Implement Deno.kill for windows (#5347)

cli/js/lib.deno.unstable.d.ts

@@ -1120,8 +1120,6 @@ declare namespace Deno {
    *
    *      Deno.kill(p.pid, Deno.Signal.SIGINT);
    *
-   * Throws Error (not yet implemented) on Windows
-   *
    * Requires `allow-run` permission. */
   export function kill(pid: number, signo: number): void;
 

cli/js/ops/process.ts

@@ -1,12 +1,8 @@
 // Copyright 2018-2020 the Deno authors. All rights reserved. MIT license.
 import { sendSync, sendAsync } from "./dispatch_json.ts";
 import { assert } from "../util.ts";
-import { build } from "../build.ts";
 
 export function kill(pid: number, signo: number): void {
-  if (build.os === "windows") {
-    throw new Error("Not yet implemented");
-  }
   sendSync("op_kill", { pid, signo });
 }
 

cli/js/tests/process_test.ts

@@ -5,12 +5,20 @@ import {
   assertStrContains,
   unitTest,
 } from "./test_util.ts";
-const { kill, run, readFile, open, makeTempDir, writeFile } = Deno;
+const {
+  kill,
+  run,
+  readFile,
+  open,
+  makeTempDir,
+  writeFile,
+  writeFileSync,
+} = Deno;
 
 unitTest(function runPermissions(): void {
   let caughtError = false;
   try {
-    Deno.run({ cmd: ["python", "-c", "print('hello world')"] });
+    run({ cmd: ["python", "-c", "print('hello world')"] });
   } catch (e) {
     caughtError = true;
     assert(e instanceof Deno.errors.PermissionDenied);
@@ -99,7 +107,7 @@ while True:
     pass
 `;
 
-    Deno.writeFileSync(`${cwd}/${pyProgramFile}.py`, enc.encode(pyProgram));
+    writeFileSync(`${cwd}/${pyProgramFile}.py`, enc.encode(pyProgram));
     const p = run({
       cwd,
       cmd: ["python", `${pyProgramFile}.py`],
@@ -108,7 +116,7 @@ while True:
     // Write the expected exit code *after* starting python.
     // This is how we verify that `run()` is actually asynchronous.
     const code = 84;
-    Deno.writeFileSync(`${cwd}/${exitCodeFile}`, enc.encode(`${code}`));
+    writeFileSync(`${cwd}/${exitCodeFile}`, enc.encode(`${code}`));
 
     const status = await p.status();
     assertEquals(status.success, false);
@@ -325,8 +333,6 @@ unitTest(function signalNumbers(): void {
   }
 });
 
-// Ignore signal tests on windows for now...
-if (Deno.build.os !== "windows") {
 unitTest(function killPermissions(): void {
   let caughtError = false;
   try {
@@ -334,7 +340,7 @@ if (Deno.build.os !== "windows") {
     // subprocess we can safely kill. Instead we send SIGCONT to the current
     // process - assuming that Deno does not have a special handler set for it
     // and will just continue even if a signal is erroneously sent.
-      Deno.kill(Deno.pid, Deno.Signal.SIGCONT);
+    kill(Deno.pid, Deno.Signal.SIGCONT);
   } catch (e) {
     caughtError = true;
     assert(e instanceof Deno.errors.PermissionDenied);
@@ -342,9 +348,7 @@ if (Deno.build.os !== "windows") {
   assert(caughtError);
 });
 
-  unitTest({ perms: { run: true } }, async function killSuccess(): Promise<
-    void
-  > {
+unitTest({ perms: { run: true } }, async function killSuccess(): Promise<void> {
   const p = run({
     cmd: ["python", "-c", "from time import sleep; sleep(10000)"],
   });
@@ -375,10 +379,8 @@ if (Deno.build.os !== "windows") {
   } catch (e) {
     err = e;
   }
-
   assert(!!err);
   assert(err instanceof TypeError);
 
   p.close();
 });
-}

cli/signal.rs

@@ -1,6 +1,23 @@
 // Copyright 2018-2020 the Deno authors. All rights reserved. MIT license.
 use crate::op_error::OpError;
 
+#[cfg(not(unix))]
+const SIGINT: i32 = 2;
+#[cfg(not(unix))]
+const SIGKILL: i32 = 9;
+#[cfg(not(unix))]
+const SIGTERM: i32 = 15;
+
+#[cfg(not(unix))]
+use winapi::{
+  shared::minwindef::DWORD,
+  um::{
+    handleapi::CloseHandle,
+    processthreadsapi::{OpenProcess, TerminateProcess},
+    winnt::PROCESS_TERMINATE,
+  },
+};
+
 #[cfg(unix)]
 pub fn kill(pid: i32, signo: i32) -> Result<(), OpError> {
   use nix::sys::signal::{kill as unix_kill, Signal};
@@ -11,7 +28,29 @@ pub fn kill(pid: i32, signo: i32) -> Result<(), OpError> {
 }
 
 #[cfg(not(unix))]
-pub fn kill(_pid: i32, _signal: i32) -> Result<(), OpError> {
-  // TODO: implement this for windows
+pub fn kill(pid: i32, signal: i32) -> Result<(), OpError> {
+  match signal {
+    SIGINT | SIGKILL | SIGTERM => {
+      if pid <= 0 {
+        return Err(OpError::type_error("unsupported pid".to_string()));
+      }
+      unsafe {
+        let handle = OpenProcess(PROCESS_TERMINATE, 0, pid as DWORD);
+        if handle.is_null() {
+          return Err(OpError::from(std::io::Error::last_os_error()));
+        }
+        if TerminateProcess(handle, 1) == 0 {
+          CloseHandle(handle);
+          return Err(OpError::from(std::io::Error::last_os_error()));
+        }
+        if CloseHandle(handle) == 0 {
+          return Err(OpError::from(std::io::Error::last_os_error()));
+        }
+      }
+    }
+    _ => {
+      return Err(OpError::type_error("unsupported signal".to_string()));
+    }
+  }
   Ok(())
 }

std/http/server_test.ts

@@ -351,12 +351,15 @@ test("requestBodyReaderWithTransferEncoding", async function (): Promise<void> {
 
 test({
   name: "destroyed connection",
-  // FIXME(bartlomieju): hangs on windows, cause can't do `Deno.kill`
-  ignore: true,
   fn: async (): Promise<void> => {
     // Runs a simple server as another process
     const p = Deno.run({
-      cmd: [Deno.execPath(), "--allow-net", "http/testdata/simple_server.ts"],
+      cmd: [
+        Deno.execPath(),
+        "run",
+        "--allow-net",
+        "http/testdata/simple_server.ts",
+      ],
       stdout: "piped",
     });
 
@@ -392,13 +395,12 @@ test({
 
 test({
   name: "serveTLS",
-  // FIXME(bartlomieju): hangs on windows, cause can't do `Deno.kill`
-  ignore: true,
   fn: async (): Promise<void> => {
     // Runs a simple server as another process
     const p = Deno.run({
       cmd: [
         Deno.execPath(),
+        "run",
         "--allow-net",
         "--allow-read",
         "http/testdata/simple_https_server.ts",