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// Copyright 2021 Parity Technologies (UK) Ltd.
// This file is part of Polkadot.
// Polkadot 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.
// Polkadot 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 Polkadot. If not, see <http://www.gnu.org/licenses/>.
use polkadot_node_core_pvf::{Pvf, ValidationHost, start, Config, InvalidCandidate, ValidationError};
use polkadot_parachain::primitives::{BlockData, ValidationParams, ValidationResult};
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use parity_scale_codec::Encode as _;
use async_std::sync::Mutex;
mod adder;
mod worker_common;
const PUPPET_EXE: &str = env!("CARGO_BIN_EXE_puppet_worker");
struct TestHost {
_cache_dir: tempfile::TempDir,
host: Mutex<ValidationHost>,
}
impl TestHost {
fn new() -> Self {
Self::new_with_config(|_| ())
}
fn new_with_config<F>(f: F) -> Self
where
F: FnOnce(&mut Config),
{
let cache_dir = tempfile::tempdir().unwrap();
let program_path = std::path::PathBuf::from(PUPPET_EXE);
let mut config = Config::new(cache_dir.path().to_owned(), program_path);
f(&mut config);
let (host, task) = start(config);
let _ = async_std::task::spawn(task);
Self {
_cache_dir: cache_dir,
host: Mutex::new(host),
}
}
async fn validate_candidate(
&self,
code: &[u8],
params: ValidationParams,
) -> Result<ValidationResult, ValidationError> {
let (result_tx, result_rx) = futures::channel::oneshot::channel();
let code = sp_maybe_compressed_blob::decompress(code, 16 * 1024 * 1024).expect("Compression works");
self.host
.lock()
.await
.execute_pvf(
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params.encode(),
polkadot_node_core_pvf::Priority::Normal,
result_tx,
)
.await
.unwrap();
result_rx.await.unwrap()
}
}
#[async_std::test]
async fn terminates_on_timeout() {
let host = TestHost::new();
let result = host
.validate_candidate(
halt::wasm_binary_unwrap(),
ValidationParams {
block_data: BlockData(Vec::new()),
parent_head: Default::default(),
relay_parent_number: 1,
relay_parent_storage_root: Default::default(),
},
)
.await;
match result {
Err(ValidationError::InvalidCandidate(InvalidCandidate::HardTimeout)) => {}
r => panic!("{:?}", r),
}
}
#[async_std::test]
async fn parallel_execution() {
let host = TestHost::new();
let execute_pvf_future_1 = host.validate_candidate(
halt::wasm_binary_unwrap(),
ValidationParams {
block_data: BlockData(Vec::new()),
parent_head: Default::default(),
relay_parent_number: 1,
relay_parent_storage_root: Default::default(),
},
);
let execute_pvf_future_2 = host.validate_candidate(
halt::wasm_binary_unwrap(),
ValidationParams {
block_data: BlockData(Vec::new()),
parent_head: Default::default(),
relay_parent_number: 1,
relay_parent_storage_root: Default::default(),
},
);
let start = std::time::Instant::now();
let (_, _) = futures::join!(execute_pvf_future_1, execute_pvf_future_2);
// total time should be < 2 x EXECUTION_TIMEOUT_SEC
const EXECUTION_TIMEOUT_SEC: u64 = 3;
assert!(
std::time::Instant::now().duration_since(start)
< std::time::Duration::from_secs(EXECUTION_TIMEOUT_SEC * 2)
);
}
#[async_std::test]
async fn execute_queue_doesnt_stall_if_workers_died() {
let host = TestHost::new_with_config(|cfg| {
assert_eq!(cfg.execute_workers_max_num, 5);
});
// Here we spawn 8 validation jobs for the `halt` PVF and share those between 5 workers. The
// first five jobs should timeout and the workers killed. For the next 3 jobs a new batch of
// workers should be spun up.
futures::future::join_all((0u8..=8).map(|_| {
host.validate_candidate(
halt::wasm_binary_unwrap(),
ValidationParams {
block_data: BlockData(Vec::new()),
parent_head: Default::default(),
relay_parent_number: 1,
relay_parent_storage_root: Default::default(),
},
)
}))
.await;
}