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ruby/vm_eval.c

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79 KiB
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
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 = {
.cd = &(struct rb_call_data) {
.ci = &VM_CI_ON_STACK(id, flags, argc, NULL),
.cc = 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->cd->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->cd->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->cd->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);
VM_CALL_METHOD_ATTR(ret,
vm_call_opt_struct_aref0(ec, calling),
(void)0);
goto success;
case OPTIMIZED_METHOD_TYPE_STRUCT_ASET:
vm_call_check_arity(calling, 1, argv);
VM_CALL_METHOD_ATTR(ret,
vm_call_opt_struct_aset0(ec, calling, argv[0]),
(void)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 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, unsigned int index, const struct rb_callinfo * ci));
static const struct rb_callcache *
gccct_method_search_slowpath(rb_vm_t *vm, VALUE klass, unsigned int index, const struct rb_callinfo *ci)
{
struct rb_call_data cd = {
.ci = ci,
.cc = NULL
};
vm_search_method_slowpath0(vm->self, &cd, klass);
return vm->global_cc_cache_table[index] = cd.cc;
}
static void
scope_to_ci(call_type scope, ID mid, int argc, struct rb_callinfo *ci)
{
int flags = 0;
switch(scope) {
case CALL_PUBLIC:
break;
case CALL_FCALL:
flags |= VM_CALL_FCALL;
break;
case CALL_VCALL:
flags |= VM_CALL_VCALL;
break;
case CALL_PUBLIC_KW:
flags |= VM_CALL_KWARG;
break;
case CALL_FCALL_KW:
flags |= (VM_CALL_KWARG | VM_CALL_FCALL);
break;
}
*ci = VM_CI_ON_STACK(mid, flags, argc, NULL);
}
static inline const struct rb_callcache *
gccct_method_search(rb_execution_context_t *ec, VALUE recv, ID mid, const struct rb_callinfo *ci)
{
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, index, ci);
}
/**
* @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 `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;
}
struct rb_callinfo ci;
scope_to_ci(scope, mid, argc, &ci);
const struct rb_callcache *cc = gccct_method_search(ec, recv, mid, &ci);
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_refinements0(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();
}
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(rb_execution_context_t *ec, VALUE obj, ID id, int argc, const VALUE *argv, enum method_missing_reason call_status, int kw_splat)
{
VALUE *nargv, result, work, klass;
VALUE block_handler = vm_passed_block_handler(ec);
const rb_callable_method_entry_t *me;
ec->method_missing_reason = call_status;
if (id == idMethodMissing) {
goto 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;
missing:
raise_method_missing(ec, argc, argv, obj, call_status | MISSING_MISSING);
UNREACHABLE_RETURN(Qundef);
}
static inline VALUE
rb_funcallv_scope(VALUE recv, ID mid, int argc, const VALUE *argv, call_type scope)
{
rb_execution_context_t *ec = GET_EC();
struct rb_callinfo ci;
scope_to_ci(scope, mid, argc, &ci);
const struct rb_callcache *cc = gccct_method_search(ec, recv, mid, &ci);
VALUE self = ec->cfp->self;
if (LIKELY(cc) &&
LIKELY(rb_method_call_status(ec, vm_cc_cme(cc), scope, self) == MISSING_NONE)) {
// fastpath
return vm_call0_cc(ec, recv, mid, argc, argv, cc, false);
}
else {
return rb_call0(ec, recv, mid, argc, argv, scope, self);
}
}
#ifdef rb_funcallv
#undef rb_funcallv
#endif
VALUE
rb_funcallv(VALUE recv, ID mid, int argc, const VALUE *argv)
{
VM_ASSERT(ruby_thread_has_gvl_p());
return rb_funcallv_scope(recv, mid, argc, argv, CALL_FCALL);
}
VALUE
rb_funcallv_kw(VALUE recv, ID mid, int argc, const VALUE *argv, int kw_splat)
{
VM_ASSERT(ruby_thread_has_gvl_p());
return rb_call(recv, mid, argc, argv, kw_splat ? CALL_FCALL_KW : CALL_FCALL);
}
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(args), VALUE, argc);
return rb_funcallv(recv, mid, argc, argv);
}
#ifdef rb_funcall
#undef rb_funcall
#endif
VALUE
rb_funcall(VALUE recv, ID mid, int n, ...)
{
VALUE *argv;
va_list ar;
if (n > 0) {
long i;
va_start(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_funcallv(recv, mid, n, argv);
}
/**
* Calls a method only if it is the basic method of `ancestor`
* otherwise returns Qundef;
* @param recv receiver of the method
* @param mid an ID that represents the name of the method
* @param ancestor the Class that defined the basic method
* @param argc the number of arguments
* @param argv pointer to an array of method arguments
* @param kw_splat bool
*/
VALUE
rb_check_funcall_basic_kw(VALUE recv, ID mid, VALUE ancestor, int argc, const VALUE *argv, int kw_splat)
{
const rb_callable_method_entry_t *cme;
rb_execution_context_t *ec;
VALUE klass = CLASS_OF(recv);
if (!klass) return Qundef; /* hidden object */
cme = rb_callable_method_entry(klass, mid);
if (cme && METHOD_ENTRY_BASIC(cme) && RBASIC_CLASS(cme->defined_class) == ancestor) {
ec = GET_EC();
return rb_vm_call0(ec, recv, mid, argc, argv, cme, kw_splat);
}
return Qundef;
}
VALUE
rb_funcallv_public(VALUE recv, ID mid, int argc, const VALUE *argv)
{
return rb_funcallv_scope(recv, mid, argc, argv, CALL_PUBLIC);
}
VALUE
rb_funcallv_public_kw(VALUE recv, ID mid, int argc, const VALUE *argv, int kw_splat)
{
return rb_call(recv, mid, argc, argv, kw_splat ? CALL_PUBLIC_KW : CALL_PUBLIC);
}
VALUE
rb_funcall_passing_block(VALUE recv, ID mid, int argc, const VALUE *argv)
{
PASS_PASSED_BLOCK_HANDLER();
return rb_funcallv_public(recv, mid, argc, argv);
}
VALUE
rb_funcall_passing_block_kw(VALUE recv, ID mid, int argc, const VALUE *argv, int kw_splat)
{
PASS_PASSED_BLOCK_HANDLER();
return rb_call(recv, mid, argc, argv, kw_splat ? CALL_PUBLIC_KW : CALL_PUBLIC);
}
VALUE
rb_funcall_with_block(VALUE recv, ID mid, int argc, const VALUE *argv, VALUE passed_procval)
{
if (!NIL_P(passed_procval)) {
vm_passed_block_handler_set(GET_EC(), passed_procval);
}
return rb_funcallv_public(recv, mid, argc, argv);
}
VALUE
rb_funcall_with_block_kw(VALUE recv, ID mid, int argc, const VALUE *argv, VALUE passed_procval, int kw_splat)
{
if (!NIL_P(passed_procval)) {
vm_passed_block_handler_set(GET_EC(), passed_procval);
}
return rb_call(recv, mid, argc, argv, kw_splat ? CALL_PUBLIC_KW : CALL_PUBLIC);
}
static VALUE *
current_vm_stack_arg(const rb_execution_context_t *ec, const VALUE *argv)
{
rb_control_frame_t *prev_cfp = RUBY_VM_PREVIOUS_CONTROL_FRAME(ec->cfp);
if (RUBY_VM_CONTROL_FRAME_STACK_OVERFLOW_P(ec, prev_cfp)) return NULL;
if (prev_cfp->sp + 1 != argv) return NULL;
return prev_cfp->sp + 1;
}
static VALUE
send_internal(int argc, const VALUE *argv, VALUE recv, call_type scope)
{
ID id;
VALUE vid;
VALUE self;
VALUE ret, vargv = 0;
rb_execution_context_t *ec = GET_EC();
int public = scope == CALL_PUBLIC || scope == CALL_PUBLIC_KW;
if (public) {
self = Qundef;
}
else {
self = RUBY_VM_PREVIOUS_CONTROL_FRAME(ec->cfp)->self;
}
if (argc == 0) {
rb_raise(rb_eArgError, "no method name given");
}
vid = *argv;
id = rb_check_id(&vid);
if (!id) {
if (rb_method_basic_definition_p(CLASS_OF(recv), idMethodMissing)) {
VALUE exc = rb_make_no_method_exception(rb_eNoMethodError, 0,
recv, argc, argv,
!public);
rb_exc_raise(exc);
}
if (!SYMBOL_P(*argv)) {
VALUE *tmp_argv = current_vm_stack_arg(ec, argv);
vid = rb_str_intern(vid);
if (tmp_argv) {
tmp_argv[0] = vid;
}
else if (argc > 1) {
tmp_argv = ALLOCV_N(VALUE, vargv, argc);
tmp_argv[0] = vid;
MEMCPY(tmp_argv+1, argv+1, VALUE, argc-1);
argv = tmp_argv;
}
else {
argv = &vid;
}
}
id = idMethodMissing;
ec->method_missing_reason = MISSING_NOENTRY;
}
else {
argv++; argc--;
}
PASS_PASSED_BLOCK_HANDLER_EC(ec);
ret = rb_call0(ec, recv, id, argc, argv, scope, self);
ALLOCV_END(vargv);
return ret;
}
static VALUE
send_internal_kw(int argc, const VALUE *argv, VALUE recv, call_type scope)
{
if (rb_keyword_given_p()) {
switch (scope) {
case CALL_PUBLIC:
scope = CALL_PUBLIC_KW;
break;
case CALL_FCALL:
scope = CALL_FCALL_KW;
break;
default:
break;
}
}
return send_internal(argc, argv, recv, scope);
}
/*
* call-seq:
* foo.send(symbol [, args...]) -> obj
* foo.__send__(symbol [, args...]) -> obj
* foo.send(string [, args...]) -> obj
* foo.__send__(string [, args...]) -> obj
*
* Invokes the method identified by _symbol_, passing it any
* arguments specified.
* When the method is identified by a string, the string is converted
* to a symbol.
*
* BasicObject implements +__send__+, Kernel implements +send+.
* <code>__send__</code> is safer than +send+
* when _obj_ has the same method name like <code>Socket</code>.
* See also <code>public_send</code>.
*
* class Klass
* def hello(*args)
* "Hello " + args.join(' ')
* end
* end
* k = Klass.new
* k.send :hello, "gentle", "readers" #=> "Hello gentle readers"
*/
VALUE
rb_f_send(int argc, VALUE *argv, VALUE recv)
{
return send_internal_kw(argc, argv, recv, CALL_FCALL);
}
/*
* call-seq:
* obj.public_send(symbol [, args...]) -> obj
* obj.public_send(string [, args...]) -> obj
*
* Invokes the method identified by _symbol_, passing it any
* arguments specified. Unlike send, public_send calls public
* methods only.
* When the method is identified by a string, the string is converted
* to a symbol.
*
* 1.public_send(:puts, "hello") # causes NoMethodError
*/
static VALUE
rb_f_public_send(int argc, VALUE *argv, VALUE recv)
{
return send_internal_kw(argc, argv, recv, CALL_PUBLIC);
}
/* yield */
static inline VALUE
rb_yield_0_kw(int argc, const VALUE * argv, int kw_splat)
{
return vm_yield(GET_EC(), argc, argv, kw_splat);
}
static inline VALUE
rb_yield_0(int argc, const VALUE * argv)
{
return vm_yield(GET_EC(), argc, argv, RB_NO_KEYWORDS);
}
VALUE
rb_yield_1(VALUE val)
{
return rb_yield_0(1, &val);
}
VALUE
rb_yield(VALUE val)
{
if (UNDEF_P(val)) {
return rb_yield_0(0, NULL);
}
else {
return rb_yield_0(1, &val);
}
}
#undef rb_yield_values
VALUE
rb_yield_values(int n, ...)
{
if (n == 0) {
return rb_yield_0(0, 0);
}
else {
int i;
VALUE *argv;
va_list args;
argv = ALLOCA_N(VALUE, n);
va_start(args, n);
for (i=0; i<n; i++) {
argv[i] = va_arg(args, VALUE);
}
va_end(args);
return rb_yield_0(n, argv);
}
}
VALUE
rb_yield_values2(int argc, const VALUE *argv)
{
return rb_yield_0(argc, argv);
}
VALUE
rb_yield_values_kw(int argc, const VALUE *argv, int kw_splat)
{
return rb_yield_0_kw(argc, argv, kw_splat);
}
VALUE
rb_yield_splat(VALUE values)
{
VALUE tmp = rb_check_array_type(values);
VALUE v;
if (NIL_P(tmp)) {
rb_raise(rb_eArgError, "not an array");
}
v = rb_yield_0(RARRAY_LENINT(tmp), RARRAY_CONST_PTR(tmp));
RB_GC_GUARD(tmp);
return v;
}
VALUE
rb_yield_splat_kw(VALUE values, int kw_splat)
{
VALUE tmp = rb_check_array_type(values);
VALUE v;
if (NIL_P(tmp)) {
rb_raise(rb_eArgError, "not an array");
}
v = rb_yield_0_kw(RARRAY_LENINT(tmp), RARRAY_CONST_PTR(tmp), kw_splat);
RB_GC_GUARD(tmp);
return v;
}
VALUE
rb_yield_force_blockarg(VALUE values)
{
return vm_yield_force_blockarg(GET_EC(), values);
}
VALUE
rb_yield_block(RB_BLOCK_CALL_FUNC_ARGLIST(val, arg))
{
return vm_yield_with_block(GET_EC(), argc, argv,
NIL_P(blockarg) ? VM_BLOCK_HANDLER_NONE : blockarg,
rb_keyword_given_p());
}
#if VMDEBUG
static const char *
vm_frametype_name(const rb_control_frame_t *cfp);
#endif
static VALUE
rb_iterate0(VALUE (* it_proc) (VALUE), VALUE data1,
const struct vm_ifunc *const ifunc,
rb_execution_context_t *ec)
{
enum ruby_tag_type state;
volatile VALUE retval = Qnil;
rb_control_frame_t *const cfp = ec->cfp;
EC_PUSH_TAG(ec);
state = EC_EXEC_TAG();
if (state == 0) {
iter_retry:
{
VALUE block_handler;
if (ifunc) {
struct rb_captured_block *captured = VM_CFP_TO_CAPTURED_BLOCK(cfp);
captured->code.ifunc = ifunc;
block_handler = VM_BH_FROM_IFUNC_BLOCK(captured);
}
else {
block_handler = VM_CF_BLOCK_HANDLER(cfp);
}
vm_passed_block_handler_set(ec, block_handler);
}
retval = (*it_proc) (data1);
}
else if (state == TAG_BREAK || state == TAG_RETRY) {
const struct vm_throw_data *const err = (struct vm_throw_data *)ec->errinfo;
const rb_control_frame_t *const escape_cfp = THROW_DATA_CATCH_FRAME(err);
if (cfp == escape_cfp) {
rb_vm_rewind_cfp(ec, cfp);
state = 0;
ec->tag->state = TAG_NONE;
ec->errinfo = Qnil;
if (state == TAG_RETRY) goto iter_retry;
retval = THROW_DATA_VAL(err);
}
else if (0) {
SDR(); fprintf(stderr, "%p, %p\n", (void *)cfp, (void *)escape_cfp);
}
}
EC_POP_TAG();
if (state) {
EC_JUMP_TAG(ec, state);
}
return retval;
}
static VALUE
rb_iterate_internal(VALUE (* it_proc)(VALUE), VALUE data1,
rb_block_call_func_t bl_proc, VALUE data2)
{
return rb_iterate0(it_proc, data1,
bl_proc ? rb_vm_ifunc_proc_new(bl_proc, (void *)data2) : 0,
GET_EC());
}
VALUE
rb_iterate(VALUE (* it_proc)(VALUE), VALUE data1,
rb_block_call_func_t bl_proc, VALUE data2)
{
return rb_iterate_internal(it_proc, data1, bl_proc, data2);
}
struct iter_method_arg {
VALUE obj;
ID mid;
int argc;
const VALUE *argv;
int kw_splat;
};
static VALUE
iterate_method(VALUE obj)
{
const struct iter_method_arg * arg =
(struct iter_method_arg *) obj;
return rb_call(arg->obj, arg->mid, arg->argc, arg->argv, arg->kw_splat ? CALL_FCALL_KW : CALL_FCALL);
}
VALUE rb_block_call_kw(VALUE obj, ID mid, int argc, const VALUE * argv, rb_block_call_func_t bl_proc, VALUE data2, int kw_splat);
VALUE
rb_block_call(VALUE obj, ID mid, int argc, const VALUE * argv,
rb_block_call_func_t bl_proc, VALUE data2)
{
return rb_block_call_kw(obj, mid, argc, argv, bl_proc, data2, RB_NO_KEYWORDS);
}
VALUE
rb_block_call_kw(VALUE obj, ID mid, int argc, const VALUE * argv,
rb_block_call_func_t bl_proc, VALUE data2, int kw_splat)
{
struct iter_method_arg arg;
arg.obj = obj;
arg.mid = mid;
arg.argc = argc;
arg.argv = argv;
arg.kw_splat = kw_splat;
return rb_iterate_internal(iterate_method, (VALUE)&arg, bl_proc, data2);
}
VALUE
rb_lambda_call(VALUE obj, ID mid, int argc, const VALUE *argv,
rb_block_call_func_t bl_proc, int min_argc, int max_argc,
VALUE data2)
{
struct iter_method_arg arg;
struct vm_ifunc *block;
if (!bl_proc) rb_raise(rb_eArgError, "NULL lambda function");
arg.obj = obj;
arg.mid = mid;
arg.argc = argc;
arg.argv = argv;
arg.kw_splat = 0;
block = rb_vm_ifunc_new(bl_proc, (void *)data2, min_argc, max_argc);
return rb_iterate0(iterate_method, (VALUE)&arg, block, GET_EC());
}
static VALUE
iterate_check_method(VALUE obj)
{
const struct iter_method_arg * arg =
(struct iter_method_arg *) obj;
return rb_check_funcall(arg->obj, arg->mid, arg->argc, arg->argv);
}
VALUE
rb_check_block_call(VALUE obj, ID mid, int argc, const VALUE *argv,
rb_block_call_func_t bl_proc, VALUE data2)
{
struct iter_method_arg arg;
arg.obj = obj;
arg.mid = mid;
arg.argc = argc;
arg.argv = argv;
arg.kw_splat = 0;
return rb_iterate_internal(iterate_check_method, (VALUE)&arg, bl_proc, data2);
}
VALUE
rb_each(VALUE obj)
{
return rb_call(obj, idEach, 0, 0, CALL_FCALL);
}
static VALUE eval_default_path = Qfalse;
#define EVAL_LOCATION_MARK "eval at "
#define EVAL_LOCATION_MARK_LEN (int)rb_strlen_lit(EVAL_LOCATION_MARK)
static VALUE
get_eval_default_path(void)
{
int location_lineno;
VALUE location_path = rb_source_location(&location_lineno);
if (!NIL_P(location_path)) {
return rb_fstring(rb_sprintf("("EVAL_LOCATION_MARK"%"PRIsVALUE":%d)",
location_path, location_lineno));
}
if (!eval_default_path) {
eval_default_path = rb_fstring_lit("(eval)");
rb_vm_register_global_object(eval_default_path);
}
return eval_default_path;
}
static const rb_iseq_t *
pm_eval_make_iseq(VALUE src, VALUE fname, int line,
const struct rb_block *base_block)
{
const rb_iseq_t *const parent = vm_block_iseq(base_block);
const rb_iseq_t *iseq = parent;
VALUE name = rb_fstring_lit("<compiled>");
if (!fname) {
fname = rb_source_location(&line);
}
if (!UNDEF_P(fname)) {
if (!NIL_P(fname)) fname = rb_fstring(fname);
}
else {
fname = get_eval_default_path();
}
pm_parse_result_t result = { 0 };
pm_options_line_set(&result.options, line);
// Cout scopes, one for each parent iseq, plus one for our local scope
int scopes_count = 0;
do {
scopes_count++;
} while ((iseq = ISEQ_BODY(iseq)->parent_iseq) && (ISEQ_BODY(iseq)->type != ISEQ_TYPE_TOP));
pm_options_scopes_init(&result.options, scopes_count + 1);
// Walk over the scope tree, adding known locals at the correct depths. The
// scope array should be deepest -> shallowest. so lower indexes in the
// scopes array refer to root nodes on the tree, and higher indexes are the
// leaf nodes.
iseq = parent;
for (int scopes_index = 0; scopes_index < scopes_count; scopes_index++) {
int locals_count = ISEQ_BODY(iseq)->local_table_size;
pm_options_scope_t *options_scope = &result.options.scopes[scopes_count - scopes_index - 1];
pm_options_scope_init(options_scope, locals_count);
for (int local_index = 0; local_index < locals_count; local_index++) {
pm_string_t *scope_local = &options_scope->locals[local_index];
ID local = ISEQ_BODY(iseq)->local_table[local_index];
if (rb_is_local_id(local)) {
const char *name = rb_id2name(local);
size_t length = strlen(name);
// Explicitly skip numbered parameters. These should not be sent
// into the eval.
if (length == 2 && name[0] == '_' && name[1] >= '1' && name[1] <= '9') {
continue;
}
pm_string_constant_init(scope_local, name, strlen(name));
}
}
iseq = ISEQ_BODY(iseq)->parent_iseq;
}
// Add our empty local scope at the very end of the array for our eval
// scope's locals.
pm_options_scope_init(&result.options.scopes[scopes_count], 0);
VALUE error = pm_parse_string(&result, src, fname);
// If the parse failed, clean up and raise.
if (error != Qnil) {
pm_parse_result_free(&result);
rb_exc_raise(error);
}
// Create one scope node for each scope passed in, initialize the local
// lookup table with all the local variable information attached to the
// scope used by the parser.
pm_scope_node_t *node = &result.node;
iseq = parent;
for (int scopes_index = 0; scopes_index < scopes_count; scopes_index++) {
pm_scope_node_t *parent_scope = ruby_xcalloc(1, sizeof(pm_scope_node_t));
RUBY_ASSERT(parent_scope != NULL);
pm_options_scope_t *options_scope = &result.options.scopes[scopes_count - scopes_index - 1];
parent_scope->parser = &result.parser;
parent_scope->index_lookup_table = st_init_numtable();
int locals_count = ISEQ_BODY(iseq)->local_table_size;
parent_scope->local_table_for_iseq_size = locals_count;
pm_constant_id_list_init(&parent_scope->locals);
for (int local_index = 0; local_index < locals_count; local_index++) {
const pm_string_t *scope_local = &options_scope->locals[local_index];
pm_constant_id_t constant_id = 0;
if (pm_string_length(scope_local) > 0) {
constant_id = pm_constant_pool_insert_constant(
&result.parser.constant_pool, pm_string_source(scope_local),
pm_string_length(scope_local));
st_insert(parent_scope->index_lookup_table, (st_data_t)constant_id, (st_data_t)local_index);
}
pm_constant_id_list_append(&parent_scope->locals, constant_id);
}
node->previous = parent_scope;
node = parent_scope;
iseq = ISEQ_BODY(iseq)->parent_iseq;
}
iseq = pm_iseq_new_eval(&result.node, name, fname, Qnil, line, parent, 0);
pm_scope_node_t *prev = result.node.previous;
while (prev) {
pm_scope_node_t *next = prev->previous;
ruby_xfree(prev);
prev = next;
}
pm_parse_result_free(&result);
rb_exec_event_hook_script_compiled(GET_EC(), iseq, src);
return iseq;
}
static const rb_iseq_t *
eval_make_iseq(VALUE src, VALUE fname, int line,
const struct rb_block *base_block)
{
if (*rb_ruby_prism_ptr()) {
return pm_eval_make_iseq(src, fname, line, base_block);
}
const VALUE parser = rb_parser_new();
const rb_iseq_t *const parent = vm_block_iseq(base_block);
rb_iseq_t *iseq = NULL;
VALUE vast;
rb_ast_t *ast;
int isolated_depth = 0;
// Conditionally enable coverage depending on the current mode:
int coverage_enabled = (rb_get_coverage_mode() & COVERAGE_TARGET_EVAL) != 0;
{
int depth = 1;
const VALUE *ep = vm_block_ep(base_block);
while (1) {
if (VM_ENV_FLAGS(ep, VM_ENV_FLAG_ISOLATED)) {
isolated_depth = depth;
break;
}
else if (VM_ENV_LOCAL_P(ep)) {
break;
}
ep = VM_ENV_PREV_EP(ep);
depth++;
}
}
if (!fname) {
fname = rb_source_location(&line);
}
if (!UNDEF_P(fname)) {
if (!NIL_P(fname)) fname = rb_fstring(fname);
}
else {
fname = get_eval_default_path();
coverage_enabled = FALSE;
}
rb_parser_set_context(parser, parent, FALSE);
if (ruby_vm_keep_script_lines) rb_parser_set_script_lines(parser);
vast = rb_parser_compile_string_path(parser, fname, src, line);
ast = rb_ruby_ast_data_get(vast);
if (ast->body.root) {
ast->body.coverage_enabled = coverage_enabled;
iseq = rb_iseq_new_eval(vast,
ISEQ_BODY(parent)->location.label,
fname, Qnil, line,
parent, isolated_depth);
}
rb_ast_dispose(ast);
if (iseq != NULL) {
if (0 && iseq) { /* for debug */
VALUE disasm = rb_iseq_disasm(iseq);
printf("%s\n", StringValuePtr(disasm));
}
rb_exec_event_hook_script_compiled(GET_EC(), iseq, src);
}
return iseq;
}
static VALUE
eval_string_with_cref(VALUE self, VALUE src, rb_cref_t *cref, VALUE file, int line)
{
rb_execution_context_t *ec = GET_EC();
struct rb_block block;
const rb_iseq_t *iseq;
rb_control_frame_t *cfp = rb_vm_get_ruby_level_next_cfp(ec, ec->cfp);
if (!cfp) {
rb_raise(rb_eRuntimeError, "Can't eval on top of Fiber or Thread");
}
block.as.captured = *VM_CFP_TO_CAPTURED_BLOCK(cfp);
block.as.captured.self = self;
block.as.captured.code.iseq = cfp->iseq;
block.type = block_type_iseq;
iseq = eval_make_iseq(src, file, line, &block);
if (!iseq) {
rb_exc_raise(ec->errinfo);
}
/* TODO: what the code checking? */
if (!cref && block.as.captured.code.val) {
rb_cref_t *orig_cref = vm_get_cref(vm_block_ep(&block));
cref = vm_cref_dup(orig_cref);
}
vm_set_eval_stack(ec, iseq, cref, &block);
/* kick */
return vm_exec(ec);
}
static VALUE
eval_string_with_scope(VALUE scope, VALUE src, VALUE file, int line)
{
rb_execution_context_t *ec = GET_EC();
rb_binding_t *bind = Check_TypedStruct(scope, &ruby_binding_data_type);
const rb_iseq_t *iseq = eval_make_iseq(src, file, line, &bind->block);
if (!iseq) {
rb_exc_raise(ec->errinfo);
}
vm_set_eval_stack(ec, iseq, NULL, &bind->block);
/* save new env */
if (ISEQ_BODY(iseq)->local_table_size > 0) {
vm_bind_update_env(scope, bind, vm_make_env_object(ec, ec->cfp));
}
/* kick */
return vm_exec(ec);
}
/*
* call-seq:
* eval(string [, binding [, filename [,lineno]]]) -> obj
*
* Evaluates the Ruby expression(s) in <em>string</em>. If
* <em>binding</em> is given, which must be a Binding object, the
* evaluation is performed in its context. If the optional
* <em>filename</em> and <em>lineno</em> parameters are present, they
* will be used when reporting syntax errors.
*
* def get_binding(str)
* return binding
* end
* str = "hello"
* eval "str + ' Fred'" #=> "hello Fred"
* eval "str + ' Fred'", get_binding("bye") #=> "bye Fred"
*/
VALUE
rb_f_eval(int argc, const VALUE *argv, VALUE self)
{
VALUE src, scope, vfile, vline;
VALUE file = Qundef;
int line = 1;
rb_scan_args(argc, argv, "13", &src, &scope, &vfile, &vline);
StringValue(src);
if (argc >= 3) {
StringValue(vfile);
}
if (argc >= 4) {
line = NUM2INT(vline);
}
if (!NIL_P(vfile))
file = vfile;
if (NIL_P(scope))
return eval_string_with_cref(self, src, NULL, file, line);
else
return eval_string_with_scope(scope, src, file, line);
}
/** @note This function name is not stable. */
VALUE
ruby_eval_string_from_file(const char *str, const char *filename)
{
VALUE file = filename ? rb_str_new_cstr(filename) : 0;
rb_execution_context_t *ec = GET_EC();
rb_control_frame_t *cfp = ec ? rb_vm_get_ruby_level_next_cfp(ec, ec->cfp) : NULL;
VALUE self = cfp ? cfp->self : rb_vm_top_self();
return eval_string_with_cref(self, rb_str_new2(str), NULL, file, 1);
}
VALUE
rb_eval_string(const char *str)
{
return ruby_eval_string_from_file(str, "eval");
}
static VALUE
eval_string_protect(VALUE str)
{
return rb_eval_string((char *)str);
}
VALUE
rb_eval_string_protect(const char *str, int *pstate)
{
return rb_protect(eval_string_protect, (VALUE)str, pstate);
}
struct eval_string_wrap_arg {
VALUE top_self;
VALUE klass;
const char *str;
};
static VALUE
eval_string_wrap_protect(VALUE data)
{
const struct eval_string_wrap_arg *const arg = (struct eval_string_wrap_arg*)data;
rb_cref_t *cref = rb_vm_cref_new_toplevel();
cref->klass_or_self = arg->klass;
return eval_string_with_cref(arg->top_self, rb_str_new_cstr(arg->str), cref, rb_str_new_cstr("eval"), 1);
}
VALUE
rb_eval_string_wrap(const char *str, int *pstate)
{
int state;
rb_thread_t *th = GET_THREAD();
VALUE self = th->top_self;
VALUE wrapper = th->top_wrapper;
VALUE val;
struct eval_string_wrap_arg data;
th->top_wrapper = rb_module_new();
th->top_self = rb_obj_clone(rb_vm_top_self());
rb_extend_object(th->top_self, th->top_wrapper);
data.top_self = th->top_self;
data.klass = th->top_wrapper;
data.str = str;
val = rb_protect(eval_string_wrap_protect, (VALUE)&data, &state);
th->top_self = self;
th->top_wrapper = wrapper;
if (pstate) {
*pstate = state;
}
else if (state != TAG_NONE) {
EC_JUMP_TAG(th->ec, state);
}
return val;
}
VALUE
rb_eval_cmd_kw(VALUE cmd, VALUE arg, int kw_splat)
{
enum ruby_tag_type state;
volatile VALUE val = Qnil; /* OK */
rb_execution_context_t * volatile ec = GET_EC();
EC_PUSH_TAG(ec);
if ((state = EC_EXEC_TAG()) == TAG_NONE) {
if (!RB_TYPE_P(cmd, T_STRING)) {
val = rb_funcallv_kw(cmd, idCall, RARRAY_LENINT(arg),
RARRAY_CONST_PTR(arg), kw_splat);
}
else {
val = eval_string_with_cref(rb_vm_top_self(), cmd, NULL, 0, 0);
}
}
EC_POP_TAG();
if (state) EC_JUMP_TAG(ec, state);
return val;
}
/* block eval under the class/module context */
static VALUE
yield_under(VALUE self, int singleton, int argc, const VALUE *argv, int kw_splat)
{
rb_execution_context_t *ec = GET_EC();
rb_control_frame_t *cfp = ec->cfp;
VALUE block_handler = VM_CF_BLOCK_HANDLER(cfp);
VALUE new_block_handler = 0;
const struct rb_captured_block *captured = NULL;
struct rb_captured_block new_captured;
const VALUE *ep = NULL;
rb_cref_t *cref;
int is_lambda = FALSE;
if (block_handler != VM_BLOCK_HANDLER_NONE) {
again:
switch (vm_block_handler_type(block_handler)) {
case block_handler_type_iseq:
captured = VM_BH_TO_CAPT_BLOCK(block_handler);
new_captured = *captured;
new_block_handler = VM_BH_FROM_ISEQ_BLOCK(&new_captured);
break;
case block_handler_type_ifunc:
captured = VM_BH_TO_CAPT_BLOCK(block_handler);
new_captured = *captured;
new_block_handler = VM_BH_FROM_IFUNC_BLOCK(&new_captured);
break;
case block_handler_type_proc:
is_lambda = rb_proc_lambda_p(block_handler) != Qfalse;
block_handler = vm_proc_to_block_handler(VM_BH_TO_PROC(block_handler));
goto again;
case block_handler_type_symbol:
return rb_sym_proc_call(SYM2ID(VM_BH_TO_SYMBOL(block_handler)),
argc, argv, kw_splat,
VM_BLOCK_HANDLER_NONE);
}
new_captured.self = self;
ep = captured->ep;
VM_FORCE_WRITE_SPECIAL_CONST(&VM_CF_LEP(ec->cfp)[VM_ENV_DATA_INDEX_SPECVAL], new_block_handler);
}
VM_ASSERT(singleton || RB_TYPE_P(self, T_MODULE) || RB_TYPE_P(self, T_CLASS));
cref = vm_cref_push(ec, self, ep, TRUE, singleton);
return vm_yield_with_cref(ec, argc, argv, kw_splat, cref, is_lambda);
}
VALUE
rb_yield_refine_block(VALUE refinement, VALUE refinements)
{
rb_execution_context_t *ec = GET_EC();
VALUE block_handler = VM_CF_BLOCK_HANDLER(ec->cfp);
if (vm_block_handler_type(block_handler) != block_handler_type_iseq) {
rb_bug("rb_yield_refine_block: an iseq block is required");
}
else {
const struct rb_captured_block *captured = VM_BH_TO_ISEQ_BLOCK(block_handler);
struct rb_captured_block new_captured = *captured;
const VALUE *const argv = &new_captured.self; /* dummy to suppress nonnull warning from gcc */
VALUE new_block_handler = VM_BH_FROM_ISEQ_BLOCK(&new_captured);
const VALUE *ep = captured->ep;
rb_cref_t *cref = vm_cref_push(ec, refinement, ep, TRUE, FALSE);
CREF_REFINEMENTS_SET(cref, refinements);
VM_FORCE_WRITE_SPECIAL_CONST(&VM_CF_LEP(ec->cfp)[VM_ENV_DATA_INDEX_SPECVAL], new_block_handler);
new_captured.self = refinement;
return vm_yield_with_cref(ec, 0, argv, RB_NO_KEYWORDS, cref, FALSE);
}
}
/* string eval under the class/module context */
static VALUE
eval_under(VALUE self, int singleton, VALUE src, VALUE file, int line)
{
rb_cref_t *cref = vm_cref_push(GET_EC(), self, NULL, FALSE, singleton);
StringValue(src);
return eval_string_with_cref(self, src, cref, file, line);
}
static VALUE
specific_eval(int argc, const VALUE *argv, VALUE self, int singleton, int kw_splat)
{
if (rb_block_given_p()) {
rb_check_arity(argc, 0, 0);
return yield_under(self, singleton, 1, &self, kw_splat);
}
else {
VALUE file = Qnil;
int line = 1;
VALUE code;
rb_check_arity(argc, 1, 3);
code = argv[0];
StringValue(code);
if (argc > 2)
line = NUM2INT(argv[2]);
if (argc > 1) {
file = argv[1];
if (!NIL_P(file)) StringValue(file);
}
if (NIL_P(file)) {
file = get_eval_default_path();
}
return eval_under(self, singleton, code, file, line);
}
}
/*
* call-seq:
* obj.instance_eval(string [, filename [, lineno]] ) -> obj
* obj.instance_eval {|obj| block } -> obj
*
* Evaluates a string containing Ruby source code, or the given block,
* within the context of the receiver (_obj_). In order to set the
* context, the variable +self+ is set to _obj_ while
* the code is executing, giving the code access to _obj_'s
* instance variables and private methods.
*
* When <code>instance_eval</code> is given a block, _obj_ is also
* passed in as the block's only argument.
*
* When <code>instance_eval</code> is given a +String+, the optional
* second and third parameters supply a filename and starting line number
* that are used when reporting compilation errors.
*
* class KlassWithSecret
* def initialize
* @secret = 99
* end
* private
* def the_secret
* "Ssssh! The secret is #{@secret}."
* end
* end
* k = KlassWithSecret.new
* k.instance_eval { @secret } #=> 99
* k.instance_eval { the_secret } #=> "Ssssh! The secret is 99."
* k.instance_eval {|obj| obj == self } #=> true
*/
static VALUE
rb_obj_instance_eval_internal(int argc, const VALUE *argv, VALUE self)
{
return specific_eval(argc, argv, self, TRUE, RB_PASS_CALLED_KEYWORDS);
}
VALUE
rb_obj_instance_eval(int argc, const VALUE *argv, VALUE self)
{
return specific_eval(argc, argv, self, TRUE, RB_NO_KEYWORDS);
}
/*
* call-seq:
* obj.instance_exec(arg...) {|var...| block } -> obj
*
* Executes the given block within the context of the receiver
* (_obj_). In order to set the context, the variable +self+ is set
* to _obj_ while the code is executing, giving the code access to
* _obj_'s instance variables. Arguments are passed as block parameters.
*
* class KlassWithSecret
* def initialize
* @secret = 99
* end
* end
* k = KlassWithSecret.new
* k.instance_exec(5) {|x| @secret+x } #=> 104
*/
static VALUE
rb_obj_instance_exec_internal(int argc, const VALUE *argv, VALUE self)
{
return yield_under(self, TRUE, argc, argv, RB_PASS_CALLED_KEYWORDS);
}
VALUE
rb_obj_instance_exec(int argc, const VALUE *argv, VALUE self)
{
return yield_under(self, TRUE, argc, argv, RB_NO_KEYWORDS);
}
/*
* call-seq:
* mod.class_eval(string [, filename [, lineno]]) -> obj
* mod.class_eval {|mod| block } -> obj
* mod.module_eval(string [, filename [, lineno]]) -> obj
* mod.module_eval {|mod| block } -> obj
*
* Evaluates the string or block in the context of _mod_, except that when
* a block is given, constant/class variable lookup is not affected. This
* can be used to add methods to a class. <code>module_eval</code> returns
* the result of evaluating its argument. The optional _filename_ and
* _lineno_ parameters set the text for error messages.
*
* class Thing
* end
* a = %q{def hello() "Hello there!" end}
* Thing.module_eval(a)
* puts Thing.new.hello()
* Thing.module_eval("invalid code", "dummy", 123)
*
* <em>produces:</em>
*
* Hello there!
* dummy:123:in `module_eval': undefined local variable
* or method `code' for Thing:Class
*/
static VALUE
rb_mod_module_eval_internal(int argc, const VALUE *argv, VALUE mod)
{
return specific_eval(argc, argv, mod, FALSE, RB_PASS_CALLED_KEYWORDS);
}
VALUE
rb_mod_module_eval(int argc, const VALUE *argv, VALUE mod)
{
return specific_eval(argc, argv, mod, FALSE, RB_NO_KEYWORDS);
}
/*
* call-seq:
* mod.module_exec(arg...) {|var...| block } -> obj
* mod.class_exec(arg...) {|var...| block } -> obj
*
* Evaluates the given block in the context of the class/module.
* The method defined in the block will belong to the receiver.
* Any arguments passed to the method will be passed to the block.
* This can be used if the block needs to access instance variables.
*
* class Thing
* end
* Thing.class_exec{
* def hello() "Hello there!" end
* }
* puts Thing.new.hello()
*
* <em>produces:</em>
*
* Hello there!
*/
static VALUE
rb_mod_module_exec_internal(int argc, const VALUE *argv, VALUE mod)
{
return yield_under(mod, FALSE, argc, argv, RB_PASS_CALLED_KEYWORDS);
}
VALUE
rb_mod_module_exec(int argc, const VALUE *argv, VALUE mod)
{
return yield_under(mod, FALSE, argc, argv, RB_NO_KEYWORDS);
}
/*
* Document-class: UncaughtThrowError
*
* Raised when +throw+ is called with a _tag_ which does not have
* corresponding +catch+ block.
*
* throw "foo", "bar"
*
* <em>raises the exception:</em>
*
* UncaughtThrowError: uncaught throw "foo"
*/
static VALUE
uncaught_throw_init(int argc, const VALUE *argv, VALUE exc)
{
rb_check_arity(argc, 2, UNLIMITED_ARGUMENTS);
rb_call_super(argc - 2, argv + 2);
rb_ivar_set(exc, id_tag, argv[0]);
rb_ivar_set(exc, id_value, argv[1]);
return exc;
}
/*
* call-seq:
* uncaught_throw.tag -> obj
*
* Return the tag object which was called for.
*/
static VALUE
uncaught_throw_tag(VALUE exc)
{
return rb_ivar_get(exc, id_tag);
}
/*
* call-seq:
* uncaught_throw.value -> obj
*
* Return the return value which was called for.
*/
static VALUE
uncaught_throw_value(VALUE exc)
{
return rb_ivar_get(exc, id_value);
}
/*
* call-seq:
* uncaught_throw.to_s -> string
*
* Returns formatted message with the inspected tag.
*/
static VALUE
uncaught_throw_to_s(VALUE exc)
{
VALUE mesg = rb_attr_get(exc, id_mesg);
VALUE tag = uncaught_throw_tag(exc);
return rb_str_format(1, &tag, mesg);
}
/*
* call-seq:
* throw(tag [, obj])
*
* Transfers control to the end of the active +catch+ block
* waiting for _tag_. Raises +UncaughtThrowError+ if there
* is no +catch+ block for the _tag_. The optional second
* parameter supplies a return value for the +catch+ block,
* which otherwise defaults to +nil+. For examples, see
* Kernel::catch.
*/
static VALUE
rb_f_throw(int argc, VALUE *argv, VALUE _)
{
VALUE tag, value;
rb_scan_args(argc, argv, "11", &tag, &value);
rb_throw_obj(tag, value);
UNREACHABLE_RETURN(Qnil);
}
void
rb_throw_obj(VALUE tag, VALUE value)
{
rb_execution_context_t *ec = GET_EC();
struct rb_vm_tag *tt = ec->tag;
while (tt) {
if (tt->tag == tag) {
tt->retval = value;
break;
}
tt = tt->prev;
}
if (!tt) {
VALUE desc[3];
desc[0] = tag;
desc[1] = value;
desc[2] = rb_str_new_cstr("uncaught throw %p");
rb_exc_raise(rb_class_new_instance(numberof(desc), desc, rb_eUncaughtThrow));
}
ec->errinfo = (VALUE)THROW_DATA_NEW(tag, NULL, TAG_THROW);
EC_JUMP_TAG(ec, TAG_THROW);
}
void
rb_throw(const char *tag, VALUE val)
{
rb_throw_obj(rb_sym_intern_ascii_cstr(tag), val);
}
static VALUE
catch_i(RB_BLOCK_CALL_FUNC_ARGLIST(tag, _))
{
return rb_yield_0(1, &tag);
}
/*
* call-seq:
* catch([tag]) {|tag| block } -> obj
*
* +catch+ executes its block. If +throw+ is not called, the block executes
* normally, and +catch+ returns the value of the last expression evaluated.
*
* catch(1) { 123 } # => 123
*
* If <code>throw(tag2, val)</code> is called, Ruby searches up its stack for
* a +catch+ block whose +tag+ has the same +object_id+ as _tag2_. When found,
* the block stops executing and returns _val_ (or +nil+ if no second argument
* was given to +throw+).
*
* catch(1) { throw(1, 456) } # => 456
* catch(1) { throw(1) } # => nil
*
* When +tag+ is passed as the first argument, +catch+ yields it as the
* parameter of the block.
*
* catch(1) {|x| x + 2 } # => 3
*
* When no +tag+ is given, +catch+ yields a new unique object (as from
* +Object.new+) as the block parameter. This object can then be used as the
* argument to +throw+, and will match the correct +catch+ block.
*
* catch do |obj_A|
* catch do |obj_B|
* throw(obj_B, 123)
* puts "This puts is not reached"
* end
*
* puts "This puts is displayed"
* 456
* end
*
* # => 456
*
* catch do |obj_A|
* catch do |obj_B|
* throw(obj_A, 123)
* puts "This puts is still not reached"
* end
*
* puts "Now this puts is also not reached"
* 456
* end
*
* # => 123
*/
static VALUE
rb_f_catch(int argc, VALUE *argv, VALUE self)
{
VALUE tag = rb_check_arity(argc, 0, 1) ? argv[0] : rb_obj_alloc(rb_cObject);
return rb_catch_obj(tag, catch_i, 0);
}
VALUE
rb_catch(const char *tag, rb_block_call_func_t func, VALUE data)
{
VALUE vtag = tag ? rb_sym_intern_ascii_cstr(tag) : rb_obj_alloc(rb_cObject);
return rb_catch_obj(vtag, func, data);
}
static VALUE
vm_catch_protect(VALUE tag, rb_block_call_func *func, VALUE data,
enum ruby_tag_type *stateptr, rb_execution_context_t *volatile ec)
{
enum ruby_tag_type state;
VALUE val = Qnil; /* OK */
rb_control_frame_t *volatile saved_cfp = ec->cfp;
EC_PUSH_TAG(ec);
_tag.tag = tag;
if ((state = EC_EXEC_TAG()) == TAG_NONE) {
/* call with argc=1, argv = [tag], block = Qnil to insure compatibility */
val = (*func)(tag, data, 1, (const VALUE *)&tag, Qnil);
}
else if (state == TAG_THROW && THROW_DATA_VAL((struct vm_throw_data *)ec->errinfo) == tag) {
rb_vm_rewind_cfp(ec, saved_cfp);
val = ec->tag->retval;
ec->errinfo = Qnil;
state = 0;
}
EC_POP_TAG();
if (stateptr)
*stateptr = state;
return val;
}
VALUE
rb_catch_protect(VALUE t, rb_block_call_func *func, VALUE data, enum ruby_tag_type *stateptr)
{
return vm_catch_protect(t, func, data, stateptr, GET_EC());
}
VALUE
rb_catch_obj(VALUE t, rb_block_call_func_t func, VALUE data)
{
enum ruby_tag_type state;
rb_execution_context_t *ec = GET_EC();
VALUE val = vm_catch_protect(t, (rb_block_call_func *)func, data, &state, ec);
if (state) EC_JUMP_TAG(ec, state);
return val;
}
static void
local_var_list_init(struct local_var_list *vars)
{
vars->tbl = rb_ident_hash_new();
RBASIC_CLEAR_CLASS(vars->tbl);
}
static VALUE
local_var_list_finish(struct local_var_list *vars)
{
/* TODO: not to depend on the order of st_table */
VALUE ary = rb_hash_keys(vars->tbl);
rb_hash_clear(vars->tbl);
vars->tbl = 0;
return ary;
}
static int
local_var_list_update(st_data_t *key, st_data_t *value, st_data_t arg, int existing)
{
if (existing) return ST_STOP;
*value = (st_data_t)Qtrue; /* INT2FIX(arg) */
return ST_CONTINUE;
}
static void
local_var_list_add(const struct local_var_list *vars, ID lid)
{
if (lid && rb_is_local_id(lid)) {
/* should skip temporary variable */
st_data_t idx = 0; /* tbl->num_entries */
rb_hash_stlike_update(vars->tbl, ID2SYM(lid), local_var_list_update, idx);
}
}
/*
* call-seq:
* local_variables -> array
*
* Returns the names of the current local variables.
*
* fred = 1
* for i in 1..10
* # ...
* end
* local_variables #=> [:fred, :i]
*/
static VALUE
rb_f_local_variables(VALUE _)
{
struct local_var_list vars;
rb_execution_context_t *ec = GET_EC();
rb_control_frame_t *cfp = vm_get_ruby_level_caller_cfp(ec, RUBY_VM_PREVIOUS_CONTROL_FRAME(ec->cfp));
unsigned int i;
local_var_list_init(&vars);
while (cfp) {
if (cfp->iseq) {
for (i = 0; i < ISEQ_BODY(cfp->iseq)->local_table_size; i++) {
local_var_list_add(&vars, ISEQ_BODY(cfp->iseq)->local_table[i]);
}
}
if (!VM_ENV_LOCAL_P(cfp->ep)) {
/* block */
const VALUE *ep = VM_CF_PREV_EP(cfp);
if (vm_collect_local_variables_in_heap(ep, &vars)) {
break;
}
else {
while (cfp->ep != ep) {
cfp = RUBY_VM_PREVIOUS_CONTROL_FRAME(cfp);
}
}
}
else {
break;
}
}
return local_var_list_finish(&vars);
}
/*
* call-seq:
* block_given? -> true or false
*
* Returns <code>true</code> if <code>yield</code> would execute a
* block in the current context. The <code>iterator?</code> form
* is mildly deprecated.
*
* def try
* if block_given?
* yield
* else
* "no block"
* end
* end
* try #=> "no block"
* try { "hello" } #=> "hello"
* try do "hello" end #=> "hello"
*/
static VALUE
rb_f_block_given_p(VALUE _)
{
rb_execution_context_t *ec = GET_EC();
rb_control_frame_t *cfp = ec->cfp;
cfp = vm_get_ruby_level_caller_cfp(ec, RUBY_VM_PREVIOUS_CONTROL_FRAME(cfp));
return RBOOL(cfp != NULL && VM_CF_BLOCK_HANDLER(cfp) != VM_BLOCK_HANDLER_NONE);
}
/*
* call-seq:
* iterator? -> true or false
*
* Deprecated. Use block_given? instead.
*/
static VALUE
rb_f_iterator_p(VALUE self)
{
rb_warn_deprecated("iterator?", "block_given?");
return rb_f_block_given_p(self);
}
VALUE
rb_current_realfilepath(void)
{
const rb_execution_context_t *ec = GET_EC();
rb_control_frame_t *cfp = ec->cfp;
cfp = vm_get_ruby_level_caller_cfp(ec, RUBY_VM_PREVIOUS_CONTROL_FRAME(cfp));
if (cfp != NULL) {
VALUE path = rb_iseq_realpath(cfp->iseq);
if (RTEST(path)) return path;
// eval context
path = rb_iseq_path(cfp->iseq);
if (path == eval_default_path) {
return Qnil;
}
// [Feature #19755] implicit eval location is "(eval at #{__FILE__}:#{__LINE__})"
const long len = RSTRING_LEN(path);
if (len > EVAL_LOCATION_MARK_LEN+1) {
const char *const ptr = RSTRING_PTR(path);
if (ptr[len - 1] == ')' &&
memcmp(ptr, "("EVAL_LOCATION_MARK, EVAL_LOCATION_MARK_LEN+1) == 0) {
return Qnil;
}
}
return path;
}
return Qnil;
}
void
Init_vm_eval(void)
{
rb_define_global_function("eval", rb_f_eval, -1);
rb_define_global_function("local_variables", rb_f_local_variables, 0);
rb_define_global_function("iterator?", rb_f_iterator_p, 0);
rb_define_global_function("block_given?", rb_f_block_given_p, 0);
rb_define_global_function("catch", rb_f_catch, -1);
rb_define_global_function("throw", rb_f_throw, -1);
rb_define_method(rb_cBasicObject, "instance_eval", rb_obj_instance_eval_internal, -1);
rb_define_method(rb_cBasicObject, "instance_exec", rb_obj_instance_exec_internal, -1);
rb_define_private_method(rb_cBasicObject, "method_missing", rb_method_missing, -1);
#if 1
rb_add_method(rb_cBasicObject, id__send__,
VM_METHOD_TYPE_OPTIMIZED, (void *)OPTIMIZED_METHOD_TYPE_SEND, METHOD_VISI_PUBLIC);
rb_add_method(rb_mKernel, idSend,
VM_METHOD_TYPE_OPTIMIZED, (void *)OPTIMIZED_METHOD_TYPE_SEND, METHOD_VISI_PUBLIC);
#else
rb_define_method(rb_cBasicObject, "__send__", rb_f_send, -1);
rb_define_method(rb_mKernel, "send", rb_f_send, -1);
#endif
rb_define_method(rb_mKernel, "public_send", rb_f_public_send, -1);
rb_define_method(rb_cModule, "module_exec", rb_mod_module_exec_internal, -1);
rb_define_method(rb_cModule, "class_exec", rb_mod_module_exec_internal, -1);
rb_define_method(rb_cModule, "module_eval", rb_mod_module_eval_internal, -1);
rb_define_method(rb_cModule, "class_eval", rb_mod_module_eval_internal, -1);
rb_eUncaughtThrow = rb_define_class("UncaughtThrowError", rb_eArgError);
rb_define_method(rb_eUncaughtThrow, "initialize", uncaught_throw_init, -1);
rb_define_method(rb_eUncaughtThrow, "tag", uncaught_throw_tag, 0);
rb_define_method(rb_eUncaughtThrow, "value", uncaught_throw_value, 0);
rb_define_method(rb_eUncaughtThrow, "to_s", uncaught_throw_to_s, 0);
id_result = rb_intern_const("result");
id_tag = rb_intern_const("tag");
id_value = rb_intern_const("value");
}
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