Using "-c" and CTRL+C

[enh]

running the x86-64 Android strace on my desktop worked fine too. switching
back to arm, it looks like the problem is something to do with adb rather
than strace:

$ adb shell strace -c sleep 100
^C
$ adb shell
root at mako:/ # strace -c sleep 100
^CProcess 2294 detached
% time     seconds  usecs/call     calls    errors syscall
------ ----------- ----------- --------- --------- ----------------
100.00    0.000153           5        34           mmap2
  0.00    0.000000           0         7           read
  0.00    0.000000           0         8           close
  0.00    0.000000           0         1           execve
  0.00    0.000000           0         1           brk
  0.00    0.000000           0         8           sigaction
  0.00    0.000000           0         1           gettimeofday
  0.00    0.000000           0         7           munmap
  0.00    0.000000           0        18           mprotect
  0.00    0.000000           0         1           prctl
  0.00    0.000000           0         1           sigaltstack
  0.00    0.000000           0         1           getrlimit
  0.00    0.000000           0         1           fstat64
  0.00    0.000000           0         2         2 madvise
  0.00    0.000000           0         1           fcntl64
  0.00    0.000000           0         1           futex
  0.00    0.000000           0         1           set_tid_address
  0.00    0.000000           0         1           statfs64
  0.00    0.000000           0        15         7 openat
  0.00    0.000000           0         1           set_tls
------ ----------- ----------- --------- --------- ----------------
100.00    0.000153                   111         9 total
root at mako:/ #

so whatever i was seeing doesn't look like an strace problem.

looks like adb just doesn't catch SIGINT to pass it on:

$ strace -f adb shell sleep 100
...
write(3, "shell:sleep 100", 15)         = 15
read(3, "OKAY", 4)                      = 4
read(3, ^C <unfinished ...>

On Thu, May 8, 2014 at 2:11 PM, Dmitry V. Levin <ldv at altlinux.org> wrote:

> Hi,
>
> On Wed, May 07, 2014 at 04:54:40PM +0200, Bud Millwood wrote:
> > Hi all, I'm not on this list but I'll keep an eye out for a response
> > to this message.
> >
> > In the past I noticed that if I ran "strace -c" against a process, I
> > could press CTRL-C and strace would print out the statistics it had
> > collected so far, then exit. It now seems to just exit without
> > printing any of the statistics.
>
> Strange, it works for me, both in simple and in -p mode.
> For example:
>
> $ strace -c cat & sleep 1 && kill -INT $!
> [1] 19981
> Process 19985 detached
> % time     seconds  usecs/call     calls    errors syscall
> ------ ----------- ----------- --------- --------- ----------------
> $  27.65    0.000060           8         8           mmap
>  14.29    0.000031           8         4           mprotect
>  10.14    0.000022           6         4           fstat
>   7.83    0.000017           9         2           open
>   7.83    0.000017           4         4           brk
>   6.45    0.000014           7         2         1 read
>   5.53    0.000012          12         1         1 access
>   5.07    0.000011           6         2           fadvise64
>   4.61    0.000010           5         2           close
>   4.61    0.000010          10         1           munmap
>   3.69    0.000008           8         1           execve
>   2.30    0.000005           5         1           arch_prctl
> ------ ----------- ----------- --------- --------- ----------------
> 100.00    0.000217                    32         2 total
> [1]+  Done                    strace -c cat
>
> $ sleep 2 && sleep 2 & sleep 1; strace -cp $! & sleep 2 && kill -INT $!
> [1] 19986
> [2] 19989
> Process 19986 attached
> Process 19986 detached
> % time     seconds  usecs/call     calls    errors syscall
> ------ ----------- ----------- --------- --------- ----------------
> $  80.77    0.000710         355         2         1 wait4
>  15.81    0.000139         139         1           clone
>   2.62    0.000023           4         6           rt_sigprocmask
>   0.46    0.000004           2         2           rt_sigaction
>   0.34    0.000003           3         1           rt_sigreturn
> ------ ----------- ----------- --------- --------- ----------------
> 100.00    0.000879                    12         1 total
> [2]+  Done                    strace -cp $!
> [1]-  Done                    sleep 2 && sleep 2
>
> You aren't using -I1 option, are you?
>
>
> --
> ldv
>
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