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/*
* Copyright (C) 2017 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 "InplaceSamplerClient.h"
#include <sys/time.h>
#include <sys/types.h>
#include <stdint.h>
#include <memory>
#include <vector>
#include "environment.h"
#include "utils.h"
static constexpr uint64_t EVENT_ID_FOR_INPLACE_SAMPLER = ULONG_MAX;
std::unique_ptr<InplaceSamplerClient> InplaceSamplerClient::Create(const perf_event_attr& attr,
pid_t pid,
const std::set<pid_t>& tids) {
if (pid == -1) {
LOG(ERROR) << "inplace-sampler can't monitor system wide events.";
return nullptr;
}
std::unique_ptr<InplaceSamplerClient> sampler(new InplaceSamplerClient(attr, pid, tids));
if (!sampler->ConnectServer()) {
return nullptr;
}
if (!sampler->StartProfiling()) {
return nullptr;
}
return sampler;
}
InplaceSamplerClient::InplaceSamplerClient(const perf_event_attr& attr, pid_t pid,
const std::set<pid_t>& tids)
: attr_(attr), pid_(pid), tids_(tids), closed_(false) {
}
uint64_t InplaceSamplerClient::Id() const {
return EVENT_ID_FOR_INPLACE_SAMPLER;
}
bool InplaceSamplerClient::ConnectServer() {
return true;
}
bool InplaceSamplerClient::StartProfiling() {
return true;
}
bool InplaceSamplerClient::StartPolling(IOEventLoop& loop,
const std::function<bool(Record*)>& record_callback,
const std::function<bool()>& close_callback) {
record_callback_ = record_callback;
close_callback_ = close_callback;
auto callback = [this]() {
// Fake records for testing.
uint64_t time = GetSystemClock();
CommRecord comm_r(attr_, pid_, pid_, "fake_comm", Id(), time);
if (!record_callback_(&comm_r)) {
return false;
}
MmapRecord mmap_r(attr_, false, pid_, pid_, 0x1000, 0x1000, 0x0, "fake_elf", Id(), time);
if (!record_callback_(&mmap_r)) {
return false;
}
std::vector<uint64_t> ips(1, 0x1000);
SampleRecord r(attr_, Id(), ips[0], pid_, pid_, time, 0, 1, ips);
if (!record_callback_(&r)) {
return false;
}
closed_ = true;
return close_callback_();
};
timeval duration;
duration.tv_sec = 0;
duration.tv_usec = 1000;
return loop.AddPeriodicEvent(duration, callback);
}
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