diff options
Diffstat (limited to 'lib/kernel/src/erts_debug.erl')
| -rw-r--r-- | lib/kernel/src/erts_debug.erl | 242 |
1 files changed, 218 insertions, 24 deletions
diff --git a/lib/kernel/src/erts_debug.erl b/lib/kernel/src/erts_debug.erl index b8871e0d45..7b3f1e313a 100644 --- a/lib/kernel/src/erts_debug.erl +++ b/lib/kernel/src/erts_debug.erl @@ -1,18 +1,19 @@ %% %% %CopyrightBegin% %% -%% Copyright Ericsson AB 1999-2012. All Rights Reserved. +%% Copyright Ericsson AB 1999-2016. 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 @@ -28,6 +29,161 @@ %% same/2 %% flat_size/1 +%%% BIFs + +-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, + map_info/1, same/2, set_internal_state/2, + size_shared/1, copy_shared/1]). + +-spec breakpoint(MFA, Flag) -> non_neg_integer() when + MFA :: {Module :: module(), + Function :: atom(), + Arity :: arity() | '_'}, + Flag :: boolean(). + +breakpoint(_, _) -> + erlang:nif_error(undef). + +-spec disassemble(What) -> false | undef | Result when + What :: MFA | Address, + Result :: {Address, Code, MFA}, + MFA :: mfa(), + Address :: non_neg_integer(), + Code :: binary(). + +disassemble(_) -> + erlang:nif_error(undef). + +-spec display(Term) -> string() when + Term :: term(). + +display(_) -> + erlang:nif_error(undef). + +-spec dist_ext_to_term(Tuple, Binary) -> term() when + Tuple :: tuple(), + Binary :: binary(). + +dist_ext_to_term(_, _) -> + erlang:nif_error(undef). + +-spec dump_monitors(Id) -> true when + Id :: pid() | atom(). + +dump_monitors(_) -> + erlang:nif_error(undef). + +-spec dump_links(Id) -> true when + Id :: pid() | port() | atom(). + +dump_links(_) -> + erlang:nif_error(undef). + +-spec flat_size(Term) -> non_neg_integer() when + Term :: term(). + +flat_size(_) -> + erlang:nif_error(undef). + +-spec size_shared(Term) -> non_neg_integer() when + Term :: term(). + +size_shared(_) -> + erlang:nif_error(undef). + +-spec copy_shared(Term) -> term() when + Term :: term(). + +copy_shared(_) -> + erlang:nif_error(undef). + +-spec get_internal_state(W) -> term() when + W :: reds_left | node_and_dist_references | monitoring_nodes + | next_pid | 'DbTable_words' | check_io_debug + | process_info_args | processes | processes_bif_info + | max_atom_out_cache_index | nbalance | available_internal_state + | force_heap_frags | memory + | {process_status, pid()} + | {link_list, pid() | port() | node()} + | {monitor_list, pid() | node()} + | {channel_number, non_neg_integer()} + | {have_pending_exit, pid() | port() | atom()} + | {binary_info, binary()} + | {term_to_binary_no_funs, term()} + | {dist_port, port()} + | {atom_out_cache_index, atom()} + | {fake_scheduler_bindings, + default_bind | spread | processor_spread | thread_spread + | thread_no_node_processor_spread | no_node_processor_spread + | no_node_thread_spread | no_spread | unbound} + | {reader_groups_map, non_neg_integer()}. + +get_internal_state(_) -> + erlang:nif_error(undef). + +-spec instructions() -> [string()]. + +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(); + ({process_locks, boolean()}) -> boolean(). + +lock_counters(_) -> + erlang:nif_error(undef). + +-spec same(Term1, Term2) -> boolean() when + Term1 :: term(), + Term2 :: term(). + +same(_, _) -> + erlang:nif_error(undef). + +-spec set_internal_state(available_internal_state, boolean()) -> boolean(); + (reds_left, non_neg_integer()) -> true; + (block, non_neg_integer()) -> true; + (sleep, non_neg_integer()) -> true; + (block_scheduler, non_neg_integer()) -> true; + (next_pid, non_neg_integer()) -> false | integer(); + (force_gc, pid() | atom()) -> boolean(); + (send_fake_exit_signal, {pid() | port(), pid(), term()}) -> dead | message | unaffected | exit; + (colliding_names, {atom(), non_neg_integer()}) -> + [atom()]; + (binary_loop_limit, default) -> -1; + (binary_loop_limit, non_neg_integer()) -> non_neg_integer(); + (re_loop_limit, default) -> -1; + (re_loop_limit, non_neg_integer()) -> non_neg_integer(); + (unicode_loop_limit, default) -> -1; + (unicode_loop_limit, non_neg_integer()) -> non_neg_integer(); + (hipe_test_reschedule_suspend, term()) -> nil(); + (hipe_test_reschedule_resume, pid() | port()) -> boolean(); + (test_long_gc_sleep, non_neg_integer()) -> true; + (kill_dist_connection, port()) -> boolean(); + (not_running_optimization, boolean()) -> boolean(); + (wait, deallocations) -> ok. + +set_internal_state(_, _) -> + erlang:nif_error(undef). + +%%% End of BIFs + %% size(Term) %% Returns the size of Term in actual heap words. Shared subterms are %% counted once. Example: If A = [a,b], B =[A,A] then size(B) returns 8, @@ -35,8 +191,10 @@ -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) -> @@ -53,6 +211,11 @@ size(Tuple, Seen0, Sum0) when is_tuple(Tuple) -> Sum = Sum0 + 1 + tuple_size(Tuple), tuple_size(1, tuple_size(Tuple), Tuple, Seen, Sum) end; +size(Map, Seen0, Sum) when is_map(Map) -> + case remember_term(Map, Seen0) of + seen -> {Sum,Seen0}; + Seen -> map_size(Map, Seen, Sum) + end; size(Fun, Seen0, Sum) when is_function(Fun) -> case remember_term(Fun, Seen0) of seen -> {Sum,Seen0}; @@ -74,6 +237,26 @@ tuple_size(I, Sz, Tuple, Seen0, Sum0) -> {Sum,Seen} = size(element(I, Tuple), Seen0, Sum0), tuple_size(I+1, Sz, Tuple, Seen, Sum). +map_size(Map,Seen0,Sum0) -> + %% 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:term_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 {type,external} -> @@ -81,21 +264,26 @@ fun_size(Fun, Seen, Sum) -> {type,local} -> Sz = erts_debug:flat_size(fun() -> ok end), {env,Env} = erlang:fun_info(Fun, env), - fun_size_1(Env, Seen, Sum+Sz+length(Env)) + fold_size(Env, Seen, Sum+Sz+length(Env)) end. -fun_size_1([H|T], Seen0, Sum0) -> +fold_size([H|T], Seen0, Sum0) -> {Sum,Seen} = size(H, Seen0, Sum0), - fun_size_1(T, Seen, Sum); -fun_size_1([], Seen, Sum) -> {Sum,Seen}. - -remember_term(Term, Seen) -> - case gb_trees:lookup(Term, Seen) of - none -> gb_trees:insert(Term, [Term], Seen); + fold_size(T, Seen, Sum); +fold_size([], Seen, Sum) -> {Sum,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. @@ -159,7 +347,7 @@ dff(Name, Fs) when is_list(Name) -> try dff(F, Fs) after - file:close(F) + _ = file:close(F) end; {error,Reason} -> {error,{badopen,Reason}} @@ -173,3 +361,9 @@ 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). |