--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/hotspot/src/share/vm/classfile/classLoaderStats.hpp Wed Jun 04 11:05:30 2014 +0200
@@ -0,0 +1,152 @@
+/*
+ * 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/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) {
+ unsigned hash = (unsigned)((uintptr_t)&s1);
+ return hash ^ (hash >> LogMinObjAlignment);
+ }
+
+ 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