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20375
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1 /*
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2 * Copyright (c) 2014, Oracle and/or its affiliates. All rights reserved.
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3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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4 *
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5 * This code is free software; you can redistribute it and/or modify it
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6 * under the terms of the GNU General Public License version 2 only, as
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7 * published by the Free Software Foundation.
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8 *
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9 * This code is distributed in the hope that it will be useful, but WITHOUT
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10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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12 * version 2 for more details (a copy is included in the LICENSE file that
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13 * accompanied this code).
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14 *
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15 * You should have received a copy of the GNU General Public License version
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16 * 2 along with this work; if not, write to the Free Software Foundation,
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17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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18 *
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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20 * or visit www.oracle.com if you need additional information or have any
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21 * questions.
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22 *
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23 */
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24
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25 #include "precompiled.hpp"
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26 #include "classfile/classLoader.hpp"
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27 #include "classfile/classLoaderData.inline.hpp"
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28 #include "classfile/sharedPathsMiscInfo.hpp"
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29 #include "memory/allocation.inline.hpp"
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30 #include "memory/metaspaceShared.hpp"
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31 #include "runtime/arguments.hpp"
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32
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33 void SharedPathsMiscInfo::add_path(const char* path, int type) {
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34 if (TraceClassPaths) {
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35 tty->print("[type=%s] ", type_name(type));
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36 trace_class_path("[Add misc shared path ", path);
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37 }
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38 write(path, strlen(path) + 1);
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39 write_jint(jint(type));
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40 }
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41
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42 void SharedPathsMiscInfo::ensure_size(size_t needed_bytes) {
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43 assert(_allocated, "cannot modify buffer during validation.");
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44 int used = get_used_bytes();
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45 int target = used + int(needed_bytes);
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46 if (target > _buf_size) {
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47 _buf_size = _buf_size * 2 + (int)needed_bytes;
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48 _buf_start = REALLOC_C_HEAP_ARRAY(char, _buf_start, _buf_size, mtClass);
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49 _cur_ptr = _buf_start + used;
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50 _end_ptr = _buf_start + _buf_size;
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51 }
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52 }
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53
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54 void SharedPathsMiscInfo::write(const void* ptr, size_t size) {
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55 ensure_size(size);
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56 memcpy(_cur_ptr, ptr, size);
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57 _cur_ptr += size;
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58 }
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59
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60 bool SharedPathsMiscInfo::read(void* ptr, size_t size) {
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61 if (_cur_ptr + size <= _end_ptr) {
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62 memcpy(ptr, _cur_ptr, size);
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63 _cur_ptr += size;
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64 return true;
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65 }
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66 return false;
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67 }
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68
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69 bool SharedPathsMiscInfo::fail(const char* msg, const char* name) {
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70 ClassLoader::trace_class_path(msg, name);
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71 MetaspaceShared::set_archive_loading_failed();
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72 return false;
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73 }
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74
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75 bool SharedPathsMiscInfo::check() {
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76 // The whole buffer must be 0 terminated so that we can use strlen and strcmp
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77 // without fear.
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78 _end_ptr -= sizeof(jint);
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79 if (_cur_ptr >= _end_ptr) {
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80 return fail("Truncated archive file header");
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81 }
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82 if (*_end_ptr != 0) {
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83 return fail("Corrupted archive file header");
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84 }
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85
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86 while (_cur_ptr < _end_ptr) {
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87 jint type;
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88 const char* path = _cur_ptr;
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89 _cur_ptr += strlen(path) + 1;
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90 if (!read_jint(&type)) {
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91 return fail("Corrupted archive file header");
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92 }
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93 if (TraceClassPaths) {
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94 tty->print("[type=%s ", type_name(type));
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95 print_path(tty, type, path);
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96 tty->print_cr("]");
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97 }
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98 if (!check(type, path)) {
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99 if (!PrintSharedArchiveAndExit) {
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100 return false;
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101 }
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102 } else {
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103 trace_class_path("[ok");
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104 }
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105 }
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106
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107 return true;
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108 }
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109
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110 bool SharedPathsMiscInfo::check(jint type, const char* path) {
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111 switch (type) {
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112 case BOOT:
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113 if (strcmp(path, Arguments::get_sysclasspath()) != 0) {
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114 return fail("[BOOT classpath mismatch, actual: -Dsun.boot.class.path=", Arguments::get_sysclasspath());
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115 }
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116 break;
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117 case NON_EXIST: // fall-through
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118 case REQUIRED:
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119 {
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120 struct stat st;
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121 if (os::stat(path, &st) != 0) {
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122 // The file does not actually exist
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123 if (type == REQUIRED) {
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124 // but we require it to exist -> fail
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125 return fail("Required file doesn't exist");
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126 }
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127 } else {
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128 // The file actually exists
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129 if (type == NON_EXIST) {
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130 // But we want it to not exist -> fail
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131 return fail("File must not exist");
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132 }
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133 time_t timestamp;
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134 long filesize;
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135
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136 if (!read_time(×tamp) || !read_long(&filesize)) {
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137 return fail("Corrupted archive file header");
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138 }
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139 if (timestamp != st.st_mtime) {
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140 return fail("Timestamp mismatch");
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141 }
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20376
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142 if (filesize != st.st_size) {
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20375
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143 return fail("File size mismatch");
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144 }
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145 }
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146 }
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147 break;
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148
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149 default:
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150 return fail("Corrupted archive file header");
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151 }
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152
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153 return true;
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154 }
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