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vm_insnhelper.c

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00001 /**********************************************************************
00002 
00003   vm_insnhelper.c - instruction helper functions.
00004 
00005   $Author: yugui $
00006 
00007   Copyright (C) 2007 Koichi Sasada
00008 
00009 **********************************************************************/
00010 
00011 /* finish iseq array */
00012 #include "insns.inc"
00013 #include <math.h>
00014 
00015 /* control stack frame */
00016 
00017 #ifndef INLINE
00018 #define INLINE inline
00019 #endif
00020 
00021 static rb_control_frame_t *vm_get_ruby_level_caller_cfp(rb_thread_t *th, rb_control_frame_t *cfp);
00022 
00023 static inline rb_control_frame_t *
00024 vm_push_frame(rb_thread_t * th, const rb_iseq_t * iseq,
00025               VALUE type, VALUE self, VALUE specval,
00026               const VALUE *pc, VALUE *sp, VALUE *lfp,
00027               int local_size)
00028 {
00029     rb_control_frame_t * const cfp = th->cfp - 1;
00030     int i;
00031 
00032     if ((void *)(sp + local_size) >= (void *)cfp) {
00033         rb_exc_raise(sysstack_error);
00034     }
00035     th->cfp = cfp;
00036     /* setup vm value stack */
00037 
00038     /* nil initialize */
00039     for (i=0; i < local_size; i++) {
00040         *sp = Qnil;
00041         sp++;
00042     }
00043 
00044     /* set special val */
00045     *sp = GC_GUARDED_PTR(specval);
00046 
00047     if (lfp == 0) {
00048         lfp = sp;
00049     }
00050 
00051     /* setup vm control frame stack */
00052 
00053     cfp->pc = (VALUE *)pc;
00054     cfp->sp = sp + 1;
00055     cfp->bp = sp + 1;
00056     cfp->iseq = (rb_iseq_t *) iseq;
00057     cfp->flag = type;
00058     cfp->self = self;
00059     cfp->lfp = lfp;
00060     cfp->dfp = sp;
00061     cfp->block_iseq = 0;
00062     cfp->proc = 0;
00063     cfp->me = 0;
00064 
00065 #define COLLECT_PROFILE 0
00066 #if COLLECT_PROFILE
00067     cfp->prof_time_self = clock();
00068     cfp->prof_time_chld = 0;
00069 #endif
00070 
00071     if (VMDEBUG == 2) {
00072         SDR();
00073     }
00074 
00075     return cfp;
00076 }
00077 
00078 static inline void
00079 vm_pop_frame(rb_thread_t *th)
00080 {
00081 #if COLLECT_PROFILE
00082     rb_control_frame_t *cfp = th->cfp;
00083 
00084     if (RUBY_VM_NORMAL_ISEQ_P(cfp->iseq)) {
00085         VALUE current_time = clock();
00086         rb_control_frame_t *cfp = th->cfp;
00087         cfp->prof_time_self = current_time - cfp->prof_time_self;
00088         (cfp+1)->prof_time_chld += cfp->prof_time_self;
00089 
00090         cfp->iseq->profile.count++;
00091         cfp->iseq->profile.time_cumu = cfp->prof_time_self;
00092         cfp->iseq->profile.time_self = cfp->prof_time_self - cfp->prof_time_chld;
00093     }
00094     else if (0 /* c method? */) {
00095 
00096     }
00097 #endif
00098     th->cfp = RUBY_VM_PREVIOUS_CONTROL_FRAME(th->cfp);
00099 
00100     if (VMDEBUG == 2) {
00101         SDR();
00102     }
00103 }
00104 
00105 /* method dispatch */
00106 
00107 NORETURN(static void argument_error(const rb_iseq_t *iseq, int miss_argc, int correct_argc));
00108 static void
00109 argument_error(const rb_iseq_t *iseq, int miss_argc, int correct_argc)
00110 {
00111     VALUE mesg = rb_sprintf("wrong number of arguments (%d for %d)", miss_argc, correct_argc);
00112     VALUE exc = rb_exc_new3(rb_eArgError, mesg);
00113     VALUE bt = rb_make_backtrace();
00114     VALUE err_line = 0;
00115 
00116     if (iseq) {
00117         int line_no = 1;
00118 
00119         if (iseq->insn_info_size) {
00120             line_no = iseq->insn_info_table[0].line_no;
00121         }
00122 
00123         err_line = rb_sprintf("%s:%d:in `%s'",
00124                               RSTRING_PTR(iseq->filename),
00125                               line_no, RSTRING_PTR(iseq->name));
00126         rb_funcall(bt, rb_intern("unshift"), 1, err_line);
00127     }
00128 
00129     rb_funcall(exc, rb_intern("set_backtrace"), 1, bt);
00130     rb_exc_raise(exc);
00131 }
00132 
00133 #define VM_CALLEE_SETUP_ARG(ret, th, iseq, orig_argc, orig_argv, block) \
00134     if (LIKELY(iseq->arg_simple & 0x01)) { \
00135         /* simple check */ \
00136         if (orig_argc != iseq->argc) { \
00137             argument_error(iseq, orig_argc, iseq->argc); \
00138         } \
00139         ret = 0; \
00140     } \
00141     else { \
00142         ret = vm_callee_setup_arg_complex(th, iseq, orig_argc, orig_argv, block); \
00143     }
00144 
00145 static inline int
00146 vm_callee_setup_arg_complex(rb_thread_t *th, const rb_iseq_t * iseq,
00147                             int orig_argc, VALUE * orig_argv,
00148                             const rb_block_t **block)
00149 {
00150     const int m = iseq->argc;
00151     int argc = orig_argc;
00152     VALUE *argv = orig_argv;
00153     rb_num_t opt_pc = 0;
00154 
00155     th->mark_stack_len = argc + iseq->arg_size;
00156 
00157     /* mandatory */
00158     if (argc < (m + iseq->arg_post_len)) { /* check with post arg */
00159         argument_error(iseq, argc, m + iseq->arg_post_len);
00160     }
00161 
00162     argv += m;
00163     argc -= m;
00164 
00165     /* post arguments */
00166     if (iseq->arg_post_len) {
00167         if (!(orig_argc < iseq->arg_post_start)) {
00168             VALUE *new_argv = ALLOCA_N(VALUE, argc);
00169             MEMCPY(new_argv, argv, VALUE, argc);
00170             argv = new_argv;
00171         }
00172 
00173         MEMCPY(&orig_argv[iseq->arg_post_start], &argv[argc -= iseq->arg_post_len],
00174                VALUE, iseq->arg_post_len);
00175     }
00176 
00177     /* opt arguments */
00178     if (iseq->arg_opts) {
00179         const int opts = iseq->arg_opts - 1 /* no opt */;
00180 
00181         if (iseq->arg_rest == -1 && argc > opts) {
00182             argument_error(iseq, orig_argc, m + opts + iseq->arg_post_len);
00183         }
00184 
00185         if (argc > opts) {
00186             argc -= opts;
00187             argv += opts;
00188             opt_pc = iseq->arg_opt_table[opts]; /* no opt */
00189         }
00190         else {
00191             int i;
00192             for (i = argc; i<opts; i++) {
00193                 orig_argv[i + m] = Qnil;
00194             }
00195             opt_pc = iseq->arg_opt_table[argc];
00196             argc = 0;
00197         }
00198     }
00199 
00200     /* rest arguments */
00201     if (iseq->arg_rest != -1) {
00202         orig_argv[iseq->arg_rest] = rb_ary_new4(argc, argv);
00203         argc = 0;
00204     }
00205 
00206     /* block arguments */
00207     if (block && iseq->arg_block != -1) {
00208         VALUE blockval = Qnil;
00209         const rb_block_t *blockptr = *block;
00210 
00211         if (argc != 0) {
00212             argument_error(iseq, orig_argc, m + iseq->arg_post_len);
00213         }
00214 
00215         if (blockptr) {
00216             /* make Proc object */
00217             if (blockptr->proc == 0) {
00218                 rb_proc_t *proc;
00219                 blockval = rb_vm_make_proc(th, blockptr, rb_cProc);
00220                 GetProcPtr(blockval, proc);
00221                 *block = &proc->block;
00222             }
00223             else {
00224                 blockval = blockptr->proc;
00225             }
00226         }
00227 
00228         orig_argv[iseq->arg_block] = blockval; /* Proc or nil */
00229     }
00230 
00231     th->mark_stack_len = 0;
00232     return (int)opt_pc;
00233 }
00234 
00235 static inline int
00236 caller_setup_args(const rb_thread_t *th, rb_control_frame_t *cfp, VALUE flag,
00237                   int argc, rb_iseq_t *blockiseq, rb_block_t **block)
00238 {
00239     rb_block_t *blockptr = 0;
00240 
00241     if (block) {
00242         if (flag & VM_CALL_ARGS_BLOCKARG_BIT) {
00243             rb_proc_t *po;
00244             VALUE proc;
00245 
00246             proc = *(--cfp->sp);
00247 
00248             if (proc != Qnil) {
00249                 if (!rb_obj_is_proc(proc)) {
00250                     VALUE b = rb_check_convert_type(proc, T_DATA, "Proc", "to_proc");
00251                     if (NIL_P(b) || !rb_obj_is_proc(b)) {
00252                         rb_raise(rb_eTypeError,
00253                                  "wrong argument type %s (expected Proc)",
00254                                  rb_obj_classname(proc));
00255                     }
00256                     proc = b;
00257                 }
00258                 GetProcPtr(proc, po);
00259                 blockptr = &po->block;
00260                 RUBY_VM_GET_BLOCK_PTR_IN_CFP(cfp)->proc = proc;
00261                 *block = blockptr;
00262             }
00263         }
00264         else if (blockiseq) {
00265             blockptr = RUBY_VM_GET_BLOCK_PTR_IN_CFP(cfp);
00266             blockptr->iseq = blockiseq;
00267             blockptr->proc = 0;
00268             *block = blockptr;
00269         }
00270     }
00271 
00272     /* expand top of stack? */
00273     if (flag & VM_CALL_ARGS_SPLAT_BIT) {
00274         VALUE ary = *(cfp->sp - 1);
00275         VALUE *ptr;
00276         int i;
00277         VALUE tmp = rb_check_convert_type(ary, T_ARRAY, "Array", "to_a");
00278 
00279         if (NIL_P(tmp)) {
00280             /* do nothing */
00281         }
00282         else {
00283             long len = RARRAY_LEN(tmp);
00284             ptr = RARRAY_PTR(tmp);
00285             cfp->sp -= 1;
00286 
00287             CHECK_STACK_OVERFLOW(cfp, len);
00288 
00289             for (i = 0; i < len; i++) {
00290                 *cfp->sp++ = ptr[i];
00291             }
00292             argc += i-1;
00293         }
00294     }
00295 
00296     return argc;
00297 }
00298 
00299 static inline VALUE
00300 call_cfunc(VALUE (*func)(), VALUE recv,
00301            int len, int argc, const VALUE *argv)
00302 {
00303     /* printf("len: %d, argc: %d\n", len, argc); */
00304 
00305     if (len >= 0 && argc != len) {
00306         rb_raise(rb_eArgError, "wrong number of arguments(%d for %d)",
00307                  argc, len);
00308     }
00309 
00310     switch (len) {
00311       case -2:
00312         return (*func) (recv, rb_ary_new4(argc, argv));
00313         break;
00314       case -1:
00315         return (*func) (argc, argv, recv);
00316         break;
00317       case 0:
00318         return (*func) (recv);
00319         break;
00320       case 1:
00321         return (*func) (recv, argv[0]);
00322         break;
00323       case 2:
00324         return (*func) (recv, argv[0], argv[1]);
00325         break;
00326       case 3:
00327         return (*func) (recv, argv[0], argv[1], argv[2]);
00328         break;
00329       case 4:
00330         return (*func) (recv, argv[0], argv[1], argv[2], argv[3]);
00331         break;
00332       case 5:
00333         return (*func) (recv, argv[0], argv[1], argv[2], argv[3], argv[4]);
00334         break;
00335       case 6:
00336         return (*func) (recv, argv[0], argv[1], argv[2], argv[3], argv[4],
00337                         argv[5]);
00338         break;
00339       case 7:
00340         return (*func) (recv, argv[0], argv[1], argv[2], argv[3], argv[4],
00341                         argv[5], argv[6]);
00342         break;
00343       case 8:
00344         return (*func) (recv, argv[0], argv[1], argv[2], argv[3], argv[4],
00345                         argv[5], argv[6], argv[7]);
00346         break;
00347       case 9:
00348         return (*func) (recv, argv[0], argv[1], argv[2], argv[3], argv[4],
00349                         argv[5], argv[6], argv[7], argv[8]);
00350         break;
00351       case 10:
00352         return (*func) (recv, argv[0], argv[1], argv[2], argv[3], argv[4],
00353                         argv[5], argv[6], argv[7], argv[8], argv[9]);
00354         break;
00355       case 11:
00356         return (*func) (recv, argv[0], argv[1], argv[2], argv[3], argv[4],
00357                         argv[5], argv[6], argv[7], argv[8], argv[9],
00358                         argv[10]);
00359         break;
00360       case 12:
00361         return (*func) (recv, argv[0], argv[1], argv[2], argv[3], argv[4],
00362                         argv[5], argv[6], argv[7], argv[8], argv[9],
00363                         argv[10], argv[11]);
00364         break;
00365       case 13:
00366         return (*func) (recv, argv[0], argv[1], argv[2], argv[3], argv[4],
00367                         argv[5], argv[6], argv[7], argv[8], argv[9], argv[10],
00368                         argv[11], argv[12]);
00369         break;
00370       case 14:
00371         return (*func) (recv, argv[0], argv[1], argv[2], argv[3], argv[4],
00372                         argv[5], argv[6], argv[7], argv[8], argv[9], argv[10],
00373                         argv[11], argv[12], argv[13]);
00374         break;
00375       case 15:
00376         return (*func) (recv, argv[0], argv[1], argv[2], argv[3], argv[4],
00377                         argv[5], argv[6], argv[7], argv[8], argv[9], argv[10],
00378                         argv[11], argv[12], argv[13], argv[14]);
00379         break;
00380       default:
00381         rb_raise(rb_eArgError, "too many arguments(%d)", len);
00382         return Qundef; /* not reached */
00383     }
00384 }
00385 
00386 static inline VALUE
00387 vm_call_cfunc(rb_thread_t *th, rb_control_frame_t *reg_cfp,
00388               int num, VALUE recv, const rb_block_t *blockptr,
00389               const rb_method_entry_t *me)
00390 {
00391     VALUE val = 0;
00392     const rb_method_definition_t *def = me->def;
00393     rb_control_frame_t *cfp;
00394 
00395     EXEC_EVENT_HOOK(th, RUBY_EVENT_C_CALL, recv, me->called_id, me->klass);
00396 
00397     cfp = vm_push_frame(th, 0, VM_FRAME_MAGIC_CFUNC,
00398                         recv, (VALUE) blockptr, 0, reg_cfp->sp, 0, 1);
00399     cfp->me = me;
00400     reg_cfp->sp -= num + 1;
00401 
00402     val = call_cfunc(def->body.cfunc.func, recv, (int)def->body.cfunc.argc, num, reg_cfp->sp + 1);
00403 
00404     if (reg_cfp != th->cfp + 1) {
00405         rb_bug("cfp consistency error - send");
00406     }
00407 
00408     vm_pop_frame(th);
00409 
00410     EXEC_EVENT_HOOK(th, RUBY_EVENT_C_RETURN, recv, me->called_id, me->klass);
00411 
00412     return val;
00413 }
00414 
00415 static inline VALUE
00416 vm_call_bmethod(rb_thread_t *th, VALUE recv, int argc, const VALUE *argv,
00417                 const rb_block_t *blockptr, const rb_method_entry_t *me)
00418 {
00419     rb_proc_t *proc;
00420     VALUE val;
00421 
00422     /* control block frame */
00423     th->passed_me = me;
00424 
00425     GetProcPtr(me->def->body.proc, proc);
00426     val = rb_vm_invoke_proc(th, proc, recv, argc, argv, blockptr);
00427     return val;
00428 }
00429 
00430 static inline void
00431 vm_method_missing_args(rb_thread_t *th, VALUE *argv,
00432                        int num, const rb_block_t *blockptr, int opt)
00433 {
00434     rb_control_frame_t * const reg_cfp = th->cfp;
00435     MEMCPY(argv, STACK_ADDR_FROM_TOP(num + 1), VALUE, num + 1);
00436     th->method_missing_reason = opt;
00437     th->passed_block = blockptr;
00438     POPN(num + 1);
00439 }
00440 
00441 static inline VALUE
00442 vm_method_missing(rb_thread_t *th, ID id, VALUE recv,
00443                   int num, const rb_block_t *blockptr, int opt)
00444 {
00445     VALUE *argv = ALLOCA_N(VALUE, num + 1);
00446     vm_method_missing_args(th, argv, num, blockptr, opt);
00447     argv[0] = ID2SYM(id);
00448     return rb_funcall2(recv, idMethodMissing, num + 1, argv);
00449 }
00450 
00451 static inline void
00452 vm_setup_method(rb_thread_t *th, rb_control_frame_t *cfp,
00453                 VALUE recv, int argc, const rb_block_t *blockptr, VALUE flag,
00454                 const rb_method_entry_t *me)
00455 {
00456     int opt_pc, i;
00457     VALUE *sp, *rsp = cfp->sp - argc;
00458     rb_iseq_t *iseq = me->def->body.iseq;
00459 
00460     VM_CALLEE_SETUP_ARG(opt_pc, th, iseq, argc, rsp, &blockptr);
00461 
00462     /* stack overflow check */
00463     CHECK_STACK_OVERFLOW(cfp, iseq->stack_max);
00464 
00465     sp = rsp + iseq->arg_size;
00466 
00467     if (LIKELY(!(flag & VM_CALL_TAILCALL_BIT))) {
00468         if (0) printf("local_size: %d, arg_size: %d\n",
00469                       iseq->local_size, iseq->arg_size);
00470 
00471         /* clear local variables */
00472         for (i = 0; i < iseq->local_size - iseq->arg_size; i++) {
00473             *sp++ = Qnil;
00474         }
00475 
00476         vm_push_frame(th, iseq,
00477                       VM_FRAME_MAGIC_METHOD, recv, (VALUE) blockptr,
00478                       iseq->iseq_encoded + opt_pc, sp, 0, 0);
00479 
00480         cfp->sp = rsp - 1 /* recv */;
00481     }
00482     else {
00483         VALUE *p_rsp;
00484         th->cfp++; /* pop cf */
00485         p_rsp = th->cfp->sp;
00486 
00487         /* copy arguments */
00488         for (i=0; i < (sp - rsp); i++) {
00489             p_rsp[i] = rsp[i];
00490         }
00491 
00492         sp -= rsp - p_rsp;
00493 
00494         /* clear local variables */
00495         for (i = 0; i < iseq->local_size - iseq->arg_size; i++) {
00496             *sp++ = Qnil;
00497         }
00498 
00499         vm_push_frame(th, iseq,
00500                       VM_FRAME_MAGIC_METHOD, recv, (VALUE) blockptr,
00501                       iseq->iseq_encoded + opt_pc, sp, 0, 0);
00502     }
00503 }
00504 
00505 static inline VALUE
00506 vm_call_method(rb_thread_t *th, rb_control_frame_t *cfp,
00507                int num, const rb_block_t *blockptr, VALUE flag,
00508                ID id, const rb_method_entry_t *me, VALUE recv)
00509 {
00510     VALUE val;
00511 
00512   start_method_dispatch:
00513 
00514     if (me != 0) {
00515         if ((me->flag == 0)) {
00516           normal_method_dispatch:
00517             switch (me->def->type) {
00518               case VM_METHOD_TYPE_ISEQ:{
00519                 vm_setup_method(th, cfp, recv, num, blockptr, flag, me);
00520                 return Qundef;
00521               }
00522               case VM_METHOD_TYPE_NOTIMPLEMENTED:
00523               case VM_METHOD_TYPE_CFUNC:{
00524                 val = vm_call_cfunc(th, cfp, num, recv, blockptr, me);
00525                 break;
00526               }
00527               case VM_METHOD_TYPE_ATTRSET:{
00528                 if (num != 1) {
00529                     rb_raise(rb_eArgError, "wrong number of arguments (%d for 1)", num);
00530                 }
00531                 val = rb_ivar_set(recv, me->def->body.attr.id, *(cfp->sp - 1));
00532                 cfp->sp -= 2;
00533                 break;
00534               }
00535               case VM_METHOD_TYPE_IVAR:{
00536                 if (num != 0) {
00537                     rb_raise(rb_eArgError, "wrong number of arguments (%d for 0)", num);
00538                 }
00539                 val = rb_attr_get(recv, me->def->body.attr.id);
00540                 cfp->sp -= 1;
00541                 break;
00542               }
00543               case VM_METHOD_TYPE_MISSING:{
00544                 VALUE *argv = ALLOCA_N(VALUE, num+1);
00545                 argv[0] = ID2SYM(me->def->original_id);
00546                 MEMCPY(argv+1, cfp->sp - num, VALUE, num);
00547                 cfp->sp += - num - 1;
00548                 val = rb_funcall2(recv, rb_intern("method_missing"), num+1, argv);
00549                 break;
00550               }
00551               case VM_METHOD_TYPE_BMETHOD:{
00552                 VALUE *argv = ALLOCA_N(VALUE, num);
00553                 MEMCPY(argv, cfp->sp - num, VALUE, num);
00554                 cfp->sp += - num - 1;
00555                 val = vm_call_bmethod(th, recv, num, argv, blockptr, me);
00556                 break;
00557               }
00558               case VM_METHOD_TYPE_ZSUPER:{
00559                 VALUE klass = RCLASS_SUPER(me->klass);
00560                 me = rb_method_entry(klass, id);
00561 
00562                 if (me != 0) {
00563                     goto normal_method_dispatch;
00564                 }
00565                 else {
00566                     goto start_method_dispatch;
00567                 }
00568               }
00569               case VM_METHOD_TYPE_OPTIMIZED:{
00570                 switch (me->def->body.optimize_type) {
00571                   case OPTIMIZED_METHOD_TYPE_SEND: {
00572                     rb_control_frame_t *reg_cfp = cfp;
00573                     rb_num_t i = num - 1;
00574                     VALUE sym;
00575 
00576                     if (num == 0) {
00577                         rb_raise(rb_eArgError, "no method name given");
00578                     }
00579 
00580                     sym = TOPN(i);
00581                     id = SYMBOL_P(sym) ? SYM2ID(sym) : rb_to_id(sym);
00582                     /* shift arguments */
00583                     if (i > 0) {
00584                         MEMMOVE(&TOPN(i), &TOPN(i-1), VALUE, i);
00585                     }
00586                     me = rb_method_entry(CLASS_OF(recv), id);
00587                     num -= 1;
00588                     DEC_SP(1);
00589                     flag |= VM_CALL_FCALL_BIT | VM_CALL_OPT_SEND_BIT;
00590 
00591                     goto start_method_dispatch;
00592                   }
00593                   case OPTIMIZED_METHOD_TYPE_CALL: {
00594                     rb_proc_t *proc;
00595                     int argc = num;
00596                     VALUE *argv = ALLOCA_N(VALUE, num);
00597                     GetProcPtr(recv, proc);
00598                     MEMCPY(argv, cfp->sp - num, VALUE, num);
00599                     cfp->sp -= num + 1;
00600 
00601                     val = rb_vm_invoke_proc(th, proc, proc->block.self, argc, argv, blockptr);
00602                     break;
00603                   }
00604                   default:
00605                     rb_bug("eval_invoke_method: unsupported optimized method type (%d)",
00606                            me->def->body.optimize_type);
00607                 }
00608                 break;
00609               }
00610               default:{
00611                 rb_bug("eval_invoke_method: unsupported method type (%d)", me->def->type);
00612                 break;
00613               }
00614             }
00615         }
00616         else {
00617             int noex_safe;
00618 
00619             if (!(flag & VM_CALL_FCALL_BIT) &&
00620                 (me->flag & NOEX_MASK) & NOEX_PRIVATE) {
00621                 int stat = NOEX_PRIVATE;
00622 
00623                 if (flag & VM_CALL_VCALL_BIT) {
00624                     stat |= NOEX_VCALL;
00625                 }
00626                 val = vm_method_missing(th, id, recv, num, blockptr, stat);
00627             }
00628             else if (!(flag & VM_CALL_OPT_SEND_BIT) && (me->flag & NOEX_MASK) & NOEX_PROTECTED) {
00629                 VALUE defined_class = me->klass;
00630 
00631                 if (TYPE(defined_class) == T_ICLASS) {
00632                     defined_class = RBASIC(defined_class)->klass;
00633                 }
00634 
00635                 if (!rb_obj_is_kind_of(cfp->self, defined_class)) {
00636                     val = vm_method_missing(th, id, recv, num, blockptr, NOEX_PROTECTED);
00637                 }
00638                 else {
00639                     goto normal_method_dispatch;
00640                 }
00641             }
00642             else if ((noex_safe = NOEX_SAFE(me->flag)) > th->safe_level &&
00643                      (noex_safe > 2)) {
00644                 rb_raise(rb_eSecurityError, "calling insecure method: %s", rb_id2name(id));
00645             }
00646             else {
00647                 goto normal_method_dispatch;
00648             }
00649         }
00650     }
00651     else {
00652         /* method missing */
00653         int stat = 0;
00654         if (flag & VM_CALL_VCALL_BIT) {
00655             stat |= NOEX_VCALL;
00656         }
00657         if (flag & VM_CALL_SUPER_BIT) {
00658             stat |= NOEX_SUPER;
00659         }
00660         if (id == idMethodMissing) {
00661             VALUE *argv = ALLOCA_N(VALUE, num);
00662             vm_method_missing_args(th, argv, num - 1, 0, stat);
00663             rb_raise_method_missing(th, num, argv, recv, stat);
00664         }
00665         else {
00666             val = vm_method_missing(th, id, recv, num, blockptr, stat);
00667         }
00668     }
00669 
00670     RUBY_VM_CHECK_INTS();
00671     return val;
00672 }
00673 
00674 /* yield */
00675 
00676 static inline int
00677 block_proc_is_lambda(const VALUE procval)
00678 {
00679     rb_proc_t *proc;
00680 
00681     if (procval) {
00682         GetProcPtr(procval, proc);
00683         return proc->is_lambda;
00684     }
00685     else {
00686         return 0;
00687     }
00688 }
00689 
00690 static inline VALUE
00691 vm_yield_with_cfunc(rb_thread_t *th, const rb_block_t *block,
00692                     VALUE self, int argc, const VALUE *argv,
00693                     const rb_block_t *blockargptr)
00694 {
00695     NODE *ifunc = (NODE *) block->iseq;
00696     VALUE val, arg, blockarg;
00697     int lambda = block_proc_is_lambda(block->proc);
00698 
00699     if (lambda) {
00700         arg = rb_ary_new4(argc, argv);
00701     }
00702     else if (argc == 0) {
00703         arg = Qnil;
00704     }
00705     else {
00706         arg = argv[0];
00707     }
00708 
00709     if (blockargptr) {
00710         if (blockargptr->proc) {
00711             blockarg = blockargptr->proc;
00712         }
00713         else {
00714             blockarg = rb_vm_make_proc(th, blockargptr, rb_cProc);
00715         }
00716     }
00717     else {
00718         blockarg = Qnil;
00719     }
00720 
00721     vm_push_frame(th, 0, VM_FRAME_MAGIC_IFUNC,
00722                   self, (VALUE)block->dfp,
00723                   0, th->cfp->sp, block->lfp, 1);
00724 
00725     if (blockargptr) {
00726         th->cfp->lfp[0] = GC_GUARDED_PTR((VALUE)blockargptr);
00727     }
00728     val = (*ifunc->nd_cfnc) (arg, ifunc->nd_tval, argc, argv, blockarg);
00729 
00730     th->cfp++;
00731     return val;
00732 }
00733 
00734 
00735 /*--
00736  * @brief on supplied all of optional, rest and post parameters.
00737  * @pre iseq is block style (not lambda style)
00738  */
00739 static inline int
00740 vm_yield_setup_block_args_complex(rb_thread_t *th, const rb_iseq_t *iseq,
00741                                   int argc, VALUE *argv)
00742 {
00743     rb_num_t opt_pc = 0;
00744     int i;
00745     const int m = iseq->argc;
00746     const int r = iseq->arg_rest;
00747     int len = iseq->arg_post_len;
00748     int start = iseq->arg_post_start;
00749     int rsize = argc > m ? argc - m : 0;    /* # of arguments which did not consumed yet */
00750     int psize = rsize > len ? len : rsize;  /* # of post arguments */
00751     int osize = 0;  /* # of opt arguments */
00752     VALUE ary;
00753 
00754     /* reserves arguments for post parameters */
00755     rsize -= psize;
00756 
00757     if (iseq->arg_opts) {
00758         const int opts = iseq->arg_opts - 1;
00759         if (rsize > opts) {
00760             osize = opts;
00761             opt_pc = iseq->arg_opt_table[opts];
00762         }
00763         else {
00764             osize = rsize;
00765             opt_pc = iseq->arg_opt_table[rsize];
00766         }
00767     }
00768     rsize -= osize;
00769 
00770     if (0) {
00771         printf(" argc: %d\n", argc);
00772         printf("  len: %d\n", len);
00773         printf("start: %d\n", start);
00774         printf("rsize: %d\n", rsize);
00775     }
00776 
00777     if (r == -1) {
00778         /* copy post argument */
00779         MEMMOVE(&argv[start], &argv[m+osize], VALUE, psize);
00780     }
00781     else {
00782         ary = rb_ary_new4(rsize, &argv[r]);
00783 
00784         /* copy post argument */
00785         MEMMOVE(&argv[start], &argv[m+rsize+osize], VALUE, psize);
00786         argv[r] = ary;
00787     }
00788 
00789     for (i=psize; i<len; i++) {
00790         argv[start + i] = Qnil;
00791     }
00792 
00793     return (int)opt_pc;
00794 }
00795 
00796 static inline int
00797 vm_yield_setup_block_args(rb_thread_t *th, const rb_iseq_t * iseq,
00798                           int orig_argc, VALUE *argv,
00799                           const rb_block_t *blockptr)
00800 {
00801     int i;
00802     int argc = orig_argc;
00803     const int m = iseq->argc;
00804     VALUE ary, arg0;
00805     int opt_pc = 0;
00806 
00807     th->mark_stack_len = argc;
00808 
00809     /*
00810      * yield [1, 2]
00811      *  => {|a|} => a = [1, 2]
00812      *  => {|a, b|} => a, b = [1, 2]
00813      */
00814     arg0 = argv[0];
00815     if (!(iseq->arg_simple & 0x02) &&          /* exclude {|a|} */
00816             (m + iseq->arg_post_len) > 0 &&    /* this process is meaningful */
00817             argc == 1 && !NIL_P(ary = rb_check_array_type(arg0))) { /* rhs is only an array */
00818         th->mark_stack_len = argc = RARRAY_LENINT(ary);
00819 
00820         CHECK_STACK_OVERFLOW(th->cfp, argc);
00821 
00822         MEMCPY(argv, RARRAY_PTR(ary), VALUE, argc);
00823     }
00824     else {
00825         argv[0] = arg0;
00826     }
00827 
00828     for (i=argc; i<m; i++) {
00829         argv[i] = Qnil;
00830     }
00831 
00832     if (iseq->arg_rest == -1 && iseq->arg_opts == 0) {
00833         const int arg_size = iseq->arg_size;
00834         if (arg_size < argc) {
00835             /*
00836              * yield 1, 2
00837              * => {|a|} # truncate
00838              */
00839             th->mark_stack_len = argc = arg_size;
00840         }
00841     }
00842     else {
00843         int r = iseq->arg_rest;
00844 
00845         if (iseq->arg_post_len ||
00846                 iseq->arg_opts) { /* TODO: implement simple version for (iseq->arg_post_len==0 && iseq->arg_opts > 0) */
00847             opt_pc = vm_yield_setup_block_args_complex(th, iseq, argc, argv);
00848         }
00849         else {
00850             if (argc < r) {
00851                 /* yield 1
00852                  * => {|a, b, *r|}
00853                  */
00854                 for (i=argc; i<r; i++) {
00855                     argv[i] = Qnil;
00856                 }
00857                 argv[r] = rb_ary_new();
00858             }
00859             else {
00860                 argv[r] = rb_ary_new4(argc-r, &argv[r]);
00861             }
00862         }
00863 
00864         th->mark_stack_len = iseq->arg_size;
00865     }
00866 
00867     /* {|&b|} */
00868     if (iseq->arg_block != -1) {
00869         VALUE procval = Qnil;
00870 
00871         if (blockptr) {
00872             if (blockptr->proc == 0) {
00873                 procval = rb_vm_make_proc(th, blockptr, rb_cProc);
00874             }
00875             else {
00876                 procval = blockptr->proc;
00877             }
00878         }
00879 
00880         argv[iseq->arg_block] = procval;
00881     }
00882 
00883     th->mark_stack_len = 0;
00884     return opt_pc;
00885 }
00886 
00887 static inline int
00888 vm_yield_setup_args(rb_thread_t * const th, const rb_iseq_t *iseq,
00889                     int argc, VALUE *argv,
00890                     const rb_block_t *blockptr, int lambda)
00891 {
00892     if (0) { /* for debug */
00893         printf("     argc: %d\n", argc);
00894         printf("iseq argc: %d\n", iseq->argc);
00895         printf("iseq opts: %d\n", iseq->arg_opts);
00896         printf("iseq rest: %d\n", iseq->arg_rest);
00897         printf("iseq post: %d\n", iseq->arg_post_len);
00898         printf("iseq blck: %d\n", iseq->arg_block);
00899         printf("iseq smpl: %d\n", iseq->arg_simple);
00900         printf("   lambda: %s\n", lambda ? "true" : "false");
00901     }
00902 
00903     if (lambda) {
00904         /* call as method */
00905         int opt_pc;
00906         VM_CALLEE_SETUP_ARG(opt_pc, th, iseq, argc, argv, &blockptr);
00907         return opt_pc;
00908     }
00909     else {
00910         return vm_yield_setup_block_args(th, iseq, argc, argv, blockptr);
00911     }
00912 }
00913 
00914 static VALUE
00915 vm_invoke_block(rb_thread_t *th, rb_control_frame_t *reg_cfp, rb_num_t num, rb_num_t flag)
00916 {
00917     const rb_block_t *block = GET_BLOCK_PTR();
00918     rb_iseq_t *iseq;
00919     int argc = (int)num;
00920     VALUE type = GET_ISEQ()->local_iseq->type;
00921 
00922     if ((type != ISEQ_TYPE_METHOD && type != ISEQ_TYPE_CLASS) || block == 0) {
00923         rb_vm_localjump_error("no block given (yield)", Qnil, 0);
00924     }
00925     iseq = block->iseq;
00926 
00927     argc = caller_setup_args(th, GET_CFP(), flag, argc, 0, 0);
00928 
00929     if (BUILTIN_TYPE(iseq) != T_NODE) {
00930         int opt_pc;
00931         const int arg_size = iseq->arg_size;
00932         VALUE * const rsp = GET_SP() - argc;
00933         SET_SP(rsp);
00934 
00935         CHECK_STACK_OVERFLOW(GET_CFP(), iseq->stack_max);
00936         opt_pc = vm_yield_setup_args(th, iseq, argc, rsp, 0,
00937                                      block_proc_is_lambda(block->proc));
00938 
00939         vm_push_frame(th, iseq,
00940                       VM_FRAME_MAGIC_BLOCK, block->self, (VALUE) block->dfp,
00941                       iseq->iseq_encoded + opt_pc, rsp + arg_size, block->lfp,
00942                       iseq->local_size - arg_size);
00943 
00944         return Qundef;
00945     }
00946     else {
00947         VALUE val = vm_yield_with_cfunc(th, block, block->self, argc, STACK_ADDR_FROM_TOP(argc), 0);
00948         POPN(argc); /* TODO: should put before C/yield? */
00949         return val;
00950     }
00951 }
00952 
00953 /* svar */
00954 
00955 static inline NODE *
00956 lfp_svar_place(rb_thread_t *th, VALUE *lfp)
00957 {
00958     VALUE *svar;
00959 
00960     if (lfp && th->local_lfp != lfp) {
00961         svar = &lfp[-1];
00962     }
00963     else {
00964         svar = &th->local_svar;
00965     }
00966     if (NIL_P(*svar)) {
00967         *svar = (VALUE)NEW_IF(Qnil, Qnil, Qnil);
00968     }
00969     return (NODE *)*svar;
00970 }
00971 
00972 static VALUE
00973 lfp_svar_get(rb_thread_t *th, VALUE *lfp, VALUE key)
00974 {
00975     NODE *svar = lfp_svar_place(th, lfp);
00976 
00977     switch (key) {
00978       case 0:
00979         return svar->u1.value;
00980       case 1:
00981         return svar->u2.value;
00982       default: {
00983         const VALUE hash = svar->u3.value;
00984 
00985         if (hash == Qnil) {
00986             return Qnil;
00987         }
00988         else {
00989             return rb_hash_lookup(hash, key);
00990         }
00991       }
00992     }
00993 }
00994 
00995 static void
00996 lfp_svar_set(rb_thread_t *th, VALUE *lfp, VALUE key, VALUE val)
00997 {
00998     NODE *svar = lfp_svar_place(th, lfp);
00999 
01000     switch (key) {
01001       case 0:
01002         svar->u1.value = val;
01003         return;
01004       case 1:
01005         svar->u2.value = val;
01006         return;
01007       default: {
01008         VALUE hash = svar->u3.value;
01009 
01010         if (hash == Qnil) {
01011             svar->u3.value = hash = rb_hash_new();
01012         }
01013         rb_hash_aset(hash, key, val);
01014       }
01015     }
01016 }
01017 
01018 static inline VALUE
01019 vm_getspecial(rb_thread_t *th, VALUE *lfp, VALUE key, rb_num_t type)
01020 {
01021     VALUE val;
01022 
01023     if (type == 0) {
01024         VALUE k = key;
01025         if (FIXNUM_P(key)) {
01026             k = FIX2INT(key);
01027         }
01028         val = lfp_svar_get(th, lfp, k);
01029     }
01030     else {
01031         VALUE backref = lfp_svar_get(th, lfp, 1);
01032 
01033         if (type & 0x01) {
01034             switch (type >> 1) {
01035               case '&':
01036                 val = rb_reg_last_match(backref);
01037                 break;
01038               case '`':
01039                 val = rb_reg_match_pre(backref);
01040                 break;
01041               case '\'':
01042                 val = rb_reg_match_post(backref);
01043                 break;
01044               case '+':
01045                 val = rb_reg_match_last(backref);
01046                 break;
01047               default:
01048                 rb_bug("unexpected back-ref");
01049             }
01050         }
01051         else {
01052             val = rb_reg_nth_match((int)(type >> 1), backref);
01053         }
01054     }
01055     return val;
01056 }
01057 
01058 static NODE *
01059 vm_get_cref0(const rb_iseq_t *iseq, const VALUE *lfp, const VALUE *dfp)
01060 {
01061     while (1) {
01062         if (lfp == dfp) {
01063             return iseq->cref_stack;
01064         }
01065         else if (dfp[-1] != Qnil) {
01066             return (NODE *)dfp[-1];
01067         }
01068         dfp = GET_PREV_DFP(dfp);
01069     }
01070 }
01071 
01072 static NODE *
01073 vm_get_cref(const rb_iseq_t *iseq, const VALUE *lfp, const VALUE *dfp)
01074 {
01075     NODE *cref = vm_get_cref0(iseq, lfp, dfp);
01076 
01077     if (cref == 0) {
01078         rb_bug("vm_get_cref: unreachable");
01079     }
01080     return cref;
01081 }
01082 
01083 static NODE *
01084 vm_cref_push(rb_thread_t *th, VALUE klass, int noex, rb_block_t *blockptr)
01085 {
01086     rb_control_frame_t *cfp = vm_get_ruby_level_caller_cfp(th, th->cfp);
01087     NODE *cref = NEW_BLOCK(klass);
01088     cref->nd_file = 0;
01089     cref->nd_visi = noex;
01090 
01091     if (blockptr) {
01092         cref->nd_next = vm_get_cref0(blockptr->iseq, blockptr->lfp, blockptr->dfp);
01093     }
01094     else if (cfp) {
01095         cref->nd_next = vm_get_cref0(cfp->iseq, cfp->lfp, cfp->dfp);
01096     }
01097 
01098     return cref;
01099 }
01100 
01101 static inline VALUE
01102 vm_get_cbase(const rb_iseq_t *iseq, const VALUE *lfp, const VALUE *dfp)
01103 {
01104     NODE *cref = vm_get_cref(iseq, lfp, dfp);
01105     VALUE klass = Qundef;
01106 
01107     while (cref) {
01108         if ((klass = cref->nd_clss) != 0) {
01109             break;
01110         }
01111         cref = cref->nd_next;
01112     }
01113 
01114     return klass;
01115 }
01116 
01117 static inline VALUE
01118 vm_get_const_base(const rb_iseq_t *iseq, const VALUE *lfp, const VALUE *dfp)
01119 {
01120     NODE *cref = vm_get_cref(iseq, lfp, dfp);
01121     VALUE klass = Qundef;
01122 
01123     while (cref) {
01124         if (!(cref->flags & NODE_FL_CREF_PUSHED_BY_EVAL) &&
01125             (klass = cref->nd_clss) != 0) {
01126             break;
01127         }
01128         cref = cref->nd_next;
01129     }
01130 
01131     return klass;
01132 }
01133 
01134 static inline void
01135 vm_check_if_namespace(VALUE klass)
01136 {
01137     VALUE str;
01138     switch (TYPE(klass)) {
01139       case T_CLASS:
01140       case T_MODULE:
01141         break;
01142       default:
01143         str = rb_inspect(klass);
01144         rb_raise(rb_eTypeError, "%s is not a class/module",
01145                  StringValuePtr(str));
01146     }
01147 }
01148 
01149 static inline VALUE
01150 vm_get_ev_const(rb_thread_t *th, const rb_iseq_t *iseq,
01151                 VALUE orig_klass, ID id, int is_defined)
01152 {
01153     VALUE val;
01154 
01155     if (orig_klass == Qnil) {
01156         /* in current lexical scope */
01157         const NODE *cref = vm_get_cref(iseq, th->cfp->lfp, th->cfp->dfp);
01158         const NODE *root_cref = NULL;
01159         VALUE klass = orig_klass;
01160 
01161         while (cref && cref->nd_next) {
01162             if (!(cref->flags & NODE_FL_CREF_PUSHED_BY_EVAL)) {
01163                 klass = cref->nd_clss;
01164                 if (root_cref == NULL)
01165                     root_cref = cref;
01166             }
01167             cref = cref->nd_next;
01168 
01169             if (!NIL_P(klass)) {
01170                 VALUE am = 0;
01171               search_continue:
01172                 if (RCLASS_IV_TBL(klass) &&
01173                     st_lookup(RCLASS_IV_TBL(klass), id, &val)) {
01174                     if (val == Qundef) {
01175                         if (am == klass) break;
01176                         am = klass;
01177                         rb_autoload_load(klass, id);
01178                         goto search_continue;
01179                     }
01180                     else {
01181                         if (is_defined) {
01182                             return 1;
01183                         }
01184                         else {
01185                             return val;
01186                         }
01187                     }
01188                 }
01189             }
01190         }
01191 
01192         /* search self */
01193         if (root_cref && !NIL_P(root_cref->nd_clss)) {
01194             klass = root_cref->nd_clss;
01195         }
01196         else {
01197             klass = CLASS_OF(th->cfp->self);
01198         }
01199 
01200         if (is_defined) {
01201             return rb_const_defined(klass, id);
01202         }
01203         else {
01204             return rb_const_get(klass, id);
01205         }
01206     }
01207     else {
01208         vm_check_if_namespace(orig_klass);
01209         if (is_defined) {
01210             return rb_const_defined_from(orig_klass, id);
01211         }
01212         else {
01213             return rb_const_get_from(orig_klass, id);
01214         }
01215     }
01216 }
01217 
01218 static inline VALUE
01219 vm_get_cvar_base(NODE *cref)
01220 {
01221     VALUE klass;
01222 
01223     while (cref && cref->nd_next &&
01224            (NIL_P(cref->nd_clss) || FL_TEST(cref->nd_clss, FL_SINGLETON) ||
01225             (cref->flags & NODE_FL_CREF_PUSHED_BY_EVAL))) {
01226         cref = cref->nd_next;
01227 
01228         if (!cref->nd_next) {
01229             rb_warn("class variable access from toplevel");
01230         }
01231     }
01232 
01233     klass = cref->nd_clss;
01234 
01235     if (NIL_P(klass)) {
01236         rb_raise(rb_eTypeError, "no class variables available");
01237     }
01238     return klass;
01239 }
01240 
01241 
01242 #ifndef USE_IC_FOR_IVAR
01243 #define USE_IC_FOR_IVAR 1
01244 #endif
01245 
01246 static VALUE
01247 vm_getivar(VALUE obj, ID id, IC ic)
01248 {
01249 #if USE_IC_FOR_IVAR
01250     if (TYPE(obj) ==  T_OBJECT) {
01251         VALUE val = Qundef;
01252         VALUE klass = RBASIC(obj)->klass;
01253 
01254         if (ic->ic_class == klass) {
01255             long index = ic->ic_value.index;
01256             long len = ROBJECT_NUMIV(obj);
01257             VALUE *ptr = ROBJECT_IVPTR(obj);
01258 
01259             if (index < len) {
01260                 val = ptr[index];
01261             }
01262         }
01263         else {
01264             st_data_t index;
01265             long len = ROBJECT_NUMIV(obj);
01266             VALUE *ptr = ROBJECT_IVPTR(obj);
01267             struct st_table *iv_index_tbl = ROBJECT_IV_INDEX_TBL(obj);
01268 
01269             if (iv_index_tbl) {
01270                 if (st_lookup(iv_index_tbl, id, &index)) {
01271                     if ((long)index < len) {
01272                         val = ptr[index];
01273                     }
01274                     ic->ic_class = klass;
01275                     ic->ic_value.index = index;
01276                 }
01277             }
01278         }
01279         if (UNLIKELY(val == Qundef)) {
01280             rb_warning("instance variable %s not initialized", rb_id2name(id));
01281             val = Qnil;
01282         }
01283         return val;
01284     }
01285     else {
01286         return rb_ivar_get(obj, id);
01287     }
01288 #else
01289     return rb_ivar_get(obj, id);
01290 #endif
01291 }
01292 
01293 static void
01294 vm_setivar(VALUE obj, ID id, VALUE val, IC ic)
01295 {
01296 #if USE_IC_FOR_IVAR
01297     if (!OBJ_UNTRUSTED(obj) && rb_safe_level() >= 4) {
01298         rb_raise(rb_eSecurityError, "Insecure: can't modify instance variable");
01299     }
01300     if (OBJ_FROZEN(obj)) {
01301         rb_error_frozen("object");
01302     }
01303 
01304     if (TYPE(obj) == T_OBJECT) {
01305         VALUE klass = RBASIC(obj)->klass;
01306         st_data_t index;
01307 
01308         if (ic->ic_class == klass) {
01309             long index = ic->ic_value.index;
01310             long len = ROBJECT_NUMIV(obj);
01311             VALUE *ptr = ROBJECT_IVPTR(obj);
01312 
01313             if (index < len) {
01314                 ptr[index] = val;
01315                 return; /* inline cache hit */
01316             }
01317         }
01318         else {
01319             struct st_table *iv_index_tbl = ROBJECT_IV_INDEX_TBL(obj);
01320 
01321             if (iv_index_tbl && st_lookup(iv_index_tbl, (st_data_t)id, &index)) {
01322                 ic->ic_class = klass;
01323                 ic->ic_value.index = index;
01324             }
01325             /* fall through */
01326         }
01327     }
01328     rb_ivar_set(obj, id, val);
01329 #else
01330     rb_ivar_set(obj, id, val);
01331 #endif
01332 }
01333 
01334 static inline const rb_method_entry_t *
01335 vm_method_search(VALUE id, VALUE klass, IC ic)
01336 {
01337     rb_method_entry_t *me;
01338 #if OPT_INLINE_METHOD_CACHE
01339     if (LIKELY(klass == ic->ic_class) &&
01340         LIKELY(GET_VM_STATE_VERSION() == ic->ic_vmstat)) {
01341         me = ic->ic_value.method;
01342     }
01343     else {
01344         me = rb_method_entry(klass, id);
01345         ic->ic_class = klass;
01346         ic->ic_value.method = me;
01347         ic->ic_vmstat = GET_VM_STATE_VERSION();
01348     }
01349 #else
01350     me = rb_method_entry(klass, id);
01351 #endif
01352     return me;
01353 }
01354 
01355 static inline VALUE
01356 vm_search_normal_superclass(VALUE klass, VALUE recv)
01357 {
01358     if (BUILTIN_TYPE(klass) == T_CLASS) {
01359         return RCLASS_SUPER(klass);
01360     }
01361     else if (BUILTIN_TYPE(klass) == T_MODULE) {
01362         VALUE k = CLASS_OF(recv);
01363         while (k) {
01364             if (BUILTIN_TYPE(k) == T_ICLASS && RBASIC(k)->klass == klass) {
01365                 return RCLASS_SUPER(k);
01366             }
01367             k = RCLASS_SUPER(k);
01368         }
01369         return rb_cObject;
01370     }
01371     else {
01372         rb_bug("vm_search_normal_superclass: should not be reach here");
01373     }
01374 }
01375 
01376 static void
01377 vm_search_superclass(rb_control_frame_t *reg_cfp, rb_iseq_t *ip,
01378                      VALUE recv, VALUE sigval,
01379                      ID *idp, VALUE *klassp)
01380 {
01381     ID id;
01382     VALUE klass;
01383 
01384     while (ip && !ip->klass) {
01385         ip = ip->parent_iseq;
01386     }
01387 
01388     if (ip == 0) {
01389         rb_raise(rb_eNoMethodError, "super called outside of method");
01390     }
01391 
01392     id = ip->defined_method_id;
01393 
01394     if (ip != ip->local_iseq) {
01395         /* defined by Module#define_method() */
01396         rb_control_frame_t *lcfp = GET_CFP();
01397 
01398         if (!sigval) {
01399             /* zsuper */
01400             rb_raise(rb_eRuntimeError, "implicit argument passing of super from method defined by define_method() is not supported. Specify all arguments explicitly.");
01401         }
01402 
01403         while (lcfp->iseq != ip) {
01404             VALUE *tdfp = GET_PREV_DFP(lcfp->dfp);
01405             while (1) {
01406                 lcfp = RUBY_VM_PREVIOUS_CONTROL_FRAME(lcfp);
01407                 if (lcfp->dfp == tdfp) {
01408                     break;
01409                 }
01410             }
01411         }
01412 
01413         /* temporary measure for [Bug #2420] [Bug #3136] */
01414         if (!lcfp->me) {
01415             rb_raise(rb_eNoMethodError, "super called outside of method");
01416         }
01417 
01418         id = lcfp->me->def->original_id;
01419         klass = vm_search_normal_superclass(lcfp->me->klass, recv);
01420     }
01421     else {
01422         klass = vm_search_normal_superclass(ip->klass, recv);
01423     }
01424 
01425     *idp = id;
01426     *klassp = klass;
01427 }
01428 
01429 static VALUE
01430 vm_throw(rb_thread_t *th, rb_control_frame_t *reg_cfp,
01431          rb_num_t throw_state, VALUE throwobj)
01432 {
01433     int state = (int)(throw_state & 0xff);
01434     int flag = (int)(throw_state & 0x8000);
01435     rb_num_t level = throw_state >> 16;
01436 
01437     if (state != 0) {
01438         VALUE *pt = 0;
01439         if (flag != 0) {
01440             pt = (void *) 1;
01441         }
01442         else {
01443             if (state == TAG_BREAK) {
01444                 rb_control_frame_t *cfp = GET_CFP();
01445                 VALUE *dfp = GET_DFP();
01446                 int is_orphan = 1;
01447                 rb_iseq_t *base_iseq = GET_ISEQ();
01448 
01449               search_parent:
01450                 if (cfp->iseq->type != ISEQ_TYPE_BLOCK) {
01451                     if (cfp->iseq->type == ISEQ_TYPE_CLASS) {
01452                         cfp = RUBY_VM_PREVIOUS_CONTROL_FRAME(cfp);
01453                         dfp = cfp->dfp;
01454                         goto search_parent;
01455                     }
01456                     dfp = GC_GUARDED_PTR_REF((VALUE *) *dfp);
01457                     base_iseq = base_iseq->parent_iseq;
01458 
01459                     while ((VALUE *) cfp < th->stack + th->stack_size) {
01460                         if (cfp->dfp == dfp) {
01461                             goto search_parent;
01462                         }
01463                         cfp = RUBY_VM_PREVIOUS_CONTROL_FRAME(cfp);
01464                     }
01465                     rb_bug("VM (throw): can't find break base.");
01466                 }
01467 
01468                 if (VM_FRAME_TYPE(cfp) == VM_FRAME_MAGIC_LAMBDA) {
01469                     /* lambda{... break ...} */
01470                     is_orphan = 0;
01471                     pt = cfp->dfp;
01472                     state = TAG_RETURN;
01473                 }
01474                 else {
01475                     dfp = GC_GUARDED_PTR_REF((VALUE *) *dfp);
01476 
01477                     while ((VALUE *)cfp < th->stack + th->stack_size) {
01478                         if (cfp->dfp == dfp) {
01479                             VALUE epc = cfp->pc - cfp->iseq->iseq_encoded;
01480                             rb_iseq_t *iseq = cfp->iseq;
01481                             int i;
01482 
01483                             for (i=0; i<iseq->catch_table_size; i++) {
01484                                 struct iseq_catch_table_entry *entry = &iseq->catch_table[i];
01485 
01486                                 if (entry->type == CATCH_TYPE_BREAK &&
01487                                     entry->start < epc && entry->end >= epc) {
01488                                     if (entry->cont == epc) {
01489                                         goto found;
01490                                     }
01491                                     else {
01492                                         break;
01493                                     }
01494                                 }
01495                             }
01496                             break;
01497 
01498                           found:
01499                             pt = dfp;
01500                             is_orphan = 0;
01501                             break;
01502                         }
01503                         cfp = RUBY_VM_PREVIOUS_CONTROL_FRAME(cfp);
01504                     }
01505                 }
01506 
01507                 if (is_orphan) {
01508                     rb_vm_localjump_error("break from proc-closure", throwobj, TAG_BREAK);
01509                 }
01510             }
01511             else if (state == TAG_RETRY) {
01512                 rb_num_t i;
01513                 pt = GC_GUARDED_PTR_REF((VALUE *) * GET_DFP());
01514                 for (i = 0; i < level; i++) {
01515                     pt = GC_GUARDED_PTR_REF((VALUE *) * pt);
01516                 }
01517             }
01518             else if (state == TAG_RETURN) {
01519                 rb_control_frame_t *cfp = GET_CFP();
01520                 VALUE *dfp = GET_DFP();
01521                 VALUE *lfp = GET_LFP();
01522 
01523                 /* check orphan and get dfp */
01524                 while ((VALUE *) cfp < th->stack + th->stack_size) {
01525                     if (!lfp) {
01526                         lfp = cfp->lfp;
01527                     }
01528                     if (cfp->dfp == lfp && cfp->iseq->type == ISEQ_TYPE_CLASS) {
01529                         lfp = 0;
01530                     }
01531 
01532                     if (cfp->lfp == lfp) {
01533                         if (VM_FRAME_TYPE(cfp) == VM_FRAME_MAGIC_LAMBDA) {
01534                             VALUE *tdfp = dfp;
01535 
01536                             while (lfp != tdfp) {
01537                                 if (cfp->dfp == tdfp) {
01538                                     /* in lambda */
01539                                     dfp = cfp->dfp;
01540                                     goto valid_return;
01541                                 }
01542                                 tdfp = GC_GUARDED_PTR_REF((VALUE *)*tdfp);
01543                             }
01544                         }
01545                     }
01546 
01547                     if (cfp->dfp == lfp && cfp->iseq->type == ISEQ_TYPE_METHOD) {
01548                         dfp = lfp;
01549                         goto valid_return;
01550                     }
01551 
01552                     cfp = RUBY_VM_PREVIOUS_CONTROL_FRAME(cfp);
01553                 }
01554 
01555                 rb_vm_localjump_error("unexpected return", throwobj, TAG_RETURN);
01556 
01557               valid_return:
01558                 pt = dfp;
01559             }
01560             else {
01561                 rb_bug("isns(throw): unsupport throw type");
01562             }
01563         }
01564         th->state = state;
01565         return (VALUE)NEW_THROW_OBJECT(throwobj, (VALUE) pt, state);
01566     }
01567     else {
01568         /* continue throw */
01569         VALUE err = throwobj;
01570 
01571         if (FIXNUM_P(err)) {
01572             th->state = FIX2INT(err);
01573         }
01574         else if (SYMBOL_P(err)) {
01575             th->state = TAG_THROW;
01576         }
01577         else if (BUILTIN_TYPE(err) == T_NODE) {
01578             th->state = GET_THROWOBJ_STATE(err);
01579         }
01580         else {
01581             th->state = TAG_RAISE;
01582             /*th->state = FIX2INT(rb_ivar_get(err, idThrowState));*/
01583         }
01584         return err;
01585     }
01586 }
01587 
01588 static inline void
01589 vm_expandarray(rb_control_frame_t *cfp, VALUE ary, rb_num_t num, int flag)
01590 {
01591     int is_splat = flag & 0x01;
01592     rb_num_t space_size = num + is_splat;
01593     VALUE *base = cfp->sp, *ptr;
01594     volatile VALUE tmp_ary;
01595     rb_num_t len;
01596 
01597     if (TYPE(ary) != T_ARRAY) {
01598         ary = rb_ary_to_ary(ary);
01599     }
01600 
01601     cfp->sp += space_size;
01602 
01603     tmp_ary = ary;
01604     ptr = RARRAY_PTR(ary);
01605     len = (rb_num_t)RARRAY_LEN(ary);
01606 
01607     if (flag & 0x02) {
01608         /* post: ..., nil ,ary[-1], ..., ary[0..-num] # top */
01609         rb_num_t i = 0, j;
01610 
01611         if (len < num) {
01612             for (i=0; i<num-len; i++) {
01613                 *base++ = Qnil;
01614             }
01615         }
01616         for (j=0; i<num; i++, j++) {
01617             VALUE v = ptr[len - j - 1];
01618             *base++ = v;
01619         }
01620         if (is_splat) {
01621             *base = rb_ary_new4(len - j, ptr);
01622         }
01623     }
01624     else {
01625         /* normal: ary[num..-1], ary[num-2], ary[num-3], ..., ary[0] # top */
01626         rb_num_t i;
01627         VALUE *bptr = &base[space_size - 1];
01628 
01629         for (i=0; i<num; i++) {
01630             if (len <= i) {
01631                 for (; i<num; i++) {
01632                     *bptr-- = Qnil;
01633                 }
01634                 break;
01635             }
01636             *bptr-- = ptr[i];
01637         }
01638         if (is_splat) {
01639             if (num > len) {
01640                 *bptr = rb_ary_new();
01641             }
01642             else {
01643                 *bptr = rb_ary_new4(len - num, ptr + num);
01644             }
01645         }
01646     }
01647 }
01648 
01649 static inline int
01650 check_cfunc(const rb_method_entry_t *me, VALUE (*func)())
01651 {
01652     if (me && me->def->type == VM_METHOD_TYPE_CFUNC &&
01653         me->def->body.cfunc.func == func) {
01654         return 1;
01655     }
01656     else {
01657         return 0;
01658     }
01659 }
01660 
01661 static
01662 #ifndef NO_BIG_INLINE
01663 inline
01664 #endif
01665 VALUE
01666 opt_eq_func(VALUE recv, VALUE obj, IC ic)
01667 {
01668     if (FIXNUM_2_P(recv, obj) &&
01669         BASIC_OP_UNREDEFINED_P(BOP_EQ)) {
01670         return (recv == obj) ? Qtrue : Qfalse;
01671     }
01672     else if (!SPECIAL_CONST_P(recv) && !SPECIAL_CONST_P(obj)) {
01673         if (HEAP_CLASS_OF(recv) == rb_cFloat &&
01674                  HEAP_CLASS_OF(obj) == rb_cFloat &&
01675                  BASIC_OP_UNREDEFINED_P(BOP_EQ)) {
01676             double a = RFLOAT_VALUE(recv);
01677             double b = RFLOAT_VALUE(obj);
01678 
01679             if (isnan(a) || isnan(b)) {
01680                 return Qfalse;
01681             }
01682             return  (a == b) ? Qtrue : Qfalse;
01683         }
01684         else if (HEAP_CLASS_OF(recv) == rb_cString &&
01685                  HEAP_CLASS_OF(obj) == rb_cString &&
01686                  BASIC_OP_UNREDEFINED_P(BOP_EQ)) {
01687             return rb_str_equal(recv, obj);
01688         }
01689     }
01690 
01691     {
01692         const rb_method_entry_t *me = vm_method_search(idEq, CLASS_OF(recv), ic);
01693         extern VALUE rb_obj_equal(VALUE obj1, VALUE obj2);
01694 
01695         if (check_cfunc(me, rb_obj_equal)) {
01696             return recv == obj ? Qtrue : Qfalse;
01697         }
01698     }
01699 
01700     return Qundef;
01701 }
01702 
01703 struct opt_case_dispatch_i_arg {
01704     VALUE obj;
01705     int label;
01706 };
01707 
01708 static int
01709 opt_case_dispatch_i(st_data_t key, st_data_t data, st_data_t p)
01710 {
01711     struct opt_case_dispatch_i_arg *arg = (void *)p;
01712 
01713     if (RTEST(rb_funcall((VALUE)key, idEqq, 1, arg->obj))) {
01714         arg->label = FIX2INT((VALUE)data);
01715         return ST_STOP;
01716     }
01717     else {
01718         return ST_CONTINUE;
01719     }
01720 }
01721 
01722 

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