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-rw-r--r--erts/emulator/beam/erl_bif_info.c100
1 files changed, 76 insertions, 24 deletions
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);
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