diff --git a/c_src/quicer_ctx.c b/c_src/quicer_ctx.c
index 43f85280..45e7adf6 100644
--- a/c_src/quicer_ctx.c
+++ b/c_src/quicer_ctx.c
@@ -437,3 +437,18 @@ cleanup_owner_signals(QuicerStreamCTX *s_ctx)
   OwnerSignalQueueDestroy(s_ctx->sig_queue);
   s_ctx->sig_queue = NULL;
 }
+
+ERL_NIF_TERM
+copy_stream_handle(ErlNifEnv *env,
+                   __unused_parm__ int argc,
+                   const ERL_NIF_TERM argv[])
+{
+  QuicerStreamCTX *ctx = NULL;
+  if (!enif_get_resource(env, argv[0], ctx_stream_t, (void **)&ctx))
+    {
+      return enif_make_badarg(env);
+    }
+  assert(ctx != NULL);
+  enif_make_copy(ctx->env, ctx->eHandle);
+  return ATOM_OK;
+}
diff --git a/c_src/quicer_ctx.h b/c_src/quicer_ctx.h
index 9482ed93..9068566d 100644
--- a/c_src/quicer_ctx.h
+++ b/c_src/quicer_ctx.h
@@ -202,4 +202,7 @@ void cache_stream_id(QuicerStreamCTX *s_ctx);
 
 void cleanup_owner_signals(QuicerStreamCTX *s_ctx);
 
+ERL_NIF_TERM
+copy_stream_handle(ErlNifEnv *env, int argc, const ERL_NIF_TERM argv[]);
+
 #endif // __QUICER_CTX_H_
diff --git a/c_src/quicer_nif.c b/c_src/quicer_nif.c
index 4cbd8b93..45309b21 100644
--- a/c_src/quicer_nif.c
+++ b/c_src/quicer_nif.c
@@ -21,6 +21,10 @@ limitations under the License.
 #include "quicer_listener.h"
 #include "quicer_vsn.h"
 
+#if defined(__linux__)
+#include <malloc.h>
+#endif
+
 #include <openssl/err.h>
 #include <openssl/ssl.h>
 
@@ -1692,6 +1696,28 @@ make_event(ErlNifEnv *env,
                           prop);      // 4th element, event props :: any()) //
 }
 
+#if defined(__linux__)
+ERL_NIF_TERM
+do_malloc_trim(__unused_parm__ ErlNifEnv *env,
+               __unused_parm__ int argc,
+               __unused_parm__ const ERL_NIF_TERM argv[])
+{
+  CXPLAT_FRE_ASSERT(argc == 0);
+  malloc_trim(0);
+  return ATOM_OK;
+}
+
+ERL_NIF_TERM
+do_malloc_stats(__unused_parm__ ErlNifEnv *env,
+                __unused_parm__ int argc,
+                __unused_parm__ const ERL_NIF_TERM argv[])
+{
+  CXPLAT_FRE_ASSERT(argc == 0);
+  malloc_stats();
+  return ATOM_OK;
+}
+#endif
+
 static ErlNifFunc nif_funcs[] = {
   /* |  name  | arity| funptr | flags|
    *
@@ -1741,8 +1767,13 @@ static ErlNifFunc nif_funcs[] = {
   { "get_conn_owner", 1, get_conn_owner1, 0},
   { "get_stream_owner", 1, get_stream_owner1, 0},
   { "get_listener_owner", 1, get_listener_owner1, 0},
+  { "copy_stream_handle", 1, copy_stream_handle, 0},
   /* for testing */
   { "mock_buffer_sig", 3, mock_buffer_sig, 0},
+#if defined(__linux__)
+  { "malloc_trim", 0, do_malloc_trim, 0},
+  { "malloc_stats", 0, do_malloc_stats, 0},
+#endif
   #ifdef QUICER_USE_SNK
   { "set_snab_kc_pid", 1, set_snab_kc_pid, 0},
   { "get_snab_kc_pid", 0, get_snab_kc_pid, 0},
diff --git a/src/quicer_nif.erl b/src/quicer_nif.erl
index 16fa7934..3d260a0a 100644
--- a/src/quicer_nif.erl
+++ b/src/quicer_nif.erl
@@ -54,6 +54,12 @@
     get_stream_rid/1
 ]).
 
+%% tools
+-export([
+    malloc_trim/0,
+    malloc_stats/0
+]).
+
 %% For tests only
 -export([
     open_connection/0,
@@ -65,6 +71,7 @@
     get_conn_owner/1,
     get_stream_owner/1,
     get_listener_owner/1,
+    copy_stream_handle/1,
     mock_buffer_sig/3,
     set_snab_kc_pid/1,
     get_snab_kc_pid/0
@@ -346,6 +353,14 @@ get_conn_rid(_Handle) ->
 get_stream_rid(_Handle) ->
     erlang:nif_error(nif_library_not_loaded).
 
+-spec malloc_trim() -> ok.
+malloc_trim() ->
+    erlang:nif_error(nif_library_not_loaded).
+
+-spec malloc_stats() -> ok.
+malloc_stats() ->
+    erlang:nif_error(nif_library_not_loaded).
+
 -spec controlling_process(connection_handle() | stream_handle(), pid()) ->
     ok
     | {error, closed | badarg | owner_dead | not_owner}.
@@ -385,6 +400,10 @@ get_connections() ->
 get_connections(_RegHandle) ->
     erlang:nif_error(nif_library_not_loaded).
 
+-spec copy_stream_handle(stream_handle()) -> {ok, stream_handle()} | {error, badarg}.
+copy_stream_handle(_H) ->
+    erlang:nif_error(nif_library_not_loaded).
+
 %% @doc enable signal buffering, used in stream handoff.
 %% * not exposed API.
 -spec enable_sig_buffer(stream_handle()) -> ok.
diff --git a/test/quicer_SUITE.erl b/test/quicer_SUITE.erl
index 14c65954..0c6a4928 100644
--- a/test/quicer_SUITE.erl
+++ b/test/quicer_SUITE.erl
@@ -155,6 +155,10 @@
     tc_peercert_server/1,
     tc_peercert_server_nocert/1,
 
+    %% Toolings
+    tc_malloc_trim/1,
+    tc_malloc_stats/1,
+
     %% Versions test
     tc_abi_version/1
     %% testcase to verify env works
@@ -226,6 +230,14 @@ end_per_group(_Groupname, _Config) ->
 %%%===================================================================
 %%% Testcase specific setup/teardown
 %%%===================================================================
+init_per_testcase(TC, Config) when
+    TC =:= tc_malloc_trim orelse
+        TC =:= tc_malloc_stats
+->
+    case os:type() of
+        {unix, darwin} -> {skip, "Not runnable on MacOS"};
+        _ -> Config
+    end;
 init_per_testcase(_TestCase, Config) ->
     quicer_test_lib:cleanup_msquic(),
     [{timetrap, 5000} | Config].
@@ -838,10 +850,10 @@ tc_stream_controlling_process_demon(Config) ->
                 end
             ),
             receive
-                {'DOWN', MonRef, process, NewOwner, {Res, Stm}} ->
+                {'DOWN', MonRef, process, OldOwner, {Res, Stm}} ->
                     ct:pal("Set controlling_process res: ~p", [Res])
             end,
-            ?assertEqual({error, owner_dead}, quicer:controlling_process(Stm, NewOwner)),
+            ?assertEqual({error, owner_dead}, quicer:controlling_process(Stm, OldOwner)),
             ok = quicer:setopt(Stm, active, true),
             {ok, _Len} = quicer:send(Stm, <<"owner_changed">>),
             receive
@@ -3193,6 +3205,12 @@ tc_setopt_congestion_control_algorithm(Config) ->
     SPid ! done,
     ok.
 
+tc_malloc_trim(_) ->
+    quicer_nif:malloc_trim().
+
+tc_malloc_stats(_) ->
+    quicer_nif:malloc_stats().
+
 %%% ====================
 %%% Internal helpers
 %%% ====================