// Copyright (C) 2018 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.
//#undef NDEBUG // get DCHECK etc.
#include "common/debug.h"
#include "common/expected.h"
#include "perfetto/rx_producer.h"
#include <android-base/unique_fd.h>
#include <android-base/parseint.h>
#include <android-base/file.h>
#include "rxcpp/rx.hpp"
#include <iostream>
#include <optional>
#include <sched.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <syscall.h>
#include <fcntl.h>
#include <unistd.h>
using namespace iorap::perfetto; // NOLINT
#if defined(IORAP_PERFETTO_MAIN)
void Usage(char** argv) {
std::cerr << "Usage: " << argv[0] << " [--config-proto=config.pb] [--duration-ms=5000] [--output-proto=output.pb]" << std::endl;
std::cerr << "" << std::endl;
std::cerr << " Request a perfetto trace, blocking until it's complete. The resulting trace proto" << std::endl;
std::cerr << " is output to stdout as text, or to --output-proto as a binary." << std::endl;
std::cerr << "" << std::endl;
std::cerr << " Optional flags:" << std::endl;
std::cerr << " --help,-h Print this Usage." << std::endl;
std::cerr << " --output-proto $,-op $ Perfetto tracebuffer output file (default stdout)." << std::endl;
std::cerr << " --config-proto $,-cp $ Path to binary protobuf config." << std::endl;
std::cerr << " --duration-ms $,-dm $ How long to run trace for in milliseconds." << std::endl;
std::cerr << " --simple Simplest possible perfetto state transitions (default off)." << std::endl;
std::cerr << " --verbose,-v Set verbosity (default off)." << std::endl;
std::cerr << " --wait,-w Wait for key stroke before continuing (default off)." << std::endl;
exit(1);
}
PerfettoDependencies::Component CreateCommandLinePerfettoDependenciesComponent(
uint32_t duration_ms) {
// TODO: read from command line.
static const uint32_t kBufferSize = 4096;
// TODO: remove this hack.
static const uint32_t kTraceDurationMs = duration_ms;
// fruit: using 'bindInstance' causes a segfault every time.
#if 0
// fruit: Can't use a stateful lambda, so use bindInstance instead of registerProvider.
auto config = PerfettoDependencies::CreateConfig(duration_ms,
/*deferred_start*/true,
kBufferSize);
.... bindInstance(config);
#endif
return fruit::createComponent()
.bind<PerfettoConsumer, PerfettoConsumerImpl>()
.registerProvider([]() /* -> TraceConfig */ {
return PerfettoDependencies::CreateConfig(kTraceDurationMs,
/*deferred_start*/true,
kBufferSize);
});
}
static void CollectPerfettoTraceBufferViaAbstractions(
RxProducerFactory& producer_factory,
const std::string& arg_output_proto,
const int arg_duration_ms) {
LOG(VERBOSE) << "CollectPerfettoTraceBufferViaAbstractions";
// Don't create a subscriber to emit the PerfettoStreamCommand.
// RxCpp is "greedy" and consumes every possible item emitted (it doesn't support 'pull'). We want
// to operate on a (command,state) iteration every time, just like in a real scenario.
// Adding the 'interval' turns into a non-greedy version (i.e. push).
// Immediately emit 'kStartTracing', wait and emit kStopTracing, wait and emit kShutdown.
// In reality, there would be a delay between all these events.
auto /*observable<PerfettoStreamCommand>*/ commands =
rxcpp::observable<>::just(PerfettoStreamCommand::kStartTracing)
// wait 1x
.concat(
// Pick a value longer than the perfetto config delay_ms, so that we send
// 'kShutdown' after tracing has already finished.
rxcpp::observable<>::interval(std::chrono::milliseconds(arg_duration_ms * 2))
.take(2) // kStopTracing, kShutdown.
.map([](int value) {
// value is 1,2,3,...
return static_cast<PerfettoStreamCommand>(value); // 1,2, ...
})
);
auto /*observable<PerfettoTraceProto>*/ trace_proto_stream =
producer_factory.CreateTraceStream(commands);
trace_proto_stream
.observe_on(ObserveOnNewIoThread()) // Write data on an idle-class-priority thread.
.as_blocking() // Wait for observable to terminate with on_completed or on_error.
.subscribe(/*on_next*/[arg_output_proto]
(PerfettoTraceProto trace_proto) {
if (!trace_proto.WriteFullyToFile(arg_output_proto)) {
LOG(ERROR) << "Failed to save TraceBuffer to " << arg_output_proto;
} else {
LOG(INFO) << "TraceBuffer saved to file: " << arg_output_proto;
LOG(INFO);
LOG(INFO) << "To print this in a human readable form, execute these commands:";
LOG(INFO) << "$> adb pull '" << arg_output_proto << "'";
LOG(INFO) << "$> trace_to_text systrace <filename.pb>";
}
},
/*on_error*/[](rxcpp::util::error_ptr err) {
LOG(ERROR) << "Perfetto trace proto collection error: " << rxcpp::util::what(err);
});
}
namespace iorap::perfetto {
// Reach inside rx_producer.cc
// Not part of any headers because it's internal.
void CollectPerfettoTraceBufferImmediately(
RxProducerFactory& producer_factory,
const std::string& arg_output_proto);
}
int main(int argc, char** argv) {
android::base::InitLogging(argv);
android::base::SetLogger(android::base::StderrLogger);
bool wait_for_keystroke = false;
bool enable_verbose = false;
std::string arg_output_proto;
std::string arg_config_proto;
uint32_t arg_duration_ms = 1000;
bool arg_simple = false;
if (argc == 1) {
Usage(argv);
}
for (int arg = 1; arg < argc; ++arg) {
std::string argstr = argv[arg];
bool has_arg_next = (arg+1)<argc;
std::string arg_next = has_arg_next ? argv[arg+1] : "";
if (argstr == "--help" || argstr == "-h") {
Usage(argv);
} else if (argstr == "--output-proto" || argstr == "-op") {
if (!has_arg_next) {
std::cerr << "Missing --output-proto <value>" << std::endl;
return 1;
}
arg_output_proto = arg_next;
++arg;
} else if (argstr == "--config-proto" || argstr == "-cp") {
if (!has_arg_next) {
std::cerr << "Missing --config-proto <value>" << std::endl;
return 1;
}
arg_config_proto = arg_next;
LOG(WARNING) << "TODO: parse configs from a file, not implemented yet.";
++arg;
} else if (argstr == "--duration-ms" || argstr == "-dm") {
if (!has_arg_next) {
std::cerr << "Missing --duration-ms <value>" << std::endl;
return 1;
}
if (!android::base::ParseUint(arg_next.c_str(), /*out*/&arg_duration_ms)) {
std::cerr << "Invalid --duration-ms " << arg_next << ", reason: " << strerror(errno);
return 1;
}
++arg;
} else if (argstr == "--simple") {
arg_simple = true;
} else if (argstr == "--verbose" || argstr == "-v") {
enable_verbose = true;
} else if (argstr == "--wait" || argstr == "-w") {
wait_for_keystroke = true;
}
}
if (enable_verbose) {
android::base::SetMinimumLogSeverity(android::base::VERBOSE);
LOG(VERBOSE) << "Verbose check";
LOG(VERBOSE) << "Debug check: " << ::iorap::kIsDebugBuild;
}
// Useful to attach a debugger...
// 1) $> iorap-cmd-perfetto -w <args>
// 2) $> gdbclient <pid>
if (wait_for_keystroke) {
LOG(INFO) << "Self pid: " << getpid();
LOG(INFO) << "Press any key to continue...";
std::cin >> wait_for_keystroke;
}
int return_code = 0;
// TODO: convert #on-error into a non-0 return code.
PerfettoDependencies::Injector injector{
CreateCommandLinePerfettoDependenciesComponent,
arg_duration_ms
};
RxProducerFactory rx_producer_factory{/*borrow*/injector};
if (arg_simple) {
// To debug any kind of low-level perfetto issues.
CollectPerfettoTraceBufferImmediately(/*inout*/rx_producer_factory, arg_output_proto);
} else {
// To debug our own iorap internal abstractions.
CollectPerfettoTraceBufferViaAbstractions(/*inout*/rx_producer_factory,
arg_output_proto,
arg_duration_ms);
}
// Uncomment this if we want to leave the process around to inspect it from adb shell.
// sleep(100000);
// 0 -> successfully wrote the TraceProto out to file.
// 1 -> failed along the way (#on_error and also see the error logs).
return return_code;
}
#endif