Opened 11 years ago
Closed 11 years ago
#11302 closed defect (duplicate)
Hardware Breakpoints not tirggered without vt-x
| Reported by: | hwbpfan | Owned by: | |
|---|---|---|---|
| Component: | VMM | Version: | VirtualBox 4.2.4 |
| Keywords: | hwbp, hardware breakpoint | Cc: | |
| Guest type: | all | Host type: | all |
Description
hello,
hardware Breakpoints are a basic cpu feature of the x86 and x64 architectures. In virtualbox, this feature does not work if vt-x is disabled or not present, even though HWBPs have nothing to do with vt-x.
the problem has been previously mentioned and partly resolved here:
virtualbox.org/ticket/477
but is still present in latest version 424. The expected interrupts are just swallowed by the VMM.
To reproduce this issue, disable vt-x for a specific machine and use your favourite debugger to set a hardware breakpoint. I suggest you try windows+ollydbg (ollydbg.de), as it`s very easy to use.
Didnt attach any logs as it?s very easy to reproduce on any machine and there`s nothing interesting in the logs.
Change History (2)
comment:1 by , 11 years ago
comment:2 by , 11 years ago
| Resolution: | → duplicate |
|---|---|
| Status: | new → closed |
Sorry, but opening duplicate tickets will only increase the load of the developers. The source code is open source available so feel free to submit a patch.
upon further investigation, Debug Register 5&6 are not handled correctly. Mostly they are zero, when they shouldnt be.