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/classLoaderData.inline.hpp" 28 #include "classfile/sharedPathsMiscInfo.hpp" 29 #include "logging/log.hpp" 30 #include "logging/logStream.hpp" 31 #include "memory/allocation.inline.hpp" 32 #include "memory/metaspaceShared.hpp" 33 #include "memory/resourceArea.hpp" 34 #include "runtime/arguments.hpp" 35 #include "utilities/ostream.hpp" 36 37 void SharedPathsMiscInfo::add_path(const char* path, int type) { 38 log_info(class, path)("type=%s ", type_name(type)); 39 ClassLoader::trace_class_path("add misc shared path ", path); 40 write(path, strlen(path) + 1); 41 write_jint(jint(type)); 42 } 43 44 void SharedPathsMiscInfo::ensure_size(size_t needed_bytes) { 45 assert(_allocated, "cannot modify buffer during validation."); 46 int used = get_used_bytes(); 47 int target = used + int(needed_bytes); 48 if (target > _buf_size) { 49 _buf_size = _buf_size * 2 + (int)needed_bytes; 50 _buf_start = REALLOC_C_HEAP_ARRAY(char, _buf_start, _buf_size, mtClass); 51 _cur_ptr = _buf_start + used; 52 _end_ptr = _buf_start + _buf_size; 53 } 54 } 55 56 void SharedPathsMiscInfo::write(const void* ptr, size_t size) { 57 ensure_size(size); 58 memcpy(_cur_ptr, ptr, size); 59 _cur_ptr += size; 60 } 61 62 bool SharedPathsMiscInfo::read(void* ptr, size_t size) { 63 if (_cur_ptr + size <= _end_ptr) { 64 memcpy(ptr, _cur_ptr, size); 65 _cur_ptr += size; 66 return true; 67 } 68 return false; 69 } 70 71 bool SharedPathsMiscInfo::fail(const char* msg, const char* name) { 72 ClassLoader::trace_class_path(msg, name); 73 MetaspaceShared::set_archive_loading_failed(); 74 return false; 75 } 76 77 void SharedPathsMiscInfo::print_path(outputStream* out, int type, const char* path) { 78 switch (type) { 79 case BOOT: 80 out->print("Expecting BOOT path=%s", path); 81 break; 82 case NON_EXIST: 83 out->print("Expecting that %s does not exist", path); 84 break; 85 default: 86 ShouldNotReachHere(); 87 } 88 } 89 90 bool SharedPathsMiscInfo::check() { 91 // The whole buffer must be 0 terminated so that we can use strlen and strcmp 92 // without fear. 93 _end_ptr -= sizeof(jint); 94 if (_cur_ptr >= _end_ptr) { 95 return fail("Truncated archive file header"); 96 } 97 if (*_end_ptr != 0) { 98 return fail("Corrupted archive file header"); 99 } 100 101 while (_cur_ptr < _end_ptr) { 102 jint type; 103 const char* path = _cur_ptr; 104 _cur_ptr += strlen(path) + 1; 105 if (!read_jint(&type)) { 106 return fail("Corrupted archive file header"); 107 } 108 LogTarget(Info, class, path) lt; 109 if (lt.is_enabled()) { 110 lt.print("type=%s ", type_name(type)); 111 LogStream ls(lt); 112 print_path(&ls, type, path); 113 ls.cr(); 114 } 115 if (!check(type, path)) { 116 if (!PrintSharedArchiveAndExit) { 117 return false; 118 } 119 } else { 120 ClassLoader::trace_class_path("ok"); 121 } 122 } 123 124 return true; 125 } 126 127 bool SharedPathsMiscInfo::check(jint type, const char* path) { 128 switch (type) { 129 case BOOT: 130 if (os::file_name_strcmp(path, Arguments::get_sysclasspath()) != 0) { 131 return fail("[BOOT classpath mismatch, actual =", Arguments::get_sysclasspath()); 132 } 133 break; 134 case NON_EXIST: 135 { 136 struct stat st; 137 if (os::stat(path, &st) == 0) { 138 // The file actually exists 139 // But we want it to not exist -> fail 140 return fail("File must not exist"); 141 } 142 } 143 break; 144 default: 145 return fail("Corrupted archive file header"); 146 } 147 148 return true; 149 }