RFR: 8361639: JFR: Incorrect top frame for I/O events

[Alan Bateman]

On Wed, 9 Jul 2025 05:49:30 GMT, Erik Gahlin <egahlin at openjdk.org> wrote:

> Could I have a review of the change that ensures that the top frame for I/O events is not an internal JDK method, such as FileReadEvent::offer? This change is dependent on [JDK-8361640](https://bugs.openjdk.org/browse/JDK-8361640).
> 
> Testing: tier1, tier2 + jdk/jdk/jfr
> 
> Thanks
> Erik

test/jdk/jdk/jfr/event/io/TestIOTopFrame.java line 88:

> 86:     }
> 87: 
> 88:     private static void testFileRead() throws Exception {

In addition to java.io, there will be FileRead/FileWrite events recorded for the stream/channels created with Files.newXXX methods.

test/jdk/jdk/jfr/event/io/TestIOTopFrame.java line 200:

> 198:             fc.read(buffers[0]); // 19
> 199:             if (fc.read(buffers) < 1) { // 20
> 200:                 throw new Exception("Expected som bytes to be read");

som -> some

-------------

PR Review Comment: https://git.openjdk.org/jdk/pull/26211#discussion_r2210963422
PR Review Comment: https://git.openjdk.org/jdk/pull/26211#discussion_r2210961074