forked from denoland/deno
/
worker.rs
503 lines (455 loc) · 13.9 KB
/
worker.rs
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// Copyright 2018-2019 the Deno authors. All rights reserved. MIT license.
use crate::fmt_errors::JSError;
use crate::ops;
use crate::state::ThreadSafeState;
use deno;
use deno::Buf;
use deno::ErrBox;
use deno::ModuleSpecifier;
use deno::RecursiveLoad;
use deno::StartupData;
use futures::channel::mpsc;
use futures::future::FutureExt;
use futures::future::TryFutureExt;
use futures::sink::SinkExt;
use futures::stream::StreamExt;
use std::env;
use std::future::Future;
use std::pin::Pin;
use std::sync::Arc;
use std::sync::Mutex;
use std::task::Context;
use std::task::Poll;
use url::Url;
/// Wraps mpsc channels so they can be referenced
/// from ops and used to facilitate parent-child communication
/// for workers.
pub struct WorkerChannels {
pub sender: mpsc::Sender<Buf>,
pub receiver: mpsc::Receiver<Buf>,
}
/// Wraps deno::Isolate to provide source maps, ops for the CLI, and
/// high-level module loading.
#[derive(Clone)]
pub struct Worker {
pub name: String,
isolate: Arc<Mutex<deno::Isolate>>,
pub state: ThreadSafeState,
external_channels: Arc<Mutex<WorkerChannels>>,
}
impl Worker {
pub fn new(
name: String,
startup_data: StartupData,
state: ThreadSafeState,
external_channels: WorkerChannels,
) -> Self {
let isolate = Arc::new(Mutex::new(deno::Isolate::new(startup_data, false)));
{
let mut i = isolate.lock().unwrap();
ops::compiler::init(&mut i, &state);
ops::errors::init(&mut i, &state);
ops::fetch::init(&mut i, &state);
ops::files::init(&mut i, &state);
ops::fs::init(&mut i, &state);
ops::io::init(&mut i, &state);
ops::net::init(&mut i, &state);
ops::tls::init(&mut i, &state);
ops::os::init(&mut i, &state);
ops::permissions::init(&mut i, &state);
ops::process::init(&mut i, &state);
ops::random::init(&mut i, &state);
ops::repl::init(&mut i, &state);
ops::resources::init(&mut i, &state);
ops::timers::init(&mut i, &state);
ops::workers::init(&mut i, &state);
let state_ = state.clone();
i.set_dyn_import(move |id, specifier, referrer| {
let load_stream = RecursiveLoad::dynamic_import(
id,
specifier,
referrer,
state_.clone(),
state_.modules.clone(),
);
Box::new(load_stream)
});
let global_state_ = state.global_state.clone();
i.set_js_error_create(move |v8_exception| {
JSError::from_v8_exception(v8_exception, &global_state_.ts_compiler)
})
}
Self {
name,
isolate,
state,
external_channels: Arc::new(Mutex::new(external_channels)),
}
}
/// Same as execute2() but the filename defaults to "$CWD/__anonymous__".
pub fn execute(&mut self, js_source: &str) -> Result<(), ErrBox> {
let path = env::current_dir().unwrap().join("__anonymous__");
let url = Url::from_file_path(path).unwrap();
self.execute2(url.as_str(), js_source)
}
/// Executes the provided JavaScript source code. The js_filename argument is
/// provided only for debugging purposes.
pub fn execute2(
&mut self,
js_filename: &str,
js_source: &str,
) -> Result<(), ErrBox> {
let mut isolate = self.isolate.lock().unwrap();
isolate.execute(js_filename, js_source)
}
/// Executes the provided JavaScript module.
pub fn execute_mod_async(
&mut self,
module_specifier: &ModuleSpecifier,
maybe_code: Option<String>,
is_prefetch: bool,
) -> impl Future<Output = Result<(), ErrBox>> {
let worker = self.clone();
let loader = self.state.clone();
let isolate = self.isolate.clone();
let modules = self.state.modules.clone();
let recursive_load = RecursiveLoad::main(
&module_specifier.to_string(),
maybe_code,
loader,
modules,
);
async move {
let id = recursive_load.get_future(isolate).await?;
worker.state.global_state.progress.done();
if !is_prefetch {
let mut isolate = worker.isolate.lock().unwrap();
return isolate.mod_evaluate(id);
}
Ok(())
}
}
/// Post message to worker as a host.
///
/// This method blocks current thread.
pub fn post_message(
self: &Self,
buf: Buf,
) -> impl Future<Output = Result<(), ErrBox>> {
let channels = self.external_channels.lock().unwrap();
let mut sender = channels.sender.clone();
async move {
let result = sender.send(buf).map_err(ErrBox::from).await;
drop(sender);
result
}
}
/// Get message from worker as a host.
pub fn get_message(self: &Self) -> WorkerReceiver {
WorkerReceiver {
channels: self.external_channels.clone(),
}
}
}
impl Future for Worker {
type Output = Result<(), ErrBox>;
fn poll(self: Pin<&mut Self>, cx: &mut Context) -> Poll<Self::Output> {
let inner = self.get_mut();
let mut isolate = inner.isolate.lock().unwrap();
isolate.poll_unpin(cx)
}
}
/// This structure wraps worker's resource id to implement future
/// that will return message received from worker or None
/// if worker's channel has been closed.
pub struct WorkerReceiver {
channels: Arc<Mutex<WorkerChannels>>,
}
impl Future for WorkerReceiver {
type Output = Result<Option<Buf>, ErrBox>;
fn poll(self: Pin<&mut Self>, cx: &mut Context) -> Poll<Self::Output> {
let mut channels = self.channels.lock().unwrap();
match channels.receiver.poll_next_unpin(cx) {
Poll::Ready(v) => Poll::Ready(Ok(v)),
Poll::Pending => Poll::Pending,
}
}
}
#[cfg(test)]
mod tests {
use super::*;
use crate::flags;
use crate::global_state::ThreadSafeGlobalState;
use crate::progress::Progress;
use crate::startup_data;
use crate::state::ThreadSafeState;
use crate::tokio_util;
use futures::executor::block_on;
use std::sync::atomic::Ordering;
pub fn run_in_task<F>(f: F)
where
F: FnOnce() + Send + 'static,
{
let fut = futures::future::lazy(move |_cx| {
f();
Ok(())
});
tokio_util::run(fut)
}
pub fn panic_on_error<I, E, F>(f: F) -> impl Future<Output = Result<I, ()>>
where
F: Future<Output = Result<I, E>>,
E: std::fmt::Debug,
{
f.map_err(|err| panic!("Future got unexpected error: {:?}", err))
}
#[test]
fn execute_mod_esm_imports_a() {
let p = std::path::PathBuf::from(env!("CARGO_MANIFEST_DIR"))
.parent()
.unwrap()
.join("tests/esm_imports_a.js")
.to_owned();
let module_specifier =
ModuleSpecifier::resolve_url_or_path(&p.to_string_lossy()).unwrap();
let global_state = ThreadSafeGlobalState::new(
flags::DenoFlags {
argv: vec![String::from("./deno"), module_specifier.to_string()],
..flags::DenoFlags::default()
},
Progress::new(),
)
.unwrap();
let (int, ext) = ThreadSafeState::create_channels();
let state = ThreadSafeState::new(
global_state,
None,
Some(module_specifier.clone()),
true,
int,
)
.unwrap();
let state_ = state.clone();
tokio_util::run(async move {
let mut worker =
Worker::new("TEST".to_string(), StartupData::None, state, ext);
let result = worker
.execute_mod_async(&module_specifier, None, false)
.await;
if let Err(err) = result {
eprintln!("execute_mod err {:?}", err);
}
panic_on_error(worker).await
});
let metrics = &state_.metrics;
assert_eq!(metrics.resolve_count.load(Ordering::SeqCst), 2);
// Check that we didn't start the compiler.
assert_eq!(metrics.compiler_starts.load(Ordering::SeqCst), 0);
}
#[test]
fn execute_mod_circular() {
let p = std::path::PathBuf::from(env!("CARGO_MANIFEST_DIR"))
.parent()
.unwrap()
.join("tests/circular1.ts")
.to_owned();
let module_specifier =
ModuleSpecifier::resolve_url_or_path(&p.to_string_lossy()).unwrap();
let global_state = ThreadSafeGlobalState::new(
flags::DenoFlags {
argv: vec![String::from("deno"), module_specifier.to_string()],
..flags::DenoFlags::default()
},
Progress::new(),
)
.unwrap();
let (int, ext) = ThreadSafeState::create_channels();
let state = ThreadSafeState::new(
global_state,
None,
Some(module_specifier.clone()),
true,
int,
)
.unwrap();
let state_ = state.clone();
tokio_util::run(async move {
let mut worker =
Worker::new("TEST".to_string(), StartupData::None, state, ext);
let result = worker
.execute_mod_async(&module_specifier, None, false)
.await;
if let Err(err) = result {
eprintln!("execute_mod err {:?}", err);
}
panic_on_error(worker).await
});
let metrics = &state_.metrics;
// TODO assert_eq!(metrics.resolve_count.load(Ordering::SeqCst), 2);
// Check that we didn't start the compiler.
assert_eq!(metrics.compiler_starts.load(Ordering::SeqCst), 0);
}
#[test]
fn execute_006_url_imports() {
let http_server_guard = crate::test_util::http_server();
let p = std::path::PathBuf::from(env!("CARGO_MANIFEST_DIR"))
.parent()
.unwrap()
.join("cli/tests/006_url_imports.ts")
.to_owned();
let module_specifier =
ModuleSpecifier::resolve_url_or_path(&p.to_string_lossy()).unwrap();
let mut flags = flags::DenoFlags::default();
flags.argv = vec![String::from("deno"), module_specifier.to_string()];
flags.reload = true;
let global_state =
ThreadSafeGlobalState::new(flags, Progress::new()).unwrap();
let (int, ext) = ThreadSafeState::create_channels();
let state = ThreadSafeState::new(
global_state.clone(),
None,
Some(module_specifier.clone()),
true,
int,
)
.unwrap();
let global_state_ = global_state.clone();
let state_ = state.clone();
tokio_util::run(async move {
let mut worker = Worker::new(
"TEST".to_string(),
startup_data::deno_isolate_init(),
state,
ext,
);
worker.execute("denoMain()").unwrap();
let result = worker
.execute_mod_async(&module_specifier, None, false)
.await;
if let Err(err) = result {
eprintln!("execute_mod err {:?}", err);
}
panic_on_error(worker).await
});
assert_eq!(state_.metrics.resolve_count.load(Ordering::SeqCst), 3);
// Check that we've only invoked the compiler once.
assert_eq!(
global_state_.metrics.compiler_starts.load(Ordering::SeqCst),
1
);
drop(http_server_guard);
}
fn create_test_worker() -> Worker {
let (int, ext) = ThreadSafeState::create_channels();
let state = ThreadSafeState::mock(
vec![String::from("./deno"), String::from("hello.js")],
int,
);
let mut worker = Worker::new(
"TEST".to_string(),
startup_data::deno_isolate_init(),
state,
ext,
);
worker.execute("denoMain()").unwrap();
worker.execute("workerMain()").unwrap();
worker
}
#[test]
fn test_worker_messages() {
run_in_task(|| {
let mut worker = create_test_worker();
let source = r#"
onmessage = function(e) {
console.log("msg from main script", e.data);
if (e.data == "exit") {
delete window.onmessage;
return;
} else {
console.assert(e.data === "hi");
}
postMessage([1, 2, 3]);
console.log("after postMessage");
}
"#;
worker.execute(source).unwrap();
let worker_ = worker.clone();
let fut = async move {
let r = worker.await;
r.unwrap();
Ok(())
};
tokio::spawn(fut.boxed().compat());
let msg = json!("hi").to_string().into_boxed_str().into_boxed_bytes();
let r = block_on(worker_.post_message(msg));
assert!(r.is_ok());
let maybe_msg = block_on(worker_.get_message()).unwrap();
assert!(maybe_msg.is_some());
// Check if message received is [1, 2, 3] in json
assert_eq!(*maybe_msg.unwrap(), *b"[1,2,3]");
let msg = json!("exit")
.to_string()
.into_boxed_str()
.into_boxed_bytes();
let r = block_on(worker_.post_message(msg));
assert!(r.is_ok());
})
}
#[test]
fn removed_from_resource_table_on_close() {
run_in_task(|| {
let mut worker = create_test_worker();
worker
.execute("onmessage = () => { delete window.onmessage; }")
.unwrap();
let worker_ = worker.clone();
let worker_future = worker
.then(move |r| {
println!("workers.rs after resource close");
r.unwrap();
futures::future::ok(())
})
.shared();
let worker_future_ = worker_future.clone();
tokio::spawn(
worker_future_
.then(|_: Result<(), ()>| futures::future::ok(()))
.compat(),
);
let msg = json!("hi").to_string().into_boxed_str().into_boxed_bytes();
let r = block_on(worker_.post_message(msg));
assert!(r.is_ok());
block_on(worker_future).unwrap();
})
}
#[test]
fn execute_mod_resolve_error() {
run_in_task(|| {
// "foo" is not a valid module specifier so this should return an error.
let mut worker = create_test_worker();
let module_specifier =
ModuleSpecifier::resolve_url_or_path("does-not-exist").unwrap();
let result =
block_on(worker.execute_mod_async(&module_specifier, None, false));
assert!(result.is_err());
})
}
#[test]
fn execute_mod_002_hello() {
run_in_task(|| {
// This assumes cwd is project root (an assumption made throughout the
// tests).
let mut worker = create_test_worker();
let p = std::path::PathBuf::from(env!("CARGO_MANIFEST_DIR"))
.parent()
.unwrap()
.join("tests/002_hello.ts")
.to_owned();
let module_specifier =
ModuleSpecifier::resolve_url_or_path(&p.to_string_lossy()).unwrap();
let result =
block_on(worker.execute_mod_async(&module_specifier, None, false));
assert!(result.is_ok());
})
}
}