src/hotspot/share/gc/shenandoah/shenandoahAsserts.hpp

@@ -1,7 +1,7 @@
  /*
-  * Copyright (c) 2018, 2019, Red Hat, Inc. All rights reserved.
+  * Copyright (c) 2018, 2025, Red Hat, Inc. All rights reserved.
   * Copyright Amazon.com Inc. or its affiliates. All Rights Reserved.
   * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   *
   * This code is free software; you can redistribute it and/or modify it
   * under the terms of the GNU General Public License version 2 only, as

@@ -25,10 +25,11 @@
  
  #ifndef SHARE_GC_SHENANDOAH_SHENANDOAHASSERTS_HPP
  #define SHARE_GC_SHENANDOAH_SHENANDOAHASSERTS_HPP
  
  #include "memory/iterator.hpp"
+ #include "oops/compressedKlass.hpp"
  #include "runtime/mutex.hpp"
  #include "utilities/formatBuffer.hpp"
  
  typedef FormatBuffer<8192> ShenandoahMessageBuffer;
  

@@ -75,10 +76,15 @@
    static void assert_heaplocked_or_safepoint(const char* file, int line);
    static void assert_control_or_vm_thread_at_safepoint(bool at_safepoint, const char* file, int line);
    static void assert_generational(const char* file, int line);
    static void assert_generations_reconciled(const char* file, int line);
  
+   // Given a possibly invalid oop, extract narrowKlass (if UCCP) and Klass*
+   // from it safely.
+   // Note: For -UCCP, returned nk is always 0.
+   static bool extract_klass_safely(oop obj, narrowKlass& nk, const Klass*& k);
+ 
  #ifdef ASSERT
  #define shenandoah_assert_in_heap_bounds(interior_loc, obj) \
                      ShenandoahAsserts::assert_in_heap_bounds(interior_loc, obj, __FILE__, __LINE__)
  #define shenandoah_assert_in_heap_bounds_or_null(interior_loc, obj) \
                      ShenandoahAsserts::assert_in_heap_bounds_or_null(interior_loc, obj, __FILE__, __LINE__)