ctoolbox/utilities/

panic_hooks.rs

// Parts used from https://github.com/sfackler/rust-log-panics:
// Copyright (c) 2016 The rust-log-panics Developers
// SPDX-License-Identifier for parts derived from rust-log-panics: (Apache-2.0 OR MIT)

use backtrace::Backtrace;
use std::fmt;

use crate::error;
use crate::utilities::process::ProcessManager;
use crate::utilities::{cleanup_processes, shutdown};

struct Shim(Backtrace);

impl fmt::Debug for Shim {
    fn fmt(&self, fmt: &mut fmt::Formatter) -> fmt::Result {
        if !self.0.frames().is_empty() {
            write!(fmt, "\n{:?}", self.0)
        } else {
            Ok(())
        }
    }
}

pub fn setup_panic_hooks(manager: &ProcessManager) {
    // Custom panic hook to clean up subprocesses, only set for the main process.
    let hook_manager = manager.clone();
    let default_panic_hook = std::panic::take_hook();
    let shutdown_manager = manager.clone();

    std::panic::set_hook(Box::new(move |info| {
        error!(format!("Paniced, trying to get backtrace...",));
        let backtrace = Backtrace::default();

        let thread = std::thread::current();
        let thread = thread.name().unwrap_or("<unnamed>");

        let msg = match info.payload().downcast_ref::<&'static str>() {
            Some(s) => *s,
            None => match info.payload().downcast_ref::<String>() {
                Some(s) => &**s,
                None => "Box<Any>",
            },
        };

        match info.location() {
            Some(location) => {
                error!(format!(
                    "thread '{}' panicked at {}:{}:{} {} with backtrace {:?}",
                    thread,
                    location.file(),
                    location.line(),
                    location.column(),
                    msg,
                    Shim(backtrace)
                ));
            }
            None => {
                error!(format!(
                    "thread '{}' panicked: {} with backtrace {:?}",
                    thread,
                    msg,
                    Shim(backtrace)
                ));
            }
        }

        cleanup_processes(&hook_manager);

        default_panic_hook(info);
    }));

    // FIXME: can't replace handler, see https://github.com/Detegr/rust-ctrlc/issues/106 and https://github.com/Detegr/rust-ctrlc/issues/118
    if let Err(e) = ctrlc::set_handler(move || {
        shutdown(&shutdown_manager);
    }) {
        error!(format!("Failed to set ctrlc handler: {e:?}"));
    }
}

/*

// From rust-log-panics::

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