1 /*
2 * Copyright (C) 2021-2022 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 #include "executor/memory/parse/parse_vmallocinfo.h"
16 #include <cstdlib>
17 #include <fstream>
18 #include <sstream>
19 #include "executor/memory/memory_util.h"
20 #include "hilog_wrapper.h"
21 #include "util/file_utils.h"
22
23 using namespace std;
24 namespace OHOS {
25 namespace HiviewDFX {
ParseVmallocinfo()26 ParseVmallocinfo::ParseVmallocinfo()
27 {
28 }
29
~ParseVmallocinfo()30 ParseVmallocinfo::~ParseVmallocinfo()
31 {
32 }
33
CaclVmalloclValue(const string & str,uint64_t & totalValue)34 void ParseVmallocinfo::CaclVmalloclValue(const string &str, uint64_t &totalValue)
35 {
36 uint64_t value = 0;
37 istringstream ss(str);
38 string word;
39 vector<string> words;
40 while (ss >> word) {
41 words.push_back(word);
42 }
43 const int base = 10;
44 value = strtoull(words.at(1).c_str(), nullptr, base);
45 totalValue += value;
46 }
47
GetVmallocinfo(uint64_t & value)48 bool ParseVmallocinfo::GetVmallocinfo(uint64_t &value)
49 {
50 value = 0;
51 string path = "/proc/vmallocinfo";
52 bool ret = FileUtils::GetInstance().LoadStringFromProcCb(path, false, true, [&](const string& line) -> void {
53 if (line.find("pages=") != string::npos) {
54 CaclVmalloclValue(line, value);
55 }
56 });
57 return ret;
58 }
59 } // namespace HiviewDFX
60 } // namespace OHOS