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 "runtime/arguments.hpp" 33 #include "utilities/ostream.hpp" 34 35 void SharedPathsMiscInfo::add_path(const char* path, int type) { 36 log_info(classpath)("type=%s ", type_name(type)); 37 ClassLoader::trace_class_path("add misc shared path ", path); 38 write(path, strlen(path) + 1); 39 write_jint(jint(type)); 40 } 41 42 void SharedPathsMiscInfo::ensure_size(size_t needed_bytes) { 43 assert(_allocated, "cannot modify buffer during validation."); 44 int used = get_used_bytes(); 45 int target = used + int(needed_bytes); 46 if (target > _buf_size) { 47 _buf_size = _buf_size * 2 + (int)needed_bytes; 48 _buf_start = REALLOC_C_HEAP_ARRAY(char, _buf_start, _buf_size, mtClass); 49 _cur_ptr = _buf_start + used; 50 _end_ptr = _buf_start + _buf_size; 51 } 52 } 53 54 void SharedPathsMiscInfo::write(const void* ptr, size_t size) { 55 ensure_size(size); 56 memcpy(_cur_ptr, ptr, size); 57 _cur_ptr += size; 58 } 59 60 bool SharedPathsMiscInfo::read(void* ptr, size_t size) { 61 if (_cur_ptr + size <= _end_ptr) { 62 memcpy(ptr, _cur_ptr, size); 63 _cur_ptr += size; 64 return true; 65 } 66 return false; 67 } 68 69 bool SharedPathsMiscInfo::fail(const char* msg, const char* name) { 70 ClassLoader::trace_class_path(msg, name); 71 MetaspaceShared::set_archive_loading_failed(); 72 return false; 73 } 74 75 bool SharedPathsMiscInfo::check() { 76 // The whole buffer must be 0 terminated so that we can use strlen and strcmp 77 // without fear. 78 _end_ptr -= sizeof(jint); 79 if (_cur_ptr >= _end_ptr) { 80 return fail("Truncated archive file header"); 81 } 82 if (*_end_ptr != 0) { 83 return fail("Corrupted archive file header"); 84 } 85 86 while (_cur_ptr < _end_ptr) { 87 jint type; 88 const char* path = _cur_ptr; 89 _cur_ptr += strlen(path) + 1; 90 if (!read_jint(&type)) { 91 return fail("Corrupted archive file header"); 92 } 93 log_info(classpath)("type=%s ", type_name(type)); 94 print_path(type, path); 95 if (!check(type, path)) { 96 if (!PrintSharedArchiveAndExit) { 97 return false; 98 } 99 } else { 100 ClassLoader::trace_class_path("ok"); 101 } 102 } 103 104 return true; 105 } 106 107 bool SharedPathsMiscInfo::check(jint type, const char* path) { 108 switch (type) { 109 case BOOT: 110 if (os::file_name_strcmp(path, Arguments::get_sysclasspath()) != 0) { 111 return fail("[BOOT classpath mismatch, actual: -Dsun.boot.class.path=", Arguments::get_sysclasspath()); 112 } 113 break; 114 case NON_EXIST: // fall-through 115 case REQUIRED: 116 { 117 struct stat st; 118 if (os::stat(path, &st) != 0) { 119 // The file does not actually exist 120 if (type == REQUIRED) { 121 // but we require it to exist -> fail 122 return fail("Required file doesn't exist"); 123 } 124 } else { 125 // The file actually exists 126 if (type == NON_EXIST) { 127 // But we want it to not exist -> fail 128 return fail("File must not exist"); 129 } 130 time_t timestamp; 131 long filesize; 132 133 if (!read_time(×tamp) || !read_long(&filesize)) { 134 return fail("Corrupted archive file header"); 135 } 136 if (timestamp != st.st_mtime) { 137 return fail("Timestamp mismatch"); 138 } 139 if (filesize != st.st_size) { 140 return fail("File size mismatch"); 141 } 142 } 143 } 144 break; 145 146 default: 147 return fail("Corrupted archive file header"); 148 } 149 150 return true; 151 }