1 /*
 2  * Copyright (c) 2019, 2025, 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_DYNAMICARCHIVE_HPP
26 #define SHARE_CDS_DYNAMICARCHIVE_HPP
27 
28 #include "cds/filemap.hpp"
29 #include "classfile/compactHashtable.hpp"
30 #include "memory/allStatic.hpp"
31 #include "memory/memRegion.hpp"
32 #include "oops/array.hpp"
33 #include "oops/oop.hpp"
34 #include "utilities/exceptions.hpp"
35 #include "utilities/growableArray.hpp"
36 #include "utilities/macros.hpp"
37 
38 #if INCLUDE_CDS
39 
40 class DynamicArchiveHeader : public FileMapHeader {
41   friend class CDSConstants;
42 private:
43   int _base_header_crc;
44   int _base_region_crc[MetaspaceShared::n_regions];
45 
46 public:
47   int base_header_crc() const { return _base_header_crc; }
48   int base_region_crc(int i) const {
49     assert(is_valid_region(i), "must be");
50     return _base_region_crc[i];
51   }
52 
53   void set_base_header_crc(int c) { _base_header_crc = c; }
54   void set_base_region_crc(int i, int c) {
55     assert(is_valid_region(i), "must be");
56     _base_region_crc[i] = c;
57   }
58   void print(outputStream* st);
59 };
60 
61 class DynamicArchive : AllStatic {
62 private:
63   static GrowableArray<ObjArrayKlass*>* _array_klasses;
64   static Array<ObjArrayKlass*>* _dynamic_archive_array_klasses;
65 public:
66   static void check_for_dynamic_dump();
67   static void dump_for_jcmd(const char* archive_name, TRAPS);
68   static void dump_at_exit(JavaThread* current, const char* archive_name);
69   static void dump_impl(bool jcmd_request, const char* archive_name, TRAPS);
70   static bool is_mapped() { return FileMapInfo::dynamic_info() != nullptr; }
71   static bool validate(FileMapInfo* dynamic_info);
72   static void dump_array_klasses();
73   static void setup_array_klasses();
74   static void append_array_klass(ObjArrayKlass* oak);
75   static void serialize_array_klasses(SerializeClosure* soc);
76   static void make_array_klasses_shareable();
77   static void post_dump();
78   static int  num_array_klasses();
79 };
80 #endif // INCLUDE_CDS
81 #endif // SHARE_CDS_DYNAMICARCHIVE_HPP