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8255995: templateTable_x86.cpp (TemplateTable::if_acmp) not always do correct null check. #266

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@MrSimms MrSimms commented Nov 17, 2020

Testing both pointers at the same time, doesn't account for the case where bits
completely miss each other, resulting in zero as result e.g.

test(0x10, 0x01) == 0x10 & 0x01 == 0, yet neither are null


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  • JDK-8255995: templateTable_x86.cpp (TemplateTable::if_acmp) not always do correct null check.



$ git fetch pull/266/head:pull/266
$ git checkout pull/266

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@bridgekeeper bridgekeeper bot commented Nov 17, 2020

👋 Welcome back dsimms! A progress list of the required criteria for merging this PR into lworld will be added to the body of your pull request. There are additional pull request commands available for use with this pull request.

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@openjdk openjdk bot commented Nov 17, 2020

@MrSimms This change now passes all automated pre-integration checks.

ℹ️ This project also has non-automated pre-integration requirements. Please see the file for details.

After integration, the commit message for the final commit will be:

8255995: templateTable_x86.cpp (TemplateTable::if_acmp) not always do correct null check.

Reviewed-by: fparain, thartmann

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@MrSimms MrSimms commented Nov 18, 2020


@openjdk openjdk bot closed this Nov 18, 2020
@openjdk openjdk bot added integrated and removed ready rfr labels Nov 18, 2020
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@openjdk openjdk bot commented Nov 18, 2020

@MrSimms Pushed as commit e9217da.

💡 You may see a message that your pull request was closed with unmerged commits. This can be safely ignored.

@MrSimms MrSimms deleted the 8255995 branch Nov 19, 2020
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