1 files changed, 96 insertions, 0 deletions
diff --git a/deps/v8/test/cctest/test-local-handles.cc b/deps/v8/test/cctest/test-local-handles.cc
new file mode 100644
index 0000000000..0e4fc5c7d1
--- /dev/null
+++ b/deps/v8/test/cctest/test-local-handles.cc
@@ -0,0 +1,96 @@
+// Copyright 2020 the V8 project authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include <memory>
+
+#include "src/api/api.h"
+#include "src/base/platform/condition-variable.h"
+#include "src/base/platform/mutex.h"
+#include "src/base/platform/semaphore.h"
+#include "src/handles/handles-inl.h"
+#include "src/handles/local-handles-inl.h"
+#include "src/heap/heap.h"
+#include "src/heap/local-heap.h"
+#include "src/heap/safepoint.h"
+#include "src/objects/heap-number.h"
+#include "test/cctest/cctest.h"
+#include "test/cctest/heap/heap-utils.h"
+
+namespace v8 {
+namespace internal {
+
+class LocalHandlesThread final : public v8::base::Thread {
+ public:
+  LocalHandlesThread(Heap* heap, Address object, base::Semaphore* sema_started,
+                     base::Semaphore* sema_gc_finished)
+      : v8::base::Thread(base::Thread::Options("ThreadWithLocalHeap")),
+        heap_(heap),
+        object_(object),
+        sema_started_(sema_started),
+        sema_gc_finished_(sema_gc_finished) {}
+
+  void Run() override {
+    LocalHeap local_heap(heap_);
+    LocalHandleScope scope(&local_heap);
+
+    static constexpr int kNumHandles =
+        kHandleBlockSize * 2 + kHandleBlockSize / 2;
+
+    std::vector<Handle<HeapNumber>> handles;
+    handles.reserve(kNumHandles);
+
+    for (int i = 0; i < kNumHandles; i++) {
+      Handle<HeapNumber> number = handle(
+          HeapNumber::cast(HeapObject::FromAddress(object_)), &local_heap);
+      handles.push_back(number);
+    }
+
+    sema_started_->Signal();
+
+    {
+      ParkedScope scope(&local_heap);
+      sema_gc_finished_->Wait();
+    }
+
+    for (Handle<HeapNumber> handle : handles) {
+      CHECK_EQ(42.0, handle->value());
+    }
+  }
+
+  Heap* heap_;
+  Address object_;
+  base::Semaphore* sema_started_;
+  base::Semaphore* sema_gc_finished_;
+};
+
+TEST(CreateLocalHandles) {
+  CcTest::InitializeVM();
+  FLAG_local_heaps = true;
+  Isolate* isolate = CcTest::i_isolate();
+
+  Address object = kNullAddress;
+
+  {
+    HandleScope handle_scope(isolate);
+    Handle<HeapNumber> number = isolate->factory()->NewHeapNumber(42.0);
+    object = (*number).address();
+  }
+
+  base::Semaphore sema_started(0);
+  base::Semaphore sema_gc_finished(0);
+
+  std::unique_ptr<LocalHandlesThread> thread(new LocalHandlesThread(
+      isolate->heap(), object, &sema_started, &sema_gc_finished));
+  CHECK(thread->Start());
+
+  sema_started.Wait();
+
+  CcTest::CollectAllGarbage();
+  sema_gc_finished.Signal();
+
+  thread->Join();
+}
+
+}  // namespace internal
+}  // namespace v8