1 /*
2 * Copyright (C) 2019 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 <android/log.h>
18 #include <jni.h>
19 #include <pthread.h>
20 #include <simpleperf.h>
21 #include <unistd.h>
22
23 #include <atomic>
24 #include <string>
25
log(const char * msg)26 static void log(const char* msg) {
27 __android_log_print(ANDROID_LOG_INFO, "simpleperf", "%s", msg);
28 }
29
30 static std::atomic_bool profile_thread_exited(false);
31
ProfileThreadFunc(void *)32 void* ProfileThreadFunc(void*) {
33 pthread_setname_np(pthread_self(), "ProfileThread");
34 simpleperf::RecordOptions options;
35 options.RecordDwarfCallGraph().SetEvent("cpu-clock");
36 simpleperf::ProfileSession session;
37 log("start recording");
38 session.StartRecording(options);
39 for (int i = 0; i < 1; i++) {
40 sleep(1);
41 log("pause recording");
42 session.PauseRecording();
43 sleep(1);
44 log("resume recording");
45 session.ResumeRecording();
46 }
47 sleep(1);
48 log("stop recording");
49 session.StopRecording();
50 log("stop recording successfully");
51 profile_thread_exited = true;
52 return nullptr;
53 };
54
CallFunction(int a)55 int CallFunction(int a) {
56 return a + 1;
57 }
58
59 static std::atomic_int64_t count;
60
BusyThreadFunc(void *)61 void* BusyThreadFunc(void*) {
62 pthread_setname_np(pthread_self(), "BusyThread");
63 count = 0;
64 volatile int i;
65 while (!profile_thread_exited) {
66 for (i = 0; i < 1000000; ) {
67 i = CallFunction(i);
68 }
69 timespec ts;
70 ts.tv_sec = 0;
71 ts.tv_nsec = 1000000;
72 nanosleep(&ts, nullptr);
73 count++;
74 }
75 // Exit after recording. So we can build test apk, and expect profiling data file after app exits.
76 exit(0);
77 return nullptr;
78 }
79
80 extern "C" JNIEXPORT void JNICALL
Java_simpleperf_demo_cpp_1api_MainActivity_runNativeCode(JNIEnv * env,jobject jobj)81 Java_simpleperf_demo_cpp_1api_MainActivity_runNativeCode(
82 JNIEnv *env,
83 jobject jobj) {
84 static bool threadsStarted = false;
85 if (!threadsStarted) {
86 pthread_t profile_thread;
87 if (pthread_create(&profile_thread, nullptr, ProfileThreadFunc, nullptr) != 0) {
88 log("failed to create profile thread");
89 return;
90 }
91 pthread_t busy_thread;
92 if (pthread_create(&busy_thread, nullptr, BusyThreadFunc, nullptr) != 0) {
93 log("failed to create busy thread");
94 }
95 threadsStarted = true;
96 }
97 }
98
99 extern "C" JNIEXPORT jlong JNICALL
Java_simpleperf_demo_cpp_1api_MainActivity_getBusyThreadCount(JNIEnv * env,jobject jobj)100 Java_simpleperf_demo_cpp_1api_MainActivity_getBusyThreadCount(
101 JNIEnv *env,
102 jobject jobj) {
103 return static_cast<jlong>(count);
104 }
105