test/hotspot/gtest/oops/test_markWord.cpp

rev 58110 : v2.09a with 8235795, 8235931 and 8236035 extracted; rebased to jdk-14+28; merge with 8236035.patch.cr1; merge with 8235795.patch.cr1; merge with 8236035.patch.cr2; merge with 8235795.patch.cr2; merge with 8235795.patch.cr3.
rev 58111 : See CR9-to-CR10-changes; merge with jdk-15+11.

*** 1,7 ****
  /*
!  * Copyright (c) 2019, Oracle and/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
   * published by the Free Software Foundation.
--- 1,7 ----
  /*
!  * Copyright (c) 2019, 2020, Oracle and/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
   * published by the Free Software Foundation.
*** 121,130 ****
--- 121,134 ----
    }
  
    // This is no longer biased, because ObjectLocker revokes the bias.
    assert_test_pattern(h_obj, "is_neutral no_hash");
  
+   // Hash the object then print it.
+   intx hash = h_obj->identity_hash();
+   assert_test_pattern(h_obj, "is_neutral hash=0x");
+ 
    // Wait gets the lock inflated.
    {
      ObjectLocker ol(h_obj, THREAD);
  
      Semaphore done(0);
*** 135,150 ****
--- 139,158 ----
      ol.wait(THREAD);
      assert_test_pattern(h_obj, "monitor");
      done.wait_with_safepoint_check(THREAD);  // wait till the thread is done.
    }
  
+   if (!AsyncDeflateIdleMonitors) {
+     // With AsyncDeflateIdleMonitors, the collect() call below
+     // does not guarantee monitor deflation.
      // Make the object older. Not all GCs use this field.
      Universe::heap()->collect(GCCause::_java_lang_system_gc);
      if (UseParallelGC) {
        assert_test_pattern(h_obj, "is_neutral no_hash age 1");
      }
  
      // Hash the object then print it.
      intx hash = h_obj->identity_hash();
      assert_test_pattern(h_obj, "is_neutral hash=0x");
+   }
  }
  #endif // PRODUCT