perf trace: Add beautifier for lseek's whence arg
[root@zoo ~]# perf trace -a -e lseek | head -1
546.922 ( 0.004 ms): 1184 lseek(fd: 26, offset: 0, whence: CUR) = 2
[root@zoo ~]#
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-2eiuhwz9jbnhj80q6jaqeji4@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 1a6cb74..02aaea6 100644
--- a/tools/perf/builtin-trace.c
+++ b/tools/perf/builtin-trace.c
@@ -24,6 +24,31 @@
#define SCA_HEX syscall_arg__scnprintf_hex
+static size_t syscall_arg__scnprintf_whence(char *bf, size_t size,
+ unsigned long arg, u8 *arg_mask __maybe_unused)
+{
+ int whence = arg;
+
+ switch (whence) {
+#define P_WHENCE(n) case SEEK_##n: return scnprintf(bf, size, #n)
+ P_WHENCE(SET);
+ P_WHENCE(CUR);
+ P_WHENCE(END);
+#ifdef SEEK_DATA
+ P_WHENCE(DATA);
+#endif
+#ifdef SEEK_HOLE
+ P_WHENCE(HOLE);
+#endif
+#undef P_WHENCE
+ default: break;
+ }
+
+ return scnprintf(bf, size, "%#x", whence);
+}
+
+#define SCA_WHENCE syscall_arg__scnprintf_whence
+
static size_t syscall_arg__scnprintf_mmap_prot(char *bf, size_t size,
unsigned long arg, u8 *arg_mask __maybe_unused)
{
@@ -201,6 +226,8 @@
.arg_scnprintf = { [1] = SCA_FUTEX_OP, /* op */ }, },
{ .name = "ioctl", .errmsg = true,
.arg_scnprintf = { [2] = SCA_HEX, /* arg */ }, },
+ { .name = "lseek", .errmsg = true,
+ .arg_scnprintf = { [2] = SCA_WHENCE, /* whence */ }, },
{ .name = "lstat", .errmsg = true, .alias = "newlstat", },
{ .name = "madvise", .errmsg = true,
.arg_scnprintf = { [0] = SCA_HEX, /* start */