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-rw-r--r--erts/doc/src/erlang.xml239
-rw-r--r--erts/emulator/beam/bif.c410
-rw-r--r--erts/emulator/beam/erl_bif_info.c100
-rw-r--r--erts/emulator/beam/erl_bif_port.c6
-rw-r--r--erts/emulator/beam/erl_port.h58
-rw-r--r--erts/emulator/beam/erl_process.c21
-rw-r--r--erts/emulator/beam/io.c390
-rw-r--r--erts/emulator/beam/register.c51
-rw-r--r--erts/emulator/beam/register.h2
-rw-r--r--erts/emulator/test/monitor_SUITE.erl12
-rw-r--r--erts/emulator/test/port_SUITE.erl434
-rw-r--r--erts/emulator/test/port_SUITE_data/Makefile.src2
-rw-r--r--erts/emulator/test/port_SUITE_data/sleep_failure_drv.c76
-rw-r--r--erts/preloaded/src/erlang.erl19
14 files changed, 1370 insertions, 450 deletions
diff --git a/erts/doc/src/erlang.xml b/erts/doc/src/erlang.xml
index e0c3fed0c2..fa13e4c142 100644
--- a/erts/doc/src/erlang.xml
+++ b/erts/doc/src/erlang.xml
@@ -2916,107 +2916,105 @@ os_prompt% </pre>
<func>
<name name="monitor" arity="2" clause_i="1"/>
<name name="monitor" arity="2" clause_i="2"/>
+ <name name="monitor" arity="2" clause_i="3"/>
<fsummary>Starts monitoring.</fsummary>
<type name="registered_name"/>
<type name="registered_process_identifier"/>
<type name="monitor_process_identifier"/>
+ <type name="monitor_port_identifier"/>
<desc>
- <p>Send a monitor request of type <c><anno>Type</anno></c> to the
- entity identified by <c><anno>Item</anno></c>. The caller of
- <c>monitor/2</c> will later be notified by a monitor message on the
- following format if the monitored state is changed:</p>
+ <p>Sends a monitor request of type <c><anno>Type</anno></c> to the
+ entity identified by <c><anno>Item</anno></c>. If the monitored entity
+ does not exist or when it dies, the caller of <c>monitor/2</c> will
+ be notified by a message on the following format:</p>
<code type="none">{Tag, <anno>MonitorRef</anno>, <anno>Type</anno>, Object, Info}</code>
<note><p>The monitor request is an asynchronous signal. That is, it
takes time before the signal reaches its destination.</p></note>
- <p>Valid <c><anno>Type</anno></c>s:</p>
- <taglist>
- <tag><marker id="monitor_process"/><c>process</c></tag>
- <item>
- <p>Monitor the existence of the process identified by
- <c><anno>Item</anno></c>. Valid
- <c><anno>Item</anno></c>s in combination with the
- <c>process <anno>Type</anno></c> can be any of the following:</p>
- <taglist>
- <tag><c>pid()</c></tag>
- <item>
- <p>The process identifier of the process to monitor.</p>
- </item>
- <tag><c>{RegisteredName, Node}</c></tag>
- <item>
- <p>A tuple consisting of a registered name of a process and
- a node name. The process residing on the node <c>Node</c>
- with the registered name <c>{RegisteredName, Node}</c> will
- be monitored.</p>
- </item>
- <tag><c>RegisteredName</c></tag>
- <item>
- <p>The process locally registered as <c>RegisteredName</c>
- will become monitored.</p>
- </item>
- </taglist>
- <note><p>When a registered name is used, the
- process that has the registered name when the
- monitor request reach its destination will be monitored.
- The monitor is not effected if the registered name is
- unregistered, or unregistered and later registered on another
- process.</p></note>
- <p>The monitor is triggered either when the monitored process
- terminates, is non existing, or if the connection to it is
- lost. In the case the connection to it is lost, we do not know
- if it still exist or not. After this type of monitor has been
- triggered, the monitor is automatically removed.</p>
- <p>When the monitor is triggered a <c>'DOWN'</c> message is
- sent to the monitoring process. A <c>'DOWN'</c> message has
- the following pattern:</p>
- <code type="none">{'DOWN', MonitorRef, Type, Object, Info}</code>
- <p>Here <c>MonitorRef</c> and <c>Type</c> are the same as
- described earlier, and:</p>
- <taglist>
- <tag><c>Object</c></tag>
- <item>
- <p>equals:</p>
- <taglist>
- <tag><c><anno>Item</anno></c></tag>
- <item>If <c><anno>Item</anno></c> is specified by a
- process identifier.</item>
- <tag><c>{RegisteredName, Node}</c></tag>
- <item>If <c><anno>Item</anno></c> is specified as
- <c>RegisteredName</c>, or <c>{RegisteredName, Node}</c>
- where <c>Node</c> corresponds to the node that the
- monitored process resides on.</item>
- </taglist>
- </item>
- <tag><c>Info</c></tag>
- <item>
- <p>Either the exit reason of the process, <c>noproc</c>
- (non-existing process), or <c>noconnection</c> (no
- connection to the node where the monitored process
- resides).</p></item>
- </taglist>
- <p>The monitoring is turned off when the <c>'DOWN'</c>
- message is sent or when
- <seealso marker="#demonitor/1">demonitor/1</seealso>
- is called.</p>
- <p>If an attempt is made to monitor a process on an older node
- (where remote process monitoring is not implemented or
- where remote process monitoring by registered name is not
- implemented), the call fails with <c>badarg</c>.</p>
- <note>
- <p>The format of the <c>'DOWN'</c> message changed in ERTS
- version 5.2 (OTP R9B) for monitoring
- <em>by registered name</em>. Element <c>Object</c> of
- the <c>'DOWN'</c> message could in earlier versions
- sometimes be the process identifier of the monitored process and sometimes
- be the registered name. Now element <c>Object</c> is
- always a tuple consisting of the registered name and
- the node name. Processes on new nodes (ERTS version 5.2
- or higher) always get <c>'DOWN'</c> messages on
- the new format even if they are monitoring processes on old
- nodes. Processes on old nodes always get <c>'DOWN'</c>
- messages on the old format.</p>
- </note>
- </item>
- <tag><marker id="monitor_time_offset"/><c>time_offset</c></tag>
+
+ <p><c><anno>Type</anno></c> can be one of the following atoms:
+ <c>process</c>, <c>port</c> or <c>time_offset</c>.</p>
+
+ <p>A monitor is triggered only once, after that it is removed from
+ both monitoring process and the monitored entity.
+ Monitors are fired when the monitored process or port terminates,
+ does not exist at the moment of creation, or if the connection to
+ it is lost. In the case with connection, we lose knowledge about
+ the fact if it still exists or not. The monitoring is also turned off
+ when <seealso marker="#demonitor/1">demonitor/1</seealso>
+ is called.</p>
+
+ <p>When monitoring by name please note, that the <c>RegisteredName</c>
+ is resolved to <c>pid()</c> or <c>port()</c> only once
+ at the moment of monitor instantiation, later changes to the name
+ registration will not affect the existing monitor.</p>
+
+ <p>When a monitor is triggered, a <c>'DOWN'</c> message that has the
+ following pattern <c>{'DOWN', MonitorRef, Type, Object, Info}</c>
+ is sent to the monitoring process.</p>
+
+ <p>In monitor message <c>MonitorRef</c> and <c>Type</c> are the same as
+ described earlier, and:</p>
+ <taglist>
+ <tag><c>Object</c></tag>
+ <item>
+ <p>The monitored entity, which triggered the event. When monitoring
+ a local process or port, <c>Object</c> will be equal to the
+ <c>pid()</c> or <c>port()</c> that was being monitored. When
+ monitoring process or port by name, <c>Object</c> will have format
+ <c>{RegisteredName, Node}</c> where <c>RegisteredName</c> is the
+ name which has been used with <c>monitor/2</c> call and
+ <c>Node</c> is local or remote node name (for ports monitored by
+ name, <c>Node</c> is always local node name).</p>
+ </item>
+ <tag><c>Info</c></tag>
+ <item>
+ <p>Either the exit reason of the process, <c>noproc</c>
+ (process or port did not exist at the time of monitor creation),
+ or <c>noconnection</c> (no connection to the node where the
+ monitored process resides). </p></item>
+ </taglist>
+
+ <p>If an attempt is made to monitor a process on an older node
+ (where remote process monitoring is not implemented or
+ where remote process monitoring by registered name is not
+ implemented), the call fails with <c>badarg</c>.</p>
+ <note>
+ <p>The format of the <c>'DOWN'</c> message changed in ERTS
+ version 5.2 (OTP R9B) for monitoring
+ <em>by registered name</em>. Element <c>Object</c> of
+ the <c>'DOWN'</c> message could in earlier versions
+ sometimes be the process identifier of the monitored process and sometimes
+ be the registered name. Now element <c>Object</c> is
+ always a tuple consisting of the registered name and
+ the node name. Processes on new nodes (ERTS version 5.2
+ or higher) always get <c>'DOWN'</c> messages on
+ the new format even if they are monitoring processes on old
+ nodes. Processes on old nodes always get <c>'DOWN'</c>
+ messages on the old format.</p>
+ </note>
+
+ <taglist>
+ <tag>Monitoring a <marker id="monitor_process"/><c>process</c></tag>
+ <item>
+ <p>Creates monitor between the current process and another
+ process identified by <c><anno>Item</anno></c>, which can be a
+ <c>pid()</c> (local or remote), an atom <c>RegisteredName</c> or
+ a tuple <c>{RegisteredName, Node}</c> for a registered process,
+ located elsewhere.</p>
+ </item>
+
+ <tag>Monitoring a <marker id="monitor_port"/><c>port</c></tag>
+ <item>
+ <p>Creates monitor between the current process and a port
+ identified by <c><anno>Item</anno></c>, which can be a
+ <c>port()</c> (only local), an atom <c>RegisteredName</c> or
+ a tuple <c>{RegisteredName, Node}</c> for a registered port,
+ located on this node. Note, that attempt to monitor a remote port
+ will result in <c>badarg</c>.</p>
+ </item>
+
+ <tag>Monitoring a
+ <marker id="monitor_time_offset"/><c>time_offset</c></tag>
<item>
<p>Monitor changes in
<seealso marker="#time_offset/0">time offset</seealso>
@@ -3072,15 +3070,17 @@ os_prompt% </pre>
Note that you can observe the change of the time offset
when calling <c>erlang:time_offset()</c> before you
get the <c>'CHANGE'</c> message.</p>
-
</item>
</taglist>
+
<p>Making several calls to <c>monitor/2</c> for the same
- <c><anno>Item</anno></c> and/or <c><anno>Type</anno></c> is not
- an error; it results in as many independent monitoring instances.</p>
+ <c><anno>Item</anno></c> and/or <c><anno>Type</anno></c> is not
+ an error; it results in as many independent monitoring instances.</p>
+
<p>The monitor functionality is expected to be extended. That is,
- other <c><anno>Type</anno></c>s and <c><anno>Item</anno></c>s
- are expected to be supported in a future release.</p>
+ other <c><anno>Type</anno></c>s and <c><anno>Item</anno></c>s
+ are expected to be supported in a future release.</p>
+
<note>
<p>If or when <c>monitor/2</c> is extended, other
possible values for <c>Tag</c>, <c>Object</c> and
@@ -4150,6 +4150,22 @@ os_prompt% </pre>
<func>
<name name="port_info" arity="2" clause_i="8"/>
+ <fsummary>Which processes are monitoring this port.</fsummary>
+ <desc>
+ <p>Returns list of pids that are monitoring given port at the
+ moment.</p>
+ <p>If the port identified by <c><anno>Port</anno></c> is not open,
+ <c>undefined</c> is returned. If the port is closed and the
+ calling process was previously linked to the port, the exit
+ signal from the port is guaranteed to be delivered before
+ <c>port_info/2</c> returns <c>undefined</c>.</p>
+ <p>Failure: <c>badarg</c> if <c><anno>Port</anno></c> is not a local
+ port identifier, or an atom.</p>
+ </desc>
+ </func>
+
+ <func>
+ <name name="port_info" arity="2" clause_i="9"/>
<fsummary>Information about the name of a port.</fsummary>
<desc>
<p><c><anno>Name</anno></c> is the command name set by
@@ -4165,7 +4181,7 @@ os_prompt% </pre>
</func>
<func>
- <name name="port_info" arity="2" clause_i="9"/>
+ <name name="port_info" arity="2" clause_i="10"/>
<fsummary>Information about the OS pid of a port.</fsummary>
<desc>
<p><c><anno>OsPid</anno></c> is the process identifier (or equivalent)
@@ -4184,7 +4200,7 @@ os_prompt% </pre>
</func>
<func>
- <name name="port_info" arity="2" clause_i="10"/>
+ <name name="port_info" arity="2" clause_i="11"/>
<fsummary>Information about the output of a port.</fsummary>
<desc>
<p><c><anno>Bytes</anno></c> is the total number of bytes written
@@ -4203,7 +4219,7 @@ os_prompt% </pre>
</func>
<func>
- <name name="port_info" arity="2" clause_i="11"/>
+ <name name="port_info" arity="2" clause_i="12"/>
<fsummary>Information about the parallelism hint of a port.</fsummary>
<desc>
<p><c><anno>Boolean</anno></c> corresponds to the port parallelism
@@ -4214,7 +4230,7 @@ os_prompt% </pre>
</func>
<func>
- <name name="port_info" arity="2" clause_i="12"/>
+ <name name="port_info" arity="2" clause_i="13"/>
<fsummary>Information about the queue size of a port.</fsummary>
<desc>
<p><c><anno>Bytes</anno></c> is the total number
@@ -4231,7 +4247,7 @@ os_prompt% </pre>
</func>
<func>
- <name name="port_info" arity="2" clause_i="13"/>
+ <name name="port_info" arity="2" clause_i="14"/>
<fsummary>Information about the registered name of a port.</fsummary>
<desc>
<p><c><anno>RegisteredName</anno></c> is the registered name of
@@ -4865,10 +4881,19 @@ os_prompt% </pre>
<p>A list of monitors (started by <c>monitor/2</c>)
that are active for the process. For a local process
monitor or a remote process monitor by a process
- identifier, the list item is <c>{process, <anno>Pid</anno>}</c>.
- For a remote process
- monitor by name, the list item is
- <c>{process, {<anno>RegName</anno>, <anno>Node</anno>}}</c>.</p>
+ identifier, the list consists of:</p>
+ <taglist>
+ <tag><c>{process, <anno>Pid</anno>}</c></tag>
+ <item>Process is monitored by pid.</item>
+ <tag><c>{process, {<anno>RegName</anno>, <anno>Node</anno>}}</c></tag>
+ <item>Local or remote process is monitored by name.</item>
+ <tag><c>{port, PortId}</c></tag>
+ <item>Local port is monitored by port id.</item>
+ <tag><c>{port, {<anno>RegName</anno>, <anno>Node</anno>}}</c></tag>
+ <item>Local port is monitored by name. Please note, that
+ remote port monitors are not supported, so <c>Node</c> will
+ always be the local node name.</item>
+ </taglist>
</item>
<tag><c>{message_queue_data, <anno>MQD</anno>}</c></tag>
<item>
diff --git a/erts/emulator/beam/bif.c b/erts/emulator/beam/bif.c
index b18910e2c7..fc14061a44 100644
--- a/erts/emulator/beam/bif.c
+++ b/erts/emulator/beam/bif.c
@@ -282,20 +282,17 @@ res_no_proc: {
}
}
-#define ERTS_DEMONITOR_FALSE 2
-#define ERTS_DEMONITOR_TRUE 1
-#define ERTS_DEMONITOR_BADARG 0
-#define ERTS_DEMONITOR_YIELD_TRUE -1
-#define ERTS_DEMONITOR_INTERNAL_ERROR -2
-
-static int
+/* This function is allowed to return range of values handled by demonitor/1-2
+ * Namely: atoms true, false, yield, internal_error, badarg or THE_NON_VALUE
+ */
+static Eterm
remote_demonitor(Process *c_p, DistEntry *dep, Eterm ref, Eterm to)
{
ErtsDSigData dsd;
ErtsMonitor *dmon;
ErtsMonitor *mon;
int code;
- int res;
+ Eterm res = am_false;
#ifndef ERTS_SMP
int stale_mon = 0;
#endif
@@ -328,7 +325,7 @@ remote_demonitor(Process *c_p, DistEntry *dep, Eterm ref, Eterm to)
mon = erts_remove_monitor(&ERTS_P_MONITORS(c_p), ref);
erts_smp_proc_unlock(c_p, ERTS_PROC_LOCK_LINK);
- res = ERTS_DEMONITOR_TRUE;
+ res = am_true;
break;
case ERTS_DSIG_PREP_CONNECTED:
@@ -352,7 +349,7 @@ remote_demonitor(Process *c_p, DistEntry *dep, Eterm ref, Eterm to)
* This is possible when smp support is enabled.
* 'DOWN' message just arrived.
*/
- res = ERTS_DEMONITOR_TRUE;
+ res = am_true;
}
else {
/*
@@ -367,16 +364,13 @@ remote_demonitor(Process *c_p, DistEntry *dep, Eterm ref, Eterm to)
: mon->pid),
ref,
0);
- res = (code == ERTS_DSIG_SEND_YIELD
- ? ERTS_DEMONITOR_YIELD_TRUE
- : ERTS_DEMONITOR_TRUE);
+ res = (code == ERTS_DSIG_SEND_YIELD ? am_yield : am_true);
erts_destroy_monitor(dmon);
-
}
break;
default:
ASSERT(! "Invalid dsig prepare result");
- return ERTS_DEMONITOR_INTERNAL_ERROR;
+ return am_internal_error;
}
#ifndef ERTS_SMP
@@ -404,27 +398,96 @@ remote_demonitor(Process *c_p, DistEntry *dep, Eterm ref, Eterm to)
return res;
}
-static int demonitor(Process *c_p, Eterm ref, Eterm *multip)
+static ERTS_INLINE void
+demonitor_local_process(Process *c_p, Eterm ref, Eterm to, Eterm *res)
+{
+ Process *rp = erts_pid2proc_opt(c_p,
+ ERTS_PROC_LOCK_MAIN|ERTS_PROC_LOCK_LINK,
+ to,
+ ERTS_PROC_LOCK_LINK,
+ ERTS_P2P_FLG_ALLOW_OTHER_X);
+ ErtsMonitor *mon = erts_remove_monitor(&ERTS_P_MONITORS(c_p), ref);
+
+#ifndef ERTS_SMP
+ ASSERT(mon);
+#else
+ if (!mon)
+ *res = am_false;
+ else
+#endif
+ {
+ *res = am_true;
+ erts_destroy_monitor(mon);
+ }
+ if (rp) {
+ ErtsMonitor *rmon;
+ rmon = erts_remove_monitor(&ERTS_P_MONITORS(rp), ref);
+ if (rp != c_p)
+ erts_smp_proc_unlock(rp, ERTS_PROC_LOCK_LINK);
+ if (rmon != NULL)
+ erts_destroy_monitor(rmon);
+ }
+ else {
+ ERTS_SMP_ASSERT_IS_NOT_EXITING(c_p);
+ }
+}
+
+static ERTS_INLINE BIF_RETTYPE
+demonitor_local_port(Process *origin, Eterm ref, Eterm target)
{
- ErtsMonitor *mon = NULL; /* The monitor entry to delete */
- Process *rp; /* Local target process */
- Eterm to = NIL; /* Monitor link traget */
- DistEntry *dep = NULL; /* Target's distribution entry */
- int deref_de = 0;
- int res;
- int unlock_link = 1;
+ BIF_RETTYPE res = am_false;
+ Port *port = erts_port_lookup_raw(target);
+
+ if (!port) {
+ BIF_ERROR(origin, BADARG);
+ }
+ erts_smp_proc_unlock(origin, ERTS_PROC_LOCK_LINK);
+
+ if (port) {
+ Eterm trap_ref;
+ switch (erts_port_demonitor(origin, ERTS_PORT_DEMONITOR_NORMAL,
+ port, ref, &trap_ref)) {
+ case ERTS_PORT_OP_DROPPED:
+ case ERTS_PORT_OP_BADARG:
+ break;
+ case ERTS_PORT_OP_SCHEDULED:
+ BIF_TRAP3(await_port_send_result_trap, origin, trap_ref,
+ am_busy_port, am_true);
+ /* the busy_port atom will never be returned, because it cannot be
+ * returned from erts_port_(de)monitor, but just in case if in future
+ * internal API changes - you may see this atom */
+ default:
+ break;
+ }
+ }
+ else {
+ ERTS_SMP_ASSERT_IS_NOT_EXITING(origin);
+ }
+ BIF_RET(res);
+}
+/* Can return atom true, false, yield, internal_error, badarg or
+ * THE_NON_VALUE if error occured or trap has been set up
+ */
+static
+BIF_RETTYPE demonitor(Process *c_p, Eterm ref, Eterm *multip)
+{
+ ErtsMonitor *mon = NULL; /* The monitor entry to delete */
+ Eterm to = NIL; /* Monitor link traget */
+ DistEntry *dep = NULL; /* Target's distribution entry */
+ int deref_de = 0;
+ BIF_RETTYPE res = am_false;
+ int unlock_link = 1;
erts_smp_proc_lock(c_p, ERTS_PROC_LOCK_LINK);
if (is_not_internal_ref(ref)) {
- res = ERTS_DEMONITOR_BADARG;
+ res = am_badarg;
goto done; /* Cannot be this monitor's ref */
}
mon = erts_lookup_monitor(ERTS_P_MONITORS(c_p), ref);
if (!mon) {
- res = ERTS_DEMONITOR_FALSE;
goto done;
}
@@ -432,70 +495,50 @@ static int demonitor(Process *c_p, Eterm ref, Eterm *multip)
case MON_TIME_OFFSET:
*multip = am_true;
erts_demonitor_time_offset(ref);
- res = ERTS_DEMONITOR_TRUE;
+ res = am_true;
break;
case MON_ORIGIN:
to = mon->pid;
*multip = am_false;
if (is_atom(to)) {
- /* Monitoring a name at node to */
- ASSERT(is_node_name_atom(to));
- dep = erts_sysname_to_connected_dist_entry(to);
- ASSERT(dep != erts_this_dist_entry);
- if (dep)
- deref_de = 1;
+ /* Monitoring a name at node to */
+ ASSERT(is_node_name_atom(to));
+ dep = erts_sysname_to_connected_dist_entry(to);
+ ASSERT(dep != erts_this_dist_entry);
+ if (dep)
+ deref_de = 1;
+ } else if (is_port(to)) {
+ if (port_dist_entry(to) != erts_this_dist_entry) {
+ goto badarg;
+ }
+ res = demonitor_local_port(c_p, ref, to);
+ unlock_link = 0;
+ goto done;
} else {
- ASSERT(is_pid(to));
- dep = pid_dist_entry(to);
+ ASSERT(is_pid(to));
+ dep = pid_dist_entry(to);
}
if (dep != erts_this_dist_entry) {
- res = remote_demonitor(c_p, dep, ref, to);
- /* remote_demonitor() unlocks link lock on c_p */
- unlock_link = 0;
+ res = remote_demonitor(c_p, dep, ref, to);
+ /* remote_demonitor() unlocks link lock on c_p */
+ unlock_link = 0;
}
else { /* Local monitor */
- if (deref_de) {
- deref_de = 0;
- erts_deref_dist_entry(dep);
- }
- dep = NULL;
- rp = erts_pid2proc_opt(c_p,
- ERTS_PROC_LOCK_MAIN|ERTS_PROC_LOCK_LINK,
- to,
- ERTS_PROC_LOCK_LINK,
- ERTS_P2P_FLG_ALLOW_OTHER_X);
- mon = erts_remove_monitor(&ERTS_P_MONITORS(c_p), ref);
-#ifndef ERTS_SMP
- ASSERT(mon);
-#else
- if (!mon)
- res = ERTS_DEMONITOR_FALSE;
- else
-#endif
- {
- res = ERTS_DEMONITOR_TRUE;
- erts_destroy_monitor(mon);
- }
- if (rp) {
- ErtsMonitor *rmon;
- rmon = erts_remove_monitor(&ERTS_P_MONITORS(rp), ref);
- if (rp != c_p)
- erts_smp_proc_unlock(rp, ERTS_PROC_LOCK_LINK);
- if (rmon != NULL)
- erts_destroy_monitor(rmon);
- }
- else {
- ERTS_SMP_ASSERT_IS_NOT_EXITING(c_p);
- }
-
+ if (deref_de) {
+ deref_de = 0;
+ erts_deref_dist_entry(dep);
+ }
+ dep = NULL;
+ demonitor_local_process(c_p, ref, to, &res);
}
break;
- default:
- res = ERTS_DEMONITOR_BADARG;
+ default /* case */ :
+badarg:
+ res = am_badarg; /* will be converted to error by caller */
*multip = am_false;
break;
}
- done:
+done:
if (unlock_link)
erts_smp_proc_unlock(c_p, ERTS_PROC_LOCK_LINK);
@@ -506,21 +549,20 @@ static int demonitor(Process *c_p, Eterm ref, Eterm *multip)
}
ERTS_SMP_LC_ASSERT(ERTS_PROC_LOCK_MAIN == erts_proc_lc_my_proc_locks(c_p));
- return res;
+ BIF_RET(res);
}
BIF_RETTYPE demonitor_1(BIF_ALIST_1)
{
Eterm multi;
switch (demonitor(BIF_P, BIF_ARG_1, &multi)) {
- case ERTS_DEMONITOR_FALSE:
- case ERTS_DEMONITOR_TRUE:
- BIF_RET(am_true);
- case ERTS_DEMONITOR_YIELD_TRUE:
- ERTS_BIF_YIELD_RETURN(BIF_P, am_true);
- case ERTS_DEMONITOR_BADARG:
- BIF_ERROR(BIF_P, BADARG);
- case ERTS_DEMONITOR_INTERNAL_ERROR:
+ case am_false:
+ case am_true: BIF_RET(am_true);
+ case THE_NON_VALUE: BIF_RET(THE_NON_VALUE);
+ case am_yield: ERTS_BIF_YIELD_RETURN(BIF_P, am_true);
+ case am_badarg: BIF_ERROR(BIF_P, BADARG);
+
+ case am_internal_error:
default:
ASSERT(! "demonitor(): internal error");
BIF_ERROR(BIF_P, EXC_INTERNAL_ERROR);
@@ -529,11 +571,11 @@ BIF_RETTYPE demonitor_1(BIF_ALIST_1)
BIF_RETTYPE demonitor_2(BIF_ALIST_2)
{
- Eterm res = am_true;
- Eterm multi = am_false;
- int info = 0;
- int flush = 0;
- Eterm list = BIF_ARG_2;
+ BIF_RETTYPE res = am_true;
+ Eterm multi = am_false;
+ int info = 0;
+ int flush = 0;
+ Eterm list = BIF_ARG_2;
while (is_list(list)) {
Eterm* consp = list_val(list);
@@ -554,24 +596,27 @@ BIF_RETTYPE demonitor_2(BIF_ALIST_2)
goto badarg;
switch (demonitor(BIF_P, BIF_ARG_1, &multi)) {
- case ERTS_DEMONITOR_FALSE:
+ case THE_NON_VALUE:
+ /* If other error occured or trap has been set up - pass through */
+ BIF_RET(THE_NON_VALUE);
+ case am_false:
if (info)
res = am_false;
if (flush) {
- flush_messages:
+flush_messages:
BIF_TRAP3(flush_monitor_messages_trap, BIF_P,
BIF_ARG_1, multi, res);
}
- case ERTS_DEMONITOR_TRUE:
+ case am_true:
if (multi == am_true && flush)
goto flush_messages;
BIF_RET(res);
- case ERTS_DEMONITOR_YIELD_TRUE:
+ case am_yield:
ERTS_BIF_YIELD_RETURN(BIF_P, am_true);
- case ERTS_DEMONITOR_BADARG:
- badarg:
+ case am_badarg:
+badarg:
BIF_ERROR(BIF_P, BADARG);
- case ERTS_DEMONITOR_INTERNAL_ERROR:
+ case am_internal_error:
default:
ASSERT(! "demonitor(): internal error");
BIF_ERROR(BIF_P, EXC_INTERNAL_ERROR);
@@ -615,14 +660,13 @@ erts_queue_monitor_message(Process *p,
erts_queue_message(p, *p_locksp, msgp, tup, am_system);
}
-static BIF_RETTYPE
+static Eterm
local_pid_monitor(Process *p, Eterm target, Eterm mon_ref, int boolean)
{
- BIF_RETTYPE ret;
- Process *rp;
+ Eterm ret = mon_ref;
+ Process *rp;
ErtsProcLocks p_locks = ERTS_PROC_LOCK_MAIN|ERTS_PROC_LOCK_LINK;
- ERTS_BIF_PREP_RET(ret, mon_ref);
if (target == p->common.id) {
return ret;
}
@@ -658,40 +702,112 @@ local_pid_monitor(Process *p, Eterm target, Eterm mon_ref, int boolean)
}
static BIF_RETTYPE
-local_name_monitor(Process *p, Eterm target_name)
+local_port_monitor(Process *origin, Eterm target)
{
- BIF_RETTYPE ret;
- Eterm mon_ref;
- ErtsProcLocks p_locks = ERTS_PROC_LOCK_MAIN|ERTS_PROC_LOCK_LINK;
- Process *rp;
+ BIF_RETTYPE ref = erts_make_ref(origin);
+ Port *port = erts_sig_lookup_port(origin, target);
+ ErtsProcLocks p_locks = ERTS_PROC_LOCK_MAIN;
- mon_ref = erts_make_ref(p);
- ERTS_BIF_PREP_RET(ret, mon_ref);
- erts_smp_proc_lock(p, ERTS_PROC_LOCK_LINK);
- rp = erts_whereis_process(p, p_locks, target_name, ERTS_PROC_LOCK_LINK,
- ERTS_P2P_FLG_ALLOW_OTHER_X);
- if (!rp) {
- DeclareTmpHeap(lhp,3,p);
+ if (!port) {
+res_no_proc:
+ /* Send the DOWN message immediately. Ref is made on the fly because
+ * caller has never seen it yet. */
+ erts_queue_monitor_message(origin, &p_locks, ref,
+ am_port, target, am_noproc);
+ }
+ else {
+ switch (erts_port_monitor(origin, port, target, &ref)) {
+ case ERTS_PORT_OP_DROPPED:
+ case ERTS_PORT_OP_BADARG:
+ goto res_no_proc;
+ case ERTS_PORT_OP_SCHEDULED:
+ BIF_TRAP3(await_port_send_result_trap, origin, ref,
+ am_busy_port, ref);
+ /* the busy_port atom will never be returned, because it cannot be
+ * returned from erts_port_monitor, but just in case if in future
+ * internal API changes - you may see this atom */
+ default:
+ break;
+ }
+ }
+ erts_smp_proc_unlock(origin, p_locks & ~ERTS_PROC_LOCK_MAIN);
+ BIF_RET(ref);
+}
+
+/* Type = process | port :: atom(), 1st argument passed to erlang:monitor/2
+ */
+static BIF_RETTYPE
+local_name_monitor(Process *self, Eterm type, Eterm target_name)
+{
+ BIF_RETTYPE ret = erts_make_ref(self);
+
+ ErtsProcLocks p_locks = ERTS_PROC_LOCK_MAIN | ERTS_PROC_LOCK_LINK;
+ Process *proc = NULL;
+ Port *port = NULL;
+
+ erts_smp_proc_lock(self, ERTS_PROC_LOCK_LINK);
+
+ erts_whereis_name(self, p_locks, target_name,
+ &proc, ERTS_PROC_LOCK_LINK,
+ ERTS_P2P_FLG_ALLOW_OTHER_X,
+ &port, 0);
+
+ /* If the name is not registered,
+ * or if we asked for proc and got a port,
+ * or if we asked for port and got a proc,
+ * we just send the 'DOWN' message.
+ */
+ if ((!proc && !port) ||
+ (type == am_process && port) ||
+ (type == am_port && proc)) {
+ DeclareTmpHeap(lhp,3,self);
Eterm item;
- UseTmpHeap(3,p);
- erts_smp_proc_unlock(p, ERTS_PROC_LOCK_LINK);
+ UseTmpHeap(3,self);
+
+ erts_smp_proc_unlock(self, ERTS_PROC_LOCK_LINK);
p_locks &= ~ERTS_PROC_LOCK_LINK;
+
item = TUPLE2(lhp, target_name, erts_this_dist_entry->sysname);
- erts_queue_monitor_message(p, &p_locks,
- mon_ref, am_process, item, am_noproc);
- UnUseTmpHeap(3,p);
- }
- else if (rp != p) {
- erts_add_monitor(&ERTS_P_MONITORS(p), MON_ORIGIN, mon_ref, rp->common.id,
- target_name);
- erts_add_monitor(&ERTS_P_MONITORS(rp), MON_TARGET, mon_ref, p->common.id,
- target_name);
- erts_smp_proc_unlock(rp, ERTS_PROC_LOCK_LINK);
+ erts_queue_monitor_message(self, &p_locks,
+ ret,
+ type, /* = process|port :: atom() */
+ item, am_noproc);
+ UnUseTmpHeap(3,self);
+ }
+ else if (port) {
+ erts_smp_proc_unlock(self, p_locks & ~ERTS_PROC_LOCK_MAIN);
+ p_locks &= ~ERTS_PROC_LOCK_MAIN;
+
+ switch (erts_port_monitor(self, port, target_name, &ret)) {
+ case ERTS_PORT_OP_DONE:
+ return ret;
+ case ERTS_PORT_OP_SCHEDULED: { /* Scheduled a signal */
+ ASSERT(is_internal_ref(ret));
+ BIF_TRAP3(await_port_send_result_trap, self,
+ ret, am_true, ret);
+ /* bif_trap returns */
+ } break;
+ default:
+ goto badarg;
+ }
+ }
+ else if (proc != self) {
+ erts_add_monitor(&ERTS_P_MONITORS(self), MON_ORIGIN, ret,
+ proc->common.id, target_name);
+ erts_add_monitor(&ERTS_P_MONITORS(proc), MON_TARGET, ret,
+ self->common.id, target_name);
+ erts_smp_proc_unlock(proc, ERTS_PROC_LOCK_LINK);
}
- erts_smp_proc_unlock(p, p_locks & ~ERTS_PROC_LOCK_MAIN);
-
- return ret;
+ if (p_locks) {
+ erts_smp_proc_unlock(self, p_locks & ~ERTS_PROC_LOCK_MAIN);
+ }
+ BIF_RET(ret);
+badarg:
+ if (p_locks) {
+ erts_smp_proc_unlock(self, p_locks & ~ERTS_PROC_LOCK_MAIN);
+ }
+ BIF_ERROR(self, BADARG);
}
static BIF_RETTYPE
@@ -758,7 +874,7 @@ remote_monitor(Process *p, Eterm bifarg1, Eterm bifarg2,
break;
}
- return ret;
+ BIF_RET(ret);
}
BIF_RETTYPE monitor_2(BIF_ALIST_2)
@@ -772,8 +888,9 @@ BIF_RETTYPE monitor_2(BIF_ALIST_2)
switch (BIF_ARG_1) {
case am_time_offset: {
Eterm ref;
- if (BIF_ARG_2 != am_clock_service)
- goto error;
+ if (BIF_ARG_2 != am_clock_service) {
+ goto badarg;
+ }
ref = erts_make_ref(BIF_P);
erts_smp_proc_lock(BIF_P, ERTS_PROC_LOCK_LINK);
erts_add_monitor(&ERTS_P_MONITORS(BIF_P), MON_TIME_OFFSET,
@@ -783,46 +900,57 @@ BIF_RETTYPE monitor_2(BIF_ALIST_2)
BIF_RET(ref);
}
case am_process:
+ case am_port:
break;
default:
- goto error;
+ goto badarg;
}
- if (is_internal_pid(target)) {
- local_pid:
- ret = local_pid_monitor(BIF_P, target, erts_make_ref(BIF_P), 0);
- } else if (is_external_pid(target)) {
+ if (is_internal_pid(target) && BIF_ARG_1 == am_process) {
+local_pid:
+ ret = local_pid_monitor(BIF_P, target, erts_make_ref(BIF_P), 0);
+ } else if (is_external_pid(target) && BIF_ARG_1 == am_process) {
dep = external_pid_dist_entry(target);
if (dep == erts_this_dist_entry)
goto local_pid;
ret = remote_monitor(BIF_P, BIF_ARG_1, BIF_ARG_2, dep, target, 0);
+ } else if (is_internal_port(target) && BIF_ARG_1 == am_port) {
+local_port:
+ ret = local_port_monitor(BIF_P, target);
+ } else if (is_external_port(target) && BIF_ARG_1 == am_port) {
+ dep = external_port_dist_entry(target);
+ if (dep == erts_this_dist_entry) {
+ goto local_port;
+ }
+ goto badarg; /* No want remote port */
} else if (is_atom(target)) {
- ret = local_name_monitor(BIF_P, target);
+ ret = local_name_monitor(BIF_P, BIF_ARG_1, target);
} else if (is_tuple(target)) {
Eterm *tp = tuple_val(target);
Eterm remote_node;
Eterm name;
- if (arityval(*tp) != 2)
- goto error;
+ if (arityval(*tp) != 2) {
+ goto badarg;
+ }
remote_node = tp[2];
name = tp[1];
if (!is_atom(remote_node) || !is_atom(name)) {
- goto error;
+ goto badarg;
}
if (!erts_is_alive && remote_node != am_Noname) {
- goto error; /* Remote monitor from (this) undistributed node */
+ goto badarg; /* Remote monitor from (this) undistributed node */
}
dep = erts_sysname_to_connected_dist_entry(remote_node);
if (dep == erts_this_dist_entry) {
deref_de = 1;
- ret = local_name_monitor(BIF_P, name);
+ ret = local_name_monitor(BIF_P, BIF_ARG_1, name);
} else {
if (dep)
deref_de = 1;
ret = remote_monitor(BIF_P, BIF_ARG_1, BIF_ARG_2, dep, name, 1);
}
} else {
- error:
+badarg:
ERTS_BIF_PREP_ERROR(ret, BIF_P, BADARG);
}
if (deref_de) {
diff --git a/erts/emulator/beam/erl_bif_info.c b/erts/emulator/beam/erl_bif_info.c
index b410578d37..3fb866733c 100644
--- a/erts/emulator/beam/erl_bif_info.c
+++ b/erts/emulator/beam/erl_bif_info.c
@@ -361,8 +361,13 @@ erts_print_system_version(int to, void *arg, Process *c_p)
}
typedef struct {
+ /* {Entity,Node} = {monitor.Name,monitor.Pid} for external by name
+ * {Entity,Node} = {monitor.Pid,NIL} for external/external by pid
+ * {Entity,Node} = {monitor.Name,erlang:node()} for internal by name */
Eterm entity;
Eterm node;
+ /* pid is actual target being monitored, no matter pid/port or name */
+ Eterm pid;
} MonitorInfo;
typedef struct {
@@ -420,21 +425,27 @@ static void collect_one_origin_monitor(ErtsMonitor *mon, void *vmicp)
EXTEND_MONITOR_INFOS(micp);
if (is_atom(mon->pid)) { /* external by name */
micp->mi[micp->mi_i].entity = mon->name;
- micp->mi[micp->mi_i].node = mon->pid;
- micp->sz += 3; /* need one 2-tuple */
+ micp->mi[micp->mi_i].node = mon->pid;
+ micp->sz += 3; /* need one 2-tuple */
} else if (is_external_pid(mon->pid)) { /* external by pid */
micp->mi[micp->mi_i].entity = mon->pid;
- micp->mi[micp->mi_i].node = NIL;
- micp->sz += NC_HEAP_SIZE(mon->pid);
+ micp->mi[micp->mi_i].node = NIL;
+ micp->sz += NC_HEAP_SIZE(mon->pid);
} else if (!is_nil(mon->name)) { /* internal by name */
micp->mi[micp->mi_i].entity = mon->name;
- micp->mi[micp->mi_i].node = erts_this_dist_entry->sysname;
- micp->sz += 3; /* need one 2-tuple */
+ micp->mi[micp->mi_i].node = erts_this_dist_entry->sysname;
+ micp->sz += 3; /* need one 2-tuple */
} else { /* internal by pid */
micp->mi[micp->mi_i].entity = mon->pid;
- micp->mi[micp->mi_i].node = NIL;
+ micp->mi[micp->mi_i].node = NIL;
/* no additional heap space needed */
}
+
+ /* have always pid at hand, to assist with figuring out if its a port or
+ * a process, when we monitored by name and process_info is requested.
+ * See: erl_bif_info.c:process_info_aux section for am_monitors */
+ micp->mi[micp->mi_i].pid = mon->pid;
+
micp->mi_i++;
micp->sz += 2 + 3; /* For a cons cell and a 2-tuple */
}
@@ -1190,37 +1201,49 @@ process_info_aux(Process *BIF_P,
case am_monitors: {
MonitorInfoCollection mic;
- int i;
+ int i;
INIT_MONITOR_INFOS(mic);
- erts_doforall_monitors(ERTS_P_MONITORS(rp),&collect_one_origin_monitor,&mic);
- hp = HAlloc(BIF_P, 3 + mic.sz);
+ erts_doforall_monitors(ERTS_P_MONITORS(rp),
+ &collect_one_origin_monitor, &mic);
+ hp = HAlloc(BIF_P, 3 + mic.sz);
res = NIL;
for (i = 0; i < mic.mi_i; i++) {
if (is_atom(mic.mi[i].entity)) {
/* Monitor by name.
- * Build {process, {Name, Node}} and cons it.
+ * Build {process|port, {Name, Node}} and cons it.
*/
Eterm t1, t2;
+ /* If pid is an atom, then it is a remote named monitor, which
+ has to be a process */
+ Eterm m_type = is_port(mic.mi[i].pid) ? am_port : am_process;
+ ASSERT(is_pid(mic.mi[i].pid)
+ || is_port(mic.mi[i].pid)
+ || is_atom(mic.mi[i].pid));
t1 = TUPLE2(hp, mic.mi[i].entity, mic.mi[i].node);
hp += 3;
- t2 = TUPLE2(hp, am_process, t1);
+ t2 = TUPLE2(hp, m_type, t1);
hp += 3;
res = CONS(hp, t2, res);
- hp += 2;
+ hp += 2;
}
else {
- /* Monitor by pid. Build {process, Pid} and cons it. */
+ /* Monitor by pid. Build {process|port, Pid} and cons it. */
Eterm t;
Eterm pid = STORE_NC(&hp, &MSO(BIF_P), mic.mi[i].entity);
- t = TUPLE2(hp, am_process, pid);
+
+ Eterm m_type = is_port(mic.mi[i].pid) ? am_port : am_process;
+ ASSERT(is_pid(mic.mi[i].pid)
+ || is_port(mic.mi[i].pid));
+
+ t = TUPLE2(hp, m_type, pid);
hp += 3;
res = CONS(hp, t, res);
- hp += 2;
+ hp += 2;
}
}
- DESTROY_MONITOR_INFOS(mic);
+ DESTROY_MONITOR_INFOS(mic);
break;
}
@@ -2880,7 +2903,8 @@ BIF_RETTYPE system_info_1(BIF_ALIST_1)
*/
Eterm
-erts_bld_port_info(Eterm **hpp, ErlOffHeap *ohp, Uint *szp, Port *prt, Eterm item)
+erts_bld_port_info(Eterm **hpp, ErlOffHeap *ohp, Uint *szp, Port *prt,
+ Eterm item)
{
Eterm res = THE_NON_VALUE;
@@ -2928,8 +2952,8 @@ erts_bld_port_info(Eterm **hpp, ErlOffHeap *ohp, Uint *szp, Port *prt, Eterm ite
Eterm item;
INIT_MONITOR_INFOS(mic);
-
- erts_doforall_monitors(ERTS_P_MONITORS(prt), &collect_one_origin_monitor, &mic);
+ erts_doforall_monitors(ERTS_P_MONITORS(prt),
+ &collect_one_origin_monitor, &mic);
if (szp)
*szp += mic.sz;
@@ -2938,14 +2962,16 @@ erts_bld_port_info(Eterm **hpp, ErlOffHeap *ohp, Uint *szp, Port *prt, Eterm ite
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);
+ Eterm m_type;
+
+ item = STORE_NC(hpp, ohp, mic.mi[i].entity);
+ m_type = is_port(item) ? am_port : am_process;
+ t = TUPLE2(*hpp, m_type, item);
*hpp += 3;
res = CONS(*hpp, t, res);
*hpp += 2;
}
- }
-
+ } // hpp
DESTROY_MONITOR_INFOS(mic);
if (szp) {
@@ -2953,6 +2979,32 @@ erts_bld_port_info(Eterm **hpp, ErlOffHeap *ohp, Uint *szp, Port *prt, Eterm ite
goto done;
}
}
+ else if (item == am_monitored_by) {
+ MonitorInfoCollection mic;
+ int i;
+ Eterm item;
+
+ INIT_MONITOR_INFOS(mic);
+ erts_doforall_monitors(ERTS_P_MONITORS(prt),
+ &collect_one_target_monitor, &mic);
+ 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;
+ }
+ } // hpp
+ DESTROY_MONITOR_INFOS(mic);
+
+ if (szp) {
+ res = am_true;
+ goto done;
+ }
+ }
else if (item == am_name) {
int count = sys_strlen(prt->name);
diff --git a/erts/emulator/beam/erl_bif_port.c b/erts/emulator/beam/erl_bif_port.c
index fefa9d8391..90e78a9b0b 100644
--- a/erts/emulator/beam/erl_bif_port.c
+++ b/erts/emulator/beam/erl_bif_port.c
@@ -139,6 +139,12 @@ sig_lookup_port(Process *c_p, Eterm id_or_name)
return lookup_port(c_p, id_or_name, ERTS_PORT_SFLGS_INVALID_DRIVER_LOOKUP);
}
+/* Non-inline copy of sig_lookup_port to be exported */
+Port *erts_sig_lookup_port(Process *c_p, Eterm id_or_name)
+{
+ return lookup_port(c_p, id_or_name, ERTS_PORT_SFLGS_INVALID_DRIVER_LOOKUP);
+}
+
static ERTS_INLINE Port *
data_lookup_port(Process *c_p, Eterm id_or_name)
{
diff --git a/erts/emulator/beam/erl_port.h b/erts/emulator/beam/erl_port.h
index f0075ca2b9..f90844ccc8 100644
--- a/erts/emulator/beam/erl_port.h
+++ b/erts/emulator/beam/erl_port.h
@@ -361,6 +361,8 @@ Eterm erts_request_io_bytes(Process *c_p);
#define ERTS_PORT_REDS_CONNECT (CONTEXT_REDS/200)
#define ERTS_PORT_REDS_UNLINK (CONTEXT_REDS/200)
#define ERTS_PORT_REDS_LINK (CONTEXT_REDS/200)
+#define ERTS_PORT_REDS_MONITOR (CONTEXT_REDS/200)
+#define ERTS_PORT_REDS_DEMONITOR (CONTEXT_REDS/200)
#define ERTS_PORT_REDS_BADSIG (CONTEXT_REDS/200)
#define ERTS_PORT_REDS_CONTROL (CONTEXT_REDS/100)
#define ERTS_PORT_REDS_CALL (CONTEXT_REDS/50)
@@ -850,16 +852,20 @@ void erts_port_resume_procs(Port *);
struct binary;
-#define ERTS_P2P_SIG_TYPE_BAD 0
-#define ERTS_P2P_SIG_TYPE_OUTPUT 1
-#define ERTS_P2P_SIG_TYPE_OUTPUTV 2
-#define ERTS_P2P_SIG_TYPE_CONNECT 3
-#define ERTS_P2P_SIG_TYPE_EXIT 4
-#define ERTS_P2P_SIG_TYPE_CONTROL 5
-#define ERTS_P2P_SIG_TYPE_CALL 6
-#define ERTS_P2P_SIG_TYPE_INFO 7
-#define ERTS_P2P_SIG_TYPE_LINK 8
-#define ERTS_P2P_SIG_TYPE_UNLINK 9
+enum {
+ ERTS_P2P_SIG_TYPE_BAD = 0,
+ ERTS_P2P_SIG_TYPE_OUTPUT = 1,
+ ERTS_P2P_SIG_TYPE_OUTPUTV = 2,
+ ERTS_P2P_SIG_TYPE_CONNECT = 3,
+ ERTS_P2P_SIG_TYPE_EXIT = 4,
+ ERTS_P2P_SIG_TYPE_CONTROL = 5,
+ ERTS_P2P_SIG_TYPE_CALL = 6,
+ ERTS_P2P_SIG_TYPE_INFO = 7,
+ ERTS_P2P_SIG_TYPE_LINK = 8,
+ ERTS_P2P_SIG_TYPE_UNLINK = 9,
+ ERTS_P2P_SIG_TYPE_MONITOR = 10,
+ ERTS_P2P_SIG_TYPE_DEMONITOR = 11
+};
#define ERTS_P2P_SIG_TYPE_BITS 4
#define ERTS_P2P_SIG_TYPE_MASK \
@@ -921,6 +927,15 @@ struct ErtsProc2PortSigData_ {
struct {
Eterm from;
} unlink;
+ struct {
+ Eterm origin; /* who receives monitor event, pid */
+ Eterm name; /* either name for named monitor, or port id */
+ } monitor;
+ struct {
+ Eterm origin; /* who is at the other end of the monitor, pid */
+ Eterm name; /* port id */
+ Uint32 ref[ERTS_MAX_REF_NUMBERS]; /* box contents of a ref */
+ } demonitor;
} u;
} ;
@@ -1017,6 +1032,29 @@ 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 *);
+/* Creates monitor between Origin and Target. Ref must be initialized to
+ * a reference (ref may be rewritten to be used to serve additionally as a
+ * signal id). Name is atom if user monitors port by name or NIL */
+ErtsPortOpResult erts_port_monitor(Process *origin, Port *target, Eterm name,
+ Eterm *ref);
+
+typedef enum {
+ /* Normal demonitor rules apply with locking and reductions bump */
+ ERTS_PORT_DEMONITOR_NORMAL = 1,
+ /* Relaxed demonitor rules when process is about to die, which means that
+ * pid lookup won't work, locks won't work, no reductions bump. */
+ ERTS_PORT_DEMONITOR_ORIGIN_ON_DEATHBED = 2,
+} ErtsDemonitorMode;
+
+/* Removes monitor between origin and target, identified by ref.
+ * origin_is_dying can be 0 (false, normal locking rules and reductions bump
+ * apply) or 1 (true, in case when we avoid origin locking) */
+ErtsPortOpResult erts_port_demonitor(Process *origin, ErtsDemonitorMode mode,
+ Port *target, Eterm ref,
+ Eterm *trap_ref);
+/* defined in erl_bif_port.c */
+Port *erts_sig_lookup_port(Process *c_p, Eterm id_or_name);
+
int erts_port_output_async(Port *, Eterm, Eterm);
/*
diff --git a/erts/emulator/beam/erl_process.c b/erts/emulator/beam/erl_process.c
index 5193be85b4..48f89d2bd7 100644
--- a/erts/emulator/beam/erl_process.c
+++ b/erts/emulator/beam/erl_process.c
@@ -12239,7 +12239,6 @@ static void doit_exit_monitor(ErtsMonitor *mon, void *vpcontext)
ExitMonitorContext *pcontext = vpcontext;
DistEntry *dep;
ErtsMonitor *rmon;
- Process *rp;
switch (mon->type) {
case MON_ORIGIN:
@@ -12268,9 +12267,10 @@ static void doit_exit_monitor(ErtsMonitor *mon, void *vpcontext)
erts_deref_dist_entry(dep);
}
} else {
- ASSERT(is_pid(mon->pid));
- if (is_internal_pid(mon->pid)) { /* local by pid or name */
- rp = erts_pid2proc(NULL, 0, mon->pid, ERTS_PROC_LOCK_LINK);
+ ASSERT(is_pid(mon->pid) || is_port(mon->pid));
+ /* if is local by pid or name */
+ if (is_internal_pid(mon->pid)) {
+ Process *rp = erts_pid2proc(NULL, 0, mon->pid, ERTS_PROC_LOCK_LINK);
if (!rp) {
goto done;
}
@@ -12280,7 +12280,17 @@ static void doit_exit_monitor(ErtsMonitor *mon, void *vpcontext)
goto done;
}
erts_destroy_monitor(rmon);
- } else { /* remote by pid */
+ } else if (is_internal_port(mon->pid)) {
+ /* Is a local port */
+ Port *prt = erts_port_lookup_raw(mon->pid);
+ if (!prt) {
+ goto done;
+ }
+ erts_port_demonitor(pcontext->p,
+ ERTS_PORT_DEMONITOR_ORIGIN_ON_DEATHBED,
+ prt, mon->ref, NULL);
+ return; /* let erts_port_demonitor do the deletion */
+ } else { /* remote by pid */
ASSERT(is_external_pid(mon->pid));
dep = external_pid_dist_entry(mon->pid);
ASSERT(dep != NULL);
@@ -12318,6 +12328,7 @@ static void doit_exit_monitor(ErtsMonitor *mon, void *vpcontext)
erts_port_release(prt);
} else if (is_internal_pid(mon->pid)) {/* local by name or pid */
Eterm watched;
+ Process *rp;
DeclareTmpHeapNoproc(lhp,3);
ErtsProcLocks rp_locks = (ERTS_PROC_LOCK_LINK
| ERTS_PROC_LOCKS_MSG_SEND);
diff --git a/erts/emulator/beam/io.c b/erts/emulator/beam/io.c
index 01df5476db..cb8792dffa 100644
--- a/erts/emulator/beam/io.c
+++ b/erts/emulator/beam/io.c
@@ -1260,7 +1260,7 @@ typedef struct {
/*
* Try doing an immediate driver callback call from a process. If
* this fail, the operation should be scheduled in the normal case...
- *
+ * Returns: ok to do the call, or error (lock busy, does not exist, etc)
*/
static ERTS_INLINE ErtsTryImmDrvCallResult
try_imm_drv_call(ErtsTryImmDrvCallState *sp)
@@ -3074,6 +3074,250 @@ erts_port_link(Process *c_p, Port *prt, Eterm to, Eterm *refp)
}
static void
+port_monitor_failure(Eterm port_id, Eterm origin, Eterm ref_DOWN)
+{
+ Process *origin_p;
+ ErtsProcLocks p_locks = ERTS_PROC_LOCK_LINK;
+ ASSERT(is_internal_pid(origin));
+
+ origin_p = erts_pid2proc(NULL, 0, origin, p_locks);
+ if (! origin_p) { return; }
+
+ /* Send the DOWN message immediately. Ref is made on the fly because
+ * caller has never seen it yet. */
+ erts_queue_monitor_message(origin_p, &p_locks, ref_DOWN,
+ am_port, port_id, am_noproc);
+ erts_smp_proc_unlock(origin_p, p_locks);
+}
+
+/* Origin wants to monitor port Prt. State contains possible error, which has
+ * happened just before. Name is either NIL or an atom, if user monitors
+ * a port by name. Ref is premade reference that will be returned to user */
+static void
+port_monitor(Port *prt, erts_aint32_t state, Eterm origin,
+ Eterm name, Eterm ref)
+{
+ Eterm name_or_nil = is_atom(name) ? name : NIL;
+
+ ASSERT(is_pid(origin));
+ ASSERT(is_atom(name) || is_port(name) || name == NIL);
+ ASSERT(is_internal_ref(ref));
+
+ if (!(state & ERTS_PORT_SFLGS_INVALID_LOOKUP)) {
+ ErtsProcLocks p_locks = ERTS_PROC_LOCK_LINK;
+
+ Process *origin_p = erts_pid2proc(NULL, 0, origin, p_locks);
+ if (! origin_p) {
+ goto failure;
+ }
+ erts_add_monitor(&ERTS_P_MONITORS(origin_p), MON_ORIGIN, ref,
+ prt->common.id, name_or_nil);
+ erts_add_monitor(&ERTS_P_MONITORS(prt), MON_TARGET, ref,
+ origin, name_or_nil);
+
+ erts_smp_proc_unlock(origin_p, p_locks);
+ } else {
+failure:
+ port_monitor_failure(prt->common.id, origin, ref);
+ }
+}
+
+static int
+port_sig_monitor(Port *prt, erts_aint32_t state, int op,
+ ErtsProc2PortSigData *sigdp)
+{
+ Eterm hp[REF_THING_SIZE];
+ Eterm ref = make_internal_ref(&hp);
+ write_ref_thing(hp, sigdp->ref[0], sigdp->ref[1], sigdp->ref[2]);
+
+ if (op == ERTS_PROC2PORT_SIG_EXEC) {
+ /* erts_add_monitor call inside port_monitor will copy ref from hp */
+ port_monitor(prt, state,
+ sigdp->u.monitor.origin,
+ sigdp->u.monitor.name,
+ ref);
+ } else {
+ port_monitor_failure(sigdp->u.monitor.name,
+ sigdp->u.monitor.origin,
+ ref);
+ }
+ if (sigdp->flags & ERTS_P2P_SIG_DATA_FLG_REPLY) {
+ port_sched_op_reply(sigdp->caller, sigdp->ref, am_true, prt);
+ }
+ return ERTS_PORT_REDS_MONITOR;
+}
+
+/* Creates monitor between Origin and Target. Ref must be initialized to
+ * a reference (ref may be rewritten to be used to serve additionally as a
+ * signal id). Name is atom if user monitors port by name or NIL */
+ErtsPortOpResult
+erts_port_monitor(Process *origin, Port *port, Eterm name, Eterm *refp)
+{
+ ErtsProc2PortSigData *sigdp;
+ ErtsTryImmDrvCallState try_call_state
+ = ERTS_INIT_TRY_IMM_DRV_CALL_STATE(
+ origin, port, ERTS_PORT_SFLGS_INVALID_LOOKUP,
+ 0,
+ 0, /* trap_ref is always set so !trap_ref always is false */
+ am_monitor);
+
+ ASSERT(origin);
+ ASSERT(port);
+ ASSERT(is_atom(name) || is_port(name));
+ ASSERT(refp);
+
+ switch (try_imm_drv_call(&try_call_state)) {
+ case ERTS_TRY_IMM_DRV_CALL_OK:
+ port_monitor(port, try_call_state.state, origin->common.id, name, *refp);
+ finalize_imm_drv_call(&try_call_state);
+ BUMP_REDS(origin, ERTS_PORT_REDS_MONITOR);
+ return ERTS_PORT_OP_DONE;
+ case ERTS_TRY_IMM_DRV_CALL_INVALID_PORT:
+ return ERTS_PORT_OP_BADARG;
+ default:
+ break; /* Schedule call instead... */
+ }
+
+ sigdp = erts_port_task_alloc_p2p_sig_data();
+ sigdp->flags = ERTS_P2P_SIG_TYPE_MONITOR;
+ sigdp->u.monitor.origin = origin->common.id;
+ sigdp->u.monitor.name = name; /* either named monitor, or port id */
+
+ /* Ref contents will be initialized here */
+ return erts_schedule_proc2port_signal(origin, port, origin->common.id,
+ refp, sigdp, 0, NULL,
+ port_sig_monitor);
+}
+
+static void
+port_demonitor_failure(Eterm port_id, Eterm origin, Eterm ref)
+{
+ Process *origin_p;
+ ErtsProcLocks rp_locks = ERTS_PROC_LOCK_LINK;
+ ErtsMonitor *mon1;
+ ASSERT(is_internal_pid(origin));
+
+ origin_p = erts_pid2proc(NULL, 0, origin, rp_locks);
+ if (! origin_p) { return; }
+
+ /* do not send any DOWN messages, drop monitors on process */
+ mon1 = erts_remove_monitor(&ERTS_P_MONITORS(origin_p), ref);
+ if (mon1 != NULL) {
+ erts_destroy_monitor(mon1);
+ }
+
+ erts_smp_proc_unlock(origin_p, rp_locks);
+}
+
+/* Origin wants to demonitor port Prt. State contains possible error, which has
+ * happened just before. Ref is reference to monitor */
+static void
+port_demonitor(Port *port, erts_aint32_t state, Eterm origin, Eterm ref)
+{
+ ASSERT(port);
+ ASSERT(is_pid(origin));
+ ASSERT(is_internal_ref(ref));
+
+ if (!(state & ERTS_PORT_SFLGS_INVALID_LOOKUP)) {
+ ErtsProcLocks p_locks = ERTS_PROC_LOCK_LINK;
+ Process *origin_p = erts_pid2proc(NULL, 0, origin, p_locks);
+ if (origin_p) {
+ ErtsMonitor *mon1 = erts_remove_monitor(&ERTS_P_MONITORS(origin_p),
+ ref);
+ if (mon1 != NULL) {
+ erts_destroy_monitor(mon1);
+ }
+ }
+ if (1) {
+ ErtsMonitor *mon2 = erts_remove_monitor(&ERTS_P_MONITORS(port),
+ ref);
+ if (mon2 != NULL) {
+ erts_destroy_monitor(mon2);
+ }
+ }
+ if (origin_p) { /* when origin is dying, it won't be found */
+ erts_smp_proc_unlock(origin_p, p_locks);
+ }
+ } else {
+ port_demonitor_failure(port->common.id, origin, ref);
+ }
+}
+
+static int
+port_sig_demonitor(Port *prt, erts_aint32_t state, int op,
+ ErtsProc2PortSigData *sigdp)
+{
+ Eterm hp[REF_THING_SIZE];
+ Eterm ref = make_internal_ref(&hp);
+ write_ref_thing(hp, sigdp->u.demonitor.ref[0],
+ sigdp->u.demonitor.ref[1],
+ sigdp->u.demonitor.ref[2]);
+ if (op == ERTS_PROC2PORT_SIG_EXEC) {
+ port_demonitor(prt, state, sigdp->u.demonitor.origin, ref);
+ } else {
+ port_demonitor_failure(sigdp->u.demonitor.name,
+ sigdp->u.demonitor.origin,
+ ref);
+ }
+ if (sigdp->flags & ERTS_P2P_SIG_DATA_FLG_REPLY) {
+ port_sched_op_reply(sigdp->caller, sigdp->ref, am_true, prt);
+ }
+ return ERTS_PORT_REDS_DEMONITOR;
+}
+
+/* Removes monitor between origin and target, identified by ref.
+ * Mode defines normal or relaxed demonitor rules (process is at death) */
+ErtsPortOpResult erts_port_demonitor(Process *origin, ErtsDemonitorMode mode,
+ Port *target, Eterm ref,
+ Eterm *trap_ref)
+{
+ Process *c_p = mode == ERTS_PORT_DEMONITOR_NORMAL ? origin : NULL;
+ ErtsProc2PortSigData *sigdp;
+ ErtsTryImmDrvCallState try_call_state
+ = ERTS_INIT_TRY_IMM_DRV_CALL_STATE(
+ c_p,
+ target, ERTS_PORT_SFLGS_INVALID_LOOKUP,
+ 0,
+ !trap_ref,
+ am_demonitor);
+
+ ASSERT(origin);
+ ASSERT(target);
+ ASSERT(is_internal_ref(ref));
+
+ switch (try_imm_drv_call(&try_call_state)) {
+ case ERTS_TRY_IMM_DRV_CALL_OK:
+ port_demonitor(target, try_call_state.state, origin->common.id, ref);
+ finalize_imm_drv_call(&try_call_state);
+ if (mode == ERTS_PORT_DEMONITOR_NORMAL) {
+ BUMP_REDS(origin, ERTS_PORT_REDS_DEMONITOR);
+ }
+ return ERTS_PORT_OP_DONE;
+ case ERTS_TRY_IMM_DRV_CALL_INVALID_PORT:
+ return ERTS_PORT_OP_BADARG;
+ default:
+ break; /* Schedule call instead... */
+ }
+
+ sigdp = erts_port_task_alloc_p2p_sig_data();
+ sigdp->flags = ERTS_P2P_SIG_TYPE_DEMONITOR;
+ sigdp->u.demonitor.origin = origin->common.id;
+ sigdp->u.demonitor.name = target->common.id;
+ {
+ RefThing *reft = ref_thing_ptr(ref);
+ /* Start from 1 skip ref arity */
+ sys_memcpy(sigdp->u.demonitor.ref,
+ internal_thing_ref_numbers(reft),
+ sizeof(sigdp->u.demonitor.ref));
+ }
+
+ /* Ref contents will be initialized here */
+ return erts_schedule_proc2port_signal(c_p, target, origin->common.id,
+ trap_ref, sigdp, 0, NULL,
+ port_sig_demonitor);
+}
+
+static void
init_ack_send_reply(Port *port, Eterm resp)
{
@@ -3942,23 +4186,30 @@ erts_terminate_port(Port *pp)
terminate_port(pp);
}
+static void port_fire_one_monitor(ErtsMonitor *mon, void *ctx0);
static void sweep_one_monitor(ErtsMonitor *mon, void *vpsc)
{
- ErtsMonitor *rmon;
- Process *rp;
+ switch (mon->type) {
+ case MON_ORIGIN: {
+ ErtsMonitor *rmon;
+ Process *rp;
- ASSERT(mon->type == MON_ORIGIN);
- ASSERT(is_internal_pid(mon->pid));
- rp = erts_pid2proc(NULL, 0, mon->pid, ERTS_PROC_LOCK_LINK);
- if (!rp) {
- goto done;
- }
- rmon = erts_remove_monitor(&ERTS_P_MONITORS(rp), mon->ref);
- erts_smp_proc_unlock(rp, ERTS_PROC_LOCK_LINK);
- if (rmon == NULL) {
- goto done;
+ ASSERT(is_internal_pid(mon->pid));
+ rp = erts_pid2proc(NULL, 0, mon->pid, ERTS_PROC_LOCK_LINK);
+ if (!rp) {
+ goto done;
+ }
+ rmon = erts_remove_monitor(&ERTS_P_MONITORS(rp), mon->ref);
+ erts_smp_proc_unlock(rp, ERTS_PROC_LOCK_LINK);
+ if (rmon == NULL) {
+ goto done;
+ }
+ erts_destroy_monitor(rmon);
+ } break;
+ case MON_TARGET: {
+ port_fire_one_monitor(mon, vpsc); /* forward call */
+ } break;
}
- erts_destroy_monitor(rmon);
done:
erts_destroy_monitor(mon);
}
@@ -4039,6 +4290,43 @@ static void sweep_one_link(ErtsLink *lnk, void *vpsc)
erts_destroy_link(lnk);
}
+static void
+port_fire_one_monitor(ErtsMonitor *mon, void *ctx0)
+{
+ Process *origin;
+ ErtsProcLocks origin_locks;
+
+ if (mon->type != MON_TARGET || ! is_pid(mon->pid)) {
+ return;
+ }
+ /*
+ * Proceed here if someone monitors us, we (port) are the target and
+ * origin is some process
+ */
+ origin_locks = ERTS_PROC_LOCKS_MSG_SEND | ERTS_PROC_LOCK_LINK;
+
+ origin = erts_pid2proc(NULL, 0, mon->pid, origin_locks);
+ if (origin) {
+ DeclareTmpHeapNoproc(lhp,3);
+ SweepContext *ctx = (SweepContext *)ctx0;
+ ErtsMonitor *rmon;
+ Eterm watched = (is_atom(mon->name)
+ ? TUPLE2(lhp, mon->name, erts_this_dist_entry->sysname)
+ : ctx->port->common.id);
+
+ erts_queue_monitor_message(origin, &origin_locks, mon->ref, am_port,
+ watched, ctx->reason);
+ UnUseTmpHeapNoproc(3);
+
+ rmon = erts_remove_monitor(&ERTS_P_MONITORS(origin), mon->ref);
+ erts_smp_proc_unlock(origin, origin_locks);
+
+ if (rmon) {
+ erts_destroy_monitor(rmon);
+ }
+ }
+}
+
/* '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.
@@ -4050,39 +4338,40 @@ static void sweep_one_link(ErtsLink *lnk, void *vpsc)
*/
int
-erts_deliver_port_exit(Port *p, Eterm from, Eterm reason, int send_closed,
+erts_deliver_port_exit(Port *prt, Eterm from, Eterm reason, int send_closed,
int drop_normal)
{
ErtsLink *lnk;
- Eterm rreason;
+ Eterm modified_reason;
erts_aint32_t state, set_state_flags;
ERTS_SMP_CHK_NO_PROC_LOCKS;
- ERTS_SMP_LC_ASSERT(erts_lc_is_port_locked(p));
+ ERTS_SMP_LC_ASSERT(erts_lc_is_port_locked(prt));
- rreason = (reason == am_kill) ? am_killed : reason;
+ modified_reason = (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);
+ DTRACE_CHARBUF(reason_str, 64);
erts_snprintf(from_str, sizeof(DTRACE_CHARBUF_NAME(from_str)), "%T", from);
- dtrace_port_str(p, port_str);
- erts_snprintf(rreason_str, sizeof(DTRACE_CHARBUF_NAME(rreason_str)), "%T", rreason);
- DTRACE4(port_exit, from_str, port_str, p->name, rreason_str);
+ dtrace_port_str(prt, port_str);
+ erts_snprintf(reason_str, sizeof(DTRACE_CHARBUF_NAME(reason_str)), "%T",
+ modified_reason);
+ DTRACE4(port_exit, from_str, port_str, prt->name, reason_str);
}
#endif
- state = erts_atomic32_read_nob(&p->state);
+ state = erts_atomic32_read_nob(&prt->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 && drop_normal) {
+ if (reason == am_normal && from != ERTS_PORT_GET_CONNECTED(prt)
+ && from != prt->common.id && drop_normal) {
return 0;
}
@@ -4090,53 +4379,54 @@ erts_deliver_port_exit(Port *p, Eterm from, Eterm reason, int send_closed,
if (send_closed)
set_state_flags |= ERTS_PORT_SFLG_SEND_CLOSED;
- erts_port_task_sched_enter_exiting_state(&p->sched);
+ erts_port_task_sched_enter_exiting_state(&prt->sched);
- state = erts_atomic32_read_bor_mb(&p->state, set_state_flags);
+ state = erts_atomic32_read_bor_mb(&prt->state, set_state_flags);
state |= set_state_flags;
- if (IS_TRACED_FL(p, F_TRACE_PORTS))
- trace_port(p, am_closed, reason);
+ if (IS_TRACED_FL(prt, F_TRACE_PORTS))
+ trace_port(prt, am_closed, reason);
- erts_trace_check_exiting(p->common.id);
+ erts_trace_check_exiting(prt->common.id);
- set_busy_port(ERTS_Port2ErlDrvPort(p), 0);
+ set_busy_port(ERTS_Port2ErlDrvPort(prt), 0);
- if (p->common.u.alive.reg != NULL)
- (void) erts_unregister_name(NULL, 0, p, p->common.u.alive.reg->name);
+ if (prt->common.u.alive.reg != NULL)
+ (void) erts_unregister_name(NULL, 0, prt, prt->common.u.alive.reg->name);
{
- SweepContext sc = {p, rreason};
- lnk = ERTS_P_LINKS(p);
- ERTS_P_LINKS(p) = NULL;
+ SweepContext sc = {prt, modified_reason};
+ lnk = ERTS_P_LINKS(prt);
+ ERTS_P_LINKS(prt) = NULL;
erts_sweep_links(lnk, &sweep_one_link, &sc);
}
- DRV_MONITOR_LOCK_PDL(p);
+ DRV_MONITOR_LOCK_PDL(prt);
{
- ErtsMonitor *moni = ERTS_P_MONITORS(p);
- ERTS_P_MONITORS(p) = NULL;
- erts_sweep_monitors(moni, &sweep_one_monitor, NULL);
+ SweepContext ctx = {prt, modified_reason};
+ ErtsMonitor *moni = ERTS_P_MONITORS(prt);
+ ERTS_P_MONITORS(prt) = NULL;
+ erts_sweep_monitors(moni, &sweep_one_monitor, &ctx);
}
- DRV_MONITOR_UNLOCK_PDL(p);
+ DRV_MONITOR_UNLOCK_PDL(prt);
- 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,
+ if ((state & ERTS_PORT_SFLG_DISTRIBUTION) && prt->dist_entry) {
+ erts_do_net_exits(prt->dist_entry, modified_reason);
+ erts_deref_dist_entry(prt->dist_entry);
+ prt->dist_entry = NULL;
+ erts_atomic32_read_band_relb(&prt->state,
~ERTS_PORT_SFLG_DISTRIBUTION);
}
- if ((reason != am_kill) && !is_port_ioq_empty(p)) {
+ if ((reason != am_kill) && !is_port_ioq_empty(prt)) {
/* must turn exiting flag off */
- erts_atomic32_read_bset_relb(&p->state,
+ erts_atomic32_read_bset_relb(&prt->state,
(ERTS_PORT_SFLG_EXITING
| ERTS_PORT_SFLG_CLOSING),
ERTS_PORT_SFLG_CLOSING);
- flush_port(p);
+ flush_port(prt);
}
else {
- terminate_port(p);
+ terminate_port(prt);
}
return 1;
diff --git a/erts/emulator/beam/register.c b/erts/emulator/beam/register.c
index 77f79fcea4..ac7096745e 100644
--- a/erts/emulator/beam/register.c
+++ b/erts/emulator/beam/register.c
@@ -323,7 +323,8 @@ erts_whereis_name(Process *c_p,
Process** proc,
ErtsProcLocks need_locks,
int flags,
- Port** port)
+ Port** port,
+ int lock_port)
{
RegProc* rp = NULL;
HashValue hval;
@@ -406,31 +407,33 @@ erts_whereis_name(Process *c_p,
*port = NULL;
else {
#ifdef ERTS_SMP
- if (pending_port == rp->pt)
- pending_port = NULL;
- else {
- if (pending_port) {
- /* Ahh! Registered port changed while reg lock
- was unlocked... */
- erts_port_release(pending_port);
- pending_port = NULL;
- }
+ if (lock_port) {
+ if (pending_port == rp->pt)
+ pending_port = NULL;
+ else {
+ if (pending_port) {
+ /* Ahh! Registered port changed while reg lock
+ was unlocked... */
+ erts_port_release(pending_port);
+ pending_port = NULL;
+ }
- if (erts_smp_port_trylock(rp->pt) == EBUSY) {
- Eterm id = rp->pt->common.id; /* id read only... */
- /* Unlock all locks, acquire port lock, and restart... */
- if (current_c_p_locks) {
- erts_smp_proc_unlock(c_p, current_c_p_locks);
- current_c_p_locks = 0;
- }
- reg_read_unlock();
- pending_port = erts_id2port(id);
- goto restart;
- }
- }
+ if (erts_smp_port_trylock(rp->pt) == EBUSY) {
+ Eterm id = rp->pt->common.id; /* id read only... */
+ /* Unlock all locks, acquire port lock, and restart... */
+ if (current_c_p_locks) {
+ erts_smp_proc_unlock(c_p, current_c_p_locks);
+ current_c_p_locks = 0;
+ }
+ reg_read_unlock();
+ pending_port = erts_id2port(id);
+ goto restart;
+ }
+ }
+ ERTS_SMP_LC_ASSERT(erts_lc_is_port_locked(rp->pt));
+ }
#endif
*port = rp->pt;
- ERTS_SMP_LC_ASSERT(erts_lc_is_port_locked(*port));
}
}
@@ -452,7 +455,7 @@ erts_whereis_process(Process *c_p,
int flags)
{
Process *proc;
- erts_whereis_name(c_p, c_p_locks, name, &proc, need_locks, flags, NULL);
+ erts_whereis_name(c_p, c_p_locks, name, &proc, need_locks, flags, NULL, 0);
return proc;
}
diff --git a/erts/emulator/beam/register.h b/erts/emulator/beam/register.h
index 88ab7b7bf1..d839f55d6b 100644
--- a/erts/emulator/beam/register.h
+++ b/erts/emulator/beam/register.h
@@ -49,7 +49,7 @@ int erts_register_name(Process *, Eterm, Eterm);
Eterm erts_whereis_name_to_id(Process *, Eterm);
void erts_whereis_name(Process *, ErtsProcLocks,
Eterm, Process**, ErtsProcLocks, int,
- Port**);
+ Port**, int);
Process *erts_whereis_process(Process *,
ErtsProcLocks,
Eterm,
diff --git a/erts/emulator/test/monitor_SUITE.erl b/erts/emulator/test/monitor_SUITE.erl
index 8955e62df5..90d2bd8c5d 100644
--- a/erts/emulator/test/monitor_SUITE.erl
+++ b/erts/emulator/test/monitor_SUITE.erl
@@ -21,6 +21,7 @@
-module(monitor_SUITE).
-include_lib("common_test/include/ct.hrl").
+-include_lib("eunit/include/eunit.hrl").
-export([all/0, suite/0, groups/0,
case_1/1, case_1a/1, case_2/1, case_2a/1, mon_e_1/1, demon_e_1/1, demon_1/1,
@@ -706,7 +707,7 @@ named_down(Config) when is_list(Config) ->
spawn_opt(fun () ->
WFun = fun
(F, hej) -> F(F, hopp);
-(F, hopp) -> F(F, hej)
+ (F, hopp) -> F(F, hej)
end,
NoSchedulers = erlang:system_info(schedulers_online),
lists:foreach(fun (_) ->
@@ -726,13 +727,14 @@ named_down(Config) when is_list(Config) ->
NamedProc = spawn_link(fun () ->
receive after infinity -> ok end
end),
- true = register(Name, NamedProc),
+ ?assertEqual(true, register(Name, NamedProc)),
unlink(NamedProc),
exit(NamedProc, bang),
Mon = erlang:monitor(process, Name),
- receive {'DOWN',Mon, _, _, _} -> ok end,
- true = register(Name, self()),
- true = unregister(Name),
+ receive {'DOWN',Mon, _, _, bang} -> ok
+ after 3000 -> ?assert(false) end,
+ ?assertEqual(true, register(Name, self())),
+ ?assertEqual(true, unregister(Name)),
process_flag(priority,Prio),
ok.
diff --git a/erts/emulator/test/port_SUITE.erl b/erts/emulator/test/port_SUITE.erl
index 79abcbde5f..ee07699884 100644
--- a/erts/emulator/test/port_SUITE.erl
+++ b/erts/emulator/test/port_SUITE.erl
@@ -74,27 +74,68 @@
%%
--export([all/0, suite/0, groups/0,
- init_per_testcase/2, end_per_testcase/2,
- init_per_suite/1, end_per_suite/1,
- stream_small/1, stream_big/1,
- basic_ping/1, slow_writes/1, bad_packet/1, bad_port_messages/1,
- mul_basic/1, mul_slow_writes/1,
- dying_port/1, port_program_with_path/1,
- open_input_file_port/1, open_output_file_port/1,
- count_fds/1,
- iter_max_ports/1, eof/1, input_only/1, output_only/1,
- name1/1,
- t_binary/1, parallell/1, t_exit/1,
- env/1, huge_env/1, bad_env/1, cd/1, exit_status/1,
- bad_args/1,
- tps_16_bytes/1, tps_1K/1, line/1, stderr_to_stdout/1,
- otp_3906/1, otp_4389/1, win_massive/1, win_massive_client/1,
- 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,
- port_setget_data/1,
- unregister_name/1, parallelism_option/1]).
+-export([all/0, suite/0, groups/0, init_per_testcase/2, end_per_testcase/2,
+ init_per_suite/1, end_per_suite/1]).
+-export([
+ bad_args/1,
+ bad_env/1,
+ bad_packet/1,
+ bad_port_messages/1,
+ basic_ping/1,
+ cd/1,
+ close_deaf_port/1,
+ count_fds/1,
+ dying_port/1,
+ env/1,
+ eof/1,
+ exit_status/1,
+ exit_status_multi_scheduling_block/1,
+ huge_env/1,
+ input_only/1,
+ iter_max_ports/1,
+ line/1,
+ mix_up_ports/1,
+ mon_port_invalid_type/1,
+ mon_port_bad_named/1,
+ mon_port_bad_remote_on_local/1,
+ mon_port_local/1,
+ mon_port_name_demonitor/1,
+ mon_port_named/1,
+ mon_port_origin_dies/1,
+ mon_port_pid_demonitor/1,
+ mon_port_remote_on_remote/1,
+ mon_port_driver_die/1,
+ mon_port_driver_die_demonitor/1,
+ mul_basic/1,
+ mul_slow_writes/1,
+ name1/1,
+ open_input_file_port/1,
+ open_output_file_port/1,
+ otp_3906/1,
+ otp_4389/1,
+ otp_5112/1,
+ otp_5119/1,
+ otp_6224/1,
+ output_only/1,
+ parallelism_option/1,
+ parallell/1,
+ port_program_with_path/1,
+ port_setget_data/1,
+ ports/1,
+ slow_writes/1,
+ spawn_driver/1,
+ spawn_executable/1,
+ stderr_to_stdout/1,
+ stream_big/1,
+ stream_small/1,
+ t_binary/1,
+ t_exit/1,
+ tps_16_bytes/1,
+ tps_1K/1,
+ unregister_name/1,
+ win_massive/1,
+ win_massive_client/1
+]).
-export([do_iter_max_ports/2]).
@@ -105,12 +146,13 @@
-include_lib("common_test/include/ct.hrl").
-include_lib("kernel/include/file.hrl").
+-include_lib("eunit/include/eunit.hrl").
suite() ->
[{ct_hooks,[ts_install_cth]},
{timetrap, {seconds, 10}}].
-all() ->
+all() ->
[otp_6224, {group, stream}, basic_ping, slow_writes,
bad_packet, bad_port_messages, {group, options},
{group, multiple_packets}, parallell, dying_port,
@@ -123,14 +165,32 @@ all() ->
exit_status_multi_scheduling_block, ports, spawn_driver,
spawn_executable, close_deaf_port, unregister_name,
port_setget_data,
- parallelism_option].
-
-groups() ->
+ parallelism_option,
+ mon_port_invalid_type,
+ mon_port_local,
+ mon_port_remote_on_remote,
+ mon_port_bad_remote_on_local,
+ mon_port_origin_dies,
+ mon_port_named,
+ mon_port_bad_named,
+ mon_port_pid_demonitor,
+ mon_port_name_demonitor,
+ mon_port_driver_die,
+ mon_port_driver_die_demonitor
+ ].
+
+groups() ->
[{stream, [], [stream_small, stream_big]},
{options, [], [t_binary, eof, input_only, output_only]},
{multiple_packets, [], [mul_basic, mul_slow_writes]},
{tps, [], [tps_16_bytes, tps_1K]}].
+init_per_testcase(Case, Config) when Case =:= mon_port_driver_die;
+ Case =:= mon_port_driver_die_demonitor ->
+ case erlang:system_info(schedulers_online) of
+ 1 -> {skip, "Need 2 schedulers to run testcase"};
+ _ -> Config
+ end;
init_per_testcase(Case, Config) ->
[{testcase, Case} |Config].
@@ -160,7 +220,7 @@ do_win_massive() ->
ct:timetrap({minutes, 6}),
SuiteDir = filename:dirname(code:which(?MODULE)),
Ports = " +Q 8192",
- {ok, Node} =
+ {ok, Node} =
test_server:start_node(win_massive,
slave,
[{args, " -pa " ++ SuiteDir ++ Ports}]),
@@ -169,7 +229,7 @@ do_win_massive() ->
ok.
win_massive_client(N) ->
- {ok,P}=gen_tcp:listen(?WIN_MASSIVE_PORT,[{reuseaddr,true}]),
+ {ok,P}=gen_tcp:listen(?WIN_MASSIVE_PORT,[{reuseaddr,true}]),
L = win_massive_loop(P,N),
Len = length(L),
lists:foreach(fun(E) ->
@@ -278,7 +338,7 @@ bad_port_messages(Config) when is_list(Config) ->
bad_message(PortTest, {self(),{connect,no_pid}}),
ok.
-bad_message(PortTest, Message) ->
+bad_message(PortTest, Message) ->
P = open_port({spawn,PortTest}, []),
P ! Message,
receive
@@ -773,7 +833,7 @@ line(Config) when is_list(Config) ->
S1 = lists:flatten(io_lib:format("-l~w", [length(L1)])),
io:format("S1 = ~w, L1 = ~w~n", [S1,L1]),
port_expect(Config,[{L1,
- [{eol, Packet1}, {noeol, Packet2}, eof]}], 0,
+ [{eol, Packet1}, {noeol, Packet2}, eof]}], 0,
S1, [{line,Siz},eof]),
%% Test that lonely <CR> Don't get treated as newlines
port_expect(Config,[{lists:append([Packet1, [13], Packet2,
@@ -844,9 +904,9 @@ env(Config) when is_list(Config) ->
{"glurf","a glorfy string"}]),
%% A lot of non existing variables (mingled with existing)
- NotExistingList = [{lists:flatten(io_lib:format("V~p_not_existing",[X])),false}
+ NotExistingList = [{lists:flatten(io_lib:format("V~p_not_existing",[X])),false}
|| X <- lists:seq(1,150)],
- ExistingList = [{lists:flatten(io_lib:format("V~p_existing",[X])),"a_value"}
+ ExistingList = [{lists:flatten(io_lib:format("V~p_existing",[X])),"a_value"}
|| X <- lists:seq(1,150)],
env_slave(Temp, lists:sort(ExistingList ++ NotExistingList)),
ok.
@@ -1320,22 +1380,22 @@ spawn_driver(Config) when is_list(Config) ->
ok = load_driver(Path, "echo_drv"),
Port = erlang:open_port({spawn_driver, "echo_drv"}, []),
Port ! {self(), {command, "Hello port!"}},
- receive
- {Port, {data, "Hello port!"}} = Msg1 ->
+ receive
+ {Port, {data, "Hello port!"}} = Msg1 ->
io:format("~p~n", [Msg1]),
- ok;
+ ok;
Other ->
ct:fail({unexpected, Other})
end,
Port ! {self(), close},
receive {Port, closed} -> ok end,
- Port2 = erlang:open_port({spawn_driver, "echo_drv -Hello port?"},
+ Port2 = erlang:open_port({spawn_driver, "echo_drv -Hello port?"},
[]),
- receive
- {Port2, {data, "Hello port?"}} = Msg2 ->
+ receive
+ {Port2, {data, "Hello port?"}} = Msg2 ->
io:format("~p~n", [Msg2]),
- ok;
+ ok;
Other2 ->
ct:fail({unexpected2, Other2})
end,
@@ -1354,23 +1414,23 @@ parallelism_option(Config) when is_list(Config) ->
[{parallelism, true}]),
{parallelism, true} = erlang:port_info(Port, parallelism),
Port ! {self(), {command, "Hello port!"}},
- receive
- {Port, {data, "Hello port!"}} = Msg1 ->
+ receive
+ {Port, {data, "Hello port!"}} = Msg1 ->
io:format("~p~n", [Msg1]),
- ok;
+ ok;
Other ->
ct:fail({unexpected, Other})
end,
Port ! {self(), close},
receive {Port, closed} -> ok end,
- Port2 = erlang:open_port({spawn_driver, "echo_drv -Hello port?"},
+ Port2 = erlang:open_port({spawn_driver, "echo_drv -Hello port?"},
[{parallelism, false}]),
{parallelism, false} = erlang:port_info(Port2, parallelism),
- receive
- {Port2, {data, "Hello port?"}} = Msg2 ->
+ receive
+ {Port2, {data, "Hello port?"}} = Msg2 ->
io:format("~p~n", [Msg2]),
- ok;
+ ok;
Other2 ->
ct:fail({unexpected2, Other2})
end,
@@ -1389,20 +1449,20 @@ spawn_executable(Config) when is_list(Config) ->
["echo_args"] = run_echo_args(DataDir,[binary, "echo_args"]),
["echo_arguments"] = run_echo_args(DataDir,["echo_arguments"]),
["echo_arguments"] = run_echo_args(DataDir,[binary, "echo_arguments"]),
- [ExactFile1,"hello world","dlrow olleh"] =
+ [ExactFile1,"hello world","dlrow olleh"] =
run_echo_args(DataDir,[ExactFile1,"hello world","dlrow olleh"]),
[ExactFile1] = run_echo_args(DataDir,[default]),
[ExactFile1] = run_echo_args(DataDir,[binary, default]),
- [ExactFile1,"hello world","dlrow olleh"] =
+ [ExactFile1,"hello world","dlrow olleh"] =
run_echo_args(DataDir,[switch_order,ExactFile1,"hello world",
"dlrow olleh"]),
- [ExactFile1,"hello world","dlrow olleh"] =
+ [ExactFile1,"hello world","dlrow olleh"] =
run_echo_args(DataDir,[binary,switch_order,ExactFile1,"hello world",
"dlrow olleh"]),
[ExactFile1,"hello world","dlrow olleh"] =
run_echo_args(DataDir,[default,"hello world","dlrow olleh"]),
- [ExactFile1,"hello world","dlrow olleh"] =
+ [ExactFile1,"hello world","dlrow olleh"] =
run_echo_args_2("\""++ExactFile1++"\" "++"\"hello world\" \"dlrow olleh\""),
[ExactFile1,"hello world","dlrow olleh"] =
run_echo_args_2(unicode:characters_to_binary("\""++ExactFile1++"\" "++"\"hello world\" \"dlrow olleh\"")),
@@ -1418,7 +1478,7 @@ spawn_executable(Config) when is_list(Config) ->
[ExactFile2] = run_echo_args(SpaceDir,[]),
["echo_args"] = run_echo_args(SpaceDir,["echo_args"]),
["echo_arguments"] = run_echo_args(SpaceDir,["echo_arguments"]),
- [ExactFile2,"hello world","dlrow olleh"] =
+ [ExactFile2,"hello world","dlrow olleh"] =
run_echo_args(SpaceDir,[ExactFile2,"hello world","dlrow olleh"]),
[ExactFile2,"hello world","dlrow olleh"] =
run_echo_args(SpaceDir,[binary, ExactFile2,"hello world","dlrow olleh"]),
@@ -1429,16 +1489,16 @@ spawn_executable(Config) when is_list(Config) ->
run_echo_args(SpaceDir,[binary, ExactFile2,"hello \"world\"","\"dlrow\" olleh"]),
[ExactFile2] = run_echo_args(SpaceDir,[default]),
- [ExactFile2,"hello world","dlrow olleh"] =
+ [ExactFile2,"hello world","dlrow olleh"] =
run_echo_args(SpaceDir,[switch_order,ExactFile2,"hello world", "dlrow olleh"]),
- [ExactFile2,"hello world","dlrow olleh"] =
+ [ExactFile2,"hello world","dlrow olleh"] =
run_echo_args(SpaceDir,[default,"hello world","dlrow olleh"]),
- [ExactFile2,"hello world","dlrow olleh"] =
+ [ExactFile2,"hello world","dlrow olleh"] =
run_echo_args_2("\""++ExactFile2++"\" "++"\"hello world\" \"dlrow olleh\""),
[ExactFile2,"hello world","dlrow olleh"] =
run_echo_args_2(unicode:characters_to_binary("\""++ExactFile2++"\" "++"\"hello world\" \"dlrow olleh\"")),
- ExeExt =
+ ExeExt =
case string:to_lower(lists:last(string:tokens(ExactFile2,"."))) of
"exe" ->
".exe";
@@ -1452,17 +1512,17 @@ spawn_executable(Config) when is_list(Config) ->
[ExactFile3] = run_echo_args(SpaceDir,Executable2,[]),
["echo_args"] = run_echo_args(SpaceDir,Executable2,["echo_args"]),
["echo_arguments"] = run_echo_args(SpaceDir,Executable2,["echo_arguments"]),
- [ExactFile3,"hello world","dlrow olleh"] =
+ [ExactFile3,"hello world","dlrow olleh"] =
run_echo_args(SpaceDir,Executable2,[ExactFile3,"hello world","dlrow olleh"]),
[ExactFile3] = run_echo_args(SpaceDir,Executable2,[default]),
- [ExactFile3,"hello world","dlrow olleh"] =
+ [ExactFile3,"hello world","dlrow olleh"] =
run_echo_args(SpaceDir,Executable2,
[switch_order,ExactFile3,"hello world",
"dlrow olleh"]),
- [ExactFile3,"hello world","dlrow olleh"] =
+ [ExactFile3,"hello world","dlrow olleh"] =
run_echo_args(SpaceDir,Executable2,
[default,"hello world","dlrow olleh"]),
- [ExactFile3,"hello world","dlrow olleh"] =
+ [ExactFile3,"hello world","dlrow olleh"] =
run_echo_args_2("\""++ExactFile3++"\" "++"\"hello world\" \"dlrow olleh\""),
[ExactFile3,"hello world","dlrow olleh"] =
run_echo_args_2(unicode:characters_to_binary("\""++ExactFile3++"\" "++"\"hello world\" \"dlrow olleh\"")),
@@ -1510,11 +1570,11 @@ test_bat_file(Dir) ->
<<"\r\n">>],
file:write_file(Full,list_to_binary(D)),
EF = filename:basename(FN),
- [DN,"hello","world"] =
+ [DN,"hello","world"] =
run_echo_args(Dir,FN,
[default,"hello","world"]),
%% The arg0 argumant should be ignored when running batch files
- [DN,"hello","world"] =
+ [DN,"hello","world"] =
run_echo_args(Dir,FN,
["knaskurt","hello","world"]),
EF = filename:basename(DN),
@@ -1533,10 +1593,10 @@ test_sh_file(Dir) ->
<<"done\n">>],
file:write_file(Full,list_to_binary(D)),
chmodplusx(Full),
- [Full,"hello","world"] =
+ [Full,"hello","world"] =
run_echo_args(Dir,FN,
[default,"hello","world"]),
- [Full,"hello","world of spaces"] =
+ [Full,"hello","world of spaces"] =
run_echo_args(Dir,FN,
[default,"hello","world of spaces"]),
file:write_file(filename:join([Dir,"testfile1"]),<<"testdata1">>),
@@ -1544,7 +1604,7 @@ test_sh_file(Dir) ->
Pattern = filename:join([Dir,"testfile*"]),
L = filelib:wildcard(Pattern),
2 = length(L),
- [Full,"hello",Pattern] =
+ [Full,"hello",Pattern] =
run_echo_args(Dir,FN,
[default,"hello",Pattern]),
ok.
@@ -1620,10 +1680,10 @@ mix_up_ports(Config) when is_list(Config) ->
ok = load_driver(Path, "echo_drv"),
Port = erlang:open_port({spawn, "echo_drv"}, []),
Port ! {self(), {command, "Hello port!"}},
- receive
- {Port, {data, "Hello port!"}} = Msg1 ->
+ receive
+ {Port, {data, "Hello port!"}} = Msg1 ->
io:format("~p~n", [Msg1]),
- ok;
+ ok;
Other ->
ct:fail({unexpected, Other})
end,
@@ -1631,7 +1691,7 @@ mix_up_ports(Config) when is_list(Config) ->
receive {Port, closed} -> ok end,
loop(start, done,
fun(P) ->
- Q =
+ Q =
(catch erlang:open_port({spawn, "echo_drv"}, [])),
%% io:format("~p ", [Q]),
if is_port(Q) ->
@@ -1642,7 +1702,7 @@ mix_up_ports(Config) when is_list(Config) ->
end
end),
Port ! {self(), {command, "Hello again port!"}},
- receive
+ receive
Msg2 ->
ct:fail({unexpected, Msg2})
after 1000 ->
@@ -1802,7 +1862,7 @@ exit_status_msb_test(Config, SleepSecs) when is_list(Config) ->
%% We want to start port programs from as many schedulers as possible
%% and we want these port programs to terminate while multi-scheduling
%% is blocked.
- %%
+ %%
NoSchedsOnln = erlang:system_info(schedulers_online),
Parent = self(),
io:format("SleepSecs = ~p~n", [SleepSecs]),
@@ -2214,7 +2274,7 @@ ports_snapshots(0, _, _) ->
ok;
ports_snapshots(Iter, TrafficPid, OtherPorts) ->
- TrafficPid ! start,
+ TrafficPid ! start,
receive after 1 -> ok end,
Snapshot = erlang:ports(),
@@ -2243,7 +2303,7 @@ ports_traffic_stopped(MaxPorts, {PortList, PortCnt}) ->
end.
ports_traffic_started(MaxPorts, {PortList, PortCnt}, EventList) ->
- receive
+ receive
{Pid, stop} ->
%%io:format("Traffic stopped in ~p\n",[self()]),
Pid ! {self(), EventList, PortList},
@@ -2256,7 +2316,7 @@ ports_traffic_started(MaxPorts, {PortList, PortCnt}, EventList) ->
ports_traffic_do(MaxPorts, {PortList, PortCnt}, EventList) ->
N = uniform(MaxPorts),
case N > PortCnt of
- true -> % Open port
+ true -> % Open port
P = open_port({spawn, "exit_drv"}, []),
%%io:format("Created port ~p\n",[P]),
ports_traffic_started(MaxPorts, {[P|PortList], PortCnt+1},
@@ -2270,7 +2330,7 @@ ports_traffic_do(MaxPorts, {PortList, PortCnt}, EventList) ->
[{close,P}|EventList])
end.
-ports_verify(Ports, PortsAfter, EventList) ->
+ports_verify(Ports, PortsAfter, EventList) ->
%%io:format("Candidate=~p\nEvents=~p\n", [PortsAfter, EventList]),
case lists:sort(Ports) =:= lists:sort(PortsAfter) of
true ->
@@ -2280,10 +2340,10 @@ ports_verify(Ports, PortsAfter, EventList) ->
%% Note that we track the event list "backwards", undoing open/close:
case EventList of
[{open,P} | Tail] ->
- ports_verify(Ports, lists:delete(P,PortsAfter), Tail);
+ ports_verify(Ports, lists:delete(P,PortsAfter), Tail);
[{close,P} | Tail] ->
- ports_verify(Ports, [P | PortsAfter], Tail);
+ ports_verify(Ports, [P | PortsAfter], Tail);
[] ->
ct:fail("Inconsistent snapshot from erlang:ports()")
@@ -2391,3 +2451,227 @@ wait_until(Fun) ->
receive after 100 -> ok end,
wait_until(Fun)
end.
+
+%% Attempt to monitor pid as port, and port as pid
+mon_port_invalid_type(_Config) ->
+ Port = hd(erlang:ports()),
+ ?assertError(badarg, erlang:monitor(port, self())),
+ ?assertError(badarg, erlang:monitor(process, Port)),
+ ok.
+
+%% With local port
+mon_port_local(Config) ->
+ Port1 = create_port(Config, ["-h1", "-q"]), % will close after we send 1 byte
+ Ref1 = erlang:monitor(port, Port1),
+ ?assertMatch({proc_monitors, true, port_monitored_by, true},
+ port_is_monitored(self(), Port1)),
+ Port1 ! {self(), {command, <<"1">>}}, % port test will close self immediately
+ receive ExitP1 -> ?assertMatch({'DOWN', Ref1, port, Port1, _}, ExitP1)
+ after 1000 -> ?assert(false) end,
+ ?assertMatch({proc_monitors, false, port_monitored_by, false},
+ port_is_monitored(self(), Port1)),
+
+ %% Trying to re-monitor a port which exists but is not healthy will
+ %% succeed but then will immediately send DOWN
+ Ref2 = erlang:monitor(port, Port1),
+ receive ExitP2 -> ?assertMatch({'DOWN', Ref2, port, Port1, _}, ExitP2)
+ after 1000 -> ?assert(false) end,
+ ok.
+
+%% With remote port on remote node (should fail)
+mon_port_remote_on_remote(_Config) ->
+ Port3 = binary_to_term(<<131, 102, % Ext term format: PORT_EXT
+ 100, 0, 13, "fgsfds@fgsfds", % Node :: ATOM_EXT
+ 1:32/big, % Id
+ 0>>), % Creation
+ ?assertError(badarg, erlang:monitor(port, Port3)),
+ ok.
+
+%% Remote port belongs to this node and does not exist
+%% Port4 produces #Port<0.167772160> which should not exist in a test run
+mon_port_bad_remote_on_local(_Config) ->
+ Port4 = binary_to_term(<<131, 102, % Ext term format: PORT_EXT
+ 100, 0, 13, "nonode@nohost", % Node
+ 167772160:32/big, % Id
+ 0>>), % Creation
+ ?assertError(badarg, erlang:monitor(port, Port4)),
+ ok.
+
+%% Monitor owner (origin) dies before port is closed
+mon_port_origin_dies(Config) ->
+ Port5 = create_port(Config, ["-h1", "-q"]), % will close after we send 1 byte
+ Self5 = self(),
+ Proc5 = spawn(fun() ->
+ Self5 ! test5_started,
+ erlang:monitor(port, Port5),
+ receive stop -> ok end
+ end),
+ erlang:monitor(process, Proc5), % we want to sync with its death
+ receive test5_started -> ok
+ after 1000 -> ?assert(false) end,
+ ?assertMatch({proc_monitors, true, port_monitored_by, true},
+ port_is_monitored(Proc5, Port5)),
+ Proc5 ! stop,
+ % receive from monitor (removing race condition)
+ receive ExitP5 -> ?assertMatch({'DOWN', _, process, Proc5, _}, ExitP5)
+ after 1000 -> ?assert(false) end,
+ ?assertMatch({proc_monitors, false, port_monitored_by, false},
+ port_is_monitored(Proc5, Port5)),
+ Port5 ! {self(), {command, <<"1">>}}, % make port quit
+ ok.
+
+%% Monitor a named port
+mon_port_named(Config) ->
+ Name6 = test_port6,
+ Port6 = create_port(Config, ["-h1", "-q"]), % will close after we send 1 byte
+ erlang:register(Name6, Port6),
+ erlang:monitor(port, Name6),
+ ?assertMatch({proc_monitors, true, port_monitored_by, true},
+ port_is_monitored(self(), Name6)),
+ Port6 ! {self(), {command, <<"1">>}}, % port test will close self immediately
+ receive ExitP6 -> ?assertMatch({'DOWN', _, port, {Name6, _}, _}, ExitP6)
+ after 1000 -> ?assert(false) end,
+ ?assertMatch({proc_monitors, false, port_monitored_by, false},
+ port_is_monitored(self(), Name6)),
+ ok.
+
+%% Named does not exist: Should succeed but immediately send 'DOWN'
+mon_port_bad_named(_Config) ->
+ Name7 = test_port7,
+ erlang:monitor(port, Name7),
+ receive {'DOWN', _, port, {Name7, _}, noproc} -> ok
+ after 1000 -> ?assert(false) end,
+ ok.
+
+%% Monitor a pid and demonitor by ref
+mon_port_pid_demonitor(Config) ->
+ Port8 = create_port(Config, ["-h1", "-q"]), % will close after we send 1 byte
+ Ref8 = erlang:monitor(port, Port8),
+ ?assertMatch({proc_monitors, true, port_monitored_by, true},
+ port_is_monitored(self(), Port8)),
+ erlang:demonitor(Ref8),
+ ?assertMatch({proc_monitors, false, port_monitored_by, false},
+ port_is_monitored(self(), Port8)),
+ Port8 ! {self(), {command, <<"1">>}}, % port test will close self immediately
+ ok.
+
+%% Monitor by name and demonitor by ref
+mon_port_name_demonitor(Config) ->
+ Name9 = test_port9,
+ Port9 = create_port(Config, ["-h1", "-q"]), % will close after we send 1 byte
+ erlang:register(Name9, Port9),
+ Ref9 = erlang:monitor(port, Name9),
+ ?assertMatch({proc_monitors, true, port_monitored_by, true},
+ port_is_monitored(self(), Name9)),
+ erlang:demonitor(Ref9),
+ ?assertMatch({proc_monitors, false, port_monitored_by, false},
+ port_is_monitored(self(), Name9)),
+ Port9 ! {self(), {command, <<"1">>}}, % port test will close self immediately
+ ok.
+
+%% 1. Spawn a port which will sleep 3 seconds
+%% 2. Port driver and dies horribly (via C driver_failure call). This should
+%% mark port as exiting or something.
+%% 3. While the command happens, a monitor is requested on the port
+mon_port_driver_die(Config) ->
+ erlang:process_flag(scheduler, 1),
+
+ Path = proplists:get_value(data_dir, Config),
+ ok = load_driver(Path, "sleep_failure_drv"),
+ Port = open_port({spawn, "sleep_failure_drv"}, []),
+
+ Self = self(),
+ erlang:spawn_opt(fun() ->
+ timer:sleep(250),
+ Ref = erlang:monitor(port, Port),
+ %% Now check that msg actually arrives
+ receive
+ {'DOWN', Ref, _Port2, _, _} = M -> Self ! M
+ after 3000 -> Self ! no_down_message
+ end
+ end,[{scheduler, 2}]),
+ Port ! {self(), {command, "Fail, please!"}},
+ receive
+ A when is_atom(A) -> ?assertEqual(A, 'A_should_be_printed');
+ {'DOWN', _R, port, Port, noproc} -> ok;
+ {'DOWN', _R, _P, _, _} = M -> ct:fail({got_wrong_down,M})
+ after 5000 -> ?assert(false)
+ end,
+ ok.
+
+
+%% 1. Spawn a port which will sleep 3 seconds
+%% 2. Monitor port
+%% 3. Port driver and dies horribly (via C driver_failure call). This should
+%% mark port as exiting or something.
+%% 4. While the command happens, a demonitor is requested on the port
+mon_port_driver_die_demonitor(Config) ->
+ erlang:process_flag(scheduler, 1),
+
+ Path = proplists:get_value(data_dir, Config),
+ ok = load_driver(Path, "sleep_failure_drv"),
+ Port = open_port({spawn, "sleep_failure_drv"}, []),
+
+ Self = self(),
+ erlang:spawn_opt(
+ fun() ->
+ Ref = erlang:monitor(port, Port),
+ Self ! Ref,
+ timer:sleep(250),
+ erlang:demonitor(Ref),
+ %% Now check that msg still arrives,
+ %% the demon should have arrived after
+ %% the port exited
+ receive
+ {'DOWN', Ref, _Port2, _, _} = M -> Self ! M
+ after 3000 -> Self ! no_down_message
+ end
+ end,[{scheduler, 2}]),
+ Ref = receive R -> R end,
+ Port ! {self(), {command, "Fail, please!"}},
+ receive
+ {'DOWN', Ref, port, Port, normal} -> ok;
+ {'DOWN', _R, _P, _, _} = M -> ct:fail({got_wrong_down,M})
+ after 5000 -> ?assert(false)
+ end,
+ ok.
+
+%% @doc Makes a controllable port for testing. Underlying mechanism of this
+%% port is not important, only important is our ability to close/kill it or
+%% have it monitored.
+create_port(Config, Args) ->
+ DataDir = ?config(data_dir, Config),
+ %% Borrow port test utility from port SUITE
+ Program = filename:join([DataDir, "port_test"]),
+ erlang:open_port({spawn_executable, Program}, [{args, Args}]).
+
+%% @doc Checks if process Pid exists, and if so, if its monitoring (or not)
+%% the Port (or if port doesn't exist, we assume answer is no).
+port_is_monitored(Pid, Port) when is_pid(Pid), is_port(Port) ->
+ %% Variant for when port is a port id (port())
+ A = case erlang:process_info(Pid, monitors) of
+ undefined -> false;
+ {monitors, ProcMTargets} -> lists:member({port, Port}, ProcMTargets)
+ end,
+ B = case erlang:port_info(Port, monitored_by) of
+ undefined -> false;
+ {monitored_by, PortMonitors} -> lists:member(Pid, PortMonitors)
+ end,
+ {proc_monitors, A, port_monitored_by, B};
+port_is_monitored(Pid, PortName) when is_pid(Pid), is_atom(PortName) ->
+ %% Variant for when port is an atom
+ A = case erlang:process_info(Pid, monitors) of
+ undefined -> false;
+ {monitors, ProcMTargets} ->
+ lists:member({port, {PortName, node()}}, ProcMTargets)
+ end,
+ B = case erlang:whereis(PortName) of
+ undefined -> false; % name is not registered or is dead
+ PortId ->
+ case erlang:port_info(PortId, monitored_by) of
+ undefined -> false; % is dead
+ {monitored_by, PortMonitors} ->
+ lists:member(Pid, PortMonitors)
+ end
+ end,
+ {proc_monitors, A, port_monitored_by, B}.
diff --git a/erts/emulator/test/port_SUITE_data/Makefile.src b/erts/emulator/test/port_SUITE_data/Makefile.src
index ff822ae720..fb7685c4b6 100644
--- a/erts/emulator/test/port_SUITE_data/Makefile.src
+++ b/erts/emulator/test/port_SUITE_data/Makefile.src
@@ -4,7 +4,7 @@ CFLAGS = @CFLAGS@ -I@erl_include@ @DEFS@
CROSSLDFLAGS = @CROSSLDFLAGS@
PROGS = port_test@exe@ echo_args@exe@ dead_port@exe@
-DRIVERS = echo_drv@dll@ exit_drv@dll@ failure_drv@dll@
+DRIVERS = echo_drv@dll@ exit_drv@dll@ failure_drv@dll@ sleep_failure_drv@dll@
all: $(PROGS) $(DRIVERS) port_test.@EMULATOR@
diff --git a/erts/emulator/test/port_SUITE_data/sleep_failure_drv.c b/erts/emulator/test/port_SUITE_data/sleep_failure_drv.c
new file mode 100644
index 0000000000..1f52646572
--- /dev/null
+++ b/erts/emulator/test/port_SUITE_data/sleep_failure_drv.c
@@ -0,0 +1,76 @@
+#include <stdio.h>
+#include "erl_driver.h"
+#ifdef __WIN32__
+# include <windows.h>
+#else
+# include <unistd.h>
+#endif
+
+typedef struct _erl_drv_data FailureDrvData;
+
+static FailureDrvData *failure_drv_start(ErlDrvPort, char *);
+static void failure_drv_stop(FailureDrvData *);
+static void failure_drv_output(ErlDrvData, char *, ErlDrvSizeT);
+static void failure_drv_finish(void);
+
+static ErlDrvEntry failure_drv_entry = {
+ NULL, /* init */
+ failure_drv_start,
+ failure_drv_stop,
+ failure_drv_output,
+ NULL, /* ready_input */
+ NULL, /* ready_output */
+ "sleep_failure_drv",
+ NULL, /* finish */
+ NULL, /* handle */
+ NULL, /* control */
+ NULL, /* timeout */
+ NULL, /* outputv */
+ NULL, /* ready_async */
+ NULL,
+ NULL,
+ NULL,
+ ERL_DRV_EXTENDED_MARKER,
+ ERL_DRV_EXTENDED_MAJOR_VERSION,
+ ERL_DRV_EXTENDED_MINOR_VERSION,
+ 0,
+ NULL,
+ NULL,
+ NULL,
+};
+
+
+
+/* -------------------------------------------------------------------------
+** Entry functions
+**/
+
+DRIVER_INIT(failure_drv)
+{
+ return &failure_drv_entry;
+}
+
+static FailureDrvData *failure_drv_start(ErlDrvPort port, char *command) {
+ void *void_ptr;
+
+ return void_ptr = port;
+}
+
+static void failure_drv_stop(FailureDrvData *data_p) {
+}
+
+static void failure_drv_output(ErlDrvData drv_data, char *buf, ErlDrvSizeT len) {
+ FailureDrvData *data_p = (FailureDrvData *) drv_data;
+ void *void_ptr;
+ ErlDrvPort port = void_ptr = data_p;
+
+#ifdef __WIN32__
+ Sleep(3000);
+#else
+ sleep(3);
+#endif
+ driver_failure(port, 0);
+}
+
+static void failure_drv_finish() {
+}
diff --git a/erts/preloaded/src/erlang.erl b/erts/preloaded/src/erlang.erl
index 94f3078173..edf79b8f75 100644
--- a/erts/preloaded/src/erlang.erl
+++ b/erts/preloaded/src/erlang.erl
@@ -1206,16 +1206,18 @@ module_loaded(_Module) ->
erlang:nif_error(undefined).
-type registered_name() :: atom().
-
-type registered_process_identifier() :: registered_name() | {registered_name(), node()}.
-
-type monitor_process_identifier() :: pid() | registered_process_identifier().
+-type monitor_port_identifier() :: port() | registered_name().
%% monitor/2
--spec monitor(process, monitor_process_identifier()) -> MonitorRef when
- MonitorRef :: reference();
- (time_offset, clock_service) -> MonitorRef when
- MonitorRef :: reference().
+-spec monitor
+ (process, monitor_process_identifier()) -> MonitorRef
+ when MonitorRef :: reference();
+ (port, monitor_port_identifier()) -> MonitorRef
+ when MonitorRef :: reference();
+ (time_offset, clock_service) -> MonitorRef
+ when MonitorRef :: reference().
monitor(_Type, _Item) ->
erlang:nif_error(undefined).
@@ -2160,7 +2162,7 @@ process_flag(_Flag, _Value) ->
{max_heap_size, MaxHeapSize :: max_heap_size()} |
{monitored_by, Pids :: [pid()]} |
{monitors,
- Monitors :: [{process, Pid :: pid() |
+ Monitors :: [{process | port, Pid :: pid() | port() |
{RegName :: atom(), Node :: node()}}]} |
{message_queue_data, MQD :: message_queue_data()} |
{priority, Level :: priority_level()} |
@@ -3087,6 +3089,9 @@ port_info(Port) ->
(Port, monitors) -> {monitors, Monitors} | 'undefined' when
Port :: port() | atom(),
Monitors :: [{process, pid()}];
+ (Port, monitored_by) -> {monitored_by, MonitoredBy} | 'undefined' when
+ Port :: port() | atom(),
+ MonitoredBy :: [pid()];
(Port, name) -> {name, Name} | 'undefined' when
Port :: port() | atom(),
Name :: string();
generated by cgit v1.2.3 (git 2.25.1) at 2024-12-16 08:40:57 +0000