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vm_method.c
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vm_method.c
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/*
* This file is included by vm.c
*/
#include "id_table.h"
#define METHOD_DEBUG 0
#if OPT_GLOBAL_METHOD_CACHE
#ifndef GLOBAL_METHOD_CACHE_SIZE
#define GLOBAL_METHOD_CACHE_SIZE 0x800
#endif
#define LSB_ONLY(x) ((x) & ~((x) - 1))
#define POWER_OF_2_P(x) ((x) == LSB_ONLY(x))
#if !POWER_OF_2_P(GLOBAL_METHOD_CACHE_SIZE)
# error GLOBAL_METHOD_CACHE_SIZE must be power of 2
#endif
#ifndef GLOBAL_METHOD_CACHE_MASK
#define GLOBAL_METHOD_CACHE_MASK (GLOBAL_METHOD_CACHE_SIZE-1)
#endif
#define GLOBAL_METHOD_CACHE_KEY(c,m) ((((c)>>3)^(m))&(global_method_cache.mask))
#define GLOBAL_METHOD_CACHE(c,m) (global_method_cache.entries + GLOBAL_METHOD_CACHE_KEY(c,m))
#else
#define GLOBAL_METHOD_CACHE(c,m) (rb_bug("global method cache disabled improperly"), NULL)
#endif
static void rb_vm_check_redefinition_opt_method(const rb_method_entry_t *me, VALUE klass);
#define object_id idObject_id
#define added idMethod_added
#define singleton_added idSingleton_method_added
#define removed idMethod_removed
#define singleton_removed idSingleton_method_removed
#define undefined idMethod_undefined
#define singleton_undefined idSingleton_method_undefined
#define attached id__attached__
struct cache_entry {
rb_serial_t method_state;
rb_serial_t class_serial;
ID mid;
rb_method_entry_t* me;
VALUE defined_class;
};
#if OPT_GLOBAL_METHOD_CACHE
static struct {
unsigned int size;
unsigned int mask;
struct cache_entry *entries;
} global_method_cache = {
GLOBAL_METHOD_CACHE_SIZE,
GLOBAL_METHOD_CACHE_MASK,
};
#endif
#define ruby_running (GET_VM()->running)
/* int ruby_running = 0; */
static void
rb_class_clear_method_cache(VALUE klass, VALUE arg)
{
RCLASS_SERIAL(klass) = rb_next_class_serial();
rb_class_foreach_subclass(klass, rb_class_clear_method_cache, arg);
}
void
rb_clear_cache(void)
{
rb_warning("rb_clear_cache() is deprecated.");
INC_GLOBAL_METHOD_STATE();
INC_GLOBAL_CONSTANT_STATE();
}
void
rb_clear_constant_cache(void)
{
INC_GLOBAL_CONSTANT_STATE();
}
void
rb_clear_method_cache_by_class(VALUE klass)
{
if (klass && klass != Qundef) {
int global = klass == rb_cBasicObject || klass == rb_cObject || klass == rb_mKernel;
if (RUBY_DTRACE_METHOD_CACHE_CLEAR_ENABLED()) {
RUBY_DTRACE_METHOD_CACHE_CLEAR(global ? "global" : rb_class2name(klass), rb_sourcefile(), rb_sourceline());
}
if (global) {
INC_GLOBAL_METHOD_STATE();
}
else {
rb_class_clear_method_cache(klass, Qnil);
}
if (RB_TYPE_P(klass, T_MODULE)) {
rb_subclass_entry_t *entry = RCLASS_EXT(klass)->subclasses;
for (; entry != NULL; entry = entry->next) {
struct rb_id_table *table = RCLASS_CALLABLE_M_TBL(entry->klass);
if (table)rb_id_table_clear(table);
}
}
}
}
VALUE
rb_f_notimplement(int argc, const VALUE *argv, VALUE obj)
{
rb_notimplement();
UNREACHABLE;
}
static void
rb_define_notimplement_method_id(VALUE mod, ID id, rb_method_visibility_t visi)
{
rb_add_method(mod, id, VM_METHOD_TYPE_NOTIMPLEMENTED, (void *)1, visi);
}
void
rb_add_method_cfunc(VALUE klass, ID mid, VALUE (*func)(ANYARGS), int argc, rb_method_visibility_t visi)
{
if (argc < -2 || 15 < argc) rb_raise(rb_eArgError, "arity out of range: %d for -2..15", argc);
if (func != rb_f_notimplement) {
rb_method_cfunc_t opt;
opt.func = func;
opt.argc = argc;
rb_add_method(klass, mid, VM_METHOD_TYPE_CFUNC, &opt, visi);
}
else {
rb_define_notimplement_method_id(klass, mid, visi);
}
}
static void
rb_method_definition_release(rb_method_definition_t *def)
{
if (def != NULL) {
const int count = def->alias_count;
VM_ASSERT(count >= 0);
if (count == 0) {
if (METHOD_DEBUG) fprintf(stderr, "-%p-%s:%d\n", def, rb_id2name(def->original_id), count);
xfree(def);
}
else {
if (METHOD_DEBUG) fprintf(stderr, "-%p-%s:%d->%d\n", def, rb_id2name(def->original_id), count, count-1);
def->alias_count--;
}
}
}
void
rb_free_method_entry(const rb_method_entry_t *me)
{
rb_method_definition_release(me->def);
}
static inline rb_method_entry_t *search_method(VALUE klass, ID id, VALUE *defined_class_ptr);
static int rb_method_definition_eq(const rb_method_definition_t *d1, const rb_method_definition_t *d2);
static inline rb_method_entry_t *
lookup_method_table(VALUE klass, ID id)
{
st_data_t body;
struct rb_id_table *m_tbl = RCLASS_M_TBL(klass);
if (rb_id_table_lookup(m_tbl, id, &body)) {
return (rb_method_entry_t *) body;
}
else {
return 0;
}
}
static VALUE
(*call_cfunc_invoker_func(int argc))(VALUE (*func)(ANYARGS), VALUE recv, int argc, const VALUE *)
{
switch (argc) {
case -2: return &call_cfunc_m2;
case -1: return &call_cfunc_m1;
case 0: return &call_cfunc_0;
case 1: return &call_cfunc_1;
case 2: return &call_cfunc_2;
case 3: return &call_cfunc_3;
case 4: return &call_cfunc_4;
case 5: return &call_cfunc_5;
case 6: return &call_cfunc_6;
case 7: return &call_cfunc_7;
case 8: return &call_cfunc_8;
case 9: return &call_cfunc_9;
case 10: return &call_cfunc_10;
case 11: return &call_cfunc_11;
case 12: return &call_cfunc_12;
case 13: return &call_cfunc_13;
case 14: return &call_cfunc_14;
case 15: return &call_cfunc_15;
default:
rb_bug("call_cfunc_func: unsupported length: %d", argc);
}
}
static void
setup_method_cfunc_struct(rb_method_cfunc_t *cfunc, VALUE (*func)(), int argc)
{
cfunc->func = func;
cfunc->argc = argc;
cfunc->invoker = call_cfunc_invoker_func(argc);
}
static void
method_definition_set(const rb_method_entry_t *me, rb_method_definition_t *def, void *opts)
{
*(rb_method_definition_t **)&me->def = def;
if (opts != NULL) {
switch (def->type) {
case VM_METHOD_TYPE_ISEQ:
{
rb_method_iseq_t *iseq_body = (rb_method_iseq_t *)opts;
rb_cref_t *method_cref, *cref = iseq_body->cref;
/* setup iseq first (before invoking GC) */
RB_OBJ_WRITE(me, &def->body.iseq.iseqptr, iseq_body->iseqptr);
if (0) vm_cref_dump("rb_method_definition_create", cref);
if (cref) {
method_cref = cref;
}
else {
method_cref = vm_cref_new_toplevel(GET_THREAD()); /* TODO: can we reuse? */
}
RB_OBJ_WRITE(me, &def->body.iseq.cref, method_cref);
return;
}
case VM_METHOD_TYPE_CFUNC:
{
rb_method_cfunc_t *cfunc = (rb_method_cfunc_t *)opts;
setup_method_cfunc_struct(&def->body.cfunc, cfunc->func, cfunc->argc);
return;
}
case VM_METHOD_TYPE_ATTRSET:
case VM_METHOD_TYPE_IVAR:
{
rb_thread_t *th = GET_THREAD();
rb_control_frame_t *cfp;
int line;
def->body.attr.id = (ID)(VALUE)opts;
cfp = rb_vm_get_ruby_level_next_cfp(th, th->cfp);
if (cfp && (line = rb_vm_get_sourceline(cfp))) {
VALUE location = rb_ary_new3(2, cfp->iseq->body->location.path, INT2FIX(line));
RB_OBJ_WRITE(me, &def->body.attr.location, rb_ary_freeze(location));
}
else {
VM_ASSERT(def->body.attr.location == 0);
}
return;
}
case VM_METHOD_TYPE_BMETHOD:
RB_OBJ_WRITE(me, &def->body.proc, (VALUE)opts);
return;
case VM_METHOD_TYPE_NOTIMPLEMENTED:
setup_method_cfunc_struct(&def->body.cfunc, rb_f_notimplement, -1);
return;
case VM_METHOD_TYPE_OPTIMIZED:
def->body.optimize_type = (enum method_optimized_type)opts;
return;
case VM_METHOD_TYPE_REFINED:
{
const rb_method_refined_t *refined = (rb_method_refined_t *)opts;
RB_OBJ_WRITE(me, &def->body.refined.orig_me, refined->orig_me);
RB_OBJ_WRITE(me, &def->body.refined.owner, refined->owner);
return;
}
case VM_METHOD_TYPE_ALIAS:
RB_OBJ_WRITE(me, &def->body.alias.original_me, (rb_method_entry_t *)opts);
return;
case VM_METHOD_TYPE_ZSUPER:
case VM_METHOD_TYPE_UNDEF:
case VM_METHOD_TYPE_MISSING:
return;
}
}
}
static void
method_definition_reset(const rb_method_entry_t *me)
{
rb_method_definition_t *def = me->def;
switch(def->type) {
case VM_METHOD_TYPE_ISEQ:
RB_OBJ_WRITTEN(me, Qundef, def->body.iseq.iseqptr);
RB_OBJ_WRITTEN(me, Qundef, def->body.iseq.cref);
break;
case VM_METHOD_TYPE_ATTRSET:
case VM_METHOD_TYPE_IVAR:
RB_OBJ_WRITTEN(me, Qundef, def->body.attr.location);
break;
case VM_METHOD_TYPE_BMETHOD:
RB_OBJ_WRITTEN(me, Qundef, def->body.proc);
break;
case VM_METHOD_TYPE_REFINED:
RB_OBJ_WRITTEN(me, Qundef, def->body.refined.orig_me);
RB_OBJ_WRITTEN(me, Qundef, def->body.refined.owner);
break;
case VM_METHOD_TYPE_ALIAS:
RB_OBJ_WRITTEN(me, Qundef, def->body.alias.original_me);
break;
case VM_METHOD_TYPE_CFUNC:
case VM_METHOD_TYPE_ZSUPER:
case VM_METHOD_TYPE_MISSING:
case VM_METHOD_TYPE_OPTIMIZED:
case VM_METHOD_TYPE_UNDEF:
case VM_METHOD_TYPE_NOTIMPLEMENTED:
break;
}
}
static rb_method_definition_t *
method_definition_create(rb_method_type_t type, ID mid)
{
rb_method_definition_t *def;
def = ZALLOC(rb_method_definition_t);
def->type = type;
def->original_id = mid;
return def;
}
static rb_method_definition_t *
method_definition_addref(rb_method_definition_t *def)
{
def->alias_count++;
if (METHOD_DEBUG) fprintf(stderr, "+%p-%s:%d\n", def, rb_id2name(def->original_id), def->alias_count);
return def;
}
static rb_method_entry_t *
rb_method_entry_alloc(ID called_id, VALUE owner, VALUE defined_class, const rb_method_definition_t *def)
{
rb_method_entry_t *me = (rb_method_entry_t *)rb_imemo_new(imemo_ment, (VALUE)def, (VALUE)called_id, owner, defined_class);
return me;
}
static VALUE
filter_defined_class(VALUE klass)
{
switch (BUILTIN_TYPE(klass)) {
case T_CLASS:
return klass;
case T_MODULE:
return 0;
case T_ICLASS:
break;
}
rb_bug("filter_defined_class: %s", rb_obj_info(klass));
}
rb_method_entry_t *
rb_method_entry_create(ID called_id, VALUE klass, rb_method_visibility_t visi, const rb_method_definition_t *def)
{
rb_method_entry_t *me = rb_method_entry_alloc(called_id, klass, filter_defined_class(klass), def);
METHOD_ENTRY_FLAGS_SET(me, visi, ruby_running ? FALSE : TRUE, rb_safe_level());
if (def != NULL) method_definition_reset(me);
return me;
}
const rb_method_entry_t *
rb_method_entry_clone(const rb_method_entry_t *src_me)
{
rb_method_entry_t *me = rb_method_entry_alloc(src_me->called_id, src_me->owner, src_me->defined_class,
method_definition_addref(src_me->def));
METHOD_ENTRY_FLAGS_COPY(me, src_me);
return me;
}
const rb_callable_method_entry_t *
rb_method_entry_complement_defined_class(const rb_method_entry_t *src_me, VALUE defined_class)
{
rb_method_entry_t *me = rb_method_entry_alloc(src_me->called_id, src_me->owner, defined_class,
method_definition_addref(src_me->def));
METHOD_ENTRY_FLAGS_COPY(me, src_me);
return (rb_callable_method_entry_t *)me;
}
void
rb_method_entry_copy(rb_method_entry_t *dst, const rb_method_entry_t *src)
{
*(rb_method_definition_t **)&dst->def = method_definition_addref(src->def);
method_definition_reset(dst);
dst->called_id = src->called_id;
RB_OBJ_WRITE((VALUE)dst, &dst->owner, src->owner);
RB_OBJ_WRITE((VALUE)dst, &dst->defined_class, src->defined_class);
METHOD_ENTRY_FLAGS_COPY(dst, src);
}
static void
make_method_entry_refined(VALUE owner, rb_method_entry_t *me)
{
if (me->def->type == VM_METHOD_TYPE_REFINED) {
return;
}
else {
struct {
const struct rb_method_entry_struct *orig_me;
VALUE owner;
} refined;
rb_vm_check_redefinition_opt_method(me, me->owner);
refined.orig_me = rb_method_entry_clone(me);
refined.owner = owner;
method_definition_set(me, method_definition_create(VM_METHOD_TYPE_REFINED, me->called_id), (void *)&refined);
METHOD_ENTRY_VISI_SET(me, METHOD_VISI_PUBLIC);
}
}
void
rb_add_refined_method_entry(VALUE refined_class, ID mid)
{
rb_method_entry_t *me = lookup_method_table(refined_class, mid);
if (me) {
make_method_entry_refined(refined_class, me);
rb_clear_method_cache_by_class(refined_class);
}
else {
rb_add_method(refined_class, mid, VM_METHOD_TYPE_REFINED, 0, METHOD_VISI_PUBLIC);
}
}
/*
* klass->method_table[mid] = method_entry(defined_class, visi, def)
*
* If def is given (!= NULL), then just use it and ignore original_id and otps.
* If not given, then make a new def with original_id and opts.
*/
static rb_method_entry_t *
rb_method_entry_make(VALUE klass, ID mid, VALUE defined_class, rb_method_visibility_t visi,
rb_method_type_t type, rb_method_definition_t *def, ID original_id, void *opts)
{
rb_method_entry_t *me;
struct rb_id_table *mtbl;
st_data_t data;
int make_refined = 0;
if (NIL_P(klass)) {
klass = rb_cObject;
}
if (!FL_TEST(klass, FL_SINGLETON) &&
type != VM_METHOD_TYPE_NOTIMPLEMENTED &&
type != VM_METHOD_TYPE_ZSUPER) {
switch (mid) {
case idInitialize:
case idInitialize_copy:
case idInitialize_clone:
case idInitialize_dup:
case idRespond_to_missing:
visi = METHOD_VISI_PRIVATE;
}
}
rb_frozen_class_p(klass);
if (FL_TEST(klass, RMODULE_IS_REFINEMENT)) {
VALUE refined_class = rb_refinement_module_get_refined_class(klass);
rb_add_refined_method_entry(refined_class, mid);
}
if (type == VM_METHOD_TYPE_REFINED) {
rb_method_entry_t *old_me = lookup_method_table(RCLASS_ORIGIN(klass), mid);
if (old_me) rb_vm_check_redefinition_opt_method(old_me, klass);
}
else {
klass = RCLASS_ORIGIN(klass);
}
mtbl = RCLASS_M_TBL(klass);
/* check re-definition */
if (rb_id_table_lookup(mtbl, mid, &data)) {
rb_method_entry_t *old_me = (rb_method_entry_t *)data;
rb_method_definition_t *old_def = old_me->def;
if (rb_method_definition_eq(old_def, def)) return old_me;
rb_vm_check_redefinition_opt_method(old_me, klass);
if (old_def->type == VM_METHOD_TYPE_REFINED) make_refined = 1;
if (RTEST(ruby_verbose) &&
type != VM_METHOD_TYPE_UNDEF &&
(old_def->alias_count == 0) &&
old_def->type != VM_METHOD_TYPE_UNDEF &&
old_def->type != VM_METHOD_TYPE_ZSUPER &&
old_def->type != VM_METHOD_TYPE_ALIAS) {
const rb_iseq_t *iseq = 0;
rb_warning("method redefined; discarding old %"PRIsVALUE, rb_id2str(mid));
switch (old_def->type) {
case VM_METHOD_TYPE_ISEQ:
iseq = def_iseq_ptr(old_def);
break;
case VM_METHOD_TYPE_BMETHOD:
iseq = rb_proc_get_iseq(old_def->body.proc, 0);
break;
default:
break;
}
if (iseq && !NIL_P(iseq->body->location.path)) {
int line = iseq->body->line_info_table ? FIX2INT(rb_iseq_first_lineno(iseq)) : 0;
rb_compile_warning(RSTRING_PTR(iseq->body->location.path), line,
"previous definition of %"PRIsVALUE" was here",
rb_id2str(old_def->original_id));
}
}
}
/* create method entry */
me = rb_method_entry_create(mid, defined_class, visi, NULL);
if (def == NULL) def = method_definition_create(type, original_id);
method_definition_set(me, def, opts);
rb_clear_method_cache_by_class(klass);
/* check mid */
if (klass == rb_cObject && mid == idInitialize) {
rb_warn("redefining Object#initialize may cause infinite loop");
}
/* check mid */
if (mid == object_id || mid == id__send__) {
if (type == VM_METHOD_TYPE_ISEQ && search_method(klass, mid, 0)) {
rb_warn("redefining `%s' may cause serious problems", rb_id2name(mid));
}
}
if (make_refined) {
make_method_entry_refined(klass, me);
}
rb_id_table_insert(mtbl, mid, (VALUE)me);
RB_OBJ_WRITTEN(klass, Qundef, (VALUE)me);
VM_ASSERT(me->def != NULL);
return me;
}
#define CALL_METHOD_HOOK(klass, hook, mid) do { \
const VALUE arg = ID2SYM(mid); \
VALUE recv_class = (klass); \
ID hook_id = (hook); \
if (FL_TEST((klass), FL_SINGLETON)) { \
recv_class = rb_ivar_get((klass), attached); \
hook_id = singleton_##hook; \
} \
rb_funcall2(recv_class, hook_id, 1, &arg); \
} while (0)
static void
method_added(VALUE klass, ID mid)
{
if (ruby_running) {
CALL_METHOD_HOOK(klass, added, mid);
}
}
rb_method_entry_t *
rb_add_method(VALUE klass, ID mid, rb_method_type_t type, void *opts, rb_method_visibility_t visi)
{
rb_method_entry_t *me = rb_method_entry_make(klass, mid, klass, visi, type, NULL, mid, opts);
if (type != VM_METHOD_TYPE_UNDEF && type != VM_METHOD_TYPE_REFINED) {
method_added(klass, mid);
}
return me;
}
void
rb_add_method_iseq(VALUE klass, ID mid, const rb_iseq_t *iseq, rb_cref_t *cref, rb_method_visibility_t visi)
{
struct { /* should be same fields with rb_method_iseq_struct */
const rb_iseq_t *iseqptr;
rb_cref_t *cref;
} iseq_body;
iseq_body.iseqptr = iseq;
iseq_body.cref = cref;
rb_add_method(klass, mid, VM_METHOD_TYPE_ISEQ, &iseq_body, visi);
}
static rb_method_entry_t *
method_entry_set(VALUE klass, ID mid, const rb_method_entry_t *me,
rb_method_visibility_t visi, VALUE defined_class)
{
rb_method_entry_t *newme = rb_method_entry_make(klass, mid, defined_class, visi,
me->def->type, method_definition_addref(me->def), 0, NULL);
METHOD_ENTRY_SAFE_SET(newme, METHOD_ENTRY_SAFE(me));
method_added(klass, mid);
return newme;
}
rb_method_entry_t *
rb_method_entry_set(VALUE klass, ID mid, const rb_method_entry_t *me, rb_method_visibility_t visi)
{
return method_entry_set(klass, mid, me, visi, klass);
}
#define UNDEF_ALLOC_FUNC ((rb_alloc_func_t)-1)
void
rb_define_alloc_func(VALUE klass, VALUE (*func)(VALUE))
{
Check_Type(klass, T_CLASS);
RCLASS_EXT(klass)->allocator = func;
}
void
rb_undef_alloc_func(VALUE klass)
{
rb_define_alloc_func(klass, UNDEF_ALLOC_FUNC);
}
rb_alloc_func_t
rb_get_alloc_func(VALUE klass)
{
Check_Type(klass, T_CLASS);
for (; klass; klass = RCLASS_SUPER(klass)) {
rb_alloc_func_t allocator = RCLASS_EXT(klass)->allocator;
if (allocator == UNDEF_ALLOC_FUNC) break;
if (allocator) return allocator;
}
return 0;
}
static inline rb_method_entry_t*
search_method(VALUE klass, ID id, VALUE *defined_class_ptr)
{
rb_method_entry_t *me;
for (me = 0; klass; klass = RCLASS_SUPER(klass)) {
if ((me = lookup_method_table(klass, id)) != 0) break;
}
if (defined_class_ptr)
*defined_class_ptr = klass;
return me;
}
const rb_method_entry_t *
rb_method_entry_at(VALUE klass, ID id)
{
return lookup_method_table(klass, id);
}
/*
* search method entry without the method cache.
*
* if you need method entry with method cache (normal case), use
* rb_method_entry() simply.
*/
static rb_method_entry_t *
method_entry_get_without_cache(VALUE klass, ID id,
VALUE *defined_class_ptr)
{
VALUE defined_class;
rb_method_entry_t *me = search_method(klass, id, &defined_class);
if (ruby_running) {
if (OPT_GLOBAL_METHOD_CACHE) {
struct cache_entry *ent;
ent = GLOBAL_METHOD_CACHE(klass, id);
ent->class_serial = RCLASS_SERIAL(klass);
ent->method_state = GET_GLOBAL_METHOD_STATE();
ent->defined_class = defined_class;
ent->mid = id;
if (UNDEFINED_METHOD_ENTRY_P(me)) {
ent->me = 0;
me = 0;
}
else {
ent->me = me;
}
}
else if (UNDEFINED_METHOD_ENTRY_P(me)) {
me = 0;
}
}
if (defined_class_ptr)
*defined_class_ptr = defined_class;
return me;
}
#if VM_DEBUG_VERIFY_METHOD_CACHE
static void
verify_method_cache(VALUE klass, ID id, VALUE defined_class, rb_method_entry_t *me)
{
VALUE actual_defined_class;
rb_method_entry_t *actual_me =
method_entry_get_without_cache(klass, id, &actual_defined_class);
if (me != actual_me || defined_class != actual_defined_class) {
rb_bug("method cache verification failed");
}
}
#endif
static rb_method_entry_t *
method_entry_get(VALUE klass, ID id, VALUE *defined_class_ptr)
{
#if OPT_GLOBAL_METHOD_CACHE
struct cache_entry *ent;
ent = GLOBAL_METHOD_CACHE(klass, id);
if (ent->method_state == GET_GLOBAL_METHOD_STATE() &&
ent->class_serial == RCLASS_SERIAL(klass) &&
ent->mid == id) {
#if VM_DEBUG_VERIFY_METHOD_CACHE
verify_method_cache(klass, id, ent->defined_class, ent->me);
#endif
if (defined_class_ptr) *defined_class_ptr = ent->defined_class;
return ent->me;
}
#endif
return method_entry_get_without_cache(klass, id, defined_class_ptr);
}
const rb_method_entry_t *
rb_method_entry(VALUE klass, ID id)
{
return method_entry_get(klass, id, NULL);
}
static const rb_callable_method_entry_t *
prepare_callable_method_entry(VALUE defined_class, ID id, const rb_method_entry_t *me)
{
struct rb_id_table *mtbl;
const rb_callable_method_entry_t *cme;
if (me && me->defined_class == 0) {
VM_ASSERT(RB_TYPE_P(defined_class, T_ICLASS));
VM_ASSERT(me->defined_class == 0);
if ((mtbl = RCLASS_EXT(defined_class)->callable_m_tbl) == NULL) {
mtbl = RCLASS_EXT(defined_class)->callable_m_tbl = rb_id_table_create(0);
}
if (rb_id_table_lookup(mtbl, id, (VALUE *)&me)) {
cme = (rb_callable_method_entry_t *)me;
VM_ASSERT(callable_method_entry_p(cme));
}
else {
cme = rb_method_entry_complement_defined_class(me, defined_class);
rb_id_table_insert(mtbl, id, (VALUE)cme);
VM_ASSERT(callable_method_entry_p(cme));
}
}
else {
cme = (const rb_callable_method_entry_t *)me;
}
VM_ASSERT(callable_method_entry_p(cme));
return cme;
}
const rb_callable_method_entry_t *
rb_callable_method_entry(VALUE klass, ID id)
{
VALUE defined_class;
rb_method_entry_t *me = method_entry_get(klass, id, &defined_class);
return prepare_callable_method_entry(defined_class, id, me);
}
static const rb_method_entry_t *resolve_refined_method(VALUE refinements, const rb_method_entry_t *me, VALUE *defined_class_ptr);
static const rb_method_entry_t *
method_entry_resolve_refinement(VALUE klass, ID id, int with_refinement, VALUE *defined_class_ptr)
{
const rb_method_entry_t *me = method_entry_get(klass, id, defined_class_ptr);
if (me) {
if (me->def->type == VM_METHOD_TYPE_REFINED) {
if (with_refinement) {
const rb_cref_t *cref = rb_vm_cref();
VALUE refinements = cref ? CREF_REFINEMENTS(cref) : Qnil;
me = resolve_refined_method(refinements, me, defined_class_ptr);
}
else {
me = resolve_refined_method(Qnil, me, defined_class_ptr);
}
if (UNDEFINED_METHOD_ENTRY_P(me)) me = NULL;
}
}
return me;
}
const rb_method_entry_t *
rb_method_entry_with_refinements(VALUE klass, ID id)
{
return method_entry_resolve_refinement(klass, id, TRUE, NULL);
}
const rb_callable_method_entry_t *
rb_callable_method_entry_with_refinements(VALUE klass, ID id)
{
VALUE defined_class;
const rb_method_entry_t *me = method_entry_resolve_refinement(klass, id, TRUE, &defined_class);
return prepare_callable_method_entry(defined_class, id, me);
}
const rb_method_entry_t *
rb_method_entry_without_refinements(VALUE klass, ID id)
{
return method_entry_resolve_refinement(klass, id, FALSE, NULL);
}
const rb_callable_method_entry_t *
rb_callable_method_entry_without_refinements(VALUE klass, ID id)
{
VALUE defined_class;
const rb_method_entry_t *me = method_entry_resolve_refinement(klass, id, FALSE, &defined_class);
return prepare_callable_method_entry(defined_class, id, me);
}
static const rb_method_entry_t *
refined_method_original_method_entry(VALUE refinements, const rb_method_entry_t *me, VALUE *defined_class_ptr)
{
VALUE super;
if (me->def->body.refined.orig_me) {
if (defined_class_ptr) *defined_class_ptr = me->def->body.refined.orig_me->defined_class;
return me->def->body.refined.orig_me;
}
else if (!(super = RCLASS_SUPER(me->owner))) {
return 0;
}
else {
rb_method_entry_t *tmp_me;
tmp_me = method_entry_get(super, me->called_id, defined_class_ptr);
return resolve_refined_method(refinements, tmp_me, defined_class_ptr);
}
}
static const rb_method_entry_t *
resolve_refined_method(VALUE refinements, const rb_method_entry_t *me, VALUE *defined_class_ptr)
{
if (me && me->def->type == VM_METHOD_TYPE_REFINED) {
VALUE refinement;
rb_method_entry_t *tmp_me;
refinement = find_refinement(refinements, me->owner);
if (NIL_P(refinement)) {
return refined_method_original_method_entry(refinements, me, defined_class_ptr);
}
else {
tmp_me = method_entry_get(refinement, me->called_id, defined_class_ptr);
if (tmp_me && tmp_me->def->type != VM_METHOD_TYPE_REFINED) {
return tmp_me;
}
else {
return refined_method_original_method_entry(refinements, me, defined_class_ptr);
}
}
}
else {
return me;
}
}
const rb_method_entry_t *
rb_resolve_refined_method(VALUE refinements, const rb_method_entry_t *me)
{
return resolve_refined_method(refinements, me, NULL);
}
const rb_callable_method_entry_t *
rb_resolve_refined_method_callable(VALUE refinements, const rb_callable_method_entry_t *me)
{
VALUE defined_class = me->defined_class;
const rb_method_entry_t *resolved_me = resolve_refined_method(refinements, (const rb_method_entry_t *)me, &defined_class);
if (resolved_me && resolved_me->defined_class == 0) {
return rb_method_entry_complement_defined_class(resolved_me, defined_class);
}
else {
return (const rb_callable_method_entry_t *)resolved_me;
}
}
static void
remove_method(VALUE klass, ID mid)
{
VALUE data;
rb_method_entry_t *me = 0;
VALUE self = klass;
klass = RCLASS_ORIGIN(klass);
rb_frozen_class_p(klass);
if (mid == object_id || mid == id__send__ || mid == idInitialize) {
rb_warn("removing `%s' may cause serious problems", rb_id2name(mid));
}
if (!rb_id_table_lookup(RCLASS_M_TBL(klass), mid, &data) ||
!(me = (rb_method_entry_t *)data) ||
(!me->def || me->def->type == VM_METHOD_TYPE_UNDEF) ||
UNDEFINED_REFINED_METHOD_P(me->def)) {
rb_name_error(mid, "method `%"PRIsVALUE"' not defined in %"PRIsVALUE,
rb_id2str(mid), rb_class_path(klass));
}
rb_id_table_delete(RCLASS_M_TBL(klass), mid);
rb_vm_check_redefinition_opt_method(me, klass);
rb_clear_method_cache_by_class(klass);
if (me->def->type == VM_METHOD_TYPE_REFINED) {
rb_add_refined_method_entry(klass, mid);
}
CALL_METHOD_HOOK(self, removed, mid);
}
void
rb_remove_method_id(VALUE klass, ID mid)
{
remove_method(klass, mid);
}
void
rb_remove_method(VALUE klass, const char *name)
{
remove_method(klass, rb_intern(name));
}
/*
* call-seq:
* remove_method(symbol) -> self
* remove_method(string) -> self
*
* Removes the method identified by _symbol_ from the current
* class. For an example, see <code>Module.undef_method</code>.
* String arguments are converted to symbols.
*/
static VALUE
rb_mod_remove_method(int argc, VALUE *argv, VALUE mod)
{
int i;
for (i = 0; i < argc; i++) {
VALUE v = argv[i];
ID id = rb_check_id(&v);
if (!id) {
rb_name_error_str(v, "method `%"PRIsVALUE"' not defined in %"PRIsVALUE,
v, rb_obj_class(mod));
}
remove_method(mod, id);
}
return mod;
}
static void
rb_export_method(VALUE klass, ID name, rb_method_visibility_t visi)
{
rb_method_entry_t *me;
VALUE defined_class;
me = search_method(klass, name, &defined_class);
if (!me && RB_TYPE_P(klass, T_MODULE)) {
me = search_method(rb_cObject, name, &defined_class);
}
if (UNDEFINED_METHOD_ENTRY_P(me) ||
UNDEFINED_REFINED_METHOD_P(me->def)) {
rb_print_undef(klass, name, 0);
}
if (METHOD_ENTRY_VISI(me) != visi) {
rb_vm_check_redefinition_opt_method(me, klass);
if (klass == defined_class || RCLASS_ORIGIN(klass) == defined_class) {
METHOD_ENTRY_VISI_SET(me, visi);
if (me->def->type == VM_METHOD_TYPE_REFINED && me->def->body.refined.orig_me) {
METHOD_ENTRY_VISI_SET((rb_method_entry_t *)me->def->body.refined.orig_me, visi);