HKEY_PERFORMANCE_DATA
In case someone has time to look at RAND_poll().
Here is a new KB article describing restrictions which can be placed on
Performance Data:
http://support.microsoft.com/default.aspx?scid=kb;en-us;146906
--
This KB article explains why using performance data on NT4 SP6 would
hang plus a workaround (use the Unicode version instead of the ANSI
version):
http://support.microsoft.com/default.aspx?scid=kb;en-us;226371
Therefore the call to RegQueryValueEx() must be replaced with
RegQueryValueExW() and TEXT("Global") should be replaced with L"Global".
--
This KB article explains why exceptions may be thrown or why the data
returned from a performance data call would be invalid:
http://support.microsoft.com/default.aspx?scid=kb;en-us;178887
We may need to wrap calls probing HKEY_PERFORMANCE_DATA in an exception
handling block.
Jeffrey Altman
smime.p7s
Description: S/MIME Cryptographic Signature
Re: HKEY_PERFORMANCE_DATA
If we're going to try exception handling then I suppose that CreateToolhelp32Snapshot
could be wrapped in a handler as well... although I'd still be worried that some
internal bit of Windows could be left in a state as a result of the exception.
At 14:40 08/08/03 -0400, you wrote:
>In case someone has time to look at RAND_poll().
>
>
>Here is a new KB article describing restrictions which can be placed on
>Performance Data:
>
> http://support.microsoft.com/default.aspx?scid=kb;en-us;146906
>
>--
>
>This KB article explains why using performance data on NT4 SP6 would
>hang plus a workaround (use the Unicode version instead of the ANSI
>version):
>
> http://support.microsoft.com/default.aspx?scid=kb;en-us;226371
>
>Therefore the call to RegQueryValueEx() must be replaced with
>RegQueryValueExW() and TEXT("Global") should be replaced with L"Global".
>
>--
>
>This KB article explains why exceptions may be thrown or why the data
>returned from a performance data call would be invalid:
>
> http://support.microsoft.com/default.aspx?scid=kb;en-us;178887
>
>We may need to wrap calls probing HKEY_PERFORMANCE_DATA in an exception
>handling block.
>
>Jeffrey Altman
>
>
>Attachment Converted: "D:\EudoraM\ATTACH\smime.p7s"
>
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Re: HKEY_PERFORMANCE_DATA
If you read the knowledge base article you will see that the exceptions are caught properly on Win2000 and above. However, on NT4 third party devices which plug-in to the performance engine did not always do the right thing and let exceptions slip out. I think this is what is causing the crashes on some servers and not others. There is still an issue of dependence on the COM engine. Services employing OpenSSL must be loaded after the DCOM service has started. Jeffrey Altman Martin Kochanski wrote: If we're going to try exception handling then I suppose that CreateToolhelp32Snapshot could be wrapped in a handler as well... although I'd still be worried that some > internal bit of Windows could be left in a state as a result of the exception. smime.p7s Description: S/MIME Cryptographic Signature
