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-rw-r--r--lib/kernel/src/erts_debug.erl20
1 files changed, 20 insertions, 0 deletions
diff --git a/lib/kernel/src/erts_debug.erl b/lib/kernel/src/erts_debug.erl
index b3d54ddc1d..6654cd9ee7 100644
--- a/lib/kernel/src/erts_debug.erl
+++ b/lib/kernel/src/erts_debug.erl
@@ -182,6 +182,11 @@ 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(Fun, Seen0, Sum) when is_function(Fun) ->
+ case remember_term(Fun, Seen0) of
+ seen -> {Sum,Seen0};
+ Seen -> fun_size(Fun, Seen, Sum)
+ end;
size(Term, Seen0, Sum) ->
case erts_debug:flat_size(Term) of
0 -> {Sum,Seen0};
@@ -197,6 +202,21 @@ tuple_size(I, Sz, _, Seen, Sum) when I > Sz ->
tuple_size(I, Sz, Tuple, Seen0, Sum0) ->
{Sum,Seen} = size(element(I, Tuple), Seen0, Sum0),
tuple_size(I+1, Sz, Tuple, Seen, Sum).
+
+fun_size(Fun, Seen, Sum) ->
+ case erlang:fun_info(Fun, type) of
+ {type,external} ->
+ {Sum + erts_debug:flat_size(Fun),Seen};
+ {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))
+ end.
+
+fun_size_1([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