On Wed, 26 Jan 2022 20:03:21 GMT, Chris Plummer <[email protected]> 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.
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PR: https://git.openjdk.java.net/jdk/pull/7236
