process signal events (#3569)

* signal events

* simple tests

* ignore SIGSTOP

* better tests

* use `EventEmitter`

* use `Bun__getDefaultGlobal`

* progress

* don't use 'Bun__getDefaultGlobal`

* fix tests

* remove signals from map

* update tests

* don't overwrite event emitter methods

* avoid two lookups

* use `std::once`

* releaseEarly()

* Remove signal handler after use

* Update call-raise.js

* Create process-signal-handler.fixture.js

* Don't register duplicates

* Add missing lock

* another test

* update test

* revert some changes

---------

Co-authored-by: Jarred Sumner <709451+Jarred-Sumner@users.noreply.github.com>

1 files changed, 24 insertions, 2 deletions

diff --git a/test/js/node/process/process.test.js b/test/js/node/process/process.test.js
index e038383de..51825b2b4 100644
--- a/test/js/node/process/process.test.js
+++ b/test/js/node/process/process.test.js
@@ -1,6 +1,6 @@
-import { resolveSync, spawnSync, which } from "bun";
+import { spawnSync, which } from "bun";
 import { describe, expect, it } from "bun:test";
-import { existsSync, readFileSync, realpathSync } from "fs";
+import { existsSync, readFileSync } from "fs";
 import { bunEnv, bunExe } from "harness";
 import { basename, join, resolve } from "path";
 
@@ -381,6 +381,28 @@ it("process.getuid", () => {
   expect(typeof process.getuid()).toBe("number");
 });
 
+describe("signal", () => {
+  const fixture = join(import.meta.dir, "./process-signal-handler.fixture.js");
+  it("simple case works", async () => {
+    const child = Bun.spawn({
+      cmd: [bunExe(), fixture, "SIGUSR1"],
+      env: bunEnv,
+    });
+
+    expect(await child.exited).toBe(0);
+    expect(await new Response(child.stdout).text()).toBe("PASS\n");
+  });
+  it("process.emit will call signal events", async () => {
+    const child = Bun.spawn({
+      cmd: [bunExe(), fixture, "SIGUSR2"],
+      env: bunEnv,
+    });
+
+    expect(await child.exited).toBe(0);
+    expect(await new Response(child.stdout).text()).toBe("PASS\n");
+  });
+});
+
 const undefinedStubs = [
   "_debugEnd",
   "_debugProcess",