figments: renderer: store last figment name for crash reporting purposes

lib/Figments/Renderer.cpp

@@ -3,6 +3,18 @@
 
 #include <ArduinoLog.h>
 
+#ifndef __NOINIT_ATTR // Pre-defined on esp32
+#define __NOINIT_ATTR __attribute__ ((section (".noinit")))
+#endif
+
+__NOINIT_ATTR const char* s_lastFigmentName;
+
+const char*
+Renderer::lastFigmentName()
+{
+    return s_lastFigmentName;
+}
+
 void
 Renderer::loop()
 {
@@ -13,6 +25,7 @@ Renderer::loop()
                 unsigned int frameStart = ESP.getCycleCount();
 #endif
                 Log.verbose("Render %s", figment->name);
+                s_lastFigmentName = figment->name;
                 figment->render(dpy);
 #if defined(BOARD_ESP32) or defined(BOARD_ESP8266)
                 unsigned int runtime = (ESP.getCycleCount() - frameStart) / 160000;

lib/Figments/Renderer.h

@@ -10,6 +10,8 @@ public:
     void loop() override;
     void onStart() override;
 
+    static const char* lastFigmentName();
+
 private:
     const std::vector<Figment*> m_figments;
     const std::vector<Display*> m_displays;