Mercurial > jdk8-mips64-public > hotspot / file revision

 /*

  * 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.

  *

  */

 #include "precompiled.hpp"

 #include "classfile/classLoaderStats.hpp"

 #include "utilities/globalDefinitions.hpp"

 class ClassStatsClosure : public KlassClosure {

 public:

   int _num_classes;

   ClassStatsClosure() :

     _num_classes(0) {

   }

   virtual void do_klass(Klass* k) {

     _num_classes++;

   }

 };

 void ClassLoaderStatsClosure::do_cld(ClassLoaderData* cld) {

   oop cl = cld->class_loader();

   ClassLoaderStats* cls;

   // The hashtable key is the ClassLoader oop since we want to account

   // for "real" classes and anonymous classes together

   ClassLoaderStats** cls_ptr = _stats->get(cl);

   if (cls_ptr == NULL) {

     cls = new ClassLoaderStats();

     _stats->put(cl, cls);

     _total_loaders++;

   } else {

     cls = *cls_ptr;

   }

   if (!cld->is_anonymous()) {

     cls->_cld = cld;

   }

   cls->_class_loader = cl;

   if (cl != NULL) {

     cls->_parent = java_lang_ClassLoader::parent(cl);

     addEmptyParents(cls->_parent);

   }

   ClassStatsClosure csc;

   cld->classes_do(&csc);

   if(cld->is_anonymous()) {

     cls->_anon_classes_count += csc._num_classes;

   } else {

     cls->_classes_count = csc._num_classes;

   }

   _total_classes += csc._num_classes;

   Metaspace* ms = cld->metaspace_or_null();

   if (ms != NULL) {

     if(cld->is_anonymous()) {

       cls->_anon_chunk_sz += ms->allocated_chunks_bytes();

       cls->_anon_block_sz += ms->allocated_blocks_bytes();

     } else {

       cls->_chunk_sz = ms->allocated_chunks_bytes();

       cls->_block_sz = ms->allocated_blocks_bytes();

     }

     _total_chunk_sz += ms->allocated_chunks_bytes();

     _total_block_sz += ms->allocated_blocks_bytes();

   }

 }

 // Handles the difference in pointer width on 32 and 64 bit platforms

 #ifdef _LP64

   #define SPACE "%8s"

 #else

   #define SPACE "%s"

 #endif

 bool ClassLoaderStatsClosure::do_entry(oop const& key, ClassLoaderStats* const& cls) {

   Klass* class_loader_klass = (cls->_class_loader == NULL ? NULL : cls->_class_loader->klass());

   Klass* parent_klass = (cls->_parent == NULL ? NULL : cls->_parent->klass());

   _out->print(INTPTR_FORMAT "  " INTPTR_FORMAT "  " INTPTR_FORMAT "  " UINTX_FORMAT_W(6) "  " SIZE_FORMAT_W(8) "  " SIZE_FORMAT_W(8) "  ",

       p2i(class_loader_klass), p2i(parent_klass), p2i(cls->_cld),

       cls->_classes_count,

       cls->_chunk_sz, cls->_block_sz);

   if (class_loader_klass != NULL) {

     _out->print("%s", class_loader_klass->external_name());

   } else {

     _out->print("<boot class loader>");

   }

   _out->cr();

   if (cls->_anon_classes_count > 0) {

     _out->print_cr(SPACE SPACE SPACE "                                    " UINTX_FORMAT_W(6) "  " SIZE_FORMAT_W(8) "  " SIZE_FORMAT_W(8) "   + unsafe anonymous classes",

         "", "", "",

         cls->_anon_classes_count,

         cls->_anon_chunk_sz, cls->_anon_block_sz);

   }

   return true;

 }

 void ClassLoaderStatsClosure::print() {

   _out->print_cr("ClassLoader" SPACE " Parent" SPACE "      CLD*" SPACE "       Classes   ChunkSz   BlockSz  Type", "", "", "");

   _stats->iterate(this);

   _out->print("Total = " UINTX_FORMAT_W(-6), _total_loaders);

   _out->print(SPACE SPACE SPACE "                      ", "", "", "");

   _out->print_cr(UINTX_FORMAT_W(6) "  " SIZE_FORMAT_W(8) "  " SIZE_FORMAT_W(8) "  ",

       _total_classes,

       _total_chunk_sz,

       _total_block_sz);

   _out->print_cr("ChunkSz: Total size of all allocated metaspace chunks");

   _out->print_cr("BlockSz: Total size of all allocated metaspace blocks (each chunk has several blocks)");

 }

 void ClassLoaderStatsClosure::addEmptyParents(oop cl) {

   while (cl != NULL && java_lang_ClassLoader::loader_data(cl) == NULL) {

     // This classloader has not loaded any classes

     ClassLoaderStats** cls_ptr = _stats->get(cl);

     if (cls_ptr == NULL) {

       // It does not exist in our table - add it

       ClassLoaderStats* cls = new ClassLoaderStats();

       cls->_class_loader = cl;

       cls->_parent = java_lang_ClassLoader::parent(cl);

       _stats->put(cl, cls);

       _total_loaders++;

     }

     cl = java_lang_ClassLoader::parent(cl);

   }

 }

 void ClassLoaderStatsVMOperation::doit() {

   ClassLoaderStatsClosure clsc (_out);

   ClassLoaderDataGraph::cld_do(&clsc);

   clsc.print();

 }

 void ClassLoaderStatsDCmd::execute(DCmdSource source, TRAPS) {

   ClassLoaderStatsVMOperation op(output());

   VMThread::execute(&op);

 }