From: Arnaldo Carvalho de Melo Date: Thu, 3 Aug 2017 19:54:53 +0000 (-0300) Subject: perf test shell: Add 'probe_vfs_getname' shell test X-Git-Tag: microblaze-4.14-rc3~176^2~19^2~9 X-Git-Url: http://git.monstr.eu/?a=commitdiff_plain;h=a3534842ddd04675abc67e80432aacc01670cca8;p=linux-2.6-microblaze.git perf test shell: Add 'probe_vfs_getname' shell test First perf shell test: # perf test vfs_getname 60: Add vfs_getname probe to get syscall args filenames: Ok # In verbose mode: # perf test -v vfs_getname 60: Add vfs_getname probe to get syscall args filenames: --- start --- test child forked, pid 19146 Added new event: probe:vfs_getname (on getname_flags:72 with pathname=result->name:string) You can now use it in all perf tools, such as: perf record -e probe:vfs_getname -aR sleep 1 test child finished with 0 ---- end ---- Add vfs_getname probe to get syscall args filenames: Ok # And if the vmlinux file is not found: # mv ../build/v4.12.0-rc6+/vmlinux ../build/v4.12.0-rc6+/vmlinux.hidden # perf test vfs_getname 60: Add vfs_getname probe to get syscall args filenames: Skip # Cc: Adrian Hunter Cc: David Ahern Cc: Jiri Olsa Cc: Michael Petlan Cc: Namhyung Kim Cc: Thomas Richter Cc: Wang Nan Link: http://lkml.kernel.org/n/tip-8f3n22c1yn516ev30s603ow2@git.kernel.org Signed-off-by: Arnaldo Carvalho de Melo --- diff --git a/tools/perf/tests/shell/probe_vfs_getname.sh b/tools/perf/tests/shell/probe_vfs_getname.sh new file mode 100755 index 000000000000..d5f5248de927 --- /dev/null +++ b/tools/perf/tests/shell/probe_vfs_getname.sh @@ -0,0 +1,30 @@ +# Add vfs_getname probe to get syscall args filenames +# +# Arnaldo Carvalho de Melo , 2017 + +perf probe -l | grep -q probe:vfs_getname +had_vfs_getname=$? + +cleanup_probe_vfs_getname() { + if [ $had_vfs_getname -eq 1 ] ; then + perf probe -q -d probe:vfs_getname + fi +} + +add_probe_vfs_getname() { + local verbose=$1 + if [ $had_vfs_getname -eq 1 ] ; then + line=$(perf probe -L getname_flags | egrep 'result.*=.*filename;' | sed -r 's/[[:space:]]+([[:digit:]]+)[[:space:]]+result->uptr.*/\1/') + perf probe $verbose "vfs_getname=getname_flags:${line} pathname=result->name:string" + fi +} + +skip_if_no_debuginfo() { + add_probe_vfs_getname -v 2>&1 | grep -q "^Failed to find the path for kernel" && return 2 + return 1 +} + +add_probe_vfs_getname || skip_if_no_debuginfo +err=$? +cleanup_probe_vfs_getname +exit $err