On Tue, 25 Jun 2024 18:55:14 GMT, Robert Toyonaga <[email protected]> wrote:
> This PR changes GenerateJfrFiles.java so that the generated > `JfrNativeSettings` union does not include JFR structs.`JfrNativeSettings` is > meant to hold the settings for JFR events, but previously also included JFR > structs such as MetaspaceSizes, StackFrame, CopyFailed, > G1EvacuationStatistics, ObjectSpace, VirtualSpace. These are not events, but > instead are JFR `Type`s, and so do not have settings such as stacktraces or > thresholds. > > The inclusion of JFR structs in `JfrNativeSettings` was problematic because > it could cause a displacement between event ID and`JfrNativeSettings` array > index (each index is meant to correspond with a specific event ID). > > Testing: > - jdk/jdk/jfr > - tier1 All types in JFR is assigned an ID, regardless if they are events or a structs. If we are going to index into the array, with the event type ID, must not the holes be filled with something? Or are all native event type IDs first? ------------- PR Comment: https://git.openjdk.org/jdk/pull/19891#issuecomment-2192215608
