/*

 * Copyright (c) 2018, 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/classLoaderData.inline.hpp"

#include "classfile/javaClasses.hpp"

#include "memory/metaspace/printCLDMetaspaceInfoClosure.hpp"

#include "memory/metaspace/printMetaspaceInfoKlassClosure.hpp"

#include "memory/resourceArea.hpp"

#include "runtime/safepoint.hpp"

#include "utilities/globalDefinitions.hpp"

#include "utilities/ostream.hpp"

namespace metaspace {

PrintCLDMetaspaceInfoClosure::PrintCLDMetaspaceInfoClosure(outputStream* out, size_t scale, bool do_print,

    bool do_print_classes, bool break_down_by_chunktype)

: _out(out), _scale(scale), _do_print(do_print), _do_print_classes(do_print_classes)

, _break_down_by_chunktype(break_down_by_chunktype)

{

  memset(_num_loaders_by_spacetype, 0, sizeof(_num_loaders_by_spacetype));

}

static const char* classes_plural(uintx num) {

  return num == 1 ? "" : "es";

}

void PrintCLDMetaspaceInfoClosure::do_cld(ClassLoaderData* cld) {

  assert(SafepointSynchronize::is_at_safepoint(), "Must be at a safepoint");

  if (cld->is_unloading()) {

    _num_loaders_unloading ++;

    return;

  }

  ClassLoaderMetaspace* msp = cld->metaspace_or_null();

  if (msp == NULL) {

    _num_loaders_without_metaspace ++;

    return;

  }

  // Collect statistics for this class loader metaspace

  ClassLoaderMetaspaceStatistics this_cld_stat;

  msp->add_to_statistics(&this_cld_stat);

  // And add it to the running totals

  _stats_total.add(this_cld_stat);

  _num_loaders ++;

  _stats_by_spacetype[msp->space_type()].add(this_cld_stat);

  _num_loaders_by_spacetype[msp->space_type()] ++;

  // Optionally, print.

  if (_do_print) {

    _out->print(UINTX_FORMAT_W(4) ": ", _num_loaders);

    // Print "CLD for [<loader name>,] instance of <loader class name>"

    // or    "CLD for <anonymous class>, loaded by [<loader name>,] instance of <loader class name>"

    ResourceMark rm;

    const char* name = NULL;

    const char* class_name = NULL;

    // Note: this should also work if unloading:

    Klass* k = cld->class_loader_klass();

    if (k != NULL) {

      class_name = k->external_name();

      Symbol* s = cld->name();

      if (s != NULL) {

        name = s->as_C_string();

      }

    } else {

      name = "<bootstrap>";

    }

    // Print

    _out->print("CLD " PTR_FORMAT, p2i(cld));

    if (cld->is_unloading()) {

      _out->print(" (unloading)");

    }

    _out->print(":");

    if (cld->is_anonymous()) {

      _out->print(" <anonymous class>, loaded by");

    }

    if (name != NULL) {

      _out->print(" \"%s\"", name);

    }

    if (class_name != NULL) {

      _out->print(" instance of %s", class_name);

    }

    if (_do_print_classes) {

      streamIndentor sti(_out, 6);

      _out->cr_indent();

      _out->print("Loaded classes: ");

      PrintMetaspaceInfoKlassClosure pkic(_out, true);

      cld->classes_do(&pkic);

      _out->cr_indent();

      _out->print("-total-: ");

      _out->print(UINTX_FORMAT " class%s", pkic._num_classes, classes_plural(pkic._num_classes));

      if (pkic._num_instance_classes > 0 || pkic._num_array_classes > 0) {

        _out->print(" (");

        if (pkic._num_instance_classes > 0) {

          _out->print(UINTX_FORMAT " instance class%s", pkic._num_instance_classes,

              classes_plural(pkic._num_instance_classes));

        }

        if (pkic._num_array_classes > 0) {

          if (pkic._num_instance_classes > 0) {

            _out->print(", ");

          }

          _out->print(UINTX_FORMAT " array class%s", pkic._num_array_classes,

              classes_plural(pkic._num_array_classes));

        }

        _out->print(").");

      }

    }

    _out->cr();

    _out->cr();

    // Print statistics

    this_cld_stat.print_on(_out, _scale, _break_down_by_chunktype);

    _out->cr();

  }

}

} // namespace metaspace