Messages in this thread | | | Date | Tue, 31 Jul 2012 12:08:22 +0200 | Subject | Re: [Announce] Checkpoint-restore tool v0.1 | From | richard -rw- weinberger <> |
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On Tue, Jul 31, 2012 at 11:54 AM, Pavel Emelyanov <xemul@parallels.com> wrote: >> Yeah, but I fear it's not that easy. >> We'd have to change crtools to work without ptrace(). > > Well, this is hard. Using ptrace saved us from having many special-purpose > APIs for dumping various stuff (there will be an article about it). Thus I > don't know which way is simpler -- stop using ptrace or teach ptrece to allow > several tracers to attach to one task %)
Allowing multiple tracers in a safe way is IMHO even more harder.
BTW: While reading prctl_set_mm() I noticed two things. 1. Why isn't the return value of find_vma() verified? It looks like one can set an addr which does not belong to any vma. 2. What will happen if addr is not page aligned?
-- Thanks, //richard
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