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perf test trace_btf_enum: Add regression test for the BTF augmentation of enums in 'perf trace'

Trace landlock_add_rule syscall to see if the output is desirable.

Trace the non-syscall tracepoint 'timer:hrtimer_init' and
'timer:hrtimer_start', see if the 'mode' argument is augmented,
the 'mode' enum argument has the prefix of 'HRTIMER_MODE_'
in its name.

Committer testing:

root@x1:~# perf test enum
124: perf trace enum augmentation tests : Ok
root@x1:~# perf test -v enum
124: perf trace enum augmentation tests : Ok
root@x1:~# perf trace -e landlock_add_rule perf test -v enum
0.000 ( 0.010 ms): perf/749827 landlock_add_rule(ruleset_fd: 11, rule_type: LANDLOCK_RULE_PATH_BENEATH, rule_attr: 0x7ffd324171d4, flags: 45) = -1 EINVAL (Invalid argument)
0.012 ( 0.002 ms): perf/749827 landlock_add_rule(ruleset_fd: 11, rule_type: LANDLOCK_RULE_NET_PORT, rule_attr: 0x7ffd324171e0, flags: 45) = -1 EINVAL (Invalid argument)
457.821 ( 0.007 ms): perf/749830 landlock_add_rule(ruleset_fd: 11, rule_type: LANDLOCK_RULE_PATH_BENEATH, rule_attr: 0x7ffd4acd31e4, flags: 45) = -1 EINVAL (Invalid argument)
457.832 ( 0.003 ms): perf/749830 landlock_add_rule(ruleset_fd: 11, rule_type: LANDLOCK_RULE_NET_PORT, rule_attr: 0x7ffd4acd31f0, flags: 45) = -1 EINVAL (Invalid argument)
124: perf trace enum augmentation tests : Ok
root@x1:~#

Suggested-by: Arnaldo Carvalho de Melo <acme@kernel.org>
Signed-off-by: Howard Chu <howardchu95@gmail.com>
Tested-by: Arnaldo Carvalho de Melo <acme@kernel.org>
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Ian Rogers <irogers@google.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Kan Liang <kan.liang@linux.intel.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Link: https://lore.kernel.org/lkml/20240619082042.4173621-6-howardchu95@gmail.com
Link: https://lore.kernel.org/r/20240624181345.124764-7-howardchu95@gmail.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

authored by

Howard Chu and committed by
Arnaldo Carvalho de Melo d66763fe 3656e566

+61
+61
tools/perf/tests/shell/trace_btf_enum.sh
··· 1 + #!/bin/sh 2 + # perf trace enum augmentation tests 3 + # SPDX-License-Identifier: GPL-2.0 4 + 5 + err=0 6 + set -e 7 + 8 + syscall="landlock_add_rule" 9 + non_syscall="timer:hrtimer_init,timer:hrtimer_start" 10 + 11 + TESTPROG="perf test -w landlock" 12 + 13 + . "$(dirname $0)"/lib/probe.sh 14 + skip_if_no_perf_trace || exit 2 15 + 16 + check_vmlinux() { 17 + echo "Checking if vmlinux exists" 18 + if ! ls /sys/kernel/btf/vmlinux 1>/dev/null 2>&1 19 + then 20 + echo "trace+enum test [Skipped missing vmlinux BTF support]" 21 + err=2 22 + fi 23 + } 24 + 25 + trace_landlock() { 26 + echo "Tracing syscall ${syscall}" 27 + 28 + # test flight just to see if landlock_add_rule and libbpf are available 29 + $TESTPROG 30 + 31 + if perf trace -e $syscall $TESTPROG 2>&1 | \ 32 + grep -q -E ".*landlock_add_rule\(ruleset_fd: 11, rule_type: (LANDLOCK_RULE_PATH_BENEATH|LANDLOCK_RULE_NET_PORT), rule_attr: 0x[a-f0-9]+, flags: 45\) = -1.*" 33 + then 34 + err=0 35 + else 36 + err=1 37 + fi 38 + } 39 + 40 + trace_non_syscall() { 41 + echo "Tracing non-syscall tracepoint ${non-syscall}" 42 + if perf trace -e $non_syscall --max-events=1 2>&1 | \ 43 + grep -q -E '.*timer:hrtimer_.*\(.*mode: HRTIMER_MODE_.*\)$' 44 + then 45 + err=0 46 + else 47 + err=1 48 + fi 49 + } 50 + 51 + check_vmlinux 52 + 53 + if [ $err = 0 ]; then 54 + trace_landlock 55 + fi 56 + 57 + if [ $err = 0 ]; then 58 + trace_non_syscall 59 + fi 60 + 61 + exit $err