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

src/share/vm/jfr/leakprofiler/chains/edgeStore.hpp@8e875c964f41 (annotated)

src/share/vm/jfr/leakprofiler/chains/edgeStore.hpp

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.
  *
  */
 #ifndef SHARE_VM_LEAKPROFILER_CHAINS_EDGESTORE_HPP
 #define SHARE_VM_LEAKPROFILER_CHAINS_EDGESTORE_HPP
 #include "jfr/leakprofiler/chains/edge.hpp"
 #include "jfr/utilities/jfrHashtable.hpp"
 #include "memory/allocation.hpp"
 typedef u8 traceid;
 class StoredEdge : public Edge {
  private:
   mutable traceid _gc_root_id;
   size_t _skip_length;
  public:
   StoredEdge();
   StoredEdge(const Edge* parent, const oop* reference);
   StoredEdge(const Edge& edge);
   StoredEdge(const StoredEdge& edge);
   void operator=(const StoredEdge& edge);
   traceid gc_root_id() const { return _gc_root_id; }
   void set_gc_root_id(traceid root_id) const { _gc_root_id = root_id; }
   bool is_skip_edge() const { return _skip_length != 0; }
   size_t skip_length() const { return _skip_length; }
   void set_skip_length(size_t length) { _skip_length = length; }
   void set_parent(const Edge* edge) { this->_parent = edge; }
   StoredEdge* parent() const {
     return const_cast<StoredEdge*>(static_cast<const StoredEdge*>(Edge::parent()));
   }
 };
 class EdgeStore : public CHeapObj<mtTracing> {
   typedef HashTableHost<StoredEdge, traceid, Entry, EdgeStore> EdgeHashTable;
   typedef EdgeHashTable::HashEntry EdgeEntry;
   template <typename,
             typename,
             template<typename, typename> class,
             typename,
             size_t>
   friend class HashTableHost;
   friend class EventEmitter;
   friend class ObjectSampleWriter;
   friend class ObjectSampleCheckpoint;
  private:
   static traceid _edge_id_counter;
   EdgeHashTable* _edges;
   // Hash table callbacks
   void assign_id(EdgeEntry* entry);
   bool equals(const Edge& query, uintptr_t hash, const EdgeEntry* entry);
   StoredEdge* get(const oop* reference) const;
   StoredEdge* put(const oop* reference);
   traceid gc_root_id(const Edge* edge) const;
   bool put_edges(StoredEdge** previous, const Edge** current, size_t length);
   bool put_skip_edge(StoredEdge** previous, const Edge** current, size_t distance_to_root);
   void put_chain_epilogue(StoredEdge* leak_context_edge, const Edge* root) const;
   StoredEdge* associate_leak_context_with_candidate(const Edge* edge);
   void store_gc_root_id_in_leak_context_edge(StoredEdge* leak_context_edge, const Edge* root) const;
   StoredEdge* link_new_edge(StoredEdge** previous, const Edge** current);
   void link_with_existing_chain(const StoredEdge* current_stored, StoredEdge** previous, size_t previous_length);
   template <typename T>
   void iterate(T& functor) const { _edges->iterate_value<T>(functor); }
   DEBUG_ONLY(bool contains(const oop* reference) const;)
  public:
   EdgeStore();
   ~EdgeStore();
   bool is_empty() const;
   traceid get_id(const Edge* edge) const;
   void put_chain(const Edge* chain, size_t length);
 };
 #endif // SHARE_VM_LEAKPROFILER_CHAINS_EDGESTORE_HPP

Mercurial > jdk8-mips64-public > hotspot / annotate

src/share/vm/jfr/leakprofiler/chains/edgeStore.hpp@8e875c964f41 (annotated)

src/share/vm/jfr/leakprofiler/chains/edgeStore.hpp