1 /* 2 * Copyright (c) 2014, 2019, 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(); // Only when -Xshare:dump 49 static void process_module_table(ModuleEntryTable* met, TRAPS); 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 60 static char* read_manifest(ClassPathEntry* entry, jint *manifest_size, bool clean_text, TRAPS); 61 static ClassPathEntry* find_classpath_entry_from_cache(const char* path, TRAPS); 62 63 public: 64 static void process_jar_manifest(ClassPathEntry* entry, bool check_for_duplicates); 65 66 // Called by JVMTI code to add boot classpath 67 static void append_boot_classpath(ClassPathEntry* new_entry); 68 69 static void setup_search_paths(); 70 static void setup_module_paths(TRAPS); 71 72 static char* read_manifest(ClassPathEntry* entry, jint *manifest_size, TRAPS) { 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(entry, manifest_size, true, THREAD); 77 } 78 static char* read_raw_manifest(ClassPathEntry* entry, jint *manifest_size, TRAPS) { 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(entry, manifest_size, false, THREAD); 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 void set_max_used_path_index(jshort used_index) { 91 _max_used_path_index = used_index; 92 } 93 94 static void init_paths_start_index(jshort app_start) { 95 _app_class_paths_start_index = app_start; 96 } 97 98 static void init_app_module_paths_start_index(jshort module_start) { 99 _app_module_paths_start_index = module_start; 100 } 101 102 static bool is_boot_classpath(int classpath_index) { 103 return classpath_index < _app_class_paths_start_index; 104 } 105 106 static bool has_platform_or_app_classes() { 107 return _has_app_classes || _has_platform_classes; 108 } 109 110 static void record_result(const s2 classpath_index, 111 InstanceKlass* result, TRAPS); 112 static InstanceKlass* load_class(Symbol* h_name, const char* path, TRAPS); 113 static void set_has_app_classes() { 114 _has_app_classes = true; 115 } 116 static void set_has_platform_classes() { 117 _has_platform_classes = true; 118 } 119 #endif 120 }; 121 122 #endif // SHARE_CLASSFILE_CLASSLOADEREXT_HPP