1 /*
2 * Copyright (C) 2018 The Android Open Source Project
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 * http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
17 #include "llkd.h"
18
19 #include <sched.h>
20 #include <sys/prctl.h>
21 #include <unistd.h>
22
23 #include <chrono>
24
25 #include <android-base/logging.h>
26
27 using namespace std::chrono;
28
main(int,char **)29 int main(int, char**) {
30 prctl(PR_SET_DUMPABLE, 0);
31
32 LOG(INFO) << "started";
33
34 bool enabled = llkInit();
35
36 // Would like this policy to be automatic as part of libllkd,
37 // but that would be presumptuous and bad side-effect.
38 struct sched_param param;
39 memset(¶m, 0, sizeof(param));
40 sched_setscheduler(0, SCHED_BATCH, ¶m);
41
42 while (true) {
43 if (enabled) {
44 ::usleep(duration_cast<microseconds>(llkCheck()).count());
45 } else {
46 ::pause();
47 }
48 }
49 // NOTREACHED
50
51 LOG(INFO) << "exiting";
52 return 0;
53 }
54