reverie/reverie-examples/strace/main.rs

/*
 * Copyright (c) Meta Platforms, Inc. and affiliates.
 * All rights reserved.
 *
 * This source code is licensed under the BSD-style license found in the
 * LICENSE file in the root directory of this source tree.
 */

mod config;
mod filter;
mod global_state;
mod tool;

use clap::Parser;
use config::Config;
use filter::Filter;
use reverie::Error;
use reverie_util::CommonToolArguments;
use tool::Strace;

/// A tool to trace system calls.
#[derive(Parser, Debug)]
struct Opts {
    #[clap(flatten)]
    common: CommonToolArguments,

    /// The set of syscalls to trace. By default, all syscalls are traced. If
    /// this is used, then only the specified syscalls are traced. By limiting
    /// the set of traced syscalls, we can reduce the overhead of the tracer.
    #[clap(long)]
    trace: Vec<Filter>,
}

#[tokio::main]
async fn main() -> Result<(), Error> {
    let args = Opts::from_args();

    let config = Config {
        filters: args.trace,
    };

    let log_guard = args.common.init_tracing();
    let tracer = reverie_ptrace::TracerBuilder::<Strace>::new(args.common.into())
        .config(config)
        .spawn()
        .await?;
    let (status, _) = tracer.wait().await?;
    drop(log_guard); // Flush logs before exiting.
    status.raise_or_exit()
}