[tip:perf/core] perf trace beauty fcntl: Augment the return of F_DUPFD(_CLOEXEC)

[tip:perf/core] perf trace beauty fcntl: Augment the return of F_DUPFD(_CLOEXEC)

[tip-bot for Arnaldo Carvalho de Melo]

Commit-ID:  07a0572439450e2631f90d595965c379de105bab
Gitweb:     http://git.kernel.org/tip/07a0572439450e2631f90d595965c379de105bab
Author:     Arnaldo Carvalho de Melo <acme@redhat.com>
AuthorDate: Fri, 14 Jul 2017 15:24:19 -0300
Committer:  Arnaldo Carvalho de Melo <acme@redhat.com>
CommitDate: Tue, 18 Jul 2017 23:14:03 -0300

perf trace beauty fcntl: Augment the return of F_DUPFD(_CLOEXEC)

Using the existing 'fd' beautifier, now we can see the path for the just
dup'ed fd:

 18031.338 ( 0.009 ms): gnome-terminal/2472 fcntl(fd: 55, cmd: DUPFD_CLOEXEC) = 56</memfd:gdk-wayland (deleted)>

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-z0ggo126p2eobfwnjw9z16tw@git.kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
---
 tools/perf/trace/beauty/fcntl.c | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/tools/perf/trace/beauty/fcntl.c b/tools/perf/trace/beauty/fcntl.c
index 9de80a7..254ae435 100644
--- a/tools/perf/trace/beauty/fcntl.c
+++ b/tools/perf/trace/beauty/fcntl.c
@@ -30,6 +30,10 @@ size_t syscall_arg__scnprintf_fcntl_cmd(char *bf, size_t size, struct syscall_ar
 		syscall_arg__set_ret_scnprintf(arg, syscall_arg__scnprintf_fcntl_getfd);
 		goto mask_arg;
 	}
+	if (arg->val == F_DUPFD_CLOEXEC || arg->val == F_DUPFD) {
+		syscall_arg__set_ret_scnprintf(arg, syscall_arg__scnprintf_fd);
+		goto out;
+	}
 	/*
 	 * Some commands ignore the third fcntl argument, "arg", so mask it
 	 */
@@ -38,7 +42,7 @@ size_t syscall_arg__scnprintf_fcntl_cmd(char *bf, size_t size, struct syscall_ar
 mask_arg:
 		arg->mask |= (1 << 2);
 	}
-
+out:
 	return syscall_arg__scnprintf_strarrays(bf, size, arg);
 }