1 /* 2 * Copyright (c) 2014, 2018, 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_VM_CLASSFILE_CLASSLOADEREXT_HPP 26 #define SHARE_VM_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 enum SomeConstants { 37 max_classpath_index = 0x7fff 38 }; 39 40 private: 41 #if INCLUDE_CDS 42 static char* get_class_path_attr(const char* jar_path, char* manifest, jint manifest_size); 43 static void setup_app_search_path(); // Only when -Xshare:dump 44 static void process_module_table(ModuleEntryTable* met, TRAPS); 45 static SharedPathsMiscInfo* shared_paths_misc_info() { 46 return (SharedPathsMiscInfo*)_shared_paths_misc_info; 47 } 48 // index of first app JAR in shared classpath entry table 49 static jshort _app_class_paths_start_index; 50 // index of first modular JAR in shared modulepath entry table 51 static jshort _app_module_paths_start_index; 52 // the largest path index being used during CDS dump time 53 static jshort _max_used_path_index; 54 55 static bool _has_app_classes; 56 static bool _has_platform_classes; 57 #endif 58 59 public: 60 CDS_ONLY(static void process_jar_manifest(ClassPathEntry* entry, bool check_for_duplicates);) 61 62 static bool should_verify(int classpath_index) { 63 CDS_ONLY(return (classpath_index >= _app_class_paths_start_index);) 64 NOT_CDS(return false;) 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() NOT_CDS_RETURN; 70 static void setup_module_paths(TRAPS) NOT_CDS_RETURN; 71 72 #if INCLUDE_CDS 73 private: 74 static char* read_manifest(ClassPathEntry* entry, jint *manifest_size, bool clean_text, TRAPS); 75 static ClassPathEntry* find_classpath_entry_from_cache(const char* path, TRAPS); 76 77 public: 78 static char* read_manifest(ClassPathEntry* entry, jint *manifest_size, TRAPS) { 79 // Remove all the new-line continuations (which wrap long lines at 72 characters, see 80 // http://docs.oracle.com/javase/6/docs/technotes/guides/jar/jar.html#JAR%20Manifest), so 81 // that the manifest is easier to parse. 82 return read_manifest(entry, manifest_size, true, THREAD); 83 } 84 static char* read_raw_manifest(ClassPathEntry* entry, jint *manifest_size, TRAPS) { 85 // Do not remove new-line continuations, so we can easily pass it as an argument to 86 // java.util.jar.Manifest.getManifest() at run-time. 87 return read_manifest(entry, manifest_size, false, THREAD); 88 } 89 90 static void finalize_shared_paths_misc_info(); 91 92 static jshort app_class_paths_start_index() { return _app_class_paths_start_index; } 93 94 static jshort app_module_paths_start_index() { return _app_module_paths_start_index; } 95 96 static jshort max_used_path_index() { return _max_used_path_index; } 97 98 static void set_max_used_path_index(jshort used_index) { 99 _max_used_path_index = used_index; 100 } 101 102 static void init_paths_start_index(jshort app_start) { 103 _app_class_paths_start_index = app_start; 104 } 105 106 static void init_app_module_paths_start_index(jshort module_start) { 107 _app_module_paths_start_index = module_start; 108 } 109 110 static bool is_boot_classpath(int classpath_index) { 111 return classpath_index < _app_class_paths_start_index; 112 } 113 114 static bool has_platform_or_app_classes() { 115 return _has_app_classes || _has_platform_classes; 116 } 117 118 static void record_result(const s2 classpath_index, 119 InstanceKlass* result, TRAPS); 120 static InstanceKlass* load_class(Symbol* h_name, const char* path, TRAPS); 121 static Klass* load_one_class(ClassListParser* parser, TRAPS); 122 static void set_has_app_classes() { 123 _has_app_classes = true; 124 } 125 static void set_has_platform_classes() { 126 _has_platform_classes = true; 127 } 128 #endif 129 }; 130 131 #endif // SHARE_VM_CLASSFILE_CLASSLOADEREXT_HPP