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