Add filler at the new space top when forcing scavenge.

test/cctest/test-api.cc

 // Copyright 2012 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 7081 matching lines @@
   }
 
   object_a.flag = false;
   object_b.flag = false;
   object_a.handle.SetWeak(&object_a, &DisposeAndSetFlag);
   object_b.handle.SetWeak(&object_b, &DisposeAndSetFlag);
   CHECK(!object_b.handle.IsIndependent());
   object_a.handle.MarkIndependent();
   object_b.handle.MarkIndependent();
   CHECK(object_b.handle.IsIndependent());
-  CcTest::heap()->PerformScavenge();
+  CcTest::heap()->CollectGarbage(i::NEW_SPACE);
   CHECK(object_a.flag);
   CHECK(object_b.flag);
 }
 
 
 static void InvokeScavenge() {
-  CcTest::heap()->PerformScavenge();
+  CcTest::heap()->CollectGarbage(i::NEW_SPACE);
 }
 
 
 static void InvokeMarkSweep() {
   CcTest::heap()->CollectAllGarbage(i::Heap::kNoGCFlags);
 }
 
 
 static void ForceScavenge(
     const v8::WeakCallbackData<v8::Object, FlagAndPersistent>& data) {
@@ skipping 61 matching lines @@
     v8::HandleScope handle_scope(isolate);
     v8::Local<v8::Object> o = v8::Object::New(isolate);
     object.handle.Reset(isolate, o);
     o->Set(v8_str("x"), v8::Integer::New(isolate, 1));
     v8::Local<String> y_str = v8_str("y");
     o->Set(y_str, y_str);
   }
   object.flag = false;
   object.handle.SetWeak(&object, &RevivingCallback);
   object.handle.MarkIndependent();
-  CcTest::heap()->PerformScavenge();
+  CcTest::heap()->CollectGarbage(i::NEW_SPACE);
   CHECK(object.flag);
   CcTest::heap()->CollectAllGarbage(i::Heap::kAbortIncrementalMarkingMask);
   {
     v8::HandleScope handle_scope(isolate);
     v8::Local<v8::Object> o =
         v8::Local<v8::Object>::New(isolate, object.handle);
     v8::Local<String> y_str = v8_str("y");
     CHECK_EQ(v8::Integer::New(isolate, 1), o->Get(v8_str("x")));
     CHECK(o->Get(y_str)->Equals(y_str));
   }
@@ skipping 10441 matching lines @@
     finished = v8::V8::IdleNotification(kShortIdlePauseInMs);
   }
   intptr_t final_size = CcTest::heap()->SizeOfObjects();
   CHECK_LT(final_size, initial_size + 1);
 }
 
 
 TEST(Regress2333) {
   LocalContext env;
   for (int i = 0; i < 3; i++) {
-    CcTest::heap()->PerformScavenge();
+    CcTest::heap()->CollectGarbage(i::NEW_SPACE);
   }
 }
 
 static uint32_t* stack_limit;
 
 static void GetStackLimitCallback(
     const v8::FunctionCallbackInfo<v8::Value>& args) {
   stack_limit = reinterpret_cast<uint32_t*>(
       CcTest::i_isolate()->stack_guard()->real_climit());
 }
@@ skipping 4445 matching lines @@
 Local<Object> ApiCallOptimizationChecker::holder;
 Local<Object> ApiCallOptimizationChecker::callee;
 int ApiCallOptimizationChecker::count = 0;
 
 
 TEST(TestFunctionCallOptimization) {
   i::FLAG_allow_natives_syntax = true;
   ApiCallOptimizationChecker checker;
   checker.RunAll();
 }