1 /*
2 * Copyright (c) 2024 Huawei Device Co., Ltd.
3 * Licensed under the Apache License, Version 2.0 (the "License");
4 * you may not use this file except in compliance with the License.
5 * You may obtain a copy of the License at
6 *
7 * http://www.apache.org/licenses/LICENSE-2.0
8 *
9 * Unless required by applicable law or agreed to in writing, software
10 * distributed under the License is distributed on an "AS IS" BASIS,
11 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
12 * See the License for the specific language governing permissions and
13 * limitations under the License.
14 */
15
16 #include "process_collector_impl.h"
17
18 #include <dlfcn.h>
19 #include <fstream>
20
21 #include "common_util.h"
22 #include "file_util.h"
23 #include "hiview_logger.h"
24 #include "process_decorator.h"
25
26 using namespace OHOS::HiviewDFX::UCollect;
27
28 namespace OHOS {
29 namespace HiviewDFX {
30 namespace UCollectUtil {
31 namespace {
32 DEFINE_LOG_TAG("UCollectUtil-ProcessCollector");
33 const std::string LIB_NAME = "libucollection_utility_ex.z.so";
34 const std::string GET_MEM_CG_PROCESSES_FUNC_NAME = "GetMemCgProcesses";
35 const std::string PROCESS_COLLECTOT_DIR = "/data/log/hiview/unified_collection/process/";
36 constexpr int32_t MAX_FILE_NUM = 10;
37 const std::string PREFIX = "memcg_process_";
38 const std::string SUFFIX = ".txt";
39 }
40
ProcessCollectorImpl()41 ProcessCollectorImpl::ProcessCollectorImpl()
42 {
43 handle_ = dlopen(LIB_NAME.c_str(), RTLD_LAZY);
44 if (handle_ == nullptr) {
45 HIVIEW_LOGW("dlopen failed, error: %{public}s", dlerror());
46 }
47 }
48
~ProcessCollectorImpl()49 ProcessCollectorImpl::~ProcessCollectorImpl()
50 {
51 if (handle_ != nullptr) {
52 dlclose(handle_);
53 }
54 }
55
Create()56 std::shared_ptr<ProcessCollector> ProcessCollector::Create()
57 {
58 static std::shared_ptr<ProcessCollector> instance_ =
59 std::make_shared<ProcessDecorator>(std::make_shared<ProcessCollectorImpl>());
60 return instance_;
61 }
62
GetMemCgProcesses()63 CollectResult<std::unordered_set<int32_t>> ProcessCollectorImpl::GetMemCgProcesses()
64 {
65 CollectResult<std::unordered_set<int32_t>> result;
66 if (handle_ == nullptr) {
67 return result;
68 }
69
70 using GetMemCgProcesses = bool (*)(std::unordered_set<int32_t>&);
71 GetMemCgProcesses getMemCgProcesses =
72 reinterpret_cast<GetMemCgProcesses>(dlsym(handle_, GET_MEM_CG_PROCESSES_FUNC_NAME.c_str()));
73 if (!getMemCgProcesses) {
74 HIVIEW_LOGW("dlsym failed, %{public}s.", dlerror());
75 return result;
76 }
77
78 std::unordered_set<int32_t> memCgProcs;
79 if (!getMemCgProcesses(memCgProcs)) {
80 result.retCode = UcError::READ_FAILED;
81 return result;
82 }
83 result.data = memCgProcs;
84 result.retCode = UcError::SUCCESS;
85 return result;
86 }
87
IsMemCgProcess(int32_t pid)88 CollectResult<bool> ProcessCollectorImpl::IsMemCgProcess(int32_t pid)
89 {
90 CollectResult<bool> result;
91 auto memCgProcsResult = GetMemCgProcesses();
92 if (memCgProcsResult.retCode != UcError::SUCCESS) {
93 result.retCode = memCgProcsResult.retCode;
94 return result;
95 }
96
97 auto memCgProcs = memCgProcsResult.data;
98 result.data = memCgProcs.find(pid) != memCgProcs.end();
99 result.retCode = UcError::SUCCESS;
100 return result;
101 }
102
ExportMemCgProcesses()103 CollectResult<std::string> ProcessCollectorImpl::ExportMemCgProcesses()
104 {
105 CollectResult<std::string> result;
106 auto memCgProcsResult = GetMemCgProcesses();
107 if (memCgProcsResult.retCode != UcError::SUCCESS) {
108 result.retCode = memCgProcsResult.retCode;
109 return result;
110 }
111
112 std::string filePath;
113 {
114 std::unique_lock<std::mutex> lock(fileMutex_);
115 filePath = CommonUtil::CreateExportFile(PROCESS_COLLECTOT_DIR, MAX_FILE_NUM, PREFIX, SUFFIX);
116 }
117
118 std::ofstream file;
119 file.open(filePath.c_str(), std::ios::out | std::ios::trunc);
120 if (!file.is_open()) {
121 HIVIEW_LOGW("open %{public}s failed.", FileUtil::ExtractFileName(filePath).c_str());
122 result.retCode = UcError::WRITE_FAILED;
123 return result;
124 }
125 for (const auto& proc : memCgProcsResult.data) {
126 file << proc << std::endl;
127 }
128 file.close();
129
130 result.data = filePath;
131 result.retCode = UcError::SUCCESS;
132 return result;
133 }
134 } // UCollectUtil
135 } // HiViewDFX
136 } // OHOS
137