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removed panic handlers (#5895)

This commit is contained in:
Arkadiy Paronyan 2017-06-22 19:00:53 +02:00 committed by GitHub
parent dc548315b8
commit 4d5280e43c
12 changed files with 20 additions and 305 deletions
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3
Cargo.toml
View File

@ -95,6 +95,9 @@ secretstore = ["ethcore-secretstore"]
path = "parity/main.rs"
name = "parity"
[profile.debug]
panic = "abort"
[profile.release]
debug = false
lto = false

10
ethcore/src/client/client.rs
View File

@ -141,7 +141,6 @@ pub struct Client {
block_queue: BlockQueue,
report: RwLock<ClientReport>,
import_lock: Mutex<()>,
panic_handler: Arc<PanicHandler>,
verifier: Box<Verifier>,
miner: Arc<Miner>,
sleep_state: Mutex<SleepState>,
@ -213,8 +212,6 @@ impl Client {
let engine = spec.engine.clone();
let block_queue = BlockQueue::new(config.queue.clone(), engine.clone(), message_channel.clone(), config.verifier_type.verifying_seal());
let panic_handler = PanicHandler::new_in_arc();
panic_handler.forward_from(&block_queue);
let awake = match config.mode { Mode::Dark(..) | Mode::Off => false, _ => true };
@ -234,7 +231,6 @@ impl Client {
block_queue: block_queue,
report: RwLock::new(Default::default()),
import_lock: Mutex::new(()),
panic_handler: panic_handler,
miner: miner,
io_channel: Mutex::new(message_channel),
notify: RwLock::new(Vec::new()),
@ -1723,12 +1719,6 @@ impl EngineClient for Client {
}
}
impl MayPanic for Client {
fn on_panic<F>(&self, closure: F) where F: OnPanicListener {
self.panic_handler.on_panic(closure);
}
}
impl ProvingBlockChainClient for Client {
fn prove_storage(&self, key1: H256, key2: H256, id: BlockId) -> Option<(Vec<Bytes>, H256)> {
self.state_at(id)

11
ethcore/src/service.rs
View File

@ -56,7 +56,6 @@ pub struct ClientService {
io_service: Arc<IoService<ClientIoMessage>>,
client: Arc<Client>,
snapshot: Arc<SnapshotService>,
panic_handler: Arc<PanicHandler>,
database: Arc<Database>,
_stop_guard: ::devtools::StopGuard,
}
@ -72,9 +71,7 @@ impl ClientService {
miner: Arc<Miner>,
) -> Result<ClientService, Error>
{
let panic_handler = PanicHandler::new_in_arc();
let io_service = IoService::<ClientIoMessage>::start()?;
panic_handler.forward_from(&io_service);
info!("Configured for {} using {} engine", Colour::White.bold().paint(spec.name.clone()), Colour::Yellow.bold().paint(spec.engine.name()));
@ -109,7 +106,6 @@ impl ClientService {
};
let snapshot = Arc::new(SnapshotService::new(snapshot_params)?);
panic_handler.forward_from(&*client);
let client_io = Arc::new(ClientIoHandler {
client: client.clone(),
snapshot: snapshot.clone(),
@ -125,7 +121,6 @@ impl ClientService {
io_service: Arc::new(io_service),
client: client,
snapshot: snapshot,
panic_handler: panic_handler,
database: db,
_stop_guard: stop_guard,
})
@ -160,12 +155,6 @@ impl ClientService {
pub fn db(&self) -> Arc<KeyValueDB> { self.database.clone() }
}
impl MayPanic for ClientService {
fn on_panic<F>(&self, closure: F) where F: OnPanicListener {
self.panic_handler.on_panic(closure);
}
}
/// IO interface for the Client handler
struct ClientIoHandler {
client: Arc<Client>,

30
ethcore/src/verification/queue/mod.rs
View File

@ -125,7 +125,6 @@ struct Sizes {
/// A queue of items to be verified. Sits between network or other I/O and the `BlockChain`.
/// Keeps them in the same order as inserted, minus invalid items.
pub struct VerificationQueue<K: Kind> {
panic_handler: Arc<PanicHandler>,
engine: Arc<Engine>,
more_to_verify: Arc<SCondvar>,
verification: Arc<Verification<K>>,
@ -221,7 +220,6 @@ impl<K: Kind> VerificationQueue<K> {
message_channel: Mutex::new(message_channel),
});
let empty = Arc::new(SCondvar::new());
let panic_handler = PanicHandler::new_in_arc();
let scale_verifiers = config.verifier_settings.scale_verifiers;
let num_cpus = ::num_cpus::get();
@ -236,7 +234,6 @@ impl<K: Kind> VerificationQueue<K> {
for i in 0..max_verifiers {
debug!(target: "verification", "Adding verification thread #{}", i);
let panic_handler = panic_handler.clone();
let verification = verification.clone();
let engine = engine.clone();
let wait = more_to_verify.clone();
@ -247,17 +244,15 @@ impl<K: Kind> VerificationQueue<K> {
let handle = thread::Builder::new()
.name(format!("Verifier #{}", i))
.spawn(move || {
panic_handler.catch_panic(move || {
VerificationQueue::verify(
verification,
engine,
wait,
ready,
empty,
state,
i,
)
}).unwrap()
VerificationQueue::verify(
verification,
engine,
wait,
ready,
empty,
state,
i,
)
})
.expect("Failed to create verifier thread.");
verifier_handles.push(handle);
@ -265,7 +260,6 @@ impl<K: Kind> VerificationQueue<K> {
VerificationQueue {
engine: engine,
panic_handler: panic_handler,
ready_signal: ready_signal,
more_to_verify: more_to_verify,
verification: verification,
@ -692,12 +686,6 @@ impl<K: Kind> VerificationQueue<K> {
}
}
impl<K: Kind> MayPanic for VerificationQueue<K> {
fn on_panic<F>(&self, closure: F) where F: OnPanicListener {
self.panic_handler.on_panic(closure);
}
}
impl<K: Kind> Drop for VerificationQueue<K> {
fn drop(&mut self) {
trace!(target: "shutdown", "[VerificationQueue] Closing...");

12
parity/blockchain.rs
View File

@ -21,7 +21,6 @@ use std::time::{Instant, Duration};
use std::thread::sleep;
use std::sync::Arc;
use rustc_serialize::hex::FromHex;
use io::{PanicHandler, ForwardPanic};
use util::{ToPretty, U256, H256, Address, Hashable};
use rlp::PayloadInfo;
use ethcore::service::ClientService;
@ -148,9 +147,6 @@ pub fn execute(cmd: BlockchainCmd) -> Result<(), String> {
fn execute_import(cmd: ImportBlockchain) -> Result<(), String> {
let timer = Instant::now();
// Setup panic handler
let panic_handler = PanicHandler::new_in_arc();
// load spec file
let spec = cmd.spec.spec()?;
@ -219,7 +215,6 @@ fn execute_import(cmd: ImportBlockchain) -> Result<(), String> {
// free up the spec in memory.
drop(spec);
panic_handler.forward_from(&service);
let client = service.client();
let mut instream: Box<io::Read> = match cmd.file_path {
@ -390,7 +385,6 @@ fn start_client(
}
fn execute_export(cmd: ExportBlockchain) -> Result<(), String> {
// Setup panic handler
let service = start_client(
cmd.dirs,
cmd.spec,
@ -403,10 +397,8 @@ fn execute_export(cmd: ExportBlockchain) -> Result<(), String> {
cmd.wal,
cmd.cache_config
)?;
let panic_handler = PanicHandler::new_in_arc();
let format = cmd.format.unwrap_or_default();
panic_handler.forward_from(&service);
let client = service.client();
let mut out: Box<io::Write> = match cmd.file_path {
@ -433,7 +425,6 @@ fn execute_export(cmd: ExportBlockchain) -> Result<(), String> {
}
fn execute_export_state(cmd: ExportState) -> Result<(), String> {
// Setup panic handler
let service = start_client(
cmd.dirs,
cmd.spec,
@ -447,9 +438,6 @@ fn execute_export_state(cmd: ExportState) -> Result<(), String> {
cmd.cache_config
)?;
let panic_handler = PanicHandler::new_in_arc();
panic_handler.forward_from(&service);
let client = service.client();
let mut out: Box<io::Write> = match cmd.file_path {

18
parity/run.rs
View File

@ -21,7 +21,6 @@ use fdlimit::raise_fd_limit;
use parity_rpc::{NetworkSettings, informant, is_major_importing};
use ethsync::NetworkConfiguration;
use util::{Colour, version, Mutex, Condvar};
use io::{MayPanic, ForwardPanic, PanicHandler};
use ethcore_logger::{Config as LogConfig, RotatingLogger};
use ethcore::miner::{StratumOptions, Stratum};
use ethcore::client::{Client, Mode, DatabaseCompactionProfile, VMType, BlockChainClient};
@ -168,8 +167,6 @@ fn execute_light(cmd: RunCmd, can_restart: bool, logger: Arc<RotatingLogger>) ->
use ethsync::{LightSyncParams, LightSync, ManageNetwork};
use util::RwLock;
let panic_handler = PanicHandler::new_in_arc();
// load spec
let spec = cmd.spec.spec()?;
@ -332,7 +329,7 @@ fn execute_light(cmd: RunCmd, can_restart: bool, logger: Arc<RotatingLogger>) ->
});
// wait for ctrl-c.
Ok(wait_for_exit(panic_handler, None, None, can_restart))
Ok(wait_for_exit(None, None, can_restart))
}
pub fn execute(cmd: RunCmd, can_restart: bool, logger: Arc<RotatingLogger>) -> Result<(bool, Option<String>), String> {
@ -352,9 +349,6 @@ pub fn execute(cmd: RunCmd, can_restart: bool, logger: Arc<RotatingLogger>) -> R
return execute_light(cmd, can_restart, logger);
}
// set up panic handler
let panic_handler = PanicHandler::new_in_arc();
// load spec
let spec = cmd.spec.spec()?;
@ -517,9 +511,6 @@ pub fn execute(cmd: RunCmd, can_restart: bool, logger: Arc<RotatingLogger>) -> R
// drop the spec to free up genesis state.
drop(spec);
// forward panics from service
panic_handler.forward_from(&service);
// take handle to client
let client = service.client();
let snapshot_service = service.snapshot_service();
@ -731,7 +722,7 @@ pub fn execute(cmd: RunCmd, can_restart: bool, logger: Arc<RotatingLogger>) -> R
}
// Handle exit
let restart = wait_for_exit(panic_handler, Some(updater), Some(client), can_restart);
let restart = wait_for_exit(Some(updater), Some(client), can_restart);
info!("Finishing work, please wait...");
@ -836,7 +827,6 @@ fn build_create_account_hint(spec: &SpecType, keys: &str) -> String {
}
fn wait_for_exit(
panic_handler: Arc<PanicHandler>,
updater: Option<Arc<Updater>>,
client: Option<Arc<Client>>,
can_restart: bool
@ -847,10 +837,6 @@ fn wait_for_exit(
let e = exit.clone();
CtrlC::set_handler(move || { e.1.notify_all(); });
// Handle panics
let e = exit.clone();
panic_handler.on_panic(move |_reason| { e.1.notify_all(); });
if can_restart {
if let Some(updater) = updater {
// Handle updater wanting to restart us

13
parity/snapshot.rs
View File

@ -35,8 +35,6 @@ use dir::Directories;
use user_defaults::UserDefaults;
use fdlimit;
use io::PanicHandler;
/// Kinds of snapshot commands.
#[derive(Debug, PartialEq, Clone, Copy)]
pub enum Kind {
@ -133,10 +131,7 @@ fn restore_using<R: SnapshotReader>(snapshot: Arc<SnapshotService>, reader: &R,
impl SnapshotCommand {
// shared portion of snapshot commands: start the client service
fn start_service(self) -> Result<(ClientService, Arc<PanicHandler>), String> {
// Setup panic handler
let panic_handler = PanicHandler::new_in_arc();
fn start_service(self) -> Result<ClientService, String> {
// load spec file
let spec = self.spec.spec()?;
@ -196,12 +191,12 @@ impl SnapshotCommand {
Arc::new(Miner::with_spec(&spec))
).map_err(|e| format!("Client service error: {:?}", e))?;
Ok((service, panic_handler))
Ok(service)
}
/// restore from a snapshot
pub fn restore(self) -> Result<(), String> {
let file = self.file_path.clone();
let (service, _panic_handler) = self.start_service()?;
let service = self.start_service()?;
warn!("Snapshot restoration is experimental and the format may be subject to change.");
warn!("On encountering an unexpected error, please ensure that you have a recent snapshot.");
@ -236,7 +231,7 @@ impl SnapshotCommand {
let file_path = self.file_path.clone().ok_or("No file path provided.".to_owned())?;
let file_path: PathBuf = file_path.into();
let block_at = self.block_at;
let (service, _panic_handler) = self.start_service()?;
let service = self.start_service()?;
warn!("Snapshots are currently experimental. File formats may be subject to change.");

3
util/io/src/lib.rs
View File

@ -66,7 +66,6 @@ extern crate parking_lot;
mod service;
mod worker;
mod panics;
use mio::{Token};
use mio::deprecated::{EventLoop, NotifyError};
@ -137,7 +136,6 @@ pub use service::IoService;
pub use service::IoChannel;
pub use service::IoManager;
pub use service::TOKENS_PER_HANDLER;
pub use panics::{PanicHandler, MayPanic, OnPanicListener, ForwardPanic};
#[cfg(test)]
mod tests {
@ -171,5 +169,4 @@ mod tests {
let service = IoService::<MyMessage>::start().expect("Error creating network service");
service.register_handler(Arc::new(MyHandler)).unwrap();
}
}

191
util/io/src/panics.rs
View File

@ -1,191 +0,0 @@
// Copyright 2015-2017 Parity Technologies (UK) Ltd.
// This file is part of Parity.
// Parity is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
// Parity is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.
// You should have received a copy of the GNU General Public License
// along with Parity. If not, see <http://www.gnu.org/licenses/>.
//! Panic utilities
use std::thread;
use std::sync::Arc;
use std::default::Default;
use parking_lot::Mutex;
/// Thread-safe closure for handling possible panics
pub trait OnPanicListener: Send + Sync + 'static {
/// Invoke listener
fn call(&mut self, arg: &str);
}
/// Forwards panics from child
pub trait ForwardPanic {
/// Attach `on_panic` listener to `child` and rethrow all panics
fn forward_from<S>(&self, child: &S) where S : MayPanic;
}
/// Trait indicating that the structure catches some of the panics (most probably from spawned threads)
/// and it's possbile to be notified when one of the threads panics.
pub trait MayPanic {
/// `closure` will be invoked whenever panic in thread is caught
fn on_panic<F>(&self, closure: F) where F: OnPanicListener;
}
struct PanicGuard<'a> {
handler: &'a PanicHandler,
}
impl<'a> Drop for PanicGuard<'a> {
fn drop(&mut self) {
if thread::panicking() {
self.handler.notify_all("Panic!".to_owned());
}
}
}
/// Structure that allows to catch panics and notify listeners
pub struct PanicHandler {
listeners: Mutex<Vec<Box<OnPanicListener>>>
}
impl Default for PanicHandler {
fn default() -> Self {
PanicHandler::new()
}
}
impl PanicHandler {
/// Creates new `PanicHandler` wrapped in `Arc`
pub fn new_in_arc() -> Arc<Self> {
Arc::new(Self::new())
}
/// Creates new `PanicHandler`
pub fn new() -> Self {
PanicHandler {
listeners: Mutex::new(vec![])
}
}
/// Invoke closure and catch any possible panics.
/// In case of panic notifies all listeners about it.
#[cfg_attr(feature="dev", allow(deprecated))]
pub fn catch_panic<G, R>(&self, g: G) -> thread::Result<R> where G: FnOnce() -> R + Send + 'static {
let _guard = PanicGuard { handler: self };
let result = g();
Ok(result)
}
/// Notifies all listeners in case there is a panic.
/// You should use `catch_panic` instead of calling this method explicitly.
pub fn notify_all(&self, r: String) {
let mut listeners = self.listeners.lock();
for mut listener in &mut **listeners {
listener.call(&r);
}
}
}
impl MayPanic for PanicHandler {
fn on_panic<F>(&self, closure: F) where F: OnPanicListener {
self.listeners.lock().push(Box::new(closure));
}
}
impl ForwardPanic for Arc<PanicHandler> {
fn forward_from<S>(&self, child: &S) where S : MayPanic {
let p = self.clone();
child.on_panic(move |t| p.notify_all(t));
}
}
impl<F> OnPanicListener for F
where F: FnMut(String) + Send + Sync + 'static {
fn call(&mut self, arg: &str) {
self(arg.to_owned())
}
}
#[test]
#[ignore] // panic forwarding doesnt work on the same thread in beta
fn should_notify_listeners_about_panic () {
use parking_lot::RwLock;
// given
let invocations = Arc::new(RwLock::new(vec![]));
let i = invocations.clone();
let p = PanicHandler::new();
p.on_panic(move |t| i.write().push(t));
// when
p.catch_panic(|| panic!("Panic!")).unwrap_err();
// then
assert!(invocations.read()[0] == "Panic!");
}
#[test]
#[ignore] // panic forwarding doesnt work on the same thread in beta
fn should_notify_listeners_about_panic_when_string_is_dynamic () {
use parking_lot::RwLock;
// given
let invocations = Arc::new(RwLock::new(vec![]));
let i = invocations.clone();
let p = PanicHandler::new();
p.on_panic(move |t| i.write().push(t));
// when
p.catch_panic(|| panic!("Panic: {}", 1)).unwrap_err();
// then
assert!(invocations.read()[0] == "Panic: 1");
}
#[test]
fn should_notify_listeners_about_panic_in_other_thread () {
use std::thread;
use parking_lot::RwLock;
// given
let invocations = Arc::new(RwLock::new(vec![]));
let i = invocations.clone();
let p = PanicHandler::new();
p.on_panic(move |t| i.write().push(t));
// when
let t = thread::spawn(move ||
p.catch_panic(|| panic!("Panic!")).unwrap()
);
t.join().unwrap_err();
// then
assert!(invocations.read()[0] == "Panic!");
}
#[test]
#[ignore] // panic forwarding doesnt work on the same thread in beta
fn should_forward_panics () {
use parking_lot::RwLock;
// given
let invocations = Arc::new(RwLock::new(vec![]));
let i = invocations.clone();
let p = PanicHandler::new_in_arc();
p.on_panic(move |t| i.write().push(t));
let p2 = PanicHandler::new();
p.forward_from(&p2);
// when
p2.catch_panic(|| panic!("Panic!")).unwrap_err();
// then
assert!(invocations.read()[0] == "Panic!");
}

18
util/io/src/service.rs
View File

@ -24,7 +24,6 @@ use crossbeam::sync::chase_lev;
use slab::Slab;
use {IoError, IoHandler};
use worker::{Worker, Work, WorkType};
use panics::*;
use parking_lot::{RwLock, Mutex};
use std::sync::{Condvar as SCondvar, Mutex as SMutex};
use std::time::Duration;
@ -191,7 +190,6 @@ pub struct IoManager<Message> where Message: Send + Sync {
impl<Message> IoManager<Message> where Message: Send + Sync + Clone + 'static {
/// Creates a new instance and registers it with the event loop.
pub fn start(
panic_handler: Arc<PanicHandler>,
event_loop: &mut EventLoop<IoManager<Message>>,
handlers: Arc<RwLock<Slab<Arc<IoHandler<Message>>, HandlerId>>>
) -> Result<(), IoError> {
@ -206,7 +204,6 @@ impl<Message> IoManager<Message> where Message: Send + Sync + Clone + 'static {
IoChannel::new(event_loop.channel(), Arc::downgrade(&handlers)),
work_ready.clone(),
work_ready_mutex.clone(),
panic_handler.clone(),
)
).collect();
@ -417,37 +414,24 @@ impl<Message> IoChannel<Message> where Message: Send + Clone + Sync + 'static {
/// General IO Service. Starts an event loop and dispatches IO requests.
/// 'Message' is a notification message type
pub struct IoService<Message> where Message: Send + Sync + Clone + 'static {
panic_handler: Arc<PanicHandler>,
thread: Mutex<Option<JoinHandle<()>>>,
host_channel: Mutex<Sender<IoMessage<Message>>>,
handlers: Arc<RwLock<Slab<Arc<IoHandler<Message>>, HandlerId>>>,
}
impl<Message> MayPanic for IoService<Message> where Message: Send + Sync + Clone + 'static {
fn on_panic<F>(&self, closure: F) where F: OnPanicListener {
self.panic_handler.on_panic(closure);
}
}
impl<Message> IoService<Message> where Message: Send + Sync + Clone + 'static {
/// Starts IO event loop
pub fn start() -> Result<IoService<Message>, IoError> {
let panic_handler = PanicHandler::new_in_arc();
let mut config = EventLoopBuilder::new();
config.messages_per_tick(1024);
let mut event_loop = config.build().expect("Error creating event loop");
let channel = event_loop.channel();
let panic = panic_handler.clone();
let handlers = Arc::new(RwLock::new(Slab::new(MAX_HANDLERS)));
let h = handlers.clone();
let thread = thread::spawn(move || {
let p = panic.clone();
panic.catch_panic(move || {
IoManager::<Message>::start(p, &mut event_loop, h).expect("Error starting IO service");
}).expect("Error starting panic handler")
IoManager::<Message>::start(&mut event_loop, h).expect("Error starting IO service");
});
Ok(IoService {
panic_handler: panic_handler,
thread: Mutex::new(Some(thread)),
host_channel: Mutex::new(channel),
handlers: handlers,

6
util/io/src/worker.rs
View File

@ -20,7 +20,6 @@ use std::sync::atomic::{AtomicBool, Ordering as AtomicOrdering};
use crossbeam::sync::chase_lev;
use service::{HandlerId, IoChannel, IoContext};
use IoHandler;
use panics::*;
use std::cell::Cell;
use std::sync::{Condvar as SCondvar, Mutex as SMutex};
@ -65,7 +64,6 @@ impl Worker {
channel: IoChannel<Message>,
wait: Arc<SCondvar>,
wait_mutex: Arc<SMutex<()>>,
panic_handler: Arc<PanicHandler>
) -> Worker
where Message: Send + Sync + Clone + 'static {
let deleting = Arc::new(AtomicBool::new(false));
@ -78,9 +76,7 @@ impl Worker {
worker.thread = Some(thread::Builder::new().stack_size(STACK_SIZE).name(format!("IO Worker #{}", index)).spawn(
move || {
LOCAL_STACK_SIZE.with(|val| val.set(STACK_SIZE));
panic_handler.catch_panic(move || {
Worker::work_loop(stealer, channel.clone(), wait, wait_mutex.clone(), deleting)
}).expect("Error starting panic handler")
Worker::work_loop(stealer, channel.clone(), wait, wait_mutex.clone(), deleting)
})
.expect("Error creating worker thread"));
worker

10
util/network/src/service.rs
View File

@ -46,7 +46,6 @@ pub struct NetworkService {
host_info: String,
host: RwLock<Option<Arc<Host>>>,
stats: Arc<NetworkStats>,
panic_handler: Arc<PanicHandler>,
host_handler: Arc<HostHandler>,
config: NetworkConfiguration,
}
@ -55,9 +54,7 @@ impl NetworkService {
/// Starts IO event loop
pub fn new(config: NetworkConfiguration) -> Result<NetworkService, NetworkError> {
let host_handler = Arc::new(HostHandler { public_url: RwLock::new(None) });
let panic_handler = PanicHandler::new_in_arc();
let io_service = IoService::<NetworkIoMessage>::start()?;
panic_handler.forward_from(&io_service);
let stats = Arc::new(NetworkStats::new());
let host_info = Host::client_version();
@ -65,7 +62,6 @@ impl NetworkService {
io_service: io_service,
host_info: host_info,
stats: stats,
panic_handler: panic_handler,
host: RwLock::new(None),
config: config,
host_handler: host_handler,
@ -192,9 +188,3 @@ impl NetworkService {
host.as_ref().map(|ref host| host.with_context_eval(protocol, &io, action))
}
}
impl MayPanic for NetworkService {
fn on_panic<F>(&self, closure: F) where F: OnPanicListener {
self.panic_handler.on_panic(closure);
}
}