--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/hotspot/share/jfr/leakprofiler/chains/rootSetClosure.cpp	Tue May 15 20:24:34 2018 +0200
@@ -0,0 +1,107 @@
+/*
+ * Copyright (c) 2014, 2018, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ *
+ */
+
+#include "precompiled.hpp"
+#include "aot/aotLoader.hpp"
+#include "classfile/classLoaderData.hpp"
+#include "classfile/stringTable.hpp"
+#include "classfile/systemDictionary.hpp"
+#include "gc/shared/strongRootsScope.hpp"
+#include "jfr/leakprofiler/chains/edgeQueue.hpp"
+#include "jfr/leakprofiler/chains/rootSetClosure.hpp"
+#include "jfr/leakprofiler/utilities/saveRestore.hpp"
+#include "jfr/leakprofiler/utilities/unifiedOop.hpp"
+#include "memory/universe.hpp"
+#include "oops/access.inline.hpp"
+#include "prims/jvmtiExport.hpp"
+#include "runtime/jniHandles.inline.hpp"
+#include "runtime/synchronizer.hpp"
+#include "runtime/thread.hpp"
+#include "services/management.hpp"
+#include "utilities/align.hpp"
+
+RootSetClosure::RootSetClosure(EdgeQueue* edge_queue) :
+  _edge_queue(edge_queue) {
+}
+
+void RootSetClosure::do_oop(oop* ref) {
+  assert(ref != NULL, "invariant");
+  // We discard unaligned root references because
+  // our reference tagging scheme will use
+  // the lowest bit in a represented reference
+  // to indicate the reference is narrow.
+  // It is mainly roots delivered via nmethods::do_oops()
+  // that come in unaligned. It should be ok to duck these
+  // since they are supposedly weak.
+  if (!is_aligned(ref, HeapWordSize)) {
+    return;
+  }
+
+  assert(is_aligned(ref, HeapWordSize), "invariant");
+  const oop pointee = *ref;
+  if (pointee != NULL) {
+    closure_impl(ref, pointee);
+  }
+}
+
+void RootSetClosure::do_oop(narrowOop* ref) {
+  assert(ref != NULL, "invariant");
+  assert(is_aligned(ref, sizeof(narrowOop)), "invariant");
+  const oop pointee = RawAccess<>::oop_load(ref);
+  if (pointee != NULL) {
+    closure_impl(UnifiedOop::encode(ref), pointee);
+  }
+}
+
+void RootSetClosure::closure_impl(const oop* reference, const oop pointee) {
+  if (!_edge_queue->is_full())  {
+    _edge_queue->add(NULL, reference);
+  }
+}
+
+void RootSetClosure::add_to_queue(EdgeQueue* edge_queue) {
+  RootSetClosure rs(edge_queue);
+  process_roots(&rs);
+}
+
+class RootSetClosureMarkScope : public MarkScope {
+};
+
+void RootSetClosure::process_roots(OopClosure* closure) {
+  SaveRestoreCLDClaimBits save_restore_cld_claim_bits;
+  RootSetClosureMarkScope mark_scope;
+
+  CLDToOopClosure cldt_closure(closure);
+  ClassLoaderDataGraph::always_strong_cld_do(&cldt_closure);
+  CodeBlobToOopClosure blobs(closure, false);
+  Threads::oops_do(closure, &blobs);
+  ObjectSynchronizer::oops_do(closure);
+  Universe::oops_do(closure);
+  JNIHandles::oops_do(closure);
+  JvmtiExport::oops_do(closure);
+  SystemDictionary::always_strong_oops_do(closure);
+  Management::oops_do(closure);
+  StringTable::oops_do(closure);
+  AOTLoader::oops_do(closure);
+}