RFR: New code misses safe equals

[Aleksey Shipilev]

Obvious one:

diff -r 3061c352112d src/share/vm/classfile/protectionDomainCache.cpp
--- a/src/share/vm/classfile/protectionDomainCache.cpp	Wed Jul 12 18:50:02 2017
+0200
+++ b/src/share/vm/classfile/protectionDomainCache.cpp	Wed Jul 12 18:55:15 2017
+0200
@@ -117,7 +117,7 @@

 ProtectionDomainCacheEntry* ProtectionDomainCacheTable::find_entry(int index,
Handle protection_domain) {
   for (ProtectionDomainCacheEntry* e = bucket(index); e != NULL; e = e->next()) {
-    if (e->protection_domain() == protection_domain()) {
+    if (oopDesc::equals(e->protection_domain(), protection_domain())) {
       return e;
     }
   }

Thanks,
-Aleksey