perf trace: Separate tp syscall field caching into init routine to be reused

We need to set this in evsels coming out of a perf.data file header, not
just for new ones created for live sessions.

So separate the code that caches the syscall entry/exit tracepoint
format fields into a new function that will be used in the next
changeset.

Signed-off-by: Namhyung Kim <namhyung@kernel.org>
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/r/20131112115700.GC4053@ghostprotocols.net
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

1 files changed, 20 insertions, 8 deletions

diff --git a/tools/perf/builtin-trace.c b/tools/perf/builtin-trace.c
index aeb6296a76bd..3fa1dce6d43e 100644
--- a/tools/perf/builtin-trace.c
+++ b/tools/perf/builtin-trace.c
@@ -149,20 +149,32 @@ static void perf_evsel__delete_priv(struct perf_evsel *evsel)
         perf_evsel__delete(evsel);
 }
 
+static int perf_evsel__init_syscall_tp(struct perf_evsel *evsel, void *handler)
+{
+        evsel->priv = malloc(sizeof(struct syscall_tp));
+        if (evsel->priv != NULL) {
+                if (perf_evsel__init_sc_tp_uint_field(evsel, id))
+                        goto out_delete;
+
+                evsel->handler = handler;
+                return 0;
+        }
+
+        return -ENOMEM;
+
+out_delete:
+        free(evsel->priv);
+        evsel->priv = NULL;
+        return -ENOENT;
+}
+
 static struct perf_evsel *perf_evsel__syscall_newtp(const char *direction, void *handler)
 {
         struct perf_evsel *evsel = perf_evsel__newtp("raw_syscalls", direction);
 
         if (evsel) {
-                evsel->priv = malloc(sizeof(struct syscall_tp));
-
-                if (evsel->priv == NULL)
+                if (perf_evsel__init_syscall_tp(evsel, handler))
                         goto out_delete;
-
-                if (perf_evsel__init_sc_tp_uint_field(evsel, id))
-                        goto out_delete;
-
-                evsel->handler = handler;
         }
 
         return evsel;