[APP] Flush log & save config on quick exit

src/xenia/base/logging.cc

@@ -65,6 +65,7 @@ DEFINE_int32(
 
 namespace dp = disruptorplus;
 using namespace xe::literals;
+using namespace std::chrono_literals;
 
 namespace xe {
 
@@ -240,9 +241,15 @@ class Logger {
     sinks_.push_back(std::move(sink));
   }
 
+  void FlushAllSinks() {
+    for (const auto& sink : sinks_) {
+      sink->Flush();
+    }
+  }
+
  private:
   static constexpr size_t kBufferSize = 8_MiB;
-  uint8_t buffer_[kBufferSize];
+  uint8_t buffer_[kBufferSize] = {};
 
   static constexpr size_t kBlockSize = 256;
   static constexpr size_t kBlockCount = kBufferSize / kBlockSize;
@@ -468,6 +475,15 @@ void ShutdownLogging() {
   memory::AlignedFree(logger);
 }
 
+void FlushLog() {
+  if (!logger_) {
+    return;
+  }
+
+  xe::threading::Sleep(10ms);
+  logger_->FlushAllSinks();
+}
+
 static int g_saved_loglevel = static_cast<int>(LogLevel::Disabled);
 void logging::ToggleLogLevel() {
   auto swap = g_saved_loglevel;

src/xenia/base/logging.h

@@ -75,6 +75,7 @@ class DebugPrintLogSink final : public LogSink {
 // Must be called on startup.
 void InitializeLogging(const std::string_view app_name);
 void ShutdownLogging();
+void FlushLog();
 
 namespace logging {