diff options
43 files changed, 1023 insertions, 446 deletions
diff --git a/erts/emulator/beam/bif.c b/erts/emulator/beam/bif.c index adea7d007e..232597c5b6 100644 --- a/erts/emulator/beam/bif.c +++ b/erts/emulator/beam/bif.c @@ -52,7 +52,6 @@ Export *erts_await_result; static Export await_exit_trap; static Export* flush_monitor_messages_trap = NULL; static Export* set_cpu_topology_trap = NULL; -static Export* await_proc_exit_trap = NULL; static Export* await_port_send_result_trap = NULL; Export* erts_format_cpu_topology_trap = NULL; static Export dsend_continue_trap_export; @@ -4654,42 +4653,6 @@ static BIF_RETTYPE bif_return_trap(BIF_ALIST_2) BIF_RET(res); } -void -erts_bif_prep_await_proc_exit_data_trap(Process *c_p, Eterm pid, Eterm ret) -{ - ERTS_BIF_PREP_TRAP3_NO_RET(await_proc_exit_trap, c_p, pid, am_data, ret); -} - -void -erts_bif_prep_await_proc_exit_reason_trap(Process *c_p, Eterm pid) -{ - ERTS_BIF_PREP_TRAP3_NO_RET(await_proc_exit_trap, c_p, - pid, am_reason, am_undefined); -} - -void -erts_bif_prep_await_proc_exit_apply_trap(Process *c_p, - Eterm pid, - Eterm module, - Eterm function, - Eterm args[], - int nargs) -{ - Eterm term; - Eterm *hp; - int i; - ASSERT(is_atom(module) && is_atom(function)); - - hp = HAlloc(c_p, 4+2*nargs); - term = NIL; - for (i = nargs-1; i >= 0; i--) { - term = CONS(hp, args[i], term); - hp += 2; - } - term = TUPLE3(hp, module, function, term); - ERTS_BIF_PREP_TRAP3_NO_RET(await_proc_exit_trap, c_p, pid, am_apply, term); -} - Export bif_return_trap_export; void erts_init_trap_export(Export* ep, Eterm m, Eterm f, Uint a, @@ -4742,7 +4705,6 @@ void erts_init_bif(void) erts_format_cpu_topology_trap = erts_export_put(am_erlang, am_format_cpu_topology, 1); - await_proc_exit_trap = erts_export_put(am_erlang,am_await_proc_exit,3); await_port_send_result_trap = erts_export_put(am_erts_internal, am_await_port_send_result, 3); system_flag_scheduler_wall_time_trap diff --git a/erts/emulator/beam/bif.h b/erts/emulator/beam/bif.h index dca53686f4..a33421d762 100644 --- a/erts/emulator/beam/bif.h +++ b/erts/emulator/beam/bif.h @@ -437,67 +437,6 @@ do { \ ERTS_BIF_EXITED((PROC)); \ } while (0) -/* - * The ERTS_BIF_*_AWAIT_X_*_TRAP makros either exits the caller, or - * sets up a trap to erlang:await_proc_exit/3. - * - * The caller is acquired to hold the 'main' lock on C_P. No other locks - * are allowed to be held. - */ - -#define ERTS_BIF_PREP_AWAIT_X_DATA_TRAP(RET, C_P, PID, DATA) \ -do { \ - erts_bif_prep_await_proc_exit_data_trap((C_P), (PID), (DATA)); \ - (RET) = THE_NON_VALUE; \ -} while (0) - -#define ERTS_BIF_PREP_AWAIT_X_REASON_TRAP(RET, C_P, PID) \ -do { \ - erts_bif_prep_await_proc_exit_reason_trap((C_P), (PID)); \ - (RET) = THE_NON_VALUE; \ -} while (0) - -#define ERTS_BIF_PREP_AWAIT_X_APPLY_TRAP(RET, C_P, PID, M, F, A, AN) \ -do { \ - erts_bif_prep_await_proc_exit_apply_trap((C_P), (PID), \ - (M), (F), (A), (AN)); \ - (RET) = THE_NON_VALUE; \ -} while (0) - -#define ERTS_BIF_AWAIT_X_DATA_TRAP(C_P, PID, DATA) \ -do { \ - erts_bif_prep_await_proc_exit_data_trap((C_P), (PID), (DATA)); \ - return THE_NON_VALUE; \ -} while (0) - -#define ERTS_BIF_AWAIT_X_REASON_TRAP(C_P, PID) \ -do { \ - erts_bif_prep_await_proc_exit_reason_trap((C_P), (PID)); \ - return THE_NON_VALUE; \ -} while (0) - -#define ERTS_BIF_AWAIT_X_APPLY_TRAP(C_P, PID, M, F, A, AN) \ -do { \ - erts_bif_prep_await_proc_exit_apply_trap((C_P), (PID), \ - (M), (F), (A), (AN)); \ - return THE_NON_VALUE; \ -} while (0) - -void -erts_bif_prep_await_proc_exit_data_trap(Process *c_p, - Eterm pid, - Eterm data); -void -erts_bif_prep_await_proc_exit_reason_trap(Process *c_p, - Eterm pid); -void -erts_bif_prep_await_proc_exit_apply_trap(Process *c_p, - Eterm pid, - Eterm module, - Eterm function, - Eterm args[], - int nargs); - int erts_call_dirty_bif(ErtsSchedulerData *esdp, Process *c_p, BeamInstr *I, Eterm *reg); diff --git a/erts/emulator/beam/bif.tab b/erts/emulator/beam/bif.tab index 93613ac2eb..687fd39d58 100644 --- a/erts/emulator/beam/bif.tab +++ b/erts/emulator/beam/bif.tab @@ -266,6 +266,7 @@ bif erlang:demonitor/1 bif erlang:demonitor/2 bif erlang:is_process_alive/1 +bif erts_internal:is_process_alive/2 bif erlang:error/1 error_1 bif erlang:error/2 error_2 diff --git a/erts/emulator/beam/erl_bif_info.c b/erts/emulator/beam/erl_bif_info.c index 6106cfdcfd..bdca93428e 100644 --- a/erts/emulator/beam/erl_bif_info.c +++ b/erts/emulator/beam/erl_bif_info.c @@ -73,6 +73,9 @@ static Export *gather_msacc_res_trap; static Export *gather_gc_info_res_trap; static Export *gather_system_check_res_trap; +static Export *is_process_alive_trap; + + #define DECL_AM(S) Eterm AM_ ## S = am_atom_put(#S, sizeof(#S) - 1) static char otp_version[] = ERLANG_OTP_VERSION; @@ -3501,34 +3504,53 @@ fun_info_mfa_1(BIF_ALIST_1) BIF_ERROR(p, BADARG); } +BIF_RETTYPE erts_internal_is_process_alive_2(BIF_ALIST_2) +{ + if (!is_internal_pid(BIF_ARG_1) || !is_internal_ordinary_ref(BIF_ARG_2)) + BIF_ERROR(BIF_P, BADARG); + erts_proc_sig_send_is_alive_request(BIF_P, BIF_ARG_1, BIF_ARG_2); + BIF_RET(am_ok); +} + BIF_RETTYPE is_process_alive_1(BIF_ALIST_1) { - if(is_internal_pid(BIF_ARG_1)) { - Process *rp; - - if (BIF_ARG_1 == BIF_P->common.id) - BIF_RET(am_true); - - rp = erts_proc_lookup_raw(BIF_ARG_1); - if (!rp) { - BIF_RET(am_false); - } - else { - if (erts_atomic32_read_acqb(&rp->state) & ERTS_PSFLG_EXITING) - ERTS_BIF_AWAIT_X_DATA_TRAP(BIF_P, BIF_ARG_1, am_false); - else - BIF_RET(am_true); - } - } - else if(is_external_pid(BIF_ARG_1)) { - if(external_pid_dist_entry(BIF_ARG_1) == erts_this_dist_entry) + if (is_internal_pid(BIF_ARG_1)) { + erts_aint32_t state; + Process *rp; + + if (BIF_ARG_1 == BIF_P->common.id) + BIF_RET(am_true); + + rp = erts_proc_lookup_raw(BIF_ARG_1); + if (!rp) + BIF_RET(am_false); + + state = erts_atomic32_read_acqb(&rp->state); + if (state & (ERTS_PSFLG_EXITING + | ERTS_PSFLG_SIG_Q + | ERTS_PSFLG_SIG_IN_Q)) { + /* + * If in exiting state, trap out and send 'is alive' + * request and wait for it to complete termination. + * + * If process has signals enqueued, we need to + * send it an 'is alive' request via its signal + * queue in order to ensure that signal order is + * preserved (we may earlier have sent it an + * exit signal that has not been processed yet). + */ + BIF_TRAP1(is_process_alive_trap, BIF_P, BIF_ARG_1); + } + + BIF_RET(am_true); + } + + if (is_external_pid(BIF_ARG_1)) { + if (external_pid_dist_entry(BIF_ARG_1) == erts_this_dist_entry) BIF_RET(am_false); /* A pid from an old incarnation of this node */ - else - BIF_ERROR(BIF_P, BADARG); - } - else { - BIF_ERROR(BIF_P, BADARG); } + + BIF_ERROR(BIF_P, BADARG); } BIF_RETTYPE process_display_2(BIF_ALIST_2) @@ -5007,6 +5029,10 @@ erts_bif_info_init(void) = erts_export_put(am_erts_internal, am_gather_microstate_accounting_result, 2); gather_system_check_res_trap = erts_export_put(am_erts_internal, am_gather_system_check_result, 1); + + is_process_alive_trap = erts_export_put(am_erts_internal, am_is_process_alive, 1); + + process_info_init(); os_info_init(); } diff --git a/erts/emulator/beam/erl_message.c b/erts/emulator/beam/erl_message.c index 0565e01f06..51b7865c0b 100644 --- a/erts/emulator/beam/erl_message.c +++ b/erts/emulator/beam/erl_message.c @@ -323,7 +323,7 @@ erts_queue_dist_message(Process *rcvr, * TODO: We don't know the real size of the external message here. * -1 will appear to a D script as 4294967295. */ - DTRACE6(message_queued, receiver_name, -1, rcvr->msg.len + 1, + DTRACE6(message_queued, receiver_name, -1, rcvr->sig_qs.len + 1, tok_label, tok_lastcnt, tok_serial); } #endif diff --git a/erts/emulator/beam/erl_node_tables.c b/erts/emulator/beam/erl_node_tables.c index ca83e70046..1f147011a8 100644 --- a/erts/emulator/beam/erl_node_tables.c +++ b/erts/emulator/beam/erl_node_tables.c @@ -1051,14 +1051,16 @@ static void erts_lcnt_enable_dist_lock_count(void *dep_raw, void *enable) { if(enable) { erts_lcnt_install_new_lock_info(&dep->rwmtx.lcnt, "dist_entry", dep->sysname, ERTS_LOCK_TYPE_RWMUTEX | ERTS_LOCK_FLAGS_CATEGORY_DISTRIBUTION); - erts_lcnt_install_new_lock_info(&dep->lnk_mtx.lcnt, "dist_entry_links", dep->sysname, - ERTS_LOCK_TYPE_MUTEX | ERTS_LOCK_FLAGS_CATEGORY_DISTRIBUTION); erts_lcnt_install_new_lock_info(&dep->qlock.lcnt, "dist_entry_out_queue", dep->sysname, ERTS_LOCK_TYPE_MUTEX | ERTS_LOCK_FLAGS_CATEGORY_DISTRIBUTION); + if (dep->mld) + erts_lcnt_install_new_lock_info(&dep->mld->mtx.lcnt, "dist_entry_links", dep->sysname, + ERTS_LOCK_TYPE_MUTEX | ERTS_LOCK_FLAGS_CATEGORY_DISTRIBUTION); } else { erts_lcnt_uninstall(&dep->rwmtx.lcnt); - erts_lcnt_uninstall(&dep->lnk_mtx.lcnt); erts_lcnt_uninstall(&dep->qlock.lcnt); + if (dep->mld) + erts_lcnt_uninstall(&dep->mld->mtx.lcnt); } } diff --git a/erts/emulator/beam/erl_posix_str.c b/erts/emulator/beam/erl_posix_str.c index deb7e3e173..7b3e640d3f 100644 --- a/erts/emulator/beam/erl_posix_str.c +++ b/erts/emulator/beam/erl_posix_str.c @@ -156,6 +156,9 @@ erl_errno_id(error) #ifdef EFAULT case EFAULT: return "efault"; #endif +#ifdef EFTYPE + case EFTYPE: return "eftype"; +#endif #ifdef EFBIG case EFBIG: return "efbig"; #endif @@ -351,6 +354,9 @@ erl_errno_id(error) #if defined(EOPNOTSUPP) && (!defined(ENOTSUP) || (EOPNOTSUPP != ENOTSUP)) case EOPNOTSUPP: return "eopnotsupp"; #endif +#ifdef EOVERFLOW + case EOVERFLOW: return "eoverflow"; +#endif #ifdef EPERM case EPERM: return "eperm"; #endif diff --git a/erts/emulator/beam/erl_proc_sig_queue.c b/erts/emulator/beam/erl_proc_sig_queue.c index f07bd32723..1ba0b789ec 100644 --- a/erts/emulator/beam/erl_proc_sig_queue.c +++ b/erts/emulator/beam/erl_proc_sig_queue.c @@ -40,6 +40,7 @@ #include "erl_gc.h" #include "bif.h" #include "erl_proc_sig_queue.h" +#include "dtrace-wrapper.h" #define ERTS_SIG_REDS_CNT_FACTOR 4 #define ERTS_PROC_SIG_TRACE_COUNT_LIMIT 200 @@ -48,7 +49,7 @@ * Note that not all signal are handled using this functionality! */ -#define ERTS_SIG_Q_OP_MAX 9 +#define ERTS_SIG_Q_OP_MAX 10 #define ERTS_SIG_Q_OP_EXIT 0 #define ERTS_SIG_Q_OP_EXIT_LINKED 1 @@ -59,7 +60,8 @@ #define ERTS_SIG_Q_OP_UNLINK 6 #define ERTS_SIG_Q_OP_GROUP_LEADER 7 #define ERTS_SIG_Q_OP_TRACE_CHANGE_STATE 8 -#define ERTS_SIG_Q_OP_PERSISTENT_MON_MSG ERTS_SIG_Q_OP_MAX +#define ERTS_SIG_Q_OP_PERSISTENT_MON_MSG 9 +#define ERTS_SIG_Q_OP_IS_ALIVE ERTS_SIG_Q_OP_MAX #define ERTS_SIG_Q_TYPE_MAX (ERTS_MON_LNK_TYPE_MAX + 5) @@ -184,6 +186,11 @@ typedef struct { Eterm heap[1]; } ErtsSigGroupLeader; +typedef struct { + Eterm message; + Eterm requester; +} ErtsIsAliveRequest; + static int handle_msg_tracing(Process *c_p, ErtsSigRecvTracing *tracing, ErtsMessage ***next_nm_sig); @@ -359,20 +366,47 @@ sig_enqueue_trace(Process *c_p, ErtsMessage *sig, int op, #ifdef USE_VM_PROBES case ERTS_SIG_Q_OP_EXIT: - case ERTS_SIG_Q_OP_EXIT_LINKED: { - ErtsExitSignalData *xsigd = get_exit_signal_data(sig); - if(DTRACE_ENABLED(process_exit_signal) && is_pid(xsigd->from)) { - DTRACE_CHARBUF(sender_str, DTRACE_TERM_BUF_SIZE); - DTRACE_CHARBUF(receiver_str, DTRACE_TERM_BUF_SIZE); - DTRACE_CHARBUF(reason_buf, DTRACE_TERM_BUF_SIZE); + case ERTS_SIG_Q_OP_EXIT_LINKED: + + if (DTRACE_ENABLED(process_exit_signal)) { + Uint16 type = ERTS_PROC_SIG_TYPE(((ErtsSignal *) sig)->common.tag); + Eterm reason, from; + + if (type == ERTS_SIG_Q_TYPE_GEN_EXIT) { + ErtsExitSignalData *xsigd = get_exit_signal_data(sig); + reason = xsigd->reason; + from = xsigd->from; + } + else { + ErtsLink *lnk = (ErtsLink *) sig, *olnk; + + ASSERT(type == ERTS_LNK_TYPE_PROC + || type == ERTS_LNK_TYPE_PORT + || type == ERTS_LNK_TYPE_DIST_PROC); + + olnk = erts_link_to_other(lnk, NULL); + reason = lnk->other.item; + from = olnk->other.item; + } + + if (is_pid(from)) { - dtrace_pid_str(from, sender_str); - dtrace_proc_str(rp, receiver_str); - erts_snprintf(reason_buf, sizeof(DTRACE_CHARBUF_NAME(reason_buf)) - 1, "%T", reason); - DTRACE3(process_exit_signal, sender_str, receiver_str, reason_buf); + DTRACE_CHARBUF(sender_str, DTRACE_TERM_BUF_SIZE); + DTRACE_CHARBUF(receiver_str, DTRACE_TERM_BUF_SIZE); + DTRACE_CHARBUF(reason_buf, DTRACE_TERM_BUF_SIZE); + + if (reason == am_kill) { + reason = am_killed; + } + + dtrace_pid_str(from, sender_str); + dtrace_proc_str(rp, receiver_str); + erts_snprintf(reason_buf, sizeof(DTRACE_CHARBUF_NAME(reason_buf)) - 1, "%T", reason); + DTRACE3(process_exit_signal, sender_str, receiver_str, reason_buf); + } } break; - } + #endif default: @@ -548,6 +582,43 @@ proc_queue_signal(Process *c_p, Eterm pid, ErtsSignal *sig, int op) return res; } +static int +maybe_elevate_sig_handling_prio(Process *c_p, Eterm other) +{ + /* + * returns: + * > 0 -> elevated prio; process alive or exiting + * < 0 -> no elevation needed; process alive or exiting + * 0 -> process terminated (free) + */ + int res; + Process *rp; + erts_aint32_t state, my_prio, other_prio; + + rp = erts_proc_lookup_raw(other); + if (!rp) + res = 0; + else { + res = -1; + state = erts_atomic32_read_nob(&c_p->state); + my_prio = ERTS_PSFLGS_GET_USR_PRIO(state); + + state = erts_atomic32_read_nob(&rp->state); + other_prio = ERTS_PSFLGS_GET_USR_PRIO(state); + + if (other_prio > my_prio) { + /* Others prio is lower than mine; elevate it... */ + res = !!erts_sig_prio(other, my_prio); + if (res) { + /* ensure handled if dirty executing... */ + state = erts_atomic32_read_nob(&rp->state); + ensure_dirty_proc_handled(other, state, my_prio); + } + } + } + return res; +} + void erts_proc_sig_fetch(Process *proc) { @@ -681,13 +752,14 @@ send_gen_exit_signal(Process *c_p, Eterm from_tag, seq_trace_update_send(c_p); #ifdef USE_VM_PROBES + utag_sz = 0; + utag = NIL; if (c_p && token != NIL && (DT_UTAG_FLAGS(c_p) & DT_UTAG_SPREADING)) { utag_sz = size_object(DT_UTAG(c_p)); utag = DT_UTAG(c_p); } else if (token == am_have_dt_utag) { - utag_sz = 0; - utag = token = NIL; + token = NIL; } hsz += utag_sz; #endif @@ -765,7 +837,7 @@ send_gen_exit_signal(Process *c_p, Eterm from_tag, s_utag = (is_immed(utag) ? utag : copy_struct(utag, utag_sz, &hp, ohp)); - ERL_MESSAGE_DT_UTAG(mp) = utag; + ERL_MESSAGE_DT_UTAG(mp) = s_utag; #endif ERL_MESSAGE_TERM(mp) = ERTS_PROC_SIG_MAKE_TAG(op, @@ -1215,33 +1287,10 @@ erts_proc_sig_send_group_leader(Process *c_p, Eterm to, Eterm gl, Eterm ref) if (!res) destroy_sig_group_leader(sgl); else if (c_p) { - int prio_res = !0; erts_aint_t flags, rm_flags = ERTS_SIG_GL_FLG_SENDER; - Process *rp; - erts_aint32_t state, my_prio, other_prio; - - state = erts_atomic32_read_nob(&c_p->state); - my_prio = ERTS_PSFLGS_GET_USR_PRIO(state); - - rp = erts_proc_lookup_raw(to); - if (!rp) - prio_res = 0; - else { - state = erts_atomic32_read_nob(&rp->state); - other_prio = ERTS_PSFLGS_GET_USR_PRIO(state); - - if (other_prio > my_prio) { - /* Others prio is lower than mine; elevate it... */ - prio_res = erts_sig_prio(to, my_prio); - if (prio_res) { - state = erts_atomic32_read_nob(&rp->state); - ensure_dirty_proc_handled(to, state, my_prio); - } - } - } + int prio_res = maybe_elevate_sig_handling_prio(c_p, to); if (!prio_res) rm_flags |= ERTS_SIG_GL_FLG_ACTIVE; - flags = erts_atomic_read_band_nob(&sgl->flags, ~rm_flags); if (!prio_res && (flags & ERTS_SIG_GL_FLG_ACTIVE)) res = 0; /* We deactivated signal... */ @@ -1253,6 +1302,99 @@ erts_proc_sig_send_group_leader(Process *c_p, Eterm to, Eterm gl, Eterm ref) group_leader_reply(c_p, c_p->common.id, ref, 0); } +void +erts_proc_sig_send_is_alive_request(Process *c_p, Eterm to, Eterm ref) +{ + ErlHeapFragment *hfrag; + Uint hsz; + Eterm *hp, *start_hp, ref_cpy, msg; + ErlOffHeap *ohp; + ErtsMessage *mp; + ErtsIsAliveRequest *alive_req; + + ASSERT(is_internal_ordinary_ref(ref)); + + hsz = ERTS_REF_THING_SIZE + 3 + sizeof(ErtsIsAliveRequest)/sizeof(Eterm); + + mp = erts_alloc_message(hsz, &hp); + hfrag = &mp->hfrag; + mp->next = NULL; + ohp = &hfrag->off_heap; + start_hp = hp; + + ref_cpy = STORE_NC(&hp, ohp, ref); + msg = TUPLE2(hp, ref_cpy, am_false); /* default res 'false' */ + hp += 3; + + hfrag->used_size = hp - start_hp; + + alive_req = (ErtsIsAliveRequest *) (char *) hp; + alive_req->message = msg; + alive_req->requester = c_p->common.id; + + ERL_MESSAGE_TERM(mp) = ERTS_PROC_SIG_MAKE_TAG(ERTS_SIG_Q_OP_IS_ALIVE, + ERTS_SIG_Q_TYPE_UNDEFINED, + 0); + ERL_MESSAGE_TOKEN(mp) = NIL; + ERL_MESSAGE_FROM(mp) = am_system; +#ifdef USE_VM_PROBES + ERL_MESSAGE_DT_UTAG(mp) = NIL; +#endif + + if (proc_queue_signal(c_p, to, (ErtsSignal *) mp, ERTS_SIG_Q_OP_IS_ALIVE)) + (void) maybe_elevate_sig_handling_prio(c_p, to); + else { + /* It wasn't alive; reply to ourselves... */ + mp->next = NULL; + mp->data.attached = ERTS_MSG_COMBINED_HFRAG; + erts_queue_message(c_p, ERTS_PROC_LOCK_MAIN, + mp, msg, am_system); + } +} + +static void +is_alive_response(Process *c_p, ErtsMessage *mp, int is_alive) +{ + /* + * Sender prepared the message for us. Just patch + * the result if necessary. The default prepared + * result is 'false'. + */ + Process *rp; + ErtsIsAliveRequest *alive_req; + + alive_req = (ErtsIsAliveRequest *) (char *) (&mp->hfrag.mem[0] + + mp->hfrag.used_size); + + + ASSERT(ERTS_SIG_IS_NON_MSG(mp)); + ASSERT(ERTS_PROC_SIG_OP(((ErtsSignal *) mp)->common.tag) + == ERTS_SIG_Q_OP_IS_ALIVE); + ASSERT(mp->hfrag.alloc_size > mp->hfrag.used_size); + ASSERT((mp->hfrag.alloc_size - mp->hfrag.used_size)*sizeof(UWord) + >= sizeof(ErtsIsAliveRequest)); + ASSERT(is_internal_pid(alive_req->requester)); + ASSERT(alive_req->requester != c_p->common.id); + ASSERT(is_tuple_arity(alive_req->message, 2)); + ASSERT(is_internal_ordinary_ref(tuple_val(alive_req->message)[1])); + ASSERT(tuple_val(alive_req->message)[2] == am_false); + + ERL_MESSAGE_TERM(mp) = alive_req->message; + mp->data.attached = ERTS_MSG_COMBINED_HFRAG; + mp->next = NULL; + + rp = erts_proc_lookup(alive_req->requester); + if (!rp) + erts_cleanup_messages(mp); + else { + if (is_alive) { /* patch result... */ + Eterm *tp = tuple_val(alive_req->message); + tp[2] = am_true; + } + erts_queue_message(rp, 0, mp, alive_req->message, am_system); + } +} + static ERTS_INLINE void adjust_tracing_state(Process *c_p, ErtsSigRecvTracing *tracing, int setup) { @@ -1447,8 +1589,8 @@ handle_exit_signal(Process *c_p, ErtsSigRecvTracing *tracing, { ErtsMessage *conv_msg = NULL; ErtsExitSignalData *xsigd = NULL; - ErtsLinkData *ldp; - ErtsLink *dlnk; + ErtsLinkData *ldp = NULL; /* Avoid erroneous warning... */ + ErtsLink *dlnk = NULL; /* Avoid erroneous warning... */ Eterm tag = ((ErtsSignal *) sig)->common.tag; Uint16 type = ERTS_PROC_SIG_TYPE(tag); int op = ERTS_PROC_SIG_OP(tag); @@ -1472,8 +1614,6 @@ handle_exit_signal(Process *c_p, ErtsSigRecvTracing *tracing, /* Link no longer active; ignore... */ ignore = !0; destroy = !0; - ldp = NULL; /* Avoid erroneous warning... */ - dlnk = NULL; /* Avoid erroneous warning... */ } else { ignore = 0; @@ -2355,6 +2495,13 @@ erts_proc_sig_handle_incoming(Process *c_p, erts_aint32_t *statep, break; } + case ERTS_SIG_Q_OP_IS_ALIVE: + ERTS_PROC_SIG_HDBG_PRIV_CHKQ(c_p, &tracing, next_nm_sig); + remove_nm_sig(c_p, sig, next_nm_sig); + is_alive_response(c_p, sig, !0); + ERTS_PROC_SIG_HDBG_PRIV_CHKQ(c_p, &tracing, next_nm_sig); + break; + case ERTS_SIG_Q_OP_TRACE_CHANGE_STATE: { Uint16 type = ERTS_PROC_SIG_TYPE(tag); @@ -2667,6 +2814,12 @@ erts_proc_sig_handle_exit(Process *c_p, int *redsp) break; } + case ERTS_SIG_Q_OP_IS_ALIVE: + ERTS_PROC_SIG_HDBG_PRIV_CHKQ(c_p, &tracing, next_nm_sig); + is_alive_response(c_p, sig, 0); + ERTS_PROC_SIG_HDBG_PRIV_CHKQ(c_p, &tracing, next_nm_sig); + break; + case ERTS_SIG_Q_OP_TRACE_CHANGE_STATE: destroy_trace_info((ErtsSigTraceInfo *) sig); break; @@ -2803,6 +2956,7 @@ erts_proc_sig_signal_size(ErtsSignal *sig) break; case ERTS_SIG_Q_OP_PERSISTENT_MON_MSG: + case ERTS_SIG_Q_OP_IS_ALIVE: size = ((ErtsMessage *) sig)->hfrag.alloc_size; size *= sizeof(Eterm); size += sizeof(ErtsMessage) - sizeof(Eterm); @@ -3514,6 +3668,7 @@ erts_proc_sig_debug_foreach_sig(Process *c_p, break; } + case ERTS_SIG_Q_OP_IS_ALIVE: case ERTS_SIG_Q_OP_TRACE_CHANGE_STATE: break; diff --git a/erts/emulator/beam/erl_proc_sig_queue.h b/erts/emulator/beam/erl_proc_sig_queue.h index 433e30ce4a..56fe3e683e 100644 --- a/erts/emulator/beam/erl_proc_sig_queue.h +++ b/erts/emulator/beam/erl_proc_sig_queue.h @@ -31,6 +31,7 @@ * - Link * - Unlink * - Group leader + * - Is process alive * - Trace change * * The signal queue consists of three parts: @@ -426,6 +427,30 @@ void erts_proc_sig_send_group_leader(Process *c_p, Eterm to, Eterm gl, Eterm ref); +/** + * + * @brief Send an 'is process alive' signal to a process. + * + * A response message '{Ref, Result}' is sent to the + * sender when performed where Ref is the reference passed + * as 'ref' argument, and Result is either 'true' or 'false'. + * + * @param[in] c_p Pointer to process struct of + * currently executing process. + * NULL if signal arrived via + * distribution. + * + * @param[in] to Identifier of receiver. + * + * @param[in] ref Reference to use in response + * message to the sending + * process (i.e., c_p). + * + */ +void +erts_proc_sig_send_is_alive_request(Process *c_p, Eterm to, + Eterm ref); + /* * End of send operations of currently supported process signals. */ diff --git a/erts/emulator/beam/erl_process.c b/erts/emulator/beam/erl_process.c index 7969025f57..374583ec47 100644 --- a/erts/emulator/beam/erl_process.c +++ b/erts/emulator/beam/erl_process.c @@ -10501,6 +10501,8 @@ done: return st; } + +static void exit_permanent_prio_elevation(Process *c_p, erts_aint32_t state); static void save_gc_task(Process *c_p, ErtsProcSysTask *st, int prio); static void save_dirty_task(Process *c_p, ErtsProcSysTask *st); @@ -10633,8 +10635,10 @@ execute_sys_tasks(Process *c_p, erts_aint32_t *statep, int in_reds) reds, local_only); reds -= sig_reds; - if (state & ERTS_PSFLG_EXITING) - goto perm_elevate_prio; + if (state & ERTS_PSFLG_EXITING) { + exit_permanent_prio_elevation(c_p, state); + break; + } if (sig_res) break; @@ -10648,37 +10652,8 @@ execute_sys_tasks(Process *c_p, erts_aint32_t *statep, int in_reds) st = NULL; } else { - erts_aint32_t a; - state = erts_atomic32_read_nob(&c_p->state); - - perm_elevate_prio: - - /* - * we are about to terminate; permanently elevate - * prio in order to ensure high prio signal - * handling... - */ - - a = state; - while (1) { - erts_aint32_t aprio, uprio, n, e; - ASSERT(!(a & ERTS_PSFLG_FREE)); - aprio = ERTS_PSFLGS_GET_ACT_PRIO(a); - uprio = ERTS_PSFLGS_GET_USR_PRIO(a); - if (aprio >= uprio) - break; /* user prio >= actual prio */ - /* - * actual prio is higher than user prio; raise - * user prio to actual prio... - */ - n = e = a; - n &= ~ERTS_PSFLGS_USR_PRIO_MASK; - n |= aprio << ERTS_PSFLGS_USR_PRIO_OFFSET; - a = erts_atomic32_cmpxchg_mb(&c_p->state, n, e); - if (a == e) - break; - } + exit_permanent_prio_elevation(c_p, state); } break; } @@ -10730,12 +10705,15 @@ cleanup_sys_tasks(Process *c_p, erts_aint32_t in_state, int in_reds) } switch (st->type) { + case ERTS_PSTT_PRIO_SIG: + state = erts_atomic32_read_nob(&c_p->state); + exit_permanent_prio_elevation(c_p, state); + /* fall through... */ case ERTS_PSTT_GC_MAJOR: case ERTS_PSTT_GC_MINOR: case ERTS_PSTT_CPC: case ERTS_PSTT_COHMQ: case ERTS_PSTT_ETS_FREE_FIXATION: - case ERTS_PSTT_PRIO_SIG: st_res = am_false; break; case ERTS_PSTT_CLA: @@ -10759,6 +10737,36 @@ cleanup_sys_tasks(Process *c_p, erts_aint32_t in_state, int in_reds) return reds; } +static void +exit_permanent_prio_elevation(Process *c_p, erts_aint32_t state) +{ + erts_aint32_t a; + /* + * we are about to terminate; permanently elevate + * prio in order to ensure high prio signal + * handling... + */ + a = state; + while (1) { + erts_aint32_t aprio, uprio, n, e; + ASSERT(a & ERTS_PSFLG_EXITING); + ASSERT(!(a & ERTS_PSFLG_FREE)); + aprio = ERTS_PSFLGS_GET_ACT_PRIO(a); + uprio = ERTS_PSFLGS_GET_USR_PRIO(a); + if (aprio >= uprio) + break; /* user prio >= actual prio */ + /* + * actual prio is higher than user prio; raise + * user prio to actual prio... + */ + n = e = a; + n &= ~ERTS_PSFLGS_USR_PRIO_MASK; + n |= aprio << ERTS_PSFLGS_USR_PRIO_OFFSET; + a = erts_atomic32_cmpxchg_mb(&c_p->state, n, e); + if (a == e) + break; + } +} void erts_execute_dirty_system_task(Process *c_p) @@ -12752,16 +12760,13 @@ erts_continue_exit_process(Process *p) erts_set_gc_state(p, 1); state = erts_atomic32_read_acqb(&p->state); - if ((state & ERTS_PSFLG_SYS_TASKS) - || p->dirty_sys_tasks - ) { + if ((state & ERTS_PSFLG_SYS_TASKS) || p->dirty_sys_tasks) { if (cleanup_sys_tasks(p, state, CONTEXT_REDS) >= CONTEXT_REDS/2) goto yield; } #ifdef DEBUG erts_proc_lock(p, ERTS_PROC_LOCK_STATUS); - ASSERT(p->sys_task_qs == NULL); ASSERT(ERTS_PROC_GET_DELAYED_GC_TASK_QS(p) == NULL); ASSERT(p->dirty_sys_tasks == NULL); erts_proc_unlock(p, ERTS_PROC_LOCK_STATUS); @@ -12873,7 +12878,30 @@ erts_continue_exit_process(Process *p) ? ERTS_PROC_SET_DIST_ENTRY(p, NULL) : NULL); - erts_proc_unlock(p, ERTS_PROC_LOCKS_ALL); + + /* + * It might show up signal prio elevation tasks until we + * have entered free state. Cleanup such tasks now. + */ + state = erts_atomic32_read_acqb(&p->state); + if (!(state & ERTS_PSFLG_SYS_TASKS)) + erts_proc_unlock(p, ERTS_PROC_LOCKS_ALL); + else { + erts_proc_unlock(p, ERTS_PROC_LOCKS_ALL_MINOR); + + do { + (void) cleanup_sys_tasks(p, state, CONTEXT_REDS); + state = erts_atomic32_read_acqb(&p->state); + } while (state & ERTS_PSFLG_SYS_TASKS); + + erts_proc_unlock(p, ERTS_PROC_LOCK_MAIN); + } + +#ifdef DEBUG + erts_proc_lock(p, ERTS_PROC_LOCK_STATUS); + ASSERT(p->sys_task_qs == NULL); + erts_proc_unlock(p, ERTS_PROC_LOCK_STATUS); +#endif if (dep) { erts_do_net_exits(dep, (reason == am_kill) ? am_killed : reason); diff --git a/erts/emulator/beam/io.c b/erts/emulator/beam/io.c index b2afdc6bf2..9f87285b71 100644 --- a/erts/emulator/beam/io.c +++ b/erts/emulator/beam/io.c @@ -2361,6 +2361,21 @@ set_port_connected(int bang_op, trace_port(prt, am_getting_linked, connect); } +#ifdef USE_VM_PROBES + if (DTRACE_ENABLED(port_connect)) { + Eterm old_connected = ERTS_PORT_GET_CONNECTED(prt); + 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(old_connected, process_str); + erts_snprintf(port_str, sizeof(DTRACE_CHARBUF_NAME(port_str)), + "%T", prt->common.id); + dtrace_pid_str(connect, newprocess_str); + DTRACE4(port_connect, process_str, port_str, prt->name, newprocess_str); + } +#endif + ERTS_PORT_SET_CONNECTED(prt, connect); if (IS_TRACED_FL(prt, F_TRACE_RECEIVE)) @@ -2370,18 +2385,6 @@ set_port_connected(int bang_op, trace_port_send(prt, from, TUPLE2(hp, prt->common.id, am_connected), 1); } -#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(DTRACE_CHARBUF_NAME(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; diff --git a/erts/emulator/beam/msg_instrs.tab b/erts/emulator/beam/msg_instrs.tab index 58cad9c666..289436da6f 100644 --- a/erts/emulator/beam/msg_instrs.tab +++ b/erts/emulator/beam/msg_instrs.tab @@ -235,7 +235,7 @@ remove_message() { } DTRACE6(message_receive, receiver_name, size_object(ERL_MESSAGE_TERM(msgp)), - c_p->msg.len - 1, tok_label, tok_lastcnt, tok_serial); + c_p->sig_qs.len - 1, tok_label, tok_lastcnt, tok_serial); } #endif UNLINK_MESSAGE(c_p, msgp); diff --git a/erts/emulator/test/bif_SUITE.erl b/erts/emulator/test/bif_SUITE.erl index d16c6a320d..22706ae8b1 100644 --- a/erts/emulator/test/bif_SUITE.erl +++ b/erts/emulator/test/bif_SUITE.erl @@ -34,7 +34,8 @@ erl_crash_dump_bytes/1, is_builtin/1, error_stacktrace/1, error_stacktrace_during_call_trace/1, - group_leader_prio/1, group_leader_prio_dirty/1]). + group_leader_prio/1, group_leader_prio_dirty/1, + is_process_alive/1]). suite() -> [{ct_hooks,[ts_install_cth]}, @@ -48,7 +49,8 @@ all() -> atom_to_binary, binary_to_atom, binary_to_existing_atom, erl_crash_dump_bytes, min_max, erlang_halt, is_builtin, error_stacktrace, error_stacktrace_during_call_trace, - group_leader_prio, group_leader_prio_dirty]. + group_leader_prio, group_leader_prio_dirty, + is_process_alive]. %% Uses erlang:display to test that erts_printf does not do deep recursion display(Config) when is_list(Config) -> @@ -1076,6 +1078,27 @@ group_leader_prio_test(Dirty) -> TLs), ok. +is_process_alive(Config) when is_list(Config) -> + process_flag(priority, max), + Ps = lists:map(fun (_) -> + spawn_opt(fun () -> tok_loop() end, + [{priority, high}, link]) + end, + lists:seq(1, 2*erlang:system_info(schedulers))), + receive after 1000 -> ok end, %% Wait for load to spread + lists:foreach(fun (P) -> + %% Ensure that signal order is preserved + %% and that we are not starved due to + %% priority inversion + true = erlang:is_process_alive(P), + unlink(P), + true = erlang:is_process_alive(P), + exit(P, kill), + false = erlang:is_process_alive(P) + end, + Ps), + ok. + %% helpers id(I) -> I. diff --git a/erts/preloaded/ebin/erlang.beam b/erts/preloaded/ebin/erlang.beam Binary files differindex 4d1691d71a..e93f053e01 100644 --- a/erts/preloaded/ebin/erlang.beam +++ b/erts/preloaded/ebin/erlang.beam diff --git a/erts/preloaded/ebin/erts_internal.beam b/erts/preloaded/ebin/erts_internal.beam Binary files differindex 799c3e17fb..f5967780ad 100644 --- a/erts/preloaded/ebin/erts_internal.beam +++ b/erts/preloaded/ebin/erts_internal.beam diff --git a/erts/preloaded/src/erlang.erl b/erts/preloaded/src/erlang.erl index f8221868e2..bffa59338e 100644 --- a/erts/preloaded/src/erlang.erl +++ b/erts/preloaded/src/erlang.erl @@ -39,7 +39,6 @@ -export([integer_to_list/2]). -export([integer_to_binary/2]). -export([set_cpu_topology/1, format_cpu_topology/1]). --export([await_proc_exit/3]). -export([memory/0, memory/1]). -export([alloc_info/1, alloc_sizes/1]). @@ -3530,33 +3529,6 @@ rvrs(Xs) -> rvrs(Xs, []). rvrs([],Ys) -> Ys; rvrs([X|Xs],Ys) -> rvrs(Xs, [X|Ys]). -%% erlang:await_proc_exit/3 is for internal use only! -%% -%% BIFs that need to await a specific process exit before -%% returning traps to erlang:await_proc_exit/3. -%% -%% NOTE: This function is tightly coupled to -%% the implementation of the -%% erts_bif_prep_await_proc_exit_*() -%% functions in bif.c. Do not make -%% any changes to it without reading -%% the comment about them in bif.c! --spec erlang:await_proc_exit(dst(), 'apply' | 'data' | 'reason', term()) -> term(). -await_proc_exit(Proc, Op, Data) -> - Mon = erlang:monitor(process, Proc), - receive - {'DOWN', Mon, process, _Proc, Reason} -> - case Op of - apply -> - {M, F, A} = Data, - erlang:apply(M, F, A); - data -> - Data; - reason -> - Reason - end - end. - -spec min(Term1, Term2) -> Minimum when Term1 :: term(), Term2 :: term(), diff --git a/erts/preloaded/src/erts_internal.erl b/erts/preloaded/src/erts_internal.erl index fb709e7482..da5c9c68ed 100644 --- a/erts/preloaded/src/erts_internal.erl +++ b/erts/preloaded/src/erts_internal.erl @@ -78,6 +78,8 @@ %% Auto import name clash -export([check_process_code/1]). +-export([is_process_alive/1, is_process_alive/2]). + %% %% Await result of send to port %% @@ -600,3 +602,22 @@ group_leader(_GL, _Pid) -> group_leader(_GL, _Pid, _Ref) -> erlang:nif_error(undefined). + +-spec erts_internal:is_process_alive(Pid, Ref) -> 'ok' when + Pid :: pid(), + Ref :: reference(). + +is_process_alive(_Pid, _Ref) -> + erlang:nif_error(undefined). + +-spec erts_internal:is_process_alive(Pid) -> boolean() when + Pid :: pid(). + +is_process_alive(Pid) -> + Ref = make_ref(), + erts_internal:is_process_alive(Pid, Ref), + receive + {Ref, Res} -> + Res + end. + diff --git a/lib/compiler/src/beam_clean.erl b/lib/compiler/src/beam_clean.erl index 7ddf9fa2e2..955c128699 100644 --- a/lib/compiler/src/beam_clean.erl +++ b/lib/compiler/src/beam_clean.erl @@ -254,7 +254,7 @@ bs_restores([_|Is], Dict) -> bs_restores([], Dict) -> Dict. %% Pass 2. -bs_replace([{test,bs_start_match2,F,Live,[Src,Ctx],CtxR}|T], Dict, Acc) when is_atom(Ctx) -> +bs_replace([{test,bs_start_match2,F,Live,[Src,{context,Ctx}],CtxR}|T], Dict, Acc) -> Slots = case gb_trees:lookup(Ctx, Dict) of {value,Slots0} -> Slots0; none -> 0 diff --git a/lib/compiler/src/cerl_inline.erl b/lib/compiler/src/cerl_inline.erl index f5afa75b16..caff47dbcb 100644 --- a/lib/compiler/src/cerl_inline.erl +++ b/lib/compiler/src/cerl_inline.erl @@ -1822,6 +1822,14 @@ new_var(Env) -> Name = env__new_vname(Env), c_var(Name). +%% The way a template variable is used makes it necessary +%% to make sure that it is unique in the entire function. +%% Therefore, template variables are atoms with the prefix "@i". + +new_template_var(Env) -> + Name = env__new_tname(Env), + c_var(Name). + residualize_var(R, S) -> S1 = count_size(weight(var), S), {ref_to_var(R), st__set_var_referenced(R#ref.loc, S1)}. @@ -2183,7 +2191,7 @@ make_template(E, Vs0, Env0) -> T = make_data_skel(data_type(E), Ts), E1 = update_data(E, data_type(E), [hd(get_ann(T)) || T <- Ts]), - V = new_var(Env1), + V = new_template_var(Env1), Env2 = env__bind(var_name(V), E1, Env1), {set_ann(T, [V]), [V | Vs1], Env2}; false -> @@ -2198,7 +2206,7 @@ make_template(E, Vs0, Env0) -> Env2 = env__bind(V, E1, Env1), {T, Vs1, Env2}; _ -> - V = new_var(Env0), + V = new_template_var(Env0), Env1 = env__bind(var_name(V), E, Env0), {set_ann(V, [V]), [V | Vs0], Env1} end @@ -2564,6 +2572,11 @@ env__is_defined(Key, Env) -> env__new_vname(Env) -> rec_env:new_key(Env). +env__new_tname(Env) -> + rec_env:new_key(fun(I) -> + list_to_atom("@i"++integer_to_list(I)) + end, Env). + env__new_fname(A, N, Env) -> rec_env:new_key(fun (X) -> S = integer_to_list(X), diff --git a/lib/compiler/src/cerl_trees.erl b/lib/compiler/src/cerl_trees.erl index f30a0b33ac..c7a129b42c 100644 --- a/lib/compiler/src/cerl_trees.erl +++ b/lib/compiler/src/cerl_trees.erl @@ -22,7 +22,8 @@ -module(cerl_trees). -export([depth/1, fold/3, free_variables/1, get_label/1, label/1, label/2, - map/2, mapfold/3, mapfold/4, size/1, variables/1]). + map/2, mapfold/3, mapfold/4, next_free_variable_name/1, + size/1, variables/1]). -import(cerl, [alias_pat/1, alias_var/1, ann_c_alias/3, ann_c_apply/3, ann_c_binary/2, ann_c_bitstr/6, ann_c_call/4, @@ -507,6 +508,7 @@ mapfold_pairs(_, _, S, []) -> %% well-formed Core Erlang syntax tree. %% %% @see free_variables/1 +%% @see next_free_variable_name/1 -spec variables(cerl:cerl()) -> [cerl:var_name()]. @@ -519,6 +521,7 @@ variables(T) -> %% @doc Like <code>variables/1</code>, but only includes variables %% that are free in the tree. %% +%% @see next_free_variable_name/1 %% @see variables/1 -spec free_variables(cerl:cerl()) -> [cerl:var_name()]. @@ -678,6 +681,110 @@ var_list_names([V | Vs], A) -> var_list_names([], A) -> A. +%% --------------------------------------------------------------------- + +%% @spec next_free_variable_name(Tree::cerl()) -> var_name() +%% +%% var_name() = integer() +%% +%% @doc Returns a integer variable name higher than any other integer +%% variable name in the syntax tree. An exception is thrown if +%% <code>Tree</code> does not represent a well-formed Core Erlang +%% syntax tree. +%% +%% @see variables/1 +%% @see free_variables/1 + +-spec next_free_variable_name(cerl:cerl()) -> integer(). + +next_free_variable_name(T) -> + 1 + next_free(T, -1). + +next_free(T, Max) -> + case type(T) of + literal -> + Max; + var -> + case var_name(T) of + Int when is_integer(Int) -> + max(Int, Max); + _ -> + Max + end; + values -> + next_free_in_list(values_es(T), Max); + cons -> + next_free(cons_hd(T), next_free(cons_tl(T), Max)); + tuple -> + next_free_in_list(tuple_es(T), Max); + map -> + next_free_in_list([map_arg(T)|map_es(T)], Max); + map_pair -> + next_free_in_list([map_pair_op(T),map_pair_key(T), + map_pair_val(T)], Max); + 'let' -> + Max1 = next_free(let_body(T), Max), + Max2 = next_free_in_list(let_vars(T), Max1), + next_free(let_arg(T), Max2); + seq -> + next_free(seq_arg(T), + next_free(seq_body(T), Max)); + apply -> + next_free(apply_op(T), + next_free_in_list(apply_args(T), Max)); + call -> + next_free(call_module(T), + next_free(call_name(T), + next_free_in_list( + call_args(T), Max))); + primop -> + next_free_in_list(primop_args(T), Max); + 'case' -> + next_free(case_arg(T), + next_free_in_list(case_clauses(T), Max)); + clause -> + Max1 = next_free(clause_guard(T), + next_free(clause_body(T), Max)), + next_free_in_list(clause_pats(T), Max1); + alias -> + next_free(alias_var(T), + next_free(alias_pat(T), Max)); + 'fun' -> + next_free(fun_body(T), + next_free_in_list(fun_vars(T), Max)); + 'receive' -> + Max1 = next_free_in_list(receive_clauses(T), + next_free(receive_timeout(T), Max)), + next_free(receive_action(T), Max1); + 'try' -> + Max1 = next_free(try_body(T), Max), + Max2 = next_free_in_list(try_vars(T), Max1), + Max3 = next_free(try_handler(T), Max2), + Max4 = next_free_in_list(try_evars(T), Max3), + next_free(try_arg(T), Max4); + 'catch' -> + next_free(catch_body(T), Max); + binary -> + next_free_in_list(binary_segments(T), Max); + bitstr -> + next_free(bitstr_val(T), next_free(bitstr_size(T), Max)); + letrec -> + Max1 = next_free_in_defs(letrec_defs(T), Max), + Max2 = next_free(letrec_body(T), Max1), + next_free_in_list(letrec_vars(T), Max2); + module -> + next_free_in_defs(module_defs(T), Max) + end. + +next_free_in_list([H | T], Max) -> + next_free_in_list(T, next_free(H, Max)); +next_free_in_list([], Max) -> + Max. + +next_free_in_defs([{_, Post} | Ds], Max) -> + next_free_in_defs(Ds, next_free(Post, Max)); +next_free_in_defs([], Max) -> + Max. %% --------------------------------------------------------------------- diff --git a/lib/compiler/src/sys_core_fold.erl b/lib/compiler/src/sys_core_fold.erl index a9bd363ee1..395b6bd677 100644 --- a/lib/compiler/src/sys_core_fold.erl +++ b/lib/compiler/src/sys_core_fold.erl @@ -108,17 +108,29 @@ module(#c_module{defs=Ds0}=Mod, Opts) -> put(no_inline_list_funcs, not member(inline_list_funcs, Opts)), - case get(new_var_num) of - undefined -> put(new_var_num, 0); - _ -> ok - end, init_warnings(), Ds1 = [function_1(D) || D <- Ds0], + erase(new_var_num), erase(no_inline_list_funcs), {ok,Mod#c_module{defs=Ds1},get_warnings()}. function_1({#c_var{name={F,Arity}}=Name,B0}) -> + %% Find a suitable starting value for the variable counter. Note + %% that this pass assumes that new_var_name/1 returns a variable + %% name distinct from any variable used in the entire body of + %% the function. We use integers as variable names to avoid + %% filling up the atom table when compiling huge functions. + Count = cerl_trees:next_free_variable_name(B0), + put(new_var_num, Count), try + %% Find a suitable starting value for the variable + %% counter. Note that this pass assumes that new_var_name/1 + %% returns a variable name distinct from any variable used in + %% the entire body of the function. We use integers as + %% variable names to avoid filling up the atom table when + %% compiling huge functions. + Count = cerl_trees:next_free_variable_name(B0), + put(new_var_num, Count), B = find_fixpoint(fun(Core) -> %% This must be a fun! expr(Core, value, sub_new()) @@ -2154,7 +2166,7 @@ make_var(A) -> make_var_name() -> N = get(new_var_num), put(new_var_num, N+1), - list_to_atom("@f"++integer_to_list(N)). + N. letify(Bs, Body) -> Ann = cerl:get_ann(Body), diff --git a/lib/compiler/src/v3_codegen.erl b/lib/compiler/src/v3_codegen.erl index a8f4926e55..8808c0a3b7 100644 --- a/lib/compiler/src/v3_codegen.erl +++ b/lib/compiler/src/v3_codegen.erl @@ -1162,7 +1162,7 @@ select_binary(#k_val_clause{val=#k_binary{segs=#k_var{name=V}},body=B, {Bis0,Aft,St1} = match_cg(B, Vf, Int0, St0#cg{ctx=V}), CtxReg = fetch_var(V, Int0), Live = max_reg(Bef#sr.reg), - Bis1 = [{test,bs_start_match2,{f,Tf},Live,[CtxReg,V],CtxReg}, + Bis1 = [{test,bs_start_match2,{f,Tf},Live,[CtxReg,{context,V}],CtxReg}, {bs_save2,CtxReg,{V,V}}|Bis0], Bis = finish_select_binary(Bis1), {Bis,Aft,St1#cg{ctx=OldCtx}}; @@ -1174,7 +1174,8 @@ select_binary(#k_val_clause{val=#k_binary{segs=#k_var{name=Ivar}},body=B, {Bis0,Aft,St1} = match_cg(B, Vf, Int0, St0#cg{ctx=Ivar}), CtxReg = fetch_var(Ivar, Int0), Live = max_reg(Bef#sr.reg), - Bis1 = [{test,bs_start_match2,{f,Tf},Live,[fetch_var(V, Bef),Ivar],CtxReg}, + Bis1 = [{test,bs_start_match2,{f,Tf},Live, + [fetch_var(V, Bef),{context,Ivar}],CtxReg}, {bs_save2,CtxReg,{Ivar,Ivar}}|Bis0], Bis = finish_select_binary(Bis1), {Bis,Aft,St1#cg{ctx=OldCtx}}. diff --git a/lib/compiler/src/v3_core.erl b/lib/compiler/src/v3_core.erl index 8cf8c69fef..4799105d05 100644 --- a/lib/compiler/src/v3_core.erl +++ b/lib/compiler/src/v3_core.erl @@ -2005,7 +2005,7 @@ new_fun_name(Type, #core{fcount=C}=St) -> %% new_var_name(State) -> {VarName,State}. new_var_name(#core{vcount=C}=St) -> - {list_to_atom("@c" ++ integer_to_list(C)),St#core{vcount=C + 1}}. + {C,St#core{vcount=C + 1}}. %% new_var(State) -> {{var,Name},State}. %% new_var(LineAnno, State) -> {{var,Name},State}. diff --git a/lib/compiler/src/v3_kernel.erl b/lib/compiler/src/v3_kernel.erl index dfe8d26afb..4e3ceedbc0 100644 --- a/lib/compiler/src/v3_kernel.erl +++ b/lib/compiler/src/v3_kernel.erl @@ -157,7 +157,13 @@ include_attribute(_) -> true. function({#c_var{name={F,Arity}=FA},Body}, St0) -> %%io:format("~w/~w~n", [F,Arity]), try - St1 = St0#kern{func=FA,ff=undefined,vcount=0,fcount=0,ds=cerl_sets:new()}, + %% Find a suitable starting value for the variable counter. Note + %% that this pass assumes that new_var_name/1 returns a variable + %% name distinct from any variable used in the entire body of + %% the function. We use integers as variable names to avoid + %% filling up the atom table when compiling huge functions. + Count = cerl_trees:next_free_variable_name(Body), + St1 = St0#kern{func=FA,ff=undefined,vcount=Count,fcount=0,ds=cerl_sets:new()}, {#ifun{anno=Ab,vars=Kvs,body=B0},[],St2} = expr(Body, new_sub(), St1), {B1,_,St3} = ubody(B0, return, St2), %%B1 = B0, St3 = St2, %Null second pass @@ -168,7 +174,6 @@ function({#c_var{name={F,Arity}=FA},Body}, St0) -> erlang:raise(Class, Error, Stack) end. - %% body(Cexpr, Sub, State) -> {Kexpr,[PreKepxr],State}. %% Do the main sequence of a body. A body ends in an atomic value or %% values. Must check if vector first so do expr. @@ -1356,7 +1361,7 @@ new_fun_name(Type, #kern{func={F,Arity},fcount=C}=St) -> %% new_var_name(State) -> {VarName,State}. new_var_name(#kern{vcount=C}=St) -> - {list_to_atom("@k" ++ integer_to_list(C)),St#kern{vcount=C+1}}. + {C,St#kern{vcount=C+1}}. %% new_var(State) -> {#k_var{},State}. diff --git a/lib/dialyzer/test/small_SUITE_data/results/fun_arity b/lib/dialyzer/test/small_SUITE_data/results/fun_arity index e916b2483f..8b7a538758 100644 --- a/lib/dialyzer/test/small_SUITE_data/results/fun_arity +++ b/lib/dialyzer/test/small_SUITE_data/results/fun_arity @@ -1,37 +1,37 @@ -fun_arity.erl:100: Fun application will fail since _@c1 :: fun(() -> any()) is not a function of arity 1 +fun_arity.erl:100: Fun application will fail since _1 :: fun(() -> any()) is not a function of arity 1 fun_arity.erl:100: Function 'Mfa_0_ko'/1 has no local return -fun_arity.erl:104: Fun application will fail since _@c1 :: fun((_) -> any()) is not a function of arity 0 +fun_arity.erl:104: Fun application will fail since _1 :: fun((_) -> any()) is not a function of arity 0 fun_arity.erl:104: Function 'Mfa_1_ko'/1 has no local return -fun_arity.erl:111: Fun application will fail since _@c1 :: fun(() -> any()) is not a function of arity 1 +fun_arity.erl:111: Fun application will fail since _1 :: fun(() -> any()) is not a function of arity 1 fun_arity.erl:111: Function mFa_0_ko/1 has no local return -fun_arity.erl:115: Fun application will fail since _@c1 :: fun((_) -> any()) is not a function of arity 0 +fun_arity.erl:115: Fun application will fail since _1 :: fun((_) -> any()) is not a function of arity 0 fun_arity.erl:115: Function mFa_1_ko/1 has no local return -fun_arity.erl:122: Fun application will fail since _@c2 :: fun(() -> any()) is not a function of arity 1 +fun_arity.erl:122: Fun application will fail since _2 :: fun(() -> any()) is not a function of arity 1 fun_arity.erl:122: Function 'MFa_0_ko'/2 has no local return -fun_arity.erl:126: Fun application will fail since _@c2 :: fun((_) -> any()) is not a function of arity 0 +fun_arity.erl:126: Fun application will fail since _2 :: fun((_) -> any()) is not a function of arity 0 fun_arity.erl:126: Function 'MFa_1_ko'/2 has no local return -fun_arity.erl:35: Fun application will fail since _@c0 :: fun(() -> 'ok') is not a function of arity 1 +fun_arity.erl:35: Fun application will fail since _0 :: fun(() -> 'ok') is not a function of arity 1 fun_arity.erl:35: Function f_0_ko/0 has no local return -fun_arity.erl:39: Fun application will fail since _@c0 :: fun((_) -> 'ok') is not a function of arity 0 +fun_arity.erl:39: Fun application will fail since _0 :: fun((_) -> 'ok') is not a function of arity 0 fun_arity.erl:39: Function f_1_ko/0 has no local return -fun_arity.erl:48: Fun application will fail since _@c0 :: fun(() -> 'ok') is not a function of arity 1 +fun_arity.erl:48: Fun application will fail since _0 :: fun(() -> 'ok') is not a function of arity 1 fun_arity.erl:48: Function fa_0_ko/0 has no local return -fun_arity.erl:53: Fun application will fail since _@c0 :: fun((_) -> 'ok') is not a function of arity 0 +fun_arity.erl:53: Fun application will fail since _0 :: fun((_) -> 'ok') is not a function of arity 0 fun_arity.erl:53: Function fa_1_ko/0 has no local return -fun_arity.erl:63: Fun application will fail since _@c0 :: fun(() -> any()) is not a function of arity 1 +fun_arity.erl:63: Fun application will fail since _0 :: fun(() -> any()) is not a function of arity 1 fun_arity.erl:63: Function mfa_0_ko/0 has no local return -fun_arity.erl:68: Fun application will fail since _@c0 :: fun((_) -> any()) is not a function of arity 0 +fun_arity.erl:68: Fun application will fail since _0 :: fun((_) -> any()) is not a function of arity 0 fun_arity.erl:68: Function mfa_1_ko/0 has no local return -fun_arity.erl:76: Fun application will fail since _@c0 :: fun(() -> any()) is not a function of arity 1 +fun_arity.erl:76: Fun application will fail since _0 :: fun(() -> any()) is not a function of arity 1 fun_arity.erl:76: Function mfa_ne_0_ko/0 has no local return fun_arity.erl:78: Function mf_ne/0 will never be called -fun_arity.erl:81: Fun application will fail since _@c0 :: fun((_) -> any()) is not a function of arity 0 +fun_arity.erl:81: Fun application will fail since _0 :: fun((_) -> any()) is not a function of arity 0 fun_arity.erl:81: Function mfa_ne_1_ko/0 has no local return fun_arity.erl:83: Function mf_ne/1 will never be called -fun_arity.erl:89: Fun application will fail since _@c0 :: fun(() -> any()) is not a function of arity 1 +fun_arity.erl:89: Fun application will fail since _0 :: fun(() -> any()) is not a function of arity 1 fun_arity.erl:89: Function mfa_nd_0_ko/0 has no local return fun_arity.erl:90: Call to missing or unexported function fun_arity:mf_nd/0 -fun_arity.erl:93: Fun application will fail since _@c0 :: fun((_) -> any()) is not a function of arity 0 +fun_arity.erl:93: Fun application will fail since _0 :: fun((_) -> any()) is not a function of arity 0 fun_arity.erl:93: Function mfa_nd_1_ko/0 has no local return fun_arity.erl:94: Call to missing or unexported function fun_arity:mf_nd/1 diff --git a/lib/kernel/src/file.erl b/lib/kernel/src/file.erl index c2df1ee288..57d8fc7a15 100644 --- a/lib/kernel/src/file.erl +++ b/lib/kernel/src/file.erl @@ -1,7 +1,7 @@ %% %% %CopyrightBegin% %% -%% Copyright Ericsson AB 1996-2017. All Rights Reserved. +%% Copyright Ericsson AB 1996-2018. All Rights Reserved. %% %% Licensed under the Apache License, Version 2.0 (the "License"); %% you may not use this file except in compliance with the License. @@ -101,14 +101,25 @@ -type deep_list() :: [char() | atom() | deep_list()]. -type name() :: string() | atom() | deep_list(). -type name_all() :: string() | atom() | deep_list() | (RawFilename :: binary()). --type posix() :: 'eacces' | 'eagain' | 'ebadf' | 'ebusy' | 'edquot' - | 'eexist' | 'efault' | 'efbig' | 'eintr' | 'einval' - | 'eio' | 'eisdir' | 'eloop' | 'emfile' | 'emlink' - | 'enametoolong' - | 'enfile' | 'enodev' | 'enoent' | 'enomem' | 'enospc' - | 'enotblk' | 'enotdir' | 'enotsup' | 'enxio' | 'eperm' - | 'epipe' | 'erofs' | 'espipe' | 'esrch' | 'estale' - | 'exdev'. +-type posix() :: + 'eacces' | 'eagain' | + 'ebadf' | 'ebadmsg' | 'ebusy' | + 'edeadlk' | 'edeadlock' | 'edquot' | + 'eexist' | + 'efault' | 'efbig' | 'eftype' | + 'eintr' | 'einval' | 'eio' | 'eisdir' | + 'eloop' | + 'emfile' | 'emlink' | 'emultihop' | + 'enametoolong' | 'enfile' | + 'enobufs' | 'enodev' | 'enolck' | 'enolink' | 'enoent' | + 'enomem' | 'enospc' | 'enosr' | 'enostr' | 'enosys' | + 'enotblk' | 'enotdir' | 'enotsup' | 'enxio' | + 'eopnotsupp' | 'eoverflow' | + 'eperm' | 'epipe' | + 'erange' | 'erofs' | + 'espipe' | 'esrch' | 'estale' | + 'etxtbsy' | + 'exdev'. -type date_time() :: calendar:datetime(). -type posix_file_advise() :: 'normal' | 'sequential' | 'random' | 'no_reuse' | 'will_need' | 'dont_need'. diff --git a/lib/kernel/src/inet.erl b/lib/kernel/src/inet.erl index 4bad523dff..73c53b9011 100644 --- a/lib/kernel/src/inet.erl +++ b/lib/kernel/src/inet.erl @@ -105,7 +105,20 @@ {local, binary()} | {unspec, <<>>} | {undefined, any()}. --type posix() :: exbadport | exbadseq | file:posix(). +-type posix() :: + 'eaddrinuse' | 'eaddrnotavail' | 'eafnosupport' | 'ealready' | + 'econnaborted' | 'econnrefused' | 'econnreset' | + 'edestaddrreq' | + 'ehostdown' | 'ehostunreach' | + 'einprogress' | 'eisconn' | + 'emsgsize' | + 'enetdown' | 'enetunreach' | + 'enopkg' | 'enoprotoopt' | 'enotconn' | 'enotty' | 'enotsock' | + 'eproto' | 'eprotonosupport' | 'eprototype' | + 'esocktnosupport' | + 'etimedout' | + 'ewouldblock' | + 'exbadport' | 'exbadseq' | file:posix(). -type socket() :: port(). -type socket_setopt() :: diff --git a/lib/runtime_tools/doc/src/dbg.xml b/lib/runtime_tools/doc/src/dbg.xml index 95f74d4607..276a41c415 100644 --- a/lib/runtime_tools/doc/src/dbg.xml +++ b/lib/runtime_tools/doc/src/dbg.xml @@ -815,7 +815,7 @@ Error: fun containing local erlang function calls ('is_atomm' called in guard)\ <v>HandlerSpec = {HandlerFun, InitialData}</v> <v>HandlerFun = fun() (two arguments)</v> <v>ModuleSpec = fun() (no arguments) | {TracerModule, TracerState}</v> - <v>ModuleModule = atom()</v> + <v>TracerModule = atom()</v> <v>InitialData = TracerState = term()</v> </type> <desc> diff --git a/lib/ssh/doc/src/ssh.xml b/lib/ssh/doc/src/ssh.xml index acf94ff6af..d36be8431c 100644 --- a/lib/ssh/doc/src/ssh.xml +++ b/lib/ssh/doc/src/ssh.xml @@ -67,24 +67,41 @@ <taglist> <tag><c>boolean() =</c></tag> <item><p><c>true | false</c></p></item> + <tag><c>string() =</c></tag> <item><p><c>[byte()]</c></p></item> + <tag><c>ssh_daemon_ref() =</c></tag> <item><p>opaque() - as returned by <c>ssh:daemon/[1,2,3]</c></p></item> + + <tag><c>ok_error(OKtype) = </c></tag> + <item><p><c>{ok,OKtype} | {error, term()}</c></p></item> + + <tag><c>ok_error() = </c></tag> + <item><p><c>ok_error(term())</c></p></item> + <tag><c>ssh_connection_ref() =</c></tag> <item><p>opaque() - as returned by <c>ssh:connect/3</c></p></item> + <tag><c>ip_address() =</c></tag> - <item><p><c>inet::ip_address</c></p></item> + <item><p><c>inet::ip_address()</c></p></item> + + <tag><c>port_number() =</c></tag> + <item><p><c>inet::port_number()</c></p></item> + <tag><c>subsystem_spec() =</c></tag> <item><p><c>{subsystem_name(), {channel_callback(), channel_init_args()}}</c></p></item> + <tag><c>subsystem_name() =</c></tag> <item><p><c>string()</c></p></item> + <tag><c>channel_callback() =</c></tag> <item><p><c>atom()</c> - Name of the Erlang module implementing the subsystem using the <c>ssh_channel</c> behavior, see <seealso marker="ssh_channel">ssh_channel(3)</seealso></p></item> + <tag><c>key_cb() =</c></tag> <item> <p><c>atom() | {atom(), list()}</c></p> @@ -94,6 +111,7 @@ case maybe.</p> <p><c>list()</c> - List of options that can be passed to the callback module.</p> </item> + <tag><c>channel_init_args() =</c></tag> <item><p><c>list()</c></p></item> @@ -478,8 +496,8 @@ <v>Option = client_version | server_version | user | peer | sockname </v> <v>Value = [option_value()] </v> <v>option_value() = {{Major::integer(), Minor::integer()}, VersionString::string()} | - User::string() | Peer::{inet:hostname(), {inet::ip_adress(), inet::port_number()}} | - Sockname::{inet::ip_adress(), inet::port_number()}</v> + User::string() | Peer::{inet:hostname(), {ip_address(), port_number()}} | + Sockname::{ip_address(), port_number()}</v> </type> <desc> <p>Retrieves information about a connection.</p> @@ -541,22 +559,83 @@ The option can be set to the empty list if you do not want the daemon to run any subsystems.</p> </item> - <tag><c><![CDATA[{shell, {Module, Function, Args} | + + <tag><marker id="daemon_opt_shell"/> + <c><![CDATA[{shell, {Module, Function, Args} | fun(string() = User) - > pid() | fun(string() = User, ip_address() = PeerAddr) -> pid()}]]></c></tag> <item> <p>Defines the read-eval-print loop used when a shell is requested by the client. The default is to use the Erlang shell: <c><![CDATA[{shell, start, []}]]></c></p> + <p>See the option <seealso marker="#daemon_opt_exec"><c>exec</c></seealso> + for a description of how the daemon execute exec-requests depending on + the shell- and exec-options.</p> + </item> + + <tag><marker id="daemon_opt_exec"/> + <c><![CDATA[{exec, {direct, exec_spec()}}]]></c> + <br/><c>where:</c> + <br/><c>exec_spec() = </c> + <br/><c> fun(Cmd::string()) -> ok_error()</c> + <br/><c> | fun(Cmd::string(), User::string()) -> ok_error()</c> + <br/><c> | fun(Cmd::string(), User::string(), ClientAddr::{ip_address(), port_number()}) -> ok_error()</c> + </tag> + <item> + <p>This option changes how the daemon execute exec-requests from clients. The term in <c>ok_error()</c> + is formatted to a string if it is a non-string type. No trailing newline is added in the ok-case but in the + error case.</p> + <p>Error texts are returned on channel-type 1 which usually are piped to <c>stderr</c> on e.g Linux systems. + Texts from a successful execution will in similar manner be piped to <c>stdout</c>. The exit-status code + is set to 0 for success and -1 for errors. The exact results presented on the client side depends on the + client. + </p> + <p>The option cooperates with the daemon-option <seealso marker="#daemon_opt_shell"><c>shell</c></seealso> + in the following way:</p> + <taglist> + <tag>1. If the exec-option is present (the shell-option may or may not be present):</tag> + <item> + <p>The exec-option fun is called with the same number of parameters as the arity of the fun, + and the result is returned to the client. + </p> + </item> + + <tag>2. If the exec-option is absent, but a shell-option is present with the default Erlang shell:</tag> + <item> + <p>The default Erlang evaluator is used and the result is returned to the client.</p> + </item> + + <tag>3. If the exec-option is absent, but a shell-option is present that is not the default Erlang shell:</tag> + <item> + <p>The exec-request is not evaluated and an error message is returned to the client.</p> + </item> + + <tag>4. If neither the exec-option nor the shell-option is present:</tag> + <item> + <p>The default Erlang evaluator is used and the result is returned to the client.</p> + </item> + </taglist> + <p>If a custom CLI is installed (see the option <seealso marker="#daemon_opt_ssh_cli"><c>ssh_cli</c></seealso>) + the rules above are replaced by thoose implied by the custom CLI. + </p> + <note> + <p>The exec-option has existed for a long time but has not previously been documented. The old + definition and behaviour are retained but obey the rules 1-4 above if conflicting. + The old and undocumented style should not be used in new programs.</p> + </note> </item> - <tag><c><![CDATA[{ssh_cli, {channel_callback(), + + <tag><marker id="daemon_opt_ssh_cli"/> + <c><![CDATA[{ssh_cli, {channel_callback(), channel_init_args()} | no_cli}]]></c></tag> <item> <p>Provides your own CLI implementation, that is, a channel callback module that implements a shell and command execution. The shell read-eval-print loop can be customized, using the - option <c>shell</c>. This means less work than implementing - an own CLI channel. If set to <c>no_cli</c>, the CLI channels + option <seealso marker="#daemon_opt_shell"><c>shell</c></seealso>. This means less work than implementing + an own CLI channel. If <c>ssh_cli</c> is set to <c>no_cli</c>, the CLI channels + like <seealso marker="#daemon_opt_shell"><c>shell</c></seealso> + and <seealso marker="#daemon_opt_exec"><c>exec</c></seealso> are disabled and only subsystem channels are allowed.</p> </item> <tag><c><![CDATA[{user_dir, string()}]]></c></tag> diff --git a/lib/ssh/doc/src/ssh_connection.xml b/lib/ssh/doc/src/ssh_connection.xml index 150d46a9a2..72830de04d 100644 --- a/lib/ssh/doc/src/ssh_connection.xml +++ b/lib/ssh/doc/src/ssh_connection.xml @@ -428,7 +428,7 @@ </func> <func> - <name>shell(ConnectionRef, ChannelId) -> ssh_request_status() | {error, closed} + <name>shell(ConnectionRef, ChannelId) -> ok | failure | {error, closed} </name> <fsummary>Requests that the user default shell (typically defined in /etc/passwd in Unix systems) is to be executed at the server end.</fsummary> @@ -440,6 +440,10 @@ <p>Is to be called by a client channel process to request that the user default shell (typically defined in /etc/passwd in Unix systems) is executed at the server end.</p> + <p>Note: the return value is <c>ok</c> instead of <c>success</c> unlike in other + functions in this module. This is a fault that was introduced so long ago that + any change would break a large number of existing software. + </p> </desc> </func> diff --git a/lib/ssh/src/ssh_cli.erl b/lib/ssh/src/ssh_cli.erl index 958c342f5f..783f2f80c0 100644 --- a/lib/ssh/src/ssh_cli.erl +++ b/lib/ssh/src/ssh_cli.erl @@ -118,42 +118,53 @@ handle_ssh_msg({ssh_cm, ConnectionHandler, write_chars(ConnectionHandler, ChannelId, Chars), {ok, State#state{pty = Pty, buf = NewBuf}}; -handle_ssh_msg({ssh_cm, ConnectionHandler, - {shell, ChannelId, WantReply}}, State) -> +handle_ssh_msg({ssh_cm, ConnectionHandler, {shell, ChannelId, WantReply}}, State) -> NewState = start_shell(ConnectionHandler, State), - ssh_connection:reply_request(ConnectionHandler, WantReply, - success, ChannelId), - {ok, NewState#state{channel = ChannelId, - cm = ConnectionHandler}}; - -handle_ssh_msg({ssh_cm, ConnectionHandler, - {exec, ChannelId, WantReply, Cmd}}, #state{exec=undefined, - shell=?DEFAULT_SHELL} = State) -> - {Reply, Status} = exec(Cmd), - write_chars(ConnectionHandler, - ChannelId, io_lib:format("~p\n", [Reply])), - ssh_connection:reply_request(ConnectionHandler, WantReply, - success, ChannelId), - ssh_connection:exit_status(ConnectionHandler, ChannelId, Status), - ssh_connection:send_eof(ConnectionHandler, ChannelId), - {stop, ChannelId, State#state{channel = ChannelId, cm = ConnectionHandler}}; - -handle_ssh_msg({ssh_cm, ConnectionHandler, - {exec, ChannelId, WantReply, _Cmd}}, #state{exec = undefined} = State) -> - write_chars(ConnectionHandler, ChannelId, 1, "Prohibited.\n"), ssh_connection:reply_request(ConnectionHandler, WantReply, success, ChannelId), - ssh_connection:exit_status(ConnectionHandler, ChannelId, 255), - ssh_connection:send_eof(ConnectionHandler, ChannelId), - {stop, ChannelId, State#state{channel = ChannelId, cm = ConnectionHandler}}; - -handle_ssh_msg({ssh_cm, ConnectionHandler, - {exec, ChannelId, WantReply, Cmd}}, State) -> - NewState = start_shell(ConnectionHandler, Cmd, State), - ssh_connection:reply_request(ConnectionHandler, WantReply, - success, ChannelId), {ok, NewState#state{channel = ChannelId, cm = ConnectionHandler}}; +handle_ssh_msg({ssh_cm, ConnectionHandler, {exec, ChannelId, WantReply, Cmd}}, S0) -> + case + case S0#state.exec of + {direct,F} -> + %% Exec called and a Fun or MFA is defined to use. The F returns the + %% value to return. + exec_direct(ConnectionHandler, F, Cmd); + + undefined when S0#state.shell == ?DEFAULT_SHELL -> + %% Exec called and the shell is the default shell (= Erlang shell). + %% To be exact, eval the term as an Erlang term (but not using the + %% ?DEFAULT_SHELL directly). This disables banner, prompts and such. + exec_in_erlang_default_shell(Cmd); + + undefined -> + %% Exec called, but the a shell other than the default shell is defined. + %% No new exec shell is defined, so don't execute! + %% We don't know if it is intended to use the new shell or not. + {"Prohibited.", 255, 1}; + + _ -> + %% Exec called and a Fun or MFA is defined to use. The F communicates via + %% standard io:write/read. + %% Kept for compatibility. + S1 = start_exec_shell(ConnectionHandler, Cmd, S0), + ssh_connection:reply_request(ConnectionHandler, WantReply, success, ChannelId), + {ok, S1} + end + of + {Reply, Status, Type} -> + write_chars(ConnectionHandler, ChannelId, Type, Reply), + ssh_connection:reply_request(ConnectionHandler, WantReply, success, ChannelId), + ssh_connection:exit_status(ConnectionHandler, ChannelId, Status), + ssh_connection:send_eof(ConnectionHandler, ChannelId), + {stop, ChannelId, S0#state{channel = ChannelId, cm = ConnectionHandler}}; + + {ok, S} -> + {ok, S#state{channel = ChannelId, + cm = ConnectionHandler}} + end; + handle_ssh_msg({ssh_cm, _ConnectionHandler, {eof, _ChannelId}}, State) -> {ok, State}; @@ -259,35 +270,7 @@ to_group(Data, Group) -> end, to_group(Tail, Group). -exec(Cmd) -> - case eval(parse(scan(Cmd))) of - {error, _} -> - {Cmd, 0}; %% This should be an external call - Term -> - Term - end. - -scan(Cmd) -> - erl_scan:string(Cmd). - -parse({ok, Tokens, _}) -> - erl_parse:parse_exprs(Tokens); -parse(Error) -> - Error. - -eval({ok, Expr_list}) -> - case (catch erl_eval:exprs(Expr_list, - erl_eval:new_bindings())) of - {value, Value, _NewBindings} -> - {Value, 0}; - {'EXIT', {Error, _}} -> - {Error, -1}; - Error -> - {Error, -1} - end; -eval(Error) -> - {Error, -1}. - +%%-------------------------------------------------------------------- %%% io_request, handle io requests from the user process, %%% Note, this is not the real I/O-protocol, but the mockup version %%% used between edlin and a user_driver. The protocol tags are @@ -506,53 +489,130 @@ bin_to_list(L) when is_list(L) -> bin_to_list(I) when is_integer(I) -> I. + +%%-------------------------------------------------------------------- start_shell(ConnectionHandler, State) -> - Shell = State#state.shell, - ConnectionInfo = ssh_connection_handler:connection_info(ConnectionHandler, - [peer, user]), - ShellFun = case is_function(Shell) of - true -> - User = proplists:get_value(user, ConnectionInfo), - case erlang:fun_info(Shell, arity) of - {arity, 1} -> - fun() -> Shell(User) end; - {arity, 2} -> - {_, PeerAddr} = proplists:get_value(peer, ConnectionInfo), - fun() -> Shell(User, PeerAddr) end; - _ -> - Shell - end; - _ -> - Shell - end, - Echo = get_echo(State#state.pty), - Group = group:start(self(), ShellFun, [{echo, Echo}]), - State#state{group = Group, buf = empty_buf()}. - -start_shell(_ConnectionHandler, Cmd, #state{exec={M, F, A}} = State) -> - Group = group:start(self(), {M, F, A++[Cmd]}, [{echo, false}]), - State#state{group = Group, buf = empty_buf()}; -start_shell(ConnectionHandler, Cmd, #state{exec=Shell} = State) when is_function(Shell) -> - - ConnectionInfo = ssh_connection_handler:connection_info(ConnectionHandler, - [peer, user]), - User = proplists:get_value(user, ConnectionInfo), - ShellFun = - case erlang:fun_info(Shell, arity) of - {arity, 1} -> - fun() -> Shell(Cmd) end; - {arity, 2} -> - fun() -> Shell(Cmd, User) end; - {arity, 3} -> - {_, PeerAddr} = proplists:get_value(peer, ConnectionInfo), - fun() -> Shell(Cmd, User, PeerAddr) end; - _ -> - Shell - end, - Echo = get_echo(State#state.pty), - Group = group:start(self(), ShellFun, [{echo,Echo}]), - State#state{group = Group, buf = empty_buf()}. + ShellSpawner = + case State#state.shell of + Shell when is_function(Shell, 1) -> + [{user,User}] = ssh_connection_handler:connection_info(ConnectionHandler, [user]), + fun() -> Shell(User) end; + Shell when is_function(Shell, 2) -> + ConnectionInfo = + ssh_connection_handler:connection_info(ConnectionHandler, [peer, user]), + User = proplists:get_value(user, ConnectionInfo), + {_, PeerAddr} = proplists:get_value(peer, ConnectionInfo), + fun() -> Shell(User, PeerAddr) end; + {_,_,_} = Shell -> + Shell + end, + State#state{group = group:start(self(), ShellSpawner, [{echo, get_echo(State#state.pty)}]), + buf = empty_buf()}. + +%%-------------------------------------------------------------------- +start_exec_shell(ConnectionHandler, Cmd, State) -> + ExecShellSpawner = + case State#state.exec of + ExecShell when is_function(ExecShell, 1) -> + fun() -> ExecShell(Cmd) end; + ExecShell when is_function(ExecShell, 2) -> + [{user,User}] = ssh_connection_handler:connection_info(ConnectionHandler, [user]), + fun() -> ExecShell(Cmd, User) end; + ExecShell when is_function(ExecShell, 3) -> + ConnectionInfo = + ssh_connection_handler:connection_info(ConnectionHandler, [peer, user]), + User = proplists:get_value(user, ConnectionInfo), + {_, PeerAddr} = proplists:get_value(peer, ConnectionInfo), + fun() -> ExecShell(Cmd, User, PeerAddr) end; + {M,F,A} -> + {M, F, A++[Cmd]} + end, + State#state{group = group:start(self(), ExecShellSpawner, [{echo,false}]), + buf = empty_buf()}. + +%%-------------------------------------------------------------------- +exec_in_erlang_default_shell(Cmd) -> + case eval(parse(scan(Cmd))) of + {ok, Term} -> + {io_lib:format("~p\n", [Term]), 0, 0}; + {error, Error} when is_atom(Error) -> + {io_lib:format("Error in ~p: ~p\n", [Cmd,Error]), -1, 1}; + _ -> + {io_lib:format("Error: ~p\n", [Cmd]), -1, 1} + end. + +scan(Cmd) -> + erl_scan:string(Cmd). + +parse({ok, Tokens, _}) -> + erl_parse:parse_exprs(Tokens); +parse(Error) -> + Error. +eval({ok, Expr_list}) -> + case (catch erl_eval:exprs(Expr_list, + erl_eval:new_bindings())) of + {value, Value, _NewBindings} -> + {ok, Value}; + {'EXIT', {Error, _}} -> + {error, Error}; + {error, Error} -> + {error, Error}; + Error -> + {error, Error} + end; +eval({error,Error}) -> + {error, Error}; +eval(Error) -> + {error, Error}. + +%%-------------------------------------------------------------------- +exec_direct(ConnectionHandler, ExecSpec, Cmd) -> + try + case ExecSpec of + _ when is_function(ExecSpec, 1) -> + ExecSpec(Cmd); + _ when is_function(ExecSpec, 2) -> + [{user,User}] = ssh_connection_handler:connection_info(ConnectionHandler, [user]), + ExecSpec(Cmd, User); + _ when is_function(ExecSpec, 3) -> + ConnectionInfo = + ssh_connection_handler:connection_info(ConnectionHandler, [peer, user]), + User = proplists:get_value(user, ConnectionInfo), + {_, PeerAddr} = proplists:get_value(peer, ConnectionInfo), + ExecSpec(Cmd, User, PeerAddr) + end + of + Reply -> + return_direct_exec_reply(Reply, Cmd) + catch + C:Error -> + {io_lib:format("Error in \"~s\": ~p ~p~n", [Cmd,C,Error]), -1, 1} + end. + + + +return_direct_exec_reply(Reply, Cmd) -> + case fmt_exec_repl(Reply) of + {ok,S} -> + {S, 0, 0}; + {error,S} -> + {io_lib:format("Error in \"~s\": ~s~n", [Cmd,S]), -1, 1} + end. + +fmt_exec_repl({T,A}) when T==ok ; T==error -> + try + {T, io_lib:format("~s",[A])} + catch + error:badarg -> + {T, io_lib:format("~p", [A])}; + C:Err -> + {error, io_lib:format("~p:~p~n",[C,Err])} + end; +fmt_exec_repl(Other) -> + {error, io_lib:format("Bad exec-plugin return: ~p",[Other])}. + +%%-------------------------------------------------------------------- % Pty can be undefined if the client never sets any pty options before % starting the shell. get_echo(undefined) -> diff --git a/lib/ssh/src/ssh_options.erl b/lib/ssh/src/ssh_options.erl index 1e10f72956..c05293d1ae 100644 --- a/lib/ssh/src/ssh_options.erl +++ b/lib/ssh/src/ssh_options.erl @@ -275,10 +275,12 @@ default(server) -> class => user_options }, - {exec, def} => % FIXME: need some archeology.... + {exec, def} => #{default => undefined, - chk => fun({M,F,_}) -> is_atom(M) andalso is_atom(F); - (V) -> is_function(V) + chk => fun({direct, V}) -> check_function1(V) orelse check_function2(V) orelse check_function3(V); + %% Compatibility (undocumented): + ({M,F,A}) -> is_atom(M) andalso is_atom(F) andalso is_list(A); + (V) -> check_function1(V) orelse check_function2(V) orelse check_function3(V) end, class => user_options }, diff --git a/lib/ssh/test/ssh_connection_SUITE.erl b/lib/ssh/test/ssh_connection_SUITE.erl index 9587c0c251..257f2f70d7 100644 --- a/lib/ssh/test/ssh_connection_SUITE.erl +++ b/lib/ssh/test/ssh_connection_SUITE.erl @@ -50,6 +50,13 @@ all() -> start_shell, start_shell_exec, start_shell_exec_fun, + start_shell_exec_fun2, + start_shell_exec_fun3, + start_shell_exec_direct_fun, + start_shell_exec_direct_fun2, + start_shell_exec_direct_fun3, + start_shell_exec_direct_fun1_error, + start_shell_exec_direct_fun1_error_type, start_shell_sock_exec_fun, start_shell_sock_daemon_exec, connect_sock_not_tcp, @@ -522,7 +529,7 @@ start_shell_exec(Config) when is_list(Config) -> {Pid, Host, Port} = ssh_test_lib:daemon([{system_dir, SysDir}, {user_dir, UserDir}, {password, "morot"}, - {exec, {?MODULE,ssh_exec,[]}} ]), + {exec, {?MODULE,ssh_exec_echo,[]}} ]), ConnectionRef = ssh_test_lib:connect(Host, Port, [{silently_accept_hosts, true}, {user, "foo"}, @@ -535,7 +542,7 @@ start_shell_exec(Config) when is_list(Config) -> success = ssh_connection:exec(ConnectionRef, ChannelId0, "testing", infinity), receive - {ssh_cm, ConnectionRef, {data, _ChannelId, 0, <<"testing\r\n">>}} -> + {ssh_cm, ConnectionRef, {data, _ChannelId, 0, <<"echo testing\r\n">>}} -> ok after 5000 -> ct:fail("Exec Timeout") @@ -618,10 +625,49 @@ exec_erlang_term_non_default_shell(Config) when is_list(Config) -> TestResult. %%-------------------------------------------------------------------- -start_shell_exec_fun() -> - [{doc, "start shell to exec command"}]. +start_shell_exec_fun(Config) -> + do_start_shell_exec_fun(fun ssh_exec_echo/1, + "testing", <<"echo testing\r\n">>, 0, + Config). + +start_shell_exec_fun2(Config) -> + do_start_shell_exec_fun(fun ssh_exec_echo/2, + "testing", <<"echo foo testing\r\n">>, 0, + Config). + +start_shell_exec_fun3(Config) -> + do_start_shell_exec_fun(fun ssh_exec_echo/3, + "testing", <<"echo foo testing\r\n">>, 0, + Config). + +start_shell_exec_direct_fun(Config) -> + do_start_shell_exec_fun({direct, fun ssh_exec_direct_echo/1}, + "testing", <<"echo testing\n">>, 0, + Config). + +start_shell_exec_direct_fun2(Config) -> + do_start_shell_exec_fun({direct, fun ssh_exec_direct_echo/2}, + "testing", <<"echo foo testing">>, 0, + Config). + +start_shell_exec_direct_fun3(Config) -> + do_start_shell_exec_fun({direct, fun ssh_exec_direct_echo/3}, + "testing", <<"echo foo testing">>, 0, + Config). + +start_shell_exec_direct_fun1_error(Config) -> + do_start_shell_exec_fun({direct, fun ssh_exec_direct_echo_error_return/1}, + "testing", <<"Error in \"testing\": {bad}\n">>, 1, + Config). + +start_shell_exec_direct_fun1_error_type(Config) -> + do_start_shell_exec_fun({direct, fun ssh_exec_direct_echo_error_return_type/1}, + "testing", <<"Error in \"testing\": Bad exec-plugin return: very_bad\n">>, 1, + Config). + + -start_shell_exec_fun(Config) when is_list(Config) -> +do_start_shell_exec_fun(Fun, Command, Expect, ExpectType, Config) -> PrivDir = proplists:get_value(priv_dir, Config), UserDir = filename:join(PrivDir, nopubkey), % to make sure we don't use public-key-auth file:make_dir(UserDir), @@ -629,7 +675,7 @@ start_shell_exec_fun(Config) when is_list(Config) -> {Pid, Host, Port} = ssh_test_lib:daemon([{system_dir, SysDir}, {user_dir, UserDir}, {password, "morot"}, - {exec, fun ssh_exec/1}]), + {exec, Fun}]), ConnectionRef = ssh_test_lib:connect(Host, Port, [{silently_accept_hosts, true}, {user, "foo"}, @@ -639,14 +685,19 @@ start_shell_exec_fun(Config) when is_list(Config) -> {ok, ChannelId0} = ssh_connection:session_channel(ConnectionRef, infinity), - success = ssh_connection:exec(ConnectionRef, ChannelId0, - "testing", infinity), + success = ssh_connection:exec(ConnectionRef, ChannelId0, Command, infinity), receive - {ssh_cm, ConnectionRef, {data, _ChannelId, 0, <<"testing\r\n">>}} -> + {ssh_cm, ConnectionRef, {data, _ChannelId, ExpectType, Expect}} -> ok after 5000 -> - ct:fail("Exec Timeout") + receive + Other -> + ct:pal("Received other:~n~p",[Other]), + ct:fail("Unexpected response") + after 0 -> + ct:fail("Exec Timeout") + end end, ssh:close(ConnectionRef), @@ -664,7 +715,7 @@ start_shell_sock_exec_fun(Config) when is_list(Config) -> {Pid, HostD, Port} = ssh_test_lib:daemon([{system_dir, SysDir}, {user_dir, UserDir}, {password, "morot"}, - {exec, fun ssh_exec/1}]), + {exec, fun ssh_exec_echo/1}]), Host = ssh_test_lib:ntoa(ssh_test_lib:mangle_connect_address(HostD)), {ok, Sock} = ssh_test_lib:gen_tcp_connect(Host, Port, [{active,false}]), @@ -680,7 +731,7 @@ start_shell_sock_exec_fun(Config) when is_list(Config) -> "testing", infinity), receive - {ssh_cm, ConnectionRef, {data, _ChannelId, 0, <<"testing\r\n">>}} -> + {ssh_cm, ConnectionRef, {data, _ChannelId, 0, <<"echo testing\r\n">>}} -> ok after 5000 -> ct:fail("Exec Timeout") @@ -704,7 +755,7 @@ start_shell_sock_daemon_exec(Config) -> {ok, _Pid} = ssh:daemon(Ss, [{system_dir, SysDir}, {user_dir, UserDir}, {password, "morot"}, - {exec, fun ssh_exec/1}]) + {exec, fun ssh_exec_echo/1}]) end), {ok,Sc} = gen_tcp:accept(Sl), {ok,ConnectionRef} = ssh:connect(Sc, [{silently_accept_hosts, true}, @@ -719,7 +770,7 @@ start_shell_sock_daemon_exec(Config) -> "testing", infinity), receive - {ssh_cm, ConnectionRef, {data, _ChannelId, 0, <<"testing\r\n">>}} -> + {ssh_cm, ConnectionRef, {data, _ChannelId, 0, <<"echo testing\r\n">>}} -> ok after 5000 -> ct:fail("Exec Timeout") @@ -830,7 +881,7 @@ stop_listener(Config) when is_list(Config) -> {Pid0, Host, Port} = ssh_test_lib:daemon([{system_dir, SysDir}, {user_dir, UserDir}, {password, "morot"}, - {exec, fun ssh_exec/1}]), + {exec, fun ssh_exec_echo/1}]), ConnectionRef0 = ssh_test_lib:connect(Host, Port, [{silently_accept_hosts, true}, {user, "foo"}, @@ -850,7 +901,7 @@ stop_listener(Config) when is_list(Config) -> success = ssh_connection:exec(ConnectionRef0, ChannelId0, "testing", infinity), receive - {ssh_cm, ConnectionRef0, {data, ChannelId0, 0, <<"testing\r\n">>}} -> + {ssh_cm, ConnectionRef0, {data, ChannelId0, 0, <<"echo testing\r\n">>}} -> ok after 5000 -> ct:fail("Exec Timeout") @@ -859,7 +910,7 @@ stop_listener(Config) when is_list(Config) -> case ssh_test_lib:daemon(Port, [{system_dir, SysDir}, {user_dir, UserDir}, {password, "potatis"}, - {exec, fun ssh_exec/1}]) of + {exec, fun ssh_exec_echo/1}]) of {Pid1, Host, Port} -> ConnectionRef1 = ssh_test_lib:connect(Host, Port, [{silently_accept_hosts, true}, {user, "foo"}, @@ -1070,7 +1121,22 @@ start_our_shell(_User, _Peer) -> %% Don't actually loop, just exit end). -ssh_exec(Cmd) -> + +ssh_exec_echo(Cmd) -> spawn(fun() -> - io:format(Cmd ++ "\n") + io:format("echo "++Cmd ++ "\n") end). + +ssh_exec_echo(Cmd, User) -> + spawn(fun() -> + io:format(io_lib:format("echo ~s ~s\n",[User,Cmd])) + end). +ssh_exec_echo(Cmd, User, _PeerAddr) -> + ssh_exec_echo(Cmd,User). + +ssh_exec_direct_echo(Cmd) -> {ok, io_lib:format("echo ~s~n",[Cmd])}. +ssh_exec_direct_echo(Cmd, User) -> {ok, io_lib:format("echo ~s ~s",[User,Cmd])}. +ssh_exec_direct_echo(Cmd, User, _PeerAddr) -> ssh_exec_direct_echo(Cmd,User). + +ssh_exec_direct_echo_error_return(_Cmd) -> {error, {bad}}. +ssh_exec_direct_echo_error_return_type(_Cmd) -> very_bad. diff --git a/lib/stdlib/doc/src/gb_sets.xml b/lib/stdlib/doc/src/gb_sets.xml index 7bfe477a11..2a3785dc27 100644 --- a/lib/stdlib/doc/src/gb_sets.xml +++ b/lib/stdlib/doc/src/gb_sets.xml @@ -83,6 +83,8 @@ </item> <item><seealso marker="#is_element/2"><c>is_element/2</c></seealso> </item> + <item><seealso marker="#is_empty/1"><c>is_empty/1</c></seealso> + </item> <item><seealso marker="#is_set/1"><c>is_set/1</c></seealso> </item> <item><seealso marker="#is_subset/2"><c>is_subset/2</c></seealso> diff --git a/lib/stdlib/doc/src/ordsets.xml b/lib/stdlib/doc/src/ordsets.xml index 7b590932e4..2d891d7a5a 100644 --- a/lib/stdlib/doc/src/ordsets.xml +++ b/lib/stdlib/doc/src/ordsets.xml @@ -142,6 +142,15 @@ </func> <func> + <name name="is_empty" arity="1"/> + <fsummary>Test for empty set.</fsummary> + <desc> + <p>Returns <c>true</c> if <c><anno>Ordset</anno></c> is an empty set, + otherwise <c>false</c>.</p> + </desc> + </func> + + <func> <name name="is_set" arity="1"/> <fsummary>Test for an <c>Ordset</c>.</fsummary> <desc> diff --git a/lib/stdlib/doc/src/sets.xml b/lib/stdlib/doc/src/sets.xml index 4934bed365..1ed96ddc3f 100644 --- a/lib/stdlib/doc/src/sets.xml +++ b/lib/stdlib/doc/src/sets.xml @@ -140,6 +140,15 @@ </func> <func> + <name name="is_empty" arity="1"/> + <fsummary>Test for empty set.</fsummary> + <desc> + <p>Returns <c>true</c> if <c><anno>Set</anno></c> is an empty set, + otherwise <c>false</c>.</p> + </desc> + </func> + + <func> <name name="is_set" arity="1"/> <fsummary>Test for a <c>Set</c>.</fsummary> <desc> diff --git a/lib/stdlib/src/erl_posix_msg.erl b/lib/stdlib/src/erl_posix_msg.erl index bfafca1ff7..8959fea498 100644 --- a/lib/stdlib/src/erl_posix_msg.erl +++ b/lib/stdlib/src/erl_posix_msg.erl @@ -1,7 +1,7 @@ %% %% %CopyrightBegin% %% -%% Copyright Ericsson AB 1997-2016. All Rights Reserved. +%% Copyright Ericsson AB 1997-2018. All Rights Reserved. %% %% Licensed under the Apache License, Version 2.0 (the "License"); %% you may not use this file except in compliance with the License. @@ -64,6 +64,7 @@ message_1(eduppkg) -> <<"duplicate package name">>; message_1(eexist) -> <<"file already exists">>; message_1(efault) -> <<"bad address in system call argument">>; message_1(efbig) -> <<"file too large">>; +message_1(eftype) -> <<"EFTYPE">>; message_1(ehostdown) -> <<"host is down">>; message_1(ehostunreach) -> <<"host is unreachable">>; message_1(eidrm) -> <<"identifier removed">>; @@ -115,6 +116,7 @@ message_1(enopkg) -> <<"package not installed">>; message_1(enoprotoopt) -> <<"bad proocol option">>; message_1(enospc) -> <<"no space left on device">>; message_1(enosr) -> <<"out of stream resources or not a stream device">>; +message_1(enostr) -> <<"not a stream">>; message_1(enosym) -> <<"unresolved symbol name">>; message_1(enosys) -> <<"function not implemented">>; message_1(enotblk) -> <<"block device required">>; @@ -128,6 +130,7 @@ message_1(enotty) -> <<"inappropriate device for ioctl">>; message_1(enotuniq) -> <<"name not unique on network">>; message_1(enxio) -> <<"no such device or address">>; message_1(eopnotsupp) -> <<"operation not supported on socket">>; +message_1(eoverflow) -> <<"offset too large for file system">>; message_1(eperm) -> <<"not owner">>; message_1(epfnosupport) -> <<"protocol family not supported">>; message_1(epipe) -> <<"broken pipe">>; @@ -167,4 +170,6 @@ message_1(ewouldblock) -> <<"operation would block">>; message_1(exdev) -> <<"cross-domain link">>; message_1(exfull) -> <<"message tables full">>; message_1(nxdomain) -> <<"non-existing domain">>; +message_1(exbadport) -> <<"inet_drv bad port state">>; +message_1(exbadseq) -> <<"inet_drv bad request sequence">>; message_1(_) -> <<"unknown POSIX error">>. diff --git a/lib/stdlib/src/ordsets.erl b/lib/stdlib/src/ordsets.erl index 569407f5ef..939e147ad8 100644 --- a/lib/stdlib/src/ordsets.erl +++ b/lib/stdlib/src/ordsets.erl @@ -19,7 +19,7 @@ -module(ordsets). --export([new/0,is_set/1,size/1,to_list/1,from_list/1]). +-export([new/0,is_set/1,size/1,is_empty/1,to_list/1,from_list/1]). -export([is_element/2,add_element/2,del_element/2]). -export([union/2,union/1,intersection/2,intersection/1]). -export([is_disjoint/2]). @@ -60,6 +60,13 @@ is_set([], _) -> true. size(S) -> length(S). +%% is_empty(OrdSet) -> boolean(). +%% Return 'true' if OrdSet is an empty set, otherwise 'false'. +-spec is_empty(Ordset) -> boolean() when + Ordset :: ordset(_). + +is_empty(S) -> S=:=[]. + %% to_list(OrdSet) -> [Elem]. %% Return the elements in OrdSet as a list. diff --git a/lib/stdlib/src/sets.erl b/lib/stdlib/src/sets.erl index c65a13b22e..ac0fc80526 100644 --- a/lib/stdlib/src/sets.erl +++ b/lib/stdlib/src/sets.erl @@ -37,7 +37,7 @@ -module(sets). %% Standard interface. --export([new/0,is_set/1,size/1,to_list/1,from_list/1]). +-export([new/0,is_set/1,size/1,is_empty/1,to_list/1,from_list/1]). -export([is_element/2,add_element/2,del_element/2]). -export([union/2,union/1,intersection/2,intersection/1]). -export([is_disjoint/2]). @@ -96,6 +96,12 @@ is_set(_) -> false. Set :: set(). size(S) -> S#set.size. +%% is_empty(Set) -> boolean(). +%% Return 'true' if Set is an empty set, otherwise 'false'. +-spec is_empty(Set) -> boolean() when + Set :: set(). +is_empty(S) -> S#set.size=:=0. + %% to_list(Set) -> [Elem]. %% Return the elements in Set as a list. -spec to_list(Set) -> List when diff --git a/lib/stdlib/test/sets_SUITE.erl b/lib/stdlib/test/sets_SUITE.erl index bec38000b2..7066d07e19 100644 --- a/lib/stdlib/test/sets_SUITE.erl +++ b/lib/stdlib/test/sets_SUITE.erl @@ -28,7 +28,7 @@ init_per_testcase/2,end_per_testcase/2, create/1,add_element/1,del_element/1, subtract/1,intersection/1,union/1,is_subset/1, - is_set/1,fold/1,filter/1, + is_set/1,is_empty/1,fold/1,filter/1, take_smallest/1,take_largest/1, iterate/1]). -include_lib("common_test/include/ct.hrl"). @@ -48,7 +48,7 @@ suite() -> all() -> [create, add_element, del_element, subtract, intersection, union, is_subset, is_set, fold, filter, - take_smallest, take_largest, iterate]. + take_smallest, take_largest, iterate, is_empty]. groups() -> []. @@ -345,6 +345,17 @@ is_set_1(M) -> false = M(is_set, {}), M(empty, []). +is_empty(Config) when is_list(Config) -> + test_all(fun is_empty_1/1). + +is_empty_1(M) -> + S = M(from_list, [blurf]), + Empty = M(empty, []), + + true = M(is_empty, Empty), + false = M(is_empty, S), + M(empty, []). + fold(Config) when is_list(Config) -> test_all([{0,71},{125,129},{254,259},{510,513},{1023,1025},{9999,10001}], fun fold_1/2). diff --git a/lib/stdlib/test/sets_test_lib.erl b/lib/stdlib/test/sets_test_lib.erl index 9f153822a2..93d027704b 100644 --- a/lib/stdlib/test/sets_test_lib.erl +++ b/lib/stdlib/test/sets_test_lib.erl @@ -32,7 +32,7 @@ new(Mod, Eq) -> (from_list, L) -> Mod:from_list(L); (intersection, {S1,S2}) -> intersection(Mod, Eq, S1, S2); (intersection, Ss) -> intersection(Mod, Eq, Ss); - (is_empty, S) -> is_empty(Mod, S); + (is_empty, S) -> Mod:is_empty(S); (is_set, S) -> Mod:is_set(S); (is_subset, {S,Set}) -> is_subset(Mod, Eq, S, Set); (iterator, S) -> Mod:iterator(S); @@ -56,7 +56,7 @@ singleton(Mod, E) -> add_element(Mod, El, S0) -> S = Mod:add_element(El, S0), true = Mod:is_element(El, S), - false = is_empty(Mod, S), + false = Mod:is_empty(S), true = Mod:is_set(S), S. @@ -66,17 +66,10 @@ del_element(Mod, El, S0) -> true = Mod:is_set(S), S. -is_empty(Mod, S) -> - true = Mod:is_set(S), - case erlang:function_exported(Mod, is_empty, 1) of - true -> Mod:is_empty(S); - false -> Mod:size(S) == 0 - end. - intersection(Mod, Equal, S1, S2) -> S = Mod:intersection(S1, S2), true = Equal(S, Mod:intersection(S2, S1)), - Disjoint = is_empty(Mod, S), + Disjoint = Mod:is_empty(S), Disjoint = Mod:is_disjoint(S1, S2), Disjoint = Mod:is_disjoint(S2, S1), S. diff --git a/lib/tools/emacs/erlang.el b/lib/tools/emacs/erlang.el index 45c6cb3f0f..b88f368746 100644 --- a/lib/tools/emacs/erlang.el +++ b/lib/tools/emacs/erlang.el @@ -884,7 +884,6 @@ resulting regexp is surrounded by \\_< and \\_>." "alloc_sizes" "append" "append_element" - "await_proc_exit" "bump_reductions" "call_on_load_function" "cancel_timer" diff --git a/lib/xmerl/src/xmerl_xsd.erl b/lib/xmerl/src/xmerl_xsd.erl index a89b3159ec..d727084175 100644 --- a/lib/xmerl/src/xmerl_xsd.erl +++ b/lib/xmerl/src/xmerl_xsd.erl @@ -18,7 +18,7 @@ %% %CopyrightEnd% %% -%% @doc Interface module for XML Schema vlidation. +%% @doc Interface module for XML Schema validation. %% It handles the W3.org %% <a href="http://www.w3.org/XML/Schema#dev">specifications</a> %% of XML Schema second edition 28 october 2004. For an introduction to |