Reland Just visit young array buffers during scavenge.

test/cctest/test-weaktypedarrays.cc

 // Copyright 2013 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 44 matching lines @@
 static bool HasArrayBufferInWeakList(Heap* heap, JSArrayBuffer* ab) {
   for (Object* o = heap->array_buffers_list();
        !o->IsUndefined();
        o = JSArrayBuffer::cast(o)->weak_next()) {
     if (ab == o) return true;
   }
   return false;
 }
 
 
-static int CountViews(JSArrayBuffer* array_buffer) {
+static int CountViewsInNewSpaceList(Heap* heap, JSArrayBuffer* array_buffer) {
+  int count = 0;
+  for (Object* o = heap->new_array_buffer_views_list(); !o->IsUndefined();) {
+    JSArrayBufferView* view = JSArrayBufferView::cast(o);
+    if (array_buffer == view->buffer()) {
+      count++;
+    }
+    o = view->weak_next();
+  }
+  return count;
+}
+
+
+static int CountViews(Heap* heap, JSArrayBuffer* array_buffer) {
   int count = 0;
   for (Object* o = array_buffer->weak_first_view();
        !o->IsUndefined();
        o = JSArrayBufferView::cast(o)->weak_next()) {
     count++;
   }
 
-  return count;
+  return count + CountViewsInNewSpaceList(heap, array_buffer);
 }
 
-static bool HasViewInWeakList(JSArrayBuffer* array_buffer,
-                              JSArrayBufferView* ta) {
-  for (Object* o = array_buffer->weak_first_view();
-       !o->IsUndefined();
+
+static bool HasViewInNewSpaceList(Heap* heap, JSArrayBufferView* ta) {
+  for (Object* o = heap->new_array_buffer_views_list(); !o->IsUndefined();
        o = JSArrayBufferView::cast(o)->weak_next()) {
     if (ta == o) return true;
   }
   return false;
 }
 
 
+static bool HasViewInWeakList(Heap* heap, JSArrayBuffer* array_buffer,
+                              JSArrayBufferView* ta) {
+  for (Object* o = array_buffer->weak_first_view();
+       !o->IsUndefined();
+       o = JSArrayBufferView::cast(o)->weak_next()) {
+    if (ta == o) return true;
+  }
+  return HasViewInNewSpaceList(heap, ta);
+}
+
+
 TEST(WeakArrayBuffersFromApi) {
   v8::V8::Initialize();
   LocalContext context;
   Isolate* isolate = GetIsolateFrom(&context);
 
   int start = CountArrayBuffersInWeakList(isolate->heap());
   {
     v8::HandleScope s1(context->GetIsolate());
     v8::Handle<v8::ArrayBuffer> ab1 =
         v8::ArrayBuffer::New(context->GetIsolate(), 256);
@@ skipping 96 matching lines @@
   Handle<JSArrayBuffer> iab = v8::Utils::OpenHandle(*ab);
   {
     v8::HandleScope s2(context->GetIsolate());
     v8::Handle<View> ta1 = View::New(ab, 0, 256);
     {
       v8::HandleScope s3(context->GetIsolate());
       v8::Handle<View> ta2 = View::New(ab, 0, 128);
 
       Handle<JSArrayBufferView> ita1 = v8::Utils::OpenHandle(*ta1);
       Handle<JSArrayBufferView> ita2 = v8::Utils::OpenHandle(*ta2);
-      CHECK_EQ(2, CountViews(*iab));
-      CHECK(HasViewInWeakList(*iab, *ita1));
-      CHECK(HasViewInWeakList(*iab, *ita2));
+      CHECK_EQ(2, CountViews(isolate->heap(), *iab));
+      CHECK(HasViewInWeakList(isolate->heap(), *iab, *ita1));
+      CHECK(HasViewInWeakList(isolate->heap(), *iab, *ita2));
     }
     isolate->heap()->CollectAllGarbage(Heap::kAbortIncrementalMarkingMask);
-    CHECK_EQ(1, CountViews(*iab));
+    CHECK_EQ(1, CountViews(isolate->heap(), *iab));
     Handle<JSArrayBufferView> ita1 = v8::Utils::OpenHandle(*ta1);
-    CHECK(HasViewInWeakList(*iab, *ita1));
+    CHECK(HasViewInWeakList(isolate->heap(), *iab, *ita1));
   }
   isolate->heap()->CollectAllGarbage(Heap::kAbortIncrementalMarkingMask);
 
-  CHECK_EQ(0, CountViews(*iab));
+  CHECK_EQ(0, CountViews(isolate->heap(), *iab));
 }
 
 
 TEST(Uint8ArrayFromApi) {
   TestViewFromApi<v8::Uint8Array>();
 }
 
 
 TEST(Int8ArrayFromApi) {
   TestViewFromApi<v8::Int8Array>();
@@ skipping 67 matching lines @@
       v8::Handle<v8::ArrayBuffer> ab =
           v8::Handle<v8::ArrayBuffer>::Cast(CompileRun("ab"));
       v8::Handle<TypedArray> ta1 =
           v8::Handle<TypedArray>::Cast(CompileRun("ta1"));
       v8::Handle<TypedArray> ta2 =
           v8::Handle<TypedArray>::Cast(CompileRun("ta2"));
       v8::Handle<TypedArray> ta3 =
           v8::Handle<TypedArray>::Cast(CompileRun("ta3"));
       CHECK_EQ(1, CountArrayBuffersInWeakList(isolate->heap()) - start);
       Handle<JSArrayBuffer> iab = v8::Utils::OpenHandle(*ab);
-      CHECK_EQ(3, CountViews(*iab));
-      CHECK(HasViewInWeakList(*iab, *v8::Utils::OpenHandle(*ta1)));
-      CHECK(HasViewInWeakList(*iab, *v8::Utils::OpenHandle(*ta2)));
-      CHECK(HasViewInWeakList(*iab, *v8::Utils::OpenHandle(*ta3)));
+      CHECK_EQ(3, CountViews(isolate->heap(), *iab));
+      CHECK(HasViewInWeakList(isolate->heap(), *iab,
+                              *v8::Utils::OpenHandle(*ta1)));
+      CHECK(HasViewInWeakList(isolate->heap(), *iab,
+                              *v8::Utils::OpenHandle(*ta2)));
+      CHECK(HasViewInWeakList(isolate->heap(), *iab,
+                              *v8::Utils::OpenHandle(*ta3)));
     }
 
     i::SNPrintF(source, "ta%d = null;", i);
     CompileRun(source.start());
     isolate->heap()->CollectAllGarbage(Heap::kAbortIncrementalMarkingMask);
 
     CHECK_EQ(1, CountArrayBuffersInWeakList(isolate->heap()) - start);
 
     {
       v8::HandleScope s2(context->GetIsolate());
       v8::Handle<v8::ArrayBuffer> ab =
           v8::Handle<v8::ArrayBuffer>::Cast(CompileRun("ab"));
       Handle<JSArrayBuffer> iab = v8::Utils::OpenHandle(*ab);
-      CHECK_EQ(2, CountViews(*iab));
+      CHECK_EQ(2, CountViews(isolate->heap(), *iab));
       for (int j = 1; j <= 3; j++) {
         if (j == i) continue;
         i::SNPrintF(source, "ta%d", j);
         v8::Handle<TypedArray> ta =
             v8::Handle<TypedArray>::Cast(CompileRun(source.start()));
-        CHECK(HasViewInWeakList(*iab, *v8::Utils::OpenHandle(*ta)));
+        CHECK(HasViewInWeakList(isolate->heap(), *iab,
+                                *v8::Utils::OpenHandle(*ta)));
       }
     }
 
     CompileRun("ta1 = null; ta2 = null; ta3 = null;");
     isolate->heap()->CollectAllGarbage(Heap::kAbortIncrementalMarkingMask);
 
     CHECK_EQ(1, CountArrayBuffersInWeakList(isolate->heap()) - start);
 
     {
       v8::HandleScope s3(context->GetIsolate());
       v8::Handle<v8::ArrayBuffer> ab =
           v8::Handle<v8::ArrayBuffer>::Cast(CompileRun("ab"));
       Handle<JSArrayBuffer> iab = v8::Utils::OpenHandle(*ab);
-      CHECK_EQ(0, CountViews(*iab));
+      CHECK_EQ(0, CountViews(isolate->heap(), *iab));
     }
   }
 }
 
 
 TEST(Uint8ArrayFromScript) {
   TestTypedArrayFromScript<v8::Uint8Array>("Uint8Array");
 }
 
 
@@ skipping 33 matching lines @@
 
 
 TEST(Uint8ClampedArrayFromScript) {
   TestTypedArrayFromScript<v8::Uint8ClampedArray>("Uint8ClampedArray");
 }
 
 
 TEST(DataViewFromScript) {
   TestTypedArrayFromScript<v8::DataView>("DataView");
 }