diff options
Diffstat (limited to 'erts/emulator/test/trace_local_SUITE.erl')
| -rw-r--r-- | erts/emulator/test/trace_local_SUITE.erl | 53 |
1 files changed, 50 insertions, 3 deletions
diff --git a/erts/emulator/test/trace_local_SUITE.erl b/erts/emulator/test/trace_local_SUITE.erl index 32e2a98e3c..b238d5c630 100644 --- a/erts/emulator/test/trace_local_SUITE.erl +++ b/erts/emulator/test/trace_local_SUITE.erl @@ -80,6 +80,7 @@ config(priv_dir,_) -> exception_meta_nocatch/1, exception_meta_nocatch_apply/1, exception_meta_nocatch_function/1, exception_meta_nocatch_apply_function/1, + concurrency/1, init_per_testcase/2, end_per_testcase/2]). init_per_testcase(_Case, Config) -> ?line Dog=test_server:timetrap(test_server:minutes(2)), @@ -89,7 +90,15 @@ end_per_testcase(_Case, Config) -> shutdown(), Dog=?config(watchdog, Config), test_server:timetrap_cancel(Dog), - ok. + + %% Reloading the module will clear all trace patterns, and + %% in a debug-compiled emulator run assertions of the counters + %% for the number of functions with breakpoints. + + c:l(?MODULE). + + + suite() -> [{ct_hooks,[ts_install_cth]}]. all() -> @@ -106,7 +115,8 @@ all() -> exception_meta_apply_function, exception_meta_nocatch, exception_meta_nocatch_apply, exception_meta_nocatch_function, - exception_meta_nocatch_apply_function] + exception_meta_nocatch_apply_function, + concurrency] end. groups() -> @@ -350,7 +360,8 @@ same(A, B) -> basic_test() -> ?line setup([call]), - ?line erlang:trace_pattern({?MODULE,'_','_'},[],[local]), + NumMatches = erlang:trace_pattern({?MODULE,'_','_'},[],[local]), + NumMatches = erlang:trace_pattern({?MODULE,'_','_'},[],[local]), ?line erlang:trace_pattern({?MODULE,slave,'_'},false,[local]), ?line [1,1,1,1] = apply_slave(?MODULE,exported_wrap,[1]), ?line ?CT(?MODULE,exported_wrap,[1]), @@ -813,6 +824,42 @@ clean_location({crash,{Reason,Stk0}}) -> {crash,{Reason,Stk}}; clean_location(Term) -> Term. +concurrency(_Config) -> + N = erlang:system_info(schedulers), + + %% Spawn 2*N processes that spin in a tight infinite loop, + %% and one process that will turn on and off local call + %% trace on the infinite_loop/0 function. We expect the + %% emulator to crash if there is a memory barrier bug or + %% if an aligned word-sized write is not atomic. + + Ps0 = [spawn_monitor(fun() -> infinite_loop() end) || + _ <- lists:seq(1, 2*N)], + OnAndOff = fun() -> concurrency_on_and_off() end, + Ps1 = [spawn_monitor(OnAndOff)|Ps0], + ?t:sleep(1000), + + %% Now spawn off N more processes that turn on off and off + %% a local trace pattern. + Ps = [spawn_monitor(OnAndOff) || _ <- lists:seq(1, N)] ++ Ps1, + ?t:sleep(1000), + + %% Clean up. + [exit(Pid, kill) || {Pid,_} <- Ps], + [receive + {'DOWN',Ref,process,Pid,killed} -> ok + end || {Pid,Ref} <- Ps], + erlang:trace_pattern({?MODULE,infinite_loop,0}, false, [local]), + ok. + +concurrency_on_and_off() -> + 1 = erlang:trace_pattern({?MODULE,infinite_loop,0}, true, [local]), + 1 = erlang:trace_pattern({?MODULE,infinite_loop,0}, false, [local]), + concurrency_on_and_off(). + +infinite_loop() -> + infinite_loop(). + %%% Tracee target functions %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% %%% |