Simulator and simulating method for running guest program in host

A simulating method of running a guest program in a host, the method comprising:

• setting content of a hypervisor page table in the host, the hypervisor page table mapping a guest physical address space to a host physical address space;
• performing a binary translation, wherein a program logical address is employed in code translation to perform a memory access;
• updating a guest translation look-aside buffer by treating a miss in a host translation look-aside buffer, the miss being caused by execution of translated code as a miss in the guest translation look-aside buffer, the host translation look-aside buffer being configured to buffer entries for mapping addresses in a program logical address space to addresses in the guest physical address space;
• and
• updating the host translation look-aside buffer, in response to updating the guest translation look-aside buffer.

A simulator for executing a guest program in a host, the simulator comprising:

• an initialization device configured to set content of a hypervisor page table in the host;
• a binary translation device configured to perform a memory access in code translation;
• a miss handling device configured to update a guest translation look-aside buffer by treating a miss event in a host translation look-aside buffer as a miss event in the guest translation look-aside buffer;
• and
• an update tracing device configured to update the host translation look-aside buffer in response to updating the guest translation look-aside buffer.