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vm_eval.c
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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
**********************************************************************/
struct local_var_list {
VALUE tbl;
};
static inline VALUE method_missing(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, int mjit_enable_p);
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 struct rb_call_info *ci, struct rb_call_cache *cc, const VALUE *argv);
#ifndef MJIT_HEADER
MJIT_FUNC_EXPORTED VALUE
rb_vm_call0(rb_execution_context_t *ec, VALUE recv, ID id, int argc, const VALUE *argv, const rb_callable_method_entry_t *me, int kw_splat)
{
struct rb_calling_info calling_entry, *calling;
struct rb_call_info ci_entry;
struct rb_call_cache cc_entry;
calling = &calling_entry;
ci_entry.flag = kw_splat ? VM_CALL_KW_SPLAT : 0;
ci_entry.mid = id;
cc_entry.me = me;
calling->recv = recv;
calling->argc = argc;
calling->kw_splat = kw_splat;
return vm_call0_body(ec, calling, &ci_entry, &cc_entry, argv);
}
static VALUE
vm_call0_cfunc_with_frame(rb_execution_context_t* ec, struct rb_calling_info *calling, const struct rb_call_info *ci, struct rb_call_cache *cc, const VALUE *argv)
{
VALUE val;
const rb_callable_method_entry_t *me = cc->me;
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 = ci->mid;
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])) {
frame_flags |= VM_FRAME_FLAG_CFRAME_EMPTY_KW;
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 struct rb_call_info *ci, struct rb_call_cache *cc, const VALUE *argv)
{
return vm_call0_cfunc_with_frame(ec, calling, ci, cc, argv);
}
/* `ci' should point temporal value (on stack value) */
static VALUE
vm_call0_body(rb_execution_context_t *ec, struct rb_calling_info *calling, const struct rb_call_info *ci, struct rb_call_cache *cc, const VALUE *argv)
{
VALUE ret;
calling->block_handler = vm_passed_block_handler(ec);
again:
switch (cc->me->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, ci, cc);
VM_ENV_FLAGS_SET(ec->cfp->ep, VM_FRAME_FLAG_FINISH);
return vm_exec(ec, TRUE); /* CHECK_INTS in this function */
}
case VM_METHOD_TYPE_NOTIMPLEMENTED:
case VM_METHOD_TYPE_CFUNC:
ret = vm_call0_cfunc(ec, calling, ci, cc, argv);
goto success;
case VM_METHOD_TYPE_ATTRSET:
if (calling->kw_splat &&
calling->argc > 0 &&
RB_TYPE_P(argv[calling->argc-1], T_HASH) &&
RHASH_EMPTY_P(argv[calling->argc-1])) {
if (calling->argc == 1) {
rb_warn("The keyword argument is passed as the last hash parameter");
}
else {
calling->argc--;
}
}
rb_check_arity(calling->argc, 1, 1);
ret = rb_ivar_set(calling->recv, cc->me->def->body.attr.id, argv[0]);
goto success;
case VM_METHOD_TYPE_IVAR:
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, 0, 0);
ret = rb_attr_get(calling->recv, cc->me->def->body.attr.id);
goto success;
case VM_METHOD_TYPE_BMETHOD:
ret = vm_call_bmethod_body(ec, calling, ci, cc, argv);
goto success;
case VM_METHOD_TYPE_ZSUPER:
case VM_METHOD_TYPE_REFINED:
{
const rb_method_type_t type = cc->me->def->type;
VALUE super_class = cc->me->defined_class;
if (type == VM_METHOD_TYPE_ZSUPER) {
super_class = RCLASS_ORIGIN(super_class);
}
else if (cc->me->def->body.refined.orig_me) {
cc->me = refined_method_callable_without_refinement(cc->me);
goto again;
}
super_class = RCLASS_SUPER(super_class);
if (!super_class || !(cc->me = rb_callable_method_entry(super_class, ci->mid))) {
enum method_missing_reason ex = (type == VM_METHOD_TYPE_ZSUPER) ? MISSING_SUPER : 0;
ret = method_missing(calling->recv, ci->mid, calling->argc, argv, ex, calling->kw_splat);
goto success;
}
RUBY_VM_CHECK_INTS(ec);
goto again;
}
case VM_METHOD_TYPE_ALIAS:
cc->me = aliased_callable_method_entry(cc->me);
goto again;
case VM_METHOD_TYPE_MISSING:
{
vm_passed_block_handler_set(ec, calling->block_handler);
return method_missing(calling->recv, ci->mid, calling->argc,
argv, MISSING_NOENTRY, calling->kw_splat);
}
case VM_METHOD_TYPE_OPTIMIZED:
switch (cc->me->def->body.optimize_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;
}
default:
rb_bug("vm_call0: unsupported optimized method type (%d)", cc->me->def->body.optimize_type);
}
break;
case VM_METHOD_TYPE_UNDEF:
break;
}
rb_bug("vm_call0: unsupported method type (%d)", cc->me->def->type);
return Qundef;
success:
RUBY_VM_CHECK_INTS(ec);
return ret;
}
/* Caller should keep the reference to the return value until argv becomes useless. */
MJIT_FUNC_EXPORTED VALUE
rb_adjust_argv_kw_splat(int *argc, const VALUE **argv, int *kw_splat)
{
if (*kw_splat == RB_PASS_CALLED_KEYWORDS || *kw_splat == RB_PASS_EMPTY_KEYWORDS) {
if (*kw_splat == RB_PASS_EMPTY_KEYWORDS || rb_empty_keyword_given_p()) {
int n = *argc;
VALUE v;
VALUE *ptr = rb_alloc_tmp_buffer2(&v, n+1, sizeof(VALUE));
memcpy(ptr, *argv, sizeof(VALUE)*n);
ptr[n] = rb_hash_new();
*argc = ++n;
*argv = ptr;
*kw_splat = 1;
return v;
}
else {
*kw_splat = rb_keyword_given_p();
}
}
if (*kw_splat && *argc > 0 && !RB_TYPE_P((*argv)[(*argc)-1], T_HASH)) {
rb_warn("Keyword flag passed calling internal method, but last entry is not a hash, unsetting keyword flag");
*kw_splat = 0;
}
return 0;
}
VALUE
rb_vm_call(rb_execution_context_t *ec, VALUE recv, VALUE id, int argc, const VALUE *argv, const rb_callable_method_entry_t *me)
{
return rb_vm_call0(ec, recv, id, argc, argv, me, RB_NO_KEYWORDS);
}
MJIT_FUNC_EXPORTED 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)
{
VALUE v = rb_adjust_argv_kw_splat(&argc, &argv, &kw_splat);
VALUE ret = rb_vm_call0(ec, recv, id, argc, argv, me, kw_splat);
rb_free_tmp_buffer(&v);
return ret;
}
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(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)
{
rb_execution_context_t *ec = GET_EC();
PASS_PASSED_BLOCK_HANDLER_EC(ec);
return vm_call_super(ec, 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;
}
#endif /* #ifndef MJIT_HEADER */
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);
}
}
#ifndef MJIT_HEADER
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);
/*!
* \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)
{
const rb_callable_method_entry_t *me;
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;
}
if (scope == CALL_PUBLIC) {
me = rb_callable_method_entry_with_refinements(CLASS_OF(recv), mid, NULL);
}
else {
me = rb_search_method_entry(recv, mid);
}
call_status = rb_method_call_status(ec, me, scope, self);
if (call_status != MISSING_NONE) {
return method_missing(recv, mid, argc, argv, call_status, kw_splat);
}
stack_check(ec);
return rb_vm_call_kw(ec, recv, mid, argc, argv, me, kw_splat);
}
struct rescue_funcall_args {
VALUE defined_class;
VALUE recv;
ID mid;
rb_execution_context_t *ec;
const rb_method_entry_t *me;
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->me, 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 (rb_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_method_entry_t *me;
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 = (ret != Qundef);
ret = def;
me = method_entry_get(klass, idMethodMissing, &args.defined_class);
if (me && !METHOD_ENTRY_BASIC(me)) {
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.me = me;
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;
}
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);
}
VALUE
rb_check_funcall_default_kw(VALUE recv, ID mid, int argc, const VALUE *argv, VALUE def, 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)
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 (ret == Qundef) 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)(ret != Qundef, 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;
}
NORETURN(static void uncallable_object(VALUE recv, ID mid));
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)
{
VALUE klass;
ID oid;
rb_method_visibility_t visi;
if (UNDEFINED_METHOD_ENTRY_P(me)) {
undefined:
return scope == CALL_VCALL ? MISSING_VCALL : MISSING_NOENTRY;
}
if (me->def->type == VM_METHOD_TYPE_REFINED) {
me = rb_resolve_refined_method_callable(Qnil, me);
if (UNDEFINED_METHOD_ENTRY_P(me)) goto undefined;
}
klass = me->owner;
oid = me->def->original_id;
visi = METHOD_ENTRY_VISI(me);
if (oid != idMethodMissing) {
/* receiver specified form for private method */
if (UNLIKELY(visi != METHOD_VISI_PUBLIC)) {
if (visi == METHOD_VISI_PRIVATE && scope == CALL_PUBLIC) {
return MISSING_PRIVATE;
}
/* self must be kind of a specified form for protected method */
if (visi == METHOD_VISI_PROTECTED && scope == CALL_PUBLIC) {
VALUE defined_class = klass;
if (RB_TYPE_P(defined_class, T_ICLASS)) {
defined_class = RBASIC(defined_class)->klass;
}
if (self == Qundef || !rb_obj_is_kind_of(self, defined_class)) {
return MISSING_PROTECTED;
}
}
}
}
return MISSING_NONE;
}
/*!
* \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);
}
MJIT_FUNC_EXPORTED 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 `%s' for %s%s%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);
}
}
#endif /* #ifndef MJIT_HEADER */
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 `%s' called for %s%s%s");
}
else if (last_call_status & MISSING_PROTECTED) {
format = rb_fstring_lit("protected method `%s' called for %s%s%s");
}
else if (last_call_status & MISSING_VCALL) {
format = rb_fstring_lit("undefined local variable or method `%s' for %s%s%s");
exc = rb_eNameError;
}
else if (last_call_status & MISSING_SUPER) {
format = rb_fstring_lit("super: no superclass method `%s' for %s%s%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();
}
rb_exc_raise(exc);
}
}
static void
vm_raise_method_missing(rb_execution_context_t *ec, int argc, const VALUE *argv,
VALUE obj, int call_status)
{
vm_passed_block_handler_set(ec, VM_BLOCK_HANDLER_NONE);
raise_method_missing(ec, argc, argv, obj, call_status | MISSING_MISSING);
}
static inline VALUE
method_missing(VALUE obj, ID id, int argc, const VALUE *argv, enum method_missing_reason call_status, int kw_splat)
{
VALUE *nargv, result, work, klass;
rb_execution_context_t *ec = GET_EC();
VALUE block_handler = vm_passed_block_handler(ec);
const rb_callable_method_entry_t *me;
ec->method_missing_reason = call_status;
if (id == idMethodMissing) {
missing:
raise_method_missing(ec, argc, argv, obj, call_status | MISSING_MISSING);
}
nargv = ALLOCV_N(VALUE, work, argc + 1);
nargv[0] = ID2SYM(id);
#ifdef __GLIBC__
if (!argv) {
static const VALUE buf = Qfalse;
VM_ASSERT(argc == 0);
argv = &buf;
}
#endif
MEMCPY(nargv + 1, argv, VALUE, argc);
++argc;
argv = nargv;
klass = CLASS_OF(obj);
if (!klass) goto missing;
me = rb_callable_method_entry(klass, idMethodMissing);
if (!me || METHOD_ENTRY_BASIC(me)) goto missing;
vm_passed_block_handler_set(ec, block_handler);
result = rb_vm_call_kw(ec, obj, idMethodMissing, argc, argv, me, kw_splat);
if (work) ALLOCV_END(work);
return result;
}
#ifndef MJIT_HEADER
/*!
* Calls a method
* \param recv receiver of the method
* \param mid an ID that represents the name of the method
* \param args an Array object which contains method arguments
*
* \pre \a args must refer an Array object.
*/
VALUE
rb_apply(VALUE recv, ID mid, VALUE args)
{
int argc;
VALUE *argv, ret;
argc = RARRAY_LENINT(args);
if (argc >= 0x100) {
args = rb_ary_subseq(args, 0, argc);
RBASIC_CLEAR_CLASS(args);
OBJ_FREEZE(args);
ret = rb_call(recv, mid, argc, RARRAY_CONST_PTR(args), CALL_FCALL);
RB_GC_GUARD(args);
return ret;
}
argv = ALLOCA_N(VALUE, argc);
MEMCPY(argv, RARRAY_CONST_PTR_TRANSIENT(args), VALUE, argc);
return rb_call(recv, mid, argc, argv, CALL_FCALL);
}
#ifdef rb_funcall
#undef rb_funcall
#endif
/*!
* Calls a method
* \param recv receiver of the method
* \param mid an ID that represents the name of the method
* \param n the number of arguments
* \param ... arbitrary number of method arguments
*
* \pre each of arguments after \a n must be a VALUE.
*/
VALUE
rb_funcall(VALUE recv, ID mid, int n, ...)
{
VALUE *argv;
va_list ar;
if (n > 0) {
long i;
va_init_list(ar, n);
argv = ALLOCA_N(VALUE, n);
for (i = 0; i < n; i++) {
argv[i] = va_arg(ar, VALUE);
}
va_end(ar);
}
else {
argv = 0;
}
return rb_call(recv, mid, n, argv, CALL_FCALL);
}
#ifdef rb_funcallv
#undef rb_funcallv
#endif
/*!
* Calls a method
* \param recv receiver of the method
* \param mid an ID that represents the name of the method
* \param argc the number of arguments
* \param argv pointer to an array of method arguments
*/
VALUE
rb_funcallv(VALUE recv, ID mid, int argc, const VALUE *argv)
{
return rb_call(recv, mid, argc, argv, CALL_FCALL);
}
VALUE
rb_funcallv_kw(VALUE recv, ID mid, int argc, const VALUE *argv, int kw_splat)
{
VALUE v = rb_adjust_argv_kw_splat(&argc, &argv, &kw_splat);
VALUE ret = rb_call(recv, mid, argc, argv, kw_splat ? CALL_FCALL_KW : CALL_FCALL);
rb_free_tmp_buffer(&v);
return ret;
}
/*!
* Calls a method.
*
* Same as rb_funcallv but this function can call only public methods.
* \param recv receiver of the method
* \param mid an ID that represents the name of the method
* \param argc the number of arguments
* \param argv pointer to an array of method arguments
*/
VALUE
rb_funcallv_public(VALUE recv, ID mid, int argc, const VALUE *argv)
{
return rb_call(recv, mid, argc, argv, CALL_PUBLIC);
}
/*!
* Calls a method
* \private
* \param cc opaque call cache
* \param recv receiver of the method
* \param mid an ID that represents the name of the method
* \param argc the number of arguments
* \param argv pointer to an array of method arguments
*/