[CRIU] [PATCH 07/21] parasite: allocate stack for each thread

[Pavel Emelyanov]

On 05/24/2013 04:55 PM, Cyrill Gorcunov wrote:
> On Fri, May 24, 2013 at 04:20:10PM +0400, Andrey Vagin wrote:
>> It will be used for executed parasite as a daemon.
> 
> I believe more detailed comment will make Pavel more happy. In short
> what we have previously -- the stack has been preallocated in parasite
> blob itself and bootstrap procedure calculated the value needed for %rsp.
> 
> With this patch applied we provide every thread own stack as:
> 
>  - find out how many threads are present
>  - calculate the summary size of all stacks
>  - when we ask dumpee to provide us memory area needed to run
>    parasite code, we pass summary size needed for everything
>  - when parasite code is asked to run we calculate %rsp needed
>    taking into account the thread number (ie offsets) and then
>    setup proper %rsp via ptrace call, instead of calculating it
>    in bootstrap parasite code
> 
> 	Cyrill
> .
> 


OK, thanks.
Applied