Integrated: 8255598: [PPC64] assert(Universe::heap()->is_in(result)) failed: object not in heap
mdoerr at openjdk.java.net
Tue Nov 10 11:52:55 UTC 2020
On Thu, 5 Nov 2020 16:46:43 GMT, Martin Doerr <mdoerr at openjdk.org> wrote:
> JDK-8237363 introduced "assert(Universe::heap()->is_in..." check in CompressedOops::decode functions.
> This assertion restricts the usability of the decode functions. There are periods of time (during GC) at which we can't use " Universe::heap()->is_in" because the pointer gets switched between old and new location, but "Universe::heap()->is_in" is not yet accurate.
> PPC64 code has a usage of CompressedOops::decode which is affected by this problem. (It was observed with SerialGC, see JBS.)
> We could also use a weaker assertion, but seems like other people value the stronger assertion more. So I suggest to use decode_raw as workaround for PPC64.
This pull request has now been integrated.
Author: Martin Doerr <mdoerr at openjdk.org>
Stats: 5 lines in 1 file changed: 4 ins; 0 del; 1 mod
8255598: [PPC64] assert(Universe::heap()->is_in(result)) failed: object not in heap
Reviewed-by: ayang, tschatzl
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