diff --git a/src/vs/workbench/api/common/extHostTerminalService.ts b/src/vs/workbench/api/common/extHostTerminalService.ts
index 01c4ece2795b326cd1ffa57b3b63ba28e9c805f5..d722f2b428ed2da34a572b04629560d1833d0af3 100644
--- a/src/vs/workbench/api/common/extHostTerminalService.ts
+++ b/src/vs/workbench/api/common/extHostTerminalService.ts
@@ -13,7 +13,7 @@ import { ITerminalChildProcess, ITerminalDimensions, EXT_HOST_CREATION_DELAY, IT
 import { timeout } from 'vs/base/common/async';
 import { IExtHostRpcService } from 'vs/workbench/api/common/extHostRpcService';
 import { TerminalDataBufferer } from 'vs/workbench/contrib/terminal/common/terminalDataBuffering';
-import { IDisposable, DisposableStore } from 'vs/base/common/lifecycle';
+import { IDisposable, DisposableStore, Disposable } from 'vs/base/common/lifecycle';
 import { Disposable as VSCodeDisposable, EnvironmentVariableMutatorType } from './extHostTypes';
 import { IExtensionDescription } from 'vs/platform/extensions/common/extensions';
 import { ISerializableEnvironmentVariableCollection } from 'vs/workbench/contrib/terminal/common/environmentVariable';
@@ -22,7 +22,7 @@ import { NotSupportedError } from 'vs/base/common/errors';
 import { serializeEnvironmentVariableCollection } from 'vs/workbench/contrib/terminal/common/environmentVariableShared';
 import { CancellationTokenSource } from 'vs/base/common/cancellation';
 
-export interface IExtHostTerminalService extends ExtHostTerminalServiceShape {
+export interface IExtHostTerminalService extends ExtHostTerminalServiceShape, IDisposable {
 
 	readonly _serviceBrand: undefined;
 
@@ -306,14 +306,14 @@ interface ICachedLinkEntry {
 	link: vscode.TerminalLink;
 }
 
-export abstract class BaseExtHostTerminalService implements IExtHostTerminalService, ExtHostTerminalServiceShape {
+export abstract class BaseExtHostTerminalService extends Disposable implements IExtHostTerminalService, ExtHostTerminalServiceShape {
 
 	readonly _serviceBrand: undefined;
 
 	protected _proxy: MainThreadTerminalServiceShape;
 	protected _activeTerminal: ExtHostTerminal | undefined;
 	protected _terminals: ExtHostTerminal[] = [];
-	protected _terminalProcesses: { [id: number]: ITerminalChildProcess } = {};
+	protected _terminalProcesses: Map<number, ITerminalChildProcess> = new Map();
 	protected _terminalProcessDisposables: { [id: number]: IDisposable } = {};
 	protected _extensionTerminalAwaitingStart: { [id: number]: { initialDimensions: ITerminalDimensionsDto | undefined } | undefined } = {};
 	protected _getTerminalPromises: { [id: number]: Promise<ExtHostTerminal | undefined> } = {};
@@ -342,6 +342,7 @@ export abstract class BaseExtHostTerminalService implements IExtHostTerminalServ
 		supportsProcesses: boolean,
 		@IExtHostRpcService extHostRpc: IExtHostRpcService
 	) {
+		super();
 		this._proxy = extHostRpc.getProxy(MainContext.MainThreadTerminalService);
 		this._bufferer = new TerminalDataBufferer(this._proxy.$sendProcessData);
 		this._onDidWriteTerminalData = new Emitter<vscode.TerminalDataWriteEvent>({
@@ -349,6 +350,13 @@ export abstract class BaseExtHostTerminalService implements IExtHostTerminalServ
 			onLastListenerRemove: () => this._proxy.$stopSendingDataEvents()
 		});
 		this._proxy.$registerProcessSupport(supportsProcesses);
+		this._register({
+			dispose: () => {
+				for (const [_, terminalProcess] of this._terminalProcesses) {
+					terminalProcess.shutdown(true);
+				}
+			}
+		});
 	}
 
 	public abstract createTerminal(name?: string, shellPath?: string, shellArgs?: string[] | string): vscode.Terminal;
@@ -421,11 +429,9 @@ export abstract class BaseExtHostTerminalService implements IExtHostTerminalServ
 	public async $acceptTerminalMaximumDimensions(id: number, cols: number, rows: number): Promise<void> {
 		await this._getTerminalByIdEventually(id);
 
-		if (this._terminalProcesses[id]) {
-			// Extension pty terminal only - when virtual process resize fires it means that the
-			// terminal's maximum dimensions changed
-			this._terminalProcesses[id]?.resize(cols, rows);
-		}
+		// Extension pty terminal only - when virtual process resize fires it means that the
+		// terminal's maximum dimensions changed
+		this._terminalProcesses.get(id)?.resize(cols, rows);
 	}
 
 	public async $acceptTerminalTitleChange(id: number, name: string): Promise<void> {
@@ -497,8 +503,9 @@ export abstract class BaseExtHostTerminalService implements IExtHostTerminalServ
 			});
 		}
 
-		if (this._terminalProcesses[id]) {
-			(this._terminalProcesses[id] as ExtHostPseudoterminal).startSendingEvents(initialDimensions);
+		const terminalProcess = this._terminalProcesses.get(id);
+		if (terminalProcess) {
+			(terminalProcess as ExtHostPseudoterminal).startSendingEvents(initialDimensions);
 		} else {
 			// Defer startSendingEvents call to when _setupExtHostProcessListeners is called
 			this._extensionTerminalAwaitingStart[id] = { initialDimensions };
@@ -520,7 +527,7 @@ export abstract class BaseExtHostTerminalService implements IExtHostTerminalServ
 		if (p.onProcessOverrideDimensions) {
 			disposables.add(p.onProcessOverrideDimensions(e => this._proxy.$sendOverrideDimensions(id, e)));
 		}
-		this._terminalProcesses[id] = p;
+		this._terminalProcesses.set(id, p);
 
 		const awaitingStart = this._extensionTerminalAwaitingStart[id];
 		if (awaitingStart && p instanceof ExtHostPseudoterminal) {
@@ -532,12 +539,12 @@ export abstract class BaseExtHostTerminalService implements IExtHostTerminalServ
 	}
 
 	public $acceptProcessInput(id: number, data: string): void {
-		this._terminalProcesses[id]?.input(data);
+		this._terminalProcesses.get(id)?.input(data);
 	}
 
 	public $acceptProcessResize(id: number, cols: number, rows: number): void {
 		try {
-			this._terminalProcesses[id]?.resize(cols, rows);
+			this._terminalProcesses.get(id)?.resize(cols, rows);
 		} catch (error) {
 			// We tried to write to a closed pipe / channel.
 			if (error.code !== 'EPIPE' && error.code !== 'ERR_IPC_CHANNEL_CLOSED') {
@@ -547,15 +554,15 @@ export abstract class BaseExtHostTerminalService implements IExtHostTerminalServ
 	}
 
 	public $acceptProcessShutdown(id: number, immediate: boolean): void {
-		this._terminalProcesses[id]?.shutdown(immediate);
+		this._terminalProcesses.get(id)?.shutdown(immediate);
 	}
 
 	public $acceptProcessRequestInitialCwd(id: number): void {
-		this._terminalProcesses[id]?.getInitialCwd().then(initialCwd => this._proxy.$sendProcessInitialCwd(id, initialCwd));
+		this._terminalProcesses.get(id)?.getInitialCwd().then(initialCwd => this._proxy.$sendProcessInitialCwd(id, initialCwd));
 	}
 
 	public $acceptProcessRequestCwd(id: number): void {
-		this._terminalProcesses[id]?.getCwd().then(cwd => this._proxy.$sendProcessCwd(id, cwd));
+		this._terminalProcesses.get(id)?.getCwd().then(cwd => this._proxy.$sendProcessCwd(id, cwd));
 	}
 
 	public $acceptProcessRequestLatency(id: number): number {
@@ -648,7 +655,7 @@ export abstract class BaseExtHostTerminalService implements IExtHostTerminalServ
 		this._bufferer.stopBuffering(id);
 
 		// Remove process reference
-		delete this._terminalProcesses[id];
+		this._terminalProcesses.delete(id);
 		delete this._extensionTerminalAwaitingStart[id];
 
 		// Clean up process disposables
diff --git a/src/vs/workbench/services/extensions/common/extensionHostMain.ts b/src/vs/workbench/services/extensions/common/extensionHostMain.ts
index 552e08e19171fedf51d09bffc481b5bb77cf5120..e6b9d6fcb17460a191e363f74b18f00b74fe45e4 100644
--- a/src/vs/workbench/services/extensions/common/extensionHostMain.ts
+++ b/src/vs/workbench/services/extensions/common/extensionHostMain.ts
@@ -21,6 +21,7 @@ import { IInstantiationService } from 'vs/platform/instantiation/common/instanti
 import { IExtHostRpcService, ExtHostRpcService } from 'vs/workbench/api/common/extHostRpcService';
 import { IURITransformerService, URITransformerService } from 'vs/workbench/api/common/extHostUriTransformerService';
 import { IExtHostExtensionService, IHostUtils } from 'vs/workbench/api/common/extHostExtensionService';
+import { IExtHostTerminalService } from 'vs/workbench/api/common/extHostTerminalService';
 
 export interface IExitFn {
 	(code?: number): any;
@@ -61,6 +62,9 @@ export class ExtensionHostMain {
 
 		// todo@joh
 		// ugly self - inject
+		const terminalService = instaService.invokeFunction(accessor => accessor.get(IExtHostTerminalService));
+		this._disposables.add(terminalService);
+
 		const logService = instaService.invokeFunction(accessor => accessor.get(ILogService));
 		this._disposables.add(logService);