linux-kernel - [PATCH v3 16/16] perf python: Add parse

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Message-Id: <20241022173015.437550-17-irogers@google.com>
Date: Tue, 22 Oct 2024 10:30:14 -0700
From: Ian Rogers <irogers@...gle.com>
To: Peter Zijlstra <peterz@...radead.org>, Ingo Molnar <mingo@...hat.com>, 
	Arnaldo Carvalho de Melo <acme@...nel.org>, Namhyung Kim <namhyung@...nel.org>, 
	Mark Rutland <mark.rutland@....com>, 
	Alexander Shishkin <alexander.shishkin@...ux.intel.com>, Jiri Olsa <jolsa@...nel.org>, 
	Ian Rogers <irogers@...gle.com>, Adrian Hunter <adrian.hunter@...el.com>, 
	Kan Liang <kan.liang@...ux.intel.com>, James Clark <james.clark@...aro.org>, 
	Howard Chu <howardchu95@...il.com>, Athira Jajeev <atrajeev@...ux.vnet.ibm.com>, 
	Michael Petlan <mpetlan@...hat.com>, Veronika Molnarova <vmolnaro@...hat.com>, 
	Dapeng Mi <dapeng1.mi@...ux.intel.com>, Thomas Richter <tmricht@...ux.ibm.com>, 
	Ilya Leoshkevich <iii@...ux.ibm.com>, Colin Ian King <colin.i.king@...il.com>, 
	Weilin Wang <weilin.wang@...el.com>, Andi Kleen <ak@...ux.intel.com>, linux-kernel@...r.kernel.org, 
	linux-perf-users@...r.kernel.org
Subject: [PATCH v3 16/16] perf python: Add parse_events function

Add basic parse_events function that takes a string and returns an
evlist.

Signed-off-by: Ian Rogers <irogers@...gle.com>
---
 tools/perf/util/python.c | 30 ++++++++++++++++++++++++++++++
 1 file changed, 30 insertions(+)

diff --git a/tools/perf/util/python.c b/tools/perf/util/python.c
index 6e2ff0076daa..ec37f887db43 100644
--- a/tools/perf/util/python.c
+++ b/tools/perf/util/python.c
@@ -1201,6 +1201,30 @@ static PyObject *pyrf__tracepoint(struct pyrf_evsel *pevsel,
 #endif // HAVE_LIBTRACEEVENT
 }
 
+static PyObject *pyrf__parse_events(PyObject *self, PyObject *args)
+{
+	const char *input;
+	struct pyrf_evlist *pevlist;
+	struct parse_events_error err;
+
+	if (!PyArg_ParseTuple(args, "s", &input))
+		return NULL;
+
+	pevlist = PyObject_New(struct pyrf_evlist, &pyrf_evlist__type);
+	if (!pevlist)
+		return NULL;
+
+	parse_events_error__init(&err);
+	memset(&pevlist->evlist, 0, sizeof(pevlist->evlist));
+	evlist__init(&pevlist->evlist, NULL, NULL);
+	if (parse_events(&pevlist->evlist, input, &err)) {
+		parse_events_error__print(&err, input);
+		PyErr_SetFromErrno(PyExc_OSError);
+		return NULL;
+	}
+	return (PyObject *)pevlist;
+}
+
 static PyMethodDef perf__methods[] = {
 	{
 		.ml_name  = "tracepoint",
@@ -1208,6 +1232,12 @@ static PyMethodDef perf__methods[] = {
 		.ml_flags = METH_VARARGS | METH_KEYWORDS,
 		.ml_doc	  = PyDoc_STR("Get tracepoint config.")
 	},
+	{
+		.ml_name  = "parse_events",
+		.ml_meth  = (PyCFunction) pyrf__parse_events,
+		.ml_flags = METH_VARARGS,
+		.ml_doc	  = PyDoc_STR("Parse a string of events and return an evlist.")
+	},
 	{ .ml_name = NULL, }
 };
 
-- 
2.47.0.163.g1226f6d8fa-goog