Function at 0x4520c0
Capabilities:
Check for time delay via queryperformancecounter
Execute anti-debugging instructions

Disassembly:
push ebp
mov ebp, esp
push ebx
push edi
push esi
and esp, 0xfffffff0
sub esp, 0x50
mov eax, dword [0x644040]
xor eax, ebp
mov dword [esp + 0x48], eax
movsd xmm1, qword [0x648750]
xorpd xmm0, xmm0
ucomisd xmm1, xmm0
jne 0x452273
jp 0x452273
mov esi, dword [sym.imp.KERNEL32.dll_GetCurrentThread]
call esi
push eax
call dword [sym.imp.KERNEL32.dll_GetThreadPriority]
mov dword [esp + 0x10], eax
call esi
push 2
push eax
call dword [sym.imp.KERNEL32.dll_SetThreadPriority]
mov eax, dword [0x648760]
mov ecx, dword [0x64783c]
mov edx, dword fs:[0x2c]
mov ecx, dword [edx + ecx*4]
cmp eax, dword [ecx + 4]
jle 0x45215e
push 0x648760
call fcn.00564ee8
add esp, 4
cmp dword [0x648760], 0xffffffff
jne 0x45215e
rdtsc
mov dword [0x648758], eax
mov dword [0x64875c], edx
push 0x648760
call fcn.00564f37
add esp, 4
mov eax, dword [0x648770]
mov ecx, dword [0x64783c]
mov edx, dword fs:[0x2c]
mov ecx, dword [edx + ecx*4]
cmp eax, dword [ecx + 4]
jle 0x4521c0
push 0x648770
call fcn.00564ee8
add esp, 4
cmp dword [0x648770], 0xffffffff
jne 0x4521c0
xor eax, eax
lea esi, [esp + 0x40]
mov dword [esi + 4], eax
mov dword [esi], eax
push esi
call dword [sym.imp.KERNEL32.dll_QueryPerformanceCounter]
mov eax, dword [esi]
mov ecx, dword [esi + 4]
mov dword [0x64876c], ecx
mov dword [0x648768], eax
push 0x648770
call fcn.00564f37
add esp, 4
rdtsc
mov dword [esp + 0xc], eax
mov dword [esp + 8], edx
xor eax, eax
lea esi, [esp + 0x40]
mov dword [esi + 4], eax
mov dword [esi], eax
push esi
call dword [sym.imp.KERNEL32.dll_QueryPerformanceCounter]
mov ebx, dword [esi]
mov edi, dword [esi + 4]
call dword [sym.imp.KERNEL32.dll_GetCurrentThread]
push dword [esp + 0x10]
push eax
call dword [sym.imp.KERNEL32.dll_SetThreadPriority]
xor eax, eax
mov dword [esi + 4], eax
mov dword [esi], eax
push esi
call dword [sym.imp.KERNEL32.dll_QueryPerformanceFrequency]
mov eax, dword [0x64876c]
mov ecx, dword [0x648768]
cmp ebx, ecx
mov edx, edi
sbb edx, eax
jl 0x45227b
sub ebx, ecx
movd xmm0, ebx
sbb edi, eax
movd xmm1, edi
punpckldq xmm0, xmm1
movq qword [esp + 0x30], xmm0
fild qword [esp + 0x30]
fstp qword [esp + 0x28]
movsd xmm0, qword [esp + 0x28]
fild qword [esp + 0x40]
fstp qword [esp + 0x38]
divsd xmm0, qword [esp + 0x38]
xorps xmm2, xmm2
movsd xmm1, qword [0x6266a0]
ucomisd xmm1, xmm0
jbe 0x4522ba
movaps xmmword [esp + 0x10], xmm2
mov ecx, dword [esp + 0x48]
xor ecx, ebp
call fcn.00568175
movaps xmm0, xmmword [esp + 0x10]
lea esp, [ebp - 0xc]
pop esi
pop edi
pop ebx
pop ebp
ret
movapd xmmword [esp + 0x10], xmm1
jmp 0x45225b
call fcn.00564ed5
push dword [eax]
call fcn.0057f33f
add esp, 4
mov esi, eax
call fcn.00564ed5
mov edi, dword [eax]
push 0x6266a8
call fcn.00597670
add esp, 4
push esi
push edi
push str.PERFETTO_CHECK_perf_counter_now___perf_counter_initial_
push str._s__errno:__d___s_
push 0x5b
push eax
push 3
call fcn.005982b0
add esp, 0x1c
int3
mov eax, dword [0x64875c]
mov ecx, dword [0x648758]
cmp dword [esp + 0xc], ecx
mov edx, dword [esp + 8]
sbb edx, eax
jb 0x452322
mov edx, dword [esp + 0xc]
sub edx, ecx
mov ecx, dword [esp + 8]
sbb ecx, eax
movd xmm1, edx
movd xmm2, ecx
punpckldq xmm1, xmm2
punpckldq xmm1, xmmword [0x626680]
subpd xmm1, xmmword [0x626690]
haddpd xmm1, xmm1
divsd xmm1, xmm0
movsd qword [esp + 0x20], xmm1
movsd xmm0, qword [esp + 0x20]
movlpd qword [0x648750], xmm0
movsd xmm2, qword [0x648750]
jmp 0x452256
call fcn.00564ed5
push dword [eax]
call fcn.0057f33f
add esp, 4
mov esi, eax
call fcn.00564ed5
mov edi, dword [eax]
push 0x6266a8
call fcn.00597670
add esp, 4
push esi
push edi
push str.PERFETTO_CHECK_tsc_now___tsc_initial_
push str._s__errno:__d___s_
push 0x66
jmp 0x4522ae