1 /*
2 * Copyright (c) 2020, 2023, 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_CLASSLISTWRITER_HPP
26 #define SHARE_CDS_CLASSLISTWRITER_HPP
27
28 #include "runtime/javaThread.hpp"
29 #include "runtime/mutexLocker.hpp"
30 #include "utilities/ostream.hpp"
31
32 class ClassFileStream;
33
34 class ClassListWriter {
35 #if INCLUDE_CDS
36 class IDTable;
37 class WriteResolveConstantsCLDClosure;
38
39 static fileStream* _classlist_file;
40 static IDTable* _id_table;
41 static int _total_ids;
42 MutexLocker _locker;
43
44 static int get_id(const InstanceKlass* k);
45 static bool has_id(const InstanceKlass* k);
46 static void assert_locked() { assert_lock_strong(ClassListFile_lock); }
47 static void write_resolved_constants_for(InstanceKlass* klass);
48 static void write_array_info_for(InstanceKlass* klass);
49 static void write_reflection_data_for(InstanceKlass* klass);
50 static void write_loader_negative_lookup_cache_for(oop loader, const char* loader_type);
51 public:
52 ClassListWriter() : _locker(Thread::current(), ClassListFile_lock, Mutex::_no_safepoint_check_flag) {}
53
54 outputStream* stream() {
55 return _classlist_file;
56 }
57
58 void handle_class_unloading(const InstanceKlass* klass);
59
60 static bool is_enabled() {
61 return _classlist_file != nullptr && _classlist_file->is_open();
62 }
63
64 #else
65 public:
66 static bool is_enabled() {
67 return false;
68 }
69 #endif // INCLUDE_CDS
70
71
72 static void init() NOT_CDS_RETURN;
73 static void write(const InstanceKlass* k, const ClassFileStream* cfs) NOT_CDS_RETURN;
74 static void write_to_stream(const InstanceKlass* k, outputStream* stream, const ClassFileStream* cfs = nullptr) NOT_CDS_RETURN;
75 static void write_resolved_constants() NOT_CDS_RETURN;
76 static void write_reflection_data() NOT_CDS_RETURN;
77 static void write_loader_negative_lookup_cache() NOT_CDS_RETURN;
78 static void delete_classlist() NOT_CDS_RETURN;
79 };
80
81 #endif // SHARE_CDS_CLASSLISTWRITER_HPP