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ruby--ruby/vm_insnhelper.c
nobu 5c0515f2e2 * vm_insnhelper.c (vm_yield_setup_args): should not drop arguments 
corresponding to default paramters.


git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@19887 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
2008-10-22 07:28:00 +00:00

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/**********************************************************************
insnhelper.c - instruction helper functions.
$Author$
Copyright (C) 2007 Koichi Sasada
**********************************************************************/
/* finish iseq array */
#include "insns.inc"
#include <math.h>
/* control stack frame */
#ifndef INLINE
#define INLINE inline
#endif
static inline rb_control_frame_t *
vm_push_frame(rb_thread_t * th, const rb_iseq_t * iseq,
VALUE type, VALUE self, VALUE specval,
const VALUE *pc, VALUE *sp, VALUE *lfp,
int local_size)
{
rb_control_frame_t * const cfp = th->cfp = th->cfp - 1;
int i;
/* setup vm value stack */
/* nil initialize */
for (i=0; i < local_size; i++) {
*sp = Qnil;
sp++;
}
/* set special val */
*sp = GC_GUARDED_PTR(specval);
if (lfp == 0) {
lfp = sp;
}
/* setup vm control frame stack */
cfp->pc = (VALUE *)pc;
cfp->sp = sp + 1;
cfp->bp = sp + 1;
cfp->iseq = (rb_iseq_t *) iseq;
cfp->flag = type;
cfp->self = self;
cfp->lfp = lfp;
cfp->dfp = sp;
cfp->proc = 0;
#define COLLECT_PROFILE 0
#if COLLECT_PROFILE
cfp->prof_time_self = clock();
cfp->prof_time_chld = 0;
#endif
if (VMDEBUG == 2) {
SDR();
}
return cfp;
}
static inline void
vm_pop_frame(rb_thread_t *th)
{
#if COLLECT_PROFILE
rb_control_frame_t *cfp = th->cfp;
if (RUBY_VM_NORMAL_ISEQ_P(cfp->iseq)) {
VALUE current_time = clock();
rb_control_frame_t *cfp = th->cfp;
cfp->prof_time_self = current_time - cfp->prof_time_self;
(cfp+1)->prof_time_chld += cfp->prof_time_self;
cfp->iseq->profile.count++;
cfp->iseq->profile.time_cumu = cfp->prof_time_self;
cfp->iseq->profile.time_self = cfp->prof_time_self - cfp->prof_time_chld;
}
else if (0 /* c method? */) {
}
#endif
th->cfp = RUBY_VM_PREVIOUS_CONTROL_FRAME(th->cfp);
if (VMDEBUG == 2) {
SDR();
}
}
/* method dispatch */
#define VM_CALLEE_SETUP_ARG(ret, th, iseq, orig_argc, orig_argv, block) \
if (LIKELY(iseq->arg_simple & 0x01)) { \
/* simple check */ \
if (orig_argc != iseq->argc) { \
rb_raise(rb_eArgError, "wrong number of arguments (%d for %d)", orig_argc, iseq->argc); \
} \
ret = 0; \
} \
else { \
ret = vm_callee_setup_arg_complex(th, iseq, orig_argc, orig_argv, block); \
}
static inline int
vm_callee_setup_arg_complex(rb_thread_t *th, const rb_iseq_t * iseq,
int orig_argc, VALUE * orig_argv,
const rb_block_t **block)
{
const int m = iseq->argc;
int argc = orig_argc;
VALUE *argv = orig_argv;
int opt_pc = 0;
th->mark_stack_len = argc + iseq->arg_size;
/* mandatory */
if (argc < (m + iseq->arg_post_len)) { /* check with post arg */
rb_raise(rb_eArgError, "wrong number of arguments (%d for %d)",
argc, m + iseq->arg_post_len);
}
argv += m;
argc -= m;
/* post arguments */
if (iseq->arg_post_len) {
if (!(orig_argc < iseq->arg_post_start)) {
VALUE *new_argv = ALLOCA_N(VALUE, argc);
MEMCPY(new_argv, argv, VALUE, argc);
argv = new_argv;
}
MEMCPY(&orig_argv[iseq->arg_post_start], &argv[argc -= iseq->arg_post_len],
VALUE, iseq->arg_post_len);
}
/* opt arguments */
if (iseq->arg_opts) {
const int opts = iseq->arg_opts - 1 /* no opt */;
if (iseq->arg_rest == -1 && argc > opts) {
rb_raise(rb_eArgError, "wrong number of arguments (%d for %d)",
orig_argc, m + opts + iseq->arg_post_len);
}
if (argc > opts) {
argc -= opts;
argv += opts;
opt_pc = iseq->arg_opt_table[opts]; /* no opt */
}
else {
int i;
for (i = argc; i<opts; i++) {
orig_argv[i + m] = Qnil;
}
opt_pc = iseq->arg_opt_table[argc];
argc = 0;
}
}
/* rest arguments */
if (iseq->arg_rest != -1) {
orig_argv[iseq->arg_rest] = rb_ary_new4(argc, argv);
argc = 0;
}
/* block arguments */
if (block && iseq->arg_block != -1) {
VALUE blockval = Qnil;
const rb_block_t *blockptr = *block;
if (argc != 0) {
rb_raise(rb_eArgError, "wrong number of arguments (%d for %d)",
orig_argc, m + iseq->arg_post_len);
}
if (blockptr) {
/* make Proc object */
if (blockptr->proc == 0) {
rb_proc_t *proc;
blockval = vm_make_proc(th, th->cfp, blockptr, rb_cProc);
GetProcPtr(blockval, proc);
*block = &proc->block;
}
else {
blockval = blockptr->proc;
}
}
orig_argv[iseq->arg_block] = blockval; /* Proc or nil */
}
th->mark_stack_len = 0;
return opt_pc;
}
static inline int
caller_setup_args(const rb_thread_t *th, rb_control_frame_t *cfp, VALUE flag,
int argc, rb_iseq_t *blockiseq, rb_block_t **block)
{
rb_block_t *blockptr = 0;
if (block) {
if (flag & VM_CALL_ARGS_BLOCKARG_BIT) {
rb_proc_t *po;
VALUE proc;
proc = *(--cfp->sp);
if (proc != Qnil) {
if (!rb_obj_is_proc(proc)) {
VALUE b = rb_check_convert_type(proc, T_DATA, "Proc", "to_proc");
if (NIL_P(b) || !rb_obj_is_proc(b)) {
rb_raise(rb_eTypeError,
"wrong argument type %s (expected Proc)",
rb_obj_classname(proc));
}
proc = b;
}
GetProcPtr(proc, po);
blockptr = &po->block;
RUBY_VM_GET_BLOCK_PTR_IN_CFP(cfp)->proc = proc;
*block = blockptr;
}
}
else if (blockiseq) {
blockptr = RUBY_VM_GET_BLOCK_PTR_IN_CFP(cfp);
blockptr->iseq = blockiseq;
blockptr->proc = 0;
*block = blockptr;
}
}
/* expand top of stack? */
if (flag & VM_CALL_ARGS_SPLAT_BIT) {
VALUE ary = *(cfp->sp - 1);
VALUE *ptr;
int i;
VALUE tmp = rb_check_convert_type(ary, T_ARRAY, "Array", "to_a");
if (NIL_P(tmp)) {
/* do nothing */
}
else {
int len = RARRAY_LEN(tmp);
ptr = RARRAY_PTR(tmp);
cfp->sp -= 1;
CHECK_STACK_OVERFLOW(cfp, len);
for (i = 0; i < len; i++) {
*cfp->sp++ = ptr[i];
}
argc += i-1;
}
}
return argc;
}
static inline VALUE
call_cfunc(VALUE (*func)(), VALUE recv,
int len, int argc, const VALUE *argv)
{
/* printf("len: %d, argc: %d\n", len, argc); */
if (len >= 0 && argc != len) {
rb_raise(rb_eArgError, "wrong number of arguments(%d for %d)",
argc, len);
}
switch (len) {
case -2:
return (*func) (recv, rb_ary_new4(argc, argv));
break;
case -1:
return (*func) (argc, argv, recv);
break;
case 0:
return (*func) (recv);
break;
case 1:
return (*func) (recv, argv[0]);
break;
case 2:
return (*func) (recv, argv[0], argv[1]);
break;
case 3:
return (*func) (recv, argv[0], argv[1], argv[2]);
break;
case 4:
return (*func) (recv, argv[0], argv[1], argv[2], argv[3]);
break;
case 5:
return (*func) (recv, argv[0], argv[1], argv[2], argv[3], argv[4]);
break;
case 6:
return (*func) (recv, argv[0], argv[1], argv[2], argv[3], argv[4],
argv[5]);
break;
case 7:
return (*func) (recv, argv[0], argv[1], argv[2], argv[3], argv[4],
argv[5], argv[6]);
break;
case 8:
return (*func) (recv, argv[0], argv[1], argv[2], argv[3], argv[4],
argv[5], argv[6], argv[7]);
break;
case 9:
return (*func) (recv, argv[0], argv[1], argv[2], argv[3], argv[4],
argv[5], argv[6], argv[7], argv[8]);
break;
case 10:
return (*func) (recv, argv[0], argv[1], argv[2], argv[3], argv[4],
argv[5], argv[6], argv[7], argv[8], argv[9]);
break;
case 11:
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]);
break;
case 12:
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]);
break;
case 13:
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]);
break;
case 14:
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]);
break;
case 15:
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]);
break;
default:
rb_raise(rb_eArgError, "too many arguments(%d)", len);
break;
}
return Qnil; /* not reached */
}
static inline VALUE
vm_call_cfunc(rb_thread_t *th, rb_control_frame_t *reg_cfp,
int num, ID id, VALUE recv, VALUE klass,
VALUE flag, const NODE *mn, const rb_block_t *blockptr)
{
VALUE val;
EXEC_EVENT_HOOK(th, RUBY_EVENT_C_CALL, recv, id, klass);
{
rb_control_frame_t *cfp =
vm_push_frame(th, 0, VM_FRAME_MAGIC_CFUNC,
recv, (VALUE) blockptr, 0, reg_cfp->sp, 0, 1);
cfp->method_id = id;
cfp->method_class = klass;
reg_cfp->sp -= num + 1;
val = call_cfunc(mn->nd_cfnc, recv, mn->nd_argc, num, reg_cfp->sp + 1);
if (reg_cfp != th->cfp + 1) {
rb_bug("cfp consistency error - send");
}
vm_pop_frame(th);
}
EXEC_EVENT_HOOK(th, RUBY_EVENT_C_RETURN, recv, id, klass);
return val;
}
static inline VALUE
vm_call_bmethod(rb_thread_t *th, ID id, VALUE procval, VALUE recv,
VALUE klass, int argc, VALUE *argv, rb_block_t *blockptr)
{
rb_control_frame_t *cfp = th->cfp;
rb_proc_t *proc;
VALUE val;
/* control block frame */
(cfp-2)->method_id = id;
(cfp-2)->method_class = klass;
GetProcPtr(procval, proc);
val = vm_invoke_proc(th, proc, recv, argc, argv, blockptr);
return val;
}
static inline VALUE
vm_method_missing(rb_thread_t *th, ID id, VALUE recv,
int num, rb_block_t *blockptr, int opt)
{
VALUE val;
rb_control_frame_t * const reg_cfp = th->cfp;
VALUE *argv = ALLOCA_N(VALUE, num + 1);
MEMCPY(argv, STACK_ADDR_FROM_TOP(num + 1), VALUE, num + 1);
argv[0] = ID2SYM(id);
th->method_missing_reason = opt;
th->passed_block = blockptr;
POPN(num + 1);
val = rb_funcall2(recv, idMethodMissing, num + 1, argv);
return val;
}
static inline void
vm_setup_method(rb_thread_t *th, rb_control_frame_t *cfp,
const int argc, const rb_block_t *blockptr, const VALUE flag,
const VALUE iseqval, const VALUE recv, const VALUE klass)
{
rb_iseq_t *iseq;
int opt_pc, i;
VALUE *sp, *rsp = cfp->sp - argc;
/* TODO: eliminate it */
GetISeqPtr(iseqval, iseq);
VM_CALLEE_SETUP_ARG(opt_pc, th, iseq, argc, rsp, &blockptr);
/* stack overflow check */
CHECK_STACK_OVERFLOW(cfp, iseq->stack_max);
sp = rsp + iseq->arg_size;
if (LIKELY(!(flag & VM_CALL_TAILCALL_BIT))) {
if (0) printf("local_size: %d, arg_size: %d\n",
iseq->local_size, iseq->arg_size);
/* clear local variables */
for (i = 0; i < iseq->local_size - iseq->arg_size; i++) {
*sp++ = Qnil;
}
vm_push_frame(th, iseq,
VM_FRAME_MAGIC_METHOD, recv, (VALUE) blockptr,
iseq->iseq_encoded + opt_pc, sp, 0, 0);
cfp->sp = rsp - 1 /* recv */;
}
else {
VALUE *p_rsp;
th->cfp++; /* pop cf */
p_rsp = th->cfp->sp;
/* copy arguments */
for (i=0; i < (sp - rsp); i++) {
p_rsp[i] = rsp[i];
}
sp -= rsp - p_rsp;
/* clear local variables */
for (i = 0; i < iseq->local_size - iseq->arg_size; i++) {
*sp++ = Qnil;
}
vm_push_frame(th, iseq,
VM_FRAME_MAGIC_METHOD, recv, (VALUE) blockptr,
iseq->iseq_encoded + opt_pc, sp, 0, 0);
}
}
static inline VALUE
vm_call_method(rb_thread_t * const th, rb_control_frame_t * const cfp,
const int num, rb_block_t * const blockptr, const VALUE flag,
const ID id, const NODE * mn, const VALUE recv, VALUE klass)
{
VALUE val;
start_method_dispatch:
if (mn != 0) {
if ((mn->nd_noex == 0)) {
/* dispatch method */
NODE *node;
normal_method_dispatch:
node = mn->nd_body;
switch (nd_type(node)) {
case RUBY_VM_METHOD_NODE:{
vm_setup_method(th, cfp, num, blockptr, flag, (VALUE)node->nd_body, recv, klass);
return Qundef;
}
case NODE_CFUNC:{
val = vm_call_cfunc(th, cfp, num, id, recv, mn->nd_clss, flag, node, blockptr);
break;
}
case NODE_ATTRSET:{
val = rb_ivar_set(recv, node->nd_vid, *(cfp->sp - 1));
cfp->sp -= 2;
break;
}
case NODE_IVAR:{
if (num != 0) {
rb_raise(rb_eArgError, "wrong number of arguments (%d for 0)",
num);
}
val = rb_attr_get(recv, node->nd_vid);
cfp->sp -= 1;
break;
}
case NODE_BMETHOD:{
VALUE *argv = ALLOCA_N(VALUE, num);
MEMCPY(argv, cfp->sp - num, VALUE, num);
cfp->sp += - num - 1;
val = vm_call_bmethod(th, id, node->nd_cval, recv, klass, num, argv, blockptr);
break;
}
case NODE_ZSUPER:{
klass = RCLASS_SUPER(mn->nd_clss);
mn = rb_method_node(klass, id);
if (mn != 0) {
goto normal_method_dispatch;
}
else {
goto start_method_dispatch;
}
}
default:{
printf("node: %s\n", ruby_node_name(nd_type(node)));
rb_bug("eval_invoke_method: unreachable");
/* unreachable */
break;
}
}
}
else {
int noex_safe;
if (!(flag & VM_CALL_FCALL_BIT) &&
(mn->nd_noex & NOEX_MASK) & NOEX_PRIVATE) {
int stat = NOEX_PRIVATE;
if (flag & VM_CALL_VCALL_BIT) {
stat |= NOEX_VCALL;
}
val = vm_method_missing(th, id, recv, num, blockptr, stat);
}
else if (((mn->nd_noex & NOEX_MASK) & NOEX_PROTECTED) &&
!(flag & VM_CALL_SEND_BIT)) {
VALUE defined_class = mn->nd_clss;
if (TYPE(defined_class) == T_ICLASS) {
defined_class = RBASIC(defined_class)->klass;
}
if (!rb_obj_is_kind_of(cfp->self, rb_class_real(defined_class))) {
val = vm_method_missing(th, id, recv, num, blockptr, NOEX_PROTECTED);
}
else {
goto normal_method_dispatch;
}
}
else if ((noex_safe = NOEX_SAFE(mn->nd_noex)) > th->safe_level &&
(noex_safe > 2)) {
rb_raise(rb_eSecurityError, "calling insecure method: %s", rb_id2name(id));
}
else {
goto normal_method_dispatch;
}
}
}
else {
/* method missing */
if (id == idMethodMissing) {
rb_bug("method missing");
}
else {
int stat = 0;
if (flag & VM_CALL_VCALL_BIT) {
stat |= NOEX_VCALL;
}
if (flag & VM_CALL_SUPER_BIT) {
stat |= NOEX_SUPER;
}
val = vm_method_missing(th, id, recv, num, blockptr, stat);
}
}
RUBY_VM_CHECK_INTS();
return val;
}
static inline void
vm_send_optimize(rb_control_frame_t * const reg_cfp, NODE ** const mn,
rb_num_t * const flag, rb_num_t * const num,
ID * const id, const VALUE klass)
{
if (*mn && nd_type((*mn)->nd_body) == NODE_CFUNC) {
NODE *node = (*mn)->nd_body;
extern VALUE rb_f_send(int argc, VALUE *argv, VALUE recv);
if (node->nd_cfnc == rb_f_send) {
int i = *num - 1;
VALUE sym = TOPN(i);
*id = SYMBOL_P(sym) ? SYM2ID(sym) : rb_to_id(sym);
/* shift arguments */
if (i > 0) {
MEMMOVE(&TOPN(i), &TOPN(i-1), VALUE, i);
}
*mn = rb_method_node(klass, *id);
*num -= 1;
DEC_SP(1);
*flag |= VM_CALL_FCALL_BIT;
}
}
}
/* yield */
static inline int
block_proc_is_lambda(const VALUE procval)
{
rb_proc_t *proc;
if (procval) {
GetProcPtr(procval, proc);
return proc->is_lambda;
}
else {
return 0;
}
}
static inline VALUE
vm_yield_with_cfunc(rb_thread_t *th, const rb_block_t *block,
VALUE self, int argc, const VALUE *argv,
const rb_block_t *blockptr)
{
NODE *ifunc = (NODE *) block->iseq;
VALUE val, arg, blockarg;
int lambda = block_proc_is_lambda(block->proc);
if (lambda) {
arg = rb_ary_new4(argc, argv);
}
else if (argc == 0) {
arg = Qnil;
}
else {
arg = argv[0];
}
if (blockptr) {
blockarg = vm_make_proc(th, th->cfp, blockptr, rb_cProc);
}
else {
blockarg = Qnil;
}
vm_push_frame(th, 0, VM_FRAME_MAGIC_IFUNC,
self, (VALUE)block->dfp,
0, th->cfp->sp, block->lfp, 1);
val = (*ifunc->nd_cfnc) (arg, ifunc->nd_tval, argc, argv, blockarg);
th->cfp++;
return val;
}
static inline int
vm_yield_setup_args(rb_thread_t * const th, const rb_iseq_t *iseq,
int orig_argc, VALUE *argv,
const rb_block_t *blockptr, int lambda)
{
if (0) { /* for debug */
printf(" argc: %d\n", orig_argc);
printf("iseq argc: %d\n", iseq->argc);
printf("iseq opts: %d\n", iseq->arg_opts);
printf("iseq rest: %d\n", iseq->arg_rest);
printf("iseq post: %d\n", iseq->arg_post_len);
printf("iseq blck: %d\n", iseq->arg_block);
printf("iseq smpl: %d\n", iseq->arg_simple);
printf(" lambda: %s\n", lambda ? "true" : "false");
}
if (lambda) {
/* call as method */
int opt_pc;
VM_CALLEE_SETUP_ARG(opt_pc, th, iseq, orig_argc, argv, &blockptr);
return opt_pc;
}
else {
int i;
int argc = orig_argc;
const int m = iseq->argc;
VALUE ary;
th->mark_stack_len = argc;
/*
* yield [1, 2]
* => {|a|} => a = [1, 2]
* => {|a, b|} => a, b = [1, 2]
*/
if (!(iseq->arg_simple & 0x02) &&
(m + iseq->arg_post_len) > 0 &&
argc == 1 && !NIL_P(ary = rb_check_array_type(argv[0]))) {
th->mark_stack_len = argc = RARRAY_LEN(ary);
CHECK_STACK_OVERFLOW(th->cfp, argc);
MEMCPY(argv, RARRAY_PTR(ary), VALUE, argc);
}
for (i=argc; i<m; i++) {
argv[i] = Qnil;
}
if (iseq->arg_rest == -1) {
const int arg_size = iseq->arg_size;
if (arg_size < argc) {
/*
* yield 1, 2
* => {|a|} # truncate
*/
th->mark_stack_len = argc = arg_size;
}
}
else {
int r = iseq->arg_rest;
if (iseq->arg_post_len) {
int len = iseq->arg_post_len;
int start = iseq->arg_post_start;
int rsize = argc > m ? argc - m : 0;
int psize = rsize;
VALUE ary;
if (psize > len) psize = len;
ary = rb_ary_new4(rsize - psize, &argv[r]);
if (0) {
printf(" argc: %d\n", argc);
printf(" len: %d\n", len);
printf("start: %d\n", start);
printf("rsize: %d\n", rsize);
}
/* copy post argument */
MEMMOVE(&argv[start], &argv[r + rsize - psize], VALUE, psize);
for (i=psize; i<len; i++) {
argv[start + i] = Qnil;
}
argv[r] = ary;
}
else {
if (argc < r) {
/* yield 1
* => {|a, b, *r|}
*/
for (i=argc; i<r; i++) {
argv[i] = Qnil;
}
argv[r] = rb_ary_new();
}
else {
argv[r] = rb_ary_new4(argc-r, &argv[r]);
}
}
th->mark_stack_len = iseq->arg_size;
}
/* {|&b|} */
if (iseq->arg_block != -1) {
VALUE procval = Qnil;
if (blockptr) {
procval = blockptr->proc;
}
argv[iseq->arg_block] = procval;
}
th->mark_stack_len = 0;
return 0;
}
}
static VALUE
vm_invoke_block(rb_thread_t *th, rb_control_frame_t *reg_cfp, rb_num_t num, rb_num_t flag)
{
rb_block_t * const block = GET_BLOCK_PTR();
rb_iseq_t *iseq;
int argc = num;
if (GET_ISEQ()->local_iseq->type != ISEQ_TYPE_METHOD || block == 0) {
vm_localjump_error("no block given (yield)", Qnil, 0);
}
iseq = block->iseq;
argc = caller_setup_args(th, GET_CFP(), flag, argc, 0, 0);
if (BUILTIN_TYPE(iseq) != T_NODE) {
int opt_pc;
const int arg_size = iseq->arg_size;
VALUE * const rsp = GET_SP() - argc;
SET_SP(rsp);
CHECK_STACK_OVERFLOW(GET_CFP(), iseq->stack_max);
opt_pc = vm_yield_setup_args(th, iseq, argc, rsp, 0,
block_proc_is_lambda(block->proc));
vm_push_frame(th, iseq,
VM_FRAME_MAGIC_BLOCK, block->self, (VALUE) block->dfp,
iseq->iseq_encoded + opt_pc, rsp + arg_size, block->lfp,
iseq->local_size - arg_size);
return Qundef;
}
else {
VALUE val = vm_yield_with_cfunc(th, block, block->self, argc, STACK_ADDR_FROM_TOP(argc), 0);
POPN(argc); /* TODO: should put before C/yield? */
return val;
}
}
/* svar */
static inline NODE *
lfp_svar_place(rb_thread_t *th, VALUE *lfp)
{
VALUE *svar;
if (lfp && th->local_lfp != lfp) {
svar = &lfp[-1];
}
else {
svar = &th->local_svar;
}
if (NIL_P(*svar)) {
*svar = (VALUE)NEW_IF(Qnil, Qnil, Qnil);
}
return (NODE *)*svar;
}
static VALUE
lfp_svar_get(rb_thread_t *th, VALUE *lfp, VALUE key)
{
NODE *svar = lfp_svar_place(th, lfp);
switch (key) {
case 0:
return svar->u1.value;
case 1:
return svar->u2.value;
default: {
const VALUE hash = svar->u3.value;
if (hash == Qnil) {
return Qnil;
}
else {
return rb_hash_lookup(hash, key);
}
}
}
}
static void
lfp_svar_set(rb_thread_t *th, VALUE *lfp, VALUE key, VALUE val)
{
NODE *svar = lfp_svar_place(th, lfp);
switch (key) {
case 0:
svar->u1.value = val;
return;
case 1:
svar->u2.value = val;
return;
default: {
VALUE hash = svar->u3.value;
if (hash == Qnil) {
svar->u3.value = hash = rb_hash_new();
}
rb_hash_aset(hash, key, val);
}
}
}
static inline VALUE
vm_getspecial(rb_thread_t *th, VALUE *lfp, VALUE key, rb_num_t type)
{
VALUE val;
if (type == 0) {
VALUE k = key;
if (FIXNUM_P(key)) {
k = FIX2INT(key);
}
val = lfp_svar_get(th, lfp, k);
}
else {
VALUE backref = lfp_svar_get(th, lfp, 1);
if (type & 0x01) {
switch (type >> 1) {
case '&':
val = rb_reg_last_match(backref);
break;
case '`':
val = rb_reg_match_pre(backref);
break;
case '\'':
val = rb_reg_match_post(backref);
break;
case '+':
val = rb_reg_match_last(backref);
break;
default:
rb_bug("unexpected back-ref");
}
}
else {
val = rb_reg_nth_match(type >> 1, backref);
}
}
return val;
}
static NODE *
vm_get_cref(const rb_iseq_t *iseq, const VALUE *lfp, const VALUE *dfp)
{
NODE *cref = 0;
while (1) {
if (lfp == dfp) {
cref = iseq->cref_stack;
break;
}
else if (dfp[-1] != Qnil) {
cref = (NODE *)dfp[-1];
break;
}
dfp = GET_PREV_DFP(dfp);
}
if (cref == 0) {
rb_bug("vm_get_cref: unreachable");
}
return cref;
}
static NODE *
vm_cref_push(rb_thread_t *th, VALUE klass, int noex)
{
rb_control_frame_t *cfp = vm_get_ruby_level_caller_cfp(th, th->cfp);
NODE *cref = NEW_BLOCK(klass);
cref->nd_file = 0;
cref->nd_visi = noex;
if (cfp) {
cref->nd_next = vm_get_cref(cfp->iseq, cfp->lfp, cfp->dfp);
}
return cref;
}
static inline VALUE
vm_get_cbase(const rb_iseq_t *iseq, const VALUE *lfp, const VALUE *dfp)
{
NODE *cref = vm_get_cref(iseq, lfp, dfp);
VALUE klass = Qundef;
while (cref) {
if ((klass = cref->nd_clss) != 0) {
break;
}
cref = cref->nd_next;
}
return klass;
}
static inline void
vm_check_if_namespace(VALUE klass)
{
switch (TYPE(klass)) {
case T_CLASS:
case T_MODULE:
break;
default:
rb_raise(rb_eTypeError, "%s is not a class/module",
RSTRING_PTR(rb_inspect(klass)));
}
}
static inline VALUE
vm_get_ev_const(rb_thread_t *th, const rb_iseq_t *iseq,
VALUE orig_klass, ID id, int is_defined)
{
VALUE val;
if (orig_klass == Qnil) {
/* in current lexical scope */
const NODE *root_cref = vm_get_cref(iseq, th->cfp->lfp, th->cfp->dfp);
const NODE *cref = root_cref;
VALUE klass = orig_klass;
while (cref && cref->nd_next) {
klass = cref->nd_clss;
cref = cref->nd_next;
if (!NIL_P(klass)) {
search_continue:
if (RCLASS_IV_TBL(klass) &&
st_lookup(RCLASS_IV_TBL(klass), id, &val)) {
if (val == Qundef) {
rb_autoload_load(klass, id);
goto search_continue;
}
else {
if (is_defined) {
return 1;
}
else {
return val;
}
}
}
}
}
/* search self */
klass = root_cref->nd_clss;
if (NIL_P(klass)) {
klass = CLASS_OF(th->cfp->self);
}
if (is_defined) {
return rb_const_defined(klass, id);
}
else {
return rb_const_get(klass, id);
}
}
else {
vm_check_if_namespace(orig_klass);
if (is_defined) {
return rb_const_defined_from(orig_klass, id);
}
else {
return rb_const_get_from(orig_klass, id);
}
}
}
static inline VALUE
vm_get_cvar_base(NODE *cref)
{
VALUE klass;
while (cref && cref->nd_next &&
(NIL_P(cref->nd_clss) || FL_TEST(cref->nd_clss, FL_SINGLETON))) {
cref = cref->nd_next;
if (!cref->nd_next) {
rb_warn("class variable access from toplevel");
}
}
klass = cref->nd_clss;
if (NIL_P(klass)) {
rb_raise(rb_eTypeError, "no class variables available");
}
return klass;
}
static inline NODE *
vm_method_search(VALUE id, VALUE klass, IC ic)
{
NODE *mn;
#if OPT_INLINE_METHOD_CACHE
{
if (LIKELY(klass == ic->ic_class) &&
LIKELY(GET_VM_STATE_VERSION() == ic->ic_vmstat)) {
mn = ic->ic_method;
}
else {
mn = rb_method_node(klass, id);
ic->ic_class = klass;
ic->ic_method = mn;
ic->ic_vmstat = GET_VM_STATE_VERSION();
}
}
#else
mn = rb_method_node(klass, id);
#endif
return mn;
}
static inline VALUE
vm_search_normal_superclass(VALUE klass, VALUE recv)
{
if (BUILTIN_TYPE(klass) == T_CLASS) {
klass = RCLASS_SUPER(klass);
}
else if (BUILTIN_TYPE(klass) == T_MODULE) {
VALUE k = CLASS_OF(recv);
while (k) {
if (BUILTIN_TYPE(k) == T_ICLASS && RBASIC(k)->klass == klass) {
klass = RCLASS_SUPER(k);
break;
}
k = RCLASS_SUPER(k);
}
}
return klass;
}
static void
vm_search_superclass(rb_control_frame_t *reg_cfp, rb_iseq_t *ip,
VALUE recv, VALUE sigval,
ID *idp, VALUE *klassp)
{
ID id;
VALUE klass;
while (ip && !ip->klass) {
ip = ip->parent_iseq;
}
if (ip == 0) {
rb_raise(rb_eNoMethodError, "super called outside of method");
}
id = ip->defined_method_id;
if (ip != ip->local_iseq) {
/* defined by Module#define_method() */
rb_control_frame_t *lcfp = GET_CFP();
while (lcfp->iseq != ip) {
VALUE *tdfp = GET_PREV_DFP(lcfp->dfp);
while (1) {
lcfp = RUBY_VM_PREVIOUS_CONTROL_FRAME(lcfp);
if (lcfp->dfp == tdfp) {
break;
}
}
}
id = lcfp->method_id;
klass = vm_search_normal_superclass(lcfp->method_class, recv);
if (sigval == Qfalse) {
/* zsuper */
rb_raise(rb_eRuntimeError, "implicit argument passing of super from method defined by define_method() is not supported. Specify all arguments explicitly.");
}
}
else {
klass = vm_search_normal_superclass(ip->klass, recv);
}
*idp = id;
*klassp = klass;
}
static VALUE
vm_throw(rb_thread_t *th, rb_control_frame_t *reg_cfp,
rb_num_t throw_state, VALUE throwobj)
{
rb_num_t state = throw_state & 0xff;
rb_num_t flag = throw_state & 0x8000;
rb_num_t level = throw_state >> 16;
if (state != 0) {
VALUE *pt = 0;
int i;
if (flag != 0) {
pt = (void *) 1;
}
else {
if (state == TAG_BREAK) {
rb_control_frame_t *cfp = GET_CFP();
VALUE *dfp = GET_DFP();
int is_orphan = 1;
rb_iseq_t *base_iseq = GET_ISEQ();
search_parent:
if (cfp->iseq->type != ISEQ_TYPE_BLOCK) {
dfp = GC_GUARDED_PTR_REF((VALUE *) *dfp);
base_iseq = base_iseq->parent_iseq;
while ((VALUE *) cfp < th->stack + th->stack_size) {
if (cfp->dfp == dfp) {
goto search_parent;
}
cfp = RUBY_VM_PREVIOUS_CONTROL_FRAME(cfp);
}
rb_bug("VM (throw): can't find break base.");
}
if (VM_FRAME_TYPE(cfp) == VM_FRAME_MAGIC_LAMBDA) {
/* lambda{... break ...} */
is_orphan = 0;
pt = cfp->dfp;
state = TAG_RETURN;
}
else {
dfp = GC_GUARDED_PTR_REF((VALUE *) *dfp);
while ((VALUE *)cfp < th->stack + th->stack_size) {
if (cfp->dfp == dfp) {
VALUE epc = epc = cfp->pc - cfp->iseq->iseq_encoded;
rb_iseq_t *iseq = cfp->iseq;
int i;
for (i=0; i<iseq->catch_table_size; i++) {
struct iseq_catch_table_entry *entry = &iseq->catch_table[i];
if (entry->type == CATCH_TYPE_BREAK &&
entry->start < epc && entry->end >= epc) {
if (entry->cont == epc) {
goto found;
}
else {
break;
}
}
}
break;
found:
pt = dfp;
is_orphan = 0;
break;
}
cfp = RUBY_VM_PREVIOUS_CONTROL_FRAME(cfp);
}
}
if (is_orphan) {
vm_localjump_error("break from proc-closure", throwobj, TAG_BREAK);
}
}
else if (state == TAG_RETRY) {
pt = GC_GUARDED_PTR_REF((VALUE *) * GET_DFP());
for (i = 0; i < level; i++) {
pt = GC_GUARDED_PTR_REF((VALUE *) * pt);
}
}
else if (state == TAG_RETURN) {
rb_control_frame_t *cfp = GET_CFP();
VALUE *dfp = GET_DFP();
VALUE * const lfp = GET_LFP();
/* check orphan and get dfp */
while ((VALUE *) cfp < th->stack + th->stack_size) {
if (cfp->lfp == lfp) {
if (VM_FRAME_TYPE(cfp) == VM_FRAME_MAGIC_LAMBDA) {
VALUE *tdfp = dfp;
while (lfp != tdfp) {
if (cfp->dfp == tdfp) {
/* in lambda */
dfp = cfp->dfp;
goto valid_return;
}
tdfp = GC_GUARDED_PTR_REF((VALUE *)*dfp);
}
}
}
if (cfp->dfp == lfp && cfp->iseq->type == ISEQ_TYPE_METHOD) {
dfp = lfp;
goto valid_return;
}
cfp = RUBY_VM_PREVIOUS_CONTROL_FRAME(cfp);
}
vm_localjump_error("unexpected return", throwobj, TAG_RETURN);
valid_return:
pt = dfp;
}
else {
rb_bug("isns(throw): unsupport throw type");
}
}
th->state = state;
return (VALUE)NEW_THROW_OBJECT(throwobj, (VALUE) pt, state);
}
else {
/* continue throw */
VALUE err = throwobj;
if (FIXNUM_P(err)) {
th->state = FIX2INT(err);
}
else if (SYMBOL_P(err)) {
th->state = TAG_THROW;
}
else if (BUILTIN_TYPE(err) == T_NODE) {
th->state = GET_THROWOBJ_STATE(err);
}
else {
th->state = TAG_RAISE;
/*th->state = FIX2INT(rb_ivar_get(err, idThrowState));*/
}
return err;
}
}
static inline void
vm_expandarray(rb_control_frame_t *cfp, VALUE ary, int num, int flag)
{
int is_splat = flag & 0x01;
int space_size = num + is_splat;
VALUE *base = cfp->sp, *ptr;
volatile VALUE tmp_ary;
int len;
if (TYPE(ary) != T_ARRAY) {
ary = rb_ary_to_ary(ary);
}
cfp->sp += space_size;
tmp_ary = ary;
ptr = RARRAY_PTR(ary);
len = RARRAY_LEN(ary);
if (flag & 0x02) {
/* post: ..., nil ,ary[-1], ..., ary[0..-num] # top */
int i = 0, j;
if (len < num) {
for (i=0; i<num-len; i++) {
*base++ = Qnil;
}
}
for (j=0; i<num; i++, j++) {
VALUE v = ptr[len - j - 1];
*base++ = v;
}
if (is_splat) {
*base = rb_ary_new4(len - j, ptr);
}
}
else {
/* normal: ary[num..-1], ary[num-2], ary[num-3], ..., ary[0] # top */
int i;
VALUE *bptr = &base[space_size - 1];
for (i=0; i<num; i++) {
if (len <= i) {
for (; i<num; i++) {
*bptr-- = Qnil;
}
break;
}
*bptr-- = ptr[i];
}
if (is_splat) {
if (num > len) {
*bptr = rb_ary_new();
}
else {
*bptr = rb_ary_new4(len - num, ptr + num);
}
}
}
}
static inline int
check_cfunc(const NODE *mn, const void *func)
{
if (mn && nd_type(mn->nd_body) == NODE_CFUNC &&
mn->nd_body->nd_cfnc == func) {
return 1;
}
else {
return 0;
}
}
static
#ifndef NO_BIG_INLINE
inline
#endif
VALUE
opt_eq_func(VALUE recv, VALUE obj, IC ic)
{
VALUE val = Qundef;
if (FIXNUM_2_P(recv, obj) &&
BASIC_OP_UNREDEFINED_P(BOP_EQ)) {
if (recv == obj) {
val = Qtrue;
}
else {
val = Qfalse;
}
}
else if (!SPECIAL_CONST_P(recv) && !SPECIAL_CONST_P(obj)) {
if (HEAP_CLASS_OF(recv) == rb_cFloat &&
HEAP_CLASS_OF(obj) == rb_cFloat &&
BASIC_OP_UNREDEFINED_P(BOP_EQ)) {
double a = RFLOAT_VALUE(recv);
double b = RFLOAT_VALUE(obj);
if (isnan(a) || isnan(b)) {
val = Qfalse;
}
else if (a == b) {
val = Qtrue;
}
else {
val = Qfalse;
}
}
else if (HEAP_CLASS_OF(recv) == rb_cString &&
HEAP_CLASS_OF(obj) == rb_cString &&
BASIC_OP_UNREDEFINED_P(BOP_EQ)) {
val = rb_str_equal(recv, obj);
}
else {
NODE *mn = vm_method_search(idEq, CLASS_OF(recv), ic);
extern VALUE rb_obj_equal(VALUE obj1, VALUE obj2);
if (check_cfunc(mn, rb_obj_equal)) {
return recv == obj ? Qtrue : Qfalse;
}
}
}
return val;
}
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