Debugger: Combine the EngineShutdown{Ok,Failed} states

... into a EngineShutdownFinished. They were never handled differently,
and the only option is to proceed to DebuggerFinished anyway. So
simplify the state machine a bit.

Change-Id: Ied3be86fff6750abca578dc6788e4be1d895692b
Reviewed-by: David Schulz <david.schulz@qt.io>

share/qtcreator/debugger/lldbbridge.py

@@ -1521,7 +1521,7 @@ class Dumper(DumperBase):
         self.reportResult('', args)
 
     def quit(self, args):
-        self.reportState('engineshutdownok')
+        self.reportState('engineshutdownfinished')
         self.process.Kill()
         self.reportResult('', args)
 

src/plugins/debugger/cdb/cdbengine.cpp

@@ -722,7 +722,7 @@ void CdbEngine::shutdownEngine()
 
     if (!isCdbProcessRunning()) { // Direct launch: Terminated with process.
         STATE_DEBUG(state(), Q_FUNC_INFO, __LINE__, "notifyEngineShutdownOk")
-        notifyEngineShutdownOk();
+        notifyEngineShutdownFinished();
         return;
     }
 

src/plugins/debugger/debuggerconstants.h

@@ -99,8 +99,7 @@ enum DebuggerState
     InferiorShutdownOk,
 
     EngineShutdownRequested,
-    EngineShutdownFailed,
-    EngineShutdownOk,
+    EngineShutdownFinished,
 
     DebuggerFinished
 };

src/plugins/debugger/debuggerengine.cpp

@@ -232,8 +232,7 @@ public:
 
     void doFinishDebugger()
     {
-        QTC_ASSERT(state() == EngineShutdownOk
-            || state() == EngineShutdownFailed, qDebug() << state());
+        QTC_ASSERT(state() == EngineShutdownFinished, qDebug() << state());
         m_engine->setState(DebuggerFinished);
         resetLocation();
         if (isMasterEngine()) {
@@ -348,8 +347,7 @@ QString DebuggerEngine::stateName(int s)
         SN(InferiorShutdownOk)
         SN(InferiorShutdownFailed)
         SN(EngineShutdownRequested)
-        SN(EngineShutdownOk)
-        SN(EngineShutdownFailed)
+        SN(EngineShutdownFinished)
         SN(DebuggerFinished)
     }
     return QLatin1String("<unknown>");
@@ -612,10 +610,8 @@ static bool isAllowedTransition(DebuggerState from, DebuggerState to)
         return to == EngineShutdownRequested;
 
     case EngineShutdownRequested:
-        return to == EngineShutdownOk || to == EngineShutdownFailed;
-    case EngineShutdownOk:
-        return to == DebuggerFinished;
-    case EngineShutdownFailed:
+        return to == EngineShutdownFinished;
+    case EngineShutdownFinished:
         return to == DebuggerFinished;
 
     case DebuggerFinished:
@@ -862,19 +858,11 @@ void DebuggerEnginePrivate::doShutdownEngine()
     m_engine->shutdownEngine();
 }
 
-void DebuggerEngine::notifyEngineShutdownOk()
-{
-    showMessage("NOTE: ENGINE SHUTDOWN OK");
-    QTC_ASSERT(state() == EngineShutdownRequested, qDebug() << this << state());
-    setState(EngineShutdownOk);
-    d->doFinishDebugger();
-}
-
-void DebuggerEngine::notifyEngineShutdownFailed()
+void DebuggerEngine::notifyEngineShutdownFinished()
 {
-    showMessage("NOTE: ENGINE SHUTDOWN FAILED");
+    showMessage("NOTE: ENGINE SHUTDOWN FINISHED");
     QTC_ASSERT(state() == EngineShutdownRequested, qDebug() << this << state());
-    setState(EngineShutdownFailed);
+    setState(EngineShutdownFinished);
     d->doFinishDebugger();
 }
 
@@ -919,7 +907,7 @@ void DebuggerEngine::notifyEngineSpontaneousShutdown()
     CALLGRIND_DUMP_STATS;
 #endif
     showMessage("NOTE: ENGINE SPONTANEOUS SHUTDOWN");
-    setState(EngineShutdownOk, true);
+    setState(EngineShutdownFinished, true);
     if (isMasterEngine())
         d->doFinishDebugger();
 }
@@ -949,7 +937,7 @@ void DebuggerEngine::notifyDebuggerProcessFinished(int exitCode,
         break;
     case EngineShutdownRequested:
     case InferiorShutdownRequested:
-        notifyEngineShutdownOk();
+        notifyEngineShutdownFinished();
         break;
     case InferiorRunOk:
         // This could either be a real gdb/lldb crash or a quickly exited inferior
@@ -1117,8 +1105,7 @@ bool DebuggerEngine::debuggerActionsEnabled(DebuggerState state)
     case InferiorShutdownOk:
     case InferiorShutdownFailed:
     case EngineShutdownRequested:
-    case EngineShutdownOk:
-    case EngineShutdownFailed:
+    case EngineShutdownFinished:
     case DebuggerFinished:
         return false;
     }

src/plugins/debugger/debuggerengine.h

@@ -415,8 +415,7 @@ protected:
     void notifyInferiorShutdownFailed();
 
     void notifyEngineSpontaneousShutdown();
-    void notifyEngineShutdownOk();
-    void notifyEngineShutdownFailed();
+    void notifyEngineShutdownFinished();
 
     void notifyEngineIll();
 

src/plugins/debugger/debuggerplugin.cpp

@@ -294,14 +294,12 @@
                   EngineShutdownRequested                                 +
                             +                                             +
            (calls *Engine->shutdownEngine())  <+-+-+-+-+-+-+-+-+-+-+-+-+-+'
-                         |        |
-                         |        |
-                    {notify-   {notify-
-                     Engine-    Engine-
-                  ShutdownOk}  ShutdownFailed}
-                         +       +
-            EngineShutdownOk  EngineShutdownFailed
-                         *       *
+                            |
+                            |
+              {notifyEngineShutdownFinished}
+                            +
+                  EngineShutdownFinished
+                            *
                      DebuggerFinished
 
 \endcode */
@@ -337,10 +335,8 @@ sg1:   InferiorExited -> InferiorExitOk [ label="notifyInferiorExited", style="d
 sg1:   InferiorExitOk -> InferiorShutdownOk
 sg1:   InferiorShutdownOk -> EngineShutdownRequested
 sg1:   InferiorShutdownFailed -> EngineShutdownRequested
-sg1:   EngineShutdownRequested -> EngineShutdownOk [ label="Engine::shutdownEngine\nnotifyEngineShutdownOk", style="dashed" ];
-sg1:   EngineShutdownRequested -> EngineShutdownFailed  [ label="Engine::shutdownEngine\nnotifyEngineShutdownFailed", style="dashed" ];
-sg1:   EngineShutdownOk -> DebuggerFinished  [ style = "dotted" ];
-sg1:   EngineShutdownFailed  -> DebuggerFinished [ style = "dotted" ];
+sg1:   EngineShutdownRequested -> EngineShutdownFinished [ label="Engine::shutdownEngine\nnotifyEngineShutdownFinished", style="dashed" ];
+sg1:   EngineShutdownFinished -> DebuggerFinished  [ style = "dotted" ];
 sg1: }
 * \endcode */
 // Additional signalling:    {notifyInferiorIll}   {notifyEngineIll}

src/plugins/debugger/gdb/gdbengine.cpp

@@ -111,8 +111,7 @@ static bool stateAcceptsGdbCommands(DebuggerState state)
     case InferiorStopFailed:
     case EngineRunFailed:
     case InferiorRunFailed:
-    case EngineShutdownOk:
-    case EngineShutdownFailed:
+    case EngineShutdownFinished:
     case DebuggerFinished:
         return false;
     }
@@ -919,7 +918,7 @@ void GdbEngine::commandTimeout()
             showMessage("KILLING DEBUGGER AS REQUESTED BY USER");
             // This is an undefined state, so we just pull the emergency brake.
             m_gdbProc.kill();
-            notifyEngineShutdownFailed();
+            notifyEngineShutdownFinished();
         } else {
             showMessage("CONTINUE DEBUGGER AS REQUESTED BY USER");
         }
@@ -1769,7 +1768,7 @@ void GdbEngine::handleGdbExit(const DebuggerResponse &response)
         qDebug() << QString("GDB WON'T EXIT (%1); KILLING IT").arg(msg);
         showMessage(QString("GDB WON'T EXIT (%1); KILLING IT").arg(msg));
         m_gdbProc.kill();
-        notifyEngineShutdownFailed();
+        notifyEngineShutdownFinished();
     }
 }
 
@@ -4575,12 +4574,12 @@ void GdbEngine::shutdownEngine()
     }
     case QProcess::NotRunning:
         // Cannot find executable.
-        notifyEngineShutdownOk();
+        notifyEngineShutdownFinished();
         break;
     case QProcess::Starting:
         showMessage("GDB NOT REALLY RUNNING; KILLING IT");
         m_gdbProc.kill();
-        notifyEngineShutdownFailed();
+        notifyEngineShutdownFinished();
         break;
     }
 }

src/plugins/debugger/lldb/lldbengine.cpp

@@ -167,7 +167,7 @@ void LldbEngine::shutdownEngine()
 {
     QTC_ASSERT(state() == EngineShutdownRequested, qDebug() << state());
     m_lldbProc.kill();
-    notifyEngineShutdownOk();
+    notifyEngineShutdownFinished();
 }
 
 void LldbEngine::abortDebuggerProcess()
@@ -858,10 +858,8 @@ void LldbEngine::handleStateNotification(const GdbMi &reportedState)
         notifyInferiorShutdownOk();
     else if (newState == "inferiorshutdownfailed")
         notifyInferiorShutdownFailed();
-    else if (newState == "engineshutdownok")
-        notifyEngineShutdownOk();
-    else if (newState == "engineshutdownfailed")
-        notifyEngineShutdownFailed();
+    else if (newState == "engineshutdownfinished")
+        notifyEngineShutdownFinished();
     else if (newState == "inferiorexited")
         notifyInferiorExited();
 }

src/plugins/debugger/qml/qmlcppengine.cpp

@@ -606,14 +606,9 @@ void QmlCppEngine::slaveEngineStateChanged
             CHECK_STATE(EngineShutdownRequested);
             break;
         }
-        case EngineShutdownFailed: {
+        case EngineShutdownFinished: {
             CHECK_STATE(EngineShutdownRequested);
-            notifyEngineShutdownFailed();
-            break;
-        }
-        case EngineShutdownOk: {
-            CHECK_STATE(EngineShutdownRequested);
-            notifyEngineShutdownOk();
+            notifyEngineShutdownFinished();
             break;
         }
         case DebuggerFinished: {

src/plugins/debugger/qml/qmlengine.cpp

@@ -575,7 +575,7 @@ void QmlEngine::shutdownEngine()
    // double check (ill engine?):
     stopApplicationLauncher();
 
-    notifyEngineShutdownOk();
+    notifyEngineShutdownFinished();
     if (!isSlaveEngine())
         showMessage(QString(), StatusBar);
 }