On Wed, 26 Jan 2022 20:03:21 GMT, Chris Plummer <cjplum...@openjdk.org> wrote:
> This test is failing in the loom repo when using -Xcomp. The reason is > because loom introduced doing a full GC in the codecache sweeper, which > causes the large array that the test allocates to be GC'd before the heap > dump is done. The fix is to make the large array static rather than a local > variable. > > I'm choosing to fix this in the jdk repo rather than the loom repo since it > is a latent bug that theoretically could occur even without the loom changes, > and also to help reduce the amount of changes to be reviewed when loom is > integrated into jdk. test/hotspot/jtreg/resourcehogs/serviceability/sa/LingeredAppWithLargeArray.java line 30: > 28: public static void main(String args[]) { > 29: hugeArray = new int[Integer.MAX_VALUE/2]; > 30: LingeredApp.main(args); Another option here is to use Reference.reachabilityFence(hugeArray). That makes it a bit more explicit/obvious that the test needs to keep hugeArray alive. ------------- PR: https://git.openjdk.java.net/jdk/pull/7236