METHOD AND APPARATUS FOR RECOGNIZING PROCESSES IN GOS BY VMM

• US 20090007109A1
• Filed: 06/26/2008
• Published: 01/01/2009
• Est. Priority Date: 06/29/2007
• Status: Active Grant

• Current Assignee: Lenovo (Beijing) Limited (Lenovo Group Ltd.)
• Original Assignee: Lenovo (Beijing) Limited (Lenovo Group Ltd.)
• Inventors: KANG, HUA
• Granted Patent: US 8,392,914 B2
• Time in Patent Office: Days
• US Class Current: 718/1
• CPC Class Codes: G06F 11/3409 for performance assessment
• CPC Class Codes: G06F 11/3466 Performance evaluation by tracing or monitoring
• CPC Class Codes: G06F 2201/815 Virtual
• CPC Class Codes: G06F 2201/865 Monitoring of software

Abstract

The present invention provides a method apparatus for recognizing a process in a guest operation system by a virtual machine monitor, and the method comprises: step 101 of recording by the virtual machine monitor the page table information of a process to be executed upon process switching of the guest operating system; step 102 of acquiring by the virtual machine monitor the identification information of the currently-executed process; step 103 of storing by the virtual machine monitor the correspondence between the previously recorded page table information of the process to be executed and the identification information of the currently-executed process. By storing the correspondence between the process page directory base address and the identification information of the process, the method and apparatus of the present invention enable the virtual machine monitor to locate and monitor processes executed in the GOS, thus promoting the management granularity on GOS of the virtual machine monitor to a process level.

Claims

1. A method for recognizing a process in a guest operation system by a virtual machine monitor, comprising:

step 101 of recording by the virtual machine monitor the page table information of a process to be executed upon process switching of the guest operation system;

step 102 of acquiring by the virtual machine monitor the identification information of the currently-executed process;

step 103 of storing by the virtual machine monitor the corresponding relation between the previously recorded page table information of the process to be executed and the identification information of the currently-executed process.

2. The method as claimed in claim 1, wherein said page table information is page directory base address.

3. The method as claimed in claim 2, wherein said step 101 further comprises:

step 1011 of performing process switching and accessing CR3 register by the guest operation system;

step 1012 of capturing by the virtual machine monitor the operation of accessing CR3 register by the guest operation system;

step 1013 of acquiring by the virtual machine monitor the page directory physical base address of the process to be executed.

4. The method as claimed in claim 1, wherein said identification information of the currently-executed process is:

a process-readable identification in the process descriptor of the currently-executed process;

or

a unique identification allocated to the currently-executed process by the virtual machine monitor.

5. The method as claimed in claim 4, wherein when the said identification information of the currently-executed process is a process-readable identification of the currently-executed process, said process descriptor is acquired by the virtual machine monitor from underlying hardware or from the guest operation system via a specific interface.

6. The method as claimed in claim 2, wherein said step 101 further comprises a determination step of determining whether the acquired page directory base address has been saved, and entering said step 102 if the answer is NO.

7. The method as claimed in claim 2, wherein in said step 103 the corresponding relation between the previously recorded page directory base address of the process to be executed and the identification information of the currently-executed process is stored in a pair of key values.

8. An apparatus for recognizing a process in a guest operation system by a virtual machine monitor, comprising:

a page directory base address recording module for recording the page table information of a process to be executed upon process switching of guest operation system;

a process identification information acquisition module for acquiring the identification information of the currently-executed process;

a storage module for storing the corresponding relation between the previously recorded page table information of the process to be executed and the identification information of the currently-executed process.

9. The apparatus as claimed in claim 8, wherein said page table information is page directory base address.

10. The apparatus as claimed in claim 8, wherein said identification information of the currently-executed process is:

a process-readable identification in the process descriptor of the currently-executed process;

or

a unique identification allocated to the currently-executed process by the process identification information acquisition module.