diff options
Diffstat (limited to 'erts/emulator')
| -rw-r--r-- | erts/emulator/test/port_SUITE.erl | 38 |
1 files changed, 36 insertions, 2 deletions
diff --git a/erts/emulator/test/port_SUITE.erl b/erts/emulator/test/port_SUITE.erl index b67fd1c409..6cc86a26a3 100644 --- a/erts/emulator/test/port_SUITE.erl +++ b/erts/emulator/test/port_SUITE.erl @@ -86,7 +86,7 @@ iter_max_ports/1, eof/1, input_only/1, output_only/1, name1/1, t_binary/1, parallell/1, t_exit/1, - env/1, bad_env/1, cd/1, exit_status/1, + env/1, huge_env/1, bad_env/1, cd/1, exit_status/1, tps_16_bytes/1, tps_1K/1, line/1, stderr_to_stdout/1, otp_3906/1, otp_4389/1, win_massive/1, win_massive_client/1, mix_up_ports/1, otp_5112/1, otp_5119/1, otp_6224/1, @@ -112,7 +112,7 @@ all() -> bad_packet, bad_port_messages, {group, options}, {group, multiple_packets}, parallell, dying_port, port_program_with_path, open_input_file_port, - open_output_file_port, name1, env, bad_env, cd, + open_output_file_port, name1, env, huge_env, bad_env, cd, exit_status, iter_max_ports, count_fds, t_exit, {group, tps}, line, stderr_to_stdout, otp_3906, otp_4389, win_massive, mix_up_ports, otp_5112, otp_5119, @@ -962,6 +962,40 @@ try_bad_env(Env) -> error:badarg -> ok end. +%% Test that we can handle a very very large environment gracefully. +huge_env(Config) when is_list(Config) -> + Vars = case os:type() of + {win32,_} -> 500; + _ -> + %% We create a huge environment, + %% 20000 variables is about 25MB + %% which seems to be the limit on Linux. + 20000 + end, + Env = [{[$a + I div (25*25*25*25) rem 25, + $a + I div (25*25*25) rem 25, + $a + I div (25*25) rem 25, + $a+I div 25 rem 25, $a+I rem 25], + lists:duplicate(100,$a+I rem 25)} + || I <- lists:seq(1,Vars)], + try erlang:open_port({spawn,"ls"},[exit_status, {env, Env}]) of + P -> + receive + {P, {exit_status,N}} = M -> + %% We test that the exit status is an integer, this means + %% that the child program has started. If we get an atom + %% something went wrong in the driver which is not ok. + ct:log("Got ~p",[M]), + true = is_integer(N) + end + catch E:R -> + %% Have to catch the error here, as printing the stackdump + %% in the ct log is way to heavy for some test machines. + ct:fail("Open port failed ~p:~p",[E,R]) + end. + + + %% 'cd' option %% (Can perhaps be made smaller by calling the other utility functions %% in this module.) |