From e08930d8c8ec17f3a1d9bfdf24498aa5aceac2cc Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?Bj=C3=B6rn=20Gustavsson?= Date: Fri, 28 Sep 2012 11:07:25 +0200 Subject: Introduce ct_group_leader_SUITE that does nasty things with group leaders --- .../group_leader_SUITE.erl | 223 +++++++++++++++++++++ 1 file changed, 223 insertions(+) create mode 100644 lib/common_test/test/ct_group_leader_SUITE_data/group_leader_SUITE.erl (limited to 'lib/common_test/test/ct_group_leader_SUITE_data') diff --git a/lib/common_test/test/ct_group_leader_SUITE_data/group_leader_SUITE.erl b/lib/common_test/test/ct_group_leader_SUITE_data/group_leader_SUITE.erl new file mode 100644 index 0000000000..c405a82882 --- /dev/null +++ b/lib/common_test/test/ct_group_leader_SUITE_data/group_leader_SUITE.erl @@ -0,0 +1,223 @@ +%% +%% %CopyrightBegin% +%% +%% Copyright Ericsson AB 2012. All Rights Reserved. +%% +%% The contents of this file are subject to the Erlang Public License, +%% Version 1.1, (the "License"); you may not use this file except in +%% compliance with the License. You should have received a copy of the +%% Erlang Public License along with this software. If not, it can be +%% retrieved online at http://www.erlang.org/. +%% +%% Software distributed under the License is distributed on an "AS IS" +%% basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See +%% the License for the specific language governing rights and limitations +%% under the License. +%% +%% %CopyrightEnd% +%% +-module(group_leader_SUITE). + +-compile(export_all). + +-include_lib("common_test/include/ct.hrl"). + +%%-------------------------------------------------------------------- +%% @spec suite() -> Info +%% Info = [tuple()] +%% @end +%%-------------------------------------------------------------------- +suite() -> + [{timetrap,{seconds,10}}]. + +%%-------------------------------------------------------------------- +%% @spec init_per_suite(Config0) -> +%% Config1 | {skip,Reason} | {skip_and_save,Reason,Config1} +%% Config0 = Config1 = [tuple()] +%% Reason = term() +%% @end +%%-------------------------------------------------------------------- +init_per_suite(Config) -> + start_my_io_server(), + Config. + +%%-------------------------------------------------------------------- +%% @spec end_per_suite(Config0) -> void() | {save_config,Config1} +%% Config0 = Config1 = [tuple()] +%% @end +%%-------------------------------------------------------------------- +end_per_suite(_Config) -> + my_io_server ! die, + ok. + +%%-------------------------------------------------------------------- +%% @spec init_per_group(GroupName, Config0) -> +%% Config1 | {skip,Reason} | {skip_and_save,Reason,Config1} +%% GroupName = atom() +%% Config0 = Config1 = [tuple()] +%% Reason = term() +%% @end +%%-------------------------------------------------------------------- +init_per_group(_GroupName, Config) -> + Config. + +%%-------------------------------------------------------------------- +%% @spec end_per_group(GroupName, Config0) -> +%% void() | {save_config,Config1} +%% GroupName = atom() +%% Config0 = Config1 = [tuple()] +%% @end +%%-------------------------------------------------------------------- +end_per_group(_GroupName, _Config) -> + ok. + +%%-------------------------------------------------------------------- +%% @spec init_per_testcase(TestCase, Config0) -> +%% Config1 | {skip,Reason} | {skip_and_save,Reason,Config1} +%% TestCase = atom() +%% Config0 = Config1 = [tuple()] +%% Reason = term() +%% @end +%%-------------------------------------------------------------------- +init_per_testcase(_TestCase, Config) -> + Config. + +%%-------------------------------------------------------------------- +%% @spec end_per_testcase(TestCase, Config0) -> +%% void() | {save_config,Config1} | {fail,Reason} +%% TestCase = atom() +%% Config0 = Config1 = [tuple()] +%% Reason = term() +%% @end +%%-------------------------------------------------------------------- +end_per_testcase(_TestCase, _Config) -> + ok. + +%%-------------------------------------------------------------------- +%% @spec groups() -> [Group] +%% Group = {GroupName,Properties,GroupsAndTestCases} +%% GroupName = atom() +%% Properties = [parallel | sequence | Shuffle | {RepeatType,N}] +%% GroupsAndTestCases = [Group | {group,GroupName} | TestCase] +%% TestCase = atom() +%% Shuffle = shuffle | {shuffle,{integer(),integer(),integer()}} +%% RepeatType = repeat | repeat_until_all_ok | repeat_until_all_fail | +%% repeat_until_any_ok | repeat_until_any_fail +%% N = integer() | forever +%% @end +%%-------------------------------------------------------------------- +groups() -> + [{p,[parallel],[p1,p2]}, + {p_restart,[parallel],[p_restart_my_io_server]}, + {seq,[],[s1,s2,s3]}, + {seq2,[],[s4,s5]}, + {seq_in_par,[parallel],[p10,p11,{group,seq},p12,{group,seq2},p13]}]. + +%%-------------------------------------------------------------------- +%% @spec all() -> GroupsAndTestCases | {skip,Reason} +%% GroupsAndTestCases = [{group,GroupName} | TestCase] +%% GroupName = atom() +%% TestCase = atom() +%% Reason = term() +%% @end +%%-------------------------------------------------------------------- +all() -> + [tc1,{group,p},{group,p_restart},p3, + {group,seq_in_par}]. + +tc1(_C) -> + ok. + +p1(_) -> + %% OTP-10101: + %% + %% External apps/processes started by init_per_suite (common operation), + %% will inherit the group leader of the init_per_suite process, i.e. the + %% test_server test case control process (executing run_test_case_msgloop/7). + %% If, later, a parallel test case triggers the external app to print with + %% e.g. io:format() (also common operation), the calling process will hang! + %% The reason for this is that a parallel test case has a dedicated IO + %% server process, other than the central test case control process. The + %% latter process is not executing run_test_case_msgloop/7 and will not + %% respond to IO messages. The process is still group leader for the + %% external app, however, which is wrong. It's the IO process for the + %% parallel test case that should be group leader - but only for the + %% particular invokation, since other parallel test cases could be + %% invoking the external app too. + print("hej\n"). + +p2(_) -> + print("hopp\n"). + +p_restart_my_io_server(_) -> + %% Restart the IO server and change its group leader. This used + %% to set to the group leader to a process that would soon die. + Ref = erlang:monitor(process, my_io_server), + my_io_server ! die, + receive + {'DOWN',Ref,_,_,_} -> + start_my_io_server() + end. + +p3(_) -> + %% OTP-10125. This would crash since the group leader process + %% for the my_io_server had died. + print("hoppsan\n"). + +print(String) -> + my_io_server ! {print,self(),String}, + receive + {printed,String} -> + ok + end. + +start_my_io_server() -> + Parent = self(), + Pid = spawn(fun() -> my_io_server(Parent) end), + receive + {Pid,started} -> + io:format("~p\n", [process_info(Pid)]), + ok + end. + +my_io_server(Parent) -> + register(my_io_server, self()), + Parent ! {self(),started}, + my_io_server_loop(). + +my_io_server_loop() -> + receive + {print,From,String} -> + io:put_chars(String), + From ! {printed,String}, + my_io_server_loop(); + die -> + ok + end. + +p10(_) -> + receive after 1 -> ok end. + +p11(_) -> + ok. + +p12(_) -> + ok. + +p13(_) -> + ok. + +s1(_) -> + ok. + +s2(_) -> + ok. + +s3(_) -> + ok. + +s4(_) -> + ok. + +s5(_) -> + ok. -- cgit v1.2.3