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'''Compel''' is a utility to execute arbitrary code in a context of a foreign process. Compel is part of CRIU, and its sources are available from [https://github.com/
xemul/criu/tree/criu-dev/compel the criu-dev branch of CRIU repo, subdirectory compel].
The code to be executed is called '''parasite code'''. Once compiled with compel flags and packed, it can be executed in other task's context. Note the code is run in environment without glibc, thus it can not call the usual stdio/stdlib/etc. functions.