93 lines
2.5 KiB
Rust
93 lines
2.5 KiB
Rust
// Copyright 2015-2020 Parity Technologies (UK) Ltd.
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// This file is part of OpenEthereum.
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// OpenEthereum is free software: you can redistribute it and/or modify
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// it under the terms of the GNU General Public License as published by
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// the Free Software Foundation, either version 3 of the License, or
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// (at your option) any later version.
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// OpenEthereum is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU General Public License for more details.
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// You should have received a copy of the GNU General Public License
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// along with OpenEthereum. If not, see <http://www.gnu.org/licenses/>.
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//! Custom panic hook with bug report link
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extern crate backtrace;
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use backtrace::Backtrace;
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use std::{
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panic::{self, PanicInfo},
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process, thread,
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};
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/// Set the panic hook to write to stderr and abort the process when a panic happens.
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pub fn set_abort() {
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set_with(|msg| {
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eprintln!("{}", msg);
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process::abort()
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});
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}
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/// Set the panic hook with a closure to be called. The closure receives the panic message.
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///
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/// Depending on how OpenEthereum was compiled, after the closure has been executed, either the process
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/// aborts or unwinding starts.
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///
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/// If you panic within the closure, a double panic happens and the process will stop.
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pub fn set_with<F>(f: F)
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where
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F: Fn(&str) + Send + Sync + 'static,
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{
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panic::set_hook(Box::new(move |info| {
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let msg = gen_panic_msg(info);
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f(&msg);
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}));
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}
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static ABOUT_PANIC: &str = "
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This is a bug. Please report it at:
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https://github.com/openethereum/openethereum/issues/new
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";
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fn gen_panic_msg(info: &PanicInfo) -> String {
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let location = info.location();
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let file = location.as_ref().map(|l| l.file()).unwrap_or("<unknown>");
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let line = location.as_ref().map(|l| l.line()).unwrap_or(0);
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let msg = match info.payload().downcast_ref::<&'static str>() {
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Some(s) => *s,
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None => match info.payload().downcast_ref::<String>() {
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Some(s) => &s[..],
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None => "Box<Any>",
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},
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};
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let thread = thread::current();
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let name = thread.name().unwrap_or("<unnamed>");
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let backtrace = Backtrace::new();
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format!(
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r#"
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====================
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{backtrace:?}
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Thread '{name}' panicked at '{msg}', {file}:{line}
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{about}
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"#,
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backtrace = backtrace,
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name = name,
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msg = msg,
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file = file,
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line = line,
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about = ABOUT_PANIC
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)
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}
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