perf trace: Beautify flock 'cmd' arg

  4735.638 ( 0.003 ms): man/19881 flock(fd: 3, cmd: SH|NB) = 0
  4735.832 ( 0.002 ms): man/19881 flock(fd: 3, cmd: UN   ) = 0

Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: David Ahern <dsahern@gmail.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Mike Galbraith <efault@gmx.de>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Stephane Eranian <eranian@google.com>
Link: http://lkml.kernel.org/n/tip-amh3y88kh1nmclpwezqlarl8@git.kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

1 files changed, 33 insertions, 0 deletions

diff --git a/tools/perf/builtin-trace.c b/tools/perf/builtin-trace.c
index 807e542da623..2007c8c2c52b 100644
--- a/tools/perf/builtin-trace.c
+++ b/tools/perf/builtin-trace.c
@@ -189,6 +189,37 @@ static size_t syscall_arg__scnprintf_madvise_behavior(char *bf, size_t size,
 
 #define SCA_MADV_BHV syscall_arg__scnprintf_madvise_behavior
 
+static size_t syscall_arg__scnprintf_flock(char *bf, size_t size,
+                                           struct syscall_arg *arg)
+{
+        int printed = 0, op = arg->val;
+
+        if (op == 0)
+                return scnprintf(bf, size, "NONE");
+#define P_CMD(cmd) \
+        if ((op & LOCK_##cmd) == LOCK_##cmd) { \
+                printed += scnprintf(bf + printed, size - printed, "%s%s", printed ? "|" : "", #cmd); \
+                op &= ~LOCK_##cmd; \
+        }
+
+        P_CMD(SH);
+        P_CMD(EX);
+        P_CMD(NB);
+        P_CMD(UN);
+        P_CMD(MAND);
+        P_CMD(RW);
+        P_CMD(READ);
+        P_CMD(WRITE);
+#undef P_OP
+
+        if (op)
+                printed += scnprintf(bf + printed, size - printed, "%s%#x", printed ? "|" : "", op);
+
+        return printed;
+}
+
+#define SCA_FLOCK syscall_arg__scnprintf_flock
+
 static size_t syscall_arg__scnprintf_futex_op(char *bf, size_t size, struct syscall_arg *arg)
 {
         enum syscall_futex_args {
@@ -554,6 +585,8 @@ static struct syscall_fmt {
         { .name     = "fcntl",      .errmsg = true,
           .arg_scnprintf = { [1] = SCA_STRARRAY, /* cmd */ },
           .arg_parm      = { [1] = &strarray__fcntl_cmds, /* cmd */ }, },
+        { .name     = "flock",      .errmsg = true,
+          .arg_scnprintf = { [1] = SCA_FLOCK, /* cmd */ }, },
         { .name     = "fstat",      .errmsg = true, .alias = "newfstat", },
         { .name     = "fstatat",    .errmsg = true, .alias = "newfstatat", },
         { .name     = "futex",      .errmsg = true,