Getrandom syscall was introduced in version Linux kernel v3.17.
Can be disabled with -norandomguids command line option.
On my Ubuntu 18.04 test machine[**], single threaded perf is slightly slower,
but performance with multiple threads improves:
With Threads: 1, Calls: 1000000
FGenericPlatformMisc::CreateGuid: 0.316885 seconds
FPlatformMisc::CreateGuid: 0.544386 seconds
With Threads: 8, Calls: 1000000
FGenericPlatformMisc::CreateGuid: 5.867290 seconds
FPlatformMisc::CreateGuid: 3.035365 seconds
With Threads: 16, Calls: 1000000
FGenericPlatformMisc::CreateGuid: 10.914646 seconds
FPlatformMisc::CreateGuid: 5.897632 seconds
[**]
4.15.0-45-generic
Intel(R) Xeon(R) Gold 6134 CPU @ 3.20GHz)
Guids with getrandom() appear to be significantly more random:
0 GuidGeneric:{4240FA8F-08D6-974C-F710-112EB0D1AB97} GuidPlatform:{F49E1FFA-67A1-4702-B065-6E1B6385BC5E}
1 GuidGeneric:{4241444E-08D6-974C-F710-1296B0D1ABB9} GuidPlatform:{77D96835-24F5-4A27-B9E7-70985316285F}
2 GuidGeneric:{4242B446-08D6-974C-F710-13CCB0D1ABD9} GuidPlatform:{80C46DF2-6DD1-4B27-B1BD-CC279B5874A0}
3 GuidGeneric:{424386A9-08D6-974C-F710-1502B0D1ABF8} GuidPlatform:{5DA06154-78A5-47BB-A9A6-75B220950F31}
4 GuidGeneric:{424436F2-08D6-974C-F710-1638B0D1AC17} GuidPlatform:{880670CF-0ABF-491F-80A4-91C28B6D5B2F}
#jira UE-4447
#codereview Arciel.Rekman, Brandon.Schaefer
#review-5097118 @Arciel.Rekman, @Brandon.Schaefer
#fyi Chris.Babcock
#rb Arciel.Rekman, Brandon.Schaefer
[CL 5110574 by Michael Sartain in Dev-Editor branch]
Add support for MODULE_VTABLE for exposing the VTable (Also optionally if enabled RTTI) info for a given type for clang (Linux/Mac)
Rename command line arg bHideSymbolsByDefault to bPublicSymbolsByDefault, as well as now add support for setting this change the BuildConfiguration.xml file
Started from Github PR #3351 though a different way to go about it
#jira UE-42635
#rb Arciel.Rekman, Steve.Robb, Ben.Marsh, Michael.Trepka
#fyi Chris.Bunner, Chris.Gagnon
[CL 4923631 by Brandon Schaefer in Dev-Editor branch]
This is handled by the ELocTextPlatformSplitMode enum, used by FLocTextHelper (default is ELocTextPlatformSplitMode::None to preserve old behavior), and allows you to optionally split localization data for all platforms, or for any NDA restricted platforms. Note: Any localization data that is used by multiple platforms is still considered platform agnostic, even if it appears only within platform specific files.
#jira UE-65600
#rb Francis.Hurteau
#lockdown Matt.Kuhlenschmidt
[CL 4761508 by Jamie Dale in Dev-Editor branch]
