1 /*
2 * Copyright (C) 2021 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 "binder_catcher.h"
16
17 #include <fstream>
18
19 #include "securec.h"
20
21 #include "common_utils.h"
22 #include "defines.h"
23 namespace OHOS {
24 namespace HiviewDFX {
25 using namespace OHOS::HiviewDFX::CommonUtils;
BinderCatcher()26 BinderCatcher::BinderCatcher() : EventLogCatcher()
27 {
28 name_ = "BinderCatcher";
29 }
30
Initialize(const std::string & strParam1,int intParam1,int intParam2)31 bool BinderCatcher::Initialize(const std::string& strParam1, int intParam1, int intParam2)
32 {
33 // this catcher do not need parameters, just return true
34 char buf[BUF_SIZE_512] = {0};
35 int ret = snprintf_s(buf, BUF_SIZE_512, BUF_SIZE_512 - 1,
36 "BinderCatcher --\n");
37 if (ret > 0) {
38 description_ = buf;
39 }
40 return true;
41 };
42
Catch(int fd)43 int BinderCatcher::Catch(int fd)
44 {
45 std::string line;
46 int originSize = GetFdSize(fd);
47 std::ifstream fin;
48 fin.open("/proc/transaction_proc");
49 if (!fin.is_open()) {
50 std::string content = "open binder file failed :/proc/transaction_proc\r\n";
51 FileUtil::SaveStringToFd(fd, content);
52 goto end;
53 }
54 while (getline(fin, line)) {
55 FileUtil::SaveStringToFd(fd, line + "\n");
56 }
57 fin.close();
58
59 end:
60 logSize_ = GetFdSize(fd) - originSize;
61 if (logSize_ <= 0) {
62 FileUtil::SaveStringToFd(fd, "binder content is empty!");
63 }
64 return logSize_;
65 };
66 } // namespace HiviewDFX
67 } // namespace OHOS
68