Merge pull request #4138

7f8bdeb easylogging++: make the logger handle early/late logging (moneromooo-monero)
bc8cbdb stack_trace: print stack traces on stdout if the logger isn't live (moneromooo-monero)

external/easylogging++/easylogging++.cc

@@ -2092,6 +2092,17 @@ void VRegistry::setFromArgs(const base::utils::CommandLineArgs* commandLineArgs)
 #   define ELPP_DEFAULT_LOGGING_FLAGS 0x0
 #endif // !defined(ELPP_DEFAULT_LOGGING_FLAGS)
 // Storage
+el::base::type::StoragePointer getresetELPP(bool reset)
+{
+  static el::base::type::StoragePointer p(new el::base::Storage(el::LogBuilderPtr(new el::base::DefaultLogBuilder())));
+  if (reset)
+    p = NULL;
+  return p;
+}
+el::base::type::StoragePointer el::base::Storage::getELPP()
+{
+  return getresetELPP(false);
+}
 #if ELPP_ASYNC_LOGGING
 Storage::Storage(const LogBuilderPtr& defaultLogBuilder, base::IWorker* asyncDispatchWorker) :
 #else
@@ -2140,6 +2151,7 @@ Storage::Storage(const LogBuilderPtr& defaultLogBuilder) :
 
 Storage::~Storage(void) {
   ELPP_INTERNAL_INFO(4, "Destroying storage");
+  getresetELPP(true);
 #if ELPP_ASYNC_LOGGING
   ELPP_INTERNAL_INFO(5, "Replacing log dispatch callback to synchronous");
   uninstallLogDispatchCallback<base::AsyncLogDispatchCallback>(std::string("AsyncLogDispatchCallback"));

external/easylogging++/easylogging++.h

@@ -2766,6 +2766,8 @@ class Storage : base::NoCopy, public base::threading::ThreadSafe {
     return it->second;
   }
 
+  static el::base::type::StoragePointer getELPP();
+
  private:
   base::RegisteredHitCounters* m_registeredHitCounters;
   base::RegisteredLoggers* m_registeredLoggers;
@@ -2798,7 +2800,7 @@ class Storage : base::NoCopy, public base::threading::ThreadSafe {
   }
 };
 extern ELPP_EXPORT base::type::StoragePointer elStorage;
-#define ELPP el::base::elStorage
+#define ELPP el::base::Storage::getELPP()
 class DefaultLogDispatchCallback : public LogDispatchCallback {
  protected:
   void handle(const LogDispatchData* data);
@@ -4628,10 +4630,9 @@ el::base::debug::CrashHandler elCrashHandler(ELPP_USE_DEF_CRASH_HANDLER); \
 }
 
 #if ELPP_ASYNC_LOGGING
-#  define INITIALIZE_EASYLOGGINGPP ELPP_INIT_EASYLOGGINGPP(new el::base::Storage(el::LogBuilderPtr(new el::base::DefaultLogBuilder()),\
-new el::base::AsyncDispatchWorker()))
+#  define INITIALIZE_EASYLOGGINGPP ELPP_INIT_EASYLOGGINGPP(NULL)
 #else
-#  define INITIALIZE_EASYLOGGINGPP ELPP_INIT_EASYLOGGINGPP(new el::base::Storage(el::LogBuilderPtr(new el::base::DefaultLogBuilder())))
+#  define INITIALIZE_EASYLOGGINGPP ELPP_INIT_EASYLOGGINGPP(NULL)
 #endif  // ELPP_ASYNC_LOGGING
 #define INITIALIZE_NULL_EASYLOGGINGPP \
 namespace el {\

src/common/stack_trace.cpp

@@ -49,7 +49,16 @@
 #undef MONERO_DEFAULT_LOG_CATEGORY
 #define MONERO_DEFAULT_LOG_CATEGORY "stacktrace"
 
-#define ST_LOG(x) CINFO(el::base::Writer,el::base::DispatchAction::FileOnlyLog,MONERO_DEFAULT_LOG_CATEGORY) << x
+#define ST_LOG(x) \
+  do { \
+    auto elpp = ELPP; \
+    if (elpp) { \
+      CINFO(el::base::Writer,el::base::DispatchAction::FileOnlyLog,MONERO_DEFAULT_LOG_CATEGORY) << x; \
+    } \
+    else { \
+      std::cout << x << std::endl; \
+    } \
+  } while(0)
 
 // from https://stackoverflow.com/questions/11665829/how-can-i-print-stack-trace-for-caught-exceptions-in-c-code-injection-in-c