1 /*

     2  * Copyright (c) 2014, 2015, Oracle and/or its affiliates. All rights reserved.

     3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.

     4  *

     5  * This code is free software; you can redistribute it and/or modify it

     6  * under the terms of the GNU General Public License version 2 only, as

     7  * published by the Free Software Foundation.

     8  *

     9  * This code is distributed in the hope that it will be useful, but WITHOUT

    10  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or

    11  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License

    12  * version 2 for more details (a copy is included in the LICENSE file that

    13  * accompanied this code).

    14  *

    15  * You should have received a copy of the GNU General Public License version

    16  * 2 along with this work; if not, write to the Free Software Foundation,

    17  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.

    18  *

    19  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA

    20  * or visit www.oracle.com if you need additional information or have any

    21  * questions.

    22  *

    23  */

    24 

    25 #include "precompiled.hpp"

    26 #include "classfile/classLoaderStats.hpp"

    27 #include "oops/oop.inline.hpp"

    28 #include "utilities/globalDefinitions.hpp"

    29 

    30 

    31 class ClassStatsClosure : public KlassClosure {

    32 public:

    33   int _num_classes;

    34 

    35   ClassStatsClosure() :

    36     _num_classes(0) {

    37   }

    38 

    39   virtual void do_klass(Klass* k) {

    40     _num_classes++;

    41   }

    42 };

    43 

    44 

    45 void ClassLoaderStatsClosure::do_cld(ClassLoaderData* cld) {

    46   oop cl = cld->class_loader();

    47   ClassLoaderStats* cls;

    48 

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

    50   // for "real" classes and anonymous classes together

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

    52   if (cls_ptr == NULL) {

    53     cls = new ClassLoaderStats();

    54     _stats->put(cl, cls);

    55     _total_loaders++;

    56   } else {

    57     cls = *cls_ptr;

    58   }

    59 

    60   if (!cld->is_anonymous()) {

    61     cls->_cld = cld;

    62   }

    63 

    64   cls->_class_loader = cl;

    65   if (cl != NULL) {

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

    67     addEmptyParents(cls->_parent);

    68   }

    69 

    70   ClassStatsClosure csc;

    71   cld->classes_do(&csc);

    72   if(cld->is_anonymous()) {

    73     cls->_anon_classes_count += csc._num_classes;

    74   } else {

    75     cls->_classes_count = csc._num_classes;

    76   }

    77   _total_classes += csc._num_classes;

    78 

    79   Metaspace* ms = cld->metaspace_or_null();

    80   if (ms != NULL) {

    81     if(cld->is_anonymous()) {

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

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

    84     } else {

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

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

    87     }

    88     _total_chunk_sz += ms->allocated_chunks_bytes();

    89     _total_block_sz += ms->allocated_blocks_bytes();

    90   }

    91 }

    92 

    93 

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

    95 #ifdef _LP64

    96   #define SPACE "%8s"

    97 #else

    98   #define SPACE "%s"

    99 #endif

   100 

   101 

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

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

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

   105 

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

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

   108       cls->_classes_count,

   109       cls->_chunk_sz, cls->_block_sz);

   110   if (class_loader_klass != NULL) {

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

   112   } else {

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

   114   }

   115   _out->cr();

   116   if (cls->_anon_classes_count > 0) {

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

   118         "", "", "",

   119         cls->_anon_classes_count,

   120         cls->_anon_chunk_sz, cls->_anon_block_sz);

   121   }

   122   return true;

   123 }

   124 

   125 

   126 void ClassLoaderStatsClosure::print() {

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

   128   _stats->iterate(this);

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

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

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

   132       _total_classes,

   133       _total_chunk_sz,

   134       _total_block_sz);

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

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

   137 }

   138 

   139 

   140 void ClassLoaderStatsClosure::addEmptyParents(oop cl) {

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

   142     // This classloader has not loaded any classes

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

   144     if (cls_ptr == NULL) {

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

   146       ClassLoaderStats* cls = new ClassLoaderStats();

   147       cls->_class_loader = cl;

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

   149       _stats->put(cl, cls);

   150       _total_loaders++;

   151     }

   152 

   153     cl = java_lang_ClassLoader::parent(cl);

   154   }

   155 }

   156 

   157 

   158 void ClassLoaderStatsVMOperation::doit() {

   159   ClassLoaderStatsClosure clsc (_out);

   160   ClassLoaderDataGraph::cld_do(&clsc);

   161   clsc.print();

   162 }

   163 

   164 

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

   166   ClassLoaderStatsVMOperation op(output());

   167   VMThread::execute(&op);

   168 }