%%
%% %CopyrightBegin%
%%
%% Copyright Ericsson AB 2005-2012. 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(bif_SUITE).
-include_lib("test_server/include/test_server.hrl").
-export([all/0, suite/0,groups/0,init_per_suite/1, end_per_suite/1,
init_per_group/2,end_per_group/2,
init_per_testcase/2,end_per_testcase/2,
display/1, display_huge/0,
erl_bif_types/1,guard_bifs_in_erl_bif_types/1,
shadow_comments/1,
specs/1,improper_bif_stubs/1,auto_imports/1,
t_list_to_existing_atom/1,os_env/1,otp_7526/1,
binary_to_atom/1,binary_to_existing_atom/1,
atom_to_binary/1,min_max/1, erlang_halt/1]).
suite() -> [{ct_hooks,[ts_install_cth]}].
all() ->
[erl_bif_types, guard_bifs_in_erl_bif_types, shadow_comments,
specs, improper_bif_stubs, auto_imports,
t_list_to_existing_atom, os_env, otp_7526,
display,
atom_to_binary, binary_to_atom, binary_to_existing_atom,
min_max, erlang_halt].
groups() ->
[].
init_per_suite(Config) ->
Config.
end_per_suite(_Config) ->
ok.
init_per_group(_GroupName, Config) ->
Config.
end_per_group(_GroupName, Config) ->
Config.
init_per_testcase(Func, Config) when is_atom(Func), is_list(Config) ->
Dog=?t:timetrap(?t:minutes(1)),
[{watchdog, Dog}|Config].
end_per_testcase(_Func, Config) ->
Dog=?config(watchdog, Config),
?t:timetrap_cancel(Dog).
display(suite) ->
[];
display(doc) ->
["Uses erlang:display to test that erts_printf does not do deep recursion"];
display(Config) when is_list(Config) ->
Pa = filename:dirname(code:which(?MODULE)),
{ok, Node} = test_server:start_node(display_huge_term,peer,
[{args, "-pa \""++Pa++"\""}]),
true = rpc:call(Node,?MODULE,display_huge,[]),
test_server:stop_node(Node),
ok.
display_huge() ->
erlang:display(deeep(100000)).
deeep(0,Acc) ->
Acc;
deeep(N,Acc) ->
deeep(N-1,[Acc|[]]).
deeep(N) ->
deeep(N,[hello]).
erl_bif_types(Config) when is_list(Config) ->
ensure_erl_bif_types_compiled(),
List0 = erlang:system_info(snifs),
%% Ignore missing type information for hipe BIFs.
List = [MFA || {M,_,_}=MFA <- List0, M =/= hipe_bifs],
KnownTypes = [MFA || MFA <- List, known_types(MFA)],
io:format("There are ~p BIFs with type information in erl_bif_types.",
[length(KnownTypes)]),
erl_bif_types_2(KnownTypes).
erl_bif_types_2(List) ->
BadArity = [MFA || {M,F,A}=MFA <- List,
begin
Types = erl_bif_types:arg_types(M, F, A),
length(Types) =/= A
end],
case BadArity of
[] ->
erl_bif_types_3(List);
[_|_] ->
io:put_chars("Bifs with bad arity\n"),
io:format("~p\n", [BadArity]),
?line ?t:fail({length(BadArity),bad_arity})
end.
erl_bif_types_3(List) ->
BadSmokeTest = [MFA || {M,F,A}=MFA <- List,
begin
try erl_bif_types:type(M, F, A) of
Type ->
%% Test that type is returned.
not erl_types:is_erl_type(Type)
catch
Class:Error ->
io:format("~p: ~p ~p\n",
[MFA,Class,Error]),
true
end
end],
case BadSmokeTest of
[] ->
ok;
[_|_] ->
io:put_chars("Bifs with failing calls to erlang_bif_types:type/3 "
"(or with bogus return values):\n"),
io:format("~p\n", [BadSmokeTest]),
?line ?t:fail({length(BadSmokeTest),bad_smoke_test})
end.
guard_bifs_in_erl_bif_types(_Config) ->
ensure_erl_bif_types_compiled(),
List0 = erlang:system_info(snifs),
List = [{F,A} || {erlang,F,A} <- List0,
erl_internal:guard_bif(F, A)],
Not = [FA || {F,A}=FA <- List,
not erl_bif_types:is_known(erlang, F, A)],
case Not of
[] ->
ok;
[_|_] ->
io:put_chars(
["Dialyzer requires that all guard BIFs "
"have type information in erl_bif_types.\n\n"
"The following guard BIFs have no type information "
"in erl_bif_types:\n\n",
[io_lib:format(" ~p/~p\n", [F,A]) || {F,A} <- Not]]),
?t:fail()
end.
shadow_comments(_Config) ->
ensure_erl_bif_types_compiled(),
List0 = erlang:system_info(snifs),
List1 = [MFA || {M,_,_}=MFA <- List0, M =/= hipe_bifs],
List = [MFA || MFA <- List1, not is_operator(MFA)],
HasTypes = [MFA || {M,F,A}=MFA <- List,
erl_bif_types:is_known(M, F, A)],
Path = get_code_path(),
BifRel = sofs:relation(HasTypes, [{m,f,a}]),
BifModules = sofs:to_external(sofs:projection(1, BifRel)),
AbstrByModule = [extract_abstract(Mod, Path) || Mod <- BifModules],
Specs0 = [extract_specs(Mod, Abstr) ||
{Mod,Abstr} <- AbstrByModule],
Specs = lists:append(Specs0),
SpecFuns0 = [F || {F,_} <- Specs],
SpecFuns = sofs:relation(SpecFuns0, [{m,f,a}]),
HasTypesAndSpecs = sofs:intersection(BifRel, SpecFuns),
Commented0 = lists:append([extract_comments(Mod, Path) ||
Mod <- BifModules]),
Commented = sofs:relation(Commented0, [{m,f,a}]),
{NoComments0,_,NoBifSpecs0} =
sofs:symmetric_partition(HasTypesAndSpecs, Commented),
NoComments = sofs:to_external(NoComments0),
NoBifSpecs = sofs:to_external(NoBifSpecs0),
case NoComments of
[] ->
ok;
[_|_] ->
io:put_chars(
["If a BIF stub has both a spec and has type information in "
"erl_bif_types, there *must*\n"
"be a comment in the source file to make that immediately "
"obvious.\n\nThe following comments are missing:\n\n",
[io_lib:format("%% Shadowed by erl_bif_types: ~p:~p/~p\n",
[M,F,A]) || {M,F,A} <- NoComments]]),
?t:fail()
end,
case NoBifSpecs of
[] ->
ok;
[_|_] ->
io:put_chars(
["The following functions have \"shadowed\" comments "
"claiming that there is type information in erl_bif_types,\n"
"but actually there is no such type information.\n\n"
"Therefore, the following comments should be removed:\n\n",
[io_lib:format("%% Shadowed by erl_bif_types: ~p:~p/~p\n",
[M,F,A]) || {M,F,A} <- NoBifSpecs]]),
?t:fail()
end.
extract_comments(Mod, Path) ->
Beam = which(Mod, Path),
SrcDir = filename:join(filename:dirname(filename:dirname(Beam)), "src"),
Src = filename:join(SrcDir, atom_to_list(Mod) ++ ".erl"),
{ok,Bin} = file:read_file(Src),
Lines0 = binary:split(Bin, <<"\n">>, [global]),
Lines1 = [T || <<"%% Shadowed by erl_bif_types: ",T/binary>> <- Lines0],
{ok,ReMFA} = re:compile("([^:]*):([^/]*)/(\\d*)"),
Lines = [L || L <- Lines1, re:run(L, ReMFA, [{capture,[]}]) =:= match],
[begin
{match,[M,F,A]} = re:run(L, ReMFA, [{capture,all_but_first,list}]),
{list_to_atom(M),list_to_atom(F),list_to_integer(A)}
end || L <- Lines].
ensure_erl_bif_types_compiled() ->
c:l(erl_bif_types),
case erlang:function_exported(erl_bif_types, module_info, 0) of
false ->
%% Fail cleanly.
?t:fail("erl_bif_types not compiled");
true ->
ok
end.
known_types({M,F,A}) ->
erl_bif_types:is_known(M, F, A).
specs(_) ->
List0 = erlang:system_info(snifs),
%% Ignore missing type information for hipe BIFs.
List1 = [MFA || {M,_,_}=MFA <- List0, M =/= hipe_bifs],
%% Ignore all operators.
List = [MFA || MFA <- List1, not is_operator(MFA)],
%% Extract specs from the abstract code for all BIFs.
Path = get_code_path(),
BifRel = sofs:relation(List, [{m,f,a}]),
BifModules = sofs:to_external(sofs:projection(1, BifRel)),
AbstrByModule = [extract_abstract(Mod, Path) || Mod <- BifModules],
Specs0 = [extract_specs(Mod, Abstr) ||
{Mod,Abstr} <- AbstrByModule],
Specs = lists:append(Specs0),
BifSet = sofs:set(List, [function]),
SpecRel0 = sofs:relation(Specs, [{function,spec}]),
SpecRel = sofs:restriction(SpecRel0, BifSet),
%% Find BIFs without specs.
NoSpecs0 = sofs:difference(BifSet, sofs:domain(SpecRel)),
NoSpecs = sofs:to_external(NoSpecs0),
case NoSpecs of
[] ->
ok;
[_|_] ->
io:put_chars("The following BIFs don't have specs:\n"),
[print_mfa(MFA) || MFA <- NoSpecs],
?t:fail()
end.
is_operator({erlang,F,A}) ->
erl_internal:arith_op(F, A) orelse
erl_internal:bool_op(F, A) orelse
erl_internal:comp_op(F, A) orelse
erl_internal:list_op(F, A) orelse
erl_internal:send_op(F, A);
is_operator(_) -> false.
extract_specs(M, Abstr) ->
[{make_mfa(M, Name),Spec} || {attribute,_,spec,{Name,Spec}} <- Abstr].
make_mfa(M, {F,A}) -> {M,F,A};
make_mfa(M, {M,_,_}=MFA) -> MFA.
improper_bif_stubs(_) ->
Bifs0 = erlang:system_info(snifs),
Bifs = [MFA || {M,_,_}=MFA <- Bifs0, M =/= hipe_bifs],
Path = get_code_path(),
BifRel = sofs:relation(Bifs, [{m,f,a}]),
BifModules = sofs:to_external(sofs:projection(1, BifRel)),
AbstrByModule = [extract_abstract(Mod, Path) || Mod <- BifModules],
Funcs0 = [extract_functions(Mod, Abstr) ||
{Mod,Abstr} <- AbstrByModule],
Funcs = lists:append(Funcs0),
BifSet = sofs:set(Bifs, [function]),
FuncRel0 = sofs:relation(Funcs, [{function,code}]),
FuncRel = sofs:restriction(FuncRel0, BifSet),
[check_stub(MFA, Body) || {MFA,Body} <- sofs:to_external(FuncRel)],
ok.
auto_imports(_Config) ->
Path = get_code_path(),
{erlang,Abstr} = extract_abstract(erlang, Path),
SpecFuns = [Name || {attribute,_,spec,{Name,_}} <- Abstr],
auto_imports(SpecFuns, 0).
auto_imports([{F,A}|T], Errors) ->
case erl_internal:bif(F, A) of
false ->
io:format("~p/~p: not auto-imported, but spec claims it "
"is auto-imported", [F,A]),
auto_imports(T, Errors+1);
true ->
auto_imports(T, Errors)
end;
auto_imports([{erlang,F,A}|T], Errors) ->
case erl_internal:bif(F, A) of
false ->
auto_imports(T, Errors);
true ->
io:format("~p/~p: auto-imported, but "
"spec claims it is *not* auto-imported", [F,A]),
auto_imports(T, Errors+1)
end;
auto_imports([], 0) ->
ok;
auto_imports([], Errors) ->
?t:fail({Errors,inconsistencies}).
extract_functions(M, Abstr) ->
[{{M,F,A},Body} || {function,_,F,A,Body} <- Abstr].
check_stub({erlang,apply,3}, _) ->
ok;
check_stub({_,F,A}, B) ->
try
[{clause,_,Args,[],Body}] = B,
A = length(Args),
[{call,_,{remote,_,{atom,_,erlang},{atom,_,nif_error}},[_]}] = Body
catch
_:_ ->
io:put_chars("Invalid body for the following BIF stub:\n"),
Func = {function,0,F,A,B},
io:put_chars(erl_pp:function(Func)),
io:nl(),
io:put_chars("The body should be: erlang:nif_error(undef)"),
?t:fail()
end.
t_list_to_existing_atom(Config) when is_list(Config) ->
?line all = list_to_existing_atom("all"),
?line ?MODULE = list_to_existing_atom(?MODULE_STRING),
?line UnlikelyStr = "dsfj923874390867er869fds9864y97jhg3973qerueoru",
try
?line list_to_existing_atom(UnlikelyStr),
?line ?t:fail()
catch
error:badarg -> ok
end,
%% The compiler has become smarter! We need the call to id/1 in
%% the next line.
?line UnlikelyAtom = list_to_atom(id(UnlikelyStr)),
?line UnlikelyAtom = list_to_existing_atom(UnlikelyStr),
ok.
os_env(doc) ->
[];
os_env(suite) ->
[];
os_env(Config) when is_list(Config) ->
?line EnvVar1 = "MjhgvFDrresdCghN mnjkUYg vfrD",
?line false = os:getenv(EnvVar1),
?line true = os:putenv(EnvVar1, "mors"),
?line "mors" = os:getenv(EnvVar1),
?line true = os:putenv(EnvVar1, ""),
?line case os:getenv(EnvVar1) of
"" -> ?line ok;
false -> ?line ok;
BadVal -> ?line ?t:fail(BadVal)
end,
%% os:putenv and os:getenv currently uses a temp buf of size 1024
%% for storing key+value
?line os_env_long(1010, 1030, "hej hopp").
os_env_long(Min, Max, _Value) when Min > Max ->
?line ok;
os_env_long(Min, Max, Value) ->
?line EnvVar = lists:duplicate(Min, $X),
?line true = os:putenv(EnvVar, Value),
?line Value = os:getenv(EnvVar),
?line true = os:putenv(EnvVar, ""),
?line os_env_long(Min+1, Max, Value).
otp_7526(doc) ->
["Test that string:to_integer does not Halloc in wrong order."];
otp_7526(Config) when is_list(Config) ->
ok = test_7526(256).
iterate_7526(0, Acc) -> Acc;
iterate_7526(N, Acc) ->
iterate_7526(N - 1,
[case string:to_integer("9223372036854775808,\n") of
{Int, _Foo} -> Int
end | Acc]).
do_test_7526(N,M) ->
{Self, Ref} = {self(), make_ref()},
T = erlang:make_tuple(M,0),
spawn_opt(fun()->
L = iterate_7526(N, []),
BadList = [X || X <- L, X =/= 9223372036854775808],
BadLen = length(BadList),
M = length(tuple_to_list(T)),
%%io:format("~b bad conversions: ~p~n", [BadLen, BadList]),
Self ! {done, Ref, BadLen}
end,
[link,{fullsweep_after,0}]),
receive {done, Ref, Len} -> Len end.
test_7526(0) ->
ok;
test_7526(N) ->
case do_test_7526(1000,N) of
0 -> test_7526(N-1);
Other ->
{error,N,Other}
end.
-define(BADARG(E), {'EXIT',{badarg,_}} = (catch E)).
-define(SYS_LIMIT(E), {'EXIT',{system_limit,_}} = (catch E)).
binary_to_atom(Config) when is_list(Config) ->
HalfLong = lists:seq(0, 127),
HalfLongAtom = list_to_atom(HalfLong),
HalfLongBin = list_to_binary(HalfLong),
Long = lists:seq(0, 254),
LongAtom = list_to_atom(Long),
LongBin = list_to_binary(Long),
%% latin1
?line '' = test_binary_to_atom(<<>>, latin1),
?line '\377' = test_binary_to_atom(<<255>>, latin1),
?line HalfLongAtom = test_binary_to_atom(HalfLongBin, latin1),
?line LongAtom = test_binary_to_atom(LongBin, latin1),
%% utf8
?line '' = test_binary_to_atom(<<>>, utf8),
?line HalfLongAtom = test_binary_to_atom(HalfLongBin, utf8),
?line HalfLongAtom = test_binary_to_atom(HalfLongBin, unicode),
?line [] = [C || C <- lists:seq(128, 255),
begin
list_to_atom([C]) =/=
test_binary_to_atom(<<C/utf8>>, utf8)
end],
%% badarg failures.
?line fail_binary_to_atom(atom),
?line fail_binary_to_atom(42),
?line fail_binary_to_atom({a,b,c}),
?line fail_binary_to_atom([1,2,3]),
?line fail_binary_to_atom([]),
?line fail_binary_to_atom(42.0),
?line fail_binary_to_atom(self()),
?line fail_binary_to_atom(make_ref()),
?line fail_binary_to_atom(<<0:7>>),
?line fail_binary_to_atom(<<42:13>>),
?line ?BADARG(binary_to_atom(id(<<>>), blurf)),
?line ?BADARG(binary_to_atom(id(<<>>), [])),
%% Bad UTF8 sequences.
?line ?BADARG(binary_to_atom(id(<<255>>), utf8)),
?line ?BADARG(binary_to_atom(id(<<255,0>>), utf8)),
?line ?BADARG(binary_to_atom(id(<<0:512/unit:8,255>>), utf8)),
?line ?BADARG(binary_to_atom(id(<<0:512/unit:8,255,0>>), utf8)),
?line ?BADARG(binary_to_atom(id(<<16#C0,16#80>>), utf8)), %Overlong 0.
?line [?BADARG(binary_to_atom(<<C/utf8>>, utf8)) ||
C <- lists:seq(256, 16#D7FF)],
?line [?BADARG(binary_to_atom(<<C/utf8>>, utf8)) ||
C <- lists:seq(16#E000, 16#FFFD)],
?line [?BADARG(binary_to_atom(<<C/utf8>>, utf8)) ||
C <- lists:seq(16#10000, 16#8FFFF)],
?line [?BADARG(binary_to_atom(<<C/utf8>>, utf8)) ||
C <- lists:seq(16#90000, 16#10FFFF)],
%% system_limit failures.
?line ?SYS_LIMIT(binary_to_atom(<<0:256/unit:8>>, latin1)),
?line ?SYS_LIMIT(binary_to_atom(<<0:257/unit:8>>, latin1)),
?line ?SYS_LIMIT(binary_to_atom(<<0:512/unit:8>>, latin1)),
?line ?SYS_LIMIT(binary_to_atom(<<0:256/unit:8>>, utf8)),
?line ?SYS_LIMIT(binary_to_atom(<<0:257/unit:8>>, utf8)),
?line ?SYS_LIMIT(binary_to_atom(<<0:512/unit:8>>, utf8)),
ok.
test_binary_to_atom(Bin0, Encoding) ->
Res = binary_to_atom(Bin0, Encoding),
Res = binary_to_existing_atom(Bin0, Encoding),
Bin1 = id(<<7:3,Bin0/binary,32:5>>),
Sz = byte_size(Bin0),
<<_:3,UnalignedBin:Sz/binary,_:5>> = Bin1,
Res = binary_to_atom(UnalignedBin, Encoding).
fail_binary_to_atom(Bin) ->
try
binary_to_atom(Bin, latin1)
catch
error:badarg ->
ok
end,
try
binary_to_atom(Bin, utf8)
catch
error:badarg ->
ok
end,
try
binary_to_existing_atom(Bin, latin1)
catch
error:badarg ->
ok
end,
try
binary_to_existing_atom(Bin, utf8)
catch
error:badarg ->
ok
end.
binary_to_existing_atom(Config) when is_list(Config) ->
?line UnlikelyBin = <<"ou0897979655678dsfj923874390867er869fds973qerueoru">>,
try
?line binary_to_existing_atom(UnlikelyBin, latin1),
?line ?t:fail()
catch
error:badarg -> ok
end,
try
?line binary_to_existing_atom(UnlikelyBin, utf8),
?line ?t:fail()
catch
error:badarg -> ok
end,
?line UnlikelyAtom = binary_to_atom(id(UnlikelyBin), latin1),
?line UnlikelyAtom = binary_to_existing_atom(UnlikelyBin, latin1),
ok.
atom_to_binary(Config) when is_list(Config) ->
HalfLong = lists:seq(0, 127),
HalfLongAtom = list_to_atom(HalfLong),
HalfLongBin = list_to_binary(HalfLong),
Long = lists:seq(0, 254),
LongAtom = list_to_atom(Long),
LongBin = list_to_binary(Long),
%% latin1
?line <<>> = atom_to_binary('', latin1),
?line <<"abc">> = atom_to_binary(abc, latin1),
?line <<127>> = atom_to_binary('\177', latin1),
?line HalfLongBin = atom_to_binary(HalfLongAtom, latin1),
?line LongBin = atom_to_binary(LongAtom, latin1),
%% utf8.
?line <<>> = atom_to_binary('', utf8),
?line <<>> = atom_to_binary('', unicode),
?line <<127>> = atom_to_binary('\177', utf8),
?line <<"abcdef">> = atom_to_binary(abcdef, utf8),
?line HalfLongBin = atom_to_binary(HalfLongAtom, utf8),
?line LongAtomBin = atom_to_binary(LongAtom, utf8),
?line verify_long_atom_bin(LongAtomBin, 0),
%% Failing cases.
?line fail_atom_to_binary(<<1>>),
?line fail_atom_to_binary(42),
?line fail_atom_to_binary({a,b,c}),
?line fail_atom_to_binary([1,2,3]),
?line fail_atom_to_binary([]),
?line fail_atom_to_binary(42.0),
?line fail_atom_to_binary(self()),
?line fail_atom_to_binary(make_ref()),
?line ?BADARG(atom_to_binary(id(a), blurf)),
?line ?BADARG(atom_to_binary(id(b), [])),
ok.
verify_long_atom_bin(<<I/utf8,T/binary>>, I) ->
verify_long_atom_bin(T, I+1);
verify_long_atom_bin(<<>>, 255) -> ok.
fail_atom_to_binary(Term) ->
try
atom_to_binary(Term, latin1)
catch
error:badarg ->
ok
end,
try
atom_to_binary(Term, utf8)
catch
error:badarg ->
ok
end.
min_max(Config) when is_list(Config) ->
?line a = erlang:min(id(a), a),
?line a = erlang:min(id(a), b),
?line a = erlang:min(id(b), a),
?line b = erlang:min(id(b), b),
?line a = erlang:max(id(a), a),
?line b = erlang:max(id(a), b),
?line b = erlang:max(id(b), a),
?line b = erlang:max(id(b), b),
?line 42.0 = erlang:min(42.0, 42),
?line 42.0 = erlang:max(42.0, 42),
%% And now (R14) they are also autoimported!
?line a = min(id(a), a),
?line a = min(id(a), b),
?line a = min(id(b), a),
?line b = min(id(b), b),
?line a = max(id(a), a),
?line b = max(id(a), b),
?line b = max(id(b), a),
?line b = max(id(b), b),
?line 42.0 = min(42.0, 42),
?line 42.0 = max(42.0, 42),
ok.
erlang_halt(Config) when is_list(Config) ->
try erlang:halt(undefined) of
_-> ?t:fail({erlang,halt,{undefined}})
catch error:badarg -> ok end,
try halt(undefined) of
_-> ?t:fail({halt,{undefined}})
catch error:badarg -> ok end,
try erlang:halt(undefined, []) of
_-> ?t:fail({erlang,halt,{undefined,[]}})
catch error:badarg -> ok end,
try halt(undefined, []) of
_-> ?t:fail({halt,{undefined,[]}})
catch error:badarg -> ok end,
try halt(0, undefined) of
_-> ?t:fail({halt,{0,undefined}})
catch error:badarg -> ok end,
try halt(0, [undefined]) of
_-> ?t:fail({halt,{0,[undefined]}})
catch error:badarg -> ok end,
try halt(0, [{undefined,true}]) of
_-> ?t:fail({halt,{0,[{undefined,true}]}})
catch error:badarg -> ok end,
try halt(0, [{flush,undefined}]) of
_-> ?t:fail({halt,{0,[{flush,undefined}]}})
catch error:badarg -> ok end,
try halt(0, [{flush,true,undefined}]) of
_-> ?t:fail({halt,{0,[{flush,true,undefined}]}})
catch error:badarg -> ok end,
H = hostname(),
{ok,N1} = slave:start(H, halt_node1),
{badrpc,nodedown} = rpc:call(N1, erlang, halt, []),
{ok,N2} = slave:start(H, halt_node2),
{badrpc,nodedown} = rpc:call(N2, erlang, halt, [0]),
{ok,N3} = slave:start(H, halt_node3),
{badrpc,nodedown} = rpc:call(N3, erlang, halt, [0,[]]),
ok.
%% Helpers
id(I) -> I.
%% Get code path, including the path for the erts application.
get_code_path() ->
case code:lib_dir(erts) of
{error,bad_name} ->
Erts = filename:join([code:root_dir(),"erts","preloaded","ebin"]),
[Erts|code:get_path()];
_ ->
code:get_path()
end.
which(Mod, Path) ->
which_1(atom_to_list(Mod) ++ ".beam", Path).
which_1(Base, [D|Ds]) ->
Path = filename:join(D, Base),
case filelib:is_regular(Path) of
true -> Path;
false -> which_1(Base, Ds)
end.
print_mfa({M,F,A}) ->
io:format("~p:~p/~p", [M,F,A]).
extract_abstract(Mod, Path) ->
Beam = which(Mod, Path),
{ok,{Mod,[{abstract_code,{raw_abstract_v1,Abstr}}]}} =
beam_lib:chunks(Beam, [abstract_code]),
{Mod,Abstr}.
hostname() ->
hostname(atom_to_list(node())).
hostname([$@ | Hostname]) ->
list_to_atom(Hostname);
hostname([_C | Cs]) ->
hostname(Cs).
