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

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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>
This commit is contained in:
Howard Chu 2024-06-25 02:13:43 +08:00 • committed by Arnaldo Carvalho de Melo
parent 3656e566cf
commit d66763fed3
1 changed files with 61 additions and 0 deletions
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61
tools/perf/tests/shell/trace_btf_enum.sh Executable file
View file

@ -0,0 +1,61 @@
#!/bin/sh
# perf trace enum augmentation tests
# SPDX-License-Identifier: GPL-2.0
err=0
set -e
syscall="landlock_add_rule"
non_syscall="timer:hrtimer_init,timer:hrtimer_start"
TESTPROG="perf test -w landlock"
. "$(dirname $0)"/lib/probe.sh
skip_if_no_perf_trace || exit 2
check_vmlinux() {
echo "Checking if vmlinux exists"
if ! ls /sys/kernel/btf/vmlinux 1>/dev/null 2>&1
then
echo "trace+enum test [Skipped missing vmlinux BTF support]"
err=2
fi
}
trace_landlock() {
echo "Tracing syscall ${syscall}"
# test flight just to see if landlock_add_rule and libbpf are available
$TESTPROG
if perf trace -e $syscall $TESTPROG 2>&1 | \
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.*"
then
err=0
else
err=1
fi
}
trace_non_syscall() {
echo "Tracing non-syscall tracepoint ${non-syscall}"
if perf trace -e $non_syscall --max-events=1 2>&1 | \
grep -q -E '.*timer:hrtimer_.*\(.*mode: HRTIMER_MODE_.*\)$'
then
err=0
else
err=1
fi
}
check_vmlinux
if [ $err = 0 ]; then
trace_landlock
fi
if [ $err = 0 ]; then
trace_non_syscall
fi
exit $err