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ruby/eval.c

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25 KiB
C
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/**********************************************************************
eval.c -
$Author$
created at: Thu Jun 10 14:22:17 JST 1993
Copyright (C) 1993-2007 Yukihiro Matsumoto
Copyright (C) 2000 Network Applied Communication Laboratory, Inc.
Copyright (C) 2000 Information-technology Promotion Agency, Japan
**********************************************************************/
#include "eval_intern.h"
VALUE proc_invoke(VALUE, VALUE, VALUE, VALUE);
VALUE rb_binding_new(void);
NORETURN(void rb_raise_jump(VALUE));
ID rb_frame_callee(void);
VALUE rb_eLocalJumpError;
VALUE rb_eSysStackError;
#define exception_error GET_VM()->special_exceptions[ruby_error_reenter]
#include "eval_error.c"
#include "eval_safe.c"
#include "eval_jump.c"
/* initialize ruby */
#if defined(__APPLE__)
#define environ (*_NSGetEnviron())
#elif !defined(_WIN32) && !defined(__MACOS__) || defined(_WIN32_WCE)
extern char **environ;
#endif
char **rb_origenviron;
void rb_clear_trace_func(void);
void rb_thread_stop_timer_thread(void);
void rb_call_inits(void);
void Init_heap(void);
void Init_ext(void);
void Init_BareVM(void);
void
ruby_init(void)
{
static int initialized = 0;
int state;
if (initialized)
return;
initialized = 1;
#ifdef __MACOS__
rb_origenviron = 0;
#else
rb_origenviron = environ;
#endif
Init_stack((void *)&state);
Init_BareVM();
Init_heap();
PUSH_TAG();
if ((state = EXEC_TAG()) == 0) {
rb_call_inits();
#ifdef __MACOS__
_macruby_init();
#elif defined(__VMS)
_vmsruby_init();
#endif
ruby_prog_init();
ALLOW_INTS;
}
POP_TAG();
if (state) {
error_print();
exit(EXIT_FAILURE);
}
GET_VM()->running = 1;
}
extern void rb_clear_trace_func(void);
void *
ruby_options(int argc, char **argv)
{
int state;
void *tree = 0;
Init_stack((void *)&state);
PUSH_TAG();
if ((state = EXEC_TAG()) == 0) {
SAVE_ROOT_JMPBUF(GET_THREAD(), tree = ruby_process_options(argc, argv));
}
else {
rb_clear_trace_func();
state = error_handle(state);
tree = (void *)INT2FIX(state);
}
POP_TAG();
return tree;
}
static void
ruby_finalize_0(void)
{
PUSH_TAG();
if (EXEC_TAG() == 0) {
rb_trap_exit();
}
POP_TAG();
rb_exec_end_proc();
rb_clear_trace_func();
}
static void
ruby_finalize_1(void)
{
ruby_sig_finalize();
GET_THREAD()->errinfo = Qnil;
rb_gc_call_finalizer_at_exit();
}
void
ruby_finalize(void)
{
ruby_finalize_0();
ruby_finalize_1();
}
void rb_thread_stop_timer_thread(void);
int
ruby_cleanup(int ex)
{
int state;
volatile VALUE errs[2];
rb_thread_t *th = GET_THREAD();
int nerr;
errs[1] = th->errinfo;
th->safe_level = 0;
Init_stack((void *)&state);
PUSH_TAG();
if ((state = EXEC_TAG()) == 0) {
SAVE_ROOT_JMPBUF(th, ruby_finalize_0());
}
POP_TAG();
errs[0] = th->errinfo;
PUSH_TAG();
if ((state = EXEC_TAG()) == 0) {
SAVE_ROOT_JMPBUF(th, rb_thread_terminate_all());
}
else if (ex == 0) {
ex = state;
}
th->errinfo = errs[1];
ex = error_handle(ex);
ruby_finalize_1();
POP_TAG();
rb_thread_stop_timer_thread();
for (nerr = 0; nerr < sizeof(errs) / sizeof(errs[0]); ++nerr) {
VALUE err = errs[nerr];
if (!RTEST(err)) continue;
/* th->errinfo contains a NODE while break'ing */
if (TYPE(err) == T_NODE) continue;
if (rb_obj_is_kind_of(err, rb_eSystemExit)) {
return sysexit_status(err);
}
else if (rb_obj_is_kind_of(err, rb_eSignal)) {
VALUE sig = rb_iv_get(err, "signo");
ruby_default_signal(NUM2INT(sig));
}
else if (ex == 0) {
ex = 1;
}
}
#if EXIT_SUCCESS != 0 || EXIT_FAILURE != 1
switch (ex) {
#if EXIT_SUCCESS != 0
case 0: return EXIT_SUCCESS;
#endif
#if EXIT_FAILURE != 1
case 1: return EXIT_FAILURE;
#endif
}
#endif
return ex;
}
int
ruby_exec_node(void *n, const char *file)
{
int state;
VALUE iseq = (VALUE)n;
rb_thread_t *th = GET_THREAD();
if (!n) return 0;
PUSH_TAG();
if ((state = EXEC_TAG()) == 0) {
SAVE_ROOT_JMPBUF(th, {
th->base_block = 0;
rb_iseq_eval(iseq);
});
}
POP_TAG();
return state;
}
void
ruby_stop(int ex)
{
exit(ruby_cleanup(ex));
}
int
ruby_run_node(void *n)
{
VALUE v = (VALUE)n;
switch (v) {
case Qtrue: return EXIT_SUCCESS;
case Qfalse: return EXIT_FAILURE;
}
if (FIXNUM_P(v)) {
return FIX2INT(v);
}
Init_stack((void *)&n);
return ruby_cleanup(ruby_exec_node(n, 0));
}
/*
* call-seq:
* Module.nesting => array
*
* Returns the list of +Modules+ nested at the point of call.
*
* module M1
* module M2
* $a = Module.nesting
* end
* end
* $a #=> [M1::M2, M1]
* $a[0].name #=> "M1::M2"
*/
static VALUE
rb_mod_nesting(void)
{
VALUE ary = rb_ary_new();
const NODE *cref = vm_cref();
while (cref && cref->nd_next) {
VALUE klass = cref->nd_clss;
if (!NIL_P(klass)) {
rb_ary_push(ary, klass);
}
cref = cref->nd_next;
}
return ary;
}
/*
* call-seq:
* Module.constants => array
*
* Returns an array of the names of all constants defined in the
* system. This list includes the names of all modules and classes.
*
* p Module.constants.sort[1..5]
*
* <em>produces:</em>
*
* ["ARGV", "ArgumentError", "Array", "Bignum", "Binding"]
*/
static VALUE
rb_mod_s_constants(int argc, VALUE *argv, VALUE mod)
{
const NODE *cref = vm_cref();
VALUE klass;
VALUE cbase = 0;
void *data = 0;
if (argc > 0) {
return rb_mod_constants(argc, argv, rb_cModule);
}
while (cref) {
klass = cref->nd_clss;
if (!NIL_P(klass)) {
data = rb_mod_const_at(cref->nd_clss, data);
if (!cbase) {
cbase = klass;
}
}
cref = cref->nd_next;
}
if (cbase) {
data = rb_mod_const_of(cbase, data);
}
return rb_const_list(data);
}
void
rb_frozen_class_p(VALUE klass)
{
const 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);
}
}
NORETURN(static void rb_longjmp(int, VALUE));
VALUE rb_make_backtrace(void);
static void
rb_longjmp(int tag, VALUE mesg)
{
VALUE at;
VALUE e;
rb_thread_t *th = GET_THREAD();
const char *file;
int line = 0;
if (rb_thread_set_raised(th)) {
th->errinfo = exception_error;
JUMP_TAG(TAG_FATAL);
}
if (NIL_P(mesg))
mesg = th->errinfo;
if (NIL_P(mesg)) {
mesg = rb_exc_new(rb_eRuntimeError, 0, 0);
}
file = rb_sourcefile();
if (file) line = rb_sourceline();
if (file && !NIL_P(mesg)) {
at = get_backtrace(mesg);
if (NIL_P(at)) {
at = rb_make_backtrace();
if (OBJ_FROZEN(mesg)) {
mesg = rb_obj_dup(mesg);
}
set_backtrace(mesg, at);
}
}
if (!NIL_P(mesg)) {
th->errinfo = mesg;
}
if (RTEST(ruby_debug) && !NIL_P(e = th->errinfo) &&
!rb_obj_is_kind_of(e, rb_eSystemExit)) {
int status;
PUSH_TAG();
if ((status = EXEC_TAG()) == 0) {
RB_GC_GUARD(e) = rb_obj_as_string(e);
if (file) {
warn_printf("Exception `%s' at %s:%d - %s\n",
rb_obj_classname(th->errinfo),
file, line, RSTRING_PTR(e));
}
else {
warn_printf("Exception `%s' - %s\n",
rb_obj_classname(th->errinfo),
RSTRING_PTR(e));
}
}
POP_TAG();
if (status == TAG_FATAL && th->errinfo == exception_error) {
th->errinfo = mesg;
}
else if (status) {
rb_thread_reset_raised(th);
JUMP_TAG(status);
}
}
rb_trap_restore_mask();
if (tag != TAG_FATAL) {
EXEC_EVENT_HOOK(th, RUBY_EVENT_RAISE, th->cfp->self,
0 /* TODO: id */, 0 /* TODO: klass */);
}
rb_thread_raised_clear(th);
JUMP_TAG(tag);
}
void
rb_exc_raise(VALUE mesg)
{
rb_longjmp(TAG_RAISE, mesg);
}
void
rb_exc_fatal(VALUE mesg)
{
rb_longjmp(TAG_FATAL, mesg);
}
void
rb_interrupt(void)
{
rb_raise(rb_eInterrupt, "%s", "");
}
static VALUE get_errinfo(void);
/*
* call-seq:
* raise
* raise(string)
* raise(exception [, string [, array]])
* fail
* fail(string)
* fail(exception [, string [, array]])
*
* With no arguments, raises the exception in <code>$!</code> or raises
* a <code>RuntimeError</code> if <code>$!</code> is +nil+.
* With a single +String+ argument, raises a
* +RuntimeError+ with the string as a message. Otherwise,
* the first parameter should be the name of an +Exception+
* class (or an object that returns an +Exception+ object when sent
* an +exception+ message). The optional second parameter sets the
* message associated with the exception, and the third parameter is an
* array of callback information. Exceptions are caught by the
* +rescue+ clause of <code>begin...end</code> blocks.
*
* raise "Failed to create socket"
* raise ArgumentError, "No parameters", caller
*/
static VALUE
rb_f_raise(int argc, VALUE *argv)
{
VALUE err;
if (argc == 0) {
err = get_errinfo();
if (!NIL_P(err)) {
argc = 1;
argv = &err;
}
}
rb_raise_jump(rb_make_exception(argc, argv));
return Qnil; /* not reached */
}
VALUE
rb_make_exception(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:
CONST_ID(exception, "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 number of arguments");
break;
}
if (argc > 0) {
if (!rb_obj_is_kind_of(mesg, rb_eException))
rb_raise(rb_eTypeError, "exception object expected");
if (argc > 2)
set_backtrace(mesg, argv[2]);
}
return mesg;
}
void
rb_raise_jump(VALUE mesg)
{
rb_thread_t *th = GET_THREAD();
th->cfp = RUBY_VM_PREVIOUS_CONTROL_FRAME(th->cfp);
/* TODO: fix me */
rb_longjmp(TAG_RAISE, mesg);
}
void
rb_jump_tag(int tag)
{
JUMP_TAG(tag);
}
int
rb_block_given_p(void)
{
rb_thread_t *th = GET_THREAD();
if ((th->cfp->lfp[0] & 0x02) == 0 &&
GC_GUARDED_PTR_REF(th->cfp->lfp[0])) {
return Qtrue;
}
else {
return Qfalse;
}
}
int
rb_iterator_p()
{
return rb_block_given_p();
}
/*
* call-seq:
* block_given? => true or false
* iterator? => true or false
*
* Returns <code>true</code> if <code>yield</code> would execute a
* block in the current context. The <code>iterator?</code> form
* is mildly deprecated.
*
* def try
* if block_given?
* yield
* else
* "no block"
* end
* end
* try #=> "no block"
* try { "hello" } #=> "hello"
* try do "hello" end #=> "hello"
*/
VALUE
rb_f_block_given_p(void)
{
rb_thread_t *th = GET_THREAD();
rb_control_frame_t *cfp = th->cfp;
cfp = vm_get_ruby_level_caller_cfp(th, RUBY_VM_PREVIOUS_CONTROL_FRAME(cfp));
if (cfp != 0 &&
(cfp->lfp[0] & 0x02) == 0 &&
GC_GUARDED_PTR_REF(cfp->lfp[0])) {
return Qtrue;
}
else {
return Qfalse;
}
}
VALUE rb_eThreadError;
void
rb_need_block()
{
if (!rb_block_given_p()) {
vm_localjump_error("no block given", Qnil, 0);
}
}
VALUE
rb_rescue2(VALUE (* b_proc) (ANYARGS), VALUE data1,
VALUE (* r_proc) (ANYARGS), VALUE data2, ...)
{
int state;
rb_thread_t *th = GET_THREAD();
rb_control_frame_t *cfp = th->cfp;
volatile VALUE result;
volatile VALUE e_info = th->errinfo;
va_list args;
PUSH_TAG();
if ((state = EXEC_TAG()) == 0) {
retry_entry:
result = (*b_proc) (data1);
}
else {
th->cfp = cfp; /* restore */
if (state == TAG_RAISE) {
int handle = Qfalse;
VALUE eclass;
va_init_list(args, data2);
while ((eclass = va_arg(args, VALUE)) != 0) {
if (rb_obj_is_kind_of(th->errinfo, eclass)) {
handle = Qtrue;
break;
}
}
va_end(args);
if (handle) {
if (r_proc) {
PUSH_TAG();
if ((state = EXEC_TAG()) == 0) {
result = (*r_proc) (data2, th->errinfo);
}
POP_TAG();
if (state == TAG_RETRY) {
state = 0;
th->errinfo = Qnil;
goto retry_entry;
}
}
else {
result = Qnil;
state = 0;
}
if (state == 0) {
th->errinfo = e_info;
}
}
}
}
POP_TAG();
if (state)
JUMP_TAG(state);
return result;
}
VALUE
rb_rescue(VALUE (* b_proc)(ANYARGS), VALUE data1,
VALUE (* r_proc)(ANYARGS), VALUE data2)
{
return rb_rescue2(b_proc, data1, r_proc, data2, rb_eStandardError,
(VALUE)0);
}
VALUE
rb_protect(VALUE (* proc) (VALUE), VALUE data, int * state)
{
VALUE result = Qnil; /* OK */
int status;
rb_thread_t *th = GET_THREAD();
rb_control_frame_t *cfp = th->cfp;
struct rb_vm_trap_tag trap_tag;
rb_jmpbuf_t org_jmpbuf;
trap_tag.prev = th->trap_tag;
PUSH_TAG();
th->trap_tag = &trap_tag;
MEMCPY(&org_jmpbuf, &(th)->root_jmpbuf, rb_jmpbuf_t, 1);
if ((status = EXEC_TAG()) == 0) {
SAVE_ROOT_JMPBUF(th, result = (*proc) (data));
}
MEMCPY(&(th)->root_jmpbuf, &org_jmpbuf, rb_jmpbuf_t, 1);
th->trap_tag = trap_tag.prev;
POP_TAG();
if (state) {
*state = status;
}
if (status != 0) {
th->cfp = cfp;
return Qnil;
}
return result;
}
VALUE
rb_ensure(VALUE (*b_proc)(ANYARGS), VALUE data1, VALUE (*e_proc)(ANYARGS), VALUE data2)
{
int state;
volatile VALUE result = Qnil;
PUSH_TAG();
if ((state = EXEC_TAG()) == 0) {
result = (*b_proc) (data1);
}
POP_TAG();
/* TODO: fix me */
/* retval = prot_tag ? prot_tag->retval : Qnil; */ /* save retval */
(*e_proc) (data2);
if (state)
JUMP_TAG(state);
return result;
}
VALUE
rb_with_disable_interrupt(VALUE (*proc)(ANYARGS), VALUE data)
{
VALUE result = Qnil; /* OK */
int status;
DEFER_INTS;
{
int thr_critical = rb_thread_critical;
rb_thread_critical = Qtrue;
PUSH_TAG();
if ((status = EXEC_TAG()) == 0) {
result = (*proc) (data);
}
POP_TAG();
rb_thread_critical = thr_critical;
}
ENABLE_INTS;
if (status)
JUMP_TAG(status);
return result;
}
static ID
frame_func_id(rb_control_frame_t *cfp)
{
rb_iseq_t *iseq = cfp->iseq;
if (!iseq) {
return cfp->method_id;
}
while (iseq) {
if (RUBY_VM_IFUNC_P(iseq)) {
return rb_intern("<ifunc>");
}
if (iseq->defined_method_id) {
return iseq->defined_method_id;
}
if (iseq->local_iseq == iseq) {
break;
}
iseq = iseq->parent_iseq;
}
return 0;
}
ID
rb_frame_this_func(void)
{
return frame_func_id(GET_THREAD()->cfp);
}
ID
rb_frame_callee(void)
{
rb_thread_t *th = GET_THREAD();
rb_control_frame_t *prev_cfp = RUBY_VM_PREVIOUS_CONTROL_FRAME(th->cfp);
/* check if prev_cfp can be accessible */
if ((void *)(th->stack + th->stack_size) == (void *)(prev_cfp)) {
return 0;
}
return frame_func_id(prev_cfp);
}
void
rb_frame_pop(void)
{
rb_thread_t *th = GET_THREAD();
th->cfp = RUBY_VM_PREVIOUS_CONTROL_FRAME(th->cfp);
}
/*
* call-seq:
* append_features(mod) => mod
*
* When this module is included in another, Ruby calls
* <code>append_features</code> in this module, passing it the
* receiving module in _mod_. Ruby's default implementation is
* to add the constants, methods, and module variables of this module
* to _mod_ if this module has not already been added to
* _mod_ or one of its ancestors. See also <code>Module#include</code>.
*/
static VALUE
rb_mod_append_features(VALUE module, VALUE 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;
}
/*
* call-seq:
* include(module, ...) => self
*
* Invokes <code>Module.append_features</code> on each parameter in turn.
*/
static VALUE
rb_mod_include(int argc, VALUE *argv, VALUE module)
{
int i;
for (i = 0; i < argc; i++)
Check_Type(argv[i], T_MODULE);
while (argc--) {
rb_funcall(argv[argc], rb_intern("append_features"), 1, module);
rb_funcall(argv[argc], rb_intern("included"), 1, module);
}
return module;
}
void
rb_obj_call_init(VALUE obj, int argc, VALUE *argv)
{
PASS_PASSED_BLOCK();
rb_funcall2(obj, idInitialize, argc, argv);
}
void
rb_extend_object(VALUE obj, VALUE module)
{
rb_include_module(rb_singleton_class(obj), module);
}
/*
* call-seq:
* extend_object(obj) => obj
*
* Extends the specified object by adding this module's constants and
* methods (which are added as singleton methods). This is the callback
* method used by <code>Object#extend</code>.
*
* module Picky
* def Picky.extend_object(o)
* if String === o
* puts "Can't add Picky to a String"
* else
* puts "Picky added to #{o.class}"
* super
* end
* end
* end
* (s = Array.new).extend Picky # Call Object.extend
* (s = "quick brown fox").extend Picky
*
* <em>produces:</em>
*
* Picky added to Array
* Can't add Picky to a String
*/
static VALUE
rb_mod_extend_object(VALUE mod, VALUE obj)
{
rb_extend_object(obj, mod);
return obj;
}
/*
* call-seq:
* obj.extend(module, ...) => obj
*
* Adds to _obj_ the instance methods from each module given as a
* parameter.
*
* module Mod
* def hello
* "Hello from Mod.\n"
* end
* end
*
* class Klass
* def hello
* "Hello from Klass.\n"
* end
* end
*
* k = Klass.new
* k.hello #=> "Hello from Klass.\n"
* k.extend(Mod) #=> #<Klass:0x401b3bc8>
* k.hello #=> "Hello from Mod.\n"
*/
static VALUE
rb_obj_extend(int argc, VALUE *argv, VALUE obj)
{
int i;
if (argc == 0) {
rb_raise(rb_eArgError, "wrong number of arguments (0 for 1)");
}
for (i = 0; i < argc; i++)
Check_Type(argv[i], T_MODULE);
while (argc--) {
rb_funcall(argv[argc], rb_intern("extend_object"), 1, obj);
rb_funcall(argv[argc], rb_intern("extended"), 1, obj);
}
return obj;
}
/*
* call-seq:
* include(module, ...) => self
*
* Invokes <code>Module.append_features</code>
* on each parameter in turn. Effectively adds the methods and constants
* in each module to the receiver.
*/
static VALUE
top_include(int argc, VALUE *argv, VALUE self)
{
rb_thread_t *th = GET_THREAD();
rb_secure(4);
if (th->top_wrapper) {
rb_warning
("main#include in the wrapped load is effective only in wrapper module");
return rb_mod_include(argc, argv, th->top_wrapper);
}
return rb_mod_include(argc, argv, rb_cObject);
}
VALUE rb_f_trace_var();
VALUE rb_f_untrace_var();
static VALUE *
errinfo_place(void)
{
rb_thread_t *th = GET_THREAD();
rb_control_frame_t *cfp = th->cfp;
rb_control_frame_t *end_cfp = RUBY_VM_END_CONTROL_FRAME(th);
while (RUBY_VM_VALID_CONTROL_FRAME_P(cfp, end_cfp)) {
if (RUBY_VM_NORMAL_ISEQ_P(cfp->iseq)) {
if (cfp->iseq->type == ISEQ_TYPE_RESCUE) {
return &cfp->dfp[-2];
}
else if (cfp->iseq->type == ISEQ_TYPE_ENSURE &&
TYPE(cfp->dfp[-2]) != T_NODE &&
!FIXNUM_P(cfp->dfp[-2])) {
return &cfp->dfp[-2];
}
}
cfp = RUBY_VM_PREVIOUS_CONTROL_FRAME(cfp);
}
return 0;
}
static VALUE
get_errinfo(void)
{
VALUE *ptr = errinfo_place();
if (ptr) {
return *ptr;
}
else {
return Qnil;
}
}
static VALUE
errinfo_getter(ID id)
{
return get_errinfo();
}
#if 0
static void
errinfo_setter(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 $!");
}
else {
VALUE *ptr = errinfo_place();
if (ptr) {
*ptr = val;
}
else {
rb_raise(rb_eRuntimeError, "errinfo_setter: not in rescue clause.");
}
}
}
#endif
VALUE
rb_errinfo(void)
{
rb_thread_t *th = GET_THREAD();
return th->errinfo;
}
void
rb_set_errinfo(VALUE err)
{
if (!NIL_P(err) && !rb_obj_is_kind_of(err, rb_eException)) {
rb_raise(rb_eTypeError, "assigning non-exception to $!");
}
GET_THREAD()->errinfo = err;
}
VALUE
rb_rubylevel_errinfo(void)
{
return get_errinfo();
}
static VALUE
errat_getter(ID id)
{
VALUE err = get_errinfo();
if (!NIL_P(err)) {
return get_backtrace(err);
}
else {
return Qnil;
}
}
static void
errat_setter(VALUE val, ID id, VALUE *var)
{
VALUE err = get_errinfo();
if (NIL_P(err)) {
rb_raise(rb_eArgError, "$! not set");
}
set_backtrace(err, val);
}
int vm_collect_local_variables_in_heap(rb_thread_t *th, VALUE *dfp, VALUE ary);
/*
* call-seq:
* local_variables => array
*
* Returns the names of the current local variables.
*
* fred = 1
* for i in 1..10
* # ...
* end
* local_variables #=> ["fred", "i"]
*/
static VALUE
rb_f_local_variables(void)
{
VALUE ary = rb_ary_new();
rb_thread_t *th = GET_THREAD();
rb_control_frame_t *cfp =
vm_get_ruby_level_caller_cfp(th, RUBY_VM_PREVIOUS_CONTROL_FRAME(th->cfp));
int i;
while (cfp) {
if (cfp->iseq) {
for (i = 0; i < cfp->iseq->local_table_size; i++) {
ID lid = cfp->iseq->local_table[i];
if (lid) {
const char *vname = rb_id2name(lid);
/* should skip temporary variable */
if (vname) {
rb_ary_push(ary, ID2SYM(lid));
}
}
}
}
if (cfp->lfp != cfp->dfp) {
/* block */
VALUE *dfp = GC_GUARDED_PTR_REF(cfp->dfp[0]);
if (vm_collect_local_variables_in_heap(th, dfp, ary)) {
break;
}
else {
while (cfp->dfp != dfp) {
cfp = RUBY_VM_PREVIOUS_CONTROL_FRAME(cfp);
}
}
}
else {
break;
}
}
return ary;
}
/*
* call-seq:
* __method__ => symbol
* __callee__ => symbol
*
* Returns the name of the current method as a Symbol.
* If called outside of a method, it returns <code>nil</code>.
*
*/
static VALUE
rb_f_method_name(void)
{
ID fname = rb_frame_callee();
if (fname) {
return ID2SYM(fname);
}
else {
return Qnil;
}
}
void
Init_eval(void)
{
/* TODO: fix position */
GET_THREAD()->vm->mark_object_ary = rb_ary_new();
rb_define_virtual_variable("$@", errat_getter, errat_setter);
rb_define_virtual_variable("$!", errinfo_getter, 0);
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("raise", rb_f_raise, -1);
rb_define_global_function("fail", rb_f_raise, -1);
rb_define_global_function("global_variables", rb_f_global_variables, 0); /* in variable.c */
rb_define_global_function("local_variables", rb_f_local_variables, 0);
rb_define_global_function("__method__", rb_f_method_name, 0);
rb_define_global_function("__callee__", rb_f_method_name, 0);
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_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");
{
extern void Init_vm_eval(void);
extern void Init_eval_method(void);
Init_vm_eval();
Init_eval_method();
}
rb_define_singleton_method(rb_cModule, "nesting", rb_mod_nesting, 0);
rb_define_singleton_method(rb_cModule, "constants", rb_mod_s_constants, -1);
rb_define_singleton_method(rb_vm_top_self(), "include", top_include, -1);
rb_define_method(rb_mKernel, "extend", rb_obj_extend, -1);
rb_define_global_function("trace_var", rb_f_trace_var, -1); /* in variable.c */
rb_define_global_function("untrace_var", rb_f_untrace_var, -1); /* in variable.c */
rb_define_virtual_variable("$SAFE", safe_getter, safe_setter);
exception_error = rb_exc_new3(rb_eFatal,
rb_obj_freeze(rb_str_new2("exception reentered")));
rb_ivar_set(exception_error, idThrowState, INT2FIX(TAG_FATAL));
OBJ_TAINT(exception_error);
OBJ_FREEZE(exception_error);
}
/* for parser */
int
rb_dvar_defined(ID id)
{
rb_thread_t *th = GET_THREAD();
rb_iseq_t *iseq;
if (th->base_block && (iseq = th->base_block->iseq)) {
while (iseq->type == ISEQ_TYPE_BLOCK ||
iseq->type == ISEQ_TYPE_RESCUE ||
iseq->type == ISEQ_TYPE_ENSURE ||
iseq->type == ISEQ_TYPE_EVAL) {
int i;
for (i = 0; i < iseq->local_table_size; i++) {
if (iseq->local_table[i] == id) {
return 1;
}
}
iseq = iseq->parent_iseq;
}
}
return 0;
}
int
rb_local_defined(ID id)
{
rb_thread_t *th = GET_THREAD();
rb_iseq_t *iseq;
if (th->base_block && th->base_block->iseq) {
int i;
iseq = th->base_block->iseq->local_iseq;
for (i=0; i<iseq->local_table_size; i++) {
if (iseq->local_table[i] == id) {
return 1;
}
}
}
return 0;
}
int
rb_parse_in_eval(void)
{
return GET_THREAD()->parse_in_eval != 0;
}
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