diff options
Diffstat (limited to 'ractor.c')
| -rw-r--r-- | ractor.c | 2621 |
1 files changed, 2621 insertions, 0 deletions
diff --git a/ractor.c b/ractor.c new file mode 100644 index 0000000000..2dcbbd10a0 --- /dev/null +++ b/ractor.c @@ -0,0 +1,2621 @@ +// Ractor implementation + +#include "ruby/ruby.h" +#include "ruby/thread.h" +#include "ruby/ractor.h" +#include "ruby/re.h" +#include "ruby/thread_native.h" +#include "vm_core.h" +#include "vm_sync.h" +#include "ractor_core.h" +#include "internal/complex.h" +#include "internal/error.h" +#include "internal/gc.h" +#include "internal/hash.h" +#include "internal/object.h" +#include "internal/ractor.h" +#include "internal/rational.h" +#include "internal/struct.h" +#include "internal/thread.h" +#include "variable.h" +#include "yjit.h" +#include "zjit.h" + +VALUE rb_cRactor; +static VALUE rb_cRactorSelector; + +VALUE rb_eRactorUnsafeError; +VALUE rb_eRactorIsolationError; +static VALUE rb_eRactorError; +static VALUE rb_eRactorRemoteError; +static VALUE rb_eRactorMovedError; +static VALUE rb_eRactorClosedError; +static VALUE rb_cRactorMovedObject; + +static void vm_ractor_blocking_cnt_inc(rb_vm_t *vm, rb_ractor_t *r, const char *file, int line); + + +#if RACTOR_CHECK_MODE > 0 +bool rb_ractor_ignore_belonging_flag = false; +#endif + +// Ractor locking + +static void +ASSERT_ractor_unlocking(rb_ractor_t *r) +{ +#if RACTOR_CHECK_MODE > 0 + const rb_execution_context_t *ec = rb_current_ec_noinline(); + if (ec != NULL && r->sync.locked_by == rb_ractor_self(rb_ec_ractor_ptr(ec))) { + rb_bug("recursive ractor locking"); + } +#endif +} + +static void +ASSERT_ractor_locking(rb_ractor_t *r) +{ +#if RACTOR_CHECK_MODE > 0 + const rb_execution_context_t *ec = rb_current_ec_noinline(); + if (ec != NULL && r->sync.locked_by != rb_ractor_self(rb_ec_ractor_ptr(ec))) { + rp(r->sync.locked_by); + rb_bug("ractor lock is not acquired."); + } +#endif +} + +static void +ractor_lock(rb_ractor_t *r, const char *file, int line) +{ + RUBY_DEBUG_LOG2(file, line, "locking r:%u%s", r->pub.id, rb_current_ractor_raw(false) == r ? " (self)" : ""); + + ASSERT_ractor_unlocking(r); + rb_native_mutex_lock(&r->sync.lock); + + const rb_execution_context_t *ec = rb_current_ec_noinline(); + if (ec) { + rb_ractor_t *cr = rb_ec_ractor_ptr(ec); + VM_ASSERT(!cr->malloc_gc_disabled); + cr->malloc_gc_disabled = true; + } + +#if RACTOR_CHECK_MODE > 0 + if (ec != NULL) { + rb_ractor_t *cr = rb_ec_ractor_ptr(ec); + r->sync.locked_by = rb_ractor_self(cr); + } +#endif + + RUBY_DEBUG_LOG2(file, line, "locked r:%u%s", r->pub.id, rb_current_ractor_raw(false) == r ? " (self)" : ""); +} + +static void +ractor_lock_self(rb_ractor_t *cr, const char *file, int line) +{ + VM_ASSERT(cr == rb_ec_ractor_ptr(rb_current_ec_noinline())); +#if RACTOR_CHECK_MODE > 0 + VM_ASSERT(cr->sync.locked_by != cr->pub.self); +#endif + ractor_lock(cr, file, line); +} + +static void +ractor_unlock(rb_ractor_t *r, const char *file, int line) +{ + ASSERT_ractor_locking(r); +#if RACTOR_CHECK_MODE > 0 + r->sync.locked_by = Qnil; +#endif + + const rb_execution_context_t *ec = rb_current_ec_noinline(); + if (ec) { + rb_ractor_t *cr = rb_ec_ractor_ptr(ec); + VM_ASSERT(cr->malloc_gc_disabled); + cr->malloc_gc_disabled = false; + } + + rb_native_mutex_unlock(&r->sync.lock); + + RUBY_DEBUG_LOG2(file, line, "r:%u%s", r->pub.id, rb_current_ractor_raw(false) == r ? " (self)" : ""); +} + +static void +ractor_unlock_self(rb_ractor_t *cr, const char *file, int line) +{ + VM_ASSERT(cr == rb_ec_ractor_ptr(rb_current_ec_noinline())); +#if RACTOR_CHECK_MODE > 0 + VM_ASSERT(cr->sync.locked_by == cr->pub.self); +#endif + ractor_unlock(cr, file, line); +} + +#define RACTOR_LOCK(r) ractor_lock(r, __FILE__, __LINE__) +#define RACTOR_UNLOCK(r) ractor_unlock(r, __FILE__, __LINE__) +#define RACTOR_LOCK_SELF(r) ractor_lock_self(r, __FILE__, __LINE__) +#define RACTOR_UNLOCK_SELF(r) ractor_unlock_self(r, __FILE__, __LINE__) + +void +rb_ractor_lock_self(rb_ractor_t *r) +{ + RACTOR_LOCK_SELF(r); +} + +void +rb_ractor_unlock_self(rb_ractor_t *r) +{ + RACTOR_UNLOCK_SELF(r); +} + +// Ractor status + +static const char * +ractor_status_str(enum ractor_status status) +{ + switch (status) { + case ractor_created: return "created"; + case ractor_running: return "running"; + case ractor_blocking: return "blocking"; + case ractor_terminated: return "terminated"; + } + rb_bug("unreachable"); +} + +static void +ractor_status_set(rb_ractor_t *r, enum ractor_status status) +{ + RUBY_DEBUG_LOG("r:%u [%s]->[%s]", r->pub.id, ractor_status_str(r->status_), ractor_status_str(status)); + + // check 1 + if (r->status_ != ractor_created) { + VM_ASSERT(r == GET_RACTOR()); // only self-modification is allowed. + ASSERT_vm_locking(); + } + + // check2: transition check. assume it will be vanished on non-debug build. + switch (r->status_) { + case ractor_created: + VM_ASSERT(status == ractor_blocking); + break; + case ractor_running: + VM_ASSERT(status == ractor_blocking|| + status == ractor_terminated); + break; + case ractor_blocking: + VM_ASSERT(status == ractor_running); + break; + case ractor_terminated: + rb_bug("unreachable"); + break; + } + + r->status_ = status; +} + +static bool +ractor_status_p(rb_ractor_t *r, enum ractor_status status) +{ + return rb_ractor_status_p(r, status); +} + +// Ractor data/mark/free + +static void ractor_local_storage_mark(rb_ractor_t *r); +static void ractor_local_storage_free(rb_ractor_t *r); + +static void ractor_sync_mark(rb_ractor_t *r); +static void ractor_sync_free(rb_ractor_t *r); +static size_t ractor_sync_memsize(const rb_ractor_t *r); +static void ractor_sync_init(rb_ractor_t *r); + +static int +mark_targeted_hook_list(st_data_t key, st_data_t value, st_data_t _arg) +{ + rb_hook_list_t *hook_list = (rb_hook_list_t*)value; + + if (hook_list->type == hook_list_type_targeted_iseq) { + rb_gc_mark((VALUE)key); + } + else { + rb_method_definition_t *def = (rb_method_definition_t*)key; + RUBY_ASSERT(hook_list->type == hook_list_type_targeted_def); + rb_gc_mark(def->body.bmethod.proc); + } + rb_hook_list_mark(hook_list); + + return ST_CONTINUE; +} + +static void +ractor_mark(void *ptr) +{ + rb_ractor_t *r = (rb_ractor_t *)ptr; + bool checking_shareable = rb_gc_checking_shareable(); + + rb_gc_mark(r->loc); + rb_gc_mark(r->name); + + if (!checking_shareable) { + // may unshareable objects + rb_gc_mark(r->r_stdin); + rb_gc_mark(r->r_stdout); + rb_gc_mark(r->r_stderr); + rb_gc_mark(r->verbose); + rb_gc_mark(r->debug); + + // mark received messages + ractor_sync_mark(r); + + rb_hook_list_mark(&r->pub.hooks); + if (r->pub.targeted_hooks) { + st_foreach(r->pub.targeted_hooks, mark_targeted_hook_list, 0); + } + + if (r->threads.cnt > 0) { + rb_thread_t *th = 0; + ccan_list_for_each(&r->threads.set, th, lt_node) { + VM_ASSERT(th != NULL); + rb_gc_mark(th->self); + } + } + + ractor_local_storage_mark(r); + } +} + +static int +free_targeted_hook_lists(st_data_t key, st_data_t val, st_data_t _arg) +{ + rb_hook_list_t *hook_list = (rb_hook_list_t*)val; + rb_hook_list_free(hook_list); + return ST_DELETE; +} + +static void +free_targeted_hooks(st_table *hooks_tbl) +{ + st_foreach(hooks_tbl, free_targeted_hook_lists, 0); +} + +static void +ractor_free(void *ptr) +{ + rb_ractor_t *r = (rb_ractor_t *)ptr; + RUBY_DEBUG_LOG("free r:%d", rb_ractor_id(r)); + free_targeted_hooks(r->pub.targeted_hooks); + rb_native_mutex_destroy(&r->sync.lock); +#ifdef RUBY_THREAD_WIN32_H + rb_native_cond_destroy(&r->sync.wakeup_cond); +#endif + ractor_local_storage_free(r); + rb_hook_list_free(&r->pub.hooks); + st_free_table(r->pub.targeted_hooks); + + if (r->newobj_cache) { + RUBY_ASSERT(r == ruby_single_main_ractor); + + rb_gc_ractor_cache_free(r->newobj_cache); + r->newobj_cache = NULL; + } + + ractor_sync_free(r); + ruby_xfree(r); +} + +static size_t +ractor_memsize(const void *ptr) +{ + rb_ractor_t *r = (rb_ractor_t *)ptr; + + // TODO: more correct? + return sizeof(rb_ractor_t) + ractor_sync_memsize(r); +} + +static const rb_data_type_t ractor_data_type = { + "ractor", + { + ractor_mark, + ractor_free, + ractor_memsize, + NULL, // update + }, + 0, 0, RUBY_TYPED_FREE_IMMEDIATELY /* | RUBY_TYPED_WB_PROTECTED */ +}; + +bool +rb_ractor_p(VALUE gv) +{ + if (rb_typeddata_is_kind_of(gv, &ractor_data_type)) { + return true; + } + else { + return false; + } +} + +static inline rb_ractor_t * +RACTOR_PTR(VALUE self) +{ + VM_ASSERT(rb_ractor_p(self)); + rb_ractor_t *r = DATA_PTR(self); + return r; +} + +static rb_atomic_t ractor_last_id; + +#if RACTOR_CHECK_MODE > 0 +uint32_t +rb_ractor_current_id(void) +{ + if (GET_THREAD()->ractor == NULL) { + return 1; // main ractor + } + else { + return rb_ractor_id(GET_RACTOR()); + } +} +#endif + +#include "ractor_sync.c" + +// creation/termination + +static uint32_t +ractor_next_id(void) +{ + uint32_t id; + + id = (uint32_t)(RUBY_ATOMIC_FETCH_ADD(ractor_last_id, 1) + 1); + + return id; +} + +static void +vm_insert_ractor0(rb_vm_t *vm, rb_ractor_t *r, bool single_ractor_mode) +{ + RUBY_DEBUG_LOG("r:%u ractor.cnt:%u++", r->pub.id, vm->ractor.cnt); + VM_ASSERT(single_ractor_mode || RB_VM_LOCKED_P()); + + ccan_list_add_tail(&vm->ractor.set, &r->vmlr_node); + vm->ractor.cnt++; + + if (r->newobj_cache) { + VM_ASSERT(r == ruby_single_main_ractor); + } + else { + r->newobj_cache = rb_gc_ractor_cache_alloc(r); + } +} + +static void +cancel_single_ractor_mode(void) +{ + // enable multi-ractor mode + RUBY_DEBUG_LOG("enable multi-ractor mode"); + + ruby_single_main_ractor = NULL; + rb_funcall(rb_cRactor, rb_intern("_activated"), 0); +} + +static void +vm_insert_ractor(rb_vm_t *vm, rb_ractor_t *r) +{ + VM_ASSERT(ractor_status_p(r, ractor_created)); + + if (rb_multi_ractor_p()) { + RB_VM_LOCK(); + { + vm_insert_ractor0(vm, r, false); + vm_ractor_blocking_cnt_inc(vm, r, __FILE__, __LINE__); + } + RB_VM_UNLOCK(); + } + else { + if (vm->ractor.cnt == 0) { + // main ractor + vm_insert_ractor0(vm, r, true); + ractor_status_set(r, ractor_blocking); + ractor_status_set(r, ractor_running); + } + else { + cancel_single_ractor_mode(); + vm_insert_ractor0(vm, r, true); + vm_ractor_blocking_cnt_inc(vm, r, __FILE__, __LINE__); + } + } +} + +static void +vm_remove_ractor(rb_vm_t *vm, rb_ractor_t *cr) +{ + VM_ASSERT(ractor_status_p(cr, ractor_running)); + VM_ASSERT(vm->ractor.cnt > 1); + VM_ASSERT(cr->threads.cnt == 1); + + RB_VM_LOCK(); + { + RUBY_DEBUG_LOG("ractor.cnt:%u-- terminate_waiting:%d", + vm->ractor.cnt, vm->ractor.sync.terminate_waiting); + + VM_ASSERT(vm->ractor.cnt > 0); + ccan_list_del(&cr->vmlr_node); + + if (vm->ractor.cnt <= 2 && vm->ractor.sync.terminate_waiting) { + rb_native_cond_signal(&vm->ractor.sync.terminate_cond); + } + vm->ractor.cnt--; + + rb_gc_ractor_cache_free(cr->newobj_cache); + cr->newobj_cache = NULL; + + ractor_status_set(cr, ractor_terminated); + } + RB_VM_UNLOCK(); +} + +static VALUE +ractor_alloc(VALUE klass) +{ + rb_ractor_t *r; + VALUE rv = TypedData_Make_Struct(klass, rb_ractor_t, &ractor_data_type, r); + FL_SET_RAW(rv, RUBY_FL_SHAREABLE); + r->pub.self = rv; + r->next_ec_serial = 1; + VM_ASSERT(ractor_status_p(r, ractor_created)); + return rv; +} + +rb_ractor_t * +rb_ractor_main_alloc(void) +{ + rb_ractor_t *r = ruby_mimcalloc(1, sizeof(rb_ractor_t)); + if (r == NULL) { + fprintf(stderr, "[FATAL] failed to allocate memory for main ractor\n"); + exit(EXIT_FAILURE); + } + r->pub.id = ++ractor_last_id; + r->loc = Qnil; + r->name = Qnil; + r->pub.self = Qnil; + r->newobj_cache = rb_gc_ractor_cache_alloc(r); + r->next_ec_serial = 1; + ruby_single_main_ractor = r; + + return r; +} + +#if defined(HAVE_WORKING_FORK) +// Set up the main Ractor for the VM after fork. +// Puts us in "single Ractor mode" +void +rb_ractor_atfork(rb_vm_t *vm, rb_thread_t *th) +{ + // initialize as a main ractor + vm->ractor.cnt = 0; + vm->ractor.blocking_cnt = 0; + ruby_single_main_ractor = th->ractor; + th->ractor->status_ = ractor_created; + + rb_ractor_living_threads_init(th->ractor); + rb_ractor_living_threads_insert(th->ractor, th); + + VM_ASSERT(vm->ractor.blocking_cnt == 0); + VM_ASSERT(vm->ractor.cnt == 1); +} + +void +rb_ractor_terminate_atfork(rb_vm_t *vm, rb_ractor_t *r) +{ + rb_gc_ractor_cache_free(r->newobj_cache); + r->newobj_cache = NULL; + r->status_ = ractor_terminated; + ractor_sync_terminate_atfork(vm, r); +} +#endif + +void rb_thread_sched_init(struct rb_thread_sched *, bool atfork); + +void +rb_ractor_living_threads_init(rb_ractor_t *r) +{ + ccan_list_head_init(&r->threads.set); + r->threads.cnt = 0; + r->threads.blocking_cnt = 0; +} + +static void +ractor_init(rb_ractor_t *r, VALUE name, VALUE loc) +{ + ractor_sync_init(r); + r->pub.targeted_hooks = st_init_numtable(); + r->pub.hooks.type = hook_list_type_ractor_local; + + // thread management + rb_thread_sched_init(&r->threads.sched, false); + rb_ractor_living_threads_init(r); + + // naming + if (!NIL_P(name)) { + rb_encoding *enc; + StringValueCStr(name); + enc = rb_enc_get(name); + if (!rb_enc_asciicompat(enc)) { + rb_raise(rb_eArgError, "ASCII incompatible encoding (%s)", + rb_enc_name(enc)); + } + name = RB_OBJ_SET_SHAREABLE(rb_str_new_frozen(name)); + } + + if (!SPECIAL_CONST_P(loc)) RB_OBJ_SET_SHAREABLE(loc); + r->loc = loc; + r->name = name; +} + +void +rb_ractor_main_setup(rb_vm_t *vm, rb_ractor_t *r, rb_thread_t *th) +{ + VALUE rv = r->pub.self = TypedData_Wrap_Struct(rb_cRactor, &ractor_data_type, r); + FL_SET_RAW(r->pub.self, RUBY_FL_SHAREABLE); + ractor_init(r, Qnil, Qnil); + r->threads.main = th; + rb_ractor_living_threads_insert(r, th); + + RB_GC_GUARD(rv); +} + +static VALUE +ractor_create(rb_execution_context_t *ec, VALUE self, VALUE loc, VALUE name, VALUE args, VALUE block) +{ + VALUE rv = ractor_alloc(self); + rb_ractor_t *r = RACTOR_PTR(rv); + ractor_init(r, name, loc); + + r->pub.id = ractor_next_id(); + RUBY_DEBUG_LOG("r:%u", r->pub.id); + + rb_ractor_t *cr = rb_ec_ractor_ptr(ec); + r->verbose = cr->verbose; + r->debug = cr->debug; + + rb_yjit_before_ractor_spawn(); + rb_zjit_before_ractor_spawn(); + rb_thread_create_ractor(r, args, block); + + RB_GC_GUARD(rv); + return rv; +} + +#if 0 +static VALUE +ractor_create_func(VALUE klass, VALUE loc, VALUE name, VALUE args, rb_block_call_func_t func) +{ + VALUE block = rb_proc_new(func, Qnil); + return ractor_create(rb_current_ec_noinline(), klass, loc, name, args, block); +} +#endif + +static void +ractor_atexit(rb_execution_context_t *ec, rb_ractor_t *cr, VALUE result, bool exc) +{ + ractor_notify_exit(ec, cr, result, exc); +} + +void +rb_ractor_atexit(rb_execution_context_t *ec, VALUE result) +{ + rb_ractor_t *cr = rb_ec_ractor_ptr(ec); + ractor_atexit(ec, cr, result, false); +} + +void +rb_ractor_atexit_exception(rb_execution_context_t *ec) +{ + rb_ractor_t *cr = rb_ec_ractor_ptr(ec); + ractor_atexit(ec, cr, ec->errinfo, true); +} + +void +rb_ractor_teardown(rb_execution_context_t *ec) +{ + rb_ractor_t *cr = rb_ec_ractor_ptr(ec); + + // sync with rb_ractor_terminate_interrupt_main_thread() + RB_VM_LOCKING() { + VM_ASSERT(cr->threads.main != NULL); + cr->threads.main = NULL; + } +} + +void +rb_ractor_receive_parameters(rb_execution_context_t *ec, rb_ractor_t *r, int len, VALUE *ptr) +{ + for (int i=0; i<len; i++) { + ptr[i] = ractor_receive(ec, ractor_default_port(r)); + } +} + +void +rb_ractor_send_parameters(rb_execution_context_t *ec, rb_ractor_t *r, VALUE args) +{ + int len = RARRAY_LENINT(args); + for (int i=0; i<len; i++) { + ractor_send(ec, ractor_default_port(r), RARRAY_AREF(args, i), false); + } +} + +bool +rb_ractor_main_p_(void) +{ + VM_ASSERT(rb_multi_ractor_p()); + rb_execution_context_t *ec = GET_EC(); + return rb_ec_ractor_ptr(ec) == rb_ec_vm_ptr(ec)->ractor.main_ractor; +} + +int +rb_ractor_living_thread_num(const rb_ractor_t *r) +{ + return r->threads.cnt; +} + +// only for current ractor +VALUE +rb_ractor_thread_list(void) +{ + rb_ractor_t *r = GET_RACTOR(); + rb_thread_t *th = 0; + VALUE ary = rb_ary_new(); + + ccan_list_for_each(&r->threads.set, th, lt_node) { + switch (th->status) { + case THREAD_RUNNABLE: + case THREAD_STOPPED: + case THREAD_STOPPED_FOREVER: + rb_ary_push(ary, th->self); + default: + break; + } + } + + return ary; +} + +void +rb_ractor_living_threads_insert(rb_ractor_t *r, rb_thread_t *th) +{ + VM_ASSERT(th != NULL); + + RACTOR_LOCK(r); + { + RUBY_DEBUG_LOG("r(%d)->threads.cnt:%d++", r->pub.id, r->threads.cnt); + ccan_list_add_tail(&r->threads.set, &th->lt_node); + r->threads.cnt++; + } + RACTOR_UNLOCK(r); + + // first thread for a ractor + if (r->threads.cnt == 1) { + VM_ASSERT(ractor_status_p(r, ractor_created)); + vm_insert_ractor(th->vm, r); + } +} + +static void +vm_ractor_blocking_cnt_inc(rb_vm_t *vm, rb_ractor_t *r, const char *file, int line) +{ + ractor_status_set(r, ractor_blocking); + + RUBY_DEBUG_LOG2(file, line, "vm->ractor.blocking_cnt:%d++", vm->ractor.blocking_cnt); + vm->ractor.blocking_cnt++; + VM_ASSERT(vm->ractor.blocking_cnt <= vm->ractor.cnt); +} + +void +rb_vm_ractor_blocking_cnt_inc(rb_vm_t *vm, rb_ractor_t *cr, const char *file, int line) +{ + ASSERT_vm_locking(); + VM_ASSERT(GET_RACTOR() == cr); + vm_ractor_blocking_cnt_inc(vm, cr, file, line); +} + +void +rb_vm_ractor_blocking_cnt_dec(rb_vm_t *vm, rb_ractor_t *cr, const char *file, int line) +{ + ASSERT_vm_locking(); + VM_ASSERT(GET_RACTOR() == cr); + + RUBY_DEBUG_LOG2(file, line, "vm->ractor.blocking_cnt:%d--", vm->ractor.blocking_cnt); + VM_ASSERT(vm->ractor.blocking_cnt > 0); + vm->ractor.blocking_cnt--; + + ractor_status_set(cr, ractor_running); +} + +static void +ractor_check_blocking(rb_ractor_t *cr, unsigned int remained_thread_cnt, const char *file, int line) +{ + VM_ASSERT(cr == GET_RACTOR()); + + RUBY_DEBUG_LOG2(file, line, + "cr->threads.cnt:%u cr->threads.blocking_cnt:%u vm->ractor.cnt:%u vm->ractor.blocking_cnt:%u", + cr->threads.cnt, cr->threads.blocking_cnt, + GET_VM()->ractor.cnt, GET_VM()->ractor.blocking_cnt); + + VM_ASSERT(cr->threads.cnt >= cr->threads.blocking_cnt + 1); + + if (remained_thread_cnt > 0 && + // will be block + cr->threads.cnt == cr->threads.blocking_cnt + 1) { + // change ractor status: running -> blocking + rb_vm_t *vm = GET_VM(); + + RB_VM_LOCKING() { + rb_vm_ractor_blocking_cnt_inc(vm, cr, file, line); + } + } +} + +void rb_threadptr_remove(rb_thread_t *th); + +void +rb_ractor_living_threads_remove(rb_ractor_t *cr, rb_thread_t *th) +{ + VM_ASSERT(cr == GET_RACTOR()); + RUBY_DEBUG_LOG("r->threads.cnt:%d--", cr->threads.cnt); + ractor_check_blocking(cr, cr->threads.cnt - 1, __FILE__, __LINE__); + + rb_threadptr_remove(th); + + if (cr->threads.cnt == 1) { + vm_remove_ractor(th->vm, cr); + } + else { + RACTOR_LOCK(cr); + { + ccan_list_del(&th->lt_node); + cr->threads.cnt--; + } + RACTOR_UNLOCK(cr); + } +} + +void +rb_ractor_blocking_threads_inc(rb_ractor_t *cr, const char *file, int line) +{ + RUBY_DEBUG_LOG2(file, line, "cr->threads.blocking_cnt:%d++", cr->threads.blocking_cnt); + + VM_ASSERT(cr->threads.cnt > 0); + VM_ASSERT(cr == GET_RACTOR()); + + ractor_check_blocking(cr, cr->threads.cnt, __FILE__, __LINE__); + cr->threads.blocking_cnt++; +} + +void +rb_ractor_blocking_threads_dec(rb_ractor_t *cr, const char *file, int line) +{ + RUBY_DEBUG_LOG2(file, line, + "r->threads.blocking_cnt:%d--, r->threads.cnt:%u", + cr->threads.blocking_cnt, cr->threads.cnt); + + VM_ASSERT(cr == GET_RACTOR()); + + if (cr->threads.cnt == cr->threads.blocking_cnt) { + rb_vm_t *vm = GET_VM(); + + RB_VM_LOCKING() { + rb_vm_ractor_blocking_cnt_dec(vm, cr, __FILE__, __LINE__); + } + } + + cr->threads.blocking_cnt--; +} + +void +rb_ractor_vm_barrier_interrupt_running_thread(rb_ractor_t *r) +{ + VM_ASSERT(r != GET_RACTOR()); + ASSERT_ractor_unlocking(r); + ASSERT_vm_locking(); + + RACTOR_LOCK(r); + { + if (ractor_status_p(r, ractor_running)) { + rb_execution_context_t *ec = r->threads.running_ec; + if (ec) { + RUBY_VM_SET_VM_BARRIER_INTERRUPT(ec); + } + } + } + RACTOR_UNLOCK(r); +} + +void +rb_ractor_terminate_interrupt_main_thread(rb_ractor_t *r) +{ + VM_ASSERT(r != GET_RACTOR()); + ASSERT_ractor_unlocking(r); + ASSERT_vm_locking(); + + rb_thread_t *main_th = r->threads.main; + if (main_th) { + if (main_th->status != THREAD_KILLED) { + RUBY_VM_SET_TERMINATE_INTERRUPT(main_th->ec); + rb_threadptr_interrupt(main_th); + } + else { + RUBY_DEBUG_LOG("killed (%p)", (void *)main_th); + } + } +} + +void rb_thread_terminate_all(rb_thread_t *th); // thread.c + +static void +ractor_terminal_interrupt_all(rb_vm_t *vm) +{ + if (vm->ractor.cnt > 1) { + // send terminate notification to all ractors + rb_ractor_t *r = 0; + ccan_list_for_each(&vm->ractor.set, r, vmlr_node) { + if (r != vm->ractor.main_ractor) { + RUBY_DEBUG_LOG("r:%d", rb_ractor_id(r)); + rb_ractor_terminate_interrupt_main_thread(r); + } + } + } +} + +void rb_add_running_thread(rb_thread_t *th); +void rb_del_running_thread(rb_thread_t *th); + +void +rb_ractor_terminate_all(void) +{ + rb_vm_t *vm = GET_VM(); + rb_ractor_t *cr = vm->ractor.main_ractor; + + RUBY_DEBUG_LOG("ractor.cnt:%d", (int)vm->ractor.cnt); + + VM_ASSERT(cr == GET_RACTOR()); // only main-ractor's main-thread should kick it. + + RB_VM_LOCK(); + { + ractor_terminal_interrupt_all(vm); // kill all ractors + } + RB_VM_UNLOCK(); + rb_thread_terminate_all(GET_THREAD()); // kill other threads in main-ractor and wait + + RB_VM_LOCK(); + { + while (vm->ractor.cnt > 1) { + RUBY_DEBUG_LOG("terminate_waiting:%d", vm->ractor.sync.terminate_waiting); + vm->ractor.sync.terminate_waiting = true; + + // wait for 1sec + rb_vm_ractor_blocking_cnt_inc(vm, cr, __FILE__, __LINE__); + rb_del_running_thread(rb_ec_thread_ptr(cr->threads.running_ec)); + rb_vm_cond_timedwait(vm, &vm->ractor.sync.terminate_cond, 1000 /* ms */); +#ifdef RUBY_THREAD_PTHREAD_H + while (vm->ractor.sched.barrier_waiting) { + // A barrier is waiting. Threads relinquish the VM lock before joining the barrier and + // since we just acquired the VM lock back, we're blocking other threads from joining it. + // We loop until the barrier is over. We can't join this barrier because our thread isn't added to + // running_threads until the call below to `rb_add_running_thread`. + RB_VM_UNLOCK(); + unsigned int lev; + RB_VM_LOCK_ENTER_LEV_NB(&lev); + } +#endif + rb_add_running_thread(rb_ec_thread_ptr(cr->threads.running_ec)); + rb_vm_ractor_blocking_cnt_dec(vm, cr, __FILE__, __LINE__); + + ractor_terminal_interrupt_all(vm); + } + } + RB_VM_UNLOCK(); +} + +rb_execution_context_t * +rb_vm_main_ractor_ec(rb_vm_t *vm) +{ + /* This code needs to carefully work around two bugs: + * - Bug #20016: When M:N threading is enabled, running_ec is NULL if no thread is + * actually currently running (as opposed to without M:N threading, when + * running_ec will still point to the _last_ thread which ran) + * - Bug #20197: If the main thread is sleeping, setting its postponed job + * interrupt flag is pointless; it won't look at the flag until it stops sleeping + * for some reason. It would be better to set the flag on the running ec, which + * will presumably look at it soon. + * + * Solution: use running_ec if it's set, otherwise fall back to the main thread ec. + * This is still susceptible to some rare race conditions (what if the last thread + * to run just entered a long-running sleep?), but seems like the best balance of + * robustness and complexity. + */ + rb_execution_context_t *running_ec = vm->ractor.main_ractor->threads.running_ec; + if (running_ec) { return running_ec; } + return vm->ractor.main_thread->ec; +} + +static VALUE +ractor_moved_missing(int argc, VALUE *argv, VALUE self) +{ + rb_raise(rb_eRactorMovedError, "can not send any methods to a moved object"); +} + +/* + * Document-class: Ractor::Error + * + * The parent class of Ractor-related error classes. + */ + +/* + * Document-class: Ractor::ClosedError + * + * Raised when an attempt is made to send a message to a closed port, + * or to retrieve a message from a closed and empty port. + * Ports may be closed explicitly with Ractor::Port#close + * and are closed implicitly when a Ractor terminates. + * + * port = Ractor::Port.new + * port.close + * port << "test" # Ractor::ClosedError + * port.receive # Ractor::ClosedError + * + * ClosedError is a descendant of StopIteration, so the closing of a port will break + * out of loops without propagating the error. + */ + +/* + * Document-class: Ractor::IsolationError + * + * Raised on attempt to make a Ractor-unshareable object + * Ractor-shareable. + */ + +/* + * Document-class: Ractor::RemoteError + * + * Raised on Ractor#join or Ractor#value if there was an uncaught exception in the Ractor. + * Its +cause+ will contain the original exception, and +ractor+ is the original ractor + * it was raised in. + * + * r = Ractor.new { raise "Something weird happened" } + * + * begin + * r.value + * rescue => e + * p e # => #<Ractor::RemoteError: thrown by remote Ractor.> + * p e.ractor == r # => true + * p e.cause # => #<RuntimeError: Something weird happened> + * end + * + */ + +/* + * Document-class: Ractor::MovedError + * + * Raised on an attempt to access an object which was moved in Ractor#send or Ractor::Port#send. + * + * r = Ractor.new { sleep } + * + * ary = [1, 2, 3] + * r.send(ary, move: true) + * ary.inspect + * # Ractor::MovedError (can not send any methods to a moved object) + * + */ + +/* + * Document-class: Ractor::MovedObject + * + * A special object which replaces any value that was moved to another ractor in Ractor#send + * or Ractor::Port#send. Any attempt to access the object results in Ractor::MovedError. + * + * r = Ractor.new { receive } + * + * ary = [1, 2, 3] + * r.send(ary, move: true) + * p Ractor::MovedObject === ary + * # => true + * ary.inspect + * # Ractor::MovedError (can not send any methods to a moved object) + */ + +/* + * Document-class: Ractor::UnsafeError + * + * Raised when Ractor-unsafe C-methods is invoked by a non-main Ractor. + */ + +// Main docs are in ractor.rb, but without this clause there are weird artifacts +// in their rendering. +/* + * Document-class: Ractor + * + */ + +void +Init_Ractor(void) +{ + rb_cRactor = rb_define_class("Ractor", rb_cObject); + rb_undef_alloc_func(rb_cRactor); + + rb_eRactorError = rb_define_class_under(rb_cRactor, "Error", rb_eRuntimeError); + rb_eRactorIsolationError = rb_define_class_under(rb_cRactor, "IsolationError", rb_eRactorError); + rb_eRactorRemoteError = rb_define_class_under(rb_cRactor, "RemoteError", rb_eRactorError); + rb_eRactorMovedError = rb_define_class_under(rb_cRactor, "MovedError", rb_eRactorError); + rb_eRactorClosedError = rb_define_class_under(rb_cRactor, "ClosedError", rb_eStopIteration); + rb_eRactorUnsafeError = rb_define_class_under(rb_cRactor, "UnsafeError", rb_eRactorError); + + rb_cRactorMovedObject = rb_define_class_under(rb_cRactor, "MovedObject", rb_cBasicObject); + rb_undef_alloc_func(rb_cRactorMovedObject); + rb_define_method(rb_cRactorMovedObject, "method_missing", ractor_moved_missing, -1); + + // override methods defined in BasicObject + rb_define_method(rb_cRactorMovedObject, "__send__", ractor_moved_missing, -1); + rb_define_method(rb_cRactorMovedObject, "!", ractor_moved_missing, -1); + rb_define_method(rb_cRactorMovedObject, "==", ractor_moved_missing, -1); + rb_define_method(rb_cRactorMovedObject, "!=", ractor_moved_missing, -1); + rb_define_method(rb_cRactorMovedObject, "__id__", ractor_moved_missing, -1); + rb_define_method(rb_cRactorMovedObject, "equal?", ractor_moved_missing, -1); + rb_define_method(rb_cRactorMovedObject, "instance_eval", ractor_moved_missing, -1); + rb_define_method(rb_cRactorMovedObject, "instance_exec", ractor_moved_missing, -1); + + Init_RactorPort(); +} + +void +rb_ractor_dump(void) +{ + rb_vm_t *vm = GET_VM(); + rb_ractor_t *r = 0; + + ccan_list_for_each(&vm->ractor.set, r, vmlr_node) { + if (r != vm->ractor.main_ractor) { + fprintf(stderr, "r:%u (%s)\n", r->pub.id, ractor_status_str(r->status_)); + } + } +} + +VALUE +rb_ractor_stdin(void) +{ + if (rb_ractor_main_p()) { + return rb_stdin; + } + else { + rb_ractor_t *cr = GET_RACTOR(); + return cr->r_stdin; + } +} + +VALUE +rb_ractor_stdout(void) +{ + if (rb_ractor_main_p()) { + return rb_stdout; + } + else { + rb_ractor_t *cr = GET_RACTOR(); + return cr->r_stdout; + } +} + +VALUE +rb_ractor_stderr(void) +{ + if (rb_ractor_main_p()) { + return rb_stderr; + } + else { + rb_ractor_t *cr = GET_RACTOR(); + return cr->r_stderr; + } +} + +void +rb_ractor_stdin_set(VALUE in) +{ + if (rb_ractor_main_p()) { + rb_stdin = in; + } + else { + rb_ractor_t *cr = GET_RACTOR(); + RB_OBJ_WRITE(cr->pub.self, &cr->r_stdin, in); + } +} + +void +rb_ractor_stdout_set(VALUE out) +{ + if (rb_ractor_main_p()) { + rb_stdout = out; + } + else { + rb_ractor_t *cr = GET_RACTOR(); + RB_OBJ_WRITE(cr->pub.self, &cr->r_stdout, out); + } +} + +void +rb_ractor_stderr_set(VALUE err) +{ + if (rb_ractor_main_p()) { + rb_stderr = err; + } + else { + rb_ractor_t *cr = GET_RACTOR(); + RB_OBJ_WRITE(cr->pub.self, &cr->r_stderr, err); + } +} + +rb_hook_list_t * +rb_ractor_hooks(rb_ractor_t *cr) +{ + return &cr->pub.hooks; +} + +st_table * +rb_ractor_targeted_hooks(rb_ractor_t *cr) +{ + return cr->pub.targeted_hooks; +} + +static void +rb_obj_set_shareable_no_assert(VALUE obj) +{ + FL_SET_RAW(obj, FL_SHAREABLE); + + if (rb_obj_gen_fields_p(obj)) { + VALUE fields = rb_obj_fields_no_ractor_check(obj); + if (imemo_type_p(fields, imemo_fields)) { + // no recursive mark + FL_SET_RAW(fields, FL_SHAREABLE); + } + } +} + +#ifndef STRICT_VERIFY_SHAREABLE +#define STRICT_VERIFY_SHAREABLE 0 +#endif + +bool +rb_ractor_verify_shareable(VALUE obj) +{ +#if STRICT_VERIFY_SHAREABLE + rb_gc_verify_shareable(obj); +#endif + return true; +} + +VALUE +rb_obj_set_shareable(VALUE obj) +{ + RUBY_ASSERT(!RB_SPECIAL_CONST_P(obj)); + + rb_obj_set_shareable_no_assert(obj); + RUBY_ASSERT(rb_ractor_verify_shareable(obj)); + + return obj; +} + +/// traverse function + +// 2: stop search +// 1: skip child +// 0: continue + +enum obj_traverse_iterator_result { + traverse_cont, + traverse_skip, + traverse_stop, +}; + +typedef enum obj_traverse_iterator_result (*rb_obj_traverse_enter_func)(VALUE obj); +typedef enum obj_traverse_iterator_result (*rb_obj_traverse_leave_func)(VALUE obj); +typedef enum obj_traverse_iterator_result (*rb_obj_traverse_final_func)(VALUE obj); + +static enum obj_traverse_iterator_result null_leave(VALUE obj); + +struct obj_traverse_data { + rb_obj_traverse_enter_func enter_func; + rb_obj_traverse_leave_func leave_func; + + st_table *rec; + VALUE rec_hash; +}; + + +struct obj_traverse_callback_data { + bool stop; + struct obj_traverse_data *data; +}; + +static int obj_traverse_i(VALUE obj, struct obj_traverse_data *data); + +static int +obj_hash_traverse_i(VALUE key, VALUE val, VALUE ptr) +{ + struct obj_traverse_callback_data *d = (struct obj_traverse_callback_data *)ptr; + + if (obj_traverse_i(key, d->data)) { + d->stop = true; + return ST_STOP; + } + + if (obj_traverse_i(val, d->data)) { + d->stop = true; + return ST_STOP; + } + + return ST_CONTINUE; +} + +static void +obj_traverse_reachable_i(VALUE obj, void *ptr) +{ + struct obj_traverse_callback_data *d = (struct obj_traverse_callback_data *)ptr; + + if (obj_traverse_i(obj, d->data)) { + d->stop = true; + } +} + +static struct st_table * +obj_traverse_rec(struct obj_traverse_data *data) +{ + if (UNLIKELY(!data->rec)) { + data->rec_hash = rb_ident_hash_new(); + data->rec = RHASH_ST_TABLE(data->rec_hash); + } + return data->rec; +} + +static int +obj_traverse_ivar_foreach_i(ID key, VALUE val, st_data_t ptr) +{ + struct obj_traverse_callback_data *d = (struct obj_traverse_callback_data *)ptr; + + if (obj_traverse_i(val, d->data)) { + d->stop = true; + return ST_STOP; + } + + return ST_CONTINUE; +} + +static int +obj_traverse_i(VALUE obj, struct obj_traverse_data *data) +{ + if (RB_SPECIAL_CONST_P(obj)) return 0; + + switch (data->enter_func(obj)) { + case traverse_cont: break; + case traverse_skip: return 0; // skip children + case traverse_stop: return 1; // stop search + } + + if (UNLIKELY(st_insert(obj_traverse_rec(data), obj, 1))) { + // already traversed + return 0; + } + RB_OBJ_WRITTEN(data->rec_hash, Qundef, obj); + + struct obj_traverse_callback_data d = { + .stop = false, + .data = data, + }; + rb_ivar_foreach(obj, obj_traverse_ivar_foreach_i, (st_data_t)&d); + if (d.stop) return 1; + + switch (BUILTIN_TYPE(obj)) { + // no child node + case T_STRING: + case T_FLOAT: + case T_BIGNUM: + case T_REGEXP: + case T_FILE: + case T_SYMBOL: + break; + + case T_OBJECT: + /* Instance variables already traversed. */ + break; + + case T_ARRAY: + { + rb_ary_cancel_sharing(obj); + + for (int i = 0; i < RARRAY_LENINT(obj); i++) { + VALUE e = rb_ary_entry(obj, i); + if (obj_traverse_i(e, data)) return 1; + } + } + break; + + case T_HASH: + { + if (obj_traverse_i(RHASH_IFNONE(obj), data)) return 1; + + struct obj_traverse_callback_data d = { + .stop = false, + .data = data, + }; + rb_hash_foreach(obj, obj_hash_traverse_i, (VALUE)&d); + if (d.stop) return 1; + } + break; + + case T_STRUCT: + { + long len = RSTRUCT_LEN_RAW(obj); + const VALUE *ptr = RSTRUCT_CONST_PTR(obj); + + for (long i=0; i<len; i++) { + if (obj_traverse_i(ptr[i], data)) return 1; + } + } + break; + + case T_MATCH: + if (obj_traverse_i(RMATCH(obj)->str, data)) return 1; + break; + + case T_RATIONAL: + if (obj_traverse_i(RRATIONAL(obj)->num, data)) return 1; + if (obj_traverse_i(RRATIONAL(obj)->den, data)) return 1; + break; + case T_COMPLEX: + if (obj_traverse_i(RCOMPLEX(obj)->real, data)) return 1; + if (obj_traverse_i(RCOMPLEX(obj)->imag, data)) return 1; + break; + + case T_DATA: + case T_IMEMO: + { + struct obj_traverse_callback_data d = { + .stop = false, + .data = data, + }; + RB_VM_LOCKING_NO_BARRIER() { + rb_objspace_reachable_objects_from(obj, obj_traverse_reachable_i, &d); + } + if (d.stop) return 1; + } + break; + + // unreachable + case T_CLASS: + case T_MODULE: + case T_ICLASS: + default: + rp(obj); + rb_bug("unreachable"); + } + + if (data->leave_func(obj) == traverse_stop) { + return 1; + } + else { + return 0; + } +} + +struct rb_obj_traverse_final_data { + rb_obj_traverse_final_func final_func; + int stopped; +}; + +static int +obj_traverse_final_i(st_data_t key, st_data_t val, st_data_t arg) +{ + struct rb_obj_traverse_final_data *data = (void *)arg; + if (data->final_func(key)) { + data->stopped = 1; + return ST_STOP; + } + return ST_CONTINUE; +} + +// 0: traverse all +// 1: stopped +static int +rb_obj_traverse(VALUE obj, + rb_obj_traverse_enter_func enter_func, + rb_obj_traverse_leave_func leave_func, + rb_obj_traverse_final_func final_func) +{ + struct obj_traverse_data data = { + .enter_func = enter_func, + .leave_func = leave_func, + .rec = NULL, + }; + + if (obj_traverse_i(obj, &data)) return 1; + if (final_func && data.rec) { + struct rb_obj_traverse_final_data f = {final_func, 0}; + st_foreach(data.rec, obj_traverse_final_i, (st_data_t)&f); + return f.stopped; + } + return 0; +} + +static int +allow_frozen_shareable_p(VALUE obj) +{ + if (!RB_TYPE_P(obj, T_DATA)) { + return true; + } + else if (RTYPEDDATA_P(obj)) { + const rb_data_type_t *type = RTYPEDDATA_TYPE(obj); + if (type->flags & RUBY_TYPED_FROZEN_SHAREABLE) { + return true; + } + } + + return false; +} + +static enum obj_traverse_iterator_result +make_shareable_check_shareable_freeze(VALUE obj, enum obj_traverse_iterator_result result) +{ + if (!RB_OBJ_FROZEN_RAW(obj)) { + rb_funcall(obj, idFreeze, 0); + + if (UNLIKELY(!RB_OBJ_FROZEN_RAW(obj))) { + rb_raise(rb_eRactorError, "#freeze does not freeze object correctly"); + } + + if (RB_OBJ_SHAREABLE_P(obj)) { + return traverse_skip; + } + } + + return result; +} + +static int obj_refer_only_shareables_p(VALUE obj); + +static enum obj_traverse_iterator_result +make_shareable_check_shareable(VALUE obj) +{ + VM_ASSERT(!SPECIAL_CONST_P(obj)); + + if (rb_ractor_shareable_p(obj)) { + return traverse_skip; + } + else if (!allow_frozen_shareable_p(obj)) { + VM_ASSERT(RB_TYPE_P(obj, T_DATA)); + const rb_data_type_t *type = RTYPEDDATA_TYPE(obj); + + if (type->flags & RUBY_TYPED_FROZEN_SHAREABLE_NO_REC) { + if (obj_refer_only_shareables_p(obj)) { + make_shareable_check_shareable_freeze(obj, traverse_skip); + RB_OBJ_SET_SHAREABLE(obj); + return traverse_skip; + } + else { + rb_raise(rb_eRactorError, + "can not make shareable object for %+"PRIsVALUE" because it refers unshareable objects", obj); + } + } + else if (rb_obj_is_proc(obj)) { + rb_proc_ractor_make_shareable(obj, Qundef); + return traverse_cont; + } + else { + rb_raise(rb_eRactorError, "can not make shareable object for %+"PRIsVALUE, obj); + } + } + + switch (TYPE(obj)) { + case T_IMEMO: + return traverse_skip; + case T_OBJECT: + { + // If a T_OBJECT is shared and has no free capacity, we can't safely store the object_id inline, + // as it would require to move the object content into an external buffer. + // This is only a problem for T_OBJECT, given other types have external fields and can do RCU. + // To avoid this issue, we proactively create the object_id. + shape_id_t shape_id = RBASIC_SHAPE_ID(obj); + attr_index_t capacity = RSHAPE_CAPACITY(shape_id); + attr_index_t free_capacity = capacity - RSHAPE_LEN(shape_id); + if (!rb_shape_has_object_id(shape_id) && capacity && !free_capacity) { + rb_obj_id(obj); + } + } + break; + default: + break; + } + + return make_shareable_check_shareable_freeze(obj, traverse_cont); +} + +static enum obj_traverse_iterator_result +mark_shareable(VALUE obj) +{ + if (RB_TYPE_P(obj, T_STRING)) { + rb_str_make_independent(obj); + } + + rb_obj_set_shareable_no_assert(obj); + return traverse_cont; +} + +VALUE +rb_ractor_make_shareable(VALUE obj) +{ + rb_obj_traverse(obj, + make_shareable_check_shareable, + null_leave, mark_shareable); + return obj; +} + +VALUE +rb_ractor_make_shareable_copy(VALUE obj) +{ + VALUE copy = ractor_copy(obj); + return rb_ractor_make_shareable(copy); +} + +VALUE +rb_ractor_ensure_shareable(VALUE obj, VALUE name) +{ + if (!rb_ractor_shareable_p(obj)) { + VALUE message = rb_sprintf("cannot assign unshareable object to %"PRIsVALUE, + name); + rb_exc_raise(rb_exc_new_str(rb_eRactorIsolationError, message)); + } + return obj; +} + +void +rb_ractor_ensure_main_ractor(const char *msg) +{ + if (!rb_ractor_main_p()) { + rb_raise(rb_eRactorIsolationError, "%s", msg); + } +} + +static enum obj_traverse_iterator_result +shareable_p_enter(VALUE obj) +{ + if (RB_OBJ_SHAREABLE_P(obj)) { + return traverse_skip; + } + else if (RB_TYPE_P(obj, T_CLASS) || + RB_TYPE_P(obj, T_MODULE) || + RB_TYPE_P(obj, T_ICLASS)) { + // TODO: remove it + mark_shareable(obj); + return traverse_skip; + } + else if (RB_OBJ_FROZEN_RAW(obj) && + allow_frozen_shareable_p(obj)) { + return traverse_cont; + } + + return traverse_stop; // fail +} + +bool +rb_ractor_shareable_p_continue(VALUE obj) +{ + if (rb_obj_traverse(obj, + shareable_p_enter, null_leave, + mark_shareable)) { + return false; + } + else { + return true; + } +} + +#if RACTOR_CHECK_MODE > 0 +void +rb_ractor_setup_belonging(VALUE obj) +{ + rb_ractor_setup_belonging_to(obj, rb_ractor_current_id()); +} + +static enum obj_traverse_iterator_result +reset_belonging_enter(VALUE obj) +{ + if (rb_ractor_shareable_p(obj)) { + return traverse_skip; + } + else { + rb_ractor_setup_belonging(obj); + return traverse_cont; + } +} +#endif + +static enum obj_traverse_iterator_result +null_leave(VALUE obj) +{ + return traverse_cont; +} + +static VALUE +ractor_reset_belonging(VALUE obj) +{ +#if RACTOR_CHECK_MODE > 0 + rb_obj_traverse(obj, reset_belonging_enter, null_leave, NULL); +#endif + return obj; +} + + +/// traverse and replace function + +// 2: stop search +// 1: skip child +// 0: continue + +struct obj_traverse_replace_data; +static int obj_traverse_replace_i(VALUE obj, struct obj_traverse_replace_data *data); +typedef enum obj_traverse_iterator_result (*rb_obj_traverse_replace_enter_func)(VALUE obj, struct obj_traverse_replace_data *data); +typedef enum obj_traverse_iterator_result (*rb_obj_traverse_replace_leave_func)(VALUE obj, struct obj_traverse_replace_data *data); + +struct obj_traverse_replace_data { + rb_obj_traverse_replace_enter_func enter_func; + rb_obj_traverse_replace_leave_func leave_func; + + st_table *rec; + VALUE rec_hash; + + VALUE replacement; + bool move; +}; + +struct obj_traverse_replace_callback_data { + bool stop; + VALUE src; + struct obj_traverse_replace_data *data; +}; + +static int +obj_hash_traverse_replace_foreach_i(st_data_t key, st_data_t value, st_data_t argp, int error) +{ + return ST_REPLACE; +} + +static int +obj_hash_traverse_replace_i(st_data_t *key, st_data_t *val, st_data_t ptr, int exists) +{ + struct obj_traverse_replace_callback_data *d = (struct obj_traverse_replace_callback_data *)ptr; + struct obj_traverse_replace_data *data = d->data; + + if (obj_traverse_replace_i(*key, data)) { + d->stop = true; + return ST_STOP; + } + else if (*key != data->replacement) { + VALUE v = *key = data->replacement; + RB_OBJ_WRITTEN(d->src, Qundef, v); + } + + if (obj_traverse_replace_i(*val, data)) { + d->stop = true; + return ST_STOP; + } + else if (*val != data->replacement) { + VALUE v = *val = data->replacement; + RB_OBJ_WRITTEN(d->src, Qundef, v); + } + + return ST_CONTINUE; +} + +static int +obj_iv_hash_traverse_replace_foreach_i(st_data_t _key, st_data_t _val, st_data_t _data, int _x) +{ + return ST_REPLACE; +} + +static int +obj_iv_hash_traverse_replace_i(st_data_t * _key, st_data_t * val, st_data_t ptr, int exists) +{ + struct obj_traverse_replace_callback_data *d = (struct obj_traverse_replace_callback_data *)ptr; + struct obj_traverse_replace_data *data = d->data; + + if (obj_traverse_replace_i(*(VALUE *)val, data)) { + d->stop = true; + return ST_STOP; + } + else if (*(VALUE *)val != data->replacement) { + VALUE v = *(VALUE *)val = data->replacement; + RB_OBJ_WRITTEN(d->src, Qundef, v); + } + + return ST_CONTINUE; +} + +static struct st_table * +obj_traverse_replace_rec(struct obj_traverse_replace_data *data) +{ + if (UNLIKELY(!data->rec)) { + data->rec_hash = rb_ident_hash_new(); + data->rec = RHASH_ST_TABLE(data->rec_hash); + } + return data->rec; +} + +static void +obj_refer_only_shareables_p_i(VALUE obj, void *ptr) +{ + int *pcnt = (int *)ptr; + + if (!rb_ractor_shareable_p(obj)) { + ++*pcnt; + } +} + +static int +obj_refer_only_shareables_p(VALUE obj) +{ + int cnt = 0; + RB_VM_LOCKING_NO_BARRIER() { + rb_objspace_reachable_objects_from(obj, obj_refer_only_shareables_p_i, &cnt); + } + return cnt == 0; +} + +static int +obj_traverse_replace_i(VALUE obj, struct obj_traverse_replace_data *data) +{ + st_data_t replacement; + + if (RB_SPECIAL_CONST_P(obj)) { + data->replacement = obj; + return 0; + } + + switch (data->enter_func(obj, data)) { + case traverse_cont: break; + case traverse_skip: return 0; // skip children + case traverse_stop: return 1; // stop search + } + + replacement = (st_data_t)data->replacement; + + if (UNLIKELY(st_lookup(obj_traverse_replace_rec(data), (st_data_t)obj, &replacement))) { + data->replacement = (VALUE)replacement; + return 0; + } + else { + st_insert(obj_traverse_replace_rec(data), (st_data_t)obj, replacement); + RB_OBJ_WRITTEN(data->rec_hash, Qundef, obj); + RB_OBJ_WRITTEN(data->rec_hash, Qundef, replacement); + } + + if (!data->move) { + obj = replacement; + } + +#define CHECK_AND_REPLACE(parent_obj, v) do { \ + VALUE _val = (v); \ + if (obj_traverse_replace_i(_val, data)) { return 1; } \ + else if (data->replacement != _val) { RB_OBJ_WRITE(parent_obj, &v, data->replacement); } \ +} while (0) + + if (UNLIKELY(rb_obj_gen_fields_p(obj))) { + VALUE fields_obj = rb_obj_fields_no_ractor_check(obj); + + if (UNLIKELY(rb_shape_obj_too_complex_p(obj))) { + struct obj_traverse_replace_callback_data d = { + .stop = false, + .data = data, + .src = fields_obj, + }; + rb_st_foreach_with_replace( + rb_imemo_fields_complex_tbl(fields_obj), + obj_iv_hash_traverse_replace_foreach_i, + obj_iv_hash_traverse_replace_i, + (st_data_t)&d + ); + if (d.stop) return 1; + } + else { + uint32_t fields_count = RSHAPE_LEN(RBASIC_SHAPE_ID(obj)); + VALUE *fields = rb_imemo_fields_ptr(fields_obj); + for (uint32_t i = 0; i < fields_count; i++) { + CHECK_AND_REPLACE(fields_obj, fields[i]); + } + } + } + + switch (BUILTIN_TYPE(obj)) { + // no child node + case T_FLOAT: + case T_BIGNUM: + case T_REGEXP: + case T_FILE: + case T_SYMBOL: + break; + case T_STRING: + rb_str_make_independent(obj); + break; + + case T_OBJECT: + { + if (rb_shape_obj_too_complex_p(obj)) { + struct obj_traverse_replace_callback_data d = { + .stop = false, + .data = data, + .src = obj, + }; + rb_st_foreach_with_replace( + ROBJECT_FIELDS_HASH(obj), + obj_iv_hash_traverse_replace_foreach_i, + obj_iv_hash_traverse_replace_i, + (st_data_t)&d + ); + if (d.stop) return 1; + } + else { + uint32_t len = ROBJECT_FIELDS_COUNT_NOT_COMPLEX(obj); + VALUE *ptr = ROBJECT_FIELDS(obj); + + for (uint32_t i = 0; i < len; i++) { + CHECK_AND_REPLACE(obj, ptr[i]); + } + } + } + break; + + case T_ARRAY: + { + rb_ary_cancel_sharing(obj); + + for (int i = 0; i < RARRAY_LENINT(obj); i++) { + VALUE e = rb_ary_entry(obj, i); + + if (obj_traverse_replace_i(e, data)) { + return 1; + } + else if (e != data->replacement) { + RARRAY_ASET(obj, i, data->replacement); + } + } + RB_GC_GUARD(obj); + } + break; + case T_HASH: + { + struct obj_traverse_replace_callback_data d = { + .stop = false, + .data = data, + .src = obj, + }; + rb_hash_stlike_foreach_with_replace(obj, + obj_hash_traverse_replace_foreach_i, + obj_hash_traverse_replace_i, + (VALUE)&d); + if (d.stop) return 1; + // TODO: rehash here? + + VALUE ifnone = RHASH_IFNONE(obj); + if (obj_traverse_replace_i(ifnone, data)) { + return 1; + } + else if (ifnone != data->replacement) { + RHASH_SET_IFNONE(obj, data->replacement); + } + } + break; + + case T_STRUCT: + { + long len = RSTRUCT_LEN_RAW(obj); + const VALUE *ptr = RSTRUCT_CONST_PTR(obj); + + for (long i=0; i<len; i++) { + CHECK_AND_REPLACE(obj, ptr[i]); + } + } + break; + + case T_MATCH: + CHECK_AND_REPLACE(obj, RMATCH(obj)->str); + break; + + case T_RATIONAL: + CHECK_AND_REPLACE(obj, RRATIONAL(obj)->num); + CHECK_AND_REPLACE(obj, RRATIONAL(obj)->den); + break; + case T_COMPLEX: + CHECK_AND_REPLACE(obj, RCOMPLEX(obj)->real); + CHECK_AND_REPLACE(obj, RCOMPLEX(obj)->imag); + break; + + case T_DATA: + if (!data->move && obj_refer_only_shareables_p(obj)) { + break; + } + else { + rb_raise(rb_eRactorError, "can not %s %"PRIsVALUE" object.", + data->move ? "move" : "copy", rb_class_of(obj)); + } + + case T_IMEMO: + // not supported yet + return 1; + + // unreachable + case T_CLASS: + case T_MODULE: + case T_ICLASS: + default: + rp(obj); + rb_bug("unreachable"); + } + + data->replacement = (VALUE)replacement; + + if (data->leave_func(obj, data) == traverse_stop) { + return 1; + } + else { + return 0; + } +} + +// 0: traverse all +// 1: stopped +static VALUE +rb_obj_traverse_replace(VALUE obj, + rb_obj_traverse_replace_enter_func enter_func, + rb_obj_traverse_replace_leave_func leave_func, + bool move) +{ + struct obj_traverse_replace_data data = { + .enter_func = enter_func, + .leave_func = leave_func, + .rec = NULL, + .replacement = Qundef, + .move = move, + }; + + if (obj_traverse_replace_i(obj, &data)) { + return Qundef; + } + else { + return data.replacement; + } +} + +static const bool wb_protected_types[RUBY_T_MASK] = { + [T_OBJECT] = RGENGC_WB_PROTECTED_OBJECT, + [T_HASH] = RGENGC_WB_PROTECTED_HASH, + [T_ARRAY] = RGENGC_WB_PROTECTED_ARRAY, + [T_STRING] = RGENGC_WB_PROTECTED_STRING, + [T_STRUCT] = RGENGC_WB_PROTECTED_STRUCT, + [T_COMPLEX] = RGENGC_WB_PROTECTED_COMPLEX, + [T_REGEXP] = RGENGC_WB_PROTECTED_REGEXP, + [T_MATCH] = RGENGC_WB_PROTECTED_MATCH, + [T_FLOAT] = RGENGC_WB_PROTECTED_FLOAT, + [T_RATIONAL] = RGENGC_WB_PROTECTED_RATIONAL, +}; + +static enum obj_traverse_iterator_result +move_enter(VALUE obj, struct obj_traverse_replace_data *data) +{ + if (rb_ractor_shareable_p(obj)) { + data->replacement = obj; + return traverse_skip; + } + else { + VALUE type = RB_BUILTIN_TYPE(obj); + size_t slot_size = rb_gc_obj_slot_size(obj); + type |= wb_protected_types[type] ? FL_WB_PROTECTED : 0; + NEWOBJ_OF(moved, struct RBasic, 0, type, slot_size, 0); + MEMZERO(&moved[1], char, slot_size - sizeof(*moved)); + data->replacement = (VALUE)moved; + return traverse_cont; + } +} + +static enum obj_traverse_iterator_result +move_leave(VALUE obj, struct obj_traverse_replace_data *data) +{ + // Copy flags + VALUE ignored_flags = RUBY_FL_PROMOTED; + RBASIC(data->replacement)->flags = (RBASIC(obj)->flags & ~ignored_flags) | (RBASIC(data->replacement)->flags & ignored_flags); + // Copy contents without the flags + memcpy( + (char *)data->replacement + sizeof(VALUE), + (char *)obj + sizeof(VALUE), + rb_gc_obj_slot_size(obj) - sizeof(VALUE) + ); + + // We've copied obj's references to the replacement + rb_gc_writebarrier_remember(data->replacement); + + void rb_replace_generic_ivar(VALUE clone, VALUE obj); // variable.c + if (UNLIKELY(rb_obj_gen_fields_p(obj))) { + rb_replace_generic_ivar(data->replacement, obj); + } + + rb_gc_obj_id_moved(data->replacement); + + VALUE flags = T_OBJECT | FL_FREEZE | (RBASIC(obj)->flags & FL_PROMOTED); + + // Avoid mutations using bind_call, etc. + MEMZERO((char *)obj, char, sizeof(struct RBasic)); + RBASIC(obj)->flags = flags; + RBASIC_SET_CLASS_RAW(obj, rb_cRactorMovedObject); + return traverse_cont; +} + +static VALUE +ractor_move(VALUE obj) +{ + VALUE val = rb_obj_traverse_replace(obj, move_enter, move_leave, true); + if (!UNDEF_P(val)) { + return val; + } + else { + rb_raise(rb_eRactorError, "can not move the object"); + } +} + +static enum obj_traverse_iterator_result +copy_enter(VALUE obj, struct obj_traverse_replace_data *data) +{ + if (rb_ractor_shareable_p(obj)) { + data->replacement = obj; + return traverse_skip; + } + else { + data->replacement = rb_obj_clone(obj); + return traverse_cont; + } +} + +static enum obj_traverse_iterator_result +copy_leave(VALUE obj, struct obj_traverse_replace_data *data) +{ + return traverse_cont; +} + +static VALUE +ractor_copy(VALUE obj) +{ + VALUE val = rb_obj_traverse_replace(obj, copy_enter, copy_leave, false); + if (!UNDEF_P(val)) { + return val; + } + else { + rb_raise(rb_eRactorError, "can not copy the object"); + } +} + +// Ractor local storage + +struct rb_ractor_local_key_struct { + const struct rb_ractor_local_storage_type *type; + void *main_cache; +}; + +static struct freed_ractor_local_keys_struct { + int cnt; + int capa; + rb_ractor_local_key_t *keys; +} freed_ractor_local_keys; + +static int +ractor_local_storage_mark_i(st_data_t key, st_data_t val, st_data_t dmy) +{ + struct rb_ractor_local_key_struct *k = (struct rb_ractor_local_key_struct *)key; + if (k->type->mark) (*k->type->mark)((void *)val); + return ST_CONTINUE; +} + +static enum rb_id_table_iterator_result +idkey_local_storage_mark_i(VALUE val, void *dmy) +{ + rb_gc_mark(val); + return ID_TABLE_CONTINUE; +} + +static void +ractor_local_storage_mark(rb_ractor_t *r) +{ + if (r->local_storage) { + st_foreach(r->local_storage, ractor_local_storage_mark_i, 0); + + for (int i=0; i<freed_ractor_local_keys.cnt; i++) { + rb_ractor_local_key_t key = freed_ractor_local_keys.keys[i]; + st_data_t val, k = (st_data_t)key; + if (st_delete(r->local_storage, &k, &val) && + (key = (rb_ractor_local_key_t)k)->type->free) { + (*key->type->free)((void *)val); + } + } + } + + if (r->idkey_local_storage) { + rb_id_table_foreach_values(r->idkey_local_storage, idkey_local_storage_mark_i, NULL); + } + + rb_gc_mark(r->local_storage_store_lock); +} + +static int +ractor_local_storage_free_i(st_data_t key, st_data_t val, st_data_t dmy) +{ + struct rb_ractor_local_key_struct *k = (struct rb_ractor_local_key_struct *)key; + if (k->type->free) (*k->type->free)((void *)val); + return ST_CONTINUE; +} + +static void +ractor_local_storage_free(rb_ractor_t *r) +{ + if (r->local_storage) { + st_foreach(r->local_storage, ractor_local_storage_free_i, 0); + st_free_table(r->local_storage); + } + + if (r->idkey_local_storage) { + rb_id_table_free(r->idkey_local_storage); + } +} + +static void +rb_ractor_local_storage_value_mark(void *ptr) +{ + rb_gc_mark((VALUE)ptr); +} + +static const struct rb_ractor_local_storage_type ractor_local_storage_type_null = { + NULL, + NULL, +}; + +const struct rb_ractor_local_storage_type rb_ractor_local_storage_type_free = { + NULL, + ruby_xfree, +}; + +static const struct rb_ractor_local_storage_type ractor_local_storage_type_value = { + rb_ractor_local_storage_value_mark, + NULL, +}; + +rb_ractor_local_key_t +rb_ractor_local_storage_ptr_newkey(const struct rb_ractor_local_storage_type *type) +{ + rb_ractor_local_key_t key = ALLOC(struct rb_ractor_local_key_struct); + key->type = type ? type : &ractor_local_storage_type_null; + key->main_cache = (void *)Qundef; + return key; +} + +rb_ractor_local_key_t +rb_ractor_local_storage_value_newkey(void) +{ + return rb_ractor_local_storage_ptr_newkey(&ractor_local_storage_type_value); +} + +void +rb_ractor_local_storage_delkey(rb_ractor_local_key_t key) +{ + RB_VM_LOCKING() { + if (freed_ractor_local_keys.cnt == freed_ractor_local_keys.capa) { + freed_ractor_local_keys.capa = freed_ractor_local_keys.capa ? freed_ractor_local_keys.capa * 2 : 4; + REALLOC_N(freed_ractor_local_keys.keys, rb_ractor_local_key_t, freed_ractor_local_keys.capa); + } + freed_ractor_local_keys.keys[freed_ractor_local_keys.cnt++] = key; + } +} + +static bool +ractor_local_ref(rb_ractor_local_key_t key, void **pret) +{ + if (rb_ractor_main_p()) { + if (!UNDEF_P((VALUE)key->main_cache)) { + *pret = key->main_cache; + return true; + } + else { + return false; + } + } + else { + rb_ractor_t *cr = GET_RACTOR(); + + if (cr->local_storage && st_lookup(cr->local_storage, (st_data_t)key, (st_data_t *)pret)) { + return true; + } + else { + return false; + } + } +} + +static void +ractor_local_set(rb_ractor_local_key_t key, void *ptr) +{ + rb_ractor_t *cr = GET_RACTOR(); + + if (cr->local_storage == NULL) { + cr->local_storage = st_init_numtable(); + } + + st_insert(cr->local_storage, (st_data_t)key, (st_data_t)ptr); + + if (rb_ractor_main_p()) { + key->main_cache = ptr; + } +} + +VALUE +rb_ractor_local_storage_value(rb_ractor_local_key_t key) +{ + void *val; + if (ractor_local_ref(key, &val)) { + return (VALUE)val; + } + else { + return Qnil; + } +} + +bool +rb_ractor_local_storage_value_lookup(rb_ractor_local_key_t key, VALUE *val) +{ + if (ractor_local_ref(key, (void **)val)) { + return true; + } + else { + return false; + } +} + +void +rb_ractor_local_storage_value_set(rb_ractor_local_key_t key, VALUE val) +{ + ractor_local_set(key, (void *)val); +} + +void * +rb_ractor_local_storage_ptr(rb_ractor_local_key_t key) +{ + void *ret; + if (ractor_local_ref(key, &ret)) { + return ret; + } + else { + return NULL; + } +} + +void +rb_ractor_local_storage_ptr_set(rb_ractor_local_key_t key, void *ptr) +{ + ractor_local_set(key, ptr); +} + +#define DEFAULT_KEYS_CAPA 0x10 + +void +rb_ractor_finish_marking(void) +{ + for (int i=0; i<freed_ractor_local_keys.cnt; i++) { + ruby_xfree(freed_ractor_local_keys.keys[i]); + } + freed_ractor_local_keys.cnt = 0; + if (freed_ractor_local_keys.capa > DEFAULT_KEYS_CAPA) { + freed_ractor_local_keys.capa = DEFAULT_KEYS_CAPA; + REALLOC_N(freed_ractor_local_keys.keys, rb_ractor_local_key_t, DEFAULT_KEYS_CAPA); + } +} + +static VALUE +ractor_local_value(rb_execution_context_t *ec, VALUE self, VALUE sym) +{ + rb_ractor_t *cr = rb_ec_ractor_ptr(ec); + ID id = rb_check_id(&sym); + struct rb_id_table *tbl = cr->idkey_local_storage; + VALUE val; + + if (id && tbl && rb_id_table_lookup(tbl, id, &val)) { + return val; + } + else { + return Qnil; + } +} + +static VALUE +ractor_local_value_set(rb_execution_context_t *ec, VALUE self, VALUE sym, VALUE val) +{ + rb_ractor_t *cr = rb_ec_ractor_ptr(ec); + ID id = SYM2ID(rb_to_symbol(sym)); + struct rb_id_table *tbl = cr->idkey_local_storage; + + if (tbl == NULL) { + tbl = cr->idkey_local_storage = rb_id_table_create(2); + } + rb_id_table_insert(tbl, id, val); + return val; +} + +struct ractor_local_storage_store_data { + rb_execution_context_t *ec; + struct rb_id_table *tbl; + ID id; + VALUE sym; +}; + +static VALUE +ractor_local_value_store_i(VALUE ptr) +{ + VALUE val; + struct ractor_local_storage_store_data *data = (struct ractor_local_storage_store_data *)ptr; + + if (rb_id_table_lookup(data->tbl, data->id, &val)) { + // after synchronization, we found already registered entry + } + else { + val = rb_yield(Qnil); + ractor_local_value_set(data->ec, Qnil, data->sym, val); + } + return val; +} + +static VALUE +ractor_local_value_store_if_absent(rb_execution_context_t *ec, VALUE self, VALUE sym) +{ + rb_ractor_t *cr = rb_ec_ractor_ptr(ec); + struct ractor_local_storage_store_data data = { + .ec = ec, + .sym = sym, + .id = SYM2ID(rb_to_symbol(sym)), + .tbl = cr->idkey_local_storage, + }; + VALUE val; + + if (data.tbl == NULL) { + data.tbl = cr->idkey_local_storage = rb_id_table_create(2); + } + else if (rb_id_table_lookup(data.tbl, data.id, &val)) { + // already set + return val; + } + + if (!cr->local_storage_store_lock) { + cr->local_storage_store_lock = rb_mutex_new(); + } + + return rb_mutex_synchronize(cr->local_storage_store_lock, ractor_local_value_store_i, (VALUE)&data); +} + +// shareable_proc + +static VALUE +ractor_shareable_proc(rb_execution_context_t *ec, VALUE replace_self, bool is_lambda) +{ + if (!rb_ractor_shareable_p(replace_self)) { + rb_raise(rb_eRactorIsolationError, "self should be shareable: %" PRIsVALUE, replace_self); + } + else { + VALUE proc = is_lambda ? rb_block_lambda() : rb_block_proc(); + return rb_proc_ractor_make_shareable(rb_proc_dup(proc), replace_self); + } +} + +// Ractor#require + +struct cross_ractor_require { + VALUE port; + bool raised; + + union { + struct { + VALUE feature; + } require; + + struct { + VALUE module; + ID name; + } autoload; + } as; + + bool silent; +}; + +RUBY_REFERENCES(cross_ractor_require_refs) = { + RUBY_REF_EDGE(struct cross_ractor_require, port), + RUBY_REF_EDGE(struct cross_ractor_require, as.require.feature), + RUBY_REF_END +}; + +static const rb_data_type_t cross_ractor_require_data_type = { + "ractor/cross_ractor_require", + { + RUBY_REFS_LIST_PTR(cross_ractor_require_refs), + RUBY_DEFAULT_FREE, + NULL, // memsize + NULL, // compact + }, + 0, 0, RUBY_TYPED_FREE_IMMEDIATELY | RUBY_TYPED_WB_PROTECTED | RUBY_TYPED_DECL_MARKING | RUBY_TYPED_EMBEDDABLE +}; + +static VALUE +require_body(VALUE crr_obj) +{ + struct cross_ractor_require *crr; + TypedData_Get_Struct(crr_obj, struct cross_ractor_require, &cross_ractor_require_data_type, crr); + VALUE feature = crr->as.require.feature; + + ID require; + CONST_ID(require, "require"); + + if (crr->silent) { + int rb_require_internal_silent(VALUE fname); + return INT2NUM(rb_require_internal_silent(feature)); + } + else { + return rb_funcallv(Qnil, require, 1, &feature); + } +} + +static VALUE +require_rescue(VALUE crr_obj, VALUE errinfo) +{ + struct cross_ractor_require *crr; + TypedData_Get_Struct(crr_obj, struct cross_ractor_require, &cross_ractor_require_data_type, crr); + crr->raised = true; + return errinfo; +} + +static VALUE +require_result_send_body(VALUE ary) +{ + VALUE port = RARRAY_AREF(ary, 0); + VALUE results = RARRAY_AREF(ary, 1); + + rb_execution_context_t *ec = GET_EC(); + + ractor_port_send(ec, port, results, Qfalse); + return Qnil; +} + +static VALUE +require_result_send_resuce(VALUE port, VALUE errinfo) +{ + // TODO: need rescue? + ractor_port_send(GET_EC(), port, errinfo, Qfalse); + return Qnil; +} + +static VALUE +ractor_require_protect(VALUE crr_obj, VALUE (*func)(VALUE)) +{ + struct cross_ractor_require *crr; + TypedData_Get_Struct(crr_obj, struct cross_ractor_require, &cross_ractor_require_data_type, crr); + + const bool silent = crr->silent; + + VALUE debug, errinfo; + if (silent) { + debug = ruby_debug; + errinfo = rb_errinfo(); + } + + // get normal result or raised exception (with crr->raised == true) + VALUE result = rb_rescue2(func, crr_obj, require_rescue, crr_obj, rb_eException, 0); + + if (silent) { + ruby_debug = debug; + rb_set_errinfo(errinfo); + } + + rb_rescue2(require_result_send_body, + // [port, [result, raised]] + rb_ary_new_from_args(2, crr->port, rb_ary_new_from_args(2, result, crr->raised ? Qtrue : Qfalse)), + require_result_send_resuce, rb_eException, crr->port); + + RB_GC_GUARD(crr_obj); + return Qnil; +} + +static VALUE +ractor_require_func(void *crr_obj) +{ + return ractor_require_protect((VALUE)crr_obj, require_body); +} + +VALUE +rb_ractor_require(VALUE feature, bool silent) +{ + // We're about to block on the main ractor, so if we're holding the global lock we'll deadlock. + ASSERT_vm_unlocking(); + + struct cross_ractor_require *crr; + VALUE crr_obj = TypedData_Make_Struct(0, struct cross_ractor_require, &cross_ractor_require_data_type, crr); + RB_OBJ_SET_SHAREABLE(crr_obj); // TODO: internal data? + + // Convert feature to proper file path and make it shareable as fstring + RB_OBJ_WRITE(crr_obj, &crr->as.require.feature, rb_fstring(FilePathValue(feature))); + RB_OBJ_WRITE(crr_obj, &crr->port, rb_ractor_make_shareable(ractor_port_new(GET_RACTOR()))); + crr->raised = false; + crr->silent = silent; + + rb_execution_context_t *ec = GET_EC(); + rb_ractor_t *main_r = GET_VM()->ractor.main_ractor; + rb_ractor_interrupt_exec(main_r, ractor_require_func, (void *)crr_obj, rb_interrupt_exec_flag_value_data); + + // wait for require done + VALUE results = ractor_port_receive(ec, crr->port); + ractor_port_close(ec, crr->port); + + VALUE exc = rb_ary_pop(results); + VALUE result = rb_ary_pop(results); + RB_GC_GUARD(crr_obj); + + if (RTEST(exc)) { + rb_exc_raise(result); + } + else { + return result; + } +} + +static VALUE +ractor_require(rb_execution_context_t *ec, VALUE self, VALUE feature) +{ + return rb_ractor_require(feature, false); +} + +static VALUE +autoload_load_body(VALUE crr_obj) +{ + struct cross_ractor_require *crr; + TypedData_Get_Struct(crr_obj, struct cross_ractor_require, &cross_ractor_require_data_type, crr); + return rb_autoload_load(crr->as.autoload.module, crr->as.autoload.name); +} + +static VALUE +ractor_autoload_load_func(void *crr_obj) +{ + return ractor_require_protect((VALUE)crr_obj, autoload_load_body); +} + +VALUE +rb_ractor_autoload_load(VALUE module, ID name) +{ + struct cross_ractor_require *crr; + VALUE crr_obj = TypedData_Make_Struct(0, struct cross_ractor_require, &cross_ractor_require_data_type, crr); + RB_OBJ_SET_SHAREABLE(crr_obj); // TODO: internal data? + + RB_OBJ_WRITE(crr_obj, &crr->as.autoload.module, module); + RB_OBJ_WRITE(crr_obj, &crr->as.autoload.name, name); + RB_OBJ_WRITE(crr_obj, &crr->port, rb_ractor_make_shareable(ractor_port_new(GET_RACTOR()))); + + rb_execution_context_t *ec = GET_EC(); + rb_ractor_t *main_r = GET_VM()->ractor.main_ractor; + rb_ractor_interrupt_exec(main_r, ractor_autoload_load_func, (void *)crr_obj, rb_interrupt_exec_flag_value_data); + + // wait for require done + VALUE results = ractor_port_receive(ec, crr->port); + ractor_port_close(ec, crr->port); + + VALUE exc = rb_ary_pop(results); + VALUE result = rb_ary_pop(results); + RB_GC_GUARD(crr_obj); + + if (RTEST(exc)) { + rb_exc_raise(result); + } + else { + return result; + } +} + +#include "ractor.rbinc" |