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 public:
62 static void process_jar_manifest(JavaThread* current, ClassPathEntry* entry);
63
64 // Called by JVMTI code to add boot classpath
65 static void append_boot_classpath(ClassPathEntry* new_entry);
66
67 static void setup_search_paths(JavaThread* current);
68 static void setup_module_paths(JavaThread* current);
69 static void extract_jar_files_from_path(const char* path, GrowableArray<const char*>* module_paths);
70 static int compare_module_names(const char** p1, const char** p2);
71
72 static char* read_manifest(JavaThread* current, ClassPathEntry* entry, jint *manifest_size) {
73 // Remove all the new-line continuations (which wrap long lines at 72 characters, see
74 // http://docs.oracle.com/javase/6/docs/technotes/guides/jar/jar.html#JAR%20Manifest), so
75 // that the manifest is easier to parse.
76 return read_manifest(current, entry, manifest_size, true);
77 }
78 static char* read_raw_manifest(JavaThread* current, ClassPathEntry* entry, jint *manifest_size) {
79 // Do not remove new-line continuations, so we can easily pass it as an argument to
80 // java.util.jar.Manifest.getManifest() at run-time.
81 return read_manifest(current, entry, manifest_size, false);
82 }
83
84 static jshort app_class_paths_start_index() { return _app_class_paths_start_index; }
85
86 static jshort app_module_paths_start_index() { return _app_module_paths_start_index; }
87
88 static jshort max_used_path_index() { return _max_used_path_index; }
89
90 static int num_module_paths() { return _num_module_paths; }
91
92 static void set_max_used_path_index(jshort used_index) {
93 _max_used_path_index = used_index;
94 }
95
96 static void init_paths_start_index(jshort app_start) {
97 _app_class_paths_start_index = app_start;
98 }
99
100 static void init_app_module_paths_start_index(jshort module_start) {
101 _app_module_paths_start_index = module_start;
102 }
103
104 static void init_num_module_paths(int num_module_paths) {
105 _num_module_paths = num_module_paths;
106 }
107
108 static bool is_boot_classpath(int classpath_index) {
109 return classpath_index < _app_class_paths_start_index;
110 }
111
112 static bool has_platform_or_app_classes() {
113 return _has_app_classes || _has_platform_classes;
114 }
115
116 static bool has_non_jar_in_classpath() {
117 return _has_non_jar_in_classpath;
118 }
119
120 static void record_result(const s2 classpath_index, InstanceKlass* result, bool redefined);
121 static void set_has_app_classes() {
122 _has_app_classes = true;
123 }
124 static void set_has_platform_classes() {
125 _has_platform_classes = true;
126 }
127 static void set_has_non_jar_in_classpath() {
128 _has_non_jar_in_classpath = true;
129 }
130 #endif // INCLUDE_CDS
131 };
132
133 #endif // SHARE_CLASSFILE_CLASSLOADEREXT_HPP