Request for review 8005075: CDS archive with one alignment causes crash when run with different alignment
harold.seigel at oracle.com
Mon Dec 17 07:23:59 PST 2012
Please review the following change to fix bug 8005075.
Summary: This change prevents a crash when a CDS archive is created
with a value for -XX:+ObjectAlignmentInBytes that is smaller than the
ObjectAlignmentInBytes value used when running with -Xshare:on. This
fix stores the ObjectAlignmentInBytes in the CDS archive so that when
the archive is read, hotspot can compare the archive's alignment with
the current alignment and issue the following diagnostic if the
archive's alignment is too small:
An error has occurred while processing the shared archive file.
The shared archive file was created with a smaller Object Alignment
This webrev also cleans up some text in globals.hpp and fixes a small
problem with -XX:SharedReadOnlySize. The existing code was always
setting SharedReadOnlySize to 14M regardless of what was requested.
This prevented users from being able to expand the CDS archive's
Open webrev at http://cr.openjdk.java.net/~hseigel/bug_8005076/
Bug link at http://bugs.sun.com/view_bug.do?bug_id=8005076
The changes were tested with JCK, JPRT, JTREG, and UTE tests, and with
hand-run tests using different ObjectAlignmentInBytes values.
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