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-rw-r--r--cli/inspector.rs952
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diff --git a/cli/inspector.rs b/cli/inspector.rs
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--- a/cli/inspector.rs
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@@ -1,952 +0,0 @@
-// Copyright 2018-2020 the Deno authors. All rights reserved. MIT license.
-
-//! The documentation for the inspector API is sparse, but these are helpful:
-//! https://chromedevtools.github.io/devtools-protocol/
-//! https://hyperandroid.com/2020/02/12/v8-inspector-from-an-embedder-standpoint/
-
-use core::convert::Infallible as Never; // Alias for the future `!` type.
-use deno_core::error::generic_error;
-use deno_core::error::AnyError;
-use deno_core::futures::channel::mpsc;
-use deno_core::futures::channel::mpsc::UnboundedReceiver;
-use deno_core::futures::channel::mpsc::UnboundedSender;
-use deno_core::futures::channel::oneshot;
-use deno_core::futures::future::Future;
-use deno_core::futures::pin_mut;
-use deno_core::futures::prelude::*;
-use deno_core::futures::select;
-use deno_core::futures::stream::FuturesUnordered;
-use deno_core::futures::task;
-use deno_core::futures::task::Context;
-use deno_core::futures::task::Poll;
-use deno_core::serde_json;
-use deno_core::serde_json::json;
-use deno_core::serde_json::Value;
-use deno_core::v8;
-use std::cell::BorrowMutError;
-use std::cell::RefCell;
-use std::collections::HashMap;
-use std::ffi::c_void;
-use std::mem::replace;
-use std::mem::take;
-use std::mem::MaybeUninit;
-use std::net::SocketAddr;
-use std::ops::Deref;
-use std::ops::DerefMut;
-use std::pin::Pin;
-use std::process;
-use std::ptr;
-use std::ptr::NonNull;
-use std::sync::Arc;
-use std::sync::Mutex;
-use std::thread;
-use uuid::Uuid;
-use warp::filters::ws;
-use warp::Filter;
-
-pub struct InspectorServer {
- pub host: SocketAddr,
- register_inspector_tx: UnboundedSender<InspectorInfo>,
- shutdown_server_tx: Option<oneshot::Sender<()>>,
- thread_handle: Option<thread::JoinHandle<()>>,
-}
-
-impl InspectorServer {
- pub fn new(host: SocketAddr, name: String) -> Self {
- let (register_inspector_tx, register_inspector_rx) =
- mpsc::unbounded::<InspectorInfo>();
-
- let (shutdown_server_tx, shutdown_server_rx) = oneshot::channel();
-
- let thread_handle = thread::spawn(move || {
- crate::tokio_util::run_basic(server(
- host,
- register_inspector_rx,
- shutdown_server_rx,
- name,
- ))
- });
-
- Self {
- host,
- register_inspector_tx,
- shutdown_server_tx: Some(shutdown_server_tx),
- thread_handle: Some(thread_handle),
- }
- }
-
- fn register_inspector(&self, info: InspectorInfo) {
- self.register_inspector_tx.unbounded_send(info).unwrap();
- }
-}
-
-impl Drop for InspectorServer {
- fn drop(&mut self) {
- if let Some(shutdown_server_tx) = self.shutdown_server_tx.take() {
- shutdown_server_tx
- .send(())
- .expect("unable to send shutdown signal");
- }
-
- if let Some(thread_handle) = self.thread_handle.take() {
- thread_handle.join().expect("unable to join thread");
- }
- }
-}
-
-/// Inspector information that is sent from the isolate thread to the server
-/// thread when a new inspector is created.
-struct InspectorInfo {
- host: SocketAddr,
- uuid: Uuid,
- thread_name: Option<String>,
- new_websocket_tx: UnboundedSender<WebSocketProxy>,
- canary_rx: oneshot::Receiver<Never>,
-}
-
-impl InspectorInfo {
- fn get_json_metadata(&self) -> Value {
- json!({
- "description": "deno",
- "devtoolsFrontendUrl": self.get_frontend_url(),
- "faviconUrl": "https://deno.land/favicon.ico",
- "id": self.uuid.to_string(),
- "title": self.get_title(),
- "type": "deno",
- // TODO(ry): "url": "file://",
- "webSocketDebuggerUrl": self.get_websocket_debugger_url(),
- })
- }
-
- fn get_websocket_debugger_url(&self) -> String {
- format!("ws://{}/ws/{}", &self.host, &self.uuid)
- }
-
- fn get_frontend_url(&self) -> String {
- format!(
- "devtools://devtools/bundled/inspector.html?v8only=true&ws={}/ws/{}",
- &self.host, &self.uuid
- )
- }
-
- fn get_title(&self) -> String {
- format!(
- "[{}] deno{}",
- process::id(),
- self
- .thread_name
- .as_ref()
- .map(|n| format!(" - {}", n))
- .unwrap_or_default()
- )
- }
-}
-
-async fn server(
- host: SocketAddr,
- register_inspector_rx: UnboundedReceiver<InspectorInfo>,
- shutdown_server_rx: oneshot::Receiver<()>,
- name: String,
-) {
- // TODO: put the `inspector_map` in an `Rc<RefCell<_>>` instead. This is
- // currently not possible because warp requires all filters to implement
- // `Send`, which should not be necessary because we are using the
- // single-threaded Tokio runtime.
- let inspector_map = HashMap::<Uuid, InspectorInfo>::new();
- let inspector_map = Arc::new(Mutex::new(inspector_map));
-
- let inspector_map_ = inspector_map.clone();
- let register_inspector_handler = register_inspector_rx
- .map(|info| {
- eprintln!(
- "Debugger listening on {}",
- info.get_websocket_debugger_url()
- );
- let mut g = inspector_map_.lock().unwrap();
- if g.insert(info.uuid, info).is_some() {
- panic!("Inspector UUID already in map");
- }
- })
- .collect::<()>();
-
- let inspector_map_ = inspector_map_.clone();
- let deregister_inspector_handler = future::poll_fn(|cx| {
- let mut g = inspector_map_.lock().unwrap();
- g.retain(|_, info| info.canary_rx.poll_unpin(cx) == Poll::Pending);
- Poll::<Never>::Pending
- })
- .fuse();
-
- let inspector_map_ = inspector_map.clone();
- let websocket_route = warp::path("ws")
- .and(warp::path::param())
- .and(warp::ws())
- .and_then(move |uuid: String, ws: warp::ws::Ws| {
- future::ready(
- Uuid::parse_str(&uuid)
- .ok()
- .and_then(|uuid| {
- let g = inspector_map_.lock().unwrap();
- g.get(&uuid).map(|info| info.new_websocket_tx.clone()).map(
- |new_websocket_tx| {
- ws.on_upgrade(move |websocket| async move {
- let (proxy, pump) = create_websocket_proxy(websocket);
- let _ = new_websocket_tx.unbounded_send(proxy);
- pump.await;
- })
- },
- )
- })
- .ok_or_else(warp::reject::not_found),
- )
- });
-
- let json_version_response = json!({
- "Browser": name,
- "Protocol-Version": "1.3",
- "V8-Version": deno_core::v8_version(),
- });
- let json_version_route = warp::path!("json" / "version")
- .map(move || warp::reply::json(&json_version_response));
-
- let inspector_map_ = inspector_map.clone();
- let json_list_route = warp::path("json").map(move || {
- let g = inspector_map_.lock().unwrap();
- let json_values = g
- .values()
- .map(|info| info.get_json_metadata())
- .collect::<Vec<_>>();
- warp::reply::json(&json!(json_values))
- });
-
- let server_routes =
- websocket_route.or(json_version_route).or(json_list_route);
- let server_handler = warp::serve(server_routes)
- .try_bind_with_graceful_shutdown(host, async {
- shutdown_server_rx.await.ok();
- })
- .map(|(_, fut)| fut)
- .unwrap_or_else(|err| {
- eprintln!("Cannot start inspector server: {}.", err);
- process::exit(1);
- })
- .fuse();
-
- pin_mut!(register_inspector_handler);
- pin_mut!(deregister_inspector_handler);
- pin_mut!(server_handler);
-
- select! {
- _ = register_inspector_handler => {},
- _ = deregister_inspector_handler => unreachable!(),
- _ = server_handler => {},
- }
-}
-
-type WebSocketProxySender = UnboundedSender<ws::Message>;
-type WebSocketProxyReceiver =
- UnboundedReceiver<Result<ws::Message, warp::Error>>;
-
-/// Encapsulates an UnboundedSender/UnboundedReceiver pair that together form
-/// a duplex channel for sending/receiving websocket messages.
-struct WebSocketProxy {
- tx: WebSocketProxySender,
- rx: WebSocketProxyReceiver,
-}
-
-impl WebSocketProxy {
- pub fn split(self) -> (WebSocketProxySender, WebSocketProxyReceiver) {
- (self.tx, self.rx)
- }
-}
-
-/// Creates a future that proxies messages sent and received on a warp WebSocket
-/// to a UnboundedSender/UnboundedReceiver pair. We need this to sidestep
-/// Tokio's task budget, which causes issues when DenoInspector::poll_sessions()
-/// needs to block the thread because JavaScript execution is paused.
-///
-/// This works because UnboundedSender/UnboundedReceiver are implemented in the
-/// 'futures' crate, therefore they can't participate in Tokio's cooperative
-/// task yielding.
-///
-/// A tuple is returned, where the first element is a duplex channel that can
-/// be used to send/receive messages on the websocket, and the second element
-/// is a future that does the forwarding.
-fn create_websocket_proxy(
- websocket: ws::WebSocket,
-) -> (WebSocketProxy, impl Future<Output = ()> + Send) {
- // The 'outbound' channel carries messages sent to the websocket.
- let (outbound_tx, outbound_rx) = mpsc::unbounded();
-
- // The 'inbound' channel carries messages received from the websocket.
- let (inbound_tx, inbound_rx) = mpsc::unbounded();
-
- let proxy = WebSocketProxy {
- tx: outbound_tx,
- rx: inbound_rx,
- };
-
- // The pump future takes care of forwarding messages between the websocket
- // and channels. It resolves to () when either side disconnects, ignoring any
- // errors.
- let pump = async move {
- let (websocket_tx, websocket_rx) = websocket.split();
-
- let outbound_pump =
- outbound_rx.map(Ok).forward(websocket_tx).map_err(|_| ());
-
- let inbound_pump = websocket_rx
- .map(|msg| inbound_tx.unbounded_send(msg))
- .map_err(|_| ())
- .try_collect::<()>();
-
- let _ = future::try_join(outbound_pump, inbound_pump).await;
- };
-
- (proxy, pump)
-}
-
-#[derive(Clone, Copy)]
-enum PollState {
- Idle,
- Woken,
- Polling,
- Parked,
- Dropped,
-}
-
-pub struct DenoInspector {
- v8_inspector_client: v8::inspector::V8InspectorClientBase,
- v8_inspector: v8::UniqueRef<v8::inspector::V8Inspector>,
- sessions: RefCell<InspectorSessions>,
- flags: RefCell<InspectorFlags>,
- waker: Arc<InspectorWaker>,
- _canary_tx: oneshot::Sender<Never>,
- pub server: Option<Arc<InspectorServer>>,
- pub debugger_url: Option<String>,
-}
-
-impl Deref for DenoInspector {
- type Target = v8::inspector::V8Inspector;
- fn deref(&self) -> &Self::Target {
- &self.v8_inspector
- }
-}
-
-impl DerefMut for DenoInspector {
- fn deref_mut(&mut self) -> &mut Self::Target {
- &mut self.v8_inspector
- }
-}
-
-impl Drop for DenoInspector {
- fn drop(&mut self) {
- // Since the waker is cloneable, it might outlive the inspector itself.
- // Set the poll state to 'dropped' so it doesn't attempt to request an
- // interrupt from the isolate.
- self.waker.update(|w| w.poll_state = PollState::Dropped);
- // V8 automatically deletes all sessions when an Inspector instance is
- // deleted, however InspectorSession also has a drop handler that cleans
- // up after itself. To avoid a double free, make sure the inspector is
- // dropped last.
- take(&mut *self.sessions.borrow_mut());
- }
-}
-
-impl v8::inspector::V8InspectorClientImpl for DenoInspector {
- fn base(&self) -> &v8::inspector::V8InspectorClientBase {
- &self.v8_inspector_client
- }
-
- fn base_mut(&mut self) -> &mut v8::inspector::V8InspectorClientBase {
- &mut self.v8_inspector_client
- }
-
- fn run_message_loop_on_pause(&mut self, context_group_id: i32) {
- assert_eq!(context_group_id, DenoInspectorSession::CONTEXT_GROUP_ID);
- self.flags.borrow_mut().on_pause = true;
- let _ = self.poll_sessions(None);
- }
-
- fn quit_message_loop_on_pause(&mut self) {
- self.flags.borrow_mut().on_pause = false;
- }
-
- fn run_if_waiting_for_debugger(&mut self, context_group_id: i32) {
- assert_eq!(context_group_id, DenoInspectorSession::CONTEXT_GROUP_ID);
- self.flags.borrow_mut().session_handshake_done = true;
- }
-}
-
-/// DenoInspector implements a Future so that it can poll for new incoming
-/// connections and messages from the WebSocket server. The Worker that owns
-/// this DenoInspector will call our poll function from Worker::poll().
-impl Future for DenoInspector {
- type Output = ();
- fn poll(self: Pin<&mut Self>, cx: &mut Context) -> Poll<()> {
- self.poll_sessions(Some(cx)).unwrap()
- }
-}
-
-impl DenoInspector {
- const CONTEXT_GROUP_ID: i32 = 1;
-
- pub fn new(
- js_runtime: &mut deno_core::JsRuntime,
- server: Option<Arc<InspectorServer>>,
- ) -> Box<Self> {
- let context = js_runtime.global_context();
- let scope = &mut v8::HandleScope::new(js_runtime.v8_isolate());
-
- let (new_websocket_tx, new_websocket_rx) =
- mpsc::unbounded::<WebSocketProxy>();
- let (canary_tx, canary_rx) = oneshot::channel::<Never>();
-
- // Create DenoInspector instance.
- let mut self_ = new_box_with(|self_ptr| {
- let v8_inspector_client =
- v8::inspector::V8InspectorClientBase::new::<Self>();
- let v8_inspector =
- v8::inspector::V8Inspector::create(scope, unsafe { &mut *self_ptr });
-
- let sessions = InspectorSessions::new(self_ptr, new_websocket_rx);
- let flags = InspectorFlags::new();
- let waker = InspectorWaker::new(scope.thread_safe_handle());
-
- let debugger_url = if let Some(server) = server.clone() {
- let info = InspectorInfo {
- host: server.host,
- uuid: Uuid::new_v4(),
- thread_name: thread::current().name().map(|n| n.to_owned()),
- new_websocket_tx,
- canary_rx,
- };
-
- let debugger_url = info.get_websocket_debugger_url();
- server.register_inspector(info);
- Some(debugger_url)
- } else {
- None
- };
-
- Self {
- v8_inspector_client,
- v8_inspector,
- sessions,
- flags,
- waker,
- _canary_tx: canary_tx,
- server,
- debugger_url,
- }
- });
-
- // Tell the inspector about the global context.
- let context = v8::Local::new(scope, context);
- let context_name = v8::inspector::StringView::from(&b"global context"[..]);
- self_.context_created(context, Self::CONTEXT_GROUP_ID, context_name);
-
- // Poll the session handler so we will get notified whenever there is
- // new_incoming debugger activity.
- let _ = self_.poll_sessions(None).unwrap();
-
- self_
- }
-
- fn poll_sessions(
- &self,
- mut invoker_cx: Option<&mut Context>,
- ) -> Result<Poll<()>, BorrowMutError> {
- // Short-circuit if there is no server
- if self.server.is_none() {
- return Ok(Poll::Ready(()));
- }
-
- // The futures this function uses do not have re-entrant poll() functions.
- // However it is can happpen that poll_sessions() gets re-entered, e.g.
- // when an interrupt request is honored while the inspector future is polled
- // by the task executor. We let the caller know by returning some error.
- let mut sessions = self.sessions.try_borrow_mut()?;
-
- self.waker.update(|w| {
- match w.poll_state {
- PollState::Idle | PollState::Woken => w.poll_state = PollState::Polling,
- _ => unreachable!(),
- };
- });
-
- // Create a new Context object that will make downstream futures
- // use the InspectorWaker when they are ready to be polled again.
- let waker_ref = task::waker_ref(&self.waker);
- let cx = &mut Context::from_waker(&waker_ref);
-
- loop {
- loop {
- // Do one "handshake" with a newly connected session at a time.
- if let Some(session) = &mut sessions.handshake {
- let poll_result = session.poll_unpin(cx);
- let handshake_done =
- replace(&mut self.flags.borrow_mut().session_handshake_done, false);
- match poll_result {
- Poll::Pending if handshake_done => {
- let session = sessions.handshake.take().unwrap();
- sessions.established.push(session);
- take(&mut self.flags.borrow_mut().waiting_for_session);
- }
- Poll::Ready(_) => sessions.handshake = None,
- Poll::Pending => break,
- };
- }
-
- // Accept new connections.
- match sessions.new_incoming.poll_next_unpin(cx) {
- Poll::Ready(Some(session)) => {
- let prev = sessions.handshake.replace(session);
- assert!(prev.is_none());
- continue;
- }
- Poll::Ready(None) => {}
- Poll::Pending => {}
- }
-
- // Poll established sessions.
- match sessions.established.poll_next_unpin(cx) {
- Poll::Ready(Some(_)) => continue,
- Poll::Ready(None) => break,
- Poll::Pending => break,
- };
- }
-
- let should_block = sessions.handshake.is_some()
- || self.flags.borrow().on_pause
- || self.flags.borrow().waiting_for_session;
-
- let new_state = self.waker.update(|w| {
- match w.poll_state {
- PollState::Woken => {
- // The inspector was woken while the session handler was being
- // polled, so we poll it another time.
- w.poll_state = PollState::Polling;
- }
- PollState::Polling if !should_block => {
- // The session handler doesn't need to be polled any longer, and
- // there's no reason to block (execution is not paused), so this
- // function is about to return.
- w.poll_state = PollState::Idle;
- // Register the task waker that can be used to wake the parent
- // task that will poll the inspector future.
- if let Some(cx) = invoker_cx.take() {
- w.task_waker.replace(cx.waker().clone());
- }
- // Register the address of the inspector, which allows the waker
- // to request an interrupt from the isolate.
- w.inspector_ptr = NonNull::new(self as *const _ as *mut Self);
- }
- PollState::Polling if should_block => {
- // Isolate execution has been paused but there are no more
- // events to process, so this thread will be parked. Therefore,
- // store the current thread handle in the waker so it knows
- // which thread to unpark when new events arrive.
- w.poll_state = PollState::Parked;
- w.parked_thread.replace(thread::current());
- }
- _ => unreachable!(),
- };
- w.poll_state
- });
- match new_state {
- PollState::Idle => break Ok(Poll::Pending), // Yield to task.
- PollState::Polling => {} // Poll the session handler again.
- PollState::Parked => thread::park(), // Park the thread.
- _ => unreachable!(),
- };
- }
- }
-
- /// This function blocks the thread until at least one inspector client has
- /// established a websocket connection and successfully completed the
- /// handshake. After that, it instructs V8 to pause at the next statement.
- pub fn wait_for_session_and_break_on_next_statement(&mut self) {
- loop {
- match self.sessions.get_mut().established.iter_mut().next() {
- Some(session) => break session.break_on_next_statement(),
- None => {
- self.flags.get_mut().waiting_for_session = true;
- let _ = self.poll_sessions(None).unwrap();
- }
- };
- }
- }
-}
-
-#[derive(Default)]
-struct InspectorFlags {
- waiting_for_session: bool,
- session_handshake_done: bool,
- on_pause: bool,
-}
-
-impl InspectorFlags {
- fn new() -> RefCell<Self> {
- let self_ = Self::default();
- RefCell::new(self_)
- }
-}
-
-struct InspectorSessions {
- new_incoming:
- Pin<Box<dyn Stream<Item = Box<DenoInspectorSession>> + 'static>>,
- handshake: Option<Box<DenoInspectorSession>>,
- established: FuturesUnordered<Box<DenoInspectorSession>>,
-}
-
-impl InspectorSessions {
- fn new(
- inspector_ptr: *mut DenoInspector,
- new_websocket_rx: UnboundedReceiver<WebSocketProxy>,
- ) -> RefCell<Self> {
- let new_incoming = new_websocket_rx
- .map(move |websocket| DenoInspectorSession::new(inspector_ptr, websocket))
- .boxed_local();
- let self_ = Self {
- new_incoming,
- ..Default::default()
- };
- RefCell::new(self_)
- }
-}
-
-impl Default for InspectorSessions {
- fn default() -> Self {
- Self {
- new_incoming: stream::empty().boxed_local(),
- handshake: None,
- established: FuturesUnordered::new(),
- }
- }
-}
-
-struct InspectorWakerInner {
- poll_state: PollState,
- task_waker: Option<task::Waker>,
- parked_thread: Option<thread::Thread>,
- inspector_ptr: Option<NonNull<DenoInspector>>,
- isolate_handle: v8::IsolateHandle,
-}
-
-unsafe impl Send for InspectorWakerInner {}
-
-struct InspectorWaker(Mutex<InspectorWakerInner>);
-
-impl InspectorWaker {
- fn new(isolate_handle: v8::IsolateHandle) -> Arc<Self> {
- let inner = InspectorWakerInner {
- poll_state: PollState::Idle,
- task_waker: None,
- parked_thread: None,
- inspector_ptr: None,
- isolate_handle,
- };
- Arc::new(Self(Mutex::new(inner)))
- }
-
- fn update<F, R>(&self, update_fn: F) -> R
- where
- F: FnOnce(&mut InspectorWakerInner) -> R,
- {
- let mut g = self.0.lock().unwrap();
- update_fn(&mut g)
- }
-}
-
-impl task::ArcWake for InspectorWaker {
- fn wake_by_ref(arc_self: &Arc<Self>) {
- arc_self.update(|w| {
- match w.poll_state {
- PollState::Idle => {
- // Wake the task, if any, that has polled the Inspector future last.
- if let Some(waker) = w.task_waker.take() {
- waker.wake()
- }
- // Request an interrupt from the isolate if it's running and there's
- // not unhandled interrupt request in flight.
- if let Some(arg) = w
- .inspector_ptr
- .take()
- .map(|ptr| ptr.as_ptr() as *mut c_void)
- {
- w.isolate_handle.request_interrupt(handle_interrupt, arg);
- }
- extern "C" fn handle_interrupt(
- _isolate: &mut v8::Isolate,
- arg: *mut c_void,
- ) {
- let inspector = unsafe { &*(arg as *mut DenoInspector) };
- let _ = inspector.poll_sessions(None);
- }
- }
- PollState::Parked => {
- // Unpark the isolate thread.
- let parked_thread = w.parked_thread.take().unwrap();
- assert_ne!(parked_thread.id(), thread::current().id());
- parked_thread.unpark();
- }
- _ => {}
- };
- w.poll_state = PollState::Woken;
- });
- }
-}
-
-struct DenoInspectorSession {
- v8_channel: v8::inspector::ChannelBase,
- v8_session: v8::UniqueRef<v8::inspector::V8InspectorSession>,
- websocket_tx: WebSocketProxySender,
- websocket_rx_handler: Pin<Box<dyn Future<Output = ()> + 'static>>,
-}
-
-impl Deref for DenoInspectorSession {
- type Target = v8::inspector::V8InspectorSession;
- fn deref(&self) -> &Self::Target {
- &self.v8_session
- }
-}
-
-impl DerefMut for DenoInspectorSession {
- fn deref_mut(&mut self) -> &mut Self::Target {
- &mut self.v8_session
- }
-}
-
-impl DenoInspectorSession {
- const CONTEXT_GROUP_ID: i32 = 1;
-
- pub fn new(
- inspector_ptr: *mut DenoInspector,
- websocket: WebSocketProxy,
- ) -> Box<Self> {
- new_box_with(move |self_ptr| {
- let v8_channel = v8::inspector::ChannelBase::new::<Self>();
- let v8_session = unsafe { &mut *inspector_ptr }.connect(
- Self::CONTEXT_GROUP_ID,
- // Todo(piscisaureus): V8Inspector::connect() should require that
- // the 'v8_channel' argument cannot move.
- unsafe { &mut *self_ptr },
- v8::inspector::StringView::empty(),
- );
-
- let (websocket_tx, websocket_rx) = websocket.split();
- let websocket_rx_handler =
- Self::receive_from_websocket(self_ptr, websocket_rx);
-
- Self {
- v8_channel,
- v8_session,
- websocket_tx,
- websocket_rx_handler,
- }
- })
- }
-
- /// Returns a future that receives messages from the websocket and dispatches
- /// them to the V8 session.
- fn receive_from_websocket(
- self_ptr: *mut Self,
- websocket_rx: WebSocketProxyReceiver,
- ) -> Pin<Box<dyn Future<Output = ()> + 'static>> {
- async move {
- eprintln!("Debugger session started.");
-
- let result = websocket_rx
- .map_ok(move |msg| {
- let msg = msg.as_bytes();
- let msg = v8::inspector::StringView::from(msg);
- unsafe { &mut *self_ptr }.dispatch_protocol_message(msg);
- })
- .try_collect::<()>()
- .await;
-
- match result {
- Ok(_) => eprintln!("Debugger session ended."),
- Err(err) => eprintln!("Debugger session ended: {}.", err),
- };
- }
- .boxed_local()
- }
-
- fn send_to_websocket(&self, msg: v8::UniquePtr<v8::inspector::StringBuffer>) {
- let msg = msg.unwrap().string().to_string();
- let msg = ws::Message::text(msg);
- let _ = self.websocket_tx.unbounded_send(msg);
- }
-
- pub fn break_on_next_statement(&mut self) {
- let reason = v8::inspector::StringView::from(&b"debugCommand"[..]);
- let detail = v8::inspector::StringView::empty();
- self.schedule_pause_on_next_statement(reason, detail);
- }
-}
-
-impl v8::inspector::ChannelImpl for DenoInspectorSession {
- fn base(&self) -> &v8::inspector::ChannelBase {
- &self.v8_channel
- }
-
- fn base_mut(&mut self) -> &mut v8::inspector::ChannelBase {
- &mut self.v8_channel
- }
-
- fn send_response(
- &mut self,
- _call_id: i32,
- message: v8::UniquePtr<v8::inspector::StringBuffer>,
- ) {
- self.send_to_websocket(message);
- }
-
- fn send_notification(
- &mut self,
- message: v8::UniquePtr<v8::inspector::StringBuffer>,
- ) {
- self.send_to_websocket(message);
- }
-
- fn flush_protocol_notifications(&mut self) {}
-}
-
-impl Future for DenoInspectorSession {
- type Output = ();
- fn poll(mut self: Pin<&mut Self>, cx: &mut Context) -> Poll<Self::Output> {
- self.websocket_rx_handler.poll_unpin(cx)
- }
-}
-
-/// A local inspector session that can be used to send and receive protocol messages directly on
-/// the same thread as an isolate.
-pub struct InspectorSession {
- v8_channel: v8::inspector::ChannelBase,
- v8_session: v8::UniqueRef<v8::inspector::V8InspectorSession>,
- response_tx_map: HashMap<i32, oneshot::Sender<serde_json::Value>>,
- next_message_id: i32,
- notification_queue: Vec<Value>,
-}
-
-impl Deref for InspectorSession {
- type Target = v8::inspector::V8InspectorSession;
- fn deref(&self) -> &Self::Target {
- &self.v8_session
- }
-}
-
-impl DerefMut for InspectorSession {
- fn deref_mut(&mut self) -> &mut Self::Target {
- &mut self.v8_session
- }
-}
-
-impl v8::inspector::ChannelImpl for InspectorSession {
- fn base(&self) -> &v8::inspector::ChannelBase {
- &self.v8_channel
- }
-
- fn base_mut(&mut self) -> &mut v8::inspector::ChannelBase {
- &mut self.v8_channel
- }
-
- fn send_response(
- &mut self,
- call_id: i32,
- message: v8::UniquePtr<v8::inspector::StringBuffer>,
- ) {
- let raw_message = message.unwrap().string().to_string();
- let message = serde_json::from_str(&raw_message).unwrap();
-
- self
- .response_tx_map
- .remove(&call_id)
- .unwrap()
- .send(message)
- .unwrap();
- }
-
- fn send_notification(
- &mut self,
- message: v8::UniquePtr<v8::inspector::StringBuffer>,
- ) {
- let raw_message = message.unwrap().string().to_string();
- let message = serde_json::from_str(&raw_message).unwrap();
-
- self.notification_queue.push(message);
- }
-
- fn flush_protocol_notifications(&mut self) {}
-}
-
-impl InspectorSession {
- const CONTEXT_GROUP_ID: i32 = 1;
-
- pub fn new(inspector_ptr: *mut DenoInspector) -> Box<Self> {
- new_box_with(move |self_ptr| {
- let v8_channel = v8::inspector::ChannelBase::new::<Self>();
- let v8_session = unsafe { &mut *inspector_ptr }.connect(
- Self::CONTEXT_GROUP_ID,
- unsafe { &mut *self_ptr },
- v8::inspector::StringView::empty(),
- );
-
- let response_tx_map = HashMap::new();
- let next_message_id = 0;
-
- let notification_queue = Vec::new();
-
- Self {
- v8_channel,
- v8_session,
- response_tx_map,
- next_message_id,
- notification_queue,
- }
- })
- }
-
- pub fn notifications(&mut self) -> Vec<Value> {
- self.notification_queue.split_off(0)
- }
-
- pub async fn post_message(
- &mut self,
- method: &str,
- params: Option<serde_json::Value>,
- ) -> Result<serde_json::Value, AnyError> {
- let id = self.next_message_id;
- self.next_message_id += 1;
-
- let (response_tx, response_rx) = oneshot::channel::<serde_json::Value>();
- self.response_tx_map.insert(id, response_tx);
-
- let message = json!({
- "id": id,
- "method": method,
- "params": params,
- });
-
- let raw_message = serde_json::to_string(&message).unwrap();
- let raw_message = v8::inspector::StringView::from(raw_message.as_bytes());
- self.v8_session.dispatch_protocol_message(raw_message);
-
- let response = response_rx.await.unwrap();
- if let Some(error) = response.get("error") {
- return Err(generic_error(error.to_string()));
- }
-
- let result = response.get("result").unwrap().clone();
- Ok(result)
- }
-}
-
-fn new_box_with<T>(new_fn: impl FnOnce(*mut T) -> T) -> Box<T> {
- let b = Box::new(MaybeUninit::<T>::uninit());
- let p = Box::into_raw(b) as *mut T;
- unsafe { ptr::write(p, new_fn(p)) };
- unsafe { Box::from_raw(p) }
-}
generated by cgit v1.2.3 (git 2.25.1) at 2025-06-27 08:39:21 +0000