RFR(M): 8048521 - Remove obsolete code from os_windows.cpp/hpp

[Christian Tornqvist]

Hi everyone,

 

Please review this change that removes a lot of obsolete code from
os_windows.cpp/hpp and related files. Changes include:

 

*         Remove is_nt() check and dead code related to it

*         Remove win32::__has_performance_count() and related dead code
since the MSDN page for QueryPerformanceFrequency says: "On systems that run
Windows XP or later, the function will always succeed and will thus never
return zero."

*         Remove the check for API's that are always present in all our
supported Windows versions

 

Webrev:

http://cr.openjdk.java.net/~ctornqvi/webrev/8048521/webrev.00/

 

Bug:

https://bugs.openjdk.java.net/browse/JDK-8048521

 

Change was tested on Windows 32/64-bit using
hotspot/test/:hotspot_all,jdk/test/:tier1,jdk/test/:tier2

 

Thanks,

Christian