perf scripting python: Assign perf_script_context

The scripting_context pointer itself does not change and nor does it need
to. Put it directly into the script as a variable at the start so it does
not have to be passed on each call into the script.

Signed-off-by: Adrian Hunter <adrian.hunter@intel.com>
Cc: Andi Kleen <ak@linux.intel.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Link: https://lore.kernel.org/r/20210530192308.7382-6-adrian.hunter@intel.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

2 files changed, 35 insertions, 1 deletions

diff --git a/tools/perf/scripts/python/Perf-Trace-Util/Context.c b/tools/perf/scripts/python/Perf-Trace-Util/Context.c
index 7cef02d75bc7..26a45ae78be4 100644
--- a/tools/perf/scripts/python/Perf-Trace-Util/Context.c
+++ b/tools/perf/scripts/python/Perf-Trace-Util/Context.c
@@ -91,6 +91,12 @@ PyMODINIT_FUNC PyInit_perf_trace_context(void)
 		NULL,			/* m_clear */
 		NULL,			/* m_free */
 	};
-	return PyModule_Create(&moduledef);
+	PyObject *mod;
+
+	mod = PyModule_Create(&moduledef);
+	/* Add perf_script_context to the module so it can be imported */
+	PyObject_SetAttrString(mod, "perf_script_context", Py_None);
+
+	return mod;
 }
 #endif
diff --git a/tools/perf/util/scripting-engines/trace-event-python.c b/tools/perf/util/scripting-engines/trace-event-python.c
index 02d134b6ba8d..164d2f45028c 100644
--- a/tools/perf/util/scripting-engines/trace-event-python.c
+++ b/tools/perf/util/scripting-engines/trace-event-python.c
@@ -1599,6 +1599,31 @@ static void python_process_stat_interval(u64 tstamp)
 	Py_DECREF(t);
 }
 
+static int perf_script_context_init(void)
+{
+	PyObject *perf_script_context;
+	PyObject *perf_trace_context;
+	PyObject *dict;
+	int ret;
+
+	perf_trace_context = PyImport_AddModule("perf_trace_context");
+	if (!perf_trace_context)
+		return -1;
+	dict = PyModule_GetDict(perf_trace_context);
+	if (!dict)
+		return -1;
+
+	perf_script_context = _PyCapsule_New(scripting_context, NULL, NULL);
+	if (!perf_script_context)
+		return -1;
+
+	ret = PyDict_SetItemString(dict, "perf_script_context", perf_script_context);
+	if (!ret)
+		ret = PyDict_SetItemString(main_dict, "perf_script_context", perf_script_context);
+	Py_DECREF(perf_script_context);
+	return ret;
+}
+
 static int run_start_sub(void)
 {
 	main_module = PyImport_AddModule("__main__");
@@ -1611,6 +1636,9 @@ static int run_start_sub(void)
 		goto error;
 	Py_INCREF(main_dict);
 
+	if (perf_script_context_init())
+		goto error;
+
 	try_call_object("trace_begin", NULL);
 
 	return 0;