Add stopAllThreadsOnSuspend and steppingResumesAllThreads to the laun…

package.json

@@ -355,6 +355,16 @@
                                 "description": "Show return value of functions when stepping.",
                                 "type": "boolean"
                             },
+                            "steppingResumesAllThreads": {
+                                "default": true,
+                                "description": "If true, all threads are resumed while stepping. If false, only the thread being stepped is resumed.",
+                                "type": "boolean"
+                            },
+                            "stopAllThreadsOnSuspend": {
+                                "default": true,
+                                "description": "If true, all threads are suspended when a breakpoint is hit or the program is paused. If false, only the thread that triggered the stop is suspended.",
+                                "type": "boolean"
+                            },
                             "subProcess": {
                                 "default": false,
                                 "description": "Whether to enable Sub Process debugging",
@@ -633,6 +643,16 @@
                                 "description": "Show return value of functions when stepping.",
                                 "type": "boolean"
                             },
+                            "steppingResumesAllThreads": {
+                                "default": true,
+                                "description": "If true, all threads are resumed while stepping. If false, only the thread being stepped is resumed.",
+                                "type": "boolean"
+                            },
+                            "stopAllThreadsOnSuspend": {
+                                "default": true,
+                                "description": "If true, all threads are suspended when a breakpoint is hit or the program is paused. If false, only the thread that triggered the stop is suspended.",
+                                "type": "boolean"
+                            },
                             "stopOnEntry": {
                                 "default": false,
                                 "description": "Automatically stop after launch.",

src/extension/types.ts

@@ -73,6 +73,10 @@ interface ICommonDebugArguments {
     host?: string;
     // Show return values of functions while stepping.
     showReturnValue?: boolean;
+    // Resume all threads (true, the default) or only the stepping thread (false) during a step.
+    steppingResumesAllThreads?: boolean;
+    // Suspend all threads (true, the default) or only the stopping thread (false) on a breakpoint or pause.
+    stopAllThreadsOnSuspend?: boolean;
     subProcess?: boolean;
     // SystemExit codes (and/or inclusive ranges) that cause the debugger to break.
     // An empty array disables breaking on SystemExit entirely.

src/test/unittest/launchJsonSchema.unit.test.ts

@@ -0,0 +1,29 @@
+// Copyright (c) Microsoft Corporation. All rights reserved.
+// Licensed under the MIT License.
+
+'use strict';
+
+import { expect } from 'chai';
+import * as fs from 'fs';
+import * as path from 'path';
+
+suite('Debugging - launch.json schema', () => {
+    const packageJsonPath = path.resolve(__dirname, '..', '..', '..', 'package.json');
+    const packageJson = JSON.parse(fs.readFileSync(packageJsonPath, 'utf8'));
+    const debuggerContribution = packageJson.contributes.debuggers.find((d: { type: string }) => d.type === 'debugpy');
+
+    ['launch', 'attach'].forEach((request) => {
+        suite(`${request} configuration`, () => {
+            const properties = debuggerContribution.configurationAttributes[request].properties;
+
+            ['steppingResumesAllThreads', 'stopAllThreadsOnSuspend'].forEach((option) => {
+                test(`${option} is declared as a boolean that defaults to true`, () => {
+                    expect(properties).to.have.property(option);
+                    expect(properties[option].type).to.equal('boolean');
+                    expect(properties[option].default).to.equal(true);
+                    expect(properties[option].description).to.be.a('string').that.is.not.empty;
+                });
+            });
+        });
+    });
+});