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authorBjörn Gustavsson <[email protected]>2017-06-13 07:10:39 +0200
committerBjörn Gustavsson <[email protected]>2017-06-13 12:21:48 +0200
commit0725fe8296204a61f3dbc57142bfd458a45dd547 (patch)
tree851226493801170f3d75dc5e40cdca02f30a89cf
parentc75bc0ef433caa42cebcd8e3c8dd7a5f0c4fd408 (diff)
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Add informational test case z_SUITE:leaked_processes/1
Add z_SUITE:leaked_processes/1 to print the process information for all new processes created during execution of the emulator test suite. Test cases are not supposed leak processes, because that could disturb later test cases.
-rw-r--r--erts/emulator/test/a_SUITE.erl48
-rw-r--r--erts/emulator/test/z_SUITE.erl33
2 files changed, 70 insertions, 11 deletions
diff --git a/erts/emulator/test/a_SUITE.erl b/erts/emulator/test/a_SUITE.erl
index 880c5a5821..07922f9942 100644
--- a/erts/emulator/test/a_SUITE.erl
+++ b/erts/emulator/test/a_SUITE.erl
@@ -29,25 +29,55 @@
-include_lib("common_test/include/ct.hrl").
--export([all/0, suite/0,
- long_timers/1, pollset_size/1]).
+-export([all/0, suite/0, init_per_suite/1, end_per_suite/1,
+ leaked_processes/1, long_timers/1, pollset_size/1]).
suite() ->
[{ct_hooks,[ts_install_cth]}].
-all() ->
- [long_timers, pollset_size].
+all() ->
+ [leaked_processes, long_timers, pollset_size].
+
+%% Start some system servers now to avoid having them
+%% reported as leaks.
+
+init_per_suite(Config) when is_list(Config) ->
+ %% Ensure inet_gethost_native port program started, in order to
+ %% allow other suites to use it...
+ inet_gethost_native:gethostbyname("localhost"),
+
+ %% Start the timer server.
+ timer:start(),
+
+ Config.
+
+end_per_suite(Config) when is_list(Config) ->
+ Config.
+
+leaked_processes(Config) when is_list(Config) ->
+ Parent = self(),
+ Go = make_ref(),
+ spawn(fun () ->
+ Name = leaked_processes__process_holder,
+ true = register(Name, self()),
+ Ps = processes(),
+ Parent ! Go,
+ receive
+ {get_initial_processes, Pid} ->
+ Pid ! {initial_processes, Ps}
+ end
+ end),
+ receive Go -> ok end,
+ {comment, "Testcase started! This test will run in parallel with the "
+ "erts testsuite and ends in the z_SUITE:leaked_processes/1 testcase."}.
long_timers(Config) when is_list(Config) ->
Dir = proplists:get_value(data_dir, Config),
long_timers_test:start(Dir),
{comment, "Testcase started! This test will run in parallel with the "
- "erts testsuite and ends in the z_SUITE:long_timers testcase."}.
+ "erts testsuite and ends in the z_SUITE:long_timers/1 testcase."}.
pollset_size(Config) when is_list(Config) ->
- %% Ensure inet_gethost_native port program started, in order to
- %% allow other suites to use it...
- inet_gethost_native:gethostbyname("localhost"),
Parent = self(),
Go = make_ref(),
spawn(fun () ->
@@ -63,7 +93,7 @@ pollset_size(Config) when is_list(Config) ->
end),
receive Go -> ok end,
{comment, "Testcase started! This test will run in parallel with the "
- "erts testsuite and ends in the z_SUITE:pollset_size testcase."}.
+ "erts testsuite and ends in the z_SUITE:pollset_size/1 testcase."}.
%%
%% Internal functions...
diff --git a/erts/emulator/test/z_SUITE.erl b/erts/emulator/test/z_SUITE.erl
index a2b267543f..feea7432a9 100644
--- a/erts/emulator/test/z_SUITE.erl
+++ b/erts/emulator/test/z_SUITE.erl
@@ -36,7 +36,8 @@
-export([schedulers_alive/1, node_container_refc_check/1,
long_timers/1, pollset_size/1,
- check_io_debug/1, get_check_io_info/0]).
+ check_io_debug/1, get_check_io_info/0,
+ leaked_processes/1]).
suite() ->
[{ct_hooks,[ts_install_cth]},
@@ -44,7 +45,10 @@ suite() ->
all() ->
[schedulers_alive, node_container_refc_check,
- long_timers, pollset_size, check_io_debug].
+ long_timers, pollset_size, check_io_debug,
+ %% Make sure that the leaked_processes/1 is always
+ %% run last.
+ leaked_processes].
%%%
%%% The test cases -------------------------------------------------------------
@@ -285,6 +289,31 @@ has_gethost([P|T]) ->
has_gethost([]) ->
false.
+leaked_processes(Config) when is_list(Config) ->
+ %% Replace the defualt timetrap with a timetrap with
+ %% known pid.
+ test_server:timetrap_cancel(),
+ Dog = test_server:timetrap(test_server:minutes(5)),
+
+ Name = leaked_processes__process_holder,
+ Name ! {get_initial_processes, self()},
+ receive
+ {initial_processes, Initial0} -> ok
+ end,
+ Initial = ordsets:from_list(Initial0),
+
+ KnownPids = ordsets:from_list([self(),Dog]),
+ Now0 = ordsets:from_list(processes()),
+ Now = ordsets:subtract(Now0, KnownPids),
+ Leaked = ordsets:subtract(Now, Initial),
+
+ _ = [begin
+ Info = process_info(P) ++ process_info(P, [current_stacktrace]),
+ io:format("~p: ~p\n", [P,Info])
+ end || P <- Leaked],
+ Comment = lists:flatten(io_lib:format("~p process(es)",
+ [length(Leaked)])),
+ {comment, Comment}.
%%
%% Internal functions...