1 /* 2 * Copyright (c) 2014, 2017, 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 #include "precompiled.hpp" 26 #include "classfile/classLoader.hpp" 27 #include "classfile/classLoaderExt.hpp" 28 #include "classfile/dictionary.hpp" 29 #include "classfile/javaClasses.hpp" 30 #include "classfile/sharedClassUtil.hpp" 31 #include "classfile/stringTable.hpp" 32 #include "classfile/symbolTable.hpp" 33 #include "classfile/systemDictionary.hpp" 34 #include "classfile/systemDictionaryShared.hpp" 35 #include "memory/filemap.hpp" 36 #include "memory/metadataFactory.hpp" 37 #include "memory/resourceArea.hpp" 38 #include "oops/instanceKlass.hpp" 39 #include "runtime/arguments.hpp" 40 #include "runtime/java.hpp" 41 #include "runtime/os.hpp" 42 43 class ManifestStream: public ResourceObj { 44 private: 45 u1* _buffer_start; // Buffer bottom 46 u1* _buffer_end; // Buffer top (one past last element) 47 u1* _current; // Current buffer position 48 49 public: 50 // Constructor 51 ManifestStream(u1* buffer, int length) : _buffer_start(buffer), 52 _current(buffer) { 53 _buffer_end = buffer + length; 54 } 55 56 static bool is_attr(u1* attr, const char* name) { 57 return strncmp((const char*)attr, name, strlen(name)) == 0; 58 } 59 60 static char* copy_attr(u1* value, size_t len) { 61 char* buf = NEW_RESOURCE_ARRAY(char, len + 1); 62 strncpy(buf, (char*)value, len); 63 buf[len] = 0; 64 return buf; 65 } 66 67 // The return value indicates if the JAR is signed or not 68 bool check_is_signed() { 69 u1* attr = _current; 70 bool isSigned = false; 71 while (_current < _buffer_end) { 72 if (*_current == '\n') { 73 *_current = '\0'; 74 u1* value = (u1*)strchr((char*)attr, ':'); 75 if (value != NULL) { 76 assert(*(value+1) == ' ', "Unrecognized format" ); 77 if (strstr((char*)attr, "-Digest") != NULL) { 78 isSigned = true; 79 break; 80 } 81 } 82 *_current = '\n'; // restore 83 attr = _current + 1; 84 } 85 _current ++; 86 } 87 return isSigned; 88 } 89 }; 90 91 void SharedPathsMiscInfoExt::print_path(outputStream* out, int type, const char* path) { 92 switch(type) { 93 case APP: 94 ClassLoader::trace_class_path("Expecting -Djava.class.path=", path); 95 break; 96 default: 97 SharedPathsMiscInfo::print_path(out, type, path); 98 } 99 } 100 101 bool SharedPathsMiscInfoExt::check(jint type, const char* path) { 102 103 switch (type) { 104 case APP: 105 { 106 // Prefix is OK: E.g., dump with -cp foo.jar, but run with -cp foo.jar:bar.jar 107 size_t len = strlen(path); 108 const char *appcp = Arguments::get_appclasspath(); 109 assert(appcp != NULL, "NULL app classpath"); 110 size_t appcp_len = strlen(appcp); 111 if (appcp_len < len) { 112 return fail("Run time APP classpath is shorter than the one at dump time: ", appcp); 113 } 114 ResourceMark rm; 115 char* tmp_path; 116 if (len == appcp_len) { 117 tmp_path = (char*)appcp; 118 } else { 119 tmp_path = NEW_RESOURCE_ARRAY(char, len + 1); 120 strncpy(tmp_path, appcp, len); 121 tmp_path[len] = 0; 122 } 123 if (os::file_name_strcmp(path, tmp_path) != 0) { 124 return fail("[APP classpath mismatch, actual: -Djava.class.path=", appcp); 125 } 126 if (appcp[len] != '\0' && appcp[len] != os::path_separator()[0]) { 127 return fail("Dump time APP classpath is not a proper prefix of run time APP classpath: ", appcp); 128 } 129 } 130 break; 131 default: 132 return SharedPathsMiscInfo::check(type, path); 133 } 134 135 return true; 136 } 137 138 void SharedClassUtil::update_shared_classpath(ClassPathEntry *cpe, SharedClassPathEntry* e, TRAPS) { 139 ClassLoaderData* loader_data = ClassLoaderData::the_null_class_loader_data(); 140 SharedClassPathEntryExt* ent = (SharedClassPathEntryExt*)e; 141 ResourceMark rm(THREAD); 142 jint manifest_size; 143 bool isSigned; 144 145 if (cpe->is_jar_file()) { 146 char* manifest = ClassLoaderExt::read_manifest(cpe, &manifest_size, CHECK); 147 if (manifest != NULL) { 148 ManifestStream* stream = new ManifestStream((u1*)manifest, 149 manifest_size); 150 isSigned = stream->check_is_signed(); 151 if (isSigned) { 152 ent->_is_signed = true; 153 } else { 154 // Copy the manifest into the shared archive 155 manifest = ClassLoaderExt::read_raw_manifest(cpe, &manifest_size, CHECK); 156 Array<u1>* buf = MetadataFactory::new_array<u1>(loader_data, 157 manifest_size, 158 THREAD); 159 char* p = (char*)(buf->data()); 160 memcpy(p, manifest, manifest_size); 161 ent->set_manifest(buf); 162 ent->_is_signed = false; 163 } 164 } 165 } 166 } 167 168 void SharedClassUtil::initialize(TRAPS) { 169 if (UseSharedSpaces) { 170 int size = FileMapInfo::get_number_of_share_classpaths(); 171 if (size > 0) { 172 SystemDictionaryShared::allocate_shared_data_arrays(size, THREAD); 173 if (!DumpSharedSpaces) { 174 FileMapHeaderExt* header = (FileMapHeaderExt*)FileMapInfo::current_info()->header(); 175 ClassLoaderExt::init_paths_start_index(header->_app_paths_start_index); 176 } 177 } 178 } 179 180 if (DumpSharedSpaces) { 181 if (SharedArchiveConfigFile) { 182 read_extra_data(SharedArchiveConfigFile, THREAD); 183 } 184 } 185 } 186 187 void SharedClassUtil::read_extra_data(const char* filename, TRAPS) { 188 HashtableTextDump reader(filename); 189 reader.check_version("VERSION: 1.0"); 190 191 while (reader.remain() > 0) { 192 int utf8_length; 193 int prefix_type = reader.scan_prefix(&utf8_length); 194 ResourceMark rm(THREAD); 195 char* utf8_buffer = NEW_RESOURCE_ARRAY(char, utf8_length); 196 reader.get_utf8(utf8_buffer, utf8_length); 197 198 if (prefix_type == HashtableTextDump::SymbolPrefix) { 199 SymbolTable::new_symbol(utf8_buffer, utf8_length, THREAD); 200 } else{ 201 assert(prefix_type == HashtableTextDump::StringPrefix, "Sanity"); 202 utf8_buffer[utf8_length] = '\0'; 203 oop s = StringTable::intern(utf8_buffer, THREAD); 204 } 205 } 206 } 207 208 bool SharedClassUtil::is_classpath_entry_signed(int classpath_index) { 209 assert(classpath_index >= 0, "Sanity"); 210 SharedClassPathEntryExt* ent = (SharedClassPathEntryExt*) 211 FileMapInfo::shared_classpath(classpath_index); 212 return ent->_is_signed; 213 } 214 215 void FileMapHeaderExt::populate(FileMapInfo* mapinfo, size_t alignment) { 216 FileMapInfo::FileMapHeader::populate(mapinfo, alignment); 217 218 ClassLoaderExt::finalize_shared_paths_misc_info(); 219 _app_paths_start_index = ClassLoaderExt::app_paths_start_index(); 220 221 _verify_local = BytecodeVerificationLocal; 222 _verify_remote = BytecodeVerificationRemote; 223 _has_platform_or_app_classes = ClassLoaderExt::has_platform_or_app_classes(); 224 } 225 226 bool FileMapHeaderExt::validate() { 227 if (UseAppCDS) { 228 const char* prop = Arguments::get_property("java.system.class.loader"); 229 if (prop != NULL) { 230 warning("UseAppCDS is disabled because the java.system.class.loader property is specified (value = \"%s\"). " 231 "To enable UseAppCDS, this property must be not be set", prop); 232 UseAppCDS = false; 233 } 234 } 235 236 if (!FileMapInfo::FileMapHeader::validate()) { 237 return false; 238 } 239 240 // For backwards compatibility, we don't check the verification setting 241 // if the archive only contains system classes. 242 if (_has_platform_or_app_classes && 243 ((!_verify_local && BytecodeVerificationLocal) || 244 (!_verify_remote && BytecodeVerificationRemote))) { 245 FileMapInfo::fail_continue("The shared archive file was created with less restrictive " 246 "verification setting than the current setting."); 247 return false; 248 } 249 250 return true; 251 }