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Implement object shapes for T_CLASS and T_MODULE (#6637)

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* Avoid RCLASS_IV_TBL in marshal.c
* Avoid RCLASS_IV_TBL for class names
* Avoid RCLASS_IV_TBL for autoload
* Avoid RCLASS_IV_TBL for class variables
* Avoid copying RCLASS_IV_TBL onto ICLASSes
* Use object shapes for Class and Module IVs
This commit is contained in:
John Hawthorn 2022-10-31 14:05:37 -07:00 committed by GitHub
parent 2b39640b0b
commit 02f1554224
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GPG key ID: 4AEE18F83AFDEB23
Notes: git 2022-10-31 21:06:02 +00:00 
Merged-By: jhawthorn <john@hawthorn.email>
10 changed files with 266 additions and 203 deletions
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21
class.c
View file

@ -213,7 +213,6 @@ class_alloc(VALUE flags, VALUE klass)
#endif
/* ZALLOC
RCLASS_IV_TBL(obj) = 0;
RCLASS_CONST_TBL(obj) = 0;
RCLASS_M_TBL(obj) = 0;
RCLASS_IV_INDEX_TBL(obj) = 0;
@ -402,23 +401,19 @@ class_init_copy_check(VALUE clone, VALUE orig)
static void
copy_tables(VALUE clone, VALUE orig)
{
if (RCLASS_IV_TBL(clone)) {
st_free_table(RCLASS_IV_TBL(clone));
RCLASS_IV_TBL(clone) = 0;
}
if (RCLASS_CONST_TBL(clone)) {
rb_free_const_table(RCLASS_CONST_TBL(clone));
RCLASS_CONST_TBL(clone) = 0;
}
RCLASS_M_TBL(clone) = 0;
if (RCLASS_IV_TBL(orig)) {
if (!RB_TYPE_P(clone, T_ICLASS)) {
st_data_t id;
rb_iv_tbl_copy(clone, orig);
CONST_ID(id, "__tmp_classpath__");
st_delete(RCLASS_IV_TBL(clone), &id, 0);
rb_attr_delete(clone, id);
CONST_ID(id, "__classpath__");
st_delete(RCLASS_IV_TBL(clone), &id, 0);
rb_attr_delete(clone, id);
}
if (RCLASS_CONST_TBL(orig)) {
struct clone_const_arg arg;
@ -520,7 +515,6 @@ rb_mod_init_copy(VALUE clone, VALUE orig)
prev_clone_p = clone_p;
RCLASS_M_TBL(clone_p) = RCLASS_M_TBL(p);
RCLASS_CONST_TBL(clone_p) = RCLASS_CONST_TBL(p);
RCLASS_IV_TBL(clone_p) = RCLASS_IV_TBL(p);
RCLASS_ALLOCATOR(clone_p) = RCLASS_ALLOCATOR(p);
if (RB_TYPE_P(clone, T_CLASS)) {
RCLASS_SET_INCLUDER(clone_p, clone);
@ -607,9 +601,7 @@ rb_singleton_class_clone_and_attach(VALUE obj, VALUE attach)
RCLASS_SET_SUPER(clone, RCLASS_SUPER(klass));
RCLASS_ALLOCATOR(clone) = RCLASS_ALLOCATOR(klass);
if (RCLASS_IV_TBL(klass)) {
rb_iv_tbl_copy(clone, klass);
}
rb_iv_tbl_copy(clone, klass);
if (RCLASS_CONST_TBL(klass)) {
struct clone_const_arg arg;
arg.tbl = RCLASS_CONST_TBL(clone) = rb_id_table_create(0);
@ -1062,13 +1054,10 @@ rb_include_class_new(VALUE module, VALUE super)
module = METACLASS_OF(module);
}
RUBY_ASSERT(!RB_TYPE_P(module, T_ICLASS));
if (!RCLASS_IV_TBL(module)) {
RCLASS_IV_TBL(module) = st_init_numtable();
}
if (!RCLASS_CONST_TBL(module)) {
RCLASS_CONST_TBL(module) = rb_id_table_create(0);
}
RCLASS_IV_TBL(klass) = RCLASS_IV_TBL(module);
RCLASS_CVC_TBL(klass) = RCLASS_CVC_TBL(module);
RCLASS_CONST_TBL(klass) = RCLASS_CONST_TBL(module);

23
gc.c
View file

@ -3447,8 +3447,8 @@ obj_free(rb_objspace_t *objspace, VALUE obj)
case T_CLASS:
rb_id_table_free(RCLASS_M_TBL(obj));
cc_table_free(objspace, obj, FALSE);
if (RCLASS_IV_TBL(obj)) {
st_free_table(RCLASS_IV_TBL(obj));
if (RCLASS_IVPTR(obj)) {
xfree(RCLASS_IVPTR(obj));
}
if (RCLASS_CONST_TBL(obj)) {
rb_free_const_table(RCLASS_CONST_TBL(obj));
@ -4865,15 +4865,11 @@ obj_memsize_of(VALUE obj, int use_all_types)
if (RCLASS_M_TBL(obj)) {
size += rb_id_table_memsize(RCLASS_M_TBL(obj));
}
if (RCLASS_IV_TBL(obj)) {
size += st_memsize(RCLASS_IV_TBL(obj));
}
// class IV sizes are allocated as powers of two
size += SIZEOF_VALUE << bit_length(RCLASS_IV_COUNT(obj));
if (RCLASS_CVC_TBL(obj)) {
size += rb_id_table_memsize(RCLASS_CVC_TBL(obj));
}
if (RCLASS_EXT(obj)->iv_tbl) {
size += st_memsize(RCLASS_EXT(obj)->iv_tbl);
}
if (RCLASS_EXT(obj)->const_tbl) {
size += rb_id_table_memsize(RCLASS_EXT(obj)->const_tbl);
}
@ -7212,7 +7208,9 @@ gc_mark_children(rb_objspace_t *objspace, VALUE obj)
mark_m_tbl(objspace, RCLASS_M_TBL(obj));
cc_table_mark(objspace, obj);
mark_tbl_no_pin(objspace, RCLASS_IV_TBL(obj));
for (attr_index_t i = 0; i < RCLASS_IV_COUNT(obj); i++) {
gc_mark(objspace, RCLASS_IVPTR(obj)[i]);
}
mark_const_tbl(objspace, RCLASS_CONST_TBL(obj));
break;
@ -10439,7 +10437,9 @@ gc_update_object_references(rb_objspace_t *objspace, VALUE obj)
update_cvc_tbl(objspace, obj);
update_superclasses(objspace, obj);
gc_update_tbl_refs(objspace, RCLASS_IV_TBL(obj));
for (attr_index_t i = 0; i < RCLASS_IV_COUNT(obj); i++) {
UPDATE_IF_MOVED(objspace, RCLASS_IVPTR(obj)[i]);
}
update_class_ext(objspace, RCLASS_EXT(obj));
update_const_tbl(objspace, RCLASS_CONST_TBL(obj));
@ -10454,9 +10454,6 @@ gc_update_object_references(rb_objspace_t *objspace, VALUE obj)
UPDATE_IF_MOVED(objspace, RCLASS(obj)->super);
}
if (!RCLASS_EXT(obj)) break;
if (RCLASS_IV_TBL(obj)) {
gc_update_tbl_refs(objspace, RCLASS_IV_TBL(obj));
}
update_class_ext(objspace, RCLASS_EXT(obj));
update_m_tbl(objspace, RCLASS_CALLABLE_M_TBL(obj));
update_cc_tbl(objspace, obj);

4
internal/class.h
View file

@ -33,7 +33,7 @@ struct rb_cvar_class_tbl_entry {
};
struct rb_classext_struct {
struct st_table *iv_tbl;
VALUE *iv_ptr;
struct rb_id_table *const_tbl;
struct rb_id_table *callable_m_tbl;
struct rb_id_table *cc_tbl; /* ID -> [[ci, cc1], cc2, ...] */
@ -75,9 +75,9 @@ typedef struct rb_classext_struct rb_classext_t;
#else
# define RCLASS_EXT(c) (RCLASS(c)->ptr)
#endif
#define RCLASS_IV_TBL(c) (RCLASS_EXT(c)->iv_tbl)
#define RCLASS_CONST_TBL(c) (RCLASS_EXT(c)->const_tbl)
#define RCLASS_M_TBL(c) (RCLASS(c)->m_tbl)
#define RCLASS_IVPTR(c) (RCLASS_EXT(c)->iv_ptr)
#define RCLASS_CALLABLE_M_TBL(c) (RCLASS_EXT(c)->callable_m_tbl)
#define RCLASS_CC_TBL(c) (RCLASS_EXT(c)->cc_tbl)
#define RCLASS_CVC_TBL(c) (RCLASS_EXT(c)->cvc_tbl)

2
internal/variable.h
View file

@ -24,7 +24,6 @@ void rb_gc_update_global_tbl(void);
size_t rb_generic_ivar_memsize(VALUE);
VALUE rb_search_class_path(VALUE);
VALUE rb_attr_delete(VALUE, ID);
VALUE rb_ivar_lookup(VALUE obj, ID id, VALUE undef);
void rb_autoload_str(VALUE mod, ID id, VALUE file);
VALUE rb_autoload_at_p(VALUE, ID, int);
NORETURN(VALUE rb_mod_const_missing(VALUE,VALUE));
@ -49,6 +48,7 @@ void rb_iv_tbl_copy(VALUE dst, VALUE src);
RUBY_SYMBOL_EXPORT_END
MJIT_SYMBOL_EXPORT_BEGIN
VALUE rb_ivar_lookup(VALUE obj, ID id, VALUE undef);
VALUE rb_gvar_get(ID);
VALUE rb_gvar_set(ID, VALUE);
VALUE rb_gvar_defined(ID);

2
marshal.c
View file

@ -523,7 +523,7 @@ hash_each(VALUE key, VALUE value, VALUE v)
#define SINGLETON_DUMP_UNABLE_P(klass) \
(rb_id_table_size(RCLASS_M_TBL(klass)) > 0 || \
(RCLASS_IV_TBL(klass) && RCLASS_IV_TBL(klass)->num_entries > 1))
rb_ivar_count(klass) > 1)
static void
w_extended(VALUE klass, struct dump_arg *arg, int check)

18
object.c
View file

@ -298,20 +298,22 @@ init_copy(VALUE dest, VALUE obj)
rb_copy_generic_ivar(dest, obj);
rb_gc_copy_finalizer(dest, obj);
rb_shape_t *shape_to_set = rb_shape_get_shape(obj);
if (!RB_TYPE_P(obj, T_CLASS) && !RB_TYPE_P(obj, T_MODULE)) {
rb_shape_t *shape_to_set = rb_shape_get_shape(obj);
// If the object is frozen, the "dup"'d object will *not* be frozen,
// so we need to copy the frozen shape's parent to the new object.
if (rb_shape_frozen_shape_p(shape_to_set)) {
shape_to_set = rb_shape_get_shape_by_id(shape_to_set->parent_id);
// If the object is frozen, the "dup"'d object will *not* be frozen,
// so we need to copy the frozen shape's parent to the new object.
if (rb_shape_frozen_shape_p(shape_to_set)) {
shape_to_set = rb_shape_get_shape_by_id(shape_to_set->parent_id);
}
// shape ids are different
rb_shape_set_shape(dest, shape_to_set);
}
if (RB_TYPE_P(obj, T_OBJECT)) {
rb_obj_copy_ivar(dest, obj);
}
// shape ids are different
rb_shape_set_shape(dest, shape_to_set);
}
static VALUE immutable_obj_clone(VALUE obj, VALUE kwfreeze);

9
shape.c
View file

@ -54,9 +54,10 @@ rb_shape_get_shape_by_id_without_assertion(shape_id_t shape_id)
}
#if !SHAPE_IN_BASIC_FLAGS
static inline shape_id_t
RCLASS_SHAPE_ID(VALUE obj)
shape_id_t
rb_rclass_shape_id(VALUE obj)
{
RUBY_ASSERT(RB_TYPE_P(obj, T_CLASS) || RB_TYPE_P(obj, T_MODULE));
return RCLASS_EXT(obj)->shape_id;
}
@ -115,7 +116,9 @@ static rb_shape_t*
get_next_shape_internal(rb_shape_t* shape, ID id, VALUE obj, enum shape_type shape_type)
{
rb_shape_t *res = NULL;
RUBY_ASSERT(SHAPE_FROZEN != (enum shape_type)shape->type);
RUBY_ASSERT(SHAPE_FROZEN != (enum shape_type)shape->type || RB_TYPE_P(obj, T_MODULE) || RB_TYPE_P(obj, T_CLASS));
RB_VM_LOCK_ENTER();
{
if (rb_shape_lookup_id(shape, id, shape_type)) {

24
shape.h
View file

@ -90,6 +90,13 @@ ROBJECT_SET_SHAPE_ID(VALUE obj, shape_id_t shape_id)
RBASIC_SET_SHAPE_ID(obj, shape_id);
}
static inline shape_id_t
RCLASS_SHAPE_ID(VALUE obj)
{
RUBY_ASSERT(RB_TYPE_P(obj, T_CLASS) || RB_TYPE_P(obj, T_MODULE));
return RBASIC_SHAPE_ID(obj);
}
#else
static inline shape_id_t
@ -105,6 +112,15 @@ ROBJECT_SET_SHAPE_ID(VALUE obj, shape_id_t shape_id)
RBASIC(obj)->flags &= SHAPE_FLAG_MASK;
RBASIC(obj)->flags |= ((VALUE)(shape_id) << SHAPE_FLAG_SHIFT);
}
MJIT_SYMBOL_EXPORT_BEGIN
shape_id_t rb_rclass_shape_id(VALUE obj);
MJIT_SYMBOL_EXPORT_END
static inline shape_id_t RCLASS_SHAPE_ID(VALUE obj) {
return rb_rclass_shape_id(obj);
}
#endif
bool rb_shape_root_shape_p(rb_shape_t* shape);
@ -134,6 +150,14 @@ ROBJECT_IV_COUNT(VALUE obj)
return ivc;
}
static inline uint32_t
RCLASS_IV_COUNT(VALUE obj)
{
RUBY_ASSERT(RB_TYPE_P(obj, RUBY_T_CLASS) || RB_TYPE_P(obj, RUBY_T_MODULE));
uint32_t ivc = rb_shape_get_shape_by_id(RCLASS_SHAPE_ID(obj))->next_iv_index;
return ivc;
}
rb_shape_t * rb_shape_alloc(ID edge_name, rb_shape_t * parent);
rb_shape_t * rb_shape_alloc_with_parent_id(ID edge_name, shape_id_t parent_id);

338
variable.c
View file

@ -111,18 +111,16 @@ rb_namespace_p(VALUE obj)
static VALUE
classname(VALUE klass, int *permanent)
{
st_table *ivtbl;
st_data_t n;
*permanent = 0;
if (!RCLASS_EXT(klass)) return Qnil;
if (!(ivtbl = RCLASS_IV_TBL(klass))) return Qnil;
if (st_lookup(ivtbl, (st_data_t)classpath, &n)) {
VALUE classpathv = rb_ivar_lookup(klass, classpath, Qnil);
if (RTEST(classpathv)) {
*permanent = 1;
return (VALUE)n;
return classpathv;
}
if (st_lookup(ivtbl, (st_data_t)tmp_classpath, &n)) return (VALUE)n;
return Qnil;
return rb_ivar_lookup(klass, tmp_classpath, Qnil);;
}
/*
@ -946,6 +944,8 @@ gen_ivtbl_get_unlocked(VALUE obj, ID id, struct gen_ivtbl **ivtbl)
MJIT_FUNC_EXPORTED int
rb_gen_ivtbl_get(VALUE obj, ID id, struct gen_ivtbl **ivtbl)
{
RUBY_ASSERT(!RB_TYPE_P(obj, T_ICLASS));
st_data_t data;
int r = 0;
@ -1116,54 +1116,6 @@ gen_ivtbl_count(const struct gen_ivtbl *ivtbl)
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)
{
@ -1181,21 +1133,39 @@ rb_ivar_lookup(VALUE obj, ID id, VALUE undef)
case T_CLASS:
case T_MODULE:
{
st_data_t val;
bool found;
VALUE val;
if (RCLASS_IV_TBL(obj) &&
lock_st_lookup(RCLASS_IV_TBL(obj), (st_data_t)id, &val)) {
if (rb_is_instance_id(id) &&
RB_VM_LOCK_ENTER();
{
#if !SHAPE_IN_BASIC_FLAGS
shape_id = RCLASS_SHAPE_ID(obj);
#endif
attr_index_t index = 0;
shape = rb_shape_get_shape_by_id(shape_id);
found = rb_shape_get_iv_index(shape, id, &index);
if (found) {
ivar_list = RCLASS_IVPTR(obj);
RUBY_ASSERT(ivar_list);
val = ivar_list[index];
}
else {
val = undef;
}
}
RB_VM_LOCK_LEAVE();
if (found &&
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;
rb_raise(rb_eRactorIsolationError,
"can not get unshareable values from instance variables of classes/modules from non-main Ractors");
}
return val;
}
case T_OBJECT:
{
@ -1247,19 +1217,25 @@ rb_ivar_delete(VALUE obj, ID id, VALUE undef)
{
rb_check_frozen(obj);
VALUE val = Qnil;
VALUE val = undef;
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;
RB_VM_LOCK_ENTER();
{
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 = RCLASS_IVPTR(obj)[index];
RCLASS_IVPTR(obj)[index] = Qundef;
}
}
RB_VM_LOCK_LEAVE();
break;
case T_OBJECT: {
rb_shape_t * shape = rb_shape_get_shape(obj);
@ -1267,7 +1243,6 @@ rb_ivar_delete(VALUE obj, ID id, VALUE undef)
rb_shape_transition_shape_remove_ivar(obj, id, shape);
val = ROBJECT_IVPTR(obj)[index];
ROBJECT_IVPTR(obj)[index] = Qundef;
return val;
}
break;
@ -1281,14 +1256,13 @@ rb_ivar_delete(VALUE obj, ID id, VALUE undef)
rb_gen_ivtbl_get(obj, id, &ivtbl);
val = ivtbl->ivptr[index];
ivtbl->ivptr[index] = Qundef;
return val;
}
break;
}
}
return undef;
return val;
}
VALUE
@ -1553,10 +1527,9 @@ ivar_set(VALUE obj, ID id, VALUE val)
}
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);
@ -1587,13 +1560,7 @@ 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:
return RBOOL(RCLASS_IV_TBL(obj) && lock_st_is_member(RCLASS_IV_TBL(obj), (st_data_t)id));
default:
return RBOOL(rb_shape_get_iv_index(rb_shape_get_shape(obj), id, &index));
}
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);
@ -1636,6 +1603,15 @@ gen_ivar_each(VALUE obj, rb_ivar_foreach_callback_func *func, st_data_t arg)
iterate_over_shapes_with_callback(shape, ivtbl->ivptr, func, arg);
}
static void
class_ivar_each(VALUE obj, rb_ivar_foreach_callback_func *func, st_data_t arg)
{
RUBY_ASSERT(RB_TYPE_P(obj, T_CLASS) || RB_TYPE_P(obj, T_MODULE));
rb_shape_t* shape = rb_shape_get_shape(obj);
iterate_over_shapes_with_callback(shape, RCLASS_IVPTR(obj), func, arg);
}
void
rb_copy_generic_ivar(VALUE clone, VALUE obj)
{
@ -1720,13 +1696,11 @@ rb_ivar_foreach(VALUE obj, rb_ivar_foreach_callback_func *func, st_data_t arg)
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();
RB_VM_LOCK_ENTER();
{
class_ivar_each(obj, func, arg);
}
RB_VM_LOCK_LEAVE();
break;
default:
if (FL_TEST(obj, FL_EXIVAR)) {
@ -1739,8 +1713,6 @@ rb_ivar_foreach(VALUE obj, rb_ivar_foreach_callback_func *func, st_data_t arg)
st_index_t
rb_ivar_count(VALUE obj)
{
st_table *tbl;
if (SPECIAL_CONST_P(obj)) return 0;
switch (BUILTIN_TYPE(obj)) {
@ -1758,8 +1730,22 @@ rb_ivar_count(VALUE obj)
break;
case T_CLASS:
case T_MODULE:
if ((tbl = RCLASS_IV_TBL(obj)) != 0) {
return tbl->num_entries;
if (rb_shape_get_shape(obj)->next_iv_index > 0) {
st_index_t count = 0;
RB_VM_LOCK_ENTER();
{
st_index_t i, num = rb_shape_get_shape(obj)->next_iv_index;
const VALUE *const ivptr = RCLASS_IVPTR(obj);
for (i = count = 0; i < num; ++i) {
if (ivptr[i] != Qundef) {
count++;
}
}
}
RB_VM_LOCK_LEAVE();
return count;
}
break;
default:
@ -1879,11 +1865,12 @@ rb_obj_remove_instance_variable(VALUE obj, VALUE name)
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;
}
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 = RCLASS_IVPTR(obj)[index];
RCLASS_IVPTR(obj)[index] = Qundef;
return val;
}
break;
case T_OBJECT: {
@ -2030,8 +2017,22 @@ autoload_data(VALUE mod, ID id)
struct st_table *tbl;
st_data_t val;
// If we are called with a non-origin ICLASS, fetch the autoload data from
// the original module.
if (RB_TYPE_P(mod, T_ICLASS)) {
if (FL_TEST_RAW(mod, RICLASS_IS_ORIGIN)) {
return 0;
} else {
mod = RBASIC(mod)->klass;
}
}
RUBY_ASSERT(RB_TYPE_P(mod, T_CLASS) || RB_TYPE_P(mod, T_MODULE));
// 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)) {
VALUE tbl_value = rb_ivar_lookup(mod, autoload, 0);
if (!tbl_value || !(tbl = check_autoload_table(tbl_value)) || !st_lookup(tbl, (st_data_t)id, &val)) {
return 0;
}
@ -2229,23 +2230,14 @@ autoload_feature_lookup_or_create(VALUE feature, struct autoload_data **autoload
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);
VALUE autoload_table_value = rb_ivar_lookup(module, autoload, 0);
if (autoload_table_value) {
return check_autoload_table(autoload_table_value);
} else {
autoload_table_value = TypedData_Wrap_Struct(0, &autoload_table_type, 0);
rb_class_ivar_set(module, autoload, autoload_table_value);
return (DATA_PTR(autoload_table_value) = st_init_numtable());
}
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
@ -2314,10 +2306,13 @@ autoload_delete(VALUE module, ID name)
{
RUBY_ASSERT_CRITICAL_SECTION_ENTER();
st_data_t value, load = 0, key = name;
st_data_t 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);
RUBY_ASSERT(RB_TYPE_P(module, T_CLASS) || RB_TYPE_P(module, T_MODULE));
VALUE table_value = rb_ivar_lookup(module, autoload, 0);
if (table_value) {
struct st_table *table = check_autoload_table(table_value);
st_delete(table, &key, &load);
@ -2342,8 +2337,7 @@ autoload_delete(VALUE module, ID name)
// 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);
rb_attr_delete(module, autoload);
}
}
}
@ -3129,10 +3123,7 @@ set_namespace_path_i(ID id, VALUE v, void *payload)
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);
}
rb_attr_delete(value, tmp_classpath);
return ID_TABLE_CONTINUE;
}
@ -3469,8 +3460,20 @@ original_module(VALUE 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);
if (RB_TYPE_P(klass, T_ICLASS)) {
if (FL_TEST_RAW(klass, RICLASS_IS_ORIGIN)) {
return 0;
} else {
// check the original module
klass = RBASIC(klass)->klass;
}
}
VALUE n = rb_ivar_lookup(klass, id, Qundef);
if (n == Qundef) return 0;
if (v) *v = n;
return 1;
}
static VALUE
@ -3489,8 +3492,6 @@ 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"",
@ -3498,7 +3499,7 @@ cvar_overtaken(VALUE front, VALUE target, ID id)
rb_class_name(original_module(target)));
}
if (BUILTIN_TYPE(front) == T_CLASS) {
st_delete(RCLASS_IV_TBL(front), &did, 0);
rb_ivar_delete(front, id, Qundef);
}
}
}
@ -3543,9 +3544,8 @@ find_cvar(VALUE klass, VALUE * front, VALUE * target, ID id)
static void
check_for_cvar_table(VALUE subclass, VALUE key)
{
st_table *tbl = RCLASS_IV_TBL(subclass);
if (tbl && st_lookup(tbl, key, NULL)) {
// Must not check ivar on ICLASS
if (!RB_TYPE_P(subclass, T_ICLASS) && RTEST(rb_ivar_defined(subclass, key))) {
RB_DEBUG_COUNTER_INC(cvar_class_invalidate);
ruby_vm_global_cvar_state++;
return;
@ -3688,9 +3688,9 @@ mod_cvar_at(VALUE mod, void *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);
}
mod = original_module(mod);
rb_ivar_foreach(mod, cv_i, (st_data_t)tbl);
return tbl;
}
@ -3793,13 +3793,14 @@ 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;
st_data_t val;
if (!id) {
goto not_defined;
}
rb_check_frozen(mod);
if (RCLASS_IV_TBL(mod) && st_delete(RCLASS_IV_TBL(mod), &n, &val)) {
val = rb_ivar_delete(mod, id, Qundef);
if (val != Qundef) {
return (VALUE)val;
}
if (rb_cvar_defined(mod, id)) {
@ -3834,30 +3835,63 @@ rb_iv_set(VALUE obj, const char *name, VALUE val)
int
rb_class_ivar_set(VALUE obj, ID key, VALUE value)
{
if (!RCLASS_IV_TBL(obj)) {
RCLASS_IV_TBL(obj) = st_init_numtable();
}
RUBY_ASSERT(RB_TYPE_P(obj, T_CLASS) || RB_TYPE_P(obj, T_MODULE));
int found;
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;
RB_VM_LOCK_ENTER();
{
rb_shape_t * shape = rb_shape_get_shape(obj);
attr_index_t idx;
found = rb_shape_get_iv_index(shape, key, &idx);
if (found) {
// Changing an existing instance variable
RUBY_ASSERT(RCLASS_IVPTR(obj));
RCLASS_IVPTR(obj)[idx] = value;
RB_OBJ_WRITTEN(obj, Qundef, value);
} else {
// Creating and setting a new instance variable
// Move to a shape which fits the new ivar
idx = shape->next_iv_index;
shape = rb_shape_get_next(shape, obj, key);
// We always allocate a power of two sized IV array. This way we
// only need to realloc when we expand into a new power of two size
if ((idx & (idx - 1)) == 0) {
size_t newsize = idx ? idx * 2 : 1;
REALLOC_N(RCLASS_IVPTR(obj), VALUE, newsize);
}
RUBY_ASSERT(RCLASS_IVPTR(obj));
RB_OBJ_WRITE(obj, &RCLASS_IVPTR(obj)[idx], value);
rb_shape_set_shape(obj, shape);
}
}
RB_VM_LOCK_LEAVE();
return found;
}
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);
tbl_copy_i(st_data_t key, st_data_t val, st_data_t dest) {
rb_class_ivar_set(dest, key, val);
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;
RUBY_ASSERT(rb_type(dst) == rb_type(src));
RUBY_ASSERT(RB_TYPE_P(dst, T_CLASS) || RB_TYPE_P(dst, T_MODULE));
RUBY_ASSERT(RCLASS_SHAPE_ID(dst) == ROOT_SHAPE_ID);
RUBY_ASSERT(!RCLASS_IVPTR(dst));
rb_ivar_foreach(src, tbl_copy_i, dst);
}
MJIT_FUNC_EXPORTED rb_const_entry_t *

28
vm_insnhelper.c
View file

@ -1169,7 +1169,23 @@ vm_getivar(VALUE obj, ID id, const rb_iseq_t *iseq, IVC ic, const struct rb_call
case T_CLASS:
case T_MODULE:
{
goto general_path;
if (UNLIKELY(!rb_ractor_main_p())) {
// For two reasons we can only use the fast path on the main
// ractor.
// First, only the main ractor is allowed to set ivars on classes
// and modules. So we can skip locking.
// Second, other ractors need to check the shareability of the
// values returned from the class ivars.
goto general_path;
}
ivar_list = RCLASS_IVPTR(obj);
#if !SHAPE_IN_BASIC_FLAGS
shape_id = RCLASS_SHAPE_ID(obj);
#endif
break;
}
default:
if (FL_TEST_RAW(obj, FL_EXIVAR)) {
@ -1507,15 +1523,13 @@ vm_getclassvariable(const rb_iseq_t *iseq, const rb_control_frame_t *reg_cfp, ID
{
const rb_cref_t *cref;
if (ic->entry && ic->entry->global_cvar_state == GET_GLOBAL_CVAR_STATE()) {
VALUE v = Qundef;
if (ic->entry && ic->entry->global_cvar_state == GET_GLOBAL_CVAR_STATE() && LIKELY(rb_ractor_main_p())) {
RB_DEBUG_COUNTER_INC(cvar_read_inline_hit);
if (st_lookup(RCLASS_IV_TBL(ic->entry->class_value), (st_data_t)id, &v) &&
LIKELY(rb_ractor_main_p())) {
VALUE v = rb_ivar_lookup(ic->entry->class_value, id, Qundef);
RUBY_ASSERT(v != Qundef);
return v;
}
return v;
}
cref = vm_get_cref(GET_EP());