| /* |
| * Copyright (c) 2014, 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/vmOperations.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 |