1 /*
2 * Copyright (c) 2018, Oracle and/or its affiliates. All rights reserved.
3 * Copyright (c) 2018, SAP and/or its affiliates.
4 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
5 *
6 * This code is free software; you can redistribute it and/or modify it
7 * under the terms of the GNU General Public License version 2 only, as
8 * published by the Free Software Foundation.
9 *
10 * This code is distributed in the hope that it will be useful, but WITHOUT
11 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
12 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
13 * version 2 for more details (a copy is included in the LICENSE file that
14 * accompanied this code).
15 *
16 * You should have received a copy of the GNU General Public License version
17 * 2 along with this work; if not, write to the Free Software Foundation,
18 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
19 *
20 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
21 * or visit www.oracle.com if you need additional information or have any
22 * questions.
23 *
24 */
25 #include "precompiled.hpp"
26 #include "memory/metaspace.hpp"
27 #include "memory/metaspace/metaspaceDCmd.hpp"
28 #include "memory/resourceArea.hpp"
29 #include "services/diagnosticCommand.hpp"
30 #include "services/nmtCommon.hpp"
31
32 namespace metaspace {
33
MetaspaceDCmd(outputStream * output,bool heap)34 MetaspaceDCmd::MetaspaceDCmd(outputStream* output, bool heap)
35 : DCmdWithParser(output, heap)
36 , _basic("basic", "Prints a basic summary (does not need a safepoint).", "BOOLEAN", false, "false")
37 , _show_loaders("show-loaders", "Shows usage by class loader.", "BOOLEAN", false, "false")
38 , _by_spacetype("by-spacetype", "Break down numbers by loader type.", "BOOLEAN", false, "false")
39 , _by_chunktype("by-chunktype", "Break down numbers by chunk type.", "BOOLEAN", false, "false")
40 , _show_vslist("vslist", "Shows details about the underlying virtual space.", "BOOLEAN", false, "false")
41 , _show_vsmap("vsmap", "Shows chunk composition of the underlying virtual spaces", "BOOLEAN", false, "false")
42 , _scale("scale", "Memory usage in which to scale. Valid values are: 1, KB, MB or GB (fixed scale) "
43 "or \"dynamic\" for a dynamically choosen scale.",
44 "STRING", false, "dynamic")
45 , _show_classes("show-classes", "If show-loaders is set, shows loaded classes for each loader.", "BOOLEAN", false, "false")
46 {
47 _dcmdparser.add_dcmd_option(&_basic);
48 _dcmdparser.add_dcmd_option(&_show_loaders);
49 _dcmdparser.add_dcmd_option(&_show_classes);
50 _dcmdparser.add_dcmd_option(&_by_chunktype);
51 _dcmdparser.add_dcmd_option(&_by_spacetype);
52 _dcmdparser.add_dcmd_option(&_show_vslist);
53 _dcmdparser.add_dcmd_option(&_show_vsmap);
54 _dcmdparser.add_dcmd_option(&_scale);
55 }
56
num_arguments()57 int MetaspaceDCmd::num_arguments() {
58 ResourceMark rm;
59 MetaspaceDCmd* dcmd = new MetaspaceDCmd(NULL, false);
60 if (dcmd != NULL) {
61 DCmdMark mark(dcmd);
62 return dcmd->_dcmdparser.num_arguments();
63 } else {
64 return 0;
65 }
66 }
67
execute(DCmdSource source,TRAPS)68 void MetaspaceDCmd::execute(DCmdSource source, TRAPS) {
69 // Parse scale value.
70 const char* scale_value = _scale.value();
71 size_t scale = 0;
72 if (scale_value != NULL) {
73 if (strcasecmp("dynamic", scale_value) == 0) {
74 scale = 0;
75 } else {
76 scale = NMT_ONLY(NMTUtil::scale_from_name(scale_value)) NOT_NMT(0);
77 if (scale == 0) {
78 output()->print_cr("Invalid scale: \"%s\". Will use dynamic scaling.", scale_value);
79 }
80 }
81 }
82 if (_basic.value() == true) {
83 if (_show_loaders.value() || _by_chunktype.value() || _by_spacetype.value() ||
84 _show_vslist.value() || _show_vsmap.value()) {
85 // Basic mode. Just print essentials. Does not need to be at a safepoint.
86 output()->print_cr("In basic mode, additional arguments are ignored.");
87 }
88 MetaspaceUtils::print_basic_report(output(), scale);
89 } else {
90 // Full mode. Requires safepoint.
91 int flags = 0;
92 if (_show_loaders.value()) flags |= MetaspaceUtils::rf_show_loaders;
93 if (_show_classes.value()) flags |= MetaspaceUtils::rf_show_classes;
94 if (_by_chunktype.value()) flags |= MetaspaceUtils::rf_break_down_by_chunktype;
95 if (_by_spacetype.value()) flags |= MetaspaceUtils::rf_break_down_by_spacetype;
96 if (_show_vslist.value()) flags |= MetaspaceUtils::rf_show_vslist;
97 if (_show_vsmap.value()) flags |= MetaspaceUtils::rf_show_vsmap;
98 VM_PrintMetadata op(output(), scale, flags);
99 VMThread::execute(&op);
100 }
101 }
102
103 } // namespace metaspace
104
105