1 /*
   2  * Copyright (c) 2018, 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 #include "precompiled.hpp"
  25 #include "classfile/classLoaderData.hpp"
  26 #include "memory/metaspace/printCLDMetaspaceInfoClosure.hpp"
  27 #include "memory/resourceArea.hpp"
  28 #include "runtime/safepoint.hpp"
  29 #include "utilities/globalDefinitions.hpp"
  30 #include "utilities/ostream.hpp"
  31 
  32 
  33 namespace metaspace {
  34 
  35 PrintCLDMetaspaceInfoClosure::PrintCLDMetaspaceInfoClosure(outputStream* out, size_t scale, bool do_print, bool break_down_by_chunktype)
  36 : _out(out), _scale(scale), _do_print(do_print), _break_down_by_chunktype(break_down_by_chunktype)
  37 , _num_loaders(0)
  38 {
  39   memset(_num_loaders_by_spacetype, 0, sizeof(_num_loaders_by_spacetype));
  40 }
  41 
  42 void PrintCLDMetaspaceInfoClosure::do_cld(ClassLoaderData* cld) {
  43 
  44   assert(SafepointSynchronize::is_at_safepoint(), "Must be at a safepoint");
  45 
  46   ClassLoaderMetaspace* msp = cld->metaspace_or_null();
  47   if (msp == NULL) {
  48     return;
  49   }
  50 
  51   // Collect statistics for this class loader metaspace
  52   ClassLoaderMetaspaceStatistics this_cld_stat;
  53   msp->add_to_statistics(&this_cld_stat);
  54 
  55   // And add it to the running totals
  56   _stats_total.add(this_cld_stat);
  57   _num_loaders ++;
  58   _stats_by_spacetype[msp->space_type()].add(this_cld_stat);
  59   _num_loaders_by_spacetype[msp->space_type()] ++;
  60 
  61   // Optionally, print.
  62   if (_do_print) {
  63 
  64     _out->print(UINTX_FORMAT_W(4) ": ", _num_loaders);
  65 
  66     if (cld->is_anonymous()) {
  67       _out->print("ClassLoaderData " PTR_FORMAT " for anonymous class", p2i(cld));
  68     } else {
  69       ResourceMark rm;
  70       _out->print("ClassLoaderData " PTR_FORMAT " for %s", p2i(cld), cld->loader_name());
  71     }
  72 
  73     if (cld->is_unloading()) {
  74       _out->print(" (unloading)");
  75     }
  76 
  77     this_cld_stat.print_on(_out, _scale, _break_down_by_chunktype);
  78     _out->cr();
  79 
  80   }
  81 
  82 }
  83 
  84 } // namespace metaspace
  85