Debuggers still crashing x64 guests

[Diggie_OC]

GUI 4.3.6r91406 Extension pack 4.3.6r91406 Additions 4.3.6r91406

Host: Windows 7 x64 SP1 Guest: Windows 7 x64 SP1

Problem:

1. Run any recent version of Ollydbg, e.g.:

​http://www.ollydbg.de/odbg201.zip

2. Try attaching to any process (Only 32-bit processes supported). I specifically launched the 32-bit version of Notepad and the attached to it using Ollydbg's "Attach" function:

"%WINDIR%\SysWOW64\Notepad.exe"

Both the debugger and debuggee in the guest OS will freeze every time, then after a few seconds the guest will crash and restart.

Exact same setup worked fine in 4.2.16 (July 4th, 2013 release), which is what I have resorted to using until recently due to a combination of issues with taking snapshots and other recent problems with debuggers.

Ollydbg seems to work on an comparably configured x86 guest in 4.3.6.

[aeichner]

Please reopen if still relevant with a recent VirtualBox release.