jdk8-mips64-public/hotspot: src/share/vm/jfr/leakprofiler/chains/rootSetClosure.cpp@8e875c964f41 (annotated)

src/share/vm/jfr/leakprofiler/chains/rootSetClosure.cpp@8e875c964f41 (annotated)

src/share/vm/jfr/leakprofiler/chains/rootSetClosure.cpp

Wed, 09 Oct 2019 16:11:58 +0800

author: ddong
date: Wed, 09 Oct 2019 16:11:58 +0800
changeset 9885: 8e875c964f41
parent 9858: b985cbb00e68
permissions: -rw-r--r--

8214542: JFR: Old Object Sample event slow on a deep heap in debug builds
Reviewed-by: egahlin, rwestberg

 /*
  * 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 "classfile/classLoaderData.hpp"
 #include "classfile/systemDictionary.hpp"
 #include "jfr/leakprofiler/chains/bfsClosure.hpp"
 #include "jfr/leakprofiler/chains/dfsClosure.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/oop.inline.hpp"
 #include "prims/jvmtiExport.hpp"
 #include "runtime/jniHandles.hpp"
 #include "runtime/synchronizer.hpp"
 #include "runtime/thread.hpp"
 #include "services/management.hpp"
 #include "utilities/align.hpp"
 template <typename Delegate>
 RootSetClosure<Delegate>::RootSetClosure(Delegate* delegate) : _delegate(delegate) {}
 template <typename Delegate>
 void RootSetClosure<Delegate>::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");
   if (*ref != NULL) {
     _delegate->do_root(ref);
   }
 }
 template <typename Delegate>
 void RootSetClosure<Delegate>::do_oop(narrowOop* ref) {
   assert(ref != NULL, "invariant");
   assert(is_aligned(ref, sizeof(narrowOop)), "invariant");
   const oop pointee = oopDesc::load_decode_heap_oop(ref);
   if (pointee != NULL) {
     _delegate->do_root(UnifiedOop::encode(ref));
   }
 }
 class RootSetClosureMarkScope : public MarkingCodeBlobClosure::MarkScope {};
 template <typename Delegate>
 void RootSetClosure<Delegate>::process() {
   RootSetClosureMarkScope mark_scope;
   CLDToOopClosure cldt_closure(this);
   ClassLoaderDataGraph::always_strong_cld_do(&cldt_closure);
   CodeBlobToOopClosure blobs(this, false);
   Threads::oops_do(this, NULL, &blobs); // XXX set CLDClosure to NULL
   ObjectSynchronizer::oops_do(this);
   Universe::oops_do(this);
   JNIHandles::oops_do(this);
   JvmtiExport::oops_do(this);
   SystemDictionary::oops_do(this);
   Management::oops_do(this);
   StringTable::oops_do(this);
 }
 template class RootSetClosure<BFSClosure>;
 template class RootSetClosure<DFSClosure>;

Mercurial > jdk8-mips64-public > hotspot / annotate

src/share/vm/jfr/leakprofiler/chains/rootSetClosure.cpp@8e875c964f41 (annotated)

src/share/vm/jfr/leakprofiler/chains/rootSetClosure.cpp