ssrg-vt / transproc

Transform the CRIU image between different architectures for vanilla code.

TransProc

Transform CRIU images between different architectures for native binaries.

Refer to our wiki for a tutorial on how to migrate binaries with TransProc.

TransProc supports live migration of natively compiled Linux applications across servers with CPUs of different architectures. TransProc not only supports live-migration on VMs but also on bare-metal.

TransProc builds on top of CRIU to dump a running process and then transforms the CRIU images to support restoration on servers of a different architecture. Currently TransProc supports migration on x86-64 and aarch64 CPUs. TransProc uses LLVM's stack maps to generate stack and register metadata and implements a stack and register transformation logic leveraging the generated metadata. It does this on CRIU dumped images and hence does not involve injecting transformation runtime within the binary image improving security.

This repository provides the CRIU wrapper and the compiler toolchain can be found on this branch of the popcorn compiler repository.

transproc's Issues

Understanding the stackmap and the popcorn transformation library.

Fix the current issue of rewriting process failure.

• What are the missing parts of process rewriting?
• Support the simple demo application (including successfully printing on TTY).

Stack Transformation Bug

• Stack and register transformation failed for SNU-NPB BT benchmark.
• All register and stack values not transformed.

Extend crit to unwind the stack of a saved process

This is a warm-up task: try to extend the crit to print the call stacks. Like:

❯ ./criu-3.15/crit/crit x dir stack
0x400958: (foo+0xe)
0x400968: (bar+0xe)
0x400983: (main+0x19)
0x7f6046b99ec5: (__libc_start_main+0xf5)
0x400779: (_start+0x29)

Please refer to the basic crit functionalities:

❯ ./criu-3.15/crit/crit x -h
usage: crit x [-h] dir {ps,fds,mems,rss}