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ruby--ruby/eval.c
matz 0e47c138c9 matz 
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@1068 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
2000-12-22 03:22:25 +00:00

8632 lines
180 KiB
C
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/**********************************************************************
eval.c -
$Author$
$Date$
created at: Thu Jun 10 14:22:17 JST 1993
Copyright (C) 1993-2000 Yukihiro Matsumoto
Copyright (C) 2000 Network Applied Communication Laboratory, Inc.
Copyright (C) 2000 Information-technology Promotion Agency, Japan
**********************************************************************/
#include "ruby.h"
#include "node.h"
#include "env.h"
#include "rubysig.h"
#include <stdio.h>
#include <setjmp.h>
#include "st.h"
#include "dln.h"
#ifdef HAVE_STDARG_PROTOTYPES
#include <stdarg.h>
#define va_init_list(a,b) va_start(a,b)
#else
#include <varargs.h>
#define va_init_list(a,b) va_start(a)
#endif
#ifndef HAVE_STRING_H
char *strrchr _((const char*,const char));
#endif
#ifdef HAVE_UNISTD_H
#include <unistd.h>
#endif
#ifdef __BEOS__
#include <net/socket.h>
#endif
#ifdef __MACOS__
#include "macruby_private.h"
#endif
#ifndef setjmp
#ifdef HAVE__SETJMP
#define setjmp(env) _setjmp(env)
#define longjmp(env,val) _longjmp(env,val)
#endif
#endif
#include <sys/types.h>
#ifdef HAVE_SYS_TIME_H
# include <sys/time.h>
#else
#ifndef NT
struct timeval {
long tv_sec; /* seconds */
long tv_usec; /* and microseconds */
};
#endif /* NT */
#endif
#include <signal.h>
#include <errno.h>
#ifdef HAVE_SYS_SELECT_H
#include <sys/select.h>
#endif
#ifdef HAVE_SYS_RESOURCE_H
#include <sys/resource.h>
#endif
#include <sys/stat.h>
VALUE rb_cProc;
static VALUE rb_cBinding;
static VALUE proc_call _((VALUE,VALUE));
static VALUE rb_f_binding _((VALUE));
static void rb_f_END _((void));
static VALUE rb_f_block_given_p _((void));
static VALUE block_pass _((VALUE,NODE*));
static VALUE rb_cMethod;
static VALUE method_proc _((VALUE));
static VALUE method_call _((int, VALUE*, VALUE));
static VALUE rb_cUnboundMethod;
static VALUE umethod_bind _((VALUE, VALUE));
static VALUE rb_mod_define_method _((int, VALUE*, VALUE));
static int scope_vmode;
#define SCOPE_PUBLIC 0
#define SCOPE_PRIVATE 1
#define SCOPE_PROTECTED 2
#define SCOPE_MODFUNC 5
#define SCOPE_MASK 7
#define SCOPE_SET(f) do {scope_vmode=(f);} while(0)
#define SCOPE_TEST(f) (scope_vmode&(f))
int ruby_safe_level = 0;
/* safe-level:
0 - strings from streams/environment/ARGV are tainted (default)
1 - no dangerous operation by tainted value
2 - process/file operations prohibited
3 - all genetated objects are tainted
4 - no global (non-tainted) variable modification/no direct output
*/
void
rb_set_safe_level(level)
int level;
{
if (level > ruby_safe_level) {
ruby_safe_level = level;
}
}
static VALUE
safe_getter()
{
return INT2FIX(ruby_safe_level);
}
static void
safe_setter(val)
VALUE val;
{
int level = NUM2INT(val);
if (level < ruby_safe_level) {
rb_raise(rb_eSecurityError, "tried to downgrade safe level from %d to %d",
ruby_safe_level, level);
}
ruby_safe_level = level;
}
void
rb_secure(level)
int level;
{
if (level <= ruby_safe_level) {
rb_raise(rb_eSecurityError, "Insecure operation `%s' at level %d",
rb_id2name(ruby_frame->last_func), ruby_safe_level);
}
}
void
rb_check_safe_str(x)
VALUE x;
{
if (ruby_safe_level > 0 && OBJ_TAINTED(x)){
if (ruby_frame->last_func) {
rb_raise(rb_eSecurityError, "Insecure operation - %s",
rb_id2name(ruby_frame->last_func));
}
else {
rb_raise(rb_eSecurityError, "Insecure operation: -r");
}
}
rb_secure(4);
if (TYPE(x)!= T_STRING) {
rb_raise(rb_eTypeError, "wrong argument type %s (expected String)",
rb_class2name(CLASS_OF(x)));
}
}
static void print_undef _((VALUE, ID)) NORETURN;
static void
print_undef(klass, id)
VALUE klass;
ID id;
{
rb_raise(rb_eNameError, "undefined method `%s' for %s `%s'",
rb_id2name(id),
(TYPE(klass) == T_MODULE)?"module":"class",
rb_class2name(klass));
}
#define CACHE_SIZE 0x800
#define CACHE_MASK 0x7ff
#define EXPR1(c,m) ((((c)>>3)^(m))&CACHE_MASK)
struct cache_entry { /* method hash table. */
ID mid; /* method's id */
ID mid0; /* method's original id */
VALUE klass; /* receiver's class */
VALUE origin; /* where method defined */
NODE *method;
int noex;
};
static struct cache_entry cache[CACHE_SIZE];
void
rb_clear_cache()
{
struct cache_entry *ent, *end;
ent = cache; end = ent + CACHE_SIZE;
while (ent < end) {
ent->mid = 0;
ent++;
}
}
static void
rb_clear_cache_by_id(id)
ID id;
{
struct cache_entry *ent, *end;
ent = cache; end = ent + CACHE_SIZE;
while (ent < end) {
if (ent->mid == id) {
ent->mid = 0;
}
ent++;
}
}
void
rb_add_method(klass, mid, node, noex)
VALUE klass;
ID mid;
NODE *node;
int noex;
{
NODE *body;
if (NIL_P(klass)) klass = rb_cObject;
if (klass == rb_cObject) {
rb_secure(4);
}
if (rb_safe_level() >= 4 && !OBJ_TAINTED(klass)) {
rb_raise(rb_eSecurityError, "Insecure: can't define method");
}
if (OBJ_FROZEN(klass)) rb_error_frozen("class/module");
body = NEW_METHOD(node, noex);
st_insert(RCLASS(klass)->m_tbl, mid, body);
}
static NODE*
search_method(klass, id, origin)
VALUE klass, *origin;
ID id;
{
NODE *body;
if (!klass) return 0;
while (!st_lookup(RCLASS(klass)->m_tbl, id, &body)) {
klass = RCLASS(klass)->super;
if (!klass) return 0;
}
if (origin) *origin = klass;
return body;
}
static NODE*
rb_get_method_body(klassp, idp, noexp)
VALUE *klassp;
ID *idp;
int *noexp;
{
ID id = *idp;
VALUE klass = *klassp;
VALUE origin;
NODE * volatile body;
struct cache_entry *ent;
if ((body = search_method(klass, id, &origin)) == 0 || !body->nd_body) {
/* store empty info in cache */
ent = cache + EXPR1(klass, id);
ent->klass = klass;
ent->origin = klass;
ent->mid = ent->mid0 = id;
ent->noex = 0;
ent->method = 0;
return 0;
}
/* store in cache */
ent = cache + EXPR1(klass, id);
ent->klass = klass;
ent->noex = body->nd_noex;
body = body->nd_body;
if (nd_type(body) == NODE_FBODY) {
ent->mid = id;
*klassp = body->nd_orig;
ent->origin = body->nd_orig;
*idp = ent->mid0 = body->nd_mid;
body = ent->method = body->nd_head;
}
else {
*klassp = origin;
ent->origin = origin;
ent->mid = ent->mid0 = id;
ent->method = body;
}
if (noexp) *noexp = ent->noex;
return body;
}
static void
remove_method(klass, mid)
VALUE klass;
ID mid;
{
NODE *body;
if (klass == rb_cObject) {
rb_secure(4);
}
if (rb_safe_level() >= 4 && !OBJ_TAINTED(klass)) {
rb_raise(rb_eSecurityError, "Insecure: can't remove method");
}
if (OBJ_FROZEN(klass)) rb_error_frozen("class/module");
if (!st_delete(RCLASS(klass)->m_tbl, &mid, &body)) {
rb_raise(rb_eNameError, "method `%s' not defined in %s",
rb_id2name(mid), rb_class2name(klass));
}
rb_clear_cache_by_id(mid);
}
void
rb_remove_method(klass, name)
VALUE klass;
const char *name;
{
remove_method(klass, rb_intern(name));
}
static VALUE
rb_mod_remove_method(mod, name)
VALUE mod, name;
{
remove_method(mod, rb_to_id(name));
return mod;
}
void
rb_disable_super(klass, name)
VALUE klass;
const char *name;
{
VALUE origin;
NODE *body;
ID mid = rb_intern(name);
body = search_method(klass, mid, &origin);
if (!body || !body->nd_body) {
print_undef(klass, mid);
}
if (origin == klass) {
body->nd_noex |= NOEX_UNDEF;
}
else {
rb_add_method(klass, mid, 0, NOEX_UNDEF);
rb_clear_cache_by_id(mid);
}
}
void
rb_enable_super(klass, name)
VALUE klass;
const char *name;
{
VALUE origin;
NODE *body;
ID mid = rb_intern(name);
body = search_method(klass, mid, &origin);
if (!body) {
print_undef(klass, mid);
}
if (!body->nd_body) {
remove_method(klass, mid);
}
else {
body->nd_noex &= ~NOEX_UNDEF;
}
}
static void
rb_export_method(klass, name, noex)
VALUE klass;
ID name;
ID noex;
{
NODE *body;
VALUE origin;
if (klass == rb_cObject) {
rb_secure(4);
}
body = search_method(klass, name, &origin);
if (!body && TYPE(klass) == T_MODULE) {
body = search_method(rb_cObject, name, &origin);
}
if (!body) {
print_undef(klass, name);
}
if (body->nd_noex != noex) {
if (klass == origin) {
body->nd_noex = noex;
}
else {
rb_add_method(klass, name, NEW_ZSUPER(), noex);
rb_clear_cache_by_id(name);
}
}
}
int
rb_method_boundp(klass, id, ex)
VALUE klass;
ID id;
int ex;
{
struct cache_entry *ent;
int noex;
/* is it in the method cache? */
ent = cache + EXPR1(klass, id);
if (ent->mid == id && ent->klass == klass) {
if (ex && (ent->noex & NOEX_PRIVATE))
return Qfalse;
if (!ent->method) return Qfalse;
return Qtrue;
}
if (rb_get_method_body(&klass, &id, &noex)) {
if (ex && (noex & NOEX_PRIVATE))
return Qfalse;
return Qtrue;
}
return Qfalse;
}
static ID init, eqq, each, aref, aset, match, to_ary;
static ID missing, added, singleton_added;
static ID __id__, __send__;
void
rb_attr(klass, id, read, write, ex)
VALUE klass;
ID id;
int read, write, ex;
{
const char *name;
char *buf;
ID attriv;
int noex;
if (!ex) noex = NOEX_PUBLIC;
else {
if (SCOPE_TEST(SCOPE_PRIVATE)) {
noex = NOEX_PRIVATE;
rb_warning("private attribute?");
}
else if (SCOPE_TEST(SCOPE_PROTECTED)) {
noex = NOEX_PROTECTED;
}
else {
noex = NOEX_PUBLIC;
}
}
name = rb_id2name(id);
if (!name) {
rb_raise(rb_eArgError, "argument needs to be symbol or string");
}
buf = ALLOCA_N(char,strlen(name)+2);
sprintf(buf, "@%s", name);
attriv = rb_intern(buf);
if (read) {
rb_add_method(klass, id, NEW_IVAR(attriv), noex);
rb_clear_cache_by_id(id);
rb_funcall(klass, added, 1, ID2SYM(id));
}
sprintf(buf, "%s=", name);
id = rb_intern(buf);
if (write) {
rb_add_method(klass, id, NEW_ATTRSET(attriv), noex);
rb_clear_cache_by_id(id);
rb_funcall(klass, added, 1, ID2SYM(id));
}
}
extern int ruby_in_compile;
VALUE ruby_errinfo = Qnil;
extern NODE *ruby_eval_tree_begin;
extern NODE *ruby_eval_tree;
extern int ruby_nerrs;
static VALUE rb_eLocalJumpError;
static VALUE rb_eSysStackError;
extern VALUE ruby_top_self;
struct FRAME *ruby_frame;
struct SCOPE *ruby_scope;
static struct FRAME *top_frame;
static struct SCOPE *top_scope;
#define PUSH_FRAME() { \
struct FRAME _frame; \
_frame.prev = ruby_frame; \
_frame.tmp = 0; \
_frame.file = ruby_sourcefile; \
_frame.line = ruby_sourceline; \
_frame.iter = ruby_iter->iter; \
_frame.cbase = ruby_frame->cbase; \
_frame.argc = 0; \
_frame.argv = 0; \
_frame.flags = FRAME_ALLOCA; \
ruby_frame = &_frame; \
#define POP_FRAME() \
ruby_sourcefile = _frame.file; \
ruby_sourceline = _frame.line; \
ruby_frame = _frame.prev; }
struct BLOCK {
NODE *var;
NODE *body;
VALUE self;
struct FRAME frame;
struct SCOPE *scope;
VALUE klass;
struct tag *tag;
int iter;
int vmode;
int flags;
struct RVarmap *dyna_vars;
VALUE orig_thread;
struct BLOCK *prev;
};
#define BLOCK_D_SCOPE 1
#define BLOCK_DYNAMIC 2
static struct BLOCK *ruby_block;
#define PUSH_BLOCK(v,b) { \
struct BLOCK _block; \
_block.tag = prot_tag; \
_block.var = v; \
_block.body = b; \
_block.self = self; \
_block.frame = *ruby_frame; \
_block.klass = ruby_class; \
_block.frame.file = ruby_sourcefile;\
_block.frame.line = ruby_sourceline;\
_block.scope = ruby_scope; \
_block.prev = ruby_block; \
_block.iter = ruby_iter->iter; \
_block.vmode = scope_vmode; \
_block.flags = BLOCK_D_SCOPE; \
_block.dyna_vars = ruby_dyna_vars; \
ruby_block = &_block;
#define POP_BLOCK() \
ruby_block = _block.prev; \
}
#define PUSH_BLOCK2(b) { \
struct BLOCK * volatile _old; \
_old = ruby_block; \
ruby_block = b;
#define POP_BLOCK2() \
ruby_block = _old; \
}
struct RVarmap *ruby_dyna_vars;
#define PUSH_VARS() { \
struct RVarmap * volatile _old; \
_old = ruby_dyna_vars; \
ruby_dyna_vars = 0;
#define POP_VARS() \
ruby_dyna_vars = _old; \
}
#define DVAR_DONT_RECYCLE FL_USER2
static struct RVarmap*
new_dvar(id, value, prev)
ID id;
VALUE value;
struct RVarmap *prev;
{
NEWOBJ(vars, struct RVarmap);
OBJSETUP(vars, 0, T_VARMAP);
vars->id = id;
vars->val = value;
vars->next = prev;
return vars;
}
VALUE
rb_dvar_defined(id)
ID id;
{
struct RVarmap *vars = ruby_dyna_vars;
while (vars) {
if (vars->id == id) return Qtrue;
vars = vars->next;
}
return Qfalse;
}
VALUE
rb_dvar_curr(id)
ID id;
{
struct RVarmap *vars = ruby_dyna_vars;
while (vars) {
if (vars->id == 0) break;
if (vars->id == id) return Qtrue;
vars = vars->next;
}
return Qfalse;
}
VALUE
rb_dvar_ref(id)
ID id;
{
struct RVarmap *vars = ruby_dyna_vars;
while (vars) {
if (vars->id == id) {
return vars->val;
}
vars = vars->next;
}
return Qnil;
}
void
rb_dvar_push(id, value)
ID id;
VALUE value;
{
ruby_dyna_vars = new_dvar(id, value, ruby_dyna_vars);
}
static void
dvar_asgn_internal(id, value, curr)
ID id;
VALUE value;
int curr;
{
int n = 0;
struct RVarmap *vars = ruby_dyna_vars;
while (vars) {
if (curr && vars->id == 0) {
n++;
if (n == 2) break;
}
if (vars->id == id) {
vars->val = value;
return;
}
vars = vars->next;
}
if (!ruby_dyna_vars) {
ruby_dyna_vars = new_dvar(id, value, 0);
}
else {
vars = new_dvar(id, value, ruby_dyna_vars->next);
ruby_dyna_vars->next = vars;
}
}
void
dvar_asgn(id, value)
ID id;
VALUE value;
{
dvar_asgn_internal(id, value, 0);
}
static void
dvar_asgn_curr(id, value)
ID id;
VALUE value;
{
dvar_asgn_internal(id, value, 1);
}
struct iter {
int iter;
struct iter *prev;
};
static struct iter *ruby_iter;
#define ITER_NOT 0
#define ITER_PRE 1
#define ITER_CUR 2
#define PUSH_ITER(i) { \
struct iter _iter; \
_iter.prev = ruby_iter; \
_iter.iter = (i); \
ruby_iter = &_iter; \
#define POP_ITER() \
ruby_iter = _iter.prev; \
}
struct tag {
jmp_buf buf;
struct FRAME *frame;
struct iter *iter;
ID tag;
VALUE retval;
struct SCOPE *scope;
int dst;
struct tag *prev;
};
static struct tag *prot_tag;
#define PUSH_TAG(ptag) { \
struct tag _tag; \
_tag.retval = Qnil; \
_tag.frame = ruby_frame; \
_tag.iter = ruby_iter; \
_tag.prev = prot_tag; \
_tag.retval = Qnil; \
_tag.scope = ruby_scope; \
_tag.tag = ptag; \
_tag.dst = 0; \
prot_tag = &_tag;
#define PROT_NONE 0
#define PROT_FUNC -1
#define PROT_THREAD -2
#define EXEC_TAG() setjmp(prot_tag->buf)
#define JUMP_TAG(st) { \
ruby_frame = prot_tag->frame; \
ruby_iter = prot_tag->iter; \
longjmp(prot_tag->buf,(st)); \
}
#define POP_TAG() \
if (_tag.prev) \
_tag.prev->retval = _tag.retval;\
prot_tag = _tag.prev; \
}
#define POP_TMPTAG() \
prot_tag = _tag.prev; \
}
#define TAG_RETURN 0x1
#define TAG_BREAK 0x2
#define TAG_NEXT 0x3
#define TAG_RETRY 0x4
#define TAG_REDO 0x5
#define TAG_RAISE 0x6
#define TAG_THROW 0x7
#define TAG_FATAL 0x8
#define TAG_MASK 0xf
VALUE ruby_class;
static VALUE ruby_wrapper; /* security wrapper */
#define PUSH_CLASS() { \
VALUE _class = ruby_class; \
#define POP_CLASS() ruby_class = _class; }
#define PUSH_SCOPE() { \
volatile int _vmode = scope_vmode; \
struct SCOPE * volatile _old; \
NEWOBJ(_scope, struct SCOPE); \
OBJSETUP(_scope, 0, T_SCOPE); \
_scope->local_tbl = 0; \
_scope->local_vars = 0; \
_scope->flag = 0; \
_old = ruby_scope; \
ruby_scope = _scope; \
scope_vmode = SCOPE_PUBLIC;
typedef struct thread * rb_thread_t;
static rb_thread_t curr_thread = 0;
static rb_thread_t main_thread;
static void scope_dup _((struct SCOPE *));
#define POP_SCOPE() \
if (ruby_scope->flag & SCOPE_DONT_RECYCLE) {\
if (_old) scope_dup(_old); \
} \
if (!(ruby_scope->flag & SCOPE_MALLOC)) {\
ruby_scope->local_vars = 0; \
ruby_scope->local_tbl = 0; \
if (!(ruby_scope->flag & SCOPE_DONT_RECYCLE) && \
ruby_scope != top_scope) { \
rb_gc_force_recycle((VALUE)ruby_scope);\
} \
} \
ruby_scope->flag |= SCOPE_NOSTACK; \
ruby_scope = _old; \
scope_vmode = _vmode; \
}
static VALUE rb_eval _((VALUE,NODE*));
static VALUE eval _((VALUE,VALUE,VALUE,char*,int));
static NODE *compile _((VALUE, char*, int));
static VALUE rb_yield_0 _((VALUE, VALUE, VALUE, int));
static VALUE rb_call _((VALUE,VALUE,ID,int,VALUE*,int));
static VALUE module_setup _((VALUE,NODE*));
static VALUE massign _((VALUE,NODE*,VALUE,int));
static void assign _((VALUE,NODE*,VALUE,int));
static VALUE trace_func = 0;
static int tracing = 0;
static void call_trace_func _((char*,char*,int,VALUE,ID,VALUE));
static void
error_pos()
{
if (ruby_sourcefile) {
if (ruby_frame->last_func) {
fprintf(stderr, "%s:%d:in `%s'", ruby_sourcefile, ruby_sourceline,
rb_id2name(ruby_frame->last_func));
}
else if (ruby_sourceline == 0) {
fprintf(stderr, "%s", ruby_sourcefile);
}
else {
fprintf(stderr, "%s:%d", ruby_sourcefile, ruby_sourceline);
}
}
}
static VALUE
get_backtrace(info)
VALUE info;
{
if (NIL_P(info)) return Qnil;
return rb_funcall(info, rb_intern("backtrace"), 0);
}
static void
set_backtrace(info, bt)
VALUE info, bt;
{
rb_funcall(info, rb_intern("set_backtrace"), 1, bt);
}
static void
error_print()
{
VALUE errat = Qnil; /* OK */
volatile VALUE eclass;
char *einfo;
int elen;
if (NIL_P(ruby_errinfo)) return;
PUSH_TAG(PROT_NONE);
if (EXEC_TAG() == 0) {
errat = get_backtrace(ruby_errinfo);
}
else {
errat = Qnil;
}
POP_TAG();
if (NIL_P(errat)) {
if (ruby_sourcefile)
fprintf(stderr, "%s:%d", ruby_sourcefile, ruby_sourceline);
else
fprintf(stderr, "%d", ruby_sourceline);
}
else {
VALUE mesg = RARRAY(errat)->ptr[0];
if (NIL_P(mesg)) error_pos();
else {
fwrite(RSTRING(mesg)->ptr, 1, RSTRING(mesg)->len, stderr);
}
}
eclass = CLASS_OF(ruby_errinfo);
PUSH_TAG(PROT_NONE);
if (EXEC_TAG() == 0) {
einfo = str2cstr(rb_obj_as_string(ruby_errinfo), &elen);
}
else {
einfo = "";
elen = 0;
}
POP_TAG();
if (eclass == rb_eRuntimeError && elen == 0) {
fprintf(stderr, ": unhandled exception\n");
}
else {
VALUE epath;
epath = rb_class_path(eclass);
if (elen == 0) {
fprintf(stderr, ": ");
fwrite(RSTRING(epath)->ptr, 1, RSTRING(epath)->len, stderr);
putc('\n', stderr);
}
else {
char *tail = 0;
int len = elen;
if (RSTRING(epath)->ptr[0] == '#') epath = 0;
if (tail = strchr(einfo, '\n')) {
len = tail - einfo;
tail++; /* skip newline */
}
fprintf(stderr, ": ");
fwrite(einfo, 1, len, stderr);
if (epath) {
fprintf(stderr, " (");
fwrite(RSTRING(epath)->ptr, 1, RSTRING(epath)->len, stderr);
fprintf(stderr, ")\n");
}
if (tail) {
fwrite(tail, 1, elen-len-1, stderr);
putc('\n', stderr);
}
}
}
if (!NIL_P(errat)) {
int i;
struct RArray *ep = RARRAY(errat);
#define TRACE_MAX (TRACE_HEAD+TRACE_TAIL+5)
#define TRACE_HEAD 8
#define TRACE_TAIL 5
ep = RARRAY(errat);
for (i=1; i<ep->len; i++) {
if (TYPE(ep->ptr[i]) == T_STRING) {
fprintf(stderr, "\tfrom %s\n", RSTRING(ep->ptr[i])->ptr);
}
if (i == TRACE_HEAD && ep->len > TRACE_MAX) {
fprintf(stderr, "\t ... %ld levels...\n",
ep->len - TRACE_HEAD - TRACE_TAIL);
i = ep->len - TRACE_TAIL;
}
}
}
}
#if !defined(NT) && !defined(__MACOS__)
extern char **environ;
#endif
char **rb_origenviron;
void rb_call_inits _((void));
void Init_stack _((void*));
void Init_heap _((void));
void Init_ext _((void));
void
ruby_init()
{
static int initialized = 0;
static struct FRAME frame;
static struct iter iter;
int state;
if (initialized)
return;
initialized = 1;
ruby_frame = top_frame = &frame;
ruby_iter = &iter;
#ifdef __MACOS__
rb_origenviron = 0;
#else
rb_origenviron = environ;
#endif
Init_stack(0);
Init_heap();
PUSH_SCOPE();
ruby_scope->local_vars = 0;
ruby_scope->local_tbl = 0;
top_scope = ruby_scope;
/* default visibility is private at toplevel */
SCOPE_SET(SCOPE_PRIVATE);
PUSH_TAG(PROT_NONE);
if ((state = EXEC_TAG()) == 0) {
rb_call_inits();
ruby_class = rb_cObject;
ruby_frame->self = ruby_top_self;
ruby_frame->cbase = (VALUE)rb_node_newnode(NODE_CREF,rb_cObject,0,0);
rb_define_global_const("TOPLEVEL_BINDING", rb_f_binding(ruby_top_self));
#ifdef __MACOS__
_macruby_init();
#endif
ruby_prog_init();
}
POP_TAG();
if (state) error_print();
POP_SCOPE();
ruby_scope = top_scope;
}
static VALUE
eval_node(self, node)
VALUE self;
NODE *node;
{
NODE *beg_tree = ruby_eval_tree_begin;
ruby_eval_tree_begin = 0;
if (beg_tree) {
rb_eval(self, beg_tree);
}
if (!node) return Qnil;
return rb_eval(self, node);
}
int ruby_in_eval;
static void rb_thread_cleanup _((void));
static void rb_thread_wait_other_threads _((void));
static int exit_status;
static int
error_handle(ex)
int ex;
{
switch (ex & 0xf) {
case 0:
ex = 0;
break;
case TAG_RETURN:
error_pos();
fprintf(stderr, ": unexpected return\n");
ex = 1;
break;
case TAG_NEXT:
error_pos();
fprintf(stderr, ": unexpected next\n");
ex = 1;
break;
case TAG_BREAK:
error_pos();
fprintf(stderr, ": unexpected break\n");
ex = 1;
break;
case TAG_REDO:
error_pos();
fprintf(stderr, ": unexpected redo\n");
ex = 1;
break;
case TAG_RETRY:
error_pos();
fprintf(stderr, ": retry outside of rescue clause\n");
ex = 1;
break;
case TAG_RAISE:
case TAG_FATAL:
if (rb_obj_is_kind_of(ruby_errinfo, rb_eSystemExit)) {
ex = exit_status;
}
else {
error_print();
ex = 1;
}
break;
default:
rb_bug("Unknown longjmp status %d", ex);
break;
}
return ex;
}
void
ruby_options(argc, argv)
int argc;
char **argv;
{
int state;
PUSH_TAG(PROT_NONE)
if ((state = EXEC_TAG()) == 0) {
ruby_process_options(argc, argv);
}
POP_TAG();
if (state) {
trace_func = 0;
tracing = 0;
exit(error_handle(state));
}
}
void rb_exec_end_proc _((void));
void
ruby_finalize()
{
rb_trap_exit();
rb_exec_end_proc();
rb_gc_call_finalizer_at_exit();
}
void
ruby_stop(ex)
int ex;
{
int state;
PUSH_TAG(PROT_NONE);
PUSH_ITER(ITER_NOT);
if ((state = EXEC_TAG()) == 0) {
rb_thread_cleanup();
rb_thread_wait_other_threads();
}
else if (ex == 0) {
ex = state;
}
POP_ITER();
POP_TAG();
ex = error_handle(ex);
ruby_finalize();
exit(ex);
}
void
ruby_run()
{
int state;
static int ex;
volatile NODE *tmp;
if (ruby_nerrs > 0) exit(ruby_nerrs);
Init_stack(&tmp);
PUSH_TAG(PROT_NONE);
PUSH_ITER(ITER_NOT);
if ((state = EXEC_TAG()) == 0) {
eval_node(ruby_top_self, ruby_eval_tree);
}
POP_ITER();
POP_TAG();
if (state && !ex) ex = state;
ruby_stop(ex);
}
static void
compile_error(at)
const char *at;
{
VALUE str;
ruby_nerrs = 0;
str = rb_str_new2("compile error");
if (at) {
rb_str_cat2(str, " in ");
rb_str_cat2(str, at);
}
rb_str_cat(str, "\n", 1);
if (!NIL_P(ruby_errinfo)) {
rb_str_concat(str, ruby_errinfo);
}
rb_exc_raise(rb_exc_new3(rb_eSyntaxError, str));
}
VALUE
rb_eval_string(str)
const char *str;
{
VALUE v;
char *oldsrc = ruby_sourcefile;
ruby_sourcefile = "(eval)";
v = eval(ruby_top_self, rb_str_new2(str), Qnil, 0, 0);
ruby_sourcefile = oldsrc;
return v;
}
VALUE
rb_eval_string_protect(str, state)
const char *str;
int *state;
{
VALUE result; /* OK */
int status;
PUSH_TAG(PROT_NONE);
if ((status = EXEC_TAG()) == 0) {
result = rb_eval_string(str);
}
POP_TAG();
if (state) {
*state = status;
}
if (status != 0) {
return Qnil;
}
return result;
}
VALUE
rb_eval_string_wrap(str, state)
const char *str;
int *state;
{
int status;
VALUE self = ruby_top_self;
VALUE val;
PUSH_CLASS();
ruby_class = ruby_wrapper = rb_module_new();
ruby_top_self = rb_obj_clone(ruby_top_self);
rb_extend_object(self, ruby_class);
val = rb_eval_string_protect(str, &status);
ruby_top_self = self;
POP_CLASS();
if (state) {
*state = status;
}
else if (status) {
JUMP_TAG(status);
}
return val;
}
VALUE
rb_eval_cmd(cmd, arg)
VALUE cmd, arg;
{
int state;
VALUE val; /* OK */
struct SCOPE *saved_scope;
volatile int safe = ruby_safe_level;
if (TYPE(cmd) != T_STRING) {
return rb_funcall2(cmd, rb_intern("call"),
RARRAY(arg)->len, RARRAY(arg)->ptr);
}
PUSH_CLASS();
PUSH_TAG(PROT_NONE);
saved_scope = ruby_scope;
ruby_scope = top_scope;
ruby_class = rb_cObject;
if (OBJ_TAINTED(cmd)) {
ruby_safe_level = 4;
}
if ((state = EXEC_TAG()) == 0) {
val = eval(ruby_top_self, cmd, Qnil, 0, 0);
}
if (ruby_scope->flag & SCOPE_DONT_RECYCLE)
scope_dup(saved_scope);
ruby_scope = saved_scope;
ruby_safe_level = safe;
POP_TAG();
POP_CLASS();
switch (state) {
case 0:
break;
case TAG_RETURN:
rb_raise(rb_eLocalJumpError, "unexpected return");
break;
case TAG_NEXT:
rb_raise(rb_eLocalJumpError, "unexpected next");
break;
case TAG_BREAK:
rb_raise(rb_eLocalJumpError, "unexpected break");
break;
case TAG_REDO:
rb_raise(rb_eLocalJumpError, "unexpected redo");
break;
case TAG_RETRY:
rb_raise(rb_eLocalJumpError, "retry outside of rescue clause");
break;
default:
JUMP_TAG(state);
break;
}
return val;
}
static VALUE
rb_trap_eval(cmd, sig)
VALUE cmd;
int sig;
{
int state;
VALUE val; /* OK */
PUSH_TAG(PROT_NONE);
if ((state = EXEC_TAG()) == 0) {
val = rb_eval_cmd(cmd, rb_ary_new3(1, INT2FIX(sig)));
}
POP_TAG();
if (state) {
rb_trap_immediate = 0;
JUMP_TAG(state);
}
return val;
}
static VALUE
superclass(self, node)
VALUE self;
NODE *node;
{
VALUE val; /* OK */
int state;
PUSH_TAG(PROT_NONE);
if ((state = EXEC_TAG()) == 0) {
val = rb_eval(self, node);
}
POP_TAG();
if (state) {
superclass_error:
switch (nd_type(node)) {
case NODE_COLON2:
rb_raise(rb_eTypeError, "undefined superclass `%s'",
rb_id2name(node->nd_mid));
case NODE_CONST:
rb_raise(rb_eTypeError, "undefined superclass `%s'",
rb_id2name(node->nd_vid));
default:
rb_raise(rb_eTypeError, "superclass undefined");
}
JUMP_TAG(state);
}
if (TYPE(val) != T_CLASS) goto superclass_error;
if (FL_TEST(val, FL_SINGLETON)) {
rb_raise(rb_eTypeError, "can't make subclass of virtual class");
}
return val;
}
#define ruby_cbase (RNODE(ruby_frame->cbase)->nd_clss)
static VALUE
ev_const_defined(cref, id)
NODE *cref;
ID id;
{
NODE *cbase = cref;
while (cbase && cbase->nd_clss != rb_cObject) {
struct RClass *klass = RCLASS(cbase->nd_clss);
if (klass->iv_tbl &&
st_lookup(klass->iv_tbl, id, 0)) {
return Qtrue;
}
cbase = cbase->nd_next;
}
return rb_const_defined(cref->nd_clss, id);
}
static VALUE
ev_const_get(cref, id)
NODE *cref;
ID id;
{
NODE *cbase = cref;
VALUE result;
while (cbase && cbase->nd_clss != rb_cObject) {
struct RClass *klass = RCLASS(cbase->nd_clss);
if (klass->iv_tbl && st_lookup(klass->iv_tbl, id, &result)) {
return result;
}
cbase = cbase->nd_next;
}
return rb_const_get(cref->nd_clss, id);
}
static VALUE
ev_const_set(cref, id, val)
NODE *cref;
ID id;
VALUE val;
{
NODE *cbase = cref;
while (cbase && cbase->nd_clss != rb_cObject) {
struct RClass *klass = RCLASS(cbase->nd_clss);
if (klass->iv_tbl && st_lookup(klass->iv_tbl, id, 0)) {
st_insert(klass->iv_tbl, id, val);
return val;
}
cbase = cbase->nd_next;
}
rb_const_assign(cbase->nd_clss, id, val);
return val;
}
static VALUE
rb_mod_nesting()
{
NODE *cbase = RNODE(ruby_frame->cbase);
VALUE ary = rb_ary_new();
while (cbase && cbase->nd_clss != rb_cObject) {
rb_ary_push(ary, cbase->nd_clss);
cbase = cbase->nd_next;
}
return ary;
}
static VALUE
rb_mod_s_constants()
{
NODE *cbase = RNODE(ruby_frame->cbase);
VALUE ary = rb_ary_new();
while (cbase && cbase->nd_clss != rb_cObject) {
rb_mod_const_at(cbase->nd_clss, ary);
cbase = cbase->nd_next;
}
rb_mod_const_of(ruby_cbase, ary);
return ary;
}
void
rb_frozen_class_p(klass)
VALUE klass;
{
char *desc = "something(?!)";
if (OBJ_FROZEN(klass)) {
if (FL_TEST(klass, FL_SINGLETON))
desc = "object";
else {
switch (TYPE(klass)) {
case T_MODULE:
case T_ICLASS:
desc = "module"; break;
case T_CLASS:
desc = "class"; break;
}
}
rb_error_frozen(desc);
}
}
void
rb_undef(klass, id)
VALUE klass;
ID id;
{
VALUE origin;
NODE *body;
if (ruby_class == rb_cObject) {
rb_secure(4);
}
if (rb_safe_level() >= 4 && !OBJ_TAINTED(klass)) {
rb_raise(rb_eSecurityError, "Insecure: can't undef");
}
rb_frozen_class_p(klass);
if (id == __id__ || id == __send__) {
rb_warn("undefining `%s' may cause serious problem",
rb_id2name(id));
}
body = search_method(ruby_class, id, &origin);
if (!body || !body->nd_body) {
char *s0 = " class";
VALUE c = klass;
if (FL_TEST(c, FL_SINGLETON)) {
VALUE obj = rb_iv_get(klass, "__attached__");
switch (TYPE(obj)) {
case T_MODULE:
case T_CLASS:
c = obj;
s0 = "";
}
}
else if (TYPE(c) == T_MODULE) {
s0 = " module";
}
rb_raise(rb_eNameError, "undefined method `%s' for%s `%s'",
rb_id2name(id),s0,rb_class2name(c));
}
rb_add_method(klass, id, 0, NOEX_PUBLIC);
rb_clear_cache_by_id(id);
}
static VALUE
rb_mod_undef_method(mod, name)
VALUE mod, name;
{
rb_undef(mod, rb_to_id(name));
return mod;
}
void
rb_alias(klass, name, def)
VALUE klass;
ID name, def;
{
VALUE origin;
NODE *orig, *body;
rb_frozen_class_p(klass);
if (name == def) return;
if (klass == rb_cObject) {
rb_secure(4);
}
orig = search_method(klass, def, &origin);
if (!orig || !orig->nd_body) {
if (TYPE(klass) == T_MODULE) {
orig = search_method(rb_cObject, def, &origin);
}
}
if (!orig || !orig->nd_body) {
print_undef(klass, def);
}
body = orig->nd_body;
orig->nd_cnt++;
if (nd_type(body) == NODE_FBODY) { /* was alias */
def = body->nd_mid;
origin = body->nd_orig;
body = body->nd_head;
}
st_insert(RCLASS(klass)->m_tbl, name,
NEW_METHOD(NEW_FBODY(body, def, origin), orig->nd_noex));
rb_clear_cache_by_id(name);
}
static VALUE
rb_mod_alias_method(mod, newname, oldname)
VALUE mod, newname, oldname;
{
rb_alias(mod, rb_to_id(newname), rb_to_id(oldname));
return mod;
}
#ifdef C_ALLOCA
# define TMP_PROTECT NODE * volatile tmp__protect_tmp=0
# define TMP_ALLOC(n) \
(tmp__protect_tmp = rb_node_newnode(NODE_ALLOCA, \
ALLOC_N(VALUE,n),tmp__protect_tmp,n), \
(void*)tmp__protect_tmp->nd_head)
# define TMP_PROTECT_END do {\
if (tmp__protect_tmp) {\
rb_gc_force_recycle((VALUE)tmp__protect_tmp);\
alloca(0);\
}\
} while (0)
#else
# define TMP_PROTECT typedef int foobazzz
# define TMP_ALLOC(n) ALLOCA_N(VALUE,n)
# define TMP_PROTECT_END
#endif
#define SETUP_ARGS(anode) {\
NODE *n = anode;\
if (!n) {\
argc = 0;\
argv = 0;\
}\
else if (nd_type(n) == NODE_ARRAY) {\
argc=n->nd_alen;\
if (argc > 0) {\
char *file = ruby_sourcefile;\
int line = ruby_sourceline;\
int i;\
n = anode;\
argv = TMP_ALLOC(argc);\
for (i=0;i<argc;i++) {\
argv[i] = rb_eval(self,n->nd_head);\
n=n->nd_next;\
}\
ruby_sourcefile = file;\
ruby_sourceline = line;\
}\
else {\
argc = 0;\
argv = 0;\
}\
}\
else {\
VALUE args = rb_eval(self,n);\
char *file = ruby_sourcefile;\
int line = ruby_sourceline;\
if (TYPE(args) != T_ARRAY)\
args = rb_Array(args);\
argc = RARRAY(args)->len;\
argv = ALLOCA_N(VALUE, argc);\
MEMCPY(argv, RARRAY(args)->ptr, VALUE, argc);\
ruby_sourcefile = file;\
ruby_sourceline = line;\
}\
}
#define BEGIN_CALLARGS {\
struct BLOCK *tmp_block = ruby_block;\
if (ruby_iter->iter == ITER_PRE) {\
ruby_block = ruby_block->prev;\
}\
PUSH_ITER(ITER_NOT);
#define END_CALLARGS \
ruby_block = tmp_block;\
POP_ITER();\
}
#define MATCH_DATA ruby_scope->local_vars[node->nd_cnt]
static char* is_defined _((VALUE, NODE*, char*));
static char*
arg_defined(self, node, buf, type)
VALUE self;
NODE *node;
char *buf;
char *type;
{
int argc;
int i;
if (!node) return type; /* no args */
if (nd_type(node) == NODE_ARRAY) {
argc=node->nd_alen;
if (argc > 0) {
for (i=0;i<argc;i++) {
if (!is_defined(self, node->nd_head, buf))
return 0;
node = node->nd_next;
}
}
}
else if (!is_defined(self, node, buf)) {
return 0;
}
return type;
}
static char*
is_defined(self, node, buf)
VALUE self;
NODE *node; /* OK */
char *buf;
{
VALUE val; /* OK */
int state;
switch (nd_type(node)) {
case NODE_SUPER:
case NODE_ZSUPER:
if (ruby_frame->last_func == 0) return 0;
else if (ruby_frame->last_class == 0) return 0;
else if (rb_method_boundp(RCLASS(ruby_frame->last_class)->super,
ruby_frame->last_func, 0)) {
if (nd_type(node) == NODE_SUPER) {
return arg_defined(self, node->nd_args, buf, "super");
}
return "super";
}
break;
case NODE_VCALL:
case NODE_FCALL:
val = CLASS_OF(self);
goto check_bound;
case NODE_CALL:
if (!is_defined(self, node->nd_recv, buf)) return 0;
PUSH_TAG(PROT_NONE);
if ((state = EXEC_TAG()) == 0) {
val = rb_eval(self, node->nd_recv);
val = CLASS_OF(val);
}
POP_TAG();
if (state) {
ruby_errinfo = Qnil;
return 0;
}
check_bound:
if (rb_method_boundp(val, node->nd_mid, nd_type(node)== NODE_CALL)) {
return arg_defined(self, node->nd_args, buf, "method");
}
break;
case NODE_MATCH2:
case NODE_MATCH3:
return "method";
case NODE_YIELD:
if (rb_block_given_p()) {
return "yield";
}
break;
case NODE_SELF:
return "self";
case NODE_NIL:
return "nil";
case NODE_TRUE:
return "true";
case NODE_FALSE:
return "false";
case NODE_ATTRSET:
case NODE_OP_ASGN1:
case NODE_OP_ASGN2:
case NODE_MASGN:
case NODE_LASGN:
case NODE_DASGN:
case NODE_DASGN_CURR:
case NODE_GASGN:
case NODE_CDECL:
case NODE_CVDECL:
case NODE_CVASGN:
return "assignment";
case NODE_LVAR:
return "local-variable";
case NODE_DVAR:
return "local-variable(in-block)";
case NODE_GVAR:
if (rb_gvar_defined(node->nd_entry)) {
return "global-variable";
}
break;
case NODE_IVAR:
if (rb_ivar_defined(self, node->nd_vid)) {
return "instance-variable";
}
break;
case NODE_CONST:
if (ev_const_defined(RNODE(ruby_frame->cbase), node->nd_vid)) {
return "constant";
}
break;
case NODE_CVAR:
if (!FL_TEST(ruby_cbase, FL_SINGLETON)) {
if (rb_cvar_defined(ruby_cbase, node->nd_vid)) {
return "class variable";
}
break;
}
self = rb_iv_get(ruby_cbase, "__attached__");
/* fall through */
case NODE_CVAR2:
if (rb_cvar_defined(rb_cvar_singleton(self), node->nd_vid)) {
return "class variable";
}
break;
case NODE_COLON2:
PUSH_TAG(PROT_NONE);
if ((state = EXEC_TAG()) == 0) {
val = rb_eval(self, node->nd_head);
}
POP_TAG();
if (state) {
ruby_errinfo = Qnil;
return 0;
}
else {
switch (TYPE(val)) {
case T_CLASS:
case T_MODULE:
if (rb_const_defined_at(val, node->nd_mid))
return "constant";
default:
if (rb_method_boundp(val, node->nd_mid, 1)) {
return "method";
}
}
}
break;
case NODE_NTH_REF:
if (rb_reg_nth_defined(node->nd_nth, MATCH_DATA)) {
sprintf(buf, "$%d", node->nd_nth);
return buf;
}
break;
case NODE_BACK_REF:
if (rb_reg_nth_defined(0, MATCH_DATA)) {
sprintf(buf, "$%c", node->nd_nth);
return buf;
}
break;
default:
PUSH_TAG(PROT_NONE);
if ((state = EXEC_TAG()) == 0) {
rb_eval(self, node);
}
POP_TAG();
if (!state) {
return "expression";
}
ruby_errinfo = Qnil;
break;
}
return 0;
}
static int handle_rescue _((VALUE,NODE*));
static void blk_free();
static VALUE
rb_obj_is_block(block)
VALUE block;
{
if (TYPE(block) == T_DATA && RDATA(block)->dfree == (RUBY_DATA_FUNC)blk_free) {
return Qtrue;
}
return Qfalse;
}
static VALUE
rb_obj_is_proc(proc)
VALUE proc;
{
if (rb_obj_is_block(proc) && rb_obj_is_kind_of(proc, rb_cProc)) {
return Qtrue;
}
return Qfalse;
}
static VALUE
set_trace_func(obj, trace)
VALUE obj, trace;
{
if (NIL_P(trace)) {
trace_func = 0;
return Qnil;
}
if (!rb_obj_is_proc(trace)) {
rb_raise(rb_eTypeError, "trace_func needs to be Proc");
}
return trace_func = trace;
}
static void
call_trace_func(event, file, line, self, id, klass)
char *event;
char *file;
int line;
VALUE self;
ID id;
VALUE klass; /* OK */
{
int state;
struct FRAME *prev;
char *file_save = ruby_sourcefile;
int line_save = ruby_sourceline;
VALUE srcfile;
if (!trace_func) return;
if (tracing) return;
tracing = 1;
prev = ruby_frame;
PUSH_FRAME();
*ruby_frame = *prev;
ruby_frame->prev = prev;
ruby_frame->iter = 0; /* blocks not available anyway */
if (file) {
ruby_frame->line = ruby_sourceline = line;
ruby_frame->file = ruby_sourcefile = file;
}
if (klass) {
if (TYPE(klass) == T_ICLASS) {
klass = RBASIC(klass)->klass;
}
else if (FL_TEST(klass, FL_SINGLETON)) {
klass = self;
}
}
PUSH_TAG(PROT_NONE);
if ((state = EXEC_TAG()) == 0) {
srcfile = rb_str_new2(ruby_sourcefile?ruby_sourcefile:"(ruby)");
proc_call(trace_func, rb_ary_new3(6, rb_str_new2(event),
srcfile,
INT2FIX(ruby_sourceline),
id?ID2SYM(id):Qnil,
self?rb_f_binding(self):Qnil,
klass));
}
POP_TMPTAG(); /* do not propagate retval */
POP_FRAME();
tracing = 0;
ruby_sourceline = line_save;
ruby_sourcefile = file_save;
if (state) JUMP_TAG(state);
}
static void return_check _((void));
#define return_value(v) prot_tag->retval = (v)
static VALUE
rb_eval(self, n)
VALUE self;
NODE *n;
{
NODE * volatile node = n;
int state;
volatile VALUE result = Qnil;
#define RETURN(v) { result = (v); goto finish; }
again:
if (!node) RETURN(Qnil);
switch (nd_type(node)) {
case NODE_BLOCK:
while (node->nd_next) {
rb_eval(self, node->nd_head);
node = node->nd_next;
}
node = node->nd_head;
goto again;
case NODE_POSTEXE:
rb_f_END();
nd_set_type(node, NODE_NIL); /* exec just once */
result = Qnil;
break;
/* begin .. end without clauses */
case NODE_BEGIN:
node = node->nd_body;
goto again;
/* nodes for speed-up(default match) */
case NODE_MATCH:
result = rb_reg_match2(node->nd_head->nd_lit);
break;
/* nodes for speed-up(literal match) */
case NODE_MATCH2:
result = rb_reg_match(rb_eval(self,node->nd_recv),
rb_eval(self,node->nd_value));
break;
/* nodes for speed-up(literal match) */
case NODE_MATCH3:
{
VALUE r = rb_eval(self,node->nd_recv);
VALUE l = rb_eval(self,node->nd_value);
if (TYPE(r) == T_STRING) {
result = rb_reg_match(l, r);
}
else {
result = rb_funcall(r, match, 1, l);
}
}
break;
/* node for speed-up(top-level loop for -n/-p) */
case NODE_OPT_N:
PUSH_TAG(PROT_NONE);
switch (state = EXEC_TAG()) {
case 0:
opt_n_next:
while (!NIL_P(rb_gets())) {
opt_n_redo:
rb_eval(self, node->nd_body);
}
break;
case TAG_REDO:
state = 0;
goto opt_n_redo;
case TAG_NEXT:
state = 0;
goto opt_n_next;
case TAG_BREAK:
state = 0;
default:
break;
}
POP_TAG();
if (state) JUMP_TAG(state);
RETURN(Qnil);
case NODE_SELF:
RETURN(self);
case NODE_NIL:
RETURN(Qnil);
case NODE_TRUE:
RETURN(Qtrue);
case NODE_FALSE:
RETURN(Qfalse);
case NODE_IF:
ruby_sourceline = nd_line(node);
if (RTEST(rb_eval(self, node->nd_cond))) {
node = node->nd_body;
}
else {
node = node->nd_else;
}
goto again;
case NODE_WHEN:
while (node) {
NODE *tag;
if (nd_type(node) != NODE_WHEN) goto again;
tag = node->nd_head;
while (tag) {
if (trace_func) {
call_trace_func("line", tag->nd_file, nd_line(tag), self,
ruby_frame->last_func,
ruby_frame->last_class);
}
ruby_sourcefile = tag->nd_file;
ruby_sourceline = nd_line(tag);
if (nd_type(tag->nd_head) == NODE_WHEN) {
VALUE v = rb_eval(self, tag->nd_head->nd_head);
int i;
if (TYPE(v) != T_ARRAY) v = rb_Array(v);
for (i=0; i<RARRAY(v)->len; i++) {
if (RTEST(RARRAY(v)->ptr[i])) {
node = node->nd_body;
goto again;
}
}
tag = tag->nd_next;
continue;
}
if (RTEST(rb_eval(self, tag->nd_head))) {
node = node->nd_body;
goto again;
}
tag = tag->nd_next;
}
node = node->nd_next;
}
RETURN(Qnil);
case NODE_CASE:
{
VALUE val;
val = rb_eval(self, node->nd_head);
node = node->nd_body;
while (node) {
NODE *tag;
if (nd_type(node) != NODE_WHEN) {
goto again;
}
tag = node->nd_head;
while (tag) {
if (trace_func) {
call_trace_func("line", tag->nd_file, nd_line(tag), self,
ruby_frame->last_func,
ruby_frame->last_class);
}
ruby_sourcefile = tag->nd_file;
ruby_sourceline = nd_line(tag);
if (nd_type(tag->nd_head) == NODE_WHEN) {
VALUE v = rb_eval(self, tag->nd_head->nd_head);
int i;
if (TYPE(v) != T_ARRAY) v = rb_Array(v);
for (i=0; i<RARRAY(v)->len; i++) {
if (RTEST(rb_funcall2(RARRAY(v)->ptr[i], eqq, 1, &val))){
node = node->nd_body;
goto again;
}
}
tag = tag->nd_next;
continue;
}
if (RTEST(rb_funcall2(rb_eval(self, tag->nd_head), eqq, 1, &val))) {
node = node->nd_body;
goto again;
}
tag = tag->nd_next;
}
node = node->nd_next;
}
}
RETURN(Qnil);
case NODE_WHILE:
PUSH_TAG(PROT_NONE);
switch (state = EXEC_TAG()) {
case 0:
ruby_sourceline = nd_line(node);
if (node->nd_state && !RTEST(rb_eval(self, node->nd_cond)))
goto while_out;
do {
while_redo:
rb_eval(self, node->nd_body);
while_next:
;
} while (RTEST(rb_eval(self, node->nd_cond)));
break;
case TAG_REDO:
state = 0;
goto while_redo;
case TAG_NEXT:
state = 0;
goto while_next;
case TAG_BREAK:
state = 0;
default:
break;
}
while_out:
POP_TAG();
if (state) JUMP_TAG(state);
RETURN(Qnil);
case NODE_UNTIL:
PUSH_TAG(PROT_NONE);
switch (state = EXEC_TAG()) {
case 0:
if (node->nd_state && RTEST(rb_eval(self, node->nd_cond)))
goto until_out;
do {
until_redo:
rb_eval(self, node->nd_body);
until_next:
;
} while (!RTEST(rb_eval(self, node->nd_cond)));
break;
case TAG_REDO:
state = 0;
goto until_redo;
case TAG_NEXT:
state = 0;
goto until_next;
case TAG_BREAK:
state = 0;
default:
break;
}
until_out:
POP_TAG();
if (state) JUMP_TAG(state);
RETURN(Qnil);
case NODE_BLOCK_PASS:
result = block_pass(self, node);
break;
case NODE_ITER:
case NODE_FOR:
{
iter_retry:
PUSH_BLOCK(node->nd_var, node->nd_body);
PUSH_TAG(PROT_FUNC);
state = EXEC_TAG();
if (state == 0) {
if (nd_type(node) == NODE_ITER) {
PUSH_ITER(ITER_PRE);
result = rb_eval(self, node->nd_iter);
POP_ITER();
}
else {
VALUE recv;
char *file = ruby_sourcefile;
int line = ruby_sourceline;
_block.flags &= ~BLOCK_D_SCOPE;
recv = rb_eval(self, node->nd_iter);
PUSH_ITER(ITER_PRE);
ruby_sourcefile = file;
ruby_sourceline = line;
result = rb_call(CLASS_OF(recv),recv,each,0,0,0);
POP_ITER();
}
}
else if (_block.tag->dst == state) {
state &= TAG_MASK;
if (state == TAG_RETURN) {
result = prot_tag->retval;
}
}
POP_TAG();
POP_BLOCK();
switch (state) {
case 0:
break;
case TAG_RETRY:
goto iter_retry;
case TAG_BREAK:
result = Qnil;
break;
case TAG_RETURN:
return_value(result);
/* fall through */
default:
JUMP_TAG(state);
}
}
break;
case NODE_BREAK:
JUMP_TAG(TAG_BREAK);
break;
case NODE_NEXT:
JUMP_TAG(TAG_NEXT);
break;
case NODE_REDO:
JUMP_TAG(TAG_REDO);
break;
case NODE_RETRY:
JUMP_TAG(TAG_RETRY);
break;
case NODE_RESTARGS:
result = rb_eval(self, node->nd_head);
if (TYPE(result) != T_ARRAY) {
result = rb_Array(result);
}
break;
case NODE_YIELD:
if (node->nd_stts) {
result = rb_eval(self, node->nd_stts);
if (nd_type(node->nd_stts) == NODE_RESTARGS &&
RARRAY(result)->len == 1)
{
result = RARRAY(result)->ptr[0];
}
}
else {
result = Qnil;
}
result = rb_yield_0(result, 0, 0, 0);
break;
case NODE_RESCUE:
retry_entry:
{
volatile VALUE e_info = ruby_errinfo;
PUSH_TAG(PROT_NONE);
if ((state = EXEC_TAG()) == 0) {
result = rb_eval(self, node->nd_head);
}
POP_TAG();
if (state == TAG_RAISE) {
NODE * volatile resq = node->nd_resq;
ruby_sourceline = nd_line(node);
while (resq) {
if (handle_rescue(self, resq)) {
state = 0;
PUSH_TAG(PROT_NONE);
if ((state = EXEC_TAG()) == 0) {
result = rb_eval(self, resq->nd_body);
}
POP_TAG();
if (state == TAG_RETRY) {
state = 0;
ruby_errinfo = Qnil;
goto retry_entry;
}
if (state != TAG_RAISE) {
ruby_errinfo = e_info;
}
break;
}
resq = resq->nd_head; /* next rescue */
}
}
else if (node->nd_else) { /* else clause given */
if (!state) { /* no exception raised */
result = rb_eval(self, node->nd_else);
}
}
if (state) JUMP_TAG(state);
}
break;
case NODE_ENSURE:
PUSH_TAG(PROT_NONE);
if ((state = EXEC_TAG()) == 0) {
result = rb_eval(self, node->nd_head);
}
POP_TAG();
if (node->nd_ensr) {
VALUE retval = prot_tag->retval; /* save retval */
rb_eval(self, node->nd_ensr);
return_value(retval);
}
if (state) JUMP_TAG(state);
break;
case NODE_AND:
result = rb_eval(self, node->nd_1st);
if (!RTEST(result)) break;
node = node->nd_2nd;
goto again;
case NODE_OR:
result = rb_eval(self, node->nd_1st);
if (RTEST(result)) break;
node = node->nd_2nd;
goto again;
case NODE_NOT:
if (RTEST(rb_eval(self, node->nd_body))) result = Qfalse;
else result = Qtrue;
break;
case NODE_DOT2:
case NODE_DOT3:
result = rb_range_new(rb_eval(self, node->nd_beg),
rb_eval(self, node->nd_end),
nd_type(node) == NODE_DOT3);
if (node->nd_state) break;
if (nd_type(node->nd_beg) == NODE_LIT && FIXNUM_P(node->nd_beg->nd_lit) &&
nd_type(node->nd_end) == NODE_LIT && FIXNUM_P(node->nd_end->nd_lit))
{
nd_set_type(node, NODE_LIT);
node->nd_lit = result;
}
else {
node->nd_state = 1;
}
break;
case NODE_FLIP2: /* like AWK */
if (ruby_scope->local_vars == 0) {
rb_bug("unexpected local variable");
}
if (!RTEST(ruby_scope->local_vars[node->nd_cnt])) {
if (RTEST(rb_eval(self, node->nd_beg))) {
ruby_scope->local_vars[node->nd_cnt] =
RTEST(rb_eval(self, node->nd_end))?Qfalse:Qtrue;
result = Qtrue;
}
else {
result = Qfalse;
}
}
else {
if (RTEST(rb_eval(self, node->nd_end))) {
ruby_scope->local_vars[node->nd_cnt] = Qfalse;
}
result = Qtrue;
}
break;
case NODE_FLIP3: /* like SED */
if (ruby_scope->local_vars == 0) {
rb_bug("unexpected local variable");
}
if (!RTEST(ruby_scope->local_vars[node->nd_cnt])) {
result = RTEST(rb_eval(self, node->nd_beg)) ? Qtrue : Qfalse;
ruby_scope->local_vars[node->nd_cnt] = result;
}
else {
if (RTEST(rb_eval(self, node->nd_end))) {
ruby_scope->local_vars[node->nd_cnt] = Qfalse;
}
result = Qtrue;
}
break;
case NODE_RETURN:
if (node->nd_stts) {
return_value(rb_eval(self, node->nd_stts));
}
else {
return_value(Qnil);
}
return_check();
JUMP_TAG(TAG_RETURN);
break;
case NODE_ARGSCAT:
result = rb_ary_concat(rb_eval(self, node->nd_head),
rb_eval(self, node->nd_body));
break;
case NODE_ARGSPUSH:
result = rb_ary_push(rb_obj_dup(rb_eval(self, node->nd_head)),
rb_eval(self, node->nd_body));
break;
case NODE_CALL:
{
VALUE recv;
int argc; VALUE *argv; /* used in SETUP_ARGS */
TMP_PROTECT;
BEGIN_CALLARGS;
recv = rb_eval(self, node->nd_recv);
SETUP_ARGS(node->nd_args);
END_CALLARGS;
result = rb_call(CLASS_OF(recv),recv,node->nd_mid,argc,argv,0);
TMP_PROTECT_END;
}
break;
case NODE_FCALL:
{
int argc; VALUE *argv; /* used in SETUP_ARGS */
TMP_PROTECT;
BEGIN_CALLARGS;
SETUP_ARGS(node->nd_args);
END_CALLARGS;
result = rb_call(CLASS_OF(self),self,node->nd_mid,argc,argv,1);
TMP_PROTECT_END;
}
break;
case NODE_VCALL:
result = rb_call(CLASS_OF(self),self,node->nd_mid,0,0,2);
break;
case NODE_SUPER:
case NODE_ZSUPER:
{
int argc; VALUE *argv; /* used in SETUP_ARGS */
TMP_PROTECT;
if (ruby_frame->last_class == 0) {
rb_raise(rb_eNameError, "superclass method `%s' disabled",
rb_id2name(ruby_frame->last_func));
}
if (nd_type(node) == NODE_ZSUPER) {
argc = ruby_frame->argc;
argv = ruby_frame->argv;
}
else {
BEGIN_CALLARGS;
SETUP_ARGS(node->nd_args);
END_CALLARGS;
}
PUSH_ITER(ruby_iter->iter?ITER_PRE:ITER_NOT);
result = rb_call(RCLASS(ruby_frame->last_class)->super,
ruby_frame->self, ruby_frame->last_func,
argc, argv, 3);
POP_ITER();
TMP_PROTECT_END;
}
break;
case NODE_SCOPE:
{
struct FRAME frame;
frame = *ruby_frame;
frame.tmp = ruby_frame;
ruby_frame = &frame;
PUSH_SCOPE();
PUSH_TAG(PROT_NONE);
if (node->nd_rval) ruby_frame->cbase = node->nd_rval;
if (node->nd_tbl) {
VALUE *vars = ALLOCA_N(VALUE, node->nd_tbl[0]+1);
*vars++ = (VALUE)node;
ruby_scope->local_vars = vars;
rb_mem_clear(ruby_scope->local_vars, node->nd_tbl[0]);
ruby_scope->local_tbl = node->nd_tbl;
}
else {
ruby_scope->local_vars = 0;
ruby_scope->local_tbl = 0;
}
if ((state = EXEC_TAG()) == 0) {
result = rb_eval(self, node->nd_next);
}
POP_TAG();
POP_SCOPE();
ruby_frame = frame.tmp;
if (state) JUMP_TAG(state);
}
break;
case NODE_OP_ASGN1:
{
int argc; VALUE *argv; /* used in SETUP_ARGS */
VALUE recv, val;
NODE *rval;
TMP_PROTECT;
recv = rb_eval(self, node->nd_recv);
rval = node->nd_args->nd_head;
SETUP_ARGS(node->nd_args->nd_next);
val = rb_funcall2(recv, aref, argc-1, argv);
switch (node->nd_mid) {
case 0: /* OR */
if (RTEST(val)) RETURN(val);
val = rb_eval(self, rval);
break;
case 1: /* AND */
if (!RTEST(val)) RETURN(val);
val = rb_eval(self, rval);
break;
default:
val = rb_funcall(val, node->nd_mid, 1, rb_eval(self, rval));
}
argv[argc-1] = val;
val = rb_funcall2(recv, aset, argc, argv);
result = val;
TMP_PROTECT_END;
}
break;
case NODE_OP_ASGN2:
{
ID id = node->nd_next->nd_vid;
VALUE recv, val;
recv = rb_eval(self, node->nd_recv);
val = rb_funcall(recv, id, 0);
switch (node->nd_next->nd_mid) {
case 0: /* OR */
if (RTEST(val)) RETURN(val);
val = rb_eval(self, node->nd_value);
break;
case 1: /* AND */
if (!RTEST(val)) RETURN(val);
val = rb_eval(self, node->nd_value);
break;
default:
val = rb_funcall(val, node->nd_next->nd_mid, 1,
rb_eval(self, node->nd_value));
}
rb_funcall2(recv, node->nd_next->nd_aid, 1, &val);
result = val;
}
break;
case NODE_OP_ASGN_AND:
result = rb_eval(self, node->nd_head);
if (!RTEST(result)) break;
node = node->nd_value;
goto again;
case NODE_OP_ASGN_OR:
result = rb_eval(self, node->nd_head);
if (RTEST(result)) break;
node = node->nd_value;
goto again;
case NODE_MASGN:
result = massign(self, node, rb_eval(self, node->nd_value),0);
break;
case NODE_LASGN:
if (ruby_scope->local_vars == 0)
rb_bug("unexpected local variable assignment");
result = rb_eval(self, node->nd_value);
ruby_scope->local_vars[node->nd_cnt] = result;
break;
case NODE_DASGN:
result = rb_eval(self, node->nd_value);
dvar_asgn(node->nd_vid, result);
break;
case NODE_DASGN_CURR:
result = rb_eval(self, node->nd_value);
dvar_asgn_curr(node->nd_vid, result);
break;
case NODE_GASGN:
result = rb_eval(self, node->nd_value);
rb_gvar_set(node->nd_entry, result);
break;
case NODE_IASGN:
result = rb_eval(self, node->nd_value);
rb_ivar_set(self, node->nd_vid, result);
break;
case NODE_CDECL:
if (NIL_P(ruby_class)) {
rb_raise(rb_eTypeError, "no class/module to define constant");
}
result = rb_eval(self, node->nd_value);
rb_const_set(ruby_class, node->nd_vid, result);
break;
case NODE_CVDECL:
if (NIL_P(ruby_cbase)) {
rb_raise(rb_eTypeError, "no class/module to define class variable");
}
result = rb_eval(self, node->nd_value);
if (FL_TEST(ruby_cbase, FL_SINGLETON)) {
rb_cvar_declare(rb_cvar_singleton(rb_iv_get(ruby_cbase, "__attached__")),
node->nd_vid, result);
break;
}
rb_cvar_declare(ruby_cbase, node->nd_vid, result);
break;
case NODE_CVASGN:
result = rb_eval(self, node->nd_value);
rb_cvar_set(rb_cvar_singleton(self), node->nd_vid, result);
break;
case NODE_LVAR:
if (ruby_scope->local_vars == 0) {
rb_bug("unexpected local variable");
}
result = ruby_scope->local_vars[node->nd_cnt];
break;
case NODE_DVAR:
result = rb_dvar_ref(node->nd_vid);
break;
case NODE_GVAR:
result = rb_gvar_get(node->nd_entry);
break;
case NODE_IVAR:
result = rb_ivar_get(self, node->nd_vid);
break;
case NODE_CONST:
result = ev_const_get(RNODE(ruby_frame->cbase), node->nd_vid);
break;
case NODE_CVAR: /* normal method */
if (!FL_TEST(ruby_cbase, FL_SINGLETON)) {
result = rb_cvar_get(ruby_cbase, node->nd_vid);
break;
}
self = rb_iv_get(ruby_cbase, "__attached__");
/* fall through */
case NODE_CVAR2: /* singleton method */
result = rb_cvar_get(rb_cvar_singleton(self), node->nd_vid);
break;
case NODE_BLOCK_ARG:
if (ruby_scope->local_vars == 0)
rb_bug("unexpected block argument");
if (rb_block_given_p()) {
result = rb_f_lambda();
ruby_scope->local_vars[node->nd_cnt] = result;
}
else {
result = Qnil;
}
break;
case NODE_COLON2:
{
VALUE klass;
klass = rb_eval(self, node->nd_head);
switch (TYPE(klass)) {
case T_CLASS:
case T_MODULE:
break;
default:
return rb_funcall(klass, node->nd_mid, 0, 0);
}
result = rb_const_get(klass, node->nd_mid);
}
break;
case NODE_COLON3:
result = rb_const_get_at(rb_cObject, node->nd_mid);
break;
case NODE_NTH_REF:
result = rb_reg_nth_match(node->nd_nth, MATCH_DATA);
break;
case NODE_BACK_REF:
switch (node->nd_nth) {
case '&':
result = rb_reg_last_match(MATCH_DATA);
break;
case '`':
result = rb_reg_match_pre(MATCH_DATA);
break;
case '\'':
result = rb_reg_match_post(MATCH_DATA);
break;
case '+':
result = rb_reg_match_last(MATCH_DATA);
break;
default:
rb_bug("unexpected back-ref");
}
break;
case NODE_HASH:
{
NODE *list;
VALUE hash = rb_hash_new();
VALUE key, val;
list = node->nd_head;
while (list) {
key = rb_eval(self, list->nd_head);
list = list->nd_next;
if (list == 0)
rb_bug("odd number list for Hash");
val = rb_eval(self, list->nd_head);
list = list->nd_next;
rb_hash_aset(hash, key, val);
}
result = hash;
}
break;
case NODE_ZARRAY: /* zero length list */
result = rb_ary_new();
break;
case NODE_ARRAY:
{
VALUE ary;
int i;
i = node->nd_alen;
ary = rb_ary_new2(i);
for (i=0;node;node=node->nd_next) {
RARRAY(ary)->ptr[i++] = rb_eval(self, node->nd_head);
RARRAY(ary)->len = i;
}
result = ary;
}
break;
case NODE_STR:
result = rb_str_new3(node->nd_lit);
break;
case NODE_DSTR:
case NODE_DXSTR:
case NODE_DREGX:
case NODE_DREGX_ONCE:
{
VALUE str, str2;
NODE *list = node->nd_next;
str = rb_str_new3(node->nd_lit);
while (list) {
if (list->nd_head) {
switch (nd_type(list->nd_head)) {
case NODE_STR:
str2 = list->nd_head->nd_lit;
break;
case NODE_EVSTR:
result = ruby_errinfo;
ruby_errinfo = Qnil;
ruby_sourceline = nd_line(node);
ruby_in_eval++;
list->nd_head = compile(list->nd_head->nd_lit,
ruby_sourcefile,
ruby_sourceline);
ruby_eval_tree = 0;
ruby_in_eval--;
if (ruby_nerrs > 0) {
compile_error("string expansion");
}
if (!NIL_P(result)) ruby_errinfo = result;
/* fall through */
default:
str2 = rb_obj_as_string(rb_eval(self, list->nd_head));
break;
}
rb_str_append(str, str2);
OBJ_INFECT(str, str2);
}
list = list->nd_next;
}
switch (nd_type(node)) {
case NODE_DREGX:
result = rb_reg_new(RSTRING(str)->ptr, RSTRING(str)->len,
node->nd_cflag);
break;
case NODE_DREGX_ONCE: /* regexp expand once */
result = rb_reg_new(RSTRING(str)->ptr, RSTRING(str)->len,
node->nd_cflag);
nd_set_type(node, NODE_LIT);
node->nd_lit = result;
break;
case NODE_DXSTR:
result = rb_funcall(self, '`', 1, str);
break;
default:
result = str;
break;
}
}
break;
case NODE_XSTR:
result = rb_funcall(self, '`', 1, node->nd_lit);
break;
case NODE_LIT:
result = node->nd_lit;
break;
case NODE_ATTRSET:
if (ruby_frame->argc != 1)
rb_raise(rb_eArgError, "wrong # of arguments(%d for 1)",
ruby_frame->argc);
result = rb_ivar_set(self, node->nd_vid, ruby_frame->argv[0]);
break;
case NODE_DEFN:
if (node->nd_defn) {
NODE *body;
VALUE origin;
int noex;
if (NIL_P(ruby_class)) {
rb_raise(rb_eTypeError, "no class to add method");
}
if (ruby_class == rb_cObject && node->nd_mid == init) {
rb_warn("redefining Object#initialize may cause infinite loop");
}
if (node->nd_mid == __id__ || node->nd_mid == __send__) {
rb_warn("redefining `%s' may cause serious problem",
rb_id2name(node->nd_mid));
}
rb_frozen_class_p(ruby_class);
body = search_method(ruby_class, node->nd_mid, &origin);
if (body){
if (RTEST(ruby_verbose) && ruby_class == origin && body->nd_cnt == 0) {
rb_warning("discarding old %s", rb_id2name(node->nd_mid));
}
if (node->nd_noex) { /* toplevel */
/* should upgrade to rb_warn() if no super was called inside? */
rb_warning("overriding global function `%s'",
rb_id2name(node->nd_mid));
}
}
if (SCOPE_TEST(SCOPE_PRIVATE) || node->nd_mid == init) {
noex = NOEX_PRIVATE;
}
else if (SCOPE_TEST(SCOPE_PROTECTED)) {
noex = NOEX_PROTECTED;
}
else if (ruby_class == rb_cObject) {
noex = node->nd_noex;
}
else {
noex = NOEX_PUBLIC;
}
if (body && origin == ruby_class && body->nd_noex & NOEX_UNDEF) {
noex |= NOEX_UNDEF;
}
rb_add_method(ruby_class, node->nd_mid, node->nd_defn, noex);
rb_clear_cache_by_id(node->nd_mid);
if (scope_vmode == SCOPE_MODFUNC) {
rb_add_method(rb_singleton_class(ruby_class),
node->nd_mid, node->nd_defn, NOEX_PUBLIC);
rb_funcall(ruby_class, singleton_added, 1, ID2SYM(node->nd_mid));
}
if (FL_TEST(ruby_class, FL_SINGLETON)) {
rb_funcall(rb_iv_get(ruby_class, "__attached__"),
singleton_added, 1, ID2SYM(node->nd_mid));
}
else {
rb_funcall(ruby_class, added, 1, ID2SYM(node->nd_mid));
}
result = Qnil;
}
break;
case NODE_DEFS:
if (node->nd_defn) {
VALUE recv = rb_eval(self, node->nd_recv);
VALUE klass;
NODE *body = 0;
if (rb_safe_level() >= 4 && !OBJ_TAINTED(recv)) {
rb_raise(rb_eSecurityError, "Insecure; can't define singleton method");
}
if (FIXNUM_P(recv) || SYMBOL_P(recv)) {
rb_raise(rb_eTypeError,
"can't define singleton method \"%s\" for %s",
rb_id2name(node->nd_mid),
rb_class2name(CLASS_OF(recv)));
}
if (OBJ_FROZEN(recv)) rb_error_frozen("object");
klass = rb_singleton_class(recv);
if (st_lookup(RCLASS(klass)->m_tbl, node->nd_mid, &body)) {
if (rb_safe_level() >= 4) {
rb_raise(rb_eSecurityError, "redefining method prohibited");
}
if (RTEST(ruby_verbose)) {
rb_warning("redefine %s", rb_id2name(node->nd_mid));
}
}
rb_add_method(klass, node->nd_mid, node->nd_defn,
NOEX_PUBLIC|(body?body->nd_noex&NOEX_UNDEF:0));
rb_clear_cache_by_id(node->nd_mid);
rb_funcall(recv, singleton_added, 1, ID2SYM(node->nd_mid));
result = Qnil;
}
break;
case NODE_UNDEF:
if (NIL_P(ruby_class)) {
rb_raise(rb_eTypeError, "no class to undef method");
}
rb_undef(ruby_class, node->nd_mid);
result = Qnil;
break;
case NODE_ALIAS:
if (NIL_P(ruby_class)) {
rb_raise(rb_eTypeError, "no class to make alias");
}
rb_alias(ruby_class, node->nd_new, node->nd_old);
rb_funcall(ruby_class, added, 1, ID2SYM(node->nd_mid));
result = Qnil;
break;
case NODE_VALIAS:
rb_alias_variable(node->nd_new, node->nd_old);
result = Qnil;
break;
case NODE_CLASS:
{
VALUE super, klass, tmp;
if (NIL_P(ruby_class)) {
rb_raise(rb_eTypeError, "no outer class/module");
}
if (node->nd_super) {
super = superclass(self, node->nd_super);
}
else {
super = 0;
}
klass = 0;
if ((ruby_class == rb_cObject) && rb_autoload_defined(node->nd_cname)) {
rb_autoload_load(node->nd_cname);
}
if (rb_const_defined_at(ruby_class, node->nd_cname)) {
klass = rb_const_get(ruby_class, node->nd_cname);
}
if (klass) {
if (TYPE(klass) != T_CLASS) {
rb_raise(rb_eTypeError, "%s is not a class",
rb_id2name(node->nd_cname));
}
if (super) {
tmp = RCLASS(klass)->super;
if (FL_TEST(tmp, FL_SINGLETON)) {
tmp = RCLASS(tmp)->super;
}
while (TYPE(tmp) == T_ICLASS) {
tmp = RCLASS(tmp)->super;
}
if (tmp != super) {
super = tmp;
goto override_class;
}
}
if (rb_safe_level() >= 4) {
rb_raise(rb_eSecurityError, "extending class prohibited");
}
rb_clear_cache();
}
else {
override_class:
if (!super) super = rb_cObject;
klass = rb_define_class_id(node->nd_cname, super);
rb_const_set(ruby_class, node->nd_cname, klass);
rb_set_class_path(klass,ruby_class,rb_id2name(node->nd_cname));
}
if (ruby_wrapper) {
rb_extend_object(klass, ruby_wrapper);
rb_include_module(klass, ruby_wrapper);
}
result = module_setup(klass, node->nd_body);
}
break;
case NODE_MODULE:
{
VALUE module;
if (NIL_P(ruby_class)) {
rb_raise(rb_eTypeError, "no outer class/module");
}
module = 0;
if ((ruby_class == rb_cObject) && rb_autoload_defined(node->nd_cname)) {
rb_autoload_load(node->nd_cname);
}
if (rb_const_defined_at(ruby_class, node->nd_cname)) {
module = rb_const_get(ruby_class, node->nd_cname);
}
if (module) {
if (TYPE(module) != T_MODULE) {
rb_raise(rb_eTypeError, "%s is not a module",
rb_id2name(node->nd_cname));
}
if (rb_safe_level() >= 4) {
rb_raise(rb_eSecurityError, "extending module prohibited");
}
}
else {
module = rb_define_module_id(node->nd_cname);
rb_const_set(ruby_class, node->nd_cname, module);
rb_set_class_path(module,ruby_class,rb_id2name(node->nd_cname));
}
if (ruby_wrapper) {
rb_extend_object(module, ruby_wrapper);
rb_include_module(module, ruby_wrapper);
}
result = module_setup(module, node->nd_body);
}
break;
case NODE_SCLASS:
{
VALUE klass;
klass = rb_eval(self, node->nd_recv);
if (rb_special_const_p(klass)) {
rb_raise(rb_eTypeError, "no virtual class for %s",
rb_class2name(CLASS_OF(klass)));
}
if (rb_safe_level() >= 4 && !OBJ_TAINTED(klass))
rb_raise(rb_eSecurityError, "Insecure: can't extend object");
if (FL_TEST(CLASS_OF(klass), FL_SINGLETON)) {
rb_clear_cache();
}
klass = rb_singleton_class(klass);
if (ruby_wrapper) {
rb_extend_object(klass, ruby_wrapper);
rb_include_module(klass, ruby_wrapper);
}
result = module_setup(klass, node->nd_body);
}
break;
case NODE_DEFINED:
{
char buf[20];
char *desc = is_defined(self, node->nd_head, buf);
if (desc) result = rb_str_new2(desc);
else result = Qnil;
}
break;
case NODE_NEWLINE:
ruby_sourcefile = node->nd_file;
ruby_sourceline = node->nd_nth;
if (trace_func) {
call_trace_func("line", ruby_sourcefile, ruby_sourceline, self,
ruby_frame->last_func,
ruby_frame->last_class);
}
node = node->nd_next;
goto again;
default:
rb_bug("unknown node type %d", nd_type(node));
}
finish:
CHECK_INTS;
return result;
}
static VALUE
module_setup(module, n)
VALUE module;
NODE *n;
{
NODE * volatile node = n;
int state;
struct FRAME frame;
VALUE result; /* OK */
char *file = ruby_sourcefile;
int line = ruby_sourceline;
TMP_PROTECT;
frame = *ruby_frame;
frame.tmp = ruby_frame;
ruby_frame = &frame;
/* fill c-ref */
node->nd_clss = module;
node = node->nd_body;
PUSH_CLASS();
ruby_class = module;
PUSH_SCOPE();
PUSH_VARS();
if (node->nd_rval) ruby_frame->cbase = node->nd_rval;
if (node->nd_tbl) {
VALUE *vars = TMP_ALLOC(node->nd_tbl[0]+1);
*vars++ = (VALUE)node;
ruby_scope->local_vars = vars;
rb_mem_clear(ruby_scope->local_vars, node->nd_tbl[0]);
ruby_scope->local_tbl = node->nd_tbl;
}
else {
ruby_scope->local_vars = 0;
ruby_scope->local_tbl = 0;
}
PUSH_TAG(PROT_NONE);
if ((state = EXEC_TAG()) == 0) {
if (trace_func) {
call_trace_func("class", file, line, ruby_class,
ruby_frame->last_func,
ruby_frame->last_class);
}
result = rb_eval(ruby_class, node->nd_next);
}
POP_TAG();
POP_VARS();
POP_SCOPE();
POP_CLASS();
ruby_frame = frame.tmp;
if (trace_func) {
call_trace_func("end", file, line, 0,
ruby_frame->last_func, ruby_frame->last_class);
}
TMP_PROTECT_END;
if (state) JUMP_TAG(state);
return result;
}
int
rb_respond_to(obj, id)
VALUE obj;
ID id;
{
if (rb_method_boundp(CLASS_OF(obj), id, 0)) {
return Qtrue;
}
return Qfalse;
}
static VALUE
rb_obj_respond_to(argc, argv, obj)
int argc;
VALUE *argv;
VALUE obj;
{
VALUE mid, priv;
ID id;
rb_scan_args(argc, argv, "11", &mid, &priv);
id = rb_to_id(mid);
if (rb_method_boundp(CLASS_OF(obj), id, !RTEST(priv))) {
return Qtrue;
}
return Qfalse;
}
static VALUE
rb_mod_method_defined(mod, mid)
VALUE mod, mid;
{
if (rb_method_boundp(mod, rb_to_id(mid), 1)) {
return Qtrue;
}
return Qfalse;
}
void
rb_exit(status)
int status;
{
if (prot_tag) {
VALUE exit;
exit_status = status;
exit = rb_exc_new(rb_eSystemExit, 0, 0);
rb_iv_set(exit, "status", INT2NUM(status));
rb_exc_raise(exit);
}
ruby_finalize();
exit(status);
}
static VALUE
rb_f_exit(argc, argv, obj)
int argc;
VALUE *argv;
VALUE obj;
{
VALUE status;
int istatus;
rb_secure(4);
if (rb_scan_args(argc, argv, "01", &status) == 1) {
istatus = NUM2INT(status);
}
else {
istatus = 0;
}
rb_exit(istatus);
return Qnil; /* not reached */
}
static void
rb_abort()
{
if (!NIL_P(ruby_errinfo)) {
error_print();
}
rb_exit(1);
}
static VALUE
rb_f_abort()
{
rb_secure(4);
rb_abort();
return Qnil; /* not reached */
}
void
rb_iter_break()
{
JUMP_TAG(TAG_BREAK);
}
static void rb_longjmp _((int, VALUE)) NORETURN;
static VALUE make_backtrace _((void));
static void
rb_longjmp(tag, mesg)
int tag;
VALUE mesg;
{
VALUE at;
if (NIL_P(mesg)) mesg = ruby_errinfo;
if (NIL_P(mesg)) {
mesg = rb_exc_new(rb_eRuntimeError, 0, 0);
}
if (ruby_sourcefile && !NIL_P(mesg)) {
at = get_backtrace(mesg);
if (NIL_P(at)) {
at = make_backtrace();
set_backtrace(mesg, at);
}
}
if (!NIL_P(mesg)) {
ruby_errinfo = mesg;
}
if (RTEST(ruby_debug) && !NIL_P(ruby_errinfo)
&& !rb_obj_is_kind_of(ruby_errinfo, rb_eSystemExit)) {
fprintf(stderr, "Exception `%s' at %s:%d - %s\n",
rb_class2name(CLASS_OF(ruby_errinfo)),
ruby_sourcefile, ruby_sourceline,
STR2CSTR(ruby_errinfo));
}
rb_trap_restore_mask();
if (trace_func && tag != TAG_FATAL) {
call_trace_func("raise", ruby_sourcefile, ruby_sourceline,
ruby_frame->self,
ruby_frame->last_func,
ruby_frame->last_class);
}
if (!prot_tag) {
error_print();
}
JUMP_TAG(tag);
}
void
rb_exc_raise(mesg)
VALUE mesg;
{
rb_longjmp(TAG_RAISE, mesg);
}
void
rb_exc_fatal(mesg)
VALUE mesg;
{
rb_longjmp(TAG_FATAL, mesg);
}
void
rb_interrupt()
{
rb_raise(rb_eInterrupt, "");
}
static VALUE
rb_f_raise(argc, argv)
int argc;
VALUE *argv;
{
VALUE mesg;
ID exception;
int n;
mesg = Qnil;
switch (argc) {
case 0:
mesg = Qnil;
break;
case 1:
if (NIL_P(argv[0])) break;
if (TYPE(argv[0]) == T_STRING) {
mesg = rb_exc_new3(rb_eRuntimeError, argv[0]);
break;
}
n = 0;
goto exception_call;
case 2:
case 3:
n = 1;
exception_call:
exception = rb_intern("exception");
if (!rb_respond_to(argv[0], exception)) {
rb_raise(rb_eTypeError, "exception class/object expected");
}
mesg = rb_funcall(argv[0], exception, n, argv[1]);
break;
default:
rb_raise(rb_eArgError, "wrong # of arguments");
break;
}
if (argc > 0) {
if (!rb_obj_is_kind_of(mesg, rb_eException))
rb_raise(rb_eTypeError, "exception object expected");
set_backtrace(mesg, (argc>2)?argv[2]:Qnil);
}
if (ruby_frame != top_frame) {
PUSH_FRAME(); /* fake frame */
*ruby_frame = *_frame.prev->prev;
rb_longjmp(TAG_RAISE, mesg);
POP_FRAME();
}
rb_longjmp(TAG_RAISE, mesg);
return Qnil; /* not reached */
}
void
rb_jump_tag(tag)
int tag;
{
JUMP_TAG(tag);
}
int
rb_block_given_p()
{
if (ruby_frame->iter) return Qtrue;
return Qfalse;
}
int
rb_iterator_p()
{
return rb_block_given_p();
}
static VALUE
rb_f_block_given_p()
{
if (ruby_frame->prev && ruby_frame->prev->iter) return Qtrue;
return Qfalse;
}
static VALUE
rb_yield_0(val, self, klass, acheck)
VALUE val, self, klass; /* OK */
int acheck;
{
NODE *node;
volatile VALUE result = Qnil;
struct BLOCK *block;
struct SCOPE *old_scope;
struct FRAME frame;
int state;
static unsigned serial = 1;
if (!ruby_frame->iter || !ruby_block) {
rb_raise(rb_eLocalJumpError, "yield called out of block");
}
PUSH_VARS();
PUSH_CLASS();
block = ruby_block;
frame = block->frame;
frame.prev = ruby_frame;
ruby_frame = &(frame);
old_scope = ruby_scope;
ruby_scope = block->scope;
ruby_block = block->prev;
if (block->flags & BLOCK_D_SCOPE) {
/* put place holder for dynamic (in-block) local variables */
ruby_dyna_vars = new_dvar(0, 0, block->dyna_vars);
}
else {
/* FOR does not introduce new scope */
ruby_dyna_vars = block->dyna_vars;
}
ruby_class = klass?klass:block->klass;
if (!self) self = block->self;
node = block->body;
if (block->var) {
PUSH_TAG(PROT_NONE);
if ((state = EXEC_TAG()) == 0) {
if (block->var == (NODE*)1) {
if (acheck && val != Qundef &&
TYPE(val) == T_ARRAY && RARRAY(val)->len != 0) {
rb_raise(rb_eArgError, "wrong # of arguments (%d for 0)",
RARRAY(val)->len);
}
}
else {
if (nd_type(block->var) == NODE_MASGN)
massign(self, block->var, val, acheck);
else {
/* argument adjust for proc_call etc. */
if (acheck && val != Qundef &&
TYPE(val) == T_ARRAY && RARRAY(val)->len == 1) {
val = RARRAY(val)->ptr[0];
}
assign(self, block->var, val, acheck);
}
}
}
POP_TAG();
if (state) goto pop_state;
}
PUSH_ITER(block->iter);
PUSH_TAG(PROT_NONE);
if ((state = EXEC_TAG()) == 0) {
redo:
if (!node) {
result = Qnil;
}
else if (nd_type(node) == NODE_CFUNC) {
if (val == Qundef) val = rb_ary_new2(0);
result = (*node->nd_cfnc)(val, node->nd_tval, self);
}
else {
result = rb_eval(self, node);
}
}
else {
switch (state) {
case TAG_REDO:
state = 0;
CHECK_INTS;
goto redo;
case TAG_NEXT:
state = 0;
result = Qnil;
break;
case TAG_BREAK:
case TAG_RETURN:
state |= (serial++ << 8);
state |= 0x10;
block->tag->dst = state;
break;
default:
break;
}
}
POP_TAG();
pop_state:
POP_ITER();
POP_CLASS();
if ((block->flags & BLOCK_D_SCOPE) &&
!FL_TEST(ruby_dyna_vars, DVAR_DONT_RECYCLE)) {
struct RVarmap *vars = ruby_dyna_vars;
while (vars && vars->id != 0) {
struct RVarmap *tmp = vars->next;
rb_gc_force_recycle((VALUE)vars);
vars = tmp;
}
if (ruby_dyna_vars && ruby_dyna_vars->id == 0) {
rb_gc_force_recycle((VALUE)ruby_dyna_vars);
}
}
POP_VARS();
ruby_block = block;
ruby_frame = ruby_frame->prev;
if (ruby_scope->flag & SCOPE_DONT_RECYCLE)
scope_dup(old_scope);
ruby_scope = old_scope;
if (state) JUMP_TAG(state);
return result;
}
VALUE
rb_yield(val)
VALUE val;
{
return rb_yield_0(val, 0, 0, 0);
}
static VALUE
rb_f_loop()
{
for (;;) {
rb_yield_0(Qnil, 0, 0, 0);
CHECK_INTS;
}
return Qnil; /* dummy */
}
static VALUE
massign(self, node, val, check)
VALUE self;
NODE *node;
VALUE val;
int check;
{
NODE *list;
int i = 0, len;
if (val == Qundef) {
val = rb_ary_new2(0);
}
else if (TYPE(val) != T_ARRAY) {
if (rb_respond_to(val, to_ary)) {
VALUE ary = rb_funcall(val, to_ary, 0);
if (TYPE(ary) != T_ARRAY) {
rb_raise(rb_eTypeError, "%s#to_ary should return Array",
rb_class2name(CLASS_OF(val)));
}
val = ary;
}
else {
val = rb_ary_new3(1, val);
}
}
len = RARRAY(val)->len;
list = node->nd_head;
for (i=0; list && i<len; i++) {
assign(self, list->nd_head, RARRAY(val)->ptr[i], check);
list = list->nd_next;
}
if (check && list) goto arg_error;
if (node->nd_args) {
if (node->nd_args == (NODE*)-1) {
/* no check for mere `*' */
}
else if (!list && i<len) {
assign(self, node->nd_args, rb_ary_new4(len-i, RARRAY(val)->ptr+i), check);
}
else {
assign(self, node->nd_args, rb_ary_new2(0), check);
}
}
else if (check && i < len) {
goto arg_error;
}
while (list) {
i++;
assign(self, list->nd_head, Qnil, check);
list = list->nd_next;
}
return val;
arg_error:
while (list) {
i++;
list = list->nd_next;
}
rb_raise(rb_eArgError, "wrong # of arguments (%d for %d)", len, i);
}
static void
assign(self, lhs, val, check)
VALUE self;
NODE *lhs;
VALUE val;
int check;
{
if (val == Qundef) val = Qnil;
switch (nd_type(lhs)) {
case NODE_GASGN:
rb_gvar_set(lhs->nd_entry, val);
break;
case NODE_IASGN:
rb_ivar_set(self, lhs->nd_vid, val);
break;
case NODE_LASGN:
if (ruby_scope->local_vars == 0)
rb_bug("unexpected local variable assignment");
ruby_scope->local_vars[lhs->nd_cnt] = val;
break;
case NODE_DASGN:
dvar_asgn(lhs->nd_vid, val);
break;
case NODE_DASGN_CURR:
dvar_asgn_curr(lhs->nd_vid, val);
break;
case NODE_CDECL:
rb_const_set(ruby_class, lhs->nd_vid, val);
break;
case NODE_CVDECL:
if (!FL_TEST(ruby_cbase, FL_SINGLETON)) {
rb_cvar_declare(ruby_cbase, lhs->nd_vid, val);
break;
}
self = rb_iv_get(ruby_cbase, "__attached__");
/* fall through */
case NODE_CVASGN:
rb_cvar_set(rb_cvar_singleton(self), lhs->nd_vid, val);
break;
case NODE_MASGN:
massign(self, lhs, val, check);
break;
case NODE_CALL:
{
VALUE recv;
recv = rb_eval(self, lhs->nd_recv);
if (!lhs->nd_args) {
/* attr set */
rb_call(CLASS_OF(recv), recv, lhs->nd_mid, 1, &val, 0);
}
else {
/* array set */
VALUE args;
args = rb_eval(self, lhs->nd_args);
rb_ary_push(args, val);
rb_call(CLASS_OF(recv), recv, lhs->nd_mid,
RARRAY(args)->len, RARRAY(args)->ptr, 0);
}
}
break;
default:
rb_bug("bug in variable assignment");
break;
}
}
VALUE
rb_iterate(it_proc, data1, bl_proc, data2)
VALUE (*it_proc)(), (*bl_proc)();
VALUE data1, data2;
{
int state;
volatile VALUE retval = Qnil;
NODE *node = NEW_CFUNC(bl_proc, data2);
VALUE self = ruby_top_self;
iter_retry:
PUSH_ITER(ITER_PRE);
PUSH_BLOCK(0, node);
PUSH_TAG(PROT_NONE);
state = EXEC_TAG();
if (state == 0) {
retval = (*it_proc)(data1);
}
if (ruby_block->tag->dst == state) {
state &= TAG_MASK;
if (state == TAG_RETURN) {
retval = prot_tag->retval;
}
}
POP_TAG();
POP_BLOCK();
POP_ITER();
switch (state) {
case 0:
break;
case TAG_RETRY:
goto iter_retry;
case TAG_BREAK:
retval = Qnil;
break;
case TAG_RETURN:
return_value(retval);
/* fall through */
default:
JUMP_TAG(state);
}
return retval;
}
static int
handle_rescue(self, node)
VALUE self;
NODE *node;
{
int argc; VALUE *argv; /* used in SETUP_ARGS */
TMP_PROTECT;
if (!node->nd_args) {
return rb_obj_is_kind_of(ruby_errinfo, rb_eStandardError);
}
BEGIN_CALLARGS;
SETUP_ARGS(node->nd_args);
END_CALLARGS;
while (argc--) {
if (!rb_obj_is_kind_of(argv[0], rb_cModule)) {
rb_raise(rb_eTypeError, "class or module required for rescue clause");
}
if (rb_obj_is_kind_of(ruby_errinfo, argv[0])) return 1;
argv++;
}
TMP_PROTECT_END;
return 0;
}
VALUE
#ifdef HAVE_STDARG_PROTOTYPES
rb_rescue2(VALUE (*b_proc)(), VALUE data1, VALUE (*r_proc)(), VALUE data2, ...)
#else
rb_rescue2(b_proc, data1, r_proc, data2, va_alist)
VALUE (*b_proc)(), (*r_proc)();
VALUE data1, data2;
va_dcl
#endif
{
int state;
volatile VALUE result;
volatile VALUE e_info = ruby_errinfo;
va_list args;
PUSH_TAG(PROT_NONE);
if ((state = EXEC_TAG()) == 0) {
retry_entry:
result = (*b_proc)(data1);
}
else if (state == TAG_RAISE) {
int handle = Qfalse;
VALUE eclass;
va_init_list(args, data2);
while (eclass = va_arg(args, VALUE)) {
if (rb_obj_is_kind_of(ruby_errinfo, eclass)) {
handle = Qtrue;
break;
}
}
va_end(args);
if (handle) {
if (r_proc) {
PUSH_TAG(PROT_NONE);
if ((state = EXEC_TAG()) == 0) {
result = (*r_proc)(data2, ruby_errinfo);
}
POP_TAG();
if (state == TAG_RETRY) {
state = 0;
ruby_errinfo = Qnil;
goto retry_entry;
}
}
else {
result = Qnil;
state = 0;
}
if (state == 0) {
ruby_errinfo = e_info;
}
}
}
POP_TAG();
if (state) JUMP_TAG(state);
return result;
}
VALUE
rb_rescue(b_proc, data1, r_proc, data2)
VALUE (*b_proc)(), (*r_proc)();
VALUE data1, data2;
{
return rb_rescue2(b_proc, data1, r_proc, data2, rb_eStandardError, 0);
}
VALUE
rb_protect(proc, data, state)
VALUE (*proc)();
VALUE data;
int *state;
{
VALUE result; /* OK */
int status;
PUSH_TAG(PROT_NONE);
if ((status = EXEC_TAG()) == 0) {
result = (*proc)(data);
}
POP_TAG();
if (state) {
*state = status;
}
if (status != 0) {
return Qnil;
}
return result;
}
VALUE
rb_ensure(b_proc, data1, e_proc, data2)
VALUE (*b_proc)();
VALUE (*e_proc)();
VALUE data1, data2;
{
int state;
volatile VALUE result = Qnil;
VALUE retval;
PUSH_TAG(PROT_NONE);
if ((state = EXEC_TAG()) == 0) {
result = (*b_proc)(data1);
}
POP_TAG();
retval = prot_tag->retval; /* save retval */
(*e_proc)(data2);
return_value(retval);
if (state) JUMP_TAG(state);
return result;
}
VALUE
rb_with_disable_interrupt(proc, data)
VALUE (*proc)();
VALUE data;
{
VALUE result; /* OK */
int status;
DEFER_INTS;
PUSH_TAG(PROT_NONE);
if ((status = EXEC_TAG()) == 0) {
result = (*proc)(data);
}
POP_TAG();
ALLOW_INTS;
if (status) JUMP_TAG(status);
return result;
}
static int last_call_status;
#define CSTAT_PRIV 1
#define CSTAT_PROT 2
#define CSTAT_VCALL 4
static VALUE
rb_f_missing(argc, argv, obj)
int argc;
VALUE *argv;
VALUE obj;
{
ID id;
volatile VALUE d = 0;
char *format = 0;
char *desc = "";
char *file = ruby_sourcefile;
int line = ruby_sourceline;
if (argc == 0 || !SYMBOL_P(argv[0])) {
rb_raise(rb_eArgError, "no id given");
}
id = SYM2ID(argv[0]);
argc--; argv++;
switch (TYPE(obj)) {
case T_NIL:
format = "undefined method `%s' for nil";
break;
case T_TRUE:
format = "undefined method `%s' for true";
break;
case T_FALSE:
format = "undefined method `%s' for false";
break;
case T_OBJECT:
d = rb_any_to_s(obj);
break;
default:
d = rb_inspect(obj);
break;
}
if (d) {
if (last_call_status & CSTAT_PRIV) {
format = "private method `%s' called for %s%s%s";
}
if (last_call_status & CSTAT_PROT) {
format = "protected method `%s' called for %s%s%s";
}
else if (last_call_status & CSTAT_VCALL) {
const char *mname = rb_id2name(id);
if (('a' <= mname[0] && mname[0] <= 'z') || mname[0] == '_') {
format = "undefined local variable or method `%s' for %s%s%s";
}
}
if (!format) {
format = "undefined method `%s' for %s%s%s";
}
if (RSTRING(d)->len > 65) {
d = rb_any_to_s(obj);
}
desc = RSTRING(d)->ptr;
}
ruby_sourcefile = file;
ruby_sourceline = line;
PUSH_FRAME(); /* fake frame */
*ruby_frame = *_frame.prev->prev;
rb_raise(rb_eNameError, format, rb_id2name(id),
desc, desc[0]=='#'?"":":",
desc[0]=='#'?"":rb_class2name(CLASS_OF(obj)));
POP_FRAME();
return Qnil; /* not reached */
}
static VALUE
rb_undefined(obj, id, argc, argv, call_status)
VALUE obj;
ID id;
int argc;
VALUE*argv;
int call_status;
{
VALUE *nargv;
nargv = ALLOCA_N(VALUE, argc+1);
nargv[0] = ID2SYM(id);
MEMCPY(nargv+1, argv, VALUE, argc);
last_call_status = call_status;
return rb_funcall2(obj, missing, argc+1, nargv);
}
#ifdef DJGPP
static int STACK_LEVEL_MAX = 65535;
#else
#ifdef __human68k__
extern int _stacksize;
# define STACK_LEVEL_MAX (_stacksize - 4096)
#else
#ifdef HAVE_GETRLIMIT
static int STACK_LEVEL_MAX = 655300;
#else
# define STACK_LEVEL_MAX 655300
#endif
#endif
#endif
extern VALUE *rb_gc_stack_start;
static int
stack_length(p)
VALUE **p;
{
#ifdef C_ALLOCA
VALUE stack_end;
alloca(0);
# define STACK_END (&stack_end)
#else
# if defined(__GNUC__) && !defined(__alpha__) && !defined(__APPLE__)
VALUE *stack_end = __builtin_frame_address(0);
# else
VALUE *stack_end = alloca(1);
# endif
# define STACK_END (stack_end)
#endif
if (p) *p = STACK_END;
#ifdef sparc
return rb_gc_stack_start - STACK_END + 0x80;
#else
return (STACK_END < rb_gc_stack_start) ? rb_gc_stack_start - STACK_END
: STACK_END - rb_gc_stack_start;
#endif
}
static VALUE
call_cfunc(func, recv, len, argc, argv)
VALUE (*func)();
VALUE recv;
int len, argc;
VALUE *argv;
{
if (len >= 0 && argc != len) {
rb_raise(rb_eArgError, "wrong # of arguments(%d for %d)",
argc, len);
}
switch (len) {
case -2:
return (*func)(recv, rb_ary_new4(argc, argv));
break;
case -1:
return (*func)(argc, argv, recv);
break;
case 0:
return (*func)(recv);
break;
case 1:
return (*func)(recv, argv[0]);
break;
case 2:
return (*func)(recv, argv[0], argv[1]);
break;
case 3:
return (*func)(recv, argv[0], argv[1], argv[2]);
break;
case 4:
return (*func)(recv, argv[0], argv[1], argv[2], argv[3]);
break;
case 5:
return (*func)(recv, argv[0], argv[1], argv[2], argv[3], argv[4]);
break;
case 6:
return (*func)(recv, argv[0], argv[1], argv[2], argv[3], argv[4],
argv[5]);
break;
case 7:
return (*func)(recv, argv[0], argv[1], argv[2], argv[3], argv[4],
argv[5], argv[6]);
break;
case 8:
return (*func)(recv, argv[0], argv[1], argv[2], argv[3], argv[4],
argv[5], argv[6], argv[7]);
break;
case 9:
return (*func)(recv, argv[0], argv[1], argv[2], argv[3], argv[4],
argv[5], argv[6], argv[7], argv[8]);
break;
case 10:
return (*func)(recv, argv[0], argv[1], argv[2], argv[3], argv[4],
argv[5], argv[6], argv[7], argv[8], argv[9]);
break;
case 11:
return (*func)(recv, argv[0], argv[1], argv[2], argv[3], argv[4],
argv[5], argv[6], argv[7], argv[8], argv[9], argv[10]);
break;
case 12:
return (*func)(recv, argv[0], argv[1], argv[2], argv[3], argv[4],
argv[5], argv[6], argv[7], argv[8], argv[9],
argv[10], argv[11]);
break;
case 13:
return (*func)(recv, argv[0], argv[1], argv[2], argv[3], argv[4],
argv[5], argv[6], argv[7], argv[8], argv[9], argv[10],
argv[11], argv[12]);
break;
case 14:
return (*func)(recv, argv[0], argv[1], argv[2], argv[3], argv[4],
argv[5], argv[6], argv[7], argv[8], argv[9], argv[10],
argv[11], argv[12], argv[13]);
break;
case 15:
return (*func)(recv, argv[0], argv[1], argv[2], argv[3], argv[4],
argv[5], argv[6], argv[7], argv[8], argv[9], argv[10],
argv[11], argv[12], argv[13], argv[14]);
break;
default:
rb_raise(rb_eArgError, "too many arguments(%d)", len);
break;
}
return Qnil; /* not reached */
}
static VALUE
rb_call0(klass, recv, id, argc, argv, body, nosuper)
VALUE klass, recv;
ID id;
int argc; /* OK */
VALUE *argv; /* OK */
NODE *body; /* OK */
int nosuper;
{
NODE *b2; /* OK */
volatile VALUE result = Qnil;
int itr;
static int tick;
TMP_PROTECT;
switch (ruby_iter->iter) {
case ITER_PRE:
itr = ITER_CUR;
break;
case ITER_CUR:
default:
itr = ITER_NOT;
break;
}
if ((++tick & 0xff) == 0) {
CHECK_INTS; /* better than nothing */
if (stack_length(0) > STACK_LEVEL_MAX) {
rb_raise(rb_eSysStackError, "stack level too deep");
}
}
PUSH_ITER(itr);
PUSH_FRAME();
ruby_frame->last_func = id;
ruby_frame->last_class = nosuper?0:klass;
ruby_frame->self = recv;
ruby_frame->argc = argc;
ruby_frame->argv = argv;
switch (nd_type(body)) {
case NODE_CFUNC:
{
int len = body->nd_argc;
if (len < -2) {
rb_bug("bad argc(%d) specified for `%s(%s)'",
len, rb_class2name(klass), rb_id2name(id));
}
if (trace_func) {
int state;
char *file = ruby_frame->prev->file;
int line = ruby_frame->prev->line;
if (!file) {
file = ruby_sourcefile;
line = ruby_sourceline;
}
call_trace_func("c-call", 0, 0, recv, id, klass);
PUSH_TAG(PROT_FUNC);
if ((state = EXEC_TAG()) == 0) {
result = call_cfunc(body->nd_cfnc, recv, len, argc, argv);
}
POP_TAG();
call_trace_func("c-return", 0, 0, recv, id, klass);
if (state) JUMP_TAG(state);
}
else {
result = call_cfunc(body->nd_cfnc, recv, len, argc, argv);
}
}
break;
/* for re-scoped/renamed method */
case NODE_ZSUPER:
/* for attr get/set */
case NODE_ATTRSET:
case NODE_IVAR:
result = rb_eval(recv, body);
break;
case NODE_DMETHOD:
result = method_call(argc, argv, umethod_bind(body->nd_cval, recv));
break;
case NODE_BMETHOD:
result = proc_call(body->nd_cval, rb_ary_new4(argc, argv));
break;
default:
{
int state;
VALUE *local_vars; /* OK */
PUSH_SCOPE();
if (body->nd_rval) ruby_frame->cbase = body->nd_rval;
if (body->nd_tbl) {
local_vars = TMP_ALLOC(body->nd_tbl[0]+1);
*local_vars++ = (VALUE)body;
rb_mem_clear(local_vars, body->nd_tbl[0]);
ruby_scope->local_tbl = body->nd_tbl;
ruby_scope->local_vars = local_vars;
}
else {
local_vars = ruby_scope->local_vars = 0;
ruby_scope->local_tbl = 0;
}
b2 = body = body->nd_next;
PUSH_VARS();
PUSH_TAG(PROT_FUNC);
if ((state = EXEC_TAG()) == 0) {
NODE *node = 0;
int i;
if (nd_type(body) == NODE_ARGS) {
node = body;
body = 0;
}
else if (nd_type(body) == NODE_BLOCK) {
node = body->nd_head;
body = body->nd_next;
}
if (node) {
if (nd_type(node) != NODE_ARGS) {
rb_bug("no argument-node");
}
i = node->nd_cnt;
if (i > argc) {
rb_raise(rb_eArgError, "wrong # of arguments(%d for %d)",
argc, i);
}
if (node->nd_rest == -1) {
int opt = i;
NODE *optnode = node->nd_opt;
while (optnode) {
opt++;
optnode = optnode->nd_next;
}
if (opt < argc) {
rb_raise(rb_eArgError, "wrong # of arguments(%d for %d)",
argc, opt);
}
ruby_frame->argc = opt;
ruby_frame->argv = local_vars+2;
}
if (local_vars) {
if (i > 0) {
/* +2 for $_ and $~ */
MEMCPY(local_vars+2, argv, VALUE, i);
}
argv += i; argc -= i;
if (node->nd_opt) {
NODE *opt = node->nd_opt;
while (opt && argc) {
assign(recv, opt->nd_head, *argv, 1);
argv++; argc--;
opt = opt->nd_next;
}
rb_eval(recv, opt);
}
if (node->nd_rest >= 0) {
if (argc > 0)
local_vars[node->nd_rest]=rb_ary_new4(argc,argv);
else
local_vars[node->nd_rest]=rb_ary_new2(0);
}
}
}
if (trace_func) {
call_trace_func("call", b2->nd_file, nd_line(b2),
recv, id, klass);
}
result = rb_eval(recv, body);
}
else if (state == TAG_RETURN) {
result = prot_tag->retval;
state = 0;
}
POP_TAG();
POP_VARS();
POP_SCOPE();
if (trace_func) {
char *file = ruby_frame->prev->file;
int line = ruby_frame->prev->line;
if (!file) {
file = ruby_sourcefile;
line = ruby_sourceline;
}
call_trace_func("return", file, line, recv, id, klass);
}
switch (state) {
case 0:
break;
case TAG_NEXT:
rb_raise(rb_eLocalJumpError, "unexpected next");
break;
case TAG_BREAK:
rb_raise(rb_eLocalJumpError, "unexpected break");
break;
case TAG_REDO:
rb_raise(rb_eLocalJumpError, "unexpected redo");
break;
case TAG_RETRY:
if (!rb_block_given_p()) {
rb_raise(rb_eLocalJumpError, "retry outside of rescue clause");
}
default:
JUMP_TAG(state);
}
}
}
POP_FRAME();
POP_ITER();
TMP_PROTECT_END;
return result;
}
static VALUE
rb_call(klass, recv, mid, argc, argv, scope)
VALUE klass, recv;
ID mid;
int argc; /* OK */
VALUE *argv; /* OK */
int scope;
{
NODE *body; /* OK */
int noex;
ID id = mid;
struct cache_entry *ent;
/* is it in the method cache? */
ent = cache + EXPR1(klass, mid);
if (ent->mid == mid && ent->klass == klass) {
if (!ent->method)
return rb_undefined(recv, mid, argc, argv, scope==2?CSTAT_VCALL:0);
klass = ent->origin;
id = ent->mid0;
noex = ent->noex;
body = ent->method;
}
else if ((body = rb_get_method_body(&klass, &id, &noex)) == 0) {
if (scope == 3) {
rb_raise(rb_eNameError, "super: no superclass method `%s'",
rb_id2name(mid));
}
return rb_undefined(recv, mid, argc, argv, scope==2?CSTAT_VCALL:0);
}
if (mid != missing) {
/* receiver specified form for private method */
if ((noex & NOEX_PRIVATE) && scope == 0)
return rb_undefined(recv, mid, argc, argv, CSTAT_PRIV);
/* self must be kind of a specified form for private method */
if ((noex & NOEX_PROTECTED)) {
VALUE defined_class = klass;
while (TYPE(defined_class) == T_ICLASS)
defined_class = RBASIC(defined_class)->klass;
if (!rb_obj_is_kind_of(ruby_frame->self, defined_class))
return rb_undefined(recv, mid, argc, argv, CSTAT_PROT);
}
}
return rb_call0(klass, recv, id, argc, argv, body, noex & NOEX_UNDEF);
}
VALUE
rb_apply(recv, mid, args)
VALUE recv;
ID mid;
VALUE args;
{
int argc;
VALUE *argv;
argc = RARRAY(args)->len;
argv = ALLOCA_N(VALUE, argc);
MEMCPY(argv, RARRAY(args)->ptr, VALUE, argc);
return rb_call(CLASS_OF(recv), recv, mid, argc, argv, 1);
}
static VALUE
rb_f_send(argc, argv, recv)
int argc;
VALUE *argv;
VALUE recv;
{
VALUE vid;
if (argc == 0) rb_raise(rb_eArgError, "no method name given");
vid = *argv++; argc--;
PUSH_ITER(rb_block_given_p()?ITER_PRE:ITER_NOT);
vid = rb_call(CLASS_OF(recv), recv, rb_to_id(vid), argc, argv, 1);
POP_ITER();
return vid;
}
#ifdef HAVE_STDARG_PROTOTYPES
#include <stdarg.h>
#define va_init_list(a,b) va_start(a,b)
#else
#include <varargs.h>
#define va_init_list(a,b) va_start(a)
#endif
VALUE
#ifdef HAVE_STDARG_PROTOTYPES
rb_funcall(VALUE recv, ID mid, int n, ...)
#else
rb_funcall(recv, mid, n, va_alist)
VALUE recv;
ID mid;
int n;
va_dcl
#endif
{
va_list ar;
VALUE *argv;
if (n > 0) {
int i;
argv = ALLOCA_N(VALUE, n);
va_init_list(ar, n);
for (i=0;i<n;i++) {
argv[i] = va_arg(ar, VALUE);
}
va_end(ar);
}
else {
argv = 0;
}
return rb_call(CLASS_OF(recv), recv, mid, n, argv, 1);
}
VALUE
rb_funcall2(recv, mid, argc, argv)
VALUE recv;
ID mid;
int argc;
VALUE *argv;
{
return rb_call(CLASS_OF(recv), recv, mid, argc, argv, 1);
}
VALUE
rb_funcall3(recv, mid, argc, argv)
VALUE recv;
ID mid;
int argc;
VALUE *argv;
{
return rb_call(CLASS_OF(recv), recv, mid, argc, argv, 0);
}
VALUE
rb_call_super(argc, argv)
int argc;
VALUE *argv;
{
VALUE result;
if (ruby_frame->last_class == 0) {
rb_raise(rb_eNameError, "superclass method `%s' must be enabled by rb_enable_super()",
rb_id2name(ruby_frame->last_func));
}
PUSH_ITER(ruby_iter->iter?ITER_PRE:ITER_NOT);
result = rb_call(RCLASS(ruby_frame->last_class)->super,
ruby_frame->self, ruby_frame->last_func,
argc, argv, 3);
POP_ITER();
return result;
}
static VALUE
backtrace(lev)
int lev;
{
struct FRAME *frame = ruby_frame;
char buf[BUFSIZ];
VALUE ary;
ary = rb_ary_new();
if (lev < 0) {
if (frame->last_func) {
snprintf(buf, BUFSIZ, "%s:%d:in `%s'",
ruby_sourcefile, ruby_sourceline,
rb_id2name(frame->last_func));
}
else if (ruby_sourceline == 0) {
snprintf(buf, BUFSIZ, "%s", ruby_sourcefile);
}
else {
snprintf(buf, BUFSIZ, "%s:%d", ruby_sourcefile, ruby_sourceline);
}
rb_ary_push(ary, rb_str_new2(buf));
}
else {
while (lev-- > 0) {
frame = frame->prev;
if (!frame) {
ary = Qnil;
break;
}
}
}
while (frame && frame->file) {
if (frame->prev && frame->prev->last_func) {
snprintf(buf, BUFSIZ, "%s:%d:in `%s'",
frame->file, frame->line,
rb_id2name(frame->prev->last_func));
}
else {
snprintf(buf, BUFSIZ, "%s:%d", frame->file, frame->line);
}
rb_ary_push(ary, rb_str_new2(buf));
frame = frame->prev;
}
return ary;
}
static VALUE
rb_f_caller(argc, argv)
int argc;
VALUE *argv;
{
VALUE level;
int lev;
rb_scan_args(argc, argv, "01", &level);
if (NIL_P(level)) lev = 1;
else lev = NUM2INT(level);
if (lev < 0) rb_raise(rb_eArgError, "negative level(%d)", lev);
return backtrace(lev);
}
void
rb_backtrace()
{
int i;
VALUE ary;
ary = backtrace(-1);
for (i=0; i<RARRAY(ary)->len; i++) {
printf("\tfrom %s\n", RSTRING(RARRAY(ary)->ptr[i])->ptr);
}
}
static VALUE
make_backtrace()
{
return backtrace(-1);
}
ID
rb_frame_last_func()
{
return ruby_frame->last_func;
}
static NODE*
compile(src, file, line)
VALUE src;
char *file;
int line;
{
NODE *node;
ruby_nerrs = 0;
Check_Type(src, T_STRING);
node = rb_compile_string(file, src, line);
if (ruby_nerrs == 0) return node;
return 0;
}
static VALUE
eval(self, src, scope, file, line)
VALUE self, src, scope;
char *file;
int line;
{
struct BLOCK *data;
volatile VALUE result = Qnil;
struct SCOPE * volatile old_scope;
struct BLOCK * volatile old_block;
struct RVarmap * volatile old_dyna_vars;
int volatile old_vmode;
struct FRAME frame;
char *filesave = ruby_sourcefile;
int linesave = ruby_sourceline;
volatile int iter = ruby_frame->iter;
int state;
if (file == 0) {
file = ruby_sourcefile;
line = ruby_sourceline;
}
if (!NIL_P(scope)) {
if (!rb_obj_is_block(scope)) {
rb_raise(rb_eTypeError, "wrong argument type %s (expected Proc/Binding)",
rb_class2name(CLASS_OF(scope)));
}
Data_Get_Struct(scope, struct BLOCK, data);
/* PUSH BLOCK from data */
frame = data->frame;
frame.tmp = ruby_frame; /* gc protection */
ruby_frame = &(frame);
old_scope = ruby_scope;
ruby_scope = data->scope;
old_block = ruby_block;
ruby_block = data->prev;
old_dyna_vars = ruby_dyna_vars;
ruby_dyna_vars = data->dyna_vars;
old_vmode = scope_vmode;
scope_vmode = data->vmode;
self = data->self;
ruby_frame->iter = data->iter;
}
else {
if (ruby_frame->prev) {
ruby_frame->iter = ruby_frame->prev->iter;
}
}
PUSH_CLASS();
ruby_class = ruby_cbase;
ruby_in_eval++;
if (TYPE(ruby_class) == T_ICLASS) {
ruby_class = RBASIC(ruby_class)->klass;
}
PUSH_TAG(PROT_NONE);
if ((state = EXEC_TAG()) == 0) {
NODE *node;
result = ruby_errinfo;
ruby_errinfo = Qnil;
node = compile(src, file, line);
if (ruby_nerrs > 0) {
compile_error(0);
}
if (!NIL_P(result)) ruby_errinfo = result;
result = eval_node(self, node);
}
POP_TAG();
POP_CLASS();
ruby_in_eval--;
if (!NIL_P(scope)) {
ruby_frame = frame.tmp;
if (ruby_scope->flag & SCOPE_DONT_RECYCLE)
scope_dup(old_scope);
ruby_scope = old_scope;
ruby_block = old_block;
ruby_dyna_vars = old_dyna_vars;
data->vmode = scope_vmode; /* write back visibility mode */
scope_vmode = old_vmode;
}
else {
ruby_frame->iter = iter;
}
ruby_sourcefile = filesave;
ruby_sourceline = linesave;
if (state) {
if (state == TAG_RAISE) {
VALUE err;
VALUE errat;
if (strcmp(file, "(eval)") == 0) {
if (ruby_sourceline > 1) {
errat = get_backtrace(ruby_errinfo);
err = RARRAY(errat)->ptr[0];
rb_str_cat2(err, ": ");
rb_str_append(err, ruby_errinfo);
}
else {
err = rb_str_dup(ruby_errinfo);
}
errat = Qnil;
rb_exc_raise(rb_exc_new3(CLASS_OF(ruby_errinfo), err));
}
rb_exc_raise(ruby_errinfo);
}
JUMP_TAG(state);
}
return result;
}
static VALUE
rb_f_eval(argc, argv, self)
int argc;
VALUE *argv;
VALUE self;
{
VALUE src, scope, vfile, vline;
char *file = "(eval)";
int line = 1;
rb_scan_args(argc, argv, "13", &src, &scope, &vfile, &vline);
if (argc >= 3) {
Check_Type(vfile, T_STRING);
file = RSTRING(vfile)->ptr;
}
if (argc >= 4) {
line = NUM2INT(vline);
}
if (ruby_safe_level >= 4) {
Check_Type(src, T_STRING);
}
else {
Check_SafeStr(src);
}
if (NIL_P(scope) && ruby_frame->prev) {
struct FRAME *prev;
VALUE val;
prev = ruby_frame;
PUSH_FRAME();
*ruby_frame = *prev->prev;
ruby_frame->prev = prev;
val = eval(self, src, scope, file, line);
POP_FRAME();
return val;
}
return eval(self, src, scope, file, line);
}
/* function to call func under the specified class/module context */
static VALUE
exec_under(func, under, args)
VALUE (*func)();
VALUE under;
void *args;
{
VALUE val; /* OK */
int state;
int mode;
PUSH_CLASS();
ruby_class = under;
PUSH_FRAME();
ruby_frame->last_func = _frame.prev->last_func;
ruby_frame->last_class = _frame.prev->last_class;
ruby_frame->argc = _frame.prev->argc;
ruby_frame->argv = _frame.prev->argv;
if (ruby_cbase != under) {
ruby_frame->cbase = (VALUE)rb_node_newnode(NODE_CREF,under,0,ruby_frame->cbase);
}
mode = scope_vmode;
SCOPE_SET(SCOPE_PUBLIC);
PUSH_TAG(PROT_NONE);
if ((state = EXEC_TAG()) == 0) {
val = (*func)(args);
}
POP_TAG();
SCOPE_SET(mode);
POP_FRAME();
POP_CLASS();
if (state) JUMP_TAG(state);
return val;
}
static VALUE
eval_under_i(args)
VALUE *args;
{
return eval(args[0], args[1], Qnil, (char*)args[2], (int)args[3]);
}
/* string eval under the class/module context */
static VALUE
eval_under(under, self, src, file, line)
VALUE under, self, src;
const char *file;
int line;
{
VALUE args[4];
if (ruby_safe_level >= 4) {
Check_Type(src, T_STRING);
}
else {
Check_SafeStr(src);
}
args[0] = self;
args[1] = src;
args[2] = (VALUE)file;
args[3] = (VALUE)line;
return exec_under(eval_under_i, under, args);
}
static VALUE
yield_under_i(self)
VALUE self;
{
if (ruby_block->flags & BLOCK_DYNAMIC) {
struct BLOCK * volatile old_block = ruby_block;
struct BLOCK block;
/* cbase should be pointed from volatile local variable */
/* to be protected from GC. */
VALUE result;
int state;
block = *ruby_block;
/* copy the block to avoid modifying global data. */
block.frame.cbase = ruby_frame->cbase;
ruby_block = &block;
PUSH_TAG(PROT_NONE);
if ((state = EXEC_TAG()) == 0) {
result = rb_yield_0(self, self, ruby_class, 0);
}
POP_TAG();
ruby_block = old_block;
if (state) JUMP_TAG(state);
return result;
}
/* static block, no need to restore */
ruby_block->frame.cbase = ruby_frame->cbase;
return rb_yield_0(self, self, ruby_class, 0);
}
/* block eval under the class/module context */
static VALUE
yield_under(under, self)
VALUE under, self;
{
if (rb_safe_level() >= 4 && !OBJ_TAINTED(self))
rb_raise(rb_eSecurityError, "Insecure: can't eval");
return exec_under(yield_under_i, under, self);
}
static VALUE
specific_eval(argc, argv, klass, self)
int argc;
VALUE *argv;
VALUE klass, self;
{
if (rb_block_given_p()) {
if (argc > 0) {
rb_raise(rb_eArgError, "wrong # of arguments (%d for 0)", argc);
}
return yield_under(klass, self);
}
else {
char *file = "(eval)";
int line = 1;
if (argc == 0) {
rb_raise(rb_eArgError, "block not supplied");
}
else {
if (ruby_safe_level >= 4) {
Check_Type(argv[0], T_STRING);
}
else {
Check_SafeStr(argv[0]);
}
if (argc > 3) {
rb_raise(rb_eArgError, "wrong # of arguments: %s(src) or %s{..}",
rb_id2name(ruby_frame->last_func),
rb_id2name(ruby_frame->last_func));
}
if (argc > 1) file = STR2CSTR(argv[1]);
if (argc > 2) line = NUM2INT(argv[2]);
}
return eval_under(klass, self, argv[0], file, line);
}
}
VALUE
rb_obj_instance_eval(argc, argv, self)
int argc;
VALUE *argv;
VALUE self;
{
VALUE klass;
if (rb_special_const_p(self)) {
klass = Qnil;
}
else {
klass = rb_singleton_class(self);
}
return specific_eval(argc, argv, klass, self);
}
static VALUE
rb_mod_module_eval(argc, argv, mod)
int argc;
VALUE *argv;
VALUE mod;
{
return specific_eval(argc, argv, mod, mod);
}
VALUE rb_load_path;
void
rb_load(fname, wrap)
VALUE fname;
int wrap;
{
int state;
char *file;
volatile ID last_func;
volatile VALUE wrapper = 0;
volatile VALUE self = ruby_top_self;
TMP_PROTECT;
if (wrap) {
Check_Type(fname, T_STRING);
}
else {
Check_SafeStr(fname);
}
file = rb_find_file(RSTRING(fname)->ptr);
if (!file) {
rb_raise(rb_eLoadError, "No such file to load -- %s", RSTRING(fname)->ptr);
}
ruby_errinfo = Qnil; /* ensure */
PUSH_VARS();
PUSH_CLASS();
wrapper = ruby_wrapper;
if (!wrap) {
rb_secure(4); /* should alter global state */
ruby_class = rb_cObject;
ruby_wrapper = 0;
}
else {
/* load in anonymous module as toplevel */
ruby_class = ruby_wrapper = rb_module_new();
self = rb_obj_clone(ruby_top_self);
rb_extend_object(self, ruby_class);
}
PUSH_FRAME();
ruby_frame->last_func = 0;
ruby_frame->last_class = 0;
ruby_frame->self = self;
ruby_frame->cbase = (VALUE)rb_node_newnode(NODE_CREF,ruby_class,0,0);
PUSH_SCOPE();
if (ruby_class == rb_cObject && top_scope->local_tbl) {
int len = top_scope->local_tbl[0]+1;
ID *tbl = ALLOC_N(ID, len);
VALUE *vars = TMP_ALLOC(len);
*vars++ = 0;
MEMCPY(tbl, top_scope->local_tbl, ID, len);
MEMCPY(vars, top_scope->local_vars, VALUE, len-1);
ruby_scope->local_tbl = tbl; /* copy toplevel scope */
ruby_scope->local_vars = vars; /* will not alter toplevel variables */
}
/* default visibility is private at loading toplevel */
SCOPE_SET(SCOPE_PRIVATE);
PUSH_TAG(PROT_NONE);
state = EXEC_TAG();
last_func = ruby_frame->last_func;
if (state == 0) {
NODE *node;
DEFER_INTS;
ruby_in_eval++;
rb_load_file(file);
ruby_in_eval--;
node = ruby_eval_tree;
ALLOW_INTS;
if (ruby_nerrs == 0) {
eval_node(self, node);
}
}
ruby_frame->last_func = last_func;
if (ruby_scope->flag == SCOPE_ALLOCA && ruby_class == rb_cObject) {
if (ruby_scope->local_tbl) /* toplevel was empty */
free(ruby_scope->local_tbl);
}
POP_TAG();
POP_SCOPE();
POP_FRAME();
POP_CLASS();
POP_VARS();
ruby_wrapper = wrapper;
if (ruby_nerrs > 0) {
ruby_nerrs = 0;
rb_exc_raise(ruby_errinfo);
}
TMP_PROTECT_END;
if (state) JUMP_TAG(state);
if (!NIL_P(ruby_errinfo)) /* exception during load */
rb_exc_raise(ruby_errinfo);
}
void
rb_load_protect(fname, wrap, state)
VALUE fname;
int wrap;
int *state;
{
int status;
PUSH_TAG(PROT_NONE);
if ((status = EXEC_TAG()) == 0) {
rb_load(fname, wrap);
}
POP_TAG();
if (state) *state = status;
}
static VALUE
rb_f_load(argc, argv)
int argc;
VALUE *argv;
{
VALUE fname, wrap;
rb_scan_args(argc, argv, "11", &fname, &wrap);
rb_load(fname, RTEST(wrap));
return Qtrue;
}
static VALUE rb_features;
static st_table *loading_tbl;
static int
rb_feature_p(feature, wait)
const char *feature;
int wait;
{
VALUE *p, *pend;
char *f;
int len;
p = RARRAY(rb_features)->ptr;
pend = p + RARRAY(rb_features)->len;
while (p < pend) {
f = STR2CSTR(*p);
if (strcmp(f, feature) == 0) {
goto load_wait;
}
len = strlen(feature);
if (strncmp(f, feature, len) == 0) {
if (strcmp(f+len, ".so") == 0) {
return Qtrue;
}
if (strcmp(f+len, ".rb") == 0) {
if (wait) goto load_wait;
return Qtrue;
}
}
p++;
}
return Qfalse;
load_wait:
if (loading_tbl) {
char *ext = strrchr(f, '.');
if (strcmp(ext, ".rb") == 0) {
rb_thread_t th;
while (st_lookup(loading_tbl, f, &th)) {
if (th == curr_thread) {
rb_raise(rb_eLoadError, "infinite load loop -- %s", f);
}
CHECK_INTS;
rb_thread_schedule();
}
}
}
return Qtrue;
}
int
rb_provided(feature)
const char *feature;
{
return rb_feature_p(feature, Qfalse);
}
void
rb_provide(feature)
const char *feature;
{
char *buf, *ext;
ext = strrchr(feature, '.');
if (ext && (strcmp(DLEXT, ext) == 0
#ifdef DLEXT2
|| strcmp(DLEXT2, ext) == 0
#endif
)) {
buf = ALLOCA_N(char, strlen(feature)+4);
strcpy(buf, feature);
ext = strrchr(buf, '.');
strcpy(ext, ".so");
feature = buf;
}
if (rb_feature_p(feature, Qtrue)) return;
rb_ary_push(rb_features, rb_str_new2(feature));
}
VALUE
rb_f_require(obj, fname)
VALUE obj, fname;
{
char *ext, *file, *feature, *buf; /* OK */
volatile VALUE load;
int state;
volatile int safe = ruby_safe_level;
Check_SafeStr(fname);
if (rb_feature_p(RSTRING(fname)->ptr, Qtrue))
return Qfalse;
ext = strrchr(RSTRING(fname)->ptr, '.');
if (ext) {
feature = file = RSTRING(fname)->ptr;
if (strcmp(".rb", ext) == 0) {
file = rb_find_file(file);
if (file) goto load_rb;
}
else if (strcmp(".so", ext) == 0 || strcmp(".o", ext) == 0) {
if (strcmp(ext, DLEXT) != 0) {
buf = ALLOCA_N(char, strlen(file)+sizeof(DLEXT)+4);
strcpy(buf, feature);
ext = strrchr(buf, '.');
strcpy(ext, DLEXT);
file = feature = buf;
}
file = rb_find_file(file);
if (file) goto load_dyna;
#ifdef DLEXT2
file = feature = RSTRING(fname)->ptr;
if (strcmp(ext, DLEXT2) != 0) {
buf = ALLOCA_N(char, strlen(file)+sizeof(DLEXT2)+4);
strcpy(buf, feature);
ext = strrchr(buf, '.');
strcpy(ext, DLEXT2);
file = feature = buf;
}
file = rb_find_file(file);
if (file) goto load_dyna;
#endif
}
else if (strcmp(DLEXT, ext) == 0) {
feature = RSTRING(fname)->ptr;
file = rb_find_file(feature);
if (file) goto load_dyna;
}
#ifdef DLEXT2
else if (strcmp(DLEXT2, ext) == 0) {
feature = RSTRING(fname)->ptr;
file = rb_find_file(feature);
if (file) goto load_dyna;
}
#endif
}
buf = ALLOCA_N(char, strlen(RSTRING(fname)->ptr) + 5);
strcpy(buf, RSTRING(fname)->ptr);
strcat(buf, ".rb");
if (rb_find_file(buf)) {
fname = rb_str_new2(buf);
feature = buf;
goto load_rb;
}
strcpy(buf, RSTRING(fname)->ptr);
strcat(buf, DLEXT);
file = rb_find_file(buf);
if (file) {
feature = buf;
goto load_dyna;
}
#ifdef DLEXT2
strcpy(buf, RSTRING(fname)->ptr);
strcat(buf, DLEXT2);
file = rb_find_file(buf);
if (file) {
feature = buf;
goto load_dyna;
}
#endif
rb_raise(rb_eLoadError, "No such file to load -- %s",
RSTRING(fname)->ptr);
load_dyna:
rb_provide(feature);
PUSH_TAG(PROT_NONE);
if ((state = EXEC_TAG()) == 0) {
load = rb_str_new2(file);
file = RSTRING(load)->ptr;
dln_load(file);
}
POP_TAG();
if (state) JUMP_TAG(state);
return Qtrue;
load_rb:
ruby_safe_level = 0;
rb_provide(feature);
/* loading ruby library should be serialized. */
if (!loading_tbl) {
loading_tbl = st_init_strtable();
}
/* partial state */
st_insert(loading_tbl, strdup(feature), curr_thread);
PUSH_TAG(PROT_NONE);
if ((state = EXEC_TAG()) == 0) {
rb_load(fname, 0);
}
POP_TAG();
st_delete(loading_tbl, &feature, 0); /* loading done */
free(feature);
ruby_safe_level = safe;
if (state) JUMP_TAG(state);
return Qtrue;
}
VALUE
rb_require(fname)
const char *fname;
{
return rb_f_require(Qnil, rb_str_new2(fname));
}
static void
set_method_visibility(self, argc, argv, ex)
VALUE self;
int argc;
VALUE *argv;
ID ex;
{
int i;
for (i=0; i<argc; i++) {
rb_export_method(self, rb_to_id(argv[i]), ex);
}
}
static VALUE
rb_mod_public(argc, argv, module)
int argc;
VALUE *argv;
VALUE module;
{
if (argc == 0) {
SCOPE_SET(SCOPE_PUBLIC);
}
else {
set_method_visibility(module, argc, argv, NOEX_PUBLIC);
}
return module;
}
static VALUE
rb_mod_protected(argc, argv, module)
int argc;
VALUE *argv;
VALUE module;
{
if (argc == 0) {
SCOPE_SET(SCOPE_PROTECTED);
}
else {
set_method_visibility(module, argc, argv, NOEX_PROTECTED);
}
return module;
}
static VALUE
rb_mod_private(argc, argv, module)
int argc;
VALUE *argv;
VALUE module;
{
if (argc == 0) {
SCOPE_SET(SCOPE_PRIVATE);
}
else {
set_method_visibility(module, argc, argv, NOEX_PRIVATE);
}
return module;
}
static VALUE
rb_mod_public_method(argc, argv, obj)
int argc;
VALUE *argv;
VALUE obj;
{
set_method_visibility(CLASS_OF(obj), argc, argv, NOEX_PUBLIC);
return obj;
}
static VALUE
rb_mod_private_method(argc, argv, obj)
int argc;
VALUE *argv;
VALUE obj;
{
set_method_visibility(CLASS_OF(obj), argc, argv, NOEX_PRIVATE);
return obj;
}
static VALUE
top_public(argc, argv)
int argc;
VALUE *argv;
{
return rb_mod_public(argc, argv, rb_cObject);
}
static VALUE
top_private(argc, argv)
int argc;
VALUE *argv;
{
return rb_mod_private(argc, argv, rb_cObject);
}
static VALUE
rb_mod_modfunc(argc, argv, module)
int argc;
VALUE *argv;
VALUE module;
{
int i;
ID id;
NODE *body;
if (TYPE(module) != T_MODULE) {
rb_raise(rb_eTypeError, "module_function must be called for modules");
}
if (argc == 0) {
SCOPE_SET(SCOPE_MODFUNC);
return module;
}
set_method_visibility(module, argc, argv, NOEX_PRIVATE);
for (i=0; i<argc; i++) {
id = rb_to_id(argv[i]);
body = search_method(module, id, 0);
if (body == 0 || body->nd_body == 0) {
rb_bug("undefined method `%s'; can't happen", rb_id2name(id));
}
rb_add_method(rb_singleton_class(module), id, body->nd_body, NOEX_PUBLIC);
rb_clear_cache_by_id(id);
rb_funcall(module, singleton_added, 1, ID2SYM(id));
}
return module;
}
static VALUE
rb_mod_append_features(module, include)
VALUE module, include;
{
switch (TYPE(include)) {
case T_CLASS:
case T_MODULE:
break;
default:
Check_Type(include, T_CLASS);
break;
}
rb_include_module(include, module);
return module;
}
static VALUE
rb_mod_include(argc, argv, module)
int argc;
VALUE *argv;
VALUE module;
{
int i;
for (i=0; i<argc; i++) {
Check_Type(argv[i], T_MODULE);
rb_funcall(argv[i], rb_intern("append_features"), 1, module);
}
return module;
}
void
rb_obj_call_init(obj, argc, argv)
VALUE obj;
int argc;
VALUE *argv;
{
PUSH_ITER(rb_block_given_p()?ITER_PRE:ITER_NOT);
rb_funcall2(obj, init, argc, argv);
POP_ITER();
}
VALUE
rb_class_new_instance(argc, argv, klass)
int argc;
VALUE *argv;
VALUE klass;
{
VALUE obj;
if (FL_TEST(klass, FL_SINGLETON)) {
rb_raise(rb_eTypeError, "can't create instance of virtual class");
}
obj = rb_obj_alloc(klass);
rb_obj_call_init(obj, argc, argv);
return obj;
}
static VALUE
top_include(argc, argv)
int argc;
VALUE *argv;
{
rb_secure(4);
return rb_mod_include(argc, argv, rb_cObject);
}
void
rb_extend_object(obj, module)
VALUE obj, module;
{
rb_include_module(rb_singleton_class(obj), module);
}
static VALUE
rb_mod_extend_object(mod, obj)
VALUE mod, obj;
{
rb_extend_object(obj, mod);
return obj;
}
static VALUE
rb_obj_extend(argc, argv, obj)
int argc;
VALUE *argv;
VALUE obj;
{
int i;
if (argc == 0) {
rb_raise(rb_eArgError, "wrong # of arguments(0 for 1)");
}
for (i=0; i<argc; i++) Check_Type(argv[i], T_MODULE);
for (i=0; i<argc; i++) {
rb_funcall(argv[i], rb_intern("extend_object"), 1, obj);
}
return obj;
}
VALUE rb_f_trace_var();
VALUE rb_f_untrace_var();
static void
errinfo_setter(val, id, var)
VALUE val;
ID id;
VALUE *var;
{
if (!NIL_P(val) && !rb_obj_is_kind_of(val, rb_eException)) {
rb_raise(rb_eTypeError, "assigning non-exception to $!");
}
*var = val;
}
static VALUE
errat_getter(id)
ID id;
{
return get_backtrace(ruby_errinfo);
}
static void
errat_setter(val, id, var)
VALUE val;
ID id;
VALUE *var;
{
if (NIL_P(ruby_errinfo)) {
rb_raise(rb_eArgError, "$! not set");
}
set_backtrace(ruby_errinfo, val);
}
static VALUE
rb_f_local_variables()
{
ID *tbl;
int n, i;
VALUE ary = rb_ary_new();
struct RVarmap *vars;
tbl = ruby_scope->local_tbl;
if (tbl) {
n = *tbl++;
for (i=2; i<n; i++) { /* skip first 2 ($_ and $~) */
if (tbl[i] == 0) continue; /* skip flip states */
rb_ary_push(ary, rb_str_new2(rb_id2name(tbl[i])));
}
}
vars = ruby_dyna_vars;
while (vars) {
if (vars->id) {
rb_ary_push(ary, rb_str_new2(rb_id2name(vars->id)));
}
vars = vars->next;
}
return ary;
}
static VALUE rb_f_catch _((VALUE,VALUE));
static VALUE rb_f_throw _((int,VALUE*)) NORETURN;
struct end_proc_data {
void (*func)();
VALUE data;
struct end_proc_data *next;
};
static struct end_proc_data *end_procs, *ephemeral_end_procs;
void
rb_set_end_proc(func, data)
void (*func)();
VALUE data;
{
struct end_proc_data *link = ALLOC(struct end_proc_data);
struct end_proc_data **list;
if (ruby_wrapper) list = &ephemeral_end_procs;
else list = &end_procs;
link->next = *list;
link->func = func;
link->data = data;
*list = link;
}
void
rb_mark_end_proc()
{
struct end_proc_data *link;
link = end_procs;
while (link) {
rb_gc_mark(link->data);
link = link->next;
}
link = ephemeral_end_procs;
while (link) {
rb_gc_mark(link->data);
link = link->next;
}
}
static void
call_end_proc(data)
VALUE data;
{
PUSH_ITER(ITER_NOT);
PUSH_FRAME();
ruby_frame->self = ruby_frame->prev->self;
ruby_frame->last_func = 0;
ruby_frame->last_class = 0;
proc_call(data, Qundef);
POP_FRAME();
POP_ITER();
}
static void
rb_f_END()
{
PUSH_FRAME();
ruby_frame->argc = 0;
rb_set_end_proc(call_end_proc, rb_f_lambda());
POP_FRAME();
}
static VALUE
rb_f_at_exit()
{
VALUE proc;
proc = rb_f_lambda();
rb_set_end_proc(call_end_proc, proc);
return proc;
}
void
rb_exec_end_proc()
{
struct end_proc_data *link;
int status;
link = end_procs;
while (link) {
rb_protect((VALUE(*)())link->func, link->data, &status);
if (status) {
error_handle(status);
}
link = link->next;
}
while (ephemeral_end_procs) {
link = ephemeral_end_procs;
ephemeral_end_procs = link->next;
rb_protect((VALUE(*)())link->func, link->data, &status);
if (status) {
error_handle(status);
}
free(link);
}
}
void
Init_eval()
{
init = rb_intern("initialize");
eqq = rb_intern("===");
each = rb_intern("each");
aref = rb_intern("[]");
aset = rb_intern("[]=");
match = rb_intern("=~");
to_ary = rb_intern("to_ary");
missing = rb_intern("method_missing");
added = rb_intern("method_added");
singleton_added = rb_intern("singleton_method_added");
__id__ = rb_intern("__id__");
__send__ = rb_intern("__send__");
rb_global_variable((VALUE*)&top_scope);
rb_global_variable((VALUE*)&ruby_eval_tree_begin);
rb_global_variable((VALUE*)&ruby_eval_tree);
rb_global_variable((VALUE*)&ruby_dyna_vars);
rb_define_virtual_variable("$@", errat_getter, errat_setter);
rb_define_hooked_variable("$!", &ruby_errinfo, 0, errinfo_setter);
rb_define_global_function("eval", rb_f_eval, -1);
rb_define_global_function("iterator?", rb_f_block_given_p, 0);
rb_define_global_function("block_given?", rb_f_block_given_p, 0);
rb_define_global_function("method_missing", rb_f_missing, -1);
rb_define_global_function("loop", rb_f_loop, 0);
rb_define_method(rb_mKernel, "respond_to?", rb_obj_respond_to, -1);
rb_define_global_function("raise", rb_f_raise, -1);
rb_define_global_function("fail", rb_f_raise, -1);
rb_define_global_function("caller", rb_f_caller, -1);
rb_define_global_function("exit", rb_f_exit, -1);
rb_define_global_function("abort", rb_f_abort, 0);
rb_define_global_function("at_exit", rb_f_at_exit, 0);
rb_define_global_function("catch", rb_f_catch, 1);
rb_define_global_function("throw", rb_f_throw, -1);
rb_define_global_function("global_variables", rb_f_global_variables, 0);
rb_define_global_function("local_variables", rb_f_local_variables, 0);
rb_define_method(rb_mKernel, "send", rb_f_send, -1);
rb_define_method(rb_mKernel, "__send__", rb_f_send, -1);
rb_define_method(rb_mKernel, "instance_eval", rb_obj_instance_eval, -1);
rb_define_private_method(rb_cModule, "append_features", rb_mod_append_features, 1);
rb_define_private_method(rb_cModule, "extend_object", rb_mod_extend_object, 1);
rb_define_private_method(rb_cModule, "include", rb_mod_include, -1);
rb_define_private_method(rb_cModule, "public", rb_mod_public, -1);
rb_define_private_method(rb_cModule, "protected", rb_mod_protected, -1);
rb_define_private_method(rb_cModule, "private", rb_mod_private, -1);
rb_define_private_method(rb_cModule, "module_function", rb_mod_modfunc, -1);
rb_define_method(rb_cModule, "method_defined?", rb_mod_method_defined, 1);
rb_define_method(rb_cModule, "public_class_method", rb_mod_public_method, -1);
rb_define_method(rb_cModule, "private_class_method", rb_mod_private_method, -1);
rb_define_method(rb_cModule, "module_eval", rb_mod_module_eval, -1);
rb_define_method(rb_cModule, "class_eval", rb_mod_module_eval, -1);
rb_undef_method(rb_cClass, "module_function");
rb_define_private_method(rb_cModule, "remove_method", rb_mod_remove_method, 1);
rb_define_private_method(rb_cModule, "undef_method", rb_mod_undef_method, 1);
rb_define_private_method(rb_cModule, "alias_method", rb_mod_alias_method, 2);
rb_define_private_method(rb_cModule, "define_method", rb_mod_define_method, -1);
rb_define_singleton_method(rb_cModule, "nesting", rb_mod_nesting, 0);
rb_define_singleton_method(rb_cModule, "constants", rb_mod_s_constants, 0);
rb_define_singleton_method(ruby_top_self, "include", top_include, -1);
rb_define_singleton_method(ruby_top_self, "public", top_public, -1);
rb_define_singleton_method(ruby_top_self, "private", top_private, -1);
rb_define_method(rb_mKernel, "extend", rb_obj_extend, -1);
rb_define_global_function("trace_var", rb_f_trace_var, -1);
rb_define_global_function("untrace_var", rb_f_untrace_var, -1);
rb_define_global_function("set_trace_func", set_trace_func, 1);
rb_global_variable(&trace_func);
rb_define_virtual_variable("$SAFE", safe_getter, safe_setter);
#ifdef HAVE_GETRLIMIT
{
struct rlimit rlim;
if (getrlimit(RLIMIT_STACK, &rlim) == 0) {
double space = (double)rlim.rlim_cur*0.2;
if (space > 1024*1024) space = 1024*1024;
STACK_LEVEL_MAX = (rlim.rlim_cur - space) / sizeof(VALUE);
}
}
#endif
}
VALUE rb_f_autoload();
void
Init_load()
{
rb_load_path = rb_ary_new();
rb_define_readonly_variable("$:", &rb_load_path);
rb_define_readonly_variable("$-I", &rb_load_path);
rb_define_readonly_variable("$LOAD_PATH", &rb_load_path);
rb_features = rb_ary_new();
rb_define_readonly_variable("$\"", &rb_features);
rb_define_global_function("load", rb_f_load, -1);
rb_define_global_function("require", rb_f_require, 1);
rb_define_global_function("autoload", rb_f_autoload, 2);
rb_global_variable(&ruby_wrapper);
}
static void
scope_dup(scope)
struct SCOPE *scope;
{
ID *tbl;
VALUE *vars;
scope->flag |= SCOPE_DONT_RECYCLE;
if (scope->flag & SCOPE_MALLOC) return;
if (scope->local_tbl) {
tbl = scope->local_tbl;
vars = ALLOC_N(VALUE, tbl[0]+1);
*vars++ = scope->local_vars[-1];
MEMCPY(vars, scope->local_vars, VALUE, tbl[0]);
scope->local_vars = vars;
scope->flag |= SCOPE_MALLOC;
}
}
static void
blk_mark(data)
struct BLOCK *data;
{
while (data) {
rb_gc_mark_frame(&data->frame);
rb_gc_mark(data->scope);
rb_gc_mark(data->var);
rb_gc_mark(data->body);
rb_gc_mark(data->self);
rb_gc_mark(data->dyna_vars);
rb_gc_mark(data->klass);
data = data->prev;
}
}
static void
blk_free(data)
struct BLOCK *data;
{
struct FRAME *frame;
void *tmp;
frame = data->frame.prev;
while (frame) {
if (frame->argc > 0 && (frame->flags & FRAME_MALLOC))
free(frame->argv);
tmp = frame;
frame = frame->prev;
free(tmp);
}
while (data) {
if (data->frame.argc > 0)
free(data->frame.argv);
tmp = data;
data = data->prev;
free(tmp);
}
}
static void
blk_copy_prev(block)
struct BLOCK *block;
{
struct BLOCK *tmp;
while (block->prev) {
tmp = ALLOC_N(struct BLOCK, 1);
MEMCPY(tmp, block->prev, struct BLOCK, 1);
if (tmp->frame.argc > 0) {
tmp->frame.argv = ALLOC_N(VALUE, tmp->frame.argc);
MEMCPY(tmp->frame.argv, block->prev->frame.argv, VALUE, tmp->frame.argc);
}
scope_dup(tmp->scope);
block->prev = tmp;
block = tmp;
}
}
static void
frame_dup(frame)
struct FRAME *frame;
{
VALUE *argv;
struct FRAME *tmp;
for (;;) {
if (frame->argc > 0) {
argv = ALLOC_N(VALUE, frame->argc);
MEMCPY(argv, frame->argv, VALUE, frame->argc);
frame->argv = argv;
frame->flags = FRAME_MALLOC;
}
frame->tmp = 0; /* should not preserve tmp */
if (!frame->prev) break;
tmp = ALLOC(struct FRAME);
*tmp = *frame->prev;
frame->prev = tmp;
frame = tmp;
}
}
static VALUE
bind_clone(self)
VALUE self;
{
struct BLOCK *orig, *data;
VALUE bind;
Data_Get_Struct(self, struct BLOCK, orig);
bind = Data_Make_Struct(rb_cBinding,struct BLOCK,blk_mark,blk_free,data);
CLONESETUP(bind, self);
MEMCPY(data, orig, struct BLOCK, 1);
frame_dup(&data->frame);
if (data->iter) {
blk_copy_prev(data);
}
else {
data->prev = 0;
}
return bind;
}
static VALUE
rb_f_binding(self)
VALUE self;
{
struct BLOCK *data;
struct RVarmap *vars;
VALUE bind;
PUSH_BLOCK(0,0);
bind = Data_Make_Struct(rb_cBinding,struct BLOCK,blk_mark,blk_free,data);
*data = *ruby_block;
data->orig_thread = rb_thread_current();
data->iter = rb_f_block_given_p();
frame_dup(&data->frame);
if (ruby_frame->prev) {
data->frame.last_func = ruby_frame->prev->last_func;
data->frame.last_class = ruby_frame->prev->last_class;
}
if (data->iter) {
blk_copy_prev(data);
}
else {
data->prev = 0;
}
for (vars = data->dyna_vars; vars; vars = vars->next) {
if (FL_TEST(vars, DVAR_DONT_RECYCLE)) break;
FL_SET(vars, DVAR_DONT_RECYCLE);
}
scope_dup(data->scope);
POP_BLOCK();
return bind;
}
#define PROC_T3 FL_USER1
#define PROC_T4 FL_USER2
#define PROC_TMAX (FL_USER1|FL_USER2)
#define PROC_TMASK (FL_USER1|FL_USER2)
static void
proc_save_safe_level(data)
VALUE data;
{
if (OBJ_TAINTED(data)) {
switch (rb_safe_level()) {
case 3:
FL_SET(data, PROC_T3);
break;
case 4:
FL_SET(data, PROC_T4);
break;
default:
if (rb_safe_level() > 4) {
FL_SET(data, PROC_TMAX);
}
break;
}
}
}
static void
proc_set_safe_level(data)
VALUE data;
{
if (OBJ_TAINTED(data)) {
switch (RBASIC(data)->flags & PROC_TMASK) {
case PROC_T3:
ruby_safe_level = 3;
break;
case PROC_T4:
ruby_safe_level = 4;
break;
case PROC_TMAX:
ruby_safe_level = 5;
break;
}
}
}
static VALUE
proc_new(klass)
VALUE klass;
{
volatile VALUE proc;
struct BLOCK *data;
struct RVarmap *vars;
if (!rb_block_given_p() && !rb_f_block_given_p()) {
rb_raise(rb_eArgError, "tried to create Procedure-Object without a block");
}
proc = Data_Make_Struct(klass, struct BLOCK, blk_mark, blk_free, data);
*data = *ruby_block;
data->orig_thread = rb_thread_current();
data->iter = data->prev?Qtrue:Qfalse;
data->tag = 0; /* should not point into stack */
frame_dup(&data->frame);
if (data->iter) {
blk_copy_prev(data);
}
else {
data->prev = 0;
}
data->flags |= BLOCK_DYNAMIC;
for (vars = data->dyna_vars; vars; vars = vars->next) {
if (FL_TEST(vars, DVAR_DONT_RECYCLE)) break;
FL_SET(vars, DVAR_DONT_RECYCLE);
}
scope_dup(data->scope);
proc_save_safe_level(proc);
return proc;
}
static VALUE
proc_s_new(argc, argv, klass)
int argc;
VALUE *argv;
VALUE klass;
{
VALUE proc = proc_new(klass);
rb_obj_call_init(proc, argc, argv);
return proc;
}
VALUE
rb_f_lambda()
{
return proc_new(rb_cProc);
}
static int
blk_orphan(data)
struct BLOCK *data;
{
if (data->scope && data->scope != top_scope &&
(data->scope->flag & SCOPE_NOSTACK)) {
return 1;
}
if (data->orig_thread != rb_thread_current()) {
return 1;
}
return 0;
}
static VALUE
callargs(args)
VALUE args;
{
switch (RARRAY(args)->len) {
case 0:
return Qundef;
break;
default:
return args;
}
}
static VALUE
proc_call(proc, args)
VALUE proc, args; /* OK */
{
struct BLOCK * volatile old_block;
struct BLOCK _block;
struct BLOCK *data;
volatile VALUE result = Qnil;
int state;
volatile int orphan;
volatile int safe = ruby_safe_level;
if (rb_block_given_p() && ruby_frame->last_func) {
rb_warning("block for %s#%s is useless",
rb_class2name(CLASS_OF(proc)),
rb_id2name(ruby_frame->last_func));
}
Data_Get_Struct(proc, struct BLOCK, data);
orphan = blk_orphan(data);
/* PUSH BLOCK from data */
old_block = ruby_block;
_block = *data;
ruby_block = &_block;
PUSH_ITER(ITER_CUR);
ruby_frame->iter = ITER_CUR;
if (args != Qundef && TYPE(args) == T_ARRAY) {
args = callargs(args);
}
if (orphan) {/* orphan procedure */
if (rb_block_given_p()) {
ruby_block->frame.iter = ITER_CUR;
}
else {
ruby_block->frame.iter = ITER_NOT;
}
}
PUSH_TAG(PROT_NONE);
_block.tag = prot_tag;
state = EXEC_TAG();
if (state == 0) {
proc_set_safe_level(proc);
result = rb_yield_0(args, 0, 0, Qtrue);
}
POP_TAG();
POP_ITER();
if (ruby_block->tag->dst == state) {
state &= TAG_MASK;
}
ruby_block = old_block;
ruby_safe_level = safe;
if (state) {
switch (state) {
case TAG_BREAK:
break;
case TAG_RETRY:
rb_raise(rb_eLocalJumpError, "retry from proc-closure");
break;
case TAG_RETURN:
if (orphan) { /* orphan procedure */
rb_raise(rb_eLocalJumpError, "return from proc-closure");
}
/* fall through */
default:
JUMP_TAG(state);
}
}
return result;
}
static VALUE
proc_arity(proc)
VALUE proc;
{
struct BLOCK *data;
NODE *list;
int n;
Data_Get_Struct(proc, struct BLOCK, data);
if (data->var == 0) return INT2FIX(-1);
if (data->var == (NODE*)1) return INT2FIX(0);
switch (nd_type(data->var)) {
default:
return INT2FIX(-1);
case NODE_MASGN:
list = data->var->nd_head;
n = 0;
while (list) {
n++;
list = list->nd_next;
}
if (data->var->nd_args) return INT2FIX(-n-1);
return INT2FIX(n);
}
}
static VALUE
block_pass(self, node)
VALUE self;
NODE *node;
{
VALUE block = rb_eval(self, node->nd_body); /* OK */
struct BLOCK * volatile old_block;
struct BLOCK _block;
struct BLOCK *data;
volatile VALUE result = Qnil;
int state;
volatile int orphan;
volatile int safe = ruby_safe_level;
if (NIL_P(block)) {
return rb_eval(self, node->nd_iter);
}
if (rb_obj_is_kind_of(block, rb_cMethod)) {
block = method_proc(block);
}
else if (!rb_obj_is_proc(block)) {
rb_raise(rb_eTypeError, "wrong argument type %s (expected Proc)",
rb_class2name(CLASS_OF(block)));
}
Data_Get_Struct(block, struct BLOCK, data);
orphan = blk_orphan(data);
/* PUSH BLOCK from data */
old_block = ruby_block;
_block = *data;
ruby_block = &_block;
PUSH_ITER(ITER_PRE);
ruby_frame->iter = ITER_PRE;
PUSH_TAG(PROT_NONE);
_block.tag = prot_tag;
state = EXEC_TAG();
if (state == 0) {
proc_set_safe_level(block);
result = rb_eval(self, node->nd_iter);
}
POP_TAG();
POP_ITER();
if (_block.tag->dst == state) {
if (orphan) {
state &= TAG_MASK;
}
else {
struct BLOCK *ptr = old_block;
while (ptr) {
if (ptr->scope == _block.scope) {
ptr->tag->dst = state;
break;
}
ptr = ptr->prev;
}
}
}
ruby_block = old_block;
ruby_safe_level = safe;
if (state) {
switch (state) {/* escape from orphan procedure */
case TAG_BREAK:
rb_raise(rb_eLocalJumpError, "break from proc-closure");
break;
case TAG_RETRY:
rb_raise(rb_eLocalJumpError, "retry from proc-closure");
break;
case TAG_RETURN:
rb_raise(rb_eLocalJumpError, "return from proc-closure");
break;
}
JUMP_TAG(state);
}
return result;
}
struct METHOD {
VALUE klass, oklass;
VALUE recv;
ID id, oid;
NODE *body;
};
static void
bm_mark(data)
struct METHOD *data;
{
rb_gc_mark(data->oklass);
rb_gc_mark(data->klass);
rb_gc_mark(data->recv);
rb_gc_mark(data->body);
}
static VALUE
mnew(klass, obj, id, mklass)
VALUE klass, obj, mklass;
ID id;
{
VALUE method;
NODE *body;
int noex;
struct METHOD *data;
VALUE oklass = klass;
ID oid = id;
again:
if ((body = rb_get_method_body(&klass, &id, &noex)) == 0) {
print_undef(oklass, oid);
}
if (nd_type(body) == NODE_ZSUPER) {
klass = RCLASS(klass)->super;
goto again;
}
method = Data_Make_Struct(mklass, struct METHOD, bm_mark, free, data);
data->klass = klass;
data->recv = obj;
data->id = id;
data->body = body;
data->oklass = oklass;
data->oid = oid;
OBJ_INFECT(method, klass);
return method;
}
static VALUE
method_unbind(obj)
VALUE obj;
{
VALUE method;
struct METHOD *orig, *data;
Data_Get_Struct(obj, struct METHOD, orig);
method = Data_Make_Struct(rb_cUnboundMethod, struct METHOD, bm_mark, free, data);
data->klass = orig->klass;
data->recv = obj;
data->id = orig->id;
data->body = orig->body;
data->oklass = orig->oklass;
data->oid = orig->oid;
OBJ_INFECT(method, obj);
return method;
}
static VALUE
umethod_unbind(obj)
VALUE obj;
{
return obj;
}
static VALUE
rb_obj_method(obj, vid)
VALUE obj;
VALUE vid;
{
return mnew(CLASS_OF(obj), obj, rb_to_id(vid), rb_cMethod);
}
static VALUE
rb_mod_method(mod, vid)
VALUE mod;
VALUE vid;
{
return mnew(mod, 0, rb_to_id(vid), rb_cUnboundMethod);
}
static VALUE
method_clone(self)
VALUE self;
{
VALUE clone;
struct METHOD *orig, *data;
Data_Get_Struct(self, struct METHOD, orig);
clone = Data_Make_Struct(CLASS_OF(self),struct METHOD,bm_mark,free,data);
CLONESETUP(clone, self);
*data = *orig;
return clone;
}
static VALUE
method_call(argc, argv, method)
int argc;
VALUE *argv;
VALUE method;
{
VALUE result;
struct METHOD *data;
int state;
volatile int safe = ruby_safe_level;
Data_Get_Struct(method, struct METHOD, data);
PUSH_ITER(rb_block_given_p()?ITER_PRE:ITER_NOT);
PUSH_TAG(PROT_NONE);
if (OBJ_TAINTED(method)) {
if (ruby_safe_level < 4) ruby_safe_level = 4;
}
if ((state = EXEC_TAG()) == 0) {
result = rb_call0(data->klass,data->recv,data->id,argc,argv,data->body,0);
}
POP_TAG();
POP_ITER();
ruby_safe_level = safe;
if (state) JUMP_TAG(state);
return result;
}
static VALUE
umethod_call(argc, argv, method)
int argc;
VALUE *argv;
VALUE method;
{
rb_raise(rb_eTypeError, "you cannot call unbound method; bind first");
return Qnil; /* not reached */
}
static VALUE
umethod_bind(method, recv)
VALUE method, recv;
{
struct METHOD *data, *bound;
Data_Get_Struct(method, struct METHOD, data);
if (data->oklass != CLASS_OF(recv)) {
if (FL_TEST(data->oklass, FL_SINGLETON)) {
rb_raise(rb_eTypeError, "singleton method called for a different object");
}
if (FL_TEST(CLASS_OF(recv), FL_SINGLETON) &&
st_lookup(RCLASS(CLASS_OF(recv))->m_tbl, data->oid, 0)) {
rb_raise(rb_eTypeError, "method `%s' overridden", rb_id2name(data->oid));
}
if (!rb_obj_is_instance_of(recv, data->oklass)) {
rb_raise(rb_eTypeError, "first argument must be an instance of %s",
rb_class2name(data->oklass));
}
}
method = Data_Make_Struct(rb_cMethod,struct METHOD,bm_mark,free,bound);
*bound = *data;
bound->recv = recv;
return method;
}
static VALUE
method_arity(method)
VALUE method;
{
struct METHOD *data;
NODE *body;
int n;
Data_Get_Struct(method, struct METHOD, data);
body = data->body;
switch (nd_type(body)) {
case NODE_CFUNC:
if (body->nd_argc < 0) return INT2FIX(-1);
return INT2FIX(body->nd_argc);
case NODE_ZSUPER:
return INT2FIX(-1);
case NODE_ATTRSET:
return INT2FIX(1);
case NODE_IVAR:
return INT2FIX(0);
default:
body = body->nd_next; /* skip NODE_SCOPE */
if (nd_type(body) == NODE_BLOCK)
body = body->nd_head;
if (!body) return INT2FIX(0);
n = body->nd_cnt;
if (body->nd_opt || body->nd_rest != -1)
n = -n-1;
return INT2FIX(n);
}
}
static VALUE
method_inspect(method)
VALUE method;
{
struct METHOD *data;
VALUE str;
const char *s;
Data_Get_Struct(method, struct METHOD, data);
str = rb_str_new2("#<");
s = rb_class2name(CLASS_OF(method));
rb_str_cat2(str, s);
rb_str_cat2(str, ": ");
s = rb_class2name(data->oklass);
rb_str_cat2(str, s);
rb_str_cat2(str, "(");
s = rb_class2name(data->klass);
rb_str_cat2(str, s);
rb_str_cat2(str, ")#");
s = rb_id2name(data->oid);
rb_str_cat2(str, s);
rb_str_cat2(str, ">");
return str;
}
static VALUE
mproc()
{
VALUE proc;
/* emulate ruby's method call */
PUSH_ITER(ITER_CUR);
PUSH_FRAME();
proc = rb_f_lambda();
POP_FRAME();
POP_ITER();
return proc;
}
static VALUE
bmcall(args, method)
VALUE args, method;
{
if (TYPE(args) == T_ARRAY) {
return method_call(RARRAY(args)->len, RARRAY(args)->ptr, method);
}
return method_call(1, &args, method);
}
static VALUE
umcall(args, method)
VALUE args, method;
{
if (TYPE(args) == T_ARRAY) {
return umethod_call(RARRAY(args)->len, RARRAY(args)->ptr, method);
}
return umethod_call(1, &args, method);
}
static VALUE
method_proc(method)
VALUE method;
{
return rb_iterate(mproc, 0, bmcall, method);
}
static VALUE
umethod_proc(method)
VALUE method;
{
return rb_iterate(mproc, 0, umcall, method);
}
static VALUE
rb_mod_define_method(argc, argv, mod)
int argc;
VALUE *argv;
VALUE mod;
{
ID id;
VALUE name, body;
if (argc == 1) {
id = rb_to_id(argv[0]);
body = rb_f_lambda();
}
else if (argc == 2) {
id = rb_to_id(argv[0]);
body = argv[1];
}
else {
rb_raise(rb_eArgError, "wrong # of arguments(%d for 1)", argc);
}
if (TYPE(body) != T_DATA) {
/* type error */
}
if (RDATA(body)->dmark == (RUBY_DATA_FUNC)bm_mark) {
rb_add_method(mod, id, NEW_DMETHOD(method_unbind(body)), NOEX_PUBLIC);
}
else if (RDATA(body)->dmark != (RUBY_DATA_FUNC)blk_mark) {
rb_add_method(mod, id, NEW_BMETHOD(body), NOEX_PUBLIC);
}
else {
/* type error */
}
return body;
}
void
Init_Proc()
{
rb_eLocalJumpError = rb_define_class("LocalJumpError", rb_eStandardError);
rb_eSysStackError = rb_define_class("SystemStackError", rb_eStandardError);
rb_cProc = rb_define_class("Proc", rb_cObject);
rb_define_singleton_method(rb_cProc, "new", proc_s_new, -1);
rb_define_method(rb_cProc, "call", proc_call, -2);
rb_define_method(rb_cProc, "arity", proc_arity, 0);
rb_define_method(rb_cProc, "[]", proc_call, -2);
rb_define_global_function("proc", rb_f_lambda, 0);
rb_define_global_function("lambda", rb_f_lambda, 0);
rb_define_global_function("binding", rb_f_binding, 0);
rb_cBinding = rb_define_class("Binding", rb_cObject);
rb_undef_method(CLASS_OF(rb_cBinding), "new");
rb_define_method(rb_cBinding, "clone", bind_clone, 0);
rb_cMethod = rb_define_class("Method", rb_cObject);
rb_undef_method(CLASS_OF(rb_cMethod), "new");
rb_define_method(rb_cMethod, "clone", method_clone, 0);
rb_define_method(rb_cMethod, "call", method_call, -1);
rb_define_method(rb_cMethod, "[]", method_call, -1);
rb_define_method(rb_cMethod, "arity", method_arity, 0);
rb_define_method(rb_cMethod, "inspect", method_inspect, 0);
rb_define_method(rb_cMethod, "to_s", method_inspect, 0);
rb_define_method(rb_cMethod, "to_proc", method_proc, 0);
rb_define_method(rb_cMethod, "unbind", method_unbind, 0);
rb_define_method(rb_mKernel, "method", rb_obj_method, 1);
rb_cUnboundMethod = rb_define_class("UnboundMethod", rb_cMethod);
rb_define_method(rb_cUnboundMethod, "call", umethod_call, -1);
rb_define_method(rb_cUnboundMethod, "[]", umethod_call, -1);
rb_define_method(rb_cUnboundMethod, "to_proc", umethod_proc, 0);
rb_define_method(rb_cUnboundMethod, "bind", umethod_bind, 1);
rb_define_method(rb_cUnboundMethod, "unbind", umethod_unbind, 0);
rb_define_method(rb_cModule, "instance_method", rb_mod_method, 1);
}
static VALUE rb_eThreadError;
int rb_thread_pending = 0;
VALUE rb_cThread;
extern VALUE rb_last_status;
enum thread_status {
THREAD_TO_KILL,
THREAD_RUNNABLE,
THREAD_STOPPED,
THREAD_KILLED
};
#define WAIT_FD (1<<0)
#define WAIT_SELECT (1<<1)
#define WAIT_TIME (1<<2)
#define WAIT_JOIN (1<<3)
#define WAIT_PID (1<<4)
/* +infty, for this purpose */
#define DELAY_INFTY 1E30
/* typedef struct thread * rb_thread_t; */
struct thread {
struct thread *next, *prev;
jmp_buf context;
VALUE result;
int stk_len;
int stk_max;
VALUE*stk_ptr;
VALUE*stk_pos;
struct FRAME *frame;
struct SCOPE *scope;
struct RVarmap *dyna_vars;
struct BLOCK *block;
struct iter *iter;
struct tag *tag;
VALUE klass;
VALUE wrapper;
int flags; /* misc. states (vmode/rb_trap_immediate/raised) */
char *file;
int line;
int tracing;
VALUE errinfo;
VALUE last_status;
VALUE last_line;
VALUE last_match;
int safe;
enum thread_status status;
int wait_for;
int fd;
fd_set readfds;
fd_set writefds;
fd_set exceptfds;
int select_value;
double delay;
rb_thread_t join;
int abort;
int priority;
int gid;
st_table *locals;
VALUE thread;
};
#define THREAD_RAISED 0x200
#define FOREACH_THREAD_FROM(f,x) x = f; do { x = x->next;
#define END_FOREACH_FROM(f,x) } while (x != f)
#define FOREACH_THREAD(x) FOREACH_THREAD_FROM(curr_thread,x)
#define END_FOREACH(x) END_FOREACH_FROM(curr_thread,x)
/* Return the current time as a floating-point number */
static double
timeofday()
{
struct timeval tv;
gettimeofday(&tv, NULL);
return (double)tv.tv_sec + (double)tv.tv_usec * 1e-6;
}
#define STACK(addr) (th->stk_pos<(VALUE*)(addr) && (VALUE*)(addr)<th->stk_pos+th->stk_len)
#define ADJ(addr) (void*)(STACK(addr)?(((VALUE*)(addr)-th->stk_pos)+th->stk_ptr):(VALUE*)(addr))
static void
thread_mark(th)
rb_thread_t th;
{
struct FRAME *frame;
struct BLOCK *block;
rb_gc_mark(th->result);
rb_gc_mark(th->thread);
if (th->join) rb_gc_mark(th->join->thread);
rb_gc_mark(th->klass);
rb_gc_mark(th->wrapper);
rb_gc_mark(th->scope);
rb_gc_mark(th->dyna_vars);
rb_gc_mark(th->errinfo);
rb_gc_mark(th->last_line);
rb_gc_mark(th->last_match);
rb_mark_tbl(th->locals);
/* mark data in copied stack */
if (th == curr_thread) return;
if (th->status == THREAD_KILLED) return;
if (th->stk_len == 0) return; /* stack not active, no need to mark. */
if (th->stk_ptr) {
rb_gc_mark_locations(th->stk_ptr, th->stk_ptr+th->stk_len);
#if defined(THINK_C) || defined(__human68k__)
rb_gc_mark_locations(th->stk_ptr+2, th->stk_ptr+th->stk_len+2);
#endif
}
frame = th->frame;
while (frame && frame != top_frame) {
frame = ADJ(frame);
rb_gc_mark_frame(frame);
if (frame->tmp) {
struct FRAME *tmp = frame->tmp;
while (tmp && tmp != top_frame) {
tmp = ADJ(tmp);
rb_gc_mark_frame(tmp);
tmp = tmp->prev;
}
}
frame = frame->prev;
}
block = th->block;
while (block) {
block = ADJ(block);
rb_gc_mark_frame(&block->frame);
block = block->prev;
}
}
void
rb_gc_mark_threads()
{
rb_thread_t th;
if (!curr_thread) return;
FOREACH_THREAD(th) {
rb_gc_mark(th->thread);
} END_FOREACH(th);
}
static void
thread_free(th)
rb_thread_t th;
{
if (th->stk_ptr) free(th->stk_ptr);
th->stk_ptr = 0;
if (th->locals) st_free_table(th->locals);
if (th->status != THREAD_KILLED) {
if (th->prev) th->prev->next = th->next;
if (th->next) th->next->prev = th->prev;
}
if (th != main_thread) free(th);
}
static rb_thread_t
rb_thread_check(data)
VALUE data;
{
if (TYPE(data) != T_DATA || RDATA(data)->dfree != (RUBY_DATA_FUNC)thread_free) {
rb_raise(rb_eTypeError, "wrong argument type %s (expected Thread)",
rb_class2name(CLASS_OF(data)));
}
return (rb_thread_t)RDATA(data)->data;
}
static int th_raise_argc;
static VALUE th_raise_argv[2];
static char *th_raise_file;
static int th_raise_line;
static VALUE th_cmd;
static int th_sig;
static char *th_signm;
#define RESTORE_NORMAL 1
#define RESTORE_FATAL 2
#define RESTORE_INTERRUPT 3
#define RESTORE_TRAP 4
#define RESTORE_RAISE 5
#define RESTORE_SIGNAL 6
static void
rb_thread_save_context(th)
rb_thread_t th;
{
VALUE *pos;
int len;
len = stack_length(&pos);
th->stk_len = 0;
th->stk_pos = (rb_gc_stack_start<pos)?rb_gc_stack_start
:rb_gc_stack_start - len;
if (len > th->stk_max) {
REALLOC_N(th->stk_ptr, VALUE, len);
th->stk_max = len;
}
th->stk_len = len;
FLUSH_REGISTER_WINDOWS;
MEMCPY(th->stk_ptr, th->stk_pos, VALUE, th->stk_len);
th->frame = ruby_frame;
th->scope = ruby_scope;
th->klass = ruby_class;
th->wrapper = ruby_wrapper;
th->dyna_vars = ruby_dyna_vars;
th->block = ruby_block;
th->flags = scope_vmode | (rb_trap_immediate<<8);
th->iter = ruby_iter;
th->tag = prot_tag;
th->tracing = tracing;
th->errinfo = ruby_errinfo;
th->last_status = rb_last_status;
th->last_line = rb_lastline_get();
th->last_match = rb_backref_get();
th->safe = ruby_safe_level;
th->file = ruby_sourcefile;
th->line = ruby_sourceline;
}
static int
thread_switch(n)
int n;
{
switch (n) {
case 0:
return 0;
case RESTORE_FATAL:
JUMP_TAG(TAG_FATAL);
break;
case RESTORE_INTERRUPT:
rb_interrupt();
break;
case RESTORE_TRAP:
rb_trap_eval(th_cmd, th_sig);
errno = EINTR;
break;
case RESTORE_RAISE:
ruby_frame->last_func = 0;
ruby_sourcefile = th_raise_file;
ruby_sourceline = th_raise_line;
rb_f_raise(th_raise_argc, th_raise_argv);
break;
case RESTORE_SIGNAL:
rb_raise(rb_eSignal, "SIG%s", th_signm);
break;
case RESTORE_NORMAL:
default:
break;
}
return 1;
}
#define THREAD_SAVE_CONTEXT(th) \
(rb_thread_save_context(th),thread_switch(setjmp((th)->context)))
static void rb_thread_restore_context _((rb_thread_t,int));
static void
stack_extend(th, exit)
rb_thread_t th;
int exit;
{
VALUE space[1024];
memset(space, 0, 1); /* prevent array from optimization */
rb_thread_restore_context(th, exit);
}
static void
rb_thread_restore_context(th, exit)
rb_thread_t th;
int exit;
{
VALUE v;
static rb_thread_t tmp;
static int ex;
if (!th->stk_ptr) rb_bug("unsaved context");
if (&v < rb_gc_stack_start) {
/* Stack grows downward */
if (&v > th->stk_pos) stack_extend(th, exit);
}
else {
/* Stack grows upward */
if (&v < th->stk_pos + th->stk_len) stack_extend(th, exit);
}
ruby_frame = th->frame;
ruby_scope = th->scope;
ruby_class = th->klass;
ruby_wrapper = th->wrapper;
ruby_dyna_vars = th->dyna_vars;
ruby_block = th->block;
scope_vmode = th->flags&SCOPE_MASK;
rb_trap_immediate = (th->flags&0x100)?1:0;
ruby_iter = th->iter;
prot_tag = th->tag;
tracing = th->tracing;
ruby_errinfo = th->errinfo;
rb_last_status = th->last_status;
ruby_safe_level = th->safe;
ruby_sourcefile = th->file;
ruby_sourceline = th->line;
tmp = th;
ex = exit;
FLUSH_REGISTER_WINDOWS;
MEMCPY(tmp->stk_pos, tmp->stk_ptr, VALUE, tmp->stk_len);
rb_lastline_set(tmp->last_line);
rb_backref_set(tmp->last_match);
longjmp(tmp->context, ex);
}
static void
rb_thread_ready(th)
rb_thread_t th;
{
th->wait_for = 0;
th->status = THREAD_RUNNABLE;
}
static void
rb_thread_remove(th)
rb_thread_t th;
{
if (th->status == THREAD_KILLED) return;
rb_thread_ready(th);
th->status = THREAD_KILLED;
th->prev->next = th->next;
th->next->prev = th->prev;
}
static int
rb_thread_dead(th)
rb_thread_t th;
{
return th->status == THREAD_KILLED;
}
void
rb_thread_fd_close(fd)
int fd;
{
rb_thread_t th;
FOREACH_THREAD(th) {
if ((th->wait_for & WAIT_FD) && fd == th->fd) {
th_raise_argc = 1;
th_raise_argv[0] = rb_exc_new2(rb_eIOError, "stream closed");
th_raise_file = ruby_sourcefile;
th_raise_line = ruby_sourceline;
curr_thread = th;
rb_thread_ready(th);
rb_thread_restore_context(curr_thread, RESTORE_RAISE);
}
}
END_FOREACH(th);
}
static void
rb_thread_deadlock()
{
if (curr_thread == main_thread) {
rb_raise(rb_eFatal, "Thread: deadlock");
}
curr_thread = main_thread;
th_raise_argc = 1;
th_raise_argv[0] = rb_exc_new2(rb_eFatal, "Thread: deadlock");
th_raise_file = ruby_sourcefile;
th_raise_line = ruby_sourceline;
rb_thread_restore_context(main_thread, RESTORE_RAISE);
}
static void
copy_fds(dst, src, max)
fd_set *dst, *src;
int max;
{
int n = 0;
int i;
for (i=0; i<=max; i++) {
if (FD_ISSET(i, src)) {
n = i;
FD_SET(i, dst);
}
}
}
static int
match_fds(dst, src, max)
fd_set *dst, *src;
int max;
{
int i;
for (i=0; i<=max; i++) {
if (FD_ISSET(i, src) && FD_ISSET(i, dst)) {
return Qtrue;
}
}
return Qfalse;
}
static void
intersect_fds(src, dst, max)
fd_set *src, *dst;
int max;
{
int i;
for (i=0; i<=max; i++) {
if (FD_ISSET(i, dst)) {
if (FD_ISSET(i, src)) {
/* Wake up only one thread per fd. */
FD_CLR(i, src);
}
else {
FD_CLR(i, dst);
}
}
}
}
static int
find_bad_fds(dst, src, max)
fd_set *dst, *src;
int max;
{
int i, test = Qfalse;
for (i=0; i<=max; i++) {
if (FD_ISSET(i, src) && !FD_ISSET(i, dst)) {
FD_CLR(i, src);
test = Qtrue;
}
}
return test;
}
void
rb_thread_schedule()
{
rb_thread_t next; /* OK */
rb_thread_t th;
rb_thread_t curr;
int found = 0;
fd_set readfds;
fd_set writefds;
fd_set exceptfds;
struct timeval delay_tv, *delay_ptr;
double delay, now; /* OK */
int n, max;
int need_select = 0;
rb_thread_pending = 0;
if (curr_thread == curr_thread->next
&& curr_thread->status == THREAD_RUNNABLE)
return;
next = 0;
curr = curr_thread; /* starting thread */
while (curr->status == THREAD_KILLED) {
curr = curr->prev;
}
again:
max = 0;
FD_ZERO(&readfds);
FD_ZERO(&writefds);
FD_ZERO(&exceptfds);
delay = DELAY_INFTY;
now = -1.0;
FOREACH_THREAD_FROM(curr, th) {
if (!found && th->status <= THREAD_RUNNABLE) {
found = 1;
}
if (th->status != THREAD_STOPPED) continue;
if (th->wait_for & WAIT_JOIN) {
if (rb_thread_dead(th->join)) {
th->status = THREAD_RUNNABLE;
found = 1;
}
}
if (th->wait_for & WAIT_FD) {
FD_SET(th->fd, &readfds);
if (max < th->fd) max = th->fd;
need_select = 1;
}
if (th->wait_for & WAIT_SELECT) {
copy_fds(&readfds, &th->readfds, th->fd);
copy_fds(&writefds, &th->writefds, th->fd);
copy_fds(&exceptfds, &th->exceptfds, th->fd);
if (max < th->fd) max = th->fd;
need_select = 1;
th->select_value = 0;
}
if (th->wait_for & WAIT_TIME) {
double th_delay;
if (now < 0.0) now = timeofday();
th_delay = th->delay - now;
if (th_delay <= 0.0) {
th->status = THREAD_RUNNABLE;
found = 1;
} else if (th_delay < delay) {
delay = th_delay;
need_select = 1;
}
}
}
END_FOREACH_FROM(curr, th);
/* Do the select if needed */
if (need_select) {
/* Convert delay to a timeval */
/* If a thread is runnable, just poll */
if (found) {
delay_tv.tv_sec = 0;
delay_tv.tv_usec = 0;
delay_ptr = &delay_tv;
}
else if (delay == DELAY_INFTY) {
delay_ptr = 0;
}
else {
delay_tv.tv_sec = delay;
delay_tv.tv_usec = (delay - (double)delay_tv.tv_sec)*1e6;
delay_ptr = &delay_tv;
}
n = select(max+1, &readfds, &writefds, &exceptfds, delay_ptr);
if (n < 0) {
if (rb_trap_pending) rb_trap_exec();
if (errno == EINTR) goto again;
FOREACH_THREAD_FROM(curr, th) {
if (th->wait_for & WAIT_SELECT) {
int v = 0;
v |= find_bad_fds(&readfds, &th->readfds, th->fd);
v |= find_bad_fds(&writefds, &th->writefds, th->fd);
v |= find_bad_fds(&exceptfds, &th->exceptfds, th->fd);
if (v) {
th->select_value = n;
n = max;
}
}
}
END_FOREACH_FROM(curr, th);
}
if (n > 0) {
now = -1.0;
/* Some descriptors are ready.
Make the corresponding threads runnable. */
FOREACH_THREAD_FROM(curr, th) {
if ((th->wait_for&WAIT_FD) && FD_ISSET(th->fd, &readfds)) {
/* Wake up only one thread per fd. */
FD_CLR(th->fd, &readfds);
th->status = THREAD_RUNNABLE;
th->fd = 0;
th->wait_for = 0;
found = 1;
}
if ((th->wait_for&WAIT_SELECT) &&
(match_fds(&readfds, &th->readfds, max) ||
match_fds(&writefds, &th->writefds, max) ||
match_fds(&exceptfds, &th->exceptfds, max))) {
/* Wake up only one thread per fd. */
th->status = THREAD_RUNNABLE;
th->wait_for = 0;
intersect_fds(&readfds, &th->readfds, max);
intersect_fds(&writefds, &th->writefds, max);
intersect_fds(&exceptfds, &th->exceptfds, max);
th->select_value = n;
found = 1;
}
}
END_FOREACH_FROM(curr, th);
}
/* The delays for some of the threads should have expired.
Go through the loop once more, to check the delays. */
if (!found && delay != DELAY_INFTY)
goto again;
}
FOREACH_THREAD_FROM(curr, th) {
if (th->status == THREAD_TO_KILL) {
next = th;
break;
}
if (th->status == THREAD_RUNNABLE) {
if (!next || next->priority < th->priority)
next = th;
}
}
END_FOREACH_FROM(curr, th);
if (!next) {
/* raise fatal error to main thread */
curr_thread->file = ruby_sourcefile;
curr_thread->line = ruby_sourceline;
FOREACH_THREAD_FROM(curr, th) {
fprintf(stderr, "deadlock 0x%lx: %d:%d %s - %s:%d\n",
th->thread, th->status,
th->wait_for, th==main_thread?"(main)":"",
th->file, th->line);
}
END_FOREACH_FROM(curr, th);
next = main_thread;
next->gid = 0;
rb_thread_ready(next);
next->status = THREAD_TO_KILL;
rb_thread_deadlock();
}
next->wait_for = 0;
if (next->status == THREAD_RUNNABLE && next == curr_thread) {
return;
}
/* context switch */
if (curr == curr_thread) {
if (THREAD_SAVE_CONTEXT(curr)) {
return;
}
}
curr_thread = next;
if (next->status == THREAD_TO_KILL) {
/* execute ensure-clause if any */
rb_thread_restore_context(next, RESTORE_FATAL);
}
rb_thread_restore_context(next, RESTORE_NORMAL);
}
void
rb_thread_wait_fd(fd)
int fd;
{
if (curr_thread == curr_thread->next) return;
if (curr_thread->status == THREAD_TO_KILL) return;
curr_thread->status = THREAD_STOPPED;
curr_thread->fd = fd;
curr_thread->wait_for = WAIT_FD;
rb_thread_schedule();
}
int
rb_thread_fd_writable(fd)
int fd;
{
if (curr_thread == curr_thread->next) return Qtrue;
if (curr_thread->status == THREAD_TO_KILL) return Qtrue;
curr_thread->status = THREAD_STOPPED;
FD_ZERO(&curr_thread->readfds);
FD_ZERO(&curr_thread->writefds);
FD_SET(fd, &curr_thread->writefds);
FD_ZERO(&curr_thread->exceptfds);
curr_thread->fd = fd+1;
curr_thread->wait_for = WAIT_SELECT;
rb_thread_schedule();
return Qfalse;
}
void
rb_thread_wait_for(time)
struct timeval time;
{
double date;
if (curr_thread == curr_thread->next ||
curr_thread->status == THREAD_TO_KILL) {
int n;
#ifndef linux
double d, limit;
limit = timeofday()+(double)time.tv_sec+(double)time.tv_usec*1e-6;
#endif
for (;;) {
TRAP_BEG;
n = select(0, 0, 0, 0, &time);
TRAP_END;
if (n == 0) return;
#ifndef linux
d = limit - timeofday();
time.tv_sec = (int)d;
time.tv_usec = (int)((d - (int)d)*1e6);
if (time.tv_usec < 0) {
time.tv_usec += (long)1e6;
time.tv_sec -= 1;
}
if (time.tv_sec < 0) return;
#endif
}
}
date = timeofday() + (double)time.tv_sec + (double)time.tv_usec*1e-6;
curr_thread->status = THREAD_STOPPED;
curr_thread->delay = date;
curr_thread->wait_for = WAIT_TIME;
rb_thread_schedule();
}
void rb_thread_sleep_forever _((void));
int
rb_thread_alone()
{
return curr_thread == curr_thread->next;
}
int
rb_thread_select(max, read, write, except, timeout)
int max;
fd_set *read, *write, *except;
struct timeval *timeout;
{
double limit;
int n;
if (!read && !write && !except) {
if (!timeout) {
rb_thread_sleep_forever();
return 0;
}
rb_thread_wait_for(*timeout);
return 0;
}
if (timeout) {
limit = timeofday()+
(double)timeout->tv_sec+(double)timeout->tv_usec*1e-6;
}
if (curr_thread == curr_thread->next ||
curr_thread->status == THREAD_TO_KILL) {
#ifndef linux
struct timeval tv, *tvp = timeout;
if (timeout) {
tv = *timeout;
tvp = &tv;
}
for (;;) {
TRAP_BEG;
n = select(max, read, write, except, tvp);
TRAP_END;
if (n < 0 && errno == EINTR) {
if (timeout) {
double d = timeofday() - limit;
tv.tv_sec = (unsigned int)d;
tv.tv_usec = (long)((d-(double)tv.tv_sec)*1e6);
}
continue;
}
return n;
}
#else
for (;;) {
TRAP_BEG;
n = select(max, read, write, except, timeout);
TRAP_END;
if (n < 0 && errno == EINTR) {
continue;
}
return n;
}
#endif
}
curr_thread->status = THREAD_STOPPED;
if (read) curr_thread->readfds = *read;
else FD_ZERO(&curr_thread->readfds);
if (write) curr_thread->writefds = *write;
else FD_ZERO(&curr_thread->writefds);
if (except) curr_thread->exceptfds = *except;
else FD_ZERO(&curr_thread->exceptfds);
curr_thread->fd = max;
curr_thread->wait_for = WAIT_SELECT;
if (timeout) {
curr_thread->delay = timeofday() +
(double)timeout->tv_sec + (double)timeout->tv_usec*1e-6;
curr_thread->wait_for |= WAIT_TIME;
}
rb_thread_schedule();
if (read) *read = curr_thread->readfds;
if (write) *write = curr_thread->writefds;
if (except) *except = curr_thread->exceptfds;
return curr_thread->select_value;
}
static VALUE
rb_thread_join(thread)
VALUE thread;
{
rb_thread_t th = rb_thread_check(thread);
enum thread_status last_status = THREAD_RUNNABLE;
if (!rb_thread_dead(th)) {
if (th == curr_thread)
rb_raise(rb_eThreadError, "thread tried to join itself");
if ((th->wait_for & WAIT_JOIN) && th->join == curr_thread)
rb_raise(rb_eThreadError, "Thread#join: deadlock - mutual join");
if (curr_thread->status == THREAD_TO_KILL)
last_status = THREAD_TO_KILL;
curr_thread->status = THREAD_STOPPED;
curr_thread->join = th;
curr_thread->wait_for = WAIT_JOIN;
rb_thread_schedule();
curr_thread->status = last_status;
}
if (!NIL_P(th->errinfo) && (th->flags & THREAD_RAISED)) {
VALUE oldbt = get_backtrace(th->errinfo);
VALUE errat = make_backtrace();
if (TYPE(oldbt) == T_ARRAY && RARRAY(oldbt)->len > 0) {
rb_ary_unshift(errat, rb_ary_entry(oldbt, 0));
}
set_backtrace(th->errinfo, errat);
rb_exc_raise(th->errinfo);
}
return thread;
}
VALUE
rb_thread_current()
{
return curr_thread->thread;
}
VALUE
rb_thread_main()
{
return main_thread->thread;
}
VALUE
rb_thread_list()
{
rb_thread_t th;
VALUE ary = rb_ary_new();
FOREACH_THREAD(th) {
switch (th->status) {
case THREAD_RUNNABLE:
case THREAD_STOPPED:
rb_ary_push(ary, th->thread);
default:
break;
}
}
END_FOREACH(th);
return ary;
}
VALUE
rb_thread_wakeup(thread)
VALUE thread;
{
rb_thread_t th = rb_thread_check(thread);
if (th->status == THREAD_KILLED)
rb_raise(rb_eThreadError, "killed thread");
rb_thread_ready(th);
return thread;
}
VALUE
rb_thread_run(thread)
VALUE thread;
{
rb_thread_wakeup(thread);
if (!rb_thread_critical) rb_thread_schedule();
return thread;
}
static VALUE
rb_thread_kill(thread)
VALUE thread;
{
rb_thread_t th = rb_thread_check(thread);
if (th != curr_thread && th->safe < 4) {
rb_secure(4);
}
if (th->status == THREAD_TO_KILL || th->status == THREAD_KILLED)
return thread;
if (th == th->next || th == main_thread) rb_exit(0);
rb_thread_ready(th);
th->gid = 0;
th->status = THREAD_TO_KILL;
rb_thread_schedule();
return Qnil; /* not reached */
}
static VALUE
rb_thread_s_kill(obj, th)
VALUE obj, th;
{
return rb_thread_kill(th);
}
static VALUE
rb_thread_exit()
{
return rb_thread_kill(curr_thread->thread);
}
static VALUE
rb_thread_pass()
{
rb_thread_schedule();
return Qnil;
}
VALUE
rb_thread_stop()
{
enum thread_status last_status = THREAD_RUNNABLE;
rb_thread_critical = 0;
if (curr_thread == curr_thread->next) {
rb_raise(rb_eThreadError, "stopping only thread\n\tnote: use sleep to stop forever");
}
if (curr_thread->status == THREAD_TO_KILL)
last_status = THREAD_TO_KILL;
curr_thread->status = THREAD_STOPPED;
rb_thread_schedule();
curr_thread->status = last_status;
return Qnil;
}
struct timeval rb_time_timeval();
void
rb_thread_polling()
{
if (curr_thread != curr_thread->next) {
curr_thread->status = THREAD_STOPPED;
curr_thread->delay = timeofday() + (double)0.06;
curr_thread->wait_for = WAIT_TIME;
rb_thread_schedule();
}
}
void
rb_thread_sleep(sec)
int sec;
{
if (curr_thread == curr_thread->next) {
TRAP_BEG;
sleep(sec);
TRAP_END;
return;
}
rb_thread_wait_for(rb_time_timeval(INT2FIX(sec)));
}
#if !defined HAVE_PAUSE
# if defined _WIN32 && !defined __CYGWIN__
# define pause() Sleep(INFINITE)
# else
# define pause() sleep(0x7fffffff)
# endif
#endif
void
rb_thread_sleep_forever()
{
if (curr_thread == curr_thread->next ||
curr_thread->status == THREAD_TO_KILL) {
TRAP_BEG;
pause();
TRAP_END;
return;
}
curr_thread->delay = DELAY_INFTY;
curr_thread->wait_for = WAIT_TIME;
curr_thread->status = THREAD_STOPPED;
rb_thread_schedule();
}
static VALUE
rb_thread_priority(thread)
VALUE thread;
{
return INT2NUM(rb_thread_check(thread)->priority);
}
static VALUE
rb_thread_priority_set(thread, prio)
VALUE thread, prio;
{
rb_thread_t th;
rb_secure(4);
th = rb_thread_check(thread);
th->priority = NUM2INT(prio);
rb_thread_schedule();
return thread;
}
static VALUE
rb_thread_safe_level(thread)
VALUE thread;
{
rb_thread_t th;
th = rb_thread_check(thread);
if (th == curr_thread) {
return INT2NUM(rb_safe_level());
}
return INT2NUM(th->safe);
}
static int thread_abort;
static VALUE
rb_thread_s_abort_exc()
{
return thread_abort?Qtrue:Qfalse;
}
static VALUE
rb_thread_s_abort_exc_set(self, val)
VALUE self, val;
{
rb_secure(4);
thread_abort = RTEST(val);
return val;
}
static VALUE
rb_thread_abort_exc(thread)
VALUE thread;
{
return rb_thread_check(thread)->abort?Qtrue:Qfalse;
}
static VALUE
rb_thread_abort_exc_set(thread, val)
VALUE thread, val;
{
rb_secure(4);
rb_thread_check(thread)->abort = RTEST(val);
return val;
}
#define THREAD_ALLOC(th) do {\
th = ALLOC(struct thread);\
\
th->next = 0;\
th->prev = 0;\
\
th->status = THREAD_RUNNABLE;\
th->result = 0;\
\
th->stk_ptr = 0;\
th->stk_len = 0;\
th->stk_max = 0;\
th->wait_for = 0;\
FD_ZERO(&th->readfds);\
FD_ZERO(&th->writefds);\
FD_ZERO(&th->exceptfds);\
th->delay = 0.0;\
th->join = 0;\
\
th->frame = 0;\
th->scope = 0;\
th->klass = 0;\
th->wrapper = 0;\
th->dyna_vars = ruby_dyna_vars;\
th->block = 0;\
th->iter = 0;\
th->tag = 0;\
th->tracing = 0;\
th->errinfo = Qnil;\
th->last_status = 0;\
th->last_line = 0;\
th->last_match = 0;\
th->abort = 0;\
th->priority = 0;\
th->gid = 1;\
th->locals = 0;\
} while(0)
static rb_thread_t
rb_thread_alloc(klass)
VALUE klass;
{
rb_thread_t th;
struct RVarmap *vars;
THREAD_ALLOC(th);
th->thread = Data_Wrap_Struct(klass, thread_mark, thread_free, th);
for (vars = th->dyna_vars; vars; vars = vars->next) {
if (FL_TEST(vars, DVAR_DONT_RECYCLE)) break;
FL_SET(vars, DVAR_DONT_RECYCLE);
}
return th;
}
#if defined(HAVE_SETITIMER)
static void
catch_timer(sig)
int sig;
{
#if !defined(POSIX_SIGNAL) && !defined(BSD_SIGNAL)
signal(sig, catch_timer);
#endif
if (!rb_thread_critical) {
if (rb_trap_immediate) {
rb_thread_schedule();
}
else rb_thread_pending = 1;
}
}
#else
int rb_thread_tick = THREAD_TICK;
#endif
static VALUE rb_thread_raise _((int, VALUE*, rb_thread_t));
#define SCOPE_SHARED FL_USER1
#if defined(HAVE_SETITIMER)
static int thread_init = 0;
void
rb_thread_start_timer()
{
struct itimerval tval;
if (!thread_init) return;
tval.it_interval.tv_sec = 0;
tval.it_interval.tv_usec = 10000;
tval.it_value = tval.it_interval;
setitimer(ITIMER_VIRTUAL, &tval, NULL);
}
void
rb_thread_stop_timer()
{
struct itimerval tval;
if (!thread_init) return;
tval.it_interval.tv_sec = 0;
tval.it_interval.tv_usec = 0;
tval.it_value = tval.it_interval;
setitimer(ITIMER_VIRTUAL, &tval, NULL);
}
#endif
static VALUE
rb_thread_start_0(fn, arg, th_arg)
VALUE (*fn)();
void *arg;
rb_thread_t th_arg;
{
volatile rb_thread_t th = th_arg;
volatile VALUE thread = th->thread;
enum thread_status status;
int state;
#if defined(HAVE_SETITIMER)
if (!thread_init) {
#ifdef POSIX_SIGNAL
posix_signal(SIGVTALRM, catch_timer);
#else
signal(SIGVTALRM, catch_timer);
#endif
thread_init = 1;
rb_thread_start_timer();
}
#endif
if (ruby_block) { /* should nail down higher scopes */
blk_copy_prev(ruby_block);
}
scope_dup(ruby_scope);
FL_SET(ruby_scope, SCOPE_SHARED);
if (THREAD_SAVE_CONTEXT(curr_thread)) {
return thread;
}
if (!th->next) {
/* merge in thread list */
th->prev = curr_thread;
curr_thread->next->prev = th;
th->next = curr_thread->next;
curr_thread->next = th;
th->priority = curr_thread->priority;
th->gid = curr_thread->gid;
}
PUSH_TAG(PROT_THREAD);
if ((state = EXEC_TAG()) == 0) {
if (THREAD_SAVE_CONTEXT(th) == 0) {
curr_thread = th;
th->result = (*fn)(arg, th);
}
}
POP_TAG();
status = th->status;
if (th == main_thread) ruby_stop(state);
rb_thread_remove(th);
if (state && status != THREAD_TO_KILL && !NIL_P(ruby_errinfo)) {
th->flags |= THREAD_RAISED;
if (state == TAG_FATAL) {
/* fatal error within this thread, need to stop whole script */
main_thread->errinfo = ruby_errinfo;
rb_thread_cleanup();
}
else if (rb_obj_is_kind_of(ruby_errinfo, rb_eSystemExit)) {
if (th->safe >= 4) {
rb_raise(rb_eSecurityError, "Insecure exit at level %d",
ruby_safe_level);
}
/* delegate exception to main_thread */
rb_thread_raise(1, &ruby_errinfo, main_thread);
}
else if (th->safe < 4 &&
(thread_abort || th->abort || RTEST(ruby_debug))) {
VALUE err = rb_exc_new(rb_eSystemExit, 0, 0);
error_print();
/* exit on main_thread */
rb_thread_raise(1, &err, main_thread);
}
else {
th->errinfo = ruby_errinfo;
}
}
rb_thread_schedule();
return 0; /* not reached */
}
VALUE
rb_thread_create(fn, arg)
VALUE (*fn)();
void *arg;
{
return rb_thread_start_0(fn, arg, rb_thread_alloc(rb_cThread));
}
int
rb_thread_scope_shared_p()
{
return FL_TEST(ruby_scope, SCOPE_SHARED);
}
static VALUE
rb_thread_yield(arg, th)
VALUE arg;
rb_thread_t th;
{
scope_dup(ruby_block->scope);
return rb_yield_0(callargs(arg), 0, 0, Qtrue);
}
static VALUE
rb_thread_s_new(argc, argv, klass)
int argc;
VALUE *argv;
VALUE klass;
{
rb_thread_t th = rb_thread_alloc(klass);
volatile VALUE *pos;
pos = th->stk_pos;
rb_obj_call_init(th->thread, argc, argv);
if (th->stk_pos == 0) {
rb_raise(rb_eThreadError, "uninitialized thread - check `%s#initialize'",
rb_class2name(klass));
}
return th->thread;
}
static VALUE
rb_thread_initialize(thread, args)
VALUE thread, args;
{
if (!rb_block_given_p()) {
rb_raise(rb_eThreadError, "must be called with a block");
}
return rb_thread_start_0(rb_thread_yield, args, rb_thread_check(thread));
}
static VALUE
rb_thread_start(klass, args)
VALUE klass, args;
{
rb_thread_t th;
if (!rb_block_given_p()) {
rb_raise(rb_eThreadError, "must be called with a block");
}
return rb_thread_start_0(rb_thread_yield, args, rb_thread_alloc(klass));
}
static VALUE
rb_thread_value(thread)
VALUE thread;
{
rb_thread_t th = rb_thread_check(thread);
rb_thread_join(thread);
return th->result;
}
static VALUE
rb_thread_status(thread)
VALUE thread;
{
rb_thread_t th = rb_thread_check(thread);
if (rb_thread_dead(th)) {
if (!NIL_P(th->errinfo) && (th->flags & THREAD_RAISED))
return Qnil;
return Qfalse;
}
if (th->status == THREAD_STOPPED)
return rb_str_new2("sleep");
return rb_str_new2("run");
}
static VALUE
rb_thread_alive_p(thread)
VALUE thread;
{
rb_thread_t th = rb_thread_check(thread);
if (rb_thread_dead(th)) return Qfalse;
return Qtrue;
}
static VALUE
rb_thread_stop_p(thread)
VALUE thread;
{
rb_thread_t th = rb_thread_check(thread);
if (rb_thread_dead(th)) return Qtrue;
if (th->status == THREAD_STOPPED) return Qtrue;
return Qfalse;
}
static void
rb_thread_wait_other_threads()
{
/* wait other threads to terminate */
while (curr_thread != curr_thread->next) {
rb_thread_schedule();
}
}
static void
rb_thread_cleanup()
{
rb_thread_t th;
while (curr_thread->status == THREAD_KILLED) {
curr_thread = curr_thread->prev;
}
FOREACH_THREAD(th) {
if (th != curr_thread && th->status != THREAD_KILLED) {
rb_thread_ready(th);
th->gid = 0;
th->priority = 0;
th->status = THREAD_TO_KILL;
}
}
END_FOREACH(th);
}
int rb_thread_critical;
static VALUE
rb_thread_critical_get()
{
return rb_thread_critical?Qtrue:Qfalse;
}
static VALUE
rb_thread_critical_set(obj, val)
VALUE obj, val;
{
rb_thread_critical = RTEST(val);
return val;
}
void
rb_thread_interrupt()
{
rb_thread_critical = 0;
rb_thread_ready(main_thread);
if (curr_thread == main_thread) {
rb_interrupt();
}
if (THREAD_SAVE_CONTEXT(curr_thread)) {
return;
}
curr_thread = main_thread;
rb_thread_restore_context(curr_thread, RESTORE_INTERRUPT);
}
void
rb_thread_signal_raise(sig)
char *sig;
{
if (sig == 0) return; /* should not happen */
rb_thread_critical = 0;
if (curr_thread == main_thread) {
rb_thread_ready(curr_thread);
rb_raise(rb_eSignal, "SIG%s", sig);
}
rb_thread_ready(main_thread);
if (THREAD_SAVE_CONTEXT(curr_thread)) {
return;
}
th_signm = sig;
curr_thread = main_thread;
rb_thread_restore_context(curr_thread, RESTORE_SIGNAL);
}
void
rb_thread_trap_eval(cmd, sig)
VALUE cmd;
int sig;
{
#if 0
rb_thread_critical = 0;
if (!rb_thread_dead(curr_thread)) {
rb_thread_ready(curr_thread);
rb_trap_eval(cmd, sig);
return;
}
rb_thread_ready(main_thread);
if (THREAD_SAVE_CONTEXT(curr_thread)) {
return;
}
th_cmd = cmd;
th_sig = sig;
curr_thread = main_thread;
rb_thread_restore_context(curr_thread, RESTORE_TRAP);
#else
rb_thread_critical = 0;
if (!rb_thread_dead(curr_thread)) {
if (THREAD_SAVE_CONTEXT(curr_thread)) {
return;
}
}
rb_thread_ready(main_thread);
th_cmd = cmd;
th_sig = sig;
curr_thread = main_thread;
rb_thread_restore_context(curr_thread, RESTORE_TRAP);
#endif
}
static VALUE
rb_thread_raise(argc, argv, th)
int argc;
VALUE *argv;
rb_thread_t th;
{
if (rb_thread_dead(th)) return Qnil;
if (curr_thread == th) {
rb_f_raise(argc, argv);
}
if (THREAD_SAVE_CONTEXT(curr_thread)) {
return th->thread;
}
rb_scan_args(argc, argv, "11", &th_raise_argv[0], &th_raise_argv[1]);
rb_thread_ready(th);
curr_thread = th;
th_raise_argc = argc;
th_raise_file = ruby_sourcefile;
th_raise_line = ruby_sourceline;
rb_thread_restore_context(curr_thread, RESTORE_RAISE);
return Qnil; /* not reached */
}
static VALUE
rb_thread_raise_m(argc, argv, thread)
int argc;
VALUE *argv;
VALUE thread;
{
rb_thread_t th = rb_thread_check(thread);
if (ruby_safe_level > th->safe) {
rb_secure(4);
}
rb_thread_raise(argc, argv, th);
return Qnil; /* not reached */
}
VALUE
rb_thread_local_aref(thread, id)
VALUE thread;
ID id;
{
rb_thread_t th;
VALUE val;
th = rb_thread_check(thread);
if (rb_safe_level() >= 4 && th != curr_thread) {
rb_raise(rb_eSecurityError, "Insecure: thread locals");
}
if (!th->locals) return Qnil;
if (st_lookup(th->locals, id, &val)) {
return val;
}
return Qnil;
}
static VALUE
rb_thread_aref(thread, id)
VALUE thread, id;
{
return rb_thread_local_aref(thread, rb_to_id(id));
}
VALUE
rb_thread_local_aset(thread, id, val)
VALUE thread;
ID id;
VALUE val;
{
rb_thread_t th = rb_thread_check(thread);
if (rb_safe_level() >= 4 && th != curr_thread) {
rb_raise(rb_eSecurityError, "Insecure: can't modify thread locals");
}
if (OBJ_FROZEN(thread)) rb_error_frozen("thread locals");
if (!th->locals) {
th->locals = st_init_numtable();
}
if (NIL_P(val)) {
st_delete(th->locals, &id, 0);
return Qnil;
}
st_insert(th->locals, id, val);
return val;
}
static VALUE
rb_thread_aset(thread, id, val)
VALUE thread, id, val;
{
return rb_thread_local_aset(thread, rb_to_id(id), val);
}
static VALUE
rb_thread_key_p(thread, id)
VALUE thread, id;
{
rb_thread_t th = rb_thread_check(thread);
if (!th->locals) return Qfalse;
if (st_lookup(th->locals, rb_to_id(id), 0))
return Qtrue;
return Qfalse;
}
static VALUE
rb_thread_inspect(thread)
VALUE thread;
{
char *cname = rb_class2name(CLASS_OF(thread));
rb_thread_t th = rb_thread_check(thread);
char *status;
VALUE str;
switch (th->status) {
case THREAD_RUNNABLE:
status = "run"; break;
case THREAD_STOPPED:
status = "sleep"; break;
case THREAD_TO_KILL:
status = "aborting"; break;
case THREAD_KILLED:
status = "dead"; break;
default:
status = "unknown"; break;
}
str = rb_str_new(0, strlen(cname)+7+16+9+1); /* 7:tags 16:addr 9:status 1:nul */
sprintf(RSTRING(str)->ptr, "#<%s:0x%lx %s>", cname, thread, status);
RSTRING(str)->len = strlen(RSTRING(str)->ptr);
OBJ_INFECT(str, thread);
return str;
}
void
rb_thread_atfork()
{
rb_thread_t th;
if (rb_thread_alone()) return;
FOREACH_THREAD(th) {
if (th != curr_thread) {
th->status = THREAD_KILLED;
}
}
END_FOREACH(th);
main_thread = curr_thread;
curr_thread->next = curr_thread;
curr_thread->prev = curr_thread;
}
static VALUE rb_cCont;
static VALUE
rb_callcc(self)
VALUE self;
{
volatile VALUE cont;
rb_thread_t th;
struct tag *tag;
struct RVarmap *vars;
THREAD_ALLOC(th);
cont = Data_Wrap_Struct(rb_cCont, thread_mark, thread_free, th);
scope_dup(ruby_scope);
for (tag=prot_tag; tag; tag=tag->prev) {
scope_dup(tag->scope);
}
th->thread = curr_thread->thread;
for (vars = th->dyna_vars; vars; vars = vars->next) {
if (FL_TEST(vars, DVAR_DONT_RECYCLE)) break;
FL_SET(vars, DVAR_DONT_RECYCLE);
}
if (THREAD_SAVE_CONTEXT(th)) {
return th->result;
}
else {
return rb_yield(cont);
}
}
static VALUE
rb_cont_call(argc, argv, cont)
int argc;
VALUE *argv;
VALUE cont;
{
rb_thread_t th = rb_thread_check(cont);
if (th->thread != curr_thread->thread) {
rb_raise(rb_eRuntimeError, "continuation called across threads");
}
switch (argc) {
case 0:
th->result = Qnil;
break;
case 1:
th->result = *argv;
break;
default:
th->result = rb_ary_new4(argc, argv);
break;
}
rb_thread_restore_context(th, RESTORE_NORMAL);
return Qnil;
}
struct thgroup {
int gid;
};
static VALUE
thgroup_s_new(argc, argv, klass)
int argc;
VALUE *argv;
VALUE klass;
{
VALUE group;
struct thgroup *data;
static int serial = 1;
group = Data_Make_Struct(klass, struct thgroup, 0, free, data);
data->gid = serial++;
rb_obj_call_init(group, argc, argv);
return group;
}
static VALUE
thgroup_list(group)
VALUE group;
{
struct thgroup *data;
rb_thread_t th;
VALUE ary;
Data_Get_Struct(group, struct thgroup, data);
ary = rb_ary_new();
FOREACH_THREAD(th) {
if (th->gid == data->gid) {
rb_ary_push(ary, th->thread);
}
}
END_FOREACH(th);
return ary;
}
static VALUE
thgroup_add(group, thread)
VALUE group, thread;
{
rb_thread_t th;
struct thgroup *data;
rb_secure(4);
th = rb_thread_check(thread);
Data_Get_Struct(group, struct thgroup, data);
th->gid = data->gid;
return group;
}
void
Init_Thread()
{
VALUE cThGroup;
rb_eThreadError = rb_define_class("ThreadError", rb_eStandardError);
rb_cThread = rb_define_class("Thread", rb_cObject);
rb_define_singleton_method(rb_cThread, "new", rb_thread_s_new, -1);
rb_define_method(rb_cThread, "initialize", rb_thread_initialize, -2);
rb_define_singleton_method(rb_cThread, "start", rb_thread_start, -2);
rb_define_singleton_method(rb_cThread, "fork", rb_thread_start, -2);
rb_define_singleton_method(rb_cThread, "stop", rb_thread_stop, 0);
rb_define_singleton_method(rb_cThread, "kill", rb_thread_s_kill, 1);
rb_define_singleton_method(rb_cThread, "exit", rb_thread_exit, 0);
rb_define_singleton_method(rb_cThread, "pass", rb_thread_pass, 0);
rb_define_singleton_method(rb_cThread, "current", rb_thread_current, 0);
rb_define_singleton_method(rb_cThread, "main", rb_thread_main, 0);
rb_define_singleton_method(rb_cThread, "list", rb_thread_list, 0);
rb_define_singleton_method(rb_cThread, "critical", rb_thread_critical_get, 0);
rb_define_singleton_method(rb_cThread, "critical=", rb_thread_critical_set, 1);
rb_define_singleton_method(rb_cThread, "abort_on_exception", rb_thread_s_abort_exc, 0);
rb_define_singleton_method(rb_cThread, "abort_on_exception=", rb_thread_s_abort_exc_set, 1);
rb_define_method(rb_cThread, "run", rb_thread_run, 0);
rb_define_method(rb_cThread, "wakeup", rb_thread_wakeup, 0);
rb_define_method(rb_cThread, "kill", rb_thread_kill, 0);
rb_define_method(rb_cThread, "exit", rb_thread_kill, 0);
rb_define_method(rb_cThread, "value", rb_thread_value, 0);
rb_define_method(rb_cThread, "status", rb_thread_status, 0);
rb_define_method(rb_cThread, "join", rb_thread_join, 0);
rb_define_method(rb_cThread, "alive?", rb_thread_alive_p, 0);
rb_define_method(rb_cThread, "stop?", rb_thread_stop_p, 0);
rb_define_method(rb_cThread, "raise", rb_thread_raise_m, -1);
rb_define_method(rb_cThread, "abort_on_exception", rb_thread_abort_exc, 0);
rb_define_method(rb_cThread, "abort_on_exception=", rb_thread_abort_exc_set, 1);
rb_define_method(rb_cThread, "priority", rb_thread_priority, 0);
rb_define_method(rb_cThread, "priority=", rb_thread_priority_set, 1);
rb_define_method(rb_cThread, "safe_level", rb_thread_safe_level, 0);
rb_define_method(rb_cThread, "[]", rb_thread_aref, 1);
rb_define_method(rb_cThread, "[]=", rb_thread_aset, 2);
rb_define_method(rb_cThread, "key?", rb_thread_key_p, 1);
rb_define_method(rb_cThread, "inspect", rb_thread_inspect, 0);
/* allocate main thread */
main_thread = rb_thread_alloc(rb_cThread);
curr_thread = main_thread->prev = main_thread->next = main_thread;
rb_cCont = rb_define_class("Continuation", rb_cObject);
rb_undef_method(CLASS_OF(rb_cCont), "new");
rb_define_method(rb_cCont, "call", rb_cont_call, -1);
rb_define_global_function("callcc", rb_callcc, 0);
cThGroup = rb_define_class("ThreadGroup", rb_cObject);
rb_define_singleton_method(cThGroup, "new", thgroup_s_new, -1);
rb_define_method(cThGroup, "list", thgroup_list, 0);
rb_define_method(cThGroup, "add", thgroup_add, 1);
rb_define_const(cThGroup, "Default", thgroup_s_new(0, 0, cThGroup));
}
static VALUE
rb_f_catch(dmy, tag)
VALUE dmy, tag;
{
int state;
ID t;
VALUE val; /* OK */
t = rb_to_id(tag);
PUSH_TAG(t);
if ((state = EXEC_TAG()) == 0) {
val = rb_yield_0(tag, 0, 0, 0);
}
else if (state == TAG_THROW && t == prot_tag->dst) {
val = prot_tag->retval;
state = 0;
}
POP_TAG();
if (state) JUMP_TAG(state);
return val;
}
static VALUE
catch_i(tag)
ID tag;
{
return rb_funcall(Qnil, rb_intern("catch"), 1, ID2SYM(tag));
}
VALUE
rb_catch(tag, proc, data)
const char *tag;
VALUE (*proc)();
VALUE data;
{
return rb_iterate(catch_i, rb_intern(tag), proc, data);
}
static VALUE
rb_f_throw(argc, argv)
int argc;
VALUE *argv;
{
VALUE tag, value;
ID t;
struct tag *tt = prot_tag;
rb_scan_args(argc, argv, "11", &tag, &value);
t = rb_to_id(tag);
while (tt) {
if (tt->tag == t) {
tt->dst = t;
break;
}
if (tt->tag == PROT_THREAD) {
rb_raise(rb_eThreadError, "uncaught throw `%s' in thread 0x%x",
rb_id2name(t),
curr_thread);
}
tt = tt->prev;
}
if (!tt) {
rb_raise(rb_eNameError, "uncaught throw `%s'", rb_id2name(t));
}
return_value(value);
rb_trap_restore_mask();
JUMP_TAG(TAG_THROW);
}
void
rb_throw(tag, val)
const char *tag;
VALUE val;
{
VALUE argv[2];
ID t = rb_intern(tag);
argv[0] = ID2SYM(t);
argv[1] = val;
rb_f_throw(2, argv);
}
static void
return_check()
{
struct tag *tt = prot_tag;
while (tt) {
if (tt->tag == PROT_FUNC) {
break;
}
if (tt->tag == PROT_THREAD) {
rb_raise(rb_eThreadError, "return from within thread 0x%x",
curr_thread);
}
tt = tt->prev;
}
}
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