Changes

== Parasite code injection ==

== Parasite code injection ==

This thing was split into a separate project called [https://github.com/xemul/compel compel].

This thing was split into a sub-project called [[compel]].

Compel is an utility to execute code in foreign process address space. It is based on the same technology we use in CRIU to obtain some process-private data on dump.

Compel is an utility to execute code in foreign process address space. It is based on the same technology we use in CRIU to obtain some process-private data on dump.

We don't currently maintain compel and it's quite out-dated, but still functional.

We don't currently maintain compel and it's quite out-dated, but still functional.

== Managing protocol buffers objects ==

== Managing protocol buffers objects ==

See more examples in our protobuf/*.proto files.

See more examples in our protobuf/*.proto files.

It is also worth noting, that we have a unique number for all kinds of custom protobuf options(see [[Images#Notes_about_protobuf]]), so you don't have to worry that it might collide with others.

It is also worth noting, that we have a unique number for all kinds of custom protobuf options, so you don't have to worry that it might collide with others.

 

== Sharing of kernel objects ==

== Sharing of kernel objects ==

In kernel there's no API that can just reveal the tasks-to-objects map. Instead, there's an API called <code>kcmp()</code> that compares two e.g. file descriptors and reports back whether the file referenced by them is the same or not. In CRIU we have a [https://github.com/xemul/criu/blob/master/kcmp-ids.c KCMPIDS] engine that uses this API, build [[kcmp trees]] and turns the equals-notequals answers into a list of IDs of objects.

In kernel there's no API that can just reveal the tasks-to-objects map. Instead, there's an API called <code>kcmp()</code> that compares two e.g. file descriptors and reports back whether the file referenced by them is the same or not. In CRIU we have a [https://github.com/xemul/criu/blob/master/kcmp-ids.c KCMPIDS] engine that uses this API, build [[kcmp trees]] and turns the equals-notequals answers into a list of IDs of objects.

[[Category:Development]]

[[Category:Development]]

[[Category:Under the hood]]

[[Category:Under the hood]]