1 /*
2 * Copyright (c) 2021, 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 #include "precompiled.hpp"
26 #include "cds/archiveBuilder.hpp"
27 #include "cds/dumpTimeClassInfo.inline.hpp"
28 #include "cds/runTimeClassInfo.hpp"
29 #include "classfile/classLoader.hpp"
30 #include "classfile/classLoaderData.inline.hpp"
31 #include "classfile/systemDictionaryShared.hpp"
32 #include "memory/resourceArea.hpp"
33
34 DumpTimeClassInfo::~DumpTimeClassInfo() {
35 if (_verifier_constraints != nullptr) {
36 assert(_verifier_constraint_flags != nullptr, "must be");
37 delete _verifier_constraints;
38 delete _verifier_constraint_flags;
39 }
40 if (_loader_constraints != nullptr) {
41 delete _loader_constraints;
42 }
43 }
44
45 size_t DumpTimeClassInfo::runtime_info_bytesize() const {
46 return RunTimeClassInfo::byte_size(_klass, num_verifier_constraints(),
47 num_loader_constraints(),
48 num_enum_klass_static_fields());
49 }
50
51 void DumpTimeClassInfo::add_verification_constraint(InstanceKlass* k, Symbol* name,
52 Symbol* from_name, bool from_field_is_protected, bool from_is_array, bool from_is_object) {
53 if (_verifier_constraints == nullptr) {
54 _verifier_constraints = new (mtClass) GrowableArray<DTVerifierConstraint>(4, mtClass);
55 }
56 if (_verifier_constraint_flags == nullptr) {
57 _verifier_constraint_flags = new (mtClass) GrowableArray<char>(4, mtClass);
58 }
59 GrowableArray<DTVerifierConstraint>* vc_array = _verifier_constraints;
60 for (int i = 0; i < vc_array->length(); i++) {
61 if (vc_array->at(i).equals(name, from_name)) {
62 return;
63 }
64 }
65 DTVerifierConstraint cons(name, from_name);
66 vc_array->append(cons);
67
68 GrowableArray<char>* vcflags_array = _verifier_constraint_flags;
69 char c = 0;
70 c |= from_field_is_protected ? SystemDictionaryShared::FROM_FIELD_IS_PROTECTED : 0;
71 c |= from_is_array ? SystemDictionaryShared::FROM_IS_ARRAY : 0;
72 c |= from_is_object ? SystemDictionaryShared::FROM_IS_OBJECT : 0;
73 vcflags_array->append(c);
74
75 if (log_is_enabled(Trace, cds, verification)) {
76 ResourceMark rm;
77 log_trace(cds, verification)("add_verification_constraint: %s: %s must be subclass of %s [0x%x] array len %d flags len %d",
78 k->external_name(), from_name->as_klass_external_name(),
79 name->as_klass_external_name(), c, vc_array->length(), vcflags_array->length());
80 }
81 }
82
83 static char get_loader_type_by(oop loader) {
84 assert(SystemDictionary::is_builtin_class_loader(loader), "Must be built-in loader");
85 if (SystemDictionary::is_boot_class_loader(loader)) {
86 return (char)ClassLoader::BOOT_LOADER;
87 } else if (SystemDictionary::is_platform_class_loader(loader)) {
88 return (char)ClassLoader::PLATFORM_LOADER;
89 } else {
90 assert(SystemDictionary::is_system_class_loader(loader), "Class loader mismatch");
91 return (char)ClassLoader::APP_LOADER;
92 }
93 }
94
95 void DumpTimeClassInfo::record_linking_constraint(Symbol* name, Handle loader1, Handle loader2) {
96 assert(loader1 != loader2, "sanity");
97 LogTarget(Info, class, loader, constraints) log;
98 if (_loader_constraints == nullptr) {
99 _loader_constraints = new (mtClass) GrowableArray<DTLoaderConstraint>(4, mtClass);
100 }
101 char lt1 = get_loader_type_by(loader1());
102 char lt2 = get_loader_type_by(loader2());
103 DTLoaderConstraint lc(name, lt1, lt2);
104 for (int i = 0; i < _loader_constraints->length(); i++) {
105 if (lc.equals(_loader_constraints->at(i))) {
106 if (log.is_enabled()) {
107 ResourceMark rm;
108 // Use loader[0]/loader[1] to be consistent with the logs in loaderConstraints.cpp
109 log.print("[CDS record loader constraint for class: %s constraint_name: %s loader[0]: %s loader[1]: %s already added]",
110 _klass->external_name(), name->as_C_string(),
111 ClassLoaderData::class_loader_data(loader1())->loader_name_and_id(),
112 ClassLoaderData::class_loader_data(loader2())->loader_name_and_id());
113 }
114 return;
115 }
116 }
117 _loader_constraints->append(lc);
118 if (log.is_enabled()) {
119 ResourceMark rm;
120 // Use loader[0]/loader[1] to be consistent with the logs in loaderConstraints.cpp
121 log.print("[CDS record loader constraint for class: %s constraint_name: %s loader[0]: %s loader[1]: %s total %d]",
122 _klass->external_name(), name->as_C_string(),
123 ClassLoaderData::class_loader_data(loader1())->loader_name_and_id(),
124 ClassLoaderData::class_loader_data(loader2())->loader_name_and_id(),
125 _loader_constraints->length());
126 }
127 }
128
129 void DumpTimeClassInfo::add_enum_klass_static_field(int archived_heap_root_index) {
130 if (_enum_klass_static_fields == nullptr) {
131 _enum_klass_static_fields = new (mtClass) GrowableArray<int>(20, mtClass);
132 }
133 _enum_klass_static_fields->append(archived_heap_root_index);
134 }
135
136 int DumpTimeClassInfo::enum_klass_static_field(int which_field) {
137 assert(_enum_klass_static_fields != nullptr, "must be");
138 return _enum_klass_static_fields->at(which_field);
139 }
140
141 bool DumpTimeClassInfo::is_builtin() {
142 return SystemDictionaryShared::is_builtin(_klass);
143 }
144
145 DumpTimeClassInfo* DumpTimeSharedClassTable::allocate_info(InstanceKlass* k) {
146 assert(!k->is_shared(), "Do not call with shared classes");
147 bool created;
148 DumpTimeClassInfo* p = put_if_absent(k, &created);
149 assert(created, "must not exist in table");
150 p->_klass = k;
151 return p;
152 }
153
154 DumpTimeClassInfo* DumpTimeSharedClassTable::get_info(InstanceKlass* k) {
155 assert(!k->is_shared(), "Do not call with shared classes");
156 DumpTimeClassInfo* p = get(k);
157 assert(p != nullptr, "we must not see any non-shared InstanceKlass* that's "
158 "not stored with SystemDictionaryShared::init_dumptime_info");
159 assert(p->_klass == k, "Sanity");
160 return p;
161 }
162
163 class CountClassByCategory : StackObj {
164 DumpTimeSharedClassTable* _table;
165 public:
166 CountClassByCategory(DumpTimeSharedClassTable* table) : _table(table) {}
167 void do_entry(InstanceKlass* k, DumpTimeClassInfo& info) {
168 if (!info.is_excluded()) {
169 if (info.is_builtin()) {
170 _table->inc_builtin_count();
171 } else {
172 _table->inc_unregistered_count();
173 }
174 }
175 }
176 };
177
178 void DumpTimeSharedClassTable::update_counts() {
179 _builtin_count = 0;
180 _unregistered_count = 0;
181 CountClassByCategory counter(this);
182 iterate_all_live_classes(&counter);
183 }