Using "-c" and CTRL+C

[Dmitry V. Levin]

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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