8271829: mark hotspot runtime/Throwable tests which ignore external VM flags

Reviewed-by: jiefu

Author: iignatev

test/hotspot/jtreg/runtime/Throwable/StackTraceLogging.java

@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2016, 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
@@ -25,6 +25,7 @@
  * @test
  * @bug 8150778
  * @summary check stacktrace logging
+ * @requires vm.flagless
  * @library /test/lib
  * @modules java.base/jdk.internal.misc
  *          java.management

test/hotspot/jtreg/runtime/Throwable/TestCatchThrowableOOM.java

@@ -25,6 +25,7 @@
  * @test
  * @bug 8267118
  * @summary Test catching Throwable doesn't trigger OOME
+ * @requires vm.flagless
  * @library /test/lib
  * @run driver TestCatchThrowableOOM
  */

test/hotspot/jtreg/runtime/Throwable/TestMaxJavaStackTraceDepth.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
@@ -25,6 +25,7 @@
  * @test
  * @bug 7179701
  * @summary MaxJavaStackTraceDepth of zero is not handled correctly/consistently in the VM
+ * @requires vm.flagless
  * @modules java.base/jdk.internal.misc:open
  * @modules java.base/java.lang:open
  * @library /test/lib