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 }