1 /*
2 * Copyright (c) 2014, 2024, 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_CLASSFILE_CLASSLOADEREXT_HPP
26 #define SHARE_CLASSFILE_CLASSLOADEREXT_HPP
27
28 #include "classfile/classLoader.hpp"
29 #include "classfile/moduleEntry.hpp"
30 #include "utilities/macros.hpp"
31
32 class ClassListParser;
33
34 class ClassLoaderExt: public ClassLoader { // AllStatic
35 public:
36 #if INCLUDE_CDS
37 private:
38 enum SomeConstants {
39 max_classpath_index = 0x7fff
40 };
41
42 static char* get_class_path_attr(const char* jar_path, char* manifest, jint manifest_size);
43 static void setup_app_search_path(JavaThread* current); // Only when -Xshare:dump
44 static void process_module_table(JavaThread* current, ModuleEntryTable* met);
45 // index of first app JAR in shared classpath entry table
46 static jshort _app_class_paths_start_index;
47 // index of first modular JAR in shared modulepath entry table
48 static jshort _app_module_paths_start_index;
49 // the largest path index being used during CDS dump time
50 static jshort _max_used_path_index;
51 // number of module paths
52 static int _num_module_paths;
53
54 static bool _has_app_classes;
55 static bool _has_platform_classes;
56 static bool _has_non_jar_in_classpath;
57
58 static char* read_manifest(JavaThread* current, ClassPathEntry* entry, jint *manifest_size, bool clean_text);
59 static bool has_jar_suffix(const char* filename);
60
61 // All classes whose path_index is within
62 // [_app_class_exclusion_start_path_index ... _app_module_paths_start_index)
63 // are excluded from the archive. See -XX:CacheOnlyClassesIn.
64 static int _app_class_exclusion_start_path_index;
65
66 static ClassPathEntry* get_class_path_entry(s2 classpath_index);
67 static void check_invalid_classpath_index(s2 classpath_index, InstanceKlass* ik);
68 public:
69 static void process_jar_manifest(JavaThread* current, ClassPathEntry* entry);
70
71 // Called by JVMTI code to add boot classpath
72 static void append_boot_classpath(ClassPathEntry* new_entry);
73
74 static void setup_search_paths(JavaThread* current);
75 static void setup_module_paths(JavaThread* current);
76 static void extract_jar_files_from_path(const char* path, GrowableArray<const char*>* module_paths);
77 static int compare_module_names(const char** p1, const char** p2);
78
79 static char* read_manifest(JavaThread* current, ClassPathEntry* entry, jint *manifest_size) {
80 // Remove all the new-line continuations (which wrap long lines at 72 characters, see
81 // http://docs.oracle.com/javase/6/docs/technotes/guides/jar/jar.html#JAR%20Manifest), so
82 // that the manifest is easier to parse.
83 return read_manifest(current, entry, manifest_size, true);
84 }
85 static char* read_raw_manifest(JavaThread* current, ClassPathEntry* entry, jint *manifest_size) {
86 // Do not remove new-line continuations, so we can easily pass it as an argument to
87 // java.util.jar.Manifest.getManifest() at run-time.
88 return read_manifest(current, entry, manifest_size, false);
89 }
90
91 static jshort app_class_paths_start_index() { return _app_class_paths_start_index; }
92
93 static jshort app_module_paths_start_index() { return _app_module_paths_start_index; }
94
95 static jshort max_used_path_index() { return _max_used_path_index; }
96
97 static int num_module_paths() { return _num_module_paths; }
98
99 static void set_max_used_path_index(jshort used_index) {
100 _max_used_path_index = used_index;
101 }
102
103 static void init_paths_start_index(jshort app_start) {
104 _app_class_paths_start_index = app_start;
105 }
106
107 static void init_app_module_paths_start_index(jshort module_start) {
108 _app_module_paths_start_index = module_start;
109 }
110
111 static void init_num_module_paths(int num_module_paths) {
112 _num_module_paths = num_module_paths;
113 }
114
115 static bool is_boot_classpath(int classpath_index) {
116 return classpath_index < _app_class_paths_start_index;
117 }
118
119 static bool has_platform_or_app_classes() {
120 return _has_app_classes || _has_platform_classes;
121 }
122
123 static bool has_non_jar_in_classpath() {
124 return _has_non_jar_in_classpath;
125 }
126
127 static void record_result(const s2 classpath_index, InstanceKlass* result, bool redefined);
128 static void set_has_app_classes() {
129 _has_app_classes = true;
130 }
131 static void set_has_platform_classes() {
132 _has_platform_classes = true;
133 }
134 static void set_has_non_jar_in_classpath() {
135 _has_non_jar_in_classpath = true;
136 }
137
138 // -XX:CacheOnlyClassesIn=
139 static bool should_be_excluded(InstanceKlass* k);
140 static void set_app_class_exclusion_start_path_index(int i) {
141 _app_class_exclusion_start_path_index = i;
142 }
143
144 #endif // INCLUDE_CDS
145 };
146
147 #endif // SHARE_CLASSFILE_CLASSLOADEREXT_HPP