Fix py 3.9 [WinError 998] Invalid access to memory location #1866
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https://ci.appveyor.com/project/giampaolo/psutil/builds/36062436/job/vqqn6ayac5fwsfvp
This occurs on python 3.9 only, which on Appveyor uses Visual Studio 2019 + Windows PE.
Unfortunately I cannot reproduce this by using VS 2019 on Windows 10.
The problem is
ReadProcessMemoryandNtWow64QueryInformationProcess64suddenly returningERROR_NOACCESS. In that case I turnedERROR_NOACCESSintoAccessDeniedfor lack of a better solution.This means that unfortunately on Python 3.9 we will get more
AccessDeniedon cmdline(), cwd() and environ() when querying high-privileged processes.CC-ing @fbenkstein @EccoTheFlintstone as they worked on this part.