/*
** vm.c - virtual machine for mruby
**
** See Copyright Notice in mruby.h
*/
#include <stddef.h>
#include <stdarg.h>
#include <math.h>
#include <mruby.h>
#include <mruby/array.h>
#include <mruby/class.h>
#include <mruby/hash.h>
#include <mruby/irep.h>
#include <mruby/numeric.h>
#include <mruby/proc.h>
#include <mruby/range.h>
#include <mruby/string.h>
#include <mruby/variable.h>
#include <mruby/error.h>
#include <mruby/opcode.h>
#include "value_array.h"
#include <mruby/throw.h>
#ifdef MRB_DISABLE_STDIO
#if defined(__cplusplus)
extern "C" {
#endif
void abort(void);
#if defined(__cplusplus)
} /* extern "C" { */
#endif
#endif
#define STACK_INIT_SIZE 128
#define CALLINFO_INIT_SIZE 32
#ifndef ENSURE_STACK_INIT_SIZE
#define ENSURE_STACK_INIT_SIZE 16
#endif
#ifndef RESCUE_STACK_INIT_SIZE
#define RESCUE_STACK_INIT_SIZE 16
#endif
/* Define amount of linear stack growth. */
#ifndef MRB_STACK_GROWTH
#define MRB_STACK_GROWTH 128
#endif
/* Maximum mrb_funcall() depth. Should be set lower on memory constrained systems. */
#ifndef MRB_FUNCALL_DEPTH_MAX
#define MRB_FUNCALL_DEPTH_MAX 512
#endif
/* Maximum depth of ecall() recursion. */
#ifndef MRB_ECALL_DEPTH_MAX
#define MRB_ECALL_DEPTH_MAX 32
#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 (0x40000 - MRB_STACK_GROWTH)
#endif
#ifdef VM_DEBUG
# define DEBUG(x) (x)
#else
# define DEBUG(x)
#endif
#ifndef MRB_GC_FIXED_ARENA
static void
mrb_gc_arena_shrink(mrb_state *mrb, int idx)
{
mrb_gc *gc = &mrb->gc;
int capa = gc->arena_capa;
if (idx < capa / 4) {
capa >>= 2;
if (capa < MRB_GC_ARENA_SIZE) {
capa = MRB_GC_ARENA_SIZE;
}
if (capa != gc->arena_capa) {
gc->arena = (struct RBasic**)mrb_realloc(mrb, gc->arena, sizeof(struct RBasic*)*capa);
gc->arena_capa = capa;
}
}
}
#else
#define mrb_gc_arena_shrink(mrb,idx)
#endif
#define CALL_MAXARGS 127
void mrb_method_missing(mrb_state *mrb, mrb_sym name, mrb_value self, mrb_value args);
static inline void
stack_clear(mrb_value *from, size_t count)
{
#ifndef MRB_NAN_BOXING
const mrb_value mrb_value_zero = { { 0 } };
while (count-- > 0) {
*from++ = mrb_value_zero;
}
#else
while (count-- > 0) {
SET_NIL_VALUE(*from);
from++;
}
#endif
}
static inline void
stack_copy(mrb_value *dst, const mrb_value *src, size_t size)
{
while (size-- > 0) {
*dst++ = *src++;
}
}
static void
stack_init(mrb_state *mrb)
{
struct mrb_context *c = mrb->c;
/* mrb_assert(mrb->stack == NULL); */
c->stbase = (mrb_value *)mrb_calloc(mrb, STACK_INIT_SIZE, sizeof(mrb_value));
c->stend = c->stbase + STACK_INIT_SIZE;
c->stack = c->stbase;
/* mrb_assert(ci == NULL); */
c->cibase = (mrb_callinfo *)mrb_calloc(mrb, CALLINFO_INIT_SIZE, sizeof(mrb_callinfo));
c->ciend = c->cibase + CALLINFO_INIT_SIZE;
c->ci = c->cibase;
c->ci->target_class = mrb->object_class;
c->ci->stackent = c->stack;
}
static inline void
envadjust(mrb_state *mrb, mrb_value *oldbase, mrb_value *newbase, size_t size)
{
mrb_callinfo *ci = mrb->c->cibase;
if (newbase == oldbase) return;
while (ci <= mrb->c->ci) {
struct REnv *e = ci->env;
mrb_value *st;
if (e && MRB_ENV_STACK_SHARED_P(e) &&
(st = e->stack) && oldbase <= st && st < oldbase+size) {
ptrdiff_t off = e->stack - oldbase;
e->stack = newbase + off;
}
ci->stackent = newbase + (ci->stackent - oldbase);
ci++;
}
}
/** def rec ; $deep =+ 1 ; if $deep > 1000 ; return 0 ; end ; rec ; end */
static void
stack_extend_alloc(mrb_state *mrb, int room)
{
mrb_value *oldbase = mrb->c->stbase;
mrb_value *newstack;
size_t oldsize = mrb->c->stend - mrb->c->stbase;
size_t size = oldsize;
size_t off = mrb->c->stack - mrb->c->stbase;
if (off > size) size = off;
#ifdef MRB_STACK_EXTEND_DOUBLING
if (room <= size)
size *= 2;
else
size += room;
#else
/* Use linear stack growth.
It is slightly slower than doubling the stack space,
but it saves memory on small devices. */
if (room <= MRB_STACK_GROWTH)
size += MRB_STACK_GROWTH;
else
size += room;
#endif
newstack = (mrb_value *)mrb_realloc(mrb, mrb->c->stbase, sizeof(mrb_value) * size);
if (newstack == NULL) {
mrb_exc_raise(mrb, mrb_obj_value(mrb->stack_err));
}
stack_clear(&(newstack[oldsize]), size - oldsize);
envadjust(mrb, oldbase, newstack, size);
mrb->c->stbase = newstack;
mrb->c->stack = mrb->c->stbase + off;
mrb->c->stend = mrb->c->stbase + size;
/* 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_raise has stack space to work with. */
if (size > MRB_STACK_MAX) {
mrb_exc_raise(mrb, mrb_obj_value(mrb->stack_err));
}
}
static inline void
stack_extend(mrb_state *mrb, int room)
{
if (mrb->c->stack + room >= mrb->c->stend) {
stack_extend_alloc(mrb, room);
}
}
static inline struct REnv*
uvenv(mrb_state *mrb, int up)
{
struct RProc *proc = mrb->c->ci->proc;
struct REnv *e;
while (up--) {
proc = proc->upper;
if (!proc) return NULL;
}
e = MRB_PROC_ENV(proc);
if (e) return e; /* proc has enclosed env */
else {
mrb_callinfo *ci = mrb->c->ci;
mrb_callinfo *cb = mrb->c->cibase;
while (cb <= ci) {
if (ci->proc == proc) {
return ci->env;
}
ci--;
}
}
return NULL;
}
static inline struct RProc*
top_proc(mrb_state *mrb, struct RProc *proc)
{
while (proc->upper) {
if (MRB_PROC_SCOPE_P(proc) || MRB_PROC_STRICT_P(proc))
return proc;
proc = proc->upper;
}
return proc;
}
#define CI_ACC_SKIP -1
#define CI_ACC_DIRECT -2
#define CI_ACC_RESUMED -3
static inline mrb_callinfo*
cipush(mrb_state *mrb)
{
struct mrb_context *c = mrb->c;
static const mrb_callinfo ci_zero = { 0 };
mrb_callinfo *ci = c->ci;
int ridx = ci->ridx;
if (ci + 1 == c->ciend) {
ptrdiff_t size = ci - c->cibase;
c->cibase = (mrb_callinfo *)mrb_realloc(mrb, c->cibase, sizeof(mrb_callinfo)*size*2);
c->ci = c->cibase + size;
c->ciend = c->cibase + size * 2;
}
ci = ++c->ci;
*ci = ci_zero;
ci->epos = mrb->c->eidx;
ci->ridx = ridx;
return ci;
}
void
mrb_env_unshare(mrb_state *mrb, struct REnv *e)
{
if (e == NULL) return;
else {
size_t len = (size_t)MRB_ENV_STACK_LEN(e);
mrb_value *p;
if (!MRB_ENV_STACK_SHARED_P(e)) return;
if (e->cxt != mrb->c) return;
p = (mrb_value *)mrb_malloc(mrb, sizeof(mrb_value)*len);
if (len > 0) {
stack_copy(p, e->stack, len);
}
e->stack = p;
MRB_ENV_UNSHARE_STACK(e);
mrb_write_barrier(mrb, (struct RBasic *)e);
}
}
static inline void
cipop(mrb_state *mrb)
{
struct mrb_context *c = mrb->c;
struct REnv *env = c->ci->env;
c->ci--;
if (env) mrb_env_unshare(mrb, env);
}
void mrb_exc_set(mrb_state *mrb, mrb_value exc);
static void
ecall(mrb_state *mrb)
{
struct RProc *p;
struct mrb_context *c = mrb->c;
mrb_callinfo *ci = c->ci;
struct RObject *exc;
struct REnv *env;
ptrdiff_t cioff;
int ai = mrb_gc_arena_save(mrb);
int i = --c->eidx;
int nregs;
if (i<0) return;
if (ci - c->cibase > MRB_ECALL_DEPTH_MAX) {
mrb_exc_raise(mrb, mrb_obj_value(mrb->stack_err));
}
p = c->ensure[i];
if (!p) return;
mrb_assert(!MRB_PROC_CFUNC_P(p));
c->ensure[i] = NULL;
nregs = p->upper->body.irep->nregs;
if (ci->proc && !MRB_PROC_CFUNC_P(ci->proc) &&
ci->proc->body.irep->nregs > nregs) {
nregs = ci->proc->body.irep->nregs;
}
cioff = ci - c->cibase;
ci = cipush(mrb);
ci->stackent = mrb->c->stack;
ci->mid = ci[-1].mid;
ci->acc = CI_ACC_SKIP;
ci->argc = 0;
ci->proc = p;
ci->nregs = p->body.irep->nregs;
ci->target_class = MRB_PROC_TARGET_CLASS(p);
env = MRB_PROC_ENV(p);
mrb_assert(env);
c->stack += nregs;
exc = mrb->exc; mrb->exc = 0;
if (exc) {
mrb_gc_protect(mrb, mrb_obj_value(exc));
}
mrb_run(mrb, p, env->stack[0]);
mrb->c = c;
c->ci = c->cibase + cioff;
if (!mrb->exc) mrb->exc = exc;
mrb_gc_arena_restore(mrb, ai);
}
#ifndef MRB_FUNCALL_ARGC_MAX
#define MRB_FUNCALL_ARGC_MAX 16
#endif
MRB_API mrb_value
mrb_funcall(mrb_state *mrb, mrb_value self, const char *name, mrb_int argc, ...)
{
mrb_value argv[MRB_FUNCALL_ARGC_MAX];
va_list ap;
mrb_int i;
mrb_sym mid = mrb_intern_cstr(mrb, name);
if (argc > MRB_FUNCALL_ARGC_MAX) {
mrb_raise(mrb, E_ARGUMENT_ERROR, "Too long arguments. (limit=" MRB_STRINGIZE(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_API mrb_value
mrb_funcall_with_block(mrb_state *mrb, mrb_value self, mrb_sym mid, mrb_int argc, const mrb_value *argv, mrb_value blk)
{
mrb_value val;
if (!mrb->jmp) {
struct mrb_jmpbuf c_jmp;
ptrdiff_t nth_ci = mrb->c->ci - mrb->c->cibase;
MRB_TRY(&c_jmp) {
mrb->jmp = &c_jmp;
/* recursive call */
val = mrb_funcall_with_block(mrb, self, mid, argc, argv, blk);
mrb->jmp = 0;
}
MRB_CATCH(&c_jmp) { /* error */
while (nth_ci < (mrb->c->ci - mrb->c->cibase)) {
mrb->c->stack = mrb->c->ci->stackent;
cipop(mrb);
}
mrb->jmp = 0;
val = mrb_obj_value(mrb->exc);
}
MRB_END_EXC(&c_jmp);
mrb->jmp = 0;
}
else {
mrb_method_t m;
struct RClass *c;
mrb_callinfo *ci;
int n;
ptrdiff_t voff = -1;
if (!mrb->c->stack) {
stack_init(mrb);
}
n = mrb->c->ci->nregs;
if (argc < 0) {
mrb_raisef(mrb, E_ARGUMENT_ERROR, "negative argc for funcall (%S)", mrb_fixnum_value(argc));
}
c = mrb_class(mrb, self);
m = mrb_method_search_vm(mrb, &c, mid);
if (MRB_METHOD_UNDEF_P(m)) {
mrb_sym missing = mrb_intern_lit(mrb, "method_missing");
mrb_value args = mrb_ary_new_from_values(mrb, argc, argv);
m = mrb_method_search_vm(mrb, &c, missing);
if (MRB_METHOD_UNDEF_P(m)) {
mrb_method_missing(mrb, mid, self, args);
}
mrb_ary_unshift(mrb, args, mrb_symbol_value(mid));
stack_extend(mrb, n+2);
mrb->c->stack[n+1] = args;
argc = -1;
}
if (mrb->c->ci - mrb->c->cibase > MRB_FUNCALL_DEPTH_MAX) {
mrb_exc_raise(mrb, mrb_obj_value(mrb->stack_err));
}
ci = cipush(mrb);
ci->mid = mid;
ci->stackent = mrb->c->stack;
ci->argc = (int)argc;
ci->target_class = c;
mrb->c->stack = mrb->c->stack + n;
if (mrb->c->stbase <= argv && argv < mrb->c->stend) {
voff = argv - mrb->c->stbase;
}
if (MRB_METHOD_CFUNC_P(m)) {
ci->nregs = (int)(argc + 2);
stack_extend(mrb, ci->nregs);
}
else if (argc >= CALL_MAXARGS) {
mrb_value args = mrb_ary_new_from_values(mrb, argc, argv);
stack_extend(mrb, ci->nregs+2);
mrb->c->stack[1] = args;
ci->argc = -1;
argc = 1;
}
else {
struct RProc *p = MRB_METHOD_PROC(m);
ci->proc = p;
if (argc < 0) argc = 1;
ci->nregs = (int)(p->body.irep->nregs + argc);
stack_extend(mrb, ci->nregs);
}
if (voff >= 0) {
argv = mrb->c->stbase + voff;
}
mrb->c->stack[0] = self;
if (ci->argc > 0) {
stack_copy(mrb->c->stack+1, argv, argc);
}
mrb->c->stack[argc+1] = blk;
if (MRB_METHOD_CFUNC_P(m)) {
int ai = mrb_gc_arena_save(mrb);
ci->acc = CI_ACC_DIRECT;
if (MRB_METHOD_PROC_P(m)) {
ci->proc = MRB_METHOD_PROC(m);
}
val = MRB_METHOD_CFUNC(m)(mrb, self);
mrb->c->stack = mrb->c->ci->stackent;
cipop(mrb);
mrb_gc_arena_restore(mrb, ai);
}
else {
ci->acc = CI_ACC_SKIP;
val = mrb_run(mrb, MRB_METHOD_PROC(m), self);
}
}
mrb_gc_protect(mrb, val);
return val;
}
MRB_API mrb_value
mrb_funcall_argv(mrb_state *mrb, mrb_value self, mrb_sym mid, mrb_int argc, const mrb_value *argv)
{
return mrb_funcall_with_block(mrb, self, mid, argc, argv, mrb_nil_value());
}
mrb_value
mrb_exec_irep(mrb_state *mrb, mrb_value self, struct RProc *p)
{
mrb_callinfo *ci = mrb->c->ci;
int keep;
mrb->c->stack[0] = self;
ci->proc = p;
if (MRB_PROC_CFUNC_P(p)) {
return MRB_PROC_CFUNC(p)(mrb, self);
}
ci->nregs = p->body.irep->nregs;
if (ci->argc < 0) keep = 3;
else keep = ci->argc + 1;
if (ci->nregs < keep) {
stack_extend(mrb, keep);
}
else {
stack_extend(mrb, ci->nregs);
stack_clear(mrb->c->stack+keep, ci->nregs-keep);
}
ci = cipush(mrb);
ci->nregs = 0;
ci->target_class = 0;
ci->pc = p->body.irep->iseq;
ci->stackent = mrb->c->stack;
ci->acc = 0;
return self;
}
/* 15.3.1.3.4 */
/* 15.3.1.3.44 */
/*
* call-seq:
* obj.send(symbol [, args...]) -> obj
* obj.__send__(symbol [, args...]) -> obj
*
* Invokes the method identified by _symbol_, passing it any
* arguments specified. You can use <code>__send__</code> if the name
* +send+ clashes with an existing method in _obj_.
*
* class Klass
* def hello(*args)
* "Hello " + args.join(' ')
* end
* end
* k = Klass.new
* k.send :hello, "gentle", "readers" #=> "Hello gentle readers"
*/
MRB_API mrb_value
mrb_f_send(mrb_state *mrb, mrb_value self)
{
mrb_sym name;
mrb_value block, *argv, *regs;
mrb_int argc, i, len;
mrb_method_t m;
struct RClass *c;
mrb_callinfo *ci;
mrb_get_args(mrb, "n*&", &name, &argv, &argc, &block);
ci = mrb->c->ci;
if (ci->acc < 0) {
funcall:
return mrb_funcall_with_block(mrb, self, name, argc, argv, block);
}
c = mrb_class(mrb, self);
m = mrb_method_search_vm(mrb, &c, name);
if (MRB_METHOD_UNDEF_P(m)) { /* call method_mising */
goto funcall;
}
ci->mid = name;
ci->target_class = c;
regs = mrb->c->stack+1;
/* remove first symbol from arguments */
if (ci->argc >= 0) {
for (i=0,len=ci->argc; i<len; i++) {
regs[i] = regs[i+1];
}
ci->argc--;
}
else { /* variable length arguments */
mrb_ary_shift(mrb, regs[0]);
}
if (MRB_METHOD_CFUNC_P(m)) {
if (MRB_METHOD_PROC_P(m)) {
ci->proc = MRB_METHOD_PROC(m);
}
return MRB_METHOD_CFUNC(m)(mrb, self);
}
return mrb_exec_irep(mrb, self, MRB_METHOD_PROC(m));
}
static mrb_value
eval_under(mrb_state *mrb, mrb_value self, mrb_value blk, struct RClass *c)
{
struct RProc *p;
mrb_callinfo *ci;
if (mrb_nil_p(blk)) {
mrb_raise(mrb, E_ARGUMENT_ERROR, "no block given");
}
ci = mrb->c->ci;
if (ci->acc == CI_ACC_DIRECT) {
ci->target_class = c;
return mrb_yield_cont(mrb, blk, self, 1, &self);
}
ci->target_class = c;
p = mrb_proc_ptr(blk);
ci->proc = p;
ci->argc = 1;
ci->mid = ci[-1].mid;
if (MRB_PROC_CFUNC_P(p)) {
stack_extend(mrb, 3);
mrb->c->stack[0] = self;
mrb->c->stack[1] = self;
mrb->c->stack[2] = mrb_nil_value();
return MRB_PROC_CFUNC(p)(mrb, self);
}
ci->nregs = p->body.irep->nregs;
stack_extend(mrb, (ci->nregs < 3) ? 3 : ci->nregs);
mrb->c->stack[0] = self;
mrb->c->stack[1] = self;
mrb->c->stack[2] = mrb_nil_value();
ci = cipush(mrb);
ci->nregs = 0;
ci->target_class = 0;
ci->pc = p->body.irep->iseq;
ci->stackent = mrb->c->stack;
ci->acc = 0;
return self;
}
/* 15.2.2.4.35 */
/*
* call-seq:
* mod.class_eval {| | block } -> obj
* mod.module_eval {| | block } -> obj
*
* Evaluates block in the context of _mod_. This can
* be used to add methods to a class. <code>module_eval</code> returns
* the result of evaluating its argument.
*/
mrb_value
mrb_mod_module_eval(mrb_state *mrb, mrb_value mod)
{
mrb_value a, b;
if (mrb_get_args(mrb, "|S&", &a, &b) == 1) {
mrb_raise(mrb, E_NOTIMP_ERROR, "module_eval/class_eval with string not implemented");
}
return eval_under(mrb, mod, b, mrb_class_ptr(mod));
}
/* 15.3.1.3.18 */
/*
* call-seq:
* obj.instance_eval {| | block } -> obj
*
* Evaluates the given block,within the context of the receiver (_obj_).
* In order to set the context, the variable +self+ is set to _obj_ while
* the code is executing, giving the code access to _obj_'s
* instance variables. In the version of <code>instance_eval</code>
* that takes a +String+, the optional second and third
* parameters supply a filename and starting line number that are used
* when reporting compilation errors.
*
* class KlassWithSecret
* def initialize
* @secret = 99
* end
* end
* k = KlassWithSecret.new
* k.instance_eval { @secret } #=> 99
*/
mrb_value
mrb_obj_instance_eval(mrb_state *mrb, mrb_value self)
{
mrb_value a, b;
mrb_value cv;
struct RClass *c;
if (mrb_get_args(mrb, "|S&", &a, &b) == 1) {
mrb_raise(mrb, E_NOTIMP_ERROR, "instance_eval with string not implemented");
}
switch (mrb_type(self)) {
case MRB_TT_SYMBOL:
case MRB_TT_FIXNUM:
#ifndef MRB_WITHOUT_FLOAT
case MRB_TT_FLOAT:
#endif
c = 0;
break;
default:
cv = mrb_singleton_class(mrb, self);
c = mrb_class_ptr(cv);
break;
}
return eval_under(mrb, self, b, c);
}
MRB_API mrb_value
mrb_yield_with_class(mrb_state *mrb, mrb_value b, mrb_int argc, const mrb_value *argv, mrb_value self, struct RClass *c)
{
struct RProc *p;
mrb_sym mid = mrb->c->ci->mid;
mrb_callinfo *ci;
int n = mrb->c->ci->nregs;
mrb_value val;
if (mrb_nil_p(b)) {
mrb_raise(mrb, E_ARGUMENT_ERROR, "no block given");
}
if (mrb->c->ci - mrb->c->cibase > MRB_FUNCALL_DEPTH_MAX) {
mrb_exc_raise(mrb, mrb_obj_value(mrb->stack_err));
}
p = mrb_proc_ptr(b);
ci = cipush(mrb);
ci->mid = mid;
ci->proc = p;
ci->stackent = mrb->c->stack;
ci->argc = (int)argc;
ci->target_class = c;
ci->acc = CI_ACC_SKIP;
mrb->c->stack = mrb->c->stack + n;
ci->nregs = MRB_PROC_CFUNC_P(p) ? (int)(argc+2) : p->body.irep->nregs;
stack_extend(mrb, ci->nregs);
mrb->c->stack[0] = self;
if (argc > 0) {
stack_copy(mrb->c->stack+1, argv, argc);
}
mrb->c->stack[argc+1] = mrb_nil_value();
if (MRB_PROC_CFUNC_P(p)) {
val = MRB_PROC_CFUNC(p)(mrb, self);
mrb->c->stack = mrb->c->ci->stackent;
cipop(mrb);
}
else {
val = mrb_run(mrb, p, self);
}
return val;
}
MRB_API mrb_value
mrb_yield_argv(mrb_state *mrb, mrb_value b, mrb_int argc, const mrb_value *argv)
{
struct RProc *p = mrb_proc_ptr(b);
return mrb_yield_with_class(mrb, b, argc, argv, MRB_PROC_ENV(p)->stack[0], MRB_PROC_TARGET_CLASS(p));
}
MRB_API mrb_value
mrb_yield(mrb_state *mrb, mrb_value b, mrb_value arg)
{
struct RProc *p = mrb_proc_ptr(b);
return mrb_yield_with_class(mrb, b, 1, &arg, MRB_PROC_ENV(p)->stack[0], MRB_PROC_TARGET_CLASS(p));
}
mrb_value
mrb_yield_cont(mrb_state *mrb, mrb_value b, mrb_value self, mrb_int argc, const mrb_value *argv)
{
struct RProc *p;
mrb_callinfo *ci;
if (mrb_nil_p(b)) {
mrb_raise(mrb, E_ARGUMENT_ERROR, "no block given");
}
if (mrb_type(b) != MRB_TT_PROC) {
mrb_raise(mrb, E_TYPE_ERROR, "not a block");
}
p = mrb_proc_ptr(b);
ci = mrb->c->ci;
stack_extend(mrb, 3);
mrb->c->stack[1] = mrb_ary_new_from_values(mrb, argc, argv);
mrb->c->stack[2] = mrb_nil_value();
ci->argc = -1;
return mrb_exec_irep(mrb, self, p);
}
mrb_value
mrb_mod_s_nesting(mrb_state *mrb, mrb_value mod)
{
struct RProc *proc;
mrb_value ary;
struct RClass *c = NULL;
mrb_get_args(mrb, "");
ary = mrb_ary_new(mrb);
proc = mrb->c->ci[-1].proc; /* callee proc */
mrb_assert(!MRB_PROC_CFUNC_P(proc));
while (proc) {
if (MRB_PROC_SCOPE_P(proc)) {
struct RClass *c2 = MRB_PROC_TARGET_CLASS(proc);
if (c2 != c) {
c = c2;
mrb_ary_push(mrb, ary, mrb_obj_value(c));
}
}
proc = proc->upper;
}
return ary;
}
static struct RBreak*
break_new(mrb_state *mrb, struct RProc *p, mrb_value val)
{
struct RBreak *brk;
brk = (struct RBreak*)mrb_obj_alloc(mrb, MRB_TT_BREAK, NULL);
brk->proc = p;
brk->val = val;
return brk;
}
typedef enum {
LOCALJUMP_ERROR_RETURN = 0,
LOCALJUMP_ERROR_BREAK = 1,
LOCALJUMP_ERROR_YIELD = 2
} localjump_error_kind;
static void
localjump_error(mrb_state *mrb, localjump_error_kind kind)
{
char kind_str[3][7] = { "return", "break", "yield" };
char kind_str_len[] = { 6, 5, 5 };
static const char lead[] = "unexpected ";
mrb_value msg;
mrb_value exc;
msg = mrb_str_new_capa(mrb, sizeof(lead) + 7);
mrb_str_cat(mrb, msg, lead, sizeof(lead) - 1);
mrb_str_cat(mrb, msg, kind_str[kind], kind_str_len[kind]);
exc = mrb_exc_new_str(mrb, E_LOCALJUMP_ERROR, msg);
mrb_exc_set(mrb, exc);
}
static void
argnum_error(mrb_state *mrb, mrb_int num)
{
mrb_value exc;
mrb_value str;
mrb_int argc = mrb->c->ci->argc;
if (argc < 0) {
mrb_value args = mrb->c->stack[1];
if (mrb_array_p(args)) {
argc = RARRAY_LEN(args);
}
}
if (mrb->c->ci->mid) {
str = mrb_format(mrb, "'%S': wrong number of arguments (%S for %S)",
mrb_sym2str(mrb, mrb->c->ci->mid),
mrb_fixnum_value(argc), mrb_fixnum_value(num));
}
else {
str = mrb_format(mrb, "wrong number of arguments (%S for %S)",
mrb_fixnum_value(argc), mrb_fixnum_value(num));
}
exc = mrb_exc_new_str(mrb, E_ARGUMENT_ERROR, str);
mrb_exc_set(mrb, exc);
}
#define ERR_PC_SET(mrb, pc) mrb->c->ci->err = pc;
#define ERR_PC_CLR(mrb) mrb->c->ci->err = 0;
#ifdef MRB_ENABLE_DEBUG_HOOK
#define CODE_FETCH_HOOK(mrb, irep, pc, regs) if ((mrb)->code_fetch_hook) (mrb)->code_fetch_hook((mrb), (irep), (pc), (regs));
#else
#define CODE_FETCH_HOOK(mrb, irep, pc, regs)
#endif
#ifdef MRB_BYTECODE_DECODE_OPTION
#define BYTECODE_DECODER(x) ((mrb)->bytecode_decoder)?(mrb)->bytecode_decoder((mrb), (x)):(x)
#else
#define BYTECODE_DECODER(x) (x)
#endif
#if defined __GNUC__ || defined __clang__ || defined __INTEL_COMPILER
#define DIRECT_THREADED
#endif
#ifndef DIRECT_THREADED
#define INIT_DISPATCH for (;;) { i = BYTECODE_DECODER(*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=BYTECODE_DECODER(*++pc); CODE_FETCH_HOOK(mrb, irep, pc, regs); goto *optable[GET_OPCODE(i)]
#define JUMP i=BYTECODE_DECODER(*pc); CODE_FETCH_HOOK(mrb, irep, pc, regs); goto *optable[GET_OPCODE(i)]
#define END_DISPATCH
#endif
MRB_API mrb_value
mrb_vm_run(mrb_state *mrb, struct RProc *proc, mrb_value self, unsigned int stack_keep)
{
mrb_irep *irep = proc->body.irep;
mrb_value result;
struct mrb_context *c = mrb->c;
ptrdiff_t cioff = c->ci - c->cibase;
unsigned int nregs = irep->nregs;
if (!c->stack) {
stack_init(mrb);
}
if (stack_keep > nregs)
nregs = stack_keep;
stack_extend(mrb, nregs);
stack_clear(c->stack + stack_keep, nregs - stack_keep);
c->stack[0] = self;
result = mrb_vm_exec(mrb, proc, irep->iseq);
if (c->ci - c->cibase > cioff) {
c->ci = c->cibase + cioff;
}
if (mrb->c != c) {
if (mrb->c->fib) {
mrb_write_barrier(mrb, (struct RBasic*)mrb->c->fib);
}
mrb->c = c;
}
return result;
}
MRB_API mrb_value
mrb_vm_exec(mrb_state *mrb, struct RProc *proc, mrb_code *pc)
{
/* mrb_assert(mrb_proc_cfunc_p(proc)) */
mrb_irep *irep = proc->body.irep;
mrb_value *pool = irep->pool;
mrb_sym *syms = irep->syms;
mrb_code i;
int ai = mrb_gc_arena_save(mrb);
struct mrb_jmpbuf *prev_jmp = mrb->jmp;
struct mrb_jmpbuf 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
mrb_bool exc_catched = FALSE;
RETRY_TRY_BLOCK:
MRB_TRY(&c_jmp) {
if (exc_catched) {
exc_catched = FALSE;
if (mrb->exc && mrb->exc->tt == MRB_TT_BREAK)
goto L_BREAK;
goto L_RAISE;
}
mrb->jmp = &c_jmp;
mrb->c->ci->proc = proc;
mrb->c->ci->nregs = irep->nregs;
#define regs (mrb->c->stack)
INIT_DISPATCH {
CASE(OP_NOP) {
/* do nothing */
NEXT;
}
CASE(OP_MOVE) {
/* A B R(A) := R(B) */
int a = GETARG_A(i);
int b = GETARG_B(i);
regs[a] = regs[b];
NEXT;
}
CASE(OP_LOADL) {
/* A Bx R(A) := Pool(Bx) */
int a = GETARG_A(i);
int bx = GETARG_Bx(i);
#ifdef MRB_WORD_BOXING
mrb_value val = pool[bx];
#ifndef MRB_WITHOUT_FLOAT
if (mrb_float_p(val)) {
val = mrb_float_value(mrb, mrb_float(val));
}
#endif
regs[a] = val;
#else
regs[a] = pool[bx];
#endif
NEXT;
}
CASE(OP_LOADI) {
/* A sBx R(A) := sBx */
int a = GETARG_A(i);
mrb_int bx = GETARG_sBx(i);
SET_INT_VALUE(regs[a], bx);
NEXT;
}
CASE(OP_LOADSYM) {
/* A Bx R(A) := Syms(Bx) */
int a = GETARG_A(i);
int bx = GETARG_Bx(i);
SET_SYM_VALUE(regs[a], syms[bx]);
NEXT;
}
CASE(OP_LOADSELF) {
/* A R(A) := self */
int a = GETARG_A(i);
regs[a] = regs[0];
NEXT;
}
CASE(OP_LOADT) {
/* A R(A) := true */
int a = GETARG_A(i);
SET_TRUE_VALUE(regs[a]);
NEXT;
}
CASE(OP_LOADF) {
/* A R(A) := false */
int a = GETARG_A(i);
SET_FALSE_VALUE(regs[a]);
NEXT;
}
CASE(OP_GETGLOBAL) {
/* A Bx R(A) := getglobal(Syms(Bx)) */
int a = GETARG_A(i);
int bx = GETARG_Bx(i);
mrb_value val = mrb_gv_get(mrb, syms[bx]);
regs[a] = val;
NEXT;
}
CASE(OP_SETGLOBAL) {
/* A Bx setglobal(Syms(Bx), R(A)) */
int a = GETARG_A(i);
int bx = GETARG_Bx(i);
mrb_gv_set(mrb, syms[bx], regs[a]);
NEXT;
}
CASE(OP_GETSPECIAL) {
/* A Bx R(A) := Special[Bx] */
int a = GETARG_A(i);
int bx = GETARG_Bx(i);
mrb_value val = mrb_vm_special_get(mrb, bx);
regs[a] = val;
NEXT;
}
CASE(OP_SETSPECIAL) {
/* A Bx Special[Bx] := R(A) */
int a = GETARG_A(i);
int bx = GETARG_Bx(i);
mrb_vm_special_set(mrb, bx, regs[a]);
NEXT;
}
CASE(OP_GETIV) {
/* A Bx R(A) := ivget(Bx) */
int a = GETARG_A(i);
int bx = GETARG_Bx(i);
mrb_value val = mrb_vm_iv_get(mrb, syms[bx]);
regs[a] = val;
NEXT;
}
CASE(OP_SETIV) {
/* A Bx ivset(Syms(Bx),R(A)) */
int a = GETARG_A(i);
int bx = GETARG_Bx(i);
mrb_vm_iv_set(mrb, syms[bx], regs[a]);
NEXT;
}
CASE(OP_GETCV) {
/* A Bx R(A) := cvget(Syms(Bx)) */
int a = GETARG_A(i);
int bx = GETARG_Bx(i);
mrb_value val;
ERR_PC_SET(mrb, pc);
val = mrb_vm_cv_get(mrb, syms[bx]);
ERR_PC_CLR(mrb);
regs[a] = val;
NEXT;
}
CASE(OP_SETCV) {
/* A Bx cvset(Syms(Bx),R(A)) */
int a = GETARG_A(i);
int bx = GETARG_Bx(i);
mrb_vm_cv_set(mrb, syms[bx], regs[a]);
NEXT;
}
CASE(OP_GETCONST) {
/* A Bx R(A) := constget(Syms(Bx)) */
mrb_value val;
int a = GETARG_A(i);
int bx = GETARG_Bx(i);
mrb_sym sym = syms[bx];
ERR_PC_SET(mrb, pc);
val = mrb_vm_const_get(mrb, sym);
ERR_PC_CLR(mrb);
regs[a] = val;
NEXT;
}
CASE(OP_SETCONST) {
/* A Bx constset(Syms(Bx),R(A)) */
int a = GETARG_A(i);
int bx = GETARG_Bx(i);
mrb_vm_const_set(mrb, syms[bx], regs[a]);
NEXT;
}
CASE(OP_GETMCNST) {
/* A Bx R(A) := R(A)::Syms(Bx) */
mrb_value val;
int a = GETARG_A(i);
int bx = GETARG_Bx(i);
ERR_PC_SET(mrb, pc);
val = mrb_const_get(mrb, regs[a], syms[bx]);
ERR_PC_CLR(mrb);
regs[a] = val;
NEXT;
}
CASE(OP_SETMCNST) {
/* A Bx R(A+1)::Syms(Bx) := R(A) */
int a = GETARG_A(i);
int bx = GETARG_Bx(i);
mrb_const_set(mrb, regs[a+1], syms[bx], regs[a]);
NEXT;
}
CASE(OP_GETUPVAR) {
/* A B C R(A) := uvget(B,C) */
int a = GETARG_A(i);
int b = GETARG_B(i);
int c = GETARG_C(i);
mrb_value *regs_a = regs + a;
struct REnv *e = uvenv(mrb, c);
if (!e) {
*regs_a = mrb_nil_value();
}
else {
*regs_a = e->stack[b];
}
NEXT;
}
CASE(OP_SETUPVAR) {
/* A B C uvset(B,C,R(A)) */
int a = GETARG_A(i);
int b = GETARG_B(i);
int c = GETARG_C(i);
struct REnv *e = uvenv(mrb, c);
if (e) {
mrb_value *regs_a = regs + a;
if (b < MRB_ENV_STACK_LEN(e)) {
e->stack[b] = *regs_a;
mrb_write_barrier(mrb, (struct RBasic*)e);
}
}
NEXT;
}
CASE(OP_JMP) {
/* sBx pc+=sBx */
int sbx = GETARG_sBx(i);
pc += sbx;
JUMP;
}
CASE(OP_JMPIF) {
/* A sBx if R(A) pc+=sBx */
int a = GETARG_A(i);
int sbx = GETARG_sBx(i);
if (mrb_test(regs[a])) {
pc += sbx;
JUMP;
}
NEXT;
}
CASE(OP_JMPNOT) {
/* A sBx if !R(A) pc+=sBx */
int a = GETARG_A(i);
int sbx = GETARG_sBx(i);
if (!mrb_test(regs[a])) {
pc += sbx;
JUMP;
}
NEXT;
}
CASE(OP_ONERR) {
/* sBx pc+=sBx on exception */
int sbx = GETARG_sBx(i);
if (mrb->c->rsize <= mrb->c->ci->ridx) {
if (mrb->c->rsize == 0) mrb->c->rsize = RESCUE_STACK_INIT_SIZE;
else mrb->c->rsize *= 2;
mrb->c->rescue = (mrb_code **)mrb_realloc(mrb, mrb->c->rescue, sizeof(mrb_code*) * mrb->c->rsize);
}
mrb->c->rescue[mrb->c->ci->ridx++] = pc + sbx;
NEXT;
}
CASE(OP_RESCUE) {
/* A B R(A) := exc; clear(exc); R(B) := matched (bool) */
int a = GETARG_A(i);
int b = GETARG_B(i);
int c = GETARG_C(i);
mrb_value exc;
if (c == 0) {
exc = mrb_obj_value(mrb->exc);
mrb->exc = 0;
}
else { /* continued; exc taken from R(A) */
exc = regs[a];
}
if (b != 0) {
mrb_value e = regs[b];
struct RClass *ec;
switch (mrb_type(e)) {
case MRB_TT_CLASS:
case MRB_TT_MODULE:
break;
default:
{
mrb_value exc;
exc = mrb_exc_new_str_lit(mrb, E_TYPE_ERROR,
"class or module required for rescue clause");
mrb_exc_set(mrb, exc);
goto L_RAISE;
}
}
ec = mrb_class_ptr(e);
regs[b] = mrb_bool_value(mrb_obj_is_kind_of(mrb, exc, ec));
}
if (a != 0 && c == 0) {
regs[a] = exc;
}
NEXT;
}
CASE(OP_POPERR) {
/* A A.times{rescue_pop()} */
int a = GETARG_A(i);
mrb->c->ci->ridx -= a;
NEXT;
}
CASE(OP_RAISE) {
/* A raise(R(A)) */
int a = GETARG_A(i);
mrb_exc_set(mrb, regs[a]);
goto L_RAISE;
}
CASE(OP_EPUSH) {
/* Bx ensure_push(SEQ[Bx]) */
int bx = GETARG_Bx(i);
struct RProc *p;
p = mrb_closure_new(mrb, irep->reps[bx]);
/* push ensure_stack */
if (mrb->c->esize <= mrb->c->eidx+1) {
if (mrb->c->esize == 0) mrb->c->esize = ENSURE_STACK_INIT_SIZE;
else mrb->c->esize *= 2;
mrb->c->ensure = (struct RProc **)mrb_realloc(mrb, mrb->c->ensure, sizeof(struct RProc*) * mrb->c->esize);
}
mrb->c->ensure[mrb->c->eidx++] = p;
mrb->c->ensure[mrb->c->eidx] = NULL;
mrb_gc_arena_restore(mrb, ai);
NEXT;
}
CASE(OP_EPOP) {
/* A A.times{ensure_pop().call} */
int a = GETARG_A(i);
mrb_callinfo *ci = mrb->c->ci;
int n, epos = ci->epos;
mrb_value self = regs[0];
struct RClass *target_class = ci->target_class;
if (mrb->c->eidx <= epos) {
NEXT;
}
if (a > mrb->c->eidx - epos)
a = mrb->c->eidx - epos;
pc = pc + 1;
for (n=0; n<a; n++) {
proc = mrb->c->ensure[epos+n];
mrb->c->ensure[epos+n] = NULL;
irep = proc->body.irep;
ci = cipush(mrb);
ci->mid = ci[-1].mid;
ci->argc = 0;
ci->proc = proc;
ci->stackent = mrb->c->stack;
ci->nregs = irep->nregs;
ci->target_class = target_class;
ci->pc = pc;
ci->acc = ci[-1].nregs;
mrb->c->stack += ci->acc;
stack_extend(mrb, ci->nregs);
regs[0] = self;
pc = irep->iseq;
}
pool = irep->pool;
syms = irep->syms;
mrb->c->eidx = epos;
JUMP;
}
CASE(OP_LOADNIL) {
/* A R(A) := nil */
int a = GETARG_A(i);
SET_NIL_VALUE(regs[a]);
NEXT;
}
CASE(OP_SENDB) {
/* A B C R(A) := call(R(A),Syms(B),R(A+1),...,R(A+C),&R(A+C+1))*/
/* fall through */
};
L_SEND:
CASE(OP_SEND) {
/* A B C R(A) := call(R(A),Syms(B),R(A+1),...,R(A+C)) */
int a = GETARG_A(i);
int n = GETARG_C(i);
int argc = (n == CALL_MAXARGS) ? -1 : n;
int bidx = (argc < 0) ? a+2 : a+n+1;
mrb_method_t m;
struct RClass *c;
mrb_callinfo *ci = mrb->c->ci;
mrb_value recv, blk;
mrb_sym mid = syms[GETARG_B(i)];
mrb_assert(bidx < ci->nregs);
recv = regs[a];
if (GET_OPCODE(i) != OP_SENDB) {
SET_NIL_VALUE(regs[bidx]);
blk = regs[bidx];
}
else {
blk = regs[bidx];
if (!mrb_nil_p(blk) && mrb_type(blk) != MRB_TT_PROC) {
blk = mrb_convert_type(mrb, blk, MRB_TT_PROC, "Proc", "to_proc");
/* The stack might have been reallocated during mrb_convert_type(),
see #3622 */
regs[bidx] = blk;
}
}
c = mrb_class(mrb, recv);
m = mrb_method_search_vm(mrb, &c, mid);
if (MRB_METHOD_UNDEF_P(m)) {
mrb_sym missing = mrb_intern_lit(mrb, "method_missing");
m = mrb_method_search_vm(mrb, &c, missing);
if (MRB_METHOD_UNDEF_P(m) || (missing == mrb->c->ci->mid && mrb_obj_eq(mrb, regs[0], recv))) {
mrb_value args = (argc < 0) ? regs[a+1] : mrb_ary_new_from_values(mrb, n, regs+a+1);
ERR_PC_SET(mrb, pc);
mrb_method_missing(mrb, mid, recv, args);
}
if (argc >= 0) {
if (a+2 >= irep->nregs) {
stack_extend(mrb, a+3);
}
regs[a+1] = mrb_ary_new_from_values(mrb, n, regs+a+1);
regs[a+2] = blk;
argc = -1;
}
mrb_ary_unshift(mrb, regs[a+1], mrb_symbol_value(mid));
mid = missing;
}
/* push callinfo */
ci = cipush(mrb);
ci->mid = mid;
ci->stackent = mrb->c->stack;
ci->target_class = c;
ci->argc = argc;
ci->pc = pc + 1;
ci->acc = a;
/* prepare stack */
mrb->c->stack += a;
if (MRB_METHOD_CFUNC_P(m)) {
ci->nregs = (argc < 0) ? 3 : n+2;
if (MRB_METHOD_PROC_P(m)) {
struct RProc *p = MRB_METHOD_PROC(m);
ci->proc = p;
recv = p->body.func(mrb, recv);
}
else {
recv = MRB_METHOD_FUNC(m)(mrb, recv);
}
mrb_gc_arena_restore(mrb, ai);
mrb_gc_arena_shrink(mrb, ai);
if (mrb->exc) goto L_RAISE;
ci = mrb->c->ci;
if (GET_OPCODE(i) == OP_SENDB) {
if (mrb_type(blk) == MRB_TT_PROC) {
struct RProc *p = mrb_proc_ptr(blk);
if (p && !MRB_PROC_STRICT_P(p) && MRB_PROC_ENV(p) == ci[-1].env) {
p->flags |= MRB_PROC_ORPHAN;
}
}
}
if (!ci->target_class) { /* return from context modifying method (resume/yield) */
if (ci->acc == CI_ACC_RESUMED) {
mrb->jmp = prev_jmp;
return recv;
}
else {
mrb_assert(!MRB_PROC_CFUNC_P(ci[-1].proc));
proc = ci[-1].proc;
irep = proc->body.irep;
pool = irep->pool;
syms = irep->syms;
}
}
mrb->c->stack[0] = recv;
/* pop stackpos */
mrb->c->stack = ci->stackent;
pc = ci->pc;
cipop(mrb);
JUMP;
}
else {
/* setup environment for calling method */
proc = ci->proc = MRB_METHOD_PROC(m);
irep = proc->body.irep;
pool = irep->pool;
syms = irep->syms;
ci->nregs = irep->nregs;
stack_extend(mrb, (argc < 0 && ci->nregs < 3) ? 3 : ci->nregs);
pc = irep->iseq;
JUMP;
}
}
CASE(OP_FSEND) {
/* A B C R(A) := fcall(R(A),Syms(B),R(A+1),... ,R(A+C-1)) */
/* not implemented yet */
NEXT;
}
CASE(OP_CALL) {
/* A R(A) := self.call(frame.argc, frame.argv) */
mrb_callinfo *ci;
mrb_value recv = mrb->c->stack[0];
struct RProc *m = mrb_proc_ptr(recv);
/* replace callinfo */
ci = mrb->c->ci;
ci->target_class = MRB_PROC_TARGET_CLASS(m);
ci->proc = m;
if (MRB_PROC_ENV_P(m)) {
mrb_sym mid;
struct REnv *e = MRB_PROC_ENV(m);
mid = e->mid;
if (mid) ci->mid = mid;
if (!e->stack) {
e->stack = mrb->c->stack;
}
}
/* prepare stack */
if (MRB_PROC_CFUNC_P(m)) {
recv = MRB_PROC_CFUNC(m)(mrb, recv);
mrb_gc_arena_restore(mrb, ai);
mrb_gc_arena_shrink(mrb, ai);
if (mrb->exc) goto L_RAISE;
/* pop stackpos */
ci = mrb->c->ci;
mrb->c->stack = ci->stackent;
regs[ci->acc] = recv;
pc = ci->pc;
cipop(mrb);
irep = mrb->c->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->c->stack[0] = mrb_nil_value();
goto L_RETURN;
}
pool = irep->pool;
syms = irep->syms;
ci->nregs = irep->nregs;
stack_extend(mrb, ci->nregs);
if (ci->argc < 0) {
if (irep->nregs > 3) {
stack_clear(regs+3, irep->nregs-3);
}
}
else if (ci->argc+2 < irep->nregs) {
stack_clear(regs+ci->argc+2, irep->nregs-ci->argc-2);
}
if (MRB_PROC_ENV_P(m)) {
regs[0] = MRB_PROC_ENV(m)->stack[0];
}
pc = irep->iseq;
JUMP;
}
}
CASE(OP_SUPER) {
/* A C R(A) := super(R(A+1),... ,R(A+C+1)) */
int a = GETARG_A(i);
int n = GETARG_C(i);
int argc = (n == CALL_MAXARGS) ? -1 : n;
int bidx = (argc < 0) ? a+2 : a+n+1;
mrb_method_t m;
struct RClass *c;
mrb_callinfo *ci = mrb->c->ci;
mrb_value recv, blk;
mrb_sym mid = ci->mid;
struct RClass* target_class = MRB_PROC_TARGET_CLASS(ci->proc);
mrb_assert(bidx < ci->nregs);
if (mid == 0 || !target_class) {
mrb_value exc = mrb_exc_new_str_lit(mrb, E_NOMETHOD_ERROR, "super called outside of method");
mrb_exc_set(mrb, exc);
goto L_RAISE;
}
if (target_class->tt == MRB_TT_MODULE) {
target_class = ci->target_class;
if (target_class->tt != MRB_TT_ICLASS) {
mrb_value exc = mrb_exc_new_str_lit(mrb, E_RUNTIME_ERROR, "superclass info lost [mruby limitations]");
mrb_exc_set(mrb, exc);
goto L_RAISE;
}
}
recv = regs[0];
if (!mrb_obj_is_kind_of(mrb, recv, target_class)) {
mrb_value exc = mrb_exc_new_str_lit(mrb, E_TYPE_ERROR,
"self has wrong type to call super in this context");
mrb_exc_set(mrb, exc);
goto L_RAISE;
}
blk = regs[bidx];
if (!mrb_nil_p(blk) && mrb_type(blk) != MRB_TT_PROC) {
blk = mrb_convert_type(mrb, blk, MRB_TT_PROC, "Proc", "to_proc");
/* The stack or ci stack might have been reallocated during
mrb_convert_type(), see #3622 and #3784 */
regs[bidx] = blk;
ci = mrb->c->ci;
}
c = target_class->super;
m = mrb_method_search_vm(mrb, &c, mid);
if (MRB_METHOD_UNDEF_P(m)) {
mrb_sym missing = mrb_intern_lit(mrb, "method_missing");
if (mid != missing) {
c = mrb_class(mrb, recv);
}
m = mrb_method_search_vm(mrb, &c, missing);
if (MRB_METHOD_UNDEF_P(m)) {
mrb_value args = (argc < 0) ? regs[a+1] : mrb_ary_new_from_values(mrb, n, regs+a+1);
ERR_PC_SET(mrb, pc);
mrb_method_missing(mrb, mid, recv, args);
}
mid = missing;
if (argc >= 0) {
if (a+2 >= ci->nregs) {
stack_extend(mrb, a+3);
}
regs[a+1] = mrb_ary_new_from_values(mrb, n, regs+a+1);
regs[a+2] = blk;
argc = -1;
}
mrb_ary_unshift(mrb, regs[a+1], mrb_symbol_value(ci->mid));
}
/* push callinfo */
ci = cipush(mrb);
ci->mid = mid;
ci->stackent = mrb->c->stack;
ci->target_class = c;
ci->pc = pc + 1;
ci->argc = argc;
/* prepare stack */
mrb->c->stack += a;
mrb->c->stack[0] = recv;
if (MRB_METHOD_CFUNC_P(m)) {
mrb_value v;
ci->nregs = (argc < 0) ? 3 : n+2;
v = MRB_METHOD_CFUNC(m)(mrb, recv);
mrb_gc_arena_restore(mrb, ai);
if (mrb->exc) goto L_RAISE;
ci = mrb->c->ci;
if (!ci->target_class) { /* return from context modifying method (resume/yield) */
if (ci->acc == CI_ACC_RESUMED) {
mrb->jmp = prev_jmp;
return v;
}
else {
mrb_assert(!MRB_PROC_CFUNC_P(ci[-1].proc));
proc = ci[-1].proc;
irep = proc->body.irep;
pool = irep->pool;
syms = irep->syms;
}
}
mrb->c->stack[0] = v;
/* pop stackpos */
mrb->c->stack = ci->stackent;
pc = ci->pc;
cipop(mrb);
JUMP;
}
else {
/* fill callinfo */
ci->acc = a;
/* setup environment for calling method */
proc = ci->proc = MRB_METHOD_PROC(m);
irep = proc->body.irep;
pool = irep->pool;
syms = irep->syms;
ci->nregs = irep->nregs;
stack_extend(mrb, (argc < 0 && ci->nregs < 3) ? 3 : ci->nregs);
pc = irep->iseq;
JUMP;
}
}
CASE(OP_ARGARY) {
/* A Bx R(A) := argument array (16=6:1:5:4) */
int a = GETARG_A(i);
int bx = GETARG_Bx(i);
int m1 = (bx>>10)&0x3f;
int r = (bx>>9)&0x1;
int m2 = (bx>>4)&0x1f;
int lv = (bx>>0)&0xf;
mrb_value *stack;
if (mrb->c->ci->mid == 0 || mrb->c->ci->target_class == NULL) {
mrb_value exc;
L_NOSUPER:
exc = mrb_exc_new_str_lit(mrb, E_NOMETHOD_ERROR, "super called outside of method");
mrb_exc_set(mrb, exc);
goto L_RAISE;
}
if (lv == 0) stack = regs + 1;
else {
struct REnv *e = uvenv(mrb, lv-1);
if (!e) goto L_NOSUPER;
if (MRB_ENV_STACK_LEN(e) <= m1+r+m2+1)
goto L_NOSUPER;
stack = e->stack + 1;
}
if (r == 0) {
regs[a] = mrb_ary_new_from_values(mrb, m1+m2, stack);
}
else {
mrb_value *pp = NULL;
struct RArray *rest;
int len = 0;
if (mrb_array_p(stack[m1])) {
struct RArray *ary = mrb_ary_ptr(stack[m1]);
pp = ARY_PTR(ary);
len = (int)ARY_LEN(ary);
}
regs[a] = mrb_ary_new_capa(mrb, m1+len+m2);
rest = mrb_ary_ptr(regs[a]);
if (m1 > 0) {
stack_copy(ARY_PTR(rest), stack, m1);
}
if (len > 0) {
stack_copy(ARY_PTR(rest)+m1, pp, len);
}
if (m2 > 0) {
stack_copy(ARY_PTR(rest)+m1+len, stack+m1+1, m2);
}
ARY_SET_LEN(rest, m1+len+m2);
}
regs[a+1] = stack[m1+r+m2];
mrb_gc_arena_restore(mrb, ai);
NEXT;
}
CASE(OP_ENTER) {
/* Ax arg setup according to flags (23=5:5:1:5:5:1:1) */
/* number of optional arguments times OP_JMP should follow */
mrb_aspec ax = GETARG_Ax(i);
int m1 = MRB_ASPEC_REQ(ax);
int o = MRB_ASPEC_OPT(ax);
int r = MRB_ASPEC_REST(ax);
int m2 = MRB_ASPEC_POST(ax);
/* unused
int k = MRB_ASPEC_KEY(ax);
int kd = MRB_ASPEC_KDICT(ax);
int b = MRB_ASPEC_BLOCK(ax);
*/
int argc = mrb->c->ci->argc;
mrb_value *argv = regs+1;
mrb_value *argv0 = argv;
int len = m1 + o + r + m2;
mrb_value *blk = &argv[argc < 0 ? 1 : argc];
if (argc < 0) {
struct RArray *ary = mrb_ary_ptr(regs[1]);
argv = ARY_PTR(ary);
argc = (int)ARY_LEN(ary);
mrb_gc_protect(mrb, regs[1]);
}
if (mrb->c->ci->proc && MRB_PROC_STRICT_P(mrb->c->ci->proc)) {
if (argc >= 0) {
if (argc < m1 + m2 || (r == 0 && argc > len)) {
argnum_error(mrb, m1+m2);
goto L_RAISE;
}
}
}
else if (len > 1 && argc == 1 && mrb_array_p(argv[0])) {
mrb_gc_protect(mrb, argv[0]);
argc = (int)RARRAY_LEN(argv[0]);
argv = RARRAY_PTR(argv[0]);
}
if (argc < len) {
int mlen = m2;
if (argc < m1+m2) {
if (m1 < argc)
mlen = argc - m1;
else
mlen = 0;
}
regs[len+1] = *blk; /* move block */
SET_NIL_VALUE(regs[argc+1]);
if (argv0 != argv) {
value_move(®s[1], argv, argc-mlen); /* m1 + o */
}
if (argc < m1) {
stack_clear(®s[argc+1], m1-argc);
}
if (mlen) {
value_move(®s[len-m2+1], &argv[argc-mlen], mlen);
}
if (mlen < m2) {
stack_clear(®s[len-m2+mlen+1], m2-mlen);
}
if (r) {
regs[m1+o+1] = mrb_ary_new_capa(mrb, 0);
}
if (o == 0 || argc < m1+m2) pc++;
else
pc += argc - m1 - m2 + 1;
}
else {
int rnum = 0;
if (argv0 != argv) {
regs[len+1] = *blk; /* move block */
value_move(®s[1], argv, m1+o);
}
if (r) {
rnum = argc-m1-o-m2;
regs[m1+o+1] = mrb_ary_new_from_values(mrb, rnum, argv+m1+o);
}
if (m2) {
if (argc-m2 > m1) {
value_move(®s[m1+o+r+1], &argv[m1+o+rnum], m2);
}
}
if (argv0 == argv) {
regs[len+1] = *blk; /* move block */
}
pc += o + 1;
}
mrb->c->ci->argc = len;
/* clear local (but non-argument) variables */
if (irep->nlocals-len-2 > 0) {
stack_clear(®s[len+2], irep->nlocals-len-2);
}
JUMP;
}
CASE(OP_KARG) {
/* A B C R(A) := kdict[Syms(B)]; if C kdict.rm(Syms(B)) */
/* if C == 2; raise unless kdict.empty? */
/* OP_JMP should follow to skip init code */
NEXT;
}
CASE(OP_KDICT) {
/* A C R(A) := kdict */
NEXT;
}
L_RETURN:
i = MKOP_AB(OP_RETURN, GETARG_A(i), OP_R_NORMAL);
/* fall through */
CASE(OP_RETURN) {
/* A B return R(A) (B=normal,in-block return/break) */
mrb_callinfo *ci;
#define ecall_adjust() do {\
ptrdiff_t cioff = ci - mrb->c->cibase;\
ecall(mrb);\
ci = mrb->c->cibase + cioff;\
} while (0)
ci = mrb->c->ci;
if (ci->mid) {
mrb_value blk;
if (ci->argc < 0) {
blk = regs[2];
}
else {
blk = regs[ci->argc+1];
}
if (mrb_type(blk) == MRB_TT_PROC) {
struct RProc *p = mrb_proc_ptr(blk);
if (!MRB_PROC_STRICT_P(p) &&
ci > mrb->c->cibase && MRB_PROC_ENV(p) == ci[-1].env) {
p->flags |= MRB_PROC_ORPHAN;
}
}
}
if (mrb->exc) {
mrb_callinfo *ci0;
L_RAISE:
ci0 = ci = mrb->c->ci;
if (ci == mrb->c->cibase) {
if (ci->ridx == 0) goto L_FTOP;
goto L_RESCUE;
}
while (ci[0].ridx == ci[-1].ridx) {
cipop(mrb);
mrb->c->stack = ci->stackent;
if (ci->acc == CI_ACC_SKIP && prev_jmp) {
mrb->jmp = prev_jmp;
MRB_THROW(prev_jmp);
}
ci = mrb->c->ci;
if (ci == mrb->c->cibase) {
if (ci->ridx == 0) {
L_FTOP: /* fiber top */
if (mrb->c == mrb->root_c) {
mrb->c->stack = mrb->c->stbase;
goto L_STOP;
}
else {
struct mrb_context *c = mrb->c;
while (c->eidx > ci->epos) {
ecall_adjust();
}
if (c->fib) {
mrb_write_barrier(mrb, (struct RBasic*)c->fib);
}
mrb->c->status = MRB_FIBER_TERMINATED;
mrb->c = c->prev;
c->prev = NULL;
goto L_RAISE;
}
}
break;
}
/* call ensure only when we skip this callinfo */
if (ci[0].ridx == ci[-1].ridx) {
while (mrb->c->eidx > ci->epos) {
ecall_adjust();
}
}
}
L_RESCUE:
if (ci->ridx == 0) goto L_STOP;
proc = ci->proc;
irep = proc->body.irep;
pool = irep->pool;
syms = irep->syms;
if (ci < ci0) {
mrb->c->stack = ci[1].stackent;
}
stack_extend(mrb, irep->nregs);
pc = mrb->c->rescue[--ci->ridx];
}
else {
int acc;
mrb_value v;
struct RProc *dst;
ci = mrb->c->ci;
v = regs[GETARG_A(i)];
mrb_gc_protect(mrb, v);
switch (GETARG_B(i)) {
case OP_R_RETURN:
/* Fall through to OP_R_NORMAL otherwise */
if (ci->acc >=0 && MRB_PROC_ENV_P(proc) && !MRB_PROC_STRICT_P(proc)) {
mrb_callinfo *cibase = mrb->c->cibase;
dst = top_proc(mrb, proc);
if (MRB_PROC_ENV_P(dst)) {
struct REnv *e = MRB_PROC_ENV(dst);
if (!MRB_ENV_STACK_SHARED_P(e) || e->cxt != mrb->c) {
localjump_error(mrb, LOCALJUMP_ERROR_RETURN);
goto L_RAISE;
}
}
while (cibase <= ci && ci->proc != dst) {
if (ci->acc < 0) {
localjump_error(mrb, LOCALJUMP_ERROR_RETURN);
goto L_RAISE;
}
ci--;
}
if (ci <= cibase) {
localjump_error(mrb, LOCALJUMP_ERROR_RETURN);
goto L_RAISE;
}
break;
}
case OP_R_NORMAL:
NORMAL_RETURN:
if (ci == mrb->c->cibase) {
struct mrb_context *c;
if (!mrb->c->prev) { /* toplevel return */
localjump_error(mrb, LOCALJUMP_ERROR_RETURN);
goto L_RAISE;
}
if (mrb->c->prev->ci == mrb->c->prev->cibase) {
mrb_value exc = mrb_exc_new_str_lit(mrb, E_FIBER_ERROR, "double resume");
mrb_exc_set(mrb, exc);
goto L_RAISE;
}
while (mrb->c->eidx > 0) {
ecall(mrb);
}
/* automatic yield at the end */
c = mrb->c;
c->status = MRB_FIBER_TERMINATED;
mrb->c = c->prev;
c->prev = NULL;
mrb->c->status = MRB_FIBER_RUNNING;
ci = mrb->c->ci;
}
break;
case OP_R_BREAK:
if (MRB_PROC_STRICT_P(proc)) goto NORMAL_RETURN;
if (MRB_PROC_ORPHAN_P(proc)) {
mrb_value exc;
L_BREAK_ERROR:
exc = mrb_exc_new_str_lit(mrb, E_LOCALJUMP_ERROR,
"break from proc-closure");
mrb_exc_set(mrb, exc);
goto L_RAISE;
}
if (!MRB_PROC_ENV_P(proc) || !MRB_ENV_STACK_SHARED_P(MRB_PROC_ENV(proc))) {
goto L_BREAK_ERROR;
}
else {
struct REnv *e = MRB_PROC_ENV(proc);
if (e == mrb->c->cibase->env && proc != mrb->c->cibase->proc) {
goto L_BREAK_ERROR;
}
if (e->cxt != mrb->c) {
goto L_BREAK_ERROR;
}
}
while (mrb->c->eidx > mrb->c->ci->epos) {
ecall_adjust();
}
/* break from fiber block */
if (ci == mrb->c->cibase && ci->pc) {
struct mrb_context *c = mrb->c;
mrb->c = c->prev;
c->prev = NULL;
ci = mrb->c->ci;
}
if (ci->acc < 0) {
mrb_gc_arena_restore(mrb, ai);
mrb->c->vmexec = FALSE;
mrb->exc = (struct RObject*)break_new(mrb, proc, v);
mrb->jmp = prev_jmp;
MRB_THROW(prev_jmp);
}
if (FALSE) {
L_BREAK:
v = ((struct RBreak*)mrb->exc)->val;
proc = ((struct RBreak*)mrb->exc)->proc;
mrb->exc = NULL;
ci = mrb->c->ci;
}
mrb->c->stack = ci->stackent;
proc = proc->upper;
while (mrb->c->cibase < ci && ci[-1].proc != proc) {
if (ci[-1].acc == CI_ACC_SKIP) {
while (ci < mrb->c->ci) {
cipop(mrb);
}
goto L_BREAK_ERROR;
}
ci--;
}
if (ci == mrb->c->cibase) {
goto L_BREAK_ERROR;
}
break;
default:
/* cannot happen */
break;
}
while (ci < mrb->c->ci) {
cipop(mrb);
}
ci[0].ridx = ci[-1].ridx;
while (mrb->c->eidx > ci->epos) {
ecall_adjust();
}
if (mrb->c->vmexec && !ci->target_class) {
mrb_gc_arena_restore(mrb, ai);
mrb->c->vmexec = FALSE;
mrb->jmp = prev_jmp;
return v;
}
acc = ci->acc;
mrb->c->stack = ci->stackent;
cipop(mrb);
if (acc == CI_ACC_SKIP || acc == CI_ACC_DIRECT) {
mrb_gc_arena_restore(mrb, ai);
mrb->jmp = prev_jmp;
return v;
}
pc = ci->pc;
ci = mrb->c->ci;
DEBUG(fprintf(stderr, "from :%s\n", mrb_sym2name(mrb, ci->mid)));
proc = mrb->c->ci->proc;
irep = proc->body.irep;
pool = irep->pool;
syms = irep->syms;
regs[acc] = v;
mrb_gc_arena_restore(mrb, ai);
}
JUMP;
}
CASE(OP_TAILCALL) {
/* A B C return call(R(A),Syms(B),R(A+1),... ,R(A+C+1)) */
int a = GETARG_A(i);
int b = GETARG_B(i);
int n = GETARG_C(i);
mrb_method_t m;
struct RClass *c;
mrb_callinfo *ci;
mrb_value recv;
mrb_sym mid = syms[b];
recv = regs[a];
c = mrb_class(mrb, recv);
m = mrb_method_search_vm(mrb, &c, mid);
if (MRB_METHOD_UNDEF_P(m)) {
mrb_value sym = mrb_symbol_value(mid);
mrb_sym missing = mrb_intern_lit(mrb, "method_missing");
m = mrb_method_search_vm(mrb, &c, missing);
if (MRB_METHOD_UNDEF_P(m)) {
mrb_value args;
if (n == CALL_MAXARGS) {
args = regs[a+1];
}
else {
args = mrb_ary_new_from_values(mrb, n, regs+a+1);
}
ERR_PC_SET(mrb, pc);
mrb_method_missing(mrb, mid, recv, args);
}
mid = missing;
if (n == CALL_MAXARGS) {
mrb_ary_unshift(mrb, regs[a+1], sym);
}
else {
value_move(regs+a+2, regs+a+1, ++n);
regs[a+1] = sym;
}
}
/* replace callinfo */
ci = mrb->c->ci;
ci->mid = mid;
ci->target_class = c;
if (n == CALL_MAXARGS) {
ci->argc = -1;
}
else {
ci->argc = n;
}
/* move stack */
value_move(mrb->c->stack, ®s[a], ci->argc+1);
if (MRB_METHOD_CFUNC_P(m)) {
mrb_value v = MRB_METHOD_CFUNC(m)(mrb, recv);
mrb->c->stack[0] = v;
mrb_gc_arena_restore(mrb, ai);
goto L_RETURN;
}
else {
/* setup environment for calling method */
struct RProc *p = MRB_METHOD_PROC(m);
irep = p->body.irep;
pool = irep->pool;
syms = irep->syms;
if (ci->argc < 0) {
stack_extend(mrb, (irep->nregs < 3) ? 3 : irep->nregs);
}
else {
stack_extend(mrb, irep->nregs);
}
pc = irep->iseq;
}
JUMP;
}
CASE(OP_BLKPUSH) {
/* A Bx R(A) := block (16=6:1:5:4) */
int a = GETARG_A(i);
int bx = GETARG_Bx(i);
int m1 = (bx>>10)&0x3f;
int r = (bx>>9)&0x1;
int m2 = (bx>>4)&0x1f;
int lv = (bx>>0)&0xf;
mrb_value *stack;
if (lv == 0) stack = regs + 1;
else {
struct REnv *e = uvenv(mrb, lv-1);
if (!e || (!MRB_ENV_STACK_SHARED_P(e) && e->mid == 0) ||
MRB_ENV_STACK_LEN(e) <= m1+r+m2+1) {
localjump_error(mrb, LOCALJUMP_ERROR_YIELD);
goto L_RAISE;
}
stack = e->stack + 1;
}
if (mrb_nil_p(stack[m1+r+m2])) {
localjump_error(mrb, LOCALJUMP_ERROR_YIELD);
goto L_RAISE;
}
regs[a] = stack[m1+r+m2];
NEXT;
}
#define TYPES2(a,b) ((((uint16_t)(a))<<8)|(((uint16_t)(b))&0xff))
#define OP_MATH_BODY(op,v1,v2) do {\
v1(regs[a]) = v1(regs[a]) op v2(regs[a+1]);\
} while(0)
CASE(OP_ADD) {
/* A B C R(A) := R(A)+R(A+1) (Syms[B]=:+,C=1)*/
int a = GETARG_A(i);
/* need to check if op is overridden */
switch (TYPES2(mrb_type(regs[a]),mrb_type(regs[a+1]))) {
case TYPES2(MRB_TT_FIXNUM,MRB_TT_FIXNUM):
{
mrb_int x, y, z;
mrb_value *regs_a = regs + a;
x = mrb_fixnum(regs_a[0]);
y = mrb_fixnum(regs_a[1]);
if (mrb_int_add_overflow(x, y, &z)) {
#ifndef MRB_WITHOUT_FLOAT
SET_FLOAT_VALUE(mrb, regs_a[0], (mrb_float)x + (mrb_float)y);
break;
#endif
}
SET_INT_VALUE(regs[a], z);
}
break;
#ifndef MRB_WITHOUT_FLOAT
case TYPES2(MRB_TT_FIXNUM,MRB_TT_FLOAT):
{
mrb_int x = mrb_fixnum(regs[a]);
mrb_float y = mrb_float(regs[a+1]);
SET_FLOAT_VALUE(mrb, regs[a], (mrb_float)x + y);
}
break;
case TYPES2(MRB_TT_FLOAT,MRB_TT_FIXNUM):
#ifdef MRB_WORD_BOXING
{
mrb_float x = mrb_float(regs[a]);
mrb_int y = mrb_fixnum(regs[a+1]);
SET_FLOAT_VALUE(mrb, regs[a], x + y);
}
#else
OP_MATH_BODY(+,mrb_float,mrb_fixnum);
#endif
break;
case TYPES2(MRB_TT_FLOAT,MRB_TT_FLOAT):
#ifdef MRB_WORD_BOXING
{
mrb_float x = mrb_float(regs[a]);
mrb_float y = mrb_float(regs[a+1]);
SET_FLOAT_VALUE(mrb, regs[a], x + y);
}
#else
OP_MATH_BODY(+,mrb_float,mrb_float);
#endif
break;
#endif
case TYPES2(MRB_TT_STRING,MRB_TT_STRING):
regs[a] = mrb_str_plus(mrb, regs[a], regs[a+1]);
break;
default:
goto L_SEND;
}
mrb_gc_arena_restore(mrb, ai);
NEXT;
}
CASE(OP_SUB) {
/* A B C R(A) := R(A)-R(A+1) (Syms[B]=:-,C=1)*/
int a = GETARG_A(i);
/* need to check if op is overridden */
switch (TYPES2(mrb_type(regs[a]),mrb_type(regs[a+1]))) {
case TYPES2(MRB_TT_FIXNUM,MRB_TT_FIXNUM):
{
mrb_int x, y, z;
x = mrb_fixnum(regs[a]);
y = mrb_fixnum(regs[a+1]);
if (mrb_int_sub_overflow(x, y, &z)) {
#ifndef MRB_WITHOUT_FLOAT
SET_FLOAT_VALUE(mrb, regs[a], (mrb_float)x - (mrb_float)y);
break;
#endif
}
SET_INT_VALUE(regs[a], z);
}
break;
#ifndef MRB_WITHOUT_FLOAT
case TYPES2(MRB_TT_FIXNUM,MRB_TT_FLOAT):
{
mrb_int x = mrb_fixnum(regs[a]);
mrb_float y = mrb_float(regs[a+1]);
SET_FLOAT_VALUE(mrb, regs[a], (mrb_float)x - y);
}
break;
case TYPES2(MRB_TT_FLOAT,MRB_TT_FIXNUM):
#ifdef MRB_WORD_BOXING
{
mrb_float x = mrb_float(regs[a]);
mrb_int y = mrb_fixnum(regs[a+1]);
SET_FLOAT_VALUE(mrb, regs[a], x - y);
}
#else
OP_MATH_BODY(-,mrb_float,mrb_fixnum);
#endif
break;
case TYPES2(MRB_TT_FLOAT,MRB_TT_FLOAT):
#ifdef MRB_WORD_BOXING
{
mrb_float x = mrb_float(regs[a]);
mrb_float y = mrb_float(regs[a+1]);
SET_FLOAT_VALUE(mrb, regs[a], x - y);
}
#else
OP_MATH_BODY(-,mrb_float,mrb_float);
#endif
break;
#endif
default:
goto L_SEND;
}
NEXT;
}
CASE(OP_MUL) {
/* A B C R(A) := R(A)*R(A+1) (Syms[B]=:*,C=1)*/
int a = GETARG_A(i);
/* need to check if op is overridden */
switch (TYPES2(mrb_type(regs[a]),mrb_type(regs[a+1]))) {
case TYPES2(MRB_TT_FIXNUM,MRB_TT_FIXNUM):
{
mrb_int x, y, z;
x = mrb_fixnum(regs[a]);
y = mrb_fixnum(regs[a+1]);
if (mrb_int_mul_overflow(x, y, &z)) {
#ifndef MRB_WITHOUT_FLOAT
SET_FLOAT_VALUE(mrb, regs[a], (mrb_float)x * (mrb_float)y);
break;
#endif
}
SET_INT_VALUE(regs[a], z);
}
break;
#ifndef MRB_WITHOUT_FLOAT
case TYPES2(MRB_TT_FIXNUM,MRB_TT_FLOAT):
{
mrb_int x = mrb_fixnum(regs[a]);
mrb_float y = mrb_float(regs[a+1]);
SET_FLOAT_VALUE(mrb, regs[a], (mrb_float)x * y);
}
break;
case TYPES2(MRB_TT_FLOAT,MRB_TT_FIXNUM):
#ifdef MRB_WORD_BOXING
{
mrb_float x = mrb_float(regs[a]);
mrb_int y = mrb_fixnum(regs[a+1]);
SET_FLOAT_VALUE(mrb, regs[a], x * y);
}
#else
OP_MATH_BODY(*,mrb_float,mrb_fixnum);
#endif
break;
case TYPES2(MRB_TT_FLOAT,MRB_TT_FLOAT):
#ifdef MRB_WORD_BOXING
{
mrb_float x = mrb_float(regs[a]);
mrb_float y = mrb_float(regs[a+1]);
SET_FLOAT_VALUE(mrb, regs[a], x * y);
}
#else
OP_MATH_BODY(*,mrb_float,mrb_float);
#endif
break;
#endif
default:
goto L_SEND;
}
NEXT;
}
CASE(OP_DIV) {
/* A B C R(A) := R(A)/R(A+1) (Syms[B]=:/,C=1)*/
int a = GETARG_A(i);
#ifndef MRB_WITHOUT_FLOAT
double x, y, f;
#endif
/* need to check if op is overridden */
switch (TYPES2(mrb_type(regs[a]),mrb_type(regs[a+1]))) {
case TYPES2(MRB_TT_FIXNUM,MRB_TT_FIXNUM):
#ifdef MRB_WITHOUT_FLOAT
{
mrb_int x = mrb_fixnum(regs[a]);
mrb_int y = mrb_fixnum(regs[a+1]);
SET_INT_VALUE(regs[a], y ? x / y : 0);
}
break;
#else
x = (mrb_float)mrb_fixnum(regs[a]);
y = (mrb_float)mrb_fixnum(regs[a+1]);
break;
case TYPES2(MRB_TT_FIXNUM,MRB_TT_FLOAT):
x = (mrb_float)mrb_fixnum(regs[a]);
y = mrb_float(regs[a+1]);
break;
case TYPES2(MRB_TT_FLOAT,MRB_TT_FIXNUM):
x = mrb_float(regs[a]);
y = (mrb_float)mrb_fixnum(regs[a+1]);
break;
case TYPES2(MRB_TT_FLOAT,MRB_TT_FLOAT):
x = mrb_float(regs[a]);
y = mrb_float(regs[a+1]);
break;
#endif
default:
goto L_SEND;
}
#ifndef MRB_WITHOUT_FLOAT
if (y == 0) {
if (x > 0) f = INFINITY;
else if (x < 0) f = -INFINITY;
else /* if (x == 0) */ f = NAN;
}
else {
f = x / y;
}
SET_FLOAT_VALUE(mrb, regs[a], f);
#endif
NEXT;
}
CASE(OP_ADDI) {
/* A B C R(A) := R(A)+C (Syms[B]=:+)*/
int a = GETARG_A(i);
/* need to check if + is overridden */
switch (mrb_type(regs[a])) {
case MRB_TT_FIXNUM:
{
mrb_int x = mrb_fixnum(regs[a]);
mrb_int y = GETARG_C(i);
mrb_int z;
if (mrb_int_add_overflow(x, y, &z)) {
#ifndef MRB_WITHOUT_FLOAT
SET_FLOAT_VALUE(mrb, regs[a], (mrb_float)x + (mrb_float)y);
break;
#endif
}
SET_INT_VALUE(regs[a], z);
}
break;
#ifndef MRB_WITHOUT_FLOAT
case MRB_TT_FLOAT:
#ifdef MRB_WORD_BOXING
{
mrb_float x = mrb_float(regs[a]);
SET_FLOAT_VALUE(mrb, regs[a], x + GETARG_C(i));
}
#else
mrb_float(regs[a]) += GETARG_C(i);
#endif
break;
#endif
default:
SET_INT_VALUE(regs[a+1], GETARG_C(i));
i = MKOP_ABC(OP_SEND, a, GETARG_B(i), 1);
goto L_SEND;
}
NEXT;
}
CASE(OP_SUBI) {
/* A B C R(A) := R(A)-C (Syms[B]=:-)*/
int a = GETARG_A(i);
mrb_value *regs_a = regs + a;
/* need to check if + is overridden */
switch (mrb_type(regs_a[0])) {
case MRB_TT_FIXNUM:
{
mrb_int x = mrb_fixnum(regs_a[0]);
mrb_int y = GETARG_C(i);
mrb_int z;
if (mrb_int_sub_overflow(x, y, &z)) {
#ifndef MRB_WITHOUT_FLOAT
SET_FLOAT_VALUE(mrb, regs_a[0], (mrb_float)x - (mrb_float)y);
break;
#endif
}
SET_INT_VALUE(regs_a[0], z);
}
break;
#ifndef MRB_WITHOUT_FLOAT
case MRB_TT_FLOAT:
#ifdef MRB_WORD_BOXING
{
mrb_float x = mrb_float(regs[a]);
SET_FLOAT_VALUE(mrb, regs[a], x - GETARG_C(i));
}
#else
mrb_float(regs_a[0]) -= GETARG_C(i);
#endif
break;
#endif
default:
SET_INT_VALUE(regs_a[1], GETARG_C(i));
i = MKOP_ABC(OP_SEND, a, GETARG_B(i), 1);
goto L_SEND;
}
NEXT;
}
#define OP_CMP_BODY(op,v1,v2) (v1(regs[a]) op v2(regs[a+1]))
#ifdef MRB_WITHOUT_FLOAT
#define OP_CMP(op) do {\
int result;\
/* need to check if - is overridden */\
switch (TYPES2(mrb_type(regs[a]),mrb_type(regs[a+1]))) {\
case TYPES2(MRB_TT_FIXNUM,MRB_TT_FIXNUM):\
result = OP_CMP_BODY(op,mrb_fixnum,mrb_fixnum);\
break;\
default:\
goto L_SEND;\
}\
if (result) {\
SET_TRUE_VALUE(regs[a]);\
}\
else {\
SET_FALSE_VALUE(regs[a]);\
}\
} while(0)
#else
#define OP_CMP(op) do {\
int result;\
/* need to check if - is overridden */\
switch (TYPES2(mrb_type(regs[a]),mrb_type(regs[a+1]))) {\
case TYPES2(MRB_TT_FIXNUM,MRB_TT_FIXNUM):\
result = OP_CMP_BODY(op,mrb_fixnum,mrb_fixnum);\
break;\
case TYPES2(MRB_TT_FIXNUM,MRB_TT_FLOAT):\
result = OP_CMP_BODY(op,mrb_fixnum,mrb_float);\
break;\
case TYPES2(MRB_TT_FLOAT,MRB_TT_FIXNUM):\
result = OP_CMP_BODY(op,mrb_float,mrb_fixnum);\
break;\
case TYPES2(MRB_TT_FLOAT,MRB_TT_FLOAT):\
result = OP_CMP_BODY(op,mrb_float,mrb_float);\
break;\
default:\
goto L_SEND;\
}\
if (result) {\
SET_TRUE_VALUE(regs[a]);\
}\
else {\
SET_FALSE_VALUE(regs[a]);\
}\
} while(0)
#endif
CASE(OP_EQ) {
/* A B C R(A) := R(A)==R(A+1) (Syms[B]=:==,C=1)*/
int a = GETARG_A(i);
if (mrb_obj_eq(mrb, regs[a], regs[a+1])) {
SET_TRUE_VALUE(regs[a]);
}
else {
OP_CMP(==);
}
NEXT;
}
CASE(OP_LT) {
/* A B C R(A) := R(A)<R(A+1) (Syms[B]=:<,C=1)*/
int a = GETARG_A(i);
OP_CMP(<);
NEXT;
}
CASE(OP_LE) {
/* A B C R(A) := R(A)<=R(A+1) (Syms[B]=:<=,C=1)*/
int a = GETARG_A(i);
OP_CMP(<=);
NEXT;
}
CASE(OP_GT) {
/* A B C R(A) := R(A)>R(A+1) (Syms[B]=:>,C=1)*/
int a = GETARG_A(i);
OP_CMP(>);
NEXT;
}
CASE(OP_GE) {
/* A B C R(A) := R(A)>=R(A+1) (Syms[B]=:>=,C=1)*/
int a = GETARG_A(i);
OP_CMP(>=);
NEXT;
}
CASE(OP_ARRAY) {
/* A B C R(A) := ary_new(R(B),R(B+1)..R(B+C)) */
int a = GETARG_A(i);
int b = GETARG_B(i);
int c = GETARG_C(i);
mrb_value v = mrb_ary_new_from_values(mrb, c, ®s[b]);
regs[a] = v;
mrb_gc_arena_restore(mrb, ai);
NEXT;
}
CASE(OP_ARYCAT) {
/* A B mrb_ary_concat(R(A),R(B)) */
int a = GETARG_A(i);
int b = GETARG_B(i);
mrb_value splat = mrb_ary_splat(mrb, regs[b]);
mrb_ary_concat(mrb, regs[a], splat);
mrb_gc_arena_restore(mrb, ai);
NEXT;
}
CASE(OP_ARYPUSH) {
/* A B R(A).push(R(B)) */
int a = GETARG_A(i);
int b = GETARG_B(i);
mrb_ary_push(mrb, regs[a], regs[b]);
NEXT;
}
CASE(OP_AREF) {
/* A B C R(A) := R(B)[C] */
int a = GETARG_A(i);
int b = GETARG_B(i);
int c = GETARG_C(i);
mrb_value v = regs[b];
if (!mrb_array_p(v)) {
if (c == 0) {
regs[a] = v;
}
else {
SET_NIL_VALUE(regs[a]);
}
}
else {
v = mrb_ary_ref(mrb, v, c);
regs[a] = v;
}
NEXT;
}
CASE(OP_ASET) {
/* A B C R(B)[C] := R(A) */
int a = GETARG_A(i);
int b = GETARG_B(i);
int c = GETARG_C(i);
mrb_ary_set(mrb, regs[b], c, regs[a]);
NEXT;
}
CASE(OP_APOST) {
/* A B C *R(A),R(A+1)..R(A+C) := R(A) */
int a = GETARG_A(i);
mrb_value v = regs[a];
int pre = GETARG_B(i);
int post = GETARG_C(i);
struct RArray *ary;
int len, idx;
if (!mrb_array_p(v)) {
v = mrb_ary_new_from_values(mrb, 1, ®s[a]);
}
ary = mrb_ary_ptr(v);
len = (int)ARY_LEN(ary);
if (len > pre + post) {
v = mrb_ary_new_from_values(mrb, len - pre - post, ARY_PTR(ary)+pre);
regs[a++] = v;
while (post--) {
regs[a++] = ARY_PTR(ary)[len-post-1];
}
}
else {
v = mrb_ary_new_capa(mrb, 0);
regs[a++] = v;
for (idx=0; idx+pre<len; idx++) {
regs[a+idx] = ARY_PTR(ary)[pre+idx];
}
while (idx < post) {
SET_NIL_VALUE(regs[a+idx]);
idx++;
}
}
mrb_gc_arena_restore(mrb, ai);
NEXT;
}
CASE(OP_STRING) {
/* A Bx R(A) := str_new(Lit(Bx)) */
mrb_int a = GETARG_A(i);
mrb_int bx = GETARG_Bx(i);
mrb_value str = mrb_str_dup(mrb, pool[bx]);
regs[a] = str;
mrb_gc_arena_restore(mrb, ai);
NEXT;
}
CASE(OP_STRCAT) {
/* A B R(A).concat(R(B)) */
mrb_int a = GETARG_A(i);
mrb_int b = GETARG_B(i);
mrb_str_concat(mrb, regs[a], regs[b]);
NEXT;
}
CASE(OP_HASH) {
/* A B C R(A) := hash_new(R(B),R(B+1)..R(B+C)) */
int b = GETARG_B(i);
int c = GETARG_C(i);
int lim = b+c*2;
mrb_value hash = mrb_hash_new_capa(mrb, c);
while (b < lim) {
mrb_hash_set(mrb, hash, regs[b], regs[b+1]);
b+=2;
}
regs[GETARG_A(i)] = hash;
mrb_gc_arena_restore(mrb, ai);
NEXT;
}
CASE(OP_LAMBDA) {
/* A b c R(A) := lambda(SEQ[b],c) (b:c = 14:2) */
struct RProc *p;
int a = GETARG_A(i);
int b = GETARG_b(i);
int c = GETARG_c(i);
mrb_irep *nirep = irep->reps[b];
if (c & OP_L_CAPTURE) {
p = mrb_closure_new(mrb, nirep);
}
else {
p = mrb_proc_new(mrb, nirep);
p->flags |= MRB_PROC_SCOPE;
}
if (c & OP_L_STRICT) p->flags |= MRB_PROC_STRICT;
regs[a] = mrb_obj_value(p);
mrb_gc_arena_restore(mrb, ai);
NEXT;
}
CASE(OP_OCLASS) {
/* A R(A) := ::Object */
regs[GETARG_A(i)] = mrb_obj_value(mrb->object_class);
NEXT;
}
CASE(OP_CLASS) {
/* A B R(A) := newclass(R(A),Syms(B),R(A+1)) */
struct RClass *c = 0, *baseclass;
int a = GETARG_A(i);
mrb_value base, super;
mrb_sym id = syms[GETARG_B(i)];
base = regs[a];
super = regs[a+1];
if (mrb_nil_p(base)) {
baseclass = MRB_PROC_TARGET_CLASS(mrb->c->ci->proc);
base = mrb_obj_value(baseclass);
}
c = mrb_vm_define_class(mrb, base, super, id);
regs[a] = mrb_obj_value(c);
mrb_gc_arena_restore(mrb, ai);
NEXT;
}
CASE(OP_MODULE) {
/* A B R(A) := newmodule(R(A),Syms(B)) */
struct RClass *c = 0, *baseclass;
int a = GETARG_A(i);
mrb_value base;
mrb_sym id = syms[GETARG_B(i)];
base = regs[a];
if (mrb_nil_p(base)) {
baseclass = MRB_PROC_TARGET_CLASS(mrb->c->ci->proc);
base = mrb_obj_value(baseclass);
}
c = mrb_vm_define_module(mrb, base, id);
regs[a] = mrb_obj_value(c);
mrb_gc_arena_restore(mrb, ai);
NEXT;
}
CASE(OP_EXEC) {
/* A Bx R(A) := blockexec(R(A),SEQ[Bx]) */
int a = GETARG_A(i);
int bx = GETARG_Bx(i);
mrb_callinfo *ci;
mrb_value recv = regs[a];
struct RProc *p;
mrb_irep *nirep = irep->reps[bx];
/* prepare closure */
p = mrb_proc_new(mrb, nirep);
p->c = NULL;
mrb_field_write_barrier(mrb, (struct RBasic*)p, (struct RBasic*)proc);
MRB_PROC_SET_TARGET_CLASS(p, mrb_class_ptr(recv));
p->flags |= MRB_PROC_SCOPE;
/* prepare call stack */
ci = cipush(mrb);
ci->pc = pc + 1;
ci->acc = a;
ci->mid = 0;
ci->stackent = mrb->c->stack;
ci->argc = 0;
ci->target_class = mrb_class_ptr(recv);
/* prepare stack */
mrb->c->stack += a;
/* setup block to call */
ci->proc = p;
irep = p->body.irep;
pool = irep->pool;
syms = irep->syms;
ci->nregs = irep->nregs;
stack_extend(mrb, ci->nregs);
stack_clear(regs+1, ci->nregs-1);
pc = irep->iseq;
JUMP;
}
CASE(OP_METHOD) {
/* A B R(A).newmethod(Syms(B),R(A+1)) */
int a = GETARG_A(i);
struct RClass *c = mrb_class_ptr(regs[a]);
struct RProc *p = mrb_proc_ptr(regs[a+1]);
mrb_method_t m;
MRB_METHOD_FROM_PROC(m, p);
mrb_define_method_raw(mrb, c, syms[GETARG_B(i)], m);
mrb_gc_arena_restore(mrb, ai);
NEXT;
}
CASE(OP_SCLASS) {
/* A B R(A) := R(B).singleton_class */
int a = GETARG_A(i);
int b = GETARG_B(i);
regs[a] = mrb_singleton_class(mrb, regs[b]);
mrb_gc_arena_restore(mrb, ai);
NEXT;
}
CASE(OP_TCLASS) {
/* A R(A) := target_class */
if (!mrb->c->ci->target_class) {
mrb_value exc = mrb_exc_new_str_lit(mrb, E_TYPE_ERROR, "no target class or module");
mrb_exc_set(mrb, exc);
goto L_RAISE;
}
regs[GETARG_A(i)] = mrb_obj_value(mrb->c->ci->target_class);
NEXT;
}
CASE(OP_RANGE) {
/* A B C R(A) := range_new(R(B),R(B+1),C) */
int b = GETARG_B(i);
mrb_value val = mrb_range_new(mrb, regs[b], regs[b+1], GETARG_C(i));
regs[GETARG_A(i)] = val;
mrb_gc_arena_restore(mrb, ai);
NEXT;
}
CASE(OP_DEBUG) {
/* A B C debug print R(A),R(B),R(C) */
#ifdef MRB_ENABLE_DEBUG_HOOK
mrb->debug_op_hook(mrb, irep, pc, regs);
#else
#ifndef MRB_DISABLE_STDIO
printf("OP_DEBUG %d %d %d\n", GETARG_A(i), GETARG_B(i), GETARG_C(i));
#else
abort();
#endif
#endif
NEXT;
}
CASE(OP_STOP) {
/* stop VM */
L_STOP:
while (mrb->c->ci > mrb->c->cibase) {
cipop(mrb);
}
while (mrb->c->eidx > 0) {
ecall(mrb);
}
ERR_PC_CLR(mrb);
mrb->jmp = prev_jmp;
if (mrb->exc) {
return mrb_obj_value(mrb->exc);
}
return regs[irep->nlocals];
}
CASE(OP_ERR) {
/* Bx raise RuntimeError with message Lit(Bx) */
mrb_value msg = mrb_str_dup(mrb, pool[GETARG_Bx(i)]);
mrb_value exc;
if (GETARG_A(i) == 0) {
exc = mrb_exc_new_str(mrb, E_RUNTIME_ERROR, msg);
}
else {
exc = mrb_exc_new_str(mrb, E_LOCALJUMP_ERROR, msg);
}
ERR_PC_SET(mrb, pc);
mrb_exc_set(mrb, exc);
goto L_RAISE;
}
}
END_DISPATCH;
#undef regs
}
MRB_CATCH(&c_jmp) {
exc_catched = TRUE;
goto RETRY_TRY_BLOCK;
}
MRB_END_EXC(&c_jmp);
}
MRB_API mrb_value
mrb_run(mrb_state *mrb, struct RProc *proc, mrb_value self)
{
if (mrb->c->ci->argc < 0) {
return mrb_vm_run(mrb, proc, self, 3); /* receiver, args and block) */
}
else {
return mrb_vm_run(mrb, proc, self, mrb->c->ci->argc + 2); /* argc + 2 (receiver and block) */
}
}
MRB_API mrb_value
mrb_top_run(mrb_state *mrb, struct RProc *proc, mrb_value self, unsigned int stack_keep)
{
mrb_callinfo *ci;
mrb_value v;
if (!mrb->c->cibase) {
return mrb_vm_run(mrb, proc, self, stack_keep);
}
if (mrb->c->ci == mrb->c->cibase) {
return mrb_vm_run(mrb, proc, self, stack_keep);
}
ci = cipush(mrb);
ci->mid = 0;
ci->nregs = 1; /* protect the receiver */
ci->acc = CI_ACC_SKIP;
ci->target_class = mrb->object_class;
v = mrb_vm_run(mrb, proc, self, stack_keep);
cipop(mrb);
return v;
}
#if defined(MRB_ENABLE_CXX_EXCEPTION) && defined(__cplusplus)
# if !defined(MRB_ENABLE_CXX_ABI)
} /* end of extern "C" */
# endif
mrb_int mrb_jmpbuf::jmpbuf_id = 0;
# if !defined(MRB_ENABLE_CXX_ABI)
extern "C" {
# endif
#endif