--- old/src/java.desktop/unix/native/common/java2d/x11/X11SurfaceData.c	2017-10-13 18:36:20.320559355 -0700
+++ new/src/java.desktop/unix/native/common/java2d/x11/X11SurfaceData.c	2017-10-13 18:36:20.148557685 -0700
@@ -1394,13 +1394,13 @@
 
     J2dTraceLn(J2D_TRACE_INFO, "in X11SurfaceData_XCreateGC");
 
-    xsdo = (X11SDOps *) pXSData;
+    xsdo = (X11SDOps *) jlong_to_ptr(pXSData);
     if (xsdo == NULL) {
         return 0L;
     }
 
     xsdo->javaGC = XCreateGC(awt_display, xsdo->drawable, 0, NULL);
-    ret = (jlong) xsdo->javaGC;
+    ret = ptr_to_jlong(xsdo->javaGC);
 #else /* !HEADLESS */
     ret = 0L;
 #endif /* !HEADLESS */
@@ -1419,7 +1419,7 @@
 {
 #ifndef HEADLESS
     J2dTraceLn(J2D_TRACE_INFO, "in X11SurfaceData_XResetClip");
-    XSetClipMask(awt_display, (GC) xgc, None);
+    XSetClipMask(awt_display, (GC) jlong_to_ptr(xgc), None);
 #endif /* !HEADLESS */
 }
 
@@ -1445,7 +1445,7 @@
             x1, y1, x2, y2, complexclip,
             &pRect, 256);
 
-    XSetClipRectangles(awt_display, (GC) xgc, 0, 0, pRect, numrects, YXBanded);
+    XSetClipRectangles(awt_display, (GC) jlong_to_ptr(xgc), 0, 0, pRect, numrects, YXBanded);
 
     if (pRect != rects) {
         free(pRect);
@@ -1464,7 +1464,7 @@
 {
 #ifndef HEADLESS
     J2dTraceLn(J2D_TRACE_INFO, "in X11SurfaceData_XSetCopyMode");
-    XSetFunction(awt_display, (GC) xgc, GXcopy);
+    XSetFunction(awt_display, (GC) jlong_to_ptr(xgc), GXcopy);
 #endif /* !HEADLESS */
 }
 
@@ -1479,7 +1479,7 @@
 {
 #ifndef HEADLESS
     J2dTraceLn(J2D_TRACE_INFO, "in X11SurfaceData_XSetXorMode");
-    XSetFunction(awt_display, (GC) xgc, GXxor);
+    XSetFunction(awt_display, (GC) jlong_to_ptr(xgc), GXxor);
 #endif /* !HEADLESS */
 }
 
@@ -1494,7 +1494,7 @@
 {
 #ifndef HEADLESS
     J2dTraceLn(J2D_TRACE_INFO, "in X11SurfaceData_XSetForeground");
-    XSetForeground(awt_display, (GC) xgc, pixel);
+    XSetForeground(awt_display, (GC) jlong_to_ptr(xgc), pixel);
 #endif /* !HEADLESS */
 }
 
@@ -1509,6 +1509,6 @@
 {
 #ifndef HEADLESS
     J2dTraceLn(J2D_TRACE_INFO, "in X11SurfaceData_XSetGraphicsExposures");
-    XSetGraphicsExposures(awt_display, (GC) xgc, needExposures ? True : False);
+    XSetGraphicsExposures(awt_display, (GC) jlong_to_ptr(xgc), needExposures ? True : False);
 #endif /* !HEADLESS */
 }