Parallel marking.

runtime/vm/heap_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 "platform/globals.h"
 
 #include "platform/assert.h"
 #include "vm/dart_api_impl.h"
 #include "vm/globals.h"
 #include "vm/heap.h"
 #include "vm/unit_test.h"
 
 namespace dart {
 
+DECLARE_FLAG(int, marker_tasks);
+
 TEST_CASE(OldGC) {
   const char* kScriptChars =
   "main() {\n"
   "  return [1, 2, 3];\n"
   "}\n";
   FLAG_verbose_gc = true;
   Dart_Handle lib = TestCase::LoadTestScript(kScriptChars, NULL);
   Dart_Handle result = Dart_Invoke(lib, NewString("main"), 0, NULL);
 
   EXPECT_VALID(result);
   EXPECT(!Dart_IsNull(result));
   EXPECT(Dart_IsList(result));
   Isolate* isolate = Isolate::Current();
   Heap* heap = isolate->heap();
   heap->CollectGarbage(Heap::kOld);
 }
 
 
+TEST_CASE(OldGC_Unsync) {
+  FLAG_marker_tasks = 0;
+  const char* kScriptChars =
+  "main() {\n"
+  "  return [1, 2, 3];\n"
+  "}\n";
+  FLAG_verbose_gc = true;
+  Dart_Handle lib = TestCase::LoadTestScript(kScriptChars, NULL);
+  Dart_Handle result = Dart_Invoke(lib, NewString("main"), 0, NULL);
+
+  EXPECT_VALID(result);
+  EXPECT(!Dart_IsNull(result));
+  EXPECT(Dart_IsList(result));
+  Isolate* isolate = Isolate::Current();
+  Heap* heap = isolate->heap();
+  heap->CollectGarbage(Heap::kOld);
+}
+
+
 TEST_CASE(LargeSweep) {
   const char* kScriptChars =
   "main() {\n"
   "  return new List(8 * 1024 * 1024);\n"
   "}\n";
   FLAG_verbose_gc = true;
   Dart_Handle lib = TestCase::LoadTestScript(kScriptChars, NULL);
   Dart_EnterScope();
   Dart_Handle result = Dart_Invoke(lib, NewString("main"), 0, NULL);
 
@@ skipping 216 matching lines @@
   const String& obj = String::Handle(String::New("x", Heap::kOld));
   Heap* heap = Thread::Current()->isolate()->heap();
   EXPECT(heap->Contains(RawObject::ToAddr(obj.raw())));
   heap->WriteProtect(true);
   EXPECT(heap->Contains(RawObject::ToAddr(obj.raw())));
   heap->WriteProtect(false);
   EXPECT(heap->Contains(RawObject::ToAddr(obj.raw())));
 }
 
 }  // namespace dart.