%%
%% %CopyrightBegin%
%%
%% Copyright Ericsson AB 2010-2014. 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(dirty_nif_SUITE).
%%-define(line_trace,true).
-define(CHECK(Exp,Got), check(Exp,Got,?LINE)).
%%-define(CHECK(Exp,Got), Exp = Got).
-include_lib("common_test/include/ct.hrl").
-export([all/0, suite/0,
init_per_suite/1, end_per_suite/1,
init_per_testcase/2, end_per_testcase/2,
dirty_nif/1, dirty_nif_send/1,
dirty_nif_exception/1, call_dirty_nif_exception/1,
dirty_scheduler_exit/1, dirty_call_while_terminated/1,
dirty_heap_access/1, dirty_process_info/1,
dirty_process_register/1, dirty_process_trace/1]).
-define(nif_stub,nif_stub_error(?LINE)).
suite() -> [{ct_hooks,[ts_install_cth]}].
all() ->
[dirty_nif,
dirty_nif_send,
dirty_nif_exception,
dirty_scheduler_exit,
dirty_call_while_terminated,
dirty_heap_access,
dirty_process_info,
dirty_process_register,
dirty_process_trace].
init_per_suite(Config) ->
try erlang:system_info(dirty_cpu_schedulers) of
N when is_integer(N), N > 0 ->
case lib_loaded() of
false ->
ok = erlang:load_nif(
filename:join(?config(data_dir, Config),
"dirty_nif_SUITE"), []);
true ->
ok
end,
Config
catch _:_ ->
{skipped, "No dirty scheduler support"}
end.
end_per_suite(_Config) ->
ok.
init_per_testcase(Case, Config) ->
[{testcase, Case} | Config].
end_per_testcase(_Case, _Config) ->
ok.
dirty_nif(Config) when is_list(Config) ->
Val1 = 42,
Val2 = "Erlang",
Val3 = list_to_binary([Val2, 0]),
{Val1, Val2, Val3} = call_dirty_nif(Val1, Val2, Val3),
LargeArray = lists:duplicate(1000, ok),
LargeArray = call_dirty_nif_zero_args(),
ok.
dirty_nif_send(Config) when is_list(Config) ->
Parent = self(),
Pid = spawn_link(fun() ->
Self = self(),
{ok, Self} = receive_any(),
Parent ! {ok, Self}
end),
{ok, Pid} = send_from_dirty_nif(Pid),
{ok, Pid} = receive_any(),
ok.
dirty_nif_exception(Config) when is_list(Config) ->
try
%% this checks that the expected exception occurs when the
%% dirty NIF returns the result of enif_make_badarg
%% directly
call_dirty_nif_exception(1),
ct:fail(expected_badarg)
catch
error:badarg ->
[{?MODULE,call_dirty_nif_exception,[1],_}|_] =
erlang:get_stacktrace(),
ok
end,
try
%% this checks that the expected exception occurs when the
%% dirty NIF calls enif_make_badarg at some point but then
%% returns a value that isn't an exception
call_dirty_nif_exception(0),
ct:fail(expected_badarg)
catch
error:badarg ->
[{?MODULE,call_dirty_nif_exception,[0],_}|_] =
erlang:get_stacktrace(),
ok
end,
%% this checks that a dirty NIF can raise various terms as
%% exceptions
ok = nif_raise_exceptions(call_dirty_nif_exception).
nif_raise_exceptions(NifFunc) ->
ExcTerms = [{error, test}, "a string", <<"a binary">>,
42, [1,2,3,4,5], [{p,1},{p,2},{p,3}]],
lists:foldl(fun(Term, ok) ->
try
erlang:apply(?MODULE,NifFunc,[Term]),
ct:fail({expected,Term})
catch
error:Term ->
[{?MODULE,NifFunc,[Term],_}|_] = erlang:get_stacktrace(),
ok
end
end, ok, ExcTerms).
dirty_scheduler_exit(Config) when is_list(Config) ->
{ok, Node} = start_node(Config, "+SDio 1"),
Path = proplists:get_value(data_dir, Config),
NifLib = filename:join(Path, atom_to_list(?MODULE)),
[ok] = mcall(Node,
[fun() ->
ok = erlang:load_nif(NifLib, []),
Start = erlang:monotonic_time(milli_seconds),
ok = test_dirty_scheduler_exit(),
End = erlang:monotonic_time(milli_seconds),
io:format("Time=~p ms~n", [End-Start]),
ok
end]),
stop_node(Node),
ok.
test_dirty_scheduler_exit() ->
process_flag(trap_exit,true),
test_dse(10,[]).
test_dse(0,Pids) ->
timer:sleep(100),
kill_dse(Pids,[]);
test_dse(N,Pids) ->
Pid = spawn_link(fun dirty_sleeper/0),
test_dse(N-1,[Pid|Pids]).
kill_dse([],Killed) ->
wait_dse(Killed);
kill_dse([Pid|Pids],AlreadyKilled) ->
exit(Pid,kill),
kill_dse(Pids,[Pid|AlreadyKilled]).
wait_dse([]) ->
ok;
wait_dse([Pid|Pids]) ->
receive
{'EXIT',Pid,Reason} ->
killed = Reason
end,
wait_dse(Pids).
dirty_call_while_terminated(Config) when is_list(Config) ->
Me = self(),
Bin = list_to_binary(lists:duplicate(4711, $r)),
{value, {BinAddr, 4711, 1}} = lists:keysearch(4711, 2,
element(2,
process_info(self(),
binary))),
{Dirty, DM} = spawn_opt(fun () ->
dirty_call_while_terminated_nif(Me),
blipp:blupp(Bin)
end,
[monitor,link]),
receive {dirty_alive, _Pid} -> ok end,
{value, {BinAddr, 4711, 2}} = lists:keysearch(4711, 2,
element(2,
process_info(self(),
binary))),
Reason = die_dirty_process,
OT = process_flag(trap_exit, true),
exit(Dirty, Reason),
receive
{'DOWN', DM, process, Dirty, R0} ->
R0 = Reason
end,
receive
{'EXIT', Dirty, R1} ->
R1 = Reason
end,
undefined = process_info(Dirty),
undefined = process_info(Dirty, status),
false = erlang:is_process_alive(Dirty),
false = lists:member(Dirty, processes()),
%% Binary still refered by Dirty process not yet cleaned up
%% since the dirty nif has not yet returned...
{value, {BinAddr, 4711, 2}} = lists:keysearch(4711, 2,
element(2,
process_info(self(),
binary))),
receive after 2000 -> ok end,
receive
Msg ->
ct:fail({unexpected_message, Msg})
after
0 ->
ok
end,
{value, {BinAddr, 4711, 1}} = lists:keysearch(4711, 2,
element(2,
process_info(self(),
binary))),
process_flag(trap_exit, OT),
ok.
dirty_heap_access(Config) when is_list(Config) ->
{ok, Node} = start_node(Config),
Me = self(),
RGL = rpc:call(Node,erlang,whereis,[init]),
Ref = rpc:call(Node,erlang,make_ref,[]),
Dirty = spawn_link(fun () ->
Res = dirty_heap_access_nif(Ref),
garbage_collect(),
Me ! {self(), Res},
receive after infinity -> ok end
end),
{N, R} = access_dirty_heap(Dirty, RGL, 0, 0),
receive
{_Pid, Res} ->
1000 = length(Res),
lists:foreach(fun (X) -> Ref = X end, Res)
end,
unlink(Dirty),
exit(Dirty, kill),
stop_node(Node),
{comment, integer_to_list(N) ++ " GL change loops; "
++ integer_to_list(R) ++ " while running dirty"}.
access_dirty_heap(Dirty, RGL, N, R) ->
case process_info(Dirty, status) of
{status, waiting} ->
{N, R};
{status, Status} ->
{group_leader, GL} = process_info(Dirty, group_leader),
true = group_leader(RGL, Dirty),
{group_leader, RGL} = process_info(Dirty, group_leader),
true = group_leader(GL, Dirty),
{group_leader, GL} = process_info(Dirty, group_leader),
access_dirty_heap(Dirty, RGL, N+1, case Status of
running ->
R+1;
_ ->
R
end)
end.
%% These tests verify that processes that access a process executing a
%% dirty NIF where the main lock is needed for that access do not get
%% blocked. Each test passes its pid to dirty_sleeper, which sends a
%% 'ready' message when it's running on a dirty scheduler and just before
%% it starts a 6 second sleep. When it receives the message, it verifies
%% that access to the dirty process is as it expects. After the dirty
%% process finishes its 6 second sleep but before it returns from the dirty
%% scheduler, it sends a 'done' message. If the tester already received
%% that message, the test fails because it means attempting to access the
%% dirty process waited for that process to return to a regular scheduler,
%% so verify that we haven't received that message, and also verify that
%% the dirty process is still alive immediately after accessing it.
dirty_process_info(Config) when is_list(Config) ->
access_dirty_process(
Config,
fun() -> ok end,
fun(NifPid) ->
PI = process_info(NifPid),
{current_function,{?MODULE,dirty_sleeper,1}} =
lists:keyfind(current_function, 1, PI),
ok
end,
fun(_) -> ok end).
dirty_process_register(Config) when is_list(Config) ->
access_dirty_process(
Config,
fun() -> ok end,
fun(NifPid) ->
register(test_dirty_process_register, NifPid),
NifPid = whereis(test_dirty_process_register),
unregister(test_dirty_process_register),
false = lists:member(test_dirty_process_register,
registered()),
ok
end,
fun(_) -> ok end).
dirty_process_trace(Config) when is_list(Config) ->
access_dirty_process(
Config,
fun() ->
erlang:trace_pattern({?MODULE,dirty_sleeper,1},
[{'_',[],[{return_trace}]}],
[local,meta]),
ok
end,
fun(NifPid) ->
erlang:trace(NifPid, true, [call,timestamp]),
ok
end,
fun(NifPid) ->
receive
done ->
receive
{trace_ts,NifPid,call,{?MODULE,dirty_sleeper,_},_} ->
ok
after
0 ->
error(missing_trace_call_message)
end,
receive
{trace_ts,NifPid,return_from,{?MODULE,dirty_sleeper,1},
ok,_} ->
ok
after
100 ->
error(missing_trace_return_message)
end
after
6500 ->
error(missing_done_message)
end,
ok
end).
%%
%% Internal...
%%
access_dirty_process(Config, Start, Test, Finish) ->
{ok, Node} = start_node(Config, ""),
[ok] = mcall(Node,
[fun() ->
Path = ?config(data_dir, Config),
Lib = atom_to_list(?MODULE),
ok = erlang:load_nif(filename:join(Path,Lib), []),
ok = test_dirty_process_access(Start, Test, Finish)
end]),
stop_node(Node),
ok.
test_dirty_process_access(Start, Test, Finish) ->
ok = Start(),
Self = self(),
NifPid = spawn_link(fun() ->
ok = dirty_sleeper(Self)
end),
ok = receive
ready ->
ok = Test(NifPid),
receive
done ->
error(dirty_process_info_blocked)
after
0 ->
true = erlang:is_process_alive(NifPid),
ok
end
after
3000 ->
error(timeout)
end,
ok = Finish(NifPid).
receive_any() ->
receive M -> M end.
start_node(Config) ->
start_node(Config, "").
start_node(Config, Args) when is_list(Config) ->
Pa = filename:dirname(code:which(?MODULE)),
Name = list_to_atom(atom_to_list(?MODULE)
++ "-"
++ atom_to_list(proplists:get_value(testcase, Config))
++ "-"
++ integer_to_list(erlang:system_time(seconds))
++ "-"
++ integer_to_list(erlang:unique_integer([positive]))),
test_server:start_node(Name, slave, [{args, "-pa "++Pa++" "++Args}]).
stop_node(Node) ->
test_server:stop_node(Node).
mcall(Node, Funs) ->
Parent = self(),
Refs = lists:map(fun (Fun) ->
Ref = make_ref(),
spawn_link(Node,
fun () ->
Res = Fun(),
unlink(Parent),
Parent ! {Ref, Res}
end),
Ref
end, Funs),
lists:map(fun (Ref) ->
receive
{Ref, Res} ->
Res
end
end, Refs).
%% The NIFs:
lib_loaded() -> false.
call_dirty_nif(_,_,_) -> ?nif_stub.
send_from_dirty_nif(_) -> ?nif_stub.
call_dirty_nif_exception(_) -> ?nif_stub.
call_dirty_nif_zero_args() -> ?nif_stub.
dirty_call_while_terminated_nif(_) -> ?nif_stub.
dirty_sleeper() -> ?nif_stub.
dirty_sleeper(_) -> ?nif_stub.
dirty_heap_access_nif(_) -> ?nif_stub.
nif_stub_error(Line) ->
exit({nif_not_loaded,module,?MODULE,line,Line}).
