System freezes when int 3 is executed in usermode application

[b1tg]

System freezes when int 3 is executed in usermode application.

Description

I test HyperPlatform.sys in a Win7 x64 vm.

With windbg attached to vm, bp.exe will cause breakpoint in windbg.

Without windbg attached to vm, if i run bp.exe in vm , vm will freeze, i tried to uncomment the InterruptionVector::kBreakpointException line, but still the same issue.

HyperPlatform/HyperPlatform/vm.cpp

Lines 658 to 662 in bf6a2b8

	const auto exception_bitmap =
	// 1 << InterruptionVector::kBreakpointException |
	// 1 << InterruptionVector::kGeneralProtectionException |
	// 1 << InterruptionVector::kPageFaultException |
	0;

bp.exe source code:

// bp.exe source code
#include <stdio.h>
#include <Windows.h>


static LONG CALLBACK VectoredHandler(
	_In_ PEXCEPTION_POINTERS ExceptionInfo
)
{
	printf("hello from exception handler \n");
	if (ExceptionInfo->ExceptionRecord->ExceptionCode == EXCEPTION_BREAKPOINT)
	{
		printf("got EXCEPTION_BREAKPOINT\n");
		//Increase EIP/RIP to continue execution.
#ifdef _WIN64
		ExceptionInfo->ContextRecord->Rip++;
#else
		ExceptionInfo->ContextRecord->Eip++;
#endif
		return EXCEPTION_CONTINUE_EXECUTION;
	}
	return EXCEPTION_CONTINUE_SEARCH;
}

int main()
{
	printf("start..\n");
	PVOID Handle = AddVectoredExceptionHandler(1, VectoredHandler);
	__debugbreak();
	RemoveVectoredExceptionHandler(Handle);
	printf("over..\n");
	return 0;
}

Expected behavior

Without windbg attached to vm, if i run bp.exe in vm , vm should not freeze and VectoredHandler should be called.

Actual behavior

Without windbg attached to vm, if i run bp.exe in vm , vm will freeze.

Steps to reproduce the problem

• Load driver HyperPlatform in Win7 x64 virtual machine
• run bp.exe in cmd.exe

Specifications

• Commit: bf6a2b8

• OS version: Host(Win10 x64 2004) (VM: Win7 x64 in Vmware Workstation)

• Hardware: intel