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/*
* Copyright (C) 2020 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 <stdlib.h>
#include <sys/system_properties.h>
#include <sys/types.h>
#include "perfetto/base/logging.h"
#include "perfetto/tracing/core/data_source_config.h"
#include "src/base/test/test_task_runner.h"
#include "test/cts/utils.h"
#include "test/gtest_and_gmock.h"
#include "test/test_helper.h"
#include "protos/perfetto/config/profiling/perf_event_config.gen.h"
#include "protos/perfetto/trace/profiling/profile_common.gen.h"
#include "protos/perfetto/trace/profiling/profile_packet.gen.h"
#include "protos/perfetto/trace/trace_packet.gen.h"
namespace perfetto {
namespace {
// Skip these tests if the device in question doesn't have the necessary kernel
// LSM hooks in perf_event_open. This comes up when a device with an older
// kernel upgrades to R.
bool HasPerfLsmHooks() {
char buf[PROP_VALUE_MAX + 1] = {};
int ret = __system_property_get("sys.init.perf_lsm_hooks", buf);
PERFETTO_CHECK(ret >= 0);
return std::string(buf) == "1";
}
std::vector<protos::gen::TracePacket> ProfileSystemWide(std::string app_name) {
base::TestTaskRunner task_runner;
// (re)start the target app's main activity
if (IsAppRunning(app_name)) {
StopApp(app_name, "old.app.stopped", &task_runner);
task_runner.RunUntilCheckpoint("old.app.stopped", 1000 /*ms*/);
}
StartAppActivity(app_name, "BusyWaitActivity", "target.app.running",
&task_runner,
/*delay_ms=*/100);
task_runner.RunUntilCheckpoint("target.app.running", 1000 /*ms*/);
// set up tracing
TestHelper helper(&task_runner);
helper.ConnectConsumer();
helper.WaitForConsumerConnect();
TraceConfig trace_config;
trace_config.add_buffers()->set_size_kb(20 * 1024);
trace_config.set_duration_ms(3000);
trace_config.set_data_source_stop_timeout_ms(8000);
auto* ds_config = trace_config.add_data_sources()->mutable_config();
ds_config->set_name("linux.perf");
ds_config->set_target_buffer(0);
protos::gen::PerfEventConfig perf_config;
perf_config.set_all_cpus(true);
perf_config.set_sampling_frequency(10); // Hz
ds_config->set_perf_event_config_raw(perf_config.SerializeAsString());
// start tracing
helper.StartTracing(trace_config);
helper.WaitForTracingDisabled(15000 /*ms*/);
helper.ReadData();
helper.WaitForReadData();
return helper.trace();
}
void AssertHasSampledStacksForPid(std::vector<protos::gen::TracePacket> packets,
int pid) {
uint32_t target_pid = static_cast<uint32_t>(pid);
ASSERT_GT(packets.size(), 0u);
int total_perf_packets = 0;
int lost_records_packets = 0;
int full_samples = 0;
int target_samples = 0;
int target_skipped_samples = 0;
for (const auto& packet : packets) {
if (!packet.has_perf_sample())
continue;
total_perf_packets++;
EXPECT_GT(packet.timestamp(), 0u) << "all packets should have a timestamp";
const auto& sample = packet.perf_sample();
if (sample.has_kernel_records_lost()) {
lost_records_packets++;
continue;
}
if (sample.has_sample_skipped_reason()) {
if (sample.pid() == target_pid)
target_skipped_samples++;
continue;
}
full_samples++;
EXPECT_GT(sample.tid(), 0u);
EXPECT_GT(sample.callstack_iid(), 0u);
if (sample.pid() == target_pid)
target_samples++;
}
EXPECT_GT(target_samples, 0)
<< "target_pid: " << target_pid << ", packets.size(): " << packets.size()
<< ", total_perf_packets: " << total_perf_packets
<< ", full_samples: " << full_samples
<< ", lost_records_packets: " << lost_records_packets
<< ", target_skipped_samples: " << target_skipped_samples << "\n";
}
void AssertNoStacksForPid(std::vector<protos::gen::TracePacket> packets,
int pid) {
uint32_t target_pid = static_cast<uint32_t>(pid);
// The process can still be sampled, but the stacks should be discarded
// without unwinding.
for (const auto& packet : packets) {
if (packet.perf_sample().pid() == target_pid) {
EXPECT_EQ(packet.perf_sample().callstack_iid(), 0u);
EXPECT_TRUE(packet.perf_sample().has_sample_skipped_reason());
}
}
}
TEST(TracedPerfCtsTest, SystemWideDebuggableApp) {
if (!HasPerfLsmHooks())
GTEST_SKIP() << "skipped due to lack of perf_event_open LSM hooks";
std::string app_name = "android.perfetto.cts.app.debuggable";
const auto& packets = ProfileSystemWide(app_name);
int app_pid = PidForProcessName(app_name);
ASSERT_GT(app_pid, 0) << "failed to find pid for target process";
AssertHasSampledStacksForPid(packets, app_pid);
PERFETTO_CHECK(IsAppRunning(app_name));
StopApp(app_name);
}
TEST(TracedPerfCtsTest, SystemWideProfileableApp) {
if (!HasPerfLsmHooks())
GTEST_SKIP() << "skipped due to lack of perf_event_open LSM hooks";
std::string app_name = "android.perfetto.cts.app.profileable";
const auto& packets = ProfileSystemWide(app_name);
int app_pid = PidForProcessName(app_name);
ASSERT_GT(app_pid, 0) << "failed to find pid for target process";
AssertHasSampledStacksForPid(packets, app_pid);
PERFETTO_CHECK(IsAppRunning(app_name));
StopApp(app_name);
}
TEST(TracedPerfCtsTest, SystemWideReleaseApp) {
if (!HasPerfLsmHooks())
GTEST_SKIP() << "skipped due to lack of perf_event_open LSM hooks";
std::string app_name = "android.perfetto.cts.app.release";
const auto& packets = ProfileSystemWide(app_name);
int app_pid = PidForProcessName(app_name);
ASSERT_GT(app_pid, 0) << "failed to find pid for target process";
if (IsDebuggableBuild())
AssertHasSampledStacksForPid(packets, app_pid);
else
AssertNoStacksForPid(packets, app_pid);
PERFETTO_CHECK(IsAppRunning(app_name));
StopApp(app_name);
}
} // namespace
} // namespace perfetto
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