2
0
mirror of git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git synced 2025-09-04 20:19:47 +08:00
linux/tools/perf/tests/shell/trace+probe_vfs_getname.sh
Jakub Brnak 92b664dcef perf test probe_vfs_getname: Skip if no suitable line detected
In some cases when calling function add_probe_vfs_getname, line number
can't be detected by 'perf probe -L getname_flags':

  78         atomic_set(&result->refcnt, 1);

	     // one of the following lines should have line number
	     // but sometimes it does not because of optimization
	     result->uptr = filename;
             result->aname = NULL;

  81         audit_getname(result);

To prevent false failures, skip the affected tests if no suitable line
numbers can be detected.

Signed-off-by: Jakub Brnak <jbrnak@redhat.com>
Acked-by: Namhyung Kim <namhyung@kernel.org>
Tested-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Ian Rogers <irogers@google.com>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Kan Liang <kan.liang@linux.intel.com>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Masami Hiramatsu <mhiramat@kernel.org>
Cc: Michael Petlan <mpetlan@redhat.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Tomas Glozar <tglozar@redhat.com>
Link: https://lore.kernel.org/r/20250324144523.597557-1-jbrnak@redhat.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2025-04-29 12:28:12 -03:00

51 lines
1.5 KiB
Bash
Executable File

#!/bin/sh
# Check open filename arg using perf trace + vfs_getname (exclusive)
# Uses the 'perf test shell' library to add probe:vfs_getname to the system
# then use it with 'perf trace' using 'touch' to write to a temp file, then
# checks that that was captured by the vfs_getname was used by 'perf trace',
# that already handles "probe:vfs_getname" if present, and used in the
# "open" syscall "filename" argument beautifier.
# SPDX-License-Identifier: GPL-2.0
# Arnaldo Carvalho de Melo <acme@kernel.org>, 2017
# shellcheck source=lib/probe.sh
. "$(dirname $0)"/lib/probe.sh
skip_if_no_perf_probe || exit 2
skip_if_no_perf_trace || exit 2
[ "$(id -u)" = 0 ] || exit 2
. "$(dirname $0)"/lib/probe_vfs_getname.sh
trace_open_vfs_getname() {
evts="$(echo "$(perf list tracepoint 2>/dev/null | grep -E 'syscalls:sys_enter_open(at)? ' | sed -r 's/.*sys_enter_([a-z]+) +\[.*$/\1/')" | sed ':a;N;s:\n:,:g')"
perf trace -e $evts touch $file 2>&1 | \
grep -E " +[0-9]+\.[0-9]+ +\( +[0-9]+\.[0-9]+ ms\): +touch/[0-9]+ open(at)?\((dfd: +CWD, +)?filename: +\"?${file}\"?, +flags: CREAT\|NOCTTY\|NONBLOCK\|WRONLY, +mode: +IRUGO\|IWUGO\) += +[0-9]+$"
}
add_probe_vfs_getname
err=$?
if [ $err -eq 1 ] ; then
skip_if_no_debuginfo
err=$?
fi
if [ $err -ne 0 ] ; then
exit $err
fi
file=$(mktemp /tmp/temporary_file.XXXXX)
# Do not use whatever ~/.perfconfig file, it may change the output
# via trace.{show_timestamp,show_prefix,etc}
export PERF_CONFIG=/dev/null
trace_open_vfs_getname
err=$?
rm -f ${file}
cleanup_probe_vfs_getname
exit $err