[CRIU] [PATCH] compel: new catch and "release at" helpers added

[Stanislav Kinsburskiy]

17.03.2017 14:28, Pavel Emelyanov пишет:
> On 03/16/2017 02:43 PM, Stanislav Kinsburskiy wrote:
>> These helpers are compel_run_at split result.
> BTW, the compel_run_at itself seems to be unused.


I use it.


>> IOW, it's an asynchronious way
>> of calling some binary code in remote process and cathing it after it's done.
>>
>> Signed-off-by: Stanislav Kinsburskiy <skinsbursky at virtuozzo.com>
>> ---
>>   compel/include/uapi/infect.h |    2 ++
>>   compel/src/lib/infect.c      |   14 ++++++++++++++
>>   2 files changed, 16 insertions(+)
>>
>> diff --git a/compel/include/uapi/infect.h b/compel/include/uapi/infect.h
>> index da0ca3a..aebb77c 100644
>> --- a/compel/include/uapi/infect.h
>> +++ b/compel/include/uapi/infect.h
>> @@ -66,6 +66,8 @@ extern int compel_syscall(struct parasite_ctl *ctl, int nr, long *ret,
>>   		unsigned long arg6);
>>   extern int compel_run_in_thread(struct parasite_thread_ctl *tctl, unsigned int cmd);
>>   extern int compel_run_at(struct parasite_ctl *ctl, unsigned long ip, user_regs_struct_t *ret_regs);
>> +extern int compel_release_at(struct parasite_ctl *ctl, unsigned long ip);
>> +extern int compel_catch(struct parasite_ctl *ctl, user_regs_struct_t *ret_regs);
>>   
>>   /*
>>    * The PTRACE_SYSCALL will trap task twice -- on
>> diff --git a/compel/src/lib/infect.c b/compel/src/lib/infect.c
>> index c024250..a2cb5d6 100644
>> --- a/compel/src/lib/infect.c
>> +++ b/compel/src/lib/infect.c
>> @@ -581,6 +581,20 @@ int compel_run_at(struct parasite_ctl *ctl, unsigned long ip, user_regs_struct_t
>>   	return ret;
>>   }
>>   
>> +int compel_release_at(struct parasite_ctl *ctl, unsigned long ip)
>> +{
>> +	user_regs_struct_t regs = ctl->orig.regs;
>> +
>> +	return parasite_run(ctl->rpid, PTRACE_CONT, ip, 0, &regs, &ctl->orig);
>> +}
>> +
>> +int compel_catch(struct parasite_ctl *ctl, user_regs_struct_t *ret_regs)
>> +{
>> +	user_regs_struct_t regs;
>> +
>> +	return parasite_trap(ctl, ctl->rpid, ret_regs ? ret_regs : &regs, &ctl->orig);
>> +}
>> +
>>   static int accept_tsock(struct parasite_ctl *ctl)
>>   {
>>   	int sock;
>>
>> .
>>