Added debugger step back button. Functionality still TODO.

resources.qrc

@@ -18,6 +18,7 @@
         <file>icons/debug-pause.png</file>
         <file>icons/StepInto.png</file>
         <file>icons/StepOver.png</file>
+        <file>icons/StepBack.png</file>
         <file>icons/StepOut.png</file>
         <file>icons/RunPpuFrame.png</file>
         <file>icons/RunPpuHalfFrame.png</file>

src/drivers/Qt/ConsoleDebugger.cpp

@@ -76,6 +76,7 @@
 #include "Qt/HexEditor.h"
 #include "Qt/ConsoleDebugger.h"
 #include "Qt/ConsoleUtilities.h"
+#include "Qt/TraceLogger.h"
 #include "Qt/ColorMenu.h"
 
 // Where are these defined?
@@ -588,6 +589,16 @@ QMenuBar *ConsoleDebugger::buildMenuBar(void)
 
 	debugMenu->addAction(act);
 
+	// Debug -> Step Back
+	stepBackMenuAct = act = new QAction(tr("Step &Back"), this);
+	act->setShortcut(QKeySequence( tr("F9") ) );
+	act->setStatusTip(tr("Step Back"));
+	act->setIcon( QIcon(":icons/StepBack.png") );
+	act->setEnabled(false);
+	connect( act, SIGNAL(triggered()), this, SLOT(debugStepBackCB(void)) );
+
+	debugMenu->addAction(act);
+
 	// Debug -> Run to Selected Line
 	act = new QAction(tr("Run to S&elected Line"), this);
 	act->setShortcut(QKeySequence( tr("F1") ) );
@@ -831,6 +842,16 @@ QToolBar *ConsoleDebugger::buildToolBar(void)
 
 	toolBar->addAction(act);
 
+	// Debug -> Step Back
+	stepBackToolAct = act = new QAction(tr("Step &Back (F9)"), this);
+	//act->setShortcut(QKeySequence( tr("F9") ) );
+	act->setStatusTip(tr("Step Back"));
+	act->setIcon( QIcon(":icons/StepBack.png") );
+	act->setEnabled(false);
+	connect( act, SIGNAL(triggered()), this, SLOT(debugStepBackCB(void)) );
+
+	toolBar->addAction(act);
+
 	toolBar->addSeparator();
 
 	// Debug -> Run Line
@@ -2725,6 +2746,14 @@ void ConsoleDebugger::debugStepOverCB(void)
 	}
 }
 //----------------------------------------------------------------------------
+void ConsoleDebugger::debugStepBackCB(void)
+{
+	if (FCEUI_EmulationPaused()) 
+	{
+
+	}
+}
+//----------------------------------------------------------------------------
 void ConsoleDebugger::debugRunToCursorCB(void)
 {
 	asmView->setBreakpointAtSelectedLine();
@@ -4068,6 +4097,9 @@ void ConsoleDebugger::updatePeriodic(void)
 		dbgPauseAct[1]->setEnabled(true);
 	}
 
+	stepBackMenuAct->setEnabled( FCEUD_TraceLoggerRunning() );
+	stepBackToolAct->setEnabled( FCEUD_TraceLoggerRunning() );
+
 	if ( waitingAtBp && (lastBpIdx == BREAK_TYPE_CYCLES_EXCEED) )
 	{
 		cpuCyclesLbl1->setStyleSheet("background-color: blue; color: white;");

src/drivers/Qt/ConsoleDebugger.h

@@ -501,6 +501,8 @@ class ConsoleDebugger : public QDialog
 
 		QAction   *brkOnCycleExcAct;
 		QAction   *brkOnInstrExcAct;
+		QAction   *stepBackMenuAct;
+		QAction   *stepBackToolAct;
 
 		DebuggerTabWidget *tabView[2][4];
 		QWidget   *asmViewContainerWidget;
@@ -561,6 +563,7 @@ class ConsoleDebugger : public QDialog
 		void debugStepIntoCB(void);
 		void debugStepOutCB(void);
 		void debugStepOverCB(void);
+		void debugStepBackCB(void);
 		void debugRunToCursorCB(void);
 		void debugRunLineCB(void);
 		void debugRunLine128CB(void);

src/drivers/Qt/TraceLogger.cpp

@@ -390,7 +390,7 @@ TraceLoggerDialog_t::~TraceLoggerDialog_t(void)
 {
 	updateTimer->stop();
 
-	logging = 0;
+	//logging = 0;
 	msleep(1);
 	diskThread->requestInterruption();
 	diskThread->quit();
@@ -1191,6 +1191,11 @@ static void pushMsgToLogBuffer(const char *msg)
 	pushToLogBuffer(rec);
 }
 //----------------------------------------------------
+int FCEUD_TraceLoggerRunning(void)
+{
+	return logging;
+}
+//----------------------------------------------------
 //todo: really speed this up
 void FCEUD_TraceInstruction(uint8 *opcode, int size)
 {

src/drivers/Qt/TraceLogger.h

@@ -14,6 +14,7 @@
 #include <QLabel>
 #include <QFrame>
 #include <QTimer>
+#include <QThread>
 #include <QGroupBox>
 #include <QScrollBar>
 #include <QCloseEvent>
@@ -224,3 +225,5 @@ private slots:
 int initTraceLogBuffer(int maxRecs);
 
 void openTraceLoggerWindow(QWidget *parent);
+
+int FCEUD_TraceLoggerRunning(void);