deps: update V8 to 7.7.299.4

PR-URL: https://github.com/nodejs/node/pull/28918
Reviewed-By: Colin Ihrig <cjihrig@gmail.com>
Reviewed-By: Ben Noordhuis <info@bnoordhuis.nl>
Reviewed-By: Jiawen Geng <technicalcute@gmail.com>
Reviewed-By: Rich Trott <rtrott@gmail.com>

1 files changed, 31 insertions, 0 deletions

diff --git a/deps/v8/src/heap/read-only-heap-inl.h b/deps/v8/src/heap/read-only-heap-inl.h
new file mode 100644
index 0000000000..c725b4bca8
--- /dev/null
+++ b/deps/v8/src/heap/read-only-heap-inl.h
@@ -0,0 +1,31 @@
+// Copyright 2019 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.
+
+#ifndef V8_HEAP_READ_ONLY_HEAP_INL_H_
+#define V8_HEAP_READ_ONLY_HEAP_INL_H_
+
+#include "src/heap/read-only-heap.h"
+
+#include "src/execution/isolate-utils-inl.h"
+#include "src/roots/roots-inl.h"
+
+namespace v8 {
+namespace internal {
+
+// static
+ReadOnlyRoots ReadOnlyHeap::GetReadOnlyRoots(HeapObject object) {
+#ifdef V8_SHARED_RO_HEAP
+  // This fails if we are creating heap objects and the roots haven't yet been
+  // copied into the read-only heap or it has been cleared for testing.
+  if (shared_ro_heap_ != nullptr && shared_ro_heap_->init_complete_) {
+    return ReadOnlyRoots(shared_ro_heap_->read_only_roots_);
+  }
+#endif
+  return ReadOnlyRoots(GetHeapFromWritableObject(object));
+}
+
+}  // namespace internal
+}  // namespace v8
+
+#endif  // V8_HEAP_READ_ONLY_HEAP_INL_H_