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eval.c
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eval.c
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/**********************************************************************
eval.c -
$Author$
$Date$
created at: Thu Jun 10 14:22:17 JST 1993
Copyright (C) 1993-2003 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 "util.h"
#include "rubysig.h"
#ifdef HAVE_STDLIB_H
#include <stdlib.h>
#endif
#ifndef EXIT_SUCCESS
#define EXIT_SUCCESS 0
#endif
#ifndef EXIT_FAILURE
#define EXIT_FAILURE 1
#endif
#include <stdio.h>
#if defined(HAVE_GETCONTEXT) && defined(HAVE_SETCONTEXT)
#include <ucontext.h>
#define USE_CONTEXT
#endif
#include <setjmp.h>
#include "st.h"
#include "dln.h"
#ifdef __APPLE__
#include <crt_externs.h>
#endif
/* Make alloca work the best possible way. */
#ifdef __GNUC__
# ifndef atarist
# ifndef alloca
# define alloca __builtin_alloca
# endif
# endif /* atarist */
#else
# ifdef HAVE_ALLOCA_H
# include <alloca.h>
# else
# ifndef _AIX
# ifndef alloca /* predefined by HP cc +Olibcalls */
void *alloca ();
# endif
# endif /* AIX */
# endif /* HAVE_ALLOCA_H */
#endif /* __GNUC__ */
#include <stdarg.h>
#ifdef HAVE_UNISTD_H
#include <unistd.h>
#endif
#ifdef __BEOS__
#include <net/socket.h>
#endif
#ifdef __MACOS__
#include "macruby_private.h"
#endif
#ifdef __VMS
#include "vmsruby_private.h"
#endif
#ifdef USE_CONTEXT
typedef struct {
ucontext_t context;
volatile int status;
} rb_jmpbuf_t[1];
NORETURN(static void rb_jump_context(rb_jmpbuf_t, int));
static inline void
rb_jump_context(rb_jmpbuf_t env, int val)
{
env->status = val;
setcontext(&env->context);
abort(); /* ensure noreturn */
}
/*
* PRE_GETCONTEXT and POST_GETCONTEXT is a magic for getcontext, gcc,
* IA64 register stack and SPARC register window combination problem.
*
* Assume following code sequence.
*
* 1. set a register in the register stack/window such as r32/l0.
* 2. call getcontext.
* 3. use the register.
* 4. update the register for other use.
* 5. call setcontext indirectly (or directly).
*
* This code should be run as 1->2->3->4->5->3->4.
* But after second getcontext return (second 3),
* the register is broken (updated).
* It's because getcontext/setcontext doesn't preserve the content of the
* register stack/window.
*
* setjmp also doesn't preserve the content of the register stack/window.
* But it has not the problem because gcc knows setjmp may return twice.
* gcc detects setjmp and generates setjmp safe code.
*
* So setjmp calls before and after getcontext call makes the code
* somewhat safe.
* It fix the problem on IA64.
* It is not required that setjmp is called at run time, since the problem is
* register usage.
*
* Since the magic setjmp is not enough for SPARC,
* inline asm is used to prohibit registers in register windows.
*
* Since the problem is fixed at gcc 4.0.3, the magic is applied only for
* prior versions of gcc.
* http://gcc.gnu.org/bugzilla/show_bug.cgi?id=21957
* http://gcc.gnu.org/bugzilla/show_bug.cgi?id=22127
*/
# define GCC_VERSION_BEFORE(major, minor, patchlevel) \
(defined(__GNUC__) && !defined(__INTEL_COMPILER) && \
((__GNUC__ < (major)) || \
(__GNUC__ == (major) && __GNUC_MINOR__ < (minor)) || \
(__GNUC__ == (major) && __GNUC_MINOR__ == (minor) && __GNUC_PATCHLEVEL__ < (patchlevel))))
# if GCC_VERSION_BEFORE(4,0,3) && (defined(sparc) || defined(__sparc__))
# ifdef __pic__
/*
* %l7 is excluded for PIC because it is PIC register.
* http://lists.freebsd.org/pipermail/freebsd-sparc64/2006-January/003739.html
*/
# define PRE_GETCONTEXT \
({ __asm__ volatile ("" : : : \
"%o0", "%o1", "%o2", "%o3", "%o4", "%o5", "%o7", \
"%l0", "%l1", "%l2", "%l3", "%l4", "%l5", "%l6", \
"%i0", "%i1", "%i2", "%i3", "%i4", "%i5", "%i7"); }),
# else
# define PRE_GETCONTEXT \
({ __asm__ volatile ("" : : : \
"%o0", "%o1", "%o2", "%o3", "%o4", "%o5", "%o7", \
"%l0", "%l1", "%l2", "%l3", "%l4", "%l5", "%l6", "%l7", \
"%i0", "%i1", "%i2", "%i3", "%i4", "%i5", "%i7"); }),
# endif
# define POST_GETCONTEXT PRE_GETCONTEXT
# elif GCC_VERSION_BEFORE(4,0,3) && defined(__ia64)
static jmp_buf function_call_may_return_twice_jmp_buf;
int function_call_may_return_twice_false_1 = 0;
int function_call_may_return_twice_false_2 = 0;
# define PRE_GETCONTEXT \
(function_call_may_return_twice_false_1 ? \
setjmp(function_call_may_return_twice_jmp_buf) : \
0),
# define POST_GETCONTEXT \
(function_call_may_return_twice_false_2 ? \
setjmp(function_call_may_return_twice_jmp_buf) : \
0),
# elif defined(__FreeBSD__) && __FreeBSD__ < 7
/*
* workaround for FreeBSD/i386 getcontext/setcontext bug.
* clear the carry flag by (0 ? ... : ...).
* FreeBSD PR 92110 http://www.freebsd.org/cgi/query-pr.cgi?pr=92110
* [ruby-dev:28263]
*/
static int volatile freebsd_clear_carry_flag = 0;
# define PRE_GETCONTEXT \
(freebsd_clear_carry_flag ? (freebsd_clear_carry_flag = 0) : 0),
# endif
# ifndef PRE_GETCONTEXT
# define PRE_GETCONTEXT
# endif
# ifndef POST_GETCONTEXT
# define POST_GETCONTEXT
# endif
# define ruby_longjmp(env, val) rb_jump_context(env, val)
# define ruby_setjmp(just_before_setjmp, j) ((j)->status = 0, \
(just_before_setjmp), \
PRE_GETCONTEXT \
getcontext(&(j)->context), \
POST_GETCONTEXT \
(j)->status)
#else
typedef jmp_buf rb_jmpbuf_t;
# if !defined(setjmp) && defined(HAVE__SETJMP)
# define ruby_setjmp(just_before_setjmp, env) \
((just_before_setjmp), _setjmp(env))
# define ruby_longjmp(env,val) _longjmp(env,val)
# else
# define ruby_setjmp(just_before_setjmp, env) \
((just_before_setjmp), setjmp(env))
# define ruby_longjmp(env,val) longjmp(env,val)
# endif
#endif
#include <sys/types.h>
#include <signal.h>
#include <errno.h>
#if defined(__VMS)
#pragma nostandard
#endif
#ifdef HAVE_SYS_SELECT_H
#include <sys/select.h>
#endif
/*
Solaris sys/select.h switches select to select_large_fdset to support larger
file descriptors if FD_SETSIZE is larger than 1024 on 32bit environment.
But Ruby doesn't change FD_SETSIZE because fd_set is allocated dynamically.
So following definition is required to use select_large_fdset.
*/
#ifdef HAVE_SELECT_LARGE_FDSET
#define select(n, r, w, e, t) select_large_fdset(n, r, w, e, t)
#endif
#ifdef HAVE_SYS_PARAM_H
#include <sys/param.h>
#endif
#include <sys/stat.h>
VALUE rb_cProc;
VALUE rb_cBinding;
static VALUE proc_alloc(VALUE,struct BLOCK*,int);
static VALUE proc_invoke(VALUE,VALUE,VALUE,VALUE,int);
static VALUE proc_lambda(void);
static VALUE rb_f_binding(VALUE);
static void rb_f_END(void);
static struct BLOCK *passing_block(VALUE,struct BLOCK*);
static int block_orphan(struct BLOCK *data);
VALUE rb_cMethod;
VALUE rb_cUnboundMethod;
static VALUE umethod_bind(VALUE, VALUE);
static VALUE rb_mod_define_method(int, VALUE*, VALUE);
NORETURN(static void rb_raise_jump(VALUE));
static VALUE rb_make_exception(int argc, VALUE *argv);
static int vis_mode;
#define VIS_PUBLIC 0
#define VIS_PRIVATE 1
#define VIS_PROTECTED 2
#define VIS_MODFUNC 5
#define VIS_LOCAL 8
#define VIS_MASK 15
#define VIS_SET(f) (vis_mode=(f))
#define VIS_TEST(f) (vis_mode&(f))
#define VIS_MODE() (vis_mode)
NODE* ruby_current_node;
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 generated objects are tainted
4 - no global (non-tainted) variable modification/no direct output
*/
static VALUE safe_getter(void);
static void safe_setter(VALUE val);
void
rb_secure(int level)
{
if (level <= ruby_safe_level) {
if (ruby_frame->callee) {
rb_raise(rb_eSecurityError, "Insecure operation `%s' at level %d",
rb_id2name(ruby_frame->callee), ruby_safe_level);
}
else {
rb_raise(rb_eSecurityError, "Insecure operation at level %d", ruby_safe_level);
}
}
}
void
rb_secure_update(VALUE obj)
{
if (!OBJ_TAINTED(obj)) rb_secure(4);
}
void
rb_check_safe_obj(VALUE x)
{
if (ruby_safe_level > 0 && OBJ_TAINTED(x)){
if (ruby_frame->callee) {
rb_raise(rb_eSecurityError, "Insecure operation - %s",
rb_id2name(ruby_frame->callee));
}
else {
rb_raise(rb_eSecurityError, "Insecure operation: -r");
}
}
rb_secure(4);
}
void
rb_check_safe_str(VALUE x)
{
rb_check_safe_obj(x);
if (TYPE(x)!= T_STRING) {
rb_raise(rb_eTypeError, "wrong argument type %s (expected String)",
rb_obj_classname(x));
}
}
NORETURN(static void raise_undef(VALUE, ID));
static void
raise_undef(VALUE klass, ID id)
{
rb_name_error(id, "undefined method `%s' for %s `%s'",
rb_id2name(id),
(TYPE(klass) == T_MODULE) ? "module" : "class",
rb_class2name(klass));
}
static ID removed, singleton_removed, undefined, singleton_undefined;
#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[2][CACHE_SIZE];
static int ruby_running = 0;
void
rb_clear_cache()
{
int i;
if (!ruby_running) return;
for (i=0; i<CACHE_SIZE; i++) {
cache[0][i].mid = cache[1][i].mid = 0;
}
}
static void
rb_clear_cache_for_remove(VALUE klass, ID id)
{
int i, j;
if (!ruby_running) return;
for (i=0; i<CACHE_SIZE; i++) {
for (j=0; j<2; j++) {
struct cache_entry *ent = cache[j]+i;
if (ent->mid == id &&
RCLASS(ent->origin)->m_tbl == RCLASS(klass)->m_tbl) {
ent->mid = 0;
}
}
}
}
static void
rb_clear_cache_by_id(ID id)
{
int i, j;
if (!ruby_running) return;
for (i=0; i<CACHE_SIZE; i++) {
for (j=0; j<2; j++) {
struct cache_entry *ent = cache[j]+i;
if (ent->mid == id) {
ent->mid = 0;
}
}
}
}
void
rb_clear_cache_by_class(VALUE klass)
{
int i, j;
if (!ruby_running) return;
for (i=0; i<CACHE_SIZE; i++) {
for (j=0; j<2; j++) {
struct cache_entry *ent = cache[j]+i;
if (ent->klass == klass || ent->origin == klass) {
ent->mid = 0;
}
}
}
}
static ID init, eqq, each, aref, aset, match, missing;
static ID added, singleton_added;
static ID object_id, __send, __send_bang, respond_to;
#define NOEX_SAFE(n) ((n) >> 5)
#define NOEX_WITH(n, v) ((n) | (v) << 5)
#define NOEX_WITH_SAFE(n) NOEX_WITH(n, ruby_safe_level)
void
rb_add_method(VALUE klass, ID mid, NODE *node, int noex)
{
NODE *body;
if (NIL_P(klass)) klass = rb_cObject;
if (ruby_safe_level >= 4 && (klass == rb_cObject || !OBJ_TAINTED(klass))) {
rb_raise(rb_eSecurityError, "Insecure: can't define method");
}
if (!FL_TEST(klass, FL_SINGLETON) &&
node && nd_type(node) != NODE_ZSUPER &&
(mid == rb_intern("initialize" )|| mid == rb_intern("initialize_copy"))) {
noex = NOEX_PRIVATE | noex;
}
else if (FL_TEST(klass, FL_SINGLETON) && node && nd_type(node) == NODE_CFUNC &&
mid == rb_intern("allocate")) {
rb_warn("defining %s.allocate is deprecated; use rb_define_alloc_func()",
rb_class2name(rb_iv_get(klass, "__attached__")));
mid = ID_ALLOCATOR;
}
if (OBJ_FROZEN(klass)) rb_error_frozen("class/module");
rb_clear_cache_by_id(mid);
body = NEW_METHOD(node, NOEX_WITH_SAFE(noex));
st_insert(RCLASS(klass)->m_tbl, mid, (st_data_t)body);
if (node && mid != ID_ALLOCATOR && ruby_running) {
if (FL_TEST(klass, FL_SINGLETON)) {
rb_funcall(rb_iv_get(klass, "__attached__"), singleton_added, 1, ID2SYM(mid));
}
else {
rb_funcall(klass, added, 1, ID2SYM(mid));
}
}
}
void
rb_define_alloc_func(VALUE klass, VALUE (*func) (VALUE))
{
Check_Type(klass, T_CLASS);
rb_add_method(CLASS_OF(klass), ID_ALLOCATOR, NEW_CFUNC(func, 0), NOEX_PRIVATE);
}
void
rb_undef_alloc_func(VALUE klass)
{
Check_Type(klass, T_CLASS);
rb_add_method(CLASS_OF(klass), ID_ALLOCATOR, 0, NOEX_UNDEF);
}
#define LOOKUP_NORMAL 0
#define LOOKUP_FCALL 1
#define LOOKUP_NOSKIP 2
#define LOOKUP_LOCAL 1
static NODE*
search_method(VALUE klass, ID id, VALUE *origin, int flag, int *out)
{
NODE *body;
if (flag == LOOKUP_FCALL && ruby_frame->this_class) {
if (st_lookup(RCLASS(ruby_frame->this_class)->m_tbl, id, (st_data_t *)&body) &&
body->nd_noex == NOEX_LOCAL) {
if (origin) *origin = ruby_frame->this_class;
if (out) *out = LOOKUP_LOCAL;
return body;
}
}
for (;klass; klass = RCLASS(klass)->super) {
if (st_lookup(RCLASS(klass)->m_tbl, id, (st_data_t *)&body) &&
(flag == LOOKUP_NOSKIP || body->nd_noex != NOEX_LOCAL)) {
if (origin) *origin = klass;
if (out) *out = LOOKUP_NORMAL;
return body;
}
}
return 0;
}
static NODE*
rb_get_method_body(VALUE *klassp, ID *idp, int *noexp)
{
ID id = *idp;
VALUE klass = *klassp;
VALUE origin;
NODE * volatile body;
struct cache_entry *ent;
int noex = *noexp;
int lc;
if ((body = search_method(klass, id, &origin, noex, &lc)) == 0 || !body->nd_body) {
/* store empty info in cache */
ent = cache[noex] + EXPR1(klass, id);
ent->klass = klass;
ent->origin = klass;
ent->mid = ent->mid0 = id;
ent->noex = 0;
ent->method = 0;
return 0;
}
if (ruby_running) {
VALUE c = (lc == LOOKUP_LOCAL) ? origin : klass;
/* store in cache */
ent = cache[lc] + EXPR1(c, id);
ent->klass = c;
ent->noex = body->nd_noex;
if (noexp) *noexp = 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;
}
}
else {
if (noexp) *noexp = body->nd_noex;
body = body->nd_body;
if (nd_type(body) == NODE_FBODY) {
*klassp = body->nd_orig;
*idp = body->nd_mid;
body = body->nd_head;
}
else {
*klassp = origin;
}
}
return body;
}
NODE*
rb_method_node(VALUE klass, ID id)
{
int noex = LOOKUP_NORMAL;
struct cache_entry *ent;
ent = cache[0] + EXPR1(klass, id);
if (ent->mid == id && ent->klass == klass && ent->method){
return ent->method;
}
return rb_get_method_body(&klass, &id, &noex);
}
static void
remove_method(VALUE klass, ID mid)
{
NODE *body;
if (klass == rb_cObject) {
rb_secure(4);
}
if (ruby_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 (mid == object_id || mid == __send || mid == __send_bang || mid == init) {
rb_warn("removing `%s' may cause serious problem", rb_id2name(mid));
}
if (!st_delete(RCLASS(klass)->m_tbl, &mid, (st_data_t *)&body) ||
!body->nd_body) {
rb_name_error(mid, "method `%s' not defined in %s",
rb_id2name(mid), rb_class2name(klass));
}
rb_clear_cache_for_remove(klass, mid);
if (FL_TEST(klass, FL_SINGLETON)) {
rb_funcall(rb_iv_get(klass, "__attached__"), singleton_removed, 1, ID2SYM(mid));
}
else {
rb_funcall(klass, removed, 1, ID2SYM(mid));
}
}
void
rb_remove_method(VALUE klass, const char *name)
{
remove_method(klass, rb_intern(name));
}
/*
* call-seq:
* remove_method(symbol) => self
*
* Removes the method identified by _symbol_ from the current
* class. For an example, see <code>Module.undef_method</code>.
*/
static VALUE
rb_mod_remove_method(int argc, VALUE *argv, VALUE mod)
{
int i;
for (i=0; i<argc; i++) {
remove_method(mod, rb_to_id(argv[i]));
}
return mod;
}
#undef rb_disable_super
#undef rb_enable_super
void
rb_disable_super(VALUE klass, const char *name)
{
/* obsolete - no use */
}
void
rb_enable_super(VALUE klass, const char *name)
{
rb_warning("rb_enable_super() is obsolete");
}
static void
rb_export_method(VALUE klass, ID name, ID noex)
{
NODE *body;
VALUE origin;
if (klass == rb_cObject) {
rb_secure(4);
}
body = search_method(klass, name, &origin, LOOKUP_NOSKIP, 0);
if (!body && TYPE(klass) == T_MODULE) {
body = search_method(rb_cObject, name, &origin, LOOKUP_NOSKIP, 0);
}
if (!body || !body->nd_body) {
raise_undef(klass, name);
}
if (body->nd_noex != noex) {
if (klass == origin) {
body->nd_noex = noex;
}
else {
rb_add_method(klass, name, NEW_ZSUPER(), noex);
}
}
}
static int
method_exists(VALUE klass, ID id, int noex)
{
struct cache_entry *ent;
int nx = noex;
switch (noex) {
case LOOKUP_NORMAL:
case LOOKUP_FCALL:
/* is it in the method cache? */
ent = cache[noex] + EXPR1(klass, id);
if (ent->mid == id && ent->klass == klass) {
if (nx == LOOKUP_NORMAL) {
if (ent->noex == NOEX_PRIVATE) return Qfalse;
}
else if (ent->noex != NOEX_LOCAL) {
if (!ent->method) return Qfalse;
return Qtrue;
}
}
/* fall through */
default:
if (rb_get_method_body(&klass, &id, &noex)) {
if (nx == LOOKUP_NORMAL && noex == NOEX_PRIVATE)
return Qfalse;
return Qtrue;
}
return Qfalse;
}
}
int
rb_method_boundp(VALUE klass, ID id, int pub)
{
return method_exists(klass, id, pub ? LOOKUP_NORMAL : LOOKUP_FCALL);
}
void
rb_attr(VALUE klass, ID id, int read, int write, int noex)
{
const char *name;
char *buf;
ID attriv;
size_t len;
if (!noex) noex = NOEX_PUBLIC;
else {
if (VIS_TEST(VIS_PRIVATE)) {
noex = NOEX_PRIVATE;
rb_warning((VIS_MODE() == VIS_MODFUNC) ?
"attribute accessor as module_function" :
"private attribute?");
}
else if (VIS_TEST(VIS_PROTECTED)) {
noex = NOEX_PROTECTED;
}
else {
noex = NOEX_PUBLIC;
}
}
if (!rb_is_local_id(id) && !rb_is_const_id(id)) {
rb_name_error(id, "invalid attribute name `%s'", rb_id2name(id));
}
name = rb_id2name(id);
if (!name) {
rb_raise(rb_eArgError, "argument needs to be symbol or string");
}
len = strlen(name)+2;
buf = ALLOCA_N(char,len);
snprintf(buf, len, "@%s", name);
attriv = rb_intern(buf);
if (read) {
rb_add_method(klass, id, NEW_IVAR(attriv), noex);
}
if (write) {
rb_add_method(klass, rb_id_attrset(id), NEW_ATTRSET(attriv), noex);
}
}
VALUE ruby_errinfo = Qnil;
extern int ruby_nerrs;
VALUE rb_eLocalJumpError;
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;
static unsigned long frame_unique = 1;
#define PUSH_FRAME(link) do { \
struct FRAME _frame; \
_frame.prev = ruby_frame; \
_frame.tmp = 0; \
_frame.node = ruby_current_node; \
_frame.argc = 0; \
_frame.self = (link)?ruby_frame->self:0;\
_frame.block = (link)?ruby_frame->block:0;\
_frame.flags = 0; \
_frame.uniq = frame_unique++; \
_frame.callee = 0; \
_frame.this_func = 0; \
_frame.this_class = 0; \
ruby_frame = &_frame
#define POP_FRAME() \
ruby_current_node = _frame.node; \
ruby_frame = _frame.prev; \
} while (0)
static unsigned long block_unique = 1;
#define PUSH_BLOCK(v,iv,b) do { \
struct BLOCK _block; \
_block.var = (iv); \
_block.body = (b); \
_block.self = self; \
_block.frame = *ruby_frame; \
_block.cref = ruby_cref; \
_block.frame.node = ruby_current_node;\
_block.scope = ruby_scope; \
_block.vmode = vis_mode; \
_block.flags = BLOCK_D_SCOPE; \
_block.dyna_vars = ruby_dyna_vars; \
_block.wrapper = ruby_wrapper; \
_block.block_obj = 0; \
if (b) { \
_block.uniq = block_unique++; \
prot_tag->blkid = _block.uniq; \
} \
else { \
_block.uniq = 0; \
prot_tag->blkid = 0; \
} \
(v) = &_block
#define POP_BLOCK() } while (0)
struct RVarmap *ruby_dyna_vars;
#define PUSH_VARS() do { \
struct RVarmap * volatile _old; \
_old = ruby_dyna_vars; \
ruby_dyna_vars = 0
#define POP_VARS() \
if (_old && (ruby_scope->flags & SCOPE_DONT_RECYCLE)) {\
if (RBASIC(_old)->flags) /* unless it's already recycled */ \
FL_SET(_old, DVAR_DONT_RECYCLE); \
}\
ruby_dyna_vars = _old; \
} while (0)
#define DVAR_DONT_RECYCLE FL_USER2
#define DMETHOD_P() (ruby_frame->flags & FRAME_DMETH)
static struct RVarmap*
new_dvar(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)
{
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)
{
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)
{
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 id, VALUE value)
{
ruby_dyna_vars = new_dvar(id, value, ruby_dyna_vars);
}
static void
dvar_asgn_internal(ID id, VALUE value, int curr)
{
int n = 0;
struct RVarmap *vars = ruby_dyna_vars;
while (vars) {
if (curr && vars->id == 0) {
/* first null is a dvar header */
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;
}
}
static inline void
dvar_asgn(ID id, VALUE value)
{
dvar_asgn_internal(id, value, 0);
}
static inline void
dvar_asgn_curr(ID id, VALUE value)
{
dvar_asgn_internal(id, value, 1);
}
VALUE *
rb_svar(int cnt)
{
struct RVarmap *vars = ruby_dyna_vars;
ID id;
if (!ruby_scope->local_tbl) return NULL;
if (cnt >= ruby_scope->local_tbl[0]) return NULL;
id = ruby_scope->local_tbl[cnt+1];
while (vars) {
if (vars->id == id) return &vars->val;
vars = vars->next;
}
if (ruby_scope->local_vars == 0) return NULL;
return &ruby_scope->local_vars[cnt];
}
struct tag {
rb_jmpbuf_t buf;
struct FRAME *frame;
VALUE tag;
VALUE retval;
struct SCOPE *scope;
VALUE dst;
struct tag *prev;
int blkid;
};
static struct tag *prot_tag;
#define PUSH_TAG(ptag) do { \
struct tag _tag; \
_tag.retval = Qnil; \
_tag.frame = ruby_frame; \
_tag.prev = prot_tag; \
_tag.scope = ruby_scope; \
_tag.tag = ptag; \
_tag.dst = -1; \
_tag.blkid = 0; \
prot_tag = &_tag
#define PROT_NONE Qfalse /* 0 */
#define PROT_THREAD Qtrue /* 2 */
#define PROT_FUNC INT2FIX(0) /* 1 */
#define PROT_LOOP INT2FIX(1) /* 3 */
#define PROT_LAMBDA INT2FIX(2) /* 5 */
#define PROT_YIELD INT2FIX(3) /* 7 */
#define PROT_TOP INT2FIX(4) /* 9 */
#define EXEC_TAG() (FLUSH_REGISTER_WINDOWS, ruby_setjmp(((void)0), prot_tag->buf))
#define JUMP_TAG(st) do { \
ruby_frame = prot_tag->frame; \
ruby_longjmp(prot_tag->buf,(st)); \
} while (0)
#define POP_TAG() \
prot_tag = _tag.prev; \
} while (0)
#define TAG_DST() (_tag.dst == (VALUE)ruby_frame->uniq)
#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_CONTCALL 0x9
#define TAG_THREAD 0xa
#define TAG_MASK 0xf
VALUE ruby_wrapper; /* security wrapper */
static NODE *ruby_cref = 0;
static NODE *top_cref;
#define PUSH_CREF(c) ruby_cref = NEW_NODE(NODE_CREF,(c),0,ruby_cref)
#define POP_CREF() ruby_cref = ruby_cref->nd_next
#define PUSH_SCOPE() do { \
volatile int _vmode = vis_mode; \