forked from mruby/mruby
/
vm.c
1951 lines (1733 loc) · 46.9 KB
/
vm.c
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/*
** vm.c - virtual machine for mruby
**
** See Copyright Notice in mruby.h
*/
#include "mruby.h"
#include "opcode.h"
#include "mruby/irep.h"
#include "mruby/variable.h"
#include "mruby/proc.h"
#include "mruby/array.h"
#include "mruby/string.h"
#include "mruby/hash.h"
#include "mruby/range.h"
#include "mruby/class.h"
#include "mruby/numeric.h"
#include "error.h"
#include <stdio.h>
#include <string.h>
#include <setjmp.h>
#include <stddef.h>
#include <stdarg.h>
#define SET_TRUE_VALUE(r) MRB_SET_VALUE(r, MRB_TT_TRUE, value.i, 1)
#define SET_FALSE_VALUE(r) MRB_SET_VALUE(r, MRB_TT_FALSE, value.i, 1)
#define SET_NIL_VALUE(r) MRB_SET_VALUE(r, MRB_TT_FALSE, value.i, 0)
#define SET_INT_VALUE(r,n) MRB_SET_VALUE(r, MRB_TT_FIXNUM, value.i, (n))
#define SET_SYM_VALUE(r,v) MRB_SET_VALUE(r, MRB_TT_SYMBOL, value.sym, (v))
#define SET_OBJ_VALUE(r,v) MRB_SET_VALUE(r, (((struct RObject*)(v))->tt), value.p, (v))
#ifdef MRB_NAN_BOXING
#define SET_FLT_VALUE(r,v) r.f = (v)
#else
#define SET_FLT_VALUE(r,v) MRB_SET_VALUE(r, MRB_TT_FLOAT, value.f, (v))
#endif
#define STACK_INIT_SIZE 128
#define CALLINFO_INIT_SIZE 32
/* Define amount of linear stack growth. */
#ifndef MRB_STACK_GROWTH
#define MRB_STACK_GROWTH 128
#endif
/* Maximum stack depth. Should be set lower on memory constrained systems.
The value below allows about 60000 recursive calls in the simplest case. */
#ifndef MRB_STACK_MAX
#define MRB_STACK_MAX ((1<<18) - MRB_STACK_GROWTH)
#endif
#ifdef VM_DEBUG
# define DEBUG(x) (x)
#else
# define DEBUG(x)
#endif
static inline void
stack_copy(mrb_value *dst, const mrb_value *src, size_t size)
{
size_t i;
for (i = 0; i < size; i++) {
dst[i] = src[i];
}
}
static void
stack_init(mrb_state *mrb)
{
/* assert(mrb->stack == NULL); */
mrb->stbase = (mrb_value *)mrb_calloc(mrb, STACK_INIT_SIZE, sizeof(mrb_value));
mrb->stend = mrb->stbase + STACK_INIT_SIZE;
mrb->stack = mrb->stbase;
/* assert(mrb->ci == NULL); */
mrb->cibase = (mrb_callinfo *)mrb_calloc(mrb, CALLINFO_INIT_SIZE, sizeof(mrb_callinfo));
mrb->ciend = mrb->cibase + CALLINFO_INIT_SIZE;
mrb->ci = mrb->cibase;
mrb->ci->target_class = mrb->object_class;
}
static void
envadjust(mrb_state *mrb, mrb_value *oldbase, mrb_value *newbase)
{
mrb_callinfo *ci = mrb->cibase;
while (ci <= mrb->ci) {
struct REnv *e = ci->env;
if (e && e->cioff >= 0) {
int off = e->stack - oldbase;
e->stack = newbase + off;
}
ci++;
}
}
/** def rec ; $deep =+ 1 ; if $deep > 1000 ; return 0 ; end ; rec ; end */
static void
stack_extend(mrb_state *mrb, int room, int keep)
{
int size, off;
if (mrb->stack + room >= mrb->stend) {
mrb_value *oldbase = mrb->stbase;
size = mrb->stend - mrb->stbase;
off = mrb->stack - mrb->stbase;
/* do not leave uninitialized malloc region */
if (keep > size) keep = size;
/* Use linear stack growth.
It is slightly slower than doubling thestack space,
but it saves memory on small devices. */
if (room <= size)
size += MRB_STACK_GROWTH;
else
size += room;
mrb->stbase = (mrb_value *)mrb_realloc(mrb, mrb->stbase, sizeof(mrb_value) * size);
mrb->stack = mrb->stbase + off;
mrb->stend = mrb->stbase + size;
envadjust(mrb, oldbase, mrb->stbase);
/* Raise an exception if the new stack size will be too large,
to prevent infinite recursion. However, do this only after resizing the stack, so mrb_raisef has stack space to work with. */
if(size > MRB_STACK_MAX) {
mrb_raisef(mrb, E_RUNTIME_ERROR, "stack level too deep. (limit=%d)", MRB_STACK_MAX);
}
}
if (room > keep) {
int i;
for (i=keep; i<room; i++) {
#ifndef MRB_NAN_BOXING
static const mrb_value mrb_value_zero = { { 0 } };
mrb->stack[i] = mrb_value_zero;
#else
SET_NIL_VALUE(mrb->stack[i]);
#endif
}
}
}
int
mrb_checkstack(mrb_state *mrb, int size)
{
stack_extend(mrb, size+1, 1);
return 0;
}
struct REnv*
uvenv(mrb_state *mrb, int up)
{
struct REnv *e = mrb->ci->proc->env;
while (up--) {
if (!e) return 0;
e = (struct REnv*)e->c;
}
return e;
}
static mrb_value
uvget(mrb_state *mrb, int up, int idx)
{
struct REnv *e = uvenv(mrb, up);
if (!e) return mrb_nil_value();
return e->stack[idx];
}
static void
uvset(mrb_state *mrb, int up, int idx, mrb_value v)
{
struct REnv *e = uvenv(mrb, up);
if (!e) return;
e->stack[idx] = v;
mrb_write_barrier(mrb, (struct RBasic*)e);
}
static inline int
is_strict(mrb_state *mrb, struct REnv *e)
{
int cioff = e->cioff;
if (cioff >= 0 && mrb->cibase[cioff].proc &&
MRB_PROC_STRICT_P(mrb->cibase[cioff].proc)) {
return 1;
}
return 0;
}
struct REnv*
top_env(mrb_state *mrb, struct RProc *proc)
{
struct REnv *e = proc->env;
if (is_strict(mrb, e)) return e;
while (e->c) {
e = (struct REnv*)e->c;
if (is_strict(mrb, e)) return e;
}
return e;
}
static mrb_callinfo*
cipush(mrb_state *mrb)
{
int eidx = mrb->ci->eidx;
int ridx = mrb->ci->ridx;
if (mrb->ci + 1 == mrb->ciend) {
size_t size = mrb->ci - mrb->cibase;
mrb->cibase = (mrb_callinfo *)mrb_realloc(mrb, mrb->cibase, sizeof(mrb_callinfo)*size*2);
mrb->ci = mrb->cibase + size;
mrb->ciend = mrb->cibase + size * 2;
}
mrb->ci++;
mrb->ci->nregs = 2; /* protect method_missing arg and block */
mrb->ci->eidx = eidx;
mrb->ci->ridx = ridx;
mrb->ci->env = 0;
return mrb->ci;
}
static void
cipop(mrb_state *mrb)
{
if (mrb->ci->env) {
struct REnv *e = mrb->ci->env;
int len = (int)e->flags;
mrb_value *p = (mrb_value *)mrb_malloc(mrb, sizeof(mrb_value)*len);
e->cioff = -1;
stack_copy(p, e->stack, len);
e->stack = p;
}
mrb->ci--;
}
static void
ecall(mrb_state *mrb, int i)
{
struct RProc *p;
mrb_callinfo *ci;
mrb_value *self = mrb->stack;
struct RObject *exc;
p = mrb->ensure[i];
ci = cipush(mrb);
ci->stackidx = mrb->stack - mrb->stbase;
ci->mid = ci[-1].mid;
ci->acc = -1;
ci->argc = 0;
ci->proc = p;
ci->nregs = p->body.irep->nregs;
ci->target_class = p->target_class;
mrb->stack = mrb->stack + ci[-1].nregs;
exc = mrb->exc; mrb->exc = 0;
mrb_run(mrb, p, *self);
if (!mrb->exc) mrb->exc = exc;
}
#ifndef MRB_FUNCALL_ARGC_MAX
#define MRB_FUNCALL_ARGC_MAX 16
#endif
mrb_value
mrb_funcall(mrb_state *mrb, mrb_value self, const char *name, int argc, ...)
{
mrb_sym mid = mrb_intern(mrb, name);
va_list ap;
int i;
if (argc == 0) {
return mrb_funcall_argv(mrb, self, mid, 0, 0);
}
else if (argc == 1) {
mrb_value v;
va_start(ap, argc);
v = va_arg(ap, mrb_value);
va_end(ap);
return mrb_funcall_argv(mrb, self, mid, 1, &v);
}
else {
mrb_value argv[MRB_FUNCALL_ARGC_MAX];
if (argc > MRB_FUNCALL_ARGC_MAX) {
mrb_raisef(mrb, E_ARGUMENT_ERROR, "Too long arguments. (limit=%d)", MRB_FUNCALL_ARGC_MAX);
}
va_start(ap, argc);
for (i = 0; i < argc; i++) {
argv[i] = va_arg(ap, mrb_value);
}
va_end(ap);
return mrb_funcall_argv(mrb, self, mid, argc, argv);
}
}
mrb_value
mrb_funcall_with_block(mrb_state *mrb, mrb_value self, mrb_sym mid, int argc, mrb_value *argv, mrb_value blk)
{
struct RProc *p;
struct RClass *c;
mrb_sym undef = 0;
mrb_callinfo *ci;
int n;
mrb_value val;
if (!mrb->jmp) {
jmp_buf c_jmp;
if (setjmp(c_jmp) != 0) { /* error */
mrb->jmp = 0;
return mrb_nil_value();
}
mrb->jmp = &c_jmp;
/* recursive call */
val = mrb_funcall_with_block(mrb, self, mid, argc, argv, blk);
mrb->jmp = 0;
return val;
}
if (!mrb->stack) {
stack_init(mrb);
}
n = mrb->ci->nregs;
if (argc < 0) {
mrb_raisef(mrb, E_ARGUMENT_ERROR, "negative argc for funcall (%d)", argc);
}
c = mrb_class(mrb, self);
p = mrb_method_search_vm(mrb, &c, mid);
if (!p) {
undef = mid;
mid = mrb_intern(mrb, "method_missing");
p = mrb_method_search_vm(mrb, &c, mid);
n++; argc++;
}
ci = cipush(mrb);
ci->mid = mid;
ci->proc = p;
ci->stackidx = mrb->stack - mrb->stbase;
ci->argc = argc;
ci->target_class = p->target_class;
if (MRB_PROC_CFUNC_P(p)) {
ci->nregs = argc + 2;
}
else {
ci->nregs = p->body.irep->nregs + 2;
}
ci->acc = -1;
mrb->stack = mrb->stack + n;
stack_extend(mrb, ci->nregs, 0);
mrb->stack[0] = self;
if (undef) {
mrb->stack[1] = mrb_symbol_value(undef);
stack_copy(mrb->stack+2, argv, argc-1);
}
else if (argc > 0) {
stack_copy(mrb->stack+1, argv, argc);
}
mrb->stack[argc+1] = blk;
if (MRB_PROC_CFUNC_P(p)) {
int ai = mrb_gc_arena_save(mrb);
val = p->body.func(mrb, self);
mrb_gc_arena_restore(mrb, ai);
mrb_gc_protect(mrb, val);
mrb->stack = mrb->stbase + mrb->ci->stackidx;
cipop(mrb);
}
else {
val = mrb_run(mrb, p, self);
}
return val;
}
mrb_value
mrb_funcall_argv(mrb_state *mrb, mrb_value self, mrb_sym mid, int argc, mrb_value *argv)
{
return mrb_funcall_with_block(mrb, self, mid, argc, argv, mrb_nil_value());
}
mrb_value
mrb_yield_internal(mrb_state *mrb, mrb_value b, int argc, mrb_value *argv, mrb_value self, struct RClass *c)
{
struct RProc *p;
mrb_sym mid = mrb->ci->mid;
mrb_callinfo *ci;
int n = mrb->ci->nregs;
mrb_value val;
p = mrb_proc_ptr(b);
ci = cipush(mrb);
ci->mid = mid;
ci->proc = p;
ci->stackidx = mrb->stack - mrb->stbase;
ci->argc = argc;
ci->target_class = c;
if (MRB_PROC_CFUNC_P(p)) {
ci->nregs = argc + 2;
}
else {
ci->nregs = p->body.irep->nregs + 2;
}
ci->acc = -1;
mrb->stack = mrb->stack + n;
stack_extend(mrb, ci->nregs, 0);
mrb->stack[0] = self;
if (argc > 0) {
stack_copy(mrb->stack+1, argv, argc);
}
mrb->stack[argc+1] = mrb_nil_value();
if (MRB_PROC_CFUNC_P(p)) {
val = p->body.func(mrb, self);
mrb->stack = mrb->stbase + mrb->ci->stackidx;
cipop(mrb);
}
else {
val = mrb_run(mrb, p, self);
}
return val;
}
mrb_value
mrb_yield_argv(mrb_state *mrb, mrb_value b, int argc, mrb_value *argv)
{
struct RProc *p = mrb_proc_ptr(b);
return mrb_yield_internal(mrb, b, argc, argv, mrb->stack[0], p->target_class);
}
mrb_value
mrb_yield(mrb_state *mrb, mrb_value b, mrb_value v)
{
struct RProc *p = mrb_proc_ptr(b);
return mrb_yield_internal(mrb, b, 1, &v, mrb->stack[0], p->target_class);
}
static void
localjump_error(mrb_state *mrb, const char *kind)
{
char buf[256];
int len;
mrb_value exc;
len = snprintf(buf, sizeof(buf), "unexpected %s", kind);
exc = mrb_exc_new(mrb, E_LOCALJUMP_ERROR, buf, len);
mrb->exc = (struct RObject*)mrb_object(exc);
}
static void
argnum_error(mrb_state *mrb, int num)
{
char buf[256];
int len;
mrb_value exc;
if (mrb->ci->mid) {
len = snprintf(buf, sizeof(buf), "'%s': wrong number of arguments (%d for %d)",
mrb_sym2name(mrb, mrb->ci->mid),
mrb->ci->argc, num);
}
else {
len = snprintf(buf, sizeof(buf), "wrong number of arguments (%d for %d)",
mrb->ci->argc, num);
}
exc = mrb_exc_new(mrb, E_ARGUMENT_ERROR, buf, len);
mrb->exc = (struct RObject*)mrb_object(exc);
}
#ifdef ENABLE_DEBUG
#define CODE_FETCH_HOOK(mrb, irep, pc, regs) ((mrb)->code_fetch_hook ? (mrb)->code_fetch_hook((mrb), (irep), (pc), (regs)) : NULL)
#else
#define CODE_FETCH_HOOK(mrb, irep, pc, regs)
#endif
#ifdef __GNUC__
#define DIRECT_THREADED
#endif
#ifndef DIRECT_THREADED
#define INIT_DISPATCH for (;;) { i = *pc; CODE_FETCH_HOOK(mrb, irep, pc, regs); switch (GET_OPCODE(i)) {
#define CASE(op) case op:
#define NEXT pc++; break
#define JUMP break
#define END_DISPATCH }}
#else
#define INIT_DISPATCH JUMP; return mrb_nil_value();
#define CASE(op) L_ ## op:
#define NEXT i=*++pc; CODE_FETCH_HOOK(mrb, irep, pc, regs); goto *optable[GET_OPCODE(i)]
#define JUMP i=*pc; CODE_FETCH_HOOK(mrb, irep, pc, regs); goto *optable[GET_OPCODE(i)]
#define END_DISPATCH
#endif
mrb_value mrb_gv_val_get(mrb_state *mrb, mrb_sym sym);
void mrb_gv_val_set(mrb_state *mrb, mrb_sym sym, mrb_value val);
#define CALL_MAXARGS 127
mrb_value
mrb_run(mrb_state *mrb, struct RProc *proc, mrb_value self)
{
/* assert(mrb_proc_cfunc_p(proc)) */
mrb_irep *irep = proc->body.irep;
mrb_code *pc = irep->iseq;
mrb_value *pool = irep->pool;
mrb_sym *syms = irep->syms;
mrb_value *regs = NULL;
mrb_code i;
int ai = mrb_gc_arena_save(mrb);
jmp_buf *prev_jmp = (jmp_buf *)mrb->jmp;
jmp_buf c_jmp;
#ifdef DIRECT_THREADED
static void *optable[] = {
&&L_OP_NOP, &&L_OP_MOVE,
&&L_OP_LOADL, &&L_OP_LOADI, &&L_OP_LOADSYM, &&L_OP_LOADNIL,
&&L_OP_LOADSELF, &&L_OP_LOADT, &&L_OP_LOADF,
&&L_OP_GETGLOBAL, &&L_OP_SETGLOBAL, &&L_OP_GETSPECIAL, &&L_OP_SETSPECIAL,
&&L_OP_GETIV, &&L_OP_SETIV, &&L_OP_GETCV, &&L_OP_SETCV,
&&L_OP_GETCONST, &&L_OP_SETCONST, &&L_OP_GETMCNST, &&L_OP_SETMCNST,
&&L_OP_GETUPVAR, &&L_OP_SETUPVAR,
&&L_OP_JMP, &&L_OP_JMPIF, &&L_OP_JMPNOT,
&&L_OP_ONERR, &&L_OP_RESCUE, &&L_OP_POPERR, &&L_OP_RAISE, &&L_OP_EPUSH, &&L_OP_EPOP,
&&L_OP_SEND, &&L_OP_SENDB, &&L_OP_FSEND,
&&L_OP_CALL, &&L_OP_SUPER, &&L_OP_ARGARY, &&L_OP_ENTER,
&&L_OP_KARG, &&L_OP_KDICT, &&L_OP_RETURN, &&L_OP_TAILCALL, &&L_OP_BLKPUSH,
&&L_OP_ADD, &&L_OP_ADDI, &&L_OP_SUB, &&L_OP_SUBI, &&L_OP_MUL, &&L_OP_DIV,
&&L_OP_EQ, &&L_OP_LT, &&L_OP_LE, &&L_OP_GT, &&L_OP_GE,
&&L_OP_ARRAY, &&L_OP_ARYCAT, &&L_OP_ARYPUSH, &&L_OP_AREF, &&L_OP_ASET, &&L_OP_APOST,
&&L_OP_STRING, &&L_OP_STRCAT, &&L_OP_HASH,
&&L_OP_LAMBDA, &&L_OP_RANGE, &&L_OP_OCLASS,
&&L_OP_CLASS, &&L_OP_MODULE, &&L_OP_EXEC,
&&L_OP_METHOD, &&L_OP_SCLASS, &&L_OP_TCLASS,
&&L_OP_DEBUG, &&L_OP_STOP, &&L_OP_ERR,
};
#endif
if (setjmp(c_jmp) == 0) {
mrb->jmp = &c_jmp;
}
else {
goto L_RAISE;
}
if (!mrb->stack) {
stack_init(mrb);
}
stack_extend(mrb, irep->nregs, irep->nregs);
mrb->ci->proc = proc;
mrb->ci->nregs = irep->nregs + 2;
regs = mrb->stack;
regs[0] = self;
INIT_DISPATCH {
CASE(OP_NOP) {
/* do nothing */
NEXT;
}
CASE(OP_MOVE) {
/* A B R(A) := R(B) */
regs[GETARG_A(i)] = regs[GETARG_B(i)];
NEXT;
}
CASE(OP_LOADL) {
/* A Bx R(A) := Pool(Bx) */
regs[GETARG_A(i)] = pool[GETARG_Bx(i)];
NEXT;
}
CASE(OP_LOADI) {
/* A Bx R(A) := sBx */
SET_INT_VALUE(regs[GETARG_A(i)], GETARG_sBx(i));
NEXT;
}
CASE(OP_LOADSYM) {
/* A B R(A) := Sym(B) */
SET_SYM_VALUE(regs[GETARG_A(i)], syms[GETARG_Bx(i)]);
NEXT;
}
CASE(OP_LOADSELF) {
/* A R(A) := self */
regs[GETARG_A(i)] = regs[0];
NEXT;
}
CASE(OP_LOADT) {
/* A R(A) := true */
SET_TRUE_VALUE(regs[GETARG_A(i)]);
NEXT;
}
CASE(OP_LOADF) {
/* A R(A) := false */
SET_FALSE_VALUE(regs[GETARG_A(i)]);
NEXT;
}
CASE(OP_GETGLOBAL) {
/* A B R(A) := getglobal(Sym(B)) */
regs[GETARG_A(i)] = mrb_gv_get(mrb, syms[GETARG_Bx(i)]);
NEXT;
}
CASE(OP_SETGLOBAL) {
/* setglobal(Sym(b), R(A)) */
mrb_gv_set(mrb, syms[GETARG_Bx(i)], regs[GETARG_A(i)]);
NEXT;
}
CASE(OP_GETSPECIAL) {
/* A Bx R(A) := Special[Bx] */
regs[GETARG_A(i)] = mrb_vm_special_get(mrb, GETARG_Bx(i));
NEXT;
}
CASE(OP_SETSPECIAL) {
/* A Bx Special[Bx] := R(A) */
mrb_vm_special_set(mrb, GETARG_Bx(i), regs[GETARG_A(i)]);
NEXT;
}
CASE(OP_GETIV) {
/* A Bx R(A) := ivget(Bx) */
regs[GETARG_A(i)] = mrb_vm_iv_get(mrb, syms[GETARG_Bx(i)]);
NEXT;
}
CASE(OP_SETIV) {
/* ivset(Sym(B),R(A)) */
mrb_vm_iv_set(mrb, syms[GETARG_Bx(i)], regs[GETARG_A(i)]);
NEXT;
}
CASE(OP_GETCV) {
/* A B R(A) := ivget(Sym(B)) */
regs[GETARG_A(i)] = mrb_vm_cv_get(mrb, syms[GETARG_Bx(i)]);
NEXT;
}
CASE(OP_SETCV) {
/* ivset(Sym(B),R(A)) */
mrb_vm_cv_set(mrb, syms[GETARG_Bx(i)], regs[GETARG_A(i)]);
NEXT;
}
CASE(OP_GETCONST) {
/* A B R(A) := constget(Sym(B)) */
regs[GETARG_A(i)] = mrb_vm_const_get(mrb, syms[GETARG_Bx(i)]);
NEXT;
}
CASE(OP_SETCONST) {
/* A B constset(Sym(B),R(A)) */
mrb_vm_const_set(mrb, syms[GETARG_Bx(i)], regs[GETARG_A(i)]);
NEXT;
}
CASE(OP_GETMCNST) {
/* A B C R(A) := R(C)::Sym(B) */
int a = GETARG_A(i);
regs[a] = mrb_const_get(mrb, regs[a], syms[GETARG_Bx(i)]);
NEXT;
}
CASE(OP_SETMCNST) {
/* A B C R(A+1)::Sym(B) := R(A) */
int a = GETARG_A(i);
mrb_const_set(mrb, regs[a+1], syms[GETARG_Bx(i)], regs[a]);
NEXT;
}
CASE(OP_GETUPVAR) {
/* A B C R(A) := uvget(B,C) */
regs[GETARG_A(i)] = uvget(mrb, GETARG_C(i), GETARG_B(i));
NEXT;
}
CASE(OP_SETUPVAR) {
/* A B C uvset(B,C,R(A)) */
uvset(mrb, GETARG_C(i), GETARG_B(i), regs[GETARG_A(i)]);
NEXT;
}
CASE(OP_JMP) {
/* sBx pc+=sBx */
pc += GETARG_sBx(i);
JUMP;
}
CASE(OP_JMPIF) {
/* A sBx if R(A) pc+=sBx */
if (mrb_test(regs[GETARG_A(i)])) {
pc += GETARG_sBx(i);
JUMP;
}
NEXT;
}
CASE(OP_JMPNOT) {
/* A sBx if R(A) pc+=sBx */
if (!mrb_test(regs[GETARG_A(i)])) {
pc += GETARG_sBx(i);
JUMP;
}
NEXT;
}
CASE(OP_ONERR) {
/* sBx pc+=sBx on exception */
if (mrb->rsize <= mrb->ci->ridx) {
if (mrb->rsize == 0) mrb->rsize = 16;
else mrb->rsize *= 2;
mrb->rescue = (mrb_code **)mrb_realloc(mrb, mrb->rescue, sizeof(mrb_code*) * mrb->rsize);
}
mrb->rescue[mrb->ci->ridx++] = pc + GETARG_sBx(i);
NEXT;
}
CASE(OP_RESCUE) {
/* A R(A) := exc; clear(exc) */
SET_OBJ_VALUE(regs[GETARG_A(i)], mrb->exc);
mrb->exc = 0;
NEXT;
}
CASE(OP_POPERR) {
int a = GETARG_A(i);
while (a--) {
mrb->ci->ridx--;
}
NEXT;
}
CASE(OP_RAISE) {
/* A raise(R(A)) */
mrb->exc = (struct RObject*)mrb_object(regs[GETARG_A(i)]);
goto L_RAISE;
}
CASE(OP_EPUSH) {
/* Bx ensure_push(SEQ[Bx]) */
struct RProc *p;
p = mrb_closure_new(mrb, mrb->irep[irep->idx+GETARG_Bx(i)]);
/* push ensure_stack */
if (mrb->esize <= mrb->ci->eidx) {
if (mrb->esize == 0) mrb->esize = 16;
else mrb->esize *= 2;
mrb->ensure = (struct RProc **)mrb_realloc(mrb, mrb->ensure, sizeof(struct RProc*) * mrb->esize);
}
mrb->ensure[mrb->ci->eidx++] = p;
mrb_gc_arena_restore(mrb, ai);
NEXT;
}
CASE(OP_EPOP) {
/* A A.times{ensure_pop().call} */
int n;
int a = GETARG_A(i);
for (n=0; n<a; n++) {
ecall(mrb, --mrb->ci->eidx);
}
mrb_gc_arena_restore(mrb, ai);
NEXT;
}
CASE(OP_LOADNIL) {
/* A B R(A) := nil */
int a = GETARG_A(i);
SET_NIL_VALUE(regs[a]);
NEXT;
}
CASE(OP_SENDB) {
/* fall through */
};
L_SEND:
CASE(OP_SEND) {
/* A B C R(A) := call(R(A),Sym(B),R(A+1),... ,R(A+C-1)) */
int a = GETARG_A(i);
int n = GETARG_C(i);
struct RProc *m;
struct RClass *c;
mrb_callinfo *ci;
mrb_value recv, result;
mrb_sym mid = syms[GETARG_B(i)];
recv = regs[a];
if (GET_OPCODE(i) != OP_SENDB) {
if (n == CALL_MAXARGS) {
SET_NIL_VALUE(regs[a+2]);
}
else {
SET_NIL_VALUE(regs[a+n+1]);
}
}
c = mrb_class(mrb, recv);
m = mrb_method_search_vm(mrb, &c, mid);
if (!m) {
mrb_value sym = mrb_symbol_value(mid);
mid = mrb_intern(mrb, "method_missing");
m = mrb_method_search_vm(mrb, &c, mid);
if (n == CALL_MAXARGS) {
mrb_ary_unshift(mrb, regs[a+1], sym);
}
else {
memmove(regs+a+2, regs+a+1, sizeof(mrb_value)*(n+1));
regs[a+1] = sym;
n++;
}
}
/* push callinfo */
ci = cipush(mrb);
ci->mid = mid;
ci->proc = m;
ci->stackidx = mrb->stack - mrb->stbase;
ci->argc = n;
if (ci->argc == CALL_MAXARGS) ci->argc = -1;
ci->target_class = c;
ci->pc = pc + 1;
ci->acc = a;
/* prepare stack */
mrb->stack += a;
if (MRB_PROC_CFUNC_P(m)) {
if (n == CALL_MAXARGS) {
ci->nregs = 3;
}
else {
ci->nregs = n + 2;
}
result = m->body.func(mrb, recv);
mrb->stack[0] = result;
mrb_gc_arena_restore(mrb, ai);
if (mrb->exc) goto L_RAISE;
/* pop stackpos */
regs = mrb->stack = mrb->stbase + mrb->ci->stackidx;
cipop(mrb);
NEXT;
}
else {
/* setup environment for calling method */
proc = mrb->ci->proc = m;
irep = m->body.irep;
pool = irep->pool;
syms = irep->syms;
ci->nregs = irep->nregs;
if (ci->argc < 0) {
stack_extend(mrb, (irep->nregs < 3) ? 3 : irep->nregs, 3);
}
else {
stack_extend(mrb, irep->nregs, ci->argc+2);
}
regs = mrb->stack;
pc = irep->iseq;
JUMP;
}
}
CASE(OP_FSEND) {
/* A B C R(A) := fcall(R(A),Sym(B),R(A+1),... ,R(A+C)) */
NEXT;
}
CASE(OP_CALL) {
/* A R(A) := self.call(frame.argc, frame.argv) */
mrb_callinfo *ci;
mrb_value recv = mrb->stack[0];
struct RProc *m = mrb_proc_ptr(recv);
/* replace callinfo */
ci = mrb->ci;
ci->target_class = m->target_class;
ci->proc = m;
if (m->env) {
if (m->env->mid) {
ci->mid = m->env->mid;
}
if (!m->env->stack) {
m->env->stack = mrb->stack;
}
}
/* prepare stack */
if (MRB_PROC_CFUNC_P(m)) {
recv = m->body.func(mrb, recv);
mrb_gc_arena_restore(mrb, ai);
if (mrb->exc) goto L_RAISE;
/* pop stackpos */
ci = mrb->ci;
regs = mrb->stack = mrb->stbase + ci->stackidx;
regs[ci->acc] = recv;
pc = ci->pc;
cipop(mrb);
irep = mrb->ci->proc->body.irep;
pool = irep->pool;
syms = irep->syms;
JUMP;
}
else {
/* setup environment for calling method */
proc = m;
irep = m->body.irep;
if (!irep) {
mrb->stack[0] = mrb_nil_value();
goto L_RETURN;
}
pool = irep->pool;
syms = irep->syms;
ci->nregs = irep->nregs;
if (ci->argc < 0) {
stack_extend(mrb, (irep->nregs < 3) ? 3 : irep->nregs, 3);
}
else {
stack_extend(mrb, irep->nregs, ci->argc+2);
}
regs = mrb->stack;
regs[0] = m->env->stack[0];
pc = m->body.irep->iseq;
JUMP;
}
}
CASE(OP_SUPER) {
/* A B C R(A) := super(R(A+1),... ,R(A+C-1)) */
mrb_value recv;
mrb_callinfo *ci = mrb->ci;
struct RProc *m;
struct RClass *c;
mrb_sym mid = ci->mid;
int a = GETARG_A(i);
int n = GETARG_C(i);
recv = regs[0];
c = mrb->ci->target_class->super;
m = mrb_method_search_vm(mrb, &c, mid);
if (!m) {
mid = mrb_intern(mrb, "method_missing");
m = mrb_method_search_vm(mrb, &c, mid);
if (n == CALL_MAXARGS) {
mrb_ary_unshift(mrb, regs[a+1], mrb_symbol_value(ci->mid));
}
else {
memmove(regs+a+2, regs+a+1, sizeof(mrb_value)*(n+1));
SET_SYM_VALUE(regs[a+1], ci->mid);
n++;
}
}
/* push callinfo */
ci = cipush(mrb);
ci->mid = mid;
ci->proc = m;
ci->stackidx = mrb->stack - mrb->stbase;
ci->argc = n;
if (ci->argc == CALL_MAXARGS) ci->argc = -1;
ci->target_class = m->target_class;
ci->pc = pc + 1;
/* prepare stack */
mrb->stack += a;
mrb->stack[0] = recv;
if (MRB_PROC_CFUNC_P(m)) {
mrb->stack[0] = m->body.func(mrb, recv);
mrb_gc_arena_restore(mrb, ai);
if (mrb->exc) goto L_RAISE;
/* pop stackpos */