RFR: JDK-8357082 : Stabilize and add debug logs to CopyAreaOOB.java

[Sergey Bylokhov]

On Sat, 17 May 2025 00:03:23 GMT, Harshitha Onkar <honkar at openjdk.org> wrote:

> CopyAreaOOB.java was failing intermittently on some platforms on CI but recently it started to fail more frequently on macos-aarch64 when the entire test suite runs.
> 
> Test failure is not reproducible when the test is run individually (multiple times) on CI.
> 
> Rewritten the test and added debug logs that will be helpful to figure out the issue. 
> 
> - Added code to capture screenshot (entire screen as well as the frame) in case of failure.
> - Since it tests multiple regions added a StringBuffer to consolidate the error logs before throwing RuntimeException.

test/jdk/java/awt/Graphics2D/CopyAreaOOB.java line 88:

> 86: 
> 87:     private static void createTestUI() {
> 88:         frame = new Frame();

You do not need to call all these methods on the EDT, these are AWT components that should handle multithreaded usage (main/EDT/toolkit threads). It is possible that the issue is only reproducible on macOS due to synchronization problems related to the metal pipeline?

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PR Review Comment: https://git.openjdk.org/jdk/pull/25279#discussion_r2094728292