perf script: Fix Python support when no libtraceevent

[platform/kernel/linux-starfive.git] / tools / perf / util / scripting-engines / trace-event-python.c

diff --git a/tools/perf/util/scripting-engines/trace-event-python.c b/tools/perf/util/scripting-engines/trace-event-python.c
index 2c2697c..0f4ef61 100644 (file)
--- a/tools/perf/util/scripting-engines/trace-event-python.c
+++ b/tools/perf/util/scripting-engines/trace-event-python.c
@@ -30,7 +30,9 @@
 #include <linux/bitmap.h>
 #include <linux/compiler.h>
 #include <linux/time64.h>
+#ifdef HAVE_LIBTRACEEVENT
 #include <traceevent/event-parse.h>
+#endif
 
 #include "../build-id.h"
 #include "../counts.h"
@@ -87,18 +89,21 @@ PyMODINIT_FUNC initperf_trace_context(void);
 PyMODINIT_FUNC PyInit_perf_trace_context(void);
 #endif
 
+#ifdef HAVE_LIBTRACEEVENT
 #define TRACE_EVENT_TYPE_MAX                           \
        ((1 << (sizeof(unsigned short) * 8)) - 1)
 
 static DECLARE_BITMAP(events_defined, TRACE_EVENT_TYPE_MAX);
 
-#define MAX_FIELDS     64
 #define N_COMMON_FIELDS        7
 
-extern struct scripting_context *scripting_context;
-
 static char *cur_field_name;
 static int zero_flag_atom;
+#endif
+
+#define MAX_FIELDS     64
+
+extern struct scripting_context *scripting_context;
 
 static PyObject *main_module, *main_dict;
 
@@ -153,6 +158,26 @@ static PyObject *get_handler(const char *handler_name)
        return handler;
 }
 
+static void call_object(PyObject *handler, PyObject *args, const char *die_msg)
+{
+       PyObject *retval;
+
+       retval = PyObject_CallObject(handler, args);
+       if (retval == NULL)
+               handler_call_die(die_msg);
+       Py_DECREF(retval);
+}
+
+static void try_call_object(const char *handler_name, PyObject *args)
+{
+       PyObject *handler;
+
+       handler = get_handler(handler_name);
+       if (handler)
+               call_object(handler, args, handler_name);
+}
+
+#ifdef HAVE_LIBTRACEEVENT
 static int get_argument_count(PyObject *handler)
 {
        int arg_count = 0;
@@ -181,25 +206,6 @@ static int get_argument_count(PyObject *handler)
        return arg_count;
 }
 
-static void call_object(PyObject *handler, PyObject *args, const char *die_msg)
-{
-       PyObject *retval;
-
-       retval = PyObject_CallObject(handler, args);
-       if (retval == NULL)
-               handler_call_die(die_msg);
-       Py_DECREF(retval);
-}
-
-static void try_call_object(const char *handler_name, PyObject *args)
-{
-       PyObject *handler;
-
-       handler = get_handler(handler_name);
-       if (handler)
-               call_object(handler, args, handler_name);
-}
-
 static void define_value(enum tep_print_arg_type field_type,
                         const char *ev_name,
                         const char *field_name,
@@ -379,6 +385,7 @@ static PyObject *get_field_numeric_entry(struct tep_event *event,
                obj = list;
        return obj;
 }
+#endif
 
 static const char *get_dsoname(struct map *map)
 {
@@ -906,6 +913,7 @@ static PyObject *get_perf_sample_dict(struct perf_sample *sample,
        return dict;
 }
 
+#ifdef HAVE_LIBTRACEEVENT
 static void python_process_tracepoint(struct perf_sample *sample,
                                      struct evsel *evsel,
                                      struct addr_location *al,
@@ -1035,6 +1043,16 @@ static void python_process_tracepoint(struct perf_sample *sample,
 
        Py_DECREF(t);
 }
+#else
+static void python_process_tracepoint(struct perf_sample *sample __maybe_unused,
+                                     struct evsel *evsel __maybe_unused,
+                                     struct addr_location *al __maybe_unused,
+                                     struct addr_location *addr_al __maybe_unused)
+{
+       fprintf(stderr, "Tracepoint events are not supported because "
+                       "perf is not linked with libtraceevent.\n");
+}
+#endif
 
 static PyObject *tuple_new(unsigned int sz)
 {
@@ -1965,6 +1983,7 @@ static int python_stop_script(void)
        return 0;
 }
 
+#ifdef HAVE_LIBTRACEEVENT
 static int python_generate_script(struct tep_handle *pevent, const char *outfile)
 {
        int i, not_first, count, nr_events;
@@ -2155,6 +2174,18 @@ static int python_generate_script(struct tep_handle *pevent, const char *outfile
 
        return 0;
 }
+#else
+static int python_generate_script(struct tep_handle *pevent __maybe_unused,
+                                 const char *outfile __maybe_unused)
+{
+       fprintf(stderr, "Generating Python perf-script is not supported."
+               "  Install libtraceevent and rebuild perf to enable it.\n"
+               "For example:\n  # apt install libtraceevent-dev (ubuntu)"
+               "\n  # yum install libtraceevent-devel (Fedora)"
+               "\n  etc.\n");
+       return -1;
+}
+#endif
 
 struct scripting_ops python_scripting_ops = {
        .name                   = "Python",