[CRIU] criu dump will block at arm64?

[long.wanglong]

add Cc:
cov at codeaurora.org <mailto:cov at codeaurora.org> and vijay.kilari at gmail.com

On 2016/4/20 20:07, long.wanglong wrote:
> Hi, all
>
> I built criu on arm64, the version is :
>
> ubuntu at ubuntu:~/criu$ git describe
> v2.1-115-g55fa530
>
> and test criu with the following steps:
>
> root at ubuntu:/home/ubuntu/criu-test# setsid ./test.sh  < /dev/null &> test.log &
> [1] 15916
> root at ubuntu:/home/ubuntu/criu-test# ps -C test.sh
>   PID TTY          TIME CMD
> 15917 ?        00:00:00 test.sh
> [1]+  Done                    setsid ./test.sh < /dev/null &> test.log
> root at ubuntu:/home/ubuntu/criu-test# criu dump -t 15917 -vvv -o dump.log && echo OK
>
> **it will be blocked at here**
>
>
> the tail of dump.log is :
>
> (00.007494) 0x7f860b3000-0x7f860b4000 (4K) prot 0x5 flags 0x22 st 0x209 off 0 reg vdso ap  shmid: 0
> (00.007499) 0x7f860b4000-0x7f860b5000 (4K) prot 0x5 flags 0x2 st 0x41 off 0x1c000 reg fp  shmid: 0
> (00.007504) 0x7f860b5000-0x7f860b7000 (8K) prot 0x7 flags 0x2 st 0x41 off 0x1d000 reg fp  shmid: 0
> (00.007508) 0x7fe20f4000-0x7fe2116000 (136K) prot 0x7 flags 0x122 st 0x201 off 0 reg ap  shmid: 0
> (00.007513) ----------------------------------------
> (00.007521)
> (00.007524) Collecting fds (pid: 15917)
> (00.007528) ----------------------------------------
> (00.007557) Found 4 file descriptors
> (00.007563) ----------------------------------------
> (00.007715) Set up parasite blob using memfd
> (00.007723) Putting parasite blob into 0x7f9254f000->0x7f85f34000
> (00.007745) Dumping GP/FPU registers for 15917
> (00.007757) Putting tsock into pid 15917
>
> The tail  output of `strace criu dump -t 15917 -vvv -o dump.log && echo OK`
>
> write(1023, "(00.027384) Set up parasite blob"..., 45) = 45
> write(1023, "(00.027428) Putting parasite blo"..., 66) = 66
> write(1023, "(00.027496) Dumping GP/FPU regis"..., 47) = 47
> ptrace(PTRACE_GETREGSET, 15917, NT_PRSTATUS, [{0x7fda97e680, 272}]) = 0
> ptrace(PTRACE_GETREGSET, 15917, NT_FPREGSET, [{0x7fda97e420, 528}]) = 0
> write(1023, "(00.027620) Putting tsock into p"..., 41) = 41
> bind(6, {sa_family=AF_LOCAL, sun_path=@"/crtools-pr-16912"}, 20) = 0
> listen(6, 1)                            = 0
> rt_sigaction(SIGCHLD, {0x46041c, [CHLD], SA_RESTART|SA_SIGINFO}, NULL, 8) = 0
> ptrace(0x420b /* PTRACE_??? */, 15917, 0x8, 0x7fda97e4a0) = 0
> ptrace(PTRACE_SETREGSET, 15917, NT_PRSTATUS, [{0x7fda97e528, 272}]) = 0
> ptrace(PTRACE_CONT, 15917, 0, SIG_0)    = 0
> accept(6,
>
>
> It blocked at accept system call.
>
> I would like to ask for ideas, how this problem can be solved.
>
> Best Regards
> Wang Long
>
>
> .
>

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