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vm_eval.c
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/**********************************************************************
vm_eval.c -
$Author$
created at: Sat May 24 16:02:32 JST 2008
Copyright (C) 1993-2007 Yukihiro Matsumoto
Copyright (C) 2000 Network Applied Communication Laboratory, Inc.
Copyright (C) 2000 Information-technology Promotion Agency, Japan
**********************************************************************/
#include "internal/thread.h"
struct local_var_list {
VALUE tbl;
};
static inline VALUE method_missing(rb_execution_context_t *ec, VALUE obj, ID id, int argc, const VALUE *argv, enum method_missing_reason call_status, int kw_splat);
static inline VALUE vm_yield_with_cref(rb_execution_context_t *ec, int argc, const VALUE *argv, int kw_splat, const rb_cref_t *cref, int is_lambda);
static inline VALUE vm_yield(rb_execution_context_t *ec, int argc, const VALUE *argv, int kw_splat);
static inline VALUE vm_yield_with_block(rb_execution_context_t *ec, int argc, const VALUE *argv, VALUE block_handler, int kw_splat);
static inline VALUE vm_yield_force_blockarg(rb_execution_context_t *ec, VALUE args);
VALUE vm_exec(rb_execution_context_t *ec);
static void vm_set_eval_stack(rb_execution_context_t * th, const rb_iseq_t *iseq, const rb_cref_t *cref, const struct rb_block *base_block);
static int vm_collect_local_variables_in_heap(const VALUE *dfp, const struct local_var_list *vars);
static VALUE rb_eUncaughtThrow;
static ID id_result, id_tag, id_value;
#define id_mesg idMesg
typedef enum call_type {
CALL_PUBLIC,
CALL_FCALL,
CALL_VCALL,
CALL_PUBLIC_KW,
CALL_FCALL_KW,
CALL_TYPE_MAX
} call_type;
static VALUE send_internal(int argc, const VALUE *argv, VALUE recv, call_type scope);
static VALUE vm_call0_body(rb_execution_context_t* ec, struct rb_calling_info *calling, const VALUE *argv);
static VALUE *
vm_argv_ruby_array(VALUE *av, const VALUE *argv, int *flags, int *argc, int kw_splat)
{
*flags |= VM_CALL_ARGS_SPLAT;
VALUE argv_ary = rb_ary_hidden_new(*argc);
rb_ary_cat(argv_ary, argv, *argc);
*argc = 2;
av[0] = argv_ary;
if (kw_splat) {
av[1] = rb_ary_pop(argv_ary);
}
else {
// Make sure flagged keyword hash passed as regular argument
// isn't treated as keywords
*flags |= VM_CALL_KW_SPLAT;
av[1] = rb_hash_new();
}
return av;
}
static inline VALUE vm_call0_cc(rb_execution_context_t *ec, VALUE recv, ID id, int argc, const VALUE *argv, const struct rb_callcache *cc, int kw_splat);
VALUE
rb_vm_call0(rb_execution_context_t *ec, VALUE recv, ID id, int argc, const VALUE *argv, const rb_callable_method_entry_t *cme, int kw_splat)
{
const struct rb_callcache cc = VM_CC_ON_STACK(Qfalse, vm_call_general, {{ 0 }}, cme);
return vm_call0_cc(ec, recv, id, argc, argv, &cc, kw_splat);
}
VALUE
rb_vm_call_with_refinements(rb_execution_context_t *ec, VALUE recv, ID id, int argc, const VALUE *argv, int kw_splat)
{
const rb_callable_method_entry_t *me =
rb_callable_method_entry_with_refinements(CLASS_OF(recv), id, NULL);
if (me) {
return rb_vm_call0(ec, recv, id, argc, argv, me, kw_splat);
}
else {
/* fallback to funcall (e.g. method_missing) */
return rb_funcallv(recv, id, argc, argv);
}
}
static inline VALUE
vm_call0_cc(rb_execution_context_t *ec, VALUE recv, ID id, int argc, const VALUE *argv, const struct rb_callcache *cc, int kw_splat)
{
int flags = kw_splat ? VM_CALL_KW_SPLAT : 0;
VALUE *use_argv = (VALUE *)argv;
VALUE av[2];
if (UNLIKELY(vm_cc_cme(cc)->def->type == VM_METHOD_TYPE_ISEQ && argc > VM_ARGC_STACK_MAX)) {
use_argv = vm_argv_ruby_array(av, argv, &flags, &argc, kw_splat);
}
struct rb_calling_info calling = {
.ci = &VM_CI_ON_STACK(id, flags, argc, NULL),
.cc = cc,
.block_handler = vm_passed_block_handler(ec),
.recv = recv,
.argc = argc,
.kw_splat = kw_splat,
};
return vm_call0_body(ec, &calling, use_argv);
}
static VALUE
vm_call0_cme(rb_execution_context_t *ec, struct rb_calling_info *calling, const VALUE *argv, const rb_callable_method_entry_t *cme)
{
calling->cc = &VM_CC_ON_STACK(Qfalse, vm_call_general, {{ 0 }}, cme);
return vm_call0_body(ec, calling, argv);
}
static VALUE
vm_call0_super(rb_execution_context_t *ec, struct rb_calling_info *calling, const VALUE *argv, VALUE klass, enum method_missing_reason ex)
{
ID mid = vm_ci_mid(calling->ci);
klass = RCLASS_SUPER(klass);
if (klass) {
const rb_callable_method_entry_t *cme = rb_callable_method_entry(klass, mid);
if (cme) {
RUBY_VM_CHECK_INTS(ec);
return vm_call0_cme(ec, calling, argv, cme);
}
}
vm_passed_block_handler_set(ec, calling->block_handler);
return method_missing(ec, calling->recv, mid, calling->argc, argv, ex, calling->kw_splat);
}
static VALUE
vm_call0_cfunc_with_frame(rb_execution_context_t* ec, struct rb_calling_info *calling, const VALUE *argv)
{
const struct rb_callinfo *ci = calling->ci;
VALUE val;
const rb_callable_method_entry_t *me = vm_cc_cme(calling->cc);
const rb_method_cfunc_t *cfunc = UNALIGNED_MEMBER_PTR(me->def, body.cfunc);
int len = cfunc->argc;
VALUE recv = calling->recv;
int argc = calling->argc;
ID mid = vm_ci_mid(ci);
VALUE block_handler = calling->block_handler;
int frame_flags = VM_FRAME_MAGIC_CFUNC | VM_FRAME_FLAG_CFRAME | VM_ENV_FLAG_LOCAL;
if (calling->kw_splat) {
if (argc > 0 && RB_TYPE_P(argv[argc-1], T_HASH) && RHASH_EMPTY_P(argv[argc-1])) {
argc--;
}
else {
frame_flags |= VM_FRAME_FLAG_CFRAME_KW;
}
}
RUBY_DTRACE_CMETHOD_ENTRY_HOOK(ec, me->owner, me->def->original_id);
EXEC_EVENT_HOOK(ec, RUBY_EVENT_C_CALL, recv, me->def->original_id, mid, me->owner, Qnil);
{
rb_control_frame_t *reg_cfp = ec->cfp;
vm_push_frame(ec, 0, frame_flags, recv,
block_handler, (VALUE)me,
0, reg_cfp->sp, 0, 0);
if (len >= 0) rb_check_arity(argc, len, len);
val = (*cfunc->invoker)(recv, argc, argv, cfunc->func);
CHECK_CFP_CONSISTENCY("vm_call0_cfunc_with_frame");
rb_vm_pop_frame(ec);
}
EXEC_EVENT_HOOK(ec, RUBY_EVENT_C_RETURN, recv, me->def->original_id, mid, me->owner, val);
RUBY_DTRACE_CMETHOD_RETURN_HOOK(ec, me->owner, me->def->original_id);
return val;
}
static VALUE
vm_call0_cfunc(rb_execution_context_t *ec, struct rb_calling_info *calling, const VALUE *argv)
{
return vm_call0_cfunc_with_frame(ec, calling, argv);
}
static void
vm_call_check_arity(struct rb_calling_info *calling, int argc, const VALUE *argv)
{
if (calling->kw_splat &&
calling->argc > 0 &&
RB_TYPE_P(argv[calling->argc-1], T_HASH) &&
RHASH_EMPTY_P(argv[calling->argc-1])) {
calling->argc--;
}
rb_check_arity(calling->argc, argc, argc);
}
/* `ci' should point temporal value (on stack value) */
static VALUE
vm_call0_body(rb_execution_context_t *ec, struct rb_calling_info *calling, const VALUE *argv)
{
const struct rb_callinfo *ci = calling->ci;
const struct rb_callcache *cc = calling->cc;
VALUE ret;
retry:
switch (vm_cc_cme(cc)->def->type) {
case VM_METHOD_TYPE_ISEQ:
{
rb_control_frame_t *reg_cfp = ec->cfp;
int i;
CHECK_VM_STACK_OVERFLOW(reg_cfp, calling->argc + 1);
vm_check_canary(ec, reg_cfp->sp);
*reg_cfp->sp++ = calling->recv;
for (i = 0; i < calling->argc; i++) {
*reg_cfp->sp++ = argv[i];
}
vm_call_iseq_setup(ec, reg_cfp, calling);
VM_ENV_FLAGS_SET(ec->cfp->ep, VM_FRAME_FLAG_FINISH);
return vm_exec(ec); // CHECK_INTS in this function
}
case VM_METHOD_TYPE_NOTIMPLEMENTED:
case VM_METHOD_TYPE_CFUNC:
ret = vm_call0_cfunc(ec, calling, argv);
goto success;
case VM_METHOD_TYPE_ATTRSET:
vm_call_check_arity(calling, 1, argv);
VM_CALL_METHOD_ATTR(ret,
rb_ivar_set(calling->recv, vm_cc_cme(cc)->def->body.attr.id, argv[0]),
(void)0);
goto success;
case VM_METHOD_TYPE_IVAR:
vm_call_check_arity(calling, 0, argv);
VM_CALL_METHOD_ATTR(ret,
rb_attr_get(calling->recv, vm_cc_cme(cc)->def->body.attr.id),
(void)0);
goto success;
case VM_METHOD_TYPE_BMETHOD:
ret = vm_call_bmethod_body(ec, calling, argv);
goto success;
case VM_METHOD_TYPE_ZSUPER:
{
VALUE klass = RCLASS_ORIGIN(vm_cc_cme(cc)->defined_class);
return vm_call0_super(ec, calling, argv, klass, MISSING_SUPER);
}
case VM_METHOD_TYPE_REFINED:
{
const rb_callable_method_entry_t *cme = vm_cc_cme(cc);
if (cme->def->body.refined.orig_me) {
const rb_callable_method_entry_t *orig_cme = refined_method_callable_without_refinement(cme);
return vm_call0_cme(ec, calling, argv, orig_cme);
}
VALUE klass = cme->defined_class;
return vm_call0_super(ec, calling, argv, klass, 0);
}
case VM_METHOD_TYPE_ALIAS:
{
const rb_callable_method_entry_t *cme = vm_cc_cme(cc);
const rb_callable_method_entry_t *orig_cme = aliased_callable_method_entry(cme);
if (cme == orig_cme) rb_bug("same!!");
if (vm_cc_markable(cc)) {
return vm_call0_cme(ec, calling, argv, orig_cme);
}
else {
*((const rb_callable_method_entry_t **)&cc->cme_) = orig_cme;
goto retry;
}
}
case VM_METHOD_TYPE_MISSING:
{
vm_passed_block_handler_set(ec, calling->block_handler);
return method_missing(ec, calling->recv, vm_ci_mid(ci), calling->argc,
argv, MISSING_NOENTRY, calling->kw_splat);
}
case VM_METHOD_TYPE_OPTIMIZED:
switch (vm_cc_cme(cc)->def->body.optimized.type) {
case OPTIMIZED_METHOD_TYPE_SEND:
ret = send_internal(calling->argc, argv, calling->recv, calling->kw_splat ? CALL_FCALL_KW : CALL_FCALL);
goto success;
case OPTIMIZED_METHOD_TYPE_CALL:
{
rb_proc_t *proc;
GetProcPtr(calling->recv, proc);
ret = rb_vm_invoke_proc(ec, proc, calling->argc, argv, calling->kw_splat, calling->block_handler);
goto success;
}
case OPTIMIZED_METHOD_TYPE_STRUCT_AREF:
vm_call_check_arity(calling, 0, argv);
ret = vm_call_opt_struct_aref0(ec, calling);
goto success;
case OPTIMIZED_METHOD_TYPE_STRUCT_ASET:
vm_call_check_arity(calling, 1, argv);
ret = vm_call_opt_struct_aset0(ec, calling, argv[0]);
goto success;
default:
rb_bug("vm_call0: unsupported optimized method type (%d)", vm_cc_cme(cc)->def->body.optimized.type);
}
break;
case VM_METHOD_TYPE_UNDEF:
break;
}
rb_bug("vm_call0: unsupported method type (%d)", vm_cc_cme(cc)->def->type);
return Qundef;
success:
RUBY_VM_CHECK_INTS(ec);
return ret;
}
VALUE
rb_vm_call_kw(rb_execution_context_t *ec, VALUE recv, VALUE id, int argc, const VALUE *argv, const rb_callable_method_entry_t *me, int kw_splat)
{
return rb_vm_call0(ec, recv, id, argc, argv, me, kw_splat);
}
static inline VALUE
vm_call_super(rb_execution_context_t *ec, int argc, const VALUE *argv, int kw_splat)
{
VALUE recv = ec->cfp->self;
VALUE klass;
ID id;
rb_control_frame_t *cfp = ec->cfp;
const rb_callable_method_entry_t *me = rb_vm_frame_method_entry(cfp);
if (VM_FRAME_RUBYFRAME_P(cfp)) {
rb_bug("vm_call_super: should not be reached");
}
klass = RCLASS_ORIGIN(me->defined_class);
klass = RCLASS_SUPER(klass);
id = me->def->original_id;
me = rb_callable_method_entry(klass, id);
if (!me) {
return method_missing(ec, recv, id, argc, argv, MISSING_SUPER, kw_splat);
}
return rb_vm_call_kw(ec, recv, id, argc, argv, me, kw_splat);
}
VALUE
rb_call_super_kw(int argc, const VALUE *argv, int kw_splat)
{
rb_execution_context_t *ec = GET_EC();
PASS_PASSED_BLOCK_HANDLER_EC(ec);
return vm_call_super(ec, argc, argv, kw_splat);
}
VALUE
rb_call_super(int argc, const VALUE *argv)
{
return rb_call_super_kw(argc, argv, RB_NO_KEYWORDS);
}
VALUE
rb_current_receiver(void)
{
const rb_execution_context_t *ec = GET_EC();
rb_control_frame_t *cfp;
if (!ec || !(cfp = ec->cfp)) {
rb_raise(rb_eRuntimeError, "no self, no life");
}
return cfp->self;
}
static inline void
stack_check(rb_execution_context_t *ec)
{
if (!rb_ec_raised_p(ec, RAISED_STACKOVERFLOW) &&
rb_ec_stack_check(ec)) {
rb_ec_raised_set(ec, RAISED_STACKOVERFLOW);
rb_ec_stack_overflow(ec, FALSE);
}
}
void
rb_check_stack_overflow(void)
{
#ifndef RB_THREAD_LOCAL_SPECIFIER
if (!ruby_current_ec_key) return;
#endif
rb_execution_context_t *ec = GET_EC();
if (ec) stack_check(ec);
}
NORETURN(static void uncallable_object(VALUE recv, ID mid));
static inline const rb_callable_method_entry_t *rb_search_method_entry(VALUE recv, ID mid);
static inline enum method_missing_reason rb_method_call_status(rb_execution_context_t *ec, const rb_callable_method_entry_t *me, call_type scope, VALUE self);
static const struct rb_callcache *
cc_new(VALUE klass, ID mid, int argc, const rb_callable_method_entry_t *cme)
{
const struct rb_callcache *cc = NULL;
RB_VM_LOCK_ENTER();
{
struct rb_class_cc_entries *ccs;
struct rb_id_table *cc_tbl = RCLASS_CC_TBL(klass);
VALUE ccs_data;
if (rb_id_table_lookup(cc_tbl, mid, &ccs_data)) {
// ok
ccs = (struct rb_class_cc_entries *)ccs_data;
}
else {
ccs = vm_ccs_create(klass, cc_tbl, mid, cme);
}
for (int i=0; i<ccs->len; i++) {
cc = ccs->entries[i].cc;
if (vm_cc_cme(cc) == cme) {
break;
}
cc = NULL;
}
if (cc == NULL) {
const struct rb_callinfo *ci = vm_ci_new(mid, 0, argc, NULL); // TODO: proper ci
cc = vm_cc_new(klass, cme, vm_call_general);
METHOD_ENTRY_CACHED_SET((struct rb_callable_method_entry_struct *)cme);
vm_ccs_push(klass, ccs, ci, cc);
}
}
RB_VM_LOCK_LEAVE();
return cc;
}
static VALUE
gccct_hash(VALUE klass, ID mid)
{
return (klass >> 3) ^ (VALUE)mid;
}
NOINLINE(static const struct rb_callcache *gccct_method_search_slowpath(rb_vm_t *vm, VALUE klass, ID mid, int argc, unsigned int index));
static const struct rb_callcache *
gccct_method_search_slowpath(rb_vm_t *vm, VALUE klass, ID mid, int argc, unsigned int index)
{
const rb_callable_method_entry_t *cme = rb_callable_method_entry(klass, mid);
const struct rb_callcache *cc;
if (cme != NULL) {
cc = cc_new(klass, mid, argc, cme);
}
else {
cc = NULL;
}
return vm->global_cc_cache_table[index] = cc;
}
static inline const struct rb_callcache *
gccct_method_search(rb_execution_context_t *ec, VALUE recv, ID mid, int argc)
{
VALUE klass;
if (!SPECIAL_CONST_P(recv)) {
klass = RBASIC_CLASS(recv);
if (UNLIKELY(!klass)) uncallable_object(recv, mid);
}
else {
klass = CLASS_OF(recv);
}
// search global method cache
unsigned int index = (unsigned int)(gccct_hash(klass, mid) % VM_GLOBAL_CC_CACHE_TABLE_SIZE);
rb_vm_t *vm = rb_ec_vm_ptr(ec);
const struct rb_callcache *cc = vm->global_cc_cache_table[index];
if (LIKELY(cc)) {
if (LIKELY(vm_cc_class_check(cc, klass))) {
const rb_callable_method_entry_t *cme = vm_cc_cme(cc);
if (LIKELY(!METHOD_ENTRY_INVALIDATED(cme) &&
cme->called_id == mid)) {
VM_ASSERT(vm_cc_check_cme(cc, rb_callable_method_entry(klass, mid)));
RB_DEBUG_COUNTER_INC(gccct_hit);
return cc;
}
}
}
else {
RB_DEBUG_COUNTER_INC(gccct_null);
}
RB_DEBUG_COUNTER_INC(gccct_miss);
return gccct_method_search_slowpath(vm, klass, mid, argc, index);
}
/*!
* \internal
* calls the specified method.
*
* This function is called by functions in rb_call* family.
* \param ec current execution context
* \param recv receiver of the method
* \param mid an ID that represents the name of the method
* \param argc the number of method arguments
* \param argv a pointer to an array of method arguments
* \param scope
* \param self self in the caller. Qundef means no self is considered and
* protected methods cannot be called
*
* \note \a self is used in order to controlling access to protected methods.
*/
static inline VALUE
rb_call0(rb_execution_context_t *ec,
VALUE recv, ID mid, int argc, const VALUE *argv,
call_type call_scope, VALUE self)
{
enum method_missing_reason call_status;
call_type scope = call_scope;
int kw_splat = RB_NO_KEYWORDS;
switch (scope) {
case CALL_PUBLIC_KW:
scope = CALL_PUBLIC;
kw_splat = 1;
break;
case CALL_FCALL_KW:
scope = CALL_FCALL;
kw_splat = 1;
break;
default:
break;
}
const struct rb_callcache *cc = gccct_method_search(ec, recv, mid, argc);
if (scope == CALL_PUBLIC) {
RB_DEBUG_COUNTER_INC(call0_public);
const rb_callable_method_entry_t *cc_cme = cc ? vm_cc_cme(cc) : NULL;
const rb_callable_method_entry_t *cme = callable_method_entry_refeinements0(CLASS_OF(recv), mid, NULL, true, cc_cme);
call_status = rb_method_call_status(ec, cme, scope, self);
if (UNLIKELY(call_status != MISSING_NONE)) {
return method_missing(ec, recv, mid, argc, argv, call_status, kw_splat);
}
else if (UNLIKELY(cc_cme != cme)) { // refinement is solved
stack_check(ec);
return rb_vm_call_kw(ec, recv, mid, argc, argv, cme, kw_splat);
}
}
else {
RB_DEBUG_COUNTER_INC(call0_other);
call_status = rb_method_call_status(ec, cc ? vm_cc_cme(cc) : NULL, scope, self);
if (UNLIKELY(call_status != MISSING_NONE)) {
return method_missing(ec, recv, mid, argc, argv, call_status, kw_splat);
}
}
stack_check(ec);
return vm_call0_cc(ec, recv, mid, argc, argv, cc, kw_splat);
}
struct rescue_funcall_args {
VALUE defined_class;
VALUE recv;
ID mid;
rb_execution_context_t *ec;
const rb_callable_method_entry_t *cme;
unsigned int respond: 1;
unsigned int respond_to_missing: 1;
int argc;
const VALUE *argv;
int kw_splat;
};
static VALUE
check_funcall_exec(VALUE v)
{
struct rescue_funcall_args *args = (void *)v;
return call_method_entry(args->ec, args->defined_class,
args->recv, idMethodMissing,
args->cme, args->argc, args->argv, args->kw_splat);
}
static VALUE
check_funcall_failed(VALUE v, VALUE e)
{
struct rescue_funcall_args *args = (void *)v;
int ret = args->respond;
if (!ret) {
switch (method_boundp(args->defined_class, args->mid,
BOUND_PRIVATE|BOUND_RESPONDS)) {
case 2:
ret = TRUE;
break;
case 0:
ret = args->respond_to_missing;
break;
default:
ret = FALSE;
break;
}
}
if (ret) {
rb_exc_raise(e);
}
return Qundef;
}
static int
check_funcall_respond_to(rb_execution_context_t *ec, VALUE klass, VALUE recv, ID mid)
{
return vm_respond_to(ec, klass, recv, mid, TRUE);
}
static int
check_funcall_callable(rb_execution_context_t *ec, const rb_callable_method_entry_t *me)
{
return rb_method_call_status(ec, me, CALL_FCALL, ec->cfp->self) == MISSING_NONE;
}
static VALUE
check_funcall_missing(rb_execution_context_t *ec, VALUE klass, VALUE recv, ID mid, int argc, const VALUE *argv, int respond, VALUE def, int kw_splat)
{
struct rescue_funcall_args args;
const rb_callable_method_entry_t *cme;
VALUE ret = Qundef;
ret = basic_obj_respond_to_missing(ec, klass, recv,
ID2SYM(mid), Qtrue);
if (!RTEST(ret)) return def;
args.respond = respond > 0;
args.respond_to_missing = !UNDEF_P(ret);
ret = def;
cme = callable_method_entry(klass, idMethodMissing, &args.defined_class);
if (cme && !METHOD_ENTRY_BASIC(cme)) {
VALUE argbuf, *new_args = ALLOCV_N(VALUE, argbuf, argc+1);
new_args[0] = ID2SYM(mid);
#ifdef __GLIBC__
if (!argv) {
static const VALUE buf = Qfalse;
VM_ASSERT(argc == 0);
argv = &buf;
}
#endif
MEMCPY(new_args+1, argv, VALUE, argc);
ec->method_missing_reason = MISSING_NOENTRY;
args.ec = ec;
args.recv = recv;
args.cme = cme;
args.mid = mid;
args.argc = argc + 1;
args.argv = new_args;
args.kw_splat = kw_splat;
ret = rb_rescue2(check_funcall_exec, (VALUE)&args,
check_funcall_failed, (VALUE)&args,
rb_eNoMethodError, (VALUE)0);
ALLOCV_END(argbuf);
}
return ret;
}
static VALUE rb_check_funcall_default_kw(VALUE recv, ID mid, int argc, const VALUE *argv, VALUE def, int kw_splat);
VALUE
rb_check_funcall_kw(VALUE recv, ID mid, int argc, const VALUE *argv, int kw_splat)
{
return rb_check_funcall_default_kw(recv, mid, argc, argv, Qundef, kw_splat);
}
VALUE
rb_check_funcall(VALUE recv, ID mid, int argc, const VALUE *argv)
{
return rb_check_funcall_default_kw(recv, mid, argc, argv, Qundef, RB_NO_KEYWORDS);
}
static VALUE
rb_check_funcall_default_kw(VALUE recv, ID mid, int argc, const VALUE *argv, VALUE def, int kw_splat)
{
VM_ASSERT(ruby_thread_has_gvl_p());
VALUE klass = CLASS_OF(recv);
const rb_callable_method_entry_t *me;
rb_execution_context_t *ec = GET_EC();
int respond = check_funcall_respond_to(ec, klass, recv, mid);
if (!respond)
return def;
me = rb_search_method_entry(recv, mid);
if (!check_funcall_callable(ec, me)) {
VALUE ret = check_funcall_missing(ec, klass, recv, mid, argc, argv,
respond, def, kw_splat);
if (UNDEF_P(ret)) ret = def;
return ret;
}
stack_check(ec);
return rb_vm_call_kw(ec, recv, mid, argc, argv, me, kw_splat);
}
VALUE
rb_check_funcall_default(VALUE recv, ID mid, int argc, const VALUE *argv, VALUE def)
{
return rb_check_funcall_default_kw(recv, mid, argc, argv, def, RB_NO_KEYWORDS);
}
VALUE
rb_check_funcall_with_hook_kw(VALUE recv, ID mid, int argc, const VALUE *argv,
rb_check_funcall_hook *hook, VALUE arg, int kw_splat)
{
VALUE klass = CLASS_OF(recv);
const rb_callable_method_entry_t *me;
rb_execution_context_t *ec = GET_EC();
int respond = check_funcall_respond_to(ec, klass, recv, mid);
if (!respond) {
(*hook)(FALSE, recv, mid, argc, argv, arg);
return Qundef;
}
me = rb_search_method_entry(recv, mid);
if (!check_funcall_callable(ec, me)) {
VALUE ret = check_funcall_missing(ec, klass, recv, mid, argc, argv,
respond, Qundef, kw_splat);
(*hook)(!UNDEF_P(ret), recv, mid, argc, argv, arg);
return ret;
}
stack_check(ec);
(*hook)(TRUE, recv, mid, argc, argv, arg);
return rb_vm_call_kw(ec, recv, mid, argc, argv, me, kw_splat);
}
VALUE
rb_check_funcall_with_hook(VALUE recv, ID mid, int argc, const VALUE *argv,
rb_check_funcall_hook *hook, VALUE arg)
{
return rb_check_funcall_with_hook_kw(recv, mid, argc, argv, hook, arg, RB_NO_KEYWORDS);
}
const char *
rb_type_str(enum ruby_value_type type)
{
#define type_case(t) t: return #t
switch (type) {
case type_case(T_NONE);
case type_case(T_OBJECT);
case type_case(T_CLASS);
case type_case(T_MODULE);
case type_case(T_FLOAT);
case type_case(T_STRING);
case type_case(T_REGEXP);
case type_case(T_ARRAY);
case type_case(T_HASH);
case type_case(T_STRUCT);
case type_case(T_BIGNUM);
case type_case(T_FILE);
case type_case(T_DATA);
case type_case(T_MATCH);
case type_case(T_COMPLEX);
case type_case(T_RATIONAL);
case type_case(T_NIL);
case type_case(T_TRUE);
case type_case(T_FALSE);
case type_case(T_SYMBOL);
case type_case(T_FIXNUM);
case type_case(T_IMEMO);
case type_case(T_UNDEF);
case type_case(T_NODE);
case type_case(T_ICLASS);
case type_case(T_ZOMBIE);
case type_case(T_MOVED);
case T_MASK: break;
}
#undef type_case
return NULL;
}
static void
uncallable_object(VALUE recv, ID mid)
{
VALUE flags;
int type;
const char *typestr;
VALUE mname = rb_id2str(mid);
if (SPECIAL_CONST_P(recv)) {
rb_raise(rb_eNotImpError,
"method `%"PRIsVALUE"' called on unexpected immediate object (%p)",
mname, (void *)recv);
}
else if ((flags = RBASIC(recv)->flags) == 0) {
rb_raise(rb_eNotImpError,
"method `%"PRIsVALUE"' called on terminated object (%p)",
mname, (void *)recv);
}
else if (!(typestr = rb_type_str(type = BUILTIN_TYPE(recv)))) {
rb_raise(rb_eNotImpError,
"method `%"PRIsVALUE"' called on broken T_?""?""?(0x%02x) object"
" (%p flags=0x%"PRIxVALUE")",
mname, type, (void *)recv, flags);
}
else if (T_OBJECT <= type && type < T_NIL) {
rb_raise(rb_eNotImpError,
"method `%"PRIsVALUE"' called on hidden %s object"
" (%p flags=0x%"PRIxVALUE")",
mname, typestr, (void *)recv, flags);
}
else {
rb_raise(rb_eNotImpError,
"method `%"PRIsVALUE"' called on unexpected %s object"
" (%p flags=0x%"PRIxVALUE")",
mname, typestr, (void *)recv, flags);
}
}
static inline const rb_callable_method_entry_t *
rb_search_method_entry(VALUE recv, ID mid)
{
VALUE klass = CLASS_OF(recv);
if (!klass) uncallable_object(recv, mid);
return rb_callable_method_entry(klass, mid);
}
static inline enum method_missing_reason
rb_method_call_status(rb_execution_context_t *ec, const rb_callable_method_entry_t *me, call_type scope, VALUE self)
{
if (UNLIKELY(UNDEFINED_METHOD_ENTRY_P(me))) {
goto undefined;
}
else if (UNLIKELY(me->def->type == VM_METHOD_TYPE_REFINED)) {
me = rb_resolve_refined_method_callable(Qnil, me);
if (UNDEFINED_METHOD_ENTRY_P(me)) goto undefined;
}
rb_method_visibility_t visi = METHOD_ENTRY_VISI(me);
/* receiver specified form for private method */
if (UNLIKELY(visi != METHOD_VISI_PUBLIC)) {
if (me->def->original_id == idMethodMissing) {
return MISSING_NONE;
}
else if (visi == METHOD_VISI_PRIVATE &&
scope == CALL_PUBLIC) {
return MISSING_PRIVATE;
}
/* self must be kind of a specified form for protected method */
else if (visi == METHOD_VISI_PROTECTED &&
scope == CALL_PUBLIC) {
VALUE defined_class = me->owner;
if (RB_TYPE_P(defined_class, T_ICLASS)) {
defined_class = RBASIC(defined_class)->klass;
}
if (UNDEF_P(self) || !rb_obj_is_kind_of(self, defined_class)) {
return MISSING_PROTECTED;
}
}
}
return MISSING_NONE;
undefined:
return scope == CALL_VCALL ? MISSING_VCALL : MISSING_NOENTRY;
}
/*!
* \internal
* calls the specified method.
*
* This function is called by functions in rb_call* family.
* \param recv receiver
* \param mid an ID that represents the name of the method
* \param argc the number of method arguments
* \param argv a pointer to an array of method arguments
* \param scope
*/
static inline VALUE
rb_call(VALUE recv, ID mid, int argc, const VALUE *argv, call_type scope)
{
rb_execution_context_t *ec = GET_EC();
return rb_call0(ec, recv, mid, argc, argv, scope, ec->cfp->self);
}
NORETURN(static void raise_method_missing(rb_execution_context_t *ec, int argc, const VALUE *argv,
VALUE obj, enum method_missing_reason call_status));
/*
* call-seq:
* obj.method_missing(symbol [, *args] ) -> result
*
* Invoked by Ruby when <i>obj</i> is sent a message it cannot handle.
* <i>symbol</i> is the symbol for the method called, and <i>args</i>
* are any arguments that were passed to it. By default, the interpreter
* raises an error when this method is called. However, it is possible
* to override the method to provide more dynamic behavior.
* If it is decided that a particular method should not be handled, then
* <i>super</i> should be called, so that ancestors can pick up the
* missing method.
* The example below creates
* a class <code>Roman</code>, which responds to methods with names
* consisting of roman numerals, returning the corresponding integer
* values.
*
* class Roman
* def roman_to_int(str)
* # ...
* end
*
* def method_missing(symbol, *args)
* str = symbol.id2name
* begin
* roman_to_int(str)
* rescue
* super(symbol, *args)
* end
* end
* end
*
* r = Roman.new
* r.iv #=> 4
* r.xxiii #=> 23
* r.mm #=> 2000
* r.foo #=> NoMethodError
*/
static VALUE
rb_method_missing(int argc, const VALUE *argv, VALUE obj)
{
rb_execution_context_t *ec = GET_EC();
raise_method_missing(ec, argc, argv, obj, ec->method_missing_reason);
UNREACHABLE_RETURN(Qnil);
}
VALUE
rb_make_no_method_exception(VALUE exc, VALUE format, VALUE obj,
int argc, const VALUE *argv, int priv)
{
VALUE name = argv[0];
if (!format) {
format = rb_fstring_lit("undefined method `%1$s' for %3$s%4$s");
}
if (exc == rb_eNoMethodError) {
VALUE args = rb_ary_new4(argc - 1, argv + 1);
return rb_nomethod_err_new(format, obj, name, args, priv);
}
else {
return rb_name_err_new(format, obj, name);
}
}
static void
raise_method_missing(rb_execution_context_t *ec, int argc, const VALUE *argv, VALUE obj,
enum method_missing_reason last_call_status)
{
VALUE exc = rb_eNoMethodError;
VALUE format = 0;
if (UNLIKELY(argc == 0)) {
rb_raise(rb_eArgError, "no method name given");
}
else if (UNLIKELY(!SYMBOL_P(argv[0]))) {
const VALUE e = rb_eArgError; /* TODO: TypeError? */
rb_raise(e, "method name must be a Symbol but %"PRIsVALUE" is given",
rb_obj_class(argv[0]));
}
stack_check(ec);
if (last_call_status & MISSING_PRIVATE) {
format = rb_fstring_lit("private method `%1$s' called for %3$s%4$s");
}
else if (last_call_status & MISSING_PROTECTED) {
format = rb_fstring_lit("protected method `%1$s' called for %3$s%4$s");
}
else if (last_call_status & MISSING_VCALL) {
format = rb_fstring_lit("undefined local variable or method `%1$s' for %3$s%4$s");
exc = rb_eNameError;
}
else if (last_call_status & MISSING_SUPER) {
format = rb_fstring_lit("super: no superclass method `%1$s' for %3$s%4$s");
}
{
exc = rb_make_no_method_exception(exc, format, obj, argc, argv,
last_call_status & (MISSING_FCALL|MISSING_VCALL));
if (!(last_call_status & MISSING_MISSING)) {
rb_vm_pop_cfunc_frame();
}