1 /*
 2  * Copyright (c) 2021, 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
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23  */
24 
25 #ifndef SHARE_CDS_DUMPTIMECLASSINFO_INLINE_HPP
26 #define SHARE_CDS_DUMPTIMECLASSINFO_INLINE_HPP
27 
28 #include "cds/dumpTimeClassInfo.hpp"
29 
30 #include "cds/cdsConfig.hpp"
31 #include "classfile/classLoaderData.inline.hpp"
32 #include "classfile/systemDictionaryShared.hpp"
33 #include "oops/instanceKlass.hpp"
34 #include "oops/klass.inline.hpp"
35 #include "runtime/safepoint.hpp"
36 
37 #if INCLUDE_CDS
38 
39 // For safety, only iterate over a class if its loader is alive.
40 // This function must be called only inside a safepoint, where the value of
41 // k->is_loader_alive() will not change.
42 template<typename Function>
43 void DumpTimeSharedClassTable::iterate_all_live_classes(Function function) const {
44   auto wrapper = [&] (InstanceKlass* k, DumpTimeClassInfo& info) {
45     assert(SafepointSynchronize::is_at_safepoint(), "invariant");
46     assert_lock_strong(DumpTimeTable_lock);
47     if (CDSConfig::is_dumping_final_static_archive() && !k->is_loaded()) {
48       assert(k->defined_by_other_loaders(), "must be");
49       function(k, info);
50     } else if (k->is_loader_alive()) {
51       function(k, info);
52       assert(k->is_loader_alive(), "must not change");
53     } else {
54       if (!SystemDictionaryShared::is_excluded_class(k)) {
55         SystemDictionaryShared::log_exclusion(k, "Class loader not alive");
56         SystemDictionaryShared::set_excluded_locked(k);
57       }
58     }
59   };
60   DumpTimeSharedClassTableBaseType::iterate_all(wrapper);
61 }
62 
63 
64 template<class ITER>
65 void DumpTimeSharedClassTable::iterate_all_live_classes(ITER* iter) const {
66   auto function = [&] (InstanceKlass* k, DumpTimeClassInfo& v) {
67     iter->do_entry(k, v);
68   };
69   iterate_all_live_classes(function);
70 }
71 
72 #endif // INCLUDE_CDS
73 
74 #endif // SHARE_CDS_DUMPTIMECLASSINFO_INLINE_HPP