Added special commands for extended-remote fix WebFreak001#91

Author: WebFreak001

package.json

@@ -365,6 +365,24 @@
 								"x11port": 6000
 							}
 						}
+					},
+					{
+						"label": "GDB: Debug external embedded device",
+						"description": "Debugs an embedded microcontroller supported by GDB by attaching over extended-remote",
+						"body": {
+							"type": "gdb",
+							"request": "launch",
+							"name": "${6:Debug Microcontroller}",
+							"target": "extended-remote ${2:/dev/cu.usbmodem00000000}",
+							"executable": "${1:./bin/executable.elf}",
+							"cwd": "^\"\\${workspaceRoot}\"",
+							"autorun": [
+								"monitor tpwr enable",
+								"monitor swdp_scan",
+								"attach 1",
+								"load ${1:./bin/executable.elf}"
+							]
+						}
 					}
 				]
 			},

src/backend/mi2/mi2.ts

@@ -186,15 +186,25 @@ export class MI2 extends EventEmitter implements IBackend {
 				executable = nativePath.join(cwd, executable);
 			if (!executable)
 				executable = "-p";
-			args = args.concat([executable, target], this.preargs);
+			var isExtendedRemote = false;
+			if (target.startsWith("extended-remote")) {
+				isExtendedRemote = true;
+				args = this.preargs;
+			} else
+				args = args.concat([executable, target], this.preargs);
 			this.process = ChildProcess.spawn(this.application, args, { cwd: cwd });
 			this.process.stdout.on("data", this.stdout.bind(this));
 			this.process.stderr.on("data", this.stderr.bind(this));
 			this.process.on("exit", (() => { this.emit("quit"); }).bind(this));
-			Promise.all([
+			var commands = [
 				this.sendCommand("gdb-set target-async on"),
 				this.sendCommand("environment-directory \"" + escape(cwd) + "\"")
-			]).then(() => {
+			];
+			if (isExtendedRemote) {
+				commands.push(this.sendCommand("target-select " + target));
+				commands.push(this.sendCommand("file-symbol-file \"" + escape(executable) + "\""));
+			}
+			Promise.all(commands).then(() => {
 				this.emit("debug-ready")
 				resolve();
 			}, reject);