Revert of Remove the weak list of array buffers

test/cctest/test-weaktypedarrays.cc

Index: test/cctest/test-weaktypedarrays.cc
diff --git a/test/cctest/test-weaktypedarrays.cc b/test/cctest/test-weaktypedarrays.cc
new file mode 100644
index 0000000000000000000000000000000000000000..c0d2950432eab068257408fa9e3e4424041cd8b2
--- /dev/null
+++ b/test/cctest/test-weaktypedarrays.cc
@@ -0,0 +1,124 @@
+// 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
+//       with the distribution.
+//     * Neither the name of Google Inc. nor the names of its
+//       contributors may be used to endorse or promote products derived
+//       from this software without specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+#include <stdlib.h>
+
+#include "src/v8.h"
+#include "test/cctest/cctest.h"
+
+#include "src/api.h"
+#include "src/heap/heap.h"
+#include "src/objects.h"
+
+using namespace v8::internal;
+
+static Isolate* GetIsolateFrom(LocalContext* context) {
+  return reinterpret_cast<Isolate*>((*context)->GetIsolate());
+}
+
+
+static int CountArrayBuffersInWeakList(Heap* heap) {
+  int count = 0;
+  for (Object* o = heap->array_buffers_list();
+       !o->IsUndefined();
+       o = JSArrayBuffer::cast(o)->weak_next()) {
+    count++;
+  }
+  return count;
+}
+
+
+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;
+}
+
+
+TEST(WeakArrayBuffersFromScript) {
+  v8::V8::Initialize();
+  LocalContext context;
+  Isolate* isolate = GetIsolateFrom(&context);
+  int start = CountArrayBuffersInWeakList(isolate->heap());
+
+  for (int i = 1; i <= 3; i++) {
+    // Create 3 array buffers, make i-th of them garbage,
+    // validate correct state of array buffer weak list.
+    CHECK_EQ(start, CountArrayBuffersInWeakList(isolate->heap()));
+    {
+      v8::HandleScope scope(context->GetIsolate());
+
+      {
+        v8::HandleScope s1(context->GetIsolate());
+        CompileRun("var ab1 = new ArrayBuffer(256);"
+                   "var ab2 = new ArrayBuffer(256);"
+                   "var ab3 = new ArrayBuffer(256);");
+        v8::Handle<v8::ArrayBuffer> ab1 =
+            v8::Handle<v8::ArrayBuffer>::Cast(CompileRun("ab1"));
+        v8::Handle<v8::ArrayBuffer> ab2 =
+            v8::Handle<v8::ArrayBuffer>::Cast(CompileRun("ab2"));
+        v8::Handle<v8::ArrayBuffer> ab3 =
+            v8::Handle<v8::ArrayBuffer>::Cast(CompileRun("ab3"));
+
+        CHECK_EQ(3, CountArrayBuffersInWeakList(isolate->heap()) - start);
+        CHECK(HasArrayBufferInWeakList(isolate->heap(),
+              *v8::Utils::OpenHandle(*ab1)));
+        CHECK(HasArrayBufferInWeakList(isolate->heap(),
+              *v8::Utils::OpenHandle(*ab2)));
+        CHECK(HasArrayBufferInWeakList(isolate->heap(),
+              *v8::Utils::OpenHandle(*ab3)));
+      }
+
+      i::ScopedVector<char> source(1024);
+      i::SNPrintF(source, "ab%d = null;", i);
+      CompileRun(source.start());
+      isolate->heap()->CollectAllGarbage();
+
+      CHECK_EQ(2, CountArrayBuffersInWeakList(isolate->heap()) - start);
+
+      {
+        v8::HandleScope s2(context->GetIsolate());
+        for (int j = 1; j <= 3; j++) {
+          if (j == i) continue;
+          i::SNPrintF(source, "ab%d", j);
+          v8::Handle<v8::ArrayBuffer> ab =
+              v8::Handle<v8::ArrayBuffer>::Cast(CompileRun(source.start()));
+          CHECK(HasArrayBufferInWeakList(isolate->heap(),
+                *v8::Utils::OpenHandle(*ab)));
+          }
+      }
+
+      CompileRun("ab1 = null; ab2 = null; ab3 = null;");
+    }
+
+    isolate->heap()->CollectAllGarbage();
+    CHECK_EQ(start, CountArrayBuffersInWeakList(isolate->heap()));
+  }
+}