8268563: mark hotspot serviceability/jvmti tests which ignore external VM flags

Reviewed-by: sspitsyn

test/hotspot/jtreg/serviceability/jvmti/CanGenerateAllClassHook/CanGenerateAllClassHook.java

@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2018, 2020, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2018, 2021, 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
@@ -29,6 +29,7 @@
  *          at ONLOAD and LIVE phases
  * @requires vm.jvmti
  * @requires vm.cds
+ * @requires vm.flagless
  * @library /test/lib
  * @compile CanGenerateAllClassHook.java
  * @run main/othervm/native CanGenerateAllClassHook

test/hotspot/jtreg/serviceability/jvmti/GetObjectSizeClass.java

@@ -31,6 +31,7 @@ import jdk.test.lib.process.ProcessTools;
  * @bug 8075030
  * @summary JvmtiEnv::GetObjectSize reports incorrect java.lang.Class instance size
  * @requires vm.jvmti
+ * @requires vm.flagless
  * @library /test/lib
  * @modules java.base/jdk.internal.misc
  *          java.compiler

test/hotspot/jtreg/serviceability/jvmti/RedefineClasses/RedefineLeak.java

@@ -26,6 +26,7 @@
  * @library /test/lib
  * @summary Test that redefinition reuses metaspace blocks that are freed
  * @requires vm.jvmti
+ * @requires vm.flagless
  * @modules java.base/jdk.internal.misc
  * @modules java.instrument
  *          jdk.jartool/sun.tools.jar

test/hotspot/jtreg/serviceability/jvmti/RedefineClasses/RedefinePreviousVersions.java

@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2016, 2020, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2016, 2021, 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
@@ -27,6 +27,7 @@
  * @summary Test has_previous_versions flag and processing during class unloading.
  * @requires vm.jvmti
  * @requires vm.opt.final.ClassUnloading
+ * @requires vm.flagless
  * @library /test/lib
  * @modules java.base/jdk.internal.misc
  * @modules java.compiler

test/hotspot/jtreg/serviceability/jvmti/RedefineClasses/RetransformClassesZeroLength.java

@@ -26,6 +26,7 @@
  * @bug 8198393
  * @summary Instrumentation.retransformClasses(new Class[0]) should be NOP
  * @requires vm.jvmti
+ * @requires vm.flagless
  * @library /test/lib
  * @modules java.instrument
  * @compile RetransformClassesZeroLength.java

test/hotspot/jtreg/serviceability/jvmti/RedefineClasses/TransformerDeadlockTest.java

@@ -27,6 +27,7 @@
  * @summary Test recursively retransforms the same class. The test hangs if
  *          a deadlock happens.
  * @requires vm.jvmti
+ * @requires vm.flagless
  * @library /test/lib
  * @modules java.instrument
  * @compile TransformerDeadlockTest.java