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 "memory/metaspace.hpp"
  26 #include "services/diagnosticCommand.hpp"
  27 #include "services/nmtCommon.hpp"
  28 
  29 
  30 MetaspaceDCmd::MetaspaceDCmd(outputStream* output, bool heap)
  31   : DCmdWithParser(output, heap)
  32   , _show_loaders("loaders", "Shows usage by class loader.", "BOOLEAN", false, "false")
  33   , _by_chunktype("by_chunktype", "Break down numbers by chunk type.", "BOOLEAN", false, "false")
  34   , _by_spacetype("by_spacetype", "Break down numbers by loader type.", "BOOLEAN", false, "false")
  35   , _show_vslist("vslist", "Shows details about the virtual space list", "BOOLEAN", false, "false")
  36   , _show_vsmap("vsmap", "Shows a map of the virtual spaces", "BOOLEAN", false, "false")
  37   , _show_chunk_freelist("chunk-freelist", "Shows details about the free chunk list", "BOOLEAN", false, "false")
  38   , _scale("scale", "Memory usage in which to scale. Valid values are: 1, KB, MB or GB (fixed scale) "
  39            "or \"dynamic\" for dynamically choosen scale.",
  40      "STRING", false, "dynamic")
  41 {
  42   _dcmdparser.add_dcmd_option(&_show_loaders);
  43   _dcmdparser.add_dcmd_option(&_by_chunktype);
  44   _dcmdparser.add_dcmd_option(&_by_spacetype);
  45   _dcmdparser.add_dcmd_option(&_show_vslist);
  46   _dcmdparser.add_dcmd_option(&_show_vsmap);
  47   _dcmdparser.add_dcmd_option(&_show_chunk_freelist);
  48   _dcmdparser.add_dcmd_option(&_scale);
  49 }
  50 
  51 void MetaspaceDCmd::execute(DCmdSource source, TRAPS) {
  52   // Parse scale value.
  53   const char* scale_value = _scale.value();
  54   size_t scale = 0;
  55   if (scale_value != NULL) {
  56     if (strcasecmp("dynamic", scale_value) == 0) {
  57       scale = 0;
  58     } else {
  59       scale = NMTUtil::scale_from_name(scale_value);
  60       if (scale == 0) {
  61         output()->print_cr("Invalid scale: \"%s\". Will use dynamic scaling.", scale_value);
  62       }
  63     }
  64   }
  65   // Parse flags.
  66   int flags = 0;
  67   if (_show_loaders.value())         flags |= MetaspaceUtils::rf_show_loaders;
  68   if (_by_chunktype.value())         flags |= MetaspaceUtils::rf_break_down_by_chunktype;
  69   if (_by_spacetype.value())         flags |= MetaspaceUtils::rf_break_down_by_spacetype;
  70   if (_show_vslist.value())          flags |= MetaspaceUtils::rf_show_vslist;
  71   if (_show_vsmap.value())           flags |= MetaspaceUtils::rf_show_vsmap;
  72   if (_show_chunk_freelist.value())  flags |= MetaspaceUtils::rf_show_chunk_freelist;
  73   VM_PrintMetadata op(output(), scale, flags);
  74   VMThread::execute(&op);
  75 }
  76