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ruby/vm_method.c

2111 строки
56 KiB
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 int vm_redefinition_check_flag(VALUE klass);
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();
if (RB_TYPE_P(klass, T_ICLASS)) {
struct rb_id_table *table = RCLASS_CALLABLE_M_TBL(klass);
if (table) {
rb_id_table_clear(table);
}
}
else {
if (RCLASS_CALLABLE_M_TBL(klass) != 0) {
rb_obj_info_dump(klass);
rb_bug("RCLASS_CALLABLE_M_TBL(klass) != 0");
}
}
rb_class_foreach_subclass(klass, rb_class_clear_method_cache, arg);
}
void
rb_clear_cache(void)
{
ONLY_FOR_INTERNAL_USE("rb_clear_cache()");
}
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;
RUBY_DTRACE_HOOK(METHOD_CACHE_CLEAR, (global ? "global" : rb_class2name(klass)));
if (global) {
INC_GLOBAL_METHOD_STATE();
}
else {
rb_class_clear_method_cache(klass, Qnil);
}
}
if (klass == rb_mKernel) {
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, 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", def, rb_id2name(def->original_id), alias_count, complemented_count);
xfree(def);
}
else {
if (complemented) 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", def, rb_id2name(def->original_id),
alias_count, def->alias_count, complemented_count, def->complemented_count);
}
}
}
void
rb_free_method_entry(const rb_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);
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_definition_t *
method_definition_addref_complement(rb_method_definition_t *def)
{
def->complemented_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);
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, ID called_id, VALUE defined_class)
{
rb_method_entry_t *me = rb_method_entry_alloc(called_id, src_me->owner, defined_class,
method_definition_addref_complement(src_me->def));
METHOD_ENTRY_FLAGS_COPY(me, src_me);
METHOD_ENTRY_COMPLEMENTED_SET(me);
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_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;
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);
}
}
static void
check_override_opt_method(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, (VALUE)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;
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);
/* check optimized method override by a prepended module */
if (RB_TYPE_P(klass, T_MODULE)) {
check_override_opt_method(klass, (VALUE)mid);
}
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_funcallv(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_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)) {
me = ent->me = NULL;
}
else {
ent->me = me;
}
}
else if (UNDEFINED_METHOD_ENTRY_P(me)) {
me = NULL;
}
}
else if (UNDEFINED_METHOD_ENTRY_P(me)) {
me = NULL;
}
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) || RB_TYPE_P(defined_class, T_MODULE));
VM_ASSERT(me->defined_class == 0);
if ((mtbl = RCLASS_CALLABLE_M_TBL(defined_class)) == 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, me->called_id, 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, me->called_id, 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_err_raise("method `%1$s' not defined in %2$s",
klass, ID2SYM(mid));
}
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_err_raise("method `%1$s' not defined in %2$s",
mod, v);
}
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, METHOD_VISI_UNDEF);
}
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);
}
rb_clear_method_cache_by_class(klass);
}
else {
rb_add_method(klass, name, VM_METHOD_TYPE_ZSUPER, 0, visi);
}
}
}
#define BOUND_PRIVATE 0x01
#define BOUND_RESPONDS 0x02
int
rb_method_boundp(VALUE klass, ID id, int ex)
{
const rb_method_entry_t *me = rb_method_entry_without_refinements(klass, id);
if (me != 0) {
if ((ex & ~BOUND_RESPONDS) &&
((METHOD_ENTRY_VISI(me) == METHOD_VISI_PRIVATE) ||
((ex & BOUND_RESPONDS) && (METHOD_ENTRY_VISI(me) == METHOD_VISI_PROTECTED)))) {
return 0;
}
if (me->def->type == VM_METHOD_TYPE_NOTIMPLEMENTED) {
if (ex & BOUND_RESPONDS) return 2;
return 0;
}
return 1;
}
return 0;
}
static rb_method_visibility_t
rb_scope_visibility_get(void)
{
rb_thread_t *th = GET_THREAD();
rb_control_frame_t *cfp = rb_vm_get_ruby_level_next_cfp(th, th->cfp);
if (!vm_env_cref_by_cref(cfp->ep)) {
return METHOD_VISI_PUBLIC;
}
else {
return CREF_SCOPE_VISI(rb_vm_cref())->method_visi;
}
}
static int
rb_scope_module_func_check(void)
{
rb_thread_t *th = GET_THREAD();
rb_control_frame_t *cfp = rb_vm_get_ruby_level_next_cfp(th, th->cfp);
if (!vm_env_cref_by_cref(cfp->ep)) {
return FALSE;
}
else {
return CREF_SCOPE_VISI(rb_vm_cref())->module_func;
}
}
static void
vm_cref_set_visibility(rb_method_visibility_t method_visi, int module_func)
{
rb_scope_visibility_t *scope_visi = (rb_scope_visibility_t *)&rb_vm_cref()->scope_visi;
scope_visi->method_visi = method_visi;
scope_visi->module_func = module_func;
}
void
rb_scope_visibility_set(rb_method_visibility_t visi)
{
vm_cref_set_visibility(visi, FALSE);
}
static void
rb_scope_module_func_set(void)
{
vm_cref_set_visibility(METHOD_VISI_PRIVATE, TRUE);
}
void
rb_attr(VALUE klass, ID id, int read, int write, int ex)
{
ID attriv;
rb_method_visibility_t visi;
if (!ex) {
visi = METHOD_VISI_PUBLIC;
}
else {
switch (rb_scope_visibility_get()) {
case METHOD_VISI_PRIVATE:
if (rb_scope_module_func_check()) {
rb_warning("attribute accessor as module_function");
}
visi = METHOD_VISI_PRIVATE;
break;
case METHOD_VISI_PROTECTED:
visi = METHOD_VISI_PROTECTED;
break;
default:
visi = METHOD_VISI_PUBLIC;
break;
}
}
attriv = rb_intern_str(rb_sprintf("@%"PRIsVALUE, rb_id2str(id)));
if (read) {
rb_add_method(klass, id, VM_METHOD_TYPE_IVAR, (void *)attriv, visi);
}
if (write) {
rb_add_method(klass, rb_id_attrset(id), VM_METHOD_TYPE_ATTRSET, (void *)attriv, visi);
}
}
void
rb_undef(VALUE klass, ID id)
{
rb_method_entry_t *me;
if (NIL_P(klass)) {
rb_raise(rb_eTypeError, "no class to undef method");
}
rb_frozen_class_p(klass);
if (id == object_id || id == id__send__ || id == idInitialize) {
rb_warn("undefining `%s' may cause serious problems", rb_id2name(id));
}
me = search_method(klass, id, 0);
if (UNDEFINED_METHOD_ENTRY_P(me) ||
UNDEFINED_REFINED_METHOD_P(me->def)) {
rb_method_name_error(klass, rb_id2str(id));
}
rb_add_method(klass, id, VM_METHOD_TYPE_UNDEF, 0, METHOD_VISI_PUBLIC);
CALL_METHOD_HOOK(klass, undefined, id);
}
/*
* call-seq:
* undef_method(symbol) -> self
* undef_method(string) -> self
*
* Prevents the current class from responding to calls to the named
* method. Contrast this with <code>remove_method</code>, which deletes
* the method from the particular class; Ruby will still search
* superclasses and mixed-in modules for a possible receiver.
* String arguments are converted to symbols.
*
* class Parent
* def hello
* puts "In parent"
* end
* end
* class Child < Parent
* def hello
* puts "In child"
* end
* end
*
*
* c = Child.new
* c.hello
*
*
* class Child
* remove_method :hello # remove from child, still in parent
* end
* c.hello
*
*
* class Child
* undef_method :hello # prevent any calls to 'hello'
* end
* c.hello
*
* <em>produces:</em>
*
* In child
* In parent
* prog.rb:23: undefined method `hello' for #<Child:0x401b3bb4> (NoMethodError)
*/
static VALUE
rb_mod_undef_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_method_name_error(mod, v);
}
rb_undef(mod, id);
}
return mod;
}
/*
* call-seq:
* mod.method_defined?(symbol) -> true or false
* mod.method_defined?(string) -> true or false
*
* Returns +true+ if the named method is defined by
* _mod_ (or its included modules and, if _mod_ is a class,
* its ancestors). Public and protected methods are matched.
* String arguments are converted to symbols.
*
* module A
* def method1() end
* def protected_method1() end
* protected :protected_method1
* end
* class B
* def method2() end
* def private_method2() end
* private :private_method2
* end
* class C < B
* include A
* def method3() end
* end
*
* A.method_defined? :method1 #=> true
* C.method_defined? "method1" #=> true
* C.method_defined? "method2" #=> true
* C.method_defined? "method3" #=> true
* C.method_defined? "protected_method1" #=> true
* C.method_defined? "method4" #=> false
* C.method_defined? "private_method2" #=> false
*/
static VALUE
rb_mod_method_defined(VALUE mod, VALUE mid)
{
ID id = rb_check_id(&mid);
if (!id || !rb_method_boundp(mod, id, 1)) {
return Qfalse;
}
return Qtrue;
}
static VALUE
check_definition(VALUE mod, VALUE mid, rb_method_visibility_t visi)
{
const rb_method_entry_t *me;
ID id = rb_check_id(&mid);
if (!id) return Qfalse;
me = rb_method_entry_without_refinements(mod, id);
if (me) {
if (METHOD_ENTRY_VISI(me) == visi) return Qtrue;
}
return Qfalse;
}
/*
* call-seq:
* mod.public_method_defined?(symbol) -> true or false
* mod.public_method_defined?(string) -> true or false
*
* Returns +true+ if the named public method is defined by
* _mod_ (or its included modules and, if _mod_ is a class,
* its ancestors).
* String arguments are converted to symbols.
*
* module A
* def method1() end
* end
* class B
* protected
* def method2() end
* end
* class C < B
* include A
* def method3() end
* end
*
* A.method_defined? :method1 #=> true
* C.public_method_defined? "method1" #=> true
* C.public_method_defined? "method2" #=> false
* C.method_defined? "method2" #=> true
*/
static VALUE
rb_mod_public_method_defined(VALUE mod, VALUE mid)
{
return check_definition(mod, mid, METHOD_VISI_PUBLIC);
}
/*
* call-seq:
* mod.private_method_defined?(symbol) -> true or false
* mod.private_method_defined?(string) -> true or false
*
* Returns +true+ if the named private method is defined by
* _ mod_ (or its included modules and, if _mod_ is a class,
* its ancestors).
* String arguments are converted to symbols.
*
* module A
* def method1() end
* end
* class B
* private
* def method2() end
* end
* class C < B
* include A
* def method3() end
* end
*
* A.method_defined? :method1 #=> true
* C.private_method_defined? "method1" #=> false
* C.private_method_defined? "method2" #=> true
* C.method_defined? "method2" #=> false
*/
static VALUE
rb_mod_private_method_defined(VALUE mod, VALUE mid)
{
return check_definition(mod, mid, METHOD_VISI_PRIVATE);
}
/*
* call-seq:
* mod.protected_method_defined?(symbol) -> true or false
* mod.protected_method_defined?(string) -> true or false
*
* Returns +true+ if the named protected method is defined
* by _mod_ (or its included modules and, if _mod_ is a
* class, its ancestors).
* String arguments are converted to symbols.
*
* module A
* def method1() end
* end
* class B
* protected
* def method2() end
* end
* class C < B
* include A
* def method3() end
* end
*
* A.method_defined? :method1 #=> true
* C.protected_method_defined? "method1" #=> false
* C.protected_method_defined? "method2" #=> true
* C.method_defined? "method2" #=> true
*/
static VALUE
rb_mod_protected_method_defined(VALUE mod, VALUE mid)
{
return check_definition(mod, mid, METHOD_VISI_PROTECTED);
}
int
rb_method_entry_eq(const rb_method_entry_t *m1, const rb_method_entry_t *m2)
{
return rb_method_definition_eq(m1->def, m2->def);
}
static const rb_method_definition_t *
original_method_definition(const rb_method_definition_t *def)
{
again:
if (def) {
switch (def->type) {
case VM_METHOD_TYPE_REFINED:
if (def->body.refined.orig_me) {
def = def->body.refined.orig_me->def;
goto again;
}
break;
case VM_METHOD_TYPE_ALIAS:
def = def->body.alias.original_me->def;
goto again;
default:
break;
}
}
return def;
}
static int
rb_method_definition_eq(const rb_method_definition_t *d1, const rb_method_definition_t *d2)
{
d1 = original_method_definition(d1);
d2 = original_method_definition(d2);
if (d1 == d2) return 1;
if (!d1 || !d2) return 0;
if (d1->type != d2->type) return 0;
switch (d1->type) {
case VM_METHOD_TYPE_ISEQ:
return d1->body.iseq.iseqptr == d2->body.iseq.iseqptr;
case VM_METHOD_TYPE_CFUNC:
return
d1->body.cfunc.func == d2->body.cfunc.func &&
d1->body.cfunc.argc == d2->body.cfunc.argc;
case VM_METHOD_TYPE_ATTRSET:
case VM_METHOD_TYPE_IVAR:
return d1->body.attr.id == d2->body.attr.id;
case VM_METHOD_TYPE_BMETHOD:
return RTEST(rb_equal(d1->body.proc, d2->body.proc));
case VM_METHOD_TYPE_MISSING:
return d1->original_id == d2->original_id;
case VM_METHOD_TYPE_ZSUPER:
case VM_METHOD_TYPE_NOTIMPLEMENTED:
case VM_METHOD_TYPE_UNDEF:
return 1;
case VM_METHOD_TYPE_OPTIMIZED:
return d1->body.optimize_type == d2->body.optimize_type;
case VM_METHOD_TYPE_REFINED:
case VM_METHOD_TYPE_ALIAS:
break;
}
rb_bug("rb_method_definition_eq: unsupported type: %d\n", d1->type);
}
static st_index_t
rb_hash_method_definition(st_index_t hash, const rb_method_definition_t *def)
{
hash = rb_hash_uint(hash, def->type);
def = original_method_definition(def);
if (!def) return hash;
switch (def->type) {
case VM_METHOD_TYPE_ISEQ:
return rb_hash_uint(hash, (st_index_t)def->body.iseq.iseqptr);
case VM_METHOD_TYPE_CFUNC:
hash = rb_hash_uint(hash, (st_index_t)def->body.cfunc.func);
return rb_hash_uint(hash, def->body.cfunc.argc);
case VM_METHOD_TYPE_ATTRSET:
case VM_METHOD_TYPE_IVAR:
return rb_hash_uint(hash, def->body.attr.id);
case VM_METHOD_TYPE_BMETHOD:
return rb_hash_proc(hash, def->body.proc);
case VM_METHOD_TYPE_MISSING:
return rb_hash_uint(hash, def->original_id);
case VM_METHOD_TYPE_ZSUPER:
case VM_METHOD_TYPE_NOTIMPLEMENTED:
case VM_METHOD_TYPE_UNDEF:
return hash;
case VM_METHOD_TYPE_OPTIMIZED:
return rb_hash_uint(hash, def->body.optimize_type);
case VM_METHOD_TYPE_REFINED:
case VM_METHOD_TYPE_ALIAS:
break; /* unreachable */
}
rb_bug("rb_hash_method_definition: unsupported method type (%d)\n", def->type);
}
st_index_t
rb_hash_method_entry(st_index_t hash, const rb_method_entry_t *me)
{
return rb_hash_method_definition(hash, me->def);
}
void
rb_alias(VALUE klass, ID alias_name, ID original_name)
{
const VALUE target_klass = klass;
VALUE defined_class;
const rb_method_entry_t *orig_me;
rb_method_visibility_t visi = METHOD_VISI_UNDEF;
if (NIL_P(klass)) {
rb_raise(rb_eTypeError, "no class to make alias");
}
rb_frozen_class_p(klass);
again:
orig_me = search_method(klass, original_name, &defined_class);
if (orig_me && orig_me->def->type == VM_METHOD_TYPE_REFINED) {
orig_me = rb_resolve_refined_method(Qnil, orig_me);
}
if (UNDEFINED_METHOD_ENTRY_P(orig_me) ||
UNDEFINED_REFINED_METHOD_P(orig_me->def)) {
if ((!RB_TYPE_P(klass, T_MODULE)) ||
(orig_me = search_method(rb_cObject, original_name, &defined_class),
UNDEFINED_METHOD_ENTRY_P(orig_me))) {
rb_print_undef(klass, original_name, METHOD_VISI_UNDEF);
}
}
if (orig_me->def->type == VM_METHOD_TYPE_ZSUPER) {
klass = RCLASS_SUPER(klass);
original_name = orig_me->def->original_id;
visi = METHOD_ENTRY_VISI(orig_me);
goto again;
}
if (visi == METHOD_VISI_UNDEF) visi = METHOD_ENTRY_VISI(orig_me);
if (orig_me->defined_class == 0) {
rb_method_entry_make(target_klass, alias_name, target_klass, visi,
VM_METHOD_TYPE_ALIAS, NULL, orig_me->called_id,
(void *)rb_method_entry_clone(orig_me));
method_added(target_klass, alias_name);
}
else {
rb_method_entry_t *alias_me;
alias_me = method_entry_set(target_klass, alias_name, orig_me, visi, orig_me->owner);
RB_OBJ_WRITE(alias_me, &alias_me->owner, target_klass);
RB_OBJ_WRITE(alias_me, &alias_me->defined_class, defined_class);
}
}
/*
* call-seq:
* alias_method(new_name, old_name) -> self
*
* Makes <i>new_name</i> a new copy of the method <i>old_name</i>. This can
* be used to retain access to methods that are overridden.
*
* module Mod
* alias_method :orig_exit, :exit
* def exit(code=0)
* puts "Exiting with code #{code}"
* orig_exit(code)
* end
* end
* include Mod
* exit(99)
*
* <em>produces:</em>
*
* Exiting with code 99
*/
static VALUE
rb_mod_alias_method(VALUE mod, VALUE newname, VALUE oldname)
{
ID oldid = rb_check_id(&oldname);
if (!oldid) {
rb_print_undef_str(mod, oldname);
}
rb_alias(mod, rb_to_id(newname), oldid);
return mod;
}
static void
set_method_visibility(VALUE self, int argc, const VALUE *argv, rb_method_visibility_t visi)
{
int i;
rb_check_frozen(self);
if (argc == 0) {
rb_warning("%"PRIsVALUE" with no argument is just ignored",
QUOTE_ID(rb_frame_callee()));
return;
}
for (i = 0; i < argc; i++) {
VALUE v = argv[i];
ID id = rb_check_id(&v);
if (!id) {
rb_print_undef_str(self, v);
}
rb_export_method(self, id, visi);
}
}
static VALUE
set_visibility(int argc, const VALUE *argv, VALUE module, rb_method_visibility_t visi)
{
if (argc == 0) {
rb_scope_visibility_set(visi);
}
else {
set_method_visibility(module, argc, argv, visi);
}
return module;
}
/*
* call-seq:
* public -> self
* public(symbol, ...) -> self
* public(string, ...) -> self
*
* With no arguments, sets the default visibility for subsequently
* defined methods to public. With arguments, sets the named methods to
* have public visibility.
* String arguments are converted to symbols.
*/
static VALUE
rb_mod_public(int argc, VALUE *argv, VALUE module)
{
return set_visibility(argc, argv, module, METHOD_VISI_PUBLIC);
}
/*
* call-seq:
* protected -> self
* protected(symbol, ...) -> self
* protected(string, ...) -> self
*
* With no arguments, sets the default visibility for subsequently
* defined methods to protected. With arguments, sets the named methods
* to have protected visibility.
* String arguments are converted to symbols.
*/
static VALUE
rb_mod_protected(int argc, VALUE *argv, VALUE module)
{
return set_visibility(argc, argv, module, METHOD_VISI_PROTECTED);
}
/*
* call-seq:
* private -> self
* private(symbol, ...) -> self
* private(string, ...) -> self
*
* With no arguments, sets the default visibility for subsequently
* defined methods to private. With arguments, sets the named methods
* to have private visibility.
* String arguments are converted to symbols.
*
* module Mod
* def a() end
* def b() end
* private
* def c() end
* private :a
* end
* Mod.private_instance_methods #=> [:a, :c]
*/
static VALUE
rb_mod_private(int argc, VALUE *argv, VALUE module)
{
return set_visibility(argc, argv, module, METHOD_VISI_PRIVATE);
}
/*
* call-seq:
* mod.public_class_method(symbol, ...) -> mod
* mod.public_class_method(string, ...) -> mod
*
* Makes a list of existing class methods public.
*
* String arguments are converted to symbols.
*/
static VALUE
rb_mod_public_method(int argc, VALUE *argv, VALUE obj)
{
set_method_visibility(rb_singleton_class(obj), argc, argv, METHOD_VISI_PUBLIC);
return obj;
}
/*
* call-seq:
* mod.private_class_method(symbol, ...) -> mod
* mod.private_class_method(string, ...) -> mod
*
* Makes existing class methods private. Often used to hide the default
* constructor <code>new</code>.
*
* String arguments are converted to symbols.
*
* class SimpleSingleton # Not thread safe
* private_class_method :new
* def SimpleSingleton.create(*args, &block)
* @me = new(*args, &block) if ! @me
* @me
* end
* end
*/
static VALUE
rb_mod_private_method(int argc, VALUE *argv, VALUE obj)
{
set_method_visibility(rb_singleton_class(obj), argc, argv, METHOD_VISI_PRIVATE);
return obj;
}
/*
* call-seq:
* public
* public(symbol, ...)
* public(string, ...)
*
* With no arguments, sets the default visibility for subsequently
* defined methods to public. With arguments, sets the named methods to
* have public visibility.
*
* String arguments are converted to symbols.
*/
static VALUE
top_public(int argc, VALUE *argv)
{
return rb_mod_public(argc, argv, rb_cObject);
}
/*
* call-seq:
* private
* private(symbol, ...)
* private(string, ...)
*
* With no arguments, sets the default visibility for subsequently
* defined methods to private. With arguments, sets the named methods to
* have private visibility.
*
* String arguments are converted to symbols.
*/
static VALUE
top_private(int argc, VALUE *argv)
{
return rb_mod_private(argc, argv, rb_cObject);
}
/*
* call-seq:
* module_function(symbol, ...) -> self
* module_function(string, ...) -> self
*
* Creates module functions for the named methods. These functions may
* be called with the module as a receiver, and also become available
* as instance methods to classes that mix in the module. Module
* functions are copies of the original, and so may be changed
* independently. The instance-method versions are made private. If
* used with no arguments, subsequently defined methods become module
* functions.
* String arguments are converted to symbols.
*
* module Mod
* def one
* "This is one"
* end
* module_function :one
* end
* class Cls
* include Mod
* def call_one
* one
* end
* end
* Mod.one #=> "This is one"
* c = Cls.new
* c.call_one #=> "This is one"
* module Mod
* def one
* "This is the new one"
* end
* end
* Mod.one #=> "This is one"
* c.call_one #=> "This is the new one"
*/
static VALUE
rb_mod_modfunc(int argc, VALUE *argv, VALUE module)
{
int i;
ID id;
const rb_method_entry_t *me;
if (!RB_TYPE_P(module, T_MODULE)) {
rb_raise(rb_eTypeError, "module_function must be called for modules");
}
if (argc == 0) {
rb_scope_module_func_set();
return module;
}
set_method_visibility(module, argc, argv, METHOD_VISI_PRIVATE);
for (i = 0; i < argc; i++) {
VALUE m = module;
id = rb_to_id(argv[i]);
for (;;) {
me = search_method(m, id, 0);
if (me == 0) {
me = search_method(rb_cObject, id, 0);
}
if (UNDEFINED_METHOD_ENTRY_P(me)) {
rb_print_undef(module, id, METHOD_VISI_UNDEF);
}
if (me->def->type != VM_METHOD_TYPE_ZSUPER) {
break; /* normal case: need not to follow 'super' link */
}
m = RCLASS_SUPER(m);
if (!m)
break;
}
rb_method_entry_set(rb_singleton_class(module), id, me, METHOD_VISI_PUBLIC);
}
return module;
}
int
rb_method_basic_definition_p(VALUE klass, ID id)
{
const rb_method_entry_t *me;
if (!klass) return TRUE; /* hidden object cannot be overridden */
me = rb_method_entry(klass, id);
return (me && METHOD_ENTRY_BASIC(me)) ? TRUE : FALSE;
}
static VALUE
call_method_entry(rb_thread_t *th, VALUE defined_class, VALUE obj, ID id,
const rb_method_entry_t *me, int argc, const VALUE *argv)
{
const rb_callable_method_entry_t *cme =
prepare_callable_method_entry(defined_class, id, me);
VALUE passed_block_handler = vm_passed_block_handler(th);
VALUE result = vm_call0(th, obj, id, argc, argv, cme);
vm_passed_block_handler_set(th, passed_block_handler);
return result;
}
static VALUE
basic_obj_respond_to_missing(rb_thread_t *th, VALUE klass, VALUE obj,
VALUE mid, VALUE priv)
{
VALUE defined_class, args[2];
const ID rtmid = idRespond_to_missing;
const rb_method_entry_t *const me =
method_entry_get(klass, rtmid, &defined_class);
if (!me || METHOD_ENTRY_BASIC(me)) return Qundef;
args[0] = mid;
args[1] = priv;
return call_method_entry(th, defined_class, obj, rtmid, me, 2, args);
}
static inline int
basic_obj_respond_to(rb_thread_t *th, VALUE obj, ID id, int pub)
{
VALUE klass = CLASS_OF(obj);
VALUE ret;
switch (rb_method_boundp(klass, id, pub|BOUND_RESPONDS)) {
case 2:
return FALSE;
case 0:
ret = basic_obj_respond_to_missing(th, klass, obj, ID2SYM(id),
pub ? Qfalse : Qtrue);
return RTEST(ret) && ret != Qundef;
default:
return TRUE;
}
}
static int
vm_respond_to(rb_thread_t *th, VALUE klass, VALUE obj, ID id, int priv)
{
VALUE defined_class;
const ID resid = idRespond_to;
const rb_method_entry_t *const me =
method_entry_get(klass, resid, &defined_class);
if (!me) return -1;
if (METHOD_ENTRY_BASIC(me)) {
return -1;
}
else {
int argc = 1;
VALUE args[2];
VALUE result;
args[0] = ID2SYM(id);
args[1] = Qtrue;
if (priv) {
argc = rb_method_entry_arity(me);
if (argc > 2) {
rb_raise(rb_eArgError,
"respond_to? must accept 1 or 2 arguments (requires %d)",
argc);
}
if (argc != 1) {
argc = 2;
}
else if (!NIL_P(ruby_verbose)) {
VALUE location = rb_method_entry_location(me);
rb_warn("%"PRIsVALUE"%c""respond_to?(:%"PRIsVALUE") uses"
" the deprecated method signature, which takes one parameter",
(FL_TEST(klass, FL_SINGLETON) ? obj : klass),
(FL_TEST(klass, FL_SINGLETON) ? '.' : '#'),
QUOTE_ID(id));
if (!NIL_P(location)) {
VALUE path = RARRAY_AREF(location, 0);
VALUE line = RARRAY_AREF(location, 1);
if (!NIL_P(path)) {
rb_compile_warn(RSTRING_PTR(path), NUM2INT(line),
"respond_to? is defined here");
}
}
}
}
result = call_method_entry(th, defined_class, obj, resid, me, argc, args);
return RTEST(result);
}
}
int
rb_obj_respond_to(VALUE obj, ID id, int priv)
{
rb_thread_t *th = GET_THREAD();
VALUE klass = CLASS_OF(obj);
int ret = vm_respond_to(th, klass, obj, id, priv);
if (ret == -1) ret = basic_obj_respond_to(th, obj, id, !priv);
return ret;
}
int
rb_respond_to(VALUE obj, ID id)
{
return rb_obj_respond_to(obj, id, FALSE);
}
/*
* call-seq:
* obj.respond_to?(symbol, include_all=false) -> true or false
* obj.respond_to?(string, include_all=false) -> true or false
*
* Returns +true+ if _obj_ responds to the given method. Private and
* protected methods are included in the search only if the optional
* second parameter evaluates to +true+.
*
* If the method is not implemented,
* as Process.fork on Windows, File.lchmod on GNU/Linux, etc.,
* false is returned.
*
* If the method is not defined, <code>respond_to_missing?</code>
* method is called and the result is returned.
*
* When the method name parameter is given as a string, the string is
* converted to a symbol.
*/
static VALUE
obj_respond_to(int argc, VALUE *argv, VALUE obj)
{
VALUE mid, priv;
ID id;
rb_thread_t *th = GET_THREAD();
rb_scan_args(argc, argv, "11", &mid, &priv);
if (!(id = rb_check_id(&mid))) {
VALUE ret = basic_obj_respond_to_missing(th, CLASS_OF(obj), obj,
rb_to_symbol(mid), priv);
if (ret == Qundef) ret = Qfalse;
return ret;
}
if (basic_obj_respond_to(th, obj, id, !RTEST(priv)))
return Qtrue;
return Qfalse;
}
/*
* call-seq:
* obj.respond_to_missing?(symbol, include_all) -> true or false
* obj.respond_to_missing?(string, include_all) -> true or false
*
* DO NOT USE THIS DIRECTLY.
*
* Hook method to return whether the _obj_ can respond to _id_ method
* or not.
*
* When the method name parameter is given as a string, the string is
* converted to a symbol.
*
* See #respond_to?, and the example of BasicObject.
*/
static VALUE
obj_respond_to_missing(VALUE obj, VALUE mid, VALUE priv)
{
return Qfalse;
}
void
Init_Method(void)
{
#if OPT_GLOBAL_METHOD_CACHE
char *ptr = getenv("RUBY_GLOBAL_METHOD_CACHE_SIZE");
int val;
if (ptr != NULL && (val = atoi(ptr)) > 0) {
if ((val & (val - 1)) == 0) { /* ensure val is a power of 2 */
global_method_cache.size = val;
global_method_cache.mask = val - 1;
}
else {
fprintf(stderr, "RUBY_GLOBAL_METHOD_CACHE_SIZE was set to %d but ignored because the value is not a power of 2.\n", val);
}
}
global_method_cache.entries = (struct cache_entry *)calloc(global_method_cache.size, sizeof(struct cache_entry));
if (global_method_cache.entries == NULL) {
fprintf(stderr, "[FATAL] failed to allocate memory\n");
exit(EXIT_FAILURE);
}
#endif
}
void
Init_eval_method(void)
{
#undef rb_intern
#define rb_intern(str) rb_intern_const(str)
rb_define_method(rb_mKernel, "respond_to?", obj_respond_to, -1);
rb_define_method(rb_mKernel, "respond_to_missing?", obj_respond_to_missing, 2);
rb_define_private_method(rb_cModule, "remove_method", rb_mod_remove_method, -1);
rb_define_private_method(rb_cModule, "undef_method", rb_mod_undef_method, -1);
rb_define_private_method(rb_cModule, "alias_method", rb_mod_alias_method, 2);
rb_define_private_method(rb_cModule, "public", rb_mod_public, -1);
rb_define_private_method(rb_cModule, "protected", rb_mod_protected, -1);
rb_define_private_method(rb_cModule, "private", rb_mod_private, -1);
rb_define_private_method(rb_cModule, "module_function", rb_mod_modfunc, -1);
rb_define_method(rb_cModule, "method_defined?", rb_mod_method_defined, 1);
rb_define_method(rb_cModule, "public_method_defined?", rb_mod_public_method_defined, 1);
rb_define_method(rb_cModule, "private_method_defined?", rb_mod_private_method_defined, 1);
rb_define_method(rb_cModule, "protected_method_defined?", rb_mod_protected_method_defined, 1);
rb_define_method(rb_cModule, "public_class_method", rb_mod_public_method, -1);
rb_define_method(rb_cModule, "private_class_method", rb_mod_private_method, -1);
rb_define_private_method(rb_singleton_class(rb_vm_top_self()),
"public", top_public, -1);
rb_define_private_method(rb_singleton_class(rb_vm_top_self()),
"private", top_private, -1);
{
#define REPLICATE_METHOD(klass, id) do { \
const rb_method_entry_t *me = rb_method_entry((klass), (id)); \
rb_method_entry_set((klass), (id), me, METHOD_ENTRY_VISI(me)); \
} while (0)
REPLICATE_METHOD(rb_eException, idMethodMissing);
REPLICATE_METHOD(rb_eException, idRespond_to);
REPLICATE_METHOD(rb_eException, idRespond_to_missing);
}
}
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