[PATCH 08/63] perf trace beauty: Beautify renameat2's fd arg wrt AT_FDCWD

Arnaldo Carvalho de Melo
2018-12-18T22:11:10Z

Just like is done with the 'renameat' syscall.

# strace -e renameat2 -f perf trace -e rename* mv c /tmp
[pid 12334] renameat2(AT_FDCWD, "c", AT_FDCWD, "/tmp", RENAME_NOREPLACE) = -1 EXDEV (Invalid cross-device link)
[pid 12334] renameat2(AT_FDCWD, "c", AT_FDCWD, "/tmp/c", RENAME_NOREPLACE) = -1 EEXIST (File exists)
1.947 ( 0.007 ms): mv/12334 renameat2(olddfd: CWD, oldname: 0x7ffce8b7fd81, newdfd: CWD, newname: 0x7ffce8b7fd83, flags: 1) = -1 EXDEV Invalid cross-device link
2.073 ( 0.009 ms): mv/12334 renameat2(olddfd: CWD, oldname: 0x7ffce8b7fd81, newdfd: CWD, newname: 0x55ce7f0a1cc0, flags: 1mv: ) = -1 EEXIST File exists'c' and '/tmp/c' are the same file
#

Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Namhyung Kim <namhyung@kernel.org>
Link: https://lkml.kernel.org/n/tip-8q9l92eh9eee3y2bwyqku3tc@git.kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
---
tools/perf/builtin-trace.c | 3 +++
1 file changed, 3 insertions(+)

diff --git a/tools/perf/builtin-trace.c b/tools/perf/builtin-trace.c
index 406bceda6a2b..60c61a89436f 100644
--- a/tools/perf/builtin-trace.c
+++ b/tools/perf/builtin-trace.c
@@ -799,6 +799,9 @@ static struct syscall_fmt {
.arg = { [2] = { .scnprintf = SCA_MSG_FLAGS, /* flags */ }, }, },
{ .name = "renameat",
.arg = { [0] = { .scnprintf = SCA_FDAT, /* dfd */ }, }, },
+ { .name = "renameat2",
+ .arg = { [0] = { .scnprintf = SCA_FDAT, /* olddirfd */ },
+ [2] = { .scnprintf = SCA_FDAT, /* newdirfd */ }, }, },
{ .name = "rt_sigaction",
.arg = { [0] = { .scnprintf = SCA_SIGNUM, /* sig */ }, }, },
{ .name = "rt_sigprocmask",
--
2.19.2