Fix #59635

src/vs/workbench/api/electron-browser/mainThreadTerminalService.ts

@@ -35,6 +35,7 @@ export class MainThreadTerminalService implements MainThreadTerminalServiceShape
 		this._toDispose.push(terminalService.onInstanceRequestExtHostProcess(request => this._onTerminalRequestExtHostProcess(request)));
 		this._toDispose.push(terminalService.onActiveInstanceChanged(instance => this._onActiveTerminalChanged(instance ? instance.id : undefined)));
 		this._toDispose.push(terminalService.onInstanceTitleChanged(instance => this._onTitleChanged(instance.id, instance.title)));
+		this._toDispose.push(terminalService.onInstanceProcessLaunching(instance => this._onProcessLaunching(instance.id)));
 
 		// Set initial ext host state
 		this.terminalService.terminalInstances.forEach(t => {
@@ -167,6 +168,10 @@ export class MainThreadTerminalService implements MainThreadTerminalServiceShape
 		this._proxy.$acceptTerminalTitleChange(terminalId, name);
 	}
 
+	private _onProcessLaunching(terminalId: number): void {
+		this._proxy.$acceptTerminalProcessLaunching(terminalId);
+	}
+
 	private _onTerminalRendererInput(terminalId: number, data: string): void {
 		this._proxy.$acceptTerminalRendererInput(terminalId, data);
 	}

src/vs/workbench/api/node/extHost.protocol.ts

@@ -884,6 +884,7 @@ export interface ExtHostTerminalServiceShape {
 	$acceptTerminalProcessId(id: number, processId: number): void;
 	$acceptTerminalProcessData(id: number, data: string): void;
 	$acceptTerminalRendererInput(id: number, data: string): void;
+	$acceptTerminalProcessLaunching(id: number): void;
 	$acceptTerminalTitleChange(id: number, name: string): void;
 	$acceptTerminalRendererDimensions(id: number, cols: number, rows: number): void;
 	$createProcess(id: number, shellLaunchConfig: ShellLaunchConfigDto, cols: number, rows: number): void;

src/vs/workbench/api/node/extHostTerminalService.ts

@@ -90,13 +90,7 @@ export class ExtHostTerminal extends BaseExtHostTerminal implements vscode.Termi
 		pid?: number
 	) {
 		super(proxy, id);
-		this._pidPromise = new Promise<number>(c => {
-			if (pid === RENDERER_NO_PROCESS_ID) {
-				c(undefined);
-			} else {
-				this._pidPromiseComplete = c;
-			}
-		});
+		this._createProcessIdPromise(pid);
 	}
 
 	public create(
@@ -138,6 +132,16 @@ export class ExtHostTerminal extends BaseExtHostTerminal implements vscode.Termi
 		this._queueApiRequest(this._proxy.$hide, []);
 	}
 
+	public _createProcessIdPromise(pid?: number): void {
+		this._pidPromise = new Promise<number>(c => {
+			if (pid === RENDERER_NO_PROCESS_ID) {
+				c(undefined);
+			} else {
+				this._pidPromiseComplete = c;
+			}
+		});
+	}
+
 	public _setProcessId(processId: number): void {
 		// The event may fire 2 times when the panel is restored
 		if (this._pidPromiseComplete) {
@@ -350,6 +354,10 @@ export class ExtHostTerminalService implements ExtHostTerminalServiceShape {
 		this._performTerminalIdAction(id, terminal => terminal._setProcessId(processId));
 	}
 
+	public $acceptTerminalProcessLaunching(id: number): void {
+		this._performTerminalIdAction(id, terminal => terminal._createProcessIdPromise());
+	}
+
 	private _performTerminalIdAction(id: number, callback: (terminal: ExtHostTerminal) => void): void {
 		let terminal = this._getTerminalById(id);
 		if (terminal) {

src/vs/workbench/parts/terminal/common/terminal.ts

@@ -184,6 +184,7 @@ export interface ITerminalService {
 	onTabDisposed: Event<ITerminalTab>;
 	onInstanceCreated: Event<ITerminalInstance>;
 	onInstanceDisposed: Event<ITerminalInstance>;
+	onInstanceProcessLaunching: Event<ITerminalInstance>;
 	onInstanceProcessIdReady: Event<ITerminalInstance>;
 	onInstanceDimensionsChanged: Event<ITerminalInstance>;
 	onInstanceRequestExtHostProcess: Event<ITerminalProcessExtHostRequest>;
@@ -319,6 +320,8 @@ export interface ITerminalInstance {
 
 	onFocused: Event<ITerminalInstance>;
 
+	onProcessLaunching: Event<ITerminalInstance>;
+
 	onProcessIdReady: Event<ITerminalInstance>;
 
 	onRequestExtHostProcess: Event<ITerminalInstance>;

src/vs/workbench/parts/terminal/common/terminalService.ts

@@ -45,6 +45,8 @@ export abstract class TerminalService implements ITerminalService {
 	public get onInstancesChanged(): Event<void> { return this._onInstancesChanged.event; }
 	protected readonly _onInstanceTitleChanged: Emitter<ITerminalInstance> = new Emitter<ITerminalInstance>();
 	public get onInstanceTitleChanged(): Event<ITerminalInstance> { return this._onInstanceTitleChanged.event; }
+	protected readonly _onInstanceProcessLaunching: Emitter<ITerminalInstance> = new Emitter<ITerminalInstance>();
+	public get onInstanceProcessLaunching(): Event<ITerminalInstance> { return this._onInstanceProcessLaunching.event; }
 	protected readonly _onActiveInstanceChanged: Emitter<ITerminalInstance> = new Emitter<ITerminalInstance>();
 	public get onActiveInstanceChanged(): Event<ITerminalInstance> { return this._onActiveInstanceChanged.event; }
 	protected readonly _onTabDisposed: Emitter<ITerminalTab> = new Emitter<ITerminalTab>();
@@ -278,6 +280,7 @@ export abstract class TerminalService implements ITerminalService {
 		instance.addDisposable(instance.onTitleChanged(this._onInstanceTitleChanged.fire, this._onInstanceTitleChanged));
 		instance.addDisposable(instance.onProcessIdReady(this._onInstanceProcessIdReady.fire, this._onInstanceProcessIdReady));
 		instance.addDisposable(instance.onDimensionsChanged(() => this._onInstanceDimensionsChanged.fire(instance)));
+		instance.addDisposable(instance.onProcessLaunching(() => this._onInstanceProcessLaunching.fire(instance)));
 		instance.addDisposable(instance.onFocus(this._onActiveInstanceChanged.fire, this._onActiveInstanceChanged));
 	}
 

src/vs/workbench/parts/terminal/electron-browser/terminalInstance.ts

@@ -102,6 +102,8 @@ export class TerminalInstance implements ITerminalInstance {
 	public get onProcessIdReady(): Event<ITerminalInstance> { return this._onProcessIdReady.event; }
 	private readonly _onTitleChanged: Emitter<ITerminalInstance> = new Emitter<ITerminalInstance>();
 	public get onTitleChanged(): Event<ITerminalInstance> { return this._onTitleChanged.event; }
+	private readonly _onProcessLaunching: Emitter<ITerminalInstance> = new Emitter<ITerminalInstance>();
+	public get onProcessLaunching(): Event<ITerminalInstance> { return this._onProcessLaunching.event; }
 	private readonly _onData: Emitter<string> = new Emitter<string>();
 	public get onData(): Event<string> { return this._onData.event; }
 	private readonly _onLineData: Emitter<string> = new Emitter<string>();
@@ -772,6 +774,8 @@ export class TerminalInstance implements ITerminalInstance {
 		this._processManager.onProcessExit(exitCode => this._onProcessExit(exitCode));
 		this._processManager.onProcessData(data => this._onData.fire(data));
 
+		this._onProcessLaunching.fire(this);
+
 		if (this._shellLaunchConfig.name) {
 			this.setTitle(this._shellLaunchConfig.name, false);
 		} else {