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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"
#include "yjit.h"
#include "rjit.h"
#define METHOD_DEBUG 0
static int vm_redefinition_check_flag(VALUE klass);
static void rb_vm_check_redefinition_opt_method(const rb_method_entry_t *me, VALUE klass);
static inline rb_method_entry_t *lookup_method_table(VALUE klass, ID id);
#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 ruby_running (GET_VM()->running)
/* int ruby_running = 0; */
static enum rb_id_table_iterator_result
vm_ccs_dump_i(ID mid, VALUE val, void *data)
{
const struct rb_class_cc_entries *ccs = (struct rb_class_cc_entries *)val;
fprintf(stderr, " | %s (len:%d) ", rb_id2name(mid), ccs->len);
rp(ccs->cme);
for (int i=0; i<ccs->len; i++) {
fprintf(stderr, " | [%d]\t", i); vm_ci_dump(ccs->entries[i].ci);
rp_m( " | \t", ccs->entries[i].cc);
}
return ID_TABLE_CONTINUE;
}
static void
vm_ccs_dump(VALUE klass, ID target_mid)
{
struct rb_id_table *cc_tbl = RCLASS_CC_TBL(klass);
if (cc_tbl) {
VALUE ccs;
if (target_mid) {
if (rb_id_table_lookup(cc_tbl, target_mid, &ccs)) {
fprintf(stderr, " [CCTB] %p\n", (void *)cc_tbl);
vm_ccs_dump_i(target_mid, ccs, NULL);
}
}
else {
fprintf(stderr, " [CCTB] %p\n", (void *)cc_tbl);
rb_id_table_foreach(cc_tbl, vm_ccs_dump_i, (void *)target_mid);
}
}
}
static enum rb_id_table_iterator_result
vm_cme_dump_i(ID mid, VALUE val, void *data)
{
ID target_mid = (ID)data;
if (target_mid == 0 || mid == target_mid) {
rp_m(" > ", val);
}
return ID_TABLE_CONTINUE;
}
static VALUE
vm_mtbl_dump(VALUE klass, ID target_mid)
{
fprintf(stderr, "# vm_mtbl\n");
while (klass) {
rp_m(" -> ", klass);
VALUE me;
if (RCLASS_M_TBL(klass)) {
if (target_mid != 0) {
if (rb_id_table_lookup(RCLASS_M_TBL(klass), target_mid, &me)) {
rp_m(" [MTBL] ", me);
}
}
else {
fprintf(stderr, " ## RCLASS_M_TBL (%p)\n", (void *)RCLASS_M_TBL(klass));
rb_id_table_foreach(RCLASS_M_TBL(klass), vm_cme_dump_i, NULL);
}
}
else {
fprintf(stderr, " MTBL: NULL\n");
}
if (RCLASS_CALLABLE_M_TBL(klass)) {
if (target_mid != 0) {
if (rb_id_table_lookup(RCLASS_CALLABLE_M_TBL(klass), target_mid, &me)) {
rp_m(" [CM**] ", me);
}
}
else {
fprintf(stderr, " ## RCLASS_CALLABLE_M_TBL\n");
rb_id_table_foreach(RCLASS_CALLABLE_M_TBL(klass), vm_cme_dump_i, NULL);
}
}
if (RCLASS_CC_TBL(klass)) {
vm_ccs_dump(klass, target_mid);
}
klass = RCLASS_SUPER(klass);
}
return Qnil;
}
void
rb_vm_mtbl_dump(const char *msg, VALUE klass, ID target_mid)
{
fprintf(stderr, "[%s] ", msg);
vm_mtbl_dump(klass, target_mid);
}
static inline void
vm_cme_invalidate(rb_callable_method_entry_t *cme)
{
VM_ASSERT(IMEMO_TYPE_P(cme, imemo_ment));
VM_ASSERT(callable_method_entry_p(cme));
METHOD_ENTRY_INVALIDATED_SET(cme);
RB_DEBUG_COUNTER_INC(cc_cme_invalidate);
rb_yjit_cme_invalidate(cme);
rb_rjit_cme_invalidate(cme);
}
static int
rb_clear_constant_cache_for_id_i(st_data_t ic, st_data_t idx, st_data_t arg)
{
((IC) ic)->entry = NULL;
return ST_CONTINUE;
}
// Here for backward compat.
void rb_clear_constant_cache(void) {}
void
rb_clear_constant_cache_for_id(ID id)
{
VALUE lookup_result;
rb_vm_t *vm = GET_VM();
if (rb_id_table_lookup(vm->constant_cache, id, &lookup_result)) {
st_table *ics = (st_table *)lookup_result;
st_foreach(ics, rb_clear_constant_cache_for_id_i, (st_data_t) NULL);
ruby_vm_constant_cache_invalidations += ics->num_entries;
}
rb_yjit_constant_state_changed(id);
rb_rjit_constant_state_changed(id);
}
static void
invalidate_negative_cache(ID mid)
{
VALUE cme;
rb_vm_t *vm = GET_VM();
if (rb_id_table_lookup(vm->negative_cme_table, mid, &cme)) {
rb_id_table_delete(vm->negative_cme_table, mid);
vm_cme_invalidate((rb_callable_method_entry_t *)cme);
RB_DEBUG_COUNTER_INC(cc_invalidate_negative);
}
}
static rb_method_entry_t *rb_method_entry_alloc(ID called_id, VALUE owner, VALUE defined_class, const rb_method_definition_t *def);
const rb_method_entry_t * rb_method_entry_clone(const rb_method_entry_t *src_me);
static const rb_callable_method_entry_t *complemented_callable_method_entry(VALUE klass, ID id);
static const rb_callable_method_entry_t *lookup_overloaded_cme(const rb_callable_method_entry_t *cme);
static void
clear_method_cache_by_id_in_class(VALUE klass, ID mid)
{
VM_ASSERT(RB_TYPE_P(klass, T_CLASS) || RB_TYPE_P(klass, T_ICLASS));
if (rb_objspace_garbage_object_p(klass)) return;
RB_VM_LOCK_ENTER();
if (LIKELY(RCLASS_SUBCLASSES(klass) == NULL)) {
// no subclasses
// check only current class
struct rb_id_table *cc_tbl = RCLASS_CC_TBL(klass);
VALUE ccs_data;
// invalidate CCs
if (cc_tbl && rb_id_table_lookup(cc_tbl, mid, &ccs_data)) {
struct rb_class_cc_entries *ccs = (struct rb_class_cc_entries *)ccs_data;
rb_yjit_cme_invalidate((rb_callable_method_entry_t *)ccs->cme);
rb_rjit_cme_invalidate((rb_callable_method_entry_t *)ccs->cme);
if (NIL_P(ccs->cme->owner)) invalidate_negative_cache(mid);
rb_vm_ccs_free(ccs);
rb_id_table_delete(cc_tbl, mid);
RB_DEBUG_COUNTER_INC(cc_invalidate_leaf_ccs);
}
// remove from callable_m_tbl, if exists
struct rb_id_table *cm_tbl;
if ((cm_tbl = RCLASS_CALLABLE_M_TBL(klass)) != NULL) {
VALUE cme;
if (rb_yjit_enabled_p() && rb_id_table_lookup(cm_tbl, mid, &cme)) {
rb_yjit_cme_invalidate((rb_callable_method_entry_t *)cme);
}
if (rb_rjit_enabled && rb_id_table_lookup(cm_tbl, mid, &cme)) {
rb_rjit_cme_invalidate((rb_callable_method_entry_t *)cme);
}
rb_id_table_delete(cm_tbl, mid);
RB_DEBUG_COUNTER_INC(cc_invalidate_leaf_callable);
}
RB_DEBUG_COUNTER_INC(cc_invalidate_leaf);
}
else {
const rb_callable_method_entry_t *cme = complemented_callable_method_entry(klass, mid);
if (cme) {
// invalidate cme if found to invalidate the inline method cache.
if (METHOD_ENTRY_CACHED(cme)) {
if (METHOD_ENTRY_COMPLEMENTED(cme)) {
// do nothing
}
else {
// invalidate cc by invalidating cc->cme
VALUE owner = cme->owner;
VM_ASSERT(BUILTIN_TYPE(owner) == T_CLASS);
VALUE klass_housing_cme;
if (cme->def->type == VM_METHOD_TYPE_REFINED && !cme->def->body.refined.orig_me) {
klass_housing_cme = owner;
}
else {
klass_housing_cme = RCLASS_ORIGIN(owner);
}
// replace the cme that will be invalid
VM_ASSERT(lookup_method_table(klass_housing_cme, mid) == (const rb_method_entry_t *)cme);
const rb_method_entry_t *new_cme = rb_method_entry_clone((const rb_method_entry_t *)cme);
rb_method_table_insert(klass_housing_cme, RCLASS_M_TBL(klass_housing_cme), mid, new_cme);
}
vm_cme_invalidate((rb_callable_method_entry_t *)cme);
RB_DEBUG_COUNTER_INC(cc_invalidate_tree_cme);
if (cme->def->iseq_overload) {
rb_callable_method_entry_t *monly_cme = (rb_callable_method_entry_t *)lookup_overloaded_cme(cme);
if (monly_cme) {
vm_cme_invalidate(monly_cme);
}
}
}
// invalidate complement tbl
if (METHOD_ENTRY_COMPLEMENTED(cme)) {
VALUE defined_class = cme->defined_class;
struct rb_id_table *cm_tbl = RCLASS_CALLABLE_M_TBL(defined_class);
VM_ASSERT(cm_tbl != NULL);
int r = rb_id_table_delete(cm_tbl, mid);
VM_ASSERT(r == TRUE); (void)r;
RB_DEBUG_COUNTER_INC(cc_invalidate_tree_callable);
}
RB_DEBUG_COUNTER_INC(cc_invalidate_tree);
}
else {
invalidate_negative_cache(mid);
}
}
RB_VM_LOCK_LEAVE();
}
static void
clear_iclass_method_cache_by_id(VALUE iclass, VALUE d)
{
VM_ASSERT(RB_TYPE_P(iclass, T_ICLASS));
ID mid = (ID)d;
clear_method_cache_by_id_in_class(iclass, mid);
}
static void
clear_iclass_method_cache_by_id_for_refinements(VALUE klass, VALUE d)
{
if (RB_TYPE_P(klass, T_ICLASS)) {
ID mid = (ID)d;
clear_method_cache_by_id_in_class(klass, mid);
}
}
void
rb_clear_method_cache(VALUE klass_or_module, ID mid)
{
if (RB_TYPE_P(klass_or_module, T_MODULE)) {
VALUE module = klass_or_module; // alias
if (FL_TEST(module, RMODULE_IS_REFINEMENT)) {
VALUE refined_class = rb_refinement_module_get_refined_class(module);
rb_clear_method_cache(refined_class, mid);
rb_class_foreach_subclass(refined_class, clear_iclass_method_cache_by_id_for_refinements, mid);
}
rb_class_foreach_subclass(module, clear_iclass_method_cache_by_id, mid);
}
else {
clear_method_cache_by_id_in_class(klass_or_module, mid);
}
}
// gc.c
void rb_cc_table_free(VALUE klass);
static int
invalidate_all_refinement_cc(void *vstart, void *vend, size_t stride, void *data)
{
VALUE v = (VALUE)vstart;
for (; v != (VALUE)vend; v += stride) {
void *ptr = asan_poisoned_object_p(v);
asan_unpoison_object(v, false);
if (RBASIC(v)->flags) { // liveness check
if (imemo_type_p(v, imemo_callcache)) {
const struct rb_callcache *cc = (const struct rb_callcache *)v;
if (vm_cc_refinement_p(cc) && cc->klass) {
vm_cc_invalidate(cc);
}
}
}
if (ptr) {
asan_poison_object(v);
}
}
return 0; // continue to iteration
}
void
rb_clear_all_refinement_method_cache(void)
{
rb_objspace_each_objects(invalidate_all_refinement_cc, NULL);
rb_yjit_invalidate_all_method_lookup_assumptions();
}
void
rb_method_table_insert(VALUE klass, struct rb_id_table *table, ID method_id, const rb_method_entry_t *me)
{
VALUE table_owner = klass;
if (RB_TYPE_P(klass, T_ICLASS) && !RICLASS_OWNS_M_TBL_P(klass)) {
table_owner = RBASIC(table_owner)->klass;
}
VM_ASSERT(RB_TYPE_P(table_owner, T_CLASS) || RB_TYPE_P(table_owner, T_ICLASS) || RB_TYPE_P(table_owner, T_MODULE));
VM_ASSERT(table == RCLASS_M_TBL(table_owner));
rb_id_table_insert(table, method_id, (VALUE)me);
RB_OBJ_WRITTEN(table_owner, Qundef, (VALUE)me);
}
// rb_f_notimplement has an extra trailing argument to distinguish it from other methods
// at compile-time to override arity to be -1. But the trailing argument introduces a
// signature mismatch between caller and callee, so rb_define_method family inserts a
// method entry with rb_f_notimplement_internal, which has canonical arity=-1 signature,
// instead of rb_f_notimplement.
NORETURN(static VALUE rb_f_notimplement_internal(int argc, const VALUE *argv, VALUE obj));
static VALUE
rb_f_notimplement_internal(int argc, const VALUE *argv, VALUE obj)
{
rb_notimplement();
UNREACHABLE_RETURN(Qnil);
}
VALUE
rb_f_notimplement(int argc, const VALUE *argv, VALUE obj, VALUE marker)
{
rb_f_notimplement_internal(argc, argv, obj);
}
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 != (VALUE(*)(ANYARGS))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);
}
}
void
rb_add_method_optimized(VALUE klass, ID mid, enum method_optimized_type opt_type, unsigned int index, rb_method_visibility_t visi)
{
rb_method_optimized_t opt = {
.type = opt_type,
.index = index,
};
rb_add_method(klass, mid, VM_METHOD_TYPE_OPTIMIZED, &opt, visi);
}
static void
rb_method_definition_release(rb_method_definition_t *def, int complemented)
{
if (def != NULL) {
const int alias_count = def->alias_count;
const int complemented_count = def->complemented_count;
VM_ASSERT(alias_count >= 0);
VM_ASSERT(complemented_count >= 0);
if (alias_count + complemented_count == 0) {
if (METHOD_DEBUG) fprintf(stderr, "-%p-%s:%d,%d (remove)\n", (void *)def,
rb_id2name(def->original_id), alias_count, complemented_count);
if (def->type == VM_METHOD_TYPE_BMETHOD && def->body.bmethod.hooks) {
xfree(def->body.bmethod.hooks);
}
xfree(def);
}
else {
if (complemented) {
VM_ASSERT(def->complemented_count > 0);
def->complemented_count--;
}
else if (def->alias_count > 0) {
def->alias_count--;
}
if (METHOD_DEBUG) fprintf(stderr, "-%p-%s:%d->%d,%d->%d (dec)\n", (void *)def, rb_id2name(def->original_id),
alias_count, def->alias_count, complemented_count, def->complemented_count);
}
}
}
static void delete_overloaded_cme(const rb_callable_method_entry_t *cme);
void
rb_free_method_entry(const rb_method_entry_t *me)
{
if (me->def && me->def->iseq_overload) {
delete_overloaded_cme((const rb_callable_method_entry_t *)me);
}
rb_method_definition_release(me->def, METHOD_ENTRY_COMPLEMENTED(me));
}
static inline rb_method_entry_t *search_method(VALUE klass, ID id, VALUE *defined_class_ptr);
extern int rb_method_definition_eq(const rb_method_definition_t *d1, const rb_method_definition_t *d2);
static VALUE
(*call_cfunc_invoker_func(int argc))(VALUE recv, int argc, const VALUE *, VALUE (*func)(ANYARGS))
{
if (!GET_THREAD()->ext_config.ractor_safe) {
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("unsupported length: %d", argc);
}
}
else {
switch (argc) {
case -2: return &ractor_safe_call_cfunc_m2;
case -1: return &ractor_safe_call_cfunc_m1;
case 0: return &ractor_safe_call_cfunc_0;
case 1: return &ractor_safe_call_cfunc_1;
case 2: return &ractor_safe_call_cfunc_2;
case 3: return &ractor_safe_call_cfunc_3;
case 4: return &ractor_safe_call_cfunc_4;
case 5: return &ractor_safe_call_cfunc_5;
case 6: return &ractor_safe_call_cfunc_6;
case 7: return &ractor_safe_call_cfunc_7;
case 8: return &ractor_safe_call_cfunc_8;
case 9: return &ractor_safe_call_cfunc_9;
case 10: return &ractor_safe_call_cfunc_10;
case 11: return &ractor_safe_call_cfunc_11;
case 12: return &ractor_safe_call_cfunc_12;
case 13: return &ractor_safe_call_cfunc_13;
case 14: return &ractor_safe_call_cfunc_14;
case 15: return &ractor_safe_call_cfunc_15;
default:
rb_bug("unsupported length: %d", argc);
}
}
}
static void
setup_method_cfunc_struct(rb_method_cfunc_t *cfunc, VALUE (*func)(ANYARGS), int argc)
{
cfunc->func = func;
cfunc->argc = argc;
cfunc->invoker = call_cfunc_invoker_func(argc);
}
void
rb_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;
const rb_iseq_t *iseq = iseq_body->iseqptr;
rb_cref_t *method_cref, *cref = iseq_body->cref;
/* setup iseq first (before invoking GC) */
RB_OBJ_WRITE(me, &def->body.iseq.iseqptr, iseq);
if (ISEQ_BODY(iseq)->mandatory_only_iseq) def->iseq_overload = 1;
if (0) vm_cref_dump("rb_method_definition_create", cref);
if (cref) {
method_cref = cref;
}
else {
method_cref = vm_cref_new_toplevel(GET_EC()); /* 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(UNALIGNED_MEMBER_PTR(def, body.cfunc), cfunc->func, cfunc->argc);
return;
}
case VM_METHOD_TYPE_ATTRSET:
case VM_METHOD_TYPE_IVAR:
{
const rb_execution_context_t *ec = GET_EC();
rb_control_frame_t *cfp;
int line;
def->body.attr.id = (ID)(VALUE)opts;
cfp = rb_vm_get_ruby_level_next_cfp(ec, ec->cfp);
if (cfp && (line = rb_vm_get_sourceline(cfp))) {
VALUE location = rb_ary_new3(2, rb_iseq_path(cfp->iseq), 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.bmethod.proc, (VALUE)opts);
RB_OBJ_WRITE(me, &def->body.bmethod.defined_ractor, rb_ractor_self(GET_RACTOR()));
return;
case VM_METHOD_TYPE_NOTIMPLEMENTED:
setup_method_cfunc_struct(UNALIGNED_MEMBER_PTR(def, body.cfunc), (VALUE(*)(ANYARGS))rb_f_notimplement_internal, -1);
return;
case VM_METHOD_TYPE_OPTIMIZED:
def->body.optimized = *(rb_method_optimized_t *)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.bmethod.proc);
RB_OBJ_WRITTEN(me, Qundef, def->body.bmethod.defined_ractor);
/* give up to check all in a list */
if (def->body.bmethod.hooks) rb_gc_writebarrier_remember((VALUE)me);
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;
}
}
rb_method_definition_t *
rb_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;
static uintptr_t method_serial = 1;
def->method_serial = method_serial++;
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", (void *)def, rb_id2name(def->original_id), def->alias_count);
return def;
}
static rb_method_definition_t *
method_definition_addref_complement(rb_method_definition_t *def)
{
def->complemented_count++;
if (METHOD_DEBUG) fprintf(stderr, "+%p-%s:%d\n", (void *)def, rb_id2name(def->original_id), def->complemented_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;
default:
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);
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, src_me->def);
if (METHOD_ENTRY_COMPLEMENTED(src_me)) {
method_definition_addref_complement(src_me->def);
}
else {
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, ID called_id, VALUE defined_class)
{
rb_method_definition_t *def = src_me->def;
rb_method_entry_t *me;
struct {
const struct rb_method_entry_struct *orig_me;
VALUE owner;
} refined = {0};
if (!src_me->defined_class &&
def->type == VM_METHOD_TYPE_REFINED &&
def->body.refined.orig_me) {
const rb_method_entry_t *orig_me =
rb_method_entry_clone(def->body.refined.orig_me);
RB_OBJ_WRITE((VALUE)orig_me, &orig_me->defined_class, defined_class);
refined.orig_me = orig_me;
refined.owner = orig_me->owner;
def = NULL;
}
else {
method_definition_addref_complement(def);
}
me = rb_method_entry_alloc(called_id, src_me->owner, defined_class, def);
METHOD_ENTRY_FLAGS_COPY(me, src_me);
METHOD_ENTRY_COMPLEMENTED_SET(me);
if (!def) {
def = rb_method_definition_create(VM_METHOD_TYPE_REFINED, called_id);
rb_method_definition_set(me, def, &refined);
}
VM_ASSERT(RB_TYPE_P(me->owner, T_MODULE));
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 {
struct rb_method_entry_struct *orig_me;
VALUE owner;
} refined;
rb_method_definition_t *def;
rb_vm_check_redefinition_opt_method(me, me->owner);
refined.orig_me =
rb_method_entry_alloc(me->called_id, me->owner,
me->defined_class ?
me->defined_class : owner,
method_definition_addref(me->def));
METHOD_ENTRY_FLAGS_COPY(refined.orig_me, me);
refined.owner = owner;
def = rb_method_definition_create(VM_METHOD_TYPE_REFINED, me->called_id);
rb_method_definition_set(me, def, (void *)&refined);
METHOD_ENTRY_VISI_SET(me, METHOD_VISI_PUBLIC);
}
}
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;
}
}
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(refined_class, mid);
}
else {
rb_add_method(refined_class, mid, VM_METHOD_TYPE_REFINED, 0, METHOD_VISI_PUBLIC);
}
}
static void
check_override_opt_method_i(VALUE klass, VALUE arg)
{
ID mid = (ID)arg;
const rb_method_entry_t *me, *newme;
if (vm_redefinition_check_flag(klass)) {
me = lookup_method_table(RCLASS_ORIGIN(klass), mid);
if (me) {
newme = rb_method_entry(klass, mid);
if (newme != me) rb_vm_check_redefinition_opt_method(me, me->owner);
}
}
rb_class_foreach_subclass(klass, check_override_opt_method_i, (VALUE)mid);
}
static void
check_override_opt_method(VALUE klass, VALUE mid)
{
if (rb_vm_check_optimizable_mid(mid)) {
check_override_opt_method_i(klass, mid);
}
}
/*
* 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;
VALUE orig_klass;
if (NIL_P(klass)) {
klass = rb_cObject;
}
orig_klass = klass;
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;
}
}
if (type != VM_METHOD_TYPE_REFINED) {
rb_class_modify_check(klass);
}
if (RB_TYPE_P(klass, T_MODULE) && 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);
if (klass != orig_klass) {
rb_clear_method_cache(orig_klass, mid);
}
}
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->no_redef_warning) &&
!make_refined &&
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.bmethod.proc, 0);
break;
default:
break;
}
if (iseq) {
rb_compile_warning(RSTRING_PTR(rb_iseq_path(iseq)),
ISEQ_BODY(iseq)->location.first_lineno,
"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 = rb_method_definition_create(type, original_id);
rb_method_definition_set(me, def, opts);
rb_clear_method_cache(klass, mid);
/* check mid */
if (klass == rb_cObject) {
switch (mid) {
case idInitialize:
case idRespond_to_missing:
case idMethodMissing:
case idRespond_to:
rb_warn("redefining Object#%s may cause infinite loop", rb_id2name(mid));
}
}
/* 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_method_table_insert(klass, mtbl, mid, me);
VM_ASSERT(me->def != NULL);
/* check optimized method override by a prepended module */
if (RB_TYPE_P(orig_klass, T_MODULE)) {
check_override_opt_method(klass, (VALUE)mid);
}
return me;
}
static rb_method_entry_t *rb_method_entry_alloc(ID called_id, VALUE owner, VALUE defined_class, const rb_method_definition_t *def);
static st_table *
overloaded_cme_table(void)
{
VM_ASSERT(GET_VM()->overloaded_cme_table != NULL);
return GET_VM()->overloaded_cme_table;
}
#if VM_CHECK_MODE > 0
static int
vm_dump_overloaded_cme_table(st_data_t key, st_data_t val, st_data_t dmy)
{
fprintf(stderr, "key: "); rp(key);
fprintf(stderr, "val: "); rp(val);
return ST_CONTINUE;
}
void
rb_vm_dump_overloaded_cme_table(void)
{
fprintf(stderr, "== rb_vm_dump_overloaded_cme_table\n");
st_foreach(overloaded_cme_table(), vm_dump_overloaded_cme_table, 0);
}
#endif
static int
lookup_overloaded_cme_i(st_data_t *key, st_data_t *value, st_data_t data, int existing)
{
if (existing) {
const rb_callable_method_entry_t *cme = (const rb_callable_method_entry_t *)*key;