perf script: Handle the num array type in python properly

The raw_syscalls:sys_enter tracer for instance passes has one argument
named 'arg' which is an array of 6 integers. Right the python scripts
gets only 0 passed as an argument. The reason is that
pevent_read_number() can not handle data types of 48 and returns always
0.
This patch changes this by passing num array as list of nums which fit
the description. As a result python will now see a list named arg which
contains 6 (integer) items.

Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Acked-by: Namhyung Kim <namhyung@kernel.org>
Link: http://lkml.kernel.org/n/1401207274-8170-2-git-send-email-bigeasy@linutronix.de
Signed-off-by: Jiri Olsa <jolsa@kernel.org>

1 files changed, 31 insertions, 12 deletions

diff --git a/tools/perf/util/scripting-engines/trace-event-python.c b/tools/perf/util/scripting-engines/trace-event-python.c
index 99c253604231..e55b65a65558 100644
--- a/tools/perf/util/scripting-engines/trace-event-python.c
+++ b/tools/perf/util/scripting-engines/trace-event-python.c
@@ -234,22 +234,41 @@ static inline struct event_format *find_cache_event(struct perf_evsel *evsel)
 static PyObject *get_field_numeric_entry(struct event_format *event,
                 struct format_field *field, void *data)
 {
-        PyObject *obj;
+        bool is_array = field->flags & FIELD_IS_ARRAY;
+        PyObject *obj, *list = NULL;
         unsigned long long val;
+        unsigned int item_size, n_items, i;
 
-        val = read_size(event, data + field->offset, field->size);
-        if (field->flags & FIELD_IS_SIGNED) {
-                if ((long long)val >= LONG_MIN &&
-                                (long long)val <= LONG_MAX)
-                        obj = PyInt_FromLong(val);
-                else
-                        obj = PyLong_FromLongLong(val);
+        if (is_array) {
+                list = PyList_New(field->arraylen);
+                item_size = field->size / field->arraylen;
+                n_items = field->arraylen;
         } else {
-                if (val <= LONG_MAX)
-                        obj = PyInt_FromLong(val);
-                else
-                        obj = PyLong_FromUnsignedLongLong(val);
+                item_size = field->size;
+                n_items = 1;
+        }
+
+        for (i = 0; i < n_items; i++) {
+
+                val = read_size(event, data + field->offset + i * item_size,
+                                item_size);
+                if (field->flags & FIELD_IS_SIGNED) {
+                        if ((long long)val >= LONG_MIN &&
+                                        (long long)val <= LONG_MAX)
+                                obj = PyInt_FromLong(val);
+                        else
+                                obj = PyLong_FromLongLong(val);
+                } else {
+                        if (val <= LONG_MAX)
+                                obj = PyInt_FromLong(val);
+                        else
+                                obj = PyLong_FromUnsignedLongLong(val);
+                }
+                if (is_array)
+                        PyList_SET_ITEM(list, i, obj);
         }
+        if (is_array)
+                obj = list;
         return obj;
 }