refs test: reduce number of repeats under Wine

Under Wine, the API calls we use to do this are implemented via IPC
to wineserver, which makes it unreasonably slow to try to brute-force
bugs by having many threads stress-test refcounting. Do a few
repetitions just to verify that refcounting basically works, but
don't do the full stress-test.

Bug: https://bugs.freedesktop.org/show_bug.cgi?id=92538
Reviewed-by: Ralf Habacker <ralf.habacker@freenet.de>
[rh: add WINESERVERSOCKET related hint]

1 files changed, 68 insertions, 32 deletions

diff --git a/test/internals/refs.c b/test/internals/refs.c
index 7eae44e1..a4656622 100644
--- a/test/internals/refs.c
+++ b/test/internals/refs.c
@@ -62,12 +62,15 @@ typedef struct {
   DBusMessage *message;
   GThread *threads[N_THREADS];
   gboolean last_unref;
+  unsigned n_refs;
+  unsigned n_threads;
 } Fixture;
 
 typedef void *(*RefFunc) (void *);
 typedef void (*VoidFunc) (void *);
 
 typedef struct {
+  const Fixture *f;
   void *thing;
   RefFunc ref;
   VoidFunc ref_void;
@@ -86,9 +89,10 @@ static gpointer
 ref_thread (gpointer data)
 {
   Thread *thread = data;
-  int i;
+  const Fixture *f = thread->f;
+  unsigned i;
 
-  for (i = 0; i < N_REFS; i++)
+  for (i = 0; i < f->n_refs; i++)
     {
       if (thread->lock != NULL)
         (thread->lock) (thread->mutex);
@@ -115,9 +119,10 @@ static gpointer
 cycle_thread (gpointer data)
 {
   Thread *thread = data;
-  int i;
+  const Fixture *f = thread->f;
+  unsigned i;
 
-  for (i = 0; i < N_REFS; i++)
+  for (i = 0; i < f->n_refs; i++)
     {
       if (thread->lock != NULL)
         (thread->lock) (thread->mutex);
@@ -146,9 +151,10 @@ static gpointer
 unref_thread (gpointer data)
 {
   Thread *thread = data;
-  int i;
+  const Fixture *f = thread->f;
+  unsigned i;
 
-  for (i = 0; i < N_REFS; i++)
+  for (i = 0; i < f->n_refs; i++)
     {
       if (thread->lock != NULL)
         (thread->lock) (thread->mutex);
@@ -174,9 +180,9 @@ last_unref (void *data)
 static void
 wait_for_all_threads (Fixture *f)
 {
-  int i;
+  unsigned i;
 
-  for (i = 0; i < N_THREADS; i++)
+  for (i = 0; i < f->n_threads; i++)
     g_thread_join (f->threads[i]);
 }
 
@@ -200,6 +206,20 @@ setup (Fixture *f,
   if (!dbus_threads_init_default ())
     g_error ("OOM");
 
+  f->n_threads = N_THREADS;
+  f->n_refs = N_REFS;
+
+  // wine sets WINESERVERSOCKET for its child processes automatically
+  if (g_getenv ("WINESERVERSOCKET") != NULL)
+    {
+      /* Our reference-counting is really slow under Wine (it involves
+       * IPC to wineserver). Do fewer iterations: enough to demonstrate
+       * that it works, rather than a performance test.
+       */
+      f->n_threads = 10;
+      f->n_refs = 10;
+    }
+
   f->loop = _dbus_loop_new ();
   g_assert (f->loop != NULL);
 
@@ -257,28 +277,32 @@ static void
 test_connection (Fixture *f,
     gconstpointer data)
 {
-  Thread public_api = { f->connection,
+  Thread public_api = {
+    f,
+    f->connection,
     (RefFunc) dbus_connection_ref,
     NULL,
     (VoidFunc) dbus_connection_unref,
     NULL,
     NULL,
     NULL };
-  Thread internal_api = { f->connection,
+  Thread internal_api = {
+    f,
+    f->connection,
     (RefFunc) _dbus_connection_ref_unlocked,
     NULL,
     (VoidFunc) _dbus_connection_unref_unlocked,
     f->connection,
     (VoidFunc) _dbus_connection_lock,
     (VoidFunc) _dbus_connection_unlock };
-  int i;
+  unsigned i;
 
   /* Use a slot as a pseudo-weakref */
   if (!dbus_connection_set_data (f->connection, connection_slot, f,
         last_unref))
     g_error ("OOM");
 
-  for (i = 0; i < N_THREADS; i++)
+  for (i = 0; i < f->n_threads; i++)
     {
       if ((i % 2) == 0)
         f->threads[i] = g_thread_new (NULL, ref_thread, &public_api);
@@ -290,7 +314,7 @@ test_connection (Fixture *f,
 
   wait_for_all_threads (f);
 
-  for (i = 0; i < N_THREADS; i++)
+  for (i = 0; i < f->n_threads; i++)
     {
       if ((i % 2) == 0)
         f->threads[i] = g_thread_new (NULL, cycle_thread, &public_api);
@@ -302,7 +326,7 @@ test_connection (Fixture *f,
 
   wait_for_all_threads (f);
 
-  for (i = 0; i < N_THREADS; i++)
+  for (i = 0; i < f->n_threads; i++)
     {
       if ((i % 2) == 0)
         f->threads[i] = g_thread_new (NULL, unref_thread, &public_api);
@@ -338,26 +362,30 @@ static void
 test_server (Fixture *f,
     gconstpointer data)
 {
-  Thread public_api = { f->server,
+  Thread public_api = {
+    f,
+    f->server,
     (RefFunc) dbus_server_ref,
     NULL,
     (VoidFunc) dbus_server_unref,
     NULL,
     NULL,
     NULL };
-  Thread internal_api = { f->server,
+  Thread internal_api = {
+    f,
+    f->server,
     NULL,
     (VoidFunc) _dbus_server_ref_unlocked,
     (VoidFunc) _dbus_server_unref_unlocked,
     f->server,
     server_lock,
     server_unlock };
-  int i;
+  unsigned i;
 
   if (!dbus_server_set_data (f->server, server_slot, f, last_unref))
     g_error ("OOM");
 
-  for (i = 0; i < N_THREADS; i++)
+  for (i = 0; i < f->n_threads; i++)
     {
       if ((i % 2) == 0)
         f->threads[i] = g_thread_new (NULL, ref_thread, &public_api);
@@ -369,7 +397,7 @@ test_server (Fixture *f,
 
   wait_for_all_threads (f);
 
-  for (i = 0; i < N_THREADS; i++)
+  for (i = 0; i < f->n_threads; i++)
     {
       if ((i % 2) == 0)
         f->threads[i] = g_thread_new (NULL, cycle_thread, &public_api);
@@ -381,7 +409,7 @@ test_server (Fixture *f,
 
   wait_for_all_threads (f);
 
-  for (i = 0; i < N_THREADS; i++)
+  for (i = 0; i < f->n_threads; i++)
     {
       if ((i % 2) == 0)
         f->threads[i] = g_thread_new (NULL, unref_thread, &public_api);
@@ -407,19 +435,21 @@ test_message (Fixture *f,
 {
   DBusMessage *message = dbus_message_new_signal ("/foo", "foo.bar.baz",
       "Foo");
-  Thread public_api = { message,
+  Thread public_api = {
+    f,
+    message,
     (RefFunc) dbus_message_ref,
     NULL,
     (VoidFunc) dbus_message_unref,
     NULL,
     NULL,
     NULL };
-  int i;
+  unsigned i;
 
   if (!dbus_message_set_data (message, message_slot, f, last_unref))
     g_error ("OOM");
 
-  for (i = 0; i < N_THREADS; i++)
+  for (i = 0; i < f->n_threads; i++)
     {
       f->threads[i] = g_thread_new (NULL, ref_thread, &public_api);
       g_assert (f->threads[i] != NULL);
@@ -427,7 +457,7 @@ test_message (Fixture *f,
 
   wait_for_all_threads (f);
 
-  for (i = 0; i < N_THREADS; i++)
+  for (i = 0; i < f->n_threads; i++)
     {
       f->threads[i] = g_thread_new (NULL, cycle_thread, &public_api);
       g_assert (f->threads[i] != NULL);
@@ -435,7 +465,7 @@ test_message (Fixture *f,
 
   wait_for_all_threads (f);
 
-  for (i = 0; i < N_THREADS; i++)
+  for (i = 0; i < f->n_threads; i++)
     {
       f->threads[i] = g_thread_new (NULL, unref_thread, &public_api);
       g_assert (f->threads[i] != NULL);
@@ -453,14 +483,18 @@ static void
 test_pending_call (Fixture *f,
     gconstpointer data)
 {
-  Thread public_api = { NULL,
+  Thread public_api = {
+    f,
+    NULL,
     (RefFunc) dbus_pending_call_ref,
     NULL,
     (VoidFunc) dbus_pending_call_unref,
     NULL,
     NULL,
     NULL };
-  Thread internal_api = { NULL,
+  Thread internal_api = {
+    f,
+    NULL,
     (RefFunc) _dbus_pending_call_ref_unlocked,
     NULL,
     (VoidFunc) dbus_pending_call_unref,
@@ -468,14 +502,16 @@ test_pending_call (Fixture *f,
     (VoidFunc) _dbus_connection_lock,
     (VoidFunc) _dbus_connection_unlock };
   /* This one can't be used to ref, only to cycle or unref. */
-  Thread unref_and_unlock_api = { NULL,
+  Thread unref_and_unlock_api = {
+    f,
+    NULL,
     (RefFunc) _dbus_pending_call_ref_unlocked,
     NULL,
     (VoidFunc) _dbus_pending_call_unref_and_unlock,
     f->connection,
     (VoidFunc) _dbus_connection_lock,
     NULL };
-  int i;
+  unsigned i;
   DBusPendingCall *pending_call;
 
   _dbus_connection_lock (f->connection);
@@ -492,7 +528,7 @@ test_pending_call (Fixture *f,
         last_unref))
     g_error ("OOM");
 
-  for (i = 0; i < N_THREADS; i++)
+  for (i = 0; i < f->n_threads; i++)
     {
       if ((i % 2) == 0)
         f->threads[i] = g_thread_new (NULL, ref_thread, &public_api);
@@ -504,7 +540,7 @@ test_pending_call (Fixture *f,
 
   wait_for_all_threads (f);
 
-  for (i = 0; i < N_THREADS; i++)
+  for (i = 0; i < f->n_threads; i++)
     {
       switch (i % 3)
         {
@@ -524,7 +560,7 @@ test_pending_call (Fixture *f,
 
   wait_for_all_threads (f);
 
-  for (i = 0; i < N_THREADS; i++)
+  for (i = 0; i < f->n_threads; i++)
     {
       switch (i % 3)
         {