lager/test/crash.erl

%% a module that crashes in just about every way possible

-module(crash).

-behaviour(gen_server).

-export([init/1, handle_call/3, handle_cast/2, handle_info/2, terminate/2, code_change/3]).

-export([start/0]).

start() ->
	gen_server:start({local, ?MODULE}, ?MODULE, [], []).

init(_) ->
	{ok, {}}.

handle_call(undef, _, State) ->
	{reply, ?MODULE:booger(), State};
handle_call(badfun, _, State) ->
	M = booger,
	{reply, M(), State};
handle_call(bad_return, _, _) ->
	bleh;
handle_call(bad_return_string, _, _) ->
	{tuple, {tuple, "string"}};
handle_call(case_clause, _, State) ->
	case State of
		goober ->
			{reply, ok, State}
	end;
handle_call(case_clause_string, _, State) ->
	Foo = atom_to_list(?MODULE),
	case Foo of
		State ->
			{reply, ok, State}
	end;
handle_call(if_clause, _, State) ->
	if State == 1 ->
			{reply, ok, State}
	end;
handle_call(try_clause, _, State) ->
	Res = try tuple_to_list(State) of
		[_A, _B] -> ok
	catch
		_:_ -> ok
	end,
	{reply, Res, State};
handle_call(badmatch, _, State) ->
	{A, B, C} = State,
	{reply, [A, B, C], State};
handle_call(function_clause, _, State) ->
	{reply, function(State), State};
handle_call(badarith, _, State) ->
	Res = 1 / length(tuple_to_list(State)),
	{reply, Res, State};
handle_call(badarg1, _, State) ->
	Res = list_to_binary(["foo", bar]),
	{reply, Res, State};
handle_call(badarg2, _, State) ->
	Res = erlang:iolist_to_binary(["foo", bar]),
	{reply, Res, State};
handle_call(system_limit, _, State) ->
	Res = list_to_atom(lists:flatten(lists:duplicate(256, "a"))),
	{reply, Res, State};
handle_call(process_limit, _, State) ->
	%% run with +P 300 to make this crash
	[erlang:spawn(fun() -> timer:sleep(5000) end) || _ <- lists:seq(0, 500)],
	{reply, ok, State};
handle_call(port_limit, _, State) ->
	[erlang:open_port({spawn, "ls"}, []) || _ <- lists:seq(0, 1024)],
	{reply, ok, State};
handle_call(noproc, _, State) ->
	Res = gen_event:call(foo, bar, baz),
	{reply, Res, State};
handle_call(badarity, _, State) ->
	F = fun(A, B, C) -> A + B + C end,
	Res = F(State),
	{reply, Res, State};
handle_call(_Call, _From, State) ->
	{reply, ok, State}.

handle_cast(_Cast, State) ->
	{noreply, State}.

handle_info(_Info, State) ->
	{noreply, State}.

terminate(_, _) ->
	ok.

code_change(_, State, _) ->
	{ok, State}.

function(X) when is_list(X) ->
	ok.