diff options
Diffstat (limited to 'erts/emulator/beam/io.c')
| -rw-r--r-- | erts/emulator/beam/io.c | 4459 |
1 files changed, 3363 insertions, 1096 deletions
diff --git a/erts/emulator/beam/io.c b/erts/emulator/beam/io.c index 60b9238d38..e466f0e299 100644 --- a/erts/emulator/beam/io.c +++ b/erts/emulator/beam/io.c @@ -43,6 +43,8 @@ #include "erl_version.h" #include "error.h" #include "erl_async.h" +#define ERTS_WANT_EXTERNAL_TAGS +#include "external.h" #include "dtrace-wrapper.h" extern ErlDrvEntry fd_driver_entry; @@ -51,34 +53,40 @@ extern ErlDrvEntry spawn_driver_entry; extern ErlDrvEntry *driver_tab[]; /* table of static drivers, only used during initialization */ erts_driver_t *driver_list; /* List of all drivers, static and dynamic. */ -erts_smp_mtx_t erts_driver_list_lock; /* Mutex for driver list */ +erts_smp_rwmtx_t erts_driver_list_lock; /* Mutex for driver list */ static erts_smp_tsd_key_t driver_list_lock_status_key; /*stop recursive locks when calling driver init */ static erts_smp_tsd_key_t driver_list_last_error_key; /* Save last DDLL error on a per thread basis (for BC interfaces) */ -Port* erts_port; /* The port table */ +ErtsPTab erts_port erts_align_attribute(ERTS_CACHE_LINE_SIZE); /* The port table */ erts_smp_atomic_t erts_bytes_out; /* No bytes sent out of the system */ erts_smp_atomic_t erts_bytes_in; /* No bytes gotten into the system */ -Uint erts_max_ports; -Uint erts_port_tab_index_mask; - const ErlDrvTermData driver_term_nil = (ErlDrvTermData)NIL; +const Port erts_invalid_port = {{ERTS_INVALID_PORT}}; + erts_driver_t vanilla_driver; erts_driver_t spawn_driver; erts_driver_t fd_driver; +int erts_port_synchronous_ops = 0; +int erts_port_schedule_all_ops = 0; +int erts_port_parallelism = 0; + +static void deliver_result(Eterm sender, Eterm pid, Eterm res); static int init_driver(erts_driver_t *, ErlDrvEntry *, DE_Handle *); static void terminate_port(Port *p); static void pdl_init(void); #ifdef ERTS_SMP static void driver_monitor_lock_pdl(Port *p); static void driver_monitor_unlock_pdl(Port *p); +#define DRV_MONITOR_LOOKUP_PORT_LOCK_PDL(Port) erts_thr_drvport2port_raw((Port), 1) #define DRV_MONITOR_LOCK_PDL(Port) driver_monitor_lock_pdl(Port) #define DRV_MONITOR_UNLOCK_PDL(Port) driver_monitor_unlock_pdl(Port) #else +#define DRV_MONITOR_LOOKUP_PORT_LOCK_PDL(Port) erts_thr_drvport2port_raw((Port), 0) #define DRV_MONITOR_LOCK_PDL(Port) /* nothing */ #define DRV_MONITOR_UNLOCK_PDL(Port) /* nothing */ #endif @@ -89,36 +97,12 @@ static void driver_monitor_unlock_pdl(Port *p); static ERTS_INLINE ErlIOQueue* drvport2ioq(ErlDrvPort drvport) { - int ix = (int) drvport; - Uint32 status; - - if (ix < 0 || erts_max_ports <= ix) + Port *prt = erts_thr_drvport2port_raw(drvport, 0); + erts_aint32_t state = erts_atomic32_read_nob(&prt->state); + if (state & ERTS_PORT_SFLGS_INVALID_DRIVER_LOOKUP) return NULL; - - if (erts_get_scheduler_data()) { - ERTS_SMP_LC_ASSERT(erts_lc_is_port_locked(&erts_port[ix])); - ERTS_LC_ASSERT(!erts_port[ix].port_data_lock - || erts_lc_mtx_is_locked( - &erts_port[ix].port_data_lock->mtx)); - - status = erts_port[ix].status; - } - else { - erts_smp_port_state_lock(&erts_port[ix]); - status = erts_port[ix].status; - erts_smp_port_state_unlock(&erts_port[ix]); - - ERTS_LC_ASSERT((status & ERTS_PORT_SFLGS_INVALID_DRIVER_LOOKUP) - || erts_port[ix].port_data_lock); - ERTS_LC_ASSERT(!erts_port[ix].port_data_lock - || erts_lc_mtx_is_locked( - &erts_port[ix].port_data_lock->mtx)); - - } - - return ((status & ERTS_PORT_SFLGS_INVALID_DRIVER_LOOKUP) - ? NULL - : &erts_port[ix].ioq); + else + return &prt->ioq; } static ERTS_INLINE int @@ -196,27 +180,13 @@ typedef struct line_buf_context { dtrace_port_str((PORT), port_str); #endif -/* The 'number' field in a port now has two parts: the lowest bits - contain the index in the port table, and the higher bits are a counter - which is incremented each time we look for a free port and start from - the beginning of the table. erts_max_ports is the number of file descriptors, - rounded up to a power of 2. - To get the index from a port, use the macro 'internal_port_index'; - 'port_number' returns the whole number field. -*/ - -static erts_smp_spinlock_t get_free_port_lck; -static Uint last_port_num; -static Uint port_num_mask; -erts_smp_atomic32_t erts_ports_snapshot; /* Identifies the _next_ snapshot (not the ongoing) */ - - static ERTS_INLINE void kill_port(Port *pp) { ERTS_SMP_LC_ASSERT(erts_lc_is_port_locked(pp)); + erts_ptab_delete_element(&erts_port, &pp->common); /* Time of death */ erts_port_task_free_port(pp); - ASSERT(pp->status & ERTS_PORT_SFLGS_DEAD); + /* In non-smp case the port structure may have been deallocated now */ } #ifdef ERTS_SMP @@ -227,146 +197,280 @@ erts_lc_is_port_locked(Port *prt) { if (!prt) return 0; + ERTS_SMP_LC_ASSERT(prt->lock); return erts_smp_lc_mtx_is_locked(prt->lock); } #endif #endif /* #ifdef ERTS_SMP */ -static int -get_free_port(void) -{ - Uint num; - Uint tries = erts_max_ports; - Port* port; +static void initq(Port* prt); - erts_smp_spin_lock(&get_free_port_lck); - num = last_port_num + 1; - for (;; ++num) { - port = &erts_port[num & erts_port_tab_index_mask]; +#if defined(ERTS_ENABLE_LOCK_CHECK) || defined(ERTS_ENABLE_LOCK_COUNT) +#define ERTS_PORT_INIT_INSTR_NEED_ID 1 +#else +#define ERTS_PORT_INIT_INSTR_NEED_ID 0 +#endif - erts_smp_port_state_lock(port); - if (port->status & ERTS_PORT_SFLG_FREE) { - last_port_num = num; - erts_smp_spin_unlock(&get_free_port_lck); - break; - } - erts_smp_port_state_unlock(port); +static ERTS_INLINE void port_init_instr(Port *prt +#if ERTS_PORT_INIT_INSTR_NEED_ID + , Eterm id +#endif + ) +{ +#if !ERTS_PORT_INIT_INSTR_NEED_ID + Eterm id = NIL; /* Not used */ +#endif - if (--tries == 0) { - erts_smp_spin_unlock(&get_free_port_lck); - return -1; - } + /* + * Stuff that need to be initialized with the port id + * in the instrumented case, but not in the normal case. + */ +#ifdef ERTS_SMP + ASSERT(prt->drv_ptr && prt->lock); + if (!prt->drv_ptr->lock) { + char *lock_str = "port_lock"; +#ifdef ERTS_ENABLE_LOCK_COUNT + if (!(erts_lcnt_rt_options & ERTS_LCNT_OPT_PORTLOCK)) + lock_str = NULL; +#endif + erts_mtx_init_locked_x(prt->lock, lock_str, id); } - port->status = ERTS_PORT_SFLG_INITIALIZING; - ERTS_LC_ASSERT(erts_smp_atomic_read_nob(&port->refc) == 0); - erts_smp_atomic_set_nob(&port->refc, 2); /* Port alive + lock */ - erts_smp_port_state_unlock(port); - return num & port_num_mask; +#endif + erts_port_task_init_sched(&prt->sched, id); } -/* - * erts_test_next_port() is only used for testing. - */ -Sint -erts_test_next_port(int set, Uint next) +#if !ERTS_PORT_INIT_INSTR_NEED_ID +static ERTS_INLINE void port_init_instr_abort(Port *prt) { - Uint i, num; - Sint res = -1; - - erts_smp_spin_lock(&get_free_port_lck); - if (set) { - last_port_num = (next - 1) & port_num_mask; +#ifdef ERTS_SMP + ASSERT(prt->drv_ptr && prt->lock); + if (!prt->drv_ptr->lock) { + erts_mtx_unlock(prt->lock); + erts_mtx_destroy(prt->lock); } - num = last_port_num + 1; +#endif + erts_port_task_fini_sched(&prt->sched); +} +#endif - for (i=0; i < erts_max_ports && res<0; ++i, ++num) { - - Port* port = &erts_port[num & erts_port_tab_index_mask]; +static void insert_port_struct(void *vprt, Eterm data) +{ + Port *prt = (Port *) vprt; + Eterm id = make_internal_port(data); +#if ERTS_PORT_INIT_INSTR_NEED_ID + /* + * This cannot be done earlier in the instrumented + * case since we don't now 'id' until now. + */ + port_init_instr(prt, id); +#endif + prt->common.id = id; + erts_atomic32_init_relb(&prt->state, ERTS_PORT_SFLG_INITIALIZING); +} - erts_smp_port_state_lock(port); +#define ERTS_CREATE_PORT_FLAG_PARALLELISM (1 << 0) - if (port->status & ERTS_PORT_SFLG_FREE) { - last_port_num = num - 1; - res = num & port_num_mask; - } - erts_smp_port_state_unlock(port); +static Port *create_port(char *name, + erts_driver_t *driver, + erts_mtx_t *driver_lock, + int create_flags, + Eterm pid, + int *enop) +{ + ErtsPortTaskBusyPortQ *busy_port_queue; + Port *prt; + char *p; + size_t port_size, busy_port_queue_size, size; + erts_aint32_t state = ERTS_PORT_SFLG_CONNECTED; + erts_aint32_t x_pts_flgs = 0; +#ifdef DEBUG + /* Make sure the debug flags survives until port is freed */ + state |= ERTS_PORT_SFLG_PORT_DEBUG; +#endif + +#ifdef ERTS_SMP + if (!driver_lock) { + /* Align size for mutex following port struct */ + port_size = size = ERTS_ALC_DATA_ALIGN_SIZE(sizeof(Port)); + size += sizeof(erts_mtx_t); } - erts_smp_spin_unlock(&get_free_port_lck); - return res; -} + else +#endif + port_size = size = ERTS_ALC_DATA_ALIGN_SIZE(sizeof(Port)); + busy_port_queue_size + = ((driver->flags & ERL_DRV_FLAG_NO_BUSY_MSGQ) + ? 0 + : ERTS_ALC_DATA_ALIGN_SIZE(sizeof(ErtsPortTaskBusyPortQ))); + size += busy_port_queue_size; -static void port_cleanup(Port *prt); + size += sys_strlen(name) + 1; -#ifdef ERTS_SMP + p = erts_alloc_fnf(ERTS_ALC_T_PORT, size); + if (!p) { + if (enop) + *enop = ENOMEM; + return NULL; + } -static void -sched_port_cleanup(void *vprt) -{ - Port *prt = (Port *) vprt; - erts_smp_mtx_lock(prt->lock); - port_cleanup(prt); -} + prt = (Port *) p; + p += port_size; -#endif + if (!busy_port_queue_size) + busy_port_queue = NULL; + else { + busy_port_queue = (ErtsPortTaskBusyPortQ *) p; + p += busy_port_queue_size; + } -void -erts_port_cleanup(Port *prt) -{ #ifdef ERTS_SMP - if (erts_smp_mtx_trylock(prt->lock) == EBUSY) - erts_schedule_misc_op(sched_port_cleanup, (void *) prt); - else + if (driver_lock) { + prt->lock = driver_lock; + erts_mtx_lock(driver_lock); + } + else { + prt->lock = (erts_mtx_t *) p; + p += sizeof(erts_mtx_t); + state |= ERTS_PORT_SFLG_PORT_SPECIFIC_LOCK; + } + erts_smp_atomic_set_nob(&prt->run_queue, + (erts_aint_t) erts_get_runq_current(NULL)); + prt->xports = NULL; +#else + erts_atomic32_init_nob(&prt->refc, 1); + prt->cleanup = 0; #endif - port_cleanup(prt); -} + + erts_port_task_pre_init_sched(&prt->sched, busy_port_queue); -void -port_cleanup(Port *prt) -{ + prt->name = p; + sys_strcpy(p, name); + prt->drv_ptr = driver; + ERTS_P_LINKS(prt) = NULL; + ERTS_P_MONITORS(prt) = NULL; + prt->linebuf = NULL; + prt->bp = NULL; + prt->suspended = NULL; + prt->data = am_undefined; + prt->port_data_lock = NULL; + prt->control_flags = 0; + prt->bytes_in = 0; + prt->bytes_out = 0; + prt->dist_entry = NULL; + ERTS_PORT_INIT_CONNECTED(prt, pid); + prt->common.u.alive.reg = NULL; #ifdef ERTS_SMP - Uint32 port_specific; - erts_smp_mtx_t *mtx; + prt->common.u.alive.ptimer = NULL; +#else + sys_memset(&prt->common.u.alive.tm, 0, sizeof(ErlTimer)); #endif - erts_driver_t *driver; + erts_port_task_handle_init(&prt->timeout_task); + prt->psd = NULL; + prt->drv_data = (SWord) 0; + prt->os_pid = -1; - erts_smp_port_state_lock(prt); + /* Set default tracing */ + erts_get_default_tracing(&ERTS_TRACE_FLAGS(prt), &ERTS_TRACER_PROC(prt)); - ERTS_SMP_LC_ASSERT(erts_lc_is_port_locked(prt)); - driver = prt->drv_ptr; - prt->drv_ptr = NULL; - ASSERT(driver); + ASSERT(((char *) prt) == ((char *) &prt->common)); - ASSERT(prt->status & ERTS_PORT_SFLG_FREE_SCHEDULED); - ERTS_LC_ASSERT(erts_smp_atomic_read_nob(&prt->refc) == 0); +#if !ERTS_PORT_INIT_INSTR_NEED_ID + /* + * When 'id' isn't needed (the normal case), it is better to + * do the initialization here avoiding unnecessary contention + * on table... + */ + port_init_instr(prt); +#endif - ASSERT(prt->status & ERTS_PORT_SFLG_PORT_DEBUG); - ASSERT(!(prt->status & ERTS_PORT_SFLG_FREE)); - prt->status = ERTS_PORT_SFLG_FREE; + if (!erts_ptab_new_element(&erts_port, + &prt->common, + (void *) prt, + insert_port_struct)) { +#if !ERTS_PORT_INIT_INSTR_NEED_ID + port_init_instr_abort(prt); +#endif #ifdef ERTS_SMP + if (driver_lock) + erts_mtx_unlock(driver_lock); +#endif + if (enop) + *enop = 0; + return NULL; + } - port_specific = (prt->status & ERTS_PORT_SFLG_PORT_SPECIFIC_LOCK); + ASSERT(prt == (Port *) (erts_ptab_pix2intptr_nob( + &erts_port, + internal_port_index(prt->common.id)))); - mtx = prt->lock; - ASSERT(mtx); + initq(prt); - prt->lock = NULL; + ERTS_SMP_LC_ASSERT(erts_lc_is_port_locked(prt)); - erts_smp_port_state_unlock(prt); - erts_smp_mtx_unlock(mtx); + if (erts_port_schedule_all_ops) + x_pts_flgs |= ERTS_PTS_FLG_FORCE_SCHED; - if (port_specific) { - erts_smp_mtx_destroy(mtx); - erts_free(ERTS_ALC_T_PORT_LOCK, mtx); - } -#endif + if (create_flags & ERTS_CREATE_PORT_FLAG_PARALLELISM) + x_pts_flgs |= ERTS_PTS_FLG_PARALLELISM; - if (driver->handle) - erts_ddll_dereference_driver(driver->handle); + if (x_pts_flgs) + erts_smp_atomic32_read_bor_nob(&prt->sched.flags, x_pts_flgs); + + erts_atomic32_set_relb(&prt->state, state); + return prt; +} + +#ifndef ERTS_SMP +void +erts_port_cleanup(Port *prt) +{ + if (prt->drv_ptr && prt->drv_ptr->handle) + erts_ddll_dereference_driver(prt->drv_ptr->handle); + prt->drv_ptr = NULL; + erts_port_dec_refc(prt); } +#endif +void +erts_port_free(Port *prt) +{ +#if defined(ERTS_SMP) || defined(DEBUG) || defined(ERTS_ENABLE_LOCK_CHECK) + erts_aint32_t state = erts_atomic32_read_nob(&prt->state); +#endif + ERTS_LC_ASSERT(state & (ERTS_PORT_SFLG_INITIALIZING + | ERTS_PORT_SFLG_FREE)); + ASSERT(state & ERTS_PORT_SFLG_PORT_DEBUG); + +#ifdef ERTS_SMP + ERTS_LC_ASSERT(erts_atomic32_read_nob(&prt->common.refc) == 0); +#else + ERTS_LC_ASSERT(erts_atomic32_read_nob(&prt->refc) == 0); +#endif + + erts_port_task_fini_sched(&prt->sched); + +#ifdef ERTS_SMP + ASSERT(prt->lock); + if (state & ERTS_PORT_SFLG_PORT_SPECIFIC_LOCK) + erts_mtx_destroy(prt->lock); + + /* + * We cannot dereference a driver using driver + * locking until here in smp case. Otherwise, + * the driver lock may still be in use by others. + * + * In the non-smp case we cannot do it here since + * this function may be called by non-scheduler + * threads. This is done in erts_port_cleanup() + * in the non-smp case. + */ + if (prt->drv_ptr->handle) + erts_ddll_dereference_driver(prt->drv_ptr->handle); +#endif + erts_free(ERTS_ALC_T_PORT, prt); +} /* ** Initialize v_start to point to the small fixed vector. @@ -414,94 +518,21 @@ static void stopq(Port* prt) if (prt->port_data_lock) { driver_pdl_unlock(prt->port_data_lock); driver_pdl_dec_refc(prt->port_data_lock); - prt->port_data_lock = NULL; - } -} - - - -static void -setup_port(Port* prt, Eterm pid, erts_driver_t *driver, - ErlDrvData drv_data, char *name, Uint32 xstatus) -{ - ErtsRunQueue *runq = erts_get_runq_current(NULL); - char *new_name, *old_name; -#ifdef DEBUG - /* Make sure the debug flags survives until port is freed */ - xstatus |= ERTS_PORT_SFLG_PORT_DEBUG; -#endif - ASSERT(runq); - ERTS_SMP_LC_ASSERT(erts_lc_is_port_locked(prt)); - - - new_name = (char*) erts_alloc(ERTS_ALC_T_PORT_NAME, sys_strlen(name)+1); - sys_strcpy(new_name, name); - erts_smp_runq_lock(runq); - erts_smp_port_state_lock(prt); - prt->os_pid = -1; - prt->status = ERTS_PORT_SFLG_CONNECTED | xstatus; - prt->snapshot = erts_smp_atomic32_read_nob(&erts_ports_snapshot); - old_name = prt->name; - prt->name = new_name; -#ifdef ERTS_SMP - erts_smp_atomic_set_nob(&prt->run_queue, (erts_aint_t) runq); -#endif - ASSERT(!prt->drv_ptr); - prt->drv_ptr = driver; - erts_smp_port_state_unlock(prt); - erts_smp_runq_unlock(runq); -#ifdef ERTS_SMP - ASSERT(!prt->xports); -#endif - if (old_name) { - erts_free(ERTS_ALC_T_PORT_NAME, (void *) old_name); } - - prt->control_flags = 0; - prt->connected = pid; - prt->drv_data = (SWord) drv_data; - prt->bytes_in = 0; - prt->bytes_out = 0; - prt->dist_entry = NULL; - prt->reg = NULL; -#ifdef ERTS_SMP - prt->ptimer = NULL; -#else - sys_memset(&prt->tm, 0, sizeof(ErlTimer)); -#endif - erts_port_task_handle_init(&prt->timeout_task); - prt->suspended = NULL; - sys_strcpy(prt->name, name); - prt->nlinks = NULL; - prt->monitors = NULL; - prt->linebuf = NULL; - prt->bp = NULL; - prt->data = am_undefined; - /* Set default tracing */ - erts_get_default_tracing(&(prt->trace_flags), &(prt->tracer_proc)); - - prt->psd = NULL; - - initq(prt); } -void -erts_wake_process_later(Port *prt, Process *process) +int +erts_save_suspend_process_on_port(Port *prt, Process *process) { - ErtsProcList** p; - ErtsProcList* new_p; - - ERTS_SMP_LC_ASSERT(erts_lc_is_port_locked(prt)); - - if (prt->status & ERTS_PORT_SFLGS_DEAD) - return; - - for (p = &(prt->suspended); *p != NULL; p = &((*p)->next)) - /* Empty loop body */; - - new_p = erts_proclist_create(process); - new_p->next = NULL; - *p = new_p; + int saved; + erts_aint32_t flags; + erts_port_task_sched_lock(&prt->sched); + flags = erts_smp_atomic32_read_nob(&prt->sched.flags); + saved = (flags & ERTS_PTS_FLGS_BUSY) && !(flags & ERTS_PTS_FLG_EXIT); + if (saved) + erts_proclist_store_last(&prt->suspended, erts_proclist_create(process)); + erts_port_task_sched_unlock(&prt->sched); + return saved; } /* @@ -513,47 +544,44 @@ erts_wake_process_later(Port *prt, Process *process) (*error_number_ptr must contain either BADARG or SYSTEM_LIMIT). The driver start function must obey the same conventions. */ -int +Port * erts_open_driver(erts_driver_t* driver, /* Pointer to driver. */ Eterm pid, /* Current process. */ char* name, /* Driver name. */ SysDriverOpts* opts, /* Options. */ - int *error_number_ptr) /* errno in case -2 is returned */ + int *error_type_ptr, /* error type */ + int *error_number_ptr) /* errno in case of error type -2 */ { - int port_num; - int port_ix; + +#undef ERTS_OPEN_DRIVER_RET +#define ERTS_OPEN_DRIVER_RET(Prt, EType, ENo) \ + do { \ + if (error_type_ptr) \ + *error_type_ptr = (EType); \ + if (error_number_ptr) \ + *error_number_ptr = (ENo); \ + return (Prt); \ + } while (0) + ErlDrvData drv_data = 0; - Uint32 xstatus = 0; Port *port; int fpe_was_unmasked; - - if (error_number_ptr) - *error_number_ptr = 0; + int error_type, error_number; + int port_errno = 0; + erts_mtx_t *driver_lock = NULL; + int cprt_flgs = 0; ERTS_SMP_CHK_NO_PROC_LOCKS; - if ((port_num = get_free_port()) < 0) { - if (error_number_ptr) { - *error_number_ptr = SYSTEM_LIMIT; - } - return -3; - } - - port_ix = port_num & erts_port_tab_index_mask; - port = &erts_port[port_ix]; - port->id = make_internal_port(port_num); - - erts_smp_mtx_lock(&erts_driver_list_lock); + erts_smp_rwmtx_rlock(&erts_driver_list_lock); if (!driver) { for (driver = driver_list; driver; driver = driver->next) { if (sys_strcmp(driver->name, name) == 0) break; } if (!driver) { - erts_smp_mtx_unlock(&erts_driver_list_lock); - if (error_number_ptr) - *error_number_ptr = BADARG; - return -3; + erts_smp_rwmtx_runlock(&erts_driver_list_lock); + ERTS_OPEN_DRIVER_RET(NULL, -3, BADARG); } } if (driver == &spawn_driver) { @@ -597,59 +625,49 @@ erts_open_driver(erts_driver_t* driver, /* Pointer to driver. */ } if (driver == NULL || (driver != &spawn_driver && opts->exit_status)) { - erts_smp_mtx_unlock(&erts_driver_list_lock); - if (error_number_ptr) { - *error_number_ptr = BADARG; - } - /* Need to mark the port as free again */ - erts_smp_port_state_lock(port); - port->status = ERTS_PORT_SFLG_FREE; - ERTS_LC_ASSERT(erts_smp_atomic_read_nob(&port->refc) == 2); - erts_smp_atomic_set_nob(&port->refc, 0); - erts_smp_port_state_unlock(port); - return -3; + erts_smp_rwmtx_runlock(&erts_driver_list_lock); + ERTS_OPEN_DRIVER_RET(NULL, -3, BADARG); } - /* - * We'll set up the port before calling the start function, - * to allow message sending and setting timers in the start function. - */ - #ifdef ERTS_SMP - ASSERT(!port->lock); - port->lock = driver->lock; - if (!port->lock) { - port->lock = erts_alloc(ERTS_ALC_T_PORT_LOCK, - sizeof(erts_smp_mtx_t)); - erts_smp_mtx_init_x(port->lock, -#ifdef ERTS_ENABLE_LOCK_COUNT - (erts_lcnt_rt_options & ERTS_LCNT_OPT_PORTLOCK) ? "port_lock" : NULL, -#else - "port_lock", -#endif - port->id); - xstatus |= ERTS_PORT_SFLG_PORT_SPECIFIC_LOCK; - } + driver_lock = driver->lock; #endif if (driver->handle != NULL) { erts_ddll_increment_port_count(driver->handle); erts_ddll_reference_driver(driver->handle); } - erts_smp_mtx_unlock(&erts_driver_list_lock); + erts_smp_rwmtx_runlock(&erts_driver_list_lock); -#ifdef ERTS_SMP - erts_smp_mtx_lock(port->lock); -#endif + /* + * We'll set up the port before calling the start function, + * to allow message sending and setting timers in the start function. + */ + + if (opts->parallelism) + cprt_flgs |= ERTS_CREATE_PORT_FLAG_PARALLELISM; - setup_port(port, pid, driver, drv_data, name, xstatus); + port = create_port(name, driver, driver_lock, cprt_flgs, pid, &port_errno); + if (!port) { + if (driver->handle) { + erts_smp_rwmtx_rlock(&erts_driver_list_lock); + erts_ddll_decrement_port_count(driver->handle); + erts_smp_rwmtx_runlock(&erts_driver_list_lock); + erts_ddll_dereference_driver(driver->handle); + } + if (port_errno) + ERTS_OPEN_DRIVER_RET(NULL, -2, port_errno); + else + ERTS_OPEN_DRIVER_RET(NULL, -3, SYSTEM_LIMIT); + } if (IS_TRACED_FL(port, F_TRACE_PORTS)) { trace_port_open(port, pid, am_atom_put(port->name, strlen(port->name))); } - + + error_number = error_type = 0; if (driver->start) { if (IS_TRACED_FL(port, F_TRACE_SCHED_PORTS)) { trace_sched_ports_where(port, am_in, am_start); @@ -662,56 +680,63 @@ erts_open_driver(erts_driver_t* driver, /* Pointer to driver. */ } #endif fpe_was_unmasked = erts_block_fpe(); - drv_data = (*driver->start)((ErlDrvPort)(port_ix), - name, opts); + drv_data = (*driver->start)((ErlDrvPort) port, name, opts); + if (((SWord) drv_data) == -1) + error_type = -1; + else if (((SWord) drv_data) == -2) { + /* + * We need to save errno quickly after the + * call to the 'start' callback before + * something else modify it. + */ + error_type = -2; + error_number = errno; + } + else if (((SWord) drv_data) == -3) { + error_type = -3; + error_number = BADARG; + } + erts_unblock_fpe(fpe_was_unmasked); port->caller = NIL; if (IS_TRACED_FL(port, F_TRACE_SCHED_PORTS)) { trace_sched_ports_where(port, am_out, am_start); } - if (error_number_ptr && ((SWord) drv_data) == (SWord) -2) - *error_number_ptr = errno; #ifdef ERTS_SMP if (port->xports) - erts_smp_xports_unlock(port); + erts_port_handle_xports(port); ASSERT(!port->xports); #endif } - if (((SWord)drv_data) == -1 || - ((SWord)drv_data) == -2 || - ((SWord)drv_data) == -3) { - int res = (int) ((SWord) drv_data); - - if (res == -3 && error_number_ptr) { - *error_number_ptr = BADARG; - } - + if (error_type) { /* * Must clean up the port. */ #ifdef ERTS_SMP - erts_cancel_smp_ptimer(port->ptimer); + erts_cancel_smp_ptimer(port->common.u.alive.ptimer); #else - erts_cancel_timer(&(port->tm)); + erts_cancel_timer(&(port->common.u.alive.tm)); #endif stopq(port); - kill_port(port); if (port->linebuf != NULL) { erts_free(ERTS_ALC_T_LINEBUF, (void *) port->linebuf); port->linebuf = NULL; } if (driver->handle != NULL) { - erts_smp_mtx_lock(&erts_driver_list_lock); + erts_smp_rwmtx_rlock(&erts_driver_list_lock); erts_ddll_decrement_port_count(driver->handle); - erts_smp_mtx_unlock(&erts_driver_list_lock); + erts_smp_rwmtx_runlock(&erts_driver_list_lock); } + kill_port(port); erts_port_release(port); - return res; + ERTS_OPEN_DRIVER_RET(NULL, error_type, error_number); } - port->drv_data = (SWord) drv_data; - return port_ix; + port->drv_data = (UWord) drv_data; + ERTS_OPEN_DRIVER_RET(port, 0, 0); + +#undef ERTS_OPEN_DRIVER_RET } #ifdef ERTS_SMP @@ -736,102 +761,122 @@ driver_create_port(ErlDrvPort creator_port_ix, /* Creating port */ char* name, /* Driver name */ ErlDrvData drv_data) /* Driver data */ { + int cprt_flgs = 0; Port *creator_port; Port* port; erts_driver_t *driver; Process *rp; - int port_num; - Eterm port_id; - Uint32 xstatus = 0; + erts_mtx_t *driver_lock = NULL; ERTS_SMP_CHK_NO_PROC_LOCKS; - creator_port = erts_drvport2port(creator_port_ix); + /* Need to be called from a scheduler thread */ + if (!erts_get_scheduler_id()) + return ERTS_INVALID_ERL_DRV_PORT; + + creator_port = erts_drvport2port(creator_port_ix, NULL); if (!creator_port) - return (ErlDrvTermData) -1; + return ERTS_INVALID_ERL_DRV_PORT; + + rp = erts_proc_lookup(pid); + if (!rp) + return ERTS_INVALID_ERL_DRV_PORT; ERTS_SMP_LC_ASSERT(erts_lc_is_port_locked(creator_port)); driver = creator_port->drv_ptr; - erts_smp_mtx_lock(&erts_driver_list_lock); + erts_smp_rwmtx_rlock(&erts_driver_list_lock); if (!erts_ddll_driver_ok(driver->handle)) { - erts_smp_mtx_unlock(&erts_driver_list_lock); - return (ErlDrvTermData) -1; + erts_smp_rwmtx_runlock(&erts_driver_list_lock); + return ERTS_INVALID_ERL_DRV_PORT; } - rp = erts_pid2proc(NULL, 0, pid, ERTS_PROC_LOCK_LINK); - if (!rp) { - erts_smp_mtx_unlock(&erts_driver_list_lock); - return (ErlDrvTermData) -1; /* pid does not exist */ + if (driver->handle != NULL) { + erts_ddll_increment_port_count(driver->handle); + erts_ddll_reference_referenced_driver(driver->handle); + } + +#ifdef ERTS_SMP + driver_lock = driver->lock; +#endif + + erts_smp_rwmtx_runlock(&erts_driver_list_lock); + + /* Inherit parallelism flag from parent */ + if (ERTS_PTS_FLG_PARALLELISM & + erts_smp_atomic32_read_nob(&creator_port->sched.flags)) + cprt_flgs |= ERTS_CREATE_PORT_FLAG_PARALLELISM; + port = create_port(name, driver, driver_lock, cprt_flgs, pid, NULL); + if (!port) { + if (driver->handle) { + erts_smp_rwmtx_rlock(&erts_driver_list_lock); + erts_ddll_decrement_port_count(driver->handle); + erts_smp_rwmtx_runlock(&erts_driver_list_lock); + erts_ddll_dereference_driver(driver->handle); + } + return ERTS_INVALID_ERL_DRV_PORT; } - if ((port_num = get_free_port()) < 0) { - errno = SYSTEM_LIMIT; + ERTS_SMP_LC_ASSERT(erts_lc_is_port_locked(port)); + + erts_smp_proc_lock(rp, ERTS_PROC_LOCK_LINK); + if (ERTS_PROC_IS_EXITING(rp)) { erts_smp_proc_unlock(rp, ERTS_PROC_LOCK_LINK); - erts_smp_mtx_unlock(&erts_driver_list_lock); - return (ErlDrvTermData) -1; + if (driver->handle) { + erts_smp_rwmtx_rlock(&erts_driver_list_lock); + erts_ddll_decrement_port_count(driver->handle); + erts_smp_rwmtx_runlock(&erts_driver_list_lock); + } + kill_port(port); + erts_port_release(port); + return ERTS_INVALID_ERL_DRV_PORT; } - port_id = make_internal_port(port_num); - port = &erts_port[port_num & erts_port_tab_index_mask]; + erts_add_link(&ERTS_P_LINKS(port), LINK_PID, pid); + erts_add_link(&ERTS_P_LINKS(rp), LINK_PID, port->common.id); + erts_smp_proc_unlock(rp, ERTS_PROC_LOCK_LINK); #ifdef ERTS_SMP - ASSERT(!port->lock); - port->lock = driver->lock; - if (!port->lock) { + if (!driver_lock) { ErtsXPortsList *xplp = xports_list_alloc(); xplp->port = port; xplp->next = creator_port->xports; creator_port->xports = xplp; - port->lock = erts_alloc(ERTS_ALC_T_PORT_LOCK, - sizeof(erts_smp_mtx_t)); - erts_smp_mtx_init_locked_x(port->lock, -#ifdef ERTS_ENABLE_LOCK_COUNT - (erts_lcnt_rt_options & ERTS_LCNT_OPT_PORTLOCK) ? "port_lock" : NULL, -#else - "port_lock", -#endif - port_id); - xstatus |= ERTS_PORT_SFLG_PORT_SPECIFIC_LOCK; } - #endif - if (driver->handle != NULL) { - erts_ddll_increment_port_count(driver->handle); - erts_ddll_reference_referenced_driver(driver->handle); - } - erts_smp_mtx_unlock(&erts_driver_list_lock); - - ERTS_SMP_LC_ASSERT(erts_lc_is_port_locked(port)); + port->drv_data = (UWord) drv_data; - setup_port(port, pid, driver, drv_data, name, xstatus); - port->id = port_id; - - erts_add_link(&(port->nlinks), LINK_PID, pid); - erts_add_link(&(rp->nlinks), LINK_PID, port_id); - erts_smp_proc_unlock(rp, ERTS_PROC_LOCK_LINK); - return port_num & erts_port_tab_index_mask; + return (ErlDrvPort) port; } #ifdef ERTS_SMP -void -erts_smp_xports_unlock(Port *prt) +int erts_port_handle_xports(Port *prt) { + int reds = 0; ErtsXPortsList *xplp; ASSERT(prt); xplp = prt->xports; ASSERT(xplp); while (xplp) { + Port *rprt = xplp->port; ErtsXPortsList *free_xplp; - if (xplp->port->xports) - erts_smp_xports_unlock(xplp->port); - erts_port_release(xplp->port); + erts_aint32_t state; + if (rprt->xports) + reds += erts_port_handle_xports(rprt); + state = erts_atomic32_read_nob(&rprt->state); + if ((state & ERTS_PORT_SFLG_CLOSING) && erts_is_port_ioq_empty(rprt)) { + terminate_port(rprt); + reds += ERTS_PORT_REDS_TERMINATE; + } + erts_port_release(rprt); free_xplp = xplp; xplp = xplp->next; xports_list_free(free_xplp); + reds++; } prt->xports = NULL; + return reds; } #endif @@ -866,8 +911,8 @@ io_list_to_vec(Eterm obj, /* io-list */ DECLARE_ESTACK(s); Eterm* objp; char *buf = cbin->orig_bytes; - ErlDrvSizeT len = cbin->orig_size; - ErlDrvSizeT csize = 0; + Uint len = cbin->orig_size; + Uint csize = 0; int vlen = 0; char* cptr = buf; @@ -982,7 +1027,7 @@ io_list_to_vec(Eterm obj, /* io-list */ #define IO_LIST_VEC_COUNT(obj) \ do { \ - ErlDrvSizeT _size = binary_size(obj); \ + Uint _size = binary_size(obj); \ Eterm _real; \ ERTS_DECLARE_DUMMY(Uint _offset); \ int _bitoffs; \ @@ -1033,8 +1078,9 @@ do { \ */ static int -io_list_vec_len(Eterm obj, Uint* vsize, Uint* csize, - Uint* pvsize, Uint* pcsize, Uint* total_size) +io_list_vec_len(Eterm obj, int* vsize, Uint* csize, + Uint* pvsize, Uint* pcsize, + ErlDrvSizeT* total_size) { DECLARE_ESTACK(s); Eterm* objp; @@ -1045,7 +1091,7 @@ io_list_vec_len(Eterm obj, Uint* vsize, Uint* csize, Uint p_v_size = 0; Uint p_c_size = 0; Uint p_in_clist = 0; - Uint total; + Uint total; /* Uint due to halfword emulator */ goto L_jump_start; /* avoid a push */ @@ -1105,7 +1151,7 @@ io_list_vec_len(Eterm obj, Uint* vsize, Uint* csize, if (total < c_size) { goto L_overflow_error; } - *total_size = total; + *total_size = (ErlDrvSizeT) total; DESTROY_ESTACK(s); *vsize = v_size; @@ -1120,56 +1166,724 @@ io_list_vec_len(Eterm obj, Uint* vsize, Uint* csize, return 1; } -/* write data to a port */ -int erts_write_to_port(Eterm caller_id, Port *p, Eterm list) -{ - char *buf; - erts_driver_t *drv = p->drv_ptr; - Uint size; +typedef enum { + ERTS_TRY_IMM_DRV_CALL_OK, + ERTS_TRY_IMM_DRV_CALL_BUSY_LOCK, + ERTS_TRY_IMM_DRV_CALL_INVALID_PORT, + ERTS_TRY_IMM_DRV_CALL_INVALID_SCHED_FLAGS +} ErtsTryImmDrvCallResult; + +typedef struct { + Process *c_p; /* Currently executing process (unlocked) */ + Port *port; /* Port to operate on */ + Eterm port_op; /* port operation as an atom */ + erts_aint32_t state; /* in: invalid state; out: read state (if read) */ + erts_aint32_t sched_flags; /* in: invalid flags; out: read flags (if read) */ + int async; /* Asynchronous operation */ + int pre_chk_sched_flags; /* Check sched flags before lock? */ int fpe_was_unmasked; - - ERTS_SMP_LC_ASSERT(erts_lc_is_port_locked(p) || ERTS_IS_CRASH_DUMPING); +} ErtsTryImmDrvCallState; + +#define ERTS_INIT_TRY_IMM_DRV_CALL_STATE(C_P, PRT, SFLGS, PTS_FLGS, A, PRT_OP) \ + {(C_P), (PRT), (PRT_OP), (SFLGS), (PTS_FLGS), (A), 1, 0} + +/* + * Try doing an immediate driver callback call from a process. If + * this fail, the operation should be scheduled in the normal case... + * + */ +static ERTS_INLINE ErtsTryImmDrvCallResult +try_imm_drv_call(ErtsTryImmDrvCallState *sp) +{ + ErtsTryImmDrvCallResult res; + erts_aint32_t invalid_state, invalid_sched_flags; + Port *prt = sp->port; + Process *c_p = sp->c_p; + + ASSERT(is_atom(sp->port_op)); + + invalid_sched_flags = ERTS_PTS_FLGS_FORCE_SCHEDULE_OP; + invalid_sched_flags |= sp->sched_flags; + if (sp->async) + invalid_sched_flags |= ERTS_PTS_FLG_PARALLELISM; + + if (sp->pre_chk_sched_flags) { + sp->sched_flags = erts_smp_atomic32_read_nob(&prt->sched.flags); + if (sp->sched_flags & invalid_sched_flags) + return ERTS_TRY_IMM_DRV_CALL_INVALID_SCHED_FLAGS; + } + + if (erts_smp_port_trylock(prt) == EBUSY) + return ERTS_TRY_IMM_DRV_CALL_BUSY_LOCK; + + invalid_state = sp->state; + sp->state = erts_atomic32_read_nob(&prt->state); + if (sp->state & invalid_state) { + res = ERTS_TRY_IMM_DRV_CALL_INVALID_PORT; + goto locked_fail; + } + + sp->sched_flags = erts_smp_atomic32_read_nob(&prt->sched.flags); + if (sp->sched_flags & invalid_sched_flags) { + res = ERTS_TRY_IMM_DRV_CALL_INVALID_SCHED_FLAGS; + goto locked_fail; + } + + if (c_p) { + if (IS_TRACED_FL(c_p, F_TRACE_SCHED_PROCS)) + trace_virtual_sched(c_p, am_out); + if (erts_system_profile_flags.runnable_procs + && erts_system_profile_flags.exclusive) + profile_runnable_proc(c_p, am_inactive); + + erts_smp_proc_unlock(c_p, ERTS_PROC_LOCK_MAIN); + } + ERTS_SMP_CHK_NO_PROC_LOCKS; - p->caller = caller_id; - if (drv->outputv != NULL) { - Uint vsize; - Uint csize; - Uint pvsize; - Uint pcsize; - ErlDrvSizeT blimit; + if (IS_TRACED_FL(prt, F_TRACE_SCHED_PORTS)) + trace_sched_ports_where(prt, am_in, sp->port_op); + if (erts_system_profile_flags.runnable_ports + && !erts_port_is_scheduled(prt)) + profile_runnable_port(prt, am_active); + + sp->fpe_was_unmasked = erts_block_fpe(); + + return ERTS_TRY_IMM_DRV_CALL_OK; + +locked_fail: + erts_port_release(prt); + return res; +} + +static ERTS_INLINE void +finalize_imm_drv_call(ErtsTryImmDrvCallState *sp) +{ + Port *prt = sp->port; + Process *c_p = sp->c_p; + + erts_port_driver_callback_epilogue(prt, NULL); + + erts_unblock_fpe(sp->fpe_was_unmasked); + + if (IS_TRACED_FL(prt, F_TRACE_SCHED_PORTS)) + trace_sched_ports_where(prt, am_out, sp->port_op); + if (erts_system_profile_flags.runnable_ports + && !erts_port_is_scheduled(prt)) + profile_runnable_port(prt, am_inactive); + + erts_port_release(prt); + + if (c_p) { + erts_smp_proc_lock(c_p, ERTS_PROC_LOCK_MAIN); + + if (IS_TRACED_FL(c_p, F_TRACE_SCHED_PROCS)) + trace_virtual_sched(c_p, am_in); + if (erts_system_profile_flags.runnable_procs + && erts_system_profile_flags.exclusive) + profile_runnable_proc(c_p, am_active); + } +} + +/* + * force_imm_drv_call()/finalize_force_imm_drv_call() should *only* + * be used while crash dumping... + */ +static ErtsTryImmDrvCallResult +force_imm_drv_call(ErtsTryImmDrvCallState *sp) +{ + erts_aint32_t invalid_state; + Port *prt = sp->port; + + ASSERT(ERTS_IS_CRASH_DUMPING) + ASSERT(is_atom(sp->port_op)); + + invalid_state = sp->state; + sp->state = erts_atomic32_read_nob(&prt->state); + if (sp->state & invalid_state) + return ERTS_TRY_IMM_DRV_CALL_INVALID_PORT; + + sp->fpe_was_unmasked = erts_block_fpe(); + + return ERTS_TRY_IMM_DRV_CALL_OK; +} + +static void +finalize_force_imm_drv_call(ErtsTryImmDrvCallState *sp) +{ + erts_unblock_fpe(sp->fpe_was_unmasked); +} + +#define ERTS_QUEUE_PORT_SCHED_OP_REPLY_SIZE (REF_THING_SIZE + 3) + +static ERTS_INLINE void +queue_port_sched_op_reply(Process *rp, + ErtsProcLocks *rp_locksp, + Eterm *hp_start, + Eterm *hp, + Uint h_size, + ErlHeapFragment* bp, + Uint32 *ref_num, + Eterm msg) +{ + Eterm ref = make_internal_ref(hp); + write_ref_thing(hp, ref_num[0], ref_num[1], ref_num[2]); + hp += REF_THING_SIZE; + + msg = TUPLE2(hp, ref, msg); + hp += 3; + + if (!bp) { + HRelease(rp, hp_start + h_size, hp); + } + else { + Uint used_h_size = hp - hp_start; + ASSERT(h_size >= used_h_size); + if (h_size > used_h_size) + bp = erts_resize_message_buffer(bp, used_h_size, &msg, 1); + } + + erts_queue_message(rp, + rp_locksp, + bp, + msg, + NIL +#ifdef USE_VM_PROBES + , NIL +#endif + ); +} + +static void +port_sched_op_reply(Eterm to, Uint32 *ref_num, Eterm msg) +{ + Process *rp = erts_proc_lookup_raw(to); + if (rp) { + ErlOffHeap *ohp; + ErlHeapFragment* bp; + Eterm msg_copy; + Uint hsz, msg_sz; + Eterm *hp, *hp_start; + ErtsProcLocks rp_locks = 0; + + hsz = ERTS_QUEUE_PORT_SCHED_OP_REPLY_SIZE; + if (is_immed(msg)) + msg_sz = 0; + else { + msg_sz = size_object(msg); + hsz += msg_sz; + } + + hp_start = hp = erts_alloc_message_heap(hsz, + &bp, + &ohp, + rp, + &rp_locks); + if (is_immed(msg)) + msg_copy = msg; + else + msg_copy = copy_struct(msg, msg_sz, &hp, ohp); + + queue_port_sched_op_reply(rp, + &rp_locks, + hp_start, + hp, + hsz, + bp, + ref_num, + msg_copy); + + if (rp_locks) + erts_smp_proc_unlock(rp, rp_locks); + } +} + + +ErtsPortOpResult +erts_schedule_proc2port_signal(Process *c_p, + Port *prt, + Eterm caller, + Eterm *refp, + ErtsProc2PortSigData *sigdp, + int task_flags, + ErtsProc2PortSigCallback callback) +{ + int sched_res; + if (!refp) { + if (c_p) + erts_smp_proc_unlock(c_p, ERTS_PROC_LOCK_MAIN); + } + else { + ASSERT(c_p); + sigdp->flags |= ERTS_P2P_SIG_DATA_FLG_REPLY; + erts_make_ref_in_array(sigdp->ref); + *refp = erts_proc_store_ref(c_p, sigdp->ref); + + /* + * Caller needs to wait for a message containing + * the ref that we just created. No such message + * can exist in callers message queue at this time. + * We therefore move the save pointer of the + * callers message queue to the end of the queue. + * + * NOTE: It is of vital importance that the caller + * immediately do a receive unconditionaly + * waiting for the message with the reference; + * otherwise, next receive will *not* work + * as expected! + */ + erts_smp_proc_lock(c_p, ERTS_PROC_LOCKS_MSG_RECEIVE); + + if (ERTS_PROC_PENDING_EXIT(c_p)) { + /* need to exit caller instead */ + erts_smp_proc_unlock(c_p, ERTS_PROC_LOCKS_MSG_RECEIVE); + KILL_CATCHES(c_p); + c_p->freason = EXC_EXIT; + return ERTS_PORT_OP_CALLER_EXIT; + } + + ERTS_SMP_MSGQ_MV_INQ2PRIVQ(c_p); + c_p->msg.save = c_p->msg.last; + + erts_smp_proc_unlock(c_p, + (ERTS_PROC_LOCK_MAIN + | ERTS_PROC_LOCKS_MSG_RECEIVE)); + } + + + sigdp->caller = caller; + + /* Schedule port close call for later execution... */ + sched_res = erts_port_task_schedule(prt->common.id, + NULL, + ERTS_PORT_TASK_PROC_SIG, + sigdp, + callback, + task_flags); + + if (c_p) + erts_smp_proc_lock(c_p, ERTS_PROC_LOCK_MAIN); + + if (sched_res != 0) { + if (refp) + *refp = NIL; + return ERTS_PORT_OP_DROPPED; + } + return ERTS_PORT_OP_SCHEDULED; +} + +static ERTS_INLINE void +send_badsig(Port *prt) +{ + ErtsProcLocks rp_locks = ERTS_PROC_LOCKS_XSIG_SEND; + Process* rp; + Eterm connected = ERTS_PORT_GET_CONNECTED(prt); + + ERTS_SMP_CHK_NO_PROC_LOCKS; + ERTS_LC_ASSERT(erts_get_scheduler_id()); + + ASSERT(is_internal_pid(connected)); + + rp = erts_proc_lookup_raw(connected); + if (rp) { + erts_smp_proc_lock(rp, rp_locks); + if (!ERTS_PROC_IS_EXITING(rp)) + (void) erts_send_exit_signal(NULL, + prt->common.id, + rp, + &rp_locks, + am_badsig, + NIL, + NULL, + 0); + if (rp_locks) + erts_smp_proc_unlock(rp, rp_locks); + } +} + +static void +badsig_received(int bang_op, + Port *prt, + erts_aint32_t state, + int bad_output_value) +{ + /* + * if (bang_op) + * we are part of a "Prt ! Something" operation + * else + * we are part of a call to a port BIF + * behave accordingly... + */ + if (!(state & ERTS_PORT_SFLGS_INVALID_LOOKUP)) { + if (bad_output_value) { + erts_dsprintf_buf_t *dsbufp = erts_create_logger_dsbuf(); + erts_dsprintf(dsbufp, "Bad value on output port '%s'\n", prt->name); + erts_send_error_to_logger_nogl(dsbufp); + } + if (bang_op) + send_badsig(prt); + } +} + +static int +port_badsig(Port *prt, erts_aint32_t state, int op, ErtsProc2PortSigData *sigdp) +{ + if (op == ERTS_PROC2PORT_SIG_EXEC) + badsig_received(sigdp->flags & ERTS_P2P_SIG_DATA_FLG_BANG_OP, + prt, + state, + sigdp->flags & ERTS_P2P_SIG_DATA_FLG_BAD_OUTPUT); + if (sigdp->flags & ERTS_P2P_SIG_DATA_FLG_REPLY) + port_sched_op_reply(sigdp->caller, sigdp->ref, am_badarg); + return ERTS_PORT_REDS_BADSIG; +} + + +/* + * bad_port_signal() will + * - preserve signal order of signals. + * - send a 'badsig' exit signal to connected process if 'from' is an + * internal pid and the port is alive when the bad signal reaches + * it. + */ +static ErtsPortOpResult +bad_port_signal(Process *c_p, + int flags, + Port *prt, + Eterm from, + Eterm *refp, + Eterm port_op) +{ + ErtsProc2PortSigData *sigdp; + ErtsTryImmDrvCallResult try_call_res; + ErtsTryImmDrvCallState try_call_state + = ERTS_INIT_TRY_IMM_DRV_CALL_STATE( + c_p, + prt, + ERTS_PORT_SFLGS_INVALID_LOOKUP, + 0, + !refp, + port_op); + + try_call_res = try_imm_drv_call(&try_call_state); + switch (try_call_res) { + case ERTS_TRY_IMM_DRV_CALL_OK: + badsig_received(flags & ERTS_PORT_SIG_FLG_BANG_OP, + prt, + try_call_state.state, + flags & ERTS_PORT_SIG_FLG_BAD_OUTPUT); + finalize_imm_drv_call(&try_call_state); + return ERTS_PORT_OP_BADARG; + case ERTS_TRY_IMM_DRV_CALL_INVALID_PORT: + return ERTS_PORT_OP_DROPPED; + case ERTS_TRY_IMM_DRV_CALL_INVALID_SCHED_FLAGS: + case ERTS_TRY_IMM_DRV_CALL_BUSY_LOCK: + /* Schedule badsig() call instead... */ + break; + } + + sigdp = erts_port_task_alloc_p2p_sig_data(); + sigdp->flags = (flags & ~ERTS_P2P_SIG_TYPE_MASK) | ERTS_P2P_SIG_TYPE_BAD; + + return erts_schedule_proc2port_signal(c_p, + prt, + c_p->common.id, + refp, + sigdp, + 0, + port_badsig); +} + + +/* + * Driver outputv() callback + */ + +static ERTS_INLINE void +call_driver_outputv(int bang_op, + Eterm caller, + Eterm from, + Port *prt, + erts_driver_t *drv, + ErlIOVec *evp) +{ + /* + * if (bang_op) + * we are part of a "Prt ! {From, {command, Data}}" operation + * else + * we are part of a call to port_command/[2,3] + * behave accordingly... + */ + if (bang_op && from != ERTS_PORT_GET_CONNECTED(prt)) + send_badsig(prt); + else { + ErlDrvSizeT size = evp->size; + + ERTS_SMP_LC_ASSERT(erts_lc_is_port_locked(prt) + || ERTS_IS_CRASH_DUMPING); + +#ifdef USE_VM_PROBES + if (DTRACE_ENABLED(driver_outputv)) { + DTRACE_FORMAT_COMMON_PID_AND_PORT(caller, prt); + DTRACE4(driver_outputv, process_str, port_str, prt->name, size); + } +#endif + + prt->caller = caller; + (*drv->outputv)((ErlDrvData) prt->drv_data, evp); + prt->caller = NIL; + + prt->bytes_out += size; + erts_smp_atomic_add_nob(&erts_bytes_out, size); + } +} + +static ERTS_INLINE void +cleanup_scheduled_outputv(ErlIOVec *ev, ErlDrvBinary *cbinp) +{ + int i; + /* Need to free all binaries */ + for (i = 1; i < ev->vsize; i++) + if (ev->binv[i]) + driver_free_binary(ev->binv[i]); + if (cbinp) + driver_free_binary(cbinp); + erts_free(ERTS_ALC_T_DRV_CMD_DATA, ev); +} + +static int +port_sig_outputv(Port *prt, erts_aint32_t state, int op, ErtsProc2PortSigData *sigdp) +{ + Eterm reply; + + switch (op) { + case ERTS_PROC2PORT_SIG_EXEC: + /* Execution of a scheduled outputv() call */ + + ERTS_SMP_LC_ASSERT(erts_lc_is_port_locked(prt)); + + if (state & ERTS_PORT_SFLGS_INVALID_LOOKUP) + reply = am_badarg; + else { + call_driver_outputv(sigdp->flags & ERTS_P2P_SIG_DATA_FLG_BANG_OP, + sigdp->caller, + sigdp->u.outputv.from, + prt, + prt->drv_ptr, + sigdp->u.outputv.evp); + reply = am_true; + } + break; + case ERTS_PROC2PORT_SIG_ABORT_NOSUSPEND: + reply = am_false; + break; + default: + reply = am_badarg; + break; + } + + if (sigdp->flags & ERTS_P2P_SIG_DATA_FLG_REPLY) + port_sched_op_reply(sigdp->caller, sigdp->ref, reply); + + cleanup_scheduled_outputv(sigdp->u.outputv.evp, + sigdp->u.outputv.cbinp); + + return ERTS_PORT_REDS_CMD_OUTPUTV; +} + +/* + * Driver output() callback + */ + +static ERTS_INLINE void +call_driver_output(int bang_op, + Eterm caller, + Eterm from, + Port *prt, + erts_driver_t *drv, + char *bufp, + ErlDrvSizeT size) +{ + /* + * if (bang_op) + * we are part of a "Prt ! {From, {command, Data}}" operation + * else + * we are part of a call to port_command/[2,3] + * behave accordingly... + */ + if (bang_op && from != ERTS_PORT_GET_CONNECTED(prt)) + send_badsig(prt); + else { + + ERTS_SMP_LC_ASSERT(erts_lc_is_port_locked(prt) + || ERTS_IS_CRASH_DUMPING); + +#ifdef USE_VM_PROBES + if (DTRACE_ENABLED(driver_output)) { + DTRACE_FORMAT_COMMON_PID_AND_PORT(caller, prt); + DTRACE4(driver_output, process_str, port_str, prt->name, size); + } +#endif + + prt->caller = caller; + (*drv->output)((ErlDrvData) prt->drv_data, bufp, size); + prt->caller = NIL; + + prt->bytes_out += size; + erts_smp_atomic_add_nob(&erts_bytes_out, size); + } +} + +static ERTS_INLINE void +cleanup_scheduled_output(char *bufp) +{ + erts_free(ERTS_ALC_T_DRV_CMD_DATA, bufp); +} + +static int +port_sig_output(Port *prt, erts_aint32_t state, int op, ErtsProc2PortSigData *sigdp) +{ + Eterm reply; + + switch (op) { + case ERTS_PROC2PORT_SIG_EXEC: + /* Execution of a scheduled output() call */ + + ERTS_SMP_LC_ASSERT(erts_lc_is_port_locked(prt)); + + if (state & ERTS_PORT_SFLGS_INVALID_LOOKUP) + reply = am_badarg; + else { + call_driver_output(sigdp->flags & ERTS_P2P_SIG_DATA_FLG_BANG_OP, + sigdp->caller, + sigdp->u.output.from, + prt, + prt->drv_ptr, + sigdp->u.output.bufp, + sigdp->u.output.size); + reply = am_true; + } + break; + case ERTS_PROC2PORT_SIG_ABORT_NOSUSPEND: + reply = am_false; + break; + default: + reply = am_badarg; + break; + } + + if (sigdp->flags & ERTS_P2P_SIG_DATA_FLG_REPLY) + port_sched_op_reply(sigdp->caller, sigdp->ref, reply); + + cleanup_scheduled_output(sigdp->u.output.bufp); + + return ERTS_PORT_REDS_CMD_OUTPUT; +} + +ErtsPortOpResult +erts_port_output(Process *c_p, + int flags, + Port *prt, + Eterm from, + Eterm list, + Eterm *refp) +{ + ErtsPortOpResult res; + ErtsProc2PortSigData *sigdp; + erts_driver_t *drv = prt->drv_ptr; + size_t size; + int try_call; + erts_aint32_t sched_flags, busy_flgs, invalid_flags; + int task_flags; + ErtsProc2PortSigCallback port_sig_callback; + ErlDrvBinary *cbin = NULL; + ErlIOVec *evp = NULL; + char *buf = NULL; + int force_immediate_call = (flags & ERTS_PORT_SIG_FLG_FORCE_IMM_CALL); + + ASSERT((flags & ~(ERTS_PORT_SIG_FLG_BANG_OP + | ERTS_PORT_SIG_FLG_NOSUSPEND + | ERTS_PORT_SIG_FLG_FORCE + | ERTS_PORT_SIG_FLG_FORCE_IMM_CALL)) == 0); + + busy_flgs = ((flags & ERTS_PORT_SIG_FLG_FORCE) + ? ((erts_aint32_t) 0) + : ERTS_PTS_FLGS_BUSY); + invalid_flags = busy_flgs; + if (!refp) + invalid_flags |= ERTS_PTS_FLG_PARALLELISM; + + /* + * Assumes caller have checked that port is valid... + */ + + sched_flags = erts_smp_atomic32_read_nob(&prt->sched.flags); + if (sched_flags & (busy_flgs|ERTS_PTS_FLG_EXIT)) + return ((sched_flags & ERTS_PTS_FLG_EXIT) + ? ERTS_PORT_OP_DROPPED + : ERTS_PORT_OP_BUSY); + + try_call = (force_immediate_call /* crash dumping */ + || !(sched_flags & (invalid_flags + | ERTS_PTS_FLGS_FORCE_SCHEDULE_OP))); + +#ifdef USE_VM_PROBES + if(DTRACE_ENABLED(port_command)) { + DTRACE_FORMAT_COMMON_PID_AND_PORT(c_p ? c_p->common.id : ERTS_INVALID_PID, prt); + DTRACE4(port_command, process_str, port_str, prt->name, "command"); + } +#endif + + if (drv->outputv) { + ErlIOVec ev; SysIOVec iv[SMALL_WRITE_VEC]; ErlDrvBinary* bv[SMALL_WRITE_VEC]; SysIOVec* ivp; ErlDrvBinary** bvp; - ErlDrvBinary* cbin; - ErlIOVec ev; + int vsize; + Uint csize; + Uint pvsize; + Uint pcsize; + Uint blimit; + size_t iov_offset, binv_offset, alloc_size; - if (io_list_vec_len(list, &vsize, &csize, - &pvsize, &pcsize, &size)) { + if (io_list_vec_len(list, &vsize, &csize, &pvsize, &pcsize, &size)) goto bad_value; + + iov_offset = ERTS_ALC_DATA_ALIGN_SIZE(sizeof(ErlIOVec)); + binv_offset = iov_offset; + binv_offset += ERTS_ALC_DATA_ALIGN_SIZE((vsize+1)*sizeof(SysIOVec)); + alloc_size = binv_offset; + alloc_size += (vsize+1)*sizeof(ErlDrvBinary *); + + if (try_call && vsize < SMALL_WRITE_VEC) { + ivp = ev.iov = iv; + bvp = ev.binv = bv; + evp = &ev; + } + else { + char *ptr = erts_alloc((try_call + ? ERTS_ALC_T_TMP + : ERTS_ALC_T_DRV_CMD_DATA), alloc_size); + + evp = (ErlIOVec *) ptr; + ivp = evp->iov = (SysIOVec *) (ptr + iov_offset); + bvp = evp->binv = (ErlDrvBinary **) (ptr + binv_offset); } + /* To pack or not to pack (small binaries) ...? */ - vsize++; - if (vsize <= SMALL_WRITE_VEC) { + if (vsize < SMALL_WRITE_VEC) { /* Do NOT pack */ blimit = 0; - } else { + } + else { /* Do pack */ vsize = pvsize + 1; csize = pcsize; blimit = ERL_SMALL_IO_BIN_LIMIT; } /* Use vsize and csize from now on */ - if (vsize <= SMALL_WRITE_VEC) { - ivp = iv; - bvp = bv; - } else { - ivp = (SysIOVec *) erts_alloc(ERTS_ALC_T_TMP, - vsize * sizeof(SysIOVec)); - bvp = (ErlDrvBinary**) erts_alloc(ERTS_ALC_T_TMP, - vsize * sizeof(ErlDrvBinary*)); - } + cbin = driver_alloc_binary(csize); if (!cbin) erts_alloc_enomem(ERTS_ALC_T_DRV_BINARY, ERTS_SIZEOF_Binary(csize)); @@ -1178,210 +1892,761 @@ int erts_write_to_port(Eterm caller_id, Port *p, Eterm list) ivp[0].iov_base = NULL; ivp[0].iov_len = 0; bvp[0] = NULL; - ev.vsize = io_list_to_vec(list, ivp+1, bvp+1, cbin, blimit); - if (ev.vsize < 0) { - if (ivp != iv) { - erts_free(ERTS_ALC_T_TMP, (void *) ivp); - } - if (bvp != bv) { - erts_free(ERTS_ALC_T_TMP, (void *) bvp); - } + evp->vsize = io_list_to_vec(list, ivp+1, bvp+1, cbin, blimit); + if (evp->vsize < 0) { + if (evp != &ev) + erts_free(try_call ? ERTS_ALC_T_TMP : ERTS_ALC_T_DRV_CMD_DATA, + evp); driver_free_binary(cbin); goto bad_value; } - ev.vsize++; #if 0 /* This assertion may say something useful, but it can be falsified during the emulator test suites. */ - ASSERT(ev.vsize == vsize); + ASSERT(evp->vsize == vsize); #endif - ev.size = size; /* total size */ - ev.iov = ivp; - ev.binv = bvp; -#ifdef USE_VM_PROBES - if (DTRACE_ENABLED(driver_outputv)) { - DTRACE_FORMAT_COMMON_PID_AND_PORT(caller_id, p) - DTRACE4(driver_outputv, process_str, port_str, p->name, size); - } -#endif - fpe_was_unmasked = erts_block_fpe(); - (*drv->outputv)((ErlDrvData)p->drv_data, &ev); - erts_unblock_fpe(fpe_was_unmasked); - if (ivp != iv) { - erts_free(ERTS_ALC_T_TMP, (void *) ivp); - } - if (bvp != bv) { - erts_free(ERTS_ALC_T_TMP, (void *) bvp); + evp->vsize++; + evp->size = size; /* total size */ + + if (!try_call) { + int i; + /* Need to increase refc on all binaries */ + for (i = 1; i < evp->vsize; i++) + if (bvp[i]) + driver_binary_inc_refc(bvp[i]); } - driver_free_binary(cbin); - } else { - int r; - - /* Try with an 8KB buffer first (will often be enough I guess). */ - size = 8*1024; - /* See below why the extra byte is added. */ - buf = erts_alloc(ERTS_ALC_T_TMP, size+1); - r = io_list_to_buf(list, buf, size); + else { + int i; + ErlIOVec *new_evp; + ErtsTryImmDrvCallResult try_call_res; + ErtsTryImmDrvCallState try_call_state + = ERTS_INIT_TRY_IMM_DRV_CALL_STATE( + c_p, + prt, + ERTS_PORT_SFLGS_INVALID_LOOKUP, + invalid_flags, + !refp, + am_command); + + try_call_state.pre_chk_sched_flags = 0; /* already checked */ + if (force_immediate_call) + try_call_res = force_imm_drv_call(&try_call_state); + else + try_call_res = try_imm_drv_call(&try_call_state); + switch (try_call_res) { + case ERTS_TRY_IMM_DRV_CALL_OK: + call_driver_outputv(flags & ERTS_PORT_SIG_FLG_BANG_OP, + c_p ? c_p->common.id : ERTS_INVALID_PID, + from, + prt, + drv, + evp); + if (force_immediate_call) + finalize_force_imm_drv_call(&try_call_state); + else + finalize_imm_drv_call(&try_call_state); + /* Fall through... */ + case ERTS_TRY_IMM_DRV_CALL_INVALID_PORT: + driver_free_binary(cbin); + if (evp != &ev) + erts_free(ERTS_ALC_T_TMP, evp); + if (try_call_res == ERTS_TRY_IMM_DRV_CALL_OK) + return ERTS_PORT_OP_DONE; + else + return ERTS_PORT_OP_DROPPED; + case ERTS_TRY_IMM_DRV_CALL_INVALID_SCHED_FLAGS: + sched_flags = try_call_state.sched_flags; + case ERTS_TRY_IMM_DRV_CALL_BUSY_LOCK: + /* Schedule outputv() call instead... */ + break; + } -#ifdef USE_VM_PROBES - if(DTRACE_ENABLED(port_command)) { - DTRACE_FORMAT_COMMON_PID_AND_PORT(caller_id, p) - DTRACE4(port_command, process_str, port_str, p->name, "command"); - } + /* Need to increase refc on all binaries */ + for (i = 1; i < evp->vsize; i++) + if (bvp[i]) + driver_binary_inc_refc(bvp[i]); + + new_evp = erts_alloc(ERTS_ALC_T_DRV_CMD_DATA, alloc_size); + + if (evp != &ev) { + sys_memcpy((void *) new_evp, (void *) evp, alloc_size); + new_evp->iov = (SysIOVec *) (((char *) new_evp) + + iov_offset); + bvp = new_evp->binv = (ErlDrvBinary **) (((char *) new_evp) + + binv_offset); + +#ifdef DEBUG + ASSERT(new_evp->vsize == evp->vsize); + ASSERT(new_evp->size == evp->size); + for (i = 0; i < evp->vsize; i++) { + ASSERT(new_evp->iov[i].iov_len == evp->iov[i].iov_len); + ASSERT(new_evp->iov[i].iov_base == evp->iov[i].iov_base); + ASSERT(new_evp->binv[i] == evp->binv[i]); + } #endif - if (r >= 0) { - size -= r; -#ifdef USE_VM_PROBES - if (DTRACE_ENABLED(driver_output)) { - DTRACE_FORMAT_COMMON_PID_AND_PORT(caller_id, p) - DTRACE4(driver_output, process_str, port_str, p->name, size); - } + erts_free(ERTS_ALC_T_TMP, evp); + } + else { /* from stack allocated structure; offsets may differ */ + + sys_memcpy((void *) new_evp, (void *) evp, sizeof(ErlIOVec)); + new_evp->iov = (SysIOVec *) (((char *) new_evp) + + iov_offset); + sys_memcpy((void *) new_evp->iov, + (void *) evp->iov, + evp->vsize * sizeof(SysIOVec)); + new_evp->binv = (ErlDrvBinary **) (((char *) new_evp) + + binv_offset); + sys_memcpy((void *) new_evp->binv, + (void *) evp->binv, + evp->vsize * sizeof(ErlDrvBinary *)); + +#ifdef DEBUG + ASSERT(new_evp->vsize == evp->vsize); + ASSERT(new_evp->size == evp->size); + for (i = 0; i < evp->vsize; i++) { + ASSERT(new_evp->iov[i].iov_len == evp->iov[i].iov_len); + ASSERT(new_evp->iov[i].iov_base == evp->iov[i].iov_base); + ASSERT(new_evp->binv[i] == evp->binv[i]); + } #endif - fpe_was_unmasked = erts_block_fpe(); - (*drv->output)((ErlDrvData)p->drv_data, buf, size); - erts_unblock_fpe(fpe_was_unmasked); - erts_free(ERTS_ALC_T_TMP, buf); + + } + + evp = new_evp; } - else if (r == -2) { - erts_free(ERTS_ALC_T_TMP, buf); - goto bad_value; + + sigdp = erts_port_task_alloc_p2p_sig_data(); + sigdp->flags = ERTS_P2P_SIG_TYPE_OUTPUTV; + sigdp->u.outputv.from = from; + sigdp->u.outputv.evp = evp; + sigdp->u.outputv.cbinp = cbin; + port_sig_callback = port_sig_outputv; + } + else { + ErlDrvSizeT r; + + /* + * Apperently there exist code that write 1 byte to + * much in buffer. Where it resides I don't know, but + * we can live with one byte extra allocated... + */ + + if (!try_call) { + if (erts_iolist_size(list, &size)) + goto bad_value; + + buf = erts_alloc(ERTS_ALC_T_DRV_CMD_DATA, size + 1); + + r = erts_iolist_to_buf(list, buf, size); + ASSERT(ERTS_IOLIST_TO_BUF_SUCCEEDED(r)); } else { - ASSERT(r == -1); /* Overflow */ - erts_free(ERTS_ALC_T_TMP, buf); - if (erts_iolist_size(list, &size)) { - goto bad_value; + char *new_buf; + ErtsTryImmDrvCallResult try_call_res; + ErtsTryImmDrvCallState try_call_state + = ERTS_INIT_TRY_IMM_DRV_CALL_STATE( + c_p, + prt, + ERTS_PORT_SFLGS_INVALID_LOOKUP, + invalid_flags, + !refp, + am_command); + + /* Try with an 8KB buffer first (will often be enough I guess). */ + size = 8*1024; + + buf = erts_alloc(ERTS_ALC_T_TMP, size + 1); + r = erts_iolist_to_buf(list, buf, size); + + if (ERTS_IOLIST_TO_BUF_SUCCEEDED(r)) { + ASSERT(r <= size); + size -= r; + } + else { + erts_free(ERTS_ALC_T_TMP, buf); + if (r == ERTS_IOLIST_TO_BUF_TYPE_ERROR) + goto bad_value; + ASSERT(r == ERTS_IOLIST_TO_BUF_OVERFLOW); + if (erts_iolist_size(list, &size)) + goto bad_value; + buf = erts_alloc(ERTS_ALC_T_TMP, size + 1); + r = erts_iolist_to_buf(list, buf, size); + ASSERT(ERTS_IOLIST_TO_BUF_SUCCEEDED(r)); } - /* - * I know drivers that pad space with '\0' this is clearly - * incorrect but I don't feel like fixing them now, insted - * add ONE extra byte. - */ - buf = erts_alloc(ERTS_ALC_T_TMP, size+1); - r = io_list_to_buf(list, buf, size); -#ifdef USE_VM_PROBES - if (DTRACE_ENABLED(driver_output)) { - DTRACE_FORMAT_COMMON_PID_AND_PORT(caller_id, p) - DTRACE4(driver_output, process_str, port_str, p->name, size); - } -#endif - fpe_was_unmasked = erts_block_fpe(); - (*drv->output)((ErlDrvData)p->drv_data, buf, size); - erts_unblock_fpe(fpe_was_unmasked); + try_call_state.pre_chk_sched_flags = 0; /* already checked */ + if (force_immediate_call) + try_call_res = force_imm_drv_call(&try_call_state); + else + try_call_res = try_imm_drv_call(&try_call_state); + switch (try_call_res) { + case ERTS_TRY_IMM_DRV_CALL_OK: + call_driver_output(flags & ERTS_PORT_SIG_FLG_BANG_OP, + c_p ? c_p->common.id : ERTS_INVALID_PID, + from, + prt, + drv, + buf, + size); + if (force_immediate_call) + finalize_force_imm_drv_call(&try_call_state); + else + finalize_imm_drv_call(&try_call_state); + /* Fall through... */ + case ERTS_TRY_IMM_DRV_CALL_INVALID_PORT: + erts_free(ERTS_ALC_T_TMP, buf); + if (try_call_res == ERTS_TRY_IMM_DRV_CALL_OK) + return ERTS_PORT_OP_DONE; + else + return ERTS_PORT_OP_DROPPED; + case ERTS_TRY_IMM_DRV_CALL_INVALID_SCHED_FLAGS: + sched_flags = try_call_state.sched_flags; + case ERTS_TRY_IMM_DRV_CALL_BUSY_LOCK: + /* Schedule outputv() call instead... */ + break; + } + + new_buf = erts_alloc(ERTS_ALC_T_DRV_CMD_DATA, size + 1); + sys_memcpy(new_buf, buf, size); erts_free(ERTS_ALC_T_TMP, buf); + buf = new_buf; } + + sigdp = erts_port_task_alloc_p2p_sig_data(); + sigdp->flags = ERTS_P2P_SIG_TYPE_OUTPUT; + sigdp->u.output.from = from; + sigdp->u.output.bufp = buf; + sigdp->u.output.size = size; + port_sig_callback = port_sig_output; + } + + task_flags = ERTS_PT_FLG_WAIT_BUSY; + sigdp->flags |= flags; + if (flags & (ERTS_P2P_SIG_DATA_FLG_FORCE|ERTS_P2P_SIG_DATA_FLG_NOSUSPEND)) { + task_flags = 0; + if (flags & ERTS_P2P_SIG_DATA_FLG_FORCE) + sigdp->flags &= ~ERTS_P2P_SIG_DATA_FLG_NOSUSPEND; + else if (flags & ERTS_P2P_SIG_DATA_FLG_NOSUSPEND) + task_flags = ERTS_PT_FLG_NOSUSPEND; + } + + res = erts_schedule_proc2port_signal(c_p, + prt, + c_p ? c_p->common.id : ERTS_INVALID_PID, + refp, + sigdp, + task_flags, + port_sig_callback); + + if (res != ERTS_PORT_OP_SCHEDULED) { + if (drv->outputv) + cleanup_scheduled_outputv(evp, cbin); + else + cleanup_scheduled_output(buf); + return res; } - p->bytes_out += size; - erts_smp_atomic_add_nob(&erts_bytes_out, size); -#ifdef ERTS_SMP - if (p->xports) - erts_smp_xports_unlock(p); - ASSERT(!p->xports); + if (!(sched_flags & ERTS_PTS_FLG_EXIT) && (sched_flags & busy_flgs)) + return ERTS_PORT_OP_BUSY_SCHEDULED; + + return res; + +bad_value: + + flags |= ERTS_PORT_SIG_FLG_BAD_OUTPUT; + return bad_port_signal(c_p, flags, prt, from, refp, am_command); +} + +static ERTS_INLINE ErtsPortOpResult +call_deliver_port_exit(int bang_op, + Eterm from, + Port *prt, + erts_aint32_t state, + Eterm reason, + int broken_link) +{ + /* + * if (bang_op) + * we are part of a "Prt ! {From, close}" operation + * else + * we are part of a call to port_close(Port) + * behave accordingly... + */ + + if (state & ERTS_PORT_SFLGS_INVALID_LOOKUP) + return ERTS_PORT_OP_DROPPED; + + if (bang_op && from != ERTS_PORT_GET_CONNECTED(prt)) { + send_badsig(prt); + return ERTS_PORT_OP_DROPPED; + } + + if (broken_link) { + ErtsLink *lnk = erts_remove_link(&ERTS_P_LINKS(prt), from); + if (lnk) + erts_destroy_link(lnk); + else + return ERTS_PORT_OP_DROPPED; + } + + if (!erts_deliver_port_exit(prt, from, reason, bang_op)) + return ERTS_PORT_OP_DROPPED; + +#ifdef USE_VM_PROBES + if(DTRACE_ENABLED(port_command) && bang_op) { + DTRACE_FORMAT_COMMON_PID_AND_PORT(from, prt); + DTRACE4(port_command, process_str, port_str, prt->name, "close"); + } #endif - p->caller = NIL; - return 0; - bad_value: - p->caller = NIL; - { - erts_dsprintf_buf_t *dsbufp = erts_create_logger_dsbuf(); - erts_dsprintf(dsbufp, "Bad value on output port '%s'\n", p->name); - erts_send_error_to_logger_nogl(dsbufp); - return 1; + return ERTS_PORT_OP_DONE; +} + +static int +port_sig_exit(Port *prt, + erts_aint32_t state, + int op, + ErtsProc2PortSigData *sigdp) +{ + Eterm msg = am_badarg; + if (op == ERTS_PROC2PORT_SIG_EXEC) { + ErtsPortOpResult res; + int bang_op = sigdp->flags & ERTS_P2P_SIG_DATA_FLG_BANG_OP; + int broken_link = sigdp->flags & ERTS_P2P_SIG_DATA_FLG_BROKEN_LINK; + res = call_deliver_port_exit(bang_op, + sigdp->u.exit.from, + prt, + state, + sigdp->u.exit.reason, + broken_link); + + if (res == ERTS_PORT_OP_DONE) + msg = am_true; + } + if (sigdp->u.exit.bp) + free_message_buffer(sigdp->u.exit.bp); + if (sigdp->flags & ERTS_P2P_SIG_DATA_FLG_REPLY) + port_sched_op_reply(sigdp->caller, sigdp->ref, msg); + + return ERTS_PORT_REDS_EXIT; +} + +ErtsPortOpResult +erts_port_exit(Process *c_p, + int flags, + Port *prt, + Eterm from, + Eterm reason, + Eterm *refp) +{ + ErtsPortOpResult res; + ErtsProc2PortSigData *sigdp; + ErlHeapFragment *bp = NULL; + + ASSERT((flags & ~(ERTS_PORT_SIG_FLG_BANG_OP + | ERTS_PORT_SIG_FLG_BROKEN_LINK + | ERTS_PORT_SIG_FLG_FORCE_SCHED)) == 0); + + if (!(flags & ERTS_PORT_SIG_FLG_FORCE_SCHED)) { + ErtsTryImmDrvCallState try_call_state + = ERTS_INIT_TRY_IMM_DRV_CALL_STATE(c_p, + prt, + ERTS_PORT_SFLGS_INVALID_LOOKUP, + 0, + !refp, + am_exit); + + + switch (try_imm_drv_call(&try_call_state)) { + case ERTS_TRY_IMM_DRV_CALL_OK: { + res = call_deliver_port_exit(flags & ERTS_PORT_SIG_FLG_BANG_OP, + from, + prt, + try_call_state.state, + reason, + flags & ERTS_PORT_SIG_FLG_BROKEN_LINK); + finalize_imm_drv_call(&try_call_state); + return res; + } + case ERTS_TRY_IMM_DRV_CALL_INVALID_PORT: + return ERTS_PORT_OP_DROPPED; + default: + /* Schedule call instead... */ + break; + } } + + sigdp = erts_port_task_alloc_p2p_sig_data(); + sigdp->flags = ERTS_P2P_SIG_TYPE_EXIT | flags; + sigdp->u.exit.from = from; + + if (is_immed(reason)) { + sigdp->u.exit.reason = reason; + sigdp->u.exit.bp = NULL; + } + else { + Eterm *hp; + Uint hsz = size_object(reason); + bp = new_message_buffer(hsz); + sigdp->u.exit.bp = bp; + hp = bp->mem; + sigdp->u.exit.reason = copy_struct(reason, + hsz, + &hp, + &bp->off_heap); + } + + res = erts_schedule_proc2port_signal(c_p, + prt, + c_p ? c_p->common.id : from, + refp, + sigdp, + 0, + port_sig_exit); + + if (res == ERTS_PORT_OP_DROPPED) { + if (bp) + free_message_buffer(bp); + } + + return res; } -/* initialize the port array */ -void init_io(void) +static ErtsPortOpResult +set_port_connected(int bang_op, + Eterm from, + Port *prt, + erts_aint32_t state, + Eterm connect) { - int i; - ErlDrvEntry** dp; - char maxports[21]; /* enough for any 64-bit integer */ - size_t maxportssize = sizeof(maxports); - Uint ports_bits = ERTS_PORTS_BITS; - Sint port_extra_shift; + /* + * if (bang_op) + * we are part of a "Prt ! {From, {connect, Connect}}" operation + * else + * we are part of a call to port_connect(Port, Connect) + * behave accordingly... + */ -#ifdef ERTS_SMP - init_xports_list_alloc(); + if (state & ERTS_PORT_SFLGS_INVALID_LOOKUP) + return ERTS_PORT_OP_DROPPED; + + if (bang_op) { /* Bang operation */ + if (is_not_internal_pid(connect) || ERTS_PORT_GET_CONNECTED(prt) != from) { + send_badsig(prt); + return ERTS_PORT_OP_DROPPED; + } + + ERTS_PORT_SET_CONNECTED(prt, connect); + deliver_result(prt->common.id, from, am_connected); + +#ifdef USE_VM_PROBES + if(DTRACE_ENABLED(port_command)) { + DTRACE_FORMAT_COMMON_PID_AND_PORT(from, prt); + DTRACE4(port_command, process_str, port_str, prt->name, "connect"); + } #endif + } + else { /* Port BIF operation */ + Process *rp = erts_proc_lookup_raw(connect); + if (!rp) + return ERTS_PORT_OP_DROPPED; + erts_smp_proc_lock(rp, ERTS_PROC_LOCK_LINK); + if (ERTS_PROC_IS_EXITING(rp)) { + erts_smp_proc_unlock(rp, ERTS_PROC_LOCK_LINK); + return ERTS_PORT_OP_DROPPED; + } - pdl_init(); + erts_add_link(&ERTS_P_LINKS(rp), LINK_PID, prt->common.id); + erts_add_link(&ERTS_P_LINKS(prt), LINK_PID, connect); + + ERTS_PORT_SET_CONNECTED(prt, connect); + + erts_smp_proc_unlock(rp, ERTS_PROC_LOCK_LINK); + +#ifdef USE_VM_PROBES + if (DTRACE_ENABLED(port_connect)) { + DTRACE_CHARBUF(process_str, DTRACE_TERM_BUF_SIZE); + DTRACE_CHARBUF(port_str, DTRACE_TERM_BUF_SIZE); + DTRACE_CHARBUF(newprocess_str, DTRACE_TERM_BUF_SIZE); + + dtrace_pid_str(connect, process_str); + erts_snprintf(port_str, sizeof(port_str), "%T", prt->common.id); + dtrace_proc_str(rp, newprocess_str); + DTRACE4(port_connect, process_str, port_str, prt->name, newprocess_str); + } +#endif + } + + return ERTS_PORT_OP_DONE; +} - if (erts_sys_getenv_raw("ERL_MAX_PORTS", maxports, &maxportssize) == 0) - erts_max_ports = atoi(maxports); +static int +port_sig_connect(Port *prt, erts_aint32_t state, int op, ErtsProc2PortSigData *sigdp) +{ + Eterm msg = am_badarg; + if (op == ERTS_PROC2PORT_SIG_EXEC) { + ErtsPortOpResult res; + res = set_port_connected(sigdp->flags & ERTS_P2P_SIG_DATA_FLG_BANG_OP, + sigdp->u.connect.from, + prt, + state, + sigdp->u.connect.connected); + if (res == ERTS_PORT_OP_DONE) + msg = am_true; + } + if (sigdp->flags & ERTS_P2P_SIG_DATA_FLG_REPLY) + port_sched_op_reply(sigdp->caller, sigdp->ref, msg); + return ERTS_PORT_REDS_CONNECT; +} + +ErtsPortOpResult +erts_port_connect(Process *c_p, + int flags, + Port *prt, + Eterm from, + Eterm connect, + Eterm *refp) +{ + ErtsProc2PortSigData *sigdp; + Eterm connect_id; + ErtsTryImmDrvCallState try_call_state + = ERTS_INIT_TRY_IMM_DRV_CALL_STATE(c_p, + prt, + ERTS_PORT_SFLGS_INVALID_LOOKUP, + 0, + !refp, + am_connect); + + ASSERT((flags & ~ERTS_PORT_SIG_FLG_BANG_OP) == 0); + + if (is_not_internal_pid(connect)) + connect_id = NIL; /* Fail in op (for signal order) */ else - erts_max_ports = sys_max_files(); + connect_id = connect; + + switch (try_imm_drv_call(&try_call_state)) { + case ERTS_TRY_IMM_DRV_CALL_OK: { + ErtsPortOpResult res; + res = set_port_connected(flags & ERTS_PORT_SIG_FLG_BANG_OP, + from, + prt, + try_call_state.state, + connect_id); + finalize_imm_drv_call(&try_call_state); + return res; + } + case ERTS_TRY_IMM_DRV_CALL_INVALID_PORT: + return ERTS_PORT_OP_DROPPED; + default: + /* Schedule call instead... */ + break; + } + + sigdp = erts_port_task_alloc_p2p_sig_data(); + sigdp->flags = ERTS_P2P_SIG_TYPE_CONNECT | flags; + + sigdp->u.connect.from = from; + sigdp->u.connect.connected = connect_id; + + return erts_schedule_proc2port_signal(c_p, + prt, + c_p->common.id, + refp, + sigdp, + 0, + port_sig_connect); +} - if (erts_max_ports > ERTS_MAX_PORTS) - erts_max_ports = ERTS_MAX_PORTS; - if (erts_max_ports < 1024) - erts_max_ports = 1024; +static void +port_unlink(Port *prt, Eterm from) +{ + ErtsLink *lnk = erts_remove_link(&ERTS_P_LINKS(prt), from); + if (lnk) + erts_destroy_link(lnk); +} - if (erts_use_r9_pids_ports) { - ports_bits = ERTS_R9_PORTS_BITS; - if (erts_max_ports > ERTS_MAX_R9_PORTS) - erts_max_ports = ERTS_MAX_R9_PORTS; +static int +port_sig_unlink(Port *prt, erts_aint32_t state, int op, ErtsProc2PortSigData *sigdp) +{ + if (op == ERTS_PROC2PORT_SIG_EXEC) + port_unlink(prt, sigdp->u.unlink.from); + if (sigdp->flags & ERTS_P2P_SIG_DATA_FLG_REPLY) + port_sched_op_reply(sigdp->caller, sigdp->ref, am_true); + return ERTS_PORT_REDS_UNLINK; +} + +ErtsPortOpResult +erts_port_unlink(Process *c_p, Port *prt, Eterm from, Eterm *refp) +{ + ErtsProc2PortSigData *sigdp; + ErtsTryImmDrvCallState try_call_state + = ERTS_INIT_TRY_IMM_DRV_CALL_STATE(c_p, + prt, + ERTS_PORT_SFLGS_DEAD, + 0, + !refp, + am_unlink); + + switch (try_imm_drv_call(&try_call_state)) { + case ERTS_TRY_IMM_DRV_CALL_OK: + port_unlink(prt, from); + finalize_imm_drv_call(&try_call_state); + return ERTS_PORT_OP_DONE; + case ERTS_TRY_IMM_DRV_CALL_INVALID_PORT: + return ERTS_PORT_OP_DROPPED; + default: + /* Schedule call instead... */ + break; } - port_extra_shift = erts_fit_in_bits_int32(erts_max_ports - 1); - port_num_mask = (1 << ports_bits) - 1; + sigdp = erts_port_task_alloc_p2p_sig_data(); + sigdp->flags = ERTS_P2P_SIG_TYPE_UNLINK; + sigdp->u.unlink.from = from; + + return erts_schedule_proc2port_signal(c_p, + prt, + c_p ? c_p->common.id : from, + refp, + sigdp, + 0, + port_sig_unlink); +} - erts_port_tab_index_mask = ~(~((Uint) 0) << port_extra_shift); - erts_max_ports = 1 << port_extra_shift; +static void +port_link_failure(Eterm port_id, Eterm linker) +{ + Process *rp; + ErtsProcLocks rp_locks = ERTS_PROC_LOCK_LINK|ERTS_PROC_LOCKS_XSIG_SEND; + ASSERT(is_internal_pid(linker)); + rp = erts_pid2proc(NULL, 0, linker, rp_locks); + if (rp) { + ErtsLink *rlnk = erts_remove_link(&ERTS_P_LINKS(rp), port_id); + if (rlnk) { + int xres = erts_send_exit_signal(NULL, + port_id, + rp, + &rp_locks, + am_noproc, + NIL, + NULL, + 0); + if (xres >= 0 && IS_TRACED_FL(rp, F_TRACE_PROCS)) { + /* We didn't exit the process and it is traced */ + if (IS_TRACED_FL(rp, F_TRACE_PROCS)) + trace_proc(NULL, rp, am_getting_unlinked, port_id); + } + if (rp_locks) + erts_smp_proc_unlock(rp, rp_locks); + } + } +} - erts_smp_mtx_init(&erts_driver_list_lock,"driver_list"); - driver_list = NULL; - erts_smp_tsd_key_create(&driver_list_lock_status_key); - erts_smp_tsd_key_create(&driver_list_last_error_key); +static void +port_link(Port *prt, erts_aint32_t state, Eterm to) +{ + if (!(state & ERTS_PORT_SFLGS_INVALID_LOOKUP)) + erts_add_link(&ERTS_P_LINKS(prt), LINK_PID, to); + else + port_link_failure(prt->common.id, to); +} - if (erts_max_ports * sizeof(Port) <= erts_max_ports) { - /* More memory needed than the whole address space. */ - erts_alloc_enomem(ERTS_ALC_T_PORT_TABLE, ~((Uint) 0)); +static int +port_sig_link(Port *prt, erts_aint32_t state, int op, ErtsProc2PortSigData *sigdp) +{ + if (op == ERTS_PROC2PORT_SIG_EXEC) + port_link(prt, state, sigdp->u.link.to); + else + port_link_failure(sigdp->u.link.port, sigdp->u.link.to); + if (sigdp->flags & ERTS_P2P_SIG_DATA_FLG_REPLY) + port_sched_op_reply(sigdp->caller, sigdp->ref, am_true); + return ERTS_PORT_REDS_LINK; +} + +ErtsPortOpResult +erts_port_link(Process *c_p, Port *prt, Eterm to, Eterm *refp) +{ + ErtsProc2PortSigData *sigdp; + ErtsTryImmDrvCallState try_call_state + = ERTS_INIT_TRY_IMM_DRV_CALL_STATE(c_p, + prt, + ERTS_PORT_SFLGS_INVALID_LOOKUP, + 0, + !refp, + am_link); + + switch (try_imm_drv_call(&try_call_state)) { + case ERTS_TRY_IMM_DRV_CALL_OK: + port_link(prt, try_call_state.state, to); + finalize_imm_drv_call(&try_call_state); + return ERTS_PORT_OP_DONE; + case ERTS_TRY_IMM_DRV_CALL_INVALID_PORT: + return ERTS_PORT_OP_BADARG; + default: + /* Schedule call instead... */ + break; } - erts_port = (Port *) erts_alloc(ERTS_ALC_T_PORT_TABLE, - erts_max_ports * sizeof(Port)); + sigdp = erts_port_task_alloc_p2p_sig_data(); + sigdp->flags = ERTS_P2P_SIG_TYPE_LINK; + sigdp->u.link.port = prt->common.id; + sigdp->u.link.to = to; + + return erts_schedule_proc2port_signal(c_p, + prt, + c_p ? c_p->common.id : to, + refp, + sigdp, + 0, + port_sig_link); +} - erts_smp_atomic_init_nob(&erts_bytes_out, 0); - erts_smp_atomic_init_nob(&erts_bytes_in, 0); +void erts_init_io(int port_tab_size, + int port_tab_size_ignore_files) +{ + ErlDrvEntry** dp; + erts_smp_rwmtx_opt_t drv_list_rwmtx_opts = ERTS_SMP_RWMTX_OPT_DEFAULT_INITER; + drv_list_rwmtx_opts.type = ERTS_SMP_RWMTX_TYPE_EXTREMELY_FREQUENT_READ; + drv_list_rwmtx_opts.lived = ERTS_SMP_RWMTX_LONG_LIVED; - for (i = 0; i < erts_max_ports; i++) { - erts_port_task_init_sched(&erts_port[i].sched); - erts_smp_atomic_init_nob(&erts_port[i].refc, 0); #ifdef ERTS_SMP - erts_port[i].lock = NULL; - erts_port[i].xports = NULL; - erts_smp_spinlock_init_x(&erts_port[i].state_lck, -#ifdef ERTS_ENABLE_LOCK_COUNT - (erts_lcnt_rt_options & ERTS_LCNT_OPT_PORTLOCK) ? "port_state" : NULL, -#else - "port_state", -#endif - make_small(0)); + init_xports_list_alloc(); #endif - erts_port[i].tracer_proc = NIL; - erts_port[i].trace_flags = 0; - erts_port[i].drv_ptr = NULL; - erts_port[i].status = ERTS_PORT_SFLG_FREE; - erts_port[i].name = NULL; - erts_port[i].nlinks = NULL; - erts_port[i].monitors = NULL; - erts_port[i].linebuf = NULL; - erts_port[i].port_data_lock = NULL; + pdl_init(); + + if (!port_tab_size_ignore_files) { + int max_files = sys_max_files(); + if (port_tab_size < max_files) + port_tab_size = max_files; } - erts_smp_atomic32_init_nob(&erts_ports_snapshot, (erts_aint32_t) 0); - last_port_num = 0; - erts_smp_spinlock_init(&get_free_port_lck, "get_free_port"); + if (port_tab_size > ERTS_MAX_PORTS) + port_tab_size = ERTS_MAX_PORTS; + else if (port_tab_size < ERTS_MIN_PORTS) + port_tab_size = ERTS_MIN_PORTS; + + erts_smp_rwmtx_init_opt(&erts_driver_list_lock, + &drv_list_rwmtx_opts, + "driver_list"); + driver_list = NULL; + erts_smp_tsd_key_create(&driver_list_lock_status_key); + erts_smp_tsd_key_create(&driver_list_last_error_key); + + erts_ptab_init_table(&erts_port, + ERTS_ALC_T_PORT_TABLE, + NULL, + (ErtsPTabElementCommon *) &erts_invalid_port.common, + port_tab_size, + "port_table"); + + erts_smp_atomic_init_nob(&erts_bytes_out, 0); + erts_smp_atomic_init_nob(&erts_bytes_in, 0); sys_init_io(); erts_smp_tsd_set(driver_list_lock_status_key, (void *) 1); - erts_smp_mtx_lock(&erts_driver_list_lock); + erts_smp_rwmtx_rwlock(&erts_driver_list_lock); init_driver(&fd_driver, &fd_driver_entry, NULL); init_driver(&vanilla_driver, &vanilla_driver_entry, NULL); @@ -1390,27 +2655,63 @@ void init_io(void) erts_add_driver_entry(*dp, NULL, 1); erts_smp_tsd_set(driver_list_lock_status_key, NULL); - erts_smp_mtx_unlock(&erts_driver_list_lock); + erts_smp_rwmtx_rwunlock(&erts_driver_list_lock); } #if defined(ERTS_ENABLE_LOCK_COUNT) && defined(ERTS_SMP) -void erts_lcnt_enable_io_lock_count(int enable) { - int i; - for (i = 0; i < erts_max_ports; i++) { - Port* p = &erts_port[i]; - if (enable) { - erts_lcnt_init_lock_x(&p->state_lck.lcnt, "port_state", ERTS_LCNT_LT_SPINLOCK, make_small(i)); - if (p->lock) { - erts_lcnt_init_lock_x(&p->lock->lcnt, "port_lock", ERTS_LCNT_LT_MUTEX, make_small(i)); - } - } else { - erts_lcnt_destroy_lock(&p->state_lck.lcnt); - if (p->lock) { - erts_lcnt_destroy_lock(&p->lock->lcnt); - } - } +static ERTS_INLINE void lcnt_enable_drv_lock_count(erts_driver_t *dp, int enable) +{ + if (dp->lock) { + if (enable) + erts_lcnt_init_lock_x(&dp->lock->lcnt, + "driver_lock", + ERTS_LCNT_LT_MUTEX, + am_atom_put(dp->name, + sys_strlen(dp->name))); + else + erts_lcnt_destroy_lock(&dp->lock->lcnt); + + } +} + +static ERTS_INLINE void lcnt_enable_port_lock_count(Port *prt, int enable) +{ + erts_aint32_t state = erts_atomic32_read_nob(&prt->state); + if (!enable) { + erts_lcnt_destroy_lock(&prt->sched.mtx.lcnt); + if (state & ERTS_PORT_SFLG_PORT_SPECIFIC_LOCK) + erts_lcnt_destroy_lock(&prt->lock->lcnt); } + else { + erts_lcnt_init_lock_x(&prt->sched.mtx.lcnt, + "port_sched_lock", + ERTS_LCNT_LT_MUTEX, + prt->common.id); + if (state & ERTS_PORT_SFLG_PORT_SPECIFIC_LOCK) + erts_lcnt_init_lock_x(&prt->lock->lcnt, + "port_lock", + ERTS_LCNT_LT_MUTEX, + prt->common.id); + } +} + +void erts_lcnt_enable_io_lock_count(int enable) +{ + erts_driver_t *dp; + int i, max = erts_ptab_max(&erts_port); + + for (i = 0; i < max; i++) { + Port *prt = erts_pix2port(i); + if (prt) + lcnt_enable_port_lock_count(prt, enable); + } + + lcnt_enable_drv_lock_count(&vanilla_driver, enable); + lcnt_enable_drv_lock_count(&spawn_driver, enable); + lcnt_enable_drv_lock_count(&fd_driver, enable); + for (dp = driver_list; dp; dp = dp->next) + lcnt_enable_drv_lock_count(dp, enable); } #endif @@ -1594,9 +2895,7 @@ deliver_result(Eterm sender, Eterm pid, Eterm res) ERTS_SMP_CHK_NO_PROC_LOCKS; - ASSERT(is_internal_port(sender) - && is_internal_pid(pid) - && internal_pid_index(pid) < erts_max_processes); + ASSERT(is_internal_port(sender) && is_internal_pid(pid)); rp = (scheduler ? erts_proc_lookup(pid) @@ -1608,16 +2907,19 @@ deliver_result(Eterm sender, Eterm pid, Eterm res) ErlOffHeap *ohp; Eterm* hp; Uint sz_res; - sz_res = size_object(res); - hp = erts_alloc_message_heap(sz_res + 3, &bp, &ohp, rp, &rp_locks); - res = copy_struct(res, sz_res, &hp, ohp); - tuple = TUPLE2(hp, sender, res); + + sz_res = size_object(res); + hp = erts_alloc_message_heap(sz_res + 3, &bp, &ohp, rp, &rp_locks); + res = copy_struct(res, sz_res, &hp, ohp); + tuple = TUPLE2(hp, sender, res); erts_queue_message(rp, &rp_locks, bp, tuple, NIL #ifdef USE_VM_PROBES , NIL #endif ); - erts_smp_proc_unlock(rp, rp_locks); + + if (rp_locks) + erts_smp_proc_unlock(rp, rp_locks); if (!scheduler) erts_smp_proc_dec_refc(rp); @@ -1633,7 +2935,7 @@ deliver_result(Eterm sender, Eterm pid, Eterm res) * len -- length of data */ -static void deliver_read_message(Port* prt, Eterm to, +static void deliver_read_message(Port* prt, erts_aint32_t state, Eterm to, char *hbuf, ErlDrvSizeT hlen, char *buf, ErlDrvSizeT len, int eol) { @@ -1651,10 +2953,11 @@ static void deliver_read_message(Port* prt, Eterm to, ERTS_SMP_CHK_NO_PROC_LOCKS; need = 3 + 3 + 2*hlen; - if (prt->status & ERTS_PORT_SFLG_LINEBUF_IO) { + + if (state & ERTS_PORT_SFLG_LINEBUF_IO) { need += 3; } - if (prt->status & ERTS_PORT_SFLG_BINARY_IO && buf != NULL) { + if ((state & ERTS_PORT_SFLG_BINARY_IO) && buf != NULL) { need += PROC_BIN_SIZE; } else { need += 2*len; @@ -1670,7 +2973,7 @@ static void deliver_read_message(Port* prt, Eterm to, hp = erts_alloc_message_heap(need, &bp, &ohp, rp, &rp_locks); listp = NIL; - if ((prt->status & ERTS_PORT_SFLG_BINARY_IO) == 0) { + if ((state & ERTS_PORT_SFLG_BINARY_IO) == 0) { listp = buf_to_intlist(&hp, buf, len, listp); } else if (buf != NULL) { ProcBin* pb; @@ -1701,14 +3004,14 @@ static void deliver_read_message(Port* prt, Eterm to, listp = buf_to_intlist(&hp, hbuf, hlen, listp); } - if (prt->status & ERTS_PORT_SFLG_LINEBUF_IO){ + if (state & ERTS_PORT_SFLG_LINEBUF_IO){ listp = TUPLE2(hp, (eol) ? am_eol : am_noeol, listp); hp += 3; } tuple = TUPLE2(hp, am_data, listp); hp += 3; - tuple = TUPLE2(hp, prt->id, tuple); + tuple = TUPLE2(hp, prt->common.id, tuple); hp += 3; erts_queue_message(rp, &rp_locks, bp, tuple, am_undefined @@ -1726,7 +3029,8 @@ static void deliver_read_message(Port* prt, Eterm to, * Deliver all lines in a line buffer, repeats calls to * deliver_read_message, and takes the same parameters. */ -static void deliver_linebuf_message(Port* prt, Eterm to, +static void deliver_linebuf_message(Port* prt, erts_aint_t state, + Eterm to, char* hbuf, ErlDrvSizeT hlen, char *buf, ErlDrvSizeT len) { @@ -1735,7 +3039,7 @@ static void deliver_linebuf_message(Port* prt, Eterm to, if(init_linebuf_context(&lc,&(prt->linebuf), buf, len) < 0) return; while((ret = read_linebuf(&lc)) > LINEBUF_EMPTY) - deliver_read_message(prt, to, hbuf, hlen, LINEBUF_DATA(lc), + deliver_read_message(prt, state, to, hbuf, hlen, LINEBUF_DATA(lc), LINEBUF_DATALEN(lc), (ret == LINEBUF_EOL)); } @@ -1746,20 +3050,25 @@ static void deliver_linebuf_message(Port* prt, Eterm to, * Parameters: * prt - Pointer to a Port structure for this port. */ -static void flush_linebuf_messages(Port *prt) +static void flush_linebuf_messages(Port *prt, erts_aint32_t state) { LineBufContext lc; int ret; ERTS_SMP_LC_ASSERT(!prt || erts_lc_is_port_locked(prt)); - if(prt == NULL || !(prt->status & ERTS_PORT_SFLG_LINEBUF_IO)) + + if (!prt) + return; + + if (!(state & ERTS_PORT_SFLG_LINEBUF_IO)) return; if(init_linebuf_context(&lc,&(prt->linebuf), NULL, 0) < 0) return; while((ret = flush_linebuf(&lc)) > LINEBUF_EMPTY) deliver_read_message(prt, - prt->connected, + state, + ERTS_PORT_GET_CONNECTED(prt), NULL, 0, LINEBUF_DATA(lc), @@ -1787,6 +3096,7 @@ deliver_vec_message(Port* prt, /* Port */ ErlOffHeap *ohp; ErtsProcLocks rp_locks = 0; int scheduler = erts_get_scheduler_id() != 0; + erts_aint32_t state; ERTS_SMP_LC_ASSERT(erts_lc_is_port_locked(prt)); ERTS_SMP_CHK_NO_PROC_LOCKS; @@ -1802,12 +3112,13 @@ deliver_vec_message(Port* prt, /* Port */ if (!rp) return; + state = erts_atomic32_read_nob(&prt->state); /* * Calculate the exact number of heap words needed. */ need = 3 + 3; /* Heap space for two tuples */ - if (prt->status & ERTS_PORT_SFLG_BINARY_IO) { + if (state & ERTS_PORT_SFLG_BINARY_IO) { need += (2+PROC_BIN_SIZE)*vsize - 2 + hlen*2; } else { need += (hlen+csize)*2; @@ -1818,7 +3129,7 @@ deliver_vec_message(Port* prt, /* Port */ listp = NIL; iov += vsize; - if ((prt->status & ERTS_PORT_SFLG_BINARY_IO) == 0) { + if ((state & ERTS_PORT_SFLG_BINARY_IO) == 0) { Eterm* thp = hp; while (vsize--) { iov--; @@ -1871,7 +3182,7 @@ deliver_vec_message(Port* prt, /* Port */ tuple = TUPLE2(hp, am_data, listp); hp += 3; - tuple = TUPLE2(hp, prt->id, tuple); + tuple = TUPLE2(hp, prt->common.id, tuple); hp += 3; erts_queue_message(rp, &rp_locks, bp, tuple, am_undefined @@ -1904,7 +3215,7 @@ static void deliver_bin_message(Port* prt, /* port */ /* * Note. * - * The test for (p->status & ERTS_PORT_SFLGS_DEAD) == 0 is important since the + * The test for ERTS_PORT_SFLGS_DEAD is important since the * driver's flush function might call driver_async, which when using no * threads and being short circuited will notice that the io queue is empty * (after calling the driver's async_ready) and recursively call @@ -1920,7 +3231,7 @@ static void flush_port(Port *p) if (p->drv_ptr->flush != NULL) { #ifdef USE_VM_PROBES if (DTRACE_ENABLED(driver_flush)) { - DTRACE_FORMAT_COMMON_PID_AND_PORT(p->connected, p) + DTRACE_FORMAT_COMMON_PID_AND_PORT(ERTS_PORT_GET_CONNECTED(p), p) DTRACE3(driver_flush, process_str, port_str, p->name); } #endif @@ -1935,11 +3246,12 @@ static void flush_port(Port *p) } #ifdef ERTS_SMP if (p->xports) - erts_smp_xports_unlock(p); + erts_port_handle_xports(p); ASSERT(!p->xports); #endif } - if ((p->status & ERTS_PORT_SFLGS_DEAD) == 0 && is_port_ioq_empty(p)) { + if ((erts_atomic32_read_nob(&p->state) & ERTS_PORT_SFLGS_DEAD) == 0 + && is_port_ioq_empty(p)) { terminate_port(p); } } @@ -1951,29 +3263,29 @@ terminate_port(Port *prt) Eterm send_closed_port_id; Eterm connected_id = NIL /* Initialize to silence compiler */; erts_driver_t *drv; - int halt; + erts_aint32_t state; ERTS_SMP_CHK_NO_PROC_LOCKS; ERTS_SMP_LC_ASSERT(erts_lc_is_port_locked(prt)); - ASSERT(!prt->nlinks); - ASSERT(!prt->monitors); + ASSERT(!ERTS_P_LINKS(prt)); + ASSERT(!ERTS_P_MONITORS(prt)); - /* prt->status may be altered by kill_port()below */ - halt = (prt->status & ERTS_PORT_SFLG_HALT) != 0; - if (prt->status & ERTS_PORT_SFLG_SEND_CLOSED) { - erts_port_status_band_set(prt, ~ERTS_PORT_SFLG_SEND_CLOSED); - send_closed_port_id = prt->id; - connected_id = prt->connected; + /* state may be altered by kill_port() below */ + state = erts_atomic32_read_band_nob(&prt->state, + ~ERTS_PORT_SFLG_SEND_CLOSED); + if (state & ERTS_PORT_SFLG_SEND_CLOSED) { + send_closed_port_id = prt->common.id; + connected_id = ERTS_PORT_GET_CONNECTED(prt); } else { send_closed_port_id = NIL; } #ifdef ERTS_SMP - erts_cancel_smp_ptimer(prt->ptimer); + erts_cancel_smp_ptimer(prt->common.u.alive.ptimer); #else - erts_cancel_timer(&prt->tm); + erts_cancel_timer(&prt->common.u.alive.tm); #endif drv = prt->drv_ptr; @@ -1981,7 +3293,7 @@ terminate_port(Port *prt) int fpe_was_unmasked = erts_block_fpe(); #ifdef USE_VM_PROBES if (DTRACE_ENABLED(driver_stop)) { - DTRACE_FORMAT_COMMON_PID_AND_PORT(prt->connected, prt) + DTRACE_FORMAT_COMMON_PID_AND_PORT(connected_id, prt) DTRACE3(driver_stop, process_str, drv->name, port_str); } #endif @@ -1989,14 +3301,14 @@ terminate_port(Port *prt) erts_unblock_fpe(fpe_was_unmasked); #ifdef ERTS_SMP if (prt->xports) - erts_smp_xports_unlock(prt); + erts_port_handle_xports(prt); ASSERT(!prt->xports); #endif } if(drv->handle != NULL) { - erts_smp_mtx_lock(&erts_driver_list_lock); + erts_smp_rwmtx_rlock(&erts_driver_list_lock); erts_ddll_decrement_port_count(drv->handle); - erts_smp_mtx_unlock(&erts_driver_list_lock); + erts_smp_rwmtx_runlock(&erts_driver_list_lock); } stopq(prt); /* clear queue memory */ if(prt->linebuf != NULL){ @@ -2012,20 +3324,21 @@ terminate_port(Port *prt) if (prt->psd) erts_free(ERTS_ALC_T_PRTSD, prt->psd); + ASSERT(prt->dist_entry == NULL); + kill_port(prt); /* * We don't want to send the closed message until after the * port has been removed from the port table (in kill_port()). */ - if (halt && (erts_smp_atomic32_dec_read_nob(&erts_halt_progress) == 0)) { - erts_smp_port_unlock(prt); /* We will exit and never return */ + if ((state & ERTS_PORT_SFLG_HALT) + && (erts_smp_atomic32_dec_read_nob(&erts_halt_progress) == 0)) { + erts_port_release(prt); /* We will exit and never return */ erl_exit_flush_async(erts_halt_code, ""); } if (is_internal_port(send_closed_port_id)) deliver_result(send_closed_port_id, connected_id, am_closed); - - ASSERT(prt->dist_entry == NULL); } void @@ -2045,7 +3358,7 @@ static void sweep_one_monitor(ErtsMonitor *mon, void *vpsc) if (!rp) { goto done; } - rmon = erts_remove_monitor(&(rp->monitors),mon->ref); + rmon = erts_remove_monitor(&ERTS_P_MONITORS(rp), mon->ref); erts_smp_proc_unlock(rp, ERTS_PROC_LOCK_LINK); if (rmon == NULL) { goto done; @@ -2099,7 +3412,7 @@ static void sweep_one_link(ErtsLink *lnk, void *vpsc) ASSERT(is_internal_pid(lnk->pid)); rp = erts_pid2proc(NULL, 0, lnk->pid, rp_locks); if (rp) { - ErtsLink *rlnk = erts_remove_link(&(rp->nlinks), psc->port); + ErtsLink *rlnk = erts_remove_link(&ERTS_P_LINKS(rp), psc->port); if (rlnk) { int xres = erts_send_exit_signal(NULL, @@ -2135,11 +3448,13 @@ static void sweep_one_link(ErtsLink *lnk, void *vpsc) * that is to kill a port till reason kill. Then the port is stopped. * */ -void -erts_do_exit_port(Port *p, Eterm from, Eterm reason) + +int +erts_deliver_port_exit(Port *p, Eterm from, Eterm reason, int send_closed) { ErtsLink *lnk; Eterm rreason; + erts_aint32_t state; ERTS_SMP_CHK_NO_PROC_LOCKS; ERTS_SMP_LC_ASSERT(erts_lc_is_port_locked(p)); @@ -2159,66 +3474,76 @@ erts_do_exit_port(Port *p, Eterm from, Eterm reason) } #endif - if ((p->status & (ERTS_PORT_SFLGS_DEAD - | ERTS_PORT_SFLG_EXITING - | ERTS_PORT_SFLG_IMMORTAL)) - || ((reason == am_normal) && - ((from != p->connected) && (from != p->id)))) { - return; - } + state = erts_atomic32_read_nob(&p->state); + if (state & (ERTS_PORT_SFLGS_DEAD + | ERTS_PORT_SFLG_EXITING + | ERTS_PORT_SFLG_CLOSING)) + return 0; + + if (reason == am_normal && from != ERTS_PORT_GET_CONNECTED(p) && from != p->common.id) + return 0; + + if (send_closed) + erts_atomic32_read_bor_relb(&p->state, + ERTS_PORT_SFLG_SEND_CLOSED); if (IS_TRACED_FL(p, F_TRACE_PORTS)) { trace_port(p, am_closed, reason); } - erts_trace_check_exiting(p->id); + erts_trace_check_exiting(p->common.id); /* * Setting the port to not busy here, frees the list of pending * processes and makes them runnable. */ - set_busy_port((ErlDrvPort)internal_port_index(p->id), 0); + set_busy_port((ErlDrvPort) p, 0); - if (p->reg != NULL) - (void) erts_unregister_name(NULL, 0, p, p->reg->name); + if (p->common.u.alive.reg != NULL) + (void) erts_unregister_name(NULL, 0, p, p->common.u.alive.reg->name); - erts_port_status_bor_set(p, ERTS_PORT_SFLG_EXITING); + state = erts_atomic32_read_bor_relb(&p->state, ERTS_PORT_SFLG_EXITING); { - SweepContext sc = {p->id, rreason}; - lnk = p->nlinks; - p->nlinks = NULL; + SweepContext sc = {p->common.id, rreason}; + lnk = ERTS_P_LINKS(p); + ERTS_P_LINKS(p) = NULL; erts_sweep_links(lnk, &sweep_one_link, &sc); } DRV_MONITOR_LOCK_PDL(p); { - ErtsMonitor *moni = p->monitors; - p->monitors = NULL; + ErtsMonitor *moni = ERTS_P_MONITORS(p); + ERTS_P_MONITORS(p) = NULL; erts_sweep_monitors(moni, &sweep_one_monitor, NULL); } DRV_MONITOR_UNLOCK_PDL(p); - if ((p->status & ERTS_PORT_SFLG_DISTRIBUTION) && p->dist_entry) { + if ((state & ERTS_PORT_SFLG_DISTRIBUTION) && p->dist_entry) { erts_do_net_exits(p->dist_entry, rreason); erts_deref_dist_entry(p->dist_entry); - p->dist_entry = NULL; - erts_port_status_band_set(p, ~ERTS_PORT_SFLG_DISTRIBUTION); + p->dist_entry = NULL; + erts_atomic32_read_band_relb(&p->state, + ~ERTS_PORT_SFLG_DISTRIBUTION); } if ((reason != am_kill) && !is_port_ioq_empty(p)) { - erts_port_status_bandor_set(p, - ~ERTS_PORT_SFLG_EXITING, /* must turn it off */ - ERTS_PORT_SFLG_CLOSING); + /* must turn exiting flag off */ + erts_atomic32_read_bset_relb(&p->state, + (ERTS_PORT_SFLG_EXITING + | ERTS_PORT_SFLG_CLOSING), + ERTS_PORT_SFLG_CLOSING); flush_port(p); } else { terminate_port(p); } + + return 1; } /* About the states ERTS_PORT_SFLG_EXITING and ERTS_PORT_SFLG_CLOSING used above. ** -** ERTS_PORT_SFLG_EXITING is a recursion protection for erts_do_exit_port(). +** ERTS_PORT_SFLG_EXITING is a recursion protection for erts_deliver_port_exit(). ** It is unclear whether this state is necessary or not, it might be possible ** to merge it with ERTS_PORT_SFLG_CLOSING. ERTS_PORT_SFLG_EXITING only persists ** over a section of sequential (but highly recursive) code. @@ -2234,232 +3559,1108 @@ erts_do_exit_port(Port *p, Eterm from, Eterm reason) ** {PID, close} ** {PID, {command, io-list}} ** {PID, {connect, New_PID}} -** -** */ -void erts_port_command(Process *proc, - Eterm caller_id, - Port *port, - Eterm command) +ErtsPortOpResult +erts_port_command(Process *c_p, + int flags, + Port *port, + Eterm command, + Eterm *refp) { Eterm *tp; - Eterm pid; - if (!port) - return; + ASSERT(port); - erts_smp_proc_unlock(proc, ERTS_PROC_LOCK_MAIN); - ERTS_SMP_CHK_NO_PROC_LOCKS; - ASSERT(!INVALID_PORT(port, port->id)); + flags |= ERTS_PORT_SIG_FLG_BANG_OP; if (is_tuple_arity(command, 2)) { + Eterm cntd; tp = tuple_val(command); - if ((pid = port->connected) == tp[1]) { - /* PID must be connected */ + cntd = tp[1]; + if (is_internal_pid(cntd)) { if (tp[2] == am_close) { - erts_port_status_bor_set(port, ERTS_PORT_SFLG_SEND_CLOSED); - erts_do_exit_port(port, pid, am_normal); - -#ifdef USE_VM_PROBES - if(DTRACE_ENABLED(port_command)) { - DTRACE_FORMAT_COMMON_PROC_AND_PORT(proc, port) - DTRACE4(port_command, process_str, port_str, port->name, "close"); - } -#endif - goto done; + if (!erts_port_synchronous_ops) + refp = NULL; + flags &= ~ERTS_PORT_SIG_FLG_NOSUSPEND; + return erts_port_exit(c_p, flags, port, cntd, am_normal, refp); } else if (is_tuple_arity(tp[2], 2)) { tp = tuple_val(tp[2]); if (tp[1] == am_command) { - if (erts_write_to_port(caller_id, port, tp[2]) == 0) - goto done; - } else if ((tp[1] == am_connect) && is_internal_pid(tp[2])) { -#ifdef USE_VM_PROBES - if(DTRACE_ENABLED(port_command)) { - DTRACE_FORMAT_COMMON_PROC_AND_PORT(proc, port) - DTRACE4(port_command, process_str, port_str, port->name, "connect"); - } -#endif - port->connected = tp[2]; - deliver_result(port->id, pid, am_connected); - goto done; + if (!(flags & ERTS_PORT_SIG_FLG_NOSUSPEND) + && !erts_port_synchronous_ops) + refp = NULL; + return erts_port_output(c_p, flags, port, cntd, tp[2], refp); + } + else if (tp[1] == am_connect) { + if (!erts_port_synchronous_ops) + refp = NULL; + flags &= ~ERTS_PORT_SIG_FLG_NOSUSPEND; + return erts_port_connect(c_p, flags, port, cntd, tp[2], refp); } } } } - { - ErtsProcLocks rp_locks = ERTS_PROC_LOCKS_XSIG_SEND; - Process* rp = erts_pid2proc(NULL, 0, - port->connected, rp_locks); - if (rp) { - (void) erts_send_exit_signal(NULL, - port->id, - rp, - &rp_locks, - am_badsig, - NIL, - NULL, - 0); - erts_smp_proc_unlock(rp, rp_locks); - } + /* badsig */ + if (!erts_port_synchronous_ops) + refp = NULL; + flags &= ~ERTS_PORT_SIG_FLG_NOSUSPEND; + return bad_port_signal(c_p, flags, port, c_p->common.id, refp, am_command); +} + +static ERTS_INLINE ErtsPortOpResult +call_driver_control(Eterm caller, + Port *prt, + unsigned int command, + char *bufp, + ErlDrvSizeT size, + char **resp_bufp, + ErlDrvSizeT *from_size) +{ + ErlDrvSSizeT cres; + + if (!prt->drv_ptr->control) + return ERTS_PORT_OP_BADARG; + +#ifdef USE_VM_PROBES + if (DTRACE_ENABLED(port_control) || DTRACE_ENABLED(driver_control)) { + DTRACE_FORMAT_COMMON_PID_AND_PORT(caller, prt); + DTRACE4(port_control, process_str, port_str, prt->name, command); + DTRACE5(driver_control, process_str, port_str, prt->name, + command, size); } - done: - erts_smp_proc_lock(proc, ERTS_PROC_LOCK_MAIN); +#endif + + prt->caller = caller; + cres = prt->drv_ptr->control((ErlDrvData) prt->drv_data, + command, + bufp, + size, + resp_bufp, + *from_size); + prt->caller = NIL; + + if (cres < 0) + return ERTS_PORT_OP_BADARG; + + *from_size = (ErlDrvSizeT) cres; + + return ERTS_PORT_OP_DONE; } -/* - * Control a port synchronously. - * Returns either a list or a binary. - */ -Eterm -erts_port_control(Process* p, Port* prt, Uint command, Eterm iolist) -{ - byte* to_port = NULL; /* Buffer to write to port. */ - /* Initialization is for shutting up - warning about use before set. */ - Uint to_len = 0; /* Length of buffer. */ - int must_free = 0; /* True if the buffer should be freed. */ - char port_result[ERL_ONHEAP_BIN_LIMIT]; /* Default buffer for result from port. */ - char* port_resp; /* Pointer to result buffer. */ - ErlDrvSSizeT n; - ErlDrvSSizeT (*control) - (ErlDrvData, unsigned, char*, ErlDrvSizeT, char**, ErlDrvSizeT); - int fpe_was_unmasked; +static void +cleanup_scheduled_control(Binary *binp, char *bufp) +{ + if (binp) { + if (erts_refc_dectest(&binp->refc, 0) == 0) + erts_bin_free(binp); + } + else { + if (bufp) + erts_free(ERTS_ALC_T_DRV_CTRL_DATA, bufp); + } +} - ERTS_SMP_LC_ASSERT(erts_lc_is_port_locked(prt)); - if ((control = prt->drv_ptr->control) == NULL) { - return THE_NON_VALUE; +static ERTS_INLINE Uint +port_control_result_size(int control_flags, + char *resp_bufp, + ErlDrvSizeT *resp_size, + char *pre_alloc_buf) +{ + if (!resp_bufp) + return (Uint) 0; + + if (control_flags & PORT_CONTROL_FLAG_BINARY) { + if (resp_bufp != pre_alloc_buf) { + ErlDrvBinary *dbin = (ErlDrvBinary *) resp_bufp; + *resp_size = dbin->orig_size; + if (*resp_size > ERL_ONHEAP_BIN_LIMIT) + return PROC_BIN_SIZE; + } + ASSERT(*resp_size <= ERL_ONHEAP_BIN_LIMIT); + return (Uint) heap_bin_size((*resp_size)); } - /* - * Convert the iolist to a buffer, pointed to by to_port, - * and with its length in to_len. - */ - if (is_binary(iolist) && binary_bitoffset(iolist) == 0) { + return (Uint) 2*(*resp_size); +} + +static ERTS_INLINE Eterm +write_port_control_result(int control_flags, + char *resp_bufp, + ErlDrvSizeT resp_size, + char *pre_alloc_buf, + Eterm **hpp, + ErlHeapFragment *bp, + ErlOffHeap *ohp) +{ + Eterm res; + if (!resp_bufp) + return NIL; + if (control_flags & PORT_CONTROL_FLAG_BINARY) { + /* Binary result */ + ErlDrvBinary *dbin; + ErlHeapBin *hbin; + + if (resp_bufp == pre_alloc_buf) + dbin = NULL; + else { + dbin = (ErlDrvBinary *) resp_bufp; + if (dbin->orig_size > ERL_ONHEAP_BIN_LIMIT) { + ProcBin* pb = (ProcBin *) *hpp; + *hpp += PROC_BIN_SIZE; + pb->thing_word = HEADER_PROC_BIN; + pb->size = dbin->orig_size; + pb->next = ohp->first; + ohp->first = (struct erl_off_heap_header *) pb; + pb->val = ErlDrvBinary2Binary(dbin); + pb->bytes = (byte*) dbin->orig_bytes; + pb->flags = 0; + OH_OVERHEAD(ohp, dbin->orig_size / sizeof(Eterm)); + return make_binary(pb); + } + resp_bufp = dbin->orig_bytes; + resp_size = dbin->orig_size; + } + + hbin = (ErlHeapBin *) *hpp; + *hpp += heap_bin_size(resp_size); + ASSERT(resp_size <= ERL_ONHEAP_BIN_LIMIT); + hbin->thing_word = header_heap_bin(resp_size); + hbin->size = resp_size; + sys_memcpy(hbin->data, resp_bufp, resp_size); + if (dbin) + driver_free_binary(dbin); + return make_binary(hbin); + } + + /* List result */ + res = buf_to_intlist(hpp, resp_bufp, resp_size, NIL); + if (resp_bufp != pre_alloc_buf) + driver_free(resp_bufp); + return res; +} + +static int +port_sig_control(Port *prt, + erts_aint32_t state, + int op, + ErtsProc2PortSigData *sigdp) +{ + ASSERT(sigdp->flags & ERTS_P2P_SIG_DATA_FLG_REPLY); + + if (op == ERTS_PROC2PORT_SIG_EXEC) { + char resp_buf[ERL_ONHEAP_BIN_LIMIT]; + ErlDrvSizeT resp_size = sizeof(resp_buf); + char *resp_bufp = &resp_buf[0]; + ErtsPortOpResult res; + + res = call_driver_control(sigdp->caller, + prt, + sigdp->u.control.command, + sigdp->u.control.bufp, + sigdp->u.control.size, + &resp_bufp, + &resp_size); + + if (res == ERTS_PORT_OP_DONE) { + Eterm msg; + Eterm *hp, *hp_start; + ErlHeapFragment *bp; + ErlOffHeap *ohp; + Process *rp; + ErtsProcLocks rp_locks = 0; + Uint hsz; + int control_flags; + + rp = erts_proc_lookup_raw(sigdp->caller); + if (!rp) + goto done; + + control_flags = prt->control_flags; + + hsz = ERTS_QUEUE_PORT_SCHED_OP_REPLY_SIZE; + hsz += port_control_result_size(control_flags, + resp_bufp, + &resp_size, + &resp_buf[0]); + + hp_start = hp = erts_alloc_message_heap(hsz, + &bp, + &ohp, + rp, + &rp_locks); + + msg = write_port_control_result(control_flags, + resp_bufp, + resp_size, + &resp_buf[0], + &hp, + bp, + ohp); + + queue_port_sched_op_reply(rp, + &rp_locks, + hp_start, + hp, + hsz, + bp, + sigdp->ref, + msg); + + if (rp_locks) + erts_smp_proc_unlock(rp, rp_locks); + goto done; + } + } + + /* failure */ + + port_sched_op_reply(sigdp->caller, sigdp->ref, am_badarg); + +done: + + cleanup_scheduled_control(sigdp->u.control.binp, + sigdp->u.control.bufp); + + return ERTS_PORT_REDS_CONTROL; +} + + +ErtsPortOpResult +erts_port_control(Process* c_p, + Port *prt, + unsigned int command, + Eterm data, + Eterm *retvalp) +{ + ErtsPortOpResult res; + char *bufp = NULL; + ErlDrvSizeT size = 0; + int try_call; + int tmp_alloced = 0; + erts_aint32_t sched_flags; + Binary *binp; + int copy; + ErtsProc2PortSigData *sigdp; + + sched_flags = erts_smp_atomic32_read_nob(&prt->sched.flags); + if (sched_flags & ERTS_PTS_FLG_EXIT) + return ERTS_PORT_OP_BADARG; + + try_call = !(sched_flags & ERTS_PTS_FLGS_FORCE_SCHEDULE_OP); + + if (is_binary(data) && binary_bitoffset(data) == 0) { + byte *bytep; ERTS_DECLARE_DUMMY(Uint bitoffs); ERTS_DECLARE_DUMMY(Uint bitsize); - ERTS_GET_BINARY_BYTES(iolist, to_port, bitoffs, bitsize); - to_len = binary_size(iolist); + ERTS_GET_BINARY_BYTES(data, bytep, bitoffs, bitsize); + bufp = (char *) bytep; + size = binary_size(data); } else { int r; - /* Try with an 8KB buffer first (will often be enough I guess). */ - to_len = 8*1024; - to_port = erts_alloc(ERTS_ALC_T_TMP, to_len); - must_free = 1; + if (!try_call) { + if (erts_iolist_size(data, &size)) + return ERTS_PORT_OP_BADARG; + bufp = erts_alloc(ERTS_ALC_T_DRV_CTRL_DATA, size); + r = erts_iolist_to_buf(data, bufp, size); + ASSERT(r == 0); + } + else { + /* Try with an 8KB buffer first (will often be enough I guess). */ + size = 8*1024; + bufp = erts_alloc(ERTS_ALC_T_TMP, size); + tmp_alloced = 1; + + r = erts_iolist_to_buf(data, bufp, size); + if (ERTS_IOLIST_TO_BUF_SUCCEEDED(r)) { + size -= r; + } else { + if (r == ERTS_IOLIST_TO_BUF_TYPE_ERROR) { /* Type error */ + erts_free(ERTS_ALC_T_TMP, bufp); + return ERTS_PORT_OP_BADARG; + } + else { + ASSERT(r == ERTS_IOLIST_TO_BUF_OVERFLOW); /* Overflow */ + erts_free(ERTS_ALC_T_TMP, bufp); + if (erts_iolist_size(data, &size)) + return ERTS_PORT_OP_BADARG; /* Type error */ + } + bufp = erts_alloc(ERTS_ALC_T_TMP, size); + r = erts_iolist_to_buf(data, bufp, size); + ASSERT(r == 0); + } + } + } - /* - * In versions before R10B, we used to reserve random - * amounts of extra memory. From R10B, we allocate the - * exact amount. - */ - r = io_list_to_buf(iolist, (char*) to_port, to_len); - if (r >= 0) { - to_len -= r; - } else if (r == -2) { /* Type error */ - erts_free(ERTS_ALC_T_TMP, (void *) to_port); - return THE_NON_VALUE; - } else { - ASSERT(r == -1); /* Overflow */ - erts_free(ERTS_ALC_T_TMP, (void *) to_port); - if (erts_iolist_size(iolist, &to_len)) { /* Type error */ - return THE_NON_VALUE; + if (try_call) { + char resp_buf[ERL_ONHEAP_BIN_LIMIT]; + char* resp_bufp = &resp_buf[0]; + ErlDrvSizeT resp_size = sizeof(resp_buf); + ErtsTryImmDrvCallResult try_call_res; + ErtsTryImmDrvCallState try_call_state + = ERTS_INIT_TRY_IMM_DRV_CALL_STATE( + c_p, + prt, + ERTS_PORT_SFLGS_INVALID_LOOKUP, + 0, + 0, + am_control); + + try_call_res = try_imm_drv_call(&try_call_state); + switch (try_call_res) { + case ERTS_TRY_IMM_DRV_CALL_OK: { + Eterm *hp; + Uint hsz; + int control_flags; + + res = call_driver_control(c_p->common.id, + prt, + command, + bufp, + size, + &resp_bufp, + &resp_size); + finalize_imm_drv_call(&try_call_state); + if (tmp_alloced) + erts_free(ERTS_ALC_T_TMP, bufp); + if (res == ERTS_PORT_OP_BADARG) { + return ERTS_PORT_OP_BADARG; } - must_free = 1; - to_port = erts_alloc(ERTS_ALC_T_TMP, to_len); - r = io_list_to_buf(iolist, (char*) to_port, to_len); - ASSERT(r == 0); + + control_flags = prt->control_flags; + + hsz = port_control_result_size(control_flags, + resp_bufp, + &resp_size, + &resp_buf[0]); + hp = HAlloc(c_p, hsz); + *retvalp = write_port_control_result(control_flags, + resp_bufp, + resp_size, + &resp_buf[0], + &hp, + NULL, + &c_p->off_heap); + return ERTS_PORT_OP_DONE; + } + case ERTS_TRY_IMM_DRV_CALL_INVALID_PORT: + if (tmp_alloced) + erts_free(ERTS_ALC_T_TMP, bufp); + return ERTS_PORT_OP_BADARG; + default: + /* Schedule control() call instead... */ + break; } } - prt->caller = p->id; /* Internal pid */ + /* Convert data into something that can be scheduled */ - erts_smp_proc_unlock(p, ERTS_PROC_LOCK_MAIN); - ERTS_SMP_CHK_NO_PROC_LOCKS; + copy = tmp_alloced; + + binp = NULL; + + if (is_binary(data) && binary_bitoffset(data) == 0) { + Eterm *ebinp = binary_val_rel(data, NULL); + ASSERT(!tmp_alloced); + if (*ebinp == HEADER_SUB_BIN) + ebinp = binary_val_rel(((ErlSubBin *) ebinp)->orig, NULL); + if (*ebinp != HEADER_PROC_BIN) + copy = 1; + else { + binp = ((ProcBin *) ebinp)->val; + ASSERT(bufp < bufp + size); + ASSERT(binp->orig_bytes <= bufp + && bufp + size <= binp->orig_bytes + binp->orig_size); + erts_refc_inc(&binp->refc, 1); + } + } + + if (copy) { + char *old_bufp = bufp; + bufp = erts_alloc(ERTS_ALC_T_DRV_CTRL_DATA, size); + sys_memcpy(bufp, old_bufp, size); + if (tmp_alloced) + erts_free(ERTS_ALC_T_TMP, old_bufp); + } + + sigdp = erts_port_task_alloc_p2p_sig_data(); + sigdp->flags = ERTS_P2P_SIG_TYPE_CONTROL; + sigdp->u.control.binp = binp; + sigdp->u.control.command = command; + sigdp->u.control.bufp = bufp; + sigdp->u.control.size = size; + + res = erts_schedule_proc2port_signal(c_p, + prt, + c_p->common.id, + retvalp, + sigdp, + 0, + port_sig_control); + if (res != ERTS_PORT_OP_SCHEDULED) { + cleanup_scheduled_control(binp, bufp); + return ERTS_PORT_OP_BADARG; + } + return res; +} + +static ERTS_INLINE ErtsPortOpResult +call_driver_call(Eterm caller, + Port *prt, + unsigned int command, + char *bufp, + ErlDrvSizeT size, + char **resp_bufp, + ErlDrvSizeT *from_size, + unsigned *ret_flagsp) +{ + ErlDrvSSizeT cres; + + if (!prt->drv_ptr->call) + return ERTS_PORT_OP_BADARG; #ifdef USE_VM_PROBES - if (DTRACE_ENABLED(port_control) || DTRACE_ENABLED(driver_control)) { - DTRACE_FORMAT_COMMON_PROC_AND_PORT(p, prt); - DTRACE4(port_control, process_str, port_str, prt->name, command); - DTRACE5(driver_control, process_str, port_str, prt->name, - command, to_len); + if (DTRACE_ENABLED(driver_call)) { + DTRACE_CHARBUF(process_str, DTRACE_TERM_BUF_SIZE); + DTRACE_CHARBUF(port_str, DTRACE_TERM_BUF_SIZE); + + dtrace_pid_str(caller, process_str); + dtrace_port_str(prt, port_str); + DTRACE5(driver_call, process_str, port_str, prt->name, command, size); } #endif - /* - * Call the port's control routine. - */ + prt->caller = caller; + cres = prt->drv_ptr->call((ErlDrvData) prt->drv_data, + command, + bufp, + size, + resp_bufp, + *from_size, + ret_flagsp); + prt->caller = NIL; - port_resp = port_result; - fpe_was_unmasked = erts_block_fpe(); - n = control((ErlDrvData)prt->drv_data, command, (char*)to_port, to_len, - &port_resp, sizeof(port_result)); - erts_unblock_fpe(fpe_was_unmasked); - if (must_free) { - erts_free(ERTS_ALC_T_TMP, (void *) to_port); + if (cres <= 0 + || ((byte) (*resp_bufp)[0]) != VERSION_MAGIC) + return ERTS_PORT_OP_BADARG; + + *from_size = (ErlDrvSizeT) cres; + + return ERTS_PORT_OP_DONE; +} + + +static +void cleanup_scheduled_call(char *bufp) +{ + if (bufp) + erts_free(ERTS_ALC_T_DRV_CALL_DATA, bufp); +} + +static int +port_sig_call(Port *prt, + erts_aint32_t state, + int op, + ErtsProc2PortSigData *sigdp) +{ + char resp_buf[256]; + ErlDrvSizeT resp_size = sizeof(resp_buf); + char *resp_bufp = &resp_buf[0]; + unsigned ret_flags = 0U; + + + ASSERT(sigdp->flags & ERTS_P2P_SIG_DATA_FLG_REPLY); + + if (op == ERTS_PROC2PORT_SIG_EXEC) { + ErtsPortOpResult res; + + res = call_driver_call(sigdp->caller, + prt, + sigdp->u.call.command, + sigdp->u.call.bufp, + sigdp->u.call.size, + &resp_bufp, + &resp_size, + &ret_flags); + + if (res == ERTS_PORT_OP_DONE) { + Eterm msg; + Eterm *hp; + ErlHeapFragment *bp; + ErlOffHeap *ohp; + Process *rp; + ErtsProcLocks rp_locks = 0; + Uint hsz; + + rp = erts_proc_lookup_raw(sigdp->caller); + if (!rp) + goto done; + + hsz = erts_decode_ext_size((byte *) resp_bufp, resp_size); + if (hsz >= 0) { + Eterm *hp_start; + byte *endp; + + hsz += 3; /* ok tuple */ + hsz += ERTS_QUEUE_PORT_SCHED_OP_REPLY_SIZE; + + hp_start = hp = erts_alloc_message_heap(hsz, + &bp, + &ohp, + rp, + &rp_locks); + endp = (byte *) resp_bufp; + msg = erts_decode_ext(&hp, ohp, &endp); + if (is_value(msg)) { + msg = TUPLE2(hp, am_ok, msg); + hp += 3; + + queue_port_sched_op_reply(rp, + &rp_locks, + hp_start, + hp, + hsz, + bp, + sigdp->ref, + msg); + + if (rp_locks) + erts_smp_proc_unlock(rp, rp_locks); + goto done; + } + if (bp) + free_message_buffer(bp); + if (rp_locks) + erts_smp_proc_unlock(rp, rp_locks); + } + } } - prt->caller = NIL; -#ifdef ERTS_SMP - if (prt->xports) - erts_smp_xports_unlock(prt); - ASSERT(!prt->xports); -#endif - erts_smp_proc_lock(p, ERTS_PROC_LOCK_MAIN); - /* - * Handle the result. - */ + port_sched_op_reply(sigdp->caller, sigdp->ref, am_badarg); + +done: - if (n < 0) { - return THE_NON_VALUE; + if (resp_bufp != &resp_buf[0] && !(ret_flags & DRIVER_CALL_KEEP_BUFFER)) + driver_free(resp_bufp); + + cleanup_scheduled_call(sigdp->u.call.bufp); + + return ERTS_PORT_REDS_CALL; +} + + +ErtsPortOpResult +erts_port_call(Process* c_p, + Port *prt, + unsigned int command, + Eterm data, + Eterm *retvalp) +{ + ErtsPortOpResult res; + char input_buf[256]; + char *bufp; + byte *endp; + ErlDrvSizeT size; + int try_call; + erts_aint32_t sched_flags; + ErtsProc2PortSigData *sigdp; + + sched_flags = erts_smp_atomic32_read_nob(&prt->sched.flags); + if (sched_flags & ERTS_PTS_FLG_EXIT) { + return ERTS_PORT_OP_BADARG; } - if ((prt->control_flags & PORT_CONTROL_FLAG_BINARY) == 0) { /* List result */ - Eterm ret; - Eterm* hp = HAlloc(p, 2*n); - ret = buf_to_intlist(&hp, port_resp, n, NIL); - if (port_resp != port_result) { - driver_free(port_resp); + try_call = !(sched_flags & ERTS_PTS_FLGS_FORCE_SCHEDULE_OP); + + size = erts_encode_ext_size(data); + + if (!try_call) + bufp = erts_alloc(ERTS_ALC_T_DRV_CALL_DATA, size); + else if (size <= sizeof(input_buf)) + bufp = &input_buf[0]; + else + bufp = erts_alloc(ERTS_ALC_T_TMP, size); + + endp = (byte *) bufp; + erts_encode_ext(data, &endp); + + if (endp - (byte *) bufp > size) + ERTS_INTERNAL_ERROR("erts_internal:port_call() - Buffer overflow"); + + size = endp - (byte *) bufp; + + if (try_call) { + char resp_buf[255]; + char* resp_bufp = &resp_buf[0]; + ErlDrvSizeT resp_size = sizeof(resp_buf); + ErtsTryImmDrvCallResult try_call_res; + ErtsTryImmDrvCallState try_call_state + = ERTS_INIT_TRY_IMM_DRV_CALL_STATE( + c_p, + prt, + ERTS_PORT_SFLGS_INVALID_LOOKUP, + 0, + 0, + am_call); + + try_call_res = try_imm_drv_call(&try_call_state); + switch (try_call_res) { + case ERTS_TRY_IMM_DRV_CALL_OK: { + Eterm *hp, *hp_end; + Uint hsz; + unsigned ret_flags = 0U; + Eterm term; + + res = call_driver_call(c_p->common.id, + prt, + command, + bufp, + size, + &resp_bufp, + &resp_size, + &ret_flags); + + finalize_imm_drv_call(&try_call_state); + if (bufp != &input_buf[0]) + erts_free(ERTS_ALC_T_TMP, bufp); + if (res == ERTS_PORT_OP_BADARG) + return ERTS_PORT_OP_BADARG; + hsz = erts_decode_ext_size((byte *) resp_bufp, resp_size); + if (hsz < 0) + return ERTS_PORT_OP_BADARG; + hsz += 3; + hp = HAlloc(c_p, hsz); + hp_end = hp + hsz; + endp = (byte *) resp_bufp; + term = erts_decode_ext(&hp, &MSO(c_p), &endp); + if (term == THE_NON_VALUE) + return ERTS_PORT_OP_BADARG; + *retvalp = TUPLE2(hp, am_ok, term); + hp += 3; + HRelease(c_p, hp_end, hp); + if (resp_buf != &resp_buf[0] + && !(ret_flags & DRIVER_CALL_KEEP_BUFFER)) + driver_free(resp_buf); + return ERTS_PORT_OP_DONE; } - return ret; - } - else if (port_resp == NULL) { - return NIL; - } - else { /* Binary result */ - ErlDrvBinary *dbin; - ErlHeapBin *hbin; - if (port_resp != port_result) { - dbin = (ErlDrvBinary *) port_resp; - if (dbin->orig_size > ERL_ONHEAP_BIN_LIMIT) { - ProcBin* pb = (ProcBin *) HAlloc(p, PROC_BIN_SIZE); - pb->thing_word = HEADER_PROC_BIN; - pb->size = dbin->orig_size; - pb->next = MSO(p).first; - MSO(p).first = (struct erl_off_heap_header*)pb; - pb->val = ErlDrvBinary2Binary(dbin); - pb->bytes = (byte*) dbin->orig_bytes; - pb->flags = 0; - OH_OVERHEAD(&(MSO(p)), dbin->orig_size / sizeof(Eterm)); - return make_binary(pb); - } - port_resp = dbin->orig_bytes; - n = dbin->orig_size; - } else { - dbin = NULL; + case ERTS_TRY_IMM_DRV_CALL_INVALID_PORT: + if (bufp != &input_buf[0]) + erts_free(ERTS_ALC_T_TMP, bufp); + return ERTS_PORT_OP_BADARG; + default: + /* Schedule call() call instead... */ + break; } - hbin = (ErlHeapBin*) HAlloc(p, heap_bin_size(n)); - ASSERT(n <= ERL_ONHEAP_BIN_LIMIT); - hbin->thing_word = header_heap_bin(n); - hbin->size = n; - sys_memcpy(hbin->data, port_resp, n); - if (dbin != NULL) { - driver_free_binary(dbin); + } + + /* Convert data into something that can be scheduled */ + + if (bufp == &input_buf[0] || try_call) { + char *new_bufp = erts_alloc(ERTS_ALC_T_DRV_CALL_DATA, size); + sys_memcpy(new_bufp, bufp, size); + if (bufp != &input_buf[0]) + erts_free(ERTS_ALC_T_TMP, bufp); + bufp = new_bufp; + } + + sigdp = erts_port_task_alloc_p2p_sig_data(); + sigdp->flags = ERTS_P2P_SIG_TYPE_CALL; + sigdp->u.call.command = command; + sigdp->u.call.bufp = bufp; + sigdp->u.call.size = size; + + res = erts_schedule_proc2port_signal(c_p, + prt, + c_p->common.id, + retvalp, + sigdp, + 0, + port_sig_call); + if (res != ERTS_PORT_OP_SCHEDULED) { + cleanup_scheduled_call(bufp); + return ERTS_PORT_OP_BADARG; + } + return res; +} + +static Eterm +make_port_info_term(Eterm **hpp_start, + Eterm **hpp, + Uint *hszp, + ErlHeapFragment **bpp, + Port *prt, + Eterm item) +{ + ErlOffHeap *ohp; + + if (is_value(item)) { + if (erts_bld_port_info(NULL, NULL, hszp, prt, item) == am_false) + return THE_NON_VALUE; + if (*hszp) { + *bpp = new_message_buffer(*hszp); + *hpp_start = *hpp = (*bpp)->mem; + ohp = &(*bpp)->off_heap; } - return make_binary(hbin); + else { + *bpp = NULL; + *hpp_start = *hpp = NULL; + ohp = NULL; + } + return erts_bld_port_info(hpp, ohp, NULL, prt, item); + } + else { + int i; + int len; + int start; + static Eterm item[] = ERTS_PORT_INFO_1_ITEMS; + static Eterm value[sizeof(item)/sizeof(item[0])]; + + start = 0; + len = sizeof(item)/sizeof(item[0]); + + for (i = start; i < sizeof(item)/sizeof(item[0]); i++) { + ASSERT(is_atom(item[i])); + value[i] = erts_bld_port_info(NULL, NULL, hszp, prt, item[i]); + } + + if (value[0] == am_undefined) { + start++; + len--; + } + + erts_bld_list(NULL, hszp, len, &value[start]); + + *bpp = new_message_buffer(*hszp); + *hpp_start = *hpp = (*bpp)->mem; + ohp = &(*bpp)->off_heap; + + for (i = start; i < sizeof(item)/sizeof(item[0]); i++) + value[i] = erts_bld_port_info(hpp, ohp, NULL, prt, item[i]); + + return erts_bld_list(hpp, NULL, len, &value[start]); + } +} + +static int +port_sig_info(Port *prt, + erts_aint32_t state, + int op, + ErtsProc2PortSigData *sigdp) +{ + ASSERT(sigdp->flags & ERTS_P2P_SIG_DATA_FLG_REPLY); + if (op != ERTS_PROC2PORT_SIG_EXEC) + port_sched_op_reply(sigdp->caller, sigdp->ref, am_undefined); + else { + Eterm *hp, *hp_start; + Uint hsz; + ErlHeapFragment *bp; + Eterm value; + Process *rp; + ErtsProcLocks rp_locks = 0; + + rp = erts_proc_lookup_raw(sigdp->caller); + if (!rp) + return ERTS_PORT_REDS_INFO; + + hsz = ERTS_QUEUE_PORT_SCHED_OP_REPLY_SIZE; + value = make_port_info_term(&hp_start, + &hp, + &hsz, + &bp, + prt, + sigdp->u.info.item); + if (is_value(value)) { + queue_port_sched_op_reply(rp, + &rp_locks, + hp_start, + hp, + hsz, + bp, + sigdp->ref, + value); + } + if (rp_locks) + erts_smp_proc_unlock(rp, rp_locks); + } + return ERTS_PORT_REDS_INFO; +} + +ErtsPortOpResult +erts_port_info(Process* c_p, + Port *prt, + Eterm item, + Eterm *retvalp) +{ + ErtsProc2PortSigData *sigdp; + ErtsTryImmDrvCallResult try_call_res; + ErtsTryImmDrvCallState try_call_state + = ERTS_INIT_TRY_IMM_DRV_CALL_STATE( + c_p, + prt, + ERTS_PORT_SFLGS_INVALID_LOOKUP, + 0, + 0, + am_info); + + try_call_res = try_imm_drv_call(&try_call_state); + switch (try_call_res) { + case ERTS_TRY_IMM_DRV_CALL_OK: { + Eterm *hp, *hp_start; + ErlHeapFragment *bp; + Uint hsz = 0; + Eterm value = make_port_info_term(&hp_start, &hp, &hsz, &bp, prt, item); + finalize_imm_drv_call(&try_call_state); + if (is_non_value(value)) + return ERTS_PORT_OP_BADARG; + else if (is_immed(value)) + *retvalp = value; + else { + Uint used_h_size = hp - hp_start; + hp = HAlloc(c_p, used_h_size); + *retvalp = copy_struct(value, used_h_size, &hp, &MSO(c_p)); + free_message_buffer(bp); + } + return ERTS_PORT_OP_DONE; + } + case ERTS_TRY_IMM_DRV_CALL_INVALID_PORT: + return ERTS_PORT_OP_DROPPED; + case ERTS_TRY_IMM_DRV_CALL_INVALID_SCHED_FLAGS: + case ERTS_TRY_IMM_DRV_CALL_BUSY_LOCK: + /* Schedule call instead... */ + break; + } + + sigdp = erts_port_task_alloc_p2p_sig_data(); + sigdp->flags = ERTS_P2P_SIG_TYPE_INFO; + sigdp->u.info.item = item; + + return erts_schedule_proc2port_signal(c_p, + prt, + c_p->common.id, + retvalp, + sigdp, + 0, + port_sig_info); +} + +static int +port_sig_set_data(Port *prt, + erts_aint32_t state, + int op, + ErtsProc2PortSigData *sigdp) +{ + ASSERT(sigdp->flags & ERTS_P2P_SIG_DATA_FLG_REPLY); + + if (op == ERTS_PROC2PORT_SIG_EXEC) { + if (prt->bp) + free_message_buffer(prt->bp); + prt->bp = sigdp->u.set_data.bp; + prt->data = sigdp->u.set_data.data; + port_sched_op_reply(sigdp->caller, sigdp->ref, am_true); + } + else { + if (sigdp->u.set_data.bp) + free_message_buffer(sigdp->u.set_data.bp); + port_sched_op_reply(sigdp->caller, sigdp->ref, am_badarg); + } + return ERTS_PORT_REDS_SET_DATA; +} + +ErtsPortOpResult +erts_port_set_data(Process* c_p, + Port *prt, + Eterm data, + Eterm *refp) +{ + ErtsPortOpResult res; + Eterm set_data; + ErlHeapFragment *bp; + ErtsProc2PortSigData *sigdp; + ErtsTryImmDrvCallResult try_call_res; + ErtsTryImmDrvCallState try_call_state + = ERTS_INIT_TRY_IMM_DRV_CALL_STATE( + c_p, + prt, + ERTS_PORT_SFLGS_INVALID_LOOKUP, + 0, + !refp, + am_set_data); + + if (is_immed(data)) { + set_data = data; + bp = NULL; + } + else { + Eterm *hp; + Uint sz = size_object(data); + bp = new_message_buffer(sz); + hp = bp->mem; + set_data = copy_struct(data, sz, &hp, &bp->off_heap); + } + + try_call_res = try_imm_drv_call(&try_call_state); + switch (try_call_res) { + case ERTS_TRY_IMM_DRV_CALL_OK: + if (prt->bp) + free_message_buffer(prt->bp); + prt->bp = bp; + prt->data = set_data; + finalize_imm_drv_call(&try_call_state); + return ERTS_PORT_OP_DONE; + case ERTS_TRY_IMM_DRV_CALL_INVALID_PORT: + return ERTS_PORT_OP_DROPPED; + case ERTS_TRY_IMM_DRV_CALL_INVALID_SCHED_FLAGS: + case ERTS_TRY_IMM_DRV_CALL_BUSY_LOCK: + /* Schedule call instead... */ + break; + } + + sigdp = erts_port_task_alloc_p2p_sig_data(); + sigdp->flags = ERTS_P2P_SIG_TYPE_SET_DATA; + sigdp->u.set_data.data = set_data; + sigdp->u.set_data.bp = bp; + + res = erts_schedule_proc2port_signal(c_p, + prt, + c_p->common.id, + refp, + sigdp, + 0, + port_sig_set_data); + if (res != ERTS_PORT_OP_SCHEDULED && bp) + free_message_buffer(bp); + return res; +} + +static int +port_sig_get_data(Port *prt, + erts_aint32_t state, + int op, + ErtsProc2PortSigData *sigdp) +{ + ASSERT(sigdp->flags & ERTS_P2P_SIG_DATA_FLG_REPLY); + if (op != ERTS_PROC2PORT_SIG_EXEC) + port_sched_op_reply(sigdp->caller, sigdp->ref, am_badarg); + else { + Process *rp; + ErtsProcLocks rp_locks = 0; + + rp = erts_proc_lookup_raw(sigdp->caller); + if (rp) { + Uint hsz; + Eterm *hp, *hp_start; + Eterm data, msg; + ErlHeapFragment *bp; + ErlOffHeap *ohp; + + hsz = ERTS_QUEUE_PORT_SCHED_OP_REPLY_SIZE; + hsz += 3; + if (prt->bp) + hsz += prt->bp->used_size; + + hp_start = hp = erts_alloc_message_heap(hsz, + &bp, + &ohp, + rp, + &rp_locks); + + if (is_immed(prt->data)) + data = prt->data; + else + data = copy_struct(prt->data, + prt->bp->used_size, + &hp, + &bp->off_heap); + + + + msg = TUPLE2(hp, am_ok, data); + hp += 3; + + queue_port_sched_op_reply(rp, + &rp_locks, + hp_start, + hp, + hsz, + bp, + sigdp->ref, + msg); + if (rp_locks) + erts_smp_proc_unlock(rp, rp_locks); + } + } + return ERTS_PORT_REDS_GET_DATA; +} + +ErtsPortOpResult +erts_port_get_data(Process* c_p, + Port *prt, + Eterm *retvalp) +{ + ErtsProc2PortSigData *sigdp; + ErtsTryImmDrvCallResult try_call_res; + ErtsTryImmDrvCallState try_call_state + = ERTS_INIT_TRY_IMM_DRV_CALL_STATE( + c_p, + prt, + ERTS_PORT_SFLGS_INVALID_LOOKUP, + 0, + 0, + am_get_data); + + try_call_res = try_imm_drv_call(&try_call_state); + switch (try_call_res) { + case ERTS_TRY_IMM_DRV_CALL_OK: { + Eterm *hp; + Eterm data; + ErlHeapFragment *bp; + Uint sz; + if (is_immed(prt->data)) { + bp = NULL; + data = prt->data; + } + else { + bp = new_message_buffer(prt->bp->used_size); + data = copy_struct(prt->data, + prt->bp->used_size, + &hp, + &bp->off_heap); + } + finalize_imm_drv_call(&try_call_state); + if (is_immed(data)) + sz = 0; + else + sz = bp->used_size; + + hp = HAlloc(c_p, sz + 3); + if (is_not_immed(data)) { + data = copy_struct(data, bp->used_size, &hp, &MSO(c_p)); + free_message_buffer(bp); + } + *retvalp = TUPLE2(hp, am_ok, data); + return ERTS_PORT_OP_DONE; + } + case ERTS_TRY_IMM_DRV_CALL_INVALID_PORT: + return ERTS_PORT_OP_DROPPED; + case ERTS_TRY_IMM_DRV_CALL_INVALID_SCHED_FLAGS: + case ERTS_TRY_IMM_DRV_CALL_BUSY_LOCK: + /* Schedule call instead... */ + break; } + + sigdp = erts_port_task_alloc_p2p_sig_data(); + sigdp->flags = ERTS_P2P_SIG_TYPE_GET_DATA; + + return erts_schedule_proc2port_signal(c_p, + prt, + c_p->common.id, + retvalp, + sigdp, + 0, + port_sig_get_data); } typedef struct { @@ -2480,39 +4681,39 @@ static void prt_one_lnk(ErtsLink *lnk, void *vprtd) } void -print_port_info(int to, void *arg, int i) +print_port_info(Port *p, int to, void *arg) { - Port* p = &erts_port[i]; + erts_aint32_t state = erts_atomic32_read_nob(&p->state); - if (p->status & ERTS_PORT_SFLGS_DEAD) + if (state & ERTS_PORT_SFLGS_DEAD) return; - erts_print(to, arg, "=port:%T\n", p->id); - erts_print(to, arg, "Slot: %d\n", i); - if (p->status & ERTS_PORT_SFLG_CONNECTED) { - erts_print(to, arg, "Connected: %T", p->connected); + erts_print(to, arg, "=port:%T\n", p->common.id); + erts_print(to, arg, "Slot: %d\n", internal_port_index(p->common.id)); + if (state & ERTS_PORT_SFLG_CONNECTED) { + erts_print(to, arg, "Connected: %T", ERTS_PORT_GET_CONNECTED(p)); erts_print(to, arg, "\n"); } - if (p->nlinks != NULL) { + if (ERTS_P_LINKS(p)) { prt_one_lnk_data prtd; prtd.to = to; prtd.arg = arg; erts_print(to, arg, "Links: "); - erts_doforall_links(p->nlinks, &prt_one_lnk, &prtd); + erts_doforall_links(ERTS_P_LINKS(p), &prt_one_lnk, &prtd); erts_print(to, arg, "\n"); } - if (p->monitors != NULL) { + if (ERTS_P_MONITORS(p)) { prt_one_lnk_data prtd; prtd.to = to; prtd.arg = arg; erts_print(to, arg, "Monitors: "); - erts_doforall_monitors(p->monitors, &prt_one_monitor, &prtd); + erts_doforall_monitors(ERTS_P_MONITORS(p), &prt_one_monitor, &prtd); erts_print(to, arg, "\n"); } - if (p->reg != NULL) - erts_print(to, arg, "Registered as: %T\n", p->reg->name); + if (p->common.u.alive.reg != NULL) + erts_print(to, arg, "Registered as: %T\n", p->common.u.alive.reg->name); if (p->drv_ptr == &fd_driver) { erts_print(to, arg, "Port is UNIX fd not opened by emulator: %s\n", p->name); @@ -2526,109 +4727,143 @@ print_port_info(int to, void *arg, int i) } void -set_busy_port(ErlDrvPort port_num, int on) +set_busy_port(ErlDrvPort dprt, int on) { + Port *prt; + erts_aint32_t flags; + #ifdef USE_VM_PROBES DTRACE_CHARBUF(port_str, 16); #endif ERTS_SMP_CHK_NO_PROC_LOCKS; - ERTS_SMP_LC_ASSERT(erts_lc_is_port_locked(&erts_port[port_num])); + prt = erts_drvport2port_raw(dprt); + if (!prt) + return; if (on) { - erts_port_status_bor_set(&erts_port[port_num], - ERTS_PORT_SFLG_PORT_BUSY); + flags = erts_smp_atomic32_read_bor_acqb(&prt->sched.flags, + ERTS_PTS_FLG_BUSY_PORT); + if (flags & ERTS_PTS_FLG_BUSY_PORT) + return; /* Already busy */ + + if (flags & ERTS_PTS_FLG_HAVE_NS_TASKS) + erts_port_task_abort_nosuspend_tasks(prt); + #ifdef USE_VM_PROBES if (DTRACE_ENABLED(port_busy)) { erts_snprintf(port_str, sizeof(port_str), - "%T", erts_port[port_num].id); + "%T", prt->common.id); DTRACE1(port_busy, port_str); } #endif } else { - ErtsProcList* plp = erts_port[port_num].suspended; - erts_port_status_band_set(&erts_port[port_num], - ~ERTS_PORT_SFLG_PORT_BUSY); - erts_port[port_num].suspended = NULL; + flags = erts_smp_atomic32_read_band_acqb(&prt->sched.flags, + ~ERTS_PTS_FLG_BUSY_PORT); + if (!(flags & ERTS_PTS_FLG_BUSY_PORT)) + return; /* Already non-busy */ #ifdef USE_VM_PROBES if (DTRACE_ENABLED(port_not_busy)) { erts_snprintf(port_str, sizeof(port_str), - "%T", erts_port[port_num].id); + "%T", prt->common.id); DTRACE1(port_not_busy, port_str); } #endif - if (erts_port[port_num].dist_entry) { + if (prt->dist_entry) { /* * Processes suspended on distribution ports are * normally queued on the dist entry. */ - erts_dist_port_not_busy(&erts_port[port_num]); + erts_dist_port_not_busy(prt); } - /* - * Resume, in a round-robin fashion, all processes waiting on the port. - * - * This version submitted by Tony Rogvall. The earlier version used - * to resume the processes in order, which caused starvation of all but - * the first process. - */ + if (!(flags & ERTS_PTS_FLG_BUSY_PORT_Q)) + erts_port_resume_procs(prt); + } +} + +void +erts_port_resume_procs(Port *prt) +{ + /* + * Resume, in a round-robin fashion, all processes waiting on the port. + * + * This version submitted by Tony Rogvall. The earlier version used + * to resume the processes in order, which caused starvation of all but + * the first process. + */ + ErtsProcList *plp; + + erts_port_task_sched_lock(&prt->sched); + plp = prt->suspended; + prt->suspended = NULL; + erts_port_task_sched_unlock(&prt->sched); + + if (erts_proclist_fetch(&plp, NULL)) { - if (plp) { #ifdef USE_VM_PROBES - /* - * Hrm, for blocked dist ports, plp always seems to be NULL. - * That's not so fun. - * Well, another way to get the same info is using a D - * script to correlate an earlier process-port_blocked+pid - * event with a later process-scheduled event. That's - * subject to the multi-CPU races with how events are - * handled, but hey, that way works most of the time. - */ - if (DTRACE_ENABLED(process_port_unblocked)) { - DTRACE_CHARBUF(pid_str, 16); - ErtsProcList* plp2 = plp; - - erts_snprintf(port_str, sizeof(port_str), - "%T", erts_port[port_num]); - while (plp2 != NULL) { - erts_snprintf(pid_str, sizeof(pid_str), "%T", plp2->pid); - DTRACE2(process_port_unblocked, pid_str, port_str); - } - } -#endif - /* First proc should be resumed last */ - if (plp->next) { - erts_resume_processes(plp->next); - plp->next = NULL; + /* + * Hrm, for blocked dist ports, plp always seems to be NULL. + * That's not so fun. + * Well, another way to get the same info is using a D + * script to correlate an earlier process-port_blocked+pid + * event with a later process-scheduled event. That's + * subject to the multi-CPU races with how events are + * handled, but hey, that way works most of the time. + */ + if (DTRACE_ENABLED(process_port_unblocked)) { + DTRACE_CHARBUF(port_str, 16); + DTRACE_CHARBUF(pid_str, 16); + ErtsProcList* plp2 = plp; + + erts_snprintf(port_str, sizeof(port_str), "%T", prt->common.id); + while (plp2 != NULL) { + erts_snprintf(pid_str, sizeof(pid_str), "%T", plp2->pid); + DTRACE2(process_port_unblocked, pid_str, port_str); } - erts_resume_processes(plp); - } + } +#endif + + /* First proc should be resumed last */ + if (plp->next) { + plp->next->prev = NULL; + erts_resume_processes(plp->next); + plp->next = NULL; + } + erts_resume_processes(plp); } } void set_port_control_flags(ErlDrvPort port_num, int flags) { - - ERTS_SMP_LC_ASSERT(erts_lc_is_port_locked(&erts_port[port_num])); - - erts_port[port_num].control_flags = flags; + Port *prt = erts_drvport2port_raw(port_num); + if (prt) + prt->control_flags = flags; } -int get_port_flags(ErlDrvPort ix) { - Port* prt = erts_drvport2port(ix); +int get_port_flags(ErlDrvPort ix) +{ + int flags; + Port *prt; + erts_aint32_t state; + + prt = erts_drvport2port(ix, &state); + if (!prt) + return 0; ERTS_SMP_LC_ASSERT(erts_lc_is_port_locked(prt)); - if (prt == NULL) - return 0; + flags = 0; + if (state & ERTS_PORT_SFLG_BINARY_IO) + flags |= PORT_FLAG_BINARY; + if (state & ERTS_PORT_SFLG_LINEBUF_IO) + flags |= PORT_FLAG_LINE; - return (prt->status & ERTS_PORT_SFLG_BINARY_IO ? PORT_FLAG_BINARY : 0) - | (prt->status & ERTS_PORT_SFLG_LINEBUF_IO ? PORT_FLAG_LINE : 0); + return flags; } - void erts_raw_port_command(Port* p, byte* buf, Uint len) { int fpe_was_unmasked; @@ -2665,25 +4900,18 @@ int async_ready(Port *p, void* data) if (p) { ERTS_SMP_LC_ASSERT(erts_lc_is_port_locked(p)); - ASSERT(!(p->status & ERTS_PORT_SFLGS_DEAD)); if (p->drv_ptr->ready_async != NULL) { #ifdef USE_VM_PROBES if (DTRACE_ENABLED(driver_ready_async)) { - DTRACE_FORMAT_COMMON_PID_AND_PORT(p->connected, p) + DTRACE_FORMAT_COMMON_PID_AND_PORT(ERTS_PORT_GET_CONNECTED(p), p) DTRACE3(driver_ready_async, process_str, port_str, p->name); } #endif (*p->drv_ptr->ready_async)((ErlDrvData)p->drv_data, data); need_free = 0; -#ifdef ERTS_SMP - if (p->xports) - erts_smp_xports_unlock(p); - ASSERT(!p->xports); -#endif - } - if ((p->status & ERTS_PORT_SFLG_CLOSING) && is_port_ioq_empty(p)) { - terminate_port(p); + } + erts_port_driver_callback_epilogue(p, NULL); } return need_free; } @@ -2691,12 +4919,12 @@ int async_ready(Port *p, void* data) static void report_missing_drv_callback(Port *p, char *drv_type, char *callback) { - ErtsPortNames *pnp = erts_get_port_names(p->id); + ErtsPortNames *pnp = erts_get_port_names(p->common.id); char *unknown = "<unknown>"; char *drv_name = pnp->driver_name ? pnp->driver_name : unknown; char *prt_name = pnp->name ? pnp->name : unknown; erts_dsprintf_buf_t *dsbufp = erts_create_logger_dsbuf(); - erts_dsprintf(dsbufp, "%T: %s driver '%s' ", p->id, drv_type, drv_name); + erts_dsprintf(dsbufp, "%T: %s driver '%s' ", p->common.id, drv_type, drv_name); if (sys_strcmp(drv_name, prt_name) != 0) erts_dsprintf(dsbufp, "(%s) ", prt_name); erts_dsprintf(dsbufp, "does not implement the %s callback!\n", callback); @@ -2711,7 +4939,7 @@ erts_stale_drv_select(Eterm port, int deselect) { char *type; - ErlDrvPort drv_port = internal_port_index(port); + ErlDrvPort drv_port = (ErlDrvPort) erts_port_lookup_raw(port); ErtsPortNames *pnp = erts_get_port_names(port); erts_dsprintf_buf_t *dsbufp; @@ -2751,16 +4979,16 @@ erts_stale_drv_select(Eterm port, ErtsPortNames * erts_get_port_names(Eterm id) { + Port *prt = erts_port_lookup_raw(id); ErtsPortNames *pnp; ASSERT(is_nil(id) || is_internal_port(id)); - - if (is_not_internal_port(id)) { + + if (!prt) { pnp = erts_alloc(ERTS_ALC_T_PORT_NAMES, sizeof(ErtsPortNames)); pnp->name = NULL; pnp->driver_name = NULL; } else { - Port* prt = &erts_port[internal_port_index(id)]; int do_realloc = 1; int len = -1; size_t pnp_len = sizeof(ErtsPortNames); @@ -2776,17 +5004,10 @@ erts_get_port_names(Eterm id) pnp_len = sizeof(ErtsPortNames) + len; pnp = erts_alloc(ERTS_ALC_T_PORT_NAMES, pnp_len); } - erts_smp_port_state_lock(prt); - if (id != prt->id) { - len = nlen = 0; - name = driver_name = NULL; - } - else { - name = prt->name; - len = nlen = name ? sys_strlen(name) + 1 : 0; - driver_name = (prt->drv_ptr ? prt->drv_ptr->name : NULL); - len += driver_name ? sys_strlen(driver_name) + 1 : 0; - } + name = prt->name; + len = nlen = name ? sys_strlen(name) + 1 : 0; + driver_name = (prt->drv_ptr ? prt->drv_ptr->name : NULL); + len += driver_name ? sys_strlen(driver_name) + 1 : 0; if (len <= pnp_len - sizeof(ErtsPortNames)) { if (!name) pnp->name = NULL; @@ -2804,7 +5025,6 @@ erts_get_port_names(Eterm id) } do_realloc = 0; } - erts_smp_port_state_unlock(prt); } while (do_realloc); } return pnp; @@ -2829,11 +5049,9 @@ static void schedule_port_timeout(Port *p) * /Rickard */ ERTS_SMP_LC_ASSERT(erts_lc_is_port_locked(p)); - (void) erts_port_task_schedule(p->id, - &p->timeout_task, - ERTS_PORT_TASK_TIMEOUT, - (ErlDrvEvent) -1, - NULL); + erts_port_task_schedule(p->common.id, + &p->timeout_task, + ERTS_PORT_TASK_TIMEOUT); } ErlDrvTermData driver_mk_term_nil(void) @@ -2841,9 +5059,9 @@ ErlDrvTermData driver_mk_term_nil(void) return driver_term_nil; } -void driver_report_exit(int ix, int status) +void driver_report_exit(ErlDrvPort ix, int status) { - Port* prt = erts_drvport2port(ix); + Port* prt = erts_drvport2port(ix, NULL); Eterm* hp; Eterm tuple; Process *rp; @@ -2856,7 +5074,7 @@ void driver_report_exit(int ix, int status) ERTS_SMP_CHK_NO_PROC_LOCKS; ERTS_SMP_LC_ASSERT(erts_lc_is_port_locked(prt)); - pid = prt->connected; + pid = ERTS_PORT_GET_CONNECTED(prt); ASSERT(is_internal_pid(pid)); rp = (scheduler @@ -2869,7 +5087,7 @@ void driver_report_exit(int ix, int status) tuple = TUPLE2(hp, am_exit_status, make_small(status)); hp += 3; - tuple = TUPLE2(hp, prt->id, tuple); + tuple = TUPLE2(hp, prt->common.id, tuple); erts_queue_message(rp, &rp_locks, bp, tuple, am_undefined #ifdef USE_VM_PROBES @@ -2882,28 +5100,6 @@ void driver_report_exit(int ix, int status) erts_smp_proc_dec_refc(rp); } - -static ERTS_INLINE int -deliver_term_check_port(ErlDrvPort drvport) -{ - int res; - int ix = (int) drvport; - if (ix < 0 || erts_max_ports <= ix) - res = -1; /* invalid */ - else { - Port* prt = &erts_port[ix]; - erts_smp_port_state_lock(prt); - if (!(prt->status & ERTS_PORT_SFLGS_INVALID_LOOKUP)) - res = 1; /* ok */ - else if (prt->status & ERTS_PORT_SFLG_CLOSING) - res = 0; /* closing */ - else - res = -1; /* invalid (dead) */ - erts_smp_port_state_unlock(prt); - } - return res; -} - #define ERTS_B2T_STATES_DEF_STATES_SZ 5 #define ERTS_B2T_STATES_DEF_STATES_INC 100 @@ -2991,10 +5187,7 @@ cleanup_b2t_states(struct b2t_states__ *b2tsp) */ static int -driver_deliver_term(ErlDrvPort port, - Eterm to, - ErlDrvTermData* data, - int len) +driver_deliver_term(Eterm to, ErlDrvTermData* data, int len) { #define ERTS_DDT_FAIL do { res = -1; goto done; } while (0) Uint need = 0; @@ -3196,11 +5389,8 @@ driver_deliver_term(ErlDrvPort port, b2t.ix = 0; /* - * The term is OK. Go ahead and validate the port and process. + * The term is OK. Go ahead and validate the process. */ - res = deliver_term_check_port(port); - if (res <= 0) - goto done; /* * Increase refc on proc if done from a non-scheduler thread. @@ -3470,25 +5660,115 @@ driver_deliver_term(ErlDrvPort port, #undef ERTS_DDT_FAIL } +static ERTS_INLINE int +deliver_term_check_port(ErlDrvTermData port_id, Eterm *connected_p) +{ +#ifdef ERTS_SMP + ErtsThrPrgrDelayHandle dhndl = erts_thr_progress_unmanaged_delay(); +#endif + Port *prt = erts_port_lookup_raw((Eterm) port_id); + erts_aint32_t state = erts_atomic32_read_nob(&prt->state); + if (connected_p) { +#ifdef ERTS_SMP + if (dhndl != ERTS_THR_PRGR_DHANDLE_MANAGED) + ETHR_MEMBAR(ETHR_LoadLoad); +#endif + *connected_p = ERTS_PORT_GET_CONNECTED(prt); + } +#ifdef ERTS_SMP + if (dhndl != ERTS_THR_PRGR_DHANDLE_MANAGED) { + erts_thr_progress_unmanaged_continue(dhndl); + ETHR_MEMBAR(ETHR_LoadLoad|ETHR_LoadStore); + } +#endif + ERTS_SMP_LC_ASSERT(dhndl == ERTS_THR_PRGR_DHANDLE_MANAGED + ? erts_lc_is_port_locked(prt) + : !erts_lc_is_port_locked(prt)); + return ((state & ERTS_PORT_SFLGS_INVALID_DRIVER_LOOKUP) + ? -1 + : ((state & ERTS_PORT_SFLG_CLOSING) ? 0 : 1)); +} + +int erl_drv_output_term(ErlDrvTermData port_id, ErlDrvTermData* data, int len) +{ + /* May be called from arbitrary thread */ + Eterm connected; + int res = deliver_term_check_port(port_id, &connected); + if (res <= 0) + return res; + return driver_deliver_term(connected, data, len); +} +/* + * driver_output_term() is deprecated, and has been scheduled for + * removal in OTP-R17. It is replaced by erl_drv_output_term() + * above. + */ int -driver_output_term(ErlDrvPort ix, ErlDrvTermData* data, int len) +driver_output_term(ErlDrvPort drvport, ErlDrvTermData* data, int len) { - Port* prt = erts_drvport2port(ix); + erts_aint32_t state; + Port* prt; ERTS_SMP_CHK_NO_PROC_LOCKS; + /* NOTE! It *not* safe to access 'drvport' from unmanaged threads. */ + prt = erts_drvport2port(drvport, &state); + if (!prt) + return -1; /* invalid (dead) */ + ERTS_SMP_CHK_NO_PROC_LOCKS; ERTS_SMP_LC_ASSERT(erts_lc_is_port_locked(prt)); - - if (prt == NULL) + if (state & ERTS_PORT_SFLGS_INVALID_DRIVER_LOOKUP) return -1; - return driver_deliver_term(ix, prt->connected, data, len); + else if (state & ERTS_PORT_SFLG_CLOSING) + return 0; + + return driver_deliver_term(ERTS_PORT_GET_CONNECTED(prt), data, len); } +int erl_drv_send_term(ErlDrvTermData port_id, + ErlDrvTermData to, + ErlDrvTermData* data, + int len) +{ + /* May be called from arbitrary thread */ + int res = deliver_term_check_port(port_id, NULL); + if (res <= 0) + return res; + return driver_deliver_term(to, data, len); +} +/* + * driver_send_term() is deprecated, and has been scheduled for + * removal in OTP-R17. It is replaced by erl_drv_send_term() above. + */ int -driver_send_term(ErlDrvPort ix, ErlDrvTermData to, ErlDrvTermData* data, int len) +driver_send_term(ErlDrvPort drvport, + ErlDrvTermData to, + ErlDrvTermData* data, + int len) { - return driver_deliver_term(ix, to, data, len); + /* + * NOTE! It is *not* safe to access the 'drvport' parameter + * from unmanaged threads. Also note that it is impossible + * to make this access safe without using a less efficient + * internal data representation for ErlDrvPort. + */ + ERTS_SMP_CHK_NO_PROC_LOCKS; +#ifdef ERTS_SMP + if (erts_thr_progress_is_managed_thread()) +#endif + { + erts_aint32_t state; + Port* prt = erts_drvport2port(drvport, &state); + if (!prt) + return -1; /* invalid (dead) */ + ERTS_SMP_LC_ASSERT(erts_lc_is_port_locked(prt)); + if (state & ERTS_PORT_SFLGS_INVALID_DRIVER_LOOKUP) + return -1; + else if (state & ERTS_PORT_SFLG_CLOSING) + return 0; + } + return driver_deliver_term(to, data, len); } @@ -3500,26 +5780,27 @@ driver_send_term(ErlDrvPort ix, ErlDrvTermData to, ErlDrvTermData* data, int len int driver_output_binary(ErlDrvPort ix, char* hbuf, ErlDrvSizeT hlen, ErlDrvBinary* bin, ErlDrvSizeT offs, ErlDrvSizeT len) { - Port* prt = erts_drvport2port(ix); + erts_aint32_t state; + Port* prt = erts_drvport2port(ix, &state); ERTS_SMP_CHK_NO_PROC_LOCKS; if (prt == NULL) return -1; ERTS_SMP_LC_ASSERT(erts_lc_is_port_locked(prt)); - if (prt->status & ERTS_PORT_SFLG_CLOSING) + if (state & ERTS_PORT_SFLG_CLOSING) return 0; prt->bytes_in += (hlen + len); erts_smp_atomic_add_nob(&erts_bytes_in, (erts_aint_t) (hlen + len)); - if (prt->status & ERTS_PORT_SFLG_DISTRIBUTION) { + if (state & ERTS_PORT_SFLG_DISTRIBUTION) { return erts_net_message(prt, prt->dist_entry, (byte*) hbuf, hlen, (byte*) (bin->orig_bytes+offs), len); } else - deliver_bin_message(prt, prt->connected, + deliver_bin_message(prt, ERTS_PORT_GET_CONNECTED(prt), hbuf, hlen, bin, offs, len); return 0; } @@ -3534,7 +5815,8 @@ int driver_output_binary(ErlDrvPort ix, char* hbuf, ErlDrvSizeT hlen, int driver_output2(ErlDrvPort ix, char* hbuf, ErlDrvSizeT hlen, char* buf, ErlDrvSizeT len) { - Port* prt = erts_drvport2port(ix); + erts_aint32_t state; + Port* prt = erts_drvport2port(ix, &state); ERTS_SMP_CHK_NO_PROC_LOCKS; @@ -3543,12 +5825,12 @@ int driver_output2(ErlDrvPort ix, char* hbuf, ErlDrvSizeT hlen, ERTS_SMP_LC_ASSERT(erts_lc_is_port_locked(prt)); - if (prt->status & ERTS_PORT_SFLG_CLOSING) + if (state & ERTS_PORT_SFLG_CLOSING) return 0; prt->bytes_in += (hlen + len); erts_smp_atomic_add_nob(&erts_bytes_in, (erts_aint_t) (hlen + len)); - if (prt->status & ERTS_PORT_SFLG_DISTRIBUTION) { + if (state & ERTS_PORT_SFLG_DISTRIBUTION) { if (len == 0) return erts_net_message(prt, prt->dist_entry, @@ -3560,10 +5842,12 @@ int driver_output2(ErlDrvPort ix, char* hbuf, ErlDrvSizeT hlen, (byte*) hbuf, hlen, (byte*) buf, len); } - else if(prt->status & ERTS_PORT_SFLG_LINEBUF_IO) - deliver_linebuf_message(prt, prt->connected, hbuf, hlen, buf, len); + else if (state & ERTS_PORT_SFLG_LINEBUF_IO) + deliver_linebuf_message(prt, state, ERTS_PORT_GET_CONNECTED(prt), + hbuf, hlen, buf, len); else - deliver_read_message(prt, prt->connected, hbuf, hlen, buf, len, 0); + deliver_read_message(prt, state, ERTS_PORT_GET_CONNECTED(prt), + hbuf, hlen, buf, len, 0); return 0; } @@ -3584,6 +5868,7 @@ int driver_outputv(ErlDrvPort ix, char* hbuf, ErlDrvSizeT hlen, SysIOVec* iov; ErlDrvBinary** binv; Port* prt; + erts_aint32_t state; ERTS_SMP_CHK_NO_PROC_LOCKS; @@ -3596,13 +5881,13 @@ int driver_outputv(ErlDrvPort ix, char* hbuf, ErlDrvSizeT hlen, if (hlen < 0) hlen = 0; - prt = erts_drvport2port(ix); + prt = erts_drvport2port(ix, &state); if (prt == NULL) return -1; ERTS_SMP_LC_ASSERT(erts_lc_is_port_locked(prt)); - if (prt->status & ERTS_PORT_SFLG_CLOSING) + if (state & ERTS_PORT_SFLG_CLOSING) return 0; /* size > 0 ! */ @@ -3627,7 +5912,8 @@ int driver_outputv(ErlDrvPort ix, char* hbuf, ErlDrvSizeT hlen, /* XXX handle distribution !!! */ prt->bytes_in += (hlen + size); erts_smp_atomic_add_nob(&erts_bytes_in, (erts_aint_t) (hlen + size)); - deliver_vec_message(prt, prt->connected, hbuf, hlen, binv, iov, n, size); + deliver_vec_message(prt, ERTS_PORT_GET_CONNECTED(prt), hbuf, hlen, + binv, iov, n, size); return 0; } @@ -3738,8 +6024,7 @@ ErlDrvBinary* driver_realloc_binary(ErlDrvBinary* bin, ErlDrvSizeT size) } -void driver_free_binary(dbin) -ErlDrvBinary* dbin; +void driver_free_binary(ErlDrvBinary* dbin) { Binary *bin; if (!dbin) { @@ -3835,6 +6120,7 @@ static ERTS_INLINE void pdl_destroy(ErlDrvPDL pdl) { ERTS_LC_ASSERT(driver_pdl_get_refc(pdl) == 0); erts_mtx_destroy(&pdl->mtx); + erts_port_dec_refc(pdl->prt); erts_free(ERTS_ALC_T_PORT_DATA_LOCK, pdl); } @@ -3872,16 +6158,18 @@ ErlDrvPDL driver_pdl_create(ErlDrvPort dp) { ErlDrvPDL pdl; - Port *pp = erts_drvport2port(dp); + Port *pp = erts_drvport2port(dp, NULL); if (!pp || pp->port_data_lock) return NULL; pdl = erts_alloc(ERTS_ALC_T_PORT_DATA_LOCK, sizeof(struct erl_drv_port_data_lock)); erts_mtx_init(&pdl->mtx, "port_data_lock"); pdl_init_refc(pdl); + erts_port_inc_refc(pp); + pdl->prt = pp; pp->port_data_lock = pdl; #ifdef HARDDEBUG - erts_fprintf(stderr, "driver_pdl_create(%T) -> 0x%08X\r\n",pp->id,(unsigned) pdl); + erts_fprintf(stderr, "driver_pdl_create(%T) -> 0x%08X\r\n",pp->common.id,(unsigned) pdl); #endif return pdl; } @@ -4319,33 +6607,33 @@ static ERTS_INLINE void drv_cancel_timer(Port *prt) { #ifdef ERTS_SMP - erts_cancel_smp_ptimer(prt->ptimer); + erts_cancel_smp_ptimer(prt->common.u.alive.ptimer); #else - erts_cancel_timer(&prt->tm); + erts_cancel_timer(&prt->common.u.alive.tm); #endif if (erts_port_task_is_scheduled(&prt->timeout_task)) - erts_port_task_abort(prt->id, &prt->timeout_task); + erts_port_task_abort(&prt->timeout_task); } int driver_set_timer(ErlDrvPort ix, unsigned long t) { - Port* prt = erts_drvport2port(ix); + Port* prt = erts_drvport2port(ix, NULL); ERTS_SMP_CHK_NO_PROC_LOCKS; if (prt == NULL) return -1; - ERTS_SMP_LC_ASSERT(erts_lc_is_port_locked(prt)); + if (prt->drv_ptr->timeout == NULL) return -1; drv_cancel_timer(prt); #ifdef ERTS_SMP - erts_create_smp_ptimer(&prt->ptimer, - prt->id, + erts_create_smp_ptimer(&prt->common.u.alive.ptimer, + prt->common.id, (ErlTimeoutProc) schedule_port_timeout, t); #else - erts_set_timer(&prt->tm, + erts_set_timer(&prt->common.u.alive.tm, (ErlTimeoutProc) schedule_port_timeout, NULL, prt, @@ -4356,7 +6644,7 @@ int driver_set_timer(ErlDrvPort ix, unsigned long t) int driver_cancel_timer(ErlDrvPort ix) { - Port* prt = erts_drvport2port(ix); + Port* prt = erts_drvport2port(ix, NULL); if (prt == NULL) return -1; ERTS_SMP_LC_ASSERT(erts_lc_is_port_locked(prt)); @@ -4368,7 +6656,7 @@ int driver_cancel_timer(ErlDrvPort ix) int driver_read_timer(ErlDrvPort ix, unsigned long* t) { - Port* prt = erts_drvport2port(ix); + Port* prt = erts_drvport2port(ix, NULL); ERTS_SMP_CHK_NO_PROC_LOCKS; @@ -4376,9 +6664,11 @@ driver_read_timer(ErlDrvPort ix, unsigned long* t) return -1; ERTS_SMP_LC_ASSERT(erts_lc_is_port_locked(prt)); #ifdef ERTS_SMP - *t = prt->ptimer ? erts_time_left(&prt->ptimer->timer.tm) : 0; + *t = (prt->common.u.alive.ptimer + ? erts_time_left(&prt->common.u.alive.ptimer->timer.tm) + : 0); #else - *t = erts_time_left(&prt->tm); + *t = erts_time_left(&prt->common.u.alive.tm); #endif return 0; } @@ -4429,8 +6719,8 @@ static int do_driver_monitor_process(Port *prt, } ref = erts_make_ref_in_buffer(buf); - erts_add_monitor(&(prt->monitors), MON_ORIGIN, ref, rp->id, NIL); - erts_add_monitor(&(rp->monitors), MON_TARGET, ref, prt->id, NIL); + erts_add_monitor(&ERTS_P_MONITORS(prt), MON_ORIGIN, ref, rp->common.id, NIL); + erts_add_monitor(&ERTS_P_MONITORS(rp), MON_TARGET, ref, prt->common.id, NIL); erts_smp_proc_unlock(rp, ERTS_PROC_LOCK_LINK); ref_to_driver_monitor(ref,monitor); @@ -4440,31 +6730,22 @@ static int do_driver_monitor_process(Port *prt, /* * This can be called from a non scheduler thread iff a port_data_lock exists */ -int driver_monitor_process(ErlDrvPort port, +int driver_monitor_process(ErlDrvPort drvport, ErlDrvTermData process, ErlDrvMonitor *monitor) { Port *prt; int ret; - Uint32 status; + erts_aint32_t state; +#if !HEAP_ON_C_STACK || (defined(ERTS_SMP) && defined(ERTS_ENABLE_LOCK_CHECK)) ErtsSchedulerData *sched = erts_get_scheduler_data(); - int ix = (int) port; - if (ix < 0 || erts_max_ports <= ix) { - return -1; - } - prt = &erts_port[ix]; +#endif - DRV_MONITOR_LOCK_PDL(prt); + prt = DRV_MONITOR_LOOKUP_PORT_LOCK_PDL(drvport); - if (sched) { - status = erts_port[ix].status; - } else { - erts_smp_port_state_lock(prt); - status = erts_port[ix].status; - erts_smp_port_state_unlock(prt); - } + state = erts_atomic32_read_nob(&prt->state); - if (status & ERTS_PORT_SFLGS_INVALID_DRIVER_LOOKUP) { + if (state & ERTS_PORT_SFLGS_INVALID_DRIVER_LOOKUP) { DRV_MONITOR_UNLOCK_PDL(prt); return -1; } @@ -4502,7 +6783,7 @@ static int do_driver_demonitor_process(Port *prt, Eterm *buf, memcpy(buf,monitor,sizeof(Eterm)*REF_THING_SIZE); ref = make_internal_ref(buf); - mon = erts_lookup_monitor(prt->monitors, ref); + mon = erts_lookup_monitor(ERTS_P_MONITORS(prt), ref); if (mon == NULL) { return 1; } @@ -4514,13 +6795,13 @@ static int do_driver_demonitor_process(Port *prt, Eterm *buf, to, ERTS_PROC_LOCK_LINK, ERTS_P2P_FLG_ALLOW_OTHER_X); - mon = erts_remove_monitor(&(prt->monitors), ref); + mon = erts_remove_monitor(&ERTS_P_MONITORS(prt), ref); if (mon) { erts_destroy_monitor(mon); } if (rp) { ErtsMonitor *rmon; - rmon = erts_remove_monitor(&(rp->monitors), ref); + rmon = erts_remove_monitor(&ERTS_P_MONITORS(rp), ref); erts_smp_proc_unlock(rp, ERTS_PROC_LOCK_LINK); if (rmon != NULL) { erts_destroy_monitor(rmon); @@ -4529,30 +6810,21 @@ static int do_driver_demonitor_process(Port *prt, Eterm *buf, return 0; } -int driver_demonitor_process(ErlDrvPort port, +int driver_demonitor_process(ErlDrvPort drvport, const ErlDrvMonitor *monitor) { Port *prt; int ret; - Uint32 status; + erts_aint32_t state; +#if !HEAP_ON_C_STACK || (defined(ERTS_SMP) && defined(ERTS_ENABLE_LOCK_CHECK)) ErtsSchedulerData *sched = erts_get_scheduler_data(); - int ix = (int) port; - if (ix < 0 || erts_max_ports <= ix) { - return -1; - } - prt = &erts_port[ix]; +#endif - DRV_MONITOR_LOCK_PDL(prt); + prt = DRV_MONITOR_LOOKUP_PORT_LOCK_PDL(drvport); - if (sched) { - status = erts_port[ix].status; - } else { - erts_smp_port_state_lock(prt); - status = erts_port[ix].status; - erts_smp_port_state_unlock(prt); - } + state = erts_atomic32_read_nob(&prt->state); - if (status & ERTS_PORT_SFLGS_INVALID_DRIVER_LOOKUP) { + if (state & ERTS_PORT_SFLGS_INVALID_DRIVER_LOOKUP) { DRV_MONITOR_UNLOCK_PDL(prt); return -1; } @@ -4588,7 +6860,7 @@ static ErlDrvTermData do_driver_get_monitored_process(Port *prt, Eterm *buf, memcpy(buf,monitor,sizeof(Eterm)*REF_THING_SIZE); ref = make_internal_ref(buf); - mon = erts_lookup_monitor(prt->monitors, ref); + mon = erts_lookup_monitor(ERTS_P_MONITORS(prt), ref); if (mon == NULL) { return driver_term_nil; } @@ -4599,30 +6871,20 @@ static ErlDrvTermData do_driver_get_monitored_process(Port *prt, Eterm *buf, } -ErlDrvTermData driver_get_monitored_process(ErlDrvPort port, +ErlDrvTermData driver_get_monitored_process(ErlDrvPort drvport, const ErlDrvMonitor *monitor) { Port *prt; ErlDrvTermData ret; - Uint32 status; + erts_aint32_t state; +#if !HEAP_ON_C_STACK || (defined(ERTS_SMP) && defined(ERTS_ENABLE_LOCK_CHECK)) ErtsSchedulerData *sched = erts_get_scheduler_data(); - int ix = (int) port; - if (ix < 0 || erts_max_ports <= ix) { - return driver_term_nil; - } - prt = &erts_port[ix]; - - DRV_MONITOR_LOCK_PDL(prt); +#endif - if (sched) { - status = erts_port[ix].status; - } else { - erts_smp_port_state_lock(prt); - status = erts_port[ix].status; - erts_smp_port_state_unlock(prt); - } + prt = DRV_MONITOR_LOOKUP_PORT_LOCK_PDL(drvport); - if (status & ERTS_PORT_SFLGS_INVALID_DRIVER_LOOKUP) { + state = erts_atomic32_read_nob(&prt->state); + if (state & ERTS_PORT_SFLGS_INVALID_DRIVER_LOOKUP) { DRV_MONITOR_UNLOCK_PDL(prt); return driver_term_nil; } @@ -4667,7 +6929,7 @@ void erts_fire_port_monitor(Port *prt, Eterm ref) ERTS_SMP_LC_ASSERT(erts_lc_is_port_locked(prt)); ASSERT(prt->drv_ptr != NULL); DRV_MONITOR_LOCK_PDL(prt); - if (erts_lookup_monitor(prt->monitors,ref) == NULL) { + if (erts_lookup_monitor(ERTS_P_MONITORS(prt), ref) == NULL) { DRV_MONITOR_UNLOCK_PDL(prt); return; } @@ -4677,7 +6939,7 @@ void erts_fire_port_monitor(Port *prt, Eterm ref) DRV_MONITOR_UNLOCK_PDL(prt); #ifdef USE_VM_PROBES if (DTRACE_ENABLED(driver_process_exit)) { - DTRACE_FORMAT_COMMON_PID_AND_PORT(prt->connected, prt) + DTRACE_FORMAT_COMMON_PID_AND_PORT(ERTS_PORT_GET_CONNECTED(prt), prt) DTRACE3(driver_process_exit, process_str, port_str, prt->name); } #endif @@ -4686,7 +6948,7 @@ void erts_fire_port_monitor(Port *prt, Eterm ref) erts_unblock_fpe(fpe_was_unmasked); DRV_MONITOR_LOCK_PDL(prt); /* remove monitor *after* callback */ - rmon = erts_remove_monitor(&(prt->monitors),ref); + rmon = erts_remove_monitor(&ERTS_P_MONITORS(prt), ref); DRV_MONITOR_UNLOCK_PDL(prt); if (rmon) { erts_destroy_monitor(rmon); @@ -4697,7 +6959,8 @@ void erts_fire_port_monitor(Port *prt, Eterm ref) static int driver_failure_term(ErlDrvPort ix, Eterm term, int eof) { - Port* prt = erts_drvport2port(ix); + erts_aint32_t state; + Port* prt = erts_drvport2port(ix, &state); ERTS_SMP_CHK_NO_PROC_LOCKS; @@ -4705,19 +6968,19 @@ driver_failure_term(ErlDrvPort ix, Eterm term, int eof) return -1; ERTS_SMP_LC_ASSERT(erts_lc_is_port_locked(prt)); if (eof) - flush_linebuf_messages(prt); - if (prt->status & ERTS_PORT_SFLG_CLOSING) { + flush_linebuf_messages(prt, state); + if (state & ERTS_PORT_SFLG_CLOSING) { terminate_port(prt); - } else if (eof && (prt->status & ERTS_PORT_SFLG_SOFT_EOF)) { - deliver_result(prt->id, prt->connected, am_eof); + } else if (eof && (state & ERTS_PORT_SFLG_SOFT_EOF)) { + deliver_result(prt->common.id, ERTS_PORT_GET_CONNECTED(prt), am_eof); } else { - /* XXX UGLY WORK AROUND, Let do_exit_port terminate the port */ + /* XXX UGLY WORK AROUND, Let erts_deliver_port_exit() terminate the port */ if (prt->port_data_lock) driver_pdl_lock(prt->port_data_lock); prt->ioq.size = 0; if (prt->port_data_lock) driver_pdl_unlock(prt->port_data_lock); - erts_do_exit_port(prt, prt->id, eof ? am_normal : term); + erts_deliver_port_exit(prt, prt->common.id, eof ? am_normal : term, 0); } return 0; } @@ -4730,23 +6993,23 @@ driver_failure_term(ErlDrvPort ix, Eterm term, int eof) */ int driver_exit(ErlDrvPort ix, int err) { - Port* prt = erts_drvport2port(ix); + Port* prt = erts_drvport2port(ix, NULL); Process* rp; ErtsLink *lnk, *rlnk = NULL; + Eterm connected; ERTS_SMP_CHK_NO_PROC_LOCKS; if (prt == NULL) return -1; - ERTS_SMP_LC_ASSERT(erts_lc_is_port_locked(prt)); - - rp = erts_pid2proc(NULL, 0, prt->connected, ERTS_PROC_LOCK_LINK); + connected = ERTS_PORT_GET_CONNECTED(prt); + rp = erts_pid2proc(NULL, 0, connected, ERTS_PROC_LOCK_LINK); if (rp) { - rlnk = erts_remove_link(&(rp->nlinks),prt->id); + rlnk = erts_remove_link(&ERTS_P_LINKS(rp),prt->common.id); } - lnk = erts_remove_link(&(prt->nlinks),prt->connected); + lnk = erts_remove_link(&ERTS_P_LINKS(prt), connected); #ifdef ERTS_SMP if (rp) @@ -4803,24 +7066,24 @@ ErlDrvTermData driver_mk_atom(char* string) ErlDrvTermData driver_mk_port(ErlDrvPort ix) { - Port* prt = erts_drvport2port(ix); + Port* prt = erts_drvport2port(ix, NULL); ERTS_SMP_LC_ASSERT(erts_lc_is_port_locked(prt)); - return (ErlDrvTermData) prt->id; + return (ErlDrvTermData) prt->common.id; } ErlDrvTermData driver_connected(ErlDrvPort ix) { - Port* prt = erts_drvport2port(ix); + Port* prt = erts_drvport2port(ix, NULL); ERTS_SMP_CHK_NO_PROC_LOCKS; if (prt == NULL) return NIL; ERTS_SMP_LC_ASSERT(erts_lc_is_port_locked(prt)); - return prt->connected; + return ERTS_PORT_GET_CONNECTED(prt); } ErlDrvTermData driver_caller(ErlDrvPort ix) { - Port* prt = erts_drvport2port(ix); + Port* prt = erts_drvport2port(ix, NULL); ERTS_SMP_CHK_NO_PROC_LOCKS; if (prt == NULL) return NIL; @@ -4830,25 +7093,25 @@ ErlDrvTermData driver_caller(ErlDrvPort ix) int driver_lock_driver(ErlDrvPort ix) { - Port* prt = erts_drvport2port(ix); + Port* prt = erts_drvport2port(ix, NULL); DE_Handle* dh; ERTS_SMP_CHK_NO_PROC_LOCKS; - erts_smp_mtx_lock(&erts_driver_list_lock); + erts_smp_rwmtx_rwlock(&erts_driver_list_lock); if (prt == NULL) { - erts_smp_mtx_unlock(&erts_driver_list_lock); + erts_smp_rwmtx_rwunlock(&erts_driver_list_lock); return -1; } ERTS_SMP_LC_ASSERT(erts_lc_is_port_locked(prt)); if ((dh = (DE_Handle*)prt->drv_ptr->handle ) == NULL) { - erts_smp_mtx_unlock(&erts_driver_list_lock); + erts_smp_rwmtx_rwunlock(&erts_driver_list_lock); return -1; } erts_ddll_lock_driver(dh, prt->drv_ptr->name); - erts_smp_mtx_unlock(&erts_driver_list_lock); + erts_smp_rwmtx_rwunlock(&erts_driver_list_lock); return 0; } @@ -4858,7 +7121,7 @@ static int maybe_lock_driver_list(void) void *rec_lock; rec_lock = erts_smp_tsd_get(driver_list_lock_status_key); if (rec_lock == 0) { - erts_smp_mtx_lock(&erts_driver_list_lock); + erts_smp_rwmtx_rwlock(&erts_driver_list_lock); return 1; } return 0; @@ -4866,7 +7129,7 @@ static int maybe_lock_driver_list(void) static void maybe_unlock_driver_list(int doit) { if (doit) { - erts_smp_mtx_unlock(&erts_driver_list_lock); + erts_smp_rwmtx_rwunlock(&erts_driver_list_lock); } } /* @@ -5035,7 +7298,7 @@ no_event_callback(ErlDrvData drv_data, ErlDrvEvent event, ErlDrvEventData event_ { Port *prt = get_current_port(); report_missing_drv_callback(prt, "Event", "event()"); - driver_event((ErlDrvPort) internal_port_index(prt->id), event, NULL); + driver_event((ErlDrvPort) prt, event, NULL); } static void @@ -5043,7 +7306,7 @@ no_ready_input_callback(ErlDrvData drv_data, ErlDrvEvent event) { Port *prt = get_current_port(); report_missing_drv_callback(prt, "Input", "ready_input()"); - driver_select((ErlDrvPort) internal_port_index(prt->id), event, + driver_select((ErlDrvPort) prt, event, (ERL_DRV_READ | ERL_DRV_USE_NO_CALLBACK), 0); } @@ -5052,7 +7315,7 @@ no_ready_output_callback(ErlDrvData drv_data, ErlDrvEvent event) { Port *prt = get_current_port(); report_missing_drv_callback(prt, "Output", "ready_output()"); - driver_select((ErlDrvPort) internal_port_index(prt->id), event, + driver_select((ErlDrvPort) prt, event, (ERL_DRV_WRITE | ERL_DRV_USE_NO_CALLBACK), 0); } @@ -5087,13 +7350,13 @@ init_driver(erts_driver_t *drv, ErlDrvEntry *de, DE_Handle *handle) drv->lock = NULL; else { drv->lock = erts_alloc(ERTS_ALC_T_DRIVER_LOCK, - sizeof(erts_smp_mtx_t)); - erts_smp_mtx_init_x(drv->lock, - "driver_lock", + sizeof(erts_mtx_t)); + erts_mtx_init_x(drv->lock, + "driver_lock", #if defined(ERTS_ENABLE_LOCK_CHECK) || defined(ERTS_ENABLE_LOCK_COUNT) - am_atom_put(drv->name, sys_strlen(drv->name)) + am_atom_put(drv->name, sys_strlen(drv->name)) #else - NIL + NIL #endif ); } @@ -5165,7 +7428,7 @@ int erts_add_driver_entry(ErlDrvEntry *de, DE_Handle *handle, int driver_list_lo int res; if (!driver_list_locked) { - erts_smp_mtx_lock(&erts_driver_list_lock); + erts_smp_rwmtx_rwlock(&erts_driver_list_lock); } dp->next = driver_list; @@ -5194,7 +7457,7 @@ int erts_add_driver_entry(ErlDrvEntry *de, DE_Handle *handle, int driver_list_lo if (!driver_list_locked) { erts_smp_tsd_set(driver_list_lock_status_key, NULL); - erts_smp_mtx_unlock(&erts_driver_list_lock); + erts_smp_rwmtx_rwunlock(&erts_driver_list_lock); } return res; } @@ -5207,7 +7470,7 @@ int remove_driver_entry(ErlDrvEntry *drv) rec_lock = erts_smp_tsd_get(driver_list_lock_status_key); if (rec_lock == NULL) { - erts_smp_mtx_lock(&erts_driver_list_lock); + erts_smp_rwmtx_rwlock(&erts_driver_list_lock); } dp = driver_list; while (dp && dp->entry != drv) @@ -5215,7 +7478,7 @@ int remove_driver_entry(ErlDrvEntry *drv) if (dp) { if (dp->handle) { if (rec_lock == NULL) { - erts_smp_mtx_unlock(&erts_driver_list_lock); + erts_smp_rwmtx_rwunlock(&erts_driver_list_lock); } return -1; } @@ -5229,12 +7492,12 @@ int remove_driver_entry(ErlDrvEntry *drv) } erts_destroy_driver(dp); if (rec_lock == NULL) { - erts_smp_mtx_unlock(&erts_driver_list_lock); + erts_smp_rwmtx_rwunlock(&erts_driver_list_lock); } return 1; } if (rec_lock == NULL) { - erts_smp_mtx_unlock(&erts_driver_list_lock); + erts_smp_rwmtx_rwunlock(&erts_driver_list_lock); } return 0; } @@ -5264,18 +7527,22 @@ erl_drv_getenv(char *key, char *value, size_t *value_size) * - uses the fact that heart_port is registered when starting heart */ -Port *erts_get_heart_port() { +Port *erts_get_heart_port(void) +{ + int ix, max = erts_ptab_max(&erts_port); - Port* port; - Uint ix; + for (ix = 0; ix < max; ix++) { + struct reg_proc *reg; + Port *port = erts_pix2port(ix); - for(ix = 0; ix < erts_max_ports; ix++) { - port = &erts_port[ix]; + if (!port) + continue; /* only examine undead or alive ports */ - if (port->status & ERTS_PORT_SFLGS_DEAD) + if (erts_atomic32_read_nob(&port->state) & ERTS_PORT_SFLGS_DEAD) continue; /* immediate atom compare */ - if (port->reg && port->reg->name == am_heart_port) { + reg = port->common.u.alive.reg; + if (reg && reg->name == am_heart_port) { return port; } } |