1 /*
2 * Copyright (c) 2014, 2015, 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 if (log_is_enabled(Info, classpath)) {
37 ResourceMark rm;
38 outputStream* log = LogHandle(classpath)::info_stream();
39 log->print("type=%s ", type_name(type));
40 ClassLoader::trace_class_path(log, "add misc shared path ", path);
41 }
42 write(path, strlen(path) + 1);
43 write_jint(jint(type));
44 }
45
46 void SharedPathsMiscInfo::ensure_size(size_t needed_bytes) {
47 assert(_allocated, "cannot modify buffer during validation.");
48 int used = get_used_bytes();
49 int target = used + int(needed_bytes);
50 if (target > _buf_size) {
51 _buf_size = _buf_size * 2 + (int)needed_bytes;
52 _buf_start = REALLOC_C_HEAP_ARRAY(char, _buf_start, _buf_size, mtClass);
53 _cur_ptr = _buf_start + used;
54 _end_ptr = _buf_start + _buf_size;
55 }
56 }
57
58 void SharedPathsMiscInfo::write(const void* ptr, size_t size) {
59 ensure_size(size);
60 memcpy(_cur_ptr, ptr, size);
61 _cur_ptr += size;
62 }
63
64 bool SharedPathsMiscInfo::read(void* ptr, size_t size) {
65 if (_cur_ptr + size <= _end_ptr) {
66 memcpy(ptr, _cur_ptr, size);
67 _cur_ptr += size;
68 return true;
69 }
70 return false;
71 }
72
73 bool SharedPathsMiscInfo::fail(const char* msg, const char* name) {
74 ClassLoader::trace_class_path(tty, msg, name);
75 MetaspaceShared::set_archive_loading_failed();
76 return false;
77 }
78
79 bool SharedPathsMiscInfo::check() {
80 // The whole buffer must be 0 terminated so that we can use strlen and strcmp
81 // without fear.
82 _end_ptr -= sizeof(jint);
83 if (_cur_ptr >= _end_ptr) {
84 return fail("Truncated archive file header");
85 }
86 if (*_end_ptr != 0) {
87 return fail("Corrupted archive file header");
88 }
89
90 while (_cur_ptr < _end_ptr) {
91 jint type;
92 const char* path = _cur_ptr;
93 _cur_ptr += strlen(path) + 1;
94 if (!read_jint(&type)) {
95 return fail("Corrupted archive file header");
96 }
97 if (log_is_enabled(Info, classpath)) {
98 ResourceMark rm;
99 outputStream* log = LogHandle(classpath)::info_stream();
100 log->print("type=%s ", type_name(type));
101 print_path(log, type, path);
102 }
103 if (!check(type, path)) {
104 if (!PrintSharedArchiveAndExit) {
105 return false;
106 }
107 } else {
108 trace_class_path("[ok]");
109 }
110 }
111
112 return true;
113 }
114
115 bool SharedPathsMiscInfo::check(jint type, const char* path) {
116 switch (type) {
117 case BOOT:
118 if (os::file_name_strcmp(path, Arguments::get_sysclasspath()) != 0) {
119 return fail("[BOOT classpath mismatch, actual: -Dsun.boot.class.path=", Arguments::get_sysclasspath());
120 }
121 break;
122 case NON_EXIST: // fall-through
123 case REQUIRED:
124 {
125 struct stat st;
126 if (os::stat(path, &st) != 0) {
127 // The file does not actually exist
128 if (type == REQUIRED) {
129 // but we require it to exist -> fail
130 return fail("Required file doesn't exist");
131 }
132 } else {
133 // The file actually exists
134 if (type == NON_EXIST) {
135 // But we want it to not exist -> fail
136 return fail("File must not exist");
137 }
138 time_t timestamp;
139 long filesize;
140
141 if (!read_time(×tamp) || !read_long(&filesize)) {
142 return fail("Corrupted archive file header");
143 }
144 if (timestamp != st.st_mtime) {
145 return fail("Timestamp mismatch");
146 }
147 if (filesize != st.st_size) {
148 return fail("File size mismatch");
149 }
150 }
151 }
152 break;
153
154 default:
155 return fail("Corrupted archive file header");
156 }
157
158 return true;
159 }