1
2 /**
3 * Copyright (C) 2018-present MongoDB, Inc.
4 *
5 * This program is free software: you can redistribute it and/or modify
6 * it under the terms of the Server Side Public License, version 1,
7 * as published by MongoDB, Inc.
8 *
9 * This program is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 * Server Side Public License for more details.
13 *
14 * You should have received a copy of the Server Side Public License
15 * along with this program. If not, see
16 * <http://www.mongodb.com/licensing/server-side-public-license>.
17 *
18 * As a special exception, the copyright holders give permission to link the
19 * code of portions of this program with the OpenSSL library under certain
20 * conditions as described in each individual source file and distribute
21 * linked combinations including the program with the OpenSSL library. You
22 * must comply with the Server Side Public License in all respects for
23 * all of the code used other than as permitted herein. If you modify file(s)
24 * with this exception, you may extend this exception to your version of the
25 * file(s), but you are not obligated to do so. If you do not wish to do so,
26 * delete this exception statement from your version. If you delete this
27 * exception statement from all source files in the program, then also delete
28 * it in the license file.
29 */
30 #define MONGO_LOG_DEFAULT_COMPONENT ::mongo::logger::LogComponent::kControl
31
32 #include "mongo/platform/basic.h"
33
34 #include "mongo/platform/shared_library.h"
35
36 #include <boost/filesystem.hpp>
37
38 #include "mongo/util/assert_util.h"
39 #include "mongo/util/log.h"
40 #include "mongo/util/mongoutils/str.h"
41 #include "mongo/util/text.h"
42
43 namespace mongo {
44
~SharedLibrary()45 SharedLibrary::~SharedLibrary() {
46 if (_handle) {
47 if (FreeLibrary(static_cast<HMODULE>(_handle)) == 0) {
48 DWORD lasterror = GetLastError();
49 LOG(2) << "Load library close failed: " << errnoWithDescription(lasterror);
50 }
51 }
52 }
53
create(const boost::filesystem::path & full_path)54 StatusWith<std::unique_ptr<SharedLibrary>> SharedLibrary::create(
55 const boost::filesystem::path& full_path) {
56 LOG(1) << "Loading library: " << toUtf8String(full_path.c_str());
57
58 HMODULE handle = LoadLibraryW(full_path.c_str());
59 if (handle == nullptr) {
60 return StatusWith<std::unique_ptr<SharedLibrary>>(ErrorCodes::InternalError,
61 str::stream() << "Load library failed: "
62 << errnoWithDescription());
63 }
64
65 return StatusWith<std::unique_ptr<SharedLibrary>>(
66 std::unique_ptr<SharedLibrary>(new SharedLibrary(handle)));
67 }
68
getSymbol(StringData name)69 StatusWith<void*> SharedLibrary::getSymbol(StringData name) {
70 // StringData is not assued to be null-terminated
71 std::string symbolName = name.toString();
72
73 void* function = GetProcAddress(static_cast<HMODULE>(_handle), symbolName.c_str());
74
75 if (function == nullptr) {
76 DWORD gle = GetLastError();
77 if (gle != ERROR_PROC_NOT_FOUND) {
78 return StatusWith<void*>(ErrorCodes::InternalError,
79 str::stream() << "GetProcAddress failed for symbol: "
80 << errnoWithDescription());
81 }
82 }
83
84 return StatusWith<void*>(function);
85 }
86
87 } // namespace mongo
88