[tip:perf/core] perf trace beauty futex: Beautify FUTEX_BITSET_MATCH_ANY

[tip-bot for Arnaldo Carvalho de Melo]

Commit-ID:  53996e5b5cbbf14eb26cc09d62e8eb36fc8ac786
Gitweb:     https://git.kernel.org/tip/53996e5b5cbbf14eb26cc09d62e8eb36fc8ac786
Author:     Arnaldo Carvalho de Melo <acme@xxxxxxxxxx>
AuthorDate: Mon, 22 Jan 2018 12:56:59 -0300
Committer:  Arnaldo Carvalho de Melo <acme@xxxxxxxxxx>
CommitDate: Tue, 23 Jan 2018 09:51:51 -0300

perf trace beauty futex: Beautify FUTEX_BITSET_MATCH_ANY

E.g.:

  # strace -e futex -p 14437
  strace: Process 14437 attached
  futex(0x7f46f4808d70, FUTEX_WAKE_PRIVATE, 1) = 0
  futex(0x7f46f24e68b0, FUTEX_WAIT_BITSET_PRIVATE|FUTEX_CLOCK_REALTIME, 0, {tv_sec=1516636744, tv_nsec=221969000}, 0xffffffff) = -1 ETIMEDOUT (Connection timed out)
 <detached ...>
  #

Should pretty print that 0xffffffff value, like:

  # trace -e futex --tid 14437
     0.028 (   0.005 ms): futex(uaddr: 0x7f46f4808d70, op: WAKE|PRIV, val: 1                    ) = 0
     0.037 (1000.092 ms): futex(uaddr: 0x7f46f24e68b0, op: WAIT_BITSET|PRIV|CLKRT, utime: 0x7f46f23fedf0, val3: MATCH_ANY) = -1 ETIMEDOUT Connection timed out
^C#

Cc: Adrian Hunter <adrian.hunter@xxxxxxxxx>
Cc: David Ahern <dsahern@xxxxxxxxx>
Cc: Jiri Olsa <jolsa@xxxxxxxxxx>
Cc: Namhyung Kim <namhyung@xxxxxxxxxx>
Cc: Wang Nan <wangnan0@xxxxxxxxxx>
Link: https://lkml.kernel.org/n/tip-raef6e352la90600yksthao1@xxxxxxxxxxxxxx
Signed-off-by: Arnaldo Carvalho de Melo <acme@xxxxxxxxxx>
---
 tools/perf/builtin-trace.c           |  4 +++-
 tools/perf/trace/beauty/futex_val3.c | 18 ++++++++++++++++++
 2 files changed, 21 insertions(+), 1 deletion(-)

diff --git a/tools/perf/builtin-trace.c b/tools/perf/builtin-trace.c
index ab00096..46d3ff0 100644
--- a/tools/perf/builtin-trace.c
+++ b/tools/perf/builtin-trace.c
@@ -549,6 +549,7 @@ static size_t syscall_arg__scnprintf_getrandom_flags(char *bf, size_t size,
 #include "trace/beauty/eventfd.c"
 #include "trace/beauty/flock.c"
 #include "trace/beauty/futex_op.c"
+#include "trace/beauty/futex_val3.c"
 #include "trace/beauty/mmap.c"
 #include "trace/beauty/mode_t.c"
 #include "trace/beauty/msg_flags.c"
@@ -611,7 +612,8 @@ static struct syscall_fmt {
 	{ .name	    = "fstat", .alias = "newfstat", },
 	{ .name	    = "fstatat", .alias = "newfstatat", },
 	{ .name	    = "futex",
-	  .arg = { [1] = { .scnprintf = SCA_FUTEX_OP, /* op */ }, }, },
+	  .arg = { [1] = { .scnprintf = SCA_FUTEX_OP, /* op */ },
+		   [5] = { .scnprintf = SCA_FUTEX_VAL3, /* val3 */ }, }, },
 	{ .name	    = "futimesat",
 	  .arg = { [0] = { .scnprintf = SCA_FDAT, /* fd */ }, }, },
 	{ .name	    = "getitimer",
diff --git a/tools/perf/trace/beauty/futex_val3.c b/tools/perf/trace/beauty/futex_val3.c
new file mode 100644
index 0000000..26f6b32
--- /dev/null
+++ b/tools/perf/trace/beauty/futex_val3.c
@@ -0,0 +1,18 @@
+// SPDX-License-Identifier: GPL-2.0
+#include <linux/futex.h>
+
+#ifndef FUTEX_BITSET_MATCH_ANY
+#define FUTEX_BITSET_MATCH_ANY 0xffffffff
+#endif
+
+static size_t syscall_arg__scnprintf_futex_val3(char *bf, size_t size, struct syscall_arg *arg)
+{
+	unsigned int bitset = arg->val;
+
+	if (bitset == FUTEX_BITSET_MATCH_ANY)
+		return scnprintf(bf, size, "MATCH_ANY");
+
+	return scnprintf(bf, size, "%#xd", bitset);
+}
+
+#define SCA_FUTEX_VAL3  syscall_arg__scnprintf_futex_val3