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vm.c
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/**********************************************************************
Vm.c -
$Author$
Copyright (C) 2004-2007 Koichi Sasada
**********************************************************************/
#define vm_exec rb_vm_exec
#include "eval_intern.h"
#include "gc.h"
#include "internal.h"
#include "internal/compile.h"
#include "internal/cont.h"
#include "internal/error.h"
#include "internal/eval.h"
#include "internal/inits.h"
#include "internal/object.h"
#include "internal/parse.h"
#include "internal/proc.h"
#include "internal/re.h"
#include "internal/symbol.h"
#include "internal/vm.h"
#include "internal/sanitizers.h"
#include "iseq.h"
#include "mjit.h"
#include "ruby/st.h"
#include "ruby/vm.h"
#include "vm_core.h"
#include "vm_callinfo.h"
#include "vm_debug.h"
#include "vm_exec.h"
#include "vm_insnhelper.h"
#include "ractor_core.h"
#include "vm_sync.h"
#include "builtin.h"
#ifndef MJIT_HEADER
#include "probes.h"
#else
#include "probes.dmyh"
#endif
#include "probes_helper.h"
VALUE rb_str_concat_literals(size_t, const VALUE*);
/* :FIXME: This #ifdef is because we build pch in case of mswin and
* not in case of other situations. That distinction might change in
* a future. We would better make it detectable in something better
* than just _MSC_VER. */
#ifdef _MSC_VER
RUBY_FUNC_EXPORTED
#else
MJIT_FUNC_EXPORTED
#endif
VALUE vm_exec(rb_execution_context_t *, bool);
PUREFUNC(static inline const VALUE *VM_EP_LEP(const VALUE *));
static inline const VALUE *
VM_EP_LEP(const VALUE *ep)
{
while (!VM_ENV_LOCAL_P(ep)) {
ep = VM_ENV_PREV_EP(ep);
}
return ep;
}
static inline const rb_control_frame_t *
rb_vm_search_cf_from_ep(const rb_execution_context_t *ec, const rb_control_frame_t *cfp, const VALUE * const ep)
{
if (!ep) {
return NULL;
}
else {
const rb_control_frame_t * const eocfp = RUBY_VM_END_CONTROL_FRAME(ec); /* end of control frame pointer */
while (cfp < eocfp) {
if (cfp->ep == ep) {
return cfp;
}
cfp = RUBY_VM_PREVIOUS_CONTROL_FRAME(cfp);
}
return NULL;
}
}
const VALUE *
rb_vm_ep_local_ep(const VALUE *ep)
{
return VM_EP_LEP(ep);
}
PUREFUNC(static inline const VALUE *VM_CF_LEP(const rb_control_frame_t * const cfp));
static inline const VALUE *
VM_CF_LEP(const rb_control_frame_t * const cfp)
{
return VM_EP_LEP(cfp->ep);
}
static inline const VALUE *
VM_CF_PREV_EP(const rb_control_frame_t * const cfp)
{
return VM_ENV_PREV_EP(cfp->ep);
}
PUREFUNC(static inline VALUE VM_CF_BLOCK_HANDLER(const rb_control_frame_t * const cfp));
static inline VALUE
VM_CF_BLOCK_HANDLER(const rb_control_frame_t * const cfp)
{
const VALUE *ep = VM_CF_LEP(cfp);
return VM_ENV_BLOCK_HANDLER(ep);
}
int
rb_vm_cframe_keyword_p(const rb_control_frame_t *cfp)
{
return VM_FRAME_CFRAME_KW_P(cfp);
}
VALUE
rb_vm_frame_block_handler(const rb_control_frame_t *cfp)
{
return VM_CF_BLOCK_HANDLER(cfp);
}
#if VM_CHECK_MODE > 0
static int
VM_CFP_IN_HEAP_P(const rb_execution_context_t *ec, const rb_control_frame_t *cfp)
{
const VALUE *start = ec->vm_stack;
const VALUE *end = (VALUE *)ec->vm_stack + ec->vm_stack_size;
VM_ASSERT(start != NULL);
if (start <= (VALUE *)cfp && (VALUE *)cfp < end) {
return FALSE;
}
else {
return TRUE;
}
}
static int
VM_EP_IN_HEAP_P(const rb_execution_context_t *ec, const VALUE *ep)
{
const VALUE *start = ec->vm_stack;
const VALUE *end = (VALUE *)ec->cfp;
VM_ASSERT(start != NULL);
if (start <= ep && ep < end) {
return FALSE;
}
else {
return TRUE;
}
}
static int
vm_ep_in_heap_p_(const rb_execution_context_t *ec, const VALUE *ep)
{
if (VM_EP_IN_HEAP_P(ec, ep)) {
VALUE envval = ep[VM_ENV_DATA_INDEX_ENV]; /* VM_ENV_ENVVAL(ep); */
if (envval != Qundef) {
const rb_env_t *env = (const rb_env_t *)envval;
VM_ASSERT(vm_assert_env(envval));
VM_ASSERT(VM_ENV_FLAGS(ep, VM_ENV_FLAG_ESCAPED));
VM_ASSERT(env->ep == ep);
}
return TRUE;
}
else {
return FALSE;
}
}
int
rb_vm_ep_in_heap_p(const VALUE *ep)
{
const rb_execution_context_t *ec = GET_EC();
if (ec->vm_stack == NULL) return TRUE;
return vm_ep_in_heap_p_(ec, ep);
}
#endif
static struct rb_captured_block *
VM_CFP_TO_CAPTURED_BLOCK(const rb_control_frame_t *cfp)
{
VM_ASSERT(!VM_CFP_IN_HEAP_P(GET_EC(), cfp));
return (struct rb_captured_block *)&cfp->self;
}
static rb_control_frame_t *
VM_CAPTURED_BLOCK_TO_CFP(const struct rb_captured_block *captured)
{
rb_control_frame_t *cfp = ((rb_control_frame_t *)((VALUE *)(captured) - 3));
VM_ASSERT(!VM_CFP_IN_HEAP_P(GET_EC(), cfp));
VM_ASSERT(sizeof(rb_control_frame_t)/sizeof(VALUE) == 7 + VM_DEBUG_BP_CHECK ? 1 : 0);
return cfp;
}
static int
VM_BH_FROM_CFP_P(VALUE block_handler, const rb_control_frame_t *cfp)
{
const struct rb_captured_block *captured = VM_CFP_TO_CAPTURED_BLOCK(cfp);
return VM_TAGGED_PTR_REF(block_handler, 0x03) == captured;
}
static VALUE
vm_passed_block_handler(rb_execution_context_t *ec)
{
VALUE block_handler = ec->passed_block_handler;
ec->passed_block_handler = VM_BLOCK_HANDLER_NONE;
vm_block_handler_verify(block_handler);
return block_handler;
}
static rb_cref_t *
vm_cref_new0(VALUE klass, rb_method_visibility_t visi, int module_func, rb_cref_t *prev_cref, int pushed_by_eval, int use_prev_prev)
{
VALUE refinements = Qnil;
int omod_shared = FALSE;
rb_cref_t *cref;
/* scope */
union {
rb_scope_visibility_t visi;
VALUE value;
} scope_visi;
scope_visi.visi.method_visi = visi;
scope_visi.visi.module_func = module_func;
/* refinements */
if (prev_cref != NULL && prev_cref != (void *)1 /* TODO: why CREF_NEXT(cref) is 1? */) {
refinements = CREF_REFINEMENTS(prev_cref);
if (!NIL_P(refinements)) {
omod_shared = TRUE;
CREF_OMOD_SHARED_SET(prev_cref);
}
}
cref = (rb_cref_t *)rb_imemo_new(imemo_cref, klass, (VALUE)(use_prev_prev ? CREF_NEXT(prev_cref) : prev_cref), scope_visi.value, refinements);
if (pushed_by_eval) CREF_PUSHED_BY_EVAL_SET(cref);
if (omod_shared) CREF_OMOD_SHARED_SET(cref);
return cref;
}
static rb_cref_t *
vm_cref_new(VALUE klass, rb_method_visibility_t visi, int module_func, rb_cref_t *prev_cref, int pushed_by_eval)
{
return vm_cref_new0(klass, visi, module_func, prev_cref, pushed_by_eval, FALSE);
}
static rb_cref_t *
vm_cref_new_use_prev(VALUE klass, rb_method_visibility_t visi, int module_func, rb_cref_t *prev_cref, int pushed_by_eval)
{
return vm_cref_new0(klass, visi, module_func, prev_cref, pushed_by_eval, TRUE);
}
static int
ref_delete_symkey(VALUE key, VALUE value, VALUE unused)
{
return SYMBOL_P(key) ? ST_DELETE : ST_CONTINUE;
}
static rb_cref_t *
vm_cref_dup(const rb_cref_t *cref)
{
VALUE klass = CREF_CLASS(cref);
const rb_scope_visibility_t *visi = CREF_SCOPE_VISI(cref);
rb_cref_t *next_cref = CREF_NEXT(cref), *new_cref;
int pushed_by_eval = CREF_PUSHED_BY_EVAL(cref);
new_cref = vm_cref_new(klass, visi->method_visi, visi->module_func, next_cref, pushed_by_eval);
if (!NIL_P(CREF_REFINEMENTS(cref))) {
VALUE ref = rb_hash_dup(CREF_REFINEMENTS(cref));
rb_hash_foreach(ref, ref_delete_symkey, Qnil);
CREF_REFINEMENTS_SET(new_cref, ref);
CREF_OMOD_SHARED_UNSET(new_cref);
}
return new_cref;
}
static rb_cref_t *
vm_cref_new_toplevel(rb_execution_context_t *ec)
{
rb_cref_t *cref = vm_cref_new(rb_cObject, METHOD_VISI_PRIVATE /* toplevel visibility is private */, FALSE, NULL, FALSE);
VALUE top_wrapper = rb_ec_thread_ptr(ec)->top_wrapper;
if (top_wrapper) {
cref = vm_cref_new(top_wrapper, METHOD_VISI_PRIVATE, FALSE, cref, FALSE);
}
return cref;
}
rb_cref_t *
rb_vm_cref_new_toplevel(void)
{
return vm_cref_new_toplevel(GET_EC());
}
static void
vm_cref_dump(const char *mesg, const rb_cref_t *cref)
{
fprintf(stderr, "vm_cref_dump: %s (%p)\n", mesg, (void *)cref);
while (cref) {
fprintf(stderr, "= cref| klass: %s\n", RSTRING_PTR(rb_class_path(CREF_CLASS(cref))));
cref = CREF_NEXT(cref);
}
}
void
rb_vm_block_ep_update(VALUE obj, const struct rb_block *dst, const VALUE *ep)
{
*((const VALUE **)&dst->as.captured.ep) = ep;
RB_OBJ_WRITTEN(obj, Qundef, VM_ENV_ENVVAL(ep));
}
static void
vm_bind_update_env(VALUE bindval, rb_binding_t *bind, VALUE envval)
{
const rb_env_t *env = (rb_env_t *)envval;
RB_OBJ_WRITE(bindval, &bind->block.as.captured.code.iseq, env->iseq);
rb_vm_block_ep_update(bindval, &bind->block, env->ep);
}
#if VM_COLLECT_USAGE_DETAILS
static void vm_collect_usage_operand(int insn, int n, VALUE op);
static void vm_collect_usage_insn(int insn);
static void vm_collect_usage_register(int reg, int isset);
#endif
static VALUE vm_make_env_object(const rb_execution_context_t *ec, rb_control_frame_t *cfp);
extern VALUE rb_vm_invoke_bmethod(rb_execution_context_t *ec, rb_proc_t *proc, VALUE self,
int argc, const VALUE *argv, int kw_splat, VALUE block_handler,
const rb_callable_method_entry_t *me);
static VALUE vm_invoke_proc(rb_execution_context_t *ec, rb_proc_t *proc, VALUE self, int argc, const VALUE *argv, int kw_splat, VALUE block_handler);
#include "vm_insnhelper.c"
#ifndef MJIT_HEADER
#include "vm_exec.c"
#include "vm_method.c"
#endif /* #ifndef MJIT_HEADER */
#include "vm_eval.c"
#ifndef MJIT_HEADER
#define PROCDEBUG 0
rb_serial_t
rb_next_class_serial(void)
{
rb_serial_t class_serial = NEXT_CLASS_SERIAL();
return class_serial;
}
VALUE rb_cRubyVM;
VALUE rb_cThread;
VALUE rb_mRubyVMFrozenCore;
VALUE rb_block_param_proxy;
#define ruby_vm_redefined_flag GET_VM()->redefined_flag
VALUE ruby_vm_const_missing_count = 0;
rb_vm_t *ruby_current_vm_ptr = NULL;
rb_ractor_t *ruby_single_main_ractor;
#ifdef RB_THREAD_LOCAL_SPECIFIER
RB_THREAD_LOCAL_SPECIFIER rb_execution_context_t *ruby_current_ec;
#ifdef __APPLE__
rb_execution_context_t *
rb_current_ec(void)
{
return ruby_current_ec;
}
void
rb_current_ec_set(rb_execution_context_t *ec)
{
ruby_current_ec = ec;
}
#endif
#else
native_tls_key_t ruby_current_ec_key;
#endif
rb_event_flag_t ruby_vm_event_flags;
rb_event_flag_t ruby_vm_event_enabled_global_flags;
unsigned int ruby_vm_event_local_num;
rb_serial_t ruby_vm_global_constant_state = 1;
rb_serial_t ruby_vm_class_serial = 1;
static const struct rb_callcache vm_empty_cc = {
.flags = T_IMEMO | (imemo_callcache << FL_USHIFT) | VM_CALLCACHE_UNMARKABLE,
.klass = Qfalse,
.cme_ = NULL,
.call_ = vm_call_general,
.aux_ = {
.v = Qfalse,
}
};
static void thread_free(void *ptr);
void
rb_vm_inc_const_missing_count(void)
{
ruby_vm_const_missing_count +=1;
}
MJIT_FUNC_EXPORTED int
rb_dtrace_setup(rb_execution_context_t *ec, VALUE klass, ID id,
struct ruby_dtrace_method_hook_args *args)
{
enum ruby_value_type type;
if (!klass) {
if (!ec) ec = GET_EC();
if (!rb_ec_frame_method_id_and_class(ec, &id, 0, &klass) || !klass)
return FALSE;
}
if (RB_TYPE_P(klass, T_ICLASS)) {
klass = RBASIC(klass)->klass;
}
else if (FL_TEST(klass, FL_SINGLETON)) {
klass = rb_attr_get(klass, id__attached__);
if (NIL_P(klass)) return FALSE;
}
type = BUILTIN_TYPE(klass);
if (type == T_CLASS || type == T_ICLASS || type == T_MODULE) {
VALUE name = rb_class_path(klass);
const char *classname, *filename;
const char *methodname = rb_id2name(id);
if (methodname && (filename = rb_source_location_cstr(&args->line_no)) != 0) {
if (NIL_P(name) || !(classname = StringValuePtr(name)))
classname = "<unknown>";
args->classname = classname;
args->methodname = methodname;
args->filename = filename;
args->klass = klass;
args->name = name;
return TRUE;
}
}
return FALSE;
}
/*
* call-seq:
* RubyVM.stat -> Hash
* RubyVM.stat(hsh) -> hsh
* RubyVM.stat(Symbol) -> Numeric
*
* Returns a Hash containing implementation-dependent counters inside the VM.
*
* This hash includes information about method/constant cache serials:
*
* {
* :global_constant_state=>481,
* :class_serial=>9029
* }
*
* The contents of the hash are implementation specific and may be changed in
* the future.
*
* This method is only expected to work on C Ruby.
*/
static VALUE
vm_stat(int argc, VALUE *argv, VALUE self)
{
static VALUE sym_global_constant_state, sym_class_serial;
VALUE arg = Qnil;
VALUE hash = Qnil, key = Qnil;
if (rb_check_arity(argc, 0, 1) == 1) {
arg = argv[0];
if (SYMBOL_P(arg))
key = arg;
else if (RB_TYPE_P(arg, T_HASH))
hash = arg;
else
rb_raise(rb_eTypeError, "non-hash or symbol given");
}
else {
hash = rb_hash_new();
}
if (sym_global_constant_state == 0) {
#define S(s) sym_##s = ID2SYM(rb_intern_const(#s))
S(global_constant_state);
S(class_serial);
#undef S
}
#define SET(name, attr) \
if (key == sym_##name) \
return SERIALT2NUM(attr); \
else if (hash != Qnil) \
rb_hash_aset(hash, sym_##name, SERIALT2NUM(attr));
SET(global_constant_state, ruby_vm_global_constant_state);
SET(class_serial, ruby_vm_class_serial);
#undef SET
if (!NIL_P(key)) { /* matched key should return above */
rb_raise(rb_eArgError, "unknown key: %"PRIsVALUE, rb_sym2str(key));
}
return hash;
}
/* control stack frame */
static void
vm_set_top_stack(rb_execution_context_t *ec, const rb_iseq_t *iseq)
{
if (iseq->body->type != ISEQ_TYPE_TOP) {
rb_raise(rb_eTypeError, "Not a toplevel InstructionSequence");
}
/* for return */
vm_push_frame(ec, iseq, VM_FRAME_MAGIC_TOP | VM_ENV_FLAG_LOCAL | VM_FRAME_FLAG_FINISH, rb_ec_thread_ptr(ec)->top_self,
VM_BLOCK_HANDLER_NONE,
(VALUE)vm_cref_new_toplevel(ec), /* cref or me */
iseq->body->iseq_encoded, ec->cfp->sp,
iseq->body->local_table_size, iseq->body->stack_max);
}
static void
vm_set_eval_stack(rb_execution_context_t *ec, const rb_iseq_t *iseq, const rb_cref_t *cref, const struct rb_block *base_block)
{
vm_push_frame(ec, iseq, VM_FRAME_MAGIC_EVAL | VM_FRAME_FLAG_FINISH,
vm_block_self(base_block), VM_GUARDED_PREV_EP(vm_block_ep(base_block)),
(VALUE)cref, /* cref or me */
iseq->body->iseq_encoded,
ec->cfp->sp, iseq->body->local_table_size,
iseq->body->stack_max);
}
static void
vm_set_main_stack(rb_execution_context_t *ec, const rb_iseq_t *iseq)
{
VALUE toplevel_binding = rb_const_get(rb_cObject, rb_intern("TOPLEVEL_BINDING"));
rb_binding_t *bind;
GetBindingPtr(toplevel_binding, bind);
RUBY_ASSERT_MESG(bind, "TOPLEVEL_BINDING is not built");
vm_set_eval_stack(ec, iseq, 0, &bind->block);
/* save binding */
if (iseq->body->local_table_size > 0) {
vm_bind_update_env(toplevel_binding, bind, vm_make_env_object(ec, ec->cfp));
}
}
rb_control_frame_t *
rb_vm_get_binding_creatable_next_cfp(const rb_execution_context_t *ec, const rb_control_frame_t *cfp)
{
while (!RUBY_VM_CONTROL_FRAME_STACK_OVERFLOW_P(ec, cfp)) {
if (cfp->iseq) {
return (rb_control_frame_t *)cfp;
}
cfp = RUBY_VM_PREVIOUS_CONTROL_FRAME(cfp);
}
return 0;
}
MJIT_FUNC_EXPORTED rb_control_frame_t *
rb_vm_get_ruby_level_next_cfp(const rb_execution_context_t *ec, const rb_control_frame_t *cfp)
{
while (!RUBY_VM_CONTROL_FRAME_STACK_OVERFLOW_P(ec, cfp)) {
if (VM_FRAME_RUBYFRAME_P(cfp)) {
return (rb_control_frame_t *)cfp;
}
cfp = RUBY_VM_PREVIOUS_CONTROL_FRAME(cfp);
}
return 0;
}
#endif /* #ifndef MJIT_HEADER */
static rb_control_frame_t *
vm_get_ruby_level_caller_cfp(const rb_execution_context_t *ec, const rb_control_frame_t *cfp)
{
if (VM_FRAME_RUBYFRAME_P(cfp)) {
return (rb_control_frame_t *)cfp;
}
cfp = RUBY_VM_PREVIOUS_CONTROL_FRAME(cfp);
while (!RUBY_VM_CONTROL_FRAME_STACK_OVERFLOW_P(ec, cfp)) {
if (VM_FRAME_RUBYFRAME_P(cfp)) {
return (rb_control_frame_t *)cfp;
}
if (VM_ENV_FLAGS(cfp->ep, VM_FRAME_FLAG_PASSED) == FALSE) {
break;
}
cfp = RUBY_VM_PREVIOUS_CONTROL_FRAME(cfp);
}
return 0;
}
MJIT_STATIC void
rb_vm_pop_cfunc_frame(void)
{
rb_execution_context_t *ec = GET_EC();
rb_control_frame_t *cfp = ec->cfp;
const rb_callable_method_entry_t *me = rb_vm_frame_method_entry(cfp);
EXEC_EVENT_HOOK(ec, RUBY_EVENT_C_RETURN, cfp->self, me->def->original_id, me->called_id, me->owner, Qnil);
RUBY_DTRACE_CMETHOD_RETURN_HOOK(ec, me->owner, me->def->original_id);
vm_pop_frame(ec, cfp, cfp->ep);
}
#ifndef MJIT_HEADER
void
rb_vm_rewind_cfp(rb_execution_context_t *ec, rb_control_frame_t *cfp)
{
/* check skipped frame */
while (ec->cfp != cfp) {
#if VMDEBUG
printf("skipped frame: %s\n", vm_frametype_name(ec->cfp));
#endif
if (VM_FRAME_TYPE(ec->cfp) != VM_FRAME_MAGIC_CFUNC) {
rb_vm_pop_frame(ec);
}
else { /* unlikely path */
rb_vm_pop_cfunc_frame();
}
}
}
/* at exit */
void
ruby_vm_at_exit(void (*func)(rb_vm_t *))
{
rb_vm_t *vm = GET_VM();
rb_at_exit_list *nl = ALLOC(rb_at_exit_list);
nl->func = func;
nl->next = vm->at_exit;
vm->at_exit = nl;
}
static void
ruby_vm_run_at_exit_hooks(rb_vm_t *vm)
{
rb_at_exit_list *l = vm->at_exit;
while (l) {
rb_at_exit_list* t = l->next;
rb_vm_at_exit_func *func = l->func;
ruby_xfree(l);
l = t;
(*func)(vm);
}
}
/* Env */
static VALUE check_env_value(const rb_env_t *env);
static int
check_env(const rb_env_t *env)
{
fprintf(stderr, "---\n");
fprintf(stderr, "envptr: %p\n", (void *)&env->ep[0]);
fprintf(stderr, "envval: %10p ", (void *)env->ep[1]);
dp(env->ep[1]);
fprintf(stderr, "ep: %10p\n", (void *)env->ep);
if (rb_vm_env_prev_env(env)) {
fprintf(stderr, ">>\n");
check_env_value(rb_vm_env_prev_env(env));
fprintf(stderr, "<<\n");
}
return 1;
}
static VALUE
check_env_value(const rb_env_t *env)
{
if (check_env(env)) {
return (VALUE)env;
}
rb_bug("invalid env");
return Qnil; /* unreachable */
}
static VALUE
vm_block_handler_escape(const rb_execution_context_t *ec, VALUE block_handler)
{
switch (vm_block_handler_type(block_handler)) {
case block_handler_type_ifunc:
case block_handler_type_iseq:
return rb_vm_make_proc(ec, VM_BH_TO_CAPT_BLOCK(block_handler), rb_cProc);
case block_handler_type_symbol:
case block_handler_type_proc:
return block_handler;
}
VM_UNREACHABLE(vm_block_handler_escape);
return Qnil;
}
static VALUE
vm_make_env_each(const rb_execution_context_t * const ec, rb_control_frame_t *const cfp)
{
const VALUE * const ep = cfp->ep;
const rb_env_t *env;
const rb_iseq_t *env_iseq;
VALUE *env_body, *env_ep;
int local_size, env_size;
if (VM_ENV_ESCAPED_P(ep)) {
return VM_ENV_ENVVAL(ep);
}
if (!VM_ENV_LOCAL_P(ep)) {
const VALUE *prev_ep = VM_ENV_PREV_EP(ep);
if (!VM_ENV_ESCAPED_P(prev_ep)) {
rb_control_frame_t *prev_cfp = RUBY_VM_PREVIOUS_CONTROL_FRAME(cfp);
while (prev_cfp->ep != prev_ep) {
prev_cfp = RUBY_VM_PREVIOUS_CONTROL_FRAME(prev_cfp);
VM_ASSERT(prev_cfp->ep != NULL);
}
vm_make_env_each(ec, prev_cfp);
VM_FORCE_WRITE_SPECIAL_CONST(&ep[VM_ENV_DATA_INDEX_SPECVAL], VM_GUARDED_PREV_EP(prev_cfp->ep));
}
}
else {
VALUE block_handler = VM_ENV_BLOCK_HANDLER(ep);
if (block_handler != VM_BLOCK_HANDLER_NONE) {
VALUE blockprocval = vm_block_handler_escape(ec, block_handler);
VM_STACK_ENV_WRITE(ep, VM_ENV_DATA_INDEX_SPECVAL, blockprocval);
}
}
if (!VM_FRAME_RUBYFRAME_P(cfp)) {
local_size = VM_ENV_DATA_SIZE;
}
else {
local_size = cfp->iseq->body->local_table_size + VM_ENV_DATA_SIZE;
}
/*
* # local variables on a stack frame (N == local_size)
* [lvar1, lvar2, ..., lvarN, SPECVAL]
* ^
* ep[0]
*
* # moved local variables
* [lvar1, lvar2, ..., lvarN, SPECVAL, Envval, BlockProcval (if needed)]
* ^ ^
* env->env[0] ep[0]
*/
env_size = local_size +
1 /* envval */;
env_body = ALLOC_N(VALUE, env_size);
MEMCPY(env_body, ep - (local_size - 1 /* specval */), VALUE, local_size);
#if 0
for (i = 0; i < local_size; i++) {
if (VM_FRAME_RUBYFRAME_P(cfp)) {
/* clear value stack for GC */
ep[-local_size + i] = 0;
}
}
#endif
env_iseq = VM_FRAME_RUBYFRAME_P(cfp) ? cfp->iseq : NULL;
env_ep = &env_body[local_size - 1 /* specval */];
env = vm_env_new(env_ep, env_body, env_size, env_iseq);
cfp->ep = env_ep;
VM_ENV_FLAGS_SET(env_ep, VM_ENV_FLAG_ESCAPED | VM_ENV_FLAG_WB_REQUIRED);
VM_STACK_ENV_WRITE(ep, 0, (VALUE)env); /* GC mark */
return (VALUE)env;
}
static VALUE
vm_make_env_object(const rb_execution_context_t *ec, rb_control_frame_t *cfp)
{
VALUE envval = vm_make_env_each(ec, cfp);
if (PROCDEBUG) {
check_env_value((const rb_env_t *)envval);
}
return envval;
}
void
rb_vm_stack_to_heap(rb_execution_context_t *ec)
{
rb_control_frame_t *cfp = ec->cfp;
while ((cfp = rb_vm_get_binding_creatable_next_cfp(ec, cfp)) != 0) {
vm_make_env_object(ec, cfp);
cfp = RUBY_VM_PREVIOUS_CONTROL_FRAME(cfp);
}
}
const rb_env_t *
rb_vm_env_prev_env(const rb_env_t *env)
{
const VALUE *ep = env->ep;
if (VM_ENV_LOCAL_P(ep)) {
return NULL;
}
else {
const VALUE *prev_ep = VM_ENV_PREV_EP(ep);
return VM_ENV_ENVVAL_PTR(prev_ep);
}
}
static int
collect_local_variables_in_iseq(const rb_iseq_t *iseq, const struct local_var_list *vars)
{
unsigned int i;
if (!iseq) return 0;
for (i = 0; i < iseq->body->local_table_size; i++) {
local_var_list_add(vars, iseq->body->local_table[i]);
}
return 1;
}
static void
collect_local_variables_in_env(const rb_env_t *env, const struct local_var_list *vars)
{
do {
if (VM_ENV_FLAGS(env->ep, VM_ENV_FLAG_ISOLATED)) break;
collect_local_variables_in_iseq(env->iseq, vars);
} while ((env = rb_vm_env_prev_env(env)) != NULL);
}
static int
vm_collect_local_variables_in_heap(const VALUE *ep, const struct local_var_list *vars)
{
if (VM_ENV_ESCAPED_P(ep)) {
collect_local_variables_in_env(VM_ENV_ENVVAL_PTR(ep), vars);
return 1;
}
else {
return 0;
}
}
VALUE
rb_vm_env_local_variables(const rb_env_t *env)
{
struct local_var_list vars;
local_var_list_init(&vars);
collect_local_variables_in_env(env, &vars);
return local_var_list_finish(&vars);
}
VALUE
rb_iseq_local_variables(const rb_iseq_t *iseq)
{
struct local_var_list vars;
local_var_list_init(&vars);
while (collect_local_variables_in_iseq(iseq, &vars)) {
iseq = iseq->body->parent_iseq;
}
return local_var_list_finish(&vars);
}
/* Proc */
static VALUE
vm_proc_create_from_captured(VALUE klass,
const struct rb_captured_block *captured,
enum rb_block_type block_type,
int8_t is_from_method, int8_t is_lambda)
{
VALUE procval = rb_proc_alloc(klass);
rb_proc_t *proc = RTYPEDDATA_DATA(procval);
VM_ASSERT(VM_EP_IN_HEAP_P(GET_EC(), captured->ep));
/* copy block */
RB_OBJ_WRITE(procval, &proc->block.as.captured.code.val, captured->code.val);
RB_OBJ_WRITE(procval, &proc->block.as.captured.self, captured->self);
rb_vm_block_ep_update(procval, &proc->block, captured->ep);
vm_block_type_set(&proc->block, block_type);
proc->is_from_method = is_from_method;
proc->is_lambda = is_lambda;
return procval;
}
void
rb_vm_block_copy(VALUE obj, const struct rb_block *dst, const struct rb_block *src)
{
/* copy block */
switch (vm_block_type(src)) {
case block_type_iseq:
case block_type_ifunc:
RB_OBJ_WRITE(obj, &dst->as.captured.self, src->as.captured.self);
RB_OBJ_WRITE(obj, &dst->as.captured.code.val, src->as.captured.code.val);
rb_vm_block_ep_update(obj, dst, src->as.captured.ep);
break;
case block_type_symbol:
RB_OBJ_WRITE(obj, &dst->as.symbol, src->as.symbol);
break;
case block_type_proc:
RB_OBJ_WRITE(obj, &dst->as.proc, src->as.proc);
break;
}
}
static VALUE
proc_create(VALUE klass, const struct rb_block *block, int8_t is_from_method, int8_t is_lambda)
{
VALUE procval = rb_proc_alloc(klass);
rb_proc_t *proc = RTYPEDDATA_DATA(procval);
VM_ASSERT(VM_EP_IN_HEAP_P(GET_EC(), vm_block_ep(block)));
rb_vm_block_copy(procval, &proc->block, block);
vm_block_type_set(&proc->block, block->type);
proc->is_from_method = is_from_method;
proc->is_lambda = is_lambda;
return procval;
}
VALUE
rb_proc_dup(VALUE self)
{
VALUE procval;
rb_proc_t *src;
GetProcPtr(self, src);
procval = proc_create(rb_cProc, &src->block, src->is_from_method, src->is_lambda);
if (RB_OBJ_SHAREABLE_P(self)) FL_SET_RAW(procval, RUBY_FL_SHAREABLE);
RB_GC_GUARD(self); /* for: body = rb_proc_dup(body) */
return procval;
}
struct collect_outer_variable_name_data {
VALUE ary;
VALUE read_only;
bool yield;
bool isolate;
};
static enum rb_id_table_iterator_result
collect_outer_variable_names(ID id, VALUE val, void *ptr)
{
struct collect_outer_variable_name_data *data = (struct collect_outer_variable_name_data *)ptr;
if (id == rb_intern("yield")) {
data->yield = true;
}
else {
if (data->isolate ||
val == Qtrue /* write */) {
if (data->ary == Qfalse) data->ary = rb_ary_new();
rb_ary_push(data->ary, rb_id2str(id));
}
else {
if (data->read_only == Qfalse) data->read_only = rb_ary_new();
rb_ary_push(data->read_only, rb_id2str(id));
}
}
return ID_TABLE_CONTINUE;
}
static const rb_env_t *
env_copy(const VALUE *src_ep, VALUE read_only_variables)
{
const rb_env_t *src_env = (rb_env_t *)VM_ENV_ENVVAL(src_ep);
VM_ASSERT(src_env->ep == src_ep);
VALUE *env_body = ZALLOC_N(VALUE, src_env->env_size); // fill with Qfalse