Revert of Type Feedback Vector lives in the closure

test/cctest/heap/test-heap.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 3609 matching lines @@
 
   // Prepare function f that contains type feedback for the two closures.
   CHECK(CcTest::global()->Set(ctx, v8_str("fun1"), fun1).FromJust());
   CHECK(CcTest::global()->Set(ctx, v8_str("fun2"), fun2).FromJust());
   CompileRun("function f(a, b) { a(); b(); } f(fun1, fun2);");
 
   Handle<JSFunction> f = Handle<JSFunction>::cast(
       v8::Utils::OpenHandle(*v8::Local<v8::Function>::Cast(
           CcTest::global()->Get(ctx, v8_str("f")).ToLocalChecked())));
 
-  Handle<TypeFeedbackVector> feedback_vector(f->feedback_vector());
+  Handle<TypeFeedbackVector> feedback_vector(f->shared()->feedback_vector());
   FeedbackVectorHelper feedback_helper(feedback_vector);
 
   int expected_slots = 2;
   CHECK_EQ(expected_slots, feedback_helper.slot_count());
   int slot1 = 0;
   int slot2 = 1;
   CHECK(feedback_vector->Get(feedback_helper.slot(slot1))->IsWeakCell());
   CHECK(feedback_vector->Get(feedback_helper.slot(slot2))->IsWeakCell());
 
   SimulateIncrementalMarking(CcTest::heap());
@@ skipping 16 matching lines @@
       return target;
     }
   }
   return NULL;
 }
 
 
 static void CheckVectorIC(Handle<JSFunction> f, int slot_index,
                           InlineCacheState desired_state) {
   Handle<TypeFeedbackVector> vector =
-      Handle<TypeFeedbackVector>(f->feedback_vector());
+      Handle<TypeFeedbackVector>(f->shared()->feedback_vector());
   FeedbackVectorHelper helper(vector);
   FeedbackVectorSlot slot = helper.slot(slot_index);
   if (vector->GetKind(slot) == FeedbackVectorSlotKind::LOAD_IC) {
     LoadICNexus nexus(vector, slot);
     CHECK(nexus.StateFromFeedback() == desired_state);
   } else {
     CHECK_EQ(FeedbackVectorSlotKind::KEYED_LOAD_IC, vector->GetKind(slot));
     KeyedLoadICNexus nexus(vector, slot);
     CHECK(nexus.StateFromFeedback() == desired_state);
   }
 }
 
 
+static void CheckVectorICCleared(Handle<JSFunction> f, int slot_index) {
+  Handle<TypeFeedbackVector> vector =
+      Handle<TypeFeedbackVector>(f->shared()->feedback_vector());
+  FeedbackVectorSlot slot(slot_index);
+  LoadICNexus nexus(vector, slot);
+  CHECK(IC::IsCleared(&nexus));
+}
+
+
 TEST(IncrementalMarkingPreservesMonomorphicConstructor) {
   if (i::FLAG_always_opt) return;
   CcTest::InitializeVM();
   v8::HandleScope scope(CcTest::isolate());
   v8::Local<v8::Context> ctx = CcTest::isolate()->GetCurrentContext();
   // Prepare function f that contains a monomorphic IC for object
   // originating from the same native context.
   CompileRun(
       "function fun() { this.x = 1; };"
       "function f(o) { return new o(); } f(fun); f(fun);");
   Handle<JSFunction> f = Handle<JSFunction>::cast(
       v8::Utils::OpenHandle(*v8::Local<v8::Function>::Cast(
           CcTest::global()->Get(ctx, v8_str("f")).ToLocalChecked())));
 
-  Handle<TypeFeedbackVector> vector(f->feedback_vector());
+  Handle<TypeFeedbackVector> vector(f->shared()->feedback_vector());
   CHECK(vector->Get(FeedbackVectorSlot(0))->IsWeakCell());
 
   SimulateIncrementalMarking(CcTest::heap());
   CcTest::heap()->CollectAllGarbage();
 
   CHECK(vector->Get(FeedbackVectorSlot(0))->IsWeakCell());
 }
 
 
+TEST(IncrementalMarkingClearsMonomorphicConstructor) {
+  if (i::FLAG_always_opt) return;
+  CcTest::InitializeVM();
+  Isolate* isolate = CcTest::i_isolate();
+  v8::HandleScope scope(CcTest::isolate());
+  v8::Local<v8::Value> fun1;
+  v8::Local<v8::Context> ctx = CcTest::isolate()->GetCurrentContext();
+
+  {
+    LocalContext env;
+    CompileRun("function fun() { this.x = 1; };");
+    fun1 = env->Global()->Get(env.local(), v8_str("fun")).ToLocalChecked();
+  }
+
+  // Prepare function f that contains a monomorphic constructor for object
+  // originating from a different native context.
+  CHECK(CcTest::global()->Set(ctx, v8_str("fun1"), fun1).FromJust());
+  CompileRun(
+      "function fun() { this.x = 1; };"
+      "function f(o) { return new o(); } f(fun1); f(fun1);");
+  Handle<JSFunction> f = Handle<JSFunction>::cast(
+      v8::Utils::OpenHandle(*v8::Local<v8::Function>::Cast(
+          CcTest::global()->Get(ctx, v8_str("f")).ToLocalChecked())));
+
+
+  Handle<TypeFeedbackVector> vector(f->shared()->feedback_vector());
+  CHECK(vector->Get(FeedbackVectorSlot(0))->IsWeakCell());
+
+  // Fire context dispose notification.
+  CcTest::isolate()->ContextDisposedNotification();
+  SimulateIncrementalMarking(CcTest::heap());
+  CcTest::heap()->CollectAllGarbage();
+
+  CHECK_EQ(*TypeFeedbackVector::UninitializedSentinel(isolate),
+           vector->Get(FeedbackVectorSlot(0)));
+}
+
+
 TEST(IncrementalMarkingPreservesMonomorphicIC) {
   if (i::FLAG_always_opt) return;
   CcTest::InitializeVM();
   v8::HandleScope scope(CcTest::isolate());
   v8::Local<v8::Context> ctx = CcTest::isolate()->GetCurrentContext();
   // Prepare function f that contains a monomorphic IC for object
   // originating from the same native context.
   CompileRun("function fun() { this.x = 1; }; var obj = new fun();"
              "function f(o) { return o.x; } f(obj); f(obj);");
   Handle<JSFunction> f = Handle<JSFunction>::cast(
       v8::Utils::OpenHandle(*v8::Local<v8::Function>::Cast(
           CcTest::global()->Get(ctx, v8_str("f")).ToLocalChecked())));
 
   CheckVectorIC(f, 0, MONOMORPHIC);
 
   SimulateIncrementalMarking(CcTest::heap());
   CcTest::heap()->CollectAllGarbage();
 
   CheckVectorIC(f, 0, MONOMORPHIC);
 }
 
 
+TEST(IncrementalMarkingClearsMonomorphicIC) {
+  if (i::FLAG_always_opt) return;
+  CcTest::InitializeVM();
+  v8::HandleScope scope(CcTest::isolate());
+  v8::Local<v8::Value> obj1;
+  v8::Local<v8::Context> ctx = CcTest::isolate()->GetCurrentContext();
+
+  {
+    LocalContext env;
+    CompileRun("function fun() { this.x = 1; }; var obj = new fun();");
+    obj1 = env->Global()->Get(env.local(), v8_str("obj")).ToLocalChecked();
+  }
+
+  // Prepare function f that contains a monomorphic IC for object
+  // originating from a different native context.
+  CHECK(CcTest::global()->Set(ctx, v8_str("obj1"), obj1).FromJust());
+  CompileRun("function f(o) { return o.x; } f(obj1); f(obj1);");
+  Handle<JSFunction> f = Handle<JSFunction>::cast(
+      v8::Utils::OpenHandle(*v8::Local<v8::Function>::Cast(
+          CcTest::global()->Get(ctx, v8_str("f")).ToLocalChecked())));
+
+  CheckVectorIC(f, 0, MONOMORPHIC);
+
+  // Fire context dispose notification.
+  CcTest::isolate()->ContextDisposedNotification();
+  SimulateIncrementalMarking(CcTest::heap());
+  CcTest::heap()->CollectAllGarbage();
+
+  CheckVectorICCleared(f, 0);
+}
+
+
 TEST(IncrementalMarkingPreservesPolymorphicIC) {
   if (i::FLAG_always_opt) return;
   CcTest::InitializeVM();
   v8::HandleScope scope(CcTest::isolate());
   v8::Local<v8::Value> obj1, obj2;
   v8::Local<v8::Context> ctx = CcTest::isolate()->GetCurrentContext();
 
   {
     LocalContext env;
     CompileRun("function fun() { this.x = 1; }; var obj = new fun();");
@@ skipping 17 matching lines @@
 
   CheckVectorIC(f, 0, POLYMORPHIC);
 
   // Fire context dispose notification.
   SimulateIncrementalMarking(CcTest::heap());
   CcTest::heap()->CollectAllGarbage();
 
   CheckVectorIC(f, 0, POLYMORPHIC);
 }
 
-TEST(ContextDisposeDoesntClearPolymorphicIC) {
+
+TEST(IncrementalMarkingClearsPolymorphicIC) {
   if (i::FLAG_always_opt) return;
   CcTest::InitializeVM();
   v8::HandleScope scope(CcTest::isolate());
   v8::Local<v8::Value> obj1, obj2;
   v8::Local<v8::Context> ctx = CcTest::isolate()->GetCurrentContext();
 
   {
     LocalContext env;
     CompileRun("function fun() { this.x = 1; }; var obj = new fun();");
     obj1 = env->Global()->Get(env.local(), v8_str("obj")).ToLocalChecked();
@@ skipping 14 matching lines @@
       v8::Utils::OpenHandle(*v8::Local<v8::Function>::Cast(
           CcTest::global()->Get(ctx, v8_str("f")).ToLocalChecked())));
 
   CheckVectorIC(f, 0, POLYMORPHIC);
 
   // Fire context dispose notification.
   CcTest::isolate()->ContextDisposedNotification();
   SimulateIncrementalMarking(CcTest::heap());
   CcTest::heap()->CollectAllGarbage();
 
-  CheckVectorIC(f, 0, POLYMORPHIC);
+  CheckVectorICCleared(f, 0);
 }
 
 
 class SourceResource : public v8::String::ExternalOneByteStringResource {
  public:
   explicit SourceResource(const char* data)
     : data_(data), length_(strlen(data)) { }
 
   virtual void Dispose() {
     i::DeleteArray(data_);
@@ skipping 395 matching lines @@
     CompileRun("function g() { return 2 }"
                "g(); %OptimizeFunctionOnNextCall(g); g();");
 
     Handle<JSFunction> g = Handle<JSFunction>::cast(
         v8::Utils::OpenHandle(*v8::Local<v8::Function>::Cast(
             CcTest::global()->Get(env.local(), v8_str("g")).ToLocalChecked())));
     code = inner_scope.CloseAndEscape(handle(g->code(), isolate));
     if (!code->is_optimized_code()) return;
   }
 
-  Handle<TypeFeedbackVector> vector =
-      TypeFeedbackVector::New(isolate, handle(shared->feedback_metadata()));
+  Handle<TypeFeedbackVector> vector = handle(shared->feedback_vector());
   Handle<LiteralsArray> lit =
       LiteralsArray::New(isolate, vector, shared->num_literals(), TENURED);
   Handle<Context> context(isolate->context());
 
   // Add the new code several times to the optimized code map and also set an
   // allocation timeout so that expanding the code map will trigger a GC.
   heap->set_allocation_timeout(5);
   FLAG_gc_interval = 1000;
   for (int i = 0; i < 10; ++i) {
     BailoutId id = BailoutId(i);
@@ skipping 36 matching lines @@
     CompileRun("function g() { return 2 }"
                "g(); %OptimizeFunctionOnNextCall(g); g();");
 
     Handle<JSFunction> g = Handle<JSFunction>::cast(
         v8::Utils::OpenHandle(*v8::Local<v8::Function>::Cast(
             CcTest::global()->Get(env.local(), v8_str("g")).ToLocalChecked())));
     code = inner_scope.CloseAndEscape(handle(g->code(), isolate));
     if (!code->is_optimized_code()) return;
   }
 
-  Handle<TypeFeedbackVector> vector =
-      TypeFeedbackVector::New(isolate, handle(shared->feedback_metadata()));
+  Handle<TypeFeedbackVector> vector = handle(shared->feedback_vector());
   Handle<LiteralsArray> lit =
       LiteralsArray::New(isolate, vector, shared->num_literals(), TENURED);
   Handle<Context> context(isolate->context());
 
   // Add the code several times to the optimized code map.
   for (int i = 0; i < 3; ++i) {
     HandleScope inner_scope(isolate);
     BailoutId id = BailoutId(i);
     SharedFunctionInfo::AddToOptimizedCodeMap(shared, context, code, lit, id);
   }
@@ skipping 683 matching lines @@
   weak_ic_cleared = false;
   garbage.SetWeak(&garbage, &ClearWeakIC, v8::WeakCallbackType::kParameter);
   Heap* heap = CcTest::i_isolate()->heap();
   heap->CollectAllGarbage();
   CHECK(weak_ic_cleared);
 
   // We've determined the constructor in createObj has had it's weak cell
   // cleared. Now, verify that one additional call with a new function
   // allows monomorphicity.
   Handle<TypeFeedbackVector> feedback_vector = Handle<TypeFeedbackVector>(
-      createObj->feedback_vector(), CcTest::i_isolate());
+      createObj->shared()->feedback_vector(), CcTest::i_isolate());
   for (int i = 0; i < 20; i++) {
     Object* slot_value = feedback_vector->Get(FeedbackVectorSlot(0));
     CHECK(slot_value->IsWeakCell());
     if (WeakCell::cast(slot_value)->cleared()) break;
     heap->CollectAllGarbage();
   }
 
   Object* slot_value = feedback_vector->Get(FeedbackVectorSlot(0));
   CHECK(slot_value->IsWeakCell() && WeakCell::cast(slot_value)->cleared());
   CompileRun(
@@ skipping 180 matching lines @@
 }
 
 
 Handle<JSFunction> GetFunctionByName(Isolate* isolate, const char* name) {
   Handle<String> str = isolate->factory()->InternalizeUtf8String(name);
   Handle<Object> obj =
       Object::GetProperty(isolate->global_object(), str).ToHandleChecked();
   return Handle<JSFunction>::cast(obj);
 }
 
-void CheckIC(Handle<JSFunction> function, Code::Kind kind, int slot_index,
-             InlineCacheState state) {
+
+void CheckIC(Code* code, Code::Kind kind, SharedFunctionInfo* shared,
+             int slot_index, InlineCacheState state) {
   if (kind == Code::LOAD_IC || kind == Code::KEYED_LOAD_IC ||
       kind == Code::CALL_IC) {
-    TypeFeedbackVector* vector = function->feedback_vector();
+    TypeFeedbackVector* vector = shared->feedback_vector();
     FeedbackVectorSlot slot(slot_index);
     if (kind == Code::LOAD_IC) {
       LoadICNexus nexus(vector, slot);
       CHECK_EQ(nexus.StateFromFeedback(), state);
     } else if (kind == Code::KEYED_LOAD_IC) {
       KeyedLoadICNexus nexus(vector, slot);
       CHECK_EQ(nexus.StateFromFeedback(), state);
     } else if (kind == Code::CALL_IC) {
       CallICNexus nexus(vector, slot);
       CHECK_EQ(nexus.StateFromFeedback(), state);
     }
   } else {
-    Code* ic = FindFirstIC(function->code(), kind);
+    Code* ic = FindFirstIC(code, kind);
     CHECK(ic->is_inline_cache_stub());
     CHECK(ic->ic_state() == state);
   }
 }
 
 
 TEST(MonomorphicStaysMonomorphicAfterGC) {
   if (FLAG_always_opt) return;
   CcTest::InitializeVM();
   Isolate* isolate = CcTest::i_isolate();
@@ skipping 10 matching lines @@
       "  loadIC(obj);"
       "  loadIC(obj);"
       "  return proto;"
       "};");
   Handle<JSFunction> loadIC = GetFunctionByName(isolate, "loadIC");
   {
     v8::HandleScope scope(CcTest::isolate());
     CompileRun("(testIC())");
   }
   heap->CollectAllGarbage();
-  CheckIC(loadIC, Code::LOAD_IC, 0, MONOMORPHIC);
+  CheckIC(loadIC->code(), Code::LOAD_IC, loadIC->shared(), 0, MONOMORPHIC);
   {
     v8::HandleScope scope(CcTest::isolate());
     CompileRun("(testIC())");
   }
-  CheckIC(loadIC, Code::LOAD_IC, 0, MONOMORPHIC);
+  CheckIC(loadIC->code(), Code::LOAD_IC, loadIC->shared(), 0, MONOMORPHIC);
 }
 
 
 TEST(PolymorphicStaysPolymorphicAfterGC) {
   if (FLAG_always_opt) return;
   CcTest::InitializeVM();
   Isolate* isolate = CcTest::i_isolate();
   Heap* heap = isolate->heap();
   v8::HandleScope scope(CcTest::isolate());
   CompileRun(
@@ skipping 10 matching lines @@
       "  poly.x = true;"
       "  loadIC(poly);"
       "  return proto;"
       "};");
   Handle<JSFunction> loadIC = GetFunctionByName(isolate, "loadIC");
   {
     v8::HandleScope scope(CcTest::isolate());
     CompileRun("(testIC())");
   }
   heap->CollectAllGarbage();
-  CheckIC(loadIC, Code::LOAD_IC, 0, POLYMORPHIC);
+  CheckIC(loadIC->code(), Code::LOAD_IC, loadIC->shared(), 0, POLYMORPHIC);
   {
     v8::HandleScope scope(CcTest::isolate());
     CompileRun("(testIC())");
   }
-  CheckIC(loadIC, Code::LOAD_IC, 0, POLYMORPHIC);
+  CheckIC(loadIC->code(), Code::LOAD_IC, loadIC->shared(), 0, POLYMORPHIC);
 }
 
 
 TEST(WeakCell) {
   CcTest::InitializeVM();
   Isolate* isolate = CcTest::i_isolate();
   v8::internal::Heap* heap = CcTest::heap();
   v8::internal::Factory* factory = isolate->factory();
 
   HandleScope outer_scope(isolate);
@@ skipping 1081 matching lines @@
   isolate->IncrementJsCallsFromApiCounter();
   isolate->IncrementJsCallsFromApiCounter();
   isolate->IncrementJsCallsFromApiCounter();
   calls_per_ms = memory_reducer->SampleAndGetJsCallsPerMs(4);
   CheckDoubleEquals(2, calls_per_ms);
 }
 
 
 }  // namespace internal
 }  // namespace v8