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741afc4b94
Ensures the Deno process is brought down even when the runtime gets hung up on something. Marvin found that the lsp was running without a parent vscode around so this is maybe/probably related.
70 lines
1.9 KiB
Rust
70 lines
1.9 KiB
Rust
// Copyright 2018-2024 the Deno authors. All rights reserved. MIT license.
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use std::time::Duration;
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/// Starts a thread that will check for the existence of the
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/// provided process id. Once that process no longer exists
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/// it will terminate the current process.
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pub fn start(parent_process_id: u32) {
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// use a separate thread in case the runtime gets hung up
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std::thread::spawn(move || loop {
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std::thread::sleep(Duration::from_secs(10));
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if !is_process_active(parent_process_id) {
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std::process::exit(1);
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}
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});
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}
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#[cfg(unix)]
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fn is_process_active(process_id: u32) -> bool {
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// TODO(bartlomieju):
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#[allow(clippy::undocumented_unsafe_blocks)]
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unsafe {
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// signal of 0 checks for the existence of the process id
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libc::kill(process_id as i32, 0) == 0
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}
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}
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#[cfg(windows)]
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fn is_process_active(process_id: u32) -> bool {
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use winapi::shared::minwindef::DWORD;
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use winapi::shared::minwindef::FALSE;
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use winapi::shared::ntdef::NULL;
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use winapi::shared::winerror::WAIT_TIMEOUT;
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use winapi::um::handleapi::CloseHandle;
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use winapi::um::processthreadsapi::OpenProcess;
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use winapi::um::synchapi::WaitForSingleObject;
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use winapi::um::winnt::SYNCHRONIZE;
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// SAFETY: winapi calls
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unsafe {
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let process = OpenProcess(SYNCHRONIZE, FALSE, process_id as DWORD);
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let result = if process == NULL {
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false
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} else {
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WaitForSingleObject(process, 0) == WAIT_TIMEOUT
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};
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CloseHandle(process);
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result
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}
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}
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#[cfg(test)]
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mod test {
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use super::is_process_active;
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use std::process::Command;
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use test_util::deno_exe_path;
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#[test]
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fn process_active() {
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// launch a long running process
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let mut child = Command::new(deno_exe_path()).arg("lsp").spawn().unwrap();
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let pid = child.id();
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assert!(is_process_active(pid));
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child.kill().unwrap();
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child.wait().unwrap();
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assert!(!is_process_active(pid));
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}
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}
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