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perf test shell: Add 'probe_vfs_getname' shell test

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First perf shell test:

  # perf test vfs_getname
  60: Add vfs_getname probe to get syscall args filenames: Ok
  #

In verbose mode:

  # perf test -v vfs_getname
  60: Add vfs_getname probe to get syscall args filenames:
  --- start ---
  test child forked, pid 19146
  Added new event:
    probe:vfs_getname    (on getname_flags:72 with pathname=result->name:string)

  You can now use it in all perf tools, such as:

	  perf record -e probe:vfs_getname -aR sleep 1

  test child finished with 0
  ---- end ----
  Add vfs_getname probe to get syscall args filenames: Ok
  #

And if the vmlinux file is not found:

  # mv ../build/v4.12.0-rc6+/vmlinux ../build/v4.12.0-rc6+/vmlinux.hidden
  # perf test vfs_getname
  60: Add vfs_getname probe to get syscall args filenames: Skip
  #

Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: David Ahern <dsahern@gmail.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Michael Petlan <mpetlan@redhat.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Thomas Richter <tmricht@linux.vnet.ibm.com>
Cc: Wang Nan <wangnan0@huawei.com>
Link: http://lkml.kernel.org/n/tip-8f3n22c1yn516ev30s603ow2@git.kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
This commit is contained in:
Arnaldo Carvalho de Melo 2017-08-03 16:54:53 -03:00
parent 6d02acc191
commit a3534842dd
1 changed files with 30 additions and 0 deletions
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30
tools/perf/tests/shell/probe_vfs_getname.sh Executable file
View File

@ -0,0 +1,30 @@
# Add vfs_getname probe to get syscall args filenames
#
# Arnaldo Carvalho de Melo <acme@kernel.org>, 2017
perf probe -l | grep -q probe:vfs_getname
had_vfs_getname=$?
cleanup_probe_vfs_getname() {
if [ $had_vfs_getname -eq 1 ] ; then
perf probe -q -d probe:vfs_getname
fi
}
add_probe_vfs_getname() {
local verbose=$1
if [ $had_vfs_getname -eq 1 ] ; then
line=$(perf probe -L getname_flags | egrep 'result.*=.*filename;' | sed -r 's/[[:space:]]+([[:digit:]]+)[[:space:]]+result->uptr.*/\1/')
perf probe $verbose "vfs_getname=getname_flags:${line} pathname=result->name:string"
fi
}
skip_if_no_debuginfo() {
add_probe_vfs_getname -v 2>&1 | grep -q "^Failed to find the path for kernel" && return 2
return 1
}
add_probe_vfs_getname || skip_if_no_debuginfo
err=$?
cleanup_probe_vfs_getname
exit $err