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ruby--ruby/vm.c
svn f67c0e5671 * expand tabs. 
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@65640 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
2018-11-09 01:13:22 +00:00

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/**********************************************************************
vm.c -
$Author$
Copyright (C) 2004-2007 Koichi Sasada
**********************************************************************/
#include "internal.h"
#include "ruby/vm.h"
#include "ruby/st.h"
#define vm_exec rb_vm_exec
#include "gc.h"
#include "vm_core.h"
#include "vm_debug.h"
#include "iseq.h"
#include "eval_intern.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*);
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);
}
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;
}
}
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 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))) {
CREF_REFINEMENTS_SET(new_cref, rb_hash_dup(CREF_REFINEMENTS(cref)));
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, 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, VALUE block_handler);
static VALUE rb_block_param_proxy;
#include "mjit.h"
#include "vm_insnhelper.h"
#include "vm_exec.h"
#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();
mjit_add_class_serial(class_serial);
return class_serial;
}
VALUE rb_cRubyVM;
VALUE rb_cThread;
VALUE rb_mRubyVMFrozenCore;
#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_execution_context_t *ruby_current_execution_context_ptr = NULL;
rb_event_flag_t ruby_vm_event_flags;
rb_event_flag_t ruby_vm_event_enabled_flags;
rb_serial_t ruby_vm_global_method_state = 1;
rb_serial_t ruby_vm_global_constant_state = 1;
rb_serial_t ruby_vm_class_serial = 1;
static void thread_free(void *ptr);
void
rb_vm_inc_const_missing_count(void)
{
ruby_vm_const_missing_count +=1;
}
VALUE rb_class_path_no_cache(VALUE _klass);
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_no_cache(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_method_state=>251,
* :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_method_state, sym_global_constant_state, sym_class_serial;
VALUE arg = Qnil;
VALUE hash = Qnil, key = Qnil;
if (rb_scan_args(argc, argv, "01", &arg) == 1) {
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_method_state == 0) {
#define S(s) sym_##s = ID2SYM(rb_intern_const(#s))
S(global_method_state);
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_method_state, ruby_vm_global_method_state);
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)
{
if (RUBY_VM_CONTROL_FRAME_STACK_OVERFLOW_P(ec, cfp)) bp();
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 {
return VM_ENV_ENVVAL_PTR(VM_ENV_PREV_EP(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 {
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.self, captured->self);
RB_OBJ_WRITE(procval, &proc->block.as.captured.code.val, captured->code.val);
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);
RB_GC_GUARD(self); /* for: body = rb_proc_dup(body) */
return procval;
}
MJIT_FUNC_EXPORTED VALUE
rb_vm_make_proc_lambda(const rb_execution_context_t *ec, const struct rb_captured_block *captured, VALUE klass, int8_t is_lambda)
{
VALUE procval;
if (!VM_ENV_ESCAPED_P(captured->ep)) {
rb_control_frame_t *cfp = VM_CAPTURED_BLOCK_TO_CFP(captured);
vm_make_env_object(ec, cfp);
}
VM_ASSERT(VM_EP_IN_HEAP_P(ec, captured->ep));
VM_ASSERT(imemo_type_p(captured->code.val, imemo_iseq) ||
imemo_type_p(captured->code.val, imemo_ifunc));
procval = vm_proc_create_from_captured(klass, captured,
imemo_type(captured->code.val) == imemo_iseq ? block_type_iseq : block_type_ifunc, FALSE, is_lambda);
return procval;
}
/* Binding */
VALUE
rb_vm_make_binding(const rb_execution_context_t *ec, const rb_control_frame_t *src_cfp)
{
rb_control_frame_t *cfp = rb_vm_get_binding_creatable_next_cfp(ec, src_cfp);
rb_control_frame_t *ruby_level_cfp = rb_vm_get_ruby_level_next_cfp(ec, src_cfp);
VALUE bindval, envval;
rb_binding_t *bind;
if (cfp == 0 || ruby_level_cfp == 0) {
rb_raise(rb_eRuntimeError, "Can't create Binding Object on top of Fiber.");
}
while (1) {
envval = vm_make_env_object(ec, cfp);
if (cfp == ruby_level_cfp) {
break;
}
cfp = rb_vm_get_binding_creatable_next_cfp(ec, RUBY_VM_PREVIOUS_CONTROL_FRAME(cfp));
}
bindval = rb_binding_alloc(rb_cBinding);
GetBindingPtr(bindval, bind);
vm_bind_update_env(bindval, bind, envval);
RB_OBJ_WRITE(bindval, &bind->block.as.captured.self, cfp->self);
RB_OBJ_WRITE(bindval, &bind->block.as.captured.code.iseq, cfp->iseq);
RB_OBJ_WRITE(bindval, &bind->pathobj, ruby_level_cfp->iseq->body->location.pathobj);
bind->first_lineno = rb_vm_get_sourceline(ruby_level_cfp);
return bindval;
}
const VALUE *
rb_binding_add_dynavars(VALUE bindval, rb_binding_t *bind, int dyncount, const ID *dynvars)
{
VALUE envval, pathobj = bind->pathobj;
VALUE path = pathobj_path(pathobj);
VALUE realpath = pathobj_realpath(pathobj);
const struct rb_block *base_block;
const rb_env_t *env;
rb_execution_context_t *ec = GET_EC();
const rb_iseq_t *base_iseq, *iseq;
rb_ast_body_t ast;
NODE tmp_node;
ID minibuf[4], *dyns = minibuf;
VALUE idtmp = 0;
if (dyncount < 0) return 0;
base_block = &bind->block;
base_iseq = vm_block_iseq(base_block);
if (dyncount >= numberof(minibuf)) dyns = ALLOCV_N(ID, idtmp, dyncount + 1);
dyns[0] = dyncount;
MEMCPY(dyns + 1, dynvars, ID, dyncount);
rb_node_init(&tmp_node, NODE_SCOPE, (VALUE)dyns, 0, 0);
ast.root = &tmp_node;
ast.compile_option = 0;
ast.line_count = -1;
if (base_iseq) {
iseq = rb_iseq_new(&ast, base_iseq->body->location.label, path, realpath, base_iseq, ISEQ_TYPE_EVAL);
}
else {
VALUE tempstr = rb_fstring_lit("<temp>");
iseq = rb_iseq_new_top(&ast, tempstr, tempstr, tempstr, NULL);
}
tmp_node.nd_tbl = 0; /* reset table */
ALLOCV_END(idtmp);
vm_set_eval_stack(ec, iseq, 0, base_block);
vm_bind_update_env(bindval, bind, envval = vm_make_env_object(ec, ec->cfp));
rb_vm_pop_frame(ec);
env = (const rb_env_t *)envval;
return env->env;
}
/* C -> Ruby: block */
static inline VALUE
invoke_block(rb_execution_context_t *ec, const rb_iseq_t *iseq, VALUE self, const struct rb_captured_block *captured, const rb_cref_t *cref, VALUE type, int opt_pc)
{
int arg_size = iseq->body->param.size;
vm_push_frame(ec, iseq, type | VM_FRAME_FLAG_FINISH, self,
VM_GUARDED_PREV_EP(captured->ep),
(VALUE)cref, /* cref or method */
iseq->body->iseq_encoded + opt_pc,
ec->cfp->sp + arg_size,
iseq->body->local_table_size - arg_size,
iseq->body->stack_max);
return vm_exec(ec, TRUE);
}
static VALUE
invoke_bmethod(rb_execution_context_t *ec, const rb_iseq_t *iseq, VALUE self, const struct rb_captured_block *captured, const rb_callable_method_entry_t *me, VALUE type, int opt_pc)
{
/* bmethod */
int arg_size = iseq->body->param.size;
VALUE ret;
vm_push_frame(ec, iseq, type | VM_FRAME_FLAG_BMETHOD, self,
VM_GUARDED_PREV_EP(captured->ep),
(VALUE)me,
iseq->body->iseq_encoded + opt_pc,
ec->cfp->sp + arg_size,
iseq->body->local_table_size - arg_size,
iseq->body->stack_max);
RUBY_DTRACE_METHOD_ENTRY_HOOK(ec, me->owner, me->def->original_id);
EXEC_EVENT_HOOK(ec, RUBY_EVENT_CALL, self, me->def->original_id, me->called_id, me->owner, Qnil);
VM_ENV_FLAGS_SET(ec->cfp->ep, VM_FRAME_FLAG_FINISH);
ret = vm_exec(ec, TRUE);
EXEC_EVENT_HOOK(ec, RUBY_EVENT_RETURN, self, me->def->original_id, me->called_id, me->owner, ret);
RUBY_DTRACE_METHOD_RETURN_HOOK(ec, me->owner, me->def->original_id);
return ret;
}
ALWAYS_INLINE(static inline VALUE
invoke_iseq_block_from_c(rb_execution_context_t *ec, const struct rb_captured_block *captured,
VALUE self, int argc, const VALUE *argv, VALUE passed_block_handler,
const rb_cref_t *cref, int is_lambda, const rb_callable_method_entry_t *me));
static inline VALUE
invoke_iseq_block_from_c(rb_execution_context_t *ec, const struct rb_captured_block *captured,
VALUE self, int argc, const VALUE *argv, VALUE passed_block_handler,
const rb_cref_t *cref, int is_lambda, const rb_callable_method_entry_t *me)
{
const rb_iseq_t *iseq = rb_iseq_check(captured->code.iseq);
int i, opt_pc;
VALUE type = VM_FRAME_MAGIC_BLOCK | (is_lambda ? VM_FRAME_FLAG_LAMBDA : 0);
rb_control_frame_t *cfp = ec->cfp;
VALUE *sp = cfp->sp;
stack_check(ec);
CHECK_VM_STACK_OVERFLOW(cfp, argc);
cfp->sp = sp + argc;
for (i=0; i<argc; i++) {
sp[i] = argv[i];
}
opt_pc = vm_yield_setup_args(ec, iseq, argc, sp, passed_block_handler,
(is_lambda ? arg_setup_method : arg_setup_block));
cfp->sp = sp;
if (me == NULL) {
return invoke_block(ec, iseq, self, captured, cref, type, opt_pc);
}
else {
return invoke_bmethod(ec, iseq, self, captured, me, type, opt_pc);
}
}
static inline VALUE
invoke_block_from_c_bh(rb_execution_context_t *ec, VALUE block_handler,
int argc, const VALUE *argv,
VALUE passed_block_handler, const rb_cref_t *cref,
int is_lambda, int force_blockarg)
{
again:
switch (vm_block_handler_type(block_handler)) {
case block_handler_type_iseq:
{
const struct rb_captured_block *captured = VM_BH_TO_ISEQ_BLOCK(block_handler);
return invoke_iseq_block_from_c(ec, captured, captured->self,
argc, argv, passed_block_handler,
cref, is_lambda, NULL);
}
case block_handler_type_ifunc:
return vm_yield_with_cfunc(ec, VM_BH_TO_IFUNC_BLOCK(block_handler),
VM_BH_TO_IFUNC_BLOCK(block_handler)->self,
argc, argv, passed_block_handler, NULL);
case block_handler_type_symbol:
return vm_yield_with_symbol(ec, VM_BH_TO_SYMBOL(block_handler),
argc, argv, passed_block_handler);
case block_handler_type_proc:
if (force_blockarg == FALSE) {
is_lambda = block_proc_is_lambda(VM_BH_TO_PROC(block_handler));
}
block_handler = vm_proc_to_block_handler(VM_BH_TO_PROC(block_handler));
goto again;
}
VM_UNREACHABLE(invoke_block_from_c_splattable);
return Qundef;
}
static inline VALUE
check_block_handler(rb_execution_context_t *ec)
{
VALUE block_handler = VM_CF_BLOCK_HANDLER(ec->cfp);
vm_block_handler_verify(block_handler);
if (UNLIKELY(block_handler == VM_BLOCK_HANDLER_NONE)) {
rb_vm_localjump_error("no block given", Qnil, 0);
}
return block_handler;
}
static VALUE
vm_yield_with_cref(rb_execution_context_t *ec, int argc, const VALUE *argv, const rb_cref_t *cref, int is_lambda)
{
return invoke_block_from_c_bh(ec, check_block_handler(ec),
argc, argv, VM_BLOCK_HANDLER_NONE,
cref, is_lambda, FALSE);
}
static VALUE
vm_yield(rb_execution_context_t *ec, int argc, const VALUE *argv)
{
return invoke_block_from_c_bh(ec, check_block_handler(ec),
argc, argv, VM_BLOCK_HANDLER_NONE,
NULL, FALSE, FALSE);
}
static VALUE
vm_yield_with_block(rb_execution_context_t *ec, int argc, const VALUE *argv, VALUE block_handler)
{
return invoke_block_from_c_bh(ec, check_block_handler(ec),
argc, argv, block_handler,
NULL, FALSE, FALSE);
}
static VALUE
vm_yield_force_blockarg(rb_execution_context_t *ec, VALUE args)
{
return invoke_block_from_c_bh(ec, check_block_handler(ec), 1, &args,
VM_BLOCK_HANDLER_NONE, NULL, FALSE, TRUE);
}
ALWAYS_INLINE(static inline VALUE
invoke_block_from_c_proc(rb_execution_context_t *ec, const rb_proc_t *proc,
VALUE self, int argc, const VALUE *argv,
VALUE passed_block_handler, int is_lambda,
const rb_callable_method_entry_t *me));
static inline VALUE
invoke_block_from_c_proc(rb_execution_context_t *ec, const rb_proc_t *proc,
VALUE self, int argc, const VALUE *argv,
VALUE passed_block_handler, int is_lambda,
const rb_callable_method_entry_t *me)
{
const struct rb_block *block = &proc->block;
again:
switch (vm_block_type(block)) {
case block_type_iseq:
return invoke_iseq_block_from_c(ec, &block->as.captured, self, argc, argv, passed_block_handler, NULL, is_lambda, me);
case block_type_ifunc:
return vm_yield_with_cfunc(ec, &block->as.captured, self, argc, argv, passed_block_handler, me);
case block_type_symbol:
return vm_yield_with_symbol(ec, block->as.symbol, argc, argv, passed_block_handler);
case block_type_proc:
is_lambda = block_proc_is_lambda(block->as.proc);
block = vm_proc_block(block->as.proc);
goto again;
}
VM_UNREACHABLE(invoke_block_from_c_proc);
return Qundef;
}
static VALUE
vm_invoke_proc(rb_execution_context_t *ec, rb_proc_t *proc, VALUE self,
int argc, const VALUE *argv, VALUE passed_block_handler)
{
return invoke_block_from_c_proc(ec, proc, self, argc, argv, passed_block_handler, proc->is_lambda, NULL);
}
MJIT_FUNC_EXPORTED VALUE
rb_vm_invoke_bmethod(rb_execution_context_t *ec, rb_proc_t *proc, VALUE self,
int argc, const VALUE *argv, VALUE block_handler, const rb_callable_method_entry_t *me)
{
return invoke_block_from_c_proc(ec, proc, self, argc, argv, block_handler, TRUE, me);
}
MJIT_FUNC_EXPORTED VALUE
rb_vm_invoke_proc(rb_execution_context_t *ec, rb_proc_t *proc,
int argc, const VALUE *argv, VALUE passed_block_handler)
{
VALUE self = vm_block_self(&proc->block);
vm_block_handler_verify(passed_block_handler);
if (proc->is_from_method) {
return rb_vm_invoke_bmethod(ec, proc, self, argc, argv, passed_block_handler, NULL);
}
else {
return vm_invoke_proc(ec, proc, self, argc, argv, passed_block_handler);
}
}
/* special variable */
static rb_control_frame_t *
vm_normal_frame(const rb_execution_context_t *ec, rb_control_frame_t *cfp)
{
while (cfp->pc == 0) {
cfp = RUBY_VM_PREVIOUS_CONTROL_FRAME(cfp);
if (RUBY_VM_CONTROL_FRAME_STACK_OVERFLOW_P(ec, cfp)) {
return 0;
}
}
return cfp;
}
static VALUE
vm_cfp_svar_get(const rb_execution_context_t *ec, rb_control_frame_t *cfp, VALUE key)
{
cfp = vm_normal_frame(ec, cfp);
return lep_svar_get(ec, cfp ? VM_CF_LEP(cfp) : 0, key);
}
static void
vm_cfp_svar_set(const rb_execution_context_t *ec, rb_control_frame_t *cfp, VALUE key, const VALUE val)
{
cfp = vm_normal_frame(ec, cfp);
lep_svar_set(ec, cfp ? VM_CF_LEP(cfp) : 0, key, val);
}
static VALUE
vm_svar_get(const rb_execution_context_t *ec, VALUE key)
{
return vm_cfp_svar_get(ec, ec->cfp, key);
}
static void
vm_svar_set(const rb_execution_context_t *ec, VALUE key, VALUE val)
{
vm_cfp_svar_set(ec, ec->cfp, key, val);
}
VALUE
rb_backref_get(void)
{
return vm_svar_get(GET_EC(), VM_SVAR_BACKREF);
}
void
rb_backref_set(VALUE val)
{
vm_svar_set(GET_EC(), VM_SVAR_BACKREF, val);
}
VALUE
rb_lastline_get(void)
{
return vm_svar_get(GET_EC(), VM_SVAR_LASTLINE);
}
void
rb_lastline_set(VALUE val)
{
vm_svar_set(GET_EC(), VM_SVAR_LASTLINE, val);
}
/* misc */
/* in intern.h */
const char *
rb_sourcefile(void)
{
const rb_execution_context_t *ec = GET_EC();
const rb_control_frame_t *cfp = rb_vm_get_ruby_level_next_cfp(ec, ec->cfp);
if (cfp) {
return RSTRING_PTR(rb_iseq_path(cfp->iseq));
}
else {
return 0;
}
}
/* in intern.h */
int
rb_sourceline(void)
{
const rb_execution_context_t *ec = GET_EC();
const rb_control_frame_t *cfp = rb_vm_get_ruby_level_next_cfp(ec, ec->cfp);
if (cfp) {
return rb_vm_get_sourceline(cfp);
}
else {
return 0;
}
}
VALUE
rb_source_location(int *pline)
{
const rb_execution_context_t *ec = GET_EC();
const rb_control_frame_t *cfp = rb_vm_get_ruby_level_next_cfp(ec, ec->cfp);
if (cfp && cfp->iseq) {
if (pline) *pline = rb_vm_get_sourceline(cfp);
return rb_iseq_path(cfp->iseq);
}
else {
if (pline) *pline = 0;
return Qnil;
}
}
MJIT_FUNC_EXPORTED const char *
rb_source_location_cstr(int *pline)
{
VALUE path = rb_source_location(pline);
if (NIL_P(path)) return NULL;
return RSTRING_PTR(path);
}
rb_cref_t *
rb_vm_cref(void)
{
const rb_execution_context_t *ec = GET_EC();
const rb_control_frame_t *cfp = rb_vm_get_ruby_level_next_cfp(ec, ec->cfp);
if (cfp == NULL) {
return NULL;
}
return rb_vm_get_cref(cfp->ep);
}
rb_cref_t *
rb_vm_cref_replace_with_duplicated_cref(void)
{
const rb_execution_context_t *ec = GET_EC();
const rb_control_frame_t *cfp = rb_vm_get_ruby_level_next_cfp(ec, ec->cfp);
rb_cref_t *cref = vm_cref_replace_with_duplicated_cref(cfp->ep);
return cref;
}
const rb_cref_t *
rb_vm_cref_in_context(VALUE self, VALUE cbase)
{
const rb_execution_context_t *ec = GET_EC();
const rb_control_frame_t *cfp = rb_vm_get_ruby_level_next_cfp(ec, ec->cfp);
const rb_cref_t *cref;
if (cfp->self != self) return NULL;
if (!vm_env_cref_by_cref(cfp->ep)) return NULL;
cref = rb_vm_get_cref(cfp->ep);
if (CREF_CLASS(cref) != cbase) return NULL;
return cref;
}
#if 0
void
debug_cref(rb_cref_t *cref)
{
while (cref) {
dp(CREF_CLASS(cref));
printf("%ld\n", CREF_VISI(cref));
cref = CREF_NEXT(cref);
}
}
#endif
VALUE
rb_vm_cbase(void)
{
const rb_execution_context_t *ec = GET_EC();
const rb_control_frame_t *cfp = rb_vm_get_ruby_level_next_cfp(ec, ec->cfp);
if (cfp == 0) {
rb_raise(rb_eRuntimeError, "Can't call on top of Fiber or Thread");
}
return vm_get_cbase(cfp->ep);
}
/* jump */
static VALUE
make_localjump_error(const char *mesg, VALUE value, int reason)
{
extern VALUE rb_eLocalJumpError;
VALUE exc = rb_exc_new2(rb_eLocalJumpError, mesg);
ID id;
switch (reason) {
case TAG_BREAK:
CONST_ID(id, "break");
break;
case TAG_REDO:
CONST_ID(id, "redo");
break;
case TAG_RETRY:
CONST_ID(id, "retry");
break;
case TAG_NEXT:
CONST_ID(id, "next");
break;
case TAG_RETURN:
CONST_ID(id, "return");
break;
default:
CONST_ID(id, "noreason");
break;
}
rb_iv_set(exc, "@exit_value", value);
rb_iv_set(exc, "@reason", ID2SYM(id));
return exc;
}
MJIT_FUNC_EXPORTED void
rb_vm_localjump_error(const char *mesg, VALUE value, int reason)
{
VALUE exc = make_localjump_error(mesg, value, reason);
rb_exc_raise(exc);
}
VALUE
rb_vm_make_jump_tag_but_local_jump(int state, VALUE val)
{
const char *mesg;
switch (state) {
case TAG_RETURN:
mesg = "unexpected return";
break;
case TAG_BREAK:
mesg = "unexpected break";
break;
case TAG_NEXT:
mesg = "unexpected next";
break;
case TAG_REDO:
mesg = "unexpected redo";
val = Qnil;
break;
case TAG_RETRY:
mesg = "retry outside of rescue clause";
val = Qnil;
break;
default:
return Qnil;
}
if (val == Qundef) {
val = GET_EC()->tag->retval;
}
return make_localjump_error(mesg, val, state);
}
#if 0
void
rb_vm_jump_tag_but_local_jump(int state)
{
VALUE exc = rb_vm_make_jump_tag_but_local_jump(state, Qundef);
if (!NIL_P(exc)) rb_exc_raise(exc);
EC_JUMP_TAG(GET_EC(), state);
}
#endif
static rb_control_frame_t *
next_not_local_frame(rb_control_frame_t *cfp)
{
while (VM_ENV_LOCAL_P(cfp->ep)) {
cfp = RUBY_VM_PREVIOUS_CONTROL_FRAME(cfp);
}
return cfp;
}
NORETURN(static void vm_iter_break(rb_execution_context_t *ec, VALUE val));
static void
vm_iter_break(rb_execution_context_t *ec, VALUE val)
{
rb_control_frame_t *cfp = next_not_local_frame(ec->cfp);
const VALUE *ep = VM_CF_PREV_EP(cfp);
const rb_control_frame_t *target_cfp = rb_vm_search_cf_from_ep(ec, cfp, ep);
#if 0 /* raise LocalJumpError */
if (!target_cfp) {
rb_vm_localjump_error("unexpected break", val, TAG_BREAK);
}
#endif
ec->errinfo = (VALUE)THROW_DATA_NEW(val, target_cfp, TAG_BREAK);
EC_JUMP_TAG(ec, TAG_BREAK);
}
void
rb_iter_break(void)
{
vm_iter_break(GET_EC(), Qnil);
}
void
rb_iter_break_value(VALUE val)
{
vm_iter_break(GET_EC(), val);
}
/* optimization: redefine management */
static st_table *vm_opt_method_table = 0;
static int
vm_redefinition_check_flag(VALUE klass)
{
if (klass == rb_cInteger) return INTEGER_REDEFINED_OP_FLAG;
if (klass == rb_cFloat) return FLOAT_REDEFINED_OP_FLAG;
if (klass == rb_cString) return STRING_REDEFINED_OP_FLAG;
if (klass == rb_cArray) return ARRAY_REDEFINED_OP_FLAG;
if (klass == rb_cHash) return HASH_REDEFINED_OP_FLAG;
if (klass == rb_cSymbol) return SYMBOL_REDEFINED_OP_FLAG;
if (klass == rb_cTime) return TIME_REDEFINED_OP_FLAG;
if (klass == rb_cRegexp) return REGEXP_REDEFINED_OP_FLAG;
if (klass == rb_cNilClass) return NIL_REDEFINED_OP_FLAG;
if (klass == rb_cTrueClass) return TRUE_REDEFINED_OP_FLAG;
if (klass == rb_cFalseClass) return FALSE_REDEFINED_OP_FLAG;
if (klass == rb_cProc) return PROC_REDEFINED_OP_FLAG;
return 0;
}
static int
vm_redefinition_check_method_type(const rb_method_definition_t *def)
{
switch (def->type) {
case VM_METHOD_TYPE_CFUNC:
case VM_METHOD_TYPE_OPTIMIZED:
return TRUE;
default:
return FALSE;
}
}
static void
rb_vm_check_redefinition_opt_method(const rb_method_entry_t *me, VALUE klass)
{
st_data_t bop;
if (RB_TYPE_P(klass, T_ICLASS) && FL_TEST(klass, RICLASS_IS_ORIGIN)) {
klass = RBASIC_CLASS(klass);
}
if (vm_redefinition_check_method_type(me->def)) {
if (st_lookup(vm_opt_method_table, (st_data_t)me, &bop)) {
int flag = vm_redefinition_check_flag(klass);
ruby_vm_redefined_flag[bop] |= flag;
}
}
}
static enum rb_id_table_iterator_result
check_redefined_method(ID mid, VALUE value, void *data)
{
VALUE klass = (VALUE)data;
const rb_method_entry_t *me = (rb_method_entry_t *)value;
const rb_method_entry_t *newme = rb_method_entry(klass, mid);
if (newme != me) rb_vm_check_redefinition_opt_method(me, me->owner);
return ID_TABLE_CONTINUE;
}
void
rb_vm_check_redefinition_by_prepend(VALUE klass)
{
if (!vm_redefinition_check_flag(klass)) return;
rb_id_table_foreach(RCLASS_M_TBL(RCLASS_ORIGIN(klass)), check_redefined_method, (void *)klass);
}
static void
add_opt_method(VALUE klass, ID mid, VALUE bop)
{
const rb_method_entry_t *me = rb_method_entry_at(klass, mid);
if (me && vm_redefinition_check_method_type(me->def)) {
st_insert(vm_opt_method_table, (st_data_t)me, (st_data_t)bop);
}
else {
rb_bug("undefined optimized method: %s", rb_id2name(mid));
}
}
static void
vm_init_redefined_flag(void)
{
ID mid;
VALUE bop;
vm_opt_method_table = st_init_numtable();
#define OP(mid_, bop_) (mid = id##mid_, bop = BOP_##bop_, ruby_vm_redefined_flag[bop] = 0)
#define C(k) add_opt_method(rb_c##k, mid, bop)
OP(PLUS, PLUS), (C(Integer), C(Float), C(String), C(Array));
OP(MINUS, MINUS), (C(Integer), C(Float));
OP(MULT, MULT), (C(Integer), C(Float));
OP(DIV, DIV), (C(Integer), C(Float));
OP(MOD, MOD), (C(Integer), C(Float));
OP(Eq, EQ), (C(Integer), C(Float), C(String), C(Symbol));
OP(Eqq, EQQ), (C(Integer), C(Float), C(Symbol), C(String),
C(NilClass), C(TrueClass), C(FalseClass));
OP(LT, LT), (C(Integer), C(Float));
OP(LE, LE), (C(Integer), C(Float));
OP(GT, GT), (C(Integer), C(Float));
OP(GE, GE), (C(Integer), C(Float));
OP(LTLT, LTLT), (C(String), C(Array));
OP(AREF, AREF), (C(Array), C(Hash));
OP(ASET, ASET), (C(Array), C(Hash));
OP(Length, LENGTH), (C(Array), C(String), C(Hash));
OP(Size, SIZE), (C(Array), C(String), C(Hash));
OP(EmptyP, EMPTY_P), (C(Array), C(String), C(Hash));
OP(Succ, SUCC), (C(Integer), C(String), C(Time));
OP(EqTilde, MATCH), (C(Regexp), C(String));
OP(Freeze, FREEZE), (C(String));
OP(UMinus, UMINUS), (C(String));
OP(Max, MAX), (C(Array));
OP(Min, MIN), (C(Array));
OP(Call, CALL), (C(Proc));
OP(And, AND), (C(Integer));
OP(Or, OR), (C(Integer));
#undef C
#undef OP
}
/* for vm development */
#if VMDEBUG
static const char *
vm_frametype_name(const rb_control_frame_t *cfp)
{
switch (VM_FRAME_TYPE(cfp)) {
case VM_FRAME_MAGIC_METHOD: return "method";
case VM_FRAME_MAGIC_BLOCK: return "block";
case VM_FRAME_MAGIC_CLASS: return "class";
case VM_FRAME_MAGIC_TOP: return "top";
case VM_FRAME_MAGIC_CFUNC: return "cfunc";
case VM_FRAME_MAGIC_IFUNC: return "ifunc";
case VM_FRAME_MAGIC_EVAL: return "eval";
case VM_FRAME_MAGIC_RESCUE: return "rescue";
default:
rb_bug("unknown frame");
}
}
#endif
static VALUE
frame_return_value(const struct vm_throw_data *err)
{
if (THROW_DATA_P(err) &&
THROW_DATA_STATE(err) == TAG_BREAK &&
THROW_DATA_CONSUMED_P(err) == FALSE) {
return THROW_DATA_VAL(err);
}
else {
return Qnil;
}
}
#if 0
/* for debug */
static const char *
frame_name(const rb_control_frame_t *cfp)
{
unsigned long type = VM_FRAME_TYPE(cfp);
#define C(t) if (type == VM_FRAME_MAGIC_##t) return #t
C(METHOD);
C(BLOCK);
C(CLASS);
C(TOP);
C(CFUNC);
C(PROC);
C(IFUNC);
C(EVAL);
C(LAMBDA);
C(RESCUE);
C(DUMMY);
#undef C
return "unknown";
}
#endif
static void
hook_before_rewind(rb_execution_context_t *ec, const rb_control_frame_t *cfp, int will_finish_vm_exec, int state, struct vm_throw_data *err)
{
if (state == TAG_RAISE && RBASIC_CLASS(err) == rb_eSysStackError) {
return;
}
switch (VM_FRAME_TYPE(ec->cfp)) {
case VM_FRAME_MAGIC_METHOD:
RUBY_DTRACE_METHOD_RETURN_HOOK(ec, 0, 0);
EXEC_EVENT_HOOK_AND_POP_FRAME(ec, RUBY_EVENT_RETURN, ec->cfp->self, 0, 0, 0, frame_return_value(err));
THROW_DATA_CONSUMED_SET(err);
break;
case VM_FRAME_MAGIC_BLOCK:
if (VM_FRAME_BMETHOD_P(ec->cfp)) {
EXEC_EVENT_HOOK(ec, RUBY_EVENT_B_RETURN, ec->cfp->self, 0, 0, 0, frame_return_value(err));
if (!will_finish_vm_exec) {
/* kick RUBY_EVENT_RETURN at invoke_block_from_c() for bmethod */
EXEC_EVENT_HOOK_AND_POP_FRAME(ec, RUBY_EVENT_RETURN, ec->cfp->self,
rb_vm_frame_method_entry(ec->cfp)->def->original_id,
rb_vm_frame_method_entry(ec->cfp)->called_id,
rb_vm_frame_method_entry(ec->cfp)->owner,
frame_return_value(err));
}
THROW_DATA_CONSUMED_SET(err);
}
else {
EXEC_EVENT_HOOK_AND_POP_FRAME(ec, RUBY_EVENT_B_RETURN, ec->cfp->self, 0, 0, 0, frame_return_value(err));
THROW_DATA_CONSUMED_SET(err);
}
break;
case VM_FRAME_MAGIC_CLASS:
EXEC_EVENT_HOOK_AND_POP_FRAME(ec, RUBY_EVENT_END, ec->cfp->self, 0, 0, 0, Qnil);
break;
}
}
/* evaluator body */
/* finish
VMe (h1) finish
VM finish F1 F2
cfunc finish F1 F2 C1
rb_funcall finish F1 F2 C1
VMe finish F1 F2 C1
VM finish F1 F2 C1 F3
F1 - F3 : pushed by VM
C1 : pushed by send insn (CFUNC)
struct CONTROL_FRAME {
VALUE *pc; // cfp[0], program counter
VALUE *sp; // cfp[1], stack pointer
rb_iseq_t *iseq; // cfp[2], iseq
VALUE self; // cfp[3], self
const VALUE *ep; // cfp[4], env pointer
const void *block_code; // cfp[5], block code
};
struct rb_captured_block {
VALUE self;
VALUE *ep;
union code;
};
struct METHOD_ENV {
VALUE param0;
...
VALUE paramN;
VALUE lvar1;
...
VALUE lvarM;
VALUE cref; // ep[-2]
VALUE special; // ep[-1]
VALUE flags; // ep[ 0] == lep[0]
};
struct BLOCK_ENV {
VALUE block_param0;
...
VALUE block_paramN;
VALUE block_lvar1;
...
VALUE block_lvarM;
VALUE cref; // ep[-2]
VALUE special; // ep[-1]
VALUE flags; // ep[ 0]
};
struct CLASS_ENV {
VALUE class_lvar0;
...
VALUE class_lvarN;
VALUE cref;
VALUE prev_ep; // for frame jump
VALUE flags;
};
struct C_METHOD_CONTROL_FRAME {
VALUE *pc; // 0
VALUE *sp; // stack pointer
rb_iseq_t *iseq; // cmi
VALUE self; // ?
VALUE *ep; // ep == lep
void *code; //
};
struct C_BLOCK_CONTROL_FRAME {
VALUE *pc; // point only "finish" insn
VALUE *sp; // sp
rb_iseq_t *iseq; // ?
VALUE self; //
VALUE *ep; // ep
void *code; //
};
If mjit_exec is already called before calling vm_exec, `mjit_enable_p` should
be FALSE to avoid calling `mjit_exec` twice.
*/
static inline VALUE
vm_exec_handle_exception(rb_execution_context_t *ec, enum ruby_tag_type state,
VALUE errinfo, VALUE *initial);
MJIT_FUNC_EXPORTED VALUE
vm_exec(rb_execution_context_t *ec, int mjit_enable_p)
{
enum ruby_tag_type state;
VALUE result = Qundef;
VALUE initial = 0;
EC_PUSH_TAG(ec);
_tag.retval = Qnil;
if ((state = EC_EXEC_TAG()) == TAG_NONE) {
if (!mjit_enable_p || (result = mjit_exec(ec)) == Qundef) {
result = vm_exec_core(ec, initial);
}
goto vm_loop_start; /* fallback to the VM */
}
else {
result = ec->errinfo;
rb_ec_raised_reset(ec, RAISED_STACKOVERFLOW);
while ((result = vm_exec_handle_exception(ec, state, result, &initial)) == Qundef) {
/* caught a jump, exec the handler */
result = vm_exec_core(ec, initial);
vm_loop_start:
VM_ASSERT(ec->tag == &_tag);
/* when caught `throw`, `tag.state` is set. */
if ((state = _tag.state) == TAG_NONE) break;
_tag.state = TAG_NONE;
}
}
EC_POP_TAG();
return result;
}
static inline VALUE
vm_exec_handle_exception(rb_execution_context_t *ec, enum ruby_tag_type state,
VALUE errinfo, VALUE *initial)
{
struct vm_throw_data *err = (struct vm_throw_data *)errinfo;
for (;;) {
unsigned int i;
const struct iseq_catch_table_entry *entry;
const struct iseq_catch_table *ct;
unsigned long epc, cont_pc, cont_sp;
const rb_iseq_t *catch_iseq;
rb_control_frame_t *cfp;
VALUE type;
const rb_control_frame_t *escape_cfp;
cont_pc = cont_sp = 0;
catch_iseq = NULL;
while (ec->cfp->pc == 0 || ec->cfp->iseq == 0) {
if (UNLIKELY(VM_FRAME_TYPE(ec->cfp) == VM_FRAME_MAGIC_CFUNC)) {
EXEC_EVENT_HOOK_AND_POP_FRAME(ec, RUBY_EVENT_C_RETURN, ec->cfp->self,
rb_vm_frame_method_entry(ec->cfp)->def->original_id,
rb_vm_frame_method_entry(ec->cfp)->called_id,
rb_vm_frame_method_entry(ec->cfp)->owner, Qnil);
RUBY_DTRACE_CMETHOD_RETURN_HOOK(ec,
rb_vm_frame_method_entry(ec->cfp)->owner,
rb_vm_frame_method_entry(ec->cfp)->def->original_id);
}
rb_vm_pop_frame(ec);
}
cfp = ec->cfp;
epc = cfp->pc - cfp->iseq->body->iseq_encoded;
escape_cfp = NULL;
if (state == TAG_BREAK || state == TAG_RETURN) {
escape_cfp = THROW_DATA_CATCH_FRAME(err);
if (cfp == escape_cfp) {
if (state == TAG_RETURN) {
if (!VM_FRAME_FINISHED_P(cfp)) {
THROW_DATA_CATCH_FRAME_SET(err, cfp + 1);
THROW_DATA_STATE_SET(err, state = TAG_BREAK);
}
else {
ct = cfp->iseq->body->catch_table;
if (ct) for (i = 0; i < ct->size; i++) {
entry = &ct->entries[i];
if (entry->start < epc && entry->end >= epc) {
if (entry->type == CATCH_TYPE_ENSURE) {
catch_iseq = entry->iseq;
cont_pc = entry->cont;
cont_sp = entry->sp;
break;
}
}
}
if (catch_iseq == NULL) {
ec->errinfo = Qnil;
THROW_DATA_CATCH_FRAME_SET(err, cfp + 1);
hook_before_rewind(ec, ec->cfp, TRUE, state, err);
rb_vm_pop_frame(ec);
return THROW_DATA_VAL(err);
}
}
/* through */
}
else {
/* TAG_BREAK */
#if OPT_STACK_CACHING
*initial = THROW_DATA_VAL(err);
#else
*ec->cfp->sp++ = THROW_DATA_VAL(err);
#endif
ec->errinfo = Qnil;
return Qundef;
}
}
}
if (state == TAG_RAISE) {
ct = cfp->iseq->body->catch_table;
if (ct) for (i = 0; i < ct->size; i++) {
entry = &ct->entries[i];
if (entry->start < epc && entry->end >= epc) {
if (entry->type == CATCH_TYPE_RESCUE ||
entry->type == CATCH_TYPE_ENSURE) {
catch_iseq = entry->iseq;
cont_pc = entry->cont;
cont_sp = entry->sp;
break;
}
}
}
}
else if (state == TAG_RETRY) {
ct = cfp->iseq->body->catch_table;
if (ct) for (i = 0; i < ct->size; i++) {
entry = &ct->entries[i];
if (entry->start < epc && entry->end >= epc) {
if (entry->type == CATCH_TYPE_ENSURE) {
catch_iseq = entry->iseq;
cont_pc = entry->cont;
cont_sp = entry->sp;
break;
}
else if (entry->type == CATCH_TYPE_RETRY) {
const rb_control_frame_t *escape_cfp;
escape_cfp = THROW_DATA_CATCH_FRAME(err);
if (cfp == escape_cfp) {
cfp->pc = cfp->iseq->body->iseq_encoded + entry->cont;
ec->errinfo = Qnil;
return Qundef;
}
}
}
}
}
else if (state == TAG_BREAK && !escape_cfp) {
type = CATCH_TYPE_BREAK;
search_restart_point:
ct = cfp->iseq->body->catch_table;
if (ct) for (i = 0; i < ct->size; i++) {
entry = &ct->entries[i];
if (entry->start < epc && entry->end >= epc) {
if (entry->type == CATCH_TYPE_ENSURE) {
catch_iseq = entry->iseq;
cont_pc = entry->cont;
cont_sp = entry->sp;
break;
}
else if (entry->type == type) {
cfp->pc = cfp->iseq->body->iseq_encoded + entry->cont;
cfp->sp = vm_base_ptr(cfp) + entry->sp;
if (state != TAG_REDO) {
#if OPT_STACK_CACHING
*initial = THROW_DATA_VAL(err);
#else
*ec->cfp->sp++ = THROW_DATA_VAL(err);
#endif
}
ec->errinfo = Qnil;
VM_ASSERT(ec->tag->state == TAG_NONE);
return Qundef;
}
}
}
}
else if (state == TAG_REDO) {
type = CATCH_TYPE_REDO;
goto search_restart_point;
}
else if (state == TAG_NEXT) {
type = CATCH_TYPE_NEXT;
goto search_restart_point;
}
else {
ct = cfp->iseq->body->catch_table;
if (ct) for (i = 0; i < ct->size; i++) {
entry = &ct->entries[i];
if (entry->start < epc && entry->end >= epc) {
if (entry->type == CATCH_TYPE_ENSURE) {
catch_iseq = entry->iseq;
cont_pc = entry->cont;
cont_sp = entry->sp;
break;
}
}
}
}
if (catch_iseq != NULL) { /* found catch table */
/* enter catch scope */
const int arg_size = 1;
rb_iseq_check(catch_iseq);
cfp->sp = vm_base_ptr(cfp) + cont_sp;
cfp->pc = cfp->iseq->body->iseq_encoded + cont_pc;
/* push block frame */
cfp->sp[0] = (VALUE)err;
vm_push_frame(ec, catch_iseq, VM_FRAME_MAGIC_RESCUE,
cfp->self,
VM_GUARDED_PREV_EP(cfp->ep),
0, /* cref or me */
catch_iseq->body->iseq_encoded,
cfp->sp + arg_size /* push value */,
catch_iseq->body->local_table_size - arg_size,
catch_iseq->body->stack_max);
state = 0;
ec->tag->state = TAG_NONE;
ec->errinfo = Qnil;
return Qundef;
}
else {
hook_before_rewind(ec, ec->cfp, FALSE, state, err);
if (VM_FRAME_FINISHED_P(ec->cfp)) {
rb_vm_pop_frame(ec);
ec->errinfo = (VALUE)err;
ec->tag = ec->tag->prev;
EC_JUMP_TAG(ec, state);
}
else {
rb_vm_pop_frame(ec);
}
}
}
}
/* misc */
VALUE
rb_iseq_eval(const rb_iseq_t *iseq)
{
rb_execution_context_t *ec = GET_EC();
VALUE val;
vm_set_top_stack(ec, iseq);
val = vm_exec(ec, TRUE);
return val;
}
VALUE
rb_iseq_eval_main(const rb_iseq_t *iseq)
{
rb_execution_context_t *ec = GET_EC();
VALUE val;
vm_set_main_stack(ec, iseq);
val = vm_exec(ec, TRUE);
return val;
}
int
rb_vm_control_frame_id_and_class(const rb_control_frame_t *cfp, ID *idp, ID *called_idp, VALUE *klassp)
{
const rb_callable_method_entry_t *me = rb_vm_frame_method_entry(cfp);
if (me) {
if (idp) *idp = me->def->original_id;
if (called_idp) *called_idp = me->called_id;
if (klassp) *klassp = me->owner;
return TRUE;
}
else {
return FALSE;
}
}
int
rb_ec_frame_method_id_and_class(const rb_execution_context_t *ec, ID *idp, ID *called_idp, VALUE *klassp)
{
return rb_vm_control_frame_id_and_class(ec->cfp, idp, called_idp, klassp);
}
RUBY_FUNC_EXPORTED int
rb_frame_method_id_and_class(ID *idp, VALUE *klassp)
{
return rb_ec_frame_method_id_and_class(GET_EC(), idp, 0, klassp);
}
VALUE
rb_vm_call_cfunc(VALUE recv, VALUE (*func)(VALUE), VALUE arg,
VALUE block_handler, VALUE filename)
{
rb_execution_context_t *ec = GET_EC();
const rb_control_frame_t *reg_cfp = ec->cfp;
const rb_iseq_t *iseq = rb_iseq_new(0, filename, filename, Qnil, 0, ISEQ_TYPE_TOP);
VALUE val;
vm_push_frame(ec, iseq, VM_FRAME_MAGIC_TOP | VM_ENV_FLAG_LOCAL | VM_FRAME_FLAG_FINISH,
recv, block_handler,
(VALUE)vm_cref_new_toplevel(ec), /* cref or me */
0, reg_cfp->sp, 0, 0);
val = (*func)(arg);
rb_vm_pop_frame(ec);
return val;
}
/* vm */
void rb_vm_trace_mark_event_hooks(rb_hook_list_t *hooks);
void
rb_vm_mark(void *ptr)
{
RUBY_MARK_ENTER("vm");
RUBY_GC_INFO("-------------------------------------------------\n");
if (ptr) {
rb_vm_t *vm = ptr;
rb_thread_t *th = 0;
list_for_each(&vm->living_threads, th, vmlt_node) {
rb_gc_mark(th->self);
}
rb_gc_mark(vm->thgroup_default);
rb_gc_mark(vm->mark_object_ary);
rb_gc_mark(vm->load_path);
rb_gc_mark(vm->load_path_snapshot);
RUBY_MARK_UNLESS_NULL(vm->load_path_check_cache);
rb_gc_mark(vm->expanded_load_path);
rb_gc_mark(vm->loaded_features);
rb_gc_mark(vm->loaded_features_snapshot);
rb_gc_mark(vm->top_self);
RUBY_MARK_UNLESS_NULL(vm->coverages);
rb_gc_mark(vm->defined_module_hash);
if (vm->loading_table) {
rb_mark_tbl(vm->loading_table);
}
rb_vm_trace_mark_event_hooks(&vm->event_hooks);
rb_gc_mark_values(RUBY_NSIG, vm->trap_list.cmd);
mjit_mark();
}
RUBY_MARK_LEAVE("vm");
}
#undef rb_vm_register_special_exception
void
rb_vm_register_special_exception_str(enum ruby_special_exceptions sp, VALUE cls, VALUE mesg)
{
rb_vm_t *vm = GET_VM();
VALUE exc = rb_exc_new3(cls, rb_obj_freeze(mesg));
OBJ_TAINT(exc);
OBJ_FREEZE(exc);
((VALUE *)vm->special_exceptions)[sp] = exc;
rb_gc_register_mark_object(exc);
}
int
rb_vm_add_root_module(ID id, VALUE module)
{
rb_vm_t *vm = GET_VM();
rb_hash_aset(vm->defined_module_hash, ID2SYM(id), module);
return TRUE;
}
static int
free_loading_table_entry(st_data_t key, st_data_t value, st_data_t arg)
{
xfree((char *)key);
return ST_DELETE;
}
int
ruby_vm_destruct(rb_vm_t *vm)
{
RUBY_FREE_ENTER("vm");
if (vm) {
rb_thread_t *th = vm->main_thread;
struct rb_objspace *objspace = vm->objspace;
vm->main_thread = 0;
if (th) {
rb_fiber_reset_root_local_storage(th);
thread_free(th);
}
rb_vm_living_threads_init(vm);
ruby_vm_run_at_exit_hooks(vm);
if (vm->loading_table) {
st_foreach(vm->loading_table, free_loading_table_entry, 0);
st_free_table(vm->loading_table);
vm->loading_table = 0;
}
if (vm->frozen_strings) {
st_free_table(vm->frozen_strings);
vm->frozen_strings = 0;
}
rb_vm_gvl_destroy(vm);
RB_ALTSTACK_FREE(vm->main_altstack);
if (objspace) {
rb_objspace_free(objspace);
}
/* after freeing objspace, you *can't* use ruby_xfree() */
ruby_mimfree(vm);
ruby_current_vm_ptr = NULL;
}
RUBY_FREE_LEAVE("vm");
return 0;
}
static size_t
vm_memsize(const void *ptr)
{
const rb_vm_t *vmobj = ptr;
size_t size = sizeof(rb_vm_t);
size += vmobj->living_thread_num * sizeof(rb_thread_t);
if (vmobj->defined_strings) {
size += DEFINED_EXPR * sizeof(VALUE);
}
return size;
}
static const rb_data_type_t vm_data_type = {
"VM",
{NULL, NULL, vm_memsize,},
0, 0, RUBY_TYPED_FREE_IMMEDIATELY
};
static VALUE
vm_default_params(void)
{
rb_vm_t *vm = GET_VM();
VALUE result = rb_hash_new();
#define SET(name) rb_hash_aset(result, ID2SYM(rb_intern(#name)), SIZET2NUM(vm->default_params.name));
SET(thread_vm_stack_size);
SET(thread_machine_stack_size);
SET(fiber_vm_stack_size);
SET(fiber_machine_stack_size);
#undef SET
rb_obj_freeze(result);
return result;
}
static size_t
get_param(const char *name, size_t default_value, size_t min_value)
{
const char *envval;
size_t result = default_value;
if ((envval = getenv(name)) != 0) {
long val = atol(envval);
if (val < (long)min_value) {
val = (long)min_value;
}
result = (size_t)(((val -1 + RUBY_VM_SIZE_ALIGN) / RUBY_VM_SIZE_ALIGN) * RUBY_VM_SIZE_ALIGN);
}
if (0) fprintf(stderr, "%s: %"PRIuSIZE"\n", name, result); /* debug print */
return result;
}
static void
check_machine_stack_size(size_t *sizep)
{
#ifdef PTHREAD_STACK_MIN
size_t size = *sizep;
#endif
#ifdef PTHREAD_STACK_MIN
if (size < PTHREAD_STACK_MIN) {
*sizep = PTHREAD_STACK_MIN * 2;
}
#endif
}
static void
vm_default_params_setup(rb_vm_t *vm)
{
vm->default_params.thread_vm_stack_size =
get_param("RUBY_THREAD_VM_STACK_SIZE",
RUBY_VM_THREAD_VM_STACK_SIZE,
RUBY_VM_THREAD_VM_STACK_SIZE_MIN);
vm->default_params.thread_machine_stack_size =
get_param("RUBY_THREAD_MACHINE_STACK_SIZE",
RUBY_VM_THREAD_MACHINE_STACK_SIZE,
RUBY_VM_THREAD_MACHINE_STACK_SIZE_MIN);
vm->default_params.fiber_vm_stack_size =
get_param("RUBY_FIBER_VM_STACK_SIZE",
RUBY_VM_FIBER_VM_STACK_SIZE,
RUBY_VM_FIBER_VM_STACK_SIZE_MIN);
vm->default_params.fiber_machine_stack_size =
get_param("RUBY_FIBER_MACHINE_STACK_SIZE",
RUBY_VM_FIBER_MACHINE_STACK_SIZE,
RUBY_VM_FIBER_MACHINE_STACK_SIZE_MIN);
/* environment dependent check */
check_machine_stack_size(&vm->default_params.thread_machine_stack_size);
check_machine_stack_size(&vm->default_params.fiber_machine_stack_size);
}
static void
vm_init2(rb_vm_t *vm)
{
MEMZERO(vm, rb_vm_t, 1);
rb_vm_living_threads_init(vm);
vm->thread_report_on_exception = 1;
vm->src_encoding_index = -1;
vm_default_params_setup(vm);
}
/* Thread */
#define USE_THREAD_DATA_RECYCLE 1
#if USE_THREAD_DATA_RECYCLE
#define RECYCLE_MAX 64
static VALUE *thread_recycle_stack_slot[RECYCLE_MAX];
static int thread_recycle_stack_count = 0;
#endif /* USE_THREAD_DATA_RECYCLE */
VALUE *
rb_thread_recycle_stack(size_t size)
{
#if USE_THREAD_DATA_RECYCLE
if (thread_recycle_stack_count > 0) {
/* TODO: check stack size if stack sizes are variable */
return thread_recycle_stack_slot[--thread_recycle_stack_count];
}
#endif /* USE_THREAD_DATA_RECYCLE */
return ALLOC_N(VALUE, size);
}
void
rb_thread_recycle_stack_release(VALUE *stack)
{
VM_ASSERT(stack != NULL);
#if USE_THREAD_DATA_RECYCLE
if (thread_recycle_stack_count < RECYCLE_MAX) {
thread_recycle_stack_slot[thread_recycle_stack_count++] = stack;
return;
}
#endif
ruby_xfree(stack);
}
void
rb_execution_context_mark(const rb_execution_context_t *ec)
{
#if VM_CHECK_MODE > 0
void rb_ec_verify(const rb_execution_context_t *ec); /* cont.c */
rb_ec_verify(ec);
#endif
/* mark VM stack */
if (ec->vm_stack) {
VALUE *p = ec->vm_stack;
VALUE *sp = ec->cfp->sp;
rb_control_frame_t *cfp = ec->cfp;
rb_control_frame_t *limit_cfp = (void *)(ec->vm_stack + ec->vm_stack_size);
rb_gc_mark_values((long)(sp - p), p);
while (cfp != limit_cfp) {
const VALUE *ep = cfp->ep;
VM_ASSERT(!!VM_ENV_FLAGS(ep, VM_ENV_FLAG_ESCAPED) == vm_ep_in_heap_p_(ec, ep));
rb_gc_mark(cfp->self);
rb_gc_mark((VALUE)cfp->iseq);
rb_gc_mark((VALUE)cfp->block_code);
if (!VM_ENV_LOCAL_P(ep)) {
const VALUE *prev_ep = VM_ENV_PREV_EP(ep);
if (VM_ENV_FLAGS(prev_ep, VM_ENV_FLAG_ESCAPED)) {
rb_gc_mark(prev_ep[VM_ENV_DATA_INDEX_ENV]);
}
}
cfp = RUBY_VM_PREVIOUS_CONTROL_FRAME(cfp);
}
}
/* mark machine stack */
if (ec->machine.stack_start && ec->machine.stack_end &&
ec != GET_EC() /* marked for current ec at the first stage of marking */
) {
rb_gc_mark_machine_stack(ec);
rb_gc_mark_locations((VALUE *)&ec->machine.regs,
(VALUE *)(&ec->machine.regs) +
sizeof(ec->machine.regs) / sizeof(VALUE));
}
RUBY_MARK_UNLESS_NULL(ec->errinfo);
RUBY_MARK_UNLESS_NULL(ec->root_svar);
rb_mark_tbl(ec->local_storage);
RUBY_MARK_UNLESS_NULL(ec->local_storage_recursive_hash);
RUBY_MARK_UNLESS_NULL(ec->local_storage_recursive_hash_for_trace);
RUBY_MARK_UNLESS_NULL(ec->private_const_reference);
}
void rb_fiber_mark_self(rb_fiber_t *fib);
void rb_threadptr_root_fiber_setup(rb_thread_t *th);
void rb_threadptr_root_fiber_release(rb_thread_t *th);
static void
thread_mark(void *ptr)
{
rb_thread_t *th = ptr;
RUBY_MARK_ENTER("thread");
rb_fiber_mark_self(th->ec->fiber_ptr);
/* mark ruby objects */
switch (th->invoke_type) {
case thread_invoke_type_proc:
RUBY_MARK_UNLESS_NULL(th->invoke_arg.proc.proc);
RUBY_MARK_UNLESS_NULL(th->invoke_arg.proc.args);
break;
case thread_invoke_type_func:
rb_gc_mark_maybe((VALUE)th->invoke_arg.func.arg);
break;
default:
break;
}
RUBY_MARK_UNLESS_NULL(th->thgroup);
RUBY_MARK_UNLESS_NULL(th->value);
RUBY_MARK_UNLESS_NULL(th->pending_interrupt_queue);
RUBY_MARK_UNLESS_NULL(th->pending_interrupt_mask_stack);
RUBY_MARK_UNLESS_NULL(th->top_self);
RUBY_MARK_UNLESS_NULL(th->top_wrapper);
if (th->root_fiber) rb_fiber_mark_self(th->root_fiber);
RUBY_MARK_UNLESS_NULL(th->stat_insn_usage);
RUBY_MARK_UNLESS_NULL(th->last_status);
RUBY_MARK_UNLESS_NULL(th->locking_mutex);
RUBY_MARK_UNLESS_NULL(th->name);
RUBY_MARK_LEAVE("thread");
}
static void
thread_free(void *ptr)
{
rb_thread_t *th = ptr;
RUBY_FREE_ENTER("thread");
if (th->locking_mutex != Qfalse) {
rb_bug("thread_free: locking_mutex must be NULL (%p:%p)", (void *)th, (void *)th->locking_mutex);
}
if (th->keeping_mutexes != NULL) {
rb_bug("thread_free: keeping_mutexes must be NULL (%p:%p)", (void *)th, (void *)th->keeping_mutexes);
}
rb_threadptr_root_fiber_release(th);
if (th->vm && th->vm->main_thread == th) {
RUBY_GC_INFO("main thread\n");
}
else {
ruby_xfree(ptr);
}
RUBY_FREE_LEAVE("thread");
}
static size_t
thread_memsize(const void *ptr)
{
const rb_thread_t *th = ptr;
size_t size = sizeof(rb_thread_t);
if (!th->root_fiber) {
size += th->ec->vm_stack_size * sizeof(VALUE);
}
if (th->ec->local_storage) {
size += st_memsize(th->ec->local_storage);
}
return size;
}
#define thread_data_type ruby_threadptr_data_type
const rb_data_type_t ruby_threadptr_data_type = {
"VM/thread",
{
thread_mark,
thread_free,
thread_memsize,
},
0, 0, RUBY_TYPED_FREE_IMMEDIATELY
};
VALUE
rb_obj_is_thread(VALUE obj)
{
if (rb_typeddata_is_kind_of(obj, &thread_data_type)) {
return Qtrue;
}
else {
return Qfalse;
}
}
static VALUE
thread_alloc(VALUE klass)
{
VALUE obj;
rb_thread_t *th;
obj = TypedData_Make_Struct(klass, rb_thread_t, &thread_data_type, th);
return obj;
}
static void
th_init(rb_thread_t *th, VALUE self)
{
th->self = self;
rb_threadptr_root_fiber_setup(th);
{
/* vm_stack_size is word number.
* th->vm->default_params.thread_vm_stack_size is byte size. */
size_t size = th->vm->default_params.thread_vm_stack_size / sizeof(VALUE);
ec_set_vm_stack(th->ec, rb_thread_recycle_stack(size), size);
}
th->ec->cfp = (void *)(th->ec->vm_stack + th->ec->vm_stack_size);
vm_push_frame(th->ec, 0 /* dummy iseq */, VM_FRAME_MAGIC_DUMMY | VM_ENV_FLAG_LOCAL | VM_FRAME_FLAG_FINISH | VM_FRAME_FLAG_CFRAME /* dummy frame */,
Qnil /* dummy self */, VM_BLOCK_HANDLER_NONE /* dummy block ptr */,
0 /* dummy cref/me */,
0 /* dummy pc */, th->ec->vm_stack, 0, 0);
th->status = THREAD_RUNNABLE;
th->last_status = Qnil;
th->ec->errinfo = Qnil;
th->ec->root_svar = Qfalse;
th->ec->local_storage_recursive_hash = Qnil;
th->ec->local_storage_recursive_hash_for_trace = Qnil;
#ifdef NON_SCALAR_THREAD_ID
th->thread_id_string[0] = '\0';
#endif
#if OPT_CALL_THREADED_CODE
th->retval = Qundef;
#endif
th->name = Qnil;
th->report_on_exception = th->vm->thread_report_on_exception;
}
static VALUE
ruby_thread_init(VALUE self)
{
rb_thread_t *th = rb_thread_ptr(self);
rb_vm_t *vm = GET_THREAD()->vm;
th->vm = vm;
th_init(th, self);
rb_ivar_set(self, rb_intern("locals"), rb_hash_new());
th->top_wrapper = 0;
th->top_self = rb_vm_top_self();
th->ec->root_svar = Qfalse;
return self;
}
VALUE
rb_thread_alloc(VALUE klass)
{
VALUE self = thread_alloc(klass);
ruby_thread_init(self);
return self;
}
static void
vm_define_method(VALUE obj, ID id, VALUE iseqval, int is_singleton)
{
VALUE klass;
rb_method_visibility_t visi;
rb_cref_t *cref = rb_vm_cref();
if (!is_singleton) {
klass = CREF_CLASS(cref);
visi = rb_scope_visibility_get();
}
else { /* singleton */
klass = rb_singleton_class(obj); /* class and frozen checked in this API */
visi = METHOD_VISI_PUBLIC;
}
if (NIL_P(klass)) {
rb_raise(rb_eTypeError, "no class/module to add method");
}
rb_add_method_iseq(klass, id, (const rb_iseq_t *)iseqval, cref, visi);
if (!is_singleton && rb_scope_module_func_check()) {
klass = rb_singleton_class(klass);
rb_add_method_iseq(klass, id, (const rb_iseq_t *)iseqval, cref, METHOD_VISI_PUBLIC);
}
}
#define REWIND_CFP(expr) do { \
rb_execution_context_t *ec__ = GET_EC(); \
VALUE *const curr_sp = (ec__->cfp++)->sp; \
VALUE *const saved_sp = ec__->cfp->sp; \
ec__->cfp->sp = curr_sp; \
expr; \
(ec__->cfp--)->sp = saved_sp; \
} while (0)
static VALUE
m_core_define_method(VALUE self, VALUE sym, VALUE iseqval)
{
REWIND_CFP({
vm_define_method(Qnil, SYM2ID(sym), iseqval, FALSE);
});
return sym;
}
static VALUE
m_core_define_singleton_method(VALUE self, VALUE cbase, VALUE sym, VALUE iseqval)
{
REWIND_CFP({
vm_define_method(cbase, SYM2ID(sym), iseqval, TRUE);
});
return sym;
}
static VALUE
m_core_set_method_alias(VALUE self, VALUE cbase, VALUE sym1, VALUE sym2)
{
REWIND_CFP({
rb_alias(cbase, SYM2ID(sym1), SYM2ID(sym2));
});
return Qnil;
}
static VALUE
m_core_set_variable_alias(VALUE self, VALUE sym1, VALUE sym2)
{
REWIND_CFP({
rb_alias_variable(SYM2ID(sym1), SYM2ID(sym2));
});
return Qnil;
}
static VALUE
m_core_undef_method(VALUE self, VALUE cbase, VALUE sym)
{
REWIND_CFP({
rb_undef(cbase, SYM2ID(sym));
rb_clear_method_cache_by_class(self);
});
return Qnil;
}
static VALUE
m_core_set_postexe(VALUE self)
{
rb_set_end_proc(rb_call_end_proc, rb_block_proc());
return Qnil;
}
static VALUE core_hash_merge_kwd(VALUE hash, VALUE kw);
static VALUE
core_hash_merge(VALUE hash, long argc, const VALUE *argv)
{
Check_Type(hash, T_HASH);
VM_ASSERT(argc % 2 == 0);
rb_hash_bulk_insert(argc, argv, hash);
return hash;
}
static VALUE
m_core_hash_merge_ptr(int argc, VALUE *argv, VALUE recv)
{
VALUE hash = argv[0];
REWIND_CFP(core_hash_merge(hash, argc-1, argv+1));
return hash;
}
static void
kw_check_symbol(VALUE key)
{
if (!SYMBOL_P(key)) {
rb_raise(rb_eTypeError, "hash key %+"PRIsVALUE" is not a Symbol",
key);
}
}
static int
kwmerge_i(VALUE key, VALUE value, VALUE hash)
{
kw_check_symbol(key);
rb_hash_aset(hash, key, value);
return ST_CONTINUE;
}
static VALUE
m_core_hash_merge_kwd(VALUE recv, VALUE hash, VALUE kw)
{
REWIND_CFP(hash = core_hash_merge_kwd(hash, kw));
return hash;
}
static VALUE
core_hash_merge_kwd(VALUE hash, VALUE kw)
{
rb_hash_foreach(rb_to_hash_type(kw), kwmerge_i, hash);
return hash;
}
/* Returns true if JIT is enabled */
static VALUE
mjit_enabled_p(void)
{
return mjit_enabled ? Qtrue : Qfalse;
}
static VALUE
mjit_pause_m(int argc, VALUE *argv, RB_UNUSED_VAR(VALUE self))
{
VALUE options = Qnil;
VALUE wait = Qtrue;
rb_scan_args(argc, argv, "0:", &options);
if (!NIL_P(options)) {
static ID keyword_ids[1];
if (!keyword_ids[0])
keyword_ids[0] = rb_intern("wait");
rb_get_kwargs(options, keyword_ids, 0, 1, &wait);
}
return mjit_pause(RTEST(wait));
}
extern VALUE *rb_gc_stack_start;
extern size_t rb_gc_stack_maxsize;
#ifdef __ia64
extern VALUE *rb_gc_register_stack_start;
#endif
/* debug functions */
/* :nodoc: */
static VALUE
sdr(void)
{
rb_vm_bugreport(NULL);
return Qnil;
}
/* :nodoc: */
static VALUE
nsdr(void)
{
VALUE ary = rb_ary_new();
#if HAVE_BACKTRACE
#include <execinfo.h>
#define MAX_NATIVE_TRACE 1024
static void *trace[MAX_NATIVE_TRACE];
int n = (int)backtrace(trace, MAX_NATIVE_TRACE);
char **syms = backtrace_symbols(trace, n);
int i;
if (syms == 0) {
rb_memerror();
}
for (i=0; i<n; i++) {
rb_ary_push(ary, rb_str_new2(syms[i]));
}
free(syms); /* OK */
#endif
return ary;
}
#if VM_COLLECT_USAGE_DETAILS
static VALUE usage_analysis_insn_stop(VALUE self);
static VALUE usage_analysis_operand_stop(VALUE self);
static VALUE usage_analysis_register_stop(VALUE self);
#endif
void
Init_VM(void)
{
VALUE opts;
VALUE klass;
VALUE fcore;
VALUE mjit;
/*
* Document-class: RubyVM
*
* The RubyVM module provides some access to Ruby internals.
* This module is for very limited purposes, such as debugging,
* prototyping, and research. Normal users must not use it.
*/
rb_cRubyVM = rb_define_class("RubyVM", rb_cObject);
rb_undef_alloc_func(rb_cRubyVM);
rb_undef_method(CLASS_OF(rb_cRubyVM), "new");
rb_define_singleton_method(rb_cRubyVM, "stat", vm_stat, -1);
/* FrozenCore (hidden) */
fcore = rb_class_new(rb_cBasicObject);
RBASIC(fcore)->flags = T_ICLASS;
klass = rb_singleton_class(fcore);
rb_define_method_id(klass, id_core_set_method_alias, m_core_set_method_alias, 3);
rb_define_method_id(klass, id_core_set_variable_alias, m_core_set_variable_alias, 2);
rb_define_method_id(klass, id_core_undef_method, m_core_undef_method, 2);
rb_define_method_id(klass, id_core_define_method, m_core_define_method, 2);
rb_define_method_id(klass, id_core_define_singleton_method, m_core_define_singleton_method, 3);
rb_define_method_id(klass, id_core_set_postexe, m_core_set_postexe, 0);
rb_define_method_id(klass, id_core_hash_merge_ptr, m_core_hash_merge_ptr, -1);
rb_define_method_id(klass, id_core_hash_merge_kwd, m_core_hash_merge_kwd, 2);
rb_define_method_id(klass, idProc, rb_block_proc, 0);
rb_define_method_id(klass, idLambda, rb_block_lambda, 0);
rb_obj_freeze(fcore);
RBASIC_CLEAR_CLASS(klass);
rb_obj_freeze(klass);
rb_gc_register_mark_object(fcore);
rb_mRubyVMFrozenCore = fcore;
/* RubyVM::MJIT */
mjit = rb_define_module_under(rb_cRubyVM, "MJIT");
rb_define_singleton_method(mjit, "enabled?", mjit_enabled_p, 0);
rb_define_singleton_method(mjit, "pause", mjit_pause_m, -1);
rb_define_singleton_method(mjit, "resume", mjit_resume, 0);
/*
* Document-class: Thread
*
* Threads are the Ruby implementation for a concurrent programming model.
*
* Programs that require multiple threads of execution are a perfect
* candidate for Ruby's Thread class.
*
* For example, we can create a new thread separate from the main thread's
* execution using ::new.
*
* thr = Thread.new { puts "Whats the big deal" }
*
* Then we are able to pause the execution of the main thread and allow
* our new thread to finish, using #join:
*
* thr.join #=> "Whats the big deal"
*
* If we don't call +thr.join+ before the main thread terminates, then all
* other threads including +thr+ will be killed.
*
* Alternatively, you can use an array for handling multiple threads at
* once, like in the following example:
*
* threads = []
* threads << Thread.new { puts "Whats the big deal" }
* threads << Thread.new { 3.times { puts "Threads are fun!" } }
*
* After creating a few threads we wait for them all to finish
* consecutively.
*
* threads.each { |thr| thr.join }
*
* === Thread initialization
*
* In order to create new threads, Ruby provides ::new, ::start, and
* ::fork. A block must be provided with each of these methods, otherwise
* a ThreadError will be raised.
*
* When subclassing the Thread class, the +initialize+ method of your
* subclass will be ignored by ::start and ::fork. Otherwise, be sure to
* call super in your +initialize+ method.
*
* === Thread termination
*
* For terminating threads, Ruby provides a variety of ways to do this.
*
* The class method ::kill, is meant to exit a given thread:
*
* thr = Thread.new { ... }
* Thread.kill(thr) # sends exit() to thr
*
* Alternatively, you can use the instance method #exit, or any of its
* aliases #kill or #terminate.
*
* thr.exit
*
* === Thread status
*
* Ruby provides a few instance methods for querying the state of a given
* thread. To get a string with the current thread's state use #status
*
* thr = Thread.new { sleep }
* thr.status # => "sleep"
* thr.exit
* thr.status # => false
*
* You can also use #alive? to tell if the thread is running or sleeping,
* and #stop? if the thread is dead or sleeping.
*
* === Thread variables and scope
*
* Since threads are created with blocks, the same rules apply to other
* Ruby blocks for variable scope. Any local variables created within this
* block are accessible to only this thread.
*
* ==== Fiber-local vs. Thread-local
*
* Each fiber has its own bucket for Thread#[] storage. When you set a
* new fiber-local it is only accessible within this Fiber. To illustrate:
*
* Thread.new {
* Thread.current[:foo] = "bar"
* Fiber.new {
* p Thread.current[:foo] # => nil
* }.resume
* }.join
*
* This example uses #[] for getting and #[]= for setting fiber-locals,
* you can also use #keys to list the fiber-locals for a given
* thread and #key? to check if a fiber-local exists.
*
* When it comes to thread-locals, they are accessible within the entire
* scope of the thread. Given the following example:
*
* Thread.new{
* Thread.current.thread_variable_set(:foo, 1)
* p Thread.current.thread_variable_get(:foo) # => 1
* Fiber.new{
* Thread.current.thread_variable_set(:foo, 2)
* p Thread.current.thread_variable_get(:foo) # => 2
* }.resume
* p Thread.current.thread_variable_get(:foo) # => 2
* }.join
*
* You can see that the thread-local +:foo+ carried over into the fiber
* and was changed to +2+ by the end of the thread.
*
* This example makes use of #thread_variable_set to create new
* thread-locals, and #thread_variable_get to reference them.
*
* There is also #thread_variables to list all thread-locals, and
* #thread_variable? to check if a given thread-local exists.
*
* === Exception handling
*
* Any thread can raise an exception using the #raise instance method,
* which operates similarly to Kernel#raise.
*
* However, it's important to note that an exception that occurs in any
* thread except the main thread depends on #abort_on_exception. This
* option is +false+ by default, meaning that any unhandled exception will
* cause the thread to terminate silently when waited on by either #join
* or #value. You can change this default by either #abort_on_exception=
* +true+ or setting $DEBUG to +true+.
*
* With the addition of the class method ::handle_interrupt, you can now
* handle exceptions asynchronously with threads.
*
* === Scheduling
*
* Ruby provides a few ways to support scheduling threads in your program.
*
* The first way is by using the class method ::stop, to put the current
* running thread to sleep and schedule the execution of another thread.
*
* Once a thread is asleep, you can use the instance method #wakeup to
* mark your thread as eligible for scheduling.
*
* You can also try ::pass, which attempts to pass execution to another
* thread but is dependent on the OS whether a running thread will switch
* or not. The same goes for #priority, which lets you hint to the thread
* scheduler which threads you want to take precedence when passing
* execution. This method is also dependent on the OS and may be ignored
* on some platforms.
*
*/
rb_cThread = rb_define_class("Thread", rb_cObject);
rb_undef_alloc_func(rb_cThread);
#if VM_COLLECT_USAGE_DETAILS
/* ::RubyVM::USAGE_ANALYSIS_* */
#define define_usage_analysis_hash(name) /* shut up rdoc -C */ \
rb_define_const(rb_cRubyVM, "USAGE_ANALYSIS_" #name, rb_hash_new())
define_usage_analysis_hash(INSN);
define_usage_analysis_hash(REGS);
define_usage_analysis_hash(INSN_BIGRAM);
rb_define_singleton_method(rb_cRubyVM, "USAGE_ANALYSIS_INSN_STOP", usage_analysis_insn_stop, 0);
rb_define_singleton_method(rb_cRubyVM, "USAGE_ANALYSIS_OPERAND_STOP", usage_analysis_operand_stop, 0);
rb_define_singleton_method(rb_cRubyVM, "USAGE_ANALYSIS_REGISTER_STOP", usage_analysis_register_stop, 0);
#endif
/* ::RubyVM::OPTS, which shows vm build options */
rb_define_const(rb_cRubyVM, "OPTS", opts = rb_ary_new());
#if OPT_DIRECT_THREADED_CODE
rb_ary_push(opts, rb_str_new2("direct threaded code"));
#elif OPT_TOKEN_THREADED_CODE
rb_ary_push(opts, rb_str_new2("token threaded code"));
#elif OPT_CALL_THREADED_CODE
rb_ary_push(opts, rb_str_new2("call threaded code"));
#endif
#if OPT_STACK_CACHING
rb_ary_push(opts, rb_str_new2("stack caching"));
#endif
#if OPT_OPERANDS_UNIFICATION
rb_ary_push(opts, rb_str_new2("operands unification"));
#endif
#if OPT_INSTRUCTIONS_UNIFICATION
rb_ary_push(opts, rb_str_new2("instructions unification"));
#endif
#if OPT_INLINE_METHOD_CACHE
rb_ary_push(opts, rb_str_new2("inline method cache"));
#endif
#if OPT_BLOCKINLINING
rb_ary_push(opts, rb_str_new2("block inlining"));
#endif
/* ::RubyVM::INSTRUCTION_NAMES */
rb_define_const(rb_cRubyVM, "INSTRUCTION_NAMES", rb_insns_name_array());
/* ::RubyVM::DEFAULT_PARAMS
* This constant variable shows VM's default parameters.
* Note that changing these values does not affect VM execution.
* Specification is not stable and you should not depend on this value.
* Of course, this constant is MRI specific.
*/
rb_define_const(rb_cRubyVM, "DEFAULT_PARAMS", vm_default_params());
/* debug functions ::RubyVM::SDR(), ::RubyVM::NSDR() */
#if VMDEBUG
rb_define_singleton_method(rb_cRubyVM, "SDR", sdr, 0);
rb_define_singleton_method(rb_cRubyVM, "NSDR", nsdr, 0);
#else
(void)sdr;
(void)nsdr;
#endif
/* VM bootstrap: phase 2 */
{
rb_vm_t *vm = ruby_current_vm_ptr;
rb_thread_t *th = GET_THREAD();
VALUE filename = rb_fstring_lit("<main>");
const rb_iseq_t *iseq = rb_iseq_new(0, filename, filename, Qnil, 0, ISEQ_TYPE_TOP);
volatile VALUE th_self;
/* create vm object */
vm->self = TypedData_Wrap_Struct(rb_cRubyVM, &vm_data_type, vm);
/* create main thread */
th_self = th->self = TypedData_Wrap_Struct(rb_cThread, &thread_data_type, th);
rb_iv_set(th_self, "locals", rb_hash_new());
vm->main_thread = th;
vm->running_thread = th;
th->vm = vm;
th->top_wrapper = 0;
th->top_self = rb_vm_top_self();
rb_thread_set_current(th);
rb_vm_living_threads_insert(vm, th);
rb_gc_register_mark_object((VALUE)iseq);
th->ec->cfp->iseq = iseq;
th->ec->cfp->pc = iseq->body->iseq_encoded;
th->ec->cfp->self = th->top_self;
VM_ENV_FLAGS_UNSET(th->ec->cfp->ep, VM_FRAME_FLAG_CFRAME);
VM_STACK_ENV_WRITE(th->ec->cfp->ep, VM_ENV_DATA_INDEX_ME_CREF, (VALUE)vm_cref_new(rb_cObject, METHOD_VISI_PRIVATE, FALSE, NULL, FALSE));
/*
* The Binding of the top level scope
*/
rb_define_global_const("TOPLEVEL_BINDING", rb_binding_new());
}
vm_init_redefined_flag();
rb_block_param_proxy = rb_obj_alloc(rb_cObject);
rb_add_method(rb_singleton_class(rb_block_param_proxy), idCall, VM_METHOD_TYPE_OPTIMIZED,
(void *)OPTIMIZED_METHOD_TYPE_BLOCK_CALL, METHOD_VISI_PUBLIC);
rb_obj_freeze(rb_block_param_proxy);
rb_gc_register_mark_object(rb_block_param_proxy);
/* vm_backtrace.c */
Init_vm_backtrace();
}
void
rb_vm_set_progname(VALUE filename)
{
rb_thread_t *th = GET_VM()->main_thread;
rb_control_frame_t *cfp = (void *)(th->ec->vm_stack + th->ec->vm_stack_size);
--cfp;
rb_iseq_pathobj_set(cfp->iseq, rb_str_dup(filename), rb_iseq_realpath(cfp->iseq));
}
extern const struct st_hash_type rb_fstring_hash_type;
void
Init_BareVM(void)
{
/* VM bootstrap: phase 1 */
rb_vm_t * vm = ruby_mimmalloc(sizeof(*vm));
rb_thread_t * th = ruby_mimmalloc(sizeof(*th));
if (!vm || !th) {
fprintf(stderr, "[FATAL] failed to allocate memory\n");
exit(EXIT_FAILURE);
}
MEMZERO(th, rb_thread_t, 1);
vm_init2(vm);
vm->objspace = rb_objspace_alloc();
ruby_current_vm_ptr = vm;
Init_native_thread(th);
th->vm = vm;
th_init(th, 0);
rb_thread_set_current_raw(th);
ruby_thread_init_stack(th);
}
void
Init_vm_objects(void)
{
rb_vm_t *vm = GET_VM();
vm->defined_module_hash = rb_hash_new();
/* initialize mark object array, hash */
vm->mark_object_ary = rb_ary_tmp_new(128);
vm->loading_table = st_init_strtable();
vm->frozen_strings = st_init_table_with_size(&rb_fstring_hash_type, 1000);
}
/* top self */
static VALUE
main_to_s(VALUE obj)
{
return rb_str_new2("main");
}
VALUE
rb_vm_top_self(void)
{
return GET_VM()->top_self;
}
void
Init_top_self(void)
{
rb_vm_t *vm = GET_VM();
vm->top_self = rb_obj_alloc(rb_cObject);
rb_define_singleton_method(rb_vm_top_self(), "to_s", main_to_s, 0);
rb_define_alias(rb_singleton_class(rb_vm_top_self()), "inspect", "to_s");
}
static VALUE *
ruby_vm_verbose_ptr(rb_vm_t *vm)
{
return &vm->verbose;
}
static VALUE *
ruby_vm_debug_ptr(rb_vm_t *vm)
{
return &vm->debug;
}
VALUE *
rb_ruby_verbose_ptr(void)
{
return ruby_vm_verbose_ptr(GET_VM());
}
VALUE *
rb_ruby_debug_ptr(void)
{
return ruby_vm_debug_ptr(GET_VM());
}
/* iseq.c */
VALUE rb_insn_operand_intern(const rb_iseq_t *iseq,
VALUE insn, int op_no, VALUE op,
int len, size_t pos, VALUE *pnop, VALUE child);
st_table *
rb_vm_fstring_table(void)
{
return GET_VM()->frozen_strings;
}
#if VM_COLLECT_USAGE_DETAILS
#define HASH_ASET(h, k, v) rb_hash_aset((h), (st_data_t)(k), (st_data_t)(v))
/* uh = {
* insn(Fixnum) => ihash(Hash)
* }
* ihash = {
* -1(Fixnum) => count, # insn usage
* 0(Fixnum) => ophash, # operand usage
* }
* ophash = {
* val(interned string) => count(Fixnum)
* }
*/
static void
vm_analysis_insn(int insn)
{
ID usage_hash;
ID bigram_hash;
static int prev_insn = -1;
VALUE uh;
VALUE ihash;
VALUE cv;
CONST_ID(usage_hash, "USAGE_ANALYSIS_INSN");
CONST_ID(bigram_hash, "USAGE_ANALYSIS_INSN_BIGRAM");
uh = rb_const_get(rb_cRubyVM, usage_hash);
if ((ihash = rb_hash_aref(uh, INT2FIX(insn))) == Qnil) {
ihash = rb_hash_new();
HASH_ASET(uh, INT2FIX(insn), ihash);
}
if ((cv = rb_hash_aref(ihash, INT2FIX(-1))) == Qnil) {
cv = INT2FIX(0);
}
HASH_ASET(ihash, INT2FIX(-1), INT2FIX(FIX2INT(cv) + 1));
/* calc bigram */
if (prev_insn != -1) {
VALUE bi;
VALUE ary[2];
VALUE cv;
ary[0] = INT2FIX(prev_insn);
ary[1] = INT2FIX(insn);
bi = rb_ary_new4(2, &ary[0]);
uh = rb_const_get(rb_cRubyVM, bigram_hash);
if ((cv = rb_hash_aref(uh, bi)) == Qnil) {
cv = INT2FIX(0);
}
HASH_ASET(uh, bi, INT2FIX(FIX2INT(cv) + 1));
}
prev_insn = insn;
}
static void
vm_analysis_operand(int insn, int n, VALUE op)
{
ID usage_hash;
VALUE uh;
VALUE ihash;
VALUE ophash;
VALUE valstr;
VALUE cv;
CONST_ID(usage_hash, "USAGE_ANALYSIS_INSN");
uh = rb_const_get(rb_cRubyVM, usage_hash);
if ((ihash = rb_hash_aref(uh, INT2FIX(insn))) == Qnil) {
ihash = rb_hash_new();
HASH_ASET(uh, INT2FIX(insn), ihash);
}
if ((ophash = rb_hash_aref(ihash, INT2FIX(n))) == Qnil) {
ophash = rb_hash_new();
HASH_ASET(ihash, INT2FIX(n), ophash);
}
/* intern */
valstr = rb_insn_operand_intern(GET_EC()->cfp->iseq, insn, n, op, 0, 0, 0, 0);
/* set count */
if ((cv = rb_hash_aref(ophash, valstr)) == Qnil) {
cv = INT2FIX(0);
}
HASH_ASET(ophash, valstr, INT2FIX(FIX2INT(cv) + 1));
}
static void
vm_analysis_register(int reg, int isset)
{
ID usage_hash;
VALUE uh;
VALUE valstr;
static const char regstrs[][5] = {
"pc", /* 0 */
"sp", /* 1 */
"ep", /* 2 */
"cfp", /* 3 */
"self", /* 4 */
"iseq", /* 5 */
};
static const char getsetstr[][4] = {
"get",
"set",
};
static VALUE syms[sizeof(regstrs) / sizeof(regstrs[0])][2];
VALUE cv;
CONST_ID(usage_hash, "USAGE_ANALYSIS_REGS");
if (syms[0] == 0) {
char buff[0x10];
int i;
for (i = 0; i < (int)(sizeof(regstrs) / sizeof(regstrs[0])); i++) {
int j;
for (j = 0; j < 2; j++) {
snprintf(buff, 0x10, "%d %s %-4s", i, getsetstr[j], regstrs[i]);
syms[i][j] = ID2SYM(rb_intern(buff));
}
}
}
valstr = syms[reg][isset];
uh = rb_const_get(rb_cRubyVM, usage_hash);
if ((cv = rb_hash_aref(uh, valstr)) == Qnil) {
cv = INT2FIX(0);
}
HASH_ASET(uh, valstr, INT2FIX(FIX2INT(cv) + 1));
}
#undef HASH_ASET
static void (*ruby_vm_collect_usage_func_insn)(int insn) = vm_analysis_insn;
static void (*ruby_vm_collect_usage_func_operand)(int insn, int n, VALUE op) = vm_analysis_operand;
static void (*ruby_vm_collect_usage_func_register)(int reg, int isset) = vm_analysis_register;
/* :nodoc: */
static VALUE
usage_analysis_insn_stop(VALUE self)
{
ruby_vm_collect_usage_func_insn = 0;
return Qnil;
}
/* :nodoc: */
static VALUE
usage_analysis_operand_stop(VALUE self)
{
ruby_vm_collect_usage_func_operand = 0;
return Qnil;
}
/* :nodoc: */
static VALUE
usage_analysis_register_stop(VALUE self)
{
ruby_vm_collect_usage_func_register = 0;
return Qnil;
}
#else
MAYBE_UNUSED(static void (*ruby_vm_collect_usage_func_insn)(int insn)) = NULL;
MAYBE_UNUSED(static void (*ruby_vm_collect_usage_func_operand)(int insn, int n, VALUE op)) = NULL;
MAYBE_UNUSED(static void (*ruby_vm_collect_usage_func_register)(int reg, int isset)) = NULL;
#endif
#if VM_COLLECT_USAGE_DETAILS
/* @param insn instruction number */
static void
vm_collect_usage_insn(int insn)
{
if (RUBY_DTRACE_INSN_ENABLED()) {
RUBY_DTRACE_INSN(rb_insns_name(insn));
}
if (ruby_vm_collect_usage_func_insn)
(*ruby_vm_collect_usage_func_insn)(insn);
}
/* @param insn instruction number
* @param n n-th operand
* @param op operand value
*/
static void
vm_collect_usage_operand(int insn, int n, VALUE op)
{
if (RUBY_DTRACE_INSN_OPERAND_ENABLED()) {
VALUE valstr;
valstr = rb_insn_operand_intern(GET_EC()->cfp->iseq, insn, n, op, 0, 0, 0, 0);
RUBY_DTRACE_INSN_OPERAND(RSTRING_PTR(valstr), rb_insns_name(insn));
RB_GC_GUARD(valstr);
}
if (ruby_vm_collect_usage_func_operand)
(*ruby_vm_collect_usage_func_operand)(insn, n, op);
}
/* @param reg register id. see code of vm_analysis_register() */
/* @param isset 0: read, 1: write */
static void
vm_collect_usage_register(int reg, int isset)
{
if (ruby_vm_collect_usage_func_register)
(*ruby_vm_collect_usage_func_register)(reg, isset);
}
#endif
#endif /* #ifndef MJIT_HEADER */
#include "vm_call_iseq_optimized.inc" /* required from vm_insnhelper.c */
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