mirror of
https://github.com/denoland/deno.git
synced 2024-11-26 16:09:27 -05:00
755 lines
24 KiB
Rust
755 lines
24 KiB
Rust
// Copyright 2018-2021 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 crate::error::generic_error;
|
|
use crate::error::AnyError;
|
|
use crate::futures::channel::mpsc;
|
|
use crate::futures::channel::mpsc::UnboundedReceiver;
|
|
use crate::futures::channel::mpsc::UnboundedSender;
|
|
use crate::futures::channel::oneshot;
|
|
use crate::futures::future::select;
|
|
use crate::futures::future::Either;
|
|
use crate::futures::future::Future;
|
|
use crate::futures::prelude::*;
|
|
use crate::futures::stream::FuturesUnordered;
|
|
use crate::futures::stream::StreamExt;
|
|
use crate::futures::task;
|
|
use crate::futures::task::Context;
|
|
use crate::futures::task::Poll;
|
|
use crate::serde_json;
|
|
use crate::serde_json::json;
|
|
use crate::serde_json::Value;
|
|
use crate::v8;
|
|
use parking_lot::Mutex;
|
|
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::pin::Pin;
|
|
use std::ptr;
|
|
use std::ptr::NonNull;
|
|
use std::rc::Rc;
|
|
use std::sync::Arc;
|
|
use std::thread;
|
|
|
|
/// If first argument is `None` then it's a notification, otherwise
|
|
/// it's a message.
|
|
pub type SessionProxySender = UnboundedSender<(Option<i32>, String)>;
|
|
// TODO(bartlomieju): does it even need to send a Result?
|
|
// It seems `Vec<u8>` would be enough
|
|
pub type SessionProxyReceiver = UnboundedReceiver<Result<Vec<u8>, AnyError>>;
|
|
|
|
/// Encapsulates an UnboundedSender/UnboundedReceiver pair that together form
|
|
/// a duplex channel for sending/receiving messages in V8 session.
|
|
pub struct InspectorSessionProxy {
|
|
pub tx: SessionProxySender,
|
|
pub rx: SessionProxyReceiver,
|
|
}
|
|
|
|
impl InspectorSessionProxy {
|
|
pub fn split(self) -> (SessionProxySender, SessionProxyReceiver) {
|
|
(self.tx, self.rx)
|
|
}
|
|
}
|
|
|
|
#[derive(Clone, Copy)]
|
|
enum PollState {
|
|
Idle,
|
|
Woken,
|
|
Polling,
|
|
Parked,
|
|
Dropped,
|
|
}
|
|
|
|
/// This structure is used responsible for providing inspector interface
|
|
/// to the `JsRuntime`.
|
|
///
|
|
/// It stores an instance of `v8::inspector::V8Inspector` and additionally
|
|
/// implements `v8::inspector::V8InspectorClientImpl`.
|
|
///
|
|
/// After creating this structure it's possible to connect multiple sessions
|
|
/// to the inspector, in case of Deno it's either: a "websocket session" that
|
|
/// provides integration with Chrome Devtools, or an "in-memory session" that
|
|
/// is used for REPL or converage collection.
|
|
pub struct JsRuntimeInspector {
|
|
v8_inspector_client: v8::inspector::V8InspectorClientBase,
|
|
v8_inspector: Rc<RefCell<v8::UniquePtr<v8::inspector::V8Inspector>>>,
|
|
new_session_tx: UnboundedSender<InspectorSessionProxy>,
|
|
sessions: RefCell<SessionContainer>,
|
|
flags: RefCell<InspectorFlags>,
|
|
waker: Arc<InspectorWaker>,
|
|
deregister_tx: Option<oneshot::Sender<()>>,
|
|
}
|
|
|
|
impl Drop for JsRuntimeInspector {
|
|
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);
|
|
// TODO(bartlomieju): this comment is out of date
|
|
// V8 automatically deletes all sessions when an `V8Inspector` 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());
|
|
|
|
// Notify counterparty that this instance is being destroyed. Ignoring
|
|
// result because counterparty waiting for the signal might have already
|
|
// dropped the other end of channel.
|
|
if let Some(deregister_tx) = self.deregister_tx.take() {
|
|
let _ = deregister_tx.send(());
|
|
}
|
|
}
|
|
}
|
|
|
|
impl v8::inspector::V8InspectorClientImpl for JsRuntimeInspector {
|
|
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, JsRuntimeInspector::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, JsRuntimeInspector::CONTEXT_GROUP_ID);
|
|
self.flags.borrow_mut().session_handshake_done = true;
|
|
}
|
|
}
|
|
|
|
/// `JsRuntimeInspector` implements a Future so that it can poll for new incoming
|
|
/// connections and messages from the WebSocket server. The Worker that owns
|
|
/// this `JsRuntimeInspector` will call this function from `Worker::poll()`.
|
|
impl Future for JsRuntimeInspector {
|
|
type Output = ();
|
|
fn poll(self: Pin<&mut Self>, cx: &mut Context) -> Poll<()> {
|
|
self.poll_sessions(Some(cx)).unwrap()
|
|
}
|
|
}
|
|
|
|
impl JsRuntimeInspector {
|
|
/// Currently Deno supports only a single context in `JsRuntime`
|
|
/// and thus it's id is provided as an associated contant.
|
|
const CONTEXT_GROUP_ID: i32 = 1;
|
|
|
|
pub fn new(
|
|
isolate: &mut v8::OwnedIsolate,
|
|
context: v8::Global<v8::Context>,
|
|
) -> Box<Self> {
|
|
let scope = &mut v8::HandleScope::new(isolate);
|
|
|
|
let (new_session_tx, new_session_rx) =
|
|
mpsc::unbounded::<InspectorSessionProxy>();
|
|
|
|
let v8_inspector_client =
|
|
v8::inspector::V8InspectorClientBase::new::<Self>();
|
|
|
|
let flags = InspectorFlags::new();
|
|
let waker = InspectorWaker::new(scope.thread_safe_handle());
|
|
|
|
// Create JsRuntimeInspector instance.
|
|
let mut self_ = Box::new(Self {
|
|
v8_inspector_client,
|
|
v8_inspector: Default::default(),
|
|
sessions: Default::default(),
|
|
new_session_tx,
|
|
flags,
|
|
waker,
|
|
deregister_tx: None,
|
|
});
|
|
self_.v8_inspector = Rc::new(RefCell::new(
|
|
v8::inspector::V8Inspector::create(scope, &mut *self_).into(),
|
|
));
|
|
self_.sessions =
|
|
SessionContainer::new(self_.v8_inspector.clone(), new_session_rx);
|
|
|
|
// 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_
|
|
.v8_inspector
|
|
.borrow_mut()
|
|
.as_mut()
|
|
.unwrap()
|
|
.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_
|
|
}
|
|
|
|
pub fn has_active_sessions(&self) -> bool {
|
|
let sessions = self.sessions.borrow();
|
|
!sessions.established.is_empty() || sessions.handshake.is_some()
|
|
}
|
|
|
|
fn poll_sessions(
|
|
&self,
|
|
mut invoker_cx: Option<&mut Context>,
|
|
) -> Result<Poll<()>, BorrowMutError> {
|
|
// 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();
|
|
}
|
|
};
|
|
}
|
|
}
|
|
|
|
/// Obtain a sender for proxy channels.
|
|
///
|
|
/// After a proxy is sent inspector will wait for a "handshake".
|
|
/// Frontend must send "Runtime.runIfWaitingForDebugger" message to
|
|
/// complete the handshake.
|
|
pub fn get_session_sender(&self) -> UnboundedSender<InspectorSessionProxy> {
|
|
self.new_session_tx.clone()
|
|
}
|
|
|
|
/// Create a channel that notifies the frontend when inspector is dropped.
|
|
///
|
|
/// NOTE: Only a single handler is currently available.
|
|
pub fn add_deregister_handler(&mut self) -> oneshot::Receiver<()> {
|
|
let (tx, rx) = oneshot::channel::<()>();
|
|
let prev = self.deregister_tx.replace(tx);
|
|
assert!(
|
|
prev.is_none(),
|
|
"Only a single deregister handler is allowed"
|
|
);
|
|
rx
|
|
}
|
|
|
|
/// Create a local inspector session that can be used on
|
|
/// the same thread as the isolate.
|
|
pub fn create_local_session(&self) -> LocalInspectorSession {
|
|
// The 'outbound' channel carries messages sent to the session.
|
|
let (outbound_tx, outbound_rx) = mpsc::unbounded();
|
|
|
|
// The 'inbound' channel carries messages received from the session.
|
|
let (inbound_tx, inbound_rx) = mpsc::unbounded();
|
|
|
|
let proxy = InspectorSessionProxy {
|
|
tx: outbound_tx,
|
|
rx: inbound_rx,
|
|
};
|
|
|
|
// InspectorSessions for a local session is added directly to the "established"
|
|
// sessions, so it doesn't need to go through the session sender and handshake
|
|
// phase.
|
|
let inspector_session =
|
|
InspectorSession::new(self.v8_inspector.clone(), proxy);
|
|
self
|
|
.sessions
|
|
.borrow_mut()
|
|
.established
|
|
.push(inspector_session);
|
|
take(&mut self.flags.borrow_mut().waiting_for_session);
|
|
|
|
LocalInspectorSession::new(inbound_tx, outbound_rx)
|
|
}
|
|
}
|
|
|
|
#[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_)
|
|
}
|
|
}
|
|
|
|
/// A helper structure that helps coordinate sessions during different
|
|
/// parts of their lifecycle.
|
|
struct SessionContainer {
|
|
new_incoming: Pin<Box<dyn Stream<Item = Box<InspectorSession>> + 'static>>,
|
|
handshake: Option<Box<InspectorSession>>,
|
|
established: FuturesUnordered<Box<InspectorSession>>,
|
|
}
|
|
|
|
impl SessionContainer {
|
|
fn new(
|
|
v8_inspector: Rc<RefCell<v8::UniquePtr<v8::inspector::V8Inspector>>>,
|
|
new_session_rx: UnboundedReceiver<InspectorSessionProxy>,
|
|
) -> RefCell<Self> {
|
|
let new_incoming = new_session_rx
|
|
.map(move |session_proxy| {
|
|
InspectorSession::new(v8_inspector.clone(), session_proxy)
|
|
})
|
|
.boxed_local();
|
|
let self_ = Self {
|
|
new_incoming,
|
|
..Default::default()
|
|
};
|
|
RefCell::new(self_)
|
|
}
|
|
}
|
|
|
|
impl Default for SessionContainer {
|
|
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<JsRuntimeInspector>>,
|
|
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();
|
|
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 JsRuntimeInspector) };
|
|
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;
|
|
});
|
|
}
|
|
}
|
|
|
|
/// An inspector session that proxies messages to concrete "transport layer",
|
|
/// eg. Websocket or another set of channels.
|
|
struct InspectorSession {
|
|
v8_channel: v8::inspector::ChannelBase,
|
|
v8_session: Rc<RefCell<v8::UniqueRef<v8::inspector::V8InspectorSession>>>,
|
|
proxy_tx: SessionProxySender,
|
|
proxy_rx_handler: Pin<Box<dyn Future<Output = ()> + 'static>>,
|
|
}
|
|
|
|
impl InspectorSession {
|
|
const CONTEXT_GROUP_ID: i32 = 1;
|
|
|
|
pub fn new(
|
|
v8_inspector_rc: Rc<RefCell<v8::UniquePtr<v8::inspector::V8Inspector>>>,
|
|
session_proxy: InspectorSessionProxy,
|
|
) -> Box<Self> {
|
|
new_box_with(move |self_ptr| {
|
|
let v8_channel = v8::inspector::ChannelBase::new::<Self>();
|
|
let mut v8_inspector = v8_inspector_rc.borrow_mut();
|
|
let v8_inspector_ptr = v8_inspector.as_mut().unwrap();
|
|
let v8_session = Rc::new(RefCell::new(v8_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 (proxy_tx, proxy_rx) = session_proxy.split();
|
|
let proxy_rx_handler =
|
|
Self::receive_from_proxy(v8_session.clone(), proxy_rx);
|
|
|
|
Self {
|
|
v8_channel,
|
|
v8_session,
|
|
proxy_tx,
|
|
proxy_rx_handler,
|
|
}
|
|
})
|
|
}
|
|
|
|
// Dispatch message to V8 session
|
|
#[allow(unused)]
|
|
fn dispatch_message(&mut self, msg: Vec<u8>) {
|
|
let msg = v8::inspector::StringView::from(msg.as_slice());
|
|
let mut v8_session = self.v8_session.borrow_mut();
|
|
let v8_session_ptr = v8_session.as_mut();
|
|
v8_session_ptr.dispatch_protocol_message(msg);
|
|
}
|
|
|
|
// TODO(bartlomieju): this function should be reworked into `impl Future`
|
|
// or `impl Stream`
|
|
/// Returns a future that receives messages from the proxy and dispatches
|
|
/// them to the V8 session.
|
|
fn receive_from_proxy(
|
|
v8_session_rc: Rc<
|
|
RefCell<v8::UniqueRef<v8::inspector::V8InspectorSession>>,
|
|
>,
|
|
proxy_rx: SessionProxyReceiver,
|
|
) -> Pin<Box<dyn Future<Output = ()> + 'static>> {
|
|
async move {
|
|
let result = proxy_rx
|
|
.map_ok(move |msg| {
|
|
let msg = v8::inspector::StringView::from(msg.as_slice());
|
|
let mut v8_session = v8_session_rc.borrow_mut();
|
|
let v8_session_ptr = v8_session.as_mut();
|
|
v8_session_ptr.dispatch_protocol_message(msg);
|
|
})
|
|
.try_collect::<()>()
|
|
.await;
|
|
|
|
// TODO(bartlomieju): ideally these prints should be moved
|
|
// to `server.rs` as they are unwanted in context of REPL/coverage collection
|
|
// but right now they do not pose a huge problem. Investigate how to
|
|
// move them to `server.rs`.
|
|
match result {
|
|
Ok(_) => eprintln!("Debugger session ended."),
|
|
Err(err) => eprintln!("Debugger session ended: {}.", err),
|
|
};
|
|
}
|
|
.boxed_local()
|
|
}
|
|
|
|
fn send_message(
|
|
&self,
|
|
maybe_call_id: Option<i32>,
|
|
msg: v8::UniquePtr<v8::inspector::StringBuffer>,
|
|
) {
|
|
let msg = msg.unwrap().string().to_string();
|
|
let _ = self.proxy_tx.unbounded_send((maybe_call_id, msg));
|
|
}
|
|
|
|
pub fn break_on_next_statement(&mut self) {
|
|
let reason = v8::inspector::StringView::from(&b"debugCommand"[..]);
|
|
let detail = v8::inspector::StringView::empty();
|
|
self
|
|
.v8_session
|
|
.borrow_mut()
|
|
.as_mut()
|
|
.schedule_pause_on_next_statement(reason, detail);
|
|
}
|
|
}
|
|
|
|
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>,
|
|
) {
|
|
self.send_message(Some(call_id), message);
|
|
}
|
|
|
|
fn send_notification(
|
|
&mut self,
|
|
message: v8::UniquePtr<v8::inspector::StringBuffer>,
|
|
) {
|
|
self.send_message(None, message);
|
|
}
|
|
|
|
fn flush_protocol_notifications(&mut self) {}
|
|
}
|
|
|
|
impl Future for InspectorSession {
|
|
type Output = ();
|
|
fn poll(mut self: Pin<&mut Self>, cx: &mut Context) -> Poll<Self::Output> {
|
|
self.proxy_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 LocalInspectorSession {
|
|
v8_session_tx: UnboundedSender<Result<Vec<u8>, AnyError>>,
|
|
v8_session_rx: UnboundedReceiver<(Option<i32>, String)>,
|
|
response_tx_map: HashMap<i32, oneshot::Sender<serde_json::Value>>,
|
|
next_message_id: i32,
|
|
notification_queue: Vec<Value>,
|
|
}
|
|
|
|
impl LocalInspectorSession {
|
|
pub fn new(
|
|
v8_session_tx: UnboundedSender<Result<Vec<u8>, AnyError>>,
|
|
v8_session_rx: UnboundedReceiver<(Option<i32>, String)>,
|
|
) -> Self {
|
|
let response_tx_map = HashMap::new();
|
|
let next_message_id = 0;
|
|
|
|
let notification_queue = Vec::new();
|
|
|
|
Self {
|
|
v8_session_tx,
|
|
v8_session_rx,
|
|
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, mut 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();
|
|
self
|
|
.v8_session_tx
|
|
.unbounded_send(Ok(raw_message.as_bytes().to_vec()))
|
|
.unwrap();
|
|
|
|
loop {
|
|
let receive_fut = self.receive_from_v8_session().boxed_local();
|
|
match select(receive_fut, &mut response_rx).await {
|
|
Either::Left(_) => continue,
|
|
Either::Right((result, _)) => {
|
|
let response = result?;
|
|
if let Some(error) = response.get("error") {
|
|
return Err(generic_error(error.to_string()));
|
|
}
|
|
|
|
let result = response.get("result").unwrap().clone();
|
|
return Ok(result);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
async fn receive_from_v8_session(&mut self) {
|
|
let (maybe_call_id, message) = self.v8_session_rx.next().await.unwrap();
|
|
// If there's no call_id then it's a notification
|
|
if let Some(call_id) = maybe_call_id {
|
|
let message: serde_json::Value = match serde_json::from_str(&message) {
|
|
Ok(v) => v,
|
|
Err(error) => match error.classify() {
|
|
serde_json::error::Category::Syntax => json!({
|
|
"id": call_id,
|
|
"result": {
|
|
"result": {
|
|
"type": "error",
|
|
"description": "Unterminated string literal",
|
|
"value": "Unterminated string literal",
|
|
},
|
|
"exceptionDetails": {
|
|
"exceptionId": 0,
|
|
"text": "Unterminated string literal",
|
|
"lineNumber": 0,
|
|
"columnNumber": 0
|
|
},
|
|
},
|
|
}),
|
|
_ => panic!("Could not parse inspector message"),
|
|
},
|
|
};
|
|
|
|
self
|
|
.response_tx_map
|
|
.remove(&call_id)
|
|
.unwrap()
|
|
.send(message)
|
|
.unwrap();
|
|
} else {
|
|
let message = serde_json::from_str(&message).unwrap();
|
|
self.notification_queue.push(message);
|
|
}
|
|
}
|
|
}
|
|
|
|
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) }
|
|
}
|