--- a/hotspot/src/share/vm/classfile/placeholders.cpp	Wed Aug 02 08:19:09 2017 -0400
+++ b/hotspot/src/share/vm/classfile/placeholders.cpp	Wed Aug 02 10:52:50 2017 -0400
@@ -175,39 +175,6 @@
     : Hashtable<Symbol*, mtClass>(table_size, sizeof(PlaceholderEntry)) {
 }
 
-#ifndef PRODUCT
-// Note, doesn't append a cr
-void PlaceholderEntry::print() const {
-  klassname()->print_value();
-  if (loader_data() != NULL) {
-    tty->print(", loader ");
-    loader_data()->print_value();
-  }
-  if (supername() != NULL) {
-    tty->print(", supername ");
-    supername()->print_value();
-  }
-  if (definer() != NULL) {
-    tty->print(", definer ");
-    definer()->print_value();
-  }
-  if (instance_klass() != NULL) {
-    tty->print(", InstanceKlass ");
-    instance_klass()->print_value();
-  }
-  tty->print("\n");
-  tty->print("loadInstanceThreadQ threads:");
-  loadInstanceThreadQ()->printActionQ();
-  tty->print("\n");
-  tty->print("superThreadQ threads:");
-  superThreadQ()->printActionQ();
-  tty->print("\n");
-  tty->print("defineThreadQ threads:");
-  defineThreadQ()->printActionQ();
-  tty->print("\n");
-}
-#endif
-
 void PlaceholderEntry::verify() const {
   guarantee(loader_data() != NULL, "Must have been setup.");
   guarantee(loader_data()->class_loader() == NULL || loader_data()->class_loader()->is_instance(),
@@ -222,20 +189,48 @@
 }
 
 
-#ifndef PRODUCT
-void PlaceholderTable::print() {
-  tty->print_cr("Placeholder table table_size=%d, entries=%d",
+// Note, doesn't append a cr
+// Can't call this print_on because HashtableEntry doesn't initialize its vptr
+// and print_on is a virtual function so the vptr call crashes.
+void PlaceholderEntry::print_entry(outputStream* st) const {
+  klassname()->print_value_on(st);
+  if (loader_data() != NULL) {
+    st->print(", loader ");
+    loader_data()->print_value_on(st);
+  }
+  if (supername() != NULL) {
+    st->print(", supername ");
+    supername()->print_value_on(st);
+  }
+  if (definer() != NULL) {
+    st->print(", definer ");
+    definer()->print_value_on(st);
+  }
+  if (instance_klass() != NULL) {
+    st->print(", InstanceKlass ");
+    instance_klass()->print_value_on(st);
+  }
+  st->cr();
+  st->print("loadInstanceThreadQ threads:");
+  loadInstanceThreadQ()->print_action_queue(st);
+  st->cr();
+  st->print("superThreadQ threads:");
+  superThreadQ()->print_action_queue(st);
+  st->cr();
+  st->print("defineThreadQ threads:");
+  defineThreadQ()->print_action_queue(st);
+  st->cr();
+}
+
+void PlaceholderTable::print_on(outputStream* st) const {
+  st->print_cr("Placeholder table (table_size=%d, placeholders=%d)",
                 table_size(), number_of_entries());
   for (int pindex = 0; pindex < table_size(); pindex++) {
     for (PlaceholderEntry* probe = bucket(pindex);
                            probe != NULL;
                            probe = probe->next()) {
-      tty->print("%4d: ", pindex);
-      tty->print(" place holder ");
-
-      probe->print();
-      tty->cr();
+      st->print("%4d: placeholder ", pindex);
+      probe->print_entry(st);
     }
   }
 }
-#endif