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'use strict';
const common = require('../common');
if (common.isWindows)
common.skip('no signals in Windows');
if (!common.isMainThread)
common.skip('No signal handling available in Workers');
const assert = require('assert');
const initHooks = require('./init-hooks');
const { checkInvocations } = require('./hook-checks');
const exec = require('child_process').exec;
const hooks = initHooks();
hooks.enable();
// Keep the event loop open so process doesn't exit before receiving signals.
const interval = setInterval(() => {}, 9999);
process.on('SIGUSR2', common.mustCall(onsigusr2, 2));
const as = hooks.activitiesOfTypes('SIGNALWRAP');
assert.strictEqual(as.length, 1);
const signal1 = as[0];
assert.strictEqual(signal1.type, 'SIGNALWRAP');
assert.strictEqual(typeof signal1.uid, 'number');
assert.strictEqual(typeof signal1.triggerAsyncId, 'number');
checkInvocations(signal1, { init: 1 }, 'when SIGUSR2 handler is set up');
let count = 0;
exec(`kill -USR2 ${process.pid}`);
let signal2;
function onsigusr2() {
count++;
if (count === 1) {
// first invocation
checkInvocations(
signal1, { init: 1, before: 1 },
' signal1: when first SIGUSR2 handler is called for the first time');
// Trigger same signal handler again
exec(`kill -USR2 ${process.pid}`);
} else {
// second invocation
checkInvocations(
signal1, { init: 1, before: 2, after: 1 },
'signal1: when first SIGUSR2 handler is called for the second time');
// Install another signal handler
process.removeAllListeners('SIGUSR2');
process.on('SIGUSR2', common.mustCall(onsigusr2Again));
const as = hooks.activitiesOfTypes('SIGNALWRAP');
// The isTTY checks are needed to allow test to work whether run with
// test.py or directly with the node executable. The third signal event
// listener is the SIGWINCH handler that node installs when it thinks
// process.stdout is a tty.
const expectedLen = 2 + (!!process.stdout.isTTY || !!process.stderr.isTTY);
assert.strictEqual(as.length, expectedLen);
signal2 = as[expectedLen - 1]; // Last item in the array.
assert.strictEqual(signal2.type, 'SIGNALWRAP');
assert.strictEqual(typeof signal2.uid, 'number');
assert.strictEqual(typeof signal2.triggerAsyncId, 'number');
checkInvocations(
signal1, { init: 1, before: 2, after: 1 },
'signal1: when second SIGUSR2 handler is set up');
checkInvocations(
signal2, { init: 1 },
'signal2: when second SIGUSR2 handler is setup');
exec(`kill -USR2 ${process.pid}`);
}
}
function onsigusr2Again() {
clearInterval(interval);
setImmediate(() => {
checkInvocations(
signal1, { init: 1, before: 2, after: 2, destroy: 1 },
'signal1: when second SIGUSR2 handler is called');
checkInvocations(
signal2, { init: 1, before: 1 },
'signal2: when second SIGUSR2 handler is called');
});
}
process.on('exit', onexit);
function onexit() {
hooks.disable();
hooks.sanityCheck('SIGNALWRAP');
checkInvocations(
signal1, { init: 1, before: 2, after: 2, destroy: 1 },
'signal1: when second SIGUSR2 process exits');
// Second signal not destroyed yet since its event listener is still active
checkInvocations(
signal2, { init: 1, before: 1, after: 1 },
'signal2: when second SIGUSR2 process exits');
}
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