[PATCH 22/86] perf trace beauty fcntl: Beautify F_[GS]ETFD arg/return value

Arnaldo Carvalho de Melo
2017-07-19T14:32:09Z

From: Arnaldo Carvalho de Melo <acme@redhat.com>

Now it will show 0 or CLOEXEC, the only !0 value returned by the kernel
for fcntl(fd, F_GETFD).

And for F_SETFD:

6870.267 ( 0.004 ms): make/29812 fcntl(fd: 7</home/acme/git/linux/tools/build/Build.include>, cmd: SETFD, arg: CLOEXEC) = 0
6873.805 ( 0.002 ms): make/29816 fcntl(fd: 6</home/acme/git/linux/tools/build/Makefile.build>, cmd: SETFD, arg: CLOEXEC) = 0
<SNIP>
77986.150 ( 0.006 ms): alsa-sink-ALC3/2042 fcntl(fd: 45</dev/snd/pcmC1D0p>, cmd: SETFD, arg: CLOEXEC) = 0
77986.271 ( 0.006 ms): alsa-sink-ALC3/2042 fcntl(fd: 23</dev/snd/controlC1>, cmd: SETFD, arg: CLOEXEC) = 0

Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: David Ahern <dsahern@gmail.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Wang Nan <wangnan0@huawei.com>
Link: http://lkml.kernel.org/n/tip-sz9dob7t4zd6m65femazpaah@git.kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
---
tools/perf/trace/beauty/fcntl.c | 16 ++++++++++++++--
1 file changed, 14 insertions(+), 2 deletions(-)

diff --git a/tools/perf/trace/beauty/fcntl.c b/tools/perf/trace/beauty/fcntl.c
index 3456bf4cdb48..384f177a4304 100644
--- a/tools/perf/trace/beauty/fcntl.c
+++ b/tools/perf/trace/beauty/fcntl.c
@@ -7,19 +7,28 @@
*/

#include "trace/beauty/beauty.h"
+#include <linux/kernel.h>
#include <uapi/linux/fcntl.h>

+static size_t fcntl__scnprintf_getfd(unsigned long val, char *bf, size_t size)
+{
+ return scnprintf(bf, size, "%s", val ? "CLOEXEC" : "0");
+}
+
size_t syscall_arg__scnprintf_fcntl_cmd(char *bf, size_t size, struct syscall_arg *arg)
{
if (arg->val == F_GETFL) {
syscall_arg__set_ret_scnprintf(arg, open__scnprintf_flags);
goto mask_arg;
}
+ if (arg->val == F_GETFD) {
+ syscall_arg__set_ret_scnprintf(arg, fcntl__scnprintf_getfd);
+ goto mask_arg;
+ }
/*
* Some commands ignore the third fcntl argument, "arg", so mask it
*/
- if (arg->val == F_GETFD ||
- arg->val == F_GETOWN || arg->val == F_GET_SEALS ||
+ if (arg->val == F_GETOWN || arg->val == F_GET_SEALS ||
arg->val == F_GETLEASE || arg->val == F_GETSIG) {
mask_arg:
arg->mask |= (1 << 2);
@@ -32,6 +41,9 @@ size_t syscall_arg__scnprintf_fcntl_arg(char *bf, size_t size, struct syscall_ar
{
int cmd = syscall_arg__val(arg, 1);

+ if (cmd == F_SETFD)
+ return fcntl__scnprintf_getfd(arg->val, bf, size);
+
if (cmd == F_SETFL)
return open__scnprintf_flags(arg->val, bf, size);
/*
--
2.9.4