apetushkov@9858: /*
apetushkov@9858:  * Copyright (c) 2014, 2018, Oracle and/or its affiliates. All rights reserved.
apetushkov@9858:  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
apetushkov@9858:  *
apetushkov@9858:  * This code is free software; you can redistribute it and/or modify it
apetushkov@9858:  * under the terms of the GNU General Public License version 2 only, as
apetushkov@9858:  * published by the Free Software Foundation.
apetushkov@9858:  *
apetushkov@9858:  * This code is distributed in the hope that it will be useful, but WITHOUT
apetushkov@9858:  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
apetushkov@9858:  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
apetushkov@9858:  * version 2 for more details (a copy is included in the LICENSE file that
apetushkov@9858:  * accompanied this code).
apetushkov@9858:  *
apetushkov@9858:  * You should have received a copy of the GNU General Public License version
apetushkov@9858:  * 2 along with this work; if not, write to the Free Software Foundation,
apetushkov@9858:  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
apetushkov@9858:  *
apetushkov@9858:  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
apetushkov@9858:  * or visit www.oracle.com if you need additional information or have any
apetushkov@9858:  * questions.
apetushkov@9858:  *
apetushkov@9858:  */
apetushkov@9858: 
apetushkov@9858: #include "precompiled.hpp"
apetushkov@9858: #include "classfile/classLoaderData.hpp"
apetushkov@9858: #include "classfile/systemDictionary.hpp"
ddong@9885: #include "jfr/leakprofiler/chains/bfsClosure.hpp"
ddong@9885: #include "jfr/leakprofiler/chains/dfsClosure.hpp"
apetushkov@9858: #include "jfr/leakprofiler/chains/edgeQueue.hpp"
apetushkov@9858: #include "jfr/leakprofiler/chains/rootSetClosure.hpp"
apetushkov@9858: #include "jfr/leakprofiler/utilities/saveRestore.hpp"
apetushkov@9858: #include "jfr/leakprofiler/utilities/unifiedOop.hpp"
apetushkov@9858: #include "memory/universe.hpp"
ddong@9885: #include "oops/oop.inline.hpp"
apetushkov@9858: #include "prims/jvmtiExport.hpp"
apetushkov@9858: #include "runtime/jniHandles.hpp"
apetushkov@9858: #include "runtime/synchronizer.hpp"
apetushkov@9858: #include "runtime/thread.hpp"
apetushkov@9858: #include "services/management.hpp"
apetushkov@9858: #include "utilities/align.hpp"
apetushkov@9858: 
ddong@9885: template <typename Delegate>
ddong@9885: RootSetClosure<Delegate>::RootSetClosure(Delegate* delegate) : _delegate(delegate) {}
apetushkov@9858: 
ddong@9885: template <typename Delegate>
ddong@9885: void RootSetClosure<Delegate>::do_oop(oop* ref) {
apetushkov@9858:   assert(ref != NULL, "invariant");
apetushkov@9858:   // We discard unaligned root references because
apetushkov@9858:   // our reference tagging scheme will use
apetushkov@9858:   // the lowest bit in a represented reference
apetushkov@9858:   // to indicate the reference is narrow.
apetushkov@9858:   // It is mainly roots delivered via nmethods::do_oops()
apetushkov@9858:   // that come in unaligned. It should be ok to duck these
apetushkov@9858:   // since they are supposedly weak.
apetushkov@9858:   if (!is_aligned(ref, HeapWordSize)) {
apetushkov@9858:     return;
apetushkov@9858:   }
apetushkov@9858: 
apetushkov@9858:   assert(is_aligned(ref, HeapWordSize), "invariant");
ddong@9885:   if (*ref != NULL) {
ddong@9885:     _delegate->do_root(ref);
apetushkov@9858:   }
apetushkov@9858: }
apetushkov@9858: 
ddong@9885: template <typename Delegate>
ddong@9885: void RootSetClosure<Delegate>::do_oop(narrowOop* ref) {
apetushkov@9858:   assert(ref != NULL, "invariant");
apetushkov@9858:   assert(is_aligned(ref, sizeof(narrowOop)), "invariant");
apetushkov@9858:   const oop pointee = oopDesc::load_decode_heap_oop(ref);
apetushkov@9858:   if (pointee != NULL) {
ddong@9885:     _delegate->do_root(UnifiedOop::encode(ref));
apetushkov@9858:   }
apetushkov@9858: }
apetushkov@9858: 
ddong@9885: class RootSetClosureMarkScope : public MarkingCodeBlobClosure::MarkScope {};
ddong@9885: 
ddong@9885: template <typename Delegate>
ddong@9885: void RootSetClosure<Delegate>::process() {
ddong@9885:   RootSetClosureMarkScope mark_scope;
ddong@9885:   CLDToOopClosure cldt_closure(this);
ddong@9885:   ClassLoaderDataGraph::always_strong_cld_do(&cldt_closure);
ddong@9885:   CodeBlobToOopClosure blobs(this, false);
ddong@9885:   Threads::oops_do(this, NULL, &blobs); // XXX set CLDClosure to NULL
ddong@9885:   ObjectSynchronizer::oops_do(this);
ddong@9885:   Universe::oops_do(this);
ddong@9885:   JNIHandles::oops_do(this);
ddong@9885:   JvmtiExport::oops_do(this);
ddong@9885:   SystemDictionary::oops_do(this);
ddong@9885:   Management::oops_do(this);
ddong@9885:   StringTable::oops_do(this);
apetushkov@9858: }
apetushkov@9858: 
ddong@9885: template class RootSetClosure<BFSClosure>;
ddong@9885: template class RootSetClosure<DFSClosure>;