diff options
Diffstat (limited to 'erts/emulator/test')
| -rw-r--r-- | erts/emulator/test/Makefile | 1 | ||||
| -rw-r--r-- | erts/emulator/test/lcnt_SUITE.erl | 156 |
2 files changed, 157 insertions, 0 deletions
diff --git a/erts/emulator/test/Makefile b/erts/emulator/test/Makefile index 2479ccc01f..627ca13887 100644 --- a/erts/emulator/test/Makefile +++ b/erts/emulator/test/Makefile @@ -73,6 +73,7 @@ MODULES= \ hipe_SUITE \ list_bif_SUITE \ lttng_SUITE \ + lcnt_SUITE \ map_SUITE \ match_spec_SUITE \ module_info_SUITE \ diff --git a/erts/emulator/test/lcnt_SUITE.erl b/erts/emulator/test/lcnt_SUITE.erl new file mode 100644 index 0000000000..504b9b54cf --- /dev/null +++ b/erts/emulator/test/lcnt_SUITE.erl @@ -0,0 +1,156 @@ +%% +%% %CopyrightBegin% +%% +%% Copyright Ericsson AB 2017. 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(lcnt_SUITE). + +-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]). + +-export( + [toggle_lock_counting/1, error_on_invalid_category/1, preserve_locks/1]). + +suite() -> + [{ct_hooks,[ts_install_cth]}, + {timetrap, {seconds, 10}}]. + +all() -> + [toggle_lock_counting, error_on_invalid_category, preserve_locks]. + +init_per_suite(Config) -> + case erlang:system_info(lock_counting) of + true -> + %% The tests will run straight over these properties, so we have to + %% preserve them to avoid tainting the other tests. + OldCopySave = erts_debug:lcnt_control(copy_save), + OldMask = erts_debug:lcnt_control(mask), + [{lcnt_SUITE, {OldCopySave, OldMask}} | Config]; + _ -> + {skip, "Lock counting is not enabled"} + end. + +end_per_suite(Config) -> + {OldCopySave, OldMask} = proplists:get_value(lcnt_SUITE, Config), + + erts_debug:lcnt_control(copy_save, OldCopySave), + OldCopySave = erts_debug:lcnt_control(copy_save), + + erts_debug:lcnt_control(mask, OldMask), + OldMask = erts_debug:lcnt_control(mask), + + erts_debug:lcnt_clear(), + ok. + +init_per_testcase(_Case, Config) -> + disable_lock_counting(), + Config. + +end_per_testcase(_Case, _Config) -> + ok. + +disable_lock_counting() -> + ok = erts_debug:lcnt_control(copy_save, false), + ok = erts_debug:lcnt_control(mask, []), + ok = erts_debug:lcnt_clear(), + + %% Sanity check. + false = erts_debug:lcnt_control(copy_save), + [] = erts_debug:lcnt_control(mask), + + %% The above commands rely on some lazy operations, so we'll have to wait + %% for the list to clear. + ok = wait_for_empty_lock_list(). + +wait_for_empty_lock_list() -> + wait_for_empty_lock_list(10). +wait_for_empty_lock_list(Tries) when Tries > 0 -> + try_flush_cleanup_ops(), + case erts_debug:lcnt_collect() of + [{duration, _}, {locks, []}] -> + ok; + _ -> + timer:sleep(50), + wait_for_empty_lock_list(Tries - 1) + end; +wait_for_empty_lock_list(0) -> + ct:fail("Lock list failed to clear after disabling lock counting."). + +%% Queue up a lot of thread progress cleanup ops in a vain attempt to +%% flush the lock list. +try_flush_cleanup_ops() -> + false = lists:member(process, erts_debug:lcnt_control(mask)), + [spawn(fun() -> ok end) || _ <- lists:seq(1, 1000)]. + +%% +%% Test cases +%% + +toggle_lock_counting(Config) when is_list(Config) -> + Categories = + [allocator, db, debug, distribution, generic, io, process, scheduler], + lists:foreach( + fun(Category) -> + Locks = get_lock_info_for(Category), + if + Locks =/= [] -> + disable_lock_counting(); + Locks =:= [] -> + ct:fail("Failed to toggle ~p locks.", [Category]) + end + end, Categories). + +get_lock_info_for(Categories) when is_list(Categories) -> + ok = erts_debug:lcnt_control(mask, Categories), + [{duration, _}, {locks, Locks}] = erts_debug:lcnt_collect(), + Locks; + +get_lock_info_for(Category) when is_atom(Category) -> + get_lock_info_for([Category]). + +preserve_locks(Config) when is_list(Config) -> + erts_debug:lcnt_control(mask, [process]), + + erts_debug:lcnt_control(copy_save, true), + [spawn(fun() -> ok end) || _ <- lists:seq(1, 1000)], + + %% Wait for the processes to be fully destroyed before disabling copy_save, + %% then remove all active locks from the list. (There's no foolproof method + %% to do this; sleeping before/after is the best way we have) + timer:sleep(500), + + erts_debug:lcnt_control(copy_save, false), + erts_debug:lcnt_control(mask, []), + + try_flush_cleanup_ops(), + timer:sleep(500), + + case erts_debug:lcnt_collect() of + [{duration, _}, {locks, Locks}] when length(Locks) > 0 -> + ct:pal("Preserved ~p locks.", [length(Locks)]); + [{duration, _}, {locks, []}] -> + ct:fail("copy_save didn't preserve any locks.") + end. + +error_on_invalid_category(Config) when is_list(Config) -> + {error, badarg, q_invalid} = erts_debug:lcnt_control(mask, [q_invalid]), + ok. |