[PATCH 3/3] perf trace: Add beautifier for clock_gettime's clk_id argument

[David Ahern]

Before:
0.030 ( 0.002 ms): 2571 clock_gettime(which_clock: 1, tp: 0x7f3b45729cd0 ) = 0

After:
0.030 ( 0.002 ms): 2571 clock_gettime(which_clock: MONOTONIC, tp: 0x7f3b45729cd0 ) = 0

Signed-off-by: David Ahern <dsahern@xxxxxxxxx>
Cc: Adrian Hunter <adrian.hunter@xxxxxxxxx>
Cc: Frederic Weisbecker <fweisbec@xxxxxxxxx>
Cc: Jiri Olsa <jolsa@xxxxxxxxxx>
Cc: Mike Galbraith <efault@xxxxxx>
Cc: Paul Mackerras <paulus@xxxxxxxxx>
Cc: Peter Zijlstra <peterz@xxxxxxxxxxxxx>
Cc: Stephane Eranian <eranian@xxxxxxxxxx>
---
 tools/perf/builtin-trace.c |   33 +++++++++++++++++++++++++++++++++
 1 file changed, 33 insertions(+)

diff --git a/tools/perf/builtin-trace.c b/tools/perf/builtin-trace.c
index b245102..f943960 100644
--- a/tools/perf/builtin-trace.c
+++ b/tools/perf/builtin-trace.c
@@ -428,6 +428,37 @@ static size_t syscall_arg__scnprintf_signum(char *bf, size_t size, struct syscal
 
 #define SCA_SIGNUM syscall_arg__scnprintf_signum
 
+static size_t
+syscall_arg__scnprintf_clk_gettime(char *bf, size_t size,
+				   struct syscall_arg *arg)
+{
+	size_t printed = 0;
+	clockid_t clk_id = arg->val;
+
+	switch (clk_id) {
+#define	P_CLOCK_ID(n) case CLOCK_##n: printed = scnprintf(bf, size, #n);
+	P_CLOCK_ID(REALTIME);		break;
+#ifdef CLOCK_REALTIME_COARSE
+	P_CLOCK_ID(REALTIME_COARSE);	break;
+#endif
+	P_CLOCK_ID(MONOTONIC);		break;
+#ifdef CLOCK_MONOTONIC_RAW
+	P_CLOCK_ID(MONOTONIC_RAW);	break;
+#endif
+#ifdef CLOCK_MONOTONIC_COARSE
+	P_CLOCK_ID(MONOTONIC_COARSE);	break;
+#endif
+	P_CLOCK_ID(PROCESS_CPUTIME_ID);	break;
+	P_CLOCK_ID(THREAD_CPUTIME_ID);	break;
+#undef P_CLOCK_ID
+	default: printed = scnprintf(bf, size, "%#x", arg); break;
+	}
+
+	return printed;
+}
+
+#define SCA_CLOCK_ID syscall_arg__scnprintf_clk_gettime
+
 static struct syscall_fmt {
 	const char *name;
 	const char *alias;
@@ -442,6 +473,8 @@ static struct syscall_fmt {
 	{ .name	    = "arch_prctl", .errmsg = true, .alias = "prctl", },
 	{ .name	    = "brk",	    .hexret = true,
 	  .arg_scnprintf = { [0] = SCA_HEX, /* brk */ }, },
+	{ .name	    = "clock_gettime", .errmsg = true,
+	  .arg_scnprintf = { [0] = SCA_CLOCK_ID, /* clk_id */ }, },
 	{ .name	    = "connect",    .errmsg = true, },
 	{ .name	    = "fcntl",	    .errmsg = true,
 	  .arg_scnprintf = { [1] = SCA_STRARRAY, /* cmd */ },
-- 
1.7.10.1

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