1 /* 2 * Copyright (c) 2014, 2016, 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/classLoaderData.inline.hpp" 28 #include "classfile/sharedPathsMiscInfo.hpp" 29 #include "logging/log.hpp" 30 #include "memory/allocation.inline.hpp" 31 #include "memory/metaspaceShared.hpp" 32 #include "memory/resourceArea.hpp" 33 #include "runtime/arguments.hpp" 34 #include "utilities/ostream.hpp" 35 36 void SharedPathsMiscInfo::add_path(const char* path, int type) { 37 log_info(class, path)("type=%s ", type_name(type)); 38 ClassLoader::trace_class_path("add misc shared path ", path); 39 write(path, strlen(path) + 1); 40 write_jint(jint(type)); 41 } 42 43 void SharedPathsMiscInfo::ensure_size(size_t needed_bytes) { 44 assert(_allocated, "cannot modify buffer during validation."); 45 int used = get_used_bytes(); 46 int target = used + int(needed_bytes); 47 if (target > _buf_size) { 48 _buf_size = _buf_size * 2 + (int)needed_bytes; 49 _buf_start = REALLOC_C_HEAP_ARRAY(char, _buf_start, _buf_size, mtClass); 50 _cur_ptr = _buf_start + used; 51 _end_ptr = _buf_start + _buf_size; 52 } 53 } 54 55 void SharedPathsMiscInfo::write(const void* ptr, size_t size) { 56 ensure_size(size); 57 memcpy(_cur_ptr, ptr, size); 58 _cur_ptr += size; 59 } 60 61 bool SharedPathsMiscInfo::read(void* ptr, size_t size) { 62 if (_cur_ptr + size <= _end_ptr) { 63 memcpy(ptr, _cur_ptr, size); 64 _cur_ptr += size; 65 return true; 66 } 67 return false; 68 } 69 70 bool SharedPathsMiscInfo::fail(const char* msg, const char* name) { 71 ClassLoader::trace_class_path(msg, name); 72 MetaspaceShared::set_archive_loading_failed(); 73 return false; 74 } 75 76 void SharedPathsMiscInfo::print_path(int type, const char* path) { 77 ResourceMark rm; 78 outputStream* out = Log(class, path)::info_stream(); 79 switch (type) { 80 case BOOT: 81 out->print("Expecting BOOT path=%s", path); 82 break; 83 case NON_EXIST: 84 out->print("Expecting that %s does not exist", path); 85 break; 86 case REQUIRED: 87 out->print("Expecting that file %s must exist and is not altered", path); 88 break; 89 case PATCH_MOD: 90 out->print("Expecting --patch-module=%s", path); 91 break; 92 default: 93 ShouldNotReachHere(); 94 } 95 } 96 97 bool SharedPathsMiscInfo::check() { 98 // The whole buffer must be 0 terminated so that we can use strlen and strcmp 99 // without fear. 100 _end_ptr -= sizeof(jint); 101 if (_cur_ptr >= _end_ptr) { 102 return fail("Truncated archive file header"); 103 } 104 if (*_end_ptr != 0) { 105 return fail("Corrupted archive file header"); 106 } 107 108 while (_cur_ptr < _end_ptr) { 109 jint type; 110 const char* path = _cur_ptr; 111 _cur_ptr += strlen(path) + 1; 112 if (!read_jint(&type)) { 113 return fail("Corrupted archive file header"); 114 } 115 log_info(class, path)("type=%s ", type_name(type)); 116 print_path(type, path); 117 if (!check(type, path)) { 118 if (!PrintSharedArchiveAndExit) { 119 return false; 120 } 121 } else { 122 ClassLoader::trace_class_path("ok"); 123 } 124 } 125 126 return true; 127 } 128 129 bool SharedPathsMiscInfo::check(jint type, const char* path) { 130 switch (type) { 131 case BOOT: 132 if (os::file_name_strcmp(path, Arguments::get_sysclasspath()) != 0) { 133 return fail("[BOOT classpath mismatch, actual =", Arguments::get_sysclasspath()); 134 } 135 break; 136 case NON_EXIST: // fall-through 137 case REQUIRED: 138 { 139 struct stat st; 140 if (os::stat(path, &st) != 0) { 141 // The file does not actually exist 142 if (type == REQUIRED) { 143 // but we require it to exist -> fail 144 return fail("Required file doesn't exist"); 145 } 146 } else { 147 // The file actually exists 148 if (type == NON_EXIST) { 149 // But we want it to not exist -> fail 150 return fail("File must not exist"); 151 } 152 if ((st.st_mode & S_IFMT) != S_IFREG) { 153 return fail("Did not get a regular file as expected."); 154 } 155 time_t timestamp; 156 long filesize; 157 158 if (!read_time(×tamp) || !read_long(&filesize)) { 159 return fail("Corrupted archive file header"); 160 } 161 if (timestamp != st.st_mtime) { 162 return fail("Timestamp mismatch"); 163 } 164 if (filesize != st.st_size) { 165 return fail("File size mismatch"); 166 } 167 } 168 } 169 break; 170 case PATCH_MOD: 171 { 172 GrowableArray<ModulePatchPath*>* patch_mod_args = Arguments::get_patch_mod_prefix(); 173 if (patch_mod_args != NULL) { 174 int num_of_entries = patch_mod_args->length(); 175 for (int i = 0; i < num_of_entries; i++) { 176 const char* module_name = (patch_mod_args->at(i))->module_name(); 177 const char* path_string = (patch_mod_args->at(i))->path_string(); 178 size_t n = strlen(module_name); 179 // path contains the module name, followed by '=', and one or more entries. 180 // E.g.: "java.base=foo" or "java.naming=dir1:dir2:dir3" 181 if ((strncmp(module_name, path, n) != 0) || 182 (path[n] != '=') || 183 (strcmp(path + n + 1, path_string) != 0)) { 184 return fail("--patch-module mismatch, path not found in run time: ", path); 185 } 186 } 187 } 188 } 189 break; 190 default: 191 return fail("Corrupted archive file header"); 192 } 193 194 return true; 195 }