1 /*
2  * trace-event-python.  Feed trace events to an embedded Python interpreter.
3  *
4  * Copyright (C) 2010 Tom Zanussi <tzanussi@gmail.com>
5  *
6  *  This program is free software; you can redistribute it and/or modify
7  *  it under the terms of the GNU General Public License as published by
8  *  the Free Software Foundation; either version 2 of the License, or
9  *  (at your option) any later version.
10  *
11  *  This program is distributed in the hope that it will be useful,
12  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
13  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
14  *  GNU General Public License for more details.
15  *
16  *  You should have received a copy of the GNU General Public License
17  *  along with this program; if not, write to the Free Software
18  *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
19  *
20  */
21 
22 #include <Python.h>
23 
24 #include <stdio.h>
25 #include <stdlib.h>
26 #include <string.h>
27 #include <errno.h>
28 
29 #include "../../perf.h"
30 #include "../evsel.h"
31 #include "../util.h"
32 #include "../event.h"
33 #include "../thread.h"
34 #include "../trace-event.h"
35 
36 PyMODINIT_FUNC initperf_trace_context(void);
37 
38 #define FTRACE_MAX_EVENT				\
39 	((1 << (sizeof(unsigned short) * 8)) - 1)
40 
41 struct event_format *events[FTRACE_MAX_EVENT];
42 
43 #define MAX_FIELDS	64
44 #define N_COMMON_FIELDS	7
45 
46 extern struct scripting_context *scripting_context;
47 
48 static char *cur_field_name;
49 static int zero_flag_atom;
50 
51 static PyObject *main_module, *main_dict;
52 
53 static void handler_call_die(const char *handler_name)
54 {
55 	PyErr_Print();
56 	Py_FatalError("problem in Python trace event handler");
57 }
58 
59 /*
60  * Insert val into into the dictionary and decrement the reference counter.
61  * This is necessary for dictionaries since PyDict_SetItemString() does not
62  * steal a reference, as opposed to PyTuple_SetItem().
63  */
64 static void pydict_set_item_string_decref(PyObject *dict, const char *key, PyObject *val)
65 {
66 	PyDict_SetItemString(dict, key, val);
67 	Py_DECREF(val);
68 }
69 
70 static void define_value(enum print_arg_type field_type,
71 			 const char *ev_name,
72 			 const char *field_name,
73 			 const char *field_value,
74 			 const char *field_str)
75 {
76 	const char *handler_name = "define_flag_value";
77 	PyObject *handler, *t, *retval;
78 	unsigned long long value;
79 	unsigned n = 0;
80 
81 	if (field_type == PRINT_SYMBOL)
82 		handler_name = "define_symbolic_value";
83 
84 	t = PyTuple_New(4);
85 	if (!t)
86 		Py_FatalError("couldn't create Python tuple");
87 
88 	value = eval_flag(field_value);
89 
90 	PyTuple_SetItem(t, n++, PyString_FromString(ev_name));
91 	PyTuple_SetItem(t, n++, PyString_FromString(field_name));
92 	PyTuple_SetItem(t, n++, PyInt_FromLong(value));
93 	PyTuple_SetItem(t, n++, PyString_FromString(field_str));
94 
95 	handler = PyDict_GetItemString(main_dict, handler_name);
96 	if (handler && PyCallable_Check(handler)) {
97 		retval = PyObject_CallObject(handler, t);
98 		if (retval == NULL)
99 			handler_call_die(handler_name);
100 	}
101 
102 	Py_DECREF(t);
103 }
104 
105 static void define_values(enum print_arg_type field_type,
106 			  struct print_flag_sym *field,
107 			  const char *ev_name,
108 			  const char *field_name)
109 {
110 	define_value(field_type, ev_name, field_name, field->value,
111 		     field->str);
112 
113 	if (field->next)
114 		define_values(field_type, field->next, ev_name, field_name);
115 }
116 
117 static void define_field(enum print_arg_type field_type,
118 			 const char *ev_name,
119 			 const char *field_name,
120 			 const char *delim)
121 {
122 	const char *handler_name = "define_flag_field";
123 	PyObject *handler, *t, *retval;
124 	unsigned n = 0;
125 
126 	if (field_type == PRINT_SYMBOL)
127 		handler_name = "define_symbolic_field";
128 
129 	if (field_type == PRINT_FLAGS)
130 		t = PyTuple_New(3);
131 	else
132 		t = PyTuple_New(2);
133 	if (!t)
134 		Py_FatalError("couldn't create Python tuple");
135 
136 	PyTuple_SetItem(t, n++, PyString_FromString(ev_name));
137 	PyTuple_SetItem(t, n++, PyString_FromString(field_name));
138 	if (field_type == PRINT_FLAGS)
139 		PyTuple_SetItem(t, n++, PyString_FromString(delim));
140 
141 	handler = PyDict_GetItemString(main_dict, handler_name);
142 	if (handler && PyCallable_Check(handler)) {
143 		retval = PyObject_CallObject(handler, t);
144 		if (retval == NULL)
145 			handler_call_die(handler_name);
146 	}
147 
148 	Py_DECREF(t);
149 }
150 
151 static void define_event_symbols(struct event_format *event,
152 				 const char *ev_name,
153 				 struct print_arg *args)
154 {
155 	switch (args->type) {
156 	case PRINT_NULL:
157 		break;
158 	case PRINT_ATOM:
159 		define_value(PRINT_FLAGS, ev_name, cur_field_name, "0",
160 			     args->atom.atom);
161 		zero_flag_atom = 0;
162 		break;
163 	case PRINT_FIELD:
164 		free(cur_field_name);
165 		cur_field_name = strdup(args->field.name);
166 		break;
167 	case PRINT_FLAGS:
168 		define_event_symbols(event, ev_name, args->flags.field);
169 		define_field(PRINT_FLAGS, ev_name, cur_field_name,
170 			     args->flags.delim);
171 		define_values(PRINT_FLAGS, args->flags.flags, ev_name,
172 			      cur_field_name);
173 		break;
174 	case PRINT_SYMBOL:
175 		define_event_symbols(event, ev_name, args->symbol.field);
176 		define_field(PRINT_SYMBOL, ev_name, cur_field_name, NULL);
177 		define_values(PRINT_SYMBOL, args->symbol.symbols, ev_name,
178 			      cur_field_name);
179 		break;
180 	case PRINT_HEX:
181 		define_event_symbols(event, ev_name, args->hex.field);
182 		define_event_symbols(event, ev_name, args->hex.size);
183 		break;
184 	case PRINT_STRING:
185 		break;
186 	case PRINT_TYPE:
187 		define_event_symbols(event, ev_name, args->typecast.item);
188 		break;
189 	case PRINT_OP:
190 		if (strcmp(args->op.op, ":") == 0)
191 			zero_flag_atom = 1;
192 		define_event_symbols(event, ev_name, args->op.left);
193 		define_event_symbols(event, ev_name, args->op.right);
194 		break;
195 	default:
196 		/* gcc warns for these? */
197 	case PRINT_BSTRING:
198 	case PRINT_DYNAMIC_ARRAY:
199 	case PRINT_FUNC:
200 	case PRINT_BITMASK:
201 		/* we should warn... */
202 		return;
203 	}
204 
205 	if (args->next)
206 		define_event_symbols(event, ev_name, args->next);
207 }
208 
209 static inline struct event_format *find_cache_event(struct perf_evsel *evsel)
210 {
211 	static char ev_name[256];
212 	struct event_format *event;
213 	int type = evsel->attr.config;
214 
215 	/*
216  	 * XXX: Do we really need to cache this since now we have evsel->tp_format
217  	 * cached already? Need to re-read this "cache" routine that as well calls
218  	 * define_event_symbols() :-\
219  	 */
220 	if (events[type])
221 		return events[type];
222 
223 	events[type] = event = evsel->tp_format;
224 	if (!event)
225 		return NULL;
226 
227 	sprintf(ev_name, "%s__%s", event->system, event->name);
228 
229 	define_event_symbols(event, ev_name, event->print_fmt.args);
230 
231 	return event;
232 }
233 
234 static void python_process_tracepoint(struct perf_sample *sample,
235 				      struct perf_evsel *evsel,
236 				      struct thread *thread,
237 				      struct addr_location *al)
238 {
239 	PyObject *handler, *retval, *context, *t, *obj, *dict = NULL;
240 	static char handler_name[256];
241 	struct format_field *field;
242 	unsigned long long val;
243 	unsigned long s, ns;
244 	struct event_format *event;
245 	unsigned n = 0;
246 	int pid;
247 	int cpu = sample->cpu;
248 	void *data = sample->raw_data;
249 	unsigned long long nsecs = sample->time;
250 	const char *comm = thread__comm_str(thread);
251 
252 	t = PyTuple_New(MAX_FIELDS);
253 	if (!t)
254 		Py_FatalError("couldn't create Python tuple");
255 
256 	event = find_cache_event(evsel);
257 	if (!event)
258 		die("ug! no event found for type %d", (int)evsel->attr.config);
259 
260 	pid = raw_field_value(event, "common_pid", data);
261 
262 	sprintf(handler_name, "%s__%s", event->system, event->name);
263 
264 	handler = PyDict_GetItemString(main_dict, handler_name);
265 	if (handler && !PyCallable_Check(handler))
266 		handler = NULL;
267 	if (!handler) {
268 		dict = PyDict_New();
269 		if (!dict)
270 			Py_FatalError("couldn't create Python dict");
271 	}
272 	s = nsecs / NSECS_PER_SEC;
273 	ns = nsecs - s * NSECS_PER_SEC;
274 
275 	scripting_context->event_data = data;
276 	scripting_context->pevent = evsel->tp_format->pevent;
277 
278 	context = PyCObject_FromVoidPtr(scripting_context, NULL);
279 
280 	PyTuple_SetItem(t, n++, PyString_FromString(handler_name));
281 	PyTuple_SetItem(t, n++, context);
282 
283 	if (handler) {
284 		PyTuple_SetItem(t, n++, PyInt_FromLong(cpu));
285 		PyTuple_SetItem(t, n++, PyInt_FromLong(s));
286 		PyTuple_SetItem(t, n++, PyInt_FromLong(ns));
287 		PyTuple_SetItem(t, n++, PyInt_FromLong(pid));
288 		PyTuple_SetItem(t, n++, PyString_FromString(comm));
289 	} else {
290 		pydict_set_item_string_decref(dict, "common_cpu", PyInt_FromLong(cpu));
291 		pydict_set_item_string_decref(dict, "common_s", PyInt_FromLong(s));
292 		pydict_set_item_string_decref(dict, "common_ns", PyInt_FromLong(ns));
293 		pydict_set_item_string_decref(dict, "common_pid", PyInt_FromLong(pid));
294 		pydict_set_item_string_decref(dict, "common_comm", PyString_FromString(comm));
295 	}
296 	for (field = event->format.fields; field; field = field->next) {
297 		if (field->flags & FIELD_IS_STRING) {
298 			int offset;
299 			if (field->flags & FIELD_IS_DYNAMIC) {
300 				offset = *(int *)(data + field->offset);
301 				offset &= 0xffff;
302 			} else
303 				offset = field->offset;
304 			obj = PyString_FromString((char *)data + offset);
305 		} else { /* FIELD_IS_NUMERIC */
306 			val = read_size(event, data + field->offset,
307 					field->size);
308 			if (field->flags & FIELD_IS_SIGNED) {
309 				if ((long long)val >= LONG_MIN &&
310 				    (long long)val <= LONG_MAX)
311 					obj = PyInt_FromLong(val);
312 				else
313 					obj = PyLong_FromLongLong(val);
314 			} else {
315 				if (val <= LONG_MAX)
316 					obj = PyInt_FromLong(val);
317 				else
318 					obj = PyLong_FromUnsignedLongLong(val);
319 			}
320 		}
321 		if (handler)
322 			PyTuple_SetItem(t, n++, obj);
323 		else
324 			pydict_set_item_string_decref(dict, field->name, obj);
325 
326 	}
327 	if (!handler)
328 		PyTuple_SetItem(t, n++, dict);
329 
330 	if (_PyTuple_Resize(&t, n) == -1)
331 		Py_FatalError("error resizing Python tuple");
332 
333 	if (handler) {
334 		retval = PyObject_CallObject(handler, t);
335 		if (retval == NULL)
336 			handler_call_die(handler_name);
337 	} else {
338 		handler = PyDict_GetItemString(main_dict, "trace_unhandled");
339 		if (handler && PyCallable_Check(handler)) {
340 
341 			retval = PyObject_CallObject(handler, t);
342 			if (retval == NULL)
343 				handler_call_die("trace_unhandled");
344 		}
345 		Py_DECREF(dict);
346 	}
347 
348 	Py_DECREF(t);
349 }
350 
351 static void python_process_general_event(struct perf_sample *sample,
352 					 struct perf_evsel *evsel,
353 					 struct thread *thread,
354 					 struct addr_location *al)
355 {
356 	PyObject *handler, *retval, *t, *dict;
357 	static char handler_name[64];
358 	unsigned n = 0;
359 
360 	/*
361 	 * Use the MAX_FIELDS to make the function expandable, though
362 	 * currently there is only one item for the tuple.
363 	 */
364 	t = PyTuple_New(MAX_FIELDS);
365 	if (!t)
366 		Py_FatalError("couldn't create Python tuple");
367 
368 	dict = PyDict_New();
369 	if (!dict)
370 		Py_FatalError("couldn't create Python dictionary");
371 
372 	snprintf(handler_name, sizeof(handler_name), "%s", "process_event");
373 
374 	handler = PyDict_GetItemString(main_dict, handler_name);
375 	if (!handler || !PyCallable_Check(handler))
376 		goto exit;
377 
378 	pydict_set_item_string_decref(dict, "ev_name", PyString_FromString(perf_evsel__name(evsel)));
379 	pydict_set_item_string_decref(dict, "attr", PyString_FromStringAndSize(
380 			(const char *)&evsel->attr, sizeof(evsel->attr)));
381 	pydict_set_item_string_decref(dict, "sample", PyString_FromStringAndSize(
382 			(const char *)sample, sizeof(*sample)));
383 	pydict_set_item_string_decref(dict, "raw_buf", PyString_FromStringAndSize(
384 			(const char *)sample->raw_data, sample->raw_size));
385 	pydict_set_item_string_decref(dict, "comm",
386 			PyString_FromString(thread__comm_str(thread)));
387 	if (al->map) {
388 		pydict_set_item_string_decref(dict, "dso",
389 			PyString_FromString(al->map->dso->name));
390 	}
391 	if (al->sym) {
392 		pydict_set_item_string_decref(dict, "symbol",
393 			PyString_FromString(al->sym->name));
394 	}
395 
396 	PyTuple_SetItem(t, n++, dict);
397 	if (_PyTuple_Resize(&t, n) == -1)
398 		Py_FatalError("error resizing Python tuple");
399 
400 	retval = PyObject_CallObject(handler, t);
401 	if (retval == NULL)
402 		handler_call_die(handler_name);
403 exit:
404 	Py_DECREF(dict);
405 	Py_DECREF(t);
406 }
407 
408 static void python_process_event(union perf_event *event __maybe_unused,
409 				 struct perf_sample *sample,
410 				 struct perf_evsel *evsel,
411 				 struct thread *thread,
412 				 struct addr_location *al)
413 {
414 	switch (evsel->attr.type) {
415 	case PERF_TYPE_TRACEPOINT:
416 		python_process_tracepoint(sample, evsel, thread, al);
417 		break;
418 	/* Reserve for future process_hw/sw/raw APIs */
419 	default:
420 		python_process_general_event(sample, evsel, thread, al);
421 	}
422 }
423 
424 static int run_start_sub(void)
425 {
426 	PyObject *handler, *retval;
427 	int err = 0;
428 
429 	main_module = PyImport_AddModule("__main__");
430 	if (main_module == NULL)
431 		return -1;
432 	Py_INCREF(main_module);
433 
434 	main_dict = PyModule_GetDict(main_module);
435 	if (main_dict == NULL) {
436 		err = -1;
437 		goto error;
438 	}
439 	Py_INCREF(main_dict);
440 
441 	handler = PyDict_GetItemString(main_dict, "trace_begin");
442 	if (handler == NULL || !PyCallable_Check(handler))
443 		goto out;
444 
445 	retval = PyObject_CallObject(handler, NULL);
446 	if (retval == NULL)
447 		handler_call_die("trace_begin");
448 
449 	Py_DECREF(retval);
450 	return err;
451 error:
452 	Py_XDECREF(main_dict);
453 	Py_XDECREF(main_module);
454 out:
455 	return err;
456 }
457 
458 /*
459  * Start trace script
460  */
461 static int python_start_script(const char *script, int argc, const char **argv)
462 {
463 	const char **command_line;
464 	char buf[PATH_MAX];
465 	int i, err = 0;
466 	FILE *fp;
467 
468 	command_line = malloc((argc + 1) * sizeof(const char *));
469 	command_line[0] = script;
470 	for (i = 1; i < argc + 1; i++)
471 		command_line[i] = argv[i - 1];
472 
473 	Py_Initialize();
474 
475 	initperf_trace_context();
476 
477 	PySys_SetArgv(argc + 1, (char **)command_line);
478 
479 	fp = fopen(script, "r");
480 	if (!fp) {
481 		sprintf(buf, "Can't open python script \"%s\"", script);
482 		perror(buf);
483 		err = -1;
484 		goto error;
485 	}
486 
487 	err = PyRun_SimpleFile(fp, script);
488 	if (err) {
489 		fprintf(stderr, "Error running python script %s\n", script);
490 		goto error;
491 	}
492 
493 	err = run_start_sub();
494 	if (err) {
495 		fprintf(stderr, "Error starting python script %s\n", script);
496 		goto error;
497 	}
498 
499 	free(command_line);
500 
501 	return err;
502 error:
503 	Py_Finalize();
504 	free(command_line);
505 
506 	return err;
507 }
508 
509 /*
510  * Stop trace script
511  */
512 static int python_stop_script(void)
513 {
514 	PyObject *handler, *retval;
515 	int err = 0;
516 
517 	handler = PyDict_GetItemString(main_dict, "trace_end");
518 	if (handler == NULL || !PyCallable_Check(handler))
519 		goto out;
520 
521 	retval = PyObject_CallObject(handler, NULL);
522 	if (retval == NULL)
523 		handler_call_die("trace_end");
524 	else
525 		Py_DECREF(retval);
526 out:
527 	Py_XDECREF(main_dict);
528 	Py_XDECREF(main_module);
529 	Py_Finalize();
530 
531 	return err;
532 }
533 
534 static int python_generate_script(struct pevent *pevent, const char *outfile)
535 {
536 	struct event_format *event = NULL;
537 	struct format_field *f;
538 	char fname[PATH_MAX];
539 	int not_first, count;
540 	FILE *ofp;
541 
542 	sprintf(fname, "%s.py", outfile);
543 	ofp = fopen(fname, "w");
544 	if (ofp == NULL) {
545 		fprintf(stderr, "couldn't open %s\n", fname);
546 		return -1;
547 	}
548 	fprintf(ofp, "# perf script event handlers, "
549 		"generated by perf script -g python\n");
550 
551 	fprintf(ofp, "# Licensed under the terms of the GNU GPL"
552 		" License version 2\n\n");
553 
554 	fprintf(ofp, "# The common_* event handler fields are the most useful "
555 		"fields common to\n");
556 
557 	fprintf(ofp, "# all events.  They don't necessarily correspond to "
558 		"the 'common_*' fields\n");
559 
560 	fprintf(ofp, "# in the format files.  Those fields not available as "
561 		"handler params can\n");
562 
563 	fprintf(ofp, "# be retrieved using Python functions of the form "
564 		"common_*(context).\n");
565 
566 	fprintf(ofp, "# See the perf-trace-python Documentation for the list "
567 		"of available functions.\n\n");
568 
569 	fprintf(ofp, "import os\n");
570 	fprintf(ofp, "import sys\n\n");
571 
572 	fprintf(ofp, "sys.path.append(os.environ['PERF_EXEC_PATH'] + \\\n");
573 	fprintf(ofp, "\t'/scripts/python/Perf-Trace-Util/lib/Perf/Trace')\n");
574 	fprintf(ofp, "\nfrom perf_trace_context import *\n");
575 	fprintf(ofp, "from Core import *\n\n\n");
576 
577 	fprintf(ofp, "def trace_begin():\n");
578 	fprintf(ofp, "\tprint \"in trace_begin\"\n\n");
579 
580 	fprintf(ofp, "def trace_end():\n");
581 	fprintf(ofp, "\tprint \"in trace_end\"\n\n");
582 
583 	while ((event = trace_find_next_event(pevent, event))) {
584 		fprintf(ofp, "def %s__%s(", event->system, event->name);
585 		fprintf(ofp, "event_name, ");
586 		fprintf(ofp, "context, ");
587 		fprintf(ofp, "common_cpu,\n");
588 		fprintf(ofp, "\tcommon_secs, ");
589 		fprintf(ofp, "common_nsecs, ");
590 		fprintf(ofp, "common_pid, ");
591 		fprintf(ofp, "common_comm,\n\t");
592 
593 		not_first = 0;
594 		count = 0;
595 
596 		for (f = event->format.fields; f; f = f->next) {
597 			if (not_first++)
598 				fprintf(ofp, ", ");
599 			if (++count % 5 == 0)
600 				fprintf(ofp, "\n\t");
601 
602 			fprintf(ofp, "%s", f->name);
603 		}
604 		fprintf(ofp, "):\n");
605 
606 		fprintf(ofp, "\t\tprint_header(event_name, common_cpu, "
607 			"common_secs, common_nsecs,\n\t\t\t"
608 			"common_pid, common_comm)\n\n");
609 
610 		fprintf(ofp, "\t\tprint \"");
611 
612 		not_first = 0;
613 		count = 0;
614 
615 		for (f = event->format.fields; f; f = f->next) {
616 			if (not_first++)
617 				fprintf(ofp, ", ");
618 			if (count && count % 3 == 0) {
619 				fprintf(ofp, "\" \\\n\t\t\"");
620 			}
621 			count++;
622 
623 			fprintf(ofp, "%s=", f->name);
624 			if (f->flags & FIELD_IS_STRING ||
625 			    f->flags & FIELD_IS_FLAG ||
626 			    f->flags & FIELD_IS_ARRAY ||
627 			    f->flags & FIELD_IS_SYMBOLIC)
628 				fprintf(ofp, "%%s");
629 			else if (f->flags & FIELD_IS_SIGNED)
630 				fprintf(ofp, "%%d");
631 			else
632 				fprintf(ofp, "%%u");
633 		}
634 
635 		fprintf(ofp, "\\n\" %% \\\n\t\t(");
636 
637 		not_first = 0;
638 		count = 0;
639 
640 		for (f = event->format.fields; f; f = f->next) {
641 			if (not_first++)
642 				fprintf(ofp, ", ");
643 
644 			if (++count % 5 == 0)
645 				fprintf(ofp, "\n\t\t");
646 
647 			if (f->flags & FIELD_IS_FLAG) {
648 				if ((count - 1) % 5 != 0) {
649 					fprintf(ofp, "\n\t\t");
650 					count = 4;
651 				}
652 				fprintf(ofp, "flag_str(\"");
653 				fprintf(ofp, "%s__%s\", ", event->system,
654 					event->name);
655 				fprintf(ofp, "\"%s\", %s)", f->name,
656 					f->name);
657 			} else if (f->flags & FIELD_IS_SYMBOLIC) {
658 				if ((count - 1) % 5 != 0) {
659 					fprintf(ofp, "\n\t\t");
660 					count = 4;
661 				}
662 				fprintf(ofp, "symbol_str(\"");
663 				fprintf(ofp, "%s__%s\", ", event->system,
664 					event->name);
665 				fprintf(ofp, "\"%s\", %s)", f->name,
666 					f->name);
667 			} else
668 				fprintf(ofp, "%s", f->name);
669 		}
670 
671 		fprintf(ofp, "),\n\n");
672 	}
673 
674 	fprintf(ofp, "def trace_unhandled(event_name, context, "
675 		"event_fields_dict):\n");
676 
677 	fprintf(ofp, "\t\tprint ' '.join(['%%s=%%s'%%(k,str(v))"
678 		"for k,v in sorted(event_fields_dict.items())])\n\n");
679 
680 	fprintf(ofp, "def print_header("
681 		"event_name, cpu, secs, nsecs, pid, comm):\n"
682 		"\tprint \"%%-20s %%5u %%05u.%%09u %%8u %%-20s \" %% \\\n\t"
683 		"(event_name, cpu, secs, nsecs, pid, comm),\n");
684 
685 	fclose(ofp);
686 
687 	fprintf(stderr, "generated Python script: %s\n", fname);
688 
689 	return 0;
690 }
691 
692 struct scripting_ops python_scripting_ops = {
693 	.name = "Python",
694 	.start_script = python_start_script,
695 	.stop_script = python_stop_script,
696 	.process_event = python_process_event,
697 	.generate_script = python_generate_script,
698 };
699