mirror of
https://mirrors.bfsu.edu.cn/git/linux.git
synced 2024-12-18 00:24:58 +08:00
1ad5a18269
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>
36 lines
1021 B
Bash
Executable File
36 lines
1021 B
Bash
Executable File
# Check open filename arg using perf trace + vfs_getname
|
|
|
|
# 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.
|
|
|
|
# Arnaldo Carvalho de Melo <acme@kernel.org>, 2017
|
|
|
|
. $(dirname $0)/lib/probe.sh
|
|
|
|
skip_if_no_perf_probe || exit 2
|
|
|
|
. $(dirname $0)/lib/probe_vfs_getname.sh
|
|
|
|
file=$(mktemp /tmp/temporary_file.XXXXX)
|
|
|
|
trace_open_vfs_getname() {
|
|
perf trace -e open touch $file 2>&1 | \
|
|
egrep " +[0-9]+\.[0-9]+ +\( +[0-9]+\.[0-9]+ ms\): +touch\/[0-9]+ open\(filename: +${file}, +flags: CREAT\|NOCTTY\|NONBLOCK\|WRONLY, +mode: +IRUGO\|IWUGO\) += +[0-9]+$"
|
|
}
|
|
|
|
|
|
add_probe_vfs_getname || skip_if_no_debuginfo
|
|
err=$?
|
|
if [ $err -ne 0 ] ; then
|
|
exit $err
|
|
fi
|
|
|
|
trace_open_vfs_getname
|
|
err=$?
|
|
rm -f ${file}
|
|
cleanup_probe_vfs_getname
|
|
exit $err
|