Slow injection into Control-Flow-Guard-enabled program about detours

[asmichi]

Well, it's VirtualQueryEx that is taking time... So, what to be blamed is the kernel, and Windows 10 1809 seems to have fixed this.

Repro : https://gist.github.com/asmichi/1d86d5ca08a0ad6c36d1c0496bf9807c

Performing VirtualQueryEx on cmd.exe on Win10 Pro 1803 (Build 17134.376):

VirtualQueryEx time
     BaseAddress,      RegionSize,State,Type :          time / call
(snip)
00000153EC561000,    7ca1d9a7f000,   10,   0 :     0.4860 us / call
00007DF5C5FE0000,           2b000,    1,   4 :     2.1440 us / call
00007DF5C600B000,            5000,   10,   0 :     0.4740 us / call
00007DF5C6010000,         16f6000,    2,   4 : 21560.0600 us / call <- taking 21.6 ms / call !!!
00007DF5C7706000,          160000,    1,   4 :  2718.5530 us / call
00007DF5C7866000,          588000,    2,   4 : 10860.6580 us / call
00007DF5C7DEE000,            4000,    1,   4 :    53.5260 us / call
00007DF5C7DF2000,     1ffd9df5000,    2,   4 :  4191.0580 us / call
00007FF5A1BE7000,            3000,    1,   4 :     1.0450 us / call
00007FF5A1BEA000,        13808000,    2,   4 :   177.2590 us / call
00007FF5B53F2000,         1bf1000,    1,   4 :  1745.4760 us / call
00007FF5B6FE3000,            8000,    1,   4 :     1.4890 us / call
00007FF5B6FEB000,         f025000,    2,   4 :   448.1360 us / call
00007FF5C6010000,       1295d0000,   10,   0 :     0.4800 us / call

[asmichi]

Closing because this is an issue in the kernel. Feel free to reopen it if some workaround is required.