1 /* 2 * Copyright (c) 2014, 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_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 static bool should_verify(int classpath_index) { 37 CDS_ONLY(return (classpath_index >= _app_class_paths_start_index);) 38 NOT_CDS(return false;) 39 } 40 41 #if INCLUDE_CDS 42 private: 43 enum SomeConstants { 44 max_classpath_index = 0x7fff 45 }; 46 47 static char* get_class_path_attr(const char* jar_path, char* manifest, jint manifest_size); 48 static void setup_app_search_path(JavaThread* current); // Only when -Xshare:dump 49 static void process_module_table(JavaThread* current, ModuleEntryTable* met); 50 // index of first app JAR in shared classpath entry table 51 static jshort _app_class_paths_start_index; 52 // index of first modular JAR in shared modulepath entry table 53 static jshort _app_module_paths_start_index; 54 // the largest path index being used during CDS dump time 55 static jshort _max_used_path_index; 56 57 static bool _has_app_classes; 58 static bool _has_platform_classes; 59 static bool _has_non_jar_in_classpath; 60 61 static char* read_manifest(JavaThread* current, ClassPathEntry* entry, jint *manifest_size, bool clean_text); 62 static ClassPathEntry* get_class_path_entry(s2 classpath_index); 63 static void check_invalid_classpath_index(s2 classpath_index, InstanceKlass* ik); 64 public: 65 static void process_jar_manifest(JavaThread* current, ClassPathEntry* entry); 66 67 // Called by JVMTI code to add boot classpath 68 static void append_boot_classpath(ClassPathEntry* new_entry); 69 70 static void setup_search_paths(JavaThread* current); 71 static void setup_module_paths(JavaThread* current); 72 73 static char* read_manifest(JavaThread* current, ClassPathEntry* entry, jint *manifest_size) { 74 // Remove all the new-line continuations (which wrap long lines at 72 characters, see 75 // http://docs.oracle.com/javase/6/docs/technotes/guides/jar/jar.html#JAR%20Manifest), so 76 // that the manifest is easier to parse. 77 return read_manifest(current, entry, manifest_size, true); 78 } 79 static char* read_raw_manifest(JavaThread* current, ClassPathEntry* entry, jint *manifest_size) { 80 // Do not remove new-line continuations, so we can easily pass it as an argument to 81 // java.util.jar.Manifest.getManifest() at run-time. 82 return read_manifest(current, entry, manifest_size, false); 83 } 84 85 static jshort app_class_paths_start_index() { return _app_class_paths_start_index; } 86 87 static jshort app_module_paths_start_index() { return _app_module_paths_start_index; } 88 89 static jshort max_used_path_index() { return _max_used_path_index; } 90 91 static void set_max_used_path_index(jshort used_index) { 92 _max_used_path_index = used_index; 93 } 94 95 static void init_paths_start_index(jshort app_start) { 96 _app_class_paths_start_index = app_start; 97 } 98 99 static void init_app_module_paths_start_index(jshort module_start) { 100 _app_module_paths_start_index = module_start; 101 } 102 103 static bool is_boot_classpath(int classpath_index) { 104 return classpath_index < _app_class_paths_start_index; 105 } 106 107 static bool has_platform_or_app_classes() { 108 return _has_app_classes || _has_platform_classes; 109 } 110 111 static bool has_non_jar_in_classpath() { 112 return _has_non_jar_in_classpath; 113 } 114 115 static void record_result(const s2 classpath_index, InstanceKlass* result, bool redefined); 116 static void set_has_app_classes() { 117 _has_app_classes = true; 118 } 119 static void set_has_platform_classes() { 120 _has_platform_classes = true; 121 } 122 static void set_has_non_jar_in_classpath() { 123 _has_non_jar_in_classpath = true; 124 } 125 #endif // INCLUDE_CDS 126 }; 127 128 #endif // SHARE_CLASSFILE_CLASSLOADEREXT_HPP