RFR: 8338411: Implement JEP 486: Permanently Disable the Security Manager [v3]

[Alexey Ivanov]

On Fri, 25 Oct 2024 17:30:56 GMT, Harshitha Onkar <honkar at openjdk.org> wrote:

>> test/jdk/javax/swing/JPopupMenu/6694823/bug6694823.java line 41:
>> 
>>> 39:  * @bug 6694823
>>> 40:  * @summary Checks that popup menu cannot be partially hidden
>>> 41:  *          by the task bar.
>> 
>> I believe this test is irrelevant without the security manager.
>> 
>> The test above, `test/jdk/javax/swing/JPopupMenu/6691503/bug6691503.java` asserts that popup menus in applets don't have their always-on-top flag set to true, therefore such popups will be displayed below the taskbar.
>> 
>> Popup menus in stand-alone apps have their always-on-top flag set to true, therefore they can be displayed on top of the taskbar.
>> 
>> We have a specific test which verifies [`TaskbarPositionTest.java`](https://github.com/openjdk/jdk/blob/master/test/jdk/javax/swing/Popup/TaskbarPositionTest.java) that a popup menu could overlap the taskbar.
>
> This particular test was failing on windows & linux after SM removal. There is a functional issue and for that reason I think it is better to retain this test. Details documented here - [JDK-8342012](https://bugs.openjdk.org/browse/JDK-8342012)

The updated test `bug6694823.java` works correctly on Windows and displays its popup over the Windows taskbar — it is expected.

The popup had to be moved if the security manager didn't allow to call `setAlwaysOnTop(true)`.

> There is a functional issue and for that reason I think it is better to retain this test. Details documented here - [JDK-8342012](https://bugs.openjdk.org/browse/JDK-8342012)

There's no functional issue. The `bug6694823.java` test was designed to pass **with the security manager**.

The `bug6694823.java` test fails without the security manager because the conditions don't hold any more.

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PR Review Comment: https://git.openjdk.org/jdk/pull/21498#discussion_r1817116860