Qt: Let memory access logs be loaded read-only

src/platform/qt/MemoryAccessLogController.cpp

@@ -65,7 +65,9 @@ void MemoryAccessLogController::updateRegion(const QString& internalName, bool c
 	if (!m_active) {
 		return;
 	}
+	if (checked && !m_regionMapping.contains(internalName)) {
 		m_regionMapping[internalName] = mDebuggerAccessLoggerWatchMemoryBlockName(&m_logger, internalName.toUtf8().constData(), activeFlags());
+	}
 	emit regionMappingChanged(internalName, checked);
 }
 
@@ -74,6 +76,38 @@ void MemoryAccessLogController::setFile(const QString& path) {
 }
 
 void MemoryAccessLogController::start(bool loadExisting, bool logExtra) {
+	if (!m_loaded) {
+		load(loadExisting);
+	}
+	if (!m_loaded) {
+		return;
+	}
+	CoreController::Interrupter interrupter(m_controller);
+	mDebuggerAccessLoggerStart(&m_logger);
+	m_logExtra = logExtra;
+
+	m_active = true;
+	for (const auto& region : m_watchedRegions) {
+		m_regionMapping[region] = mDebuggerAccessLoggerWatchMemoryBlockName(&m_logger, region.toUtf8().constData(), activeFlags());
+	}
+	emit loggingChanged(true);
+}
+
+void MemoryAccessLogController::stop() {
+	if (!m_active) {
+		return;
+	}
+	CoreController::Interrupter interrupter(m_controller);
+	mDebuggerAccessLoggerStop(&m_logger);
+	emit loggingChanged(false);
+	interrupter.resume();
+	m_active = false;
+}
+
+void MemoryAccessLogController::load(bool loadExisting) {
+	if (m_loaded) {
+		return;
+	}
 	int flags = O_CREAT | O_RDWR;
 	if (!loadExisting) {
 		flags |= O_TRUNC;
@@ -83,7 +117,6 @@ void MemoryAccessLogController::start(bool loadExisting, bool logExtra) {
 		LOG(QT, ERROR) << tr("Failed to open memory log file");
 		return;
 	}
-	m_logExtra = logExtra;
 
 	mDebuggerAccessLoggerInit(&m_logger);
 	CoreController::Interrupter interrupter(m_controller);
@@ -93,26 +126,22 @@ void MemoryAccessLogController::start(bool loadExisting, bool logExtra) {
 		LOG(QT, ERROR) << tr("Failed to open memory log file");
 		return;
 	}
-	mDebuggerAccessLoggerStart(&m_logger);
-
-	m_active = true;
-	emit loggingChanged(true);
-	for (const auto& region : m_watchedRegions) {
-		m_regionMapping[region] = mDebuggerAccessLoggerWatchMemoryBlockName(&m_logger, region.toUtf8().constData(), activeFlags());
-	}
-	interrupter.resume();
+	emit loaded(true);
+	m_loaded = true;
 }
 
-void MemoryAccessLogController::stop() {
-	if (!m_active) {
+void MemoryAccessLogController::unload() {
+	if (m_active) {
+		stop();
+	}
+	if (m_active) {
 		return;
 	}
 	CoreController::Interrupter interrupter(m_controller);
 	m_controller->detachDebuggerModule(&m_logger.d);
 	mDebuggerAccessLoggerDeinit(&m_logger);
-	emit loggingChanged(false);
-	interrupter.resume();
-	m_active = false;
+	emit loaded(false);
+	m_loaded = false;
 }
 
 mDebuggerAccessLogRegionFlags MemoryAccessLogController::activeFlags() const {

src/platform/qt/MemoryAccessLogController.h

@@ -49,6 +49,7 @@ public:
 
 	QString file() const { return m_path; }
 	bool active() const { return m_active; }
+	bool isLoaded() const { return m_loaded; }
 
 public slots:
 	void updateRegion(const QString& internalName, bool enable);
@@ -57,9 +58,13 @@ public slots:
 	void start(bool loadExisting, bool logExtra);
 	void stop();
 
+	void load(bool loadExisting);
+	void unload();
+
 	void exportFile(const QString& filename);
 
 signals:
+	void loaded(bool loaded);
 	void loggingChanged(bool active);
 	void regionMappingChanged(const QString& internalName, bool active);
 
@@ -71,6 +76,7 @@ private:
 	QHash<QString, int> m_regionMapping;
 	QVector<Region> m_regions;
 	struct mDebuggerAccessLogger m_logger{};
+	bool m_loaded = false;
 	bool m_active = false;
 	mDebuggerAccessLogRegion* m_cachedRegion = nullptr;
 

src/platform/qt/MemoryAccessLogView.cpp

@@ -26,8 +26,10 @@ MemoryAccessLogView::MemoryAccessLogView(std::weak_ptr<MemoryAccessLogController
 	connect(m_ui.exportButton, &QAbstractButton::clicked, this, &MemoryAccessLogView::exportFile);
 	connect(controllerPtr.get(), &MemoryAccessLogController::regionMappingChanged, this, &MemoryAccessLogView::updateRegion);
 	connect(controllerPtr.get(), &MemoryAccessLogController::loggingChanged, this, &MemoryAccessLogView::handleStartStop);
+	connect(controllerPtr.get(), &MemoryAccessLogController::loaded, this, &MemoryAccessLogView::handleLoadUnload);
 
 	bool active = controllerPtr->active();
+	bool loaded = controllerPtr->isLoaded();
 	auto watchedRegions = controllerPtr->watchedRegions();
 
 	QVBoxLayout* regionBox = static_cast<QVBoxLayout*>(m_ui.regionBox->layout());
@@ -46,11 +48,14 @@ MemoryAccessLogView::MemoryAccessLogView(std::weak_ptr<MemoryAccessLogController
 		});
 	}
 
+	handleLoadUnload(loaded);
 	handleStartStop(active);
 }
 
-void MemoryAccessLogView::updateRegion(const QString& internalName, bool) {
+void MemoryAccessLogView::updateRegion(const QString& internalName, bool checked) {
+	if (checked) {
 		m_regionBoxes[internalName]->setEnabled(false);
+	}
 }
 
 void MemoryAccessLogView::start() {
@@ -68,10 +73,23 @@ void MemoryAccessLogView::stop() {
 		return;
 	}
 	controllerPtr->stop();
-	for (const auto& region : controllerPtr->watchedRegions()) {
-		m_regionBoxes[region]->setEnabled(true);
+}
+
+void MemoryAccessLogView::load() {
+	std::shared_ptr<MemoryAccessLogController> controllerPtr = m_controller.lock();
+	if (!controllerPtr) {
+		return;
 	}
-	m_ui.exportButton->setEnabled(false);
+	controllerPtr->setFile(m_ui.filename->text());
+	controllerPtr->load(m_ui.loadExisting->isChecked());
+}
+
+void MemoryAccessLogView::unload() {
+	std::shared_ptr<MemoryAccessLogController> controllerPtr = m_controller.lock();
+	if (!controllerPtr) {
+		return;
+	}
+	controllerPtr->unload();
 }
 
 void MemoryAccessLogView::selectFile() {
@@ -110,12 +128,26 @@ void MemoryAccessLogView::handleStartStop(bool start) {
 		m_regionBoxes[region]->setChecked(true);
 	}
 
-	if (watchedRegions.contains(QString("cart0"))) {
-		m_ui.exportButton->setEnabled(start);
-	}
-
 	m_ui.start->setDisabled(start);
 	m_ui.stop->setEnabled(start);
-	m_ui.filename->setDisabled(start);
-	m_ui.browse->setDisabled(start);
+	m_ui.unload->setDisabled(start || !controllerPtr->isLoaded());
+}
+
+void MemoryAccessLogView::handleLoadUnload(bool load) {
+	std::shared_ptr<MemoryAccessLogController> controllerPtr = m_controller.lock();
+	if (!controllerPtr) {
+		return;
+	}
+	m_ui.filename->setText(controllerPtr->file());
+
+	if (load && controllerPtr->canExport()) {
+		m_ui.exportButton->setEnabled(true);
+	} else if (!load) {
+		m_ui.exportButton->setEnabled(false);
+	}
+
+	m_ui.load->setDisabled(load);
+	m_ui.unload->setEnabled(load);
+	m_ui.filename->setDisabled(load);
+	m_ui.browse->setDisabled(load);
 }

src/platform/qt/MemoryAccessLogView.h

@@ -34,9 +34,13 @@ private slots:
 	void start();
 	void stop();
 
+	void load();
+	void unload();
+
 	void exportFile();
 
 	void handleStartStop(bool start);
+	void handleLoadUnload(bool load);
 
 private:
 	Ui::MemoryAccessLogView m_ui;

src/platform/qt/MemoryAccessLogView.ui

@@ -6,8 +6,8 @@
    <rect>
     <x>0</x>
     <y>0</y>
-    <width>385</width>
-    <height>380</height>
+    <width>311</width>
+    <height>387</height>
    </rect>
   </property>
   <property name="windowTitle">
@@ -22,25 +22,25 @@
      <property name="title">
       <string>Log file</string>
      </property>
-     <layout class="QGridLayout" name="gridLayout_2">
-      <item row="0" column="0">
+     <layout class="QGridLayout" name="gridLayout_2" columnstretch="3,1,2">
+      <item row="0" column="0" colspan="2">
        <widget class="QLineEdit" name="filename"/>
       </item>
-      <item row="0" column="1">
+      <item row="0" column="2">
        <widget class="QPushButton" name="browse">
         <property name="text">
          <string>Browse</string>
         </property>
        </widget>
       </item>
-      <item row="1" column="0" colspan="2">
+      <item row="1" column="0" colspan="3">
        <widget class="QCheckBox" name="logExtra">
         <property name="text">
          <string>Log additional information (uses 3× space)</string>
         </property>
        </widget>
       </item>
-      <item row="2" column="0" colspan="2">
+      <item row="2" column="0" colspan="3">
        <widget class="QCheckBox" name="loadExisting">
         <property name="text">
          <string>Load existing file if present</string>
@@ -50,6 +50,23 @@
         </property>
        </widget>
       </item>
+      <item row="3" column="0">
+       <widget class="QPushButton" name="load">
+        <property name="text">
+         <string>Load</string>
+        </property>
+       </widget>
+      </item>
+      <item row="3" column="1" colspan="2">
+       <widget class="QPushButton" name="unload">
+        <property name="enabled">
+         <bool>false</bool>
+        </property>
+        <property name="text">
+         <string>Unload</string>
+        </property>
+       </widget>
+      </item>
      </layout>
     </widget>
    </item>
@@ -124,9 +141,43 @@
     </hint>
    </hints>
   </connection>
+  <connection>
+   <sender>load</sender>
+   <signal>clicked()</signal>
+   <receiver>QGBA::MemoryAccessLogView</receiver>
+   <slot>load()</slot>
+   <hints>
+    <hint type="sourcelabel">
+     <x>81</x>
+     <y>152</y>
+    </hint>
+    <hint type="destinationlabel">
+     <x>192</x>
+     <y>189</y>
+    </hint>
+   </hints>
+  </connection>
+  <connection>
+   <sender>unload</sender>
+   <signal>clicked()</signal>
+   <receiver>QGBA::MemoryAccessLogView</receiver>
+   <slot>unload()</slot>
+   <hints>
+    <hint type="sourcelabel">
+     <x>226</x>
+     <y>152</y>
+    </hint>
+    <hint type="destinationlabel">
+     <x>192</x>
+     <y>189</y>
+    </hint>
+   </hints>
+  </connection>
  </connections>
  <slots>
   <slot>start()</slot>
   <slot>stop()</slot>
+  <slot>load()</slot>
+  <slot>unload()</slot>
  </slots>
 </ui>