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>

diff --git a/tools/perf/builtin-trace.c b/tools/perf/builtin-trace.c
index 807e542da6237aff64122b8a371b50f2b010192b..2007c8c2c52b534ad0e848bd73d92ae46e88e21e 100644 (file)
--- 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,