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 SharedPathsMiscInfo::SharedPathsMiscInfo() {
38 _buf_size = INITIAL_BUF_SIZE;
39 _cur_ptr = _buf_start = NEW_C_HEAP_ARRAY(char, _buf_size, mtClass);
40 _allocated = true;
41 }
42
43 SharedPathsMiscInfo::~SharedPathsMiscInfo() {
44 if (_allocated) {
45 FREE_C_HEAP_ARRAY(char, _buf_start);
46 }
47 }
48
49 void SharedPathsMiscInfo::add_path(const char* path, int type) {
50 log_info(class, path)("type=%s ", type_name(type));
51 ClassLoader::trace_class_path("add misc shared path ", path);
52 write(path, strlen(path) + 1);
53 write_jint(jint(type));
54 }
55
56 void SharedPathsMiscInfo::ensure_size(size_t needed_bytes) {
57 assert(_allocated, "cannot modify buffer during validation.");
58 int used = get_used_bytes();
59 int target = used + int(needed_bytes);
60 if (target > _buf_size) {
61 _buf_size = _buf_size * 2 + (int)needed_bytes;
62 _buf_start = REALLOC_C_HEAP_ARRAY(char, _buf_start, _buf_size, mtClass);
63 _cur_ptr = _buf_start + used;
64 _end_ptr = _buf_start + _buf_size;
65 }
66 }
67
68 void SharedPathsMiscInfo::write(const void* ptr, size_t size) {
69 ensure_size(size);
70 memcpy(_cur_ptr, ptr, size);
71 _cur_ptr += size;
72 }
73
74 bool SharedPathsMiscInfo::read(void* ptr, size_t size) {
75 if (_cur_ptr + size <= _end_ptr) {
76 memcpy(ptr, _cur_ptr, size);
77 _cur_ptr += size;
78 return true;
79 }
80 return false;
81 }
82
83 bool SharedPathsMiscInfo::fail(const char* msg, const char* name) {
84 ClassLoader::trace_class_path(msg, name);
85 MetaspaceShared::set_archive_loading_failed();
86 return false;
87 }
88
89 void SharedPathsMiscInfo::print_path(outputStream* out, int type, const char* path) {
90 switch (type) {
91 case BOOT:
92 out->print("Expecting BOOT path=%s", path);
93 break;
94 case NON_EXIST:
95 out->print("Expecting that %s does not exist", path);
96 break;
97 default:
98 ShouldNotReachHere();
99 }
100 }
101
102 bool SharedPathsMiscInfo::check() {
103 // The whole buffer must be 0 terminated so that we can use strlen and strcmp
104 // without fear.
105 _end_ptr -= sizeof(jint);
106 if (_cur_ptr >= _end_ptr) {
107 return fail("Truncated archive file header");
108 }
109 if (*_end_ptr != 0) {
110 return fail("Corrupted archive file header");
111 }
112
113 while (_cur_ptr < _end_ptr) {
114 jint type;
115 const char* path = _cur_ptr;
116 _cur_ptr += strlen(path) + 1;
117 if (!read_jint(&type)) {
118 return fail("Corrupted archive file header");
119 }
120 LogTarget(Info, class, path) lt;
121 if (lt.is_enabled()) {
122 lt.print("type=%s ", type_name(type));
123 LogStream ls(lt);
124 print_path(&ls, type, path);
125 ls.cr();
126 }
127 if (!check(type, path)) {
128 if (!PrintSharedArchiveAndExit) {
129 return false;
130 }
131 } else {
132 ClassLoader::trace_class_path("ok");
133 }
134 }
135
136 return true;
137 }
138
139 bool SharedPathsMiscInfo::check(jint type, const char* path) {
140 switch (type) {
141 case BOOT:
142 // In the future we should perform the check based on the content of the mapped archive.
143 if (UseAppCDS && os::file_name_strcmp(path, Arguments::get_sysclasspath()) != 0) {
144 return fail("[BOOT classpath mismatch, actual =", Arguments::get_sysclasspath());
145 }
146 break;
147 case NON_EXIST:
148 {
149 struct stat st;
150 if (os::stat(path, &st) == 0) {
151 // The file actually exists
152 // But we want it to not exist -> fail
153 return fail("File must not exist");
154 }
155 }
156 break;
157 default:
158 return fail("Corrupted archive file header");
159 }
160
161 return true;
162 }