jdk8-mips64-public/hotspot: src/share/vm/classfile/classLoaderStats.hpp@fd44df5e3bc3 (annotated)

src/share/vm/classfile/classLoaderStats.hpp@fd44df5e3bc3 (annotated)

src/share/vm/classfile/classLoaderStats.hpp

Wed, 14 Oct 2020 17:44:48 +0800

author: aoqi
date: Wed, 14 Oct 2020 17:44:48 +0800
changeset 9931: fd44df5e3bc3
parent 9918: 1848821ee85d
permissions: -rw-r--r--

Merge

 /*
  * Copyright (c) 2014, 2017, 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_CLASSFILE_CLASSLOADERSTATS_HPP
 #define SHARE_VM_CLASSFILE_CLASSLOADERSTATS_HPP
 #include "classfile/classLoaderData.hpp"
 #include "oops/klass.hpp"
 #include "oops/oopsHierarchy.hpp"
 #include "runtime/vm_operations.hpp"
 #include "services/diagnosticCommand.hpp"
 #include "utilities/resourceHash.hpp"
 class ClassLoaderStatsDCmd : public DCmd {
 public:
   ClassLoaderStatsDCmd(outputStream* output, bool heap) :
     DCmd(output, heap) {
   }
   static const char* name() {
     return "VM.classloader_stats";
   }
   static const char* description() {
     return "Print statistics about all ClassLoaders.";
   }
   static const char* impact() {
     return "Low";
   }
   virtual void execute(DCmdSource source, TRAPS);
   static int num_arguments() {
     return 0;
   }
   static const JavaPermission permission() {
     JavaPermission p = {"java.lang.management.ManagementPermission",
                         "monitor", NULL};
     return p;
   }
 };
 class ClassLoaderStats : public ResourceObj {
 public:
   ClassLoaderData*  _cld;
   oop               _class_loader;
   oop               _parent;
   size_t            _chunk_sz;
   size_t            _block_sz;
   uintx             _classes_count;
   size_t            _anon_chunk_sz;
   size_t            _anon_block_sz;
   uintx             _anon_classes_count;
   ClassLoaderStats() :
     _cld(0),
     _class_loader(0),
     _parent(0),
     _chunk_sz(0),
     _block_sz(0),
     _classes_count(0),
     _anon_block_sz(0),
     _anon_chunk_sz(0),
     _anon_classes_count(0) {
   }
 };
 class ClassLoaderStatsClosure : public CLDClosure {
 protected:
   static bool oop_equals(oop const& s1, oop const& s2) {
     return s1 == s2;
   }
   static unsigned oop_hash(oop const& s1) {
     // Robert Jenkins 1996 & Thomas Wang 1997
     // http://web.archive.org/web/20071223173210/http://www.concentric.net/~Ttwang/tech/inthash.htm
     uintptr_t tmp = cast_from_oop<uintptr_t>(s1);
     unsigned hash = (unsigned)tmp;
     hash = ~hash + (hash << 15);
     hash = hash ^ (hash >> 12);
     hash = hash + (hash << 2);
     hash = hash ^ (hash >> 4);
     hash = hash * 2057;
     hash = hash ^ (hash >> 16);
     return hash;
   }
   typedef ResourceHashtable<oop, ClassLoaderStats*,
       ClassLoaderStatsClosure::oop_hash, ClassLoaderStatsClosure::oop_equals> StatsTable;
   outputStream* _out;
   StatsTable* _stats;
   uintx   _total_loaders;
   uintx   _total_classes;
   size_t  _total_chunk_sz;
   size_t  _total_block_sz;
 public:
   ClassLoaderStatsClosure(outputStream* out) :
     _out(out),
     _total_loaders(0),
     _total_block_sz(0),
     _total_chunk_sz(0),
     _total_classes(0),
     _stats(new StatsTable()) {
   }
   virtual void do_cld(ClassLoaderData* cld);
   virtual bool do_entry(oop const& key, ClassLoaderStats* const& cls);
   void print();
 private:
   void addEmptyParents(oop cl);
 };
 class ClassLoaderStatsVMOperation : public VM_Operation {
   outputStream* _out;
 public:
   ClassLoaderStatsVMOperation(outputStream* out) :
     _out(out) {
   }
   VMOp_Type type() const {
     return VMOp_ClassLoaderStatsOperation;
   }
   void doit();
 };
 #endif // SHARE_VM_CLASSFILE_CLASSLOADERSTATS_HPP

Mercurial > jdk8-mips64-public > hotspot / annotate

src/share/vm/classfile/classLoaderStats.hpp@fd44df5e3bc3 (annotated)

src/share/vm/classfile/classLoaderStats.hpp