test('Finds a free port (no timeout)', function (done) {
		this.timeout(1000 * 10); // higher timeout for this test

		if (process.env['VSCODE_PID']) {
			return done(); // this test fails when run from within VS Code
		}

		// get an initial freeport >= 7000
		ports.findFreePort(7000, 100, 300000).then(initialPort => {
			assert.ok(initialPort >= 7000);

			// create a server to block this port
			const server = net.createServer();
			server.listen(initialPort, void 0, void 0, () => {

				// once listening, find another free port and assert that the port is different from the opened one
				ports.findFreePort(7000, 50, 300000).then(freePort => {
					assert.ok(freePort >= 7000 && freePort !== initialPort);
					server.close();

					done();
				}, err => done(err));
			});
		}, err => done(err));
	});

			server.listen(initialPort, void 0, void 0, () => {

				// once listening, find another free port and assert that the port is different from the opened one
				ports.findFreePort(7000, 50, 300000).then(freePort => {
					assert.ok(freePort >= 7000 && freePort !== initialPort);
					server.close();

					done();
				}, err => done(err));
			});

//.........这里部分代码省略.........
						c(undefined);
					};

					// wait for 1s maximum...
					setTimeout(() => {
						process.stdin.removeListener('data', dataListener);

						c(undefined);
					}, 1000);

					// ...but finish early if we detect data
					process.stdin.once('data', dataListener);
				}));
			}
		}

		// If we are started with --wait create a random temporary file
		// and pass it over to the starting instance. We can use this file
		// to wait for it to be deleted to monitor that the edited file
		// is closed and then exit the waiting process.
		let waitMarkerFilePath: string | undefined;
		if (args.wait) {
			waitMarkerFilePath = await createWaitMarkerFile(verbose);
			if (waitMarkerFilePath) {
				argv.push('--waitMarkerFilePath', waitMarkerFilePath);
			}
		}

		// If we have been started with `--prof-startup` we need to find free ports to profile
		// the main process, the renderer, and the extension host. We also disable v8 cached data
		// to get better profile traces. Last, we listen on stdout for a signal that tells us to
		// stop profiling.
		if (args['prof-startup']) {
			const portMain = await findFreePort(randomPort(), 10, 3000);
			const portRenderer = await findFreePort(portMain + 1, 10, 3000);
			const portExthost = await findFreePort(portRenderer + 1, 10, 3000);

			// fail the operation when one of the ports couldn't be accquired.
			if (portMain * portRenderer * portExthost === 0) {
				throw new Error('Failed to find free ports for profiler. Make sure to shutdown all instances of the editor first.');
			}

			const filenamePrefix = paths.join(os.homedir(), 'prof-' + Math.random().toString(16).slice(-4));

			argv.push(`--inspect-brk=${portMain}`);
			argv.push(`--remote-debugging-port=${portRenderer}`);
			argv.push(`--inspect-brk-extensions=${portExthost}`);
			argv.push(`--prof-startup-prefix`, filenamePrefix);
			argv.push(`--no-cached-data`);

			fs.writeFileSync(filenamePrefix, argv.slice(-6).join('|'));

			processCallbacks.push(async _child => {

				class Profiler {
					static async start(name: string, filenamePrefix: string, opts: { port: number, tries?: number, target?: (targets: Target[]) => Target }) {
						const profiler = await import('v8-inspect-profiler');

						let session: ProfilingSession;
						try {
							session = await profiler.startProfiling(opts);
						} catch (err) {
							console.error(`FAILED to start profiling for '${name}' on port '${opts.port}'`);
						}

						return {

//.........这里部分代码省略.........
			}
		}

		// If we are started with --wait create a random temporary file
		// and pass it over to the starting instance. We can use this file
		// to wait for it to be deleted to monitor that the edited file
		// is closed and then exit the waiting process.
		let waitMarkerFilePath: string;
		if (args.wait) {
			let waitMarkerError: Error;
			const randomTmpFile = paths.join(os.tmpdir(), Math.random().toString(36).replace(/[^a-z]+/g, '').substr(0, 10));
			try {
				fs.writeFileSync(randomTmpFile, '');
				waitMarkerFilePath = randomTmpFile;
				argv.push('--waitMarkerFilePath', waitMarkerFilePath);
			} catch (error) {
				waitMarkerError = error;
			}

			if (verbose) {
				if (waitMarkerError) {
					console.error(`Failed to create marker file for --wait: ${waitMarkerError.toString()}`);
				} else {
					console.log(`Marker file for --wait created: ${waitMarkerFilePath}`);
				}
			}
		}

		// If we have been started with `--prof-startup` we need to find free ports to profile
		// the main process, the renderer, and the extension host. We also disable v8 cached data
		// to get better profile traces. Last, we listen on stdout for a signal that tells us to
		// stop profiling.
		if (args['prof-startup']) {
			const portMain = await findFreePort(9222, 10, 6000);
			const portRenderer = await findFreePort(portMain + 1, 10, 6000);
			const portExthost = await findFreePort(portRenderer + 1, 10, 6000);

			if (!portMain || !portRenderer || !portExthost) {
				console.error('Failed to find free ports for profiler to connect to do.');
				return;
			}

			const filenamePrefix = paths.join(os.homedir(), Math.random().toString(16).slice(-4));

			argv.push(`--inspect-brk=${portMain}`);
			argv.push(`--remote-debugging-port=${portRenderer}`);
			argv.push(`--inspect-brk-extensions=${portExthost}`);
			argv.push(`--prof-startup-prefix`, filenamePrefix);
			argv.push(`--no-cached-data`);

			fs.writeFileSync(filenamePrefix, argv.slice(-6).join('|'));

			processCallbacks.push(async child => {

				// load and start profiler
				const profiler = await import('v8-inspect-profiler');
				const main = await profiler.startProfiling({ port: portMain });
				const renderer = await profiler.startProfiling({ port: portRenderer, tries: 200 });
				const extHost = await profiler.startProfiling({ port: portExthost, tries: 300 });

				// wait for the renderer to delete the
				// marker file
				whenDeleted(filenamePrefix);

				let profileMain = await main.stop();
				let profileRenderer = await renderer.stop();