问题
I would like to know: Is there a system call, library, kernel module or command line tool I can use to store the complete state of a running program on the disk?
That is: I would like to completely dump the memory, page layout, stack, registers, threads and file descriptors a process is currently using to a file on the hard drive and be able to restore it later seamlessly, just like an emulator "savestate" or a Virtual Machine "snapshot".
I would also like, if possible, to have multiple "backup copies" of the program state, so I can revert to a previous execution point if the program dies for some reason.
Is this possible?
回答1:
Something like this? You can also check out the checkpointing page on wikipedia.
回答2:
You should take a look at the BLCR project from Berkeley Lab. This is widely used by several MPI implementations to provide Checkpoint / Restart capabilities for parallel applications.
回答3:
A core dump is basically this, so yes, it must be possible to get.
What you really want is a way to restore that dump as a running program. That might be more difficult.
来源：https://stackoverflow.com/questions/5697720/storing-entire-process-state-on-disk-and-restoring-it-later-on-linux-unix