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913979bede
Prior to this commit, we were reading and writing ivar index and shape ID in inline caches in two separate instructions when getting and setting ivars. This meant there was a race condition with ractors and these caches where one ractor could change a value in the cache while another was still reading from it. This commit instead reads and writes shape ID and ivar index to inline caches atomically so there is no longer a race condition. Co-Authored-By: Aaron Patterson <tenderlove@ruby-lang.org> Co-Authored-By: John Hawthorn <john@hawthorn.email>
3901 lines
98 KiB
C
3901 lines
98 KiB
C
/**********************************************************************
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variable.c -
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$Author$
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created at: Tue Apr 19 23:55:15 JST 1994
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Copyright (C) 1993-2007 Yukihiro Matsumoto
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Copyright (C) 2000 Network Applied Communication Laboratory, Inc.
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Copyright (C) 2000 Information-technology Promotion Agency, Japan
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**********************************************************************/
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#include "ruby/internal/config.h"
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#include <stddef.h>
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#include "ruby/internal/stdbool.h"
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#include "ccan/list/list.h"
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#include "constant.h"
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#include "debug_counter.h"
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#include "id.h"
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#include "id_table.h"
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#include "internal.h"
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#include "internal/class.h"
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#include "internal/compilers.h"
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#include "internal/error.h"
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#include "internal/eval.h"
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#include "internal/hash.h"
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#include "internal/object.h"
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#include "internal/re.h"
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#include "internal/symbol.h"
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#include "internal/thread.h"
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#include "internal/variable.h"
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#include "ruby/encoding.h"
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#include "ruby/st.h"
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#include "ruby/util.h"
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#include "transient_heap.h"
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#include "shape.h"
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#include "variable.h"
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#include "vm_core.h"
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#include "ractor_core.h"
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#include "vm_sync.h"
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RUBY_EXTERN rb_serial_t ruby_vm_global_cvar_state;
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#define GET_GLOBAL_CVAR_STATE() (ruby_vm_global_cvar_state)
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typedef void rb_gvar_compact_t(void *var);
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static struct rb_id_table *rb_global_tbl;
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static ID autoload, classpath, tmp_classpath;
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// This hash table maps file paths to loadable features. We use this to track
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// autoload state until it's no longer needed.
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// feature (file path) => struct autoload_data
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static VALUE autoload_features;
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// This mutex is used to protect autoloading state. We use a global mutex which
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// is held until a per-feature mutex can be created. This ensures there are no
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// race conditions relating to autoload state.
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static VALUE autoload_mutex;
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static void check_before_mod_set(VALUE, ID, VALUE, const char *);
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static void setup_const_entry(rb_const_entry_t *, VALUE, VALUE, rb_const_flag_t);
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static VALUE rb_const_search(VALUE klass, ID id, int exclude, int recurse, int visibility);
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static st_table *generic_iv_tbl_;
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struct ivar_update {
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struct gen_ivtbl *ivtbl;
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uint32_t iv_index;
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rb_shape_t* shape;
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};
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void
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Init_var_tables(void)
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{
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rb_global_tbl = rb_id_table_create(0);
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generic_iv_tbl_ = st_init_numtable();
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autoload = rb_intern_const("__autoload__");
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/* __classpath__: fully qualified class path */
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classpath = rb_intern_const("__classpath__");
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/* __tmp_classpath__: temporary class path which contains anonymous names */
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tmp_classpath = rb_intern_const("__tmp_classpath__");
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autoload_mutex = rb_mutex_new();
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rb_obj_hide(autoload_mutex);
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rb_gc_register_mark_object(autoload_mutex);
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autoload_features = rb_ident_hash_new();
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rb_obj_hide(autoload_features);
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rb_gc_register_mark_object(autoload_features);
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}
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static inline bool
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rb_namespace_p(VALUE obj)
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{
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if (RB_SPECIAL_CONST_P(obj)) return false;
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switch (RB_BUILTIN_TYPE(obj)) {
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case T_MODULE: case T_CLASS: return true;
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default: break;
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}
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return false;
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}
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/**
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* Returns +classpath+ of _klass_, if it is named, or +nil+ for
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* anonymous +class+/+module+. A named +classpath+ may contain
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* an anonymous component, but the last component is guaranteed
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* to not be anonymous. <code>*permanent</code> is set to 1
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* if +classpath+ has no anonymous components. There is no builtin
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* Ruby level APIs that can change a permanent +classpath+.
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*/
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static VALUE
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classname(VALUE klass, int *permanent)
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{
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st_table *ivtbl;
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st_data_t n;
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*permanent = 0;
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if (!RCLASS_EXT(klass)) return Qnil;
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if (!(ivtbl = RCLASS_IV_TBL(klass))) return Qnil;
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if (st_lookup(ivtbl, (st_data_t)classpath, &n)) {
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*permanent = 1;
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return (VALUE)n;
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}
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if (st_lookup(ivtbl, (st_data_t)tmp_classpath, &n)) return (VALUE)n;
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return Qnil;
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}
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/*
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* call-seq:
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* mod.name -> string
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*
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* Returns the name of the module <i>mod</i>. Returns nil for anonymous modules.
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*/
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VALUE
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rb_mod_name(VALUE mod)
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{
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int permanent;
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return classname(mod, &permanent);
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}
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static VALUE
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make_temporary_path(VALUE obj, VALUE klass)
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{
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VALUE path;
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switch (klass) {
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case Qnil:
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path = rb_sprintf("#<Class:%p>", (void*)obj);
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break;
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case Qfalse:
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path = rb_sprintf("#<Module:%p>", (void*)obj);
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break;
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default:
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path = rb_sprintf("#<%"PRIsVALUE":%p>", klass, (void*)obj);
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break;
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}
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OBJ_FREEZE(path);
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return path;
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}
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typedef VALUE (*fallback_func)(VALUE obj, VALUE name);
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static VALUE
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rb_tmp_class_path(VALUE klass, int *permanent, fallback_func fallback)
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{
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VALUE path = classname(klass, permanent);
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if (!NIL_P(path)) {
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return path;
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}
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else {
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if (RB_TYPE_P(klass, T_MODULE)) {
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if (rb_obj_class(klass) == rb_cModule) {
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path = Qfalse;
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}
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else {
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int perm;
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path = rb_tmp_class_path(RBASIC(klass)->klass, &perm, fallback);
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}
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}
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*permanent = 0;
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return fallback(klass, path);
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}
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}
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VALUE
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rb_class_path(VALUE klass)
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{
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int permanent;
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VALUE path = rb_tmp_class_path(klass, &permanent, make_temporary_path);
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if (!NIL_P(path)) path = rb_str_dup(path);
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return path;
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}
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VALUE
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rb_class_path_cached(VALUE klass)
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{
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return rb_mod_name(klass);
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}
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static VALUE
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no_fallback(VALUE obj, VALUE name)
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{
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return name;
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}
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VALUE
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rb_search_class_path(VALUE klass)
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{
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int permanent;
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return rb_tmp_class_path(klass, &permanent, no_fallback);
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}
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static VALUE
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build_const_pathname(VALUE head, VALUE tail)
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{
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VALUE path = rb_str_dup(head);
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rb_str_cat2(path, "::");
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rb_str_append(path, tail);
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return rb_fstring(path);
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}
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static VALUE
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build_const_path(VALUE head, ID tail)
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{
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return build_const_pathname(head, rb_id2str(tail));
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}
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void
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rb_set_class_path_string(VALUE klass, VALUE under, VALUE name)
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{
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VALUE str;
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ID pathid = classpath;
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if (under == rb_cObject) {
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str = rb_str_new_frozen(name);
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}
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else {
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int permanent;
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str = rb_tmp_class_path(under, &permanent, make_temporary_path);
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str = build_const_pathname(str, name);
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if (!permanent) {
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pathid = tmp_classpath;
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}
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}
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rb_ivar_set(klass, pathid, str);
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}
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void
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rb_set_class_path(VALUE klass, VALUE under, const char *name)
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{
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VALUE str = rb_str_new2(name);
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OBJ_FREEZE(str);
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rb_set_class_path_string(klass, under, str);
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}
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VALUE
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rb_path_to_class(VALUE pathname)
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{
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rb_encoding *enc = rb_enc_get(pathname);
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const char *pbeg, *pend, *p, *path = RSTRING_PTR(pathname);
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ID id;
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VALUE c = rb_cObject;
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if (!rb_enc_asciicompat(enc)) {
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rb_raise(rb_eArgError, "invalid class path encoding (non ASCII)");
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}
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pbeg = p = path;
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pend = path + RSTRING_LEN(pathname);
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if (path == pend || path[0] == '#') {
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rb_raise(rb_eArgError, "can't retrieve anonymous class %"PRIsVALUE,
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QUOTE(pathname));
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}
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while (p < pend) {
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while (p < pend && *p != ':') p++;
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id = rb_check_id_cstr(pbeg, p-pbeg, enc);
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if (p < pend && p[0] == ':') {
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if ((size_t)(pend - p) < 2 || p[1] != ':') goto undefined_class;
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p += 2;
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pbeg = p;
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}
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if (!id) {
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goto undefined_class;
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}
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c = rb_const_search(c, id, TRUE, FALSE, FALSE);
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if (c == Qundef) goto undefined_class;
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if (!rb_namespace_p(c)) {
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rb_raise(rb_eTypeError, "%"PRIsVALUE" does not refer to class/module",
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pathname);
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}
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}
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RB_GC_GUARD(pathname);
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return c;
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undefined_class:
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rb_raise(rb_eArgError, "undefined class/module % "PRIsVALUE,
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rb_str_subseq(pathname, 0, p-path));
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UNREACHABLE_RETURN(Qundef);
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}
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VALUE
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rb_path2class(const char *path)
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{
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return rb_path_to_class(rb_str_new_cstr(path));
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}
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VALUE
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rb_class_name(VALUE klass)
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{
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return rb_class_path(rb_class_real(klass));
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}
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const char *
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rb_class2name(VALUE klass)
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{
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int permanent;
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VALUE path = rb_tmp_class_path(rb_class_real(klass), &permanent, make_temporary_path);
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if (NIL_P(path)) return NULL;
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return RSTRING_PTR(path);
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}
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const char *
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rb_obj_classname(VALUE obj)
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{
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return rb_class2name(CLASS_OF(obj));
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}
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struct trace_var {
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int removed;
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void (*func)(VALUE arg, VALUE val);
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VALUE data;
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struct trace_var *next;
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};
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struct rb_global_variable {
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int counter;
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int block_trace;
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VALUE *data;
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rb_gvar_getter_t *getter;
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rb_gvar_setter_t *setter;
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rb_gvar_marker_t *marker;
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rb_gvar_compact_t *compactor;
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struct trace_var *trace;
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};
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struct rb_global_entry {
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struct rb_global_variable *var;
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ID id;
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bool ractor_local;
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};
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static struct rb_global_entry*
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rb_find_global_entry(ID id)
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{
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struct rb_global_entry *entry;
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VALUE data;
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if (!rb_id_table_lookup(rb_global_tbl, id, &data)) {
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entry = NULL;
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}
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else {
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entry = (struct rb_global_entry *)data;
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RUBY_ASSERT(entry != NULL);
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}
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if (UNLIKELY(!rb_ractor_main_p()) && (!entry || !entry->ractor_local)) {
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rb_raise(rb_eRactorIsolationError, "can not access global variables %s from non-main Ractors", rb_id2name(id));
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}
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return entry;
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}
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void
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rb_gvar_ractor_local(const char *name)
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{
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struct rb_global_entry *entry = rb_find_global_entry(rb_intern(name));
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entry->ractor_local = true;
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}
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|
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static void
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|
rb_gvar_undef_compactor(void *var)
|
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{
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|
}
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|
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static struct rb_global_entry*
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rb_global_entry(ID id)
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{
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struct rb_global_entry *entry = rb_find_global_entry(id);
|
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if (!entry) {
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struct rb_global_variable *var;
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entry = ALLOC(struct rb_global_entry);
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var = ALLOC(struct rb_global_variable);
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entry->id = id;
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entry->var = var;
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entry->ractor_local = false;
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var->counter = 1;
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var->data = 0;
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var->getter = rb_gvar_undef_getter;
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var->setter = rb_gvar_undef_setter;
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var->marker = rb_gvar_undef_marker;
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var->compactor = rb_gvar_undef_compactor;
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var->block_trace = 0;
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var->trace = 0;
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rb_id_table_insert(rb_global_tbl, id, (VALUE)entry);
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}
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return entry;
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}
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VALUE
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rb_gvar_undef_getter(ID id, VALUE *_)
|
|
{
|
|
rb_warning("global variable `%"PRIsVALUE"' not initialized", QUOTE_ID(id));
|
|
|
|
return Qnil;
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|
}
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|
|
|
static void
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|
rb_gvar_val_compactor(void *_var)
|
|
{
|
|
struct rb_global_variable *var = (struct rb_global_variable *)_var;
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|
VALUE obj = (VALUE)var->data;
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|
|
|
if (obj) {
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|
VALUE new = rb_gc_location(obj);
|
|
if (new != obj) {
|
|
var->data = (void*)new;
|
|
}
|
|
}
|
|
}
|
|
|
|
void
|
|
rb_gvar_undef_setter(VALUE val, ID id, VALUE *_)
|
|
{
|
|
struct rb_global_variable *var = rb_global_entry(id)->var;
|
|
var->getter = rb_gvar_val_getter;
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|
var->setter = rb_gvar_val_setter;
|
|
var->marker = rb_gvar_val_marker;
|
|
var->compactor = rb_gvar_val_compactor;
|
|
|
|
var->data = (void*)val;
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|
}
|
|
|
|
void
|
|
rb_gvar_undef_marker(VALUE *var)
|
|
{
|
|
}
|
|
|
|
VALUE
|
|
rb_gvar_val_getter(ID id, VALUE *data)
|
|
{
|
|
return (VALUE)data;
|
|
}
|
|
|
|
void
|
|
rb_gvar_val_setter(VALUE val, ID id, VALUE *_)
|
|
{
|
|
struct rb_global_variable *var = rb_global_entry(id)->var;
|
|
var->data = (void*)val;
|
|
}
|
|
|
|
void
|
|
rb_gvar_val_marker(VALUE *var)
|
|
{
|
|
VALUE data = (VALUE)var;
|
|
if (data) rb_gc_mark_movable(data);
|
|
}
|
|
|
|
VALUE
|
|
rb_gvar_var_getter(ID id, VALUE *var)
|
|
{
|
|
if (!var) return Qnil;
|
|
return *var;
|
|
}
|
|
|
|
void
|
|
rb_gvar_var_setter(VALUE val, ID id, VALUE *data)
|
|
{
|
|
*data = val;
|
|
}
|
|
|
|
void
|
|
rb_gvar_var_marker(VALUE *var)
|
|
{
|
|
if (var) rb_gc_mark_maybe(*var);
|
|
}
|
|
|
|
void
|
|
rb_gvar_readonly_setter(VALUE v, ID id, VALUE *_)
|
|
{
|
|
rb_name_error(id, "%"PRIsVALUE" is a read-only variable", QUOTE_ID(id));
|
|
}
|
|
|
|
static enum rb_id_table_iterator_result
|
|
mark_global_entry(VALUE v, void *ignored)
|
|
{
|
|
struct rb_global_entry *entry = (struct rb_global_entry *)v;
|
|
struct trace_var *trace;
|
|
struct rb_global_variable *var = entry->var;
|
|
|
|
(*var->marker)(var->data);
|
|
trace = var->trace;
|
|
while (trace) {
|
|
if (trace->data) rb_gc_mark_maybe(trace->data);
|
|
trace = trace->next;
|
|
}
|
|
return ID_TABLE_CONTINUE;
|
|
}
|
|
|
|
void
|
|
rb_gc_mark_global_tbl(void)
|
|
{
|
|
if (rb_global_tbl) {
|
|
rb_id_table_foreach_values(rb_global_tbl, mark_global_entry, 0);
|
|
}
|
|
}
|
|
|
|
static enum rb_id_table_iterator_result
|
|
update_global_entry(VALUE v, void *ignored)
|
|
{
|
|
struct rb_global_entry *entry = (struct rb_global_entry *)v;
|
|
struct rb_global_variable *var = entry->var;
|
|
|
|
(*var->compactor)(var);
|
|
return ID_TABLE_CONTINUE;
|
|
}
|
|
|
|
void
|
|
rb_gc_update_global_tbl(void)
|
|
{
|
|
if (rb_global_tbl) {
|
|
rb_id_table_foreach_values(rb_global_tbl, update_global_entry, 0);
|
|
}
|
|
}
|
|
|
|
static ID
|
|
global_id(const char *name)
|
|
{
|
|
ID id;
|
|
|
|
if (name[0] == '$') id = rb_intern(name);
|
|
else {
|
|
size_t len = strlen(name);
|
|
VALUE vbuf = 0;
|
|
char *buf = ALLOCV_N(char, vbuf, len+1);
|
|
buf[0] = '$';
|
|
memcpy(buf+1, name, len);
|
|
id = rb_intern2(buf, len+1);
|
|
ALLOCV_END(vbuf);
|
|
}
|
|
return id;
|
|
}
|
|
|
|
static ID
|
|
find_global_id(const char *name)
|
|
{
|
|
ID id;
|
|
size_t len = strlen(name);
|
|
|
|
if (name[0] == '$') {
|
|
id = rb_check_id_cstr(name, len, NULL);
|
|
}
|
|
else {
|
|
VALUE vbuf = 0;
|
|
char *buf = ALLOCV_N(char, vbuf, len+1);
|
|
buf[0] = '$';
|
|
memcpy(buf+1, name, len);
|
|
id = rb_check_id_cstr(buf, len+1, NULL);
|
|
ALLOCV_END(vbuf);
|
|
}
|
|
|
|
return id;
|
|
}
|
|
|
|
void
|
|
rb_define_hooked_variable(
|
|
const char *name,
|
|
VALUE *var,
|
|
rb_gvar_getter_t *getter,
|
|
rb_gvar_setter_t *setter)
|
|
{
|
|
volatile VALUE tmp = var ? *var : Qnil;
|
|
ID id = global_id(name);
|
|
struct rb_global_variable *gvar = rb_global_entry(id)->var;
|
|
|
|
gvar->data = (void*)var;
|
|
gvar->getter = getter ? (rb_gvar_getter_t *)getter : rb_gvar_var_getter;
|
|
gvar->setter = setter ? (rb_gvar_setter_t *)setter : rb_gvar_var_setter;
|
|
gvar->marker = rb_gvar_var_marker;
|
|
|
|
RB_GC_GUARD(tmp);
|
|
}
|
|
|
|
void
|
|
rb_define_variable(const char *name, VALUE *var)
|
|
{
|
|
rb_define_hooked_variable(name, var, 0, 0);
|
|
}
|
|
|
|
void
|
|
rb_define_readonly_variable(const char *name, const VALUE *var)
|
|
{
|
|
rb_define_hooked_variable(name, (VALUE *)var, 0, rb_gvar_readonly_setter);
|
|
}
|
|
|
|
void
|
|
rb_define_virtual_variable(
|
|
const char *name,
|
|
rb_gvar_getter_t *getter,
|
|
rb_gvar_setter_t *setter)
|
|
{
|
|
if (!getter) getter = rb_gvar_val_getter;
|
|
if (!setter) setter = rb_gvar_readonly_setter;
|
|
rb_define_hooked_variable(name, 0, getter, setter);
|
|
}
|
|
|
|
static void
|
|
rb_trace_eval(VALUE cmd, VALUE val)
|
|
{
|
|
rb_eval_cmd_kw(cmd, rb_ary_new3(1, val), RB_NO_KEYWORDS);
|
|
}
|
|
|
|
VALUE
|
|
rb_f_trace_var(int argc, const VALUE *argv)
|
|
{
|
|
VALUE var, cmd;
|
|
struct rb_global_entry *entry;
|
|
struct trace_var *trace;
|
|
|
|
if (rb_scan_args(argc, argv, "11", &var, &cmd) == 1) {
|
|
cmd = rb_block_proc();
|
|
}
|
|
if (NIL_P(cmd)) {
|
|
return rb_f_untrace_var(argc, argv);
|
|
}
|
|
entry = rb_global_entry(rb_to_id(var));
|
|
trace = ALLOC(struct trace_var);
|
|
trace->next = entry->var->trace;
|
|
trace->func = rb_trace_eval;
|
|
trace->data = cmd;
|
|
trace->removed = 0;
|
|
entry->var->trace = trace;
|
|
|
|
return Qnil;
|
|
}
|
|
|
|
static void
|
|
remove_trace(struct rb_global_variable *var)
|
|
{
|
|
struct trace_var *trace = var->trace;
|
|
struct trace_var t;
|
|
struct trace_var *next;
|
|
|
|
t.next = trace;
|
|
trace = &t;
|
|
while (trace->next) {
|
|
next = trace->next;
|
|
if (next->removed) {
|
|
trace->next = next->next;
|
|
xfree(next);
|
|
}
|
|
else {
|
|
trace = next;
|
|
}
|
|
}
|
|
var->trace = t.next;
|
|
}
|
|
|
|
VALUE
|
|
rb_f_untrace_var(int argc, const VALUE *argv)
|
|
{
|
|
VALUE var, cmd;
|
|
ID id;
|
|
struct rb_global_entry *entry;
|
|
struct trace_var *trace;
|
|
|
|
rb_scan_args(argc, argv, "11", &var, &cmd);
|
|
id = rb_check_id(&var);
|
|
if (!id) {
|
|
rb_name_error_str(var, "undefined global variable %"PRIsVALUE"", QUOTE(var));
|
|
}
|
|
if ((entry = rb_find_global_entry(id)) == NULL) {
|
|
rb_name_error(id, "undefined global variable %"PRIsVALUE"", QUOTE_ID(id));
|
|
}
|
|
|
|
trace = entry->var->trace;
|
|
if (NIL_P(cmd)) {
|
|
VALUE ary = rb_ary_new();
|
|
|
|
while (trace) {
|
|
struct trace_var *next = trace->next;
|
|
rb_ary_push(ary, (VALUE)trace->data);
|
|
trace->removed = 1;
|
|
trace = next;
|
|
}
|
|
|
|
if (!entry->var->block_trace) remove_trace(entry->var);
|
|
return ary;
|
|
}
|
|
else {
|
|
while (trace) {
|
|
if (trace->data == cmd) {
|
|
trace->removed = 1;
|
|
if (!entry->var->block_trace) remove_trace(entry->var);
|
|
return rb_ary_new3(1, cmd);
|
|
}
|
|
trace = trace->next;
|
|
}
|
|
}
|
|
return Qnil;
|
|
}
|
|
|
|
struct trace_data {
|
|
struct trace_var *trace;
|
|
VALUE val;
|
|
};
|
|
|
|
static VALUE
|
|
trace_ev(VALUE v)
|
|
{
|
|
struct trace_data *data = (void *)v;
|
|
struct trace_var *trace = data->trace;
|
|
|
|
while (trace) {
|
|
(*trace->func)(trace->data, data->val);
|
|
trace = trace->next;
|
|
}
|
|
|
|
return Qnil;
|
|
}
|
|
|
|
static VALUE
|
|
trace_en(VALUE v)
|
|
{
|
|
struct rb_global_variable *var = (void *)v;
|
|
var->block_trace = 0;
|
|
remove_trace(var);
|
|
return Qnil; /* not reached */
|
|
}
|
|
|
|
static VALUE
|
|
rb_gvar_set_entry(struct rb_global_entry *entry, VALUE val)
|
|
{
|
|
struct trace_data trace;
|
|
struct rb_global_variable *var = entry->var;
|
|
|
|
(*var->setter)(val, entry->id, var->data);
|
|
|
|
if (var->trace && !var->block_trace) {
|
|
var->block_trace = 1;
|
|
trace.trace = var->trace;
|
|
trace.val = val;
|
|
rb_ensure(trace_ev, (VALUE)&trace, trace_en, (VALUE)var);
|
|
}
|
|
return val;
|
|
}
|
|
|
|
VALUE
|
|
rb_gvar_set(ID id, VALUE val)
|
|
{
|
|
struct rb_global_entry *entry;
|
|
entry = rb_global_entry(id);
|
|
|
|
return rb_gvar_set_entry(entry, val);
|
|
}
|
|
|
|
VALUE
|
|
rb_gv_set(const char *name, VALUE val)
|
|
{
|
|
return rb_gvar_set(global_id(name), val);
|
|
}
|
|
|
|
VALUE
|
|
rb_gvar_get(ID id)
|
|
{
|
|
struct rb_global_entry *entry = rb_global_entry(id);
|
|
struct rb_global_variable *var = entry->var;
|
|
return (*var->getter)(entry->id, var->data);
|
|
}
|
|
|
|
VALUE
|
|
rb_gv_get(const char *name)
|
|
{
|
|
ID id = find_global_id(name);
|
|
|
|
if (!id) {
|
|
rb_warning("global variable `%s' not initialized", name);
|
|
return Qnil;
|
|
}
|
|
|
|
return rb_gvar_get(id);
|
|
}
|
|
|
|
MJIT_FUNC_EXPORTED VALUE
|
|
rb_gvar_defined(ID id)
|
|
{
|
|
struct rb_global_entry *entry = rb_global_entry(id);
|
|
return RBOOL(entry->var->getter != rb_gvar_undef_getter);
|
|
}
|
|
|
|
rb_gvar_getter_t *
|
|
rb_gvar_getter_function_of(ID id)
|
|
{
|
|
const struct rb_global_entry *entry = rb_global_entry(id);
|
|
return entry->var->getter;
|
|
}
|
|
|
|
rb_gvar_setter_t *
|
|
rb_gvar_setter_function_of(ID id)
|
|
{
|
|
const struct rb_global_entry *entry = rb_global_entry(id);
|
|
return entry->var->setter;
|
|
}
|
|
|
|
static enum rb_id_table_iterator_result
|
|
gvar_i(ID key, VALUE val, void *a)
|
|
{
|
|
VALUE ary = (VALUE)a;
|
|
rb_ary_push(ary, ID2SYM(key));
|
|
return ID_TABLE_CONTINUE;
|
|
}
|
|
|
|
VALUE
|
|
rb_f_global_variables(void)
|
|
{
|
|
VALUE ary = rb_ary_new();
|
|
VALUE sym, backref = rb_backref_get();
|
|
|
|
if (!rb_ractor_main_p()) {
|
|
rb_raise(rb_eRactorIsolationError, "can not access global variables from non-main Ractors");
|
|
}
|
|
|
|
rb_id_table_foreach(rb_global_tbl, gvar_i, (void *)ary);
|
|
if (!NIL_P(backref)) {
|
|
char buf[2];
|
|
int i, nmatch = rb_match_count(backref);
|
|
buf[0] = '$';
|
|
for (i = 1; i <= nmatch; ++i) {
|
|
if (!rb_match_nth_defined(i, backref)) continue;
|
|
if (i < 10) {
|
|
/* probably reused, make static ID */
|
|
buf[1] = (char)(i + '0');
|
|
sym = ID2SYM(rb_intern2(buf, 2));
|
|
}
|
|
else {
|
|
/* dynamic symbol */
|
|
sym = rb_str_intern(rb_sprintf("$%d", i));
|
|
}
|
|
rb_ary_push(ary, sym);
|
|
}
|
|
}
|
|
return ary;
|
|
}
|
|
|
|
void
|
|
rb_alias_variable(ID name1, ID name2)
|
|
{
|
|
struct rb_global_entry *entry1, *entry2;
|
|
VALUE data1;
|
|
struct rb_id_table *gtbl = rb_global_tbl;
|
|
|
|
if (!rb_ractor_main_p()) {
|
|
rb_raise(rb_eRactorIsolationError, "can not access global variables from non-main Ractors");
|
|
}
|
|
|
|
entry2 = rb_global_entry(name2);
|
|
if (!rb_id_table_lookup(gtbl, name1, &data1)) {
|
|
entry1 = ALLOC(struct rb_global_entry);
|
|
entry1->id = name1;
|
|
rb_id_table_insert(gtbl, name1, (VALUE)entry1);
|
|
}
|
|
else if ((entry1 = (struct rb_global_entry *)data1)->var != entry2->var) {
|
|
struct rb_global_variable *var = entry1->var;
|
|
if (var->block_trace) {
|
|
rb_raise(rb_eRuntimeError, "can't alias in tracer");
|
|
}
|
|
var->counter--;
|
|
if (var->counter == 0) {
|
|
struct trace_var *trace = var->trace;
|
|
while (trace) {
|
|
struct trace_var *next = trace->next;
|
|
xfree(trace);
|
|
trace = next;
|
|
}
|
|
xfree(var);
|
|
}
|
|
}
|
|
else {
|
|
return;
|
|
}
|
|
entry2->var->counter++;
|
|
entry1->var = entry2->var;
|
|
}
|
|
|
|
static void
|
|
IVAR_ACCESSOR_SHOULD_BE_MAIN_RACTOR(ID id)
|
|
{
|
|
if (UNLIKELY(!rb_ractor_main_p())) {
|
|
if (rb_is_instance_id(id)) { // check only normal ivars
|
|
rb_raise(rb_eRactorIsolationError, "can not set instance variables of classes/modules by non-main Ractors");
|
|
}
|
|
}
|
|
}
|
|
|
|
#define CVAR_ACCESSOR_SHOULD_BE_MAIN_RACTOR() \
|
|
if (UNLIKELY(!rb_ractor_main_p())) { \
|
|
rb_raise(rb_eRactorIsolationError, "can not access class variables from non-main Ractors"); \
|
|
}
|
|
|
|
static inline struct st_table *
|
|
generic_ivtbl(VALUE obj, ID id, bool force_check_ractor)
|
|
{
|
|
ASSERT_vm_locking();
|
|
|
|
if ((force_check_ractor || LIKELY(rb_is_instance_id(id)) /* not internal ID */ ) &&
|
|
!RB_OBJ_FROZEN_RAW(obj) &&
|
|
UNLIKELY(!rb_ractor_main_p()) &&
|
|
UNLIKELY(rb_ractor_shareable_p(obj))) {
|
|
|
|
rb_raise(rb_eRactorIsolationError, "can not access instance variables of shareable objects from non-main Ractors");
|
|
}
|
|
return generic_iv_tbl_;
|
|
}
|
|
|
|
static inline struct st_table *
|
|
generic_ivtbl_no_ractor_check(VALUE obj)
|
|
{
|
|
return generic_ivtbl(obj, 0, false);
|
|
}
|
|
|
|
static int
|
|
gen_ivtbl_get_unlocked(VALUE obj, ID id, struct gen_ivtbl **ivtbl)
|
|
{
|
|
st_data_t data;
|
|
|
|
if (st_lookup(generic_ivtbl(obj, id, false), (st_data_t)obj, &data)) {
|
|
*ivtbl = (struct gen_ivtbl *)data;
|
|
return 1;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
MJIT_FUNC_EXPORTED int
|
|
rb_gen_ivtbl_get(VALUE obj, ID id, struct gen_ivtbl **ivtbl)
|
|
{
|
|
st_data_t data;
|
|
int r = 0;
|
|
|
|
RB_VM_LOCK_ENTER();
|
|
{
|
|
if (st_lookup(generic_ivtbl(obj, id, false), (st_data_t)obj, &data)) {
|
|
*ivtbl = (struct gen_ivtbl *)data;
|
|
r = 1;
|
|
}
|
|
}
|
|
RB_VM_LOCK_LEAVE();
|
|
|
|
return r;
|
|
}
|
|
|
|
MJIT_FUNC_EXPORTED int
|
|
rb_ivar_generic_ivtbl_lookup(VALUE obj, struct gen_ivtbl **ivtbl)
|
|
{
|
|
return rb_gen_ivtbl_get(obj, 0, ivtbl);
|
|
}
|
|
|
|
static size_t
|
|
gen_ivtbl_bytes(size_t n)
|
|
{
|
|
return offsetof(struct gen_ivtbl, ivptr) + n * sizeof(VALUE);
|
|
}
|
|
|
|
static struct gen_ivtbl *
|
|
gen_ivtbl_resize(struct gen_ivtbl *old, uint32_t n)
|
|
{
|
|
RUBY_ASSERT(n > 0);
|
|
|
|
uint32_t len = old ? old->numiv : 0;
|
|
struct gen_ivtbl *ivtbl = xrealloc(old, gen_ivtbl_bytes(n));
|
|
|
|
ivtbl->numiv = n;
|
|
for (; len < n; len++) {
|
|
ivtbl->ivptr[len] = Qundef;
|
|
}
|
|
|
|
return ivtbl;
|
|
}
|
|
|
|
#if 0
|
|
static struct gen_ivtbl *
|
|
gen_ivtbl_dup(const struct gen_ivtbl *orig)
|
|
{
|
|
size_t s = gen_ivtbl_bytes(orig->numiv);
|
|
struct gen_ivtbl *ivtbl = xmalloc(s);
|
|
|
|
memcpy(ivtbl, orig, s);
|
|
|
|
return ivtbl;
|
|
}
|
|
#endif
|
|
|
|
static int
|
|
generic_ivar_update(st_data_t *k, st_data_t *v, st_data_t u, int existing)
|
|
{
|
|
ASSERT_vm_locking();
|
|
|
|
struct ivar_update *ivup = (struct ivar_update *)u;
|
|
struct gen_ivtbl *ivtbl = 0;
|
|
|
|
if (existing) {
|
|
ivtbl = (struct gen_ivtbl *)*v;
|
|
if (ivup->iv_index < ivtbl->numiv) {
|
|
ivup->ivtbl = ivtbl;
|
|
return ST_STOP;
|
|
}
|
|
}
|
|
FL_SET((VALUE)*k, FL_EXIVAR);
|
|
ivtbl = gen_ivtbl_resize(ivtbl, ivup->shape->iv_count);
|
|
// Reinsert in to the hash table because ivtbl might be a newly resized chunk of memory
|
|
*v = (st_data_t)ivtbl;
|
|
ivup->ivtbl = ivtbl;
|
|
#if !SHAPE_IN_BASIC_FLAGS
|
|
ivtbl->shape_id = rb_shape_id(ivup->shape);
|
|
#endif
|
|
return ST_CONTINUE;
|
|
}
|
|
|
|
static void
|
|
gen_ivtbl_mark(const struct gen_ivtbl *ivtbl)
|
|
{
|
|
uint32_t i;
|
|
|
|
for (i = 0; i < ivtbl->numiv; i++) {
|
|
rb_gc_mark(ivtbl->ivptr[i]);
|
|
}
|
|
}
|
|
|
|
void
|
|
rb_mark_generic_ivar(VALUE obj)
|
|
{
|
|
struct gen_ivtbl *ivtbl;
|
|
|
|
if (rb_gen_ivtbl_get(obj, 0, &ivtbl)) {
|
|
gen_ivtbl_mark(ivtbl);
|
|
}
|
|
}
|
|
|
|
void
|
|
rb_mv_generic_ivar(VALUE rsrc, VALUE dst)
|
|
{
|
|
st_data_t key = (st_data_t)rsrc;
|
|
st_data_t ivtbl;
|
|
|
|
if (st_delete(generic_ivtbl_no_ractor_check(rsrc), &key, &ivtbl))
|
|
st_insert(generic_ivtbl_no_ractor_check(dst), (st_data_t)dst, ivtbl);
|
|
}
|
|
|
|
void
|
|
rb_free_generic_ivar(VALUE obj)
|
|
{
|
|
st_data_t key = (st_data_t)obj, ivtbl;
|
|
|
|
if (st_delete(generic_ivtbl_no_ractor_check(obj), &key, &ivtbl))
|
|
xfree((struct gen_ivtbl *)ivtbl);
|
|
}
|
|
|
|
RUBY_FUNC_EXPORTED size_t
|
|
rb_generic_ivar_memsize(VALUE obj)
|
|
{
|
|
struct gen_ivtbl *ivtbl;
|
|
|
|
if (rb_gen_ivtbl_get(obj, 0, &ivtbl))
|
|
return gen_ivtbl_bytes(ivtbl->numiv);
|
|
return 0;
|
|
}
|
|
|
|
#if !SHAPE_IN_BASIC_FLAGS
|
|
MJIT_FUNC_EXPORTED shape_id_t
|
|
rb_generic_shape_id(VALUE obj)
|
|
{
|
|
struct gen_ivtbl *ivtbl = 0;
|
|
shape_id_t shape_id = 0;
|
|
|
|
RB_VM_LOCK_ENTER();
|
|
{
|
|
st_table* global_iv_table = generic_ivtbl(obj, 0, false);
|
|
|
|
if (global_iv_table && st_lookup(global_iv_table, obj, (st_data_t *)&ivtbl)) {
|
|
shape_id = ivtbl->shape_id;
|
|
}
|
|
else if (OBJ_FROZEN(obj)) {
|
|
shape_id = FROZEN_ROOT_SHAPE_ID;
|
|
}
|
|
}
|
|
RB_VM_LOCK_LEAVE();
|
|
|
|
return shape_id;
|
|
}
|
|
#endif
|
|
|
|
static size_t
|
|
gen_ivtbl_count(const struct gen_ivtbl *ivtbl)
|
|
{
|
|
uint32_t i;
|
|
size_t n = 0;
|
|
|
|
for (i = 0; i < ivtbl->numiv; i++) {
|
|
if (ivtbl->ivptr[i] != Qundef) {
|
|
n++;
|
|
}
|
|
}
|
|
|
|
return n;
|
|
}
|
|
|
|
static int
|
|
lock_st_lookup(st_table *tab, st_data_t key, st_data_t *value)
|
|
{
|
|
int r;
|
|
RB_VM_LOCK_ENTER();
|
|
{
|
|
r = st_lookup(tab, key, value);
|
|
}
|
|
RB_VM_LOCK_LEAVE();
|
|
return r;
|
|
}
|
|
|
|
static int
|
|
lock_st_delete(st_table *tab, st_data_t *key, st_data_t *value)
|
|
{
|
|
int r;
|
|
RB_VM_LOCK_ENTER();
|
|
{
|
|
r = st_delete(tab, key, value);
|
|
}
|
|
RB_VM_LOCK_LEAVE();
|
|
return r;
|
|
}
|
|
|
|
static int
|
|
lock_st_is_member(st_table *tab, st_data_t key)
|
|
{
|
|
int r;
|
|
RB_VM_LOCK_ENTER();
|
|
{
|
|
r = st_is_member(tab, key);
|
|
}
|
|
RB_VM_LOCK_LEAVE();
|
|
return r;
|
|
}
|
|
|
|
static int
|
|
lock_st_insert(st_table *tab, st_data_t key, st_data_t value)
|
|
{
|
|
int r;
|
|
RB_VM_LOCK_ENTER();
|
|
{
|
|
r = st_insert(tab, key, value);
|
|
}
|
|
RB_VM_LOCK_LEAVE();
|
|
return r;
|
|
}
|
|
|
|
VALUE
|
|
rb_ivar_lookup(VALUE obj, ID id, VALUE undef)
|
|
{
|
|
if (SPECIAL_CONST_P(obj)) return undef;
|
|
|
|
shape_id_t shape_id;
|
|
VALUE * ivar_list;
|
|
rb_shape_t * shape;
|
|
|
|
#if SHAPE_IN_BASIC_FLAGS
|
|
shape_id = RBASIC_SHAPE_ID(obj);
|
|
#endif
|
|
|
|
switch (BUILTIN_TYPE(obj)) {
|
|
case T_CLASS:
|
|
case T_MODULE:
|
|
{
|
|
st_data_t val;
|
|
|
|
if (RCLASS_IV_TBL(obj) &&
|
|
lock_st_lookup(RCLASS_IV_TBL(obj), (st_data_t)id, &val)) {
|
|
if (rb_is_instance_id(id) &&
|
|
UNLIKELY(!rb_ractor_main_p()) &&
|
|
!rb_ractor_shareable_p(val)) {
|
|
rb_raise(rb_eRactorIsolationError,
|
|
"can not get unshareable values from instance variables of classes/modules from non-main Ractors");
|
|
}
|
|
return val;
|
|
}
|
|
else {
|
|
return undef;
|
|
}
|
|
}
|
|
case T_OBJECT:
|
|
{
|
|
#if !SHAPE_IN_BASIC_FLAGS
|
|
shape_id = ROBJECT_SHAPE_ID(obj);
|
|
#endif
|
|
ivar_list = ROBJECT_IVPTR(obj);
|
|
break;
|
|
}
|
|
default:
|
|
if (FL_TEST_RAW(obj, FL_EXIVAR)) {
|
|
struct gen_ivtbl *ivtbl;
|
|
rb_gen_ivtbl_get(obj, id, &ivtbl);
|
|
#if !SHAPE_IN_BASIC_FLAGS
|
|
shape_id = ivtbl->shape_id;
|
|
#endif
|
|
ivar_list = ivtbl->ivptr;
|
|
} else {
|
|
return undef;
|
|
}
|
|
break;
|
|
}
|
|
|
|
attr_index_t index = 0;
|
|
shape = rb_shape_get_shape_by_id(shape_id);
|
|
if (rb_shape_get_iv_index(shape, id, &index)) {
|
|
return ivar_list[index];
|
|
}
|
|
|
|
return undef;
|
|
}
|
|
|
|
VALUE
|
|
rb_ivar_get(VALUE obj, ID id)
|
|
{
|
|
VALUE iv = rb_ivar_lookup(obj, id, Qnil);
|
|
RB_DEBUG_COUNTER_INC(ivar_get_base);
|
|
return iv;
|
|
}
|
|
|
|
VALUE
|
|
rb_attr_get(VALUE obj, ID id)
|
|
{
|
|
return rb_ivar_lookup(obj, id, Qnil);
|
|
}
|
|
|
|
static VALUE
|
|
rb_ivar_delete(VALUE obj, ID id, VALUE undef)
|
|
{
|
|
rb_check_frozen(obj);
|
|
|
|
VALUE val = Qnil;
|
|
attr_index_t index;
|
|
|
|
switch (BUILTIN_TYPE(obj)) {
|
|
case T_CLASS:
|
|
case T_MODULE:
|
|
IVAR_ACCESSOR_SHOULD_BE_MAIN_RACTOR(id);
|
|
if (RCLASS_IV_TBL(obj)) {
|
|
st_data_t id_data = (st_data_t)id, val;
|
|
if (lock_st_delete(RCLASS_IV_TBL(obj), &id_data, &val)) {
|
|
return (VALUE)val;
|
|
}
|
|
}
|
|
break;
|
|
case T_OBJECT: {
|
|
rb_shape_t * shape = rb_shape_get_shape(obj);
|
|
if (rb_shape_get_iv_index(shape, id, &index)) {
|
|
rb_shape_transition_shape_remove_ivar(obj, id, shape);
|
|
val = ROBJECT_IVPTR(obj)[index];
|
|
ROBJECT_IVPTR(obj)[index] = Qundef;
|
|
return val;
|
|
}
|
|
|
|
break;
|
|
}
|
|
default: {
|
|
rb_shape_t * shape = rb_shape_get_shape(obj);
|
|
|
|
if (rb_shape_get_iv_index(shape, id, &index)) {
|
|
rb_shape_transition_shape_remove_ivar(obj, id, shape);
|
|
struct gen_ivtbl *ivtbl;
|
|
rb_gen_ivtbl_get(obj, id, &ivtbl);
|
|
val = ivtbl->ivptr[index];
|
|
ivtbl->ivptr[index] = Qundef;
|
|
return val;
|
|
}
|
|
|
|
break;
|
|
}
|
|
}
|
|
|
|
return undef;
|
|
}
|
|
|
|
VALUE
|
|
rb_attr_delete(VALUE obj, ID id)
|
|
{
|
|
return rb_ivar_delete(obj, id, Qnil);
|
|
}
|
|
|
|
static void
|
|
generic_ivar_set(VALUE obj, ID id, VALUE val)
|
|
{
|
|
struct ivar_update ivup;
|
|
// The returned shape will have `id` in its iv_table
|
|
rb_shape_t * shape = rb_shape_get_next(rb_shape_get_shape(obj), obj, id);
|
|
ivup.shape = shape;
|
|
|
|
RB_VM_LOCK_ENTER();
|
|
{
|
|
attr_index_t ent_data;
|
|
if (rb_shape_get_iv_index(shape, id, &ent_data)) {
|
|
ivup.iv_index = (uint32_t) ent_data;
|
|
}
|
|
else {
|
|
rb_bug("unreachable. Shape was not found for id: %s", rb_id2name(id));
|
|
}
|
|
|
|
st_update(generic_ivtbl(obj, id, false), (st_data_t)obj, generic_ivar_update, (st_data_t)&ivup);
|
|
}
|
|
RB_VM_LOCK_LEAVE();
|
|
|
|
ivup.ivtbl->ivptr[ivup.iv_index] = val;
|
|
|
|
rb_shape_set_shape(obj, shape);
|
|
RB_OBJ_WRITTEN(obj, Qundef, val);
|
|
}
|
|
|
|
static VALUE *
|
|
obj_ivar_heap_alloc(VALUE obj, size_t newsize)
|
|
{
|
|
VALUE *newptr = rb_transient_heap_alloc(obj, sizeof(VALUE) * newsize);
|
|
|
|
if (newptr != NULL) {
|
|
ROBJ_TRANSIENT_SET(obj);
|
|
}
|
|
else {
|
|
ROBJ_TRANSIENT_UNSET(obj);
|
|
newptr = ALLOC_N(VALUE, newsize);
|
|
}
|
|
return newptr;
|
|
}
|
|
|
|
static VALUE *
|
|
obj_ivar_heap_realloc(VALUE obj, int32_t len, size_t newsize)
|
|
{
|
|
VALUE *newptr;
|
|
int i;
|
|
|
|
if (ROBJ_TRANSIENT_P(obj)) {
|
|
const VALUE *orig_ptr = ROBJECT(obj)->as.heap.ivptr;
|
|
newptr = obj_ivar_heap_alloc(obj, newsize);
|
|
|
|
assert(newptr);
|
|
ROBJECT(obj)->as.heap.ivptr = newptr;
|
|
for (i=0; i<(int)len; i++) {
|
|
newptr[i] = orig_ptr[i];
|
|
}
|
|
}
|
|
else {
|
|
REALLOC_N(ROBJECT(obj)->as.heap.ivptr, VALUE, newsize);
|
|
newptr = ROBJECT(obj)->as.heap.ivptr;
|
|
}
|
|
|
|
return newptr;
|
|
}
|
|
|
|
#if USE_TRANSIENT_HEAP
|
|
void
|
|
rb_obj_transient_heap_evacuate(VALUE obj, int promote)
|
|
{
|
|
if (ROBJ_TRANSIENT_P(obj)) {
|
|
assert(!RB_FL_TEST_RAW(obj, ROBJECT_EMBED));
|
|
|
|
uint32_t len = ROBJECT_NUMIV(obj);
|
|
const VALUE *old_ptr = ROBJECT_IVPTR(obj);
|
|
VALUE *new_ptr;
|
|
|
|
if (promote) {
|
|
new_ptr = ALLOC_N(VALUE, len);
|
|
ROBJ_TRANSIENT_UNSET(obj);
|
|
}
|
|
else {
|
|
new_ptr = obj_ivar_heap_alloc(obj, len);
|
|
}
|
|
MEMCPY(new_ptr, old_ptr, VALUE, len);
|
|
ROBJECT(obj)->as.heap.ivptr = new_ptr;
|
|
}
|
|
}
|
|
#endif
|
|
|
|
void
|
|
rb_ensure_iv_list_size(VALUE obj, uint32_t len, uint32_t newsize)
|
|
{
|
|
VALUE *ptr = ROBJECT_IVPTR(obj);
|
|
VALUE *newptr;
|
|
|
|
if (RBASIC(obj)->flags & ROBJECT_EMBED) {
|
|
newptr = obj_ivar_heap_alloc(obj, newsize);
|
|
MEMCPY(newptr, ptr, VALUE, len);
|
|
RB_FL_UNSET_RAW(obj, ROBJECT_EMBED);
|
|
ROBJECT(obj)->as.heap.ivptr = newptr;
|
|
}
|
|
else {
|
|
newptr = obj_ivar_heap_realloc(obj, len, newsize);
|
|
}
|
|
|
|
for (; len < newsize; len++) {
|
|
newptr[len] = Qundef;
|
|
}
|
|
#if USE_RVARGC
|
|
ROBJECT(obj)->numiv = newsize;
|
|
#else
|
|
ROBJECT(obj)->as.heap.numiv = newsize;
|
|
#endif
|
|
}
|
|
|
|
struct gen_ivtbl *
|
|
rb_ensure_generic_iv_list_size(VALUE obj, uint32_t newsize)
|
|
{
|
|
struct gen_ivtbl * ivtbl = 0;
|
|
|
|
RB_VM_LOCK_ENTER();
|
|
{
|
|
if (UNLIKELY(!gen_ivtbl_get_unlocked(obj, 0, &ivtbl) || newsize > ivtbl->numiv)) {
|
|
ivtbl = gen_ivtbl_resize(ivtbl, newsize);
|
|
st_insert(generic_ivtbl_no_ractor_check(obj), (st_data_t)obj, (st_data_t)ivtbl);
|
|
FL_SET_RAW(obj, FL_EXIVAR);
|
|
}
|
|
}
|
|
RB_VM_LOCK_LEAVE();
|
|
|
|
RUBY_ASSERT(ivtbl);
|
|
|
|
return ivtbl;
|
|
}
|
|
|
|
void
|
|
rb_init_iv_list(VALUE obj)
|
|
{
|
|
uint32_t newsize = rb_shape_get_shape(obj)->iv_count * 2.0;
|
|
uint32_t len = ROBJECT_NUMIV(obj);
|
|
rb_ensure_iv_list_size(obj, len, newsize < len ? len : newsize);
|
|
}
|
|
|
|
// Return the instance variable index for a given name and T_OBJECT object. The
|
|
// mapping between name and index lives on `rb_obj_class(obj)` and is created
|
|
// if not already present.
|
|
//
|
|
// @note May raise when there are too many instance variables.
|
|
// @note YJIT uses this function at compile time to simplify the work needed to
|
|
// access the variable at runtime.
|
|
uint32_t
|
|
rb_obj_ensure_iv_index_mapping(VALUE obj, ID id)
|
|
{
|
|
RUBY_ASSERT(RB_TYPE_P(obj, T_OBJECT));
|
|
attr_index_t index;
|
|
|
|
// Ensure there is a transition for IVAR +id+
|
|
rb_shape_transition_shape(obj, id, rb_shape_get_shape_by_id(ROBJECT_SHAPE_ID(obj)));
|
|
|
|
// Get the current shape
|
|
rb_shape_t * shape = rb_shape_get_shape_by_id(ROBJECT_SHAPE_ID(obj));
|
|
|
|
if (!rb_shape_get_iv_index(shape, id, &index)) {
|
|
rb_bug("unreachable. Shape was not found for id: %s", rb_id2name(id));
|
|
}
|
|
|
|
uint32_t len = ROBJECT_NUMIV(obj);
|
|
if (len <= index) {
|
|
uint32_t newsize = (shape->iv_count + 1) * 1.25;
|
|
rb_ensure_iv_list_size(obj, len, newsize);
|
|
}
|
|
RUBY_ASSERT(index <= ROBJECT_NUMIV(obj));
|
|
return index;
|
|
}
|
|
|
|
static VALUE
|
|
obj_ivar_set(VALUE obj, ID id, VALUE val)
|
|
{
|
|
attr_index_t index = rb_obj_ensure_iv_index_mapping(obj, id);
|
|
RB_OBJ_WRITE(obj, &ROBJECT_IVPTR(obj)[index], val);
|
|
return val;
|
|
}
|
|
|
|
/* Set the instance variable +val+ on object +obj+ at ivar name +id+.
|
|
* This function only works with T_OBJECT objects, so make sure
|
|
* +obj+ is of type T_OBJECT before using this function.
|
|
*/
|
|
VALUE
|
|
rb_vm_set_ivar_id(VALUE obj, ID id, VALUE val)
|
|
{
|
|
rb_check_frozen_internal(obj);
|
|
obj_ivar_set(obj, id, val);
|
|
return val;
|
|
}
|
|
|
|
bool
|
|
rb_shape_set_shape_id(VALUE obj, shape_id_t shape_id)
|
|
{
|
|
if (rb_shape_get_shape_id(obj) == shape_id) {
|
|
return false;
|
|
}
|
|
|
|
#if SHAPE_IN_BASIC_FLAGS
|
|
RBASIC_SET_SHAPE_ID(obj, shape_id);
|
|
#else
|
|
switch (BUILTIN_TYPE(obj)) {
|
|
case T_OBJECT:
|
|
ROBJECT_SET_SHAPE_ID(obj, shape_id);
|
|
break;
|
|
case T_CLASS:
|
|
case T_MODULE:
|
|
{
|
|
RCLASS_EXT(obj)->shape_id = shape_id;
|
|
break;
|
|
}
|
|
default:
|
|
{
|
|
if (shape_id != FROZEN_ROOT_SHAPE_ID) {
|
|
struct gen_ivtbl *ivtbl = 0;
|
|
RB_VM_LOCK_ENTER();
|
|
{
|
|
st_table* global_iv_table = generic_ivtbl(obj, 0, false);
|
|
|
|
if (st_lookup(global_iv_table, obj, (st_data_t *)&ivtbl)) {
|
|
ivtbl->shape_id = shape_id;
|
|
}
|
|
else {
|
|
rb_bug("Expected shape_id entry in global iv table");
|
|
}
|
|
}
|
|
RB_VM_LOCK_LEAVE();
|
|
}
|
|
}
|
|
}
|
|
#endif
|
|
|
|
return true;
|
|
}
|
|
|
|
/**
|
|
* Prevents further modifications to the given object. ::rb_eFrozenError shall
|
|
* be raised if modification is attempted.
|
|
*
|
|
* @param[out] x Object in question.
|
|
*/
|
|
void rb_obj_freeze_inline(VALUE x)
|
|
{
|
|
if (RB_FL_ABLE(x)) {
|
|
RB_OBJ_FREEZE_RAW(x);
|
|
|
|
rb_shape_transition_shape_frozen(x);
|
|
|
|
if (RBASIC_CLASS(x) && !(RBASIC(x)->flags & RUBY_FL_SINGLETON)) {
|
|
rb_freeze_singleton_class(x);
|
|
}
|
|
}
|
|
}
|
|
|
|
static void
|
|
ivar_set(VALUE obj, ID id, VALUE val)
|
|
{
|
|
RB_DEBUG_COUNTER_INC(ivar_set_base);
|
|
|
|
switch (BUILTIN_TYPE(obj)) {
|
|
case T_OBJECT:
|
|
{
|
|
obj_ivar_set(obj, id, val);
|
|
break;
|
|
}
|
|
case T_CLASS:
|
|
case T_MODULE:
|
|
// TODO: Transition shapes on classes
|
|
//rb_shape_transition_shape(obj, id, rb_shape_get_shape_by_id(RCLASS_SHAPE_ID(obj)));
|
|
IVAR_ACCESSOR_SHOULD_BE_MAIN_RACTOR(id);
|
|
rb_class_ivar_set(obj, id, val);
|
|
break;
|
|
default:
|
|
generic_ivar_set(obj, id, val);
|
|
break;
|
|
}
|
|
}
|
|
|
|
VALUE
|
|
rb_ivar_set(VALUE obj, ID id, VALUE val)
|
|
{
|
|
rb_check_frozen(obj);
|
|
ivar_set(obj, id, val);
|
|
return val;
|
|
}
|
|
|
|
void
|
|
rb_ivar_set_internal(VALUE obj, ID id, VALUE val)
|
|
{
|
|
// should be internal instance variable name (no @ prefix)
|
|
VM_ASSERT(!rb_is_instance_id(id));
|
|
|
|
ivar_set(obj, id, val);
|
|
}
|
|
|
|
VALUE
|
|
rb_ivar_defined(VALUE obj, ID id)
|
|
{
|
|
attr_index_t index;
|
|
|
|
if (SPECIAL_CONST_P(obj)) return Qfalse;
|
|
switch (BUILTIN_TYPE(obj)) {
|
|
case T_CLASS:
|
|
case T_MODULE:
|
|
if (RCLASS_IV_TBL(obj) && lock_st_is_member(RCLASS_IV_TBL(obj), (st_data_t)id)) {
|
|
return Qtrue;
|
|
}
|
|
else {
|
|
return Qfalse;
|
|
}
|
|
default:
|
|
return RBOOL(rb_shape_get_iv_index(rb_shape_get_shape(obj), id, &index));
|
|
}
|
|
}
|
|
|
|
typedef int rb_ivar_foreach_callback_func(ID key, VALUE val, st_data_t arg);
|
|
st_data_t rb_st_nth_key(st_table *tab, st_index_t index);
|
|
|
|
static void
|
|
iterate_over_shapes_with_callback(rb_shape_t *shape, VALUE* iv_list, rb_ivar_foreach_callback_func *callback, st_data_t arg) {
|
|
switch ((enum shape_type)shape->type) {
|
|
case SHAPE_ROOT:
|
|
return;
|
|
case SHAPE_IVAR:
|
|
iterate_over_shapes_with_callback(rb_shape_get_shape_by_id(shape->parent_id), iv_list, callback, arg);
|
|
VALUE val = iv_list[shape->iv_count - 1];
|
|
if (val != Qundef) {
|
|
callback(shape->edge_name, val, arg);
|
|
}
|
|
return;
|
|
case SHAPE_IVAR_UNDEF:
|
|
case SHAPE_FROZEN:
|
|
iterate_over_shapes_with_callback(rb_shape_get_shape_by_id(shape->parent_id), iv_list, callback, arg);
|
|
return;
|
|
}
|
|
}
|
|
|
|
static void
|
|
obj_ivar_each(VALUE obj, rb_ivar_foreach_callback_func *func, st_data_t arg)
|
|
{
|
|
rb_shape_t* shape = rb_shape_get_shape(obj);
|
|
iterate_over_shapes_with_callback(shape, ROBJECT_IVPTR(obj), func, arg);
|
|
}
|
|
|
|
static void
|
|
gen_ivar_each(VALUE obj, rb_ivar_foreach_callback_func *func, st_data_t arg)
|
|
{
|
|
rb_shape_t *shape = rb_shape_get_shape(obj);
|
|
struct gen_ivtbl *ivtbl;
|
|
if (!rb_gen_ivtbl_get(obj, 0, &ivtbl)) return;
|
|
|
|
iterate_over_shapes_with_callback(shape, ivtbl->ivptr, func, arg);
|
|
}
|
|
|
|
void
|
|
rb_copy_generic_ivar(VALUE clone, VALUE obj)
|
|
{
|
|
struct gen_ivtbl *obj_ivtbl;
|
|
struct gen_ivtbl *new_ivtbl;
|
|
|
|
rb_check_frozen(clone);
|
|
|
|
if (!FL_TEST(obj, FL_EXIVAR)) {
|
|
goto clear;
|
|
}
|
|
|
|
if (rb_gen_ivtbl_get(obj, 0, &obj_ivtbl)) {
|
|
if (gen_ivtbl_count(obj_ivtbl) == 0)
|
|
goto clear;
|
|
|
|
new_ivtbl = gen_ivtbl_resize(0, obj_ivtbl->numiv);
|
|
FL_SET(clone, FL_EXIVAR);
|
|
|
|
for (uint32_t i=0; i<obj_ivtbl->numiv; i++) {
|
|
new_ivtbl->ivptr[i] = obj_ivtbl->ivptr[i];
|
|
RB_OBJ_WRITTEN(clone, Qundef, &new_ivtbl[i]);
|
|
}
|
|
|
|
/*
|
|
* c.ivtbl may change in gen_ivar_copy due to realloc,
|
|
* no need to free
|
|
*/
|
|
RB_VM_LOCK_ENTER();
|
|
{
|
|
generic_ivtbl_no_ractor_check(clone);
|
|
st_insert(generic_ivtbl_no_ractor_check(obj), (st_data_t)clone, (st_data_t)new_ivtbl);
|
|
}
|
|
RB_VM_LOCK_LEAVE();
|
|
|
|
rb_shape_t * obj_shape = rb_shape_get_shape(obj);
|
|
if (rb_shape_frozen_shape_p(obj_shape)) {
|
|
rb_shape_set_shape_id(clone, obj_shape->parent_id);
|
|
}
|
|
else {
|
|
rb_shape_set_shape(clone, obj_shape);
|
|
}
|
|
}
|
|
return;
|
|
|
|
clear:
|
|
if (FL_TEST(clone, FL_EXIVAR)) {
|
|
rb_free_generic_ivar(clone);
|
|
FL_UNSET(clone, FL_EXIVAR);
|
|
}
|
|
}
|
|
|
|
void
|
|
rb_replace_generic_ivar(VALUE clone, VALUE obj)
|
|
{
|
|
RUBY_ASSERT(FL_TEST(obj, FL_EXIVAR));
|
|
|
|
RB_VM_LOCK_ENTER();
|
|
{
|
|
st_data_t ivtbl, obj_data = (st_data_t)obj;
|
|
if (st_lookup(generic_iv_tbl_, (st_data_t)obj, &ivtbl)) {
|
|
st_insert(generic_iv_tbl_, (st_data_t)clone, ivtbl);
|
|
st_delete(generic_iv_tbl_, &obj_data, NULL);
|
|
}
|
|
else {
|
|
rb_bug("unreachable");
|
|
}
|
|
}
|
|
RB_VM_LOCK_LEAVE();
|
|
|
|
FL_SET(clone, FL_EXIVAR);
|
|
}
|
|
|
|
void
|
|
rb_ivar_foreach(VALUE obj, rb_ivar_foreach_callback_func *func, st_data_t arg)
|
|
{
|
|
if (SPECIAL_CONST_P(obj)) return;
|
|
switch (BUILTIN_TYPE(obj)) {
|
|
case T_OBJECT:
|
|
obj_ivar_each(obj, func, arg);
|
|
break;
|
|
case T_CLASS:
|
|
case T_MODULE:
|
|
IVAR_ACCESSOR_SHOULD_BE_MAIN_RACTOR(0);
|
|
if (RCLASS_IV_TBL(obj)) {
|
|
RB_VM_LOCK_ENTER();
|
|
{
|
|
st_foreach_safe(RCLASS_IV_TBL(obj), func, arg);
|
|
}
|
|
RB_VM_LOCK_LEAVE();
|
|
}
|
|
break;
|
|
default:
|
|
if (FL_TEST(obj, FL_EXIVAR)) {
|
|
gen_ivar_each(obj, func, arg);
|
|
}
|
|
break;
|
|
}
|
|
}
|
|
|
|
st_index_t
|
|
rb_ivar_count(VALUE obj)
|
|
{
|
|
st_table *tbl;
|
|
|
|
if (SPECIAL_CONST_P(obj)) return 0;
|
|
|
|
switch (BUILTIN_TYPE(obj)) {
|
|
case T_OBJECT:
|
|
if (rb_shape_get_shape(obj)->iv_count > 0) {
|
|
st_index_t i, count, num = ROBJECT_NUMIV(obj);
|
|
const VALUE *const ivptr = ROBJECT_IVPTR(obj);
|
|
for (i = count = 0; i < num; ++i) {
|
|
if (ivptr[i] != Qundef) {
|
|
count++;
|
|
}
|
|
}
|
|
return count;
|
|
}
|
|
break;
|
|
case T_CLASS:
|
|
case T_MODULE:
|
|
if ((tbl = RCLASS_IV_TBL(obj)) != 0) {
|
|
return tbl->num_entries;
|
|
}
|
|
break;
|
|
default:
|
|
if (FL_TEST(obj, FL_EXIVAR)) {
|
|
struct gen_ivtbl *ivtbl;
|
|
|
|
if (rb_gen_ivtbl_get(obj, 0, &ivtbl)) {
|
|
return gen_ivtbl_count(ivtbl);
|
|
}
|
|
}
|
|
break;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static int
|
|
ivar_i(st_data_t k, st_data_t v, st_data_t a)
|
|
{
|
|
ID key = (ID)k;
|
|
VALUE ary = (VALUE)a;
|
|
|
|
if (rb_is_instance_id(key)) {
|
|
rb_ary_push(ary, ID2SYM(key));
|
|
}
|
|
return ST_CONTINUE;
|
|
}
|
|
|
|
/*
|
|
* call-seq:
|
|
* obj.instance_variables -> array
|
|
*
|
|
* Returns an array of instance variable names for the receiver. Note
|
|
* that simply defining an accessor does not create the corresponding
|
|
* instance variable.
|
|
*
|
|
* class Fred
|
|
* attr_accessor :a1
|
|
* def initialize
|
|
* @iv = 3
|
|
* end
|
|
* end
|
|
* Fred.new.instance_variables #=> [:@iv]
|
|
*/
|
|
|
|
VALUE
|
|
rb_obj_instance_variables(VALUE obj)
|
|
{
|
|
VALUE ary;
|
|
|
|
ary = rb_ary_new();
|
|
rb_ivar_foreach(obj, ivar_i, ary);
|
|
return ary;
|
|
}
|
|
|
|
#define rb_is_constant_id rb_is_const_id
|
|
#define rb_is_constant_name rb_is_const_name
|
|
#define id_for_var(obj, name, part, type) \
|
|
id_for_var_message(obj, name, type, "`%1$s' is not allowed as "#part" "#type" variable name")
|
|
#define id_for_var_message(obj, name, type, message) \
|
|
check_id_type(obj, &(name), rb_is_##type##_id, rb_is_##type##_name, message, strlen(message))
|
|
static ID
|
|
check_id_type(VALUE obj, VALUE *pname,
|
|
int (*valid_id_p)(ID), int (*valid_name_p)(VALUE),
|
|
const char *message, size_t message_len)
|
|
{
|
|
ID id = rb_check_id(pname);
|
|
VALUE name = *pname;
|
|
|
|
if (id ? !valid_id_p(id) : !valid_name_p(name)) {
|
|
rb_name_err_raise_str(rb_fstring_new(message, message_len),
|
|
obj, name);
|
|
}
|
|
return id;
|
|
}
|
|
|
|
/*
|
|
* call-seq:
|
|
* obj.remove_instance_variable(symbol) -> obj
|
|
* obj.remove_instance_variable(string) -> obj
|
|
*
|
|
* Removes the named instance variable from <i>obj</i>, returning that
|
|
* variable's value.
|
|
* String arguments are converted to symbols.
|
|
*
|
|
* class Dummy
|
|
* attr_reader :var
|
|
* def initialize
|
|
* @var = 99
|
|
* end
|
|
* def remove
|
|
* remove_instance_variable(:@var)
|
|
* end
|
|
* end
|
|
* d = Dummy.new
|
|
* d.var #=> 99
|
|
* d.remove #=> 99
|
|
* d.var #=> nil
|
|
*/
|
|
|
|
VALUE
|
|
rb_obj_remove_instance_variable(VALUE obj, VALUE name)
|
|
{
|
|
VALUE val = Qnil;
|
|
const ID id = id_for_var(obj, name, an, instance);
|
|
|
|
// Frozen check comes here because it's expected that we raise a
|
|
// NameError (from the id_for_var check) before we raise a FrozenError
|
|
rb_check_frozen(obj);
|
|
|
|
attr_index_t index;
|
|
|
|
if (!id) {
|
|
goto not_defined;
|
|
}
|
|
|
|
switch (BUILTIN_TYPE(obj)) {
|
|
case T_CLASS:
|
|
case T_MODULE:
|
|
IVAR_ACCESSOR_SHOULD_BE_MAIN_RACTOR(id);
|
|
if (RCLASS_IV_TBL(obj)) {
|
|
st_data_t id_data = (st_data_t)id, val;
|
|
if (lock_st_delete(RCLASS_IV_TBL(obj), &id_data, &val)) {
|
|
return (VALUE)val;
|
|
}
|
|
}
|
|
break;
|
|
case T_OBJECT: {
|
|
rb_shape_t * shape = rb_shape_get_shape(obj);
|
|
if (rb_shape_get_iv_index(shape, id, &index)) {
|
|
rb_shape_transition_shape_remove_ivar(obj, id, shape);
|
|
val = ROBJECT_IVPTR(obj)[index];
|
|
ROBJECT_IVPTR(obj)[index] = Qundef;
|
|
return val;
|
|
}
|
|
|
|
break;
|
|
}
|
|
default: {
|
|
rb_shape_t * shape = rb_shape_get_shape(obj);
|
|
|
|
if (rb_shape_get_iv_index(shape, id, &index)) {
|
|
rb_shape_transition_shape_remove_ivar(obj, id, shape);
|
|
struct gen_ivtbl *ivtbl;
|
|
rb_gen_ivtbl_get(obj, id, &ivtbl);
|
|
val = ivtbl->ivptr[index];
|
|
ivtbl->ivptr[index] = Qundef;
|
|
return val;
|
|
}
|
|
|
|
break;
|
|
}
|
|
}
|
|
|
|
not_defined:
|
|
rb_name_err_raise("instance variable %1$s not defined",
|
|
obj, name);
|
|
UNREACHABLE_RETURN(Qnil);
|
|
}
|
|
|
|
NORETURN(static void uninitialized_constant(VALUE, VALUE));
|
|
static void
|
|
uninitialized_constant(VALUE klass, VALUE name)
|
|
{
|
|
if (klass && rb_class_real(klass) != rb_cObject)
|
|
rb_name_err_raise("uninitialized constant %2$s::%1$s",
|
|
klass, name);
|
|
else
|
|
rb_name_err_raise("uninitialized constant %1$s",
|
|
klass, name);
|
|
}
|
|
|
|
VALUE
|
|
rb_const_missing(VALUE klass, VALUE name)
|
|
{
|
|
VALUE value = rb_funcallv(klass, idConst_missing, 1, &name);
|
|
rb_vm_inc_const_missing_count();
|
|
return value;
|
|
}
|
|
|
|
|
|
/*
|
|
* call-seq:
|
|
* mod.const_missing(sym) -> obj
|
|
*
|
|
* Invoked when a reference is made to an undefined constant in
|
|
* <i>mod</i>. It is passed a symbol for the undefined constant, and
|
|
* returns a value to be used for that constant. The
|
|
* following code is an example of the same:
|
|
*
|
|
* def Foo.const_missing(name)
|
|
* name # return the constant name as Symbol
|
|
* end
|
|
*
|
|
* Foo::UNDEFINED_CONST #=> :UNDEFINED_CONST: symbol returned
|
|
*
|
|
* In the next example when a reference is made to an undefined constant,
|
|
* it attempts to load a file whose name is the lowercase version of the
|
|
* constant (thus class <code>Fred</code> is assumed to be in file
|
|
* <code>fred.rb</code>). If found, it returns the loaded class. It
|
|
* therefore implements an autoload feature similar to Kernel#autoload and
|
|
* Module#autoload.
|
|
*
|
|
* def Object.const_missing(name)
|
|
* @looked_for ||= {}
|
|
* str_name = name.to_s
|
|
* raise "Class not found: #{name}" if @looked_for[str_name]
|
|
* @looked_for[str_name] = 1
|
|
* file = str_name.downcase
|
|
* require file
|
|
* klass = const_get(name)
|
|
* return klass if klass
|
|
* raise "Class not found: #{name}"
|
|
* end
|
|
*
|
|
*/
|
|
|
|
VALUE
|
|
rb_mod_const_missing(VALUE klass, VALUE name)
|
|
{
|
|
VALUE ref = GET_EC()->private_const_reference;
|
|
rb_vm_pop_cfunc_frame();
|
|
if (ref) {
|
|
rb_name_err_raise("private constant %2$s::%1$s referenced",
|
|
ref, name);
|
|
}
|
|
uninitialized_constant(klass, name);
|
|
|
|
UNREACHABLE_RETURN(Qnil);
|
|
}
|
|
|
|
static void
|
|
autoload_table_mark(void *ptr)
|
|
{
|
|
rb_mark_tbl_no_pin((st_table *)ptr);
|
|
}
|
|
|
|
static void
|
|
autoload_table_free(void *ptr)
|
|
{
|
|
st_free_table((st_table *)ptr);
|
|
}
|
|
|
|
static size_t
|
|
autoload_table_memsize(const void *ptr)
|
|
{
|
|
const st_table *tbl = ptr;
|
|
return st_memsize(tbl);
|
|
}
|
|
|
|
static void
|
|
autoload_table_compact(void *ptr)
|
|
{
|
|
rb_gc_update_tbl_refs((st_table *)ptr);
|
|
}
|
|
|
|
static const rb_data_type_t autoload_table_type = {
|
|
"autoload_table",
|
|
{autoload_table_mark, autoload_table_free, autoload_table_memsize, autoload_table_compact,},
|
|
0, 0, RUBY_TYPED_FREE_IMMEDIATELY
|
|
};
|
|
|
|
#define check_autoload_table(av) \
|
|
(struct st_table *)rb_check_typeddata((av), &autoload_table_type)
|
|
|
|
static VALUE
|
|
autoload_data(VALUE mod, ID id)
|
|
{
|
|
struct st_table *tbl;
|
|
st_data_t val;
|
|
|
|
// Look up the instance variable table for `autoload`, then index into that table with the given constant name `id`.
|
|
if (!st_lookup(RCLASS_IV_TBL(mod), autoload, &val) || !(tbl = check_autoload_table((VALUE)val)) || !st_lookup(tbl, (st_data_t)id, &val)) {
|
|
return 0;
|
|
}
|
|
|
|
return (VALUE)val;
|
|
}
|
|
|
|
// Every autoload constant has exactly one instance of autoload_const, stored in `autoload_features`. Since multiple autoload constants can refer to the same file, every `autoload_const` refers to a de-duplicated `autoload_data`.
|
|
struct autoload_const {
|
|
// The linked list node of all constants which are loaded by the related autoload feature.
|
|
struct ccan_list_node cnode; /* <=> autoload_data.constants */
|
|
|
|
// The shared "autoload_data" if multiple constants are defined from the same feature.
|
|
VALUE autoload_data_value;
|
|
|
|
// The module we are loading a constant into.
|
|
VALUE module;
|
|
|
|
// The name of the constant we are loading.
|
|
ID name;
|
|
|
|
// The value of the constant (after it's loaded).
|
|
VALUE value;
|
|
|
|
// The constant entry flags which need to be re-applied after autoloading the feature.
|
|
rb_const_flag_t flag;
|
|
|
|
// The source file and line number that defined this constant (different from feature path).
|
|
VALUE file;
|
|
int line;
|
|
};
|
|
|
|
// Each `autoload_data` uniquely represents a specific feature which can be loaded, and a list of constants which it is able to define. We use a mutex to coordinate multiple threads trying to load the same feature.
|
|
struct autoload_data {
|
|
// The feature path to require to load this constant.
|
|
VALUE feature;
|
|
|
|
// The mutex which is protecting autoloading this feature.
|
|
VALUE mutex;
|
|
|
|
// The process fork serial number since the autoload mutex will become invalid on fork.
|
|
rb_serial_t fork_gen;
|
|
|
|
// The linked list of all constants that are going to be loaded by this autoload.
|
|
struct ccan_list_head constants; /* <=> autoload_const.cnode */
|
|
};
|
|
|
|
static void
|
|
autoload_data_compact(void *ptr)
|
|
{
|
|
struct autoload_data *p = ptr;
|
|
|
|
p->feature = rb_gc_location(p->feature);
|
|
p->mutex = rb_gc_location(p->mutex);
|
|
}
|
|
|
|
static void
|
|
autoload_data_mark(void *ptr)
|
|
{
|
|
struct autoload_data *p = ptr;
|
|
|
|
rb_gc_mark_movable(p->feature);
|
|
rb_gc_mark_movable(p->mutex);
|
|
}
|
|
|
|
static void
|
|
autoload_data_free(void *ptr)
|
|
{
|
|
struct autoload_data *p = ptr;
|
|
|
|
// We may leak some memory at VM shutdown time, no big deal...?
|
|
if (ccan_list_empty(&p->constants)) {
|
|
ruby_xfree(p);
|
|
}
|
|
}
|
|
|
|
static size_t
|
|
autoload_data_memsize(const void *ptr)
|
|
{
|
|
return sizeof(struct autoload_data);
|
|
}
|
|
|
|
static const rb_data_type_t autoload_data_type = {
|
|
"autoload_data",
|
|
{autoload_data_mark, autoload_data_free, autoload_data_memsize, autoload_data_compact},
|
|
0, 0, RUBY_TYPED_FREE_IMMEDIATELY
|
|
};
|
|
|
|
static void
|
|
autoload_const_compact(void *ptr)
|
|
{
|
|
struct autoload_const *ac = ptr;
|
|
|
|
ac->module = rb_gc_location(ac->module);
|
|
ac->autoload_data_value = rb_gc_location(ac->autoload_data_value);
|
|
ac->value = rb_gc_location(ac->value);
|
|
ac->file = rb_gc_location(ac->file);
|
|
}
|
|
|
|
static void
|
|
autoload_const_mark(void *ptr)
|
|
{
|
|
struct autoload_const *ac = ptr;
|
|
|
|
rb_gc_mark_movable(ac->module);
|
|
rb_gc_mark_movable(ac->autoload_data_value);
|
|
rb_gc_mark_movable(ac->value);
|
|
rb_gc_mark_movable(ac->file);
|
|
}
|
|
|
|
static size_t
|
|
autoload_const_memsize(const void *ptr)
|
|
{
|
|
return sizeof(struct autoload_const);
|
|
}
|
|
|
|
static void
|
|
autoload_const_free(void *ptr)
|
|
{
|
|
struct autoload_const *autoload_const = ptr;
|
|
|
|
ccan_list_del(&autoload_const->cnode);
|
|
ruby_xfree(ptr);
|
|
}
|
|
|
|
static const rb_data_type_t autoload_const_type = {
|
|
"autoload_const",
|
|
{autoload_const_mark, autoload_const_free, autoload_const_memsize, autoload_const_compact,},
|
|
0, 0, RUBY_TYPED_FREE_IMMEDIATELY
|
|
};
|
|
|
|
static struct autoload_data *
|
|
get_autoload_data(VALUE autoload_const_value, struct autoload_const **autoload_const_pointer)
|
|
{
|
|
struct autoload_const *autoload_const = rb_check_typeddata(autoload_const_value, &autoload_const_type);
|
|
|
|
struct autoload_data *autoload_data = rb_check_typeddata(autoload_const->autoload_data_value, &autoload_data_type);
|
|
|
|
/* do not reach across stack for ->state after forking: */
|
|
if (autoload_data && autoload_data->fork_gen != GET_VM()->fork_gen) {
|
|
autoload_data->mutex = Qnil;
|
|
autoload_data->fork_gen = 0;
|
|
}
|
|
|
|
if (autoload_const_pointer) *autoload_const_pointer = autoload_const;
|
|
|
|
return autoload_data;
|
|
}
|
|
|
|
RUBY_FUNC_EXPORTED void
|
|
rb_autoload(VALUE module, ID name, const char *feature)
|
|
{
|
|
if (!feature || !*feature) {
|
|
rb_raise(rb_eArgError, "empty feature name");
|
|
}
|
|
|
|
rb_autoload_str(module, name, rb_fstring_cstr(feature));
|
|
}
|
|
|
|
static void const_set(VALUE klass, ID id, VALUE val);
|
|
static void const_added(VALUE klass, ID const_name);
|
|
|
|
struct autoload_arguments {
|
|
VALUE module;
|
|
ID name;
|
|
VALUE feature;
|
|
};
|
|
|
|
static VALUE
|
|
autoload_feature_lookup_or_create(VALUE feature, struct autoload_data **autoload_data_pointer)
|
|
{
|
|
RUBY_ASSERT_MUTEX_OWNED(autoload_mutex);
|
|
RUBY_ASSERT_CRITICAL_SECTION_ENTER();
|
|
|
|
VALUE autoload_data_value = rb_hash_aref(autoload_features, feature);
|
|
struct autoload_data *autoload_data;
|
|
|
|
if (NIL_P(autoload_data_value)) {
|
|
autoload_data_value = TypedData_Make_Struct(0, struct autoload_data, &autoload_data_type, autoload_data);
|
|
autoload_data->feature = feature;
|
|
autoload_data->mutex = Qnil;
|
|
ccan_list_head_init(&autoload_data->constants);
|
|
|
|
if (autoload_data_pointer) *autoload_data_pointer = autoload_data;
|
|
|
|
rb_hash_aset(autoload_features, feature, autoload_data_value);
|
|
}
|
|
else if (autoload_data_pointer) {
|
|
*autoload_data_pointer = rb_check_typeddata(autoload_data_value, &autoload_data_type);
|
|
}
|
|
|
|
RUBY_ASSERT_CRITICAL_SECTION_LEAVE();
|
|
return autoload_data_value;
|
|
}
|
|
|
|
static struct st_table *
|
|
autoload_table_lookup_or_create(VALUE module)
|
|
{
|
|
// Get or create an autoload table in the class instance variables:
|
|
struct st_table *table = RCLASS_IV_TBL(module);
|
|
VALUE autoload_table_value;
|
|
|
|
if (table && st_lookup(table, (st_data_t)autoload, &autoload_table_value)) {
|
|
return check_autoload_table((VALUE)autoload_table_value);
|
|
}
|
|
|
|
if (!table) {
|
|
table = RCLASS_IV_TBL(module) = st_init_numtable();
|
|
}
|
|
|
|
autoload_table_value = TypedData_Wrap_Struct(0, &autoload_table_type, 0);
|
|
st_add_direct(table, (st_data_t)autoload, (st_data_t)autoload_table_value);
|
|
|
|
RB_OBJ_WRITTEN(module, Qnil, autoload_table_value);
|
|
return (DATA_PTR(autoload_table_value) = st_init_numtable());
|
|
}
|
|
|
|
static VALUE
|
|
autoload_synchronized(VALUE _arguments)
|
|
{
|
|
struct autoload_arguments *arguments = (struct autoload_arguments *)_arguments;
|
|
|
|
rb_const_entry_t *constant_entry = rb_const_lookup(arguments->module, arguments->name);
|
|
if (constant_entry && constant_entry->value != Qundef) {
|
|
return Qfalse;
|
|
}
|
|
|
|
// Reset any state associated with any previous constant:
|
|
const_set(arguments->module, arguments->name, Qundef);
|
|
|
|
struct st_table *autoload_table = autoload_table_lookup_or_create(arguments->module);
|
|
|
|
// Ensure the string is uniqued since we use an identity lookup:
|
|
VALUE feature = rb_fstring(arguments->feature);
|
|
|
|
struct autoload_data *autoload_data;
|
|
VALUE autoload_data_value = autoload_feature_lookup_or_create(feature, &autoload_data);
|
|
|
|
{
|
|
struct autoload_const *autoload_const;
|
|
VALUE autoload_const_value = TypedData_Make_Struct(0, struct autoload_const, &autoload_const_type, autoload_const);
|
|
autoload_const->module = arguments->module;
|
|
autoload_const->name = arguments->name;
|
|
autoload_const->value = Qundef;
|
|
autoload_const->flag = CONST_PUBLIC;
|
|
autoload_const->autoload_data_value = autoload_data_value;
|
|
ccan_list_add_tail(&autoload_data->constants, &autoload_const->cnode);
|
|
st_insert(autoload_table, (st_data_t)arguments->name, (st_data_t)autoload_const_value);
|
|
}
|
|
|
|
return Qtrue;
|
|
}
|
|
|
|
void
|
|
rb_autoload_str(VALUE module, ID name, VALUE feature)
|
|
{
|
|
if (!rb_is_const_id(name)) {
|
|
rb_raise(rb_eNameError, "autoload must be constant name: %"PRIsVALUE"", QUOTE_ID(name));
|
|
}
|
|
|
|
Check_Type(feature, T_STRING);
|
|
if (!RSTRING_LEN(feature)) {
|
|
rb_raise(rb_eArgError, "empty feature name");
|
|
}
|
|
|
|
struct autoload_arguments arguments = {
|
|
.module = module,
|
|
.name = name,
|
|
.feature = feature,
|
|
};
|
|
|
|
VALUE result = rb_mutex_synchronize(autoload_mutex, autoload_synchronized, (VALUE)&arguments);
|
|
|
|
if (result == Qtrue) {
|
|
const_added(module, name);
|
|
}
|
|
}
|
|
|
|
static void
|
|
autoload_delete(VALUE module, ID name)
|
|
{
|
|
RUBY_ASSERT_CRITICAL_SECTION_ENTER();
|
|
|
|
st_data_t value, load = 0, key = name;
|
|
|
|
if (st_lookup(RCLASS_IV_TBL(module), (st_data_t)autoload, &value)) {
|
|
struct st_table *table = check_autoload_table((VALUE)value);
|
|
|
|
st_delete(table, &key, &load);
|
|
|
|
/* Qfalse can indicate already deleted */
|
|
if (load != Qfalse) {
|
|
struct autoload_const *autoload_const;
|
|
struct autoload_data *autoload_data = get_autoload_data((VALUE)load, &autoload_const);
|
|
|
|
VM_ASSERT(autoload_data);
|
|
VM_ASSERT(!ccan_list_empty(&autoload_data->constants));
|
|
|
|
/*
|
|
* we must delete here to avoid "already initialized" warnings
|
|
* with parallel autoload. Using list_del_init here so list_del
|
|
* works in autoload_const_free
|
|
*/
|
|
ccan_list_del_init(&autoload_const->cnode);
|
|
|
|
if (ccan_list_empty(&autoload_data->constants)) {
|
|
rb_hash_delete(autoload_features, autoload_data->feature);
|
|
}
|
|
|
|
// If the autoload table is empty, we can delete it.
|
|
if (table->num_entries == 0) {
|
|
name = autoload;
|
|
st_delete(RCLASS_IV_TBL(module), &name, &value);
|
|
}
|
|
}
|
|
}
|
|
|
|
RUBY_ASSERT_CRITICAL_SECTION_LEAVE();
|
|
}
|
|
|
|
static int
|
|
autoload_by_someone_else(struct autoload_data *ele)
|
|
{
|
|
return ele->mutex != Qnil && !rb_mutex_owned_p(ele->mutex);
|
|
}
|
|
|
|
static VALUE
|
|
check_autoload_required(VALUE mod, ID id, const char **loadingpath)
|
|
{
|
|
VALUE autoload_const_value = autoload_data(mod, id);
|
|
struct autoload_data *autoload_data;
|
|
const char *loading;
|
|
|
|
if (!autoload_const_value || !(autoload_data = get_autoload_data(autoload_const_value, 0))) {
|
|
return 0;
|
|
}
|
|
|
|
VALUE feature = autoload_data->feature;
|
|
|
|
/*
|
|
* if somebody else is autoloading, we MUST wait for them, since
|
|
* rb_provide_feature can provide a feature before autoload_const_set
|
|
* completes. We must wait until autoload_const_set finishes in
|
|
* the other thread.
|
|
*/
|
|
if (autoload_by_someone_else(autoload_data)) {
|
|
return autoload_const_value;
|
|
}
|
|
|
|
loading = RSTRING_PTR(feature);
|
|
|
|
if (!rb_feature_provided(loading, &loading)) {
|
|
return autoload_const_value;
|
|
}
|
|
|
|
if (loadingpath && loading) {
|
|
*loadingpath = loading;
|
|
return autoload_const_value;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static struct autoload_const *autoloading_const_entry(VALUE mod, ID id);
|
|
|
|
MJIT_FUNC_EXPORTED int
|
|
rb_autoloading_value(VALUE mod, ID id, VALUE* value, rb_const_flag_t *flag)
|
|
{
|
|
struct autoload_const *ac = autoloading_const_entry(mod, id);
|
|
if (!ac) return FALSE;
|
|
|
|
if (value) {
|
|
*value = ac->value;
|
|
}
|
|
|
|
if (flag) {
|
|
*flag = ac->flag;
|
|
}
|
|
|
|
return TRUE;
|
|
}
|
|
|
|
static int
|
|
autoload_by_current(struct autoload_data *ele)
|
|
{
|
|
return ele->mutex != Qnil && rb_mutex_owned_p(ele->mutex);
|
|
}
|
|
|
|
// If there is an autoloading constant and it has been set by the current
|
|
// execution context, return it. This allows threads which are loading code to
|
|
// refer to their own autoloaded constants.
|
|
struct autoload_const *
|
|
autoloading_const_entry(VALUE mod, ID id)
|
|
{
|
|
VALUE load = autoload_data(mod, id);
|
|
struct autoload_data *ele;
|
|
struct autoload_const *ac;
|
|
|
|
// Find the autoloading state:
|
|
if (!load || !(ele = get_autoload_data(load, &ac))) {
|
|
// Couldn't be found:
|
|
return 0;
|
|
}
|
|
|
|
// Check if it's being loaded by the current thread/fiber:
|
|
if (autoload_by_current(ele)) {
|
|
if (ac->value != Qundef) {
|
|
return ac;
|
|
}
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int
|
|
autoload_defined_p(VALUE mod, ID id)
|
|
{
|
|
rb_const_entry_t *ce = rb_const_lookup(mod, id);
|
|
|
|
// If there is no constant or the constant is not undefined (special marker for autoloading):
|
|
if (!ce || ce->value != Qundef) {
|
|
// We are not autoloading:
|
|
return 0;
|
|
}
|
|
|
|
// Otherwise check if there is an autoload in flight right now:
|
|
return !rb_autoloading_value(mod, id, NULL, NULL);
|
|
}
|
|
|
|
static void const_tbl_update(struct autoload_const *, int);
|
|
|
|
struct autoload_load_arguments {
|
|
VALUE module;
|
|
ID name;
|
|
int flag;
|
|
|
|
VALUE mutex;
|
|
|
|
// The specific constant which triggered the autoload code to fire:
|
|
struct autoload_const *autoload_const;
|
|
|
|
// The parent autoload data which is shared between multiple constants:
|
|
struct autoload_data *autoload_data;
|
|
};
|
|
|
|
static VALUE
|
|
autoload_const_set(struct autoload_const *ac)
|
|
{
|
|
check_before_mod_set(ac->module, ac->name, ac->value, "constant");
|
|
|
|
RB_VM_LOCK_ENTER();
|
|
{
|
|
const_tbl_update(ac, true);
|
|
}
|
|
RB_VM_LOCK_LEAVE();
|
|
|
|
return 0; /* ignored */
|
|
}
|
|
|
|
static VALUE
|
|
autoload_load_needed(VALUE _arguments)
|
|
{
|
|
struct autoload_load_arguments *arguments = (struct autoload_load_arguments*)_arguments;
|
|
|
|
const char *loading = 0, *src;
|
|
|
|
if (!autoload_defined_p(arguments->module, arguments->name)) {
|
|
return Qfalse;
|
|
}
|
|
|
|
VALUE autoload_const_value = check_autoload_required(arguments->module, arguments->name, &loading);
|
|
if (!autoload_const_value) {
|
|
return Qfalse;
|
|
}
|
|
|
|
src = rb_sourcefile();
|
|
if (src && loading && strcmp(src, loading) == 0) {
|
|
return Qfalse;
|
|
}
|
|
|
|
struct autoload_const *autoload_const;
|
|
struct autoload_data *autoload_data;
|
|
if (!(autoload_data = get_autoload_data(autoload_const_value, &autoload_const))) {
|
|
return Qfalse;
|
|
}
|
|
|
|
if (NIL_P(autoload_data->mutex)) {
|
|
autoload_data->mutex = rb_mutex_new();
|
|
autoload_data->fork_gen = GET_VM()->fork_gen;
|
|
}
|
|
else if (rb_mutex_owned_p(autoload_data->mutex)) {
|
|
return Qfalse;
|
|
}
|
|
|
|
arguments->mutex = autoload_data->mutex;
|
|
arguments->autoload_const = autoload_const;
|
|
|
|
return autoload_const_value;
|
|
}
|
|
|
|
static VALUE
|
|
autoload_apply_constants(VALUE _arguments)
|
|
{
|
|
RUBY_ASSERT_CRITICAL_SECTION_ENTER();
|
|
|
|
struct autoload_load_arguments *arguments = (struct autoload_load_arguments*)_arguments;
|
|
|
|
struct autoload_const *autoload_const = 0; // for ccan_container_off_var()
|
|
struct autoload_const *next;
|
|
|
|
// We use safe iteration here because `autoload_const_set` will eventually invoke
|
|
// `autoload_delete` which will remove the constant from the linked list. In theory, once
|
|
// the `autoload_data->constants` linked list is empty, we can remove it.
|
|
|
|
// Iterate over all constants and assign them:
|
|
ccan_list_for_each_safe(&arguments->autoload_data->constants, autoload_const, next, cnode) {
|
|
if (autoload_const->value != Qundef) {
|
|
autoload_const_set(autoload_const);
|
|
}
|
|
}
|
|
|
|
RUBY_ASSERT_CRITICAL_SECTION_LEAVE();
|
|
|
|
return Qtrue;
|
|
}
|
|
|
|
static VALUE
|
|
autoload_feature_require(VALUE _arguments)
|
|
{
|
|
struct autoload_load_arguments *arguments = (struct autoload_load_arguments*)_arguments;
|
|
|
|
struct autoload_const *autoload_const = arguments->autoload_const;
|
|
|
|
// We save this for later use in autoload_apply_constants:
|
|
arguments->autoload_data = rb_check_typeddata(autoload_const->autoload_data_value, &autoload_data_type);
|
|
|
|
VALUE result = rb_funcall(rb_vm_top_self(), rb_intern("require"), 1, arguments->autoload_data->feature);
|
|
|
|
if (RTEST(result)) {
|
|
return rb_mutex_synchronize(autoload_mutex, autoload_apply_constants, _arguments);
|
|
}
|
|
|
|
return result;
|
|
}
|
|
|
|
static VALUE
|
|
autoload_try_load(VALUE _arguments)
|
|
{
|
|
struct autoload_load_arguments *arguments = (struct autoload_load_arguments*)_arguments;
|
|
|
|
VALUE result = autoload_feature_require(_arguments);
|
|
|
|
// After we loaded the feature, if the constant is not defined, we remove it completely:
|
|
rb_const_entry_t *ce = rb_const_lookup(arguments->module, arguments->name);
|
|
|
|
if (!ce || ce->value == Qundef) {
|
|
result = Qfalse;
|
|
|
|
rb_const_remove(arguments->module, arguments->name);
|
|
|
|
if (arguments->module == rb_cObject) {
|
|
rb_warning(
|
|
"Expected %"PRIsVALUE" to define %"PRIsVALUE" but it didn't",
|
|
arguments->autoload_data->feature,
|
|
ID2SYM(arguments->name)
|
|
);
|
|
}
|
|
else {
|
|
rb_warning(
|
|
"Expected %"PRIsVALUE" to define %"PRIsVALUE"::%"PRIsVALUE" but it didn't",
|
|
arguments->autoload_data->feature,
|
|
arguments->module,
|
|
ID2SYM(arguments->name)
|
|
);
|
|
}
|
|
}
|
|
else {
|
|
// Otherwise, it was loaded, copy the flags from the autoload constant:
|
|
ce->flag |= arguments->flag;
|
|
}
|
|
|
|
return result;
|
|
}
|
|
|
|
VALUE
|
|
rb_autoload_load(VALUE module, ID name)
|
|
{
|
|
rb_const_entry_t *ce = rb_const_lookup(module, name);
|
|
|
|
// We bail out as early as possible without any synchronisation:
|
|
if (!ce || ce->value != Qundef) {
|
|
return Qfalse;
|
|
}
|
|
|
|
// At this point, we assume there might be autoloading, so fail if it's ractor:
|
|
if (UNLIKELY(!rb_ractor_main_p())) {
|
|
rb_raise(rb_eRactorUnsafeError, "require by autoload on non-main Ractor is not supported (%s)", rb_id2name(name));
|
|
}
|
|
|
|
// This state is stored on thes stack and is used during the autoload process.
|
|
struct autoload_load_arguments arguments = {.module = module, .name = name, .mutex = Qnil};
|
|
|
|
// Figure out whether we can autoload the named constant:
|
|
VALUE autoload_const_value = rb_mutex_synchronize(autoload_mutex, autoload_load_needed, (VALUE)&arguments);
|
|
|
|
// This confirms whether autoloading is required or not:
|
|
if (autoload_const_value == Qfalse) return autoload_const_value;
|
|
|
|
arguments.flag = ce->flag & (CONST_DEPRECATED | CONST_VISIBILITY_MASK);
|
|
|
|
// Only one thread will enter here at a time:
|
|
VALUE result = rb_mutex_synchronize(arguments.mutex, autoload_try_load, (VALUE)&arguments);
|
|
|
|
// If you don't guard this value, it's possible for the autoload constant to
|
|
// be freed by another thread which loads multiple constants, one of which
|
|
// resolves to the constant this thread is trying to load, so proteect this
|
|
// so that it is not freed until we are done with it in `autoload_try_load`:
|
|
RB_GC_GUARD(autoload_const_value);
|
|
|
|
return result;
|
|
}
|
|
|
|
VALUE
|
|
rb_autoload_p(VALUE mod, ID id)
|
|
{
|
|
return rb_autoload_at_p(mod, id, TRUE);
|
|
}
|
|
|
|
VALUE
|
|
rb_autoload_at_p(VALUE mod, ID id, int recur)
|
|
{
|
|
VALUE load;
|
|
struct autoload_data *ele;
|
|
|
|
while (!autoload_defined_p(mod, id)) {
|
|
if (!recur) return Qnil;
|
|
mod = RCLASS_SUPER(mod);
|
|
if (!mod) return Qnil;
|
|
}
|
|
load = check_autoload_required(mod, id, 0);
|
|
if (!load) return Qnil;
|
|
return (ele = get_autoload_data(load, 0)) ? ele->feature : Qnil;
|
|
}
|
|
|
|
MJIT_FUNC_EXPORTED void
|
|
rb_const_warn_if_deprecated(const rb_const_entry_t *ce, VALUE klass, ID id)
|
|
{
|
|
if (RB_CONST_DEPRECATED_P(ce) &&
|
|
rb_warning_category_enabled_p(RB_WARN_CATEGORY_DEPRECATED)) {
|
|
if (klass == rb_cObject) {
|
|
rb_category_warn(RB_WARN_CATEGORY_DEPRECATED, "constant ::%"PRIsVALUE" is deprecated", QUOTE_ID(id));
|
|
}
|
|
else {
|
|
rb_category_warn(RB_WARN_CATEGORY_DEPRECATED, "constant %"PRIsVALUE"::%"PRIsVALUE" is deprecated",
|
|
rb_class_name(klass), QUOTE_ID(id));
|
|
}
|
|
}
|
|
}
|
|
|
|
static VALUE
|
|
rb_const_get_0(VALUE klass, ID id, int exclude, int recurse, int visibility)
|
|
{
|
|
VALUE c = rb_const_search(klass, id, exclude, recurse, visibility);
|
|
if (c != Qundef) {
|
|
if (UNLIKELY(!rb_ractor_main_p())) {
|
|
if (!rb_ractor_shareable_p(c)) {
|
|
rb_raise(rb_eRactorIsolationError, "can not access non-shareable objects in constant %"PRIsVALUE"::%s by non-main Ractor.", rb_class_path(klass), rb_id2name(id));
|
|
}
|
|
}
|
|
return c;
|
|
}
|
|
return rb_const_missing(klass, ID2SYM(id));
|
|
}
|
|
|
|
static VALUE
|
|
rb_const_search_from(VALUE klass, ID id, int exclude, int recurse, int visibility)
|
|
{
|
|
VALUE value, current;
|
|
bool first_iteration = true;
|
|
|
|
for (current = klass;
|
|
RTEST(current);
|
|
current = RCLASS_SUPER(current), first_iteration = false) {
|
|
VALUE tmp;
|
|
VALUE am = 0;
|
|
rb_const_entry_t *ce;
|
|
|
|
if (!first_iteration && RCLASS_ORIGIN(current) != current) {
|
|
// This item in the super chain has an origin iclass
|
|
// that comes later in the chain. Skip this item so
|
|
// prepended modules take precedence.
|
|
continue;
|
|
}
|
|
|
|
// Do lookup in original class or module in case we are at an origin
|
|
// iclass in the chain.
|
|
tmp = current;
|
|
if (BUILTIN_TYPE(tmp) == T_ICLASS) tmp = RBASIC(tmp)->klass;
|
|
|
|
// Do the lookup. Loop in case of autoload.
|
|
while ((ce = rb_const_lookup(tmp, id))) {
|
|
if (visibility && RB_CONST_PRIVATE_P(ce)) {
|
|
GET_EC()->private_const_reference = tmp;
|
|
return Qundef;
|
|
}
|
|
rb_const_warn_if_deprecated(ce, tmp, id);
|
|
value = ce->value;
|
|
if (value == Qundef) {
|
|
struct autoload_const *ac;
|
|
if (am == tmp) break;
|
|
am = tmp;
|
|
ac = autoloading_const_entry(tmp, id);
|
|
if (ac) return ac->value;
|
|
rb_autoload_load(tmp, id);
|
|
continue;
|
|
}
|
|
if (exclude && tmp == rb_cObject) {
|
|
goto not_found;
|
|
}
|
|
return value;
|
|
}
|
|
if (!recurse) break;
|
|
}
|
|
|
|
not_found:
|
|
GET_EC()->private_const_reference = 0;
|
|
return Qundef;
|
|
}
|
|
|
|
static VALUE
|
|
rb_const_search(VALUE klass, ID id, int exclude, int recurse, int visibility)
|
|
{
|
|
VALUE value;
|
|
|
|
if (klass == rb_cObject) exclude = FALSE;
|
|
value = rb_const_search_from(klass, id, exclude, recurse, visibility);
|
|
if (value != Qundef) return value;
|
|
if (exclude) return value;
|
|
if (BUILTIN_TYPE(klass) != T_MODULE) return value;
|
|
/* search global const too, if klass is a module */
|
|
return rb_const_search_from(rb_cObject, id, FALSE, recurse, visibility);
|
|
}
|
|
|
|
VALUE
|
|
rb_const_get_from(VALUE klass, ID id)
|
|
{
|
|
return rb_const_get_0(klass, id, TRUE, TRUE, FALSE);
|
|
}
|
|
|
|
VALUE
|
|
rb_const_get(VALUE klass, ID id)
|
|
{
|
|
return rb_const_get_0(klass, id, FALSE, TRUE, FALSE);
|
|
}
|
|
|
|
VALUE
|
|
rb_const_get_at(VALUE klass, ID id)
|
|
{
|
|
return rb_const_get_0(klass, id, TRUE, FALSE, FALSE);
|
|
}
|
|
|
|
MJIT_FUNC_EXPORTED VALUE
|
|
rb_public_const_get_from(VALUE klass, ID id)
|
|
{
|
|
return rb_const_get_0(klass, id, TRUE, TRUE, TRUE);
|
|
}
|
|
|
|
MJIT_FUNC_EXPORTED VALUE
|
|
rb_public_const_get_at(VALUE klass, ID id)
|
|
{
|
|
return rb_const_get_0(klass, id, TRUE, FALSE, TRUE);
|
|
}
|
|
|
|
NORETURN(static void undefined_constant(VALUE mod, VALUE name));
|
|
static void
|
|
undefined_constant(VALUE mod, VALUE name)
|
|
{
|
|
rb_name_err_raise("constant %2$s::%1$s not defined",
|
|
mod, name);
|
|
}
|
|
|
|
static VALUE
|
|
rb_const_location_from(VALUE klass, ID id, int exclude, int recurse, int visibility)
|
|
{
|
|
while (RTEST(klass)) {
|
|
rb_const_entry_t *ce;
|
|
|
|
while ((ce = rb_const_lookup(klass, id))) {
|
|
if (visibility && RB_CONST_PRIVATE_P(ce)) {
|
|
return Qnil;
|
|
}
|
|
if (exclude && klass == rb_cObject) {
|
|
goto not_found;
|
|
}
|
|
if (NIL_P(ce->file)) return rb_ary_new();
|
|
return rb_assoc_new(ce->file, INT2NUM(ce->line));
|
|
}
|
|
if (!recurse) break;
|
|
klass = RCLASS_SUPER(klass);
|
|
}
|
|
|
|
not_found:
|
|
return Qnil;
|
|
}
|
|
|
|
static VALUE
|
|
rb_const_location(VALUE klass, ID id, int exclude, int recurse, int visibility)
|
|
{
|
|
VALUE loc;
|
|
|
|
if (klass == rb_cObject) exclude = FALSE;
|
|
loc = rb_const_location_from(klass, id, exclude, recurse, visibility);
|
|
if (!NIL_P(loc)) return loc;
|
|
if (exclude) return loc;
|
|
if (BUILTIN_TYPE(klass) != T_MODULE) return loc;
|
|
/* search global const too, if klass is a module */
|
|
return rb_const_location_from(rb_cObject, id, FALSE, recurse, visibility);
|
|
}
|
|
|
|
VALUE
|
|
rb_const_source_location(VALUE klass, ID id)
|
|
{
|
|
return rb_const_location(klass, id, FALSE, TRUE, FALSE);
|
|
}
|
|
|
|
MJIT_FUNC_EXPORTED VALUE
|
|
rb_const_source_location_at(VALUE klass, ID id)
|
|
{
|
|
return rb_const_location(klass, id, TRUE, FALSE, FALSE);
|
|
}
|
|
|
|
/*
|
|
* call-seq:
|
|
* remove_const(sym) -> obj
|
|
*
|
|
* Removes the definition of the given constant, returning that
|
|
* constant's previous value. If that constant referred to
|
|
* a module, this will not change that module's name and can lead
|
|
* to confusion.
|
|
*/
|
|
|
|
VALUE
|
|
rb_mod_remove_const(VALUE mod, VALUE name)
|
|
{
|
|
const ID id = id_for_var(mod, name, a, constant);
|
|
|
|
if (!id) {
|
|
undefined_constant(mod, name);
|
|
}
|
|
return rb_const_remove(mod, id);
|
|
}
|
|
|
|
VALUE
|
|
rb_const_remove(VALUE mod, ID id)
|
|
{
|
|
VALUE val;
|
|
rb_const_entry_t *ce;
|
|
|
|
rb_check_frozen(mod);
|
|
|
|
ce = rb_const_lookup(mod, id);
|
|
if (!ce || !rb_id_table_delete(RCLASS_CONST_TBL(mod), id)) {
|
|
if (rb_const_defined_at(mod, id)) {
|
|
rb_name_err_raise("cannot remove %2$s::%1$s", mod, ID2SYM(id));
|
|
}
|
|
|
|
undefined_constant(mod, ID2SYM(id));
|
|
}
|
|
|
|
rb_clear_constant_cache_for_id(id);
|
|
|
|
val = ce->value;
|
|
|
|
if (val == Qundef) {
|
|
autoload_delete(mod, id);
|
|
val = Qnil;
|
|
}
|
|
|
|
ruby_xfree(ce);
|
|
|
|
return val;
|
|
}
|
|
|
|
static int
|
|
cv_i_update(st_data_t *k, st_data_t *v, st_data_t a, int existing)
|
|
{
|
|
if (existing) return ST_STOP;
|
|
*v = a;
|
|
return ST_CONTINUE;
|
|
}
|
|
|
|
static enum rb_id_table_iterator_result
|
|
sv_i(ID key, VALUE v, void *a)
|
|
{
|
|
rb_const_entry_t *ce = (rb_const_entry_t *)v;
|
|
st_table *tbl = a;
|
|
|
|
if (rb_is_const_id(key)) {
|
|
st_update(tbl, (st_data_t)key, cv_i_update, (st_data_t)ce);
|
|
}
|
|
return ID_TABLE_CONTINUE;
|
|
}
|
|
|
|
static enum rb_id_table_iterator_result
|
|
rb_local_constants_i(ID const_name, VALUE const_value, void *ary)
|
|
{
|
|
if (rb_is_const_id(const_name) && !RB_CONST_PRIVATE_P((rb_const_entry_t *)const_value)) {
|
|
rb_ary_push((VALUE)ary, ID2SYM(const_name));
|
|
}
|
|
return ID_TABLE_CONTINUE;
|
|
}
|
|
|
|
static VALUE
|
|
rb_local_constants(VALUE mod)
|
|
{
|
|
struct rb_id_table *tbl = RCLASS_CONST_TBL(mod);
|
|
VALUE ary;
|
|
|
|
if (!tbl) return rb_ary_new2(0);
|
|
|
|
RB_VM_LOCK_ENTER();
|
|
{
|
|
ary = rb_ary_new2(rb_id_table_size(tbl));
|
|
rb_id_table_foreach(tbl, rb_local_constants_i, (void *)ary);
|
|
}
|
|
RB_VM_LOCK_LEAVE();
|
|
|
|
return ary;
|
|
}
|
|
|
|
void*
|
|
rb_mod_const_at(VALUE mod, void *data)
|
|
{
|
|
st_table *tbl = data;
|
|
if (!tbl) {
|
|
tbl = st_init_numtable();
|
|
}
|
|
if (RCLASS_CONST_TBL(mod)) {
|
|
RB_VM_LOCK_ENTER();
|
|
{
|
|
rb_id_table_foreach(RCLASS_CONST_TBL(mod), sv_i, tbl);
|
|
}
|
|
RB_VM_LOCK_LEAVE();
|
|
}
|
|
return tbl;
|
|
}
|
|
|
|
void*
|
|
rb_mod_const_of(VALUE mod, void *data)
|
|
{
|
|
VALUE tmp = mod;
|
|
for (;;) {
|
|
data = rb_mod_const_at(tmp, data);
|
|
tmp = RCLASS_SUPER(tmp);
|
|
if (!tmp) break;
|
|
if (tmp == rb_cObject && mod != rb_cObject) break;
|
|
}
|
|
return data;
|
|
}
|
|
|
|
static int
|
|
list_i(st_data_t key, st_data_t value, VALUE ary)
|
|
{
|
|
ID sym = (ID)key;
|
|
rb_const_entry_t *ce = (rb_const_entry_t *)value;
|
|
if (RB_CONST_PUBLIC_P(ce)) rb_ary_push(ary, ID2SYM(sym));
|
|
return ST_CONTINUE;
|
|
}
|
|
|
|
VALUE
|
|
rb_const_list(void *data)
|
|
{
|
|
st_table *tbl = data;
|
|
VALUE ary;
|
|
|
|
if (!tbl) return rb_ary_new2(0);
|
|
ary = rb_ary_new2(tbl->num_entries);
|
|
st_foreach_safe(tbl, list_i, ary);
|
|
st_free_table(tbl);
|
|
|
|
return ary;
|
|
}
|
|
|
|
/*
|
|
* call-seq:
|
|
* mod.constants(inherit=true) -> array
|
|
*
|
|
* Returns an array of the names of the constants accessible in
|
|
* <i>mod</i>. This includes the names of constants in any included
|
|
* modules (example at start of section), unless the <i>inherit</i>
|
|
* parameter is set to <code>false</code>.
|
|
*
|
|
* The implementation makes no guarantees about the order in which the
|
|
* constants are yielded.
|
|
*
|
|
* IO.constants.include?(:SYNC) #=> true
|
|
* IO.constants(false).include?(:SYNC) #=> false
|
|
*
|
|
* Also see Module#const_defined?.
|
|
*/
|
|
|
|
VALUE
|
|
rb_mod_constants(int argc, const VALUE *argv, VALUE mod)
|
|
{
|
|
bool inherit = true;
|
|
|
|
if (rb_check_arity(argc, 0, 1)) inherit = RTEST(argv[0]);
|
|
|
|
if (inherit) {
|
|
return rb_const_list(rb_mod_const_of(mod, 0));
|
|
}
|
|
else {
|
|
return rb_local_constants(mod);
|
|
}
|
|
}
|
|
|
|
static int
|
|
rb_const_defined_0(VALUE klass, ID id, int exclude, int recurse, int visibility)
|
|
{
|
|
VALUE tmp;
|
|
int mod_retry = 0;
|
|
rb_const_entry_t *ce;
|
|
|
|
tmp = klass;
|
|
retry:
|
|
while (tmp) {
|
|
if ((ce = rb_const_lookup(tmp, id))) {
|
|
if (visibility && RB_CONST_PRIVATE_P(ce)) {
|
|
return (int)Qfalse;
|
|
}
|
|
if (ce->value == Qundef && !check_autoload_required(tmp, id, 0) &&
|
|
!rb_autoloading_value(tmp, id, NULL, NULL))
|
|
return (int)Qfalse;
|
|
|
|
if (exclude && tmp == rb_cObject && klass != rb_cObject) {
|
|
return (int)Qfalse;
|
|
}
|
|
|
|
return (int)Qtrue;
|
|
}
|
|
if (!recurse) break;
|
|
tmp = RCLASS_SUPER(tmp);
|
|
}
|
|
if (!exclude && !mod_retry && BUILTIN_TYPE(klass) == T_MODULE) {
|
|
mod_retry = 1;
|
|
tmp = rb_cObject;
|
|
goto retry;
|
|
}
|
|
return (int)Qfalse;
|
|
}
|
|
|
|
int
|
|
rb_const_defined_from(VALUE klass, ID id)
|
|
{
|
|
return rb_const_defined_0(klass, id, TRUE, TRUE, FALSE);
|
|
}
|
|
|
|
int
|
|
rb_const_defined(VALUE klass, ID id)
|
|
{
|
|
return rb_const_defined_0(klass, id, FALSE, TRUE, FALSE);
|
|
}
|
|
|
|
int
|
|
rb_const_defined_at(VALUE klass, ID id)
|
|
{
|
|
return rb_const_defined_0(klass, id, TRUE, FALSE, FALSE);
|
|
}
|
|
|
|
MJIT_FUNC_EXPORTED int
|
|
rb_public_const_defined_from(VALUE klass, ID id)
|
|
{
|
|
return rb_const_defined_0(klass, id, TRUE, TRUE, TRUE);
|
|
}
|
|
|
|
static void
|
|
check_before_mod_set(VALUE klass, ID id, VALUE val, const char *dest)
|
|
{
|
|
rb_check_frozen(klass);
|
|
}
|
|
|
|
static void set_namespace_path(VALUE named_namespace, VALUE name);
|
|
|
|
static enum rb_id_table_iterator_result
|
|
set_namespace_path_i(ID id, VALUE v, void *payload)
|
|
{
|
|
rb_const_entry_t *ce = (rb_const_entry_t *)v;
|
|
VALUE value = ce->value;
|
|
int has_permanent_classpath;
|
|
VALUE parental_path = *((VALUE *) payload);
|
|
if (!rb_is_const_id(id) || !rb_namespace_p(value)) {
|
|
return ID_TABLE_CONTINUE;
|
|
}
|
|
classname(value, &has_permanent_classpath);
|
|
if (has_permanent_classpath) {
|
|
return ID_TABLE_CONTINUE;
|
|
}
|
|
set_namespace_path(value, build_const_path(parental_path, id));
|
|
if (RCLASS_IV_TBL(value)) {
|
|
st_data_t tmp = tmp_classpath;
|
|
st_delete(RCLASS_IV_TBL(value), &tmp, 0);
|
|
}
|
|
|
|
return ID_TABLE_CONTINUE;
|
|
}
|
|
|
|
/*
|
|
* Assign permanent classpaths to all namespaces that are directly or indirectly
|
|
* nested under +named_namespace+. +named_namespace+ must have a permanent
|
|
* classpath.
|
|
*/
|
|
static void
|
|
set_namespace_path(VALUE named_namespace, VALUE namespace_path)
|
|
{
|
|
struct rb_id_table *const_table = RCLASS_CONST_TBL(named_namespace);
|
|
|
|
RB_VM_LOCK_ENTER();
|
|
{
|
|
rb_class_ivar_set(named_namespace, classpath, namespace_path);
|
|
if (const_table) {
|
|
rb_id_table_foreach(const_table, set_namespace_path_i, &namespace_path);
|
|
}
|
|
}
|
|
RB_VM_LOCK_LEAVE();
|
|
}
|
|
|
|
static void
|
|
const_added(VALUE klass, ID const_name)
|
|
{
|
|
if (GET_VM()->running) {
|
|
VALUE name = ID2SYM(const_name);
|
|
rb_funcallv(klass, idConst_added, 1, &name);
|
|
}
|
|
}
|
|
|
|
static void
|
|
const_set(VALUE klass, ID id, VALUE val)
|
|
{
|
|
rb_const_entry_t *ce;
|
|
|
|
if (NIL_P(klass)) {
|
|
rb_raise(rb_eTypeError, "no class/module to define constant %"PRIsVALUE"",
|
|
QUOTE_ID(id));
|
|
}
|
|
|
|
if (!rb_ractor_main_p() && !rb_ractor_shareable_p(val)) {
|
|
rb_raise(rb_eRactorIsolationError, "can not set constants with non-shareable objects by non-main Ractors");
|
|
}
|
|
|
|
check_before_mod_set(klass, id, val, "constant");
|
|
|
|
RB_VM_LOCK_ENTER();
|
|
{
|
|
struct rb_id_table *tbl = RCLASS_CONST_TBL(klass);
|
|
if (!tbl) {
|
|
RCLASS_CONST_TBL(klass) = tbl = rb_id_table_create(0);
|
|
rb_clear_constant_cache_for_id(id);
|
|
ce = ZALLOC(rb_const_entry_t);
|
|
rb_id_table_insert(tbl, id, (VALUE)ce);
|
|
setup_const_entry(ce, klass, val, CONST_PUBLIC);
|
|
}
|
|
else {
|
|
struct autoload_const ac = {
|
|
.module = klass, .name = id,
|
|
.value = val, .flag = CONST_PUBLIC,
|
|
/* fill the rest with 0 */
|
|
};
|
|
ac.file = rb_source_location(&ac.line);
|
|
const_tbl_update(&ac, false);
|
|
}
|
|
}
|
|
RB_VM_LOCK_LEAVE();
|
|
|
|
/*
|
|
* Resolve and cache class name immediately to resolve ambiguity
|
|
* and avoid order-dependency on const_tbl
|
|
*/
|
|
if (rb_cObject && rb_namespace_p(val)) {
|
|
int val_path_permanent;
|
|
VALUE val_path = classname(val, &val_path_permanent);
|
|
if (NIL_P(val_path) || !val_path_permanent) {
|
|
if (klass == rb_cObject) {
|
|
set_namespace_path(val, rb_id2str(id));
|
|
}
|
|
else {
|
|
int parental_path_permanent;
|
|
VALUE parental_path = classname(klass, &parental_path_permanent);
|
|
if (NIL_P(parental_path)) {
|
|
int throwaway;
|
|
parental_path = rb_tmp_class_path(klass, &throwaway, make_temporary_path);
|
|
}
|
|
if (parental_path_permanent && !val_path_permanent) {
|
|
set_namespace_path(val, build_const_path(parental_path, id));
|
|
}
|
|
else if (!parental_path_permanent && NIL_P(val_path)) {
|
|
ivar_set(val, tmp_classpath, build_const_path(parental_path, id));
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
void
|
|
rb_const_set(VALUE klass, ID id, VALUE val)
|
|
{
|
|
const_set(klass, id, val);
|
|
const_added(klass, id);
|
|
}
|
|
|
|
static struct autoload_data *
|
|
autoload_data_for_named_constant(VALUE module, ID name, struct autoload_const **autoload_const_pointer)
|
|
{
|
|
VALUE autoload_data_value = autoload_data(module, name);
|
|
if (!autoload_data_value) return 0;
|
|
|
|
struct autoload_data *autoload_data = get_autoload_data(autoload_data_value, autoload_const_pointer);
|
|
if (!autoload_data) return 0;
|
|
|
|
/* for autoloading thread, keep the defined value to autoloading storage */
|
|
if (autoload_by_current(autoload_data)) {
|
|
return autoload_data;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void
|
|
const_tbl_update(struct autoload_const *ac, int autoload_force)
|
|
{
|
|
VALUE value;
|
|
VALUE klass = ac->module;
|
|
VALUE val = ac->value;
|
|
ID id = ac->name;
|
|
struct rb_id_table *tbl = RCLASS_CONST_TBL(klass);
|
|
rb_const_flag_t visibility = ac->flag;
|
|
rb_const_entry_t *ce;
|
|
|
|
if (rb_id_table_lookup(tbl, id, &value)) {
|
|
ce = (rb_const_entry_t *)value;
|
|
if (ce->value == Qundef) {
|
|
RUBY_ASSERT_CRITICAL_SECTION_ENTER();
|
|
VALUE file = ac->file;
|
|
int line = ac->line;
|
|
struct autoload_data *ele = autoload_data_for_named_constant(klass, id, &ac);
|
|
|
|
if (!autoload_force && ele) {
|
|
rb_clear_constant_cache_for_id(id);
|
|
|
|
ac->value = val; /* autoload_data is non-WB-protected */
|
|
ac->file = rb_source_location(&ac->line);
|
|
}
|
|
else {
|
|
/* otherwise autoloaded constant, allow to override */
|
|
autoload_delete(klass, id);
|
|
ce->flag = visibility;
|
|
RB_OBJ_WRITE(klass, &ce->value, val);
|
|
RB_OBJ_WRITE(klass, &ce->file, file);
|
|
ce->line = line;
|
|
}
|
|
RUBY_ASSERT_CRITICAL_SECTION_LEAVE();
|
|
return;
|
|
}
|
|
else {
|
|
VALUE name = QUOTE_ID(id);
|
|
visibility = ce->flag;
|
|
if (klass == rb_cObject)
|
|
rb_warn("already initialized constant %"PRIsVALUE"", name);
|
|
else
|
|
rb_warn("already initialized constant %"PRIsVALUE"::%"PRIsVALUE"",
|
|
rb_class_name(klass), name);
|
|
if (!NIL_P(ce->file) && ce->line) {
|
|
rb_compile_warn(RSTRING_PTR(ce->file), ce->line,
|
|
"previous definition of %"PRIsVALUE" was here", name);
|
|
}
|
|
}
|
|
rb_clear_constant_cache_for_id(id);
|
|
setup_const_entry(ce, klass, val, visibility);
|
|
}
|
|
else {
|
|
rb_clear_constant_cache_for_id(id);
|
|
|
|
ce = ZALLOC(rb_const_entry_t);
|
|
rb_id_table_insert(tbl, id, (VALUE)ce);
|
|
setup_const_entry(ce, klass, val, visibility);
|
|
}
|
|
}
|
|
|
|
static void
|
|
setup_const_entry(rb_const_entry_t *ce, VALUE klass, VALUE val,
|
|
rb_const_flag_t visibility)
|
|
{
|
|
ce->flag = visibility;
|
|
RB_OBJ_WRITE(klass, &ce->value, val);
|
|
RB_OBJ_WRITE(klass, &ce->file, rb_source_location(&ce->line));
|
|
}
|
|
|
|
void
|
|
rb_define_const(VALUE klass, const char *name, VALUE val)
|
|
{
|
|
ID id = rb_intern(name);
|
|
|
|
if (!rb_is_const_id(id)) {
|
|
rb_warn("rb_define_const: invalid name `%s' for constant", name);
|
|
}
|
|
rb_gc_register_mark_object(val);
|
|
rb_const_set(klass, id, val);
|
|
}
|
|
|
|
void
|
|
rb_define_global_const(const char *name, VALUE val)
|
|
{
|
|
rb_define_const(rb_cObject, name, val);
|
|
}
|
|
|
|
static void
|
|
set_const_visibility(VALUE mod, int argc, const VALUE *argv,
|
|
rb_const_flag_t flag, rb_const_flag_t mask)
|
|
{
|
|
int i;
|
|
rb_const_entry_t *ce;
|
|
ID id;
|
|
|
|
rb_class_modify_check(mod);
|
|
if (argc == 0) {
|
|
rb_warning("%"PRIsVALUE" with no argument is just ignored",
|
|
QUOTE_ID(rb_frame_callee()));
|
|
return;
|
|
}
|
|
|
|
for (i = 0; i < argc; i++) {
|
|
struct autoload_const *ac;
|
|
VALUE val = argv[i];
|
|
id = rb_check_id(&val);
|
|
if (!id) {
|
|
undefined_constant(mod, val);
|
|
}
|
|
if ((ce = rb_const_lookup(mod, id))) {
|
|
ce->flag &= ~mask;
|
|
ce->flag |= flag;
|
|
if (ce->value == Qundef) {
|
|
struct autoload_data *ele;
|
|
|
|
ele = autoload_data_for_named_constant(mod, id, &ac);
|
|
if (ele) {
|
|
ac->flag &= ~mask;
|
|
ac->flag |= flag;
|
|
}
|
|
}
|
|
rb_clear_constant_cache_for_id(id);
|
|
}
|
|
else {
|
|
undefined_constant(mod, ID2SYM(id));
|
|
}
|
|
}
|
|
}
|
|
|
|
void
|
|
rb_deprecate_constant(VALUE mod, const char *name)
|
|
{
|
|
rb_const_entry_t *ce;
|
|
ID id;
|
|
long len = strlen(name);
|
|
|
|
rb_class_modify_check(mod);
|
|
if (!(id = rb_check_id_cstr(name, len, NULL))) {
|
|
undefined_constant(mod, rb_fstring_new(name, len));
|
|
}
|
|
if (!(ce = rb_const_lookup(mod, id))) {
|
|
undefined_constant(mod, ID2SYM(id));
|
|
}
|
|
ce->flag |= CONST_DEPRECATED;
|
|
}
|
|
|
|
/*
|
|
* call-seq:
|
|
* mod.private_constant(symbol, ...) => mod
|
|
*
|
|
* Makes a list of existing constants private.
|
|
*/
|
|
|
|
VALUE
|
|
rb_mod_private_constant(int argc, const VALUE *argv, VALUE obj)
|
|
{
|
|
set_const_visibility(obj, argc, argv, CONST_PRIVATE, CONST_VISIBILITY_MASK);
|
|
return obj;
|
|
}
|
|
|
|
/*
|
|
* call-seq:
|
|
* mod.public_constant(symbol, ...) => mod
|
|
*
|
|
* Makes a list of existing constants public.
|
|
*/
|
|
|
|
VALUE
|
|
rb_mod_public_constant(int argc, const VALUE *argv, VALUE obj)
|
|
{
|
|
set_const_visibility(obj, argc, argv, CONST_PUBLIC, CONST_VISIBILITY_MASK);
|
|
return obj;
|
|
}
|
|
|
|
/*
|
|
* call-seq:
|
|
* mod.deprecate_constant(symbol, ...) => mod
|
|
*
|
|
* Makes a list of existing constants deprecated. Attempt
|
|
* to refer to them will produce a warning.
|
|
*
|
|
* module HTTP
|
|
* NotFound = Exception.new
|
|
* NOT_FOUND = NotFound # previous version of the library used this name
|
|
*
|
|
* deprecate_constant :NOT_FOUND
|
|
* end
|
|
*
|
|
* HTTP::NOT_FOUND
|
|
* # warning: constant HTTP::NOT_FOUND is deprecated
|
|
*
|
|
*/
|
|
|
|
VALUE
|
|
rb_mod_deprecate_constant(int argc, const VALUE *argv, VALUE obj)
|
|
{
|
|
set_const_visibility(obj, argc, argv, CONST_DEPRECATED, CONST_DEPRECATED);
|
|
return obj;
|
|
}
|
|
|
|
static VALUE
|
|
original_module(VALUE c)
|
|
{
|
|
if (RB_TYPE_P(c, T_ICLASS))
|
|
return RBASIC(c)->klass;
|
|
return c;
|
|
}
|
|
|
|
static int
|
|
cvar_lookup_at(VALUE klass, ID id, st_data_t *v)
|
|
{
|
|
if (!RCLASS_IV_TBL(klass)) return 0;
|
|
return st_lookup(RCLASS_IV_TBL(klass), (st_data_t)id, v);
|
|
}
|
|
|
|
static VALUE
|
|
cvar_front_klass(VALUE klass)
|
|
{
|
|
if (FL_TEST(klass, FL_SINGLETON)) {
|
|
VALUE obj = rb_ivar_get(klass, id__attached__);
|
|
if (rb_namespace_p(obj)) {
|
|
return obj;
|
|
}
|
|
}
|
|
return RCLASS_SUPER(klass);
|
|
}
|
|
|
|
static void
|
|
cvar_overtaken(VALUE front, VALUE target, ID id)
|
|
{
|
|
if (front && target != front) {
|
|
st_data_t did = (st_data_t)id;
|
|
|
|
if (original_module(front) != original_module(target)) {
|
|
rb_raise(rb_eRuntimeError,
|
|
"class variable % "PRIsVALUE" of %"PRIsVALUE" is overtaken by %"PRIsVALUE"",
|
|
ID2SYM(id), rb_class_name(original_module(front)),
|
|
rb_class_name(original_module(target)));
|
|
}
|
|
if (BUILTIN_TYPE(front) == T_CLASS) {
|
|
st_delete(RCLASS_IV_TBL(front), &did, 0);
|
|
}
|
|
}
|
|
}
|
|
|
|
static VALUE
|
|
find_cvar(VALUE klass, VALUE * front, VALUE * target, ID id)
|
|
{
|
|
VALUE v = Qundef;
|
|
CVAR_ACCESSOR_SHOULD_BE_MAIN_RACTOR();
|
|
if (cvar_lookup_at(klass, id, (&v))) {
|
|
if (!*front) {
|
|
*front = klass;
|
|
}
|
|
*target = klass;
|
|
}
|
|
|
|
for (klass = cvar_front_klass(klass); klass; klass = RCLASS_SUPER(klass)) {
|
|
if (cvar_lookup_at(klass, id, (&v))) {
|
|
if (!*front) {
|
|
*front = klass;
|
|
}
|
|
*target = klass;
|
|
}
|
|
}
|
|
|
|
return v;
|
|
}
|
|
|
|
#define CVAR_FOREACH_ANCESTORS(klass, v, r) \
|
|
for (klass = cvar_front_klass(klass); klass; klass = RCLASS_SUPER(klass)) { \
|
|
if (cvar_lookup_at(klass, id, (v))) { \
|
|
r; \
|
|
} \
|
|
}
|
|
|
|
#define CVAR_LOOKUP(v,r) do {\
|
|
CVAR_ACCESSOR_SHOULD_BE_MAIN_RACTOR(); \
|
|
if (cvar_lookup_at(klass, id, (v))) {r;}\
|
|
CVAR_FOREACH_ANCESTORS(klass, v, r);\
|
|
} while(0)
|
|
|
|
static void
|
|
check_for_cvar_table(VALUE subclass, VALUE key)
|
|
{
|
|
st_table *tbl = RCLASS_IV_TBL(subclass);
|
|
|
|
if (tbl && st_lookup(tbl, key, NULL)) {
|
|
RB_DEBUG_COUNTER_INC(cvar_class_invalidate);
|
|
ruby_vm_global_cvar_state++;
|
|
return;
|
|
}
|
|
|
|
rb_class_foreach_subclass(subclass, check_for_cvar_table, key);
|
|
}
|
|
|
|
void
|
|
rb_cvar_set(VALUE klass, ID id, VALUE val)
|
|
{
|
|
VALUE tmp, front = 0, target = 0;
|
|
|
|
tmp = klass;
|
|
CVAR_LOOKUP(0, {if (!front) front = klass; target = klass;});
|
|
if (target) {
|
|
cvar_overtaken(front, target, id);
|
|
}
|
|
else {
|
|
target = tmp;
|
|
}
|
|
|
|
if (RB_TYPE_P(target, T_ICLASS)) {
|
|
target = RBASIC(target)->klass;
|
|
}
|
|
check_before_mod_set(target, id, val, "class variable");
|
|
|
|
int result = rb_class_ivar_set(target, id, val);
|
|
|
|
struct rb_id_table *rb_cvc_tbl = RCLASS_CVC_TBL(target);
|
|
|
|
if (!rb_cvc_tbl) {
|
|
rb_cvc_tbl = RCLASS_CVC_TBL(target) = rb_id_table_create(2);
|
|
}
|
|
|
|
struct rb_cvar_class_tbl_entry *ent;
|
|
VALUE ent_data;
|
|
|
|
if (!rb_id_table_lookup(rb_cvc_tbl, id, &ent_data)) {
|
|
ent = ALLOC(struct rb_cvar_class_tbl_entry);
|
|
ent->class_value = target;
|
|
ent->global_cvar_state = GET_GLOBAL_CVAR_STATE();
|
|
rb_id_table_insert(rb_cvc_tbl, id, (VALUE)ent);
|
|
RB_DEBUG_COUNTER_INC(cvar_inline_miss);
|
|
}
|
|
else {
|
|
ent = (void *)ent_data;
|
|
ent->global_cvar_state = GET_GLOBAL_CVAR_STATE();
|
|
}
|
|
|
|
// Break the cvar cache if this is a new class variable
|
|
// and target is a module or a subclass with the same
|
|
// cvar in this lookup.
|
|
if (result == 0) {
|
|
if (RB_TYPE_P(target, T_CLASS)) {
|
|
if (RCLASS_SUBCLASSES(target)) {
|
|
rb_class_foreach_subclass(target, check_for_cvar_table, id);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
VALUE
|
|
rb_cvar_find(VALUE klass, ID id, VALUE *front)
|
|
{
|
|
VALUE target = 0;
|
|
VALUE value;
|
|
|
|
value = find_cvar(klass, front, &target, id);
|
|
if (!target) {
|
|
rb_name_err_raise("uninitialized class variable %1$s in %2$s",
|
|
klass, ID2SYM(id));
|
|
}
|
|
cvar_overtaken(*front, target, id);
|
|
return (VALUE)value;
|
|
}
|
|
|
|
VALUE
|
|
rb_cvar_get(VALUE klass, ID id)
|
|
{
|
|
VALUE front = 0;
|
|
return rb_cvar_find(klass, id, &front);
|
|
}
|
|
|
|
VALUE
|
|
rb_cvar_defined(VALUE klass, ID id)
|
|
{
|
|
if (!klass) return Qfalse;
|
|
CVAR_LOOKUP(0,return Qtrue);
|
|
return Qfalse;
|
|
}
|
|
|
|
static ID
|
|
cv_intern(VALUE klass, const char *name)
|
|
{
|
|
ID id = rb_intern(name);
|
|
if (!rb_is_class_id(id)) {
|
|
rb_name_err_raise("wrong class variable name %1$s",
|
|
klass, rb_str_new_cstr(name));
|
|
}
|
|
return id;
|
|
}
|
|
|
|
void
|
|
rb_cv_set(VALUE klass, const char *name, VALUE val)
|
|
{
|
|
ID id = cv_intern(klass, name);
|
|
rb_cvar_set(klass, id, val);
|
|
}
|
|
|
|
VALUE
|
|
rb_cv_get(VALUE klass, const char *name)
|
|
{
|
|
ID id = cv_intern(klass, name);
|
|
return rb_cvar_get(klass, id);
|
|
}
|
|
|
|
void
|
|
rb_define_class_variable(VALUE klass, const char *name, VALUE val)
|
|
{
|
|
rb_cv_set(klass, name, val);
|
|
}
|
|
|
|
static int
|
|
cv_i(st_data_t k, st_data_t v, st_data_t a)
|
|
{
|
|
ID key = (ID)k;
|
|
st_table *tbl = (st_table *)a;
|
|
|
|
if (rb_is_class_id(key)) {
|
|
st_update(tbl, (st_data_t)key, cv_i_update, 0);
|
|
}
|
|
return ST_CONTINUE;
|
|
}
|
|
|
|
static void*
|
|
mod_cvar_at(VALUE mod, void *data)
|
|
{
|
|
st_table *tbl = data;
|
|
if (!tbl) {
|
|
tbl = st_init_numtable();
|
|
}
|
|
if (RCLASS_IV_TBL(mod)) {
|
|
st_foreach_safe(RCLASS_IV_TBL(mod), cv_i, (st_data_t)tbl);
|
|
}
|
|
return tbl;
|
|
}
|
|
|
|
static void*
|
|
mod_cvar_of(VALUE mod, void *data)
|
|
{
|
|
VALUE tmp = mod;
|
|
if (FL_TEST(mod, FL_SINGLETON)) {
|
|
if (rb_namespace_p(rb_ivar_get(mod, id__attached__))) {
|
|
data = mod_cvar_at(tmp, data);
|
|
tmp = cvar_front_klass(tmp);
|
|
}
|
|
}
|
|
for (;;) {
|
|
data = mod_cvar_at(tmp, data);
|
|
tmp = RCLASS_SUPER(tmp);
|
|
if (!tmp) break;
|
|
}
|
|
return data;
|
|
}
|
|
|
|
static int
|
|
cv_list_i(st_data_t key, st_data_t value, VALUE ary)
|
|
{
|
|
ID sym = (ID)key;
|
|
rb_ary_push(ary, ID2SYM(sym));
|
|
return ST_CONTINUE;
|
|
}
|
|
|
|
static VALUE
|
|
cvar_list(void *data)
|
|
{
|
|
st_table *tbl = data;
|
|
VALUE ary;
|
|
|
|
if (!tbl) return rb_ary_new2(0);
|
|
ary = rb_ary_new2(tbl->num_entries);
|
|
st_foreach_safe(tbl, cv_list_i, ary);
|
|
st_free_table(tbl);
|
|
|
|
return ary;
|
|
}
|
|
|
|
/*
|
|
* call-seq:
|
|
* mod.class_variables(inherit=true) -> array
|
|
*
|
|
* Returns an array of the names of class variables in <i>mod</i>.
|
|
* This includes the names of class variables in any included
|
|
* modules, unless the <i>inherit</i> parameter is set to
|
|
* <code>false</code>.
|
|
*
|
|
* class One
|
|
* @@var1 = 1
|
|
* end
|
|
* class Two < One
|
|
* @@var2 = 2
|
|
* end
|
|
* One.class_variables #=> [:@@var1]
|
|
* Two.class_variables #=> [:@@var2, :@@var1]
|
|
* Two.class_variables(false) #=> [:@@var2]
|
|
*/
|
|
|
|
VALUE
|
|
rb_mod_class_variables(int argc, const VALUE *argv, VALUE mod)
|
|
{
|
|
bool inherit = true;
|
|
st_table *tbl;
|
|
|
|
if (rb_check_arity(argc, 0, 1)) inherit = RTEST(argv[0]);
|
|
if (inherit) {
|
|
tbl = mod_cvar_of(mod, 0);
|
|
}
|
|
else {
|
|
tbl = mod_cvar_at(mod, 0);
|
|
}
|
|
return cvar_list(tbl);
|
|
}
|
|
|
|
/*
|
|
* call-seq:
|
|
* remove_class_variable(sym) -> obj
|
|
*
|
|
* Removes the named class variable from the receiver, returning that
|
|
* variable's value.
|
|
*
|
|
* class Example
|
|
* @@var = 99
|
|
* puts remove_class_variable(:@@var)
|
|
* p(defined? @@var)
|
|
* end
|
|
*
|
|
* <em>produces:</em>
|
|
*
|
|
* 99
|
|
* nil
|
|
*/
|
|
|
|
VALUE
|
|
rb_mod_remove_cvar(VALUE mod, VALUE name)
|
|
{
|
|
const ID id = id_for_var_message(mod, name, class, "wrong class variable name %1$s");
|
|
st_data_t val, n = id;
|
|
|
|
if (!id) {
|
|
goto not_defined;
|
|
}
|
|
rb_check_frozen(mod);
|
|
if (RCLASS_IV_TBL(mod) && st_delete(RCLASS_IV_TBL(mod), &n, &val)) {
|
|
return (VALUE)val;
|
|
}
|
|
if (rb_cvar_defined(mod, id)) {
|
|
rb_name_err_raise("cannot remove %1$s for %2$s", mod, ID2SYM(id));
|
|
}
|
|
not_defined:
|
|
rb_name_err_raise("class variable %1$s not defined for %2$s",
|
|
mod, name);
|
|
UNREACHABLE_RETURN(Qundef);
|
|
}
|
|
|
|
VALUE
|
|
rb_iv_get(VALUE obj, const char *name)
|
|
{
|
|
ID id = rb_check_id_cstr(name, strlen(name), rb_usascii_encoding());
|
|
|
|
if (!id) {
|
|
return Qnil;
|
|
}
|
|
return rb_ivar_get(obj, id);
|
|
}
|
|
|
|
VALUE
|
|
rb_iv_set(VALUE obj, const char *name, VALUE val)
|
|
{
|
|
ID id = rb_intern(name);
|
|
|
|
return rb_ivar_set(obj, id, val);
|
|
}
|
|
|
|
/* tbl = xx(obj); tbl[key] = value; */
|
|
int
|
|
rb_class_ivar_set(VALUE obj, ID key, VALUE value)
|
|
{
|
|
if (!RCLASS_IV_TBL(obj)) {
|
|
RCLASS_IV_TBL(obj) = st_init_numtable();
|
|
}
|
|
|
|
st_table *tbl = RCLASS_IV_TBL(obj);
|
|
int result = lock_st_insert(tbl, (st_data_t)key, (st_data_t)value);
|
|
RB_OBJ_WRITTEN(obj, Qundef, value);
|
|
return result;
|
|
}
|
|
|
|
static int
|
|
tbl_copy_i(st_data_t key, st_data_t value, st_data_t data)
|
|
{
|
|
RB_OBJ_WRITTEN((VALUE)data, Qundef, (VALUE)value);
|
|
return ST_CONTINUE;
|
|
}
|
|
|
|
void
|
|
rb_iv_tbl_copy(VALUE dst, VALUE src)
|
|
{
|
|
st_table *orig_tbl = RCLASS_IV_TBL(src);
|
|
st_table *new_tbl = st_copy(orig_tbl);
|
|
st_foreach(new_tbl, tbl_copy_i, (st_data_t)dst);
|
|
RCLASS_IV_TBL(dst) = new_tbl;
|
|
}
|
|
|
|
MJIT_FUNC_EXPORTED rb_const_entry_t *
|
|
rb_const_lookup(VALUE klass, ID id)
|
|
{
|
|
struct rb_id_table *tbl = RCLASS_CONST_TBL(klass);
|
|
|
|
if (tbl) {
|
|
VALUE val;
|
|
bool r;
|
|
RB_VM_LOCK_ENTER();
|
|
{
|
|
r = rb_id_table_lookup(tbl, id, &val);
|
|
}
|
|
RB_VM_LOCK_LEAVE();
|
|
|
|
if (r) return (rb_const_entry_t *)val;
|
|
}
|
|
return NULL;
|
|
}
|