Implement safepointing of threads

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));
+  TransitionNativeToVM transition(thread);
   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));
+  TransitionNativeToVM transition(thread);
   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);
 
   EXPECT_VALID(result);
   EXPECT(!Dart_IsNull(result));
   EXPECT(Dart_IsList(result));
+  TransitionNativeToVM transition(thread);
   Isolate* isolate = Isolate::Current();
   Heap* heap = isolate->heap();
   heap->CollectGarbage(Heap::kOld);
   Dart_ExitScope();
   heap->CollectGarbage(Heap::kOld);
 }
 
 
 class ClassHeapStatsTestHelper {
  public:
@@ skipping 31 matching lines @@
   "  return new A();\n"
   "}\n";
   Dart_Handle h_lib = TestCase::LoadTestScript(kScriptChars, NULL);
   Isolate* isolate = Isolate::Current();
   ClassTable* class_table = isolate->class_table();
   Heap* heap = isolate->heap();
   Dart_EnterScope();
   Dart_Handle result = Dart_Invoke(h_lib, NewString("main"), 0, NULL);
   EXPECT_VALID(result);
   EXPECT(!Dart_IsNull(result));
+  TransitionNativeToVM transition(thread);
   Library& lib = Library::Handle();
   lib ^= Api::UnwrapHandle(h_lib);
   EXPECT(!lib.IsNull());
   const Class& cls = Class::Handle(GetClass(lib, "A"));
   ASSERT(!cls.IsNull());
   intptr_t cid = cls.id();
   ClassHeapStats* class_stats =
       ClassHeapStatsTestHelper::GetHeapStatsForCid(class_table,
                                                    cid);
   // Verify preconditions:
@@ skipping 152 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, true /* include_code_pages */);
   EXPECT(heap->Contains(RawObject::ToAddr(obj.raw())));
   heap->WriteProtect(false, true /* include_code_pages */);
   EXPECT(heap->Contains(RawObject::ToAddr(obj.raw())));
 }
 
 }  // namespace dart.