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ruby--ruby/eval.c
charliesome 7fafa8f376 * insns.def, vm.c, vm_insnhelper.c, vm_insnhelper.h, vm_method.c: split 
ruby_vm_global_state_version into two separate counters - one for the
  global method state and one for the global constant state. This means
  changes to constants do not affect method caches, and changes to
  methods do not affect constant caches. In particular, this means
  inclusions of modules containing constants no longer globally
  invalidate the method cache.

* class.c, eval.c, include/ruby/intern.h, insns.def, vm.c, vm_method.c:
  rename rb_clear_cache_by_class to rb_clear_method_cache_by_class

* class.c, include/ruby/intern.h, variable.c, vm_method.c: add
  rb_clear_constant_cache

* compile.c, vm_core.h, vm_insnhelper.c: rename vmstat field in
  rb_call_info_struct to method_state

* vm_method.c: rename vmstat field in struct cache_entry to method_state

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@43455 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
2013-10-29 00:52:38 +00:00

1628 lines
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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"
#include "iseq.h"
#include "gc.h"
#include "ruby/vm.h"
#include "ruby/encoding.h"
#include "internal.h"
#include "vm_core.h"
#include "probes_helper.h"
NORETURN(void rb_raise_jump(VALUE));
NODE *rb_vm_get_cref(const rb_iseq_t *, const VALUE *);
VALUE rb_eLocalJumpError;
VALUE rb_eSysStackError;
#define exception_error GET_VM()->special_exceptions[ruby_error_reenter]
#include "eval_error.c"
#include "eval_jump.c"
#define CLASS_OR_MODULE_P(obj) \
(!SPECIAL_CONST_P(obj) && \
(BUILTIN_TYPE(obj) == T_CLASS || BUILTIN_TYPE(obj) == T_MODULE))
/* Initializes the Ruby VM and builtin libraries.
* @retval 0 if succeeded.
* @retval non-zero an error occurred.
*/
int
ruby_setup(void)
{
static int initialized = 0;
int state;
if (initialized)
return 0;
initialized = 1;
ruby_init_stack((void *)&state);
Init_BareVM();
Init_heap();
PUSH_TAG();
if ((state = EXEC_TAG()) == 0) {
rb_call_inits();
ruby_prog_init();
GET_VM()->running = 1;
}
POP_TAG();
return state;
}
/* Calls ruby_setup() and check error.
*
* Prints errors and calls exit(3) if an error occurred.
*/
void
ruby_init(void)
{
int state = ruby_setup();
if (state) {
error_print();
exit(EXIT_FAILURE);
}
}
/*! Processes command line arguments and compiles the Ruby source to execute.
*
* This function does:
* \li Processes the given command line flags and arguments for ruby(1)
* \li compiles the source code from the given argument, -e or stdin, and
* \li returns the compiled source as an opaque pointer to an internal data structure
*
* @return an opaque pointer to the compiled source or an internal special value.
* @sa ruby_executable_node().
*/
void *
ruby_options(int argc, char **argv)
{
int state;
void *volatile iseq = 0;
ruby_init_stack((void *)&iseq);
PUSH_TAG();
if ((state = EXEC_TAG()) == 0) {
SAVE_ROOT_JMPBUF(GET_THREAD(), iseq = ruby_process_options(argc, argv));
}
else {
rb_clear_trace_func();
state = error_handle(state);
iseq = (void *)INT2FIX(state);
}
POP_TAG();
return iseq;
}
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();
}
/** Runs the VM finalization processes.
*
* <code>END{}</code> and procs registered by <code>Kernel.#at_exit</code> are
* executed here. See the Ruby language spec for more details.
*
* @note This function is allowed to raise an exception if an error occurred.
*/
void
ruby_finalize(void)
{
ruby_finalize_0();
ruby_finalize_1();
}
/** Destructs the VM.
*
* Runs the VM finalization processes as well as ruby_finalize(), and frees
* resources used by the VM.
*
* @param ex Default value to the return value.
* @return If an error occurred returns a non-zero. If otherwise, returns the
* given ex.
* @note This function does not raise any exception.
*/
int
ruby_cleanup(volatile int ex)
{
int state;
volatile VALUE errs[2];
rb_thread_t *th = GET_THREAD();
int nerr;
rb_threadptr_interrupt(th);
rb_threadptr_check_signal(th);
PUSH_TAG();
if ((state = EXEC_TAG()) == 0) {
SAVE_ROOT_JMPBUF(th, { RUBY_VM_CHECK_INTS(th); });
}
POP_TAG();
errs[1] = th->errinfo;
th->safe_level = 0;
ruby_init_stack(&errs[STACK_UPPER(errs, 0, 1)]);
PUSH_TAG();
if ((state = EXEC_TAG()) == 0) {
SAVE_ROOT_JMPBUF(th, ruby_finalize_0());
}
POP_TAG();
/* protect from Thread#raise */
th->status = THREAD_KILLED;
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();
/* unlock again if finalizer took mutexes. */
rb_threadptr_unlock_all_locking_mutexes(GET_THREAD());
POP_TAG();
rb_thread_stop_timer_thread(1);
#if EXIT_SUCCESS != 0 || EXIT_FAILURE != 1
switch (ex) {
#if EXIT_SUCCESS != 0
case 0: ex = EXIT_SUCCESS; break;
#endif
#if EXIT_FAILURE != 1
case 1: ex = EXIT_FAILURE; break;
#endif
}
#endif
state = 0;
for (nerr = 0; nerr < numberof(errs); ++nerr) {
VALUE err = errs[nerr];
if (!RTEST(err)) continue;
/* th->errinfo contains a NODE while break'ing */
if (RB_TYPE_P(err, T_NODE)) continue;
if (rb_obj_is_kind_of(err, rb_eSystemExit)) {
ex = sysexit_status(err);
break;
}
else if (rb_obj_is_kind_of(err, rb_eSignal)) {
VALUE sig = rb_iv_get(err, "signo");
state = NUM2INT(sig);
break;
}
else if (ex == EXIT_SUCCESS) {
ex = EXIT_FAILURE;
}
}
ruby_vm_destruct(GET_VM());
if (state) ruby_default_signal(state);
return ex;
}
static int
ruby_exec_internal(void *n)
{
volatile 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_main(iseq);
});
}
POP_TAG();
return state;
}
/*! Calls ruby_cleanup() and exits the process */
void
ruby_stop(int ex)
{
exit(ruby_cleanup(ex));
}
/*! Checks the return value of ruby_options().
* @param n return value of ruby_options().
* @param status pointer to the exit status of this process.
*
* ruby_options() sometimes returns a special value to indicate this process
* should immediately exit. This function checks if the case. Also stores the
* exit status that the caller have to pass to exit(3) into
* <code>*status</code>.
*
* @retval non-zero if the given opaque pointer is actually a compiled source.
* @retval 0 if the given value is such a special value.
*/
int
ruby_executable_node(void *n, int *status)
{
VALUE v = (VALUE)n;
int s;
switch (v) {
case Qtrue: s = EXIT_SUCCESS; break;
case Qfalse: s = EXIT_FAILURE; break;
default:
if (!FIXNUM_P(v)) return TRUE;
s = FIX2INT(v);
}
if (status) *status = s;
return FALSE;
}
/*! Runs the given compiled source and exits this process.
* @retval 0 if successfully run the source
* @retval non-zero if an error occurred.
*/
int
ruby_run_node(void *n)
{
int status;
if (!ruby_executable_node(n, &status)) {
ruby_cleanup(0);
return status;
}
return ruby_cleanup(ruby_exec_node(n));
}
/*! Runs the given compiled source */
int
ruby_exec_node(void *n)
{
ruby_init_stack((void *)&n);
return ruby_exec_internal(n);
}
/*
* 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 = rb_vm_cref();
while (cref && cref->nd_next) {
VALUE klass = cref->nd_clss;
if (!(cref->flags & NODE_FL_CREF_PUSHED_BY_EVAL) &&
!NIL_P(klass)) {
rb_ary_push(ary, klass);
}
cref = cref->nd_next;
}
return ary;
}
/*
* call-seq:
* Module.constants -> array
* Module.constants(inherited) -> array
*
* In the first form, returns an array of the names of all
* constants accessible from the point of call.
* This list includes the names of all modules and classes
* defined in the global scope.
*
* Module.constants.first(4)
* # => [:ARGF, :ARGV, :ArgumentError, :Array]
*
* Module.constants.include?(:SEEK_SET) # => false
*
* class IO
* Module.constants.include?(:SEEK_SET) # => true
* end
*
* The second form calls the instance method +constants+.
*/
static VALUE
rb_mod_s_constants(int argc, VALUE *argv, VALUE mod)
{
const NODE *cref = rb_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 (!(cref->flags & NODE_FL_CREF_PUSHED_BY_EVAL) &&
!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)
{
if (SPECIAL_CONST_P(klass)) {
noclass:
Check_Type(klass, T_CLASS);
}
if (OBJ_FROZEN(klass)) {
const char *desc;
if (FL_TEST(klass, FL_SINGLETON))
desc = "object";
else {
switch (BUILTIN_TYPE(klass)) {
case T_MODULE:
case T_ICLASS:
desc = "module";
break;
case T_CLASS:
desc = "class";
break;
default:
goto noclass;
}
}
rb_error_frozen(desc);
}
}
NORETURN(static void rb_longjmp(int, volatile VALUE));
static void
setup_exception(rb_thread_t *th, int tag, volatile VALUE mesg)
{
VALUE at;
VALUE e;
const char *file;
volatile int line = 0;
if (NIL_P(mesg)) {
mesg = th->errinfo;
if (INTERNAL_EXCEPTION_P(mesg)) JUMP_TAG(TAG_FATAL);
}
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)) {
if (mesg == sysstack_error) {
at = rb_enc_sprintf(rb_usascii_encoding(), "%s:%d", file, line);
at = rb_ary_new3(1, at);
rb_iv_set(mesg, "bt", at);
}
else {
at = get_backtrace(mesg);
if (NIL_P(at)) {
at = rb_vm_backtrace_object();
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 && line) {
warn_printf("Exception `%s' at %s:%d - %"PRIsVALUE"\n",
rb_obj_classname(th->errinfo), file, line, e);
}
else if (file) {
warn_printf("Exception `%s' at %s - %"PRIsVALUE"\n",
rb_obj_classname(th->errinfo), file, e);
}
else {
warn_printf("Exception `%s' - %"PRIsVALUE"\n",
rb_obj_classname(th->errinfo), e);
}
}
POP_TAG();
if (status == TAG_FATAL && th->errinfo == exception_error) {
th->errinfo = mesg;
}
else if (status) {
rb_threadptr_reset_raised(th);
JUMP_TAG(status);
}
}
if (rb_threadptr_set_raised(th)) {
th->errinfo = exception_error;
rb_threadptr_reset_raised(th);
JUMP_TAG(TAG_FATAL);
}
if (tag != TAG_FATAL) {
if (RUBY_DTRACE_RAISE_ENABLED()) {
RUBY_DTRACE_RAISE(rb_obj_classname(th->errinfo),
rb_sourcefile(),
rb_sourceline());
}
EXEC_EVENT_HOOK(th, RUBY_EVENT_RAISE, th->cfp->self, 0, 0, mesg);
}
}
static void
rb_longjmp(int tag, volatile VALUE mesg)
{
rb_thread_t *th = GET_THREAD();
setup_exception(th, tag, mesg);
rb_thread_raised_clear(th);
JUMP_TAG(tag);
}
static VALUE make_exception(int argc, VALUE *argv, int isstr);
void
rb_exc_raise(VALUE mesg)
{
if (!NIL_P(mesg)) {
mesg = make_exception(1, &mesg, FALSE);
}
rb_longjmp(TAG_RAISE, mesg);
}
void
rb_exc_fatal(VALUE mesg)
{
if (!NIL_P(mesg)) {
mesg = make_exception(1, &mesg, FALSE);
}
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));
UNREACHABLE;
}
static VALUE
make_exception(int argc, VALUE *argv, int isstr)
{
VALUE mesg, exc;
ID exception;
int n;
mesg = Qnil;
switch (argc) {
case 0:
break;
case 1:
exc = argv[0];
if (NIL_P(exc))
break;
if (isstr) {
mesg = rb_check_string_type(exc);
if (!NIL_P(mesg)) {
mesg = rb_exc_new3(rb_eRuntimeError, mesg);
break;
}
}
n = 0;
goto exception_call;
case 2:
case 3:
exc = argv[0];
n = 1;
exception_call:
if (exc == sysstack_error) return exc;
CONST_ID(exception, "exception");
mesg = rb_check_funcall(exc, exception, n, argv+1);
if (mesg == Qundef) {
rb_raise(rb_eTypeError, "exception class/object expected");
}
break;
default:
rb_check_arity(argc, 0, 3);
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;
}
VALUE
rb_make_exception(int argc, VALUE *argv)
{
return make_exception(argc, argv, TRUE);
}
void
rb_raise_jump(VALUE mesg)
{
rb_thread_t *th = GET_THREAD();
rb_control_frame_t *cfp = th->cfp;
VALUE klass = cfp->me->klass;
VALUE self = cfp->self;
ID mid = cfp->me->called_id;
th->cfp = RUBY_VM_PREVIOUS_CONTROL_FRAME(th->cfp);
setup_exception(th, TAG_RAISE, mesg);
EXEC_EVENT_HOOK(th, RUBY_EVENT_C_RETURN, self, mid, klass, Qnil);
rb_thread_raised_clear(th);
JUMP_TAG(TAG_RAISE);
}
void
rb_jump_tag(int tag)
{
JUMP_TAG(tag);
}
int
rb_block_given_p(void)
{
rb_thread_t *th = GET_THREAD();
if (rb_vm_control_frame_block_ptr(th->cfp)) {
return TRUE;
}
else {
return FALSE;
}
}
int
rb_iterator_p(void)
{
return rb_block_given_p();
}
VALUE rb_eThreadError;
void
rb_need_block(void)
{
if (!rb_block_given_p()) {
rb_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;
TH_PUSH_TAG(th);
if ((state = TH_EXEC_TAG()) == 0) {
retry_entry:
result = (*b_proc) (data1);
}
else {
th->cfp = cfp; /* restore */
if (state == TAG_RAISE) {
int handle = FALSE;
VALUE eclass;
va_init_list(args, data2);
while ((eclass = va_arg(args, VALUE)) != 0) {
if (rb_obj_is_kind_of(th->errinfo, eclass)) {
handle = TRUE;
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;
}
}
}
}
TH_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)
{
volatile VALUE result = Qnil;
int status;
rb_thread_t *th = GET_THREAD();
rb_control_frame_t *cfp = th->cfp;
struct rb_vm_protect_tag protect_tag;
rb_jmpbuf_t org_jmpbuf;
protect_tag.prev = th->protect_tag;
TH_PUSH_TAG(th);
th->protect_tag = &protect_tag;
MEMCPY(&org_jmpbuf, &(th)->root_jmpbuf, rb_jmpbuf_t, 1);
if ((status = TH_EXEC_TAG()) == 0) {
SAVE_ROOT_JMPBUF(th, result = (*proc) (data));
}
MEMCPY(&(th)->root_jmpbuf, &org_jmpbuf, rb_jmpbuf_t, 1);
th->protect_tag = protect_tag.prev;
TH_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;
volatile VALUE errinfo;
rb_thread_t *const th = GET_THREAD();
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 */
errinfo = th->errinfo;
(*e_proc) (data2);
th->errinfo = errinfo;
if (state)
JUMP_TAG(state);
return result;
}
static const rb_method_entry_t *
method_entry_of_iseq(rb_control_frame_t *cfp, rb_iseq_t *iseq)
{
rb_thread_t *th = GET_THREAD();
rb_control_frame_t *cfp_limit;
cfp_limit = (rb_control_frame_t *)(th->stack + th->stack_size);
while (cfp_limit > cfp) {
if (cfp->iseq == iseq)
return cfp->me;
cfp = RUBY_VM_PREVIOUS_CONTROL_FRAME(cfp);
}
return 0;
}
static ID
frame_func_id(rb_control_frame_t *cfp)
{
const rb_method_entry_t *me_local;
rb_iseq_t *iseq = cfp->iseq;
if (cfp->me) {
return cfp->me->def->original_id;
}
while (iseq) {
if (RUBY_VM_IFUNC_P(iseq)) {
NODE *ifunc = (NODE *)iseq;
if (ifunc->nd_aid) return ifunc->nd_aid;
return idIFUNC;
}
me_local = method_entry_of_iseq(cfp, iseq);
if (me_local) {
cfp->me = me_local;
return me_local->def->original_id;
}
if (iseq->defined_method_id) {
return iseq->defined_method_id;
}
if (iseq->local_iseq == iseq) {
break;
}
iseq = iseq->parent_iseq;
}
return 0;
}
static ID
frame_called_id(rb_control_frame_t *cfp)
{
const rb_method_entry_t *me_local;
rb_iseq_t *iseq = cfp->iseq;
if (cfp->me) {
return cfp->me->called_id;
}
while (iseq) {
if (RUBY_VM_IFUNC_P(iseq)) {
NODE *ifunc = (NODE *)iseq;
if (ifunc->nd_aid) return ifunc->nd_aid;
return idIFUNC;
}
me_local = method_entry_of_iseq(cfp, iseq);
if (me_local) {
cfp->me = me_local;
return me_local->called_id;
}
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)
{
return frame_called_id(GET_THREAD()->cfp);
}
static rb_control_frame_t *
previous_frame(rb_thread_t *th)
{
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 prev_cfp;
}
static ID
prev_frame_callee(void)
{
rb_control_frame_t *prev_cfp = previous_frame(GET_THREAD());
if (!prev_cfp) return 0;
return frame_called_id(prev_cfp);
}
static ID
prev_frame_func(void)
{
rb_control_frame_t *prev_cfp = previous_frame(GET_THREAD());
if (!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)
{
if (!CLASS_OR_MODULE_P(include)) {
Check_Type(include, T_CLASS);
}
rb_include_module(include, module);
return module;
}
/*
* call-seq:
* include(module, ...) -> self
*
* Invokes <code>Module.append_features</code> on each parameter in reverse order.
*/
static VALUE
rb_mod_include(int argc, VALUE *argv, VALUE module)
{
int i;
ID id_append_features, id_included;
CONST_ID(id_append_features, "append_features");
CONST_ID(id_included, "included");
for (i = 0; i < argc; i++)
Check_Type(argv[i], T_MODULE);
while (argc--) {
rb_funcall(argv[argc], id_append_features, 1, module);
rb_funcall(argv[argc], id_included, 1, module);
}
return module;
}
/*
* call-seq:
* prepend_features(mod) -> mod
*
* When this module is prepended in another, Ruby calls
* <code>prepend_features</code> in this module, passing it the
* receiving module in _mod_. Ruby's default implementation is
* to overlay 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#prepend</code>.
*/
static VALUE
rb_mod_prepend_features(VALUE module, VALUE prepend)
{
if (!CLASS_OR_MODULE_P(prepend)) {
Check_Type(prepend, T_CLASS);
}
rb_prepend_module(prepend, module);
return module;
}
/*
* call-seq:
* prepend(module, ...) -> self
*
* Invokes <code>Module.prepend_features</code> on each parameter in reverse order.
*/
static VALUE
rb_mod_prepend(int argc, VALUE *argv, VALUE module)
{
int i;
ID id_prepend_features, id_prepended;
CONST_ID(id_prepend_features, "prepend_features");
CONST_ID(id_prepended, "prepended");
for (i = 0; i < argc; i++)
Check_Type(argv[i], T_MODULE);
while (argc--) {
rb_funcall(argv[argc], id_prepend_features, 1, module);
rb_funcall(argv[argc], id_prepended, 1, module);
}
return module;
}
static VALUE
hidden_identity_hash_new()
{
VALUE hash = rb_hash_new();
rb_funcall(hash, rb_intern("compare_by_identity"), 0);
RBASIC_CLEAR_CLASS(hash); /* hide from ObjectSpace */
return hash;
}
void
rb_using_refinement(NODE *cref, VALUE klass, VALUE module)
{
VALUE iclass, c, superclass = klass;
Check_Type(klass, T_CLASS);
Check_Type(module, T_MODULE);
if (NIL_P(cref->nd_refinements)) {
cref->nd_refinements = hidden_identity_hash_new();
}
else {
if (cref->flags & NODE_FL_CREF_OMOD_SHARED) {
cref->nd_refinements = rb_hash_dup(cref->nd_refinements);
cref->flags &= ~NODE_FL_CREF_OMOD_SHARED;
}
if (!NIL_P(c = rb_hash_lookup(cref->nd_refinements, klass))) {
superclass = c;
while (c && RB_TYPE_P(c, T_ICLASS)) {
if (RBASIC(c)->klass == module) {
/* already used refinement */
return;
}
c = RCLASS_SUPER(c);
}
}
}
FL_SET(module, RMODULE_IS_OVERLAID);
c = iclass = rb_include_class_new(module, superclass);
RCLASS_REFINED_CLASS(c) = klass;
RCLASS_M_TBL(OBJ_WB_UNPROTECT(c)) = RCLASS_M_TBL(OBJ_WB_UNPROTECT(module));
module = RCLASS_SUPER(module);
while (module && module != klass) {
FL_SET(module, RMODULE_IS_OVERLAID);
c = RCLASS_SET_SUPER(c, rb_include_class_new(module, RCLASS_SUPER(c)));
RCLASS_REFINED_CLASS(c) = klass;
module = RCLASS_SUPER(module);
}
rb_hash_aset(cref->nd_refinements, klass, iclass);
}
static int
using_refinement(VALUE klass, VALUE module, VALUE arg)
{
NODE *cref = (NODE *) arg;
rb_using_refinement(cref, klass, module);
return ST_CONTINUE;
}
static void
using_module_recursive(NODE *cref, VALUE klass)
{
ID id_refinements;
VALUE super, module, refinements;
super = RCLASS_SUPER(klass);
if (super) {
using_module_recursive(cref, super);
}
switch (BUILTIN_TYPE(klass)) {
case T_MODULE:
module = klass;
break;
case T_ICLASS:
module = RBASIC(klass)->klass;
break;
default:
rb_raise(rb_eTypeError, "wrong argument type %s (expected Module)",
rb_obj_classname(klass));
break;
}
CONST_ID(id_refinements, "__refinements__");
refinements = rb_attr_get(module, id_refinements);
if (NIL_P(refinements)) return;
rb_hash_foreach(refinements, using_refinement, (VALUE) cref);
}
void
rb_using_module(NODE *cref, VALUE module)
{
Check_Type(module, T_MODULE);
using_module_recursive(cref, module);
}
VALUE
rb_refinement_module_get_refined_class(VALUE module)
{
ID id_refined_class;
CONST_ID(id_refined_class, "__refined_class__");
return rb_attr_get(module, id_refined_class);
}
static void
add_activated_refinement(VALUE activated_refinements,
VALUE klass, VALUE refinement)
{
VALUE iclass, c, superclass = klass;
if (!NIL_P(c = rb_hash_lookup(activated_refinements, klass))) {
superclass = c;
while (c && RB_TYPE_P(c, T_ICLASS)) {
if (RBASIC(c)->klass == refinement) {
/* already used refinement */
return;
}
c = RCLASS_SUPER(c);
}
}
FL_SET(refinement, RMODULE_IS_OVERLAID);
c = iclass = rb_include_class_new(refinement, superclass);
RCLASS_REFINED_CLASS(c) = klass;
refinement = RCLASS_SUPER(refinement);
while (refinement) {
FL_SET(refinement, RMODULE_IS_OVERLAID);
c = RCLASS_SET_SUPER(c, rb_include_class_new(refinement, RCLASS_SUPER(c)));
RCLASS_REFINED_CLASS(c) = klass;
refinement = RCLASS_SUPER(refinement);
}
rb_hash_aset(activated_refinements, klass, iclass);
}
VALUE rb_yield_refine_block(VALUE refinement, VALUE refinements);
/*
* call-seq:
* refine(klass) { block } -> module
*
* Refine <i>klass</i> in the receiver.
*
* Returns an overlaid module.
*/
static VALUE
rb_mod_refine(VALUE module, VALUE klass)
{
VALUE refinement;
ID id_refinements, id_activated_refinements,
id_refined_class, id_defined_at;
VALUE refinements, activated_refinements;
rb_thread_t *th = GET_THREAD();
rb_block_t *block = rb_vm_control_frame_block_ptr(th->cfp);
if (!block) {
rb_raise(rb_eArgError, "no block given");
}
if (block->proc) {
rb_raise(rb_eArgError,
"can't pass a Proc as a block to Module#refine");
}
Check_Type(klass, T_CLASS);
CONST_ID(id_refinements, "__refinements__");
refinements = rb_attr_get(module, id_refinements);
if (NIL_P(refinements)) {
refinements = hidden_identity_hash_new();
rb_ivar_set(module, id_refinements, refinements);
}
CONST_ID(id_activated_refinements, "__activated_refinements__");
activated_refinements = rb_attr_get(module, id_activated_refinements);
if (NIL_P(activated_refinements)) {
activated_refinements = hidden_identity_hash_new();
rb_ivar_set(module, id_activated_refinements,
activated_refinements);
}
refinement = rb_hash_lookup(refinements, klass);
if (NIL_P(refinement)) {
refinement = rb_module_new();
RCLASS_SET_SUPER(refinement, klass);
FL_SET(refinement, RMODULE_IS_REFINEMENT);
CONST_ID(id_refined_class, "__refined_class__");
rb_ivar_set(refinement, id_refined_class, klass);
CONST_ID(id_defined_at, "__defined_at__");
rb_ivar_set(refinement, id_defined_at, module);
rb_hash_aset(refinements, klass, refinement);
add_activated_refinement(activated_refinements, klass, refinement);
}
rb_yield_refine_block(refinement, activated_refinements);
return refinement;
}
/*
* call-seq:
* using(module) -> self
*
* Import class refinements from <i>module</i> into the current class or
* module definition.
*/
static VALUE
mod_using(VALUE self, VALUE module)
{
NODE *cref = rb_vm_cref();
rb_control_frame_t *prev_cfp = previous_frame(GET_THREAD());
if (prev_frame_func()) {
rb_raise(rb_eRuntimeError,
"Module#using is not permitted in methods");
}
if (prev_cfp && prev_cfp->self != self) {
rb_raise(rb_eRuntimeError, "Module#using is not called on self");
}
Check_Type(module, T_MODULE);
rb_using_module(cref, module);
rb_clear_method_cache_by_class(rb_cObject);
return self;
}
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;
ID id_extend_object, id_extended;
CONST_ID(id_extend_object, "extend_object");
CONST_ID(id_extended, "extended");
rb_check_arity(argc, 1, UNLIMITED_ARGUMENTS);
for (i = 0; i < argc; i++)
Check_Type(argv[i], T_MODULE);
while (argc--) {
rb_funcall(argv[argc], id_extend_object, 1, obj);
rb_funcall(argv[argc], id_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();
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);
}
/*
* call-seq:
* using(module) -> self
*
* Import class refinements from <i>module</i> into the scope where
* <code>using</code> is called.
*/
static VALUE
top_using(VALUE self, VALUE module)
{
NODE *cref = rb_vm_cref();
rb_control_frame_t *prev_cfp = previous_frame(GET_THREAD());
if (cref->nd_next || (prev_cfp && prev_cfp->me)) {
rb_raise(rb_eRuntimeError,
"main.using is permitted only at toplevel");
}
Check_Type(module, T_MODULE);
rb_using_module(cref, module);
rb_clear_method_cache_by_class(rb_cObject);
return self;
}
static VALUE *
errinfo_place(rb_thread_t *th)
{
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->ep[-2];
}
else if (cfp->iseq->type == ISEQ_TYPE_ENSURE &&
!RB_TYPE_P(cfp->ep[-2], T_NODE) &&
!FIXNUM_P(cfp->ep[-2])) {
return &cfp->ep[-2];
}
}
cfp = RUBY_VM_PREVIOUS_CONTROL_FRAME(cfp);
}
return 0;
}
static VALUE
get_thread_errinfo(rb_thread_t *th)
{
VALUE *ptr = errinfo_place(th);
if (ptr) {
return *ptr;
}
else {
return th->errinfo;
}
}
static VALUE
get_errinfo(void)
{
return get_thread_errinfo(GET_THREAD());
}
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(GET_THREAD());
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);
}
/*
* call-seq:
* __method__ -> symbol
*
* Returns the name at the definition 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 = prev_frame_func(); /* need *method* ID */
if (fname) {
return ID2SYM(fname);
}
else {
return Qnil;
}
}
/*
* call-seq:
* __callee__ -> symbol
*
* Returns the called name of the current method as a Symbol.
* If called outside of a method, it returns <code>nil</code>.
*
*/
static VALUE
rb_f_callee_name(void)
{
ID fname = prev_frame_callee(); /* need *callee* ID */
if (fname) {
return ID2SYM(fname);
}
else {
return Qnil;
}
}
/*
* call-seq:
* __dir__ -> string
*
* Returns the canonicalized absolute path of the directory of the file from
* which this method is called. It means symlinks in the path is resolved.
* If <code>__FILE__</code> is <code>nil</code>, it returns <code>nil</code>.
* The return value equals to <code>File.dirname(File.realpath(__FILE__))</code>.
*
*/
static VALUE
f_current_dirname(void)
{
VALUE base = rb_current_realfilepath();
if (NIL_P(base)) {
return Qnil;
}
base = rb_file_dirname(base);
return base;
}
void
Init_eval(void)
{
rb_define_virtual_variable("$@", errat_getter, errat_setter);
rb_define_virtual_variable("$!", errinfo_getter, 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("__method__", rb_f_method_name, 0);
rb_define_global_function("__callee__", rb_f_callee_name, 0);
rb_define_global_function("__dir__", f_current_dirname, 0);
rb_define_method(rb_cModule, "include", rb_mod_include, -1);
rb_define_method(rb_cModule, "prepend", rb_mod_prepend, -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, "prepend_features", rb_mod_prepend_features, 1);
rb_define_private_method(rb_cModule, "refine", rb_mod_refine, 1);
rb_define_private_method(rb_cModule, "using", mod_using, 1);
rb_undef_method(rb_cClass, "refine");
rb_undef_method(rb_cClass, "module_function");
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_private_method(rb_singleton_class(rb_vm_top_self()),
"include", top_include, -1);
rb_define_private_method(rb_singleton_class(rb_vm_top_self()),
"using", top_using, 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 */
exception_error = rb_exc_new3(rb_eFatal,
rb_obj_freeze(rb_str_new2("exception reentered")));
OBJ_TAINT(exception_error);
OBJ_FREEZE(exception_error);
}
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