1 /*
2 * Copyright (c) 2020, 2026, 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
25 #ifndef SHARE_CDS_DUMPALLOCSTATS_HPP
26 #define SHARE_CDS_DUMPALLOCSTATS_HPP
27
28 #include "classfile/compactHashtable.hpp"
29 #include "memory/allocation.hpp"
30 #include "memory/metaspaceClosureType.hpp"
31
32 // This is for dumping detailed statistics for the allocations
33 // in the shared spaces.
34 class DumpAllocStats : public StackObj {
35 public:
36
37 #define DUMPED_OBJ_TYPES_DO(f) \
38 METASPACE_CLOSURE_TYPES_DO(f) \
39 f(SymbolHashentry) \
40 f(SymbolBucket) \
41 f(StringHashentry) \
42 f(StringBucket) \
43 f(CppVTables) \
44 f(Other)
45
46 #define DUMPED_TYPE_DECLARE(name) name ## Type,
47 #define DUMPED_TYPE_NAME_CASE(name) case name ## Type: return #name;
48
49 enum Type {
50 // Types are MetaspaceObj::ClassType, MetaspaceObj::SymbolType, etc
51 DUMPED_OBJ_TYPES_DO(DUMPED_TYPE_DECLARE)
52 _number_of_types
53 };
54
55 static const char* type_name(Type type) {
56 switch(type) {
57 DUMPED_OBJ_TYPES_DO(DUMPED_TYPE_NAME_CASE)
58 default:
59 ShouldNotReachHere();
60 return nullptr;
61 }
62 }
63
64 CompactHashtableStats _symbol_stats;
65 CompactHashtableStats _string_stats;
66
67 int _counts[2][_number_of_types];
68 int _bytes [2][_number_of_types];
69
70 int _num_field_cp_entries;
71 int _num_field_cp_entries_archived;
72 int _num_field_cp_entries_reverted;
73 int _num_indy_cp_entries;
74 int _num_indy_cp_entries_archived;
75 int _num_indy_cp_entries_reverted;
76 int _num_klass_cp_entries;
77 int _num_klass_cp_entries_archived;
78 int _num_klass_cp_entries_reverted;
79 int _num_method_cp_entries;
80 int _num_method_cp_entries_archived;
81 int _num_method_cp_entries_reverted;
82
83 public:
84 enum { RO = 0, RW = 1 };
85
86 DumpAllocStats() {
87 memset(_counts, 0, sizeof(_counts));
88 memset(_bytes, 0, sizeof(_bytes));
89 _num_field_cp_entries = 0;
90 _num_field_cp_entries_archived = 0;
91 _num_field_cp_entries_reverted = 0;
92 _num_indy_cp_entries = 0;
93 _num_indy_cp_entries_archived = 0;
94 _num_indy_cp_entries_reverted = 0;
95 _num_klass_cp_entries = 0;
96 _num_klass_cp_entries_archived = 0;
97 _num_klass_cp_entries_reverted = 0;
98 _num_method_cp_entries = 0;
99 _num_method_cp_entries_archived = 0;
100 _num_method_cp_entries_reverted = 0;
101 };
102
103 CompactHashtableStats* symbol_stats() { return &_symbol_stats; }
104 CompactHashtableStats* string_stats() { return &_string_stats; }
105
106 void record(MetaspaceClosureType type, int byte_size, bool read_only) {
107 int t = (int)type;
108 assert(t >= 0 && t < (int)MetaspaceClosureType::_number_of_types, "sanity");
109 int which = (read_only) ? RO : RW;
110 _counts[which][t] ++;
111 _bytes [which][t] += byte_size;
112 }
113
114 void record_other_type(int byte_size, bool read_only) {
115 int which = (read_only) ? RO : RW;
116 _bytes [which][OtherType] += byte_size;
117 }
118
119 void record_cpp_vtables(int byte_size) {
120 _bytes[RW][CppVTablesType] += byte_size;
121 }
122
123 void record_field_cp_entry(bool archived, bool reverted) {
124 _num_field_cp_entries ++;
125 _num_field_cp_entries_archived += archived ? 1 : 0;
126 _num_field_cp_entries_reverted += reverted ? 1 : 0;
127 }
128
129 void record_indy_cp_entry(bool archived, bool reverted) {
130 _num_indy_cp_entries ++;
131 _num_indy_cp_entries_archived += archived ? 1 : 0;
132 _num_indy_cp_entries_reverted += reverted ? 1 : 0;
133 }
134
135 void record_klass_cp_entry(bool archived, bool reverted) {
136 _num_klass_cp_entries ++;
137 _num_klass_cp_entries_archived += archived ? 1 : 0;
138 _num_klass_cp_entries_reverted += reverted ? 1 : 0;
139 }
140
141 void record_method_cp_entry(bool archived, bool reverted) {
142 _num_method_cp_entries ++;
143 _num_method_cp_entries_archived += archived ? 1 : 0;
144 _num_method_cp_entries_reverted += reverted ? 1 : 0;
145 }
146
147 void print_stats(int ro_all, int rw_all);
148
149 DEBUG_ONLY(void verify(int expected_byte_size, bool read_only) const);
150
151 };
152
153 #endif // SHARE_CDS_DUMPALLOCSTATS_HPP