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-rw-r--r--lib/crypto/test/crypto_SUITE.erl20
1 files changed, 20 insertions, 0 deletions
diff --git a/lib/crypto/test/crypto_SUITE.erl b/lib/crypto/test/crypto_SUITE.erl
index 025c46aab0..6b7ed06797 100644
--- a/lib/crypto/test/crypto_SUITE.erl
+++ b/lib/crypto/test/crypto_SUITE.erl
@@ -38,6 +38,7 @@ all() ->
mod_pow,
exor,
rand_uniform,
+ rand_threads,
rand_plugin,
rand_plugin_s
].
@@ -605,6 +606,25 @@ rand_uniform(Config) when is_list(Config) ->
10 = byte_size(crypto:strong_rand_bytes(10)).
%%--------------------------------------------------------------------
+rand_threads() ->
+ [{doc, "strong_rand_bytes in parallel threads"}].
+rand_threads(Config) when is_list(Config) ->
+ %% This will crash the emulator on at least one version of libcrypto
+ %% with buggy multithreading in RAND_bytes().
+ %% The test needs to run at least a few minutes...
+ NofThreads = 4,
+ Fun = fun F() -> crypto:strong_rand_bytes(16), F() end,
+ PidRefs = [spawn_monitor(Fun) || _ <- lists:seq(1, NofThreads)],
+%%% The test case takes too much time to run.
+%%% Keep it around for reference by setting it down to just 10 seconds.
+%%% receive after 10 * 60 * 1000 -> ok end, % 10 minutes
+ receive after 10 * 1000 -> ok end, % 10 seconds
+ spawn_link(fun () -> receive after 5000 -> exit(timeout) end end),
+ [exit(Pid, stop) || {Pid,_Ref} <- PidRefs],
+ [receive {'DOWN',Ref,_,_,stop} -> ok end || {_Pid,Ref} <- PidRefs],
+ ok.
+
+%%--------------------------------------------------------------------
rand_plugin() ->
[{doc, "crypto rand plugin testing (implicit state / process dictionary)"}].
rand_plugin(Config) when is_list(Config) ->