Debugger: Make LldbEngine stack handling more similar to GdbEngine

This also addresses the remaining issues of QTCREATORBUG-13803.

Task-number: QTCREATORBUG-13803
Change-Id: Iceb123279236d98961d15fe7421acc7c10d1b1c7
Reviewed-by: Christian Stenger <christian.stenger@theqtcompany.com>
Reviewed-by: Eike Ziller <eike.ziller@theqtcompany.com>

share/qtcreator/debugger/lldbbridge.py

@@ -893,20 +893,6 @@ class Dumper(DumperBase):
         if "continuation" in args:
             self.report('continuation=\"%s\"' % args["continuation"])
 
-    def reportStackPosition(self):
-        thread = self.currentThread()
-        if not thread:
-            self.report('msg="No thread"')
-            return
-        frame = thread.GetSelectedFrame()
-        if frame:
-            self.report('stack-position={id="%s"}' % frame.GetFrameID())
-        else:
-            self.report('stack-position={id="-1"}')
-
-    def reportStackTop(self):
-        self.report('stack-top={}')
-
     def extractBlob(self, base, size):
         if size == 0:
             return Blob("")
@@ -1220,7 +1206,6 @@ class Dumper(DumperBase):
         else:
             state = self.process.GetState()
             if state == lldb.eStateStopped:
-                self.reportStackPosition()
                 self.reportThreads()
                 self.reportVariables()
 
@@ -1340,7 +1325,6 @@ class Dumper(DumperBase):
                 stoppedThread = self.firstStoppedThread()
                 if stoppedThread:
                     self.process.SetSelectedThread(stoppedThread)
-                self.reportStackTop()
                 self.reportThreads()
                 if stoppedThread:
                     self.reportLocation(stoppedThread.GetSelectedFrame())
@@ -1605,9 +1589,7 @@ class Dumper(DumperBase):
     def activateFrame(self, args):
         thread = args['thread']
         self.currentThread().SetSelectedFrame(args['index'])
-        state = self.process.GetState()
-        if state == lldb.eStateStopped:
-            self.reportStackPosition()
+        self.reportContinuation(args)
 
     def selectThread(self, args):
         self.process.SetSelectedThreadByID(args['id'])

src/plugins/debugger/lldb/lldbengine.cpp

@@ -434,10 +434,6 @@ void LldbEngine::handleResponse(const QByteArray &response)
             watchHandler()->addDumpers(item);
         else if (name == "stack")
             refreshStack(item);
-        else if (name == "stack-position")
-            refreshStackPosition(item);
-        else if (name == "stack-top")
-            refreshStackTop(item);
         else if (name == "registers")
             refreshRegisters(item);
         else if (name == "threads")
@@ -526,11 +522,12 @@ void LldbEngine::executeJumpToLine(const ContextData &data)
 
 void LldbEngine::activateFrame(int frameIndex)
 {
-    resetLocation();
     if (state() != InferiorStopOk && state() != InferiorUnrunnable)
         return;
 
-    const int n = stackHandler()->stackSize();
+    StackHandler *handler = stackHandler();
+
+    const int n = handler->stackSize();
     if (frameIndex == n) {
         DebuggerCommand cmd("reportStack");
         cmd.arg("nativeMixed", isNativeMixedActive());
@@ -539,6 +536,10 @@ void LldbEngine::activateFrame(int frameIndex)
         return;
     }
 
+    QTC_ASSERT(frameIndex < handler->stackSize(), return);
+    handler->setCurrentIndex(frameIndex);
+    gotoLocation(handler->currentFrame());
+
     DebuggerCommand cmd("activateFrame");
     cmd.arg("index", frameIndex);
     cmd.arg("thread", threadsHandler()->currentThread().raw());
@@ -786,11 +787,6 @@ void LldbEngine::refreshSymbols(const GdbMi &symbols)
 //
 //////////////////////////////////////////////////////////////////////
 
-void LldbEngine::resetLocation()
-{
-    DebuggerEngine::resetLocation();
-}
-
 bool LldbEngine::setToolTipExpression(TextEditor::TextEditorWidget *editorWidget, const DebuggerToolTipContext &context)
 {
     if (state() != InferiorStopOk || !isCppEditor(editorWidget)) {
@@ -1030,25 +1026,6 @@ void LldbEngine::refreshStack(const GdbMi &stack)
     handler->setFrames(frames, canExpand);
 }
 
-void LldbEngine::refreshStackPosition(const GdbMi &position)
-{
-    setStackPosition(position["id"].toInt());
-}
-
-void LldbEngine::refreshStackTop(const GdbMi &)
-{
-    setStackPosition(stackHandler()->firstUsableIndex());
-}
-
-void LldbEngine::setStackPosition(int index)
-{
-    StackHandler *handler = stackHandler();
-    handler->setFrames(handler->frames());
-    handler->setCurrentIndex(index);
-    if (index >= 0 && index < handler->stackSize())
-        gotoLocation(handler->frameAt(index));
-}
-
 void LldbEngine::refreshRegisters(const GdbMi &registers)
 {
     RegisterHandler *handler = registerHandler();

src/plugins/debugger/lldb/lldbengine.h

@@ -81,7 +81,6 @@ private:
     void shutdownInferior();
     void shutdownEngine();
     void abortDebugger();
-    void resetLocation();
 
     bool setToolTipExpression(TextEditor::TextEditorWidget *editorWidget,
         const DebuggerToolTipContext &);
@@ -147,9 +146,6 @@ private:
     void refreshAll(const GdbMi &all);
     void refreshThreads(const GdbMi &threads);
     void refreshStack(const GdbMi &stack);
-    void refreshStackPosition(const GdbMi &position);
-    void refreshStackTop(const GdbMi &position);
-    void setStackPosition(int index);
     void refreshRegisters(const GdbMi &registers);
     void refreshLocals(const GdbMi &vars);
     void refreshTypeInfo(const GdbMi &typeInfo);