src,lib: make ^C print a JS stack trace

If terminating the process with ctrl-c / SIGINT, prints a JS stacktrace
leading up to the currently executing code.

The feature would be enabled under option `--trace-sigint`.

Conditions of no stacktrace on sigint:

- has (an) active sigint listener(s);
- main thread is idle (i.e. uv polling), a message instead of stacktrace
  would be printed.

PR-URL: https://github.com/nodejs/node/pull/29207
Reviewed-By: Anna Henningsen <anna@addaleax.net>
Reviewed-By: Matteo Collina <matteo.collina@gmail.com>
Reviewed-By: Ben Noordhuis <info@bnoordhuis.nl>
Reviewed-By: Joyee Cheung <joyeec9h3@gmail.com>
Reviewed-By: Christopher Hiller <boneskull@boneskull.com>
Reviewed-By: Rich Trott <rtrott@gmail.com>

1 files changed, 30 insertions, 0 deletions

diff --git a/test/pseudo-tty/test-trace-sigint.js b/test/pseudo-tty/test-trace-sigint.js
new file mode 100644
index 0000000000..8b539bfc88
--- /dev/null
+++ b/test/pseudo-tty/test-trace-sigint.js
@@ -0,0 +1,30 @@
+'use strict';
+
+const { mustCall } = require('../common');
+const childProcess = require('child_process');
+const assert = require('assert');
+
+if (process.env.CHILD === 'true') {
+  main();
+} else {
+  // Use inherited stdio child process to prevent test tools from determining
+  // the case as crashed from SIGINT
+  const cp = childProcess.spawn(
+    process.execPath,
+    ['--trace-sigint', __filename],
+    {
+      env: { ...process.env, CHILD: 'true' },
+      stdio: 'inherit'
+    });
+  cp.on('exit', mustCall((code, signal) => {
+    assert.strictEqual(signal, 'SIGINT');
+    assert.strictEqual(code, null);
+  }));
+}
+
+function main() {
+  // Deactivate colors even if the tty does support colors.
+  process.env.NODE_DISABLE_COLORS = '1';
+  process.kill(process.pid, 'SIGINT');
+  while (true) {}
+}