From 6e01408aba71e26884c5db81b8e4fa89bd803576 Mon Sep 17 00:00:00 2001 From: Rickard Green Date: Fri, 21 Sep 2012 15:12:07 +0200 Subject: Implement true asynchronous signaling between processes and ports --- erts/doc/src/erl.xml | 60 +- erts/doc/src/erlang.xml | 152 +- erts/emulator/Makefile.in | 6 +- erts/emulator/beam/atom.names | 6 + erts/emulator/beam/beam_emu.c | 2 +- erts/emulator/beam/bif.c | 381 ++-- erts/emulator/beam/bif.h | 21 - erts/emulator/beam/bif.tab | 32 +- erts/emulator/beam/binary.c | 6 +- erts/emulator/beam/dist.c | 152 +- erts/emulator/beam/erl_alloc.types | 7 +- erts/emulator/beam/erl_bif_ddll.c | 8 +- erts/emulator/beam/erl_bif_info.c | 302 ++- erts/emulator/beam/erl_bif_port.c | 791 ++++---- erts/emulator/beam/erl_bif_re.c | 16 +- erts/emulator/beam/erl_init.c | 43 +- erts/emulator/beam/erl_nif.c | 4 +- erts/emulator/beam/erl_port.h | 207 +- erts/emulator/beam/erl_port_task.c | 927 ++++++++- erts/emulator/beam/erl_port_task.h | 56 +- erts/emulator/beam/erl_process.c | 21 +- erts/emulator/beam/erl_thr_progress.h | 1 + erts/emulator/beam/erl_trace.h | 138 ++ erts/emulator/beam/global.h | 155 +- erts/emulator/beam/io.c | 3215 ++++++++++++++++++++++++++------ erts/emulator/beam/sys.h | 3 +- erts/emulator/beam/utils.c | 17 +- erts/emulator/test/busy_port_SUITE.erl | 30 +- erts/emulator/test/ddll_SUITE.erl | 2 +- erts/emulator/test/port_SUITE.erl | 84 +- erts/etc/common/erlexec.c | 2 + erts/preloaded/ebin/erlang.beam | Bin 42416 -> 47132 bytes erts/preloaded/ebin/erts_internal.beam | Bin 0 -> 1048 bytes erts/preloaded/ebin/prim_inet.beam | Bin 70100 -> 66224 bytes erts/preloaded/src/Makefile | 3 +- erts/preloaded/src/erlang.erl | 172 ++ erts/preloaded/src/erts_internal.erl | 41 + lib/hipe/cerl/erl_bif_types.erl | 105 +- lib/sasl/src/systools_make.erl | 3 +- system/doc/reference_manual/ports.xml | 13 +- 40 files changed, 5336 insertions(+), 1848 deletions(-) create mode 100644 erts/emulator/beam/erl_trace.h create mode 100644 erts/preloaded/ebin/erts_internal.beam create mode 100644 erts/preloaded/src/erts_internal.erl diff --git a/erts/doc/src/erl.xml b/erts/doc/src/erl.xml index f7d8d37fd3..85c6140b01 100644 --- a/erts/doc/src/erl.xml +++ b/erts/doc/src/erl.xml @@ -586,18 +586,38 @@ erts_alloc(3) for further information.

- - -

Enable synchronous message passing to ports.

-

As of OTP-R16 message passing to ports are truly asynchronously - implemented. Correctly written Erlang programs should be able - to handle this without any issues. Bugs in existing Erlang - programs that make false assumptions about message passing to - ports may, however, be tricky to find. This switch has been - introduced in order to at least make it easier to compare - behaviors during a transition period. Note that this flag is - deprecated as of its introduction, and is scheduled for removal - in OTP-R17.

+ + +

Control behavior of signals to ports.

+

As of OTP-R16 signals to ports are truly asynchronously + delivered. Note that signals always have been documented as + asynchronous. The underlying implementation has, however, + previously delivered these signals synchronously. Correctly + written Erlang programs should be able to handle this without + any issues. Bugs in existing Erlang programs that make false + assumptions about signals to ports may, however, be tricky to + find. This switch has been introduced in order to at least + make it easier to compare behaviors during a transition period. + Note that this flag is deprecated as of its + introduction, and is scheduled for removal in OTP-R17. + Behavior should be one of the following characters:

+ + d + The default. Asynchronous signals. A process that sends + a signal to a port may continue execution before the signal + has been delivered to the port. + s + Synchronous signals. A processes that sends a signal + to a port will not continue execution until the signal has + been delivered. Should only be used for testing and + debugging. + a + Asynchronous signals. As the default, but a processes + that sends a signal will even more frequently continue + execution before the signal has been delivered to the + port. Should only be used for testing and + debugging. + @@ -948,6 +968,22 @@ without prior notice.

+ +spp Bool + +

Set default scheduler hint for port parallelism. If set to + true, the VM will schedule port tasks when it by this can + improve the parallelism in the system. If set to false, + the VM will try to perform port tasks immediately and by this + improve latency at the expense of parallelism. If this + flag has not been passed, the default scheduler hint for port + parallelism is currently false. The default used can be + inspected in runtime by calling + erlang:system_info(port_parallelism). + The default can be overriden on port creation by passing the + parallelism + option to + open_port/2

. +

Suggested stack size, in kilowords, for scheduler threads. diff --git a/erts/doc/src/erlang.xml b/erts/doc/src/erlang.xml index 2da456d49f..57346d3935 100644 --- a/erts/doc/src/erlang.xml +++ b/erts/doc/src/erlang.xml @@ -1000,14 +1000,14 @@ b exit(Pid, Reason) -> true - Send an exit signal to a process + Send an exit signal to a process or port - Pid = pid() + Pid = pid() | port() Reason = term()

Sends an exit signal with exit reason Reason to - the process Pid.

+ the process or port identified by Pid.

The following behavior apply if Reason is any term except normal or kill:

If Pid is not trapping exits, Pid itself will @@ -2875,7 +2875,7 @@ os_prompt%  FileNameChar = integer() (1..255 or any Unicode codepoint, see description)  In = Out = integer() PortSettings = [Opt] -  Opt = {packet, N} | stream | {line, L} | {cd, Dir} | {env, Env} | {args, [ ArgString ]} | {arg0, ArgString} | exit_status | use_stdio | nouse_stdio | stderr_to_stdout | in | out | binary | eof +  Opt = {packet, N} | stream | {line, L} | {cd, Dir} | {env, Env} | {args, [ ArgString ]} | {arg0, ArgString} | exit_status | use_stdio | nouse_stdio | stderr_to_stdout | in | out | binary | eof | {parallelism, true|false}   N = 1 | 2 | 4   L = integer()   Dir = string() @@ -3173,6 +3173,18 @@ os_prompt% console window when spawning the port program. (This option has no effect on other platforms.)

 + {parallelism, Boolean} + +

Set scheduler hint for port parallelism. If set to true, + the VM will schedule port tasks when it by this can improve the + parallelism in the system. If set to false, the VM will + try to perform port tasks immediately and by this improving the + latency at the expense of parallelism. The default can be set on + system startup by passing the + +spp command line argument + to erl(1). +

+

The default is stream for all types of port and use_stdio for spawned ports.

@@ -3299,10 +3311,10 @@ os_prompt%

Closes an open port. Roughly the same as Port ! {self(), close} except for the error behaviour - (see below), and that the port does not reply with - {Port, closed}. Any process may close a port with - port_close/1, not only the port owner (the connected - process).

+ (see below), being synchronous, and that the port does + not reply with {Port, closed}. Any process may + close a port with port_close/1, not only the port owner + (the connected process).

For comparison: Port ! {self(), close} fails with badarg if Port cannot be sent to (i.e., Port refers neither to a port nor to a process). If @@ -3314,8 +3326,12 @@ os_prompt%

Note that any process can close a port using Port ! {PortOwner, close} just as if it itself was the port owner, but the reply always goes to the port owner.

-

In short: port_close(Port) has a cleaner and more - logical behaviour than Port ! {self(), close}.

+

As of OTP-R16 Port ! {PortOwner, close} is truly + asynchronous. Note that this operation has always been + documented as an asynchronous operation, while the underlying + implementation has been synchronous. port_close/1 is + however still fully synchronous. This due to its error + behavior.

Failure: badarg if Port is not an open port or the registered name of an open port.

 @@ -3329,11 +3345,11 @@ os_prompt%

Sends data to a port. Same as - Port ! {self(), {command, Data}} except for the error - behaviour (see below). Any process may send data to a port - with port_command/2, not only the port owner - (the connected process).

-

For comparison: Port ! {self(), {command, Data}} + Port ! {PortOwner, {command, Data}} except for the error + behaviour and being synchronous (see below). Any process may + send data to a port with port_command/2, not only the + port owner (the connected process).

+

For comparison: Port ! {PortOwner, {command, Data}} fails with badarg if Port cannot be sent to (i.e., Port refers neither to a port nor to a process). If Port is a closed port the data message disappears @@ -3344,11 +3360,14 @@ os_prompt%

Note that any process can send to a port using Port ! {PortOwner, {command, Data}} just as if it itself was the port owner.

-

In short: port_command(Port, Data) has a cleaner and - more logical behaviour than - Port ! {self(), {command, Data}}.

If the port is busy, the calling process will be suspended until the port is not busy anymore.

+

As of OTP-R16 Port ! {PortOwner, {command, Data}} is + truly asynchronous. Note that this operation has always been + documented as an asynchronous operation, while the underlying + implementation has been synchronous. port_command/2 is + however still fully synchronous. This due to its error + behavior.

Failures:

badarg @@ -3433,7 +3452,7 @@ os_prompt%

Sets the port owner (the connected port) to Pid. - Roughly the same as Port ! {self(), {connect, Pid}} + Roughly the same as Port ! {Owner, {connect, Pid}} except for the following:

@@ -3443,6 +3462,9 @@ os_prompt%

The port does not reply with {Port,connected}.

 + +

port_connect/1 is synchronous, see below.

+

The new port owner gets linked to the port.

 @@ -3467,9 +3489,12 @@ os_prompt% Port ! {PortOwner, {connect, Pid}} just as if it itself was the port owner, but the reply always goes to the port owner.

-

In short: port_connect(Port, Pid) has a cleaner and - more logical behaviour than - Port ! {self(),{connect,Pid}}.

+

As of OTP-R16 Port ! {PortOwner, {connect, Pid}} is + truly asynchronous. Note that this operation has always been + documented as an asynchronous operation, while the underlying + implementation has been synchronous. port_connect/2 is + however still fully synchronous. This due to its error + behavior.

Failure: badarg if Port is not an open port or the registered name of an open port, or if Pid is not an existing local pid.

@@ -3538,12 +3563,35 @@ os_prompt% the Port, or undefined if the port is not open. The order of the tuples is not defined, nor are all the tuples mandatory.

+

Currently the result will containt information about the + following Items: registered_name (if the port has + a registed name), id, connected, links, + name, input, and output. For more information + about the different Items, see + port_info/2.

+

Failure: badarg if Port is not a local port.

+ + + + erlang:port_info(Port, Item) -> {Item, Info} | undefined | [] + Information about a port + + Port = port() | atom() + Item, Info -- see below + + +

Returns information about Port as specified + by Item, or undefined if the port is not open. + Also, if Item == registered_name and the port has no + registered name, [] is returned.

+

Valid values of Item, and corresponding {Item, Info} + tuples:

{registered_name, RegName}

RegName (an atom) is the registered name of - the port. If the port has no registered name, this tuple - is not present in the list.

+ the port. If the port has no registered name, [] + is returned.

 {id, Index} @@ -3574,28 +3622,43 @@ os_prompt%

Bytes is the total number of bytes written to the port.

 + {monitors, Monitors} + +

Monitors represent processes that this port + is monitoring. Note that the type of Monitors is + likey to change in the future.

+ + {parallelism, Boolean} + +

Boolean corresponds to the port parallelism + hint being used by this port. For more information see + the parallelism + option of open_port/2.

+ + {memory, MemSz} + +

MemSz is the total amount of memory, in bytes, + allocated for this port by the runtime system. Note that + the port itself might have allocated memory which is not + included in MemSz.

+ + {queue_size, QSz} + +

QSz is the total amount of data, in bytes, queued + by the port using the ERTS driver queue implementation.

+ + {locking, Locking} + +

Locking is currently either false (emulator + without SMP support), port_level (port specific locking), + or driver_level (driver specific locking). Note that + these results are highly implementation specific and might + change in the future.

+

Failure: badarg if Port is not a local port.

 - - erlang:port_info(Port, Item) -> {Item, Info} | undefined | [] - Information about a port - - Port = port() | atom() - Item, Info -- see below - - -

Returns information about Port as specified - by Item, or undefined if the port is not open. - Also, if Item == registered_name and the port has no - registered name, [] is returned.

-

For valid values of Item, and corresponding - values of Info, see - erlang:port_info/1.

-

Failure: badarg if Port is not a local port.

- - erlang:port_to_list(Port) -> string() Text representation of a port identifier @@ -5954,6 +6017,11 @@ ok

Returns a string containing the OTP release number.

 + port_parallelism +

Returns the default port parallelism scheduling hint used. + For more information see the + +spp command line argument + of erl(1).

 process_count

Returns the number of ports currently existing at diff --git a/erts/emulator/Makefile.in b/erts/emulator/Makefile.in index 47089f7dd0..5381ae3bea 100644 --- a/erts/emulator/Makefile.in +++ b/erts/emulator/Makefile.in @@ -575,7 +575,8 @@ $(PRELOAD_SRC): $(ERL_TOP)/erts/preloaded/ebin/otp_ring0.beam \ $(ERL_TOP)/erts/preloaded/ebin/zlib.beam \ $(ERL_TOP)/erts/preloaded/ebin/prim_zip.beam \ $(ERL_TOP)/erts/preloaded/ebin/erl_prim_loader.beam \ - $(ERL_TOP)/erts/preloaded/ebin/erlang.beam + $(ERL_TOP)/erts/preloaded/ebin/erlang.beam \ + $(ERL_TOP)/erts/preloaded/ebin/erts_internal.beam LANG=C $(PERL) utils/make_preload $(MAKE_PRELOAD_EXTRA) -rc $^ > $@ else PRELOAD_OBJ = $(OBJDIR)/preload.o @@ -587,7 +588,8 @@ $(PRELOAD_SRC): $(ERL_TOP)/erts/preloaded/ebin/otp_ring0.beam \ $(ERL_TOP)/erts/preloaded/ebin/zlib.beam \ $(ERL_TOP)/erts/preloaded/ebin/prim_zip.beam \ $(ERL_TOP)/erts/preloaded/ebin/erl_prim_loader.beam \ - $(ERL_TOP)/erts/preloaded/ebin/erlang.beam + $(ERL_TOP)/erts/preloaded/ebin/erlang.beam \ + $(ERL_TOP)/erts/preloaded/ebin/erts_internal.beam LANG=C $(PERL) utils/make_preload -old $^ > $@ endif diff --git a/erts/emulator/beam/atom.names b/erts/emulator/beam/atom.names index d6d8633f6f..30b891be5d 100644 --- a/erts/emulator/beam/atom.names +++ b/erts/emulator/beam/atom.names @@ -94,6 +94,7 @@ atom asynchronous atom atom atom atom_used atom attributes +atom await_port_send_result atom await_proc_exit atom await_sched_wall_time_modifications atom awaiting_load @@ -152,6 +153,7 @@ atom connection_closed atom cons atom const atom context_switches +atom control atom copy atom cpu atom cpu_timestamp @@ -204,6 +206,7 @@ atom erlang atom ERROR='ERROR' atom error_handler atom error_logger +atom erts_internal atom ets atom ETS_TRANSFER='ETS-TRANSFER' atom event @@ -237,6 +240,7 @@ atom gc_end atom gc_start atom Ge='>=' atom generational +atom get_data atom get_seq_token atom get_tcw atom getenv @@ -408,6 +412,7 @@ atom overlapped_io atom owner atom packet atom packet_size +atom parallelism atom Plus='+' atom pause atom pending @@ -482,6 +487,7 @@ atom sequential_trace_token atom serial atom set atom set_cpu_topology +atom set_data atom set_on_first_link atom set_on_first_spawn atom set_on_link diff --git a/erts/emulator/beam/beam_emu.c b/erts/emulator/beam/beam_emu.c index d8ccbacc26..106f742272 100644 --- a/erts/emulator/beam/beam_emu.c +++ b/erts/emulator/beam/beam_emu.c @@ -1135,7 +1135,7 @@ init_emulator(void) void dtrace_drvport_str(ErlDrvPort drvport, char *port_buf) { - Port *port = erts_drvport2port(drvport); + Port *port = erts_drvport2port(drvport, NULL); erts_snprintf(port_buf, DTRACE_TERM_BUF_SIZE, "#Port<%lu.%lu>", port_channel_no(port->common.id), diff --git a/erts/emulator/beam/bif.c b/erts/emulator/beam/bif.c index dc0dcbabd6..3ab8fdb2c7 100644 --- a/erts/emulator/beam/bif.c +++ b/erts/emulator/beam/bif.c @@ -43,6 +43,7 @@ static Export* flush_monitor_message_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 *await_sched_wall_time_mod_trap; @@ -157,22 +158,37 @@ BIF_RETTYPE link_1(BIF_ALIST_1) } if (is_internal_port(BIF_ARG_1)) { - Port *pt = erts_id2port_sflgs(BIF_ARG_1, - BIF_P, - ERTS_PROC_LOCK_MAIN, - ERTS_PORT_SFLGS_INVALID_LOOKUP); - if (!pt) { + int send_link_signal = 0; + Port *prt = erts_port_lookup(BIF_ARG_1, ERTS_PORT_SFLGS_INVALID_LOOKUP); + if (!prt) { goto res_no_proc; } erts_smp_proc_lock(BIF_P, ERTS_PROC_LOCK_LINK); if (erts_add_link(&ERTS_P_LINKS(BIF_P), LINK_PID, BIF_ARG_1) >= 0) - erts_add_link(&ERTS_P_LINKS(pt), LINK_PID, BIF_P->common.id); + send_link_signal = 1; /* else: already linked */ erts_smp_proc_unlock(BIF_P, ERTS_PROC_LOCK_LINK); - erts_port_release(pt); + + if (send_link_signal) { + Eterm ref; + Eterm *refp = erts_port_synchronous_ops ? &ref : NULL; + + switch (erts_port_link(BIF_P, prt, BIF_P->common.id, refp)) { + case ERTS_PORT_OP_DROPPED: + case ERTS_PORT_OP_BADARG: + goto res_no_proc; + case ERTS_PORT_OP_SCHEDULED: + if (refp) { + ASSERT(is_internal_ref(ref)); + BIF_TRAP3(await_port_send_result_trap, BIF_P, ref, am_true, am_true); + } + default: + break; + } + } BIF_RET(am_true); } else if (is_external_port(BIF_ARG_1) @@ -944,36 +960,39 @@ BIF_RETTYPE unlink_1(BIF_ALIST_1) } if (is_internal_port(BIF_ARG_1)) { - Port *pt = erts_id2port_sflgs(BIF_ARG_1, - BIF_P, - ERTS_PROC_LOCK_MAIN, - ERTS_PORT_SFLGS_DEAD); - erts_smp_proc_lock(BIF_P, ERTS_PROC_LOCK_LINK|ERTS_PROC_LOCK_STATUS); #ifdef ERTS_SMP - if (ERTS_PROC_PENDING_EXIT(BIF_P)) { - if (pt) - erts_port_release(pt); + if (ERTS_PROC_PENDING_EXIT(BIF_P)) goto handle_pending_exit; - } #endif l = erts_remove_link(&ERTS_P_LINKS(BIF_P), BIF_ARG_1); - ASSERT(pt || !l); - - if (pt) { - rl = erts_remove_link(&ERTS_P_LINKS(pt), BIF_P->common.id); - erts_port_release(pt); - if (rl) - erts_destroy_link(rl); - } - erts_smp_proc_unlock(BIF_P, ERTS_PROC_LOCK_LINK|ERTS_PROC_LOCK_STATUS); - if (l) + if (l) { + Port *prt; + erts_destroy_link(l); + /* Send unlink signal */ + prt = erts_port_lookup(BIF_ARG_1, ERTS_PORT_SFLGS_DEAD); + if (prt) { + ErtsPortOpResult res; + Eterm ref; + Eterm *refp = erts_port_synchronous_ops ? &ref : NULL; +#ifdef DEBUG + ref = NIL; +#endif + res = erts_port_unlink(BIF_P, prt, BIF_P->common.id, refp); + + if (refp && res == ERTS_PORT_OP_SCHEDULED) { + ASSERT(is_internal_ref(ref)); + BIF_TRAP3(await_port_send_result_trap, BIF_P, ref, am_true, am_true); + } + } + } + BIF_RET(am_true); } else if (is_external_port(BIF_ARG_1) @@ -1344,15 +1363,28 @@ BIF_RETTYPE exit_2(BIF_ALIST_2) */ if (is_internal_port(BIF_ARG_1)) { - Port *prt; - erts_smp_proc_unlock(BIF_P, ERTS_PROC_LOCK_MAIN); - prt = erts_id2port(BIF_ARG_1); + Port *prt = erts_port_lookup(BIF_ARG_1, ERTS_PORT_SFLGS_INVALID_LOOKUP); + if (prt) { - erts_do_exit_port(prt, BIF_P->common.id, BIF_ARG_2); - erts_port_release(prt); + Eterm ref; + Eterm *refp = erts_port_synchronous_ops ? &ref : NULL; + ErtsPortOpResult res; + +#ifdef DEBUG + ref = NIL; +#endif + + res = erts_port_exit(BIF_P, 0, prt, BIF_P->common.id, BIF_ARG_2, refp); + + ERTS_BIF_CHK_EXITED(BIF_P); + + if (refp && res == ERTS_PORT_OP_SCHEDULED) { + ASSERT(is_internal_ref(ref)); + BIF_TRAP3(await_port_send_result_trap, BIF_P, ref, am_true, am_true); + } + } - erts_smp_proc_lock(BIF_P, ERTS_PROC_LOCK_MAIN); - ERTS_BIF_CHK_EXITED(BIF_P); + BIF_RET(am_true); } else if(is_external_port(BIF_ARG_1) @@ -1516,22 +1548,24 @@ BIF_RETTYPE process_flag_2(BIF_ALIST_2) } /* * NOTE: It is important that we check for pending exit signals - * and handle them before flag trap_exit is set to true. - * For more info, see implementation of erts_send_exit_signal(). + * and handle them before returning if trap_exit is set to + * true. For more info, see implementation of + * erts_send_exit_signal(). */ - erts_smp_proc_lock(BIF_P, ERTS_PROC_LOCK_STATUS); - ERTS_SMP_LC_ASSERT((ERTS_PROC_LOCK_MAIN|ERTS_PROC_LOCK_STATUS) - & erts_proc_lc_my_proc_locks(BIF_P)); - ERTS_SMP_BIF_CHK_PENDING_EXIT(BIF_P, - ERTS_PROC_LOCK_MAIN|ERTS_PROC_LOCK_STATUS); if (trap_exit) - state = erts_smp_atomic32_read_bor_nob(&BIF_P->state, - ERTS_PSFLG_TRAP_EXIT); + state = erts_smp_atomic32_read_bor_mb(&BIF_P->state, + ERTS_PSFLG_TRAP_EXIT); else - state = erts_smp_atomic32_read_band_nob(&BIF_P->state, - ~ERTS_PSFLG_TRAP_EXIT); + state = erts_smp_atomic32_read_band_mb(&BIF_P->state, + ~ERTS_PSFLG_TRAP_EXIT); +#ifdef ERTS_SMP + if (ERTS_PROC_PENDING_EXIT(BIF_P)) { + erts_handle_pending_exit(BIF_P, ERTS_PROC_LOCK_MAIN); + ERTS_BIF_EXITED(BIF_P); + } +#endif + old_value = (state & ERTS_PSFLG_TRAP_EXIT) ? am_true : am_false; - erts_smp_proc_unlock(BIF_P, ERTS_PROC_LOCK_STATUS); BIF_RET(old_value); } else if (BIF_ARG_1 == am_scheduler) { @@ -1746,8 +1780,9 @@ ebif_bang_2(BIF_ALIST_2) #define SEND_BADARG (-4) #define SEND_USER_ERROR (-5) #define SEND_INTERNAL_ERROR (-6) +#define SEND_AWAIT_RESULT (-7) -Sint do_send(Process *p, Eterm to, Eterm msg, int suspend); +Sint do_send(Process *p, Eterm to, Eterm msg, int suspend, Eterm *refp); static Sint remote_send(Process *p, DistEntry *dep, Eterm to, Eterm full_to, Eterm msg, int suspend) @@ -1801,7 +1836,7 @@ static Sint remote_send(Process *p, DistEntry *dep, } Sint -do_send(Process *p, Eterm to, Eterm msg, int suspend) { +do_send(Process *p, Eterm to, Eterm msg, int suspend, Eterm *refp) { Eterm portid; Port *pt; Process* rp; @@ -1813,13 +1848,10 @@ do_send(Process *p, Eterm to, Eterm msg, int suspend) { trace_send(p, to, msg); if (ERTS_PROC_GET_SAVED_CALLS_BUF(p)) save_calls(p, &exp_send); - - rp = erts_proc_lookup_raw(to); - - if (!rp) { - ERTS_SMP_ASSERT_IS_NOT_EXITING(p); + + rp = erts_proc_lookup_raw(to); + if (!rp) return 0; - } } else if (is_external_pid(to)) { dep = external_pid_dist_entry(to); if(dep == erts_this_dist_entry) { @@ -1837,45 +1869,24 @@ do_send(Process *p, Eterm to, Eterm msg, int suspend) { } return remote_send(p, dep, to, to, msg, suspend); } else if (is_atom(to)) { - - /* Need to virtual schedule out sending process - * because of lock wait. This is only necessary - * for internal port calling but the lock is bundled - * with name lookup. - */ - - if (IS_TRACED_FL(p, F_TRACE_SCHED_PROCS)) { - trace_virtual_sched(p, am_out); - } - if (erts_system_profile_flags.runnable_procs && erts_system_profile_flags.exclusive) { - profile_runnable_proc(p, am_inactive); - } - erts_whereis_name(p, ERTS_PROC_LOCK_MAIN, - to, - &rp, 0, 0, - &pt); + Eterm id = erts_whereis_name_to_id(p, to); + + rp = erts_proc_lookup(id); + if (rp) + goto send_message; + pt = erts_port_lookup(id, ERTS_PORT_SFLGS_INVALID_LOOKUP); if (pt) { - portid = pt->common.id; + portid = id; goto port_common; } - - /* Not a port virtually schedule the process back in */ - if (IS_TRACED_FL(p, F_TRACE_SCHED_PROCS)) { - trace_virtual_sched(p, am_in); - } - if (erts_system_profile_flags.runnable_procs && erts_system_profile_flags.exclusive) { - profile_runnable_proc(p, am_active); - } if (IS_TRACED(p)) trace_send(p, to, msg); if (ERTS_PROC_GET_SAVED_CALLS_BUF(p)) save_calls(p, &exp_send); - if (!rp) { - return SEND_BADARG; - } + return SEND_BADARG; } else if (is_external_port(to) && (external_port_dist_entry(to) == erts_this_dist_entry)) { @@ -1891,49 +1902,48 @@ do_send(Process *p, Eterm to, Eterm msg, int suspend) { erts_send_error_to_logger(p->group_leader, dsbufp); return 0; } else if (is_internal_port(to)) { + int ret_val; portid = to; - /* schedule out calling process, waiting for lock*/ - if (IS_TRACED_FL(p, F_TRACE_SCHED_PROCS)) { - trace_virtual_sched(p, am_out); - } - if (erts_system_profile_flags.runnable_procs && erts_system_profile_flags.exclusive) { - profile_runnable_proc(p, am_inactive); - } - pt = erts_id2port_sflgs(to, - p, - ERTS_PROC_LOCK_MAIN, - ERTS_PORT_SFLGS_INVALID_LOOKUP); + + pt = erts_port_lookup(portid, ERTS_PORT_SFLGS_INVALID_LOOKUP); + port_common: - ERTS_SMP_LC_ASSERT(!pt || erts_lc_is_port_locked(pt)); + ret_val = 0; - /* We have waited for locks, trace schedule ports */ if (pt) { - erts_aint32_t flags; - if (IS_TRACED_FL(pt, F_TRACE_SCHED_PORTS)) { - trace_sched_ports_where(pt, am_in, am_command); - } - if (erts_system_profile_flags.runnable_ports && !erts_port_is_scheduled(pt)) { - profile_runnable_port(pt, am_active); - } - - flags = erts_atomic32_read_rb(&pt->sched.flags); - /* XXX let port_command handle the busy stuff !!! */ - if (flags & ERTS_PTS_FLG_BUSY) { + int ps_flags = suspend ? 0 : ERTS_PORT_SIG_FLG_NOSUSPEND; + *refp = NIL; + + switch (erts_port_command(p, ps_flags, pt, msg, refp)) { + case ERTS_PORT_OP_CALLER_EXIT: + /* We are exiting... */ + return SEND_USER_ERROR; + case ERTS_PORT_OP_BUSY: + /* Nothing has been sent */ + if (suspend) + erts_suspend(p, ERTS_PROC_LOCK_MAIN, pt); + return SEND_YIELD; + case ERTS_PORT_OP_BUSY_SCHEDULED: + /* Message was sent */ if (suspend) { erts_suspend(p, ERTS_PROC_LOCK_MAIN, pt); - if (erts_system_monitor_flags.busy_port) { - monitor_generic(p, am_busy_port, portid); - } - } - /* Virtually schedule out the port before releasing */ - if (IS_TRACED_FL(pt, F_TRACE_SCHED_PORTS)) { - trace_sched_ports_where(pt, am_out, am_command); + ret_val = SEND_YIELD_RETURN; + break; } - if (erts_system_profile_flags.runnable_ports && !erts_port_is_scheduled(pt)) { - profile_runnable_port(pt, am_inactive); + /* Fall through */ + case ERTS_PORT_OP_SCHEDULED: + if (is_not_nil(*refp)) { + ASSERT(is_internal_ref(*refp)); + ret_val = SEND_AWAIT_RESULT; } - erts_port_release(pt); - return SEND_YIELD; + break; + case ERTS_PORT_OP_DROPPED: + case ERTS_PORT_OP_BADARG: + case ERTS_PORT_OP_DONE: + break; + default: + ERTS_INTERNAL_ERROR("Unexpected erts_port_command() result"); + break; } } @@ -1952,30 +1962,11 @@ do_send(Process *p, Eterm to, Eterm msg, int suspend) { SEQ_TRACE_SEND, portid, p); } - /* XXX NO GC in port command */ - erts_port_command(p, p->common.id, pt, msg); - if (pt) { - /* Virtually schedule out the port before releasing */ - if (IS_TRACED_FL(pt, F_TRACE_SCHED_PORTS)) { - trace_sched_ports_where(pt, am_out, am_command); - } - if (erts_system_profile_flags.runnable_ports && !erts_port_is_scheduled(pt)) { - profile_runnable_port(pt, am_inactive); - } - erts_port_release(pt); - } - /* Virtually schedule in process */ - if (IS_TRACED_FL(p, F_TRACE_SCHED_PROCS)) { - trace_virtual_sched(p, am_in); - } - if (erts_system_profile_flags.runnable_procs && erts_system_profile_flags.exclusive) { - profile_runnable_proc(p, am_active); - } if (ERTS_PROC_IS_EXITING(p)) { KILL_CATCHES(p); /* Must exit */ return SEND_USER_ERROR; } - return 0; + return ret_val; } else if (is_tuple(to)) { /* Remote send */ int ret; tp = tuple_val(to); @@ -1991,47 +1982,24 @@ do_send(Process *p, Eterm to, Eterm msg, int suspend) { dep = erts_sysname_to_connected_dist_entry(tp[2]); if (dep == erts_this_dist_entry) { + Eterm id; erts_deref_dist_entry(dep); if (IS_TRACED(p)) trace_send(p, to, msg); if (ERTS_PROC_GET_SAVED_CALLS_BUF(p)) save_calls(p, &exp_send); - - /* Need to virtual schedule out sending process - * because of lock wait. This is only necessary - * for internal port calling but the lock is bundled. - */ - - if (IS_TRACED_FL(p, F_TRACE_SCHED_PROCS)) { - trace_virtual_sched(p, am_out); - } - if (erts_system_profile_flags.runnable_procs && erts_system_profile_flags.exclusive) { - profile_runnable_proc(p, am_inactive); - } - erts_whereis_name(p, ERTS_PROC_LOCK_MAIN, - tp[1], - &rp, 0, 0, - &pt); + id = erts_whereis_name_to_id(p, tp[1]); + + rp = erts_proc_lookup_raw(id); + if (rp) + goto send_message; + pt = erts_port_lookup(id, ERTS_PORT_SFLGS_INVALID_LOOKUP); if (pt) { - portid = pt->common.id; + portid = id; goto port_common; } - /* Port lookup failed, virtually schedule the process - * back in. - */ - - if (IS_TRACED_FL(p, F_TRACE_SCHED_PROCS)) { - trace_virtual_sched(p, am_in); - } - if (erts_system_profile_flags.runnable_procs && erts_system_profile_flags.exclusive) { - profile_runnable_proc(p, am_active); - } - - if (!rp) { - return 0; - } - goto send_message; + return 0; } ret = remote_send(p, dep, tp[1], to, msg, suspend); @@ -2070,6 +2038,7 @@ do_send(Process *p, Eterm to, Eterm msg, int suspend) { BIF_RETTYPE send_3(BIF_ALIST_3) { + Eterm ref; Process *p = BIF_P; Eterm to = BIF_ARG_1; Eterm msg = BIF_ARG_2; @@ -2093,12 +2062,18 @@ BIF_RETTYPE send_3(BIF_ALIST_3) if(!is_nil(l)) { BIF_ERROR(p, BADARG); } - - result = do_send(p, to, msg, suspend); + +#ifdef DEBUG + ref = NIL; +#endif + + result = do_send(p, to, msg, suspend, &ref); if (result > 0) { ERTS_VBUMP_REDS(p, result); BIF_RET(am_ok); - } else switch (result) { + } + + switch (result) { case 0: BIF_RET(am_ok); break; @@ -2121,6 +2096,9 @@ BIF_RETTYPE send_3(BIF_ALIST_3) ERTS_BIF_YIELD_RETURN(p, am_ok); else BIF_RET(am_nosuspend); + case SEND_AWAIT_RESULT: + ASSERT(is_internal_ref(ref)); + BIF_TRAP3(await_port_send_result_trap, p, ref, am_nosuspend, am_ok); case SEND_BADARG: BIF_ERROR(p, BADARG); break; @@ -2145,12 +2123,21 @@ BIF_RETTYPE send_2(BIF_ALIST_2) Eterm erl_send(Process *p, Eterm to, Eterm msg) { - Sint result = do_send(p, to, msg, !0); + Eterm ref; + Sint result; + +#ifdef DEBUG + ref = NIL; +#endif + + result = do_send(p, to, msg, !0, &ref); if (result > 0) { ERTS_VBUMP_REDS(p, result); BIF_RET(msg); - } else switch (result) { + } + + switch (result) { case 0: BIF_RET(msg); break; @@ -2162,6 +2149,9 @@ Eterm erl_send(Process *p, Eterm to, Eterm msg) break; case SEND_YIELD_RETURN: ERTS_BIF_YIELD_RETURN(p, msg); + case SEND_AWAIT_RESULT: + ASSERT(is_internal_ref(ref)); + BIF_TRAP3(await_port_send_result_trap, p, ref, msg, msg); case SEND_BADARG: BIF_ERROR(p, BADARG); break; @@ -3166,11 +3156,9 @@ static erts_smp_spinlock_t make_ref_lock; static erts_smp_mtx_t ports_snapshot_mtx; erts_smp_atomic_t erts_dead_ports_ptr; /* To store dying ports during snapshot */ -Eterm erts_make_ref_in_buffer(Eterm buffer[REF_THING_SIZE]) +void +erts_make_ref_in_array(Uint32 ref[ERTS_MAX_REF_NUMBERS]) { - Eterm* hp = buffer; - Uint32 ref0, ref1, ref2; - erts_smp_spin_lock(&make_ref_lock); reference0++; @@ -3182,24 +3170,36 @@ Eterm erts_make_ref_in_buffer(Eterm buffer[REF_THING_SIZE]) } } - ref0 = reference0; - ref1 = reference1; - ref2 = reference2; + ref[0] = reference0; + ref[1] = reference1; + ref[2] = reference2; erts_smp_spin_unlock(&make_ref_lock); +} + +Eterm erts_make_ref_in_buffer(Eterm buffer[REF_THING_SIZE]) +{ + Eterm* hp = buffer; + Uint32 ref[ERTS_MAX_REF_NUMBERS]; - write_ref_thing(hp, ref0, ref1, ref2); + erts_make_ref_in_array(ref); + write_ref_thing(hp, ref[0], ref[1], ref[2]); return make_internal_ref(hp); } Eterm erts_make_ref(Process *p) { Eterm* hp; + Uint32 ref[ERTS_MAX_REF_NUMBERS]; ERTS_SMP_LC_ASSERT(ERTS_PROC_LOCK_MAIN & erts_proc_lc_my_proc_locks(p)); hp = HAlloc(p, REF_THING_SIZE); - return erts_make_ref_in_buffer(hp); + + erts_make_ref_in_array(ref); + write_ref_thing(hp, ref[0], ref[1], ref[2]); + + return make_internal_ref(hp); } BIF_RETTYPE make_ref_0(BIF_ALIST_0) @@ -4507,6 +4507,8 @@ void erts_init_bif(void) 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); await_sched_wall_time_mod_trap = erts_export_put(am_erlang, am_await_sched_wall_time_modifications, 2); erts_smp_atomic32_init_nob(&sched_wall_time, 0); @@ -4522,19 +4524,18 @@ bif erlang:send_to_logger/2 BIF_RETTYPE send_to_logger_2(BIF_ALIST_2) { byte *buf; - int len; + ErlDrvSizeT len; if (!is_atom(BIF_ARG_1) || !(is_list(BIF_ARG_2) || is_nil(BIF_ARG_1))) { BIF_ERROR(BIF_P,BADARG); } - len = io_list_len(BIF_ARG_2); - if (len < 0) + if (erts_iolist_size(BIF_ARG_2, &len) != 0) BIF_ERROR(BIF_P,BADARG); else if (len == 0) buf = ""; else { #ifdef DEBUG - int len2; + ErlDrvSizeT len2; #endif buf = (byte *) erts_alloc(ERTS_ALC_T_TMP, len+1); #ifdef DEBUG @@ -4542,7 +4543,7 @@ BIF_RETTYPE send_to_logger_2(BIF_ALIST_2) #else (void) #endif - io_list_to_buf(BIF_ARG_2, buf, len); + erts_iolist_to_buf(BIF_ARG_2, buf, len); ASSERT(len2 == len); buf[len] = '\0'; switch (BIF_ARG_1) { @@ -4636,7 +4637,6 @@ BIF_RETTYPE dt_prepend_vm_tag_data_1(BIF_ALIST_1) #ifdef USE_VM_PROBES Eterm b; Eterm *hp; - hp = HAlloc(BIF_P,2); if (is_binary((DT_UTAG(BIF_P)))) { Uint sz = binary_size(DT_UTAG(BIF_P)); int i; @@ -4653,6 +4653,7 @@ BIF_RETTYPE dt_prepend_vm_tag_data_1(BIF_ALIST_1) } else { b = new_binary(BIF_P,(byte *)"\0",1); } + hp = HAlloc(BIF_P,2); BIF_RET(CONS(hp,b,BIF_ARG_1)); #else BIF_RET(BIF_ARG_1); @@ -4663,7 +4664,6 @@ BIF_RETTYPE dt_append_vm_tag_data_1(BIF_ALIST_1) #ifdef USE_VM_PROBES Eterm b; Eterm *hp; - hp = HAlloc(BIF_P,2); if (is_binary((DT_UTAG(BIF_P)))) { Uint sz = binary_size(DT_UTAG(BIF_P)); int i; @@ -4680,6 +4680,7 @@ BIF_RETTYPE dt_append_vm_tag_data_1(BIF_ALIST_1) } else { b = new_binary(BIF_P,(byte *)"\0",1); } + hp = HAlloc(BIF_P,2); BIF_RET(CONS(hp,BIF_ARG_1,b)); #else BIF_RET(BIF_ARG_1); diff --git a/erts/emulator/beam/bif.h b/erts/emulator/beam/bif.h index d20089a9fb..086dd9a5fd 100644 --- a/erts/emulator/beam/bif.h +++ b/erts/emulator/beam/bif.h @@ -322,27 +322,6 @@ do { \ ERTS_BIF_EXITED((PROC)); \ } while (0) -#ifdef ERTS_SMP -#define ERTS_SMP_BIF_CHK_PENDING_EXIT(P, L) \ -do { \ - ERTS_SMP_LC_ASSERT((L) == erts_proc_lc_my_proc_locks((P))); \ - ERTS_SMP_LC_ASSERT(ERTS_PROC_LOCK_MAIN & (L)); \ - if (!((L) & ERTS_PROC_LOCK_STATUS)) \ - erts_smp_proc_lock((P), ERTS_PROC_LOCK_STATUS); \ - if (ERTS_PROC_PENDING_EXIT((P))) { \ - erts_handle_pending_exit((P), (L)|ERTS_PROC_LOCK_STATUS); \ - erts_smp_proc_unlock((P), \ - (((L)|ERTS_PROC_LOCK_STATUS) \ - & ~ERTS_PROC_LOCK_MAIN)); \ - ERTS_BIF_EXITED((P)); \ - } \ - if (!((L) & ERTS_PROC_LOCK_STATUS)) \ - erts_smp_proc_unlock((P), ERTS_PROC_LOCK_STATUS); \ -} while (0) -#else -#define ERTS_SMP_BIF_CHK_PENDING_EXIT(P, L) -#endif - /* * The ERTS_BIF_*_AWAIT_X_*_TRAP makros either exits the caller, or * sets up a trap to erlang:await_proc_exit/3. diff --git a/erts/emulator/beam/bif.tab b/erts/emulator/beam/bif.tab index 8a85e102d1..c0a83c6f96 100644 --- a/erts/emulator/beam/bif.tab +++ b/erts/emulator/beam/bif.tab @@ -184,10 +184,6 @@ bif 'erl.lang.port':open/2 ebif_open_port_2 open_port_2 bif erlang:pid_to_list/1 bif 'erl.lang.proc':pid_to_string/1 ebif_pid_to_string_1 pid_to_list_1 -bif erlang:port_info/1 -bif 'erl.lang.port':info/1 ebif_port_info_1 -bif erlang:port_info/2 -bif 'erl.lang.port':info/2 ebif_port_info_2 bif erlang:ports/0 bif 'erl.lang.node':ports/0 ebif_ports_0 bif erlang:pre_loaded/0 @@ -256,24 +252,16 @@ bif erlang:setnode/2 bif erlang:setnode/3 bif erlang:dist_exit/3 -bif erlang:port_call/2 -bif 'erl.lang.port':call/2 ebif_port_call_2 -bif erlang:port_call/3 -bif 'erl.lang.port':call/3 ebif_port_call_3 -bif erlang:port_command/2 -bif 'erl.lang.port':command/2 ebif_port_command_2 -bif erlang:port_command/3 -bif 'erl.lang.port':command/3 ebif_port_command_3 -bif erlang:port_control/3 -bif 'erl.lang.port':control/3 ebif_port_control_3 -bif erlang:port_close/1 -bif 'erl.lang.port':close/1 ebif_port_close_1 -bif erlang:port_connect/2 -bif 'erl.lang.port':connect/2 ebif_port_connect_2 -bif erlang:port_set_data/2 -bif 'erl.lang.port':set_data/2 ebif_port_set_data_2 -bif erlang:port_get_data/1 -bif 'erl.lang.port':get_data/1 ebif_port_get_data_1 +# Static native functions in erts_internal +bif erts_internal:port_info/1 +bif erts_internal:port_info/2 +bif erts_internal:port_call/3 +bif erts_internal:port_command/3 +bif erts_internal:port_control/3 +bif erts_internal:port_close/1 +bif erts_internal:port_connect/2 +bif erts_internal:port_set_data/2 +bif erts_internal:port_get_data/1 # Tracing & debugging. bif erlang:trace_pattern/2 diff --git a/erts/emulator/beam/binary.c b/erts/emulator/beam/binary.c index 3d2725e239..4441dab181 100644 --- a/erts/emulator/beam/binary.c +++ b/erts/emulator/beam/binary.c @@ -355,10 +355,10 @@ BIF_RETTYPE bitstring_to_list_1(BIF_ALIST_1) BIF_RETTYPE erts_list_to_binary_bif(Process *p, Eterm arg) { Eterm bin; - Uint size; + ErlDrvSizeT size; byte* bytes; #ifdef DEBUG - int offset; + ErlDrvSizeT offset; #endif if (is_nil(arg)) { @@ -377,7 +377,7 @@ BIF_RETTYPE erts_list_to_binary_bif(Process *p, Eterm arg) #ifdef DEBUG offset = #endif - io_list_to_buf(arg, (char*) bytes, size); + erts_iolist_to_buf(arg, (char*) bytes, size); ASSERT(offset == 0); BIF_RET(bin); diff --git a/erts/emulator/beam/dist.c b/erts/emulator/beam/dist.c index f28d9dff09..a939b90eac 100644 --- a/erts/emulator/beam/dist.c +++ b/erts/emulator/beam/dist.c @@ -124,6 +124,13 @@ static void send_nodes_mon_msgs(Process *, Eterm, Eterm, Eterm, Eterm); static void init_nodes_monitors(void); static erts_smp_atomic_t no_caches; +static erts_smp_atomic_t no_nodes; + +struct { + Eterm reason; + ErlHeapFragment *bp; +} nodedown; + static void delete_cache(ErtsAtomCache *cache) @@ -393,6 +400,47 @@ static void doit_node_link_net_exits(ErtsLink *lnk, void *vnecp) erts_destroy_link(lnk); } +static void +set_node_not_alive(void *unused) +{ + ErlHeapFragment *bp; + Eterm nodename = erts_this_dist_entry->sysname; + + ASSERT(erts_smp_atomic_read_nob(&no_nodes) == 0); + + erts_smp_thr_progress_block(); + erts_set_this_node(am_Noname, 0); + erts_is_alive = 0; + send_nodes_mon_msgs(NULL, am_nodedown, nodename, am_visible, nodedown.reason); + nodedown.reason = NIL; + bp = nodedown.bp; + nodedown.bp = NULL; + erts_smp_thr_progress_unblock(); + if (bp) + free_message_buffer(bp); +} + +static ERTS_INLINE void +dec_no_nodes(void) +{ + erts_aint_t no = erts_smp_atomic_dec_read_mb(&no_nodes); + ASSERT(no >= 0); + ASSERT(erts_get_scheduler_id()); /* Need to be a scheduler */ + if (no == 0) + erts_schedule_misc_aux_work(erts_get_scheduler_id(), + set_node_not_alive, + NULL); +} + +static ERTS_INLINE void +inc_no_nodes(void) +{ +#ifdef DEBUG + erts_aint_t no = erts_smp_atomic_read_nob(&no_nodes); + ASSERT(erts_is_alive ? no > 0 : no == 0); +#endif + erts_smp_atomic_inc_mb(&no_nodes); +} /* * proc is currently running or exiting process. @@ -402,48 +450,76 @@ int erts_do_net_exits(DistEntry *dep, Eterm reason) Eterm nodename; if (dep == erts_this_dist_entry) { /* Net kernel has died (clean up!!) */ + DistEntry *tdep; + int no_dist_port = 0; Eterm nd_reason = (reason == am_no_network ? am_no_network : am_net_kernel_terminated); erts_smp_rwmtx_rwlock(&erts_dist_table_rwmtx); + for (tdep = erts_hidden_dist_entries; tdep; tdep = tdep->next) + no_dist_port++; + for (tdep = erts_visible_dist_entries; tdep; tdep = tdep->next) + no_dist_port++; + /* KILL all port controllers */ - while(erts_visible_dist_entries || erts_hidden_dist_entries) { - DistEntry *tdep; - Eterm prt_id; - Port *prt; - if(erts_hidden_dist_entries) - tdep = erts_hidden_dist_entries; + if (no_dist_port == 0) + erts_smp_rwmtx_rwunlock(&erts_dist_table_rwmtx); + else { + Eterm def_buf[128]; + int i = 0; + Eterm *dist_port; + + if (no_dist_port <= sizeof(def_buf)/sizeof(def_buf[0])) + dist_port = &def_buf[0]; else - tdep = erts_visible_dist_entries; - prt_id = tdep->cid; - ASSERT(is_internal_port(prt_id)); + dist_port = erts_alloc(ERTS_ALC_T_TMP, + sizeof(Eterm)*no_dist_port); + for (tdep = erts_hidden_dist_entries; tdep; tdep = tdep->next) { + ASSERT(is_internal_port(tdep->cid)); + dist_port[i++] = tdep->cid; + } + for (tdep = erts_visible_dist_entries; tdep; tdep = tdep->next) { + ASSERT(is_internal_port(tdep->cid)); + dist_port[i++] = tdep->cid; + } erts_smp_rwmtx_rwunlock(&erts_dist_table_rwmtx); - prt = erts_id2port(prt_id); - if (prt) { + for (i = 0; i < no_dist_port; i++) { + Port *prt = erts_port_lookup(dist_port[i], + ERTS_PORT_SFLGS_INVALID_LOOKUP); + if (!prt) + continue; ASSERT(erts_atomic32_read_nob(&prt->state) & ERTS_PORT_SFLG_DISTRIBUTION); - ASSERT(prt->dist_entry); - /* will call do_net_exists !!! */ - erts_do_exit_port(prt, prt_id, nd_reason); - erts_port_release(prt); + + erts_port_exit(NULL, ERTS_PORT_SIG_FLG_FORCE_SCHED, + prt, dist_port[i], nd_reason, NULL); } - erts_smp_rwmtx_rwlock(&erts_dist_table_rwmtx); + if (dist_port != &def_buf[0]) + erts_free(ERTS_ALC_T_TMP, dist_port); } - erts_smp_rwmtx_rwunlock(&erts_dist_table_rwmtx); - - nodename = erts_this_dist_entry->sysname; - erts_smp_thr_progress_block(); - erts_set_this_node(am_Noname, 0); - erts_is_alive = 0; - send_nodes_mon_msgs(NULL, am_nodedown, nodename, am_visible, nd_reason); - erts_smp_thr_progress_unblock(); - + /* + * When last dist port exits, node will be taken + * from alive to not alive. + */ + ASSERT(is_nil(nodedown.reason) && !nodedown.bp); + if (is_immed(nd_reason)) + nodedown.reason = nd_reason; + else { + Eterm *hp; + Uint sz = size_object(nd_reason); + nodedown.bp = new_message_buffer(sz); + hp = nodedown.bp->mem; + nodedown.reason = copy_struct(nd_reason, + sz, + &hp, + &nodedown.bp->off_heap); + } } - else { /* recursive call via erts_do_exit_port() will end up here */ + else { /* Call from distribution port */ NetExitsContext nec = {dep}; ErtsLink *nlinks; ErtsLink *node_links; @@ -503,6 +579,9 @@ int erts_do_net_exits(DistEntry *dep, Eterm reason) clear_dist_entry(dep); } + + dec_no_nodes(); + return 1; } @@ -516,6 +595,10 @@ void init_dist(void) { init_nodes_monitors(); + nodedown.reason = NIL; + nodedown.bp = NULL; + + erts_smp_atomic_init_nob(&no_nodes, 0); erts_smp_atomic_init_nob(&no_caches, 0); /* Lookup/Install all references to trap functions */ @@ -1601,7 +1684,7 @@ int erts_net_message(Port *prt, } #endif UnUseTmpHeapNoproc(DIST_CTL_DEFAULT_SIZE); - erts_do_exit_port(prt, dep->cid, am_killed); + erts_deliver_port_exit(prt, dep->cid, am_killed, 0); ERTS_SMP_CHK_NO_PROC_LOCKS; return -1; } @@ -1924,7 +2007,7 @@ erts_dist_command(Port *prt, int reds_limit) erts_smp_de_runlock(dep); if (status & ERTS_DE_SFLG_EXITING) { - erts_do_exit_port(prt, prt->common.id, am_killed); + erts_deliver_port_exit(prt, prt->common.id, am_killed, 0); erts_deref_dist_entry(dep); return reds + ERTS_PORT_REDS_DIST_CMD_EXIT; } @@ -2484,6 +2567,7 @@ BIF_RETTYPE setnode_2(BIF_ALIST_2) erts_smp_proc_unlock(BIF_P, ERTS_PROC_LOCK_MAIN); erts_smp_thr_progress_block(); + inc_no_nodes(); erts_set_this_node(BIF_ARG_1, (Uint32) creation); erts_is_alive = 1; send_nodes_mon_msgs(NULL, am_nodeup, BIF_ARG_1, am_visible, NIL); @@ -2638,6 +2722,8 @@ BIF_RETTYPE setnode_3(BIF_ALIST_3) erts_smp_de_rwunlock(dep); dep = NULL; /* inc of refc transferred to port (dist_entry field) */ + inc_no_nodes(); + send_nodes_mon_msgs(BIF_P, am_nodeup, BIF_ARG_1, @@ -2723,11 +2809,17 @@ BIF_RETTYPE dist_exit_3(BIF_ALIST_3) #endif erts_smp_proc_unlock(lp, lp_locks); if (lp == BIF_P) { + erts_aint32_t state = erts_smp_atomic32_read_acqb(&BIF_P->state); /* * We may have exited current process and may have to take action. */ - ERTS_BIF_CHK_EXITED(BIF_P); - ERTS_SMP_BIF_CHK_PENDING_EXIT(BIF_P, ERTS_PROC_LOCK_MAIN); + if (state & (ERTS_PSFLG_EXITING|ERTS_PSFLG_PENDING_EXIT)) { +#ifdef ERTS_SMP + if (state & ERTS_PSFLG_PENDING_EXIT) + erts_handle_pending_exit(BIF_P, ERTS_PROC_LOCK_MAIN); +#endif + ERTS_BIF_EXITED(BIF_P); + } } } else if (is_external_pid(local) diff --git a/erts/emulator/beam/erl_alloc.types b/erts/emulator/beam/erl_alloc.types index 36beec9553..264cbf8efe 100644 --- a/erts/emulator/beam/erl_alloc.types +++ b/erts/emulator/beam/erl_alloc.types @@ -190,6 +190,9 @@ type TIMER_WHEEL LONG_LIVED SYSTEM timer_wheel type DRV DRIVER SYSTEM drv_internal type DRV_BINARY BINARY BINARIES drv_binary type DRIVER DRIVER SYSTEM driver +type DRV_CMD_DATA DRIVER SYSTEM driver_command_data +type DRV_CTRL_DATA DRIVER SYSTEM driver_control_data +type DRV_CALL_DATA DRIVER SYSTEM driver_call_data type NIF DRIVER SYSTEM nif_internal type BINARY BINARY BINARIES binary type NBIF_TABLE SYSTEM SYSTEM nbif_tab @@ -203,7 +206,6 @@ type BITS_BUF STANDARD SYSTEM bits_buf type TMP_DIST_BUF TEMPORARY SYSTEM tmp_dist_buf type ASYNC_DATA LONG_LIVED SYSTEM internal_async_data type ESTACK TEMPORARY SYSTEM estack -type PORT_CALL_BUF TEMPORARY SYSTEM port_call_buf type DB_TABLE ETS ETS db_tab type DB_FIXATION SHORT_LIVED ETS db_fixation type DB_FIX_DEL SHORT_LIVED ETS fixed_del @@ -233,6 +235,7 @@ type DDLL_HANDLE STANDARD SYSTEM ddll_handle type DDLL_ERRCODES LONG_LIVED SYSTEM ddll_errcodes type DDLL_TMP_BUF TEMPORARY SYSTEM ddll_tmp_buf type PORT_TASK SHORT_LIVED SYSTEM port_task +type PT_HNDL_LIST SHORT_LIVED SYSTEM port_task_handle_list type MISC_OP_LIST SHORT_LIVED SYSTEM misc_op_list type PORT_NAMES SHORT_LIVED SYSTEM port_names type PORT_DATA_LOCK DRIVER SYSTEM port_data_lock @@ -262,6 +265,8 @@ type ZLIB STANDARD SYSTEM zlib type CPU_GRPS_MAP LONG_LIVED SYSTEM cpu_groups_map type AUX_WORK_TMO LONG_LIVED SYSTEM aux_work_timeouts type MISC_AUX_WORK_Q LONG_LIVED SYSTEM misc_aux_work_q +type BUSY_CALLER_TAB SHORT_LIVED SYSTEM busy_caller_table +type BUSY_CALLER SHORT_LIVED SYSTEM busy_caller +if threads_no_smp # Need thread safe allocs, but std_alloc and fix_alloc are not; diff --git a/erts/emulator/beam/erl_bif_ddll.c b/erts/emulator/beam/erl_bif_ddll.c index 2b6deae7be..7cbea55eac 100644 --- a/erts/emulator/beam/erl_bif_ddll.c +++ b/erts/emulator/beam/erl_bif_ddll.c @@ -182,7 +182,7 @@ BIF_RETTYPE erl_ddll_try_load_3(BIF_ALIST_3) Eterm name_term = BIF_ARG_2; Eterm options = BIF_ARG_3; char *path = NULL; - Uint path_len; + ErlDrvSizeT path_len; char *name = NULL; DE_Handle *dh; erts_driver_t *drv; @@ -261,7 +261,7 @@ BIF_RETTYPE erl_ddll_try_load_3(BIF_ALIST_3) goto error; } path = erts_alloc(ERTS_ALC_T_DDLL_TMP_BUF, path_len + 1 /* might need path separator */ + sys_strlen(name) + 1); - if (io_list_to_buf(path_term, path, path_len) != 0) { + if (erts_iolist_to_buf(path_term, path, path_len) != 0) { goto error; } while (path_len > 0 && (path[path_len-1] == '\\' || path[path_len-1] == '/')) { @@ -1841,7 +1841,7 @@ static Eterm mkatom(char *str) static char *pick_list_or_atom(Eterm name_term) { char *name = NULL; - Uint name_len; + ErlDrvSizeT name_len; if (is_atom(name_term)) { Atom *ap = atom_tab(atom_val(name_term)); if (ap->len == 0) { @@ -1857,7 +1857,7 @@ static char *pick_list_or_atom(Eterm name_term) goto error; } name = erts_alloc(ERTS_ALC_T_DDLL_TMP_BUF, name_len + 1); - if (io_list_to_buf(name_term, name, name_len) != 0) { + if (erts_iolist_to_buf(name_term, name, name_len) != 0) { goto error; } name[name_len] = '\0'; diff --git a/erts/emulator/beam/erl_bif_info.c b/erts/emulator/beam/erl_bif_info.c index 44c29252b2..f5a355a336 100644 --- a/erts/emulator/beam/erl_bif_info.c +++ b/erts/emulator/beam/erl_bif_info.c @@ -137,8 +137,6 @@ static char erts_system_version[] = ("Erlang " ERLANG_OTP_RELEASE static Eterm os_type_tuple; static Eterm os_version_tuple; -static BIF_RETTYPE port_info(Process* p, Eterm portid, Eterm item); - static Eterm current_function(Process* p, Process* rp, Eterm** hpp, int full_info); static Eterm current_stacktrace(Process* p, Process* rp, Eterm** hpp); @@ -1864,17 +1862,17 @@ info_1_tuple(Process* BIF_P, /* Pointer to current process. */ # define ERTS_ERROR_CHECKER_PRINTF_XML VALGRIND_PRINTF_XML # endif #endif - Uint buf_size = 8*1024; /* Try with 8KB first */ + ErlDrvSizeT buf_size = 8*1024; /* Try with 8KB first */ char *buf = erts_alloc(ERTS_ALC_T_TMP, buf_size); - int r = io_list_to_buf(*tp, (char*) buf, buf_size - 1); - if (r < 0) { + ErlDrvSizeT r = erts_iolist_to_buf(*tp, (char*) buf, buf_size - 1); + if (ERTS_IOLIST_TO_BUF_FAILED(r)) { erts_free(ERTS_ALC_T_TMP, (void *) buf); if (erts_iolist_size(*tp, &buf_size)) { goto badarg; } buf_size++; buf = erts_alloc(ERTS_ALC_T_TMP, buf_size); - r = io_list_to_buf(*tp, (char*) buf, buf_size - 1); + r = erts_iolist_to_buf(*tp, (char*) buf, buf_size - 1); ASSERT(r == buf_size - 1); } buf[buf_size - 1 - r] = '\0'; @@ -2593,6 +2591,9 @@ BIF_RETTYPE system_info_1(BIF_ALIST_1) } else if (ERTS_IS_ATOM_STR("run_queues", BIF_ARG_1)) { res = make_small(erts_no_run_queues); BIF_RET(res); + } else if (ERTS_IS_ATOM_STR("port_parallelism", BIF_ARG_1)) { + res = erts_port_parallelism ? am_true : am_false; + BIF_RET(res); } else if (ERTS_IS_ATOM_STR("c_compiler_used", BIF_ARG_1)) { Eterm *hp = NULL; Uint sz = 0; @@ -2760,65 +2761,6 @@ BIF_RETTYPE system_info_1(BIF_ALIST_1) BIF_ERROR(BIF_P, BADARG); } -BIF_RETTYPE -port_info_1(BIF_ALIST_1) -{ - Process* p = BIF_P; - Eterm pid = BIF_ARG_1; - static Eterm keys[] = { - am_name, - am_links, - am_id, - am_connected, - am_input, - am_output - }; - Eterm items[ASIZE(keys)]; - Eterm result = NIL; - Eterm reg_name; - Eterm* hp; - Uint need; - int i; - - /* - * Collect all information about the port. - */ - - for (i = 0; i < ASIZE(keys); i++) { - Eterm item; - - item = port_info(p, pid, keys[i]); - if (is_non_value(item)) { - return THE_NON_VALUE; - } - if (item == am_undefined) { - return am_undefined; - } - items[i] = item; - } - reg_name = port_info(p, pid, am_registered_name); - - /* - * Build the resulting list. - */ - - need = 2*ASIZE(keys); - if (is_tuple(reg_name)) { - need += 2; - } - hp = HAlloc(p, need); - for (i = ASIZE(keys) - 1; i >= 0; i--) { - result = CONS(hp, items[i], result); - hp += 2; - } - if (is_tuple(reg_name)) { - result = CONS(hp, reg_name, result); - } - - return result; -} - - /**********************************************************************/ /* Return information on ports */ /* Info: @@ -2830,41 +2772,20 @@ port_info_1(BIF_ALIST_1) ** output Number of bytes output to the port program */ -BIF_RETTYPE port_info_2(BIF_ALIST_2) -{ - return port_info(BIF_P, BIF_ARG_1, BIF_ARG_2); -} - -static BIF_RETTYPE port_info(Process* p, Eterm portid, Eterm item) +Eterm +erts_bld_port_info(Eterm **hpp, ErlOffHeap *ohp, Uint *szp, Port *prt, Eterm item) { - BIF_RETTYPE ret; - Port *prt; - Eterm res; - Eterm* hp; - int count; - - if (is_internal_port(portid)) - prt = erts_id2port_sflgs(portid, - p, - ERTS_PROC_LOCK_MAIN, - ERTS_PORT_SFLGS_INVALID_LOOKUP); - else if (is_atom(portid)) - erts_whereis_name(p, ERTS_PROC_LOCK_MAIN, - portid, NULL, 0, 0, &prt); - else if (is_external_port(portid) - && external_port_dist_entry(portid) == erts_this_dist_entry) - BIF_RET(am_undefined); - else { - BIF_ERROR(p, BADARG); - } + Eterm res = THE_NON_VALUE; - if (!prt) { - BIF_RET(am_undefined); - } + ERTS_SMP_LC_ASSERT(erts_lc_is_port_locked(prt)); if (item == am_id) { - hp = HAlloc(p, 3); - res = make_small(internal_port_number(portid)); + if (hpp) + res = make_small(internal_port_index(prt->common.id)); + if (szp) { + res = am_true; + goto done; + } } else if (item == am_links) { MonitorInfoCollection mic; @@ -2875,15 +2796,24 @@ static BIF_RETTYPE port_info(Process* p, Eterm portid, Eterm item) erts_doforall_links(ERTS_P_LINKS(prt), &collect_one_link, &mic); - hp = HAlloc(p, 3 + mic.sz); - res = NIL; - for (i = 0; i < mic.mi_i; i++) { - item = STORE_NC(&hp, &MSO(p), mic.mi[i].entity); - res = CONS(hp, item, res); - hp += 2; + if (szp) + *szp += mic.sz; + + if (hpp) { + res = NIL; + for (i = 0; i < mic.mi_i; i++) { + item = STORE_NC(hpp, ohp, mic.mi[i].entity); + res = CONS(*hpp, item, res); + *hpp += 2; + } } + DESTROY_MONITOR_INFOS(mic); + if (szp) { + res = am_true; + goto done; + } } else if (item == am_monitors) { MonitorInfoCollection mic; @@ -2894,64 +2824,84 @@ static BIF_RETTYPE port_info(Process* p, Eterm portid, Eterm item) erts_doforall_monitors(ERTS_P_MONITORS(prt), &collect_one_origin_monitor, &mic); - hp = HAlloc(p, 3 + mic.sz); - res = NIL; - for (i = 0; i < mic.mi_i; i++) { - Eterm t; - item = STORE_NC(&hp, &MSO(p), mic.mi[i].entity); - t = TUPLE2(hp, am_process, item); - hp += 3; - res = CONS(hp, t, res); - hp += 2; + if (szp) + *szp += mic.sz; + + if (hpp) { + res = NIL; + for (i = 0; i < mic.mi_i; i++) { + Eterm t; + item = STORE_NC(hpp, ohp, mic.mi[i].entity); + t = TUPLE2(*hpp, am_process, item); + *hpp += 3; + res = CONS(*hpp, t, res); + *hpp += 2; + } } + DESTROY_MONITOR_INFOS(mic); + if (szp) { + res = am_true; + goto done; + } } else if (item == am_name) { - count = sys_strlen(prt->name); + int count = sys_strlen(prt->name); - hp = HAlloc(p, 3 + 2*count); - res = buf_to_intlist(&hp, prt->name, count, NIL); + if (hpp) + res = buf_to_intlist(hpp, prt->name, count, NIL); + + if (szp) { + *szp += 2*count; + res = am_true; + goto done; + } } else if (item == am_connected) { - hp = HAlloc(p, 3); - res = ERTS_PORT_GET_CONNECTED(prt); /* internal pid */ + if (hpp) + res = ERTS_PORT_GET_CONNECTED(prt); /* internal pid */ + if (szp) { + res = am_true; + goto done; + } } else if (item == am_input) { - Uint hsz = 3; - Uint n = prt->bytes_in; - (void) erts_bld_uint(NULL, &hsz, n); - hp = HAlloc(p, hsz); - res = erts_bld_uint(&hp, NULL, n); + res = erts_bld_uint(hpp, szp, prt->bytes_in); + if (szp) { + res = am_true; + goto done; + } } else if (item == am_output) { - Uint hsz = 3; - Uint n = prt->bytes_out; - (void) erts_bld_uint(NULL, &hsz, n); - hp = HAlloc(p, hsz); - res = erts_bld_uint(&hp, NULL, n); + res = erts_bld_uint(hpp, szp, prt->bytes_out); + if (szp) { + res = am_true; + goto done; + } } else if (item == am_registered_name) { - RegProc *reg; - reg = prt->common.u.alive.reg; - if (reg == NULL) { - ERTS_BIF_PREP_RET(ret, NIL); - goto done; - } else { - hp = HAlloc(p, 3); + RegProc *reg = prt->common.u.alive.reg; + if (reg) { res = reg->name; + if (szp) { + res = am_true; + goto done; + } + } + else { + if (szp) + return am_undefined; + return NIL; } } else if (item == am_memory) { /* All memory consumed in bytes (the Port struct should not be included though). */ - Uint hsz = 3; Uint size = 0; ErlHeapFragment* bp; - hp = HAlloc(p, 3); - erts_doforall_links(ERTS_P_LINKS(prt), &one_link_size, &size); for (bp = prt->bp; bp; bp = bp->next) @@ -2966,52 +2916,72 @@ static BIF_RETTYPE port_info(Process* p, Eterm portid, Eterm item) /* All memory allocated by the driver should be included, but it is hard to retrieve... */ - (void) erts_bld_uint(NULL, &hsz, size); - hp = HAlloc(p, hsz); - res = erts_bld_uint(&hp, NULL, size); + res = erts_bld_uint(hpp, szp, size); + if (szp) { + res = am_true; + goto done; + } } else if (item == am_queue_size) { Uint ioq_size = erts_port_ioq_size(prt); - Uint hsz = 3; - (void) erts_bld_uint(NULL, &hsz, ioq_size); - hp = HAlloc(p, hsz); - res = erts_bld_uint(&hp, NULL, ioq_size); + res = erts_bld_uint(hpp, szp, ioq_size); + if (szp) { + res = am_true; + goto done; + } } else if (ERTS_IS_ATOM_STR("locking", item)) { - hp = HAlloc(p, 3); + if (hpp) { #ifndef ERTS_SMP - res = am_false; + res = am_false; #else - if (erts_atomic32_read_nob(&prt->state) - & ERTS_PORT_SFLG_PORT_SPECIFIC_LOCK) { - DECL_AM(port_level); - ASSERT(prt->drv_ptr->flags - & ERL_DRV_FLAG_USE_PORT_LOCKING); - res = AM_port_level; + if (erts_atomic32_read_nob(&prt->state) + & ERTS_PORT_SFLG_PORT_SPECIFIC_LOCK) { + DECL_AM(port_level); + ASSERT(prt->drv_ptr->flags + & ERL_DRV_FLAG_USE_PORT_LOCKING); + res = AM_port_level; + } + else { + DECL_AM(driver_level); + ASSERT(!(prt->drv_ptr->flags + & ERL_DRV_FLAG_USE_PORT_LOCKING)); + res = AM_driver_level; + } +#endif } - else { - DECL_AM(driver_level); - ASSERT(!(prt->drv_ptr->flags - & ERL_DRV_FLAG_USE_PORT_LOCKING)); - res = AM_driver_level; + if (szp) { + res = am_true; + goto done; } -#endif + } + else if (item == am_parallelism) { + if (szp) { + res = am_true; + goto done; + } + res = ((ERTS_PTS_FLG_PARALLELISM & + erts_smp_atomic32_read_nob(&prt->sched.flags)) + ? am_true + : am_false); } else { - ERTS_BIF_PREP_ERROR(ret, p, BADARG); - goto done; + if (szp) + return am_false; + return THE_NON_VALUE; } - ERTS_BIF_PREP_RET(ret, TUPLE2(hp, item, res)); - - done: - - erts_port_release(prt); +done: + if (szp) + *szp += 3; + if (hpp) { + res = TUPLE2(*hpp, item, res); + *hpp += 3; + } - return ret; + return res; } - BIF_RETTYPE fun_info_2(BIF_ALIST_2) { diff --git a/erts/emulator/beam/erl_bif_port.c b/erts/emulator/beam/erl_bif_port.c index 0d0733b8d0..97f147132e 100644 --- a/erts/emulator/beam/erl_bif_port.c +++ b/erts/emulator/beam/erl_bif_port.c @@ -49,9 +49,6 @@ static void free_args(char **); char *erts_default_arg0 = "default"; -static BIF_RETTYPE -port_call(Process* p, Eterm arg1, Eterm arg2, Eterm arg3); - BIF_RETTYPE open_port_2(BIF_ALIST_2) { Port *port; @@ -86,539 +83,397 @@ BIF_RETTYPE open_port_2(BIF_ALIST_2) BIF_RET(port_id); } -/**************************************************************************** - - PORT BIFS: - - port_command/2 -- replace Port ! {..., {command, Data}} - port_command(Port, Data) -> true - when port(Port), io-list(Data) - - port_control/3 -- new port_control(Port, Ctl, Data) -> Reply - port_control(Port, Ctl, Data) -> Reply - where integer(Ctl), io-list(Data), io-list(Reply) - - port_close/1 -- replace Port ! {..., close} - port_close(Port) -> true - when port(Port) - - port_connect/2 -- replace Port ! {..., {connect, Pid}} - port_connect(Port, Pid) - when port(Port), pid(Pid) - - ***************************************************************************/ - -static Port* -id_or_name2port(Process *c_p, Eterm id) +static ERTS_INLINE Port * +lookup_port(Process *c_p, Eterm id_or_name) { - Port *port; - if (is_not_atom(id)) - port = erts_id2port_sflgs(id, - c_p, - ERTS_PROC_LOCK_MAIN, - ERTS_PORT_SFLGS_INVALID_LOOKUP); + /* TODO: Implement nicer lookup in register... */ + Eterm id; + if (is_atom(id_or_name)) + id = erts_whereis_name_to_id(c_p, id_or_name); else - erts_whereis_name(c_p, ERTS_PROC_LOCK_MAIN, id, NULL, 0, 0, &port); - return port; + id = id_or_name; + return erts_port_lookup(id, ERTS_PORT_SFLGS_INVALID_LOOKUP); } -#define ERTS_PORT_COMMAND_FLAG_FORCE (((Uint32) 1) << 0) -#define ERTS_PORT_COMMAND_FLAG_NOSUSPEND (((Uint32) 1) << 1) +/* + * erts_internal:port_command/3 is used by the + * erlang:port_command/2 and erlang:port_command/3 + * BIFs. + */ -static BIF_RETTYPE -do_port_command(Process *BIF_P, Eterm arg1, Eterm arg2, Eterm arg3, - Uint32 flags) +BIF_RETTYPE erts_internal_port_command_3(BIF_ALIST_3) { BIF_RETTYPE res; - Port *p; - - /* Trace sched out before lock check wait */ - if (IS_TRACED_FL(BIF_P, F_TRACE_SCHED_PROCS)) { - trace_virtual_sched(BIF_P, am_out); - } - - if (erts_system_profile_flags.runnable_procs && erts_system_profile_flags.exclusive) { - profile_runnable_proc(BIF_P, am_inactive); - } - - p = id_or_name2port(BIF_P, arg1); - if (!p) { - if (IS_TRACED_FL(BIF_P, F_TRACE_SCHED_PROCS)) { - trace_virtual_sched(BIF_P, am_in); + Port *prt; + int flags = 0; + Eterm ref; + + if (is_not_nil(BIF_ARG_3)) { + Eterm l = BIF_ARG_3; + while (is_list(l)) { + Eterm* cons = list_val(l); + Eterm car = CAR(cons); + if (car == am_force) + flags |= ERTS_PORT_SIG_FLG_FORCE; + else if (car == am_nosuspend) + flags |= ERTS_PORT_SIG_FLG_NOSUSPEND; + else + BIF_RET(am_badarg); + l = CDR(cons); } - if (erts_system_profile_flags.runnable_procs && erts_system_profile_flags.exclusive) { - profile_runnable_proc(BIF_P, am_active); - } - BIF_ERROR(BIF_P, BADARG); + if (!is_nil(l)) + BIF_RET(am_badarg); } - - /* Trace port in, id_or_name2port causes wait */ - if (IS_TRACED_FL(p, F_TRACE_SCHED_PORTS)) { - trace_sched_ports_where(p, am_in, am_command); - } - if (erts_system_profile_flags.runnable_ports && !erts_port_is_scheduled(p)) { - profile_runnable_port(p, am_active); + prt = lookup_port(BIF_P, BIF_ARG_1); + if (!prt) + BIF_RET(am_badarg); + + if (flags & ERTS_PORT_SIG_FLG_FORCE) { + if (!(prt->drv_ptr->flags & ERL_DRV_FLAG_SOFT_BUSY)) + BIF_RET(am_notsup); } - ERTS_BIF_PREP_RET(res, am_true); +#ifdef DEBUG + ref = NIL; +#endif - if ((flags & ERTS_PORT_COMMAND_FLAG_FORCE) - && !(p->drv_ptr->flags & ERL_DRV_FLAG_SOFT_BUSY)) { - ERTS_BIF_PREP_ERROR(res, BIF_P, EXC_NOTSUP); - } - else if (!(flags & ERTS_PORT_COMMAND_FLAG_FORCE) - && (erts_smp_atomic32_read_nob(&p->sched.flags) - & ERTS_PTS_FLG_BUSY)) { - if (flags & ERTS_PORT_COMMAND_FLAG_NOSUSPEND) { + switch (erts_port_output(BIF_P, flags, prt, prt->common.id, BIF_ARG_2, &ref)) { + case ERTS_PORT_OP_CALLER_EXIT: + case ERTS_PORT_OP_BADARG: + case ERTS_PORT_OP_DROPPED: + ERTS_BIF_PREP_RET(res, am_badarg); + break; + case ERTS_PORT_OP_BUSY: + ASSERT(!(flags & ERTS_PORT_SIG_FLG_FORCE)); + if (flags & ERTS_PORT_SIG_FLG_NOSUSPEND) ERTS_BIF_PREP_RET(res, am_false); - } else { - erts_suspend(BIF_P, ERTS_PROC_LOCK_MAIN, p); - if (erts_system_monitor_flags.busy_port) { - monitor_generic(BIF_P, am_busy_port, p->common.id); - } - ERTS_BIF_PREP_YIELD3(res, bif_export[BIF_port_command_3], BIF_P, - arg1, arg2, arg3); - } - } else { - int wres; - erts_smp_proc_unlock(BIF_P, ERTS_PROC_LOCK_MAIN); - ERTS_SMP_CHK_NO_PROC_LOCKS; - wres = erts_write_to_port(BIF_P->common.id, p, arg2); - erts_smp_proc_lock(BIF_P, ERTS_PROC_LOCK_MAIN); - if (wres != 0) { - ERTS_BIF_PREP_ERROR(res, BIF_P, BADARG); + erts_suspend(BIF_P, ERTS_PROC_LOCK_MAIN, prt); + ERTS_BIF_PREP_YIELD3(res, bif_export[BIF_erts_internal_port_command_3], + BIF_P, BIF_ARG_1, BIF_ARG_2, BIF_ARG_3); } - } - - if (IS_TRACED_FL(p, F_TRACE_SCHED_PORTS)) { - trace_sched_ports_where(p, am_out, am_command); - } - if (erts_system_profile_flags.runnable_ports && !erts_port_is_scheduled(p)) { - profile_runnable_port(p, am_inactive); + break; + case ERTS_PORT_OP_BUSY_SCHEDULED: + ASSERT(!(flags & ERTS_PORT_SIG_FLG_FORCE)); + /* Fall through... */ + case ERTS_PORT_OP_SCHEDULED: + ASSERT(is_internal_ref(ref)); + ERTS_BIF_PREP_RET(res, ref); + break; + case ERTS_PORT_OP_DONE: + ERTS_BIF_PREP_RET(res, am_true); + break; + default: + ERTS_INTERNAL_ERROR("Unexpected erts_port_output() result"); + break; } - erts_port_release(p); - /* Trace sched in after port release */ - if (IS_TRACED_FL(BIF_P, F_TRACE_SCHED_PROCS)) { - trace_virtual_sched(BIF_P, am_in); - } - if (erts_system_profile_flags.runnable_procs && erts_system_profile_flags.exclusive) { - profile_runnable_proc(BIF_P, am_active); - } - if (ERTS_PROC_IS_EXITING(BIF_P)) { KILL_CATCHES(BIF_P); /* Must exit */ ERTS_BIF_PREP_ERROR(res, BIF_P, EXC_ERROR); } - return res; -} -BIF_RETTYPE port_command_2(BIF_ALIST_2) -{ - return do_port_command(BIF_P, BIF_ARG_1, BIF_ARG_2, NIL, 0); + return res; } -BIF_RETTYPE port_command_3(BIF_ALIST_3) +BIF_RETTYPE erts_internal_port_call_3(BIF_ALIST_3) { - Eterm l = BIF_ARG_3; - Uint32 flags = 0; - while (is_list(l)) { - Eterm* cons = list_val(l); - Eterm car = CAR(cons); - if (car == am_force) { - flags |= ERTS_PORT_COMMAND_FLAG_FORCE; - } else if (car == am_nosuspend) { - flags |= ERTS_PORT_COMMAND_FLAG_NOSUSPEND; - } else { - BIF_ERROR(BIF_P, BADARG); - } - l = CDR(cons); - } - if(!is_nil(l)) { - BIF_ERROR(BIF_P, BADARG); + Port* prt; + Eterm retval; + Uint uint_op; + unsigned int op; + erts_aint32_t state; + + prt = lookup_port(BIF_P, BIF_ARG_1); + if (!prt) + BIF_RET(am_badarg); + + if (!term_to_Uint(BIF_ARG_2, &uint_op)) + BIF_RET(am_badarg); + + if (uint_op > (Uint) UINT_MAX) + BIF_RET(am_badarg); + + op = (unsigned int) uint_op; + + switch (erts_port_call(BIF_P, prt, op, BIF_ARG_3, &retval)) { + case ERTS_PORT_OP_CALLER_EXIT: + case ERTS_PORT_OP_DROPPED: + case ERTS_PORT_OP_BADARG: + retval = am_badarg; + break; + case ERTS_PORT_OP_SCHEDULED: + ASSERT(is_internal_ref(retval)); + break; + case ERTS_PORT_OP_DONE: + ASSERT(is_not_internal_ref(retval)); + break; + default: + ERTS_INTERNAL_ERROR("Unexpected erts_port_call() result"); + retval = am_internal_error; + break; } - return do_port_command(BIF_P, BIF_ARG_1, BIF_ARG_2, BIF_ARG_3, flags); -} -BIF_RETTYPE port_call_2(BIF_ALIST_2) -{ - return port_call(BIF_P,BIF_ARG_1, make_small(0), BIF_ARG_2); -} + state = erts_smp_atomic32_read_acqb(&BIF_P->state); + if (state & (ERTS_PSFLG_EXITING|ERTS_PSFLG_PENDING_EXIT)) { +#ifdef ERTS_SMP + if (state & ERTS_PSFLG_PENDING_EXIT) + erts_handle_pending_exit(BIF_P, ERTS_PROC_LOCK_MAIN); +#endif + ERTS_BIF_EXITED(BIF_P); + } -BIF_RETTYPE port_call_3(BIF_ALIST_3) -{ - return port_call(BIF_P, BIF_ARG_1, BIF_ARG_2, BIF_ARG_3); + BIF_RET(retval); } -static BIF_RETTYPE -port_call(Process* c_p, Eterm arg1, Eterm arg2, Eterm arg3) +BIF_RETTYPE erts_internal_port_control_3(BIF_ALIST_3) { - Uint op; - Port *p; - Uint size; - byte *bytes; - byte *endp; - ErlDrvSizeT real_size; - erts_driver_t *drv; - byte port_input[256]; /* Default input buffer to encode in */ - byte port_result[256]; /* Buffer for result from port. */ - byte* port_resp; /* Pointer to result buffer. */ - char *prc; - ErlDrvSSizeT ret; - Eterm res; - Sint result_size; - Eterm *hp; - Eterm *hp_end; /* To satisfy hybrid heap architecture */ - unsigned ret_flags = 0U; - int fpe_was_unmasked; - - bytes = &port_input[0]; - port_resp = port_result; - /* trace of port scheduling with virtual process descheduling - * lock wait - */ - 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); + Port* prt; + Eterm retval; + Uint uint_op; + unsigned int op; + erts_aint32_t state; + + prt = lookup_port(BIF_P, BIF_ARG_1); + if (!prt) + BIF_RET(am_badarg); + + if (!term_to_Uint(BIF_ARG_2, &uint_op)) + BIF_RET(am_badarg); + + if (uint_op > (Uint) UINT_MAX) + BIF_RET(am_badarg); + + op = (unsigned int) uint_op; + + switch (erts_port_control(BIF_P, prt, op, BIF_ARG_3, &retval)) { + case ERTS_PORT_OP_CALLER_EXIT: + case ERTS_PORT_OP_BADARG: + case ERTS_PORT_OP_DROPPED: + retval = am_badarg; + break; + case ERTS_PORT_OP_SCHEDULED: + ASSERT(is_internal_ref(retval)); + break; + case ERTS_PORT_OP_DONE: + ASSERT(is_not_internal_ref(retval)); + break; + default: + ERTS_INTERNAL_ERROR("Unexpected erts_port_control() result"); + retval = am_internal_error; + break; } - p = id_or_name2port(c_p, arg1); - if (!p) { - error: - if (port_resp != port_result && - !(ret_flags & DRIVER_CALL_KEEP_BUFFER)) { - driver_free(port_resp); - } - if (bytes != &port_input[0]) - erts_free(ERTS_ALC_T_PORT_CALL_BUF, bytes); - /* Need to virtual schedule in the process if there - * was an error. - */ - 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); - } - - if (p) - erts_port_release(p); + state = erts_smp_atomic32_read_acqb(&BIF_P->state); + if (state & (ERTS_PSFLG_EXITING|ERTS_PSFLG_PENDING_EXIT)) { #ifdef ERTS_SMP - ERTS_SMP_BIF_CHK_PENDING_EXIT(c_p, ERTS_PROC_LOCK_MAIN); -#else - ERTS_BIF_CHK_EXITED(c_p); + if (state & ERTS_PSFLG_PENDING_EXIT) + erts_handle_pending_exit(BIF_P, ERTS_PROC_LOCK_MAIN); #endif - BIF_ERROR(c_p, BADARG); + ERTS_BIF_EXITED(BIF_P); } - if ((drv = p->drv_ptr) == NULL) { - goto error; - } - if (drv->call == NULL) { - goto error; - } - if (!term_to_Uint(arg2, &op)) { - goto error; - } - p->caller = c_p->common.id; - - /* Lock taken, virtual schedule of port */ - if (IS_TRACED_FL(p, F_TRACE_SCHED_PORTS)) { - trace_sched_ports_where(p, am_in, am_call); - } - - if (erts_system_profile_flags.runnable_ports && !erts_port_is_scheduled(p)) { - profile_runnable_port(p, am_active); - } - size = erts_encode_ext_size(arg3); - if (size > sizeof(port_input)) - bytes = erts_alloc(ERTS_ALC_T_PORT_CALL_BUF, size); - - endp = bytes; - erts_encode_ext(arg3, &endp); + BIF_RET(retval); +} - real_size = endp - bytes; - if (real_size > size) { - erl_exit(1, "%s, line %d: buffer overflow: %d word(s)\n", - __FILE__, __LINE__, endp - (bytes + size)); - } - erts_smp_proc_unlock(c_p, ERTS_PROC_LOCK_MAIN); -#ifdef USE_VM_PROBES - if (DTRACE_ENABLED(driver_call)) { - DTRACE_CHARBUF(process_str, DTRACE_TERM_BUF_SIZE); - DTRACE_CHARBUF(port_str, DTRACE_TERM_BUF_SIZE); +/* + * erts_internal:port_close/1 is used by the + * erlang:port_close/1 BIF. + */ +BIF_RETTYPE erts_internal_port_close_1(BIF_ALIST_1) +{ + Eterm ref; + Port *prt; - dtrace_pid_str(ERTS_PORT_GET_CONNECTED(p), process_str); - dtrace_port_str(p, port_str); - DTRACE5(driver_call, process_str, port_str, p->name, op, real_size); - } -#endif - prc = (char *) port_resp; - fpe_was_unmasked = erts_block_fpe(); - ret = drv->call((ErlDrvData)p->drv_data, - (unsigned) op, - (char *) bytes, - (int) real_size, - &prc, - (int) sizeof(port_result), - &ret_flags); - erts_unblock_fpe(fpe_was_unmasked); - if (IS_TRACED_FL(p, F_TRACE_SCHED_PORTS)) { - trace_sched_ports_where(p, am_out, am_call); - } - - if (erts_system_profile_flags.runnable_ports && !erts_port_is_scheduled(p)) { - profile_runnable_port(p, am_inactive); - } - - port_resp = (byte *) prc; - p->caller = NIL; - erts_smp_proc_lock(c_p, ERTS_PROC_LOCK_MAIN); -#ifdef HARDDEBUG - { - ErlDrvSizeT z; - printf("real_size = %ld,%d, ret = %ld,%d\r\n", (unsigned long) real_size, - (int) real_size, (unsigned long)ret, (int) ret); - printf("["); - for(z = 0; z < real_size; ++z) { - printf("%d, ",(int) bytes[z]); - } - printf("]\r\n"); - printf("["); - for(z = 0; z < ret; ++z) { - printf("%d, ",(int) port_resp[z]); - } - printf("]\r\n"); - } -#endif - if (ret <= 0 || port_resp[0] != VERSION_MAGIC) { - /* Error or a binary without magic/ with wrong magic */ - goto error; - } - result_size = erts_decode_ext_size(port_resp, ret); - if (result_size < 0) { - goto error; - } - hp = HAlloc(c_p, result_size); - hp_end = hp + result_size; - endp = port_resp; - res = erts_decode_ext(&hp, &MSO(c_p), &endp); - if (res == THE_NON_VALUE) { - goto error; - } - HRelease(c_p, hp_end, hp); - if (port_resp != port_result && !(ret_flags & DRIVER_CALL_KEEP_BUFFER)) { - driver_free(port_resp); - } - if (bytes != &port_input[0]) - erts_free(ERTS_ALC_T_PORT_CALL_BUF, bytes); - if (p) - erts_port_release(p); -#ifdef ERTS_SMP - ERTS_SMP_BIF_CHK_PENDING_EXIT(c_p, ERTS_PROC_LOCK_MAIN); -#else - ERTS_BIF_CHK_EXITED(c_p); +#ifdef DEBUG + ref = NIL; #endif - 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); + prt = lookup_port(BIF_P, BIF_ARG_1); + if (!prt) + BIF_RET(am_badarg); + + + switch (erts_port_exit(BIF_P, 0, prt, prt->common.id, am_normal, &ref)) { + case ERTS_PORT_OP_CALLER_EXIT: + case ERTS_PORT_OP_BADARG: + case ERTS_PORT_OP_DROPPED: + BIF_RET(am_badarg); + case ERTS_PORT_OP_SCHEDULED: + ASSERT(is_internal_ref(ref)); + BIF_RET(ref); + case ERTS_PORT_OP_DONE: + BIF_RET(am_true); + default: + ERTS_INTERNAL_ERROR("Unexpected erts_port_exit() result"); + BIF_RET(am_internal_error); } - - return res; } - -BIF_RETTYPE port_control_3(BIF_ALIST_3) + +/* + * erts_internal:port_connect/2 is used by the + * erlang:port_connect/2 BIF. + */ +BIF_RETTYPE erts_internal_port_connect_2(BIF_ALIST_2) { - Port* p; - Uint op; - Eterm res = THE_NON_VALUE; - - /* Virtual schedule out calling process before lock wait */ - if (IS_TRACED_FL(BIF_P, F_TRACE_SCHED_PROCS)) { - trace_virtual_sched(BIF_P, am_out); - } + Eterm ref; + Port* prt; - if (erts_system_profile_flags.runnable_procs && erts_system_profile_flags.exclusive) { - profile_runnable_proc(BIF_P, am_inactive); - } + prt = lookup_port(BIF_P, BIF_ARG_1); + if (!prt) + BIF_RET(am_badarg); - p = id_or_name2port(BIF_P, BIF_ARG_1); - if (!p) { - /* Schedule the process before exiting */ - if (IS_TRACED_FL(BIF_P, F_TRACE_SCHED_PROCS)) { - trace_virtual_sched(BIF_P, am_in); - } - - if (erts_system_profile_flags.runnable_procs && erts_system_profile_flags.exclusive) { - profile_runnable_proc(BIF_P, am_active); - } - - BIF_ERROR(BIF_P, BADARG); - } - - /* Trace the port for scheduling in */ - if (IS_TRACED_FL(p, F_TRACE_SCHED_PORTS)) { - trace_sched_ports_where(p, am_in, am_control); - } - - if (erts_system_profile_flags.runnable_ports && !erts_port_is_scheduled(p)) { - profile_runnable_port(p, am_active); - } +#ifdef DEBUG + ref = NIL; +#endif - if (term_to_Uint(BIF_ARG_2, &op)) - res = erts_port_control(BIF_P, p, op, BIF_ARG_3); - - /* Trace the port for scheduling out */ - if (IS_TRACED_FL(p, F_TRACE_SCHED_PORTS)) { - trace_sched_ports_where(p, am_out, am_control); + switch (erts_port_connect(BIF_P, 0, prt, prt->common.id, BIF_ARG_2, &ref)) { + case ERTS_PORT_OP_CALLER_EXIT: + case ERTS_PORT_OP_BADARG: + case ERTS_PORT_OP_DROPPED: + BIF_RET(am_badarg); + case ERTS_PORT_OP_SCHEDULED: + ASSERT(is_internal_ref(ref)); + BIF_RET(ref); + break; + case ERTS_PORT_OP_DONE: + BIF_RET(am_true); + break; + default: + ERTS_INTERNAL_ERROR("Unexpected erts_port_connect() result"); + BIF_RET(am_internal_error); } +} - if (erts_system_profile_flags.runnable_ports && !erts_port_is_scheduled(p)) { - profile_runnable_port(p, am_inactive); - } +BIF_RETTYPE erts_internal_port_info_1(BIF_ALIST_1) +{ + Eterm retval; + Port* prt; - erts_port_release(p); -#ifdef ERTS_SMP - ERTS_SMP_BIF_CHK_PENDING_EXIT(BIF_P, ERTS_PROC_LOCK_MAIN); -#else - ERTS_BIF_CHK_EXITED(BIF_P); -#endif - - if (IS_TRACED_FL(BIF_P, F_TRACE_SCHED_PROCS)) { - trace_virtual_sched(BIF_P, am_in); + if (is_internal_port(BIF_ARG_1) || is_atom(BIF_ARG_1)) { + prt = lookup_port(BIF_P, BIF_ARG_1); + if (!prt) + BIF_RET(am_undefined); } - - if (erts_system_profile_flags.runnable_procs && erts_system_profile_flags.exclusive) { - profile_runnable_proc(BIF_P, am_active); + else if (is_external_port(BIF_ARG_1)) { + if (external_port_dist_entry(BIF_ARG_1) == erts_this_dist_entry) + BIF_RET(am_undefined); + else + BIF_RET(am_badarg); } - - if (is_non_value(res)) { - BIF_ERROR(BIF_P, BADARG); + else { + BIF_RET(am_badarg); + } + + switch (erts_port_info(BIF_P, prt, THE_NON_VALUE, &retval)) { + case ERTS_PORT_OP_CALLER_EXIT: + case ERTS_PORT_OP_BADARG: + BIF_RET(am_badarg); + case ERTS_PORT_OP_DROPPED: + BIF_RET(am_undefined); + case ERTS_PORT_OP_SCHEDULED: + ASSERT(is_internal_ref(retval)); + BIF_RET(retval); + case ERTS_PORT_OP_DONE: + ASSERT(is_not_internal_ref(retval)); + BIF_RET(retval); + default: + ERTS_INTERNAL_ERROR("Unexpected erts_port_info() result"); + BIF_RET(am_internal_error); } - BIF_RET(res); } -BIF_RETTYPE port_close_1(BIF_ALIST_1) -{ - Port* p; - erts_smp_proc_unlock(BIF_P, ERTS_PROC_LOCK_MAIN); - p = id_or_name2port(NULL, BIF_ARG_1); - if (!p) { - erts_smp_proc_lock(BIF_P, ERTS_PROC_LOCK_MAIN); - BIF_ERROR(BIF_P, BADARG); - } - erts_do_exit_port(p, ERTS_PORT_GET_CONNECTED(p), am_normal); - /* if !ERTS_SMP: since we terminate port with reason normal - we SHOULD never get an exit signal ourselves - */ - erts_port_release(p); - erts_smp_proc_lock(BIF_P, ERTS_PROC_LOCK_MAIN); - BIF_RET(am_true); -} -BIF_RETTYPE port_connect_2(BIF_ALIST_2) +BIF_RETTYPE erts_internal_port_info_2(BIF_ALIST_2) { + Eterm retval; Port* prt; - Process* rp; - Eterm pid = BIF_ARG_2; - if (is_not_internal_pid(pid)) { - error: - BIF_ERROR(BIF_P, BADARG); - } - prt = id_or_name2port(BIF_P, BIF_ARG_1); - if (!prt) { - goto error; + if (is_internal_port(BIF_ARG_1) || is_atom(BIF_ARG_1)) { + prt = lookup_port(BIF_P, BIF_ARG_1); + if (!prt) + BIF_RET(am_undefined); } - - rp = erts_pid2proc(BIF_P, ERTS_PROC_LOCK_MAIN, - pid, ERTS_PROC_LOCK_LINK); - if (!rp) { - erts_port_release(prt); - ERTS_SMP_ASSERT_IS_NOT_EXITING(BIF_P); - goto error; + else if (is_external_port(BIF_ARG_1)) { + if (external_port_dist_entry(BIF_ARG_1) == erts_this_dist_entry) + BIF_RET(am_undefined); + else + BIF_RET(am_badarg); } - - erts_add_link(&ERTS_P_LINKS(rp), LINK_PID, prt->common.id); - erts_add_link(&ERTS_P_LINKS(prt), LINK_PID, pid); - - erts_smp_proc_unlock(rp, ERTS_PROC_LOCK_LINK); - - ERTS_PORT_SET_CONNECTED_RELB(prt, pid); /* internal pid */ - erts_port_release(prt); -#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(pid, process_str); - erts_snprintf(port_str, sizeof(port_str), "%T", prt->id); - dtrace_proc_str(rp, newprocess_str); - DTRACE4(port_connect, process_str, port_str, prt->name, newprocess_str); + else { + BIF_RET(am_badarg); + } + + switch (erts_port_info(BIF_P, prt, BIF_ARG_2, &retval)) { + case ERTS_PORT_OP_CALLER_EXIT: + case ERTS_PORT_OP_BADARG: + BIF_RET(am_badarg); + case ERTS_PORT_OP_DROPPED: + BIF_RET(am_undefined); + case ERTS_PORT_OP_SCHEDULED: + ASSERT(is_internal_ref(retval)); + BIF_RET(retval); + case ERTS_PORT_OP_DONE: + ASSERT(is_not_internal_ref(retval)); + BIF_RET(retval); + default: + ERTS_INTERNAL_ERROR("Unexpected erts_port_info() result"); + BIF_RET(am_internal_error); } -#endif - BIF_RET(am_true); } -BIF_RETTYPE port_set_data_2(BIF_ALIST_2) + +BIF_RETTYPE erts_internal_port_set_data_2(BIF_ALIST_2) { + Eterm ref; Port* prt; - Eterm portid = BIF_ARG_1; - Eterm data = BIF_ARG_2; - prt = id_or_name2port(BIF_P, portid); - if (!prt) { - BIF_ERROR(BIF_P, BADARG); - } - if (prt->bp != NULL) { - free_message_buffer(prt->bp); - prt->bp = NULL; - } - if (IS_CONST(data)) { - prt->data = data; - } else { - Uint size; - ErlHeapFragment* bp; - Eterm* hp; - - size = size_object(data); - prt->bp = bp = new_message_buffer(size); - hp = bp->mem; - prt->data = copy_struct(data, size, &hp, &bp->off_heap); + prt = lookup_port(BIF_P, BIF_ARG_1); + if (!prt) + BIF_RET(am_badarg); + + switch (erts_port_set_data(BIF_P, prt, BIF_ARG_2, &ref)) { + case ERTS_PORT_OP_CALLER_EXIT: + case ERTS_PORT_OP_BADARG: + case ERTS_PORT_OP_DROPPED: + BIF_RET(am_badarg); + case ERTS_PORT_OP_SCHEDULED: + ASSERT(is_internal_ref(ref)); + BIF_RET(ref); + case ERTS_PORT_OP_DONE: + BIF_RET(am_true); + default: + ERTS_INTERNAL_ERROR("Unexpected erts_port_set_data() result"); + BIF_RET(am_internal_error); } - erts_port_release(prt); - BIF_RET(am_true); } -BIF_RETTYPE port_get_data_1(BIF_ALIST_1) +BIF_RETTYPE erts_internal_port_get_data_1(BIF_ALIST_1) { - BIF_RETTYPE res; + Eterm retval; Port* prt; - Eterm portid = BIF_ARG_1; - prt = id_or_name2port(BIF_P, portid); - if (!prt) { - BIF_ERROR(BIF_P, BADARG); - } - if (prt->bp == NULL) { /* MUST be CONST! */ - res = prt->data; - } else { - Eterm* hp = HAlloc(BIF_P, prt->bp->used_size); - res = copy_struct(prt->data, prt->bp->used_size, &hp, &MSO(BIF_P)); + prt = lookup_port(BIF_P, BIF_ARG_1); + if (!prt) + BIF_RET(am_badarg); + + switch (erts_port_get_data(BIF_P, prt, &retval)) { + case ERTS_PORT_OP_CALLER_EXIT: + case ERTS_PORT_OP_BADARG: + case ERTS_PORT_OP_DROPPED: + BIF_RET(am_badarg); + case ERTS_PORT_OP_SCHEDULED: + ASSERT(is_internal_ref(retval)); + BIF_RET(retval); + case ERTS_PORT_OP_DONE: + ASSERT(is_not_internal_ref(retval)); + BIF_RET(retval); + default: + ERTS_INTERNAL_ERROR("Unexpected erts_port_get_data() result"); + BIF_RET(am_internal_error); } - erts_port_release(prt); - BIF_RET(res); } /* @@ -659,6 +514,7 @@ open_port(Process* p, Eterm name, Eterm settings, int *err_typep, int *err_nump) opts.overlapped_io = 0; opts.spawn_type = ERTS_SPAWN_ANY; opts.argv = NULL; + opts.parallelism = erts_port_parallelism; linebuf = 0; *err_nump = 0; @@ -736,6 +592,13 @@ open_port(Process* p, Eterm name, Eterm settings, int *err_typep, int *err_nump) } } else if (option == am_cd) { edir = *tp; + } else if (option == am_parallelism) { + if (*tp == am_true) + opts.parallelism = 1; + else if (*tp == am_false) + opts.parallelism = 0; + else + goto badarg; } else { goto badarg; } @@ -904,9 +767,9 @@ open_port(Process* p, Eterm name, Eterm settings, int *err_typep, int *err_nump) heap[2] = make_small(0); heap[3] = NIL; iolist = make_list(heap); - r = io_list_to_buf(iolist, (char*) dir, MAXPATHLEN); + r = erts_iolist_to_buf(iolist, (char*) dir, MAXPATHLEN); UnUseTmpHeap(4,p); - if (r < 0) { + if (ERTS_IOLIST_TO_BUF_FAILED(r)) { goto badarg; } opts.wd = (char *) dir; @@ -1035,7 +898,7 @@ static byte* convert_environment(Process* p, Eterm env) Eterm* hp; Uint heap_size; int n; - Uint size; + ErlDrvSizeT size; byte* bytes; if ((n = list_length(env)) < 0) { @@ -1087,7 +950,7 @@ static byte* convert_environment(Process* p, Eterm env) * Put the result in a binary (no risk for a memory leak that way). */ (void) erts_new_heap_binary(p, NULL, size, &bytes); - io_list_to_buf(all, (char*)bytes, size); + erts_iolist_to_buf(all, (char*)bytes, size); done: erts_free(ERTS_ALC_T_TMP, temp_heap); diff --git a/erts/emulator/beam/erl_bif_re.c b/erts/emulator/beam/erl_bif_re.c index 6b843d2e08..ace128f045 100644 --- a/erts/emulator/beam/erl_bif_re.c +++ b/erts/emulator/beam/erl_bif_re.c @@ -418,7 +418,7 @@ build_compile_result(Process *p, Eterm error_tag, pcre *result, int errcode, con static BIF_RETTYPE re_compile(Process* p, Eterm arg1, Eterm arg2) { - Uint slen; + ErlDrvSizeT slen; char *expr; pcre *result; int errcode = 0; @@ -449,7 +449,7 @@ re_compile(Process* p, Eterm arg1, Eterm arg2) BIF_ERROR(p,BADARG); } expr = erts_alloc(ERTS_ALC_T_RE_TMP_BUF, slen + 1); - if (io_list_to_buf(arg1, expr, slen) != 0) { + if (erts_iolist_to_buf(arg1, expr, slen) != 0) { erts_free(ERTS_ALC_T_RE_TMP_BUF, expr); BIF_ERROR(p,BADARG); } @@ -802,7 +802,7 @@ build_capture(Eterm capture_spec[CAPSPEC_SIZE], const pcre *code) memcpy(tmpb,ap->name,ap->len); tmpb[ap->len] = '\0'; } else { - Uint slen; + ErlDrvSizeT slen; if (erts_iolist_size(val, &slen)) { goto error; } @@ -814,7 +814,7 @@ build_capture(Eterm capture_spec[CAPSPEC_SIZE], const pcre *code) (tmpbsiz = slen + 1)); } } - if (io_list_to_buf(val, tmpb, slen) != 0) { + if (erts_iolist_to_buf(val, tmpb, slen) != 0) { goto error; } tmpb[slen] = '\0'; @@ -858,7 +858,7 @@ re_run(Process *p, Eterm arg1, Eterm arg2, Eterm arg3) const pcre *code_tmp; RestartContext restart; byte *temp_alloc = NULL; - Uint slength; + ErlDrvSizeT slength; int startoffset = 0; int options = 0, comp_options = 0; int ovsize; @@ -882,7 +882,7 @@ re_run(Process *p, Eterm arg1, Eterm arg2, Eterm arg3) if (is_not_tuple(arg2) || (arityval(*tuple_val(arg2)) != 4)) { if (is_binary(arg2) || is_list(arg2) || is_nil(arg2)) { /* Compile from textual RE */ - Uint slen; + ErlDrvSizeT slen; char *expr; pcre *result; int errcode = 0; @@ -901,7 +901,7 @@ re_run(Process *p, Eterm arg1, Eterm arg2, Eterm arg3) } expr = erts_alloc(ERTS_ALC_T_RE_TMP_BUF, slen + 1); - if (io_list_to_buf(arg2, expr, slen) != 0) { + if (erts_iolist_to_buf(arg2, expr, slen) != 0) { erts_free(ERTS_ALC_T_RE_TMP_BUF, expr); BIF_ERROR(p,BADARG); } @@ -1044,7 +1044,7 @@ handle_iolist: } restart.subject = erts_alloc(ERTS_ALC_T_RE_SUBJECT, slength); - if (io_list_to_buf(arg1, restart.subject, slength) != 0) { + if (erts_iolist_to_buf(arg1, restart.subject, slength) != 0) { erts_free(ERTS_ALC_T_RE_SUBJECT, restart.ovector); erts_free(ERTS_ALC_T_RE_SUBJECT, restart.code); erts_free(ERTS_ALC_T_RE_SUBJECT, restart.subject); diff --git a/erts/emulator/beam/erl_init.c b/erts/emulator/beam/erl_init.c index f83e380b02..af7c2b91a0 100644 --- a/erts/emulator/beam/erl_init.c +++ b/erts/emulator/beam/erl_init.c @@ -564,7 +564,8 @@ void erts_usage(void) /* erts_fprintf(stderr, "-i module set the boot module (default init)\n"); */ erts_fprintf(stderr, "-K boolean enable or disable kernel poll\n"); - + erts_fprintf(stderr, "-n[s|a|d] Control behavior of signals to ports\n"); + erts_fprintf(stderr, " Note that this flag is deprecated!\n"); erts_fprintf(stderr, "-M memory allocator switches,\n"); erts_fprintf(stderr, " see the erts_alloc(3) documentation for more info.\n"); @@ -592,6 +593,7 @@ void erts_usage(void) erts_fprintf(stderr, " valid range is [%d-%d]\n", ERTS_SCHED_THREAD_MIN_STACK_SIZE, ERTS_SCHED_THREAD_MAX_STACK_SIZE); + erts_fprintf(stderr, "-spp Bool set port parallelism scheduling hint\n"); erts_fprintf(stderr, "-S n1:n2 set number of schedulers (n1), and number of\n"); erts_fprintf(stderr, " schedulers online (n2), valid range for both\n"); erts_fprintf(stderr, " numbers are [1-%d]\n", @@ -1228,6 +1230,30 @@ erl_start(int argc, char **argv) arg); break; + case 'n': + arg = get_arg(argv[i]+2, argv[i+1], &i); + switch (arg[0]) { + case 's': /* synchronous */ + erts_port_synchronous_ops = 1; + erts_port_schedule_all_ops = 0; + break; + case 'a': /* asynchronous */ + erts_port_synchronous_ops = 0; + erts_port_schedule_all_ops = 1; + break; + case 'd': /* Default - schedule on conflict (asynchronous) */ + erts_port_synchronous_ops = 0; + erts_port_schedule_all_ops = 0; + break; + default: + bad_n_option: + erts_fprintf(stderr, "bad -n option %s\n", arg); + erts_usage(); + } + if (arg[1] != '\0') + goto bad_n_option; + break; + case 'P': /* set maximum number of processes */ arg = get_arg(argv[i]+2, argv[i+1], &i); errno = 0; @@ -1342,6 +1368,19 @@ erl_start(int argc, char **argv) erts_usage(); } } + else if (has_prefix("pp", sub_param)) { + arg = get_arg(sub_param+2, argv[i+1], &i); + if (sys_strcmp(arg, "true") == 0) + erts_port_parallelism = 1; + else if (sys_strcmp(arg, "false") == 0) + erts_port_parallelism = 0; + else { + erts_fprintf(stderr, + "bad port parallelism scheduling hint %s\n", + arg); + erts_usage(); + } + } else if (sys_strcmp("nsp", sub_param) == 0) erts_use_sender_punish = 0; else if (sys_strcmp("wt", sub_param) == 0) { @@ -1467,8 +1506,6 @@ erl_start(int argc, char **argv) } break; } - case 'n': /* XXX obsolete */ - break; case 'c': if (argv[i][2] == 0) { /* -c: documented option */ erts_disable_tolerant_timeofday = 1; diff --git a/erts/emulator/beam/erl_nif.c b/erts/emulator/beam/erl_nif.c index 8ef6e8f846..04721cee7c 100644 --- a/erts/emulator/beam/erl_nif.c +++ b/erts/emulator/beam/erl_nif.c @@ -501,7 +501,7 @@ int enif_inspect_iolist_as_binary(ErlNifEnv* env, Eterm term, ErlNifBinary* bin) { struct enif_tmp_obj_t* tobj; ErtsAlcType_t allocator; - Uint sz; + ErlDrvSizeT sz; if (is_binary(term)) { return enif_inspect_binary(env,term,bin); } @@ -527,7 +527,7 @@ int enif_inspect_iolist_as_binary(ErlNifEnv* env, Eterm term, ErlNifBinary* bin) bin->size = sz; bin->bin_term = THE_NON_VALUE; bin->ref_bin = NULL; - io_list_to_buf(term, (char*) bin->data, sz); + erts_iolist_to_buf(term, (char*) bin->data, sz); ADD_READONLY_CHECK(env, bin->data, bin->size); return 1; } diff --git a/erts/emulator/beam/erl_port.h b/erts/emulator/beam/erl_port.h index 6ad92dcd7d..beeddd09a0 100644 --- a/erts/emulator/beam/erl_port.h +++ b/erts/emulator/beam/erl_port.h @@ -20,6 +20,7 @@ #ifndef ERL_PORT_TYPE__ #define ERL_PORT_TYPE__ typedef struct _erl_drv_port Port; +typedef struct ErtsProc2PortSigData_ ErtsProc2PortSigData; #endif #if !defined(ERL_PORT_H__) && !defined(ERL_PORT_GET_PORT_TYPE_ONLY__) @@ -33,6 +34,10 @@ typedef struct _erl_drv_port Port; #define ERTS_DEFAULT_MAX_PORTS (1 << 16) #define ERTS_MIN_PORTS 1024 +extern int erts_port_synchronous_ops; +extern int erts_port_schedule_all_ops; +extern int erts_port_parallelism; + typedef struct erts_driver_t_ erts_driver_t; #define ERTS_INVALID_ERL_DRV_PORT ((ErlDrvPort) (SWord) -1) @@ -63,6 +68,19 @@ typedef struct line_buf { /* Buffer used in line oriented I/O */ The rest is the overflow buffer. */ } LineBuf; +/* + * Items part of erlang:port_info/1 result. Note am_registered_name + * *need* to be first. + */ + +#define ERTS_PORT_INFO_1_ITEMS \ + { am_registered_name, /* Needs to be first */ \ + am_name, \ + am_links, \ + am_id, \ + am_connected, \ + am_input, \ + am_output } /* * Port Specific Data. @@ -113,7 +131,7 @@ struct _erl_drv_port { erts_atomic32_t refc; int cleanup; #endif - erts_smp_atomic_t connected;/* A connected process */ + erts_atomic_t connected; /* A connected process */ Eterm caller; /* Current caller. */ Eterm data; /* Data associated with port. */ ErlHeapFragment* bp; /* Heap fragment holding data (NULL if imm data). */ @@ -135,6 +153,13 @@ struct _erl_drv_port { ErtsPrtSD *psd; /* Port specific data */ }; +#define ERTS_PORT_GET_CONNECTED(PRT) \ + ((Eterm) erts_atomic_read_nob(&(PRT)->connected)) +#define ERTS_PORT_SET_CONNECTED(PRT, PID) \ + erts_atomic_set_relb(&(PRT)->connected, (erts_aint_t) (PID)) +#define ERTS_PORT_INIT_CONNECTED(PRT, PID) \ + erts_atomic_init_nob(&(PRT)->connected, (erts_aint_t) (PID)) + struct erl_drv_port_data_lock { erts_mtx_t mtx; @@ -240,6 +265,7 @@ extern erts_smp_atomic_t erts_bytes_in; /* no bytes sent into the system */ (ERTS_PORT_SFLGS_DEAD | ERTS_PORT_SFLG_INVALID) #define ERTS_PORT_SFLGS_INVALID_LOOKUP \ (ERTS_PORT_SFLGS_INVALID_DRIVER_LOOKUP \ + | ERTS_PORT_SFLG_EXITING \ | ERTS_PORT_SFLG_CLOSING) #define ERTS_PORT_SFLGS_INVALID_TRACER_LOOKUP \ (ERTS_PORT_SFLGS_INVALID_LOOKUP \ @@ -358,17 +384,6 @@ erts_smp_port_unlock(Port *prt) #define ERTS_PORT_SCHED_ID(P, ID) \ ((Uint) (UWord) erts_prtsd_set((P), ERTS_PSD_SCHED_ID, (void *) (UWord) (ID))) -#define ERTS_PORT_INIT_CONNECTED(PRT, PID) \ - erts_smp_atomic_init_nob(&(PRT)->connected, (erts_aint_t) (PID)) -#define ERTS_PORT_SET_CONNECTED(PRT, PID) \ - erts_smp_atomic_set_nob(&(PRT)->connected, (erts_aint_t) (PID)) -#define ERTS_PORT_SET_CONNECTED_RELB(PRT, PID) \ - erts_smp_atomic_set_relb(&(PRT)->connected, (erts_aint_t) (PID)) -#define ERTS_PORT_GET_CONNECTED(PRT) \ - ((Eterm) erts_smp_atomic_read_nob(&(PRT)->connected)) -#define ERTS_PORT_GET_CONNECTED_ACQB(PRT) \ - ((Eterm) erts_smp_atomic_read_acqb(&(PRT)->connected)) - extern const Port erts_invalid_port; #define ERTS_PORT_LOCK_BUSY ((Port *) &erts_invalid_port) @@ -424,8 +439,11 @@ ERTS_GLB_INLINE Port * erts_port_lookup(Eterm id, Uint32 invalid_sflgs) { Port *prt = erts_port_lookup_raw(id); - erts_aint32_t state = erts_atomic32_read_nob(&prt->state); - return (state & invalid_sflgs) ? NULL : prt; + return (!prt + ? NULL + : ((invalid_sflgs & erts_atomic32_read_nob(&prt->state)) + ? NULL + : prt)); } @@ -584,14 +602,16 @@ erts_thr_drvport2port_raw(ErlDrvPort drvport) else { Port *prt = (Port *) drvport; #if ERTS_ENABLE_LOCK_CHECK - if (emu_thread) { - ERTS_SMP_LC_ASSERT(erts_lc_is_port_locked(prt)); - ERTS_LC_ASSERT(!prt->port_data_lock - || erts_lc_mtx_is_locked(&prt->port_data_lock->mtx)); - } - else { - ERTS_LC_ASSERT(prt->port_data_lock); - ERTS_LC_ASSERT(erts_lc_mtx_is_locked(&prt->port_data_lock->mtx)); + if (!ERTS_IS_CRASH_DUMPING) { + if (emu_thread) { + ERTS_SMP_LC_ASSERT(erts_lc_is_port_locked(prt)); + ERTS_LC_ASSERT(!prt->port_data_lock + || erts_lc_mtx_is_locked(&prt->port_data_lock->mtx)); + } + else { + ERTS_LC_ASSERT(prt->port_data_lock); + ERTS_LC_ASSERT(erts_lc_mtx_is_locked(&prt->port_data_lock->mtx)); + } } #endif return prt; @@ -606,7 +626,8 @@ erts_drvport2port_raw(ErlDrvPort drvport) return NULL; else { Port *prt = (Port *) drvport; - ERTS_SMP_LC_ASSERT(erts_lc_is_port_locked(prt)); + ERTS_SMP_LC_ASSERT(erts_lc_is_port_locked(prt) + || ERTS_IS_CRASH_DUMPING); return prt; } } @@ -637,7 +658,8 @@ erts_drvportid2port(Eterm id) internal_port_index(id)); if (!prt) return NULL; - ERTS_SMP_LC_ASSERT(erts_lc_is_port_locked(prt)); + ERTS_SMP_LC_ASSERT(erts_lc_is_port_locked(prt) + || ERTS_IS_CRASH_DUMPING); if (prt->common.id != id) return NULL; state = erts_atomic32_read_nob(&prt->state); @@ -680,4 +702,141 @@ erts_is_valid_tracer_port(Eterm id) } #endif /* #if ERTS_GLB_INLINE_INCL_FUNC_DEF */ +struct binary; + +#define ERTS_P2P_SIG_DATA_FLG_BANG_OP (1 << 0) +#define ERTS_P2P_SIG_DATA_FLG_REPLY (1 << 1) +#define ERTS_P2P_SIG_DATA_FLG_NOSUSPEND (1 << 2) +#define ERTS_P2P_SIG_DATA_FLG_FORCE (1 << 3) +#define ERTS_P2P_SIG_DATA_FLG_BAD_OUTPUT (1 << 4) +#define ERTS_P2P_SIG_DATA_FLG_BROKEN_LINK (1 << 5) +#define ERTS_P2P_SIG_DATA_FLG_SCHED (1 << 6) + +struct ErtsProc2PortSigData_ { + int flags; + Eterm caller; + Uint32 ref[ERTS_MAX_REF_NUMBERS]; + union { + struct { + Eterm from; + ErlIOVec *evp; + ErlDrvBinary *cbinp; + } outputv; + struct { + Eterm from; + char *bufp; + ErlDrvSizeT size; + } output; + struct { + Eterm from; + Eterm connected; + } connect; + struct { + Eterm from; + Eterm reason; + ErlHeapFragment *bp; + } exit; + struct { + struct binary *binp; + unsigned int command; + char *bufp; + ErlDrvSizeT size; + } control; + struct { + unsigned int command; + char *bufp; + ErlDrvSizeT size; + } call; + struct { + Eterm item; + } info; + struct { + Eterm port; + Eterm to; + } link; + struct { + Eterm from; + } unlink; + struct { + ErlHeapFragment *bp; + Eterm data; + } set_data; + } u; +} ; + +#define ERTS_PROC2PORT_SIG_EXEC 0 +#define ERTS_PROC2PORT_SIG_ABORT 1 +#define ERTS_PROC2PORT_SIG_ABORT_NOSUSPEND 2 +#define ERTS_PROC2PORT_SIG_ABORT_CLOSED 3 + +typedef int (*ErtsProc2PortSigCallback)(Port *, + erts_aint32_t, + int, + ErtsProc2PortSigData *); + +#define ERTS_PORT_REDS_CMD_OUTPUTV 400 +#define ERTS_PORT_REDS_CMD_OUTPUT 400 +#define ERTS_PORT_REDS_EXIT 300 +#define ERTS_PORT_REDS_CONNECT 40 +#define ERTS_PORT_REDS_UNLINK 40 +#define ERTS_PORT_REDS_LINK 40 +#define ERTS_PORT_REDS_BADSIG 40 +#define ERTS_PORT_REDS_CONTROL 400 +#define ERTS_PORT_REDS_CALL 400 +#define ERTS_PORT_REDS_INFO 100 +#define ERTS_PORT_REDS_SET_DATA 40 +#define ERTS_PORT_REDS_GET_DATA 40 + +typedef enum { + ERTS_PORT_OP_BADARG, + ERTS_PORT_OP_CALLER_EXIT, + ERTS_PORT_OP_BUSY, + ERTS_PORT_OP_BUSY_SCHEDULED, + ERTS_PORT_OP_SCHEDULED, + ERTS_PORT_OP_DROPPED, + ERTS_PORT_OP_DONE +} ErtsPortOpResult; + +ErtsPortOpResult +erts_schedule_proc2port_signal(Process *, + Port *, + Eterm, + Eterm *, + ErtsProc2PortSigData *, + int, + ErtsProc2PortSigCallback); + +int erts_deliver_port_exit(Port *, Eterm, Eterm, int); + +/* + * Port signal flags + */ +#define ERTS_PORT_SIG_FLG_BANG_OP ERTS_P2P_SIG_DATA_FLG_BANG_OP +#define ERTS_PORT_SIG_FLG_NOSUSPEND ERTS_P2P_SIG_DATA_FLG_NOSUSPEND +#define ERTS_PORT_SIG_FLG_FORCE ERTS_P2P_SIG_DATA_FLG_FORCE +#define ERTS_PORT_SIG_FLG_BROKEN_LINK ERTS_P2P_SIG_DATA_FLG_BROKEN_LINK +#define ERTS_PORT_SIG_FLG_BAD_OUTPUT ERTS_P2P_SIG_DATA_FLG_BAD_OUTPUT +#define ERTS_PORT_SIG_FLG_FORCE_SCHED ERTS_P2P_SIG_DATA_FLG_SCHED + +/* + * Port ! {Owner, {command, Data}} + * Port ! {Owner, {connect, NewOwner}} + * Port ! {Owner, close} + */ +ErtsPortOpResult erts_port_command(Process *, int, Port *, Eterm, Eterm *); + +/* + * Signals from processes to ports. + */ +ErtsPortOpResult erts_port_output(Process *, int, Port *, Eterm, Eterm, Eterm *); +ErtsPortOpResult erts_port_exit(Process *, int, Port *, Eterm, Eterm, Eterm *); +ErtsPortOpResult erts_port_connect(Process *, int, Port *, Eterm, Eterm, Eterm *); +ErtsPortOpResult erts_port_link(Process *, Port *, Eterm, Eterm *); +ErtsPortOpResult erts_port_unlink(Process *, Port *, Eterm, Eterm *); +ErtsPortOpResult erts_port_control(Process *, Port *, unsigned int, Eterm, Eterm *); +ErtsPortOpResult erts_port_call(Process *, Port *, unsigned int, Eterm, Eterm *); +ErtsPortOpResult erts_port_info(Process *, Port *, Eterm, Eterm *); +ErtsPortOpResult erts_port_set_data(Process *, Port *, Eterm, Eterm *); +ErtsPortOpResult erts_port_get_data(Process *, Port *, Eterm *); + #endif diff --git a/erts/emulator/beam/erl_port_task.c b/erts/emulator/beam/erl_port_task.c index e613ad0144..e8ed00daee 100644 --- a/erts/emulator/beam/erl_port_task.c +++ b/erts/emulator/beam/erl_port_task.c @@ -36,9 +36,20 @@ #include #if defined(DEBUG) && 0 -#define HARD_DEBUG +#define ERTS_HARD_DEBUG_TASK_QUEUES +#else +#undef ERTS_HARD_DEBUG_TASK_QUEUES +#endif + +#ifdef ERTS_HARD_DEBUG_TASK_QUEUES +static void chk_task_queues(Port *pp, ErtsPortTask *execq, int processing_busy_queue); +#define ERTS_PT_DBG_CHK_TASK_QS(PP, EQ, PBQ) \ + chk_task_queues((PP), (EQ), (PBQ)) +#else +#define ERTS_PT_DBG_CHK_TASK_QS(PP, EQ, PBQ) #endif + /* * Costs in reductions for some port operations. */ @@ -52,7 +63,7 @@ #ifdef USE_VM_PROBES #define DTRACE_DRIVER(PROBE_NAME, PP) \ - if (DTRACE_ENABLED(driver_ready_input)) { \ + if (DTRACE_ENABLED(PROBE_NAME)) { \ DTRACE_CHARBUF(process_str, DTRACE_TERM_BUF_SIZE); \ DTRACE_CHARBUF(port_str, DTRACE_TERM_BUF_SIZE); \ \ @@ -70,6 +81,17 @@ erts_smp_atomic_t erts_port_task_outstanding_io_tasks; #define ERTS_PT_STATE_ABORTED 1 #define ERTS_PT_STATE_EXECUTING 2 +typedef union { + struct { /* I/O tasks */ + ErlDrvEvent event; + ErlDrvEventData event_data; + } io; + struct { + ErtsProc2PortSigCallback callback; + ErtsProc2PortSigData data; + } psig; +} ErtsPortTaskTypeData; + struct ErtsPortTask_ { erts_smp_atomic32_t state; ErtsPortTaskType type; @@ -77,17 +99,39 @@ struct ErtsPortTask_ { struct { ErtsPortTask *next; ErtsPortTaskHandle *handle; - union { - struct { /* I/O tasks */ - ErlDrvEvent event; - ErlDrvEventData event_data; - } io; - } u; + int flags; + Uint32 ref[ERTS_MAX_REF_NUMBERS]; + ErtsPortTaskTypeData td; } alive; ErtsThrPrgrLaterOp release; } u; }; +struct ErtsPortTaskHandleList_ { + ErtsPortTaskHandle handle; + union { + ErtsPortTaskHandleList *next; +#ifdef ERTS_SMP + ErtsThrPrgrLaterOp release; +#endif + } u; +}; + +typedef struct ErtsPortTaskBusyCaller_ ErtsPortTaskBusyCaller; +struct ErtsPortTaskBusyCaller_ { + ErtsPortTaskBusyCaller *next; + Eterm caller; + SWord count; + ErtsPortTask *last; +}; + +#define ERTS_PORT_TASK_BUSY_CALLER_TABLE_BUCKETS 17 +struct ErtsPortTaskBusyCallerTable_ { + ErtsPortTaskBusyCaller *bucket[ERTS_PORT_TASK_BUSY_CALLER_TABLE_BUCKETS]; + ErtsPortTaskBusyCaller pre_alloc_busy_caller; +}; + + static void begin_port_cleanup(Port *pp, ErtsPortTask **execq); ERTS_SCHED_PREF_QUICK_ALLOC_IMPL(port_task, @@ -95,6 +139,11 @@ ERTS_SCHED_PREF_QUICK_ALLOC_IMPL(port_task, 1000, ERTS_ALC_T_PORT_TASK) +ERTS_SCHED_PREF_QUICK_ALLOC_IMPL(busy_caller_table, + ErtsPortTaskBusyCallerTable, + 50, + ERTS_ALC_T_BUSY_CALLER_TAB) + #ifdef ERTS_SMP static void call_port_task_free(void *vptp) @@ -115,6 +164,358 @@ schedule_port_task_free(ErtsPortTask *ptp) #endif } +static ERTS_INLINE ErtsPortTask * +p2p_sig_data_to_task(ErtsProc2PortSigData *sigdp) +{ + ErtsPortTask *ptp; + char *ptr = (char *) sigdp; + ptr -= offsetof(ErtsPortTask, u.alive.td.psig.data); + ptp = (ErtsPortTask *) ptr; + ASSERT(ptp->type == ERTS_PORT_TASK_PROC_SIG); + return ptp; +} + +ErtsProc2PortSigData * +erts_port_task_alloc_p2p_sig_data(void) +{ + ErtsPortTask *ptp = port_task_alloc(); + + ptp->type = ERTS_PORT_TASK_PROC_SIG; + ptp->u.alive.flags = ERTS_PT_FLG_SIG_DEP; + erts_smp_atomic32_init_nob(&ptp->state, ERTS_PT_STATE_SCHEDULED); + + ASSERT(ptp == p2p_sig_data_to_task(&ptp->u.alive.td.psig.data)); + + return &ptp->u.alive.td.psig.data; +} + +static ERTS_INLINE Eterm +task_caller(ErtsPortTask *ptp) +{ + Eterm caller; + + ASSERT(ptp->type == ERTS_PORT_TASK_PROC_SIG); + + caller = ptp->u.alive.td.psig.data.caller; + + ASSERT(is_internal_pid(caller) || is_internal_port(caller)); + + return caller; +} + +/* + * Busy queue management + */ + +static ERTS_INLINE int +caller2bix(Eterm caller) +{ + ASSERT(is_internal_pid(caller) || is_internal_port(caller)); + return (int) (_GET_PID_DATA(caller) % ERTS_PORT_TASK_BUSY_CALLER_TABLE_BUCKETS); +} + + +static void +popped_from_busy_queue(Port *pp, ErtsPortTask *ptp, int last) +{ + ErtsPortTaskBusyCaller **prev_bcpp = NULL, *bcp; + ErtsPortTaskBusyCallerTable *tabp = pp->sched.taskq.local.busy.table; + Eterm caller = task_caller(ptp); + int bix = caller2bix(caller); + + ASSERT(is_internal_pid(caller)); + + ASSERT(tabp); + bcp = tabp->bucket[bix]; + prev_bcpp = &tabp->bucket[bix]; + ASSERT(bcp); + while (bcp->caller != caller) { + prev_bcpp = &bcp->next; + bcp = bcp->next; + ASSERT(bcp); + } + ASSERT(bcp->count > 0); + if (--bcp->count != 0) { + ASSERT(!last); + } + else { + *prev_bcpp = bcp->next; + if (bcp == &tabp->pre_alloc_busy_caller) + bcp->caller = am_undefined; + else + erts_free(ERTS_ALC_T_BUSY_CALLER, bcp); + if (last) { +#ifdef DEBUG + erts_aint32_t flags = +#endif + erts_smp_atomic32_read_band_nob( + &pp->sched.flags, + ~ERTS_PTS_FLG_HAVE_BUSY_TASKS); + ASSERT(flags & ERTS_PTS_FLG_HAVE_BUSY_TASKS); +#ifdef DEBUG + for (bix = 0; bix < ERTS_PORT_TASK_BUSY_CALLER_TABLE_BUCKETS; bix++) { + ASSERT(!tabp->bucket[bix]); + } +#endif + busy_caller_table_free(tabp); + pp->sched.taskq.local.busy.first = NULL; + pp->sched.taskq.local.busy.last = NULL; + pp->sched.taskq.local.busy.table = NULL; + } + } +} + +static void +busy_wait_move_to_busy_queue(Port *pp, ErtsPortTask *ptp) +{ + ErtsPortTaskBusyCallerTable *tabp = pp->sched.taskq.local.busy.table; + Eterm caller = task_caller(ptp); + ErtsPortTaskBusyCaller *bcp; + int bix; + + ASSERT(is_internal_pid(caller)); + /* + * Port is busy and this task type needs to wait until not busy. + */ + + ASSERT(ptp->u.alive.flags & ERTS_PT_FLG_WAIT_BUSY); + + ptp->u.alive.next = NULL; + if (pp->sched.taskq.local.busy.last) { + ASSERT(pp->sched.taskq.local.busy.first); + pp->sched.taskq.local.busy.last->u.alive.next = ptp; + } + else { + int i; + erts_aint32_t flags; + + pp->sched.taskq.local.busy.first = ptp; + flags = erts_smp_atomic32_read_bor_nob(&pp->sched.flags, + ERTS_PTS_FLG_HAVE_BUSY_TASKS); + ASSERT(!(flags & ERTS_PTS_FLG_HAVE_BUSY_TASKS)); + + ASSERT(!tabp); + + tabp = busy_caller_table_alloc(); + pp->sched.taskq.local.busy.table = tabp; + for (i = 0; i < ERTS_PORT_TASK_BUSY_CALLER_TABLE_BUCKETS; i++) + tabp->bucket[i] = NULL; + tabp->pre_alloc_busy_caller.caller = am_undefined; + } + pp->sched.taskq.local.busy.last = ptp; + + bix = caller2bix(caller); + ASSERT(tabp); + bcp = tabp->bucket[bix]; + + while (bcp && bcp->caller != caller) + bcp = bcp->next; + + if (bcp) + bcp->count++; + else { + if (tabp->pre_alloc_busy_caller.caller == am_undefined) + bcp = &tabp->pre_alloc_busy_caller; + else + bcp = erts_alloc(ERTS_ALC_T_BUSY_CALLER, + sizeof(ErtsPortTaskBusyCaller)); + bcp->caller = caller; + bcp->count = 1; + bcp->next = tabp->bucket[bix]; + tabp->bucket[bix] = bcp; + } + + bcp->last = ptp; +} + +static ERTS_INLINE int +check_sig_dep_move_to_busy_queue(Port *pp, ErtsPortTask *ptp) +{ + ErtsPortTaskBusyCallerTable *tabp = pp->sched.taskq.local.busy.table; + ErtsPortTask *last_ptp; + ErtsPortTaskBusyCaller *bcp; + int bix; + Eterm caller; + + ASSERT(ptp->u.alive.flags & ERTS_PT_FLG_SIG_DEP); + ASSERT(pp->sched.taskq.local.busy.last); + ASSERT(tabp); + + + /* + * We are either not busy, or the task does not imply wait on busy port. + * However, due to the signaling order requirements the task might depend + * on other tasks in the busy queue. + */ + + caller = task_caller(ptp); + bix = caller2bix(caller); + bcp = tabp->bucket[bix]; + while (bcp && bcp->caller != caller) + bcp = bcp->next; + + if (!bcp) + return 0; + + /* + * There are other tasks that we depend on in the busy queue; + * move into busy queue. + */ + + bcp->count++; + last_ptp = bcp->last; + ptp->u.alive.next = last_ptp->u.alive.next; + if (!ptp->u.alive.next) { + ASSERT(pp->sched.taskq.local.busy.last == last_ptp); + pp->sched.taskq.local.busy.last = ptp; + } + last_ptp->u.alive.next = ptp; + bcp->last = ptp; + + return 1; +} + +static void +no_sig_dep_move_from_busyq(Port *pp) +{ + ErtsPortTaskBusyCallerTable *tabp = pp->sched.taskq.local.busy.table; + ErtsPortTask *first_ptp, *last_ptp, *ptp; + ErtsPortTaskBusyCaller **prev_bcpp = NULL, *bcp = NULL; + + /* + * Move tasks at the head of the busy queue that no longer + * have any dependencies to busy wait tasks into the ordinary + * queue. + */ + + first_ptp = ptp = pp->sched.taskq.local.busy.first; + + ASSERT(ptp && !(ptp->u.alive.flags & ERTS_PT_FLG_WAIT_BUSY)); + ASSERT(tabp); + + do { + Eterm caller = task_caller(ptp); + + if (!bcp || bcp->caller != caller) { + int bix = caller2bix(caller); + + prev_bcpp = &tabp->bucket[bix]; + bcp = tabp->bucket[bix]; + ASSERT(bcp); + while (bcp->caller != caller) { + ASSERT(bcp); + prev_bcpp = &bcp->next; + bcp = bcp->next; + } + } + + ASSERT(bcp->caller == caller); + ASSERT(bcp->count > 0); + + if (--bcp->count == 0) { + *prev_bcpp = bcp->next; + if (bcp == &tabp->pre_alloc_busy_caller) + bcp->caller = am_undefined; + else + erts_free(ERTS_ALC_T_BUSY_CALLER, bcp); + } + + last_ptp = ptp; + ptp = ptp->u.alive.next; + } while (ptp && !(ptp->u.alive.flags & ERTS_PT_FLG_WAIT_BUSY)); + + pp->sched.taskq.local.busy.first = last_ptp->u.alive.next; + if (!pp->sched.taskq.local.busy.first) { +#ifdef DEBUG + int bix; + erts_aint32_t flags = +#endif + erts_smp_atomic32_read_band_nob( + &pp->sched.flags, + ~ERTS_PTS_FLG_HAVE_BUSY_TASKS); + ASSERT(flags & ERTS_PTS_FLG_HAVE_BUSY_TASKS); +#ifdef DEBUG + for (bix = 0; bix < ERTS_PORT_TASK_BUSY_CALLER_TABLE_BUCKETS; bix++) { + ASSERT(!tabp->bucket[bix]); + } +#endif + busy_caller_table_free(tabp); + pp->sched.taskq.local.busy.last = NULL; + pp->sched.taskq.local.busy.table = NULL; + } + last_ptp->u.alive.next = pp->sched.taskq.local.first; + pp->sched.taskq.local.first = first_ptp; +} + +#ifdef ERTS_HARD_DEBUG_TASK_QUEUES + +static void +chk_task_queues(Port *pp, ErtsPortTask *execq, int processing_busy_queue) +{ + Sint tot_count, tot_table_count; + int bix; + ErtsPortTask *ptp, *last; + ErtsPortTask *first = processing_busy_queue ? execq : pp->sched.taskq.local.busy.first; + ErtsPortTask *nb_task_queue = processing_busy_queue ? pp->sched.taskq.local.first : execq; + ErtsPortTaskBusyCallerTable *tabp = pp->sched.taskq.local.busy.table; + ErtsPortTaskBusyCaller *bcp; + + if (!first) { + ASSERT(!tabp); + ASSERT(!pp->sched.taskq.local.busy.last); + ASSERT(!(erts_smp_atomic32_read_nob(&pp->sched.flags) & ERTS_PTS_FLG_HAVE_BUSY_TASKS)); + return; + } + + ASSERT(erts_smp_atomic32_read_nob(&pp->sched.flags) & ERTS_PTS_FLG_HAVE_BUSY_TASKS); + ASSERT(tabp); + + tot_count = 0; + ptp = first; + while (ptp) { + Sint count = 0; + Eterm caller = task_caller(ptp); + int bix = caller2bix(caller); + for (bcp = tabp->bucket[bix]; bcp; bcp = bcp->next) + if (bcp->caller == caller) + break; + ASSERT(bcp && bcp->caller == caller); + + ASSERT(bcp->last); + while (1) { + ErtsPortTask *ptp2; + + ASSERT(caller == task_caller(ptp)); + count++; + tot_count++; + last = ptp; + + for (ptp2 = nb_task_queue; ptp2; ptp2 = ptp2->u.alive.next) { + ASSERT(ptp != ptp2); + } + + if (ptp == bcp->last) + break; + ptp = ptp->u.alive.next; + } + + ASSERT(count == bcp->count); + ptp = ptp->u.alive.next; + } + + tot_table_count = 0; + for (bix = 0; bix < ERTS_PORT_TASK_BUSY_CALLER_TABLE_BUCKETS; bix++) { + for (bcp = tabp->bucket[bix]; bcp; bcp = bcp->next) + tot_table_count += bcp->count; + } + + ASSERT(tot_count == tot_table_count); + + ASSERT(last == pp->sched.taskq.local.busy.last); +} + +#endif /* ERTS_HARD_DEBUG_TASK_QUEUES */ + /* * Task handle manipulation. */ @@ -150,6 +551,141 @@ set_handle(ErtsPortTask *ptp, ErtsPortTaskHandle *pthp) } } +/* + * No-suspend handles. + */ + +#ifdef ERTS_SMP +static void +free_port_task_handle_list(void *vpthlp) +{ + erts_free(ERTS_ALC_T_PT_HNDL_LIST, vpthlp); +} +#endif + +static void +schedule_port_task_handle_list_free(ErtsPortTaskHandleList *pthlp) +{ +#ifdef ERTS_SMP + erts_schedule_thr_prgr_later_op(free_port_task_handle_list, + (void *) pthlp, + &pthlp->u.release); +#else + erts_free(ERTS_ALC_T_PT_HNDL_LIST, pthlp); +#endif +} + +static ERTS_INLINE void +abort_nosuspend_task(ErtsPortTaskType type, + ErtsPortTaskTypeData *tdp) +{ + + if (type != ERTS_PORT_TASK_PROC_SIG) + ERTS_INTERNAL_ERROR("Invalid no-suspend port task type"); + + tdp->psig.callback(NULL, + ERTS_PORT_SFLG_INVALID, + ERTS_PROC2PORT_SIG_ABORT_NOSUSPEND, + &tdp->psig.data); +} + + +static void +save_nosuspend_handle(Port *pp, ErtsPortTask *ptp) +{ + erts_aint32_t act; + ErtsPortTaskHandleList *pthlp = erts_alloc(ERTS_ALC_T_PT_HNDL_LIST, + sizeof(ErtsPortTaskHandleList)); + + set_handle(ptp, &pthlp->handle); + + ASSERT(ptp == handle2task(&pthlp->handle)); + ASSERT(ptp->u.alive.handle == &pthlp->handle); + + act = erts_smp_atomic32_read_nob(&pp->sched.flags); + + if (!(act & ERTS_PTS_FLG_BUSY)) { + + erts_port_task_sched_lock(&pp->sched); + pthlp->u.next = pp->sched.taskq.local.busy.nosuspend; + pp->sched.taskq.local.busy.nosuspend = pthlp; + erts_port_task_sched_unlock(&pp->sched); + + act = erts_smp_atomic32_read_nob(&pp->sched.flags); + + while (1) { + erts_aint32_t exp, new; + + if ((act & (ERTS_PTS_FLG_BUSY|ERTS_PTS_FLG_HAVE_NS_TASKS)) + == ERTS_PTS_FLG_HAVE_NS_TASKS) + return; + + if (act & ERTS_PTS_FLG_BUSY) { + erts_aint32_t s; + s = erts_smp_atomic32_cmpxchg_nob(&ptp->state, + ERTS_PT_STATE_ABORTED, + ERTS_PT_STATE_SCHEDULED); + if (s == ERTS_PT_STATE_SCHEDULED) { + reset_port_task_handle(&pthlp->handle); + break; /* Abort task */ + } + /* Else: someone else handled it */ + return; + } + + new = exp = act; + + new |= ERTS_PTS_FLG_HAVE_NS_TASKS; + + act = erts_smp_atomic32_cmpxchg_relb(&pp->sched.flags, new, exp); + if (act == exp) + return; + + } + } + + + abort_nosuspend_task(ptp->type, &ptp->u.alive.td); +} + + +static ErtsPortTaskHandleList * +get_free_nosuspend_handles(Port *pp) +{ + ErtsPortTaskHandleList *nshp, *last_nshp = NULL; + + ERTS_SMP_LC_ASSERT(erts_port_task_sched_lock_is_locked(&pp->sched)); + + nshp = pp->sched.taskq.local.busy.nosuspend; + + while (nshp && !erts_port_task_is_scheduled(&nshp->handle)) { + last_nshp = nshp; + nshp = nshp->u.next; + } + + if (!last_nshp) + nshp = NULL; + else { + nshp = pp->sched.taskq.local.busy.nosuspend; + pp->sched.taskq.local.busy.nosuspend = last_nshp->u.next; + last_nshp->u.next = NULL; + if (!pp->sched.taskq.local.busy.nosuspend) + erts_smp_atomic32_read_band_nob(&pp->sched.flags, + ~ERTS_PTS_FLG_HAVE_NS_TASKS); + } + return nshp; +} + +static void +free_nosuspend_handles(ErtsPortTaskHandleList *free_nshp) +{ + while (free_nshp) { + ErtsPortTaskHandleList *nshp = free_nshp; + free_nshp = free_nshp->u.next; + schedule_port_task_handle_list_free(nshp); + } +} + /* * Port queue operations */ @@ -225,42 +761,21 @@ enqueue_task(Port *pp, ErtsPortTask *ptp) return flags; } -static ERTS_INLINE ErtsPortTask * -pop_task(Port *pp, ErtsPortTask **execqp) +static ERTS_INLINE void +prepare_exec(Port *pp, ErtsPortTask **execqp, int *processing_busy_q_p) { - ErtsPortTask *ptp; + erts_aint32_t act = erts_smp_atomic32_read_nob(&pp->sched.flags); - ptp = *execqp; - if (ptp) { - *execqp = ptp->u.alive.next; - return ptp; + if (!pp->sched.taskq.local.busy.first || (act & ERTS_PTS_FLG_BUSY)) { + *execqp = pp->sched.taskq.local.first; + *processing_busy_q_p = 0; + } + else { + *execqp = pp->sched.taskq.local.busy.first; + *processing_busy_q_p = 1; } - ASSERT(!pp->sched.taskq.local); - - erts_port_task_sched_lock(&pp->sched); - ptp = pp->sched.taskq.in.first; - pp->sched.taskq.in.first = NULL; - pp->sched.taskq.in.last = NULL; - if (ptp) - *execqp = ptp->u.alive.next; - else - erts_smp_atomic32_read_band_nob(&pp->sched.flags, - ~ERTS_PTS_FLG_HAVE_TASKS); - erts_port_task_sched_unlock(&pp->sched); - - - return ptp; -} - -static ERTS_INLINE void -prepare_exec(Port *pp, ErtsPortTask **execqp) -{ - erts_aint32_t act; - *execqp = pp->sched.taskq.local; - - /* guess a likely value */ - act = ERTS_PTS_FLG_HAVE_TASKS|ERTS_PTS_FLG_IN_RUNQ; + ERTS_PT_DBG_CHK_TASK_QS(pp, *execqp, *processing_busy_q_p); while (1) { erts_aint32_t new, exp; @@ -281,11 +796,19 @@ prepare_exec(Port *pp, ErtsPortTask **execqp) /* finalize_exec() return value != 0 if port should remain active */ static ERTS_INLINE int -finalize_exec(Port *pp, ErtsPortTask **execq) +finalize_exec(Port *pp, ErtsPortTask **execq, int processing_busy_q) { erts_aint32_t act; - pp->sched.taskq.local = *execq; + if (!processing_busy_q) + pp->sched.taskq.local.first = *execq; + else { + pp->sched.taskq.local.busy.first = *execq; + ASSERT(*execq); + } + + ERTS_PT_DBG_CHK_TASK_QS(pp, *execq, processing_busy_q); + *execq = NULL; /* guess a likely value */ @@ -313,6 +836,155 @@ finalize_exec(Port *pp, ErtsPortTask **execq) return (act & ERTS_PTS_FLG_HAVE_TASKS) != 0; } +static ERTS_INLINE erts_aint32_t +select_queue_for_exec(Port *pp, ErtsPortTask **execqp, int *processing_busy_q_p) +{ + erts_aint32_t flags = erts_smp_atomic32_read_nob(&pp->sched.flags); + + ERTS_PT_DBG_CHK_TASK_QS(pp, *execqp, *processing_busy_q_p); + + if (flags & ERTS_PTS_FLG_BUSY) { + if (*processing_busy_q_p) { + ErtsPortTask *ptp; + + ptp = pp->sched.taskq.local.busy.first = *execqp; + if (!ptp) + pp->sched.taskq.local.busy.last = NULL; + else if (!(ptp->u.alive.flags & ERTS_PT_FLG_WAIT_BUSY)) + no_sig_dep_move_from_busyq(pp); + + *execqp = pp->sched.taskq.local.first; + *processing_busy_q_p = 0; + + ERTS_PT_DBG_CHK_TASK_QS(pp, *execqp, *processing_busy_q_p); + } + + return flags; + } + + /* Not busy */ + + if (!*processing_busy_q_p && pp->sched.taskq.local.busy.first) { + pp->sched.taskq.local.first = *execqp; + *execqp = pp->sched.taskq.local.busy.first; + *processing_busy_q_p = 1; + + ERTS_PT_DBG_CHK_TASK_QS(pp, *execqp, *processing_busy_q_p); + } + + return flags; +} + +/* + * check_task_for_exec() returns a value !0 if the task + * is ok to execute; otherwise 0. + */ +static ERTS_INLINE int +check_task_for_exec(Port *pp, + erts_aint32_t flags, + ErtsPortTask **execqp, + int *processing_busy_q_p, + ErtsPortTask *ptp) +{ + + if (!*processing_busy_q_p) { + /* Processing normal queue */ + + ERTS_PT_DBG_CHK_TASK_QS(pp, ptp, *processing_busy_q_p); + + if ((flags & ERTS_PTS_FLG_BUSY) + && (ptp->u.alive.flags & ERTS_PT_FLG_WAIT_BUSY)) { + + busy_wait_move_to_busy_queue(pp, ptp); + ERTS_PT_DBG_CHK_TASK_QS(pp, *execqp, *processing_busy_q_p); + + return 0; + } + + if (pp->sched.taskq.local.busy.last + && (ptp->u.alive.flags & ERTS_PT_FLG_SIG_DEP)) { + + int res = !check_sig_dep_move_to_busy_queue(pp, ptp); + ERTS_PT_DBG_CHK_TASK_QS(pp, *execqp, *processing_busy_q_p); + + return res; + } + + } + else { + /* Processing busy queue */ + + ASSERT(!(flags & ERTS_PTS_FLG_BUSY)); + + ERTS_PT_DBG_CHK_TASK_QS(pp, ptp, *processing_busy_q_p); + + popped_from_busy_queue(pp, ptp, !*execqp); + + if (!*execqp) { + *execqp = pp->sched.taskq.local.first; + *processing_busy_q_p = 0; + } + + ERTS_PT_DBG_CHK_TASK_QS(pp, *execqp, *processing_busy_q_p); + + } + + return 1; +} + +static ErtsPortTask * +fetch_in_queue(Port *pp, ErtsPortTask **execqp) +{ + ErtsPortTask *ptp; + ErtsPortTaskHandleList *free_nshp = NULL; + + erts_port_task_sched_lock(&pp->sched); + + ptp = pp->sched.taskq.in.first; + pp->sched.taskq.in.first = NULL; + pp->sched.taskq.in.last = NULL; + if (ptp) + *execqp = ptp->u.alive.next; + else + erts_smp_atomic32_read_band_nob(&pp->sched.flags, + ~ERTS_PTS_FLG_HAVE_TASKS); + + + if (pp->sched.taskq.local.busy.nosuspend) + free_nshp = get_free_nosuspend_handles(pp); + + erts_port_task_sched_unlock(&pp->sched); + + if (free_nshp) + free_nosuspend_handles(free_nshp); + + return ptp; +} + +static ERTS_INLINE ErtsPortTask * +select_task_for_exec(Port *pp, + ErtsPortTask **execqp, + int *processing_busy_q_p) +{ + ErtsPortTask *ptp; + erts_aint32_t flags; + + flags = select_queue_for_exec(pp, execqp, processing_busy_q_p); + + while (1) { + ptp = *execqp; + if (ptp) + *execqp = ptp->u.alive.next; + else { + ptp = fetch_in_queue(pp, execqp); + if (!ptp) + return NULL; + } + if (check_task_for_exec(pp, flags, execqp, processing_busy_q_p, ptp)) + return ptp; + } +} + /* * Abort a scheduled task. */ @@ -358,6 +1030,12 @@ erts_port_task_abort(ErtsPortTaskHandle *pthp) &erts_port_task_outstanding_io_tasks) > 0); erts_smp_atomic_dec_relb(&erts_port_task_outstanding_io_tasks); break; + case ERTS_PORT_TASK_PROC_SIG: + ptp->u.alive.td.psig.callback(NULL, + ERTS_PORT_SFLG_INVALID, + ERTS_PROC2PORT_SIG_ABORT, + &ptp->u.alive.td.psig.data); + break; default: break; } @@ -373,6 +1051,88 @@ erts_port_task_abort(ErtsPortTaskHandle *pthp) return res; } +void +erts_port_task_abort_nosuspend_tasks(Port *pp) +{ + ErtsPortTaskHandleList *abort_list; +#ifdef ERTS_SMP + ErtsThrPrgrDelayHandle dhndl = ERTS_THR_PRGR_DHANDLE_INVALID; +#endif + + erts_port_task_sched_lock(&pp->sched); + erts_smp_atomic32_read_band_nob(&pp->sched.flags, + ~ERTS_PTS_FLG_HAVE_NS_TASKS); + abort_list = pp->sched.taskq.local.busy.nosuspend; + pp->sched.taskq.local.busy.nosuspend = NULL; + erts_port_task_sched_unlock(&pp->sched); + + while (abort_list) { +#ifdef DEBUG + ErtsPortTaskHandle *saved_pthp; +#endif + ErtsPortTaskType type; + ErtsPortTaskTypeData td; + ErtsPortTaskHandle *pthp; + ErtsPortTask *ptp; + ErtsPortTaskHandleList *pthlp; + erts_aint32_t old_state; + + pthlp = abort_list; + abort_list = pthlp->u.next; + +#ifdef ERTS_SMP + if (dhndl != ERTS_THR_PRGR_DHANDLE_MANAGED) + dhndl = erts_thr_progress_unmanaged_delay(); +#endif + + pthp = &pthlp->handle; + ptp = handle2task(pthp); + if (!ptp) { +#ifdef ERTS_SMP + if (dhndl != ERTS_THR_PRGR_DHANDLE_MANAGED) + erts_thr_progress_unmanaged_continue(dhndl); +#endif + schedule_port_task_handle_list_free(pthlp); + continue; + } + +#ifdef DEBUG + saved_pthp = ptp->u.alive.handle; + ERTS_SMP_READ_MEMORY_BARRIER; + old_state = erts_smp_atomic32_read_nob(&ptp->state); + if (old_state == ERTS_PT_STATE_SCHEDULED) { + ASSERT(saved_pthp == pthp); + } +#endif + + old_state = erts_smp_atomic32_cmpxchg_nob(&ptp->state, + ERTS_PT_STATE_ABORTED, + ERTS_PT_STATE_SCHEDULED); + if (old_state != ERTS_PT_STATE_SCHEDULED) { + /* Task already aborted, executing, or executed */ +#ifdef ERTS_SMP + if (dhndl != ERTS_THR_PRGR_DHANDLE_MANAGED) + erts_thr_progress_unmanaged_continue(dhndl); +#endif + schedule_port_task_handle_list_free(pthlp); + continue; + } + + reset_port_task_handle(pthp); + + type = ptp->type; + td = ptp->u.alive.td; + +#ifdef ERTS_SMP + if (dhndl != ERTS_THR_PRGR_DHANDLE_MANAGED) + erts_thr_progress_unmanaged_continue(dhndl); +#endif + schedule_port_task_handle_list_free(pthlp); + + abort_nosuspend_task(type, &td); + } +} + /* * Schedule a task. */ @@ -416,18 +1176,23 @@ erts_port_task_schedule(Eterm id, if (!pp) goto fail; - ptp = port_task_alloc(); + if (type != ERTS_PORT_TASK_PROC_SIG) { + ptp = port_task_alloc(); - ptp->type = type; + ptp->type = type; + ptp->u.alive.flags = 0; - erts_smp_atomic32_init_nob(&ptp->state, ERTS_PT_STATE_SCHEDULED); + erts_smp_atomic32_init_nob(&ptp->state, ERTS_PT_STATE_SCHEDULED); + + set_handle(ptp, pthp); + } switch (type) { case ERTS_PORT_TASK_INPUT: case ERTS_PORT_TASK_OUTPUT: { va_list argp; va_start(argp, type); - ptp->u.alive.u.io.event = va_arg(argp, ErlDrvEvent); + ptp->u.alive.td.io.event = va_arg(argp, ErlDrvEvent); va_end(argp); erts_smp_atomic_inc_relb(&erts_port_task_outstanding_io_tasks); break; @@ -435,18 +1200,32 @@ erts_port_task_schedule(Eterm id, case ERTS_PORT_TASK_EVENT: { va_list argp; va_start(argp, type); - ptp->u.alive.u.io.event = va_arg(argp, ErlDrvEvent); - ptp->u.alive.u.io.event_data = va_arg(argp, ErlDrvEventData); + ptp->u.alive.td.io.event = va_arg(argp, ErlDrvEvent); + ptp->u.alive.td.io.event_data = va_arg(argp, ErlDrvEventData); va_end(argp); erts_smp_atomic_inc_relb(&erts_port_task_outstanding_io_tasks); break; } + case ERTS_PORT_TASK_PROC_SIG: { + ErtsProc2PortSigData *sigdp; + va_list argp; + ASSERT(!pthp); + va_start(argp, type); + sigdp = va_arg(argp, ErtsProc2PortSigData *); + ptp = p2p_sig_data_to_task(sigdp); + ptp->u.alive.td.psig.callback = va_arg(argp, ErtsProc2PortSigCallback); + ptp->u.alive.flags |= va_arg(argp, int); + va_end(argp); + if (ptp->u.alive.flags & ERTS_PT_FLG_NOSUSPEND) + save_nosuspend_handle(pp, ptp); + else + set_handle(ptp, pthp); + break; + } default: break; } - set_handle(ptp, pthp); - act = enqueue_task(pp, ptp); if (act & ERTS_PTS_FLG_EXIT) { reset_handle(ptp); @@ -572,6 +1351,7 @@ erts_port_task_execute(ErtsRunQueue *runq, Port **curr_port_pp) { Port *pp; ErtsPortTask *execq; + int processing_busy_q; int res = 0; int reds = ERTS_PORT_REDS_EXECUTE; erts_aint_t io_tasks_executed = 0; @@ -606,7 +1386,7 @@ erts_port_task_execute(ErtsRunQueue *runq, Port **curr_port_pp) erts_smp_spin_unlock(&erts_sched_stat.lock); } - prepare_exec(pp, &execq); + prepare_exec(pp, &execq, &processing_busy_q); erts_smp_port_lock(pp); @@ -617,14 +1397,14 @@ erts_port_task_execute(ErtsRunQueue *runq, Port **curr_port_pp) fpe_was_unmasked = erts_block_fpe(); - state = erts_atomic_read_nob(&pp->state); + state = erts_atomic32_read_nob(&pp->state); goto begin_handle_tasks; while (1) { erts_aint32_t task_state; ErtsPortTask *ptp; - ptp = pop_task(pp, &execq); + ptp = select_task_for_exec(pp, &execq, &processing_busy_q); if (!ptp) break; @@ -645,40 +1425,44 @@ erts_port_task_execute(ErtsRunQueue *runq, Port **curr_port_pp) switch (ptp->type) { case ERTS_PORT_TASK_TIMEOUT: reds += ERTS_PORT_REDS_TIMEOUT; - if (!(erts_atomic32_read_nob(&pp->state) & ERTS_PORT_SFLGS_DEAD)) { + if (!(state & ERTS_PORT_SFLGS_DEAD)) { DTRACE_DRIVER(driver_timeout, pp); (*pp->drv_ptr->timeout)((ErlDrvData) pp->drv_data); } break; case ERTS_PORT_TASK_INPUT: reds += ERTS_PORT_REDS_INPUT; - ASSERT((erts_atomic32_read_nob(&pp->state) - & ERTS_PORT_SFLGS_DEAD) == 0); + ASSERT((state & ERTS_PORT_SFLGS_DEAD) == 0); DTRACE_DRIVER(driver_ready_input, pp); /* NOTE some windows drivers use ->ready_input for input and output */ (*pp->drv_ptr->ready_input)((ErlDrvData) pp->drv_data, - ptp->u.alive.u.io.event); + ptp->u.alive.td.io.event); io_tasks_executed++; break; case ERTS_PORT_TASK_OUTPUT: reds += ERTS_PORT_REDS_OUTPUT; - ASSERT((erts_atomic32_read_nob(&pp->state) - & ERTS_PORT_SFLGS_DEAD) == 0); + ASSERT((state & ERTS_PORT_SFLGS_DEAD) == 0); DTRACE_DRIVER(driver_ready_output, pp); (*pp->drv_ptr->ready_output)((ErlDrvData) pp->drv_data, - ptp->u.alive.u.io.event); + ptp->u.alive.td.io.event); io_tasks_executed++; break; case ERTS_PORT_TASK_EVENT: reds += ERTS_PORT_REDS_EVENT; - ASSERT((erts_atomic32_read_nob(&pp->state) - & ERTS_PORT_SFLGS_DEAD) == 0); + ASSERT((state & ERTS_PORT_SFLGS_DEAD) == 0); DTRACE_DRIVER(driver_event, pp); (*pp->drv_ptr->event)((ErlDrvData) pp->drv_data, - ptp->u.alive.u.io.event, - ptp->u.alive.u.io.event_data); + ptp->u.alive.td.io.event, + ptp->u.alive.td.io.event_data); io_tasks_executed++; break; + case ERTS_PORT_TASK_PROC_SIG: + ASSERT((state & ERTS_PORT_SFLGS_DEAD) == 0); + reds += ptp->u.alive.td.psig.callback(pp, + state, + ERTS_PROC2PORT_SIG_EXEC, + &ptp->u.alive.td.psig.data); + break; case ERTS_PORT_TASK_DIST_CMD: reds += erts_dist_command(pp, CONTEXT_REDS-reds); break; @@ -740,7 +1524,7 @@ erts_port_task_execute(ErtsRunQueue *runq, Port **curr_port_pp) ASSERT(runq == (ErtsRunQueue *) erts_smp_atomic_read_nob(&pp->run_queue)); #endif - active = finalize_exec(pp, &execq); + active = finalize_exec(pp, &execq, processing_busy_q); erts_port_release(pp); @@ -858,24 +1642,30 @@ begin_port_cleanup(Port *pp, ErtsPortTask **execqp) break; case ERTS_PORT_TASK_INPUT: erts_stale_drv_select(pp->common.id, - ptp->u.alive.u.io.event, + ptp->u.alive.td.io.event, DO_READ, 1); break; case ERTS_PORT_TASK_OUTPUT: erts_stale_drv_select(pp->common.id, - ptp->u.alive.u.io.event, + ptp->u.alive.td.io.event, DO_WRITE, 1); break; case ERTS_PORT_TASK_EVENT: erts_stale_drv_select(pp->common.id, - ptp->u.alive.u.io.event, + ptp->u.alive.td.io.event, 0, 1); break; case ERTS_PORT_TASK_DIST_CMD: break; + case ERTS_PORT_TASK_PROC_SIG: + ptp->u.alive.td.psig.callback(NULL, + ERTS_PORT_SFLG_INVALID, + ERTS_PROC2PORT_SIG_ABORT_CLOSED, + &ptp->u.alive.td.psig.data); + break; default: erl_exit(ERTS_ABORT_EXIT, "Invalid port task type: %d\n", @@ -944,4 +1734,5 @@ erts_port_task_init(void) erts_smp_atomic_init_nob(&erts_port_task_outstanding_io_tasks, (erts_aint_t) 0); init_port_task_alloc(); + init_busy_caller_table_alloc(); } diff --git a/erts/emulator/beam/erl_port_task.h b/erts/emulator/beam/erl_port_task.h index 71b1cc6e25..c41f8104c7 100644 --- a/erts/emulator/beam/erl_port_task.h +++ b/erts/emulator/beam/erl_port_task.h @@ -27,6 +27,9 @@ #define ERTS_PORT_TASK_H_BASIC_TYPES__ #include "erl_sys_driver.h" #include "erl_smp.h" +#define ERL_PORT_GET_PORT_TYPE_ONLY__ +#include "erl_port.h" +#undef ERL_PORT_GET_PORT_TYPE_ONLY__ typedef erts_smp_atomic_t ErtsPortTaskHandle; #endif @@ -43,12 +46,19 @@ typedef erts_smp_atomic_t ErtsPortTaskHandle; #define ERTS_INCLUDE_SCHEDULER_INTERNALS #endif +#define ERTS_PT_FLG_WAIT_BUSY (1 << 0) +#define ERTS_PT_FLG_SIG_DEP (1 << 1) +#define ERTS_PT_FLG_NOSUSPEND (1 << 2) +#define ERTS_PT_FLG_REF (1 << 3) +#define ERTS_PT_FLG_BAD_OUTPUT (1 << 4) + typedef enum { ERTS_PORT_TASK_INPUT, ERTS_PORT_TASK_OUTPUT, ERTS_PORT_TASK_EVENT, ERTS_PORT_TASK_TIMEOUT, - ERTS_PORT_TASK_DIST_CMD + ERTS_PORT_TASK_DIST_CMD, + ERTS_PORT_TASK_PROC_SIG } ErtsPortTaskType; #ifdef ERTS_INCLUDE_SCHEDULER_INTERNALS @@ -61,14 +71,35 @@ extern erts_smp_atomic_t erts_port_task_outstanding_io_tasks; #define ERTS_PTS_FLG_HAVE_TASKS (((erts_aint32_t) 1) << 2) #define ERTS_PTS_FLG_EXIT (((erts_aint32_t) 1) << 3) #define ERTS_PTS_FLG_BUSY (((erts_aint32_t) 1) << 4) +#define ERTS_PTS_FLG_HAVE_BUSY_TASKS (((erts_aint32_t) 1) << 5) +#define ERTS_PTS_FLG_HAVE_NS_TASKS (((erts_aint32_t) 1) << 6) +#define ERTS_PTS_FLG_PARALLELISM (((erts_aint32_t) 1) << 7) +#define ERTS_PTS_FLG_FORCE_SCHED (((erts_aint32_t) 1) << 8) + +#define ERTS_PTS_FLGS_FORCE_SCHEDULE_OP \ + (ERTS_PTS_FLG_EXIT \ + | ERTS_PTS_FLG_HAVE_BUSY_TASKS \ + | ERTS_PTS_FLG_HAVE_TASKS \ + | ERTS_PTS_FLG_EXEC \ + | ERTS_PTS_FLG_FORCE_SCHED) typedef struct ErtsPortTask_ ErtsPortTask; +typedef struct ErtsPortTaskBusyCallerTable_ ErtsPortTaskBusyCallerTable; +typedef struct ErtsPortTaskHandleList_ ErtsPortTaskHandleList; typedef struct { Port *next; struct { - ErtsPortTask *local; + struct { + struct { + ErtsPortTask *first; + ErtsPortTask *last; + ErtsPortTaskBusyCallerTable *table; + ErtsPortTaskHandleList *nosuspend; + } busy; + ErtsPortTask *first; + } local; struct { ErtsPortTask *first; ErtsPortTask *last; @@ -87,6 +118,7 @@ ERTS_GLB_INLINE void erts_port_task_init_sched(ErtsPortTaskSched *ptsp, ERTS_GLB_INLINE void erts_port_task_fini_sched(ErtsPortTaskSched *ptsp); ERTS_GLB_INLINE void erts_port_task_sched_lock(ErtsPortTaskSched *ptsp); ERTS_GLB_INLINE void erts_port_task_sched_unlock(ErtsPortTaskSched *ptsp); +ERTS_GLB_INLINE int erts_port_task_sched_lock_is_locked(ErtsPortTaskSched *ptsp); #ifdef ERTS_INCLUDE_SCHEDULER_INTERNALS ERTS_GLB_INLINE int erts_port_task_have_outstanding_io_tasks(void); @@ -110,7 +142,11 @@ ERTS_GLB_INLINE void erts_port_task_init_sched(ErtsPortTaskSched *ptsp, Eterm instr_id) { ptsp->next = NULL; - ptsp->taskq.local = NULL; + ptsp->taskq.local.busy.first = NULL; + ptsp->taskq.local.busy.last = NULL; + ptsp->taskq.local.busy.table = NULL; + ptsp->taskq.local.busy.nosuspend = NULL; + ptsp->taskq.local.first = NULL; ptsp->taskq.in.first = NULL; ptsp->taskq.in.last = NULL; erts_smp_atomic32_init_nob(&ptsp->flags, 0); @@ -135,6 +171,17 @@ erts_port_task_sched_unlock(ErtsPortTaskSched *ptsp) #endif } +ERTS_GLB_INLINE int +erts_port_task_sched_lock_is_locked(ErtsPortTaskSched *ptsp) +{ +#if defined(ERTS_SMP) && defined(ERTS_ENABLE_LOCK_CHECK) + return erts_lc_mtx_is_locked(&ptsp->mtx); +#else + return 0; +#endif +} + + ERTS_GLB_INLINE void erts_port_task_fini_sched(ErtsPortTaskSched *ptsp) { @@ -162,12 +209,15 @@ void erts_port_task_init(void); #endif int erts_port_task_abort(ErtsPortTaskHandle *); +void erts_port_task_abort_nosuspend_tasks(Port *); + int erts_port_task_schedule(Eterm, ErtsPortTaskHandle *, ErtsPortTaskType, ...); void erts_port_task_free_port(Port *); int erts_port_is_scheduled(Port *); +ErtsProc2PortSigData *erts_port_task_alloc_p2p_sig_data(void); #ifdef ERTS_SMP void erts_enqueue_port(ErtsRunQueue *rq, Port *pp); diff --git a/erts/emulator/beam/erl_process.c b/erts/emulator/beam/erl_process.c index 6cf267b01e..332cc81d48 100644 --- a/erts/emulator/beam/erl_process.c +++ b/erts/emulator/beam/erl_process.c @@ -1490,7 +1490,7 @@ handle_reap_ports(ErtsAuxWorkData *awdp, erts_aint32_t aux_work) ERTS_PORT_SFLG_HALT); erts_smp_atomic32_inc_nob(&erts_halt_progress); if (!(state & (ERTS_PORT_SFLG_EXITING|ERTS_PORT_SFLG_CLOSING))) - erts_do_exit_port(prt, prt->common.id, am_killed); + erts_deliver_port_exit(prt, prt->common.id, am_killed, 0); } erts_port_release(prt); @@ -6086,6 +6086,8 @@ erts_suspend(Process* c_p, ErtsProcLocks c_p_locks, Port *busy_port) if (!(c_p_locks & ERTS_PROC_LOCK_STATUS)) erts_smp_proc_unlock(c_p, ERTS_PROC_LOCK_STATUS); + if (suspend && busy_port && erts_system_monitor_flags.busy_port) + monitor_generic(c_p, am_busy_port, busy_port->common.id); } void @@ -8183,14 +8185,15 @@ static void doit_exit_link(ErtsLink *lnk, void *vpcontext) switch(lnk->type) { case LINK_PID: if(is_internal_port(item)) { - Port *prt = erts_id2port(item); - if (prt) { - rlnk = erts_remove_link(&ERTS_P_LINKS(prt), p->common.id); - if (rlnk) - erts_destroy_link(rlnk); - erts_do_exit_port(prt, p->common.id, reason); - erts_port_release(prt); - } + Port *prt = erts_port_lookup(item, ERTS_PORT_SFLGS_INVALID_LOOKUP); + if (prt) + erts_port_exit(NULL, + (ERTS_PORT_SIG_FLG_FORCE_SCHED + | ERTS_PORT_SIG_FLG_BROKEN_LINK), + prt, + p->common.id, + reason, + NULL); } else if(is_external_port(item)) { erts_dsprintf_buf_t *dsbufp = erts_create_logger_dsbuf(); diff --git a/erts/emulator/beam/erl_thr_progress.h b/erts/emulator/beam/erl_thr_progress.h index 0e63d41fda..1416aa6166 100644 --- a/erts/emulator/beam/erl_thr_progress.h +++ b/erts/emulator/beam/erl_thr_progress.h @@ -134,6 +134,7 @@ typedef struct { typedef int ErtsThrPrgrDelayHandle; #define ERTS_THR_PRGR_DHANDLE_MANAGED ((ErtsThrPrgrDelayHandle) -1) /* ERTS_THR_PRGR_DHANDLE_MANAGED implies managed thread */ +#define ERTS_THR_PRGR_DHANDLE_INVALID ((ErtsThrPrgrDelayHandle) -2) extern ErtsThrPrgr erts_thr_prgr__; diff --git a/erts/emulator/beam/erl_trace.h b/erts/emulator/beam/erl_trace.h new file mode 100644 index 0000000000..0d6df699ff --- /dev/null +++ b/erts/emulator/beam/erl_trace.h @@ -0,0 +1,138 @@ +/* + * %CopyrightBegin% + * + * Copyright Ericsson AB 2012. All Rights Reserved. + * + * The contents of this file are subject to the Erlang Public License, + * Version 1.1, (the "License"); you may not use this file except in + * compliance with the License. You should have received a copy of the + * Erlang Public License along with this software. If not, it can be + * retrieved online at http://www.erlang.org/. + * + * Software distributed under the License is distributed on an "AS IS" + * basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See + * the License for the specific language governing rights and limitations + * under the License. + * + * %CopyrightEnd% + */ + + +#ifndef ERL_TRACE_H__ +#define ERL_TRACE_H__ + +struct binary; + +/* erl_bif_trace.c */ +Eterm erl_seq_trace_info(Process *p, Eterm arg1); +void erts_system_monitor_clear(Process *c_p); +void erts_system_profile_clear(Process *c_p); + +/* erl_trace.c */ +void erts_init_trace(void); +void erts_trace_check_exiting(Eterm exiting); +Eterm erts_set_system_seq_tracer(Process *c_p, + ErtsProcLocks c_p_locks, + Eterm new); +Eterm erts_get_system_seq_tracer(void); +void erts_change_default_tracing(int setflags, Uint *flagsp, Eterm *tracerp); +void erts_get_default_tracing(Uint *flagsp, Eterm *tracerp); +void erts_set_system_monitor(Eterm monitor); +Eterm erts_get_system_monitor(void); + +#ifdef ERTS_SMP +void erts_check_my_tracer_proc(Process *); +void erts_block_sys_msg_dispatcher(void); +void erts_release_sys_msg_dispatcher(void); +void erts_foreach_sys_msg_in_q(void (*func)(Eterm, + Eterm, + Eterm, + ErlHeapFragment *)); +void erts_queue_error_logger_message(Eterm, Eterm, ErlHeapFragment *); +#endif + +void erts_send_sys_msg_proc(Eterm, Eterm, Eterm, ErlHeapFragment *); +void trace_send(Process*, Eterm, Eterm); +void trace_receive(Process*, Eterm); +Uint32 erts_call_trace(Process *p, BeamInstr mfa[], struct binary *match_spec, Eterm* args, + int local, Eterm *tracer_pid); +void erts_trace_return(Process* p, BeamInstr* fi, Eterm retval, Eterm *tracer_pid); +void erts_trace_exception(Process* p, BeamInstr mfa[], Eterm class, Eterm value, + Eterm *tracer); +void erts_trace_return_to(Process *p, BeamInstr *pc); +void trace_sched(Process*, Eterm); +void trace_proc(Process*, Process*, Eterm, Eterm); +void trace_proc_spawn(Process*, Eterm pid, Eterm mod, Eterm func, Eterm args); +void save_calls(Process *p, Export *); +void trace_gc(Process *p, Eterm what); +/* port tracing */ +void trace_virtual_sched(Process*, Eterm); +void trace_sched_ports(Port *pp, Eterm); +void trace_sched_ports_where(Port *pp, Eterm, Eterm); +void trace_port(Port *, Eterm what, Eterm data); +void trace_port_open(Port *, Eterm calling_pid, Eterm drv_name); + +/* system_profile */ +void erts_set_system_profile(Eterm profile); +Eterm erts_get_system_profile(void); +void profile_scheduler(Eterm scheduler_id, Eterm); +void profile_scheduler_q(Eterm scheduler_id, Eterm state, Eterm no_schedulers, Uint Ms, Uint s, Uint us); +void profile_runnable_proc(Process* p, Eterm status); +void profile_runnable_port(Port* p, Eterm status); +void erts_system_profile_setup_active_schedulers(void); + +/* system_monitor */ +void monitor_long_gc(Process *p, Uint time); +void monitor_large_heap(Process *p); +void monitor_generic(Process *p, Eterm type, Eterm spec); +Uint erts_trace_flag2bit(Eterm flag); +int erts_trace_flags(Eterm List, + Uint *pMask, Eterm *pTracer, int *pCpuTimestamp); +Eterm erts_bif_trace(int bif_index, Process* p, Eterm* args, BeamInstr *I); + +#ifdef ERTS_SMP +void erts_send_pending_trace_msgs(ErtsSchedulerData *esdp); +#define ERTS_SMP_CHK_PEND_TRACE_MSGS(ESDP) \ +do { \ + if ((ESDP)->pending_trace_msgs) \ + erts_send_pending_trace_msgs((ESDP)); \ +} while (0) +#else +#define ERTS_SMP_CHK_PEND_TRACE_MSGS(ESDP) +#endif + +#define seq_trace_output(token, msg, type, receiver, process) \ +seq_trace_output_generic((token), (msg), (type), (receiver), (process), NIL) +#define seq_trace_output_exit(token, msg, type, receiver, exitfrom) \ +seq_trace_output_generic((token), (msg), (type), (receiver), NULL, (exitfrom)) +void seq_trace_output_generic(Eterm token, Eterm msg, Uint type, + Eterm receiver, Process *process, Eterm exitfrom); + +int seq_trace_update_send(Process *process); + +Eterm erts_seq_trace(Process *process, + Eterm atom_type, Eterm atom_true_or_false, + int build_result); + +struct trace_pattern_flags { + unsigned int breakpoint : 1; /* Set if any other is set */ + unsigned int local : 1; /* Local call trace breakpoint */ + unsigned int meta : 1; /* Metadata trace breakpoint */ + unsigned int call_count : 1; /* Fast call count breakpoint */ + unsigned int call_time : 1; /* Fast call time breakpoint */ +}; +extern const struct trace_pattern_flags erts_trace_pattern_flags_off; +extern int erts_call_time_breakpoint_tracing; +int erts_set_trace_pattern(Eterm* mfa, int specified, + struct binary* match_prog_set, struct binary *meta_match_prog_set, + int on, struct trace_pattern_flags, + Eterm meta_tracer_pid); +void +erts_get_default_trace_pattern(int *trace_pattern_is_on, + struct binary **match_spec, + struct binary **meta_match_spec, + struct trace_pattern_flags *trace_pattern_flags, + Eterm *meta_tracer_pid); +void erts_bif_trace_init(void); + +#endif /* ERL_TRACE_H__ */ diff --git a/erts/emulator/beam/global.h b/erts/emulator/beam/global.h index 6713481a04..d91dd7d9ec 100644 --- a/erts/emulator/beam/global.h +++ b/erts/emulator/beam/global.h @@ -578,11 +578,35 @@ Eterm erts_realloc_binary(Eterm bin, size_t size); /* erl_bif_info.c */ +Eterm +erts_bld_port_info(Eterm **hpp, + ErlOffHeap *ohp, + Uint *szp, + Port *prt, + Eterm item); + void erts_bif_info_init(void); /* bif.c */ Eterm erts_make_ref(Process *); Eterm erts_make_ref_in_buffer(Eterm buffer[REF_THING_SIZE]); +void erts_make_ref_in_array(Uint32 ref[ERTS_MAX_REF_NUMBERS]); + +ERTS_GLB_INLINE Eterm +erts_proc_store_ref(Process *c_p, Uint32 ref[ERTS_MAX_REF_NUMBERS]); + +#if ERTS_GLB_INLINE_INCL_FUNC_DEF + +ERTS_GLB_INLINE Eterm +erts_proc_store_ref(Process *c_p, Uint32 ref[ERTS_MAX_REF_NUMBERS]) +{ + Eterm *hp = HAlloc(c_p, REF_THING_SIZE); + write_ref_thing(hp, ref[0], ref[1], ref[2]); + return make_internal_ref(hp); +} + +#endif + void erts_queue_monitor_message(Process *, ErtsProcLocks*, Eterm, @@ -596,13 +620,6 @@ Eterm erl_send(Process *p, Eterm to, Eterm msg); Eterm erl_is_function(Process* p, Eterm arg1, Eterm arg2); -/* erl_bif_port.c */ - -/* erl_bif_trace.c */ -Eterm erl_seq_trace_info(Process *p, Eterm arg1); -void erts_system_monitor_clear(Process *c_p); -void erts_system_profile_clear(Process *c_p); - /* beam_load.c */ typedef struct { BeamInstr* current; /* Pointer to: Mod, Name, Arity */ @@ -892,7 +909,6 @@ typedef struct { #define ERTS_SPAWN_DRIVER 1 #define ERTS_SPAWN_EXECUTABLE 2 #define ERTS_SPAWN_ANY (ERTS_SPAWN_DRIVER | ERTS_SPAWN_EXECUTABLE) - int erts_add_driver_entry(ErlDrvEntry *drv, DE_Handle *handle, int driver_list_locked); void erts_destroy_driver(erts_driver_t *drv); int erts_save_suspend_process_on_port(Port*, Process*); @@ -900,10 +916,6 @@ Port *erts_open_driver(erts_driver_t*, Eterm, char*, SysDriverOpts*, int *, int int erts_is_port_ioq_empty(Port *); void erts_terminate_port(Port *); void erts_init_io(int, int); -void erts_do_exit_port(Port *, Eterm, Eterm); -void erts_port_command(Process *, Eterm, Port *, Eterm); -Eterm erts_port_control(Process*, Port*, Uint, Eterm); -int erts_write_to_port(Eterm caller_id, Port *p, Eterm list); void erts_raw_port_command(Port*, byte*, Uint); void driver_report_exit(ErlDrvPort, int); LineBuf* allocate_linebuf(int); @@ -963,79 +975,6 @@ char *erts_convert_filename_to_native(Eterm name, ErtsAlcType_t alloc_type, int #define ERTS_UTF8_ERROR 2 #define ERTS_UTF8_ANALYZE_MORE 3 -/* erl_trace.c */ -void erts_init_trace(void); -void erts_trace_check_exiting(Eterm exiting); -Eterm erts_set_system_seq_tracer(Process *c_p, - ErtsProcLocks c_p_locks, - Eterm new); -Eterm erts_get_system_seq_tracer(void); -void erts_change_default_tracing(int setflags, Uint *flagsp, Eterm *tracerp); -void erts_get_default_tracing(Uint *flagsp, Eterm *tracerp); -void erts_set_system_monitor(Eterm monitor); -Eterm erts_get_system_monitor(void); - -#ifdef ERTS_SMP -void erts_check_my_tracer_proc(Process *); -void erts_block_sys_msg_dispatcher(void); -void erts_release_sys_msg_dispatcher(void); -void erts_foreach_sys_msg_in_q(void (*func)(Eterm, - Eterm, - Eterm, - ErlHeapFragment *)); -void erts_queue_error_logger_message(Eterm, Eterm, ErlHeapFragment *); -#endif - -void erts_send_sys_msg_proc(Eterm, Eterm, Eterm, ErlHeapFragment *); -void trace_send(Process*, Eterm, Eterm); -void trace_receive(Process*, Eterm); -Uint32 erts_call_trace(Process *p, BeamInstr mfa[], Binary *match_spec, Eterm* args, - int local, Eterm *tracer_pid); -void erts_trace_return(Process* p, BeamInstr* fi, Eterm retval, Eterm *tracer_pid); -void erts_trace_exception(Process* p, BeamInstr mfa[], Eterm class, Eterm value, - Eterm *tracer); -void erts_trace_return_to(Process *p, BeamInstr *pc); -void trace_sched(Process*, Eterm); -void trace_proc(Process*, Process*, Eterm, Eterm); -void trace_proc_spawn(Process*, Eterm pid, Eterm mod, Eterm func, Eterm args); -void save_calls(Process *p, Export *); -void trace_gc(Process *p, Eterm what); -/* port tracing */ -void trace_virtual_sched(Process*, Eterm); -void trace_sched_ports(Port *pp, Eterm); -void trace_sched_ports_where(Port *pp, Eterm, Eterm); -void trace_port(Port *, Eterm what, Eterm data); -void trace_port_open(Port *, Eterm calling_pid, Eterm drv_name); - -/* system_profile */ -void erts_set_system_profile(Eterm profile); -Eterm erts_get_system_profile(void); -void profile_scheduler(Eterm scheduler_id, Eterm); -void profile_scheduler_q(Eterm scheduler_id, Eterm state, Eterm no_schedulers, Uint Ms, Uint s, Uint us); -void profile_runnable_proc(Process* p, Eterm status); -void profile_runnable_port(Port* p, Eterm status); -void erts_system_profile_setup_active_schedulers(void); - -/* system_monitor */ -void monitor_long_gc(Process *p, Uint time); -void monitor_large_heap(Process *p); -void monitor_generic(Process *p, Eterm type, Eterm spec); -Uint erts_trace_flag2bit(Eterm flag); -int erts_trace_flags(Eterm List, - Uint *pMask, Eterm *pTracer, int *pCpuTimestamp); -Eterm erts_bif_trace(int bif_index, Process* p, Eterm* args, BeamInstr *I); - -#ifdef ERTS_SMP -void erts_send_pending_trace_msgs(ErtsSchedulerData *esdp); -#define ERTS_SMP_CHK_PEND_TRACE_MSGS(ESDP) \ -do { \ - if ((ESDP)->pending_trace_msgs) \ - erts_send_pending_trace_msgs((ESDP)); \ -} while (0) -#else -#define ERTS_SMP_CHK_PEND_TRACE_MSGS(ESDP) -#endif - void bin_write(int, void*, byte*, size_t); int intlist_to_buf(Eterm, char*, int); /* most callers pass plain char*'s */ @@ -1053,9 +992,16 @@ char* Sint_to_buf(Sint, struct Sint_buf*); #define ERTS_IOLIST_TYPE 2 Eterm buf_to_intlist(Eterm**, char*, size_t, Eterm); /* most callers pass plain char*'s */ -int io_list_to_buf(Eterm, char*, int); -int io_list_to_buf2(Eterm, char*, int); -int erts_iolist_size(Eterm, Uint *); + +#define ERTS_IOLIST_TO_BUF_OVERFLOW (~((ErlDrvSizeT) 0)) +#define ERTS_IOLIST_TO_BUF_TYPE_ERROR (~((ErlDrvSizeT) 1)) +#define ERTS_IOLIST_TO_BUF_FAILED(R) \ + (((R) & (~((ErlDrvSizeT) 1))) == (~((ErlDrvSizeT) 1))) +#define ERTS_IOLIST_TO_BUF_SUCCEEDED(R) \ + (!ERTS_IOLIST_TO_BUF_FAILED((R))) + +ErlDrvSizeT erts_iolist_to_buf(Eterm, char*, ErlDrvSizeT); +int erts_iolist_size(Eterm, ErlDrvSizeT *); int is_string(Eterm); void erl_at_exit(void (*) (void*), void*); Eterm collect_memory(Process *); @@ -1100,39 +1046,6 @@ Uint erts_current_reductions(Process* current, Process *p); int erts_print_system_version(int to, void *arg, Process *c_p); int erts_hibernate(Process* c_p, Eterm module, Eterm function, Eterm args, Eterm* reg); -#define seq_trace_output(token, msg, type, receiver, process) \ -seq_trace_output_generic((token), (msg), (type), (receiver), (process), NIL) -#define seq_trace_output_exit(token, msg, type, receiver, exitfrom) \ -seq_trace_output_generic((token), (msg), (type), (receiver), NULL, (exitfrom)) -void seq_trace_output_generic(Eterm token, Eterm msg, Uint type, - Eterm receiver, Process *process, Eterm exitfrom); - -int seq_trace_update_send(Process *process); - -Eterm erts_seq_trace(Process *process, - Eterm atom_type, Eterm atom_true_or_false, - int build_result); - -struct trace_pattern_flags { - unsigned int breakpoint : 1; /* Set if any other is set */ - unsigned int local : 1; /* Local call trace breakpoint */ - unsigned int meta : 1; /* Metadata trace breakpoint */ - unsigned int call_count : 1; /* Fast call count breakpoint */ - unsigned int call_time : 1; /* Fast call time breakpoint */ -}; -extern const struct trace_pattern_flags erts_trace_pattern_flags_off; -extern int erts_call_time_breakpoint_tracing; -int erts_set_trace_pattern(Eterm* mfa, int specified, - Binary* match_prog_set, Binary *meta_match_prog_set, - int on, struct trace_pattern_flags, - Eterm meta_tracer_pid); -void -erts_get_default_trace_pattern(int *trace_pattern_is_on, - Binary **match_spec, - Binary **meta_match_spec, - struct trace_pattern_flags *trace_pattern_flags, - Eterm *meta_tracer_pid); -void erts_bif_trace_init(void); /* ** Call_trace uses this API for the parameter matching functions diff --git a/erts/emulator/beam/io.c b/erts/emulator/beam/io.c index 6776f72894..2a55a7c09f 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; @@ -69,6 +71,11 @@ 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); @@ -254,9 +261,12 @@ static void insert_port_struct(void *vprt, Eterm data) erts_atomic32_init_relb(&prt->state, ERTS_PORT_SFLG_INITIALIZING); } +#define ERTS_CREATE_PORT_FLAG_PARALLELISM (1 << 0) + static Port *create_port(char *name, erts_driver_t *driver, erts_mtx_t *driver_lock, + int create_flags, Eterm pid, int *enop) { @@ -264,6 +274,7 @@ static Port *create_port(char *name, char *p; size_t port_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; @@ -373,6 +384,15 @@ static Port *create_port(char *name, ERTS_SMP_LC_ASSERT(erts_lc_is_port_locked(prt)); + if (erts_port_schedule_all_ops) + x_pts_flgs |= ERTS_PTS_FLG_FORCE_SCHED; + + if (create_flags & ERTS_CREATE_PORT_FLAG_PARALLELISM) + x_pts_flgs |= ERTS_PTS_FLG_PARALLELISM; + + 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; } @@ -525,6 +545,7 @@ erts_open_driver(erts_driver_t* driver, /* Pointer to driver. */ 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; @@ -599,7 +620,10 @@ erts_open_driver(erts_driver_t* driver, /* Pointer to driver. */ * to allow message sending and setting timers in the start function. */ - port = create_port(name, driver, driver_lock, pid, &port_errno); + if (opts->parallelism) + cprt_flgs |= ERTS_CREATE_PORT_FLAG_PARALLELISM; + + 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); @@ -713,6 +737,7 @@ 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; @@ -753,7 +778,11 @@ driver_create_port(ErlDrvPort creator_port_ix, /* Creating port */ erts_smp_rwmtx_runlock(&erts_driver_list_lock); - port = create_port(name, driver, driver_lock, pid, NULL); + /* 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); @@ -806,10 +835,15 @@ erts_smp_xports_unlock(Port *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) + erts_smp_xports_unlock(rprt); + state = erts_atomic32_read_nob(&rprt->state); + if ((state & ERTS_PORT_SFLG_CLOSING) && erts_is_port_ioq_empty(rprt)) + terminate_port(rprt); + erts_port_release(rprt); free_xplp = xplp; xplp = xplp->next; xports_list_free(free_xplp); @@ -849,8 +883,8 @@ 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; @@ -965,7 +999,7 @@ 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; \ @@ -1016,8 +1050,9 @@ 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; @@ -1028,7 +1063,7 @@ 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 */ @@ -1088,7 +1123,7 @@ 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; @@ -1103,267 +1138,1477 @@ 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)); +} 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; - SysIOVec iv[SMALL_WRITE_VEC]; - ErlDrvBinary* bv[SMALL_WRITE_VEC]; - SysIOVec* ivp; - ErlDrvBinary** bvp; - ErlDrvBinary* cbin; - ErlIOVec ev; + 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); - if (io_list_vec_len(list, &vsize, &csize, - &pvsize, &pcsize, &size)) { - goto bad_value; - } - /* To pack or not to pack (small binaries) ...? */ - vsize++; - if (vsize <= SMALL_WRITE_VEC) { - /* Do NOT pack */ - blimit = 0; - } 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)); + sp->fpe_was_unmasked = erts_block_fpe(); - /* Element 0 is for driver usage to add header block */ - 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); - } - 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); -#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); - } - 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); + return ERTS_TRY_IMM_DRV_CALL_OK; -#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"); - } -#endif +locked_fail: + erts_port_release(prt); + return res; +} - 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); - } +static ERTS_INLINE void +finalize_imm_drv_call(ErtsTryImmDrvCallState *sp) +{ + Port *prt = sp->port; + Process *c_p = sp->c_p; + + erts_unblock_fpe(sp->fpe_was_unmasked); + +#ifdef ERTS_SMP + if (prt->xports) + erts_smp_xports_unlock(prt); + ASSERT(!prt->xports); #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); - } - else if (r == -2) { - erts_free(ERTS_ALC_T_TMP, buf); - goto bad_value; - } - else { - ASSERT(r == -1); /* Overflow */ - erts_free(ERTS_ALC_T_TMP, buf); - if (erts_iolist_size(list, &size)) { - goto bad_value; - } - /* - * 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); + 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); + } +} + +#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 - if (DTRACE_ENABLED(driver_output)) { - DTRACE_FORMAT_COMMON_PID_AND_PORT(caller_id, p) - DTRACE4(driver_output, process_str, port_str, p->name, size); - } + , NIL #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); + ); +} + +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; } - } - 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); -#endif - p->caller = NIL; - return 0; + 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); - 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; + 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); } } -void erts_init_io(int port_tab_size, - int port_tab_size_ignore_files) + +ErtsPortOpResult +erts_schedule_proc2port_signal(Process *c_p, + Port *prt, + Eterm caller, + Eterm *refp, + ErtsProc2PortSigData *sigdp, + int task_flags, + ErtsProc2PortSigCallback callback) { - 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; + 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); -#ifdef ERTS_SMP - init_xports_list_alloc(); -#endif + /* + * 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; + } - pdl_init(); + ERTS_SMP_MSGQ_MV_INQ2PRIVQ(c_p); + c_p->msg.save = c_p->msg.last; - 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_proc_unlock(c_p, + (ERTS_PROC_LOCK_MAIN + | ERTS_PROC_LOCKS_MSG_RECEIVE)); } - 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); + sigdp->caller = caller; - erts_ptab_init_table(&erts_port, - ERTS_ALC_T_PORT_TABLE, - NULL, - (ErtsPTabElementCommon *) &erts_invalid_port.common, - port_tab_size, - "port_table"); + /* 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); - erts_smp_atomic_init_nob(&erts_bytes_out, 0); - erts_smp_atomic_init_nob(&erts_bytes_in, 0); + if (c_p) + erts_smp_proc_lock(c_p, ERTS_PROC_LOCK_MAIN); - sys_init_io(); + if (sched_res != 0) { + if (refp) + *refp = NIL; + return ERTS_PORT_OP_DROPPED; + } + return ERTS_PORT_OP_SCHEDULED; +} - erts_smp_tsd_set(driver_list_lock_status_key, (void *) 1); - erts_smp_rwmtx_rwlock(&erts_driver_list_lock); +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); - init_driver(&fd_driver, &fd_driver_entry, NULL); - init_driver(&vanilla_driver, &vanilla_driver_entry, NULL); - init_driver(&spawn_driver, &spawn_driver_entry, NULL); - for (dp = driver_tab; *dp != NULL; dp++) - erts_add_driver_entry(*dp, NULL, 1); + ERTS_SMP_CHK_NO_PROC_LOCKS; + ERTS_LC_ASSERT(erts_get_scheduler_id()); - erts_smp_tsd_set(driver_list_lock_status_key, NULL); - erts_smp_rwmtx_rwunlock(&erts_driver_list_lock); + 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; } + /* - * Buffering of data when using line oriented I/O on ports + * 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; + + return erts_schedule_proc2port_signal(c_p, + prt, + c_p->common.id, + refp, + sigdp, + 0, + port_badsig); +} -/* - * Buffer states - */ -#define LINEBUF_MAIN 0 -#define LINEBUF_FULL 1 -#define LINEBUF_CR_INSIDE 2 -#define LINEBUF_CR_AFTER 3 /* - * Creates a LineBuf to be added to the port structure, - * Returns: Pointer to a newly allocated and initialized LineBuf. - * Parameters: - * bufsiz - The (maximum) size of the line buffer. + * Driver outputv() callback */ -LineBuf *allocate_linebuf(bufsiz) -int bufsiz; + +static ERTS_INLINE void +call_driver_outputv(int bang_op, + Eterm caller, + Eterm from, + Port *prt, + erts_driver_t *drv, + ErlIOVec *evp) { - int ovsiz = (bufsiz < LINEBUF_INITIAL) ? bufsiz : LINEBUF_INITIAL; - LineBuf *lb = (LineBuf *) erts_alloc(ERTS_ALC_T_LINEBUF, - sizeof(LineBuf)+ovsiz); - lb->ovsiz = ovsiz; - lb->bufsiz = bufsiz; - lb->ovlen = 0; - lb->data[0] = LINEBUF_MAIN; /* state */ - return lb; -} + /* + * 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)); + +#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 { + +#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_flag, invalid_flags; + int task_flags; + ErtsProc2PortSigCallback port_sig_callback; + ErlDrvBinary *cbin = NULL; + ErlIOVec *evp = NULL; + char *buf = NULL; + + ASSERT((flags & ~(ERTS_PORT_SIG_FLG_BANG_OP + | ERTS_PORT_SIG_FLG_NOSUSPEND + | ERTS_PORT_SIG_FLG_FORCE)) == 0); + + busy_flag = ((flags & ERTS_PORT_SIG_FLG_FORCE) + ? ((erts_aint32_t) 0) + : ERTS_PTS_FLG_BUSY); + invalid_flags = busy_flag; + 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_flag|ERTS_PTS_FLG_EXIT)) + return ((sched_flags & busy_flag) + ? ERTS_PORT_OP_BUSY + : ERTS_PORT_OP_DROPPED); + + try_call = !(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->common.id, 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; + 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)) + 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) ...? */ + if (vsize < SMALL_WRITE_VEC) { + /* Do NOT pack */ + blimit = 0; + } + else { + /* Do pack */ + vsize = pvsize + 1; + csize = pcsize; + blimit = ERL_SMALL_IO_BIN_LIMIT; + } + /* Use vsize and csize from now on */ + + cbin = driver_alloc_binary(csize); + if (!cbin) + erts_alloc_enomem(ERTS_ALC_T_DRV_BINARY, ERTS_SIZEOF_Binary(csize)); + + /* Element 0 is for driver usage to add header block */ + ivp[0].iov_base = NULL; + ivp[0].iov_len = 0; + bvp[0] = NULL; + 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; + } +#if 0 + /* This assertion may say something useful, but it can + be falsified during the emulator test suites. */ + ASSERT(evp->vsize == vsize); +#endif + 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]); + } + 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 */ + 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->common.id, + from, + prt, + drv, + evp); + 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; + } + + /* 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 + + 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 + + } + + evp = new_evp; + } + + sigdp = erts_port_task_alloc_p2p_sig_data(); + 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 { + 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)); + } + try_call_state.pre_chk_sched_flags = 0; /* already checked */ + 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->common.id, + from, + prt, + drv, + buf, + size); + 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->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->common.id, + 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; + } + + if ((sched_flags & (busy_flag|ERTS_PTS_FLG_EXIT)) == ERTS_PTS_FLG_BUSY) + 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 + + 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 = 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; +} + +static ErtsPortOpResult +set_port_connected(int bang_op, + Eterm from, + Port *prt, + erts_aint32_t state, + Eterm connect) +{ + /* + * 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... + */ + + 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; + } + + 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; +} + +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 + 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 = 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); +} + +static void +port_unlink(Port *prt, Eterm from) +{ + ErtsLink *lnk = erts_remove_link(&ERTS_P_LINKS(prt), from); + if (lnk) + erts_destroy_link(lnk); +} + +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; + } + + sigdp = erts_port_task_alloc_p2p_sig_data(); + sigdp->flags = 0; + 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); +} + +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); + } + } + } +} + +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); +} + +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; + } + + sigdp = erts_port_task_alloc_p2p_sig_data(); + sigdp->flags = 0; + 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); +} + +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; + +#ifdef ERTS_SMP + init_xports_list_alloc(); +#endif + + 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; + } + + 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_rwmtx_rwlock(&erts_driver_list_lock); + + init_driver(&fd_driver, &fd_driver_entry, NULL); + init_driver(&vanilla_driver, &vanilla_driver_entry, NULL); + init_driver(&spawn_driver, &spawn_driver_entry, NULL); + for (dp = driver_tab; *dp != NULL; dp++) + erts_add_driver_entry(*dp, NULL, 1); + + erts_smp_tsd_set(driver_list_lock_status_key, NULL); + erts_smp_rwmtx_rwunlock(&erts_driver_list_lock); +} + +/* + * Buffering of data when using line oriented I/O on ports + */ + +/* + * Buffer states + */ +#define LINEBUF_MAIN 0 +#define LINEBUF_FULL 1 +#define LINEBUF_CR_INSIDE 2 +#define LINEBUF_CR_AFTER 3 + +/* + * Creates a LineBuf to be added to the port structure, + * Returns: Pointer to a newly allocated and initialized LineBuf. + * Parameters: + * bufsiz - The (maximum) size of the line buffer. + */ +LineBuf *allocate_linebuf(bufsiz) +int bufsiz; +{ + int ovsiz = (bufsiz < LINEBUF_INITIAL) ? bufsiz : LINEBUF_INITIAL; + LineBuf *lb = (LineBuf *) erts_alloc(ERTS_ALC_T_LINEBUF, + sizeof(LineBuf)+ovsiz); + lb->ovsiz = ovsiz; + lb->bufsiz = bufsiz; + lb->ovlen = 0; + lb->data[0] = LINEBUF_MAIN; /* state */ + return lb; +} /* * Initializes a LineBufContext to be used in calls to read_linebuf @@ -1526,16 +2771,19 @@ 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); @@ -2055,344 +3303,1228 @@ static void sweep_one_link(ErtsLink *lnk, void *vpsc) erts_destroy_link(lnk); } -/* 'from' is sending 'this_port' an exit signal, (this_port must be internal). - * If reason is normal we don't do anything, *unless* from is our connected - * process in which case we close the port. Any other reason kills the port. - * If 'from' is ourself we always die. - * When a driver has data in ioq then driver will be set to closing - * and become inaccessible to the processes. One exception exists and - * 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) +/* 'from' is sending 'this_port' an exit signal, (this_port must be internal). + * If reason is normal we don't do anything, *unless* from is our connected + * process in which case we close the port. Any other reason kills the port. + * If 'from' is ourself we always die. + * When a driver has data in ioq then driver will be set to closing + * and become inaccessible to the processes. One exception exists and + * that is to kill a port till reason kill. Then the port is stopped. + * + */ + +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)); + + rreason = (reason == am_kill) ? am_killed : reason; + +#ifdef USE_VM_PROBES + if (DTRACE_ENABLED(port_exit)) { + DTRACE_CHARBUF(from_str, DTRACE_TERM_BUF_SIZE); + DTRACE_CHARBUF(port_str, DTRACE_TERM_BUF_SIZE); + DTRACE_CHARBUF(rreason_str, 64); + + erts_snprintf(from_str, sizeof(from_str), "%T", from); + dtrace_port_str(p, port_str); + erts_snprintf(rreason_str, sizeof(rreason_str), "%T", rreason); + DTRACE4(port_exit, from_str, port_str, p->name, rreason_str); + } +#endif + + 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->common.id); + + /* + * Setting the port to not busy here, frees the list of pending + * processes and makes them runnable. + */ + set_busy_port((ErlDrvPort) p, 0); + + if (p->common.u.alive.reg != NULL) + (void) erts_unregister_name(NULL, 0, p, p->common.u.alive.reg->name); + + state = erts_atomic32_read_bor_relb(&p->state, ERTS_PORT_SFLG_EXITING); + + { + 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 = ERTS_P_MONITORS(p); + ERTS_P_MONITORS(p) = NULL; + erts_sweep_monitors(moni, &sweep_one_monitor, NULL); + } + DRV_MONITOR_UNLOCK_PDL(p); + + 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_atomic32_read_band_relb(&p->state, + ~ERTS_PORT_SFLG_DISTRIBUTION); + } + + if ((reason != am_kill) && !is_port_ioq_empty(p)) { + /* 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_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. +** +** ERTS_PORT_SFLG_CLOSING is a state where the port is in Limbo, waiting to +** pass on. All links are removed, and the port receives in/out-put events so +** as soon as the port queue gets empty terminate_port() is called. +*/ + + + +/* Command should be of the form +** {PID, close} +** {PID, {command, io-list}} +** {PID, {connect, New_PID}} +*/ +ErtsPortOpResult +erts_port_command(Process *c_p, + int flags, + Port *port, + Eterm command, + Eterm *refp) +{ + Eterm *tp; + + ASSERT(port); + + flags |= ERTS_PORT_SIG_FLG_BANG_OP; + + if (is_tuple_arity(command, 2)) { + Eterm cntd; + tp = tuple_val(command); + cntd = tp[1]; + if (is_internal_pid(cntd)) { + if (tp[2] == am_close) { + 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 (!(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); + } + } + } + } + + /* 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); + } +#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; +} + +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); + } +} + + +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)); + } + + 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(data, bytep, bitoffs, bitsize); + bufp = (char *) bytep; + size = binary_size(data); + } else { + int r; + + 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); + } + } + } + + 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; + } + + 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; + } + } + + /* Convert data into something that can be scheduled */ + + 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 = 0; + 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) { - ErtsLink *lnk; - Eterm rreason; - erts_aint32_t state; - - ERTS_SMP_CHK_NO_PROC_LOCKS; - ERTS_SMP_LC_ASSERT(erts_lc_is_port_locked(p)); + ErlDrvSSizeT cres; - rreason = (reason == am_kill) ? am_killed : reason; + if (!prt->drv_ptr->call) + return ERTS_PORT_OP_BADARG; #ifdef USE_VM_PROBES - if (DTRACE_ENABLED(port_exit)) { - DTRACE_CHARBUF(from_str, DTRACE_TERM_BUF_SIZE); - DTRACE_CHARBUF(port_str, DTRACE_TERM_BUF_SIZE); - DTRACE_CHARBUF(rreason_str, 64); + if (DTRACE_ENABLED(driver_call)) { + DTRACE_CHARBUF(process_str, DTRACE_TERM_BUF_SIZE); + DTRACE_CHARBUF(port_str, DTRACE_TERM_BUF_SIZE); - erts_snprintf(from_str, sizeof(from_str), "%T", from); - dtrace_port_str(p, port_str); - erts_snprintf(rreason_str, sizeof(rreason_str), "%T", rreason); - DTRACE4(port_exit, from_str, port_str, p->name, rreason_str); - } + dtrace_pid_str(caller, process_str); + dtrace_port_str(prt, port_str); + DTRACE5(driver_call, process_str, port_str, prt->name, command, size); + } #endif - state = erts_atomic32_read_nob(&p->state); - if ((state & (ERTS_PORT_SFLGS_DEAD|ERTS_PORT_SFLG_EXITING)) - || ((reason == am_normal) && - ((from != ERTS_PORT_GET_CONNECTED(p)) && (from != p->common.id)))) { - return; - } + prt->caller = caller; + cres = prt->drv_ptr->call((ErlDrvData) prt->drv_data, + command, + bufp, + size, + resp_bufp, + *from_size, + ret_flagsp); + prt->caller = NIL; - if (IS_TRACED_FL(p, F_TRACE_PORTS)) { - trace_port(p, am_closed, reason); - } + if (cres <= 0 + || ((byte) (*resp_bufp)[0]) != VERSION_MAGIC) + return ERTS_PORT_OP_BADARG; - erts_trace_check_exiting(p->common.id); + *from_size = (ErlDrvSizeT) cres; - /* - * Setting the port to not busy here, frees the list of pending - * processes and makes them runnable. - */ - set_busy_port((ErlDrvPort) p, 0); + return ERTS_PORT_OP_DONE; +} - if (p->common.u.alive.reg != NULL) - (void) erts_unregister_name(NULL, 0, p, p->common.u.alive.reg->name); - state = erts_atomic32_read_bor_relb(&p->state, ERTS_PORT_SFLG_EXITING); +static +void cleanup_scheduled_call(char *bufp) +{ + if (bufp) + erts_free(ERTS_ALC_T_DRV_CALL_DATA, bufp); +} - { - 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 = ERTS_P_MONITORS(p); - ERTS_P_MONITORS(p) = NULL; - erts_sweep_monitors(moni, &sweep_one_monitor, NULL); - } - DRV_MONITOR_UNLOCK_PDL(p); +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; - 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_atomic32_read_band_relb(&p->state, - ~ERTS_PORT_SFLG_DISTRIBUTION); - } - - if ((reason != am_kill) && !is_port_ioq_empty(p)) { - /* 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); - } -} + 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); + } + } + } -/* 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(). -** 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. -** -** ERTS_PORT_SFLG_CLOSING is a state where the port is in Limbo, waiting to -** pass on. All links are removed, and the port receives in/out-put events so -** as soon as the port queue gets empty terminate_port() is called. -*/ + port_sched_op_reply(sigdp->caller, sigdp->ref, am_badarg); +done: + if (resp_bufp != &resp_buf[0] && !(ret_flags & DRIVER_CALL_KEEP_BUFFER)) + driver_free(resp_bufp); -/* Command should be of the form -** {PID, close} -** {PID, {command, io-list}} -** {PID, {connect, New_PID}} -** -** -*/ -void erts_port_command(Process *proc, - Eterm caller_id, - Port *port, - Eterm command) + 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) { - Eterm *tp; - Eterm pid; + ErtsPortOpResult res; + char input_buf[256]; + char *bufp; + byte *endp; + ErlDrvSizeT size; + int try_call; + erts_aint32_t sched_flags; + ErtsProc2PortSigData *sigdp; - if (!port) - return; + sched_flags = erts_smp_atomic32_read_nob(&prt->sched.flags); + if (sched_flags & ERTS_PTS_FLG_EXIT) { + return ERTS_PORT_OP_BADARG; + } - erts_smp_proc_unlock(proc, ERTS_PROC_LOCK_MAIN); - ERTS_SMP_CHK_NO_PROC_LOCKS; - ASSERT(!INVALID_PORT(port, port->common.id)); + try_call = !(sched_flags & ERTS_PTS_FLGS_FORCE_SCHEDULE_OP); - if (is_tuple_arity(command, 2)) { - tp = tuple_val(command); - if ((pid = ERTS_PORT_GET_CONNECTED(port)) == tp[1]) { - /* PID must be connected */ - if (tp[2] == am_close) { - erts_atomic32_read_bor_relb(&port->state, - ERTS_PORT_SFLG_SEND_CLOSED); - erts_do_exit_port(port, pid, am_normal); + size = erts_encode_ext_size(data); -#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; - } 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 - ERTS_PORT_SET_CONNECTED_RELB(port, tp[2]); - deliver_result(port->common.id, pid, am_connected); - goto done; - } - } + 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; + } + 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; } } - { - ErtsProcLocks rp_locks = ERTS_PROC_LOCKS_XSIG_SEND; - Process* rp = erts_pid2proc(NULL, 0, - ERTS_PORT_GET_CONNECTED(port), rp_locks); - if (rp) { - (void) erts_send_exit_signal(NULL, - port->common.id, - rp, - &rp_locks, - am_badsig, - NIL, - NULL, - 0); - erts_smp_proc_unlock(rp, rp_locks); - } + /* 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; } - done: - erts_smp_proc_lock(proc, ERTS_PROC_LOCK_MAIN); -} -/* - * 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; + sigdp = erts_port_task_alloc_p2p_sig_data(); + sigdp->flags = 0; + 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; +} - ERTS_SMP_LC_ASSERT(erts_lc_is_port_locked(prt)); +static Eterm +make_port_info_term(Eterm **hpp_start, + Eterm **hpp, + Uint *hszp, + ErlHeapFragment **bpp, + Port *prt, + Eterm item) +{ + ErlOffHeap *ohp; - if ((control = prt->drv_ptr->control) == NULL) { - return THE_NON_VALUE; + 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; + } + 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]); + } - /* - * 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) { - ERTS_DECLARE_DUMMY(Uint bitoffs); - ERTS_DECLARE_DUMMY(Uint bitsize); - ERTS_GET_BINARY_BYTES(iolist, to_port, bitoffs, bitsize); - to_len = binary_size(iolist); - } else { - int r; + if (value[0] == am_undefined) { + start++; + len--; + } - /* 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; + erts_bld_list(NULL, hszp, len, &value[start]); - /* - * 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; - } - 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); + *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; } - prt->caller = p->common.id; /* Internal pid */ + sigdp = erts_port_task_alloc_p2p_sig_data(); + sigdp->flags = 0; + sigdp->u.info.item = item; - erts_smp_proc_unlock(p, ERTS_PROC_LOCK_MAIN); - ERTS_SMP_CHK_NO_PROC_LOCKS; + return erts_schedule_proc2port_signal(c_p, + prt, + c_p->common.id, + retvalp, + sigdp, + 0, + port_sig_info); +} -#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); - } -#endif +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); - /* - * Call the port's control routine. - */ + 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; +} - 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); +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; } - 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. - */ + sigdp = erts_port_task_alloc_p2p_sig_data(); + sigdp->flags = 0; + 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; +} - if (n < 0) { - return THE_NON_VALUE; - } +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; - 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); + 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 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; + } + 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; } - 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); + 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); } - return make_binary(hbin); + *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 = 0; + + return erts_schedule_proc2port_signal(c_p, + prt, + c_p->common.id, + retvalp, + sigdp, + 0, + port_sig_get_data); } typedef struct { @@ -2459,7 +4591,7 @@ print_port_info(Port *p, int to, void *arg) } void -set_busy_port(ErlDrvPort port_num, int on) +set_busy_port(ErlDrvPort dprt, int on) { Port *prt; erts_aint32_t flags; @@ -2470,34 +4602,38 @@ set_busy_port(ErlDrvPort port_num, int on) ERTS_SMP_CHK_NO_PROC_LOCKS; - prt = erts_drvport2port_raw(port_num); + prt = erts_drvport2port_raw(dprt); if (!prt) return; if (on) { - flags = erts_smp_atomic32_read_bor_nob(&prt->sched.flags, - ERTS_PTS_FLG_BUSY); + flags = erts_smp_atomic32_read_bor_acqb(&prt->sched.flags, + ERTS_PTS_FLG_BUSY); if (flags & ERTS_PTS_FLG_BUSY) 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", prt->id); + "%T", prt->common.id); DTRACE1(port_busy, port_str); } #endif } else { ErtsProcList *plp; - flags = erts_smp_atomic32_read_band_nob(&prt->sched.flags, - ~ERTS_PTS_FLG_BUSY); + flags = erts_smp_atomic32_read_band_acqb(&prt->sched.flags, + ~ERTS_PTS_FLG_BUSY); if (!(flags & ERTS_PTS_FLG_BUSY)) return; /* Already non-busy */ #ifdef USE_VM_PROBES if (DTRACE_ENABLED(port_not_busy)) { erts_snprintf(port_str, sizeof(port_str), - "%T", prt->id); + "%T", prt->common.id); DTRACE1(port_not_busy, port_str); } #endif @@ -2539,7 +4675,7 @@ set_busy_port(ErlDrvPort port_num, int on) ErtsProcList* plp2 = plp; erts_snprintf(port_str, sizeof(port_str), - "%T", erts_port[port_num]); + "%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); @@ -3748,8 +5884,7 @@ 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) { @@ -4705,13 +6840,13 @@ driver_failure_term(ErlDrvPort ix, Eterm term, int 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->common.id, eof ? am_normal : term); + erts_deliver_port_exit(prt, prt->common.id, eof ? am_normal : term, 0); } return 0; } diff --git a/erts/emulator/beam/sys.h b/erts/emulator/beam/sys.h index fd6f34e96e..9c3f9551c7 100644 --- a/erts/emulator/beam/sys.h +++ b/erts/emulator/beam/sys.h @@ -564,7 +564,7 @@ __decl_noreturn void __noreturn erl_exit(int n, char*, ...); #define ERTS_DUMP_EXIT (INT_MIN + 2) /* crash dump; then exit() */ #define ERTS_INTERNAL_ERROR(What) \ - erl_exit(ERTS_ABORT_EXIT, "%s:%d:%s(): Internal error: %s", \ + erl_exit(ERTS_ABORT_EXIT, "%s:%d:%s(): Internal error: %s\n", \ __FILE__, __LINE__, __func__, What) Eterm erts_check_io_info(void *p); @@ -641,6 +641,7 @@ typedef struct _SysDriverOpts { char *wd; /* Working directory. */ unsigned spawn_type; /* Bitfield of ERTS_SPAWN_DRIVER | ERTS_SPAWN_EXTERNAL | both*/ + int parallelism; /* Optimize for parallelism */ } SysDriverOpts; extern char *erts_default_arg0; diff --git a/erts/emulator/beam/utils.c b/erts/emulator/beam/utils.c index fb203c6076..164bed51d1 100644 --- a/erts/emulator/beam/utils.c +++ b/erts/emulator/beam/utils.c @@ -3017,12 +3017,13 @@ buf_to_intlist(Eterm** hpp, char *buf, size_t len, Eterm tail) ** ; ** ** Return remaining bytes in buffer on success -** -1 on overflow -** -2 on type error (including that result would not be a whole number of bytes) +** ERTS_IOLIST_TO_BUF_OVERFLOW on overflow +** ERTS_IOLIST_TO_BUF_TYPE_ERROR on type error (including that result would not be a whole number of bytes) */ -int io_list_to_buf(Eterm obj, char* buf, int len) +ErlDrvSizeT erts_iolist_to_buf(Eterm obj, char* buf, ErlDrvSizeT alloced_len) { + ErlDrvSizeT len = (ErlDrvSizeT) alloced_len; Eterm* objp; DECLARE_ESTACK(s); goto L_again; @@ -3115,20 +3116,20 @@ int io_list_to_buf(Eterm obj, char* buf, int len) L_type_error: DESTROY_ESTACK(s); - return -2; + return ERTS_IOLIST_TO_BUF_TYPE_ERROR; L_overflow: DESTROY_ESTACK(s); - return -1; + return ERTS_IOLIST_TO_BUF_OVERFLOW; } /* * Return 0 if successful, and non-zero if unsuccessful. */ -int erts_iolist_size(Eterm obj, Uint* sizep) +int erts_iolist_size(Eterm obj, ErlDrvSizeT* sizep) { Eterm* objp; - Uint size = 0; + Uint size = 0; /* Intentionally Uint due to halfword heap */ DECLARE_ESTACK(s); goto L_again; @@ -3180,7 +3181,7 @@ int erts_iolist_size(Eterm obj, Uint* sizep) #undef SAFE_ADD DESTROY_ESTACK(s); - *sizep = size; + *sizep = (ErlDrvSizeT) size; return ERTS_IOLIST_OK; L_overflow_error: diff --git a/erts/emulator/test/busy_port_SUITE.erl b/erts/emulator/test/busy_port_SUITE.erl index 3a29fd4d68..32e907ca69 100644 --- a/erts/emulator/test/busy_port_SUITE.erl +++ b/erts/emulator/test/busy_port_SUITE.erl @@ -148,9 +148,9 @@ message_order(Config) when is_list(Config) -> send_to_busy_1(Parent) -> {Owner, Slave} = get_slave(), - Slave ! {Owner, {command, "set_me_busy"}}, - Slave ! {Owner, {command, "hello"}}, - Slave ! {Owner, {command, "hello again"}}, + (catch port_command(Slave, "set_me_busy")), + (catch port_command(Slave, "hello")), + (catch port_command(Slave, "hello again")), receive Message -> Parent ! {self(), Message} @@ -193,10 +193,10 @@ system_monitor(Config) when is_list(Config) -> ?line Busy = spawn_link( fun() -> - Slave ! {Owner,{command,"set busy"}}, + (catch port_command(Slave, "set busy")), receive {Parent,alpha} -> ok end, - Slave ! {Owner,{command,"busy"}}, - Slave ! {Owner,{command,"free"}}, + (catch port_command(Slave, "busy")), + (catch port_command(Slave, "free")), Parent ! {self(),alpha}, command(lock), receive {Parent,beta} -> ok end, @@ -212,7 +212,7 @@ system_monitor(Config) when is_list(Config) -> ?line Void = rec(Void), ?line Busy ! {self(), beta}, ?line {monitor,Owner,busy_port,Slave} = rec(Void), - ?line Master ! {Owner, {command, "u"}}, + ?line port_command(Master, "u"), ?line {Busy,beta} = rec(Void), ?line Void = rec(Void), ?line _NewMonitor = erlang:system_monitor(OldMonitor), @@ -296,9 +296,9 @@ no_trap_exit_process(ResultTo, Link, Config) -> linked -> ok; unlink -> unlink(Slave) end, - ?line Slave ! {self(), {command, "lock port"}}, + ?line (catch port_command(Slave, "lock port")), ?line ResultTo ! {self(), port_created, Slave}, - ?line Slave ! {self(), {command, "suspend me"}}, + ?line (catch port_command(Slave, "suspend me")), ok. %% Assuming the following scenario, @@ -339,9 +339,9 @@ busy_port_exit_process(ResultTo, Config) -> ?line load_busy_driver(Config), ?line _Master = open_port({spawn, "busy_drv master"}, [eof]), ?line Slave = open_port({spawn, "busy_drv slave"}, [eof]), - ?line Slave ! {self(), {command, "lock port"}}, + ?line (catch port_command(Slave, "lock port")), ?line ResultTo ! {self(), port_created, Slave}, - ?line Slave ! {self(), {command, "suspend me"}}, + ?line (catch port_command(Slave, "suspend me")), receive {'EXIT', Slave, die} -> ResultTo ! {self(), ok}; @@ -383,8 +383,8 @@ multiple_writers(Config) when is_list(Config) -> quick_writer() -> {Owner, Port} = get_slave(), - Port ! {Owner, {command, "port to busy"}}, - Port ! {Owner, {command, "lock me"}}, + (catch port_command(Port, "port to busy")), + (catch port_command(Port, "lock me")), ok. hard_busy_driver(Config) when is_list(Config) -> @@ -644,11 +644,11 @@ loop(Master, Slave) -> Pid ! {busy_drv_reply, {self(), Slave}}, loop(Master, Slave); {Pid, unlock} -> - Master ! {self(), {command, "u"}}, + port_command(Master, "u"), Pid ! {busy_drv_reply, ok}, loop(Master, Slave); {Pid, lock} -> - Master ! {self(), {command, "l"}}, + port_command(Master, "l"), Pid ! {busy_drv_reply, ok}, loop(Master, Slave); {Pid, {port_command,Data}} -> diff --git a/erts/emulator/test/ddll_SUITE.erl b/erts/emulator/test/ddll_SUITE.erl index 6e15c228cd..4675cab15c 100644 --- a/erts/emulator/test/ddll_SUITE.erl +++ b/erts/emulator/test/ddll_SUITE.erl @@ -136,8 +136,8 @@ delayed_unload_with_ports(Config) when is_list(Config) -> ?line {ok,pending_driver,Ref} = erl_ddll:try_unload(echo_drv,[{monitor, pending_driver}]), ?line ok = receive _ -> false after 0 -> ok end, ?line Port ! {self(), close}, - ?line 1 = erl_ddll:info(echo_drv, port_count), ?line ok = receive {Port,closed} -> ok after 1000 -> false end, + ?line 1 = erl_ddll:info(echo_drv, port_count), ?line Port2 ! {self(), close}, ?line ok = receive {Port2,closed} -> ok after 1000 -> false end, ?line ok = receive {'DOWN', Ref, driver, echo_drv, unloaded} -> ok after 1000 -> false end, diff --git a/erts/emulator/test/port_SUITE.erl b/erts/emulator/test/port_SUITE.erl index 0a1ef5a78f..b00e7f0b59 100644 --- a/erts/emulator/test/port_SUITE.erl +++ b/erts/emulator/test/port_SUITE.erl @@ -90,7 +90,7 @@ mix_up_ports/1, otp_5112/1, otp_5119/1, otp_6224/1, exit_status_multi_scheduling_block/1, ports/1, spawn_driver/1, spawn_executable/1, close_deaf_port/1, - unregister_name/1]). + unregister_name/1, parallelism_option/1]). -export([]). @@ -114,7 +114,8 @@ all() -> stderr_to_stdout, otp_3906, otp_4389, win_massive, mix_up_ports, otp_5112, otp_5119, exit_status_multi_scheduling_block, ports, spawn_driver, - spawn_executable, close_deaf_port, unregister_name]. + spawn_executable, close_deaf_port, unregister_name, + parallelism_option]. groups() -> [{stream, [], [stream_small, stream_big]}, @@ -1364,6 +1365,43 @@ spawn_driver(Config) when is_list(Config) -> ?line test_server:timetrap_cancel(Dog), ok. +parallelism_option(suite) -> + []; +parallelism_option(doc) -> + ["Test parallelism option of open_port"]; +parallelism_option(Config) when is_list(Config) -> + ?line Dog = test_server:timetrap(test_server:seconds(10)), + ?line Path = ?config(data_dir, Config), + ?line ok = load_driver(Path, "echo_drv"), + ?line Port = erlang:open_port({spawn_driver, "echo_drv"}, + [{parallelism, true}]), + ?line {parallelism, true} = erlang:port_info(Port, parallelism), + ?line Port ! {self(), {command, "Hello port!"}}, + ?line receive + {Port, {data, "Hello port!"}} = Msg1 -> + io:format("~p~n", [Msg1]), + ok; + Other -> + test_server:fail({unexpected, Other}) + end, + ?line Port ! {self(), close}, + ?line receive {Port, closed} -> ok end, + + ?line Port2 = erlang:open_port({spawn_driver, "echo_drv -Hello port?"}, + [{parallelism, false}]), + ?line {parallelism, false} = erlang:port_info(Port2, parallelism), + ?line receive + {Port2, {data, "Hello port?"}} = Msg2 -> + io:format("~p~n", [Msg2]), + ok; + Other2 -> + test_server:fail({unexpected2, Other2}) + end, + ?line Port2 ! {self(), close}, + ?line receive {Port2, closed} -> ok end, + ?line test_server:timetrap_cancel(Dog), + ok. + spawn_executable(suite) -> []; spawn_executable(doc) -> @@ -1632,6 +1670,7 @@ otp_5112(Config) when is_list(Config) -> ?line ?t:format("Links1: ~p~n",[Links1]), ?line true = lists:member(Port, Links1), ?line Port ! {self(), {command, ""}}, + ?line wait_until(fun () -> lists:member(Port, erlang:ports()) == false end), ?line {links, Links2} = process_info(self(),links), ?line ?t:format("Links2: ~p~n",[Links2]), ?line false = lists:member(Port, Links2), %% This used to fail @@ -1703,38 +1742,8 @@ otp_5119_fill_empty_port_tab(Ports) -> ?line LastPort end. --define(DEF_MAX_PORTS, 1024). - -max_ports_env() -> - ?line case os:getenv("ERL_MAX_PORTS") of - EMP when is_list(EMP) -> - case catch list_to_integer(EMP) of - Int when is_integer(Int) -> ?line Int; - _ -> ?line false - end; - _ -> ?line false - end. - max_ports() -> - ?line PreMaxPorts - = case max_ports_env() of - Env when is_integer(Env) -> ?line Env; - _ -> - ?line case os:type() of - {unix, _} -> - ?line UlimStr = string:strip(os:cmd("ulimit -n") - -- "\n"), - ?line case catch list_to_integer(UlimStr) of - Ulim when is_integer(Ulim) -> ?line Ulim; - _ -> ?line ?DEF_MAX_PORTS - end; - _ -> ?line ?DEF_MAX_PORTS - end - end, - ?line case PreMaxPorts > ?DEF_MAX_PORTS of - true -> ?line PreMaxPorts; - false -> ?line ?DEF_MAX_PORTS - end. + erlang:system_info(port_limit). port_ix(Port) when is_port(Port) -> ?line ["#Port",_,PortIxStr] = string:tokens(erlang:port_to_list(Port), @@ -2344,5 +2353,12 @@ close_deaf_port_1(N, Cmd) -> _:eagain -> {comment, "Could not spawn more than " ++ integer_to_list(N) ++ " OS processes."} end. - +wait_until(Fun) -> + case catch Fun() of + true -> + ok; + _ -> + receive after 100 -> ok end, + wait_until(Fun) + end. diff --git a/erts/etc/common/erlexec.c b/erts/etc/common/erlexec.c index 7805530b50..29e423d363 100644 --- a/erts/etc/common/erlexec.c +++ b/erts/etc/common/erlexec.c @@ -125,6 +125,7 @@ static char *pluss_val_switches[] = { "ct", "wt", "ss", + "pp", NULL }; /* +h arguments with values */ @@ -813,6 +814,7 @@ int main(int argc, char **argv) case 'A': case 'b': case 'i': + case 'n': case 'P': case 'Q': case 'S': diff --git a/erts/preloaded/ebin/erlang.beam b/erts/preloaded/ebin/erlang.beam index b78747bc84..c87b87233a 100644 Binary files a/erts/preloaded/ebin/erlang.beam and b/erts/preloaded/ebin/erlang.beam differ diff --git a/erts/preloaded/ebin/erts_internal.beam b/erts/preloaded/ebin/erts_internal.beam new file mode 100644 index 0000000000..27ca76b676 Binary files /dev/null and b/erts/preloaded/ebin/erts_internal.beam differ diff --git a/erts/preloaded/ebin/prim_inet.beam b/erts/preloaded/ebin/prim_inet.beam index b2f3ab6c5b..ae9c17bbcb 100644 Binary files a/erts/preloaded/ebin/prim_inet.beam and b/erts/preloaded/ebin/prim_inet.beam differ diff --git a/erts/preloaded/src/Makefile b/erts/preloaded/src/Makefile index 145638802f..5502ad588b 100644 --- a/erts/preloaded/src/Makefile +++ b/erts/preloaded/src/Makefile @@ -40,7 +40,8 @@ PRE_LOADED_MODULES = \ zlib \ prim_zip \ otp_ring0 \ - erlang + erlang \ + erts_internal RELSYSDIR = $(RELEASE_PATH)/lib/erts-$(VSN) # not $(RELEASE_PATH)/erts-$(VSN)/preloaded diff --git a/erts/preloaded/src/erlang.erl b/erts/preloaded/src/erlang.erl index 1cbce5b80b..7d0c93c8d3 100644 --- a/erts/preloaded/src/erlang.erl +++ b/erts/preloaded/src/erlang.erl @@ -46,6 +46,10 @@ -export([gather_sched_wall_time_result/1, await_sched_wall_time_modifications/2]). +-export([port_command/2, port_command/3, port_connect/2, port_close/1, + port_control/3, port_call/2, port_call/3, port_info/1, port_info/2, + port_set_data/2, port_get_data/1]). + -deprecated([hash/2]). % Get rid of autoimports of spawn to avoid clashes with ourselves. @@ -405,6 +409,174 @@ suspend_process(P) -> Res -> Res end. +%% +%% Port BIFs +%% +%% Currently all port BIFs calls the corresponding +%% erts_internal:port_*() native function which perform +%% most of the actual work. These native functions should +%% *never* be called directly by other functionality. The +%% native functions may be changed, or removed without any +%% notice whatsoever! +%% +%% IMPORTANT NOTE: +%% When the erts_internal:port_*() native functions return +%% a reference, they have also internally prepared the +%% message queue of the caller for a receive that will +%% unconditionally wait for a message containing this +%% reference. If the erlang code calling these native +%% functions do not do this, subsequent receives will not +%% work as expected! That is, it is of *vital importance* +%% that the receive is performed as described above! +%% + +-spec erlang:port_command(Port, Data) -> 'true' when + Port :: port() | atom(), + Data :: iodata(). + +port_command(Port, Data) -> + case case erts_internal:port_command(Port, Data, []) of + Ref when is_reference(Ref) -> receive {Ref, Res} -> Res end; + Res -> Res + end of + true -> true; + Error -> erlang:error(Error, [Port, Data]) + end. + +-spec erlang:port_command(Port, Data, [Flag]) -> boolean() when + Port :: port() | atom(), + Data :: iodata(), + Flag :: force | nosuspend. + +port_command(Port, Data, Flags) -> + case case erts_internal:port_command(Port, Data, Flags) of + Ref when is_reference(Ref) -> receive {Ref, Res} -> Res end; + Res -> Res + end of + Bool when Bool == true; Bool == false -> Bool; + Error -> erlang:error(Error, [Port, Data, Flags]) + end. + +-spec erlang:port_connect(Port, Pid) -> 'true' when + Port :: port() | atom(), + Pid :: pid(). + +port_connect(Port, Pid) -> + case case erts_internal:port_connect(Port, Pid) of + Ref when is_reference(Ref) -> receive {Ref, Res} -> Res end; + Res -> Res + end of + true -> true; + Error -> erlang:error(Error, [Port, Pid]) + end. + + +-spec erlang:port_close(Port) -> 'true' when + Port :: port() | atom(). + +port_close(Port) -> + case case erts_internal:port_close(Port) of + Ref when is_reference(Ref) -> receive {Ref, Res} -> Res end; + Res -> Res + end of + true -> true; + Error -> erlang:error(Error, [Port]) + end. + +-spec erlang:port_control(Port, Command, Data) -> iodata() | binary() when + Port :: port() | atom(), + Command :: integer(), + Data :: iodata(). + +port_control(Port, Command, Data) -> + case case erts_internal:port_control(Port, Command, Data) of + Ref when is_reference(Ref) -> receive {Ref, Res} -> Res end; + Res -> Res + end of + badarg -> erlang:error(badarg, [Port, Command, Data]); + Result -> Result + end. + +-spec erlang:port_call(Port, Data) -> term() when + Port :: port() | atom(), + Data :: term(). + +port_call(Port, Data) -> + case case erts_internal:port_call(Port, 0, Data) of + Ref when is_reference(Ref) -> receive {Ref, Res} -> Res end; + Res -> Res + end of + {ok, Result} -> Result; + Error -> erlang:error(Error, [Port, Data]) + end. + +-spec erlang:port_call(Port, Command, Data) -> term() when + Port :: port() | atom(), + Command :: integer(), + Data :: term(). + +port_call(Port, Command, Data) -> + case case erts_internal:port_call(Port, Command, Data) of + Ref when is_reference(Ref) -> receive {Ref, Res} -> Res end; + Res -> Res + end of + {ok, Result} -> Result; + Error -> erlang:error(Error, [Port, Command, Data]) + end. + +-spec erlang:port_info(Port) -> [{Item, Info}] when + Port :: port() | atom(), + Item :: 'registered_name' | 'id' | 'connected' | 'links' | 'name' | 'input' | 'output', + Info :: term(). + +port_info(Port) -> + case case erts_internal:port_info(Port) of + Ref when is_reference(Ref) -> receive {Ref, Res} -> Res end; + Res -> Res + end of + badarg -> erlang:error(badarg, [Port]); + Result -> Result + end. + +-spec erlang:port_info(Port, Item) -> [{Item, Info}] when + Port :: port() | atom(), + Item :: 'registered_name' | 'id' | 'connected' | 'links' | 'monitors' | 'name' | 'input' | 'output' | 'memory' | 'queue_size' | 'locking', + Info :: term(). + +port_info(Port, Item) -> + case case erts_internal:port_info(Port, Item) of + Ref when is_reference(Ref) -> receive {Ref, Res} -> Res end; + Res -> Res + end of + badarg -> erlang:error(badarg, [Port, Item]); + Result -> Result + end. + +-spec erlang:port_set_data(Port, Data) -> 'true' when + Port :: port() | atom(), + Data :: term(). + +port_set_data(Port, Data) -> + case case erts_internal:port_set_data(Port, Data) of + Ref when is_reference(Ref) -> receive {Ref, Res} -> Res end; + Res -> Res + end of + badarg -> erlang:error(badarg, [Port, Data]); + Result -> Result + end. + +-spec erlang:port_get_data(Port) -> term() when + Port :: port() | atom(). + +port_get_data(Port) -> + case case erts_internal:port_get_data(Port) of + Ref when is_reference(Ref) -> receive {Ref, Res} -> Res end; + Res -> Res + end of + {ok, Data} -> Data; + Error -> erlang:error(Error, [Port]) + end. + %% %% If the emulator wants to perform a distributed command and %% a connection is not established to the actual node the following diff --git a/erts/preloaded/src/erts_internal.erl b/erts/preloaded/src/erts_internal.erl new file mode 100644 index 0000000000..8bd7e95f03 --- /dev/null +++ b/erts/preloaded/src/erts_internal.erl @@ -0,0 +1,41 @@ +%% +%% %CopyrightBegin% +%% +%% Copyright Ericsson AB 2012. All Rights Reserved. +%% +%% The contents of this file are subject to the Erlang Public License, +%% Version 1.1, (the "License"); you may not use this file except in +%% compliance with the License. You should have received a copy of the +%% Erlang Public License along with this software. If not, it can be +%% retrieved online at http://www.erlang.org/. +%% +%% Software distributed under the License is distributed on an "AS IS" +%% basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See +%% the License for the specific language governing rights and limitations +%% under the License. +%% +%% %CopyrightEnd% +%% + +%% +%% As the module name imply, this module is here for ERTS internal +%% functionality. As an application programmer you should *never* +%% call anything in this module directly. Functions exported by +%% this module may change behaviour or be removed at any time +%% without any notice whatsoever. Everything in this module is +%% intentionally left undocumented, and should remain so. +%% + +-module(erts_internal). + +-export([await_port_send_result/3]). + +%% +%% Await result of send to port +%% + +await_port_send_result(Ref, Busy, Ok) -> + receive + {Ref, false} -> Busy; + {Ref, _} -> Ok + end. diff --git a/lib/hipe/cerl/erl_bif_types.erl b/lib/hipe/cerl/erl_bif_types.erl index 0c2e846010..645ec71c3c 100644 --- a/lib/hipe/cerl/erl_bif_types.erl +++ b/lib/hipe/cerl/erl_bif_types.erl @@ -1153,59 +1153,66 @@ type(erlang, phash2, 2, Xs) -> strict(arg_types(erlang, phash2, 2), Xs, fun (_) -> t_non_neg_integer() end); type(erlang, pid_to_list, 1, Xs) -> strict(arg_types(erlang, pid_to_list, 1), Xs, fun (_) -> t_string() end); -type(erlang, port_call, Arity, Xs) when Arity =:= 2; Arity =:= 3 -> - strict(arg_types(erlang, port_call, Arity), Xs, fun (_) -> t_any() end); -type(erlang, port_close, 1, Xs) -> - strict(arg_types(erlang, port_close, 1), Xs, - fun (_) -> t_atom('true') end); -type(erlang, port_command, 2, Xs) -> - strict(arg_types(erlang, port_command, 2), Xs, - fun (_) -> t_atom('true') end); -type(erlang, port_command, 3, Xs) -> - strict(arg_types(erlang, port_command, 3), Xs, - fun (_) -> t_boolean() end); -type(erlang, port_connect, 2, Xs) -> - strict(arg_types(erlang, port_connect, 2), Xs, - fun (_) -> t_atom('true') end); -type(erlang, port_control, 3, Xs) -> - strict(arg_types(erlang, port_control, 3), Xs, - fun (_) -> t_sup(t_string(), t_binary()) end); -type(erlang, port_get_data, 1, Xs) -> - strict(arg_types(erlang, port_get_data, 1), Xs, fun (_) -> t_any() end); -type(erlang, port_info, 1, Xs) -> - strict(arg_types(erlang, port_info, 1), Xs, - fun (_) -> t_sup(t_atom('undefined'), t_list()) end); -type(erlang, port_info, 2, Xs) -> - strict(arg_types(erlang, port_info, 2), Xs, +type(erts_internal, port_call, 3, Xs) -> + strict(arg_types(erts_internal, port_call, 3), Xs, + fun (_) -> t_sup([t_atom('badarg'), t_reference(), t_tuple(['ok', t_any()])]) end); +type(erts_internal, port_close, 1, Xs) -> + strict(arg_types(erts_internal, port_close, 1), Xs, + fun (_) -> t_sup([t_atom('badarg'), t_atom('true'), t_reference()]) end); +type(erts_internal, port_command, 3, Xs) -> + strict(arg_types(erts_internal, port_command, 3), Xs, + fun (_) -> t_sup([t_atom('badarg'), t_boolean(), t_reference()]) end); +type(erts_internal, port_connect, 2, Xs) -> + strict(arg_types(erts_internal, port_connect, 2), Xs, + fun (_) -> t_sup([t_atom('badarg'), t_atom('true'), t_reference()]) end); +type(erts_internal, port_control, 3, Xs) -> + strict(arg_types(erts_internal, port_control, 3), Xs, + fun (_) -> t_sup([t_atom('badarg'), t_reference(), t_string(), t_binary()]) end); +type(erts_internal, port_get_data, 1, Xs) -> + strict(arg_types(erts_internal, port_get_data, 1), Xs, + fun (_) -> t_sup([t_atom('badarg'), t_reference(), t_tuple(['ok', t_any()])]) end); +type(erts_internal, port_info, 1, Xs) -> + [_, PossibleItems] =arg_types(erts_internal, port_info, 2), + strict(arg_types(erts_internal, port_info, 1), Xs, + fun (_) -> t_sup([t_atom('badarg'), t_atom('undefined'), t_reference(), t_list(t_tuple([PossibleItems, t_any()]))]) end); +type(erts_internal, port_info, 2, Xs) -> + strict(arg_types(erts_internal, port_info, 2), Xs, fun ([_Port, Item]) -> - t_sup(t_atom('undefined'), - case t_atom_vals(Item) of + t_sup([t_atom('undefined'), + t_atom('badarg'), + t_reference(), + case t_atom_vals(Item) of ['connected'] -> t_tuple([Item, t_pid()]); ['id'] -> t_tuple([Item, t_integer()]); ['input'] -> t_tuple([Item, t_integer()]); ['links'] -> t_tuple([Item, t_list(t_pid())]); ['name'] -> t_tuple([Item, t_string()]); ['output'] -> t_tuple([Item, t_integer()]); - ['registered_name'] -> t_tuple([Item, t_atom()]); + ['registered_name'] -> t_sup(t_tuple([Item, t_atom()]), t_nil()); + ['monitors'] -> t_tuple([Item, t_list(t_tuple([t_atom('process'), t_pid()]))]); + ['memory'] -> t_tuple([Item, t_integer()]); + ['queue_size'] -> t_tuple([Item, t_integer()]); + ['locking'] -> t_tuple([Item, t_sup([t_atom('false'), t_atom('port_level'), t_atom('driver_level')])]); + ['parallelism'] -> t_tuple([Item, t_boolean()]); List when is_list(List) -> t_tuple([t_sup([t_atom(A) || A <- List]), t_sup([t_atom(), t_integer(), t_pid(), t_list(t_pid()), t_string()])]); unknown -> - [_, PosItem] = arg_types(erlang, port_info, 2), + [_, PosItem] = arg_types(erts_internal, port_info, 2), t_tuple([PosItem, t_sup([t_atom(), t_integer(), t_pid(), t_list(t_pid()), t_string()])]) - end) + end]) end); type(erlang, port_to_list, 1, Xs) -> strict(arg_types(erlang, port_to_list, 1), Xs, fun (_) -> t_string() end); type(erlang, ports, 0, _) -> t_list(t_port()); -type(erlang, port_set_data, 2, Xs) -> - strict(arg_types(erlang, port_set_data, 2), Xs, - fun (_) -> t_atom('true') end); +type(erts_internal, port_set_data, 2, Xs) -> + strict(arg_types(erts_internal, port_set_data, 2), Xs, + fun (_) -> t_sup([t_atom('badarg'), t_atom('true'), t_reference()]) end); type(erlang, pre_loaded, 0, _) -> t_list(t_atom()); type(erlang, process_display, 2, _) -> t_atom('true'); type(erlang, process_flag, 2, Xs) -> @@ -1638,6 +1645,12 @@ type(erlang, system_info, 1, Xs) -> t_string()); ['otp_release'] -> t_string(); + ['port_parallelism'] -> + t_boolean(); + ['port_count'] -> + t_non_neg_fixnum(); + ['port_limit'] -> + t_non_neg_fixnum(); ['process_count'] -> t_non_neg_fixnum(); ['process_limit'] -> @@ -3757,7 +3770,8 @@ arg_types(erlang, open_port, 2) -> t_tuple([t_atom('cd'), t_string()]), t_tuple([t_atom('env'), t_list(t_tuple(2))]), % XXX: More t_tuple([t_atom('args'), t_list(ArgT)]), - t_tuple([t_atom('arg0'), ArgT])])))]; + t_tuple([t_atom('arg0'), ArgT]), + t_tuple([t_atom('parallelism'), t_boolean()])])))]; arg_types(erlang, phash, 2) -> [t_any(), t_pos_integer()]; arg_types(erlang, phash2, 1) -> @@ -3766,35 +3780,32 @@ arg_types(erlang, phash2, 2) -> [t_any(), t_pos_integer()]; arg_types(erlang, pid_to_list, 1) -> [t_pid()]; -arg_types(erlang, port_call, 2) -> - [t_sup(t_port(), t_atom()), t_any()]; -arg_types(erlang, port_call, 3) -> +arg_types(erts_internal, port_call, 3) -> [t_sup(t_port(), t_atom()), t_integer(), t_any()]; -arg_types(erlang, port_close, 1) -> +arg_types(erts_internal, port_close, 1) -> [t_sup(t_port(), t_atom())]; -arg_types(erlang, port_command, 2) -> - [t_sup(t_port(), t_atom()), t_sup(t_iolist(), t_binary())]; -arg_types(erlang, port_command, 3) -> +arg_types(erts_internal, port_command, 3) -> [t_sup(t_port(), t_atom()), t_sup(t_iolist(), t_binary()), t_list(t_atoms(['force', 'nosuspend']))]; -arg_types(erlang, port_connect, 2) -> +arg_types(erts_internal, port_connect, 2) -> [t_sup(t_port(), t_atom()), t_pid()]; -arg_types(erlang, port_control, 3) -> +arg_types(erts_internal, port_control, 3) -> [t_sup(t_port(), t_atom()), t_integer(), t_sup(t_iolist(), t_binary())]; -arg_types(erlang, port_get_data, 1) -> +arg_types(erts_internal, port_get_data, 1) -> [t_sup(t_port(), t_atom())]; -arg_types(erlang, port_info, 1) -> +arg_types(erts_internal, port_info, 1) -> [t_sup(t_port(), t_atom())]; -arg_types(erlang, port_info, 2) -> +arg_types(erts_internal, port_info, 2) -> [t_sup(t_port(), t_atom()), t_atoms(['registered_name', 'id', 'connected', - 'links', 'name', 'input', 'output'])]; + 'links', 'name', 'input', 'output', + 'monitors', 'memory', 'queue_size', 'locking', 'parallelism'])]; arg_types(erlang, port_to_list, 1) -> [t_port()]; arg_types(erlang, ports, 0) -> []; -arg_types(erlang, port_set_data, 2) -> +arg_types(erts_internal, port_set_data, 2) -> [t_sup(t_port(), t_atom()), t_any()]; arg_types(erlang, pre_loaded, 0) -> []; diff --git a/lib/sasl/src/systools_make.erl b/lib/sasl/src/systools_make.erl index 61e660e918..806f597675 100644 --- a/lib/sasl/src/systools_make.erl +++ b/lib/sasl/src/systools_make.erl @@ -1497,7 +1497,8 @@ mandatory_modules() -> preloaded() -> %% Sorted - [erl_prim_loader,erlang,init,otp_ring0,prim_file,prim_inet, prim_zip,zlib]. + [erl_prim_loader,erlang,erts_internal,init,otp_ring0,prim_file,prim_inet, + prim_zip,zlib]. %%______________________________________________________________________ %% Kernel processes; processes that are specially treated by the init diff --git a/system/doc/reference_manual/ports.xml b/system/doc/reference_manual/ports.xml index 4847dd67cd..c4e4ef1d35 100644 --- a/system/doc/reference_manual/ports.xml +++ b/system/doc/reference_manual/ports.xml @@ -87,8 +87,14 @@ of bytes, the option binary must be included.

The port owner Pid can communicate with the port Port by sending and receiving messages. (In fact, any - process can send the messages to the port, but the messages from - the port always go to the port owner).

+ process can send the messages to the port, but the port owner must + be identified in the message).

+

As of OTP-R16 messages sent to ports are delivered truly + asynchronously. The underlying implementation previously + delivered messages to ports synchronously. Message passing has + however always been documented as an asynchronous operation, so + this should not be an issue for an Erlang program communicating + with ports, unless false assumptions about ports has been made.

Below, Data must be an I/O list. An I/O list is a binary or a (possibly deep) list of binaries or integers in the range 0..255.

@@ -127,8 +133,7 @@ Messages Received From a Port.

Instead of sending and receiving messages, there are also a - number of BIFs that can be used. These can be called by any - process, not only the port owner.

+ number of BIFs that can be used.

port_command(Port,Data) -- cgit v1.2.3