mirror of
https://github.com/affaan-m/ECC.git
synced 2026-10-15 12:45:29 +02:00
242 lines
9.5 KiB
JavaScript
242 lines
9.5 KiB
JavaScript
'use strict';
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const fs = require('fs');
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const os = require('os');
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const path = require('path');
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const { fork } = require('child_process');
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// These utilities belong only to the two process-based regression fixtures.
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async function withCleanup(callback, cleanups) {
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let failed = false;
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let primary;
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let value;
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try { value = await callback(); }
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catch (error) { failed = true; primary = error; }
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for (const cleanup of cleanups) {
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try { await cleanup(); }
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catch (error) { if (!failed) { failed = true; primary = error; } }
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}
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if (failed) throw primary;
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return value;
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}
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function startOwnedChild(script, args = [], dependencies = {}) {
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const forkChild = dependencies.fork || fork;
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const platform = dependencies.platform || process.platform;
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const kill = dependencies.kill || process.kill.bind(process);
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const root = fs.mkdtempSync(path.join(os.tmpdir(), 'ecc-state-child-'));
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const home = path.join(root, 'home');
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const tmp = path.join(root, 'tmp');
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let child;
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try {
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fs.mkdirSync(home); fs.mkdirSync(tmp);
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// Absolute fixture paths resolve dependencies from the checkout, even with
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// an isolated cwd. No package-private metadata or NODE_PATH is needed.
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child = forkChild(script, args, {
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execPath: process.execPath, execArgv: [], shell: false, detached: platform !== 'win32',
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cwd: root, stdio: ['ignore', 'pipe', 'pipe', 'ipc'],
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env: { PATH: path.dirname(process.execPath),
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HOME: home, USERPROFILE: home, APPDATA: home, LOCALAPPDATA: home,
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TMPDIR: tmp, TMP: tmp, TEMP: tmp, NODE_USE_ENV_PROXY: '0' },
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});
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} catch (error) {
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try { fs.rmSync(root, { recursive: true, force: true }); } catch (_cleanupError) { /* Primary wins. */ }
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throw error;
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}
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const observers = new Set();
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const waiters = new Set();
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const closeWaiters = new Set();
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let ownedPid = null;
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let closed = false;
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let ipcClosed = false;
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const closedStreams = new Set();
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let reaped = false;
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let exitCode = null;
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let exitSignal = null;
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let failed = false;
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let failure;
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let stderr = '';
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let captured = 0;
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let stopPromise;
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const fail = error => {
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if (!failed) { failed = true; failure = error; }
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for (const waiter of [...waiters]) waiter.reject(error);
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};
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const markClosed = () => {
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closed = true;
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for (const done of [...closeWaiters]) done(true);
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};
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// Some Node versions omit the aggregate close event after a parent-initiated
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// IPC disconnect. Require public confirmation of every owned resource instead.
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const checkClosed = () => {
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if (reaped && ipcClosed && closedStreams.size === 2) markClosed();
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};
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child.once('disconnect', () => { ipcClosed = true; checkClosed(); });
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child.once('spawn', () => { if (Number.isInteger(child.pid) && child.pid > 0) ownedPid = child.pid; });
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child.on('error', fail);
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child.once('exit', (code, signal) => {
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reaped = true; exitCode = code; exitSignal = signal;
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const error = new Error(`Fixture exited (${code}, ${signal || 'no signal'}): ${stderr}`);
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for (const waiter of [...waiters]) waiter.reject(error);
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checkClosed();
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});
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child.once('close', markClosed);
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child.on('message', message => {
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for (const observer of [...observers]) {
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try { observer(message); } catch (error) { fail(error); }
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}
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for (const waiter of [...waiters]) waiter.check(message);
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});
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for (const stream of [child.stdout, child.stderr]) {
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stream.once('close', () => { closedStreams.add(stream); checkClosed(); });
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stream.on('data', data => {
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captured += data.length;
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if (captured > 128 * 1024) { fail(new Error('Fixture output exceeded 128 KiB')); return; }
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if (stream === child.stderr) stderr += data.toString();
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});
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stream.on('error', fail);
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}
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function waitClosed(milliseconds) {
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if (closed) return Promise.resolve(true);
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return new Promise(resolve => {
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let timer;
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const done = value => { clearTimeout(timer); closeWaiters.delete(done); resolve(value); };
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closeWaiters.add(done);
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timer = setTimeout(() => done(false), milliseconds);
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});
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}
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function signalOwned(signal) {
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if (ownedPid === null) return;
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try {
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if (platform === 'win32') { if (!reaped) child.kill(signal); }
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else kill(-ownedPid, signal);
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} catch (error) { if (!error || error.code !== 'ESRCH') throw error; }
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}
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const client = {
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child,
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get diagnostics() { return { closed, reaped, captured, failed }; },
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observe(callback) { observers.add(callback); return () => observers.delete(callback); },
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waitFor(predicate, timeoutMs = 10000) {
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if (failed || reaped) return Promise.reject(failed ? failure : new Error('Fixture already exited'));
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return new Promise((resolve, reject) => {
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let timer;
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const finish = (fn, value) => { clearTimeout(timer); waiters.delete(waiter); fn(value); };
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const waiter = {
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check(message) {
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try { if (predicate(message)) finish(resolve, message); }
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catch (error) { finish(reject, error); }
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},
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reject: error => finish(reject, error),
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};
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waiters.add(waiter);
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timer = setTimeout(() => waiter.reject(new Error(`Fixture response timed out: ${stderr}`)), timeoutMs);
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});
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},
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async completion() {
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if (!await waitClosed(10000)) throw new Error('Fixture completion timed out');
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if (failed) throw failure;
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return { status: exitCode, signal: exitSignal, stderr };
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},
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send(message) {
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try {
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if (!child.connected) throw new Error('Fixture IPC disconnected');
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child.send(message, error => { if (error) fail(error); });
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} catch (error) { fail(error); }
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},
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stop() {
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if (stopPromise) return stopPromise;
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stopPromise = withCleanup(async () => {
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// Disconnect asks the fixture to close normally. If it cannot, escalate
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// only this newly spawned child/group; retain the deadline through close.
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if (child.connected) {
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try { child.disconnect(); } catch (error) { fail(error); }
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}
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if (await waitClosed(300)) {
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if (reaped && (exitCode !== 0 || exitSignal !== null)) {
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throw new Error(`Fixture closed unsuccessfully (${exitCode}, ${exitSignal || 'no signal'}): ${stderr}`);
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}
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return;
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}
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let signalFailed = false;
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let signalError;
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try { signalOwned('SIGTERM'); } catch (error) { signalFailed = true; signalError = error; }
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await new Promise(resolve => setTimeout(resolve, 300));
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try { signalOwned('SIGKILL'); } catch (error) { if (!signalFailed) { signalFailed = true; signalError = error; } }
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if (!await waitClosed(1000)) {
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return withCleanup(() => {
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if (signalFailed) throw signalError;
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throw new Error('Fixture did not close after termination; pipes forcibly closed');
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}, [() => child.stdout.destroy(), () => child.stderr.destroy(), () => waitClosed(100)]);
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}
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if (signalFailed) throw signalError;
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}, [() => {
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for (const waiter of [...waiters]) waiter.reject(new Error('Fixture stopped'));
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observers.clear();
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fs.rmSync(root, { recursive: true, force: true });
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}]).then(() => {
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// A successful close does not erase an earlier IPC/stream/disconnect
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// failure. Report it only after every owned cleanup stage was attempted.
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if (failed) throw failure;
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}, cleanupError => {
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if (failed) throw failure;
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throw cleanupError;
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});
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return stopPromise;
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},
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};
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return client;
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}
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async function withOwnedChildren(count, start, callback) {
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const children = [];
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return withCleanup(async () => {
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for (let index = 0; index < count; index += 1) children.push(await start(index));
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return callback(children);
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}, [() => withCleanup(() => {}, children.map(child => () => child.stop()))]);
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}
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module.exports = { startOwnedChild, withOwnedChildren, withCleanup };
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function runWorker() {
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const { createStateStore } = require('../../../scripts/lib/state-store');
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process.exitCode = 1;
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let store;
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process.on('message', async ({ id, action, dbPath, worker, count = 1 }) => {
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try {
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if (action === 'open') {
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store = await createStateStore({ dbPath });
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} else if (action === 'write') {
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for (let index = 0; index < count; index += 1) {
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store.upsertWorkItem({
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id: `${worker}-${index}`, source: 'manual', title: `Task ${worker}-${index}`, status: 'open'
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});
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}
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} else if (action === 'increment') {
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for (let index = 0; index < count; index += 1) {
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store._database.transaction(() => {
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const item = store.getWorkItemById('counter');
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// Widen real transaction overlap without assuming which worker wins.
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Atomics.wait(new Int32Array(new SharedArrayBuffer(4)), 0, 0, 15);
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store.upsertWorkItem({ ...item, metadata: { value: item.metadata.value + 1 } });
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})();
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}
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} else if (action === 'close') {
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store.close();
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store = null;
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} else {
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throw new Error(`Unknown fixture action: ${action}`);
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}
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if (process.connected) process.send({ id, ok: true });
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} catch (error) {
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if (process.connected) process.send({ id, ok: false, error: error && error.stack ? String(error.stack).slice(0, 4096) : String(error).slice(0, 4096) });
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}
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});
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process.on('disconnect', () => {
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try { if (store) store.close(); process.exitCode = 0; }
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catch (error) { console.error(error); process.exitCode = 1; }
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});
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process.send({ ready: true });
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}
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if (require.main === module) runWorker();
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