--- a/src/hotspot/share/gc/shenandoah/shenandoahAsserts.cpp	Thu Oct 17 20:27:44 2019 +0100
+++ b/src/hotspot/share/gc/shenandoah/shenandoahAsserts.cpp	Thu Oct 17 20:53:35 2019 +0100
@@ -61,7 +61,7 @@
   r->print_on(&ss);
 
   stringStream mw_ss;
-  obj->mark()->print_on(&mw_ss);
+  obj->mark().print_on(&mw_ss);
 
   ShenandoahMarkingContext* const ctx = heap->marking_context();
 
@@ -142,7 +142,7 @@
   if (level >= _safe_oop) {
     oop fwd = (oop) ShenandoahForwarding::get_forwardee_raw_unchecked(obj);
     msg.append("Forwardee:\n");
-    if (!oopDesc::equals_raw(obj, fwd)) {
+    if (obj != fwd) {
       if (level >= _safe_oop_fwd) {
         print_obj(msg, fwd);
       } else {
@@ -157,7 +157,7 @@
   if (level >= _safe_oop_fwd) {
     oop fwd = (oop) ShenandoahForwarding::get_forwardee_raw_unchecked(obj);
     oop fwd2 = (oop) ShenandoahForwarding::get_forwardee_raw_unchecked(fwd);
-    if (!oopDesc::equals_raw(fwd, fwd2)) {
+    if (fwd != fwd2) {
       msg.append("Second forwardee:\n");
       print_obj_safe(msg, fwd2);
       msg.append("\n");
@@ -203,7 +203,7 @@
 
   oop fwd = oop(ShenandoahForwarding::get_forwardee_raw_unchecked(obj));
 
-  if (!oopDesc::equals_raw(obj, fwd)) {
+  if (obj != fwd) {
     // When Full GC moves the objects, we cannot trust fwdptrs. If we got here, it means something
     // tries fwdptr manipulation when Full GC is running. The only exception is using the fwdptr
     // that still points to the object itself.
@@ -235,7 +235,7 @@
 
     // Step 4. Check for multiple forwardings
     oop fwd2 = oop(ShenandoahForwarding::get_forwardee_raw_unchecked(fwd));
-    if (!oopDesc::equals_raw(fwd, fwd2)) {
+    if (fwd != fwd2) {
       print_failure(_safe_all, obj, interior_loc, NULL, "Shenandoah assert_correct failed",
                     "Multiple forwardings",
                     file, line);
@@ -278,7 +278,7 @@
   assert_correct(interior_loc, obj, file, line);
   oop fwd = oop(ShenandoahForwarding::get_forwardee_raw_unchecked(obj));
 
-  if (oopDesc::equals_raw(obj, fwd)) {
+  if (obj == fwd) {
     print_failure(_safe_all, obj, interior_loc, NULL, "Shenandoah assert_forwarded failed",
                   "Object should be forwarded",
                   file, line);
@@ -289,7 +289,7 @@
   assert_correct(interior_loc, obj, file, line);
   oop fwd = oop(ShenandoahForwarding::get_forwardee_raw_unchecked(obj));
 
-  if (!oopDesc::equals_raw(obj, fwd)) {
+  if (obj != fwd) {
     print_failure(_safe_all, obj, interior_loc, NULL, "Shenandoah assert_not_forwarded failed",
                   "Object should not be forwarded",
                   file, line);
@@ -362,3 +362,16 @@
                      file, line);
   }
 }
+
+void ShenandoahAsserts::assert_locked_or_shenandoah_safepoint(Mutex* lock, const char* file, int line) {
+  if (ShenandoahSafepoint::is_at_shenandoah_safepoint()) {
+    return;
+  }
+
+  if (lock->owned_by_self()) {
+    return;
+  }
+
+  ShenandoahMessageBuffer msg("Must ba at a Shenandoah safepoint or held %s lock", lock->name());
+  report_vm_error(file, line, msg.buffer());
+}