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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 "src/external/StatsCallbackPuller.h"
#include <aidl/android/os/BnPullAtomCallback.h>
#include <aidl/android/os/IPullAtomResultReceiver.h>
#include <aidl/android/util/StatsEventParcel.h>
#include <android/binder_interface_utils.h>
#include <gmock/gmock.h>
#include <gtest/gtest.h>
#include <stdio.h>
#include <chrono>
#include <thread>
#include <vector>
#include "../metrics/metrics_test_helper.h"
#include "src/stats_log_util.h"
#include "stats_event.h"
#include "tests/statsd_test_util.h"
#ifdef __ANDROID__
namespace android {
namespace os {
namespace statsd {
using namespace testing;
using Status = ::ndk::ScopedAStatus;
using aidl::android::os::BnPullAtomCallback;
using aidl::android::os::IPullAtomResultReceiver;
using aidl::android::util::StatsEventParcel;
using ::ndk::SharedRefBase;
using std::make_shared;
using std::shared_ptr;
using std::vector;
using std::this_thread::sleep_for;
using testing::Contains;
namespace {
int pullTagId = -12;
bool pullSuccess;
vector<int64_t> values;
int64_t pullDelayNs;
int64_t pullTimeoutNs;
int64_t pullCoolDownNs;
std::thread pullThread;
AStatsEvent* createSimpleEvent(int64_t value) {
AStatsEvent* event = AStatsEvent_obtain();
AStatsEvent_setAtomId(event, pullTagId);
AStatsEvent_writeInt64(event, value);
AStatsEvent_build(event);
return event;
}
void executePull(const shared_ptr<IPullAtomResultReceiver>& resultReceiver) {
// Convert stats_events into StatsEventParcels.
vector<StatsEventParcel> parcels;
for (int i = 0; i < values.size(); i++) {
AStatsEvent* event = createSimpleEvent(values[i]);
size_t size;
uint8_t* buffer = AStatsEvent_getBuffer(event, &size);
StatsEventParcel p;
// vector.assign() creates a copy, but this is inevitable unless
// stats_event.h/c uses a vector as opposed to a buffer.
p.buffer.assign(buffer, buffer + size);
parcels.push_back(std::move(p));
AStatsEvent_release(event);
}
sleep_for(std::chrono::nanoseconds(pullDelayNs));
resultReceiver->pullFinished(pullTagId, pullSuccess, parcels);
}
class FakePullAtomCallback : public BnPullAtomCallback {
public:
Status onPullAtom(int atomTag,
const shared_ptr<IPullAtomResultReceiver>& resultReceiver) override {
// Force pull to happen in separate thread to simulate binder.
pullThread = std::thread(executePull, resultReceiver);
return Status::ok();
}
};
class StatsCallbackPullerTest : public ::testing::Test {
public:
StatsCallbackPullerTest() {
}
void SetUp() override {
pullSuccess = false;
pullDelayNs = 0;
values.clear();
pullTimeoutNs = 10000000000LL; // 10 seconds.
pullCoolDownNs = 1000000000; // 1 second.
}
void TearDown() override {
if (pullThread.joinable()) {
pullThread.join();
}
values.clear();
}
};
} // Anonymous namespace.
TEST_F(StatsCallbackPullerTest, PullSuccess) {
shared_ptr<FakePullAtomCallback> cb = SharedRefBase::make<FakePullAtomCallback>();
int64_t value = 43;
pullSuccess = true;
values.push_back(value);
StatsCallbackPuller puller(pullTagId, cb, pullCoolDownNs, pullTimeoutNs, {});
vector<std::shared_ptr<LogEvent>> dataHolder;
int64_t startTimeNs = getElapsedRealtimeNs();
EXPECT_TRUE(puller.PullInternal(&dataHolder));
int64_t endTimeNs = getElapsedRealtimeNs();
ASSERT_EQ(1, dataHolder.size());
EXPECT_EQ(pullTagId, dataHolder[0]->GetTagId());
EXPECT_LT(startTimeNs, dataHolder[0]->GetElapsedTimestampNs());
EXPECT_GT(endTimeNs, dataHolder[0]->GetElapsedTimestampNs());
ASSERT_EQ(1, dataHolder[0]->size());
EXPECT_EQ(value, dataHolder[0]->getValues()[0].mValue.int_value);
}
TEST_F(StatsCallbackPullerTest, PullFail) {
shared_ptr<FakePullAtomCallback> cb = SharedRefBase::make<FakePullAtomCallback>();
pullSuccess = false;
int64_t value = 1234;
values.push_back(value);
StatsCallbackPuller puller(pullTagId, cb, pullCoolDownNs, pullTimeoutNs, {});
vector<shared_ptr<LogEvent>> dataHolder;
EXPECT_FALSE(puller.PullInternal(&dataHolder));
ASSERT_EQ(0, dataHolder.size());
}
TEST_F(StatsCallbackPullerTest, PullTimeout) {
shared_ptr<FakePullAtomCallback> cb = SharedRefBase::make<FakePullAtomCallback>();
pullSuccess = true;
pullDelayNs = MillisToNano(5); // 5ms.
pullTimeoutNs = 10000; // 10 microseconds.
int64_t value = 4321;
values.push_back(value);
StatsCallbackPuller puller(pullTagId, cb, pullCoolDownNs, pullTimeoutNs, {});
vector<shared_ptr<LogEvent>> dataHolder;
int64_t startTimeNs = getElapsedRealtimeNs();
// Returns true to let StatsPuller code evaluate the timeout.
EXPECT_TRUE(puller.PullInternal(&dataHolder));
int64_t endTimeNs = getElapsedRealtimeNs();
int64_t actualPullDurationNs = endTimeNs - startTimeNs;
// Pull should take at least the timeout amount of time, but should stop early because the delay
// is bigger.
EXPECT_LT(pullTimeoutNs, actualPullDurationNs);
EXPECT_GT(pullDelayNs, actualPullDurationNs);
ASSERT_EQ(0, dataHolder.size());
// Let the pull return and make sure that the dataHolder is not modified.
pullThread.join();
ASSERT_EQ(0, dataHolder.size());
}
// Register a puller and ensure that the timeout logic works.
TEST_F(StatsCallbackPullerTest, RegisterAndTimeout) {
shared_ptr<FakePullAtomCallback> cb = SharedRefBase::make<FakePullAtomCallback>();
pullSuccess = true;
pullDelayNs = MillisToNano(5); // 5 ms.
pullTimeoutNs = 10000; // 10 microsseconds.
int64_t value = 4321;
int32_t uid = 123;
values.push_back(value);
sp<StatsPullerManager> pullerManager = new StatsPullerManager();
pullerManager->RegisterPullAtomCallback(uid, pullTagId, pullCoolDownNs, pullTimeoutNs,
vector<int32_t>(), cb);
vector<shared_ptr<LogEvent>> dataHolder;
int64_t startTimeNs = getElapsedRealtimeNs();
// Returns false, since StatsPuller code will evaluate the timeout.
EXPECT_FALSE(pullerManager->Pull(pullTagId, {uid}, startTimeNs, &dataHolder));
int64_t endTimeNs = getElapsedRealtimeNs();
int64_t actualPullDurationNs = endTimeNs - startTimeNs;
// Pull should take at least the timeout amount of time, but should stop early because the delay
// is bigger. Make sure that the time is closer to the timeout, than to the intended delay.
EXPECT_LT(pullTimeoutNs, actualPullDurationNs);
EXPECT_GT(pullDelayNs / 5, actualPullDurationNs);
ASSERT_EQ(0, dataHolder.size());
// Let the pull return and make sure that the dataHolder is not modified.
pullThread.join();
ASSERT_EQ(0, dataHolder.size());
}
} // namespace statsd
} // namespace os
} // namespace android
#else
GTEST_LOG_(INFO) << "This test does nothing.\n";
#endif
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