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