%%
%% %CopyrightBegin%
%%
%% Copyright Ericsson AB 2007-2016. 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(nofrag_SUITE).
-include_lib("common_test/include/ct.hrl").
-export([all/0, suite/0,
error_handler/1,error_handler_apply/1,
error_handler_fixed_apply/1,error_handler_fun/1,
debug_breakpoint/1]).
%% Exported functions for an error_handler module.
-export([undefined_function/3,undefined_lambda/3,breakpoint/3]).
suite() ->
[{ct_hooks,[ts_install_cth]},
{timetrap, {minutes, 3}}].
all() ->
[error_handler, error_handler_apply,
error_handler_fixed_apply, error_handler_fun,
debug_breakpoint].
error_handler(Config) when is_list(Config) ->
process_flag(error_handler, ?MODULE),
%% The term_to_binary/1 - binary_to_term/1 roundtrip is a good way
%% to traverse the entire term.
Term = collect(1024),
Term = binary_to_term(term_to_binary(Term)),
1024 = length(Term),
[[a,b,c,d,[e,f,g]]] = lists:usort(Term),
ok.
collect(0) ->
[];
collect(N) ->
%% The next line calls the error handle function, which is
%% ?MODULE:undefined_function/3 (it simply returns the list
%% of args, i.e. [a,b,c,d,[e,f,g]]).
C = fooblurf:x(a, b, c, d, [e,f,id(g)]),
%% The variable C will be saved onto the stack frame; if C
%% points into a heap fragment the garbage collector will reach
%% it and the emulator will crash sooner or later (sooner if
%% the emulator is debug-compiled).
Res = collect(N-1),
[C|Res].
collect_apply(0, _) ->
[];
collect_apply(N, Mod) ->
%% The next line calls the error handle function, which is
%% ?MODULE:undefined_function/3 (it simply returns the list
%% of args).
C = apply(Mod, xyz, id([{a,id(42)},b,c,d,[e,f,id(g)]])),
%% The variable C will be saved onto the stack frame; if C
%% points into a heap fragment the garbage collector will reach
%% it and the emulator will crash sooner or later (sooner if
%% the emulator is debug-compiled).
Res = collect_apply(N-1, Mod),
[C|Res].
error_handler_apply(Config) when is_list(Config) ->
process_flag(error_handler, ?MODULE),
%% The term_to_binary/1 - binary_to_term/1 roundtrip is a good way
%% to traverse the entire term.
Term = collect_apply(1024, fooblurfbar),
Term = binary_to_term(term_to_binary(Term)),
1024 = length(Term),
[[{a,42},b,c,d,[e,f,g]]] = lists:usort(Term),
ok.
error_handler_fixed_apply(Config) when is_list(Config) ->
process_flag(error_handler, ?MODULE),
%% The term_to_binary/1 - binary_to_term/1 roundtrip is a good way
%% to traverse the entire term.
Term = collect_fixed_apply(1024, fooblurfbar),
Term = binary_to_term(term_to_binary(Term)),
1024 = length(Term),
[[{a,2},b,c,d,[e,f,g]]] = lists:usort(Term),
ok.
collect_fixed_apply(0, _) ->
[];
collect_fixed_apply(N, Mod) ->
%% The next line calls the error handle function, which is
%% ?MODULE:undefined_function/3 (it simply returns the list
%% of args).
C = Mod:x({a,id(2)}, b, c, d, [e,f,id(g)]),
%% The variable C will be saved onto the stack frame; if C
%% points into a heap fragment the garbage collector will reach
%% it and the emulator will crash sooner or later (sooner if
%% the emulator is debug-compiled).
Res = collect_fixed_apply(N-1, Mod),
[C|Res].
undefined_function(_Mod, _Name, Args) ->
Args.
error_handler_fun(Config) when is_list(Config) ->
process_flag(error_handler, ?MODULE),
%% fun(A, B, C) -> {A,B,C,X} end in module foobarblurf.
B = <<131,112,0,0,0,84,3,109,96,69,208,5,175,207,75,36,93,112,218,232,222,22,251,0,
0,0,0,0,0,0,1,100,0,11,102,111,111,98,97,114,98,108,117,114,102,97,0,98,5,
244,197,144,103,100,0,13,110,111,110,111,100,101,64,110,111,104,111,115,116,
0,0,0,46,0,0,0,0,0,104,3,97,1,97,2,97,3>>,
Fun = binary_to_term(B),
Term = collect_fun(1024, Fun),
Term = binary_to_term(term_to_binary(Term)),
1024 = length(Term),
[[{foo,bar},{99,1.0},[e,f,g]]] = lists:usort(Term),
{env,[{1,2,3}]} = erlang:fun_info(Fun, env),
ok.
collect_fun(0, _) ->
[];
collect_fun(N, Fun) ->
%% The next line calls the error handle function, which is
%% ?MODULE:undefined_lambda/3 (it simply returns the list
%% of args).
C = Fun({foo,id(bar)}, {99,id(1.0)}, [e,f,id(g)]),
%% The variable C will be saved onto the stack frame; if C
%% points into a heap fragment the garbage collector will reach
%% it and the emulator will crash sooner or later (sooner if
%% the emulator is debug-compiled).
Res = collect_fun(N-1, Fun),
[C|Res].
undefined_lambda(foobarblurf, Fun, Args) when is_function(Fun) ->
Args.
debug_breakpoint(Config) when is_list(Config) ->
process_flag(error_handler, ?MODULE),
erts_debug:breakpoint({?MODULE,foobar,5}, true),
Term = break_collect(1024),
Term = binary_to_term(term_to_binary(Term)),
1024 = length(Term),
[[a,b,c,{d,e},[f,g,h]]] = lists:usort(Term),
erts_debug:breakpoint({?MODULE,foobar,5}, false),
ok.
break_collect(0) ->
[];
break_collect(N) ->
C = foobar(a, b, c, {id(d),e}, [f,g,id(h)]),
Res = break_collect(N-1),
[C|Res].
breakpoint(?MODULE, foobar, Args) ->
Args.
foobar(_, _, _, _, _) ->
exit(dont_execute_me).
id(I) -> I.
