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-rw-r--r--lib/kernel/src/erts_debug.erl85
1 files changed, 63 insertions, 22 deletions
diff --git a/lib/kernel/src/erts_debug.erl b/lib/kernel/src/erts_debug.erl
index ef605d0bfe..39308c0043 100644
--- a/lib/kernel/src/erts_debug.erl
+++ b/lib/kernel/src/erts_debug.erl
@@ -3,16 +3,17 @@
%%
%% Copyright Ericsson AB 1999-2013. All Rights Reserved.
%%
-%% The contents of this file are subject to the Erlang Public License,
-%% Version 1.1, (the "License"); you may not use this file except in
-%% compliance with the License. You should have received a copy of the
-%% Erlang Public License along with this software. If not, it can be
-%% retrieved online at http://www.erlang.org/.
-%%
-%% Software distributed under the License is distributed on an "AS IS"
-%% basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See
-%% the License for the specific language governing rights and limitations
-%% under the License.
+%% 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%
%%
@@ -20,7 +21,7 @@
%% Low-level debugging support. EXPERIMENTAL!
--export([size/1,df/1,df/2,df/3]).
+-export([size/1,df/1,df/2,df/3,ic/1]).
%% This module contains the following *experimental* BIFs:
%% disassemble/1
@@ -33,7 +34,7 @@
-export([breakpoint/2, disassemble/1, display/1, dist_ext_to_term/2,
dump_monitors/1, dump_links/1, flat_size/1,
get_internal_state/1, instructions/0, lock_counters/1,
- same/2, set_internal_state/2]).
+ map_info/1, same/2, set_internal_state/2]).
-spec breakpoint(MFA, Flag) -> non_neg_integer() when
MFA :: {Module :: module(),
@@ -114,6 +115,19 @@ get_internal_state(_) ->
instructions() ->
erlang:nif_error(undef).
+-spec ic(F) -> Result when
+ F :: function(),
+ Result :: term().
+
+ic(F) when is_function(F) ->
+ Is0 = erlang:system_info(instruction_counts),
+ R = F(),
+ Is1 = erlang:system_info(instruction_counts),
+ Is = lists:keysort(2,[{I,C1 - C0}||{{I,C1},{I,C0}} <- lists:zip(Is1,Is0)]),
+ _ = [io:format("~12w ~w~n", [C,I])||{I,C}<-Is],
+ io:format("Total: ~w~n",[lists:sum([C||{_I,C}<-Is])]),
+ R.
+
-spec lock_counters(info) -> term();
(clear) -> ok;
({copy_save, boolean()}) -> boolean();
@@ -164,8 +178,10 @@ set_internal_state(_, _) ->
-spec size(term()) -> non_neg_integer().
+-record(s, {seen, maps}).
+
size(Term) ->
- {Sum,_} = size(Term, gb_trees:empty(), 0),
+ {Sum,_} = size(Term, #s{seen=gb_trees:empty(),maps=[]}, 0),
Sum.
size([H|T]=Term, Seen0, Sum0) ->
@@ -209,10 +225,24 @@ tuple_size(I, Sz, Tuple, Seen0, Sum0) ->
tuple_size(I+1, Sz, Tuple, Seen, Sum).
map_size(Map,Seen0,Sum0) ->
- Kt = erts_internal:map_to_tuple_keys(Map),
- Vs = maps:values(Map),
- {Sum1,Seen1} = size(Kt,Seen0,Sum0),
- fold_size(Vs,Seen1,Sum1+length(Vs)+3).
+ %% Danger:
+ %% The internal nodes from erts_internal:map_hashmap_children/1
+ %% is not allowed to leak anywhere. They are only allowed in
+ %% containers (cons cells and tuples, not maps), in gc and
+ %% in erts_debug:same/2
+ case erts_internal:map_type(Map) of
+ flatmap ->
+ Kt = erts_internal:map_to_tuple_keys(Map),
+ Vs = maps:values(Map),
+ {Sum1,Seen1} = size(Kt,Seen0,Sum0),
+ fold_size(Vs,Seen1,Sum1+length(Vs)+3);
+ hashmap ->
+ Cs = erts_internal:map_hashmap_children(Map),
+ fold_size(Cs,Seen0,Sum0+length(Cs)+2);
+ hashmap_node ->
+ Cs = erts_internal:map_hashmap_children(Map),
+ fold_size(Cs,Seen0,Sum0+length(Cs)+1)
+ end.
fun_size(Fun, Seen, Sum) ->
case erlang:fun_info(Fun, type) of
@@ -229,13 +259,18 @@ fold_size([H|T], Seen0, Sum0) ->
fold_size(T, Seen, Sum);
fold_size([], Seen, Sum) -> {Sum,Seen}.
-remember_term(Term, Seen) ->
- case gb_trees:lookup(Term, Seen) of
- none -> gb_trees:insert(Term, [Term], Seen);
+remember_term(Term, #s{maps=Ms}=S) when is_map(Term) ->
+ case is_term_seen(Term, Ms) of
+ false -> S#s{maps=[Term|Ms]};
+ true -> seen
+ end;
+remember_term(Term, #s{seen=T}=S) ->
+ case gb_trees:lookup(Term,T) of
+ none -> S#s{seen=gb_trees:insert(Term,[Term],T)};
{value,Terms} ->
case is_term_seen(Term, Terms) of
- false -> gb_trees:update(Term, [Term|Terms], Seen);
- true -> seen
+ false -> S#s{seen=gb_trees:update(Term,[Term|Terms],T)};
+ true -> seen
end
end.
@@ -313,3 +348,9 @@ cont_dis(File, {Addr,Str,MFA}, MFA) ->
io:put_chars(File, binary_to_list(Str)),
cont_dis(File, erts_debug:disassemble(Addr), MFA);
cont_dis(_, {_,_,_}, _) -> ok.
+
+-spec map_info(Map) -> list() when
+ Map :: map().
+
+map_info(_) ->
+ erlang:nif_error(undef).