DrCov crash on Windows 10 x64 when tracing Notepad File Open Dialog

Created by: richinseattle

I tested this on both 6.2.0 and latest git today, I'm posting crash info from the 6.2.0 build since you have those binaries. This occurs when doing File->Open in Notepad. The dialog partially renders and then crashes.

$ bin64/drrun.exe -t drcov -- /c/windows/notepad.exe <Application C:\windows\notepad.exe (12392). DrCov internal crash at PC 0x000000007109dbe4. Please report this at http://dynamorio.org/issues. Program aborted. 0xc0000005 0x00000000 0x000000007109dbe4 0x000000007109dbe4 0x0000000000000000 0xffffffffffffffb1 Base: 0x0000000071000000 Registers: eax=0x00007ff6598f2e01 ebx=0x0000000000000000 ecx=0x0000000000000000 edx=0x0000000000000018 esi=0x00000000710654c6 edi=0x00007ff6598f2e01 esp=0x00007ff65996edf0 ebp=0x0000000000000001 r8 =0x0000000000000018 r9 =0x00007ff65996e6d8 r10=0x0000000000000000 r11=0x00007ff65996ede0 r12=0x0000000000000004 r13=0x00007ff659952080 r14=0x00000000710ecb70 r15=0x0000000000000001 eflags=0x00007ff600010206 version 6.2.0, build 2 -no_dynamic_options -client_lib 'C:\Code\disas_benchmark\DynamoRIO-Windows-6.2.0-2\tools\lib64\release\drcov.dll;0;' -code_api -probe_api -stack_size 56K -nop_initial_bblock -max_elide_jmp 0 -max_elide_call 0 -no_inline_ignored_syscalls -native_exec_default_list '' -no_native_exec_managed_code -no_indcall2direct -pad_jmp>