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-rw-r--r--lib/dialyzer/src/dialyzer_analysis_callgraph.erl9
-rw-r--r--lib/dialyzer/src/dialyzer_dep.erl21
-rw-r--r--lib/dialyzer/test/small_SUITE_data/src/on_load.erl7
3 files changed, 25 insertions, 12 deletions
diff --git a/lib/dialyzer/src/dialyzer_analysis_callgraph.erl b/lib/dialyzer/src/dialyzer_analysis_callgraph.erl
index 3de020cb01..2a633c5e37 100644
--- a/lib/dialyzer/src/dialyzer_analysis_callgraph.erl
+++ b/lib/dialyzer/src/dialyzer_analysis_callgraph.erl
@@ -172,7 +172,7 @@ analysis_start(Parent, Analysis) ->
throw:{error, _ErrorMsg} = Error -> exit(Error)
end,
NewPlt0 = dialyzer_plt:insert_types(Plt, dialyzer_codeserver:get_records(NewCServer)),
- ExpTypes = dialyzer_codeserver:get_exported_types(NewCServer),
+ ExpTypes = dialyzer_codeserver:get_exported_types(NewCServer),
NewPlt1 = dialyzer_plt:insert_exported_types(NewPlt0, ExpTypes),
State0 = State#analysis_state{plt = NewPlt1},
dump_callgraph(Callgraph, State0, Analysis),
@@ -427,11 +427,8 @@ abs_get_nowarn(Abs, M) ->
false ->
[{M, F, A} || {function, _, F, A, _} <- Abs]; % all functions
true ->
- OnLoad =
- lists:flatten([{M, F, A} || {attribute, _, on_load, {F, A}} <- Abs]),
- OnLoad ++ [{M, F, A} ||
- {nowarn_unused_function, FAs} <- Opts,
- {F, A} <- lists:flatten([FAs])]
+ [{M, F, A} || {nowarn_unused_function, FAs} <- Opts,
+ {F, A} <- lists:flatten([FAs])]
end.
get_exported_types_from_core(Core) ->
diff --git a/lib/dialyzer/src/dialyzer_dep.erl b/lib/dialyzer/src/dialyzer_dep.erl
index 5c1245ae47..f1ac41ff04 100644
--- a/lib/dialyzer/src/dialyzer_dep.erl
+++ b/lib/dialyzer/src/dialyzer_dep.erl
@@ -65,7 +65,7 @@ analyze(Tree) ->
%% io:format("Handling ~w\n", [cerl:atom_val(cerl:module_name(Tree))]),
{_, State} = traverse(Tree, map__new(), state__new(Tree), top),
Esc = state__esc(State),
- %% Add dependency from 'external' to all escaping function
+ %% Add dependency from 'external' to all escaping functions
State1 = state__add_deps(external, output(Esc), State),
Deps = state__deps(State1),
Calls = state__calls(State1),
@@ -486,11 +486,22 @@ all_vars(Tree, AccIn) ->
state__new(Tree) ->
Exports = set__from_list([X || X <- cerl:module_exports(Tree)]),
- InitEsc = set__from_list([cerl_trees:get_label(Fun)
- || {Var, Fun} <- cerl:module_defs(Tree),
- set__is_element(Var, Exports)]),
+ %% get the labels of all exported functions
+ ExpLs = [cerl_trees:get_label(Fun) || {Var, Fun} <- cerl:module_defs(Tree),
+ set__is_element(Var, Exports)],
+ %% make sure to also initiate an analysis from all functions called
+ %% from on_load attributes; in Core these exist as a list of {F,A} pairs
+ OnLoadFAs = lists:flatten([cerl:atom_val(Args)
+ || {Attr, Args} <- cerl:module_attrs(Tree),
+ cerl:atom_val(Attr) =:= on_load]),
+ OnLoadLs = [cerl_trees:get_label(Fun)
+ || {Var, Fun} <- cerl:module_defs(Tree),
+ lists:member(cerl:var_name(Var), OnLoadFAs)],
+ %% init the escaping function labels to exported + called from on_load
+ InitEsc = set__from_list(OnLoadLs ++ ExpLs),
Arities = cerl_trees:fold(fun find_arities/2, dict:new(), Tree),
- #state{deps = map__new(), esc = InitEsc, call = map__new(), arities = Arities, letrecs = map__new()}.
+ #state{deps = map__new(), esc = InitEsc, call = map__new(),
+ arities = Arities, letrecs = map__new()}.
find_arities(Tree, AccMap) ->
case cerl:is_c_fun(Tree) of
diff --git a/lib/dialyzer/test/small_SUITE_data/src/on_load.erl b/lib/dialyzer/test/small_SUITE_data/src/on_load.erl
index 16533a9caa..7242ac2016 100644
--- a/lib/dialyzer/test/small_SUITE_data/src/on_load.erl
+++ b/lib/dialyzer/test/small_SUITE_data/src/on_load.erl
@@ -1,4 +1,6 @@
%%% This is to ensure that "on_load" functions are never reported as unused.
+%%% In addition, all functions called by a function in an on_load attribute
+%%% should be considered as called by an entry point of the module.
-module(on_load).
@@ -8,4 +10,7 @@
foo() -> ok.
-bar() -> ok.
+bar() -> gazonk(17).
+
+gazonk(N) when N < 42 -> gazonk(N+1);
+gazonk(42) -> ok.