got all of the code actually running (not fully functional though)
diff --git a/aos/common/logging/logging_impl.cc b/aos/common/logging/logging_impl.cc
index de1c64a..bdc14ec 100644
--- a/aos/common/logging/logging_impl.cc
+++ b/aos/common/logging/logging_impl.cc
@@ -6,6 +6,7 @@
 #include "aos/common/time.h"
 #include "aos/common/inttypes.h"
 #include "aos/common/once.h"
+#include "aos/common/queue_types.h"
 
 namespace aos {
 namespace logging {
@@ -84,6 +85,26 @@
 
 }  // namespace internal
 
+void LogImplementation::LogStruct(
+    log_level level, const ::std::string &message, size_t size,
+    const MessageType *type, const ::std::function<size_t(char *)> &serialize) {
+  char serialized[1024];
+  if (size > sizeof(serialized)) {
+    LOG(FATAL, "structure of type %s too big to serialize\n",
+        type->name.c_str());
+  }
+  size_t used = serialize(serialized);
+  char printed[LOG_MESSAGE_LEN];
+  size_t printed_bytes = sizeof(printed);
+  if (!PrintMessage(printed, &printed_bytes, serialized, &used, *type)) {
+    LOG(FATAL, "PrintMessage(%p, %p(=%zd), %p, %p(=%zd), %p(name=%s)) failed\n",
+        printed, &printed_bytes, printed_bytes, serialized, &used, used, type,
+        type->name.c_str());
+  }
+  DoLogVariadic(level, "%.*s: %.*s\n", static_cast<int>(message.size()),
+                message.data(), static_cast<int>(printed_bytes), printed);
+}
+
 StreamLogImplementation::StreamLogImplementation(FILE *stream)
     : stream_(stream) {}
 
diff --git a/aos/common/logging/logging_impl.h b/aos/common/logging/logging_impl.h
index bdbe585..f2d9752 100644
--- a/aos/common/logging/logging_impl.h
+++ b/aos/common/logging/logging_impl.h
@@ -7,6 +7,7 @@
 #include <limits.h>
 #include <string.h>
 #include <stdio.h>
+#include <stdarg.h>
 
 #include <string>
 #include <functional>
@@ -118,6 +119,12 @@
   // Actually logs the given message. Implementations should somehow create a
   // LogMessage and then call internal::FillInMessage.
   virtual void DoLog(log_level level, const char *format, va_list ap) = 0;
+  void DoLogVariadic(log_level level, const char *format, ...) {
+    va_list ap;
+    va_start(ap, format);
+    DoLog(level, format, ap);
+    va_end(ap);
+  }
 
   // Logs the contents of an auto-generated structure. The implementation here
   // just converts it to a string with PrintMessage and then calls DoLog with
diff --git a/aos/common/logging/logging_interface.cc b/aos/common/logging/logging_interface.cc
index 9f1168f..68a88a8 100644
--- a/aos/common/logging/logging_interface.cc
+++ b/aos/common/logging/logging_interface.cc
@@ -60,16 +60,6 @@
 
 using internal::Context;
 
-void LogImplementation::LogStruct(
-    log_level level, const ::std::string &message, size_t size,
-    const MessageType *type, const ::std::function<size_t(char *)> &serialize) {
-  (void)level;
-  (void)message;
-  (void)size;
-  (void)type;
-  (void)serialize;
-}
-
 void LogImplementation::DoVLog(log_level level, const char *format, va_list ap,
                                int levels) {
   internal::RunWithCurrentImplementation(