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authorBjörn Gustavsson <[email protected]>2015-09-02 16:29:46 +0200
committerBjörn Gustavsson <[email protected]>2015-09-11 12:24:35 +0200
commitee12ac8b4134fad989a8fa3cfb58e8ec90002665 (patch)
tree21808d15282caf8f942df59979451d8d31f15d3c /lib/stdlib/test/proc_lib_SUITE.erl
parentbd0b4805862c722807765396711d3e1e7ccbbd57 (diff)
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proc_lib: Improve coverage for crash/1
First refactor the entire test case using helper functions to facilitate further maintenance. Then test that proc_lib can handle that the process dictionary has been erased (that will cover more code in proc_lib). We can also shave off 2 seconds of the execution time by testing the 'shutdown' exit reasons at beginning of the test case instead of doing it at the end.
Diffstat (limited to 'lib/stdlib/test/proc_lib_SUITE.erl')
-rw-r--r--lib/stdlib/test/proc_lib_SUITE.erl174
1 files changed, 108 insertions, 66 deletions
diff --git a/lib/stdlib/test/proc_lib_SUITE.erl b/lib/stdlib/test/proc_lib_SUITE.erl
index 857cd3f88d..f7a6a38138 100644
--- a/lib/stdlib/test/proc_lib_SUITE.erl
+++ b/lib/stdlib/test/proc_lib_SUITE.erl
@@ -80,81 +80,123 @@ end_per_group(_GroupName, Config) ->
crash(Config) when is_list(Config) ->
error_logger:add_report_handler(?MODULE, self()),
- Pid = proc_lib:spawn(?MODULE, sp1, []),
- Pid ! die,
- ?line Report = receive
- {crash_report, Pid, Report0} -> Report0
- after 2000 -> test_server:fail(no_crash_report)
- end,
- ?line proc_lib:format(Report),
- ?line [PidRep, []] = Report,
- ?line {value, {initial_call,{?MODULE,sp1,[]}}} =
- lists:keysearch(initial_call, 1, PidRep),
- Self = self(),
- ?line {value, {ancestors,[Self]}} =
- lists:keysearch(ancestors, 1, PidRep),
- ?line {value, {error_info,{exit,die,_StackTrace1}}} =
- lists:keysearch(error_info, 1, PidRep),
-
- F = fun sp1/0,
- Pid1 = proc_lib:spawn(node(), F),
- Pid1 ! die,
- ?line [PidRep1, []] = receive
- {crash_report, Pid1, Report1} -> Report1
- after 2000 -> test_server:fail(no_crash_report)
- end,
- ?line {value, {initial_call,{Fmod,Fname,[]}}} =
- lists:keysearch(initial_call, 1, PidRep1),
- ?line {module,Fmod} = erlang:fun_info(F, module),
- ?line {name,Fname} = erlang:fun_info(F, name),
- ?line {value, {ancestors,[Self]}} =
- lists:keysearch(ancestors, 1, PidRep1),
- ?line {value, {error_info,{exit,die,_StackTrace2}}} =
- lists:keysearch(error_info, 1, PidRep1),
-
- Pid2 = proc_lib:spawn(?MODULE, sp2, []),
- test_server:sleep(100),
- ?line {?MODULE,sp2,[]} = proc_lib:initial_call(Pid2),
- ?line {?MODULE,sp2,0} = proc_lib:translate_initial_call(Pid2),
- Pid2 ! die,
- ?line [Pid2Rep, [{neighbour, LinkRep}]] =
- receive
- {crash_report, Pid2, Report2} -> Report2
- after 2000 -> test_server:fail(no_crash_report)
- end,
- ?line {value, {initial_call,{?MODULE,sp2,[]}}} =
- lists:keysearch(initial_call, 1, Pid2Rep),
- ?line {value, {ancestors,[Self]}} =
- lists:keysearch(ancestors, 1, Pid2Rep),
- ?line {value, {error_info,{exit,die,_StackTrace3}}} =
- lists:keysearch(error_info, 1, Pid2Rep),
- ?line {value, {initial_call,{?MODULE,sp1,[]}}} =
- lists:keysearch(initial_call, 1, LinkRep),
-
%% Make sure that we don't get a crash report if a process
%% terminates with reason 'shutdown' or reason {shutdown,Reason}.
- ?line process_flag(trap_exit, true),
- ?line Pid3 = proc_lib:spawn_link(erlang, apply,
- [fun() -> exit(shutdown) end,[]]),
-
- ?line Pid4 = proc_lib:spawn_link(erlang, apply,
- [fun() -> exit({shutdown,{a,b,c}}) end,[]]),
+ process_flag(trap_exit, true),
+ Pid0 = proc_lib:spawn_link(erlang, apply,
+ [fun() -> exit(shutdown) end,[]]),
+ Pid1 = proc_lib:spawn_link(erlang, apply,
+ [fun() -> exit({shutdown,{a,b,c}}) end,[]]),
+
+ receive {'EXIT',Pid0,shutdown} -> ok end,
+ receive {'EXIT',Pid1,{shutdown,{a,b,c}}} -> ok end,
+ process_flag(trap_exit, false),
+ %% We expect any unexpected messages to be caught below,
+ %% so we don't have explicitly wait some time to be sure.
+
+ %% Spawn export function.
+ Pid2 = proc_lib:spawn(?MODULE, sp1, []),
+ Pid2 ! die,
+ Exp2 = [{initial_call,{?MODULE,sp1,[]}},
+ {ancestors,[self()]},
+ {error_info,{exit,die,{stacktrace}}}],
+ analyse_crash(Pid2, Exp2, []),
- ?line receive {'EXIT',Pid3,shutdown} -> ok end,
- ?line receive {'EXIT',Pid4,{shutdown,{a,b,c}}} -> ok end,
- ?line process_flag(trap_exit, false),
+ %% Spawn fun.
+ F = fun sp1/0,
+ Pid3 = proc_lib:spawn(node(), F),
+ Pid3 ! die,
+ {module,?MODULE} = erlang:fun_info(F, module),
+ {name,Fname} = erlang:fun_info(F, name),
+ Exp3 = [{initial_call,{?MODULE,Fname,[]}},
+ {ancestors,[self()]},
+ {error_info,{exit,die,{stacktrace}}}],
+ analyse_crash(Pid3, Exp3, []),
- receive
- Any ->
- ?line ?t:fail({unexpected_message,Any})
- after 2000 ->
- ok
- end,
+ %% Spawn function with neighbour.
+ Pid4 = proc_lib:spawn(?MODULE, sp2, []),
+ test_server:sleep(100),
+ {?MODULE,sp2,[]} = proc_lib:initial_call(Pid4),
+ {?MODULE,sp2,0} = proc_lib:translate_initial_call(Pid4),
+ Pid4 ! die,
+ Exp4 = [{initial_call,{?MODULE,sp2,[]}},
+ {ancestors,[self()]},
+ {error_info,{exit,die,{stacktrace}}}],
+ Links4 = [[{initial_call,{?MODULE,sp1,[]}},
+ {ancestors,[Pid4,self()]}]],
+ analyse_crash(Pid4, Exp4, Links4),
+
+ %% Make sure that we still get a crash report if the
+ %% process dictionary have been tampered with.
+
+ Pid5 = proc_lib:spawn(erlang, apply,
+ [fun() ->
+ erase(),
+ exit(abnormal)
+ end,[]]),
+ Exp5 = [{initial_call,absent},
+ {ancestors,[]},
+ {error_info,{exit,abnormal,{stacktrace}}}],
+ analyse_crash(Pid5, Exp5, []),
error_logger:delete_report_handler(?MODULE),
ok.
+analyse_crash(Pid, Expected0, ExpLinks) ->
+ Expected = [{pid,Pid}|Expected0],
+ receive
+ {crash_report, Pid, Report} ->
+ _ = proc_lib:format(Report), %Smoke test.
+ [Crash,Links] = Report,
+ analyse_crash_1(Expected, Crash),
+ analyse_links(ExpLinks, Links);
+ Unexpected ->
+ io:format("~p\n", [Unexpected]),
+ test_server:fail(unexpected_message)
+ after 5000 ->
+ test_server:fail(no_crash_report)
+ end.
+
+analyse_links([H|Es], [{neighbour,N}|Links]) ->
+ analyse_crash_1(H, N),
+ analyse_links(Es, Links);
+analyse_links([], []) ->
+ ok.
+analyse_crash_1([{Key,absent}|T], Report) ->
+ false = lists:keymember(Key, 1, Report),
+ analyse_crash_1(T, Report);
+analyse_crash_1([{Key,Pattern}|T], Report) ->
+ case lists:keyfind(Key, 1, Report) of
+ false ->
+ io:format("~p", [Report]),
+ test_server:fail({missing_key,Key});
+ {Key,Info} ->
+ try
+ match_info(Pattern, Info)
+ catch
+ no_match ->
+ io:format("key: ~p", [Key]),
+ io:format("pattern: ~p", [Pattern]),
+ io:format("actual: ~p", [Report]),
+ test_server:fail(no_match)
+ end,
+ analyse_crash_1(T, Report)
+ end;
+analyse_crash_1([], _Report) ->
+ [].
+
+match_info(T, T) ->
+ ok;
+match_info({stacktrace}, Stk) when is_list(Stk) ->
+ ok;
+match_info([H1|T1], [H2|T2]) ->
+ match_info(H1, H2),
+ match_info(T1, T2);
+match_info(Tuple1, Tuple2) when tuple_size(Tuple1) =:= tuple_size(Tuple2) ->
+ match_info(tuple_to_list(Tuple1), tuple_to_list(Tuple2));
+match_info(_, _) ->
+ throw(no_match).
sync_start_nolink(Config) when is_list(Config) ->
_Pid = spawn_link(?MODULE, sp5, [self()]),