Request for review 8003705: CDS failed on Windows: cannot map in the CDS

Karen Kinnear karen.kinnear at
Thu Dec 20 10:41:34 PST 2012


Thank you for fixing these. The code in itself looks good.

How does it interact with NMT? We want to ensure that the CDS space shows up in NMT
on Windows as well - so if we skip the virtual mapping you may need to do that manually.


On Dec 20, 2012, at 12:09 PM, harold seigel wrote:

> Hi,
> Please review the following changes to fix bug 8003705.
> Summary:
> When trying to read the CDS file, the existing code was calling both the Windows VirtualAlloc() and MapViewOfFileEx() api's.  The calls to MapViewOfFileEx() were failing with ERROR_INVALID_ADDRESS because VirtualAlloc() had already reserved the memory.
> This fix prevents the call to VirtualAlloc(), allowing the MapViewOfFileEx() calls to succeed.
> Another problem was that 'java -Xshare:dump calls were unable to overwrite an existing CDS file.  This change fixes this by granting the owner full permission when creating the CDS file (mode o744).
> Open webrev at
> <>
> Bug link at
> Thanks!
> Harold

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