tjh.dev / kernel
Linux kernel mirror (for testing) git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
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perf test shell: Check if 'perf probe' is available, skip tests if not

Add a library function that checks if 'perf probe' is built into the
tool being tested, skipping tests that need it.

Testing it on a system after removing the library needed to build
'probe' as a perf subcommand:

# perf test ping vfs_getname
59: Use vfs_getname probe to get syscall args filenames : Skip
60: probe libc's inet_pton & backtrace it with ping : Skip
61: Check open filename arg using perf trace + vfs_getname: Skip
62: Add vfs_getname probe to get syscall args filenames : Skip
# perf probe
perf: 'probe' is not a perf-command. See 'perf --help'.
#

Now reinstalling elfutils-libelf-devel on this Fedora 26 system to
rebuild perf and then retest this:

# perf test ping vfs_getname
60: Use vfs_getname probe to get syscall args filenames : Ok
61: probe libc's inet_pton & backtrace it with ping : Ok
62: Check open filename arg using perf trace + vfs_getname: Ok
63: Add vfs_getname probe to get syscall args filenames : Ok
#

Reported-by: Kim Phillips <kim.phillips@arm.com>
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-ctdck2gzsskqhjzu3ebb62zm@git.kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

Arnaldo Carvalho de Melo 1ad5a182 06786963

+22 -1
+6
tools/perf/tests/shell/lib/probe.sh
··· 1 + # Arnaldo Carvalho de Melo <acme@kernel.org>, 2017 2 + 3 + skip_if_no_perf_probe() { 4 + perf probe |& grep -q 'is not a perf-command' && return 2 5 + return 0 6 + }
+1 -1
tools/perf/tests/shell/lib/probe_vfs_getname.sh
··· 1 1 # Arnaldo Carvalho de Melo <acme@kernel.org>, 2017 2 2 3 - perf probe -l | grep -q probe:vfs_getname 3 + perf probe -l |& grep -q probe:vfs_getname 4 4 had_vfs_getname=$? 5 5 6 6 cleanup_probe_vfs_getname() {
+4
tools/perf/tests/shell/probe_vfs_getname.sh
··· 2 2 # 3 3 # Arnaldo Carvalho de Melo <acme@kernel.org>, 2017 4 4 5 + . $(dirname $0)/lib/probe.sh 6 + 7 + skip_if_no_perf_probe || exit 2 8 + 5 9 . $(dirname $0)/lib/probe_vfs_getname.sh 6 10 7 11 add_probe_vfs_getname || skip_if_no_debuginfo
+4
tools/perf/tests/shell/record+script_probe_vfs_getname.sh
··· 7 7 8 8 # Arnaldo Carvalho de Melo <acme@kernel.org>, 2017 9 9 10 + . $(dirname $0)/lib/probe.sh 11 + 12 + skip_if_no_perf_probe || exit 2 13 + 10 14 . $(dirname $0)/lib/probe_vfs_getname.sh 11 15 12 16 perfdata=$(mktemp /tmp/__perf_test.perf.data.XXXXX)
+3
tools/perf/tests/shell/trace+probe_libc_inet_pton.sh
··· 8 8 9 9 # Arnaldo Carvalho de Melo <acme@kernel.org>, 2017 10 10 11 + . $(dirname $0)/lib/probe.sh 12 + 11 13 trace_libc_inet_pton_backtrace() { 12 14 idx=0 13 15 expected[0]="PING.*bytes" ··· 34 32 done 35 33 } 36 34 35 + skip_if_no_perf_probe && \ 37 36 perf probe -q /lib64/libc-*.so inet_pton && \ 38 37 trace_libc_inet_pton_backtrace 39 38 err=$?
+4
tools/perf/tests/shell/trace+probe_vfs_getname.sh
··· 8 8 9 9 # Arnaldo Carvalho de Melo <acme@kernel.org>, 2017 10 10 11 + . $(dirname $0)/lib/probe.sh 12 + 13 + skip_if_no_perf_probe || exit 2 14 + 11 15 . $(dirname $0)/lib/probe_vfs_getname.sh 12 16 13 17 file=$(mktemp /tmp/temporary_file.XXXXX)