETA (refs_decl, objc_meta, meta_base);
|
|
|
1196 finish_var_decl (refs_decl,
|
|
|
1197 objc_build_constructor (TREE_TYPE (refs_decl), v));
|
|
|
1198
|
|
|
1199 return refs_decl;
|
|
|
1200 }
|
|
|
1201
|
|
|
1202 static tree
|
|
|
1203 generate_v1_meth_descriptor_table (tree chain, tree protocol, const char *prefix)
|
|
|
1204 {
|
|
|
1205 tree method_list_template, initlist, decl;
|
|
|
1206 int size;
|
|
|
1207 vec<constructor_elt, va_gc> *v = NULL;
|
|
|
1208 char buf[BUFSIZE];
|
|
|
1209
|
|
|
1210 if (!chain || !prefix)
|
|
|
1211 return NULL_TREE;
|
|
|
1212
|
|
|
1213 if (!objc_method_prototype_template)
|
|
|
1214 objc_method_prototype_template = build_method_prototype_template ();
|
|
|
1215
|
|
|
1216 size = list_length (chain);
|
|
|
1217 method_list_template =
|
|
|
1218 build_method_prototype_list_template (objc_method_prototype_template,
|
|
|
1219 size);
|
|
|
1220 snprintf (buf, BUFSIZE, "%s_%s", prefix,
|
|
|
1221 IDENTIFIER_POINTER (PROTOCOL_NAME (protocol)));
|
|
|
1222
|
|
|
1223 decl = start_var_decl (method_list_template, buf);
|
|
|
1224
|
|
|
1225 CONSTRUCTOR_APPEND_ELT (v, NULL_TREE, build_int_cst (NULL_TREE, size));
|
|
|
1226 initlist =
|
|
|
1227 build_descriptor_table_initializer (objc_method_prototype_template,
|
|
|
1228 chain);
|
|
|
1229 CONSTRUCTOR_APPEND_ELT (v, NULL_TREE, initlist);
|
|
|
1230 OBJCMETA (decl, objc_meta, meta_base);
|
|
|
1231 finish_var_decl (decl, objc_build_constructor (method_list_template, v));
|
|
|
1232 return decl;
|
|
|
1233 }
|
|
|
1234
|
|
|
1235 /* For each protocol which was referenced either from a @protocol()
|
|
|
1236 expression, or because a class/category implements it (then a
|
|
|
1237 pointer to the protocol is stored in the struct describing the
|
|
|
1238 class/category), we create a statically allocated instance of the
|
|
|
1239 Protocol class. The code is written in such a way as to generate
|
|
|
1240 as few Protocol objects as possible; we generate a unique Protocol
|
|
|
1241 instance for each protocol, and we don't generate a Protocol
|
|
|
1242 instance if the protocol is never referenced (either from a
|
|
|
1243 @protocol() or from a class/category implementation). These
|
|
|
1244 statically allocated objects can be referred to via the static
|
|
|
1245 (that is, private to this module) symbols _OBJC_PROTOCOL_n.
|
|
|
1246
|
|
|
1247 The statically allocated Protocol objects that we generate here
|
|
|
1248 need to be fixed up at runtime in order to be used: the 'isa'
|
|
|
1249 pointer of the objects need to be set up to point to the 'Protocol'
|
|
|
1250 class, as known at runtime.
|
|
|
1251
|
|
|
1252 The GNU runtime fixes up all protocols before user code from the module
|
|
|
1253 is executed; it requires pointers to those symbols
|
|
|
1254 to be put in the objc_symtab (which is then passed as argument to
|
|
|
1255 the function __objc_exec_class() which the compiler sets up to be
|
|
|
1256 executed automatically when the module is loaded); setup of those
|
|
|
1257 Protocol objects happen in two ways in the GNU runtime: all
|
|
|
1258 Protocol objects referred to by a class or category implementation
|
|
|
1259 are fixed up when the class/category is loaded; all Protocol
|
|
|
1260 objects referred to by a @protocol() expression are added by the
|
|
|
1261 compiler to the list of statically allocated instances to fixup
|
|
|
1262 (the same list holding the statically allocated constant string
|
|
|
1263 objects). Because, as explained above, the compiler generates as
|
|
|
1264 few Protocol objects as possible, some Protocol object might end up
|
|
|
1265 being referenced multiple times when compiled with the GNU runtime,
|
|
|
1266 and end up being fixed up multiple times at runtime initialization.
|
|
|
1267 But that doesn't hurt, it's just a little inefficient. */
|
|
|
1268
|
|
|
1269 static void
|
|
|
1270 generate_protocols (void)
|
|
|
1271 {
|
|
|
1272 tree p, encoding;
|
|
|
1273 tree decl;
|
|
|
1274 tree initlist, protocol_name_expr, refs_decl, refs_expr;
|
|
|
1275
|
|
|
1276 /* If a protocol was directly referenced, pull in indirect references. */
|
|
|
1277 for (p = protocol_chain; p; p = TREE_CHAIN (p))
|
|
|
1278 if (PROTOCOL_FORWARD_DECL (p) && PROTOCOL_LIST (p))
|
|
|
1279 generate_protocol_references (PROTOCOL_LIST (p));
|
|
|
1280
|
|
|
1281 for (p = protocol_chain; p; p = TREE_CHAIN (p))
|
|
|
1282 {
|
|
|
1283 tree nst_methods = PROTOCOL_NST_METHODS (p);
|
|
|
1284 tree cls_methods = PROTOCOL_CLS_METHODS (p);
|
|
|
1285
|
|
|
1286 /* If protocol wasn't referenced, don't generate any code. */
|
|
|
1287 decl = PROTOCOL_FORWARD_DECL (p);
|
|
|
1288
|
|
|
1289 if (!decl)
|
|
|
1290 continue;
|
|
|
1291
|
|
|
1292 /* Make sure we link in the Protocol class. */
|
|
|
1293 add_class_reference (get_identifier (PROTOCOL_OBJECT_CLASS_NAME));
|
|
|
1294
|
|
|
1295 while (nst_methods)
|
|
|
1296 {
|
|
|
1297 if (! METHOD_ENCODING (nst_methods))
|
|
|
1298 {
|
|
|
1299 encoding = encode_method_prototype (nst_methods);
|
|
|
1300 METHOD_ENCODING (nst_methods) = encoding;
|
|
|
1301 }
|
|
|
1302 nst_methods = DECL_CHAIN (nst_methods);
|
|
|
1303 }
|
|
|
1304
|
|
|
1305 UOBJC_INSTANCE_METHODS_decl =
|
|
|
1306 generate_v1_meth_descriptor_table (PROTOCOL_NST_METHODS (p), p,
|
|
|
1307 "_OBJC_PROTOCOL_INSTANCE_METHODS");
|
|
|
1308
|
|
|
1309 while (cls_methods)
|
|
|
1310 {
|
|
|
1311 if (! METHOD_ENCODING (cls_methods))
|
|
|
1312 {
|
|
|
1313 encoding = encode_method_prototype (cls_methods);
|
|
|
1314 METHOD_ENCODING (cls_methods) = encoding;
|
|
|
1315 }
|
|
|
1316
|
|
|
1317 cls_methods = DECL_CHAIN (cls_methods);
|
|
|
1318 }
|
|
|
1319
|
|
|
1320 UOBJC_CLASS_METHODS_decl =
|
|
|
1321 generate_v1_meth_descriptor_table (PROTOCOL_CLS_METHODS (p), p,
|
|
|
1322 "_OBJC_PROTOCOL_CLASS_METHODS");
|
|
|
1323 /* generate_method_descriptors (p);*/
|
|
|
1324
|
|
|
1325 if (PROTOCOL_LIST (p))
|
|
|
1326 refs_decl = generate_protocol_list (p, NULL_TREE);
|
|
|
1327 else
|
|
|
1328 refs_decl = 0;
|
|
|
1329
|
|
|
1330 /* static struct objc_protocol _OBJC_PROTOCOL_<mumble>; */
|
|
|
1331 protocol_name_expr = add_objc_string (PROTOCOL_NAME (p), class_names);
|
|
|
1332
|
|
|
1333 if (refs_decl)
|
|
|
1334 refs_expr = convert (build_pointer_type (build_pointer_type
|
|
|
1335 (objc_protocol_template)),
|
|
|
1336 build_unary_op (input_location,
|
|
|
1337 ADDR_EXPR, refs_decl, 0));
|
|
|
1338 else
|
|
|
1339 refs_expr = build_int_cst (NULL_TREE, 0);
|
|
|
1340
|
|
|
1341 /* UOBJC_INSTANCE_METHODS_decl/UOBJC_CLASS_METHODS_decl are set
|
|
|
1342 by generate_method_descriptors, which is called above. */
|
|
|
1343 initlist = build_protocol_initializer (TREE_TYPE (decl),
|
|
|
1344 protocol_name_expr, refs_expr,
|
|
|
1345 UOBJC_INSTANCE_METHODS_decl,
|
|
|
1346 UOBJC_CLASS_METHODS_decl);
|
|
|
1347 finish_var_decl (decl, initlist);
|
|
|
1348 }
|
|
|
1349 }
|
|
|
1350
|
|
|
1351 static tree
|
|
|
1352 generate_dispatch_table (tree chain, const char *name)
|
|
|
1353 {
|
|
|
1354 tree decl, method_list_template, initlist;
|
|
|
1355 vec<constructor_elt, va_gc> *v = NULL;
|
|
|
1356 int size = list_length (chain);
|
|
|
1357
|
|
|
1358 if (!objc_method_template)
|
|
|
1359 objc_method_template = build_method_template ();
|
|
|
1360
|
|
|
1361 method_list_template = build_method_list_template (objc_method_template,
|
|
|
1362 size);
|
|
|
1363 initlist = build_dispatch_table_initializer (objc_method_template, chain);
|
|
|
1364
|
|
|
1365 decl = start_var_decl (method_list_template, name);
|
|
|
1366
|
|
|
1367 CONSTRUCTOR_APPEND_ELT (v, NULL_TREE, integer_zero_node);
|
|
|
1368 CONSTRUCTOR_APPEND_ELT (v, NULL_TREE,
|
|
|
1369 build_int_cst (integer_type_node, size));
|
|
|
1370 CONSTRUCTOR_APPEND_ELT (v, NULL_TREE, initlist);
|
|
|
1371
|
|
|
1372 OBJCMETA (decl, objc_meta, meta_base);
|
|
|
1373 finish_var_decl (decl,
|
|
|
1374 objc_build_constructor (TREE_TYPE (decl), v));
|
|
|
1375
|
|
|
1376 return decl;
|
|
|
1377 }
|
|
|
1378
|
|
|
1379 /* Init a category. */
|
|
|
1380 static tree
|
|
|
1381 build_category_initializer (tree type, tree cat_name, tree class_name,
|
|
|
1382 tree inst_methods, tree class_methods,
|
|
|
1383 tree protocol_list)
|
|
|
1384 {
|
|
|
1385 tree expr, ltyp;
|
|
|
1386 location_t loc;
|
|
|
1387 vec<constructor_elt, va_gc> *v = NULL;
|
|
|
1388
|
|
|
1389 /* TODO: pass the loc in or find it from args. */
|
|
|
1390 /* TODO: pass the loc in or find it from args. */
|
|
|
1391 loc = UNKNOWN_LOCATION;
|
|
|
1392 CONSTRUCTOR_APPEND_ELT (v, NULL_TREE, cat_name);
|
|
|
1393 CONSTRUCTOR_APPEND_ELT (v, NULL_TREE, class_name);
|
|
|
1394
|
|
|
1395 ltyp = objc_method_list_ptr;
|
|
|
1396 if (inst_methods)
|
|
|
1397 expr = convert (ltyp, build_unary_op (loc, ADDR_EXPR, inst_methods, 0));
|
|
|
1398 else
|
|
|
1399 expr = convert (ltyp, null_pointer_node);
|
|
|
1400 CONSTRUCTOR_APPEND_ELT (v, NULL_TREE, expr);
|
|
|
1401
|
|
|
1402 if (class_methods)
|
|
|
1403 expr = convert (ltyp, build_unary_op (loc, ADDR_EXPR, class_methods, 0));
|
|
|
1404 else
|
|
|
1405 expr = convert (ltyp, null_pointer_node);
|
|
|
1406 CONSTRUCTOR_APPEND_ELT (v, NULL_TREE, expr);
|
|
|
1407
|
|
|
1408 /* protocol_list = */
|
|
|
1409 ltyp = build_pointer_type (build_pointer_type (objc_protocol_template));
|
|
|
1410 if (protocol_list)
|
|
|
1411 expr = convert (ltyp, build_unary_op (loc, ADDR_EXPR, protocol_list, 0));
|
|
|
1412 else
|
|
|
1413 expr = convert (ltyp, null_pointer_node);
|
|
|
1414 CONSTRUCTOR_APPEND_ELT (v, NULL_TREE, expr);
|
|
|
1415
|
|
|
1416 return objc_build_constructor (type, v);
|
|
|
1417 }
|
|
|
1418
|
|
|
1419 /* static struct objc_category _OBJC_CATEGORY_<name> = { ... }; */
|
|
|
1420
|
|
|
1421 static void
|
|
|
1422 generate_category (struct imp_entry *impent)
|
|
|
1423 {
|
|
|
1424 tree initlist, cat_name_expr, class_name_expr;
|
|
|
1425 tree protocol_decl, category, cat_decl;
|
|
|
1426 tree inst_methods = NULL_TREE, class_methods = NULL_TREE;
|
|
|
1427 tree cat = impent->imp_context;
|
|
|
1428 char buf[BUFSIZE];
|
|
|
1429
|
|
|
1430 cat_decl = impent->class_decl;
|
|
|
1431
|
|
|
1432 add_class_reference (CLASS_NAME (cat));
|
|
|
1433 cat_name_expr = add_objc_string (CLASS_SUPER_NAME (cat), class_names);
|
|
|
1434
|
|
|
1435 class_name_expr = add_objc_string (CLASS_NAME (cat), class_names);
|
|
|
1436
|
|
|
1437 category = lookup_category (impent->imp_template, CLASS_SUPER_NAME (cat));
|
|
|
1438
|
|
|
1439 if (category && CLASS_PROTOCOL_LIST (category))
|
|
|
1440 {
|
|
|
1441 generate_protocol_references (CLASS_PROTOCOL_LIST (category));
|
|
|
1442 protocol_decl = generate_protocol_list (category, cat);
|
|
|
1443 }
|
|
|
1444 else
|
|
|
1445 protocol_decl = 0;
|
|
|
1446
|
|
|
1447 if (CLASS_NST_METHODS (cat))
|
|
|
1448 {
|
|
|
1449 snprintf (buf, BUFSIZE, "_OBJC_CategoryInstanceMethods_%s_%s",
|
|
|
1450 IDENTIFIER_POINTER (CLASS_NAME (cat)),
|
|
|
1451 IDENTIFIER_POINTER (CLASS_SUPER_NAME (cat)));
|
|
|
1452 inst_methods = generate_dispatch_table (CLASS_NST_METHODS (cat), buf);
|
|
|
1453 }
|
|
|
1454
|
|
|
1455 if (CLASS_CLS_METHODS (cat))
|
|
|
1456 {
|
|
|
1457 snprintf (buf, BUFSIZE, "_OBJC_CategoryClassMethods_%s_%s",
|
|
|
1458 IDENTIFIER_POINTER (CLASS_NAME (cat)),
|
|
|
1459 IDENTIFIER_POINTER (CLASS_SUPER_NAME (cat)));
|
|
|
1460 class_methods = generate_dispatch_table (CLASS_CLS_METHODS (cat), buf);
|
|
|
1461 }
|
|
|
1462
|
|
|
1463 initlist = build_category_initializer (TREE_TYPE (cat_decl),
|
|
|
1464 cat_name_expr, class_name_expr,
|
|
|
1465 inst_methods, class_methods,
|
|
|
1466 protocol_decl);
|
|
|
1467 /* Finish and initialize the forward decl. */
|
|
|
1468 finish_var_decl (cat_decl, initlist);
|
|
|
1469 impent->class_decl = cat_decl;
|
|
|
1470 }
|
|
|
1471
|
|
|
1472 /* struct _objc_class {
|
|
|
1473 struct objc_class *isa;
|
|
|
1474 struct objc_class *super_class;
|
|
|
1475 char *name;
|
|
|
1476 long version;
|
|
|
1477 long info;
|
|
|
1478 long instance_size;
|
|
|
1479 struct objc_ivar_list *ivars;
|
|
|
1480 struct objc_method_list *methods;
|
|
|
1481 struct sarray *dtable;
|
|
|
1482 struct objc_class *subclass_list;
|
|
|
1483 struct objc_class *sibling_class;
|
|
|
1484 struct objc_protocol_list *protocols;
|
|
|
1485 void *gc_object_type;
|
|
|
1486 }; */
|
|
|
1487
|
|
|
1488 static tree
|
|
|
1489 build_shared_structure_initializer (tree type, tree isa, tree super,
|
|
|
1490 tree name, tree size, int status,
|
|
|
1491 tree dispatch_table, tree ivar_list,
|
|
|
1492 tree protocol_list)
|
|
|
1493 {
|
|
|
1494 tree expr, ltyp;
|
|
|
1495 vec<constructor_elt, va_gc> *v = NULL;
|
|
|
1496
|
|
|
1497 /* isa = */
|
|
|
1498 CONSTRUCTOR_APPEND_ELT (v, NULL_TREE, isa);
|
|
|
1499
|
|
|
1500 /* super_class = */
|
|
|
1501 CONSTRUCTOR_APPEND_ELT (v, NULL_TREE, super);
|
|
|
1502
|
|
|
1503 /* name = */
|
|
|
1504 CONSTRUCTOR_APPEND_ELT (v, NULL_TREE, default_conversion (name));
|
|
|
1505
|
|
|
1506 /* version = */
|
|
|
1507 CONSTRUCTOR_APPEND_ELT (v, NULL_TREE,
|
|
|
1508 build_int_cst (long_integer_type_node, 0));
|
|
|
1509
|
|
|
1510 /* info = */
|
|
|
1511 CONSTRUCTOR_APPEND_ELT (v, NULL_TREE,
|
|
|
1512 build_int_cst (long_integer_type_node, status));
|
|
|
1513
|
|
|
1514 /* instance_size = */
|
|
|
1515 CONSTRUCTOR_APPEND_ELT (v, NULL_TREE,
|
|
|
1516 convert (long_integer_type_node, size));
|
|
|
1517
|
|
|
1518 /* objc_ivar_list = */
|
|
|
1519 if (!ivar_list)
|
|
|
1520 CONSTRUCTOR_APPEND_ELT (v, NULL_TREE,
|
|
|
1521 build_int_cst (objc_ivar_list_ptr, 0));
|
|
|
1522 else
|
|
|
1523 {
|
|
|
1524 expr = convert (objc_ivar_list_ptr,
|
|
|
1525 build_unary_op (input_location, ADDR_EXPR,
|
|
|
1526 ivar_list, 0));
|
|
|
1527 CONSTRUCTOR_APPEND_ELT (v, NULL_TREE, expr);
|
|
|
1528 }
|
|
|
1529
|
|
|
1530 /* objc_method_list = */
|
|
|
1531 if (!dispatch_table)
|
|
|
1532 CONSTRUCTOR_APPEND_ELT (v, NULL_TREE,
|
|
|
1533 convert (objc_method_list_ptr, null_pointer_node));
|
|
|
1534 else
|
|
|
1535 {
|
|
|
1536 expr = convert (objc_method_list_ptr,
|
|
|
1537 build_unary_op (input_location, ADDR_EXPR,
|
|
|
1538 dispatch_table, 0));
|
|
|
1539 CONSTRUCTOR_APPEND_ELT (v, NULL_TREE, expr);
|
|
|
1540 }
|
|
|
1541
|
|
|
1542 /* FIXME: Remove NeXT runtime code. */
|
|
|
1543 if (flag_next_runtime)
|
|
|
1544 {
|
|
|
1545 ltyp = build_pointer_type (xref_tag (RECORD_TYPE,
|
|
|
1546 get_identifier ("objc_cache")));
|
|
|
1547 /* method_cache = */
|
|
|
1548 CONSTRUCTOR_APPEND_ELT (v, NULL_TREE, convert (ltyp, null_pointer_node));
|
|
|
1549 }
|
|
|
1550 else
|
|
|
1551 {
|
|
|
1552 /* dtable = */
|
|
|
1553 CONSTRUCTOR_APPEND_ELT (v, NULL_TREE, build_int_cst (NULL_TREE, 0));
|
|
|
1554
|
|
|
1555 /* subclass_list = */
|
|
|
1556 CONSTRUCTOR_APPEND_ELT (v, NULL_TREE, build_int_cst (NULL_TREE, 0));
|
|
|
1557
|
|
|
1558 /* sibling_class = */
|
|
|
1559 CONSTRUCTOR_APPEND_ELT (v, NULL_TREE, build_int_cst (NULL_TREE, 0));
|
|
|
1560 }
|
|
|
1561
|
|
|
1562 /* protocol_list = */
|
|
|
1563 ltyp = build_pointer_type (build_pointer_type (objc_protocol_template));
|
|
|
1564 if (! protocol_list)
|
|
|
1565 CONSTRUCTOR_APPEND_ELT (v, NULL_TREE, build_int_cst (ltyp, 0));
|
|
|
1566 else
|
|
|
1567 {
|
|
|
1568 expr = convert (ltyp,
|
|
|
1569 build_unary_op (input_location, ADDR_EXPR,
|
|
|
1570 protocol_list, 0));
|
|
|
1571 CONSTRUCTOR_APPEND_ELT (v, NULL_TREE, expr);
|
|
|
1572 }
|
|
|
1573
|
|
|
1574 /* FIXME: Remove NeXT runtime code. */
|
|
|
1575 if (flag_next_runtime)
|
|
|
1576 /* sel_id = NULL */
|
|
|
1577 CONSTRUCTOR_APPEND_ELT (v, NULL_TREE, build_int_cst (NULL_TREE, 0));
|
|
|
1578
|
|
|
1579 /* gc_object_type = NULL */
|
|
|
1580 CONSTRUCTOR_APPEND_ELT (v, NULL_TREE, build_int_cst (NULL_TREE, 0));
|
|
|
1581
|
|
|
1582 return objc_build_constructor (type, v);
|
|
|
1583 }
|
|
|
1584
|
|
|
1585
|
|
|
1586 static tree
|
|
|
1587 generate_ivars_list (tree chain, const char *name)
|
|
|
1588 {
|
|
|
1589 tree initlist, ivar_list_template, decl;
|
|
|
1590 int size;
|
|
|
1591 vec<constructor_elt, va_gc> *inits = NULL;
|
|
|
1592
|
|
|
1593 if (!chain)
|
|
|
1594 return NULL_TREE;
|
|
|
1595
|
|
|
1596 if (!objc_ivar_template)
|
|
|
1597 objc_ivar_template = build_ivar_template ();
|
|
|
1598
|
|
|
1599 size = ivar_list_length (chain);
|
|
|
1600
|
|
|
1601 generating_instance_variables = 1;
|
|
|
1602 ivar_list_template = build_ivar_list_template (objc_ivar_template, size);
|
|
|
1603 initlist = build_ivar_list_initializer (objc_ivar_template, chain);
|
|
|
1604 generating_instance_variables = 0;
|
|
|
1605
|
|
|
1606 decl = start_var_decl (ivar_list_template, name);
|
|
|
1607
|
|
|
1608 CONSTRUCTOR_APPEND_ELT (inits, NULL_TREE, build_int_cst (NULL_TREE, size));
|
|
|
1609 CONSTRUCTOR_APPEND_ELT (inits, NULL_TREE, initlist);
|
|
|
1610
|
|
|
1611 OBJCMETA (decl, objc_meta, meta_base);
|
|
|
1612 finish_var_decl (decl,
|
|
|
1613 objc_build_constructor (TREE_TYPE (decl), inits));
|
|
|
1614
|
|
|
1615 return decl;
|
|
|
1616 }
|
|
|
1617
|
|
|
1618 /* static struct objc_class _OBJC_METACLASS_Foo={ ... };
|
|
|
1619 static struct objc_class _OBJC_CLASS_Foo={ ... }; */
|
|
|
1620
|
|
|
1621 static void
|
|
|
1622 generate_class_structures (struct imp_entry *impent)
|
|
|
1623 {
|
|
|
1624 tree name_expr, super_expr, root_expr, class_decl, meta_decl;
|
|
|
1625 tree my_root_id, my_super_id;
|
|
|
1626 tree cast_type, initlist, protocol_decl;
|
|
|
1627 tree inst_methods = NULL_TREE, class_methods = NULL_TREE;
|
|
|
1628 tree chain, inst_ivars = NULL_TREE, class_ivars = NULL_TREE;
|
|
|
1629 location_t loc;
|
|
|
1630 char buf[BUFSIZE];
|
|
|
1631 int cls_flags = 0 ;
|
|
|
1632
|
|
|
1633 /* objc_implementation_context = impent->imp_context;
|
|
|
1634 implementation_template = impent->imp_template;*/
|
|
|
1635 class_decl = impent->class_decl;
|
|
|
1636 meta_decl = impent->meta_decl;
|
|
|
1637 /* UOBJC_CLASS_decl = impent->class_decl;
|
|
|
1638 UOBJC_METACLASS_decl = impent->meta_decl;*/
|
|
|
1639
|
|
|
1640 loc = DECL_SOURCE_LOCATION (impent->class_decl);
|
|
|
1641
|
|
|
1642 my_super_id = CLASS_SUPER_NAME (impent->imp_template);
|
|
|
1643 if (my_super_id)
|
|
|
1644 {
|
|
|
1645 add_class_reference (my_super_id);
|
|
|
1646
|
|
|
1647 /* Compute "my_root_id" - this is required for code generation.
|
|
|
1648 the "isa" for all meta class structures points to the root of
|
|
|
1649 the inheritance hierarchy (e.g. "__Object")... */
|
|
|
1650 my_root_id = my_super_id;
|
|
|
1651 do
|
|
|
1652 {
|
|
|
1653 tree my_root_int = lookup_interface (my_root_id);
|
|
|
1654
|
|
|
1655 if (my_root_int && CLASS_SUPER_NAME (my_root_int))
|
|
|
1656 my_root_id = CLASS_SUPER_NAME (my_root_int);
|
|
|
1657 else
|
|
|
1658 break;
|
|
|
1659 }
|
|
|
1660 while (1);
|
|
|
1661 }
|
|
|
1662 else
|
|
|
1663 /* No super class. */
|
|
|
1664 my_root_id = CLASS_NAME (impent->imp_template);
|
|
|
1665
|
|
|
1666 cast_type = build_pointer_type (objc_class_template);
|
|
|
1667 name_expr = add_objc_string (CLASS_NAME (impent->imp_template),
|
|
|
1668 class_names);
|
|
|
1669
|
|
|
1670 /* Install class `isa' and `super' pointers at runtime. */
|
|
|
1671 if (my_super_id)
|
|
|
1672 super_expr = add_objc_string (my_super_id, class_names);
|
|
|
1673 else
|
|
|
1674 super_expr = null_pointer_node;
|
|
|
1675
|
|
|
1676 super_expr = build_c_cast (loc, cast_type, super_expr);
|
|
|
1677
|
|
|
1678 root_expr = add_objc_string (my_root_id, class_names);
|
|
|
1679 root_expr = build_c_cast (loc, cast_type, root_expr);
|
|
|
1680
|
|
|
1681 if (CLASS_PROTOCOL_LIST (impent->imp_template))
|
|
|
1682 {
|
|
|
1683 generate_protocol_references (CLASS_PROTOCOL_LIST (impent->imp_template));
|
|
|
1684 protocol_decl = generate_protocol_list (impent->imp_template,
|
|
|
1685 impent->imp_context);
|
|
|
1686 }
|
|
|
1687 else
|
|
|
1688 protocol_decl = NULL_TREE;
|
|
|
1689
|
|
|
1690 if (CLASS_CLS_METHODS (impent->imp_context))
|
|
|
1691 {
|
|
|
1692 snprintf (buf, BUFSIZE, "_OBJC_ClassMethods_%s",
|
|
|
1693 IDENTIFIER_POINTER (CLASS_NAME (impent->imp_context)));
|
|
|
1694 class_methods = generate_dispatch_table (CLASS_CLS_METHODS (impent->imp_context),
|
|
|
1695 buf);
|
|
|
1696 }
|
|
|
1697
|
|
|
1698 if (CLASS_SUPER_NAME (impent->imp_template) == NULL_TREE
|
|
|
1699 && (chain = TYPE_FIELDS (objc_class_template)))
|
|
|
1700 {
|
|
|
1701 snprintf (buf, BUFSIZE, "_OBJC_ClassIvars_%s",
|
|
|
1702 IDENTIFIER_POINTER (CLASS_NAME (impent->imp_context)));
|
|
|
1703 class_ivars = generate_ivars_list (chain, buf);
|
|
|
1704 }
|
|
|
1705
|
|
|
1706 /* static struct objc_class _OBJC_METACLASS_Foo = { ... }; */
|
|
|
1707
|
|
|
1708 initlist =
|
|
|
1709 build_shared_structure_initializer
|
|
|
1710 (TREE_TYPE (meta_decl),
|
|
|
1711 root_expr, super_expr, name_expr,
|
|
|
1712 convert (integer_type_node,
|
|
|
1713 TYPE_SIZE_UNIT (objc_class_template)),
|
|
|
1714 CLS_META, class_methods, class_ivars,
|
|
|
1715 protocol_decl);
|
|
|
1716
|
|
|
1717 finish_var_decl (meta_decl, initlist);
|
|
|
1718 impent->meta_decl = meta_decl;
|
|
|
1719
|
|
|
1720 /* static struct objc_class _OBJC_CLASS_Foo={ ... }; */
|
|
|
1721 if (CLASS_NST_METHODS (impent->imp_context))
|
|
|
1722 {
|
|
|
1723 snprintf (buf, BUFSIZE, "_OBJC_InstanceMethods_%s",
|
|
|
1724 IDENTIFIER_POINTER (CLASS_NAME (impent->imp_context)));
|
|
|
1725 inst_methods = generate_dispatch_table (CLASS_NST_METHODS (impent->imp_context),
|
|
|
1726 buf);
|
|
|
1727 }
|
|
|
1728
|
|
|
1729 if ((chain = CLASS_IVARS (impent->imp_template)))
|
|
|
1730 {
|
|
|
1731 snprintf (buf, BUFSIZE, "_OBJC_InstanceIvars_%s",
|
|
|
1732 IDENTIFIER_POINTER (CLASS_NAME (impent->imp_context)));
|
|
|
1733 inst_ivars = generate_ivars_list (chain, buf);
|
|
|
1734 }
|
|
|
1735
|
|
|
1736 initlist =
|
|
|
1737 build_shared_structure_initializer
|
|
|
1738 (TREE_TYPE (class_decl),
|
|
|
1739 build_unary_op (loc, ADDR_EXPR, meta_decl, 0),
|
|
|
1740 super_expr, name_expr,
|
|
|
1741 convert (integer_type_node,
|
|
|
1742 TYPE_SIZE_UNIT (CLASS_STATIC_TEMPLATE
|
|
|
1743 (impent->imp_template))),
|
|
|
1744 CLS_FACTORY | cls_flags, inst_methods, inst_ivars,
|
|
|
1745 protocol_decl);
|
|
|
1746
|
|
|
1747 finish_var_decl (class_decl, initlist);
|
|
|
1748 impent->class_decl = class_decl;
|
|
|
1749 }
|
|
|
1750
|
|
|
1751 /* --- Output GNU Metadata --- */
|
|
|
1752
|
|
|
1753 /* TODO: Make this into an array of refs. */
|
|
|
1754 static void
|
|
|
1755 handle_class_ref (tree chain)
|
|
|
1756 {
|
|
|
1757 const char *name = IDENTIFIER_POINTER (TREE_VALUE (chain));
|
|
|
1758 char *string = (char *) alloca (strlen (name) + 30);
|
|
|
1759 tree decl;
|
|
|
1760 tree exp;
|
|
|
1761
|
|
|
1762 sprintf (string, "__objc_class_name_%s", name);
|
|
|
1763
|
|
|
1764 /* Make a decl for this name, so we can use its address in a tree. */
|
|
|
1765 decl = build_decl (input_location,
|
|
|
1766 VAR_DECL, get_identifier (string), TREE_TYPE (integer_zero_node));
|
|
|
1767 DECL_EXTERNAL (decl) = 1;
|
|
|
1768 TREE_PUBLIC (decl) = 1;
|
|
|
1769 DECL_CONTEXT (decl) = NULL_TREE;
|
|
|
1770 finish_var_decl (decl, 0);
|
|
|
1771
|
|
|
1772 /* Make a decl for the address. */
|
|
|
1773 sprintf (string, "__objc_class_ref_%s", name);
|
|
|
1774 exp = build1 (ADDR_EXPR, string_type_node, decl);
|
|
|
1775 decl = build_decl (input_location,
|
|
|
1776 VAR_DECL, get_identifier (string), string_type_node);
|
|
|
1777 TREE_STATIC (decl) = 1;
|
|
|
1778 TREE_USED (decl) = 1;
|
|
|
1779 DECL_READ_P (decl) = 1;
|
|
|
1780 DECL_ARTIFICIAL (decl) = 1;
|
|
|
1781 DECL_INITIAL (decl) = error_mark_node;
|
|
|
1782
|
|
|
1783 /* We must force the reference. */
|
|
|
1784 DECL_PRESERVE_P (decl) = 1;
|
|
|
1785
|
|
|
1786 DECL_CONTEXT (decl) = NULL_TREE;
|
|
|
1787 finish_var_decl (decl, exp);
|
|
|
1788 }
|
|
|
1789
|
|
|
1790 static tree
|
|
|
1791 get_proto_encoding (tree proto)
|
|
|
1792 {
|
|
|
1793 tree encoding;
|
|
|
1794 if (proto)
|
|
|
1795 {
|
|
|
1796 if (! METHOD_ENCODING (proto))
|
|
|
1797 {
|
|
|
1798 encoding = encode_method_prototype (proto);
|
|
|
1799 METHOD_ENCODING (proto) = encoding;
|
|
|
1800 }
|
|
|
1801 else
|
|
|
1802 encoding = METHOD_ENCODING (proto);
|
|
|
1803
|
|
|
1804 return add_objc_string (encoding, meth_var_types);
|
|
|
1805 }
|
|
|
1806 else
|
|
|
1807 return build_int_cst (NULL_TREE, 0);
|
|
|
1808 }
|
|
|
1809
|
|
|
1810 static void
|
|
|
1811 build_gnu_selector_translation_table (void)
|
|
|
1812 {
|
|
|
1813 tree chain, expr;
|
|
|
1814 vec<constructor_elt, va_gc> *inits = NULL;
|
|
|
1815 vec<constructor_elt, va_gc> *v ;
|
|
|
1816
|
|
|
1817 /* Cause the selector table (previously forward-declared)
|
|
|
1818 to be actually output. */
|
|
|
1819
|
|
|
1820 for (chain = sel_ref_chain; chain; chain = TREE_CHAIN (chain))
|
|
|
1821 {
|
|
|
1822 tree encoding;
|
|
|
1823 if (warn_selector)
|
|
|
1824 {
|
|
|
1825 /* TODO: improve on the location for the diagnostic. */
|
|
|
1826 location_t loc = input_location;
|
|
|
1827 diagnose_missing_method (TREE_VALUE (chain), loc);
|
|
|
1828 }
|
|
|
1829
|
|
|
1830 v = NULL;
|
|
|
1831 expr = build_selector (TREE_VALUE (chain));
|
|
|
1832 encoding = get_proto_encoding (TREE_PURPOSE (chain));
|
|
|
1833 CONSTRUCTOR_APPEND_ELT (v, NULL_TREE, expr);
|
|
|
1834 CONSTRUCTOR_APPEND_ELT (v, NULL_TREE, encoding);
|
|
|
1835 expr = objc_build_constructor (objc_selector_template, v);
|
|
|
1836
|
|
|
1837 CONSTRUCTOR_APPEND_ELT (inits, NULL_TREE, expr);
|
|
|
1838 } /* each element in the chain */
|
|
|
1839
|
|
|
1840 /* List terminator. */
|
|
|
1841 v = NULL;
|
|
|
1842 CONSTRUCTOR_APPEND_ELT (v, NULL_TREE, integer_zero_node);
|
|
|
1843 CONSTRUCTOR_APPEND_ELT (v, NULL_TREE, integer_zero_node);
|
|
|
1844 expr = objc_build_constructor (objc_selector_template, v);
|
|
|
1845
|
|
|
1846 CONSTRUCTOR_APPEND_ELT (inits, NULL_TREE, expr);
|
|
|
1847 expr = objc_build_constructor (TREE_TYPE (UOBJC_SELECTOR_TABLE_decl),
|
|
|
1848 inits);
|
|
|
1849 finish_var_decl (UOBJC_SELECTOR_TABLE_decl, expr);
|
|
|
1850 }
|
|
|
1851
|
|
|
1852 /* Output references to all statically allocated objects. Return the DECL
|
|
|
1853 for the array built. */
|
|
|
1854
|
|
|
1855 static void
|
|
|
1856 generate_static_references (void)
|
|
|
1857 {
|
|
|
1858 tree expr = NULL_TREE;
|
|
|
1859 tree class_name, klass, decl;
|
|
|
1860 tree cl_chain, in_chain, type
|
|
|
1861 = build_array_type (build_pointer_type (void_type_node), NULL_TREE);
|
|
|
1862 int num_inst, num_class;
|
|
|
1863 char buf[BUFSIZE];
|
|
|
1864 vec<constructor_elt, va_gc> *decls = NULL;
|
|
|
1865
|
|
|
1866 /* FIXME: Remove NeXT runtime code. */
|
|
|
1867 if (flag_next_runtime)
|
|
|
1868 gcc_unreachable ();
|
|
|
1869
|
|
|
1870 for (cl_chain = objc_static_instances, num_class = 0;
|
|
|
1871 cl_chain; cl_chain = TREE_CHAIN (cl_chain), num_class++)
|
|
|
1872 {
|
|
|
1873 vec<constructor_elt, va_gc> *v = NULL;
|
|
|
1874
|
|
|
1875 for (num_inst = 0, in_chain = TREE_PURPOSE (cl_chain);
|
|
|
1876 in_chain; num_inst++, in_chain = TREE_CHAIN (in_chain));
|
|
|
1877
|
|
|
1878 snprintf (buf, BUFSIZE, "_OBJC_STATIC_INSTANCES_%d", num_class);
|
|
|
1879 decl = start_var_decl (type, buf);
|
|
|
1880
|
|
|
1881 /* Output {class_name, ...}. */
|
|
|
1882 klass = TREE_VALUE (cl_chain);
|
|
|
1883 class_name = get_objc_string_decl (OBJC_TYPE_NAME (klass), class_names);
|
|
|
1884 CONSTRUCTOR_APPEND_ELT (v, NULL_TREE,
|
|
|
1885 build_unary_op (input_location,
|
|
|
1886 ADDR_EXPR, class_name, 1));
|
|
|
1887
|
|
|
1888 /* Output {..., instance, ...}. */
|
|
|
1889 for (in_chain = TREE_PURPOSE (cl_chain);
|
|
|
1890 in_chain; in_chain = TREE_CHAIN (in_chain))
|
|
|
1891 {
|
|
|
1892 expr = build_unary_op (input_location,
|
|
|
1893 ADDR_EXPR, TREE_VALUE (in_chain), 1);
|
|
|
1894 CONSTRUCTOR_APPEND_ELT (v, NULL_TREE, expr);
|
|
|
1895 }
|
|
|
1896
|
|
|
1897 /* Output {..., NULL}. */
|
|
|
1898 CONSTRUCTOR_APPEND_ELT (v, NULL_TREE, build_int_cst (NULL_TREE, 0));
|
|
|
1899
|
|
|
1900 expr = objc_build_constructor (TREE_TYPE (decl), v);
|
|
|
1901 OBJCMETA (decl, objc_meta, meta_base);
|
|
|
1902 finish_var_decl (decl, expr);
|
|
|
1903 CONSTRUCTOR_APPEND_ELT (decls, NULL_TREE,
|
|
|
1904 build_unary_op (input_location,
|
|
|
1905 ADDR_EXPR, decl, 1));
|
|
|
1906 }
|
|
|
1907
|
|
|
1908 CONSTRUCTOR_APPEND_ELT (decls, NULL_TREE, build_int_cst (NULL_TREE, 0));
|
|
|
1909 expr = objc_build_constructor (type, decls);
|
|
|
1910 static_instances_decl = start_var_decl (type, "_OBJC_STATIC_INSTANCES");
|
|
|
1911 OBJCMETA (static_instances_decl, objc_meta, meta_base);
|
|
|
1912 finish_var_decl (static_instances_decl, expr);
|
|
|
1913 }
|
|
|
1914
|
|
|
1915 /* Create the initial value for the `defs' field of _objc_symtab.
|
|
|
1916 This is a CONSTRUCTOR. */
|
|
|
1917
|
|
|
1918 static tree
|
|
|
1919 init_def_list (tree type)
|
|
|
1920 {
|
|
|
1921 tree expr;
|
|
|
1922 struct imp_entry *impent;
|
|
|
1923 location_t loc;
|
|
|
1924 vec<constructor_elt, va_gc> *v = NULL;
|
|
|
1925
|
|
|
1926 if (imp_count)
|
|
|
1927 for (impent = imp_list; impent; impent = impent->next)
|
|
|
1928 {
|
|
|
1929 if (TREE_CODE (impent->imp_context) == CLASS_IMPLEMENTATION_TYPE)
|
|
|
1930 {
|
|
|
1931 loc = DECL_SOURCE_LOCATION (impent->class_decl);
|
|
|
1932 expr = build_unary_op (loc,
|
|
|
1933 ADDR_EXPR, impent->class_decl, 0);
|
|
|
1934 CONSTRUCTOR_APPEND_ELT (v, NULL_TREE, expr);
|
|
|
1935 }
|
|
|
1936 }
|
|
|
1937
|
|
|
1938 if (cat_count)
|
|
|
1939 for (impent = imp_list; impent; impent = impent->next)
|
|
|
1940 {
|
|
|
1941 if (TREE_CODE (impent->imp_context) == CATEGORY_IMPLEMENTATION_TYPE)
|
|
|
1942 {
|
|
|
1943 loc = DECL_SOURCE_LOCATION (impent->class_decl);
|
|
|
1944 expr = build_unary_op (loc,
|
|
|
1945 ADDR_EXPR, impent->class_decl, 0);
|
|
|
1946 CONSTRUCTOR_APPEND_ELT (v, NULL_TREE, expr);
|
|
|
1947 }
|
|
|
1948 }
|
|
|
1949
|
|
|
1950 loc = UNKNOWN_LOCATION;
|
|
|
1951 /* statics = { ..., _OBJC_STATIC_INSTANCES, ... } */
|
|
|
1952 if (static_instances_decl)
|
|
|
1953 expr = build_unary_op (loc, ADDR_EXPR, static_instances_decl, 0);
|
|
|
1954 else
|
|
|
1955 expr = integer_zero_node;
|
|
|
1956 CONSTRUCTOR_APPEND_ELT (v, NULL_TREE, expr);
|
|
|
1957
|
|
|
1958 return objc_build_constructor (type, v);
|
|
|
1959 }
|
|
|
1960
|
|
|
1961 /* Take care of defining and initializing _OBJC_SYMBOLS. */
|
|
|
1962
|
|
|
1963 /* Predefine the following data type:
|
|
|
1964
|
|
|
1965 struct _objc_symtab
|
|
|
1966 {
|
|
|
1967 long sel_ref_cnt;
|
|
|
1968 SEL *refs;
|
|
|
1969 short cls_def_cnt;
|
|
|
1970 short cat_def_cnt;
|
|
|
1971 void *defs[cls_def_cnt + cat_def_cnt];
|
|
|
1972 }; */
|
|
|
1973
|
|
|
1974 static void
|
|
|
1975 build_objc_symtab_template (void)
|
|
|
1976 {
|
|
|
1977 tree fields, array_type, *chain = NULL;
|
|
|
1978 int index;
|
|
|
1979
|
|
|
1980 objc_symtab_template = objc_start_struct (get_identifier (UTAG_SYMTAB));
|
|
|
1981
|
|
|
1982 /* long sel_ref_cnt; */
|
|
|
1983 fields = add_field_decl (long_integer_type_node, "sel_ref_cnt", &chain);
|
|
|
1984
|
|
|
1985 /* SEL *refs; */
|
|
|
1986 add_field_decl (build_pointer_type (objc_selector_type), "refs", &chain);
|
|
|
1987
|
|
|
1988 /* short cls_def_cnt; */
|
|
|
1989 add_field_decl (short_integer_type_node, "cls_def_cnt", &chain);
|
|
|
1990
|
|
|
1991 /* short cat_def_cnt; */
|
|
|
1992 add_field_decl (short_integer_type_node, "cat_def_cnt", &chain);
|
|
|
1993
|
|
|
1994 /* Note that padding will be added here on LP64. */
|
|
|
1995
|
|
|
1996 /* void *defs[imp_count + cat_count (+ 1)]; */
|
|
|
1997 /* NB: The index is one less than the size of the array. */
|
|
|
1998 index = imp_count + cat_count;
|
|
|
1999 array_type = build_sized_array_type (ptr_type_node, index + 1);
|
|
|
2000 add_field_decl (array_type, "defs", &chain);
|
|
|
2001
|
|
|
2002 objc_finish_struct (objc_symtab_template, fields);
|
|
|
2003 }
|
|
|
2004 /* Construct the initial value for all of _objc_symtab. */
|
|
|
2005
|
|
|
2006 static tree
|
|
|
2007 init_objc_symtab (tree type)
|
|
|
2008 {
|
|
|
2009 tree field, expr, ltyp;
|
|
|
2010 location_t loc;
|
|
|
2011 vec<constructor_elt, va_gc> *v = NULL;
|
|
|
2012
|
|
|
2013 loc = UNKNOWN_LOCATION;
|
|
|
2014
|
|
|
2015 /* sel_ref_cnt = { ..., 5, ... } */
|
|
|
2016
|
|
|
2017 CONSTRUCTOR_APPEND_ELT (v, NULL_TREE,
|
|
|
2018 build_int_cst (long_integer_type_node, 0));
|
|
|
2019
|
|
|
2020 /* refs = { ..., _OBJC_SELECTOR_TABLE, ... } */
|
|
|
2021
|
|
|
2022 ltyp = build_pointer_type (objc_selector_type);
|
|
|
2023 if (sel_ref_chain)
|
|
|
2024 expr = convert (ltyp, build_unary_op (loc, ADDR_EXPR,
|
|
|
2025 UOBJC_SELECTOR_TABLE_decl, 1));
|
|
|
2026 else
|
|
|
2027 expr = convert (ltyp, null_pointer_node);
|
|
|
2028 CONSTRUCTOR_APPEND_ELT (v, NULL_TREE, expr);
|
|
|
2029
|
|
|
2030 /* cls_def_cnt = { ..., 5, ... } */
|
|
|
2031
|
|
|
2032 CONSTRUCTOR_APPEND_ELT (v, NULL_TREE,
|
|
|
2033 build_int_cst (short_integer_type_node, imp_count));
|
|
|
2034
|
|
|
2035 /* cat_def_cnt = { ..., 5, ... } */
|
|
|
2036
|
|
|
2037 CONSTRUCTOR_APPEND_ELT (v, NULL_TREE,
|
|
|
2038 build_int_cst (short_integer_type_node, cat_count));
|
|
|
2039
|
|
|
2040 /* cls_def = { ..., { &Foo, &Bar, ...}, ... } */
|
|
|
2041
|
|
|
2042 field = TYPE_FIELDS (type);
|
|
|
2043 field = DECL_CHAIN (DECL_CHAIN (DECL_CHAIN (DECL_CHAIN (field))));
|
|
|
2044
|
|
|
2045 CONSTRUCTOR_APPEND_ELT (v, NULL_TREE, init_def_list (TREE_TYPE (field)));
|
|
|
2046
|
|
|
2047 return objc_build_constructor (type, v);
|
|
|
2048 }
|
|
|
2049
|
|
|
2050 /* Create the declaration of _OBJC_SYMBOLS, with type `struct _objc_symtab'
|
|
|
2051 and initialized appropriately. */
|
|
|
2052
|
|
|
2053 static void
|
|
|
2054 generate_objc_symtab_decl (void)
|
|
|
2055 {
|
|
|
2056 build_objc_symtab_template ();
|
|
|
2057 UOBJC_SYMBOLS_decl = start_var_decl (objc_symtab_template, "_OBJC_SYMBOLS");
|
|
|
2058 OBJCMETA (UOBJC_SYMBOLS_decl, objc_meta, meta_base);
|
|
|
2059 finish_var_decl (UOBJC_SYMBOLS_decl,
|
|
|
2060 init_objc_symtab (TREE_TYPE (UOBJC_SYMBOLS_decl)));
|
|
|
2061 }
|
|
|
2062
|
|
|
2063 static void
|
|
|
2064 objc_generate_v1_gnu_metadata (void)
|
|
|
2065 {
|
|
|
2066 struct imp_entry *impent;
|
|
|
2067 tree chain;
|
|
|
2068
|
|
|
2069 /* Process the static instances here because initialization of objc_symtab
|
|
|
2070 depends on them. */
|
|
|
2071 if (objc_static_instances)
|
|
|
2072 generate_static_references ();
|
|
|
2073
|
|
|
2074 objc_implementation_context =
|
|
|
2075 implementation_template =
|
|
|
2076 UOBJC_CLASS_decl =
|
|
|
2077 UOBJC_METACLASS_decl = NULL_TREE;
|
|
|
2078
|
|
|
2079 for (impent = imp_list; impent; impent = impent->next)
|
|
|
2080 {
|
|
|
2081 /* If -gen-decls is present, Dump the @interface of each class.
|
|
|
2082 TODO: Dump the classes in the order they were found, rather than in
|
|
|
2083 reverse order as we are doing now. */
|
|
|
2084 if (flag_gen_declaration)
|
|
|
2085 dump_interface (gen_declaration_file, impent->imp_context);
|
|
|
2086
|
|
|
2087 /* all of the following reference the string pool... */
|
|
|
2088 if (TREE_CODE (impent->imp_context) == CLASS_IMPLEMENTATION_TYPE)
|
|
|
2089 generate_class_structures (impent);
|
|
|
2090 else
|
|
|
2091 generate_category (impent);
|
|
|
2092 }
|
|
|
2093
|
|
|
2094 /* If we are using an array of selectors, we must always
|
|
|
2095 finish up the array decl even if no selectors were used. */
|
|
|
2096 build_gnu_selector_translation_table ();
|
|
|
2097
|
|
|
2098 if (protocol_chain)
|
|
|
2099 generate_protocols ();
|
|
|
2100
|
|
|
2101 /* Arrange for ObjC data structures to be initialized at run time. */
|
|
|
2102 /* FIXME: Have some more elegant way to determine if we need to
|
|
|
2103 generate objc_symtab_decl or not, instead of checking these
|
|
|
2104 global symbols. */
|
|
|
2105 if (imp_list || class_names_chain
|
|
|
2106 || meth_var_names_chain || meth_var_types_chain || sel_ref_chain
|
|
|
2107 || prop_names_attr_chain)
|
|
|
2108 generate_objc_symtab_decl ();
|
|
|
2109
|
|
|
2110 if (imp_list || class_names_chain || objc_static_instances
|
|
|
2111 || meth_var_names_chain || meth_var_types_chain || sel_ref_chain)
|
|
|
2112 {
|
|
|
2113 /* Make sure that the meta-data are identified as being
|
|
|
2114 GNU-runtime. */
|
|
|
2115 build_module_descriptor (OBJC_VERSION,
|
|
|
2116 build_tree_list (objc_meta, meta_base));
|
|
|
2117 build_module_initializer_routine ();
|
|
|
2118 }
|
|
|
2119
|
|
|
2120 /* Dump the class references. This forces the appropriate classes
|
|
|
2121 to be linked into the executable image, preserving unix archive
|
|
|
2122 semantics. This can be removed when we move to a more dynamically
|
|
|
2123 linked environment. */
|
|
|
2124
|
|
|
2125 for (chain = cls_ref_chain; chain; chain = TREE_CHAIN (chain))
|
|
|
2126 {
|
|
|
2127 handle_class_ref (chain);
|
|
|
2128 if (TREE_PURPOSE (chain))
|
|
|
2129 generate_classref_translation_entry (chain);
|
|
|
2130 }
|
|
|
2131
|
|
|
2132 for (impent = imp_list; impent; impent = impent->next)
|
|
|
2133 handle_impent (impent);
|
|
|
2134
|
|
|
2135 generate_strings ();
|
|
|
2136 }
|
|
|
2137
|
|
|
2138 /* --- exceptions --- */
|
|
|
2139
|
|
|
2140 static GTY(()) tree objc_eh_personality_decl;
|
|
|
2141
|
|
|
2142 static tree
|
|
|
2143 objc_eh_runtime_type (tree type)
|
|
|
2144 {
|
|
|
2145 tree ident, eh_id, decl, str;
|
|
|
2146
|
|
|
2147 if (type == error_mark_node
|
|
|
2148 || errorcount || sorrycount)
|
|
|
2149 {
|
|
|
2150 /* Use 'ErrorMarkNode' as class name when error_mark_node is found
|
|
|
2151 to prevent an ICE. Note that we know that the compiler will
|
|
|
2152 terminate with an error and this 'ErrorMarkNode' class name will
|
|
|
2153 never be actually used. */
|
|
|
2154 ident = get_identifier ("ErrorMarkNode");
|
|
|
2155 goto make_err_class;
|
|
|
2156 }
|
|
|
2157
|
|
|
2158 if (POINTER_TYPE_P (type) && objc_is_object_id (TREE_TYPE (type)))
|
|
|
2159 /* We don't want to identify 'id' for GNU. Instead, build a 0
|
|
|
2160 entry in the exceptions table. */
|
|
|
2161 return null_pointer_node;
|
|
|
2162
|
|
|
2163 if (!POINTER_TYPE_P (type) || !TYPED_OBJECT (TREE_TYPE (type)))
|
|
|
2164 {
|
|
|
2165 #ifdef OBJCPLUS
|
|
|
2166 /* This routine is also called for c++ catch clauses; in which case,
|
|
|
2167 we use the c++ typeinfo decl. */
|
|
|
2168 return build_eh_type_type (type);
|
|
|
2169 #else
|
|
|
2170 error ("non-objective-c type %qT cannot be caught", type);
|
|
|
2171 ident = get_identifier ("ErrorMarkNode");
|
|
|
2172 goto make_err_class;
|
|
|
2173 #endif
|
|
|
2174 }
|
|
|
2175 else
|
|
|
2176 ident = OBJC_TYPE_NAME (TREE_TYPE (type));
|
|
|
2177
|
|
|
2178 make_err_class:
|
|
|
2179 /* If this class was already referenced, then it will be output during
|
|
|
2180 meta-data emission, so we don't need to do it here. */
|
|
|
2181 decl = get_objc_string_decl (ident, class_names);
|
|
|
2182 eh_id = add_objc_string (ident, class_names);
|
|
|
2183 if (!decl)
|
|
|
2184 {
|
|
|
2185 /* Not found ... so we need to build it - from the freshly-entered id. */
|
|
|
2186 decl = get_objc_string_decl (ident, class_names);
|
|
|
2187 str = my_build_string (IDENTIFIER_LENGTH (ident) + 1,
|
|
|
2188 IDENTIFIER_POINTER (ident));
|
|
|
2189 /* We have to finalize this var here, because this might be called after
|
|
|
2190 all the other metadata strings have been emitted. */
|
|
|
2191 finish_var_decl (decl, str);
|
|
|
2192 }
|
|
|
2193 return eh_id;
|
|
|
2194 }
|
|
|
2195
|
|
|
2196 static tree
|
|
|
2197 objc_eh_personality (void)
|
|
|
2198 {
|
|
|
2199 if (!objc_eh_personality_decl)
|
|
|
2200 #ifndef OBJCPLUS
|
|
|
2201 objc_eh_personality_decl = build_personality_function ("gnu_objc");
|
|
|
2202 #else
|
|
|
2203 objc_eh_personality_decl = build_personality_function ("gxx");
|
|
|
2204 #endif
|
|
|
2205 return objc_eh_personality_decl;
|
|
|
2206 }
|
|
|
2207
|
|
|
2208 /* -- interfaces --- */
|
|
|
2209
|
|
|
2210 static tree
|
|
|
2211 build_throw_stmt (location_t loc, tree throw_expr, bool rethrown ATTRIBUTE_UNUSED)
|
|
|
2212 {
|
|
|
2213 tree t;
|
|
|
2214 vec<tree, va_gc> *parms;
|
|
|
2215 vec_alloc (parms, 1);
|
|
|
2216 /* A throw is just a call to the runtime throw function with the
|
|
|
2217 object as a parameter. */
|
|
|
2218 parms->quick_push (throw_expr);
|
|
|
2219 t = build_function_call_vec (loc, vNULL, objc_exception_throw_decl, parms,
|
|
|
2220 NULL);
|
|
|
2221 vec_free (parms);
|
|
|
2222 return add_stmt (t);
|
|
|
2223 }
|
|
|
2224
|
|
|
2225 /* Build __builtin_eh_pointer. */
|
|
|
2226
|
|
|
2227 static tree
|
|
|
2228 objc_build_exc_ptr (struct objc_try_context **x ATTRIBUTE_UNUSED)
|
|
|
2229 {
|
|
|
2230 tree t;
|
|
|
2231 t = builtin_decl_explicit (BUILT_IN_EH_POINTER);
|
|
|
2232 t = build_call_expr (t, 1, integer_zero_node);
|
|
|
2233 return fold_convert (objc_object_type, t);
|
|
|
2234 }
|
|
|
2235
|
|
|
2236 static tree
|
|
|
2237 begin_catch (struct objc_try_context **cur_try_context, tree type,
|
|
|
2238 tree decl, tree compound, bool ellipsis ATTRIBUTE_UNUSED)
|
|
|
2239 {
|
|
|
2240 tree t;
|
|
|
2241 /* Record the data for the catch in the try context so that we can
|
|
|
2242 finalize it later. */
|
|
|
2243 if (ellipsis)
|
|
|
2244 t = build_stmt (input_location, CATCH_EXPR, NULL, compound);
|
|
|
2245 else
|
|
|
2246 t = build_stmt (input_location, CATCH_EXPR, type, compound);
|
|
|
2247 (*cur_try_context)->current_catch = t;
|
|
|
2248
|
|
|
2249 /* Initialize the decl from the EXC_PTR_EXPR we get from the runtime. */
|
|
|
2250 t = objc_build_exc_ptr (cur_try_context);
|
|
|
2251 t = convert (TREE_TYPE (decl), t);
|
|
|
2252 return build2 (MODIFY_EXPR, void_type_node, decl, t);
|
|
|
2253 }
|
|
|
2254
|
|
|
2255 static void
|
|
|
2256 finish_catch (struct objc_try_context **cur_try_context, tree current_catch)
|
|
|
2257 {
|
|
|
2258 append_to_statement_list (current_catch, &((*cur_try_context)->catch_list));
|
|
|
2259 }
|
|
|
2260
|
|
|
2261 static tree
|
|
|
2262 finish_try_stmt (struct objc_try_context **cur_try_context)
|
|
|
2263 {
|
|
|
2264 struct objc_try_context *c = *cur_try_context;
|
|
|
2265 tree stmt = c->try_body;
|
|
|
2266 if (c->catch_list)
|
|
|
2267 stmt = build_stmt (c->try_locus, TRY_CATCH_EXPR, stmt, c->catch_list);
|
|
|
2268 if (c->finally_body)
|
|
|
2269 stmt = build_stmt (c->try_locus, TRY_FINALLY_EXPR, stmt, c->finally_body);
|
|
|
2270 return stmt;
|
|
|
2271 }
|
|
|
2272
|
|
|
2273 #include "gt-objc-objc-gnu-runtime-abi-01.h"
|
