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(classpath)("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 = LogHandle(classpath)::info_stream(); 79 switch (type) { 80 case BOOT: 81 out->print("Expecting -Dsun.boot.class.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 default: 90 ShouldNotReachHere(); 91 } 92 } 93 94 bool SharedPathsMiscInfo::check() { 95 // The whole buffer must be 0 terminated so that we can use strlen and strcmp 96 // without fear. 97 _end_ptr -= sizeof(jint); 98 if (_cur_ptr >= _end_ptr) { 99 return fail("Truncated archive file header"); 100 } 101 if (*_end_ptr != 0) { 102 return fail("Corrupted archive file header"); 103 } 104 105 while (_cur_ptr < _end_ptr) { 106 jint type; 107 const char* path = _cur_ptr; 108 _cur_ptr += strlen(path) + 1; 109 if (!read_jint(&type)) { 110 return fail("Corrupted archive file header"); 111 } 112 log_info(classpath)("type=%s ", type_name(type)); 113 print_path(type, path); 114 if (!check(type, path)) { 115 if (!PrintSharedArchiveAndExit) { 116 return false; 117 } 118 } else { 119 ClassLoader::trace_class_path("ok"); 120 } 121 } 122 123 return true; 124 } 125 126 bool SharedPathsMiscInfo::check(jint type, const char* path) { 127 switch (type) { 128 case BOOT: 129 if (os::file_name_strcmp(path, Arguments::get_sysclasspath()) != 0) { 130 return fail("[BOOT classpath mismatch, actual: -Dsun.boot.class.path=", Arguments::get_sysclasspath()); 131 } 132 break; 133 case NON_EXIST: // fall-through 134 case REQUIRED: 135 { 136 struct stat st; 137 if (os::stat(path, &st) != 0) { 138 // The file does not actually exist 139 if (type == REQUIRED) { 140 // but we require it to exist -> fail 141 return fail("Required file doesn't exist"); 142 } 143 } else { 144 // The file actually exists 145 if (type == NON_EXIST) { 146 // But we want it to not exist -> fail 147 return fail("File must not exist"); 148 } 149 time_t timestamp; 150 long filesize; 151 152 if (!read_time(×tamp) || !read_long(&filesize)) { 153 return fail("Corrupted archive file header"); 154 } 155 if (timestamp != st.st_mtime) { 156 return fail("Timestamp mismatch"); 157 } 158 if (filesize != st.st_size) { 159 return fail("File size mismatch"); 160 } 161 } 162 } 163 break; 164 165 default: 166 return fail("Corrupted archive file header"); 167 } 168 169 return true; 170 }