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authorHans Bolinder <[email protected]>2015-03-31 10:22:39 +0200
committerHans Bolinder <[email protected]>2015-04-01 09:57:55 +0200
commit31a445925408bdeea5d1b157d39756b5b7b1b165 (patch)
tree546547fd09ac58dc928d0eb7944d314c61ca308f /lib/dialyzer/test
parentaa13ab92a4bc99bffdb1576690d1b62be8d34e4a (diff)
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dialyzer: Update the PLT properly when a module is changed
Thanks to James Fish for the bug report, and to Stavros Aronis for fixing the bug.
Diffstat (limited to 'lib/dialyzer/test')
-rw-r--r--lib/dialyzer/test/plt_SUITE.erl64
1 files changed, 61 insertions, 3 deletions
diff --git a/lib/dialyzer/test/plt_SUITE.erl b/lib/dialyzer/test/plt_SUITE.erl
index aee9f449a6..0b8c6dec21 100644
--- a/lib/dialyzer/test/plt_SUITE.erl
+++ b/lib/dialyzer/test/plt_SUITE.erl
@@ -1,17 +1,17 @@
%% This suite is the only hand made and simply
-%% checks if we can build a plt.
+%% checks if we can build and update a plt.
-module(plt_SUITE).
-include_lib("common_test/include/ct.hrl").
-include("dialyzer_test_constants.hrl").
--export([suite/0, all/0, build_plt/1]).
+-export([suite/0, all/0, build_plt/1, update_plt/1]).
suite() ->
[{timetrap, ?plt_timeout}].
-all() -> [build_plt].
+all() -> [build_plt, update_plt].
build_plt(Config) ->
OutDir = ?config(priv_dir, Config),
@@ -19,3 +19,61 @@ build_plt(Config) ->
ok -> ok;
fail -> ct:fail(plt_build_fail)
end.
+
+%%% [James Fish:]
+%%% If a function is removed from a module and the module has previously
+%%% been added to a PLT, the function will not be removed from PLT when
+%%% the PLT is checked. This results in dialyzer failing to produce a
+%%% callgraph warning when doing success typings analysis if the remove
+%%% function is still called in another module
+%%% As the function is not removed from the PLT a prior warning, such as a
+%%% contract types warning, might be emitted when the removed function
+%%% nolonger exists.
+update_plt(Config) ->
+ PrivDir = ?config(priv_dir, Config),
+ Prog1 = <<"-module(plt_gc).
+ -export([one/0]).
+ one() ->
+ one.">>,
+ {ok, Beam} = compile(Config, Prog1, plt_gc, []),
+
+ ErlangBeam = case code:where_is_file("erlang.beam") of
+ non_existing ->
+ filename:join([code:root_dir(),
+ "erts", "preloaded", "ebin",
+ "erlang.beam"]);
+ EBeam ->
+ EBeam
+ end,
+ Plt = filename:join(PrivDir, "plt_gc.plt"),
+ Opts = [{check_plt, true}, {from, byte_code}],
+ [] = dialyzer:run([{analysis_type, plt_build},
+ {files, [Beam, ErlangBeam]},
+ {output_plt, Plt}] ++ Opts),
+
+ Prog2 = <<"-module(plt_gc).
+ -export([two/0]).
+ two() ->
+ two.">>,
+ {ok, Beam} = compile(Config, Prog2, plt_gc, []),
+
+ Test = <<"-module(test).
+ -export([test/0]).
+ -spec test() -> test.
+ test() ->
+ plt_gc:one().">>,
+ {ok, TestBeam} = compile(Config, Test, test, []),
+ [{warn_callgraph, _, {call_to_missing, [plt_gc, one, 0]}}] =
+ dialyzer:run([{analysis_type, succ_typings},
+ {files, [TestBeam]},
+ {init_plt, Plt}] ++ Opts),
+ ok.
+
+compile(Config, Prog, Module, CompileOpts) ->
+ Source = lists:concat([Module, ".erl"]),
+ PrivDir = ?config(priv_dir,Config),
+ Filename = filename:join([PrivDir, Source]),
+ ok = file:write_file(Filename, Prog),
+ Opts = [{outdir, PrivDir}, debug_info | CompileOpts],
+ {ok, Module} = compile:file(Filename, Opts),
+ {ok, filename:join([PrivDir, lists:concat([Module, ".beam"])])}.