diff --git a/src/mono/mono/metadata/gc.c b/src/mono/mono/metadata/gc.c
index d9fe1afbe86f88..f81963be552b9f 100644
--- a/src/mono/mono/metadata/gc.c
+++ b/src/mono/mono/metadata/gc.c
@@ -999,17 +999,32 @@ finalizer_thread (gpointer unused)
 	return 0;
 }
 
-#ifndef LAZY_GC_THREAD_CREATION
-static
-#endif
-void
-mono_gc_init_finalizer_thread (void)
+static void
+init_finalizer_thread (void)
 {
 	ERROR_DECL (error);
 	gc_thread = mono_thread_create_internal (mono_domain_get (), (gpointer)finalizer_thread, NULL, MONO_THREAD_CREATE_FLAGS_NONE, error);
 	mono_error_assert_ok (error);
 }
 
+/**
+ * mono_gc_init_finalizer_thread:
+ *
+ * If the runtime is compiled with --with-lazy-gc-thread-creation, this
+ * function must be called by embedders to create the finalizer. Otherwise, the
+ * function does nothing and the runtime creates the finalizer thread
+ * automatically.
+ */
+void
+mono_gc_init_finalizer_thread (void)
+{
+#ifndef LAZY_GC_THREAD_CREATION
+	/* do nothing */
+#else
+	init_finalizer_thread ();
+#endif
+}
+
 static void
 reference_queue_mutex_init (void)
 {
@@ -1048,7 +1063,7 @@ mono_gc_init (void)
 
 #ifndef LAZY_GC_THREAD_CREATION
 	if (!mono_runtime_get_no_exec ())
-		mono_gc_init_finalizer_thread ();
+		init_finalizer_thread ();
 #endif
 }
 
diff --git a/src/mono/mono/metadata/mono-gc.h b/src/mono/mono/metadata/mono-gc.h
index 86111ac345b88f..72c768e27d1656 100644
--- a/src/mono/mono/metadata/mono-gc.h
+++ b/src/mono/mono/metadata/mono-gc.h
@@ -123,6 +123,9 @@ MONO_API int    mono_gc_invoke_finalizers (void);
 /* heap walking is only valid in the pre-stop-world event callback */
 MONO_API int    mono_gc_walk_heap        (int flags, MonoGCReferences callback, void *data);
 
+MONO_API MONO_RT_EXTERNAL_ONLY void
+mono_gc_init_finalizer_thread (void);
+
 MONO_END_DECLS
 
 #endif /* __METADATA_MONO_GC_H__ */
diff --git a/src/mono/mono/mini/aot-runtime.c b/src/mono/mono/mini/aot-runtime.c
index c603e03dae7a9f..c41ee32348c176 100644
--- a/src/mono/mono/mini/aot-runtime.c
+++ b/src/mono/mono/mini/aot-runtime.c
@@ -71,6 +71,7 @@
 #include "aot-runtime.h"
 #include "jit-icalls.h"
 #include "mini-runtime.h"
+#include "mono-private-unstable.h"
 #include "llvmonly-runtime.h"
 
 #ifndef DISABLE_AOT
diff --git a/src/mono/mono/mini/aot-runtime.h b/src/mono/mono/mini/aot-runtime.h
index cd399c0ce1b3ba..292c759970e721 100644
--- a/src/mono/mono/mini/aot-runtime.h
+++ b/src/mono/mono/mini/aot-runtime.h
@@ -273,16 +273,6 @@ gboolean mono_aot_init_llvmonly_method      (gpointer amodule, guint32 method_in
 GHashTable *mono_aot_get_weak_field_indexes (MonoImage *image);
 MonoAotMethodFlags mono_aot_get_method_flags (guint8 *code);
 
-/* These are used to load the AOT data for aot images compiled with MONO_AOT_FILE_FLAG_SEPARATE_DATA */
-/*
- * Return the AOT data for ASSEMBLY. SIZE is the size of the data. OUT_HANDLE should be set to a handle which is later
- * passed to the free function.
- */
-typedef unsigned char* (*MonoLoadAotDataFunc)          (MonoAssembly *assembly, int size, gpointer user_data, void **out_handle);
-/* Not yet used */
-typedef void  (*MonoFreeAotDataFunc)          (MonoAssembly *assembly, int size, gpointer user_data, void *handle);
-MONO_API void mono_install_load_aot_data_hook (MonoLoadAotDataFunc load_func, MonoFreeAotDataFunc free_func, gpointer user_data);
-
 #ifdef MONO_ARCH_CODE_EXEC_ONLY
 typedef guint32 (*MonoAotResolvePltInfoOffset)(gpointer amodule, guint32 plt_entry_index);
 #endif
diff --git a/src/mono/mono/mini/jit.h b/src/mono/mono/mini/jit.h
index 9fc6a183facba7..011792c346b488 100644
--- a/src/mono/mono/mini/jit.h
+++ b/src/mono/mono/mini/jit.h
@@ -112,7 +112,6 @@ mono_aot_register_module (void **aot_info);
 MONO_API MONO_RT_EXTERNAL_ONLY
 MonoDomain* mono_jit_thread_attach (MonoDomain *domain);
 
-
 MONO_END_DECLS
 
 #endif
diff --git a/src/mono/mono/mini/mono-private-unstable.h b/src/mono/mono/mini/mono-private-unstable.h
index 805edd25c4759c..1026ef2dd9ae9f 100644
--- a/src/mono/mono/mini/mono-private-unstable.h
+++ b/src/mono/mono/mini/mono-private-unstable.h
@@ -13,7 +13,17 @@
 #define __MONO_JIT_MONO_PRIVATE_UNSTABLE_H__
 
 #include <mono/utils/mono-publib.h>
+#include <mono/metadata/image.h>
 
-
+/* These are used to load the AOT data for aot images compiled with MONO_AOT_FILE_FLAG_SEPARATE_DATA */
+/*
+ * Return the AOT data for ASSEMBLY. SIZE is the size of the data. OUT_HANDLE should be set to a handle which is later
+ * passed to the free function.
+ */
+typedef unsigned char* (*MonoLoadAotDataFunc)          (MonoAssembly *assembly, int size, void* user_data, void **out_handle);
+/* Not yet used */
+typedef void  (*MonoFreeAotDataFunc)          (MonoAssembly *assembly, int size, void* user_data, void *handle);
+MONO_API MONO_RT_EXTERNAL_ONLY void
+mono_install_load_aot_data_hook (MonoLoadAotDataFunc load_func, MonoFreeAotDataFunc free_func, void* user_data);
 
 #endif /*__MONO_JIT_MONO_PRIVATE_UNSTABLE_H__*/
diff --git a/src/mono/mono/utils/mono-logger.c b/src/mono/mono/utils/mono-logger.c
index 174a2277db280e..14661d621a265d 100644
--- a/src/mono/mono/utils/mono-logger.c
+++ b/src/mono/mono/utils/mono-logger.c
@@ -449,6 +449,9 @@ mono_trace_set_log_handler (MonoLogCallback callback, void *user_data)
 {
 	g_assert (callback);
 
+	if (level_stack == NULL)
+		mono_trace_init ();
+
 	if (logCallback.closer != NULL)
 		logCallback.closer();
 	UserSuppliedLoggerUserData *ll = (UserSuppliedLoggerUserData*)g_malloc (sizeof (UserSuppliedLoggerUserData));
@@ -514,6 +517,8 @@ void
 mono_trace_set_print_handler (MonoPrintCallback callback)
 {
 	g_assert (callback);
+	if (level_stack == NULL)
+		mono_trace_init ();
 	print_callback = callback;
 	g_set_print_handler (print_handler);
 }
@@ -527,6 +532,8 @@ void
 mono_trace_set_printerr_handler (MonoPrintCallback callback)
 {
 	g_assert (callback);
+	if (level_stack == NULL)
+		mono_trace_init ();
 	printerr_callback = callback;
 	g_set_printerr_handler (printerr_handler);
 }
diff --git a/src/mono/netcore/sample/iOS/runtime.m b/src/mono/netcore/sample/iOS/runtime.m
index 05f4dd2c488c96..87eb4bce43e662 100644
--- a/src/mono/netcore/sample/iOS/runtime.m
+++ b/src/mono/netcore/sample/iOS/runtime.m
@@ -3,8 +3,10 @@
 #include <mono/utils/mono-logger.h>
 #include <mono/metadata/assembly.h>
 #include <mono/metadata/mono-debug.h>
+#include <mono/metadata/mono-gc.h>
 #include <mono/metadata/exception.h>
 #include <mono/jit/jit.h>
+#include <mono/jit/mono-private-unstable.h>
 
 #import <os/log.h>
 #include <sys/stat.h>
@@ -12,13 +14,6 @@
 
 static os_log_t stdout_log;
 
-/* These are not in public headers */
-typedef unsigned char* (*MonoLoadAotDataFunc) (MonoAssembly *assembly, int size, void *user_data, void **out_handle);
-typedef void  (*MonoFreeAotDataFunc) (MonoAssembly *assembly, int size, void *user_data, void *handle);
-void mono_install_load_aot_data_hook (MonoLoadAotDataFunc load_func, MonoFreeAotDataFunc free_func, void *user_data);
-void mono_trace_init (void);
-void mono_gc_init_finalizer_thread (void);
-
 static char *bundle_path;
 
 const char *
@@ -272,7 +267,6 @@ void mono_ios_setup_execution_mode (void)
     mono_install_assembly_preload_hook (assembly_preload_hook, NULL);
     mono_install_load_aot_data_hook (load_aot_data, free_aot_data, NULL);
     mono_install_unhandled_exception_hook (unhandled_exception_handler, NULL);
-    mono_trace_init ();
     mono_trace_set_log_handler (log_callback, NULL);
     mono_set_signal_chaining (TRUE);
     mono_set_crash_chaining (TRUE);