diff options
Diffstat (limited to 'thread.c')
-rw-r--r-- | thread.c | 2400 |
1 files changed, 1232 insertions, 1168 deletions
@@ -70,13 +70,15 @@ # include <alloca.h> #endif +#define TH_SCHED(th) (&(th)->ractor->threads.sched) + #include "eval_intern.h" -#include "gc.h" #include "hrtime.h" #include "internal.h" #include "internal/class.h" #include "internal/cont.h" #include "internal/error.h" +#include "internal/gc.h" #include "internal/hash.h" #include "internal/io.h" #include "internal/object.h" @@ -87,7 +89,7 @@ #include "internal/time.h" #include "internal/warnings.h" #include "iseq.h" -#include "mjit.h" +#include "rjit.h" #include "ruby/debug.h" #include "ruby/io.h" #include "ruby/thread.h" @@ -98,27 +100,22 @@ #include "vm_debug.h" #include "vm_sync.h" +#if USE_RJIT && defined(HAVE_SYS_WAIT_H) +#include <sys/wait.h> +#endif + #ifndef USE_NATIVE_THREAD_PRIORITY #define USE_NATIVE_THREAD_PRIORITY 0 #define RUBY_THREAD_PRIORITY_MAX 3 #define RUBY_THREAD_PRIORITY_MIN -3 #endif -#ifndef THREAD_DEBUG -#define THREAD_DEBUG 0 -#endif - static VALUE rb_cThreadShield; static VALUE sym_immediate; static VALUE sym_on_blocking; static VALUE sym_never; -enum SLEEP_FLAGS { - SLEEP_DEADLOCKABLE = 0x1, - SLEEP_SPURIOUS_CHECK = 0x2 -}; - #define THREAD_LOCAL_STORAGE_INITIALISED FL_USER13 #define THREAD_LOCAL_STORAGE_INITIALISED_P(th) RB_FL_TEST_RAW((th), THREAD_LOCAL_STORAGE_INITIALISED) @@ -132,27 +129,33 @@ rb_thread_local_storage(VALUE thread) return rb_ivar_get(thread, idLocals); } -static int sleep_hrtime(rb_thread_t *, rb_hrtime_t, unsigned int fl); +enum SLEEP_FLAGS { + SLEEP_DEADLOCKABLE = 0x01, + SLEEP_SPURIOUS_CHECK = 0x02, + SLEEP_ALLOW_SPURIOUS = 0x04, + SLEEP_NO_CHECKINTS = 0x08, +}; + static void sleep_forever(rb_thread_t *th, unsigned int fl); -static void rb_thread_sleep_deadly_allow_spurious_wakeup(VALUE blocker); +static int sleep_hrtime(rb_thread_t *, rb_hrtime_t, unsigned int fl); + +static void rb_thread_sleep_deadly_allow_spurious_wakeup(VALUE blocker, VALUE timeout, rb_hrtime_t end); static int rb_threadptr_dead(rb_thread_t *th); static void rb_check_deadlock(rb_ractor_t *r); static int rb_threadptr_pending_interrupt_empty_p(const rb_thread_t *th); static const char *thread_status_name(rb_thread_t *th, int detail); static int hrtime_update_expire(rb_hrtime_t *, const rb_hrtime_t); NORETURN(static void async_bug_fd(const char *mesg, int errno_arg, int fd)); -static int consume_communication_pipe(int fd); -static int check_signals_nogvl(rb_thread_t *, int sigwait_fd); -void rb_sigwait_fd_migrate(rb_vm_t *); /* process.c */ +MAYBE_UNUSED(static int consume_communication_pipe(int fd)); -#define eKillSignal INT2FIX(0) -#define eTerminateSignal INT2FIX(1) static volatile int system_working = 1; +static rb_internal_thread_specific_key_t specific_key_count; struct waiting_fd { - struct list_node wfd_node; /* <=> vm.waiting_fds */ + struct ccan_list_node wfd_node; /* <=> vm.waiting_fds */ rb_thread_t *th; int fd; + struct rb_io_close_wait_list *busy; }; /********************************************************************************/ @@ -167,15 +170,16 @@ static int unblock_function_set(rb_thread_t *th, rb_unblock_function_t *func, vo static void unblock_function_clear(rb_thread_t *th); static inline int blocking_region_begin(rb_thread_t *th, struct rb_blocking_region_buffer *region, - rb_unblock_function_t *ubf, void *arg, int fail_if_interrupted); + rb_unblock_function_t *ubf, void *arg, int fail_if_interrupted); static inline void blocking_region_end(rb_thread_t *th, struct rb_blocking_region_buffer *region); -#define GVL_UNLOCK_BEGIN(th) do { \ - RB_GC_SAVE_MACHINE_CONTEXT(th); \ - gvl_release(rb_ractor_gvl(th->ractor)); +#define THREAD_BLOCKING_BEGIN(th) do { \ + struct rb_thread_sched * const sched = TH_SCHED(th); \ + RB_VM_SAVE_MACHINE_CONTEXT(th); \ + thread_sched_to_waiting((sched), (th)); -#define GVL_UNLOCK_END(th) \ - gvl_acquire(rb_ractor_gvl(th->ractor), th); \ +#define THREAD_BLOCKING_END(th) \ + thread_sched_to_running((sched), (th)); \ rb_ractor_thread_switch(th->ractor, th); \ } while(0) @@ -191,10 +195,10 @@ static inline void blocking_region_end(rb_thread_t *th, struct rb_blocking_regio #define BLOCKING_REGION(th, exec, ubf, ubfarg, fail_if_interrupted) do { \ struct rb_blocking_region_buffer __region; \ if (blocking_region_begin(th, &__region, (ubf), (ubfarg), fail_if_interrupted) || \ - /* always return true unless fail_if_interrupted */ \ - !only_if_constant(fail_if_interrupted, TRUE)) { \ - exec; \ - blocking_region_end(th, &__region); \ + /* always return true unless fail_if_interrupted */ \ + !only_if_constant(fail_if_interrupted, TRUE)) { \ + exec; \ + blocking_region_end(th, &__region); \ }; \ } while(0) @@ -209,11 +213,11 @@ vm_check_ints_blocking(rb_execution_context_t *ec) rb_thread_t *th = rb_ec_thread_ptr(ec); if (LIKELY(rb_threadptr_pending_interrupt_empty_p(th))) { - if (LIKELY(!RUBY_VM_INTERRUPTED_ANY(ec))) return FALSE; + if (LIKELY(!RUBY_VM_INTERRUPTED_ANY(ec))) return FALSE; } else { - th->pending_interrupt_queue_checked = 0; - RUBY_VM_SET_INTERRUPT(ec); + th->pending_interrupt_queue_checked = 0; + RUBY_VM_SET_INTERRUPT(ec); } return rb_threadptr_execute_interrupts(th, 1); } @@ -254,123 +258,11 @@ timeout_prepare(rb_hrtime_t **to, rb_hrtime_t *rel, rb_hrtime_t *end, } } -#if THREAD_DEBUG -#ifdef HAVE_VA_ARGS_MACRO -void rb_thread_debug(const char *file, int line, const char *fmt, ...); -#define thread_debug(...) rb_thread_debug(__FILE__, __LINE__, __VA_ARGS__) -#define POSITION_FORMAT "%s:%d:" -#define POSITION_ARGS ,file, line -#else -void rb_thread_debug(const char *fmt, ...); -#define thread_debug rb_thread_debug -#define POSITION_FORMAT -#define POSITION_ARGS -#endif - -# ifdef NON_SCALAR_THREAD_ID -#define fill_thread_id_string ruby_fill_thread_id_string -const char * -ruby_fill_thread_id_string(rb_nativethread_id_t thid, rb_thread_id_string_t buf) -{ - extern const char ruby_digitmap[]; - size_t i; - - buf[0] = '0'; - buf[1] = 'x'; - for (i = 0; i < sizeof(thid); i++) { -# ifdef LITTLE_ENDIAN - size_t j = sizeof(thid) - i - 1; -# else - size_t j = i; -# endif - unsigned char c = (unsigned char)((char *)&thid)[j]; - buf[2 + i * 2] = ruby_digitmap[(c >> 4) & 0xf]; - buf[3 + i * 2] = ruby_digitmap[c & 0xf]; - } - buf[sizeof(rb_thread_id_string_t)-1] = '\0'; - return buf; -} -# define fill_thread_id_str(th) fill_thread_id_string((th)->thread_id, (th)->thread_id_string) -# define thread_id_str(th) ((th)->thread_id_string) -# define PRI_THREAD_ID "s" -# endif - -# if THREAD_DEBUG < 0 -static int rb_thread_debug_enabled; - -/* - * call-seq: - * Thread.DEBUG -> num - * - * Returns the thread debug level. Available only if compiled with - * THREAD_DEBUG=-1. - */ - -static VALUE -rb_thread_s_debug(VALUE _) -{ - return INT2NUM(rb_thread_debug_enabled); -} - -/* - * call-seq: - * Thread.DEBUG = num - * - * Sets the thread debug level. Available only if compiled with - * THREAD_DEBUG=-1. - */ - -static VALUE -rb_thread_s_debug_set(VALUE self, VALUE val) -{ - rb_thread_debug_enabled = RTEST(val) ? NUM2INT(val) : 0; - return val; -} -# else -# define rb_thread_debug_enabled THREAD_DEBUG -# endif -#else -#define thread_debug if(0)printf -#endif - -#ifndef fill_thread_id_str -# define fill_thread_id_string(thid, buf) ((void *)(uintptr_t)(thid)) -# define fill_thread_id_str(th) (void)0 -# define thread_id_str(th) ((void *)(uintptr_t)(th)->thread_id) -# define PRI_THREAD_ID "p" -#endif - -NOINLINE(static int thread_start_func_2(rb_thread_t *th, VALUE *stack_start)); -void ruby_sigchld_handler(rb_vm_t *); /* signal.c */ - -static void -ubf_sigwait(void *ignore) -{ - rb_thread_wakeup_timer_thread(0); -} - -#if defined(_WIN32) -#include "thread_win32.c" - -#define DEBUG_OUT() \ - WaitForSingleObject(&debug_mutex, INFINITE); \ - printf(POSITION_FORMAT"%#lx - %s" POSITION_ARGS, GetCurrentThreadId(), buf); \ - fflush(stdout); \ - ReleaseMutex(&debug_mutex); +MAYBE_UNUSED(NOINLINE(static int thread_start_func_2(rb_thread_t *th, VALUE *stack_start))); +MAYBE_UNUSED(static bool th_has_dedicated_nt(const rb_thread_t *th)); +MAYBE_UNUSED(static int waitfd_to_waiting_flag(int wfd_event)); -#elif defined(HAVE_PTHREAD_H) -#include "thread_pthread.c" - -#define DEBUG_OUT() \ - pthread_mutex_lock(&debug_mutex); \ - printf(POSITION_FORMAT"%"PRI_THREAD_ID" - %s" POSITION_ARGS, \ - fill_thread_id_string(pthread_self(), thread_id_string), buf); \ - fflush(stdout); \ - pthread_mutex_unlock(&debug_mutex); - -#else -#error "unsupported thread type" -#endif +#include THREAD_IMPL_SRC /* * TODO: somebody with win32 knowledge should be able to get rid of @@ -385,48 +277,9 @@ ubf_sigwait(void *ignore) # define USE_EVENTFD (0) #endif -#if THREAD_DEBUG -static int debug_mutex_initialized = 1; -static rb_nativethread_lock_t debug_mutex; - -void -rb_thread_debug( -#ifdef HAVE_VA_ARGS_MACRO - const char *file, int line, -#endif - const char *fmt, ...) -{ - va_list args; - char buf[BUFSIZ]; -#ifdef NON_SCALAR_THREAD_ID - rb_thread_id_string_t thread_id_string; -#endif - - if (!rb_thread_debug_enabled) return; - - if (debug_mutex_initialized == 1) { - debug_mutex_initialized = 0; - rb_native_mutex_initialize(&debug_mutex); - } - - va_start(args, fmt); - vsnprintf(buf, BUFSIZ, fmt, args); - va_end(args); - - DEBUG_OUT(); -} -#endif - #include "thread_sync.c" void -rb_vm_gvl_destroy(rb_global_vm_lock_t *gvl) -{ - gvl_release(gvl); - gvl_destroy(gvl); -} - -void rb_nativethread_lock_initialize(rb_nativethread_lock_t *lock) { rb_native_mutex_initialize(lock); @@ -454,14 +307,14 @@ static int unblock_function_set(rb_thread_t *th, rb_unblock_function_t *func, void *arg, int fail_if_interrupted) { do { - if (fail_if_interrupted) { - if (RUBY_VM_INTERRUPTED_ANY(th->ec)) { - return FALSE; - } - } - else { - RUBY_VM_CHECK_INTS(th->ec); - } + if (fail_if_interrupted) { + if (RUBY_VM_INTERRUPTED_ANY(th->ec)) { + return FALSE; + } + } + else { + RUBY_VM_CHECK_INTS(th->ec); + } rb_native_mutex_lock(&th->interrupt_lock); } while (!th->ec->raised_flag && RUBY_VM_INTERRUPTED_ANY(th->ec) && @@ -487,19 +340,23 @@ unblock_function_clear(rb_thread_t *th) static void rb_threadptr_interrupt_common(rb_thread_t *th, int trap) { + RUBY_DEBUG_LOG("th:%u trap:%d", rb_th_serial(th), trap); + rb_native_mutex_lock(&th->interrupt_lock); + { + if (trap) { + RUBY_VM_SET_TRAP_INTERRUPT(th->ec); + } + else { + RUBY_VM_SET_INTERRUPT(th->ec); + } - if (trap) { - RUBY_VM_SET_TRAP_INTERRUPT(th->ec); - } - else { - RUBY_VM_SET_INTERRUPT(th->ec); - } - if (th->unblock.func != NULL) { - (th->unblock.func)(th->unblock.arg); - } - else { - /* none */ + if (th->unblock.func != NULL) { + (th->unblock.func)(th->unblock.arg); + } + else { + /* none */ + } } rb_native_mutex_unlock(&th->interrupt_lock); } @@ -507,6 +364,7 @@ rb_threadptr_interrupt_common(rb_thread_t *th, int trap) void rb_threadptr_interrupt(rb_thread_t *th) { + RUBY_DEBUG_LOG("th:%u", rb_th_serial(th)); rb_threadptr_interrupt_common(th, 0); } @@ -521,18 +379,18 @@ terminate_all(rb_ractor_t *r, const rb_thread_t *main_thread) { rb_thread_t *th = 0; - list_for_each(&r->threads.set, th, lt_node) { + ccan_list_for_each(&r->threads.set, th, lt_node) { if (th != main_thread) { - thread_debug("terminate_all: begin (thid: %"PRI_THREAD_ID", status: %s)\n", - thread_id_str(th), thread_status_name(th, TRUE)); - rb_threadptr_pending_interrupt_enque(th, eTerminateSignal); - rb_threadptr_interrupt(th); - thread_debug("terminate_all: end (thid: %"PRI_THREAD_ID", status: %s)\n", - thread_id_str(th), thread_status_name(th, TRUE)); - } - else { - thread_debug("terminate_all: main thread (%p)\n", (void *)th); - } + RUBY_DEBUG_LOG("terminate start th:%u status:%s", rb_th_serial(th), thread_status_name(th, TRUE)); + + rb_threadptr_pending_interrupt_enque(th, RUBY_FATAL_THREAD_TERMINATED); + rb_threadptr_interrupt(th); + + RUBY_DEBUG_LOG("terminate done th:%u status:%s", rb_th_serial(th), thread_status_name(th, TRUE)); + } + else { + RUBY_DEBUG_LOG("main thread th:%u", rb_th_serial(th)); + } } } @@ -547,18 +405,19 @@ rb_threadptr_join_list_wakeup(rb_thread_t *thread) rb_thread_t *target_thread = join_list->thread; - if (target_thread->scheduler != Qnil && rb_fiberptr_blocking(join_list->fiber) == 0) { + if (target_thread->scheduler != Qnil && join_list->fiber) { rb_fiber_scheduler_unblock(target_thread->scheduler, target_thread->self, rb_fiberptr_self(join_list->fiber)); } else { rb_threadptr_interrupt(target_thread); switch (target_thread->status) { - case THREAD_STOPPED: - case THREAD_STOPPED_FOREVER: - target_thread->status = THREAD_RUNNABLE; - default: - break; + case THREAD_STOPPED: + case THREAD_STOPPED_FOREVER: + target_thread->status = THREAD_RUNNABLE; + break; + default: + break; } } } @@ -571,7 +430,7 @@ rb_threadptr_unlock_all_locking_mutexes(rb_thread_t *th) rb_mutex_t *mutex = th->keeping_mutexes; th->keeping_mutexes = mutex->next_mutex; - /* rb_warn("mutex #<%p> remains to be locked by terminated thread", (void *)mutexes); */ + // rb_warn("mutex #<%p> was not unlocked by thread #<%p>", (void *)mutex, (void*)th); const char *error_message = rb_mutex_unlock_th(mutex, th, mutex->fiber); if (error_message) rb_bug("invalid keeping_mutexes: %s", error_message); @@ -596,31 +455,32 @@ rb_thread_terminate_all(rb_thread_t *th) EC_PUSH_TAG(ec); if (EC_EXEC_TAG() == TAG_NONE) { retry: - thread_debug("rb_thread_terminate_all (main thread: %p)\n", (void *)th); - terminate_all(cr, th); + RUBY_DEBUG_LOG("th:%u", rb_th_serial(th)); + + terminate_all(cr, th); - while (rb_ractor_living_thread_num(cr) > 1) { + while (rb_ractor_living_thread_num(cr) > 1) { rb_hrtime_t rel = RB_HRTIME_PER_SEC; - /*q - * Thread exiting routine in thread_start_func_2 notify - * me when the last sub-thread exit. - */ - sleeping = 1; - native_sleep(th, &rel); - RUBY_VM_CHECK_INTS_BLOCKING(ec); - sleeping = 0; - } + /*q + * Thread exiting routine in thread_start_func_2 notify + * me when the last sub-thread exit. + */ + sleeping = 1; + native_sleep(th, &rel); + RUBY_VM_CHECK_INTS_BLOCKING(ec); + sleeping = 0; + } } else { - /* - * When caught an exception (e.g. Ctrl+C), let's broadcast - * kill request again to ensure killing all threads even - * if they are blocked on sleep, mutex, etc. - */ - if (sleeping) { - sleeping = 0; - goto retry; - } + /* + * When caught an exception (e.g. Ctrl+C), let's broadcast + * kill request again to ensure killing all threads even + * if they are blocked on sleep, mutex, etc. + */ + if (sleeping) { + sleeping = 0; + goto retry; + } } EC_POP_TAG(); } @@ -651,25 +511,22 @@ thread_cleanup_func(void *th_ptr, int atfork) * Unfortunately, we can't release native threading resource at fork * because libc may have unstable locking state therefore touching * a threading resource may cause a deadlock. - * - * FIXME: Skipping native_mutex_destroy(pthread_mutex_destroy) is safe - * with NPTL, but native_thread_destroy calls pthread_cond_destroy - * which calls free(3), so there is a small memory leak atfork, here. */ - if (atfork) - return; + if (atfork) { + th->nt = NULL; + return; + } rb_native_mutex_destroy(&th->interrupt_lock); - native_thread_destroy(th); } static VALUE rb_threadptr_raise(rb_thread_t *, int, VALUE *); static VALUE rb_thread_to_s(VALUE thread); void -ruby_thread_init_stack(rb_thread_t *th) +ruby_thread_init_stack(rb_thread_t *th, void *local_in_parent_frame) { - native_thread_init_stack(th); + native_thread_init_stack(th, local_in_parent_frame); } const VALUE * @@ -678,10 +535,10 @@ rb_vm_proc_local_ep(VALUE proc) const VALUE *ep = vm_proc_ep(proc); if (ep) { - return rb_vm_ep_local_ep(ep); + return rb_vm_ep_local_ep(ep); } else { - return NULL; + return NULL; } } @@ -725,7 +582,7 @@ thread_do_start_proc(rb_thread_t *th) if (args_len < 8) { /* free proc.args if the length is enough small */ args_ptr = ALLOCA_N(VALUE, args_len); - MEMCPY((VALUE *)args_ptr, RARRAY_CONST_PTR_TRANSIENT(args), VALUE, args_len); + MEMCPY((VALUE *)args_ptr, RARRAY_CONST_PTR(args), VALUE, args_len); th->invoke_arg.proc.args = Qnil; } else { @@ -743,14 +600,12 @@ thread_do_start_proc(rb_thread_t *th) } } -static void +static VALUE thread_do_start(rb_thread_t *th) { native_set_thread_name(th); VALUE result = Qundef; - EXEC_EVENT_HOOK(th->ec, RUBY_EVENT_THREAD_BEGIN, th->self, 0, 0, 0, Qundef); - switch (th->invoke_type) { case thread_invoke_type_proc: result = thread_do_start_proc(th); @@ -769,11 +624,7 @@ thread_do_start(rb_thread_t *th) rb_bug("unreachable"); } - rb_fiber_scheduler_set(Qnil); - - th->value = result; - - EXEC_EVENT_HOOK(th->ec, RUBY_EVENT_THREAD_END, th->self, 0, 0, 0, Qundef); + return result; } void rb_ec_clear_current_thread_trace_func(const rb_execution_context_t *ec); @@ -781,19 +632,12 @@ void rb_ec_clear_current_thread_trace_func(const rb_execution_context_t *ec); static int thread_start_func_2(rb_thread_t *th, VALUE *stack_start) { - STACK_GROW_DIR_DETECTION; + RUBY_DEBUG_LOG("th:%u", rb_th_serial(th)); + VM_ASSERT(th != th->vm->ractor.main_thread); + enum ruby_tag_type state; VALUE errinfo = Qnil; - size_t size = th->vm->default_params.thread_vm_stack_size / sizeof(VALUE); rb_thread_t *ractor_main_th = th->ractor->threads.main; - VALUE * vm_stack = NULL; - - VM_ASSERT(th != th->vm->ractor.main_thread); - thread_debug("thread start: %p\n", (void *)th); - - // setup native thread - gvl_acquire(rb_ractor_gvl(th->ractor), th); - ruby_thread_set_native(th); // setup ractor if (rb_ractor_status_p(th->ractor, ractor_blocking)) { @@ -808,30 +652,39 @@ thread_start_func_2(rb_thread_t *th, VALUE *stack_start) RB_VM_UNLOCK(); } - // This assertion is not passed on win32 env. Check it later. - // VM_ASSERT((size * sizeof(VALUE)) <= th->ec->machine.stack_maxsize); + // Ensure that we are not joinable. + VM_ASSERT(UNDEF_P(th->value)); - // setup VM and machine stack - vm_stack = alloca(size * sizeof(VALUE)); - VM_ASSERT(vm_stack); + int fiber_scheduler_closed = 0, event_thread_end_hooked = 0; + VALUE result = Qundef; - rb_ec_initialize_vm_stack(th->ec, vm_stack, size); - th->ec->machine.stack_start = STACK_DIR_UPPER(vm_stack + size, vm_stack); - th->ec->machine.stack_maxsize -= size * sizeof(VALUE); + EC_PUSH_TAG(th->ec); - thread_debug("thread start (get lock): %p\n", (void *)th); + if ((state = EC_EXEC_TAG()) == TAG_NONE) { + EXEC_EVENT_HOOK(th->ec, RUBY_EVENT_THREAD_BEGIN, th->self, 0, 0, 0, Qundef); - // Ensure that we are not joinable. - VM_ASSERT(th->value == Qundef); + result = thread_do_start(th); + } - EC_PUSH_TAG(th->ec); + if (!fiber_scheduler_closed) { + fiber_scheduler_closed = 1; + rb_fiber_scheduler_set(Qnil); + } - if ((state = EC_EXEC_TAG()) == TAG_NONE) { - SAVE_ROOT_JMPBUF(th, thread_do_start(th)); + if (!event_thread_end_hooked) { + event_thread_end_hooked = 1; + EXEC_EVENT_HOOK(th->ec, RUBY_EVENT_THREAD_END, th->self, 0, 0, 0, Qundef); } - else { + + if (state == TAG_NONE) { + // This must be set AFTER doing all user-level code. At this point, the thread is effectively finished and calls to `Thread#join` will succeed. + th->value = result; + } else { errinfo = th->ec->errinfo; + VALUE exc = rb_vm_make_jump_tag_but_local_jump(state, Qundef); + if (!NIL_P(exc)) errinfo = exc; + if (state == TAG_FATAL) { if (th->invoke_type == thread_invoke_type_ractor_proc) { rb_ractor_atexit(th->ec, Qnil); @@ -865,7 +718,7 @@ thread_start_func_2(rb_thread_t *th, VALUE *stack_start) } // The thread is effectively finished and can be joined. - VM_ASSERT(th->value != Qundef); + VM_ASSERT(!UNDEF_P(th->value)); rb_threadptr_join_list_wakeup(th); rb_threadptr_unlock_all_locking_mutexes(th); @@ -876,7 +729,7 @@ thread_start_func_2(rb_thread_t *th, VALUE *stack_start) } th->status = THREAD_KILLED; - thread_debug("thread end: %p\n", (void *)th); + RUBY_DEBUG_LOG("killed th:%u", rb_th_serial(th)); if (th->vm->ractor.main_thread == th) { ruby_stop(0); @@ -914,12 +767,12 @@ thread_start_func_2(rb_thread_t *th, VALUE *stack_start) // after rb_ractor_living_threads_remove() // GC will happen anytime and this ractor can be collected (and destroy GVL). // So gvl_release() should be before it. - gvl_release(rb_ractor_gvl(th->ractor)); + thread_sched_to_dead(TH_SCHED(th), th); rb_ractor_living_threads_remove(th->ractor, th); } else { rb_ractor_living_threads_remove(th->ractor, th); - gvl_release(rb_ractor_gvl(th->ractor)); + thread_sched_to_dead(TH_SCHED(th), th); } return 0; @@ -939,6 +792,8 @@ struct thread_create_params { VALUE (*fn)(void *); }; +static void thread_specific_storage_alloc(rb_thread_t *th); + static VALUE thread_create_core(VALUE thval, struct thread_create_params *params) { @@ -946,11 +801,15 @@ thread_create_core(VALUE thval, struct thread_create_params *params) rb_thread_t *th = rb_thread_ptr(thval), *current_th = rb_ec_thread_ptr(ec); int err; + thread_specific_storage_alloc(th); + if (OBJ_FROZEN(current_th->thgroup)) { - rb_raise(rb_eThreadError, - "can't start a new thread (frozen ThreadGroup)"); + rb_raise(rb_eThreadError, + "can't start a new thread (frozen ThreadGroup)"); } + rb_fiber_inherit_storage(ec, th->ec->fiber_ptr); + switch (params->type) { case thread_invoke_type_proc: th->invoke_type = thread_invoke_type_proc; @@ -985,21 +844,21 @@ thread_create_core(VALUE thval, struct thread_create_params *params) th->priority = current_th->priority; th->thgroup = current_th->thgroup; - th->pending_interrupt_queue = rb_ary_tmp_new(0); + th->pending_interrupt_queue = rb_ary_hidden_new(0); th->pending_interrupt_queue_checked = 0; th->pending_interrupt_mask_stack = rb_ary_dup(current_th->pending_interrupt_mask_stack); RBASIC_CLEAR_CLASS(th->pending_interrupt_mask_stack); rb_native_mutex_initialize(&th->interrupt_lock); - RUBY_DEBUG_LOG("r:%u th:%p", rb_ractor_id(th->ractor), th); + RUBY_DEBUG_LOG("r:%u th:%u", rb_ractor_id(th->ractor), rb_th_serial(th)); rb_ractor_living_threads_insert(th->ractor, th); /* kick thread */ err = native_thread_create(th); if (err) { - th->status = THREAD_KILLED; + th->status = THREAD_KILLED; rb_ractor_living_threads_remove(th->ractor, th); rb_raise(rb_eThreadError, "can't create Thread: %s", strerror(err)); } @@ -1041,8 +900,8 @@ thread_s_new(int argc, VALUE *argv, VALUE klass) rb_obj_call_init_kw(thread, argc, argv, RB_PASS_CALLED_KEYWORDS); th = rb_thread_ptr(thread); if (!threadptr_initialized(th)) { - rb_raise(rb_eThreadError, "uninitialized thread - check `%"PRIsVALUE"#initialize'", - klass); + rb_raise(rb_eThreadError, "uninitialized thread - check '%"PRIsVALUE"#initialize'", + klass); } return thread; } @@ -1121,11 +980,11 @@ rb_thread_create(VALUE (*fn)(void *), void *arg) } VALUE -rb_thread_create_ractor(rb_ractor_t *g, VALUE args, VALUE proc) +rb_thread_create_ractor(rb_ractor_t *r, VALUE args, VALUE proc) { struct thread_create_params params = { .type = thread_invoke_type_ractor_proc, - .g = g, + .g = r, .args = args, .proc = proc, }; @@ -1137,6 +996,7 @@ struct join_arg { struct rb_waiting_list *waiter; rb_thread_t *target; VALUE timeout; + rb_hrtime_t *limit; }; static VALUE @@ -1161,12 +1021,10 @@ remove_from_join_list(VALUE arg) return Qnil; } -static rb_hrtime_t *double2hrtime(rb_hrtime_t *, double); - static int thread_finished(rb_thread_t *th) { - return th->status == THREAD_KILLED || th->value != Qundef; + return th->status == THREAD_KILLED || !UNDEF_P(th->value); } static VALUE @@ -1174,22 +1032,7 @@ thread_join_sleep(VALUE arg) { struct join_arg *p = (struct join_arg *)arg; rb_thread_t *target_th = p->target, *th = p->waiter->thread; - rb_hrtime_t end = 0, rel = 0, *limit = 0; - - /* - * This supports INFINITY and negative values, so we can't use - * rb_time_interval right now... - */ - if (p->timeout == Qnil) { - /* unlimited */ - } - else if (FIXNUM_P(p->timeout)) { - rel = rb_sec2hrtime(NUM2TIMET(p->timeout)); - limit = &rel; - } - else { - limit = double2hrtime(&rel, rb_num2dbl(p->timeout)); - } + rb_hrtime_t end = 0, *limit = p->limit; if (limit) { end = rb_hrtime_add(*limit, rb_hrtime_now()); @@ -1200,18 +1043,17 @@ thread_join_sleep(VALUE arg) if (scheduler != Qnil) { rb_fiber_scheduler_block(scheduler, target_th->self, p->timeout); + // Check if the target thread is finished after blocking: + if (thread_finished(target_th)) break; + // Otherwise, a timeout occurred: + else return Qfalse; } else if (!limit) { - th->status = THREAD_STOPPED_FOREVER; - rb_ractor_sleeper_threads_inc(th->ractor); - rb_check_deadlock(th->ractor); - native_sleep(th, 0); - rb_ractor_sleeper_threads_dec(th->ractor); + sleep_forever(th, SLEEP_DEADLOCKABLE | SLEEP_ALLOW_SPURIOUS | SLEEP_NO_CHECKINTS); } else { if (hrtime_update_expire(limit, end)) { - thread_debug("thread_join: timeout (thid: %"PRI_THREAD_ID")\n", - thread_id_str(target_th)); + RUBY_DEBUG_LOG("timeout target_th:%u", rb_th_serial(target_th)); return Qfalse; } th->status = THREAD_STOPPED; @@ -1219,14 +1061,15 @@ thread_join_sleep(VALUE arg) } RUBY_VM_CHECK_INTS_BLOCKING(th->ec); th->status = THREAD_RUNNABLE; - thread_debug("thread_join: interrupted (thid: %"PRI_THREAD_ID", status: %s)\n", - thread_id_str(target_th), thread_status_name(target_th, TRUE)); + + RUBY_DEBUG_LOG("interrupted target_th:%u status:%s", rb_th_serial(target_th), thread_status_name(target_th, TRUE)); } + return Qtrue; } static VALUE -thread_join(rb_thread_t *target_th, VALUE timeout) +thread_join(rb_thread_t *target_th, VALUE timeout, rb_hrtime_t *limit) { rb_execution_context_t *ec = GET_EC(); rb_thread_t *th = ec->thread_ptr; @@ -1240,28 +1083,27 @@ thread_join(rb_thread_t *target_th, VALUE timeout) rb_raise(rb_eThreadError, "Target thread must not be main thread"); } - thread_debug("thread_join (thid: %"PRI_THREAD_ID", status: %s)\n", - thread_id_str(target_th), thread_status_name(target_th, TRUE)); + RUBY_DEBUG_LOG("target_th:%u status:%s", rb_th_serial(target_th), thread_status_name(target_th, TRUE)); if (target_th->status != THREAD_KILLED) { struct rb_waiting_list waiter; waiter.next = target_th->join_list; waiter.thread = th; - waiter.fiber = fiber; + waiter.fiber = rb_fiberptr_blocking(fiber) ? NULL : fiber; target_th->join_list = &waiter; struct join_arg arg; arg.waiter = &waiter; arg.target = target_th; arg.timeout = timeout; + arg.limit = limit; if (!rb_ensure(thread_join_sleep, (VALUE)&arg, remove_from_join_list, (VALUE)&arg)) { return Qnil; } } - thread_debug("thread_join: success (thid: %"PRI_THREAD_ID", status: %s)\n", - thread_id_str(target_th), thread_status_name(target_th, TRUE)); + RUBY_DEBUG_LOG("success target_th:%u status:%s", rb_th_serial(target_th), thread_status_name(target_th, TRUE)); if (target_th->ec->errinfo != Qnil) { VALUE err = target_th->ec->errinfo; @@ -1269,8 +1111,7 @@ thread_join(rb_thread_t *target_th, VALUE timeout) if (FIXNUM_P(err)) { switch (err) { case INT2FIX(TAG_FATAL): - thread_debug("thread_join: terminated (thid: %"PRI_THREAD_ID", status: %s)\n", - thread_id_str(target_th), thread_status_name(target_th, TRUE)); + RUBY_DEBUG_LOG("terminated target_th:%u status:%s", rb_th_serial(target_th), thread_status_name(target_th, TRUE)); /* OK. killed. */ break; @@ -1332,23 +1173,29 @@ static VALUE thread_join_m(int argc, VALUE *argv, VALUE self) { VALUE timeout = Qnil; + rb_hrtime_t rel = 0, *limit = 0; if (rb_check_arity(argc, 0, 1)) { timeout = argv[0]; } // Convert the timeout eagerly, so it's always converted and deterministic - if (timeout == Qnil) { + /* + * This supports INFINITY and negative values, so we can't use + * rb_time_interval right now... + */ + if (NIL_P(timeout)) { /* unlimited */ } else if (FIXNUM_P(timeout)) { - /* handled directly in thread_join_sleep() */ + rel = rb_sec2hrtime(NUM2TIMET(timeout)); + limit = &rel; } else { - timeout = rb_to_float(timeout); + limit = double2hrtime(&rel, rb_num2dbl(timeout)); } - return thread_join(rb_thread_ptr(self), timeout); + return thread_join(rb_thread_ptr(self), timeout, limit); } /* @@ -1369,7 +1216,11 @@ static VALUE thread_value(VALUE self) { rb_thread_t *th = rb_thread_ptr(self); - thread_join(th, Qnil); + thread_join(th, Qnil, 0); + if (UNDEF_P(th->value)) { + // If the thread is dead because we forked th->value is still Qundef. + return Qnil; + } return th->value; } @@ -1377,44 +1228,6 @@ thread_value(VALUE self) * Thread Scheduling */ -/* - * Back when we used "struct timeval", not all platforms implemented - * tv_sec as time_t. Nowadays we use "struct timespec" and tv_sec - * seems to be implemented more consistently across platforms. - * At least other parts of our code hasn't had to deal with non-time_t - * tv_sec in timespec... - */ -#define TIMESPEC_SEC_MAX TIMET_MAX -#define TIMESPEC_SEC_MIN TIMET_MIN - -COMPILER_WARNING_PUSH -#if __has_warning("-Wimplicit-int-float-conversion") -COMPILER_WARNING_IGNORED(-Wimplicit-int-float-conversion) -#elif defined(_MSC_VER) -/* C4305: 'initializing': truncation from '__int64' to 'const double' */ -COMPILER_WARNING_IGNORED(4305) -#endif -static const double TIMESPEC_SEC_MAX_as_double = TIMESPEC_SEC_MAX; -COMPILER_WARNING_POP - -static rb_hrtime_t * -double2hrtime(rb_hrtime_t *hrt, double d) -{ - /* assume timespec.tv_sec has same signedness as time_t */ - const double TIMESPEC_SEC_MAX_PLUS_ONE = 2.0 * (TIMESPEC_SEC_MAX_as_double / 2.0 + 1.0); - - if (TIMESPEC_SEC_MAX_PLUS_ONE <= d) { - return NULL; - } - else if (d <= 0) { - *hrt = 0; - } - else { - *hrt = (rb_hrtime_t)(d * (double)RB_HRTIME_PER_SEC); - } - return hrt; -} - static void getclockofday(struct timespec *ts) { @@ -1439,32 +1252,6 @@ rb_hrtime_now(void) return rb_timespec2hrtime(&ts); } -static void -sleep_forever(rb_thread_t *th, unsigned int fl) -{ - enum rb_thread_status prev_status = th->status; - enum rb_thread_status status; - int woke; - - status = fl & SLEEP_DEADLOCKABLE ? THREAD_STOPPED_FOREVER : THREAD_STOPPED; - th->status = status; - RUBY_VM_CHECK_INTS_BLOCKING(th->ec); - while (th->status == status) { - if (fl & SLEEP_DEADLOCKABLE) { - rb_ractor_sleeper_threads_inc(th->ractor); - rb_check_deadlock(th->ractor); - } - native_sleep(th, 0); - if (fl & SLEEP_DEADLOCKABLE) { - rb_ractor_sleeper_threads_dec(th->ractor); - } - woke = vm_check_ints_blocking(th->ec); - if (woke && !(fl & SLEEP_SPURIOUS_CHECK)) - break; - } - th->status = prev_status; -} - /* * at least gcc 7.2 and 7.3 complains about "rb_hrtime_t end" * being uninitialized, maybe other versions, too. @@ -1487,9 +1274,9 @@ hrtime_update_expire(rb_hrtime_t *timeout, const rb_hrtime_t end) rb_hrtime_t now = rb_hrtime_now(); if (now > end) return 1; - thread_debug("hrtime_update_expire: " - "%"PRIu64" > %"PRIu64"\n", - (uint64_t)end, (uint64_t)now); + + RUBY_DEBUG_LOG("%"PRIu64" > %"PRIu64"", (uint64_t)end, (uint64_t)now); + *timeout = end - now; return 0; } @@ -1505,54 +1292,105 @@ sleep_hrtime(rb_thread_t *th, rb_hrtime_t rel, unsigned int fl) th->status = THREAD_STOPPED; RUBY_VM_CHECK_INTS_BLOCKING(th->ec); while (th->status == THREAD_STOPPED) { - native_sleep(th, &rel); - woke = vm_check_ints_blocking(th->ec); - if (woke && !(fl & SLEEP_SPURIOUS_CHECK)) - break; - if (hrtime_update_expire(&rel, end)) - break; + native_sleep(th, &rel); + woke = vm_check_ints_blocking(th->ec); + if (woke && !(fl & SLEEP_SPURIOUS_CHECK)) + break; + if (hrtime_update_expire(&rel, end)) + break; + woke = 1; + } + th->status = prev_status; + return woke; +} + +static int +sleep_hrtime_until(rb_thread_t *th, rb_hrtime_t end, unsigned int fl) +{ + enum rb_thread_status prev_status = th->status; + int woke; + rb_hrtime_t rel = rb_hrtime_sub(end, rb_hrtime_now()); + + th->status = THREAD_STOPPED; + RUBY_VM_CHECK_INTS_BLOCKING(th->ec); + while (th->status == THREAD_STOPPED) { + native_sleep(th, &rel); + woke = vm_check_ints_blocking(th->ec); + if (woke && !(fl & SLEEP_SPURIOUS_CHECK)) + break; + if (hrtime_update_expire(&rel, end)) + break; woke = 1; } th->status = prev_status; return woke; } +static void +sleep_forever(rb_thread_t *th, unsigned int fl) +{ + enum rb_thread_status prev_status = th->status; + enum rb_thread_status status; + int woke; + + status = fl & SLEEP_DEADLOCKABLE ? THREAD_STOPPED_FOREVER : THREAD_STOPPED; + th->status = status; + + if (!(fl & SLEEP_NO_CHECKINTS)) RUBY_VM_CHECK_INTS_BLOCKING(th->ec); + + while (th->status == status) { + if (fl & SLEEP_DEADLOCKABLE) { + rb_ractor_sleeper_threads_inc(th->ractor); + rb_check_deadlock(th->ractor); + } + { + native_sleep(th, 0); + } + if (fl & SLEEP_DEADLOCKABLE) { + rb_ractor_sleeper_threads_dec(th->ractor); + } + if (fl & SLEEP_ALLOW_SPURIOUS) { + break; + } + + woke = vm_check_ints_blocking(th->ec); + + if (woke && !(fl & SLEEP_SPURIOUS_CHECK)) { + break; + } + } + th->status = prev_status; +} + void rb_thread_sleep_forever(void) { - thread_debug("rb_thread_sleep_forever\n"); + RUBY_DEBUG_LOG("forever"); sleep_forever(GET_THREAD(), SLEEP_SPURIOUS_CHECK); } void rb_thread_sleep_deadly(void) { - thread_debug("rb_thread_sleep_deadly\n"); + RUBY_DEBUG_LOG("deadly"); sleep_forever(GET_THREAD(), SLEEP_DEADLOCKABLE|SLEEP_SPURIOUS_CHECK); } -void -rb_thread_sleep_interruptible(void) -{ - rb_thread_t *th = GET_THREAD(); - enum rb_thread_status prev_status = th->status; - - th->status = THREAD_STOPPED; - native_sleep(th, 0); - RUBY_VM_CHECK_INTS_BLOCKING(th->ec); - th->status = prev_status; -} - static void -rb_thread_sleep_deadly_allow_spurious_wakeup(VALUE blocker) +rb_thread_sleep_deadly_allow_spurious_wakeup(VALUE blocker, VALUE timeout, rb_hrtime_t end) { VALUE scheduler = rb_fiber_scheduler_current(); if (scheduler != Qnil) { - rb_fiber_scheduler_block(scheduler, blocker, Qnil); + rb_fiber_scheduler_block(scheduler, blocker, timeout); } else { - thread_debug("rb_thread_sleep_deadly_allow_spurious_wakeup\n"); - sleep_forever(GET_THREAD(), SLEEP_DEADLOCKABLE); + RUBY_DEBUG_LOG("..."); + if (end) { + sleep_hrtime_until(GET_THREAD(), end, SLEEP_SPURIOUS_CHECK); + } + else { + sleep_forever(GET_THREAD(), SLEEP_DEADLOCKABLE); + } } } @@ -1603,17 +1441,19 @@ rb_thread_sleep(int sec) static void rb_thread_schedule_limits(uint32_t limits_us) { - thread_debug("rb_thread_schedule\n"); if (!rb_thread_alone()) { - rb_thread_t *th = GET_THREAD(); + rb_thread_t *th = GET_THREAD(); + RUBY_DEBUG_LOG("us:%u", (unsigned int)limits_us); - if (th->running_time_us >= limits_us) { - thread_debug("rb_thread_schedule/switch start\n"); - RB_GC_SAVE_MACHINE_CONTEXT(th); - gvl_yield(rb_ractor_gvl(th->ractor), th); + if (th->running_time_us >= limits_us) { + RUBY_DEBUG_LOG("switch %s", "start"); + + RB_VM_SAVE_MACHINE_CONTEXT(th); + thread_sched_yield(TH_SCHED(th), th); rb_ractor_thread_switch(th->ractor, th); - thread_debug("rb_thread_schedule/switch done\n"); - } + + RUBY_DEBUG_LOG("switch %s", "done"); + } } } @@ -1628,20 +1468,27 @@ rb_thread_schedule(void) static inline int blocking_region_begin(rb_thread_t *th, struct rb_blocking_region_buffer *region, - rb_unblock_function_t *ubf, void *arg, int fail_if_interrupted) + rb_unblock_function_t *ubf, void *arg, int fail_if_interrupted) { +#ifdef RUBY_VM_CRITICAL_SECTION + VM_ASSERT(ruby_assert_critical_section_entered == 0); +#endif + VM_ASSERT(th == GET_THREAD()); + region->prev_status = th->status; if (unblock_function_set(th, ubf, arg, fail_if_interrupted)) { - th->blocking_region_buffer = region; - th->status = THREAD_STOPPED; + th->blocking_region_buffer = region; + th->status = THREAD_STOPPED; rb_ractor_blocking_threads_inc(th->ractor, __FILE__, __LINE__); - thread_debug("enter blocking region (%p)\n", (void *)th); - RB_GC_SAVE_MACHINE_CONTEXT(th); - gvl_release(rb_ractor_gvl(th->ractor)); - return TRUE; + + RUBY_DEBUG_LOG("thread_id:%p", (void *)th->nt->thread_id); + + RB_VM_SAVE_MACHINE_CONTEXT(th); + thread_sched_to_waiting(TH_SCHED(th), th); + return TRUE; } else { - return FALSE; + return FALSE; } } @@ -1653,15 +1500,21 @@ blocking_region_end(rb_thread_t *th, struct rb_blocking_region_buffer *region) /* entry to ubf_list impossible at this point, so unregister is safe: */ unregister_ubf_list(th); - gvl_acquire(rb_ractor_gvl(th->ractor), th); + thread_sched_to_running(TH_SCHED(th), th); rb_ractor_thread_switch(th->ractor, th); - thread_debug("leave blocking region (%p)\n", (void *)th); th->blocking_region_buffer = 0; rb_ractor_blocking_threads_dec(th->ractor, __FILE__, __LINE__); if (th->status == THREAD_STOPPED) { - th->status = region->prev_status; + th->status = region->prev_status; } + + RUBY_DEBUG_LOG("end"); + +#ifndef _WIN32 + // GET_THREAD() clears WSAGetLastError() + VM_ASSERT(th == GET_THREAD()); +#endif } void * @@ -1677,35 +1530,32 @@ rb_nogvl(void *(*func)(void *), void *data1, int saved_errno = 0; VALUE ubf_th = Qfalse; - if (ubf == RUBY_UBF_IO || ubf == RUBY_UBF_PROCESS) { - ubf = ubf_select; - data2 = th; + if ((ubf == RUBY_UBF_IO) || (ubf == RUBY_UBF_PROCESS)) { + ubf = ubf_select; + data2 = th; } else if (ubf && rb_ractor_living_thread_num(th->ractor) == 1 && is_main_thread) { if (flags & RB_NOGVL_UBF_ASYNC_SAFE) { vm->ubf_async_safe = 1; } - else { - ubf_th = rb_thread_start_unblock_thread(); - } } BLOCKING_REGION(th, { - val = func(data1); - saved_errno = errno; + val = func(data1); + saved_errno = rb_errno(); }, ubf, data2, flags & RB_NOGVL_INTR_FAIL); if (is_main_thread) vm->ubf_async_safe = 0; if ((flags & RB_NOGVL_INTR_FAIL) == 0) { - RUBY_VM_CHECK_INTS_BLOCKING(ec); + RUBY_VM_CHECK_INTS_BLOCKING(ec); } if (ubf_th != Qfalse) { thread_value(rb_thread_kill(ubf_th)); } - errno = saved_errno; + rb_errno_set(saved_errno); return val; } @@ -1797,55 +1647,170 @@ rb_nogvl(void *(*func)(void *), void *data1, */ void * rb_thread_call_without_gvl2(void *(*func)(void *), void *data1, - rb_unblock_function_t *ubf, void *data2) + rb_unblock_function_t *ubf, void *data2) { return rb_nogvl(func, data1, ubf, data2, RB_NOGVL_INTR_FAIL); } void * rb_thread_call_without_gvl(void *(*func)(void *data), void *data1, - rb_unblock_function_t *ubf, void *data2) + rb_unblock_function_t *ubf, void *data2) { return rb_nogvl(func, data1, ubf, data2, 0); } -VALUE -rb_thread_io_blocking_region(rb_blocking_function_t *func, void *data1, int fd) +static int +waitfd_to_waiting_flag(int wfd_event) { - volatile VALUE val = Qundef; /* shouldn't be used */ - rb_execution_context_t * volatile ec = GET_EC(); - volatile int saved_errno = 0; - enum ruby_tag_type state; + return wfd_event << 1; +} - struct waiting_fd waiting_fd = { - .fd = fd, - .th = rb_ec_thread_ptr(ec) - }; +static void +thread_io_setup_wfd(rb_thread_t *th, int fd, struct waiting_fd *wfd) +{ + wfd->fd = fd; + wfd->th = th; + wfd->busy = NULL; RB_VM_LOCK_ENTER(); { - list_add(&rb_ec_vm_ptr(ec)->waiting_fds, &waiting_fd.wfd_node); + ccan_list_add(&th->vm->waiting_fds, &wfd->wfd_node); } RB_VM_LOCK_LEAVE(); +} - EC_PUSH_TAG(ec); - if ((state = EC_EXEC_TAG()) == TAG_NONE) { - BLOCKING_REGION(waiting_fd.th, { - val = func(data1); - saved_errno = errno; - }, ubf_select, waiting_fd.th, FALSE); +static void +thread_io_wake_pending_closer(struct waiting_fd *wfd) +{ + bool has_waiter = wfd->busy && RB_TEST(wfd->busy->wakeup_mutex); + if (has_waiter) { + rb_mutex_lock(wfd->busy->wakeup_mutex); } - EC_POP_TAG(); - /* - * must be deleted before jump - * this will delete either from waiting_fds or on-stack LIST_HEAD(busy) - */ + /* Needs to be protected with RB_VM_LOCK because we don't know if + wfd is on the global list of pending FD ops or if it's on a + struct rb_io_close_wait_list close-waiter. */ RB_VM_LOCK_ENTER(); + ccan_list_del(&wfd->wfd_node); + RB_VM_LOCK_LEAVE(); + + if (has_waiter) { + rb_thread_wakeup(wfd->busy->closing_thread); + rb_mutex_unlock(wfd->busy->wakeup_mutex); + } +} + +static bool +thread_io_mn_schedulable(rb_thread_t *th, int events, const struct timeval *timeout) +{ +#if defined(USE_MN_THREADS) && USE_MN_THREADS + return !th_has_dedicated_nt(th) && (events || timeout) && th->blocking; +#else + return false; +#endif +} + +// true if need retry +static bool +thread_io_wait_events(rb_thread_t *th, int fd, int events, const struct timeval *timeout) +{ +#if defined(USE_MN_THREADS) && USE_MN_THREADS + if (thread_io_mn_schedulable(th, events, timeout)) { + rb_hrtime_t rel, *prel; + + if (timeout) { + rel = rb_timeval2hrtime(timeout); + prel = &rel; + } + else { + prel = NULL; + } + + VM_ASSERT(prel || (events & (RB_WAITFD_IN | RB_WAITFD_OUT))); + + if (thread_sched_wait_events(TH_SCHED(th), th, fd, waitfd_to_waiting_flag(events), prel)) { + // timeout + return false; + } + else { + return true; + } + } +#endif // defined(USE_MN_THREADS) && USE_MN_THREADS + return false; +} + +// assume read/write +static bool +blocking_call_retryable_p(int r, int eno) +{ + if (r != -1) return false; + + switch (eno) { + case EAGAIN: +#if defined(EWOULDBLOCK) && EWOULDBLOCK != EAGAIN + case EWOULDBLOCK: +#endif + return true; + default: + return false; + } +} + +bool +rb_thread_mn_schedulable(VALUE thval) +{ + rb_thread_t *th = rb_thread_ptr(thval); + return th->mn_schedulable; +} + +VALUE +rb_thread_io_blocking_call(rb_blocking_function_t *func, void *data1, int fd, int events) +{ + rb_execution_context_t * volatile ec = GET_EC(); + rb_thread_t *th = rb_ec_thread_ptr(ec); + + RUBY_DEBUG_LOG("th:%u fd:%d ev:%d", rb_th_serial(th), fd, events); + + struct waiting_fd waiting_fd; + volatile VALUE val = Qundef; /* shouldn't be used */ + volatile int saved_errno = 0; + enum ruby_tag_type state; + bool prev_mn_schedulable = th->mn_schedulable; + th->mn_schedulable = thread_io_mn_schedulable(th, events, NULL); + + // `errno` is only valid when there is an actual error - but we can't + // extract that from the return value of `func` alone, so we clear any + // prior `errno` value here so that we can later check if it was set by + // `func` or not (as opposed to some previously set value). + errno = 0; + + thread_io_setup_wfd(th, fd, &waiting_fd); { - list_del(&waiting_fd.wfd_node); + EC_PUSH_TAG(ec); + if ((state = EC_EXEC_TAG()) == TAG_NONE) { + retry: + BLOCKING_REGION(waiting_fd.th, { + val = func(data1); + saved_errno = errno; + }, ubf_select, waiting_fd.th, FALSE); + + if (events && + blocking_call_retryable_p((int)val, saved_errno) && + thread_io_wait_events(th, fd, events, NULL)) { + RUBY_VM_CHECK_INTS_BLOCKING(ec); + goto retry; + } + } + EC_POP_TAG(); + + th->mn_schedulable = prev_mn_schedulable; } - RB_VM_LOCK_LEAVE(); + /* + * must be deleted before jump + * this will delete either from waiting_fds or on-stack struct rb_io_close_wait_list + */ + thread_io_wake_pending_closer(&waiting_fd); if (state) { EC_JUMP_TAG(ec, state); @@ -1853,11 +1818,22 @@ rb_thread_io_blocking_region(rb_blocking_function_t *func, void *data1, int fd) /* TODO: check func() */ RUBY_VM_CHECK_INTS_BLOCKING(ec); + // If the error was a timeout, we raise a specific exception for that: + if (saved_errno == ETIMEDOUT) { + rb_raise(rb_eIOTimeoutError, "Blocking operation timed out!"); + } + errno = saved_errno; return val; } +VALUE +rb_thread_io_blocking_region(rb_blocking_function_t *func, void *data1, int fd) +{ + return rb_thread_io_blocking_call(func, data1, fd, 0); +} + /* * rb_thread_call_with_gvl - re-enter the Ruby world after GVL release. * @@ -1895,20 +1871,20 @@ rb_thread_call_with_gvl(void *(*func)(void *), void *data1) void *r; if (th == 0) { - /* Error has occurred, but we can't use rb_bug() - * because this thread is not Ruby's thread. + /* Error has occurred, but we can't use rb_bug() + * because this thread is not Ruby's thread. * What should we do? - */ + */ bp(); - fprintf(stderr, "[BUG] rb_thread_call_with_gvl() is called by non-ruby thread\n"); - exit(EXIT_FAILURE); + fprintf(stderr, "[BUG] rb_thread_call_with_gvl() is called by non-ruby thread\n"); + exit(EXIT_FAILURE); } brb = (struct rb_blocking_region_buffer *)th->blocking_region_buffer; prev_unblock = th->unblock; if (brb == 0) { - rb_bug("rb_thread_call_with_gvl: called by a thread which has GVL."); + rb_bug("rb_thread_call_with_gvl: called by a thread which has GVL."); } blocking_region_end(th, brb); @@ -1935,10 +1911,10 @@ ruby_thread_has_gvl_p(void) rb_thread_t *th = ruby_thread_from_native(); if (th && th->blocking_region_buffer == 0) { - return 1; + return 1; } else { - return 0; + return 0; } } @@ -1992,7 +1968,7 @@ static void threadptr_check_pending_interrupt_queue(rb_thread_t *th) { if (!th->pending_interrupt_queue) { - rb_raise(rb_eThreadError, "uninitialized thread"); + rb_raise(rb_eThreadError, "uninitialized thread"); } } @@ -2004,6 +1980,23 @@ enum handle_interrupt_timing { }; static enum handle_interrupt_timing +rb_threadptr_pending_interrupt_from_symbol(rb_thread_t *th, VALUE sym) +{ + if (sym == sym_immediate) { + return INTERRUPT_IMMEDIATE; + } + else if (sym == sym_on_blocking) { + return INTERRUPT_ON_BLOCKING; + } + else if (sym == sym_never) { + return INTERRUPT_NEVER; + } + else { + rb_raise(rb_eThreadError, "unknown mask signature"); + } +} + +static enum handle_interrupt_timing rb_threadptr_pending_interrupt_check_mask(rb_thread_t *th, VALUE err) { VALUE mask; @@ -2013,35 +2006,34 @@ rb_threadptr_pending_interrupt_check_mask(rb_thread_t *th, VALUE err) long i; for (i=0; i<mask_stack_len; i++) { - mask = mask_stack[mask_stack_len-(i+1)]; - - for (mod = err; mod; mod = RCLASS_SUPER(mod)) { - VALUE klass = mod; - VALUE sym; - - if (BUILTIN_TYPE(mod) == T_ICLASS) { - klass = RBASIC(mod)->klass; - } - else if (mod != RCLASS_ORIGIN(mod)) { - continue; - } - - if ((sym = rb_hash_aref(mask, klass)) != Qnil) { - if (sym == sym_immediate) { - return INTERRUPT_IMMEDIATE; - } - else if (sym == sym_on_blocking) { - return INTERRUPT_ON_BLOCKING; - } - else if (sym == sym_never) { - return INTERRUPT_NEVER; - } - else { - rb_raise(rb_eThreadError, "unknown mask signature"); - } - } - } - /* try to next mask */ + mask = mask_stack[mask_stack_len-(i+1)]; + + if (SYMBOL_P(mask)) { + /* do not match RUBY_FATAL_THREAD_KILLED etc */ + if (err != rb_cInteger) { + return rb_threadptr_pending_interrupt_from_symbol(th, mask); + } + else { + continue; + } + } + + for (mod = err; mod; mod = RCLASS_SUPER(mod)) { + VALUE klass = mod; + VALUE sym; + + if (BUILTIN_TYPE(mod) == T_ICLASS) { + klass = RBASIC(mod)->klass; + } + else if (mod != RCLASS_ORIGIN(mod)) { + continue; + } + + if ((sym = rb_hash_aref(mask, klass)) != Qnil) { + return rb_threadptr_pending_interrupt_from_symbol(th, sym); + } + } + /* try to next mask */ } return INTERRUPT_NONE; } @@ -2057,10 +2049,10 @@ rb_threadptr_pending_interrupt_include_p(rb_thread_t *th, VALUE err) { int i; for (i=0; i<RARRAY_LEN(th->pending_interrupt_queue); i++) { - VALUE e = RARRAY_AREF(th->pending_interrupt_queue, i); - if (rb_class_inherited_p(e, err)) { - return TRUE; - } + VALUE e = RARRAY_AREF(th->pending_interrupt_queue, i); + if (rb_obj_is_kind_of(e, err)) { + return TRUE; + } } return FALSE; } @@ -2072,23 +2064,23 @@ rb_threadptr_pending_interrupt_deque(rb_thread_t *th, enum handle_interrupt_timi int i; for (i=0; i<RARRAY_LEN(th->pending_interrupt_queue); i++) { - VALUE err = RARRAY_AREF(th->pending_interrupt_queue, i); + VALUE err = RARRAY_AREF(th->pending_interrupt_queue, i); - enum handle_interrupt_timing mask_timing = rb_threadptr_pending_interrupt_check_mask(th, CLASS_OF(err)); + enum handle_interrupt_timing mask_timing = rb_threadptr_pending_interrupt_check_mask(th, CLASS_OF(err)); - switch (mask_timing) { - case INTERRUPT_ON_BLOCKING: - if (timing != INTERRUPT_ON_BLOCKING) { - break; - } - /* fall through */ - case INTERRUPT_NONE: /* default: IMMEDIATE */ - case INTERRUPT_IMMEDIATE: - rb_ary_delete_at(th->pending_interrupt_queue, i); - return err; - case INTERRUPT_NEVER: - break; - } + switch (mask_timing) { + case INTERRUPT_ON_BLOCKING: + if (timing != INTERRUPT_ON_BLOCKING) { + break; + } + /* fall through */ + case INTERRUPT_NONE: /* default: IMMEDIATE */ + case INTERRUPT_IMMEDIATE: + rb_ary_delete_at(th->pending_interrupt_queue, i); + return err; + case INTERRUPT_NEVER: + break; + } } th->pending_interrupt_queue_checked = 1; @@ -2096,7 +2088,7 @@ rb_threadptr_pending_interrupt_deque(rb_thread_t *th, enum handle_interrupt_timi #else VALUE err = rb_ary_shift(th->pending_interrupt_queue); if (rb_threadptr_pending_interrupt_empty_p(th)) { - th->pending_interrupt_queue_checked = 1; + th->pending_interrupt_queue_checked = 1; } return err; #endif @@ -2111,11 +2103,11 @@ threadptr_pending_interrupt_active_p(rb_thread_t *th) * since last check. */ if (th->pending_interrupt_queue_checked) { - return 0; + return 0; } if (rb_threadptr_pending_interrupt_empty_p(th)) { - return 0; + return 0; } return 1; @@ -2127,13 +2119,27 @@ handle_interrupt_arg_check_i(VALUE key, VALUE val, VALUE args) VALUE *maskp = (VALUE *)args; if (val != sym_immediate && val != sym_on_blocking && val != sym_never) { - rb_raise(rb_eArgError, "unknown mask signature"); + rb_raise(rb_eArgError, "unknown mask signature"); } - if (!*maskp) { - *maskp = rb_ident_hash_new(); + if (key == rb_eException && (UNDEF_P(*maskp) || NIL_P(*maskp))) { + *maskp = val; + return ST_CONTINUE; + } + + if (RTEST(*maskp)) { + if (!RB_TYPE_P(*maskp, T_HASH)) { + VALUE prev = *maskp; + *maskp = rb_ident_hash_new(); + if (SYMBOL_P(prev)) { + rb_hash_aset(*maskp, rb_eException, prev); + } + } + rb_hash_aset(*maskp, key, val); + } + else { + *maskp = Qfalse; } - rb_hash_aset(*maskp, key, val); return ST_CONTINUE; } @@ -2249,45 +2255,57 @@ handle_interrupt_arg_check_i(VALUE key, VALUE val, VALUE args) static VALUE rb_thread_s_handle_interrupt(VALUE self, VALUE mask_arg) { - VALUE mask; + VALUE mask = Qundef; rb_execution_context_t * volatile ec = GET_EC(); rb_thread_t * volatile th = rb_ec_thread_ptr(ec); volatile VALUE r = Qnil; enum ruby_tag_type state; if (!rb_block_given_p()) { - rb_raise(rb_eArgError, "block is needed."); + rb_raise(rb_eArgError, "block is needed."); } - mask = 0; mask_arg = rb_to_hash_type(mask_arg); + + if (OBJ_FROZEN(mask_arg) && rb_hash_compare_by_id_p(mask_arg)) { + mask = Qnil; + } + rb_hash_foreach(mask_arg, handle_interrupt_arg_check_i, (VALUE)&mask); - if (!mask) { - return rb_yield(Qnil); + + if (UNDEF_P(mask)) { + return rb_yield(Qnil); + } + + if (!RTEST(mask)) { + mask = mask_arg; } - OBJ_FREEZE_RAW(mask); + else if (RB_TYPE_P(mask, T_HASH)) { + OBJ_FREEZE_RAW(mask); + } + rb_ary_push(th->pending_interrupt_mask_stack, mask); if (!rb_threadptr_pending_interrupt_empty_p(th)) { - th->pending_interrupt_queue_checked = 0; - RUBY_VM_SET_INTERRUPT(th->ec); + th->pending_interrupt_queue_checked = 0; + RUBY_VM_SET_INTERRUPT(th->ec); } EC_PUSH_TAG(th->ec); if ((state = EC_EXEC_TAG()) == TAG_NONE) { - r = rb_yield(Qnil); + r = rb_yield(Qnil); } EC_POP_TAG(); rb_ary_pop(th->pending_interrupt_mask_stack); if (!rb_threadptr_pending_interrupt_empty_p(th)) { - th->pending_interrupt_queue_checked = 0; - RUBY_VM_SET_INTERRUPT(th->ec); + th->pending_interrupt_queue_checked = 0; + RUBY_VM_SET_INTERRUPT(th->ec); } RUBY_VM_CHECK_INTS(th->ec); if (state) { - EC_JUMP_TAG(th->ec, state); + EC_JUMP_TAG(th->ec, state); } return r; @@ -2309,10 +2327,10 @@ rb_thread_pending_interrupt_p(int argc, VALUE *argv, VALUE target_thread) rb_thread_t *target_th = rb_thread_ptr(target_thread); if (!target_th->pending_interrupt_queue) { - return Qfalse; + return Qfalse; } if (rb_threadptr_pending_interrupt_empty_p(target_th)) { - return Qfalse; + return Qfalse; } if (rb_check_arity(argc, 0, 1)) { VALUE err = argv[0]; @@ -2322,7 +2340,7 @@ rb_thread_pending_interrupt_p(int argc, VALUE *argv, VALUE target_thread) return RBOOL(rb_threadptr_pending_interrupt_include_p(target_th, err)); } else { - return Qtrue; + return Qtrue; } } @@ -2409,13 +2427,13 @@ threadptr_get_interrupts(rb_thread_t *th) rb_atomic_t old; do { - interrupt = ec->interrupt_flag; - old = ATOMIC_CAS(ec->interrupt_flag, interrupt, interrupt & ec->interrupt_mask); + interrupt = ec->interrupt_flag; + old = ATOMIC_CAS(ec->interrupt_flag, interrupt, interrupt & ec->interrupt_mask); } while (old != interrupt); return interrupt & (rb_atomic_t)~ec->interrupt_mask; } -MJIT_FUNC_EXPORTED int +int rb_threadptr_execute_interrupts(rb_thread_t *th, int blocking_timing) { rb_atomic_t interrupt; @@ -2425,16 +2443,16 @@ rb_threadptr_execute_interrupts(rb_thread_t *th, int blocking_timing) if (th->ec->raised_flag) return ret; while ((interrupt = threadptr_get_interrupts(th)) != 0) { - int sig; - int timer_interrupt; - int pending_interrupt; - int trap_interrupt; + int sig; + int timer_interrupt; + int pending_interrupt; + int trap_interrupt; int terminate_interrupt; - timer_interrupt = interrupt & TIMER_INTERRUPT_MASK; - pending_interrupt = interrupt & PENDING_INTERRUPT_MASK; - postponed_job_interrupt = interrupt & POSTPONED_JOB_INTERRUPT_MASK; - trap_interrupt = interrupt & TRAP_INTERRUPT_MASK; + timer_interrupt = interrupt & TIMER_INTERRUPT_MASK; + pending_interrupt = interrupt & PENDING_INTERRUPT_MASK; + postponed_job_interrupt = interrupt & POSTPONED_JOB_INTERRUPT_MASK; + trap_interrupt = interrupt & TRAP_INTERRUPT_MASK; terminate_interrupt = interrupt & TERMINATE_INTERRUPT_MASK; // request from other ractors if (interrupt & VM_BARRIER_INTERRUPT_MASK) { @@ -2442,76 +2460,71 @@ rb_threadptr_execute_interrupts(rb_thread_t *th, int blocking_timing) RB_VM_LOCK_LEAVE(); } - if (postponed_job_interrupt) { - rb_postponed_job_flush(th->vm); - } - - /* signal handling */ - if (trap_interrupt && (th == th->vm->ractor.main_thread)) { - enum rb_thread_status prev_status = th->status; - int sigwait_fd = rb_sigwait_fd_get(th); - - if (sigwait_fd >= 0) { - (void)consume_communication_pipe(sigwait_fd); - ruby_sigchld_handler(th->vm); - rb_sigwait_fd_put(th, sigwait_fd); - rb_sigwait_fd_migrate(th->vm); - } - th->status = THREAD_RUNNABLE; - while ((sig = rb_get_next_signal()) != 0) { - ret |= rb_signal_exec(th, sig); - } - th->status = prev_status; - } - - /* exception from another thread */ - if (pending_interrupt && threadptr_pending_interrupt_active_p(th)) { - VALUE err = rb_threadptr_pending_interrupt_deque(th, blocking_timing ? INTERRUPT_ON_BLOCKING : INTERRUPT_NONE); - thread_debug("rb_thread_execute_interrupts: %"PRIdVALUE"\n", err); + if (postponed_job_interrupt) { + rb_postponed_job_flush(th->vm); + } + + /* signal handling */ + if (trap_interrupt && (th == th->vm->ractor.main_thread)) { + enum rb_thread_status prev_status = th->status; + + th->status = THREAD_RUNNABLE; + { + while ((sig = rb_get_next_signal()) != 0) { + ret |= rb_signal_exec(th, sig); + } + } + th->status = prev_status; + } + + /* exception from another thread */ + if (pending_interrupt && threadptr_pending_interrupt_active_p(th)) { + VALUE err = rb_threadptr_pending_interrupt_deque(th, blocking_timing ? INTERRUPT_ON_BLOCKING : INTERRUPT_NONE); + RUBY_DEBUG_LOG("err:%"PRIdVALUE, err); ret = TRUE; - if (err == Qundef) { - /* no error */ - } - else if (err == eKillSignal /* Thread#kill received */ || - err == eTerminateSignal /* Terminate thread */ || - err == INT2FIX(TAG_FATAL) /* Thread.exit etc. */ ) { + if (UNDEF_P(err)) { + /* no error */ + } + else if (err == RUBY_FATAL_THREAD_KILLED /* Thread#kill received */ || + err == RUBY_FATAL_THREAD_TERMINATED /* Terminate thread */ || + err == INT2FIX(TAG_FATAL) /* Thread.exit etc. */ ) { terminate_interrupt = 1; - } - else { - if (err == th->vm->special_exceptions[ruby_error_stream_closed]) { - /* the only special exception to be queued across thread */ - err = ruby_vm_special_exception_copy(err); - } - /* set runnable if th was slept. */ - if (th->status == THREAD_STOPPED || - th->status == THREAD_STOPPED_FOREVER) - th->status = THREAD_RUNNABLE; - rb_exc_raise(err); - } - } + } + else { + if (err == th->vm->special_exceptions[ruby_error_stream_closed]) { + /* the only special exception to be queued across thread */ + err = ruby_vm_special_exception_copy(err); + } + /* set runnable if th was slept. */ + if (th->status == THREAD_STOPPED || + th->status == THREAD_STOPPED_FOREVER) + th->status = THREAD_RUNNABLE; + rb_exc_raise(err); + } + } if (terminate_interrupt) { rb_threadptr_to_kill(th); } if (timer_interrupt) { - uint32_t limits_us = TIME_QUANTUM_USEC; + uint32_t limits_us = TIME_QUANTUM_USEC; - if (th->priority > 0) - limits_us <<= th->priority; - else - limits_us >>= -th->priority; + if (th->priority > 0) + limits_us <<= th->priority; + else + limits_us >>= -th->priority; - if (th->status == THREAD_RUNNABLE) - th->running_time_us += TIME_QUANTUM_USEC; + if (th->status == THREAD_RUNNABLE) + th->running_time_us += 10 * 1000; // 10ms = 10_000us // TODO: use macro VM_ASSERT(th->ec->cfp); - EXEC_EVENT_HOOK(th->ec, RUBY_INTERNAL_EVENT_SWITCH, th->ec->cfp->self, - 0, 0, 0, Qundef); + EXEC_EVENT_HOOK(th->ec, RUBY_INTERNAL_EVENT_SWITCH, th->ec->cfp->self, + 0, 0, 0, Qundef); - rb_thread_schedule_limits(limits_us); - } + rb_thread_schedule_limits(limits_us); + } } return ret; } @@ -2534,20 +2547,20 @@ rb_threadptr_raise(rb_thread_t *target_th, int argc, VALUE *argv) VALUE exc; if (rb_threadptr_dead(target_th)) { - return Qnil; + return Qnil; } if (argc == 0) { - exc = rb_exc_new(rb_eRuntimeError, 0, 0); + exc = rb_exc_new(rb_eRuntimeError, 0, 0); } else { - exc = rb_make_exception(argc, argv); + exc = rb_make_exception(argc, argv); } /* making an exception object can switch thread, so we need to check thread deadness again */ if (rb_threadptr_dead(target_th)) { - return Qnil; + return Qnil; } rb_ec_setup_exception(GET_EC(), exc, Qundef); @@ -2582,7 +2595,7 @@ int rb_ec_set_raised(rb_execution_context_t *ec) { if (ec->raised_flag & RAISED_EXCEPTION) { - return 1; + return 1; } ec->raised_flag |= RAISED_EXCEPTION; return 0; @@ -2592,47 +2605,80 @@ int rb_ec_reset_raised(rb_execution_context_t *ec) { if (!(ec->raised_flag & RAISED_EXCEPTION)) { - return 0; + return 0; } ec->raised_flag &= ~RAISED_EXCEPTION; return 1; } int -rb_notify_fd_close(int fd, struct list_head *busy) +rb_notify_fd_close(int fd, struct rb_io_close_wait_list *busy) { rb_vm_t *vm = GET_THREAD()->vm; struct waiting_fd *wfd = 0, *next; + ccan_list_head_init(&busy->pending_fd_users); + int has_any; + VALUE wakeup_mutex; RB_VM_LOCK_ENTER(); { - list_for_each_safe(&vm->waiting_fds, wfd, next, wfd_node) { + ccan_list_for_each_safe(&vm->waiting_fds, wfd, next, wfd_node) { if (wfd->fd == fd) { rb_thread_t *th = wfd->th; VALUE err; - list_del(&wfd->wfd_node); - list_add(busy, &wfd->wfd_node); + ccan_list_del(&wfd->wfd_node); + ccan_list_add(&busy->pending_fd_users, &wfd->wfd_node); + wfd->busy = busy; err = th->vm->special_exceptions[ruby_error_stream_closed]; rb_threadptr_pending_interrupt_enque(th, err); rb_threadptr_interrupt(th); } } } + + has_any = !ccan_list_empty(&busy->pending_fd_users); + busy->closing_thread = rb_thread_current(); + wakeup_mutex = Qnil; + if (has_any) { + wakeup_mutex = rb_mutex_new(); + RBASIC_CLEAR_CLASS(wakeup_mutex); /* hide from ObjectSpace */ + } + busy->wakeup_mutex = wakeup_mutex; + RB_VM_LOCK_LEAVE(); - return !list_empty(busy); + /* If the caller didn't pass *busy as a pointer to something on the stack, + we need to guard this mutex object on _our_ C stack for the duration + of this function. */ + RB_GC_GUARD(wakeup_mutex); + return has_any; +} + +void +rb_notify_fd_close_wait(struct rb_io_close_wait_list *busy) +{ + if (!RB_TEST(busy->wakeup_mutex)) { + /* There was nobody else using this file when we closed it, so we + never bothered to allocate a mutex*/ + return; + } + + rb_mutex_lock(busy->wakeup_mutex); + while (!ccan_list_empty(&busy->pending_fd_users)) { + rb_mutex_sleep(busy->wakeup_mutex, Qnil); + } + rb_mutex_unlock(busy->wakeup_mutex); } void rb_thread_fd_close(int fd) { - struct list_head busy; + struct rb_io_close_wait_list busy; - list_head_init(&busy); if (rb_notify_fd_close(fd, &busy)) { - do rb_thread_schedule(); while (!list_empty(&busy)); + rb_notify_fd_close_wait(&busy); } } @@ -2668,7 +2714,7 @@ thread_raise_m(int argc, VALUE *argv, VALUE self) /* To perform Thread.current.raise as Kernel.raise */ if (current_th == target_th) { - RUBY_VM_CHECK_INTS(target_th->ec); + RUBY_VM_CHECK_INTS(target_th->ec); } return Qnil; } @@ -2688,36 +2734,37 @@ thread_raise_m(int argc, VALUE *argv, VALUE self) VALUE rb_thread_kill(VALUE thread) { - rb_thread_t *th = rb_thread_ptr(thread); + rb_thread_t *target_th = rb_thread_ptr(thread); - if (th->to_kill || th->status == THREAD_KILLED) { - return thread; + if (target_th->to_kill || target_th->status == THREAD_KILLED) { + return thread; } - if (th == th->vm->ractor.main_thread) { - rb_exit(EXIT_SUCCESS); + if (target_th == target_th->vm->ractor.main_thread) { + rb_exit(EXIT_SUCCESS); } - thread_debug("rb_thread_kill: %p (%"PRI_THREAD_ID")\n", (void *)th, thread_id_str(th)); + RUBY_DEBUG_LOG("target_th:%u", rb_th_serial(target_th)); - if (th == GET_THREAD()) { - /* kill myself immediately */ - rb_threadptr_to_kill(th); + if (target_th == GET_THREAD()) { + /* kill myself immediately */ + rb_threadptr_to_kill(target_th); } else { - threadptr_check_pending_interrupt_queue(th); - rb_threadptr_pending_interrupt_enque(th, eKillSignal); - rb_threadptr_interrupt(th); + threadptr_check_pending_interrupt_queue(target_th); + rb_threadptr_pending_interrupt_enque(target_th, RUBY_FATAL_THREAD_KILLED); + rb_threadptr_interrupt(target_th); } + return thread; } int rb_thread_to_be_killed(VALUE thread) { - rb_thread_t *th = rb_thread_ptr(thread); + rb_thread_t *target_th = rb_thread_ptr(thread); - if (th->to_kill || th->status == THREAD_KILLED) { - return TRUE; + if (target_th->to_kill || target_th->status == THREAD_KILLED) { + return TRUE; } return FALSE; } @@ -2783,7 +2830,7 @@ VALUE rb_thread_wakeup(VALUE thread) { if (!RTEST(rb_thread_wakeup_alive(thread))) { - rb_raise(rb_eThreadError, "killed thread"); + rb_raise(rb_eThreadError, "killed thread"); } return thread; } @@ -2797,8 +2844,8 @@ rb_thread_wakeup_alive(VALUE thread) rb_threadptr_ready(target_th); if (target_th->status == THREAD_STOPPED || - target_th->status == THREAD_STOPPED_FOREVER) { - target_th->status = THREAD_RUNNABLE; + target_th->status == THREAD_STOPPED_FOREVER) { + target_th->status = THREAD_RUNNABLE; } return thread; @@ -2873,7 +2920,7 @@ VALUE rb_thread_list(void) { // TODO - return rb_ractor_thread_list(GET_RACTOR()); + return rb_ractor_thread_list(); } /* @@ -3248,15 +3295,15 @@ thread_status_name(rb_thread_t *th, int detail) { switch (th->status) { case THREAD_RUNNABLE: - return th->to_kill ? "aborting" : "run"; + return th->to_kill ? "aborting" : "run"; case THREAD_STOPPED_FOREVER: - if (detail) return "sleep_forever"; + if (detail) return "sleep_forever"; case THREAD_STOPPED: - return "sleep"; + return "sleep"; case THREAD_KILLED: - return "dead"; + return "dead"; default: - return "unknown"; + return "unknown"; } } @@ -3304,16 +3351,16 @@ rb_thread_status(VALUE thread) rb_thread_t *target_th = rb_thread_ptr(thread); if (rb_threadptr_dead(target_th)) { - if (!NIL_P(target_th->ec->errinfo) && - !FIXNUM_P(target_th->ec->errinfo)) { - return Qnil; - } - else { - return Qfalse; - } + if (!NIL_P(target_th->ec->errinfo) && + !FIXNUM_P(target_th->ec->errinfo)) { + return Qnil; + } + else { + return Qfalse; + } } else { - return rb_str_new2(thread_status_name(target_th, FALSE)); + return rb_str_new2(thread_status_name(target_th, FALSE)); } } @@ -3335,12 +3382,7 @@ rb_thread_status(VALUE thread) static VALUE rb_thread_alive_p(VALUE thread) { - if (thread_finished(rb_thread_ptr(thread))) { - return Qfalse; - } - else { - return Qtrue; - } + return RBOOL(!thread_finished(rb_thread_ptr(thread))); } /* @@ -3363,7 +3405,7 @@ rb_thread_stop_p(VALUE thread) rb_thread_t *th = rb_thread_ptr(thread); if (rb_threadptr_dead(th)) { - return Qtrue; + return Qtrue; } return RBOOL(th->status == THREAD_STOPPED || th->status == THREAD_STOPPED_FOREVER); } @@ -3395,18 +3437,18 @@ rb_thread_setname(VALUE thread, VALUE name) rb_thread_t *target_th = rb_thread_ptr(thread); 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_str_new_frozen(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_str_new_frozen(name); } target_th->name = name; - if (threadptr_initialized(target_th)) { - native_set_another_thread_name(target_th->thread_id, name); + if (threadptr_initialized(target_th) && target_th->has_dedicated_nt) { + native_set_another_thread_name(target_th->nt->thread_id, name); } return name; } @@ -3468,7 +3510,6 @@ rb_thread_to_s(VALUE thread) if ((loc = threadptr_invoke_proc_location(target_th)) != Qnil) { rb_str_catf(str, " %"PRIsVALUE":%"PRIsVALUE, RARRAY_AREF(loc, 0), RARRAY_AREF(loc, 1)); - rb_gc_force_recycle(loc); } rb_str_catf(str, " %s>", status); @@ -3482,18 +3523,18 @@ static VALUE threadptr_local_aref(rb_thread_t *th, ID id) { if (id == recursive_key) { - return th->ec->local_storage_recursive_hash; + return th->ec->local_storage_recursive_hash; } else { - VALUE val; - struct rb_id_table *local_storage = th->ec->local_storage; + VALUE val; + struct rb_id_table *local_storage = th->ec->local_storage; - if (local_storage != NULL && rb_id_table_lookup(local_storage, id, &val)) { - return val; - } - else { - return Qnil; - } + if (local_storage != NULL && rb_id_table_lookup(local_storage, id, &val)) { + return val; + } + else { + return Qnil; + } } } @@ -3597,26 +3638,26 @@ rb_thread_fetch(int argc, VALUE *argv, VALUE self) block_given = rb_block_given_p(); if (block_given && argc == 2) { - rb_warn("block supersedes default value argument"); + rb_warn("block supersedes default value argument"); } id = rb_check_id(&key); if (id == recursive_key) { - return target_th->ec->local_storage_recursive_hash; + return target_th->ec->local_storage_recursive_hash; } else if (id && target_th->ec->local_storage && - rb_id_table_lookup(target_th->ec->local_storage, id, &val)) { - return val; + rb_id_table_lookup(target_th->ec->local_storage, id, &val)) { + return val; } else if (block_given) { - return rb_yield(key); + return rb_yield(key); } else if (argc == 1) { - rb_key_err_raise(rb_sprintf("key not found: %+"PRIsVALUE, key), self, key); + rb_key_err_raise(rb_sprintf("key not found: %+"PRIsVALUE, key), self, key); } else { - return argv[1]; + return argv[1]; } } @@ -3624,24 +3665,24 @@ static VALUE threadptr_local_aset(rb_thread_t *th, ID id, VALUE val) { if (id == recursive_key) { - th->ec->local_storage_recursive_hash = val; - return val; + th->ec->local_storage_recursive_hash = val; + return val; } else { - struct rb_id_table *local_storage = th->ec->local_storage; + struct rb_id_table *local_storage = th->ec->local_storage; - if (NIL_P(val)) { - if (!local_storage) return Qnil; - rb_id_table_delete(local_storage, id); - return Qnil; - } - else { - if (local_storage == NULL) { - th->ec->local_storage = local_storage = rb_id_table_create(0); - } - rb_id_table_insert(local_storage, id, val); - return val; - } + if (NIL_P(val)) { + if (!local_storage) return Qnil; + rb_id_table_delete(local_storage, id); + return Qnil; + } + else { + if (local_storage == NULL) { + th->ec->local_storage = local_storage = rb_id_table_create(0); + } + rb_id_table_insert(local_storage, id, val); + return val; + } } } @@ -3757,7 +3798,7 @@ rb_thread_key_p(VALUE self, VALUE key) struct rb_id_table *local_storage = rb_thread_ptr(self)->ec->local_storage; if (!id || local_storage == NULL) { - return Qfalse; + return Qfalse; } return RBOOL(rb_id_table_lookup(local_storage, id, &val)); } @@ -3797,7 +3838,7 @@ rb_thread_keys(VALUE self) VALUE ary = rb_ary_new(); if (local_storage) { - rb_id_table_foreach(local_storage, thread_keys_i, (void *)ary); + rb_id_table_foreach(local_storage, thread_keys_i, (void *)ary); } return ary; } @@ -3931,10 +3972,10 @@ rb_thread_priority_set(VALUE thread, VALUE prio) #else priority = NUM2INT(prio); if (priority > RUBY_THREAD_PRIORITY_MAX) { - priority = RUBY_THREAD_PRIORITY_MAX; + priority = RUBY_THREAD_PRIORITY_MAX; } else if (priority < RUBY_THREAD_PRIORITY_MIN) { - priority = RUBY_THREAD_PRIORITY_MIN; + priority = RUBY_THREAD_PRIORITY_MIN; } target_th->priority = (int8_t)priority; #endif @@ -3957,13 +3998,11 @@ rb_thread_priority_set(VALUE thread, VALUE prio) * - OpenBSD 2.0 (src/sys/kern/sys_generic.c:1.4) * select(2) documents how to allocate fd_set dynamically. * http://www.openbsd.org/cgi-bin/man.cgi?query=select&manpath=OpenBSD+4.4 - * - HP-UX documents how to allocate fd_set dynamically. - * http://docs.hp.com/en/B2355-60105/select.2.html * - Solaris 8 has select_large_fdset * - Mac OS X 10.7 (Lion) * select(2) returns EINVAL if nfds is greater than FD_SET_SIZE and * _DARWIN_UNLIMITED_SELECT (or _DARWIN_C_SOURCE) isn't defined. - * http://developer.apple.com/library/mac/#releasenotes/Darwin/SymbolVariantsRelNotes/_index.html + * https://developer.apple.com/library/archive/releasenotes/Darwin/SymbolVariantsRelNotes/index.html * * When fd_set is not big enough to hold big file descriptors, * it should be allocated dynamically. @@ -3990,7 +4029,7 @@ rb_fd_init_copy(rb_fdset_t *dst, rb_fdset_t *src) size_t size = howmany(rb_fd_max(src), NFDBITS) * sizeof(fd_mask); if (size < sizeof(fd_set)) - size = sizeof(fd_set); + size = sizeof(fd_set); dst->maxfd = src->maxfd; dst->fdset = xmalloc(size); memcpy(dst->fdset, src->fdset, size); @@ -3999,7 +4038,7 @@ rb_fd_init_copy(rb_fdset_t *dst, rb_fdset_t *src) void rb_fd_term(rb_fdset_t *fds) { - if (fds->fdset) xfree(fds->fdset); + xfree(fds->fdset); fds->maxfd = 0; fds->fdset = 0; } @@ -4008,7 +4047,7 @@ void rb_fd_zero(rb_fdset_t *fds) { if (fds->fdset) - MEMZERO(fds->fdset, fd_mask, howmany(fds->maxfd, NFDBITS)); + MEMZERO(fds->fdset, fd_mask, howmany(fds->maxfd, NFDBITS)); } static void @@ -4021,8 +4060,8 @@ rb_fd_resize(int n, rb_fdset_t *fds) if (o < sizeof(fd_set)) o = sizeof(fd_set); if (m > o) { - fds->fdset = xrealloc(fds->fdset, m); - memset((char *)fds->fdset + o, 0, m - o); + fds->fdset = xrealloc(fds->fdset, m); + memset((char *)fds->fdset + o, 0, m - o); } if (n >= fds->maxfd) fds->maxfd = n + 1; } @@ -4065,7 +4104,7 @@ rb_fd_dup(rb_fdset_t *dst, const rb_fdset_t *src) size_t size = howmany(rb_fd_max(src), NFDBITS) * sizeof(fd_mask); if (size < sizeof(fd_set)) - size = sizeof(fd_set); + size = sizeof(fd_set); dst->maxfd = src->maxfd; dst->fdset = xrealloc(dst->fdset, size); memcpy(dst->fdset, src->fdset, size); @@ -4139,7 +4178,7 @@ rb_fd_set(int fd, rb_fdset_t *set) } } if (set->fdset->fd_count >= (unsigned)set->capa) { - set->capa = (set->fdset->fd_count / FD_SETSIZE + 1) * FD_SETSIZE; + set->capa = (set->fdset->fd_count / FD_SETSIZE + 1) * FD_SETSIZE; set->fdset = rb_xrealloc_mul_add( set->fdset, set->capa, sizeof(SOCKET), sizeof(unsigned int)); @@ -4183,7 +4222,7 @@ wait_retryable(int *result, int errnum, rb_hrtime_t *rel, rb_hrtime_t end) return FALSE; } else if (*result == 0) { - /* check for spurious wakeup */ + /* check for spurious wakeup */ if (rel) { return !hrtime_update_expire(rel, end); } @@ -4194,7 +4233,6 @@ wait_retryable(int *result, int errnum, rb_hrtime_t *rel, rb_hrtime_t end) struct select_set { int max; - int sigwait_fd; rb_thread_t *th; rb_fdset_t *rset; rb_fdset_t *wset; @@ -4210,11 +4248,6 @@ select_set_free(VALUE p) { struct select_set *set = (struct select_set *)p; - if (set->sigwait_fd >= 0) { - rb_sigwait_fd_put(set->th, set->sigwait_fd); - rb_sigwait_fd_migrate(set->th->vm); - } - rb_fd_term(&set->orig_rset); rb_fd_term(&set->orig_wset); rb_fd_term(&set->orig_eset); @@ -4222,24 +4255,6 @@ select_set_free(VALUE p) return Qfalse; } -static const rb_hrtime_t * -sigwait_timeout(rb_thread_t *th, int sigwait_fd, const rb_hrtime_t *orig, - int *drained_p) -{ - static const rb_hrtime_t quantum = TIME_QUANTUM_USEC * 1000; - - if (sigwait_fd >= 0 && (!ubf_threads_empty() || BUSY_WAIT_SIGNALS)) { - *drained_p = check_signals_nogvl(th, sigwait_fd); - if (!orig || *orig > quantum) - return &quantum; - } - - return orig; -} - -#define sigwait_signals_fd(result, cond, sigwait_fd) \ - (result > 0 && (cond) ? (result--, (sigwait_fd)) : -1) - static VALUE do_select(VALUE p) { @@ -4258,54 +4273,32 @@ do_select(VALUE p) TRUE) do { - int drained; - lerrno = 0; + lerrno = 0; - BLOCKING_REGION(set->th, { - const rb_hrtime_t *sto; + BLOCKING_REGION(set->th, { struct timeval tv; - sto = sigwait_timeout(set->th, set->sigwait_fd, to, &drained); if (!RUBY_VM_INTERRUPTED(set->th->ec)) { - result = native_fd_select(set->max, set->rset, set->wset, - set->eset, - rb_hrtime2timeval(&tv, sto), set->th); + result = native_fd_select(set->max, + set->rset, set->wset, set->eset, + rb_hrtime2timeval(&tv, to), set->th); if (result < 0) lerrno = errno; } - }, set->sigwait_fd >= 0 ? ubf_sigwait : ubf_select, set->th, TRUE); - - if (set->sigwait_fd >= 0) { - int fd = sigwait_signals_fd(result, - rb_fd_isset(set->sigwait_fd, set->rset), - set->sigwait_fd); - (void)check_signals_nogvl(set->th, fd); - } + }, ubf_select, set->th, TRUE); RUBY_VM_CHECK_INTS_BLOCKING(set->th->ec); /* may raise */ } while (wait_retryable(&result, lerrno, to, end) && do_select_update()); if (result < 0) { - errno = lerrno; + errno = lerrno; } return (VALUE)result; } -static rb_fdset_t * -init_set_fd(int fd, rb_fdset_t *fds) -{ - if (fd < 0) { - return 0; - } - rb_fd_init(fds); - rb_fd_set(fd, fds); - - return fds; -} - int rb_thread_fd_select(int max, rb_fdset_t * read, rb_fdset_t * write, rb_fdset_t * except, - struct timeval *timeout) + struct timeval *timeout) { struct select_set set; @@ -4326,16 +4319,6 @@ rb_thread_fd_select(int max, rb_fdset_t * read, rb_fdset_t * write, rb_fdset_t * return 0; } - set.sigwait_fd = rb_sigwait_fd_get(set.th); - if (set.sigwait_fd >= 0) { - if (set.rset) - rb_fd_set(set.sigwait_fd, set.rset); - else - set.rset = init_set_fd(set.sigwait_fd, &set.orig_rset); - if (set.sigwait_fd >= set.max) { - set.max = set.sigwait_fd + 1; - } - } #define fd_init_copy(f) do { \ if (set.f) { \ rb_fd_resize(set.max - 1, set.f); \ @@ -4372,87 +4355,67 @@ rb_thread_fd_select(int max, rb_fdset_t * read, rb_fdset_t * write, rb_fdset_t * int rb_thread_wait_for_single_fd(int fd, int events, struct timeval *timeout) { - struct pollfd fds[2]; + struct pollfd fds[1] = {{ + .fd = fd, + .events = (short)events, + .revents = 0, + }}; int result = 0; - int drained; nfds_t nfds; - rb_unblock_function_t *ubf; struct waiting_fd wfd; - int state; + enum ruby_tag_type state; volatile int lerrno; - wfd.th = GET_THREAD(); - wfd.fd = fd; + rb_execution_context_t *ec = GET_EC(); + rb_thread_t *th = rb_ec_thread_ptr(ec); - RB_VM_LOCK_ENTER(); - { - list_add(&wfd.th->vm->waiting_fds, &wfd.wfd_node); - } - RB_VM_LOCK_LEAVE(); + thread_io_setup_wfd(th, fd, &wfd); - EC_PUSH_TAG(wfd.th->ec); - if ((state = EC_EXEC_TAG()) == TAG_NONE) { - rb_hrtime_t *to, rel, end = 0; - RUBY_VM_CHECK_INTS_BLOCKING(wfd.th->ec); - timeout_prepare(&to, &rel, &end, timeout); - fds[0].fd = fd; - fds[0].events = (short)events; - fds[0].revents = 0; - do { - fds[1].fd = rb_sigwait_fd_get(wfd.th); - - if (fds[1].fd >= 0) { - fds[1].events = POLLIN; - fds[1].revents = 0; - nfds = 2; - ubf = ubf_sigwait; - } - else { + if (timeout == NULL && thread_io_wait_events(th, fd, events, NULL)) { + // fd is readable + state = 0; + fds[0].revents = events; + errno = 0; + } + else { + EC_PUSH_TAG(wfd.th->ec); + if ((state = EC_EXEC_TAG()) == TAG_NONE) { + rb_hrtime_t *to, rel, end = 0; + RUBY_VM_CHECK_INTS_BLOCKING(wfd.th->ec); + timeout_prepare(&to, &rel, &end, timeout); + do { nfds = 1; - ubf = ubf_select; - } - lerrno = 0; - BLOCKING_REGION(wfd.th, { - const rb_hrtime_t *sto; - struct timespec ts; + lerrno = 0; + BLOCKING_REGION(wfd.th, { + struct timespec ts; - sto = sigwait_timeout(wfd.th, fds[1].fd, to, &drained); - if (!RUBY_VM_INTERRUPTED(wfd.th->ec)) { - result = ppoll(fds, nfds, rb_hrtime2timespec(&ts, sto), 0); - if (result < 0) lerrno = errno; - } - }, ubf, wfd.th, TRUE); + if (!RUBY_VM_INTERRUPTED(wfd.th->ec)) { + result = ppoll(fds, nfds, rb_hrtime2timespec(&ts, to), 0); + if (result < 0) lerrno = errno; + } + }, ubf_select, wfd.th, TRUE); - if (fds[1].fd >= 0) { - int fd1 = sigwait_signals_fd(result, fds[1].revents, fds[1].fd); - (void)check_signals_nogvl(wfd.th, fd1); - rb_sigwait_fd_put(wfd.th, fds[1].fd); - rb_sigwait_fd_migrate(wfd.th->vm); - } - RUBY_VM_CHECK_INTS_BLOCKING(wfd.th->ec); - } while (wait_retryable(&result, lerrno, to, end)); + RUBY_VM_CHECK_INTS_BLOCKING(wfd.th->ec); + } while (wait_retryable(&result, lerrno, to, end)); + } + EC_POP_TAG(); } - EC_POP_TAG(); - RB_VM_LOCK_ENTER(); - { - list_del(&wfd.wfd_node); - } - RB_VM_LOCK_LEAVE(); + thread_io_wake_pending_closer(&wfd); if (state) { EC_JUMP_TAG(wfd.th->ec, state); } if (result < 0) { - errno = lerrno; - return -1; + errno = lerrno; + return -1; } if (fds[0].revents & POLLNVAL) { - errno = EBADF; - return -1; + errno = EBADF; + return -1; } /* @@ -4461,23 +4424,23 @@ rb_thread_wait_for_single_fd(int fd, int events, struct timeval *timeout) */ result = 0; if (fds[0].revents & POLLIN_SET) - result |= RB_WAITFD_IN; + result |= RB_WAITFD_IN; if (fds[0].revents & POLLOUT_SET) - result |= RB_WAITFD_OUT; + result |= RB_WAITFD_OUT; if (fds[0].revents & POLLEX_SET) - result |= RB_WAITFD_PRI; + result |= RB_WAITFD_PRI; /* all requested events are ready if there is an error */ if (fds[0].revents & POLLERR_SET) - result |= events; + result |= events; return result; } #else /* ! USE_POLL - implement rb_io_poll_fd() using select() */ struct select_args { union { - int fd; - int error; + int fd; + int error; } as; rb_fdset_t *read; rb_fdset_t *write; @@ -4495,15 +4458,15 @@ select_single(VALUE ptr) r = rb_thread_fd_select(args->as.fd + 1, args->read, args->write, args->except, args->tv); if (r == -1) - args->as.error = errno; + args->as.error = errno; if (r > 0) { - r = 0; - if (args->read && rb_fd_isset(args->as.fd, args->read)) - r |= RB_WAITFD_IN; - if (args->write && rb_fd_isset(args->as.fd, args->write)) - r |= RB_WAITFD_OUT; - if (args->except && rb_fd_isset(args->as.fd, args->except)) - r |= RB_WAITFD_PRI; + r = 0; + if (args->read && rb_fd_isset(args->as.fd, args->read)) + r |= RB_WAITFD_IN; + if (args->write && rb_fd_isset(args->as.fd, args->write)) + r |= RB_WAITFD_OUT; + if (args->except && rb_fd_isset(args->as.fd, args->except)) + r |= RB_WAITFD_PRI; } return (VALUE)r; } @@ -4513,7 +4476,7 @@ select_single_cleanup(VALUE ptr) { struct select_args *args = (struct select_args *)ptr; - list_del(&args->wfd.wfd_node); + thread_io_wake_pending_closer(&args->wfd); if (args->read) rb_fd_term(args->read); if (args->write) rb_fd_term(args->write); if (args->except) rb_fd_term(args->except); @@ -4521,6 +4484,18 @@ select_single_cleanup(VALUE ptr) return (VALUE)-1; } +static rb_fdset_t * +init_set_fd(int fd, rb_fdset_t *fds) +{ + if (fd < 0) { + return 0; + } + rb_fd_init(fds); + rb_fd_set(fd, fds); + + return fds; +} + int rb_thread_wait_for_single_fd(int fd, int events, struct timeval *timeout) { @@ -4528,24 +4503,19 @@ rb_thread_wait_for_single_fd(int fd, int events, struct timeval *timeout) struct select_args args; int r; VALUE ptr = (VALUE)&args; + rb_execution_context_t *ec = GET_EC(); + rb_thread_t *th = rb_ec_thread_ptr(ec); args.as.fd = fd; args.read = (events & RB_WAITFD_IN) ? init_set_fd(fd, &rfds) : NULL; args.write = (events & RB_WAITFD_OUT) ? init_set_fd(fd, &wfds) : NULL; args.except = (events & RB_WAITFD_PRI) ? init_set_fd(fd, &efds) : NULL; args.tv = timeout; - args.wfd.fd = fd; - args.wfd.th = GET_THREAD(); - - RB_VM_LOCK_ENTER(); - { - list_add(&args.wfd.th->vm->waiting_fds, &args.wfd.wfd_node); - } - RB_VM_LOCK_LEAVE(); + thread_io_setup_wfd(th, fd, &args.wfd); r = (int)rb_ensure(select_single, ptr, select_single_cleanup, ptr); if (r == -1) - errno = args.as.error; + errno = args.as.error; return r; } @@ -4573,8 +4543,8 @@ rb_threadptr_check_signal(rb_thread_t *mth) { /* mth must be main_thread */ if (rb_signal_buff_size() > 0) { - /* wakeup main thread */ - threadptr_trap_interrupt(mth); + /* wakeup main thread */ + threadptr_trap_interrupt(mth); } } @@ -4584,7 +4554,7 @@ async_bug_fd(const char *mesg, int errno_arg, int fd) char buff[64]; size_t n = strlcpy(buff, mesg, sizeof(buff)); if (n < sizeof(buff)-3) { - ruby_snprintf(buff+n, sizeof(buff)-n, "(%d)", fd); + ruby_snprintf(buff+n, sizeof(buff)-n, "(%d)", fd); } rb_async_bug_errno(buff, errno_arg); } @@ -4602,67 +4572,44 @@ consume_communication_pipe(int fd) ssize_t result; int ret = FALSE; /* for rb_sigwait_sleep */ - /* - * disarm UBF_TIMER before we read, because it can become - * re-armed at any time via sighandler and the pipe will refill - * We can disarm it because this thread is now processing signals - * and we do not want unnecessary SIGVTALRM - */ - ubf_timer_disarm(); - while (1) { - result = read(fd, buff, sizeof(buff)); - if (result > 0) { - ret = TRUE; - if (USE_EVENTFD || result < (ssize_t)sizeof(buff)) { - return ret; - } - } - else if (result == 0) { - return ret; - } - else if (result < 0) { - int e = errno; - switch (e) { - case EINTR: - continue; /* retry */ - case EAGAIN: -#if defined(EWOULDBLOCK) && EWOULDBLOCK != EAGAIN - case EWOULDBLOCK: + result = read(fd, buff, sizeof(buff)); +#if USE_EVENTFD + RUBY_DEBUG_LOG("resultf:%d buff:%lu", (int)result, (unsigned long)buff[0]); +#else + RUBY_DEBUG_LOG("result:%d", (int)result); #endif - return ret; - default: - async_bug_fd("consume_communication_pipe: read", e, fd); - } - } - } -} - -static int -check_signals_nogvl(rb_thread_t *th, int sigwait_fd) -{ - rb_vm_t *vm = GET_VM(); /* th may be 0 */ - int ret = sigwait_fd >= 0 ? consume_communication_pipe(sigwait_fd) : FALSE; - ubf_wakeup_all_threads(); - ruby_sigchld_handler(vm); - if (rb_signal_buff_size()) { - if (th == vm->ractor.main_thread) { - /* no need to lock + wakeup if already in main thread */ - RUBY_VM_SET_TRAP_INTERRUPT(th->ec); + if (result > 0) { + ret = TRUE; + if (USE_EVENTFD || result < (ssize_t)sizeof(buff)) { + return ret; + } } - else { - threadptr_trap_interrupt(vm->ractor.main_thread); + else if (result == 0) { + return ret; + } + else if (result < 0) { + int e = errno; + switch (e) { + case EINTR: + continue; /* retry */ + case EAGAIN: +#if defined(EWOULDBLOCK) && EWOULDBLOCK != EAGAIN + case EWOULDBLOCK: +#endif + return ret; + default: + async_bug_fd("consume_communication_pipe: read", e, fd); + } } - ret = TRUE; /* for SIGCHLD_LOSSY && rb_sigwait_sleep */ } - return ret; } void rb_thread_stop_timer_thread(void) { if (TIMER_THREAD_CREATED_P() && native_stop_timer_thread()) { - native_reset_timer_thread(); + native_reset_timer_thread(); } } @@ -4700,10 +4647,10 @@ clear_coverage_i(st_data_t key, st_data_t val, st_data_t dummy) } } if (branches) { - VALUE counters = RARRAY_AREF(branches, 1); - for (i = 0; i < RARRAY_LEN(counters); i++) { - RARRAY_ASET(counters, i, INT2FIX(0)); - } + VALUE counters = RARRAY_AREF(branches, 1); + for (i = 0; i < RARRAY_LEN(counters); i++) { + RARRAY_ASET(counters, i, INT2FIX(0)); + } } return ST_CONTINUE; @@ -4731,21 +4678,21 @@ rb_thread_atfork_internal(rb_thread_t *th, void (*atfork)(rb_thread_t *, const r r->threads.main = th; r->status_ = ractor_created; - gvl_atfork(rb_ractor_gvl(th->ractor)); + thread_sched_atfork(TH_SCHED(th)); ubf_list_atfork(); // OK. Only this thread accesses: - list_for_each(&vm->ractor.set, r, vmlr_node) { - list_for_each(&r->threads.set, i, lt_node) { + ccan_list_for_each(&vm->ractor.set, r, vmlr_node) { + ccan_list_for_each(&r->threads.set, i, lt_node) { atfork(i, th); } } rb_vm_living_threads_init(vm); rb_ractor_atfork(vm, th); + rb_vm_postponed_job_atfork(); - /* may be held by MJIT threads in parent */ - rb_native_mutex_initialize(&vm->waitpid_lock); + /* may be held by RJIT threads in parent */ rb_native_mutex_initialize(&vm->workqueue_lock); /* may be held by any thread in parent */ @@ -4755,6 +4702,10 @@ rb_thread_atfork_internal(rb_thread_t *th, void (*atfork)(rb_thread_t *, const r rb_ractor_sleeper_threads_clear(th->ractor); rb_clear_coverages(); + // restart timer thread (timer threads access to `vm->waitpid_lock` and so on. + rb_thread_reset_timer_thread(); + rb_thread_start_timer_thread(); + VM_ASSERT(vm->ractor.blocking_cnt == 0); VM_ASSERT(vm->ractor.cnt == 1); } @@ -4763,9 +4714,9 @@ static void terminate_atfork_i(rb_thread_t *th, const rb_thread_t *current_th) { if (th != current_th) { - rb_mutex_abandon_keeping_mutexes(th); - rb_mutex_abandon_locking_mutex(th); - thread_cleanup_func(th, TRUE); + rb_mutex_abandon_keeping_mutexes(th); + rb_mutex_abandon_locking_mutex(th); + thread_cleanup_func(th, TRUE); } } @@ -4774,22 +4725,20 @@ void rb_thread_atfork(void) { rb_thread_t *th = GET_THREAD(); + rb_threadptr_pending_interrupt_clear(th); rb_thread_atfork_internal(th, terminate_atfork_i); th->join_list = NULL; rb_fiber_atfork(th); /* We don't want reproduce CVE-2003-0900. */ rb_reset_random_seed(); - - /* For child, starting MJIT worker thread in this place which is safer than immediately after `after_fork_ruby`. */ - mjit_child_after_fork(); } static void terminate_atfork_before_exec_i(rb_thread_t *th, const rb_thread_t *current_th) { if (th != current_th) { - thread_cleanup_func_before_exec(th); + thread_cleanup_func_before_exec(th); } } @@ -4813,19 +4762,16 @@ rb_thread_atfork_before_exec(void) struct thgroup { int enclosed; - VALUE group; }; -static size_t -thgroup_memsize(const void *ptr) -{ - return sizeof(struct thgroup); -} - static const rb_data_type_t thgroup_data_type = { "thgroup", - {0, RUBY_TYPED_DEFAULT_FREE, thgroup_memsize,}, - 0, 0, RUBY_TYPED_FREE_IMMEDIATELY + { + 0, + RUBY_TYPED_DEFAULT_FREE, + NULL, // No external memory to report + }, + 0, 0, RUBY_TYPED_FREE_IMMEDIATELY | RUBY_TYPED_WB_PROTECTED | RUBY_TYPED_EMBEDDABLE }; /* @@ -4855,7 +4801,6 @@ thgroup_s_alloc(VALUE klass) group = TypedData_Make_Struct(klass, struct thgroup, &thgroup_data_type, data); data->enclosed = 0; - data->group = group; return group; } @@ -4876,10 +4821,10 @@ thgroup_list(VALUE group) rb_thread_t *th = 0; rb_ractor_t *r = GET_RACTOR(); - list_for_each(&r->threads.set, th, lt_node) { + ccan_list_for_each(&r->threads.set, th, lt_node) { if (th->thgroup == group) { - rb_ary_push(ary, th->self); - } + rb_ary_push(ary, th->self); + } } return ary; } @@ -4963,20 +4908,20 @@ thgroup_add(VALUE group, VALUE thread) struct thgroup *data; if (OBJ_FROZEN(group)) { - rb_raise(rb_eThreadError, "can't move to the frozen thread group"); + rb_raise(rb_eThreadError, "can't move to the frozen thread group"); } TypedData_Get_Struct(group, struct thgroup, &thgroup_data_type, data); if (data->enclosed) { - rb_raise(rb_eThreadError, "can't move to the enclosed thread group"); + rb_raise(rb_eThreadError, "can't move to the enclosed thread group"); } if (OBJ_FROZEN(target_th->thgroup)) { - rb_raise(rb_eThreadError, "can't move from the frozen thread group"); + rb_raise(rb_eThreadError, "can't move from the frozen thread group"); } TypedData_Get_Struct(target_th->thgroup, struct thgroup, &thgroup_data_type, data); if (data->enclosed) { - rb_raise(rb_eThreadError, - "can't move from the enclosed thread group"); + rb_raise(rb_eThreadError, + "can't move from the enclosed thread group"); } target_th->thgroup = group; @@ -5021,7 +4966,7 @@ rb_thread_shield_waiting_inc(VALUE b) unsigned int w = rb_thread_shield_waiting(b); w++; if (w > THREAD_SHIELD_WAITING_MAX) - rb_raise(rb_eRuntimeError, "waiting count overflow"); + rb_raise(rb_eRuntimeError, "waiting count overflow"); RBASIC(b)->flags &= ~THREAD_SHIELD_WAITING_MASK; RBASIC(b)->flags |= ((VALUE)w << THREAD_SHIELD_WAITING_SHIFT); } @@ -5044,6 +4989,17 @@ rb_thread_shield_new(void) return thread_shield; } +bool +rb_thread_shield_owned(VALUE self) +{ + VALUE mutex = GetThreadShieldPtr(self); + if (!mutex) return false; + + rb_mutex_t *m = mutex_ptr(mutex); + + return m->fiber == GET_EC()->fiber_ptr; +} + /* * Wait a thread shield. * @@ -5074,7 +5030,7 @@ thread_shield_get_mutex(VALUE self) { VALUE mutex = GetThreadShieldPtr(self); if (!mutex) - rb_raise(rb_eThreadError, "destroyed thread shield - %p", (void *)self); + rb_raise(rb_eThreadError, "destroyed thread shield - %p", (void *)self); return mutex; } @@ -5128,27 +5084,27 @@ recursive_list_access(VALUE sym) VALUE hash = threadptr_recursive_hash(th); VALUE list; if (NIL_P(hash) || !RB_TYPE_P(hash, T_HASH)) { - hash = rb_ident_hash_new(); - threadptr_recursive_hash_set(th, hash); - list = Qnil; + hash = rb_ident_hash_new(); + threadptr_recursive_hash_set(th, hash); + list = Qnil; } else { - list = rb_hash_aref(hash, sym); + list = rb_hash_aref(hash, sym); } if (NIL_P(list) || !RB_TYPE_P(list, T_HASH)) { - list = rb_ident_hash_new(); - rb_hash_aset(hash, sym, list); + list = rb_ident_hash_new(); + rb_hash_aset(hash, sym, list); } return list; } /* - * Returns Qtrue if and only if obj (or the pair <obj, paired_obj>) is already + * Returns true if and only if obj (or the pair <obj, paired_obj>) is already * in the recursion list. * Assumes the recursion list is valid. */ -static VALUE +static bool recursive_check(VALUE list, VALUE obj, VALUE paired_obj_id) { #if SIZEOF_LONG == SIZEOF_VOIDP @@ -5159,19 +5115,19 @@ recursive_check(VALUE list, VALUE obj, VALUE paired_obj_id) #endif VALUE pair_list = rb_hash_lookup2(list, obj, Qundef); - if (pair_list == Qundef) - return Qfalse; + if (UNDEF_P(pair_list)) + return false; if (paired_obj_id) { - if (!RB_TYPE_P(pair_list, T_HASH)) { - if (!OBJ_ID_EQL(paired_obj_id, pair_list)) - return Qfalse; - } - else { - if (NIL_P(rb_hash_lookup(pair_list, paired_obj_id))) - return Qfalse; - } + if (!RB_TYPE_P(pair_list, T_HASH)) { + if (!OBJ_ID_EQL(paired_obj_id, pair_list)) + return false; + } + else { + if (NIL_P(rb_hash_lookup(pair_list, paired_obj_id))) + return false; + } } - return Qtrue; + return true; } /* @@ -5189,19 +5145,19 @@ recursive_push(VALUE list, VALUE obj, VALUE paired_obj) VALUE pair_list; if (!paired_obj) { - rb_hash_aset(list, obj, Qtrue); + rb_hash_aset(list, obj, Qtrue); } - else if ((pair_list = rb_hash_lookup2(list, obj, Qundef)) == Qundef) { - rb_hash_aset(list, obj, paired_obj); + else if (UNDEF_P(pair_list = rb_hash_lookup2(list, obj, Qundef))) { + rb_hash_aset(list, obj, paired_obj); } else { - if (!RB_TYPE_P(pair_list, T_HASH)){ - VALUE other_paired_obj = pair_list; - pair_list = rb_hash_new(); - rb_hash_aset(pair_list, other_paired_obj, Qtrue); - rb_hash_aset(list, obj, pair_list); - } - rb_hash_aset(pair_list, paired_obj, Qtrue); + if (!RB_TYPE_P(pair_list, T_HASH)){ + VALUE other_paired_obj = pair_list; + pair_list = rb_hash_new(); + rb_hash_aset(pair_list, other_paired_obj, Qtrue); + rb_hash_aset(list, obj, pair_list); + } + rb_hash_aset(pair_list, paired_obj, Qtrue); } } @@ -5217,16 +5173,16 @@ static int recursive_pop(VALUE list, VALUE obj, VALUE paired_obj) { if (paired_obj) { - VALUE pair_list = rb_hash_lookup2(list, obj, Qundef); - if (pair_list == Qundef) { - return 0; - } - if (RB_TYPE_P(pair_list, T_HASH)) { - rb_hash_delete_entry(pair_list, paired_obj); - if (!RHASH_EMPTY_P(pair_list)) { - return 1; /* keep hash until is empty */ - } - } + VALUE pair_list = rb_hash_lookup2(list, obj, Qundef); + if (UNDEF_P(pair_list)) { + return 0; + } + if (RB_TYPE_P(pair_list, T_HASH)) { + rb_hash_delete_entry(pair_list, paired_obj); + if (!RHASH_EMPTY_P(pair_list)) { + return 1; /* keep hash until is empty */ + } + } } rb_hash_delete_entry(list, obj); return 1; @@ -5251,7 +5207,7 @@ exec_recursive_i(RB_BLOCK_CALL_FUNC_ARGLIST(tag, data)) * Calls func(obj, arg, recursive), where recursive is non-zero if the * current method is called recursively on obj, or on the pair <obj, pairid> * If outer is 0, then the innermost func will be called with recursive set - * to Qtrue, otherwise the outermost func will be called. In the latter case, + * to true, otherwise the outermost func will be called. In the latter case, * all inner func are short-circuited by throw. * Implementation details: the value thrown is the recursive list which is * proper to the current method and unlikely to be caught anywhere else. @@ -5259,10 +5215,9 @@ exec_recursive_i(RB_BLOCK_CALL_FUNC_ARGLIST(tag, data)) */ static VALUE -exec_recursive(VALUE (*func) (VALUE, VALUE, int), VALUE obj, VALUE pairid, VALUE arg, int outer) +exec_recursive(VALUE (*func) (VALUE, VALUE, int), VALUE obj, VALUE pairid, VALUE arg, int outer, ID mid) { VALUE result = Qundef; - const ID mid = rb_frame_last_func(); const VALUE sym = mid ? ID2SYM(mid) : ID2SYM(idNULL); struct exec_recursive_params p; int outermost; @@ -5273,41 +5228,41 @@ exec_recursive(VALUE (*func) (VALUE, VALUE, int), VALUE obj, VALUE pairid, VALUE outermost = outer && !recursive_check(p.list, ID2SYM(recursive_key), 0); if (recursive_check(p.list, p.obj, pairid)) { - if (outer && !outermost) { - rb_throw_obj(p.list, p.list); - } - return (*func)(obj, arg, TRUE); + if (outer && !outermost) { + rb_throw_obj(p.list, p.list); + } + return (*func)(obj, arg, TRUE); } else { - enum ruby_tag_type state; - - p.func = func; - - if (outermost) { - recursive_push(p.list, ID2SYM(recursive_key), 0); - recursive_push(p.list, p.obj, p.pairid); - result = rb_catch_protect(p.list, exec_recursive_i, (VALUE)&p, &state); - if (!recursive_pop(p.list, p.obj, p.pairid)) goto invalid; - if (!recursive_pop(p.list, ID2SYM(recursive_key), 0)) goto invalid; - if (state != TAG_NONE) EC_JUMP_TAG(GET_EC(), state); - if (result == p.list) { - result = (*func)(obj, arg, TRUE); - } - } - else { - volatile VALUE ret = Qundef; - recursive_push(p.list, p.obj, p.pairid); - EC_PUSH_TAG(GET_EC()); - if ((state = EC_EXEC_TAG()) == TAG_NONE) { - ret = (*func)(obj, arg, FALSE); - } - EC_POP_TAG(); - if (!recursive_pop(p.list, p.obj, p.pairid)) { + enum ruby_tag_type state; + + p.func = func; + + if (outermost) { + recursive_push(p.list, ID2SYM(recursive_key), 0); + recursive_push(p.list, p.obj, p.pairid); + result = rb_catch_protect(p.list, exec_recursive_i, (VALUE)&p, &state); + if (!recursive_pop(p.list, p.obj, p.pairid)) goto invalid; + if (!recursive_pop(p.list, ID2SYM(recursive_key), 0)) goto invalid; + if (state != TAG_NONE) EC_JUMP_TAG(GET_EC(), state); + if (result == p.list) { + result = (*func)(obj, arg, TRUE); + } + } + else { + volatile VALUE ret = Qundef; + recursive_push(p.list, p.obj, p.pairid); + EC_PUSH_TAG(GET_EC()); + if ((state = EC_EXEC_TAG()) == TAG_NONE) { + ret = (*func)(obj, arg, FALSE); + } + EC_POP_TAG(); + if (!recursive_pop(p.list, p.obj, p.pairid)) { goto invalid; - } - if (state != TAG_NONE) EC_JUMP_TAG(GET_EC(), state); - result = ret; - } + } + if (state != TAG_NONE) EC_JUMP_TAG(GET_EC(), state); + result = ret; + } } *(volatile struct exec_recursive_params *)&p; return result; @@ -5327,7 +5282,7 @@ exec_recursive(VALUE (*func) (VALUE, VALUE, int), VALUE obj, VALUE pairid, VALUE VALUE rb_exec_recursive(VALUE (*func) (VALUE, VALUE, int), VALUE obj, VALUE arg) { - return exec_recursive(func, obj, 0, arg, 0); + return exec_recursive(func, obj, 0, arg, 0, rb_frame_last_func()); } /* @@ -5338,31 +5293,37 @@ rb_exec_recursive(VALUE (*func) (VALUE, VALUE, int), VALUE obj, VALUE arg) VALUE rb_exec_recursive_paired(VALUE (*func) (VALUE, VALUE, int), VALUE obj, VALUE paired_obj, VALUE arg) { - return exec_recursive(func, obj, rb_memory_id(paired_obj), arg, 0); + return exec_recursive(func, obj, rb_memory_id(paired_obj), arg, 0, rb_frame_last_func()); } /* * If recursion is detected on the current method and obj, the outermost - * func will be called with (obj, arg, Qtrue). All inner func will be + * func will be called with (obj, arg, true). All inner func will be * short-circuited using throw. */ VALUE rb_exec_recursive_outer(VALUE (*func) (VALUE, VALUE, int), VALUE obj, VALUE arg) { - return exec_recursive(func, obj, 0, arg, 1); + return exec_recursive(func, obj, 0, arg, 1, rb_frame_last_func()); +} + +VALUE +rb_exec_recursive_outer_mid(VALUE (*func) (VALUE, VALUE, int), VALUE obj, VALUE arg, ID mid) +{ + return exec_recursive(func, obj, 0, arg, 1, mid); } /* * If recursion is detected on the current method, obj and paired_obj, - * the outermost func will be called with (obj, arg, Qtrue). All inner + * the outermost func will be called with (obj, arg, true). All inner * func will be short-circuited using throw. */ VALUE rb_exec_recursive_paired_outer(VALUE (*func) (VALUE, VALUE, int), VALUE obj, VALUE paired_obj, VALUE arg) { - return exec_recursive(func, obj, rb_memory_id(paired_obj), arg, 1); + return exec_recursive(func, obj, rb_memory_id(paired_obj), arg, 1, rb_frame_last_func()); } /* @@ -5401,7 +5362,6 @@ Init_Thread_Mutex(void) { rb_thread_t *th = GET_THREAD(); - rb_native_mutex_initialize(&th->vm->waitpid_lock); rb_native_mutex_initialize(&th->vm->workqueue_lock); rb_native_mutex_initialize(&th->interrupt_lock); } @@ -5447,10 +5407,6 @@ Init_Thread(void) rb_define_singleton_method(rb_cThread, "report_on_exception=", rb_thread_s_report_exc_set, 1); rb_define_singleton_method(rb_cThread, "ignore_deadlock", rb_thread_s_ignore_deadlock, 0); rb_define_singleton_method(rb_cThread, "ignore_deadlock=", rb_thread_s_ignore_deadlock_set, 1); -#if THREAD_DEBUG < 0 - rb_define_singleton_method(rb_cThread, "DEBUG", rb_thread_s_debug, 0); - rb_define_singleton_method(rb_cThread, "DEBUG=", rb_thread_s_debug_set, 1); -#endif rb_define_singleton_method(rb_cThread, "handle_interrupt", rb_thread_s_handle_interrupt, 1); rb_define_singleton_method(rb_cThread, "pending_interrupt?", rb_thread_s_pending_interrupt_p, -1); rb_define_method(rb_cThread, "pending_interrupt?", rb_thread_pending_interrupt_p, -1); @@ -5493,7 +5449,7 @@ Init_Thread(void) rb_define_alias(rb_cThread, "inspect", "to_s"); rb_vm_register_special_exception(ruby_error_stream_closed, rb_eIOError, - "stream closed in another thread"); + "stream closed in another thread"); cThGroup = rb_define_class("ThreadGroup", rb_cObject); rb_define_alloc_func(cThGroup, thgroup_s_alloc); @@ -5504,28 +5460,35 @@ Init_Thread(void) { th->thgroup = th->ractor->thgroup_default = rb_obj_alloc(cThGroup); - rb_define_const(cThGroup, "Default", th->thgroup); + rb_define_const(cThGroup, "Default", th->thgroup); } rb_eThreadError = rb_define_class("ThreadError", rb_eStandardError); /* init thread core */ { - /* main thread setting */ - { - /* acquire global vm lock */ - rb_global_vm_lock_t *gvl = rb_ractor_gvl(th->ractor); - gvl_acquire(gvl, th); + /* main thread setting */ + { + /* acquire global vm lock */ +#ifdef HAVE_PTHREAD_NP_H + VM_ASSERT(TH_SCHED(th)->running == th); +#endif + // thread_sched_to_running() should not be called because + // it assumes blocked by thread_sched_to_waiting(). + // thread_sched_to_running(sched, th); - th->pending_interrupt_queue = rb_ary_tmp_new(0); - th->pending_interrupt_queue_checked = 0; - th->pending_interrupt_mask_stack = rb_ary_tmp_new(0); - } + th->pending_interrupt_queue = rb_ary_hidden_new(0); + th->pending_interrupt_queue_checked = 0; + th->pending_interrupt_mask_stack = rb_ary_hidden_new(0); + } } rb_thread_create_timer_thread(); Init_thread_sync(); + + // TODO: Suppress unused function warning for now + // if (0) rb_thread_sched_destroy(NULL); } int @@ -5536,6 +5499,12 @@ ruby_native_thread_p(void) return th != 0; } +#ifdef NON_SCALAR_THREAD_ID + #define thread_id_str(th) (NULL) +#else + #define thread_id_str(th) ((void *)(uintptr_t)(th)->nt->thread_id) +#endif + static void debug_deadlock_check(rb_ractor_t *r, VALUE msg) { @@ -5543,13 +5512,13 @@ debug_deadlock_check(rb_ractor_t *r, VALUE msg) VALUE sep = rb_str_new_cstr("\n "); rb_str_catf(msg, "\n%d threads, %d sleeps current:%p main thread:%p\n", - rb_ractor_living_thread_num(r), rb_ractor_sleeper_thread_num(r), + rb_ractor_living_thread_num(r), rb_ractor_sleeper_thread_num(r), (void *)GET_THREAD(), (void *)r->threads.main); - list_for_each(&r->threads.set, th, lt_node) { + ccan_list_for_each(&r->threads.set, th, lt_node) { rb_str_catf(msg, "* %+"PRIsVALUE"\n rb_thread_t:%p " - "native:%"PRI_THREAD_ID" int:%u", - th->self, (void *)th, thread_id_str(th), th->ec->interrupt_flag); + "native:%p int:%u", + th->self, (void *)th, th->nt ? thread_id_str(th) : "N/A", th->ec->interrupt_flag); if (th->locking_mutex) { rb_mutex_t *mutex = mutex_ptr(th->locking_mutex); @@ -5575,22 +5544,26 @@ rb_check_deadlock(rb_ractor_t *r) { if (GET_THREAD()->vm->thread_ignore_deadlock) return; - int found = 0; - rb_thread_t *th = NULL; +#ifdef RUBY_THREAD_PTHREAD_H + if (r->threads.sched.readyq_cnt > 0) return; +#endif + int sleeper_num = rb_ractor_sleeper_thread_num(r); int ltnum = rb_ractor_living_thread_num(r); if (ltnum > sleeper_num) return; if (ltnum < sleeper_num) rb_bug("sleeper must not be more than vm_living_thread_num(vm)"); - if (patrol_thread && patrol_thread != GET_THREAD()) return; - list_for_each(&r->threads.set, th, lt_node) { + int found = 0; + rb_thread_t *th = NULL; + + ccan_list_for_each(&r->threads.set, th, lt_node) { if (th->status != THREAD_STOPPED_FOREVER || RUBY_VM_INTERRUPTED(th->ec)) { found = 1; } else if (th->locking_mutex) { rb_mutex_t *mutex = mutex_ptr(th->locking_mutex); - if (mutex->fiber == th->ec->fiber_ptr || (!mutex->fiber && !list_empty(&mutex->waitq))) { + if (mutex->fiber == th->ec->fiber_ptr || (!mutex->fiber && !ccan_list_empty(&mutex->waitq))) { found = 1; } } @@ -5599,42 +5572,57 @@ rb_check_deadlock(rb_ractor_t *r) } if (!found) { - VALUE argv[2]; - argv[0] = rb_eFatal; - argv[1] = rb_str_new2("No live threads left. Deadlock?"); - debug_deadlock_check(r, argv[1]); + VALUE argv[2]; + argv[0] = rb_eFatal; + argv[1] = rb_str_new2("No live threads left. Deadlock?"); + debug_deadlock_check(r, argv[1]); rb_ractor_sleeper_threads_dec(GET_RACTOR()); - rb_threadptr_raise(r->threads.main, 2, argv); + rb_threadptr_raise(r->threads.main, 2, argv); } } +// Used for VM memsize reporting. Returns the size of a list of waiting_fd +// structs. Defined here because the struct definition lives here as well. +size_t +rb_vm_memsize_waiting_fds(struct ccan_list_head *waiting_fds) +{ + struct waiting_fd *waitfd = 0; + size_t size = 0; + + ccan_list_for_each(waiting_fds, waitfd, wfd_node) { + size += sizeof(struct waiting_fd); + } + + return size; +} + static void update_line_coverage(VALUE data, const rb_trace_arg_t *trace_arg) { const rb_control_frame_t *cfp = GET_EC()->cfp; VALUE coverage = rb_iseq_coverage(cfp->iseq); if (RB_TYPE_P(coverage, T_ARRAY) && !RBASIC_CLASS(coverage)) { - VALUE lines = RARRAY_AREF(coverage, COVERAGE_INDEX_LINES); - if (lines) { - long line = rb_sourceline() - 1; - long count; - VALUE num; + VALUE lines = RARRAY_AREF(coverage, COVERAGE_INDEX_LINES); + if (lines) { + long line = rb_sourceline() - 1; + long count; + VALUE num; void rb_iseq_clear_event_flags(const rb_iseq_t *iseq, size_t pos, rb_event_flag_t reset); if (GET_VM()->coverage_mode & COVERAGE_TARGET_ONESHOT_LINES) { - rb_iseq_clear_event_flags(cfp->iseq, cfp->pc - cfp->iseq->body->iseq_encoded - 1, RUBY_EVENT_COVERAGE_LINE); + rb_iseq_clear_event_flags(cfp->iseq, cfp->pc - ISEQ_BODY(cfp->iseq)->iseq_encoded - 1, RUBY_EVENT_COVERAGE_LINE); rb_ary_push(lines, LONG2FIX(line + 1)); return; } - if (line >= RARRAY_LEN(lines)) { /* no longer tracked */ - return; - } - num = RARRAY_AREF(lines, line); - if (!FIXNUM_P(num)) return; - count = FIX2LONG(num) + 1; - if (POSFIXABLE(count)) { - RARRAY_ASET(lines, line, LONG2FIX(count)); - } - } + if (line >= RARRAY_LEN(lines)) { /* no longer tracked */ + return; + } + num = RARRAY_AREF(lines, line); + if (!FIXNUM_P(num)) return; + count = FIX2LONG(num) + 1; + if (POSFIXABLE(count)) { + RARRAY_ASET(lines, line, LONG2FIX(count)); + } + } } } @@ -5644,17 +5632,17 @@ update_branch_coverage(VALUE data, const rb_trace_arg_t *trace_arg) const rb_control_frame_t *cfp = GET_EC()->cfp; VALUE coverage = rb_iseq_coverage(cfp->iseq); if (RB_TYPE_P(coverage, T_ARRAY) && !RBASIC_CLASS(coverage)) { - VALUE branches = RARRAY_AREF(coverage, COVERAGE_INDEX_BRANCHES); - if (branches) { - long pc = cfp->pc - cfp->iseq->body->iseq_encoded - 1; + VALUE branches = RARRAY_AREF(coverage, COVERAGE_INDEX_BRANCHES); + if (branches) { + long pc = cfp->pc - ISEQ_BODY(cfp->iseq)->iseq_encoded - 1; long idx = FIX2INT(RARRAY_AREF(ISEQ_PC2BRANCHINDEX(cfp->iseq), pc)), count; - VALUE counters = RARRAY_AREF(branches, 1); - VALUE num = RARRAY_AREF(counters, idx); - count = FIX2LONG(num) + 1; - if (POSFIXABLE(count)) { - RARRAY_ASET(counters, idx, LONG2FIX(count)); - } - } + VALUE counters = RARRAY_AREF(branches, 1); + VALUE num = RARRAY_AREF(counters, idx); + count = FIX2LONG(num) + 1; + if (POSFIXABLE(count)) { + RARRAY_ASET(counters, idx, LONG2FIX(count)); + } + } } } @@ -5668,52 +5656,52 @@ rb_resolve_me_location(const rb_method_entry_t *me, VALUE resolved_location[5]) retry: switch (me->def->type) { case VM_METHOD_TYPE_ISEQ: { - const rb_iseq_t *iseq = me->def->body.iseq.iseqptr; - rb_iseq_location_t *loc = &iseq->body->location; - path = rb_iseq_path(iseq); - beg_pos_lineno = INT2FIX(loc->code_location.beg_pos.lineno); - beg_pos_column = INT2FIX(loc->code_location.beg_pos.column); - end_pos_lineno = INT2FIX(loc->code_location.end_pos.lineno); - end_pos_column = INT2FIX(loc->code_location.end_pos.column); - break; + const rb_iseq_t *iseq = me->def->body.iseq.iseqptr; + rb_iseq_location_t *loc = &ISEQ_BODY(iseq)->location; + path = rb_iseq_path(iseq); + beg_pos_lineno = INT2FIX(loc->code_location.beg_pos.lineno); + beg_pos_column = INT2FIX(loc->code_location.beg_pos.column); + end_pos_lineno = INT2FIX(loc->code_location.end_pos.lineno); + end_pos_column = INT2FIX(loc->code_location.end_pos.column); + break; } case VM_METHOD_TYPE_BMETHOD: { const rb_iseq_t *iseq = rb_proc_get_iseq(me->def->body.bmethod.proc, 0); - if (iseq) { - rb_iseq_location_t *loc; - rb_iseq_check(iseq); - path = rb_iseq_path(iseq); - loc = &iseq->body->location; - beg_pos_lineno = INT2FIX(loc->code_location.beg_pos.lineno); - beg_pos_column = INT2FIX(loc->code_location.beg_pos.column); - end_pos_lineno = INT2FIX(loc->code_location.end_pos.lineno); - end_pos_column = INT2FIX(loc->code_location.end_pos.column); - break; - } - return NULL; + if (iseq) { + rb_iseq_location_t *loc; + rb_iseq_check(iseq); + path = rb_iseq_path(iseq); + loc = &ISEQ_BODY(iseq)->location; + beg_pos_lineno = INT2FIX(loc->code_location.beg_pos.lineno); + beg_pos_column = INT2FIX(loc->code_location.beg_pos.column); + end_pos_lineno = INT2FIX(loc->code_location.end_pos.lineno); + end_pos_column = INT2FIX(loc->code_location.end_pos.column); + break; + } + return NULL; } case VM_METHOD_TYPE_ALIAS: - me = me->def->body.alias.original_me; - goto retry; + me = me->def->body.alias.original_me; + goto retry; case VM_METHOD_TYPE_REFINED: - me = me->def->body.refined.orig_me; - if (!me) return NULL; - goto retry; + me = me->def->body.refined.orig_me; + if (!me) return NULL; + goto retry; default: - return NULL; + return NULL; } /* found */ if (RB_TYPE_P(path, T_ARRAY)) { - path = rb_ary_entry(path, 1); - if (!RB_TYPE_P(path, T_STRING)) return NULL; /* just for the case... */ + path = rb_ary_entry(path, 1); + if (!RB_TYPE_P(path, T_STRING)) return NULL; /* just for the case... */ } if (resolved_location) { - resolved_location[0] = path; - resolved_location[1] = beg_pos_lineno; - resolved_location[2] = beg_pos_column; - resolved_location[3] = end_pos_lineno; - resolved_location[4] = end_pos_column; + resolved_location[0] = path; + resolved_location[1] = beg_pos_lineno; + resolved_location[2] = beg_pos_column; + resolved_location[3] = end_pos_lineno; + resolved_location[4] = end_pos_column; } return me; } @@ -5733,7 +5721,7 @@ update_method_coverage(VALUE me2counter, rb_trace_arg_t *trace_arg) rcount = rb_hash_aref(me2counter, (VALUE) me); count = FIXNUM_P(rcount) ? FIX2LONG(rcount) + 1 : 1; if (POSFIXABLE(count)) { - rb_hash_aset(me2counter, (VALUE) me, LONG2FIX(count)); + rb_hash_aset(me2counter, (VALUE) me, LONG2FIX(count)); } } @@ -5753,46 +5741,59 @@ void rb_set_coverages(VALUE coverages, int mode, VALUE me2counter) { GET_VM()->coverages = coverages; + GET_VM()->me2counter = me2counter; GET_VM()->coverage_mode = mode; +} + +void +rb_resume_coverages(void) +{ + int mode = GET_VM()->coverage_mode; + VALUE me2counter = GET_VM()->me2counter; rb_add_event_hook2((rb_event_hook_func_t) update_line_coverage, RUBY_EVENT_COVERAGE_LINE, Qnil, RUBY_EVENT_HOOK_FLAG_SAFE | RUBY_EVENT_HOOK_FLAG_RAW_ARG); if (mode & COVERAGE_TARGET_BRANCHES) { - rb_add_event_hook2((rb_event_hook_func_t) update_branch_coverage, RUBY_EVENT_COVERAGE_BRANCH, Qnil, RUBY_EVENT_HOOK_FLAG_SAFE | RUBY_EVENT_HOOK_FLAG_RAW_ARG); + rb_add_event_hook2((rb_event_hook_func_t) update_branch_coverage, RUBY_EVENT_COVERAGE_BRANCH, Qnil, RUBY_EVENT_HOOK_FLAG_SAFE | RUBY_EVENT_HOOK_FLAG_RAW_ARG); } if (mode & COVERAGE_TARGET_METHODS) { - rb_add_event_hook2((rb_event_hook_func_t) update_method_coverage, RUBY_EVENT_CALL, me2counter, RUBY_EVENT_HOOK_FLAG_SAFE | RUBY_EVENT_HOOK_FLAG_RAW_ARG); + rb_add_event_hook2((rb_event_hook_func_t) update_method_coverage, RUBY_EVENT_CALL, me2counter, RUBY_EVENT_HOOK_FLAG_SAFE | RUBY_EVENT_HOOK_FLAG_RAW_ARG); } } -/* Make coverage arrays empty so old covered files are no longer tracked. */ void -rb_reset_coverages(void) +rb_suspend_coverages(void) { - rb_clear_coverages(); - rb_iseq_remove_coverage_all(); - GET_VM()->coverages = Qfalse; rb_remove_event_hook((rb_event_hook_func_t) update_line_coverage); if (GET_VM()->coverage_mode & COVERAGE_TARGET_BRANCHES) { - rb_remove_event_hook((rb_event_hook_func_t) update_branch_coverage); + rb_remove_event_hook((rb_event_hook_func_t) update_branch_coverage); } if (GET_VM()->coverage_mode & COVERAGE_TARGET_METHODS) { - rb_remove_event_hook((rb_event_hook_func_t) update_method_coverage); + rb_remove_event_hook((rb_event_hook_func_t) update_method_coverage); } } +/* Make coverage arrays empty so old covered files are no longer tracked. */ +void +rb_reset_coverages(void) +{ + rb_clear_coverages(); + rb_iseq_remove_coverage_all(); + GET_VM()->coverages = Qfalse; +} + VALUE rb_default_coverage(int n) { - VALUE coverage = rb_ary_tmp_new_fill(3); + VALUE coverage = rb_ary_hidden_new_fill(3); VALUE lines = Qfalse, branches = Qfalse; int mode = GET_VM()->coverage_mode; if (mode & COVERAGE_TARGET_LINES) { - lines = n > 0 ? rb_ary_tmp_new_fill(n) : rb_ary_tmp_new(0); + lines = n > 0 ? rb_ary_hidden_new_fill(n) : rb_ary_hidden_new(0); } RARRAY_ASET(coverage, COVERAGE_INDEX_LINES, lines); if (mode & COVERAGE_TARGET_BRANCHES) { - branches = rb_ary_tmp_new_fill(2); + branches = rb_ary_hidden_new_fill(2); /* internal data structures for branch coverage: * * { branch base node => @@ -5816,9 +5817,9 @@ rb_default_coverage(int n) */ VALUE structure = rb_hash_new(); rb_obj_hide(structure); - RARRAY_ASET(branches, 0, structure); - /* branch execution counters */ - RARRAY_ASET(branches, 1, rb_ary_tmp_new(0)); + RARRAY_ASET(branches, 0, structure); + /* branch execution counters */ + RARRAY_ASET(branches, 1, rb_ary_hidden_new(0)); } RARRAY_ASET(coverage, COVERAGE_INDEX_BRANCHES, branches); @@ -5853,3 +5854,66 @@ rb_uninterruptible(VALUE (*b_proc)(VALUE), VALUE data) RUBY_VM_CHECK_INTS(cur_th->ec); return ret; } + +static void +thread_specific_storage_alloc(rb_thread_t *th) +{ + VM_ASSERT(th->specific_storage == NULL); + + if (UNLIKELY(specific_key_count > 0)) { + th->specific_storage = ZALLOC_N(void *, RB_INTERNAL_THREAD_SPECIFIC_KEY_MAX); + } +} + +rb_internal_thread_specific_key_t +rb_internal_thread_specific_key_create(void) +{ + rb_vm_t *vm = GET_VM(); + + if (specific_key_count == 0 && vm->ractor.cnt > 1) { + rb_raise(rb_eThreadError, "The first rb_internal_thread_specific_key_create() is called with multiple ractors"); + } + else if (specific_key_count > RB_INTERNAL_THREAD_SPECIFIC_KEY_MAX) { + rb_raise(rb_eThreadError, "rb_internal_thread_specific_key_create() is called more than %d times", RB_INTERNAL_THREAD_SPECIFIC_KEY_MAX); + } + else { + rb_internal_thread_specific_key_t key = specific_key_count++; + + if (key == 0) { + // allocate + rb_ractor_t *cr = GET_RACTOR(); + rb_thread_t *th; + + ccan_list_for_each(&cr->threads.set, th, lt_node) { + thread_specific_storage_alloc(th); + } + } + return key; + } +} + +// async and native thread safe. +void * +rb_internal_thread_specific_get(VALUE thread_val, rb_internal_thread_specific_key_t key) +{ + rb_thread_t *th = DATA_PTR(thread_val); + + VM_ASSERT(rb_thread_ptr(thread_val) == th); + VM_ASSERT(key < RB_INTERNAL_THREAD_SPECIFIC_KEY_MAX); + VM_ASSERT(th->specific_storage); + + return th->specific_storage[key]; +} + +// async and native thread safe. +void +rb_internal_thread_specific_set(VALUE thread_val, rb_internal_thread_specific_key_t key, void *data) +{ + rb_thread_t *th = DATA_PTR(thread_val); + + VM_ASSERT(rb_thread_ptr(thread_val) == th); + VM_ASSERT(key < RB_INTERNAL_THREAD_SPECIFIC_KEY_MAX); + VM_ASSERT(th->specific_storage); + + th->specific_storage[key] = data; +} |