%%
%% %CopyrightBegin%
%%
%% Copyright Ericsson AB 2010. 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(dbg_SUITE).
%% Test functions
-export([all/1, big/1, tiny/1, simple/1, message/1, distributed/1,
ip_port/1, file_port/1, file_port2/1, file_port_schedfix/1,
ip_port_busy/1, wrap_port/1, wrap_port_time/1,
with_seq_trace/1, dead_suspend/1, local_trace/1,
saved_patterns/1]).
-export([init_per_testcase/2, fin_per_testcase/2]).
-export([tracee1/1, tracee2/1]).
-export([dummy/0, exported/1]).
-include("test_server.hrl").
-define(default_timeout, ?t:minutes(1)).
init_per_testcase(_Case, Config) ->
?line Dog=test_server:timetrap(?default_timeout),
[{watchdog, Dog}|Config].
fin_per_testcase(_Case, Config) ->
Dog=?config(watchdog, Config),
test_server:timetrap_cancel(Dog),
ok.
all(suite) -> [big, tiny, simple, message, distributed,
ip_port, file_port, file_port2, file_port_schedfix,
ip_port_busy, wrap_port, wrap_port_time,
with_seq_trace, dead_suspend, local_trace, saved_patterns].
big(suite) -> [];
big(doc) -> ["Rudimentary interface test"];
big(Config) when is_list(Config) ->
?line {ok,OldCurDir} = file:get_cwd(),
Datadir=?config(data_dir, Config),
Privdir=?config(priv_dir, Config),
?line ok=file:set_cwd(Privdir),
try
%% make sure dbg is stopped (and returns correctly)
?line ok = dbg:stop(),
%% compile test module and make sure it is loaded.
?line {ok,Mod} = compile:file(Datadir++"/dbg_test",[trace]),
?line code:purge(dbg_test),
?line {module, Mod}=code:load_file(dbg_test),
%% run/debug a named test function.
?line Pid = spawn_link(dbg_test, loop, [Config]),
?line true = register(dbg_test_loop, Pid),
?line {ok,_} = dbg:tracer(),
?line {ok,[{matched, _node, 1}]} = dbg:p(dbg_test_loop, [m,p,c]),
?line ok = dbg:c(dbg_test, test, [Config]),
?line ok = dbg:i(),
?line dbg_test_loop ! {dbg_test, stop},
unregister(dbg_test_loop),
?line ok = dbg:stop(),
%% run/debug a Pid.
?line Pid2=spawn_link(dbg_test,loop,[Config]),
?line {ok,_} = dbg:tracer(),
?line {ok,[{matched, _node, 1}]} = dbg:p(Pid2,[s,r,p]),
?line ok = dbg:c(dbg_test, test, [Config]),
?line ok = dbg:i(),
?line Pid2 ! {dbg_test, stop},
?line ok=file:set_cwd(OldCurDir)
after
?line dbg:stop()
end,
ok.
tiny(suite) -> [];
tiny(doc) -> ["Rudimentary interface test"];
tiny(Config) when is_list(Config) ->
?line {ok,OldCurDir} = file:get_cwd(),
Datadir=?config(data_dir, Config),
Privdir=?config(priv_dir, Config),
?line ok=file:set_cwd(Privdir),
try
%% compile test module and make sure it is loaded.
?line {ok, Mod} = compile:file(Datadir++"/dbg_test",[trace]),
?line code:purge(dbg_test),
?line {module, Mod}=code:load_file(dbg_test),
?line Pid=spawn_link(dbg_test,loop,[Config]),
if
is_pid(Pid) ->
?line dbg:tracer(),
?line {ok,[{matched, _node, 1}]} = dbg:p(Pid,[s,r,m,p,c]),
?line ok = dbg:c(dbg_test,test,[Config]),
?line ok = dbg:i(),
?line Pid ! {dbg_test, stop};
true ->
?line ok=file:set_cwd(OldCurDir),
?t:fail("Could not spawn external test process.~n"),
failure
end
after
?line ok = dbg:stop(),
?line ok = file:set_cwd(OldCurDir)
end,
ok.
simple(suite) ->
[];
simple(doc) ->
["Simple interface test with own handler"];
simple(Config) when is_list(Config) ->
try
?line start(),
?line dbg:p(self(),call),
?line dbg:tp(dbg,ltp,[]),
?line dbg:ltp(),
?line stop(),
?line S = self(),
?line [{trace,S,call,{dbg,ltp,[]}}] = flush()
after
?line dbg:stop()
end,
ok.
message(suite) ->
[];
message(doc) ->
["Simple interface test with pam code that appends a message"];
message(Config) when is_list(Config) ->
?line {ok, _} = start(),
try
?line {ok, [{matched, _node, 1}]} = dbg:p(self(),call),
?line {ok, X} = dbg:tp(dbg,ltp,[{'_',[],[{message, {self}}]}]),
?line {value, {saved, Saved}} = lists:keysearch(saved, 1, X),
?line {ok, Y} = dbg:tp(dbg,ln,Saved),
?line {value, {saved, Saved}} = lists:keysearch(saved, 1, Y),
?line ok = dbg:ltp(),
?line ok = dbg:ln()
after
?line stop()
end,
?line S = self(),
?line [{trace,S,call,{dbg,ltp,[]},S},
{trace,S,call,{dbg,ln,[]},S}] = flush(),
ok.
distributed(suite) ->
[];
distributed(doc) ->
["Simple test of distributed tracing"];
distributed(Config) when is_list(Config) ->
?line {ok, _} = start(),
?line Node = start_slave(),
try
?line RexPid = rpc:call(Node, erlang, whereis, [rex]),
?line RexPidList = pid_to_list(RexPid),
?line {ok, Node} = dbg:n(Node),
?line {ok, X} = dbg:p(all,call),
?line {value, {matched, Node, _}} = lists:keysearch(Node, 2, X),
?line {ok, Y} = dbg:p(RexPidList, s),
?line {value, {matched, Node, 1}} = lists:keysearch(Node, 2, Y),
?line {ok, Z} = dbg:tp(dbg,ltp,[]),
?line {value, {matched, Node, 1}} = lists:keysearch(Node, 2, Z),
?line dbg:cn(Node),
?line dbg:tp(dbg,ln,[]),
?line ok = rpc:call(Node, dbg, ltp, []),
?line ok = rpc:call(Node, dbg, ln, []),
?line ok = dbg:ln(),
?line S = self(),
?line {TraceSend, TraceCall} =
lists:partition(fun ({trace,RP,send,_,_}) when RP =:= RexPid -> true;
(_) -> false end,
flush()),
?line [_|_] = TraceSend,
?line [{trace,Pid,call,{dbg,ltp,[]}},
{trace,S,call,{dbg,ln,[]}}] = TraceCall,
?line Node = node(Pid),
%%
?line stop()
after
?line stop_slave(Node),
?line stop()
end,
ok.
local_trace(suite) ->
[];
local_trace(doc) ->
["Tests tracing of local function calls."];
local_trace(Config) when is_list(Config) ->
?line {ok, _} = start(),
try
?line S = self(),
?line %% Split "<X.Y.Z>" into {X, Y, Z}
?line "<"++L1 = L = pid_to_list(S),
?line NoDot = fun ($.) -> false; (_) -> true end,
?line {LX,"."++L2} = lists:splitwith(NoDot, L1),
?line {LY,"."++L3} = lists:splitwith(NoDot, L2),
?line ">"++L4 = lists:reverse(L3),
?line LZ = lists:reverse(L4),
?line X = 0 = list_to_integer(LX),
?line Y = list_to_integer(LY),
?line Z = list_to_integer(LZ),
?line XYZ = {X, Y, Z},
?line io:format("Self = ~w = ~w~n", [S,XYZ]),
?line {ok, [{matched, _node, 1}]} = dbg:p(S,call),
?line {ok, [{matched, _node, 1}]} = dbg:p(XYZ,call),
if Z =:= 0 ->
?line {ok, [{matched, _node, 1}]} = dbg:p(Y,call);
true -> ok
end,
?line {ok, [{matched, _node, 1}]} = dbg:p(L,call),
?line {ok, _} = dbg:tpl(?MODULE,not_exported,[]),
?line 4 = not_exported(2),
?line [{trace,S,call,{?MODULE,not_exported,[2]}}] = flush(),
?line {ok, _} = dbg:tp(?MODULE,exported,[]),
?line 4 = ?MODULE:exported(2),
?line [{trace,S,call,{?MODULE,exported,[2]}},
{trace,S,call,{?MODULE,not_exported,[2]}}] = flush(),
?line {ok, _} = dbg:ctpl(?MODULE),
?line 4 = ?MODULE:exported(2),
?line [{trace,S,call,{?MODULE,exported,[2]}}] = flush(),
?line {ok, _} = dbg:tpl(?MODULE,not_exported,[]),
?line {ok, _} = dbg:ctp(?MODULE),
?line 4 = ?MODULE:exported(2),
?line [] = flush(),
?line {ok, _} = dbg:tpl(?MODULE,not_exported,x),
?line catch ?MODULE:exported(x),
?line [{trace,S,call,{dbg_SUITE,not_exported,[x]}},
{trace,S,exception_from,
{dbg_SUITE,not_exported,1},
{error,badarith}}] = flush()
after
?line stop()
end,
ok.
saved_patterns(suite) ->
[];
saved_patterns(doc) ->
["Tests saving of match_spec's."];
saved_patterns(Config) when is_list(Config) ->
?line dbg:stop(),
?line {ok,[{saved,1}]} =
dbg:tp(dbg,ctp,1,[{'_',[],[{message, blahonga}]}]),
?line {ok,[{saved,2}]} =
dbg:tp(dbg,ctp,1,[{['_'],[],[{message, blahonga}]}]),
?line Privdir=?config(priv_dir, Config),
?line file:make_dir(Privdir),
?line File = filename:join([Privdir, "blahonga.ms"]),
?line dbg:wtp(File),
?line dbg:stop(),
?line dbg:ctp('_','_','_'),
?line {ok, _} = start(),
try
?line dbg:rtp(File),
?line {ok,[{matched,_node,1},{saved,1}]} = dbg:tp(dbg,ltp,0,1),
?line {ok, [{matched, _node, 1}]} = dbg:p(self(),call),
?line dbg:ltp(),
?line S = self(),
?line [{trace,S,call,{dbg,ltp,[]},blahonga}] = flush()
after
?line stop()
end,
ok.
not_exported(N) ->
N * 2.
exported(N) ->
not_exported(N).
ip_port(suite) ->
[];
ip_port(doc) ->
["Test tracing to IP port"];
ip_port(Config) when is_list(Config) ->
?line stop(),
?line Port = dbg:trace_port(ip, 0),
?line {ok, _} = dbg:tracer(port, Port),
try
?line {ok, [{matched, _node, 1}]} = dbg:p(self(),call),
?line {ok, X} = dbg:tp(dbg, ltp,[{'_',[],[{message, {self}}]}]),
?line {value, {saved, _Saved}} = lists:keysearch(saved, 1, X),
?line {ok, Y} = dbg:tp(dbg, ln, [{'_',[],[{message, hej}]}]),
?line {value, {saved, _}} = lists:keysearch(saved, 1, Y),
?line ok = dbg:ltp(),
?line ok = dbg:ln(),
?line {ok, IpPort} = dbg:trace_port_control(get_listen_port),
?line io:format("IpPort = ~p~n", [IpPort]),
?line dbg:trace_client(ip, IpPort, {fun myhandler/2, self()}),
?line S = self(),
?line [{trace,S,call,{dbg,ltp,[]},S},
{trace,S,call,{dbg,ln,[]},hej}] = flush()
after
?line stop()
end,
ok.
ip_port_busy(suite) ->
[];
ip_port_busy(doc) ->
["Test that the dbg server does not hang if the tracer don't start ",
"(OTP-3592)"];
ip_port_busy(Config) when is_list(Config) ->
?line stop(),
?line Tracer = dbg:trace_port(ip, 4745),
?line Port = Tracer(),
?line {error, Reason} = dbg:tracer(port, Tracer),
try
?line io:format("Error reason = ~p~n", [Reason]),
?line true = port_close(Port)
after
?line dbg:stop()
end,
?line ok.
file_port(suite) ->
[];
file_port(doc) ->
["Test tracing to file port (simple)"];
file_port(Config) when is_list(Config) ->
?line stop(),
?line {A,B,C} = erlang:now(),
?line FTMP = atom_to_list(?MODULE) ++ integer_to_list(A) ++ "-" ++
integer_to_list(B) ++ "-" ++ integer_to_list(C),
?line FName = filename:join([?config(data_dir, Config), FTMP]),
?line Port = dbg:trace_port(file, FName),
?line {ok, _} = dbg:tracer(port, Port),
try
?line {ok, [{matched, _node, 1}]} = dbg:p(self(),call),
?line {ok, X} = dbg:tp(dbg, ltp,[{'_',[],[{message, {self}}]}]),
?line {value, {saved, _Saved}} = lists:keysearch(saved, 1, X),
?line {ok, Y} = dbg:tp(dbg, ln, [{'_',[],[{message, hej}]}]),
?line {value, {saved, _}} = lists:keysearch(saved, 1, Y),
?line ok = dbg:ltp(),
?line ok = dbg:ln(),
?line stop(),
?line dbg:trace_client(file, FName, {fun myhandler/2, self()}),
?line S = self(),
?line [{trace,S,call,{dbg,ltp,[]},S},
{trace,S,call,{dbg,ln,[]},hej},
end_of_trace] = flush()
after
?line stop(),
?line file:delete(FName)
end,
ok.
file_port2(suite) ->
[];
file_port2(doc) ->
["Test tracing to file port with 'follow_file'"];
file_port2(Config) when is_list(Config) ->
case os:type() of
vxworks ->
{skipped, "VxWorks NFS cache ruins it all."};
_ ->
?line stop(),
?line {A,B,C} = erlang:now(),
?line FTMP = atom_to_list(?MODULE) ++ integer_to_list(A) ++
"-" ++ integer_to_list(B) ++ "-" ++ integer_to_list(C),
?line FName = filename:join([?config(data_dir, Config), FTMP]),
%% Ok, lets try with flush and follow_file, not a chance on VxWorks
%% with NFS caching...
?line Port2 = dbg:trace_port(file, FName),
?line {ok, _} = dbg:tracer(port, Port2),
try
?line {ok, [{matched, _node, 1}]} = dbg:p(self(),call),
?line {ok, _} = dbg:tp(dbg, ltp,[{'_',[],[{message, {self}}]}]),
?line {ok, _} = dbg:tp(dbg, ln, [{'_',[],[{message, hej}]}]),
?line ok = dbg:ltp(),
?line ok = dbg:flush_trace_port(),
?line dbg:trace_client(follow_file, FName,
{fun myhandler/2, self()}),
?line S = self(),
?line [{trace,S,call,{dbg,ltp,[]},S}] = flush(),
?line ok = dbg:ln(),
?line ok = dbg:flush_trace_port(),
?line receive after 1000 -> ok end, %% Polls every second...
?line [{trace,S,call,{dbg,ln,[]},hej}] = flush(),
?line stop(),
?line [] = flush()
after
?line stop(),
?line file:delete(FName)
end,
ok
end.
file_port_schedfix(suite) ->
[];
file_port_schedfix(doc) ->
["Test that the scheduling timestamp fix for trace flag 'running' works."];
file_port_schedfix(Config) when is_list(Config) ->
?line case (catch erlang:system_info(smp_support)) of
true ->
{skip, "No schedule fix on SMP"};
_ ->
try
file_port_schedfix1(Config)
after
dbg:stop()
end
end.
file_port_schedfix1(Config) when is_list(Config) ->
?line stop(),
?line {A,B,C} = erlang:now(),
?line FTMP = atom_to_list(?MODULE) ++ integer_to_list(A) ++
"-" ++ integer_to_list(B) ++ "-" ++ integer_to_list(C),
?line FName = filename:join([?config(data_dir, Config), FTMP]),
%%
?line Port = dbg:trace_port(file, {FName, wrap, ".wraplog", 8*1024, 4}),
?line {ok, _} = dbg:tracer(port, Port),
?line {ok,[{matched,_node,0}]} = dbg:p(new,[running,procs,send,timestamp]),
%%
%% Generate the trace data
%%
%% This starts 3 processes that sends a message to each other in a ring,
%% 4 laps. Prior to sending the message to the next in the ring, each
%% process send 8 messages to itself, just to generate some trace data,
%% and to lower the possibility that the trace log wraps just after
%% a schedule out message (which would not burden any process and hence
%% not show up in the result)
%%
%% The wrap file trace is used because it burns a lot of time when the
%% driver swaps files, a lot more than the regular file trace. The test
%% case is dimensioned so that the log fills two files and just starts
%% on the third (out of four wrap files). This gives two file swaps,
%% and there are three processes, so one process will NOT be burdened.
%% The criterion for trace success is then that the max process
%% execution time must not be more than twice the min process
%% execution time. Wallclock. A normal result is about 10 times more
%% without schedule in - schedule out compensation (OTP-3938).
%%
?line ok = token_volleyball(3, 4, 8),
%%
?line {ok,[{matched,_,_}]} = dbg:p(all, [clear]),
?line stop(),
% Some debug code to run on all platforms, for finding the fault on genny
% Dont touch please /PaN
?line io:format("Trace dump by PaN BEGIN~n"),
?line dbg:trace_client(file,{FName, wrap, ".wraplog"},{fun(end_of_trace,Pid)-> Pid ! done; (Mesg,Pid) -> io:format("~w~n",[Mesg]),Pid end,self()}),
receive done -> ok end,
?line io:format("Trace dump by PaN END~n"),
%%
%% Get the trace result
%%
?line Tag = make_ref(),
?line dbg:trace_client(file, {FName, wrap, ".wraplog"},
{fun schedstat_handler/2, {self(), Tag, []}}),
?line Result =
receive
{Tag, D} ->
lists:map(
fun({Pid, {A1, B1, C1}}) ->
{Pid, C1/1000000 + B1 + A1*1000000}
end,
D)
end,
?line ok = io:format("Result=~p", [Result]),
% erlang:display({?MODULE, ?LINE, Result}),
%%
%% Analyze the result
%%
?line {Min, Max} =
lists:foldl(
fun({_Pid, M}, {Mi, Ma}) ->
{if M < Mi -> M; true -> Mi end,
if M > Ma -> M; true -> Ma end}
end,
{void, 0},
Result),
% More PaN debug
?line io:format("Min = ~f, Max = ~f~n",[Min,Max]),
%%
%% Cleanup
%%
?line ToBeDeleted = filelib:wildcard(FName++"*"++".wraplog"),
?line lists:map({file, delete}, ToBeDeleted),
% io:format("ToBeDeleted=~p", [ToBeDeleted]),
%%
%% Present the result
%%
P = (Max / Min - 1) * 100,
BottomLine = lists:flatten(io_lib:format("~.2f %", [P])),
if P > 100 ->
Reason = {BottomLine, '>', "100%"},
erlang:display({file_port_schedfix, fail, Reason}),
test_server:fail(Reason);
true ->
{comment, BottomLine}
end.
wrap_port(suite) ->
[];
wrap_port(doc) ->
["Test tracing to wrapping file port"];
wrap_port(Config) when is_list(Config) ->
?line Self = self(),
?line stop(),
?line {A,B,C} = erlang:now(),
?line FTMP = atom_to_list(?MODULE) ++ integer_to_list(A) ++ "-" ++
integer_to_list(B) ++ "-" ++ integer_to_list(C) ++ "-",
?line FName = filename:join([?config(data_dir, Config), FTMP]),
?line FNameWildcard = FName++"*"++".trace",
%% WrapSize=0 and WrapCnt=11 will force the trace to wrap after
%% every trace message, and to contain only the last 10 entries
%% after trace stop since the last file will be empty waiting
%% for its first trace message.
?line WrapSize = 0,
?line WrapCnt = 11,
?line WrapFilesSpec = {FName, wrap, ".trace", WrapSize, WrapCnt},
?line wrap_port_init(WrapFilesSpec),
%% The number of iterations, N, is tested to place wrap the log,
%% giving a gap in the filename sequence at index 3.
%% This should be a difficult case for
%% the trace_client file sorting functionality.
N = 7,
?line lists:foreach(
fun(Cnt) ->
?MODULE:tracee1(Cnt),
?MODULE:tracee2(Cnt)
end,
lists:seq(1, N)),
?line stop(),
try
?line Files1 = filelib:wildcard(FNameWildcard),
?line io:format("~p~n", [Files1]),
?line Tc1 = dbg:trace_client(file, WrapFilesSpec,
{fun myhandler/2, {wait_for_go,Self}}),
?line Tref1 = erlang:monitor(process, Tc1),
Tc1 ! {go,Self},
?line [{'DOWN',Tref1,_,_,normal},
end_of_trace
|Result] = lists:reverse(flush()),
?line M = N - (WrapCnt-1) div 2,
?line M = wrap_port_result(Result, Self, N),
%%
%% Start a new wrap log with the same name to verify that
%% all files are cleared at wrap log start. Only produce
%% two trace messages to also place the gap at index 3,
%% so the trace log will be misinterpreted.
%%
?line wrap_port_init(WrapFilesSpec),
?line Files2 = filelib:wildcard(FNameWildcard),
?line io:format("~p~n", [Files2]),
?line -1 = ?MODULE:tracee1(-1),
?line -1 = ?MODULE:tracee2(-1),
?line stop(),
?line Files = filelib:wildcard(FNameWildcard),
?line io:format("~p~n", [Files]),
?line Tc2 = dbg:trace_client(file, WrapFilesSpec,
{fun myhandler/2, {wait_for_go,Self}}),
?line Tref2 = erlang:monitor(process, Tc2),
Tc2 ! {go,Self},
?line [{trace,Self,call,{?MODULE,tracee1,[-1]},Self},
{trace,Self,call,{?MODULE,tracee2,[-1]},hej},
end_of_trace,
{'DOWN',Tref2,_,_,normal}] = flush(),
%%
?line lists:map(fun(F) -> file:delete(F) end, Files)
after
?line stop()
end,
ok.
wrap_port_init(WrapFilesSpec) ->
?line Port = dbg:trace_port(file, WrapFilesSpec),
?line {ok, _} = dbg:tracer(port, Port),
?line {ok, [{matched, _node, 1}]} = dbg:p(self(),call),
?line {ok, X} = dbg:tp(?MODULE, tracee1,[{'_',[],[{message, {self}}]}]),
?line {value, {saved, _Saved}} = lists:keysearch(saved, 1, X),
?line {ok, Y} = dbg:tp(?MODULE, tracee2, [{'_',[],[{message, hej}]}]),
?line {value, {saved, _}} = lists:keysearch(saved, 1, Y),
ok.
tracee1(X) ->
X.
tracee2(X) ->
X.
wrap_port_result([], _S, M) ->
M;
wrap_port_result([{trace, S, call, {?MODULE, tracee2, [M]}, hej},
{trace, S, call, {?MODULE, tracee1, [M]}, S} | Tail],
S,
M) ->
wrap_port_result(Tail, S, M-1).
wrap_port_time(suite) ->
[];
wrap_port_time(doc) ->
["Test tracing to time limited wrapping file port"];
wrap_port_time(Config) when is_list(Config) ->
?line stop(),
?line {A,B,C} = erlang:now(),
?line FTMP = atom_to_list(?MODULE) ++ integer_to_list(A) ++ "-" ++
integer_to_list(B) ++ "-" ++ integer_to_list(C) ++ "-",
?line FName = filename:join([?config(data_dir, Config), FTMP]),
%% WrapTime=2 and WrapCnt=4 will force the trace to wrap after
%% every 2 seconds, and to contain between 3*2 and 4*2 seconds
%% of trace entries.
?line WrapFilesSpec = {FName, wrap, ".trace", {time, 2000}, 4},
?line Port = dbg:trace_port(file, WrapFilesSpec),
?line {ok, _} = dbg:tracer(port, Port),
try
?line {ok, [{matched, _node, 1}]} = dbg:p(self(),call),
?line {ok, X} = dbg:tp(?MODULE, tracee1,[{'_',[],[{message, {self}}]}]),
?line {value, {saved, _Saved1}} = lists:keysearch(saved, 1, X),
?line {ok, Y} = dbg:tp(?MODULE, tracee2, [{'_',[],[{message, hej}]}]),
?line {value, {saved, _Saved2}} = lists:keysearch(saved, 1, Y),
%% The delays in the iterations places two trace messages in each
%% trace file, but the last which is empty waiting for its first
%% trace message. The number of iterations is chosen so that
%% one trace file has been wasted, and therefore the first pair
%% of trace messages.
?line lists:foreach(
fun(Cnt) ->
receive after 1000 -> ok end,
?MODULE:tracee1(Cnt),
?MODULE:tracee2(Cnt),
receive after 1100 -> ok end
end,
lists:seq(1, 4)),
?line stop(),
?line Files = filelib:wildcard(FName ++ "*" ++ ".trace"),
?line io:format("~p~n", [Files]),
?line dbg:trace_client(file, WrapFilesSpec, {fun myhandler/2, self()}),
?line S = self(),
?line [{trace, S, call, {?MODULE, tracee1, [2]}, S},
{trace, S, call, {?MODULE, tracee2, [2]}, hej},
{trace, S, call, {?MODULE, tracee1, [3]}, S},
{trace, S, call, {?MODULE, tracee2, [3]}, hej},
{trace, S, call, {?MODULE, tracee1, [4]}, S},
{trace, S, call, {?MODULE, tracee2, [4]}, hej},
end_of_trace] = flush(),
?line lists:map(fun(F) -> file:delete(F) end, Files)
after
?line stop()
end,
ok.
with_seq_trace(suite) ->
[];
with_seq_trace(doc) ->
["Test ordinary tracing combined with seq_trace"];
with_seq_trace(Config) when is_list(Config) ->
try
?line {ok, Server} = start(),
?line {ok, Tracer} = dbg:get_tracer(),
?line {ok, X} = dbg:tp(dbg, get_tracer, [{[],[],
[{set_seq_token, send, true}]}]),
?line {value, {saved, _}} = lists:keysearch(saved, 1, X),
?line {ok, [{matched, _node, 1}]} = dbg:p(self(),call),
?line seq_trace:set_system_tracer(Tracer),
?line dbg:get_tracer(),
receive
after 1 ->
ok
end,
?line S = self(),
?line ThisNode = node(),
?line [{trace,S,call,{dbg,get_tracer,[]}},
{seq_trace,0,{send,_,S,Server,{S,{get_tracer,ThisNode}}}},
{seq_trace,0,{send,_,Server,S,{dbg,{ok,Tracer}}}}] =
flush()
after
?line stop()
end,
ok.
dead_suspend(suite) ->
[];
dead_suspend(doc) ->
["Test that trace messages concerning a now dead process does "
"not crash dbg."];
dead_suspend(Config) when is_list(Config) ->
?line start(),
try
survived = run_dead_suspend()
after
?line stop()
end.
run_dead_suspend() ->
dbg:p(new, call),
dbg:tp(?MODULE, dummy, []),
spawn(?MODULE, dummy, []),
spawn(?MODULE, dummy, []),
spawn(?MODULE, dummy, []),
spawn(?MODULE, dummy, []),
spawn(?MODULE, dummy, []),
receive after 1000 -> ok end,
case whereis(dbg) of
undefined ->
died;
_ ->
survived
end.
dummy() ->
ok.
%%
%% Support functions
%%
start_slave() ->
{A, B, C} = now(),
Name = "asdkxlkmd" ++ integer_to_list(A+B+C),
{ok, Node} = test_server:start_node(Name,slave,[]),
ok = wait_node(Node, 15),
Node.
stop_slave(Node) ->
test_server:stop_node(Node).
wait_node(_,0) ->
no;
wait_node(Node, N) ->
case net_adm:ping(Node) of
pong ->
ok;
pang ->
receive
after 1000 ->
ok
end,
wait_node(Node, N - 1)
end.
myhandler(Message, {wait_for_go,Pid}) ->
receive
{go,Pid} ->
myhandler(Message, Pid)
end;
myhandler(Message, Relay) ->
Relay ! Message,
case Message of
end_of_trace ->
ok;
_ ->
Relay
end.
flush() ->
flush([]).
flush(Acc) ->
receive
X ->
flush(Acc ++ [X])
after 1000 ->
Acc
end.
start() ->
stop(),
dbg:tracer(process, {fun myhandler/2, self()}).
stop() ->
dbg:stop().
schedstat_handler(TraceMsg, {Parent, Tag, Data} = State) ->
case TraceMsg of
{trace_ts, Pid, in, _, Ts} ->
NewData =
case lists:keysearch(Pid, 1, Data) of
{value, {Pid, Acc}} ->
[{Pid, Acc, Ts} | lists:keydelete(Pid, 1, Data)];
false ->
[{Pid, {0, 0, 0}, Ts} | Data];
Other ->
exit(Parent, {?MODULE, ?LINE, Other}),
erlang:display({?MODULE, ?LINE, Other}),
Data
end,
{Parent, Tag, NewData};
{trace_ts, Pid, out, _, {A3, B3, C3}} ->
NewData =
case lists:keysearch(Pid, 1, Data) of
{value, {Pid, {A1, B1, C1}, {A2, B2, C2}}} ->
[{Pid, {A3-A2+A1, B3-B2+B1, C3-C2+C1}} |
lists:keydelete(Pid, 1, Data)];
Other ->
exit(Parent, {?MODULE, ?LINE, Other}),
erlang:display({?MODULE, ?LINE, Other}),
Data
end,
{Parent, Tag, NewData};
{trace_ts, Pid, exit, normal, {A3, B3, C3}} ->
NewData =
case lists:keysearch(Pid, 1, Data) of
{value, {Pid, {A1, B1, C1}, {A2, B2, C2}}} ->
[{Pid, {A3-A2+A1, B3-B2+B1, C3-C2+C1}} |
lists:keydelete(Pid, 1, Data)];
{value, {Pid, _Acc}} ->
Data;
false ->
[{Pid, {0, 0, 0}} | Data];
Other ->
exit(Parent, {?MODULE, ?LINE, Other}),
erlang:display({?MODULE, ?LINE, Other}),
Data
end,
{Parent, Tag, NewData};
{trace_ts, _Pid, send, _Msg, _OtherPid, _Ts} ->
State;
end_of_trace ->
Parent ! {Tag, Data},
State
end.
pass_token(Token, Next, Loops) ->
receive
{Token, 1} = Msg ->
sendloop(Loops),
Next ! Msg;
{Token, _Cnt} = Msg->
sendloop(Loops),
Next ! Msg,
pass_token(Token, Next, Loops)
end.
pass_token(Token, Final, Cnt, Loops) ->
receive
{Token, start, Next} ->
sendloop(Loops),
Msg = {Token, Cnt},
Next ! Msg,
pass_token(Token, Final, Next, Cnt, Loops)
end.
pass_token(Token, Final, Next, Cnt, Loops) ->
receive
{Token, 1} ->
sendloop(Loops),
Msg = {Token, done},
Final ! Msg;
{Token, Cnt} ->
sendloop(Loops),
NextCnt = Cnt-1,
Msg = {Token, NextCnt},
Next ! Msg,
pass_token(Token, Final, Next, NextCnt, Loops)
end.
sendloop(Loops) ->
sendloop(make_ref(), Loops).
sendloop(_Tag, 0) ->
ok;
sendloop(Tag, Loops) ->
self() ! {Tag, Loops},
receive {Tag, Loops} -> ok end,
sendloop(Tag, Loops-1).
token_volleyball(N, Cnt, Loops)
when is_integer(N), N >= 1, is_integer(Cnt), Cnt >= 1,
is_integer(Loops), Loops >= 0 ->
Self = self(),
Token = make_ref(),
Last = spawn_link(fun() -> pass_token(Token, Self, Cnt, Loops) end),
First = token_volleyball(Token, Last, N-1, Loops),
Last ! {Token, start, First},
receive {Token, done} -> ok end.
token_volleyball(Token, Next, 1, Loops) ->
spawn_link(fun() -> pass_token(Token, Next, Loops) end);
token_volleyball(Token, Next, N, Loops) ->
Pid = spawn_link(fun() -> pass_token(Token, Next, Loops) end),
token_volleyball(Token, Pid, N-1, Loops).
