Remove the ability to allow multiple gc prologue and gc epilogue callbacks

runtime/vm/dart_api_impl_test.cc

 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 #include "bin/builtin.h"
 #include "include/dart_api.h"
 #include "include/dart_debugger_api.h"
 #include "include/dart_mirrors_api.h"
 #include "include/dart_native_api.h"
 #include "platform/assert.h"
@@ skipping 2863 matching lines @@
   global_epilogue_callback_status *= 4;
 }
 
 
 static void EpilogueCallbackTimes5() {
   global_epilogue_callback_status *= 5;
 }
 
 
 TEST_CASE(AddGarbageCollectionCallbacks) {
+  // Prologue callback addition testing.
+
   // Add a prologue callback.
   EXPECT_VALID(Dart_AddGcPrologueCallback(&PrologueCallbackTimes2));
 
   // Add the same prologue callback again.  This is an error.
   EXPECT(Dart_IsError(Dart_AddGcPrologueCallback(&PrologueCallbackTimes2)));
 
-  // Add another prologue callback.
-  EXPECT_VALID(Dart_AddGcPrologueCallback(&PrologueCallbackTimes3));
+  // Add another prologue callback. This is an error.
+  EXPECT(Dart_IsError(Dart_AddGcPrologueCallback(&PrologueCallbackTimes3)));
 
-  // Add the same prologue callback again.  This is an error.
-  EXPECT(Dart_IsError(Dart_AddGcPrologueCallback(&PrologueCallbackTimes3)));
+  // Epilogue callback addition testing.
 
   // Add an epilogue callback.
   EXPECT_VALID(Dart_AddGcEpilogueCallback(&EpilogueCallbackTimes4));
 
   // Add the same epilogue callback again.  This is an error.
   EXPECT(Dart_IsError(Dart_AddGcEpilogueCallback(&EpilogueCallbackTimes4)));
 
-  // Add annother epilogue callback.
-  EXPECT_VALID(Dart_AddGcEpilogueCallback(&EpilogueCallbackTimes5));
-
-  // Add the same epilogue callback again.  This is an error.
+  // Add annother epilogue callback. This is an error.
   EXPECT(Dart_IsError(Dart_AddGcEpilogueCallback(&EpilogueCallbackTimes5)));
 }
 
 
 TEST_CASE(RemoveGarbageCollectionCallbacks) {
+  // Prologue callback removal testing.
+
   // Remove a prologue callback that has not been added.  This is an error.
   EXPECT(Dart_IsError(Dart_RemoveGcPrologueCallback(&PrologueCallbackTimes2)));
 
   // Add a prologue callback.
   EXPECT_VALID(Dart_AddGcPrologueCallback(&PrologueCallbackTimes2));
 
   // Remove a prologue callback.
   EXPECT_VALID(Dart_RemoveGcPrologueCallback(&PrologueCallbackTimes2));
 
   // Remove a prologue callback again.  This is an error.
   EXPECT(Dart_IsError(Dart_RemoveGcPrologueCallback(&PrologueCallbackTimes2)));
 
-  // Add two prologue callbacks.
+  // Add a prologue callback.
   EXPECT_VALID(Dart_AddGcPrologueCallback(&PrologueCallbackTimes2));
-  EXPECT_VALID(Dart_AddGcPrologueCallback(&PrologueCallbackTimes3));
 
-  // Remove two prologue callbacks.
-  EXPECT_VALID(Dart_RemoveGcPrologueCallback(&PrologueCallbackTimes3));
-  EXPECT_VALID(Dart_RemoveGcPrologueCallback(&PrologueCallbackTimes2));
+  // Remove a prolog callback that was not added. This is an error.
+  EXPECT(Dart_IsError(Dart_RemoveGcPrologueCallback(&PrologueCallbackTimes3)));
 
-  // Remove epilogue callbacks again.  This is an error.
+  // Epilogue callback removal testing.
+
+  // Remove epilogue callback that was not added.  This is an error.
   EXPECT(Dart_IsError(Dart_RemoveGcEpilogueCallback(&EpilogueCallbackTimes4)));
-  EXPECT(Dart_IsError(Dart_RemoveGcEpilogueCallback(&EpilogueCallbackTimes5)));
 
-  // Remove a epilogue callback that has not been added.  This is an error.
-  EXPECT(Dart_IsError(Dart_RemoveGcEpilogueCallback(&EpilogueCallbackTimes5)));
-
-  // Add a epilogue callback.
+  // Add an epilogue callback.
   EXPECT_VALID(Dart_AddGcEpilogueCallback(&EpilogueCallbackTimes4));
 
-  // Remove a epilogue callback.
+  // Remove an epilogue callback.
   EXPECT_VALID(Dart_RemoveGcEpilogueCallback(&EpilogueCallbackTimes4));
 
-  // Remove a epilogue callback again.  This is an error.
+  // Remove an epilogue callback again.  This is an error.
   EXPECT(Dart_IsError(Dart_RemoveGcEpilogueCallback(&EpilogueCallbackTimes4)));
 
-  // Add two epilogue callbacks.
+  // Add an epilogue callbacks.
   EXPECT_VALID(Dart_AddGcEpilogueCallback(&EpilogueCallbackTimes4));
-  EXPECT_VALID(Dart_AddGcEpilogueCallback(&EpilogueCallbackTimes5));
 
-  // Remove two epilogue callbacks.
-  EXPECT_VALID(Dart_RemoveGcEpilogueCallback(&EpilogueCallbackTimes5));
-  EXPECT_VALID(Dart_RemoveGcEpilogueCallback(&EpilogueCallbackTimes4));
-
-  // Remove epilogue callbacks again.  This is an error.
-  EXPECT(Dart_IsError(Dart_RemoveGcEpilogueCallback(&EpilogueCallbackTimes4)));
+  // Remove an epilogue callback that was not added. This is an error.
   EXPECT(Dart_IsError(Dart_RemoveGcEpilogueCallback(&EpilogueCallbackTimes5)));
 }
 
 
 TEST_CASE(SingleGarbageCollectionCallback) {
   // Add a prologue callback.
   EXPECT_VALID(Dart_AddGcPrologueCallback(&PrologueCallbackTimes2));
 
   // Garbage collect new space ignoring callbacks.  This should not
   // invoke the prologue callback.  No status values should change.
@@ skipping 80 matching lines @@
 
   // Garbage collect old space.  No callbacks should be invoked.  No
   // status values should change.
   global_prologue_callback_status = 3;
   global_epilogue_callback_status = 7;
   Isolate::Current()->heap()->CollectGarbage(Heap::kOld);
   EXPECT_EQ(3, global_prologue_callback_status);
   EXPECT_EQ(7, global_epilogue_callback_status);
 }
 
-TEST_CASE(MultipleGarbageCollectionCallbacks) {
-  // Add prologue callbacks.
-  EXPECT_VALID(Dart_AddGcPrologueCallback(&PrologueCallbackTimes2));
-  EXPECT_VALID(Dart_AddGcPrologueCallback(&PrologueCallbackTimes3));
-
-  // Add an epilogue callback.
-  EXPECT_VALID(Dart_AddGcEpilogueCallback(&EpilogueCallbackTimes4));
-
-  // Garbage collect new space.  This should not invoke the prologue
-  // or epilogue callbacks.  No status values should change.
-  global_prologue_callback_status = 3;
-  global_epilogue_callback_status = 7;
-  GCTestHelper::CollectNewSpace(Heap::kIgnoreApiCallbacks);
-  EXPECT_EQ(3, global_prologue_callback_status);
-  EXPECT_EQ(7, global_epilogue_callback_status);
-
-  // Garbage collect old space.  This should invoke both prologue
-  // callbacks and the epilogue callback.  The prologue and epilogue
-  // status values should change.
-  global_prologue_callback_status = 3;
-  global_epilogue_callback_status = 7;
-  Isolate::Current()->heap()->CollectGarbage(Heap::kOld);
-  EXPECT_EQ(18, global_prologue_callback_status);
-  EXPECT_EQ(28, global_epilogue_callback_status);
-
-  // Add another GC epilogue callback.
-  EXPECT_VALID(Dart_AddGcEpilogueCallback(&EpilogueCallbackTimes5));
-
-  // Garbage collect old space.  This should invoke both prologue
-  // callbacks and both epilogue callbacks.  The prologue and epilogue
-  // status values should change.
-  global_prologue_callback_status = 3;
-  global_epilogue_callback_status = 7;
-  Isolate::Current()->heap()->CollectGarbage(Heap::kOld);
-  EXPECT_EQ(18, global_prologue_callback_status);
-  EXPECT_EQ(140, global_epilogue_callback_status);
-
-  // Remove an epilogue callback.
-  EXPECT_VALID(Dart_RemoveGcEpilogueCallback(&EpilogueCallbackTimes4));
-
-  // Garbage collect old space.  This should invoke both prologue
-  // callbacks and the remaining epilogue callback.  The prologue and
-  // epilogue status values should change.
-  global_prologue_callback_status = 3;
-  global_epilogue_callback_status = 7;
-  Isolate::Current()->heap()->CollectGarbage(Heap::kOld);
-  EXPECT_EQ(18, global_prologue_callback_status);
-  EXPECT_EQ(35, global_epilogue_callback_status);
-
-  // Remove the remaining epilogue callback.
-  EXPECT_VALID(Dart_RemoveGcEpilogueCallback(&EpilogueCallbackTimes5));
-
-  // Garbage collect old space.  This should invoke both prologue
-  // callbacks.  The prologue status value should change.
-  global_prologue_callback_status = 3;
-  global_epilogue_callback_status = 7;
-  Isolate::Current()->heap()->CollectGarbage(Heap::kOld);
-  EXPECT_EQ(18, global_prologue_callback_status);
-  EXPECT_EQ(7, global_epilogue_callback_status);
-
-  // Remove a prologue callback.
-  EXPECT_VALID(Dart_RemoveGcPrologueCallback(&PrologueCallbackTimes3));
-
-  // Garbage collect old space.  This should invoke the remaining
-  // prologue callback.  The prologue status value should change.
-  global_prologue_callback_status = 3;
-  global_epilogue_callback_status = 7;
-  Isolate::Current()->heap()->CollectGarbage(Heap::kOld);
-  EXPECT_EQ(6, global_prologue_callback_status);
-  EXPECT_EQ(7, global_epilogue_callback_status);
-
-  // Remove the remaining prologue callback.
-  EXPECT_VALID(Dart_RemoveGcPrologueCallback(&PrologueCallbackTimes2));
-
-  // Garbage collect old space.  No callbacks should be invoked.  No
-  // status values should change.
-  global_prologue_callback_status = 3;
-  global_epilogue_callback_status = 7;
-  Isolate::Current()->heap()->CollectGarbage(Heap::kOld);
-  EXPECT_EQ(3, global_prologue_callback_status);
-  EXPECT_EQ(7, global_epilogue_callback_status);
-}
-
 
 // Unit test for creating multiple scopes and local handles within them.
 // Ensure that the local handles get all cleaned out when exiting the
 // scope.
 UNIT_TEST_CASE(LocalHandles) {
   TestCase::CreateTestIsolate();
   Isolate* isolate = Isolate::Current();
   EXPECT(isolate != NULL);
   ApiState* state = isolate->api_state();
   EXPECT(state != NULL);
@@ skipping 4986 matching lines @@
                                    NewString("main"),
                                    1,
                                    dart_args);
   int64_t value = 0;
   result = Dart_IntegerToInt64(result, &value);
   EXPECT_VALID(result);
   EXPECT_EQ(6, value);
 }
 
 }  // namespace dart