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authorDan Gudmundsson <[email protected]>2018-03-27 15:08:32 +0200
committerDan Gudmundsson <[email protected]>2018-03-27 15:08:32 +0200
commit6e13704cf55ca1a13713ddd3ba68e19db44473c1 (patch)
tree7906ba505195f0f6df4578387c602d28637f3623 /lib/observer/src/observer_pro_wx.erl
parentacfd88f41fbea76650d270f0bb96b6e3975d1480 (diff)
parent6dab210081f194210fe55e29ca36c70929425784 (diff)
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Merge branch 'dgud/observer/fix-config-bug/OTP-14993'
* dgud/observer/fix-config-bug/OTP-14993: Fix crash when config was wrong
Diffstat (limited to 'lib/observer/src/observer_pro_wx.erl')
-rw-r--r--lib/observer/src/observer_pro_wx.erl33
1 files changed, 25 insertions, 8 deletions
diff --git a/lib/observer/src/observer_pro_wx.erl b/lib/observer/src/observer_pro_wx.erl
index 1c40afba46..e2372cde33 100644
--- a/lib/observer/src/observer_pro_wx.erl
+++ b/lib/observer/src/observer_pro_wx.erl
@@ -50,6 +50,7 @@
-define(ID_TRACE_NEW, 208).
-define(ID_TRACE_ALL, 209).
-define(ID_ACCUMULATE, 210).
+-define(ID_GARBAGE_COLLECT, 211).
-define(TRACE_PIDS_STR, "Trace selected process identifiers").
-define(TRACE_NAMES_STR, "Trace selected processes, "
@@ -147,11 +148,11 @@ create_list_box(Panel, Holder) ->
ListCtrl = wxListCtrl:new(Panel, [{style, Style},
{onGetItemText,
fun(_, Row, Col) ->
- call(Holder, {get_row, self(), Row, Col})
+ safe_call(Holder, {get_row, self(), Row, Col})
end},
{onGetItemAttr,
fun(_, Item) ->
- call(Holder, {get_attr, self(), Item})
+ safe_call(Holder, {get_attr, self(), Item})
end}
]),
Li = wxListItem:new(),
@@ -208,17 +209,26 @@ start_procinfo(Pid, Frame, Opened) ->
Opened
end.
+
+safe_call(Holder, What) ->
+ case call(Holder, What, 2000) of
+ Res when is_atom(Res) -> "";
+ Res -> Res
+ end.
+
call(Holder, What) ->
+ call(Holder, What, infinity).
+
+call(Holder, What, TMO) ->
Ref = erlang:monitor(process, Holder),
Holder ! What,
receive
- {'DOWN', Ref, _, _, _} -> "";
+ {'DOWN', Ref, _, _, _} -> holder_dead;
{Holder, Res} ->
erlang:demonitor(Ref),
Res
- after 2000 ->
- io:format("Hanging call ~tp~n",[What]),
- ""
+ after TMO ->
+ timeout
end.
%%%%%%%%%%%%%%%%%%%%%%% Callbacks %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
@@ -269,7 +279,10 @@ code_change(_, _, State) ->
handle_call(get_config, _, #state{holder=Holder, timer=Timer}=State) ->
Conf = observer_lib:timer_config(Timer),
- Accum = call(Holder, {get_accum, self()}),
+ Accum = case safe_call(Holder, {get_accum, self()}) of
+ Bool when is_boolean(Bool) -> Bool;
+ _ -> false
+ end,
{reply, Conf#{acc=>Accum}, State};
handle_call(Msg, _From, State) ->
@@ -316,6 +329,9 @@ handle_event(#wx{id=?ID_KILL}, #state{right_clicked_pid=Pid, sel=Sel0}=State) ->
Sel = rm_selected(Pid,Sel0),
{noreply, State#state{sel=Sel}};
+handle_event(#wx{id=?ID_GARBAGE_COLLECT}, #state{sel={_, Pids}}=State) ->
+ _ = [rpc:call(node(Pid), erlang, garbage_collect, [Pid]) || Pid <- Pids],
+ {noreply, State};
handle_event(#wx{id=?ID_PROC},
#state{panel=Panel, right_clicked_pid=Pid, procinfo_menu_pids=Opened}=State) ->
@@ -370,6 +386,7 @@ handle_event(#wx{event=#wxList{type=command_list_item_right_click,
wxMenu:append(Menu, ?ID_TRACE_NAMES,
"Trace selected processes by name (all nodes)",
[{help, ?TRACE_NAMES_STR}]),
+ wxMenu:append(Menu, ?ID_GARBAGE_COLLECT, "Garbage collect processes"),
wxMenu:append(Menu, ?ID_KILL, "Kill process " ++ pid_to_list(P)),
wxWindow:popupMenu(Panel, Menu),
wxMenu:destroy(Menu),
@@ -465,7 +482,7 @@ init_table_holder(Parent, Accum0, Attrs) ->
Backend = spawn_link(node(), observer_backend, procs_info, [self()]),
Accum = case Accum0 of
true -> true;
- false -> []
+ _ -> []
end,
table_holder(#holder{parent=Parent,
info=array:new(),