Ruby  2.0.0p353(2013-11-22revision43784)
vm_insnhelper.c
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00001 /**********************************************************************
00002 
00003   vm_insnhelper.c - instruction helper functions.
00004 
00005   $Author: nagachika $
00006 
00007   Copyright (C) 2007 Koichi Sasada
00008 
00009 **********************************************************************/
00010 
00011 /* finish iseq array */
00012 #include "insns.inc"
00013 #include <math.h>
00014 #include "constant.h"
00015 #include "internal.h"
00016 #include "probes.h"
00017 #include "probes_helper.h"
00018 
00019 /* control stack frame */
00020 
00021 #ifndef INLINE
00022 #define INLINE inline
00023 #endif
00024 
00025 static rb_control_frame_t *vm_get_ruby_level_caller_cfp(rb_thread_t *th, rb_control_frame_t *cfp);
00026 
00027 static void
00028 vm_stackoverflow(void)
00029 {
00030     rb_exc_raise(sysstack_error);
00031 }
00032 
00033 static inline rb_control_frame_t *
00034 vm_push_frame(rb_thread_t *th,
00035               const rb_iseq_t *iseq,
00036               VALUE type,
00037               VALUE self,
00038               VALUE klass,
00039               VALUE specval,
00040               const VALUE *pc,
00041               VALUE *sp,
00042               int local_size,
00043               const rb_method_entry_t *me)
00044 {
00045     rb_control_frame_t *const cfp = th->cfp - 1;
00046     int i;
00047 
00048     /* check stack overflow */
00049     if ((void *)(sp + local_size) >= (void *)cfp) {
00050         vm_stackoverflow();
00051     }
00052     th->cfp = cfp;
00053 
00054     /* setup vm value stack */
00055 
00056     /* initialize local variables */
00057     for (i=0; i < local_size; i++) {
00058         *sp++ = Qnil;
00059     }
00060 
00061     /* set special val */
00062     *sp = specval;
00063 
00064     /* setup vm control frame stack */
00065 
00066     cfp->pc = (VALUE *)pc;
00067     cfp->sp = sp + 1;
00068 #if VM_DEBUG_BP_CHECK
00069     cfp->bp_check = sp + 1;
00070 #endif
00071     cfp->ep = sp;
00072     cfp->iseq = (rb_iseq_t *) iseq;
00073     cfp->flag = type;
00074     cfp->self = self;
00075     cfp->block_iseq = 0;
00076     cfp->proc = 0;
00077     cfp->me = me;
00078     if (klass) {
00079         cfp->klass = klass;
00080     }
00081     else {
00082         rb_control_frame_t *prev_cfp = RUBY_VM_PREVIOUS_CONTROL_FRAME(cfp);
00083         if (RUBY_VM_CONTROL_FRAME_STACK_OVERFLOW_P(th, prev_cfp)) {
00084             cfp->klass = Qnil;
00085         }
00086         else {
00087             cfp->klass = prev_cfp->klass;
00088         }
00089     }
00090 
00091     if (VMDEBUG == 2) {
00092         SDR();
00093     }
00094 
00095     return cfp;
00096 }
00097 
00098 static inline void
00099 vm_pop_frame(rb_thread_t *th)
00100 {
00101     th->cfp = RUBY_VM_PREVIOUS_CONTROL_FRAME(th->cfp);
00102 
00103     if (VMDEBUG == 2) {
00104         SDR();
00105     }
00106 }
00107 
00108 /* method dispatch */
00109 static inline VALUE
00110 rb_arg_error_new(int argc, int min, int max)
00111 {
00112     VALUE err_mess = 0;
00113     if (min == max) {
00114         err_mess = rb_sprintf("wrong number of arguments (%d for %d)", argc, min);
00115     }
00116     else if (max == UNLIMITED_ARGUMENTS) {
00117         err_mess = rb_sprintf("wrong number of arguments (%d for %d+)", argc, min);
00118     }
00119     else {
00120         err_mess = rb_sprintf("wrong number of arguments (%d for %d..%d)", argc, min, max);
00121     }
00122     return rb_exc_new3(rb_eArgError, err_mess);
00123 }
00124 
00125 NORETURN(static void argument_error(const rb_iseq_t *iseq, int miss_argc, int min_argc, int max_argc));
00126 static void
00127 argument_error(const rb_iseq_t *iseq, int miss_argc, int min_argc, int max_argc)
00128 {
00129     VALUE exc = rb_arg_error_new(miss_argc, min_argc, max_argc);
00130     VALUE bt = rb_make_backtrace();
00131     VALUE err_line = 0;
00132 
00133     if (iseq) {
00134         int line_no = rb_iseq_first_lineno(iseq);
00135 
00136         err_line = rb_sprintf("%s:%d:in `%s'",
00137                               RSTRING_PTR(iseq->location.path),
00138                               line_no, RSTRING_PTR(iseq->location.label));
00139         rb_funcall(bt, rb_intern("unshift"), 1, err_line);
00140     }
00141 
00142     rb_funcall(exc, rb_intern("set_backtrace"), 1, bt);
00143     rb_exc_raise(exc);
00144 }
00145 
00146 NORETURN(static void unknown_keyword_error(const rb_iseq_t *iseq, VALUE hash));
00147 static void
00148 unknown_keyword_error(const rb_iseq_t *iseq, VALUE hash)
00149 {
00150     VALUE sep = rb_usascii_str_new2(", "), keys;
00151     const char *msg;
00152     int i;
00153     for (i = 0; i < iseq->arg_keywords; i++) {
00154         rb_hash_delete(hash, ID2SYM(iseq->arg_keyword_table[i]));
00155     }
00156     keys = rb_funcall(hash, rb_intern("keys"), 0, 0);
00157     if (!RB_TYPE_P(keys, T_ARRAY)) rb_raise(rb_eArgError, "unknown keyword");
00158     msg = RARRAY_LEN(keys) == 1 ? "" : "s";
00159     keys = rb_funcall(keys, rb_intern("join"), 1, sep);
00160     rb_raise(rb_eArgError, "unknown keyword%s: %"PRIsVALUE, msg, keys);
00161 }
00162 
00163 void
00164 rb_error_arity(int argc, int min, int max)
00165 {
00166     rb_exc_raise(rb_arg_error_new(argc, min, max));
00167 }
00168 
00169 /* svar */
00170 
00171 static inline NODE *
00172 lep_svar_place(rb_thread_t *th, VALUE *lep)
00173 {
00174     VALUE *svar;
00175 
00176     if (lep && th->root_lep != lep) {
00177         svar = &lep[-1];
00178     }
00179     else {
00180         svar = &th->root_svar;
00181     }
00182     if (NIL_P(*svar)) {
00183         *svar = (VALUE)NEW_IF(Qnil, Qnil, Qnil);
00184     }
00185     return (NODE *)*svar;
00186 }
00187 
00188 static VALUE
00189 lep_svar_get(rb_thread_t *th, VALUE *lep, rb_num_t key)
00190 {
00191     NODE *svar = lep_svar_place(th, lep);
00192 
00193     switch (key) {
00194       case 0:
00195         return svar->u1.value;
00196       case 1:
00197         return svar->u2.value;
00198       default: {
00199         const VALUE ary = svar->u3.value;
00200 
00201         if (NIL_P(ary)) {
00202             return Qnil;
00203         }
00204         else {
00205             return rb_ary_entry(ary, key - DEFAULT_SPECIAL_VAR_COUNT);
00206         }
00207       }
00208     }
00209 }
00210 
00211 static void
00212 lep_svar_set(rb_thread_t *th, VALUE *lep, rb_num_t key, VALUE val)
00213 {
00214     NODE *svar = lep_svar_place(th, lep);
00215 
00216     switch (key) {
00217       case 0:
00218         svar->u1.value = val;
00219         return;
00220       case 1:
00221         svar->u2.value = val;
00222         return;
00223       default: {
00224         VALUE ary = svar->u3.value;
00225 
00226         if (NIL_P(ary)) {
00227             svar->u3.value = ary = rb_ary_new();
00228         }
00229         rb_ary_store(ary, key - DEFAULT_SPECIAL_VAR_COUNT, val);
00230       }
00231     }
00232 }
00233 
00234 static inline VALUE
00235 vm_getspecial(rb_thread_t *th, VALUE *lep, rb_num_t key, rb_num_t type)
00236 {
00237     VALUE val;
00238 
00239     if (type == 0) {
00240         val = lep_svar_get(th, lep, key);
00241     }
00242     else {
00243         VALUE backref = lep_svar_get(th, lep, 1);
00244 
00245         if (type & 0x01) {
00246             switch (type >> 1) {
00247               case '&':
00248                 val = rb_reg_last_match(backref);
00249                 break;
00250               case '`':
00251                 val = rb_reg_match_pre(backref);
00252                 break;
00253               case '\'':
00254                 val = rb_reg_match_post(backref);
00255                 break;
00256               case '+':
00257                 val = rb_reg_match_last(backref);
00258                 break;
00259               default:
00260                 rb_bug("unexpected back-ref");
00261             }
00262         }
00263         else {
00264             val = rb_reg_nth_match((int)(type >> 1), backref);
00265         }
00266     }
00267     return val;
00268 }
00269 
00270 static NODE *
00271 vm_get_cref0(const rb_iseq_t *iseq, const VALUE *ep)
00272 {
00273     while (1) {
00274         if (VM_EP_LEP_P(ep)) {
00275             if (!RUBY_VM_NORMAL_ISEQ_P(iseq)) return NULL;
00276             return iseq->cref_stack;
00277         }
00278         else if (ep[-1] != Qnil) {
00279             return (NODE *)ep[-1];
00280         }
00281         ep = VM_EP_PREV_EP(ep);
00282     }
00283 }
00284 
00285 NODE *
00286 rb_vm_get_cref(const rb_iseq_t *iseq, const VALUE *ep)
00287 {
00288     NODE *cref = vm_get_cref0(iseq, ep);
00289 
00290     if (cref == 0) {
00291         rb_bug("rb_vm_get_cref: unreachable");
00292     }
00293     return cref;
00294 }
00295 
00296 static NODE *
00297 vm_cref_push(rb_thread_t *th, VALUE klass, int noex, rb_block_t *blockptr)
00298 {
00299     rb_control_frame_t *cfp = vm_get_ruby_level_caller_cfp(th, th->cfp);
00300     NODE *cref = NEW_CREF(klass);
00301     cref->nd_refinements = Qnil;
00302     cref->nd_visi = noex;
00303 
00304     if (blockptr) {
00305         cref->nd_next = vm_get_cref0(blockptr->iseq, blockptr->ep);
00306     }
00307     else if (cfp) {
00308         cref->nd_next = vm_get_cref0(cfp->iseq, cfp->ep);
00309     }
00310     /* TODO: why cref->nd_next is 1? */
00311     if (cref->nd_next && cref->nd_next != (void *) 1 &&
00312         !NIL_P(cref->nd_next->nd_refinements)) {
00313         COPY_CREF_OMOD(cref, cref->nd_next);
00314     }
00315 
00316     return cref;
00317 }
00318 
00319 static inline VALUE
00320 vm_get_cbase(const rb_iseq_t *iseq, const VALUE *ep)
00321 {
00322     NODE *cref = rb_vm_get_cref(iseq, ep);
00323     VALUE klass = Qundef;
00324 
00325     while (cref) {
00326         if ((klass = cref->nd_clss) != 0) {
00327             break;
00328         }
00329         cref = cref->nd_next;
00330     }
00331 
00332     return klass;
00333 }
00334 
00335 static inline VALUE
00336 vm_get_const_base(const rb_iseq_t *iseq, const VALUE *ep)
00337 {
00338     NODE *cref = rb_vm_get_cref(iseq, ep);
00339     VALUE klass = Qundef;
00340 
00341     while (cref) {
00342         if (!(cref->flags & NODE_FL_CREF_PUSHED_BY_EVAL) &&
00343             (klass = cref->nd_clss) != 0) {
00344             break;
00345         }
00346         cref = cref->nd_next;
00347     }
00348 
00349     return klass;
00350 }
00351 
00352 static inline void
00353 vm_check_if_namespace(VALUE klass)
00354 {
00355     VALUE str;
00356     if (!RB_TYPE_P(klass, T_CLASS) && !RB_TYPE_P(klass, T_MODULE)) {
00357         str = rb_inspect(klass);
00358         rb_raise(rb_eTypeError, "%s is not a class/module",
00359                  StringValuePtr(str));
00360     }
00361 }
00362 
00363 static inline VALUE
00364 vm_get_iclass(rb_control_frame_t *cfp, VALUE klass)
00365 {
00366     if (RB_TYPE_P(klass, T_MODULE) &&
00367         FL_TEST(klass, RMODULE_IS_OVERLAID) &&
00368         RB_TYPE_P(cfp->klass, T_ICLASS) &&
00369         RBASIC(cfp->klass)->klass == klass) {
00370         return cfp->klass;
00371     }
00372     else {
00373         return klass;
00374     }
00375 }
00376 
00377 static inline VALUE
00378 vm_get_ev_const(rb_thread_t *th, const rb_iseq_t *iseq,
00379                 VALUE orig_klass, ID id, int is_defined)
00380 {
00381     VALUE val;
00382 
00383     if (orig_klass == Qnil) {
00384         /* in current lexical scope */
00385         const NODE *root_cref = rb_vm_get_cref(iseq, th->cfp->ep);
00386         const NODE *cref;
00387         VALUE klass = orig_klass;
00388 
00389         while (root_cref && root_cref->flags & NODE_FL_CREF_PUSHED_BY_EVAL) {
00390             root_cref = root_cref->nd_next;
00391         }
00392         cref = root_cref;
00393         while (cref && cref->nd_next) {
00394             if (cref->flags & NODE_FL_CREF_PUSHED_BY_EVAL) {
00395                 klass = Qnil;
00396             }
00397             else {
00398                 klass = cref->nd_clss;
00399             }
00400             cref = cref->nd_next;
00401 
00402             if (!NIL_P(klass)) {
00403                 VALUE av, am = 0;
00404                 st_data_t data;
00405               search_continue:
00406                 if (RCLASS_CONST_TBL(klass) &&
00407                     st_lookup(RCLASS_CONST_TBL(klass), id, &data)) {
00408                     val = ((rb_const_entry_t*)data)->value;
00409                     if (val == Qundef) {
00410                         if (am == klass) break;
00411                         am = klass;
00412                         if (is_defined) return 1;
00413                         if (rb_autoloading_value(klass, id, &av)) return av;
00414                         rb_autoload_load(klass, id);
00415                         goto search_continue;
00416                     }
00417                     else {
00418                         if (is_defined) {
00419                             return 1;
00420                         }
00421                         else {
00422                             return val;
00423                         }
00424                     }
00425                 }
00426             }
00427         }
00428 
00429         /* search self */
00430         if (root_cref && !NIL_P(root_cref->nd_clss)) {
00431             klass = vm_get_iclass(th->cfp, root_cref->nd_clss);
00432         }
00433         else {
00434             klass = CLASS_OF(th->cfp->self);
00435         }
00436 
00437         if (is_defined) {
00438             return rb_const_defined(klass, id);
00439         }
00440         else {
00441             return rb_const_get(klass, id);
00442         }
00443     }
00444     else {
00445         vm_check_if_namespace(orig_klass);
00446         if (is_defined) {
00447             return rb_public_const_defined_from(orig_klass, id);
00448         }
00449         else {
00450             return rb_public_const_get_from(orig_klass, id);
00451         }
00452     }
00453 }
00454 
00455 static inline VALUE
00456 vm_get_cvar_base(NODE *cref, rb_control_frame_t *cfp)
00457 {
00458     VALUE klass;
00459 
00460     if (!cref) {
00461         rb_bug("vm_get_cvar_base: no cref");
00462     }
00463 
00464     while (cref->nd_next &&
00465            (NIL_P(cref->nd_clss) || FL_TEST(cref->nd_clss, FL_SINGLETON) ||
00466             (cref->flags & NODE_FL_CREF_PUSHED_BY_EVAL))) {
00467         cref = cref->nd_next;
00468     }
00469     if (!cref->nd_next) {
00470         rb_warn("class variable access from toplevel");
00471     }
00472 
00473     klass = vm_get_iclass(cfp, cref->nd_clss);
00474 
00475     if (NIL_P(klass)) {
00476         rb_raise(rb_eTypeError, "no class variables available");
00477     }
00478     return klass;
00479 }
00480 
00481 static VALUE
00482 vm_search_const_defined_class(const VALUE cbase, ID id)
00483 {
00484     if (rb_const_defined_at(cbase, id)) return cbase;
00485     if (cbase == rb_cObject) {
00486         VALUE tmp = RCLASS_SUPER(cbase);
00487         while (tmp) {
00488             if (rb_const_defined_at(tmp, id)) return tmp;
00489             tmp = RCLASS_SUPER(tmp);
00490         }
00491     }
00492     return 0;
00493 }
00494 
00495 #ifndef USE_IC_FOR_IVAR
00496 #define USE_IC_FOR_IVAR 1
00497 #endif
00498 
00499 static inline VALUE
00500 vm_getivar(VALUE obj, ID id, IC ic, rb_call_info_t *ci, int is_attr)
00501 {
00502 #if USE_IC_FOR_IVAR
00503     if (RB_TYPE_P(obj, T_OBJECT)) {
00504         VALUE val = Qundef;
00505         VALUE klass = RBASIC(obj)->klass;
00506 
00507         if (LIKELY((!is_attr && (ic->ic_class == klass && ic->ic_vmstat == GET_VM_STATE_VERSION())) ||
00508                    (is_attr && ci->aux.index > 0))) {
00509             long index = !is_attr ? ic->ic_value.index : ci->aux.index - 1;
00510             long len = ROBJECT_NUMIV(obj);
00511             VALUE *ptr = ROBJECT_IVPTR(obj);
00512 
00513             if (index < len) {
00514                 val = ptr[index];
00515             }
00516         }
00517         else {
00518             st_data_t index;
00519             long len = ROBJECT_NUMIV(obj);
00520             VALUE *ptr = ROBJECT_IVPTR(obj);
00521             struct st_table *iv_index_tbl = ROBJECT_IV_INDEX_TBL(obj);
00522 
00523             if (iv_index_tbl) {
00524                 if (st_lookup(iv_index_tbl, id, &index)) {
00525                     if ((long)index < len) {
00526                         val = ptr[index];
00527                     }
00528                     if (!is_attr) {
00529                         ic->ic_class = klass;
00530                         ic->ic_value.index = index;
00531                         ic->ic_vmstat = GET_VM_STATE_VERSION();
00532                     }
00533                     else { /* call_info */
00534                         ci->aux.index = index + 1;
00535                     }
00536                 }
00537             }
00538         }
00539 
00540         if (UNLIKELY(val == Qundef)) {
00541             if (!is_attr) rb_warning("instance variable %s not initialized", rb_id2name(id));
00542             val = Qnil;
00543         }
00544         return val;
00545     }
00546 #endif  /* USE_IC_FOR_IVAR */
00547     if (is_attr)
00548         return rb_attr_get(obj, id);
00549     return rb_ivar_get(obj, id);
00550 }
00551 
00552 static inline VALUE
00553 vm_setivar(VALUE obj, ID id, VALUE val, IC ic, rb_call_info_t *ci, int is_attr)
00554 {
00555 #if USE_IC_FOR_IVAR
00556     if (!OBJ_UNTRUSTED(obj) && rb_safe_level() >= 4) {
00557         rb_raise(rb_eSecurityError, "Insecure: can't modify instance variable");
00558     }
00559 
00560     rb_check_frozen(obj);
00561 
00562     if (RB_TYPE_P(obj, T_OBJECT)) {
00563         VALUE klass = RBASIC(obj)->klass;
00564         st_data_t index;
00565 
00566         if (LIKELY(
00567             (!is_attr && ic->ic_class == klass && ic->ic_vmstat == GET_VM_STATE_VERSION()) ||
00568             (is_attr && ci->aux.index > 0))) {
00569             long index = !is_attr ? ic->ic_value.index : ci->aux.index-1;
00570             long len = ROBJECT_NUMIV(obj);
00571             VALUE *ptr = ROBJECT_IVPTR(obj);
00572 
00573             if (index < len) {
00574                 ptr[index] = val;
00575                 return val; /* inline cache hit */
00576             }
00577         }
00578         else {
00579             struct st_table *iv_index_tbl = ROBJECT_IV_INDEX_TBL(obj);
00580 
00581             if (iv_index_tbl && st_lookup(iv_index_tbl, (st_data_t)id, &index)) {
00582                 if (!is_attr) {
00583                     ic->ic_class = klass;
00584                     ic->ic_value.index = index;
00585                     ic->ic_vmstat = GET_VM_STATE_VERSION();
00586                 }
00587                 else {
00588                     ci->aux.index = index + 1;
00589                 }
00590             }
00591             /* fall through */
00592         }
00593     }
00594 #endif  /* USE_IC_FOR_IVAR */
00595     return rb_ivar_set(obj, id, val);
00596 }
00597 
00598 static VALUE
00599 vm_getinstancevariable(VALUE obj, ID id, IC ic)
00600 {
00601     return vm_getivar(obj, id, ic, 0, 0);
00602 }
00603 
00604 static void
00605 vm_setinstancevariable(VALUE obj, ID id, VALUE val, IC ic)
00606 {
00607     vm_setivar(obj, id, val, ic, 0, 0);
00608 }
00609 
00610 static VALUE
00611 vm_throw(rb_thread_t *th, rb_control_frame_t *reg_cfp,
00612          rb_num_t throw_state, VALUE throwobj)
00613 {
00614     int state = (int)(throw_state & 0xff);
00615     int flag = (int)(throw_state & 0x8000);
00616     rb_num_t level = throw_state >> 16;
00617 
00618     if (state != 0) {
00619         VALUE *pt = 0;
00620         if (flag != 0) {
00621             pt = (void *) 1;
00622         }
00623         else {
00624             if (state == TAG_BREAK) {
00625                 rb_control_frame_t *cfp = GET_CFP();
00626                 VALUE *ep = GET_EP();
00627                 int is_orphan = 1;
00628                 rb_iseq_t *base_iseq = GET_ISEQ();
00629 
00630               search_parent:
00631                 if (cfp->iseq->type != ISEQ_TYPE_BLOCK) {
00632                     if (cfp->iseq->type == ISEQ_TYPE_CLASS) {
00633                         cfp = RUBY_VM_PREVIOUS_CONTROL_FRAME(cfp);
00634                         ep = cfp->ep;
00635                         goto search_parent;
00636                     }
00637                     ep = VM_EP_PREV_EP(ep);
00638                     base_iseq = base_iseq->parent_iseq;
00639 
00640                     while ((VALUE *) cfp < th->stack + th->stack_size) {
00641                         if (cfp->ep == ep) {
00642                             goto search_parent;
00643                         }
00644                         cfp = RUBY_VM_PREVIOUS_CONTROL_FRAME(cfp);
00645                     }
00646                     rb_bug("VM (throw): can't find break base.");
00647                 }
00648 
00649                 if (VM_FRAME_TYPE(cfp) == VM_FRAME_MAGIC_LAMBDA) {
00650                     /* lambda{... break ...} */
00651                     is_orphan = 0;
00652                     pt = cfp->ep;
00653                     state = TAG_RETURN;
00654                 }
00655                 else {
00656                     ep = VM_EP_PREV_EP(ep);
00657 
00658                     while ((VALUE *)cfp < th->stack + th->stack_size) {
00659                         if (cfp->ep == ep) {
00660                             VALUE epc = cfp->pc - cfp->iseq->iseq_encoded;
00661                             rb_iseq_t *iseq = cfp->iseq;
00662                             int i;
00663 
00664                             for (i=0; i<iseq->catch_table_size; i++) {
00665                                 struct iseq_catch_table_entry *entry = &iseq->catch_table[i];
00666 
00667                                 if (entry->type == CATCH_TYPE_BREAK &&
00668                                     entry->start < epc && entry->end >= epc) {
00669                                     if (entry->cont == epc) {
00670                                         goto found;
00671                                     }
00672                                     else {
00673                                         break;
00674                                     }
00675                                 }
00676                             }
00677                             break;
00678 
00679                           found:
00680                             pt = ep;
00681                             is_orphan = 0;
00682                             break;
00683                         }
00684                         cfp = RUBY_VM_PREVIOUS_CONTROL_FRAME(cfp);
00685                     }
00686                 }
00687 
00688                 if (is_orphan) {
00689                     rb_vm_localjump_error("break from proc-closure", throwobj, TAG_BREAK);
00690                 }
00691             }
00692             else if (state == TAG_RETRY) {
00693                 rb_num_t i;
00694                 pt = VM_EP_PREV_EP(GET_EP());
00695                 for (i = 0; i < level; i++) {
00696                     pt = GC_GUARDED_PTR_REF((VALUE *) * pt);
00697                 }
00698             }
00699             else if (state == TAG_RETURN) {
00700                 rb_control_frame_t *cfp = GET_CFP();
00701                 VALUE *ep = GET_EP();
00702                 VALUE *target_lep = VM_CF_LEP(cfp);
00703                 int in_class_frame = 0;
00704 
00705                 /* check orphan and get dfp */
00706                 while ((VALUE *) cfp < th->stack + th->stack_size) {
00707                     VALUE *lep = VM_CF_LEP(cfp);
00708 
00709                     if (!target_lep) {
00710                         target_lep = lep;
00711                     }
00712 
00713                     if (lep == target_lep && cfp->iseq->type == ISEQ_TYPE_CLASS) {
00714                         in_class_frame = 1;
00715                         target_lep = 0;
00716                     }
00717 
00718                     if (lep == target_lep) {
00719                         if (VM_FRAME_TYPE(cfp) == VM_FRAME_MAGIC_LAMBDA) {
00720                             VALUE *tep = ep;
00721 
00722                             if (in_class_frame) {
00723                                 /* lambda {class A; ... return ...; end} */
00724                                 ep = cfp->ep;
00725                                 goto valid_return;
00726                             }
00727 
00728                             while (target_lep != tep) {
00729                                 if (cfp->ep == tep) {
00730                                     /* in lambda */
00731                                     ep = cfp->ep;
00732                                     goto valid_return;
00733                                 }
00734                                 tep = VM_EP_PREV_EP(tep);
00735                             }
00736                         }
00737                     }
00738 
00739                     if (cfp->ep == target_lep && cfp->iseq->type == ISEQ_TYPE_METHOD) {
00740                         ep = target_lep;
00741                         goto valid_return;
00742                     }
00743 
00744                     cfp = RUBY_VM_PREVIOUS_CONTROL_FRAME(cfp);
00745                 }
00746 
00747                 rb_vm_localjump_error("unexpected return", throwobj, TAG_RETURN);
00748 
00749               valid_return:
00750                 pt = ep;
00751             }
00752             else {
00753                 rb_bug("isns(throw): unsupport throw type");
00754             }
00755         }
00756         th->state = state;
00757         return (VALUE)NEW_THROW_OBJECT(throwobj, (VALUE) pt, state);
00758     }
00759     else {
00760         /* continue throw */
00761         VALUE err = throwobj;
00762 
00763         if (FIXNUM_P(err)) {
00764             th->state = FIX2INT(err);
00765         }
00766         else if (SYMBOL_P(err)) {
00767             th->state = TAG_THROW;
00768         }
00769         else if (BUILTIN_TYPE(err) == T_NODE) {
00770             th->state = GET_THROWOBJ_STATE(err);
00771         }
00772         else {
00773             th->state = TAG_RAISE;
00774             /*th->state = FIX2INT(rb_ivar_get(err, idThrowState));*/
00775         }
00776         return err;
00777     }
00778 }
00779 
00780 static inline void
00781 vm_expandarray(rb_control_frame_t *cfp, VALUE ary, rb_num_t num, int flag)
00782 {
00783     int is_splat = flag & 0x01;
00784     rb_num_t space_size = num + is_splat;
00785     VALUE *base = cfp->sp, *ptr;
00786     rb_num_t len;
00787 
00788     if (!RB_TYPE_P(ary, T_ARRAY)) {
00789         ary = rb_ary_to_ary(ary);
00790     }
00791 
00792     cfp->sp += space_size;
00793 
00794     ptr = RARRAY_PTR(ary);
00795     len = (rb_num_t)RARRAY_LEN(ary);
00796 
00797     if (flag & 0x02) {
00798         /* post: ..., nil ,ary[-1], ..., ary[0..-num] # top */
00799         rb_num_t i = 0, j;
00800 
00801         if (len < num) {
00802             for (i=0; i<num-len; i++) {
00803                 *base++ = Qnil;
00804             }
00805         }
00806         for (j=0; i<num; i++, j++) {
00807             VALUE v = ptr[len - j - 1];
00808             *base++ = v;
00809         }
00810         if (is_splat) {
00811             *base = rb_ary_new4(len - j, ptr);
00812         }
00813     }
00814     else {
00815         /* normal: ary[num..-1], ary[num-2], ary[num-3], ..., ary[0] # top */
00816         rb_num_t i;
00817         VALUE *bptr = &base[space_size - 1];
00818 
00819         for (i=0; i<num; i++) {
00820             if (len <= i) {
00821                 for (; i<num; i++) {
00822                     *bptr-- = Qnil;
00823                 }
00824                 break;
00825             }
00826             *bptr-- = ptr[i];
00827         }
00828         if (is_splat) {
00829             if (num > len) {
00830                 *bptr = rb_ary_new();
00831             }
00832             else {
00833                 *bptr = rb_ary_new4(len - num, ptr + num);
00834             }
00835         }
00836     }
00837     RB_GC_GUARD(ary);
00838 }
00839 
00840 static VALUE vm_call_general(rb_thread_t *th, rb_control_frame_t *reg_cfp, rb_call_info_t *ci);
00841 
00842 static void
00843 vm_search_method(rb_call_info_t *ci, VALUE recv)
00844 {
00845     VALUE klass = CLASS_OF(recv);
00846 
00847 #if OPT_INLINE_METHOD_CACHE
00848     if (LIKELY(GET_VM_STATE_VERSION() == ci->vmstat && klass == ci->klass)) {
00849         /* cache hit! */
00850     }
00851     else {
00852         ci->me = rb_method_entry(klass, ci->mid, &ci->defined_class);
00853         ci->klass = klass;
00854         ci->vmstat = GET_VM_STATE_VERSION();
00855         ci->call = vm_call_general;
00856     }
00857 #else
00858     ci->me = rb_method_entry(klass, ci->mid, &ci->defined_class);
00859     ci->call = vm_call_general;
00860     ci->klass = klass;
00861 #endif
00862 }
00863 
00864 static inline int
00865 check_cfunc(const rb_method_entry_t *me, VALUE (*func)())
00866 {
00867     if (me && me->def->type == VM_METHOD_TYPE_CFUNC &&
00868         me->def->body.cfunc.func == func) {
00869         return 1;
00870     }
00871     else {
00872         return 0;
00873     }
00874 }
00875 
00876 static
00877 #ifndef NO_BIG_INLINE
00878 inline
00879 #endif
00880 VALUE
00881 opt_eq_func(VALUE recv, VALUE obj, CALL_INFO ci)
00882 {
00883     if (FIXNUM_2_P(recv, obj) &&
00884         BASIC_OP_UNREDEFINED_P(BOP_EQ, FIXNUM_REDEFINED_OP_FLAG)) {
00885         return (recv == obj) ? Qtrue : Qfalse;
00886     }
00887     else if (FLONUM_2_P(recv, obj) &&
00888              BASIC_OP_UNREDEFINED_P(BOP_EQ, FLOAT_REDEFINED_OP_FLAG)) {
00889         return (recv == obj) ? Qtrue : Qfalse;
00890     }
00891     else if (!SPECIAL_CONST_P(recv) && !SPECIAL_CONST_P(obj)) {
00892         if (HEAP_CLASS_OF(recv) == rb_cFloat &&
00893                  HEAP_CLASS_OF(obj) == rb_cFloat &&
00894             BASIC_OP_UNREDEFINED_P(BOP_EQ, FLOAT_REDEFINED_OP_FLAG)) {
00895             double a = RFLOAT_VALUE(recv);
00896             double b = RFLOAT_VALUE(obj);
00897 
00898             if (isnan(a) || isnan(b)) {
00899                 return Qfalse;
00900             }
00901             return  (a == b) ? Qtrue : Qfalse;
00902         }
00903         else if (HEAP_CLASS_OF(recv) == rb_cString &&
00904                  HEAP_CLASS_OF(obj) == rb_cString &&
00905                  BASIC_OP_UNREDEFINED_P(BOP_EQ, STRING_REDEFINED_OP_FLAG)) {
00906             return rb_str_equal(recv, obj);
00907         }
00908     }
00909 
00910     {
00911         vm_search_method(ci, recv);
00912 
00913         if (check_cfunc(ci->me, rb_obj_equal)) {
00914             return recv == obj ? Qtrue : Qfalse;
00915         }
00916     }
00917 
00918     return Qundef;
00919 }
00920 
00921 static VALUE
00922 vm_call0(rb_thread_t*, VALUE, ID, int, const VALUE*, const rb_method_entry_t*, VALUE);
00923 
00924 static VALUE
00925 check_match(VALUE pattern, VALUE target, enum vm_check_match_type type)
00926 {
00927     switch (type) {
00928       case VM_CHECKMATCH_TYPE_WHEN:
00929         return pattern;
00930       case VM_CHECKMATCH_TYPE_RESCUE:
00931         if (!rb_obj_is_kind_of(pattern, rb_cModule)) {
00932             rb_raise(rb_eTypeError, "class or module required for rescue clause");
00933         }
00934         /* fall through */
00935       case VM_CHECKMATCH_TYPE_CASE: {
00936         VALUE defined_class;
00937         rb_method_entry_t *me = rb_method_entry_with_refinements(CLASS_OF(pattern), idEqq, &defined_class);
00938         return vm_call0(GET_THREAD(), pattern, idEqq, 1, &target, me, defined_class);
00939       }
00940       default:
00941         rb_bug("check_match: unreachable");
00942     }
00943 }
00944 
00945 
00946 #if defined(_MSC_VER) && _MSC_VER < 1300
00947 #define CHECK_CMP_NAN(a, b) if (isnan(a) || isnan(b)) return Qfalse;
00948 #else
00949 #define CHECK_CMP_NAN(a, b) /* do nothing */
00950 #endif
00951 
00952 static inline VALUE
00953 double_cmp_lt(double a, double b)
00954 {
00955     CHECK_CMP_NAN(a, b);
00956     return a < b ? Qtrue : Qfalse;
00957 }
00958 
00959 static inline VALUE
00960 double_cmp_le(double a, double b)
00961 {
00962     CHECK_CMP_NAN(a, b);
00963     return a <= b ? Qtrue : Qfalse;
00964 }
00965 
00966 static inline VALUE
00967 double_cmp_gt(double a, double b)
00968 {
00969     CHECK_CMP_NAN(a, b);
00970     return a > b ? Qtrue : Qfalse;
00971 }
00972 
00973 static inline VALUE
00974 double_cmp_ge(double a, double b)
00975 {
00976     CHECK_CMP_NAN(a, b);
00977     return a >= b ? Qtrue : Qfalse;
00978 }
00979 
00980 static VALUE *
00981 vm_base_ptr(rb_control_frame_t *cfp)
00982 {
00983     rb_control_frame_t *prev_cfp = RUBY_VM_PREVIOUS_CONTROL_FRAME(cfp);
00984     VALUE *bp = prev_cfp->sp + cfp->iseq->local_size + 1;
00985 
00986     if (cfp->iseq->type == ISEQ_TYPE_METHOD) {
00987         /* adjust `self' */
00988         bp += 1;
00989     }
00990 
00991 #if VM_DEBUG_BP_CHECK
00992     if (bp != cfp->bp_check) {
00993         fprintf(stderr, "bp_check: %ld, bp: %ld\n",
00994                 (long)(cfp->bp_check - GET_THREAD()->stack),
00995                 (long)(bp - GET_THREAD()->stack));
00996         rb_bug("vm_base_ptr: unreachable");
00997     }
00998 #endif
00999 
01000     return bp;
01001 }
01002 
01003 /* method call processes with call_info */
01004 
01005 static void
01006 vm_caller_setup_args(const rb_thread_t *th, rb_control_frame_t *cfp, rb_call_info_t *ci)
01007 {
01008 #define SAVE_RESTORE_CI(expr, ci) do { \
01009     int saved_argc = (ci)->argc; rb_block_t *saved_blockptr = (ci)->blockptr; /* save */ \
01010     expr; \
01011     (ci)->argc = saved_argc; (ci)->blockptr = saved_blockptr; /* restore */ \
01012 } while (0)
01013 
01014     if (UNLIKELY(ci->flag & VM_CALL_ARGS_BLOCKARG)) {
01015         rb_proc_t *po;
01016         VALUE proc;
01017 
01018         proc = *(--cfp->sp);
01019 
01020         if (proc != Qnil) {
01021             if (!rb_obj_is_proc(proc)) {
01022                 VALUE b;
01023 
01024                 SAVE_RESTORE_CI(b = rb_check_convert_type(proc, T_DATA, "Proc", "to_proc"), ci);
01025 
01026                 if (NIL_P(b) || !rb_obj_is_proc(b)) {
01027                     rb_raise(rb_eTypeError,
01028                              "wrong argument type %s (expected Proc)",
01029                              rb_obj_classname(proc));
01030                 }
01031                 proc = b;
01032             }
01033             GetProcPtr(proc, po);
01034             ci->blockptr = &po->block;
01035             RUBY_VM_GET_BLOCK_PTR_IN_CFP(cfp)->proc = proc;
01036         }
01037     }
01038     else if (ci->blockiseq != 0) { /* likely */
01039         ci->blockptr = RUBY_VM_GET_BLOCK_PTR_IN_CFP(cfp);
01040         ci->blockptr->iseq = ci->blockiseq;
01041         ci->blockptr->proc = 0;
01042     }
01043 
01044     /* expand top of stack? */
01045 
01046     if (UNLIKELY(ci->flag & VM_CALL_ARGS_SPLAT)) {
01047         VALUE ary = *(cfp->sp - 1);
01048         VALUE *ptr;
01049         int i;
01050         VALUE tmp;
01051 
01052         SAVE_RESTORE_CI(tmp = rb_check_convert_type(ary, T_ARRAY, "Array", "to_a"), ci);
01053 
01054         if (NIL_P(tmp)) {
01055             /* do nothing */
01056         }
01057         else {
01058             long len = RARRAY_LEN(tmp);
01059             ptr = RARRAY_PTR(tmp);
01060             cfp->sp -= 1;
01061 
01062             CHECK_VM_STACK_OVERFLOW(cfp, len);
01063 
01064             for (i = 0; i < len; i++) {
01065                 *cfp->sp++ = ptr[i];
01066             }
01067             ci->argc += i-1;
01068         }
01069     }
01070 }
01071 
01072 static int
01073 separate_symbol(st_data_t key, st_data_t value, st_data_t arg)
01074 {
01075     VALUE *kwdhash = (VALUE *)arg;
01076 
01077     if (!SYMBOL_P(key)) kwdhash++;
01078     if (!*kwdhash) *kwdhash = rb_hash_new();
01079     rb_hash_aset(*kwdhash, (VALUE)key, (VALUE)value);
01080     return ST_CONTINUE;
01081 }
01082 
01083 static VALUE
01084 extract_keywords(VALUE *orighash)
01085 {
01086     VALUE parthash[2] = {0, 0};
01087     VALUE hash = *orighash;
01088 
01089     if (RHASH_EMPTY_P(hash)) {
01090         *orighash = 0;
01091         return hash;
01092     }
01093     st_foreach(RHASH_TBL(hash), separate_symbol, (st_data_t)&parthash);
01094     *orighash = parthash[1];
01095     return parthash[0];
01096 }
01097 
01098 static inline int
01099 vm_callee_setup_keyword_arg(const rb_iseq_t *iseq, int argc, int m, VALUE *orig_argv, VALUE *kwd)
01100 {
01101     VALUE keyword_hash, orig_hash;
01102     int i, j;
01103 
01104     if (argc > m &&
01105         !NIL_P(orig_hash = rb_check_hash_type(orig_argv[argc-1])) &&
01106         (keyword_hash = extract_keywords(&orig_hash)) != 0) {
01107         if (!orig_hash) {
01108             argc--;
01109         }
01110         else {
01111             orig_argv[argc-1] = orig_hash;
01112         }
01113         if (iseq->arg_keyword_check) {
01114             for (i = j = 0; i < iseq->arg_keywords; i++) {
01115                 if (st_lookup(RHASH_TBL(keyword_hash), ID2SYM(iseq->arg_keyword_table[i]), 0)) j++;
01116             }
01117             if (RHASH_TBL(keyword_hash)->num_entries > (unsigned int) j) {
01118                 unknown_keyword_error(iseq, keyword_hash);
01119             }
01120         }
01121     }
01122     else {
01123         keyword_hash = rb_hash_new();
01124     }
01125 
01126     *kwd = keyword_hash;
01127 
01128     return argc;
01129 }
01130 
01131 static inline int
01132 vm_callee_setup_arg_complex(rb_thread_t *th, rb_call_info_t *ci, const rb_iseq_t *iseq, VALUE *orig_argv)
01133 {
01134     const int m = iseq->argc;
01135     const int opts = iseq->arg_opts - (iseq->arg_opts > 0);
01136     const int min = m + iseq->arg_post_len;
01137     const int max = (iseq->arg_rest == -1) ? m + opts + iseq->arg_post_len : UNLIMITED_ARGUMENTS;
01138     const int orig_argc = ci->argc;
01139     int argc = orig_argc;
01140     VALUE *argv = orig_argv;
01141     VALUE keyword_hash = Qnil;
01142     rb_num_t opt_pc = 0;
01143 
01144     th->mark_stack_len = argc + iseq->arg_size;
01145 
01146     /* keyword argument */
01147     if (iseq->arg_keyword != -1) {
01148         argc = vm_callee_setup_keyword_arg(iseq, argc, m, orig_argv, &keyword_hash);
01149     }
01150 
01151     /* mandatory */
01152     if ((argc < min) || (argc > max && max != UNLIMITED_ARGUMENTS)) {
01153         argument_error(iseq, argc, min, max);
01154     }
01155 
01156     argv += m;
01157     argc -= m;
01158 
01159     /* post arguments */
01160     if (iseq->arg_post_len) {
01161         if (!(orig_argc < iseq->arg_post_start)) {
01162             VALUE *new_argv = ALLOCA_N(VALUE, argc);
01163             MEMCPY(new_argv, argv, VALUE, argc);
01164             argv = new_argv;
01165         }
01166 
01167         MEMCPY(&orig_argv[iseq->arg_post_start], &argv[argc -= iseq->arg_post_len],
01168                VALUE, iseq->arg_post_len);
01169     }
01170 
01171     /* opt arguments */
01172     if (iseq->arg_opts) {
01173         if (argc > opts) {
01174             argc -= opts;
01175             argv += opts;
01176             opt_pc = iseq->arg_opt_table[opts]; /* no opt */
01177         }
01178         else {
01179             int i;
01180             for (i = argc; i<opts; i++) {
01181                 orig_argv[i + m] = Qnil;
01182             }
01183             opt_pc = iseq->arg_opt_table[argc];
01184             argc = 0;
01185         }
01186     }
01187 
01188     /* rest arguments */
01189     if (iseq->arg_rest != -1) {
01190         orig_argv[iseq->arg_rest] = rb_ary_new4(argc, argv);
01191         argc = 0;
01192     }
01193 
01194     /* keyword argument */
01195     if (iseq->arg_keyword != -1) {
01196         orig_argv[iseq->arg_keyword] = keyword_hash;
01197     }
01198 
01199     /* block arguments */
01200     if (iseq->arg_block != -1) {
01201         VALUE blockval = Qnil;
01202         const rb_block_t *blockptr = ci->blockptr;
01203 
01204         if (blockptr) {
01205             /* make Proc object */
01206             if (blockptr->proc == 0) {
01207                 rb_proc_t *proc;
01208                 blockval = rb_vm_make_proc(th, blockptr, rb_cProc);
01209                 GetProcPtr(blockval, proc);
01210                 ci->blockptr = &proc->block;
01211             }
01212             else {
01213                 blockval = blockptr->proc;
01214             }
01215         }
01216 
01217         orig_argv[iseq->arg_block] = blockval; /* Proc or nil */
01218     }
01219 
01220     th->mark_stack_len = 0;
01221     return (int)opt_pc;
01222 }
01223 
01224 static VALUE vm_call_iseq_setup_2(rb_thread_t *th, rb_control_frame_t *cfp, rb_call_info_t *ci);
01225 static inline VALUE vm_call_iseq_setup_normal(rb_thread_t *th, rb_control_frame_t *cfp, rb_call_info_t *ci);
01226 static inline VALUE vm_call_iseq_setup_tailcall(rb_thread_t *th, rb_control_frame_t *cfp, rb_call_info_t *ci);
01227 
01228 #define VM_CALLEE_SETUP_ARG(th, ci, iseq, argv, is_lambda) \
01229     if (LIKELY((iseq)->arg_simple & 0x01)) { \
01230         /* simple check */ \
01231         if ((ci)->argc != (iseq)->argc) { \
01232             argument_error((iseq), ((ci)->argc), (iseq)->argc, (iseq)->argc); \
01233         } \
01234         (ci)->aux.opt_pc = 0; \
01235         CI_SET_FASTPATH((ci), UNLIKELY((ci)->flag & VM_CALL_TAILCALL) ? vm_call_iseq_setup_tailcall : vm_call_iseq_setup_normal, !(is_lambda) && !((ci)->me->flag & NOEX_PROTECTED)); \
01236     } \
01237     else { \
01238         (ci)->aux.opt_pc = vm_callee_setup_arg_complex((th), (ci), (iseq), (argv)); \
01239     }
01240 
01241 static VALUE
01242 vm_call_iseq_setup(rb_thread_t *th, rb_control_frame_t *cfp, rb_call_info_t *ci)
01243 {
01244     VM_CALLEE_SETUP_ARG(th, ci, ci->me->def->body.iseq, cfp->sp - ci->argc, 0);
01245     return vm_call_iseq_setup_2(th, cfp, ci);
01246 }
01247 
01248 static VALUE
01249 vm_call_iseq_setup_2(rb_thread_t *th, rb_control_frame_t *cfp, rb_call_info_t *ci)
01250 {
01251     if (LIKELY(!(ci->flag & VM_CALL_TAILCALL))) {
01252         return vm_call_iseq_setup_normal(th, cfp, ci);
01253     }
01254     else {
01255         return vm_call_iseq_setup_tailcall(th, cfp, ci);
01256     }
01257 }
01258 
01259 static inline VALUE
01260 vm_call_iseq_setup_normal(rb_thread_t *th, rb_control_frame_t *cfp, rb_call_info_t *ci)
01261 {
01262     int i;
01263     VALUE *argv = cfp->sp - ci->argc;
01264     rb_iseq_t *iseq = ci->me->def->body.iseq;
01265     VALUE *sp = argv + iseq->arg_size;
01266 
01267     CHECK_VM_STACK_OVERFLOW(cfp, iseq->stack_max);
01268 
01269     /* clear local variables */
01270     for (i = 0; i < iseq->local_size - iseq->arg_size; i++) {
01271         *sp++ = Qnil;
01272     }
01273 
01274     vm_push_frame(th, iseq, VM_FRAME_MAGIC_METHOD, ci->recv, ci->defined_class,
01275                   VM_ENVVAL_BLOCK_PTR(ci->blockptr),
01276                   iseq->iseq_encoded + ci->aux.opt_pc, sp, 0, ci->me);
01277 
01278     cfp->sp = argv - 1 /* recv */;
01279     return Qundef;
01280 }
01281 
01282 static inline VALUE
01283 vm_call_iseq_setup_tailcall(rb_thread_t *th, rb_control_frame_t *cfp, rb_call_info_t *ci)
01284 {
01285     int i;
01286     VALUE *argv = cfp->sp - ci->argc;
01287     rb_iseq_t *iseq = ci->me->def->body.iseq;
01288     VALUE *src_argv = argv;
01289     VALUE *sp_orig, *sp;
01290     VALUE finish_flag = VM_FRAME_TYPE_FINISH_P(cfp) ? VM_FRAME_FLAG_FINISH : 0;
01291 
01292     cfp = th->cfp = RUBY_VM_PREVIOUS_CONTROL_FRAME(th->cfp); /* pop cf */
01293 
01294     CHECK_VM_STACK_OVERFLOW(cfp, iseq->stack_max);
01295     RUBY_VM_CHECK_INTS(th);
01296 
01297     sp_orig = sp = cfp->sp;
01298 
01299     /* push self */
01300     sp[0] = ci->recv;
01301     sp++;
01302 
01303     /* copy arguments */
01304     for (i=0; i < iseq->arg_size; i++) {
01305         *sp++ = src_argv[i];
01306     }
01307 
01308     /* clear local variables */
01309     for (i = 0; i < iseq->local_size - iseq->arg_size; i++) {
01310         *sp++ = Qnil;
01311     }
01312 
01313     vm_push_frame(th, iseq, VM_FRAME_MAGIC_METHOD | finish_flag,
01314                   ci->recv, ci->defined_class, VM_ENVVAL_BLOCK_PTR(ci->blockptr),
01315                   iseq->iseq_encoded + ci->aux.opt_pc, sp, 0, ci->me);
01316 
01317     cfp->sp = sp_orig;
01318     return Qundef;
01319 }
01320 
01321 static VALUE
01322 call_cfunc_m2(VALUE (*func)(ANYARGS), VALUE recv, int argc, const VALUE *argv)
01323 {
01324     return (*func)(recv, rb_ary_new4(argc, argv));
01325 }
01326 
01327 static VALUE
01328 call_cfunc_m1(VALUE (*func)(ANYARGS), VALUE recv, int argc, const VALUE *argv)
01329 {
01330     return (*func)(argc, argv, recv);
01331 }
01332 
01333 static VALUE
01334 call_cfunc_0(VALUE (*func)(ANYARGS), VALUE recv, int argc, const VALUE *argv)
01335 {
01336     return (*func)(recv);
01337 }
01338 
01339 static VALUE
01340 call_cfunc_1(VALUE (*func)(ANYARGS), VALUE recv, int argc, const VALUE *argv)
01341 {
01342     return (*func)(recv, argv[0]);
01343 }
01344 
01345 static VALUE
01346 call_cfunc_2(VALUE (*func)(ANYARGS), VALUE recv, int argc, const VALUE *argv)
01347 {
01348     return (*func)(recv, argv[0], argv[1]);
01349 }
01350 
01351 static VALUE
01352 call_cfunc_3(VALUE (*func)(ANYARGS), VALUE recv, int argc, const VALUE *argv)
01353 {
01354     return (*func)(recv, argv[0], argv[1], argv[2]);
01355 }
01356 
01357 static VALUE
01358 call_cfunc_4(VALUE (*func)(ANYARGS), VALUE recv, int argc, const VALUE *argv)
01359 {
01360     return (*func)(recv, argv[0], argv[1], argv[2], argv[3]);
01361 }
01362 
01363 static VALUE
01364 call_cfunc_5(VALUE (*func)(ANYARGS), VALUE recv, int argc, const VALUE *argv)
01365 {
01366     return (*func)(recv, argv[0], argv[1], argv[2], argv[3], argv[4]);
01367 }
01368 
01369 static VALUE
01370 call_cfunc_6(VALUE (*func)(ANYARGS), VALUE recv, int argc, const VALUE *argv)
01371 {
01372     return (*func)(recv, argv[0], argv[1], argv[2], argv[3], argv[4], argv[5]);
01373 }
01374 
01375 static VALUE
01376 call_cfunc_7(VALUE (*func)(ANYARGS), VALUE recv, int argc, const VALUE *argv)
01377 {
01378     return (*func)(recv, argv[0], argv[1], argv[2], argv[3], argv[4], argv[5], argv[6]);
01379 }
01380 
01381 static VALUE
01382 call_cfunc_8(VALUE (*func)(ANYARGS), VALUE recv, int argc, const VALUE *argv)
01383 {
01384     return (*func)(recv, argv[0], argv[1], argv[2], argv[3], argv[4], argv[5], argv[6], argv[7]);
01385 }
01386 
01387 static VALUE
01388 call_cfunc_9(VALUE (*func)(ANYARGS), VALUE recv, int argc, const VALUE *argv)
01389 {
01390     return (*func)(recv, argv[0], argv[1], argv[2], argv[3], argv[4], argv[5], argv[6], argv[7], argv[8]);
01391 }
01392 
01393 static VALUE
01394 call_cfunc_10(VALUE (*func)(ANYARGS), VALUE recv, int argc, const VALUE *argv)
01395 {
01396     return (*func)(recv, argv[0], argv[1], argv[2], argv[3], argv[4], argv[5], argv[6], argv[7], argv[8], argv[9]);
01397 }
01398 
01399 static VALUE
01400 call_cfunc_11(VALUE (*func)(ANYARGS), VALUE recv, int argc, const VALUE *argv)
01401 {
01402     return (*func)(recv, argv[0], argv[1], argv[2], argv[3], argv[4], argv[5], argv[6], argv[7], argv[8], argv[9], argv[10]);
01403 }
01404 
01405 static VALUE
01406 call_cfunc_12(VALUE (*func)(ANYARGS), VALUE recv, int argc, const VALUE *argv)
01407 {
01408     return (*func)(recv, argv[0], argv[1], argv[2], argv[3], argv[4], argv[5], argv[6], argv[7], argv[8], argv[9], argv[10], argv[11]);
01409 }
01410 
01411 static VALUE
01412 call_cfunc_13(VALUE (*func)(ANYARGS), VALUE recv, int argc, const VALUE *argv)
01413 {
01414     return (*func)(recv, argv[0], argv[1], argv[2], argv[3], argv[4], argv[5], argv[6], argv[7], argv[8], argv[9], argv[10], argv[11], argv[12]);
01415 }
01416 
01417 static VALUE
01418 call_cfunc_14(VALUE (*func)(ANYARGS), VALUE recv, int argc, const VALUE *argv)
01419 {
01420     return (*func)(recv, argv[0], argv[1], argv[2], argv[3], argv[4], argv[5], argv[6], argv[7], argv[8], argv[9], argv[10], argv[11], argv[12], argv[13]);
01421 }
01422 
01423 static VALUE
01424 call_cfunc_15(VALUE (*func)(ANYARGS), VALUE recv, int argc, const VALUE *argv)
01425 {
01426     return (*func)(recv, argv[0], argv[1], argv[2], argv[3], argv[4], argv[5], argv[6], argv[7], argv[8], argv[9], argv[10], argv[11], argv[12], argv[13], argv[14]);
01427 }
01428 
01429 #ifndef VM_PROFILE
01430 #define VM_PROFILE 0
01431 #endif
01432 
01433 #if VM_PROFILE
01434 static int vm_profile_counter[4];
01435 #define VM_PROFILE_UP(x) (vm_profile_counter[x]++)
01436 #define VM_PROFILE_ATEXIT() atexit(vm_profile_show_result)
01437 static void vm_profile_show_result(void)
01438 {
01439     fprintf(stderr, "VM Profile results: \n");
01440     fprintf(stderr, "r->c call: %d\n", vm_profile_counter[0]);
01441     fprintf(stderr, "r->c popf: %d\n", vm_profile_counter[1]);
01442     fprintf(stderr, "c->c call: %d\n", vm_profile_counter[2]);
01443     fprintf(stderr, "r->c popf: %d\n", vm_profile_counter[3]);
01444 }
01445 #else
01446 #define VM_PROFILE_UP(x)
01447 #define VM_PROFILE_ATEXIT()
01448 #endif
01449 
01450 static VALUE
01451 vm_call_cfunc_with_frame(rb_thread_t *th, rb_control_frame_t *reg_cfp, rb_call_info_t *ci)
01452 {
01453     VALUE val;
01454     const rb_method_entry_t *me = ci->me;
01455     const rb_method_cfunc_t *cfunc = &me->def->body.cfunc;
01456     int len = cfunc->argc;
01457 
01458     /* don't use `ci' after EXEC_EVENT_HOOK because ci can be override */
01459     VALUE recv = ci->recv;
01460     VALUE defined_class = ci->defined_class;
01461     rb_block_t *blockptr = ci->blockptr;
01462     int argc = ci->argc;
01463 
01464     RUBY_DTRACE_CMETHOD_ENTRY_HOOK(th, me->klass, me->called_id);
01465     EXEC_EVENT_HOOK(th, RUBY_EVENT_C_CALL, recv, me->called_id, me->klass, Qundef);
01466 
01467     vm_push_frame(th, 0, VM_FRAME_MAGIC_CFUNC, recv, defined_class,
01468                   VM_ENVVAL_BLOCK_PTR(blockptr), 0, th->cfp->sp, 1, me);
01469 
01470     if (len >= 0) rb_check_arity(argc, len, len);
01471 
01472     reg_cfp->sp -= argc + 1;
01473     VM_PROFILE_UP(0);
01474     val = (*cfunc->invoker)(cfunc->func, recv, argc, reg_cfp->sp + 1);
01475 
01476     if (reg_cfp != th->cfp + 1) {
01477         rb_bug("vm_call_cfunc - cfp consistency error");
01478     }
01479 
01480     vm_pop_frame(th);
01481 
01482     EXEC_EVENT_HOOK(th, RUBY_EVENT_C_RETURN, recv, me->called_id, me->klass, val);
01483     RUBY_DTRACE_CMETHOD_RETURN_HOOK(th, me->klass, me->called_id);
01484 
01485     return val;
01486 }
01487 
01488 #if OPT_CALL_CFUNC_WITHOUT_FRAME
01489 static VALUE
01490 vm_call_cfunc_latter(rb_thread_t *th, rb_control_frame_t *reg_cfp, rb_call_info_t *ci)
01491 {
01492     VALUE val;
01493     int argc = ci->argc;
01494     VALUE *argv = STACK_ADDR_FROM_TOP(argc);
01495     const rb_method_cfunc_t *cfunc = &ci->me->def->body.cfunc;
01496 
01497     th->passed_ci = ci;
01498     reg_cfp->sp -= argc + 1;
01499     ci->aux.inc_sp = argc + 1;
01500     VM_PROFILE_UP(0);
01501     val = (*cfunc->invoker)(cfunc->func, ci, argv);
01502 
01503     /* check */
01504     if (reg_cfp == th->cfp) { /* no frame push */
01505         if (UNLIKELY(th->passed_ci != ci)) {
01506             rb_bug("vm_call_cfunc_latter: passed_ci error (ci: %p, passed_ci: %p)", ci, th->passed_ci);
01507         }
01508         th->passed_ci = 0;
01509     }
01510     else {
01511         if (UNLIKELY(reg_cfp != RUBY_VM_PREVIOUS_CONTROL_FRAME(th->cfp))) {
01512             rb_bug("vm_call_cfunc_latter: cfp consistency error (%p, %p)", reg_cfp, th->cfp+1);
01513         }
01514         vm_pop_frame(th);
01515         VM_PROFILE_UP(1);
01516     }
01517 
01518     return val;
01519 }
01520 
01521 static VALUE
01522 vm_call_cfunc(rb_thread_t *th, rb_control_frame_t *reg_cfp, rb_call_info_t *ci)
01523 {
01524     VALUE val;
01525     const rb_method_entry_t *me = ci->me;
01526     int len = me->def->body.cfunc.argc;
01527     VALUE recv = ci->recv;
01528 
01529     if (len >= 0) rb_check_arity(ci->argc, len, len);
01530 
01531     RUBY_DTRACE_CMETHOD_ENTRY_HOOK(th, me->klass, me->called_id);
01532     EXEC_EVENT_HOOK(th, RUBY_EVENT_C_CALL, recv, me->called_id, me->klass, Qnil);
01533 
01534     if (!(ci->me->flag & NOEX_PROTECTED) &&
01535         !(ci->flag & VM_CALL_ARGS_SPLAT)) {
01536         CI_SET_FASTPATH(ci, vm_call_cfunc_latter, 1);
01537     }
01538     val = vm_call_cfunc_latter(th, reg_cfp, ci);
01539 
01540     EXEC_EVENT_HOOK(th, RUBY_EVENT_C_RETURN, recv, me->called_id, me->klass, val);
01541     RUBY_DTRACE_CMETHOD_RETURN_HOOK(th, me->klass, me->called_id);
01542 
01543     return val;
01544 }
01545 
01546 void
01547 vm_call_cfunc_push_frame(rb_thread_t *th)
01548 {
01549     rb_call_info_t *ci = th->passed_ci;
01550     const rb_method_entry_t *me = ci->me;
01551     th->passed_ci = 0;
01552 
01553     vm_push_frame(th, 0, VM_FRAME_MAGIC_CFUNC, ci->recv, ci->defined_class,
01554                   VM_ENVVAL_BLOCK_PTR(ci->blockptr), 0, th->cfp->sp + ci->aux.inc_sp, 1, me);
01555 
01556     if (ci->call != vm_call_general) {
01557         ci->call = vm_call_cfunc_with_frame;
01558     }
01559 }
01560 #else /* OPT_CALL_CFUNC_WITHOUT_FRAME */
01561 static VALUE
01562 vm_call_cfunc(rb_thread_t *th, rb_control_frame_t *reg_cfp, rb_call_info_t *ci)
01563 {
01564     return vm_call_cfunc_with_frame(th, reg_cfp, ci);
01565 }
01566 #endif
01567 
01568 static VALUE
01569 vm_call_ivar(rb_thread_t *th, rb_control_frame_t *cfp, rb_call_info_t *ci)
01570 {
01571     VALUE val = vm_getivar(ci->recv, ci->me->def->body.attr.id, 0, ci, 1);
01572     cfp->sp -= 1;
01573     return val;
01574 }
01575 
01576 static VALUE
01577 vm_call_attrset(rb_thread_t *th, rb_control_frame_t *cfp, rb_call_info_t *ci)
01578 {
01579     VALUE val = vm_setivar(ci->recv, ci->me->def->body.attr.id, *(cfp->sp - 1), 0, ci, 1);
01580     cfp->sp -= 2;
01581     return val;
01582 }
01583 
01584 static inline VALUE
01585 vm_call_bmethod_body(rb_thread_t *th, rb_call_info_t *ci, const VALUE *argv)
01586 {
01587     rb_proc_t *proc;
01588     VALUE val;
01589 
01590     RUBY_DTRACE_METHOD_ENTRY_HOOK(th, ci->me->klass, ci->me->called_id);
01591     EXEC_EVENT_HOOK(th, RUBY_EVENT_CALL, ci->recv, ci->me->called_id, ci->me->klass, Qnil);
01592 
01593     /* control block frame */
01594     th->passed_me = ci->me;
01595     GetProcPtr(ci->me->def->body.proc, proc);
01596     val = vm_invoke_proc(th, proc, ci->recv, ci->defined_class, ci->argc, argv, ci->blockptr);
01597 
01598     EXEC_EVENT_HOOK(th, RUBY_EVENT_RETURN, ci->recv, ci->me->called_id, ci->me->klass, val);
01599     RUBY_DTRACE_METHOD_RETURN_HOOK(th, ci->me->klass, ci->me->called_id);
01600 
01601     return val;
01602 }
01603 
01604 static VALUE
01605 vm_call_bmethod(rb_thread_t *th, rb_control_frame_t *cfp, rb_call_info_t *ci)
01606 {
01607     VALUE *argv = ALLOCA_N(VALUE, ci->argc);
01608     MEMCPY(argv, cfp->sp - ci->argc, VALUE, ci->argc);
01609     cfp->sp += - ci->argc - 1;
01610 
01611     return vm_call_bmethod_body(th, ci, argv);
01612 }
01613 
01614 static
01615 #ifdef _MSC_VER
01616 __forceinline
01617 #else
01618 inline
01619 #endif
01620 VALUE vm_call_method(rb_thread_t *th, rb_control_frame_t *cfp, rb_call_info_t *ci);
01621 
01622 static VALUE
01623 vm_call_opt_send(rb_thread_t *th, rb_control_frame_t *reg_cfp, rb_call_info_t *ci)
01624 {
01625     int i = ci->argc - 1;
01626     VALUE sym;
01627     rb_call_info_t ci_entry;
01628 
01629     if (ci->argc == 0) {
01630         rb_raise(rb_eArgError, "no method name given");
01631     }
01632 
01633     ci_entry = *ci; /* copy ci entry */
01634     ci = &ci_entry;
01635 
01636     sym = TOPN(i);
01637 
01638     if (SYMBOL_P(sym)) {
01639         ci->mid = SYM2ID(sym);
01640     }
01641     else if (!(ci->mid = rb_check_id(&sym))) {
01642         if (rb_method_basic_definition_p(CLASS_OF(ci->recv), idMethodMissing)) {
01643             VALUE exc = make_no_method_exception(rb_eNoMethodError, NULL, ci->recv, rb_long2int(ci->argc), &TOPN(i));
01644             rb_exc_raise(exc);
01645         }
01646         ci->mid = rb_to_id(sym);
01647     }
01648 
01649     /* shift arguments */
01650     if (i > 0) {
01651         MEMMOVE(&TOPN(i), &TOPN(i-1), VALUE, i);
01652     }
01653     ci->me =
01654         rb_method_entry_without_refinements(CLASS_OF(ci->recv),
01655                                             ci->mid, &ci->defined_class);
01656     ci->argc -= 1;
01657     DEC_SP(1);
01658 
01659     ci->flag = VM_CALL_FCALL | VM_CALL_OPT_SEND;
01660 
01661     return vm_call_method(th, reg_cfp, ci);
01662 }
01663 
01664 static VALUE
01665 vm_call_opt_call(rb_thread_t *th, rb_control_frame_t *cfp, rb_call_info_t *ci)
01666 {
01667     rb_proc_t *proc;
01668     int argc = ci->argc;
01669     VALUE *argv = ALLOCA_N(VALUE, argc);
01670     GetProcPtr(ci->recv, proc);
01671     MEMCPY(argv, cfp->sp - argc, VALUE, argc);
01672     cfp->sp -= argc + 1;
01673 
01674     return rb_vm_invoke_proc(th, proc, argc, argv, ci->blockptr);
01675 }
01676 
01677 static VALUE
01678 vm_call_method_missing(rb_thread_t *th, rb_control_frame_t *reg_cfp, rb_call_info_t *ci)
01679 {
01680     VALUE *argv = STACK_ADDR_FROM_TOP(ci->argc);
01681     rb_call_info_t ci_entry;
01682 
01683     ci_entry.flag = VM_CALL_FCALL | VM_CALL_OPT_SEND;
01684     ci_entry.argc = ci->argc+1;
01685     ci_entry.mid = idMethodMissing;
01686     ci_entry.blockptr = ci->blockptr;
01687     ci_entry.recv = ci->recv;
01688     ci_entry.me = rb_method_entry(CLASS_OF(ci_entry.recv), idMethodMissing, &ci_entry.defined_class);
01689 
01690     /* shift arguments: m(a, b, c) #=> method_missing(:m, a, b, c) */
01691     CHECK_VM_STACK_OVERFLOW(reg_cfp, 1);
01692     if (ci->argc > 0) {
01693         MEMMOVE(argv+1, argv, VALUE, ci->argc);
01694     }
01695     argv[0] = ID2SYM(ci->mid);
01696     INC_SP(1);
01697 
01698     th->method_missing_reason = ci->aux.missing_reason;
01699     return vm_call_method(th, reg_cfp, &ci_entry);
01700 }
01701 
01702 static inline VALUE
01703 find_refinement(VALUE refinements, VALUE klass)
01704 {
01705     if (NIL_P(refinements)) {
01706         return Qnil;
01707     }
01708     return rb_hash_lookup(refinements, klass);
01709 }
01710 
01711 static int rb_method_definition_eq(const rb_method_definition_t *d1, const rb_method_definition_t *d2);
01712 static VALUE vm_call_super_method(rb_thread_t *th, rb_control_frame_t *reg_cfp, rb_call_info_t *ci);
01713 
01714 static rb_control_frame_t *
01715 current_method_entry(rb_thread_t *th, rb_control_frame_t *cfp)
01716 {
01717     rb_control_frame_t *top_cfp = cfp;
01718 
01719     if (cfp->iseq && cfp->iseq->type == ISEQ_TYPE_BLOCK) {
01720         rb_iseq_t *local_iseq = cfp->iseq->local_iseq;
01721         do {
01722             cfp = RUBY_VM_PREVIOUS_CONTROL_FRAME(cfp);
01723             if (RUBY_VM_CONTROL_FRAME_STACK_OVERFLOW_P(th, cfp)) {
01724                 /* TODO: orphan block */
01725                 return top_cfp;
01726             }
01727         } while (cfp->iseq != local_iseq);
01728     }
01729     return cfp;
01730 }
01731 
01732 static
01733 #ifdef _MSC_VER
01734 __forceinline
01735 #else
01736 inline
01737 #endif
01738 VALUE
01739 vm_call_method(rb_thread_t *th, rb_control_frame_t *cfp, rb_call_info_t *ci)
01740 {
01741     int enable_fastpath = 1;
01742     rb_call_info_t ci_temp;
01743 
01744   start_method_dispatch:
01745     if (ci->me != 0) {
01746         if ((ci->me->flag == 0)) {
01747             VALUE klass;
01748 
01749           normal_method_dispatch:
01750             switch (ci->me->def->type) {
01751               case VM_METHOD_TYPE_ISEQ:{
01752                 CI_SET_FASTPATH(ci, vm_call_iseq_setup, enable_fastpath);
01753                 return vm_call_iseq_setup(th, cfp, ci);
01754               }
01755               case VM_METHOD_TYPE_NOTIMPLEMENTED:
01756               case VM_METHOD_TYPE_CFUNC:
01757                 CI_SET_FASTPATH(ci, vm_call_cfunc, enable_fastpath);
01758                 return vm_call_cfunc(th, cfp, ci);
01759               case VM_METHOD_TYPE_ATTRSET:{
01760                 rb_check_arity(ci->argc, 1, 1);
01761                 ci->aux.index = 0;
01762                 CI_SET_FASTPATH(ci, vm_call_attrset, enable_fastpath && !(ci->flag & VM_CALL_ARGS_SPLAT));
01763                 return vm_call_attrset(th, cfp, ci);
01764               }
01765               case VM_METHOD_TYPE_IVAR:{
01766                 rb_check_arity(ci->argc, 0, 0);
01767                 ci->aux.index = 0;
01768                 CI_SET_FASTPATH(ci, vm_call_ivar, enable_fastpath && !(ci->flag & VM_CALL_ARGS_SPLAT));
01769                 return vm_call_ivar(th, cfp, ci);
01770               }
01771               case VM_METHOD_TYPE_MISSING:{
01772                 ci->aux.missing_reason = 0;
01773                 CI_SET_FASTPATH(ci, vm_call_method_missing, enable_fastpath);
01774                 return vm_call_method_missing(th, cfp, ci);
01775               }
01776               case VM_METHOD_TYPE_BMETHOD:{
01777                 CI_SET_FASTPATH(ci, vm_call_bmethod, enable_fastpath);
01778                 return vm_call_bmethod(th, cfp, ci);
01779               }
01780               case VM_METHOD_TYPE_ZSUPER:{
01781                 klass = ci->me->klass;
01782                 klass = RCLASS_ORIGIN(klass);
01783               zsuper_method_dispatch:
01784                 klass = RCLASS_SUPER(klass);
01785                 ci_temp = *ci;
01786                 ci = &ci_temp;
01787 
01788                 ci->me = rb_method_entry(klass, ci->mid, &ci->defined_class);
01789 
01790                 if (ci->me != 0) {
01791                     goto normal_method_dispatch;
01792                 }
01793                 else {
01794                     goto start_method_dispatch;
01795                 }
01796               }
01797               case VM_METHOD_TYPE_OPTIMIZED:{
01798                 switch (ci->me->def->body.optimize_type) {
01799                   case OPTIMIZED_METHOD_TYPE_SEND:
01800                     CI_SET_FASTPATH(ci, vm_call_opt_send, enable_fastpath);
01801                     return vm_call_opt_send(th, cfp, ci);
01802                   case OPTIMIZED_METHOD_TYPE_CALL:
01803                     CI_SET_FASTPATH(ci, vm_call_opt_call, enable_fastpath);
01804                     return vm_call_opt_call(th, cfp, ci);
01805                   default:
01806                     rb_bug("vm_call_method: unsupported optimized method type (%d)",
01807                            ci->me->def->body.optimize_type);
01808                 }
01809                 break;
01810               }
01811               case VM_METHOD_TYPE_UNDEF:
01812                 break;
01813               case VM_METHOD_TYPE_REFINED:{
01814                 NODE *cref = rb_vm_get_cref(cfp->iseq, cfp->ep);
01815                 VALUE refinements = cref ? cref->nd_refinements : Qnil;
01816                 VALUE refinement, defined_class;
01817                 rb_method_entry_t *me;
01818 
01819                 refinement = find_refinement(refinements,
01820                                              ci->defined_class);
01821                 if (NIL_P(refinement)) {
01822                     goto no_refinement_dispatch;
01823                 }
01824                 me = rb_method_entry(refinement, ci->mid, &defined_class);
01825                 if (me) {
01826                     if (ci->call == vm_call_super_method) {
01827                         rb_control_frame_t *top_cfp = current_method_entry(th, cfp);
01828                         if (top_cfp->me &&
01829                             rb_method_definition_eq(me->def, top_cfp->me->def)) {
01830                             goto no_refinement_dispatch;
01831                         }
01832                     }
01833                     ci->me = me;
01834                     ci->defined_class = defined_class;
01835                     if (me->def->type != VM_METHOD_TYPE_REFINED) {
01836                         goto normal_method_dispatch;
01837                     }
01838                 }
01839 
01840               no_refinement_dispatch:
01841                 if (ci->me->def->body.orig_me) {
01842                     ci->me = ci->me->def->body.orig_me;
01843                     if (UNDEFINED_METHOD_ENTRY_P(ci->me)) {
01844                         ci->me = 0;
01845                         goto start_method_dispatch;
01846                     }
01847                     else {
01848                         goto normal_method_dispatch;
01849                     }
01850                 }
01851                 else {
01852                     klass = ci->me->klass;
01853                     goto zsuper_method_dispatch;
01854                 }
01855               }
01856             }
01857             rb_bug("vm_call_method: unsupported method type (%d)", ci->me->def->type);
01858         }
01859         else {
01860             int noex_safe;
01861             if (!(ci->flag & VM_CALL_FCALL) && (ci->me->flag & NOEX_MASK) & NOEX_PRIVATE) {
01862                 int stat = NOEX_PRIVATE;
01863 
01864                 if (ci->flag & VM_CALL_VCALL) {
01865                     stat |= NOEX_VCALL;
01866                 }
01867                 ci->aux.missing_reason = stat;
01868                 CI_SET_FASTPATH(ci, vm_call_method_missing, 1);
01869                 return vm_call_method_missing(th, cfp, ci);
01870             }
01871             else if (!(ci->flag & VM_CALL_OPT_SEND) && (ci->me->flag & NOEX_MASK) & NOEX_PROTECTED) {
01872                 enable_fastpath = 0;
01873                 if (!rb_obj_is_kind_of(cfp->self, ci->defined_class)) {
01874                     ci->aux.missing_reason = NOEX_PROTECTED;
01875                     return vm_call_method_missing(th, cfp, ci);
01876                 }
01877                 else {
01878                     goto normal_method_dispatch;
01879                 }
01880             }
01881             else if ((noex_safe = NOEX_SAFE(ci->me->flag)) > th->safe_level && (noex_safe > 2)) {
01882                 rb_raise(rb_eSecurityError, "calling insecure method: %s", rb_id2name(ci->mid));
01883             }
01884             else {
01885                 goto normal_method_dispatch;
01886             }
01887         }
01888     }
01889     else {
01890         /* method missing */
01891         int stat = 0;
01892         if (ci->flag & VM_CALL_VCALL) {
01893             stat |= NOEX_VCALL;
01894         }
01895         if (ci->flag & VM_CALL_SUPER) {
01896             stat |= NOEX_SUPER;
01897         }
01898         if (ci->mid == idMethodMissing) {
01899             rb_control_frame_t *reg_cfp = cfp;
01900             VALUE *argv = STACK_ADDR_FROM_TOP(ci->argc);
01901             rb_raise_method_missing(th, ci->argc, argv, ci->recv, stat);
01902         }
01903         else {
01904             ci->aux.missing_reason = stat;
01905             CI_SET_FASTPATH(ci, vm_call_method_missing, 1);
01906             return vm_call_method_missing(th, cfp, ci);
01907         }
01908     }
01909 
01910     rb_bug("vm_call_method: unreachable");
01911 }
01912 
01913 static VALUE
01914 vm_call_general(rb_thread_t *th, rb_control_frame_t *reg_cfp, rb_call_info_t *ci)
01915 {
01916     return vm_call_method(th, reg_cfp, ci);
01917 }
01918 
01919 static VALUE
01920 vm_call_super_method(rb_thread_t *th, rb_control_frame_t *reg_cfp, rb_call_info_t *ci)
01921 {
01922     return vm_call_method(th, reg_cfp, ci);
01923 }
01924 
01925 /* super */
01926 
01927 static inline VALUE
01928 vm_search_normal_superclass(VALUE klass)
01929 {
01930     if (BUILTIN_TYPE(klass) == T_ICLASS &&
01931         FL_TEST(RBASIC(klass)->klass, RMODULE_IS_REFINEMENT)) {
01932         klass = RBASIC(klass)->klass;
01933     }
01934     klass = RCLASS_ORIGIN(klass);
01935     return RCLASS_SUPER(klass);
01936 }
01937 
01938 static void
01939 vm_super_outside(void)
01940 {
01941     rb_raise(rb_eNoMethodError, "super called outside of method");
01942 }
01943 
01944 static int
01945 vm_search_superclass(rb_control_frame_t *reg_cfp, rb_iseq_t *iseq, VALUE sigval, rb_call_info_t *ci)
01946 {
01947     while (iseq && !iseq->klass) {
01948         iseq = iseq->parent_iseq;
01949     }
01950 
01951     if (iseq == 0) {
01952         return -1;
01953     }
01954 
01955     ci->mid = iseq->defined_method_id;
01956 
01957     if (iseq != iseq->local_iseq) {
01958         /* defined by Module#define_method() */
01959         rb_control_frame_t *lcfp = GET_CFP();
01960 
01961         if (!sigval) {
01962             /* zsuper */
01963             return -2;
01964         }
01965 
01966         while (lcfp->iseq != iseq) {
01967             rb_thread_t *th = GET_THREAD();
01968             VALUE *tep = VM_EP_PREV_EP(lcfp->ep);
01969             while (1) {
01970                 lcfp = RUBY_VM_PREVIOUS_CONTROL_FRAME(lcfp);
01971                 if (RUBY_VM_CONTROL_FRAME_STACK_OVERFLOW_P(th, lcfp)) {
01972                     return -1;
01973                 }
01974                 if (lcfp->ep == tep) {
01975                     break;
01976                 }
01977             }
01978         }
01979 
01980         /* temporary measure for [Bug #2420] [Bug #3136] */
01981         if (!lcfp->me) {
01982             return -1;
01983         }
01984 
01985         ci->mid = lcfp->me->def->original_id;
01986         ci->klass = vm_search_normal_superclass(lcfp->klass);
01987     }
01988     else {
01989         ci->klass = vm_search_normal_superclass(reg_cfp->klass);
01990     }
01991 
01992     return 0;
01993 }
01994 
01995 static void
01996 vm_search_super_method(rb_thread_t *th, rb_control_frame_t *reg_cfp, rb_call_info_t *ci)
01997 {
01998     VALUE current_defined_class;
01999     rb_iseq_t *iseq = GET_ISEQ();
02000     VALUE sigval = TOPN(ci->argc);
02001 
02002     current_defined_class = GET_CFP()->klass;
02003     if (NIL_P(current_defined_class)) {
02004         vm_super_outside();
02005     }
02006 
02007     if (!NIL_P(RCLASS_REFINED_CLASS(current_defined_class))) {
02008         current_defined_class = RCLASS_REFINED_CLASS(current_defined_class);
02009     }
02010 
02011     if (!FL_TEST(current_defined_class, RMODULE_INCLUDED_INTO_REFINEMENT) &&
02012         !rb_obj_is_kind_of(ci->recv, current_defined_class)) {
02013         VALUE m = RB_TYPE_P(current_defined_class, T_ICLASS) ?
02014             RBASIC(current_defined_class)->klass : current_defined_class;
02015 
02016         rb_raise(rb_eTypeError,
02017                  "self has wrong type to call super in this context: "
02018                  "%s (expected %s)",
02019                  rb_obj_classname(ci->recv), rb_class2name(m));
02020     }
02021 
02022     switch (vm_search_superclass(GET_CFP(), iseq, sigval, ci)) {
02023       case -1:
02024         vm_super_outside();
02025       case -2:
02026         rb_raise(rb_eRuntimeError,
02027                  "implicit argument passing of super from method defined"
02028                  " by define_method() is not supported."
02029                  " Specify all arguments explicitly.");
02030     }
02031 
02032     /* TODO: use inline cache */
02033     ci->me = rb_method_entry(ci->klass, ci->mid, &ci->defined_class);
02034     ci->call = vm_call_super_method;
02035 
02036     while (iseq && !iseq->klass) {
02037         iseq = iseq->parent_iseq;
02038     }
02039 
02040     if (ci->me && ci->me->def->type == VM_METHOD_TYPE_ISEQ && ci->me->def->body.iseq == iseq) {
02041         ci->klass = RCLASS_SUPER(ci->defined_class);
02042         ci->me = rb_method_entry(ci->klass, ci->mid, &ci->defined_class);
02043     }
02044 }
02045 
02046 /* yield */
02047 
02048 static inline int
02049 block_proc_is_lambda(const VALUE procval)
02050 {
02051     rb_proc_t *proc;
02052 
02053     if (procval) {
02054         GetProcPtr(procval, proc);
02055         return proc->is_lambda;
02056     }
02057     else {
02058         return 0;
02059     }
02060 }
02061 
02062 static inline VALUE
02063 vm_yield_with_cfunc(rb_thread_t *th, const rb_block_t *block,
02064                     VALUE self, int argc, const VALUE *argv,
02065                     const rb_block_t *blockargptr)
02066 {
02067     NODE *ifunc = (NODE *) block->iseq;
02068     VALUE val, arg, blockarg;
02069     int lambda = block_proc_is_lambda(block->proc);
02070 
02071     if (lambda) {
02072         arg = rb_ary_new4(argc, argv);
02073     }
02074     else if (argc == 0) {
02075         arg = Qnil;
02076     }
02077     else {
02078         arg = argv[0];
02079     }
02080 
02081     if (blockargptr) {
02082         if (blockargptr->proc) {
02083             blockarg = blockargptr->proc;
02084         }
02085         else {
02086             blockarg = rb_vm_make_proc(th, blockargptr, rb_cProc);
02087         }
02088     }
02089     else {
02090         blockarg = Qnil;
02091     }
02092 
02093     vm_push_frame(th, (rb_iseq_t *)ifunc, VM_FRAME_MAGIC_IFUNC, self,
02094                   0, VM_ENVVAL_PREV_EP_PTR(block->ep), 0,
02095                   th->cfp->sp, 1, 0);
02096 
02097     val = (*ifunc->nd_cfnc) (arg, ifunc->nd_tval, argc, argv, blockarg);
02098 
02099     th->cfp++;
02100     return val;
02101 }
02102 
02103 
02104 /*--
02105  * @brief on supplied all of optional, rest and post parameters.
02106  * @pre iseq is block style (not lambda style)
02107  */
02108 static inline int
02109 vm_yield_setup_block_args_complex(rb_thread_t *th, const rb_iseq_t *iseq,
02110                                   int argc, VALUE *argv)
02111 {
02112     rb_num_t opt_pc = 0;
02113     int i;
02114     const int m = iseq->argc;
02115     const int r = iseq->arg_rest;
02116     int len = iseq->arg_post_len;
02117     int start = iseq->arg_post_start;
02118     int rsize = argc > m ? argc - m : 0;    /* # of arguments which did not consumed yet */
02119     int psize = rsize > len ? len : rsize;  /* # of post arguments */
02120     int osize = 0;  /* # of opt arguments */
02121     VALUE ary;
02122 
02123     /* reserves arguments for post parameters */
02124     rsize -= psize;
02125 
02126     if (iseq->arg_opts) {
02127         const int opts = iseq->arg_opts - 1;
02128         if (rsize > opts) {
02129             osize = opts;
02130             opt_pc = iseq->arg_opt_table[opts];
02131         }
02132         else {
02133             osize = rsize;
02134             opt_pc = iseq->arg_opt_table[rsize];
02135         }
02136     }
02137     rsize -= osize;
02138 
02139     if (0) {
02140         printf(" argc: %d\n", argc);
02141         printf("  len: %d\n", len);
02142         printf("start: %d\n", start);
02143         printf("rsize: %d\n", rsize);
02144     }
02145 
02146     if (r == -1) {
02147         /* copy post argument */
02148         MEMMOVE(&argv[start], &argv[m+osize], VALUE, psize);
02149     }
02150     else {
02151         ary = rb_ary_new4(rsize, &argv[r]);
02152 
02153         /* copy post argument */
02154         MEMMOVE(&argv[start], &argv[m+rsize+osize], VALUE, psize);
02155         argv[r] = ary;
02156     }
02157 
02158     for (i=psize; i<len; i++) {
02159         argv[start + i] = Qnil;
02160     }
02161 
02162     return (int)opt_pc;
02163 }
02164 
02165 static inline int
02166 vm_yield_setup_block_args(rb_thread_t *th, const rb_iseq_t * iseq,
02167                           int orig_argc, VALUE *argv,
02168                           const rb_block_t *blockptr)
02169 {
02170     int i;
02171     int argc = orig_argc;
02172     const int m = iseq->argc;
02173     VALUE ary, arg0;
02174     VALUE keyword_hash = Qnil;
02175     int opt_pc = 0;
02176 
02177     th->mark_stack_len = argc;
02178 
02179     /*
02180      * yield [1, 2]
02181      *  => {|a|} => a = [1, 2]
02182      *  => {|a, b|} => a, b = [1, 2]
02183      */
02184     arg0 = argv[0];
02185     if (!(iseq->arg_simple & 0x02) &&                           /* exclude {|a|} */
02186         ((m + iseq->arg_post_len) > 0 ||                        /* positional arguments exist */
02187          iseq->arg_opts > 2 ||                                  /* multiple optional arguments exist */
02188          iseq->arg_keyword != -1 ||                             /* any keyword arguments */
02189          0) &&
02190         argc == 1 && !NIL_P(ary = rb_check_array_type(arg0))) { /* rhs is only an array */
02191         th->mark_stack_len = argc = RARRAY_LENINT(ary);
02192 
02193         CHECK_VM_STACK_OVERFLOW(th->cfp, argc);
02194 
02195         MEMCPY(argv, RARRAY_PTR(ary), VALUE, argc);
02196     }
02197     else {
02198         /* vm_push_frame current argv is at the top of sp because vm_invoke_block
02199          * set sp at the first element of argv.
02200          * Therefore when rb_check_array_type(arg0) called to_ary and called to_ary
02201          * or method_missing run vm_push_frame, it initializes local variables.
02202          * see also https://bugs.ruby-lang.org/issues/8484
02203          */
02204         argv[0] = arg0;
02205     }
02206 
02207     /* keyword argument */
02208     if (iseq->arg_keyword != -1) {
02209         argc = vm_callee_setup_keyword_arg(iseq, argc, m, argv, &keyword_hash);
02210     }
02211 
02212     for (i=argc; i<m; i++) {
02213         argv[i] = Qnil;
02214     }
02215 
02216     if (iseq->arg_rest == -1 && iseq->arg_opts == 0) {
02217         const int arg_size = iseq->arg_size;
02218         if (arg_size < argc) {
02219             /*
02220              * yield 1, 2
02221              * => {|a|} # truncate
02222              */
02223             th->mark_stack_len = argc = arg_size;
02224         }
02225     }
02226     else {
02227         int r = iseq->arg_rest;
02228 
02229         if (iseq->arg_post_len ||
02230             iseq->arg_opts) { /* TODO: implement simple version for (iseq->arg_post_len==0 && iseq->arg_opts > 0) */
02231             opt_pc = vm_yield_setup_block_args_complex(th, iseq, argc, argv);
02232         }
02233         else {
02234             if (argc < r) {
02235                 /* yield 1
02236                  * => {|a, b, *r|}
02237                  */
02238                 for (i=argc; i<r; i++) {
02239                     argv[i] = Qnil;
02240                 }
02241                 argv[r] = rb_ary_new();
02242             }
02243             else {
02244                 argv[r] = rb_ary_new4(argc-r, &argv[r]);
02245             }
02246         }
02247 
02248         th->mark_stack_len = iseq->arg_size;
02249     }
02250 
02251     /* keyword argument */
02252     if (iseq->arg_keyword != -1) {
02253         argv[iseq->arg_keyword] = keyword_hash;
02254     }
02255 
02256     /* {|&b|} */
02257     if (iseq->arg_block != -1) {
02258         VALUE procval = Qnil;
02259 
02260         if (blockptr) {
02261             if (blockptr->proc == 0) {
02262                 procval = rb_vm_make_proc(th, blockptr, rb_cProc);
02263             }
02264             else {
02265                 procval = blockptr->proc;
02266             }
02267         }
02268 
02269         argv[iseq->arg_block] = procval;
02270     }
02271 
02272     th->mark_stack_len = 0;
02273     return opt_pc;
02274 }
02275 
02276 static inline int
02277 vm_yield_setup_args(rb_thread_t * const th, const rb_iseq_t *iseq,
02278                     int argc, VALUE *argv, const rb_block_t *blockptr, int lambda)
02279 {
02280     if (0) { /* for debug */
02281         printf("     argc: %d\n", argc);
02282         printf("iseq argc: %d\n", iseq->argc);
02283         printf("iseq opts: %d\n", iseq->arg_opts);
02284         printf("iseq rest: %d\n", iseq->arg_rest);
02285         printf("iseq post: %d\n", iseq->arg_post_len);
02286         printf("iseq blck: %d\n", iseq->arg_block);
02287         printf("iseq smpl: %d\n", iseq->arg_simple);
02288         printf("   lambda: %s\n", lambda ? "true" : "false");
02289     }
02290 
02291     if (lambda) {
02292         /* call as method */
02293         rb_call_info_t ci_entry;
02294         ci_entry.flag = 0;
02295         ci_entry.argc = argc;
02296         ci_entry.blockptr = (rb_block_t *)blockptr;
02297         VM_CALLEE_SETUP_ARG(th, &ci_entry, iseq, argv, 1);
02298         return ci_entry.aux.opt_pc;
02299     }
02300     else {
02301         return vm_yield_setup_block_args(th, iseq, argc, argv, blockptr);
02302     }
02303 }
02304 
02305 static VALUE
02306 vm_invoke_block(rb_thread_t *th, rb_control_frame_t *reg_cfp, rb_call_info_t *ci)
02307 {
02308     const rb_block_t *block = VM_CF_BLOCK_PTR(reg_cfp);
02309     rb_iseq_t *iseq;
02310     VALUE type = GET_ISEQ()->local_iseq->type;
02311 
02312     if ((type != ISEQ_TYPE_METHOD && type != ISEQ_TYPE_CLASS) || block == 0) {
02313         rb_vm_localjump_error("no block given (yield)", Qnil, 0);
02314     }
02315     iseq = block->iseq;
02316 
02317     if (UNLIKELY(ci->flag & VM_CALL_ARGS_SPLAT)) {
02318         vm_caller_setup_args(th, GET_CFP(), ci);
02319     }
02320 
02321     if (BUILTIN_TYPE(iseq) != T_NODE) {
02322         int opt_pc;
02323         const int arg_size = iseq->arg_size;
02324         VALUE * const rsp = GET_SP() - ci->argc;
02325         SET_SP(rsp);
02326 
02327         CHECK_VM_STACK_OVERFLOW(GET_CFP(), iseq->stack_max);
02328         opt_pc = vm_yield_setup_args(th, iseq, ci->argc, rsp, 0, block_proc_is_lambda(block->proc));
02329 
02330         vm_push_frame(th, iseq, VM_FRAME_MAGIC_BLOCK, block->self,
02331                       block->klass,
02332                       VM_ENVVAL_PREV_EP_PTR(block->ep),
02333                       iseq->iseq_encoded + opt_pc,
02334                       rsp + arg_size,
02335                       iseq->local_size - arg_size, 0);
02336 
02337         return Qundef;
02338     }
02339     else {
02340         VALUE val = vm_yield_with_cfunc(th, block, block->self, ci->argc, STACK_ADDR_FROM_TOP(ci->argc), 0);
02341         POPN(ci->argc); /* TODO: should put before C/yield? */
02342         return val;
02343     }
02344 }
02345
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