[Vm-dev] Integer overflow with BitBlt rule 20 and depth 32

David T. Lewis lewis at mail.msen.com
Mon Nov 2 11:58:22 UTC 2009

On Thu, Oct 29, 2009 at 10:10:42PM -0400, David T. Lewis wrote:
> Juan provided six new tests (see Mantis 7047) that document the problems.
> I added these six tests to the trunk today, and also updated VMMaker on
> SqueakSource with Juan's fixes for bitblt simulation (mainly some memory
> access methods that had apparently been overlooked during the original
> Squeak 64 bit work).
> Juan's patches (VMMaker-BitBlt-AlphaFixes-jmv-M7407.cs on Mantis 7047)
> do resolve the problems in the VM, and the changes all look correct to me
> (but I have no experience with bitblt, so I'm just commenting on the fixes
> for type declarations and arithmetic overflow). 
> Has anyone else had a chance to review this? If there are no issues or
> concerns, I will add Juan's alpha fixes to VMMaker.

Added to VMMaker-dtl.147 on SqueakSource. The new tests are now in Squeak
trunk, and corresponding fixes are in VMMaker. The issue is set to "testing"
in Mantis 7407.


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