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helix/helix-dap/src/client.rs

397 lines
12 KiB
Rust

use crate::{
transport::{Payload, Request, Transport},
types::*,
Error, Result,
};
use anyhow::anyhow;
pub use log::{error, info};
use std::{
collections::HashMap,
net::{IpAddr, Ipv4Addr, SocketAddr},
path::PathBuf,
process::Stdio,
sync::atomic::{AtomicU64, Ordering},
};
use tokio::{
io::{AsyncBufRead, AsyncWrite, BufReader, BufWriter},
net::TcpStream,
process::{Child, Command},
sync::mpsc::{channel, unbounded_channel, UnboundedReceiver, UnboundedSender},
time,
};
#[derive(Debug)]
pub struct Client {
id: usize,
_process: Option<Child>,
server_tx: UnboundedSender<Request>,
request_counter: AtomicU64,
pub caps: Option<DebuggerCapabilities>,
// thread_id -> frames
pub stack_frames: HashMap<isize, Vec<StackFrame>>,
pub thread_states: HashMap<isize, String>,
pub thread_id: Option<isize>,
/// Currently active frame for the current thread.
pub active_frame: Option<usize>,
}
impl Client {
// Spawn a process and communicate with it by either TCP or stdio
pub async fn process(
transport: String,
command: String,
args: Vec<String>,
port_arg: Option<String>,
id: usize,
) -> Result<(Self, UnboundedReceiver<Payload>)> {
if transport == "tcp" && port_arg.is_some() {
Self::tcp_process(
&command,
args.iter().map(|s| s.as_str()).collect(),
&port_arg.unwrap(),
id,
)
.await
} else if transport == "stdio" {
Self::stdio(&command, args.iter().map(|s| s.as_str()).collect(), id)
} else {
Result::Err(Error::Other(anyhow!("Incorrect transport {}", transport)))
}
}
pub fn streams(
rx: Box<dyn AsyncBufRead + Unpin + Send>,
tx: Box<dyn AsyncWrite + Unpin + Send>,
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err: Option<Box<dyn AsyncBufRead + Unpin + Send>>,
id: usize,
process: Option<Child>,
) -> Result<(Self, UnboundedReceiver<Payload>)> {
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let (server_rx, server_tx) = Transport::start(rx, tx, err, id);
let (client_rx, client_tx) = unbounded_channel();
let client = Self {
id,
_process: process,
server_tx,
request_counter: AtomicU64::new(0),
caps: None,
//
stack_frames: HashMap::new(),
thread_states: HashMap::new(),
thread_id: None,
active_frame: None,
};
tokio::spawn(Self::recv(server_rx, client_rx));
Ok((client, client_tx))
}
pub async fn tcp(
addr: std::net::SocketAddr,
id: usize,
) -> Result<(Self, UnboundedReceiver<Payload>)> {
let stream = TcpStream::connect(addr).await?;
let (rx, tx) = stream.into_split();
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Self::streams(Box::new(BufReader::new(rx)), Box::new(tx), None, id, None)
}
pub fn stdio(
cmd: &str,
args: Vec<&str>,
id: usize,
) -> Result<(Self, UnboundedReceiver<Payload>)> {
let process = Command::new(cmd)
.args(args)
.stdin(Stdio::piped())
.stdout(Stdio::piped())
// make sure the process is reaped on drop
.kill_on_drop(true)
.spawn();
let mut process = process?;
// TODO: do we need bufreader/writer here? or do we use async wrappers on unblock?
let writer = BufWriter::new(process.stdin.take().expect("Failed to open stdin"));
let reader = BufReader::new(process.stdout.take().expect("Failed to open stdout"));
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let errors = BufReader::new(process.stderr.take().expect("Failed to open stderr"));
Self::streams(
Box::new(BufReader::new(reader)),
Box::new(writer),
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Some(Box::new(BufReader::new(errors))),
id,
Some(process),
)
}
async fn get_port() -> Option<u16> {
Some(
tokio::net::TcpListener::bind(SocketAddr::new(
IpAddr::V4(Ipv4Addr::new(127, 0, 0, 1)),
0,
))
.await
.ok()?
.local_addr()
.ok()?
.port(),
)
}
pub async fn tcp_process(
cmd: &str,
args: Vec<&str>,
port_format: &str,
id: usize,
) -> Result<(Self, UnboundedReceiver<Payload>)> {
let port = Self::get_port().await.unwrap();
let process = Command::new(cmd)
.args(args)
.args(port_format.replace("{}", &port.to_string()).split(' '))
// silence messages
.stdin(Stdio::null())
.stdout(Stdio::null())
.stderr(Stdio::null())
// Do not kill debug adapter when leaving, it should exit automatically
.spawn()?;
// Wait for adapter to become ready for connection
time::sleep(time::Duration::from_millis(500)).await;
let stream = TcpStream::connect(SocketAddr::new(
IpAddr::V4(Ipv4Addr::new(127, 0, 0, 1)),
port,
))
.await?;
let (rx, tx) = stream.into_split();
Self::streams(
Box::new(BufReader::new(rx)),
Box::new(tx),
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None,
id,
Some(process),
)
}
async fn recv(mut server_rx: UnboundedReceiver<Payload>, client_tx: UnboundedSender<Payload>) {
while let Some(msg) = server_rx.recv().await {
match msg {
Payload::Event(ev) => {
client_tx.send(Payload::Event(ev)).expect("Failed to send");
}
Payload::Response(_) => unreachable!(),
Payload::Request(req) => {
client_tx
.send(Payload::Request(req))
.expect("Failed to send");
}
}
}
}
pub fn id(&self) -> usize {
self.id
}
fn next_request_id(&self) -> u64 {
self.request_counter.fetch_add(1, Ordering::Relaxed)
}
async fn request<R: crate::types::Request>(
&self,
arguments: R::Arguments,
) -> Result<R::Result> {
let (callback_tx, mut callback_rx) = channel(1);
let arguments = Some(serde_json::to_value(arguments)?);
let req = Request {
back_ch: Some(callback_tx),
seq: self.next_request_id(),
command: R::COMMAND.to_string(),
arguments,
};
self.server_tx
.send(req)
.expect("Failed to send request to debugger");
let response = callback_rx.recv().await.unwrap()?;
let response = serde_json::from_value(response.body.unwrap_or_default())?;
Ok(response)
}
pub fn capabilities(&self) -> &DebuggerCapabilities {
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self.caps.as_ref().expect("debugger not yet initialized!")
}
pub async fn initialize(&mut self, adapter_id: String) -> Result<()> {
let args = requests::InitializeArguments {
client_id: Some("hx".to_owned()),
client_name: Some("helix".to_owned()),
adapter_id,
locale: Some("en-us".to_owned()),
lines_start_at_one: Some(true),
columns_start_at_one: Some(true),
path_format: Some("path".to_owned()),
supports_variable_type: Some(true),
supports_variable_paging: Some(false),
supports_run_in_terminal_request: Some(false),
supports_memory_references: Some(false),
supports_progress_reporting: Some(false),
supports_invalidated_event: Some(false),
};
let response = self.request::<requests::Initialize>(args).await?;
self.caps = Some(response);
Ok(())
}
pub async fn disconnect(&mut self) -> Result<()> {
self.request::<requests::Disconnect>(()).await
}
pub async fn launch(&mut self, args: serde_json::Value) -> Result<()> {
let response = self.request::<requests::Launch>(args).await?;
log::error!("launch response {}", response);
Ok(())
}
pub async fn attach(&mut self, args: serde_json::Value) -> Result<()> {
let response = self.request::<requests::Attach>(args).await?;
log::error!("attach response {}", response);
Ok(())
}
pub async fn set_breakpoints(
&mut self,
file: PathBuf,
breakpoints: Vec<SourceBreakpoint>,
) -> Result<Option<Vec<Breakpoint>>> {
let args = requests::SetBreakpointsArguments {
source: Source {
path: Some(file),
name: None,
source_reference: None,
presentation_hint: None,
origin: None,
sources: None,
adapter_data: None,
checksums: None,
},
breakpoints: Some(breakpoints),
source_modified: Some(false),
};
let response = self.request::<requests::SetBreakpoints>(args).await?;
Ok(response.breakpoints)
}
pub async fn configuration_done(&mut self) -> Result<()> {
self.request::<requests::ConfigurationDone>(()).await
}
pub async fn continue_thread(&mut self, thread_id: isize) -> Result<Option<bool>> {
let args = requests::ContinueArguments { thread_id };
let response = self.request::<requests::Continue>(args).await?;
Ok(response.all_threads_continued)
}
pub async fn stack_trace(
&mut self,
thread_id: isize,
) -> Result<(Vec<StackFrame>, Option<usize>)> {
let args = requests::StackTraceArguments {
thread_id,
start_frame: None,
levels: None,
format: None,
};
let response = self.request::<requests::StackTrace>(args).await?;
Ok((response.stack_frames, response.total_frames))
}
pub async fn threads(&mut self) -> Result<Vec<Thread>> {
let response = self.request::<requests::Threads>(()).await?;
Ok(response.threads)
}
pub async fn scopes(&mut self, frame_id: usize) -> Result<Vec<Scope>> {
let args = requests::ScopesArguments { frame_id };
let response = self.request::<requests::Scopes>(args).await?;
Ok(response.scopes)
}
pub async fn variables(&mut self, variables_reference: usize) -> Result<Vec<Variable>> {
let args = requests::VariablesArguments {
variables_reference,
filter: None,
start: None,
count: None,
format: None,
};
let response = self.request::<requests::Variables>(args).await?;
Ok(response.variables)
}
pub async fn step_in(&mut self, thread_id: isize) -> Result<()> {
let args = requests::StepInArguments {
thread_id,
target_id: None,
granularity: None,
};
self.request::<requests::StepIn>(args).await
}
pub async fn step_out(&mut self, thread_id: isize) -> Result<()> {
let args = requests::StepOutArguments {
thread_id,
granularity: None,
};
self.request::<requests::StepOut>(args).await
}
pub async fn next(&mut self, thread_id: isize) -> Result<()> {
let args = requests::NextArguments {
thread_id,
granularity: None,
};
self.request::<requests::Next>(args).await
}
pub async fn pause(&mut self, thread_id: isize) -> Result<()> {
let args = requests::PauseArguments { thread_id };
self.request::<requests::Pause>(args).await
}
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pub async fn eval(
&mut self,
expression: String,
frame_id: Option<usize>,
) -> Result<requests::EvaluateResponse> {
let args = requests::EvaluateArguments {
expression,
frame_id,
context: None,
format: None,
};
self.request::<requests::Evaluate>(args).await
}
}