--- a/make/lib/Awt2dLibraries.gmk	Wed Nov 21 15:22:57 2018 +0100
+++ b/make/lib/Awt2dLibraries.gmk	Wed Nov 21 15:22:28 2018 +0100
@@ -280,7 +280,7 @@
         common/font \
         #
 
-    LIBAWT_XAWT_EXCLUDES := medialib
+    LIBAWT_XAWT_EXCLUDES := medialib debug
 
     LIBAWT_XAWT_EXTRA_HEADER_DIRS := \
         $(LIBAWT_DEFAULT_HEADER_DIRS) \

--- a/src/java.desktop/share/native/common/awt/debug/debug_assert.c	Wed Nov 21 15:22:57 2018 +0100
+++ b/src/java.desktop/share/native/common/awt/debug/debug_assert.c	Wed Nov 21 15:22:28 2018 +0100
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 1999, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 1999, 2018, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
@@ -33,7 +33,9 @@
 
 static DASSERT_CALLBACK PfnAssertCallback = NULL;
 
-void DAssert_Impl(const char *msg, const char * filename, int linenumber) {
+/* JNIEXPORT because this function is also called from libawt_xawt */
+JNIEXPORT void JNICALL
+DAssert_Impl(const char *msg, const char * filename, int linenumber) {
     if (PfnAssertCallback != NULL) {
         (*PfnAssertCallback)(msg, filename, linenumber);
     } else {

--- a/src/java.desktop/share/native/common/awt/debug/debug_assert.h	Wed Nov 21 15:22:57 2018 +0100
+++ b/src/java.desktop/share/native/common/awt/debug/debug_assert.h	Wed Nov 21 15:22:28 2018 +0100
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 1999, 2012, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 1999, 2018, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
@@ -54,7 +54,8 @@
 /* prototype for assert function */
 typedef void (*DASSERT_CALLBACK)(const char * msg, const char * file, int line);
 
-extern void DAssert_Impl(const char * msg, const char * file, int line);
+/* JNIEXPORT because this function is also called from libawt_xawt */
+JNIEXPORT void JNICALL DAssert_Impl(const char * msg, const char * file, int line);
 extern void DAssert_SetCallback( DASSERT_CALLBACK pfn );
 
 #else /* DEBUG not defined */

--- a/src/java.desktop/share/native/common/awt/debug/debug_trace.c	Wed Nov 21 15:22:57 2018 +0100
+++ b/src/java.desktop/share/native/common/awt/debug/debug_trace.c	Wed Nov 21 15:22:28 2018 +0100
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 1999, 2001, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 1999, 2018, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
@@ -237,16 +237,20 @@
 
 /*
  * Called via DTRACE_PRINT macro. Outputs printf style formatted text.
+ * JNIEXPORT because these functions are also called from libawt_xawt.
  */
-void DTrace_VPrint( const char * file, int line, int argc, const char * fmt, va_list arglist ) {
+JNIEXPORT void JNICALL
+DTrace_VPrint( const char * file, int line, int argc, const char * fmt, va_list arglist ) {
     DASSERT(fmt != NULL);
     DTrace_VPrintImpl(fmt, arglist);
 }
 
 /*
  * Called via DTRACE_PRINTLN macro. Outputs printf style formatted text with an automatic newline.
+ * JNIEXPORT because these functions are also called from libawt_xawt.
  */
-void DTrace_VPrintln( const char * file, int line, int argc, const char * fmt, va_list arglist ) {
+JNIEXPORT void JNICALL
+DTrace_VPrintln( const char * file, int line, int argc, const char * fmt, va_list arglist ) {
     DTrace_VPrintImpl(fmt, arglist);
     DTrace_PrintImpl("\n");
 }
@@ -254,10 +258,12 @@
 /*
  * Called via DTRACE_ macros. If tracing is enabled at the given location, it enters
  * the trace mutex and invokes the callback function to output the trace.
+ * JNIEXPORT because these functions are also called from libawt_xawt.
  */
-void DTrace_PrintFunction( DTRACE_PRINT_CALLBACK pfn, dtrace_id * pFileTraceId, dtrace_id * pLineTraceId,
-                           const char * file, int line,
-                           int argc, const char * fmt, ... ) {
+JNIEXPORT void JNICALL
+DTrace_PrintFunction( DTRACE_PRINT_CALLBACK pfn, dtrace_id * pFileTraceId, dtrace_id * pLineTraceId,
+                      const char * file, int line,
+                      int argc, const char * fmt, ... ) {
     va_list     arglist;
 
     DASSERT(file != NULL);

--- a/src/java.desktop/share/native/common/awt/debug/debug_trace.h	Wed Nov 21 15:22:57 2018 +0100
+++ b/src/java.desktop/share/native/common/awt/debug/debug_trace.h	Wed Nov 21 15:22:28 2018 +0100
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 1999, 2012, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 1999, 2018, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
@@ -59,11 +59,12 @@
 void DTrace_DisableMutex();
 extern void DTrace_VPrintImpl(const char * fmt, va_list arglist);
 extern void DTrace_PrintImpl(const char * fmt, ...);
-extern void DTrace_PrintFunction(DTRACE_PRINT_CALLBACK pfn, dtrace_id * pFileTraceId, dtrace_id * pTraceId, const char * file, int line, int argc, const char * fmt, ...);
+/* JNIEXPORT because these functions are also called from libawt_xawt */
+JNIEXPORT void JNICALL DTrace_PrintFunction(DTRACE_PRINT_CALLBACK pfn, dtrace_id * pFileTraceId, dtrace_id * pTraceId, const char * file, int line, int argc, const char * fmt, ...);
 
 /* these functions are exported only for use in macros-- do not call them directly!!! */
-extern void DTrace_VPrint(const char * file, int line, int argc, const char * fmt, va_list arglist);
-extern void DTrace_VPrintln(const char * file, int line, int argc, const char * fmt, va_list arglist);
+JNIEXPORT void JNICALL DTrace_VPrint(const char * file, int line, int argc, const char * fmt, va_list arglist);
+JNIEXPORT void JNICALL DTrace_VPrintln(const char * file, int line, int argc, const char * fmt, va_list arglist);
 
 /* each file includes this flag indicating module trace status */
 static dtrace_id        _Dt_FileTraceId = UNDEFINED_TRACE_ID;