Fix crash with CheckUnhandledOops

Author: pron

src/hotspot/share/runtime/continuation.cpp

@@ -2928,7 +2928,11 @@ class Freeze {
       _cont.e_add_refs(_oops);
     }
 
-    if (!is_chunk()) {
+    _chunk = chunkh();
+
+    if (is_chunk()) {
+      _top_address = (intptr_t*)InstanceStackChunkKlass::start_of_stack(_chunk) + jdk_internal_misc_StackChunk::sp(_chunk); // TODO: add method to jdk_internal_misc_StackChunk
+    } else {
       _cont.add_size(_size); // chunk's size has already been added when originally freezing it
     }
 
@@ -2942,11 +2946,6 @@ class Freeze {
 
     // java_lang_Continuation::set_tail(_cont.mirror(), _cont.tail()); -- doesn't seem to help
 
-  if (is_chunk()) {
-    _chunk = chunkh();
-    _top_address = (intptr_t*)InstanceStackChunkKlass::start_of_stack(_chunk) + jdk_internal_misc_StackChunk::sp(_chunk); // TODO: add method to jdk_internal_misc_StackChunk
-  }
-
   #ifdef ASSERT
     hframe orig_top_frame = _cont.last_frame<mode_slow>();
     bool empty = _cont.is_empty();