8220718: Missing ResourceMark in nmethod::metadata_do

Reviewed-by: mdoerr, zgu

src/share/vm/code/nmethod.cpp

@@ -2176,6 +2176,7 @@ void nmethod::metadata_do(void f(Metadata*)) {
         }
       } else if (iter.type() == relocInfo::virtual_call_type) {
         // Check compiledIC holders associated with this nmethod
+        ResourceMark rm;
         CompiledIC *ic = CompiledIC_at(&iter);
         if (ic->is_icholder_call()) {
           CompiledICHolder* cichk = ic->cached_icholder();