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/*
* Copyright (C) 2019 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#include <android/log.h>
#include <jni.h>
#include <pthread.h>
#include <simpleperf.h>
#include <unistd.h>
#include <atomic>
#include <string>
static void log(const char* msg) {
__android_log_print(ANDROID_LOG_INFO, "simpleperf", "%s", msg);
}
static std::atomic_bool profile_thread_exited(false);
void* ProfileThreadFunc(void*) {
pthread_setname_np(pthread_self(), "ProfileThread");
simpleperf::RecordOptions options;
options.RecordDwarfCallGraph();
simpleperf::ProfileSession session;
log("start recording");
session.StartRecording(options);
for (int i = 0; i < 3; i++) {
sleep(1);
log("pause recording");
session.PauseRecording();
sleep(1);
log("resume recording");
session.ResumeRecording();
}
sleep(1);
log("stop recording");
session.StopRecording();
log("stop recording successfully");
profile_thread_exited = true;
return nullptr;
};
int CallFunction(int a) {
return a + 1;
}
static std::atomic_int64_t count;
void* BusyThreadFunc(void*) {
pthread_setname_np(pthread_self(), "BusyThread");
count = 0;
volatile int i;
while (!profile_thread_exited) {
for (i = 0; i < 1000000; ) {
i = CallFunction(i);
}
timespec ts;
ts.tv_sec = 0;
ts.tv_nsec = 1000000;
nanosleep(&ts, nullptr);
count++;
}
return nullptr;
}
extern "C" JNIEXPORT void JNICALL
Java_simpleperf_demo_cpp_1api_MainActivity_runNativeCode(
JNIEnv *env,
jobject jobj) {
static bool threadsStarted = false;
if (!threadsStarted) {
pthread_t profile_thread;
if (pthread_create(&profile_thread, nullptr, ProfileThreadFunc, nullptr) != 0) {
log("failed to create profile thread");
return;
}
pthread_t busy_thread;
if (pthread_create(&busy_thread, nullptr, BusyThreadFunc, nullptr) != 0) {
log("failed to create busy thread");
}
threadsStarted = true;
}
}
extern "C" JNIEXPORT jlong JNICALL
Java_simpleperf_demo_cpp_1api_MainActivity_getBusyThreadCount(
JNIEnv *env,
jobject jobj) {
return static_cast<jlong>(count);
}
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