%% %% %CopyrightBegin% %% %% Copyright Ericsson AB 2018. All Rights Reserved. %% %% Licensed under the Apache License, Version 2.0 (the "License"); %% you may not use this file except in compliance with the License. %% You may obtain a copy of the License at %% %% http://www.apache.org/licenses/LICENSE-2.0 %% %% Unless required by applicable law or agreed to in writing, software %% distributed under the License is distributed on an "AS IS" BASIS, %% WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. %% See the License for the specific language governing permissions and %% limitations under the License. %% %% %CopyrightEnd% %% -module(logger_std_h_SUITE). -compile(export_all). -include_lib("common_test/include/ct.hrl"). -include_lib("kernel/include/logger.hrl"). -include_lib("kernel/src/logger_internal.hrl"). -include_lib("kernel/src/logger_h_common.hrl"). -include_lib("stdlib/include/ms_transform.hrl"). -include_lib("kernel/include/file.hrl"). -define(check_no_log, [] = test_server:messages_get()). -define(check(Expected), receive {log,Expected} -> [] = test_server:messages_get() after 5000 -> ct:fail({report_not_received, {line,?LINE}, {expected,Expected}, {got,test_server:messages_get()}}) end). -define(msg,"Log from "++atom_to_list(?FUNCTION_NAME)++ ":"++integer_to_list(?LINE)). -define(bin(Msg), list_to_binary(Msg++"\n")). -define(domain,#{domain=>[?MODULE]}). -define(FILESYNC_REP_INT, if is_atom(?FILESYNC_REPEAT_INTERVAL) -> 5500; true -> ?FILESYNC_REPEAT_INTERVAL + 500 end). suite() -> [{timetrap,{seconds,30}}]. init_per_suite(Config) -> timer:start(), % to avoid progress report {ok,{?STANDARD_HANDLER,#{formatter:=OrigFormatter}}} = logger:get_handler_config(?STANDARD_HANDLER), [{formatter,OrigFormatter}|Config]. end_per_suite(Config) -> {OrigMod,OrigConf} = proplists:get_value(formatter,Config), logger:set_handler_config(?STANDARD_HANDLER,formatter,{OrigMod,OrigConf}), ok. init_per_group(_Group, Config) -> Config. end_per_group(_Group, _Config) -> ok. init_per_testcase(TestHooksCase, Config) when TestHooksCase == write_failure; TestHooksCase == sync_failure -> if ?TEST_HOOKS_TAB == undefined -> {skip,"Define the TEST_HOOKS macro to run this test"}; true -> ct:print("********** ~w **********", [TestHooksCase]), Config end; init_per_testcase(TestCase, Config) -> ct:print("********** ~w **********", [TestCase]), Config. end_per_testcase(Case, Config) -> try apply(?MODULE,Case,[cleanup,Config]) catch error:undef -> ok end, ok. groups() -> []. all() -> [add_remove_instance_tty, add_remove_instance_standard_io, add_remove_instance_standard_error, add_remove_instance_file1, add_remove_instance_file2, default_formatter, errors, formatter_fail, config_fail, crash_std_h_to_file, crash_std_h_to_disk_log, bad_input, info_and_reset, reconfig, file_opts, filesync, write_failure, sync_failure, op_switch_to_sync_file, op_switch_to_sync_tty, op_switch_to_drop_file, op_switch_to_drop_tty, op_switch_to_flush_file, op_switch_to_flush_tty, limit_burst_disabled, limit_burst_enabled_one, limit_burst_enabled_period, kill_disabled, qlen_kill_new, qlen_kill_std, mem_kill_new, mem_kill_std, restart_after, handler_requests_under_load ]. add_remove_instance_tty(_Config) -> {error,{handler_not_added,{invalid_config,logger_std_h,{type,tty}}}} = logger:add_handler(?MODULE,logger_std_h, #{logger_std_h => #{type => tty}, filter_default=>log, formatter=>{?MODULE,self()}}), ok. add_remove_instance_standard_io(_Config) -> add_remove_instance_nofile(standard_io). add_remove_instance_standard_io(cleanup,_Config) -> logger_std_h_remove(). add_remove_instance_standard_error(_Config) -> add_remove_instance_nofile(standard_error). add_remove_instance_standard_error(cleanup,_Config) -> logger_std_h_remove(). add_remove_instance_file1(Config) -> Dir = ?config(priv_dir,Config), Log = filename:join(Dir,"stdlog1.txt"), Type = {file,Log}, add_remove_instance_file(Log, Type). add_remove_instance_file1(cleanup,_Config) -> logger_std_h_remove(). add_remove_instance_file2(Config) -> Dir = ?config(priv_dir,Config), Log = filename:join(Dir,"stdlog2.txt"), Type = {file,Log,[raw,append]}, add_remove_instance_file(Log, Type). add_remove_instance_file2(cleanup,_Config) -> logger_std_h_remove(). add_remove_instance_file(Log, Type) -> ok = logger:add_handler(?MODULE, logger_std_h, #{logger_std_h => #{type => Type}, filter_default=>stop, filters=>?DEFAULT_HANDLER_FILTERS([?MODULE]), formatter=>{?MODULE,self()}}), Pid = whereis(?MODULE), true = is_pid(Pid), logger:info(M1=?msg,?domain), ?check(M1), B1 = ?bin(M1), try_read_file(Log, {ok,B1}, ?FILESYNC_REP_INT), ok = logger:remove_handler(?MODULE), timer:sleep(500), undefined = whereis(?MODULE), logger:info(?msg,?domain), ?check_no_log, try_read_file(Log, {ok,B1}, ?FILESYNC_REP_INT), ok. default_formatter(_Config) -> ok = logger:set_handler_config(?STANDARD_HANDLER,formatter, {?DEFAULT_FORMATTER,?DEFAULT_FORMAT_CONFIG}), ct:capture_start(), logger:info(M1=?msg), timer:sleep(100), ct:capture_stop(), [Msg] = ct:capture_get(), match = re:run(Msg,"=INFO REPORT====.*\n"++M1,[{capture,none}]), ok. errors(Config) -> Dir = ?config(priv_dir,Config), Log = filename:join(Dir,?FUNCTION_NAME), ok = logger:add_handler(?MODULE,logger_std_h,#{}), {error,{already_exist,?MODULE}} = logger:add_handler(?MODULE,logger_std_h,#{}), {error,{not_found,no_such_name}} = logger:remove_handler(no_such_name), ok = logger:remove_handler(?MODULE), {error,{not_found,?MODULE}} = logger:remove_handler(?MODULE), {error, {handler_not_added, {invalid_config,logger_std_h,{type,faulty_type}}}} = logger:add_handler(?MODULE,logger_std_h, #{logger_std_h => #{type => faulty_type}}), NoDir = lists:concat(["/",?MODULE,"_dir"]), {error, {handler_not_added,{{open_failed,NoDir,eacces},_}}} = logger:add_handler(myh2,logger_std_h, #{logger_std_h=>#{type=>{file,NoDir}}}), {error, {handler_not_added,{{open_failed,Log,_},_}}} = logger:add_handler(myh3,logger_std_h, #{logger_std_h=>#{type=>{file,Log,[bad_file_opt]}}}), ok = logger:info(?msg). errors(cleanup,_Config) -> logger:remove_handler(?MODULE). formatter_fail(Config) -> Dir = ?config(priv_dir,Config), Log = filename:join(Dir,?FUNCTION_NAME), %% no formatter ok = logger:add_handler(?MODULE, logger_std_h, #{logger_std_h => #{type => {file,Log}}, filter_default=>stop, filters=>?DEFAULT_HANDLER_FILTERS([?MODULE])}), Pid = whereis(?MODULE), true = is_pid(Pid), {ok,#{handlers:=H}} = logger:get_logger_config(), true = lists:member(?MODULE,H), %% Formatter is added automatically {ok,{_,#{formatter:={logger_formatter,_}}}} = logger:get_handler_config(?MODULE), logger:info(M1=?msg,?domain), Got1 = try_match_file(Log,"=INFO REPORT====.*\n"++M1,5000), ok = logger:set_handler_config(?MODULE,formatter,{nonexistingmodule,#{}}), logger:info(M2=?msg,?domain), Got2 = try_match_file(Log, Got1++"=INFO REPORT====.*\nFORMATTER CRASH: .*"++M2, 5000), ok = logger:set_handler_config(?MODULE,formatter,{?MODULE,crash}), logger:info(M3=?msg,?domain), Got3 = try_match_file(Log, Got2++"=INFO REPORT====.*\nFORMATTER CRASH: .*"++M3, 5000), ok = logger:set_handler_config(?MODULE,formatter,{?MODULE,bad_return}), logger:info(?msg,?domain), try_match_file(Log, Got3++"FORMATTER ERROR: bad_return_value", 5000), %% Check that handler is still alive and was never dead Pid = whereis(?MODULE), {ok,#{handlers:=H}} = logger:get_logger_config(), ok. formatter_fail(cleanup,_Config) -> logger:remove_handler(?MODULE). config_fail(_Config) -> {error,{handler_not_added,{invalid_config,logger_std_h,{bad,bad}}}} = logger:add_handler(?MODULE,logger_std_h, #{logger_std_h => #{bad => bad}, filter_default=>log, formatter=>{?MODULE,self()}}), {error,{handler_not_added,{invalid_config,logger_std_h, {restart_type,bad}}}} = logger:add_handler(?MODULE,logger_std_h, #{logger_std_h => #{restart_type => bad}, filter_default=>log, formatter=>{?MODULE,self()}}), {error,{handler_not_added,{invalid_levels,{42,42,_}}}} = logger:add_handler(?MODULE,logger_std_h, #{logger_std_h => #{toggle_sync_qlen=>42, drop_new_reqs_qlen=>42}}), ok = logger:add_handler(?MODULE,logger_std_h, #{filter_default=>log, formatter=>{?MODULE,self()}}), {error,{illegal_config_change,_,_}} = logger:set_handler_config(?MODULE,logger_std_h, #{type=>{file,"file"}}), {error,{illegal_config_change,_,_}} = logger:set_handler_config(?MODULE,id,bad), {error,{invalid_levels,_}} = logger:set_handler_config(?MODULE,logger_std_h, #{toggle_sync_qlen=>100, flush_reqs_qlen=>99}), {error,{invalid_config,logger_std_h,{filesync_rep_int,2000}}} = logger:set_handler_config(?MODULE, logger_std_h, #{filesync_rep_int => 2000}), ok. config_fail(cleanup,_Config) -> logger:remove_handler(?MODULE). crash_std_h_to_file(Config) -> crash_std_h(Config,?FUNCTION_NAME,logger_dest,file). crash_std_h_to_file(cleanup,_Config) -> crash_std_h(cleanup). crash_std_h_to_disk_log(Config) -> crash_std_h(Config,?FUNCTION_NAME,logger_dest,disk_log). crash_std_h_to_disk_log(cleanup,_Config) -> crash_std_h(cleanup). crash_std_h(Config,Func,Var,Type) -> Dir = ?config(priv_dir,Config), File = lists:concat([?MODULE,"_",Func,".log"]), Log = filename:join(Dir,File), Pa = filename:dirname(code:which(?MODULE)), TypeAndLog = case os:type() of {win32,_} -> lists:concat([" {",Type,",\\\"",Log,"\\\"}"]); _ -> lists:concat([" \'{",Type,",\"",Log,"\"}\'"]) end, Args = lists:concat([" -kernel ",Var,TypeAndLog," -pa ",Pa]), Name = lists:concat([?MODULE,"_",Func]), ct:pal("Starting ~p with ~tp", [Name,Args]), %% Start a node which prints kernel logs to the destination specified by Type {ok,Node} = test_server:start_node(Name, peer, [{args, Args}]), Pid = rpc:call(Node,erlang,whereis,[?STANDARD_HANDLER]), ok = rpc:call(Node,logger,set_handler_config,[?STANDARD_HANDLER,formatter, {?MODULE,self()}]), ok = log_on_remote_node(Node,"dummy1"), ?check("dummy1"), {ok,Bin1} = sync_and_read(Node,Type,Log), <<"dummy1\n">> = binary:part(Bin1,{byte_size(Bin1),-7}), %% Kill the logger_std_h process exit(Pid, kill), %% Wait a bit, then check that it is gone timer:sleep(2000), undefined = rpc:call(Node,erlang,whereis,[?STANDARD_HANDLER]), %% Check that file is not empty {ok,Bin2} = sync_and_read(Node,Type,Log), <<"dummy1\n">> = binary:part(Bin2,{byte_size(Bin2),-7}), ok. %% Can not use rpc:call here, since the code would execute on a %% process with group_leader on this (the calling) node, and thus %% logger would send the log event to the logger process here instead %% of logging it itself. log_on_remote_node(Node,Msg) -> _ = spawn_link(Node, fun() -> erlang:group_leader(whereis(user),self()), logger:info(Msg) end), ok. crash_std_h(cleanup) -> Nodes = nodes(), [test_server:stop_node(Node) || Node <- Nodes]. sync_and_read(Node,disk_log,Log) -> rpc:call(Node,logger_disk_log_h,disk_log_sync,[?STANDARD_HANDLER]), case file:read_file(Log ++ ".1") of {ok,<<>>} -> timer:sleep(5000), file:read_file(Log ++ ".1"); Ok -> Ok end; sync_and_read(Node,file,Log) -> rpc:call(Node,logger_std_h,filesync,[?STANDARD_HANDLER]), case file:read_file(Log) of {ok,<<>>} -> timer:sleep(5000), file:read_file(Log); Ok -> Ok end. bad_input(_Config) -> {error,{badarg,{filesync,["BadType"]}}} = logger_std_h:filesync("BadType"), {error,{badarg,{info,["BadType"]}}} = logger_std_h:info("BadType"), {error,{badarg,{reset,["BadType"]}}} = logger_std_h:reset("BadType"). info_and_reset(_Config) -> #{id := ?STANDARD_HANDLER} = logger_std_h:info(?STANDARD_HANDLER), ok = logger_std_h:reset(?STANDARD_HANDLER). reconfig(Config) -> Dir = ?config(priv_dir,Config), ok = logger:add_handler(?MODULE, logger_std_h, #{logger_std_h => #{type => standard_io}, filter_default=>log, filters=>?DEFAULT_HANDLER_FILTERS([?MODULE]), formatter=>{?MODULE,self()}}), #{id := ?MODULE, type := standard_io, file_ctrl_pid := FileCtrlPid, toggle_sync_qlen := ?TOGGLE_SYNC_QLEN, drop_new_reqs_qlen := ?DROP_NEW_REQS_QLEN, flush_reqs_qlen := ?FLUSH_REQS_QLEN, enable_burst_limit := ?ENABLE_BURST_LIMIT, burst_limit_size := ?BURST_LIMIT_SIZE, burst_window_time := ?BURST_WINDOW_TIME, enable_kill_overloaded := ?ENABLE_KILL_OVERLOADED, handler_overloaded_qlen := ?HANDLER_OVERLOADED_QLEN, handler_overloaded_mem := ?HANDLER_OVERLOADED_MEM, handler_restart_after := ?HANDLER_RESTART_AFTER, filesync_repeat_interval := ?FILESYNC_REPEAT_INTERVAL} = logger_std_h:info(?MODULE), ok = logger:set_handler_config(?MODULE, logger_std_h, #{toggle_sync_qlen => 1, drop_new_reqs_qlen => 2, flush_reqs_qlen => 3, enable_burst_limit => false, burst_limit_size => 10, burst_window_time => 10, enable_kill_overloaded => true, handler_overloaded_qlen => 100000, handler_overloaded_mem => 10000000, handler_restart_after => never, filesync_repeat_interval => no_repeat}), #{id := ?MODULE, type := standard_io, file_ctrl_pid := FileCtrlPid, toggle_sync_qlen := 1, drop_new_reqs_qlen := 2, flush_reqs_qlen := 3, enable_burst_limit := false, burst_limit_size := 10, burst_window_time := 10, enable_kill_overloaded := true, handler_overloaded_qlen := 100000, handler_overloaded_mem := 10000000, handler_restart_after := never, filesync_repeat_interval := no_repeat} = logger_std_h:info(?MODULE), ok. reconfig(cleanup, _Config) -> logger:remove_handler(?MODULE). file_opts(Config) -> Dir = ?config(priv_dir,Config), Log = filename:join(Dir, lists:concat([?FUNCTION_NAME,".log"])), BadFileOpts = [raw], BadType = {file,Log,BadFileOpts}, {error,{handler_not_added,{{open_failed,Log,enoent},_}}} = logger:add_handler(?MODULE, logger_std_h, #{logger_std_h => #{type => BadType}}), OkFileOpts = [raw,append], OkType = {file,Log,OkFileOpts}, ok = logger:add_handler(?MODULE, logger_std_h, #{logger_std_h => #{type => OkType}, filter_default=>log, filters=>?DEFAULT_HANDLER_FILTERS([?MODULE]), formatter=>{?MODULE,self()}}), #{type := OkType} = logger_std_h:info(?MODULE), logger:info(M1=?msg,?domain), ?check(M1), B1 = ?bin(M1), try_read_file(Log, {ok,B1}, ?FILESYNC_REP_INT), ok. file_opts(cleanup, _Config) -> logger:remove_handler(?MODULE). filesync(Config) -> Dir = ?config(priv_dir,Config), Log = filename:join(Dir, lists:concat([?FUNCTION_NAME,".log"])), Type = {file,Log}, ok = logger:add_handler(?MODULE, logger_std_h, #{logger_std_h => #{type => Type}, filter_default=>log, filters=>?DEFAULT_HANDLER_FILTERS([?MODULE]), formatter=>{?MODULE,nl}}), %% check repeated filesync happens start_tracer([{logger_std_h, write_to_dev, 5}, {logger_std_h, sync_dev, 4}, {file, datasync, 1}], [{logger_std_h, write_to_dev, <<"first\n">>}, {logger_std_h, sync_dev}, {file,datasync}]), logger:info("first", ?domain), %% wait for automatic filesync check_tracer(?FILESYNC_REP_INT*2), %% check that explicit filesync is only done once start_tracer([{logger_std_h, write_to_dev, 5}, {logger_std_h, sync_dev, 4}, {file, datasync, 1}], [{logger_std_h, write_to_dev, <<"second\n">>}, {logger_std_h, sync_dev}, {file,datasync}, {no_more,500} ]), logger:info("second", ?domain), %% do explicit filesync logger_std_h:filesync(?MODULE), %% a second filesync should be ignored logger_std_h:filesync(?MODULE), check_tracer(100), %% check that if there's no repeated filesync active, %% a filesync is still performed when handler goes idle logger:set_handler_config(?MODULE, logger_std_h, #{filesync_repeat_interval => no_repeat}), no_repeat = maps:get(filesync_repeat_interval, logger_std_h:info(?MODULE)), %% The following timer is to make sure the time from last log %% ("second") to next ("third") is long enough, so the a flush is %% triggered by the idle timeout between "thrid" and "fourth". timer:sleep(?IDLE_DETECT_TIME_MSEC*2), start_tracer([{logger_std_h, write_to_dev, 5}, {logger_std_h, sync_dev, 4}, {file, datasync, 1}], [{logger_std_h, write_to_dev, <<"third\n">>}, {logger_std_h, sync_dev}, {file,datasync}, {logger_std_h, write_to_dev, <<"fourth\n">>}, {logger_std_h, sync_dev}, {file,datasync}]), logger:info("third", ?domain), %% wait for automatic filesync timer:sleep(?IDLE_DETECT_TIME_MSEC*2), logger:info("fourth", ?domain), %% wait for automatic filesync check_tracer(?IDLE_DETECT_TIME_MSEC*2), %% switch repeated filesync on and verify that the looping works SyncInt = 1000, WaitT = 4500, OneSync = {logger_std_h,handle_cast,repeated_filesync}, %% receive 1 initial repeated_filesync, then 1 per sec start_tracer([{logger_std_h,handle_cast,2}], [OneSync || _ <- lists:seq(1, 1 + trunc(WaitT/SyncInt))]), logger:set_handler_config(?MODULE, logger_std_h, #{filesync_repeat_interval => SyncInt}), SyncInt = maps:get(filesync_repeat_interval, logger_std_h:info(?MODULE)), timer:sleep(WaitT), logger:set_handler_config(?MODULE, logger_std_h, #{filesync_repeat_interval => no_repeat}), check_tracer(100), ok. filesync(cleanup, _Config) -> dbg:stop_clear(), logger:remove_handler(?MODULE). write_failure(Config) -> Dir = ?config(priv_dir, Config), File = lists:concat([?MODULE,"_",?FUNCTION_NAME,".log"]), Log = filename:join(Dir, File), Node = start_std_h_on_new_node(Config, ?FUNCTION_NAME, Log), false = (undefined == rpc:call(Node, ets, whereis, [?TEST_HOOKS_TAB])), rpc:call(Node, ets, insert, [?TEST_HOOKS_TAB,{tester,self()}]), rpc:call(Node, ?MODULE, set_internal_log, [?MODULE,internal_log]), rpc:call(Node, ?MODULE, set_result, [file_write,ok]), ok = log_on_remote_node(Node, "Logged1"), rpc:call(Node, logger_std_h, filesync, [?STANDARD_HANDLER]), ?check_no_log, try_read_file(Log, {ok,<<"Logged1\n">>}, ?FILESYNC_REP_INT), rpc:call(Node, ?MODULE, set_result, [file_write,{error,terminated}]), ok = log_on_remote_node(Node, "Cause simple error printout"), ?check({error,{?STANDARD_HANDLER,write,Log,{error,terminated}}}), ok = log_on_remote_node(Node, "No second error printout"), ?check_no_log, rpc:call(Node, ?MODULE, set_result, [file_write,{error,eacces}]), ok = log_on_remote_node(Node, "Cause simple error printout"), ?check({error,{?STANDARD_HANDLER,write,Log,{error,eacces}}}), rpc:call(Node, ?MODULE, set_result, [file_write,ok]), ok = log_on_remote_node(Node, "Logged2"), rpc:call(Node, logger_std_h, filesync, [?STANDARD_HANDLER]), ?check_no_log, try_read_file(Log, {ok,<<"Logged1\nLogged2\n">>}, ?FILESYNC_REP_INT), ok. write_failure(cleanup, _Config) -> Nodes = nodes(), [test_server:stop_node(Node) || Node <- Nodes]. sync_failure(Config) -> Dir = ?config(priv_dir, Config), File = lists:concat([?MODULE,"_",?FUNCTION_NAME,".log"]), Log = filename:join(Dir, File), Node = start_std_h_on_new_node(Config, ?FUNCTION_NAME, Log), false = (undefined == rpc:call(Node, ets, whereis, [?TEST_HOOKS_TAB])), rpc:call(Node, ets, insert, [?TEST_HOOKS_TAB,{tester,self()}]), rpc:call(Node, ?MODULE, set_internal_log, [?MODULE,internal_log]), rpc:call(Node, ?MODULE, set_result, [file_datasync,ok]), SyncInt = 500, ok = rpc:call(Node, logger, set_handler_config, [?STANDARD_HANDLER, logger_std_h, #{filesync_repeat_interval => SyncInt}]), Info = rpc:call(Node, logger_std_h, info, [?STANDARD_HANDLER]), SyncInt = maps:get(filesync_repeat_interval, Info), ok = log_on_remote_node(Node, "Logged1"), ?check_no_log, rpc:call(Node, ?MODULE, set_result, [file_datasync,{error,terminated}]), ok = log_on_remote_node(Node, "Cause simple error printout"), ?check({error,{?STANDARD_HANDLER,filesync,Log,{error,terminated}}}), ok = log_on_remote_node(Node, "No second error printout"), ?check_no_log, rpc:call(Node, ?MODULE, set_result, [file_datasync,{error,eacces}]), ok = log_on_remote_node(Node, "Cause simple error printout"), ?check({error,{?STANDARD_HANDLER,filesync,Log,{error,eacces}}}), rpc:call(Node, ?MODULE, set_result, [file_datasync,ok]), ok = log_on_remote_node(Node, "Logged2"), ?check_no_log, ok. sync_failure(cleanup, _Config) -> Nodes = nodes(), [test_server:stop_node(Node) || Node <- Nodes]. start_std_h_on_new_node(_Config, Func, Log) -> Pa = filename:dirname(code:which(?MODULE)), Dest = case os:type() of {win32,_} -> lists:concat([" {file,\\\"",Log,"\\\"}"]); _ -> lists:concat([" \'{file,\"",Log,"\"}\'"]) end, Args = lists:concat([" -kernel ",logger_dest,Dest," -pa ",Pa]), Name = lists:concat([?MODULE,"_",Func]), ct:pal("Starting ~s with ~tp", [Name,Args]), {ok,Node} = test_server:start_node(Name, peer, [{args, Args}]), Pid = rpc:call(Node,erlang,whereis,[?STANDARD_HANDLER]), true = is_pid(Pid), ok = rpc:call(Node,logger,set_handler_config,[?STANDARD_HANDLER,formatter, {?MODULE,nl}]), Node. %% functions for test hook macros to be called by rpc set_internal_log(Mod, Func) -> ?set_internal_log({Mod,Func}). set_result(Op, Result) -> ?set_result(Op, Result). set_defaults() -> ?set_defaults(). %% internal log function that sends the term to the test case process internal_log(Type, Term) -> [{tester,Tester}] = ets:lookup(?TEST_HOOKS_TAB, tester), Tester ! {log,{Type,Term}}, logger:internal_log(Type, Term), ok. %%%----------------------------------------------------------------- %%% Overload protection tests op_switch_to_sync_file(Config) -> {Log,HConfig,StdHConfig} = start_handler(?MODULE, ?FUNCTION_NAME, Config), NewHConfig = HConfig#{logger_std_h => StdHConfig#{toggle_sync_qlen => 3, drop_new_reqs_qlen => 501, flush_reqs_qlen => 2000, enable_burst_limit => false}}, ok = logger:set_handler_config(?MODULE, NewHConfig), %% TRecvPid = start_op_trace(), NumOfReqs = 500, send_burst({n,NumOfReqs}, seq, {chars,79}, info), NumOfReqs = count_lines(Log), %% true = analyse_trace(TRecvPid, %% fun(Events) -> find_mode(async,Events) end), %% true = analyse_trace(TRecvPid, %% fun(Events) -> find_mode(sync,Events) end), %% true = analyse_trace(TRecvPid, %% fun(Events) -> find_switch(async,sync,Events) end), %% false = analyse_trace(TRecvPid, %% fun(Events) -> find_mode(drop,Events) end), %% false = analyse_trace(TRecvPid, %% fun(Events) -> find_mode(flush,Events) end), ok = file:delete(Log), %% stop_op_trace(TRecvPid), ok. op_switch_to_sync_file(cleanup, _Config) -> ok = stop_handler(?MODULE). op_switch_to_sync_tty(Config) -> {HConfig,StdHConfig} = start_handler(?MODULE, standard_io, Config), NewHConfig = HConfig#{logger_std_h => StdHConfig#{toggle_sync_qlen => 3, drop_new_reqs_qlen => 501, flush_reqs_qlen => 2000, enable_burst_limit => false}}, ok = logger:set_handler_config(?MODULE, NewHConfig), NumOfReqs = 500, send_burst({n,NumOfReqs}, seq, {chars,79}, info), ok. op_switch_to_sync_tty(cleanup, _Config) -> ok = stop_handler(?MODULE). op_switch_to_drop_file(Config) -> {Log,HConfig,StdHConfig} = start_handler(?MODULE, ?FUNCTION_NAME, Config), NewHConfig = HConfig#{logger_std_h => StdHConfig#{toggle_sync_qlen => 2, drop_new_reqs_qlen => 3, flush_reqs_qlen => 600, enable_burst_limit => false}}, ok = logger:set_handler_config(?MODULE, NewHConfig), %% TRecvPid = start_op_trace(), NumOfReqs = 500, send_burst({n,NumOfReqs}, seq, {chars,79}, info), Logged = count_lines(Log), ct:pal("Number of messages dropped = ~w (~w)", [NumOfReqs-Logged,NumOfReqs]), true = (Logged < NumOfReqs), %% true = analyse_trace(TRecvPid, %% fun(Events) -> find_mode(async,Events) end), %% true = analyse_trace(TRecvPid, %% fun(Events) -> find_mode(drop,Events) end), %% false = analyse_trace(TRecvPid, %% fun(Events) -> find_mode(flush,Events) end), %% true = analyse_trace(TRecvPid, %% fun(Events) -> find_switch(async,drop,Events) %% orelse find_switch(sync,drop,Events) %% end), ok = file:delete(Log), %% stop_op_trace(TRecvPid), ok. op_switch_to_drop_file(cleanup, _Config) -> ok = stop_handler(?MODULE). op_switch_to_drop_tty(Config) -> {HConfig,StdHConfig} = start_handler(?MODULE, standard_io, Config), NewHConfig = HConfig#{logger_std_h => StdHConfig#{toggle_sync_qlen => 2, drop_new_reqs_qlen => 3, flush_reqs_qlen => 600, enable_burst_limit => false}}, ok = logger:set_handler_config(?MODULE, NewHConfig), NumOfReqs = 500, send_burst({n,NumOfReqs}, seq, {chars,79}, info), ok. op_switch_to_drop_tty(cleanup, _Config) -> ok = stop_handler(?MODULE). op_switch_to_flush_file() -> [{timetrap,{minutes,3}}]. op_switch_to_flush_file(Config) -> {Log,HConfig,StdHConfig} = start_handler(?MODULE, ?FUNCTION_NAME, Config), %% it's important that both async and sync requests have been queued %% when the flush happens (verify with coverage of flush_log_requests/2) NewHConfig = HConfig#{logger_std_h => StdHConfig#{toggle_sync_qlen => 2, drop_new_reqs_qlen => 99, flush_reqs_qlen => 100, enable_burst_limit => false}}, ok = logger:set_handler_config(?MODULE, NewHConfig), NumOfReqs = 10000, Procs = 100, send_burst({n,NumOfReqs}, {spawn,Procs,0}, {chars,79}, info), Logged = count_lines(Log), ct:pal("Number of messages flushed/dropped = ~w (~w)", [(NumOfReqs*Procs)-Logged,NumOfReqs*Procs]), true = (Logged < (NumOfReqs*Procs)), %%! --- Thu Apr 12 13:46:00 2018 --- peppe was here! %%! TODO: Verify that handler has switched to flush mode ok = file:delete(Log), ok. op_switch_to_flush_file(cleanup, _Config) -> ok = stop_handler(?MODULE). op_switch_to_flush_tty(Config) -> {HConfig,StdHConfig} = start_handler(?MODULE, standard_io, Config), %% it's important that both async and sync requests have been queued %% when the flush happens (verify with coverage of flush_log_requests/2) NewHConfig = HConfig#{logger_std_h => StdHConfig#{toggle_sync_qlen => 2, drop_new_reqs_qlen => 99, flush_reqs_qlen => 100, enable_burst_limit => false}}, ok = logger:set_handler_config(?MODULE, NewHConfig), NumOfReqs = 10000, Procs = 10, send_burst({n,NumOfReqs}, {spawn,Procs,0}, {chars,79}, info), ok. op_switch_to_flush_tty(cleanup, _Config) -> ok = stop_handler(?MODULE). limit_burst_disabled(Config) -> {Log,HConfig,StdHConfig} = start_handler(?MODULE, ?FUNCTION_NAME, Config), NewHConfig = HConfig#{logger_std_h => StdHConfig#{enable_burst_limit => false, burst_limit_size => 10, burst_window_time => 2000, drop_new_reqs_qlen => 200, flush_reqs_qlen => 300}}, ok = logger:set_handler_config(?MODULE, NewHConfig), NumOfReqs = 100, send_burst({n,NumOfReqs}, seq, {chars,79}, info), Logged = count_lines(Log), ct:pal("Number of messages logged = ~w", [Logged]), ok = file:delete(Log), NumOfReqs = Logged. limit_burst_disabled(cleanup, _Config) -> ok = stop_handler(?MODULE). limit_burst_enabled_one(Config) -> {Log,HConfig,StdHConfig} = start_handler(?MODULE, ?FUNCTION_NAME, Config), ReqLimit = 10, NewHConfig = HConfig#{logger_std_h => StdHConfig#{enable_burst_limit => true, burst_limit_size => ReqLimit, burst_window_time => 2000, drop_new_reqs_qlen => 200, flush_reqs_qlen => 300}}, ok = logger:set_handler_config(?MODULE, NewHConfig), NumOfReqs = 100, send_burst({n,NumOfReqs}, seq, {chars,79}, info), Logged = count_lines(Log), ct:pal("Number of messages logged = ~w", [Logged]), ok = file:delete(Log), ReqLimit = Logged. limit_burst_enabled_one(cleanup, _Config) -> ok = stop_handler(?MODULE). limit_burst_enabled_period(Config) -> {Log,HConfig,StdHConfig} = start_handler(?MODULE, ?FUNCTION_NAME, Config), ReqLimit = 10, BurstTWin = 1000, NewHConfig = HConfig#{logger_std_h => StdHConfig#{enable_burst_limit => true, burst_limit_size => ReqLimit, burst_window_time => BurstTWin, drop_new_reqs_qlen => 20000, flush_reqs_qlen => 20001}}, ok = logger:set_handler_config(?MODULE, NewHConfig), Windows = 3, Sent = send_burst({t,BurstTWin*Windows}, seq, {chars,79}, info), Logged = count_lines(Log), ct:pal("Number of messages sent = ~w~nNumber of messages logged = ~w", [Sent,Logged]), ok = file:delete(Log), true = (Logged > (ReqLimit*Windows)) andalso (Logged < (ReqLimit*(Windows+2))). limit_burst_enabled_period(cleanup, _Config) -> ok = stop_handler(?MODULE). kill_disabled(Config) -> {Log,HConfig,StdHConfig} = start_handler(?MODULE, ?FUNCTION_NAME, Config), NewHConfig = HConfig#{logger_std_h=>StdHConfig#{enable_kill_overloaded=>false, handler_overloaded_qlen=>10, handler_overloaded_mem=>100}}, ok = logger:set_handler_config(?MODULE, NewHConfig), NumOfReqs = 100, send_burst({n,NumOfReqs}, seq, {chars,79}, info), Logged = count_lines(Log), ct:pal("Number of messages logged = ~w", [Logged]), ok = file:delete(Log), true = is_pid(whereis(?MODULE)), ok. kill_disabled(cleanup, _Config) -> ok = stop_handler(?MODULE). qlen_kill_new(Config) -> {Log,HConfig,StdHConfig} = start_handler(?MODULE, ?FUNCTION_NAME, Config), Pid0 = whereis(?MODULE), {_,Mem0} = process_info(Pid0, memory), RestartAfter = 2000, NewHConfig = HConfig#{logger_std_h=>StdHConfig#{enable_kill_overloaded=>true, handler_overloaded_qlen=>10, handler_overloaded_mem=>Mem0+50000, handler_restart_after=>RestartAfter}}, ok = logger:set_handler_config(?MODULE, NewHConfig), MRef = erlang:monitor(process, Pid0), NumOfReqs = 100, Procs = 2, send_burst({n,NumOfReqs}, {spawn,Procs,0}, {chars,79}, info), %% send_burst({n,NumOfReqs}, seq, {chars,79}, info), receive {'DOWN', MRef, _, _, Info} -> case Info of {shutdown,{overloaded,?MODULE,QLen,Mem}} -> ct:pal("Terminated with qlen = ~w, mem = ~w", [QLen,Mem]); killed -> ct:pal("Slow shutdown, handler process was killed!", []) end, timer:sleep(RestartAfter + 1000), true = is_pid(whereis(?MODULE)), ok after 5000 -> Info = logger_std_h:info(?MODULE), ct:pal("Handler state = ~p", [Info]), ct:fail("Handler not dead! It should not have survived this!") end. qlen_kill_new(cleanup, _Config) -> ok = stop_handler(?MODULE). %% choke the standard handler on remote node to verify the termination %% works as expected qlen_kill_std(Config) -> %%! HERE %% Dir = ?config(priv_dir, Config), %% File = lists:concat([?MODULE,"_",?FUNCTION_NAME,".log"]), %% Log = filename:join(Dir, File), %% Node = start_std_h_on_new_node(Config, ?FUNCTION_NAME, Log), %% ok = rpc:call(Node, logger, set_handler_config, %% [?STANDARD_HANDLER, logger_std_h, %% #{enable_kill_overloaded=>true, %% handler_overloaded_qlen=>10, %% handler_overloaded_mem=>100000}]), {skip,"Not done yet"}. mem_kill_new(Config) -> {Log,HConfig,StdHConfig} = start_handler(?MODULE, ?FUNCTION_NAME, Config), Pid0 = whereis(?MODULE), {_,Mem0} = process_info(Pid0, memory), RestartAfter = 2000, NewHConfig = HConfig#{logger_std_h=>StdHConfig#{enable_kill_overloaded=>true, handler_overloaded_qlen=>50000, handler_overloaded_mem=>Mem0+500, handler_restart_after=>RestartAfter}}, ok = logger:set_handler_config(?MODULE, NewHConfig), MRef = erlang:monitor(process, Pid0), NumOfReqs = 100, Procs = 2, send_burst({n,NumOfReqs}, {spawn,Procs,0}, {chars,79}, info), %% send_burst({n,NumOfReqs}, seq, {chars,79}, info), receive {'DOWN', MRef, _, _, Info} -> case Info of {shutdown,{overloaded,?MODULE,QLen,Mem}} -> ct:pal("Terminated with qlen = ~w, mem = ~w", [QLen,Mem]); killed -> ct:pal("Slow shutdown, handler process was killed!", []) end, timer:sleep(RestartAfter * 2), true = is_pid(whereis(?MODULE)), ok after 5000 -> Info = logger_std_h:info(?MODULE), ct:pal("Handler state = ~p", [Info]), ct:fail("Handler not dead! It should not have survived this!") end. mem_kill_new(cleanup, _Config) -> ok = stop_handler(?MODULE). %% choke the standard handler on remote node to verify the termination %% works as expected mem_kill_std(Config) -> {skip,"Not done yet"}. restart_after(Config) -> {Log,HConfig,StdHConfig} = start_handler(?MODULE, ?FUNCTION_NAME, Config), NewHConfig1 = HConfig#{logger_std_h=>StdHConfig#{enable_kill_overloaded=>true, handler_overloaded_qlen=>10, handler_restart_after=>never}}, ok = logger:set_handler_config(?MODULE, NewHConfig1), MRef1 = erlang:monitor(process, whereis(?MODULE)), %% kill handler send_burst({n,100}, {spawn,2,0}, {chars,79}, info), receive {'DOWN', MRef1, _, _, _Info1} -> timer:sleep(?HANDLER_RESTART_AFTER + 1000), undefined = whereis(?MODULE), ok after 5000 -> ct:fail("Handler not dead! It should not have survived this!") end, {Log,_,_} = start_handler(?MODULE, ?FUNCTION_NAME, Config), RestartAfter = 2000, NewHConfig2 = HConfig#{logger_std_h=>StdHConfig#{enable_kill_overloaded=>true, handler_overloaded_qlen=>10, handler_restart_after=>RestartAfter}}, ok = logger:set_handler_config(?MODULE, NewHConfig2), Pid0 = whereis(?MODULE), MRef2 = erlang:monitor(process, Pid0), %% kill handler send_burst({n,100}, {spawn,2,0}, {chars,79}, info), receive {'DOWN', MRef2, _, _, _Info2} -> timer:sleep(RestartAfter + 1000), Pid1 = whereis(?MODULE), true = is_pid(Pid1), false = (Pid1 == Pid0), ok after 5000 -> ct:fail("Handler not dead! It should not have survived this!") end, ok. restart_after(cleanup, _Config) -> ok = stop_handler(?MODULE). %% send handler requests (filesync, info, reset, change_config) %% during high load to verify that sync, dropping and flushing is %% handled correctly. handler_requests_under_load() -> [{timetrap,{minutes,3}}]. handler_requests_under_load(Config) -> {Log,HConfig,StdHConfig} = start_handler(?MODULE, ?FUNCTION_NAME, Config), NewHConfig = HConfig#{logger_std_h => StdHConfig#{toggle_sync_qlen => 2, drop_new_reqs_qlen => 1000, flush_reqs_qlen => 2000, enable_burst_limit => false}}, ok = logger:set_handler_config(?MODULE, NewHConfig), Pid = spawn_link(fun() -> send_requests(?MODULE, 1, [{filesync,[]}, {info,[]}, {reset,[]}, {change_config,[]}]) end), Sent = send_burst({t,10000}, seq, {chars,79}, info), Pid ! {self(),finish}, ReqResult = receive {Pid,Result} -> Result end, Logged = count_lines(Log), ct:pal("Number of messages sent = ~w~nNumber of messages logged = ~w", [Sent,Logged]), FindError = fun(Res) -> [E || E <- Res, is_tuple(E) andalso (element(1,E) == error)] end, Errors = [{Req,FindError(Res)} || {Req,Res} <- ReqResult], NoOfReqs = lists:foldl(fun({_,Res}, N) -> N + length(Res) end, 0, ReqResult), ct:pal("~w requests made. Errors: ~n~p", [NoOfReqs,Errors]), ok = file:delete(Log). handler_requests_under_load(cleanup, Config) -> ok = stop_handler(?MODULE). send_requests(HName, TO, Reqs = [{Req,Res}|Rs]) -> receive {From,finish} -> From ! {self(),Reqs} after TO -> Result = case Req of change_config -> logger:set_handler_config(HName, logger_std_h, #{enable_kill_overloaded => false}); Func -> logger_std_h:Func(HName) end, send_requests(HName, TO, Rs ++ [{Req,[Result|Res]}]) end. %%%----------------------------------------------------------------- %%% start_handler(Name, TTY, Config) when TTY == standard_io; TTY == standard_error-> ok = logger:add_handler(Name, logger_std_h, #{logger_std_h => #{type => TTY}, filter_default=>log, filters=>?DEFAULT_HANDLER_FILTERS([Name]), formatter=>{?MODULE,op}}), {ok,{_,HConfig = #{logger_std_h := StdHConfig}}} = logger:get_handler_config(Name), {HConfig,StdHConfig}; start_handler(Name, FuncName, Config) -> Dir = ?config(priv_dir,Config), Log = filename:join(Dir, lists:concat([FuncName,".log"])), ct:pal("Logging to ~tp", [Log]), Type = {file,Log}, ok = logger:add_handler(Name, logger_std_h, #{logger_std_h => #{type => Type}, filter_default=>log, filters=>?DEFAULT_HANDLER_FILTERS([Name]), formatter=>{?MODULE,op}}), {ok,{_,HConfig = #{logger_std_h := StdHConfig}}} = logger:get_handler_config(Name), {Log,HConfig,StdHConfig}. stop_handler(Name) -> ok = logger:remove_handler(Name), ct:pal("Handler ~p stopped!", [Name]). count_lines(File) -> wait_until_written(File, -1), count_lines1(File). wait_until_written(File, Sz) -> timer:sleep(2000), case file:read_file_info(File) of {ok,#file_info{size = Sz}} -> timer:sleep(1000), case file:read_file_info(File) of {ok,#file_info{size = Sz1}} -> ok; {ok,#file_info{size = Sz2}} -> wait_until_written(File, Sz2) end; {ok,#file_info{size = Sz1}} -> wait_until_written(File, Sz1) end. count_lines1(File) -> Counter = fun Cnt(Dev,LC) -> case file:read_line(Dev) of eof -> LC; _ -> Cnt(Dev,LC+1) end end, {_,Dev} = file:open(File, [read]), Lines = Counter(Dev, 0), file:close(Dev), Lines. send_burst(NorT, Type, {chars,Sz}, Class) -> Text = [34 + rand:uniform(126-34) || _ <- lists:seq(1,Sz)], case NorT of {n,N} -> %% process_flag(priority, high), send_n_burst(N, Type, Text, Class), %% process_flag(priority, normal), N; {t,T} -> ct:pal("Sending messages sequentially for ~w ms", [T]), T0 = erlang:monotonic_time(millisecond), send_t_burst(T0, T, Text, Class, 0) end. send_n_burst(0, _, _Text, _Class) -> ok; send_n_burst(N, seq, Text, Class) -> ok = logger:Class(Text, ?domain), send_n_burst(N-1, seq, Text, Class); send_n_burst(N, {spawn,Ps,TO}, Text, Class) -> ct:pal("~w processes each sending ~w messages", [Ps,N]), PerProc = fun() -> send_n_burst(N, seq, Text, Class) end, MRefs = [begin if TO == 0 -> ok; true -> timer:sleep(TO) end, monitor(process,spawn_link(PerProc)) end || _ <- lists:seq(1,Ps)], lists:foreach(fun(MRef) -> receive {'DOWN', MRef, _, _, _} -> ok end end, MRefs), ct:pal("Message burst sent", []), ok. send_t_burst(T0, T, Text, Class, N) -> T1 = erlang:monotonic_time(millisecond), if (T1-T0) > T -> N; true -> ok = logger:Class(Text, ?domain), send_t_burst(T0, T, Text, Class, N+1) end. %%%----------------------------------------------------------------- %%% Formatter callback %%% Using this to send the formatted string back to the test case %%% process - so it can check for logged events. format(_,bad_return) -> bad_return; format(_,crash) -> erlang:error(formatter_crashed); format(#{msg:={string,String0}},no_nl) -> String = unicode:characters_to_list(String0), String; format(#{msg:={string,String0}},nl) -> String = unicode:characters_to_list(String0), String++"\n"; format(#{msg:={string,String0}},op) -> String = unicode:characters_to_list(String0), String++"\n"; format(#{msg:={report,#{label:={supervisor,progress}}}},op) -> ""; format(#{msg:={report,#{label:={gen_server,terminate}}}},op) -> ""; format(#{msg:={report,#{label:={proc_lib,crash}}}},op) -> ""; format(#{msg:={F,A}},Pid) when is_list(F), is_list(A) -> String = lists:flatten(io_lib:format(F,A)), Pid ! {log,String}, String++"\n"; format(#{msg:={string,String0}},Pid) -> String = unicode:characters_to_list(String0), Pid ! {log,String}, String++"\n". add_remove_instance_nofile(Type) -> ok = logger:add_handler(?MODULE,logger_std_h, #{logger_std_h => #{type => Type}, filter_default=>stop, filters=>?DEFAULT_HANDLER_FILTERS([?MODULE]), formatter=>{?MODULE,self()}}), Pid = whereis(?MODULE), true = is_pid(Pid), group_leader(group_leader(),Pid), % to get printouts in test log logger:info(M1=?msg,?domain), ?check(M1), %% check that filesync doesn't do damage even if not relevant ok = logger_std_h:filesync(?MODULE), ok = logger:remove_handler(?MODULE), timer:sleep(500), undefined = whereis(?MODULE), logger:info(?msg,?domain), ?check_no_log, ok. logger_std_h_remove() -> logger:remove_handler(?MODULE). logger_std_h_remove(Id) -> logger:remove_handler(Id). try_read_file(FileName, Expected, Time) when Time > 0 -> case file:read_file(FileName) of Expected -> ok; Error = {error,_Reason} -> ct:pal("Can't read ~tp: ~tp", [FileName,Error]), erlang:error(Error); Got -> ct:pal("try_read_file got ~tp", [Got]), timer:sleep(500), try_read_file(FileName, Expected, Time-500) end; try_read_file(FileName, Expected, _) -> ct:pal("Missing pattern ~tp in ~tp", [Expected,FileName]), erlang:error({error,missing_expected_pattern}). try_match_file(FileName, Pattern, Time) -> try_match_file(FileName, Pattern, Time, <<>>). try_match_file(FileName, Pattern, Time, _) when Time > 0 -> case file:read_file(FileName) of {ok, Bin} -> case re:run(Bin,Pattern,[{capture,none}]) of match -> unicode:characters_to_list(Bin); _ -> timer:sleep(100), try_match_file(FileName, Pattern, Time-100, Bin) end; Error -> erlang:error(Error) end; try_match_file(_,Pattern,_,Incorrect) -> ct:pal("try_match_file did not match pattern: ~p~nGot: ~p~n", [Pattern,Incorrect]), erlang:error({error,not_matching_pattern,Pattern,Incorrect}). %%%----------------------------------------------------------------- %%% start_op_trace() -> TraceFun = fun({trace,_,call,{_Mod,Func,Details}}, Pid) -> Pid ! {trace_call,Func,Details}, Pid; ({trace,_,return_from,{_Mod,Func,_},RetVal}, Pid) -> Pid ! {trace_return,Func,RetVal}, Pid end, TRecvPid = spawn_link(fun() -> trace_receiver(5000) end), {ok,_} = dbg:tracer(process, {TraceFun, TRecvPid}), {ok,_} = dbg:p(whereis(?MODULE), [c]), {ok,_} = dbg:p(self(), [c]), MS1 = dbg:fun2ms(fun([_]) -> return_trace() end), {ok,_} = dbg:tp(logger_h_common, check_load, 1, MS1), {ok,_} = dbg:tpl(logger_h_common, flush_log_requests, 2, []), MS2 = dbg:fun2ms(fun([_,mode]) -> return_trace() end), {ok,_} = dbg:tpl(ets, lookup, 2, MS2), ct:pal("Tracing started!", []), TRecvPid. stop_op_trace(TRecvPid) -> dbg:stop_clear(), unlink(TRecvPid), exit(TRecvPid, kill), ok. find_mode(flush, Events) -> lists:any(fun({trace_call,flush_log_requests,[_,_]}) -> true; (_) -> false end, Events); find_mode(Mode, Events) -> lists:keymember([{mode,Mode}], 3, Events). find_switch(From, To, Events) -> try lists:foldl(fun({trace_return,check_load,{To,_,_,_}}, {trace_call,check_load,[#{mode := From}]}) -> throw(match); (Event, _) -> Event end, undefined, Events) of _ -> false catch throw:match -> true end. analyse_trace(TRecvPid, TestFun) -> TRecvPid ! {test,self(),TestFun}, receive {result,TRecvPid,Result} -> Result after 60000 -> fails end. trace_receiver(IdleT) -> Msgs = receive_until_idle(IdleT, 5, []), ct:pal("~w trace events generated", [length(Msgs)]), analyse(Msgs). receive_until_idle(IdleT, WaitN, Msgs) -> receive Msg = {trace_call,_,_} -> receive_until_idle(IdleT, 5, [Msg | Msgs]); Msg = {trace_return,_,_} -> receive_until_idle(IdleT, 5, [Msg | Msgs]) after IdleT -> if WaitN == 0 -> Msgs; true -> receive_until_idle(IdleT, WaitN-1, Msgs) end end. analyse(Msgs) -> receive {test,From,TestFun} -> From ! {result,self(),TestFun(Msgs)}, analyse(Msgs) end. start_tracer(Trace,Expected) -> Pid = self(), FileCtrlPid = maps:get(file_ctrl_pid, logger_std_h:info(?MODULE)), dbg:tracer(process,{fun tracer/2,{Pid,Expected}}), dbg:p(whereis(?MODULE),[c]), dbg:p(FileCtrlPid,[c]), tpl(Trace), ok. tpl([{M,F,A}|Trace]) -> {ok,Match} = dbg:tpl(M,F,A,[]), case lists:keyfind(matched,1,Match) of {_,_,1} -> ok; _ -> dbg:stop_clear(), throw({skip,"Can't trace "++atom_to_list(M)++":"++ atom_to_list(F)++"/"++integer_to_list(A)}) end, tpl(Trace); tpl([]) -> ok. tracer({trace,_,call,{logger_std_h,handle_cast,[{Op,_}|_]}}, {Pid,[{Mod,Func,Op}|Expected]}) -> maybe_tracer_done(Pid,Expected,{Mod,Func,Op}); tracer({trace,_,call,{Mod=logger_std_h,Func=write_to_dev,[_,Data,_,_,_]}}, {Pid,[{Mod,Func,Data}|Expected]}) -> maybe_tracer_done(Pid,Expected,{Mod,Func,Data}); tracer({trace,_,call,{Mod,Func,_}}, {Pid,[{Mod,Func}|Expected]}) -> maybe_tracer_done(Pid,Expected,{Mod,Func}); tracer({trace,_,call,Call}, {Pid,Expected}) -> ct:log("Tracer got unexpected: ~p~nExpected: ~p~n",[Call,Expected]), Pid ! {tracer_got_unexpected,Call,Expected}, {Pid,Expected}. maybe_tracer_done(Pid,[]=Expected,Got) -> ct:log("Tracer got: ~p~n",[Got]), Pid ! {tracer_done,0}, {Pid,Expected}; maybe_tracer_done(Pid,[{no_more,T}]=Expected,Got) -> ct:log("Tracer got: ~p~n",[Got]), Pid ! {tracer_done,T}, {Pid,Expected}; maybe_tracer_done(Pid,Expected,Got) -> ct:log("Tracer got: ~p~n",[Got]), {Pid,Expected}. check_tracer(T) -> check_tracer(T,fun() -> ct:fail({timeout,tracer}) end). check_tracer(T,TimeoutFun) -> receive {tracer_done,Delay} -> %% Possibly wait Delay ms to check that no unexpected %% traces are received check_tracer(Delay,fun() -> ok end); {tracer_got_unexpected,Got,Expected} -> dbg:stop_clear(), ct:fail({tracer_got_unexpected,Got,Expected}) after T -> dbg:stop_clear(), TimeoutFun() end.