Memory access method for use in multi-operating systems and electronic device

An electronic device, comprising:

• a memory, and at least one processor;
• wherein the memory is communicably connected to the at least one processor via a communication bus;
• the at least one processor is configured to perform instructions stored in the memory;
• and the memory stores instructions for performing the steps of:
• in a guest operating system, requesting to share a memory from a host operating system when it is monitored that software needs to share the memory;
• in the host operating system, allocating a memory share sub-region to the guest operating system by a memory share management module Gralloc;
• in the host operating system, returning an index value of the memory share sub-region to the guest operating system;
• and
• in the guest operating system, returning an address of a mapping sub-region to the software upon mapping the memory share sub-region corresponding to the index value to the guest operating system by an emulation processor QEMU.

A computer program product for use in combination with an electronic device, comprising a computer program embedded into a computer-readable storage medium;

• wherein the computer program comprises instructions for causing the electronic device to perform the steps of:
• in a guest operating system, requesting to share a memory from a host operating system when it is monitored that software needs to share the memory;
• in the host operating system, allocating a memory share sub-region to the guest operating system by a memory share management module Gralloc;
• in the host operating system, returning an index value of the memory share sub-region to the guest operating system;
• and
• in the guest operating system, returning an address of a mapping sub-region to the software upon mapping the memory share sub-region corresponding to the index value to the guest operating system by an emulation processor QEMU.