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ruby--ruby/iseq.c

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/**********************************************************************
iseq.c -
$Author$
created at: 2006-07-11(Tue) 09:00:03 +0900
Copyright (C) 2006 Koichi Sasada
**********************************************************************/
#include "ruby/ruby.h"
/* #define RUBY_MARK_FREE_DEBUG 1 */
#include "gc.h"
#include "vm_core.h"
#include "iseq.h"
#include "insns.inc"
#include "insns_info.inc"
VALUE rb_cISeq;
#define hidden_obj_p(obj) (!SPECIAL_CONST_P(obj) && !RBASIC(obj)->klass)
static inline VALUE
obj_resurrect(VALUE obj)
{
if (hidden_obj_p(obj)) {
switch (BUILTIN_TYPE(obj)) {
case T_STRING:
obj = rb_str_resurrect(obj);
break;
case T_ARRAY:
obj = rb_ary_resurrect(obj);
break;
}
}
return obj;
}
static void
compile_data_free(struct iseq_compile_data *compile_data)
{
if (compile_data) {
struct iseq_compile_data_storage *cur, *next;
cur = compile_data->storage_head;
while (cur) {
next = cur->next;
ruby_xfree(cur);
cur = next;
}
ruby_xfree(compile_data);
}
}
static void
iseq_free(void *ptr)
{
rb_iseq_t *iseq;
RUBY_FREE_ENTER("iseq");
if (ptr) {
iseq = ptr;
if (!iseq->orig) {
/* It's possible that strings are freed */
if (0) {
RUBY_GC_INFO("%s @ %s\n", RSTRING_PTR(iseq->name),
RSTRING_PTR(iseq->filename));
}
if (iseq->iseq != iseq->iseq_encoded) {
RUBY_FREE_UNLESS_NULL(iseq->iseq_encoded);
}
RUBY_FREE_UNLESS_NULL(iseq->iseq);
RUBY_FREE_UNLESS_NULL(iseq->insn_info_table);
RUBY_FREE_UNLESS_NULL(iseq->local_table);
RUBY_FREE_UNLESS_NULL(iseq->ic_entries);
RUBY_FREE_UNLESS_NULL(iseq->catch_table);
RUBY_FREE_UNLESS_NULL(iseq->arg_opt_table);
compile_data_free(iseq->compile_data);
}
ruby_xfree(ptr);
}
RUBY_FREE_LEAVE("iseq");
}
static void
iseq_mark(void *ptr)
{
RUBY_MARK_ENTER("iseq");
if (ptr) {
rb_iseq_t *iseq = ptr;
RUBY_GC_INFO("%s @ %s\n", RSTRING_PTR(iseq->name), RSTRING_PTR(iseq->filename));
RUBY_MARK_UNLESS_NULL(iseq->mark_ary);
RUBY_MARK_UNLESS_NULL(iseq->name);
RUBY_MARK_UNLESS_NULL(iseq->filename);
RUBY_MARK_UNLESS_NULL(iseq->filepath);
RUBY_MARK_UNLESS_NULL((VALUE)iseq->cref_stack);
RUBY_MARK_UNLESS_NULL(iseq->klass);
RUBY_MARK_UNLESS_NULL(iseq->coverage);
#if 0
RUBY_MARK_UNLESS_NULL((VALUE)iseq->node);
RUBY_MARK_UNLESS_NULL(iseq->cached_special_block);
#endif
RUBY_MARK_UNLESS_NULL(iseq->orig);
if (iseq->compile_data != 0) {
struct iseq_compile_data *const compile_data = iseq->compile_data;
RUBY_MARK_UNLESS_NULL(compile_data->mark_ary);
RUBY_MARK_UNLESS_NULL(compile_data->err_info);
RUBY_MARK_UNLESS_NULL(compile_data->catch_table_ary);
}
}
RUBY_MARK_LEAVE("iseq");
}
static size_t
iseq_memsize(const void *ptr)
{
size_t size = sizeof(rb_iseq_t);
const rb_iseq_t *iseq;
if (ptr) {
iseq = ptr;
if (!iseq->orig) {
if (iseq->iseq != iseq->iseq_encoded) {
size += iseq->iseq_size * sizeof(VALUE);
}
size += iseq->iseq_size * sizeof(VALUE);
size += iseq->insn_info_size * sizeof(struct iseq_insn_info_entry);
size += iseq->local_table_size * sizeof(ID);
size += iseq->catch_table_size * sizeof(struct iseq_catch_table_entry);
size += iseq->arg_opts * sizeof(VALUE);
size += iseq->ic_size * sizeof(struct iseq_inline_cache_entry);
if (iseq->compile_data) {
struct iseq_compile_data_storage *cur;
cur = iseq->compile_data->storage_head;
while (cur) {
size += cur->size + sizeof(struct iseq_compile_data_storage);
cur = cur->next;
}
size += sizeof(struct iseq_compile_data);
}
}
}
return size;
}
static const rb_data_type_t iseq_data_type = {
"iseq",
iseq_mark,
iseq_free,
iseq_memsize,
};
static VALUE
iseq_alloc(VALUE klass)
{
rb_iseq_t *iseq;
return TypedData_Make_Struct(klass, rb_iseq_t, &iseq_data_type, iseq);
}
static void
set_relation(rb_iseq_t *iseq, const VALUE parent)
{
const VALUE type = iseq->type;
rb_thread_t *th = GET_THREAD();
/* set class nest stack */
if (type == ISEQ_TYPE_TOP) {
/* toplevel is private */
iseq->cref_stack = NEW_BLOCK(rb_cObject);
iseq->cref_stack->nd_file = 0;
iseq->cref_stack->nd_visi = NOEX_PRIVATE;
if (th->top_wrapper) {
NODE *cref = NEW_BLOCK(th->top_wrapper);
cref->nd_file = 0;
cref->nd_visi = NOEX_PRIVATE;
cref->nd_next = iseq->cref_stack;
iseq->cref_stack = cref;
}
}
else if (type == ISEQ_TYPE_METHOD || type == ISEQ_TYPE_CLASS) {
iseq->cref_stack = NEW_BLOCK(0); /* place holder */
iseq->cref_stack->nd_file = 0;
}
else if (RTEST(parent)) {
rb_iseq_t *piseq;
GetISeqPtr(parent, piseq);
iseq->cref_stack = piseq->cref_stack;
}
if (type == ISEQ_TYPE_TOP ||
type == ISEQ_TYPE_METHOD || type == ISEQ_TYPE_CLASS) {
iseq->local_iseq = iseq;
}
else if (RTEST(parent)) {
rb_iseq_t *piseq;
GetISeqPtr(parent, piseq);
iseq->local_iseq = piseq->local_iseq;
}
if (RTEST(parent)) {
rb_iseq_t *piseq;
GetISeqPtr(parent, piseq);
iseq->parent_iseq = piseq;
}
}
VALUE rb_realpath_internal(VALUE basedir, VALUE path, int strict);
static VALUE
prepare_iseq_build(rb_iseq_t *iseq,
VALUE name, VALUE filename, VALUE filepath, VALUE line_no,
VALUE parent, VALUE type, VALUE block_opt,
const rb_compile_option_t *option)
{
OBJ_FREEZE(name);
OBJ_FREEZE(filename);
iseq->name = name;
iseq->filename = filename;
iseq->filepath = filepath == Qnil ? Qnil : rb_realpath_internal(Qnil, filepath, 1);
iseq->line_no = line_no;
iseq->defined_method_id = 0;
iseq->mark_ary = rb_ary_tmp_new(3);
OBJ_UNTRUST(iseq->mark_ary);
RBASIC(iseq->mark_ary)->klass = 0;
iseq->type = type;
iseq->arg_rest = -1;
iseq->arg_block = -1;
iseq->klass = 0;
/*
* iseq->special_block_builder = GC_GUARDED_PTR_REF(block_opt);
* iseq->cached_special_block_builder = 0;
* iseq->cached_special_block = 0;
*/
iseq->compile_data = ALLOC(struct iseq_compile_data);
MEMZERO(iseq->compile_data, struct iseq_compile_data, 1);
iseq->compile_data->mark_ary = rb_ary_tmp_new(3);
iseq->compile_data->storage_head = iseq->compile_data->storage_current =
(struct iseq_compile_data_storage *)
ALLOC_N(char, INITIAL_ISEQ_COMPILE_DATA_STORAGE_BUFF_SIZE +
sizeof(struct iseq_compile_data_storage));
iseq->compile_data->catch_table_ary = rb_ary_new();
iseq->compile_data->storage_head->pos = 0;
iseq->compile_data->storage_head->next = 0;
iseq->compile_data->storage_head->size =
INITIAL_ISEQ_COMPILE_DATA_STORAGE_BUFF_SIZE;
iseq->compile_data->storage_head->buff =
(char *)(&iseq->compile_data->storage_head->buff + 1);
iseq->compile_data->option = option;
iseq->compile_data->last_coverable_line = -1;
set_relation(iseq, parent);
iseq->coverage = Qfalse;
if (!GET_THREAD()->parse_in_eval) {
extern VALUE rb_get_coverages(void);
VALUE coverages = rb_get_coverages();
if (RTEST(coverages)) {
iseq->coverage = rb_hash_lookup(coverages, filename);
if (NIL_P(iseq->coverage)) iseq->coverage = Qfalse;
}
}
return Qtrue;
}
static VALUE
cleanup_iseq_build(rb_iseq_t *iseq)
{
struct iseq_compile_data *data = iseq->compile_data;
VALUE err = data->err_info;
iseq->compile_data = 0;
compile_data_free(data);
if (RTEST(err)) {
rb_funcall2(err, rb_intern("set_backtrace"), 1, &iseq->filename);
rb_exc_raise(err);
}
return Qtrue;
}
static rb_compile_option_t COMPILE_OPTION_DEFAULT = {
OPT_INLINE_CONST_CACHE, /* int inline_const_cache; */
OPT_PEEPHOLE_OPTIMIZATION, /* int peephole_optimization; */
OPT_TAILCALL_OPTIMIZATION, /* int tailcall_optimization */
OPT_SPECIALISED_INSTRUCTION, /* int specialized_instruction; */
OPT_OPERANDS_UNIFICATION, /* int operands_unification; */
OPT_INSTRUCTIONS_UNIFICATION, /* int instructions_unification; */
OPT_STACK_CACHING, /* int stack_caching; */
OPT_TRACE_INSTRUCTION, /* int trace_instruction */
};
static const rb_compile_option_t COMPILE_OPTION_FALSE = {0};
static void
make_compile_option(rb_compile_option_t *option, VALUE opt)
{
if (opt == Qnil) {
*option = COMPILE_OPTION_DEFAULT;
}
else if (opt == Qfalse) {
*option = COMPILE_OPTION_FALSE;
}
else if (opt == Qtrue) {
memset(option, 1, sizeof(rb_compile_option_t));
}
else if (CLASS_OF(opt) == rb_cHash) {
*option = COMPILE_OPTION_DEFAULT;
#define SET_COMPILE_OPTION(o, h, mem) \
{ VALUE flag = rb_hash_aref(h, ID2SYM(rb_intern(#mem))); \
if (flag == Qtrue) { o->mem = 1; } \
else if (flag == Qfalse) { o->mem = 0; } \
}
#define SET_COMPILE_OPTION_NUM(o, h, mem) \
{ VALUE num = rb_hash_aref(opt, ID2SYM(rb_intern(#mem))); \
if (!NIL_P(num)) o->mem = NUM2INT(num); \
}
SET_COMPILE_OPTION(option, opt, inline_const_cache);
SET_COMPILE_OPTION(option, opt, peephole_optimization);
SET_COMPILE_OPTION(option, opt, tailcall_optimization);
SET_COMPILE_OPTION(option, opt, specialized_instruction);
SET_COMPILE_OPTION(option, opt, operands_unification);
SET_COMPILE_OPTION(option, opt, instructions_unification);
SET_COMPILE_OPTION(option, opt, stack_caching);
SET_COMPILE_OPTION(option, opt, trace_instruction);
SET_COMPILE_OPTION_NUM(option, opt, debug_level);
#undef SET_COMPILE_OPTION
#undef SET_COMPILE_OPTION_NUM
}
else {
rb_raise(rb_eTypeError, "Compile option must be Hash/true/false/nil");
}
}
static VALUE
make_compile_option_value(rb_compile_option_t *option)
{
VALUE opt = rb_hash_new();
#define SET_COMPILE_OPTION(o, h, mem) \
rb_hash_aset(h, ID2SYM(rb_intern(#mem)), o->mem ? Qtrue : Qfalse)
#define SET_COMPILE_OPTION_NUM(o, h, mem) \
rb_hash_aset(h, ID2SYM(rb_intern(#mem)), INT2NUM(o->mem))
{
SET_COMPILE_OPTION(option, opt, inline_const_cache);
SET_COMPILE_OPTION(option, opt, peephole_optimization);
SET_COMPILE_OPTION(option, opt, tailcall_optimization);
SET_COMPILE_OPTION(option, opt, specialized_instruction);
SET_COMPILE_OPTION(option, opt, operands_unification);
SET_COMPILE_OPTION(option, opt, instructions_unification);
SET_COMPILE_OPTION(option, opt, stack_caching);
SET_COMPILE_OPTION_NUM(option, opt, debug_level);
}
#undef SET_COMPILE_OPTION
#undef SET_COMPILE_OPTION_NUM
return opt;
}
VALUE
rb_iseq_new(NODE *node, VALUE name, VALUE filename, VALUE filepath,
VALUE parent, VALUE type)
{
return rb_iseq_new_with_opt(node, name, filename, filepath, INT2FIX(0), parent, type,
&COMPILE_OPTION_DEFAULT);
}
VALUE
rb_iseq_new_top(NODE *node, VALUE name, VALUE filename, VALUE filepath, VALUE parent)
{
return rb_iseq_new_with_opt(node, name, filename, filepath, INT2FIX(0), parent, ISEQ_TYPE_TOP,
&COMPILE_OPTION_DEFAULT);
}
VALUE
rb_iseq_new_main(NODE *node, VALUE filename, VALUE filepath)
{
rb_thread_t *th = GET_THREAD();
VALUE parent = th->base_block->iseq->self;
return rb_iseq_new_with_opt(node, rb_str_new2("<main>"), filename, filepath, INT2FIX(0),
parent, ISEQ_TYPE_MAIN, &COMPILE_OPTION_DEFAULT);
}
static VALUE
rb_iseq_new_with_bopt_and_opt(NODE *node, VALUE name, VALUE filename, VALUE filepath, VALUE line_no,
VALUE parent, VALUE type, VALUE bopt,
const rb_compile_option_t *option)
{
rb_iseq_t *iseq;
VALUE self = iseq_alloc(rb_cISeq);
GetISeqPtr(self, iseq);
iseq->self = self;
prepare_iseq_build(iseq, name, filename, filepath, line_no, parent, type, bopt, option);
rb_iseq_compile_node(self, node);
cleanup_iseq_build(iseq);
return self;
}
VALUE
rb_iseq_new_with_opt(NODE *node, VALUE name, VALUE filename, VALUE filepath, VALUE line_no,
VALUE parent, VALUE type,
const rb_compile_option_t *option)
{
/* TODO: argument check */
return rb_iseq_new_with_bopt_and_opt(node, name, filename, filepath, line_no, parent, type,
Qfalse, option);
}
VALUE
rb_iseq_new_with_bopt(NODE *node, VALUE name, VALUE filename, VALUE filepath, VALUE line_no,
VALUE parent, VALUE type, VALUE bopt)
{
/* TODO: argument check */
return rb_iseq_new_with_bopt_and_opt(node, name, filename, filepath, line_no, parent, type,
bopt, &COMPILE_OPTION_DEFAULT);
}
#define CHECK_ARRAY(v) rb_convert_type(v, T_ARRAY, "Array", "to_ary")
#define CHECK_STRING(v) rb_convert_type(v, T_STRING, "String", "to_str")
#define CHECK_SYMBOL(v) rb_convert_type(v, T_SYMBOL, "Symbol", "to_sym")
static inline VALUE CHECK_INTEGER(VALUE v) {NUM2LONG(v); return v;}
static VALUE
iseq_load(VALUE self, VALUE data, VALUE parent, VALUE opt)
{
VALUE iseqval = iseq_alloc(self);
VALUE magic, version1, version2, format_type, misc;
VALUE name, filename, filepath, line_no;
VALUE type, body, locals, args, exception;
VALUE iseq_type;
struct st_table *type_map = 0;
rb_iseq_t *iseq;
rb_compile_option_t option;
int i = 0;
/* [magic, major_version, minor_version, format_type, misc,
* name, filename, line_no,
* type, locals, args, exception_table, body]
*/
data = CHECK_ARRAY(data);
magic = CHECK_STRING(rb_ary_entry(data, i++));
version1 = CHECK_INTEGER(rb_ary_entry(data, i++));
version2 = CHECK_INTEGER(rb_ary_entry(data, i++));
format_type = CHECK_INTEGER(rb_ary_entry(data, i++));
misc = rb_ary_entry(data, i++); /* TODO */
name = CHECK_STRING(rb_ary_entry(data, i++));
filename = CHECK_STRING(rb_ary_entry(data, i++));
filepath = rb_ary_entry(data, i++);
filepath = NIL_P(filepath) ? Qnil : CHECK_STRING(filepath);
line_no = CHECK_INTEGER(rb_ary_entry(data, i++));
type = CHECK_SYMBOL(rb_ary_entry(data, i++));
locals = CHECK_ARRAY(rb_ary_entry(data, i++));
args = rb_ary_entry(data, i++);
if (FIXNUM_P(args) || (args = CHECK_ARRAY(args))) {
/* */
}
exception = CHECK_ARRAY(rb_ary_entry(data, i++));
body = CHECK_ARRAY(rb_ary_entry(data, i++));
GetISeqPtr(iseqval, iseq);
iseq->self = iseqval;
if (type_map == 0) {
type_map = st_init_numtable();
st_insert(type_map, ID2SYM(rb_intern("top")), ISEQ_TYPE_TOP);
st_insert(type_map, ID2SYM(rb_intern("method")), ISEQ_TYPE_METHOD);
st_insert(type_map, ID2SYM(rb_intern("block")), ISEQ_TYPE_BLOCK);
st_insert(type_map, ID2SYM(rb_intern("class")), ISEQ_TYPE_CLASS);
st_insert(type_map, ID2SYM(rb_intern("rescue")), ISEQ_TYPE_RESCUE);
st_insert(type_map, ID2SYM(rb_intern("ensure")), ISEQ_TYPE_ENSURE);
st_insert(type_map, ID2SYM(rb_intern("eval")), ISEQ_TYPE_EVAL);
st_insert(type_map, ID2SYM(rb_intern("main")), ISEQ_TYPE_MAIN);
st_insert(type_map, ID2SYM(rb_intern("defined_guard")), ISEQ_TYPE_DEFINED_GUARD);
}
if (st_lookup(type_map, type, &iseq_type) == 0) {
const char *typename = rb_id2name(type);
if (typename)
rb_raise(rb_eTypeError, "unsupport type: :%s", typename);
else
rb_raise(rb_eTypeError, "unsupport type: %p", (void *)type);
}
if (parent == Qnil) {
parent = 0;
}
make_compile_option(&option, opt);
prepare_iseq_build(iseq, name, filename, filepath, line_no,
parent, iseq_type, 0, &option);
rb_iseq_build_from_ary(iseq, locals, args, exception, body);
cleanup_iseq_build(iseq);
return iseqval;
}
static VALUE
iseq_s_load(int argc, VALUE *argv, VALUE self)
{
VALUE data, opt=Qnil;
rb_scan_args(argc, argv, "11", &data, &opt);
return iseq_load(self, data, 0, opt);
}
VALUE
rb_iseq_load(VALUE data, VALUE parent, VALUE opt)
{
return iseq_load(rb_cISeq, data, parent, opt);
}
static NODE *
parse_string(VALUE str, const char *file, int line)
{
VALUE parser = rb_parser_new();
NODE *node = rb_parser_compile_string(parser, file, str, line);
if (!node) {
rb_exc_raise(GET_THREAD()->errinfo); /* TODO: check err */
}
return node;
}
VALUE
rb_iseq_compile_with_option(VALUE src, VALUE file, VALUE filepath, VALUE line, VALUE opt)
{
rb_compile_option_t option;
const char *fn = StringValueCStr(file);
int ln = NUM2INT(line);
NODE *node = parse_string(StringValue(src), fn, ln);
rb_thread_t *th = GET_THREAD();
make_compile_option(&option, opt);
if (th->base_block && th->base_block->iseq) {
return rb_iseq_new_with_opt(node, th->base_block->iseq->name,
file, filepath, line, th->base_block->iseq->self,
ISEQ_TYPE_EVAL, &option);
}
else {
return rb_iseq_new_with_opt(node, rb_str_new2("<compiled>"), file, filepath, line, Qfalse,
ISEQ_TYPE_TOP, &option);
}
}
VALUE
rb_iseq_compile(VALUE src, VALUE file, VALUE line)
{
return rb_iseq_compile_with_option(src, file, Qnil, line, Qnil);
}
static VALUE
iseq_s_compile(int argc, VALUE *argv, VALUE self)
{
VALUE src, file = Qnil, path = Qnil, line = INT2FIX(1), opt = Qnil;
rb_secure(1);
rb_scan_args(argc, argv, "14", &src, &file, &path, &line, &opt);
if (NIL_P(file)) file = rb_str_new2("<compiled>");
if (NIL_P(line)) line = INT2FIX(1);
return rb_iseq_compile_with_option(src, file, path, line, opt);
}
static VALUE
iseq_s_compile_file(int argc, VALUE *argv, VALUE self)
{
VALUE file, line = INT2FIX(1), opt = Qnil;
VALUE parser;
VALUE f;
NODE *node;
const char *fname;
rb_compile_option_t option;
rb_secure(1);
rb_scan_args(argc, argv, "11", &file, &opt);
FilePathValue(file);
fname = StringValueCStr(file);
f = rb_file_open_str(file, "r");
parser = rb_parser_new();
node = rb_parser_compile_file(parser, fname, f, NUM2INT(line));
make_compile_option(&option, opt);
return rb_iseq_new_with_opt(node, rb_str_new2("<main>"), file, file, line, Qfalse,
ISEQ_TYPE_TOP, &option);
}
static VALUE
iseq_s_compile_option_set(VALUE self, VALUE opt)
{
rb_compile_option_t option;
rb_secure(1);
make_compile_option(&option, opt);
COMPILE_OPTION_DEFAULT = option;
return opt;
}
static VALUE
iseq_s_compile_option_get(VALUE self)
{
return make_compile_option_value(&COMPILE_OPTION_DEFAULT);
}
static rb_iseq_t *
iseq_check(VALUE val)
{
rb_iseq_t *iseq;
GetISeqPtr(val, iseq);
if (!iseq->name) {
rb_raise(rb_eTypeError, "uninitialized InstructionSequence");
}
return iseq;
}
static VALUE
iseq_eval(VALUE self)
{
rb_secure(1);
return rb_iseq_eval(self);
}
static VALUE
iseq_inspect(VALUE self)
{
rb_iseq_t *iseq;
GetISeqPtr(self, iseq);
if (!iseq->name) {
return rb_sprintf("#<%s: uninitialized>", rb_obj_classname(self));
}
return rb_sprintf("<%s:%s@%s>",
rb_obj_classname(self),
RSTRING_PTR(iseq->name), RSTRING_PTR(iseq->filename));
}
static
VALUE iseq_data_to_ary(rb_iseq_t *iseq);
static VALUE
iseq_to_a(VALUE self)
{
rb_iseq_t *iseq = iseq_check(self);
rb_secure(1);
return iseq_data_to_ary(iseq);
}
int
rb_iseq_first_lineno(rb_iseq_t *iseq)
{
return FIX2INT(iseq->line_no);
}
/* TODO: search algorithm is brute force.
this should be binary search or so. */
static struct iseq_insn_info_entry *
get_insn_info(const rb_iseq_t *iseq, const unsigned long pos)
{
unsigned long i, size = iseq->insn_info_size;
struct iseq_insn_info_entry *table = iseq->insn_info_table;
for (i = 0; i < size; i++) {
if (table[i].position == pos) {
return &table[i];
}
}
return 0;
}
static unsigned short
find_line_no(rb_iseq_t *iseq, unsigned long pos)
{
struct iseq_insn_info_entry *entry = get_insn_info(iseq, pos);
if (entry) {
return entry->line_no;
}
else {
return 0;
}
}
static unsigned short
find_prev_line_no(rb_iseq_t *iseqdat, unsigned long pos)
{
unsigned long i, size = iseqdat->insn_info_size;
struct iseq_insn_info_entry *iiary = iseqdat->insn_info_table;
for (i = 0; i < size; i++) {
if (iiary[i].position == pos) {
if (i > 0) {
return iiary[i - 1].line_no;
}
else {
return 0;
}
}
}
return 0;
}
static VALUE
insn_operand_intern(rb_iseq_t *iseq,
VALUE insn, int op_no, VALUE op,
int len, size_t pos, VALUE *pnop, VALUE child)
{
const char *types = insn_op_types(insn);
char type = types[op_no];
VALUE ret;
switch (type) {
case TS_OFFSET: /* LONG */
ret = rb_sprintf("%ld", pos + len + op);
break;
case TS_NUM: /* ULONG */
ret = rb_sprintf("%lu", op);
break;
case TS_LINDEX:
{
rb_iseq_t *ip = iseq->local_iseq;
int lidx = ip->local_size - (int)op;
const char *name = rb_id2name(ip->local_table[lidx]);
if (name) {
ret = rb_str_new2(name);
}
else {
ret = rb_str_new2("*");
}
break;
}
case TS_DINDEX:{
if (insn == BIN(getdynamic) || insn == BIN(setdynamic)) {
rb_iseq_t *ip = iseq;
VALUE level = *pnop, i;
const char *name;
for (i = 0; i < level; i++) {
ip = ip->parent_iseq;
}
name = rb_id2name(ip->local_table[ip->local_size - op]);
if (!name) {
name = "*";
}
ret = rb_str_new2(name);
}
else {
ret = rb_inspect(INT2FIX(op));
}
break;
}
case TS_ID: /* ID (symbol) */
op = ID2SYM(op);
case TS_VALUE: /* VALUE */
op = obj_resurrect(op);
ret = rb_inspect(op);
if (CLASS_OF(op) == rb_cISeq) {
rb_ary_push(child, op);
}
break;
case TS_ISEQ: /* iseq */
{
rb_iseq_t *iseq = (rb_iseq_t *)op;
if (iseq) {
ret = iseq->name;
if (child) {
rb_ary_push(child, iseq->self);
}
}
else {
ret = rb_str_new2("nil");
}
break;
}
case TS_GENTRY:
{
struct rb_global_entry *entry = (struct rb_global_entry *)op;
ret = rb_str_dup(rb_id2str(entry->id));
}
break;
case TS_IC:
ret = rb_sprintf("<ic:%"PRIdPTRDIFF">", (struct iseq_inline_cache_entry *)op - iseq->ic_entries);
break;
case TS_CDHASH:
ret = rb_str_new2("<cdhash>");
break;
case TS_FUNCPTR:
ret = rb_str_new2("<funcptr>");
break;
default:
rb_bug("rb_iseq_disasm: unknown operand type: %c", type);
}
return ret;
}
/**
* Disassemble a instruction
* Iseq -> Iseq inspect object
*/
int
rb_iseq_disasm_insn(VALUE ret, VALUE *iseq, size_t pos,
rb_iseq_t *iseqdat, VALUE child)
{
VALUE insn = iseq[pos];
int len = insn_len(insn);
int j;
const char *types = insn_op_types(insn);
VALUE str = rb_str_new(0, 0);
const char *insn_name_buff;
insn_name_buff = insn_name(insn);
if (1) {
rb_str_catf(str, "%04"PRIdSIZE" %-16s ", pos, insn_name_buff);
}
else {
rb_str_catf(str, "%04"PRIdSIZE" %-16.*s ", pos,
(int)strcspn(insn_name_buff, "_"), insn_name_buff);
}
for (j = 0; types[j]; j++) {
const char *types = insn_op_types(insn);
VALUE opstr = insn_operand_intern(iseqdat, insn, j, iseq[pos + j + 1],
len, pos, &iseq[pos + j + 2],
child);
rb_str_concat(str, opstr);
if (types[j + 1]) {
rb_str_cat2(str, ", ");
}
}
if (1) {
int line_no = find_line_no(iseqdat, pos);
int prev = find_prev_line_no(iseqdat, pos);
if (line_no && line_no != prev) {
long slen = RSTRING_LEN(str);
slen = (slen > 70) ? 0 : (70 - slen);
str = rb_str_catf(str, "%*s(%4d)", (int)slen, "", line_no);
}
}
else {
/* for debug */
struct iseq_insn_info_entry *entry = get_insn_info(iseqdat, pos);
long slen = RSTRING_LEN(str);
slen = (slen > 60) ? 0 : (60 - slen);
str = rb_str_catf(str, "%*s(line: %d, sp: %d)",
(int)slen, "", entry->line_no, entry->sp);
}
if (ret) {
rb_str_cat2(str, "\n");
rb_str_concat(ret, str);
}
else {
printf("%s\n", RSTRING_PTR(str));
}
return len;
}
static const char *
catch_type(int type)
{
switch (type) {
case CATCH_TYPE_RESCUE:
return "rescue";
case CATCH_TYPE_ENSURE:
return "ensure";
case CATCH_TYPE_RETRY:
return "retry";
case CATCH_TYPE_BREAK:
return "break";
case CATCH_TYPE_REDO:
return "redo";
case CATCH_TYPE_NEXT:
return "next";
default:
rb_bug("unknown catch type (%d)", type);
return 0;
}
}
VALUE
rb_iseq_disasm(VALUE self)
{
rb_iseq_t *iseqdat = iseq_check(self);
VALUE *iseq;
VALUE str = rb_str_new(0, 0);
VALUE child = rb_ary_new();
unsigned long size;
int i;
long l;
ID *tbl;
size_t n;
enum {header_minlen = 72};
rb_secure(1);
iseq = iseqdat->iseq;
size = iseqdat->iseq_size;
rb_str_cat2(str, "== disasm: ");
rb_str_concat(str, iseq_inspect(iseqdat->self));
if ((l = RSTRING_LEN(str)) < header_minlen) {
rb_str_resize(str, header_minlen);
memset(RSTRING_PTR(str) + l, '=', header_minlen - l);
}
rb_str_cat2(str, "\n");
/* show catch table information */
if (iseqdat->catch_table_size != 0) {
rb_str_cat2(str, "== catch table\n");
}
for (i = 0; i < iseqdat->catch_table_size; i++) {
struct iseq_catch_table_entry *entry = &iseqdat->catch_table[i];
rb_str_catf(str,
"| catch type: %-6s st: %04d ed: %04d sp: %04d cont: %04d\n",
catch_type((int)entry->type), (int)entry->start,
(int)entry->end, (int)entry->sp, (int)entry->cont);
if (entry->iseq) {
rb_str_concat(str, rb_iseq_disasm(entry->iseq));
}
}
if (iseqdat->catch_table_size != 0) {
rb_str_cat2(str, "|-------------------------------------"
"-----------------------------------\n");
}
/* show local table information */
tbl = iseqdat->local_table;
if (tbl) {
rb_str_catf(str,
"local table (size: %d, argc: %d "
"[opts: %d, rest: %d, post: %d, block: %d] s%d)\n",
iseqdat->local_size, iseqdat->argc,
iseqdat->arg_opts, iseqdat->arg_rest,
iseqdat->arg_post_len, iseqdat->arg_block,
iseqdat->arg_simple);
for (i = 0; i < iseqdat->local_table_size; i++) {
const char *name = rb_id2name(tbl[i]);
char info[0x100];
char argi[0x100] = "";
char opti[0x100] = "";
if (iseqdat->arg_opts) {
int argc = iseqdat->argc;
int opts = iseqdat->arg_opts;
if (i >= argc && i < argc + opts - 1) {
snprintf(opti, sizeof(opti), "Opt=%ld",
iseqdat->arg_opt_table[i - argc]);
}
}
snprintf(argi, sizeof(argi), "%s%s%s%s%s", /* arg, opts, rest, post block */
iseqdat->argc > i ? "Arg" : "",
opti,
iseqdat->arg_rest == i ? "Rest" : "",
(iseqdat->arg_post_start <= i &&
i < iseqdat->arg_post_start + iseqdat->arg_post_len) ? "Post" : "",
iseqdat->arg_block == i ? "Block" : "");
snprintf(info, sizeof(info), "%s%s%s%s", name ? name : "?",
*argi ? "<" : "", argi, *argi ? ">" : "");
rb_str_catf(str, "[%2d] %-11s", iseqdat->local_size - i, info);
}
rb_str_cat2(str, "\n");
}
/* show each line */
for (n = 0; n < size;) {
n += rb_iseq_disasm_insn(str, iseq, n, iseqdat, child);
}
for (i = 0; i < RARRAY_LEN(child); i++) {
VALUE isv = rb_ary_entry(child, i);
rb_str_concat(str, rb_iseq_disasm(isv));
}
return str;
}
static VALUE
iseq_s_disasm(VALUE klass, VALUE body)
{
VALUE ret = Qnil;
rb_iseq_t *iseq;
extern rb_iseq_t *rb_method_get_iseq(VALUE body);
rb_secure(1);
if (rb_obj_is_proc(body)) {
rb_proc_t *proc;
VALUE iseqval;
GetProcPtr(body, proc);
iseqval = proc->block.iseq->self;
if (RUBY_VM_NORMAL_ISEQ_P(iseqval)) {
ret = rb_iseq_disasm(iseqval);
}
}
else if ((iseq = rb_method_get_iseq(body)) != 0) {
ret = rb_iseq_disasm(iseq->self);
}
return ret;
}
const char *
ruby_node_name(int node)
{
switch (node) {
#include "node_name.inc"
default:
rb_bug("unknown node (%d)", node);
return 0;
}
}
#define DECL_SYMBOL(name) \
static VALUE sym_##name
#define INIT_SYMBOL(name) \
sym_##name = ID2SYM(rb_intern(#name))
static VALUE
register_label(struct st_table *table, unsigned long idx)
{
VALUE sym;
char buff[8 + (sizeof(idx) * CHAR_BIT * 32 / 100)];
snprintf(buff, sizeof(buff), "label_%lu", idx);
sym = ID2SYM(rb_intern(buff));
st_insert(table, idx, sym);
return sym;
}
static VALUE
exception_type2symbol(VALUE type)
{
ID id;
switch(type) {
case CATCH_TYPE_RESCUE: CONST_ID(id, "rescue"); break;
case CATCH_TYPE_ENSURE: CONST_ID(id, "ensure"); break;
case CATCH_TYPE_RETRY: CONST_ID(id, "retry"); break;
case CATCH_TYPE_BREAK: CONST_ID(id, "break"); break;
case CATCH_TYPE_REDO: CONST_ID(id, "redo"); break;
case CATCH_TYPE_NEXT: CONST_ID(id, "next"); break;
default:
rb_bug("...");
}
return ID2SYM(id);
}
static int
cdhash_each(VALUE key, VALUE value, VALUE ary)
{
rb_ary_push(ary, obj_resurrect(key));
rb_ary_push(ary, value);
return ST_CONTINUE;
}
static VALUE
iseq_data_to_ary(rb_iseq_t *iseq)
{
long i, pos;
int line = 0;
VALUE *seq;
VALUE val = rb_ary_new();
VALUE type; /* Symbol */
VALUE locals = rb_ary_new();
VALUE args = rb_ary_new();
VALUE body = rb_ary_new(); /* [[:insn1, ...], ...] */
VALUE nbody;
VALUE exception = rb_ary_new(); /* [[....]] */
VALUE misc = rb_hash_new();
static VALUE insn_syms[VM_INSTRUCTION_SIZE];
struct st_table *labels_table = st_init_numtable();
DECL_SYMBOL(top);
DECL_SYMBOL(method);
DECL_SYMBOL(block);
DECL_SYMBOL(class);
DECL_SYMBOL(rescue);
DECL_SYMBOL(ensure);
DECL_SYMBOL(eval);
DECL_SYMBOL(main);
DECL_SYMBOL(defined_guard);
if (sym_top == 0) {
int i;
for (i=0; i<VM_INSTRUCTION_SIZE; i++) {
insn_syms[i] = ID2SYM(rb_intern(insn_name(i)));
}
INIT_SYMBOL(top);
INIT_SYMBOL(method);
INIT_SYMBOL(block);
INIT_SYMBOL(class);
INIT_SYMBOL(rescue);
INIT_SYMBOL(ensure);
INIT_SYMBOL(eval);
INIT_SYMBOL(main);
INIT_SYMBOL(defined_guard);
}
/* type */
switch(iseq->type) {
case ISEQ_TYPE_TOP: type = sym_top; break;
case ISEQ_TYPE_METHOD: type = sym_method; break;
case ISEQ_TYPE_BLOCK: type = sym_block; break;
case ISEQ_TYPE_CLASS: type = sym_class; break;
case ISEQ_TYPE_RESCUE: type = sym_rescue; break;
case ISEQ_TYPE_ENSURE: type = sym_ensure; break;
case ISEQ_TYPE_EVAL: type = sym_eval; break;
case ISEQ_TYPE_MAIN: type = sym_main; break;
case ISEQ_TYPE_DEFINED_GUARD: type = sym_defined_guard; break;
default: rb_bug("unsupported iseq type");
};
/* locals */
for (i=0; i<iseq->local_table_size; i++) {
ID lid = iseq->local_table[i];
if (lid) {
if (rb_id2str(lid)) rb_ary_push(locals, ID2SYM(lid));
}
else {
rb_ary_push(locals, ID2SYM(rb_intern("#arg_rest")));
}
}
/* args */
{
/*
* [argc, # argc
* [label1, label2, ...] # opts
* rest index,
* post_len
* post_start
* block index,
* simple,
* ]
*/
VALUE arg_opt_labels = rb_ary_new();
int j;
for (j=0; j<iseq->arg_opts; j++) {
rb_ary_push(arg_opt_labels,
register_label(labels_table, iseq->arg_opt_table[j]));
}
/* commit */
if (iseq->arg_simple == 1) {
args = INT2FIX(iseq->argc);
}
else {
rb_ary_push(args, INT2FIX(iseq->argc));
rb_ary_push(args, arg_opt_labels);
rb_ary_push(args, INT2FIX(iseq->arg_post_len));
rb_ary_push(args, INT2FIX(iseq->arg_post_start));
rb_ary_push(args, INT2FIX(iseq->arg_rest));
rb_ary_push(args, INT2FIX(iseq->arg_block));
rb_ary_push(args, INT2FIX(iseq->arg_simple));
}
}
/* body */
for (seq = iseq->iseq; seq < iseq->iseq + iseq->iseq_size; ) {
VALUE insn = *seq++;
int j, len = insn_len(insn);
VALUE *nseq = seq + len - 1;
VALUE ary = rb_ary_new2(len);
rb_ary_push(ary, insn_syms[insn]);
for (j=0; j<len-1; j++, seq++) {
switch (insn_op_type(insn, j)) {
case TS_OFFSET: {
unsigned long idx = nseq - iseq->iseq + *seq;
rb_ary_push(ary, register_label(labels_table, idx));
break;
}
case TS_LINDEX:
case TS_DINDEX:
case TS_NUM:
rb_ary_push(ary, INT2FIX(*seq));
break;
case TS_VALUE:
rb_ary_push(ary, obj_resurrect(*seq));
break;
case TS_ISEQ:
{
rb_iseq_t *iseq = (rb_iseq_t *)*seq;
if (iseq) {
VALUE val = iseq_data_to_ary(iseq);
rb_ary_push(ary, val);
}
else {
rb_ary_push(ary, Qnil);
}
}
break;
case TS_GENTRY:
{
struct rb_global_entry *entry = (struct rb_global_entry *)*seq;
rb_ary_push(ary, ID2SYM(entry->id));
}
break;
case TS_IC: {
struct iseq_inline_cache_entry *ic = (struct iseq_inline_cache_entry *)*seq;
rb_ary_push(ary, INT2FIX(ic - iseq->ic_entries));
}
break;
case TS_ID:
rb_ary_push(ary, ID2SYM(*seq));
break;
case TS_CDHASH:
{
VALUE hash = *seq;
VALUE val = rb_ary_new();
int i;
rb_hash_foreach(hash, cdhash_each, val);
for (i=0; i<RARRAY_LEN(val); i+=2) {
VALUE pos = FIX2INT(rb_ary_entry(val, i+1));
unsigned long idx = nseq - iseq->iseq + pos;
rb_ary_store(val, i+1,
register_label(labels_table, idx));
}
rb_ary_push(ary, val);
}
break;
default:
rb_bug("unknown operand: %c", insn_op_type(insn, j));
}
}
rb_ary_push(body, ary);
}
nbody = body;
/* exception */
for (i=0; i<iseq->catch_table_size; i++) {
VALUE ary = rb_ary_new();
struct iseq_catch_table_entry *entry = &iseq->catch_table[i];
rb_ary_push(ary, exception_type2symbol(entry->type));
if (entry->iseq) {
rb_iseq_t *eiseq;
GetISeqPtr(entry->iseq, eiseq);
rb_ary_push(ary, iseq_data_to_ary(eiseq));
}
else {
rb_ary_push(ary, Qnil);
}
rb_ary_push(ary, register_label(labels_table, entry->start));
rb_ary_push(ary, register_label(labels_table, entry->end));
rb_ary_push(ary, register_label(labels_table, entry->cont));
rb_ary_push(ary, INT2FIX(entry->sp));
rb_ary_push(exception, ary);
}
/* make body with labels and insert line number */
body = rb_ary_new();
for (i=0, pos=0; i<RARRAY_LEN(nbody); i++) {
VALUE ary = RARRAY_PTR(nbody)[i];
VALUE label;
if (st_lookup(labels_table, pos, &label)) {
rb_ary_push(body, label);
}
if (iseq->insn_info_table[i].line_no != line) {
line = iseq->insn_info_table[i].line_no;
rb_ary_push(body, INT2FIX(line));
}
rb_ary_push(body, ary);
pos += RARRAY_LEN(ary);
}
st_free_table(labels_table);
rb_hash_aset(misc, ID2SYM(rb_intern("arg_size")), INT2FIX(iseq->arg_size));
rb_hash_aset(misc, ID2SYM(rb_intern("local_size")), INT2FIX(iseq->local_size));
rb_hash_aset(misc, ID2SYM(rb_intern("stack_max")), INT2FIX(iseq->stack_max));
/*
* [:magic, :major_version, :minor_version, :format_type, :misc,
* :name, :filename, :filepath, :line_no, :type, :locals, :args,
* :catch_table, :bytecode]
*/
rb_ary_push(val, rb_str_new2("YARVInstructionSequence/SimpleDataFormat"));
rb_ary_push(val, INT2FIX(1)); /* major */
rb_ary_push(val, INT2FIX(2)); /* minor */
rb_ary_push(val, INT2FIX(1));
rb_ary_push(val, misc);
rb_ary_push(val, iseq->name);
rb_ary_push(val, iseq->filename);
rb_ary_push(val, iseq->filepath);
rb_ary_push(val, iseq->line_no);
rb_ary_push(val, type);
rb_ary_push(val, locals);
rb_ary_push(val, args);
rb_ary_push(val, exception);
rb_ary_push(val, body);
return val;
}
VALUE
rb_iseq_clone(VALUE iseqval, VALUE newcbase)
{
VALUE newiseq = iseq_alloc(rb_cISeq);
rb_iseq_t *iseq0, *iseq1;
GetISeqPtr(iseqval, iseq0);
GetISeqPtr(newiseq, iseq1);
*iseq1 = *iseq0;
iseq1->self = newiseq;
if (!iseq1->orig) {
iseq1->orig = iseqval;
}
if (iseq0->local_iseq == iseq0) {
iseq1->local_iseq = iseq1;
}
if (newcbase) {
iseq1->cref_stack = NEW_BLOCK(newcbase);
if (iseq0->cref_stack->nd_next) {
iseq1->cref_stack->nd_next = iseq0->cref_stack->nd_next;
}
iseq1->klass = newcbase;
}
return newiseq;
}
VALUE
rb_iseq_parameters(const rb_iseq_t *iseq, int is_proc)
{
int i, r, s;
VALUE a, args = rb_ary_new2(iseq->arg_size);
ID req, opt, rest, block;
#define PARAM_TYPE(type) rb_ary_push(a = rb_ary_new2(2), ID2SYM(type))
#define PARAM_ID(i) iseq->local_table[i]
#define PARAM(i, type) ( \
PARAM_TYPE(type), \
rb_id2name(PARAM_ID(i)) ? \
rb_ary_push(a, ID2SYM(PARAM_ID(i))) : \
a)
CONST_ID(req, "req");
CONST_ID(opt, "opt");
if (is_proc) {
for (i = 0; i < iseq->argc; i++) {
PARAM_TYPE(opt);
rb_ary_push(a, rb_id2name(PARAM_ID(i)) ? ID2SYM(PARAM_ID(i)) : Qnil);
rb_ary_push(args, a);
}
}
else {
for (i = 0; i < iseq->argc; i++) {
rb_ary_push(args, PARAM(i, req));
}
}
r = iseq->arg_rest != -1 ? iseq->arg_rest :
iseq->arg_post_len > 0 ? iseq->arg_post_start :
iseq->arg_block != -1 ? iseq->arg_block :
iseq->arg_size;
for (s = i; i < r; i++) {
PARAM_TYPE(opt);
if (rb_id2name(PARAM_ID(i))) {
rb_ary_push(a, ID2SYM(PARAM_ID(i)));
}
rb_ary_push(args, a);
}
if (iseq->arg_rest != -1) {
CONST_ID(rest, "rest");
rb_ary_push(args, PARAM(iseq->arg_rest, rest));
}
r = iseq->arg_post_start + iseq->arg_post_len;
if (is_proc) {
for (i = iseq->arg_post_start; i < r; i++) {
PARAM_TYPE(opt);
rb_ary_push(a, rb_id2name(PARAM_ID(i)) ? ID2SYM(PARAM_ID(i)) : Qnil);
rb_ary_push(args, a);
}
}
else {
for (i = iseq->arg_post_start; i < r; i++) {
rb_ary_push(args, PARAM(i, req));
}
}
if (iseq->arg_block != -1) {
CONST_ID(block, "block");
rb_ary_push(args, PARAM(iseq->arg_block, block));
}
return args;
}
/* ruby2cext */
VALUE
rb_iseq_build_for_ruby2cext(
const rb_iseq_t *iseq_template,
const rb_insn_func_t *func,
const struct iseq_insn_info_entry *insn_info_table,
const char **local_table,
const VALUE *arg_opt_table,
const struct iseq_catch_table_entry *catch_table,
const char *name,
const char *filename,
const unsigned short line_no)
{
unsigned long i;
VALUE iseqval = iseq_alloc(rb_cISeq);
rb_iseq_t *iseq;
GetISeqPtr(iseqval, iseq);
/* copy iseq */
*iseq = *iseq_template;
iseq->name = rb_str_new2(name);
iseq->filename = rb_str_new2(filename);
iseq->line_no = line_no;
iseq->mark_ary = rb_ary_tmp_new(3);
OBJ_UNTRUST(iseq->mark_ary);
iseq->self = iseqval;
iseq->iseq = ALLOC_N(VALUE, iseq->iseq_size);
for (i=0; i<iseq->iseq_size; i+=2) {
iseq->iseq[i] = BIN(opt_call_c_function);
iseq->iseq[i+1] = (VALUE)func;
}
rb_iseq_translate_threaded_code(iseq);
#define ALLOC_AND_COPY(dst, src, type, size) do { \
if (size) { \
(dst) = ALLOC_N(type, (size)); \
MEMCPY((dst), (src), type, (size)); \
} \
} while (0)
ALLOC_AND_COPY(iseq->insn_info_table, insn_info_table,
struct iseq_insn_info_entry, iseq->insn_info_size);
ALLOC_AND_COPY(iseq->catch_table, catch_table,
struct iseq_catch_table_entry, iseq->catch_table_size);
ALLOC_AND_COPY(iseq->arg_opt_table, arg_opt_table,
VALUE, iseq->arg_opts);
set_relation(iseq, 0);
return iseqval;
}
void
Init_ISeq(void)
{
/* declare ::VM::InstructionSequence */
rb_cISeq = rb_define_class_under(rb_cRubyVM, "InstructionSequence", rb_cObject);
rb_define_alloc_func(rb_cISeq, iseq_alloc);
rb_define_method(rb_cISeq, "inspect", iseq_inspect, 0);
rb_define_method(rb_cISeq, "disasm", rb_iseq_disasm, 0);
rb_define_method(rb_cISeq, "disassemble", rb_iseq_disasm, 0);
rb_define_method(rb_cISeq, "to_a", iseq_to_a, 0);
rb_define_method(rb_cISeq, "eval", iseq_eval, 0);
/* disable this feature because there is no verifier. */
/* rb_define_singleton_method(rb_cISeq, "load", iseq_s_load, -1); */
(void)iseq_s_load;
rb_define_singleton_method(rb_cISeq, "compile", iseq_s_compile, -1);
rb_define_singleton_method(rb_cISeq, "new", iseq_s_compile, -1);
rb_define_singleton_method(rb_cISeq, "compile_file", iseq_s_compile_file, -1);
rb_define_singleton_method(rb_cISeq, "compile_option", iseq_s_compile_option_get, 0);
rb_define_singleton_method(rb_cISeq, "compile_option=", iseq_s_compile_option_set, 1);
rb_define_singleton_method(rb_cISeq, "disasm", iseq_s_disasm, 1);
rb_define_singleton_method(rb_cISeq, "disassemble", iseq_s_disasm, 1);
}
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