Methods, systems and apparatus to capture error conditions in lightweight virtual machine managers

摘要

Methods and apparatus are disclosed to capture error conditions in lightweight virtual machine managers. A disclosed example method includes defining a shared memory structure between the VMM and a virtual machine (VM), when the VM is spawned by the VMM, installing an abort handler on the VM associated with a vector value, in response to detecting an error, transferring VMM state information to the shared memory structure, and invoking the abort handler on the VM to transfer contents of the shared memory structure to a non-volatile memory.

主权项

1. A method to capture error information from a virtual machine manager (VMM), comprising:
defining a shared memory structure between the VMM and a virtual machine (VM) at a first time, the VMM without file system access support at the first time; when the VM is spawned by the VMM, installing an abort handler on the VM associated with a vector value; in response to detecting an error of the VMM at a second time, transferring VMM state information to the shared memory structure to enable access to a file system for the VMM at the second time; and preserving the VMM state information in a non-volatile memory at the second time by invoking the abort handler on the VM associated with the vector value to transfer the VMM state information in the shared memory structure via the file system.