From d704af2501168126f6979b2ac784d59d84b3fc98 Mon Sep 17 00:00:00 2001
From: WebFreak001 <janju007@web.de>
Date: Sun, 10 Jul 2016 16:34:12 +0200
Subject: [PATCH] Implemented stepping back & changing variables

---
 package.json           | 11 +++++------
 src/backend/backend.ts |  1 +
 src/backend/mi2/mi2.ts | 20 ++++++++++++--------
 src/gdb.ts             |  2 ++
 src/mibase.ts          | 19 +++++++++++++++++++
 5 files changed, 39 insertions(+), 14 deletions(-)

diff --git a/package.json b/package.json
index 1033ced..a45703e 100644
--- a/package.json
+++ b/package.json
@@ -6,7 +6,7 @@
 	"publisher": "webfreak",
 	"icon": "images/icon-plain.svg",
 	"engines": {
-		"vscode": "^0.10.8"
+		"vscode": "^1.3.0"
 	},
 	"categories": [
 		"Debuggers"
@@ -463,12 +463,11 @@
 		"test": "node ./node_modules/vscode/bin/test"
 	},
 	"dependencies": {
-		"vscode-debugadapter": "^1.7.0-pre.1",
-		"vscode-debugprotocol": "^1.7.0-pre.1",
-		"ssh2": "^0.4.13"
+		"vscode-debugadapter": "^1.10.0",
+		"vscode-debugprotocol": "^1.10.0",
+		"ssh2": "^0.5.0"
 	},
 	"devDependencies": {
-		"typescript": "^1.7.5",
-		"vscode": "0.11.x"
+		"typescript": "^1.8.10"
 	}
 }
diff --git a/src/backend/backend.ts b/src/backend/backend.ts
index 7df1175..532b6cb 100644
--- a/src/backend/backend.ts
+++ b/src/backend/backend.ts
@@ -49,4 +49,5 @@ export interface IBackend {
 	getStackVariables(thread: number, frame: number): Thenable<[string, string][]>;
 	evalExpression(name: string): Thenable<any>;
 	isReady(): boolean;
+	changeVariable(name: string, rawValue: string): Thenable<any>;
 }
\ No newline at end of file
diff --git a/src/backend/mi2/mi2.ts b/src/backend/mi2/mi2.ts
index 5b5d34e..f0343cc 100644
--- a/src/backend/mi2/mi2.ts
+++ b/src/backend/mi2/mi2.ts
@@ -387,38 +387,42 @@ export class MI2 extends EventEmitter implements IBackend {
 		});
 	}
 
-	continue(): Thenable<boolean> {
+	continue(reverse: boolean = false): Thenable<boolean> {
 		return new Promise((resolve, reject) => {
-			this.sendCommand("exec-continue").then((info) => {
+			this.sendCommand("exec-continue" + (reverse ? " --reverse" : "")).then((info) => {
 				resolve(info.resultRecords.resultClass == "running");
 			}, reject);
 		});
 	}
 
-	next(): Thenable<boolean> {
+	next(reverse: boolean = false): Thenable<boolean> {
 		return new Promise((resolve, reject) => {
-			this.sendCommand("exec-next").then((info) => {
+			this.sendCommand("exec-next" + (reverse ? " --reverse" : "")).then((info) => {
 				resolve(info.resultRecords.resultClass == "running");
 			}, reject);
 		});
 	}
 
-	step(): Thenable<boolean> {
+	step(reverse: boolean = false): Thenable<boolean> {
 		return new Promise((resolve, reject) => {
-			this.sendCommand("exec-step").then((info) => {
+			this.sendCommand("exec-step" + (reverse ? " --reverse" : "")).then((info) => {
 				resolve(info.resultRecords.resultClass == "running");
 			}, reject);
 		});
 	}
 
-	stepOut(): Thenable<boolean> {
+	stepOut(reverse: boolean = false): Thenable<boolean> {
 		return new Promise((resolve, reject) => {
-			this.sendCommand("exec-finish").then((info) => {
+			this.sendCommand("exec-finish" + (reverse ? " --reverse" : "")).then((info) => {
 				resolve(info.resultRecords.resultClass == "running");
 			}, reject);
 		});
 	}
 
+	changeVariable(name: string, rawValue: string): Thenable<any> {
+		return this.sendCommand("gdb-set var " + name + "=" + rawValue);
+	}
+
 	loadBreakPoints(breakpoints: Breakpoint[]): Thenable<[boolean, Breakpoint][]> {
 		let promisses = [];
 		breakpoints.forEach(breakpoint => {
diff --git a/src/gdb.ts b/src/gdb.ts
index b588234..c84616c 100644
--- a/src/gdb.ts
+++ b/src/gdb.ts
@@ -31,6 +31,8 @@ class GDBDebugSession extends MI2DebugSession {
 		response.body.supportsConditionalBreakpoints = true;
 		response.body.supportsFunctionBreakpoints = true;
 		response.body.supportsEvaluateForHovers = true;
+		response.body.supportsSetVariable = true;
+		response.body.supportsStepBack = true;
 		this.sendResponse(response);
 	}
 
diff --git a/src/mibase.ts b/src/mibase.ts
index dab5036..ba745bc 100644
--- a/src/mibase.ts
+++ b/src/mibase.ts
@@ -81,6 +81,17 @@ export class MI2DebugSession extends DebugSession {
 		this.sendResponse(response);
 	}
 
+	protected setVariableRequest(response: DebugProtocol.SetVariableResponse, args: DebugProtocol.SetVariableArguments): void {
+		this.miDebugger.changeVariable(args.name, args.value).then(() => {
+			response.body = {
+				value: args.value
+			};
+			this.sendResponse(response);
+		}, err => {
+				this.sendErrorResponse(response, 11, `Could not continue: ${err}`);
+		});
+	}
+
 	protected setFunctionBreakPointsRequest(response: DebugProtocol.SetFunctionBreakpointsResponse, args: DebugProtocol.SetFunctionBreakpointsArguments): void {
 		let cb = (() => {
 			this.debugReady = true;
@@ -290,6 +301,14 @@ export class MI2DebugSession extends DebugSession {
 		});
 	}
 
+	protected stepBackRequest(response: DebugProtocol.StepBackResponse, args: DebugProtocol.StepBackArguments): void {
+		this.miDebugger.step(true).then(done => {
+			this.sendResponse(response);
+		}, msg => {
+			this.sendErrorResponse(response, 4, `Could not step back: ${msg} - Try running 'target record-full' before stepping back`);
+		});
+	}
+
 	protected stepInRequest(response: DebugProtocol.NextResponse, args: DebugProtocol.NextArguments): void {
 		this.miDebugger.step().then(done => {
 			this.sendResponse(response);