perf tests shell: Add check for perf data file in record+probe_libc_inet_pton test

The "probe libc's inet_pton & backtrace it with ping" test installs a
uprobe and uses perf record/script to check the backtrace. Currently
even if the "perf record" fails, the test reports success. Logs below:

  # ./perf test -v "probe libc's inet_pton & backtrace it with ping"
  81: probe libc's inet_pton & backtrace it with ping                 :
  --- start ---
  test child forked, pid 304211
  failed to open /tmp/perf.data.Btf: No such file or directory
  test child finished with 0
  ---- end ----
  probe libc's inet_pton & backtrace it with ping: Ok

Fix this by adding check for presence of perf.data file
before proceeding with "perf script".

With the patch changes, test reports fail correctly.

 # ./perf test -v "probe libc's inet_pton & backtrace it with ping"
 81: probe libc's inet_pton & backtrace it with ping                 :
  --- start ---
  test child forked, pid 304358
  FAIL: perf record failed to create "/tmp/perf.data.Uoi"
  test child finished with -1
  ---- end ----
  probe libc's inet_pton & backtrace it with ping: FAILED!

Signed-off-by: Athira Rajeev <[email protected]>
Cc: Andi Kleen <[email protected]>
Cc: Disha Goel <[email protected]>
Cc: Ian Rogers <[email protected]>
Cc: James Clark <[email protected]>
Cc: Jiri Olsa <[email protected]>
Cc: Kajol Jain <[email protected]>
Cc: Madhavan Srinivasan <[email protected]>
Cc: Michael Ellerman <[email protected]>
Cc: Nageswara R Sastry <[email protected]>
Cc: Namhyung Kim <[email protected]>
Cc: [email protected]
Link: http://lore.kernel.org/r/[email protected]
Signed-off-by: Arnaldo Carvalho de Melo <[email protected]>

0 files changed, 0 insertions, 0 deletions