Issue Marus#306, support more than 20 stack frames

CHANGELOG.md

@@ -7,6 +7,7 @@ Minor bug fix release
 2. Issues Fixed
    * Fixed Issue [#273](https://github.com/Marus/cortex-debug/issues/273). Handle peripherals blocks with no addressBlocks. Also fix issue with multiple address blocks where only the first one was being used
    * Fixed Issue [#284](https://github.com/Marus/cortex-debug/issues/284). Implement/support 'derivedFrom' at register level.
+   * Fixed Issue [#306](https://github.com/Marus/cortex-debug/issues/306). Support displaying more than 20 stack frames
    * When runToMain was enabled there were 1-2 harmless popups when the program stopped in main. They were very frequent on Windows, less frequent on Linux and very rare if any on a Mac.
 
 # V0.3.6

src/backend/mi2/mi2.ts

@@ -456,6 +456,19 @@ export class MI2 extends EventEmitter implements IBackend {
         });
     }
 
+    public getStackDepth(threadId: number): Thenable<number> {
+        if (trace) {
+            this.log('stderr', 'getStackDepth');
+        }
+        return new Promise((resolve, reject) => {
+            this.sendCommand(`stack-info-depth --thread ${threadId} 10000`).then((result) => {
+                const depth = result.result('depth');
+                const ret = parseInt(depth);
+                resolve(ret);
+            }, reject);
+        });
+    }
+
     public getStack(threadId: number, startLevel: number, maxLevels: number): Thenable<Stack[]> {
         if (trace) {
             this.log('stderr', 'getStack');

src/gdb.ts

@@ -1304,7 +1304,9 @@ export class GDBDebugSession extends DebugSession {
 
     protected async stackTraceRequest(response: DebugProtocol.StackTraceResponse, args: DebugProtocol.StackTraceArguments): Promise<void> {
         try {
-            const stack = await this.miDebugger.getStack(args.threadId, args.startFrame, args.levels);
+            const maxDepth = await this.miDebugger.getStackDepth(args.threadId);
+            const highFrame = Math.min(maxDepth, args.startFrame + args.levels) - 1;
+            const stack = await this.miDebugger.getStack(args.threadId, args.startFrame, highFrame);
             const ret: StackFrame[] = [];
             for (const element of stack) {
                 const stackId = GDBDebugSession.encodeReference(args.threadId, element.level);
@@ -1359,7 +1361,8 @@ export class GDBDebugSession extends DebugSession {
             }
 
             response.body = {
-                stackFrames: ret
+                stackFrames: ret,
+                totalFrames: maxDepth
             };
             this.sendResponse(response);
         }