[shutdown] Add logs when shutdown is done

src/core/lib/surface/init.cc

@@ -136,8 +136,8 @@ void grpc_shutdown_internal_locked(void)
   g_shutting_down_cv->SignalAll();
 }
 
-void grpc_shutdown_internal(void* /*ignored*/) {
-  GRPC_API_TRACE("grpc_shutdown_internal", 0, ());
+void grpc_shutdown_from_cleanup_thread(void* /*ignored*/) {
+  GRPC_API_TRACE("grpc_shutdown_from_cleanup_thread", 0, ());
   grpc_core::MutexLock lock(g_init_mu);
   // We have released lock from the shutdown thread and it is possible that
   // another grpc_init has been called, and do nothing if that is the case.
@@ -145,6 +145,7 @@ void grpc_shutdown_internal(void* /*ignored*/) {
     return;
   }
   grpc_shutdown_internal_locked();
+  gpr_log(GPR_DEBUG, "grpc_shutdown from cleanup thread done");
 }
 
 void grpc_shutdown(void) {
@@ -165,6 +166,7 @@ void grpc_shutdown(void) {
       gpr_log(GPR_DEBUG, "grpc_shutdown starts clean-up now");
       g_shutting_down = true;
       grpc_shutdown_internal_locked();
+      gpr_log(GPR_DEBUG, "grpc_shutdown done");
     } else {
       // spawn a detached thread to do the actual clean up in case we are
       // currently in an executor thread.
@@ -172,7 +174,7 @@ void grpc_shutdown(void) {
       g_initializations++;
       g_shutting_down = true;
       grpc_core::Thread cleanup_thread(
-          "grpc_shutdown", grpc_shutdown_internal, nullptr, nullptr,
+          "grpc_shutdown", grpc_shutdown_from_cleanup_thread, nullptr, nullptr,
           grpc_core::Thread::Options().set_joinable(false).set_tracked(false));
       cleanup_thread.Start();
     }