RFR: 8028498: runtime/SharedArchiveFile/CdsDifferentObjectAlignment.java asserts in RT_Baseline (original) (raw)

Jesper Wilhelmsson jesper.wilhelmsson at oracle.com
Wed Jan 29 07:06:57 PST 2014

Looks good! /Jesper

Stefan Johansson skrev 29/1/14 2:54 PM:

Hi,

Please review this fix for: https://bugs.openjdk.java.net/browse/JDK-8028498 Webrev: http://cr.openjdk.java.net/~sjohanss/8028498/webrev.00/ Summary: The initial young generation size has been fairly small by default (1.5M) and if setting ObjectAlignmentInBytes to something larger than the default it can causes CDS to trigger a GC when dumping the archive. At this point the VM is not ready to handle a GC and we will hit an assertion. Making sure we can handle a GC at this point is not trivial and the proposed solution is to alter the default sizing of the young generation as well as adding a safety check when dumping the archive to exit the VM if the young generation is too small. Testing: * JPRT build and test passes * Failing test now passes on all platforms (tested throught JPRT) * Verified that the GC and Runtime jtreg tests still passes Cheers, Stefan

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