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%%
%% %CopyrightBegin%
%%
%% Copyright Ericsson AB 2007-2024. 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(crashdump_helper).
%% Prior to OTP 26, maybe_expr used to require runtime support. As it's now
%% enabled by default, all modules are tagged with the feature even when they
%% don't use it. Therefore, we explicitly disable it until OTP 25 is out of
%% support.
-feature(maybe_expr, disable).
-compile(r24).
-export([n1_proc/2,remote_proc/2,
dump_maps/0,create_maps/0,
create_binaries/0,create_sub_binaries/1,
dump_persistent_terms/0,
create_persistent_terms/0,
dump_global_literals/0]).
-include_lib("common_test/include/ct.hrl").
n1_proc(N2,Creator) ->
spawn(fun() -> n1_proc(Creator,N2,x,y,[]) end).
n1_proc(Creator,N2,Pid2,Port2,L) when Pid2==x;length(L)<2->
receive
{N2,Pid,Port} ->
n1_proc(Creator,N2,Pid,Port,L);
P ->
n1_proc(Creator,N2,Pid2,Port2,[P|L])
end;
n1_proc(Creator,N2,Pid2,Port2,_L) ->
register(aaaaaaaa,self()),
process_flag(save_calls,3),
ets:new(cdv_test_ordset_table,[ordered_set]),
erlang:send_after(1000000,self(),cdv_test_timer_message1),
erlang:send_after(1000000,aaaaaaaa,cdv_test_timer_message2),
erlang:send_after(1000000,noexistproc,cdv_test_timer_message3),
Port = hd(erlang:ports()),
Fun = fun() -> ok end,
Ref = make_ref(),
Pid = self(),
Bin = list_to_binary(lists:seq(1, 255)),
<<_:2,SubBin:65/binary,_/bits>> = Bin,
register(named_port,Port),
%% Dictionary
put(list,"list"),
put(atom,atom),
put(integer,42),
put(float,54.654),
put(big_float,math:pow(2,1023)),
put(tuple,{1,2,{}}),
put(port,Port),
put('fun',Fun),
put(ref,Ref),
put(pid,Pid),
put(bin,Bin),
put(proc_bins,create_proc_bins()),
put(bins,create_binaries()),
put(sub_bin,SubBin),
put(sub_bins,create_sub_binaries(get(bins))),
put(bignum,83974938738373873),
put(neg_bignum,-38748762783736367),
put(ext_pid,Pid2),
put(ext_port,Port2),
%% Message queue
L = lists:seq(0,255),
BigMsg = {message,list_to_binary(L),L},
Port = hd(erlang:ports()),
self() ! {short,message,1,2.5,"hello world",Port,{}},
self() ! BigMsg,
OtherPid = spawn(fun() -> register(aaaaaaab,self()),
receive after infinity -> ok end
end),
link(OtherPid), % own node
link(Pid2), % external node
erlang:monitor(process,OtherPid),
erlang:monitor(process,init), % named process
erlang:monitor(process,Pid2),
monitor_node(N2, true),
code:load_file(?MODULE),
Creator ! {self(),done},
receive after infinity -> ok end.
remote_proc(P1,Creator) ->
spawn(fun() ->
P1 ! {node(),self(),hd(erlang:ports())},
Creator ! {self(),done},
receive after infinity -> ok end
end).
create_binaries() ->
Sizes = lists:seq(100, 120) ++ lists:seq(200, 240),
[begin
<<H:16/unit:8>> = erlang:md5(<<Size:32>>),
Data = ((H bsl (8*150)) div (H+7919)),
<<Data:Size/unit:8>>
end || Size <- Sizes].
create_sub_binaries(Bins) ->
[create_sub_binary(Bin, Start, LenSub) ||
Bin <- Bins,
Start <- [0,1,2,3,4,5,10,22],
LenSub <- [0,1,2,3,4,6,9,65]].
create_sub_binary(Bin, Start, LenSub) ->
Len = byte_size(Bin) - LenSub - Start,
<<_:Start/bytes,Sub:Len/bytes,_/bytes>> = Bin,
Sub.
create_proc_bins() ->
Parent = self(),
Pid =
spawn(
fun() ->
%% Just reverse the list here, so this binary is not
%% confused with the one created in n1_proc/5 above,
%% which is used for testing truncation (see
%% crashdump_viewer_SUITE:truncate_dump_binary/1)
Bin = list_to_binary(lists:reverse(lists:seq(1, 255))),
<<A:65/bytes,B:65/bytes,C/bytes>> = Bin,
Parent ! {self(),{A,B,C}}
end),
receive
{Pid,ProcBins} -> ProcBins
end.
%%%
%%% Test dumping of maps. Dumping of maps only from OTP 20.2.
%%%
dump_maps() ->
Parent = self(),
F = fun() ->
register(aaaaaaaa_maps, self()),
put(maps, create_maps()),
Parent ! {self(),done},
receive _ -> ok end
end,
Pid = spawn_link(F),
receive
{Pid,done} ->
unlink(Pid),
{ok,Pid}
end.
create_maps() ->
Map0 = maps:from_list([{I,[I,I+1]} || I <- lists:seq(1, 40)]),
Map1 = maps:from_list([{I,{a,[I,I*I],{}}} || I <- lists:seq(1, 100)]),
Map2 = maps:from_list([{{I},(I*I) bsl 24} || I <- lists:seq(1, 10000)]),
Map3 = lists:foldl(fun(I, A) ->
A#{I=>I*I}
end, Map2, lists:seq(-10, 0)),
#{a=>Map0,b=>Map1,c=>Map2,d=>Map3,e=>#{},literal=>literal_map()}.
literal_map() ->
%% A literal map such as the one below will produce a heap dump
%% like this:
%%
%% Address1:t4:H<Address3>,H<Address4>,H<Address5>,H<Address6>
%% Address2:Mf4:H<Adress1>:I1,I2,I3,I4
%% Address3: ... % "one"
%% Address4: ... % "two"
%% Address5: ... % "three"
%% Address6: ... % "four"
%%
%% The map cannot be reconstructed in a single sequential pass.
%%
%% To reconstruct the map, first the string keys "one"
%% through "four" must be reconstructed, then the tuple at
%% Adress1, then the map at Address2.
#{"one"=>1,"two"=>2,"three"=>3,"four"=>4}.
%%%
%%% Test dumping of persistent terms (from OTP 21.2).
%%%
dump_persistent_terms() ->
Parent = self(),
F = fun() ->
register(aaaaaaaa_persistent_terms, self()),
put(pts, create_persistent_terms()),
Parent ! {self(),done},
receive _ -> ok end
end,
Pid = spawn_link(F),
receive
{Pid,done} ->
unlink(Pid),
{ok,Pid}
end.
create_persistent_terms() ->
persistent_term:put({?MODULE,first}, {pid,42.0}),
persistent_term:put({?MODULE,second}, [1,2,3]),
{persistent_term:get({?MODULE,first}),persistent_term:get({?MODULE,second})}.
%%%
%%% Test dumping of global literals such as the tuple returned from os:type/0
%%% (from OTP 23.1).
%%%
dump_global_literals() ->
Parent = self(),
F = fun() ->
register(aaaaaaaa_global_literals, self()),
put(global_literals, {os:type(),os:version()}),
Parent ! {self(),done},
receive _ -> ok end
end,
Pid = spawn_link(F),
receive
{Pid,done} ->
unlink(Pid),
{ok,Pid}
end.
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