tree 3bc8c0f45e5d6f0ca143a358c326fe0215ff4bd9
parent 4eaf97e8c5b13d01dd3c3b00181b6eed208aec01
author Michael Petlan <mpetlan@redhat.com> 1544457604 -0500
committer Arnaldo Carvalho de Melo <acme@redhat.com> 1545146504 -0300

perf stat: Avoid segfaults caused by negated options

Some 'perf stat' options do not make sense to be negated (event,
cgroup), some do not have negated path implemented (metrics). Due to
that, it is better to disable the "no-" prefix for them, since
otherwise, the later opt-parsing segfaults.

Before:

  $ perf stat --no-metrics -- ls
  Segmentation fault (core dumped)

After:

  $ perf stat --no-metrics -- ls
   Error: option `no-metrics' isn't available
   Usage: perf stat [<options>] [<command>]

Signed-off-by: Michael Petlan <mpetlan@redhat.com>
Tested-by: Arnaldo Carvalho de Melo <acme@redhat.com>
LPU-Reference: 1485912065.62416880.1544457604340.JavaMail.zimbra@redhat.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>